drivers/scsi/hpsa.c

   1 /*
   2  *    Disk Array driver for HP Smart Array SAS controllers
   3  *    Copyright (c) 2019-2020 Microchip Technology Inc. and its subsidiaries
   4  *    Copyright 2016 Microsemi Corporation
   5  *    Copyright 2014-2015 PMC-Sierra, Inc.
   6  *    Copyright 2000,2009-2015 Hewlett-Packard Development Company, L.P.
   7  *
   8  *    This program is free software; you can redistribute it and/or modify
   9  *    it under the terms of the GNU General Public License as published by
  10  *    the Free Software Foundation; version 2 of the License.
  11  *
  12  *    This program is distributed in the hope that it will be useful,
  13  *    but WITHOUT ANY WARRANTY; without even the implied warranty of
  14  *    MERCHANTABILITY OR FITNESS FOR A PARTICULAR PURPOSE, GOOD TITLE or
  15  *    NON INFRINGEMENT.  See the GNU General Public License for more details.
  16  *
  17  *    Questions/Comments/Bugfixes to [email protected]
  18  *
  19  */
  20
  21 #include <linux/module.h>
  22 #include <linux/interrupt.h>
  23 #include <linux/types.h>
  24 #include <linux/pci.h>
  25 #include <linux/kernel.h>
  26 #include <linux/slab.h>
  27 #include <linux/delay.h>
  28 #include <linux/fs.h>
  29 #include <linux/timer.h>
  30 #include <linux/init.h>
  31 #include <linux/spinlock.h>
  32 #include <linux/compat.h>
  33 #include <linux/blktrace_api.h>
  34 #include <linux/uaccess.h>
  35 #include <linux/io.h>
  36 #include <linux/dma-mapping.h>
  37 #include <linux/completion.h>
  38 #include <linux/moduleparam.h>
  39 #include <scsi/scsi.h>
  40 #include <scsi/scsi_cmnd.h>
  41 #include <scsi/scsi_device.h>
  42 #include <scsi/scsi_host.h>
  43 #include <scsi/scsi_tcq.h>
  44 #include <scsi/scsi_eh.h>
  45 #include <scsi/scsi_transport_sas.h>
  46 #include <scsi/scsi_dbg.h>
  47 #include <linux/cciss_ioctl.h>
  48 #include <linux/string.h>
  49 #include <linux/bitmap.h>
  50 #include <linux/atomic.h>
  51 #include <linux/jiffies.h>
  52 #include <linux/percpu-defs.h>
  53 #include <linux/percpu.h>
  54 #include <asm/unaligned.h>
  55 #include <asm/div64.h>
  56 #include "hpsa_cmd.h"
  57 #include "hpsa.h"
  58
  59 /*
  60  * HPSA_DRIVER_VERSION must be 3 byte values (0-255) separated by '.'
  61  * with an optional trailing '-' followed by a byte value (0-255).
  62  */
  63 #define HPSA_DRIVER_VERSION "3.4.20-200"
  64 #define DRIVER_NAME "HP HPSA Driver (v " HPSA_DRIVER_VERSION ")"
  65 #define HPSA "hpsa"
  66
  67 /* How long to wait for CISS doorbell communication */
  68 #define CLEAR_EVENT_WAIT_INTERVAL 20    /* ms for each msleep() call */
  69 #define MODE_CHANGE_WAIT_INTERVAL 10    /* ms for each msleep() call */
  70 #define MAX_CLEAR_EVENT_WAIT 30000      /* times 20 ms = 600 s */
  71 #define MAX_MODE_CHANGE_WAIT 2000       /* times 10 ms = 20 s */
  72 #define MAX_IOCTL_CONFIG_WAIT 1000
  73
  74 /*define how many times we will try a command because of bus resets */
  75 #define MAX_CMD_RETRIES 3
  76 /* How long to wait before giving up on a command */
  77 #define HPSA_EH_PTRAID_TIMEOUT (240 * HZ)
  78
  79 /* Embedded module documentation macros - see modules.h */
  80 MODULE_AUTHOR("Hewlett-Packard Company");
  81 MODULE_DESCRIPTION("Driver for HP Smart Array Controller version " \
  82         HPSA_DRIVER_VERSION);
  83 MODULE_VERSION(HPSA_DRIVER_VERSION);
  84 MODULE_LICENSE("GPL");
  85 MODULE_ALIAS("cciss");
  86
  87 static int hpsa_simple_mode;
  88 module_param(hpsa_simple_mode, int, S_IRUGO|S_IWUSR);
  89 MODULE_PARM_DESC(hpsa_simple_mode,
  90         "Use 'simple mode' rather than 'performant mode'");
  91
  92 /* define the PCI info for the cards we can control */
  93 static const struct pci_device_id hpsa_pci_device_id[] = {
  94         {PCI_VENDOR_ID_HP,     PCI_DEVICE_ID_HP_CISSE,     0x103C, 0x3241},
  95         {PCI_VENDOR_ID_HP,     PCI_DEVICE_ID_HP_CISSE,     0x103C, 0x3243},
  96         {PCI_VENDOR_ID_HP,     PCI_DEVICE_ID_HP_CISSE,     0x103C, 0x3245},
  97         {PCI_VENDOR_ID_HP,     PCI_DEVICE_ID_HP_CISSE,     0x103C, 0x3247},
  98         {PCI_VENDOR_ID_HP,     PCI_DEVICE_ID_HP_CISSE,     0x103C, 0x3249},
  99         {PCI_VENDOR_ID_HP,     PCI_DEVICE_ID_HP_CISSE,     0x103C, 0x324A},
 100         {PCI_VENDOR_ID_HP,     PCI_DEVICE_ID_HP_CISSE,     0x103C, 0x324B},
 101         {PCI_VENDOR_ID_HP,     PCI_DEVICE_ID_HP_CISSE,     0x103C, 0x3233},
 102         {PCI_VENDOR_ID_HP,     PCI_DEVICE_ID_HP_CISSF,     0x103C, 0x3350},
 103         {PCI_VENDOR_ID_HP,     PCI_DEVICE_ID_HP_CISSF,     0x103C, 0x3351},
 104         {PCI_VENDOR_ID_HP,     PCI_DEVICE_ID_HP_CISSF,     0x103C, 0x3352},
 105         {PCI_VENDOR_ID_HP,     PCI_DEVICE_ID_HP_CISSF,     0x103C, 0x3353},
 106         {PCI_VENDOR_ID_HP,     PCI_DEVICE_ID_HP_CISSF,     0x103C, 0x3354},
 107         {PCI_VENDOR_ID_HP,     PCI_DEVICE_ID_HP_CISSF,     0x103C, 0x3355},
 108         {PCI_VENDOR_ID_HP,     PCI_DEVICE_ID_HP_CISSF,     0x103C, 0x3356},
 109         {PCI_VENDOR_ID_HP,     PCI_DEVICE_ID_HP_CISSH,     0x103c, 0x1920},
 110         {PCI_VENDOR_ID_HP,     PCI_DEVICE_ID_HP_CISSH,     0x103C, 0x1921},
 111         {PCI_VENDOR_ID_HP,     PCI_DEVICE_ID_HP_CISSH,     0x103C, 0x1922},
 112         {PCI_VENDOR_ID_HP,     PCI_DEVICE_ID_HP_CISSH,     0x103C, 0x1923},
 113         {PCI_VENDOR_ID_HP,     PCI_DEVICE_ID_HP_CISSH,     0x103C, 0x1924},
 114         {PCI_VENDOR_ID_HP,     PCI_DEVICE_ID_HP_CISSH,     0x103c, 0x1925},
 115         {PCI_VENDOR_ID_HP,     PCI_DEVICE_ID_HP_CISSH,     0x103C, 0x1926},
 116         {PCI_VENDOR_ID_HP,     PCI_DEVICE_ID_HP_CISSH,     0x103C, 0x1928},
 117         {PCI_VENDOR_ID_HP,     PCI_DEVICE_ID_HP_CISSH,     0x103C, 0x1929},
 118         {PCI_VENDOR_ID_HP,     PCI_DEVICE_ID_HP_CISSI,     0x103C, 0x21BD},
 119         {PCI_VENDOR_ID_HP,     PCI_DEVICE_ID_HP_CISSI,     0x103C, 0x21BE},
 120         {PCI_VENDOR_ID_HP,     PCI_DEVICE_ID_HP_CISSI,     0x103C, 0x21BF},
 121         {PCI_VENDOR_ID_HP,     PCI_DEVICE_ID_HP_CISSI,     0x103C, 0x21C0},
 122         {PCI_VENDOR_ID_HP,     PCI_DEVICE_ID_HP_CISSI,     0x103C, 0x21C1},
 123         {PCI_VENDOR_ID_HP,     PCI_DEVICE_ID_HP_CISSI,     0x103C, 0x21C2},
 124         {PCI_VENDOR_ID_HP,     PCI_DEVICE_ID_HP_CISSI,     0x103C, 0x21C3},
 125         {PCI_VENDOR_ID_HP,     PCI_DEVICE_ID_HP_CISSI,     0x103C, 0x21C4},
 126         {PCI_VENDOR_ID_HP,     PCI_DEVICE_ID_HP_CISSI,     0x103C, 0x21C5},
 127         {PCI_VENDOR_ID_HP,     PCI_DEVICE_ID_HP_CISSI,     0x103C, 0x21C6},
 128         {PCI_VENDOR_ID_HP,     PCI_DEVICE_ID_HP_CISSI,     0x103C, 0x21C7},
 129         {PCI_VENDOR_ID_HP,     PCI_DEVICE_ID_HP_CISSI,     0x103C, 0x21C8},
 130         {PCI_VENDOR_ID_HP,     PCI_DEVICE_ID_HP_CISSI,     0x103C, 0x21C9},
 131         {PCI_VENDOR_ID_HP,     PCI_DEVICE_ID_HP_CISSI,     0x103C, 0x21CA},
 132         {PCI_VENDOR_ID_HP,     PCI_DEVICE_ID_HP_CISSI,     0x103C, 0x21CB},
 133         {PCI_VENDOR_ID_HP,     PCI_DEVICE_ID_HP_CISSI,     0x103C, 0x21CC},
 134         {PCI_VENDOR_ID_HP,     PCI_DEVICE_ID_HP_CISSI,     0x103C, 0x21CD},
 135         {PCI_VENDOR_ID_HP,     PCI_DEVICE_ID_HP_CISSI,     0x103C, 0x21CE},
 136         {PCI_VENDOR_ID_ADAPTEC2, 0x0290, 0x9005, 0x0580},
 137         {PCI_VENDOR_ID_ADAPTEC2, 0x0290, 0x9005, 0x0581},
 138         {PCI_VENDOR_ID_ADAPTEC2, 0x0290, 0x9005, 0x0582},
 139         {PCI_VENDOR_ID_ADAPTEC2, 0x0290, 0x9005, 0x0583},
 140         {PCI_VENDOR_ID_ADAPTEC2, 0x0290, 0x9005, 0x0584},
 141         {PCI_VENDOR_ID_ADAPTEC2, 0x0290, 0x9005, 0x0585},
 142         {PCI_VENDOR_ID_HP_3PAR, 0x0075, 0x1590, 0x0076},
 143         {PCI_VENDOR_ID_HP_3PAR, 0x0075, 0x1590, 0x0087},
 144         {PCI_VENDOR_ID_HP_3PAR, 0x0075, 0x1590, 0x007D},
 145         {PCI_VENDOR_ID_HP_3PAR, 0x0075, 0x1590, 0x0088},
 146         {PCI_VENDOR_ID_HP, 0x333f, 0x103c, 0x333f},
 147         {PCI_VENDOR_ID_HP,     PCI_ANY_ID,      PCI_ANY_ID, PCI_ANY_ID,
 148                 PCI_CLASS_STORAGE_RAID << 8, 0xffff << 8, 0},
 149         {PCI_VENDOR_ID_COMPAQ,     PCI_ANY_ID,  PCI_ANY_ID, PCI_ANY_ID,
 150                 PCI_CLASS_STORAGE_RAID << 8, 0xffff << 8, 0},
 151         {0,}
 152 };
 153
 154 MODULE_DEVICE_TABLE(pci, hpsa_pci_device_id);
 155
 156 /*  board_id = Subsystem Device ID & Vendor ID
 157  *  product = Marketing Name for the board
 158  *  access = Address of the struct of function pointers
 159  */
 160 static struct board_type products[] = {
 161         {0x40700E11, "Smart Array 5300", &SA5A_access},
 162         {0x40800E11, "Smart Array 5i", &SA5B_access},
 163         {0x40820E11, "Smart Array 532", &SA5B_access},
 164         {0x40830E11, "Smart Array 5312", &SA5B_access},
 165         {0x409A0E11, "Smart Array 641", &SA5A_access},
 166         {0x409B0E11, "Smart Array 642", &SA5A_access},
 167         {0x409C0E11, "Smart Array 6400", &SA5A_access},
 168         {0x409D0E11, "Smart Array 6400 EM", &SA5A_access},
 169         {0x40910E11, "Smart Array 6i", &SA5A_access},
 170         {0x3225103C, "Smart Array P600", &SA5A_access},
 171         {0x3223103C, "Smart Array P800", &SA5A_access},
 172         {0x3234103C, "Smart Array P400", &SA5A_access},
 173         {0x3235103C, "Smart Array P400i", &SA5A_access},
 174         {0x3211103C, "Smart Array E200i", &SA5A_access},
 175         {0x3212103C, "Smart Array E200", &SA5A_access},
 176         {0x3213103C, "Smart Array E200i", &SA5A_access},
 177         {0x3214103C, "Smart Array E200i", &SA5A_access},
 178         {0x3215103C, "Smart Array E200i", &SA5A_access},
 179         {0x3237103C, "Smart Array E500", &SA5A_access},
 180         {0x323D103C, "Smart Array P700m", &SA5A_access},
 181         {0x3241103C, "Smart Array P212", &SA5_access},
 182         {0x3243103C, "Smart Array P410", &SA5_access},
 183         {0x3245103C, "Smart Array P410i", &SA5_access},
 184         {0x3247103C, "Smart Array P411", &SA5_access},
 185         {0x3249103C, "Smart Array P812", &SA5_access},
 186         {0x324A103C, "Smart Array P712m", &SA5_access},
 187         {0x324B103C, "Smart Array P711m", &SA5_access},
 188         {0x3233103C, "HP StorageWorks 1210m", &SA5_access}, /* alias of 333f */
 189         {0x3350103C, "Smart Array P222", &SA5_access},
 190         {0x3351103C, "Smart Array P420", &SA5_access},
 191         {0x3352103C, "Smart Array P421", &SA5_access},
 192         {0x3353103C, "Smart Array P822", &SA5_access},
 193         {0x3354103C, "Smart Array P420i", &SA5_access},
 194         {0x3355103C, "Smart Array P220i", &SA5_access},
 195         {0x3356103C, "Smart Array P721m", &SA5_access},
 196         {0x1920103C, "Smart Array P430i", &SA5_access},
 197         {0x1921103C, "Smart Array P830i", &SA5_access},
 198         {0x1922103C, "Smart Array P430", &SA5_access},
 199         {0x1923103C, "Smart Array P431", &SA5_access},
 200         {0x1924103C, "Smart Array P830", &SA5_access},
 201         {0x1925103C, "Smart Array P831", &SA5_access},
 202         {0x1926103C, "Smart Array P731m", &SA5_access},
 203         {0x1928103C, "Smart Array P230i", &SA5_access},
 204         {0x1929103C, "Smart Array P530", &SA5_access},
 205         {0x21BD103C, "Smart Array P244br", &SA5_access},
 206         {0x21BE103C, "Smart Array P741m", &SA5_access},
 207         {0x21BF103C, "Smart HBA H240ar", &SA5_access},
 208         {0x21C0103C, "Smart Array P440ar", &SA5_access},
 209         {0x21C1103C, "Smart Array P840ar", &SA5_access},
 210         {0x21C2103C, "Smart Array P440", &SA5_access},
 211         {0x21C3103C, "Smart Array P441", &SA5_access},
 212         {0x21C4103C, "Smart Array", &SA5_access},
 213         {0x21C5103C, "Smart Array P841", &SA5_access},
 214         {0x21C6103C, "Smart HBA H244br", &SA5_access},
 215         {0x21C7103C, "Smart HBA H240", &SA5_access},
 216         {0x21C8103C, "Smart HBA H241", &SA5_access},
 217         {0x21C9103C, "Smart Array", &SA5_access},
 218         {0x21CA103C, "Smart Array P246br", &SA5_access},
 219         {0x21CB103C, "Smart Array P840", &SA5_access},
 220         {0x21CC103C, "Smart Array", &SA5_access},
 221         {0x21CD103C, "Smart Array", &SA5_access},
 222         {0x21CE103C, "Smart HBA", &SA5_access},
 223         {0x05809005, "SmartHBA-SA", &SA5_access},
 224         {0x05819005, "SmartHBA-SA 8i", &SA5_access},
 225         {0x05829005, "SmartHBA-SA 8i8e", &SA5_access},
 226         {0x05839005, "SmartHBA-SA 8e", &SA5_access},
 227         {0x05849005, "SmartHBA-SA 16i", &SA5_access},
 228         {0x05859005, "SmartHBA-SA 4i4e", &SA5_access},
 229         {0x00761590, "HP Storage P1224 Array Controller", &SA5_access},
 230         {0x00871590, "HP Storage P1224e Array Controller", &SA5_access},
 231         {0x007D1590, "HP Storage P1228 Array Controller", &SA5_access},
 232         {0x00881590, "HP Storage P1228e Array Controller", &SA5_access},
 233         {0x333f103c, "HP StorageWorks 1210m Array Controller", &SA5_access},
 234         {0xFFFF103C, "Unknown Smart Array", &SA5_access},
 235 };
 236
 237 static struct scsi_transport_template *hpsa_sas_transport_template;
 238 static int hpsa_add_sas_host(struct ctlr_info *h);
 239 static void hpsa_delete_sas_host(struct ctlr_info *h);
 240 static int hpsa_add_sas_device(struct hpsa_sas_node *hpsa_sas_node,
 241                         struct hpsa_scsi_dev_t *device);
 242 static void hpsa_remove_sas_device(struct hpsa_scsi_dev_t *device);
 243 static struct hpsa_scsi_dev_t
 244         *hpsa_find_device_by_sas_rphy(struct ctlr_info *h,
 245                 struct sas_rphy *rphy);
 246
 247 #define SCSI_CMD_BUSY ((struct scsi_cmnd *)&hpsa_cmd_busy)
 248 static const struct scsi_cmnd hpsa_cmd_busy;
 249 #define SCSI_CMD_IDLE ((struct scsi_cmnd *)&hpsa_cmd_idle)
 250 static const struct scsi_cmnd hpsa_cmd_idle;
 251 static int number_of_controllers;
 252
 253 static irqreturn_t do_hpsa_intr_intx(int irq, void *dev_id);
 254 static irqreturn_t do_hpsa_intr_msi(int irq, void *dev_id);
 255 static int hpsa_ioctl(struct scsi_device *dev, unsigned int cmd,
 256                       void __user *arg);
 257 static int hpsa_passthru_ioctl(struct ctlr_info *h,
 258                                IOCTL_Command_struct *iocommand);
 259 static int hpsa_big_passthru_ioctl(struct ctlr_info *h,
 260                                    BIG_IOCTL_Command_struct *ioc);
 261
 262 #ifdef CONFIG_COMPAT
 263 static int hpsa_compat_ioctl(struct scsi_device *dev, unsigned int cmd,
 264         void __user *arg);
 265 #endif
 266
 267 static void cmd_free(struct ctlr_info *h, struct CommandList *c);
 268 static struct CommandList *cmd_alloc(struct ctlr_info *h);
 269 static void cmd_tagged_free(struct ctlr_info *h, struct CommandList *c);
 270 static struct CommandList *cmd_tagged_alloc(struct ctlr_info *h,
 271                                             struct scsi_cmnd *scmd);
 272 static int fill_cmd(struct CommandList *c, u8 cmd, struct ctlr_info *h,
 273         void *buff, size_t size, u16 page_code, unsigned char *scsi3addr,
 274         int cmd_type);
 275 static void hpsa_free_cmd_pool(struct ctlr_info *h);
 276 #define VPD_PAGE (1 << 8)
 277 #define HPSA_SIMPLE_ERROR_BITS 0x03
 278
 279 static int hpsa_scsi_queue_command(struct Scsi_Host *h, struct scsi_cmnd *cmd);
 280 static void hpsa_scan_start(struct Scsi_Host *);
 281 static int hpsa_scan_finished(struct Scsi_Host *sh,
 282         unsigned long elapsed_time);
 283 static int hpsa_change_queue_depth(struct scsi_device *sdev, int qdepth);
 284
 285 static int hpsa_eh_device_reset_handler(struct scsi_cmnd *scsicmd);
 286 static int hpsa_slave_alloc(struct scsi_device *sdev);
 287 static int hpsa_slave_configure(struct scsi_device *sdev);
 288 static void hpsa_slave_destroy(struct scsi_device *sdev);
 289
 290 static void hpsa_update_scsi_devices(struct ctlr_info *h);
 291 static int check_for_unit_attention(struct ctlr_info *h,
 292         struct CommandList *c);
 293 static void check_ioctl_unit_attention(struct ctlr_info *h,
 294         struct CommandList *c);
 295 /* performant mode helper functions */
 296 static void calc_bucket_map(int *bucket, int num_buckets,
 297         int nsgs, int min_blocks, u32 *bucket_map);
 298 static void hpsa_free_performant_mode(struct ctlr_info *h);
 299 static int hpsa_put_ctlr_into_performant_mode(struct ctlr_info *h);
 300 static inline u32 next_command(struct ctlr_info *h, u8 q);
 301 static int hpsa_find_cfg_addrs(struct pci_dev *pdev, void __iomem *vaddr,
 302                                u32 *cfg_base_addr, u64 *cfg_base_addr_index,
 303                                u64 *cfg_offset);
 304 static int hpsa_pci_find_memory_BAR(struct pci_dev *pdev,
 305                                     unsigned long *memory_bar);
 306 static int hpsa_lookup_board_id(struct pci_dev *pdev, u32 *board_id,
 307                                 bool *legacy_board);
 308 static int wait_for_device_to_become_ready(struct ctlr_info *h,
 309                                            unsigned char lunaddr[],
 310                                            int reply_queue);
 311 static int hpsa_wait_for_board_state(struct pci_dev *pdev, void __iomem *vaddr,
 312                                      int wait_for_ready);
 313 static inline void finish_cmd(struct CommandList *c);
 314 static int hpsa_wait_for_mode_change_ack(struct ctlr_info *h);
 315 #define BOARD_NOT_READY 0
 316 #define BOARD_READY 1
 317 static void hpsa_drain_accel_commands(struct ctlr_info *h);
 318 static void hpsa_flush_cache(struct ctlr_info *h);
 319 static int hpsa_scsi_ioaccel_queue_command(struct ctlr_info *h,
 320         struct CommandList *c, u32 ioaccel_handle, u8 *cdb, int cdb_len,
 321         u8 *scsi3addr, struct hpsa_scsi_dev_t *phys_disk);
 322 static void hpsa_command_resubmit_worker(struct work_struct *work);
 323 static u32 lockup_detected(struct ctlr_info *h);
 324 static int detect_controller_lockup(struct ctlr_info *h);
 325 static void hpsa_disable_rld_caching(struct ctlr_info *h);
 326 static inline int hpsa_scsi_do_report_phys_luns(struct ctlr_info *h,
 327         struct ReportExtendedLUNdata *buf, int bufsize);
 328 static bool hpsa_vpd_page_supported(struct ctlr_info *h,
 329         unsigned char scsi3addr[], u8 page);
 330 static int hpsa_luns_changed(struct ctlr_info *h);
 331 static bool hpsa_cmd_dev_match(struct ctlr_info *h, struct CommandList *c,
 332                                struct hpsa_scsi_dev_t *dev,
 333                                unsigned char *scsi3addr);
 334
 335 static inline struct ctlr_info *sdev_to_hba(struct scsi_device *sdev)
 336 {
 337         unsigned long *priv = shost_priv(sdev->host);
 338         return (struct ctlr_info *) *priv;
 339 }
 340
 341 static inline struct ctlr_info *shost_to_hba(struct Scsi_Host *sh)
 342 {
 343         unsigned long *priv = shost_priv(sh);
 344         return (struct ctlr_info *) *priv;
 345 }
 346
 347 static inline bool hpsa_is_cmd_idle(struct CommandList *c)
 348 {
 349         return c->scsi_cmd == SCSI_CMD_IDLE;
 350 }
 351
 352 /* extract sense key, asc, and ascq from sense data.  -1 means invalid. */
 353 static void decode_sense_data(const u8 *sense_data, int sense_data_len,
 354                         u8 *sense_key, u8 *asc, u8 *ascq)
 355 {
 356         struct scsi_sense_hdr sshdr;
 357         bool rc;
 358
 359         *sense_key = -1;
 360         *asc = -1;
 361         *ascq = -1;
 362
 363         if (sense_data_len < 1)
 364                 return;
 365
 366         rc = scsi_normalize_sense(sense_data, sense_data_len, &sshdr);
 367         if (rc) {
 368                 *sense_key = sshdr.sense_key;
 369                 *asc = sshdr.asc;
 370                 *ascq = sshdr.ascq;
 371         }
 372 }
 373
 374 static int check_for_unit_attention(struct ctlr_info *h,
 375         struct CommandList *c)
 376 {
 377         u8 sense_key, asc, ascq;
 378         int sense_len;
 379
 380         if (c->err_info->SenseLen > sizeof(c->err_info->SenseInfo))
 381                 sense_len = sizeof(c->err_info->SenseInfo);
 382         else
 383                 sense_len = c->err_info->SenseLen;
 384
 385         decode_sense_data(c->err_info->SenseInfo, sense_len,
 386                                 &sense_key, &asc, &ascq);
 387         if (sense_key != UNIT_ATTENTION || asc == 0xff)
 388                 return 0;
 389
 390         switch (asc) {
 391         case STATE_CHANGED:
 392                 dev_warn(&h->pdev->dev,
 393                         "%s: a state change detected, command retried\n",
 394                         h->devname);
 395                 break;
 396         case LUN_FAILED:
 397                 dev_warn(&h->pdev->dev,
 398                         "%s: LUN failure detected\n", h->devname);
 399                 break;
 400         case REPORT_LUNS_CHANGED:
 401                 dev_warn(&h->pdev->dev,
 402                         "%s: report LUN data changed\n", h->devname);
 403         /*
 404          * Note: this REPORT_LUNS_CHANGED condition only occurs on the external
 405          * target (array) devices.
 406          */
 407                 break;
 408         case POWER_OR_RESET:
 409                 dev_warn(&h->pdev->dev,
 410                         "%s: a power on or device reset detected\n",
 411                         h->devname);
 412                 break;
 413         case UNIT_ATTENTION_CLEARED:
 414                 dev_warn(&h->pdev->dev,
 415                         "%s: unit attention cleared by another initiator\n",
 416                         h->devname);
 417                 break;
 418         default:
 419                 dev_warn(&h->pdev->dev,
 420                         "%s: unknown unit attention detected\n",
 421                         h->devname);
 422                 break;
 423         }
 424         return 1;
 425 }
 426
 427 static int check_for_busy(struct ctlr_info *h, struct CommandList *c)
 428 {
 429         if (c->err_info->CommandStatus != CMD_TARGET_STATUS ||
 430                 (c->err_info->ScsiStatus != SAM_STAT_BUSY &&
 431                  c->err_info->ScsiStatus != SAM_STAT_TASK_SET_FULL))
 432                 return 0;
 433         dev_warn(&h->pdev->dev, HPSA "device busy");
 434         return 1;
 435 }
 436
 437 static u32 lockup_detected(struct ctlr_info *h);
 438 static ssize_t host_show_lockup_detected(struct device *dev,
 439                 struct device_attribute *attr, char *buf)
 440 {
 441         int ld;
 442         struct ctlr_info *h;
 443         struct Scsi_Host *shost = class_to_shost(dev);
 444
 445         h = shost_to_hba(shost);
 446         ld = lockup_detected(h);
 447
 448         return sprintf(buf, "ld=%d\n", ld);
 449 }
 450
 451 static ssize_t host_store_hp_ssd_smart_path_status(struct device *dev,
 452                                          struct device_attribute *attr,
 453                                          const char *buf, size_t count)
 454 {
 455         int status, len;
 456         struct ctlr_info *h;
 457         struct Scsi_Host *shost = class_to_shost(dev);
 458         char tmpbuf[10];
 459
 460         if (!capable(CAP_SYS_ADMIN) || !capable(CAP_SYS_RAWIO))
 461                 return -EACCES;
 462         len = count > sizeof(tmpbuf) - 1 ? sizeof(tmpbuf) - 1 : count;
 463         strncpy(tmpbuf, buf, len);
 464         tmpbuf[len] = '\0';
 465         if (sscanf(tmpbuf, "%d", &status) != 1)
 466                 return -EINVAL;
 467         h = shost_to_hba(shost);
 468         h->acciopath_status = !!status;
 469         dev_warn(&h->pdev->dev,
 470                 "hpsa: HP SSD Smart Path %s via sysfs update.\n",
 471                 h->acciopath_status ? "enabled" : "disabled");
 472         return count;
 473 }
 474
 475 static ssize_t host_store_raid_offload_debug(struct device *dev,
 476                                          struct device_attribute *attr,
 477                                          const char *buf, size_t count)
 478 {
 479         int debug_level, len;
 480         struct ctlr_info *h;
 481         struct Scsi_Host *shost = class_to_shost(dev);
 482         char tmpbuf[10];
 483
 484         if (!capable(CAP_SYS_ADMIN) || !capable(CAP_SYS_RAWIO))
 485                 return -EACCES;
 486         len = count > sizeof(tmpbuf) - 1 ? sizeof(tmpbuf) - 1 : count;
 487         strncpy(tmpbuf, buf, len);
 488         tmpbuf[len] = '\0';
 489         if (sscanf(tmpbuf, "%d", &debug_level) != 1)
 490                 return -EINVAL;
 491         if (debug_level < 0)
 492                 debug_level = 0;
 493         h = shost_to_hba(shost);
 494         h->raid_offload_debug = debug_level;
 495         dev_warn(&h->pdev->dev, "hpsa: Set raid_offload_debug level = %d\n",
 496                 h->raid_offload_debug);
 497         return count;
 498 }
 499
 500 static ssize_t host_store_rescan(struct device *dev,
 501                                  struct device_attribute *attr,
 502                                  const char *buf, size_t count)
 503 {
 504         struct ctlr_info *h;
 505         struct Scsi_Host *shost = class_to_shost(dev);
 506         h = shost_to_hba(shost);
 507         hpsa_scan_start(h->scsi_host);
 508         return count;
 509 }
 510
 511 static void hpsa_turn_off_ioaccel_for_device(struct hpsa_scsi_dev_t *device)
 512 {
 513         device->offload_enabled = 0;
 514         device->offload_to_be_enabled = 0;
 515 }
 516
 517 static ssize_t host_show_firmware_revision(struct device *dev,
 518              struct device_attribute *attr, char *buf)
 519 {
 520         struct ctlr_info *h;
 521         struct Scsi_Host *shost = class_to_shost(dev);
 522         unsigned char *fwrev;
 523
 524         h = shost_to_hba(shost);
 525         if (!h->hba_inquiry_data)
 526                 return 0;
 527         fwrev = &h->hba_inquiry_data[32];
 528         return snprintf(buf, 20, "%c%c%c%c\n",
 529                 fwrev[0], fwrev[1], fwrev[2], fwrev[3]);
 530 }
 531
 532 static ssize_t host_show_commands_outstanding(struct device *dev,
 533              struct device_attribute *attr, char *buf)
 534 {
 535         struct Scsi_Host *shost = class_to_shost(dev);
 536         struct ctlr_info *h = shost_to_hba(shost);
 537
 538         return snprintf(buf, 20, "%d\n",
 539                         atomic_read(&h->commands_outstanding));
 540 }
 541
 542 static ssize_t host_show_transport_mode(struct device *dev,
 543         struct device_attribute *attr, char *buf)
 544 {
 545         struct ctlr_info *h;
 546         struct Scsi_Host *shost = class_to_shost(dev);
 547
 548         h = shost_to_hba(shost);
 549         return snprintf(buf, 20, "%s\n",
 550                 h->transMethod & CFGTBL_Trans_Performant ?
 551                         "performant" : "simple");
 552 }
 553
 554 static ssize_t host_show_hp_ssd_smart_path_status(struct device *dev,
 555         struct device_attribute *attr, char *buf)
 556 {
 557         struct ctlr_info *h;
 558         struct Scsi_Host *shost = class_to_shost(dev);
 559
 560         h = shost_to_hba(shost);
 561         return snprintf(buf, 30, "HP SSD Smart Path %s\n",
 562                 (h->acciopath_status == 1) ?  "enabled" : "disabled");
 563 }
 564
 565 /* List of controllers which cannot be hard reset on kexec with reset_devices */
 566 static u32 unresettable_controller[] = {
 567         0x324a103C, /* Smart Array P712m */
 568         0x324b103C, /* Smart Array P711m */
 569         0x3223103C, /* Smart Array P800 */
 570         0x3234103C, /* Smart Array P400 */
 571         0x3235103C, /* Smart Array P400i */
 572         0x3211103C, /* Smart Array E200i */
 573         0x3212103C, /* Smart Array E200 */
 574         0x3213103C, /* Smart Array E200i */
 575         0x3214103C, /* Smart Array E200i */
 576         0x3215103C, /* Smart Array E200i */
 577         0x3237103C, /* Smart Array E500 */
 578         0x323D103C, /* Smart Array P700m */
 579         0x40800E11, /* Smart Array 5i */
 580         0x409C0E11, /* Smart Array 6400 */
 581         0x409D0E11, /* Smart Array 6400 EM */
 582         0x40700E11, /* Smart Array 5300 */
 583         0x40820E11, /* Smart Array 532 */
 584         0x40830E11, /* Smart Array 5312 */
 585         0x409A0E11, /* Smart Array 641 */
 586         0x409B0E11, /* Smart Array 642 */
 587         0x40910E11, /* Smart Array 6i */
 588 };
 589
 590 /* List of controllers which cannot even be soft reset */
 591 static u32 soft_unresettable_controller[] = {
 592         0x40800E11, /* Smart Array 5i */
 593         0x40700E11, /* Smart Array 5300 */
 594         0x40820E11, /* Smart Array 532 */
 595         0x40830E11, /* Smart Array 5312 */
 596         0x409A0E11, /* Smart Array 641 */
 597         0x409B0E11, /* Smart Array 642 */
 598         0x40910E11, /* Smart Array 6i */
 599         /* Exclude 640x boards.  These are two pci devices in one slot
 600          * which share a battery backed cache module.  One controls the
 601          * cache, the other accesses the cache through the one that controls
 602          * it.  If we reset the one controlling the cache, the other will
 603          * likely not be happy.  Just forbid resetting this conjoined mess.
 604          * The 640x isn't really supported by hpsa anyway.
 605          */
 606         0x409C0E11, /* Smart Array 6400 */
 607         0x409D0E11, /* Smart Array 6400 EM */
 608 };
 609
 610 static int board_id_in_array(u32 a[], int nelems, u32 board_id)
 611 {
 612         int i;
 613
 614         for (i = 0; i < nelems; i++)
 615                 if (a[i] == board_id)
 616                         return 1;
 617         return 0;
 618 }
 619
 620 static int ctlr_is_hard_resettable(u32 board_id)
 621 {
 622         return !board_id_in_array(unresettable_controller,
 623                         ARRAY_SIZE(unresettable_controller), board_id);
 624 }
 625
 626 static int ctlr_is_soft_resettable(u32 board_id)
 627 {
 628         return !board_id_in_array(soft_unresettable_controller,
 629                         ARRAY_SIZE(soft_unresettable_controller), board_id);
 630 }
 631
 632 static int ctlr_is_resettable(u32 board_id)
 633 {
 634         return ctlr_is_hard_resettable(board_id) ||
 635                 ctlr_is_soft_resettable(board_id);
 636 }
 637
 638 static ssize_t host_show_resettable(struct device *dev,
 639         struct device_attribute *attr, char *buf)
 640 {
 641         struct ctlr_info *h;
 642         struct Scsi_Host *shost = class_to_shost(dev);
 643
 644         h = shost_to_hba(shost);
 645         return snprintf(buf, 20, "%d\n", ctlr_is_resettable(h->board_id));
 646 }
 647
 648 static inline int is_logical_dev_addr_mode(unsigned char scsi3addr[])
 649 {
 650         return (scsi3addr[3] & 0xC0) == 0x40;
 651 }
 652
 653 static const char * const raid_label[] = { "0", "4", "1(+0)", "5", "5+1", "6",
 654         "1(+0)ADM", "UNKNOWN", "PHYS DRV"
 655 };
 656 #define HPSA_RAID_0     0
 657 #define HPSA_RAID_4     1
 658 #define HPSA_RAID_1     2       /* also used for RAID 10 */
 659 #define HPSA_RAID_5     3       /* also used for RAID 50 */
 660 #define HPSA_RAID_51    4
 661 #define HPSA_RAID_6     5       /* also used for RAID 60 */
 662 #define HPSA_RAID_ADM   6       /* also used for RAID 1+0 ADM */
 663 #define RAID_UNKNOWN (ARRAY_SIZE(raid_label) - 2)
 664 #define PHYSICAL_DRIVE (ARRAY_SIZE(raid_label) - 1)
 665
 666 static inline bool is_logical_device(struct hpsa_scsi_dev_t *device)
 667 {
 668         return !device->physical_device;
 669 }
 670
 671 static ssize_t raid_level_show(struct device *dev,
 672              struct device_attribute *attr, char *buf)
 673 {
 674         ssize_t l = 0;
 675         unsigned char rlevel;
 676         struct ctlr_info *h;
 677         struct scsi_device *sdev;
 678         struct hpsa_scsi_dev_t *hdev;
 679         unsigned long flags;
 680
 681         sdev = to_scsi_device(dev);
 682         h = sdev_to_hba(sdev);
 683         spin_lock_irqsave(&h->lock, flags);
 684         hdev = sdev->hostdata;
 685         if (!hdev) {
 686                 spin_unlock_irqrestore(&h->lock, flags);
 687                 return -ENODEV;
 688         }
 689
 690         /* Is this even a logical drive? */
 691         if (!is_logical_device(hdev)) {
 692                 spin_unlock_irqrestore(&h->lock, flags);
 693                 l = snprintf(buf, PAGE_SIZE, "N/A\n");
 694                 return l;
 695         }
 696
 697         rlevel = hdev->raid_level;
 698         spin_unlock_irqrestore(&h->lock, flags);
 699         if (rlevel > RAID_UNKNOWN)
 700                 rlevel = RAID_UNKNOWN;
 701         l = snprintf(buf, PAGE_SIZE, "RAID %s\n", raid_label[rlevel]);
 702         return l;
 703 }
 704
 705 static ssize_t lunid_show(struct device *dev,
 706              struct device_attribute *attr, char *buf)
 707 {
 708         struct ctlr_info *h;
 709         struct scsi_device *sdev;
 710         struct hpsa_scsi_dev_t *hdev;
 711         unsigned long flags;
 712         unsigned char lunid[8];
 713
 714         sdev = to_scsi_device(dev);
 715         h = sdev_to_hba(sdev);
 716         spin_lock_irqsave(&h->lock, flags);
 717         hdev = sdev->hostdata;
 718         if (!hdev) {
 719                 spin_unlock_irqrestore(&h->lock, flags);
 720                 return -ENODEV;
 721         }
 722         memcpy(lunid, hdev->scsi3addr, sizeof(lunid));
 723         spin_unlock_irqrestore(&h->lock, flags);
 724         return snprintf(buf, 20, "0x%8phN\n", lunid);
 725 }
 726
 727 static ssize_t unique_id_show(struct device *dev,
 728              struct device_attribute *attr, char *buf)
 729 {
 730         struct ctlr_info *h;
 731         struct scsi_device *sdev;
 732         struct hpsa_scsi_dev_t *hdev;
 733         unsigned long flags;
 734         unsigned char sn[16];
 735
 736         sdev = to_scsi_device(dev);
 737         h = sdev_to_hba(sdev);
 738         spin_lock_irqsave(&h->lock, flags);
 739         hdev = sdev->hostdata;
 740         if (!hdev) {
 741                 spin_unlock_irqrestore(&h->lock, flags);
 742                 return -ENODEV;
 743         }
 744         memcpy(sn, hdev->device_id, sizeof(sn));
 745         spin_unlock_irqrestore(&h->lock, flags);
 746         return snprintf(buf, 16 * 2 + 2,
 747                         "%02X%02X%02X%02X%02X%02X%02X%02X"
 748                         "%02X%02X%02X%02X%02X%02X%02X%02X\n",
 749                         sn[0], sn[1], sn[2], sn[3],
 750                         sn[4], sn[5], sn[6], sn[7],
 751                         sn[8], sn[9], sn[10], sn[11],
 752                         sn[12], sn[13], sn[14], sn[15]);
 753 }
 754
 755 static ssize_t sas_address_show(struct device *dev,
 756               struct device_attribute *attr, char *buf)
 757 {
 758         struct ctlr_info *h;
 759         struct scsi_device *sdev;
 760         struct hpsa_scsi_dev_t *hdev;
 761         unsigned long flags;
 762         u64 sas_address;
 763
 764         sdev = to_scsi_device(dev);
 765         h = sdev_to_hba(sdev);
 766         spin_lock_irqsave(&h->lock, flags);
 767         hdev = sdev->hostdata;
 768         if (!hdev || is_logical_device(hdev) || !hdev->expose_device) {
 769                 spin_unlock_irqrestore(&h->lock, flags);
 770                 return -ENODEV;
 771         }
 772         sas_address = hdev->sas_address;
 773         spin_unlock_irqrestore(&h->lock, flags);
 774
 775         return snprintf(buf, PAGE_SIZE, "0x%016llx\n", sas_address);
 776 }
 777
 778 static ssize_t host_show_hp_ssd_smart_path_enabled(struct device *dev,
 779              struct device_attribute *attr, char *buf)
 780 {
 781         struct ctlr_info *h;
 782         struct scsi_device *sdev;
 783         struct hpsa_scsi_dev_t *hdev;
 784         unsigned long flags;
 785         int offload_enabled;
 786
 787         sdev = to_scsi_device(dev);
 788         h = sdev_to_hba(sdev);
 789         spin_lock_irqsave(&h->lock, flags);
 790         hdev = sdev->hostdata;
 791         if (!hdev) {
 792                 spin_unlock_irqrestore(&h->lock, flags);
 793                 return -ENODEV;
 794         }
 795         offload_enabled = hdev->offload_enabled;
 796         spin_unlock_irqrestore(&h->lock, flags);
 797
 798         if (hdev->devtype == TYPE_DISK || hdev->devtype == TYPE_ZBC)
 799                 return snprintf(buf, 20, "%d\n", offload_enabled);
 800         else
 801                 return snprintf(buf, 40, "%s\n",
 802                                 "Not applicable for a controller");
 803 }
 804
 805 #define MAX_PATHS 8
 806 static ssize_t path_info_show(struct device *dev,
 807              struct device_attribute *attr, char *buf)
 808 {
 809         struct ctlr_info *h;
 810         struct scsi_device *sdev;
 811         struct hpsa_scsi_dev_t *hdev;
 812         unsigned long flags;
 813         int i;
 814         int output_len = 0;
 815         u8 box;
 816         u8 bay;
 817         u8 path_map_index = 0;
 818         char *active;
 819         unsigned char phys_connector[2];
 820
 821         sdev = to_scsi_device(dev);
 822         h = sdev_to_hba(sdev);
 823         spin_lock_irqsave(&h->devlock, flags);
 824         hdev = sdev->hostdata;
 825         if (!hdev) {
 826                 spin_unlock_irqrestore(&h->devlock, flags);
 827                 return -ENODEV;
 828         }
 829
 830         bay = hdev->bay;
 831         for (i = 0; i < MAX_PATHS; i++) {
 832                 path_map_index = 1<<i;
 833                 if (i == hdev->active_path_index)
 834                         active = "Active";
 835                 else if (hdev->path_map & path_map_index)
 836                         active = "Inactive";
 837                 else
 838                         continue;
 839
 840                 output_len += scnprintf(buf + output_len,
 841                                 PAGE_SIZE - output_len,
 842                                 "[%d:%d:%d:%d] %20.20s ",
 843                                 h->scsi_host->host_no,
 844                                 hdev->bus, hdev->target, hdev->lun,
 845                                 scsi_device_type(hdev->devtype));
 846
 847                 if (hdev->devtype == TYPE_RAID || is_logical_device(hdev)) {
 848                         output_len += scnprintf(buf + output_len,
 849                                                 PAGE_SIZE - output_len,
 850                                                 "%s\n", active);
 851                         continue;
 852                 }
 853
 854                 box = hdev->box[i];
 855                 memcpy(&phys_connector, &hdev->phys_connector[i],
 856                         sizeof(phys_connector));
 857                 if (phys_connector[0] < '0')
 858                         phys_connector[0] = '0';
 859                 if (phys_connector[1] < '0')
 860                         phys_connector[1] = '0';
 861                 output_len += scnprintf(buf + output_len,
 862                                 PAGE_SIZE - output_len,
 863                                 "PORT: %.2s ",
 864                                 phys_connector);
 865                 if ((hdev->devtype == TYPE_DISK || hdev->devtype == TYPE_ZBC) &&
 866                         hdev->expose_device) {
 867                         if (box == 0 || box == 0xFF) {
 868                                 output_len += scnprintf(buf + output_len,
 869                                         PAGE_SIZE - output_len,
 870                                         "BAY: %hhu %s\n",
 871                                         bay, active);
 872                         } else {
 873                                 output_len += scnprintf(buf + output_len,
 874                                         PAGE_SIZE - output_len,
 875                                         "BOX: %hhu BAY: %hhu %s\n",
 876                                         box, bay, active);
 877                         }
 878                 } else if (box != 0 && box != 0xFF) {
 879                         output_len += scnprintf(buf + output_len,
 880                                 PAGE_SIZE - output_len, "BOX: %hhu %s\n",
 881                                 box, active);
 882                 } else
 883                         output_len += scnprintf(buf + output_len,
 884                                 PAGE_SIZE - output_len, "%s\n", active);
 885         }
 886
 887         spin_unlock_irqrestore(&h->devlock, flags);
 888         return output_len;
 889 }
 890
 891 static ssize_t host_show_ctlr_num(struct device *dev,
 892         struct device_attribute *attr, char *buf)
 893 {
 894         struct ctlr_info *h;
 895         struct Scsi_Host *shost = class_to_shost(dev);
 896
 897         h = shost_to_hba(shost);
 898         return snprintf(buf, 20, "%d\n", h->ctlr);
 899 }
 900
 901 static ssize_t host_show_legacy_board(struct device *dev,
 902         struct device_attribute *attr, char *buf)
 903 {
 904         struct ctlr_info *h;
 905         struct Scsi_Host *shost = class_to_shost(dev);
 906
 907         h = shost_to_hba(shost);
 908         return snprintf(buf, 20, "%d\n", h->legacy_board ? 1 : 0);
 909 }
 910
 911 static DEVICE_ATTR_RO(raid_level);
 912 static DEVICE_ATTR_RO(lunid);
 913 static DEVICE_ATTR_RO(unique_id);
 914 static DEVICE_ATTR(rescan, S_IWUSR, NULL, host_store_rescan);
 915 static DEVICE_ATTR_RO(sas_address);
 916 static DEVICE_ATTR(hp_ssd_smart_path_enabled, S_IRUGO,
 917                         host_show_hp_ssd_smart_path_enabled, NULL);
 918 static DEVICE_ATTR_RO(path_info);
 919 static DEVICE_ATTR(hp_ssd_smart_path_status, S_IWUSR|S_IRUGO|S_IROTH,
 920                 host_show_hp_ssd_smart_path_status,
 921                 host_store_hp_ssd_smart_path_status);
 922 static DEVICE_ATTR(raid_offload_debug, S_IWUSR, NULL,
 923                         host_store_raid_offload_debug);
 924 static DEVICE_ATTR(firmware_revision, S_IRUGO,
 925         host_show_firmware_revision, NULL);
 926 static DEVICE_ATTR(commands_outstanding, S_IRUGO,
 927         host_show_commands_outstanding, NULL);
 928 static DEVICE_ATTR(transport_mode, S_IRUGO,
 929         host_show_transport_mode, NULL);
 930 static DEVICE_ATTR(resettable, S_IRUGO,
 931         host_show_resettable, NULL);
 932 static DEVICE_ATTR(lockup_detected, S_IRUGO,
 933         host_show_lockup_detected, NULL);
 934 static DEVICE_ATTR(ctlr_num, S_IRUGO,
 935         host_show_ctlr_num, NULL);
 936 static DEVICE_ATTR(legacy_board, S_IRUGO,
 937         host_show_legacy_board, NULL);
 938
 939 static struct attribute *hpsa_sdev_attrs[] = {
 940         &dev_attr_raid_level.attr,
 941         &dev_attr_lunid.attr,
 942         &dev_attr_unique_id.attr,
 943         &dev_attr_hp_ssd_smart_path_enabled.attr,
 944         &dev_attr_path_info.attr,
 945         &dev_attr_sas_address.attr,
 946         NULL,
 947 };
 948
 949 ATTRIBUTE_GROUPS(hpsa_sdev);
 950
 951 static struct attribute *hpsa_shost_attrs[] = {
 952         &dev_attr_rescan.attr,
 953         &dev_attr_firmware_revision.attr,
 954         &dev_attr_commands_outstanding.attr,
 955         &dev_attr_transport_mode.attr,
 956         &dev_attr_resettable.attr,
 957         &dev_attr_hp_ssd_smart_path_status.attr,
 958         &dev_attr_raid_offload_debug.attr,
 959         &dev_attr_lockup_detected.attr,
 960         &dev_attr_ctlr_num.attr,
 961         &dev_attr_legacy_board.attr,
 962         NULL,
 963 };
 964
 965 ATTRIBUTE_GROUPS(hpsa_shost);
 966
 967 #define HPSA_NRESERVED_CMDS     (HPSA_CMDS_RESERVED_FOR_DRIVER +\
 968                                  HPSA_MAX_CONCURRENT_PASSTHRUS)
 969
 970 static struct scsi_host_template hpsa_driver_template = {
 971         .module                 = THIS_MODULE,
 972         .name                   = HPSA,
 973         .proc_name              = HPSA,
 974         .queuecommand           = hpsa_scsi_queue_command,
 975         .scan_start             = hpsa_scan_start,
 976         .scan_finished          = hpsa_scan_finished,
 977         .change_queue_depth     = hpsa_change_queue_depth,
 978         .this_id                = -1,
 979         .eh_device_reset_handler = hpsa_eh_device_reset_handler,
 980         .ioctl                  = hpsa_ioctl,
 981         .slave_alloc            = hpsa_slave_alloc,
 982         .slave_configure        = hpsa_slave_configure,
 983         .slave_destroy          = hpsa_slave_destroy,
 984 #ifdef CONFIG_COMPAT
 985         .compat_ioctl           = hpsa_compat_ioctl,
 986 #endif
 987         .sdev_groups = hpsa_sdev_groups,
 988         .shost_groups = hpsa_shost_groups,
 989         .max_sectors = 2048,
 990         .no_write_same = 1,
 991 };
 992
 993 static inline u32 next_command(struct ctlr_info *h, u8 q)
 994 {
 995         u32 a;
 996         struct reply_queue_buffer *rq = &h->reply_queue[q];
 997
 998         if (h->transMethod & CFGTBL_Trans_io_accel1)
 999                 return h->access.command_completed(h, q);
1000
1001         if (unlikely(!(h->transMethod & CFGTBL_Trans_Performant)))
1002                 return h->access.command_completed(h, q);
1003
1004         if ((rq->head[rq->current_entry] & 1) == rq->wraparound) {
1005                 a = rq->head[rq->current_entry];
1006                 rq->current_entry++;
1007                 atomic_dec(&h->commands_outstanding);
1008         } else {
1009                 a = FIFO_EMPTY;
1010         }
1011         /* Check for wraparound */
1012         if (rq->current_entry == h->max_commands) {
1013                 rq->current_entry = 0;
1014                 rq->wraparound ^= 1;
1015         }
1016         return a;
1017 }
1018
1019 /*
1020  * There are some special bits in the bus address of the
1021  * command that we have to set for the controller to know
1022  * how to process the command:
1023  *
1024  * Normal performant mode:
1025  * bit 0: 1 means performant mode, 0 means simple mode.
1026  * bits 1-3 = block fetch table entry
1027  * bits 4-6 = command type (== 0)
1028  *
1029  * ioaccel1 mode:
1030  * bit 0 = "performant mode" bit.
1031  * bits 1-3 = block fetch table entry
1032  * bits 4-6 = command type (== 110)
1033  * (command type is needed because ioaccel1 mode
1034  * commands are submitted through the same register as normal
1035  * mode commands, so this is how the controller knows whether
1036  * the command is normal mode or ioaccel1 mode.)
1037  *
1038  * ioaccel2 mode:
1039  * bit 0 = "performant mode" bit.
1040  * bits 1-4 = block fetch table entry (note extra bit)
1041  * bits 4-6 = not needed, because ioaccel2 mode has
1042  * a separate special register for submitting commands.
1043  */
1044
1045 /*
1046  * set_performant_mode: Modify the tag for cciss performant
1047  * set bit 0 for pull model, bits 3-1 for block fetch
1048  * register number
1049  */
1050 #define DEFAULT_REPLY_QUEUE (-1)
1051 static void set_performant_mode(struct ctlr_info *h, struct CommandList *c,
1052                                         int reply_queue)
1053 {
1054         if (likely(h->transMethod & CFGTBL_Trans_Performant)) {
1055                 c->busaddr |= 1 | (h->blockFetchTable[c->Header.SGList] << 1);
1056                 if (unlikely(!h->msix_vectors))
1057                         return;
1058                 c->Header.ReplyQueue = reply_queue;
1059         }
1060 }
1061
1062 static void set_ioaccel1_performant_mode(struct ctlr_info *h,
1063                                                 struct CommandList *c,
1064                                                 int reply_queue)
1065 {
1066         struct io_accel1_cmd *cp = &h->ioaccel_cmd_pool[c->cmdindex];
1067
1068         /*
1069          * Tell the controller to post the reply to the queue for this
1070          * processor.  This seems to give the best I/O throughput.
1071          */
1072         cp->ReplyQueue = reply_queue;
1073         /*
1074          * Set the bits in the address sent down to include:
1075          *  - performant mode bit (bit 0)
1076          *  - pull count (bits 1-3)
1077          *  - command type (bits 4-6)
1078          */
1079         c->busaddr |= 1 | (h->ioaccel1_blockFetchTable[c->Header.SGList] << 1) |
1080                                         IOACCEL1_BUSADDR_CMDTYPE;
1081 }
1082
1083 static void set_ioaccel2_tmf_performant_mode(struct ctlr_info *h,
1084                                                 struct CommandList *c,
1085                                                 int reply_queue)
1086 {
1087         struct hpsa_tmf_struct *cp = (struct hpsa_tmf_struct *)
1088                 &h->ioaccel2_cmd_pool[c->cmdindex];
1089
1090         /* Tell the controller to post the reply to the queue for this
1091          * processor.  This seems to give the best I/O throughput.
1092          */
1093         cp->reply_queue = reply_queue;
1094         /* Set the bits in the address sent down to include:
1095          *  - performant mode bit not used in ioaccel mode 2
1096          *  - pull count (bits 0-3)
1097          *  - command type isn't needed for ioaccel2
1098          */
1099         c->busaddr |= h->ioaccel2_blockFetchTable[0];
1100 }
1101
1102 static void set_ioaccel2_performant_mode(struct ctlr_info *h,
1103                                                 struct CommandList *c,
1104                                                 int reply_queue)
1105 {
1106         struct io_accel2_cmd *cp = &h->ioaccel2_cmd_pool[c->cmdindex];
1107
1108         /*
1109          * Tell the controller to post the reply to the queue for this
1110          * processor.  This seems to give the best I/O throughput.
1111          */
1112         cp->reply_queue = reply_queue;
1113         /*
1114          * Set the bits in the address sent down to include:
1115          *  - performant mode bit not used in ioaccel mode 2
1116          *  - pull count (bits 0-3)
1117          *  - command type isn't needed for ioaccel2
1118          */
1119         c->busaddr |= (h->ioaccel2_blockFetchTable[cp->sg_count]);
1120 }
1121
1122 static int is_firmware_flash_cmd(u8 *cdb)
1123 {
1124         return cdb[0] == BMIC_WRITE && cdb[6] == BMIC_FLASH_FIRMWARE;
1125 }
1126
1127 /*
1128  * During firmware flash, the heartbeat register may not update as frequently
1129  * as it should.  So we dial down lockup detection during firmware flash. and
1130  * dial it back up when firmware flash completes.
1131  */
1132 #define HEARTBEAT_SAMPLE_INTERVAL_DURING_FLASH (240 * HZ)
1133 #define HEARTBEAT_SAMPLE_INTERVAL (30 * HZ)
1134 #define HPSA_EVENT_MONITOR_INTERVAL (15 * HZ)
1135 static void dial_down_lockup_detection_during_fw_flash(struct ctlr_info *h,
1136                 struct CommandList *c)
1137 {
1138         if (!is_firmware_flash_cmd(c->Request.CDB))
1139                 return;
1140         atomic_inc(&h->firmware_flash_in_progress);
1141         h->heartbeat_sample_interval = HEARTBEAT_SAMPLE_INTERVAL_DURING_FLASH;
1142 }
1143
1144 static void dial_up_lockup_detection_on_fw_flash_complete(struct ctlr_info *h,
1145                 struct CommandList *c)
1146 {
1147         if (is_firmware_flash_cmd(c->Request.CDB) &&
1148                 atomic_dec_and_test(&h->firmware_flash_in_progress))
1149                 h->heartbeat_sample_interval = HEARTBEAT_SAMPLE_INTERVAL;
1150 }
1151
1152 static void __enqueue_cmd_and_start_io(struct ctlr_info *h,
1153         struct CommandList *c, int reply_queue)
1154 {
1155         dial_down_lockup_detection_during_fw_flash(h, c);
1156         atomic_inc(&h->commands_outstanding);
1157         /*
1158          * Check to see if the command is being retried.
1159          */
1160         if (c->device && !c->retry_pending)
1161                 atomic_inc(&c->device->commands_outstanding);
1162
1163         reply_queue = h->reply_map[raw_smp_processor_id()];
1164         switch (c->cmd_type) {
1165         case CMD_IOACCEL1:
1166                 set_ioaccel1_performant_mode(h, c, reply_queue);
1167                 writel(c->busaddr, h->vaddr + SA5_REQUEST_PORT_OFFSET);
1168                 break;
1169         case CMD_IOACCEL2:
1170                 set_ioaccel2_performant_mode(h, c, reply_queue);
1171                 writel(c->busaddr, h->vaddr + IOACCEL2_INBOUND_POSTQ_32);
1172                 break;
1173         case IOACCEL2_TMF:
1174                 set_ioaccel2_tmf_performant_mode(h, c, reply_queue);
1175                 writel(c->busaddr, h->vaddr + IOACCEL2_INBOUND_POSTQ_32);
1176                 break;
1177         default:
1178                 set_performant_mode(h, c, reply_queue);
1179                 h->access.submit_command(h, c);
1180         }
1181 }
1182
1183 static void enqueue_cmd_and_start_io(struct ctlr_info *h, struct CommandList *c)
1184 {
1185         __enqueue_cmd_and_start_io(h, c, DEFAULT_REPLY_QUEUE);
1186 }
1187
1188 static inline int is_hba_lunid(unsigned char scsi3addr[])
1189 {
1190         return memcmp(scsi3addr, RAID_CTLR_LUNID, 8) == 0;
1191 }
1192
1193 static inline int is_scsi_rev_5(struct ctlr_info *h)
1194 {
1195         if (!h->hba_inquiry_data)
1196                 return 0;
1197         if ((h->hba_inquiry_data[2] & 0x07) == 5)
1198                 return 1;
1199         return 0;
1200 }
1201
1202 static int hpsa_find_target_lun(struct ctlr_info *h,
1203         unsigned char scsi3addr[], int bus, int *target, int *lun)
1204 {
1205         /* finds an unused bus, target, lun for a new physical device
1206          * assumes h->devlock is held
1207          */
1208         int i, found = 0;
1209         DECLARE_BITMAP(lun_taken, HPSA_MAX_DEVICES);
1210
1211         bitmap_zero(lun_taken, HPSA_MAX_DEVICES);
1212
1213         for (i = 0; i < h->ndevices; i++) {
1214                 if (h->dev[i]->bus == bus && h->dev[i]->target != -1)
1215                         __set_bit(h->dev[i]->target, lun_taken);
1216         }
1217
1218         i = find_first_zero_bit(lun_taken, HPSA_MAX_DEVICES);
1219         if (i < HPSA_MAX_DEVICES) {
1220                 /* *bus = 1; */
1221                 *target = i;
1222                 *lun = 0;
1223                 found = 1;
1224         }
1225         return !found;
1226 }
1227
1228 static void hpsa_show_dev_msg(const char *level, struct ctlr_info *h,
1229         struct hpsa_scsi_dev_t *dev, char *description)
1230 {
1231 #define LABEL_SIZE 25
1232         char label[LABEL_SIZE];
1233
1234         if (h == NULL || h->pdev == NULL || h->scsi_host == NULL)
1235                 return;
1236
1237         switch (dev->devtype) {
1238         case TYPE_RAID:
1239                 snprintf(label, LABEL_SIZE, "controller");
1240                 break;
1241         case TYPE_ENCLOSURE:
1242                 snprintf(label, LABEL_SIZE, "enclosure");
1243                 break;
1244         case TYPE_DISK:
1245         case TYPE_ZBC:
1246                 if (dev->external)
1247                         snprintf(label, LABEL_SIZE, "external");
1248                 else if (!is_logical_dev_addr_mode(dev->scsi3addr))
1249                         snprintf(label, LABEL_SIZE, "%s",
1250                                 raid_label[PHYSICAL_DRIVE]);
1251                 else
1252                         snprintf(label, LABEL_SIZE, "RAID-%s",
1253                                 dev->raid_level > RAID_UNKNOWN ? "?" :
1254                                 raid_label[dev->raid_level]);
1255                 break;
1256         case TYPE_ROM:
1257                 snprintf(label, LABEL_SIZE, "rom");
1258                 break;
1259         case TYPE_TAPE:
1260                 snprintf(label, LABEL_SIZE, "tape");
1261                 break;
1262         case TYPE_MEDIUM_CHANGER:
1263                 snprintf(label, LABEL_SIZE, "changer");
1264                 break;
1265         default:
1266                 snprintf(label, LABEL_SIZE, "UNKNOWN");
1267                 break;
1268         }
1269
1270         dev_printk(level, &h->pdev->dev,
1271                         "scsi %d:%d:%d:%d: %s %s %.8s %.16s %s SSDSmartPathCap%c En%c Exp=%d\n",
1272                         h->scsi_host->host_no, dev->bus, dev->target, dev->lun,
1273                         description,
1274                         scsi_device_type(dev->devtype),
1275                         dev->vendor,
1276                         dev->model,
1277                         label,
1278                         dev->offload_config ? '+' : '-',
1279                         dev->offload_to_be_enabled ? '+' : '-',
1280                         dev->expose_device);
1281 }
1282
1283 /* Add an entry into h->dev[] array. */
1284 static int hpsa_scsi_add_entry(struct ctlr_info *h,
1285                 struct hpsa_scsi_dev_t *device,
1286                 struct hpsa_scsi_dev_t *added[], int *nadded)
1287 {
1288         /* assumes h->devlock is held */
1289         int n = h->ndevices;
1290         int i;
1291         unsigned char addr1[8], addr2[8];
1292         struct hpsa_scsi_dev_t *sd;
1293
1294         if (n >= HPSA_MAX_DEVICES) {
1295                 dev_err(&h->pdev->dev, "too many devices, some will be "
1296                         "inaccessible.\n");
1297                 return -1;
1298         }
1299
1300         /* physical devices do not have lun or target assigned until now. */
1301         if (device->lun != -1)
1302                 /* Logical device, lun is already assigned. */
1303                 goto lun_assigned;
1304
1305         /* If this device a non-zero lun of a multi-lun device
1306          * byte 4 of the 8-byte LUN addr will contain the logical
1307          * unit no, zero otherwise.
1308          */
1309         if (device->scsi3addr[4] == 0) {
1310                 /* This is not a non-zero lun of a multi-lun device */
1311                 if (hpsa_find_target_lun(h, device->scsi3addr,
1312                         device->bus, &device->target, &device->lun) != 0)
1313                         return -1;
1314                 goto lun_assigned;
1315         }
1316
1317         /* This is a non-zero lun of a multi-lun device.
1318          * Search through our list and find the device which
1319          * has the same 8 byte LUN address, excepting byte 4 and 5.
1320          * Assign the same bus and target for this new LUN.
1321          * Use the logical unit number from the firmware.
1322          */
1323         memcpy(addr1, device->scsi3addr, 8);
1324         addr1[4] = 0;
1325         addr1[5] = 0;
1326         for (i = 0; i < n; i++) {
1327                 sd = h->dev[i];
1328                 memcpy(addr2, sd->scsi3addr, 8);
1329                 addr2[4] = 0;
1330                 addr2[5] = 0;
1331                 /* differ only in byte 4 and 5? */
1332                 if (memcmp(addr1, addr2, 8) == 0) {
1333                         device->bus = sd->bus;
1334                         device->target = sd->target;
1335                         device->lun = device->scsi3addr[4];
1336                         break;
1337                 }
1338         }
1339         if (device->lun == -1) {
1340                 dev_warn(&h->pdev->dev, "physical device with no LUN=0,"
1341                         " suspect firmware bug or unsupported hardware "
1342                         "configuration.\n");
1343                 return -1;
1344         }
1345
1346 lun_assigned:
1347
1348         h->dev[n] = device;
1349         h->ndevices++;
1350         added[*nadded] = device;
1351         (*nadded)++;
1352         hpsa_show_dev_msg(KERN_INFO, h, device,
1353                 device->expose_device ? "added" : "masked");
1354         return 0;
1355 }
1356
1357 /*
1358  * Called during a scan operation.
1359  *
1360  * Update an entry in h->dev[] array.
1361  */
1362 static void hpsa_scsi_update_entry(struct ctlr_info *h,
1363         int entry, struct hpsa_scsi_dev_t *new_entry)
1364 {
1365         /* assumes h->devlock is held */
1366         BUG_ON(entry < 0 || entry >= HPSA_MAX_DEVICES);
1367
1368         /* Raid level changed. */
1369         h->dev[entry]->raid_level = new_entry->raid_level;
1370
1371         /*
1372          * ioacccel_handle may have changed for a dual domain disk
1373          */
1374         h->dev[entry]->ioaccel_handle = new_entry->ioaccel_handle;
1375
1376         /* Raid offload parameters changed.  Careful about the ordering. */
1377         if (new_entry->offload_config && new_entry->offload_to_be_enabled) {
1378                 /*
1379                  * if drive is newly offload_enabled, we want to copy the
1380                  * raid map data first.  If previously offload_enabled and
1381                  * offload_config were set, raid map data had better be
1382                  * the same as it was before. If raid map data has changed
1383                  * then it had better be the case that
1384                  * h->dev[entry]->offload_enabled is currently 0.
1385                  */
1386                 h->dev[entry]->raid_map = new_entry->raid_map;
1387                 h->dev[entry]->ioaccel_handle = new_entry->ioaccel_handle;
1388         }
1389         if (new_entry->offload_to_be_enabled) {
1390                 h->dev[entry]->ioaccel_handle = new_entry->ioaccel_handle;
1391                 wmb(); /* set ioaccel_handle *before* hba_ioaccel_enabled */
1392         }
1393         h->dev[entry]->hba_ioaccel_enabled = new_entry->hba_ioaccel_enabled;
1394         h->dev[entry]->offload_config = new_entry->offload_config;
1395         h->dev[entry]->offload_to_mirror = new_entry->offload_to_mirror;
1396         h->dev[entry]->queue_depth = new_entry->queue_depth;
1397
1398         /*
1399          * We can turn off ioaccel offload now, but need to delay turning
1400          * ioaccel on until we can update h->dev[entry]->phys_disk[], but we
1401          * can't do that until all the devices are updated.
1402          */
1403         h->dev[entry]->offload_to_be_enabled = new_entry->offload_to_be_enabled;
1404
1405         /*
1406          * turn ioaccel off immediately if told to do so.
1407          */
1408         if (!new_entry->offload_to_be_enabled)
1409                 h->dev[entry]->offload_enabled = 0;
1410
1411         hpsa_show_dev_msg(KERN_INFO, h, h->dev[entry], "updated");
1412 }
1413
1414 /* Replace an entry from h->dev[] array. */
1415 static void hpsa_scsi_replace_entry(struct ctlr_info *h,
1416         int entry, struct hpsa_scsi_dev_t *new_entry,
1417         struct hpsa_scsi_dev_t *added[], int *nadded,
1418         struct hpsa_scsi_dev_t *removed[], int *nremoved)
1419 {
1420         /* assumes h->devlock is held */
1421         BUG_ON(entry < 0 || entry >= HPSA_MAX_DEVICES);
1422         removed[*nremoved] = h->dev[entry];
1423         (*nremoved)++;
1424
1425         /*
1426          * New physical devices won't have target/lun assigned yet
1427          * so we need to preserve the values in the slot we are replacing.
1428          */
1429         if (new_entry->target == -1) {
1430                 new_entry->target = h->dev[entry]->target;
1431                 new_entry->lun = h->dev[entry]->lun;
1432         }
1433
1434         h->dev[entry] = new_entry;
1435         added[*nadded] = new_entry;
1436         (*nadded)++;
1437
1438         hpsa_show_dev_msg(KERN_INFO, h, new_entry, "replaced");
1439 }
1440
1441 /* Remove an entry from h->dev[] array. */
1442 static void hpsa_scsi_remove_entry(struct ctlr_info *h, int entry,
1443         struct hpsa_scsi_dev_t *removed[], int *nremoved)
1444 {
1445         /* assumes h->devlock is held */
1446         int i;
1447         struct hpsa_scsi_dev_t *sd;
1448
1449         BUG_ON(entry < 0 || entry >= HPSA_MAX_DEVICES);
1450
1451         sd = h->dev[entry];
1452         removed[*nremoved] = h->dev[entry];
1453         (*nremoved)++;
1454
1455         for (i = entry; i < h->ndevices-1; i++)
1456                 h->dev[i] = h->dev[i+1];
1457         h->ndevices--;
1458         hpsa_show_dev_msg(KERN_INFO, h, sd, "removed");
1459 }
1460
1461 #define SCSI3ADDR_EQ(a, b) ( \
1462         (a)[7] == (b)[7] && \
1463         (a)[6] == (b)[6] && \
1464         (a)[5] == (b)[5] && \
1465         (a)[4] == (b)[4] && \
1466         (a)[3] == (b)[3] && \
1467         (a)[2] == (b)[2] && \
1468         (a)[1] == (b)[1] && \
1469         (a)[0] == (b)[0])
1470
1471 static void fixup_botched_add(struct ctlr_info *h,
1472         struct hpsa_scsi_dev_t *added)
1473 {
1474         /* called when scsi_add_device fails in order to re-adjust
1475          * h->dev[] to match the mid layer's view.
1476          */
1477         unsigned long flags;
1478         int i, j;
1479
1480         spin_lock_irqsave(&h->lock, flags);
1481         for (i = 0; i < h->ndevices; i++) {
1482                 if (h->dev[i] == added) {
1483                         for (j = i; j < h->ndevices-1; j++)
1484                                 h->dev[j] = h->dev[j+1];
1485                         h->ndevices--;
1486                         break;
1487                 }
1488         }
1489         spin_unlock_irqrestore(&h->lock, flags);
1490         kfree(added);
1491 }
1492
1493 static inline int device_is_the_same(struct hpsa_scsi_dev_t *dev1,
1494         struct hpsa_scsi_dev_t *dev2)
1495 {
1496         /* we compare everything except lun and target as these
1497          * are not yet assigned.  Compare parts likely
1498          * to differ first
1499          */
1500         if (memcmp(dev1->scsi3addr, dev2->scsi3addr,
1501                 sizeof(dev1->scsi3addr)) != 0)
1502                 return 0;
1503         if (memcmp(dev1->device_id, dev2->device_id,
1504                 sizeof(dev1->device_id)) != 0)
1505                 return 0;
1506         if (memcmp(dev1->model, dev2->model, sizeof(dev1->model)) != 0)
1507                 return 0;
1508         if (memcmp(dev1->vendor, dev2->vendor, sizeof(dev1->vendor)) != 0)
1509                 return 0;
1510         if (dev1->devtype != dev2->devtype)
1511                 return 0;
1512         if (dev1->bus != dev2->bus)
1513                 return 0;
1514         return 1;
1515 }
1516
1517 static inline int device_updated(struct hpsa_scsi_dev_t *dev1,
1518         struct hpsa_scsi_dev_t *dev2)
1519 {
1520         /* Device attributes that can change, but don't mean
1521          * that the device is a different device, nor that the OS
1522          * needs to be told anything about the change.
1523          */
1524         if (dev1->raid_level != dev2->raid_level)
1525                 return 1;
1526         if (dev1->offload_config != dev2->offload_config)
1527                 return 1;
1528         if (dev1->offload_to_be_enabled != dev2->offload_to_be_enabled)
1529                 return 1;
1530         if (!is_logical_dev_addr_mode(dev1->scsi3addr))
1531                 if (dev1->queue_depth != dev2->queue_depth)
1532                         return 1;
1533         /*
1534          * This can happen for dual domain devices. An active
1535          * path change causes the ioaccel handle to change
1536          *
1537          * for example note the handle differences between p0 and p1
1538          * Device                    WWN               ,WWN hash,Handle
1539          * D016 p0|0x3 [02]P2E:01:01,0x5000C5005FC4DACA,0x9B5616,0x01030003
1540          *      p1                   0x5000C5005FC4DAC9,0x6798C0,0x00040004
1541          */
1542         if (dev1->ioaccel_handle != dev2->ioaccel_handle)
1543                 return 1;
1544         return 0;
1545 }
1546
1547 /* Find needle in haystack.  If exact match found, return DEVICE_SAME,
1548  * and return needle location in *index.  If scsi3addr matches, but not
1549  * vendor, model, serial num, etc. return DEVICE_CHANGED, and return needle
1550  * location in *index.
1551  * In the case of a minor device attribute change, such as RAID level, just
1552  * return DEVICE_UPDATED, along with the updated device's location in index.
1553  * If needle not found, return DEVICE_NOT_FOUND.
1554  */
1555 static int hpsa_scsi_find_entry(struct hpsa_scsi_dev_t *needle,
1556         struct hpsa_scsi_dev_t *haystack[], int haystack_size,
1557         int *index)
1558 {
1559         int i;
1560 #define DEVICE_NOT_FOUND 0
1561 #define DEVICE_CHANGED 1
1562 #define DEVICE_SAME 2
1563 #define DEVICE_UPDATED 3
1564         if (needle == NULL)
1565                 return DEVICE_NOT_FOUND;
1566
1567         for (i = 0; i < haystack_size; i++) {
1568                 if (haystack[i] == NULL) /* previously removed. */
1569                         continue;
1570                 if (SCSI3ADDR_EQ(needle->scsi3addr, haystack[i]->scsi3addr)) {
1571                         *index = i;
1572                         if (device_is_the_same(needle, haystack[i])) {
1573                                 if (device_updated(needle, haystack[i]))
1574                                         return DEVICE_UPDATED;
1575                                 return DEVICE_SAME;
1576                         } else {
1577                                 /* Keep offline devices offline */
1578                                 if (needle->volume_offline)
1579                                         return DEVICE_NOT_FOUND;
1580                                 return DEVICE_CHANGED;
1581                         }
1582                 }
1583         }
1584         *index = -1;
1585         return DEVICE_NOT_FOUND;
1586 }
1587
1588 static void hpsa_monitor_offline_device(struct ctlr_info *h,
1589                                         unsigned char scsi3addr[])
1590 {
1591         struct offline_device_entry *device;
1592         unsigned long flags;
1593
1594         /* Check to see if device is already on the list */
1595         spin_lock_irqsave(&h->offline_device_lock, flags);
1596         list_for_each_entry(device, &h->offline_device_list, offline_list) {
1597                 if (memcmp(device->scsi3addr, scsi3addr,
1598                         sizeof(device->scsi3addr)) == 0) {
1599                         spin_unlock_irqrestore(&h->offline_device_lock, flags);
1600                         return;
1601                 }
1602         }
1603         spin_unlock_irqrestore(&h->offline_device_lock, flags);
1604
1605         /* Device is not on the list, add it. */
1606         device = kmalloc(sizeof(*device), GFP_KERNEL);
1607         if (!device)
1608                 return;
1609
1610         memcpy(device->scsi3addr, scsi3addr, sizeof(device->scsi3addr));
1611         spin_lock_irqsave(&h->offline_device_lock, flags);
1612         list_add_tail(&device->offline_list, &h->offline_device_list);
1613         spin_unlock_irqrestore(&h->offline_device_lock, flags);
1614 }
1615
1616 /* Print a message explaining various offline volume states */
1617 static void hpsa_show_volume_status(struct ctlr_info *h,
1618         struct hpsa_scsi_dev_t *sd)
1619 {
1620         if (sd->volume_offline == HPSA_VPD_LV_STATUS_UNSUPPORTED)
1621                 dev_info(&h->pdev->dev,
1622                         "C%d:B%d:T%d:L%d Volume status is not available through vital product data pages.\n",
1623                         h->scsi_host->host_no,
1624                         sd->bus, sd->target, sd->lun);
1625         switch (sd->volume_offline) {
1626         case HPSA_LV_OK:
1627                 break;
1628         case HPSA_LV_UNDERGOING_ERASE:
1629                 dev_info(&h->pdev->dev,
1630                         "C%d:B%d:T%d:L%d Volume is undergoing background erase process.\n",
1631                         h->scsi_host->host_no,
1632                         sd->bus, sd->target, sd->lun);
1633                 break;
1634         case HPSA_LV_NOT_AVAILABLE:
1635                 dev_info(&h->pdev->dev,
1636                         "C%d:B%d:T%d:L%d Volume is waiting for transforming volume.\n",
1637                         h->scsi_host->host_no,
1638                         sd->bus, sd->target, sd->lun);
1639                 break;
1640         case HPSA_LV_UNDERGOING_RPI:
1641                 dev_info(&h->pdev->dev,
1642                         "C%d:B%d:T%d:L%d Volume is undergoing rapid parity init.\n",
1643                         h->scsi_host->host_no,
1644                         sd->bus, sd->target, sd->lun);
1645                 break;
1646         case HPSA_LV_PENDING_RPI:
1647                 dev_info(&h->pdev->dev,
1648                         "C%d:B%d:T%d:L%d Volume is queued for rapid parity initialization process.\n",
1649                         h->scsi_host->host_no,
1650                         sd->bus, sd->target, sd->lun);
1651                 break;
1652         case HPSA_LV_ENCRYPTED_NO_KEY:
1653                 dev_info(&h->pdev->dev,
1654                         "C%d:B%d:T%d:L%d Volume is encrypted and cannot be accessed because key is not present.\n",
1655                         h->scsi_host->host_no,
1656                         sd->bus, sd->target, sd->lun);
1657                 break;
1658         case HPSA_LV_PLAINTEXT_IN_ENCRYPT_ONLY_CONTROLLER:
1659                 dev_info(&h->pdev->dev,
1660                         "C%d:B%d:T%d:L%d Volume is not encrypted and cannot be accessed because controller is in encryption-only mode.\n",
1661                         h->scsi_host->host_no,
1662                         sd->bus, sd->target, sd->lun);
1663                 break;
1664         case HPSA_LV_UNDERGOING_ENCRYPTION:
1665                 dev_info(&h->pdev->dev,
1666                         "C%d:B%d:T%d:L%d Volume is undergoing encryption process.\n",
1667                         h->scsi_host->host_no,
1668                         sd->bus, sd->target, sd->lun);
1669                 break;
1670         case HPSA_LV_UNDERGOING_ENCRYPTION_REKEYING:
1671                 dev_info(&h->pdev->dev,
1672                         "C%d:B%d:T%d:L%d Volume is undergoing encryption re-keying process.\n",
1673                         h->scsi_host->host_no,
1674                         sd->bus, sd->target, sd->lun);
1675                 break;
1676         case HPSA_LV_ENCRYPTED_IN_NON_ENCRYPTED_CONTROLLER:
1677                 dev_info(&h->pdev->dev,
1678                         "C%d:B%d:T%d:L%d Volume is encrypted and cannot be accessed because controller does not have encryption enabled.\n",
1679                         h->scsi_host->host_no,
1680                         sd->bus, sd->target, sd->lun);
1681                 break;
1682         case HPSA_LV_PENDING_ENCRYPTION:
1683                 dev_info(&h->pdev->dev,
1684                         "C%d:B%d:T%d:L%d Volume is pending migration to encrypted state, but process has not started.\n",
1685                         h->scsi_host->host_no,
1686                         sd->bus, sd->target, sd->lun);
1687                 break;
1688         case HPSA_LV_PENDING_ENCRYPTION_REKEYING:
1689                 dev_info(&h->pdev->dev,
1690                         "C%d:B%d:T%d:L%d Volume is encrypted and is pending encryption rekeying.\n",
1691                         h->scsi_host->host_no,
1692                         sd->bus, sd->target, sd->lun);
1693                 break;
1694         }
1695 }
1696
1697 /*
1698  * Figure the list of physical drive pointers for a logical drive with
1699  * raid offload configured.
1700  */
1701 static void hpsa_figure_phys_disk_ptrs(struct ctlr_info *h,
1702                                 struct hpsa_scsi_dev_t *dev[], int ndevices,
1703                                 struct hpsa_scsi_dev_t *logical_drive)
1704 {
1705         struct raid_map_data *map = &logical_drive->raid_map;
1706         struct raid_map_disk_data *dd = &map->data[0];
1707         int i, j;
1708         int total_disks_per_row = le16_to_cpu(map->data_disks_per_row) +
1709                                 le16_to_cpu(map->metadata_disks_per_row);
1710         int nraid_map_entries = le16_to_cpu(map->row_cnt) *
1711                                 le16_to_cpu(map->layout_map_count) *
1712                                 total_disks_per_row;
1713         int nphys_disk = le16_to_cpu(map->layout_map_count) *
1714                                 total_disks_per_row;
1715         int qdepth;
1716
1717         if (nraid_map_entries > RAID_MAP_MAX_ENTRIES)
1718                 nraid_map_entries = RAID_MAP_MAX_ENTRIES;
1719
1720         logical_drive->nphysical_disks = nraid_map_entries;
1721
1722         qdepth = 0;
1723         for (i = 0; i < nraid_map_entries; i++) {
1724                 logical_drive->phys_disk[i] = NULL;
1725                 if (!logical_drive->offload_config)
1726                         continue;
1727                 for (j = 0; j < ndevices; j++) {
1728                         if (dev[j] == NULL)
1729                                 continue;
1730                         if (dev[j]->devtype != TYPE_DISK &&
1731                             dev[j]->devtype != TYPE_ZBC)
1732                                 continue;
1733                         if (is_logical_device(dev[j]))
1734                                 continue;
1735                         if (dev[j]->ioaccel_handle != dd[i].ioaccel_handle)
1736                                 continue;
1737
1738                         logical_drive->phys_disk[i] = dev[j];
1739                         if (i < nphys_disk)
1740                                 qdepth = min(h->nr_cmds, qdepth +
1741                                     logical_drive->phys_disk[i]->queue_depth);
1742                         break;
1743                 }
1744
1745                 /*
1746                  * This can happen if a physical drive is removed and
1747                  * the logical drive is degraded.  In that case, the RAID
1748                  * map data will refer to a physical disk which isn't actually
1749                  * present.  And in that case offload_enabled should already
1750                  * be 0, but we'll turn it off here just in case
1751                  */
1752                 if (!logical_drive->phys_disk[i]) {
1753                         dev_warn(&h->pdev->dev,
1754                                 "%s: [%d:%d:%d:%d] A phys disk component of LV is missing, turning off offload_enabled for LV.\n",
1755                                 __func__,
1756                                 h->scsi_host->host_no, logical_drive->bus,
1757                                 logical_drive->target, logical_drive->lun);
1758                         hpsa_turn_off_ioaccel_for_device(logical_drive);
1759                         logical_drive->queue_depth = 8;
1760                 }
1761         }
1762         if (nraid_map_entries)
1763                 /*
1764                  * This is correct for reads, too high for full stripe writes,
1765                  * way too high for partial stripe writes
1766                  */
1767                 logical_drive->queue_depth = qdepth;
1768         else {
1769                 if (logical_drive->external)
1770                         logical_drive->queue_depth = EXTERNAL_QD;
1771                 else
1772                         logical_drive->queue_depth = h->nr_cmds;
1773         }
1774 }
1775
1776 static void hpsa_update_log_drive_phys_drive_ptrs(struct ctlr_info *h,
1777                                 struct hpsa_scsi_dev_t *dev[], int ndevices)
1778 {
1779         int i;
1780
1781         for (i = 0; i < ndevices; i++) {
1782                 if (dev[i] == NULL)
1783                         continue;
1784                 if (dev[i]->devtype != TYPE_DISK &&
1785                     dev[i]->devtype != TYPE_ZBC)
1786                         continue;
1787                 if (!is_logical_device(dev[i]))
1788                         continue;
1789
1790                 /*
1791                  * If offload is currently enabled, the RAID map and
1792                  * phys_disk[] assignment *better* not be changing
1793                  * because we would be changing ioaccel phsy_disk[] pointers
1794                  * on a ioaccel volume processing I/O requests.
1795                  *
1796                  * If an ioaccel volume status changed, initially because it was
1797                  * re-configured and thus underwent a transformation, or
1798                  * a drive failed, we would have received a state change
1799                  * request and ioaccel should have been turned off. When the
1800                  * transformation completes, we get another state change
1801                  * request to turn ioaccel back on. In this case, we need
1802                  * to update the ioaccel information.
1803                  *
1804                  * Thus: If it is not currently enabled, but will be after
1805                  * the scan completes, make sure the ioaccel pointers
1806                  * are up to date.
1807                  */
1808
1809                 if (!dev[i]->offload_enabled && dev[i]->offload_to_be_enabled)
1810                         hpsa_figure_phys_disk_ptrs(h, dev, ndevices, dev[i]);
1811         }
1812 }
1813
1814 static int hpsa_add_device(struct ctlr_info *h, struct hpsa_scsi_dev_t *device)
1815 {
1816         int rc = 0;
1817
1818         if (!h->scsi_host)
1819                 return 1;
1820
1821         if (is_logical_device(device)) /* RAID */
1822                 rc = scsi_add_device(h->scsi_host, device->bus,
1823                                         device->target, device->lun);
1824         else /* HBA */
1825                 rc = hpsa_add_sas_device(h->sas_host, device);
1826
1827         return rc;
1828 }
1829
1830 static int hpsa_find_outstanding_commands_for_dev(struct ctlr_info *h,
1831                                                 struct hpsa_scsi_dev_t *dev)
1832 {
1833         int i;
1834         int count = 0;
1835
1836         for (i = 0; i < h->nr_cmds; i++) {
1837                 struct CommandList *c = h->cmd_pool + i;
1838                 int refcount = atomic_inc_return(&c->refcount);
1839
1840                 if (refcount > 1 && hpsa_cmd_dev_match(h, c, dev,
1841                                 dev->scsi3addr)) {
1842                         unsigned long flags;
1843
1844                         spin_lock_irqsave(&h->lock, flags);     /* Implied MB */
1845                         if (!hpsa_is_cmd_idle(c))
1846                                 ++count;
1847                         spin_unlock_irqrestore(&h->lock, flags);
1848                 }
1849
1850                 cmd_free(h, c);
1851         }
1852
1853         return count;
1854 }
1855
1856 #define NUM_WAIT 20
1857 static void hpsa_wait_for_outstanding_commands_for_dev(struct ctlr_info *h,
1858                                                 struct hpsa_scsi_dev_t *device)
1859 {
1860         int cmds = 0;
1861         int waits = 0;
1862         int num_wait = NUM_WAIT;
1863
1864         if (device->external)
1865                 num_wait = HPSA_EH_PTRAID_TIMEOUT;
1866
1867         while (1) {
1868                 cmds = hpsa_find_outstanding_commands_for_dev(h, device);
1869                 if (cmds == 0)
1870                         break;
1871                 if (++waits > num_wait)
1872                         break;
1873                 msleep(1000);
1874         }
1875
1876         if (waits > num_wait) {
1877                 dev_warn(&h->pdev->dev,
1878                         "%s: removing device [%d:%d:%d:%d] with %d outstanding commands!\n",
1879                         __func__,
1880                         h->scsi_host->host_no,
1881                         device->bus, device->target, device->lun, cmds);
1882         }
1883 }
1884
1885 static void hpsa_remove_device(struct ctlr_info *h,
1886                         struct hpsa_scsi_dev_t *device)
1887 {
1888         struct scsi_device *sdev = NULL;
1889
1890         if (!h->scsi_host)
1891                 return;
1892
1893         /*
1894          * Allow for commands to drain
1895          */
1896         device->removed = 1;
1897         hpsa_wait_for_outstanding_commands_for_dev(h, device);
1898
1899         if (is_logical_device(device)) { /* RAID */
1900                 sdev = scsi_device_lookup(h->scsi_host, device->bus,
1901                                                 device->target, device->lun);
1902                 if (sdev) {
1903                         scsi_remove_device(sdev);
1904                         scsi_device_put(sdev);
1905                 } else {
1906                         /*
1907                          * We don't expect to get here.  Future commands
1908                          * to this device will get a selection timeout as
1909                          * if the device were gone.
1910                          */
1911                         hpsa_show_dev_msg(KERN_WARNING, h, device,
1912                                         "didn't find device for removal.");
1913                 }
1914         } else { /* HBA */
1915
1916                 hpsa_remove_sas_device(device);
1917         }
1918 }
1919
1920 static void adjust_hpsa_scsi_table(struct ctlr_info *h,
1921         struct hpsa_scsi_dev_t *sd[], int nsds)
1922 {
1923         /* sd contains scsi3 addresses and devtypes, and inquiry
1924          * data.  This function takes what's in sd to be the current
1925          * reality and updates h->dev[] to reflect that reality.
1926          */
1927         int i, entry, device_change, changes = 0;
1928         struct hpsa_scsi_dev_t *csd;
1929         unsigned long flags;
1930         struct hpsa_scsi_dev_t **added, **removed;
1931         int nadded, nremoved;
1932
1933         /*
1934          * A reset can cause a device status to change
1935          * re-schedule the scan to see what happened.
1936          */
1937         spin_lock_irqsave(&h->reset_lock, flags);
1938         if (h->reset_in_progress) {
1939                 h->drv_req_rescan = 1;
1940                 spin_unlock_irqrestore(&h->reset_lock, flags);
1941                 return;
1942         }
1943         spin_unlock_irqrestore(&h->reset_lock, flags);
1944
1945         added = kcalloc(HPSA_MAX_DEVICES, sizeof(*added), GFP_KERNEL);
1946         removed = kcalloc(HPSA_MAX_DEVICES, sizeof(*removed), GFP_KERNEL);
1947
1948         if (!added || !removed) {
1949                 dev_warn(&h->pdev->dev, "out of memory in "
1950                         "adjust_hpsa_scsi_table\n");
1951                 goto free_and_out;
1952         }
1953
1954         spin_lock_irqsave(&h->devlock, flags);
1955
1956         /* find any devices in h->dev[] that are not in
1957          * sd[] and remove them from h->dev[], and for any
1958          * devices which have changed, remove the old device
1959          * info and add the new device info.
1960          * If minor device attributes change, just update
1961          * the existing device structure.
1962          */
1963         i = 0;
1964         nremoved = 0;
1965         nadded = 0;
1966         while (i < h->ndevices) {
1967                 csd = h->dev[i];
1968                 device_change = hpsa_scsi_find_entry(csd, sd, nsds, &entry);
1969                 if (device_change == DEVICE_NOT_FOUND) {
1970                         changes++;
1971                         hpsa_scsi_remove_entry(h, i, removed, &nremoved);
1972                         continue; /* remove ^^^, hence i not incremented */
1973                 } else if (device_change == DEVICE_CHANGED) {
1974                         changes++;
1975                         hpsa_scsi_replace_entry(h, i, sd[entry],
1976                                 added, &nadded, removed, &nremoved);
1977                         /* Set it to NULL to prevent it from being freed
1978                          * at the bottom of hpsa_update_scsi_devices()
1979                          */
1980                         sd[entry] = NULL;
1981                 } else if (device_change == DEVICE_UPDATED) {
1982                         hpsa_scsi_update_entry(h, i, sd[entry]);
1983                 }
1984                 i++;
1985         }
1986
1987         /* Now, make sure every device listed in sd[] is also
1988          * listed in h->dev[], adding them if they aren't found
1989          */
1990
1991         for (i = 0; i < nsds; i++) {
1992                 if (!sd[i]) /* if already added above. */
1993                         continue;
1994
1995                 /* Don't add devices which are NOT READY, FORMAT IN PROGRESS
1996                  * as the SCSI mid-layer does not handle such devices well.
1997                  * It relentlessly loops sending TUR at 3Hz, then READ(10)
1998                  * at 160Hz, and prevents the system from coming up.
1999                  */
2000                 if (sd[i]->volume_offline) {
2001                         hpsa_show_volume_status(h, sd[i]);
2002                         hpsa_show_dev_msg(KERN_INFO, h, sd[i], "offline");
2003                         continue;
2004                 }
2005
2006                 device_change = hpsa_scsi_find_entry(sd[i], h->dev,
2007                                         h->ndevices, &entry);
2008                 if (device_change == DEVICE_NOT_FOUND) {
2009                         changes++;
2010                         if (hpsa_scsi_add_entry(h, sd[i], added, &nadded) != 0)
2011                                 break;
2012                         sd[i] = NULL; /* prevent from being freed later. */
2013                 } else if (device_change == DEVICE_CHANGED) {
2014                         /* should never happen... */
2015                         changes++;
2016                         dev_warn(&h->pdev->dev,
2017                                 "device unexpectedly changed.\n");
2018                         /* but if it does happen, we just ignore that device */
2019                 }
2020         }
2021         hpsa_update_log_drive_phys_drive_ptrs(h, h->dev, h->ndevices);
2022
2023         /*
2024          * Now that h->dev[]->phys_disk[] is coherent, we can enable
2025          * any logical drives that need it enabled.
2026          *
2027          * The raid map should be current by now.
2028          *
2029          * We are updating the device list used for I/O requests.
2030          */
2031         for (i = 0; i < h->ndevices; i++) {
2032                 if (h->dev[i] == NULL)
2033                         continue;
2034                 h->dev[i]->offload_enabled = h->dev[i]->offload_to_be_enabled;
2035         }
2036
2037         spin_unlock_irqrestore(&h->devlock, flags);
2038
2039         /* Monitor devices which are in one of several NOT READY states to be
2040          * brought online later. This must be done without holding h->devlock,
2041          * so don't touch h->dev[]
2042          */
2043         for (i = 0; i < nsds; i++) {
2044                 if (!sd[i]) /* if already added above. */
2045                         continue;
2046                 if (sd[i]->volume_offline)
2047                         hpsa_monitor_offline_device(h, sd[i]->scsi3addr);
2048         }
2049
2050         /* Don't notify scsi mid layer of any changes the first time through
2051          * (or if there are no changes) scsi_scan_host will do it later the
2052          * first time through.
2053          */
2054         if (!changes)
2055                 goto free_and_out;
2056
2057         /* Notify scsi mid layer of any removed devices */
2058         for (i = 0; i < nremoved; i++) {
2059                 if (removed[i] == NULL)
2060                         continue;
2061                 if (removed[i]->expose_device)
2062                         hpsa_remove_device(h, removed[i]);
2063                 kfree(removed[i]);
2064                 removed[i] = NULL;
2065         }
2066
2067         /* Notify scsi mid layer of any added devices */
2068         for (i = 0; i < nadded; i++) {
2069                 int rc = 0;
2070
2071                 if (added[i] == NULL)
2072                         continue;
2073                 if (!(added[i]->expose_device))
2074                         continue;
2075                 rc = hpsa_add_device(h, added[i]);
2076                 if (!rc)
2077                         continue;
2078                 dev_warn(&h->pdev->dev,
2079                         "addition failed %d, device not added.", rc);
2080                 /* now we have to remove it from h->dev,
2081                  * since it didn't get added to scsi mid layer
2082                  */
2083                 fixup_botched_add(h, added[i]);
2084                 h->drv_req_rescan = 1;
2085         }
2086
2087 free_and_out:
2088         kfree(added);
2089         kfree(removed);
2090 }
2091
2092 /*
2093  * Lookup bus/target/lun and return corresponding struct hpsa_scsi_dev_t *
2094  * Assume's h->devlock is held.
2095  */
2096 static struct hpsa_scsi_dev_t *lookup_hpsa_scsi_dev(struct ctlr_info *h,
2097         int bus, int target, int lun)
2098 {
2099         int i;
2100         struct hpsa_scsi_dev_t *sd;
2101
2102         for (i = 0; i < h->ndevices; i++) {
2103                 sd = h->dev[i];
2104                 if (sd->bus == bus && sd->target == target && sd->lun == lun)
2105                         return sd;
2106         }
2107         return NULL;
2108 }
2109
2110 static int hpsa_slave_alloc(struct scsi_device *sdev)
2111 {
2112         struct hpsa_scsi_dev_t *sd = NULL;
2113         unsigned long flags;
2114         struct ctlr_info *h;
2115
2116         h = sdev_to_hba(sdev);
2117         spin_lock_irqsave(&h->devlock, flags);
2118         if (sdev_channel(sdev) == HPSA_PHYSICAL_DEVICE_BUS) {
2119                 struct scsi_target *starget;
2120                 struct sas_rphy *rphy;
2121
2122                 starget = scsi_target(sdev);
2123                 rphy = target_to_rphy(starget);
2124                 sd = hpsa_find_device_by_sas_rphy(h, rphy);
2125                 if (sd) {
2126                         sd->target = sdev_id(sdev);
2127                         sd->lun = sdev->lun;
2128                 }
2129         }
2130         if (!sd)
2131                 sd = lookup_hpsa_scsi_dev(h, sdev_channel(sdev),
2132                                         sdev_id(sdev), sdev->lun);
2133
2134         if (sd && sd->expose_device) {
2135                 atomic_set(&sd->ioaccel_cmds_out, 0);
2136                 sdev->hostdata = sd;
2137         } else
2138                 sdev->hostdata = NULL;
2139         spin_unlock_irqrestore(&h->devlock, flags);
2140         return 0;
2141 }
2142
2143 /* configure scsi device based on internal per-device structure */
2144 #define CTLR_TIMEOUT (120 * HZ)
2145 static int hpsa_slave_configure(struct scsi_device *sdev)
2146 {
2147         struct hpsa_scsi_dev_t *sd;
2148         int queue_depth;
2149
2150         sd = sdev->hostdata;
2151         sdev->no_uld_attach = !sd || !sd->expose_device;
2152
2153         if (sd) {
2154                 sd->was_removed = 0;
2155                 queue_depth = sd->queue_depth != 0 ?
2156                                 sd->queue_depth : sdev->host->can_queue;
2157                 if (sd->external) {
2158                         queue_depth = EXTERNAL_QD;
2159                         sdev->eh_timeout = HPSA_EH_PTRAID_TIMEOUT;
2160                         blk_queue_rq_timeout(sdev->request_queue,
2161                                                 HPSA_EH_PTRAID_TIMEOUT);
2162                 }
2163                 if (is_hba_lunid(sd->scsi3addr)) {
2164                         sdev->eh_timeout = CTLR_TIMEOUT;
2165                         blk_queue_rq_timeout(sdev->request_queue, CTLR_TIMEOUT);
2166                 }
2167         } else {
2168                 queue_depth = sdev->host->can_queue;
2169         }
2170
2171         scsi_change_queue_depth(sdev, queue_depth);
2172
2173         return 0;
2174 }
2175
2176 static void hpsa_slave_destroy(struct scsi_device *sdev)
2177 {
2178         struct hpsa_scsi_dev_t *hdev = NULL;
2179
2180         hdev = sdev->hostdata;
2181
2182         if (hdev)
2183                 hdev->was_removed = 1;
2184 }
2185
2186 static void hpsa_free_ioaccel2_sg_chain_blocks(struct ctlr_info *h)
2187 {
2188         int i;
2189
2190         if (!h->ioaccel2_cmd_sg_list)
2191                 return;
2192         for (i = 0; i < h->nr_cmds; i++) {
2193                 kfree(h->ioaccel2_cmd_sg_list[i]);
2194                 h->ioaccel2_cmd_sg_list[i] = NULL;
2195         }
2196         kfree(h->ioaccel2_cmd_sg_list);
2197         h->ioaccel2_cmd_sg_list = NULL;
2198 }
2199
2200 static int hpsa_allocate_ioaccel2_sg_chain_blocks(struct ctlr_info *h)
2201 {
2202         int i;
2203
2204         if (h->chainsize <= 0)
2205                 return 0;
2206
2207         h->ioaccel2_cmd_sg_list =
2208                 kcalloc(h->nr_cmds, sizeof(*h->ioaccel2_cmd_sg_list),
2209                                         GFP_KERNEL);
2210         if (!h->ioaccel2_cmd_sg_list)
2211                 return -ENOMEM;
2212         for (i = 0; i < h->nr_cmds; i++) {
2213                 h->ioaccel2_cmd_sg_list[i] =
2214                         kmalloc_array(h->maxsgentries,
2215                                       sizeof(*h->ioaccel2_cmd_sg_list[i]),
2216                                       GFP_KERNEL);
2217                 if (!h->ioaccel2_cmd_sg_list[i])
2218                         goto clean;
2219         }
2220         return 0;
2221
2222 clean:
2223         hpsa_free_ioaccel2_sg_chain_blocks(h);
2224         return -ENOMEM;
2225 }
2226
2227 static void hpsa_free_sg_chain_blocks(struct ctlr_info *h)
2228 {
2229         int i;
2230
2231         if (!h->cmd_sg_list)
2232                 return;
2233         for (i = 0; i < h->nr_cmds; i++) {
2234                 kfree(h->cmd_sg_list[i]);
2235                 h->cmd_sg_list[i] = NULL;
2236         }
2237         kfree(h->cmd_sg_list);
2238         h->cmd_sg_list = NULL;
2239 }
2240
2241 static int hpsa_alloc_sg_chain_blocks(struct ctlr_info *h)
2242 {
2243         int i;
2244
2245         if (h->chainsize <= 0)
2246                 return 0;
2247
2248         h->cmd_sg_list = kcalloc(h->nr_cmds, sizeof(*h->cmd_sg_list),
2249                                  GFP_KERNEL);
2250         if (!h->cmd_sg_list)
2251                 return -ENOMEM;
2252
2253         for (i = 0; i < h->nr_cmds; i++) {
2254                 h->cmd_sg_list[i] = kmalloc_array(h->chainsize,
2255                                                   sizeof(*h->cmd_sg_list[i]),
2256                                                   GFP_KERNEL);
2257                 if (!h->cmd_sg_list[i])
2258                         goto clean;
2259
2260         }
2261         return 0;
2262
2263 clean:
2264         hpsa_free_sg_chain_blocks(h);
2265         return -ENOMEM;
2266 }
2267
2268 static int hpsa_map_ioaccel2_sg_chain_block(struct ctlr_info *h,
2269         struct io_accel2_cmd *cp, struct CommandList *c)
2270 {
2271         struct ioaccel2_sg_element *chain_block;
2272         u64 temp64;
2273         u32 chain_size;
2274
2275         chain_block = h->ioaccel2_cmd_sg_list[c->cmdindex];
2276         chain_size = le32_to_cpu(cp->sg[0].length);
2277         temp64 = dma_map_single(&h->pdev->dev, chain_block, chain_size,
2278                                 DMA_TO_DEVICE);
2279         if (dma_mapping_error(&h->pdev->dev, temp64)) {
2280                 /* prevent subsequent unmapping */
2281                 cp->sg->address = 0;
2282                 return -1;
2283         }
2284         cp->sg->address = cpu_to_le64(temp64);
2285         return 0;
2286 }
2287
2288 static void hpsa_unmap_ioaccel2_sg_chain_block(struct ctlr_info *h,
2289         struct io_accel2_cmd *cp)
2290 {
2291         struct ioaccel2_sg_element *chain_sg;
2292         u64 temp64;
2293         u32 chain_size;
2294
2295         chain_sg = cp->sg;
2296         temp64 = le64_to_cpu(chain_sg->address);
2297         chain_size = le32_to_cpu(cp->sg[0].length);
2298         dma_unmap_single(&h->pdev->dev, temp64, chain_size, DMA_TO_DEVICE);
2299 }
2300
2301 static int hpsa_map_sg_chain_block(struct ctlr_info *h,
2302         struct CommandList *c)
2303 {
2304         struct SGDescriptor *chain_sg, *chain_block;
2305         u64 temp64;
2306         u32 chain_len;
2307
2308         chain_sg = &c->SG[h->max_cmd_sg_entries - 1];
2309         chain_block = h->cmd_sg_list[c->cmdindex];
2310         chain_sg->Ext = cpu_to_le32(HPSA_SG_CHAIN);
2311         chain_len = sizeof(*chain_sg) *
2312                 (le16_to_cpu(c->Header.SGTotal) - h->max_cmd_sg_entries);
2313         chain_sg->Len = cpu_to_le32(chain_len);
2314         temp64 = dma_map_single(&h->pdev->dev, chain_block, chain_len,
2315                                 DMA_TO_DEVICE);
2316         if (dma_mapping_error(&h->pdev->dev, temp64)) {
2317                 /* prevent subsequent unmapping */
2318                 chain_sg->Addr = cpu_to_le64(0);
2319                 return -1;
2320         }
2321         chain_sg->Addr = cpu_to_le64(temp64);
2322         return 0;
2323 }
2324
2325 static void hpsa_unmap_sg_chain_block(struct ctlr_info *h,
2326         struct CommandList *c)
2327 {
2328         struct SGDescriptor *chain_sg;
2329
2330         if (le16_to_cpu(c->Header.SGTotal) <= h->max_cmd_sg_entries)
2331                 return;
2332
2333         chain_sg = &c->SG[h->max_cmd_sg_entries - 1];
2334         dma_unmap_single(&h->pdev->dev, le64_to_cpu(chain_sg->Addr),
2335                         le32_to_cpu(chain_sg->Len), DMA_TO_DEVICE);
2336 }
2337
2338
2339 /* Decode the various types of errors on ioaccel2 path.
2340  * Return 1 for any error that should generate a RAID path retry.
2341  * Return 0 for errors that don't require a RAID path retry.
2342  */
2343 static int handle_ioaccel_mode2_error(struct ctlr_info *h,
2344                                         struct CommandList *c,
2345                                         struct scsi_cmnd *cmd,
2346                                         struct io_accel2_cmd *c2,
2347                                         struct hpsa_scsi_dev_t *dev)
2348 {
2349         int data_len;
2350         int retry = 0;
2351         u32 ioaccel2_resid = 0;
2352
2353         switch (c2->error_data.serv_response) {
2354         case IOACCEL2_SERV_RESPONSE_COMPLETE:
2355                 switch (c2->error_data.status) {
2356                 case IOACCEL2_STATUS_SR_TASK_COMP_GOOD:
2357                         if (cmd)
2358                                 cmd->result = 0;
2359                         break;
2360                 case IOACCEL2_STATUS_SR_TASK_COMP_CHK_COND:
2361                         cmd->result |= SAM_STAT_CHECK_CONDITION;
2362                         if (c2->error_data.data_present !=
2363                                         IOACCEL2_SENSE_DATA_PRESENT) {
2364                                 memset(cmd->sense_buffer, 0,
2365                                         SCSI_SENSE_BUFFERSIZE);
2366                                 break;
2367                         }
2368                         /* copy the sense data */
2369                         data_len = c2->error_data.sense_data_len;
2370                         if (data_len > SCSI_SENSE_BUFFERSIZE)
2371                                 data_len = SCSI_SENSE_BUFFERSIZE;
2372                         if (data_len > sizeof(c2->error_data.sense_data_buff))
2373                                 data_len =
2374                                         sizeof(c2->error_data.sense_data_buff);
2375                         memcpy(cmd->sense_buffer,
2376                                 c2->error_data.sense_data_buff, data_len);
2377                         retry = 1;
2378                         break;
2379                 case IOACCEL2_STATUS_SR_TASK_COMP_BUSY:
2380                         retry = 1;
2381                         break;
2382                 case IOACCEL2_STATUS_SR_TASK_COMP_RES_CON:
2383                         retry = 1;
2384                         break;
2385                 case IOACCEL2_STATUS_SR_TASK_COMP_SET_FULL:
2386                         retry = 1;
2387                         break;
2388                 case IOACCEL2_STATUS_SR_TASK_COMP_ABORTED:
2389                         retry = 1;
2390                         break;
2391                 default:
2392                         retry = 1;
2393                         break;
2394                 }
2395                 break;
2396         case IOACCEL2_SERV_RESPONSE_FAILURE:
2397                 switch (c2->error_data.status) {
2398                 case IOACCEL2_STATUS_SR_IO_ERROR:
2399                 case IOACCEL2_STATUS_SR_IO_ABORTED:
2400                 case IOACCEL2_STATUS_SR_OVERRUN:
2401                         retry = 1;
2402                         break;
2403                 case IOACCEL2_STATUS_SR_UNDERRUN:
2404                         cmd->result = (DID_OK << 16);           /* host byte */
2405                         ioaccel2_resid = get_unaligned_le32(
2406                                                 &c2->error_data.resid_cnt[0]);
2407                         scsi_set_resid(cmd, ioaccel2_resid);
2408                         break;
2409                 case IOACCEL2_STATUS_SR_NO_PATH_TO_DEVICE:
2410                 case IOACCEL2_STATUS_SR_INVALID_DEVICE:
2411                 case IOACCEL2_STATUS_SR_IOACCEL_DISABLED:
2412                         /*
2413                          * Did an HBA disk disappear? We will eventually
2414                          * get a state change event from the controller but
2415                          * in the meantime, we need to tell the OS that the
2416                          * HBA disk is no longer there and stop I/O
2417                          * from going down. This allows the potential re-insert
2418                          * of the disk to get the same device node.
2419                          */
2420                         if (dev->physical_device && dev->expose_device) {
2421                                 cmd->result = DID_NO_CONNECT << 16;
2422                                 dev->removed = 1;
2423                                 h->drv_req_rescan = 1;
2424                                 dev_warn(&h->pdev->dev,
2425                                         "%s: device is gone!\n", __func__);
2426                         } else
2427                                 /*
2428                                  * Retry by sending down the RAID path.
2429                                  * We will get an event from ctlr to
2430                                  * trigger rescan regardless.
2431                                  */
2432                                 retry = 1;
2433                         break;
2434                 default:
2435                         retry = 1;
2436                 }
2437                 break;
2438         case IOACCEL2_SERV_RESPONSE_TMF_COMPLETE:
2439                 break;
2440         case IOACCEL2_SERV_RESPONSE_TMF_SUCCESS:
2441                 break;
2442         case IOACCEL2_SERV_RESPONSE_TMF_REJECTED:
2443                 retry = 1;
2444                 break;
2445         case IOACCEL2_SERV_RESPONSE_TMF_WRONG_LUN:
2446                 break;
2447         default:
2448                 retry = 1;
2449                 break;
2450         }
2451
2452         if (dev->in_reset)
2453                 retry = 0;
2454
2455         return retry;   /* retry on raid path? */
2456 }
2457
2458 static void hpsa_cmd_resolve_events(struct ctlr_info *h,
2459                 struct CommandList *c)
2460 {
2461         struct hpsa_scsi_dev_t *dev = c->device;
2462
2463         /*
2464          * Reset c->scsi_cmd here so that the reset handler will know
2465          * this command has completed.  Then, check to see if the handler is
2466          * waiting for this command, and, if so, wake it.
2467          */
2468         c->scsi_cmd = SCSI_CMD_IDLE;
2469         mb();   /* Declare command idle before checking for pending events. */
2470         if (dev) {
2471                 atomic_dec(&dev->commands_outstanding);
2472                 if (dev->in_reset &&
2473                         atomic_read(&dev->commands_outstanding) <= 0)
2474                         wake_up_all(&h->event_sync_wait_queue);
2475         }
2476 }
2477
2478 static void hpsa_cmd_resolve_and_free(struct ctlr_info *h,
2479                                       struct CommandList *c)
2480 {
2481         hpsa_cmd_resolve_events(h, c);
2482         cmd_tagged_free(h, c);
2483 }
2484
2485 static void hpsa_cmd_free_and_done(struct ctlr_info *h,
2486                 struct CommandList *c, struct scsi_cmnd *cmd)
2487 {
2488         hpsa_cmd_resolve_and_free(h, c);
2489         if (cmd)
2490                 scsi_done(cmd);
2491 }
2492
2493 static void hpsa_retry_cmd(struct ctlr_info *h, struct CommandList *c)
2494 {
2495         INIT_WORK(&c->work, hpsa_command_resubmit_worker);
2496         queue_work_on(raw_smp_processor_id(), h->resubmit_wq, &c->work);
2497 }
2498
2499 static void process_ioaccel2_completion(struct ctlr_info *h,
2500                 struct CommandList *c, struct scsi_cmnd *cmd,
2501                 struct hpsa_scsi_dev_t *dev)
2502 {
2503         struct io_accel2_cmd *c2 = &h->ioaccel2_cmd_pool[c->cmdindex];
2504
2505         /* check for good status */
2506         if (likely(c2->error_data.serv_response == 0 &&
2507                         c2->error_data.status == 0)) {
2508                 cmd->result = 0;
2509                 return hpsa_cmd_free_and_done(h, c, cmd);
2510         }
2511
2512         /*
2513          * Any RAID offload error results in retry which will use
2514          * the normal I/O path so the controller can handle whatever is
2515          * wrong.
2516          */
2517         if (is_logical_device(dev) &&
2518                 c2->error_data.serv_response ==
2519                         IOACCEL2_SERV_RESPONSE_FAILURE) {
2520                 if (c2->error_data.status ==
2521                         IOACCEL2_STATUS_SR_IOACCEL_DISABLED) {
2522                         hpsa_turn_off_ioaccel_for_device(dev);
2523                 }
2524
2525                 if (dev->in_reset) {
2526                         cmd->result = DID_RESET << 16;
2527                         return hpsa_cmd_free_and_done(h, c, cmd);
2528                 }
2529
2530                 return hpsa_retry_cmd(h, c);
2531         }
2532
2533         if (handle_ioaccel_mode2_error(h, c, cmd, c2, dev))
2534                 return hpsa_retry_cmd(h, c);
2535
2536         return hpsa_cmd_free_and_done(h, c, cmd);
2537 }
2538
2539 /* Returns 0 on success, < 0 otherwise. */
2540 static int hpsa_evaluate_tmf_status(struct ctlr_info *h,
2541                                         struct CommandList *cp)
2542 {
2543         u8 tmf_status = cp->err_info->ScsiStatus;
2544
2545         switch (tmf_status) {
2546         case CISS_TMF_COMPLETE:
2547                 /*
2548                  * CISS_TMF_COMPLETE never happens, instead,
2549                  * ei->CommandStatus == 0 for this case.
2550                  */
2551         case CISS_TMF_SUCCESS:
2552                 return 0;
2553         case CISS_TMF_INVALID_FRAME:
2554         case CISS_TMF_NOT_SUPPORTED:
2555         case CISS_TMF_FAILED:
2556         case CISS_TMF_WRONG_LUN:
2557         case CISS_TMF_OVERLAPPED_TAG:
2558                 break;
2559         default:
2560                 dev_warn(&h->pdev->dev, "Unknown TMF status: 0x%02x\n",
2561                                 tmf_status);
2562                 break;
2563         }
2564         return -tmf_status;
2565 }
2566
2567 static void complete_scsi_command(struct CommandList *cp)
2568 {
2569         struct scsi_cmnd *cmd;
2570         struct ctlr_info *h;
2571         struct ErrorInfo *ei;
2572         struct hpsa_scsi_dev_t *dev;
2573         struct io_accel2_cmd *c2;
2574
2575         u8 sense_key;
2576         u8 asc;      /* additional sense code */
2577         u8 ascq;     /* additional sense code qualifier */
2578         unsigned long sense_data_size;
2579
2580         ei = cp->err_info;
2581         cmd = cp->scsi_cmd;
2582         h = cp->h;
2583
2584         if (!cmd->device) {
2585                 cmd->result = DID_NO_CONNECT << 16;
2586                 return hpsa_cmd_free_and_done(h, cp, cmd);
2587         }
2588
2589         dev = cmd->device->hostdata;
2590         if (!dev) {
2591                 cmd->result = DID_NO_CONNECT << 16;
2592                 return hpsa_cmd_free_and_done(h, cp, cmd);
2593         }
2594         c2 = &h->ioaccel2_cmd_pool[cp->cmdindex];
2595
2596         scsi_dma_unmap(cmd); /* undo the DMA mappings */
2597         if ((cp->cmd_type == CMD_SCSI) &&
2598                 (le16_to_cpu(cp->Header.SGTotal) > h->max_cmd_sg_entries))
2599                 hpsa_unmap_sg_chain_block(h, cp);
2600
2601         if ((cp->cmd_type == CMD_IOACCEL2) &&
2602                 (c2->sg[0].chain_indicator == IOACCEL2_CHAIN))
2603                 hpsa_unmap_ioaccel2_sg_chain_block(h, c2);
2604
2605         cmd->result = (DID_OK << 16);           /* host byte */
2606
2607         /* SCSI command has already been cleaned up in SML */
2608         if (dev->was_removed) {
2609                 hpsa_cmd_resolve_and_free(h, cp);
2610                 return;
2611         }
2612
2613         if (cp->cmd_type == CMD_IOACCEL2 || cp->cmd_type == CMD_IOACCEL1) {
2614                 if (dev->physical_device && dev->expose_device &&
2615                         dev->removed) {
2616                         cmd->result = DID_NO_CONNECT << 16;
2617                         return hpsa_cmd_free_and_done(h, cp, cmd);
2618                 }
2619                 if (likely(cp->phys_disk != NULL))
2620                         atomic_dec(&cp->phys_disk->ioaccel_cmds_out);
2621         }
2622
2623         /*
2624          * We check for lockup status here as it may be set for
2625          * CMD_SCSI, CMD_IOACCEL1 and CMD_IOACCEL2 commands by
2626          * fail_all_oustanding_cmds()
2627          */
2628         if (unlikely(ei->CommandStatus == CMD_CTLR_LOCKUP)) {
2629                 /* DID_NO_CONNECT will prevent a retry */
2630                 cmd->result = DID_NO_CONNECT << 16;
2631                 return hpsa_cmd_free_and_done(h, cp, cmd);
2632         }
2633
2634         if (cp->cmd_type == CMD_IOACCEL2)
2635                 return process_ioaccel2_completion(h, cp, cmd, dev);
2636
2637         scsi_set_resid(cmd, ei->ResidualCnt);
2638         if (ei->CommandStatus == 0)
2639                 return hpsa_cmd_free_and_done(h, cp, cmd);
2640
2641         /* For I/O accelerator commands, copy over some fields to the normal
2642          * CISS header used below for error handling.
2643          */
2644         if (cp->cmd_type == CMD_IOACCEL1) {
2645                 struct io_accel1_cmd *c = &h->ioaccel_cmd_pool[cp->cmdindex];
2646                 cp->Header.SGList = scsi_sg_count(cmd);
2647                 cp->Header.SGTotal = cpu_to_le16(cp->Header.SGList);
2648                 cp->Request.CDBLen = le16_to_cpu(c->io_flags) &
2649                         IOACCEL1_IOFLAGS_CDBLEN_MASK;
2650                 cp->Header.tag = c->tag;
2651                 memcpy(cp->Header.LUN.LunAddrBytes, c->CISS_LUN, 8);
2652                 memcpy(cp->Request.CDB, c->CDB, cp->Request.CDBLen);
2653
2654                 /* Any RAID offload error results in retry which will use
2655                  * the normal I/O path so the controller can handle whatever's
2656                  * wrong.
2657                  */
2658                 if (is_logical_device(dev)) {
2659                         if (ei->CommandStatus == CMD_IOACCEL_DISABLED)
2660                                 dev->offload_enabled = 0;
2661                         return hpsa_retry_cmd(h, cp);
2662                 }
2663         }
2664
2665         /* an error has occurred */
2666         switch (ei->CommandStatus) {
2667
2668         case CMD_TARGET_STATUS:
2669                 cmd->result |= ei->ScsiStatus;
2670                 /* copy the sense data */
2671                 if (SCSI_SENSE_BUFFERSIZE < sizeof(ei->SenseInfo))
2672                         sense_data_size = SCSI_SENSE_BUFFERSIZE;
2673                 else
2674                         sense_data_size = sizeof(ei->SenseInfo);
2675                 if (ei->SenseLen < sense_data_size)
2676                         sense_data_size = ei->SenseLen;
2677                 memcpy(cmd->sense_buffer, ei->SenseInfo, sense_data_size);
2678                 if (ei->ScsiStatus)
2679                         decode_sense_data(ei->SenseInfo, sense_data_size,
2680                                 &sense_key, &asc, &ascq);
2681                 if (ei->ScsiStatus == SAM_STAT_CHECK_CONDITION) {
2682                         switch (sense_key) {
2683                         case ABORTED_COMMAND:
2684                                 cmd->result |= DID_SOFT_ERROR << 16;
2685                                 break;
2686                         case UNIT_ATTENTION:
2687                                 if (asc == 0x3F && ascq == 0x0E)
2688                                         h->drv_req_rescan = 1;
2689                                 break;
2690                         case ILLEGAL_REQUEST:
2691                                 if (asc == 0x25 && ascq == 0x00) {
2692                                         dev->removed = 1;
2693                                         cmd->result = DID_NO_CONNECT << 16;
2694                                 }
2695                                 break;
2696                         }
2697                         break;
2698                 }
2699                 /* Problem was not a check condition
2700                  * Pass it up to the upper layers...
2701                  */
2702                 if (ei->ScsiStatus) {
2703                         dev_warn(&h->pdev->dev, "cp %p has status 0x%x "
2704                                 "Sense: 0x%x, ASC: 0x%x, ASCQ: 0x%x, "
2705                                 "Returning result: 0x%x\n",
2706                                 cp, ei->ScsiStatus,
2707                                 sense_key, asc, ascq,
2708                                 cmd->result);
2709                 } else {  /* scsi status is zero??? How??? */
2710                         dev_warn(&h->pdev->dev, "cp %p SCSI status was 0. "
2711                                 "Returning no connection.\n", cp),
2712
2713                         /* Ordinarily, this case should never happen,
2714                          * but there is a bug in some released firmware
2715                          * revisions that allows it to happen if, for
2716                          * example, a 4100 backplane loses power and
2717                          * the tape drive is in it.  We assume that
2718                          * it's a fatal error of some kind because we
2719                          * can't show that it wasn't. We will make it
2720                          * look like selection timeout since that is
2721                          * the most common reason for this to occur,
2722                          * and it's severe enough.
2723                          */
2724
2725                         cmd->result = DID_NO_CONNECT << 16;
2726                 }
2727                 break;
2728
2729         case CMD_DATA_UNDERRUN: /* let mid layer handle it. */
2730                 break;
2731         case CMD_DATA_OVERRUN:
2732                 dev_warn(&h->pdev->dev,
2733                         "CDB %16phN data overrun\n", cp->Request.CDB);
2734                 break;
2735         case CMD_INVALID: {
2736                 /* print_bytes(cp, sizeof(*cp), 1, 0);
2737                 print_cmd(cp); */
2738                 /* We get CMD_INVALID if you address a non-existent device
2739                  * instead of a selection timeout (no response).  You will
2740                  * see this if you yank out a drive, then try to access it.
2741                  * This is kind of a shame because it means that any other
2742                  * CMD_INVALID (e.g. driver bug) will get interpreted as a
2743                  * missing target. */
2744                 cmd->result = DID_NO_CONNECT << 16;
2745         }
2746                 break;
2747         case CMD_PROTOCOL_ERR:
2748                 cmd->result = DID_ERROR << 16;
2749                 dev_warn(&h->pdev->dev, "CDB %16phN : protocol error\n",
2750                                 cp->Request.CDB);
2751                 break;
2752         case CMD_HARDWARE_ERR:
2753                 cmd->result = DID_ERROR << 16;
2754                 dev_warn(&h->pdev->dev, "CDB %16phN : hardware error\n",
2755                         cp->Request.CDB);
2756                 break;
2757         case CMD_CONNECTION_LOST:
2758                 cmd->result = DID_ERROR << 16;
2759                 dev_warn(&h->pdev->dev, "CDB %16phN : connection lost\n",
2760                         cp->Request.CDB);
2761                 break;
2762         case CMD_ABORTED:
2763                 cmd->result = DID_ABORT << 16;
2764                 break;
2765         case CMD_ABORT_FAILED:
2766                 cmd->result = DID_ERROR << 16;
2767                 dev_warn(&h->pdev->dev, "CDB %16phN : abort failed\n",
2768                         cp->Request.CDB);
2769                 break;
2770         case CMD_UNSOLICITED_ABORT:
2771                 cmd->result = DID_SOFT_ERROR << 16; /* retry the command */
2772                 dev_warn(&h->pdev->dev, "CDB %16phN : unsolicited abort\n",
2773                         cp->Request.CDB);
2774                 break;
2775         case CMD_TIMEOUT:
2776                 cmd->result = DID_TIME_OUT << 16;
2777                 dev_warn(&h->pdev->dev, "CDB %16phN timed out\n",
2778                         cp->Request.CDB);
2779                 break;
2780         case CMD_UNABORTABLE:
2781                 cmd->result = DID_ERROR << 16;
2782                 dev_warn(&h->pdev->dev, "Command unabortable\n");
2783                 break;
2784         case CMD_TMF_STATUS:
2785                 if (hpsa_evaluate_tmf_status(h, cp)) /* TMF failed? */
2786                         cmd->result = DID_ERROR << 16;
2787                 break;
2788         case CMD_IOACCEL_DISABLED:
2789                 /* This only handles the direct pass-through case since RAID
2790                  * offload is handled above.  Just attempt a retry.
2791                  */
2792                 cmd->result = DID_SOFT_ERROR << 16;
2793                 dev_warn(&h->pdev->dev,
2794                                 "cp %p had HP SSD Smart Path error\n", cp);
2795                 break;
2796         default:
2797                 cmd->result = DID_ERROR << 16;
2798                 dev_warn(&h->pdev->dev, "cp %p returned unknown status %x\n",
2799                                 cp, ei->CommandStatus);
2800         }
2801
2802         return hpsa_cmd_free_and_done(h, cp, cmd);
2803 }
2804
2805 static void hpsa_pci_unmap(struct pci_dev *pdev, struct CommandList *c,
2806                 int sg_used, enum dma_data_direction data_direction)
2807 {
2808         int i;
2809
2810         for (i = 0; i < sg_used; i++)
2811                 dma_unmap_single(&pdev->dev, le64_to_cpu(c->SG[i].Addr),
2812                                 le32_to_cpu(c->SG[i].Len),
2813                                 data_direction);
2814 }
2815
2816 static int hpsa_map_one(struct pci_dev *pdev,
2817                 struct CommandList *cp,
2818                 unsigned char *buf,
2819                 size_t buflen,
2820                 enum dma_data_direction data_direction)
2821 {
2822         u64 addr64;
2823
2824         if (buflen == 0 || data_direction == DMA_NONE) {
2825                 cp->Header.SGList = 0;
2826                 cp->Header.SGTotal = cpu_to_le16(0);
2827                 return 0;
2828         }
2829
2830         addr64 = dma_map_single(&pdev->dev, buf, buflen, data_direction);
2831         if (dma_mapping_error(&pdev->dev, addr64)) {
2832                 /* Prevent subsequent unmap of something never mapped */
2833                 cp->Header.SGList = 0;
2834                 cp->Header.SGTotal = cpu_to_le16(0);
2835                 return -1;
2836         }
2837         cp->SG[0].Addr = cpu_to_le64(addr64);
2838         cp->SG[0].Len = cpu_to_le32(buflen);
2839         cp->SG[0].Ext = cpu_to_le32(HPSA_SG_LAST); /* we are not chaining */
2840         cp->Header.SGList = 1;   /* no. SGs contig in this cmd */
2841         cp->Header.SGTotal = cpu_to_le16(1); /* total sgs in cmd list */
2842         return 0;
2843 }
2844
2845 #define NO_TIMEOUT ((unsigned long) -1)
2846 #define DEFAULT_TIMEOUT 30000 /* milliseconds */
2847 static int hpsa_scsi_do_simple_cmd_core(struct ctlr_info *h,
2848         struct CommandList *c, int reply_queue, unsigned long timeout_msecs)
2849 {
2850         DECLARE_COMPLETION_ONSTACK(wait);
2851
2852         c->waiting = &wait;
2853         __enqueue_cmd_and_start_io(h, c, reply_queue);
2854         if (timeout_msecs == NO_TIMEOUT) {
2855                 /* TODO: get rid of this no-timeout thing */
2856                 wait_for_completion_io(&wait);
2857                 return IO_OK;
2858         }
2859         if (!wait_for_completion_io_timeout(&wait,
2860                                         msecs_to_jiffies(timeout_msecs))) {
2861                 dev_warn(&h->pdev->dev, "Command timed out.\n");
2862                 return -ETIMEDOUT;
2863         }
2864         return IO_OK;
2865 }
2866
2867 static int hpsa_scsi_do_simple_cmd(struct ctlr_info *h, struct CommandList *c,
2868                                    int reply_queue, unsigned long timeout_msecs)
2869 {
2870         if (unlikely(lockup_detected(h))) {
2871                 c->err_info->CommandStatus = CMD_CTLR_LOCKUP;
2872                 return IO_OK;
2873         }
2874         return hpsa_scsi_do_simple_cmd_core(h, c, reply_queue, timeout_msecs);
2875 }
2876
2877 static u32 lockup_detected(struct ctlr_info *h)
2878 {
2879         int cpu;
2880         u32 rc, *lockup_detected;
2881
2882         cpu = get_cpu();
2883         lockup_detected = per_cpu_ptr(h->lockup_detected, cpu);
2884         rc = *lockup_detected;
2885         put_cpu();
2886         return rc;
2887 }
2888
2889 #define MAX_DRIVER_CMD_RETRIES 25
2890 static int hpsa_scsi_do_simple_cmd_with_retry(struct ctlr_info *h,
2891                 struct CommandList *c, enum dma_data_direction data_direction,
2892                 unsigned long timeout_msecs)
2893 {
2894         int backoff_time = 10, retry_count = 0;
2895         int rc;
2896
2897         do {
2898                 memset(c->err_info, 0, sizeof(*c->err_info));
2899                 rc = hpsa_scsi_do_simple_cmd(h, c, DEFAULT_REPLY_QUEUE,
2900                                                   timeout_msecs);
2901                 if (rc)
2902                         break;
2903                 retry_count++;
2904                 if (retry_count > 3) {
2905                         msleep(backoff_time);
2906                         if (backoff_time < 1000)
2907                                 backoff_time *= 2;
2908                 }
2909         } while ((check_for_unit_attention(h, c) ||
2910                         check_for_busy(h, c)) &&
2911                         retry_count <= MAX_DRIVER_CMD_RETRIES);
2912         hpsa_pci_unmap(h->pdev, c, 1, data_direction);
2913         if (retry_count > MAX_DRIVER_CMD_RETRIES)
2914                 rc = -EIO;
2915         return rc;
2916 }
2917
2918 static void hpsa_print_cmd(struct ctlr_info *h, char *txt,
2919                                 struct CommandList *c)
2920 {
2921         const u8 *cdb = c->Request.CDB;
2922         const u8 *lun = c->Header.LUN.LunAddrBytes;
2923
2924         dev_warn(&h->pdev->dev, "%s: LUN:%8phN CDB:%16phN\n",
2925                  txt, lun, cdb);
2926 }
2927
2928 static void hpsa_scsi_interpret_error(struct ctlr_info *h,
2929                         struct CommandList *cp)
2930 {
2931         const struct ErrorInfo *ei = cp->err_info;
2932         struct device *d = &cp->h->pdev->dev;
2933         u8 sense_key, asc, ascq;
2934         int sense_len;
2935
2936         switch (ei->CommandStatus) {
2937         case CMD_TARGET_STATUS:
2938                 if (ei->SenseLen > sizeof(ei->SenseInfo))
2939                         sense_len = sizeof(ei->SenseInfo);
2940                 else
2941                         sense_len = ei->SenseLen;
2942                 decode_sense_data(ei->SenseInfo, sense_len,
2943                                         &sense_key, &asc, &ascq);
2944                 hpsa_print_cmd(h, "SCSI status", cp);
2945                 if (ei->ScsiStatus == SAM_STAT_CHECK_CONDITION)
2946                         dev_warn(d, "SCSI Status = 02, Sense key = 0x%02x, ASC = 0x%02x, ASCQ = 0x%02x\n",
2947                                 sense_key, asc, ascq);
2948                 else
2949                         dev_warn(d, "SCSI Status = 0x%02x\n", ei->ScsiStatus);
2950                 if (ei->ScsiStatus == 0)
2951                         dev_warn(d, "SCSI status is abnormally zero.  "
2952                         "(probably indicates selection timeout "
2953                         "reported incorrectly due to a known "
2954                         "firmware bug, circa July, 2001.)\n");
2955                 break;
2956         case CMD_DATA_UNDERRUN: /* let mid layer handle it. */
2957                 break;
2958         case CMD_DATA_OVERRUN:
2959                 hpsa_print_cmd(h, "overrun condition", cp);
2960                 break;
2961         case CMD_INVALID: {
2962                 /* controller unfortunately reports SCSI passthru's
2963                  * to non-existent targets as invalid commands.
2964                  */
2965                 hpsa_print_cmd(h, "invalid command", cp);
2966                 dev_warn(d, "probably means device no longer present\n");
2967                 }
2968                 break;
2969         case CMD_PROTOCOL_ERR:
2970                 hpsa_print_cmd(h, "protocol error", cp);
2971                 break;
2972         case CMD_HARDWARE_ERR:
2973                 hpsa_print_cmd(h, "hardware error", cp);
2974                 break;
2975         case CMD_CONNECTION_LOST:
2976                 hpsa_print_cmd(h, "connection lost", cp);
2977                 break;
2978         case CMD_ABORTED:
2979                 hpsa_print_cmd(h, "aborted", cp);
2980                 break;
2981         case CMD_ABORT_FAILED:
2982                 hpsa_print_cmd(h, "abort failed", cp);
2983                 break;
2984         case CMD_UNSOLICITED_ABORT:
2985                 hpsa_print_cmd(h, "unsolicited abort", cp);
2986                 break;
2987         case CMD_TIMEOUT:
2988                 hpsa_print_cmd(h, "timed out", cp);
2989                 break;
2990         case CMD_UNABORTABLE:
2991                 hpsa_print_cmd(h, "unabortable", cp);
2992                 break;
2993         case CMD_CTLR_LOCKUP:
2994                 hpsa_print_cmd(h, "controller lockup detected", cp);
2995                 break;
2996         default:
2997                 hpsa_print_cmd(h, "unknown status", cp);
2998                 dev_warn(d, "Unknown command status %x\n",
2999                                 ei->CommandStatus);
3000         }
3001 }
3002
3003 static int hpsa_do_receive_diagnostic(struct ctlr_info *h, u8 *scsi3addr,
3004                                         u8 page, u8 *buf, size_t bufsize)
3005 {
3006         int rc = IO_OK;
3007         struct CommandList *c;
3008         struct ErrorInfo *ei;
3009
3010         c = cmd_alloc(h);
3011         if (fill_cmd(c, RECEIVE_DIAGNOSTIC, h, buf, bufsize,
3012                         page, scsi3addr, TYPE_CMD)) {
3013                 rc = -1;
3014                 goto out;
3015         }
3016         rc = hpsa_scsi_do_simple_cmd_with_retry(h, c, DMA_FROM_DEVICE,
3017                         NO_TIMEOUT);
3018         if (rc)
3019                 goto out;
3020         ei = c->err_info;
3021         if (ei->CommandStatus != 0 && ei->CommandStatus != CMD_DATA_UNDERRUN) {
3022                 hpsa_scsi_interpret_error(h, c);
3023                 rc = -1;
3024         }
3025 out:
3026         cmd_free(h, c);
3027         return rc;
3028 }
3029
3030 static u64 hpsa_get_enclosure_logical_identifier(struct ctlr_info *h,
3031                                                 u8 *scsi3addr)
3032 {
3033         u8 *buf;
3034         u64 sa = 0;
3035         int rc = 0;
3036
3037         buf = kzalloc(1024, GFP_KERNEL);
3038         if (!buf)
3039                 return 0;
3040
3041         rc = hpsa_do_receive_diagnostic(h, scsi3addr, RECEIVE_DIAGNOSTIC,
3042                                         buf, 1024);
3043
3044         if (rc)
3045                 goto out;
3046
3047         sa = get_unaligned_be64(buf+12);
3048
3049 out:
3050         kfree(buf);
3051         return sa;
3052 }
3053
3054 static int hpsa_scsi_do_inquiry(struct ctlr_info *h, unsigned char *scsi3addr,
3055                         u16 page, unsigned char *buf,
3056                         unsigned char bufsize)
3057 {
3058         int rc = IO_OK;
3059         struct CommandList *c;
3060         struct ErrorInfo *ei;
3061
3062         c = cmd_alloc(h);
3063
3064         if (fill_cmd(c, HPSA_INQUIRY, h, buf, bufsize,
3065                         page, scsi3addr, TYPE_CMD)) {
3066                 rc = -1;
3067                 goto out;
3068         }
3069         rc = hpsa_scsi_do_simple_cmd_with_retry(h, c, DMA_FROM_DEVICE,
3070                         NO_TIMEOUT);
3071         if (rc)
3072                 goto out;
3073         ei = c->err_info;
3074         if (ei->CommandStatus != 0 && ei->CommandStatus != CMD_DATA_UNDERRUN) {
3075                 hpsa_scsi_interpret_error(h, c);
3076                 rc = -1;
3077         }
3078 out:
3079         cmd_free(h, c);
3080         return rc;
3081 }
3082
3083 static int hpsa_send_reset(struct ctlr_info *h, struct hpsa_scsi_dev_t *dev,
3084         u8 reset_type, int reply_queue)
3085 {
3086         int rc = IO_OK;
3087         struct CommandList *c;
3088         struct ErrorInfo *ei;
3089
3090         c = cmd_alloc(h);
3091         c->device = dev;
3092
3093         /* fill_cmd can't fail here, no data buffer to map. */
3094         (void) fill_cmd(c, reset_type, h, NULL, 0, 0, dev->scsi3addr, TYPE_MSG);
3095         rc = hpsa_scsi_do_simple_cmd(h, c, reply_queue, NO_TIMEOUT);
3096         if (rc) {
3097                 dev_warn(&h->pdev->dev, "Failed to send reset command\n");
3098                 goto out;
3099         }
3100         /* no unmap needed here because no data xfer. */
3101
3102         ei = c->err_info;
3103         if (ei->CommandStatus != 0) {
3104                 hpsa_scsi_interpret_error(h, c);
3105                 rc = -1;
3106         }
3107 out:
3108         cmd_free(h, c);
3109         return rc;
3110 }
3111
3112 static bool hpsa_cmd_dev_match(struct ctlr_info *h, struct CommandList *c,
3113                                struct hpsa_scsi_dev_t *dev,
3114                                unsigned char *scsi3addr)
3115 {
3116         int i;
3117         bool match = false;
3118         struct io_accel2_cmd *c2 = &h->ioaccel2_cmd_pool[c->cmdindex];
3119         struct hpsa_tmf_struct *ac = (struct hpsa_tmf_struct *) c2;
3120
3121         if (hpsa_is_cmd_idle(c))
3122                 return false;
3123
3124         switch (c->cmd_type) {
3125         case CMD_SCSI:
3126         case CMD_IOCTL_PEND:
3127                 match = !memcmp(scsi3addr, &c->Header.LUN.LunAddrBytes,
3128                                 sizeof(c->Header.LUN.LunAddrBytes));
3129                 break;
3130
3131         case CMD_IOACCEL1:
3132         case CMD_IOACCEL2:
3133                 if (c->phys_disk == dev) {
3134                         /* HBA mode match */
3135                         match = true;
3136                 } else {
3137                         /* Possible RAID mode -- check each phys dev. */
3138                         /* FIXME:  Do we need to take out a lock here?  If
3139                          * so, we could just call hpsa_get_pdisk_of_ioaccel2()
3140                          * instead. */
3141                         for (i = 0; i < dev->nphysical_disks && !match; i++) {
3142                                 /* FIXME: an alternate test might be
3143                                  *
3144                                  * match = dev->phys_disk[i]->ioaccel_handle
3145                                  *              == c2->scsi_nexus;      */
3146                                 match = dev->phys_disk[i] == c->phys_disk;
3147                         }
3148                 }
3149                 break;
3150
3151         case IOACCEL2_TMF:
3152                 for (i = 0; i < dev->nphysical_disks && !match; i++) {
3153                         match = dev->phys_disk[i]->ioaccel_handle ==
3154                                         le32_to_cpu(ac->it_nexus);
3155                 }
3156                 break;
3157
3158         case 0:         /* The command is in the middle of being initialized. */
3159                 match = false;
3160                 break;
3161
3162         default:
3163                 dev_err(&h->pdev->dev, "unexpected cmd_type: %d\n",
3164                         c->cmd_type);
3165                 BUG();
3166         }
3167
3168         return match;
3169 }
3170
3171 static int hpsa_do_reset(struct ctlr_info *h, struct hpsa_scsi_dev_t *dev,
3172         u8 reset_type, int reply_queue)
3173 {
3174         int rc = 0;
3175
3176         /* We can really only handle one reset at a time */
3177         if (mutex_lock_interruptible(&h->reset_mutex) == -EINTR) {
3178                 dev_warn(&h->pdev->dev, "concurrent reset wait interrupted.\n");
3179                 return -EINTR;
3180         }
3181
3182         rc = hpsa_send_reset(h, dev, reset_type, reply_queue);
3183         if (!rc) {
3184                 /* incremented by sending the reset request */
3185                 atomic_dec(&dev->commands_outstanding);
3186                 wait_event(h->event_sync_wait_queue,
3187                         atomic_read(&dev->commands_outstanding) <= 0 ||
3188                         lockup_detected(h));
3189         }
3190
3191         if (unlikely(lockup_detected(h))) {
3192                 dev_warn(&h->pdev->dev,
3193                          "Controller lockup detected during reset wait\n");
3194                 rc = -ENODEV;
3195         }
3196
3197         if (!rc)
3198                 rc = wait_for_device_to_become_ready(h, dev->scsi3addr, 0);
3199
3200         mutex_unlock(&h->reset_mutex);
3201         return rc;
3202 }
3203
3204 static void hpsa_get_raid_level(struct ctlr_info *h,
3205         unsigned char *scsi3addr, unsigned char *raid_level)
3206 {
3207         int rc;
3208         unsigned char *buf;
3209
3210         *raid_level = RAID_UNKNOWN;
3211         buf = kzalloc(64, GFP_KERNEL);
3212         if (!buf)
3213                 return;
3214
3215         if (!hpsa_vpd_page_supported(h, scsi3addr,
3216                 HPSA_VPD_LV_DEVICE_GEOMETRY))
3217                 goto exit;
3218
3219         rc = hpsa_scsi_do_inquiry(h, scsi3addr, VPD_PAGE |
3220                 HPSA_VPD_LV_DEVICE_GEOMETRY, buf, 64);
3221
3222         if (rc == 0)
3223                 *raid_level = buf[8];
3224         if (*raid_level > RAID_UNKNOWN)
3225                 *raid_level = RAID_UNKNOWN;
3226 exit:
3227         kfree(buf);
3228         return;
3229 }
3230
3231 #define HPSA_MAP_DEBUG
3232 #ifdef HPSA_MAP_DEBUG
3233 static void hpsa_debug_map_buff(struct ctlr_info *h, int rc,
3234                                 struct raid_map_data *map_buff)
3235 {
3236         struct raid_map_disk_data *dd = &map_buff->data[0];
3237         int map, row, col;
3238         u16 map_cnt, row_cnt, disks_per_row;
3239
3240         if (rc != 0)
3241                 return;
3242
3243         /* Show details only if debugging has been activated. */
3244         if (h->raid_offload_debug < 2)
3245                 return;
3246
3247         dev_info(&h->pdev->dev, "structure_size = %u\n",
3248                                 le32_to_cpu(map_buff->structure_size));
3249         dev_info(&h->pdev->dev, "volume_blk_size = %u\n",
3250                         le32_to_cpu(map_buff->volume_blk_size));
3251         dev_info(&h->pdev->dev, "volume_blk_cnt = 0x%llx\n",
3252                         le64_to_cpu(map_buff->volume_blk_cnt));
3253         dev_info(&h->pdev->dev, "physicalBlockShift = %u\n",
3254                         map_buff->phys_blk_shift);
3255         dev_info(&h->pdev->dev, "parity_rotation_shift = %u\n",
3256                         map_buff->parity_rotation_shift);
3257         dev_info(&h->pdev->dev, "strip_size = %u\n",
3258                         le16_to_cpu(map_buff->strip_size));
3259         dev_info(&h->pdev->dev, "disk_starting_blk = 0x%llx\n",
3260                         le64_to_cpu(map_buff->disk_starting_blk));
3261         dev_info(&h->pdev->dev, "disk_blk_cnt = 0x%llx\n",
3262                         le64_to_cpu(map_buff->disk_blk_cnt));
3263         dev_info(&h->pdev->dev, "data_disks_per_row = %u\n",
3264                         le16_to_cpu(map_buff->data_disks_per_row));
3265         dev_info(&h->pdev->dev, "metadata_disks_per_row = %u\n",
3266                         le16_to_cpu(map_buff->metadata_disks_per_row));
3267         dev_info(&h->pdev->dev, "row_cnt = %u\n",
3268                         le16_to_cpu(map_buff->row_cnt));
3269         dev_info(&h->pdev->dev, "layout_map_count = %u\n",
3270                         le16_to_cpu(map_buff->layout_map_count));
3271         dev_info(&h->pdev->dev, "flags = 0x%x\n",
3272                         le16_to_cpu(map_buff->flags));
3273         dev_info(&h->pdev->dev, "encryption = %s\n",
3274                         le16_to_cpu(map_buff->flags) &
3275                         RAID_MAP_FLAG_ENCRYPT_ON ?  "ON" : "OFF");
3276         dev_info(&h->pdev->dev, "dekindex = %u\n",
3277                         le16_to_cpu(map_buff->dekindex));
3278         map_cnt = le16_to_cpu(map_buff->layout_map_count);
3279         for (map = 0; map < map_cnt; map++) {
3280                 dev_info(&h->pdev->dev, "Map%u:\n", map);
3281                 row_cnt = le16_to_cpu(map_buff->row_cnt);
3282                 for (row = 0; row < row_cnt; row++) {
3283                         dev_info(&h->pdev->dev, "  Row%u:\n", row);
3284                         disks_per_row =
3285                                 le16_to_cpu(map_buff->data_disks_per_row);
3286                         for (col = 0; col < disks_per_row; col++, dd++)
3287                                 dev_info(&h->pdev->dev,
3288                                         "    D%02u: h=0x%04x xor=%u,%u\n",
3289                                         col, dd->ioaccel_handle,
3290                                         dd->xor_mult[0], dd->xor_mult[1]);
3291                         disks_per_row =
3292                                 le16_to_cpu(map_buff->metadata_disks_per_row);
3293                         for (col = 0; col < disks_per_row; col++, dd++)
3294                                 dev_info(&h->pdev->dev,
3295                                         "    M%02u: h=0x%04x xor=%u,%u\n",
3296                                         col, dd->ioaccel_handle,
3297                                         dd->xor_mult[0], dd->xor_mult[1]);
3298                 }
3299         }
3300 }
3301 #else
3302 static void hpsa_debug_map_buff(__attribute__((unused)) struct ctlr_info *h,
3303                         __attribute__((unused)) int rc,
3304                         __attribute__((unused)) struct raid_map_data *map_buff)
3305 {
3306 }
3307 #endif
3308
3309 static int hpsa_get_raid_map(struct ctlr_info *h,
3310         unsigned char *scsi3addr, struct hpsa_scsi_dev_t *this_device)
3311 {
3312         int rc = 0;
3313         struct CommandList *c;
3314         struct ErrorInfo *ei;
3315
3316         c = cmd_alloc(h);
3317
3318         if (fill_cmd(c, HPSA_GET_RAID_MAP, h, &this_device->raid_map,
3319                         sizeof(this_device->raid_map), 0,
3320                         scsi3addr, TYPE_CMD)) {
3321                 dev_warn(&h->pdev->dev, "hpsa_get_raid_map fill_cmd failed\n");
3322                 cmd_free(h, c);
3323                 return -1;
3324         }
3325         rc = hpsa_scsi_do_simple_cmd_with_retry(h, c, DMA_FROM_DEVICE,
3326                         NO_TIMEOUT);
3327         if (rc)
3328                 goto out;
3329         ei = c->err_info;
3330         if (ei->CommandStatus != 0 && ei->CommandStatus != CMD_DATA_UNDERRUN) {
3331                 hpsa_scsi_interpret_error(h, c);
3332                 rc = -1;
3333                 goto out;
3334         }
3335         cmd_free(h, c);
3336
3337         /* @todo in the future, dynamically allocate RAID map memory */
3338         if (le32_to_cpu(this_device->raid_map.structure_size) >
3339                                 sizeof(this_device->raid_map)) {
3340                 dev_warn(&h->pdev->dev, "RAID map size is too large!\n");
3341                 rc = -1;
3342         }
3343         hpsa_debug_map_buff(h, rc, &this_device->raid_map);
3344         return rc;
3345 out:
3346         cmd_free(h, c);
3347         return rc;
3348 }
3349
3350 static int hpsa_bmic_sense_subsystem_information(struct ctlr_info *h,
3351                 unsigned char scsi3addr[], u16 bmic_device_index,
3352                 struct bmic_sense_subsystem_info *buf, size_t bufsize)
3353 {
3354         int rc = IO_OK;
3355         struct CommandList *c;
3356         struct ErrorInfo *ei;
3357
3358         c = cmd_alloc(h);
3359
3360         rc = fill_cmd(c, BMIC_SENSE_SUBSYSTEM_INFORMATION, h, buf, bufsize,
3361                 0, RAID_CTLR_LUNID, TYPE_CMD);
3362         if (rc)
3363                 goto out;
3364
3365         c->Request.CDB[2] = bmic_device_index & 0xff;
3366         c->Request.CDB[9] = (bmic_device_index >> 8) & 0xff;
3367
3368         rc = hpsa_scsi_do_simple_cmd_with_retry(h, c, DMA_FROM_DEVICE,
3369                         NO_TIMEOUT);
3370         if (rc)
3371                 goto out;
3372         ei = c->err_info;
3373         if (ei->CommandStatus != 0 && ei->CommandStatus != CMD_DATA_UNDERRUN) {
3374                 hpsa_scsi_interpret_error(h, c);
3375                 rc = -1;
3376         }
3377 out:
3378         cmd_free(h, c);
3379         return rc;
3380 }
3381
3382 static int hpsa_bmic_id_controller(struct ctlr_info *h,
3383         struct bmic_identify_controller *buf, size_t bufsize)
3384 {
3385         int rc = IO_OK;
3386         struct CommandList *c;
3387         struct ErrorInfo *ei;
3388
3389         c = cmd_alloc(h);
3390
3391         rc = fill_cmd(c, BMIC_IDENTIFY_CONTROLLER, h, buf, bufsize,
3392                 0, RAID_CTLR_LUNID, TYPE_CMD);
3393         if (rc)
3394                 goto out;
3395
3396         rc = hpsa_scsi_do_simple_cmd_with_retry(h, c, DMA_FROM_DEVICE,
3397                         NO_TIMEOUT);
3398         if (rc)
3399                 goto out;
3400         ei = c->err_info;
3401         if (ei->CommandStatus != 0 && ei->CommandStatus != CMD_DATA_UNDERRUN) {
3402                 hpsa_scsi_interpret_error(h, c);
3403                 rc = -1;
3404         }
3405 out:
3406         cmd_free(h, c);
3407         return rc;
3408 }
3409
3410 static int hpsa_bmic_id_physical_device(struct ctlr_info *h,
3411                 unsigned char scsi3addr[], u16 bmic_device_index,
3412                 struct bmic_identify_physical_device *buf, size_t bufsize)
3413 {
3414         int rc = IO_OK;
3415         struct CommandList *c;
3416         struct ErrorInfo *ei;
3417
3418         c = cmd_alloc(h);
3419         rc = fill_cmd(c, BMIC_IDENTIFY_PHYSICAL_DEVICE, h, buf, bufsize,
3420                 0, RAID_CTLR_LUNID, TYPE_CMD);
3421         if (rc)
3422                 goto out;
3423
3424         c->Request.CDB[2] = bmic_device_index & 0xff;
3425         c->Request.CDB[9] = (bmic_device_index >> 8) & 0xff;
3426
3427         hpsa_scsi_do_simple_cmd_with_retry(h, c, DMA_FROM_DEVICE,
3428                                                 NO_TIMEOUT);
3429         ei = c->err_info;
3430         if (ei->CommandStatus != 0 && ei->CommandStatus != CMD_DATA_UNDERRUN) {
3431                 hpsa_scsi_interpret_error(h, c);
3432                 rc = -1;
3433         }
3434 out:
3435         cmd_free(h, c);
3436
3437         return rc;
3438 }
3439
3440 /*
3441  * get enclosure information
3442  * struct ReportExtendedLUNdata *rlep - Used for BMIC drive number
3443  * struct hpsa_scsi_dev_t *encl_dev - device entry for enclosure
3444  * Uses id_physical_device to determine the box_index.
3445  */
3446 static void hpsa_get_enclosure_info(struct ctlr_info *h,
3447                         unsigned char *scsi3addr,
3448                         struct ReportExtendedLUNdata *rlep, int rle_index,
3449                         struct hpsa_scsi_dev_t *encl_dev)
3450 {
3451         int rc = -1;
3452         struct CommandList *c = NULL;
3453         struct ErrorInfo *ei = NULL;
3454         struct bmic_sense_storage_box_params *bssbp = NULL;
3455         struct bmic_identify_physical_device *id_phys = NULL;
3456         struct ext_report_lun_entry *rle;
3457         u16 bmic_device_index = 0;
3458
3459         if (rle_index < 0 || rle_index >= HPSA_MAX_PHYS_LUN)
3460                 return;
3461
3462         rle = &rlep->LUN[rle_index];
3463
3464         encl_dev->eli =
3465                 hpsa_get_enclosure_logical_identifier(h, scsi3addr);
3466
3467         bmic_device_index = GET_BMIC_DRIVE_NUMBER(&rle->lunid[0]);
3468
3469         if (encl_dev->target == -1 || encl_dev->lun == -1) {
3470                 rc = IO_OK;
3471                 goto out;
3472         }
3473
3474         if (bmic_device_index == 0xFF00 || MASKED_DEVICE(&rle->lunid[0])) {
3475                 rc = IO_OK;
3476                 goto out;
3477         }
3478
3479         bssbp = kzalloc(sizeof(*bssbp), GFP_KERNEL);
3480         if (!bssbp)
3481                 goto out;
3482
3483         id_phys = kzalloc(sizeof(*id_phys), GFP_KERNEL);
3484         if (!id_phys)
3485                 goto out;
3486
3487         rc = hpsa_bmic_id_physical_device(h, scsi3addr, bmic_device_index,
3488                                                 id_phys, sizeof(*id_phys));
3489         if (rc) {
3490                 dev_warn(&h->pdev->dev, "%s: id_phys failed %d bdi[0x%x]\n",
3491                         __func__, encl_dev->external, bmic_device_index);
3492                 goto out;
3493         }
3494
3495         c = cmd_alloc(h);
3496
3497         rc = fill_cmd(c, BMIC_SENSE_STORAGE_BOX_PARAMS, h, bssbp,
3498                         sizeof(*bssbp), 0, RAID_CTLR_LUNID, TYPE_CMD);
3499
3500         if (rc)
3501                 goto out;
3502
3503         if (id_phys->phys_connector[1] == 'E')
3504                 c->Request.CDB[5] = id_phys->box_index;
3505         else
3506                 c->Request.CDB[5] = 0;
3507
3508         rc = hpsa_scsi_do_simple_cmd_with_retry(h, c, DMA_FROM_DEVICE,
3509                                                 NO_TIMEOUT);
3510         if (rc)
3511                 goto out;
3512
3513         ei = c->err_info;
3514         if (ei->CommandStatus != 0 && ei->CommandStatus != CMD_DATA_UNDERRUN) {
3515                 rc = -1;
3516                 goto out;
3517         }
3518
3519         encl_dev->box[id_phys->active_path_number] = bssbp->phys_box_on_port;
3520         memcpy(&encl_dev->phys_connector[id_phys->active_path_number],
3521                 bssbp->phys_connector, sizeof(bssbp->phys_connector));
3522
3523         rc = IO_OK;
3524 out:
3525         kfree(bssbp);
3526         kfree(id_phys);
3527
3528         if (c)
3529                 cmd_free(h, c);
3530
3531         if (rc != IO_OK)
3532                 hpsa_show_dev_msg(KERN_INFO, h, encl_dev,
3533                         "Error, could not get enclosure information");
3534 }
3535
3536 static u64 hpsa_get_sas_address_from_report_physical(struct ctlr_info *h,
3537                                                 unsigned char *scsi3addr)
3538 {
3539         struct ReportExtendedLUNdata *physdev;
3540         u32 nphysicals;
3541         u64 sa = 0;
3542         int i;
3543
3544         physdev = kzalloc(sizeof(*physdev), GFP_KERNEL);
3545         if (!physdev)
3546                 return 0;
3547
3548         if (hpsa_scsi_do_report_phys_luns(h, physdev, sizeof(*physdev))) {
3549                 dev_err(&h->pdev->dev, "report physical LUNs failed.\n");
3550                 kfree(physdev);
3551                 return 0;
3552         }
3553         nphysicals = get_unaligned_be32(physdev->LUNListLength) / 24;
3554
3555         for (i = 0; i < nphysicals; i++)
3556                 if (!memcmp(&physdev->LUN[i].lunid[0], scsi3addr, 8)) {
3557                         sa = get_unaligned_be64(&physdev->LUN[i].wwid[0]);
3558                         break;
3559                 }
3560
3561         kfree(physdev);
3562
3563         return sa;
3564 }
3565
3566 static void hpsa_get_sas_address(struct ctlr_info *h, unsigned char *scsi3addr,
3567                                         struct hpsa_scsi_dev_t *dev)
3568 {
3569         int rc;
3570         u64 sa = 0;
3571
3572         if (is_hba_lunid(scsi3addr)) {
3573                 struct bmic_sense_subsystem_info *ssi;
3574
3575                 ssi = kzalloc(sizeof(*ssi), GFP_KERNEL);
3576                 if (!ssi)
3577                         return;
3578
3579                 rc = hpsa_bmic_sense_subsystem_information(h,
3580                                         scsi3addr, 0, ssi, sizeof(*ssi));
3581                 if (rc == 0) {
3582                         sa = get_unaligned_be64(ssi->primary_world_wide_id);
3583                         h->sas_address = sa;
3584                 }
3585
3586                 kfree(ssi);
3587         } else
3588                 sa = hpsa_get_sas_address_from_report_physical(h, scsi3addr);
3589
3590         dev->sas_address = sa;
3591 }
3592
3593 static void hpsa_ext_ctrl_present(struct ctlr_info *h,
3594         struct ReportExtendedLUNdata *physdev)
3595 {
3596         u32 nphysicals;
3597         int i;
3598
3599         if (h->discovery_polling)
3600                 return;
3601
3602         nphysicals = (get_unaligned_be32(physdev->LUNListLength) / 24) + 1;
3603
3604         for (i = 0; i < nphysicals; i++) {
3605                 if (physdev->LUN[i].device_type ==
3606                         BMIC_DEVICE_TYPE_CONTROLLER
3607                         && !is_hba_lunid(physdev->LUN[i].lunid)) {
3608                         dev_info(&h->pdev->dev,
3609                                 "External controller present, activate discovery polling and disable rld caching\n");
3610                         hpsa_disable_rld_caching(h);
3611                         h->discovery_polling = 1;
3612                         break;
3613                 }
3614         }
3615 }
3616
3617 /* Get a device id from inquiry page 0x83 */
3618 static bool hpsa_vpd_page_supported(struct ctlr_info *h,
3619         unsigned char scsi3addr[], u8 page)
3620 {
3621         int rc;
3622         int i;
3623         int pages;
3624         unsigned char *buf, bufsize;
3625
3626         buf = kzalloc(256, GFP_KERNEL);
3627         if (!buf)
3628                 return false;
3629
3630         /* Get the size of the page list first */
3631         rc = hpsa_scsi_do_inquiry(h, scsi3addr,
3632                                 VPD_PAGE | HPSA_VPD_SUPPORTED_PAGES,
3633                                 buf, HPSA_VPD_HEADER_SZ);
3634         if (rc != 0)
3635                 goto exit_unsupported;
3636         pages = buf[3];
3637         if ((pages + HPSA_VPD_HEADER_SZ) <= 255)
3638                 bufsize = pages + HPSA_VPD_HEADER_SZ;
3639         else
3640                 bufsize = 255;
3641
3642         /* Get the whole VPD page list */
3643         rc = hpsa_scsi_do_inquiry(h, scsi3addr,
3644                                 VPD_PAGE | HPSA_VPD_SUPPORTED_PAGES,
3645                                 buf, bufsize);
3646         if (rc != 0)
3647                 goto exit_unsupported;
3648
3649         pages = buf[3];
3650         for (i = 1; i <= pages; i++)
3651                 if (buf[3 + i] == page)
3652                         goto exit_supported;
3653 exit_unsupported:
3654         kfree(buf);
3655         return false;
3656 exit_supported:
3657         kfree(buf);
3658         return true;
3659 }
3660
3661 /*
3662  * Called during a scan operation.
3663  * Sets ioaccel status on the new device list, not the existing device list
3664  *
3665  * The device list used during I/O will be updated later in
3666  * adjust_hpsa_scsi_table.
3667  */
3668 static void hpsa_get_ioaccel_status(struct ctlr_info *h,
3669         unsigned char *scsi3addr, struct hpsa_scsi_dev_t *this_device)
3670 {
3671         int rc;
3672         unsigned char *buf;
3673         u8 ioaccel_status;
3674
3675         this_device->offload_config = 0;
3676         this_device->offload_enabled = 0;
3677         this_device->offload_to_be_enabled = 0;
3678
3679         buf = kzalloc(64, GFP_KERNEL);
3680         if (!buf)
3681                 return;
3682         if (!hpsa_vpd_page_supported(h, scsi3addr, HPSA_VPD_LV_IOACCEL_STATUS))
3683                 goto out;
3684         rc = hpsa_scsi_do_inquiry(h, scsi3addr,
3685                         VPD_PAGE | HPSA_VPD_LV_IOACCEL_STATUS, buf, 64);
3686         if (rc != 0)
3687                 goto out;
3688
3689 #define IOACCEL_STATUS_BYTE 4
3690 #define OFFLOAD_CONFIGURED_BIT 0x01
3691 #define OFFLOAD_ENABLED_BIT 0x02
3692         ioaccel_status = buf[IOACCEL_STATUS_BYTE];
3693         this_device->offload_config =
3694                 !!(ioaccel_status & OFFLOAD_CONFIGURED_BIT);
3695         if (this_device->offload_config) {
3696                 bool offload_enabled =
3697                         !!(ioaccel_status & OFFLOAD_ENABLED_BIT);
3698                 /*
3699                  * Check to see if offload can be enabled.
3700                  */
3701                 if (offload_enabled) {
3702                         rc = hpsa_get_raid_map(h, scsi3addr, this_device);
3703                         if (rc) /* could not load raid_map */
3704                                 goto out;
3705                         this_device->offload_to_be_enabled = 1;
3706                 }
3707         }
3708
3709 out:
3710         kfree(buf);
3711         return;
3712 }
3713
3714 /* Get the device id from inquiry page 0x83 */
3715 static int hpsa_get_device_id(struct ctlr_info *h, unsigned char *scsi3addr,
3716         unsigned char *device_id, int index, int buflen)
3717 {
3718         int rc;
3719         unsigned char *buf;
3720
3721         /* Does controller have VPD for device id? */
3722         if (!hpsa_vpd_page_supported(h, scsi3addr, HPSA_VPD_LV_DEVICE_ID))
3723                 return 1; /* not supported */
3724
3725         buf = kzalloc(64, GFP_KERNEL);
3726         if (!buf)
3727                 return -ENOMEM;
3728
3729         rc = hpsa_scsi_do_inquiry(h, scsi3addr, VPD_PAGE |
3730                                         HPSA_VPD_LV_DEVICE_ID, buf, 64);
3731         if (rc == 0) {
3732                 if (buflen > 16)
3733                         buflen = 16;
3734                 memcpy(device_id, &buf[8], buflen);
3735         }
3736
3737         kfree(buf);
3738
3739         return rc; /*0 - got id,  otherwise, didn't */
3740 }
3741
3742 static int hpsa_scsi_do_report_luns(struct ctlr_info *h, int logical,
3743                 void *buf, int bufsize,
3744                 int extended_response)
3745 {
3746         int rc = IO_OK;
3747         struct CommandList *c;
3748         unsigned char scsi3addr[8];
3749         struct ErrorInfo *ei;
3750
3751         c = cmd_alloc(h);
3752
3753         /* address the controller */
3754         memset(scsi3addr, 0, sizeof(scsi3addr));
3755         if (fill_cmd(c, logical ? HPSA_REPORT_LOG : HPSA_REPORT_PHYS, h,
3756                 buf, bufsize, 0, scsi3addr, TYPE_CMD)) {
3757                 rc = -EAGAIN;
3758                 goto out;
3759         }
3760         if (extended_response)
3761                 c->Request.CDB[1] = extended_response;
3762         rc = hpsa_scsi_do_simple_cmd_with_retry(h, c, DMA_FROM_DEVICE,
3763                         NO_TIMEOUT);
3764         if (rc)
3765                 goto out;
3766         ei = c->err_info;
3767         if (ei->CommandStatus != 0 &&
3768             ei->CommandStatus != CMD_DATA_UNDERRUN) {
3769                 hpsa_scsi_interpret_error(h, c);
3770                 rc = -EIO;
3771         } else {
3772                 struct ReportLUNdata *rld = buf;
3773
3774                 if (rld->extended_response_flag != extended_response) {
3775                         if (!h->legacy_board) {
3776                                 dev_err(&h->pdev->dev,
3777                                         "report luns requested format %u, got %u\n",
3778                                         extended_response,
3779                                         rld->extended_response_flag);
3780                                 rc = -EINVAL;
3781                         } else
3782                                 rc = -EOPNOTSUPP;
3783                 }
3784         }
3785 out:
3786         cmd_free(h, c);
3787         return rc;
3788 }
3789
3790 static inline int hpsa_scsi_do_report_phys_luns(struct ctlr_info *h,
3791                 struct ReportExtendedLUNdata *buf, int bufsize)
3792 {
3793         int rc;
3794         struct ReportLUNdata *lbuf;
3795
3796         rc = hpsa_scsi_do_report_luns(h, 0, buf, bufsize,
3797                                       HPSA_REPORT_PHYS_EXTENDED);
3798         if (!rc || rc != -EOPNOTSUPP)
3799                 return rc;
3800
3801         /* REPORT PHYS EXTENDED is not supported */
3802         lbuf = kzalloc(sizeof(*lbuf), GFP_KERNEL);
3803         if (!lbuf)
3804                 return -ENOMEM;
3805
3806         rc = hpsa_scsi_do_report_luns(h, 0, lbuf, sizeof(*lbuf), 0);
3807         if (!rc) {
3808                 int i;
3809                 u32 nphys;
3810
3811                 /* Copy ReportLUNdata header */
3812                 memcpy(buf, lbuf, 8);
3813                 nphys = be32_to_cpu(*((__be32 *)lbuf->LUNListLength)) / 8;
3814                 for (i = 0; i < nphys; i++)
3815                         memcpy(buf->LUN[i].lunid, lbuf->LUN[i], 8);
3816         }
3817         kfree(lbuf);
3818         return rc;
3819 }
3820
3821 static inline int hpsa_scsi_do_report_log_luns(struct ctlr_info *h,
3822                 struct ReportLUNdata *buf, int bufsize)
3823 {
3824         return hpsa_scsi_do_report_luns(h, 1, buf, bufsize, 0);
3825 }
3826
3827 static inline void hpsa_set_bus_target_lun(struct hpsa_scsi_dev_t *device,
3828         int bus, int target, int lun)
3829 {
3830         device->bus = bus;
3831         device->target = target;
3832         device->lun = lun;
3833 }
3834
3835 /* Use VPD inquiry to get details of volume status */
3836 static int hpsa_get_volume_status(struct ctlr_info *h,
3837                                         unsigned char scsi3addr[])
3838 {
3839         int rc;
3840         int status;
3841         int size;
3842         unsigned char *buf;
3843
3844         buf = kzalloc(64, GFP_KERNEL);
3845         if (!buf)
3846                 return HPSA_VPD_LV_STATUS_UNSUPPORTED;
3847
3848         /* Does controller have VPD for logical volume status? */
3849         if (!hpsa_vpd_page_supported(h, scsi3addr, HPSA_VPD_LV_STATUS))
3850                 goto exit_failed;
3851
3852         /* Get the size of the VPD return buffer */
3853         rc = hpsa_scsi_do_inquiry(h, scsi3addr, VPD_PAGE | HPSA_VPD_LV_STATUS,
3854                                         buf, HPSA_VPD_HEADER_SZ);
3855         if (rc != 0)
3856                 goto exit_failed;
3857         size = buf[3];
3858
3859         /* Now get the whole VPD buffer */
3860         rc = hpsa_scsi_do_inquiry(h, scsi3addr, VPD_PAGE | HPSA_VPD_LV_STATUS,
3861                                         buf, size + HPSA_VPD_HEADER_SZ);
3862         if (rc != 0)
3863                 goto exit_failed;
3864         status = buf[4]; /* status byte */
3865
3866         kfree(buf);
3867         return status;
3868 exit_failed:
3869         kfree(buf);
3870         return HPSA_VPD_LV_STATUS_UNSUPPORTED;
3871 }
3872
3873 /* Determine offline status of a volume.
3874  * Return either:
3875  *  0 (not offline)
3876  *  0xff (offline for unknown reasons)
3877  *  # (integer code indicating one of several NOT READY states
3878  *     describing why a volume is to be kept offline)
3879  */
3880 static unsigned char hpsa_volume_offline(struct ctlr_info *h,
3881                                         unsigned char scsi3addr[])
3882 {
3883         struct CommandList *c;
3884         unsigned char *sense;
3885         u8 sense_key, asc, ascq;
3886         int sense_len;
3887         int rc, ldstat = 0;
3888 #define ASC_LUN_NOT_READY 0x04
3889 #define ASCQ_LUN_NOT_READY_FORMAT_IN_PROGRESS 0x04
3890 #define ASCQ_LUN_NOT_READY_INITIALIZING_CMD_REQ 0x02
3891
3892         c = cmd_alloc(h);
3893
3894         (void) fill_cmd(c, TEST_UNIT_READY, h, NULL, 0, 0, scsi3addr, TYPE_CMD);
3895         rc = hpsa_scsi_do_simple_cmd(h, c, DEFAULT_REPLY_QUEUE,
3896                                         NO_TIMEOUT);
3897         if (rc) {
3898                 cmd_free(h, c);
3899                 return HPSA_VPD_LV_STATUS_UNSUPPORTED;
3900         }
3901         sense = c->err_info->SenseInfo;
3902         if (c->err_info->SenseLen > sizeof(c->err_info->SenseInfo))
3903                 sense_len = sizeof(c->err_info->SenseInfo);
3904         else
3905                 sense_len = c->err_info->SenseLen;
3906         decode_sense_data(sense, sense_len, &sense_key, &asc, &ascq);
3907         cmd_free(h, c);
3908
3909         /* Determine the reason for not ready state */
3910         ldstat = hpsa_get_volume_status(h, scsi3addr);
3911
3912         /* Keep volume offline in certain cases: */
3913         switch (ldstat) {
3914         case HPSA_LV_FAILED:
3915         case HPSA_LV_UNDERGOING_ERASE:
3916         case HPSA_LV_NOT_AVAILABLE:
3917         case HPSA_LV_UNDERGOING_RPI:
3918         case HPSA_LV_PENDING_RPI:
3919         case HPSA_LV_ENCRYPTED_NO_KEY:
3920         case HPSA_LV_PLAINTEXT_IN_ENCRYPT_ONLY_CONTROLLER:
3921         case HPSA_LV_UNDERGOING_ENCRYPTION:
3922         case HPSA_LV_UNDERGOING_ENCRYPTION_REKEYING:
3923         case HPSA_LV_ENCRYPTED_IN_NON_ENCRYPTED_CONTROLLER:
3924                 return ldstat;
3925         case HPSA_VPD_LV_STATUS_UNSUPPORTED:
3926                 /* If VPD status page isn't available,
3927                  * use ASC/ASCQ to determine state
3928                  */
3929                 if ((ascq == ASCQ_LUN_NOT_READY_FORMAT_IN_PROGRESS) ||
3930                         (ascq == ASCQ_LUN_NOT_READY_INITIALIZING_CMD_REQ))
3931                         return ldstat;
3932                 break;
3933         default:
3934                 break;
3935         }
3936         return HPSA_LV_OK;
3937 }
3938
3939 static int hpsa_update_device_info(struct ctlr_info *h,
3940         unsigned char scsi3addr[], struct hpsa_scsi_dev_t *this_device,
3941         unsigned char *is_OBDR_device)
3942 {
3943
3944 #define OBDR_SIG_OFFSET 43
3945 #define OBDR_TAPE_SIG "$DR-10"
3946 #define OBDR_SIG_LEN (sizeof(OBDR_TAPE_SIG) - 1)
3947 #define OBDR_TAPE_INQ_SIZE (OBDR_SIG_OFFSET + OBDR_SIG_LEN)
3948
3949         unsigned char *inq_buff;
3950         unsigned char *obdr_sig;
3951         int rc = 0;
3952
3953         inq_buff = kzalloc(OBDR_TAPE_INQ_SIZE, GFP_KERNEL);
3954         if (!inq_buff) {
3955                 rc = -ENOMEM;
3956                 goto bail_out;
3957         }
3958
3959         /* Do an inquiry to the device to see what it is. */
3960         if (hpsa_scsi_do_inquiry(h, scsi3addr, 0, inq_buff,
3961                 (unsigned char) OBDR_TAPE_INQ_SIZE) != 0) {
3962                 dev_err(&h->pdev->dev,
3963                         "%s: inquiry failed, device will be skipped.\n",
3964                         __func__);
3965                 rc = HPSA_INQUIRY_FAILED;
3966                 goto bail_out;
3967         }
3968
3969         scsi_sanitize_inquiry_string(&inq_buff[8], 8);
3970         scsi_sanitize_inquiry_string(&inq_buff[16], 16);
3971
3972         this_device->devtype = (inq_buff[0] & 0x1f);
3973         memcpy(this_device->scsi3addr, scsi3addr, 8);
3974         memcpy(this_device->vendor, &inq_buff[8],
3975                 sizeof(this_device->vendor));
3976         memcpy(this_device->model, &inq_buff[16],
3977                 sizeof(this_device->model));
3978         this_device->rev = inq_buff[2];
3979         memset(this_device->device_id, 0,
3980                 sizeof(this_device->device_id));
3981         if (hpsa_get_device_id(h, scsi3addr, this_device->device_id, 8,
3982                 sizeof(this_device->device_id)) < 0) {
3983                 dev_err(&h->pdev->dev,
3984                         "hpsa%d: %s: can't get device id for [%d:%d:%d:%d]\t%s\t%.16s\n",
3985                         h->ctlr, __func__,
3986                         h->scsi_host->host_no,
3987                         this_device->bus, this_device->target,
3988                         this_device->lun,
3989                         scsi_device_type(this_device->devtype),
3990                         this_device->model);
3991                 rc = HPSA_LV_FAILED;
3992                 goto bail_out;
3993         }
3994
3995         if ((this_device->devtype == TYPE_DISK ||
3996                 this_device->devtype == TYPE_ZBC) &&
3997                 is_logical_dev_addr_mode(scsi3addr)) {
3998                 unsigned char volume_offline;
3999
4000                 hpsa_get_raid_level(h, scsi3addr, &this_device->raid_level);
4001                 if (h->fw_support & MISC_FW_RAID_OFFLOAD_BASIC)
4002                         hpsa_get_ioaccel_status(h, scsi3addr, this_device);
4003                 volume_offline = hpsa_volume_offline(h, scsi3addr);
4004                 if (volume_offline == HPSA_VPD_LV_STATUS_UNSUPPORTED &&
4005                     h->legacy_board) {
4006                         /*
4007                          * Legacy boards might not support volume status
4008                          */
4009                         dev_info(&h->pdev->dev,
4010                                  "C0:T%d:L%d Volume status not available, assuming online.\n",
4011                                  this_device->target, this_device->lun);
4012                         volume_offline = 0;
4013                 }
4014                 this_device->volume_offline = volume_offline;
4015                 if (volume_offline == HPSA_LV_FAILED) {
4016                         rc = HPSA_LV_FAILED;
4017                         dev_err(&h->pdev->dev,
4018                                 "%s: LV failed, device will be skipped.\n",
4019                                 __func__);
4020                         goto bail_out;
4021                 }
4022         } else {
4023                 this_device->raid_level = RAID_UNKNOWN;
4024                 this_device->offload_config = 0;
4025                 hpsa_turn_off_ioaccel_for_device(this_device);
4026                 this_device->hba_ioaccel_enabled = 0;
4027                 this_device->volume_offline = 0;
4028                 this_device->queue_depth = h->nr_cmds;
4029         }
4030
4031         if (this_device->external)
4032                 this_device->queue_depth = EXTERNAL_QD;
4033
4034         if (is_OBDR_device) {
4035                 /* See if this is a One-Button-Disaster-Recovery device
4036                  * by looking for "$DR-10" at offset 43 in inquiry data.
4037                  */
4038                 obdr_sig = &inq_buff[OBDR_SIG_OFFSET];
4039                 *is_OBDR_device = (this_device->devtype == TYPE_ROM &&
4040                                         strncmp(obdr_sig, OBDR_TAPE_SIG,
4041                                                 OBDR_SIG_LEN) == 0);
4042         }
4043         kfree(inq_buff);
4044         return 0;
4045
4046 bail_out:
4047         kfree(inq_buff);
4048         return rc;
4049 }
4050
4051 /*
4052  * Helper function to assign bus, target, lun mapping of devices.
4053  * Logical drive target and lun are assigned at this time, but
4054  * physical device lun and target assignment are deferred (assigned
4055  * in hpsa_find_target_lun, called by hpsa_scsi_add_entry.)
4056 */
4057 static void figure_bus_target_lun(struct ctlr_info *h,
4058         u8 *lunaddrbytes, struct hpsa_scsi_dev_t *device)
4059 {
4060         u32 lunid = get_unaligned_le32(lunaddrbytes);
4061
4062         if (!is_logical_dev_addr_mode(lunaddrbytes)) {
4063                 /* physical device, target and lun filled in later */
4064                 if (is_hba_lunid(lunaddrbytes)) {
4065                         int bus = HPSA_HBA_BUS;
4066
4067                         if (!device->rev)
4068                                 bus = HPSA_LEGACY_HBA_BUS;
4069                         hpsa_set_bus_target_lun(device,
4070                                         bus, 0, lunid & 0x3fff);
4071                 } else
4072                         /* defer target, lun assignment for physical devices */
4073                         hpsa_set_bus_target_lun(device,
4074                                         HPSA_PHYSICAL_DEVICE_BUS, -1, -1);
4075                 return;
4076         }
4077         /* It's a logical device */
4078         if (device->external) {
4079                 hpsa_set_bus_target_lun(device,
4080                         HPSA_EXTERNAL_RAID_VOLUME_BUS, (lunid >> 16) & 0x3fff,
4081                         lunid & 0x00ff);
4082                 return;
4083         }
4084         hpsa_set_bus_target_lun(device, HPSA_RAID_VOLUME_BUS,
4085                                 0, lunid & 0x3fff);
4086 }
4087
4088 static int  figure_external_status(struct ctlr_info *h, int raid_ctlr_position,
4089         int i, int nphysicals, int nlocal_logicals)
4090 {
4091         /* In report logicals, local logicals are listed first,
4092         * then any externals.
4093         */
4094         int logicals_start = nphysicals + (raid_ctlr_position == 0);
4095
4096         if (i == raid_ctlr_position)
4097                 return 0;
4098
4099         if (i < logicals_start)
4100                 return 0;
4101
4102         /* i is in logicals range, but still within local logicals */
4103         if ((i - nphysicals - (raid_ctlr_position == 0)) < nlocal_logicals)
4104                 return 0;
4105
4106         return 1; /* it's an external lun */
4107 }
4108
4109 /*
4110  * Do CISS_REPORT_PHYS and CISS_REPORT_LOG.  Data is returned in physdev,
4111  * logdev.  The number of luns in physdev and logdev are returned in
4112  * *nphysicals and *nlogicals, respectively.
4113  * Returns 0 on success, -1 otherwise.
4114  */
4115 static int hpsa_gather_lun_info(struct ctlr_info *h,
4116         struct ReportExtendedLUNdata *physdev, u32 *nphysicals,
4117         struct ReportLUNdata *logdev, u32 *nlogicals)
4118 {
4119         if (hpsa_scsi_do_report_phys_luns(h, physdev, sizeof(*physdev))) {
4120                 dev_err(&h->pdev->dev, "report physical LUNs failed.\n");
4121                 return -1;
4122         }
4123         *nphysicals = be32_to_cpu(*((__be32 *)physdev->LUNListLength)) / 24;
4124         if (*nphysicals > HPSA_MAX_PHYS_LUN) {
4125                 dev_warn(&h->pdev->dev, "maximum physical LUNs (%d) exceeded. %d LUNs ignored.\n",
4126                         HPSA_MAX_PHYS_LUN, *nphysicals - HPSA_MAX_PHYS_LUN);
4127                 *nphysicals = HPSA_MAX_PHYS_LUN;
4128         }
4129         if (hpsa_scsi_do_report_log_luns(h, logdev, sizeof(*logdev))) {
4130                 dev_err(&h->pdev->dev, "report logical LUNs failed.\n");
4131                 return -1;
4132         }
4133         *nlogicals = be32_to_cpu(*((__be32 *) logdev->LUNListLength)) / 8;
4134         /* Reject Logicals in excess of our max capability. */
4135         if (*nlogicals > HPSA_MAX_LUN) {
4136                 dev_warn(&h->pdev->dev,
4137                         "maximum logical LUNs (%d) exceeded.  "
4138                         "%d LUNs ignored.\n", HPSA_MAX_LUN,
4139                         *nlogicals - HPSA_MAX_LUN);
4140                 *nlogicals = HPSA_MAX_LUN;
4141         }
4142         if (*nlogicals + *nphysicals > HPSA_MAX_PHYS_LUN) {
4143                 dev_warn(&h->pdev->dev,
4144                         "maximum logical + physical LUNs (%d) exceeded. "
4145                         "%d LUNs ignored.\n", HPSA_MAX_PHYS_LUN,
4146                         *nphysicals + *nlogicals - HPSA_MAX_PHYS_LUN);
4147                 *nlogicals = HPSA_MAX_PHYS_LUN - *nphysicals;
4148         }
4149         return 0;
4150 }
4151
4152 static u8 *figure_lunaddrbytes(struct ctlr_info *h, int raid_ctlr_position,
4153         int i, int nphysicals, int nlogicals,
4154         struct ReportExtendedLUNdata *physdev_list,
4155         struct ReportLUNdata *logdev_list)
4156 {
4157         /* Helper function, figure out where the LUN ID info is coming from
4158          * given index i, lists of physical and logical devices, where in
4159          * the list the raid controller is supposed to appear (first or last)
4160          */
4161
4162         int logicals_start = nphysicals + (raid_ctlr_position == 0);
4163         int last_device = nphysicals + nlogicals + (raid_ctlr_position == 0);
4164
4165         if (i == raid_ctlr_position)
4166                 return RAID_CTLR_LUNID;
4167
4168         if (i < logicals_start)
4169                 return &physdev_list->LUN[i -
4170                                 (raid_ctlr_position == 0)].lunid[0];
4171
4172         if (i < last_device)
4173                 return &logdev_list->LUN[i - nphysicals -
4174                         (raid_ctlr_position == 0)][0];
4175         BUG();
4176         return NULL;
4177 }
4178
4179 /* get physical drive ioaccel handle and queue depth */
4180 static void hpsa_get_ioaccel_drive_info(struct ctlr_info *h,
4181                 struct hpsa_scsi_dev_t *dev,
4182                 struct ReportExtendedLUNdata *rlep, int rle_index,
4183                 struct bmic_identify_physical_device *id_phys)
4184 {
4185         int rc;
4186         struct ext_report_lun_entry *rle;
4187
4188         if (rle_index < 0 || rle_index >= HPSA_MAX_PHYS_LUN)
4189                 return;
4190
4191         rle = &rlep->LUN[rle_index];
4192
4193         dev->ioaccel_handle = rle->ioaccel_handle;
4194         if ((rle->device_flags & 0x08) && dev->ioaccel_handle)
4195                 dev->hba_ioaccel_enabled = 1;
4196         memset(id_phys, 0, sizeof(*id_phys));
4197         rc = hpsa_bmic_id_physical_device(h, &rle->lunid[0],
4198                         GET_BMIC_DRIVE_NUMBER(&rle->lunid[0]), id_phys,
4199                         sizeof(*id_phys));
4200         if (!rc)
4201                 /* Reserve space for FW operations */
4202 #define DRIVE_CMDS_RESERVED_FOR_FW 2
4203 #define DRIVE_QUEUE_DEPTH 7
4204                 dev->queue_depth =
4205                         le16_to_cpu(id_phys->current_queue_depth_limit) -
4206                                 DRIVE_CMDS_RESERVED_FOR_FW;
4207         else
4208                 dev->queue_depth = DRIVE_QUEUE_DEPTH; /* conservative */
4209 }
4210
4211 static void hpsa_get_path_info(struct hpsa_scsi_dev_t *this_device,
4212         struct ReportExtendedLUNdata *rlep, int rle_index,
4213         struct bmic_identify_physical_device *id_phys)
4214 {
4215         struct ext_report_lun_entry *rle;
4216
4217         if (rle_index < 0 || rle_index >= HPSA_MAX_PHYS_LUN)
4218                 return;
4219
4220         rle = &rlep->LUN[rle_index];
4221
4222         if ((rle->device_flags & 0x08) && this_device->ioaccel_handle)
4223                 this_device->hba_ioaccel_enabled = 1;
4224
4225         memcpy(&this_device->active_path_index,
4226                 &id_phys->active_path_number,
4227                 sizeof(this_device->active_path_index));
4228         memcpy(&this_device->path_map,
4229                 &id_phys->redundant_path_present_map,
4230                 sizeof(this_device->path_map));
4231         memcpy(&this_device->box,
4232                 &id_phys->alternate_paths_phys_box_on_port,
4233                 sizeof(this_device->box));
4234         memcpy(&this_device->phys_connector,
4235                 &id_phys->alternate_paths_phys_connector,
4236                 sizeof(this_device->phys_connector));
4237         memcpy(&this_device->bay,
4238                 &id_phys->phys_bay_in_box,
4239                 sizeof(this_device->bay));
4240 }
4241
4242 /* get number of local logical disks. */
4243 static int hpsa_set_local_logical_count(struct ctlr_info *h,
4244         struct bmic_identify_controller *id_ctlr,
4245         u32 *nlocals)
4246 {
4247         int rc;
4248
4249         if (!id_ctlr) {
4250                 dev_warn(&h->pdev->dev, "%s: id_ctlr buffer is NULL.\n",
4251                         __func__);
4252                 return -ENOMEM;
4253         }
4254         memset(id_ctlr, 0, sizeof(*id_ctlr));
4255         rc = hpsa_bmic_id_controller(h, id_ctlr, sizeof(*id_ctlr));
4256         if (!rc)
4257                 if (id_ctlr->configured_logical_drive_count < 255)
4258                         *nlocals = id_ctlr->configured_logical_drive_count;
4259                 else
4260                         *nlocals = le16_to_cpu(
4261                                         id_ctlr->extended_logical_unit_count);
4262         else
4263                 *nlocals = -1;
4264         return rc;
4265 }
4266
4267 static bool hpsa_is_disk_spare(struct ctlr_info *h, u8 *lunaddrbytes)
4268 {
4269         struct bmic_identify_physical_device *id_phys;
4270         bool is_spare = false;
4271         int rc;
4272
4273         id_phys = kzalloc(sizeof(*id_phys), GFP_KERNEL);
4274         if (!id_phys)
4275                 return false;
4276
4277         rc = hpsa_bmic_id_physical_device(h,
4278                                         lunaddrbytes,
4279                                         GET_BMIC_DRIVE_NUMBER(lunaddrbytes),
4280                                         id_phys, sizeof(*id_phys));
4281         if (rc == 0)
4282                 is_spare = (id_phys->more_flags >> 6) & 0x01;
4283
4284         kfree(id_phys);
4285         return is_spare;
4286 }
4287
4288 #define RPL_DEV_FLAG_NON_DISK                           0x1
4289 #define RPL_DEV_FLAG_UNCONFIG_DISK_REPORTING_SUPPORTED  0x2
4290 #define RPL_DEV_FLAG_UNCONFIG_DISK                      0x4
4291
4292 #define BMIC_DEVICE_TYPE_ENCLOSURE  6
4293
4294 static bool hpsa_skip_device(struct ctlr_info *h, u8 *lunaddrbytes,
4295                                 struct ext_report_lun_entry *rle)
4296 {
4297         u8 device_flags;
4298         u8 device_type;
4299
4300         if (!MASKED_DEVICE(lunaddrbytes))
4301                 return false;
4302
4303         device_flags = rle->device_flags;
4304         device_type = rle->device_type;
4305
4306         if (device_flags & RPL_DEV_FLAG_NON_DISK) {
4307                 if (device_type == BMIC_DEVICE_TYPE_ENCLOSURE)
4308                         return false;
4309                 return true;
4310         }
4311
4312         if (!(device_flags & RPL_DEV_FLAG_UNCONFIG_DISK_REPORTING_SUPPORTED))
4313                 return false;
4314
4315         if (device_flags & RPL_DEV_FLAG_UNCONFIG_DISK)
4316                 return false;
4317
4318         /*
4319          * Spares may be spun down, we do not want to
4320          * do an Inquiry to a RAID set spare drive as
4321          * that would have them spun up, that is a
4322          * performance hit because I/O to the RAID device
4323          * stops while the spin up occurs which can take
4324          * over 50 seconds.
4325          */
4326         if (hpsa_is_disk_spare(h, lunaddrbytes))
4327                 return true;
4328
4329         return false;
4330 }
4331
4332 static void hpsa_update_scsi_devices(struct ctlr_info *h)
4333 {
4334         /* the idea here is we could get notified
4335          * that some devices have changed, so we do a report
4336          * physical luns and report logical luns cmd, and adjust
4337          * our list of devices accordingly.
4338          *
4339          * The scsi3addr's of devices won't change so long as the
4340          * adapter is not reset.  That means we can rescan and
4341          * tell which devices we already know about, vs. new
4342          * devices, vs.  disappearing devices.
4343          */
4344         struct ReportExtendedLUNdata *physdev_list = NULL;
4345         struct ReportLUNdata *logdev_list = NULL;
4346         struct bmic_identify_physical_device *id_phys = NULL;
4347         struct bmic_identify_controller *id_ctlr = NULL;
4348         u32 nphysicals = 0;
4349         u32 nlogicals = 0;
4350         u32 nlocal_logicals = 0;
4351         u32 ndev_allocated = 0;
4352         struct hpsa_scsi_dev_t **currentsd, *this_device, *tmpdevice;
4353         int ncurrent = 0;
4354         int i, ndevs_to_allocate;
4355         int raid_ctlr_position;
4356         bool physical_device;
4357         DECLARE_BITMAP(lunzerobits, MAX_EXT_TARGETS);
4358
4359         currentsd = kcalloc(HPSA_MAX_DEVICES, sizeof(*currentsd), GFP_KERNEL);
4360         physdev_list = kzalloc(sizeof(*physdev_list), GFP_KERNEL);
4361         logdev_list = kzalloc(sizeof(*logdev_list), GFP_KERNEL);
4362         tmpdevice = kzalloc(sizeof(*tmpdevice), GFP_KERNEL);
4363         id_phys = kzalloc(sizeof(*id_phys), GFP_KERNEL);
4364         id_ctlr = kzalloc(sizeof(*id_ctlr), GFP_KERNEL);
4365
4366         if (!currentsd || !physdev_list || !logdev_list ||
4367                 !tmpdevice || !id_phys || !id_ctlr) {
4368                 dev_err(&h->pdev->dev, "out of memory\n");
4369                 goto out;
4370         }
4371         memset(lunzerobits, 0, sizeof(lunzerobits));
4372
4373         h->drv_req_rescan = 0; /* cancel scheduled rescan - we're doing it. */
4374
4375         if (hpsa_gather_lun_info(h, physdev_list, &nphysicals,
4376                         logdev_list, &nlogicals)) {
4377                 h->drv_req_rescan = 1;
4378                 goto out;
4379         }
4380
4381         /* Set number of local logicals (non PTRAID) */
4382         if (hpsa_set_local_logical_count(h, id_ctlr, &nlocal_logicals)) {
4383                 dev_warn(&h->pdev->dev,
4384                         "%s: Can't determine number of local logical devices.\n",
4385                         __func__);
4386         }
4387
4388         /* We might see up to the maximum number of logical and physical disks
4389          * plus external target devices, and a device for the local RAID
4390          * controller.
4391          */
4392         ndevs_to_allocate = nphysicals + nlogicals + MAX_EXT_TARGETS + 1;
4393
4394         hpsa_ext_ctrl_present(h, physdev_list);
4395
4396         /* Allocate the per device structures */
4397         for (i = 0; i < ndevs_to_allocate; i++) {
4398                 if (i >= HPSA_MAX_DEVICES) {
4399                         dev_warn(&h->pdev->dev, "maximum devices (%d) exceeded."
4400                                 "  %d devices ignored.\n", HPSA_MAX_DEVICES,
4401                                 ndevs_to_allocate - HPSA_MAX_DEVICES);
4402                         break;
4403                 }
4404
4405                 currentsd[i] = kzalloc(sizeof(*currentsd[i]), GFP_KERNEL);
4406                 if (!currentsd[i]) {
4407                         h->drv_req_rescan = 1;
4408                         goto out;
4409                 }
4410                 ndev_allocated++;
4411         }
4412
4413         if (is_scsi_rev_5(h))
4414                 raid_ctlr_position = 0;
4415         else
4416                 raid_ctlr_position = nphysicals + nlogicals;
4417
4418         /* adjust our table of devices */
4419         for (i = 0; i < nphysicals + nlogicals + 1; i++) {
4420                 u8 *lunaddrbytes, is_OBDR = 0;
4421                 int rc = 0;
4422                 int phys_dev_index = i - (raid_ctlr_position == 0);
4423                 bool skip_device = false;
4424
4425                 memset(tmpdevice, 0, sizeof(*tmpdevice));
4426
4427                 physical_device = i < nphysicals + (raid_ctlr_position == 0);
4428
4429                 /* Figure out where the LUN ID info is coming from */
4430                 lunaddrbytes = figure_lunaddrbytes(h, raid_ctlr_position,
4431                         i, nphysicals, nlogicals, physdev_list, logdev_list);
4432
4433                 /* Determine if this is a lun from an external target array */
4434                 tmpdevice->external =
4435                         figure_external_status(h, raid_ctlr_position, i,
4436                                                 nphysicals, nlocal_logicals);
4437
4438                 /*
4439                  * Skip over some devices such as a spare.
4440                  */
4441                 if (phys_dev_index >= 0 && !tmpdevice->external &&
4442                         physical_device) {
4443                         skip_device = hpsa_skip_device(h, lunaddrbytes,
4444                                         &physdev_list->LUN[phys_dev_index]);
4445                         if (skip_device)
4446                                 continue;
4447                 }
4448
4449                 /* Get device type, vendor, model, device id, raid_map */
4450                 rc = hpsa_update_device_info(h, lunaddrbytes, tmpdevice,
4451                                                         &is_OBDR);
4452                 if (rc == -ENOMEM) {
4453                         dev_warn(&h->pdev->dev,
4454                                 "Out of memory, rescan deferred.\n");
4455                         h->drv_req_rescan = 1;
4456                         goto out;
4457                 }
4458                 if (rc) {
4459                         h->drv_req_rescan = 1;
4460                         continue;
4461                 }
4462
4463                 figure_bus_target_lun(h, lunaddrbytes, tmpdevice);
4464                 this_device = currentsd[ncurrent];
4465
4466                 *this_device = *tmpdevice;
4467                 this_device->physical_device = physical_device;
4468
4469                 /*
4470                  * Expose all devices except for physical devices that
4471                  * are masked.
4472                  */
4473                 if (MASKED_DEVICE(lunaddrbytes) && this_device->physical_device)
4474                         this_device->expose_device = 0;
4475                 else
4476                         this_device->expose_device = 1;
4477
4478
4479                 /*
4480                  * Get the SAS address for physical devices that are exposed.
4481                  */
4482                 if (this_device->physical_device && this_device->expose_device)
4483                         hpsa_get_sas_address(h, lunaddrbytes, this_device);
4484
4485                 switch (this_device->devtype) {
4486                 case TYPE_ROM:
4487                         /* We don't *really* support actual CD-ROM devices,
4488                          * just "One Button Disaster Recovery" tape drive
4489                          * which temporarily pretends to be a CD-ROM drive.
4490                          * So we check that the device is really an OBDR tape
4491                          * device by checking for "$DR-10" in bytes 43-48 of
4492                          * the inquiry data.
4493                          */
4494                         if (is_OBDR)
4495                                 ncurrent++;
4496                         break;
4497                 case TYPE_DISK:
4498                 case TYPE_ZBC:
4499                         if (this_device->physical_device) {
4500                                 /* The disk is in HBA mode. */
4501                                 /* Never use RAID mapper in HBA mode. */
4502                                 this_device->offload_enabled = 0;
4503                                 hpsa_get_ioaccel_drive_info(h, this_device,
4504                                         physdev_list, phys_dev_index, id_phys);
4505                                 hpsa_get_path_info(this_device,
4506                                         physdev_list, phys_dev_index, id_phys);
4507                         }
4508                         ncurrent++;
4509                         break;
4510                 case TYPE_TAPE:
4511                 case TYPE_MEDIUM_CHANGER:
4512                         ncurrent++;
4513                         break;
4514                 case TYPE_ENCLOSURE:
4515                         if (!this_device->external)
4516                                 hpsa_get_enclosure_info(h, lunaddrbytes,
4517                                                 physdev_list, phys_dev_index,
4518                                                 this_device);
4519                         ncurrent++;
4520                         break;
4521                 case TYPE_RAID:
4522                         /* Only present the Smartarray HBA as a RAID controller.
4523                          * If it's a RAID controller other than the HBA itself
4524                          * (an external RAID controller, MSA500 or similar)
4525                          * don't present it.
4526                          */
4527                         if (!is_hba_lunid(lunaddrbytes))
4528                                 break;
4529                         ncurrent++;
4530                         break;
4531                 default:
4532                         break;
4533                 }
4534                 if (ncurrent >= HPSA_MAX_DEVICES)
4535                         break;
4536         }
4537
4538         if (h->sas_host == NULL) {
4539                 int rc = 0;
4540
4541                 rc = hpsa_add_sas_host(h);
4542                 if (rc) {
4543                         dev_warn(&h->pdev->dev,
4544                                 "Could not add sas host %d\n", rc);
4545                         goto out;
4546                 }
4547         }
4548
4549         adjust_hpsa_scsi_table(h, currentsd, ncurrent);
4550 out:
4551         kfree(tmpdevice);
4552         for (i = 0; i < ndev_allocated; i++)
4553                 kfree(currentsd[i]);
4554         kfree(currentsd);
4555         kfree(physdev_list);
4556         kfree(logdev_list);
4557         kfree(id_ctlr);
4558         kfree(id_phys);
4559 }
4560
4561 static void hpsa_set_sg_descriptor(struct SGDescriptor *desc,
4562                                    struct scatterlist *sg)
4563 {
4564         u64 addr64 = (u64) sg_dma_address(sg);
4565         unsigned int len = sg_dma_len(sg);
4566
4567         desc->Addr = cpu_to_le64(addr64);
4568         desc->Len = cpu_to_le32(len);
4569         desc->Ext = 0;
4570 }
4571
4572 /*
4573  * hpsa_scatter_gather takes a struct scsi_cmnd, (cmd), and does the pci
4574  * dma mapping  and fills in the scatter gather entries of the
4575  * hpsa command, cp.
4576  */
4577 static int hpsa_scatter_gather(struct ctlr_info *h,
4578                 struct CommandList *cp,
4579                 struct scsi_cmnd *cmd)
4580 {
4581         struct scatterlist *sg;
4582         int use_sg, i, sg_limit, chained;
4583         struct SGDescriptor *curr_sg;
4584
4585         BUG_ON(scsi_sg_count(cmd) > h->maxsgentries);
4586
4587         use_sg = scsi_dma_map(cmd);
4588         if (use_sg < 0)
4589                 return use_sg;
4590
4591         if (!use_sg)
4592                 goto sglist_finished;
4593
4594         /*
4595          * If the number of entries is greater than the max for a single list,
4596          * then we have a chained list; we will set up all but one entry in the
4597          * first list (the last entry is saved for link information);
4598          * otherwise, we don't have a chained list and we'll set up at each of
4599          * the entries in the one list.
4600          */
4601         curr_sg = cp->SG;
4602         chained = use_sg > h->max_cmd_sg_entries;
4603         sg_limit = chained ? h->max_cmd_sg_entries - 1 : use_sg;
4604         scsi_for_each_sg(cmd, sg, sg_limit, i) {
4605                 hpsa_set_sg_descriptor(curr_sg, sg);
4606                 curr_sg++;
4607         }
4608
4609         if (chained) {
4610                 /*
4611                  * Continue with the chained list.  Set curr_sg to the chained
4612                  * list.  Modify the limit to the total count less the entries
4613                  * we've already set up.  Resume the scan at the list entry
4614                  * where the previous loop left off.
4615                  */
4616                 curr_sg = h->cmd_sg_list[cp->cmdindex];
4617                 sg_limit = use_sg - sg_limit;
4618                 for_each_sg(sg, sg, sg_limit, i) {
4619                         hpsa_set_sg_descriptor(curr_sg, sg);
4620                         curr_sg++;
4621                 }
4622         }
4623
4624         /* Back the pointer up to the last entry and mark it as "last". */
4625         (curr_sg - 1)->Ext = cpu_to_le32(HPSA_SG_LAST);
4626
4627         if (use_sg + chained > h->maxSG)
4628                 h->maxSG = use_sg + chained;
4629
4630         if (chained) {
4631                 cp->Header.SGList = h->max_cmd_sg_entries;
4632                 cp->Header.SGTotal = cpu_to_le16(use_sg + 1);
4633                 if (hpsa_map_sg_chain_block(h, cp)) {
4634                         scsi_dma_unmap(cmd);
4635                         return -1;
4636                 }
4637                 return 0;
4638         }
4639
4640 sglist_finished:
4641
4642         cp->Header.SGList = (u8) use_sg;   /* no. SGs contig in this cmd */
4643         cp->Header.SGTotal = cpu_to_le16(use_sg); /* total sgs in cmd list */
4644         return 0;
4645 }
4646
4647 static inline void warn_zero_length_transfer(struct ctlr_info *h,
4648                                                 u8 *cdb, int cdb_len,
4649                                                 const char *func)
4650 {
4651         dev_warn(&h->pdev->dev,
4652                  "%s: Blocking zero-length request: CDB:%*phN\n",
4653                  func, cdb_len, cdb);
4654 }
4655
4656 #define IO_ACCEL_INELIGIBLE 1
4657 /* zero-length transfers trigger hardware errors. */
4658 static bool is_zero_length_transfer(u8 *cdb)
4659 {
4660         u32 block_cnt;
4661
4662         /* Block zero-length transfer sizes on certain commands. */
4663         switch (cdb[0]) {
4664         case READ_10:
4665         case WRITE_10:
4666         case VERIFY:            /* 0x2F */
4667         case WRITE_VERIFY:      /* 0x2E */
4668                 block_cnt = get_unaligned_be16(&cdb[7]);
4669                 break;
4670         case READ_12:
4671         case WRITE_12:
4672         case VERIFY_12: /* 0xAF */
4673         case WRITE_VERIFY_12:   /* 0xAE */
4674                 block_cnt = get_unaligned_be32(&cdb[6]);
4675                 break;
4676         case READ_16:
4677         case WRITE_16:
4678         case VERIFY_16:         /* 0x8F */
4679                 block_cnt = get_unaligned_be32(&cdb[10]);
4680                 break;
4681         default:
4682                 return false;
4683         }
4684
4685         return block_cnt == 0;
4686 }
4687
4688 static int fixup_ioaccel_cdb(u8 *cdb, int *cdb_len)
4689 {
4690         int is_write = 0;
4691         u32 block;
4692         u32 block_cnt;
4693
4694         /* Perform some CDB fixups if needed using 10 byte reads/writes only */
4695         switch (cdb[0]) {
4696         case WRITE_6:
4697         case WRITE_12:
4698                 is_write = 1;
4699                 fallthrough;
4700         case READ_6:
4701         case READ_12:
4702                 if (*cdb_len == 6) {
4703                         block = (((cdb[1] & 0x1F) << 16) |
4704                                 (cdb[2] << 8) |
4705                                 cdb[3]);
4706                         block_cnt = cdb[4];
4707                         if (block_cnt == 0)
4708                                 block_cnt = 256;
4709                 } else {
4710                         BUG_ON(*cdb_len != 12);
4711                         block = get_unaligned_be32(&cdb[2]);
4712                         block_cnt = get_unaligned_be32(&cdb[6]);
4713                 }
4714                 if (block_cnt > 0xffff)
4715                         return IO_ACCEL_INELIGIBLE;
4716
4717                 cdb[0] = is_write ? WRITE_10 : READ_10;
4718                 cdb[1] = 0;
4719                 cdb[2] = (u8) (block >> 24);
4720                 cdb[3] = (u8) (block >> 16);
4721                 cdb[4] = (u8) (block >> 8);
4722                 cdb[5] = (u8) (block);
4723                 cdb[6] = 0;
4724                 cdb[7] = (u8) (block_cnt >> 8);
4725                 cdb[8] = (u8) (block_cnt);
4726                 cdb[9] = 0;
4727                 *cdb_len = 10;
4728                 break;
4729         }
4730         return 0;
4731 }
4732
4733 static int hpsa_scsi_ioaccel1_queue_command(struct ctlr_info *h,
4734         struct CommandList *c, u32 ioaccel_handle, u8 *cdb, int cdb_len,
4735         u8 *scsi3addr, struct hpsa_scsi_dev_t *phys_disk)
4736 {
4737         struct scsi_cmnd *cmd = c->scsi_cmd;
4738         struct io_accel1_cmd *cp = &h->ioaccel_cmd_pool[c->cmdindex];
4739         unsigned int len;
4740         unsigned int total_len = 0;
4741         struct scatterlist *sg;
4742         u64 addr64;
4743         int use_sg, i;
4744         struct SGDescriptor *curr_sg;
4745         u32 control = IOACCEL1_CONTROL_SIMPLEQUEUE;
4746
4747         /* TODO: implement chaining support */
4748         if (scsi_sg_count(cmd) > h->ioaccel_maxsg) {
4749                 atomic_dec(&phys_disk->ioaccel_cmds_out);
4750                 return IO_ACCEL_INELIGIBLE;
4751         }
4752
4753         BUG_ON(cmd->cmd_len > IOACCEL1_IOFLAGS_CDBLEN_MAX);
4754
4755         if (is_zero_length_transfer(cdb)) {
4756                 warn_zero_length_transfer(h, cdb, cdb_len, __func__);
4757                 atomic_dec(&phys_disk->ioaccel_cmds_out);
4758                 return IO_ACCEL_INELIGIBLE;
4759         }
4760
4761         if (fixup_ioaccel_cdb(cdb, &cdb_len)) {
4762                 atomic_dec(&phys_disk->ioaccel_cmds_out);
4763                 return IO_ACCEL_INELIGIBLE;
4764         }
4765
4766         c->cmd_type = CMD_IOACCEL1;
4767
4768         /* Adjust the DMA address to point to the accelerated command buffer */
4769         c->busaddr = (u32) h->ioaccel_cmd_pool_dhandle +
4770                                 (c->cmdindex * sizeof(*cp));
4771         BUG_ON(c->busaddr & 0x0000007F);
4772
4773         use_sg = scsi_dma_map(cmd);
4774         if (use_sg < 0) {
4775                 atomic_dec(&phys_disk->ioaccel_cmds_out);
4776                 return use_sg;
4777         }
4778
4779         if (use_sg) {
4780                 curr_sg = cp->SG;
4781                 scsi_for_each_sg(cmd, sg, use_sg, i) {
4782                         addr64 = (u64) sg_dma_address(sg);
4783                         len  = sg_dma_len(sg);
4784                         total_len += len;
4785                         curr_sg->Addr = cpu_to_le64(addr64);
4786                         curr_sg->Len = cpu_to_le32(len);
4787                         curr_sg->Ext = cpu_to_le32(0);
4788                         curr_sg++;
4789                 }
4790                 (--curr_sg)->Ext = cpu_to_le32(HPSA_SG_LAST);
4791
4792                 switch (cmd->sc_data_direction) {
4793                 case DMA_TO_DEVICE:
4794                         control |= IOACCEL1_CONTROL_DATA_OUT;
4795                         break;
4796                 case DMA_FROM_DEVICE:
4797                         control |= IOACCEL1_CONTROL_DATA_IN;
4798                         break;
4799                 case DMA_NONE:
4800                         control |= IOACCEL1_CONTROL_NODATAXFER;
4801                         break;
4802                 default:
4803                         dev_err(&h->pdev->dev, "unknown data direction: %d\n",
4804                         cmd->sc_data_direction);
4805                         BUG();
4806                         break;
4807                 }
4808         } else {
4809                 control |= IOACCEL1_CONTROL_NODATAXFER;
4810         }
4811
4812         c->Header.SGList = use_sg;
4813         /* Fill out the command structure to submit */
4814         cp->dev_handle = cpu_to_le16(ioaccel_handle & 0xFFFF);
4815         cp->transfer_len = cpu_to_le32(total_len);
4816         cp->io_flags = cpu_to_le16(IOACCEL1_IOFLAGS_IO_REQ |
4817                         (cdb_len & IOACCEL1_IOFLAGS_CDBLEN_MASK));
4818         cp->control = cpu_to_le32(control);
4819         memcpy(cp->CDB, cdb, cdb_len);
4820         memcpy(cp->CISS_LUN, scsi3addr, 8);
4821         /* Tag was already set at init time. */
4822         enqueue_cmd_and_start_io(h, c);
4823         return 0;
4824 }
4825
4826 /*
4827  * Queue a command directly to a device behind the controller using the
4828  * I/O accelerator path.
4829  */
4830 static int hpsa_scsi_ioaccel_direct_map(struct ctlr_info *h,
4831         struct CommandList *c)
4832 {
4833         struct scsi_cmnd *cmd = c->scsi_cmd;
4834         struct hpsa_scsi_dev_t *dev = cmd->device->hostdata;
4835
4836         if (!dev)
4837                 return -1;
4838
4839         c->phys_disk = dev;
4840
4841         if (dev->in_reset)
4842                 return -1;
4843
4844         return hpsa_scsi_ioaccel_queue_command(h, c, dev->ioaccel_handle,
4845                 cmd->cmnd, cmd->cmd_len, dev->scsi3addr, dev);
4846 }
4847
4848 /*
4849  * Set encryption parameters for the ioaccel2 request
4850  */
4851 static void set_encrypt_ioaccel2(struct ctlr_info *h,
4852         struct CommandList *c, struct io_accel2_cmd *cp)
4853 {
4854         struct scsi_cmnd *cmd = c->scsi_cmd;
4855         struct hpsa_scsi_dev_t *dev = cmd->device->hostdata;
4856         struct raid_map_data *map = &dev->raid_map;
4857         u64 first_block;
4858
4859         /* Are we doing encryption on this device */
4860         if (!(le16_to_cpu(map->flags) & RAID_MAP_FLAG_ENCRYPT_ON))
4861                 return;
4862         /* Set the data encryption key index. */
4863         cp->dekindex = map->dekindex;
4864
4865         /* Set the encryption enable flag, encoded into direction field. */
4866         cp->direction |= IOACCEL2_DIRECTION_ENCRYPT_MASK;
4867
4868         /* Set encryption tweak values based on logical block address
4869          * If block size is 512, tweak value is LBA.
4870          * For other block sizes, tweak is (LBA * block size)/ 512)
4871          */
4872         switch (cmd->cmnd[0]) {
4873         /* Required? 6-byte cdbs eliminated by fixup_ioaccel_cdb */
4874         case READ_6:
4875         case WRITE_6:
4876                 first_block = (((cmd->cmnd[1] & 0x1F) << 16) |
4877                                 (cmd->cmnd[2] << 8) |
4878                                 cmd->cmnd[3]);
4879                 break;
4880         case WRITE_10:
4881         case READ_10:
4882         /* Required? 12-byte cdbs eliminated by fixup_ioaccel_cdb */
4883         case WRITE_12:
4884         case READ_12:
4885                 first_block = get_unaligned_be32(&cmd->cmnd[2]);
4886                 break;
4887         case WRITE_16:
4888         case READ_16:
4889                 first_block = get_unaligned_be64(&cmd->cmnd[2]);
4890                 break;
4891         default:
4892                 dev_err(&h->pdev->dev,
4893                         "ERROR: %s: size (0x%x) not supported for encryption\n",
4894                         __func__, cmd->cmnd[0]);
4895                 BUG();
4896                 break;
4897         }
4898
4899         if (le32_to_cpu(map->volume_blk_size) != 512)
4900                 first_block = first_block *
4901                                 le32_to_cpu(map->volume_blk_size)/512;
4902
4903         cp->tweak_lower = cpu_to_le32(first_block);
4904         cp->tweak_upper = cpu_to_le32(first_block >> 32);
4905 }
4906
4907 static int hpsa_scsi_ioaccel2_queue_command(struct ctlr_info *h,
4908         struct CommandList *c, u32 ioaccel_handle, u8 *cdb, int cdb_len,
4909         u8 *scsi3addr, struct hpsa_scsi_dev_t *phys_disk)
4910 {
4911         struct scsi_cmnd *cmd = c->scsi_cmd;
4912         struct io_accel2_cmd *cp = &h->ioaccel2_cmd_pool[c->cmdindex];
4913         struct ioaccel2_sg_element *curr_sg;
4914         int use_sg, i;
4915         struct scatterlist *sg;
4916         u64 addr64;
4917         u32 len;
4918         u32 total_len = 0;
4919
4920         if (!cmd->device)
4921                 return -1;
4922
4923         if (!cmd->device->hostdata)
4924                 return -1;
4925
4926         BUG_ON(scsi_sg_count(cmd) > h->maxsgentries);
4927
4928         if (is_zero_length_transfer(cdb)) {
4929                 warn_zero_length_transfer(h, cdb, cdb_len, __func__);
4930                 atomic_dec(&phys_disk->ioaccel_cmds_out);
4931                 return IO_ACCEL_INELIGIBLE;
4932         }
4933
4934         if (fixup_ioaccel_cdb(cdb, &cdb_len)) {
4935                 atomic_dec(&phys_disk->ioaccel_cmds_out);
4936                 return IO_ACCEL_INELIGIBLE;
4937         }
4938
4939         c->cmd_type = CMD_IOACCEL2;
4940         /* Adjust the DMA address to point to the accelerated command buffer */
4941         c->busaddr = (u32) h->ioaccel2_cmd_pool_dhandle +
4942                                 (c->cmdindex * sizeof(*cp));
4943         BUG_ON(c->busaddr & 0x0000007F);
4944
4945         memset(cp, 0, sizeof(*cp));
4946         cp->IU_type = IOACCEL2_IU_TYPE;
4947
4948         use_sg = scsi_dma_map(cmd);
4949         if (use_sg < 0) {
4950                 atomic_dec(&phys_disk->ioaccel_cmds_out);
4951                 return use_sg;
4952         }
4953
4954         if (use_sg) {
4955                 curr_sg = cp->sg;
4956                 if (use_sg > h->ioaccel_maxsg) {
4957                         addr64 = le64_to_cpu(
4958                                 h->ioaccel2_cmd_sg_list[c->cmdindex]->address);
4959                         curr_sg->address = cpu_to_le64(addr64);
4960                         curr_sg->length = 0;
4961                         curr_sg->reserved[0] = 0;
4962                         curr_sg->reserved[1] = 0;
4963                         curr_sg->reserved[2] = 0;
4964                         curr_sg->chain_indicator = IOACCEL2_CHAIN;
4965
4966                         curr_sg = h->ioaccel2_cmd_sg_list[c->cmdindex];
4967                 }
4968                 scsi_for_each_sg(cmd, sg, use_sg, i) {
4969                         addr64 = (u64) sg_dma_address(sg);
4970                         len  = sg_dma_len(sg);
4971                         total_len += len;
4972                         curr_sg->address = cpu_to_le64(addr64);
4973                         curr_sg->length = cpu_to_le32(len);
4974                         curr_sg->reserved[0] = 0;
4975                         curr_sg->reserved[1] = 0;
4976                         curr_sg->reserved[2] = 0;
4977                         curr_sg->chain_indicator = 0;
4978                         curr_sg++;
4979                 }
4980
4981                 /*
4982                  * Set the last s/g element bit
4983                  */
4984                 (curr_sg - 1)->chain_indicator = IOACCEL2_LAST_SG;
4985
4986                 switch (cmd->sc_data_direction) {
4987                 case DMA_TO_DEVICE:
4988                         cp->direction &= ~IOACCEL2_DIRECTION_MASK;
4989                         cp->direction |= IOACCEL2_DIR_DATA_OUT;
4990                         break;
4991                 case DMA_FROM_DEVICE:
4992                         cp->direction &= ~IOACCEL2_DIRECTION_MASK;
4993                         cp->direction |= IOACCEL2_DIR_DATA_IN;
4994                         break;
4995                 case DMA_NONE:
4996                         cp->direction &= ~IOACCEL2_DIRECTION_MASK;
4997                         cp->direction |= IOACCEL2_DIR_NO_DATA;
4998                         break;
4999                 default:
5000                         dev_err(&h->pdev->dev, "unknown data direction: %d\n",
5001                                 cmd->sc_data_direction);
5002                         BUG();
5003                         break;
5004                 }
5005         } else {
5006                 cp->direction &= ~IOACCEL2_DIRECTION_MASK;
5007                 cp->direction |= IOACCEL2_DIR_NO_DATA;
5008         }
5009
5010         /* Set encryption parameters, if necessary */
5011         set_encrypt_ioaccel2(h, c, cp);
5012
5013         cp->scsi_nexus = cpu_to_le32(ioaccel_handle);
5014         cp->Tag = cpu_to_le32(c->cmdindex << DIRECT_LOOKUP_SHIFT);
5015         memcpy(cp->cdb, cdb, sizeof(cp->cdb));
5016
5017         cp->data_len = cpu_to_le32(total_len);
5018         cp->err_ptr = cpu_to_le64(c->busaddr +
5019                         offsetof(struct io_accel2_cmd, error_data));
5020         cp->err_len = cpu_to_le32(sizeof(cp->error_data));
5021
5022         /* fill in sg elements */
5023         if (use_sg > h->ioaccel_maxsg) {
5024                 cp->sg_count = 1;
5025                 cp->sg[0].length = cpu_to_le32(use_sg * sizeof(cp->sg[0]));
5026                 if (hpsa_map_ioaccel2_sg_chain_block(h, cp, c)) {
5027                         atomic_dec(&phys_disk->ioaccel_cmds_out);
5028                         scsi_dma_unmap(cmd);
5029                         return -1;
5030                 }
5031         } else
5032                 cp->sg_count = (u8) use_sg;
5033
5034         if (phys_disk->in_reset) {
5035                 cmd->result = DID_RESET << 16;
5036                 return -1;
5037         }
5038
5039         enqueue_cmd_and_start_io(h, c);
5040         return 0;
5041 }
5042
5043 /*
5044  * Queue a command to the correct I/O accelerator path.
5045  */
5046 static int hpsa_scsi_ioaccel_queue_command(struct ctlr_info *h,
5047         struct CommandList *c, u32 ioaccel_handle, u8 *cdb, int cdb_len,
5048         u8 *scsi3addr, struct hpsa_scsi_dev_t *phys_disk)
5049 {
5050         if (!c->scsi_cmd->device)
5051                 return -1;
5052
5053         if (!c->scsi_cmd->device->hostdata)
5054                 return -1;
5055
5056         if (phys_disk->in_reset)
5057                 return -1;
5058
5059         /* Try to honor the device's queue depth */
5060         if (atomic_inc_return(&phys_disk->ioaccel_cmds_out) >
5061                                         phys_disk->queue_depth) {
5062                 atomic_dec(&phys_disk->ioaccel_cmds_out);
5063                 return IO_ACCEL_INELIGIBLE;
5064         }
5065         if (h->transMethod & CFGTBL_Trans_io_accel1)
5066                 return hpsa_scsi_ioaccel1_queue_command(h, c, ioaccel_handle,
5067                                                 cdb, cdb_len, scsi3addr,
5068                                                 phys_disk);
5069         else
5070                 return hpsa_scsi_ioaccel2_queue_command(h, c, ioaccel_handle,
5071                                                 cdb, cdb_len, scsi3addr,
5072                                                 phys_disk);
5073 }
5074
5075 static void raid_map_helper(struct raid_map_data *map,
5076                 int offload_to_mirror, u32 *map_index, u32 *current_group)
5077 {
5078         if (offload_to_mirror == 0)  {
5079                 /* use physical disk in the first mirrored group. */
5080                 *map_index %= le16_to_cpu(map->data_disks_per_row);
5081                 return;
5082         }
5083         do {
5084                 /* determine mirror group that *map_index indicates */
5085                 *current_group = *map_index /
5086                         le16_to_cpu(map->data_disks_per_row);
5087                 if (offload_to_mirror == *current_group)
5088                         continue;
5089                 if (*current_group < le16_to_cpu(map->layout_map_count) - 1) {
5090                         /* select map index from next group */
5091                         *map_index += le16_to_cpu(map->data_disks_per_row);
5092                         (*current_group)++;
5093                 } else {
5094                         /* select map index from first group */
5095                         *map_index %= le16_to_cpu(map->data_disks_per_row);
5096                         *current_group = 0;
5097                 }
5098         } while (offload_to_mirror != *current_group);
5099 }
5100
5101 /*
5102  * Attempt to perform offload RAID mapping for a logical volume I/O.
5103  */
5104 static int hpsa_scsi_ioaccel_raid_map(struct ctlr_info *h,
5105         struct CommandList *c)
5106 {
5107         struct scsi_cmnd *cmd = c->scsi_cmd;
5108         struct hpsa_scsi_dev_t *dev = cmd->device->hostdata;
5109         struct raid_map_data *map = &dev->raid_map;
5110         struct raid_map_disk_data *dd = &map->data[0];
5111         int is_write = 0;
5112         u32 map_index;
5113         u64 first_block, last_block;
5114         u32 block_cnt;
5115         u32 blocks_per_row;
5116         u64 first_row, last_row;
5117         u32 first_row_offset, last_row_offset;
5118         u32 first_column, last_column;
5119         u64 r0_first_row, r0_last_row;
5120         u32 r5or6_blocks_per_row;
5121         u64 r5or6_first_row, r5or6_last_row;
5122         u32 r5or6_first_row_offset, r5or6_last_row_offset;
5123         u32 r5or6_first_column, r5or6_last_column;
5124         u32 total_disks_per_row;
5125         u32 stripesize;
5126         u32 first_group, last_group, current_group;
5127         u32 map_row;
5128         u32 disk_handle;
5129         u64 disk_block;
5130         u32 disk_block_cnt;
5131         u8 cdb[16];
5132         u8 cdb_len;
5133         u16 strip_size;
5134 #if BITS_PER_LONG == 32
5135         u64 tmpdiv;
5136 #endif
5137         int offload_to_mirror;
5138
5139         if (!dev)
5140                 return -1;
5141
5142         if (dev->in_reset)
5143                 return -1;
5144
5145         /* check for valid opcode, get LBA and block count */
5146         switch (cmd->cmnd[0]) {
5147         case WRITE_6:
5148                 is_write = 1;
5149                 fallthrough;
5150         case READ_6:
5151                 first_block = (((cmd->cmnd[1] & 0x1F) << 16) |
5152                                 (cmd->cmnd[2] << 8) |
5153                                 cmd->cmnd[3]);
5154                 block_cnt = cmd->cmnd[4];
5155                 if (block_cnt == 0)
5156                         block_cnt = 256;
5157                 break;
5158         case WRITE_10:
5159                 is_write = 1;
5160                 fallthrough;
5161         case READ_10:
5162                 first_block =
5163                         (((u64) cmd->cmnd[2]) << 24) |
5164                         (((u64) cmd->cmnd[3]) << 16) |
5165                         (((u64) cmd->cmnd[4]) << 8) |
5166                         cmd->cmnd[5];
5167                 block_cnt =
5168                         (((u32) cmd->cmnd[7]) << 8) |
5169                         cmd->cmnd[8];
5170                 break;
5171         case WRITE_12:
5172                 is_write = 1;
5173                 fallthrough;
5174         case READ_12:
5175                 first_block =
5176                         (((u64) cmd->cmnd[2]) << 24) |
5177                         (((u64) cmd->cmnd[3]) << 16) |
5178                         (((u64) cmd->cmnd[4]) << 8) |
5179                         cmd->cmnd[5];
5180                 block_cnt =
5181                         (((u32) cmd->cmnd[6]) << 24) |
5182                         (((u32) cmd->cmnd[7]) << 16) |
5183                         (((u32) cmd->cmnd[8]) << 8) |
5184                 cmd->cmnd[9];
5185                 break;
5186         case WRITE_16:
5187                 is_write = 1;
5188                 fallthrough;
5189         case READ_16:
5190                 first_block =
5191                         (((u64) cmd->cmnd[2]) << 56) |
5192                         (((u64) cmd->cmnd[3]) << 48) |
5193                         (((u64) cmd->cmnd[4]) << 40) |
5194                         (((u64) cmd->cmnd[5]) << 32) |
5195                         (((u64) cmd->cmnd[6]) << 24) |
5196                         (((u64) cmd->cmnd[7]) << 16) |
5197                         (((u64) cmd->cmnd[8]) << 8) |
5198                         cmd->cmnd[9];
5199                 block_cnt =
5200                         (((u32) cmd->cmnd[10]) << 24) |
5201                         (((u32) cmd->cmnd[11]) << 16) |
5202                         (((u32) cmd->cmnd[12]) << 8) |
5203                         cmd->cmnd[13];
5204                 break;
5205         default:
5206                 return IO_ACCEL_INELIGIBLE; /* process via normal I/O path */
5207         }
5208         last_block = first_block + block_cnt - 1;
5209
5210         /* check for write to non-RAID-0 */
5211         if (is_write && dev->raid_level != 0)
5212                 return IO_ACCEL_INELIGIBLE;
5213
5214         /* check for invalid block or wraparound */
5215         if (last_block >= le64_to_cpu(map->volume_blk_cnt) ||
5216                 last_block < first_block)
5217                 return IO_ACCEL_INELIGIBLE;
5218
5219         /* calculate stripe information for the request */
5220         blocks_per_row = le16_to_cpu(map->data_disks_per_row) *
5221                                 le16_to_cpu(map->strip_size);
5222         strip_size = le16_to_cpu(map->strip_size);
5223 #if BITS_PER_LONG == 32
5224         tmpdiv = first_block;
5225         (void) do_div(tmpdiv, blocks_per_row);
5226         first_row = tmpdiv;
5227         tmpdiv = last_block;
5228         (void) do_div(tmpdiv, blocks_per_row);
5229         last_row = tmpdiv;
5230         first_row_offset = (u32) (first_block - (first_row * blocks_per_row));
5231         last_row_offset = (u32) (last_block - (last_row * blocks_per_row));
5232         tmpdiv = first_row_offset;
5233         (void) do_div(tmpdiv, strip_size);
5234         first_column = tmpdiv;
5235         tmpdiv = last_row_offset;
5236         (void) do_div(tmpdiv, strip_size);
5237         last_column = tmpdiv;
5238 #else
5239         first_row = first_block / blocks_per_row;
5240         last_row = last_block / blocks_per_row;
5241         first_row_offset = (u32) (first_block - (first_row * blocks_per_row));
5242         last_row_offset = (u32) (last_block - (last_row * blocks_per_row));
5243         first_column = first_row_offset / strip_size;
5244         last_column = last_row_offset / strip_size;
5245 #endif
5246
5247         /* if this isn't a single row/column then give to the controller */
5248         if ((first_row != last_row) || (first_column != last_column))
5249                 return IO_ACCEL_INELIGIBLE;
5250
5251         /* proceeding with driver mapping */
5252         total_disks_per_row = le16_to_cpu(map->data_disks_per_row) +
5253                                 le16_to_cpu(map->metadata_disks_per_row);
5254         map_row = ((u32)(first_row >> map->parity_rotation_shift)) %
5255                                 le16_to_cpu(map->row_cnt);
5256         map_index = (map_row * total_disks_per_row) + first_column;
5257
5258         switch (dev->raid_level) {
5259         case HPSA_RAID_0:
5260                 break; /* nothing special to do */
5261         case HPSA_RAID_1:
5262                 /* Handles load balance across RAID 1 members.
5263                  * (2-drive R1 and R10 with even # of drives.)
5264                  * Appropriate for SSDs, not optimal for HDDs
5265                  * Ensure we have the correct raid_map.
5266                  */
5267                 if (le16_to_cpu(map->layout_map_count) != 2) {
5268                         hpsa_turn_off_ioaccel_for_device(dev);
5269                         return IO_ACCEL_INELIGIBLE;
5270                 }
5271                 if (dev->offload_to_mirror)
5272                         map_index += le16_to_cpu(map->data_disks_per_row);
5273                 dev->offload_to_mirror = !dev->offload_to_mirror;
5274                 break;
5275         case HPSA_RAID_ADM:
5276                 /* Handles N-way mirrors  (R1-ADM)
5277                  * and R10 with # of drives divisible by 3.)
5278                  * Ensure we have the correct raid_map.
5279                  */
5280                 if (le16_to_cpu(map->layout_map_count) != 3) {
5281                         hpsa_turn_off_ioaccel_for_device(dev);
5282                         return IO_ACCEL_INELIGIBLE;
5283                 }
5284
5285                 offload_to_mirror = dev->offload_to_mirror;
5286                 raid_map_helper(map, offload_to_mirror,
5287                                 &map_index, &current_group);
5288                 /* set mirror group to use next time */
5289                 offload_to_mirror =
5290                         (offload_to_mirror >=
5291                         le16_to_cpu(map->layout_map_count) - 1)
5292                         ? 0 : offload_to_mirror + 1;
5293                 dev->offload_to_mirror = offload_to_mirror;
5294                 /* Avoid direct use of dev->offload_to_mirror within this
5295                  * function since multiple threads might simultaneously
5296                  * increment it beyond the range of dev->layout_map_count -1.
5297                  */
5298                 break;
5299         case HPSA_RAID_5:
5300         case HPSA_RAID_6:
5301                 if (le16_to_cpu(map->layout_map_count) <= 1)
5302                         break;
5303
5304                 /* Verify first and last block are in same RAID group */
5305                 r5or6_blocks_per_row =
5306                         le16_to_cpu(map->strip_size) *
5307                         le16_to_cpu(map->data_disks_per_row);
5308                 if (r5or6_blocks_per_row == 0) {
5309                         hpsa_turn_off_ioaccel_for_device(dev);
5310                         return IO_ACCEL_INELIGIBLE;
5311                 }
5312                 stripesize = r5or6_blocks_per_row *
5313                         le16_to_cpu(map->layout_map_count);
5314 #if BITS_PER_LONG == 32
5315                 tmpdiv = first_block;
5316                 first_group = do_div(tmpdiv, stripesize);
5317                 tmpdiv = first_group;
5318                 (void) do_div(tmpdiv, r5or6_blocks_per_row);
5319                 first_group = tmpdiv;
5320                 tmpdiv = last_block;
5321                 last_group = do_div(tmpdiv, stripesize);
5322                 tmpdiv = last_group;
5323                 (void) do_div(tmpdiv, r5or6_blocks_per_row);
5324                 last_group = tmpdiv;
5325 #else
5326                 first_group = (first_block % stripesize) / r5or6_blocks_per_row;
5327                 last_group = (last_block % stripesize) / r5or6_blocks_per_row;
5328 #endif
5329                 if (first_group != last_group)
5330                         return IO_ACCEL_INELIGIBLE;
5331
5332                 /* Verify request is in a single row of RAID 5/6 */
5333 #if BITS_PER_LONG == 32
5334                 tmpdiv = first_block;
5335                 (void) do_div(tmpdiv, stripesize);
5336                 first_row = r5or6_first_row = r0_first_row = tmpdiv;
5337                 tmpdiv = last_block;
5338                 (void) do_div(tmpdiv, stripesize);
5339                 r5or6_last_row = r0_last_row = tmpdiv;
5340 #else
5341                 first_row = r5or6_first_row = r0_first_row =
5342                                                 first_block / stripesize;
5343                 r5or6_last_row = r0_last_row = last_block / stripesize;
5344 #endif
5345                 if (r5or6_first_row != r5or6_last_row)
5346                         return IO_ACCEL_INELIGIBLE;
5347
5348
5349                 /* Verify request is in a single column */
5350 #if BITS_PER_LONG == 32
5351                 tmpdiv = first_block;
5352                 first_row_offset = do_div(tmpdiv, stripesize);
5353                 tmpdiv = first_row_offset;
5354                 first_row_offset = (u32) do_div(tmpdiv, r5or6_blocks_per_row);
5355                 r5or6_first_row_offset = first_row_offset;
5356                 tmpdiv = last_block;
5357                 r5or6_last_row_offset = do_div(tmpdiv, stripesize);
5358                 tmpdiv = r5or6_last_row_offset;
5359                 r5or6_last_row_offset = do_div(tmpdiv, r5or6_blocks_per_row);
5360                 tmpdiv = r5or6_first_row_offset;
5361                 (void) do_div(tmpdiv, map->strip_size);
5362                 first_column = r5or6_first_column = tmpdiv;
5363                 tmpdiv = r5or6_last_row_offset;
5364                 (void) do_div(tmpdiv, map->strip_size);
5365                 r5or6_last_column = tmpdiv;
5366 #else
5367                 first_row_offset = r5or6_first_row_offset =
5368                         (u32)((first_block % stripesize) %
5369                                                 r5or6_blocks_per_row);
5370
5371                 r5or6_last_row_offset =
5372                         (u32)((last_block % stripesize) %
5373                                                 r5or6_blocks_per_row);
5374
5375                 first_column = r5or6_first_column =
5376                         r5or6_first_row_offset / le16_to_cpu(map->strip_size);
5377                 r5or6_last_column =
5378                         r5or6_last_row_offset / le16_to_cpu(map->strip_size);
5379 #endif
5380                 if (r5or6_first_column != r5or6_last_column)
5381                         return IO_ACCEL_INELIGIBLE;
5382
5383                 /* Request is eligible */
5384                 map_row = ((u32)(first_row >> map->parity_rotation_shift)) %
5385                         le16_to_cpu(map->row_cnt);
5386
5387                 map_index = (first_group *
5388                         (le16_to_cpu(map->row_cnt) * total_disks_per_row)) +
5389                         (map_row * total_disks_per_row) + first_column;
5390                 break;
5391         default:
5392                 return IO_ACCEL_INELIGIBLE;
5393         }
5394
5395         if (unlikely(map_index >= RAID_MAP_MAX_ENTRIES))
5396                 return IO_ACCEL_INELIGIBLE;
5397
5398         c->phys_disk = dev->phys_disk[map_index];
5399         if (!c->phys_disk)
5400                 return IO_ACCEL_INELIGIBLE;
5401
5402         disk_handle = dd[map_index].ioaccel_handle;
5403         disk_block = le64_to_cpu(map->disk_starting_blk) +
5404                         first_row * le16_to_cpu(map->strip_size) +
5405                         (first_row_offset - first_column *
5406                         le16_to_cpu(map->strip_size));
5407         disk_block_cnt = block_cnt;
5408
5409         /* handle differing logical/physical block sizes */
5410         if (map->phys_blk_shift) {
5411                 disk_block <<= map->phys_blk_shift;
5412                 disk_block_cnt <<= map->phys_blk_shift;
5413         }
5414         BUG_ON(disk_block_cnt > 0xffff);
5415
5416         /* build the new CDB for the physical disk I/O */
5417         if (disk_block > 0xffffffff) {
5418                 cdb[0] = is_write ? WRITE_16 : READ_16;
5419                 cdb[1] = 0;
5420                 cdb[2] = (u8) (disk_block >> 56);
5421                 cdb[3] = (u8) (disk_block >> 48);
5422                 cdb[4] = (u8) (disk_block >> 40);
5423                 cdb[5] = (u8) (disk_block >> 32);
5424                 cdb[6] = (u8) (disk_block >> 24);
5425                 cdb[7] = (u8) (disk_block >> 16);
5426                 cdb[8] = (u8) (disk_block >> 8);
5427                 cdb[9] = (u8) (disk_block);
5428                 cdb[10] = (u8) (disk_block_cnt >> 24);
5429                 cdb[11] = (u8) (disk_block_cnt >> 16);
5430                 cdb[12] = (u8) (disk_block_cnt >> 8);
5431                 cdb[13] = (u8) (disk_block_cnt);
5432                 cdb[14] = 0;
5433                 cdb[15] = 0;
5434                 cdb_len = 16;
5435         } else {
5436                 cdb[0] = is_write ? WRITE_10 : READ_10;
5437                 cdb[1] = 0;
5438                 cdb[2] = (u8) (disk_block >> 24);
5439                 cdb[3] = (u8) (disk_block >> 16);
5440                 cdb[4] = (u8) (disk_block >> 8);
5441                 cdb[5] = (u8) (disk_block);
5442                 cdb[6] = 0;
5443                 cdb[7] = (u8) (disk_block_cnt >> 8);
5444                 cdb[8] = (u8) (disk_block_cnt);
5445                 cdb[9] = 0;
5446                 cdb_len = 10;
5447         }
5448         return hpsa_scsi_ioaccel_queue_command(h, c, disk_handle, cdb, cdb_len,
5449                                                 dev->scsi3addr,
5450                                                 dev->phys_disk[map_index]);
5451 }
5452
5453 /*
5454  * Submit commands down the "normal" RAID stack path
5455  * All callers to hpsa_ciss_submit must check lockup_detected
5456  * beforehand, before (opt.) and after calling cmd_alloc
5457  */
5458 static int hpsa_ciss_submit(struct ctlr_info *h,
5459         struct CommandList *c, struct scsi_cmnd *cmd,
5460         struct hpsa_scsi_dev_t *dev)
5461 {
5462         cmd->host_scribble = (unsigned char *) c;
5463         c->cmd_type = CMD_SCSI;
5464         c->scsi_cmd = cmd;
5465         c->Header.ReplyQueue = 0;  /* unused in simple mode */
5466         memcpy(&c->Header.LUN.LunAddrBytes[0], &dev->scsi3addr[0], 8);
5467         c->Header.tag = cpu_to_le64((c->cmdindex << DIRECT_LOOKUP_SHIFT));
5468
5469         /* Fill in the request block... */
5470
5471         c->Request.Timeout = 0;
5472         BUG_ON(cmd->cmd_len > sizeof(c->Request.CDB));
5473         c->Request.CDBLen = cmd->cmd_len;
5474         memcpy(c->Request.CDB, cmd->cmnd, cmd->cmd_len);
5475         switch (cmd->sc_data_direction) {
5476         case DMA_TO_DEVICE:
5477                 c->Request.type_attr_dir =
5478                         TYPE_ATTR_DIR(TYPE_CMD, ATTR_SIMPLE, XFER_WRITE);
5479                 break;
5480         case DMA_FROM_DEVICE:
5481                 c->Request.type_attr_dir =
5482                         TYPE_ATTR_DIR(TYPE_CMD, ATTR_SIMPLE, XFER_READ);
5483                 break;
5484         case DMA_NONE:
5485                 c->Request.type_attr_dir =
5486                         TYPE_ATTR_DIR(TYPE_CMD, ATTR_SIMPLE, XFER_NONE);
5487                 break;
5488         case DMA_BIDIRECTIONAL:
5489                 /* This can happen if a buggy application does a scsi passthru
5490                  * and sets both inlen and outlen to non-zero. ( see
5491                  * ../scsi/scsi_ioctl.c:scsi_ioctl_send_command() )
5492                  */
5493
5494                 c->Request.type_attr_dir =
5495                         TYPE_ATTR_DIR(TYPE_CMD, ATTR_SIMPLE, XFER_RSVD);
5496                 /* This is technically wrong, and hpsa controllers should
5497                  * reject it with CMD_INVALID, which is the most correct
5498                  * response, but non-fibre backends appear to let it
5499                  * slide by, and give the same results as if this field
5500                  * were set correctly.  Either way is acceptable for
5501                  * our purposes here.
5502                  */
5503
5504                 break;
5505
5506         default:
5507                 dev_err(&h->pdev->dev, "unknown data direction: %d\n",
5508                         cmd->sc_data_direction);
5509                 BUG();
5510                 break;
5511         }
5512
5513         if (hpsa_scatter_gather(h, c, cmd) < 0) { /* Fill SG list */
5514                 hpsa_cmd_resolve_and_free(h, c);
5515                 return SCSI_MLQUEUE_HOST_BUSY;
5516         }
5517
5518         if (dev->in_reset) {
5519                 hpsa_cmd_resolve_and_free(h, c);
5520                 return SCSI_MLQUEUE_HOST_BUSY;
5521         }
5522
5523         c->device = dev;
5524
5525         enqueue_cmd_and_start_io(h, c);
5526         /* the cmd'll come back via intr handler in complete_scsi_command()  */
5527         return 0;
5528 }
5529
5530 static void hpsa_cmd_init(struct ctlr_info *h, int index,
5531                                 struct CommandList *c)
5532 {
5533         dma_addr_t cmd_dma_handle, err_dma_handle;
5534
5535         /* Zero out all of commandlist except the last field, refcount */
5536         memset(c, 0, offsetof(struct CommandList, refcount));
5537         c->Header.tag = cpu_to_le64((u64) (index << DIRECT_LOOKUP_SHIFT));
5538         cmd_dma_handle = h->cmd_pool_dhandle + index * sizeof(*c);
5539         c->err_info = h->errinfo_pool + index;
5540         memset(c->err_info, 0, sizeof(*c->err_info));
5541         err_dma_handle = h->errinfo_pool_dhandle
5542             + index * sizeof(*c->err_info);
5543         c->cmdindex = index;
5544         c->busaddr = (u32) cmd_dma_handle;
5545         c->ErrDesc.Addr = cpu_to_le64((u64) err_dma_handle);
5546         c->ErrDesc.Len = cpu_to_le32((u32) sizeof(*c->err_info));
5547         c->h = h;
5548         c->scsi_cmd = SCSI_CMD_IDLE;
5549 }
5550
5551 static void hpsa_preinitialize_commands(struct ctlr_info *h)
5552 {
5553         int i;
5554
5555         for (i = 0; i < h->nr_cmds; i++) {
5556                 struct CommandList *c = h->cmd_pool + i;
5557
5558                 hpsa_cmd_init(h, i, c);
5559                 atomic_set(&c->refcount, 0);
5560         }
5561 }
5562
5563 static inline void hpsa_cmd_partial_init(struct ctlr_info *h, int index,
5564                                 struct CommandList *c)
5565 {
5566         dma_addr_t cmd_dma_handle = h->cmd_pool_dhandle + index * sizeof(*c);
5567
5568         BUG_ON(c->cmdindex != index);
5569
5570         memset(c->Request.CDB, 0, sizeof(c->Request.CDB));
5571         memset(c->err_info, 0, sizeof(*c->err_info));
5572         c->busaddr = (u32) cmd_dma_handle;
5573 }
5574
5575 static int hpsa_ioaccel_submit(struct ctlr_info *h,
5576                 struct CommandList *c, struct scsi_cmnd *cmd,
5577                 bool retry)
5578 {
5579         struct hpsa_scsi_dev_t *dev = cmd->device->hostdata;
5580         int rc = IO_ACCEL_INELIGIBLE;
5581
5582         if (!dev)
5583                 return SCSI_MLQUEUE_HOST_BUSY;
5584
5585         if (dev->in_reset)
5586                 return SCSI_MLQUEUE_HOST_BUSY;
5587
5588         if (hpsa_simple_mode)
5589                 return IO_ACCEL_INELIGIBLE;
5590
5591         cmd->host_scribble = (unsigned char *) c;
5592
5593         if (dev->offload_enabled) {
5594                 hpsa_cmd_init(h, c->cmdindex, c); /* Zeroes out all fields */
5595                 c->cmd_type = CMD_SCSI;
5596                 c->scsi_cmd = cmd;
5597                 c->device = dev;
5598                 if (retry) /* Resubmit but do not increment device->commands_outstanding. */
5599                         c->retry_pending = true;
5600                 rc = hpsa_scsi_ioaccel_raid_map(h, c);
5601                 if (rc < 0)     /* scsi_dma_map failed. */
5602                         rc = SCSI_MLQUEUE_HOST_BUSY;
5603         } else if (dev->hba_ioaccel_enabled) {
5604                 hpsa_cmd_init(h, c->cmdindex, c); /* Zeroes out all fields */
5605                 c->cmd_type = CMD_SCSI;
5606                 c->scsi_cmd = cmd;
5607                 c->device = dev;
5608                 if (retry) /* Resubmit but do not increment device->commands_outstanding. */
5609                         c->retry_pending = true;
5610                 rc = hpsa_scsi_ioaccel_direct_map(h, c);
5611                 if (rc < 0)     /* scsi_dma_map failed. */
5612                         rc = SCSI_MLQUEUE_HOST_BUSY;
5613         }
5614         return rc;
5615 }
5616
5617 static void hpsa_command_resubmit_worker(struct work_struct *work)
5618 {
5619         struct scsi_cmnd *cmd;
5620         struct hpsa_scsi_dev_t *dev;
5621         struct CommandList *c = container_of(work, struct CommandList, work);
5622
5623         cmd = c->scsi_cmd;
5624         dev = cmd->device->hostdata;
5625         if (!dev) {
5626                 cmd->result = DID_NO_CONNECT << 16;
5627                 return hpsa_cmd_free_and_done(c->h, c, cmd);
5628         }
5629
5630         if (dev->in_reset) {
5631                 cmd->result = DID_RESET << 16;
5632                 return hpsa_cmd_free_and_done(c->h, c, cmd);
5633         }
5634
5635         if (c->cmd_type == CMD_IOACCEL2) {
5636                 struct ctlr_info *h = c->h;
5637                 struct io_accel2_cmd *c2 = &h->ioaccel2_cmd_pool[c->cmdindex];
5638                 int rc;
5639
5640                 if (c2->error_data.serv_response ==
5641                                 IOACCEL2_STATUS_SR_TASK_COMP_SET_FULL) {
5642                         /* Resubmit with the retry_pending flag set. */
5643                         rc = hpsa_ioaccel_submit(h, c, cmd, true);
5644                         if (rc == 0)
5645                                 return;
5646                         if (rc == SCSI_MLQUEUE_HOST_BUSY) {
5647                                 /*
5648                                  * If we get here, it means dma mapping failed.
5649                                  * Try again via scsi mid layer, which will
5650                                  * then get SCSI_MLQUEUE_HOST_BUSY.
5651                                  */
5652                                 cmd->result = DID_IMM_RETRY << 16;
5653                                 return hpsa_cmd_free_and_done(h, c, cmd);
5654                         }
5655                         /* else, fall thru and resubmit down CISS path */
5656                 }
5657         }
5658         hpsa_cmd_partial_init(c->h, c->cmdindex, c);
5659         /*
5660          * Here we have not come in though queue_command, so we
5661          * can set the retry_pending flag to true for a driver initiated
5662          * retry attempt (I.E. not a SML retry).
5663          * I.E. We are submitting a driver initiated retry.
5664          * Note: hpsa_ciss_submit does not zero out the command fields like
5665          *       ioaccel submit does.
5666          */
5667         c->retry_pending = true;
5668         if (hpsa_ciss_submit(c->h, c, cmd, dev)) {
5669                 /*
5670                  * If we get here, it means dma mapping failed. Try
5671                  * again via scsi mid layer, which will then get
5672                  * SCSI_MLQUEUE_HOST_BUSY.
5673                  *
5674                  * hpsa_ciss_submit will have already freed c
5675                  * if it encountered a dma mapping failure.
5676                  */
5677                 cmd->result = DID_IMM_RETRY << 16;
5678                 scsi_done(cmd);
5679         }
5680 }
5681
5682 /* Running in struct Scsi_Host->host_lock less mode */
5683 static int hpsa_scsi_queue_command(struct Scsi_Host *sh, struct scsi_cmnd *cmd)
5684 {
5685         struct ctlr_info *h;
5686         struct hpsa_scsi_dev_t *dev;
5687         struct CommandList *c;
5688         int rc = 0;
5689
5690         /* Get the ptr to our adapter structure out of cmd->host. */
5691         h = sdev_to_hba(cmd->device);
5692
5693         BUG_ON(scsi_cmd_to_rq(cmd)->tag < 0);
5694
5695         dev = cmd->device->hostdata;
5696         if (!dev) {
5697                 cmd->result = DID_NO_CONNECT << 16;
5698                 scsi_done(cmd);
5699                 return 0;
5700         }
5701
5702         if (dev->removed) {
5703                 cmd->result = DID_NO_CONNECT << 16;
5704                 scsi_done(cmd);
5705                 return 0;
5706         }
5707
5708         if (unlikely(lockup_detected(h))) {
5709                 cmd->result = DID_NO_CONNECT << 16;
5710                 scsi_done(cmd);
5711                 return 0;
5712         }
5713
5714         if (dev->in_reset)
5715                 return SCSI_MLQUEUE_DEVICE_BUSY;
5716
5717         c = cmd_tagged_alloc(h, cmd);
5718         if (c == NULL)
5719                 return SCSI_MLQUEUE_DEVICE_BUSY;
5720
5721         /*
5722          * This is necessary because the SML doesn't zero out this field during
5723          * error recovery.
5724          */
5725         cmd->result = 0;
5726
5727         /*
5728          * Call alternate submit routine for I/O accelerated commands.
5729          * Retries always go down the normal I/O path.
5730          * Note: If cmd->retries is non-zero, then this is a SML
5731          *       initiated retry and not a driver initiated retry.
5732          *       This command has been obtained from cmd_tagged_alloc
5733          *       and is therefore a brand-new command.
5734          */
5735         if (likely(cmd->retries == 0 &&
5736                         !blk_rq_is_passthrough(scsi_cmd_to_rq(cmd)) &&
5737                         h->acciopath_status)) {
5738                 /* Submit with the retry_pending flag unset. */
5739                 rc = hpsa_ioaccel_submit(h, c, cmd, false);
5740                 if (rc == 0)
5741                         return 0;
5742                 if (rc == SCSI_MLQUEUE_HOST_BUSY) {
5743                         hpsa_cmd_resolve_and_free(h, c);
5744                         return SCSI_MLQUEUE_HOST_BUSY;
5745                 }
5746         }
5747         return hpsa_ciss_submit(h, c, cmd, dev);
5748 }
5749
5750 static void hpsa_scan_complete(struct ctlr_info *h)
5751 {
5752         unsigned long flags;
5753
5754         spin_lock_irqsave(&h->scan_lock, flags);
5755         h->scan_finished = 1;
5756         wake_up(&h->scan_wait_queue);
5757         spin_unlock_irqrestore(&h->scan_lock, flags);
5758 }
5759
5760 static void hpsa_scan_start(struct Scsi_Host *sh)
5761 {
5762         struct ctlr_info *h = shost_to_hba(sh);
5763         unsigned long flags;
5764
5765         /*
5766          * Don't let rescans be initiated on a controller known to be locked
5767          * up.  If the controller locks up *during* a rescan, that thread is
5768          * probably hosed, but at least we can prevent new rescan threads from
5769          * piling up on a locked up controller.
5770          */
5771         if (unlikely(lockup_detected(h)))
5772                 return hpsa_scan_complete(h);
5773
5774         /*
5775          * If a scan is already waiting to run, no need to add another
5776          */
5777         spin_lock_irqsave(&h->scan_lock, flags);
5778         if (h->scan_waiting) {
5779                 spin_unlock_irqrestore(&h->scan_lock, flags);
5780                 return;
5781         }
5782
5783         spin_unlock_irqrestore(&h->scan_lock, flags);
5784
5785         /* wait until any scan already in progress is finished. */
5786         while (1) {
5787                 spin_lock_irqsave(&h->scan_lock, flags);
5788                 if (h->scan_finished)
5789                         break;
5790                 h->scan_waiting = 1;
5791                 spin_unlock_irqrestore(&h->scan_lock, flags);
5792                 wait_event(h->scan_wait_queue, h->scan_finished);
5793                 /* Note: We don't need to worry about a race between this
5794                  * thread and driver unload because the midlayer will
5795                  * have incremented the reference count, so unload won't
5796                  * happen if we're in here.
5797                  */
5798         }
5799         h->scan_finished = 0; /* mark scan as in progress */
5800         h->scan_waiting = 0;
5801         spin_unlock_irqrestore(&h->scan_lock, flags);
5802
5803         if (unlikely(lockup_detected(h)))
5804                 return hpsa_scan_complete(h);
5805
5806         /*
5807          * Do the scan after a reset completion
5808          */
5809         spin_lock_irqsave(&h->reset_lock, flags);
5810         if (h->reset_in_progress) {
5811                 h->drv_req_rescan = 1;
5812                 spin_unlock_irqrestore(&h->reset_lock, flags);
5813                 hpsa_scan_complete(h);
5814                 return;
5815         }
5816         spin_unlock_irqrestore(&h->reset_lock, flags);
5817
5818         hpsa_update_scsi_devices(h);
5819
5820         hpsa_scan_complete(h);
5821 }
5822
5823 static int hpsa_change_queue_depth(struct scsi_device *sdev, int qdepth)
5824 {
5825         struct hpsa_scsi_dev_t *logical_drive = sdev->hostdata;
5826
5827         if (!logical_drive)
5828                 return -ENODEV;
5829
5830         if (qdepth < 1)
5831                 qdepth = 1;
5832         else if (qdepth > logical_drive->queue_depth)
5833                 qdepth = logical_drive->queue_depth;
5834
5835         return scsi_change_queue_depth(sdev, qdepth);
5836 }
5837
5838 static int hpsa_scan_finished(struct Scsi_Host *sh,
5839         unsigned long elapsed_time)
5840 {
5841         struct ctlr_info *h = shost_to_hba(sh);
5842         unsigned long flags;
5843         int finished;
5844
5845         spin_lock_irqsave(&h->scan_lock, flags);
5846         finished = h->scan_finished;
5847         spin_unlock_irqrestore(&h->scan_lock, flags);
5848         return finished;
5849 }
5850
5851 static int hpsa_scsi_host_alloc(struct ctlr_info *h)
5852 {
5853         struct Scsi_Host *sh;
5854
5855         sh = scsi_host_alloc(&hpsa_driver_template, sizeof(h));
5856         if (sh == NULL) {
5857                 dev_err(&h->pdev->dev, "scsi_host_alloc failed\n");
5858                 return -ENOMEM;
5859         }
5860
5861         sh->io_port = 0;
5862         sh->n_io_port = 0;
5863         sh->this_id = -1;
5864         sh->max_channel = 3;
5865         sh->max_cmd_len = MAX_COMMAND_SIZE;
5866         sh->max_lun = HPSA_MAX_LUN;
5867         sh->max_id = HPSA_MAX_LUN;
5868         sh->can_queue = h->nr_cmds - HPSA_NRESERVED_CMDS;
5869         sh->cmd_per_lun = sh->can_queue;
5870         sh->sg_tablesize = h->maxsgentries;
5871         sh->transportt = hpsa_sas_transport_template;
5872         sh->hostdata[0] = (unsigned long) h;
5873         sh->irq = pci_irq_vector(h->pdev, 0);
5874         sh->unique_id = sh->irq;
5875
5876         h->scsi_host = sh;
5877         return 0;
5878 }
5879
5880 static int hpsa_scsi_add_host(struct ctlr_info *h)
5881 {
5882         int rv;
5883
5884         rv = scsi_add_host(h->scsi_host, &h->pdev->dev);
5885         if (rv) {
5886                 dev_err(&h->pdev->dev, "scsi_add_host failed\n");
5887                 return rv;
5888         }
5889         scsi_scan_host(h->scsi_host);
5890         return 0;
5891 }
5892
5893 /*
5894  * The block layer has already gone to the trouble of picking out a unique,
5895  * small-integer tag for this request.  We use an offset from that value as
5896  * an index to select our command block.  (The offset allows us to reserve the
5897  * low-numbered entries for our own uses.)
5898  */
5899 static int hpsa_get_cmd_index(struct scsi_cmnd *scmd)
5900 {
5901         int idx = scsi_cmd_to_rq(scmd)->tag;
5902
5903         if (idx < 0)
5904                 return idx;
5905
5906         /* Offset to leave space for internal cmds. */
5907         return idx += HPSA_NRESERVED_CMDS;
5908 }
5909
5910 /*
5911  * Send a TEST_UNIT_READY command to the specified LUN using the specified
5912  * reply queue; returns zero if the unit is ready, and non-zero otherwise.
5913  */
5914 static int hpsa_send_test_unit_ready(struct ctlr_info *h,
5915                                 struct CommandList *c, unsigned char lunaddr[],
5916                                 int reply_queue)
5917 {
5918         int rc;
5919
5920         /* Send the Test Unit Ready, fill_cmd can't fail, no mapping */
5921         (void) fill_cmd(c, TEST_UNIT_READY, h,
5922                         NULL, 0, 0, lunaddr, TYPE_CMD);
5923         rc = hpsa_scsi_do_simple_cmd(h, c, reply_queue, NO_TIMEOUT);
5924         if (rc)
5925                 return rc;
5926         /* no unmap needed here because no data xfer. */
5927
5928         /* Check if the unit is already ready. */
5929         if (c->err_info->CommandStatus == CMD_SUCCESS)
5930                 return 0;
5931
5932         /*
5933          * The first command sent after reset will receive "unit attention" to
5934          * indicate that the LUN has been reset...this is actually what we're
5935          * looking for (but, success is good too).
5936          */
5937         if (c->err_info->CommandStatus == CMD_TARGET_STATUS &&
5938                 c->err_info->ScsiStatus == SAM_STAT_CHECK_CONDITION &&
5939                         (c->err_info->SenseInfo[2] == NO_SENSE ||
5940                          c->err_info->SenseInfo[2] == UNIT_ATTENTION))
5941                 return 0;
5942
5943         return 1;
5944 }
5945
5946 /*
5947  * Wait for a TEST_UNIT_READY command to complete, retrying as necessary;
5948  * returns zero when the unit is ready, and non-zero when giving up.
5949  */
5950 static int hpsa_wait_for_test_unit_ready(struct ctlr_info *h,
5951                                 struct CommandList *c,
5952                                 unsigned char lunaddr[], int reply_queue)
5953 {
5954         int rc;
5955         int count = 0;
5956         int waittime = 1; /* seconds */
5957
5958         /* Send test unit ready until device ready, or give up. */
5959         for (count = 0; count < HPSA_TUR_RETRY_LIMIT; count++) {
5960
5961                 /*
5962                  * Wait for a bit.  do this first, because if we send
5963                  * the TUR right away, the reset will just abort it.
5964                  */
5965                 msleep(1000 * waittime);
5966
5967                 rc = hpsa_send_test_unit_ready(h, c, lunaddr, reply_queue);
5968                 if (!rc)
5969                         break;
5970
5971                 /* Increase wait time with each try, up to a point. */
5972                 if (waittime < HPSA_MAX_WAIT_INTERVAL_SECS)
5973                         waittime *= 2;
5974
5975                 dev_warn(&h->pdev->dev,
5976                          "waiting %d secs for device to become ready.\n",
5977                          waittime);
5978         }
5979
5980         return rc;
5981 }
5982
5983 static int wait_for_device_to_become_ready(struct ctlr_info *h,
5984                                            unsigned char lunaddr[],
5985                                            int reply_queue)
5986 {
5987         int first_queue;
5988         int last_queue;
5989         int rq;
5990         int rc = 0;
5991         struct CommandList *c;
5992
5993         c = cmd_alloc(h);
5994
5995         /*
5996          * If no specific reply queue was requested, then send the TUR
5997          * repeatedly, requesting a reply on each reply queue; otherwise execute
5998          * the loop exactly once using only the specified queue.
5999          */
6000         if (reply_queue == DEFAULT_REPLY_QUEUE) {
6001                 first_queue = 0;
6002                 last_queue = h->nreply_queues - 1;
6003         } else {
6004                 first_queue = reply_queue;
6005                 last_queue = reply_queue;
6006         }
6007
6008         for (rq = first_queue; rq <= last_queue; rq++) {
6009                 rc = hpsa_wait_for_test_unit_ready(h, c, lunaddr, rq);
6010                 if (rc)
6011                         break;
6012         }
6013
6014         if (rc)
6015                 dev_warn(&h->pdev->dev, "giving up on device.\n");
6016         else
6017                 dev_warn(&h->pdev->dev, "device is ready.\n");
6018
6019         cmd_free(h, c);
6020         return rc;
6021 }
6022
6023 /* Need at least one of these error handlers to keep ../scsi/hosts.c from
6024  * complaining.  Doing a host- or bus-reset can't do anything good here.
6025  */
6026 static int hpsa_eh_device_reset_handler(struct scsi_cmnd *scsicmd)
6027 {
6028         int rc = SUCCESS;
6029         int i;
6030         struct ctlr_info *h;
6031         struct hpsa_scsi_dev_t *dev = NULL;
6032         u8 reset_type;
6033         char msg[48];
6034         unsigned long flags;
6035
6036         /* find the controller to which the command to be aborted was sent */
6037         h = sdev_to_hba(scsicmd->device);
6038         if (h == NULL) /* paranoia */
6039                 return FAILED;
6040
6041         spin_lock_irqsave(&h->reset_lock, flags);
6042         h->reset_in_progress = 1;
6043         spin_unlock_irqrestore(&h->reset_lock, flags);
6044
6045         if (lockup_detected(h)) {
6046                 rc = FAILED;
6047                 goto return_reset_status;
6048         }
6049
6050         dev = scsicmd->device->hostdata;
6051         if (!dev) {
6052                 dev_err(&h->pdev->dev, "%s: device lookup failed\n", __func__);
6053                 rc = FAILED;
6054                 goto return_reset_status;
6055         }
6056
6057         if (dev->devtype == TYPE_ENCLOSURE) {
6058                 rc = SUCCESS;
6059                 goto return_reset_status;
6060         }
6061
6062         /* if controller locked up, we can guarantee command won't complete */
6063         if (lockup_detected(h)) {
6064                 snprintf(msg, sizeof(msg),
6065                          "cmd %d RESET FAILED, lockup detected",
6066                          hpsa_get_cmd_index(scsicmd));
6067                 hpsa_show_dev_msg(KERN_WARNING, h, dev, msg);
6068                 rc = FAILED;
6069                 goto return_reset_status;
6070         }
6071
6072         /* this reset request might be the result of a lockup; check */
6073         if (detect_controller_lockup(h)) {
6074                 snprintf(msg, sizeof(msg),
6075                          "cmd %d RESET FAILED, new lockup detected",
6076                          hpsa_get_cmd_index(scsicmd));
6077                 hpsa_show_dev_msg(KERN_WARNING, h, dev, msg);
6078                 rc = FAILED;
6079                 goto return_reset_status;
6080         }
6081
6082         /* Do not attempt on controller */
6083         if (is_hba_lunid(dev->scsi3addr)) {
6084                 rc = SUCCESS;
6085                 goto return_reset_status;
6086         }
6087
6088         if (is_logical_dev_addr_mode(dev->scsi3addr))
6089                 reset_type = HPSA_DEVICE_RESET_MSG;
6090         else
6091                 reset_type = HPSA_PHYS_TARGET_RESET;
6092
6093         sprintf(msg, "resetting %s",
6094                 reset_type == HPSA_DEVICE_RESET_MSG ? "logical " : "physical ");
6095         hpsa_show_dev_msg(KERN_WARNING, h, dev, msg);
6096
6097         /*
6098          * wait to see if any commands will complete before sending reset
6099          */
6100         dev->in_reset = true; /* block any new cmds from OS for this device */
6101         for (i = 0; i < 10; i++) {
6102                 if (atomic_read(&dev->commands_outstanding) > 0)
6103                         msleep(1000);
6104                 else
6105                         break;
6106         }
6107
6108         /* send a reset to the SCSI LUN which the command was sent to */
6109         rc = hpsa_do_reset(h, dev, reset_type, DEFAULT_REPLY_QUEUE);
6110         if (rc == 0)
6111                 rc = SUCCESS;
6112         else
6113                 rc = FAILED;
6114
6115         sprintf(msg, "reset %s %s",
6116                 reset_type == HPSA_DEVICE_RESET_MSG ? "logical " : "physical ",
6117                 rc == SUCCESS ? "completed successfully" : "failed");
6118         hpsa_show_dev_msg(KERN_WARNING, h, dev, msg);
6119
6120 return_reset_status:
6121         spin_lock_irqsave(&h->reset_lock, flags);
6122         h->reset_in_progress = 0;
6123         if (dev)
6124                 dev->in_reset = false;
6125         spin_unlock_irqrestore(&h->reset_lock, flags);
6126         return rc;
6127 }
6128
6129 /*
6130  * For operations with an associated SCSI command, a command block is allocated
6131  * at init, and managed by cmd_tagged_alloc() and cmd_tagged_free() using the
6132  * block request tag as an index into a table of entries.  cmd_tagged_free() is
6133  * the complement, although cmd_free() may be called instead.
6134  * This function is only called for new requests from queue_command.
6135  */
6136 static struct CommandList *cmd_tagged_alloc(struct ctlr_info *h,
6137                                             struct scsi_cmnd *scmd)
6138 {
6139         int idx = hpsa_get_cmd_index(scmd);
6140         struct CommandList *c = h->cmd_pool + idx;
6141
6142         if (idx < HPSA_NRESERVED_CMDS || idx >= h->nr_cmds) {
6143                 dev_err(&h->pdev->dev, "Bad block tag: %d not in [%d..%d]\n",
6144                         idx, HPSA_NRESERVED_CMDS, h->nr_cmds - 1);
6145                 /* The index value comes from the block layer, so if it's out of
6146                  * bounds, it's probably not our bug.
6147                  */
6148                 BUG();
6149         }
6150
6151         if (unlikely(!hpsa_is_cmd_idle(c))) {
6152                 /*
6153                  * We expect that the SCSI layer will hand us a unique tag
6154                  * value.  Thus, there should never be a collision here between
6155                  * two requests...because if the selected command isn't idle
6156                  * then someone is going to be very disappointed.
6157                  */
6158                 if (idx != h->last_collision_tag) { /* Print once per tag */
6159                         dev_warn(&h->pdev->dev,
6160                                 "%s: tag collision (tag=%d)\n", __func__, idx);
6161                         if (scmd)
6162                                 scsi_print_command(scmd);
6163                         h->last_collision_tag = idx;
6164                 }
6165                 return NULL;
6166         }
6167
6168         atomic_inc(&c->refcount);
6169         hpsa_cmd_partial_init(h, idx, c);
6170
6171         /*
6172          * This is a new command obtained from queue_command so
6173          * there have not been any driver initiated retry attempts.
6174          */
6175         c->retry_pending = false;
6176
6177         return c;
6178 }
6179
6180 static void cmd_tagged_free(struct ctlr_info *h, struct CommandList *c)
6181 {
6182         /*
6183          * Release our reference to the block.  We don't need to do anything
6184          * else to free it, because it is accessed by index.
6185          */
6186         (void)atomic_dec(&c->refcount);
6187 }
6188
6189 /*
6190  * For operations that cannot sleep, a command block is allocated at init,
6191  * and managed by cmd_alloc() and cmd_free() using a simple bitmap to track
6192  * which ones are free or in use.  Lock must be held when calling this.
6193  * cmd_free() is the complement.
6194  * This function never gives up and returns NULL.  If it hangs,
6195  * another thread must call cmd_free() to free some tags.
6196  */
6197
6198 static struct CommandList *cmd_alloc(struct ctlr_info *h)
6199 {
6200         struct CommandList *c;
6201         int refcount, i;
6202         int offset = 0;
6203
6204         /*
6205          * There is some *extremely* small but non-zero chance that that
6206          * multiple threads could get in here, and one thread could
6207          * be scanning through the list of bits looking for a free
6208          * one, but the free ones are always behind him, and other
6209          * threads sneak in behind him and eat them before he can
6210          * get to them, so that while there is always a free one, a
6211          * very unlucky thread might be starved anyway, never able to
6212          * beat the other threads.  In reality, this happens so
6213          * infrequently as to be indistinguishable from never.
6214          *
6215          * Note that we start allocating commands before the SCSI host structure
6216          * is initialized.  Since the search starts at bit zero, this
6217          * all works, since we have at least one command structure available;
6218          * however, it means that the structures with the low indexes have to be
6219          * reserved for driver-initiated requests, while requests from the block
6220          * layer will use the higher indexes.
6221          */
6222
6223         for (;;) {
6224                 i = find_next_zero_bit(h->cmd_pool_bits,
6225                                         HPSA_NRESERVED_CMDS,
6226                                         offset);
6227                 if (unlikely(i >= HPSA_NRESERVED_CMDS)) {
6228                         offset = 0;
6229                         continue;
6230                 }
6231                 c = h->cmd_pool + i;
6232                 refcount = atomic_inc_return(&c->refcount);
6233                 if (unlikely(refcount > 1)) {
6234                         cmd_free(h, c); /* already in use */
6235                         offset = (i + 1) % HPSA_NRESERVED_CMDS;
6236                         continue;
6237                 }
6238                 set_bit(i & (BITS_PER_LONG - 1),
6239                         h->cmd_pool_bits + (i / BITS_PER_LONG));
6240                 break; /* it's ours now. */
6241         }
6242         hpsa_cmd_partial_init(h, i, c);
6243         c->device = NULL;
6244
6245         /*
6246          * cmd_alloc is for "internal" commands and they are never
6247          * retried.
6248          */
6249         c->retry_pending = false;
6250
6251         return c;
6252 }
6253
6254 /*
6255  * This is the complementary operation to cmd_alloc().  Note, however, in some
6256  * corner cases it may also be used to free blocks allocated by
6257  * cmd_tagged_alloc() in which case the ref-count decrement does the trick and
6258  * the clear-bit is harmless.
6259  */
6260 static void cmd_free(struct ctlr_info *h, struct CommandList *c)
6261 {
6262         if (atomic_dec_and_test(&c->refcount)) {
6263                 int i;
6264
6265                 i = c - h->cmd_pool;
6266                 clear_bit(i & (BITS_PER_LONG - 1),
6267                           h->cmd_pool_bits + (i / BITS_PER_LONG));
6268         }
6269 }
6270
6271 #ifdef CONFIG_COMPAT
6272
6273 static int hpsa_ioctl32_passthru(struct scsi_device *dev, unsigned int cmd,
6274         void __user *arg)
6275 {
6276         struct ctlr_info *h = sdev_to_hba(dev);
6277         IOCTL32_Command_struct __user *arg32 = arg;
6278         IOCTL_Command_struct arg64;
6279         int err;
6280         u32 cp;
6281
6282         if (!arg)
6283                 return -EINVAL;
6284
6285         memset(&arg64, 0, sizeof(arg64));
6286         if (copy_from_user(&arg64, arg32, offsetof(IOCTL_Command_struct, buf)))
6287                 return -EFAULT;
6288         if (get_user(cp, &arg32->buf))
6289                 return -EFAULT;
6290         arg64.buf = compat_ptr(cp);
6291
6292         if (atomic_dec_if_positive(&h->passthru_cmds_avail) < 0)
6293                 return -EAGAIN;
6294         err = hpsa_passthru_ioctl(h, &arg64);
6295         atomic_inc(&h->passthru_cmds_avail);
6296         if (err)
6297                 return err;
6298         if (copy_to_user(&arg32->error_info, &arg64.error_info,
6299                          sizeof(arg32->error_info)))
6300                 return -EFAULT;
6301         return 0;
6302 }
6303
6304 static int hpsa_ioctl32_big_passthru(struct scsi_device *dev,
6305         unsigned int cmd, void __user *arg)
6306 {
6307         struct ctlr_info *h = sdev_to_hba(dev);
6308         BIG_IOCTL32_Command_struct __user *arg32 = arg;
6309         BIG_IOCTL_Command_struct arg64;
6310         int err;
6311         u32 cp;
6312
6313         if (!arg)
6314                 return -EINVAL;
6315         memset(&arg64, 0, sizeof(arg64));
6316         if (copy_from_user(&arg64, arg32,
6317                            offsetof(BIG_IOCTL32_Command_struct, buf)))
6318                 return -EFAULT;
6319         if (get_user(cp, &arg32->buf))
6320                 return -EFAULT;
6321         arg64.buf = compat_ptr(cp);
6322
6323         if (atomic_dec_if_positive(&h->passthru_cmds_avail) < 0)
6324                 return -EAGAIN;
6325         err = hpsa_big_passthru_ioctl(h, &arg64);
6326         atomic_inc(&h->passthru_cmds_avail);
6327         if (err)
6328                 return err;
6329         if (copy_to_user(&arg32->error_info, &arg64.error_info,
6330                          sizeof(arg32->error_info)))
6331                 return -EFAULT;
6332         return 0;
6333 }
6334
6335 static int hpsa_compat_ioctl(struct scsi_device *dev, unsigned int cmd,
6336                              void __user *arg)
6337 {
6338         switch (cmd) {
6339         case CCISS_GETPCIINFO:
6340         case CCISS_GETINTINFO:
6341         case CCISS_SETINTINFO:
6342         case CCISS_GETNODENAME:
6343         case CCISS_SETNODENAME:
6344         case CCISS_GETHEARTBEAT:
6345         case CCISS_GETBUSTYPES:
6346         case CCISS_GETFIRMVER:
6347         case CCISS_GETDRIVVER:
6348         case CCISS_REVALIDVOLS:
6349         case CCISS_DEREGDISK:
6350         case CCISS_REGNEWDISK:
6351         case CCISS_REGNEWD:
6352         case CCISS_RESCANDISK:
6353         case CCISS_GETLUNINFO:
6354                 return hpsa_ioctl(dev, cmd, arg);
6355
6356         case CCISS_PASSTHRU32:
6357                 return hpsa_ioctl32_passthru(dev, cmd, arg);
6358         case CCISS_BIG_PASSTHRU32:
6359                 return hpsa_ioctl32_big_passthru(dev, cmd, arg);
6360
6361         default:
6362                 return -ENOIOCTLCMD;
6363         }
6364 }
6365 #endif
6366
6367 static int hpsa_getpciinfo_ioctl(struct ctlr_info *h, void __user *argp)
6368 {
6369         struct hpsa_pci_info pciinfo;
6370
6371         if (!argp)
6372                 return -EINVAL;
6373         pciinfo.domain = pci_domain_nr(h->pdev->bus);
6374         pciinfo.bus = h->pdev->bus->number;
6375         pciinfo.dev_fn = h->pdev->devfn;
6376         pciinfo.board_id = h->board_id;
6377         if (copy_to_user(argp, &pciinfo, sizeof(pciinfo)))
6378                 return -EFAULT;
6379         return 0;
6380 }
6381
6382 static int hpsa_getdrivver_ioctl(struct ctlr_info *h, void __user *argp)
6383 {
6384         DriverVer_type DriverVer;
6385         unsigned char vmaj, vmin, vsubmin;
6386         int rc;
6387
6388         rc = sscanf(HPSA_DRIVER_VERSION, "%hhu.%hhu.%hhu",
6389                 &vmaj, &vmin, &vsubmin);
6390         if (rc != 3) {
6391                 dev_info(&h->pdev->dev, "driver version string '%s' "
6392                         "unrecognized.", HPSA_DRIVER_VERSION);
6393                 vmaj = 0;
6394                 vmin = 0;
6395                 vsubmin = 0;
6396         }
6397         DriverVer = (vmaj << 16) | (vmin << 8) | vsubmin;
6398         if (!argp)
6399                 return -EINVAL;
6400         if (copy_to_user(argp, &DriverVer, sizeof(DriverVer_type)))
6401                 return -EFAULT;
6402         return 0;
6403 }
6404
6405 static int hpsa_passthru_ioctl(struct ctlr_info *h,
6406                                IOCTL_Command_struct *iocommand)
6407 {
6408         struct CommandList *c;
6409         char *buff = NULL;
6410         u64 temp64;
6411         int rc = 0;
6412
6413         if (!capable(CAP_SYS_RAWIO))
6414                 return -EPERM;
6415         if ((iocommand->buf_size < 1) &&
6416             (iocommand->Request.Type.Direction != XFER_NONE)) {
6417                 return -EINVAL;
6418         }
6419         if (iocommand->buf_size > 0) {
6420                 buff = kmalloc(iocommand->buf_size, GFP_KERNEL);
6421                 if (buff == NULL)
6422                         return -ENOMEM;
6423                 if (iocommand->Request.Type.Direction & XFER_WRITE) {
6424                         /* Copy the data into the buffer we created */
6425                         if (copy_from_user(buff, iocommand->buf,
6426                                 iocommand->buf_size)) {
6427                                 rc = -EFAULT;
6428                                 goto out_kfree;
6429                         }
6430                 } else {
6431                         memset(buff, 0, iocommand->buf_size);
6432                 }
6433         }
6434         c = cmd_alloc(h);
6435
6436         /* Fill in the command type */
6437         c->cmd_type = CMD_IOCTL_PEND;
6438         c->scsi_cmd = SCSI_CMD_BUSY;
6439         /* Fill in Command Header */
6440         c->Header.ReplyQueue = 0; /* unused in simple mode */
6441         if (iocommand->buf_size > 0) {  /* buffer to fill */
6442                 c->Header.SGList = 1;
6443                 c->Header.SGTotal = cpu_to_le16(1);
6444         } else  { /* no buffers to fill */
6445                 c->Header.SGList = 0;
6446                 c->Header.SGTotal = cpu_to_le16(0);
6447         }
6448         memcpy(&c->Header.LUN, &iocommand->LUN_info, sizeof(c->Header.LUN));
6449
6450         /* Fill in Request block */
6451         memcpy(&c->Request, &iocommand->Request,
6452                 sizeof(c->Request));
6453
6454         /* Fill in the scatter gather information */
6455         if (iocommand->buf_size > 0) {
6456                 temp64 = dma_map_single(&h->pdev->dev, buff,
6457                         iocommand->buf_size, DMA_BIDIRECTIONAL);
6458                 if (dma_mapping_error(&h->pdev->dev, (dma_addr_t) temp64)) {
6459                         c->SG[0].Addr = cpu_to_le64(0);
6460                         c->SG[0].Len = cpu_to_le32(0);
6461                         rc = -ENOMEM;
6462                         goto out;
6463                 }
6464                 c->SG[0].Addr = cpu_to_le64(temp64);
6465                 c->SG[0].Len = cpu_to_le32(iocommand->buf_size);
6466                 c->SG[0].Ext = cpu_to_le32(HPSA_SG_LAST); /* not chaining */
6467         }
6468         rc = hpsa_scsi_do_simple_cmd(h, c, DEFAULT_REPLY_QUEUE,
6469                                         NO_TIMEOUT);
6470         if (iocommand->buf_size > 0)
6471                 hpsa_pci_unmap(h->pdev, c, 1, DMA_BIDIRECTIONAL);
6472         check_ioctl_unit_attention(h, c);
6473         if (rc) {
6474                 rc = -EIO;
6475                 goto out;
6476         }
6477
6478         /* Copy the error information out */
6479         memcpy(&iocommand->error_info, c->err_info,
6480                 sizeof(iocommand->error_info));
6481         if ((iocommand->Request.Type.Direction & XFER_READ) &&
6482                 iocommand->buf_size > 0) {
6483                 /* Copy the data out of the buffer we created */
6484                 if (copy_to_user(iocommand->buf, buff, iocommand->buf_size)) {
6485                         rc = -EFAULT;
6486                         goto out;
6487                 }
6488         }
6489 out:
6490         cmd_free(h, c);
6491 out_kfree:
6492         kfree(buff);
6493         return rc;
6494 }
6495
6496 static int hpsa_big_passthru_ioctl(struct ctlr_info *h,
6497                                    BIG_IOCTL_Command_struct *ioc)
6498 {
6499         struct CommandList *c;
6500         unsigned char **buff = NULL;
6501         int *buff_size = NULL;
6502         u64 temp64;
6503         BYTE sg_used = 0;
6504         int status = 0;
6505         u32 left;
6506         u32 sz;
6507         BYTE __user *data_ptr;
6508
6509         if (!capable(CAP_SYS_RAWIO))
6510                 return -EPERM;
6511
6512         if ((ioc->buf_size < 1) &&
6513             (ioc->Request.Type.Direction != XFER_NONE))
6514                 return -EINVAL;
6515         /* Check kmalloc limits  using all SGs */
6516         if (ioc->malloc_size > MAX_KMALLOC_SIZE)
6517                 return -EINVAL;
6518         if (ioc->buf_size > ioc->malloc_size * SG_ENTRIES_IN_CMD)
6519                 return -EINVAL;
6520         buff = kcalloc(SG_ENTRIES_IN_CMD, sizeof(char *), GFP_KERNEL);
6521         if (!buff) {
6522                 status = -ENOMEM;
6523                 goto cleanup1;
6524         }
6525         buff_size = kmalloc_array(SG_ENTRIES_IN_CMD, sizeof(int), GFP_KERNEL);
6526         if (!buff_size) {
6527                 status = -ENOMEM;
6528                 goto cleanup1;
6529         }
6530         left = ioc->buf_size;
6531         data_ptr = ioc->buf;
6532         while (left) {
6533                 sz = (left > ioc->malloc_size) ? ioc->malloc_size : left;
6534                 buff_size[sg_used] = sz;
6535                 buff[sg_used] = kmalloc(sz, GFP_KERNEL);
6536                 if (buff[sg_used] == NULL) {
6537                         status = -ENOMEM;
6538                         goto cleanup1;
6539                 }
6540                 if (ioc->Request.Type.Direction & XFER_WRITE) {
6541                         if (copy_from_user(buff[sg_used], data_ptr, sz)) {
6542                                 status = -EFAULT;
6543                                 goto cleanup1;
6544                         }
6545                 } else
6546                         memset(buff[sg_used], 0, sz);
6547                 left -= sz;
6548                 data_ptr += sz;
6549                 sg_used++;
6550         }
6551         c = cmd_alloc(h);
6552
6553         c->cmd_type = CMD_IOCTL_PEND;
6554         c->scsi_cmd = SCSI_CMD_BUSY;
6555         c->Header.ReplyQueue = 0;
6556         c->Header.SGList = (u8) sg_used;
6557         c->Header.SGTotal = cpu_to_le16(sg_used);
6558         memcpy(&c->Header.LUN, &ioc->LUN_info, sizeof(c->Header.LUN));
6559         memcpy(&c->Request, &ioc->Request, sizeof(c->Request));
6560         if (ioc->buf_size > 0) {
6561                 int i;
6562                 for (i = 0; i < sg_used; i++) {
6563                         temp64 = dma_map_single(&h->pdev->dev, buff[i],
6564                                     buff_size[i], DMA_BIDIRECTIONAL);
6565                         if (dma_mapping_error(&h->pdev->dev,
6566                                                         (dma_addr_t) temp64)) {
6567                                 c->SG[i].Addr = cpu_to_le64(0);
6568                                 c->SG[i].Len = cpu_to_le32(0);
6569                                 hpsa_pci_unmap(h->pdev, c, i,
6570                                         DMA_BIDIRECTIONAL);
6571                                 status = -ENOMEM;
6572                                 goto cleanup0;
6573                         }
6574                         c->SG[i].Addr = cpu_to_le64(temp64);
6575                         c->SG[i].Len = cpu_to_le32(buff_size[i]);
6576                         c->SG[i].Ext = cpu_to_le32(0);
6577                 }
6578                 c->SG[--i].Ext = cpu_to_le32(HPSA_SG_LAST);
6579         }
6580         status = hpsa_scsi_do_simple_cmd(h, c, DEFAULT_REPLY_QUEUE,
6581                                                 NO_TIMEOUT);
6582         if (sg_used)
6583                 hpsa_pci_unmap(h->pdev, c, sg_used, DMA_BIDIRECTIONAL);
6584         check_ioctl_unit_attention(h, c);
6585         if (status) {
6586                 status = -EIO;
6587                 goto cleanup0;
6588         }
6589
6590         /* Copy the error information out */
6591         memcpy(&ioc->error_info, c->err_info, sizeof(ioc->error_info));
6592         if ((ioc->Request.Type.Direction & XFER_READ) && ioc->buf_size > 0) {
6593                 int i;
6594
6595                 /* Copy the data out of the buffer we created */
6596                 BYTE __user *ptr = ioc->buf;
6597                 for (i = 0; i < sg_used; i++) {
6598                         if (copy_to_user(ptr, buff[i], buff_size[i])) {
6599                                 status = -EFAULT;
6600                                 goto cleanup0;
6601                         }
6602                         ptr += buff_size[i];
6603                 }
6604         }
6605         status = 0;
6606 cleanup0:
6607         cmd_free(h, c);
6608 cleanup1:
6609         if (buff) {
6610                 int i;
6611
6612                 for (i = 0; i < sg_used; i++)
6613                         kfree(buff[i]);
6614                 kfree(buff);
6615         }
6616         kfree(buff_size);
6617         return status;
6618 }
6619
6620 static void check_ioctl_unit_attention(struct ctlr_info *h,
6621         struct CommandList *c)
6622 {
6623         if (c->err_info->CommandStatus == CMD_TARGET_STATUS &&
6624                         c->err_info->ScsiStatus != SAM_STAT_CHECK_CONDITION)
6625                 (void) check_for_unit_attention(h, c);
6626 }
6627
6628 /*
6629  * ioctl
6630  */
6631 static int hpsa_ioctl(struct scsi_device *dev, unsigned int cmd,
6632                       void __user *argp)
6633 {
6634         struct ctlr_info *h = sdev_to_hba(dev);
6635         int rc;
6636
6637         switch (cmd) {
6638         case CCISS_DEREGDISK:
6639         case CCISS_REGNEWDISK:
6640         case CCISS_REGNEWD:
6641                 hpsa_scan_start(h->scsi_host);
6642                 return 0;
6643         case CCISS_GETPCIINFO:
6644                 return hpsa_getpciinfo_ioctl(h, argp);
6645         case CCISS_GETDRIVVER:
6646                 return hpsa_getdrivver_ioctl(h, argp);
6647         case CCISS_PASSTHRU: {
6648                 IOCTL_Command_struct iocommand;
6649
6650                 if (!argp)
6651                         return -EINVAL;
6652                 if (copy_from_user(&iocommand, argp, sizeof(iocommand)))
6653                         return -EFAULT;
6654                 if (atomic_dec_if_positive(&h->passthru_cmds_avail) < 0)
6655                         return -EAGAIN;
6656                 rc = hpsa_passthru_ioctl(h, &iocommand);
6657                 atomic_inc(&h->passthru_cmds_avail);
6658                 if (!rc && copy_to_user(argp, &iocommand, sizeof(iocommand)))
6659                         rc = -EFAULT;
6660                 return rc;
6661         }
6662         case CCISS_BIG_PASSTHRU: {
6663                 BIG_IOCTL_Command_struct ioc;
6664                 if (!argp)
6665                         return -EINVAL;
6666                 if (copy_from_user(&ioc, argp, sizeof(ioc)))
6667                         return -EFAULT;
6668                 if (atomic_dec_if_positive(&h->passthru_cmds_avail) < 0)
6669                         return -EAGAIN;
6670                 rc = hpsa_big_passthru_ioctl(h, &ioc);
6671                 atomic_inc(&h->passthru_cmds_avail);
6672                 if (!rc && copy_to_user(argp, &ioc, sizeof(ioc)))
6673                         rc = -EFAULT;
6674                 return rc;
6675         }
6676         default:
6677                 return -ENOTTY;
6678         }
6679 }
6680
6681 static void hpsa_send_host_reset(struct ctlr_info *h, u8 reset_type)
6682 {
6683         struct CommandList *c;
6684
6685         c = cmd_alloc(h);
6686
6687         /* fill_cmd can't fail here, no data buffer to map */
6688         (void) fill_cmd(c, HPSA_DEVICE_RESET_MSG, h, NULL, 0, 0,
6689                 RAID_CTLR_LUNID, TYPE_MSG);
6690         c->Request.CDB[1] = reset_type; /* fill_cmd defaults to target reset */
6691         c->waiting = NULL;
6692         enqueue_cmd_and_start_io(h, c);
6693         /* Don't wait for completion, the reset won't complete.  Don't free
6694          * the command either.  This is the last command we will send before
6695          * re-initializing everything, so it doesn't matter and won't leak.
6696          */
6697         return;
6698 }
6699
6700 static int fill_cmd(struct CommandList *c, u8 cmd, struct ctlr_info *h,
6701         void *buff, size_t size, u16 page_code, unsigned char *scsi3addr,
6702         int cmd_type)
6703 {
6704         enum dma_data_direction dir = DMA_NONE;
6705
6706         c->cmd_type = CMD_IOCTL_PEND;
6707         c->scsi_cmd = SCSI_CMD_BUSY;
6708         c->Header.ReplyQueue = 0;
6709         if (buff != NULL && size > 0) {
6710                 c->Header.SGList = 1;
6711                 c->Header.SGTotal = cpu_to_le16(1);
6712         } else {
6713                 c->Header.SGList = 0;
6714                 c->Header.SGTotal = cpu_to_le16(0);
6715         }
6716         memcpy(c->Header.LUN.LunAddrBytes, scsi3addr, 8);
6717
6718         if (cmd_type == TYPE_CMD) {
6719                 switch (cmd) {
6720                 case HPSA_INQUIRY:
6721                         /* are we trying to read a vital product page */
6722                         if (page_code & VPD_PAGE) {
6723                                 c->Request.CDB[1] = 0x01;
6724                                 c->Request.CDB[2] = (page_code & 0xff);
6725                         }
6726                         c->Request.CDBLen = 6;
6727                         c->Request.type_attr_dir =
6728                                 TYPE_ATTR_DIR(cmd_type, ATTR_SIMPLE, XFER_READ);
6729                         c->Request.Timeout = 0;
6730                         c->Request.CDB[0] = HPSA_INQUIRY;
6731                         c->Request.CDB[4] = size & 0xFF;
6732                         break;
6733                 case RECEIVE_DIAGNOSTIC:
6734                         c->Request.CDBLen = 6;
6735                         c->Request.type_attr_dir =
6736                                 TYPE_ATTR_DIR(cmd_type, ATTR_SIMPLE, XFER_READ);
6737                         c->Request.Timeout = 0;
6738                         c->Request.CDB[0] = cmd;
6739                         c->Request.CDB[1] = 1;
6740                         c->Request.CDB[2] = 1;
6741                         c->Request.CDB[3] = (size >> 8) & 0xFF;
6742                         c->Request.CDB[4] = size & 0xFF;
6743                         break;
6744                 case HPSA_REPORT_LOG:
6745                 case HPSA_REPORT_PHYS:
6746                         /* Talking to controller so It's a physical command
6747                            mode = 00 target = 0.  Nothing to write.
6748                          */
6749                         c->Request.CDBLen = 12;
6750                         c->Request.type_attr_dir =
6751                                 TYPE_ATTR_DIR(cmd_type, ATTR_SIMPLE, XFER_READ);
6752                         c->Request.Timeout = 0;
6753                         c->Request.CDB[0] = cmd;
6754                         c->Request.CDB[6] = (size >> 24) & 0xFF; /* MSB */
6755                         c->Request.CDB[7] = (size >> 16) & 0xFF;
6756                         c->Request.CDB[8] = (size >> 8) & 0xFF;
6757                         c->Request.CDB[9] = size & 0xFF;
6758                         break;
6759                 case BMIC_SENSE_DIAG_OPTIONS:
6760                         c->Request.CDBLen = 16;
6761                         c->Request.type_attr_dir =
6762                                 TYPE_ATTR_DIR(cmd_type, ATTR_SIMPLE, XFER_READ);
6763                         c->Request.Timeout = 0;
6764                         /* Spec says this should be BMIC_WRITE */
6765                         c->Request.CDB[0] = BMIC_READ;
6766                         c->Request.CDB[6] = BMIC_SENSE_DIAG_OPTIONS;
6767                         break;
6768                 case BMIC_SET_DIAG_OPTIONS:
6769                         c->Request.CDBLen = 16;
6770                         c->Request.type_attr_dir =
6771                                         TYPE_ATTR_DIR(cmd_type,
6772                                                 ATTR_SIMPLE, XFER_WRITE);
6773                         c->Request.Timeout = 0;
6774                         c->Request.CDB[0] = BMIC_WRITE;
6775                         c->Request.CDB[6] = BMIC_SET_DIAG_OPTIONS;
6776                         break;
6777                 case HPSA_CACHE_FLUSH:
6778                         c->Request.CDBLen = 12;
6779                         c->Request.type_attr_dir =
6780                                         TYPE_ATTR_DIR(cmd_type,
6781                                                 ATTR_SIMPLE, XFER_WRITE);
6782                         c->Request.Timeout = 0;
6783                         c->Request.CDB[0] = BMIC_WRITE;
6784                         c->Request.CDB[6] = BMIC_CACHE_FLUSH;
6785                         c->Request.CDB[7] = (size >> 8) & 0xFF;
6786                         c->Request.CDB[8] = size & 0xFF;
6787                         break;
6788                 case TEST_UNIT_READY:
6789                         c->Request.CDBLen = 6;
6790                         c->Request.type_attr_dir =
6791                                 TYPE_ATTR_DIR(cmd_type, ATTR_SIMPLE, XFER_NONE);
6792                         c->Request.Timeout = 0;
6793                         break;
6794                 case HPSA_GET_RAID_MAP:
6795                         c->Request.CDBLen = 12;
6796                         c->Request.type_attr_dir =
6797                                 TYPE_ATTR_DIR(cmd_type, ATTR_SIMPLE, XFER_READ);
6798                         c->Request.Timeout = 0;
6799                         c->Request.CDB[0] = HPSA_CISS_READ;
6800                         c->Request.CDB[1] = cmd;
6801                         c->Request.CDB[6] = (size >> 24) & 0xFF; /* MSB */
6802                         c->Request.CDB[7] = (size >> 16) & 0xFF;
6803                         c->Request.CDB[8] = (size >> 8) & 0xFF;
6804                         c->Request.CDB[9] = size & 0xFF;
6805                         break;
6806                 case BMIC_SENSE_CONTROLLER_PARAMETERS:
6807                         c->Request.CDBLen = 10;
6808                         c->Request.type_attr_dir =
6809                                 TYPE_ATTR_DIR(cmd_type, ATTR_SIMPLE, XFER_READ);
6810                         c->Request.Timeout = 0;
6811                         c->Request.CDB[0] = BMIC_READ;
6812                         c->Request.CDB[6] = BMIC_SENSE_CONTROLLER_PARAMETERS;
6813                         c->Request.CDB[7] = (size >> 16) & 0xFF;
6814                         c->Request.CDB[8] = (size >> 8) & 0xFF;
6815                         break;
6816                 case BMIC_IDENTIFY_PHYSICAL_DEVICE:
6817                         c->Request.CDBLen = 10;
6818                         c->Request.type_attr_dir =
6819                                 TYPE_ATTR_DIR(cmd_type, ATTR_SIMPLE, XFER_READ);
6820                         c->Request.Timeout = 0;
6821                         c->Request.CDB[0] = BMIC_READ;
6822                         c->Request.CDB[6] = BMIC_IDENTIFY_PHYSICAL_DEVICE;
6823                         c->Request.CDB[7] = (size >> 16) & 0xFF;
6824                         c->Request.CDB[8] = (size >> 8) & 0XFF;
6825                         break;
6826                 case BMIC_SENSE_SUBSYSTEM_INFORMATION:
6827                         c->Request.CDBLen = 10;
6828                         c->Request.type_attr_dir =
6829                                 TYPE_ATTR_DIR(cmd_type, ATTR_SIMPLE, XFER_READ);
6830                         c->Request.Timeout = 0;
6831                         c->Request.CDB[0] = BMIC_READ;
6832                         c->Request.CDB[6] = BMIC_SENSE_SUBSYSTEM_INFORMATION;
6833                         c->Request.CDB[7] = (size >> 16) & 0xFF;
6834                         c->Request.CDB[8] = (size >> 8) & 0XFF;
6835                         break;
6836                 case BMIC_SENSE_STORAGE_BOX_PARAMS:
6837                         c->Request.CDBLen = 10;
6838                         c->Request.type_attr_dir =
6839                                 TYPE_ATTR_DIR(cmd_type, ATTR_SIMPLE, XFER_READ);
6840                         c->Request.Timeout = 0;
6841                         c->Request.CDB[0] = BMIC_READ;
6842                         c->Request.CDB[6] = BMIC_SENSE_STORAGE_BOX_PARAMS;
6843                         c->Request.CDB[7] = (size >> 16) & 0xFF;
6844                         c->Request.CDB[8] = (size >> 8) & 0XFF;
6845                         break;
6846                 case BMIC_IDENTIFY_CONTROLLER:
6847                         c->Request.CDBLen = 10;
6848                         c->Request.type_attr_dir =
6849                                 TYPE_ATTR_DIR(cmd_type, ATTR_SIMPLE, XFER_READ);
6850                         c->Request.Timeout = 0;
6851                         c->Request.CDB[0] = BMIC_READ;
6852                         c->Request.CDB[1] = 0;
6853                         c->Request.CDB[2] = 0;
6854                         c->Request.CDB[3] = 0;
6855                         c->Request.CDB[4] = 0;
6856                         c->Request.CDB[5] = 0;
6857                         c->Request.CDB[6] = BMIC_IDENTIFY_CONTROLLER;
6858                         c->Request.CDB[7] = (size >> 16) & 0xFF;
6859                         c->Request.CDB[8] = (size >> 8) & 0XFF;
6860                         c->Request.CDB[9] = 0;
6861                         break;
6862                 default:
6863                         dev_warn(&h->pdev->dev, "unknown command 0x%c\n", cmd);
6864                         BUG();
6865                 }
6866         } else if (cmd_type == TYPE_MSG) {
6867                 switch (cmd) {
6868
6869                 case  HPSA_PHYS_TARGET_RESET:
6870                         c->Request.CDBLen = 16;
6871                         c->Request.type_attr_dir =
6872                                 TYPE_ATTR_DIR(cmd_type, ATTR_SIMPLE, XFER_NONE);
6873                         c->Request.Timeout = 0; /* Don't time out */
6874                         memset(&c->Request.CDB[0], 0, sizeof(c->Request.CDB));
6875                         c->Request.CDB[0] = HPSA_RESET;
6876                         c->Request.CDB[1] = HPSA_TARGET_RESET_TYPE;
6877                         /* Physical target reset needs no control bytes 4-7*/
6878                         c->Request.CDB[4] = 0x00;
6879                         c->Request.CDB[5] = 0x00;
6880                         c->Request.CDB[6] = 0x00;
6881                         c->Request.CDB[7] = 0x00;
6882                         break;
6883                 case  HPSA_DEVICE_RESET_MSG:
6884                         c->Request.CDBLen = 16;
6885                         c->Request.type_attr_dir =
6886                                 TYPE_ATTR_DIR(cmd_type, ATTR_SIMPLE, XFER_NONE);
6887                         c->Request.Timeout = 0; /* Don't time out */
6888                         memset(&c->Request.CDB[0], 0, sizeof(c->Request.CDB));
6889                         c->Request.CDB[0] =  cmd;
6890                         c->Request.CDB[1] = HPSA_RESET_TYPE_LUN;
6891                         /* If bytes 4-7 are zero, it means reset the */
6892                         /* LunID device */
6893                         c->Request.CDB[4] = 0x00;
6894                         c->Request.CDB[5] = 0x00;
6895                         c->Request.CDB[6] = 0x00;
6896                         c->Request.CDB[7] = 0x00;
6897                         break;
6898                 default:
6899                         dev_warn(&h->pdev->dev, "unknown message type %d\n",
6900                                 cmd);
6901                         BUG();
6902                 }
6903         } else {
6904                 dev_warn(&h->pdev->dev, "unknown command type %d\n", cmd_type);
6905                 BUG();
6906         }
6907
6908         switch (GET_DIR(c->Request.type_attr_dir)) {
6909         case XFER_READ:
6910                 dir = DMA_FROM_DEVICE;
6911                 break;
6912         case XFER_WRITE:
6913                 dir = DMA_TO_DEVICE;
6914                 break;
6915         case XFER_NONE:
6916                 dir = DMA_NONE;
6917                 break;
6918         default:
6919                 dir = DMA_BIDIRECTIONAL;
6920         }
6921         if (hpsa_map_one(h->pdev, c, buff, size, dir))
6922                 return -1;
6923         return 0;
6924 }
6925
6926 /*
6927  * Map (physical) PCI mem into (virtual) kernel space
6928  */
6929 static void __iomem *remap_pci_mem(ulong base, ulong size)
6930 {
6931         ulong page_base = ((ulong) base) & PAGE_MASK;
6932         ulong page_offs = ((ulong) base) - page_base;
6933         void __iomem *page_remapped = ioremap(page_base,
6934                 page_offs + size);
6935
6936         return page_remapped ? (page_remapped + page_offs) : NULL;
6937 }
6938
6939 static inline unsigned long get_next_completion(struct ctlr_info *h, u8 q)
6940 {
6941         return h->access.command_completed(h, q);
6942 }
6943
6944 static inline bool interrupt_pending(struct ctlr_info *h)
6945 {
6946         return h->access.intr_pending(h);
6947 }
6948
6949 static inline long interrupt_not_for_us(struct ctlr_info *h)
6950 {
6951         return (h->access.intr_pending(h) == 0) ||
6952                 (h->interrupts_enabled == 0);
6953 }
6954
6955 static inline int bad_tag(struct ctlr_info *h, u32 tag_index,
6956         u32 raw_tag)
6957 {
6958         if (unlikely(tag_index >= h->nr_cmds)) {
6959                 dev_warn(&h->pdev->dev, "bad tag 0x%08x ignored.\n", raw_tag);
6960                 return 1;
6961         }
6962         return 0;
6963 }
6964
6965 static inline void finish_cmd(struct CommandList *c)
6966 {
6967         dial_up_lockup_detection_on_fw_flash_complete(c->h, c);
6968         if (likely(c->cmd_type == CMD_IOACCEL1 || c->cmd_type == CMD_SCSI
6969                         || c->cmd_type == CMD_IOACCEL2))
6970                 complete_scsi_command(c);
6971         else if (c->cmd_type == CMD_IOCTL_PEND || c->cmd_type == IOACCEL2_TMF)
6972                 complete(c->waiting);
6973 }
6974
6975 /* process completion of an indexed ("direct lookup") command */
6976 static inline void process_indexed_cmd(struct ctlr_info *h,
6977         u32 raw_tag)
6978 {
6979         u32 tag_index;
6980         struct CommandList *c;
6981
6982         tag_index = raw_tag >> DIRECT_LOOKUP_SHIFT;
6983         if (!bad_tag(h, tag_index, raw_tag)) {
6984                 c = h->cmd_pool + tag_index;
6985                 finish_cmd(c);
6986         }
6987 }
6988
6989 /* Some controllers, like p400, will give us one interrupt
6990  * after a soft reset, even if we turned interrupts off.
6991  * Only need to check for this in the hpsa_xxx_discard_completions
6992  * functions.
6993  */
6994 static int ignore_bogus_interrupt(struct ctlr_info *h)
6995 {
6996         if (likely(!reset_devices))
6997                 return 0;
6998
6999         if (likely(h->interrupts_enabled))
7000                 return 0;
7001
7002         dev_info(&h->pdev->dev, "Received interrupt while interrupts disabled "
7003                 "(known firmware bug.)  Ignoring.\n");
7004
7005         return 1;
7006 }
7007
7008 /*
7009  * Convert &h->q[x] (passed to interrupt handlers) back to h.
7010  * Relies on (h-q[x] == x) being true for x such that
7011  * 0 <= x < MAX_REPLY_QUEUES.
7012  */
7013 static struct ctlr_info *queue_to_hba(u8 *queue)
7014 {
7015         return container_of((queue - *queue), struct ctlr_info, q[0]);
7016 }
7017
7018 static irqreturn_t hpsa_intx_discard_completions(int irq, void *queue)
7019 {
7020         struct ctlr_info *h = queue_to_hba(queue);
7021         u8 q = *(u8 *) queue;
7022         u32 raw_tag;
7023
7024         if (ignore_bogus_interrupt(h))
7025                 return IRQ_NONE;
7026
7027         if (interrupt_not_for_us(h))
7028                 return IRQ_NONE;
7029         h->last_intr_timestamp = get_jiffies_64();
7030         while (interrupt_pending(h)) {
7031                 raw_tag = get_next_completion(h, q);
7032                 while (raw_tag != FIFO_EMPTY)
7033                         raw_tag = next_command(h, q);
7034         }
7035         return IRQ_HANDLED;
7036 }
7037
7038 static irqreturn_t hpsa_msix_discard_completions(int irq, void *queue)
7039 {
7040         struct ctlr_info *h = queue_to_hba(queue);
7041         u32 raw_tag;
7042         u8 q = *(u8 *) queue;
7043
7044         if (ignore_bogus_interrupt(h))
7045                 return IRQ_NONE;
7046
7047         h->last_intr_timestamp = get_jiffies_64();
7048         raw_tag = get_next_completion(h, q);
7049         while (raw_tag != FIFO_EMPTY)
7050                 raw_tag = next_command(h, q);
7051         return IRQ_HANDLED;
7052 }
7053
7054 static irqreturn_t do_hpsa_intr_intx(int irq, void *queue)
7055 {
7056         struct ctlr_info *h = queue_to_hba((u8 *) queue);
7057         u32 raw_tag;
7058         u8 q = *(u8 *) queue;
7059
7060         if (interrupt_not_for_us(h))
7061                 return IRQ_NONE;
7062         h->last_intr_timestamp = get_jiffies_64();
7063         while (interrupt_pending(h)) {
7064                 raw_tag = get_next_completion(h, q);
7065                 while (raw_tag != FIFO_EMPTY) {
7066                         process_indexed_cmd(h, raw_tag);
7067                         raw_tag = next_command(h, q);
7068                 }
7069         }
7070         return IRQ_HANDLED;
7071 }
7072
7073 static irqreturn_t do_hpsa_intr_msi(int irq, void *queue)
7074 {
7075         struct ctlr_info *h = queue_to_hba(queue);
7076         u32 raw_tag;
7077         u8 q = *(u8 *) queue;
7078
7079         h->last_intr_timestamp = get_jiffies_64();
7080         raw_tag = get_next_completion(h, q);
7081         while (raw_tag != FIFO_EMPTY) {
7082                 process_indexed_cmd(h, raw_tag);
7083                 raw_tag = next_command(h, q);
7084         }
7085         return IRQ_HANDLED;
7086 }
7087
7088 /* Send a message CDB to the firmware. Careful, this only works
7089  * in simple mode, not performant mode due to the tag lookup.
7090  * We only ever use this immediately after a controller reset.
7091  */
7092 static int hpsa_message(struct pci_dev *pdev, unsigned char opcode,
7093                         unsigned char type)
7094 {
7095         struct Command {
7096                 struct CommandListHeader CommandHeader;
7097                 struct RequestBlock Request;
7098                 struct ErrDescriptor ErrorDescriptor;
7099         };
7100         struct Command *cmd;
7101         static const size_t cmd_sz = sizeof(*cmd) +
7102                                         sizeof(cmd->ErrorDescriptor);
7103         dma_addr_t paddr64;
7104         __le32 paddr32;
7105         u32 tag;
7106         void __iomem *vaddr;
7107         int i, err;
7108
7109         vaddr = pci_ioremap_bar(pdev, 0);
7110         if (vaddr == NULL)
7111                 return -ENOMEM;
7112
7113         /* The Inbound Post Queue only accepts 32-bit physical addresses for the
7114          * CCISS commands, so they must be allocated from the lower 4GiB of
7115          * memory.
7116          */
7117         err = dma_set_coherent_mask(&pdev->dev, DMA_BIT_MASK(32));
7118         if (err) {
7119                 iounmap(vaddr);
7120                 return err;
7121         }
7122
7123         cmd = dma_alloc_coherent(&pdev->dev, cmd_sz, &paddr64, GFP_KERNEL);
7124         if (cmd == NULL) {
7125                 iounmap(vaddr);
7126                 return -ENOMEM;
7127         }
7128
7129         /* This must fit, because of the 32-bit consistent DMA mask.  Also,
7130          * although there's no guarantee, we assume that the address is at
7131          * least 4-byte aligned (most likely, it's page-aligned).
7132          */
7133         paddr32 = cpu_to_le32(paddr64);
7134
7135         cmd->CommandHeader.ReplyQueue = 0;
7136         cmd->CommandHeader.SGList = 0;
7137         cmd->CommandHeader.SGTotal = cpu_to_le16(0);
7138         cmd->CommandHeader.tag = cpu_to_le64(paddr64);
7139         memset(&cmd->CommandHeader.LUN.LunAddrBytes, 0, 8);
7140
7141         cmd->Request.CDBLen = 16;
7142         cmd->Request.type_attr_dir =
7143                         TYPE_ATTR_DIR(TYPE_MSG, ATTR_HEADOFQUEUE, XFER_NONE);
7144         cmd->Request.Timeout = 0; /* Don't time out */
7145         cmd->Request.CDB[0] = opcode;
7146         cmd->Request.CDB[1] = type;
7147         memset(&cmd->Request.CDB[2], 0, 14); /* rest of the CDB is reserved */
7148         cmd->ErrorDescriptor.Addr =
7149                         cpu_to_le64((le32_to_cpu(paddr32) + sizeof(*cmd)));
7150         cmd->ErrorDescriptor.Len = cpu_to_le32(sizeof(struct ErrorInfo));
7151
7152         writel(le32_to_cpu(paddr32), vaddr + SA5_REQUEST_PORT_OFFSET);
7153
7154         for (i = 0; i < HPSA_MSG_SEND_RETRY_LIMIT; i++) {
7155                 tag = readl(vaddr + SA5_REPLY_PORT_OFFSET);
7156                 if ((tag & ~HPSA_SIMPLE_ERROR_BITS) == paddr64)
7157                         break;
7158                 msleep(HPSA_MSG_SEND_RETRY_INTERVAL_MSECS);
7159         }
7160
7161         iounmap(vaddr);
7162
7163         /* we leak the DMA buffer here ... no choice since the controller could
7164          *  still complete the command.
7165          */
7166         if (i == HPSA_MSG_SEND_RETRY_LIMIT) {
7167                 dev_err(&pdev->dev, "controller message %02x:%02x timed out\n",
7168                         opcode, type);
7169                 return -ETIMEDOUT;
7170         }
7171
7172         dma_free_coherent(&pdev->dev, cmd_sz, cmd, paddr64);
7173
7174         if (tag & HPSA_ERROR_BIT) {
7175                 dev_err(&pdev->dev, "controller message %02x:%02x failed\n",
7176                         opcode, type);
7177                 return -EIO;
7178         }
7179
7180         dev_info(&pdev->dev, "controller message %02x:%02x succeeded\n",
7181                 opcode, type);
7182         return 0;
7183 }
7184
7185 #define hpsa_noop(p) hpsa_message(p, 3, 0)
7186
7187 static int hpsa_controller_hard_reset(struct pci_dev *pdev,
7188         void __iomem *vaddr, u32 use_doorbell)
7189 {
7190
7191         if (use_doorbell) {
7192                 /* For everything after the P600, the PCI power state method
7193                  * of resetting the controller doesn't work, so we have this
7194                  * other way using the doorbell register.
7195                  */
7196                 dev_info(&pdev->dev, "using doorbell to reset controller\n");
7197                 writel(use_doorbell, vaddr + SA5_DOORBELL);
7198
7199                 /* PMC hardware guys tell us we need a 10 second delay after
7200                  * doorbell reset and before any attempt to talk to the board
7201                  * at all to ensure that this actually works and doesn't fall
7202                  * over in some weird corner cases.
7203                  */
7204                 msleep(10000);
7205         } else { /* Try to do it the PCI power state way */
7206
7207                 /* Quoting from the Open CISS Specification: "The Power
7208                  * Management Control/Status Register (CSR) controls the power
7209                  * state of the device.  The normal operating state is D0,
7210                  * CSR=00h.  The software off state is D3, CSR=03h.  To reset
7211                  * the controller, place the interface device in D3 then to D0,
7212                  * this causes a secondary PCI reset which will reset the
7213                  * controller." */
7214
7215                 int rc = 0;
7216
7217                 dev_info(&pdev->dev, "using PCI PM to reset controller\n");
7218
7219                 /* enter the D3hot power management state */
7220                 rc = pci_set_power_state(pdev, PCI_D3hot);
7221                 if (rc)
7222                         return rc;
7223
7224                 msleep(500);
7225
7226                 /* enter the D0 power management state */
7227                 rc = pci_set_power_state(pdev, PCI_D0);
7228                 if (rc)
7229                         return rc;
7230
7231                 /*
7232                  * The P600 requires a small delay when changing states.
7233                  * Otherwise we may think the board did not reset and we bail.
7234                  * This for kdump only and is particular to the P600.
7235                  */
7236                 msleep(500);
7237         }
7238         return 0;
7239 }
7240
7241 static void init_driver_version(char *driver_version, int len)
7242 {
7243         memset(driver_version, 0, len);
7244         strncpy(driver_version, HPSA " " HPSA_DRIVER_VERSION, len - 1);
7245 }
7246
7247 static int write_driver_ver_to_cfgtable(struct CfgTable __iomem *cfgtable)
7248 {
7249         char *driver_version;
7250         int i, size = sizeof(cfgtable->driver_version);
7251
7252         driver_version = kmalloc(size, GFP_KERNEL);
7253         if (!driver_version)
7254                 return -ENOMEM;
7255
7256         init_driver_version(driver_version, size);
7257         for (i = 0; i < size; i++)
7258                 writeb(driver_version[i], &cfgtable->driver_version[i]);
7259         kfree(driver_version);
7260         return 0;
7261 }
7262
7263 static void read_driver_ver_from_cfgtable(struct CfgTable __iomem *cfgtable,
7264                                           unsigned char *driver_ver)
7265 {
7266         int i;
7267
7268         for (i = 0; i < sizeof(cfgtable->driver_version); i++)
7269                 driver_ver[i] = readb(&cfgtable->driver_version[i]);
7270 }
7271
7272 static int controller_reset_failed(struct CfgTable __iomem *cfgtable)
7273 {
7274
7275         char *driver_ver, *old_driver_ver;
7276         int rc, size = sizeof(cfgtable->driver_version);
7277
7278         old_driver_ver = kmalloc_array(2, size, GFP_KERNEL);
7279         if (!old_driver_ver)
7280                 return -ENOMEM;
7281         driver_ver = old_driver_ver + size;
7282
7283         /* After a reset, the 32 bytes of "driver version" in the cfgtable
7284          * should have been changed, otherwise we know the reset failed.
7285          */
7286         init_driver_version(old_driver_ver, size);
7287         read_driver_ver_from_cfgtable(cfgtable, driver_ver);
7288         rc = !memcmp(driver_ver, old_driver_ver, size);
7289         kfree(old_driver_ver);
7290         return rc;
7291 }
7292 /* This does a hard reset of the controller using PCI power management
7293  * states or the using the doorbell register.
7294  */
7295 static int hpsa_kdump_hard_reset_controller(struct pci_dev *pdev, u32 board_id)
7296 {
7297         u64 cfg_offset;
7298         u32 cfg_base_addr;
7299         u64 cfg_base_addr_index;
7300         void __iomem *vaddr;
7301         unsigned long paddr;
7302         u32 misc_fw_support;
7303         int rc;
7304         struct CfgTable __iomem *cfgtable;
7305         u32 use_doorbell;
7306         u16 command_register;
7307
7308         /* For controllers as old as the P600, this is very nearly
7309          * the same thing as
7310          *
7311          * pci_save_state(pci_dev);
7312          * pci_set_power_state(pci_dev, PCI_D3hot);
7313          * pci_set_power_state(pci_dev, PCI_D0);
7314          * pci_restore_state(pci_dev);
7315          *
7316          * For controllers newer than the P600, the pci power state
7317          * method of resetting doesn't work so we have another way
7318          * using the doorbell register.
7319          */
7320
7321         if (!ctlr_is_resettable(board_id)) {
7322                 dev_warn(&pdev->dev, "Controller not resettable\n");
7323                 return -ENODEV;
7324         }
7325
7326         /* if controller is soft- but not hard resettable... */
7327         if (!ctlr_is_hard_resettable(board_id))
7328                 return -ENOTSUPP; /* try soft reset later. */
7329
7330         /* Save the PCI command register */
7331         pci_read_config_word(pdev, 4, &command_register);
7332         pci_save_state(pdev);
7333
7334         /* find the first memory BAR, so we can find the cfg table */
7335         rc = hpsa_pci_find_memory_BAR(pdev, &paddr);
7336         if (rc)
7337                 return rc;
7338         vaddr = remap_pci_mem(paddr, 0x250);
7339         if (!vaddr)
7340                 return -ENOMEM;
7341
7342         /* find cfgtable in order to check if reset via doorbell is supported */
7343         rc = hpsa_find_cfg_addrs(pdev, vaddr, &cfg_base_addr,
7344                                         &cfg_base_addr_index, &cfg_offset);
7345         if (rc)
7346                 goto unmap_vaddr;
7347         cfgtable = remap_pci_mem(pci_resource_start(pdev,
7348                        cfg_base_addr_index) + cfg_offset, sizeof(*cfgtable));
7349         if (!cfgtable) {
7350                 rc = -ENOMEM;
7351                 goto unmap_vaddr;
7352         }
7353         rc = write_driver_ver_to_cfgtable(cfgtable);
7354         if (rc)
7355                 goto unmap_cfgtable;
7356
7357         /* If reset via doorbell register is supported, use that.
7358          * There are two such methods.  Favor the newest method.
7359          */
7360         misc_fw_support = readl(&cfgtable->misc_fw_support);
7361         use_doorbell = misc_fw_support & MISC_FW_DOORBELL_RESET2;
7362         if (use_doorbell) {
7363                 use_doorbell = DOORBELL_CTLR_RESET2;
7364         } else {
7365                 use_doorbell = misc_fw_support & MISC_FW_DOORBELL_RESET;
7366                 if (use_doorbell) {
7367                         dev_warn(&pdev->dev,
7368                                 "Soft reset not supported. Firmware update is required.\n");
7369                         rc = -ENOTSUPP; /* try soft reset */
7370                         goto unmap_cfgtable;
7371                 }
7372         }
7373
7374         rc = hpsa_controller_hard_reset(pdev, vaddr, use_doorbell);
7375         if (rc)
7376                 goto unmap_cfgtable;
7377
7378         pci_restore_state(pdev);
7379         pci_write_config_word(pdev, 4, command_register);
7380
7381         /* Some devices (notably the HP Smart Array 5i Controller)
7382            need a little pause here */
7383         msleep(HPSA_POST_RESET_PAUSE_MSECS);
7384
7385         rc = hpsa_wait_for_board_state(pdev, vaddr, BOARD_READY);
7386         if (rc) {
7387                 dev_warn(&pdev->dev,
7388                         "Failed waiting for board to become ready after hard reset\n");
7389                 goto unmap_cfgtable;
7390         }
7391
7392         rc = controller_reset_failed(vaddr);
7393         if (rc < 0)
7394                 goto unmap_cfgtable;
7395         if (rc) {
7396                 dev_warn(&pdev->dev, "Unable to successfully reset "
7397                         "controller. Will try soft reset.\n");
7398                 rc = -ENOTSUPP;
7399         } else {
7400                 dev_info(&pdev->dev, "board ready after hard reset.\n");
7401         }
7402
7403 unmap_cfgtable:
7404         iounmap(cfgtable);
7405
7406 unmap_vaddr:
7407         iounmap(vaddr);
7408         return rc;
7409 }
7410
7411 /*
7412  *  We cannot read the structure directly, for portability we must use
7413  *   the io functions.
7414  *   This is for debug only.
7415  */
7416 static void print_cfg_table(struct device *dev, struct CfgTable __iomem *tb)
7417 {
7418 #ifdef HPSA_DEBUG
7419         int i;
7420         char temp_name[17];
7421
7422         dev_info(dev, "Controller Configuration information\n");
7423         dev_info(dev, "------------------------------------\n");
7424         for (i = 0; i < 4; i++)
7425                 temp_name[i] = readb(&(tb->Signature[i]));
7426         temp_name[4] = '\0';
7427         dev_info(dev, "   Signature = %s\n", temp_name);
7428         dev_info(dev, "   Spec Number = %d\n", readl(&(tb->SpecValence)));
7429         dev_info(dev, "   Transport methods supported = 0x%x\n",
7430                readl(&(tb->TransportSupport)));
7431         dev_info(dev, "   Transport methods active = 0x%x\n",
7432                readl(&(tb->TransportActive)));
7433         dev_info(dev, "   Requested transport Method = 0x%x\n",
7434                readl(&(tb->HostWrite.TransportRequest)));
7435         dev_info(dev, "   Coalesce Interrupt Delay = 0x%x\n",
7436                readl(&(tb->HostWrite.CoalIntDelay)));
7437         dev_info(dev, "   Coalesce Interrupt Count = 0x%x\n",
7438                readl(&(tb->HostWrite.CoalIntCount)));
7439         dev_info(dev, "   Max outstanding commands = %d\n",
7440                readl(&(tb->CmdsOutMax)));
7441         dev_info(dev, "   Bus Types = 0x%x\n", readl(&(tb->BusTypes)));
7442         for (i = 0; i < 16; i++)
7443                 temp_name[i] = readb(&(tb->ServerName[i]));
7444         temp_name[16] = '\0';
7445         dev_info(dev, "   Server Name = %s\n", temp_name);
7446         dev_info(dev, "   Heartbeat Counter = 0x%x\n\n\n",
7447                 readl(&(tb->HeartBeat)));
7448 #endif                          /* HPSA_DEBUG */
7449 }
7450
7451 static int find_PCI_BAR_index(struct pci_dev *pdev, unsigned long pci_bar_addr)
7452 {
7453         int i, offset, mem_type, bar_type;
7454
7455         if (pci_bar_addr == PCI_BASE_ADDRESS_0) /* looking for BAR zero? */
7456                 return 0;
7457         offset = 0;
7458         for (i = 0; i < DEVICE_COUNT_RESOURCE; i++) {
7459                 bar_type = pci_resource_flags(pdev, i) & PCI_BASE_ADDRESS_SPACE;
7460                 if (bar_type == PCI_BASE_ADDRESS_SPACE_IO)
7461                         offset += 4;
7462                 else {
7463                         mem_type = pci_resource_flags(pdev, i) &
7464                             PCI_BASE_ADDRESS_MEM_TYPE_MASK;
7465                         switch (mem_type) {
7466                         case PCI_BASE_ADDRESS_MEM_TYPE_32:
7467                         case PCI_BASE_ADDRESS_MEM_TYPE_1M:
7468                                 offset += 4;    /* 32 bit */
7469                                 break;
7470                         case PCI_BASE_ADDRESS_MEM_TYPE_64:
7471                                 offset += 8;
7472                                 break;
7473                         default:        /* reserved in PCI 2.2 */
7474                                 dev_warn(&pdev->dev,
7475                                        "base address is invalid\n");
7476                                 return -1;
7477                         }
7478                 }
7479                 if (offset == pci_bar_addr - PCI_BASE_ADDRESS_0)
7480                         return i + 1;
7481         }
7482         return -1;
7483 }
7484
7485 static void hpsa_disable_interrupt_mode(struct ctlr_info *h)
7486 {
7487         pci_free_irq_vectors(h->pdev);
7488         h->msix_vectors = 0;
7489 }
7490
7491 static void hpsa_setup_reply_map(struct ctlr_info *h)
7492 {
7493         const struct cpumask *mask;
7494         unsigned int queue, cpu;
7495
7496         for (queue = 0; queue < h->msix_vectors; queue++) {
7497                 mask = pci_irq_get_affinity(h->pdev, queue);
7498                 if (!mask)
7499                         goto fallback;
7500
7501                 for_each_cpu(cpu, mask)
7502                         h->reply_map[cpu] = queue;
7503         }
7504         return;
7505
7506 fallback:
7507         for_each_possible_cpu(cpu)
7508                 h->reply_map[cpu] = 0;
7509 }
7510
7511 /* If MSI/MSI-X is supported by the kernel we will try to enable it on
7512  * controllers that are capable. If not, we use legacy INTx mode.
7513  */
7514 static int hpsa_interrupt_mode(struct ctlr_info *h)
7515 {
7516         unsigned int flags = PCI_IRQ_LEGACY;
7517         int ret;
7518
7519         /* Some boards advertise MSI but don't really support it */
7520         switch (h->board_id) {
7521         case 0x40700E11:
7522         case 0x40800E11:
7523         case 0x40820E11:
7524         case 0x40830E11:
7525                 break;
7526         default:
7527                 ret = pci_alloc_irq_vectors(h->pdev, 1, MAX_REPLY_QUEUES,
7528                                 PCI_IRQ_MSIX | PCI_IRQ_AFFINITY);
7529                 if (ret > 0) {
7530                         h->msix_vectors = ret;
7531                         return 0;
7532                 }
7533
7534                 flags |= PCI_IRQ_MSI;
7535                 break;
7536         }
7537
7538         ret = pci_alloc_irq_vectors(h->pdev, 1, 1, flags);
7539         if (ret < 0)
7540                 return ret;
7541         return 0;
7542 }
7543
7544 static int hpsa_lookup_board_id(struct pci_dev *pdev, u32 *board_id,
7545                                 bool *legacy_board)
7546 {
7547         int i;
7548         u32 subsystem_vendor_id, subsystem_device_id;
7549
7550         subsystem_vendor_id = pdev->subsystem_vendor;
7551         subsystem_device_id = pdev->subsystem_device;
7552         *board_id = ((subsystem_device_id << 16) & 0xffff0000) |
7553                     subsystem_vendor_id;
7554
7555         if (legacy_board)
7556                 *legacy_board = false;
7557         for (i = 0; i < ARRAY_SIZE(products); i++)
7558                 if (*board_id == products[i].board_id) {
7559                         if (products[i].access != &SA5A_access &&
7560                             products[i].access != &SA5B_access)
7561                                 return i;
7562                         dev_warn(&pdev->dev,
7563                                  "legacy board ID: 0x%08x\n",
7564                                  *board_id);
7565                         if (legacy_board)
7566                             *legacy_board = true;
7567                         return i;
7568                 }
7569
7570         dev_warn(&pdev->dev, "unrecognized board ID: 0x%08x\n", *board_id);
7571         if (legacy_board)
7572                 *legacy_board = true;
7573         return ARRAY_SIZE(products) - 1; /* generic unknown smart array */
7574 }
7575
7576 static int hpsa_pci_find_memory_BAR(struct pci_dev *pdev,
7577                                     unsigned long *memory_bar)
7578 {
7579         int i;
7580
7581         for (i = 0; i < DEVICE_COUNT_RESOURCE; i++)
7582                 if (pci_resource_flags(pdev, i) & IORESOURCE_MEM) {
7583                         /* addressing mode bits already removed */
7584                         *memory_bar = pci_resource_start(pdev, i);
7585                         dev_dbg(&pdev->dev, "memory BAR = %lx\n",
7586                                 *memory_bar);
7587                         return 0;
7588                 }
7589         dev_warn(&pdev->dev, "no memory BAR found\n");
7590         return -ENODEV;
7591 }
7592
7593 static int hpsa_wait_for_board_state(struct pci_dev *pdev, void __iomem *vaddr,
7594                                      int wait_for_ready)
7595 {
7596         int i, iterations;
7597         u32 scratchpad;
7598         if (wait_for_ready)
7599                 iterations = HPSA_BOARD_READY_ITERATIONS;
7600         else
7601                 iterations = HPSA_BOARD_NOT_READY_ITERATIONS;
7602
7603         for (i = 0; i < iterations; i++) {
7604                 scratchpad = readl(vaddr + SA5_SCRATCHPAD_OFFSET);
7605                 if (wait_for_ready) {
7606                         if (scratchpad == HPSA_FIRMWARE_READY)
7607                                 return 0;
7608                 } else {
7609                         if (scratchpad != HPSA_FIRMWARE_READY)
7610                                 return 0;
7611                 }
7612                 msleep(HPSA_BOARD_READY_POLL_INTERVAL_MSECS);
7613         }
7614         dev_warn(&pdev->dev, "board not ready, timed out.\n");
7615         return -ENODEV;
7616 }
7617
7618 static int hpsa_find_cfg_addrs(struct pci_dev *pdev, void __iomem *vaddr,
7619                                u32 *cfg_base_addr, u64 *cfg_base_addr_index,
7620                                u64 *cfg_offset)
7621 {
7622         *cfg_base_addr = readl(vaddr + SA5_CTCFG_OFFSET);
7623         *cfg_offset = readl(vaddr + SA5_CTMEM_OFFSET);
7624         *cfg_base_addr &= (u32) 0x0000ffff;
7625         *cfg_base_addr_index = find_PCI_BAR_index(pdev, *cfg_base_addr);
7626         if (*cfg_base_addr_index == -1) {
7627                 dev_warn(&pdev->dev, "cannot find cfg_base_addr_index\n");
7628                 return -ENODEV;
7629         }
7630         return 0;
7631 }
7632
7633 static void hpsa_free_cfgtables(struct ctlr_info *h)
7634 {
7635         if (h->transtable) {
7636                 iounmap(h->transtable);
7637                 h->transtable = NULL;
7638         }
7639         if (h->cfgtable) {
7640                 iounmap(h->cfgtable);
7641                 h->cfgtable = NULL;
7642         }
7643 }
7644
7645 /* Find and map CISS config table and transfer table
7646 + * several items must be unmapped (freed) later
7647 + * */
7648 static int hpsa_find_cfgtables(struct ctlr_info *h)
7649 {
7650         u64 cfg_offset;
7651         u32 cfg_base_addr;
7652         u64 cfg_base_addr_index;
7653         u32 trans_offset;
7654         int rc;
7655
7656         rc = hpsa_find_cfg_addrs(h->pdev, h->vaddr, &cfg_base_addr,
7657                 &cfg_base_addr_index, &cfg_offset);
7658         if (rc)
7659                 return rc;
7660         h->cfgtable = remap_pci_mem(pci_resource_start(h->pdev,
7661                        cfg_base_addr_index) + cfg_offset, sizeof(*h->cfgtable));
7662         if (!h->cfgtable) {
7663                 dev_err(&h->pdev->dev, "Failed mapping cfgtable\n");
7664                 return -ENOMEM;
7665         }
7666         rc = write_driver_ver_to_cfgtable(h->cfgtable);
7667         if (rc)
7668                 return rc;
7669         /* Find performant mode table. */
7670         trans_offset = readl(&h->cfgtable->TransMethodOffset);
7671         h->transtable = remap_pci_mem(pci_resource_start(h->pdev,
7672                                 cfg_base_addr_index)+cfg_offset+trans_offset,
7673                                 sizeof(*h->transtable));
7674         if (!h->transtable) {
7675                 dev_err(&h->pdev->dev, "Failed mapping transfer table\n");
7676                 hpsa_free_cfgtables(h);
7677                 return -ENOMEM;
7678         }
7679         return 0;
7680 }
7681
7682 static void hpsa_get_max_perf_mode_cmds(struct ctlr_info *h)
7683 {
7684 #define MIN_MAX_COMMANDS 16
7685         BUILD_BUG_ON(MIN_MAX_COMMANDS <= HPSA_NRESERVED_CMDS);
7686
7687         h->max_commands = readl(&h->cfgtable->MaxPerformantModeCommands);
7688
7689         /* Limit commands in memory limited kdump scenario. */
7690         if (reset_devices && h->max_commands > 32)
7691                 h->max_commands = 32;
7692
7693         if (h->max_commands < MIN_MAX_COMMANDS) {
7694                 dev_warn(&h->pdev->dev,
7695                         "Controller reports max supported commands of %d Using %d instead. Ensure that firmware is up to date.\n",
7696                         h->max_commands,
7697                         MIN_MAX_COMMANDS);
7698                 h->max_commands = MIN_MAX_COMMANDS;
7699         }
7700 }
7701
7702 /* If the controller reports that the total max sg entries is greater than 512,
7703  * then we know that chained SG blocks work.  (Original smart arrays did not
7704  * support chained SG blocks and would return zero for max sg entries.)
7705  */
7706 static int hpsa_supports_chained_sg_blocks(struct ctlr_info *h)
7707 {
7708         return h->maxsgentries > 512;
7709 }
7710
7711 /* Interrogate the hardware for some limits:
7712  * max commands, max SG elements without chaining, and with chaining,
7713  * SG chain block size, etc.
7714  */
7715 static void hpsa_find_board_params(struct ctlr_info *h)
7716 {
7717         hpsa_get_max_perf_mode_cmds(h);
7718         h->nr_cmds = h->max_commands;
7719         h->maxsgentries = readl(&(h->cfgtable->MaxScatterGatherElements));
7720         h->fw_support = readl(&(h->cfgtable->misc_fw_support));
7721         if (hpsa_supports_chained_sg_blocks(h)) {
7722                 /* Limit in-command s/g elements to 32 save dma'able memory. */
7723                 h->max_cmd_sg_entries = 32;
7724                 h->chainsize = h->maxsgentries - h->max_cmd_sg_entries;
7725                 h->maxsgentries--; /* save one for chain pointer */
7726         } else {
7727                 /*
7728                  * Original smart arrays supported at most 31 s/g entries
7729                  * embedded inline in the command (trying to use more
7730                  * would lock up the controller)
7731                  */
7732                 h->max_cmd_sg_entries = 31;
7733                 h->maxsgentries = 31; /* default to traditional values */
7734                 h->chainsize = 0;
7735         }
7736
7737         /* Find out what task management functions are supported and cache */
7738         h->TMFSupportFlags = readl(&(h->cfgtable->TMFSupportFlags));
7739         if (!(HPSATMF_PHYS_TASK_ABORT & h->TMFSupportFlags))
7740                 dev_warn(&h->pdev->dev, "Physical aborts not supported\n");
7741         if (!(HPSATMF_LOG_TASK_ABORT & h->TMFSupportFlags))
7742                 dev_warn(&h->pdev->dev, "Logical aborts not supported\n");
7743         if (!(HPSATMF_IOACCEL_ENABLED & h->TMFSupportFlags))
7744                 dev_warn(&h->pdev->dev, "HP SSD Smart Path aborts not supported\n");
7745 }
7746
7747 static inline bool hpsa_CISS_signature_present(struct ctlr_info *h)
7748 {
7749         if (!check_signature(h->cfgtable->Signature, "CISS", 4)) {
7750                 dev_err(&h->pdev->dev, "not a valid CISS config table\n");
7751                 return false;
7752         }
7753         return true;
7754 }
7755
7756 static inline void hpsa_set_driver_support_bits(struct ctlr_info *h)
7757 {
7758         u32 driver_support;
7759
7760         driver_support = readl(&(h->cfgtable->driver_support));
7761         /* Need to enable prefetch in the SCSI core for 6400 in x86 */
7762 #ifdef CONFIG_X86
7763         driver_support |= ENABLE_SCSI_PREFETCH;
7764 #endif
7765         driver_support |= ENABLE_UNIT_ATTN;
7766         writel(driver_support, &(h->cfgtable->driver_support));
7767 }
7768
7769 /* Disable DMA prefetch for the P600.  Otherwise an ASIC bug may result
7770  * in a prefetch beyond physical memory.
7771  */
7772 static inline void hpsa_p600_dma_prefetch_quirk(struct ctlr_info *h)
7773 {
7774         u32 dma_prefetch;
7775
7776         if (h->board_id != 0x3225103C)
7777                 return;
7778         dma_prefetch = readl(h->vaddr + I2O_DMA1_CFG);
7779         dma_prefetch |= 0x8000;
7780         writel(dma_prefetch, h->vaddr + I2O_DMA1_CFG);
7781 }
7782
7783 static int hpsa_wait_for_clear_event_notify_ack(struct ctlr_info *h)
7784 {
7785         int i;
7786         u32 doorbell_value;
7787         unsigned long flags;
7788         /* wait until the clear_event_notify bit 6 is cleared by controller. */
7789         for (i = 0; i < MAX_CLEAR_EVENT_WAIT; i++) {
7790                 spin_lock_irqsave(&h->lock, flags);
7791                 doorbell_value = readl(h->vaddr + SA5_DOORBELL);
7792                 spin_unlock_irqrestore(&h->lock, flags);
7793                 if (!(doorbell_value & DOORBELL_CLEAR_EVENTS))
7794                         goto done;
7795                 /* delay and try again */
7796                 msleep(CLEAR_EVENT_WAIT_INTERVAL);
7797         }
7798         return -ENODEV;
7799 done:
7800         return 0;
7801 }
7802
7803 static int hpsa_wait_for_mode_change_ack(struct ctlr_info *h)
7804 {
7805         int i;
7806         u32 doorbell_value;
7807         unsigned long flags;
7808
7809         /* under certain very rare conditions, this can take awhile.
7810          * (e.g.: hot replace a failed 144GB drive in a RAID 5 set right
7811          * as we enter this code.)
7812          */
7813         for (i = 0; i < MAX_MODE_CHANGE_WAIT; i++) {
7814                 if (h->remove_in_progress)
7815                         goto done;
7816                 spin_lock_irqsave(&h->lock, flags);
7817                 doorbell_value = readl(h->vaddr + SA5_DOORBELL);
7818                 spin_unlock_irqrestore(&h->lock, flags);
7819                 if (!(doorbell_value & CFGTBL_ChangeReq))
7820                         goto done;
7821                 /* delay and try again */
7822                 msleep(MODE_CHANGE_WAIT_INTERVAL);
7823         }
7824         return -ENODEV;
7825 done:
7826         return 0;
7827 }
7828
7829 /* return -ENODEV or other reason on error, 0 on success */
7830 static int hpsa_enter_simple_mode(struct ctlr_info *h)
7831 {
7832         u32 trans_support;
7833
7834         trans_support = readl(&(h->cfgtable->TransportSupport));
7835         if (!(trans_support & SIMPLE_MODE))
7836                 return -ENOTSUPP;
7837
7838         h->max_commands = readl(&(h->cfgtable->CmdsOutMax));
7839
7840         /* Update the field, and then ring the doorbell */
7841         writel(CFGTBL_Trans_Simple, &(h->cfgtable->HostWrite.TransportRequest));
7842         writel(0, &h->cfgtable->HostWrite.command_pool_addr_hi);
7843         writel(CFGTBL_ChangeReq, h->vaddr + SA5_DOORBELL);
7844         if (hpsa_wait_for_mode_change_ack(h))
7845                 goto error;
7846         print_cfg_table(&h->pdev->dev, h->cfgtable);
7847         if (!(readl(&(h->cfgtable->TransportActive)) & CFGTBL_Trans_Simple))
7848                 goto error;
7849         h->transMethod = CFGTBL_Trans_Simple;
7850         return 0;
7851 error:
7852         dev_err(&h->pdev->dev, "failed to enter simple mode\n");
7853         return -ENODEV;
7854 }
7855
7856 /* free items allocated or mapped by hpsa_pci_init */
7857 static void hpsa_free_pci_init(struct ctlr_info *h)
7858 {
7859         hpsa_free_cfgtables(h);                 /* pci_init 4 */
7860         iounmap(h->vaddr);                      /* pci_init 3 */
7861         h->vaddr = NULL;
7862         hpsa_disable_interrupt_mode(h);         /* pci_init 2 */
7863         /*
7864          * call pci_disable_device before pci_release_regions per
7865          * Documentation/driver-api/pci/pci.rst
7866          */
7867         pci_disable_device(h->pdev);            /* pci_init 1 */
7868         pci_release_regions(h->pdev);           /* pci_init 2 */
7869 }
7870
7871 /* several items must be freed later */
7872 static int hpsa_pci_init(struct ctlr_info *h)
7873 {
7874         int prod_index, err;
7875         bool legacy_board;
7876
7877         prod_index = hpsa_lookup_board_id(h->pdev, &h->board_id, &legacy_board);
7878         if (prod_index < 0)
7879                 return prod_index;
7880         h->product_name = products[prod_index].product_name;
7881         h->access = *(products[prod_index].access);
7882         h->legacy_board = legacy_board;
7883         pci_disable_link_state(h->pdev, PCIE_LINK_STATE_L0S |
7884                                PCIE_LINK_STATE_L1 | PCIE_LINK_STATE_CLKPM);
7885
7886         err = pci_enable_device(h->pdev);
7887         if (err) {
7888                 dev_err(&h->pdev->dev, "failed to enable PCI device\n");
7889                 pci_disable_device(h->pdev);
7890                 return err;
7891         }
7892
7893         err = pci_request_regions(h->pdev, HPSA);
7894         if (err) {
7895                 dev_err(&h->pdev->dev,
7896                         "failed to obtain PCI resources\n");
7897                 pci_disable_device(h->pdev);
7898                 return err;
7899         }
7900
7901         pci_set_master(h->pdev);
7902
7903         err = hpsa_interrupt_mode(h);
7904         if (err)
7905                 goto clean1;
7906
7907         /* setup mapping between CPU and reply queue */
7908         hpsa_setup_reply_map(h);
7909
7910         err = hpsa_pci_find_memory_BAR(h->pdev, &h->paddr);
7911         if (err)
7912                 goto clean2;    /* intmode+region, pci */
7913         h->vaddr = remap_pci_mem(h->paddr, 0x250);
7914         if (!h->vaddr) {
7915                 dev_err(&h->pdev->dev, "failed to remap PCI mem\n");
7916                 err = -ENOMEM;
7917                 goto clean2;    /* intmode+region, pci */
7918         }
7919         err = hpsa_wait_for_board_state(h->pdev, h->vaddr, BOARD_READY);
7920         if (err)
7921                 goto clean3;    /* vaddr, intmode+region, pci */
7922         err = hpsa_find_cfgtables(h);
7923         if (err)
7924                 goto clean3;    /* vaddr, intmode+region, pci */
7925         hpsa_find_board_params(h);
7926
7927         if (!hpsa_CISS_signature_present(h)) {
7928                 err = -ENODEV;
7929                 goto clean4;    /* cfgtables, vaddr, intmode+region, pci */
7930         }
7931         hpsa_set_driver_support_bits(h);
7932         hpsa_p600_dma_prefetch_quirk(h);
7933         err = hpsa_enter_simple_mode(h);
7934         if (err)
7935                 goto clean4;    /* cfgtables, vaddr, intmode+region, pci */
7936         return 0;
7937
7938 clean4: /* cfgtables, vaddr, intmode+region, pci */
7939         hpsa_free_cfgtables(h);
7940 clean3: /* vaddr, intmode+region, pci */
7941         iounmap(h->vaddr);
7942         h->vaddr = NULL;
7943 clean2: /* intmode+region, pci */
7944         hpsa_disable_interrupt_mode(h);
7945 clean1:
7946         /*
7947          * call pci_disable_device before pci_release_regions per
7948          * Documentation/driver-api/pci/pci.rst
7949          */
7950         pci_disable_device(h->pdev);
7951         pci_release_regions(h->pdev);
7952         return err;
7953 }
7954
7955 static void hpsa_hba_inquiry(struct ctlr_info *h)
7956 {
7957         int rc;
7958
7959 #define HBA_INQUIRY_BYTE_COUNT 64
7960         h->hba_inquiry_data = kmalloc(HBA_INQUIRY_BYTE_COUNT, GFP_KERNEL);
7961         if (!h->hba_inquiry_data)
7962                 return;
7963         rc = hpsa_scsi_do_inquiry(h, RAID_CTLR_LUNID, 0,
7964                 h->hba_inquiry_data, HBA_INQUIRY_BYTE_COUNT);
7965         if (rc != 0) {
7966                 kfree(h->hba_inquiry_data);
7967                 h->hba_inquiry_data = NULL;
7968         }
7969 }
7970
7971 static int hpsa_init_reset_devices(struct pci_dev *pdev, u32 board_id)
7972 {
7973         int rc, i;
7974         void __iomem *vaddr;
7975
7976         if (!reset_devices)
7977                 return 0;
7978
7979         /* kdump kernel is loading, we don't know in which state is
7980          * the pci interface. The dev->enable_cnt is equal zero
7981          * so we call enable+disable, wait a while and switch it on.
7982          */
7983         rc = pci_enable_device(pdev);
7984         if (rc) {
7985                 dev_warn(&pdev->dev, "Failed to enable PCI device\n");
7986                 return -ENODEV;
7987         }
7988         pci_disable_device(pdev);
7989         msleep(260);                    /* a randomly chosen number */
7990         rc = pci_enable_device(pdev);
7991         if (rc) {
7992                 dev_warn(&pdev->dev, "failed to enable device.\n");
7993                 return -ENODEV;
7994         }
7995
7996         pci_set_master(pdev);
7997
7998         vaddr = pci_ioremap_bar(pdev, 0);
7999         if (vaddr == NULL) {
8000                 rc = -ENOMEM;
8001                 goto out_disable;
8002         }
8003         writel(SA5_INTR_OFF, vaddr + SA5_REPLY_INTR_MASK_OFFSET);
8004         iounmap(vaddr);
8005
8006         /* Reset the controller with a PCI power-cycle or via doorbell */
8007         rc = hpsa_kdump_hard_reset_controller(pdev, board_id);
8008
8009         /* -ENOTSUPP here means we cannot reset the controller
8010          * but it's already (and still) up and running in
8011          * "performant mode".  Or, it might be 640x, which can't reset
8012          * due to concerns about shared bbwc between 6402/6404 pair.
8013          */
8014         if (rc)
8015                 goto out_disable;
8016
8017         /* Now try to get the controller to respond to a no-op */
8018         dev_info(&pdev->dev, "Waiting for controller to respond to no-op\n");
8019         for (i = 0; i < HPSA_POST_RESET_NOOP_RETRIES; i++) {
8020                 if (hpsa_noop(pdev) == 0)
8021                         break;
8022                 else
8023                         dev_warn(&pdev->dev, "no-op failed%s\n",
8024                                         (i < 11 ? "; re-trying" : ""));
8025         }
8026
8027 out_disable:
8028
8029         pci_disable_device(pdev);
8030         return rc;
8031 }
8032
8033 static void hpsa_free_cmd_pool(struct ctlr_info *h)
8034 {
8035         kfree(h->cmd_pool_bits);
8036         h->cmd_pool_bits = NULL;
8037         if (h->cmd_pool) {
8038                 dma_free_coherent(&h->pdev->dev,
8039                                 h->nr_cmds * sizeof(struct CommandList),
8040                                 h->cmd_pool,
8041                                 h->cmd_pool_dhandle);
8042                 h->cmd_pool = NULL;
8043                 h->cmd_pool_dhandle = 0;
8044         }
8045         if (h->errinfo_pool) {
8046                 dma_free_coherent(&h->pdev->dev,
8047                                 h->nr_cmds * sizeof(struct ErrorInfo),
8048                                 h->errinfo_pool,
8049                                 h->errinfo_pool_dhandle);
8050                 h->errinfo_pool = NULL;
8051                 h->errinfo_pool_dhandle = 0;
8052         }
8053 }
8054
8055 static int hpsa_alloc_cmd_pool(struct ctlr_info *h)
8056 {
8057         h->cmd_pool_bits = kcalloc(DIV_ROUND_UP(h->nr_cmds, BITS_PER_LONG),
8058                                    sizeof(unsigned long),
8059                                    GFP_KERNEL);
8060         h->cmd_pool = dma_alloc_coherent(&h->pdev->dev,
8061                     h->nr_cmds * sizeof(*h->cmd_pool),
8062                     &h->cmd_pool_dhandle, GFP_KERNEL);
8063         h->errinfo_pool = dma_alloc_coherent(&h->pdev->dev,
8064                     h->nr_cmds * sizeof(*h->errinfo_pool),
8065                     &h->errinfo_pool_dhandle, GFP_KERNEL);
8066         if ((h->cmd_pool_bits == NULL)
8067             || (h->cmd_pool == NULL)
8068             || (h->errinfo_pool == NULL)) {
8069                 dev_err(&h->pdev->dev, "out of memory in %s", __func__);
8070                 goto clean_up;
8071         }
8072         hpsa_preinitialize_commands(h);
8073         return 0;
8074 clean_up:
8075         hpsa_free_cmd_pool(h);
8076         return -ENOMEM;
8077 }
8078
8079 /* clear affinity hints and free MSI-X, MSI, or legacy INTx vectors */
8080 static void hpsa_free_irqs(struct ctlr_info *h)
8081 {
8082         int i;
8083         int irq_vector = 0;
8084
8085         if (hpsa_simple_mode)
8086                 irq_vector = h->intr_mode;
8087
8088         if (!h->msix_vectors || h->intr_mode != PERF_MODE_INT) {
8089                 /* Single reply queue, only one irq to free */
8090                 free_irq(pci_irq_vector(h->pdev, irq_vector),
8091                                 &h->q[h->intr_mode]);
8092                 h->q[h->intr_mode] = 0;
8093                 return;
8094         }
8095
8096         for (i = 0; i < h->msix_vectors; i++) {
8097                 free_irq(pci_irq_vector(h->pdev, i), &h->q[i]);
8098                 h->q[i] = 0;
8099         }
8100         for (; i < MAX_REPLY_QUEUES; i++)
8101                 h->q[i] = 0;
8102 }
8103
8104 /* returns 0 on success; cleans up and returns -Enn on error */
8105 static int hpsa_request_irqs(struct ctlr_info *h,
8106         irqreturn_t (*msixhandler)(int, void *),
8107         irqreturn_t (*intxhandler)(int, void *))
8108 {
8109         int rc, i;
8110         int irq_vector = 0;
8111
8112         if (hpsa_simple_mode)
8113                 irq_vector = h->intr_mode;
8114
8115         /*
8116          * initialize h->q[x] = x so that interrupt handlers know which
8117          * queue to process.
8118          */
8119         for (i = 0; i < MAX_REPLY_QUEUES; i++)
8120                 h->q[i] = (u8) i;
8121
8122         if (h->intr_mode == PERF_MODE_INT && h->msix_vectors > 0) {
8123                 /* If performant mode and MSI-X, use multiple reply queues */
8124                 for (i = 0; i < h->msix_vectors; i++) {
8125                         sprintf(h->intrname[i], "%s-msix%d", h->devname, i);
8126                         rc = request_irq(pci_irq_vector(h->pdev, i), msixhandler,
8127                                         0, h->intrname[i],
8128                                         &h->q[i]);
8129                         if (rc) {
8130                                 int j;
8131
8132                                 dev_err(&h->pdev->dev,
8133                                         "failed to get irq %d for %s\n",
8134                                        pci_irq_vector(h->pdev, i), h->devname);
8135                                 for (j = 0; j < i; j++) {
8136                                         free_irq(pci_irq_vector(h->pdev, j), &h->q[j]);
8137                                         h->q[j] = 0;
8138                                 }
8139                                 for (; j < MAX_REPLY_QUEUES; j++)
8140                                         h->q[j] = 0;
8141                                 return rc;
8142                         }
8143                 }
8144         } else {
8145                 /* Use single reply pool */
8146                 if (h->msix_vectors > 0 || h->pdev->msi_enabled) {
8147                         sprintf(h->intrname[0], "%s-msi%s", h->devname,
8148                                 h->msix_vectors ? "x" : "");
8149                         rc = request_irq(pci_irq_vector(h->pdev, irq_vector),
8150                                 msixhandler, 0,
8151                                 h->intrname[0],
8152                                 &h->q[h->intr_mode]);
8153                 } else {
8154                         sprintf(h->intrname[h->intr_mode],
8155                                 "%s-intx", h->devname);
8156                         rc = request_irq(pci_irq_vector(h->pdev, irq_vector),
8157                                 intxhandler, IRQF_SHARED,
8158                                 h->intrname[0],
8159                                 &h->q[h->intr_mode]);
8160                 }
8161         }
8162         if (rc) {
8163                 dev_err(&h->pdev->dev, "failed to get irq %d for %s\n",
8164                        pci_irq_vector(h->pdev, irq_vector), h->devname);
8165                 hpsa_free_irqs(h);
8166                 return -ENODEV;
8167         }
8168         return 0;
8169 }
8170
8171 static int hpsa_kdump_soft_reset(struct ctlr_info *h)
8172 {
8173         int rc;
8174         hpsa_send_host_reset(h, HPSA_RESET_TYPE_CONTROLLER);
8175
8176         dev_info(&h->pdev->dev, "Waiting for board to soft reset.\n");
8177         rc = hpsa_wait_for_board_state(h->pdev, h->vaddr, BOARD_NOT_READY);
8178         if (rc) {
8179                 dev_warn(&h->pdev->dev, "Soft reset had no effect.\n");
8180                 return rc;
8181         }
8182
8183         dev_info(&h->pdev->dev, "Board reset, awaiting READY status.\n");
8184         rc = hpsa_wait_for_board_state(h->pdev, h->vaddr, BOARD_READY);
8185         if (rc) {
8186                 dev_warn(&h->pdev->dev, "Board failed to become ready "
8187                         "after soft reset.\n");
8188                 return rc;
8189         }
8190
8191         return 0;
8192 }
8193
8194 static void hpsa_free_reply_queues(struct ctlr_info *h)
8195 {
8196         int i;
8197
8198         for (i = 0; i < h->nreply_queues; i++) {
8199                 if (!h->reply_queue[i].head)
8200                         continue;
8201                 dma_free_coherent(&h->pdev->dev,
8202                                         h->reply_queue_size,
8203                                         h->reply_queue[i].head,
8204                                         h->reply_queue[i].busaddr);
8205                 h->reply_queue[i].head = NULL;
8206                 h->reply_queue[i].busaddr = 0;
8207         }
8208         h->reply_queue_size = 0;
8209 }
8210
8211 static void hpsa_undo_allocations_after_kdump_soft_reset(struct ctlr_info *h)
8212 {
8213         hpsa_free_performant_mode(h);           /* init_one 7 */
8214         hpsa_free_sg_chain_blocks(h);           /* init_one 6 */
8215         hpsa_free_cmd_pool(h);                  /* init_one 5 */
8216         hpsa_free_irqs(h);                      /* init_one 4 */
8217         scsi_host_put(h->scsi_host);            /* init_one 3 */
8218         h->scsi_host = NULL;                    /* init_one 3 */
8219         hpsa_free_pci_init(h);                  /* init_one 2_5 */
8220         free_percpu(h->lockup_detected);        /* init_one 2 */
8221         h->lockup_detected = NULL;              /* init_one 2 */
8222         if (h->resubmit_wq) {
8223                 destroy_workqueue(h->resubmit_wq);      /* init_one 1 */
8224                 h->resubmit_wq = NULL;
8225         }
8226         if (h->rescan_ctlr_wq) {
8227                 destroy_workqueue(h->rescan_ctlr_wq);
8228                 h->rescan_ctlr_wq = NULL;
8229         }
8230         if (h->monitor_ctlr_wq) {
8231                 destroy_workqueue(h->monitor_ctlr_wq);
8232                 h->monitor_ctlr_wq = NULL;
8233         }
8234
8235         kfree(h);                               /* init_one 1 */
8236 }
8237
8238 /* Called when controller lockup detected. */
8239 static void fail_all_outstanding_cmds(struct ctlr_info *h)
8240 {
8241         int i, refcount;
8242         struct CommandList *c;
8243         int failcount = 0;
8244
8245         flush_workqueue(h->resubmit_wq); /* ensure all cmds are fully built */
8246         for (i = 0; i < h->nr_cmds; i++) {
8247                 c = h->cmd_pool + i;
8248                 refcount = atomic_inc_return(&c->refcount);
8249                 if (refcount > 1) {
8250                         c->err_info->CommandStatus = CMD_CTLR_LOCKUP;
8251                         finish_cmd(c);
8252                         atomic_dec(&h->commands_outstanding);
8253                         failcount++;
8254                 }
8255                 cmd_free(h, c);
8256         }
8257         dev_warn(&h->pdev->dev,
8258                 "failed %d commands in fail_all\n", failcount);
8259 }
8260
8261 static void set_lockup_detected_for_all_cpus(struct ctlr_info *h, u32 value)
8262 {
8263         int cpu;
8264
8265         for_each_online_cpu(cpu) {
8266                 u32 *lockup_detected;
8267                 lockup_detected = per_cpu_ptr(h->lockup_detected, cpu);
8268                 *lockup_detected = value;
8269         }
8270         wmb(); /* be sure the per-cpu variables are out to memory */
8271 }
8272
8273 static void controller_lockup_detected(struct ctlr_info *h)
8274 {
8275         unsigned long flags;
8276         u32 lockup_detected;
8277
8278         h->access.set_intr_mask(h, HPSA_INTR_OFF);
8279         spin_lock_irqsave(&h->lock, flags);
8280         lockup_detected = readl(h->vaddr + SA5_SCRATCHPAD_OFFSET);
8281         if (!lockup_detected) {
8282                 /* no heartbeat, but controller gave us a zero. */
8283                 dev_warn(&h->pdev->dev,
8284                         "lockup detected after %d but scratchpad register is zero\n",
8285                         h->heartbeat_sample_interval / HZ);
8286                 lockup_detected = 0xffffffff;
8287         }
8288         set_lockup_detected_for_all_cpus(h, lockup_detected);
8289         spin_unlock_irqrestore(&h->lock, flags);
8290         dev_warn(&h->pdev->dev, "Controller lockup detected: 0x%08x after %d\n",
8291                         lockup_detected, h->heartbeat_sample_interval / HZ);
8292         if (lockup_detected == 0xffff0000) {
8293                 dev_warn(&h->pdev->dev, "Telling controller to do a CHKPT\n");
8294                 writel(DOORBELL_GENERATE_CHKPT, h->vaddr + SA5_DOORBELL);
8295         }
8296         pci_disable_device(h->pdev);
8297         fail_all_outstanding_cmds(h);
8298 }
8299
8300 static int detect_controller_lockup(struct ctlr_info *h)
8301 {
8302         u64 now;
8303         u32 heartbeat;
8304         unsigned long flags;
8305
8306         now = get_jiffies_64();
8307         /* If we've received an interrupt recently, we're ok. */
8308         if (time_after64(h->last_intr_timestamp +
8309                                 (h->heartbeat_sample_interval), now))
8310                 return false;
8311
8312         /*
8313          * If we've already checked the heartbeat recently, we're ok.
8314          * This could happen if someone sends us a signal. We
8315          * otherwise don't care about signals in this thread.
8316          */
8317         if (time_after64(h->last_heartbeat_timestamp +
8318                                 (h->heartbeat_sample_interval), now))
8319                 return false;
8320
8321         /* If heartbeat has not changed since we last looked, we're not ok. */
8322         spin_lock_irqsave(&h->lock, flags);
8323         heartbeat = readl(&h->cfgtable->HeartBeat);
8324         spin_unlock_irqrestore(&h->lock, flags);
8325         if (h->last_heartbeat == heartbeat) {
8326                 controller_lockup_detected(h);
8327                 return true;
8328         }
8329
8330         /* We're ok. */
8331         h->last_heartbeat = heartbeat;
8332         h->last_heartbeat_timestamp = now;
8333         return false;
8334 }
8335
8336 /*
8337  * Set ioaccel status for all ioaccel volumes.
8338  *
8339  * Called from monitor controller worker (hpsa_event_monitor_worker)
8340  *
8341  * A Volume (or Volumes that comprise an Array set) may be undergoing a
8342  * transformation, so we will be turning off ioaccel for all volumes that
8343  * make up the Array.
8344  */
8345 static void hpsa_set_ioaccel_status(struct ctlr_info *h)
8346 {
8347         int rc;
8348         int i;
8349         u8 ioaccel_status;
8350         unsigned char *buf;
8351         struct hpsa_scsi_dev_t *device;
8352
8353         if (!h)
8354                 return;
8355
8356         buf = kmalloc(64, GFP_KERNEL);
8357         if (!buf)
8358                 return;
8359
8360         /*
8361          * Run through current device list used during I/O requests.
8362          */
8363         for (i = 0; i < h->ndevices; i++) {
8364                 int offload_to_be_enabled = 0;
8365                 int offload_config = 0;
8366
8367                 device = h->dev[i];
8368
8369                 if (!device)
8370                         continue;
8371                 if (!hpsa_vpd_page_supported(h, device->scsi3addr,
8372                                                 HPSA_VPD_LV_IOACCEL_STATUS))
8373                         continue;
8374
8375                 memset(buf, 0, 64);
8376
8377                 rc = hpsa_scsi_do_inquiry(h, device->scsi3addr,
8378                                         VPD_PAGE | HPSA_VPD_LV_IOACCEL_STATUS,
8379                                         buf, 64);
8380                 if (rc != 0)
8381                         continue;
8382
8383                 ioaccel_status = buf[IOACCEL_STATUS_BYTE];
8384
8385                 /*
8386                  * Check if offload is still configured on
8387                  */
8388                 offload_config =
8389                                 !!(ioaccel_status & OFFLOAD_CONFIGURED_BIT);
8390                 /*
8391                  * If offload is configured on, check to see if ioaccel
8392                  * needs to be enabled.
8393                  */
8394                 if (offload_config)
8395                         offload_to_be_enabled =
8396                                 !!(ioaccel_status & OFFLOAD_ENABLED_BIT);
8397
8398                 /*
8399                  * If ioaccel is to be re-enabled, re-enable later during the
8400                  * scan operation so the driver can get a fresh raidmap
8401                  * before turning ioaccel back on.
8402                  */
8403                 if (offload_to_be_enabled)
8404                         continue;
8405
8406                 /*
8407                  * Immediately turn off ioaccel for any volume the
8408                  * controller tells us to. Some of the reasons could be:
8409                  *    transformation - change to the LVs of an Array.
8410                  *    degraded volume - component failure
8411                  */
8412                 hpsa_turn_off_ioaccel_for_device(device);
8413         }
8414
8415         kfree(buf);
8416 }
8417
8418 static void hpsa_ack_ctlr_events(struct ctlr_info *h)
8419 {
8420         char *event_type;
8421
8422         if (!(h->fw_support & MISC_FW_EVENT_NOTIFY))
8423                 return;
8424
8425         /* Ask the controller to clear the events we're handling. */
8426         if ((h->transMethod & (CFGTBL_Trans_io_accel1
8427                         | CFGTBL_Trans_io_accel2)) &&
8428                 (h->events & HPSA_EVENT_NOTIFY_ACCEL_IO_PATH_STATE_CHANGE ||
8429                  h->events & HPSA_EVENT_NOTIFY_ACCEL_IO_PATH_CONFIG_CHANGE)) {
8430
8431                 if (h->events & HPSA_EVENT_NOTIFY_ACCEL_IO_PATH_STATE_CHANGE)
8432                         event_type = "state change";
8433                 if (h->events & HPSA_EVENT_NOTIFY_ACCEL_IO_PATH_CONFIG_CHANGE)
8434                         event_type = "configuration change";
8435                 /* Stop sending new RAID offload reqs via the IO accelerator */
8436                 scsi_block_requests(h->scsi_host);
8437                 hpsa_set_ioaccel_status(h);
8438                 hpsa_drain_accel_commands(h);
8439                 /* Set 'accelerator path config change' bit */
8440                 dev_warn(&h->pdev->dev,
8441                         "Acknowledging event: 0x%08x (HP SSD Smart Path %s)\n",
8442                         h->events, event_type);
8443                 writel(h->events, &(h->cfgtable->clear_event_notify));
8444                 /* Set the "clear event notify field update" bit 6 */
8445                 writel(DOORBELL_CLEAR_EVENTS, h->vaddr + SA5_DOORBELL);
8446                 /* Wait until ctlr clears 'clear event notify field', bit 6 */
8447                 hpsa_wait_for_clear_event_notify_ack(h);
8448                 scsi_unblock_requests(h->scsi_host);
8449         } else {
8450                 /* Acknowledge controller notification events. */
8451                 writel(h->events, &(h->cfgtable->clear_event_notify));
8452                 writel(DOORBELL_CLEAR_EVENTS, h->vaddr + SA5_DOORBELL);
8453                 hpsa_wait_for_clear_event_notify_ack(h);
8454         }
8455         return;
8456 }
8457
8458 /* Check a register on the controller to see if there are configuration
8459  * changes (added/changed/removed logical drives, etc.) which mean that
8460  * we should rescan the controller for devices.
8461  * Also check flag for driver-initiated rescan.
8462  */
8463 static int hpsa_ctlr_needs_rescan(struct ctlr_info *h)
8464 {
8465         if (h->drv_req_rescan) {
8466                 h->drv_req_rescan = 0;
8467                 return 1;
8468         }
8469
8470         if (!(h->fw_support & MISC_FW_EVENT_NOTIFY))
8471                 return 0;
8472
8473         h->events = readl(&(h->cfgtable->event_notify));
8474         return h->events & RESCAN_REQUIRED_EVENT_BITS;
8475 }
8476
8477 /*
8478  * Check if any of the offline devices have become ready
8479  */
8480 static int hpsa_offline_devices_ready(struct ctlr_info *h)
8481 {
8482         unsigned long flags;
8483         struct offline_device_entry *d;
8484         struct list_head *this, *tmp;
8485
8486         spin_lock_irqsave(&h->offline_device_lock, flags);
8487         list_for_each_safe(this, tmp, &h->offline_device_list) {
8488                 d = list_entry(this, struct offline_device_entry,
8489                                 offline_list);
8490                 spin_unlock_irqrestore(&h->offline_device_lock, flags);
8491                 if (!hpsa_volume_offline(h, d->scsi3addr)) {
8492                         spin_lock_irqsave(&h->offline_device_lock, flags);
8493                         list_del(&d->offline_list);
8494                         spin_unlock_irqrestore(&h->offline_device_lock, flags);
8495                         return 1;
8496                 }
8497                 spin_lock_irqsave(&h->offline_device_lock, flags);
8498         }
8499         spin_unlock_irqrestore(&h->offline_device_lock, flags);
8500         return 0;
8501 }
8502
8503 static int hpsa_luns_changed(struct ctlr_info *h)
8504 {
8505         int rc = 1; /* assume there are changes */
8506         struct ReportLUNdata *logdev = NULL;
8507
8508         /* if we can't find out if lun data has changed,
8509          * assume that it has.
8510          */
8511
8512         if (!h->lastlogicals)
8513                 return rc;
8514
8515         logdev = kzalloc(sizeof(*logdev), GFP_KERNEL);
8516         if (!logdev)
8517                 return rc;
8518
8519         if (hpsa_scsi_do_report_luns(h, 1, logdev, sizeof(*logdev), 0)) {
8520                 dev_warn(&h->pdev->dev,
8521                         "report luns failed, can't track lun changes.\n");
8522                 goto out;
8523         }
8524         if (memcmp(logdev, h->lastlogicals, sizeof(*logdev))) {
8525                 dev_info(&h->pdev->dev,
8526                         "Lun changes detected.\n");
8527                 memcpy(h->lastlogicals, logdev, sizeof(*logdev));
8528                 goto out;
8529         } else
8530                 rc = 0; /* no changes detected. */
8531 out:
8532         kfree(logdev);
8533         return rc;
8534 }
8535
8536 static void hpsa_perform_rescan(struct ctlr_info *h)
8537 {
8538         struct Scsi_Host *sh = NULL;
8539         unsigned long flags;
8540
8541         /*
8542          * Do the scan after the reset
8543          */
8544         spin_lock_irqsave(&h->reset_lock, flags);
8545         if (h->reset_in_progress) {
8546                 h->drv_req_rescan = 1;
8547                 spin_unlock_irqrestore(&h->reset_lock, flags);
8548                 return;
8549         }
8550         spin_unlock_irqrestore(&h->reset_lock, flags);
8551
8552         sh = scsi_host_get(h->scsi_host);
8553         if (sh != NULL) {
8554                 hpsa_scan_start(sh);
8555                 scsi_host_put(sh);
8556                 h->drv_req_rescan = 0;
8557         }
8558 }
8559
8560 /*
8561  * watch for controller events
8562  */
8563 static void hpsa_event_monitor_worker(struct work_struct *work)
8564 {
8565         struct ctlr_info *h = container_of(to_delayed_work(work),
8566                                         struct ctlr_info, event_monitor_work);
8567         unsigned long flags;
8568
8569         spin_lock_irqsave(&h->lock, flags);
8570         if (h->remove_in_progress) {
8571                 spin_unlock_irqrestore(&h->lock, flags);
8572                 return;
8573         }
8574         spin_unlock_irqrestore(&h->lock, flags);
8575
8576         if (hpsa_ctlr_needs_rescan(h)) {
8577                 hpsa_ack_ctlr_events(h);
8578                 hpsa_perform_rescan(h);
8579         }
8580
8581         spin_lock_irqsave(&h->lock, flags);
8582         if (!h->remove_in_progress)
8583                 queue_delayed_work(h->monitor_ctlr_wq, &h->event_monitor_work,
8584                                 HPSA_EVENT_MONITOR_INTERVAL);
8585         spin_unlock_irqrestore(&h->lock, flags);
8586 }
8587
8588 static void hpsa_rescan_ctlr_worker(struct work_struct *work)
8589 {
8590         unsigned long flags;
8591         struct ctlr_info *h = container_of(to_delayed_work(work),
8592                                         struct ctlr_info, rescan_ctlr_work);
8593
8594         spin_lock_irqsave(&h->lock, flags);
8595         if (h->remove_in_progress) {
8596                 spin_unlock_irqrestore(&h->lock, flags);
8597                 return;
8598         }
8599         spin_unlock_irqrestore(&h->lock, flags);
8600
8601         if (h->drv_req_rescan || hpsa_offline_devices_ready(h)) {
8602                 hpsa_perform_rescan(h);
8603         } else if (h->discovery_polling) {
8604                 if (hpsa_luns_changed(h)) {
8605                         dev_info(&h->pdev->dev,
8606                                 "driver discovery polling rescan.\n");
8607                         hpsa_perform_rescan(h);
8608                 }
8609         }
8610         spin_lock_irqsave(&h->lock, flags);
8611         if (!h->remove_in_progress)
8612                 queue_delayed_work(h->rescan_ctlr_wq, &h->rescan_ctlr_work,
8613                                 h->heartbeat_sample_interval);
8614         spin_unlock_irqrestore(&h->lock, flags);
8615 }
8616
8617 static void hpsa_monitor_ctlr_worker(struct work_struct *work)
8618 {
8619         unsigned long flags;
8620         struct ctlr_info *h = container_of(to_delayed_work(work),
8621                                         struct ctlr_info, monitor_ctlr_work);
8622
8623         detect_controller_lockup(h);
8624         if (lockup_detected(h))
8625                 return;
8626
8627         spin_lock_irqsave(&h->lock, flags);
8628         if (!h->remove_in_progress)
8629                 queue_delayed_work(h->monitor_ctlr_wq, &h->monitor_ctlr_work,
8630                                 h->heartbeat_sample_interval);
8631         spin_unlock_irqrestore(&h->lock, flags);
8632 }
8633
8634 static struct workqueue_struct *hpsa_create_controller_wq(struct ctlr_info *h,
8635                                                 char *name)
8636 {
8637         struct workqueue_struct *wq = NULL;
8638
8639         wq = alloc_ordered_workqueue("%s_%d_hpsa", 0, name, h->ctlr);
8640         if (!wq)
8641                 dev_err(&h->pdev->dev, "failed to create %s workqueue\n", name);
8642
8643         return wq;
8644 }
8645
8646 static void hpda_free_ctlr_info(struct ctlr_info *h)
8647 {
8648         kfree(h->reply_map);
8649         kfree(h);
8650 }
8651
8652 static struct ctlr_info *hpda_alloc_ctlr_info(void)
8653 {
8654         struct ctlr_info *h;
8655
8656         h = kzalloc(sizeof(*h), GFP_KERNEL);
8657         if (!h)
8658                 return NULL;
8659
8660         h->reply_map = kcalloc(nr_cpu_ids, sizeof(*h->reply_map), GFP_KERNEL);
8661         if (!h->reply_map) {
8662                 kfree(h);
8663                 return NULL;
8664         }
8665         return h;
8666 }
8667
8668 static int hpsa_init_one(struct pci_dev *pdev, const struct pci_device_id *ent)
8669 {
8670         int rc;
8671         struct ctlr_info *h;
8672         int try_soft_reset = 0;
8673         unsigned long flags;
8674         u32 board_id;
8675
8676         if (number_of_controllers == 0)
8677                 printk(KERN_INFO DRIVER_NAME "\n");
8678
8679         rc = hpsa_lookup_board_id(pdev, &board_id, NULL);
8680         if (rc < 0) {
8681                 dev_warn(&pdev->dev, "Board ID not found\n");
8682                 return rc;
8683         }
8684
8685         rc = hpsa_init_reset_devices(pdev, board_id);
8686         if (rc) {
8687                 if (rc != -ENOTSUPP)
8688                         return rc;
8689                 /* If the reset fails in a particular way (it has no way to do
8690                  * a proper hard reset, so returns -ENOTSUPP) we can try to do
8691                  * a soft reset once we get the controller configured up to the
8692                  * point that it can accept a command.
8693                  */
8694                 try_soft_reset = 1;
8695                 rc = 0;
8696         }
8697
8698 reinit_after_soft_reset:
8699
8700         /* Command structures must be aligned on a 32-byte boundary because
8701          * the 5 lower bits of the address are used by the hardware. and by
8702          * the driver.  See comments in hpsa.h for more info.
8703          */
8704         BUILD_BUG_ON(sizeof(struct CommandList) % COMMANDLIST_ALIGNMENT);
8705         h = hpda_alloc_ctlr_info();
8706         if (!h) {
8707                 dev_err(&pdev->dev, "Failed to allocate controller head\n");
8708                 return -ENOMEM;
8709         }
8710
8711         h->pdev = pdev;
8712
8713         h->intr_mode = hpsa_simple_mode ? SIMPLE_MODE_INT : PERF_MODE_INT;
8714         INIT_LIST_HEAD(&h->offline_device_list);
8715         spin_lock_init(&h->lock);
8716         spin_lock_init(&h->offline_device_lock);
8717         spin_lock_init(&h->scan_lock);
8718         spin_lock_init(&h->reset_lock);
8719         atomic_set(&h->passthru_cmds_avail, HPSA_MAX_CONCURRENT_PASSTHRUS);
8720
8721         /* Allocate and clear per-cpu variable lockup_detected */
8722         h->lockup_detected = alloc_percpu(u32);
8723         if (!h->lockup_detected) {
8724                 dev_err(&h->pdev->dev, "Failed to allocate lockup detector\n");
8725                 rc = -ENOMEM;
8726                 goto clean1;    /* aer/h */
8727         }
8728         set_lockup_detected_for_all_cpus(h, 0);
8729
8730         rc = hpsa_pci_init(h);
8731         if (rc)
8732                 goto clean2;    /* lu, aer/h */
8733
8734         /* relies on h-> settings made by hpsa_pci_init, including
8735          * interrupt_mode h->intr */
8736         rc = hpsa_scsi_host_alloc(h);
8737         if (rc)
8738                 goto clean2_5;  /* pci, lu, aer/h */
8739
8740         sprintf(h->devname, HPSA "%d", h->scsi_host->host_no);
8741         h->ctlr = number_of_controllers;
8742         number_of_controllers++;
8743
8744         /* configure PCI DMA stuff */
8745         rc = dma_set_mask(&pdev->dev, DMA_BIT_MASK(64));
8746         if (rc != 0) {
8747                 rc = dma_set_mask(&pdev->dev, DMA_BIT_MASK(32));
8748                 if (rc != 0) {
8749                         dev_err(&pdev->dev, "no suitable DMA available\n");
8750                         goto clean3;    /* shost, pci, lu, aer/h */
8751                 }
8752         }
8753
8754         /* make sure the board interrupts are off */
8755         h->access.set_intr_mask(h, HPSA_INTR_OFF);
8756
8757         rc = hpsa_request_irqs(h, do_hpsa_intr_msi, do_hpsa_intr_intx);
8758         if (rc)
8759                 goto clean3;    /* shost, pci, lu, aer/h */
8760         rc = hpsa_alloc_cmd_pool(h);
8761         if (rc)
8762                 goto clean4;    /* irq, shost, pci, lu, aer/h */
8763         rc = hpsa_alloc_sg_chain_blocks(h);
8764         if (rc)
8765                 goto clean5;    /* cmd, irq, shost, pci, lu, aer/h */
8766         init_waitqueue_head(&h->scan_wait_queue);
8767         init_waitqueue_head(&h->event_sync_wait_queue);
8768         mutex_init(&h->reset_mutex);
8769         h->scan_finished = 1; /* no scan currently in progress */
8770         h->scan_waiting = 0;
8771
8772         pci_set_drvdata(pdev, h);
8773         h->ndevices = 0;
8774
8775         spin_lock_init(&h->devlock);
8776         rc = hpsa_put_ctlr_into_performant_mode(h);
8777         if (rc)
8778                 goto clean6; /* sg, cmd, irq, shost, pci, lu, aer/h */
8779
8780         /* create the resubmit workqueue */
8781         h->rescan_ctlr_wq = hpsa_create_controller_wq(h, "rescan");
8782         if (!h->rescan_ctlr_wq) {
8783                 rc = -ENOMEM;
8784                 goto clean7;
8785         }
8786
8787         h->resubmit_wq = hpsa_create_controller_wq(h, "resubmit");
8788         if (!h->resubmit_wq) {
8789                 rc = -ENOMEM;
8790                 goto clean7;    /* aer/h */
8791         }
8792
8793         h->monitor_ctlr_wq = hpsa_create_controller_wq(h, "monitor");
8794         if (!h->monitor_ctlr_wq) {
8795                 rc = -ENOMEM;
8796                 goto clean7;
8797         }
8798
8799         /*
8800          * At this point, the controller is ready to take commands.
8801          * Now, if reset_devices and the hard reset didn't work, try
8802          * the soft reset and see if that works.
8803          */
8804         if (try_soft_reset) {
8805
8806                 /* This is kind of gross.  We may or may not get a completion
8807                  * from the soft reset command, and if we do, then the value
8808                  * from the fifo may or may not be valid.  So, we wait 10 secs
8809                  * after the reset throwing away any completions we get during
8810                  * that time.  Unregister the interrupt handler and register
8811                  * fake ones to scoop up any residual completions.
8812                  */
8813                 spin_lock_irqsave(&h->lock, flags);
8814                 h->access.set_intr_mask(h, HPSA_INTR_OFF);
8815                 spin_unlock_irqrestore(&h->lock, flags);
8816                 hpsa_free_irqs(h);
8817                 rc = hpsa_request_irqs(h, hpsa_msix_discard_completions,
8818                                         hpsa_intx_discard_completions);
8819                 if (rc) {
8820                         dev_warn(&h->pdev->dev,
8821                                 "Failed to request_irq after soft reset.\n");
8822                         /*
8823                          * cannot goto clean7 or free_irqs will be called
8824                          * again. Instead, do its work
8825                          */
8826                         hpsa_free_performant_mode(h);   /* clean7 */
8827                         hpsa_free_sg_chain_blocks(h);   /* clean6 */
8828                         hpsa_free_cmd_pool(h);          /* clean5 */
8829                         /*
8830                          * skip hpsa_free_irqs(h) clean4 since that
8831                          * was just called before request_irqs failed
8832                          */
8833                         goto clean3;
8834                 }
8835
8836                 rc = hpsa_kdump_soft_reset(h);
8837                 if (rc)
8838                         /* Neither hard nor soft reset worked, we're hosed. */
8839                         goto clean7;
8840
8841                 dev_info(&h->pdev->dev, "Board READY.\n");
8842                 dev_info(&h->pdev->dev,
8843                         "Waiting for stale completions to drain.\n");
8844                 h->access.set_intr_mask(h, HPSA_INTR_ON);
8845                 msleep(10000);
8846                 h->access.set_intr_mask(h, HPSA_INTR_OFF);
8847
8848                 rc = controller_reset_failed(h->cfgtable);
8849                 if (rc)
8850                         dev_info(&h->pdev->dev,
8851                                 "Soft reset appears to have failed.\n");
8852
8853                 /* since the controller's reset, we have to go back and re-init
8854                  * everything.  Easiest to just forget what we've done and do it
8855                  * all over again.
8856                  */
8857                 hpsa_undo_allocations_after_kdump_soft_reset(h);
8858                 try_soft_reset = 0;
8859                 if (rc)
8860                         /* don't goto clean, we already unallocated */
8861                         return -ENODEV;
8862
8863                 goto reinit_after_soft_reset;
8864         }
8865
8866         /* Enable Accelerated IO path at driver layer */
8867         h->acciopath_status = 1;
8868         /* Disable discovery polling.*/
8869         h->discovery_polling = 0;
8870
8871
8872         /* Turn the interrupts on so we can service requests */
8873         h->access.set_intr_mask(h, HPSA_INTR_ON);
8874
8875         hpsa_hba_inquiry(h);
8876
8877         h->lastlogicals = kzalloc(sizeof(*(h->lastlogicals)), GFP_KERNEL);
8878         if (!h->lastlogicals)
8879                 dev_info(&h->pdev->dev,
8880                         "Can't track change to report lun data\n");
8881
8882         /* hook into SCSI subsystem */
8883         rc = hpsa_scsi_add_host(h);
8884         if (rc)
8885                 goto clean8; /* lastlogicals, perf, sg, cmd, irq, shost, pci, lu, aer/h */
8886
8887         /* Monitor the controller for firmware lockups */
8888         h->heartbeat_sample_interval = HEARTBEAT_SAMPLE_INTERVAL;
8889         INIT_DELAYED_WORK(&h->monitor_ctlr_work, hpsa_monitor_ctlr_worker);
8890         schedule_delayed_work(&h->monitor_ctlr_work,
8891                                 h->heartbeat_sample_interval);
8892         INIT_DELAYED_WORK(&h->rescan_ctlr_work, hpsa_rescan_ctlr_worker);
8893         queue_delayed_work(h->rescan_ctlr_wq, &h->rescan_ctlr_work,
8894                                 h->heartbeat_sample_interval);
8895         INIT_DELAYED_WORK(&h->event_monitor_work, hpsa_event_monitor_worker);
8896         schedule_delayed_work(&h->event_monitor_work,
8897                                 HPSA_EVENT_MONITOR_INTERVAL);
8898         return 0;
8899
8900 clean8: /* lastlogicals, perf, sg, cmd, irq, shost, pci, lu, aer/h */
8901         kfree(h->lastlogicals);
8902 clean7: /* perf, sg, cmd, irq, shost, pci, lu, aer/h */
8903         hpsa_free_performant_mode(h);
8904         h->access.set_intr_mask(h, HPSA_INTR_OFF);
8905 clean6: /* sg, cmd, irq, pci, lockup, wq/aer/h */
8906         hpsa_free_sg_chain_blocks(h);
8907 clean5: /* cmd, irq, shost, pci, lu, aer/h */
8908         hpsa_free_cmd_pool(h);
8909 clean4: /* irq, shost, pci, lu, aer/h */
8910         hpsa_free_irqs(h);
8911 clean3: /* shost, pci, lu, aer/h */
8912         scsi_host_put(h->scsi_host);
8913         h->scsi_host = NULL;
8914 clean2_5: /* pci, lu, aer/h */
8915         hpsa_free_pci_init(h);
8916 clean2: /* lu, aer/h */
8917         if (h->lockup_detected) {
8918                 free_percpu(h->lockup_detected);
8919                 h->lockup_detected = NULL;
8920         }
8921 clean1: /* wq/aer/h */
8922         if (h->resubmit_wq) {
8923                 destroy_workqueue(h->resubmit_wq);
8924                 h->resubmit_wq = NULL;
8925         }
8926         if (h->rescan_ctlr_wq) {
8927                 destroy_workqueue(h->rescan_ctlr_wq);
8928                 h->rescan_ctlr_wq = NULL;
8929         }
8930         if (h->monitor_ctlr_wq) {
8931                 destroy_workqueue(h->monitor_ctlr_wq);
8932                 h->monitor_ctlr_wq = NULL;
8933         }
8934         kfree(h);
8935         return rc;
8936 }
8937
8938 static void hpsa_flush_cache(struct ctlr_info *h)
8939 {
8940         char *flush_buf;
8941         struct CommandList *c;
8942         int rc;
8943
8944         if (unlikely(lockup_detected(h)))
8945                 return;
8946         flush_buf = kzalloc(4, GFP_KERNEL);
8947         if (!flush_buf)
8948                 return;
8949
8950         c = cmd_alloc(h);
8951
8952         if (fill_cmd(c, HPSA_CACHE_FLUSH, h, flush_buf, 4, 0,
8953                 RAID_CTLR_LUNID, TYPE_CMD)) {
8954                 goto out;
8955         }
8956         rc = hpsa_scsi_do_simple_cmd_with_retry(h, c, DMA_TO_DEVICE,
8957                         DEFAULT_TIMEOUT);
8958         if (rc)
8959                 goto out;
8960         if (c->err_info->CommandStatus != 0)
8961 out:
8962                 dev_warn(&h->pdev->dev,
8963                         "error flushing cache on controller\n");
8964         cmd_free(h, c);
8965         kfree(flush_buf);
8966 }
8967
8968 /* Make controller gather fresh report lun data each time we
8969  * send down a report luns request
8970  */
8971 static void hpsa_disable_rld_caching(struct ctlr_info *h)
8972 {
8973         u32 *options;
8974         struct CommandList *c;
8975         int rc;
8976
8977         /* Don't bother trying to set diag options if locked up */
8978         if (unlikely(h->lockup_detected))
8979                 return;
8980
8981         options = kzalloc(sizeof(*options), GFP_KERNEL);
8982         if (!options)
8983                 return;
8984
8985         c = cmd_alloc(h);
8986
8987         /* first, get the current diag options settings */
8988         if (fill_cmd(c, BMIC_SENSE_DIAG_OPTIONS, h, options, 4, 0,
8989                 RAID_CTLR_LUNID, TYPE_CMD))
8990                 goto errout;
8991
8992         rc = hpsa_scsi_do_simple_cmd_with_retry(h, c, DMA_FROM_DEVICE,
8993                         NO_TIMEOUT);
8994         if ((rc != 0) || (c->err_info->CommandStatus != 0))
8995                 goto errout;
8996
8997         /* Now, set the bit for disabling the RLD caching */
8998         *options |= HPSA_DIAG_OPTS_DISABLE_RLD_CACHING;
8999
9000         if (fill_cmd(c, BMIC_SET_DIAG_OPTIONS, h, options, 4, 0,
9001                 RAID_CTLR_LUNID, TYPE_CMD))
9002                 goto errout;
9003
9004         rc = hpsa_scsi_do_simple_cmd_with_retry(h, c, DMA_TO_DEVICE,
9005                         NO_TIMEOUT);
9006         if ((rc != 0)  || (c->err_info->CommandStatus != 0))
9007                 goto errout;
9008
9009         /* Now verify that it got set: */
9010         if (fill_cmd(c, BMIC_SENSE_DIAG_OPTIONS, h, options, 4, 0,
9011                 RAID_CTLR_LUNID, TYPE_CMD))
9012                 goto errout;
9013
9014         rc = hpsa_scsi_do_simple_cmd_with_retry(h, c, DMA_FROM_DEVICE,
9015                         NO_TIMEOUT);
9016         if ((rc != 0)  || (c->err_info->CommandStatus != 0))
9017                 goto errout;
9018
9019         if (*options & HPSA_DIAG_OPTS_DISABLE_RLD_CACHING)
9020                 goto out;
9021
9022 errout:
9023         dev_err(&h->pdev->dev,
9024                         "Error: failed to disable report lun data caching.\n");
9025 out:
9026         cmd_free(h, c);
9027         kfree(options);
9028 }
9029
9030 static void __hpsa_shutdown(struct pci_dev *pdev)
9031 {
9032         struct ctlr_info *h;
9033
9034         h = pci_get_drvdata(pdev);
9035         /* Turn board interrupts off  and send the flush cache command
9036          * sendcmd will turn off interrupt, and send the flush...
9037          * To write all data in the battery backed cache to disks
9038          */
9039         hpsa_flush_cache(h);
9040         h->access.set_intr_mask(h, HPSA_INTR_OFF);
9041         hpsa_free_irqs(h);                      /* init_one 4 */
9042         hpsa_disable_interrupt_mode(h);         /* pci_init 2 */
9043 }
9044
9045 static void hpsa_shutdown(struct pci_dev *pdev)
9046 {
9047         __hpsa_shutdown(pdev);
9048         pci_disable_device(pdev);
9049 }
9050
9051 static void hpsa_free_device_info(struct ctlr_info *h)
9052 {
9053         int i;
9054
9055         for (i = 0; i < h->ndevices; i++) {
9056                 kfree(h->dev[i]);
9057                 h->dev[i] = NULL;
9058         }
9059 }
9060
9061 static void hpsa_remove_one(struct pci_dev *pdev)
9062 {
9063         struct ctlr_info *h;
9064         unsigned long flags;
9065
9066         if (pci_get_drvdata(pdev) == NULL) {
9067                 dev_err(&pdev->dev, "unable to remove device\n");
9068                 return;
9069         }
9070         h = pci_get_drvdata(pdev);
9071
9072         /* Get rid of any controller monitoring work items */
9073         spin_lock_irqsave(&h->lock, flags);
9074         h->remove_in_progress = 1;
9075         spin_unlock_irqrestore(&h->lock, flags);
9076         cancel_delayed_work_sync(&h->monitor_ctlr_work);
9077         cancel_delayed_work_sync(&h->rescan_ctlr_work);
9078         cancel_delayed_work_sync(&h->event_monitor_work);
9079         destroy_workqueue(h->rescan_ctlr_wq);
9080         destroy_workqueue(h->resubmit_wq);
9081         destroy_workqueue(h->monitor_ctlr_wq);
9082
9083         hpsa_delete_sas_host(h);
9084
9085         /*
9086          * Call before disabling interrupts.
9087          * scsi_remove_host can trigger I/O operations especially
9088          * when multipath is enabled. There can be SYNCHRONIZE CACHE
9089          * operations which cannot complete and will hang the system.
9090          */
9091         if (h->scsi_host)
9092                 scsi_remove_host(h->scsi_host);         /* init_one 8 */
9093         /* includes hpsa_free_irqs - init_one 4 */
9094         /* includes hpsa_disable_interrupt_mode - pci_init 2 */
9095         __hpsa_shutdown(pdev);
9096
9097         hpsa_free_device_info(h);               /* scan */
9098
9099         kfree(h->hba_inquiry_data);                     /* init_one 10 */
9100         h->hba_inquiry_data = NULL;                     /* init_one 10 */
9101         hpsa_free_ioaccel2_sg_chain_blocks(h);
9102         hpsa_free_performant_mode(h);                   /* init_one 7 */
9103         hpsa_free_sg_chain_blocks(h);                   /* init_one 6 */
9104         hpsa_free_cmd_pool(h);                          /* init_one 5 */
9105         kfree(h->lastlogicals);
9106
9107         /* hpsa_free_irqs already called via hpsa_shutdown init_one 4 */
9108
9109         scsi_host_put(h->scsi_host);                    /* init_one 3 */
9110         h->scsi_host = NULL;                            /* init_one 3 */
9111
9112         /* includes hpsa_disable_interrupt_mode - pci_init 2 */
9113         hpsa_free_pci_init(h);                          /* init_one 2.5 */
9114
9115         free_percpu(h->lockup_detected);                /* init_one 2 */
9116         h->lockup_detected = NULL;                      /* init_one 2 */
9117         /* (void) pci_disable_pcie_error_reporting(pdev); */    /* init_one 1 */
9118
9119         hpda_free_ctlr_info(h);                         /* init_one 1 */
9120 }
9121
9122 static int __maybe_unused hpsa_suspend(
9123         __attribute__((unused)) struct device *dev)
9124 {
9125         return -ENOSYS;
9126 }
9127
9128 static int __maybe_unused hpsa_resume
9129         (__attribute__((unused)) struct device *dev)
9130 {
9131         return -ENOSYS;
9132 }
9133
9134 static SIMPLE_DEV_PM_OPS(hpsa_pm_ops, hpsa_suspend, hpsa_resume);
9135
9136 static struct pci_driver hpsa_pci_driver = {
9137         .name = HPSA,
9138         .probe = hpsa_init_one,
9139         .remove = hpsa_remove_one,
9140         .id_table = hpsa_pci_device_id, /* id_table */
9141         .shutdown = hpsa_shutdown,
9142         .driver.pm = &hpsa_pm_ops,
9143 };
9144
9145 /* Fill in bucket_map[], given nsgs (the max number of
9146  * scatter gather elements supported) and bucket[],
9147  * which is an array of 8 integers.  The bucket[] array
9148  * contains 8 different DMA transfer sizes (in 16
9149  * byte increments) which the controller uses to fetch
9150  * commands.  This function fills in bucket_map[], which
9151  * maps a given number of scatter gather elements to one of
9152  * the 8 DMA transfer sizes.  The point of it is to allow the
9153  * controller to only do as much DMA as needed to fetch the
9154  * command, with the DMA transfer size encoded in the lower
9155  * bits of the command address.
9156  */
9157 static void  calc_bucket_map(int bucket[], int num_buckets,
9158         int nsgs, int min_blocks, u32 *bucket_map)
9159 {
9160         int i, j, b, size;
9161
9162         /* Note, bucket_map must have nsgs+1 entries. */
9163         for (i = 0; i <= nsgs; i++) {
9164                 /* Compute size of a command with i SG entries */
9165                 size = i + min_blocks;
9166                 b = num_buckets; /* Assume the biggest bucket */
9167                 /* Find the bucket that is just big enough */
9168                 for (j = 0; j < num_buckets; j++) {
9169                         if (bucket[j] >= size) {
9170                                 b = j;
9171                                 break;
9172                         }
9173                 }
9174                 /* for a command with i SG entries, use bucket b. */
9175                 bucket_map[i] = b;
9176         }
9177 }
9178
9179 /*
9180  * return -ENODEV on err, 0 on success (or no action)
9181  * allocates numerous items that must be freed later
9182  */
9183 static int hpsa_enter_performant_mode(struct ctlr_info *h, u32 trans_support)
9184 {
9185         int i;
9186         unsigned long register_value;
9187         unsigned long transMethod = CFGTBL_Trans_Performant |
9188                         (trans_support & CFGTBL_Trans_use_short_tags) |
9189                                 CFGTBL_Trans_enable_directed_msix |
9190                         (trans_support & (CFGTBL_Trans_io_accel1 |
9191                                 CFGTBL_Trans_io_accel2));
9192         struct access_method access = SA5_performant_access;
9193
9194         /* This is a bit complicated.  There are 8 registers on
9195          * the controller which we write to to tell it 8 different
9196          * sizes of commands which there may be.  It's a way of
9197          * reducing the DMA done to fetch each command.  Encoded into
9198          * each command's tag are 3 bits which communicate to the controller
9199          * which of the eight sizes that command fits within.  The size of
9200          * each command depends on how many scatter gather entries there are.
9201          * Each SG entry requires 16 bytes.  The eight registers are programmed
9202          * with the number of 16-byte blocks a command of that size requires.
9203          * The smallest command possible requires 5 such 16 byte blocks.
9204          * the largest command possible requires SG_ENTRIES_IN_CMD + 4 16-byte
9205          * blocks.  Note, this only extends to the SG entries contained
9206          * within the command block, and does not extend to chained blocks
9207          * of SG elements.   bft[] contains the eight values we write to
9208          * the registers.  They are not evenly distributed, but have more
9209          * sizes for small commands, and fewer sizes for larger commands.
9210          */
9211         int bft[8] = {5, 6, 8, 10, 12, 20, 28, SG_ENTRIES_IN_CMD + 4};
9212 #define MIN_IOACCEL2_BFT_ENTRY 5
9213 #define HPSA_IOACCEL2_HEADER_SZ 4
9214         int bft2[16] = {MIN_IOACCEL2_BFT_ENTRY, 6, 7, 8, 9, 10, 11, 12,
9215                         13, 14, 15, 16, 17, 18, 19,
9216                         HPSA_IOACCEL2_HEADER_SZ + IOACCEL2_MAXSGENTRIES};
9217         BUILD_BUG_ON(ARRAY_SIZE(bft2) != 16);
9218         BUILD_BUG_ON(ARRAY_SIZE(bft) != 8);
9219         BUILD_BUG_ON(offsetof(struct io_accel2_cmd, sg) >
9220                                  16 * MIN_IOACCEL2_BFT_ENTRY);
9221         BUILD_BUG_ON(sizeof(struct ioaccel2_sg_element) != 16);
9222         BUILD_BUG_ON(28 > SG_ENTRIES_IN_CMD + 4);
9223         /*  5 = 1 s/g entry or 4k
9224          *  6 = 2 s/g entry or 8k
9225          *  8 = 4 s/g entry or 16k
9226          * 10 = 6 s/g entry or 24k
9227          */
9228
9229         /* If the controller supports either ioaccel method then
9230          * we can also use the RAID stack submit path that does not
9231          * perform the superfluous readl() after each command submission.
9232          */
9233         if (trans_support & (CFGTBL_Trans_io_accel1 | CFGTBL_Trans_io_accel2))
9234                 access = SA5_performant_access_no_read;
9235
9236         /* Controller spec: zero out this buffer. */
9237         for (i = 0; i < h->nreply_queues; i++)
9238                 memset(h->reply_queue[i].head, 0, h->reply_queue_size);
9239
9240         bft[7] = SG_ENTRIES_IN_CMD + 4;
9241         calc_bucket_map(bft, ARRAY_SIZE(bft),
9242                                 SG_ENTRIES_IN_CMD, 4, h->blockFetchTable);
9243         for (i = 0; i < 8; i++)
9244                 writel(bft[i], &h->transtable->BlockFetch[i]);
9245
9246         /* size of controller ring buffer */
9247         writel(h->max_commands, &h->transtable->RepQSize);
9248         writel(h->nreply_queues, &h->transtable->RepQCount);
9249         writel(0, &h->transtable->RepQCtrAddrLow32);
9250         writel(0, &h->transtable->RepQCtrAddrHigh32);
9251
9252         for (i = 0; i < h->nreply_queues; i++) {
9253                 writel(0, &h->transtable->RepQAddr[i].upper);
9254                 writel(h->reply_queue[i].busaddr,
9255                         &h->transtable->RepQAddr[i].lower);
9256         }
9257
9258         writel(0, &h->cfgtable->HostWrite.command_pool_addr_hi);
9259         writel(transMethod, &(h->cfgtable->HostWrite.TransportRequest));
9260         /*
9261          * enable outbound interrupt coalescing in accelerator mode;
9262          */
9263         if (trans_support & CFGTBL_Trans_io_accel1) {
9264                 access = SA5_ioaccel_mode1_access;
9265                 writel(10, &h->cfgtable->HostWrite.CoalIntDelay);
9266                 writel(4, &h->cfgtable->HostWrite.CoalIntCount);
9267         } else
9268                 if (trans_support & CFGTBL_Trans_io_accel2)
9269                         access = SA5_ioaccel_mode2_access;
9270         writel(CFGTBL_ChangeReq, h->vaddr + SA5_DOORBELL);
9271         if (hpsa_wait_for_mode_change_ack(h)) {
9272                 dev_err(&h->pdev->dev,
9273                         "performant mode problem - doorbell timeout\n");
9274                 return -ENODEV;
9275         }
9276         register_value = readl(&(h->cfgtable->TransportActive));
9277         if (!(register_value & CFGTBL_Trans_Performant)) {
9278                 dev_err(&h->pdev->dev,
9279                         "performant mode problem - transport not active\n");
9280                 return -ENODEV;
9281         }
9282         /* Change the access methods to the performant access methods */
9283         h->access = access;
9284         h->transMethod = transMethod;
9285
9286         if (!((trans_support & CFGTBL_Trans_io_accel1) ||
9287                 (trans_support & CFGTBL_Trans_io_accel2)))
9288                 return 0;
9289
9290         if (trans_support & CFGTBL_Trans_io_accel1) {
9291                 /* Set up I/O accelerator mode */
9292                 for (i = 0; i < h->nreply_queues; i++) {
9293                         writel(i, h->vaddr + IOACCEL_MODE1_REPLY_QUEUE_INDEX);
9294                         h->reply_queue[i].current_entry =
9295                                 readl(h->vaddr + IOACCEL_MODE1_PRODUCER_INDEX);
9296                 }
9297                 bft[7] = h->ioaccel_maxsg + 8;
9298                 calc_bucket_map(bft, ARRAY_SIZE(bft), h->ioaccel_maxsg, 8,
9299                                 h->ioaccel1_blockFetchTable);
9300
9301                 /* initialize all reply queue entries to unused */
9302                 for (i = 0; i < h->nreply_queues; i++)
9303                         memset(h->reply_queue[i].head,
9304                                 (u8) IOACCEL_MODE1_REPLY_UNUSED,
9305                                 h->reply_queue_size);
9306
9307                 /* set all the constant fields in the accelerator command
9308                  * frames once at init time to save CPU cycles later.
9309                  */
9310                 for (i = 0; i < h->nr_cmds; i++) {
9311                         struct io_accel1_cmd *cp = &h->ioaccel_cmd_pool[i];
9312
9313                         cp->function = IOACCEL1_FUNCTION_SCSIIO;
9314                         cp->err_info = (u32) (h->errinfo_pool_dhandle +
9315                                         (i * sizeof(struct ErrorInfo)));
9316                         cp->err_info_len = sizeof(struct ErrorInfo);
9317                         cp->sgl_offset = IOACCEL1_SGLOFFSET;
9318                         cp->host_context_flags =
9319                                 cpu_to_le16(IOACCEL1_HCFLAGS_CISS_FORMAT);
9320                         cp->timeout_sec = 0;
9321                         cp->ReplyQueue = 0;
9322                         cp->tag =
9323                                 cpu_to_le64((i << DIRECT_LOOKUP_SHIFT));
9324                         cp->host_addr =
9325                                 cpu_to_le64(h->ioaccel_cmd_pool_dhandle +
9326                                         (i * sizeof(struct io_accel1_cmd)));
9327                 }
9328         } else if (trans_support & CFGTBL_Trans_io_accel2) {
9329                 u64 cfg_offset, cfg_base_addr_index;
9330                 u32 bft2_offset, cfg_base_addr;
9331
9332                 hpsa_find_cfg_addrs(h->pdev, h->vaddr, &cfg_base_addr,
9333                                     &cfg_base_addr_index, &cfg_offset);
9334                 BUILD_BUG_ON(offsetof(struct io_accel2_cmd, sg) != 64);
9335                 bft2[15] = h->ioaccel_maxsg + HPSA_IOACCEL2_HEADER_SZ;
9336                 calc_bucket_map(bft2, ARRAY_SIZE(bft2), h->ioaccel_maxsg,
9337                                 4, h->ioaccel2_blockFetchTable);
9338                 bft2_offset = readl(&h->cfgtable->io_accel_request_size_offset);
9339                 BUILD_BUG_ON(offsetof(struct CfgTable,
9340                                 io_accel_request_size_offset) != 0xb8);
9341                 h->ioaccel2_bft2_regs =
9342                         remap_pci_mem(pci_resource_start(h->pdev,
9343                                         cfg_base_addr_index) +
9344                                         cfg_offset + bft2_offset,
9345                                         ARRAY_SIZE(bft2) *
9346                                         sizeof(*h->ioaccel2_bft2_regs));
9347                 for (i = 0; i < ARRAY_SIZE(bft2); i++)
9348                         writel(bft2[i], &h->ioaccel2_bft2_regs[i]);
9349         }
9350         writel(CFGTBL_ChangeReq, h->vaddr + SA5_DOORBELL);
9351         if (hpsa_wait_for_mode_change_ack(h)) {
9352                 dev_err(&h->pdev->dev,
9353                         "performant mode problem - enabling ioaccel mode\n");
9354                 return -ENODEV;
9355         }
9356         return 0;
9357 }
9358
9359 /* Free ioaccel1 mode command blocks and block fetch table */
9360 static void hpsa_free_ioaccel1_cmd_and_bft(struct ctlr_info *h)
9361 {
9362         if (h->ioaccel_cmd_pool) {
9363                 dma_free_coherent(&h->pdev->dev,
9364                                   h->nr_cmds * sizeof(*h->ioaccel_cmd_pool),
9365                                   h->ioaccel_cmd_pool,
9366                                   h->ioaccel_cmd_pool_dhandle);
9367                 h->ioaccel_cmd_pool = NULL;
9368                 h->ioaccel_cmd_pool_dhandle = 0;
9369         }
9370         kfree(h->ioaccel1_blockFetchTable);
9371         h->ioaccel1_blockFetchTable = NULL;
9372 }
9373
9374 /* Allocate ioaccel1 mode command blocks and block fetch table */
9375 static int hpsa_alloc_ioaccel1_cmd_and_bft(struct ctlr_info *h)
9376 {
9377         h->ioaccel_maxsg =
9378                 readl(&(h->cfgtable->io_accel_max_embedded_sg_count));
9379         if (h->ioaccel_maxsg > IOACCEL1_MAXSGENTRIES)
9380                 h->ioaccel_maxsg = IOACCEL1_MAXSGENTRIES;
9381
9382         /* Command structures must be aligned on a 128-byte boundary
9383          * because the 7 lower bits of the address are used by the
9384          * hardware.
9385          */
9386         BUILD_BUG_ON(sizeof(struct io_accel1_cmd) %
9387                         IOACCEL1_COMMANDLIST_ALIGNMENT);
9388         h->ioaccel_cmd_pool =
9389                 dma_alloc_coherent(&h->pdev->dev,
9390                         h->nr_cmds * sizeof(*h->ioaccel_cmd_pool),
9391                         &h->ioaccel_cmd_pool_dhandle, GFP_KERNEL);
9392
9393         h->ioaccel1_blockFetchTable =
9394                 kmalloc(((h->ioaccel_maxsg + 1) *
9395                                 sizeof(u32)), GFP_KERNEL);
9396
9397         if ((h->ioaccel_cmd_pool == NULL) ||
9398                 (h->ioaccel1_blockFetchTable == NULL))
9399                 goto clean_up;
9400
9401         memset(h->ioaccel_cmd_pool, 0,
9402                 h->nr_cmds * sizeof(*h->ioaccel_cmd_pool));
9403         return 0;
9404
9405 clean_up:
9406         hpsa_free_ioaccel1_cmd_and_bft(h);
9407         return -ENOMEM;
9408 }
9409
9410 /* Free ioaccel2 mode command blocks and block fetch table */
9411 static void hpsa_free_ioaccel2_cmd_and_bft(struct ctlr_info *h)
9412 {
9413         hpsa_free_ioaccel2_sg_chain_blocks(h);
9414
9415         if (h->ioaccel2_cmd_pool) {
9416                 dma_free_coherent(&h->pdev->dev,
9417                                   h->nr_cmds * sizeof(*h->ioaccel2_cmd_pool),
9418                                   h->ioaccel2_cmd_pool,
9419                                   h->ioaccel2_cmd_pool_dhandle);
9420                 h->ioaccel2_cmd_pool = NULL;
9421                 h->ioaccel2_cmd_pool_dhandle = 0;
9422         }
9423         kfree(h->ioaccel2_blockFetchTable);
9424         h->ioaccel2_blockFetchTable = NULL;
9425 }
9426
9427 /* Allocate ioaccel2 mode command blocks and block fetch table */
9428 static int hpsa_alloc_ioaccel2_cmd_and_bft(struct ctlr_info *h)
9429 {
9430         int rc;
9431
9432         /* Allocate ioaccel2 mode command blocks and block fetch table */
9433
9434         h->ioaccel_maxsg =
9435                 readl(&(h->cfgtable->io_accel_max_embedded_sg_count));
9436         if (h->ioaccel_maxsg > IOACCEL2_MAXSGENTRIES)
9437                 h->ioaccel_maxsg = IOACCEL2_MAXSGENTRIES;
9438
9439         BUILD_BUG_ON(sizeof(struct io_accel2_cmd) %
9440                         IOACCEL2_COMMANDLIST_ALIGNMENT);
9441         h->ioaccel2_cmd_pool =
9442                 dma_alloc_coherent(&h->pdev->dev,
9443                         h->nr_cmds * sizeof(*h->ioaccel2_cmd_pool),
9444                         &h->ioaccel2_cmd_pool_dhandle, GFP_KERNEL);
9445
9446         h->ioaccel2_blockFetchTable =
9447                 kmalloc(((h->ioaccel_maxsg + 1) *
9448                                 sizeof(u32)), GFP_KERNEL);
9449
9450         if ((h->ioaccel2_cmd_pool == NULL) ||
9451                 (h->ioaccel2_blockFetchTable == NULL)) {
9452                 rc = -ENOMEM;
9453                 goto clean_up;
9454         }
9455
9456         rc = hpsa_allocate_ioaccel2_sg_chain_blocks(h);
9457         if (rc)
9458                 goto clean_up;
9459
9460         memset(h->ioaccel2_cmd_pool, 0,
9461                 h->nr_cmds * sizeof(*h->ioaccel2_cmd_pool));
9462         return 0;
9463
9464 clean_up:
9465         hpsa_free_ioaccel2_cmd_and_bft(h);
9466         return rc;
9467 }
9468
9469 /* Free items allocated by hpsa_put_ctlr_into_performant_mode */
9470 static void hpsa_free_performant_mode(struct ctlr_info *h)
9471 {
9472         kfree(h->blockFetchTable);
9473         h->blockFetchTable = NULL;
9474         hpsa_free_reply_queues(h);
9475         hpsa_free_ioaccel1_cmd_and_bft(h);
9476         hpsa_free_ioaccel2_cmd_and_bft(h);
9477 }
9478
9479 /* return -ENODEV on error, 0 on success (or no action)
9480  * allocates numerous items that must be freed later
9481  */
9482 static int hpsa_put_ctlr_into_performant_mode(struct ctlr_info *h)
9483 {
9484         u32 trans_support;
9485         unsigned long transMethod = CFGTBL_Trans_Performant |
9486                                         CFGTBL_Trans_use_short_tags;
9487         int i, rc;
9488
9489         if (hpsa_simple_mode)
9490                 return 0;
9491
9492         trans_support = readl(&(h->cfgtable->TransportSupport));
9493         if (!(trans_support & PERFORMANT_MODE))
9494                 return 0;
9495
9496         /* Check for I/O accelerator mode support */
9497         if (trans_support & CFGTBL_Trans_io_accel1) {
9498                 transMethod |= CFGTBL_Trans_io_accel1 |
9499                                 CFGTBL_Trans_enable_directed_msix;
9500                 rc = hpsa_alloc_ioaccel1_cmd_and_bft(h);
9501                 if (rc)
9502                         return rc;
9503         } else if (trans_support & CFGTBL_Trans_io_accel2) {
9504                 transMethod |= CFGTBL_Trans_io_accel2 |
9505                                 CFGTBL_Trans_enable_directed_msix;
9506                 rc = hpsa_alloc_ioaccel2_cmd_and_bft(h);
9507                 if (rc)
9508                         return rc;
9509         }
9510
9511         h->nreply_queues = h->msix_vectors > 0 ? h->msix_vectors : 1;
9512         hpsa_get_max_perf_mode_cmds(h);
9513         /* Performant mode ring buffer and supporting data structures */
9514         h->reply_queue_size = h->max_commands * sizeof(u64);
9515
9516         for (i = 0; i < h->nreply_queues; i++) {
9517                 h->reply_queue[i].head = dma_alloc_coherent(&h->pdev->dev,
9518                                                 h->reply_queue_size,
9519                                                 &h->reply_queue[i].busaddr,
9520                                                 GFP_KERNEL);
9521                 if (!h->reply_queue[i].head) {
9522                         rc = -ENOMEM;
9523                         goto clean1;    /* rq, ioaccel */
9524                 }
9525                 h->reply_queue[i].size = h->max_commands;
9526                 h->reply_queue[i].wraparound = 1;  /* spec: init to 1 */
9527                 h->reply_queue[i].current_entry = 0;
9528         }
9529
9530         /* Need a block fetch table for performant mode */
9531         h->blockFetchTable = kmalloc(((SG_ENTRIES_IN_CMD + 1) *
9532                                 sizeof(u32)), GFP_KERNEL);
9533         if (!h->blockFetchTable) {
9534                 rc = -ENOMEM;
9535                 goto clean1;    /* rq, ioaccel */
9536         }
9537
9538         rc = hpsa_enter_performant_mode(h, trans_support);
9539         if (rc)
9540                 goto clean2;    /* bft, rq, ioaccel */
9541         return 0;
9542
9543 clean2: /* bft, rq, ioaccel */
9544         kfree(h->blockFetchTable);
9545         h->blockFetchTable = NULL;
9546 clean1: /* rq, ioaccel */
9547         hpsa_free_reply_queues(h);
9548         hpsa_free_ioaccel1_cmd_and_bft(h);
9549         hpsa_free_ioaccel2_cmd_and_bft(h);
9550         return rc;
9551 }
9552
9553 static int is_accelerated_cmd(struct CommandList *c)
9554 {
9555         return c->cmd_type == CMD_IOACCEL1 || c->cmd_type == CMD_IOACCEL2;
9556 }
9557
9558 static void hpsa_drain_accel_commands(struct ctlr_info *h)
9559 {
9560         struct CommandList *c = NULL;
9561         int i, accel_cmds_out;
9562         int refcount;
9563
9564         do { /* wait for all outstanding ioaccel commands to drain out */
9565                 accel_cmds_out = 0;
9566                 for (i = 0; i < h->nr_cmds; i++) {
9567                         c = h->cmd_pool + i;
9568                         refcount = atomic_inc_return(&c->refcount);
9569                         if (refcount > 1) /* Command is allocated */
9570                                 accel_cmds_out += is_accelerated_cmd(c);
9571                         cmd_free(h, c);
9572                 }
9573                 if (accel_cmds_out <= 0)
9574                         break;
9575                 msleep(100);
9576         } while (1);
9577 }
9578
9579 static struct hpsa_sas_phy *hpsa_alloc_sas_phy(
9580                                 struct hpsa_sas_port *hpsa_sas_port)
9581 {
9582         struct hpsa_sas_phy *hpsa_sas_phy;
9583         struct sas_phy *phy;
9584
9585         hpsa_sas_phy = kzalloc(sizeof(*hpsa_sas_phy), GFP_KERNEL);
9586         if (!hpsa_sas_phy)
9587                 return NULL;
9588
9589         phy = sas_phy_alloc(hpsa_sas_port->parent_node->parent_dev,
9590                 hpsa_sas_port->next_phy_index);
9591         if (!phy) {
9592                 kfree(hpsa_sas_phy);
9593                 return NULL;
9594         }
9595
9596         hpsa_sas_port->next_phy_index++;
9597         hpsa_sas_phy->phy = phy;
9598         hpsa_sas_phy->parent_port = hpsa_sas_port;
9599
9600         return hpsa_sas_phy;
9601 }
9602
9603 static void hpsa_free_sas_phy(struct hpsa_sas_phy *hpsa_sas_phy)
9604 {
9605         struct sas_phy *phy = hpsa_sas_phy->phy;
9606
9607         sas_port_delete_phy(hpsa_sas_phy->parent_port->port, phy);
9608         if (hpsa_sas_phy->added_to_port)
9609                 list_del(&hpsa_sas_phy->phy_list_entry);
9610         sas_phy_delete(phy);
9611         kfree(hpsa_sas_phy);
9612 }
9613
9614 static int hpsa_sas_port_add_phy(struct hpsa_sas_phy *hpsa_sas_phy)
9615 {
9616         int rc;
9617         struct hpsa_sas_port *hpsa_sas_port;
9618         struct sas_phy *phy;
9619         struct sas_identify *identify;
9620
9621         hpsa_sas_port = hpsa_sas_phy->parent_port;
9622         phy = hpsa_sas_phy->phy;
9623
9624         identify = &phy->identify;
9625         memset(identify, 0, sizeof(*identify));
9626         identify->sas_address = hpsa_sas_port->sas_address;
9627         identify->device_type = SAS_END_DEVICE;
9628         identify->initiator_port_protocols = SAS_PROTOCOL_STP;
9629         identify->target_port_protocols = SAS_PROTOCOL_STP;
9630         phy->minimum_linkrate_hw = SAS_LINK_RATE_UNKNOWN;
9631         phy->maximum_linkrate_hw = SAS_LINK_RATE_UNKNOWN;
9632         phy->minimum_linkrate = SAS_LINK_RATE_UNKNOWN;
9633         phy->maximum_linkrate = SAS_LINK_RATE_UNKNOWN;
9634         phy->negotiated_linkrate = SAS_LINK_RATE_UNKNOWN;
9635
9636         rc = sas_phy_add(hpsa_sas_phy->phy);
9637         if (rc)
9638                 return rc;
9639
9640         sas_port_add_phy(hpsa_sas_port->port, hpsa_sas_phy->phy);
9641         list_add_tail(&hpsa_sas_phy->phy_list_entry,
9642                         &hpsa_sas_port->phy_list_head);
9643         hpsa_sas_phy->added_to_port = true;
9644
9645         return 0;
9646 }
9647
9648 static int
9649         hpsa_sas_port_add_rphy(struct hpsa_sas_port *hpsa_sas_port,
9650                                 struct sas_rphy *rphy)
9651 {
9652         struct sas_identify *identify;
9653
9654         identify = &rphy->identify;
9655         identify->sas_address = hpsa_sas_port->sas_address;
9656         identify->initiator_port_protocols = SAS_PROTOCOL_STP;
9657         identify->target_port_protocols = SAS_PROTOCOL_STP;
9658
9659         return sas_rphy_add(rphy);
9660 }
9661
9662 static struct hpsa_sas_port
9663         *hpsa_alloc_sas_port(struct hpsa_sas_node *hpsa_sas_node,
9664                                 u64 sas_address)
9665 {
9666         int rc;
9667         struct hpsa_sas_port *hpsa_sas_port;
9668         struct sas_port *port;
9669
9670         hpsa_sas_port = kzalloc(sizeof(*hpsa_sas_port), GFP_KERNEL);
9671         if (!hpsa_sas_port)
9672                 return NULL;
9673
9674         INIT_LIST_HEAD(&hpsa_sas_port->phy_list_head);
9675         hpsa_sas_port->parent_node = hpsa_sas_node;
9676
9677         port = sas_port_alloc_num(hpsa_sas_node->parent_dev);
9678         if (!port)
9679                 goto free_hpsa_port;
9680
9681         rc = sas_port_add(port);
9682         if (rc)
9683                 goto free_sas_port;
9684
9685         hpsa_sas_port->port = port;
9686         hpsa_sas_port->sas_address = sas_address;
9687         list_add_tail(&hpsa_sas_port->port_list_entry,
9688                         &hpsa_sas_node->port_list_head);
9689
9690         return hpsa_sas_port;
9691
9692 free_sas_port:
9693         sas_port_free(port);
9694 free_hpsa_port:
9695         kfree(hpsa_sas_port);
9696
9697         return NULL;
9698 }
9699
9700 static void hpsa_free_sas_port(struct hpsa_sas_port *hpsa_sas_port)
9701 {
9702         struct hpsa_sas_phy *hpsa_sas_phy;
9703         struct hpsa_sas_phy *next;
9704
9705         list_for_each_entry_safe(hpsa_sas_phy, next,
9706                         &hpsa_sas_port->phy_list_head, phy_list_entry)
9707                 hpsa_free_sas_phy(hpsa_sas_phy);
9708
9709         sas_port_delete(hpsa_sas_port->port);
9710         list_del(&hpsa_sas_port->port_list_entry);
9711         kfree(hpsa_sas_port);
9712 }
9713
9714 static struct hpsa_sas_node *hpsa_alloc_sas_node(struct device *parent_dev)
9715 {
9716         struct hpsa_sas_node *hpsa_sas_node;
9717
9718         hpsa_sas_node = kzalloc(sizeof(*hpsa_sas_node), GFP_KERNEL);
9719         if (hpsa_sas_node) {
9720                 hpsa_sas_node->parent_dev = parent_dev;
9721                 INIT_LIST_HEAD(&hpsa_sas_node->port_list_head);
9722         }
9723
9724         return hpsa_sas_node;
9725 }
9726
9727 static void hpsa_free_sas_node(struct hpsa_sas_node *hpsa_sas_node)
9728 {
9729         struct hpsa_sas_port *hpsa_sas_port;
9730         struct hpsa_sas_port *next;
9731
9732         if (!hpsa_sas_node)
9733                 return;
9734
9735         list_for_each_entry_safe(hpsa_sas_port, next,
9736                         &hpsa_sas_node->port_list_head, port_list_entry)
9737                 hpsa_free_sas_port(hpsa_sas_port);
9738
9739         kfree(hpsa_sas_node);
9740 }
9741
9742 static struct hpsa_scsi_dev_t
9743         *hpsa_find_device_by_sas_rphy(struct ctlr_info *h,
9744                                         struct sas_rphy *rphy)
9745 {
9746         int i;
9747         struct hpsa_scsi_dev_t *device;
9748
9749         for (i = 0; i < h->ndevices; i++) {
9750                 device = h->dev[i];
9751                 if (!device->sas_port)
9752                         continue;
9753                 if (device->sas_port->rphy == rphy)
9754                         return device;
9755         }
9756
9757         return NULL;
9758 }
9759
9760 static int hpsa_add_sas_host(struct ctlr_info *h)
9761 {
9762         int rc;
9763         struct device *parent_dev;
9764         struct hpsa_sas_node *hpsa_sas_node;
9765         struct hpsa_sas_port *hpsa_sas_port;
9766         struct hpsa_sas_phy *hpsa_sas_phy;
9767
9768         parent_dev = &h->scsi_host->shost_dev;
9769
9770         hpsa_sas_node = hpsa_alloc_sas_node(parent_dev);
9771         if (!hpsa_sas_node)
9772                 return -ENOMEM;
9773
9774         hpsa_sas_port = hpsa_alloc_sas_port(hpsa_sas_node, h->sas_address);
9775         if (!hpsa_sas_port) {
9776                 rc = -ENODEV;
9777                 goto free_sas_node;
9778         }
9779
9780         hpsa_sas_phy = hpsa_alloc_sas_phy(hpsa_sas_port);
9781         if (!hpsa_sas_phy) {
9782                 rc = -ENODEV;
9783                 goto free_sas_port;
9784         }
9785
9786         rc = hpsa_sas_port_add_phy(hpsa_sas_phy);
9787         if (rc)
9788                 goto free_sas_phy;
9789
9790         h->sas_host = hpsa_sas_node;
9791
9792         return 0;
9793
9794 free_sas_phy:
9795         hpsa_free_sas_phy(hpsa_sas_phy);
9796 free_sas_port:
9797         hpsa_free_sas_port(hpsa_sas_port);
9798 free_sas_node:
9799         hpsa_free_sas_node(hpsa_sas_node);
9800
9801         return rc;
9802 }
9803
9804 static void hpsa_delete_sas_host(struct ctlr_info *h)
9805 {
9806         hpsa_free_sas_node(h->sas_host);
9807 }
9808
9809 static int hpsa_add_sas_device(struct hpsa_sas_node *hpsa_sas_node,
9810                                 struct hpsa_scsi_dev_t *device)
9811 {
9812         int rc;
9813         struct hpsa_sas_port *hpsa_sas_port;
9814         struct sas_rphy *rphy;
9815
9816         hpsa_sas_port = hpsa_alloc_sas_port(hpsa_sas_node, device->sas_address);
9817         if (!hpsa_sas_port)
9818                 return -ENOMEM;
9819
9820         rphy = sas_end_device_alloc(hpsa_sas_port->port);
9821         if (!rphy) {
9822                 rc = -ENODEV;
9823                 goto free_sas_port;
9824         }
9825
9826         hpsa_sas_port->rphy = rphy;
9827         device->sas_port = hpsa_sas_port;
9828
9829         rc = hpsa_sas_port_add_rphy(hpsa_sas_port, rphy);
9830         if (rc)
9831                 goto free_sas_port;
9832
9833         return 0;
9834
9835 free_sas_port:
9836         hpsa_free_sas_port(hpsa_sas_port);
9837         device->sas_port = NULL;
9838
9839         return rc;
9840 }
9841
9842 static void hpsa_remove_sas_device(struct hpsa_scsi_dev_t *device)
9843 {
9844         if (device->sas_port) {
9845                 hpsa_free_sas_port(device->sas_port);
9846                 device->sas_port = NULL;
9847         }
9848 }
9849
9850 static int
9851 hpsa_sas_get_linkerrors(struct sas_phy *phy)
9852 {
9853         return 0;
9854 }
9855
9856 static int
9857 hpsa_sas_get_enclosure_identifier(struct sas_rphy *rphy, u64 *identifier)
9858 {
9859         struct Scsi_Host *shost = phy_to_shost(rphy);
9860         struct ctlr_info *h;
9861         struct hpsa_scsi_dev_t *sd;
9862
9863         if (!shost)
9864                 return -ENXIO;
9865
9866         h = shost_to_hba(shost);
9867
9868         if (!h)
9869                 return -ENXIO;
9870
9871         sd = hpsa_find_device_by_sas_rphy(h, rphy);
9872         if (!sd)
9873                 return -ENXIO;
9874
9875         *identifier = sd->eli;
9876
9877         return 0;
9878 }
9879
9880 static int
9881 hpsa_sas_get_bay_identifier(struct sas_rphy *rphy)
9882 {
9883         return -ENXIO;
9884 }
9885
9886 static int
9887 hpsa_sas_phy_reset(struct sas_phy *phy, int hard_reset)
9888 {
9889         return 0;
9890 }
9891
9892 static int
9893 hpsa_sas_phy_enable(struct sas_phy *phy, int enable)
9894 {
9895         return 0;
9896 }
9897
9898 static int
9899 hpsa_sas_phy_setup(struct sas_phy *phy)
9900 {
9901         return 0;
9902 }
9903
9904 static void
9905 hpsa_sas_phy_release(struct sas_phy *phy)
9906 {
9907 }
9908
9909 static int
9910 hpsa_sas_phy_speed(struct sas_phy *phy, struct sas_phy_linkrates *rates)
9911 {
9912         return -EINVAL;
9913 }
9914
9915 static struct sas_function_template hpsa_sas_transport_functions = {
9916         .get_linkerrors = hpsa_sas_get_linkerrors,
9917         .get_enclosure_identifier = hpsa_sas_get_enclosure_identifier,
9918         .get_bay_identifier = hpsa_sas_get_bay_identifier,
9919         .phy_reset = hpsa_sas_phy_reset,
9920         .phy_enable = hpsa_sas_phy_enable,
9921         .phy_setup = hpsa_sas_phy_setup,
9922         .phy_release = hpsa_sas_phy_release,
9923         .set_phy_speed = hpsa_sas_phy_speed,
9924 };
9925
9926 /*
9927  *  This is it.  Register the PCI driver information for the cards we control
9928  *  the OS will call our registered routines when it finds one of our cards.
9929  */
9930 static int __init hpsa_init(void)
9931 {
9932         int rc;
9933
9934         hpsa_sas_transport_template =
9935                 sas_attach_transport(&hpsa_sas_transport_functions);
9936         if (!hpsa_sas_transport_template)
9937                 return -ENODEV;
9938
9939         rc = pci_register_driver(&hpsa_pci_driver);
9940
9941         if (rc)
9942                 sas_release_transport(hpsa_sas_transport_template);
9943
9944         return rc;
9945 }
9946
9947 static void __exit hpsa_cleanup(void)
9948 {
9949         pci_unregister_driver(&hpsa_pci_driver);
9950         sas_release_transport(hpsa_sas_transport_template);
9951 }
9952
9953 static void __attribute__((unused)) verify_offsets(void)
9954 {
9955 #define VERIFY_OFFSET(member, offset) \
9956         BUILD_BUG_ON(offsetof(struct raid_map_data, member) != offset)
9957
9958         VERIFY_OFFSET(structure_size, 0);
9959         VERIFY_OFFSET(volume_blk_size, 4);
9960         VERIFY_OFFSET(volume_blk_cnt, 8);
9961         VERIFY_OFFSET(phys_blk_shift, 16);
9962         VERIFY_OFFSET(parity_rotation_shift, 17);
9963         VERIFY_OFFSET(strip_size, 18);
9964         VERIFY_OFFSET(disk_starting_blk, 20);
9965         VERIFY_OFFSET(disk_blk_cnt, 28);
9966         VERIFY_OFFSET(data_disks_per_row, 36);
9967         VERIFY_OFFSET(metadata_disks_per_row, 38);
9968         VERIFY_OFFSET(row_cnt, 40);
9969         VERIFY_OFFSET(layout_map_count, 42);
9970         VERIFY_OFFSET(flags, 44);
9971         VERIFY_OFFSET(dekindex, 46);
9972         /* VERIFY_OFFSET(reserved, 48 */
9973         VERIFY_OFFSET(data, 64);
9974
9975 #undef VERIFY_OFFSET
9976
9977 #define VERIFY_OFFSET(member, offset) \
9978         BUILD_BUG_ON(offsetof(struct io_accel2_cmd, member) != offset)
9979
9980         VERIFY_OFFSET(IU_type, 0);
9981         VERIFY_OFFSET(direction, 1);
9982         VERIFY_OFFSET(reply_queue, 2);
9983         /* VERIFY_OFFSET(reserved1, 3);  */
9984         VERIFY_OFFSET(scsi_nexus, 4);
9985         VERIFY_OFFSET(Tag, 8);
9986         VERIFY_OFFSET(cdb, 16);
9987         VERIFY_OFFSET(cciss_lun, 32);
9988         VERIFY_OFFSET(data_len, 40);
9989         VERIFY_OFFSET(cmd_priority_task_attr, 44);
9990         VERIFY_OFFSET(sg_count, 45);
9991         /* VERIFY_OFFSET(reserved3 */
9992         VERIFY_OFFSET(err_ptr, 48);
9993         VERIFY_OFFSET(err_len, 56);
9994         /* VERIFY_OFFSET(reserved4  */
9995         VERIFY_OFFSET(sg, 64);
9996
9997 #undef VERIFY_OFFSET
9998
9999 #define VERIFY_OFFSET(member, offset) \
10000         BUILD_BUG_ON(offsetof(struct io_accel1_cmd, member) != offset)
10001
10002         VERIFY_OFFSET(dev_handle, 0x00);
10003         VERIFY_OFFSET(reserved1, 0x02);
10004         VERIFY_OFFSET(function, 0x03);
10005         VERIFY_OFFSET(reserved2, 0x04);
10006         VERIFY_OFFSET(err_info, 0x0C);
10007         VERIFY_OFFSET(reserved3, 0x10);
10008         VERIFY_OFFSET(err_info_len, 0x12);
10009         VERIFY_OFFSET(reserved4, 0x13);
10010         VERIFY_OFFSET(sgl_offset, 0x14);
10011         VERIFY_OFFSET(reserved5, 0x15);
10012         VERIFY_OFFSET(transfer_len, 0x1C);
10013         VERIFY_OFFSET(reserved6, 0x20);
10014         VERIFY_OFFSET(io_flags, 0x24);
10015         VERIFY_OFFSET(reserved7, 0x26);
10016         VERIFY_OFFSET(LUN, 0x34);
10017         VERIFY_OFFSET(control, 0x3C);
10018         VERIFY_OFFSET(CDB, 0x40);
10019         VERIFY_OFFSET(reserved8, 0x50);
10020         VERIFY_OFFSET(host_context_flags, 0x60);
10021         VERIFY_OFFSET(timeout_sec, 0x62);
10022         VERIFY_OFFSET(ReplyQueue, 0x64);
10023         VERIFY_OFFSET(reserved9, 0x65);
10024         VERIFY_OFFSET(tag, 0x68);
10025         VERIFY_OFFSET(host_addr, 0x70);
10026         VERIFY_OFFSET(CISS_LUN, 0x78);
10027         VERIFY_OFFSET(SG, 0x78 + 8);
10028 #undef VERIFY_OFFSET
10029 }
10030
10031 module_init(hpsa_init);
10032 module_exit(hpsa_cleanup);