drivers/scsi/megaraid/megaraid_mbox.c

   1 /*
   2  *
   3  *                      Linux MegaRAID device driver
   4  *
   5  * Copyright (c) 2003-2004  LSI Logic Corporation.
   6  *
   7  *         This program is free software; you can redistribute it and/or
   8  *         modify it under the terms of the GNU General Public License
   9  *         as published by the Free Software Foundation; either version
  10  *         2 of the License, or (at your option) any later version.
  11  *
  12  * FILE         : megaraid_mbox.c
  13  * Version      : v2.20.5.1 (Nov 16 2006)
  14  *
  15  * Authors:
  16  *      Atul Mukker             <[email protected]>
  17  *      Sreenivas Bagalkote     <[email protected]>
  18  *      Manoj Jose              <[email protected]>
  19  *      Seokmann Ju
  20  *
  21  * List of supported controllers
  22  *
  23  * OEM  Product Name                    VID     DID     SSVID   SSID
  24  * ---  ------------                    ---     ---     ----    ----
  25  * Dell PERC3/QC                        101E    1960    1028    0471
  26  * Dell PERC3/DC                        101E    1960    1028    0493
  27  * Dell PERC3/SC                        101E    1960    1028    0475
  28  * Dell PERC3/Di                        1028    1960    1028    0123
  29  * Dell PERC4/SC                        1000    1960    1028    0520
  30  * Dell PERC4/DC                        1000    1960    1028    0518
  31  * Dell PERC4/QC                        1000    0407    1028    0531
  32  * Dell PERC4/Di                        1028    000F    1028    014A
  33  * Dell PERC 4e/Si                      1028    0013    1028    016c
  34  * Dell PERC 4e/Di                      1028    0013    1028    016d
  35  * Dell PERC 4e/Di                      1028    0013    1028    016e
  36  * Dell PERC 4e/Di                      1028    0013    1028    016f
  37  * Dell PERC 4e/Di                      1028    0013    1028    0170
  38  * Dell PERC 4e/DC                      1000    0408    1028    0002
  39  * Dell PERC 4e/SC                      1000    0408    1028    0001
  40  *
  41  *
  42  * LSI MegaRAID SCSI 320-0              1000    1960    1000    A520
  43  * LSI MegaRAID SCSI 320-1              1000    1960    1000    0520
  44  * LSI MegaRAID SCSI 320-2              1000    1960    1000    0518
  45  * LSI MegaRAID SCSI 320-0X             1000    0407    1000    0530
  46  * LSI MegaRAID SCSI 320-2X             1000    0407    1000    0532
  47  * LSI MegaRAID SCSI 320-4X             1000    0407    1000    0531
  48  * LSI MegaRAID SCSI 320-1E             1000    0408    1000    0001
  49  * LSI MegaRAID SCSI 320-2E             1000    0408    1000    0002
  50  * LSI MegaRAID SATA 150-4              1000    1960    1000    4523
  51  * LSI MegaRAID SATA 150-6              1000    1960    1000    0523
  52  * LSI MegaRAID SATA 300-4X             1000    0409    1000    3004
  53  * LSI MegaRAID SATA 300-8X             1000    0409    1000    3008
  54  *
  55  * INTEL RAID Controller SRCU42X        1000    0407    8086    0532
  56  * INTEL RAID Controller SRCS16         1000    1960    8086    0523
  57  * INTEL RAID Controller SRCU42E        1000    0408    8086    0002
  58  * INTEL RAID Controller SRCZCRX        1000    0407    8086    0530
  59  * INTEL RAID Controller SRCS28X        1000    0409    8086    3008
  60  * INTEL RAID Controller SROMBU42E      1000    0408    8086    3431
  61  * INTEL RAID Controller SROMBU42E      1000    0408    8086    3499
  62  * INTEL RAID Controller SRCU51L        1000    1960    8086    0520
  63  *
  64  * FSC  MegaRAID PCI Express ROMB       1000    0408    1734    1065
  65  *
  66  * ACER MegaRAID ROMB-2E                1000    0408    1025    004D
  67  *
  68  * NEC  MegaRAID PCI Express ROMB       1000    0408    1033    8287
  69  *
  70  * For history of changes, see Documentation/scsi/ChangeLog.megaraid
  71  */
  72
  73 #include <linux/slab.h>
  74 #include <linux/module.h>
  75 #include "megaraid_mbox.h"
  76
  77 static int megaraid_init(void);
  78 static void megaraid_exit(void);
  79
  80 static int megaraid_probe_one(struct pci_dev*, const struct pci_device_id *);
  81 static void megaraid_detach_one(struct pci_dev *);
  82 static void megaraid_mbox_shutdown(struct pci_dev *);
  83
  84 static int megaraid_io_attach(adapter_t *);
  85 static void megaraid_io_detach(adapter_t *);
  86
  87 static int megaraid_init_mbox(adapter_t *);
  88 static void megaraid_fini_mbox(adapter_t *);
  89
  90 static int megaraid_alloc_cmd_packets(adapter_t *);
  91 static void megaraid_free_cmd_packets(adapter_t *);
  92
  93 static int megaraid_mbox_setup_dma_pools(adapter_t *);
  94 static void megaraid_mbox_teardown_dma_pools(adapter_t *);
  95
  96 static int megaraid_sysfs_alloc_resources(adapter_t *);
  97 static void megaraid_sysfs_free_resources(adapter_t *);
  98
  99 static int megaraid_abort_handler(struct scsi_cmnd *);
 100 static int megaraid_reset_handler(struct scsi_cmnd *);
 101
 102 static int mbox_post_sync_cmd(adapter_t *, uint8_t []);
 103 static int mbox_post_sync_cmd_fast(adapter_t *, uint8_t []);
 104 static int megaraid_busywait_mbox(mraid_device_t *);
 105 static int megaraid_mbox_product_info(adapter_t *);
 106 static int megaraid_mbox_extended_cdb(adapter_t *);
 107 static int megaraid_mbox_support_ha(adapter_t *, uint16_t *);
 108 static int megaraid_mbox_support_random_del(adapter_t *);
 109 static int megaraid_mbox_get_max_sg(adapter_t *);
 110 static void megaraid_mbox_enum_raid_scsi(adapter_t *);
 111 static void megaraid_mbox_flush_cache(adapter_t *);
 112 static int megaraid_mbox_fire_sync_cmd(adapter_t *);
 113
 114 static void megaraid_mbox_display_scb(adapter_t *, scb_t *);
 115 static void megaraid_mbox_setup_device_map(adapter_t *);
 116
 117 static int megaraid_queue_command(struct Scsi_Host *, struct scsi_cmnd *);
 118 static scb_t *megaraid_mbox_build_cmd(adapter_t *, struct scsi_cmnd *, int *);
 119 static void megaraid_mbox_runpendq(adapter_t *, scb_t *);
 120 static void megaraid_mbox_prepare_pthru(adapter_t *, scb_t *,
 121                 struct scsi_cmnd *);
 122 static void megaraid_mbox_prepare_epthru(adapter_t *, scb_t *,
 123                 struct scsi_cmnd *);
 124
 125 static irqreturn_t megaraid_isr(int, void *);
 126
 127 static void megaraid_mbox_dpc(unsigned long);
 128
 129 static ssize_t megaraid_sysfs_show_app_hndl(struct device *, struct device_attribute *attr, char *);
 130 static ssize_t megaraid_sysfs_show_ldnum(struct device *, struct device_attribute *attr, char *);
 131
 132 static int megaraid_cmm_register(adapter_t *);
 133 static int megaraid_cmm_unregister(adapter_t *);
 134 static int megaraid_mbox_mm_handler(unsigned long, uioc_t *, uint32_t);
 135 static int megaraid_mbox_mm_command(adapter_t *, uioc_t *);
 136 static void megaraid_mbox_mm_done(adapter_t *, scb_t *);
 137 static int gather_hbainfo(adapter_t *, mraid_hba_info_t *);
 138 static int wait_till_fw_empty(adapter_t *);
 139
 140
 141
 142 MODULE_AUTHOR("[email protected]");
 143 MODULE_DESCRIPTION("LSI Logic MegaRAID Mailbox Driver");
 144 MODULE_LICENSE("GPL");
 145 MODULE_VERSION(MEGARAID_VERSION);
 146
 147 /*
 148  * ### modules parameters for driver ###
 149  */
 150
 151 /*
 152  * Set to enable driver to expose unconfigured disk to kernel
 153  */
 154 static int megaraid_expose_unconf_disks = 0;
 155 module_param_named(unconf_disks, megaraid_expose_unconf_disks, int, 0);
 156 MODULE_PARM_DESC(unconf_disks,
 157         "Set to expose unconfigured disks to kernel (default=0)");
 158
 159 /*
 160  * driver wait time if the adapter's mailbox is busy
 161  */
 162 static unsigned int max_mbox_busy_wait = MBOX_BUSY_WAIT;
 163 module_param_named(busy_wait, max_mbox_busy_wait, int, 0);
 164 MODULE_PARM_DESC(busy_wait,
 165         "Max wait for mailbox in microseconds if busy (default=10)");
 166
 167 /*
 168  * number of sectors per IO command
 169  */
 170 static unsigned int megaraid_max_sectors = MBOX_MAX_SECTORS;
 171 module_param_named(max_sectors, megaraid_max_sectors, int, 0);
 172 MODULE_PARM_DESC(max_sectors,
 173         "Maximum number of sectors per IO command (default=128)");
 174
 175 /*
 176  * number of commands per logical unit
 177  */
 178 static unsigned int megaraid_cmd_per_lun = MBOX_DEF_CMD_PER_LUN;
 179 module_param_named(cmd_per_lun, megaraid_cmd_per_lun, int, 0);
 180 MODULE_PARM_DESC(cmd_per_lun,
 181         "Maximum number of commands per logical unit (default=64)");
 182
 183
 184 /*
 185  * Fast driver load option, skip scanning for physical devices during load.
 186  * This would result in non-disk devices being skipped during driver load
 187  * time. These can be later added though, using /proc/scsi/scsi
 188  */
 189 static unsigned int megaraid_fast_load = 0;
 190 module_param_named(fast_load, megaraid_fast_load, int, 0);
 191 MODULE_PARM_DESC(fast_load,
 192         "Faster loading of the driver, skips physical devices! (default=0)");
 193
 194
 195 /*
 196  * mraid_debug level - threshold for amount of information to be displayed by
 197  * the driver. This level can be changed through modules parameters, ioctl or
 198  * sysfs/proc interface. By default, print the announcement messages only.
 199  */
 200 int mraid_debug_level = CL_ANN;
 201 module_param_named(debug_level, mraid_debug_level, int, 0);
 202 MODULE_PARM_DESC(debug_level, "Debug level for driver (default=0)");
 203
 204 /*
 205  * PCI table for all supported controllers.
 206  */
 207 static struct pci_device_id pci_id_table_g[] =  {
 208         {
 209                 PCI_VENDOR_ID_DELL,
 210                 PCI_DEVICE_ID_PERC4_DI_DISCOVERY,
 211                 PCI_VENDOR_ID_DELL,
 212                 PCI_SUBSYS_ID_PERC4_DI_DISCOVERY,
 213         },
 214         {
 215                 PCI_VENDOR_ID_LSI_LOGIC,
 216                 PCI_DEVICE_ID_PERC4_SC,
 217                 PCI_VENDOR_ID_DELL,
 218                 PCI_SUBSYS_ID_PERC4_SC,
 219         },
 220         {
 221                 PCI_VENDOR_ID_LSI_LOGIC,
 222                 PCI_DEVICE_ID_PERC4_DC,
 223                 PCI_VENDOR_ID_DELL,
 224                 PCI_SUBSYS_ID_PERC4_DC,
 225         },
 226         {
 227                 PCI_VENDOR_ID_LSI_LOGIC,
 228                 PCI_DEVICE_ID_VERDE,
 229                 PCI_ANY_ID,
 230                 PCI_ANY_ID,
 231         },
 232         {
 233                 PCI_VENDOR_ID_DELL,
 234                 PCI_DEVICE_ID_PERC4_DI_EVERGLADES,
 235                 PCI_VENDOR_ID_DELL,
 236                 PCI_SUBSYS_ID_PERC4_DI_EVERGLADES,
 237         },
 238         {
 239                 PCI_VENDOR_ID_DELL,
 240                 PCI_DEVICE_ID_PERC4E_SI_BIGBEND,
 241                 PCI_VENDOR_ID_DELL,
 242                 PCI_SUBSYS_ID_PERC4E_SI_BIGBEND,
 243         },
 244         {
 245                 PCI_VENDOR_ID_DELL,
 246                 PCI_DEVICE_ID_PERC4E_DI_KOBUK,
 247                 PCI_VENDOR_ID_DELL,
 248                 PCI_SUBSYS_ID_PERC4E_DI_KOBUK,
 249         },
 250         {
 251                 PCI_VENDOR_ID_DELL,
 252                 PCI_DEVICE_ID_PERC4E_DI_CORVETTE,
 253                 PCI_VENDOR_ID_DELL,
 254                 PCI_SUBSYS_ID_PERC4E_DI_CORVETTE,
 255         },
 256         {
 257                 PCI_VENDOR_ID_DELL,
 258                 PCI_DEVICE_ID_PERC4E_DI_EXPEDITION,
 259                 PCI_VENDOR_ID_DELL,
 260                 PCI_SUBSYS_ID_PERC4E_DI_EXPEDITION,
 261         },
 262         {
 263                 PCI_VENDOR_ID_DELL,
 264                 PCI_DEVICE_ID_PERC4E_DI_GUADALUPE,
 265                 PCI_VENDOR_ID_DELL,
 266                 PCI_SUBSYS_ID_PERC4E_DI_GUADALUPE,
 267         },
 268         {
 269                 PCI_VENDOR_ID_LSI_LOGIC,
 270                 PCI_DEVICE_ID_DOBSON,
 271                 PCI_ANY_ID,
 272                 PCI_ANY_ID,
 273         },
 274         {
 275                 PCI_VENDOR_ID_AMI,
 276                 PCI_DEVICE_ID_AMI_MEGARAID3,
 277                 PCI_ANY_ID,
 278                 PCI_ANY_ID,
 279         },
 280         {
 281                 PCI_VENDOR_ID_LSI_LOGIC,
 282                 PCI_DEVICE_ID_AMI_MEGARAID3,
 283                 PCI_ANY_ID,
 284                 PCI_ANY_ID,
 285         },
 286         {
 287                 PCI_VENDOR_ID_LSI_LOGIC,
 288                 PCI_DEVICE_ID_LINDSAY,
 289                 PCI_ANY_ID,
 290                 PCI_ANY_ID,
 291         },
 292         {0}     /* Terminating entry */
 293 };
 294 MODULE_DEVICE_TABLE(pci, pci_id_table_g);
 295
 296
 297 static struct pci_driver megaraid_pci_driver = {
 298         .name           = "megaraid",
 299         .id_table       = pci_id_table_g,
 300         .probe          = megaraid_probe_one,
 301         .remove         = megaraid_detach_one,
 302         .shutdown       = megaraid_mbox_shutdown,
 303 };
 304
 305
 306
 307 // definitions for the device attributes for exporting logical drive number
 308 // for a scsi address (Host, Channel, Id, Lun)
 309
 310 DEVICE_ATTR(megaraid_mbox_app_hndl, S_IRUSR, megaraid_sysfs_show_app_hndl,
 311                 NULL);
 312
 313 // Host template initializer for megaraid mbox sysfs device attributes
 314 static struct device_attribute *megaraid_shost_attrs[] = {
 315         &dev_attr_megaraid_mbox_app_hndl,
 316         NULL,
 317 };
 318
 319
 320 DEVICE_ATTR(megaraid_mbox_ld, S_IRUSR, megaraid_sysfs_show_ldnum, NULL);
 321
 322 // Host template initializer for megaraid mbox sysfs device attributes
 323 static struct device_attribute *megaraid_sdev_attrs[] = {
 324         &dev_attr_megaraid_mbox_ld,
 325         NULL,
 326 };
 327
 328 /*
 329  * Scsi host template for megaraid unified driver
 330  */
 331 static struct scsi_host_template megaraid_template_g = {
 332         .module                         = THIS_MODULE,
 333         .name                           = "LSI Logic MegaRAID driver",
 334         .proc_name                      = "megaraid",
 335         .queuecommand                   = megaraid_queue_command,
 336         .eh_abort_handler               = megaraid_abort_handler,
 337         .eh_host_reset_handler          = megaraid_reset_handler,
 338         .change_queue_depth             = scsi_change_queue_depth,
 339         .use_clustering                 = ENABLE_CLUSTERING,
 340         .no_write_same                  = 1,
 341         .sdev_attrs                     = megaraid_sdev_attrs,
 342         .shost_attrs                    = megaraid_shost_attrs,
 343 };
 344
 345
 346 /**
 347  * megaraid_init - module load hook
 348  *
 349  * We register ourselves as hotplug enabled module and let PCI subsystem
 350  * discover our adapters.
 351  */
 352 static int __init
 353 megaraid_init(void)
 354 {
 355         int     rval;
 356
 357         // Announce the driver version
 358         con_log(CL_ANN, (KERN_INFO "megaraid: %s %s\n", MEGARAID_VERSION,
 359                 MEGARAID_EXT_VERSION));
 360
 361         // check validity of module parameters
 362         if (megaraid_cmd_per_lun > MBOX_MAX_SCSI_CMDS) {
 363
 364                 con_log(CL_ANN, (KERN_WARNING
 365                         "megaraid mailbox: max commands per lun reset to %d\n",
 366                         MBOX_MAX_SCSI_CMDS));
 367
 368                 megaraid_cmd_per_lun = MBOX_MAX_SCSI_CMDS;
 369         }
 370
 371
 372         // register as a PCI hot-plug driver module
 373         rval = pci_register_driver(&megaraid_pci_driver);
 374         if (rval < 0) {
 375                 con_log(CL_ANN, (KERN_WARNING
 376                         "megaraid: could not register hotplug support.\n"));
 377         }
 378
 379         return rval;
 380 }
 381
 382
 383 /**
 384  * megaraid_exit - driver unload entry point
 385  *
 386  * We simply unwrap the megaraid_init routine here.
 387  */
 388 static void __exit
 389 megaraid_exit(void)
 390 {
 391         con_log(CL_DLEVEL1, (KERN_NOTICE "megaraid: unloading framework\n"));
 392
 393         // unregister as PCI hotplug driver
 394         pci_unregister_driver(&megaraid_pci_driver);
 395
 396         return;
 397 }
 398
 399
 400 /**
 401  * megaraid_probe_one - PCI hotplug entry point
 402  * @pdev        : handle to this controller's PCI configuration space
 403  * @id          : pci device id of the class of controllers
 404  *
 405  * This routine should be called whenever a new adapter is detected by the
 406  * PCI hotplug susbsystem.
 407  */
 408 static int
 409 megaraid_probe_one(struct pci_dev *pdev, const struct pci_device_id *id)
 410 {
 411         adapter_t       *adapter;
 412
 413
 414         // detected a new controller
 415         con_log(CL_ANN, (KERN_INFO
 416                 "megaraid: probe new device %#4.04x:%#4.04x:%#4.04x:%#4.04x: ",
 417                 pdev->vendor, pdev->device, pdev->subsystem_vendor,
 418                 pdev->subsystem_device));
 419
 420         con_log(CL_ANN, ("bus %d:slot %d:func %d\n", pdev->bus->number,
 421                 PCI_SLOT(pdev->devfn), PCI_FUNC(pdev->devfn)));
 422
 423         if (pci_enable_device(pdev)) {
 424                 con_log(CL_ANN, (KERN_WARNING
 425                                 "megaraid: pci_enable_device failed\n"));
 426
 427                 return -ENODEV;
 428         }
 429
 430         // Enable bus-mastering on this controller
 431         pci_set_master(pdev);
 432
 433         // Allocate the per driver initialization structure
 434         adapter = kzalloc(sizeof(adapter_t), GFP_KERNEL);
 435
 436         if (adapter == NULL) {
 437                 con_log(CL_ANN, (KERN_WARNING
 438                 "megaraid: out of memory, %s %d.\n", __func__, __LINE__));
 439
 440                 goto out_probe_one;
 441         }
 442
 443
 444         // set up PCI related soft state and other pre-known parameters
 445         adapter->unique_id      = pdev->bus->number << 8 | pdev->devfn;
 446         adapter->irq            = pdev->irq;
 447         adapter->pdev           = pdev;
 448
 449         atomic_set(&adapter->being_detached, 0);
 450
 451         // Setup the default DMA mask. This would be changed later on
 452         // depending on hardware capabilities
 453         if (dma_set_mask(&adapter->pdev->dev, DMA_BIT_MASK(32))) {
 454                 con_log(CL_ANN, (KERN_WARNING
 455                         "megaraid: dma_set_mask failed:%d\n", __LINE__));
 456
 457                 goto out_free_adapter;
 458         }
 459
 460
 461         // Initialize the synchronization lock for kernel and LLD
 462         spin_lock_init(&adapter->lock);
 463
 464         // Initialize the command queues: the list of free SCBs and the list
 465         // of pending SCBs.
 466         INIT_LIST_HEAD(&adapter->kscb_pool);
 467         spin_lock_init(SCSI_FREE_LIST_LOCK(adapter));
 468
 469         INIT_LIST_HEAD(&adapter->pend_list);
 470         spin_lock_init(PENDING_LIST_LOCK(adapter));
 471
 472         INIT_LIST_HEAD(&adapter->completed_list);
 473         spin_lock_init(COMPLETED_LIST_LOCK(adapter));
 474
 475
 476         // Start the mailbox based controller
 477         if (megaraid_init_mbox(adapter) != 0) {
 478                 con_log(CL_ANN, (KERN_WARNING
 479                         "megaraid: mailbox adapter did not initialize\n"));
 480
 481                 goto out_free_adapter;
 482         }
 483
 484         // Register with LSI Common Management Module
 485         if (megaraid_cmm_register(adapter) != 0) {
 486
 487                 con_log(CL_ANN, (KERN_WARNING
 488                 "megaraid: could not register with management module\n"));
 489
 490                 goto out_fini_mbox;
 491         }
 492
 493         // setup adapter handle in PCI soft state
 494         pci_set_drvdata(pdev, adapter);
 495
 496         // attach with scsi mid-layer
 497         if (megaraid_io_attach(adapter) != 0) {
 498
 499                 con_log(CL_ANN, (KERN_WARNING "megaraid: io attach failed\n"));
 500
 501                 goto out_cmm_unreg;
 502         }
 503
 504         return 0;
 505
 506 out_cmm_unreg:
 507         megaraid_cmm_unregister(adapter);
 508 out_fini_mbox:
 509         megaraid_fini_mbox(adapter);
 510 out_free_adapter:
 511         kfree(adapter);
 512 out_probe_one:
 513         pci_disable_device(pdev);
 514
 515         return -ENODEV;
 516 }
 517
 518
 519 /**
 520  * megaraid_detach_one - release framework resources and call LLD release routine
 521  * @pdev        : handle for our PCI configuration space
 522  *
 523  * This routine is called during driver unload. We free all the allocated
 524  * resources and call the corresponding LLD so that it can also release all
 525  * its resources.
 526  *
 527  * This routine is also called from the PCI hotplug system.
 528  */
 529 static void
 530 megaraid_detach_one(struct pci_dev *pdev)
 531 {
 532         adapter_t               *adapter;
 533         struct Scsi_Host        *host;
 534
 535
 536         // Start a rollback on this adapter
 537         adapter = pci_get_drvdata(pdev);
 538
 539         if (!adapter) {
 540                 con_log(CL_ANN, (KERN_CRIT
 541                 "megaraid: Invalid detach on %#4.04x:%#4.04x:%#4.04x:%#4.04x\n",
 542                         pdev->vendor, pdev->device, pdev->subsystem_vendor,
 543                         pdev->subsystem_device));
 544
 545                 return;
 546         }
 547         else {
 548                 con_log(CL_ANN, (KERN_NOTICE
 549                 "megaraid: detaching device %#4.04x:%#4.04x:%#4.04x:%#4.04x\n",
 550                         pdev->vendor, pdev->device, pdev->subsystem_vendor,
 551                         pdev->subsystem_device));
 552         }
 553
 554
 555         host = adapter->host;
 556
 557         // do not allow any more requests from the management module for this
 558         // adapter.
 559         // FIXME: How do we account for the request which might still be
 560         // pending with us?
 561         atomic_set(&adapter->being_detached, 1);
 562
 563         // detach from the IO sub-system
 564         megaraid_io_detach(adapter);
 565
 566         // Unregister from common management module
 567         //
 568         // FIXME: this must return success or failure for conditions if there
 569         // is a command pending with LLD or not.
 570         megaraid_cmm_unregister(adapter);
 571
 572         // finalize the mailbox based controller and release all resources
 573         megaraid_fini_mbox(adapter);
 574
 575         kfree(adapter);
 576
 577         scsi_host_put(host);
 578
 579         pci_disable_device(pdev);
 580
 581         return;
 582 }
 583
 584
 585 /**
 586  * megaraid_mbox_shutdown - PCI shutdown for megaraid HBA
 587  * @pdev                : generic driver model device
 588  *
 589  * Shutdown notification, perform flush cache.
 590  */
 591 static void
 592 megaraid_mbox_shutdown(struct pci_dev *pdev)
 593 {
 594         adapter_t               *adapter = pci_get_drvdata(pdev);
 595         static int              counter;
 596
 597         if (!adapter) {
 598                 con_log(CL_ANN, (KERN_WARNING
 599                         "megaraid: null device in shutdown\n"));
 600                 return;
 601         }
 602
 603         // flush caches now
 604         con_log(CL_ANN, (KERN_INFO "megaraid: flushing adapter %d...",
 605                 counter++));
 606
 607         megaraid_mbox_flush_cache(adapter);
 608
 609         con_log(CL_ANN, ("done\n"));
 610 }
 611
 612
 613 /**
 614  * megaraid_io_attach - attach a device with the IO subsystem
 615  * @adapter             : controller's soft state
 616  *
 617  * Attach this device with the IO subsystem.
 618  */
 619 static int
 620 megaraid_io_attach(adapter_t *adapter)
 621 {
 622         struct Scsi_Host        *host;
 623
 624         // Initialize SCSI Host structure
 625         host = scsi_host_alloc(&megaraid_template_g, 8);
 626         if (!host) {
 627                 con_log(CL_ANN, (KERN_WARNING
 628                         "megaraid mbox: scsi_register failed\n"));
 629
 630                 return -1;
 631         }
 632
 633         SCSIHOST2ADAP(host)     = (caddr_t)adapter;
 634         adapter->host           = host;
 635
 636         host->irq               = adapter->irq;
 637         host->unique_id         = adapter->unique_id;
 638         host->can_queue         = adapter->max_cmds;
 639         host->this_id           = adapter->init_id;
 640         host->sg_tablesize      = adapter->sglen;
 641         host->max_sectors       = adapter->max_sectors;
 642         host->cmd_per_lun       = adapter->cmd_per_lun;
 643         host->max_channel       = adapter->max_channel;
 644         host->max_id            = adapter->max_target;
 645         host->max_lun           = adapter->max_lun;
 646
 647
 648         // notify mid-layer about the new controller
 649         if (scsi_add_host(host, &adapter->pdev->dev)) {
 650
 651                 con_log(CL_ANN, (KERN_WARNING
 652                         "megaraid mbox: scsi_add_host failed\n"));
 653
 654                 scsi_host_put(host);
 655
 656                 return -1;
 657         }
 658
 659         scsi_scan_host(host);
 660
 661         return 0;
 662 }
 663
 664
 665 /**
 666  * megaraid_io_detach - detach a device from the IO subsystem
 667  * @adapter             : controller's soft state
 668  *
 669  * Detach this device from the IO subsystem.
 670  */
 671 static void
 672 megaraid_io_detach(adapter_t *adapter)
 673 {
 674         struct Scsi_Host        *host;
 675
 676         con_log(CL_DLEVEL1, (KERN_INFO "megaraid: io detach\n"));
 677
 678         host = adapter->host;
 679
 680         scsi_remove_host(host);
 681
 682         return;
 683 }
 684
 685
 686 /*
 687  * START: Mailbox Low Level Driver
 688  *
 689  * This is section specific to the single mailbox based controllers
 690  */
 691
 692 /**
 693  * megaraid_init_mbox - initialize controller
 694  * @adapter             : our soft state
 695  *
 696  * - Allocate 16-byte aligned mailbox memory for firmware handshake
 697  * - Allocate controller's memory resources
 698  * - Find out all initialization data
 699  * - Allocate memory required for all the commands
 700  * - Use internal library of FW routines, build up complete soft state
 701  */
 702 static int
 703 megaraid_init_mbox(adapter_t *adapter)
 704 {
 705         struct pci_dev          *pdev;
 706         mraid_device_t          *raid_dev;
 707         int                     i;
 708         uint32_t                magic64;
 709
 710
 711         adapter->ito    = MBOX_TIMEOUT;
 712         pdev            = adapter->pdev;
 713
 714         /*
 715          * Allocate and initialize the init data structure for mailbox
 716          * controllers
 717          */
 718         raid_dev = kzalloc(sizeof(mraid_device_t), GFP_KERNEL);
 719         if (raid_dev == NULL) return -1;
 720
 721
 722         /*
 723          * Attach the adapter soft state to raid device soft state
 724          */
 725         adapter->raid_device    = (caddr_t)raid_dev;
 726         raid_dev->fast_load     = megaraid_fast_load;
 727
 728
 729         // our baseport
 730         raid_dev->baseport = pci_resource_start(pdev, 0);
 731
 732         if (pci_request_regions(pdev, "MegaRAID: LSI Logic Corporation") != 0) {
 733
 734                 con_log(CL_ANN, (KERN_WARNING
 735                                 "megaraid: mem region busy\n"));
 736
 737                 goto out_free_raid_dev;
 738         }
 739
 740         raid_dev->baseaddr = ioremap_nocache(raid_dev->baseport, 128);
 741
 742         if (!raid_dev->baseaddr) {
 743
 744                 con_log(CL_ANN, (KERN_WARNING
 745                         "megaraid: could not map hba memory\n") );
 746
 747                 goto out_release_regions;
 748         }
 749
 750         /* initialize the mutual exclusion lock for the mailbox */
 751         spin_lock_init(&raid_dev->mailbox_lock);
 752
 753         /* allocate memory required for commands */
 754         if (megaraid_alloc_cmd_packets(adapter) != 0)
 755                 goto out_iounmap;
 756
 757         /*
 758          * Issue SYNC cmd to flush the pending cmds in the adapter
 759          * and initialize its internal state
 760          */
 761
 762         if (megaraid_mbox_fire_sync_cmd(adapter))
 763                 con_log(CL_ANN, ("megaraid: sync cmd failed\n"));
 764
 765         /*
 766          * Setup the rest of the soft state using the library of
 767          * FW routines
 768          */
 769
 770         /* request IRQ and register the interrupt service routine */
 771         if (request_irq(adapter->irq, megaraid_isr, IRQF_SHARED, "megaraid",
 772                 adapter)) {
 773
 774                 con_log(CL_ANN, (KERN_WARNING
 775                         "megaraid: Couldn't register IRQ %d!\n", adapter->irq));
 776                 goto out_alloc_cmds;
 777
 778         }
 779
 780         // Product info
 781         if (megaraid_mbox_product_info(adapter) != 0)
 782                 goto out_free_irq;
 783
 784         // Do we support extended CDBs
 785         adapter->max_cdb_sz = 10;
 786         if (megaraid_mbox_extended_cdb(adapter) == 0) {
 787                 adapter->max_cdb_sz = 16;
 788         }
 789
 790         /*
 791          * Do we support cluster environment, if we do, what is the initiator
 792          * id.
 793          * NOTE: In a non-cluster aware firmware environment, the LLD should
 794          * return 7 as initiator id.
 795          */
 796         adapter->ha             = 0;
 797         adapter->init_id        = -1;
 798         if (megaraid_mbox_support_ha(adapter, &adapter->init_id) == 0) {
 799                 adapter->ha = 1;
 800         }
 801
 802         /*
 803          * Prepare the device ids array to have the mapping between the kernel
 804          * device address and megaraid device address.
 805          * We export the physical devices on their actual addresses. The
 806          * logical drives are exported on a virtual SCSI channel
 807          */
 808         megaraid_mbox_setup_device_map(adapter);
 809
 810         // If the firmware supports random deletion, update the device id map
 811         if (megaraid_mbox_support_random_del(adapter)) {
 812
 813                 // Change the logical drives numbers in device_ids array one
 814                 // slot in device_ids is reserved for target id, that's why
 815                 // "<=" below
 816                 for (i = 0; i <= MAX_LOGICAL_DRIVES_40LD; i++) {
 817                         adapter->device_ids[adapter->max_channel][i] += 0x80;
 818                 }
 819                 adapter->device_ids[adapter->max_channel][adapter->init_id] =
 820                         0xFF;
 821
 822                 raid_dev->random_del_supported = 1;
 823         }
 824
 825         /*
 826          * find out the maximum number of scatter-gather elements supported by
 827          * this firmware
 828          */
 829         adapter->sglen = megaraid_mbox_get_max_sg(adapter);
 830
 831         // enumerate RAID and SCSI channels so that all devices on SCSI
 832         // channels can later be exported, including disk devices
 833         megaraid_mbox_enum_raid_scsi(adapter);
 834
 835         /*
 836          * Other parameters required by upper layer
 837          *
 838          * maximum number of sectors per IO command
 839          */
 840         adapter->max_sectors = megaraid_max_sectors;
 841
 842         /*
 843          * number of queued commands per LUN.
 844          */
 845         adapter->cmd_per_lun = megaraid_cmd_per_lun;
 846
 847         /*
 848          * Allocate resources required to issue FW calls, when sysfs is
 849          * accessed
 850          */
 851         if (megaraid_sysfs_alloc_resources(adapter) != 0)
 852                 goto out_free_irq;
 853
 854         // Set the DMA mask to 64-bit. All supported controllers as capable of
 855         // DMA in this range
 856         pci_read_config_dword(adapter->pdev, PCI_CONF_AMISIG64, &magic64);
 857
 858         if (((magic64 == HBA_SIGNATURE_64_BIT) &&
 859                 ((adapter->pdev->subsystem_device !=
 860                 PCI_SUBSYS_ID_MEGARAID_SATA_150_6) &&
 861                 (adapter->pdev->subsystem_device !=
 862                 PCI_SUBSYS_ID_MEGARAID_SATA_150_4))) ||
 863                 (adapter->pdev->vendor == PCI_VENDOR_ID_LSI_LOGIC &&
 864                 adapter->pdev->device == PCI_DEVICE_ID_VERDE) ||
 865                 (adapter->pdev->vendor == PCI_VENDOR_ID_LSI_LOGIC &&
 866                 adapter->pdev->device == PCI_DEVICE_ID_DOBSON) ||
 867                 (adapter->pdev->vendor == PCI_VENDOR_ID_LSI_LOGIC &&
 868                 adapter->pdev->device == PCI_DEVICE_ID_LINDSAY) ||
 869                 (adapter->pdev->vendor == PCI_VENDOR_ID_DELL &&
 870                 adapter->pdev->device == PCI_DEVICE_ID_PERC4_DI_EVERGLADES) ||
 871                 (adapter->pdev->vendor == PCI_VENDOR_ID_DELL &&
 872                 adapter->pdev->device == PCI_DEVICE_ID_PERC4E_DI_KOBUK)) {
 873                 if (dma_set_mask(&adapter->pdev->dev, DMA_BIT_MASK(64))) {
 874                         con_log(CL_ANN, (KERN_WARNING
 875                                 "megaraid: DMA mask for 64-bit failed\n"));
 876
 877                         if (dma_set_mask(&adapter->pdev->dev,
 878                                                 DMA_BIT_MASK(32))) {
 879                                 con_log(CL_ANN, (KERN_WARNING
 880                                         "megaraid: 32-bit DMA mask failed\n"));
 881                                 goto out_free_sysfs_res;
 882                         }
 883                 }
 884         }
 885
 886         // setup tasklet for DPC
 887         tasklet_init(&adapter->dpc_h, megaraid_mbox_dpc,
 888                         (unsigned long)adapter);
 889
 890         con_log(CL_DLEVEL1, (KERN_INFO
 891                 "megaraid mbox hba successfully initialized\n"));
 892
 893         return 0;
 894
 895 out_free_sysfs_res:
 896         megaraid_sysfs_free_resources(adapter);
 897 out_free_irq:
 898         free_irq(adapter->irq, adapter);
 899 out_alloc_cmds:
 900         megaraid_free_cmd_packets(adapter);
 901 out_iounmap:
 902         iounmap(raid_dev->baseaddr);
 903 out_release_regions:
 904         pci_release_regions(pdev);
 905 out_free_raid_dev:
 906         kfree(raid_dev);
 907
 908         return -1;
 909 }
 910
 911
 912 /**
 913  * megaraid_fini_mbox - undo controller initialization
 914  * @adapter             : our soft state
 915  */
 916 static void
 917 megaraid_fini_mbox(adapter_t *adapter)
 918 {
 919         mraid_device_t *raid_dev = ADAP2RAIDDEV(adapter);
 920
 921         // flush all caches
 922         megaraid_mbox_flush_cache(adapter);
 923
 924         tasklet_kill(&adapter->dpc_h);
 925
 926         megaraid_sysfs_free_resources(adapter);
 927
 928         megaraid_free_cmd_packets(adapter);
 929
 930         free_irq(adapter->irq, adapter);
 931
 932         iounmap(raid_dev->baseaddr);
 933
 934         pci_release_regions(adapter->pdev);
 935
 936         kfree(raid_dev);
 937
 938         return;
 939 }
 940
 941
 942 /**
 943  * megaraid_alloc_cmd_packets - allocate shared mailbox
 944  * @adapter             : soft state of the raid controller
 945  *
 946  * Allocate and align the shared mailbox. This mailbox is used to issue
 947  * all the commands. For IO based controllers, the mailbox is also registered
 948  * with the FW. Allocate memory for all commands as well.
 949  * This is our big allocator.
 950  */
 951 static int
 952 megaraid_alloc_cmd_packets(adapter_t *adapter)
 953 {
 954         mraid_device_t          *raid_dev = ADAP2RAIDDEV(adapter);
 955         struct pci_dev          *pdev;
 956         unsigned long           align;
 957         scb_t                   *scb;
 958         mbox_ccb_t              *ccb;
 959         struct mraid_pci_blk    *epthru_pci_blk;
 960         struct mraid_pci_blk    *sg_pci_blk;
 961         struct mraid_pci_blk    *mbox_pci_blk;
 962         int                     i;
 963
 964         pdev = adapter->pdev;
 965
 966         /*
 967          * Setup the mailbox
 968          * Allocate the common 16-byte aligned memory for the handshake
 969          * mailbox.
 970          */
 971         raid_dev->una_mbox64 = dma_zalloc_coherent(&adapter->pdev->dev,
 972                         sizeof(mbox64_t), &raid_dev->una_mbox64_dma,
 973                         GFP_KERNEL);
 974
 975         if (!raid_dev->una_mbox64) {
 976                 con_log(CL_ANN, (KERN_WARNING
 977                         "megaraid: out of memory, %s %d\n", __func__,
 978                         __LINE__));
 979                 return -1;
 980         }
 981
 982         /*
 983          * Align the mailbox at 16-byte boundary
 984          */
 985         raid_dev->mbox  = &raid_dev->una_mbox64->mbox32;
 986
 987         raid_dev->mbox  = (mbox_t *)((((unsigned long)raid_dev->mbox) + 15) &
 988                                 (~0UL ^ 0xFUL));
 989
 990         raid_dev->mbox64 = (mbox64_t *)(((unsigned long)raid_dev->mbox) - 8);
 991
 992         align = ((void *)raid_dev->mbox -
 993                         ((void *)&raid_dev->una_mbox64->mbox32));
 994
 995         raid_dev->mbox_dma = (unsigned long)raid_dev->una_mbox64_dma + 8 +
 996                         align;
 997
 998         // Allocate memory for commands issued internally
 999         adapter->ibuf = dma_zalloc_coherent(&pdev->dev, MBOX_IBUF_SIZE,
1000                         &adapter->ibuf_dma_h, GFP_KERNEL);
1001         if (!adapter->ibuf) {
1002
1003                 con_log(CL_ANN, (KERN_WARNING
1004                         "megaraid: out of memory, %s %d\n", __func__,
1005                         __LINE__));
1006
1007                 goto out_free_common_mbox;
1008         }
1009
1010         // Allocate memory for our SCSI Command Blocks and their associated
1011         // memory
1012
1013         /*
1014          * Allocate memory for the base list of scb. Later allocate memory for
1015          * CCBs and embedded components of each CCB and point the pointers in
1016          * scb to the allocated components
1017          * NOTE: The code to allocate SCB will be duplicated in all the LLD
1018          * since the calling routine does not yet know the number of available
1019          * commands.
1020          */
1021         adapter->kscb_list = kcalloc(MBOX_MAX_SCSI_CMDS, sizeof(scb_t), GFP_KERNEL);
1022
1023         if (adapter->kscb_list == NULL) {
1024                 con_log(CL_ANN, (KERN_WARNING
1025                         "megaraid: out of memory, %s %d\n", __func__,
1026                         __LINE__));
1027                 goto out_free_ibuf;
1028         }
1029
1030         // memory allocation for our command packets
1031         if (megaraid_mbox_setup_dma_pools(adapter) != 0) {
1032                 con_log(CL_ANN, (KERN_WARNING
1033                         "megaraid: out of memory, %s %d\n", __func__,
1034                         __LINE__));
1035                 goto out_free_scb_list;
1036         }
1037
1038         // Adjust the scb pointers and link in the free pool
1039         epthru_pci_blk  = raid_dev->epthru_pool;
1040         sg_pci_blk      = raid_dev->sg_pool;
1041         mbox_pci_blk    = raid_dev->mbox_pool;
1042
1043         for (i = 0; i < MBOX_MAX_SCSI_CMDS; i++) {
1044                 scb                     = adapter->kscb_list + i;
1045                 ccb                     = raid_dev->ccb_list + i;
1046
1047                 ccb->mbox       = (mbox_t *)(mbox_pci_blk[i].vaddr + 16);
1048                 ccb->raw_mbox   = (uint8_t *)ccb->mbox;
1049                 ccb->mbox64     = (mbox64_t *)(mbox_pci_blk[i].vaddr + 8);
1050                 ccb->mbox_dma_h = (unsigned long)mbox_pci_blk[i].dma_addr + 16;
1051
1052                 // make sure the mailbox is aligned properly
1053                 if (ccb->mbox_dma_h & 0x0F) {
1054                         con_log(CL_ANN, (KERN_CRIT
1055                                 "megaraid mbox: not aligned on 16-bytes\n"));
1056
1057                         goto out_teardown_dma_pools;
1058                 }
1059
1060                 ccb->epthru             = (mraid_epassthru_t *)
1061                                                 epthru_pci_blk[i].vaddr;
1062                 ccb->epthru_dma_h       = epthru_pci_blk[i].dma_addr;
1063                 ccb->pthru              = (mraid_passthru_t *)ccb->epthru;
1064                 ccb->pthru_dma_h        = ccb->epthru_dma_h;
1065
1066
1067                 ccb->sgl64              = (mbox_sgl64 *)sg_pci_blk[i].vaddr;
1068                 ccb->sgl_dma_h          = sg_pci_blk[i].dma_addr;
1069                 ccb->sgl32              = (mbox_sgl32 *)ccb->sgl64;
1070
1071                 scb->ccb                = (caddr_t)ccb;
1072                 scb->gp                 = 0;
1073
1074                 scb->sno                = i;    // command index
1075
1076                 scb->scp                = NULL;
1077                 scb->state              = SCB_FREE;
1078                 scb->dma_direction      = DMA_NONE;
1079                 scb->dma_type           = MRAID_DMA_NONE;
1080                 scb->dev_channel        = -1;
1081                 scb->dev_target         = -1;
1082
1083                 // put scb in the free pool
1084                 list_add_tail(&scb->list, &adapter->kscb_pool);
1085         }
1086
1087         return 0;
1088
1089 out_teardown_dma_pools:
1090         megaraid_mbox_teardown_dma_pools(adapter);
1091 out_free_scb_list:
1092         kfree(adapter->kscb_list);
1093 out_free_ibuf:
1094         dma_free_coherent(&pdev->dev, MBOX_IBUF_SIZE, (void *)adapter->ibuf,
1095                 adapter->ibuf_dma_h);
1096 out_free_common_mbox:
1097         dma_free_coherent(&adapter->pdev->dev, sizeof(mbox64_t),
1098                 (caddr_t)raid_dev->una_mbox64, raid_dev->una_mbox64_dma);
1099
1100         return -1;
1101 }
1102
1103
1104 /**
1105  * megaraid_free_cmd_packets - free memory
1106  * @adapter             : soft state of the raid controller
1107  *
1108  * Release memory resources allocated for commands.
1109  */
1110 static void
1111 megaraid_free_cmd_packets(adapter_t *adapter)
1112 {
1113         mraid_device_t *raid_dev = ADAP2RAIDDEV(adapter);
1114
1115         megaraid_mbox_teardown_dma_pools(adapter);
1116
1117         kfree(adapter->kscb_list);
1118
1119         dma_free_coherent(&adapter->pdev->dev, MBOX_IBUF_SIZE,
1120                 (void *)adapter->ibuf, adapter->ibuf_dma_h);
1121
1122         dma_free_coherent(&adapter->pdev->dev, sizeof(mbox64_t),
1123                 (caddr_t)raid_dev->una_mbox64, raid_dev->una_mbox64_dma);
1124         return;
1125 }
1126
1127
1128 /**
1129  * megaraid_mbox_setup_dma_pools - setup dma pool for command packets
1130  * @adapter             : HBA soft state
1131  *
1132  * Setup the dma pools for mailbox, passthru and extended passthru structures,
1133  * and scatter-gather lists.
1134  */
1135 static int
1136 megaraid_mbox_setup_dma_pools(adapter_t *adapter)
1137 {
1138         mraid_device_t          *raid_dev = ADAP2RAIDDEV(adapter);
1139         struct mraid_pci_blk    *epthru_pci_blk;
1140         struct mraid_pci_blk    *sg_pci_blk;
1141         struct mraid_pci_blk    *mbox_pci_blk;
1142         int                     i;
1143
1144
1145
1146         // Allocate memory for 16-bytes aligned mailboxes
1147         raid_dev->mbox_pool_handle = dma_pool_create("megaraid mbox pool",
1148                                                 &adapter->pdev->dev,
1149                                                 sizeof(mbox64_t) + 16,
1150                                                 16, 0);
1151
1152         if (raid_dev->mbox_pool_handle == NULL) {
1153                 goto fail_setup_dma_pool;
1154         }
1155
1156         mbox_pci_blk = raid_dev->mbox_pool;
1157         for (i = 0; i < MBOX_MAX_SCSI_CMDS; i++) {
1158                 mbox_pci_blk[i].vaddr = dma_pool_alloc(
1159                                                 raid_dev->mbox_pool_handle,
1160                                                 GFP_KERNEL,
1161                                                 &mbox_pci_blk[i].dma_addr);
1162                 if (!mbox_pci_blk[i].vaddr) {
1163                         goto fail_setup_dma_pool;
1164                 }
1165         }
1166
1167         /*
1168          * Allocate memory for each embedded passthru strucuture pointer
1169          * Request for a 128 bytes aligned structure for each passthru command
1170          * structure
1171          * Since passthru and extended passthru commands are exclusive, they
1172          * share common memory pool. Passthru structures piggyback on memory
1173          * allocted to extended passthru since passthru is smaller of the two
1174          */
1175         raid_dev->epthru_pool_handle = dma_pool_create("megaraid mbox pthru",
1176                         &adapter->pdev->dev, sizeof(mraid_epassthru_t), 128, 0);
1177
1178         if (raid_dev->epthru_pool_handle == NULL) {
1179                 goto fail_setup_dma_pool;
1180         }
1181
1182         epthru_pci_blk = raid_dev->epthru_pool;
1183         for (i = 0; i < MBOX_MAX_SCSI_CMDS; i++) {
1184                 epthru_pci_blk[i].vaddr = dma_pool_alloc(
1185                                                 raid_dev->epthru_pool_handle,
1186                                                 GFP_KERNEL,
1187                                                 &epthru_pci_blk[i].dma_addr);
1188                 if (!epthru_pci_blk[i].vaddr) {
1189                         goto fail_setup_dma_pool;
1190                 }
1191         }
1192
1193
1194         // Allocate memory for each scatter-gather list. Request for 512 bytes
1195         // alignment for each sg list
1196         raid_dev->sg_pool_handle = dma_pool_create("megaraid mbox sg",
1197                                         &adapter->pdev->dev,
1198                                         sizeof(mbox_sgl64) * MBOX_MAX_SG_SIZE,
1199                                         512, 0);
1200
1201         if (raid_dev->sg_pool_handle == NULL) {
1202                 goto fail_setup_dma_pool;
1203         }
1204
1205         sg_pci_blk = raid_dev->sg_pool;
1206         for (i = 0; i < MBOX_MAX_SCSI_CMDS; i++) {
1207                 sg_pci_blk[i].vaddr = dma_pool_alloc(
1208                                                 raid_dev->sg_pool_handle,
1209                                                 GFP_KERNEL,
1210                                                 &sg_pci_blk[i].dma_addr);
1211                 if (!sg_pci_blk[i].vaddr) {
1212                         goto fail_setup_dma_pool;
1213                 }
1214         }
1215
1216         return 0;
1217
1218 fail_setup_dma_pool:
1219         megaraid_mbox_teardown_dma_pools(adapter);
1220         return -1;
1221 }
1222
1223
1224 /**
1225  * megaraid_mbox_teardown_dma_pools - teardown dma pools for command packets
1226  * @adapter             : HBA soft state
1227  *
1228  * Teardown the dma pool for mailbox, passthru and extended passthru
1229  * structures, and scatter-gather lists.
1230  */
1231 static void
1232 megaraid_mbox_teardown_dma_pools(adapter_t *adapter)
1233 {
1234         mraid_device_t          *raid_dev = ADAP2RAIDDEV(adapter);
1235         struct mraid_pci_blk    *epthru_pci_blk;
1236         struct mraid_pci_blk    *sg_pci_blk;
1237         struct mraid_pci_blk    *mbox_pci_blk;
1238         int                     i;
1239
1240
1241         sg_pci_blk = raid_dev->sg_pool;
1242         for (i = 0; i < MBOX_MAX_SCSI_CMDS && sg_pci_blk[i].vaddr; i++) {
1243                 dma_pool_free(raid_dev->sg_pool_handle, sg_pci_blk[i].vaddr,
1244                         sg_pci_blk[i].dma_addr);
1245         }
1246         if (raid_dev->sg_pool_handle)
1247                 dma_pool_destroy(raid_dev->sg_pool_handle);
1248
1249
1250         epthru_pci_blk = raid_dev->epthru_pool;
1251         for (i = 0; i < MBOX_MAX_SCSI_CMDS && epthru_pci_blk[i].vaddr; i++) {
1252                 dma_pool_free(raid_dev->epthru_pool_handle,
1253                         epthru_pci_blk[i].vaddr, epthru_pci_blk[i].dma_addr);
1254         }
1255         if (raid_dev->epthru_pool_handle)
1256                 dma_pool_destroy(raid_dev->epthru_pool_handle);
1257
1258
1259         mbox_pci_blk = raid_dev->mbox_pool;
1260         for (i = 0; i < MBOX_MAX_SCSI_CMDS && mbox_pci_blk[i].vaddr; i++) {
1261                 dma_pool_free(raid_dev->mbox_pool_handle,
1262                         mbox_pci_blk[i].vaddr, mbox_pci_blk[i].dma_addr);
1263         }
1264         if (raid_dev->mbox_pool_handle)
1265                 dma_pool_destroy(raid_dev->mbox_pool_handle);
1266
1267         return;
1268 }
1269
1270
1271 /**
1272  * megaraid_alloc_scb - detach and return a scb from the free list
1273  * @adapter     : controller's soft state
1274  * @scp         : pointer to the scsi command to be executed
1275  *
1276  * Return the scb from the head of the free list. %NULL if there are none
1277  * available.
1278  */
1279 static scb_t *
1280 megaraid_alloc_scb(adapter_t *adapter, struct scsi_cmnd *scp)
1281 {
1282         struct list_head        *head = &adapter->kscb_pool;
1283         scb_t                   *scb = NULL;
1284         unsigned long           flags;
1285
1286         // detach scb from free pool
1287         spin_lock_irqsave(SCSI_FREE_LIST_LOCK(adapter), flags);
1288
1289         if (list_empty(head)) {
1290                 spin_unlock_irqrestore(SCSI_FREE_LIST_LOCK(adapter), flags);
1291                 return NULL;
1292         }
1293
1294         scb = list_entry(head->next, scb_t, list);
1295         list_del_init(&scb->list);
1296
1297         spin_unlock_irqrestore(SCSI_FREE_LIST_LOCK(adapter), flags);
1298
1299         scb->state      = SCB_ACTIVE;
1300         scb->scp        = scp;
1301         scb->dma_type   = MRAID_DMA_NONE;
1302
1303         return scb;
1304 }
1305
1306
1307 /**
1308  * megaraid_dealloc_scb - return the scb to the free pool
1309  * @adapter     : controller's soft state
1310  * @scb         : scb to be freed
1311  *
1312  * Return the scb back to the free list of scbs. The caller must 'flush' the
1313  * SCB before calling us. E.g., performing pci_unamp and/or pci_sync etc.
1314  * NOTE NOTE: Make sure the scb is not on any list before calling this
1315  * routine.
1316  */
1317 static inline void
1318 megaraid_dealloc_scb(adapter_t *adapter, scb_t *scb)
1319 {
1320         unsigned long           flags;
1321
1322         // put scb in the free pool
1323         scb->state      = SCB_FREE;
1324         scb->scp        = NULL;
1325         spin_lock_irqsave(SCSI_FREE_LIST_LOCK(adapter), flags);
1326
1327         list_add(&scb->list, &adapter->kscb_pool);
1328
1329         spin_unlock_irqrestore(SCSI_FREE_LIST_LOCK(adapter), flags);
1330
1331         return;
1332 }
1333
1334
1335 /**
1336  * megaraid_mbox_mksgl - make the scatter-gather list
1337  * @adapter     : controller's soft state
1338  * @scb         : scsi control block
1339  *
1340  * Prepare the scatter-gather list.
1341  */
1342 static int
1343 megaraid_mbox_mksgl(adapter_t *adapter, scb_t *scb)
1344 {
1345         struct scatterlist      *sgl;
1346         mbox_ccb_t              *ccb;
1347         struct scsi_cmnd        *scp;
1348         int                     sgcnt;
1349         int                     i;
1350
1351
1352         scp     = scb->scp;
1353         ccb     = (mbox_ccb_t *)scb->ccb;
1354
1355         sgcnt = scsi_dma_map(scp);
1356         BUG_ON(sgcnt < 0 || sgcnt > adapter->sglen);
1357
1358         // no mapping required if no data to be transferred
1359         if (!sgcnt)
1360                 return 0;
1361
1362         scb->dma_type = MRAID_DMA_WSG;
1363
1364         scsi_for_each_sg(scp, sgl, sgcnt, i) {
1365                 ccb->sgl64[i].address   = sg_dma_address(sgl);
1366                 ccb->sgl64[i].length    = sg_dma_len(sgl);
1367         }
1368
1369         // Return count of SG nodes
1370         return sgcnt;
1371 }
1372
1373
1374 /**
1375  * mbox_post_cmd - issue a mailbox command
1376  * @adapter     : controller's soft state
1377  * @scb         : command to be issued
1378  *
1379  * Post the command to the controller if mailbox is available.
1380  */
1381 static int
1382 mbox_post_cmd(adapter_t *adapter, scb_t *scb)
1383 {
1384         mraid_device_t  *raid_dev = ADAP2RAIDDEV(adapter);
1385         mbox64_t        *mbox64;
1386         mbox_t          *mbox;
1387         mbox_ccb_t      *ccb;
1388         unsigned long   flags;
1389         unsigned int    i = 0;
1390
1391
1392         ccb     = (mbox_ccb_t *)scb->ccb;
1393         mbox    = raid_dev->mbox;
1394         mbox64  = raid_dev->mbox64;
1395
1396         /*
1397          * Check for busy mailbox. If it is, return failure - the caller
1398          * should retry later.
1399          */
1400         spin_lock_irqsave(MAILBOX_LOCK(raid_dev), flags);
1401
1402         if (unlikely(mbox->busy)) {
1403                 do {
1404                         udelay(1);
1405                         i++;
1406                         rmb();
1407                 } while(mbox->busy && (i < max_mbox_busy_wait));
1408
1409                 if (mbox->busy) {
1410
1411                         spin_unlock_irqrestore(MAILBOX_LOCK(raid_dev), flags);
1412
1413                         return -1;
1414                 }
1415         }
1416
1417
1418         // Copy this command's mailbox data into "adapter's" mailbox
1419         memcpy((caddr_t)mbox64, (caddr_t)ccb->mbox64, 22);
1420         mbox->cmdid = scb->sno;
1421
1422         adapter->outstanding_cmds++;
1423
1424         mbox->busy      = 1;    // Set busy
1425         mbox->poll      = 0;
1426         mbox->ack       = 0;
1427         wmb();
1428
1429         WRINDOOR(raid_dev, raid_dev->mbox_dma | 0x1);
1430
1431         spin_unlock_irqrestore(MAILBOX_LOCK(raid_dev), flags);
1432
1433         return 0;
1434 }
1435
1436
1437 /**
1438  * megaraid_queue_command - generic queue entry point for all LLDs
1439  * @scp         : pointer to the scsi command to be executed
1440  * @done        : callback routine to be called after the cmd has be completed
1441  *
1442  * Queue entry point for mailbox based controllers.
1443  */
1444 static int
1445 megaraid_queue_command_lck(struct scsi_cmnd *scp, void (*done)(struct scsi_cmnd *))
1446 {
1447         adapter_t       *adapter;
1448         scb_t           *scb;
1449         int             if_busy;
1450
1451         adapter         = SCP2ADAPTER(scp);
1452         scp->scsi_done  = done;
1453         scp->result     = 0;
1454
1455         /*
1456          * Allocate and build a SCB request
1457          * if_busy flag will be set if megaraid_mbox_build_cmd() command could
1458          * not allocate scb. We will return non-zero status in that case.
1459          * NOTE: scb can be null even though certain commands completed
1460          * successfully, e.g., MODE_SENSE and TEST_UNIT_READY, it would
1461          * return 0 in that case, and we would do the callback right away.
1462          */
1463         if_busy = 0;
1464         scb = megaraid_mbox_build_cmd(adapter, scp, &if_busy);
1465         if (!scb) {     // command already completed
1466                 done(scp);
1467                 return 0;
1468         }
1469
1470         megaraid_mbox_runpendq(adapter, scb);
1471         return if_busy;
1472 }
1473
1474 static DEF_SCSI_QCMD(megaraid_queue_command)
1475
1476 /**
1477  * megaraid_mbox_build_cmd - transform the mid-layer scsi commands
1478  * @adapter     : controller's soft state
1479  * @scp         : mid-layer scsi command pointer
1480  * @busy        : set if request could not be completed because of lack of
1481  *              resources
1482  *
1483  * Transform the mid-layer scsi command to megaraid firmware lingua.
1484  * Convert the command issued by mid-layer to format understood by megaraid
1485  * firmware. We also complete certain commands without sending them to firmware.
1486  */
1487 static scb_t *
1488 megaraid_mbox_build_cmd(adapter_t *adapter, struct scsi_cmnd *scp, int *busy)
1489 {
1490         mraid_device_t          *rdev = ADAP2RAIDDEV(adapter);
1491         int                     channel;
1492         int                     target;
1493         int                     islogical;
1494         mbox_ccb_t              *ccb;
1495         mraid_passthru_t        *pthru;
1496         mbox64_t                *mbox64;
1497         mbox_t                  *mbox;
1498         scb_t                   *scb;
1499         char                    skip[] = "skipping";
1500         char                    scan[] = "scanning";
1501         char                    *ss;
1502
1503
1504         /*
1505          * Get the appropriate device map for the device this command is
1506          * intended for
1507          */
1508         MRAID_GET_DEVICE_MAP(adapter, scp, channel, target, islogical);
1509
1510         /*
1511          * Logical drive commands
1512          */
1513         if (islogical) {
1514                 switch (scp->cmnd[0]) {
1515                 case TEST_UNIT_READY:
1516                         /*
1517                          * Do we support clustering and is the support enabled
1518                          * If no, return success always
1519                          */
1520                         if (!adapter->ha) {
1521                                 scp->result = (DID_OK << 16);
1522                                 return NULL;
1523                         }
1524
1525                         if (!(scb = megaraid_alloc_scb(adapter, scp))) {
1526                                 scp->result = (DID_ERROR << 16);
1527                                 *busy = 1;
1528                                 return NULL;
1529                         }
1530
1531                         scb->dma_direction      = scp->sc_data_direction;
1532                         scb->dev_channel        = 0xFF;
1533                         scb->dev_target         = target;
1534                         ccb                     = (mbox_ccb_t *)scb->ccb;
1535
1536                         /*
1537                          * The command id will be provided by the command
1538                          * issuance routine
1539                          */
1540                         ccb->raw_mbox[0]        = CLUSTER_CMD;
1541                         ccb->raw_mbox[2]        = RESERVATION_STATUS;
1542                         ccb->raw_mbox[3]        = target;
1543
1544                         return scb;
1545
1546                 case MODE_SENSE:
1547                 {
1548                         struct scatterlist      *sgl;
1549                         caddr_t                 vaddr;
1550
1551                         sgl = scsi_sglist(scp);
1552                         if (sg_page(sgl)) {
1553                                 vaddr = (caddr_t) sg_virt(&sgl[0]);
1554
1555                                 memset(vaddr, 0, scp->cmnd[4]);
1556                         }
1557                         else {
1558                                 con_log(CL_ANN, (KERN_WARNING
1559                                                  "megaraid mailbox: invalid sg:%d\n",
1560                                                  __LINE__));
1561                         }
1562                 }
1563                 scp->result = (DID_OK << 16);
1564                 return NULL;
1565
1566                 case INQUIRY:
1567                         /*
1568                          * Display the channel scan for logical drives
1569                          * Do not display scan for a channel if already done.
1570                          */
1571                         if (!(rdev->last_disp & (1L << SCP2CHANNEL(scp)))) {
1572
1573                                 con_log(CL_ANN, (KERN_INFO
1574                                         "scsi[%d]: scanning scsi channel %d",
1575                                         adapter->host->host_no,
1576                                         SCP2CHANNEL(scp)));
1577
1578                                 con_log(CL_ANN, (
1579                                         " [virtual] for logical drives\n"));
1580
1581                                 rdev->last_disp |= (1L << SCP2CHANNEL(scp));
1582                         }
1583
1584                         if (scp->cmnd[1] & MEGA_SCSI_INQ_EVPD) {
1585                                 scp->sense_buffer[0] = 0x70;
1586                                 scp->sense_buffer[2] = ILLEGAL_REQUEST;
1587                                 scp->sense_buffer[12] = MEGA_INVALID_FIELD_IN_CDB;
1588                                 scp->result = CHECK_CONDITION << 1;
1589                                 return NULL;
1590                         }
1591
1592                         /* Fall through */
1593
1594                 case READ_CAPACITY:
1595                         /*
1596                          * Do not allow LUN > 0 for logical drives and
1597                          * requests for more than 40 logical drives
1598                          */
1599                         if (SCP2LUN(scp)) {
1600                                 scp->result = (DID_BAD_TARGET << 16);
1601                                 return NULL;
1602                         }
1603                         if ((target % 0x80) >= MAX_LOGICAL_DRIVES_40LD) {
1604                                 scp->result = (DID_BAD_TARGET << 16);
1605                                 return NULL;
1606                         }
1607
1608
1609                         /* Allocate a SCB and initialize passthru */
1610                         if (!(scb = megaraid_alloc_scb(adapter, scp))) {
1611                                 scp->result = (DID_ERROR << 16);
1612                                 *busy = 1;
1613                                 return NULL;
1614                         }
1615
1616                         ccb                     = (mbox_ccb_t *)scb->ccb;
1617                         scb->dev_channel        = 0xFF;
1618                         scb->dev_target         = target;
1619                         pthru                   = ccb->pthru;
1620                         mbox                    = ccb->mbox;
1621                         mbox64                  = ccb->mbox64;
1622
1623                         pthru->timeout          = 0;
1624                         pthru->ars              = 1;
1625                         pthru->reqsenselen      = 14;
1626                         pthru->islogical        = 1;
1627                         pthru->logdrv           = target;
1628                         pthru->cdblen           = scp->cmd_len;
1629                         memcpy(pthru->cdb, scp->cmnd, scp->cmd_len);
1630
1631                         mbox->cmd               = MBOXCMD_PASSTHRU64;
1632                         scb->dma_direction      = scp->sc_data_direction;
1633
1634                         pthru->dataxferlen      = scsi_bufflen(scp);
1635                         pthru->dataxferaddr     = ccb->sgl_dma_h;
1636                         pthru->numsge           = megaraid_mbox_mksgl(adapter,
1637                                                         scb);
1638
1639                         mbox->xferaddr          = 0xFFFFFFFF;
1640                         mbox64->xferaddr_lo     = (uint32_t )ccb->pthru_dma_h;
1641                         mbox64->xferaddr_hi     = 0;
1642
1643                         return scb;
1644
1645                 case READ_6:
1646                 case WRITE_6:
1647                 case READ_10:
1648                 case WRITE_10:
1649                 case READ_12:
1650                 case WRITE_12:
1651
1652                         /*
1653                          * Allocate a SCB and initialize mailbox
1654                          */
1655                         if (!(scb = megaraid_alloc_scb(adapter, scp))) {
1656                                 scp->result = (DID_ERROR << 16);
1657                                 *busy = 1;
1658                                 return NULL;
1659                         }
1660                         ccb                     = (mbox_ccb_t *)scb->ccb;
1661                         scb->dev_channel        = 0xFF;
1662                         scb->dev_target         = target;
1663                         mbox                    = ccb->mbox;
1664                         mbox64                  = ccb->mbox64;
1665                         mbox->logdrv            = target;
1666
1667                         /*
1668                          * A little HACK: 2nd bit is zero for all scsi read
1669                          * commands and is set for all scsi write commands
1670                          */
1671                         mbox->cmd = (scp->cmnd[0] & 0x02) ?  MBOXCMD_LWRITE64:
1672                                         MBOXCMD_LREAD64 ;
1673
1674                         /*
1675                          * 6-byte READ(0x08) or WRITE(0x0A) cdb
1676                          */
1677                         if (scp->cmd_len == 6) {
1678                                 mbox->numsectors = (uint32_t)scp->cmnd[4];
1679                                 mbox->lba =
1680                                         ((uint32_t)scp->cmnd[1] << 16)  |
1681                                         ((uint32_t)scp->cmnd[2] << 8)   |
1682                                         (uint32_t)scp->cmnd[3];
1683
1684                                 mbox->lba &= 0x1FFFFF;
1685                         }
1686
1687                         /*
1688                          * 10-byte READ(0x28) or WRITE(0x2A) cdb
1689                          */
1690                         else if (scp->cmd_len == 10) {
1691                                 mbox->numsectors =
1692                                         (uint32_t)scp->cmnd[8] |
1693                                         ((uint32_t)scp->cmnd[7] << 8);
1694                                 mbox->lba =
1695                                         ((uint32_t)scp->cmnd[2] << 24) |
1696                                         ((uint32_t)scp->cmnd[3] << 16) |
1697                                         ((uint32_t)scp->cmnd[4] << 8) |
1698                                         (uint32_t)scp->cmnd[5];
1699                         }
1700
1701                         /*
1702                          * 12-byte READ(0xA8) or WRITE(0xAA) cdb
1703                          */
1704                         else if (scp->cmd_len == 12) {
1705                                 mbox->lba =
1706                                         ((uint32_t)scp->cmnd[2] << 24) |
1707                                         ((uint32_t)scp->cmnd[3] << 16) |
1708                                         ((uint32_t)scp->cmnd[4] << 8) |
1709                                         (uint32_t)scp->cmnd[5];
1710
1711                                 mbox->numsectors =
1712                                         ((uint32_t)scp->cmnd[6] << 24) |
1713                                         ((uint32_t)scp->cmnd[7] << 16) |
1714                                         ((uint32_t)scp->cmnd[8] << 8) |
1715                                         (uint32_t)scp->cmnd[9];
1716                         }
1717                         else {
1718                                 con_log(CL_ANN, (KERN_WARNING
1719                                         "megaraid: unsupported CDB length\n"));
1720
1721                                 megaraid_dealloc_scb(adapter, scb);
1722
1723                                 scp->result = (DID_ERROR << 16);
1724                                 return NULL;
1725                         }
1726
1727                         scb->dma_direction = scp->sc_data_direction;
1728
1729                         // Calculate Scatter-Gather info
1730                         mbox64->xferaddr_lo     = (uint32_t )ccb->sgl_dma_h;
1731                         mbox->numsge            = megaraid_mbox_mksgl(adapter,
1732                                                         scb);
1733                         mbox->xferaddr          = 0xFFFFFFFF;
1734                         mbox64->xferaddr_hi     = 0;
1735
1736                         return scb;
1737
1738                 case RESERVE:
1739                 case RELEASE:
1740                         /*
1741                          * Do we support clustering and is the support enabled
1742                          */
1743                         if (!adapter->ha) {
1744                                 scp->result = (DID_BAD_TARGET << 16);
1745                                 return NULL;
1746                         }
1747
1748                         /*
1749                          * Allocate a SCB and initialize mailbox
1750                          */
1751                         if (!(scb = megaraid_alloc_scb(adapter, scp))) {
1752                                 scp->result = (DID_ERROR << 16);
1753                                 *busy = 1;
1754                                 return NULL;
1755                         }
1756
1757                         ccb                     = (mbox_ccb_t *)scb->ccb;
1758                         scb->dev_channel        = 0xFF;
1759                         scb->dev_target         = target;
1760                         ccb->raw_mbox[0]        = CLUSTER_CMD;
1761                         ccb->raw_mbox[2]        =  (scp->cmnd[0] == RESERVE) ?
1762                                                 RESERVE_LD : RELEASE_LD;
1763
1764                         ccb->raw_mbox[3]        = target;
1765                         scb->dma_direction      = scp->sc_data_direction;
1766
1767                         return scb;
1768
1769                 default:
1770                         scp->result = (DID_BAD_TARGET << 16);
1771                         return NULL;
1772                 }
1773         }
1774         else { // Passthru device commands
1775
1776                 // Do not allow access to target id > 15 or LUN > 7
1777                 if (target > 15 || SCP2LUN(scp) > 7) {
1778                         scp->result = (DID_BAD_TARGET << 16);
1779                         return NULL;
1780                 }
1781
1782                 // if fast load option was set and scan for last device is
1783                 // over, reset the fast_load flag so that during a possible
1784                 // next scan, devices can be made available
1785                 if (rdev->fast_load && (target == 15) &&
1786                         (SCP2CHANNEL(scp) == adapter->max_channel -1)) {
1787
1788                         con_log(CL_ANN, (KERN_INFO
1789                         "megaraid[%d]: physical device scan re-enabled\n",
1790                                 adapter->host->host_no));
1791                         rdev->fast_load = 0;
1792                 }
1793
1794                 /*
1795                  * Display the channel scan for physical devices
1796                  */
1797                 if (!(rdev->last_disp & (1L << SCP2CHANNEL(scp)))) {
1798
1799                         ss = rdev->fast_load ? skip : scan;
1800
1801                         con_log(CL_ANN, (KERN_INFO
1802                                 "scsi[%d]: %s scsi channel %d [Phy %d]",
1803                                 adapter->host->host_no, ss, SCP2CHANNEL(scp),
1804                                 channel));
1805
1806                         con_log(CL_ANN, (
1807                                 " for non-raid devices\n"));
1808
1809                         rdev->last_disp |= (1L << SCP2CHANNEL(scp));
1810                 }
1811
1812                 // disable channel sweep if fast load option given
1813                 if (rdev->fast_load) {
1814                         scp->result = (DID_BAD_TARGET << 16);
1815                         return NULL;
1816                 }
1817
1818                 // Allocate a SCB and initialize passthru
1819                 if (!(scb = megaraid_alloc_scb(adapter, scp))) {
1820                         scp->result = (DID_ERROR << 16);
1821                         *busy = 1;
1822                         return NULL;
1823                 }
1824
1825                 ccb                     = (mbox_ccb_t *)scb->ccb;
1826                 scb->dev_channel        = channel;
1827                 scb->dev_target         = target;
1828                 scb->dma_direction      = scp->sc_data_direction;
1829                 mbox                    = ccb->mbox;
1830                 mbox64                  = ccb->mbox64;
1831
1832                 // Does this firmware support extended CDBs
1833                 if (adapter->max_cdb_sz == 16) {
1834                         mbox->cmd               = MBOXCMD_EXTPTHRU;
1835
1836                         megaraid_mbox_prepare_epthru(adapter, scb, scp);
1837
1838                         mbox64->xferaddr_lo     = (uint32_t)ccb->epthru_dma_h;
1839                         mbox64->xferaddr_hi     = 0;
1840                         mbox->xferaddr          = 0xFFFFFFFF;
1841                 }
1842                 else {
1843                         mbox->cmd = MBOXCMD_PASSTHRU64;
1844
1845                         megaraid_mbox_prepare_pthru(adapter, scb, scp);
1846
1847                         mbox64->xferaddr_lo     = (uint32_t)ccb->pthru_dma_h;
1848                         mbox64->xferaddr_hi     = 0;
1849                         mbox->xferaddr          = 0xFFFFFFFF;
1850                 }
1851                 return scb;
1852         }
1853
1854         // NOT REACHED
1855 }
1856
1857
1858 /**
1859  * megaraid_mbox_runpendq - execute commands queued in the pending queue
1860  * @adapter     : controller's soft state
1861  * @scb_q       : SCB to be queued in the pending list
1862  *
1863  * Scan the pending list for commands which are not yet issued and try to
1864  * post to the controller. The SCB can be a null pointer, which would indicate
1865  * no SCB to be queue, just try to execute the ones in the pending list.
1866  *
1867  * NOTE: We do not actually traverse the pending list. The SCBs are plucked
1868  * out from the head of the pending list. If it is successfully issued, the
1869  * next SCB is at the head now.
1870  */
1871 static void
1872 megaraid_mbox_runpendq(adapter_t *adapter, scb_t *scb_q)
1873 {
1874         scb_t                   *scb;
1875         unsigned long           flags;
1876
1877         spin_lock_irqsave(PENDING_LIST_LOCK(adapter), flags);
1878
1879         if (scb_q) {
1880                 scb_q->state = SCB_PENDQ;
1881                 list_add_tail(&scb_q->list, &adapter->pend_list);
1882         }
1883
1884         // if the adapter in not in quiescent mode, post the commands to FW
1885         if (adapter->quiescent) {
1886                 spin_unlock_irqrestore(PENDING_LIST_LOCK(adapter), flags);
1887                 return;
1888         }
1889
1890         while (!list_empty(&adapter->pend_list)) {
1891
1892                 assert_spin_locked(PENDING_LIST_LOCK(adapter));
1893
1894                 scb = list_entry(adapter->pend_list.next, scb_t, list);
1895
1896                 // remove the scb from the pending list and try to
1897                 // issue. If we are unable to issue it, put back in
1898                 // the pending list and return
1899
1900                 list_del_init(&scb->list);
1901
1902                 spin_unlock_irqrestore(PENDING_LIST_LOCK(adapter), flags);
1903
1904                 // if mailbox was busy, return SCB back to pending
1905                 // list. Make sure to add at the head, since that's
1906                 // where it would have been removed from
1907
1908                 scb->state = SCB_ISSUED;
1909
1910                 if (mbox_post_cmd(adapter, scb) != 0) {
1911
1912                         spin_lock_irqsave(PENDING_LIST_LOCK(adapter), flags);
1913
1914                         scb->state = SCB_PENDQ;
1915
1916                         list_add(&scb->list, &adapter->pend_list);
1917
1918                         spin_unlock_irqrestore(PENDING_LIST_LOCK(adapter),
1919                                 flags);
1920
1921                         return;
1922                 }
1923
1924                 spin_lock_irqsave(PENDING_LIST_LOCK(adapter), flags);
1925         }
1926
1927         spin_unlock_irqrestore(PENDING_LIST_LOCK(adapter), flags);
1928
1929
1930         return;
1931 }
1932
1933
1934 /**
1935  * megaraid_mbox_prepare_pthru - prepare a command for physical devices
1936  * @adapter     : pointer to controller's soft state
1937  * @scb         : scsi control block
1938  * @scp         : scsi command from the mid-layer
1939  *
1940  * Prepare a command for the scsi physical devices.
1941  */
1942 static void
1943 megaraid_mbox_prepare_pthru(adapter_t *adapter, scb_t *scb,
1944                 struct scsi_cmnd *scp)
1945 {
1946         mbox_ccb_t              *ccb;
1947         mraid_passthru_t        *pthru;
1948         uint8_t                 channel;
1949         uint8_t                 target;
1950
1951         ccb     = (mbox_ccb_t *)scb->ccb;
1952         pthru   = ccb->pthru;
1953         channel = scb->dev_channel;
1954         target  = scb->dev_target;
1955
1956         // 0=6sec, 1=60sec, 2=10min, 3=3hrs, 4=NO timeout
1957         pthru->timeout          = 4;
1958         pthru->ars              = 1;
1959         pthru->islogical        = 0;
1960         pthru->channel          = 0;
1961         pthru->target           = (channel << 4) | target;
1962         pthru->logdrv           = SCP2LUN(scp);
1963         pthru->reqsenselen      = 14;
1964         pthru->cdblen           = scp->cmd_len;
1965
1966         memcpy(pthru->cdb, scp->cmnd, scp->cmd_len);
1967
1968         if (scsi_bufflen(scp)) {
1969                 pthru->dataxferlen      = scsi_bufflen(scp);
1970                 pthru->dataxferaddr     = ccb->sgl_dma_h;
1971                 pthru->numsge           = megaraid_mbox_mksgl(adapter, scb);
1972         }
1973         else {
1974                 pthru->dataxferaddr     = 0;
1975                 pthru->dataxferlen      = 0;
1976                 pthru->numsge           = 0;
1977         }
1978         return;
1979 }
1980
1981
1982 /**
1983  * megaraid_mbox_prepare_epthru - prepare a command for physical devices
1984  * @adapter     : pointer to controller's soft state
1985  * @scb         : scsi control block
1986  * @scp         : scsi command from the mid-layer
1987  *
1988  * Prepare a command for the scsi physical devices. This routine prepares
1989  * commands for devices which can take extended CDBs (>10 bytes).
1990  */
1991 static void
1992 megaraid_mbox_prepare_epthru(adapter_t *adapter, scb_t *scb,
1993                 struct scsi_cmnd *scp)
1994 {
1995         mbox_ccb_t              *ccb;
1996         mraid_epassthru_t       *epthru;
1997         uint8_t                 channel;
1998         uint8_t                 target;
1999
2000         ccb     = (mbox_ccb_t *)scb->ccb;
2001         epthru  = ccb->epthru;
2002         channel = scb->dev_channel;
2003         target  = scb->dev_target;
2004
2005         // 0=6sec, 1=60sec, 2=10min, 3=3hrs, 4=NO timeout
2006         epthru->timeout         = 4;
2007         epthru->ars             = 1;
2008         epthru->islogical       = 0;
2009         epthru->channel         = 0;
2010         epthru->target          = (channel << 4) | target;
2011         epthru->logdrv          = SCP2LUN(scp);
2012         epthru->reqsenselen     = 14;
2013         epthru->cdblen          = scp->cmd_len;
2014
2015         memcpy(epthru->cdb, scp->cmnd, scp->cmd_len);
2016
2017         if (scsi_bufflen(scp)) {
2018                 epthru->dataxferlen     = scsi_bufflen(scp);
2019                 epthru->dataxferaddr    = ccb->sgl_dma_h;
2020                 epthru->numsge          = megaraid_mbox_mksgl(adapter, scb);
2021         }
2022         else {
2023                 epthru->dataxferaddr    = 0;
2024                 epthru->dataxferlen     = 0;
2025                 epthru->numsge          = 0;
2026         }
2027         return;
2028 }
2029
2030
2031 /**
2032  * megaraid_ack_sequence - interrupt ack sequence for memory mapped HBAs
2033  * @adapter     : controller's soft state
2034  *
2035  * Interrupt acknowledgement sequence for memory mapped HBAs. Find out the
2036  * completed command and put them on the completed list for later processing.
2037  *
2038  * Returns:     1 if the interrupt is valid, 0 otherwise
2039  */
2040 static int
2041 megaraid_ack_sequence(adapter_t *adapter)
2042 {
2043         mraid_device_t          *raid_dev = ADAP2RAIDDEV(adapter);
2044         mbox_t                  *mbox;
2045         scb_t                   *scb;
2046         uint8_t                 nstatus;
2047         uint8_t                 completed[MBOX_MAX_FIRMWARE_STATUS];
2048         struct list_head        clist;
2049         int                     handled;
2050         uint32_t                dword;
2051         unsigned long           flags;
2052         int                     i, j;
2053
2054
2055         mbox    = raid_dev->mbox;
2056
2057         // move the SCBs from the firmware completed array to our local list
2058         INIT_LIST_HEAD(&clist);
2059
2060         // loop till F/W has more commands for us to complete
2061         handled = 0;
2062         spin_lock_irqsave(MAILBOX_LOCK(raid_dev), flags);
2063         do {
2064                 /*
2065                  * Check if a valid interrupt is pending. If found, force the
2066                  * interrupt line low.
2067                  */
2068                 dword = RDOUTDOOR(raid_dev);
2069                 if (dword != 0x10001234) break;
2070
2071                 handled = 1;
2072
2073                 WROUTDOOR(raid_dev, 0x10001234);
2074
2075                 nstatus = 0;
2076                 // wait for valid numstatus to post
2077                 for (i = 0; i < 0xFFFFF; i++) {
2078                         if (mbox->numstatus != 0xFF) {
2079                                 nstatus = mbox->numstatus;
2080                                 break;
2081                         }
2082                         rmb();
2083                 }
2084                 mbox->numstatus = 0xFF;
2085
2086                 adapter->outstanding_cmds -= nstatus;
2087
2088                 for (i = 0; i < nstatus; i++) {
2089
2090                         // wait for valid command index to post
2091                         for (j = 0; j < 0xFFFFF; j++) {
2092                                 if (mbox->completed[i] != 0xFF) break;
2093                                 rmb();
2094                         }
2095                         completed[i]            = mbox->completed[i];
2096                         mbox->completed[i]      = 0xFF;
2097
2098                         if (completed[i] == 0xFF) {
2099                                 con_log(CL_ANN, (KERN_CRIT
2100                                 "megaraid: command posting timed out\n"));
2101
2102                                 BUG();
2103                                 continue;
2104                         }
2105
2106                         // Get SCB associated with this command id
2107                         if (completed[i] >= MBOX_MAX_SCSI_CMDS) {
2108                                 // a cmm command
2109                                 scb = adapter->uscb_list + (completed[i] -
2110                                                 MBOX_MAX_SCSI_CMDS);
2111                         }
2112                         else {
2113                                 // an os command
2114                                 scb = adapter->kscb_list + completed[i];
2115                         }
2116
2117                         scb->status = mbox->status;
2118                         list_add_tail(&scb->list, &clist);
2119                 }
2120
2121                 // Acknowledge interrupt
2122                 WRINDOOR(raid_dev, 0x02);
2123
2124         } while(1);
2125
2126         spin_unlock_irqrestore(MAILBOX_LOCK(raid_dev), flags);
2127
2128
2129         // put the completed commands in the completed list. DPC would
2130         // complete these commands later
2131         spin_lock_irqsave(COMPLETED_LIST_LOCK(adapter), flags);
2132
2133         list_splice(&clist, &adapter->completed_list);
2134
2135         spin_unlock_irqrestore(COMPLETED_LIST_LOCK(adapter), flags);
2136
2137
2138         // schedule the DPC if there is some work for it
2139         if (handled)
2140                 tasklet_schedule(&adapter->dpc_h);
2141
2142         return handled;
2143 }
2144
2145
2146 /**
2147  * megaraid_isr - isr for memory based mailbox based controllers
2148  * @irq         : irq
2149  * @devp        : pointer to our soft state
2150  *
2151  * Interrupt service routine for memory-mapped mailbox controllers.
2152  */
2153 static irqreturn_t
2154 megaraid_isr(int irq, void *devp)
2155 {
2156         adapter_t       *adapter = devp;
2157         int             handled;
2158
2159         handled = megaraid_ack_sequence(adapter);
2160
2161         /* Loop through any pending requests */
2162         if (!adapter->quiescent) {
2163                 megaraid_mbox_runpendq(adapter, NULL);
2164         }
2165
2166         return IRQ_RETVAL(handled);
2167 }
2168
2169
2170 /**
2171  * megaraid_mbox_dpc - the tasklet to complete the commands from completed list
2172  * @devp        : pointer to HBA soft state
2173  *
2174  * Pick up the commands from the completed list and send back to the owners.
2175  * This is a reentrant function and does not assume any locks are held while
2176  * it is being called.
2177  */
2178 static void
2179 megaraid_mbox_dpc(unsigned long devp)
2180 {
2181         adapter_t               *adapter = (adapter_t *)devp;
2182         mraid_device_t          *raid_dev;
2183         struct list_head        clist;
2184         struct scatterlist      *sgl;
2185         scb_t                   *scb;
2186         scb_t                   *tmp;
2187         struct scsi_cmnd        *scp;
2188         mraid_passthru_t        *pthru;
2189         mraid_epassthru_t       *epthru;
2190         mbox_ccb_t              *ccb;
2191         int                     islogical;
2192         int                     pdev_index;
2193         int                     pdev_state;
2194         mbox_t                  *mbox;
2195         unsigned long           flags;
2196         uint8_t                 c;
2197         int                     status;
2198         uioc_t                  *kioc;
2199
2200
2201         if (!adapter) return;
2202
2203         raid_dev = ADAP2RAIDDEV(adapter);
2204
2205         // move the SCBs from the completed list to our local list
2206         INIT_LIST_HEAD(&clist);
2207
2208         spin_lock_irqsave(COMPLETED_LIST_LOCK(adapter), flags);
2209
2210         list_splice_init(&adapter->completed_list, &clist);
2211
2212         spin_unlock_irqrestore(COMPLETED_LIST_LOCK(adapter), flags);
2213
2214
2215         list_for_each_entry_safe(scb, tmp, &clist, list) {
2216
2217                 status          = scb->status;
2218                 scp             = scb->scp;
2219                 ccb             = (mbox_ccb_t *)scb->ccb;
2220                 pthru           = ccb->pthru;
2221                 epthru          = ccb->epthru;
2222                 mbox            = ccb->mbox;
2223
2224                 // Make sure f/w has completed a valid command
2225                 if (scb->state != SCB_ISSUED) {
2226                         con_log(CL_ANN, (KERN_CRIT
2227                         "megaraid critical err: invalid command %d:%d:%p\n",
2228                                 scb->sno, scb->state, scp));
2229                         BUG();
2230                         continue;       // Must never happen!
2231                 }
2232
2233                 // check for the management command and complete it right away
2234                 if (scb->sno >= MBOX_MAX_SCSI_CMDS) {
2235                         scb->state      = SCB_FREE;
2236                         scb->status     = status;
2237
2238                         // remove from local clist
2239                         list_del_init(&scb->list);
2240
2241                         kioc                    = (uioc_t *)scb->gp;
2242                         kioc->status            = 0;
2243
2244                         megaraid_mbox_mm_done(adapter, scb);
2245
2246                         continue;
2247                 }
2248
2249                 // Was an abort issued for this command earlier
2250                 if (scb->state & SCB_ABORT) {
2251                         con_log(CL_ANN, (KERN_NOTICE
2252                         "megaraid: aborted cmd [%x] completed\n",
2253                                 scb->sno));
2254                 }
2255
2256                 /*
2257                  * If the inquiry came of a disk drive which is not part of
2258                  * any RAID array, expose it to the kernel. For this to be
2259                  * enabled, user must set the "megaraid_expose_unconf_disks"
2260                  * flag to 1 by specifying it on module parameter list.
2261                  * This would enable data migration off drives from other
2262                  * configurations.
2263                  */
2264                 islogical = MRAID_IS_LOGICAL(adapter, scp);
2265                 if (scp->cmnd[0] == INQUIRY && status == 0 && islogical == 0
2266                                 && IS_RAID_CH(raid_dev, scb->dev_channel)) {
2267
2268                         sgl = scsi_sglist(scp);
2269                         if (sg_page(sgl)) {
2270                                 c = *(unsigned char *) sg_virt(&sgl[0]);
2271                         } else {
2272                                 con_log(CL_ANN, (KERN_WARNING
2273                                                  "megaraid mailbox: invalid sg:%d\n",
2274                                                  __LINE__));
2275                                 c = 0;
2276                         }
2277
2278                         if ((c & 0x1F ) == TYPE_DISK) {
2279                                 pdev_index = (scb->dev_channel * 16) +
2280                                         scb->dev_target;
2281                                 pdev_state =
2282                                         raid_dev->pdrv_state[pdev_index] & 0x0F;
2283
2284                                 if (pdev_state == PDRV_ONLINE           ||
2285                                         pdev_state == PDRV_FAILED       ||
2286                                         pdev_state == PDRV_RBLD         ||
2287                                         pdev_state == PDRV_HOTSPARE     ||
2288                                         megaraid_expose_unconf_disks == 0) {
2289
2290                                         status = 0xF0;
2291                                 }
2292                         }
2293                 }
2294
2295                 // Convert MegaRAID status to Linux error code
2296                 switch (status) {
2297
2298                 case 0x00:
2299
2300                         scp->result = (DID_OK << 16);
2301                         break;
2302
2303                 case 0x02:
2304
2305                         /* set sense_buffer and result fields */
2306                         if (mbox->cmd == MBOXCMD_PASSTHRU ||
2307                                 mbox->cmd == MBOXCMD_PASSTHRU64) {
2308
2309                                 memcpy(scp->sense_buffer, pthru->reqsensearea,
2310                                                 14);
2311
2312                                 scp->result = DRIVER_SENSE << 24 |
2313                                         DID_OK << 16 | CHECK_CONDITION << 1;
2314                         }
2315                         else {
2316                                 if (mbox->cmd == MBOXCMD_EXTPTHRU) {
2317
2318                                         memcpy(scp->sense_buffer,
2319                                                 epthru->reqsensearea, 14);
2320
2321                                         scp->result = DRIVER_SENSE << 24 |
2322                                                 DID_OK << 16 |
2323                                                 CHECK_CONDITION << 1;
2324                                 } else {
2325                                         scp->sense_buffer[0] = 0x70;
2326                                         scp->sense_buffer[2] = ABORTED_COMMAND;
2327                                         scp->result = CHECK_CONDITION << 1;
2328                                 }
2329                         }
2330                         break;
2331
2332                 case 0x08:
2333
2334                         scp->result = DID_BUS_BUSY << 16 | status;
2335                         break;
2336
2337                 default:
2338
2339                         /*
2340                          * If TEST_UNIT_READY fails, we know RESERVATION_STATUS
2341                          * failed
2342                          */
2343                         if (scp->cmnd[0] == TEST_UNIT_READY) {
2344                                 scp->result = DID_ERROR << 16 |
2345                                         RESERVATION_CONFLICT << 1;
2346                         }
2347                         else
2348                         /*
2349                          * Error code returned is 1 if Reserve or Release
2350                          * failed or the input parameter is invalid
2351                          */
2352                         if (status == 1 && (scp->cmnd[0] == RESERVE ||
2353                                          scp->cmnd[0] == RELEASE)) {
2354
2355                                 scp->result = DID_ERROR << 16 |
2356                                         RESERVATION_CONFLICT << 1;
2357                         }
2358                         else {
2359                                 scp->result = DID_BAD_TARGET << 16 | status;
2360                         }
2361                 }
2362
2363                 // print a debug message for all failed commands
2364                 if (status) {
2365                         megaraid_mbox_display_scb(adapter, scb);
2366                 }
2367
2368                 scsi_dma_unmap(scp);
2369
2370                 // remove from local clist
2371                 list_del_init(&scb->list);
2372
2373                 // put back in free list
2374                 megaraid_dealloc_scb(adapter, scb);
2375
2376                 // send the scsi packet back to kernel
2377                 scp->scsi_done(scp);
2378         }
2379
2380         return;
2381 }
2382
2383
2384 /**
2385  * megaraid_abort_handler - abort the scsi command
2386  * @scp         : command to be aborted
2387  *
2388  * Abort a previous SCSI request. Only commands on the pending list can be
2389  * aborted. All the commands issued to the F/W must complete.
2390  **/
2391 static int
2392 megaraid_abort_handler(struct scsi_cmnd *scp)
2393 {
2394         adapter_t               *adapter;
2395         mraid_device_t          *raid_dev;
2396         scb_t                   *scb;
2397         scb_t                   *tmp;
2398         int                     found;
2399         unsigned long           flags;
2400         int                     i;
2401
2402
2403         adapter         = SCP2ADAPTER(scp);
2404         raid_dev        = ADAP2RAIDDEV(adapter);
2405
2406         con_log(CL_ANN, (KERN_WARNING
2407                 "megaraid: aborting cmd=%x <c=%d t=%d l=%d>\n",
2408                 scp->cmnd[0], SCP2CHANNEL(scp),
2409                 SCP2TARGET(scp), SCP2LUN(scp)));
2410
2411         // If FW has stopped responding, simply return failure
2412         if (raid_dev->hw_error) {
2413                 con_log(CL_ANN, (KERN_NOTICE
2414                         "megaraid: hw error, not aborting\n"));
2415                 return FAILED;
2416         }
2417
2418         // There might a race here, where the command was completed by the
2419         // firmware and now it is on the completed list. Before we could
2420         // complete the command to the kernel in dpc, the abort came.
2421         // Find out if this is the case to avoid the race.
2422         scb = NULL;
2423         spin_lock_irqsave(COMPLETED_LIST_LOCK(adapter), flags);
2424         list_for_each_entry_safe(scb, tmp, &adapter->completed_list, list) {
2425
2426                 if (scb->scp == scp) {  // Found command
2427
2428                         list_del_init(&scb->list);      // from completed list
2429
2430                         con_log(CL_ANN, (KERN_WARNING
2431                         "megaraid: %d[%d:%d], abort from completed list\n",
2432                                 scb->sno, scb->dev_channel, scb->dev_target));
2433
2434                         scp->result = (DID_ABORT << 16);
2435                         scp->scsi_done(scp);
2436
2437                         megaraid_dealloc_scb(adapter, scb);
2438
2439                         spin_unlock_irqrestore(COMPLETED_LIST_LOCK(adapter),
2440                                 flags);
2441
2442                         return SUCCESS;
2443                 }
2444         }
2445         spin_unlock_irqrestore(COMPLETED_LIST_LOCK(adapter), flags);
2446
2447
2448         // Find out if this command is still on the pending list. If it is and
2449         // was never issued, abort and return success. If the command is owned
2450         // by the firmware, we must wait for it to complete by the FW.
2451         spin_lock_irqsave(PENDING_LIST_LOCK(adapter), flags);
2452         list_for_each_entry_safe(scb, tmp, &adapter->pend_list, list) {
2453
2454                 if (scb->scp == scp) {  // Found command
2455
2456                         list_del_init(&scb->list);      // from pending list
2457
2458                         ASSERT(!(scb->state & SCB_ISSUED));
2459
2460                         con_log(CL_ANN, (KERN_WARNING
2461                                 "megaraid abort: [%d:%d], driver owner\n",
2462                                 scb->dev_channel, scb->dev_target));
2463
2464                         scp->result = (DID_ABORT << 16);
2465                         scp->scsi_done(scp);
2466
2467                         megaraid_dealloc_scb(adapter, scb);
2468
2469                         spin_unlock_irqrestore(PENDING_LIST_LOCK(adapter),
2470                                 flags);
2471
2472                         return SUCCESS;
2473                 }
2474         }
2475         spin_unlock_irqrestore(PENDING_LIST_LOCK(adapter), flags);
2476
2477
2478         // Check do we even own this command, in which case this would be
2479         // owned by the firmware. The only way to locate the FW scb is to
2480         // traverse through the list of all SCB, since driver does not
2481         // maintain these SCBs on any list
2482         found = 0;
2483         spin_lock_irq(&adapter->lock);
2484         for (i = 0; i < MBOX_MAX_SCSI_CMDS; i++) {
2485                 scb = adapter->kscb_list + i;
2486
2487                 if (scb->scp == scp) {
2488
2489                         found = 1;
2490
2491                         if (!(scb->state & SCB_ISSUED)) {
2492                                 con_log(CL_ANN, (KERN_WARNING
2493                                 "megaraid abort: %d[%d:%d], invalid state\n",
2494                                 scb->sno, scb->dev_channel, scb->dev_target));
2495                                 BUG();
2496                         }
2497                         else {
2498                                 con_log(CL_ANN, (KERN_WARNING
2499                                 "megaraid abort: %d[%d:%d], fw owner\n",
2500                                 scb->sno, scb->dev_channel, scb->dev_target));
2501                         }
2502                 }
2503         }
2504         spin_unlock_irq(&adapter->lock);
2505
2506         if (!found) {
2507                 con_log(CL_ANN, (KERN_WARNING "megaraid abort: do now own\n"));
2508
2509                 // FIXME: Should there be a callback for this command?
2510                 return SUCCESS;
2511         }
2512
2513         // We cannot actually abort a command owned by firmware, return
2514         // failure and wait for reset. In host reset handler, we will find out
2515         // if the HBA is still live
2516         return FAILED;
2517 }
2518
2519 /**
2520  * megaraid_reset_handler - device reset handler for mailbox based driver
2521  * @scp         : reference command
2522  *
2523  * Reset handler for the mailbox based controller. First try to find out if
2524  * the FW is still live, in which case the outstanding commands counter mut go
2525  * down to 0. If that happens, also issue the reservation reset command to
2526  * relinquish (possible) reservations on the logical drives connected to this
2527  * host.
2528  **/
2529 static int
2530 megaraid_reset_handler(struct scsi_cmnd *scp)
2531 {
2532         adapter_t       *adapter;
2533         scb_t           *scb;
2534         scb_t           *tmp;
2535         mraid_device_t  *raid_dev;
2536         unsigned long   flags;
2537         uint8_t         raw_mbox[sizeof(mbox_t)];
2538         int             rval;
2539         int             recovery_window;
2540         int             i;
2541         uioc_t          *kioc;
2542
2543         adapter         = SCP2ADAPTER(scp);
2544         raid_dev        = ADAP2RAIDDEV(adapter);
2545
2546         // return failure if adapter is not responding
2547         if (raid_dev->hw_error) {
2548                 con_log(CL_ANN, (KERN_NOTICE
2549                         "megaraid: hw error, cannot reset\n"));
2550                 return FAILED;
2551         }
2552
2553         // Under exceptional conditions, FW can take up to 3 minutes to
2554         // complete command processing. Wait for additional 2 minutes for the
2555         // pending commands counter to go down to 0. If it doesn't, let the
2556         // controller be marked offline
2557         // Also, reset all the commands currently owned by the driver
2558         spin_lock_irqsave(PENDING_LIST_LOCK(adapter), flags);
2559         list_for_each_entry_safe(scb, tmp, &adapter->pend_list, list) {
2560                 list_del_init(&scb->list);      // from pending list
2561
2562                 if (scb->sno >= MBOX_MAX_SCSI_CMDS) {
2563                         con_log(CL_ANN, (KERN_WARNING
2564                         "megaraid: IOCTL packet with %d[%d:%d] being reset\n",
2565                         scb->sno, scb->dev_channel, scb->dev_target));
2566
2567                         scb->status = -1;
2568
2569                         kioc                    = (uioc_t *)scb->gp;
2570                         kioc->status            = -EFAULT;
2571
2572                         megaraid_mbox_mm_done(adapter, scb);
2573                 } else {
2574                         if (scb->scp == scp) {  // Found command
2575                                 con_log(CL_ANN, (KERN_WARNING
2576                                         "megaraid: %d[%d:%d], reset from pending list\n",
2577                                         scb->sno, scb->dev_channel, scb->dev_target));
2578                         } else {
2579                                 con_log(CL_ANN, (KERN_WARNING
2580                                 "megaraid: IO packet with %d[%d:%d] being reset\n",
2581                                 scb->sno, scb->dev_channel, scb->dev_target));
2582                         }
2583
2584                         scb->scp->result = (DID_RESET << 16);
2585                         scb->scp->scsi_done(scb->scp);
2586
2587                         megaraid_dealloc_scb(adapter, scb);
2588                 }
2589         }
2590         spin_unlock_irqrestore(PENDING_LIST_LOCK(adapter), flags);
2591
2592         if (adapter->outstanding_cmds) {
2593                 con_log(CL_ANN, (KERN_NOTICE
2594                         "megaraid: %d outstanding commands. Max wait %d sec\n",
2595                         adapter->outstanding_cmds,
2596                         (MBOX_RESET_WAIT + MBOX_RESET_EXT_WAIT)));
2597         }
2598
2599         recovery_window = MBOX_RESET_WAIT + MBOX_RESET_EXT_WAIT;
2600
2601         for (i = 0; i < recovery_window; i++) {
2602
2603                 megaraid_ack_sequence(adapter);
2604
2605                 // print a message once every 5 seconds only
2606                 if (!(i % 5)) {
2607                         con_log(CL_ANN, (
2608                         "megaraid mbox: Wait for %d commands to complete:%d\n",
2609                                 adapter->outstanding_cmds,
2610                                 (MBOX_RESET_WAIT + MBOX_RESET_EXT_WAIT) - i));
2611                 }
2612
2613                 // bailout if no recovery happened in reset time
2614                 if (adapter->outstanding_cmds == 0) {
2615                         break;
2616                 }
2617
2618                 msleep(1000);
2619         }
2620
2621         spin_lock(&adapter->lock);
2622
2623         // If still outstanding commands, bail out
2624         if (adapter->outstanding_cmds) {
2625                 con_log(CL_ANN, (KERN_WARNING
2626                         "megaraid mbox: critical hardware error!\n"));
2627
2628                 raid_dev->hw_error = 1;
2629
2630                 rval = FAILED;
2631                 goto out;
2632         }
2633         else {
2634                 con_log(CL_ANN, (KERN_NOTICE
2635                 "megaraid mbox: reset sequence completed successfully\n"));
2636         }
2637
2638
2639         // If the controller supports clustering, reset reservations
2640         if (!adapter->ha) {
2641                 rval = SUCCESS;
2642                 goto out;
2643         }
2644
2645         // clear reservations if any
2646         raw_mbox[0] = CLUSTER_CMD;
2647         raw_mbox[2] = RESET_RESERVATIONS;
2648
2649         rval = SUCCESS;
2650         if (mbox_post_sync_cmd_fast(adapter, raw_mbox) == 0) {
2651                 con_log(CL_ANN,
2652                         (KERN_INFO "megaraid: reservation reset\n"));
2653         }
2654         else {
2655                 rval = FAILED;
2656                 con_log(CL_ANN, (KERN_WARNING
2657                                 "megaraid: reservation reset failed\n"));
2658         }
2659
2660  out:
2661         spin_unlock(&adapter->lock);
2662         return rval;
2663 }
2664
2665 /*
2666  * START: internal commands library
2667  *
2668  * This section of the driver has the common routine used by the driver and
2669  * also has all the FW routines
2670  */
2671
2672 /**
2673  * mbox_post_sync_cmd() - blocking command to the mailbox based controllers
2674  * @adapter     : controller's soft state
2675  * @raw_mbox    : the mailbox
2676  *
2677  * Issue a scb in synchronous and non-interrupt mode for mailbox based
2678  * controllers.
2679  */
2680 static int
2681 mbox_post_sync_cmd(adapter_t *adapter, uint8_t raw_mbox[])
2682 {
2683         mraid_device_t  *raid_dev = ADAP2RAIDDEV(adapter);
2684         mbox_t          *mbox;
2685         uint8_t         status;
2686         int             i;
2687
2688         mbox    = raid_dev->mbox;
2689
2690         /*
2691          * Wait until mailbox is free
2692          */
2693         if (megaraid_busywait_mbox(raid_dev) != 0)
2694                 goto blocked_mailbox;
2695
2696         /*
2697          * Copy mailbox data into host structure
2698          */
2699         memcpy((caddr_t)mbox, (caddr_t)raw_mbox, 16);
2700         mbox->cmdid             = 0xFE;
2701         mbox->busy              = 1;
2702         mbox->poll              = 0;
2703         mbox->ack               = 0;
2704         mbox->numstatus         = 0xFF;
2705         mbox->status            = 0xFF;
2706
2707         wmb();
2708         WRINDOOR(raid_dev, raid_dev->mbox_dma | 0x1);
2709
2710         // wait for maximum 1 second for status to post. If the status is not
2711         // available within 1 second, assume FW is initializing and wait
2712         // for an extended amount of time
2713         if (mbox->numstatus == 0xFF) {  // status not yet available
2714                 udelay(25);
2715
2716                 for (i = 0; mbox->numstatus == 0xFF && i < 1000; i++) {
2717                         rmb();
2718                         msleep(1);
2719                 }
2720
2721
2722                 if (i == 1000) {
2723                         con_log(CL_ANN, (KERN_NOTICE
2724                                 "megaraid mailbox: wait for FW to boot      "));
2725
2726                         for (i = 0; (mbox->numstatus == 0xFF) &&
2727                                         (i < MBOX_RESET_WAIT); i++) {
2728                                 rmb();
2729                                 con_log(CL_ANN, ("\b\b\b\b\b[%03d]",
2730                                                         MBOX_RESET_WAIT - i));
2731                                 msleep(1000);
2732                         }
2733
2734                         if (i == MBOX_RESET_WAIT) {
2735
2736                                 con_log(CL_ANN, (
2737                                 "\nmegaraid mailbox: status not available\n"));
2738
2739                                 return -1;
2740                         }
2741                         con_log(CL_ANN, ("\b\b\b\b\b[ok] \n"));
2742                 }
2743         }
2744
2745         // wait for maximum 1 second for poll semaphore
2746         if (mbox->poll != 0x77) {
2747                 udelay(25);
2748
2749                 for (i = 0; (mbox->poll != 0x77) && (i < 1000); i++) {
2750                         rmb();
2751                         msleep(1);
2752                 }
2753
2754                 if (i == 1000) {
2755                         con_log(CL_ANN, (KERN_WARNING
2756                         "megaraid mailbox: could not get poll semaphore\n"));
2757                         return -1;
2758                 }
2759         }
2760
2761         WRINDOOR(raid_dev, raid_dev->mbox_dma | 0x2);
2762         wmb();
2763
2764         // wait for maximum 1 second for acknowledgement
2765         if (RDINDOOR(raid_dev) & 0x2) {
2766                 udelay(25);
2767
2768                 for (i = 0; (RDINDOOR(raid_dev) & 0x2) && (i < 1000); i++) {
2769                         rmb();
2770                         msleep(1);
2771                 }
2772
2773                 if (i == 1000) {
2774                         con_log(CL_ANN, (KERN_WARNING
2775                                 "megaraid mailbox: could not acknowledge\n"));
2776                         return -1;
2777                 }
2778         }
2779         mbox->poll      = 0;
2780         mbox->ack       = 0x77;
2781
2782         status = mbox->status;
2783
2784         // invalidate the completed command id array. After command
2785         // completion, firmware would write the valid id.
2786         mbox->numstatus = 0xFF;
2787         mbox->status    = 0xFF;
2788         for (i = 0; i < MBOX_MAX_FIRMWARE_STATUS; i++) {
2789                 mbox->completed[i] = 0xFF;
2790         }
2791
2792         return status;
2793
2794 blocked_mailbox:
2795
2796         con_log(CL_ANN, (KERN_WARNING "megaraid: blocked mailbox\n") );
2797         return -1;
2798 }
2799
2800
2801 /**
2802  * mbox_post_sync_cmd_fast - blocking command to the mailbox based controllers
2803  * @adapter     : controller's soft state
2804  * @raw_mbox    : the mailbox
2805  *
2806  * Issue a scb in synchronous and non-interrupt mode for mailbox based
2807  * controllers. This is a faster version of the synchronous command and
2808  * therefore can be called in interrupt-context as well.
2809  */
2810 static int
2811 mbox_post_sync_cmd_fast(adapter_t *adapter, uint8_t raw_mbox[])
2812 {
2813         mraid_device_t  *raid_dev = ADAP2RAIDDEV(adapter);
2814         mbox_t          *mbox;
2815         long            i;
2816
2817
2818         mbox    = raid_dev->mbox;
2819
2820         // return immediately if the mailbox is busy
2821         if (mbox->busy) return -1;
2822
2823         // Copy mailbox data into host structure
2824         memcpy((caddr_t)mbox, (caddr_t)raw_mbox, 14);
2825         mbox->cmdid             = 0xFE;
2826         mbox->busy              = 1;
2827         mbox->poll              = 0;
2828         mbox->ack               = 0;
2829         mbox->numstatus         = 0xFF;
2830         mbox->status            = 0xFF;
2831
2832         wmb();
2833         WRINDOOR(raid_dev, raid_dev->mbox_dma | 0x1);
2834
2835         for (i = 0; i < MBOX_SYNC_WAIT_CNT; i++) {
2836                 if (mbox->numstatus != 0xFF) break;
2837                 rmb();
2838                 udelay(MBOX_SYNC_DELAY_200);
2839         }
2840
2841         if (i == MBOX_SYNC_WAIT_CNT) {
2842                 // We may need to re-calibrate the counter
2843                 con_log(CL_ANN, (KERN_CRIT
2844                         "megaraid: fast sync command timed out\n"));
2845         }
2846
2847         WRINDOOR(raid_dev, raid_dev->mbox_dma | 0x2);
2848         wmb();
2849
2850         return mbox->status;
2851 }
2852
2853
2854 /**
2855  * megaraid_busywait_mbox() - Wait until the controller's mailbox is available
2856  * @raid_dev    : RAID device (HBA) soft state
2857  *
2858  * Wait until the controller's mailbox is available to accept more commands.
2859  * Wait for at most 1 second.
2860  */
2861 static int
2862 megaraid_busywait_mbox(mraid_device_t *raid_dev)
2863 {
2864         mbox_t  *mbox = raid_dev->mbox;
2865         int     i = 0;
2866
2867         if (mbox->busy) {
2868                 udelay(25);
2869                 for (i = 0; mbox->busy && i < 1000; i++)
2870                         msleep(1);
2871         }
2872
2873         if (i < 1000) return 0;
2874         else return -1;
2875 }
2876
2877
2878 /**
2879  * megaraid_mbox_product_info - some static information about the controller
2880  * @adapter     : our soft state
2881  *
2882  * Issue commands to the controller to grab some parameters required by our
2883  * caller.
2884  */
2885 static int
2886 megaraid_mbox_product_info(adapter_t *adapter)
2887 {
2888         mraid_device_t          *raid_dev = ADAP2RAIDDEV(adapter);
2889         mbox_t                  *mbox;
2890         uint8_t                 raw_mbox[sizeof(mbox_t)];
2891         mraid_pinfo_t           *pinfo;
2892         dma_addr_t              pinfo_dma_h;
2893         mraid_inquiry3_t        *mraid_inq3;
2894         int                     i;
2895
2896
2897         memset((caddr_t)raw_mbox, 0, sizeof(raw_mbox));
2898         mbox = (mbox_t *)raw_mbox;
2899
2900         /*
2901          * Issue an ENQUIRY3 command to find out certain adapter parameters,
2902          * e.g., max channels, max commands etc.
2903          */
2904         pinfo = dma_zalloc_coherent(&adapter->pdev->dev, sizeof(mraid_pinfo_t),
2905                         &pinfo_dma_h, GFP_KERNEL);
2906         if (pinfo == NULL) {
2907                 con_log(CL_ANN, (KERN_WARNING
2908                         "megaraid: out of memory, %s %d\n", __func__,
2909                         __LINE__));
2910
2911                 return -1;
2912         }
2913
2914         mbox->xferaddr = (uint32_t)adapter->ibuf_dma_h;
2915         memset((void *)adapter->ibuf, 0, MBOX_IBUF_SIZE);
2916
2917         raw_mbox[0] = FC_NEW_CONFIG;
2918         raw_mbox[2] = NC_SUBOP_ENQUIRY3;
2919         raw_mbox[3] = ENQ3_GET_SOLICITED_FULL;
2920
2921         // Issue the command
2922         if (mbox_post_sync_cmd(adapter, raw_mbox) != 0) {
2923
2924                 con_log(CL_ANN, (KERN_WARNING "megaraid: Inquiry3 failed\n"));
2925
2926                 dma_free_coherent(&adapter->pdev->dev, sizeof(mraid_pinfo_t),
2927                         pinfo, pinfo_dma_h);
2928
2929                 return -1;
2930         }
2931
2932         /*
2933          * Collect information about state of each physical drive
2934          * attached to the controller. We will expose all the disks
2935          * which are not part of RAID
2936          */
2937         mraid_inq3 = (mraid_inquiry3_t *)adapter->ibuf;
2938         for (i = 0; i < MBOX_MAX_PHYSICAL_DRIVES; i++) {
2939                 raid_dev->pdrv_state[i] = mraid_inq3->pdrv_state[i];
2940         }
2941
2942         /*
2943          * Get product info for information like number of channels,
2944          * maximum commands supported.
2945          */
2946         memset((caddr_t)raw_mbox, 0, sizeof(raw_mbox));
2947         mbox->xferaddr = (uint32_t)pinfo_dma_h;
2948
2949         raw_mbox[0] = FC_NEW_CONFIG;
2950         raw_mbox[2] = NC_SUBOP_PRODUCT_INFO;
2951
2952         if (mbox_post_sync_cmd(adapter, raw_mbox) != 0) {
2953
2954                 con_log(CL_ANN, (KERN_WARNING
2955                         "megaraid: product info failed\n"));
2956
2957                 dma_free_coherent(&adapter->pdev->dev, sizeof(mraid_pinfo_t),
2958                         pinfo, pinfo_dma_h);
2959
2960                 return -1;
2961         }
2962
2963         /*
2964          * Setup some parameters for host, as required by our caller
2965          */
2966         adapter->max_channel = pinfo->nchannels;
2967
2968         /*
2969          * we will export all the logical drives on a single channel.
2970          * Add 1 since inquires do not come for inititor ID
2971          */
2972         adapter->max_target     = MAX_LOGICAL_DRIVES_40LD + 1;
2973         adapter->max_lun        = 8;    // up to 8 LUNs for non-disk devices
2974
2975         /*
2976          * These are the maximum outstanding commands for the scsi-layer
2977          */
2978         adapter->max_cmds       = MBOX_MAX_SCSI_CMDS;
2979
2980         memset(adapter->fw_version, 0, VERSION_SIZE);
2981         memset(adapter->bios_version, 0, VERSION_SIZE);
2982
2983         memcpy(adapter->fw_version, pinfo->fw_version, 4);
2984         adapter->fw_version[4] = 0;
2985
2986         memcpy(adapter->bios_version, pinfo->bios_version, 4);
2987         adapter->bios_version[4] = 0;
2988
2989         con_log(CL_ANN, (KERN_NOTICE
2990                 "megaraid: fw version:[%s] bios version:[%s]\n",
2991                 adapter->fw_version, adapter->bios_version));
2992
2993         dma_free_coherent(&adapter->pdev->dev, sizeof(mraid_pinfo_t), pinfo,
2994                         pinfo_dma_h);
2995
2996         return 0;
2997 }
2998
2999
3000
3001 /**
3002  * megaraid_mbox_extended_cdb - check for support for extended CDBs
3003  * @adapter     : soft state for the controller
3004  *
3005  * This routine check whether the controller in question supports extended
3006  * ( > 10 bytes ) CDBs.
3007  */
3008 static int
3009 megaraid_mbox_extended_cdb(adapter_t *adapter)
3010 {
3011         mbox_t          *mbox;
3012         uint8_t         raw_mbox[sizeof(mbox_t)];
3013         int             rval;
3014
3015         mbox = (mbox_t *)raw_mbox;
3016
3017         memset((caddr_t)raw_mbox, 0, sizeof(raw_mbox));
3018         mbox->xferaddr  = (uint32_t)adapter->ibuf_dma_h;
3019
3020         memset((void *)adapter->ibuf, 0, MBOX_IBUF_SIZE);
3021
3022         raw_mbox[0] = MAIN_MISC_OPCODE;
3023         raw_mbox[2] = SUPPORT_EXT_CDB;
3024
3025         /*
3026          * Issue the command
3027          */
3028         rval = 0;
3029         if (mbox_post_sync_cmd(adapter, raw_mbox) != 0) {
3030                 rval = -1;
3031         }
3032
3033         return rval;
3034 }
3035
3036
3037 /**
3038  * megaraid_mbox_support_ha - Do we support clustering
3039  * @adapter     : soft state for the controller
3040  * @init_id     : ID of the initiator
3041  *
3042  * Determine if the firmware supports clustering and the ID of the initiator.
3043  */
3044 static int
3045 megaraid_mbox_support_ha(adapter_t *adapter, uint16_t *init_id)
3046 {
3047         mbox_t          *mbox;
3048         uint8_t         raw_mbox[sizeof(mbox_t)];
3049         int             rval;
3050
3051
3052         mbox = (mbox_t *)raw_mbox;
3053
3054         memset((caddr_t)raw_mbox, 0, sizeof(raw_mbox));
3055
3056         mbox->xferaddr = (uint32_t)adapter->ibuf_dma_h;
3057
3058         memset((void *)adapter->ibuf, 0, MBOX_IBUF_SIZE);
3059
3060         raw_mbox[0] = GET_TARGET_ID;
3061
3062         // Issue the command
3063         *init_id = 7;
3064         rval =  -1;
3065         if (mbox_post_sync_cmd(adapter, raw_mbox) == 0) {
3066
3067                 *init_id = *(uint8_t *)adapter->ibuf;
3068
3069                 con_log(CL_ANN, (KERN_INFO
3070                         "megaraid: cluster firmware, initiator ID: %d\n",
3071                         *init_id));
3072
3073                 rval =  0;
3074         }
3075
3076         return rval;
3077 }
3078
3079
3080 /**
3081  * megaraid_mbox_support_random_del - Do we support random deletion
3082  * @adapter     : soft state for the controller
3083  *
3084  * Determine if the firmware supports random deletion.
3085  * Return:      1 is operation supported, 0 otherwise
3086  */
3087 static int
3088 megaraid_mbox_support_random_del(adapter_t *adapter)
3089 {
3090         uint8_t         raw_mbox[sizeof(mbox_t)];
3091         int             rval;
3092
3093         /*
3094          * Newer firmware on Dell CERC expect a different
3095          * random deletion handling, so disable it.
3096          */
3097         if (adapter->pdev->vendor == PCI_VENDOR_ID_AMI &&
3098             adapter->pdev->device == PCI_DEVICE_ID_AMI_MEGARAID3 &&
3099             adapter->pdev->subsystem_vendor == PCI_VENDOR_ID_DELL &&
3100             adapter->pdev->subsystem_device == PCI_SUBSYS_ID_CERC_ATA100_4CH &&
3101             (adapter->fw_version[0] > '6' ||
3102              (adapter->fw_version[0] == '6' &&
3103               adapter->fw_version[2] > '6') ||
3104              (adapter->fw_version[0] == '6'
3105               && adapter->fw_version[2] == '6'
3106               && adapter->fw_version[3] > '1'))) {
3107                 con_log(CL_DLEVEL1, ("megaraid: disable random deletion\n"));
3108                 return 0;
3109         }
3110
3111         memset((caddr_t)raw_mbox, 0, sizeof(mbox_t));
3112
3113         raw_mbox[0] = FC_DEL_LOGDRV;
3114         raw_mbox[2] = OP_SUP_DEL_LOGDRV;
3115
3116         // Issue the command
3117         rval = 0;
3118         if (mbox_post_sync_cmd(adapter, raw_mbox) == 0) {
3119
3120                 con_log(CL_DLEVEL1, ("megaraid: supports random deletion\n"));
3121
3122                 rval =  1;
3123         }
3124
3125         return rval;
3126 }
3127
3128
3129 /**
3130  * megaraid_mbox_get_max_sg - maximum sg elements supported by the firmware
3131  * @adapter     : soft state for the controller
3132  *
3133  * Find out the maximum number of scatter-gather elements supported by the
3134  * firmware.
3135  */
3136 static int
3137 megaraid_mbox_get_max_sg(adapter_t *adapter)
3138 {
3139         mbox_t          *mbox;
3140         uint8_t         raw_mbox[sizeof(mbox_t)];
3141         int             nsg;
3142
3143
3144         mbox = (mbox_t *)raw_mbox;
3145
3146         memset((caddr_t)raw_mbox, 0, sizeof(mbox_t));
3147
3148         mbox->xferaddr = (uint32_t)adapter->ibuf_dma_h;
3149
3150         memset((void *)adapter->ibuf, 0, MBOX_IBUF_SIZE);
3151
3152         raw_mbox[0] = MAIN_MISC_OPCODE;
3153         raw_mbox[2] = GET_MAX_SG_SUPPORT;
3154
3155         // Issue the command
3156         if (mbox_post_sync_cmd(adapter, raw_mbox) == 0) {
3157                 nsg =  *(uint8_t *)adapter->ibuf;
3158         }
3159         else {
3160                 nsg =  MBOX_DEFAULT_SG_SIZE;
3161         }
3162
3163         if (nsg > MBOX_MAX_SG_SIZE) nsg = MBOX_MAX_SG_SIZE;
3164
3165         return nsg;
3166 }
3167
3168
3169 /**
3170  * megaraid_mbox_enum_raid_scsi - enumerate the RAID and SCSI channels
3171  * @adapter     : soft state for the controller
3172  *
3173  * Enumerate the RAID and SCSI channels for ROMB platforms so that channels
3174  * can be exported as regular SCSI channels.
3175  */
3176 static void
3177 megaraid_mbox_enum_raid_scsi(adapter_t *adapter)
3178 {
3179         mraid_device_t  *raid_dev = ADAP2RAIDDEV(adapter);
3180         mbox_t          *mbox;
3181         uint8_t         raw_mbox[sizeof(mbox_t)];
3182
3183
3184         mbox = (mbox_t *)raw_mbox;
3185
3186         memset((caddr_t)raw_mbox, 0, sizeof(mbox_t));
3187
3188         mbox->xferaddr = (uint32_t)adapter->ibuf_dma_h;
3189
3190         memset((void *)adapter->ibuf, 0, MBOX_IBUF_SIZE);
3191
3192         raw_mbox[0] = CHNL_CLASS;
3193         raw_mbox[2] = GET_CHNL_CLASS;
3194
3195         // Issue the command. If the command fails, all channels are RAID
3196         // channels
3197         raid_dev->channel_class = 0xFF;
3198         if (mbox_post_sync_cmd(adapter, raw_mbox) == 0) {
3199                 raid_dev->channel_class =  *(uint8_t *)adapter->ibuf;
3200         }
3201
3202         return;
3203 }
3204
3205
3206 /**
3207  * megaraid_mbox_flush_cache - flush adapter and disks cache
3208  * @adapter             : soft state for the controller
3209  *
3210  * Flush adapter cache followed by disks cache.
3211  */
3212 static void
3213 megaraid_mbox_flush_cache(adapter_t *adapter)
3214 {
3215         uint8_t raw_mbox[sizeof(mbox_t)];
3216
3217         memset((caddr_t)raw_mbox, 0, sizeof(mbox_t));
3218
3219         raw_mbox[0] = FLUSH_ADAPTER;
3220
3221         if (mbox_post_sync_cmd(adapter, raw_mbox) != 0) {
3222                 con_log(CL_ANN, ("megaraid: flush adapter failed\n"));
3223         }
3224
3225         raw_mbox[0] = FLUSH_SYSTEM;
3226
3227         if (mbox_post_sync_cmd(adapter, raw_mbox) != 0) {
3228                 con_log(CL_ANN, ("megaraid: flush disks cache failed\n"));
3229         }
3230
3231         return;
3232 }
3233
3234
3235 /**
3236  * megaraid_mbox_fire_sync_cmd - fire the sync cmd
3237  * @adapter             : soft state for the controller
3238  *
3239  * Clears the pending cmds in FW and reinits its RAID structs.
3240  */
3241 static int
3242 megaraid_mbox_fire_sync_cmd(adapter_t *adapter)
3243 {
3244         mbox_t  *mbox;
3245         uint8_t raw_mbox[sizeof(mbox_t)];
3246         mraid_device_t  *raid_dev = ADAP2RAIDDEV(adapter);
3247         int     status = 0;
3248         int i;
3249         uint32_t dword;
3250
3251         mbox = (mbox_t *)raw_mbox;
3252
3253         memset((caddr_t)raw_mbox, 0, sizeof(mbox_t));
3254
3255         raw_mbox[0] = 0xFF;
3256
3257         mbox    = raid_dev->mbox;
3258
3259         /* Wait until mailbox is free */
3260         if (megaraid_busywait_mbox(raid_dev) != 0) {
3261                 status = 1;
3262                 goto blocked_mailbox;
3263         }
3264
3265         /* Copy mailbox data into host structure */
3266         memcpy((caddr_t)mbox, (caddr_t)raw_mbox, 16);
3267         mbox->cmdid             = 0xFE;
3268         mbox->busy              = 1;
3269         mbox->poll              = 0;
3270         mbox->ack               = 0;
3271         mbox->numstatus         = 0;
3272         mbox->status            = 0;
3273
3274         wmb();
3275         WRINDOOR(raid_dev, raid_dev->mbox_dma | 0x1);
3276
3277         /* Wait for maximum 1 min for status to post.
3278          * If the Firmware SUPPORTS the ABOVE COMMAND,
3279          * mbox->cmd will be set to 0
3280          * else
3281          * the firmware will reject the command with
3282          * mbox->numstatus set to 1
3283          */
3284
3285         i = 0;
3286         status = 0;
3287         while (!mbox->numstatus && mbox->cmd == 0xFF) {
3288                 rmb();
3289                 msleep(1);
3290                 i++;
3291                 if (i > 1000 * 60) {
3292                         status = 1;
3293                         break;
3294                 }
3295         }
3296         if (mbox->numstatus == 1)
3297                 status = 1; /*cmd not supported*/
3298
3299         /* Check for interrupt line */
3300         dword = RDOUTDOOR(raid_dev);
3301         WROUTDOOR(raid_dev, dword);
3302         WRINDOOR(raid_dev,2);
3303
3304         return status;
3305
3306 blocked_mailbox:
3307         con_log(CL_ANN, (KERN_WARNING "megaraid: blocked mailbox\n"));
3308         return status;
3309 }
3310
3311 /**
3312  * megaraid_mbox_display_scb - display SCB information, mostly debug purposes
3313  * @adapter             : controller's soft state
3314  * @scb                 : SCB to be displayed
3315  * @level               : debug level for console print
3316  *
3317  * Diplay information about the given SCB iff the current debug level is
3318  * verbose.
3319  */
3320 static void
3321 megaraid_mbox_display_scb(adapter_t *adapter, scb_t *scb)
3322 {
3323         mbox_ccb_t              *ccb;
3324         struct scsi_cmnd        *scp;
3325         mbox_t                  *mbox;
3326         int                     level;
3327         int                     i;
3328
3329
3330         ccb     = (mbox_ccb_t *)scb->ccb;
3331         scp     = scb->scp;
3332         mbox    = ccb->mbox;
3333
3334         level = CL_DLEVEL3;
3335
3336         con_log(level, (KERN_NOTICE
3337                 "megaraid mailbox: status:%#x cmd:%#x id:%#x ", scb->status,
3338                 mbox->cmd, scb->sno));
3339
3340         con_log(level, ("sec:%#x lba:%#x addr:%#x ld:%d sg:%d\n",
3341                 mbox->numsectors, mbox->lba, mbox->xferaddr, mbox->logdrv,
3342                 mbox->numsge));
3343
3344         if (!scp) return;
3345
3346         con_log(level, (KERN_NOTICE "scsi cmnd: "));
3347
3348         for (i = 0; i < scp->cmd_len; i++) {
3349                 con_log(level, ("%#2.02x ", scp->cmnd[i]));
3350         }
3351
3352         con_log(level, ("\n"));
3353
3354         return;
3355 }
3356
3357
3358 /**
3359  * megaraid_mbox_setup_device_map - manage device ids
3360  * @adapter     : Driver's soft state
3361  *
3362  * Manage the device ids to have an appropriate mapping between the kernel
3363  * scsi addresses and megaraid scsi and logical drive addresses. We export
3364  * scsi devices on their actual addresses, whereas the logical drives are
3365  * exported on a virtual scsi channel.
3366  */
3367 static void
3368 megaraid_mbox_setup_device_map(adapter_t *adapter)
3369 {
3370         uint8_t         c;
3371         uint8_t         t;
3372
3373         /*
3374          * First fill the values on the logical drive channel
3375          */
3376         for (t = 0; t < LSI_MAX_LOGICAL_DRIVES_64LD; t++)
3377                 adapter->device_ids[adapter->max_channel][t] =
3378                         (t < adapter->init_id) ?  t : t - 1;
3379
3380         adapter->device_ids[adapter->max_channel][adapter->init_id] = 0xFF;
3381
3382         /*
3383          * Fill the values on the physical devices channels
3384          */
3385         for (c = 0; c < adapter->max_channel; c++)
3386                 for (t = 0; t < LSI_MAX_LOGICAL_DRIVES_64LD; t++)
3387                         adapter->device_ids[c][t] = (c << 8) | t;
3388 }
3389
3390
3391 /*
3392  * END: internal commands library
3393  */
3394
3395 /*
3396  * START: Interface for the common management module
3397  *
3398  * This is the module, which interfaces with the common management module to
3399  * provide support for ioctl and sysfs
3400  */
3401
3402 /**
3403  * megaraid_cmm_register - register with the management module
3404  * @adapter             : HBA soft state
3405  *
3406  * Register with the management module, which allows applications to issue
3407  * ioctl calls to the drivers. This interface is used by the management module
3408  * to setup sysfs support as well.
3409  */
3410 static int
3411 megaraid_cmm_register(adapter_t *adapter)
3412 {
3413         mraid_device_t  *raid_dev = ADAP2RAIDDEV(adapter);
3414         mraid_mmadp_t   adp;
3415         scb_t           *scb;
3416         mbox_ccb_t      *ccb;
3417         int             rval;
3418         int             i;
3419
3420         // Allocate memory for the base list of scb for management module.
3421         adapter->uscb_list = kcalloc(MBOX_MAX_USER_CMDS, sizeof(scb_t), GFP_KERNEL);
3422
3423         if (adapter->uscb_list == NULL) {
3424                 con_log(CL_ANN, (KERN_WARNING
3425                         "megaraid: out of memory, %s %d\n", __func__,
3426                         __LINE__));
3427                 return -1;
3428         }
3429
3430
3431         // Initialize the synchronization parameters for resources for
3432         // commands for management module
3433         INIT_LIST_HEAD(&adapter->uscb_pool);
3434
3435         spin_lock_init(USER_FREE_LIST_LOCK(adapter));
3436
3437
3438
3439         // link all the packets. Note, CCB for commands, coming from the
3440         // commom management module, mailbox physical address are already
3441         // setup by it. We just need placeholder for that in our local command
3442         // control blocks
3443         for (i = 0; i < MBOX_MAX_USER_CMDS; i++) {
3444
3445                 scb                     = adapter->uscb_list + i;
3446                 ccb                     = raid_dev->uccb_list + i;
3447
3448                 scb->ccb                = (caddr_t)ccb;
3449                 ccb->mbox64             = raid_dev->umbox64 + i;
3450                 ccb->mbox               = &ccb->mbox64->mbox32;
3451                 ccb->raw_mbox           = (uint8_t *)ccb->mbox;
3452
3453                 scb->gp                 = 0;
3454
3455                 // COMMAND ID 0 - (MBOX_MAX_SCSI_CMDS-1) ARE RESERVED FOR
3456                 // COMMANDS COMING FROM IO SUBSYSTEM (MID-LAYER)
3457                 scb->sno                = i + MBOX_MAX_SCSI_CMDS;
3458
3459                 scb->scp                = NULL;
3460                 scb->state              = SCB_FREE;
3461                 scb->dma_direction      = DMA_NONE;
3462                 scb->dma_type           = MRAID_DMA_NONE;
3463                 scb->dev_channel        = -1;
3464                 scb->dev_target         = -1;
3465
3466                 // put scb in the free pool
3467                 list_add_tail(&scb->list, &adapter->uscb_pool);
3468         }
3469
3470         adp.unique_id           = adapter->unique_id;
3471         adp.drvr_type           = DRVRTYPE_MBOX;
3472         adp.drvr_data           = (unsigned long)adapter;
3473         adp.pdev                = adapter->pdev;
3474         adp.issue_uioc          = megaraid_mbox_mm_handler;
3475         adp.timeout             = MBOX_RESET_WAIT + MBOX_RESET_EXT_WAIT;
3476         adp.max_kioc            = MBOX_MAX_USER_CMDS;
3477
3478         if ((rval = mraid_mm_register_adp(&adp)) != 0) {
3479
3480                 con_log(CL_ANN, (KERN_WARNING
3481                         "megaraid mbox: did not register with CMM\n"));
3482
3483                 kfree(adapter->uscb_list);
3484         }
3485
3486         return rval;
3487 }
3488
3489
3490 /**
3491  * megaraid_cmm_unregister - un-register with the management module
3492  * @adapter             : HBA soft state
3493  *
3494  * Un-register with the management module.
3495  * FIXME: mgmt module must return failure for unregister if it has pending
3496  * commands in LLD.
3497  */
3498 static int
3499 megaraid_cmm_unregister(adapter_t *adapter)
3500 {
3501         kfree(adapter->uscb_list);
3502         mraid_mm_unregister_adp(adapter->unique_id);
3503         return 0;
3504 }
3505
3506
3507 /**
3508  * megaraid_mbox_mm_handler - interface for CMM to issue commands to LLD
3509  * @drvr_data           : LLD specific data
3510  * @kioc                : CMM interface packet
3511  * @action              : command action
3512  *
3513  * This routine is invoked whenever the Common Management Module (CMM) has a
3514  * command for us. The 'action' parameter specifies if this is a new command
3515  * or otherwise.
3516  */
3517 static int
3518 megaraid_mbox_mm_handler(unsigned long drvr_data, uioc_t *kioc, uint32_t action)
3519 {
3520         adapter_t *adapter;
3521
3522         if (action != IOCTL_ISSUE) {
3523                 con_log(CL_ANN, (KERN_WARNING
3524                         "megaraid: unsupported management action:%#2x\n",
3525                         action));
3526                 return (-ENOTSUPP);
3527         }
3528
3529         adapter = (adapter_t *)drvr_data;
3530
3531         // make sure this adapter is not being detached right now.
3532         if (atomic_read(&adapter->being_detached)) {
3533                 con_log(CL_ANN, (KERN_WARNING
3534                         "megaraid: reject management request, detaching\n"));
3535                 return (-ENODEV);
3536         }
3537
3538         switch (kioc->opcode) {
3539
3540         case GET_ADAP_INFO:
3541
3542                 kioc->status =  gather_hbainfo(adapter, (mraid_hba_info_t *)
3543                                         (unsigned long)kioc->buf_vaddr);
3544
3545                 kioc->done(kioc);
3546
3547                 return kioc->status;
3548
3549         case MBOX_CMD:
3550
3551                 return megaraid_mbox_mm_command(adapter, kioc);
3552
3553         default:
3554                 kioc->status = (-EINVAL);
3555                 kioc->done(kioc);
3556                 return (-EINVAL);
3557         }
3558
3559         return 0;       // not reached
3560 }
3561
3562 /**
3563  * megaraid_mbox_mm_command - issues commands routed through CMM
3564  * @adapter             : HBA soft state
3565  * @kioc                : management command packet
3566  *
3567  * Issues commands, which are routed through the management module.
3568  */
3569 static int
3570 megaraid_mbox_mm_command(adapter_t *adapter, uioc_t *kioc)
3571 {
3572         struct list_head        *head = &adapter->uscb_pool;
3573         mbox64_t                *mbox64;
3574         uint8_t                 *raw_mbox;
3575         scb_t                   *scb;
3576         mbox_ccb_t              *ccb;
3577         unsigned long           flags;
3578
3579         // detach one scb from free pool
3580         spin_lock_irqsave(USER_FREE_LIST_LOCK(adapter), flags);
3581
3582         if (list_empty(head)) { // should never happen because of CMM
3583
3584                 con_log(CL_ANN, (KERN_WARNING
3585                         "megaraid mbox: bug in cmm handler, lost resources\n"));
3586
3587                 spin_unlock_irqrestore(USER_FREE_LIST_LOCK(adapter), flags);
3588
3589                 return (-EINVAL);
3590         }
3591
3592         scb = list_entry(head->next, scb_t, list);
3593         list_del_init(&scb->list);
3594
3595         spin_unlock_irqrestore(USER_FREE_LIST_LOCK(adapter), flags);
3596
3597         scb->state              = SCB_ACTIVE;
3598         scb->dma_type           = MRAID_DMA_NONE;
3599         scb->dma_direction      = DMA_NONE;
3600
3601         ccb             = (mbox_ccb_t *)scb->ccb;
3602         mbox64          = (mbox64_t *)(unsigned long)kioc->cmdbuf;
3603         raw_mbox        = (uint8_t *)&mbox64->mbox32;
3604
3605         memcpy(ccb->mbox64, mbox64, sizeof(mbox64_t));
3606
3607         scb->gp         = (unsigned long)kioc;
3608
3609         /*
3610          * If it is a logdrv random delete operation, we have to wait till
3611          * there are no outstanding cmds at the fw and then issue it directly
3612          */
3613         if (raw_mbox[0] == FC_DEL_LOGDRV && raw_mbox[2] == OP_DEL_LOGDRV) {
3614
3615                 if (wait_till_fw_empty(adapter)) {
3616                         con_log(CL_ANN, (KERN_NOTICE
3617                                 "megaraid mbox: LD delete, timed out\n"));
3618
3619                         kioc->status = -ETIME;
3620
3621                         scb->status = -1;
3622
3623                         megaraid_mbox_mm_done(adapter, scb);
3624
3625                         return (-ETIME);
3626                 }
3627
3628                 INIT_LIST_HEAD(&scb->list);
3629
3630                 scb->state = SCB_ISSUED;
3631                 if (mbox_post_cmd(adapter, scb) != 0) {
3632
3633                         con_log(CL_ANN, (KERN_NOTICE
3634                                 "megaraid mbox: LD delete, mailbox busy\n"));
3635
3636                         kioc->status = -EBUSY;
3637
3638                         scb->status = -1;
3639
3640                         megaraid_mbox_mm_done(adapter, scb);
3641
3642                         return (-EBUSY);
3643                 }
3644
3645                 return 0;
3646         }
3647
3648         // put the command on the pending list and execute
3649         megaraid_mbox_runpendq(adapter, scb);
3650
3651         return 0;
3652 }
3653
3654
3655 static int
3656 wait_till_fw_empty(adapter_t *adapter)
3657 {
3658         unsigned long   flags = 0;
3659         int             i;
3660
3661
3662         /*
3663          * Set the quiescent flag to stop issuing cmds to FW.
3664          */
3665         spin_lock_irqsave(&adapter->lock, flags);
3666         adapter->quiescent++;
3667         spin_unlock_irqrestore(&adapter->lock, flags);
3668
3669         /*
3670          * Wait till there are no more cmds outstanding at FW. Try for at most
3671          * 60 seconds
3672          */
3673         for (i = 0; i < 60 && adapter->outstanding_cmds; i++) {
3674                 con_log(CL_DLEVEL1, (KERN_INFO
3675                         "megaraid: FW has %d pending commands\n",
3676                         adapter->outstanding_cmds));
3677
3678                 msleep(1000);
3679         }
3680
3681         return adapter->outstanding_cmds;
3682 }
3683
3684
3685 /**
3686  * megaraid_mbox_mm_done - callback for CMM commands
3687  * @adapter     : HBA soft state
3688  * @scb         : completed command
3689  *
3690  * Callback routine for internal commands originated from the management
3691  * module.
3692  */
3693 static void
3694 megaraid_mbox_mm_done(adapter_t *adapter, scb_t *scb)
3695 {
3696         uioc_t                  *kioc;
3697         mbox64_t                *mbox64;
3698         uint8_t                 *raw_mbox;
3699         unsigned long           flags;
3700
3701         kioc                    = (uioc_t *)scb->gp;
3702         mbox64                  = (mbox64_t *)(unsigned long)kioc->cmdbuf;
3703         mbox64->mbox32.status   = scb->status;
3704         raw_mbox                = (uint8_t *)&mbox64->mbox32;
3705
3706
3707         // put scb in the free pool
3708         scb->state      = SCB_FREE;
3709         scb->scp        = NULL;
3710
3711         spin_lock_irqsave(USER_FREE_LIST_LOCK(adapter), flags);
3712
3713         list_add(&scb->list, &adapter->uscb_pool);
3714
3715         spin_unlock_irqrestore(USER_FREE_LIST_LOCK(adapter), flags);
3716
3717         // if a delete logical drive operation succeeded, restart the
3718         // controller
3719         if (raw_mbox[0] == FC_DEL_LOGDRV && raw_mbox[2] == OP_DEL_LOGDRV) {
3720
3721                 adapter->quiescent--;
3722
3723                 megaraid_mbox_runpendq(adapter, NULL);
3724         }
3725
3726         kioc->done(kioc);
3727
3728         return;
3729 }
3730
3731
3732 /**
3733  * gather_hbainfo - HBA characteristics for the applications
3734  * @adapter             : HBA soft state
3735  * @hinfo               : pointer to the caller's host info strucuture
3736  */
3737 static int
3738 gather_hbainfo(adapter_t *adapter, mraid_hba_info_t *hinfo)
3739 {
3740         hinfo->pci_vendor_id    = adapter->pdev->vendor;
3741         hinfo->pci_device_id    = adapter->pdev->device;
3742         hinfo->subsys_vendor_id = adapter->pdev->subsystem_vendor;
3743         hinfo->subsys_device_id = adapter->pdev->subsystem_device;
3744
3745         hinfo->pci_bus          = adapter->pdev->bus->number;
3746         hinfo->pci_dev_fn       = adapter->pdev->devfn;
3747         hinfo->pci_slot         = PCI_SLOT(adapter->pdev->devfn);
3748         hinfo->irq              = adapter->host->irq;
3749         hinfo->baseport         = ADAP2RAIDDEV(adapter)->baseport;
3750
3751         hinfo->unique_id        = (hinfo->pci_bus << 8) | adapter->pdev->devfn;
3752         hinfo->host_no          = adapter->host->host_no;
3753
3754         return 0;
3755 }
3756
3757 /*
3758  * END: Interface for the common management module
3759  */
3760
3761
3762
3763 /**
3764  * megaraid_sysfs_alloc_resources - allocate sysfs related resources
3765  * @adapter     : controller's soft state
3766  *
3767  * Allocate packets required to issue FW calls whenever the sysfs attributes
3768  * are read. These attributes would require up-to-date information from the
3769  * FW. Also set up resources for mutual exclusion to share these resources and
3770  * the wait queue.
3771  *
3772  * Return 0 on success.
3773  * Return -ERROR_CODE on failure.
3774  */
3775 static int
3776 megaraid_sysfs_alloc_resources(adapter_t *adapter)
3777 {
3778         mraid_device_t  *raid_dev = ADAP2RAIDDEV(adapter);
3779         int             rval = 0;
3780
3781         raid_dev->sysfs_uioc = kmalloc(sizeof(uioc_t), GFP_KERNEL);
3782
3783         raid_dev->sysfs_mbox64 = kmalloc(sizeof(mbox64_t), GFP_KERNEL);
3784
3785         raid_dev->sysfs_buffer = dma_alloc_coherent(&adapter->pdev->dev,
3786                         PAGE_SIZE, &raid_dev->sysfs_buffer_dma, GFP_KERNEL);
3787
3788         if (!raid_dev->sysfs_uioc || !raid_dev->sysfs_mbox64 ||
3789                 !raid_dev->sysfs_buffer) {
3790
3791                 con_log(CL_ANN, (KERN_WARNING
3792                         "megaraid: out of memory, %s %d\n", __func__,
3793                         __LINE__));
3794
3795                 rval = -ENOMEM;
3796
3797                 megaraid_sysfs_free_resources(adapter);
3798         }
3799
3800         mutex_init(&raid_dev->sysfs_mtx);
3801
3802         init_waitqueue_head(&raid_dev->sysfs_wait_q);
3803
3804         return rval;
3805 }
3806
3807
3808 /**
3809  * megaraid_sysfs_free_resources - free sysfs related resources
3810  * @adapter     : controller's soft state
3811  *
3812  * Free packets allocated for sysfs FW commands
3813  */
3814 static void
3815 megaraid_sysfs_free_resources(adapter_t *adapter)
3816 {
3817         mraid_device_t  *raid_dev = ADAP2RAIDDEV(adapter);
3818
3819         kfree(raid_dev->sysfs_uioc);
3820         kfree(raid_dev->sysfs_mbox64);
3821
3822         if (raid_dev->sysfs_buffer) {
3823                 dma_free_coherent(&adapter->pdev->dev, PAGE_SIZE,
3824                         raid_dev->sysfs_buffer, raid_dev->sysfs_buffer_dma);
3825         }
3826 }
3827
3828
3829 /**
3830  * megaraid_sysfs_get_ldmap_done - callback for get ldmap
3831  * @uioc        : completed packet
3832  *
3833  * Callback routine called in the ISR/tasklet context for get ldmap call
3834  */
3835 static void
3836 megaraid_sysfs_get_ldmap_done(uioc_t *uioc)
3837 {
3838         adapter_t       *adapter = (adapter_t *)uioc->buf_vaddr;
3839         mraid_device_t  *raid_dev = ADAP2RAIDDEV(adapter);
3840
3841         uioc->status = 0;
3842
3843         wake_up(&raid_dev->sysfs_wait_q);
3844 }
3845
3846 /**
3847  * megaraid_sysfs_get_ldmap_timeout - timeout handling for get ldmap
3848  * @t   : timed out timer
3849  *
3850  * Timeout routine to recover and return to application, in case the adapter
3851  * has stopped responding. A timeout of 60 seconds for this command seems like
3852  * a good value.
3853  */
3854 static void
3855 megaraid_sysfs_get_ldmap_timeout(struct timer_list *t)
3856 {
3857         struct uioc_timeout *timeout = from_timer(timeout, t, timer);
3858         uioc_t          *uioc = timeout->uioc;
3859         adapter_t       *adapter = (adapter_t *)uioc->buf_vaddr;
3860         mraid_device_t  *raid_dev = ADAP2RAIDDEV(adapter);
3861
3862         uioc->status = -ETIME;
3863
3864         wake_up(&raid_dev->sysfs_wait_q);
3865 }
3866
3867
3868 /**
3869  * megaraid_sysfs_get_ldmap - get update logical drive map
3870  * @adapter     : controller's soft state
3871  *
3872  * This routine will be called whenever user reads the logical drive
3873  * attributes, go get the current logical drive mapping table from the
3874  * firmware. We use the management API's to issue commands to the controller.
3875  *
3876  * NOTE: The commands issuance functionality is not generalized and
3877  * implemented in context of "get ld map" command only. If required, the
3878  * command issuance logical can be trivially pulled out and implemented as a
3879  * standalone library. For now, this should suffice since there is no other
3880  * user of this interface.
3881  *
3882  * Return 0 on success.
3883  * Return -1 on failure.
3884  */
3885 static int
3886 megaraid_sysfs_get_ldmap(adapter_t *adapter)
3887 {
3888         mraid_device_t          *raid_dev = ADAP2RAIDDEV(adapter);
3889         uioc_t                  *uioc;
3890         mbox64_t                *mbox64;
3891         mbox_t                  *mbox;
3892         char                    *raw_mbox;
3893         struct uioc_timeout     timeout;
3894         caddr_t                 ldmap;
3895         int                     rval = 0;
3896
3897         /*
3898          * Allow only one read at a time to go through the sysfs attributes
3899          */
3900         mutex_lock(&raid_dev->sysfs_mtx);
3901
3902         uioc    = raid_dev->sysfs_uioc;
3903         mbox64  = raid_dev->sysfs_mbox64;
3904         ldmap   = raid_dev->sysfs_buffer;
3905
3906         memset(uioc, 0, sizeof(uioc_t));
3907         memset(mbox64, 0, sizeof(mbox64_t));
3908         memset(ldmap, 0, sizeof(raid_dev->curr_ldmap));
3909
3910         mbox            = &mbox64->mbox32;
3911         raw_mbox        = (char *)mbox;
3912         uioc->cmdbuf    = (uint64_t)(unsigned long)mbox64;
3913         uioc->buf_vaddr = (caddr_t)adapter;
3914         uioc->status    = -ENODATA;
3915         uioc->done      = megaraid_sysfs_get_ldmap_done;
3916
3917         /*
3918          * Prepare the mailbox packet to get the current logical drive mapping
3919          * table
3920          */
3921         mbox->xferaddr = (uint32_t)raid_dev->sysfs_buffer_dma;
3922
3923         raw_mbox[0] = FC_DEL_LOGDRV;
3924         raw_mbox[2] = OP_GET_LDID_MAP;
3925
3926         /*
3927          * Setup a timer to recover from a non-responding controller
3928          */
3929         timeout.uioc = uioc;
3930         timer_setup_on_stack(&timeout.timer,
3931                              megaraid_sysfs_get_ldmap_timeout, 0);
3932
3933         timeout.timer.expires           = jiffies + 60 * HZ;
3934         add_timer(&timeout.timer);
3935
3936         /*
3937          * Send the command to the firmware
3938          */
3939         rval = megaraid_mbox_mm_command(adapter, uioc);
3940
3941         if (rval == 0) {        // command successfully issued
3942                 wait_event(raid_dev->sysfs_wait_q, (uioc->status != -ENODATA));
3943
3944                 /*
3945                  * Check if the command timed out
3946                  */
3947                 if (uioc->status == -ETIME) {
3948                         con_log(CL_ANN, (KERN_NOTICE
3949                                 "megaraid: sysfs get ld map timed out\n"));
3950
3951                         rval = -ETIME;
3952                 }
3953                 else {
3954                         rval = mbox->status;
3955                 }
3956
3957                 if (rval == 0) {
3958                         memcpy(raid_dev->curr_ldmap, ldmap,
3959                                 sizeof(raid_dev->curr_ldmap));
3960                 }
3961                 else {
3962                         con_log(CL_ANN, (KERN_NOTICE
3963                                 "megaraid: get ld map failed with %x\n", rval));
3964                 }
3965         }
3966         else {
3967                 con_log(CL_ANN, (KERN_NOTICE
3968                         "megaraid: could not issue ldmap command:%x\n", rval));
3969         }
3970
3971
3972         del_timer_sync(&timeout.timer);
3973         destroy_timer_on_stack(&timeout.timer);
3974
3975         mutex_unlock(&raid_dev->sysfs_mtx);
3976
3977         return rval;
3978 }
3979
3980
3981 /**
3982  * megaraid_sysfs_show_app_hndl - display application handle for this adapter
3983  * @cdev        : class device object representation for the host
3984  * @buf         : buffer to send data to
3985  *
3986  * Display the handle used by the applications while executing management
3987  * tasks on the adapter. We invoke a management module API to get the adapter
3988  * handle, since we do not interface with applications directly.
3989  */
3990 static ssize_t
3991 megaraid_sysfs_show_app_hndl(struct device *dev, struct device_attribute *attr,
3992                              char *buf)
3993 {
3994         struct Scsi_Host *shost = class_to_shost(dev);
3995         adapter_t       *adapter = (adapter_t *)SCSIHOST2ADAP(shost);
3996         uint32_t        app_hndl;
3997
3998         app_hndl = mraid_mm_adapter_app_handle(adapter->unique_id);
3999
4000         return snprintf(buf, 8, "%u\n", app_hndl);
4001 }
4002
4003
4004 /**
4005  * megaraid_sysfs_show_ldnum - display the logical drive number for this device
4006  * @dev         : device object representation for the scsi device
4007  * @attr        : device attribute to show
4008  * @buf         : buffer to send data to
4009  *
4010  * Display the logical drive number for the device in question, if it a valid
4011  * logical drive. For physical devices, "-1" is returned.
4012  *
4013  * The logical drive number is displayed in following format:
4014  *
4015  * <SCSI ID> <LD NUM> <LD STICKY ID> <APP ADAPTER HANDLE>
4016  *
4017  *   <int>     <int>       <int>            <int>
4018  */
4019 static ssize_t
4020 megaraid_sysfs_show_ldnum(struct device *dev, struct device_attribute *attr, char *buf)
4021 {
4022         struct scsi_device *sdev = to_scsi_device(dev);
4023         adapter_t       *adapter = (adapter_t *)SCSIHOST2ADAP(sdev->host);
4024         mraid_device_t  *raid_dev = ADAP2RAIDDEV(adapter);
4025         int             scsi_id = -1;
4026         int             logical_drv = -1;
4027         int             ldid_map = -1;
4028         uint32_t        app_hndl = 0;
4029         int             mapped_sdev_id;
4030         int             rval;
4031         int             i;
4032
4033         if (raid_dev->random_del_supported &&
4034                         MRAID_IS_LOGICAL_SDEV(adapter, sdev)) {
4035
4036                 rval = megaraid_sysfs_get_ldmap(adapter);
4037                 if (rval == 0) {
4038
4039                         for (i = 0; i < MAX_LOGICAL_DRIVES_40LD; i++) {
4040
4041                                 mapped_sdev_id = sdev->id;
4042
4043                                 if (sdev->id > adapter->init_id) {
4044                                         mapped_sdev_id -= 1;
4045                                 }
4046
4047                                 if (raid_dev->curr_ldmap[i] == mapped_sdev_id) {
4048
4049                                         scsi_id = sdev->id;
4050
4051                                         logical_drv = i;
4052
4053                                         ldid_map = raid_dev->curr_ldmap[i];
4054
4055                                         app_hndl = mraid_mm_adapter_app_handle(
4056                                                         adapter->unique_id);
4057
4058                                         break;
4059                                 }
4060                         }
4061                 }
4062                 else {
4063                         con_log(CL_ANN, (KERN_NOTICE
4064                                 "megaraid: sysfs get ld map failed: %x\n",
4065                                 rval));
4066                 }
4067         }
4068
4069         return snprintf(buf, 36, "%d %d %d %d\n", scsi_id, logical_drv,
4070                         ldid_map, app_hndl);
4071 }
4072
4073
4074 /*
4075  * END: Mailbox Low Level Driver
4076  */
4077 module_init(megaraid_init);
4078 module_exit(megaraid_exit);
4079
4080 /* vim: set ts=8 sw=8 tw=78 ai si: */