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             <Atul.Mukker@lsi.com>
  17  *      Sreenivas Bagalkote     <Sreenivas.Bagalkote@lsi.com>
  18  *      Manoj Jose              <Manoj.Jose@lsi.com>
  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("megaraidlinux@lsi.com");
 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  * ### global data ###
 206  */
 207 static uint8_t megaraid_mbox_version[8] =
 208         { 0x02, 0x20, 0x04, 0x06, 3, 7, 20, 5 };
 209
 210
 211 /*
 212  * PCI table for all supported controllers.
 213  */
 214 static struct pci_device_id pci_id_table_g[] =  {
 215         {
 216                 PCI_VENDOR_ID_DELL,
 217                 PCI_DEVICE_ID_PERC4_DI_DISCOVERY,
 218                 PCI_VENDOR_ID_DELL,
 219                 PCI_SUBSYS_ID_PERC4_DI_DISCOVERY,
 220         },
 221         {
 222                 PCI_VENDOR_ID_LSI_LOGIC,
 223                 PCI_DEVICE_ID_PERC4_SC,
 224                 PCI_VENDOR_ID_DELL,
 225                 PCI_SUBSYS_ID_PERC4_SC,
 226         },
 227         {
 228                 PCI_VENDOR_ID_LSI_LOGIC,
 229                 PCI_DEVICE_ID_PERC4_DC,
 230                 PCI_VENDOR_ID_DELL,
 231                 PCI_SUBSYS_ID_PERC4_DC,
 232         },
 233         {
 234                 PCI_VENDOR_ID_LSI_LOGIC,
 235                 PCI_DEVICE_ID_VERDE,
 236                 PCI_ANY_ID,
 237                 PCI_ANY_ID,
 238         },
 239         {
 240                 PCI_VENDOR_ID_DELL,
 241                 PCI_DEVICE_ID_PERC4_DI_EVERGLADES,
 242                 PCI_VENDOR_ID_DELL,
 243                 PCI_SUBSYS_ID_PERC4_DI_EVERGLADES,
 244         },
 245         {
 246                 PCI_VENDOR_ID_DELL,
 247                 PCI_DEVICE_ID_PERC4E_SI_BIGBEND,
 248                 PCI_VENDOR_ID_DELL,
 249                 PCI_SUBSYS_ID_PERC4E_SI_BIGBEND,
 250         },
 251         {
 252                 PCI_VENDOR_ID_DELL,
 253                 PCI_DEVICE_ID_PERC4E_DI_KOBUK,
 254                 PCI_VENDOR_ID_DELL,
 255                 PCI_SUBSYS_ID_PERC4E_DI_KOBUK,
 256         },
 257         {
 258                 PCI_VENDOR_ID_DELL,
 259                 PCI_DEVICE_ID_PERC4E_DI_CORVETTE,
 260                 PCI_VENDOR_ID_DELL,
 261                 PCI_SUBSYS_ID_PERC4E_DI_CORVETTE,
 262         },
 263         {
 264                 PCI_VENDOR_ID_DELL,
 265                 PCI_DEVICE_ID_PERC4E_DI_EXPEDITION,
 266                 PCI_VENDOR_ID_DELL,
 267                 PCI_SUBSYS_ID_PERC4E_DI_EXPEDITION,
 268         },
 269         {
 270                 PCI_VENDOR_ID_DELL,
 271                 PCI_DEVICE_ID_PERC4E_DI_GUADALUPE,
 272                 PCI_VENDOR_ID_DELL,
 273                 PCI_SUBSYS_ID_PERC4E_DI_GUADALUPE,
 274         },
 275         {
 276                 PCI_VENDOR_ID_LSI_LOGIC,
 277                 PCI_DEVICE_ID_DOBSON,
 278                 PCI_ANY_ID,
 279                 PCI_ANY_ID,
 280         },
 281         {
 282                 PCI_VENDOR_ID_AMI,
 283                 PCI_DEVICE_ID_AMI_MEGARAID3,
 284                 PCI_ANY_ID,
 285                 PCI_ANY_ID,
 286         },
 287         {
 288                 PCI_VENDOR_ID_LSI_LOGIC,
 289                 PCI_DEVICE_ID_AMI_MEGARAID3,
 290                 PCI_ANY_ID,
 291                 PCI_ANY_ID,
 292         },
 293         {
 294                 PCI_VENDOR_ID_LSI_LOGIC,
 295                 PCI_DEVICE_ID_LINDSAY,
 296                 PCI_ANY_ID,
 297                 PCI_ANY_ID,
 298         },
 299         {0}     /* Terminating entry */
 300 };
 301 MODULE_DEVICE_TABLE(pci, pci_id_table_g);
 302
 303
 304 static struct pci_driver megaraid_pci_driver = {
 305         .name           = "megaraid",
 306         .id_table       = pci_id_table_g,
 307         .probe          = megaraid_probe_one,
 308         .remove         = megaraid_detach_one,
 309         .shutdown       = megaraid_mbox_shutdown,
 310 };
 311
 312
 313
 314 // definitions for the device attributes for exporting logical drive number
 315 // for a scsi address (Host, Channel, Id, Lun)
 316
 317 DEVICE_ATTR(megaraid_mbox_app_hndl, S_IRUSR, megaraid_sysfs_show_app_hndl,
 318                 NULL);
 319
 320 // Host template initializer for megaraid mbox sysfs device attributes
 321 static struct device_attribute *megaraid_shost_attrs[] = {
 322         &dev_attr_megaraid_mbox_app_hndl,
 323         NULL,
 324 };
 325
 326
 327 DEVICE_ATTR(megaraid_mbox_ld, S_IRUSR, megaraid_sysfs_show_ldnum, NULL);
 328
 329 // Host template initializer for megaraid mbox sysfs device attributes
 330 static struct device_attribute *megaraid_sdev_attrs[] = {
 331         &dev_attr_megaraid_mbox_ld,
 332         NULL,
 333 };
 334
 335 /*
 336  * Scsi host template for megaraid unified driver
 337  */
 338 static struct scsi_host_template megaraid_template_g = {
 339         .module                         = THIS_MODULE,
 340         .name                           = "LSI Logic MegaRAID driver",
 341         .proc_name                      = "megaraid",
 342         .queuecommand                   = megaraid_queue_command,
 343         .eh_abort_handler               = megaraid_abort_handler,
 344         .eh_host_reset_handler          = megaraid_reset_handler,
 345         .change_queue_depth             = scsi_change_queue_depth,
 346         .use_clustering                 = ENABLE_CLUSTERING,
 347         .no_write_same                  = 1,
 348         .sdev_attrs                     = megaraid_sdev_attrs,
 349         .shost_attrs                    = megaraid_shost_attrs,
 350 };
 351
 352
 353 /**
 354  * megaraid_init - module load hook
 355  *
 356  * We register ourselves as hotplug enabled module and let PCI subsystem
 357  * discover our adapters.
 358  */
 359 static int __init
 360 megaraid_init(void)
 361 {
 362         int     rval;
 363
 364         // Announce the driver version
 365         con_log(CL_ANN, (KERN_INFO "megaraid: %s %s\n", MEGARAID_VERSION,
 366                 MEGARAID_EXT_VERSION));
 367
 368         // check validity of module parameters
 369         if (megaraid_cmd_per_lun > MBOX_MAX_SCSI_CMDS) {
 370
 371                 con_log(CL_ANN, (KERN_WARNING
 372                         "megaraid mailbox: max commands per lun reset to %d\n",
 373                         MBOX_MAX_SCSI_CMDS));
 374
 375                 megaraid_cmd_per_lun = MBOX_MAX_SCSI_CMDS;
 376         }
 377
 378
 379         // register as a PCI hot-plug driver module
 380         rval = pci_register_driver(&megaraid_pci_driver);
 381         if (rval < 0) {
 382                 con_log(CL_ANN, (KERN_WARNING
 383                         "megaraid: could not register hotplug support.\n"));
 384         }
 385
 386         return rval;
 387 }
 388
 389
 390 /**
 391  * megaraid_exit - driver unload entry point
 392  *
 393  * We simply unwrap the megaraid_init routine here.
 394  */
 395 static void __exit
 396 megaraid_exit(void)
 397 {
 398         con_log(CL_DLEVEL1, (KERN_NOTICE "megaraid: unloading framework\n"));
 399
 400         // unregister as PCI hotplug driver
 401         pci_unregister_driver(&megaraid_pci_driver);
 402
 403         return;
 404 }
 405
 406
 407 /**
 408  * megaraid_probe_one - PCI hotplug entry point
 409  * @pdev        : handle to this controller's PCI configuration space
 410  * @id          : pci device id of the class of controllers
 411  *
 412  * This routine should be called whenever a new adapter is detected by the
 413  * PCI hotplug susbsystem.
 414  */
 415 static int
 416 megaraid_probe_one(struct pci_dev *pdev, const struct pci_device_id *id)
 417 {
 418         adapter_t       *adapter;
 419
 420
 421         // detected a new controller
 422         con_log(CL_ANN, (KERN_INFO
 423                 "megaraid: probe new device %#4.04x:%#4.04x:%#4.04x:%#4.04x: ",
 424                 pdev->vendor, pdev->device, pdev->subsystem_vendor,
 425                 pdev->subsystem_device));
 426
 427         con_log(CL_ANN, ("bus %d:slot %d:func %d\n", pdev->bus->number,
 428                 PCI_SLOT(pdev->devfn), PCI_FUNC(pdev->devfn)));
 429
 430         if (pci_enable_device(pdev)) {
 431                 con_log(CL_ANN, (KERN_WARNING
 432                                 "megaraid: pci_enable_device failed\n"));
 433
 434                 return -ENODEV;
 435         }
 436
 437         // Enable bus-mastering on this controller
 438         pci_set_master(pdev);
 439
 440         // Allocate the per driver initialization structure
 441         adapter = kzalloc(sizeof(adapter_t), GFP_KERNEL);
 442
 443         if (adapter == NULL) {
 444                 con_log(CL_ANN, (KERN_WARNING
 445                 "megaraid: out of memory, %s %d.\n", __func__, __LINE__));
 446
 447                 goto out_probe_one;
 448         }
 449
 450
 451         // set up PCI related soft state and other pre-known parameters
 452         adapter->unique_id      = pdev->bus->number << 8 | pdev->devfn;
 453         adapter->irq            = pdev->irq;
 454         adapter->pdev           = pdev;
 455
 456         atomic_set(&adapter->being_detached, 0);
 457
 458         // Setup the default DMA mask. This would be changed later on
 459         // depending on hardware capabilities
 460         if (pci_set_dma_mask(adapter->pdev, DMA_BIT_MASK(32)) != 0) {
 461
 462                 con_log(CL_ANN, (KERN_WARNING
 463                         "megaraid: pci_set_dma_mask failed:%d\n", __LINE__));
 464
 465                 goto out_free_adapter;
 466         }
 467
 468
 469         // Initialize the synchronization lock for kernel and LLD
 470         spin_lock_init(&adapter->lock);
 471
 472         // Initialize the command queues: the list of free SCBs and the list
 473         // of pending SCBs.
 474         INIT_LIST_HEAD(&adapter->kscb_pool);
 475         spin_lock_init(SCSI_FREE_LIST_LOCK(adapter));
 476
 477         INIT_LIST_HEAD(&adapter->pend_list);
 478         spin_lock_init(PENDING_LIST_LOCK(adapter));
 479
 480         INIT_LIST_HEAD(&adapter->completed_list);
 481         spin_lock_init(COMPLETED_LIST_LOCK(adapter));
 482
 483
 484         // Start the mailbox based controller
 485         if (megaraid_init_mbox(adapter) != 0) {
 486                 con_log(CL_ANN, (KERN_WARNING
 487                         "megaraid: maibox adapter did not initialize\n"));
 488
 489                 goto out_free_adapter;
 490         }
 491
 492         // Register with LSI Common Management Module
 493         if (megaraid_cmm_register(adapter) != 0) {
 494
 495                 con_log(CL_ANN, (KERN_WARNING
 496                 "megaraid: could not register with management module\n"));
 497
 498                 goto out_fini_mbox;
 499         }
 500
 501         // setup adapter handle in PCI soft state
 502         pci_set_drvdata(pdev, adapter);
 503
 504         // attach with scsi mid-layer
 505         if (megaraid_io_attach(adapter) != 0) {
 506
 507                 con_log(CL_ANN, (KERN_WARNING "megaraid: io attach failed\n"));
 508
 509                 goto out_cmm_unreg;
 510         }
 511
 512         return 0;
 513
 514 out_cmm_unreg:
 515         megaraid_cmm_unregister(adapter);
 516 out_fini_mbox:
 517         megaraid_fini_mbox(adapter);
 518 out_free_adapter:
 519         kfree(adapter);
 520 out_probe_one:
 521         pci_disable_device(pdev);
 522
 523         return -ENODEV;
 524 }
 525
 526
 527 /**
 528  * megaraid_detach_one - release framework resources and call LLD release routine
 529  * @pdev        : handle for our PCI configuration space
 530  *
 531  * This routine is called during driver unload. We free all the allocated
 532  * resources and call the corresponding LLD so that it can also release all
 533  * its resources.
 534  *
 535  * This routine is also called from the PCI hotplug system.
 536  */
 537 static void
 538 megaraid_detach_one(struct pci_dev *pdev)
 539 {
 540         adapter_t               *adapter;
 541         struct Scsi_Host        *host;
 542
 543
 544         // Start a rollback on this adapter
 545         adapter = pci_get_drvdata(pdev);
 546
 547         if (!adapter) {
 548                 con_log(CL_ANN, (KERN_CRIT
 549                 "megaraid: Invalid detach on %#4.04x:%#4.04x:%#4.04x:%#4.04x\n",
 550                         pdev->vendor, pdev->device, pdev->subsystem_vendor,
 551                         pdev->subsystem_device));
 552
 553                 return;
 554         }
 555         else {
 556                 con_log(CL_ANN, (KERN_NOTICE
 557                 "megaraid: detaching device %#4.04x:%#4.04x:%#4.04x:%#4.04x\n",
 558                         pdev->vendor, pdev->device, pdev->subsystem_vendor,
 559                         pdev->subsystem_device));
 560         }
 561
 562
 563         host = adapter->host;
 564
 565         // do not allow any more requests from the management module for this
 566         // adapter.
 567         // FIXME: How do we account for the request which might still be
 568         // pending with us?
 569         atomic_set(&adapter->being_detached, 1);
 570
 571         // detach from the IO sub-system
 572         megaraid_io_detach(adapter);
 573
 574         // Unregister from common management module
 575         //
 576         // FIXME: this must return success or failure for conditions if there
 577         // is a command pending with LLD or not.
 578         megaraid_cmm_unregister(adapter);
 579
 580         // finalize the mailbox based controller and release all resources
 581         megaraid_fini_mbox(adapter);
 582
 583         kfree(adapter);
 584
 585         scsi_host_put(host);
 586
 587         pci_disable_device(pdev);
 588
 589         return;
 590 }
 591
 592
 593 /**
 594  * megaraid_mbox_shutdown - PCI shutdown for megaraid HBA
 595  * @pdev                : generic driver model device
 596  *
 597  * Shutdown notification, perform flush cache.
 598  */
 599 static void
 600 megaraid_mbox_shutdown(struct pci_dev *pdev)
 601 {
 602         adapter_t               *adapter = pci_get_drvdata(pdev);
 603         static int              counter;
 604
 605         if (!adapter) {
 606                 con_log(CL_ANN, (KERN_WARNING
 607                         "megaraid: null device in shutdown\n"));
 608                 return;
 609         }
 610
 611         // flush caches now
 612         con_log(CL_ANN, (KERN_INFO "megaraid: flushing adapter %d...",
 613                 counter++));
 614
 615         megaraid_mbox_flush_cache(adapter);
 616
 617         con_log(CL_ANN, ("done\n"));
 618 }
 619
 620
 621 /**
 622  * megaraid_io_attach - attach a device with the IO subsystem
 623  * @adapter             : controller's soft state
 624  *
 625  * Attach this device with the IO subsystem.
 626  */
 627 static int
 628 megaraid_io_attach(adapter_t *adapter)
 629 {
 630         struct Scsi_Host        *host;
 631
 632         // Initialize SCSI Host structure
 633         host = scsi_host_alloc(&megaraid_template_g, 8);
 634         if (!host) {
 635                 con_log(CL_ANN, (KERN_WARNING
 636                         "megaraid mbox: scsi_register failed\n"));
 637
 638                 return -1;
 639         }
 640
 641         SCSIHOST2ADAP(host)     = (caddr_t)adapter;
 642         adapter->host           = host;
 643
 644         host->irq               = adapter->irq;
 645         host->unique_id         = adapter->unique_id;
 646         host->can_queue         = adapter->max_cmds;
 647         host->this_id           = adapter->init_id;
 648         host->sg_tablesize      = adapter->sglen;
 649         host->max_sectors       = adapter->max_sectors;
 650         host->cmd_per_lun       = adapter->cmd_per_lun;
 651         host->max_channel       = adapter->max_channel;
 652         host->max_id            = adapter->max_target;
 653         host->max_lun           = adapter->max_lun;
 654
 655
 656         // notify mid-layer about the new controller
 657         if (scsi_add_host(host, &adapter->pdev->dev)) {
 658
 659                 con_log(CL_ANN, (KERN_WARNING
 660                         "megaraid mbox: scsi_add_host failed\n"));
 661
 662                 scsi_host_put(host);
 663
 664                 return -1;
 665         }
 666
 667         scsi_scan_host(host);
 668
 669         return 0;
 670 }
 671
 672
 673 /**
 674  * megaraid_io_detach - detach a device from the IO subsystem
 675  * @adapter             : controller's soft state
 676  *
 677  * Detach this device from the IO subsystem.
 678  */
 679 static void
 680 megaraid_io_detach(adapter_t *adapter)
 681 {
 682         struct Scsi_Host        *host;
 683
 684         con_log(CL_DLEVEL1, (KERN_INFO "megaraid: io detach\n"));
 685
 686         host = adapter->host;
 687
 688         scsi_remove_host(host);
 689
 690         return;
 691 }
 692
 693
 694 /*
 695  * START: Mailbox Low Level Driver
 696  *
 697  * This is section specific to the single mailbox based controllers
 698  */
 699
 700 /**
 701  * megaraid_init_mbox - initialize controller
 702  * @adapter             : our soft state
 703  *
 704  * - Allocate 16-byte aligned mailbox memory for firmware handshake
 705  * - Allocate controller's memory resources
 706  * - Find out all initialization data
 707  * - Allocate memory required for all the commands
 708  * - Use internal library of FW routines, build up complete soft state
 709  */
 710 static int
 711 megaraid_init_mbox(adapter_t *adapter)
 712 {
 713         struct pci_dev          *pdev;
 714         mraid_device_t          *raid_dev;
 715         int                     i;
 716         uint32_t                magic64;
 717
 718
 719         adapter->ito    = MBOX_TIMEOUT;
 720         pdev            = adapter->pdev;
 721
 722         /*
 723          * Allocate and initialize the init data structure for mailbox
 724          * controllers
 725          */
 726         raid_dev = kzalloc(sizeof(mraid_device_t), GFP_KERNEL);
 727         if (raid_dev == NULL) return -1;
 728
 729
 730         /*
 731          * Attach the adapter soft state to raid device soft state
 732          */
 733         adapter->raid_device    = (caddr_t)raid_dev;
 734         raid_dev->fast_load     = megaraid_fast_load;
 735
 736
 737         // our baseport
 738         raid_dev->baseport = pci_resource_start(pdev, 0);
 739
 740         if (pci_request_regions(pdev, "MegaRAID: LSI Logic Corporation") != 0) {
 741
 742                 con_log(CL_ANN, (KERN_WARNING
 743                                 "megaraid: mem region busy\n"));
 744
 745                 goto out_free_raid_dev;
 746         }
 747
 748         raid_dev->baseaddr = ioremap_nocache(raid_dev->baseport, 128);
 749
 750         if (!raid_dev->baseaddr) {
 751
 752                 con_log(CL_ANN, (KERN_WARNING
 753                         "megaraid: could not map hba memory\n") );
 754
 755                 goto out_release_regions;
 756         }
 757
 758         /* initialize the mutual exclusion lock for the mailbox */
 759         spin_lock_init(&raid_dev->mailbox_lock);
 760
 761         /* allocate memory required for commands */
 762         if (megaraid_alloc_cmd_packets(adapter) != 0)
 763                 goto out_iounmap;
 764
 765         /*
 766          * Issue SYNC cmd to flush the pending cmds in the adapter
 767          * and initialize its internal state
 768          */
 769
 770         if (megaraid_mbox_fire_sync_cmd(adapter))
 771                 con_log(CL_ANN, ("megaraid: sync cmd failed\n"));
 772
 773         /*
 774          * Setup the rest of the soft state using the library of
 775          * FW routines
 776          */
 777
 778         /* request IRQ and register the interrupt service routine */
 779         if (request_irq(adapter->irq, megaraid_isr, IRQF_SHARED, "megaraid",
 780                 adapter)) {
 781
 782                 con_log(CL_ANN, (KERN_WARNING
 783                         "megaraid: Couldn't register IRQ %d!\n", adapter->irq));
 784                 goto out_alloc_cmds;
 785
 786         }
 787
 788         // Product info
 789         if (megaraid_mbox_product_info(adapter) != 0)
 790                 goto out_free_irq;
 791
 792         // Do we support extended CDBs
 793         adapter->max_cdb_sz = 10;
 794         if (megaraid_mbox_extended_cdb(adapter) == 0) {
 795                 adapter->max_cdb_sz = 16;
 796         }
 797
 798         /*
 799          * Do we support cluster environment, if we do, what is the initiator
 800          * id.
 801          * NOTE: In a non-cluster aware firmware environment, the LLD should
 802          * return 7 as initiator id.
 803          */
 804         adapter->ha             = 0;
 805         adapter->init_id        = -1;
 806         if (megaraid_mbox_support_ha(adapter, &adapter->init_id) == 0) {
 807                 adapter->ha = 1;
 808         }
 809
 810         /*
 811          * Prepare the device ids array to have the mapping between the kernel
 812          * device address and megaraid device address.
 813          * We export the physical devices on their actual addresses. The
 814          * logical drives are exported on a virtual SCSI channel
 815          */
 816         megaraid_mbox_setup_device_map(adapter);
 817
 818         // If the firmware supports random deletion, update the device id map
 819         if (megaraid_mbox_support_random_del(adapter)) {
 820
 821                 // Change the logical drives numbers in device_ids array one
 822                 // slot in device_ids is reserved for target id, that's why
 823                 // "<=" below
 824                 for (i = 0; i <= MAX_LOGICAL_DRIVES_40LD; i++) {
 825                         adapter->device_ids[adapter->max_channel][i] += 0x80;
 826                 }
 827                 adapter->device_ids[adapter->max_channel][adapter->init_id] =
 828                         0xFF;
 829
 830                 raid_dev->random_del_supported = 1;
 831         }
 832
 833         /*
 834          * find out the maximum number of scatter-gather elements supported by
 835          * this firmware
 836          */
 837         adapter->sglen = megaraid_mbox_get_max_sg(adapter);
 838
 839         // enumerate RAID and SCSI channels so that all devices on SCSI
 840         // channels can later be exported, including disk devices
 841         megaraid_mbox_enum_raid_scsi(adapter);
 842
 843         /*
 844          * Other parameters required by upper layer
 845          *
 846          * maximum number of sectors per IO command
 847          */
 848         adapter->max_sectors = megaraid_max_sectors;
 849
 850         /*
 851          * number of queued commands per LUN.
 852          */
 853         adapter->cmd_per_lun = megaraid_cmd_per_lun;
 854
 855         /*
 856          * Allocate resources required to issue FW calls, when sysfs is
 857          * accessed
 858          */
 859         if (megaraid_sysfs_alloc_resources(adapter) != 0)
 860                 goto out_free_irq;
 861
 862         // Set the DMA mask to 64-bit. All supported controllers as capable of
 863         // DMA in this range
 864         pci_read_config_dword(adapter->pdev, PCI_CONF_AMISIG64, &magic64);
 865
 866         if (((magic64 == HBA_SIGNATURE_64_BIT) &&
 867                 ((adapter->pdev->subsystem_device !=
 868                 PCI_SUBSYS_ID_MEGARAID_SATA_150_6) &&
 869                 (adapter->pdev->subsystem_device !=
 870                 PCI_SUBSYS_ID_MEGARAID_SATA_150_4))) ||
 871                 (adapter->pdev->vendor == PCI_VENDOR_ID_LSI_LOGIC &&
 872                 adapter->pdev->device == PCI_DEVICE_ID_VERDE) ||
 873                 (adapter->pdev->vendor == PCI_VENDOR_ID_LSI_LOGIC &&
 874                 adapter->pdev->device == PCI_DEVICE_ID_DOBSON) ||
 875                 (adapter->pdev->vendor == PCI_VENDOR_ID_LSI_LOGIC &&
 876                 adapter->pdev->device == PCI_DEVICE_ID_LINDSAY) ||
 877                 (adapter->pdev->vendor == PCI_VENDOR_ID_DELL &&
 878                 adapter->pdev->device == PCI_DEVICE_ID_PERC4_DI_EVERGLADES) ||
 879                 (adapter->pdev->vendor == PCI_VENDOR_ID_DELL &&
 880                 adapter->pdev->device == PCI_DEVICE_ID_PERC4E_DI_KOBUK)) {
 881                 if (pci_set_dma_mask(adapter->pdev, DMA_BIT_MASK(64))) {
 882                         con_log(CL_ANN, (KERN_WARNING
 883                                 "megaraid: DMA mask for 64-bit failed\n"));
 884
 885                         if (pci_set_dma_mask (adapter->pdev, DMA_BIT_MASK(32))) {
 886                                 con_log(CL_ANN, (KERN_WARNING
 887                                         "megaraid: 32-bit DMA mask failed\n"));
 888                                 goto out_free_sysfs_res;
 889                         }
 890                 }
 891         }
 892
 893         // setup tasklet for DPC
 894         tasklet_init(&adapter->dpc_h, megaraid_mbox_dpc,
 895                         (unsigned long)adapter);
 896
 897         con_log(CL_DLEVEL1, (KERN_INFO
 898                 "megaraid mbox hba successfully initialized\n"));
 899
 900         return 0;
 901
 902 out_free_sysfs_res:
 903         megaraid_sysfs_free_resources(adapter);
 904 out_free_irq:
 905         free_irq(adapter->irq, adapter);
 906 out_alloc_cmds:
 907         megaraid_free_cmd_packets(adapter);
 908 out_iounmap:
 909         iounmap(raid_dev->baseaddr);
 910 out_release_regions:
 911         pci_release_regions(pdev);
 912 out_free_raid_dev:
 913         kfree(raid_dev);
 914
 915         return -1;
 916 }
 917
 918
 919 /**
 920  * megaraid_fini_mbox - undo controller initialization
 921  * @adapter             : our soft state
 922  */
 923 static void
 924 megaraid_fini_mbox(adapter_t *adapter)
 925 {
 926         mraid_device_t *raid_dev = ADAP2RAIDDEV(adapter);
 927
 928         // flush all caches
 929         megaraid_mbox_flush_cache(adapter);
 930
 931         tasklet_kill(&adapter->dpc_h);
 932
 933         megaraid_sysfs_free_resources(adapter);
 934
 935         megaraid_free_cmd_packets(adapter);
 936
 937         free_irq(adapter->irq, adapter);
 938
 939         iounmap(raid_dev->baseaddr);
 940
 941         pci_release_regions(adapter->pdev);
 942
 943         kfree(raid_dev);
 944
 945         return;
 946 }
 947
 948
 949 /**
 950  * megaraid_alloc_cmd_packets - allocate shared mailbox
 951  * @adapter             : soft state of the raid controller
 952  *
 953  * Allocate and align the shared mailbox. This maibox is used to issue
 954  * all the commands. For IO based controllers, the mailbox is also registered
 955  * with the FW. Allocate memory for all commands as well.
 956  * This is our big allocator.
 957  */
 958 static int
 959 megaraid_alloc_cmd_packets(adapter_t *adapter)
 960 {
 961         mraid_device_t          *raid_dev = ADAP2RAIDDEV(adapter);
 962         struct pci_dev          *pdev;
 963         unsigned long           align;
 964         scb_t                   *scb;
 965         mbox_ccb_t              *ccb;
 966         struct mraid_pci_blk    *epthru_pci_blk;
 967         struct mraid_pci_blk    *sg_pci_blk;
 968         struct mraid_pci_blk    *mbox_pci_blk;
 969         int                     i;
 970
 971         pdev = adapter->pdev;
 972
 973         /*
 974          * Setup the mailbox
 975          * Allocate the common 16-byte aligned memory for the handshake
 976          * mailbox.
 977          */
 978         raid_dev->una_mbox64 = pci_zalloc_consistent(adapter->pdev,
 979                                                      sizeof(mbox64_t),
 980                                                      &raid_dev->una_mbox64_dma);
 981
 982         if (!raid_dev->una_mbox64) {
 983                 con_log(CL_ANN, (KERN_WARNING
 984                         "megaraid: out of memory, %s %d\n", __func__,
 985                         __LINE__));
 986                 return -1;
 987         }
 988
 989         /*
 990          * Align the mailbox at 16-byte boundary
 991          */
 992         raid_dev->mbox  = &raid_dev->una_mbox64->mbox32;
 993
 994         raid_dev->mbox  = (mbox_t *)((((unsigned long)raid_dev->mbox) + 15) &
 995                                 (~0UL ^ 0xFUL));
 996
 997         raid_dev->mbox64 = (mbox64_t *)(((unsigned long)raid_dev->mbox) - 8);
 998
 999         align = ((void *)raid_dev->mbox -
1000                         ((void *)&raid_dev->una_mbox64->mbox32));
1001
1002         raid_dev->mbox_dma = (unsigned long)raid_dev->una_mbox64_dma + 8 +
1003                         align;
1004
1005         // Allocate memory for commands issued internally
1006         adapter->ibuf = pci_zalloc_consistent(pdev, MBOX_IBUF_SIZE,
1007                                               &adapter->ibuf_dma_h);
1008         if (!adapter->ibuf) {
1009
1010                 con_log(CL_ANN, (KERN_WARNING
1011                         "megaraid: out of memory, %s %d\n", __func__,
1012                         __LINE__));
1013
1014                 goto out_free_common_mbox;
1015         }
1016
1017         // Allocate memory for our SCSI Command Blocks and their associated
1018         // memory
1019
1020         /*
1021          * Allocate memory for the base list of scb. Later allocate memory for
1022          * CCBs and embedded components of each CCB and point the pointers in
1023          * scb to the allocated components
1024          * NOTE: The code to allocate SCB will be duplicated in all the LLD
1025          * since the calling routine does not yet know the number of available
1026          * commands.
1027          */
1028         adapter->kscb_list = kcalloc(MBOX_MAX_SCSI_CMDS, sizeof(scb_t), GFP_KERNEL);
1029
1030         if (adapter->kscb_list == NULL) {
1031                 con_log(CL_ANN, (KERN_WARNING
1032                         "megaraid: out of memory, %s %d\n", __func__,
1033                         __LINE__));
1034                 goto out_free_ibuf;
1035         }
1036
1037         // memory allocation for our command packets
1038         if (megaraid_mbox_setup_dma_pools(adapter) != 0) {
1039                 con_log(CL_ANN, (KERN_WARNING
1040                         "megaraid: out of memory, %s %d\n", __func__,
1041                         __LINE__));
1042                 goto out_free_scb_list;
1043         }
1044
1045         // Adjust the scb pointers and link in the free pool
1046         epthru_pci_blk  = raid_dev->epthru_pool;
1047         sg_pci_blk      = raid_dev->sg_pool;
1048         mbox_pci_blk    = raid_dev->mbox_pool;
1049
1050         for (i = 0; i < MBOX_MAX_SCSI_CMDS; i++) {
1051                 scb                     = adapter->kscb_list + i;
1052                 ccb                     = raid_dev->ccb_list + i;
1053
1054                 ccb->mbox       = (mbox_t *)(mbox_pci_blk[i].vaddr + 16);
1055                 ccb->raw_mbox   = (uint8_t *)ccb->mbox;
1056                 ccb->mbox64     = (mbox64_t *)(mbox_pci_blk[i].vaddr + 8);
1057                 ccb->mbox_dma_h = (unsigned long)mbox_pci_blk[i].dma_addr + 16;
1058
1059                 // make sure the mailbox is aligned properly
1060                 if (ccb->mbox_dma_h & 0x0F) {
1061                         con_log(CL_ANN, (KERN_CRIT
1062                                 "megaraid mbox: not aligned on 16-bytes\n"));
1063
1064                         goto out_teardown_dma_pools;
1065                 }
1066
1067                 ccb->epthru             = (mraid_epassthru_t *)
1068                                                 epthru_pci_blk[i].vaddr;
1069                 ccb->epthru_dma_h       = epthru_pci_blk[i].dma_addr;
1070                 ccb->pthru              = (mraid_passthru_t *)ccb->epthru;
1071                 ccb->pthru_dma_h        = ccb->epthru_dma_h;
1072
1073
1074                 ccb->sgl64              = (mbox_sgl64 *)sg_pci_blk[i].vaddr;
1075                 ccb->sgl_dma_h          = sg_pci_blk[i].dma_addr;
1076                 ccb->sgl32              = (mbox_sgl32 *)ccb->sgl64;
1077
1078                 scb->ccb                = (caddr_t)ccb;
1079                 scb->gp                 = 0;
1080
1081                 scb->sno                = i;    // command index
1082
1083                 scb->scp                = NULL;
1084                 scb->state              = SCB_FREE;
1085                 scb->dma_direction      = PCI_DMA_NONE;
1086                 scb->dma_type           = MRAID_DMA_NONE;
1087                 scb->dev_channel        = -1;
1088                 scb->dev_target         = -1;
1089
1090                 // put scb in the free pool
1091                 list_add_tail(&scb->list, &adapter->kscb_pool);
1092         }
1093
1094         return 0;
1095
1096 out_teardown_dma_pools:
1097         megaraid_mbox_teardown_dma_pools(adapter);
1098 out_free_scb_list:
1099         kfree(adapter->kscb_list);
1100 out_free_ibuf:
1101         pci_free_consistent(pdev, MBOX_IBUF_SIZE, (void *)adapter->ibuf,
1102                 adapter->ibuf_dma_h);
1103 out_free_common_mbox:
1104         pci_free_consistent(adapter->pdev, sizeof(mbox64_t),
1105                 (caddr_t)raid_dev->una_mbox64, raid_dev->una_mbox64_dma);
1106
1107         return -1;
1108 }
1109
1110
1111 /**
1112  * megaraid_free_cmd_packets - free memory
1113  * @adapter             : soft state of the raid controller
1114  *
1115  * Release memory resources allocated for commands.
1116  */
1117 static void
1118 megaraid_free_cmd_packets(adapter_t *adapter)
1119 {
1120         mraid_device_t *raid_dev = ADAP2RAIDDEV(adapter);
1121
1122         megaraid_mbox_teardown_dma_pools(adapter);
1123
1124         kfree(adapter->kscb_list);
1125
1126         pci_free_consistent(adapter->pdev, MBOX_IBUF_SIZE,
1127                 (void *)adapter->ibuf, adapter->ibuf_dma_h);
1128
1129         pci_free_consistent(adapter->pdev, sizeof(mbox64_t),
1130                 (caddr_t)raid_dev->una_mbox64, raid_dev->una_mbox64_dma);
1131         return;
1132 }
1133
1134
1135 /**
1136  * megaraid_mbox_setup_dma_pools - setup dma pool for command packets
1137  * @adapter             : HBA soft state
1138  *
1139  * Setup the dma pools for mailbox, passthru and extended passthru structures,
1140  * and scatter-gather lists.
1141  */
1142 static int
1143 megaraid_mbox_setup_dma_pools(adapter_t *adapter)
1144 {
1145         mraid_device_t          *raid_dev = ADAP2RAIDDEV(adapter);
1146         struct mraid_pci_blk    *epthru_pci_blk;
1147         struct mraid_pci_blk    *sg_pci_blk;
1148         struct mraid_pci_blk    *mbox_pci_blk;
1149         int                     i;
1150
1151
1152
1153         // Allocate memory for 16-bytes aligned mailboxes
1154         raid_dev->mbox_pool_handle = dma_pool_create("megaraid mbox pool",
1155                                                 &adapter->pdev->dev,
1156                                                 sizeof(mbox64_t) + 16,
1157                                                 16, 0);
1158
1159         if (raid_dev->mbox_pool_handle == NULL) {
1160                 goto fail_setup_dma_pool;
1161         }
1162
1163         mbox_pci_blk = raid_dev->mbox_pool;
1164         for (i = 0; i < MBOX_MAX_SCSI_CMDS; i++) {
1165                 mbox_pci_blk[i].vaddr = dma_pool_alloc(
1166                                                 raid_dev->mbox_pool_handle,
1167                                                 GFP_KERNEL,
1168                                                 &mbox_pci_blk[i].dma_addr);
1169                 if (!mbox_pci_blk[i].vaddr) {
1170                         goto fail_setup_dma_pool;
1171                 }
1172         }
1173
1174         /*
1175          * Allocate memory for each embedded passthru strucuture pointer
1176          * Request for a 128 bytes aligned structure for each passthru command
1177          * structure
1178          * Since passthru and extended passthru commands are exclusive, they
1179          * share common memory pool. Passthru structures piggyback on memory
1180          * allocted to extended passthru since passthru is smaller of the two
1181          */
1182         raid_dev->epthru_pool_handle = dma_pool_create("megaraid mbox pthru",
1183                         &adapter->pdev->dev, sizeof(mraid_epassthru_t), 128, 0);
1184
1185         if (raid_dev->epthru_pool_handle == NULL) {
1186                 goto fail_setup_dma_pool;
1187         }
1188
1189         epthru_pci_blk = raid_dev->epthru_pool;
1190         for (i = 0; i < MBOX_MAX_SCSI_CMDS; i++) {
1191                 epthru_pci_blk[i].vaddr = dma_pool_alloc(
1192                                                 raid_dev->epthru_pool_handle,
1193                                                 GFP_KERNEL,
1194                                                 &epthru_pci_blk[i].dma_addr);
1195                 if (!epthru_pci_blk[i].vaddr) {
1196                         goto fail_setup_dma_pool;
1197                 }
1198         }
1199
1200
1201         // Allocate memory for each scatter-gather list. Request for 512 bytes
1202         // alignment for each sg list
1203         raid_dev->sg_pool_handle = dma_pool_create("megaraid mbox sg",
1204                                         &adapter->pdev->dev,
1205                                         sizeof(mbox_sgl64) * MBOX_MAX_SG_SIZE,
1206                                         512, 0);
1207
1208         if (raid_dev->sg_pool_handle == NULL) {
1209                 goto fail_setup_dma_pool;
1210         }
1211
1212         sg_pci_blk = raid_dev->sg_pool;
1213         for (i = 0; i < MBOX_MAX_SCSI_CMDS; i++) {
1214                 sg_pci_blk[i].vaddr = dma_pool_alloc(
1215                                                 raid_dev->sg_pool_handle,
1216                                                 GFP_KERNEL,
1217                                                 &sg_pci_blk[i].dma_addr);
1218                 if (!sg_pci_blk[i].vaddr) {
1219                         goto fail_setup_dma_pool;
1220                 }
1221         }
1222
1223         return 0;
1224
1225 fail_setup_dma_pool:
1226         megaraid_mbox_teardown_dma_pools(adapter);
1227         return -1;
1228 }
1229
1230
1231 /**
1232  * megaraid_mbox_teardown_dma_pools - teardown dma pools for command packets
1233  * @adapter             : HBA soft state
1234  *
1235  * Teardown the dma pool for mailbox, passthru and extended passthru
1236  * structures, and scatter-gather lists.
1237  */
1238 static void
1239 megaraid_mbox_teardown_dma_pools(adapter_t *adapter)
1240 {
1241         mraid_device_t          *raid_dev = ADAP2RAIDDEV(adapter);
1242         struct mraid_pci_blk    *epthru_pci_blk;
1243         struct mraid_pci_blk    *sg_pci_blk;
1244         struct mraid_pci_blk    *mbox_pci_blk;
1245         int                     i;
1246
1247
1248         sg_pci_blk = raid_dev->sg_pool;
1249         for (i = 0; i < MBOX_MAX_SCSI_CMDS && sg_pci_blk[i].vaddr; i++) {
1250                 dma_pool_free(raid_dev->sg_pool_handle, sg_pci_blk[i].vaddr,
1251                         sg_pci_blk[i].dma_addr);
1252         }
1253         if (raid_dev->sg_pool_handle)
1254                 dma_pool_destroy(raid_dev->sg_pool_handle);
1255
1256
1257         epthru_pci_blk = raid_dev->epthru_pool;
1258         for (i = 0; i < MBOX_MAX_SCSI_CMDS && epthru_pci_blk[i].vaddr; i++) {
1259                 dma_pool_free(raid_dev->epthru_pool_handle,
1260                         epthru_pci_blk[i].vaddr, epthru_pci_blk[i].dma_addr);
1261         }
1262         if (raid_dev->epthru_pool_handle)
1263                 dma_pool_destroy(raid_dev->epthru_pool_handle);
1264
1265
1266         mbox_pci_blk = raid_dev->mbox_pool;
1267         for (i = 0; i < MBOX_MAX_SCSI_CMDS && mbox_pci_blk[i].vaddr; i++) {
1268                 dma_pool_free(raid_dev->mbox_pool_handle,
1269                         mbox_pci_blk[i].vaddr, mbox_pci_blk[i].dma_addr);
1270         }
1271         if (raid_dev->mbox_pool_handle)
1272                 dma_pool_destroy(raid_dev->mbox_pool_handle);
1273
1274         return;
1275 }
1276
1277
1278 /**
1279  * megaraid_alloc_scb - detach and return a scb from the free list
1280  * @adapter     : controller's soft state
1281  * @scp         : pointer to the scsi command to be executed
1282  *
1283  * Return the scb from the head of the free list. %NULL if there are none
1284  * available.
1285  */
1286 static scb_t *
1287 megaraid_alloc_scb(adapter_t *adapter, struct scsi_cmnd *scp)
1288 {
1289         struct list_head        *head = &adapter->kscb_pool;
1290         scb_t                   *scb = NULL;
1291         unsigned long           flags;
1292
1293         // detach scb from free pool
1294         spin_lock_irqsave(SCSI_FREE_LIST_LOCK(adapter), flags);
1295
1296         if (list_empty(head)) {
1297                 spin_unlock_irqrestore(SCSI_FREE_LIST_LOCK(adapter), flags);
1298                 return NULL;
1299         }
1300
1301         scb = list_entry(head->next, scb_t, list);
1302         list_del_init(&scb->list);
1303
1304         spin_unlock_irqrestore(SCSI_FREE_LIST_LOCK(adapter), flags);
1305
1306         scb->state      = SCB_ACTIVE;
1307         scb->scp        = scp;
1308         scb->dma_type   = MRAID_DMA_NONE;
1309
1310         return scb;
1311 }
1312
1313
1314 /**
1315  * megaraid_dealloc_scb - return the scb to the free pool
1316  * @adapter     : controller's soft state
1317  * @scb         : scb to be freed
1318  *
1319  * Return the scb back to the free list of scbs. The caller must 'flush' the
1320  * SCB before calling us. E.g., performing pci_unamp and/or pci_sync etc.
1321  * NOTE NOTE: Make sure the scb is not on any list before calling this
1322  * routine.
1323  */
1324 static inline void
1325 megaraid_dealloc_scb(adapter_t *adapter, scb_t *scb)
1326 {
1327         unsigned long           flags;
1328
1329         // put scb in the free pool
1330         scb->state      = SCB_FREE;
1331         scb->scp        = NULL;
1332         spin_lock_irqsave(SCSI_FREE_LIST_LOCK(adapter), flags);
1333
1334         list_add(&scb->list, &adapter->kscb_pool);
1335
1336         spin_unlock_irqrestore(SCSI_FREE_LIST_LOCK(adapter), flags);
1337
1338         return;
1339 }
1340
1341
1342 /**
1343  * megaraid_mbox_mksgl - make the scatter-gather list
1344  * @adapter     : controller's soft state
1345  * @scb         : scsi control block
1346  *
1347  * Prepare the scatter-gather list.
1348  */
1349 static int
1350 megaraid_mbox_mksgl(adapter_t *adapter, scb_t *scb)
1351 {
1352         struct scatterlist      *sgl;
1353         mbox_ccb_t              *ccb;
1354         struct scsi_cmnd        *scp;
1355         int                     sgcnt;
1356         int                     i;
1357
1358
1359         scp     = scb->scp;
1360         ccb     = (mbox_ccb_t *)scb->ccb;
1361
1362         sgcnt = scsi_dma_map(scp);
1363         BUG_ON(sgcnt < 0 || sgcnt > adapter->sglen);
1364
1365         // no mapping required if no data to be transferred
1366         if (!sgcnt)
1367                 return 0;
1368
1369         scb->dma_type = MRAID_DMA_WSG;
1370
1371         scsi_for_each_sg(scp, sgl, sgcnt, i) {
1372                 ccb->sgl64[i].address   = sg_dma_address(sgl);
1373                 ccb->sgl64[i].length    = sg_dma_len(sgl);
1374         }
1375
1376         // Return count of SG nodes
1377         return sgcnt;
1378 }
1379
1380
1381 /**
1382  * mbox_post_cmd - issue a mailbox command
1383  * @adapter     : controller's soft state
1384  * @scb         : command to be issued
1385  *
1386  * Post the command to the controller if mailbox is available.
1387  */
1388 static int
1389 mbox_post_cmd(adapter_t *adapter, scb_t *scb)
1390 {
1391         mraid_device_t  *raid_dev = ADAP2RAIDDEV(adapter);
1392         mbox64_t        *mbox64;
1393         mbox_t          *mbox;
1394         mbox_ccb_t      *ccb;
1395         unsigned long   flags;
1396         unsigned int    i = 0;
1397
1398
1399         ccb     = (mbox_ccb_t *)scb->ccb;
1400         mbox    = raid_dev->mbox;
1401         mbox64  = raid_dev->mbox64;
1402
1403         /*
1404          * Check for busy mailbox. If it is, return failure - the caller
1405          * should retry later.
1406          */
1407         spin_lock_irqsave(MAILBOX_LOCK(raid_dev), flags);
1408
1409         if (unlikely(mbox->busy)) {
1410                 do {
1411                         udelay(1);
1412                         i++;
1413                         rmb();
1414                 } while(mbox->busy && (i < max_mbox_busy_wait));
1415
1416                 if (mbox->busy) {
1417
1418                         spin_unlock_irqrestore(MAILBOX_LOCK(raid_dev), flags);
1419
1420                         return -1;
1421                 }
1422         }
1423
1424
1425         // Copy this command's mailbox data into "adapter's" mailbox
1426         memcpy((caddr_t)mbox64, (caddr_t)ccb->mbox64, 22);
1427         mbox->cmdid = scb->sno;
1428
1429         adapter->outstanding_cmds++;
1430
1431         if (scb->dma_direction == PCI_DMA_TODEVICE)
1432                 pci_dma_sync_sg_for_device(adapter->pdev,
1433                                            scsi_sglist(scb->scp),
1434                                            scsi_sg_count(scb->scp),
1435                                            PCI_DMA_TODEVICE);
1436
1437         mbox->busy      = 1;    // Set busy
1438         mbox->poll      = 0;
1439         mbox->ack       = 0;
1440         wmb();
1441
1442         WRINDOOR(raid_dev, raid_dev->mbox_dma | 0x1);
1443
1444         spin_unlock_irqrestore(MAILBOX_LOCK(raid_dev), flags);
1445
1446         return 0;
1447 }
1448
1449
1450 /**
1451  * megaraid_queue_command - generic queue entry point for all LLDs
1452  * @scp         : pointer to the scsi command to be executed
1453  * @done        : callback routine to be called after the cmd has be completed
1454  *
1455  * Queue entry point for mailbox based controllers.
1456  */
1457 static int
1458 megaraid_queue_command_lck(struct scsi_cmnd *scp, void (*done)(struct scsi_cmnd *))
1459 {
1460         adapter_t       *adapter;
1461         scb_t           *scb;
1462         int             if_busy;
1463
1464         adapter         = SCP2ADAPTER(scp);
1465         scp->scsi_done  = done;
1466         scp->result     = 0;
1467
1468         /*
1469          * Allocate and build a SCB request
1470          * if_busy flag will be set if megaraid_mbox_build_cmd() command could
1471          * not allocate scb. We will return non-zero status in that case.
1472          * NOTE: scb can be null even though certain commands completed
1473          * successfully, e.g., MODE_SENSE and TEST_UNIT_READY, it would
1474          * return 0 in that case, and we would do the callback right away.
1475          */
1476         if_busy = 0;
1477         scb = megaraid_mbox_build_cmd(adapter, scp, &if_busy);
1478         if (!scb) {     // command already completed
1479                 done(scp);
1480                 return 0;
1481         }
1482
1483         megaraid_mbox_runpendq(adapter, scb);
1484         return if_busy;
1485 }
1486
1487 static DEF_SCSI_QCMD(megaraid_queue_command)
1488
1489 /**
1490  * megaraid_mbox_build_cmd - transform the mid-layer scsi commands
1491  * @adapter     : controller's soft state
1492  * @scp         : mid-layer scsi command pointer
1493  * @busy        : set if request could not be completed because of lack of
1494  *              resources
1495  *
1496  * Transform the mid-layer scsi command to megaraid firmware lingua.
1497  * Convert the command issued by mid-layer to format understood by megaraid
1498  * firmware. We also complete certain commands without sending them to firmware.
1499  */
1500 static scb_t *
1501 megaraid_mbox_build_cmd(adapter_t *adapter, struct scsi_cmnd *scp, int *busy)
1502 {
1503         mraid_device_t          *rdev = ADAP2RAIDDEV(adapter);
1504         int                     channel;
1505         int                     target;
1506         int                     islogical;
1507         mbox_ccb_t              *ccb;
1508         mraid_passthru_t        *pthru;
1509         mbox64_t                *mbox64;
1510         mbox_t                  *mbox;
1511         scb_t                   *scb;
1512         char                    skip[] = "skipping";
1513         char                    scan[] = "scanning";
1514         char                    *ss;
1515
1516
1517         /*
1518          * Get the appropriate device map for the device this command is
1519          * intended for
1520          */
1521         MRAID_GET_DEVICE_MAP(adapter, scp, channel, target, islogical);
1522
1523         /*
1524          * Logical drive commands
1525          */
1526         if (islogical) {
1527                 switch (scp->cmnd[0]) {
1528                 case TEST_UNIT_READY:
1529                         /*
1530                          * Do we support clustering and is the support enabled
1531                          * If no, return success always
1532                          */
1533                         if (!adapter->ha) {
1534                                 scp->result = (DID_OK << 16);
1535                                 return NULL;
1536                         }
1537
1538                         if (!(scb = megaraid_alloc_scb(adapter, scp))) {
1539                                 scp->result = (DID_ERROR << 16);
1540                                 *busy = 1;
1541                                 return NULL;
1542                         }
1543
1544                         scb->dma_direction      = scp->sc_data_direction;
1545                         scb->dev_channel        = 0xFF;
1546                         scb->dev_target         = target;
1547                         ccb                     = (mbox_ccb_t *)scb->ccb;
1548
1549                         /*
1550                          * The command id will be provided by the command
1551                          * issuance routine
1552                          */
1553                         ccb->raw_mbox[0]        = CLUSTER_CMD;
1554                         ccb->raw_mbox[2]        = RESERVATION_STATUS;
1555                         ccb->raw_mbox[3]        = target;
1556
1557                         return scb;
1558
1559                 case MODE_SENSE:
1560                 {
1561                         struct scatterlist      *sgl;
1562                         caddr_t                 vaddr;
1563
1564                         sgl = scsi_sglist(scp);
1565                         if (sg_page(sgl)) {
1566                                 vaddr = (caddr_t) sg_virt(&sgl[0]);
1567
1568                                 memset(vaddr, 0, scp->cmnd[4]);
1569                         }
1570                         else {
1571                                 con_log(CL_ANN, (KERN_WARNING
1572                                                  "megaraid mailbox: invalid sg:%d\n",
1573                                                  __LINE__));
1574                         }
1575                 }
1576                 scp->result = (DID_OK << 16);
1577                 return NULL;
1578
1579                 case INQUIRY:
1580                         /*
1581                          * Display the channel scan for logical drives
1582                          * Do not display scan for a channel if already done.
1583                          */
1584                         if (!(rdev->last_disp & (1L << SCP2CHANNEL(scp)))) {
1585
1586                                 con_log(CL_ANN, (KERN_INFO
1587                                         "scsi[%d]: scanning scsi channel %d",
1588                                         adapter->host->host_no,
1589                                         SCP2CHANNEL(scp)));
1590
1591                                 con_log(CL_ANN, (
1592                                         " [virtual] for logical drives\n"));
1593
1594                                 rdev->last_disp |= (1L << SCP2CHANNEL(scp));
1595                         }
1596
1597                         if (scp->cmnd[1] & MEGA_SCSI_INQ_EVPD) {
1598                                 scp->sense_buffer[0] = 0x70;
1599                                 scp->sense_buffer[2] = ILLEGAL_REQUEST;
1600                                 scp->sense_buffer[12] = MEGA_INVALID_FIELD_IN_CDB;
1601                                 scp->result = CHECK_CONDITION << 1;
1602                                 return NULL;
1603                         }
1604
1605                         /* Fall through */
1606
1607                 case READ_CAPACITY:
1608                         /*
1609                          * Do not allow LUN > 0 for logical drives and
1610                          * requests for more than 40 logical drives
1611                          */
1612                         if (SCP2LUN(scp)) {
1613                                 scp->result = (DID_BAD_TARGET << 16);
1614                                 return NULL;
1615                         }
1616                         if ((target % 0x80) >= MAX_LOGICAL_DRIVES_40LD) {
1617                                 scp->result = (DID_BAD_TARGET << 16);
1618                                 return NULL;
1619                         }
1620
1621
1622                         /* Allocate a SCB and initialize passthru */
1623                         if (!(scb = megaraid_alloc_scb(adapter, scp))) {
1624                                 scp->result = (DID_ERROR << 16);
1625                                 *busy = 1;
1626                                 return NULL;
1627                         }
1628
1629                         ccb                     = (mbox_ccb_t *)scb->ccb;
1630                         scb->dev_channel        = 0xFF;
1631                         scb->dev_target         = target;
1632                         pthru                   = ccb->pthru;
1633                         mbox                    = ccb->mbox;
1634                         mbox64                  = ccb->mbox64;
1635
1636                         pthru->timeout          = 0;
1637                         pthru->ars              = 1;
1638                         pthru->reqsenselen      = 14;
1639                         pthru->islogical        = 1;
1640                         pthru->logdrv           = target;
1641                         pthru->cdblen           = scp->cmd_len;
1642                         memcpy(pthru->cdb, scp->cmnd, scp->cmd_len);
1643
1644                         mbox->cmd               = MBOXCMD_PASSTHRU64;
1645                         scb->dma_direction      = scp->sc_data_direction;
1646
1647                         pthru->dataxferlen      = scsi_bufflen(scp);
1648                         pthru->dataxferaddr     = ccb->sgl_dma_h;
1649                         pthru->numsge           = megaraid_mbox_mksgl(adapter,
1650                                                         scb);
1651
1652                         mbox->xferaddr          = 0xFFFFFFFF;
1653                         mbox64->xferaddr_lo     = (uint32_t )ccb->pthru_dma_h;
1654                         mbox64->xferaddr_hi     = 0;
1655
1656                         return scb;
1657
1658                 case READ_6:
1659                 case WRITE_6:
1660                 case READ_10:
1661                 case WRITE_10:
1662                 case READ_12:
1663                 case WRITE_12:
1664
1665                         /*
1666                          * Allocate a SCB and initialize mailbox
1667                          */
1668                         if (!(scb = megaraid_alloc_scb(adapter, scp))) {
1669                                 scp->result = (DID_ERROR << 16);
1670                                 *busy = 1;
1671                                 return NULL;
1672                         }
1673                         ccb                     = (mbox_ccb_t *)scb->ccb;
1674                         scb->dev_channel        = 0xFF;
1675                         scb->dev_target         = target;
1676                         mbox                    = ccb->mbox;
1677                         mbox64                  = ccb->mbox64;
1678                         mbox->logdrv            = target;
1679
1680                         /*
1681                          * A little HACK: 2nd bit is zero for all scsi read
1682                          * commands and is set for all scsi write commands
1683                          */
1684                         mbox->cmd = (scp->cmnd[0] & 0x02) ?  MBOXCMD_LWRITE64:
1685                                         MBOXCMD_LREAD64 ;
1686
1687                         /*
1688                          * 6-byte READ(0x08) or WRITE(0x0A) cdb
1689                          */
1690                         if (scp->cmd_len == 6) {
1691                                 mbox->numsectors = (uint32_t)scp->cmnd[4];
1692                                 mbox->lba =
1693                                         ((uint32_t)scp->cmnd[1] << 16)  |
1694                                         ((uint32_t)scp->cmnd[2] << 8)   |
1695                                         (uint32_t)scp->cmnd[3];
1696
1697                                 mbox->lba &= 0x1FFFFF;
1698                         }
1699
1700                         /*
1701                          * 10-byte READ(0x28) or WRITE(0x2A) cdb
1702                          */
1703                         else if (scp->cmd_len == 10) {
1704                                 mbox->numsectors =
1705                                         (uint32_t)scp->cmnd[8] |
1706                                         ((uint32_t)scp->cmnd[7] << 8);
1707                                 mbox->lba =
1708                                         ((uint32_t)scp->cmnd[2] << 24) |
1709                                         ((uint32_t)scp->cmnd[3] << 16) |
1710                                         ((uint32_t)scp->cmnd[4] << 8) |
1711                                         (uint32_t)scp->cmnd[5];
1712                         }
1713
1714                         /*
1715                          * 12-byte READ(0xA8) or WRITE(0xAA) cdb
1716                          */
1717                         else if (scp->cmd_len == 12) {
1718                                 mbox->lba =
1719                                         ((uint32_t)scp->cmnd[2] << 24) |
1720                                         ((uint32_t)scp->cmnd[3] << 16) |
1721                                         ((uint32_t)scp->cmnd[4] << 8) |
1722                                         (uint32_t)scp->cmnd[5];
1723
1724                                 mbox->numsectors =
1725                                         ((uint32_t)scp->cmnd[6] << 24) |
1726                                         ((uint32_t)scp->cmnd[7] << 16) |
1727                                         ((uint32_t)scp->cmnd[8] << 8) |
1728                                         (uint32_t)scp->cmnd[9];
1729                         }
1730                         else {
1731                                 con_log(CL_ANN, (KERN_WARNING
1732                                         "megaraid: unsupported CDB length\n"));
1733
1734                                 megaraid_dealloc_scb(adapter, scb);
1735
1736                                 scp->result = (DID_ERROR << 16);
1737                                 return NULL;
1738                         }
1739
1740                         scb->dma_direction = scp->sc_data_direction;
1741
1742                         // Calculate Scatter-Gather info
1743                         mbox64->xferaddr_lo     = (uint32_t )ccb->sgl_dma_h;
1744                         mbox->numsge            = megaraid_mbox_mksgl(adapter,
1745                                                         scb);
1746                         mbox->xferaddr          = 0xFFFFFFFF;
1747                         mbox64->xferaddr_hi     = 0;
1748
1749                         return scb;
1750
1751                 case RESERVE:
1752                 case RELEASE:
1753                         /*
1754                          * Do we support clustering and is the support enabled
1755                          */
1756                         if (!adapter->ha) {
1757                                 scp->result = (DID_BAD_TARGET << 16);
1758                                 return NULL;
1759                         }
1760
1761                         /*
1762                          * Allocate a SCB and initialize mailbox
1763                          */
1764                         if (!(scb = megaraid_alloc_scb(adapter, scp))) {
1765                                 scp->result = (DID_ERROR << 16);
1766                                 *busy = 1;
1767                                 return NULL;
1768                         }
1769
1770                         ccb                     = (mbox_ccb_t *)scb->ccb;
1771                         scb->dev_channel        = 0xFF;
1772                         scb->dev_target         = target;
1773                         ccb->raw_mbox[0]        = CLUSTER_CMD;
1774                         ccb->raw_mbox[2]        =  (scp->cmnd[0] == RESERVE) ?
1775                                                 RESERVE_LD : RELEASE_LD;
1776
1777                         ccb->raw_mbox[3]        = target;
1778                         scb->dma_direction      = scp->sc_data_direction;
1779
1780                         return scb;
1781
1782                 default:
1783                         scp->result = (DID_BAD_TARGET << 16);
1784                         return NULL;
1785                 }
1786         }
1787         else { // Passthru device commands
1788
1789                 // Do not allow access to target id > 15 or LUN > 7
1790                 if (target > 15 || SCP2LUN(scp) > 7) {
1791                         scp->result = (DID_BAD_TARGET << 16);
1792                         return NULL;
1793                 }
1794
1795                 // if fast load option was set and scan for last device is
1796                 // over, reset the fast_load flag so that during a possible
1797                 // next scan, devices can be made available
1798                 if (rdev->fast_load && (target == 15) &&
1799                         (SCP2CHANNEL(scp) == adapter->max_channel -1)) {
1800
1801                         con_log(CL_ANN, (KERN_INFO
1802                         "megaraid[%d]: physical device scan re-enabled\n",
1803                                 adapter->host->host_no));
1804                         rdev->fast_load = 0;
1805                 }
1806
1807                 /*
1808                  * Display the channel scan for physical devices
1809                  */
1810                 if (!(rdev->last_disp & (1L << SCP2CHANNEL(scp)))) {
1811
1812                         ss = rdev->fast_load ? skip : scan;
1813
1814                         con_log(CL_ANN, (KERN_INFO
1815                                 "scsi[%d]: %s scsi channel %d [Phy %d]",
1816                                 adapter->host->host_no, ss, SCP2CHANNEL(scp),
1817                                 channel));
1818
1819                         con_log(CL_ANN, (
1820                                 " for non-raid devices\n"));
1821
1822                         rdev->last_disp |= (1L << SCP2CHANNEL(scp));
1823                 }
1824
1825                 // disable channel sweep if fast load option given
1826                 if (rdev->fast_load) {
1827                         scp->result = (DID_BAD_TARGET << 16);
1828                         return NULL;
1829                 }
1830
1831                 // Allocate a SCB and initialize passthru
1832                 if (!(scb = megaraid_alloc_scb(adapter, scp))) {
1833                         scp->result = (DID_ERROR << 16);
1834                         *busy = 1;
1835                         return NULL;
1836                 }
1837
1838                 ccb                     = (mbox_ccb_t *)scb->ccb;
1839                 scb->dev_channel        = channel;
1840                 scb->dev_target         = target;
1841                 scb->dma_direction      = scp->sc_data_direction;
1842                 mbox                    = ccb->mbox;
1843                 mbox64                  = ccb->mbox64;
1844
1845                 // Does this firmware support extended CDBs
1846                 if (adapter->max_cdb_sz == 16) {
1847                         mbox->cmd               = MBOXCMD_EXTPTHRU;
1848
1849                         megaraid_mbox_prepare_epthru(adapter, scb, scp);
1850
1851                         mbox64->xferaddr_lo     = (uint32_t)ccb->epthru_dma_h;
1852                         mbox64->xferaddr_hi     = 0;
1853                         mbox->xferaddr          = 0xFFFFFFFF;
1854                 }
1855                 else {
1856                         mbox->cmd = MBOXCMD_PASSTHRU64;
1857
1858                         megaraid_mbox_prepare_pthru(adapter, scb, scp);
1859
1860                         mbox64->xferaddr_lo     = (uint32_t)ccb->pthru_dma_h;
1861                         mbox64->xferaddr_hi     = 0;
1862                         mbox->xferaddr          = 0xFFFFFFFF;
1863                 }
1864                 return scb;
1865         }
1866
1867         // NOT REACHED
1868 }
1869
1870
1871 /**
1872  * megaraid_mbox_runpendq - execute commands queued in the pending queue
1873  * @adapter     : controller's soft state
1874  * @scb_q       : SCB to be queued in the pending list
1875  *
1876  * Scan the pending list for commands which are not yet issued and try to
1877  * post to the controller. The SCB can be a null pointer, which would indicate
1878  * no SCB to be queue, just try to execute the ones in the pending list.
1879  *
1880  * NOTE: We do not actually traverse the pending list. The SCBs are plucked
1881  * out from the head of the pending list. If it is successfully issued, the
1882  * next SCB is at the head now.
1883  */
1884 static void
1885 megaraid_mbox_runpendq(adapter_t *adapter, scb_t *scb_q)
1886 {
1887         scb_t                   *scb;
1888         unsigned long           flags;
1889
1890         spin_lock_irqsave(PENDING_LIST_LOCK(adapter), flags);
1891
1892         if (scb_q) {
1893                 scb_q->state = SCB_PENDQ;
1894                 list_add_tail(&scb_q->list, &adapter->pend_list);
1895         }
1896
1897         // if the adapter in not in quiescent mode, post the commands to FW
1898         if (adapter->quiescent) {
1899                 spin_unlock_irqrestore(PENDING_LIST_LOCK(adapter), flags);
1900                 return;
1901         }
1902
1903         while (!list_empty(&adapter->pend_list)) {
1904
1905                 assert_spin_locked(PENDING_LIST_LOCK(adapter));
1906
1907                 scb = list_entry(adapter->pend_list.next, scb_t, list);
1908
1909                 // remove the scb from the pending list and try to
1910                 // issue. If we are unable to issue it, put back in
1911                 // the pending list and return
1912
1913                 list_del_init(&scb->list);
1914
1915                 spin_unlock_irqrestore(PENDING_LIST_LOCK(adapter), flags);
1916
1917                 // if mailbox was busy, return SCB back to pending
1918                 // list. Make sure to add at the head, since that's
1919                 // where it would have been removed from
1920
1921                 scb->state = SCB_ISSUED;
1922
1923                 if (mbox_post_cmd(adapter, scb) != 0) {
1924
1925                         spin_lock_irqsave(PENDING_LIST_LOCK(adapter), flags);
1926
1927                         scb->state = SCB_PENDQ;
1928
1929                         list_add(&scb->list, &adapter->pend_list);
1930
1931                         spin_unlock_irqrestore(PENDING_LIST_LOCK(adapter),
1932                                 flags);
1933
1934                         return;
1935                 }
1936
1937                 spin_lock_irqsave(PENDING_LIST_LOCK(adapter), flags);
1938         }
1939
1940         spin_unlock_irqrestore(PENDING_LIST_LOCK(adapter), flags);
1941
1942
1943         return;
1944 }
1945
1946
1947 /**
1948  * megaraid_mbox_prepare_pthru - prepare a command for physical devices
1949  * @adapter     : pointer to controller's soft state
1950  * @scb         : scsi control block
1951  * @scp         : scsi command from the mid-layer
1952  *
1953  * Prepare a command for the scsi physical devices.
1954  */
1955 static void
1956 megaraid_mbox_prepare_pthru(adapter_t *adapter, scb_t *scb,
1957                 struct scsi_cmnd *scp)
1958 {
1959         mbox_ccb_t              *ccb;
1960         mraid_passthru_t        *pthru;
1961         uint8_t                 channel;
1962         uint8_t                 target;
1963
1964         ccb     = (mbox_ccb_t *)scb->ccb;
1965         pthru   = ccb->pthru;
1966         channel = scb->dev_channel;
1967         target  = scb->dev_target;
1968
1969         // 0=6sec, 1=60sec, 2=10min, 3=3hrs, 4=NO timeout
1970         pthru->timeout          = 4;
1971         pthru->ars              = 1;
1972         pthru->islogical        = 0;
1973         pthru->channel          = 0;
1974         pthru->target           = (channel << 4) | target;
1975         pthru->logdrv           = SCP2LUN(scp);
1976         pthru->reqsenselen      = 14;
1977         pthru->cdblen           = scp->cmd_len;
1978
1979         memcpy(pthru->cdb, scp->cmnd, scp->cmd_len);
1980
1981         if (scsi_bufflen(scp)) {
1982                 pthru->dataxferlen      = scsi_bufflen(scp);
1983                 pthru->dataxferaddr     = ccb->sgl_dma_h;
1984                 pthru->numsge           = megaraid_mbox_mksgl(adapter, scb);
1985         }
1986         else {
1987                 pthru->dataxferaddr     = 0;
1988                 pthru->dataxferlen      = 0;
1989                 pthru->numsge           = 0;
1990         }
1991         return;
1992 }
1993
1994
1995 /**
1996  * megaraid_mbox_prepare_epthru - prepare a command for physical devices
1997  * @adapter     : pointer to controller's soft state
1998  * @scb         : scsi control block
1999  * @scp         : scsi command from the mid-layer
2000  *
2001  * Prepare a command for the scsi physical devices. This routine prepares
2002  * commands for devices which can take extended CDBs (>10 bytes).
2003  */
2004 static void
2005 megaraid_mbox_prepare_epthru(adapter_t *adapter, scb_t *scb,
2006                 struct scsi_cmnd *scp)
2007 {
2008         mbox_ccb_t              *ccb;
2009         mraid_epassthru_t       *epthru;
2010         uint8_t                 channel;
2011         uint8_t                 target;
2012
2013         ccb     = (mbox_ccb_t *)scb->ccb;
2014         epthru  = ccb->epthru;
2015         channel = scb->dev_channel;
2016         target  = scb->dev_target;
2017
2018         // 0=6sec, 1=60sec, 2=10min, 3=3hrs, 4=NO timeout
2019         epthru->timeout         = 4;
2020         epthru->ars             = 1;
2021         epthru->islogical       = 0;
2022         epthru->channel         = 0;
2023         epthru->target          = (channel << 4) | target;
2024         epthru->logdrv          = SCP2LUN(scp);
2025         epthru->reqsenselen     = 14;
2026         epthru->cdblen          = scp->cmd_len;
2027
2028         memcpy(epthru->cdb, scp->cmnd, scp->cmd_len);
2029
2030         if (scsi_bufflen(scp)) {
2031                 epthru->dataxferlen     = scsi_bufflen(scp);
2032                 epthru->dataxferaddr    = ccb->sgl_dma_h;
2033                 epthru->numsge          = megaraid_mbox_mksgl(adapter, scb);
2034         }
2035         else {
2036                 epthru->dataxferaddr    = 0;
2037                 epthru->dataxferlen     = 0;
2038                 epthru->numsge          = 0;
2039         }
2040         return;
2041 }
2042
2043
2044 /**
2045  * megaraid_ack_sequence - interrupt ack sequence for memory mapped HBAs
2046  * @adapter     : controller's soft state
2047  *
2048  * Interrupt acknowledgement sequence for memory mapped HBAs. Find out the
2049  * completed command and put them on the completed list for later processing.
2050  *
2051  * Returns:     1 if the interrupt is valid, 0 otherwise
2052  */
2053 static int
2054 megaraid_ack_sequence(adapter_t *adapter)
2055 {
2056         mraid_device_t          *raid_dev = ADAP2RAIDDEV(adapter);
2057         mbox_t                  *mbox;
2058         scb_t                   *scb;
2059         uint8_t                 nstatus;
2060         uint8_t                 completed[MBOX_MAX_FIRMWARE_STATUS];
2061         struct list_head        clist;
2062         int                     handled;
2063         uint32_t                dword;
2064         unsigned long           flags;
2065         int                     i, j;
2066
2067
2068         mbox    = raid_dev->mbox;
2069
2070         // move the SCBs from the firmware completed array to our local list
2071         INIT_LIST_HEAD(&clist);
2072
2073         // loop till F/W has more commands for us to complete
2074         handled = 0;
2075         spin_lock_irqsave(MAILBOX_LOCK(raid_dev), flags);
2076         do {
2077                 /*
2078                  * Check if a valid interrupt is pending. If found, force the
2079                  * interrupt line low.
2080                  */
2081                 dword = RDOUTDOOR(raid_dev);
2082                 if (dword != 0x10001234) break;
2083
2084                 handled = 1;
2085
2086                 WROUTDOOR(raid_dev, 0x10001234);
2087
2088                 nstatus = 0;
2089                 // wait for valid numstatus to post
2090                 for (i = 0; i < 0xFFFFF; i++) {
2091                         if (mbox->numstatus != 0xFF) {
2092                                 nstatus = mbox->numstatus;
2093                                 break;
2094                         }
2095                         rmb();
2096                 }
2097                 mbox->numstatus = 0xFF;
2098
2099                 adapter->outstanding_cmds -= nstatus;
2100
2101                 for (i = 0; i < nstatus; i++) {
2102
2103                         // wait for valid command index to post
2104                         for (j = 0; j < 0xFFFFF; j++) {
2105                                 if (mbox->completed[i] != 0xFF) break;
2106                                 rmb();
2107                         }
2108                         completed[i]            = mbox->completed[i];
2109                         mbox->completed[i]      = 0xFF;
2110
2111                         if (completed[i] == 0xFF) {
2112                                 con_log(CL_ANN, (KERN_CRIT
2113                                 "megaraid: command posting timed out\n"));
2114
2115                                 BUG();
2116                                 continue;
2117                         }
2118
2119                         // Get SCB associated with this command id
2120                         if (completed[i] >= MBOX_MAX_SCSI_CMDS) {
2121                                 // a cmm command
2122                                 scb = adapter->uscb_list + (completed[i] -
2123                                                 MBOX_MAX_SCSI_CMDS);
2124                         }
2125                         else {
2126                                 // an os command
2127                                 scb = adapter->kscb_list + completed[i];
2128                         }
2129
2130                         scb->status = mbox->status;
2131                         list_add_tail(&scb->list, &clist);
2132                 }
2133
2134                 // Acknowledge interrupt
2135                 WRINDOOR(raid_dev, 0x02);
2136
2137         } while(1);
2138
2139         spin_unlock_irqrestore(MAILBOX_LOCK(raid_dev), flags);
2140
2141
2142         // put the completed commands in the completed list. DPC would
2143         // complete these commands later
2144         spin_lock_irqsave(COMPLETED_LIST_LOCK(adapter), flags);
2145
2146         list_splice(&clist, &adapter->completed_list);
2147
2148         spin_unlock_irqrestore(COMPLETED_LIST_LOCK(adapter), flags);
2149
2150
2151         // schedule the DPC if there is some work for it
2152         if (handled)
2153                 tasklet_schedule(&adapter->dpc_h);
2154
2155         return handled;
2156 }
2157
2158
2159 /**
2160  * megaraid_isr - isr for memory based mailbox based controllers
2161  * @irq         : irq
2162  * @devp        : pointer to our soft state
2163  *
2164  * Interrupt service routine for memory-mapped mailbox controllers.
2165  */
2166 static irqreturn_t
2167 megaraid_isr(int irq, void *devp)
2168 {
2169         adapter_t       *adapter = devp;
2170         int             handled;
2171
2172         handled = megaraid_ack_sequence(adapter);
2173
2174         /* Loop through any pending requests */
2175         if (!adapter->quiescent) {
2176                 megaraid_mbox_runpendq(adapter, NULL);
2177         }
2178
2179         return IRQ_RETVAL(handled);
2180 }
2181
2182
2183 /**
2184  * megaraid_mbox_sync_scb - sync kernel buffers
2185  * @adapter     : controller's soft state
2186  * @scb         : pointer to the resource packet
2187  *
2188  * DMA sync if required.
2189  */
2190 static void
2191 megaraid_mbox_sync_scb(adapter_t *adapter, scb_t *scb)
2192 {
2193         mbox_ccb_t      *ccb;
2194
2195         ccb     = (mbox_ccb_t *)scb->ccb;
2196
2197         if (scb->dma_direction == PCI_DMA_FROMDEVICE)
2198                 pci_dma_sync_sg_for_cpu(adapter->pdev,
2199                                         scsi_sglist(scb->scp),
2200                                         scsi_sg_count(scb->scp),
2201                                         PCI_DMA_FROMDEVICE);
2202
2203         scsi_dma_unmap(scb->scp);
2204         return;
2205 }
2206
2207
2208 /**
2209  * megaraid_mbox_dpc - the tasklet to complete the commands from completed list
2210  * @devp        : pointer to HBA soft state
2211  *
2212  * Pick up the commands from the completed list and send back to the owners.
2213  * This is a reentrant function and does not assume any locks are held while
2214  * it is being called.
2215  */
2216 static void
2217 megaraid_mbox_dpc(unsigned long devp)
2218 {
2219         adapter_t               *adapter = (adapter_t *)devp;
2220         mraid_device_t          *raid_dev;
2221         struct list_head        clist;
2222         struct scatterlist      *sgl;
2223         scb_t                   *scb;
2224         scb_t                   *tmp;
2225         struct scsi_cmnd        *scp;
2226         mraid_passthru_t        *pthru;
2227         mraid_epassthru_t       *epthru;
2228         mbox_ccb_t              *ccb;
2229         int                     islogical;
2230         int                     pdev_index;
2231         int                     pdev_state;
2232         mbox_t                  *mbox;
2233         unsigned long           flags;
2234         uint8_t                 c;
2235         int                     status;
2236         uioc_t                  *kioc;
2237
2238
2239         if (!adapter) return;
2240
2241         raid_dev = ADAP2RAIDDEV(adapter);
2242
2243         // move the SCBs from the completed list to our local list
2244         INIT_LIST_HEAD(&clist);
2245
2246         spin_lock_irqsave(COMPLETED_LIST_LOCK(adapter), flags);
2247
2248         list_splice_init(&adapter->completed_list, &clist);
2249
2250         spin_unlock_irqrestore(COMPLETED_LIST_LOCK(adapter), flags);
2251
2252
2253         list_for_each_entry_safe(scb, tmp, &clist, list) {
2254
2255                 status          = scb->status;
2256                 scp             = scb->scp;
2257                 ccb             = (mbox_ccb_t *)scb->ccb;
2258                 pthru           = ccb->pthru;
2259                 epthru          = ccb->epthru;
2260                 mbox            = ccb->mbox;
2261
2262                 // Make sure f/w has completed a valid command
2263                 if (scb->state != SCB_ISSUED) {
2264                         con_log(CL_ANN, (KERN_CRIT
2265                         "megaraid critical err: invalid command %d:%d:%p\n",
2266                                 scb->sno, scb->state, scp));
2267                         BUG();
2268                         continue;       // Must never happen!
2269                 }
2270
2271                 // check for the management command and complete it right away
2272                 if (scb->sno >= MBOX_MAX_SCSI_CMDS) {
2273                         scb->state      = SCB_FREE;
2274                         scb->status     = status;
2275
2276                         // remove from local clist
2277                         list_del_init(&scb->list);
2278
2279                         kioc                    = (uioc_t *)scb->gp;
2280                         kioc->status            = 0;
2281
2282                         megaraid_mbox_mm_done(adapter, scb);
2283
2284                         continue;
2285                 }
2286
2287                 // Was an abort issued for this command earlier
2288                 if (scb->state & SCB_ABORT) {
2289                         con_log(CL_ANN, (KERN_NOTICE
2290                         "megaraid: aborted cmd [%x] completed\n",
2291                                 scb->sno));
2292                 }
2293
2294                 /*
2295                  * If the inquiry came of a disk drive which is not part of
2296                  * any RAID array, expose it to the kernel. For this to be
2297                  * enabled, user must set the "megaraid_expose_unconf_disks"
2298                  * flag to 1 by specifying it on module parameter list.
2299                  * This would enable data migration off drives from other
2300                  * configurations.
2301                  */
2302                 islogical = MRAID_IS_LOGICAL(adapter, scp);
2303                 if (scp->cmnd[0] == INQUIRY && status == 0 && islogical == 0
2304                                 && IS_RAID_CH(raid_dev, scb->dev_channel)) {
2305
2306                         sgl = scsi_sglist(scp);
2307                         if (sg_page(sgl)) {
2308                                 c = *(unsigned char *) sg_virt(&sgl[0]);
2309                         } else {
2310                                 con_log(CL_ANN, (KERN_WARNING
2311                                                  "megaraid mailbox: invalid sg:%d\n",
2312                                                  __LINE__));
2313                                 c = 0;
2314                         }
2315
2316                         if ((c & 0x1F ) == TYPE_DISK) {
2317                                 pdev_index = (scb->dev_channel * 16) +
2318                                         scb->dev_target;
2319                                 pdev_state =
2320                                         raid_dev->pdrv_state[pdev_index] & 0x0F;
2321
2322                                 if (pdev_state == PDRV_ONLINE           ||
2323                                         pdev_state == PDRV_FAILED       ||
2324                                         pdev_state == PDRV_RBLD         ||
2325                                         pdev_state == PDRV_HOTSPARE     ||
2326                                         megaraid_expose_unconf_disks == 0) {
2327
2328                                         status = 0xF0;
2329                                 }
2330                         }
2331                 }
2332
2333                 // Convert MegaRAID status to Linux error code
2334                 switch (status) {
2335
2336                 case 0x00:
2337
2338                         scp->result = (DID_OK << 16);
2339                         break;
2340
2341                 case 0x02:
2342
2343                         /* set sense_buffer and result fields */
2344                         if (mbox->cmd == MBOXCMD_PASSTHRU ||
2345                                 mbox->cmd == MBOXCMD_PASSTHRU64) {
2346
2347                                 memcpy(scp->sense_buffer, pthru->reqsensearea,
2348                                                 14);
2349
2350                                 scp->result = DRIVER_SENSE << 24 |
2351                                         DID_OK << 16 | CHECK_CONDITION << 1;
2352                         }
2353                         else {
2354                                 if (mbox->cmd == MBOXCMD_EXTPTHRU) {
2355
2356                                         memcpy(scp->sense_buffer,
2357                                                 epthru->reqsensearea, 14);
2358
2359                                         scp->result = DRIVER_SENSE << 24 |
2360                                                 DID_OK << 16 |
2361                                                 CHECK_CONDITION << 1;
2362                                 } else {
2363                                         scp->sense_buffer[0] = 0x70;
2364                                         scp->sense_buffer[2] = ABORTED_COMMAND;
2365                                         scp->result = CHECK_CONDITION << 1;
2366                                 }
2367                         }
2368                         break;
2369
2370                 case 0x08:
2371
2372                         scp->result = DID_BUS_BUSY << 16 | status;
2373                         break;
2374
2375                 default:
2376
2377                         /*
2378                          * If TEST_UNIT_READY fails, we know RESERVATION_STATUS
2379                          * failed
2380                          */
2381                         if (scp->cmnd[0] == TEST_UNIT_READY) {
2382                                 scp->result = DID_ERROR << 16 |
2383                                         RESERVATION_CONFLICT << 1;
2384                         }
2385                         else
2386                         /*
2387                          * Error code returned is 1 if Reserve or Release
2388                          * failed or the input parameter is invalid
2389                          */
2390                         if (status == 1 && (scp->cmnd[0] == RESERVE ||
2391                                          scp->cmnd[0] == RELEASE)) {
2392
2393                                 scp->result = DID_ERROR << 16 |
2394                                         RESERVATION_CONFLICT << 1;
2395                         }
2396                         else {
2397                                 scp->result = DID_BAD_TARGET << 16 | status;
2398                         }
2399                 }
2400
2401                 // print a debug message for all failed commands
2402                 if (status) {
2403                         megaraid_mbox_display_scb(adapter, scb);
2404                 }
2405
2406                 // Free our internal resources and call the mid-layer callback
2407                 // routine
2408                 megaraid_mbox_sync_scb(adapter, scb);
2409
2410                 // remove from local clist
2411                 list_del_init(&scb->list);
2412
2413                 // put back in free list
2414                 megaraid_dealloc_scb(adapter, scb);
2415
2416                 // send the scsi packet back to kernel
2417                 scp->scsi_done(scp);
2418         }
2419
2420         return;
2421 }
2422
2423
2424 /**
2425  * megaraid_abort_handler - abort the scsi command
2426  * @scp         : command to be aborted
2427  *
2428  * Abort a previous SCSI request. Only commands on the pending list can be
2429  * aborted. All the commands issued to the F/W must complete.
2430  **/
2431 static int
2432 megaraid_abort_handler(struct scsi_cmnd *scp)
2433 {
2434         adapter_t               *adapter;
2435         mraid_device_t          *raid_dev;
2436         scb_t                   *scb;
2437         scb_t                   *tmp;
2438         int                     found;
2439         unsigned long           flags;
2440         int                     i;
2441
2442
2443         adapter         = SCP2ADAPTER(scp);
2444         raid_dev        = ADAP2RAIDDEV(adapter);
2445
2446         con_log(CL_ANN, (KERN_WARNING
2447                 "megaraid: aborting cmd=%x <c=%d t=%d l=%d>\n",
2448                 scp->cmnd[0], SCP2CHANNEL(scp),
2449                 SCP2TARGET(scp), SCP2LUN(scp)));
2450
2451         // If FW has stopped responding, simply return failure
2452         if (raid_dev->hw_error) {
2453                 con_log(CL_ANN, (KERN_NOTICE
2454                         "megaraid: hw error, not aborting\n"));
2455                 return FAILED;
2456         }
2457
2458         // There might a race here, where the command was completed by the
2459         // firmware and now it is on the completed list. Before we could
2460         // complete the command to the kernel in dpc, the abort came.
2461         // Find out if this is the case to avoid the race.
2462         scb = NULL;
2463         spin_lock_irqsave(COMPLETED_LIST_LOCK(adapter), flags);
2464         list_for_each_entry_safe(scb, tmp, &adapter->completed_list, list) {
2465
2466                 if (scb->scp == scp) {  // Found command
2467
2468                         list_del_init(&scb->list);      // from completed list
2469
2470                         con_log(CL_ANN, (KERN_WARNING
2471                         "megaraid: %d[%d:%d], abort from completed list\n",
2472                                 scb->sno, scb->dev_channel, scb->dev_target));
2473
2474                         scp->result = (DID_ABORT << 16);
2475                         scp->scsi_done(scp);
2476
2477                         megaraid_dealloc_scb(adapter, scb);
2478
2479                         spin_unlock_irqrestore(COMPLETED_LIST_LOCK(adapter),
2480                                 flags);
2481
2482                         return SUCCESS;
2483                 }
2484         }
2485         spin_unlock_irqrestore(COMPLETED_LIST_LOCK(adapter), flags);
2486
2487
2488         // Find out if this command is still on the pending list. If it is and
2489         // was never issued, abort and return success. If the command is owned
2490         // by the firmware, we must wait for it to complete by the FW.
2491         spin_lock_irqsave(PENDING_LIST_LOCK(adapter), flags);
2492         list_for_each_entry_safe(scb, tmp, &adapter->pend_list, list) {
2493
2494                 if (scb->scp == scp) {  // Found command
2495
2496                         list_del_init(&scb->list);      // from pending list
2497
2498                         ASSERT(!(scb->state & SCB_ISSUED));
2499
2500                         con_log(CL_ANN, (KERN_WARNING
2501                                 "megaraid abort: [%d:%d], driver owner\n",
2502                                 scb->dev_channel, scb->dev_target));
2503
2504                         scp->result = (DID_ABORT << 16);
2505                         scp->scsi_done(scp);
2506
2507                         megaraid_dealloc_scb(adapter, scb);
2508
2509                         spin_unlock_irqrestore(PENDING_LIST_LOCK(adapter),
2510                                 flags);
2511
2512                         return SUCCESS;
2513                 }
2514         }
2515         spin_unlock_irqrestore(PENDING_LIST_LOCK(adapter), flags);
2516
2517
2518         // Check do we even own this command, in which case this would be
2519         // owned by the firmware. The only way to locate the FW scb is to
2520         // traverse through the list of all SCB, since driver does not
2521         // maintain these SCBs on any list
2522         found = 0;
2523         spin_lock_irq(&adapter->lock);
2524         for (i = 0; i < MBOX_MAX_SCSI_CMDS; i++) {
2525                 scb = adapter->kscb_list + i;
2526
2527                 if (scb->scp == scp) {
2528
2529                         found = 1;
2530
2531                         if (!(scb->state & SCB_ISSUED)) {
2532                                 con_log(CL_ANN, (KERN_WARNING
2533                                 "megaraid abort: %d[%d:%d], invalid state\n",
2534                                 scb->sno, scb->dev_channel, scb->dev_target));
2535                                 BUG();
2536                         }
2537                         else {
2538                                 con_log(CL_ANN, (KERN_WARNING
2539                                 "megaraid abort: %d[%d:%d], fw owner\n",
2540                                 scb->sno, scb->dev_channel, scb->dev_target));
2541                         }
2542                 }
2543         }
2544         spin_unlock_irq(&adapter->lock);
2545
2546         if (!found) {
2547                 con_log(CL_ANN, (KERN_WARNING "megaraid abort: do now own\n"));
2548
2549                 // FIXME: Should there be a callback for this command?
2550                 return SUCCESS;
2551         }
2552
2553         // We cannot actually abort a command owned by firmware, return
2554         // failure and wait for reset. In host reset handler, we will find out
2555         // if the HBA is still live
2556         return FAILED;
2557 }
2558
2559 /**
2560  * megaraid_reset_handler - device reset handler for mailbox based driver
2561  * @scp         : reference command
2562  *
2563  * Reset handler for the mailbox based controller. First try to find out if
2564  * the FW is still live, in which case the outstanding commands counter mut go
2565  * down to 0. If that happens, also issue the reservation reset command to
2566  * relinquish (possible) reservations on the logical drives connected to this
2567  * host.
2568  **/
2569 static int
2570 megaraid_reset_handler(struct scsi_cmnd *scp)
2571 {
2572         adapter_t       *adapter;
2573         scb_t           *scb;
2574         scb_t           *tmp;
2575         mraid_device_t  *raid_dev;
2576         unsigned long   flags;
2577         uint8_t         raw_mbox[sizeof(mbox_t)];
2578         int             rval;
2579         int             recovery_window;
2580         int             recovering;
2581         int             i;
2582         uioc_t          *kioc;
2583
2584         adapter         = SCP2ADAPTER(scp);
2585         raid_dev        = ADAP2RAIDDEV(adapter);
2586
2587         // return failure if adapter is not responding
2588         if (raid_dev->hw_error) {
2589                 con_log(CL_ANN, (KERN_NOTICE
2590                         "megaraid: hw error, cannot reset\n"));
2591                 return FAILED;
2592         }
2593
2594
2595         // Under exceptional conditions, FW can take up to 3 minutes to
2596         // complete command processing. Wait for additional 2 minutes for the
2597         // pending commands counter to go down to 0. If it doesn't, let the
2598         // controller be marked offline
2599         // Also, reset all the commands currently owned by the driver
2600         spin_lock_irqsave(PENDING_LIST_LOCK(adapter), flags);
2601         list_for_each_entry_safe(scb, tmp, &adapter->pend_list, list) {
2602                 list_del_init(&scb->list);      // from pending list
2603
2604                 if (scb->sno >= MBOX_MAX_SCSI_CMDS) {
2605                         con_log(CL_ANN, (KERN_WARNING
2606                         "megaraid: IOCTL packet with %d[%d:%d] being reset\n",
2607                         scb->sno, scb->dev_channel, scb->dev_target));
2608
2609                         scb->status = -1;
2610
2611                         kioc                    = (uioc_t *)scb->gp;
2612                         kioc->status            = -EFAULT;
2613
2614                         megaraid_mbox_mm_done(adapter, scb);
2615                 } else {
2616                         if (scb->scp == scp) {  // Found command
2617                                 con_log(CL_ANN, (KERN_WARNING
2618                                         "megaraid: %d[%d:%d], reset from pending list\n",
2619                                         scb->sno, scb->dev_channel, scb->dev_target));
2620                         } else {
2621                                 con_log(CL_ANN, (KERN_WARNING
2622                                 "megaraid: IO packet with %d[%d:%d] being reset\n",
2623                                 scb->sno, scb->dev_channel, scb->dev_target));
2624                         }
2625
2626                         scb->scp->result = (DID_RESET << 16);
2627                         scb->scp->scsi_done(scb->scp);
2628
2629                         megaraid_dealloc_scb(adapter, scb);
2630                 }
2631         }
2632         spin_unlock_irqrestore(PENDING_LIST_LOCK(adapter), flags);
2633
2634         if (adapter->outstanding_cmds) {
2635                 con_log(CL_ANN, (KERN_NOTICE
2636                         "megaraid: %d outstanding commands. Max wait %d sec\n",
2637                         adapter->outstanding_cmds,
2638                         (MBOX_RESET_WAIT + MBOX_RESET_EXT_WAIT)));
2639         }
2640
2641         recovery_window = MBOX_RESET_WAIT + MBOX_RESET_EXT_WAIT;
2642
2643         recovering = adapter->outstanding_cmds;
2644
2645         for (i = 0; i < recovery_window; i++) {
2646
2647                 megaraid_ack_sequence(adapter);
2648
2649                 // print a message once every 5 seconds only
2650                 if (!(i % 5)) {
2651                         con_log(CL_ANN, (
2652                         "megaraid mbox: Wait for %d commands to complete:%d\n",
2653                                 adapter->outstanding_cmds,
2654                                 (MBOX_RESET_WAIT + MBOX_RESET_EXT_WAIT) - i));
2655                 }
2656
2657                 // bailout if no recovery happened in reset time
2658                 if (adapter->outstanding_cmds == 0) {
2659                         break;
2660                 }
2661
2662                 msleep(1000);
2663         }
2664
2665         spin_lock(&adapter->lock);
2666
2667         // If still outstanding commands, bail out
2668         if (adapter->outstanding_cmds) {
2669                 con_log(CL_ANN, (KERN_WARNING
2670                         "megaraid mbox: critical hardware error!\n"));
2671
2672                 raid_dev->hw_error = 1;
2673
2674                 rval = FAILED;
2675                 goto out;
2676         }
2677         else {
2678                 con_log(CL_ANN, (KERN_NOTICE
2679                 "megaraid mbox: reset sequence completed successfully\n"));
2680         }
2681
2682
2683         // If the controller supports clustering, reset reservations
2684         if (!adapter->ha) {
2685                 rval = SUCCESS;
2686                 goto out;
2687         }
2688
2689         // clear reservations if any
2690         raw_mbox[0] = CLUSTER_CMD;
2691         raw_mbox[2] = RESET_RESERVATIONS;
2692
2693         rval = SUCCESS;
2694         if (mbox_post_sync_cmd_fast(adapter, raw_mbox) == 0) {
2695                 con_log(CL_ANN,
2696                         (KERN_INFO "megaraid: reservation reset\n"));
2697         }
2698         else {
2699                 rval = FAILED;
2700                 con_log(CL_ANN, (KERN_WARNING
2701                                 "megaraid: reservation reset failed\n"));
2702         }
2703
2704  out:
2705         spin_unlock(&adapter->lock);
2706         return rval;
2707 }
2708
2709 /*
2710  * START: internal commands library
2711  *
2712  * This section of the driver has the common routine used by the driver and
2713  * also has all the FW routines
2714  */
2715
2716 /**
2717  * mbox_post_sync_cmd() - blocking command to the mailbox based controllers
2718  * @adapter     : controller's soft state
2719  * @raw_mbox    : the mailbox
2720  *
2721  * Issue a scb in synchronous and non-interrupt mode for mailbox based
2722  * controllers.
2723  */
2724 static int
2725 mbox_post_sync_cmd(adapter_t *adapter, uint8_t raw_mbox[])
2726 {
2727         mraid_device_t  *raid_dev = ADAP2RAIDDEV(adapter);
2728         mbox64_t        *mbox64;
2729         mbox_t          *mbox;
2730         uint8_t         status;
2731         int             i;
2732
2733
2734         mbox64  = raid_dev->mbox64;
2735         mbox    = raid_dev->mbox;
2736
2737         /*
2738          * Wait until mailbox is free
2739          */
2740         if (megaraid_busywait_mbox(raid_dev) != 0)
2741                 goto blocked_mailbox;
2742
2743         /*
2744          * Copy mailbox data into host structure
2745          */
2746         memcpy((caddr_t)mbox, (caddr_t)raw_mbox, 16);
2747         mbox->cmdid             = 0xFE;
2748         mbox->busy              = 1;
2749         mbox->poll              = 0;
2750         mbox->ack               = 0;
2751         mbox->numstatus         = 0xFF;
2752         mbox->status            = 0xFF;
2753
2754         wmb();
2755         WRINDOOR(raid_dev, raid_dev->mbox_dma | 0x1);
2756
2757         // wait for maximum 1 second for status to post. If the status is not
2758         // available within 1 second, assume FW is initializing and wait
2759         // for an extended amount of time
2760         if (mbox->numstatus == 0xFF) {  // status not yet available
2761                 udelay(25);
2762
2763                 for (i = 0; mbox->numstatus == 0xFF && i < 1000; i++) {
2764                         rmb();
2765                         msleep(1);
2766                 }
2767
2768
2769                 if (i == 1000) {
2770                         con_log(CL_ANN, (KERN_NOTICE
2771                                 "megaraid mailbox: wait for FW to boot      "));
2772
2773                         for (i = 0; (mbox->numstatus == 0xFF) &&
2774                                         (i < MBOX_RESET_WAIT); i++) {
2775                                 rmb();
2776                                 con_log(CL_ANN, ("\b\b\b\b\b[%03d]",
2777                                                         MBOX_RESET_WAIT - i));
2778                                 msleep(1000);
2779                         }
2780
2781                         if (i == MBOX_RESET_WAIT) {
2782
2783                                 con_log(CL_ANN, (
2784                                 "\nmegaraid mailbox: status not available\n"));
2785
2786                                 return -1;
2787                         }
2788                         con_log(CL_ANN, ("\b\b\b\b\b[ok] \n"));
2789                 }
2790         }
2791
2792         // wait for maximum 1 second for poll semaphore
2793         if (mbox->poll != 0x77) {
2794                 udelay(25);
2795
2796                 for (i = 0; (mbox->poll != 0x77) && (i < 1000); i++) {
2797                         rmb();
2798                         msleep(1);
2799                 }
2800
2801                 if (i == 1000) {
2802                         con_log(CL_ANN, (KERN_WARNING
2803                         "megaraid mailbox: could not get poll semaphore\n"));
2804                         return -1;
2805                 }
2806         }
2807
2808         WRINDOOR(raid_dev, raid_dev->mbox_dma | 0x2);
2809         wmb();
2810
2811         // wait for maximum 1 second for acknowledgement
2812         if (RDINDOOR(raid_dev) & 0x2) {
2813                 udelay(25);
2814
2815                 for (i = 0; (RDINDOOR(raid_dev) & 0x2) && (i < 1000); i++) {
2816                         rmb();
2817                         msleep(1);
2818                 }
2819
2820                 if (i == 1000) {
2821                         con_log(CL_ANN, (KERN_WARNING
2822                                 "megaraid mailbox: could not acknowledge\n"));
2823                         return -1;
2824                 }
2825         }
2826         mbox->poll      = 0;
2827         mbox->ack       = 0x77;
2828
2829         status = mbox->status;
2830
2831         // invalidate the completed command id array. After command
2832         // completion, firmware would write the valid id.
2833         mbox->numstatus = 0xFF;
2834         mbox->status    = 0xFF;
2835         for (i = 0; i < MBOX_MAX_FIRMWARE_STATUS; i++) {
2836                 mbox->completed[i] = 0xFF;
2837         }
2838
2839         return status;
2840
2841 blocked_mailbox:
2842
2843         con_log(CL_ANN, (KERN_WARNING "megaraid: blocked mailbox\n") );
2844         return -1;
2845 }
2846
2847
2848 /**
2849  * mbox_post_sync_cmd_fast - blocking command to the mailbox based controllers
2850  * @adapter     : controller's soft state
2851  * @raw_mbox    : the mailbox
2852  *
2853  * Issue a scb in synchronous and non-interrupt mode for mailbox based
2854  * controllers. This is a faster version of the synchronous command and
2855  * therefore can be called in interrupt-context as well.
2856  */
2857 static int
2858 mbox_post_sync_cmd_fast(adapter_t *adapter, uint8_t raw_mbox[])
2859 {
2860         mraid_device_t  *raid_dev = ADAP2RAIDDEV(adapter);
2861         mbox_t          *mbox;
2862         long            i;
2863
2864
2865         mbox    = raid_dev->mbox;
2866
2867         // return immediately if the mailbox is busy
2868         if (mbox->busy) return -1;
2869
2870         // Copy mailbox data into host structure
2871         memcpy((caddr_t)mbox, (caddr_t)raw_mbox, 14);
2872         mbox->cmdid             = 0xFE;
2873         mbox->busy              = 1;
2874         mbox->poll              = 0;
2875         mbox->ack               = 0;
2876         mbox->numstatus         = 0xFF;
2877         mbox->status            = 0xFF;
2878
2879         wmb();
2880         WRINDOOR(raid_dev, raid_dev->mbox_dma | 0x1);
2881
2882         for (i = 0; i < MBOX_SYNC_WAIT_CNT; i++) {
2883                 if (mbox->numstatus != 0xFF) break;
2884                 rmb();
2885                 udelay(MBOX_SYNC_DELAY_200);
2886         }
2887
2888         if (i == MBOX_SYNC_WAIT_CNT) {
2889                 // We may need to re-calibrate the counter
2890                 con_log(CL_ANN, (KERN_CRIT
2891                         "megaraid: fast sync command timed out\n"));
2892         }
2893
2894         WRINDOOR(raid_dev, raid_dev->mbox_dma | 0x2);
2895         wmb();
2896
2897         return mbox->status;
2898 }
2899
2900
2901 /**
2902  * megaraid_busywait_mbox() - Wait until the controller's mailbox is available
2903  * @raid_dev    : RAID device (HBA) soft state
2904  *
2905  * Wait until the controller's mailbox is available to accept more commands.
2906  * Wait for at most 1 second.
2907  */
2908 static int
2909 megaraid_busywait_mbox(mraid_device_t *raid_dev)
2910 {
2911         mbox_t  *mbox = raid_dev->mbox;
2912         int     i = 0;
2913
2914         if (mbox->busy) {
2915                 udelay(25);
2916                 for (i = 0; mbox->busy && i < 1000; i++)
2917                         msleep(1);
2918         }
2919
2920         if (i < 1000) return 0;
2921         else return -1;
2922 }
2923
2924
2925 /**
2926  * megaraid_mbox_product_info - some static information about the controller
2927  * @adapter     : our soft state
2928  *
2929  * Issue commands to the controller to grab some parameters required by our
2930  * caller.
2931  */
2932 static int
2933 megaraid_mbox_product_info(adapter_t *adapter)
2934 {
2935         mraid_device_t          *raid_dev = ADAP2RAIDDEV(adapter);
2936         mbox_t                  *mbox;
2937         uint8_t                 raw_mbox[sizeof(mbox_t)];
2938         mraid_pinfo_t           *pinfo;
2939         dma_addr_t              pinfo_dma_h;
2940         mraid_inquiry3_t        *mraid_inq3;
2941         int                     i;
2942
2943
2944         memset((caddr_t)raw_mbox, 0, sizeof(raw_mbox));
2945         mbox = (mbox_t *)raw_mbox;
2946
2947         /*
2948          * Issue an ENQUIRY3 command to find out certain adapter parameters,
2949          * e.g., max channels, max commands etc.
2950          */
2951         pinfo = pci_zalloc_consistent(adapter->pdev, sizeof(mraid_pinfo_t),
2952                                       &pinfo_dma_h);
2953
2954         if (pinfo == NULL) {
2955                 con_log(CL_ANN, (KERN_WARNING
2956                         "megaraid: out of memory, %s %d\n", __func__,
2957                         __LINE__));
2958
2959                 return -1;
2960         }
2961
2962         mbox->xferaddr = (uint32_t)adapter->ibuf_dma_h;
2963         memset((void *)adapter->ibuf, 0, MBOX_IBUF_SIZE);
2964
2965         raw_mbox[0] = FC_NEW_CONFIG;
2966         raw_mbox[2] = NC_SUBOP_ENQUIRY3;
2967         raw_mbox[3] = ENQ3_GET_SOLICITED_FULL;
2968
2969         // Issue the command
2970         if (mbox_post_sync_cmd(adapter, raw_mbox) != 0) {
2971
2972                 con_log(CL_ANN, (KERN_WARNING "megaraid: Inquiry3 failed\n"));
2973
2974                 pci_free_consistent(adapter->pdev, sizeof(mraid_pinfo_t),
2975                         pinfo, pinfo_dma_h);
2976
2977                 return -1;
2978         }
2979
2980         /*
2981          * Collect information about state of each physical drive
2982          * attached to the controller. We will expose all the disks
2983          * which are not part of RAID
2984          */
2985         mraid_inq3 = (mraid_inquiry3_t *)adapter->ibuf;
2986         for (i = 0; i < MBOX_MAX_PHYSICAL_DRIVES; i++) {
2987                 raid_dev->pdrv_state[i] = mraid_inq3->pdrv_state[i];
2988         }
2989
2990         /*
2991          * Get product info for information like number of channels,
2992          * maximum commands supported.
2993          */
2994         memset((caddr_t)raw_mbox, 0, sizeof(raw_mbox));
2995         mbox->xferaddr = (uint32_t)pinfo_dma_h;
2996
2997         raw_mbox[0] = FC_NEW_CONFIG;
2998         raw_mbox[2] = NC_SUBOP_PRODUCT_INFO;
2999
3000         if (mbox_post_sync_cmd(adapter, raw_mbox) != 0) {
3001
3002                 con_log(CL_ANN, (KERN_WARNING
3003                         "megaraid: product info failed\n"));
3004
3005                 pci_free_consistent(adapter->pdev, sizeof(mraid_pinfo_t),
3006                         pinfo, pinfo_dma_h);
3007
3008                 return -1;
3009         }
3010
3011         /*
3012          * Setup some parameters for host, as required by our caller
3013          */
3014         adapter->max_channel = pinfo->nchannels;
3015
3016         /*
3017          * we will export all the logical drives on a single channel.
3018          * Add 1 since inquires do not come for inititor ID
3019          */
3020         adapter->max_target     = MAX_LOGICAL_DRIVES_40LD + 1;
3021         adapter->max_lun        = 8;    // up to 8 LUNs for non-disk devices
3022
3023         /*
3024          * These are the maximum outstanding commands for the scsi-layer
3025          */
3026         adapter->max_cmds       = MBOX_MAX_SCSI_CMDS;
3027
3028         memset(adapter->fw_version, 0, VERSION_SIZE);
3029         memset(adapter->bios_version, 0, VERSION_SIZE);
3030
3031         memcpy(adapter->fw_version, pinfo->fw_version, 4);
3032         adapter->fw_version[4] = 0;
3033
3034         memcpy(adapter->bios_version, pinfo->bios_version, 4);
3035         adapter->bios_version[4] = 0;
3036
3037         con_log(CL_ANN, (KERN_NOTICE
3038                 "megaraid: fw version:[%s] bios version:[%s]\n",
3039                 adapter->fw_version, adapter->bios_version));
3040
3041         pci_free_consistent(adapter->pdev, sizeof(mraid_pinfo_t), pinfo,
3042                         pinfo_dma_h);
3043
3044         return 0;
3045 }
3046
3047
3048
3049 /**
3050  * megaraid_mbox_extended_cdb - check for support for extended CDBs
3051  * @adapter     : soft state for the controller
3052  *
3053  * This routine check whether the controller in question supports extended
3054  * ( > 10 bytes ) CDBs.
3055  */
3056 static int
3057 megaraid_mbox_extended_cdb(adapter_t *adapter)
3058 {
3059         mbox_t          *mbox;
3060         uint8_t         raw_mbox[sizeof(mbox_t)];
3061         int             rval;
3062
3063         mbox = (mbox_t *)raw_mbox;
3064
3065         memset((caddr_t)raw_mbox, 0, sizeof(raw_mbox));
3066         mbox->xferaddr  = (uint32_t)adapter->ibuf_dma_h;
3067
3068         memset((void *)adapter->ibuf, 0, MBOX_IBUF_SIZE);
3069
3070         raw_mbox[0] = MAIN_MISC_OPCODE;
3071         raw_mbox[2] = SUPPORT_EXT_CDB;
3072
3073         /*
3074          * Issue the command
3075          */
3076         rval = 0;
3077         if (mbox_post_sync_cmd(adapter, raw_mbox) != 0) {
3078                 rval = -1;
3079         }
3080
3081         return rval;
3082 }
3083
3084
3085 /**
3086  * megaraid_mbox_support_ha - Do we support clustering
3087  * @adapter     : soft state for the controller
3088  * @init_id     : ID of the initiator
3089  *
3090  * Determine if the firmware supports clustering and the ID of the initiator.
3091  */
3092 static int
3093 megaraid_mbox_support_ha(adapter_t *adapter, uint16_t *init_id)
3094 {
3095         mbox_t          *mbox;
3096         uint8_t         raw_mbox[sizeof(mbox_t)];
3097         int             rval;
3098
3099
3100         mbox = (mbox_t *)raw_mbox;
3101
3102         memset((caddr_t)raw_mbox, 0, sizeof(raw_mbox));
3103
3104         mbox->xferaddr = (uint32_t)adapter->ibuf_dma_h;
3105
3106         memset((void *)adapter->ibuf, 0, MBOX_IBUF_SIZE);
3107
3108         raw_mbox[0] = GET_TARGET_ID;
3109
3110         // Issue the command
3111         *init_id = 7;
3112         rval =  -1;
3113         if (mbox_post_sync_cmd(adapter, raw_mbox) == 0) {
3114
3115                 *init_id = *(uint8_t *)adapter->ibuf;
3116
3117                 con_log(CL_ANN, (KERN_INFO
3118                         "megaraid: cluster firmware, initiator ID: %d\n",
3119                         *init_id));
3120
3121                 rval =  0;
3122         }
3123
3124         return rval;
3125 }
3126
3127
3128 /**
3129  * megaraid_mbox_support_random_del - Do we support random deletion
3130  * @adapter     : soft state for the controller
3131  *
3132  * Determine if the firmware supports random deletion.
3133  * Return:      1 is operation supported, 0 otherwise
3134  */
3135 static int
3136 megaraid_mbox_support_random_del(adapter_t *adapter)
3137 {
3138         mbox_t          *mbox;
3139         uint8_t         raw_mbox[sizeof(mbox_t)];
3140         int             rval;
3141
3142         /*
3143          * Newer firmware on Dell CERC expect a different
3144          * random deletion handling, so disable it.
3145          */
3146         if (adapter->pdev->vendor == PCI_VENDOR_ID_AMI &&
3147             adapter->pdev->device == PCI_DEVICE_ID_AMI_MEGARAID3 &&
3148             adapter->pdev->subsystem_vendor == PCI_VENDOR_ID_DELL &&
3149             adapter->pdev->subsystem_device == PCI_SUBSYS_ID_CERC_ATA100_4CH &&
3150             (adapter->fw_version[0] > '6' ||
3151              (adapter->fw_version[0] == '6' &&
3152               adapter->fw_version[2] > '6') ||
3153              (adapter->fw_version[0] == '6'
3154               && adapter->fw_version[2] == '6'
3155               && adapter->fw_version[3] > '1'))) {
3156                 con_log(CL_DLEVEL1, ("megaraid: disable random deletion\n"));
3157                 return 0;
3158         }
3159
3160         mbox = (mbox_t *)raw_mbox;
3161
3162         memset((caddr_t)raw_mbox, 0, sizeof(mbox_t));
3163
3164         raw_mbox[0] = FC_DEL_LOGDRV;
3165         raw_mbox[2] = OP_SUP_DEL_LOGDRV;
3166
3167         // Issue the command
3168         rval = 0;
3169         if (mbox_post_sync_cmd(adapter, raw_mbox) == 0) {
3170
3171                 con_log(CL_DLEVEL1, ("megaraid: supports random deletion\n"));
3172
3173                 rval =  1;
3174         }
3175
3176         return rval;
3177 }
3178
3179
3180 /**
3181  * megaraid_mbox_get_max_sg - maximum sg elements supported by the firmware
3182  * @adapter     : soft state for the controller
3183  *
3184  * Find out the maximum number of scatter-gather elements supported by the
3185  * firmware.
3186  */
3187 static int
3188 megaraid_mbox_get_max_sg(adapter_t *adapter)
3189 {
3190         mbox_t          *mbox;
3191         uint8_t         raw_mbox[sizeof(mbox_t)];
3192         int             nsg;
3193
3194
3195         mbox = (mbox_t *)raw_mbox;
3196
3197         memset((caddr_t)raw_mbox, 0, sizeof(mbox_t));
3198
3199         mbox->xferaddr = (uint32_t)adapter->ibuf_dma_h;
3200
3201         memset((void *)adapter->ibuf, 0, MBOX_IBUF_SIZE);
3202
3203         raw_mbox[0] = MAIN_MISC_OPCODE;
3204         raw_mbox[2] = GET_MAX_SG_SUPPORT;
3205
3206         // Issue the command
3207         if (mbox_post_sync_cmd(adapter, raw_mbox) == 0) {
3208                 nsg =  *(uint8_t *)adapter->ibuf;
3209         }
3210         else {
3211                 nsg =  MBOX_DEFAULT_SG_SIZE;
3212         }
3213
3214         if (nsg > MBOX_MAX_SG_SIZE) nsg = MBOX_MAX_SG_SIZE;
3215
3216         return nsg;
3217 }
3218
3219
3220 /**
3221  * megaraid_mbox_enum_raid_scsi - enumerate the RAID and SCSI channels
3222  * @adapter     : soft state for the controller
3223  *
3224  * Enumerate the RAID and SCSI channels for ROMB platforms so that channels
3225  * can be exported as regular SCSI channels.
3226  */
3227 static void
3228 megaraid_mbox_enum_raid_scsi(adapter_t *adapter)
3229 {
3230         mraid_device_t  *raid_dev = ADAP2RAIDDEV(adapter);
3231         mbox_t          *mbox;
3232         uint8_t         raw_mbox[sizeof(mbox_t)];
3233
3234
3235         mbox = (mbox_t *)raw_mbox;
3236
3237         memset((caddr_t)raw_mbox, 0, sizeof(mbox_t));
3238
3239         mbox->xferaddr = (uint32_t)adapter->ibuf_dma_h;
3240
3241         memset((void *)adapter->ibuf, 0, MBOX_IBUF_SIZE);
3242
3243         raw_mbox[0] = CHNL_CLASS;
3244         raw_mbox[2] = GET_CHNL_CLASS;
3245
3246         // Issue the command. If the command fails, all channels are RAID
3247         // channels
3248         raid_dev->channel_class = 0xFF;
3249         if (mbox_post_sync_cmd(adapter, raw_mbox) == 0) {
3250                 raid_dev->channel_class =  *(uint8_t *)adapter->ibuf;
3251         }
3252
3253         return;
3254 }
3255
3256
3257 /**
3258  * megaraid_mbox_flush_cache - flush adapter and disks cache
3259  * @adapter             : soft state for the controller
3260  *
3261  * Flush adapter cache followed by disks cache.
3262  */
3263 static void
3264 megaraid_mbox_flush_cache(adapter_t *adapter)
3265 {
3266         mbox_t  *mbox;
3267         uint8_t raw_mbox[sizeof(mbox_t)];
3268
3269
3270         mbox = (mbox_t *)raw_mbox;
3271
3272         memset((caddr_t)raw_mbox, 0, sizeof(mbox_t));
3273
3274         raw_mbox[0] = FLUSH_ADAPTER;
3275
3276         if (mbox_post_sync_cmd(adapter, raw_mbox) != 0) {
3277                 con_log(CL_ANN, ("megaraid: flush adapter failed\n"));
3278         }
3279
3280         raw_mbox[0] = FLUSH_SYSTEM;
3281
3282         if (mbox_post_sync_cmd(adapter, raw_mbox) != 0) {
3283                 con_log(CL_ANN, ("megaraid: flush disks cache failed\n"));
3284         }
3285
3286         return;
3287 }
3288
3289
3290 /**
3291  * megaraid_mbox_fire_sync_cmd - fire the sync cmd
3292  * @adapter             : soft state for the controller
3293  *
3294  * Clears the pending cmds in FW and reinits its RAID structs.
3295  */
3296 static int
3297 megaraid_mbox_fire_sync_cmd(adapter_t *adapter)
3298 {
3299         mbox_t  *mbox;
3300         uint8_t raw_mbox[sizeof(mbox_t)];
3301         mraid_device_t  *raid_dev = ADAP2RAIDDEV(adapter);
3302         mbox64_t *mbox64;
3303         int     status = 0;
3304         int i;
3305         uint32_t dword;
3306
3307         mbox = (mbox_t *)raw_mbox;
3308
3309         memset((caddr_t)raw_mbox, 0, sizeof(mbox_t));
3310
3311         raw_mbox[0] = 0xFF;
3312
3313         mbox64  = raid_dev->mbox64;
3314         mbox    = raid_dev->mbox;
3315
3316         /* Wait until mailbox is free */
3317         if (megaraid_busywait_mbox(raid_dev) != 0) {
3318                 status = 1;
3319                 goto blocked_mailbox;
3320         }
3321
3322         /* Copy mailbox data into host structure */
3323         memcpy((caddr_t)mbox, (caddr_t)raw_mbox, 16);
3324         mbox->cmdid             = 0xFE;
3325         mbox->busy              = 1;
3326         mbox->poll              = 0;
3327         mbox->ack               = 0;
3328         mbox->numstatus         = 0;
3329         mbox->status            = 0;
3330
3331         wmb();
3332         WRINDOOR(raid_dev, raid_dev->mbox_dma | 0x1);
3333
3334         /* Wait for maximum 1 min for status to post.
3335          * If the Firmware SUPPORTS the ABOVE COMMAND,
3336          * mbox->cmd will be set to 0
3337          * else
3338          * the firmware will reject the command with
3339          * mbox->numstatus set to 1
3340          */
3341
3342         i = 0;
3343         status = 0;
3344         while (!mbox->numstatus && mbox->cmd == 0xFF) {
3345                 rmb();
3346                 msleep(1);
3347                 i++;
3348                 if (i > 1000 * 60) {
3349                         status = 1;
3350                         break;
3351                 }
3352         }
3353         if (mbox->numstatus == 1)
3354                 status = 1; /*cmd not supported*/
3355
3356         /* Check for interrupt line */
3357         dword = RDOUTDOOR(raid_dev);
3358         WROUTDOOR(raid_dev, dword);
3359         WRINDOOR(raid_dev,2);
3360
3361         return status;
3362
3363 blocked_mailbox:
3364         con_log(CL_ANN, (KERN_WARNING "megaraid: blocked mailbox\n"));
3365         return status;
3366 }
3367
3368 /**
3369  * megaraid_mbox_display_scb - display SCB information, mostly debug purposes
3370  * @adapter             : controller's soft state
3371  * @scb                 : SCB to be displayed
3372  * @level               : debug level for console print
3373  *
3374  * Diplay information about the given SCB iff the current debug level is
3375  * verbose.
3376  */
3377 static void
3378 megaraid_mbox_display_scb(adapter_t *adapter, scb_t *scb)
3379 {
3380         mbox_ccb_t              *ccb;
3381         struct scsi_cmnd        *scp;
3382         mbox_t                  *mbox;
3383         int                     level;
3384         int                     i;
3385
3386
3387         ccb     = (mbox_ccb_t *)scb->ccb;
3388         scp     = scb->scp;
3389         mbox    = ccb->mbox;
3390
3391         level = CL_DLEVEL3;
3392
3393         con_log(level, (KERN_NOTICE
3394                 "megaraid mailbox: status:%#x cmd:%#x id:%#x ", scb->status,
3395                 mbox->cmd, scb->sno));
3396
3397         con_log(level, ("sec:%#x lba:%#x addr:%#x ld:%d sg:%d\n",
3398                 mbox->numsectors, mbox->lba, mbox->xferaddr, mbox->logdrv,
3399                 mbox->numsge));
3400
3401         if (!scp) return;
3402
3403         con_log(level, (KERN_NOTICE "scsi cmnd: "));
3404
3405         for (i = 0; i < scp->cmd_len; i++) {
3406                 con_log(level, ("%#2.02x ", scp->cmnd[i]));
3407         }
3408
3409         con_log(level, ("\n"));
3410
3411         return;
3412 }
3413
3414
3415 /**
3416  * megaraid_mbox_setup_device_map - manage device ids
3417  * @adapter     : Driver's soft state
3418  *
3419  * Manage the device ids to have an appropriate mapping between the kernel
3420  * scsi addresses and megaraid scsi and logical drive addresses. We export
3421  * scsi devices on their actual addresses, whereas the logical drives are
3422  * exported on a virtual scsi channel.
3423  */
3424 static void
3425 megaraid_mbox_setup_device_map(adapter_t *adapter)
3426 {
3427         uint8_t         c;
3428         uint8_t         t;
3429
3430         /*
3431          * First fill the values on the logical drive channel
3432          */
3433         for (t = 0; t < LSI_MAX_LOGICAL_DRIVES_64LD; t++)
3434                 adapter->device_ids[adapter->max_channel][t] =
3435                         (t < adapter->init_id) ?  t : t - 1;
3436
3437         adapter->device_ids[adapter->max_channel][adapter->init_id] = 0xFF;
3438
3439         /*
3440          * Fill the values on the physical devices channels
3441          */
3442         for (c = 0; c < adapter->max_channel; c++)
3443                 for (t = 0; t < LSI_MAX_LOGICAL_DRIVES_64LD; t++)
3444                         adapter->device_ids[c][t] = (c << 8) | t;
3445 }
3446
3447
3448 /*
3449  * END: internal commands library
3450  */
3451
3452 /*
3453  * START: Interface for the common management module
3454  *
3455  * This is the module, which interfaces with the common management module to
3456  * provide support for ioctl and sysfs
3457  */
3458
3459 /**
3460  * megaraid_cmm_register - register with the management module
3461  * @adapter             : HBA soft state
3462  *
3463  * Register with the management module, which allows applications to issue
3464  * ioctl calls to the drivers. This interface is used by the management module
3465  * to setup sysfs support as well.
3466  */
3467 static int
3468 megaraid_cmm_register(adapter_t *adapter)
3469 {
3470         mraid_device_t  *raid_dev = ADAP2RAIDDEV(adapter);
3471         mraid_mmadp_t   adp;
3472         scb_t           *scb;
3473         mbox_ccb_t      *ccb;
3474         int             rval;
3475         int             i;
3476
3477         // Allocate memory for the base list of scb for management module.
3478         adapter->uscb_list = kcalloc(MBOX_MAX_USER_CMDS, sizeof(scb_t), GFP_KERNEL);
3479
3480         if (adapter->uscb_list == NULL) {
3481                 con_log(CL_ANN, (KERN_WARNING
3482                         "megaraid: out of memory, %s %d\n", __func__,
3483                         __LINE__));
3484                 return -1;
3485         }
3486
3487
3488         // Initialize the synchronization parameters for resources for
3489         // commands for management module
3490         INIT_LIST_HEAD(&adapter->uscb_pool);
3491
3492         spin_lock_init(USER_FREE_LIST_LOCK(adapter));
3493
3494
3495
3496         // link all the packets. Note, CCB for commands, coming from the
3497         // commom management module, mailbox physical address are already
3498         // setup by it. We just need placeholder for that in our local command
3499         // control blocks
3500         for (i = 0; i < MBOX_MAX_USER_CMDS; i++) {
3501
3502                 scb                     = adapter->uscb_list + i;
3503                 ccb                     = raid_dev->uccb_list + i;
3504
3505                 scb->ccb                = (caddr_t)ccb;
3506                 ccb->mbox64             = raid_dev->umbox64 + i;
3507                 ccb->mbox               = &ccb->mbox64->mbox32;
3508                 ccb->raw_mbox           = (uint8_t *)ccb->mbox;
3509
3510                 scb->gp                 = 0;
3511
3512                 // COMMAND ID 0 - (MBOX_MAX_SCSI_CMDS-1) ARE RESERVED FOR
3513                 // COMMANDS COMING FROM IO SUBSYSTEM (MID-LAYER)
3514                 scb->sno                = i + MBOX_MAX_SCSI_CMDS;
3515
3516                 scb->scp                = NULL;
3517                 scb->state              = SCB_FREE;
3518                 scb->dma_direction      = PCI_DMA_NONE;
3519                 scb->dma_type           = MRAID_DMA_NONE;
3520                 scb->dev_channel        = -1;
3521                 scb->dev_target         = -1;
3522
3523                 // put scb in the free pool
3524                 list_add_tail(&scb->list, &adapter->uscb_pool);
3525         }
3526
3527         adp.unique_id           = adapter->unique_id;
3528         adp.drvr_type           = DRVRTYPE_MBOX;
3529         adp.drvr_data           = (unsigned long)adapter;
3530         adp.pdev                = adapter->pdev;
3531         adp.issue_uioc          = megaraid_mbox_mm_handler;
3532         adp.timeout             = MBOX_RESET_WAIT + MBOX_RESET_EXT_WAIT;
3533         adp.max_kioc            = MBOX_MAX_USER_CMDS;
3534
3535         if ((rval = mraid_mm_register_adp(&adp)) != 0) {
3536
3537                 con_log(CL_ANN, (KERN_WARNING
3538                         "megaraid mbox: did not register with CMM\n"));
3539
3540                 kfree(adapter->uscb_list);
3541         }
3542
3543         return rval;
3544 }
3545
3546
3547 /**
3548  * megaraid_cmm_unregister - un-register with the management module
3549  * @adapter             : HBA soft state
3550  *
3551  * Un-register with the management module.
3552  * FIXME: mgmt module must return failure for unregister if it has pending
3553  * commands in LLD.
3554  */
3555 static int
3556 megaraid_cmm_unregister(adapter_t *adapter)
3557 {
3558         kfree(adapter->uscb_list);
3559         mraid_mm_unregister_adp(adapter->unique_id);
3560         return 0;
3561 }
3562
3563
3564 /**
3565  * megaraid_mbox_mm_handler - interface for CMM to issue commands to LLD
3566  * @drvr_data           : LLD specific data
3567  * @kioc                : CMM interface packet
3568  * @action              : command action
3569  *
3570  * This routine is invoked whenever the Common Management Module (CMM) has a
3571  * command for us. The 'action' parameter specifies if this is a new command
3572  * or otherwise.
3573  */
3574 static int
3575 megaraid_mbox_mm_handler(unsigned long drvr_data, uioc_t *kioc, uint32_t action)
3576 {
3577         adapter_t *adapter;
3578
3579         if (action != IOCTL_ISSUE) {
3580                 con_log(CL_ANN, (KERN_WARNING
3581                         "megaraid: unsupported management action:%#2x\n",
3582                         action));
3583                 return (-ENOTSUPP);
3584         }
3585
3586         adapter = (adapter_t *)drvr_data;
3587
3588         // make sure this adapter is not being detached right now.
3589         if (atomic_read(&adapter->being_detached)) {
3590                 con_log(CL_ANN, (KERN_WARNING
3591                         "megaraid: reject management request, detaching\n"));
3592                 return (-ENODEV);
3593         }
3594
3595         switch (kioc->opcode) {
3596
3597         case GET_ADAP_INFO:
3598
3599                 kioc->status =  gather_hbainfo(adapter, (mraid_hba_info_t *)
3600                                         (unsigned long)kioc->buf_vaddr);
3601
3602                 kioc->done(kioc);
3603
3604                 return kioc->status;
3605
3606         case MBOX_CMD:
3607
3608                 return megaraid_mbox_mm_command(adapter, kioc);
3609
3610         default:
3611                 kioc->status = (-EINVAL);
3612                 kioc->done(kioc);
3613                 return (-EINVAL);
3614         }
3615
3616         return 0;       // not reached
3617 }
3618
3619 /**
3620  * megaraid_mbox_mm_command - issues commands routed through CMM
3621  * @adapter             : HBA soft state
3622  * @kioc                : management command packet
3623  *
3624  * Issues commands, which are routed through the management module.
3625  */
3626 static int
3627 megaraid_mbox_mm_command(adapter_t *adapter, uioc_t *kioc)
3628 {
3629         struct list_head        *head = &adapter->uscb_pool;
3630         mbox64_t                *mbox64;
3631         uint8_t                 *raw_mbox;
3632         scb_t                   *scb;
3633         mbox_ccb_t              *ccb;
3634         unsigned long           flags;
3635
3636         // detach one scb from free pool
3637         spin_lock_irqsave(USER_FREE_LIST_LOCK(adapter), flags);
3638
3639         if (list_empty(head)) { // should never happen because of CMM
3640
3641                 con_log(CL_ANN, (KERN_WARNING
3642                         "megaraid mbox: bug in cmm handler, lost resources\n"));
3643
3644                 spin_unlock_irqrestore(USER_FREE_LIST_LOCK(adapter), flags);
3645
3646                 return (-EINVAL);
3647         }
3648
3649         scb = list_entry(head->next, scb_t, list);
3650         list_del_init(&scb->list);
3651
3652         spin_unlock_irqrestore(USER_FREE_LIST_LOCK(adapter), flags);
3653
3654         scb->state              = SCB_ACTIVE;
3655         scb->dma_type           = MRAID_DMA_NONE;
3656         scb->dma_direction      = PCI_DMA_NONE;
3657
3658         ccb             = (mbox_ccb_t *)scb->ccb;
3659         mbox64          = (mbox64_t *)(unsigned long)kioc->cmdbuf;
3660         raw_mbox        = (uint8_t *)&mbox64->mbox32;
3661
3662         memcpy(ccb->mbox64, mbox64, sizeof(mbox64_t));
3663
3664         scb->gp         = (unsigned long)kioc;
3665
3666         /*
3667          * If it is a logdrv random delete operation, we have to wait till
3668          * there are no outstanding cmds at the fw and then issue it directly
3669          */
3670         if (raw_mbox[0] == FC_DEL_LOGDRV && raw_mbox[2] == OP_DEL_LOGDRV) {
3671
3672                 if (wait_till_fw_empty(adapter)) {
3673                         con_log(CL_ANN, (KERN_NOTICE
3674                                 "megaraid mbox: LD delete, timed out\n"));
3675
3676                         kioc->status = -ETIME;
3677
3678                         scb->status = -1;
3679
3680                         megaraid_mbox_mm_done(adapter, scb);
3681
3682                         return (-ETIME);
3683                 }
3684
3685                 INIT_LIST_HEAD(&scb->list);
3686
3687                 scb->state = SCB_ISSUED;
3688                 if (mbox_post_cmd(adapter, scb) != 0) {
3689
3690                         con_log(CL_ANN, (KERN_NOTICE
3691                                 "megaraid mbox: LD delete, mailbox busy\n"));
3692
3693                         kioc->status = -EBUSY;
3694
3695                         scb->status = -1;
3696
3697                         megaraid_mbox_mm_done(adapter, scb);
3698
3699                         return (-EBUSY);
3700                 }
3701
3702                 return 0;
3703         }
3704
3705         // put the command on the pending list and execute
3706         megaraid_mbox_runpendq(adapter, scb);
3707
3708         return 0;
3709 }
3710
3711
3712 static int
3713 wait_till_fw_empty(adapter_t *adapter)
3714 {
3715         unsigned long   flags = 0;
3716         int             i;
3717
3718
3719         /*
3720          * Set the quiescent flag to stop issuing cmds to FW.
3721          */
3722         spin_lock_irqsave(&adapter->lock, flags);
3723         adapter->quiescent++;
3724         spin_unlock_irqrestore(&adapter->lock, flags);
3725
3726         /*
3727          * Wait till there are no more cmds outstanding at FW. Try for at most
3728          * 60 seconds
3729          */
3730         for (i = 0; i < 60 && adapter->outstanding_cmds; i++) {
3731                 con_log(CL_DLEVEL1, (KERN_INFO
3732                         "megaraid: FW has %d pending commands\n",
3733                         adapter->outstanding_cmds));
3734
3735                 msleep(1000);
3736         }
3737
3738         return adapter->outstanding_cmds;
3739 }
3740
3741
3742 /**
3743  * megaraid_mbox_mm_done - callback for CMM commands
3744  * @adapter     : HBA soft state
3745  * @scb         : completed command
3746  *
3747  * Callback routine for internal commands originated from the management
3748  * module.
3749  */
3750 static void
3751 megaraid_mbox_mm_done(adapter_t *adapter, scb_t *scb)
3752 {
3753         uioc_t                  *kioc;
3754         mbox64_t                *mbox64;
3755         uint8_t                 *raw_mbox;
3756         unsigned long           flags;
3757
3758         kioc                    = (uioc_t *)scb->gp;
3759         mbox64                  = (mbox64_t *)(unsigned long)kioc->cmdbuf;
3760         mbox64->mbox32.status   = scb->status;
3761         raw_mbox                = (uint8_t *)&mbox64->mbox32;
3762
3763
3764         // put scb in the free pool
3765         scb->state      = SCB_FREE;
3766         scb->scp        = NULL;
3767
3768         spin_lock_irqsave(USER_FREE_LIST_LOCK(adapter), flags);
3769
3770         list_add(&scb->list, &adapter->uscb_pool);
3771
3772         spin_unlock_irqrestore(USER_FREE_LIST_LOCK(adapter), flags);
3773
3774         // if a delete logical drive operation succeeded, restart the
3775         // controller
3776         if (raw_mbox[0] == FC_DEL_LOGDRV && raw_mbox[2] == OP_DEL_LOGDRV) {
3777
3778                 adapter->quiescent--;
3779
3780                 megaraid_mbox_runpendq(adapter, NULL);
3781         }
3782
3783         kioc->done(kioc);
3784
3785         return;
3786 }
3787
3788
3789 /**
3790  * gather_hbainfo - HBA characteristics for the applications
3791  * @adapter             : HBA soft state
3792  * @hinfo               : pointer to the caller's host info strucuture
3793  */
3794 static int
3795 gather_hbainfo(adapter_t *adapter, mraid_hba_info_t *hinfo)
3796 {
3797         uint8_t dmajor;
3798
3799         dmajor                  = megaraid_mbox_version[0];
3800
3801         hinfo->pci_vendor_id    = adapter->pdev->vendor;
3802         hinfo->pci_device_id    = adapter->pdev->device;
3803         hinfo->subsys_vendor_id = adapter->pdev->subsystem_vendor;
3804         hinfo->subsys_device_id = adapter->pdev->subsystem_device;
3805
3806         hinfo->pci_bus          = adapter->pdev->bus->number;
3807         hinfo->pci_dev_fn       = adapter->pdev->devfn;
3808         hinfo->pci_slot         = PCI_SLOT(adapter->pdev->devfn);
3809         hinfo->irq              = adapter->host->irq;
3810         hinfo->baseport         = ADAP2RAIDDEV(adapter)->baseport;
3811
3812         hinfo->unique_id        = (hinfo->pci_bus << 8) | adapter->pdev->devfn;
3813         hinfo->host_no          = adapter->host->host_no;
3814
3815         return 0;
3816 }
3817
3818 /*
3819  * END: Interface for the common management module
3820  */
3821
3822
3823
3824 /**
3825  * megaraid_sysfs_alloc_resources - allocate sysfs related resources
3826  * @adapter     : controller's soft state
3827  *
3828  * Allocate packets required to issue FW calls whenever the sysfs attributes
3829  * are read. These attributes would require up-to-date information from the
3830  * FW. Also set up resources for mutual exclusion to share these resources and
3831  * the wait queue.
3832  *
3833  * Return 0 on success.
3834  * Return -ERROR_CODE on failure.
3835  */
3836 static int
3837 megaraid_sysfs_alloc_resources(adapter_t *adapter)
3838 {
3839         mraid_device_t  *raid_dev = ADAP2RAIDDEV(adapter);
3840         int             rval = 0;
3841
3842         raid_dev->sysfs_uioc = kmalloc(sizeof(uioc_t), GFP_KERNEL);
3843
3844         raid_dev->sysfs_mbox64 = kmalloc(sizeof(mbox64_t), GFP_KERNEL);
3845
3846         raid_dev->sysfs_buffer = pci_alloc_consistent(adapter->pdev,
3847                         PAGE_SIZE, &raid_dev->sysfs_buffer_dma);
3848
3849         if (!raid_dev->sysfs_uioc || !raid_dev->sysfs_mbox64 ||
3850                 !raid_dev->sysfs_buffer) {
3851
3852                 con_log(CL_ANN, (KERN_WARNING
3853                         "megaraid: out of memory, %s %d\n", __func__,
3854                         __LINE__));
3855
3856                 rval = -ENOMEM;
3857
3858                 megaraid_sysfs_free_resources(adapter);
3859         }
3860
3861         mutex_init(&raid_dev->sysfs_mtx);
3862
3863         init_waitqueue_head(&raid_dev->sysfs_wait_q);
3864
3865         return rval;
3866 }
3867
3868
3869 /**
3870  * megaraid_sysfs_free_resources - free sysfs related resources
3871  * @adapter     : controller's soft state
3872  *
3873  * Free packets allocated for sysfs FW commands
3874  */
3875 static void
3876 megaraid_sysfs_free_resources(adapter_t *adapter)
3877 {
3878         mraid_device_t  *raid_dev = ADAP2RAIDDEV(adapter);
3879
3880         kfree(raid_dev->sysfs_uioc);
3881         kfree(raid_dev->sysfs_mbox64);
3882
3883         if (raid_dev->sysfs_buffer) {
3884                 pci_free_consistent(adapter->pdev, PAGE_SIZE,
3885                         raid_dev->sysfs_buffer, raid_dev->sysfs_buffer_dma);
3886         }
3887 }
3888
3889
3890 /**
3891  * megaraid_sysfs_get_ldmap_done - callback for get ldmap
3892  * @uioc        : completed packet
3893  *
3894  * Callback routine called in the ISR/tasklet context for get ldmap call
3895  */
3896 static void
3897 megaraid_sysfs_get_ldmap_done(uioc_t *uioc)
3898 {
3899         adapter_t       *adapter = (adapter_t *)uioc->buf_vaddr;
3900         mraid_device_t  *raid_dev = ADAP2RAIDDEV(adapter);
3901
3902         uioc->status = 0;
3903
3904         wake_up(&raid_dev->sysfs_wait_q);
3905 }
3906
3907
3908 /**
3909  * megaraid_sysfs_get_ldmap_timeout - timeout handling for get ldmap
3910  * @data        : timed out packet
3911  *
3912  * Timeout routine to recover and return to application, in case the adapter
3913  * has stopped responding. A timeout of 60 seconds for this command seems like
3914  * a good value.
3915  */
3916 static void
3917 megaraid_sysfs_get_ldmap_timeout(unsigned long data)
3918 {
3919         uioc_t          *uioc = (uioc_t *)data;
3920         adapter_t       *adapter = (adapter_t *)uioc->buf_vaddr;
3921         mraid_device_t  *raid_dev = ADAP2RAIDDEV(adapter);
3922
3923         uioc->status = -ETIME;
3924
3925         wake_up(&raid_dev->sysfs_wait_q);
3926 }
3927
3928
3929 /**
3930  * megaraid_sysfs_get_ldmap - get update logical drive map
3931  * @adapter     : controller's soft state
3932  *
3933  * This routine will be called whenever user reads the logical drive
3934  * attributes, go get the current logical drive mapping table from the
3935  * firmware. We use the management API's to issue commands to the controller.
3936  *
3937  * NOTE: The commands issuance functionality is not generalized and
3938  * implemented in context of "get ld map" command only. If required, the
3939  * command issuance logical can be trivially pulled out and implemented as a
3940  * standalone library. For now, this should suffice since there is no other
3941  * user of this interface.
3942  *
3943  * Return 0 on success.
3944  * Return -1 on failure.
3945  */
3946 static int
3947 megaraid_sysfs_get_ldmap(adapter_t *adapter)
3948 {
3949         mraid_device_t          *raid_dev = ADAP2RAIDDEV(adapter);
3950         uioc_t                  *uioc;
3951         mbox64_t                *mbox64;
3952         mbox_t                  *mbox;
3953         char                    *raw_mbox;
3954         struct timer_list       sysfs_timer;
3955         struct timer_list       *timerp;
3956         caddr_t                 ldmap;
3957         int                     rval = 0;
3958
3959         /*
3960          * Allow only one read at a time to go through the sysfs attributes
3961          */
3962         mutex_lock(&raid_dev->sysfs_mtx);
3963
3964         uioc    = raid_dev->sysfs_uioc;
3965         mbox64  = raid_dev->sysfs_mbox64;
3966         ldmap   = raid_dev->sysfs_buffer;
3967
3968         memset(uioc, 0, sizeof(uioc_t));
3969         memset(mbox64, 0, sizeof(mbox64_t));
3970         memset(ldmap, 0, sizeof(raid_dev->curr_ldmap));
3971
3972         mbox            = &mbox64->mbox32;
3973         raw_mbox        = (char *)mbox;
3974         uioc->cmdbuf    = (uint64_t)(unsigned long)mbox64;
3975         uioc->buf_vaddr = (caddr_t)adapter;
3976         uioc->status    = -ENODATA;
3977         uioc->done      = megaraid_sysfs_get_ldmap_done;
3978
3979         /*
3980          * Prepare the mailbox packet to get the current logical drive mapping
3981          * table
3982          */
3983         mbox->xferaddr = (uint32_t)raid_dev->sysfs_buffer_dma;
3984
3985         raw_mbox[0] = FC_DEL_LOGDRV;
3986         raw_mbox[2] = OP_GET_LDID_MAP;
3987
3988         /*
3989          * Setup a timer to recover from a non-responding controller
3990          */
3991         timerp  = &sysfs_timer;
3992         init_timer(timerp);
3993
3994         timerp->function        = megaraid_sysfs_get_ldmap_timeout;
3995         timerp->data            = (unsigned long)uioc;
3996         timerp->expires         = jiffies + 60 * HZ;
3997
3998         add_timer(timerp);
3999
4000         /*
4001          * Send the command to the firmware
4002          */
4003         rval = megaraid_mbox_mm_command(adapter, uioc);
4004
4005         if (rval == 0) {        // command successfully issued
4006                 wait_event(raid_dev->sysfs_wait_q, (uioc->status != -ENODATA));
4007
4008                 /*
4009                  * Check if the command timed out
4010                  */
4011                 if (uioc->status == -ETIME) {
4012                         con_log(CL_ANN, (KERN_NOTICE
4013                                 "megaraid: sysfs get ld map timed out\n"));
4014
4015                         rval = -ETIME;
4016                 }
4017                 else {
4018                         rval = mbox->status;
4019                 }
4020
4021                 if (rval == 0) {
4022                         memcpy(raid_dev->curr_ldmap, ldmap,
4023                                 sizeof(raid_dev->curr_ldmap));
4024                 }
4025                 else {
4026                         con_log(CL_ANN, (KERN_NOTICE
4027                                 "megaraid: get ld map failed with %x\n", rval));
4028                 }
4029         }
4030         else {
4031                 con_log(CL_ANN, (KERN_NOTICE
4032                         "megaraid: could not issue ldmap command:%x\n", rval));
4033         }
4034
4035
4036         del_timer_sync(timerp);
4037
4038         mutex_unlock(&raid_dev->sysfs_mtx);
4039
4040         return rval;
4041 }
4042
4043
4044 /**
4045  * megaraid_sysfs_show_app_hndl - display application handle for this adapter
4046  * @cdev        : class device object representation for the host
4047  * @buf         : buffer to send data to
4048  *
4049  * Display the handle used by the applications while executing management
4050  * tasks on the adapter. We invoke a management module API to get the adapter
4051  * handle, since we do not interface with applications directly.
4052  */
4053 static ssize_t
4054 megaraid_sysfs_show_app_hndl(struct device *dev, struct device_attribute *attr,
4055                              char *buf)
4056 {
4057         struct Scsi_Host *shost = class_to_shost(dev);
4058         adapter_t       *adapter = (adapter_t *)SCSIHOST2ADAP(shost);
4059         uint32_t        app_hndl;
4060
4061         app_hndl = mraid_mm_adapter_app_handle(adapter->unique_id);
4062
4063         return snprintf(buf, 8, "%u\n", app_hndl);
4064 }
4065
4066
4067 /**
4068  * megaraid_sysfs_show_ldnum - display the logical drive number for this device
4069  * @dev         : device object representation for the scsi device
4070  * @attr        : device attribute to show
4071  * @buf         : buffer to send data to
4072  *
4073  * Display the logical drive number for the device in question, if it a valid
4074  * logical drive. For physical devices, "-1" is returned.
4075  *
4076  * The logical drive number is displayed in following format:
4077  *
4078  * <SCSI ID> <LD NUM> <LD STICKY ID> <APP ADAPTER HANDLE>
4079  *
4080  *   <int>     <int>       <int>            <int>
4081  */
4082 static ssize_t
4083 megaraid_sysfs_show_ldnum(struct device *dev, struct device_attribute *attr, char *buf)
4084 {
4085         struct scsi_device *sdev = to_scsi_device(dev);
4086         adapter_t       *adapter = (adapter_t *)SCSIHOST2ADAP(sdev->host);
4087         mraid_device_t  *raid_dev = ADAP2RAIDDEV(adapter);
4088         int             scsi_id = -1;
4089         int             logical_drv = -1;
4090         int             ldid_map = -1;
4091         uint32_t        app_hndl = 0;
4092         int             mapped_sdev_id;
4093         int             rval;
4094         int             i;
4095
4096         if (raid_dev->random_del_supported &&
4097                         MRAID_IS_LOGICAL_SDEV(adapter, sdev)) {
4098
4099                 rval = megaraid_sysfs_get_ldmap(adapter);
4100                 if (rval == 0) {
4101
4102                         for (i = 0; i < MAX_LOGICAL_DRIVES_40LD; i++) {
4103
4104                                 mapped_sdev_id = sdev->id;
4105
4106                                 if (sdev->id > adapter->init_id) {
4107                                         mapped_sdev_id -= 1;
4108                                 }
4109
4110                                 if (raid_dev->curr_ldmap[i] == mapped_sdev_id) {
4111
4112                                         scsi_id = sdev->id;
4113
4114                                         logical_drv = i;
4115
4116                                         ldid_map = raid_dev->curr_ldmap[i];
4117
4118                                         app_hndl = mraid_mm_adapter_app_handle(
4119                                                         adapter->unique_id);
4120
4121                                         break;
4122                                 }
4123                         }
4124                 }
4125                 else {
4126                         con_log(CL_ANN, (KERN_NOTICE
4127                                 "megaraid: sysfs get ld map failed: %x\n",
4128                                 rval));
4129                 }
4130         }
4131
4132         return snprintf(buf, 36, "%d %d %d %d\n", scsi_id, logical_drv,
4133                         ldid_map, app_hndl);
4134 }
4135
4136
4137 /*
4138  * END: Mailbox Low Level Driver
4139  */
4140 module_init(megaraid_init);
4141 module_exit(megaraid_exit);
4142
4143 /* vim: set ts=8 sw=8 tw=78 ai si: */