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nbd: move request validity checking into nbd_send_cmd
[linux.git] / drivers / block / cciss.c
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1da177e4 1/*
bd4f36d6
MM		 2 * Disk Array driver for HP Smart Array controllers.
3 * (C) Copyright 2000, 2007 Hewlett-Packard Development Company, L.P.
1da177e4
LT		 4 *
5 * This program is free software; you can redistribute it and/or modify
6 * it under the terms of the GNU General Public License as published by
bd4f36d6 7 * the Free Software Foundation; version 2 of the License.
1da177e4
LT		 8 *
9 * This program is distributed in the hope that it will be useful,
10 * but WITHOUT ANY WARRANTY; without even the implied warranty of
bd4f36d6
MM		 11 * MERCHANTABILITY OR FITNESS FOR A PARTICULAR PURPOSE. See the GNU
12 * General Public License for more details.
1da177e4
LT		 13 *
14 * You should have received a copy of the GNU General Public License
15 * along with this program; if not, write to the Free Software
bd4f36d6
MM		 16 * Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA
17 * 02111-1307, USA.
1da177e4
LT		 18 *
19 * Questions/Comments/Bugfixes to [email protected]
20 *
21 */
22
1da177e4
LT		 23#include <linux/module.h>
24#include <linux/interrupt.h>
25#include <linux/types.h>
26#include <linux/pci.h>
19373358 27#include <linux/pci-aspm.h>
1da177e4
LT		 28#include <linux/kernel.h>
29#include <linux/slab.h>
30#include <linux/delay.h>
31#include <linux/major.h>
32#include <linux/fs.h>
33#include <linux/bio.h>
34#include <linux/blkpg.h>
35#include <linux/timer.h>
36#include <linux/proc_fs.h>
89b6e743 37#include <linux/seq_file.h>
7c832835 38#include <linux/init.h>
4d761609 39#include <linux/jiffies.h>
1da177e4
LT		 40#include <linux/hdreg.h>
41#include <linux/spinlock.h>
42#include <linux/compat.h>
b368c9dd 43#include <linux/mutex.h>
1f118bc4 44#include <linux/bitmap.h>
d48c152a 45#include <linux/io.h>
7c0f6ba6 46#include <linux/uaccess.h>
1da177e4 47
eb0df996 48#include <linux/dma-mapping.h>
1da177e4
LT		 49#include <linux/blkdev.h>
50#include <linux/genhd.h>
51#include <linux/completion.h>
d5d3b736 52#include <scsi/scsi.h>
03bbfee5
MMOD		 53#include <scsi/sg.h>
54#include <scsi/scsi_ioctl.h>
82ed4db4 55#include <scsi/scsi_request.h>
03bbfee5 56#include <linux/cdrom.h>
231bc2a2 57#include <linux/scatterlist.h>
0a9279cc 58#include <linux/kthread.h>
1da177e4
LT		 59
60#define CCISS_DRIVER_VERSION(maj,min,submin) ((maj<<16)|(min<<8)|(submin))
841fdffd
MM		 61#define DRIVER_NAME "HP CISS Driver (v 3.6.26)"
62#define DRIVER_VERSION CCISS_DRIVER_VERSION(3, 6, 26)
1da177e4
LT		 63
64/* Embedded module documentation macros - see modules.h */
65MODULE_AUTHOR("Hewlett-Packard Company");
24aac480 66MODULE_DESCRIPTION("Driver for HP Smart Array Controllers");
841fdffd
MM		 67MODULE_SUPPORTED_DEVICE("HP Smart Array Controllers");
68MODULE_VERSION("3.6.26");
1da177e4 69MODULE_LICENSE("GPL");
8a4ec67b
SC		 70static int cciss_tape_cmds = 6;
71module_param(cciss_tape_cmds, int, 0644);
72MODULE_PARM_DESC(cciss_tape_cmds,
73 "number of commands to allocate for tape devices (default: 6)");
13049537
JH		 74static int cciss_simple_mode;
75module_param(cciss_simple_mode, int, S_IRUGO|S_IWUSR);
76MODULE_PARM_DESC(cciss_simple_mode,
77 "Use 'simple mode' rather than 'performant mode'");
1da177e4 78
e4292e05
MM		 79static int cciss_allow_hpsa;
80module_param(cciss_allow_hpsa, int, S_IRUGO|S_IWUSR);
81MODULE_PARM_DESC(cciss_allow_hpsa,
82 "Prevent cciss driver from accessing hardware known to be "
83 " supported by the hpsa driver");
84
2a48fc0a 85static DEFINE_MUTEX(cciss_mutex);
bbe425cd 86static struct proc_dir_entry *proc_cciss;
2ec24ff1 87
1da177e4
LT		 88#include "cciss_cmd.h"
89#include "cciss.h"
90#include <linux/cciss_ioctl.h>
91
92/* define the PCI info for the cards we can control */
93static const struct pci_device_id cciss_pci_device_id[] = {
f82ccdb9
BH		 94 {PCI_VENDOR_ID_COMPAQ, PCI_DEVICE_ID_COMPAQ_CISS, 0x0E11, 0x4070},
95 {PCI_VENDOR_ID_COMPAQ, PCI_DEVICE_ID_COMPAQ_CISSB, 0x0E11, 0x4080},
96 {PCI_VENDOR_ID_COMPAQ, PCI_DEVICE_ID_COMPAQ_CISSB, 0x0E11, 0x4082},
97 {PCI_VENDOR_ID_COMPAQ, PCI_DEVICE_ID_COMPAQ_CISSB, 0x0E11, 0x4083},
98 {PCI_VENDOR_ID_COMPAQ, PCI_DEVICE_ID_COMPAQ_CISSC, 0x0E11, 0x4091},
99 {PCI_VENDOR_ID_COMPAQ, PCI_DEVICE_ID_COMPAQ_CISSC, 0x0E11, 0x409A},
100 {PCI_VENDOR_ID_COMPAQ, PCI_DEVICE_ID_COMPAQ_CISSC, 0x0E11, 0x409B},
101 {PCI_VENDOR_ID_COMPAQ, PCI_DEVICE_ID_COMPAQ_CISSC, 0x0E11, 0x409C},
102 {PCI_VENDOR_ID_COMPAQ, PCI_DEVICE_ID_COMPAQ_CISSC, 0x0E11, 0x409D},
103 {PCI_VENDOR_ID_HP, PCI_DEVICE_ID_HP_CISSA, 0x103C, 0x3225},
104 {PCI_VENDOR_ID_HP, PCI_DEVICE_ID_HP_CISSC, 0x103C, 0x3223},
105 {PCI_VENDOR_ID_HP, PCI_DEVICE_ID_HP_CISSC, 0x103C, 0x3234},
106 {PCI_VENDOR_ID_HP, PCI_DEVICE_ID_HP_CISSC, 0x103C, 0x3235},
107 {PCI_VENDOR_ID_HP, PCI_DEVICE_ID_HP_CISSD, 0x103C, 0x3211},
108 {PCI_VENDOR_ID_HP, PCI_DEVICE_ID_HP_CISSD, 0x103C, 0x3212},
109 {PCI_VENDOR_ID_HP, PCI_DEVICE_ID_HP_CISSD, 0x103C, 0x3213},
110 {PCI_VENDOR_ID_HP, PCI_DEVICE_ID_HP_CISSD, 0x103C, 0x3214},
111 {PCI_VENDOR_ID_HP, PCI_DEVICE_ID_HP_CISSD, 0x103C, 0x3215},
de923916 112 {PCI_VENDOR_ID_HP, PCI_DEVICE_ID_HP_CISSC, 0x103C, 0x3237},
9cff3b38 113 {PCI_VENDOR_ID_HP, PCI_DEVICE_ID_HP_CISSC, 0x103C, 0x323D},
1da177e4
LT		 114 {0,}
115};
7c832835 116
1da177e4
LT		 117MODULE_DEVICE_TABLE(pci, cciss_pci_device_id);
118
1da177e4
LT		 119/* board_id = Subsystem Device ID & Vendor ID
120 * product = Marketing Name for the board
7c832835 121 * access = Address of the struct of function pointers
1da177e4
LT		 122 */
123static struct board_type products[] = {
49153998
MM		 124 {0x40700E11, "Smart Array 5300", &SA5_access},
125 {0x40800E11, "Smart Array 5i", &SA5B_access},
126 {0x40820E11, "Smart Array 532", &SA5B_access},
127 {0x40830E11, "Smart Array 5312", &SA5B_access},
128 {0x409A0E11, "Smart Array 641", &SA5_access},
129 {0x409B0E11, "Smart Array 642", &SA5_access},
130 {0x409C0E11, "Smart Array 6400", &SA5_access},
131 {0x409D0E11, "Smart Array 6400 EM", &SA5_access},
132 {0x40910E11, "Smart Array 6i", &SA5_access},
133 {0x3225103C, "Smart Array P600", &SA5_access},
4205df34
SC		 134 {0x3223103C, "Smart Array P800", &SA5_access},
135 {0x3234103C, "Smart Array P400", &SA5_access},
49153998
MM		 136 {0x3235103C, "Smart Array P400i", &SA5_access},
137 {0x3211103C, "Smart Array E200i", &SA5_access},
138 {0x3212103C, "Smart Array E200", &SA5_access},
139 {0x3213103C, "Smart Array E200i", &SA5_access},
140 {0x3214103C, "Smart Array E200i", &SA5_access},
141 {0x3215103C, "Smart Array E200i", &SA5_access},
142 {0x3237103C, "Smart Array E500", &SA5_access},
143 {0x323D103C, "Smart Array P700m", &SA5_access},
1da177e4
LT		 144};
145
d14c4ab5 146/* How long to wait (in milliseconds) for board to go into simple mode */
7c832835 147#define MAX_CONFIG_WAIT 30000
1da177e4
LT		 148#define MAX_IOCTL_CONFIG_WAIT 1000
149
150/*define how many times we will try a command because of bus resets */
151#define MAX_CMD_RETRIES 3
152
1da177e4
LT		 153#define MAX_CTLR 32
154
155/* Originally cciss driver only supports 8 major numbers */
156#define MAX_CTLR_ORIG 8
157
1da177e4
LT		 158static ctlr_info_t *hba[MAX_CTLR];
159
b368c9dd
AP		 160static struct task_struct *cciss_scan_thread;
161static DEFINE_MUTEX(scan_mutex);
162static LIST_HEAD(scan_q);
163
165125e1 164static void do_cciss_request(struct request_queue *q);
0c2b3908
MM		 165static irqreturn_t do_cciss_intx(int irq, void *dev_id);
166static irqreturn_t do_cciss_msix_intr(int irq, void *dev_id);
ef7822c2 167static int cciss_open(struct block_device *bdev, fmode_t mode);
6e9624b8 168static int cciss_unlocked_open(struct block_device *bdev, fmode_t mode);
db2a144b 169static void cciss_release(struct gendisk *disk, fmode_t mode);
ef7822c2 170static int cciss_ioctl(struct block_device *bdev, fmode_t mode,
7c832835 171 unsigned int cmd, unsigned long arg);
a885c8c4 172static int cciss_getgeo(struct block_device *bdev, struct hd_geometry *geo);
1da177e4 173
1da177e4 174static int cciss_revalidate(struct gendisk *disk);
2d11d993 175static int rebuild_lun_table(ctlr_info_t *h, int first_time, int via_ioctl);
a0ea8622 176static int deregister_disk(ctlr_info_t *h, int drv_index,
2d11d993 177 int clear_all, int via_ioctl);
1da177e4 178
f70dba83 179static void cciss_read_capacity(ctlr_info_t *h, int logvol,
00988a35 180 sector_t *total_size, unsigned int *block_size);
f70dba83 181static void cciss_read_capacity_16(ctlr_info_t *h, int logvol,
00988a35 182 sector_t *total_size, unsigned int *block_size);
f70dba83 183static void cciss_geometry_inquiry(ctlr_info_t *h, int logvol,
7b838bde 184 sector_t total_size,
00988a35 185 unsigned int block_size, InquiryData_struct *inq_buff,
7c832835 186 drive_info_struct *drv);
8d85fce7
GKH		 187static void cciss_interrupt_mode(ctlr_info_t *);
188static int cciss_enter_simple_mode(struct ctlr_info *h);
7c832835 189static void start_io(ctlr_info_t *h);
f70dba83 190static int sendcmd_withirq(ctlr_info_t *h, __u8 cmd, void *buff, size_t size,
b57695fe 191 __u8 page_code, unsigned char scsi3addr[],
192 int cmd_type);
85cc61ae 193static int sendcmd_withirq_core(ctlr_info_t *h, CommandList_struct *c,
194 int attempt_retry);
195static int process_sendcmd_error(ctlr_info_t *h, CommandList_struct *c);
1da177e4 196
d6f4965d 197static int add_to_scan_list(struct ctlr_info *h);
0a9279cc
MM		 198static int scan_thread(void *data);
199static int check_for_unit_attention(ctlr_info_t *h, CommandList_struct *c);
617e1344
SC		 200static void cciss_hba_release(struct device *dev);
201static void cciss_device_release(struct device *dev);
361e9b07 202static void cciss_free_gendisk(ctlr_info_t *h, int drv_index);
9cef0d2f 203static void cciss_free_drive_info(ctlr_info_t *h, int drv_index);
29979a71 204static inline u32 next_command(ctlr_info_t *h);
8d85fce7
GKH		 205static int cciss_find_cfg_addrs(struct pci_dev *pdev, void __iomem *vaddr,
206 u32 *cfg_base_addr, u64 *cfg_base_addr_index,
207 u64 *cfg_offset);
208static int cciss_pci_find_memory_BAR(struct pci_dev *pdev,
209 unsigned long *memory_bar);
16011131 210static inline u32 cciss_tag_discard_error_bits(ctlr_info_t *h, u32 tag);
8d85fce7 211static int write_driver_ver_to_cfgtable(CfgTable_struct __iomem *cfgtable);
33079b21 212
5e216153
MM		 213/* performant mode helper functions */
214static void calc_bucket_map(int *bucket, int num_buckets, int nsgs,
215 int *bucket_map);
216static void cciss_put_controller_into_performant_mode(ctlr_info_t *h);
33079b21 217
1da177e4 218#ifdef CONFIG_PROC_FS
f70dba83 219static void cciss_procinit(ctlr_info_t *h);
1da177e4 220#else
f70dba83 221static void cciss_procinit(ctlr_info_t *h)
7c832835
BH		 222{
223}
224#endif /* CONFIG_PROC_FS */
1da177e4
LT		 225
226#ifdef CONFIG_COMPAT
ef7822c2
AV		 227static int cciss_compat_ioctl(struct block_device *, fmode_t,
228 unsigned, unsigned long);
1da177e4
LT		 229#endif
230
83d5cde4 231static const struct block_device_operations cciss_fops = {
7c832835 232 .owner = THIS_MODULE,
6e9624b8 233 .open = cciss_unlocked_open,
ef7822c2 234 .release = cciss_release,
03f47e88 235 .ioctl = cciss_ioctl,
7c832835 236 .getgeo = cciss_getgeo,
1da177e4 237#ifdef CONFIG_COMPAT
ef7822c2 238 .compat_ioctl = cciss_compat_ioctl,
1da177e4 239#endif
7c832835 240 .revalidate_disk = cciss_revalidate,
1da177e4
LT		 241};
242
5e216153
MM		 243/* set_performant_mode: Modify the tag for cciss performant
244 * set bit 0 for pull model, bits 3-1 for block fetch
245 * register number
246 */
247static void set_performant_mode(ctlr_info_t *h, CommandList_struct *c)
248{
0498cc2a 249 if (likely(h->transMethod & CFGTBL_Trans_Performant))
5e216153
MM		 250 c->busaddr |= 1 | (h->blockFetchTable[c->Header.SGList] << 1);
251}
252
1da177e4
LT		 253/*
254 * Enqueuing and dequeuing functions for cmdlists.
255 */
e6e1ee93 256static inline void addQ(struct list_head *list, CommandList_struct *c)
1da177e4 257{
e6e1ee93 258 list_add_tail(&c->list, list);
1da177e4
LT		 259}
260
8a3173de 261static inline void removeQ(CommandList_struct *c)
1da177e4 262{
b59e64d0
HR		 263 /*
264 * After kexec/dump some commands might still
265 * be in flight, which the firmware will try
266 * to complete. Resetting the firmware doesn't work
267 * with old fw revisions, so we have to mark
268 * them off as 'stale' to prevent the driver from
269 * falling over.
270 */
e6e1ee93 271 if (WARN_ON(list_empty(&c->list))) {
b59e64d0 272 c->cmd_type = CMD_MSG_STALE;
8a3173de 273 return;
b59e64d0 274 }
8a3173de 275
e6e1ee93 276 list_del_init(&c->list);
1da177e4
LT		 277}
278
664a717d
MM		 279static void enqueue_cmd_and_start_io(ctlr_info_t *h,
280 CommandList_struct *c)
281{
282 unsigned long flags;
5e216153 283 set_performant_mode(h, c);
664a717d
MM		 284 spin_lock_irqsave(&h->lock, flags);
285 addQ(&h->reqQ, c);
286 h->Qdepth++;
2a643ec6
SC		 287 if (h->Qdepth > h->maxQsinceinit)
288 h->maxQsinceinit = h->Qdepth;
664a717d
MM		 289 start_io(h);
290 spin_unlock_irqrestore(&h->lock, flags);
291}
292
dccc9b56 293static void cciss_free_sg_chain_blocks(SGDescriptor_struct **cmd_sg_list,
49fc5601
SC		 294 int nr_cmds)
295{
296 int i;
297
298 if (!cmd_sg_list)
299 return;
300 for (i = 0; i < nr_cmds; i++) {
dccc9b56
SC		 301 kfree(cmd_sg_list[i]);
302 cmd_sg_list[i] = NULL;
49fc5601
SC		 303 }
304 kfree(cmd_sg_list);
305}
306
dccc9b56
SC		 307static SGDescriptor_struct **cciss_allocate_sg_chain_blocks(
308 ctlr_info_t *h, int chainsize, int nr_cmds)
49fc5601
SC		 309{
310 int j;
dccc9b56 311 SGDescriptor_struct **cmd_sg_list;
49fc5601
SC		 312
313 if (chainsize <= 0)
314 return NULL;
315
316 cmd_sg_list = kmalloc(sizeof(*cmd_sg_list) * nr_cmds, GFP_KERNEL);
317 if (!cmd_sg_list)
318 return NULL;
319
320 /* Build up chain blocks for each command */
321 for (j = 0; j < nr_cmds; j++) {
49fc5601 322 /* Need a block of chainsized s/g elements. */
dccc9b56
SC		 323 cmd_sg_list[j] = kmalloc((chainsize *
324 sizeof(*cmd_sg_list[j])), GFP_KERNEL);
325 if (!cmd_sg_list[j]) {
49fc5601
SC		 326 dev_err(&h->pdev->dev, "Cannot get memory "
327 "for s/g chains.\n");
328 goto clean;
329 }
330 }
331 return cmd_sg_list;
332clean:
333 cciss_free_sg_chain_blocks(cmd_sg_list, nr_cmds);
334 return NULL;
335}
336
d45033ef
SC		 337static void cciss_unmap_sg_chain_block(ctlr_info_t *h, CommandList_struct *c)
338{
339 SGDescriptor_struct *chain_sg;
340 u64bit temp64;
341
342 if (c->Header.SGTotal <= h->max_cmd_sgentries)
343 return;
344
345 chain_sg = &c->SG[h->max_cmd_sgentries - 1];
346 temp64.val32.lower = chain_sg->Addr.lower;
347 temp64.val32.upper = chain_sg->Addr.upper;
348 pci_unmap_single(h->pdev, temp64.val, chain_sg->Len, PCI_DMA_TODEVICE);
349}
350
351static void cciss_map_sg_chain_block(ctlr_info_t *h, CommandList_struct *c,
352 SGDescriptor_struct *chain_block, int len)
353{
354 SGDescriptor_struct *chain_sg;
355 u64bit temp64;
356
357 chain_sg = &c->SG[h->max_cmd_sgentries - 1];
358 chain_sg->Ext = CCISS_SG_CHAIN;
359 chain_sg->Len = len;
360 temp64.val = pci_map_single(h->pdev, chain_block, len,
361 PCI_DMA_TODEVICE);
362 chain_sg->Addr.lower = temp64.val32.lower;
363 chain_sg->Addr.upper = temp64.val32.upper;
364}
365
1da177e4
LT		 366#include "cciss_scsi.c" /* For SCSI tape support */
367
1e6f2dc1
AB		 368static const char *raid_label[] = { "0", "4", "1(1+0)", "5", "5+1", "ADG",
369 "UNKNOWN"
370};
0e4a9d03 371#define RAID_UNKNOWN (ARRAY_SIZE(raid_label)-1)
0f5486ec 372
1da177e4
LT		 373#ifdef CONFIG_PROC_FS
374
375/*
376 * Report information about this controller.
377 */
378#define ENG_GIG 1000000000
379#define ENG_GIG_FACTOR (ENG_GIG/512)
89b6e743 380#define ENGAGE_SCSI "engage scsi"
1da177e4 381
89b6e743 382static void cciss_seq_show_header(struct seq_file *seq)
1da177e4 383{
89b6e743
MM		 384 ctlr_info_t *h = seq->private;
385
386 seq_printf(seq, "%s: HP %s Controller\n"
387 "Board ID: 0x%08lx\n"
388 "Firmware Version: %c%c%c%c\n"
389 "IRQ: %d\n"
390 "Logical drives: %d\n"
391 "Current Q depth: %d\n"
392 "Current # commands on controller: %d\n"
393 "Max Q depth since init: %d\n"
394 "Max # commands on controller since init: %d\n"
395 "Max SG entries since init: %d\n",
396 h->devname,
397 h->product_name,
398 (unsigned long)h->board_id,
399 h->firm_ver[0], h->firm_ver[1], h->firm_ver[2],
13049537 400 h->firm_ver[3], (unsigned int)h->intr[h->intr_mode],
89b6e743
MM		 401 h->num_luns,
402 h->Qdepth, h->commands_outstanding,
403 h->maxQsinceinit, h->max_outstanding, h->maxSG);
404
405#ifdef CONFIG_CISS_SCSI_TAPE
f70dba83 406 cciss_seq_tape_report(seq, h);
89b6e743
MM		 407#endif /* CONFIG_CISS_SCSI_TAPE */
408}
1da177e4 409
89b6e743
MM		 410static void *cciss_seq_start(struct seq_file *seq, loff_t *pos)
411{
412 ctlr_info_t *h = seq->private;
89b6e743 413 unsigned long flags;
1da177e4
LT		 414
415 /* prevent displaying bogus info during configuration
416 * or deconfiguration of a logical volume
417 */
f70dba83 418 spin_lock_irqsave(&h->lock, flags);
1da177e4 419 if (h->busy_configuring) {
f70dba83 420 spin_unlock_irqrestore(&h->lock, flags);
89b6e743 421 return ERR_PTR(-EBUSY);
1da177e4
LT		 422 }
423 h->busy_configuring = 1;
f70dba83 424 spin_unlock_irqrestore(&h->lock, flags);
1da177e4 425
89b6e743
MM		 426 if (*pos == 0)
427 cciss_seq_show_header(seq);
428
429 return pos;
430}
431
432static int cciss_seq_show(struct seq_file *seq, void *v)
433{
434 sector_t vol_sz, vol_sz_frac;
435 ctlr_info_t *h = seq->private;
436 unsigned ctlr = h->ctlr;
437 loff_t *pos = v;
9cef0d2f 438 drive_info_struct *drv = h->drv[*pos];
89b6e743
MM		 439
440 if (*pos > h->highest_lun)
441 return 0;
442
531c2dc7
SC		 443 if (drv == NULL) /* it's possible for h->drv[] to have holes. */
444 return 0;
445
89b6e743
MM		 446 if (drv->heads == 0)
447 return 0;
448
449 vol_sz = drv->nr_blocks;
450 vol_sz_frac = sector_div(vol_sz, ENG_GIG_FACTOR);
451 vol_sz_frac *= 100;
452 sector_div(vol_sz_frac, ENG_GIG_FACTOR);
453
fa52bec9 454 if (drv->raid_level < 0 || drv->raid_level > RAID_UNKNOWN)
89b6e743
MM		 455 drv->raid_level = RAID_UNKNOWN;
456 seq_printf(seq, "cciss/c%dd%d:"
457 "\t%4u.%02uGB\tRAID %s\n",
458 ctlr, (int) *pos, (int)vol_sz, (int)vol_sz_frac,
459 raid_label[drv->raid_level]);
460 return 0;
461}
462
463static void *cciss_seq_next(struct seq_file *seq, void *v, loff_t *pos)
464{
465 ctlr_info_t *h = seq->private;
466
467 if (*pos > h->highest_lun)
468 return NULL;
469 *pos += 1;
470
471 return pos;
472}
473
474static void cciss_seq_stop(struct seq_file *seq, void *v)
475{
476 ctlr_info_t *h = seq->private;
477
478 /* Only reset h->busy_configuring if we succeeded in setting
479 * it during cciss_seq_start. */
480 if (v == ERR_PTR(-EBUSY))
481 return;
7c832835 482
1da177e4 483 h->busy_configuring = 0;
1da177e4
LT		 484}
485
88e9d34c 486static const struct seq_operations cciss_seq_ops = {
89b6e743
MM		 487 .start = cciss_seq_start,
488 .show = cciss_seq_show,
489 .next = cciss_seq_next,
490 .stop = cciss_seq_stop,
491};
492
493static int cciss_seq_open(struct inode *inode, struct file *file)
494{
495 int ret = seq_open(file, &cciss_seq_ops);
496 struct seq_file *seq = file->private_data;
497
498 if (!ret)
d9dda78b 499 seq->private = PDE_DATA(inode);
89b6e743
MM		 500
501 return ret;
502}
503
504static ssize_t
505cciss_proc_write(struct file *file, const char __user *buf,
506 size_t length, loff_t *ppos)
1da177e4 507{
89b6e743
MM		 508 int err;
509 char *buffer;
510
511#ifndef CONFIG_CISS_SCSI_TAPE
512 return -EINVAL;
1da177e4
LT		 513#endif
514
89b6e743 515 if (!buf || length > PAGE_SIZE - 1)
7c832835 516 return -EINVAL;
89b6e743 517
e4e85bb0
AV		 518 buffer = memdup_user_nul(buf, length);
519 if (IS_ERR(buffer))
520 return PTR_ERR(buffer);
89b6e743
MM		 521
522#ifdef CONFIG_CISS_SCSI_TAPE
523 if (strncmp(ENGAGE_SCSI, buffer, sizeof ENGAGE_SCSI - 1) == 0) {
524 struct seq_file *seq = file->private_data;
525 ctlr_info_t *h = seq->private;
89b6e743 526
f70dba83 527 err = cciss_engage_scsi(h);
8721c81f 528 if (err == 0)
89b6e743
MM		 529 err = length;
530 } else
531#endif /* CONFIG_CISS_SCSI_TAPE */
532 err = -EINVAL;
7c832835
BH		 533 /* might be nice to have "disengage" too, but it's not
534 safely possible. (only 1 module use count, lock issues.) */
89b6e743 535
e4e85bb0 536 kfree(buffer);
89b6e743 537 return err;
1da177e4
LT		 538}
539
828c0950 540static const struct file_operations cciss_proc_fops = {
89b6e743
MM		 541 .owner = THIS_MODULE,
542 .open = cciss_seq_open,
543 .read = seq_read,
544 .llseek = seq_lseek,
545 .release = seq_release,
546 .write = cciss_proc_write,
547};
548
8d85fce7 549static void cciss_procinit(ctlr_info_t *h)
1da177e4
LT		 550{
551 struct proc_dir_entry *pde;
552
89b6e743 553 if (proc_cciss == NULL)
928b4d8c 554 proc_cciss = proc_mkdir("driver/cciss", NULL);
89b6e743
MM		 555 if (!proc_cciss)
556 return;
f70dba83 557 pde = proc_create_data(h->devname, S_IWUSR | S_IRUSR | S_IRGRP |
89b6e743 558 S_IROTH, proc_cciss,
f70dba83 559 &cciss_proc_fops, h);
1da177e4 560}
7c832835 561#endif /* CONFIG_PROC_FS */
1da177e4 562
7fe06326
AP		 563#define MAX_PRODUCT_NAME_LEN 19
564
565#define to_hba(n) container_of(n, struct ctlr_info, dev)
566#define to_drv(n) container_of(n, drive_info_struct, dev)
567
ec52d5f1 568/* List of controllers which cannot be hard reset on kexec with reset_devices */
957c2ec5 569static u32 unresettable_controller[] = {
957c2ec5
SC		 570 0x3223103C, /* Smart Array P800 */
571 0x3234103C, /* Smart Array P400 */
572 0x3235103C, /* Smart Array P400i */
573 0x3211103C, /* Smart Array E200i */
574 0x3212103C, /* Smart Array E200 */
575 0x3213103C, /* Smart Array E200i */
576 0x3214103C, /* Smart Array E200i */
577 0x3215103C, /* Smart Array E200i */
578 0x3237103C, /* Smart Array E500 */
579 0x323D103C, /* Smart Array P700m */
b9ea9dcd 580 0x40800E11, /* Smart Array 5i */
957c2ec5
SC		 581 0x409C0E11, /* Smart Array 6400 */
582 0x409D0E11, /* Smart Array 6400 EM */
b9ea9dcd
TH		 583 0x40700E11, /* Smart Array 5300 */
584 0x40820E11, /* Smart Array 532 */
585 0x40830E11, /* Smart Array 5312 */
586 0x409A0E11, /* Smart Array 641 */
587 0x409B0E11, /* Smart Array 642 */
588 0x40910E11, /* Smart Array 6i */
957c2ec5
SC		 589};
590
ec52d5f1
SC		 591/* List of controllers which cannot even be soft reset */
592static u32 soft_unresettable_controller[] = {
b9ea9dcd
TH		 593 0x40800E11, /* Smart Array 5i */
594 0x40700E11, /* Smart Array 5300 */
595 0x40820E11, /* Smart Array 532 */
596 0x40830E11, /* Smart Array 5312 */
597 0x409A0E11, /* Smart Array 641 */
598 0x409B0E11, /* Smart Array 642 */
599 0x40910E11, /* Smart Array 6i */
600 /* Exclude 640x boards. These are two pci devices in one slot
601 * which share a battery backed cache module. One controls the
602 * cache, the other accesses the cache through the one that controls
603 * it. If we reset the one controlling the cache, the other will
604 * likely not be happy. Just forbid resetting this conjoined mess.
605 */
ec52d5f1
SC		 606 0x409C0E11, /* Smart Array 6400 */
607 0x409D0E11, /* Smart Array 6400 EM */
608};
609
610static int ctlr_is_hard_resettable(u32 board_id)
957c2ec5
SC		 611{
612 int i;
613
614 for (i = 0; i < ARRAY_SIZE(unresettable_controller); i++)
ec52d5f1 615 if (unresettable_controller[i] == board_id)
957c2ec5
SC		 616 return 0;
617 return 1;
618}
619
ec52d5f1
SC		 620static int ctlr_is_soft_resettable(u32 board_id)
621{
622 int i;
623
624 for (i = 0; i < ARRAY_SIZE(soft_unresettable_controller); i++)
625 if (soft_unresettable_controller[i] == board_id)
626 return 0;
627 return 1;
628}
629
630static int ctlr_is_resettable(u32 board_id)
631{
632 return ctlr_is_hard_resettable(board_id) ||
633 ctlr_is_soft_resettable(board_id);
634}
635
957c2ec5
SC		 636static ssize_t host_show_resettable(struct device *dev,
637 struct device_attribute *attr,
638 char *buf)
639{
640 struct ctlr_info *h = to_hba(dev);
641
ec52d5f1 642 return snprintf(buf, 20, "%d\n", ctlr_is_resettable(h->board_id));
957c2ec5
SC		 643}
644static DEVICE_ATTR(resettable, S_IRUGO, host_show_resettable, NULL);
645
d6f4965d
AP		 646static ssize_t host_store_rescan(struct device *dev,
647 struct device_attribute *attr,
648 const char *buf, size_t count)
649{
650 struct ctlr_info *h = to_hba(dev);
651
652 add_to_scan_list(h);
653 wake_up_process(cciss_scan_thread);
654 wait_for_completion_interruptible(&h->scan_wait);
655
656 return count;
657}
8ba95c69 658static DEVICE_ATTR(rescan, S_IWUSR, NULL, host_store_rescan);
7fe06326 659
f963d270
JH		 660static ssize_t host_show_transport_mode(struct device *dev,
661 struct device_attribute *attr,
662 char *buf)
663{
664 struct ctlr_info *h = to_hba(dev);
665
666 return snprintf(buf, 20, "%s\n",
667 h->transMethod & CFGTBL_Trans_Performant ?
668 "performant" : "simple");
669}
670static DEVICE_ATTR(transport_mode, S_IRUGO, host_show_transport_mode, NULL);
671
7fe06326
AP		 672static ssize_t dev_show_unique_id(struct device *dev,
673 struct device_attribute *attr,
674 char *buf)
675{
676 drive_info_struct *drv = to_drv(dev);
677 struct ctlr_info *h = to_hba(drv->dev.parent);
678 __u8 sn[16];
679 unsigned long flags;
680 int ret = 0;
681
f70dba83 682 spin_lock_irqsave(&h->lock, flags);
7fe06326
AP		 683 if (h->busy_configuring)
684 ret = -EBUSY;
685 else
686 memcpy(sn, drv->serial_no, sizeof(sn));
f70dba83 687 spin_unlock_irqrestore(&h->lock, flags);
7fe06326
AP		 688
689 if (ret)
690 return ret;
691 else
692 return snprintf(buf, 16 * 2 + 2,
693 "%02X%02X%02X%02X%02X%02X%02X%02X"
694 "%02X%02X%02X%02X%02X%02X%02X%02X\n",
695 sn[0], sn[1], sn[2], sn[3],
696 sn[4], sn[5], sn[6], sn[7],
697 sn[8], sn[9], sn[10], sn[11],
698 sn[12], sn[13], sn[14], sn[15]);
699}
8ba95c69 700static DEVICE_ATTR(unique_id, S_IRUGO, dev_show_unique_id, NULL);
7fe06326
AP		 701
702static ssize_t dev_show_vendor(struct device *dev,
703 struct device_attribute *attr,
704 char *buf)
705{
706 drive_info_struct *drv = to_drv(dev);
707 struct ctlr_info *h = to_hba(drv->dev.parent);
708 char vendor[VENDOR_LEN + 1];
709 unsigned long flags;
710 int ret = 0;
711
f70dba83 712 spin_lock_irqsave(&h->lock, flags);
7fe06326
AP		 713 if (h->busy_configuring)
714 ret = -EBUSY;
715 else
716 memcpy(vendor, drv->vendor, VENDOR_LEN + 1);
f70dba83 717 spin_unlock_irqrestore(&h->lock, flags);
7fe06326
AP		 718
719 if (ret)
720 return ret;
721 else
722 return snprintf(buf, sizeof(vendor) + 1, "%s\n", drv->vendor);
723}
8ba95c69 724static DEVICE_ATTR(vendor, S_IRUGO, dev_show_vendor, NULL);
7fe06326
AP		 725
726static ssize_t dev_show_model(struct device *dev,
727 struct device_attribute *attr,
728 char *buf)
729{
730 drive_info_struct *drv = to_drv(dev);
731 struct ctlr_info *h = to_hba(drv->dev.parent);
732 char model[MODEL_LEN + 1];
733 unsigned long flags;
734 int ret = 0;
735
f70dba83 736 spin_lock_irqsave(&h->lock, flags);
7fe06326
AP		 737 if (h->busy_configuring)
738 ret = -EBUSY;
739 else
740 memcpy(model, drv->model, MODEL_LEN + 1);
f70dba83 741 spin_unlock_irqrestore(&h->lock, flags);
7fe06326
AP		 742
743 if (ret)
744 return ret;
745 else
746 return snprintf(buf, sizeof(model) + 1, "%s\n", drv->model);
747}
8ba95c69 748static DEVICE_ATTR(model, S_IRUGO, dev_show_model, NULL);
7fe06326
AP		 749
750static ssize_t dev_show_rev(struct device *dev,
751 struct device_attribute *attr,
752 char *buf)
753{
754 drive_info_struct *drv = to_drv(dev);
755 struct ctlr_info *h = to_hba(drv->dev.parent);
756 char rev[REV_LEN + 1];
757 unsigned long flags;
758 int ret = 0;
759
f70dba83 760 spin_lock_irqsave(&h->lock, flags);
7fe06326
AP		 761 if (h->busy_configuring)
762 ret = -EBUSY;
763 else
764 memcpy(rev, drv->rev, REV_LEN + 1);
f70dba83 765 spin_unlock_irqrestore(&h->lock, flags);
7fe06326
AP		 766
767 if (ret)
768 return ret;
769 else
770 return snprintf(buf, sizeof(rev) + 1, "%s\n", drv->rev);
771}
8ba95c69 772static DEVICE_ATTR(rev, S_IRUGO, dev_show_rev, NULL);
7fe06326 773
ce84a8ae
SC		 774static ssize_t cciss_show_lunid(struct device *dev,
775 struct device_attribute *attr, char *buf)
776{
9cef0d2f
SC		 777 drive_info_struct *drv = to_drv(dev);
778 struct ctlr_info *h = to_hba(drv->dev.parent);
ce84a8ae
SC		 779 unsigned long flags;
780 unsigned char lunid[8];
781
f70dba83 782 spin_lock_irqsave(&h->lock, flags);
ce84a8ae 783 if (h->busy_configuring) {
f70dba83 784 spin_unlock_irqrestore(&h->lock, flags);
ce84a8ae
SC		 785 return -EBUSY;
786 }
787 if (!drv->heads) {
f70dba83 788 spin_unlock_irqrestore(&h->lock, flags);
ce84a8ae
SC		 789 return -ENOTTY;
790 }
791 memcpy(lunid, drv->LunID, sizeof(lunid));
f70dba83 792 spin_unlock_irqrestore(&h->lock, flags);
ce84a8ae
SC		 793 return snprintf(buf, 20, "0x%02x%02x%02x%02x%02x%02x%02x%02x\n",
794 lunid[0], lunid[1], lunid[2], lunid[3],
795 lunid[4], lunid[5], lunid[6], lunid[7]);
796}
8ba95c69 797static DEVICE_ATTR(lunid, S_IRUGO, cciss_show_lunid, NULL);
ce84a8ae 798
3ff1111d
SC		 799static ssize_t cciss_show_raid_level(struct device *dev,
800 struct device_attribute *attr, char *buf)
801{
9cef0d2f
SC		 802 drive_info_struct *drv = to_drv(dev);
803 struct ctlr_info *h = to_hba(drv->dev.parent);
3ff1111d
SC		 804 int raid;
805 unsigned long flags;
806
f70dba83 807 spin_lock_irqsave(&h->lock, flags);
3ff1111d 808 if (h->busy_configuring) {
f70dba83 809 spin_unlock_irqrestore(&h->lock, flags);
3ff1111d
SC		 810 return -EBUSY;
811 }
812 raid = drv->raid_level;
f70dba83 813 spin_unlock_irqrestore(&h->lock, flags);
3ff1111d
SC		 814 if (raid < 0 || raid > RAID_UNKNOWN)
815 raid = RAID_UNKNOWN;
816
817 return snprintf(buf, strlen(raid_label[raid]) + 7, "RAID %s\n",
818 raid_label[raid]);
819}
8ba95c69 820static DEVICE_ATTR(raid_level, S_IRUGO, cciss_show_raid_level, NULL);
3ff1111d 821
e272afec
SC		 822static ssize_t cciss_show_usage_count(struct device *dev,
823 struct device_attribute *attr, char *buf)
824{
9cef0d2f
SC		 825 drive_info_struct *drv = to_drv(dev);
826 struct ctlr_info *h = to_hba(drv->dev.parent);
e272afec
SC		 827 unsigned long flags;
828 int count;
829
f70dba83 830 spin_lock_irqsave(&h->lock, flags);
e272afec 831 if (h->busy_configuring) {
f70dba83 832 spin_unlock_irqrestore(&h->lock, flags);
e272afec
SC		 833 return -EBUSY;
834 }
835 count = drv->usage_count;
f70dba83 836 spin_unlock_irqrestore(&h->lock, flags);
e272afec
SC		 837 return snprintf(buf, 20, "%d\n", count);
838}
8ba95c69 839static DEVICE_ATTR(usage_count, S_IRUGO, cciss_show_usage_count, NULL);
e272afec 840
d6f4965d
AP		 841static struct attribute *cciss_host_attrs[] = {
842 &dev_attr_rescan.attr,
957c2ec5 843 &dev_attr_resettable.attr,
f963d270 844 &dev_attr_transport_mode.attr,
d6f4965d
AP		 845 NULL
846};
847
848static struct attribute_group cciss_host_attr_group = {
849 .attrs = cciss_host_attrs,
850};
851
9f792d9f 852static const struct attribute_group *cciss_host_attr_groups[] = {
d6f4965d
AP		 853 &cciss_host_attr_group,
854 NULL
855};
856
857static struct device_type cciss_host_type = {
858 .name = "cciss_host",
859 .groups = cciss_host_attr_groups,
617e1344 860 .release = cciss_hba_release,
d6f4965d
AP		 861};
862
7fe06326
AP		 863static struct attribute *cciss_dev_attrs[] = {
864 &dev_attr_unique_id.attr,
865 &dev_attr_model.attr,
866 &dev_attr_vendor.attr,
867 &dev_attr_rev.attr,
ce84a8ae 868 &dev_attr_lunid.attr,
3ff1111d 869 &dev_attr_raid_level.attr,
e272afec 870 &dev_attr_usage_count.attr,
7fe06326
AP		 871 NULL
872};
873
874static struct attribute_group cciss_dev_attr_group = {
875 .attrs = cciss_dev_attrs,
876};
877
a4dbd674 878static const struct attribute_group *cciss_dev_attr_groups[] = {
7fe06326
AP		 879 &cciss_dev_attr_group,
880 NULL
881};
882
883static struct device_type cciss_dev_type = {
884 .name = "cciss_device",
885 .groups = cciss_dev_attr_groups,
617e1344 886 .release = cciss_device_release,
7fe06326
AP		 887};
888
889static struct bus_type cciss_bus_type = {
890 .name = "cciss",
891};
892
617e1344
SC		 893/*
894 * cciss_hba_release is called when the reference count
895 * of h->dev goes to zero.
896 */
897static void cciss_hba_release(struct device *dev)
898{
899 /*
900 * nothing to do, but need this to avoid a warning
901 * about not having a release handler from lib/kref.c.
902 */
903}
7fe06326
AP		 904
905/*
906 * Initialize sysfs entry for each controller. This sets up and registers
907 * the 'cciss#' directory for each individual controller under
908 * /sys/bus/pci/devices/<dev>/.
909 */
910static int cciss_create_hba_sysfs_entry(struct ctlr_info *h)
911{
912 device_initialize(&h->dev);
913 h->dev.type = &cciss_host_type;
914 h->dev.bus = &cciss_bus_type;
915 dev_set_name(&h->dev, "%s", h->devname);
916 h->dev.parent = &h->pdev->dev;
917
918 return device_add(&h->dev);
919}
920
921/*
922 * Remove sysfs entries for an hba.
923 */
924static void cciss_destroy_hba_sysfs_entry(struct ctlr_info *h)
925{
926 device_del(&h->dev);
617e1344
SC		 927 put_device(&h->dev); /* final put. */
928}
929
930/* cciss_device_release is called when the reference count
9cef0d2f 931 * of h->drv[x]dev goes to zero.
617e1344
SC		 932 */
933static void cciss_device_release(struct device *dev)
934{
9cef0d2f
SC		 935 drive_info_struct *drv = to_drv(dev);
936 kfree(drv);
7fe06326
AP		 937}
938
939/*
940 * Initialize sysfs for each logical drive. This sets up and registers
941 * the 'c#d#' directory for each individual logical drive under
942 * /sys/bus/pci/devices/<dev/ccis#/. We also create a link from
943 * /sys/block/cciss!c#d# to this entry.
944 */
617e1344 945static long cciss_create_ld_sysfs_entry(struct ctlr_info *h,
7fe06326
AP		 946 int drv_index)
947{
617e1344
SC		 948 struct device *dev;
949
9cef0d2f 950 if (h->drv[drv_index]->device_initialized)
8ce51966
SC		 951 return 0;
952
9cef0d2f 953 dev = &h->drv[drv_index]->dev;
617e1344
SC		 954 device_initialize(dev);
955 dev->type = &cciss_dev_type;
956 dev->bus = &cciss_bus_type;
957 dev_set_name(dev, "c%dd%d", h->ctlr, drv_index);
958 dev->parent = &h->dev;
9cef0d2f 959 h->drv[drv_index]->device_initialized = 1;
617e1344 960 return device_add(dev);
7fe06326
AP		 961}
962
963/*
964 * Remove sysfs entries for a logical drive.
965 */
8ce51966
SC		 966static void cciss_destroy_ld_sysfs_entry(struct ctlr_info *h, int drv_index,
967 int ctlr_exiting)
7fe06326 968{
9cef0d2f 969 struct device *dev = &h->drv[drv_index]->dev;
8ce51966
SC		 970
971 /* special case for c*d0, we only destroy it on controller exit */
972 if (drv_index == 0 && !ctlr_exiting)
973 return;
974
617e1344
SC		 975 device_del(dev);
976 put_device(dev); /* the "final" put. */
9cef0d2f 977 h->drv[drv_index] = NULL;
7fe06326
AP		 978}
979
7c832835
BH		 980/*
981 * For operations that cannot sleep, a command block is allocated at init,
1da177e4 982 * and managed by cmd_alloc() and cmd_free() using a simple bitmap to track
6b4d96b8 983 * which ones are free or in use.
7c832835 984 */
6b4d96b8 985static CommandList_struct *cmd_alloc(ctlr_info_t *h)
1da177e4
LT		 986{
987 CommandList_struct *c;
7c832835 988 int i;
1da177e4
LT		 989 u64bit temp64;
990 dma_addr_t cmd_dma_handle, err_dma_handle;
991
6b4d96b8
SC		 992 do {
993 i = find_first_zero_bit(h->cmd_pool_bits, h->nr_cmds);
994 if (i == h->nr_cmds)
7c832835 995 return NULL;
1f118bc4 996 } while (test_and_set_bit(i, h->cmd_pool_bits) != 0);
6b4d96b8
SC		 997 c = h->cmd_pool + i;
998 memset(c, 0, sizeof(CommandList_struct));
999 cmd_dma_handle = h->cmd_pool_dhandle + i * sizeof(CommandList_struct);
1000 c->err_info = h->errinfo_pool + i;
1001 memset(c->err_info, 0, sizeof(ErrorInfo_struct));
1002 err_dma_handle = h->errinfo_pool_dhandle
1003 + i * sizeof(ErrorInfo_struct);
1004 h->nr_allocs++;
1da177e4 1005
6b4d96b8 1006 c->cmdindex = i;
33079b21 1007
e6e1ee93 1008 INIT_LIST_HEAD(&c->list);
6b4d96b8
SC		 1009 c->busaddr = (__u32) cmd_dma_handle;
1010 temp64.val = (__u64) err_dma_handle;
1011 c->ErrDesc.Addr.lower = temp64.val32.lower;
1012 c->ErrDesc.Addr.upper = temp64.val32.upper;
1013 c->ErrDesc.Len = sizeof(ErrorInfo_struct);
7c832835 1014
6b4d96b8
SC		 1015 c->ctlr = h->ctlr;
1016 return c;
1017}
33079b21 1018
6b4d96b8
SC		 1019/* allocate a command using pci_alloc_consistent, used for ioctls,
1020 * etc., not for the main i/o path.
1021 */
1022static CommandList_struct *cmd_special_alloc(ctlr_info_t *h)
1023{
1024 CommandList_struct *c;
1025 u64bit temp64;
1026 dma_addr_t cmd_dma_handle, err_dma_handle;
1027
a5bbf616
JP		 1028 c = pci_zalloc_consistent(h->pdev, sizeof(CommandList_struct),
1029 &cmd_dma_handle);
6b4d96b8
SC		 1030 if (c == NULL)
1031 return NULL;
6b4d96b8
SC		 1032
1033 c->cmdindex = -1;
1034
a5bbf616
JP		 1035 c->err_info = pci_zalloc_consistent(h->pdev, sizeof(ErrorInfo_struct),
1036 &err_dma_handle);
6b4d96b8
SC		 1037
1038 if (c->err_info == NULL) {
1039 pci_free_consistent(h->pdev,
1040 sizeof(CommandList_struct), c, cmd_dma_handle);
1041 return NULL;
7c832835 1042 }
1da177e4 1043
e6e1ee93 1044 INIT_LIST_HEAD(&c->list);
1da177e4 1045 c->busaddr = (__u32) cmd_dma_handle;
7c832835 1046 temp64.val = (__u64) err_dma_handle;
1da177e4
LT		 1047 c->ErrDesc.Addr.lower = temp64.val32.lower;
1048 c->ErrDesc.Addr.upper = temp64.val32.upper;
1049 c->ErrDesc.Len = sizeof(ErrorInfo_struct);
1da177e4 1050
7c832835
BH		 1051 c->ctlr = h->ctlr;
1052 return c;
1da177e4
LT		 1053}
1054
6b4d96b8 1055static void cmd_free(ctlr_info_t *h, CommandList_struct *c)
1da177e4
LT		 1056{
1057 int i;
6b4d96b8
SC		 1058
1059 i = c - h->cmd_pool;
1f118bc4 1060 clear_bit(i, h->cmd_pool_bits);
6b4d96b8
SC		 1061 h->nr_frees++;
1062}
1063
1064static void cmd_special_free(ctlr_info_t *h, CommandList_struct *c)
1065{
1da177e4
LT		 1066 u64bit temp64;
1067
6b4d96b8
SC		 1068 temp64.val32.lower = c->ErrDesc.Addr.lower;
1069 temp64.val32.upper = c->ErrDesc.Addr.upper;
1070 pci_free_consistent(h->pdev, sizeof(ErrorInfo_struct),
1071 c->err_info, (dma_addr_t) temp64.val);
16011131
SC		 1072 pci_free_consistent(h->pdev, sizeof(CommandList_struct), c,
1073 (dma_addr_t) cciss_tag_discard_error_bits(h, (u32) c->busaddr));
1da177e4
LT		 1074}
1075
1076static inline ctlr_info_t *get_host(struct gendisk *disk)
1077{
7c832835 1078 return disk->queue->queuedata;
1da177e4
LT		 1079}
1080
1081static inline drive_info_struct *get_drv(struct gendisk *disk)
1082{
1083 return disk->private_data;
1084}
1085
1086/*
1087 * Open. Make sure the device is really there.
1088 */
ef7822c2 1089static int cciss_open(struct block_device *bdev, fmode_t mode)
1da177e4 1090{
f70dba83 1091 ctlr_info_t *h = get_host(bdev->bd_disk);
ef7822c2 1092 drive_info_struct *drv = get_drv(bdev->bd_disk);
1da177e4 1093
b2a4a43d 1094 dev_dbg(&h->pdev->dev, "cciss_open %s\n", bdev->bd_disk->disk_name);
2e043986 1095 if (drv->busy_configuring)
ddd47442 1096 return -EBUSY;
1da177e4
LT		 1097 /*
1098 * Root is allowed to open raw volume zero even if it's not configured
1099 * so array config can still work. Root is also allowed to open any
1100 * volume that has a LUN ID, so it can issue IOCTL to reread the
1101 * disk information. I don't think I really like this
1102 * but I'm already using way to many device nodes to claim another one
1103 * for "raw controller".
1104 */
7a06f789 1105 if (drv->heads == 0) {
ef7822c2 1106 if (MINOR(bdev->bd_dev) != 0) { /* not node 0? */
1da177e4 1107 /* if not node 0 make sure it is a partition = 0 */
ef7822c2 1108 if (MINOR(bdev->bd_dev) & 0x0f) {
7c832835 1109 return -ENXIO;
1da177e4 1110 /* if it is, make sure we have a LUN ID */
39ccf9a6
SC		 1111 } else if (memcmp(drv->LunID, CTLR_LUNID,
1112 sizeof(drv->LunID))) {
1da177e4
LT		 1113 return -ENXIO;
1114 }
1115 }
1116 if (!capable(CAP_SYS_ADMIN))
1117 return -EPERM;
1118 }
1119 drv->usage_count++;
f70dba83 1120 h->usage_count++;
1da177e4
LT		 1121 return 0;
1122}
7c832835 1123
6e9624b8
AB		 1124static int cciss_unlocked_open(struct block_device *bdev, fmode_t mode)
1125{
1126 int ret;
1127
2a48fc0a 1128 mutex_lock(&cciss_mutex);
6e9624b8 1129 ret = cciss_open(bdev, mode);
2a48fc0a 1130 mutex_unlock(&cciss_mutex);
6e9624b8
AB		 1131
1132 return ret;
1133}
1134
1da177e4
LT		 1135/*
1136 * Close. Sync first.
1137 */
db2a144b 1138static void cciss_release(struct gendisk *disk, fmode_t mode)
1da177e4 1139{
f70dba83 1140 ctlr_info_t *h;
6e9624b8 1141 drive_info_struct *drv;
1da177e4 1142
2a48fc0a 1143 mutex_lock(&cciss_mutex);
f70dba83 1144 h = get_host(disk);
6e9624b8 1145 drv = get_drv(disk);
b2a4a43d 1146 dev_dbg(&h->pdev->dev, "cciss_release %s\n", disk->disk_name);
1da177e4 1147 drv->usage_count--;
f70dba83 1148 h->usage_count--;
2a48fc0a 1149 mutex_unlock(&cciss_mutex);
1da177e4
LT		 1150}
1151
8a6cfeb6
AB		 1152#ifdef CONFIG_COMPAT
1153
ef7822c2
AV		 1154static int cciss_ioctl32_passthru(struct block_device *bdev, fmode_t mode,
1155 unsigned cmd, unsigned long arg);
1156static int cciss_ioctl32_big_passthru(struct block_device *bdev, fmode_t mode,
1157 unsigned cmd, unsigned long arg);
1da177e4 1158
ef7822c2
AV		 1159static int cciss_compat_ioctl(struct block_device *bdev, fmode_t mode,
1160 unsigned cmd, unsigned long arg)
1da177e4
LT		 1161{
1162 switch (cmd) {
1163 case CCISS_GETPCIINFO:
1164 case CCISS_GETINTINFO:
1165 case CCISS_SETINTINFO:
1166 case CCISS_GETNODENAME:
1167 case CCISS_SETNODENAME:
1168 case CCISS_GETHEARTBEAT:
1169 case CCISS_GETBUSTYPES:
1170 case CCISS_GETFIRMVER:
1171 case CCISS_GETDRIVVER:
1172 case CCISS_REVALIDVOLS:
1173 case CCISS_DEREGDISK:
1174 case CCISS_REGNEWDISK:
1175 case CCISS_REGNEWD:
1176 case CCISS_RESCANDISK:
1177 case CCISS_GETLUNINFO:
03f47e88 1178 return cciss_ioctl(bdev, mode, cmd, arg);
1da177e4
LT		 1179
1180 case CCISS_PASSTHRU32:
ef7822c2 1181 return cciss_ioctl32_passthru(bdev, mode, cmd, arg);
1da177e4 1182 case CCISS_BIG_PASSTHRU32:
ef7822c2 1183 return cciss_ioctl32_big_passthru(bdev, mode, cmd, arg);
1da177e4
LT		 1184
1185 default:
1186 return -ENOIOCTLCMD;
1187 }
1188}
1189
ef7822c2
AV		 1190static int cciss_ioctl32_passthru(struct block_device *bdev, fmode_t mode,
1191 unsigned cmd, unsigned long arg)
1da177e4
LT		 1192{
1193 IOCTL32_Command_struct __user *arg32 =
7c832835 1194 (IOCTL32_Command_struct __user *) arg;
1da177e4
LT		 1195 IOCTL_Command_struct arg64;
1196 IOCTL_Command_struct __user *p = compat_alloc_user_space(sizeof(arg64));
1197 int err;
1198 u32 cp;
1199
58f09e00 1200 memset(&arg64, 0, sizeof(arg64));
1da177e4 1201 err = 0;
7c832835
BH		 1202 err |=
1203 copy_from_user(&arg64.LUN_info, &arg32->LUN_info,
1204 sizeof(arg64.LUN_info));
1205 err |=
1206 copy_from_user(&arg64.Request, &arg32->Request,
1207 sizeof(arg64.Request));
1208 err |=
1209 copy_from_user(&arg64.error_info, &arg32->error_info,
1210 sizeof(arg64.error_info));
1da177e4
LT		 1211 err |= get_user(arg64.buf_size, &arg32->buf_size);
1212 err |= get_user(cp, &arg32->buf);
1213 arg64.buf = compat_ptr(cp);
1214 err |= copy_to_user(p, &arg64, sizeof(arg64));
1215
1216 if (err)
1217 return -EFAULT;
1218
03f47e88 1219 err = cciss_ioctl(bdev, mode, CCISS_PASSTHRU, (unsigned long)p);
1da177e4
LT		 1220 if (err)
1221 return err;
7c832835
BH		 1222 err |=
1223 copy_in_user(&arg32->error_info, &p->error_info,
1224 sizeof(arg32->error_info));
1da177e4
LT		 1225 if (err)
1226 return -EFAULT;
1227 return err;
1228}
1229
ef7822c2
AV		 1230static int cciss_ioctl32_big_passthru(struct block_device *bdev, fmode_t mode,
1231 unsigned cmd, unsigned long arg)
1da177e4
LT		 1232{
1233 BIG_IOCTL32_Command_struct __user *arg32 =
7c832835 1234 (BIG_IOCTL32_Command_struct __user *) arg;
1da177e4 1235 BIG_IOCTL_Command_struct arg64;
7c832835
BH		 1236 BIG_IOCTL_Command_struct __user *p =
1237 compat_alloc_user_space(sizeof(arg64));
1da177e4
LT		 1238 int err;
1239 u32 cp;
1240
7ab5118d 1241 memset(&arg64, 0, sizeof(arg64));
1da177e4 1242 err = 0;
7c832835
BH		 1243 err |=
1244 copy_from_user(&arg64.LUN_info, &arg32->LUN_info,
1245 sizeof(arg64.LUN_info));
1246 err |=
1247 copy_from_user(&arg64.Request, &arg32->Request,
1248 sizeof(arg64.Request));
1249 err |=
1250 copy_from_user(&arg64.error_info, &arg32->error_info,
1251 sizeof(arg64.error_info));
1da177e4
LT		 1252 err |= get_user(arg64.buf_size, &arg32->buf_size);
1253 err |= get_user(arg64.malloc_size, &arg32->malloc_size);
1254 err |= get_user(cp, &arg32->buf);
1255 arg64.buf = compat_ptr(cp);
1256 err |= copy_to_user(p, &arg64, sizeof(arg64));
1257
1258 if (err)
7c832835 1259 return -EFAULT;
1da177e4 1260
03f47e88 1261 err = cciss_ioctl(bdev, mode, CCISS_BIG_PASSTHRU, (unsigned long)p);
1da177e4
LT		 1262 if (err)
1263 return err;
7c832835
BH		 1264 err |=
1265 copy_in_user(&arg32->error_info, &p->error_info,
1266 sizeof(arg32->error_info));
1da177e4
LT		 1267 if (err)
1268 return -EFAULT;
1269 return err;
1270}
1271#endif
a885c8c4
CH		 1272
1273static int cciss_getgeo(struct block_device *bdev, struct hd_geometry *geo)
1274{
1275 drive_info_struct *drv = get_drv(bdev->bd_disk);
1276
1277 if (!drv->cylinders)
1278 return -ENXIO;
1279
1280 geo->heads = drv->heads;
1281 geo->sectors = drv->sectors;
1282 geo->cylinders = drv->cylinders;
1283 return 0;
1284}
1285
f70dba83 1286static void check_ioctl_unit_attention(ctlr_info_t *h, CommandList_struct *c)
0a9279cc
MM		 1287{
1288 if (c->err_info->CommandStatus == CMD_TARGET_STATUS &&
1289 c->err_info->ScsiStatus != SAM_STAT_CHECK_CONDITION)
f70dba83 1290 (void)check_for_unit_attention(h, c);
0a9279cc 1291}
0a25a5ae
SC		 1292
1293static int cciss_getpciinfo(ctlr_info_t *h, void __user *argp)
1da177e4 1294{
0a25a5ae 1295 cciss_pci_info_struct pciinfo;
1da177e4 1296
0a25a5ae
SC		 1297 if (!argp)
1298 return -EINVAL;
1299 pciinfo.domain = pci_domain_nr(h->pdev->bus);
1300 pciinfo.bus = h->pdev->bus->number;
1301 pciinfo.dev_fn = h->pdev->devfn;
1302 pciinfo.board_id = h->board_id;
1303 if (copy_to_user(argp, &pciinfo, sizeof(cciss_pci_info_struct)))
1304 return -EFAULT;
1305 return 0;
1306}
1da177e4 1307
576e661c
SC		 1308static int cciss_getintinfo(ctlr_info_t *h, void __user *argp)
1309{
1310 cciss_coalint_struct intinfo;
03f47e88 1311 unsigned long flags;
1da177e4 1312
576e661c
SC		 1313 if (!argp)
1314 return -EINVAL;
03f47e88 1315 spin_lock_irqsave(&h->lock, flags);
576e661c
SC		 1316 intinfo.delay = readl(&h->cfgtable->HostWrite.CoalIntDelay);
1317 intinfo.count = readl(&h->cfgtable->HostWrite.CoalIntCount);
03f47e88 1318 spin_unlock_irqrestore(&h->lock, flags);
576e661c
SC		 1319 if (copy_to_user
1320 (argp, &intinfo, sizeof(cciss_coalint_struct)))
1321 return -EFAULT;
1322 return 0;
1323}
1da177e4 1324
4c800eed
SC		 1325static int cciss_setintinfo(ctlr_info_t *h, void __user *argp)
1326{
1327 cciss_coalint_struct intinfo;
1328 unsigned long flags;
1329 int i;
1da177e4 1330
4c800eed
SC		 1331 if (!argp)
1332 return -EINVAL;
1333 if (!capable(CAP_SYS_ADMIN))
1334 return -EPERM;
1335 if (copy_from_user(&intinfo, argp, sizeof(intinfo)))
1336 return -EFAULT;
1337 if ((intinfo.delay == 0) && (intinfo.count == 0))
1338 return -EINVAL;
1339 spin_lock_irqsave(&h->lock, flags);
1340 /* Update the field, and then ring the doorbell */
1341 writel(intinfo.delay, &(h->cfgtable->HostWrite.CoalIntDelay));
1342 writel(intinfo.count, &(h->cfgtable->HostWrite.CoalIntCount));
1343 writel(CFGTBL_ChangeReq, h->vaddr + SA5_DOORBELL);
1344
1345 for (i = 0; i < MAX_IOCTL_CONFIG_WAIT; i++) {
1346 if (!(readl(h->vaddr + SA5_DOORBELL) & CFGTBL_ChangeReq))
1347 break;
1348 udelay(1000); /* delay and try again */
1349 }
1350 spin_unlock_irqrestore(&h->lock, flags);
1351 if (i >= MAX_IOCTL_CONFIG_WAIT)
1352 return -EAGAIN;
1353 return 0;
1354}
1da177e4 1355
25216109
SC		 1356static int cciss_getnodename(ctlr_info_t *h, void __user *argp)
1357{
1358 NodeName_type NodeName;
03f47e88 1359 unsigned long flags;
25216109 1360 int i;
1da177e4 1361
25216109
SC		 1362 if (!argp)
1363 return -EINVAL;
03f47e88 1364 spin_lock_irqsave(&h->lock, flags);
25216109
SC		 1365 for (i = 0; i < 16; i++)
1366 NodeName[i] = readb(&h->cfgtable->ServerName[i]);
03f47e88 1367 spin_unlock_irqrestore(&h->lock, flags);
25216109
SC		 1368 if (copy_to_user(argp, NodeName, sizeof(NodeName_type)))
1369 return -EFAULT;
1370 return 0;
1371}
7c832835 1372
4f43f32c
SC		 1373static int cciss_setnodename(ctlr_info_t *h, void __user *argp)
1374{
1375 NodeName_type NodeName;
1376 unsigned long flags;
1377 int i;
7c832835 1378
4f43f32c
SC		 1379 if (!argp)
1380 return -EINVAL;
1381 if (!capable(CAP_SYS_ADMIN))
1382 return -EPERM;
1383 if (copy_from_user(NodeName, argp, sizeof(NodeName_type)))
1384 return -EFAULT;
1385 spin_lock_irqsave(&h->lock, flags);
1386 /* Update the field, and then ring the doorbell */
1387 for (i = 0; i < 16; i++)
1388 writeb(NodeName[i], &h->cfgtable->ServerName[i]);
1389 writel(CFGTBL_ChangeReq, h->vaddr + SA5_DOORBELL);
1390 for (i = 0; i < MAX_IOCTL_CONFIG_WAIT; i++) {
1391 if (!(readl(h->vaddr + SA5_DOORBELL) & CFGTBL_ChangeReq))
1392 break;
1393 udelay(1000); /* delay and try again */
1394 }
1395 spin_unlock_irqrestore(&h->lock, flags);
1396 if (i >= MAX_IOCTL_CONFIG_WAIT)
1397 return -EAGAIN;
1398 return 0;
1399}
7c832835 1400
93c74931
SC		 1401static int cciss_getheartbeat(ctlr_info_t *h, void __user *argp)
1402{
1403 Heartbeat_type heartbeat;
03f47e88 1404 unsigned long flags;
7c832835 1405
93c74931
SC		 1406 if (!argp)
1407 return -EINVAL;
03f47e88 1408 spin_lock_irqsave(&h->lock, flags);
93c74931 1409 heartbeat = readl(&h->cfgtable->HeartBeat);
03f47e88 1410 spin_unlock_irqrestore(&h->lock, flags);
93c74931
SC		 1411 if (copy_to_user(argp, &heartbeat, sizeof(Heartbeat_type)))
1412 return -EFAULT;
1413 return 0;
1414}
0a9279cc 1415
d18dfad4
SC		 1416static int cciss_getbustypes(ctlr_info_t *h, void __user *argp)
1417{
1418 BusTypes_type BusTypes;
03f47e88 1419 unsigned long flags;
7c832835 1420
d18dfad4
SC		 1421 if (!argp)
1422 return -EINVAL;
03f47e88 1423 spin_lock_irqsave(&h->lock, flags);
d18dfad4 1424 BusTypes = readl(&h->cfgtable->BusTypes);
03f47e88 1425 spin_unlock_irqrestore(&h->lock, flags);
d18dfad4
SC		 1426 if (copy_to_user(argp, &BusTypes, sizeof(BusTypes_type)))
1427 return -EFAULT;
1428 return 0;
1429}
1430
8a4f7fbf
SC		 1431static int cciss_getfirmver(ctlr_info_t *h, void __user *argp)
1432{
1433 FirmwareVer_type firmware;
1434
1435 if (!argp)
1436 return -EINVAL;
1437 memcpy(firmware, h->firm_ver, 4);
1438
1439 if (copy_to_user
1440 (argp, firmware, sizeof(FirmwareVer_type)))
1441 return -EFAULT;
1442 return 0;
1443}
1444
c525919d
SC		 1445static int cciss_getdrivver(ctlr_info_t *h, void __user *argp)
1446{
1447 DriverVer_type DriverVer = DRIVER_VERSION;
1448
1449 if (!argp)
1450 return -EINVAL;
1451 if (copy_to_user(argp, &DriverVer, sizeof(DriverVer_type)))
1452 return -EFAULT;
1453 return 0;
1454}
1455
0894b32c
SC		 1456static int cciss_getluninfo(ctlr_info_t *h,
1457 struct gendisk *disk, void __user *argp)
1458{
1459 LogvolInfo_struct luninfo;
1460 drive_info_struct *drv = get_drv(disk);
1461
1462 if (!argp)
1463 return -EINVAL;
1464 memcpy(&luninfo.LunID, drv->LunID, sizeof(luninfo.LunID));
1465 luninfo.num_opens = drv->usage_count;
1466 luninfo.num_parts = 0;
1467 if (copy_to_user(argp, &luninfo, sizeof(LogvolInfo_struct)))
1468 return -EFAULT;
1469 return 0;
1470}
1471
f32f125b
SC		 1472static int cciss_passthru(ctlr_info_t *h, void __user *argp)
1473{
1474 IOCTL_Command_struct iocommand;
1475 CommandList_struct *c;
1476 char *buff = NULL;
1477 u64bit temp64;
1478 DECLARE_COMPLETION_ONSTACK(wait);
1479
1480 if (!argp)
1481 return -EINVAL;
1482
1483 if (!capable(CAP_SYS_RAWIO))
1484 return -EPERM;
1485
1486 if (copy_from_user
1487 (&iocommand, argp, sizeof(IOCTL_Command_struct)))
1488 return -EFAULT;
1489 if ((iocommand.buf_size < 1) &&
1490 (iocommand.Request.Type.Direction != XFER_NONE)) {
1491 return -EINVAL;
1492 }
1493 if (iocommand.buf_size > 0) {
1494 buff = kmalloc(iocommand.buf_size, GFP_KERNEL);
1495 if (buff == NULL)
1496 return -EFAULT;
1497 }
1498 if (iocommand.Request.Type.Direction == XFER_WRITE) {
1499 /* Copy the data into the buffer we created */
1500 if (copy_from_user(buff, iocommand.buf, iocommand.buf_size)) {
1501 kfree(buff);
1502 return -EFAULT;
1503 }
1504 } else {
1505 memset(buff, 0, iocommand.buf_size);
1506 }
1507 c = cmd_special_alloc(h);
1508 if (!c) {
1509 kfree(buff);
1510 return -ENOMEM;
1511 }
1512 /* Fill in the command type */
1513 c->cmd_type = CMD_IOCTL_PEND;
1514 /* Fill in Command Header */
1515 c->Header.ReplyQueue = 0; /* unused in simple mode */
1516 if (iocommand.buf_size > 0) { /* buffer to fill */
1517 c->Header.SGList = 1;
1518 c->Header.SGTotal = 1;
1519 } else { /* no buffers to fill */
1520 c->Header.SGList = 0;
1521 c->Header.SGTotal = 0;
1522 }
1523 c->Header.LUN = iocommand.LUN_info;
1524 /* use the kernel address the cmd block for tag */
1525 c->Header.Tag.lower = c->busaddr;
1526
1527 /* Fill in Request block */
1528 c->Request = iocommand.Request;
1529
1530 /* Fill in the scatter gather information */
1531 if (iocommand.buf_size > 0) {
1532 temp64.val = pci_map_single(h->pdev, buff,
1533 iocommand.buf_size, PCI_DMA_BIDIRECTIONAL);
1534 c->SG[0].Addr.lower = temp64.val32.lower;
1535 c->SG[0].Addr.upper = temp64.val32.upper;
1536 c->SG[0].Len = iocommand.buf_size;
1537 c->SG[0].Ext = 0; /* we are not chaining */
1538 }
1539 c->waiting = &wait;
1540
1541 enqueue_cmd_and_start_io(h, c);
1542 wait_for_completion(&wait);
1543
1544 /* unlock the buffers from DMA */
1545 temp64.val32.lower = c->SG[0].Addr.lower;
1546 temp64.val32.upper = c->SG[0].Addr.upper;
1547 pci_unmap_single(h->pdev, (dma_addr_t) temp64.val, iocommand.buf_size,
1548 PCI_DMA_BIDIRECTIONAL);
1549 check_ioctl_unit_attention(h, c);
1550
1551 /* Copy the error information out */
1552 iocommand.error_info = *(c->err_info);
1553 if (copy_to_user(argp, &iocommand, sizeof(IOCTL_Command_struct))) {
1554 kfree(buff);
1555 cmd_special_free(h, c);
1556 return -EFAULT;
1557 }
1558
1559 if (iocommand.Request.Type.Direction == XFER_READ) {
1560 /* Copy the data out of the buffer we created */
1561 if (copy_to_user(iocommand.buf, buff, iocommand.buf_size)) {
7c832835 1562 kfree(buff);
6b4d96b8 1563 cmd_special_free(h, c);
f32f125b 1564 return -EFAULT;
1da177e4 1565 }
f32f125b
SC		 1566 }
1567 kfree(buff);
1568 cmd_special_free(h, c);
1569 return 0;
1570}
1571
0c9f5ba7
SC		 1572static int cciss_bigpassthru(ctlr_info_t *h, void __user *argp)
1573{
1574 BIG_IOCTL_Command_struct *ioc;
1575 CommandList_struct *c;
1576 unsigned char **buff = NULL;
1577 int *buff_size = NULL;
1578 u64bit temp64;
1579 BYTE sg_used = 0;
1580 int status = 0;
1581 int i;
1582 DECLARE_COMPLETION_ONSTACK(wait);
1583 __u32 left;
1584 __u32 sz;
1585 BYTE __user *data_ptr;
1586
1587 if (!argp)
1588 return -EINVAL;
1589 if (!capable(CAP_SYS_RAWIO))
1590 return -EPERM;
fcab1c11 1591 ioc = kmalloc(sizeof(*ioc), GFP_KERNEL);
0c9f5ba7
SC		 1592 if (!ioc) {
1593 status = -ENOMEM;
1594 goto cleanup1;
1595 }
1596 if (copy_from_user(ioc, argp, sizeof(*ioc))) {
1597 status = -EFAULT;
1598 goto cleanup1;
1599 }
1600 if ((ioc->buf_size < 1) &&
1601 (ioc->Request.Type.Direction != XFER_NONE)) {
1602 status = -EINVAL;
1603 goto cleanup1;
1604 }
1605 /* Check kmalloc limits using all SGs */
1606 if (ioc->malloc_size > MAX_KMALLOC_SIZE) {
1607 status = -EINVAL;
1608 goto cleanup1;
1609 }
1610 if (ioc->buf_size > ioc->malloc_size * MAXSGENTRIES) {
1611 status = -EINVAL;
1612 goto cleanup1;
1613 }
1614 buff = kzalloc(MAXSGENTRIES * sizeof(char *), GFP_KERNEL);
1615 if (!buff) {
1616 status = -ENOMEM;
1617 goto cleanup1;
1618 }
1619 buff_size = kmalloc(MAXSGENTRIES * sizeof(int), GFP_KERNEL);
1620 if (!buff_size) {
1621 status = -ENOMEM;
1622 goto cleanup1;
1623 }
1624 left = ioc->buf_size;
1625 data_ptr = ioc->buf;
1626 while (left) {
1627 sz = (left > ioc->malloc_size) ? ioc->malloc_size : left;
1628 buff_size[sg_used] = sz;
1629 buff[sg_used] = kmalloc(sz, GFP_KERNEL);
1630 if (buff[sg_used] == NULL) {
1631 status = -ENOMEM;
1632 goto cleanup1;
1633 }
1634 if (ioc->Request.Type.Direction == XFER_WRITE) {
1635 if (copy_from_user(buff[sg_used], data_ptr, sz)) {
7c832835
BH		 1636 status = -EFAULT;
1637 goto cleanup1;
1638 }
0c9f5ba7
SC		 1639 } else {
1640 memset(buff[sg_used], 0, sz);
1641 }
1642 left -= sz;
1643 data_ptr += sz;
1644 sg_used++;
1645 }
1646 c = cmd_special_alloc(h);
1647 if (!c) {
1648 status = -ENOMEM;
1649 goto cleanup1;
1650 }
1651 c->cmd_type = CMD_IOCTL_PEND;
1652 c->Header.ReplyQueue = 0;
fcfb5c0c
SC		 1653 c->Header.SGList = sg_used;
1654 c->Header.SGTotal = sg_used;
0c9f5ba7
SC		 1655 c->Header.LUN = ioc->LUN_info;
1656 c->Header.Tag.lower = c->busaddr;
1657
1658 c->Request = ioc->Request;
fcfb5c0c
SC		 1659 for (i = 0; i < sg_used; i++) {
1660 temp64.val = pci_map_single(h->pdev, buff[i], buff_size[i],
0c9f5ba7 1661 PCI_DMA_BIDIRECTIONAL);
fcfb5c0c
SC		 1662 c->SG[i].Addr.lower = temp64.val32.lower;
1663 c->SG[i].Addr.upper = temp64.val32.upper;
1664 c->SG[i].Len = buff_size[i];
1665 c->SG[i].Ext = 0; /* we are not chaining */
0c9f5ba7
SC		 1666 }
1667 c->waiting = &wait;
1668 enqueue_cmd_and_start_io(h, c);
1669 wait_for_completion(&wait);
1670 /* unlock the buffers from DMA */
1671 for (i = 0; i < sg_used; i++) {
1672 temp64.val32.lower = c->SG[i].Addr.lower;
1673 temp64.val32.upper = c->SG[i].Addr.upper;
1674 pci_unmap_single(h->pdev,
1675 (dma_addr_t) temp64.val, buff_size[i],
1676 PCI_DMA_BIDIRECTIONAL);
1677 }
1678 check_ioctl_unit_attention(h, c);
1679 /* Copy the error information out */
1680 ioc->error_info = *(c->err_info);
1681 if (copy_to_user(argp, ioc, sizeof(*ioc))) {
1682 cmd_special_free(h, c);
1683 status = -EFAULT;
1684 goto cleanup1;
1685 }
1686 if (ioc->Request.Type.Direction == XFER_READ) {
1687 /* Copy the data out of the buffer we created */
1688 BYTE __user *ptr = ioc->buf;
1689 for (i = 0; i < sg_used; i++) {
1690 if (copy_to_user(ptr, buff[i], buff_size[i])) {
6b4d96b8 1691 cmd_special_free(h, c);
7c832835
BH		 1692 status = -EFAULT;
1693 goto cleanup1;
1694 }
0c9f5ba7 1695 ptr += buff_size[i];
1da177e4 1696 }
0c9f5ba7
SC		 1697 }
1698 cmd_special_free(h, c);
1699 status = 0;
1700cleanup1:
1701 if (buff) {
1702 for (i = 0; i < sg_used; i++)
1703 kfree(buff[i]);
1704 kfree(buff);
1705 }
1706 kfree(buff_size);
1707 kfree(ioc);
1708 return status;
1709}
1710
ef7822c2 1711static int cciss_ioctl(struct block_device *bdev, fmode_t mode,
c525919d 1712 unsigned int cmd, unsigned long arg)
1da177e4 1713{
1da177e4 1714 struct gendisk *disk = bdev->bd_disk;
f70dba83 1715 ctlr_info_t *h = get_host(disk);
1da177e4
LT		 1716 void __user *argp = (void __user *)arg;
1717
b2a4a43d
SC		 1718 dev_dbg(&h->pdev->dev, "cciss_ioctl: Called with cmd=%x %lx\n",
1719 cmd, arg);
7c832835 1720 switch (cmd) {
1da177e4 1721 case CCISS_GETPCIINFO:
0a25a5ae 1722 return cciss_getpciinfo(h, argp);
1da177e4 1723 case CCISS_GETINTINFO:
576e661c 1724 return cciss_getintinfo(h, argp);
1da177e4 1725 case CCISS_SETINTINFO:
4c800eed 1726 return cciss_setintinfo(h, argp);
1da177e4 1727 case CCISS_GETNODENAME:
25216109 1728 return cciss_getnodename(h, argp);
1da177e4 1729 case CCISS_SETNODENAME:
4f43f32c 1730 return cciss_setnodename(h, argp);
1da177e4 1731 case CCISS_GETHEARTBEAT:
93c74931 1732 return cciss_getheartbeat(h, argp);
1da177e4 1733 case CCISS_GETBUSTYPES:
d18dfad4 1734 return cciss_getbustypes(h, argp);
1da177e4 1735 case CCISS_GETFIRMVER:
8a4f7fbf 1736 return cciss_getfirmver(h, argp);
7c832835 1737 case CCISS_GETDRIVVER:
c525919d 1738 return cciss_getdrivver(h, argp);
6ae5ce8e
MM		 1739 case CCISS_DEREGDISK:
1740 case CCISS_REGNEWD:
1da177e4 1741 case CCISS_REVALIDVOLS:
f70dba83 1742 return rebuild_lun_table(h, 0, 1);
0894b32c
SC		 1743 case CCISS_GETLUNINFO:
1744 return cciss_getluninfo(h, disk, argp);
1da177e4 1745 case CCISS_PASSTHRU:
f32f125b 1746 return cciss_passthru(h, argp);
0c9f5ba7
SC		 1747 case CCISS_BIG_PASSTHRU:
1748 return cciss_bigpassthru(h, argp);
03bbfee5 1749
577ebb37 1750 /* scsi_cmd_blk_ioctl handles these, below, though some are not */
03bbfee5
MMOD		 1751 /* very meaningful for cciss. SG_IO is the main one people want. */
1752
1753 case SG_GET_VERSION_NUM:
1754 case SG_SET_TIMEOUT:
1755 case SG_GET_TIMEOUT:
1756 case SG_GET_RESERVED_SIZE:
1757 case SG_SET_RESERVED_SIZE:
1758 case SG_EMULATED_HOST:
1759 case SG_IO:
1760 case SCSI_IOCTL_SEND_COMMAND:
577ebb37 1761 return scsi_cmd_blk_ioctl(bdev, mode, cmd, argp);
03bbfee5 1762
577ebb37 1763 /* scsi_cmd_blk_ioctl would normally handle these, below, but */
03bbfee5
MMOD		 1764 /* they aren't a good fit for cciss, as CD-ROMs are */
1765 /* not supported, and we don't have any bus/target/lun */
1766 /* which we present to the kernel. */
1767
1768 case CDROM_SEND_PACKET:
1769 case CDROMCLOSETRAY:
1770 case CDROMEJECT:
1771 case SCSI_IOCTL_GET_IDLUN:
1772 case SCSI_IOCTL_GET_BUS_NUMBER:
1da177e4
LT		 1773 default:
1774 return -ENOTTY;
1775 }
1da177e4
LT		 1776}
1777
7b30f092
JA		 1778static void cciss_check_queues(ctlr_info_t *h)
1779{
1780 int start_queue = h->next_to_run;
1781 int i;
1782
1783 /* check to see if we have maxed out the number of commands that can
1784 * be placed on the queue. If so then exit. We do this check here
1785 * in case the interrupt we serviced was from an ioctl and did not
1786 * free any new commands.
1787 */
f880632f 1788 if ((find_first_zero_bit(h->cmd_pool_bits, h->nr_cmds)) == h->nr_cmds)
7b30f092
JA		 1789 return;
1790
1791 /* We have room on the queue for more commands. Now we need to queue
1792 * them up. We will also keep track of the next queue to run so
1793 * that every queue gets a chance to be started first.
1794 */
1795 for (i = 0; i < h->highest_lun + 1; i++) {
1796 int curr_queue = (start_queue + i) % (h->highest_lun + 1);
1797 /* make sure the disk has been added and the drive is real
1798 * because this can be called from the middle of init_one.
1799 */
9cef0d2f
SC		 1800 if (!h->drv[curr_queue])
1801 continue;
1802 if (!(h->drv[curr_queue]->queue) ||
1803 !(h->drv[curr_queue]->heads))
7b30f092
JA		 1804 continue;
1805 blk_start_queue(h->gendisk[curr_queue]->queue);
1806
1807 /* check to see if we have maxed out the number of commands
1808 * that can be placed on the queue.
1809 */
f880632f 1810 if ((find_first_zero_bit(h->cmd_pool_bits, h->nr_cmds)) == h->nr_cmds) {
7b30f092
JA		 1811 if (curr_queue == start_queue) {
1812 h->next_to_run =
1813 (start_queue + 1) % (h->highest_lun + 1);
1814 break;
1815 } else {
1816 h->next_to_run = curr_queue;
1817 break;
1818 }
7b30f092
JA		 1819 }
1820 }
1821}
1822
ca1e0484
MM		 1823static void cciss_softirq_done(struct request *rq)
1824{
f70dba83
SC		 1825 CommandList_struct *c = rq->completion_data;
1826 ctlr_info_t *h = hba[c->ctlr];
1827 SGDescriptor_struct *curr_sg = c->SG;
ca1e0484 1828 u64bit temp64;
664a717d 1829 unsigned long flags;
ca1e0484 1830 int i, ddir;
5c07a311 1831 int sg_index = 0;
ca1e0484 1832
f70dba83 1833 if (c->Request.Type.Direction == XFER_READ)
ca1e0484
MM		 1834 ddir = PCI_DMA_FROMDEVICE;
1835 else
1836 ddir = PCI_DMA_TODEVICE;
1837
1838 /* command did not need to be retried */
1839 /* unmap the DMA mapping for all the scatter gather elements */
f70dba83 1840 for (i = 0; i < c->Header.SGList; i++) {
5c07a311 1841 if (curr_sg[sg_index].Ext == CCISS_SG_CHAIN) {
f70dba83 1842 cciss_unmap_sg_chain_block(h, c);
5c07a311 1843 /* Point to the next block */
f70dba83 1844 curr_sg = h->cmd_sg_list[c->cmdindex];
5c07a311
DB		 1845 sg_index = 0;
1846 }
1847 temp64.val32.lower = curr_sg[sg_index].Addr.lower;
1848 temp64.val32.upper = curr_sg[sg_index].Addr.upper;
1849 pci_unmap_page(h->pdev, temp64.val, curr_sg[sg_index].Len,
1850 ddir);
1851 ++sg_index;
ca1e0484
MM		 1852 }
1853
b2a4a43d 1854 dev_dbg(&h->pdev->dev, "Done with %p\n", rq);
ca1e0484 1855
c3a4d78c 1856 /* set the residual count for pc requests */
33659ebb 1857 if (rq->cmd_type == REQ_TYPE_BLOCK_PC)
82ed4db4 1858 scsi_req(rq)->resid_len = c->err_info->ResidualCnt;
ac44e5b2 1859
c3a4d78c 1860 blk_end_request_all(rq, (rq->errors == 0) ? 0 : -EIO);
3daeea29 1861
ca1e0484 1862 spin_lock_irqsave(&h->lock, flags);
6b4d96b8 1863 cmd_free(h, c);
7b30f092 1864 cciss_check_queues(h);
ca1e0484
MM		 1865 spin_unlock_irqrestore(&h->lock, flags);
1866}
1867
39ccf9a6
SC		 1868static inline void log_unit_to_scsi3addr(ctlr_info_t *h,
1869 unsigned char scsi3addr[], uint32_t log_unit)
b57695fe 1870{
9cef0d2f
SC		 1871 memcpy(scsi3addr, h->drv[log_unit]->LunID,
1872 sizeof(h->drv[log_unit]->LunID));
b57695fe 1873}
1874
7fe06326
AP		 1875/* This function gets the SCSI vendor, model, and revision of a logical drive
1876 * via the inquiry page 0. Model, vendor, and rev are set to empty strings if
1877 * they cannot be read.
1878 */
f70dba83 1879static void cciss_get_device_descr(ctlr_info_t *h, int logvol,
7fe06326
AP		 1880 char *vendor, char *model, char *rev)
1881{
1882 int rc;
1883 InquiryData_struct *inq_buf;
b57695fe 1884 unsigned char scsi3addr[8];
7fe06326
AP		 1885
1886 *vendor = '\0';
1887 *model = '\0';
1888 *rev = '\0';
1889
1890 inq_buf = kzalloc(sizeof(InquiryData_struct), GFP_KERNEL);
1891 if (!inq_buf)
1892 return;
1893
f70dba83
SC		 1894 log_unit_to_scsi3addr(h, scsi3addr, logvol);
1895 rc = sendcmd_withirq(h, CISS_INQUIRY, inq_buf, sizeof(*inq_buf), 0,
7b838bde 1896 scsi3addr, TYPE_CMD);
7fe06326
AP		 1897 if (rc == IO_OK) {
1898 memcpy(vendor, &inq_buf->data_byte[8], VENDOR_LEN);
1899 vendor[VENDOR_LEN] = '\0';
1900 memcpy(model, &inq_buf->data_byte[16], MODEL_LEN);
1901 model[MODEL_LEN] = '\0';
1902 memcpy(rev, &inq_buf->data_byte[32], REV_LEN);
1903 rev[REV_LEN] = '\0';
1904 }
1905
1906 kfree(inq_buf);
1907 return;
1908}
1909
a72da29b
MM		 1910/* This function gets the serial number of a logical drive via
1911 * inquiry page 0x83. Serial no. is 16 bytes. If the serial
1912 * number cannot be had, for whatever reason, 16 bytes of 0xff
1913 * are returned instead.
1914 */
f70dba83 1915static void cciss_get_serial_no(ctlr_info_t *h, int logvol,
a72da29b
MM		 1916 unsigned char *serial_no, int buflen)
1917{
1918#define PAGE_83_INQ_BYTES 64
1919 int rc;
1920 unsigned char *buf;
b57695fe 1921 unsigned char scsi3addr[8];
a72da29b
MM		 1922
1923 if (buflen > 16)
1924 buflen = 16;
1925 memset(serial_no, 0xff, buflen);
1926 buf = kzalloc(PAGE_83_INQ_BYTES, GFP_KERNEL);
1927 if (!buf)
1928 return;
1929 memset(serial_no, 0, buflen);
f70dba83
SC		 1930 log_unit_to_scsi3addr(h, scsi3addr, logvol);
1931 rc = sendcmd_withirq(h, CISS_INQUIRY, buf,
7b838bde 1932 PAGE_83_INQ_BYTES, 0x83, scsi3addr, TYPE_CMD);
a72da29b
MM		 1933 if (rc == IO_OK)
1934 memcpy(serial_no, &buf[8], buflen);
1935 kfree(buf);
1936 return;
1937}
1938
617e1344
SC		 1939/*
1940 * cciss_add_disk sets up the block device queue for a logical drive
1941 */
1942static int cciss_add_disk(ctlr_info_t *h, struct gendisk *disk,
6ae5ce8e
MM		 1943 int drv_index)
1944{
82ed4db4 1945 disk->queue = blk_alloc_queue(GFP_KERNEL);
e8074f79
SC		 1946 if (!disk->queue)
1947 goto init_queue_failure;
82ed4db4
CH		 1948
1949 disk->queue->cmd_size = sizeof(struct scsi_request);
1950 disk->queue->request_fn = do_cciss_request;
1951 disk->queue->queue_lock = &h->lock;
1952 if (blk_init_allocated_queue(disk->queue) < 0)
1953 goto cleanup_queue;
1954
6ae5ce8e
MM		 1955 sprintf(disk->disk_name, "cciss/c%dd%d", h->ctlr, drv_index);
1956 disk->major = h->major;
1957 disk->first_minor = drv_index << NWD_SHIFT;
1958 disk->fops = &cciss_fops;
9cef0d2f
SC		 1959 if (cciss_create_ld_sysfs_entry(h, drv_index))
1960 goto cleanup_queue;
1961 disk->private_data = h->drv[drv_index];
6ae5ce8e
MM		 1962
1963 /* Set up queue information */
1964 blk_queue_bounce_limit(disk->queue, h->pdev->dma_mask);
1965
1966 /* This is a hardware imposed limit. */
8a78362c 1967 blk_queue_max_segments(disk->queue, h->maxsgentries);
6ae5ce8e 1968
086fa5ff 1969 blk_queue_max_hw_sectors(disk->queue, h->cciss_max_sectors);
6ae5ce8e
MM		 1970
1971 blk_queue_softirq_done(disk->queue, cciss_softirq_done);
1972
1973 disk->queue->queuedata = h;
1974
e1defc4f 1975 blk_queue_logical_block_size(disk->queue,
9cef0d2f 1976 h->drv[drv_index]->block_size);
6ae5ce8e
MM		 1977
1978 /* Make sure all queue data is written out before */
9cef0d2f 1979 /* setting h->drv[drv_index]->queue, as setting this */
6ae5ce8e
MM		 1980 /* allows the interrupt handler to start the queue */
1981 wmb();
9cef0d2f 1982 h->drv[drv_index]->queue = disk->queue;
0d52c756 1983 device_add_disk(&h->drv[drv_index]->dev, disk);
617e1344
SC		 1984 return 0;
1985
1986cleanup_queue:
1987 blk_cleanup_queue(disk->queue);
1988 disk->queue = NULL;
e8074f79 1989init_queue_failure:
617e1344 1990 return -1;
6ae5ce8e
MM		 1991}
1992
ddd47442 1993/* This function will check the usage_count of the drive to be updated/added.
a72da29b
MM		 1994 * If the usage_count is zero and it is a heretofore unknown drive, or,
1995 * the drive's capacity, geometry, or serial number has changed,
1996 * then the drive information will be updated and the disk will be
1997 * re-registered with the kernel. If these conditions don't hold,
1998 * then it will be left alone for the next reboot. The exception to this
1999 * is disk 0 which will always be left registered with the kernel since it
2000 * is also the controller node. Any changes to disk 0 will show up on
2001 * the next reboot.
7c832835 2002 */
f70dba83
SC		 2003static void cciss_update_drive_info(ctlr_info_t *h, int drv_index,
2004 int first_time, int via_ioctl)
7c832835 2005{
ddd47442 2006 struct gendisk *disk;
ddd47442
MM		 2007 InquiryData_struct *inq_buff = NULL;
2008 unsigned int block_size;
00988a35 2009 sector_t total_size;
ddd47442
MM		 2010 unsigned long flags = 0;
2011 int ret = 0;
a72da29b
MM		 2012 drive_info_struct *drvinfo;
2013
2014 /* Get information about the disk and modify the driver structure */
2015 inq_buff = kmalloc(sizeof(InquiryData_struct), GFP_KERNEL);
9cef0d2f 2016 drvinfo = kzalloc(sizeof(*drvinfo), GFP_KERNEL);
a72da29b
MM		 2017 if (inq_buff == NULL || drvinfo == NULL)
2018 goto mem_msg;
2019
2020 /* testing to see if 16-byte CDBs are already being used */
2021 if (h->cciss_read == CCISS_READ_16) {
f70dba83 2022 cciss_read_capacity_16(h, drv_index,
a72da29b
MM		 2023 &total_size, &block_size);
2024
2025 } else {
f70dba83 2026 cciss_read_capacity(h, drv_index, &total_size, &block_size);
a72da29b
MM		 2027 /* if read_capacity returns all F's this volume is >2TB */
2028 /* in size so we switch to 16-byte CDB's for all */
2029 /* read/write ops */
2030 if (total_size == 0xFFFFFFFFULL) {
f70dba83 2031 cciss_read_capacity_16(h, drv_index,
a72da29b
MM		 2032 &total_size, &block_size);
2033 h->cciss_read = CCISS_READ_16;
2034 h->cciss_write = CCISS_WRITE_16;
2035 } else {
2036 h->cciss_read = CCISS_READ_10;
2037 h->cciss_write = CCISS_WRITE_10;
2038 }
2039 }
2040
f70dba83 2041 cciss_geometry_inquiry(h, drv_index, total_size, block_size,
a72da29b
MM		 2042 inq_buff, drvinfo);
2043 drvinfo->block_size = block_size;
2044 drvinfo->nr_blocks = total_size + 1;
2045
f70dba83 2046 cciss_get_device_descr(h, drv_index, drvinfo->vendor,
7fe06326 2047 drvinfo->model, drvinfo->rev);
f70dba83 2048 cciss_get_serial_no(h, drv_index, drvinfo->serial_no,
a72da29b 2049 sizeof(drvinfo->serial_no));
9cef0d2f
SC		 2050 /* Save the lunid in case we deregister the disk, below. */
2051 memcpy(drvinfo->LunID, h->drv[drv_index]->LunID,
2052 sizeof(drvinfo->LunID));
a72da29b
MM		 2053
2054 /* Is it the same disk we already know, and nothing's changed? */
9cef0d2f 2055 if (h->drv[drv_index]->raid_level != -1 &&
a72da29b 2056 ((memcmp(drvinfo->serial_no,
9cef0d2f
SC		 2057 h->drv[drv_index]->serial_no, 16) == 0) &&
2058 drvinfo->block_size == h->drv[drv_index]->block_size &&
2059 drvinfo->nr_blocks == h->drv[drv_index]->nr_blocks &&
2060 drvinfo->heads == h->drv[drv_index]->heads &&
2061 drvinfo->sectors == h->drv[drv_index]->sectors &&
2062 drvinfo->cylinders == h->drv[drv_index]->cylinders))
a72da29b
MM		 2063 /* The disk is unchanged, nothing to update */
2064 goto freeret;
a72da29b 2065
6ae5ce8e
MM		 2066 /* If we get here it's not the same disk, or something's changed,
2067 * so we need to * deregister it, and re-register it, if it's not
2068 * in use.
2069 * If the disk already exists then deregister it before proceeding
2070 * (unless it's the first disk (for the controller node).
2071 */
9cef0d2f 2072 if (h->drv[drv_index]->raid_level != -1 && drv_index != 0) {
b2a4a43d 2073 dev_warn(&h->pdev->dev, "disk %d has changed.\n", drv_index);
f70dba83 2074 spin_lock_irqsave(&h->lock, flags);
9cef0d2f 2075 h->drv[drv_index]->busy_configuring = 1;
f70dba83 2076 spin_unlock_irqrestore(&h->lock, flags);
e14ac670 2077
9cef0d2f 2078 /* deregister_disk sets h->drv[drv_index]->queue = NULL
6ae5ce8e
MM		 2079 * which keeps the interrupt handler from starting
2080 * the queue.
2081 */
2d11d993 2082 ret = deregister_disk(h, drv_index, 0, via_ioctl);
ddd47442
MM		 2083 }
2084
2085 /* If the disk is in use return */
2086 if (ret)
a72da29b
MM		 2087 goto freeret;
2088
6ae5ce8e 2089 /* Save the new information from cciss_geometry_inquiry
9cef0d2f
SC		 2090 * and serial number inquiry. If the disk was deregistered
2091 * above, then h->drv[drv_index] will be NULL.
6ae5ce8e 2092 */
9cef0d2f
SC		 2093 if (h->drv[drv_index] == NULL) {
2094 drvinfo->device_initialized = 0;
2095 h->drv[drv_index] = drvinfo;
2096 drvinfo = NULL; /* so it won't be freed below. */
2097 } else {
2098 /* special case for cxd0 */
2099 h->drv[drv_index]->block_size = drvinfo->block_size;
2100 h->drv[drv_index]->nr_blocks = drvinfo->nr_blocks;
2101 h->drv[drv_index]->heads = drvinfo->heads;
2102 h->drv[drv_index]->sectors = drvinfo->sectors;
2103 h->drv[drv_index]->cylinders = drvinfo->cylinders;
2104 h->drv[drv_index]->raid_level = drvinfo->raid_level;
2105 memcpy(h->drv[drv_index]->serial_no, drvinfo->serial_no, 16);
2106 memcpy(h->drv[drv_index]->vendor, drvinfo->vendor,
2107 VENDOR_LEN + 1);
2108 memcpy(h->drv[drv_index]->model, drvinfo->model, MODEL_LEN + 1);
2109 memcpy(h->drv[drv_index]->rev, drvinfo->rev, REV_LEN + 1);
2110 }
ddd47442
MM		 2111
2112 ++h->num_luns;
2113 disk = h->gendisk[drv_index];
9cef0d2f 2114 set_capacity(disk, h->drv[drv_index]->nr_blocks);
ddd47442 2115
6ae5ce8e
MM		 2116 /* If it's not disk 0 (drv_index != 0)
2117 * or if it was disk 0, but there was previously
2118 * no actual corresponding configured logical drive
2119 * (raid_leve == -1) then we want to update the
2120 * logical drive's information.
2121 */
361e9b07
SC		 2122 if (drv_index || first_time) {
2123 if (cciss_add_disk(h, disk, drv_index) != 0) {
2124 cciss_free_gendisk(h, drv_index);
9cef0d2f 2125 cciss_free_drive_info(h, drv_index);
b2a4a43d
SC		 2126 dev_warn(&h->pdev->dev, "could not update disk %d\n",
2127 drv_index);
361e9b07
SC		 2128 --h->num_luns;
2129 }
2130 }
ddd47442 2131
6ae5ce8e 2132freeret:
ddd47442 2133 kfree(inq_buff);
a72da29b 2134 kfree(drvinfo);
ddd47442 2135 return;
6ae5ce8e 2136mem_msg:
b2a4a43d 2137 dev_err(&h->pdev->dev, "out of memory\n");
ddd47442
MM		 2138 goto freeret;
2139}
2140
2141/* This function will find the first index of the controllers drive array
9cef0d2f
SC		 2142 * that has a null drv pointer and allocate the drive info struct and
2143 * will return that index This is where new drives will be added.
2144 * If the index to be returned is greater than the highest_lun index for
2145 * the controller then highest_lun is set * to this new index.
2146 * If there are no available indexes or if tha allocation fails, then -1
2147 * is returned. * "controller_node" is used to know if this is a real
2148 * logical drive, or just the controller node, which determines if this
2149 * counts towards highest_lun.
7c832835 2150 */
9cef0d2f 2151static int cciss_alloc_drive_info(ctlr_info_t *h, int controller_node)
ddd47442
MM		 2152{
2153 int i;
9cef0d2f 2154 drive_info_struct *drv;
ddd47442 2155
9cef0d2f 2156 /* Search for an empty slot for our drive info */
7c832835 2157 for (i = 0; i < CISS_MAX_LUN; i++) {
9cef0d2f
SC		 2158
2159 /* if not cxd0 case, and it's occupied, skip it. */
2160 if (h->drv[i] && i != 0)
2161 continue;
2162 /*
2163 * If it's cxd0 case, and drv is alloc'ed already, and a
2164 * disk is configured there, skip it.
2165 */
2166 if (i == 0 && h->drv[i] && h->drv[i]->raid_level != -1)
2167 continue;
2168
2169 /*
2170 * We've found an empty slot. Update highest_lun
2171 * provided this isn't just the fake cxd0 controller node.
2172 */
2173 if (i > h->highest_lun && !controller_node)
2174 h->highest_lun = i;
2175
2176 /* If adding a real disk at cxd0, and it's already alloc'ed */
2177 if (i == 0 && h->drv[i] != NULL)
ddd47442 2178 return i;
9cef0d2f
SC		 2179
2180 /*
2181 * Found an empty slot, not already alloc'ed. Allocate it.
2182 * Mark it with raid_level == -1, so we know it's new later on.
2183 */
2184 drv = kzalloc(sizeof(*drv), GFP_KERNEL);
2185 if (!drv)
2186 return -1;
2187 drv->raid_level = -1; /* so we know it's new */
2188 h->drv[i] = drv;
2189 return i;
ddd47442
MM		 2190 }
2191 return -1;
2192}
2193
9cef0d2f
SC		 2194static void cciss_free_drive_info(ctlr_info_t *h, int drv_index)
2195{
2196 kfree(h->drv[drv_index]);
2197 h->drv[drv_index] = NULL;
2198}
2199
361e9b07
SC		 2200static void cciss_free_gendisk(ctlr_info_t *h, int drv_index)
2201{
2202 put_disk(h->gendisk[drv_index]);
2203 h->gendisk[drv_index] = NULL;
2204}
2205
6ae5ce8e
MM		 2206/* cciss_add_gendisk finds a free hba[]->drv structure
2207 * and allocates a gendisk if needed, and sets the lunid
2208 * in the drvinfo structure. It returns the index into
2209 * the ->drv[] array, or -1 if none are free.
2210 * is_controller_node indicates whether highest_lun should
2211 * count this disk, or if it's only being added to provide
2212 * a means to talk to the controller in case no logical
2213 * drives have yet been configured.
2214 */
39ccf9a6
SC		 2215static int cciss_add_gendisk(ctlr_info_t *h, unsigned char lunid[],
2216 int controller_node)
6ae5ce8e
MM		 2217{
2218 int drv_index;
2219
9cef0d2f 2220 drv_index = cciss_alloc_drive_info(h, controller_node);
6ae5ce8e
MM		 2221 if (drv_index == -1)
2222 return -1;
8ce51966 2223
6ae5ce8e
MM		 2224 /*Check if the gendisk needs to be allocated */
2225 if (!h->gendisk[drv_index]) {
2226 h->gendisk[drv_index] =
2227 alloc_disk(1 << NWD_SHIFT);
2228 if (!h->gendisk[drv_index]) {
b2a4a43d
SC		 2229 dev_err(&h->pdev->dev,
2230 "could not allocate a new disk %d\n",
2231 drv_index);
9cef0d2f 2232 goto err_free_drive_info;
6ae5ce8e
MM		 2233 }
2234 }
9cef0d2f
SC		 2235 memcpy(h->drv[drv_index]->LunID, lunid,
2236 sizeof(h->drv[drv_index]->LunID));
2237 if (cciss_create_ld_sysfs_entry(h, drv_index))
7fe06326 2238 goto err_free_disk;
6ae5ce8e
MM		 2239 /* Don't need to mark this busy because nobody */
2240 /* else knows about this disk yet to contend */
2241 /* for access to it. */
9cef0d2f 2242 h->drv[drv_index]->busy_configuring = 0;
6ae5ce8e
MM		 2243 wmb();
2244 return drv_index;
7fe06326
AP		 2245
2246err_free_disk:
361e9b07 2247 cciss_free_gendisk(h, drv_index);
9cef0d2f
SC		 2248err_free_drive_info:
2249 cciss_free_drive_info(h, drv_index);
7fe06326 2250 return -1;
6ae5ce8e
MM		 2251}
2252
2253/* This is for the special case of a controller which
2254 * has no logical drives. In this case, we still need
2255 * to register a disk so the controller can be accessed
2256 * by the Array Config Utility.
2257 */
2258static void cciss_add_controller_node(ctlr_info_t *h)
2259{
2260 struct gendisk *disk;
2261 int drv_index;
2262
2263 if (h->gendisk[0] != NULL) /* already did this? Then bail. */
2264 return;
2265
39ccf9a6 2266 drv_index = cciss_add_gendisk(h, CTLR_LUNID, 1);
361e9b07
SC		 2267 if (drv_index == -1)
2268 goto error;
9cef0d2f
SC		 2269 h->drv[drv_index]->block_size = 512;
2270 h->drv[drv_index]->nr_blocks = 0;
2271 h->drv[drv_index]->heads = 0;
2272 h->drv[drv_index]->sectors = 0;
2273 h->drv[drv_index]->cylinders = 0;
2274 h->drv[drv_index]->raid_level = -1;
2275 memset(h->drv[drv_index]->serial_no, 0, 16);
6ae5ce8e 2276 disk = h->gendisk[drv_index];
361e9b07
SC		 2277 if (cciss_add_disk(h, disk, drv_index) == 0)
2278 return;
2279 cciss_free_gendisk(h, drv_index);
9cef0d2f 2280 cciss_free_drive_info(h, drv_index);
361e9b07 2281error:
b2a4a43d 2282 dev_warn(&h->pdev->dev, "could not add disk 0.\n");
361e9b07 2283 return;
6ae5ce8e
MM		 2284}
2285
ddd47442 2286/* This function will add and remove logical drives from the Logical
d14c4ab5 2287 * drive array of the controller and maintain persistency of ordering
ddd47442
MM		 2288 * so that mount points are preserved until the next reboot. This allows
2289 * for the removal of logical drives in the middle of the drive array
2290 * without a re-ordering of those drives.
2291 * INPUT
2292 * h = The controller to perform the operations on
7c832835 2293 */
2d11d993
SC		 2294static int rebuild_lun_table(ctlr_info_t *h, int first_time,
2295 int via_ioctl)
1da177e4 2296{
ddd47442
MM		 2297 int num_luns;
2298 ReportLunData_struct *ld_buff = NULL;
ddd47442
MM		 2299 int return_code;
2300 int listlength = 0;
2301 int i;
2302 int drv_found;
2303 int drv_index = 0;
39ccf9a6 2304 unsigned char lunid[8] = CTLR_LUNID;
1da177e4 2305 unsigned long flags;
ddd47442 2306
6ae5ce8e
MM		 2307 if (!capable(CAP_SYS_RAWIO))
2308 return -EPERM;
2309
ddd47442 2310 /* Set busy_configuring flag for this operation */
f70dba83 2311 spin_lock_irqsave(&h->lock, flags);
7c832835 2312 if (h->busy_configuring) {
f70dba83 2313 spin_unlock_irqrestore(&h->lock, flags);
ddd47442
MM		 2314 return -EBUSY;
2315 }
2316 h->busy_configuring = 1;
f70dba83 2317 spin_unlock_irqrestore(&h->lock, flags);
ddd47442 2318
a72da29b
MM		 2319 ld_buff = kzalloc(sizeof(ReportLunData_struct), GFP_KERNEL);
2320 if (ld_buff == NULL)
2321 goto mem_msg;
2322
f70dba83 2323 return_code = sendcmd_withirq(h, CISS_REPORT_LOG, ld_buff,
b57695fe 2324 sizeof(ReportLunData_struct),
2325 0, CTLR_LUNID, TYPE_CMD);
ddd47442 2326
a72da29b
MM		 2327 if (return_code == IO_OK)
2328 listlength = be32_to_cpu(*(__be32 *) ld_buff->LUNListLength);
2329 else { /* reading number of logical volumes failed */
b2a4a43d
SC		 2330 dev_warn(&h->pdev->dev,
2331 "report logical volume command failed\n");
a72da29b
MM		 2332 listlength = 0;
2333 goto freeret;
2334 }
2335
2336 num_luns = listlength / 8; /* 8 bytes per entry */
2337 if (num_luns > CISS_MAX_LUN) {
2338 num_luns = CISS_MAX_LUN;
b2a4a43d 2339 dev_warn(&h->pdev->dev, "more luns configured"
a72da29b
MM		 2340 " on controller than can be handled by"
2341 " this driver.\n");
2342 }
2343
6ae5ce8e
MM		 2344 if (num_luns == 0)
2345 cciss_add_controller_node(h);
2346
2347 /* Compare controller drive array to driver's drive array
2348 * to see if any drives are missing on the controller due
2349 * to action of Array Config Utility (user deletes drive)
2350 * and deregister logical drives which have disappeared.
2351 */
a72da29b
MM		 2352 for (i = 0; i <= h->highest_lun; i++) {
2353 int j;
2354 drv_found = 0;
d8a0be6a
SC		 2355
2356 /* skip holes in the array from already deleted drives */
9cef0d2f 2357 if (h->drv[i] == NULL)
d8a0be6a
SC		 2358 continue;
2359
a72da29b 2360 for (j = 0; j < num_luns; j++) {
39ccf9a6 2361 memcpy(lunid, &ld_buff->LUN[j][0], sizeof(lunid));
9cef0d2f 2362 if (memcmp(h->drv[i]->LunID, lunid,
39ccf9a6 2363 sizeof(lunid)) == 0) {
a72da29b
MM		 2364 drv_found = 1;
2365 break;
2366 }
2367 }
2368 if (!drv_found) {
2369 /* Deregister it from the OS, it's gone. */
f70dba83 2370 spin_lock_irqsave(&h->lock, flags);
9cef0d2f 2371 h->drv[i]->busy_configuring = 1;
f70dba83 2372 spin_unlock_irqrestore(&h->lock, flags);
2d11d993 2373 return_code = deregister_disk(h, i, 1, via_ioctl);
9cef0d2f
SC		 2374 if (h->drv[i] != NULL)
2375 h->drv[i]->busy_configuring = 0;
ddd47442 2376 }
a72da29b 2377 }
ddd47442 2378
a72da29b
MM		 2379 /* Compare controller drive array to driver's drive array.
2380 * Check for updates in the drive information and any new drives
2381 * on the controller due to ACU adding logical drives, or changing
2382 * a logical drive's size, etc. Reregister any new/changed drives
2383 */
2384 for (i = 0; i < num_luns; i++) {
2385 int j;
ddd47442 2386
a72da29b 2387 drv_found = 0;
ddd47442 2388
39ccf9a6 2389 memcpy(lunid, &ld_buff->LUN[i][0], sizeof(lunid));
a72da29b
MM		 2390 /* Find if the LUN is already in the drive array
2391 * of the driver. If so then update its info
2392 * if not in use. If it does not exist then find
2393 * the first free index and add it.
2394 */
2395 for (j = 0; j <= h->highest_lun; j++) {
9cef0d2f
SC		 2396 if (h->drv[j] != NULL &&
2397 memcmp(h->drv[j]->LunID, lunid,
2398 sizeof(h->drv[j]->LunID)) == 0) {
a72da29b
MM		 2399 drv_index = j;
2400 drv_found = 1;
2401 break;
ddd47442 2402 }
a72da29b 2403 }
ddd47442 2404
a72da29b
MM		 2405 /* check if the drive was found already in the array */
2406 if (!drv_found) {
eece695f 2407 drv_index = cciss_add_gendisk(h, lunid, 0);
a72da29b
MM		 2408 if (drv_index == -1)
2409 goto freeret;
a72da29b 2410 }
f70dba83 2411 cciss_update_drive_info(h, drv_index, first_time, via_ioctl);
a72da29b 2412 } /* end for */
ddd47442 2413
6ae5ce8e 2414freeret:
ddd47442
MM		 2415 kfree(ld_buff);
2416 h->busy_configuring = 0;
2417 /* We return -1 here to tell the ACU that we have registered/updated
2418 * all of the drives that we can and to keep it from calling us
2419 * additional times.
7c832835 2420 */
ddd47442 2421 return -1;
6ae5ce8e 2422mem_msg:
b2a4a43d 2423 dev_err(&h->pdev->dev, "out of memory\n");
a72da29b 2424 h->busy_configuring = 0;
ddd47442
MM		 2425 goto freeret;
2426}
2427
9ddb27b4
SC		 2428static void cciss_clear_drive_info(drive_info_struct *drive_info)
2429{
2430 /* zero out the disk size info */
2431 drive_info->nr_blocks = 0;
2432 drive_info->block_size = 0;
2433 drive_info->heads = 0;
2434 drive_info->sectors = 0;
2435 drive_info->cylinders = 0;
2436 drive_info->raid_level = -1;
2437 memset(drive_info->serial_no, 0, sizeof(drive_info->serial_no));
2438 memset(drive_info->model, 0, sizeof(drive_info->model));
2439 memset(drive_info->rev, 0, sizeof(drive_info->rev));
2440 memset(drive_info->vendor, 0, sizeof(drive_info->vendor));
2441 /*
2442 * don't clear the LUNID though, we need to remember which
2443 * one this one is.
2444 */
2445}
2446
ddd47442
MM		 2447/* This function will deregister the disk and it's queue from the
2448 * kernel. It must be called with the controller lock held and the
2449 * drv structures busy_configuring flag set. It's parameters are:
2450 *
2451 * disk = This is the disk to be deregistered
2452 * drv = This is the drive_info_struct associated with the disk to be
2453 * deregistered. It contains information about the disk used
2454 * by the driver.
2455 * clear_all = This flag determines whether or not the disk information
2456 * is going to be completely cleared out and the highest_lun
2457 * reset. Sometimes we want to clear out information about
d14c4ab5 2458 * the disk in preparation for re-adding it. In this case
ddd47442
MM		 2459 * the highest_lun should be left unchanged and the LunID
2460 * should not be cleared.
2d11d993
SC		 2461 * via_ioctl
2462 * This indicates whether we've reached this path via ioctl.
2463 * This affects the maximum usage count allowed for c0d0 to be messed with.
2464 * If this path is reached via ioctl(), then the max_usage_count will
2465 * be 1, as the process calling ioctl() has got to have the device open.
2466 * If we get here via sysfs, then the max usage count will be zero.
ddd47442 2467*/
a0ea8622 2468static int deregister_disk(ctlr_info_t *h, int drv_index,
2d11d993 2469 int clear_all, int via_ioctl)
ddd47442 2470{
799202cb 2471 int i;
a0ea8622
SC		 2472 struct gendisk *disk;
2473 drive_info_struct *drv;
9cef0d2f 2474 int recalculate_highest_lun;
1da177e4
LT		 2475
2476 if (!capable(CAP_SYS_RAWIO))
2477 return -EPERM;
2478
9cef0d2f 2479 drv = h->drv[drv_index];
a0ea8622
SC		 2480 disk = h->gendisk[drv_index];
2481
1da177e4 2482 /* make sure logical volume is NOT is use */
7c832835 2483 if (clear_all || (h->gendisk[0] == disk)) {
2d11d993 2484 if (drv->usage_count > via_ioctl)
7c832835
BH		 2485 return -EBUSY;
2486 } else if (drv->usage_count > 0)
2487 return -EBUSY;
1da177e4 2488
9cef0d2f
SC		 2489 recalculate_highest_lun = (drv == h->drv[h->highest_lun]);
2490
ddd47442
MM		 2491 /* invalidate the devices and deregister the disk. If it is disk
2492 * zero do not deregister it but just zero out it's values. This
2493 * allows us to delete disk zero but keep the controller registered.
7c832835
BH		 2494 */
2495 if (h->gendisk[0] != disk) {
5a9df732 2496 struct request_queue *q = disk->queue;
097d0264 2497 if (disk->flags & GENHD_FL_UP) {
8ce51966 2498 cciss_destroy_ld_sysfs_entry(h, drv_index, 0);
5a9df732 2499 del_gendisk(disk);
5a9df732 2500 }
9cef0d2f 2501 if (q)
5a9df732 2502 blk_cleanup_queue(q);
5a9df732
AB		 2503 /* If clear_all is set then we are deleting the logical
2504 * drive, not just refreshing its info. For drives
2505 * other than disk 0 we will call put_disk. We do not
2506 * do this for disk 0 as we need it to be able to
2507 * configure the controller.
a72da29b 2508 */
5a9df732
AB		 2509 if (clear_all){
2510 /* This isn't pretty, but we need to find the
2511 * disk in our array and NULL our the pointer.
2512 * This is so that we will call alloc_disk if
2513 * this index is used again later.
a72da29b 2514 */
5a9df732 2515 for (i=0; i < CISS_MAX_LUN; i++){
a72da29b 2516 if (h->gendisk[i] == disk) {
5a9df732
AB		 2517 h->gendisk[i] = NULL;
2518 break;
799202cb 2519 }
799202cb 2520 }
5a9df732 2521 put_disk(disk);
ddd47442 2522 }
799202cb
MM		 2523 } else {
2524 set_capacity(disk, 0);
9cef0d2f 2525 cciss_clear_drive_info(drv);
ddd47442
MM		 2526 }
2527
2528 --h->num_luns;
ddd47442 2529
9cef0d2f
SC		 2530 /* if it was the last disk, find the new hightest lun */
2531 if (clear_all && recalculate_highest_lun) {
c2d45b4d 2532 int newhighest = -1;
9cef0d2f
SC		 2533 for (i = 0; i <= h->highest_lun; i++) {
2534 /* if the disk has size > 0, it is available */
2535 if (h->drv[i] && h->drv[i]->heads)
2536 newhighest = i;
1da177e4 2537 }
9cef0d2f 2538 h->highest_lun = newhighest;
ddd47442 2539 }
e2019b58 2540 return 0;
1da177e4 2541}
ddd47442 2542
f70dba83 2543static int fill_cmd(ctlr_info_t *h, CommandList_struct *c, __u8 cmd, void *buff,
b57695fe 2544 size_t size, __u8 page_code, unsigned char *scsi3addr,
2545 int cmd_type)
1da177e4 2546{
1da177e4
LT		 2547 u64bit buff_dma_handle;
2548 int status = IO_OK;
2549
2550 c->cmd_type = CMD_IOCTL_PEND;
2551 c->Header.ReplyQueue = 0;
7c832835 2552 if (buff != NULL) {
1da177e4 2553 c->Header.SGList = 1;
7c832835 2554 c->Header.SGTotal = 1;
1da177e4
LT		 2555 } else {
2556 c->Header.SGList = 0;
7c832835 2557 c->Header.SGTotal = 0;
1da177e4
LT		 2558 }
2559 c->Header.Tag.lower = c->busaddr;
b57695fe 2560 memcpy(c->Header.LUN.LunAddrBytes, scsi3addr, 8);
1da177e4
LT		 2561
2562 c->Request.Type.Type = cmd_type;
2563 if (cmd_type == TYPE_CMD) {
7c832835
BH		 2564 switch (cmd) {
2565 case CISS_INQUIRY:
1da177e4 2566 /* are we trying to read a vital product page */
7c832835 2567 if (page_code != 0) {
1da177e4
LT		 2568 c->Request.CDB[1] = 0x01;
2569 c->Request.CDB[2] = page_code;
2570 }
2571 c->Request.CDBLen = 6;
7c832835 2572 c->Request.Type.Attribute = ATTR_SIMPLE;
1da177e4
LT		 2573 c->Request.Type.Direction = XFER_READ;
2574 c->Request.Timeout = 0;
7c832835
BH		 2575 c->Request.CDB[0] = CISS_INQUIRY;
2576 c->Request.CDB[4] = size & 0xFF;
2577 break;
1da177e4
LT		 2578 case CISS_REPORT_LOG:
2579 case CISS_REPORT_PHYS:
7c832835 2580 /* Talking to controller so It's a physical command
1da177e4 2581 mode = 00 target = 0. Nothing to write.
7c832835 2582 */
1da177e4
LT		 2583 c->Request.CDBLen = 12;
2584 c->Request.Type.Attribute = ATTR_SIMPLE;
2585 c->Request.Type.Direction = XFER_READ;
2586 c->Request.Timeout = 0;
2587 c->Request.CDB[0] = cmd;
b028461d 2588 c->Request.CDB[6] = (size >> 24) & 0xFF; /* MSB */
1da177e4
LT		 2589 c->Request.CDB[7] = (size >> 16) & 0xFF;
2590 c->Request.CDB[8] = (size >> 8) & 0xFF;
2591 c->Request.CDB[9] = size & 0xFF;
2592 break;
2593
2594 case CCISS_READ_CAPACITY:
1da177e4
LT		 2595 c->Request.CDBLen = 10;
2596 c->Request.Type.Attribute = ATTR_SIMPLE;
2597 c->Request.Type.Direction = XFER_READ;
2598 c->Request.Timeout = 0;
2599 c->Request.CDB[0] = cmd;
7c832835 2600 break;
00988a35 2601 case CCISS_READ_CAPACITY_16:
00988a35
MMOD		 2602 c->Request.CDBLen = 16;
2603 c->Request.Type.Attribute = ATTR_SIMPLE;
2604 c->Request.Type.Direction = XFER_READ;
2605 c->Request.Timeout = 0;
2606 c->Request.CDB[0] = cmd;
2607 c->Request.CDB[1] = 0x10;
2608 c->Request.CDB[10] = (size >> 24) & 0xFF;
2609 c->Request.CDB[11] = (size >> 16) & 0xFF;
2610 c->Request.CDB[12] = (size >> 8) & 0xFF;
2611 c->Request.CDB[13] = size & 0xFF;
2612 c->Request.Timeout = 0;
2613 c->Request.CDB[0] = cmd;
2614 break;
1da177e4
LT		 2615 case CCISS_CACHE_FLUSH:
2616 c->Request.CDBLen = 12;
2617 c->Request.Type.Attribute = ATTR_SIMPLE;
2618 c->Request.Type.Direction = XFER_WRITE;
2619 c->Request.Timeout = 0;
2620 c->Request.CDB[0] = BMIC_WRITE;
2621 c->Request.CDB[6] = BMIC_CACHE_FLUSH;
59bd71a8
SC		 2622 c->Request.CDB[7] = (size >> 8) & 0xFF;
2623 c->Request.CDB[8] = size & 0xFF;
7c832835 2624 break;
88f627ae 2625 case TEST_UNIT_READY:
88f627ae
SC		 2626 c->Request.CDBLen = 6;
2627 c->Request.Type.Attribute = ATTR_SIMPLE;
2628 c->Request.Type.Direction = XFER_NONE;
2629 c->Request.Timeout = 0;
2630 break;
1da177e4 2631 default:
b2a4a43d 2632 dev_warn(&h->pdev->dev, "Unknown Command 0x%c\n", cmd);
e2019b58 2633 return IO_ERROR;
1da177e4
LT		 2634 }
2635 } else if (cmd_type == TYPE_MSG) {
2636 switch (cmd) {
8f71bb82 2637 case CCISS_ABORT_MSG:
3da8b713 2638 c->Request.CDBLen = 12;
2639 c->Request.Type.Attribute = ATTR_SIMPLE;
2640 c->Request.Type.Direction = XFER_WRITE;
2641 c->Request.Timeout = 0;
7c832835
BH		 2642 c->Request.CDB[0] = cmd; /* abort */
2643 c->Request.CDB[1] = 0; /* abort a command */
3da8b713 2644 /* buff contains the tag of the command to abort */
2645 memcpy(&c->Request.CDB[4], buff, 8);
2646 break;
8f71bb82 2647 case CCISS_RESET_MSG:
88f627ae 2648 c->Request.CDBLen = 16;
3da8b713 2649 c->Request.Type.Attribute = ATTR_SIMPLE;
88f627ae 2650 c->Request.Type.Direction = XFER_NONE;
3da8b713 2651 c->Request.Timeout = 0;
2652 memset(&c->Request.CDB[0], 0, sizeof(c->Request.CDB));
7c832835 2653 c->Request.CDB[0] = cmd; /* reset */
8f71bb82 2654 c->Request.CDB[1] = CCISS_RESET_TYPE_TARGET;
00988a35 2655 break;
8f71bb82 2656 case CCISS_NOOP_MSG:
1da177e4
LT		 2657 c->Request.CDBLen = 1;
2658 c->Request.Type.Attribute = ATTR_SIMPLE;
2659 c->Request.Type.Direction = XFER_WRITE;
2660 c->Request.Timeout = 0;
2661 c->Request.CDB[0] = cmd;
2662 break;
2663 default:
b2a4a43d
SC		 2664 dev_warn(&h->pdev->dev,
2665 "unknown message type %d\n", cmd);
1da177e4
LT		 2666 return IO_ERROR;
2667 }
2668 } else {
b2a4a43d 2669 dev_warn(&h->pdev->dev, "unknown command type %d\n", cmd_type);
1da177e4
LT		 2670 return IO_ERROR;
2671 }
2672 /* Fill in the scatter gather information */
2673 if (size > 0) {
2674 buff_dma_handle.val = (__u64) pci_map_single(h->pdev,
7c832835
BH		 2675 buff, size,
2676 PCI_DMA_BIDIRECTIONAL);
1da177e4
LT		 2677 c->SG[0].Addr.lower = buff_dma_handle.val32.lower;
2678 c->SG[0].Addr.upper = buff_dma_handle.val32.upper;
2679 c->SG[0].Len = size;
7c832835 2680 c->SG[0].Ext = 0; /* we are not chaining */
1da177e4
LT		 2681 }
2682 return status;
2683}
7c832835 2684
8d85fce7
GKH		 2685static int cciss_send_reset(ctlr_info_t *h, unsigned char *scsi3addr,
2686 u8 reset_type)
edc83d47
JA		 2687{
2688 CommandList_struct *c;
2689 int return_status;
2690
2691 c = cmd_alloc(h);
2692 if (!c)
2693 return -ENOMEM;
2694 return_status = fill_cmd(h, c, CCISS_RESET_MSG, NULL, 0, 0,
2695 CTLR_LUNID, TYPE_MSG);
2696 c->Request.CDB[1] = reset_type; /* fill_cmd defaults to target reset */
2697 if (return_status != IO_OK) {
2698 cmd_special_free(h, c);
2699 return return_status;
2700 }
2701 c->waiting = NULL;
2702 enqueue_cmd_and_start_io(h, c);
2703 /* Don't wait for completion, the reset won't complete. Don't free
2704 * the command either. This is the last command we will send before
2705 * re-initializing everything, so it doesn't matter and won't leak.
2706 */
2707 return 0;
2708}
2709
3c2ab402 2710static int check_target_status(ctlr_info_t *h, CommandList_struct *c)
2711{
2712 switch (c->err_info->ScsiStatus) {
2713 case SAM_STAT_GOOD:
2714 return IO_OK;
2715 case SAM_STAT_CHECK_CONDITION:
2716 switch (0xf & c->err_info->SenseInfo[2]) {
2717 case 0: return IO_OK; /* no sense */
2718 case 1: return IO_OK; /* recovered error */
2719 default:
c08fac65
SC		 2720 if (check_for_unit_attention(h, c))
2721 return IO_NEEDS_RETRY;
b2a4a43d 2722 dev_warn(&h->pdev->dev, "cmd 0x%02x "
3c2ab402 2723 "check condition, sense key = 0x%02x\n",
b2a4a43d 2724 c->Request.CDB[0], c->err_info->SenseInfo[2]);
3c2ab402 2725 }
2726 break;
2727 default:
b2a4a43d
SC		 2728 dev_warn(&h->pdev->dev, "cmd 0x%02x"
2729 "scsi status = 0x%02x\n",
3c2ab402 2730 c->Request.CDB[0], c->err_info->ScsiStatus);
2731 break;
2732 }
2733 return IO_ERROR;
2734}
2735
789a424a 2736static int process_sendcmd_error(ctlr_info_t *h, CommandList_struct *c)
1da177e4 2737{
5390cfc3 2738 int return_status = IO_OK;
7c832835 2739
789a424a 2740 if (c->err_info->CommandStatus == CMD_SUCCESS)
2741 return IO_OK;
5390cfc3 2742
2743 switch (c->err_info->CommandStatus) {
2744 case CMD_TARGET_STATUS:
3c2ab402 2745 return_status = check_target_status(h, c);
5390cfc3 2746 break;
2747 case CMD_DATA_UNDERRUN:
2748 case CMD_DATA_OVERRUN:
2749 /* expected for inquiry and report lun commands */
2750 break;
2751 case CMD_INVALID:
b2a4a43d 2752 dev_warn(&h->pdev->dev, "cmd 0x%02x is "
5390cfc3 2753 "reported invalid\n", c->Request.CDB[0]);
2754 return_status = IO_ERROR;
2755 break;
2756 case CMD_PROTOCOL_ERR:
b2a4a43d
SC		 2757 dev_warn(&h->pdev->dev, "cmd 0x%02x has "
2758 "protocol error\n", c->Request.CDB[0]);
5390cfc3 2759 return_status = IO_ERROR;
2760 break;
2761 case CMD_HARDWARE_ERR:
b2a4a43d 2762 dev_warn(&h->pdev->dev, "cmd 0x%02x had "
5390cfc3 2763 " hardware error\n", c->Request.CDB[0]);
2764 return_status = IO_ERROR;
2765 break;
2766 case CMD_CONNECTION_LOST:
b2a4a43d 2767 dev_warn(&h->pdev->dev, "cmd 0x%02x had "
5390cfc3 2768 "connection lost\n", c->Request.CDB[0]);
2769 return_status = IO_ERROR;
2770 break;
2771 case CMD_ABORTED:
b2a4a43d 2772 dev_warn(&h->pdev->dev, "cmd 0x%02x was "
5390cfc3 2773 "aborted\n", c->Request.CDB[0]);
2774 return_status = IO_ERROR;
2775 break;
2776 case CMD_ABORT_FAILED:
b2a4a43d 2777 dev_warn(&h->pdev->dev, "cmd 0x%02x reports "
5390cfc3 2778 "abort failed\n", c->Request.CDB[0]);
2779 return_status = IO_ERROR;
2780 break;
2781 case CMD_UNSOLICITED_ABORT:
b2a4a43d 2782 dev_warn(&h->pdev->dev, "unsolicited abort 0x%02x\n",
5390cfc3 2783 c->Request.CDB[0]);
789a424a 2784 return_status = IO_NEEDS_RETRY;
5390cfc3 2785 break;
6d9a4f9e
SC		 2786 case CMD_UNABORTABLE:
2787 dev_warn(&h->pdev->dev, "cmd unabortable\n");
2788 return_status = IO_ERROR;
2789 break;
5390cfc3 2790 default:
b2a4a43d 2791 dev_warn(&h->pdev->dev, "cmd 0x%02x returned "
5390cfc3 2792 "unknown status %x\n", c->Request.CDB[0],
2793 c->err_info->CommandStatus);
2794 return_status = IO_ERROR;
7c832835 2795 }
789a424a 2796 return return_status;
2797}
2798
2799static int sendcmd_withirq_core(ctlr_info_t *h, CommandList_struct *c,
2800 int attempt_retry)
2801{
2802 DECLARE_COMPLETION_ONSTACK(wait);
2803 u64bit buff_dma_handle;
789a424a 2804 int return_status = IO_OK;
2805
2806resend_cmd2:
2807 c->waiting = &wait;
664a717d 2808 enqueue_cmd_and_start_io(h, c);
789a424a 2809
2810 wait_for_completion(&wait);
2811
2812 if (c->err_info->CommandStatus == 0 || !attempt_retry)
2813 goto command_done;
2814
2815 return_status = process_sendcmd_error(h, c);
2816
2817 if (return_status == IO_NEEDS_RETRY &&
2818 c->retry_count < MAX_CMD_RETRIES) {
b2a4a43d 2819 dev_warn(&h->pdev->dev, "retrying 0x%02x\n",
789a424a 2820 c->Request.CDB[0]);
2821 c->retry_count++;
2822 /* erase the old error information */
2823 memset(c->err_info, 0, sizeof(ErrorInfo_struct));
2824 return_status = IO_OK;
16735d02 2825 reinit_completion(&wait);
789a424a 2826 goto resend_cmd2;
2827 }
5390cfc3 2828
2829command_done:
1da177e4 2830 /* unlock the buffers from DMA */
bb2a37bf
MM		 2831 buff_dma_handle.val32.lower = c->SG[0].Addr.lower;
2832 buff_dma_handle.val32.upper = c->SG[0].Addr.upper;
7c832835
BH		 2833 pci_unmap_single(h->pdev, (dma_addr_t) buff_dma_handle.val,
2834 c->SG[0].Len, PCI_DMA_BIDIRECTIONAL);
5390cfc3 2835 return return_status;
2836}
2837
f70dba83 2838static int sendcmd_withirq(ctlr_info_t *h, __u8 cmd, void *buff, size_t size,
b57695fe 2839 __u8 page_code, unsigned char scsi3addr[],
2840 int cmd_type)
5390cfc3 2841{
5390cfc3 2842 CommandList_struct *c;
2843 int return_status;
2844
6b4d96b8 2845 c = cmd_special_alloc(h);
5390cfc3 2846 if (!c)
2847 return -ENOMEM;
f70dba83 2848 return_status = fill_cmd(h, c, cmd, buff, size, page_code,
b57695fe 2849 scsi3addr, cmd_type);
5390cfc3 2850 if (return_status == IO_OK)
789a424a 2851 return_status = sendcmd_withirq_core(h, c, 1);
2852
6b4d96b8 2853 cmd_special_free(h, c);
7c832835 2854 return return_status;
1da177e4 2855}
7c832835 2856
f70dba83 2857static void cciss_geometry_inquiry(ctlr_info_t *h, int logvol,
7b838bde 2858 sector_t total_size,
7c832835
BH		 2859 unsigned int block_size,
2860 InquiryData_struct *inq_buff,
2861 drive_info_struct *drv)
1da177e4
LT		 2862{
2863 int return_code;
00988a35 2864 unsigned long t;
b57695fe 2865 unsigned char scsi3addr[8];
00988a35 2866
1da177e4 2867 memset(inq_buff, 0, sizeof(InquiryData_struct));
f70dba83
SC		 2868 log_unit_to_scsi3addr(h, scsi3addr, logvol);
2869 return_code = sendcmd_withirq(h, CISS_INQUIRY, inq_buff,
7b838bde 2870 sizeof(*inq_buff), 0xC1, scsi3addr, TYPE_CMD);
1da177e4 2871 if (return_code == IO_OK) {
7c832835 2872 if (inq_buff->data_byte[8] == 0xFF) {
b2a4a43d
SC		 2873 dev_warn(&h->pdev->dev,
2874 "reading geometry failed, volume "
7c832835 2875 "does not support reading geometry\n");
1da177e4 2876 drv->heads = 255;
b028461d 2877 drv->sectors = 32; /* Sectors per track */
7f42d3b8 2878 drv->cylinders = total_size + 1;
89f97ad1 2879 drv->raid_level = RAID_UNKNOWN;
1da177e4 2880 } else {
1da177e4
LT		 2881 drv->heads = inq_buff->data_byte[6];
2882 drv->sectors = inq_buff->data_byte[7];
2883 drv->cylinders = (inq_buff->data_byte[4] & 0xff) << 8;
2884 drv->cylinders += inq_buff->data_byte[5];
2885 drv->raid_level = inq_buff->data_byte[8];
3f7705ea
MW		 2886 }
2887 drv->block_size = block_size;
97c06978 2888 drv->nr_blocks = total_size + 1;
3f7705ea
MW		 2889 t = drv->heads * drv->sectors;
2890 if (t > 1) {
97c06978
MMOD		 2891 sector_t real_size = total_size + 1;
2892 unsigned long rem = sector_div(real_size, t);
3f7705ea 2893 if (rem)
97c06978
MMOD		 2894 real_size++;
2895 drv->cylinders = real_size;
1da177e4 2896 }
7c832835 2897 } else { /* Get geometry failed */
b2a4a43d 2898 dev_warn(&h->pdev->dev, "reading geometry failed\n");
1da177e4 2899 }
1da177e4 2900}
7c832835 2901
1da177e4 2902static void
f70dba83 2903cciss_read_capacity(ctlr_info_t *h, int logvol, sector_t *total_size,
7c832835 2904 unsigned int *block_size)
1da177e4 2905{
00988a35 2906 ReadCapdata_struct *buf;
1da177e4 2907 int return_code;
b57695fe 2908 unsigned char scsi3addr[8];
1aebe187
MK		 2909
2910 buf = kzalloc(sizeof(ReadCapdata_struct), GFP_KERNEL);
2911 if (!buf) {
b2a4a43d 2912 dev_warn(&h->pdev->dev, "out of memory\n");
00988a35
MMOD		 2913 return;
2914 }
1aebe187 2915
f70dba83
SC		 2916 log_unit_to_scsi3addr(h, scsi3addr, logvol);
2917 return_code = sendcmd_withirq(h, CCISS_READ_CAPACITY, buf,
7b838bde 2918 sizeof(ReadCapdata_struct), 0, scsi3addr, TYPE_CMD);
1da177e4 2919 if (return_code == IO_OK) {
4c1f2b31
AV		 2920 *total_size = be32_to_cpu(*(__be32 *) buf->total_size);
2921 *block_size = be32_to_cpu(*(__be32 *) buf->block_size);
7c832835 2922 } else { /* read capacity command failed */
b2a4a43d 2923 dev_warn(&h->pdev->dev, "read capacity failed\n");
1da177e4
LT		 2924 *total_size = 0;
2925 *block_size = BLOCK_SIZE;
2926 }
00988a35 2927 kfree(buf);
00988a35
MMOD		 2928}
2929
f70dba83 2930static void cciss_read_capacity_16(ctlr_info_t *h, int logvol,
7b838bde 2931 sector_t *total_size, unsigned int *block_size)
00988a35
MMOD		 2932{
2933 ReadCapdata_struct_16 *buf;
2934 int return_code;
b57695fe 2935 unsigned char scsi3addr[8];
1aebe187
MK		 2936
2937 buf = kzalloc(sizeof(ReadCapdata_struct_16), GFP_KERNEL);
2938 if (!buf) {
b2a4a43d 2939 dev_warn(&h->pdev->dev, "out of memory\n");
00988a35
MMOD		 2940 return;
2941 }
1aebe187 2942
f70dba83
SC		 2943 log_unit_to_scsi3addr(h, scsi3addr, logvol);
2944 return_code = sendcmd_withirq(h, CCISS_READ_CAPACITY_16,
2945 buf, sizeof(ReadCapdata_struct_16),
7b838bde 2946 0, scsi3addr, TYPE_CMD);
00988a35 2947 if (return_code == IO_OK) {
4c1f2b31
AV		 2948 *total_size = be64_to_cpu(*(__be64 *) buf->total_size);
2949 *block_size = be32_to_cpu(*(__be32 *) buf->block_size);
00988a35 2950 } else { /* read capacity command failed */
b2a4a43d 2951 dev_warn(&h->pdev->dev, "read capacity failed\n");
00988a35
MMOD		 2952 *total_size = 0;
2953 *block_size = BLOCK_SIZE;
2954 }
b2a4a43d 2955 dev_info(&h->pdev->dev, " blocks= %llu block_size= %d\n",
97c06978 2956 (unsigned long long)*total_size+1, *block_size);
00988a35 2957 kfree(buf);
1da177e4
LT		 2958}
2959
1da177e4
LT		 2960static int cciss_revalidate(struct gendisk *disk)
2961{
2962 ctlr_info_t *h = get_host(disk);
2963 drive_info_struct *drv = get_drv(disk);
2964 int logvol;
7c832835 2965 int FOUND = 0;
1da177e4 2966 unsigned int block_size;
00988a35 2967 sector_t total_size;
1da177e4
LT		 2968 InquiryData_struct *inq_buff = NULL;
2969
68264e9d 2970 for (logvol = 0; logvol <= h->highest_lun; logvol++) {
0fc13c89 2971 if (!h->drv[logvol])
453434cf 2972 continue;
9cef0d2f 2973 if (memcmp(h->drv[logvol]->LunID, drv->LunID,
39ccf9a6 2974 sizeof(drv->LunID)) == 0) {
7c832835 2975 FOUND = 1;
1da177e4
LT		 2976 break;
2977 }
2978 }
2979
7c832835
BH		 2980 if (!FOUND)
2981 return 1;
1da177e4 2982
7c832835
BH		 2983 inq_buff = kmalloc(sizeof(InquiryData_struct), GFP_KERNEL);
2984 if (inq_buff == NULL) {
b2a4a43d 2985 dev_warn(&h->pdev->dev, "out of memory\n");
7c832835
BH		 2986 return 1;
2987 }
00988a35 2988 if (h->cciss_read == CCISS_READ_10) {
f70dba83 2989 cciss_read_capacity(h, logvol,
00988a35
MMOD		 2990 &total_size, &block_size);
2991 } else {
f70dba83 2992 cciss_read_capacity_16(h, logvol,
00988a35
MMOD		 2993 &total_size, &block_size);
2994 }
f70dba83 2995 cciss_geometry_inquiry(h, logvol, total_size, block_size,
7c832835 2996 inq_buff, drv);
1da177e4 2997
e1defc4f 2998 blk_queue_logical_block_size(drv->queue, drv->block_size);
1da177e4
LT		 2999 set_capacity(disk, drv->nr_blocks);
3000
1da177e4
LT		 3001 kfree(inq_buff);
3002 return 0;
3003}
3004
1da177e4
LT		 3005/*
3006 * Map (physical) PCI mem into (virtual) kernel space
3007 */
3008static void __iomem *remap_pci_mem(ulong base, ulong size)
3009{
7c832835
BH		 3010 ulong page_base = ((ulong) base) & PAGE_MASK;
3011 ulong page_offs = ((ulong) base) - page_base;
3012 void __iomem *page_remapped = ioremap(page_base, page_offs + size);
1da177e4 3013
7c832835 3014 return page_remapped ? (page_remapped + page_offs) : NULL;
1da177e4
LT		 3015}
3016
7c832835
BH		 3017/*
3018 * Takes jobs of the Q and sends them to the hardware, then puts it on
3019 * the Q to wait for completion.
3020 */
3021static void start_io(ctlr_info_t *h)
1da177e4
LT		 3022{
3023 CommandList_struct *c;
7c832835 3024
e6e1ee93
JA		 3025 while (!list_empty(&h->reqQ)) {
3026 c = list_entry(h->reqQ.next, CommandList_struct, list);
1da177e4
LT		 3027 /* can't do anything if fifo is full */
3028 if ((h->access.fifo_full(h))) {
b2a4a43d 3029 dev_warn(&h->pdev->dev, "fifo full\n");
1da177e4
LT		 3030 break;
3031 }
3032
7c832835 3033 /* Get the first entry from the Request Q */
8a3173de 3034 removeQ(c);
1da177e4 3035 h->Qdepth--;
7c832835
BH		 3036
3037 /* Tell the controller execute command */
1da177e4 3038 h->access.submit_command(h, c);
7c832835
BH		 3039
3040 /* Put job onto the completed Q */
8a3173de 3041 addQ(&h->cmpQ, c);
1da177e4
LT		 3042 }
3043}
7c832835 3044
f70dba83 3045/* Assumes that h->lock is held. */
1da177e4
LT		 3046/* Zeros out the error record and then resends the command back */
3047/* to the controller */
7c832835 3048static inline void resend_cciss_cmd(ctlr_info_t *h, CommandList_struct *c)
1da177e4
LT		 3049{
3050 /* erase the old error information */
3051 memset(c->err_info, 0, sizeof(ErrorInfo_struct));
3052
3053 /* add it to software queue and then send it to the controller */
8a3173de 3054 addQ(&h->reqQ, c);
1da177e4 3055 h->Qdepth++;
7c832835 3056 if (h->Qdepth > h->maxQsinceinit)
1da177e4
LT		 3057 h->maxQsinceinit = h->Qdepth;
3058
3059 start_io(h);
3060}
a9925a06 3061
1a614f50
SC		 3062static inline unsigned int make_status_bytes(unsigned int scsi_status_byte,
3063 unsigned int msg_byte, unsigned int host_byte,
3064 unsigned int driver_byte)
3065{
3066 /* inverse of macros in scsi.h */
3067 return (scsi_status_byte & 0xff) |
3068 ((msg_byte & 0xff) << 8) |
3069 ((host_byte & 0xff) << 16) |
3070 ((driver_byte & 0xff) << 24);
3071}
3072
0a9279cc
MM		 3073static inline int evaluate_target_status(ctlr_info_t *h,
3074 CommandList_struct *cmd, int *retry_cmd)
03bbfee5
MMOD		 3075{
3076 unsigned char sense_key;
1a614f50
SC		 3077 unsigned char status_byte, msg_byte, host_byte, driver_byte;
3078 int error_value;
3079
0a9279cc 3080 *retry_cmd = 0;
1a614f50
SC		 3081 /* If we get in here, it means we got "target status", that is, scsi status */
3082 status_byte = cmd->err_info->ScsiStatus;
3083 driver_byte = DRIVER_OK;
3084 msg_byte = cmd->err_info->CommandStatus; /* correct? seems too device specific */
3085
33659ebb 3086 if (cmd->rq->cmd_type == REQ_TYPE_BLOCK_PC)
1a614f50
SC		 3087 host_byte = DID_PASSTHROUGH;
3088 else
3089 host_byte = DID_OK;
3090
3091 error_value = make_status_bytes(status_byte, msg_byte,
3092 host_byte, driver_byte);
03bbfee5 3093
1a614f50 3094 if (cmd->err_info->ScsiStatus != SAM_STAT_CHECK_CONDITION) {
33659ebb 3095 if (cmd->rq->cmd_type != REQ_TYPE_BLOCK_PC)
b2a4a43d 3096 dev_warn(&h->pdev->dev, "cmd %p "
03bbfee5
MMOD		 3097 "has SCSI Status 0x%x\n",
3098 cmd, cmd->err_info->ScsiStatus);
1a614f50 3099 return error_value;
03bbfee5
MMOD		 3100 }
3101
3102 /* check the sense key */
3103 sense_key = 0xf & cmd->err_info->SenseInfo[2];
3104 /* no status or recovered error */
33659ebb
CH		 3105 if (((sense_key == 0x0) || (sense_key == 0x1)) &&
3106 (cmd->rq->cmd_type != REQ_TYPE_BLOCK_PC))
1a614f50 3107 error_value = 0;
03bbfee5 3108
0a9279cc 3109 if (check_for_unit_attention(h, cmd)) {
33659ebb 3110 *retry_cmd = !(cmd->rq->cmd_type == REQ_TYPE_BLOCK_PC);
0a9279cc
MM		 3111 return 0;
3112 }
3113
33659ebb
CH		 3114 /* Not SG_IO or similar? */
3115 if (cmd->rq->cmd_type != REQ_TYPE_BLOCK_PC) {
1a614f50 3116 if (error_value != 0)
b2a4a43d 3117 dev_warn(&h->pdev->dev, "cmd %p has CHECK CONDITION"
03bbfee5 3118 " sense key = 0x%x\n", cmd, sense_key);
1a614f50 3119 return error_value;
03bbfee5
MMOD		 3120 }
3121
82ed4db4 3122 scsi_req(cmd->rq)->sense_len = cmd->err_info->SenseLen;
1a614f50 3123 return error_value;
03bbfee5
MMOD		 3124}
3125
7c832835 3126/* checks the status of the job and calls complete buffers to mark all
a9925a06
JA		 3127 * buffers for the completed job. Note that this function does not need
3128 * to hold the hba/queue lock.
7c832835
BH		 3129 */
3130static inline void complete_command(ctlr_info_t *h, CommandList_struct *cmd,
3131 int timeout)
1da177e4 3132{
1da177e4 3133 int retry_cmd = 0;
198b7660
MMOD		 3134 struct request *rq = cmd->rq;
3135
3136 rq->errors = 0;
7c832835 3137
1da177e4 3138 if (timeout)
1a614f50 3139 rq->errors = make_status_bytes(0, 0, 0, DRIVER_TIMEOUT);
1da177e4 3140
d38ae168
MMOD		 3141 if (cmd->err_info->CommandStatus == 0) /* no error has occurred */
3142 goto after_error_processing;
7c832835 3143
d38ae168 3144 switch (cmd->err_info->CommandStatus) {
d38ae168 3145 case CMD_TARGET_STATUS:
0a9279cc 3146 rq->errors = evaluate_target_status(h, cmd, &retry_cmd);
d38ae168
MMOD		 3147 break;
3148 case CMD_DATA_UNDERRUN:
33659ebb 3149 if (cmd->rq->cmd_type == REQ_TYPE_FS) {
b2a4a43d 3150 dev_warn(&h->pdev->dev, "cmd %p has"
03bbfee5
MMOD		 3151 " completed with data underrun "
3152 "reported\n", cmd);
03bbfee5 3153 }
d38ae168
MMOD		 3154 break;
3155 case CMD_DATA_OVERRUN:
33659ebb 3156 if (cmd->rq->cmd_type == REQ_TYPE_FS)
b2a4a43d 3157 dev_warn(&h->pdev->dev, "cciss: cmd %p has"
03bbfee5
MMOD		 3158 " completed with data overrun "
3159 "reported\n", cmd);
d38ae168
MMOD		 3160 break;
3161 case CMD_INVALID:
b2a4a43d 3162 dev_warn(&h->pdev->dev, "cciss: cmd %p is "
d38ae168 3163 "reported invalid\n", cmd);
1a614f50
SC		 3164 rq->errors = make_status_bytes(SAM_STAT_GOOD,
3165 cmd->err_info->CommandStatus, DRIVER_OK,
33659ebb
CH		 3166 (cmd->rq->cmd_type == REQ_TYPE_BLOCK_PC) ?
3167 DID_PASSTHROUGH : DID_ERROR);
d38ae168
MMOD		 3168 break;
3169 case CMD_PROTOCOL_ERR:
b2a4a43d
SC		 3170 dev_warn(&h->pdev->dev, "cciss: cmd %p has "
3171 "protocol error\n", cmd);
1a614f50
SC		 3172 rq->errors = make_status_bytes(SAM_STAT_GOOD,
3173 cmd->err_info->CommandStatus, DRIVER_OK,
33659ebb
CH		 3174 (cmd->rq->cmd_type == REQ_TYPE_BLOCK_PC) ?
3175 DID_PASSTHROUGH : DID_ERROR);
d38ae168
MMOD		 3176 break;
3177 case CMD_HARDWARE_ERR:
b2a4a43d 3178 dev_warn(&h->pdev->dev, "cciss: cmd %p had "
d38ae168 3179 " hardware error\n", cmd);
1a614f50
SC		 3180 rq->errors = make_status_bytes(SAM_STAT_GOOD,
3181 cmd->err_info->CommandStatus, DRIVER_OK,
33659ebb
CH		 3182 (cmd->rq->cmd_type == REQ_TYPE_BLOCK_PC) ?
3183 DID_PASSTHROUGH : DID_ERROR);
d38ae168
MMOD		 3184 break;
3185 case CMD_CONNECTION_LOST:
b2a4a43d 3186 dev_warn(&h->pdev->dev, "cciss: cmd %p had "
d38ae168 3187 "connection lost\n", cmd);
1a614f50
SC		 3188 rq->errors = make_status_bytes(SAM_STAT_GOOD,
3189 cmd->err_info->CommandStatus, DRIVER_OK,
33659ebb
CH		 3190 (cmd->rq->cmd_type == REQ_TYPE_BLOCK_PC) ?
3191 DID_PASSTHROUGH : DID_ERROR);
d38ae168
MMOD		 3192 break;
3193 case CMD_ABORTED:
b2a4a43d 3194 dev_warn(&h->pdev->dev, "cciss: cmd %p was "
d38ae168 3195 "aborted\n", cmd);
1a614f50
SC		 3196 rq->errors = make_status_bytes(SAM_STAT_GOOD,
3197 cmd->err_info->CommandStatus, DRIVER_OK,
33659ebb
CH		 3198 (cmd->rq->cmd_type == REQ_TYPE_BLOCK_PC) ?
3199 DID_PASSTHROUGH : DID_ABORT);
d38ae168
MMOD		 3200 break;
3201 case CMD_ABORT_FAILED:
b2a4a43d 3202 dev_warn(&h->pdev->dev, "cciss: cmd %p reports "
d38ae168 3203 "abort failed\n", cmd);
1a614f50
SC		 3204 rq->errors = make_status_bytes(SAM_STAT_GOOD,
3205 cmd->err_info->CommandStatus, DRIVER_OK,
33659ebb
CH		 3206 (cmd->rq->cmd_type == REQ_TYPE_BLOCK_PC) ?
3207 DID_PASSTHROUGH : DID_ERROR);
d38ae168
MMOD		 3208 break;
3209 case CMD_UNSOLICITED_ABORT:
b2a4a43d 3210 dev_warn(&h->pdev->dev, "cciss%d: unsolicited "
d38ae168
MMOD		 3211 "abort %p\n", h->ctlr, cmd);
3212 if (cmd->retry_count < MAX_CMD_RETRIES) {
3213 retry_cmd = 1;
b2a4a43d 3214 dev_warn(&h->pdev->dev, "retrying %p\n", cmd);
d38ae168
MMOD		 3215 cmd->retry_count++;
3216 } else
b2a4a43d
SC		 3217 dev_warn(&h->pdev->dev,
3218 "%p retried too many times\n", cmd);
1a614f50
SC		 3219 rq->errors = make_status_bytes(SAM_STAT_GOOD,
3220 cmd->err_info->CommandStatus, DRIVER_OK,
33659ebb
CH		 3221 (cmd->rq->cmd_type == REQ_TYPE_BLOCK_PC) ?
3222 DID_PASSTHROUGH : DID_ABORT);
d38ae168
MMOD		 3223 break;
3224 case CMD_TIMEOUT:
b2a4a43d 3225 dev_warn(&h->pdev->dev, "cmd %p timedout\n", cmd);
1a614f50
SC		 3226 rq->errors = make_status_bytes(SAM_STAT_GOOD,
3227 cmd->err_info->CommandStatus, DRIVER_OK,
33659ebb
CH		 3228 (cmd->rq->cmd_type == REQ_TYPE_BLOCK_PC) ?
3229 DID_PASSTHROUGH : DID_ERROR);
d38ae168 3230 break;
6d9a4f9e
SC		 3231 case CMD_UNABORTABLE:
3232 dev_warn(&h->pdev->dev, "cmd %p unabortable\n", cmd);
3233 rq->errors = make_status_bytes(SAM_STAT_GOOD,
3234 cmd->err_info->CommandStatus, DRIVER_OK,
3235 cmd->rq->cmd_type == REQ_TYPE_BLOCK_PC ?
3236 DID_PASSTHROUGH : DID_ERROR);
3237 break;
d38ae168 3238 default:
b2a4a43d 3239 dev_warn(&h->pdev->dev, "cmd %p returned "
d38ae168
MMOD		 3240 "unknown status %x\n", cmd,
3241 cmd->err_info->CommandStatus);
1a614f50
SC		 3242 rq->errors = make_status_bytes(SAM_STAT_GOOD,
3243 cmd->err_info->CommandStatus, DRIVER_OK,
33659ebb
CH		 3244 (cmd->rq->cmd_type == REQ_TYPE_BLOCK_PC) ?
3245 DID_PASSTHROUGH : DID_ERROR);
1da177e4 3246 }
d38ae168
MMOD		 3247
3248after_error_processing:
3249
1da177e4 3250 /* We need to return this command */
7c832835
BH		 3251 if (retry_cmd) {
3252 resend_cciss_cmd(h, cmd);
1da177e4 3253 return;
7c832835 3254 }
03bbfee5 3255 cmd->rq->completion_data = cmd;
a9925a06 3256 blk_complete_request(cmd->rq);
1da177e4
LT		 3257}
3258
0c2b3908
MM		 3259static inline u32 cciss_tag_contains_index(u32 tag)
3260{
5e216153 3261#define DIRECT_LOOKUP_BIT 0x10
0c2b3908
MM		 3262 return tag & DIRECT_LOOKUP_BIT;
3263}
3264
3265static inline u32 cciss_tag_to_index(u32 tag)
3266{
5e216153 3267#define DIRECT_LOOKUP_SHIFT 5
0c2b3908
MM		 3268 return tag >> DIRECT_LOOKUP_SHIFT;
3269}
3270
0498cc2a 3271static inline u32 cciss_tag_discard_error_bits(ctlr_info_t *h, u32 tag)
0c2b3908 3272{
0498cc2a
SC		 3273#define CCISS_PERF_ERROR_BITS ((1 << DIRECT_LOOKUP_SHIFT) - 1)
3274#define CCISS_SIMPLE_ERROR_BITS 0x03
3275 if (likely(h->transMethod & CFGTBL_Trans_Performant))
3276 return tag & ~CCISS_PERF_ERROR_BITS;
3277 return tag & ~CCISS_SIMPLE_ERROR_BITS;
0c2b3908
MM		 3278}
3279
3280static inline void cciss_mark_tag_indexed(u32 *tag)
3281{
3282 *tag |= DIRECT_LOOKUP_BIT;
3283}
3284
3285static inline void cciss_set_tag_index(u32 *tag, u32 index)
3286{
3287 *tag |= (index << DIRECT_LOOKUP_SHIFT);
3288}
3289
7c832835
BH		 3290/*
3291 * Get a request and submit it to the controller.
1da177e4 3292 */
165125e1 3293static void do_cciss_request(struct request_queue *q)
1da177e4 3294{
7c832835 3295 ctlr_info_t *h = q->queuedata;
1da177e4 3296 CommandList_struct *c;
00988a35
MMOD		 3297 sector_t start_blk;
3298 int seg;
1da177e4
LT		 3299 struct request *creq;
3300 u64bit temp64;
5c07a311
DB		 3301 struct scatterlist *tmp_sg;
3302 SGDescriptor_struct *curr_sg;
1da177e4
LT		 3303 drive_info_struct *drv;
3304 int i, dir;
5c07a311
DB		 3305 int sg_index = 0;
3306 int chained = 0;
1da177e4 3307
7c832835 3308 queue:
9934c8c0 3309 creq = blk_peek_request(q);
1da177e4
LT		 3310 if (!creq)
3311 goto startio;
3312
5c07a311 3313 BUG_ON(creq->nr_phys_segments > h->maxsgentries);
1da177e4 3314
6b4d96b8
SC		 3315 c = cmd_alloc(h);
3316 if (!c)
1da177e4
LT		 3317 goto full;
3318
9934c8c0 3319 blk_start_request(creq);
1da177e4 3320
5c07a311 3321 tmp_sg = h->scatter_list[c->cmdindex];
1da177e4
LT		 3322 spin_unlock_irq(q->queue_lock);
3323
3324 c->cmd_type = CMD_RWREQ;
3325 c->rq = creq;
7c832835
BH		 3326
3327 /* fill in the request */
1da177e4 3328 drv = creq->rq_disk->private_data;
b028461d 3329 c->Header.ReplyQueue = 0; /* unused in simple mode */
33079b21
MM		 3330 /* got command from pool, so use the command block index instead */
3331 /* for direct lookups. */
3332 /* The first 2 bits are reserved for controller error reporting. */
0c2b3908
MM		 3333 cciss_set_tag_index(&c->Header.Tag.lower, c->cmdindex);
3334 cciss_mark_tag_indexed(&c->Header.Tag.lower);
39ccf9a6 3335 memcpy(&c->Header.LUN, drv->LunID, sizeof(drv->LunID));
b028461d 3336 c->Request.CDBLen = 10; /* 12 byte commands not in FW yet; */
3337 c->Request.Type.Type = TYPE_CMD; /* It is a command. */
7c832835
BH		 3338 c->Request.Type.Attribute = ATTR_SIMPLE;
3339 c->Request.Type.Direction =
a52de245 3340 (rq_data_dir(creq) == READ) ? XFER_READ : XFER_WRITE;
b028461d 3341 c->Request.Timeout = 0; /* Don't time out */
7c832835 3342 c->Request.CDB[0] =
00988a35 3343 (rq_data_dir(creq) == READ) ? h->cciss_read : h->cciss_write;
83096ebf 3344 start_blk = blk_rq_pos(creq);
b2a4a43d 3345 dev_dbg(&h->pdev->dev, "sector =%d nr_sectors=%d\n",
83096ebf 3346 (int)blk_rq_pos(creq), (int)blk_rq_sectors(creq));
5c07a311 3347 sg_init_table(tmp_sg, h->maxsgentries);
1da177e4
LT		 3348 seg = blk_rq_map_sg(q, creq, tmp_sg);
3349
7c832835 3350 /* get the DMA records for the setup */
1da177e4
LT		 3351 if (c->Request.Type.Direction == XFER_READ)
3352 dir = PCI_DMA_FROMDEVICE;
3353 else
3354 dir = PCI_DMA_TODEVICE;
3355
5c07a311
DB		 3356 curr_sg = c->SG;
3357 sg_index = 0;
3358 chained = 0;
3359
7c832835 3360 for (i = 0; i < seg; i++) {
5c07a311
DB		 3361 if (((sg_index+1) == (h->max_cmd_sgentries)) &&
3362 !chained && ((seg - i) > 1)) {
5c07a311 3363 /* Point to next chain block. */
dccc9b56 3364 curr_sg = h->cmd_sg_list[c->cmdindex];
5c07a311
DB		 3365 sg_index = 0;
3366 chained = 1;
3367 }
3368 curr_sg[sg_index].Len = tmp_sg[i].length;
45711f1a 3369 temp64.val = (__u64) pci_map_page(h->pdev, sg_page(&tmp_sg[i]),
5c07a311
DB		 3370 tmp_sg[i].offset,
3371 tmp_sg[i].length, dir);
3372 curr_sg[sg_index].Addr.lower = temp64.val32.lower;
3373 curr_sg[sg_index].Addr.upper = temp64.val32.upper;
3374 curr_sg[sg_index].Ext = 0; /* we are not chaining */
5c07a311 3375 ++sg_index;
1da177e4 3376 }
d45033ef
SC		 3377 if (chained)
3378 cciss_map_sg_chain_block(h, c, h->cmd_sg_list[c->cmdindex],
3379 (seg - (h->max_cmd_sgentries - 1)) *
3380 sizeof(SGDescriptor_struct));
5c07a311 3381
7c832835
BH		 3382 /* track how many SG entries we are using */
3383 if (seg > h->maxSG)
3384 h->maxSG = seg;
1da177e4 3385
b2a4a43d 3386 dev_dbg(&h->pdev->dev, "Submitting %u sectors in %d segments "
5c07a311
DB		 3387 "chained[%d]\n",
3388 blk_rq_sectors(creq), seg, chained);
1da177e4 3389
5e216153
MM		 3390 c->Header.SGTotal = seg + chained;
3391 if (seg <= h->max_cmd_sgentries)
3392 c->Header.SGList = c->Header.SGTotal;
3393 else
5c07a311 3394 c->Header.SGList = h->max_cmd_sgentries;
5e216153 3395 set_performant_mode(h, c);
5c07a311 3396
33659ebb 3397 if (likely(creq->cmd_type == REQ_TYPE_FS)) {
03bbfee5
MMOD		 3398 if(h->cciss_read == CCISS_READ_10) {
3399 c->Request.CDB[1] = 0;
b028461d 3400 c->Request.CDB[2] = (start_blk >> 24) & 0xff; /* MSB */
03bbfee5
MMOD		 3401 c->Request.CDB[3] = (start_blk >> 16) & 0xff;
3402 c->Request.CDB[4] = (start_blk >> 8) & 0xff;
3403 c->Request.CDB[5] = start_blk & 0xff;
b028461d 3404 c->Request.CDB[6] = 0; /* (sect >> 24) & 0xff; MSB */
83096ebf
TH		 3405 c->Request.CDB[7] = (blk_rq_sectors(creq) >> 8) & 0xff;
3406 c->Request.CDB[8] = blk_rq_sectors(creq) & 0xff;
03bbfee5
MMOD		 3407 c->Request.CDB[9] = c->Request.CDB[11] = c->Request.CDB[12] = 0;
3408 } else {
582539e5
RD		 3409 u32 upper32 = upper_32_bits(start_blk);
3410
03bbfee5
MMOD		 3411 c->Request.CDBLen = 16;
3412 c->Request.CDB[1]= 0;
b028461d 3413 c->Request.CDB[2]= (upper32 >> 24) & 0xff; /* MSB */
582539e5
RD		 3414 c->Request.CDB[3]= (upper32 >> 16) & 0xff;
3415 c->Request.CDB[4]= (upper32 >> 8) & 0xff;
3416 c->Request.CDB[5]= upper32 & 0xff;
03bbfee5
MMOD		 3417 c->Request.CDB[6]= (start_blk >> 24) & 0xff;
3418 c->Request.CDB[7]= (start_blk >> 16) & 0xff;
3419 c->Request.CDB[8]= (start_blk >> 8) & 0xff;
3420 c->Request.CDB[9]= start_blk & 0xff;
83096ebf
TH		 3421 c->Request.CDB[10]= (blk_rq_sectors(creq) >> 24) & 0xff;
3422 c->Request.CDB[11]= (blk_rq_sectors(creq) >> 16) & 0xff;
3423 c->Request.CDB[12]= (blk_rq_sectors(creq) >> 8) & 0xff;
3424 c->Request.CDB[13]= blk_rq_sectors(creq) & 0xff;
03bbfee5
MMOD		 3425 c->Request.CDB[14] = c->Request.CDB[15] = 0;
3426 }
33659ebb 3427 } else if (creq->cmd_type == REQ_TYPE_BLOCK_PC) {
82ed4db4
CH		 3428 c->Request.CDBLen = scsi_req(creq)->cmd_len;
3429 memcpy(c->Request.CDB, scsi_req(creq)->cmd, BLK_MAX_CDB);
3430 scsi_req(creq)->sense = c->err_info->SenseInfo;
00988a35 3431 } else {
b2a4a43d
SC		 3432 dev_warn(&h->pdev->dev, "bad request type %d\n",
3433 creq->cmd_type);
03bbfee5 3434 BUG();
00988a35 3435 }
1da177e4
LT		 3436
3437 spin_lock_irq(q->queue_lock);
3438
8a3173de 3439 addQ(&h->reqQ, c);
1da177e4 3440 h->Qdepth++;
7c832835
BH		 3441 if (h->Qdepth > h->maxQsinceinit)
3442 h->maxQsinceinit = h->Qdepth;
1da177e4
LT		 3443
3444 goto queue;
00988a35 3445full:
1da177e4 3446 blk_stop_queue(q);
00988a35 3447startio:
1da177e4
LT		 3448 /* We will already have the driver lock here so not need
3449 * to lock it.
7c832835 3450 */
1da177e4
LT		 3451 start_io(h);
3452}
3453
3da8b713 3454static inline unsigned long get_next_completion(ctlr_info_t *h)
3455{
3da8b713 3456 return h->access.command_completed(h);
3da8b713 3457}
3458
3459static inline int interrupt_pending(ctlr_info_t *h)
3460{
3da8b713 3461 return h->access.intr_pending(h);
3da8b713 3462}
3463
3464static inline long interrupt_not_for_us(ctlr_info_t *h)
3465{
81125860 3466 return ((h->access.intr_pending(h) == 0) ||
2cf3af1c 3467 (h->interrupts_enabled == 0));
3da8b713 3468}
3469
0c2b3908
MM		 3470static inline int bad_tag(ctlr_info_t *h, u32 tag_index,
3471 u32 raw_tag)
1da177e4 3472{
0c2b3908
MM		 3473 if (unlikely(tag_index >= h->nr_cmds)) {
3474 dev_warn(&h->pdev->dev, "bad tag 0x%08x ignored.\n", raw_tag);
3475 return 1;
3476 }
3477 return 0;
3478}
3479
3480static inline void finish_cmd(ctlr_info_t *h, CommandList_struct *c,
3481 u32 raw_tag)
3482{
3483 removeQ(c);
3484 if (likely(c->cmd_type == CMD_RWREQ))
3485 complete_command(h, c, 0);
3486 else if (c->cmd_type == CMD_IOCTL_PEND)
3487 complete(c->waiting);
3488#ifdef CONFIG_CISS_SCSI_TAPE
3489 else if (c->cmd_type == CMD_SCSI)
3490 complete_scsi_command(c, 0, raw_tag);
3491#endif
3492}
3493
29979a71
MM		 3494static inline u32 next_command(ctlr_info_t *h)
3495{
3496 u32 a;
3497
0498cc2a 3498 if (unlikely(!(h->transMethod & CFGTBL_Trans_Performant)))
29979a71
MM		 3499 return h->access.command_completed(h);
3500
3501 if ((*(h->reply_pool_head) & 1) == (h->reply_pool_wraparound)) {
3502 a = *(h->reply_pool_head); /* Next cmd in ring buffer */
3503 (h->reply_pool_head)++;
3504 h->commands_outstanding--;
3505 } else {
3506 a = FIFO_EMPTY;
3507 }
3508 /* Check for wraparound */
3509 if (h->reply_pool_head == (h->reply_pool + h->max_commands)) {
3510 h->reply_pool_head = h->reply_pool;
3511 h->reply_pool_wraparound ^= 1;
3512 }
3513 return a;
3514}
3515
0c2b3908
MM		 3516/* process completion of an indexed ("direct lookup") command */
3517static inline u32 process_indexed_cmd(ctlr_info_t *h, u32 raw_tag)
3518{
3519 u32 tag_index;
1da177e4 3520 CommandList_struct *c;
0c2b3908
MM		 3521
3522 tag_index = cciss_tag_to_index(raw_tag);
3523 if (bad_tag(h, tag_index, raw_tag))
5e216153 3524 return next_command(h);
0c2b3908
MM		 3525 c = h->cmd_pool + tag_index;
3526 finish_cmd(h, c, raw_tag);
5e216153 3527 return next_command(h);
0c2b3908
MM		 3528}
3529
3530/* process completion of a non-indexed command */
3531static inline u32 process_nonindexed_cmd(ctlr_info_t *h, u32 raw_tag)
3532{
0c2b3908 3533 CommandList_struct *c = NULL;
0c2b3908
MM		 3534 __u32 busaddr_masked, tag_masked;
3535
0498cc2a 3536 tag_masked = cciss_tag_discard_error_bits(h, raw_tag);
e6e1ee93 3537 list_for_each_entry(c, &h->cmpQ, list) {
0498cc2a 3538 busaddr_masked = cciss_tag_discard_error_bits(h, c->busaddr);
0c2b3908
MM		 3539 if (busaddr_masked == tag_masked) {
3540 finish_cmd(h, c, raw_tag);
5e216153 3541 return next_command(h);
0c2b3908
MM		 3542 }
3543 }
3544 bad_tag(h, h->nr_cmds + 1, raw_tag);
5e216153 3545 return next_command(h);
0c2b3908
MM		 3546}
3547
5afe2781
SC		 3548/* Some controllers, like p400, will give us one interrupt
3549 * after a soft reset, even if we turned interrupts off.
3550 * Only need to check for this in the cciss_xxx_discard_completions
3551 * functions.
3552 */
3553static int ignore_bogus_interrupt(ctlr_info_t *h)
3554{
3555 if (likely(!reset_devices))
3556 return 0;
3557
3558 if (likely(h->interrupts_enabled))
3559 return 0;
3560
3561 dev_info(&h->pdev->dev, "Received interrupt while interrupts disabled "
3562 "(known firmware bug.) Ignoring.\n");
3563
3564 return 1;
3565}
3566
3567static irqreturn_t cciss_intx_discard_completions(int irq, void *dev_id)
3568{
3569 ctlr_info_t *h = dev_id;
3570 unsigned long flags;
3571 u32 raw_tag;
3572
3573 if (ignore_bogus_interrupt(h))
3574 return IRQ_NONE;
3575
3576 if (interrupt_not_for_us(h))
3577 return IRQ_NONE;
3578 spin_lock_irqsave(&h->lock, flags);
3579 while (interrupt_pending(h)) {
3580 raw_tag = get_next_completion(h);
3581 while (raw_tag != FIFO_EMPTY)
3582 raw_tag = next_command(h);
3583 }
3584 spin_unlock_irqrestore(&h->lock, flags);
3585 return IRQ_HANDLED;
3586}
3587
3588static irqreturn_t cciss_msix_discard_completions(int irq, void *dev_id)
3589{
3590 ctlr_info_t *h = dev_id;
3591 unsigned long flags;
3592 u32 raw_tag;
3593
3594 if (ignore_bogus_interrupt(h))
3595 return IRQ_NONE;
3596
3597 spin_lock_irqsave(&h->lock, flags);
3598 raw_tag = get_next_completion(h);
3599 while (raw_tag != FIFO_EMPTY)
3600 raw_tag = next_command(h);
3601 spin_unlock_irqrestore(&h->lock, flags);
3602 return IRQ_HANDLED;
3603}
3604
0c2b3908
MM		 3605static irqreturn_t do_cciss_intx(int irq, void *dev_id)
3606{
3607 ctlr_info_t *h = dev_id;
1da177e4 3608 unsigned long flags;
0c2b3908 3609 u32 raw_tag;
1da177e4 3610
3da8b713 3611 if (interrupt_not_for_us(h))
1da177e4 3612 return IRQ_NONE;
f70dba83 3613 spin_lock_irqsave(&h->lock, flags);
3da8b713 3614 while (interrupt_pending(h)) {
0c2b3908
MM		 3615 raw_tag = get_next_completion(h);
3616 while (raw_tag != FIFO_EMPTY) {
3617 if (cciss_tag_contains_index(raw_tag))
3618 raw_tag = process_indexed_cmd(h, raw_tag);
3619 else
3620 raw_tag = process_nonindexed_cmd(h, raw_tag);
1da177e4
LT		 3621 }
3622 }
f70dba83 3623 spin_unlock_irqrestore(&h->lock, flags);
0c2b3908
MM		 3624 return IRQ_HANDLED;
3625}
1da177e4 3626
0c2b3908
MM		 3627/* Add a second interrupt handler for MSI/MSI-X mode. In this mode we never
3628 * check the interrupt pending register because it is not set.
3629 */
3630static irqreturn_t do_cciss_msix_intr(int irq, void *dev_id)
3631{
3632 ctlr_info_t *h = dev_id;
3633 unsigned long flags;
3634 u32 raw_tag;
8a3173de 3635
f70dba83 3636 spin_lock_irqsave(&h->lock, flags);
0c2b3908
MM		 3637 raw_tag = get_next_completion(h);
3638 while (raw_tag != FIFO_EMPTY) {
3639 if (cciss_tag_contains_index(raw_tag))
3640 raw_tag = process_indexed_cmd(h, raw_tag);
3641 else
3642 raw_tag = process_nonindexed_cmd(h, raw_tag);
1da177e4 3643 }
f70dba83 3644 spin_unlock_irqrestore(&h->lock, flags);
1da177e4
LT		 3645 return IRQ_HANDLED;
3646}
7c832835 3647
b368c9dd
AP		 3648/**
3649 * add_to_scan_list() - add controller to rescan queue
3650 * @h: Pointer to the controller.
3651 *
3652 * Adds the controller to the rescan queue if not already on the queue.
3653 *
3654 * returns 1 if added to the queue, 0 if skipped (could be on the
3655 * queue already, or the controller could be initializing or shutting
3656 * down).
3657 **/
3658static int add_to_scan_list(struct ctlr_info *h)
3659{
3660 struct ctlr_info *test_h;
3661 int found = 0;
3662 int ret = 0;
3663
3664 if (h->busy_initializing)
3665 return 0;
3666
3667 if (!mutex_trylock(&h->busy_shutting_down))
3668 return 0;
3669
3670 mutex_lock(&scan_mutex);
3671 list_for_each_entry(test_h, &scan_q, scan_list) {
3672 if (test_h == h) {
3673 found = 1;
3674 break;
3675 }
3676 }
3677 if (!found && !h->busy_scanning) {
16735d02 3678 reinit_completion(&h->scan_wait);
b368c9dd
AP		 3679 list_add_tail(&h->scan_list, &scan_q);
3680 ret = 1;
3681 }
3682 mutex_unlock(&scan_mutex);
3683 mutex_unlock(&h->busy_shutting_down);
3684
3685 return ret;
3686}
3687
3688/**
3689 * remove_from_scan_list() - remove controller from rescan queue
3690 * @h: Pointer to the controller.
3691 *
3692 * Removes the controller from the rescan queue if present. Blocks if
fd8489cf
SC		 3693 * the controller is currently conducting a rescan. The controller
3694 * can be in one of three states:
3695 * 1. Doesn't need a scan
3696 * 2. On the scan list, but not scanning yet (we remove it)
3697 * 3. Busy scanning (and not on the list). In this case we want to wait for
3698 * the scan to complete to make sure the scanning thread for this
3699 * controller is completely idle.
b368c9dd
AP		 3700 **/
3701static void remove_from_scan_list(struct ctlr_info *h)
3702{
3703 struct ctlr_info *test_h, *tmp_h;
b368c9dd
AP		 3704
3705 mutex_lock(&scan_mutex);
3706 list_for_each_entry_safe(test_h, tmp_h, &scan_q, scan_list) {
fd8489cf 3707 if (test_h == h) { /* state 2. */
b368c9dd
AP		 3708 list_del(&h->scan_list);
3709 complete_all(&h->scan_wait);
3710 mutex_unlock(&scan_mutex);
3711 return;
3712 }
3713 }
fd8489cf
SC		 3714 if (h->busy_scanning) { /* state 3. */
3715 mutex_unlock(&scan_mutex);
b368c9dd 3716 wait_for_completion(&h->scan_wait);
fd8489cf
SC		 3717 } else { /* state 1, nothing to do. */
3718 mutex_unlock(&scan_mutex);
3719 }
b368c9dd
AP		 3720}
3721
3722/**
3723 * scan_thread() - kernel thread used to rescan controllers
3724 * @data: Ignored.
3725 *
3726 * A kernel thread used scan for drive topology changes on
3727 * controllers. The thread processes only one controller at a time
3728 * using a queue. Controllers are added to the queue using
3729 * add_to_scan_list() and removed from the queue either after done
3730 * processing or using remove_from_scan_list().
3731 *
3732 * returns 0.
3733 **/
0a9279cc
MM		 3734static int scan_thread(void *data)
3735{
b368c9dd 3736 struct ctlr_info *h;
0a9279cc 3737
b368c9dd
AP		 3738 while (1) {
3739 set_current_state(TASK_INTERRUPTIBLE);
3740 schedule();
0a9279cc
MM		 3741 if (kthread_should_stop())
3742 break;
b368c9dd
AP		 3743
3744 while (1) {
3745 mutex_lock(&scan_mutex);
3746 if (list_empty(&scan_q)) {
3747 mutex_unlock(&scan_mutex);
3748 break;
3749 }
3750
3751 h = list_entry(scan_q.next,
3752 struct ctlr_info,
3753 scan_list);
3754 list_del(&h->scan_list);
3755 h->busy_scanning = 1;
3756 mutex_unlock(&scan_mutex);
3757
d06dfbd2
SC		 3758 rebuild_lun_table(h, 0, 0);
3759 complete_all(&h->scan_wait);
3760 mutex_lock(&scan_mutex);
3761 h->busy_scanning = 0;
3762 mutex_unlock(&scan_mutex);
b368c9dd 3763 }
0a9279cc 3764 }
b368c9dd 3765
0a9279cc
MM		 3766 return 0;
3767}
3768
3769static int check_for_unit_attention(ctlr_info_t *h, CommandList_struct *c)
3770{
3771 if (c->err_info->SenseInfo[2] != UNIT_ATTENTION)
3772 return 0;
3773
3774 switch (c->err_info->SenseInfo[12]) {
3775 case STATE_CHANGED:
b2a4a43d
SC		 3776 dev_warn(&h->pdev->dev, "a state change "
3777 "detected, command retried\n");
0a9279cc
MM		 3778 return 1;
3779 break;
3780 case LUN_FAILED:
b2a4a43d
SC		 3781 dev_warn(&h->pdev->dev, "LUN failure "
3782 "detected, action required\n");
0a9279cc
MM		 3783 return 1;
3784 break;
3785 case REPORT_LUNS_CHANGED:
b2a4a43d 3786 dev_warn(&h->pdev->dev, "report LUN data changed\n");
da002184
SC		 3787 /*
3788 * Here, we could call add_to_scan_list and wake up the scan thread,
3789 * except that it's quite likely that we will get more than one
3790 * REPORT_LUNS_CHANGED condition in quick succession, which means
3791 * that those which occur after the first one will likely happen
3792 * *during* the scan_thread's rescan. And the rescan code is not
3793 * robust enough to restart in the middle, undoing what it has already
3794 * done, and it's not clear that it's even possible to do this, since
3795 * part of what it does is notify the block layer, which starts
3796 * doing it's own i/o to read partition tables and so on, and the
3797 * driver doesn't have visibility to know what might need undoing.
3798 * In any event, if possible, it is horribly complicated to get right
3799 * so we just don't do it for now.
3800 *
3801 * Note: this REPORT_LUNS_CHANGED condition only occurs on the MSA2012.
3802 */
0a9279cc
MM		 3803 return 1;
3804 break;
3805 case POWER_OR_RESET:
b2a4a43d
SC		 3806 dev_warn(&h->pdev->dev,
3807 "a power on or device reset detected\n");
0a9279cc
MM		 3808 return 1;
3809 break;
3810 case UNIT_ATTENTION_CLEARED:
b2a4a43d
SC		 3811 dev_warn(&h->pdev->dev,
3812 "unit attention cleared by another initiator\n");
0a9279cc
MM		 3813 return 1;
3814 break;
3815 default:
b2a4a43d
SC		 3816 dev_warn(&h->pdev->dev, "unknown unit attention detected\n");
3817 return 1;
0a9279cc
MM		 3818 }
3819}
3820
7c832835 3821/*
d14c4ab5 3822 * We cannot read the structure directly, for portability we must use
1da177e4 3823 * the io functions.
7c832835 3824 * This is for debug only.
1da177e4 3825 */
b2a4a43d 3826static void print_cfg_table(ctlr_info_t *h)
1da177e4
LT		 3827{
3828 int i;
3829 char temp_name[17];
b2a4a43d 3830 CfgTable_struct *tb = h->cfgtable;
1da177e4 3831
b2a4a43d
SC		 3832 dev_dbg(&h->pdev->dev, "Controller Configuration information\n");
3833 dev_dbg(&h->pdev->dev, "------------------------------------\n");
7c832835 3834 for (i = 0; i < 4; i++)
1da177e4 3835 temp_name[i] = readb(&(tb->Signature[i]));
7c832835 3836 temp_name[4] = '\0';
b2a4a43d
SC		 3837 dev_dbg(&h->pdev->dev, " Signature = %s\n", temp_name);
3838 dev_dbg(&h->pdev->dev, " Spec Number = %d\n",
3839 readl(&(tb->SpecValence)));
3840 dev_dbg(&h->pdev->dev, " Transport methods supported = 0x%x\n",
7c832835 3841 readl(&(tb->TransportSupport)));
b2a4a43d 3842 dev_dbg(&h->pdev->dev, " Transport methods active = 0x%x\n",
7c832835 3843 readl(&(tb->TransportActive)));
b2a4a43d 3844 dev_dbg(&h->pdev->dev, " Requested transport Method = 0x%x\n",
7c832835 3845 readl(&(tb->HostWrite.TransportRequest)));
b2a4a43d 3846 dev_dbg(&h->pdev->dev, " Coalesce Interrupt Delay = 0x%x\n",
7c832835 3847 readl(&(tb->HostWrite.CoalIntDelay)));
b2a4a43d 3848 dev_dbg(&h->pdev->dev, " Coalesce Interrupt Count = 0x%x\n",
7c832835 3849 readl(&(tb->HostWrite.CoalIntCount)));
a8036dfb 3850 dev_dbg(&h->pdev->dev, " Max outstanding commands = 0x%x\n",
7c832835 3851 readl(&(tb->CmdsOutMax)));
b2a4a43d
SC		 3852 dev_dbg(&h->pdev->dev, " Bus Types = 0x%x\n",
3853 readl(&(tb->BusTypes)));
7c832835 3854 for (i = 0; i < 16; i++)
1da177e4
LT		 3855 temp_name[i] = readb(&(tb->ServerName[i]));
3856 temp_name[16] = '\0';
b2a4a43d
SC		 3857 dev_dbg(&h->pdev->dev, " Server Name = %s\n", temp_name);
3858 dev_dbg(&h->pdev->dev, " Heartbeat Counter = 0x%x\n\n\n",
3859 readl(&(tb->HeartBeat)));
1da177e4 3860}
1da177e4 3861
7c832835 3862static int find_PCI_BAR_index(struct pci_dev *pdev, unsigned long pci_bar_addr)
1da177e4
LT		 3863{
3864 int i, offset, mem_type, bar_type;
7c832835 3865 if (pci_bar_addr == PCI_BASE_ADDRESS_0) /* looking for BAR zero? */
1da177e4
LT		 3866 return 0;
3867 offset = 0;
7c832835
BH		 3868 for (i = 0; i < DEVICE_COUNT_RESOURCE; i++) {
3869 bar_type = pci_resource_flags(pdev, i) & PCI_BASE_ADDRESS_SPACE;
1da177e4
LT		 3870 if (bar_type == PCI_BASE_ADDRESS_SPACE_IO)
3871 offset += 4;
3872 else {
3873 mem_type = pci_resource_flags(pdev, i) &
7c832835 3874 PCI_BASE_ADDRESS_MEM_TYPE_MASK;
1da177e4 3875 switch (mem_type) {
7c832835
BH		 3876 case PCI_BASE_ADDRESS_MEM_TYPE_32:
3877 case PCI_BASE_ADDRESS_MEM_TYPE_1M:
3878 offset += 4; /* 32 bit */
3879 break;
3880 case PCI_BASE_ADDRESS_MEM_TYPE_64:
3881 offset += 8;
3882 break;
3883 default: /* reserved in PCI 2.2 */
b2a4a43d 3884 dev_warn(&pdev->dev,
7c832835
BH		 3885 "Base address is invalid\n");
3886 return -1;
1da177e4
LT		 3887 break;
3888 }
3889 }
7c832835
BH		 3890 if (offset == pci_bar_addr - PCI_BASE_ADDRESS_0)
3891 return i + 1;
1da177e4
LT		 3892 }
3893 return -1;
3894}
3895
5e216153
MM		 3896/* Fill in bucket_map[], given nsgs (the max number of
3897 * scatter gather elements supported) and bucket[],
3898 * which is an array of 8 integers. The bucket[] array
3899 * contains 8 different DMA transfer sizes (in 16
3900 * byte increments) which the controller uses to fetch
3901 * commands. This function fills in bucket_map[], which
3902 * maps a given number of scatter gather elements to one of
3903 * the 8 DMA transfer sizes. The point of it is to allow the
3904 * controller to only do as much DMA as needed to fetch the
3905 * command, with the DMA transfer size encoded in the lower
3906 * bits of the command address.
3907 */
3908static void calc_bucket_map(int bucket[], int num_buckets,
3909 int nsgs, int *bucket_map)
3910{
3911 int i, j, b, size;
3912
3913 /* even a command with 0 SGs requires 4 blocks */
3914#define MINIMUM_TRANSFER_BLOCKS 4
3915#define NUM_BUCKETS 8
3916 /* Note, bucket_map must have nsgs+1 entries. */
3917 for (i = 0; i <= nsgs; i++) {
3918 /* Compute size of a command with i SG entries */
3919 size = i + MINIMUM_TRANSFER_BLOCKS;
3920 b = num_buckets; /* Assume the biggest bucket */
3921 /* Find the bucket that is just big enough */
3922 for (j = 0; j < 8; j++) {
3923 if (bucket[j] >= size) {
3924 b = j;
3925 break;
3926 }
3927 }
3928 /* for a command with i SG entries, use bucket b. */
3929 bucket_map[i] = b;
3930 }
3931}
3932
8d85fce7 3933static void cciss_wait_for_mode_change_ack(ctlr_info_t *h)
0f8a6a1e
SC		 3934{
3935 int i;
3936
3937 /* under certain very rare conditions, this can take awhile.
3938 * (e.g.: hot replace a failed 144GB drive in a RAID 5 set right
3939 * as we enter this code.) */
3940 for (i = 0; i < MAX_CONFIG_WAIT; i++) {
3941 if (!(readl(h->vaddr + SA5_DOORBELL) & CFGTBL_ChangeReq))
3942 break;
332c2f80 3943 usleep_range(10000, 20000);
0f8a6a1e
SC		 3944 }
3945}
3946
8d85fce7 3947static void cciss_enter_performant_mode(ctlr_info_t *h, u32 use_short_tags)
b9933135
SC		 3948{
3949 /* This is a bit complicated. There are 8 registers on
3950 * the controller which we write to to tell it 8 different
3951 * sizes of commands which there may be. It's a way of
3952 * reducing the DMA done to fetch each command. Encoded into
3953 * each command's tag are 3 bits which communicate to the controller
3954 * which of the eight sizes that command fits within. The size of
3955 * each command depends on how many scatter gather entries there are.
3956 * Each SG entry requires 16 bytes. The eight registers are programmed
3957 * with the number of 16-byte blocks a command of that size requires.
3958 * The smallest command possible requires 5 such 16 byte blocks.
3959 * the largest command possible requires MAXSGENTRIES + 4 16-byte
3960 * blocks. Note, this only extends to the SG entries contained
3961 * within the command block, and does not extend to chained blocks
3962 * of SG elements. bft[] contains the eight values we write to
3963 * the registers. They are not evenly distributed, but have more
3964 * sizes for small commands, and fewer sizes for larger commands.
3965 */
5e216153 3966 __u32 trans_offset;
b9933135 3967 int bft[8] = { 5, 6, 8, 10, 12, 20, 28, MAXSGENTRIES + 4};
5e216153
MM		 3968 /*
3969 * 5 = 1 s/g entry or 4k
3970 * 6 = 2 s/g entry or 8k
3971 * 8 = 4 s/g entry or 16k
3972 * 10 = 6 s/g entry or 24k
3973 */
5e216153 3974 unsigned long register_value;
5e216153
MM		 3975 BUILD_BUG_ON(28 > MAXSGENTRIES + 4);
3976
5e216153
MM		 3977 h->reply_pool_wraparound = 1; /* spec: init to 1 */
3978
3979 /* Controller spec: zero out this buffer. */
3980 memset(h->reply_pool, 0, h->max_commands * sizeof(__u64));
3981 h->reply_pool_head = h->reply_pool;
3982
3983 trans_offset = readl(&(h->cfgtable->TransMethodOffset));
3984 calc_bucket_map(bft, ARRAY_SIZE(bft), h->maxsgentries,
3985 h->blockFetchTable);
3986 writel(bft[0], &h->transtable->BlockFetch0);
3987 writel(bft[1], &h->transtable->BlockFetch1);
3988 writel(bft[2], &h->transtable->BlockFetch2);
3989 writel(bft[3], &h->transtable->BlockFetch3);
3990 writel(bft[4], &h->transtable->BlockFetch4);
3991 writel(bft[5], &h->transtable->BlockFetch5);
3992 writel(bft[6], &h->transtable->BlockFetch6);
3993 writel(bft[7], &h->transtable->BlockFetch7);
3994
3995 /* size of controller ring buffer */
3996 writel(h->max_commands, &h->transtable->RepQSize);
3997 writel(1, &h->transtable->RepQCount);
3998 writel(0, &h->transtable->RepQCtrAddrLow32);
3999 writel(0, &h->transtable->RepQCtrAddrHigh32);
4000 writel(h->reply_pool_dhandle, &h->transtable->RepQAddr0Low32);
4001 writel(0, &h->transtable->RepQAddr0High32);
0498cc2a 4002 writel(CFGTBL_Trans_Performant | use_short_tags,
5e216153
MM		 4003 &(h->cfgtable->HostWrite.TransportRequest));
4004
5e216153 4005 writel(CFGTBL_ChangeReq, h->vaddr + SA5_DOORBELL);
0f8a6a1e 4006 cciss_wait_for_mode_change_ack(h);
5e216153 4007 register_value = readl(&(h->cfgtable->TransportActive));
b9933135 4008 if (!(register_value & CFGTBL_Trans_Performant))
b2a4a43d 4009 dev_warn(&h->pdev->dev, "cciss: unable to get board into"
5e216153 4010 " performant mode\n");
b9933135
SC		 4011}
4012
8d85fce7 4013static void cciss_put_controller_into_performant_mode(ctlr_info_t *h)
b9933135
SC		 4014{
4015 __u32 trans_support;
4016
13049537
JH		 4017 if (cciss_simple_mode)
4018 return;
4019
b9933135
SC		 4020 dev_dbg(&h->pdev->dev, "Trying to put board into Performant mode\n");
4021 /* Attempt to put controller into performant mode if supported */
4022 /* Does board support performant mode? */
4023 trans_support = readl(&(h->cfgtable->TransportSupport));
4024 if (!(trans_support & PERFORMANT_MODE))
4025 return;
4026
b2a4a43d 4027 dev_dbg(&h->pdev->dev, "Placing controller into performant mode\n");
b9933135
SC		 4028 /* Performant mode demands commands on a 32 byte boundary
4029 * pci_alloc_consistent aligns on page boundarys already.
4030 * Just need to check if divisible by 32
4031 */
4032 if ((sizeof(CommandList_struct) % 32) != 0) {
b2a4a43d 4033 dev_warn(&h->pdev->dev, "%s %d %s\n",
b9933135
SC		 4034 "cciss info: command size[",
4035 (int)sizeof(CommandList_struct),
4036 "] not divisible by 32, no performant mode..\n");
5e216153
MM		 4037 return;
4038 }
4039
b9933135
SC		 4040 /* Performant mode ring buffer and supporting data structures */
4041 h->reply_pool = (__u64 *)pci_alloc_consistent(
4042 h->pdev, h->max_commands * sizeof(__u64),
4043 &(h->reply_pool_dhandle));
4044
4045 /* Need a block fetch table for performant mode */
4046 h->blockFetchTable = kmalloc(((h->maxsgentries+1) *
4047 sizeof(__u32)), GFP_KERNEL);
4048
4049 if ((h->reply_pool == NULL) || (h->blockFetchTable == NULL))
4050 goto clean_up;
4051
0498cc2a
SC		 4052 cciss_enter_performant_mode(h,
4053 trans_support & CFGTBL_Trans_use_short_tags);
b9933135 4054
5e216153
MM		 4055 /* Change the access methods to the performant access methods */
4056 h->access = SA5_performant_access;
b9933135 4057 h->transMethod = CFGTBL_Trans_Performant;
5e216153
MM		 4058
4059 return;
4060clean_up:
4061 kfree(h->blockFetchTable);
4062 if (h->reply_pool)
4063 pci_free_consistent(h->pdev,
4064 h->max_commands * sizeof(__u64),
4065 h->reply_pool,
4066 h->reply_pool_dhandle);
4067 return;
4068
4069} /* cciss_put_controller_into_performant_mode */
4070
fb86a35b
MM		 4071/* If MSI/MSI-X is supported by the kernel we will try to enable it on
4072 * controllers that are capable. If not, we use IO-APIC mode.
4073 */
4074
8d85fce7 4075static void cciss_interrupt_mode(ctlr_info_t *h)
fb86a35b
MM		 4076{
4077#ifdef CONFIG_PCI_MSI
7c832835
BH		 4078 int err;
4079 struct msix_entry cciss_msix_entries[4] = { {0, 0}, {0, 1},
4080 {0, 2}, {0, 3}
4081 };
fb86a35b
MM		 4082
4083 /* Some boards advertise MSI but don't really support it */
f70dba83
SC		 4084 if ((h->board_id == 0x40700E11) || (h->board_id == 0x40800E11) ||
4085 (h->board_id == 0x40820E11) || (h->board_id == 0x40830E11))
fb86a35b
MM		 4086 goto default_int_mode;
4087
f70dba83 4088 if (pci_find_capability(h->pdev, PCI_CAP_ID_MSIX)) {
24cddb83 4089 err = pci_enable_msix_exact(h->pdev, cciss_msix_entries, 4);
7c832835 4090 if (!err) {
f70dba83
SC		 4091 h->intr[0] = cciss_msix_entries[0].vector;
4092 h->intr[1] = cciss_msix_entries[1].vector;
4093 h->intr[2] = cciss_msix_entries[2].vector;
4094 h->intr[3] = cciss_msix_entries[3].vector;
4095 h->msix_vector = 1;
7c832835 4096 return;
7c832835 4097 } else {
b2a4a43d
SC		 4098 dev_warn(&h->pdev->dev,
4099 "MSI-X init failed %d\n", err);
7c832835
BH		 4100 }
4101 }
f70dba83
SC		 4102 if (pci_find_capability(h->pdev, PCI_CAP_ID_MSI)) {
4103 if (!pci_enable_msi(h->pdev))
4104 h->msi_vector = 1;
4105 else
b2a4a43d 4106 dev_warn(&h->pdev->dev, "MSI init failed\n");
7c832835 4107 }
1ecb9c0f 4108default_int_mode:
7c832835 4109#endif /* CONFIG_PCI_MSI */
fb86a35b 4110 /* if we get here we're going to use the default interrupt mode */
13049537 4111 h->intr[h->intr_mode] = h->pdev->irq;
fb86a35b
MM		 4112 return;
4113}
4114
8d85fce7 4115static int cciss_lookup_board_id(struct pci_dev *pdev, u32 *board_id)
1da177e4 4116{
6539fa9b
SC		 4117 int i;
4118 u32 subsystem_vendor_id, subsystem_device_id;
2ec24ff1
SC		 4119
4120 subsystem_vendor_id = pdev->subsystem_vendor;
4121 subsystem_device_id = pdev->subsystem_device;
6539fa9b
SC		 4122 *board_id = ((subsystem_device_id << 16) & 0xffff0000) |
4123 subsystem_vendor_id;
2ec24ff1 4124
e4292e05
MM		 4125 for (i = 0; i < ARRAY_SIZE(products); i++) {
4126 /* Stand aside for hpsa driver on request */
4127 if (cciss_allow_hpsa)
4128 return -ENODEV;
6539fa9b
SC		 4129 if (*board_id == products[i].board_id)
4130 return i;
e4292e05 4131 }
6539fa9b
SC		 4132 dev_warn(&pdev->dev, "unrecognized board ID: 0x%08x, ignoring.\n",
4133 *board_id);
4134 return -ENODEV;
4135}
1da177e4 4136
dd9c426e
SC		 4137static inline bool cciss_board_disabled(ctlr_info_t *h)
4138{
4139 u16 command;
1da177e4 4140
dd9c426e
SC		 4141 (void) pci_read_config_word(h->pdev, PCI_COMMAND, &command);
4142 return ((command & PCI_COMMAND_MEMORY) == 0);
4143}
1da177e4 4144
8d85fce7
GKH		 4145static int cciss_pci_find_memory_BAR(struct pci_dev *pdev,
4146 unsigned long *memory_bar)
d474830d
SC		 4147{
4148 int i;
4e570309 4149
d474830d
SC		 4150 for (i = 0; i < DEVICE_COUNT_RESOURCE; i++)
4151 if (pci_resource_flags(pdev, i) & IORESOURCE_MEM) {
4152 /* addressing mode bits already removed */
4153 *memory_bar = pci_resource_start(pdev, i);
4154 dev_dbg(&pdev->dev, "memory BAR = %lx\n",
4155 *memory_bar);
4156 return 0;
4157 }
4158 dev_warn(&pdev->dev, "no memory BAR found\n");
4159 return -ENODEV;
4160}
1da177e4 4161
8d85fce7
GKH		 4162static int cciss_wait_for_board_state(struct pci_dev *pdev,
4163 void __iomem *vaddr, int wait_for_ready)
afa842fa
SC		 4164#define BOARD_READY 1
4165#define BOARD_NOT_READY 0
e99ba136 4166{
afa842fa 4167 int i, iterations;
e99ba136 4168 u32 scratchpad;
1da177e4 4169
afa842fa
SC		 4170 if (wait_for_ready)
4171 iterations = CCISS_BOARD_READY_ITERATIONS;
4172 else
4173 iterations = CCISS_BOARD_NOT_READY_ITERATIONS;
4174
4175 for (i = 0; i < iterations; i++) {
4176 scratchpad = readl(vaddr + SA5_SCRATCHPAD_OFFSET);
4177 if (wait_for_ready) {
4178 if (scratchpad == CCISS_FIRMWARE_READY)
4179 return 0;
4180 } else {
4181 if (scratchpad != CCISS_FIRMWARE_READY)
4182 return 0;
4183 }
e99ba136 4184 msleep(CCISS_BOARD_READY_POLL_INTERVAL_MSECS);
e1438581 4185 }
afa842fa 4186 dev_warn(&pdev->dev, "board not ready, timed out.\n");
e99ba136
SC		 4187 return -ENODEV;
4188}
e1438581 4189
8d85fce7
GKH		 4190static int cciss_find_cfg_addrs(struct pci_dev *pdev, void __iomem *vaddr,
4191 u32 *cfg_base_addr, u64 *cfg_base_addr_index,
4192 u64 *cfg_offset)
8e93bf6d
SC		 4193{
4194 *cfg_base_addr = readl(vaddr + SA5_CTCFG_OFFSET);
4195 *cfg_offset = readl(vaddr + SA5_CTMEM_OFFSET);
4196 *cfg_base_addr &= (u32) 0x0000ffff;
4197 *cfg_base_addr_index = find_PCI_BAR_index(pdev, *cfg_base_addr);
4198 if (*cfg_base_addr_index == -1) {
4199 dev_warn(&pdev->dev, "cannot find cfg_base_addr_index, "
4200 "*cfg_base_addr = 0x%08x\n", *cfg_base_addr);
4201 return -ENODEV;
4202 }
4203 return 0;
4204}
1da177e4 4205
8d85fce7 4206static int cciss_find_cfgtables(ctlr_info_t *h)
4809d098
SC		 4207{
4208 u64 cfg_offset;
4209 u32 cfg_base_addr;
4210 u64 cfg_base_addr_index;
4211 u32 trans_offset;
8e93bf6d 4212 int rc;
1da177e4 4213
8e93bf6d
SC		 4214 rc = cciss_find_cfg_addrs(h->pdev, h->vaddr, &cfg_base_addr,
4215 &cfg_base_addr_index, &cfg_offset);
4216 if (rc)
4217 return rc;
4809d098 4218 h->cfgtable = remap_pci_mem(pci_resource_start(h->pdev,
d2b805d8 4219 cfg_base_addr_index) + cfg_offset, sizeof(*h->cfgtable));
4809d098
SC		 4220 if (!h->cfgtable)
4221 return -ENOMEM;
62710ae1
SC		 4222 rc = write_driver_ver_to_cfgtable(h->cfgtable);
4223 if (rc)
4224 return rc;
4809d098 4225 /* Find performant mode table. */
8e93bf6d 4226 trans_offset = readl(&h->cfgtable->TransMethodOffset);
4809d098
SC		 4227 h->transtable = remap_pci_mem(pci_resource_start(h->pdev,
4228 cfg_base_addr_index)+cfg_offset+trans_offset,
4229 sizeof(*h->transtable));
4230 if (!h->transtable)
4231 return -ENOMEM;
4232 return 0;
4233}
1da177e4 4234
8d85fce7 4235static void cciss_get_max_perf_mode_cmds(struct ctlr_info *h)
adfbc1ff
SC		 4236{
4237 h->max_commands = readl(&(h->cfgtable->MaxPerformantModeCommands));
186fb9cf
SC		 4238
4239 /* Limit commands in memory limited kdump scenario. */
4240 if (reset_devices && h->max_commands > 32)
4241 h->max_commands = 32;
4242
adfbc1ff
SC		 4243 if (h->max_commands < 16) {
4244 dev_warn(&h->pdev->dev, "Controller reports "
4245 "max supported commands of %d, an obvious lie. "
4246 "Using 16. Ensure that firmware is up to date.\n",
4247 h->max_commands);
4248 h->max_commands = 16;
1da177e4 4249 }
adfbc1ff 4250}
1da177e4 4251
afadbf4b
SC		 4252/* Interrogate the hardware for some limits:
4253 * max commands, max SG elements without chaining, and with chaining,
4254 * SG chain block size, etc.
4255 */
8d85fce7 4256static void cciss_find_board_params(ctlr_info_t *h)
afadbf4b 4257{
adfbc1ff 4258 cciss_get_max_perf_mode_cmds(h);
8a4ec67b 4259 h->nr_cmds = h->max_commands - 4 - cciss_tape_cmds;
afadbf4b 4260 h->maxsgentries = readl(&(h->cfgtable->MaxSGElements));
e7b18ede
MM		 4261 /*
4262 * The P600 may exhibit poor performnace under some workloads
4263 * if we use the value in the configuration table. Limit this
4264 * controller to MAXSGENTRIES (32) instead.
4265 */
4266 if (h->board_id == 0x3225103C)
4267 h->maxsgentries = MAXSGENTRIES;
5c07a311 4268 /*
afadbf4b 4269 * Limit in-command s/g elements to 32 save dma'able memory.
5c07a311
DB		 4270 * Howvever spec says if 0, use 31
4271 */
afadbf4b
SC		 4272 h->max_cmd_sgentries = 31;
4273 if (h->maxsgentries > 512) {
4274 h->max_cmd_sgentries = 32;
4275 h->chainsize = h->maxsgentries - h->max_cmd_sgentries + 1;
4276 h->maxsgentries--; /* save one for chain pointer */
5c07a311 4277 } else {
afadbf4b
SC		 4278 h->maxsgentries = 31; /* default to traditional values */
4279 h->chainsize = 0;
5c07a311 4280 }
afadbf4b 4281}
5c07a311 4282
501b92cd
SC		 4283static inline bool CISS_signature_present(ctlr_info_t *h)
4284{
d48c152a 4285 if (!check_signature(h->cfgtable->Signature, "CISS", 4)) {
501b92cd
SC		 4286 dev_warn(&h->pdev->dev, "not a valid CISS config table\n");
4287 return false;
1da177e4 4288 }
501b92cd
SC		 4289 return true;
4290}
4291
322e304c
SC		 4292/* Need to enable prefetch in the SCSI core for 6400 in x86 */
4293static inline void cciss_enable_scsi_prefetch(ctlr_info_t *h)
4294{
1da177e4 4295#ifdef CONFIG_X86
322e304c
SC		 4296 u32 prefetch;
4297
4298 prefetch = readl(&(h->cfgtable->SCSI_Prefetch));
4299 prefetch |= 0x100;
4300 writel(prefetch, &(h->cfgtable->SCSI_Prefetch));
1da177e4 4301#endif
322e304c 4302}
1da177e4 4303
bfd63ee5
SC		 4304/* Disable DMA prefetch for the P600. Otherwise an ASIC bug may result
4305 * in a prefetch beyond physical memory.
4306 */
4307static inline void cciss_p600_dma_prefetch_quirk(ctlr_info_t *h)
4308{
4309 u32 dma_prefetch;
4310 __u32 dma_refetch;
4311
4312 if (h->board_id != 0x3225103C)
4313 return;
4314 dma_prefetch = readl(h->vaddr + I2O_DMA1_CFG);
4315 dma_prefetch |= 0x8000;
4316 writel(dma_prefetch, h->vaddr + I2O_DMA1_CFG);
4317 pci_read_config_dword(h->pdev, PCI_COMMAND_PARITY, &dma_refetch);
4318 dma_refetch |= 0x1;
4319 pci_write_config_dword(h->pdev, PCI_COMMAND_PARITY, dma_refetch);
4320}
4321
8d85fce7 4322static int cciss_pci_init(ctlr_info_t *h)
6539fa9b 4323{
4809d098 4324 int prod_index, err;
6539fa9b 4325
f70dba83 4326 prod_index = cciss_lookup_board_id(h->pdev, &h->board_id);
6539fa9b 4327 if (prod_index < 0)
2ec24ff1 4328 return -ENODEV;
f70dba83
SC		 4329 h->product_name = products[prod_index].product_name;
4330 h->access = *(products[prod_index].access);
1da177e4 4331
f70dba83 4332 if (cciss_board_disabled(h)) {
b2a4a43d 4333 dev_warn(&h->pdev->dev, "controller appears to be disabled\n");
c33ac89b 4334 return -ENODEV;
1da177e4 4335 }
19373358
MG		 4336
4337 pci_disable_link_state(h->pdev, PCIE_LINK_STATE_L0S |
4338 PCIE_LINK_STATE_L1 | PCIE_LINK_STATE_CLKPM);
4339
f70dba83 4340 err = pci_enable_device(h->pdev);
7c832835 4341 if (err) {
b2a4a43d 4342 dev_warn(&h->pdev->dev, "Unable to Enable PCI device\n");
c33ac89b 4343 return err;
f92e2f5f
MM		 4344 }
4345
f70dba83 4346 err = pci_request_regions(h->pdev, "cciss");
4e570309 4347 if (err) {
b2a4a43d
SC		 4348 dev_warn(&h->pdev->dev,
4349 "Cannot obtain PCI resources, aborting\n");
872225ca 4350 return err;
4e570309 4351 }
1da177e4 4352
b2a4a43d
SC		 4353 dev_dbg(&h->pdev->dev, "irq = %x\n", h->pdev->irq);
4354 dev_dbg(&h->pdev->dev, "board_id = %x\n", h->board_id);
1da177e4 4355
fb86a35b
MM		 4356/* If the kernel supports MSI/MSI-X we will try to enable that functionality,
4357 * else we use the IO-APIC interrupt assigned to us by system ROM.
4358 */
f70dba83
SC		 4359 cciss_interrupt_mode(h);
4360 err = cciss_pci_find_memory_BAR(h->pdev, &h->paddr);
d474830d 4361 if (err)
e1438581 4362 goto err_out_free_res;
f70dba83
SC		 4363 h->vaddr = remap_pci_mem(h->paddr, 0x250);
4364 if (!h->vaddr) {
da550321
SC		 4365 err = -ENOMEM;
4366 goto err_out_free_res;
7c832835 4367 }
afa842fa 4368 err = cciss_wait_for_board_state(h->pdev, h->vaddr, BOARD_READY);
e99ba136 4369 if (err)
4e570309 4370 goto err_out_free_res;
f70dba83 4371 err = cciss_find_cfgtables(h);
4809d098 4372 if (err)
4e570309 4373 goto err_out_free_res;
b2a4a43d 4374 print_cfg_table(h);
f70dba83 4375 cciss_find_board_params(h);
1da177e4 4376
f70dba83 4377 if (!CISS_signature_present(h)) {
c33ac89b 4378 err = -ENODEV;
4e570309 4379 goto err_out_free_res;
1da177e4 4380 }
f70dba83
SC		 4381 cciss_enable_scsi_prefetch(h);
4382 cciss_p600_dma_prefetch_quirk(h);
13049537
JH		 4383 err = cciss_enter_simple_mode(h);
4384 if (err)
4385 goto err_out_free_res;
f70dba83 4386 cciss_put_controller_into_performant_mode(h);
1da177e4
LT		 4387 return 0;
4388
5faad620 4389err_out_free_res:
872225ca
MM		 4390 /*
4391 * Deliberately omit pci_disable_device(): it does something nasty to
4392 * Smart Array controllers that pci_enable_device does not undo
4393 */
f70dba83
SC		 4394 if (h->transtable)
4395 iounmap(h->transtable);
4396 if (h->cfgtable)
4397 iounmap(h->cfgtable);
4398 if (h->vaddr)
4399 iounmap(h->vaddr);
4400 pci_release_regions(h->pdev);
c33ac89b 4401 return err;
1da177e4
LT		 4402}
4403
6ae5ce8e
MM		 4404/* Function to find the first free pointer into our hba[] array
4405 * Returns -1 if no free entries are left.
7c832835 4406 */
b2a4a43d 4407static int alloc_cciss_hba(struct pci_dev *pdev)
1da177e4 4408{
799202cb 4409 int i;
1da177e4 4410
7c832835 4411 for (i = 0; i < MAX_CTLR; i++) {
1da177e4 4412 if (!hba[i]) {
f70dba83 4413 ctlr_info_t *h;
f2912a12 4414
f70dba83
SC		 4415 h = kzalloc(sizeof(ctlr_info_t), GFP_KERNEL);
4416 if (!h)
1da177e4 4417 goto Enomem;
f70dba83 4418 hba[i] = h;
1da177e4
LT		 4419 return i;
4420 }
4421 }
b2a4a43d 4422 dev_warn(&pdev->dev, "This driver supports a maximum"
7c832835 4423 " of %d controllers.\n", MAX_CTLR);
799202cb
MM		 4424 return -1;
4425Enomem:
b2a4a43d 4426 dev_warn(&pdev->dev, "out of memory.\n");
1da177e4
LT		 4427 return -1;
4428}
4429
f70dba83 4430static void free_hba(ctlr_info_t *h)
1da177e4 4431{
2c935593 4432 int i;
1da177e4 4433
f70dba83 4434 hba[h->ctlr] = NULL;
2c935593
SC		 4435 for (i = 0; i < h->highest_lun + 1; i++)
4436 if (h->gendisk[i] != NULL)
4437 put_disk(h->gendisk[i]);
4438 kfree(h);
1da177e4
LT		 4439}
4440
82eb03cf 4441/* Send a message CDB to the firmware. */
8d85fce7
GKH		 4442static int cciss_message(struct pci_dev *pdev, unsigned char opcode,
4443 unsigned char type)
82eb03cf
CC		 4444{
4445 typedef struct {
4446 CommandListHeader_struct CommandHeader;
4447 RequestBlock_struct Request;
4448 ErrDescriptor_struct ErrorDescriptor;
4449 } Command;
4450 static const size_t cmd_sz = sizeof(Command) + sizeof(ErrorInfo_struct);
4451 Command *cmd;
4452 dma_addr_t paddr64;
4453 uint32_t paddr32, tag;
4454 void __iomem *vaddr;
4455 int i, err;
4456
4457 vaddr = ioremap_nocache(pci_resource_start(pdev, 0), pci_resource_len(pdev, 0));
4458 if (vaddr == NULL)
4459 return -ENOMEM;
4460
4461 /* The Inbound Post Queue only accepts 32-bit physical addresses for the
4462 CCISS commands, so they must be allocated from the lower 4GiB of
4463 memory. */
e930438c 4464 err = pci_set_consistent_dma_mask(pdev, DMA_BIT_MASK(32));
82eb03cf
CC		 4465 if (err) {
4466 iounmap(vaddr);
4467 return -ENOMEM;
4468 }
4469
4470 cmd = pci_alloc_consistent(pdev, cmd_sz, &paddr64);
4471 if (cmd == NULL) {
4472 iounmap(vaddr);
4473 return -ENOMEM;
4474 }
4475
4476 /* This must fit, because of the 32-bit consistent DMA mask. Also,
4477 although there's no guarantee, we assume that the address is at
4478 least 4-byte aligned (most likely, it's page-aligned). */
4479 paddr32 = paddr64;
4480
4481 cmd->CommandHeader.ReplyQueue = 0;
4482 cmd->CommandHeader.SGList = 0;
4483 cmd->CommandHeader.SGTotal = 0;
4484 cmd->CommandHeader.Tag.lower = paddr32;
4485 cmd->CommandHeader.Tag.upper = 0;
4486 memset(&cmd->CommandHeader.LUN.LunAddrBytes, 0, 8);
4487
4488 cmd->Request.CDBLen = 16;
4489 cmd->Request.Type.Type = TYPE_MSG;
4490 cmd->Request.Type.Attribute = ATTR_HEADOFQUEUE;
4491 cmd->Request.Type.Direction = XFER_NONE;
4492 cmd->Request.Timeout = 0; /* Don't time out */
4493 cmd->Request.CDB[0] = opcode;
4494 cmd->Request.CDB[1] = type;
4495 memset(&cmd->Request.CDB[2], 0, 14); /* the rest of the CDB is reserved */
4496
4497 cmd->ErrorDescriptor.Addr.lower = paddr32 + sizeof(Command);
4498 cmd->ErrorDescriptor.Addr.upper = 0;
4499 cmd->ErrorDescriptor.Len = sizeof(ErrorInfo_struct);
4500
4501 writel(paddr32, vaddr + SA5_REQUEST_PORT_OFFSET);
4502
4503 for (i = 0; i < 10; i++) {
4504 tag = readl(vaddr + SA5_REPLY_PORT_OFFSET);
4505 if ((tag & ~3) == paddr32)
4506 break;
3e28601f 4507 msleep(CCISS_POST_RESET_NOOP_TIMEOUT_MSECS);
82eb03cf
CC		 4508 }
4509
4510 iounmap(vaddr);
4511
4512 /* we leak the DMA buffer here ... no choice since the controller could
4513 still complete the command. */
4514 if (i == 10) {
b2a4a43d
SC		 4515 dev_err(&pdev->dev,
4516 "controller message %02x:%02x timed out\n",
82eb03cf
CC		 4517 opcode, type);
4518 return -ETIMEDOUT;
4519 }
4520
4521 pci_free_consistent(pdev, cmd_sz, cmd, paddr64);
4522
4523 if (tag & 2) {
b2a4a43d 4524 dev_err(&pdev->dev, "controller message %02x:%02x failed\n",
82eb03cf
CC		 4525 opcode, type);
4526 return -EIO;
4527 }
4528
b2a4a43d 4529 dev_info(&pdev->dev, "controller message %02x:%02x succeeded\n",
82eb03cf
CC		 4530 opcode, type);
4531 return 0;
4532}
4533
82eb03cf
CC		 4534#define cciss_noop(p) cciss_message(p, 3, 0)
4535
a6528d01 4536static int cciss_controller_hard_reset(struct pci_dev *pdev,
bf2e2e6b 4537 void * __iomem vaddr, u32 use_doorbell)
82eb03cf 4538{
a6528d01
SC		 4539 u16 pmcsr;
4540 int pos;
82eb03cf 4541
a6528d01
SC		 4542 if (use_doorbell) {
4543 /* For everything after the P600, the PCI power state method
4544 * of resetting the controller doesn't work, so we have this
4545 * other way using the doorbell register.
4546 */
4547 dev_info(&pdev->dev, "using doorbell to reset controller\n");
bf2e2e6b 4548 writel(use_doorbell, vaddr + SA5_DOORBELL);
a6528d01
SC		 4549 } else { /* Try to do it the PCI power state way */
4550
4551 /* Quoting from the Open CISS Specification: "The Power
4552 * Management Control/Status Register (CSR) controls the power
4553 * state of the device. The normal operating state is D0,
4554 * CSR=00h. The software off state is D3, CSR=03h. To reset
4555 * the controller, place the interface device in D3 then to D0,
4556 * this causes a secondary PCI reset which will reset the
4557 * controller." */
4558
4559 pos = pci_find_capability(pdev, PCI_CAP_ID_PM);
4560 if (pos == 0) {
4561 dev_err(&pdev->dev,
4562 "cciss_controller_hard_reset: "
4563 "PCI PM not supported\n");
4564 return -ENODEV;
4565 }
4566 dev_info(&pdev->dev, "using PCI PM to reset controller\n");
4567 /* enter the D3hot power management state */
4568 pci_read_config_word(pdev, pos + PCI_PM_CTRL, &pmcsr);
4569 pmcsr &= ~PCI_PM_CTRL_STATE_MASK;
4570 pmcsr |= PCI_D3hot;
4571 pci_write_config_word(pdev, pos + PCI_PM_CTRL, pmcsr);
82eb03cf 4572
a6528d01 4573 msleep(500);
82eb03cf 4574
a6528d01
SC		 4575 /* enter the D0 power management state */
4576 pmcsr &= ~PCI_PM_CTRL_STATE_MASK;
4577 pmcsr |= PCI_D0;
4578 pci_write_config_word(pdev, pos + PCI_PM_CTRL, pmcsr);
ab5dbebe
MM		 4579
4580 /*
4581 * The P600 requires a small delay when changing states.
4582 * Otherwise we may think the board did not reset and we bail.
4583 * This for kdump only and is particular to the P600.
4584 */
4585 msleep(500);
a6528d01
SC		 4586 }
4587 return 0;
4588}
82eb03cf 4589
8d85fce7 4590static void init_driver_version(char *driver_version, int len)
62710ae1
SC		 4591{
4592 memset(driver_version, 0, len);
4593 strncpy(driver_version, "cciss " DRIVER_NAME, len - 1);
4594}
4595
8d85fce7 4596static int write_driver_ver_to_cfgtable(CfgTable_struct __iomem *cfgtable)
62710ae1
SC		 4597{
4598 char *driver_version;
4599 int i, size = sizeof(cfgtable->driver_version);
4600
4601 driver_version = kmalloc(size, GFP_KERNEL);
4602 if (!driver_version)
4603 return -ENOMEM;
4604
4605 init_driver_version(driver_version, size);
4606 for (i = 0; i < size; i++)
4607 writeb(driver_version[i], &cfgtable->driver_version[i]);
4608 kfree(driver_version);
4609 return 0;
4610}
4611
8d85fce7
GKH		 4612static void read_driver_ver_from_cfgtable(CfgTable_struct __iomem *cfgtable,
4613 unsigned char *driver_ver)
62710ae1
SC		 4614{
4615 int i;
4616
4617 for (i = 0; i < sizeof(cfgtable->driver_version); i++)
4618 driver_ver[i] = readb(&cfgtable->driver_version[i]);
4619}
4620
8d85fce7 4621static int controller_reset_failed(CfgTable_struct __iomem *cfgtable)
62710ae1
SC		 4622{
4623
4624 char *driver_ver, *old_driver_ver;
4625 int rc, size = sizeof(cfgtable->driver_version);
4626
4627 old_driver_ver = kmalloc(2 * size, GFP_KERNEL);
4628 if (!old_driver_ver)
4629 return -ENOMEM;
4630 driver_ver = old_driver_ver + size;
4631
4632 /* After a reset, the 32 bytes of "driver version" in the cfgtable
4633 * should have been changed, otherwise we know the reset failed.
4634 */
4635 init_driver_version(old_driver_ver, size);
4636 read_driver_ver_from_cfgtable(cfgtable, driver_ver);
4637 rc = !memcmp(driver_ver, old_driver_ver, size);
4638 kfree(old_driver_ver);
4639 return rc;
4640}
4641
a6528d01
SC		 4642/* This does a hard reset of the controller using PCI power management
4643 * states or using the doorbell register. */
8d85fce7 4644static int cciss_kdump_hard_reset_controller(struct pci_dev *pdev)
a6528d01 4645{
a6528d01
SC		 4646 u64 cfg_offset;
4647 u32 cfg_base_addr;
4648 u64 cfg_base_addr_index;
4649 void __iomem *vaddr;
4650 unsigned long paddr;
62710ae1 4651 u32 misc_fw_support;
f442e64b 4652 int rc;
a6528d01 4653 CfgTable_struct __iomem *cfgtable;
bf2e2e6b 4654 u32 use_doorbell;
058a0f9f 4655 u32 board_id;
f442e64b 4656 u16 command_register;
a6528d01
SC		 4657
4658 /* For controllers as old a the p600, this is very nearly
4659 * the same thing as
4660 *
4661 * pci_save_state(pci_dev);
4662 * pci_set_power_state(pci_dev, PCI_D3hot);
4663 * pci_set_power_state(pci_dev, PCI_D0);
4664 * pci_restore_state(pci_dev);
4665 *
a6528d01
SC		 4666 * For controllers newer than the P600, the pci power state
4667 * method of resetting doesn't work so we have another way
4668 * using the doorbell register.
4669 */
82eb03cf 4670
058a0f9f
SC		 4671 /* Exclude 640x boards. These are two pci devices in one slot
4672 * which share a battery backed cache module. One controls the
4673 * cache, the other accesses the cache through the one that controls
4674 * it. If we reset the one controlling the cache, the other will
4675 * likely not be happy. Just forbid resetting this conjoined mess.
4676 */
4677 cciss_lookup_board_id(pdev, &board_id);
ec52d5f1 4678 if (!ctlr_is_resettable(board_id)) {
b9ea9dcd 4679 dev_warn(&pdev->dev, "Controller not resettable\n");
82eb03cf
CC		 4680 return -ENODEV;
4681 }
4682
ec52d5f1
SC		 4683 /* if controller is soft- but not hard resettable... */
4684 if (!ctlr_is_hard_resettable(board_id))
4685 return -ENOTSUPP; /* try soft reset later. */
4686
f442e64b
SC		 4687 /* Save the PCI command register */
4688 pci_read_config_word(pdev, 4, &command_register);
4689 /* Turn the board off. This is so that later pci_restore_state()
4690 * won't turn the board on before the rest of config space is ready.
4691 */
4692 pci_disable_device(pdev);
4693 pci_save_state(pdev);
82eb03cf 4694
a6528d01
SC		 4695 /* find the first memory BAR, so we can find the cfg table */
4696 rc = cciss_pci_find_memory_BAR(pdev, &paddr);
4697 if (rc)
4698 return rc;
4699 vaddr = remap_pci_mem(paddr, 0x250);
4700 if (!vaddr)
4701 return -ENOMEM;
82eb03cf 4702
a6528d01
SC		 4703 /* find cfgtable in order to check if reset via doorbell is supported */
4704 rc = cciss_find_cfg_addrs(pdev, vaddr, &cfg_base_addr,
4705 &cfg_base_addr_index, &cfg_offset);
4706 if (rc)
4707 goto unmap_vaddr;
4708 cfgtable = remap_pci_mem(pci_resource_start(pdev,
4709 cfg_base_addr_index) + cfg_offset, sizeof(*cfgtable));
4710 if (!cfgtable) {
4711 rc = -ENOMEM;
4712 goto unmap_vaddr;
4713 }
62710ae1
SC		 4714 rc = write_driver_ver_to_cfgtable(cfgtable);
4715 if (rc)
4716 goto unmap_vaddr;
82eb03cf 4717
bf2e2e6b
SC		 4718 /* If reset via doorbell register is supported, use that.
4719 * There are two such methods. Favor the newest method.
75230ff2 4720 */
bf2e2e6b
SC		 4721 misc_fw_support = readl(&cfgtable->misc_fw_support);
4722 use_doorbell = misc_fw_support & MISC_FW_DOORBELL_RESET2;
4723 if (use_doorbell) {
4724 use_doorbell = DOORBELL_CTLR_RESET2;
4725 } else {
4726 use_doorbell = misc_fw_support & MISC_FW_DOORBELL_RESET;
063d2cf7
SC		 4727 if (use_doorbell) {
4728 dev_warn(&pdev->dev, "Controller claims that "
4729 "'Bit 2 doorbell reset' is "
4730 "supported, but not 'bit 5 doorbell reset'. "
4731 "Firmware update is recommended.\n");
4732 rc = -ENOTSUPP; /* use the soft reset */
4733 goto unmap_cfgtable;
4734 }
bf2e2e6b 4735 }
75230ff2 4736
a6528d01
SC		 4737 rc = cciss_controller_hard_reset(pdev, vaddr, use_doorbell);
4738 if (rc)
4739 goto unmap_cfgtable;
f442e64b
SC		 4740 pci_restore_state(pdev);
4741 rc = pci_enable_device(pdev);
4742 if (rc) {
4743 dev_warn(&pdev->dev, "failed to enable device.\n");
4744 goto unmap_cfgtable;
82eb03cf 4745 }
f442e64b 4746 pci_write_config_word(pdev, 4, command_register);
82eb03cf 4747
a6528d01
SC		 4748 /* Some devices (notably the HP Smart Array 5i Controller)
4749 need a little pause here */
4750 msleep(CCISS_POST_RESET_PAUSE_MSECS);
4751
afa842fa 4752 /* Wait for board to become not ready, then ready. */
59ec86bb 4753 dev_info(&pdev->dev, "Waiting for board to reset.\n");
afa842fa 4754 rc = cciss_wait_for_board_state(pdev, vaddr, BOARD_NOT_READY);
5afe2781
SC		 4755 if (rc) {
4756 dev_warn(&pdev->dev, "Failed waiting for board to hard reset."
4757 " Will try soft reset.\n");
4758 rc = -ENOTSUPP; /* Not expected, but try soft reset later */
4759 goto unmap_cfgtable;
4760 }
afa842fa
SC		 4761 rc = cciss_wait_for_board_state(pdev, vaddr, BOARD_READY);
4762 if (rc) {
4763 dev_warn(&pdev->dev,
5afe2781
SC		 4764 "failed waiting for board to become ready "
4765 "after hard reset\n");
afa842fa
SC		 4766 goto unmap_cfgtable;
4767 }
afa842fa 4768
62710ae1
SC		 4769 rc = controller_reset_failed(vaddr);
4770 if (rc < 0)
4771 goto unmap_cfgtable;
4772 if (rc) {
5afe2781
SC		 4773 dev_warn(&pdev->dev, "Unable to successfully hard reset "
4774 "controller. Will try soft reset.\n");
4775 rc = -ENOTSUPP; /* Not expected, but try soft reset later */
62710ae1 4776 } else {
5afe2781 4777 dev_info(&pdev->dev, "Board ready after hard reset.\n");
a6528d01
SC		 4778 }
4779
4780unmap_cfgtable:
4781 iounmap(cfgtable);
4782
4783unmap_vaddr:
4784 iounmap(vaddr);
4785 return rc;
82eb03cf
CC		 4786}
4787
8d85fce7 4788static int cciss_init_reset_devices(struct pci_dev *pdev)
83123cb1 4789{
a6528d01 4790 int rc, i;
83123cb1
SC		 4791
4792 if (!reset_devices)
4793 return 0;
4794
a6528d01
SC		 4795 /* Reset the controller with a PCI power-cycle or via doorbell */
4796 rc = cciss_kdump_hard_reset_controller(pdev);
83123cb1 4797
a6528d01
SC		 4798 /* -ENOTSUPP here means we cannot reset the controller
4799 * but it's already (and still) up and running in
058a0f9f
SC		 4800 * "performant mode". Or, it might be 640x, which can't reset
4801 * due to concerns about shared bbwc between 6402/6404 pair.
a6528d01
SC		 4802 */
4803 if (rc == -ENOTSUPP)
5afe2781 4804 return rc; /* just try to do the kdump anyhow. */
a6528d01
SC		 4805 if (rc)
4806 return -ENODEV;
83123cb1
SC		 4807
4808 /* Now try to get the controller to respond to a no-op */
59ec86bb 4809 dev_warn(&pdev->dev, "Waiting for controller to respond to no-op\n");
83123cb1
SC		 4810 for (i = 0; i < CCISS_POST_RESET_NOOP_RETRIES; i++) {
4811 if (cciss_noop(pdev) == 0)
4812 break;
4813 else
4814 dev_warn(&pdev->dev, "no-op failed%s\n",
4815 (i < CCISS_POST_RESET_NOOP_RETRIES - 1 ?
4816 "; re-trying" : ""));
4817 msleep(CCISS_POST_RESET_NOOP_INTERVAL_MSECS);
4818 }
82eb03cf
CC		 4819 return 0;
4820}
4821
8d85fce7 4822static int cciss_allocate_cmd_pool(ctlr_info_t *h)
54dae343 4823{
1f118bc4 4824 h->cmd_pool_bits = kmalloc(BITS_TO_LONGS(h->nr_cmds) *
54dae343
SC		 4825 sizeof(unsigned long), GFP_KERNEL);
4826 h->cmd_pool = pci_alloc_consistent(h->pdev,
4827 h->nr_cmds * sizeof(CommandList_struct),
4828 &(h->cmd_pool_dhandle));
4829 h->errinfo_pool = pci_alloc_consistent(h->pdev,
4830 h->nr_cmds * sizeof(ErrorInfo_struct),
4831 &(h->errinfo_pool_dhandle));
4832 if ((h->cmd_pool_bits == NULL)
4833 || (h->cmd_pool == NULL)
4834 || (h->errinfo_pool == NULL)) {
4835 dev_err(&h->pdev->dev, "out of memory");
4836 return -ENOMEM;
4837 }
4838 return 0;
4839}
4840
8d85fce7 4841static int cciss_allocate_scatterlists(ctlr_info_t *h)
abf7966e
SC		 4842{
4843 int i;
4844
4845 /* zero it, so that on free we need not know how many were alloc'ed */
4846 h->scatter_list = kzalloc(h->max_commands *
4847 sizeof(struct scatterlist *), GFP_KERNEL);
4848 if (!h->scatter_list)
4849 return -ENOMEM;
4850
4851 for (i = 0; i < h->nr_cmds; i++) {
4852 h->scatter_list[i] = kmalloc(sizeof(struct scatterlist) *
4853 h->maxsgentries, GFP_KERNEL);
4854 if (h->scatter_list[i] == NULL) {
4855 dev_err(&h->pdev->dev, "could not allocate "
4856 "s/g lists\n");
4857 return -ENOMEM;
4858 }
4859 }
4860 return 0;
4861}
4862
4863static void cciss_free_scatterlists(ctlr_info_t *h)
4864{
4865 int i;
4866
4867 if (h->scatter_list) {
4868 for (i = 0; i < h->nr_cmds; i++)
4869 kfree(h->scatter_list[i]);
4870 kfree(h->scatter_list);
4871 }
4872}
4873
54dae343
SC		 4874static void cciss_free_cmd_pool(ctlr_info_t *h)
4875{
4876 kfree(h->cmd_pool_bits);
4877 if (h->cmd_pool)
4878 pci_free_consistent(h->pdev,
4879 h->nr_cmds * sizeof(CommandList_struct),
4880 h->cmd_pool, h->cmd_pool_dhandle);
4881 if (h->errinfo_pool)
4882 pci_free_consistent(h->pdev,
4883 h->nr_cmds * sizeof(ErrorInfo_struct),
4884 h->errinfo_pool, h->errinfo_pool_dhandle);
4885}
4886
2b48085f
SC		 4887static int cciss_request_irq(ctlr_info_t *h,
4888 irqreturn_t (*msixhandler)(int, void *),
4889 irqreturn_t (*intxhandler)(int, void *))
4890{
4891 if (h->msix_vector || h->msi_vector) {
13049537 4892 if (!request_irq(h->intr[h->intr_mode], msixhandler,
6225da48 4893 0, h->devname, h))
2b48085f
SC		 4894 return 0;
4895 dev_err(&h->pdev->dev, "Unable to get msi irq %d"
13049537 4896 " for %s\n", h->intr[h->intr_mode],
2b48085f
SC		 4897 h->devname);
4898 return -1;
4899 }
4900
13049537 4901 if (!request_irq(h->intr[h->intr_mode], intxhandler,
6225da48 4902 IRQF_SHARED, h->devname, h))
2b48085f
SC		 4903 return 0;
4904 dev_err(&h->pdev->dev, "Unable to get irq %d for %s\n",
13049537 4905 h->intr[h->intr_mode], h->devname);
2b48085f
SC		 4906 return -1;
4907}
4908
8d85fce7 4909static int cciss_kdump_soft_reset(ctlr_info_t *h)
5afe2781
SC		 4910{
4911 if (cciss_send_reset(h, CTLR_LUNID, CCISS_RESET_TYPE_CONTROLLER)) {
4912 dev_warn(&h->pdev->dev, "Resetting array controller failed.\n");
4913 return -EIO;
4914 }
4915
4916 dev_info(&h->pdev->dev, "Waiting for board to soft reset.\n");
4917 if (cciss_wait_for_board_state(h->pdev, h->vaddr, BOARD_NOT_READY)) {
4918 dev_warn(&h->pdev->dev, "Soft reset had no effect.\n");
4919 return -1;
4920 }
4921
4922 dev_info(&h->pdev->dev, "Board reset, awaiting READY status.\n");
4923 if (cciss_wait_for_board_state(h->pdev, h->vaddr, BOARD_READY)) {
4924 dev_warn(&h->pdev->dev, "Board failed to become ready "
4925 "after soft reset.\n");
4926 return -1;
4927 }
4928
4929 return 0;
4930}
4931
4932static void cciss_undo_allocations_after_kdump_soft_reset(ctlr_info_t *h)
4933{
4934 int ctlr = h->ctlr;
4935
13049537 4936 free_irq(h->intr[h->intr_mode], h);
5afe2781
SC		 4937#ifdef CONFIG_PCI_MSI
4938 if (h->msix_vector)
4939 pci_disable_msix(h->pdev);
4940 else if (h->msi_vector)
4941 pci_disable_msi(h->pdev);
4942#endif /* CONFIG_PCI_MSI */
4943 cciss_free_sg_chain_blocks(h->cmd_sg_list, h->nr_cmds);
4944 cciss_free_scatterlists(h);
4945 cciss_free_cmd_pool(h);
4946 kfree(h->blockFetchTable);
4947 if (h->reply_pool)
4948 pci_free_consistent(h->pdev, h->max_commands * sizeof(__u64),
4949 h->reply_pool, h->reply_pool_dhandle);
4950 if (h->transtable)
4951 iounmap(h->transtable);
4952 if (h->cfgtable)
4953 iounmap(h->cfgtable);
4954 if (h->vaddr)
4955 iounmap(h->vaddr);
4956 unregister_blkdev(h->major, h->devname);
4957 cciss_destroy_hba_sysfs_entry(h);
4958 pci_release_regions(h->pdev);
4959 kfree(h);
4960 hba[ctlr] = NULL;
4961}
4962
1da177e4
LT		 4963/*
4964 * This is it. Find all the controllers and register them. I really hate
4965 * stealing all these major device numbers.
4966 * returns the number of block devices registered.
4967 */
8d85fce7 4968static int cciss_init_one(struct pci_dev *pdev, const struct pci_device_id *ent)
1da177e4 4969{
1da177e4 4970 int i;
799202cb 4971 int j = 0;
1da177e4 4972 int rc;
5afe2781 4973 int try_soft_reset = 0;
22bece00 4974 int dac, return_code;
212a5026 4975 InquiryData_struct *inq_buff;
f70dba83 4976 ctlr_info_t *h;
5afe2781 4977 unsigned long flags;
1da177e4 4978
0821e904
MM		 4979 /*
4980 * By default the cciss driver is used for all older HP Smart Array
4981 * controllers. There are module paramaters that allow a user to
4982 * override this behavior and instead use the hpsa SCSI driver. If
4983 * this is the case cciss may be loaded first from the kdump initrd
4984 * image and cause a kernel panic. So if reset_devices is true and
4985 * cciss_allow_hpsa is set just bail.
4986 */
4987 if ((reset_devices) && (cciss_allow_hpsa == 1))
4988 return -ENODEV;
83123cb1 4989 rc = cciss_init_reset_devices(pdev);
5afe2781
SC		 4990 if (rc) {
4991 if (rc != -ENOTSUPP)
4992 return rc;
4993 /* If the reset fails in a particular way (it has no way to do
4994 * a proper hard reset, so returns -ENOTSUPP) we can try to do
4995 * a soft reset once we get the controller configured up to the
4996 * point that it can accept a command.
4997 */
4998 try_soft_reset = 1;
4999 rc = 0;
5000 }
5001
5002reinit_after_soft_reset:
5003
b2a4a43d 5004 i = alloc_cciss_hba(pdev);
7c832835 5005 if (i < 0)
4336548a 5006 return -ENOMEM;
1f8ef380 5007
f70dba83
SC		 5008 h = hba[i];
5009 h->pdev = pdev;
5010 h->busy_initializing = 1;
13049537 5011 h->intr_mode = cciss_simple_mode ? SIMPLE_MODE_INT : PERF_MODE_INT;
e6e1ee93
JA		 5012 INIT_LIST_HEAD(&h->cmpQ);
5013 INIT_LIST_HEAD(&h->reqQ);
f70dba83 5014 mutex_init(&h->busy_shutting_down);
1f8ef380 5015
f70dba83 5016 if (cciss_pci_init(h) != 0)
2cfa948c 5017 goto clean_no_release_regions;
1da177e4 5018
f70dba83
SC		 5019 sprintf(h->devname, "cciss%d", i);
5020 h->ctlr = i;
1da177e4 5021
8a4ec67b
SC		 5022 if (cciss_tape_cmds < 2)
5023 cciss_tape_cmds = 2;
5024 if (cciss_tape_cmds > 16)
5025 cciss_tape_cmds = 16;
5026
f70dba83 5027 init_completion(&h->scan_wait);
b368c9dd 5028
f70dba83 5029 if (cciss_create_hba_sysfs_entry(h))
7fe06326
AP		 5030 goto clean0;
5031
1da177e4 5032 /* configure PCI DMA stuff */
6a35528a 5033 if (!pci_set_dma_mask(pdev, DMA_BIT_MASK(64)))
40aabb58 5034 dac = 1;
284901a9 5035 else if (!pci_set_dma_mask(pdev, DMA_BIT_MASK(32)))
40aabb58 5036 dac = 0;
1da177e4 5037 else {
b2a4a43d 5038 dev_err(&h->pdev->dev, "no suitable DMA available\n");
1da177e4
LT		 5039 goto clean1;
5040 }
5041
5042 /*
5043 * register with the major number, or get a dynamic major number
5044 * by passing 0 as argument. This is done for greater than
5045 * 8 controller support.
5046 */
5047 if (i < MAX_CTLR_ORIG)
f70dba83
SC		 5048 h->major = COMPAQ_CISS_MAJOR + i;
5049 rc = register_blkdev(h->major, h->devname);
7c832835 5050 if (rc == -EBUSY || rc == -EINVAL) {
b2a4a43d
SC		 5051 dev_err(&h->pdev->dev,
5052 "Unable to get major number %d for %s "
f70dba83 5053 "on hba %d\n", h->major, h->devname, i);
1da177e4 5054 goto clean1;
7c832835 5055 } else {
1da177e4 5056 if (i >= MAX_CTLR_ORIG)
f70dba83 5057 h->major = rc;
1da177e4
LT		 5058 }
5059
5060 /* make sure the board interrupts are off */
f70dba83 5061 h->access.set_intr_mask(h, CCISS_INTR_OFF);
2b48085f
SC		 5062 rc = cciss_request_irq(h, do_cciss_msix_intr, do_cciss_intx);
5063 if (rc)
5064 goto clean2;
40aabb58 5065
b2a4a43d 5066 dev_info(&h->pdev->dev, "%s: <0x%x> at PCI %s IRQ %d%s using DAC\n",
f70dba83 5067 h->devname, pdev->device, pci_name(pdev),
13049537 5068 h->intr[h->intr_mode], dac ? "" : " not");
7c832835 5069
54dae343 5070 if (cciss_allocate_cmd_pool(h))
1da177e4 5071 goto clean4;
5c07a311 5072
abf7966e 5073 if (cciss_allocate_scatterlists(h))
4ee69851
DC		 5074 goto clean4;
5075
f70dba83
SC		 5076 h->cmd_sg_list = cciss_allocate_sg_chain_blocks(h,
5077 h->chainsize, h->nr_cmds);
5078 if (!h->cmd_sg_list && h->chainsize > 0)
5c07a311 5079 goto clean4;
5c07a311 5080
f70dba83 5081 spin_lock_init(&h->lock);
1da177e4 5082
7c832835 5083 /* Initialize the pdev driver private data.
f70dba83
SC		 5084 have it point to h. */
5085 pci_set_drvdata(pdev, h);
7c832835
BH		 5086 /* command and error info recs zeroed out before
5087 they are used */
1f118bc4 5088 bitmap_zero(h->cmd_pool_bits, h->nr_cmds);
1da177e4 5089
f70dba83
SC		 5090 h->num_luns = 0;
5091 h->highest_lun = -1;
6ae5ce8e 5092 for (j = 0; j < CISS_MAX_LUN; j++) {
f70dba83
SC		 5093 h->drv[j] = NULL;
5094 h->gendisk[j] = NULL;
6ae5ce8e 5095 }
1da177e4 5096
5afe2781
SC		 5097 /* At this point, the controller is ready to take commands.
5098 * Now, if reset_devices and the hard reset didn't work, try
5099 * the soft reset and see if that works.
5100 */
5101 if (try_soft_reset) {
5102
5103 /* This is kind of gross. We may or may not get a completion
5104 * from the soft reset command, and if we do, then the value
5105 * from the fifo may or may not be valid. So, we wait 10 secs
5106 * after the reset throwing away any completions we get during
5107 * that time. Unregister the interrupt handler and register
5108 * fake ones to scoop up any residual completions.
5109 */
5110 spin_lock_irqsave(&h->lock, flags);
5111 h->access.set_intr_mask(h, CCISS_INTR_OFF);
5112 spin_unlock_irqrestore(&h->lock, flags);
13049537 5113 free_irq(h->intr[h->intr_mode], h);
5afe2781
SC		 5114 rc = cciss_request_irq(h, cciss_msix_discard_completions,
5115 cciss_intx_discard_completions);
5116 if (rc) {
5117 dev_warn(&h->pdev->dev, "Failed to request_irq after "
5118 "soft reset.\n");
5119 goto clean4;
5120 }
5121
5122 rc = cciss_kdump_soft_reset(h);
5123 if (rc) {
5124 dev_warn(&h->pdev->dev, "Soft reset failed.\n");
5125 goto clean4;
5126 }
5127
5128 dev_info(&h->pdev->dev, "Board READY.\n");
5129 dev_info(&h->pdev->dev,
5130 "Waiting for stale completions to drain.\n");
5131 h->access.set_intr_mask(h, CCISS_INTR_ON);
5132 msleep(10000);
5133 h->access.set_intr_mask(h, CCISS_INTR_OFF);
5134
5135 rc = controller_reset_failed(h->cfgtable);
5136 if (rc)
5137 dev_info(&h->pdev->dev,
5138 "Soft reset appears to have failed.\n");
5139
5140 /* since the controller's reset, we have to go back and re-init
5141 * everything. Easiest to just forget what we've done and do it
5142 * all over again.
5143 */
5144 cciss_undo_allocations_after_kdump_soft_reset(h);
5145 try_soft_reset = 0;
5146 if (rc)
5147 /* don't go to clean4, we already unallocated */
5148 return -ENODEV;
5149
5150 goto reinit_after_soft_reset;
5151 }
5152
f70dba83 5153 cciss_scsi_setup(h);
1da177e4
LT		 5154
5155 /* Turn the interrupts on so we can service requests */
f70dba83 5156 h->access.set_intr_mask(h, CCISS_INTR_ON);
1da177e4 5157
22bece00
MM		 5158 /* Get the firmware version */
5159 inq_buff = kzalloc(sizeof(InquiryData_struct), GFP_KERNEL);
5160 if (inq_buff == NULL) {
b2a4a43d 5161 dev_err(&h->pdev->dev, "out of memory\n");
22bece00
MM		 5162 goto clean4;
5163 }
5164
f70dba83 5165 return_code = sendcmd_withirq(h, CISS_INQUIRY, inq_buff,
b57695fe 5166 sizeof(InquiryData_struct), 0, CTLR_LUNID, TYPE_CMD);
22bece00 5167 if (return_code == IO_OK) {
f70dba83
SC		 5168 h->firm_ver[0] = inq_buff->data_byte[32];
5169 h->firm_ver[1] = inq_buff->data_byte[33];
5170 h->firm_ver[2] = inq_buff->data_byte[34];
5171 h->firm_ver[3] = inq_buff->data_byte[35];
22bece00 5172 } else { /* send command failed */
b2a4a43d 5173 dev_warn(&h->pdev->dev, "unable to determine firmware"
22bece00
MM		 5174 " version of controller\n");
5175 }
212a5026 5176 kfree(inq_buff);
22bece00 5177
f70dba83 5178 cciss_procinit(h);
92c4231a 5179
f70dba83 5180 h->cciss_max_sectors = 8192;
92c4231a 5181
f70dba83 5182 rebuild_lun_table(h, 1, 0);
0007a4c9 5183 cciss_engage_scsi(h);
f70dba83 5184 h->busy_initializing = 0;
b88fac63 5185 return 0;
1da177e4 5186
6ae5ce8e 5187clean4:
54dae343 5188 cciss_free_cmd_pool(h);
abf7966e 5189 cciss_free_scatterlists(h);
f70dba83 5190 cciss_free_sg_chain_blocks(h->cmd_sg_list, h->nr_cmds);
13049537 5191 free_irq(h->intr[h->intr_mode], h);
6ae5ce8e 5192clean2:
f70dba83 5193 unregister_blkdev(h->major, h->devname);
6ae5ce8e 5194clean1:
f70dba83 5195 cciss_destroy_hba_sysfs_entry(h);
7fe06326 5196clean0:
2cfa948c
SC		 5197 pci_release_regions(pdev);
5198clean_no_release_regions:
f70dba83 5199 h->busy_initializing = 0;
9cef0d2f 5200
872225ca
MM		 5201 /*
5202 * Deliberately omit pci_disable_device(): it does something nasty to
5203 * Smart Array controllers that pci_enable_device does not undo
5204 */
799202cb 5205 pci_set_drvdata(pdev, NULL);
f70dba83 5206 free_hba(h);
4336548a 5207 return -ENODEV;
1da177e4
LT		 5208}
5209
e9ca75b5 5210static void cciss_shutdown(struct pci_dev *pdev)
1da177e4 5211{
29009a03
SC		 5212 ctlr_info_t *h;
5213 char *flush_buf;
7c832835 5214 int return_code;
1da177e4 5215
29009a03
SC		 5216 h = pci_get_drvdata(pdev);
5217 flush_buf = kzalloc(4, GFP_KERNEL);
5218 if (!flush_buf) {
b2a4a43d 5219 dev_warn(&h->pdev->dev, "cache not flushed, out of memory.\n");
e9ca75b5 5220 return;
e9ca75b5 5221 }
29009a03 5222 /* write all data in the battery backed cache to disk */
f70dba83 5223 return_code = sendcmd_withirq(h, CCISS_CACHE_FLUSH, flush_buf,
29009a03
SC		 5224 4, 0, CTLR_LUNID, TYPE_CMD);
5225 kfree(flush_buf);
5226 if (return_code != IO_OK)
b2a4a43d 5227 dev_warn(&h->pdev->dev, "Error flushing cache\n");
29009a03 5228 h->access.set_intr_mask(h, CCISS_INTR_OFF);
13049537 5229 free_irq(h->intr[h->intr_mode], h);
e9ca75b5
GB		 5230}
5231
8d85fce7 5232static int cciss_enter_simple_mode(struct ctlr_info *h)
13049537
JH		 5233{
5234 u32 trans_support;
5235
5236 trans_support = readl(&(h->cfgtable->TransportSupport));
5237 if (!(trans_support & SIMPLE_MODE))
5238 return -ENOTSUPP;
5239
5240 h->max_commands = readl(&(h->cfgtable->CmdsOutMax));
5241 writel(CFGTBL_Trans_Simple, &(h->cfgtable->HostWrite.TransportRequest));
5242 writel(CFGTBL_ChangeReq, h->vaddr + SA5_DOORBELL);
5243 cciss_wait_for_mode_change_ack(h);
5244 print_cfg_table(h);
5245 if (!(readl(&(h->cfgtable->TransportActive)) & CFGTBL_Trans_Simple)) {
5246 dev_warn(&h->pdev->dev, "unable to get board into simple mode\n");
5247 return -ENODEV;
5248 }
5249 h->transMethod = CFGTBL_Trans_Simple;
5250 return 0;
5251}
5252
5253
8d85fce7 5254static void cciss_remove_one(struct pci_dev *pdev)
e9ca75b5 5255{
f70dba83 5256 ctlr_info_t *h;
e9ca75b5
GB		 5257 int i, j;
5258
7c832835 5259 if (pci_get_drvdata(pdev) == NULL) {
b2a4a43d 5260 dev_err(&pdev->dev, "Unable to remove device\n");
1da177e4
LT		 5261 return;
5262 }
0a9279cc 5263
f70dba83
SC		 5264 h = pci_get_drvdata(pdev);
5265 i = h->ctlr;
7c832835 5266 if (hba[i] == NULL) {
b2a4a43d 5267 dev_err(&pdev->dev, "device appears to already be removed\n");
1da177e4
LT		 5268 return;
5269 }
b6550777 5270
f70dba83 5271 mutex_lock(&h->busy_shutting_down);
0a9279cc 5272
f70dba83
SC		 5273 remove_from_scan_list(h);
5274 remove_proc_entry(h->devname, proc_cciss);
5275 unregister_blkdev(h->major, h->devname);
b6550777
BH		 5276
5277 /* remove it from the disk list */
5278 for (j = 0; j < CISS_MAX_LUN; j++) {
f70dba83 5279 struct gendisk *disk = h->gendisk[j];
b6550777 5280 if (disk) {
165125e1 5281 struct request_queue *q = disk->queue;
b6550777 5282
097d0264 5283 if (disk->flags & GENHD_FL_UP) {
f70dba83 5284 cciss_destroy_ld_sysfs_entry(h, j, 1);
b6550777 5285 del_gendisk(disk);
097d0264 5286 }
b6550777
BH		 5287 if (q)
5288 blk_cleanup_queue(q);
5289 }
5290 }
5291
ba198efb 5292#ifdef CONFIG_CISS_SCSI_TAPE
f70dba83 5293 cciss_unregister_scsi(h); /* unhook from SCSI subsystem */
ba198efb 5294#endif
b6550777 5295
e9ca75b5 5296 cciss_shutdown(pdev);
fb86a35b
MM		 5297
5298#ifdef CONFIG_PCI_MSI
f70dba83
SC		 5299 if (h->msix_vector)
5300 pci_disable_msix(h->pdev);
5301 else if (h->msi_vector)
5302 pci_disable_msi(h->pdev);
7c832835 5303#endif /* CONFIG_PCI_MSI */
fb86a35b 5304
f70dba83
SC		 5305 iounmap(h->transtable);
5306 iounmap(h->cfgtable);
5307 iounmap(h->vaddr);
1da177e4 5308
54dae343 5309 cciss_free_cmd_pool(h);
5c07a311 5310 /* Free up sg elements */
f70dba83
SC		 5311 for (j = 0; j < h->nr_cmds; j++)
5312 kfree(h->scatter_list[j]);
5313 kfree(h->scatter_list);
5314 cciss_free_sg_chain_blocks(h->cmd_sg_list, h->nr_cmds);
e363e014
SC		 5315 kfree(h->blockFetchTable);
5316 if (h->reply_pool)
5317 pci_free_consistent(h->pdev, h->max_commands * sizeof(__u64),
5318 h->reply_pool, h->reply_pool_dhandle);
872225ca
MM		 5319 /*
5320 * Deliberately omit pci_disable_device(): it does something nasty to
5321 * Smart Array controllers that pci_enable_device does not undo
5322 */
7c832835 5323 pci_release_regions(pdev);
4e570309 5324 pci_set_drvdata(pdev, NULL);
f70dba83
SC		 5325 cciss_destroy_hba_sysfs_entry(h);
5326 mutex_unlock(&h->busy_shutting_down);
5327 free_hba(h);
7c832835 5328}
1da177e4
LT		 5329
5330static struct pci_driver cciss_pci_driver = {
7c832835
BH		 5331 .name = "cciss",
5332 .probe = cciss_init_one,
8d85fce7 5333 .remove = cciss_remove_one,
7c832835 5334 .id_table = cciss_pci_device_id, /* id_table */
e9ca75b5 5335 .shutdown = cciss_shutdown,
1da177e4
LT		 5336};
5337
5338/*
5339 * This is it. Register the PCI driver information for the cards we control
7c832835 5340 * the OS will call our registered routines when it finds one of our cards.
1da177e4
LT		 5341 */
5342static int __init cciss_init(void)
5343{
7fe06326
AP		 5344 int err;
5345
10cbda97
JA		 5346 /*
5347 * The hardware requires that commands are aligned on a 64-bit
5348 * boundary. Given that we use pci_alloc_consistent() to allocate an
5349 * array of them, the size must be a multiple of 8 bytes.
5350 */
1b7d0d28 5351 BUILD_BUG_ON(sizeof(CommandList_struct) % COMMANDLIST_ALIGNMENT);
1da177e4
LT		 5352 printk(KERN_INFO DRIVER_NAME "\n");
5353
7fe06326
AP		 5354 err = bus_register(&cciss_bus_type);
5355 if (err)
5356 return err;
5357
b368c9dd
AP		 5358 /* Start the scan thread */
5359 cciss_scan_thread = kthread_run(scan_thread, NULL, "cciss_scan");
5360 if (IS_ERR(cciss_scan_thread)) {
5361 err = PTR_ERR(cciss_scan_thread);
5362 goto err_bus_unregister;
5363 }
5364
1da177e4 5365 /* Register for our PCI devices */
7fe06326
AP		 5366 err = pci_register_driver(&cciss_pci_driver);
5367 if (err)
b368c9dd 5368 goto err_thread_stop;
7fe06326 5369
617e1344 5370 return err;
7fe06326 5371
b368c9dd
AP		 5372err_thread_stop:
5373 kthread_stop(cciss_scan_thread);
5374err_bus_unregister:
7fe06326 5375 bus_unregister(&cciss_bus_type);
b368c9dd 5376
7fe06326 5377 return err;
1da177e4
LT		 5378}
5379
5380static void __exit cciss_cleanup(void)
5381{
5382 int i;
5383
5384 pci_unregister_driver(&cciss_pci_driver);
5385 /* double check that all controller entrys have been removed */
7c832835
BH		 5386 for (i = 0; i < MAX_CTLR; i++) {
5387 if (hba[i] != NULL) {
b2a4a43d
SC		 5388 dev_warn(&hba[i]->pdev->dev,
5389 "had to remove controller\n");
1da177e4
LT		 5390 cciss_remove_one(hba[i]->pdev);
5391 }
5392 }
b368c9dd 5393 kthread_stop(cciss_scan_thread);
90fdb0b9
JA		 5394 if (proc_cciss)
5395 remove_proc_entry("driver/cciss", NULL);
7fe06326 5396 bus_unregister(&cciss_bus_type);
1da177e4
LT		 5397}
5398
5399module_init(cciss_init);
5400module_exit(cciss_cleanup);
Empty description
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