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      : v2.20.4 (September 27 2004)
  14  *
  15  * Authors:
  16  *      Atul Mukker             <Atul.Mukker@lsil.com>
  17  *      Sreenivas Bagalkote     <Sreenivas.Bagalkote@lsil.com>
  18  *      Manoj Jose              <Manoj.Jose@lsil.com>
  19  *
  20  * List of supported controllers
  21  *
  22  * OEM  Product Name                    VID     DID     SSVID   SSID
  23  * ---  ------------                    ---     ---     ----    ----
  24  * Dell PERC3/QC                        101E    1960    1028    0471
  25  * Dell PERC3/DC                        101E    1960    1028    0493
  26  * Dell PERC3/SC                        101E    1960    1028    0475
  27  * Dell PERC3/Di                        1028    1960    1028    0123
  28  * Dell PERC4/SC                        1000    1960    1028    0520
  29  * Dell PERC4/DC                        1000    1960    1028    0518
  30  * Dell PERC4/QC                        1000    0407    1028    0531
  31  * Dell PERC4/Di                        1028    000F    1028    014A
  32  * Dell PERC 4e/Si                      1028    0013    1028    016c
  33  * Dell PERC 4e/Di                      1028    0013    1028    016d
  34  * Dell PERC 4e/Di                      1028    0013    1028    016e
  35  * Dell PERC 4e/Di                      1028    0013    1028    016f
  36  * Dell PERC 4e/Di                      1028    0013    1028    0170
  37  * Dell PERC 4e/DC                      1000    0408    1028    0002
  38  * Dell PERC 4e/SC                      1000    0408    1028    0001
  39  *
  40  *
  41  * LSI MegaRAID SCSI 320-0              1000    1960    1000    A520
  42  * LSI MegaRAID SCSI 320-1              1000    1960    1000    0520
  43  * LSI MegaRAID SCSI 320-2              1000    1960    1000    0518
  44  * LSI MegaRAID SCSI 320-0X             1000    0407    1000    0530
  45  * LSI MegaRAID SCSI 320-2X             1000    0407    1000    0532
  46  * LSI MegaRAID SCSI 320-4X             1000    0407    1000    0531
  47  * LSI MegaRAID SCSI 320-1E             1000    0408    1000    0001
  48  * LSI MegaRAID SCSI 320-2E             1000    0408    1000    0002
  49  * LSI MegaRAID SATA 150-4              1000    1960    1000    4523
  50  * LSI MegaRAID SATA 150-6              1000    1960    1000    0523
  51  * LSI MegaRAID SATA 300-4X             1000    0409    1000    3004
  52  * LSI MegaRAID SATA 300-8X             1000    0409    1000    3008
  53  *
  54  * INTEL RAID Controller SRCU42X        1000    0407    8086    0532
  55  * INTEL RAID Controller SRCS16         1000    1960    8086    0523
  56  * INTEL RAID Controller SRCU42E        1000    0408    8086    0002
  57  * INTEL RAID Controller SRCZCRX        1000    0407    8086    0530
  58  * INTEL RAID Controller SRCS28X        1000    0409    8086    3008
  59  * INTEL RAID Controller SROMBU42E      1000    0408    8086    3431
  60  * INTEL RAID Controller SROMBU42E      1000    0408    8086    3499
  61  * INTEL RAID Controller SRCU51L        1000    1960    8086    0520
  62  *
  63  *
  64  * FSC  MegaRAID PCI Express ROMB       1000    0408    1734    1065
  65  *
  66  *
  67  * ACER MegaRAID ROMB-2E                1000    0408    1025    004D
  68  *
  69  *
  70  * For history of changes, see Documentation/ChangeLog.megaraid
  71  */
  72
  73 #include "megaraid_mbox.h"
  74
  75 static int megaraid_init(void);
  76 static void megaraid_exit(void);
  77
  78 static int megaraid_probe_one(struct pci_dev*, const struct pci_device_id *);
  79 static void megaraid_detach_one(struct pci_dev *);
  80 static void megaraid_mbox_shutdown(struct device *);
  81
  82 static int megaraid_io_attach(adapter_t *);
  83 static void megaraid_io_detach(adapter_t *);
  84
  85 static int megaraid_init_mbox(adapter_t *);
  86 static void megaraid_fini_mbox(adapter_t *);
  87
  88 static int megaraid_alloc_cmd_packets(adapter_t *);
  89 static void megaraid_free_cmd_packets(adapter_t *);
  90
  91 static int megaraid_mbox_setup_dma_pools(adapter_t *);
  92 static void megaraid_mbox_teardown_dma_pools(adapter_t *);
  93
  94 static int megaraid_abort_handler(struct scsi_cmnd *);
  95 static int megaraid_reset_handler(struct scsi_cmnd *);
  96
  97 static int mbox_post_sync_cmd(adapter_t *, uint8_t []);
  98 static int mbox_post_sync_cmd_fast(adapter_t *, uint8_t []);
  99 static int megaraid_busywait_mbox(mraid_device_t *);
 100 static int megaraid_mbox_product_info(adapter_t *);
 101 static int megaraid_mbox_extended_cdb(adapter_t *);
 102 static int megaraid_mbox_support_ha(adapter_t *, uint16_t *);
 103 static int megaraid_mbox_support_random_del(adapter_t *);
 104 static int megaraid_mbox_get_max_sg(adapter_t *);
 105 static void megaraid_mbox_enum_raid_scsi(adapter_t *);
 106 static void megaraid_mbox_flush_cache(adapter_t *);
 107
 108 static void megaraid_mbox_display_scb(adapter_t *, scb_t *);
 109 static void megaraid_mbox_setup_device_map(adapter_t *);
 110
 111 static int megaraid_queue_command(struct scsi_cmnd *,
 112                 void (*)(struct scsi_cmnd *));
 113 static scb_t *megaraid_mbox_build_cmd(adapter_t *, struct scsi_cmnd *, int *);
 114 static void megaraid_mbox_runpendq(adapter_t *, scb_t *);
 115 static void megaraid_mbox_prepare_pthru(adapter_t *, scb_t *,
 116                 struct scsi_cmnd *);
 117 static void megaraid_mbox_prepare_epthru(adapter_t *, scb_t *,
 118                 struct scsi_cmnd *);
 119
 120 static irqreturn_t megaraid_isr(int, void *, struct pt_regs *);
 121
 122 static void megaraid_mbox_dpc(unsigned long);
 123
 124 static int megaraid_cmm_register(adapter_t *);
 125 static int megaraid_cmm_unregister(adapter_t *);
 126 static int megaraid_mbox_mm_handler(unsigned long, uioc_t *, uint32_t);
 127 static int megaraid_mbox_mm_command(adapter_t *, uioc_t *);
 128 static void megaraid_mbox_mm_done(adapter_t *, scb_t *);
 129 static int gather_hbainfo(adapter_t *, mraid_hba_info_t *);
 130 static int wait_till_fw_empty(adapter_t *);
 131
 132
 133
 134 MODULE_AUTHOR("LSI Logic Corporation");
 135 MODULE_DESCRIPTION("LSI Logic MegaRAID Mailbox Driver");
 136 MODULE_LICENSE("GPL");
 137 MODULE_VERSION(MEGARAID_VERSION);
 138
 139 /*
 140  * ### modules parameters for driver ###
 141  */
 142
 143 /**
 144  * Set to enable driver to expose unconfigured disk to kernel
 145  */
 146 static int megaraid_expose_unconf_disks = 0;
 147 module_param_named(unconf_disks, megaraid_expose_unconf_disks, int, 0);
 148 MODULE_PARM_DESC(unconf_disks,
 149         "Set to expose unconfigured disks to kernel (default=0)");
 150
 151 /**
 152  * driver wait time if the adapter's mailbox is busy
 153  */
 154 static unsigned int max_mbox_busy_wait = MBOX_BUSY_WAIT;
 155 module_param_named(busy_wait, max_mbox_busy_wait, int, 0);
 156 MODULE_PARM_DESC(busy_wait,
 157         "Max wait for mailbox in microseconds if busy (default=10)");
 158
 159 /**
 160  * number of sectors per IO command
 161  */
 162 static unsigned int megaraid_max_sectors = MBOX_MAX_SECTORS;
 163 module_param_named(max_sectors, megaraid_max_sectors, int, 0);
 164 MODULE_PARM_DESC(max_sectors,
 165         "Maximum number of sectors per IO command (default=128)");
 166
 167 /**
 168  * number of commands per logical unit
 169  */
 170 static unsigned int megaraid_cmd_per_lun = MBOX_DEF_CMD_PER_LUN;
 171 module_param_named(cmd_per_lun, megaraid_cmd_per_lun, int, 0);
 172 MODULE_PARM_DESC(cmd_per_lun,
 173         "Maximum number of commands per logical unit (default=64)");
 174
 175
 176 /**
 177  * Fast driver load option, skip scanning for physical devices during load.
 178  * This would result in non-disk devices being skipped during driver load
 179  * time. These can be later added though, using /proc/scsi/scsi
 180  */
 181 static unsigned int megaraid_fast_load = 0;
 182 module_param_named(fast_load, megaraid_fast_load, int, 0);
 183 MODULE_PARM_DESC(fast_load,
 184         "Faster loading of the driver, skips physical devices! (default=0)");
 185
 186
 187 /**
 188  * mraid_debug level - threshold for amount of information to be displayed by
 189  * the driver. This level can be changed through modules parameters, ioctl or
 190  * sysfs/proc interface. By default, print the announcement messages only.
 191  */
 192 int mraid_debug_level = CL_ANN;
 193 module_param_named(debug_level, mraid_debug_level, int, 0);
 194 MODULE_PARM_DESC(debug_level, "Debug level for driver (default=0)");
 195
 196 /*
 197  * ### global data ###
 198  */
 199 static uint8_t megaraid_mbox_version[8] =
 200         { 0x02, 0x20, 0x04, 0x00, 9, 27, 20, 4 };
 201
 202
 203 /*
 204  * PCI table for all supported controllers.
 205  */
 206 static struct pci_device_id pci_id_table_g[] =  {
 207         {
 208                 PCI_VENDOR_ID_DELL,
 209                 PCI_DEVICE_ID_PERC4_DI_DISCOVERY,
 210                 PCI_VENDOR_ID_DELL,
 211                 PCI_SUBSYS_ID_PERC4_DI_DISCOVERY,
 212         },
 213         {
 214                 PCI_VENDOR_ID_LSI_LOGIC,
 215                 PCI_DEVICE_ID_PERC4_SC,
 216                 PCI_VENDOR_ID_DELL,
 217                 PCI_SUBSYS_ID_PERC4_SC,
 218         },
 219         {
 220                 PCI_VENDOR_ID_LSI_LOGIC,
 221                 PCI_DEVICE_ID_PERC4_DC,
 222                 PCI_VENDOR_ID_DELL,
 223                 PCI_SUBSYS_ID_PERC4_DC,
 224         },
 225         {
 226                 PCI_VENDOR_ID_LSI_LOGIC,
 227                 PCI_DEVICE_ID_PERC4_QC,
 228                 PCI_VENDOR_ID_DELL,
 229                 PCI_SUBSYS_ID_PERC4_QC,
 230         },
 231         {
 232                 PCI_VENDOR_ID_DELL,
 233                 PCI_DEVICE_ID_PERC4_DI_EVERGLADES,
 234                 PCI_VENDOR_ID_DELL,
 235                 PCI_SUBSYS_ID_PERC4_DI_EVERGLADES,
 236         },
 237         {
 238                 PCI_VENDOR_ID_DELL,
 239                 PCI_DEVICE_ID_PERC4E_SI_BIGBEND,
 240                 PCI_VENDOR_ID_DELL,
 241                 PCI_SUBSYS_ID_PERC4E_SI_BIGBEND,
 242         },
 243         {
 244                 PCI_VENDOR_ID_DELL,
 245                 PCI_DEVICE_ID_PERC4E_DI_KOBUK,
 246                 PCI_VENDOR_ID_DELL,
 247                 PCI_SUBSYS_ID_PERC4E_DI_KOBUK,
 248         },
 249         {
 250                 PCI_VENDOR_ID_DELL,
 251                 PCI_DEVICE_ID_PERC4E_DI_CORVETTE,
 252                 PCI_VENDOR_ID_DELL,
 253                 PCI_SUBSYS_ID_PERC4E_DI_CORVETTE,
 254         },
 255         {
 256                 PCI_VENDOR_ID_DELL,
 257                 PCI_DEVICE_ID_PERC4E_DI_EXPEDITION,
 258                 PCI_VENDOR_ID_DELL,
 259                 PCI_SUBSYS_ID_PERC4E_DI_EXPEDITION,
 260         },
 261         {
 262                 PCI_VENDOR_ID_DELL,
 263                 PCI_DEVICE_ID_PERC4E_DI_GUADALUPE,
 264                 PCI_VENDOR_ID_DELL,
 265                 PCI_SUBSYS_ID_PERC4E_DI_GUADALUPE,
 266         },
 267         {
 268                 PCI_VENDOR_ID_LSI_LOGIC,
 269                 PCI_DEVICE_ID_PERC4E_DC_320_2E,
 270                 PCI_VENDOR_ID_DELL,
 271                 PCI_SUBSYS_ID_PERC4E_DC_320_2E,
 272         },
 273         {
 274                 PCI_VENDOR_ID_LSI_LOGIC,
 275                 PCI_DEVICE_ID_PERC4E_SC_320_1E,
 276                 PCI_VENDOR_ID_DELL,
 277                 PCI_SUBSYS_ID_PERC4E_SC_320_1E,
 278         },
 279         {
 280                 PCI_VENDOR_ID_AMI,
 281                 PCI_DEVICE_ID_AMI_MEGARAID3,
 282                 PCI_VENDOR_ID_DELL,
 283                 PCI_SUBSYS_ID_PERC3_QC,
 284         },
 285         {
 286                 PCI_VENDOR_ID_AMI,
 287                 PCI_DEVICE_ID_AMI_MEGARAID3,
 288                 PCI_VENDOR_ID_DELL,
 289                 PCI_SUBSYS_ID_PERC3_DC,
 290         },
 291         {
 292                 PCI_VENDOR_ID_AMI,
 293                 PCI_DEVICE_ID_AMI_MEGARAID3,
 294                 PCI_VENDOR_ID_DELL,
 295                 PCI_SUBSYS_ID_PERC3_SC,
 296         },
 297         {
 298                 PCI_VENDOR_ID_LSI_LOGIC,
 299                 PCI_DEVICE_ID_MEGARAID_SCSI_320_0,
 300                 PCI_VENDOR_ID_LSI_LOGIC,
 301                 PCI_SUBSYS_ID_MEGARAID_SCSI_320_0,
 302         },
 303         {
 304                 PCI_VENDOR_ID_LSI_LOGIC,
 305                 PCI_DEVICE_ID_MEGARAID_SCSI_320_1,
 306                 PCI_VENDOR_ID_LSI_LOGIC,
 307                 PCI_SUBSYS_ID_MEGARAID_SCSI_320_1,
 308         },
 309         {
 310                 PCI_VENDOR_ID_LSI_LOGIC,
 311                 PCI_DEVICE_ID_MEGARAID_SCSI_320_2,
 312                 PCI_VENDOR_ID_LSI_LOGIC,
 313                 PCI_SUBSYS_ID_MEGARAID_SCSI_320_2,
 314         },
 315         {
 316                 PCI_VENDOR_ID_LSI_LOGIC,
 317                 PCI_DEVICE_ID_MEGARAID_SCSI_320_0x,
 318                 PCI_VENDOR_ID_LSI_LOGIC,
 319                 PCI_SUBSYS_ID_MEGARAID_SCSI_320_0x,
 320         },
 321         {
 322                 PCI_VENDOR_ID_LSI_LOGIC,
 323                 PCI_DEVICE_ID_MEGARAID_SCSI_320_2x,
 324                 PCI_VENDOR_ID_LSI_LOGIC,
 325                 PCI_SUBSYS_ID_MEGARAID_SCSI_320_2x,
 326         },
 327         {
 328                 PCI_VENDOR_ID_LSI_LOGIC,
 329                 PCI_DEVICE_ID_MEGARAID_SCSI_320_4x,
 330                 PCI_VENDOR_ID_LSI_LOGIC,
 331                 PCI_SUBSYS_ID_MEGARAID_SCSI_320_4x,
 332         },
 333         {
 334                 PCI_VENDOR_ID_LSI_LOGIC,
 335                 PCI_DEVICE_ID_MEGARAID_SCSI_320_1E,
 336                 PCI_VENDOR_ID_LSI_LOGIC,
 337                 PCI_SUBSYS_ID_MEGARAID_SCSI_320_1E,
 338         },
 339         {
 340                 PCI_VENDOR_ID_LSI_LOGIC,
 341                 PCI_DEVICE_ID_MEGARAID_SCSI_320_2E,
 342                 PCI_VENDOR_ID_LSI_LOGIC,
 343                 PCI_SUBSYS_ID_MEGARAID_SCSI_320_2E,
 344         },
 345         {
 346                 PCI_VENDOR_ID_LSI_LOGIC,
 347                 PCI_DEVICE_ID_MEGARAID_I4_133_RAID,
 348                 PCI_VENDOR_ID_LSI_LOGIC,
 349                 PCI_SUBSYS_ID_MEGARAID_I4_133_RAID,
 350         },
 351         {
 352                 PCI_VENDOR_ID_LSI_LOGIC,
 353                 PCI_DEVICE_ID_MEGARAID_SATA_150_4,
 354                 PCI_VENDOR_ID_LSI_LOGIC,
 355                 PCI_SUBSYS_ID_MEGARAID_SATA_150_4,
 356         },
 357         {
 358                 PCI_VENDOR_ID_LSI_LOGIC,
 359                 PCI_DEVICE_ID_MEGARAID_SATA_150_6,
 360                 PCI_VENDOR_ID_LSI_LOGIC,
 361                 PCI_SUBSYS_ID_MEGARAID_SATA_150_6,
 362         },
 363         {
 364                 PCI_VENDOR_ID_LSI_LOGIC,
 365                 PCI_DEVICE_ID_MEGARAID_SATA_300_4x,
 366                 PCI_VENDOR_ID_LSI_LOGIC,
 367                 PCI_SUBSYS_ID_MEGARAID_SATA_300_4x,
 368         },
 369         {
 370                 PCI_VENDOR_ID_LSI_LOGIC,
 371                 PCI_DEVICE_ID_MEGARAID_SATA_300_8x,
 372                 PCI_VENDOR_ID_LSI_LOGIC,
 373                 PCI_SUBSYS_ID_MEGARAID_SATA_300_8x,
 374         },
 375         {
 376                 PCI_VENDOR_ID_LSI_LOGIC,
 377                 PCI_DEVICE_ID_INTEL_RAID_SRCU42X,
 378                 PCI_VENDOR_ID_INTEL,
 379                 PCI_SUBSYS_ID_INTEL_RAID_SRCU42X,
 380         },
 381         {
 382                 PCI_VENDOR_ID_LSI_LOGIC,
 383                 PCI_DEVICE_ID_INTEL_RAID_SRCS16,
 384                 PCI_VENDOR_ID_INTEL,
 385                 PCI_SUBSYS_ID_INTEL_RAID_SRCS16,
 386         },
 387         {
 388                 PCI_VENDOR_ID_LSI_LOGIC,
 389                 PCI_DEVICE_ID_INTEL_RAID_SRCU42E,
 390                 PCI_VENDOR_ID_INTEL,
 391                 PCI_SUBSYS_ID_INTEL_RAID_SRCU42E,
 392         },
 393         {
 394                 PCI_VENDOR_ID_LSI_LOGIC,
 395                 PCI_DEVICE_ID_INTEL_RAID_SRCZCRX,
 396                 PCI_VENDOR_ID_INTEL,
 397                 PCI_SUBSYS_ID_INTEL_RAID_SRCZCRX,
 398         },
 399         {
 400                 PCI_VENDOR_ID_LSI_LOGIC,
 401                 PCI_DEVICE_ID_INTEL_RAID_SRCS28X,
 402                 PCI_VENDOR_ID_INTEL,
 403                 PCI_SUBSYS_ID_INTEL_RAID_SRCS28X,
 404         },
 405         {
 406                 PCI_VENDOR_ID_LSI_LOGIC,
 407                 PCI_DEVICE_ID_INTEL_RAID_SROMBU42E_ALIEF,
 408                 PCI_VENDOR_ID_INTEL,
 409                 PCI_SUBSYS_ID_INTEL_RAID_SROMBU42E_ALIEF,
 410         },
 411         {
 412                 PCI_VENDOR_ID_LSI_LOGIC,
 413                 PCI_DEVICE_ID_INTEL_RAID_SROMBU42E_HARWICH,
 414                 PCI_VENDOR_ID_INTEL,
 415                 PCI_SUBSYS_ID_INTEL_RAID_SROMBU42E_HARWICH,
 416         },
 417         {
 418                 PCI_VENDOR_ID_LSI_LOGIC,
 419                 PCI_DEVICE_ID_INTEL_RAID_SRCU41L_LAKE_SHETEK,
 420                 PCI_VENDOR_ID_INTEL,
 421                 PCI_SUBSYS_ID_INTEL_RAID_SRCU41L_LAKE_SHETEK,
 422         },
 423         {
 424                 PCI_VENDOR_ID_LSI_LOGIC,
 425                 PCI_DEVICE_ID_FSC_MEGARAID_PCI_EXPRESS_ROMB,
 426                 PCI_SUBSYS_ID_FSC,
 427                 PCI_SUBSYS_ID_FSC_MEGARAID_PCI_EXPRESS_ROMB,
 428         },
 429         {
 430                 PCI_VENDOR_ID_LSI_LOGIC,
 431                 PCI_DEVICE_ID_MEGARAID_ACER_ROMB_2E,
 432                 PCI_VENDOR_ID_AI,
 433                 PCI_SUBSYS_ID_MEGARAID_ACER_ROMB_2E,
 434         },
 435         {0}     /* Terminating entry */
 436 };
 437 MODULE_DEVICE_TABLE(pci, pci_id_table_g);
 438
 439
 440 static struct pci_driver megaraid_pci_driver_g = {
 441         .name           = "megaraid",
 442         .id_table       = pci_id_table_g,
 443         .probe          = megaraid_probe_one,
 444         .remove         = __devexit_p(megaraid_detach_one),
 445         .driver         = {
 446                 .shutdown       = megaraid_mbox_shutdown,
 447         }
 448 };
 449
 450
 451 /*
 452  * Scsi host template for megaraid unified driver
 453  */
 454 static struct scsi_host_template megaraid_template_g = {
 455         .module                         = THIS_MODULE,
 456         .name                           = "LSI Logic MegaRAID driver",
 457         .proc_name                      = "megaraid",
 458         .queuecommand                   = megaraid_queue_command,
 459         .eh_abort_handler               = megaraid_abort_handler,
 460         .eh_device_reset_handler        = megaraid_reset_handler,
 461         .eh_bus_reset_handler           = megaraid_reset_handler,
 462         .eh_host_reset_handler          = megaraid_reset_handler,
 463         .use_clustering                 = ENABLE_CLUSTERING,
 464 };
 465
 466
 467 /**
 468  * megaraid_init - module load hook
 469  *
 470  * We register ourselves as hotplug enabled module and let PCI subsystem
 471  * discover our adaters
 472  **/
 473 static int __init
 474 megaraid_init(void)
 475 {
 476         int     rval;
 477
 478         // Announce the driver version
 479         con_log(CL_ANN, (KERN_INFO "megaraid: %s %s\n", MEGARAID_VERSION,
 480                 MEGARAID_EXT_VERSION));
 481
 482         // check validity of module parameters
 483         if (megaraid_cmd_per_lun > MBOX_MAX_SCSI_CMDS) {
 484
 485                 con_log(CL_ANN, (KERN_WARNING
 486                         "megaraid mailbox: max commands per lun reset to %d\n",
 487                         MBOX_MAX_SCSI_CMDS));
 488
 489                 megaraid_cmd_per_lun = MBOX_MAX_SCSI_CMDS;
 490         }
 491
 492
 493         // register as a PCI hot-plug driver module
 494         if ((rval = pci_module_init(&megaraid_pci_driver_g))) {
 495                 con_log(CL_ANN, (KERN_WARNING
 496                         "megaraid: could not register hotplug support.\n"));
 497         }
 498
 499         return rval;
 500 }
 501
 502
 503 /**
 504  * megaraid_exit - driver unload entry point
 505  *
 506  * We simply unwrap the megaraid_init routine here
 507  */
 508 static void __exit
 509 megaraid_exit(void)
 510 {
 511         con_log(CL_DLEVEL1, (KERN_NOTICE "megaraid: unloading framework\n"));
 512
 513         // unregister as PCI hotplug driver
 514         pci_unregister_driver(&megaraid_pci_driver_g);
 515
 516         return;
 517 }
 518
 519
 520 /**
 521  * megaraid_probe_one - PCI hotplug entry point
 522  * @param pdev  : handle to this controller's PCI configuration space
 523  * @param id    : pci device id of the class of controllers
 524  *
 525  * This routine should be called whenever a new adapter is detected by the
 526  * PCI hotplug susbsytem.
 527  **/
 528 static int __devinit
 529 megaraid_probe_one(struct pci_dev *pdev, const struct pci_device_id *id)
 530 {
 531         adapter_t       *adapter;
 532
 533
 534         // detected a new controller
 535         con_log(CL_ANN, (KERN_INFO
 536                 "megaraid: probe new device %#4.04x:%#4.04x:%#4.04x:%#4.04x: ",
 537                 pdev->vendor, pdev->device, pdev->subsystem_vendor,
 538                 pdev->subsystem_device));
 539
 540         con_log(CL_ANN, ("bus %d:slot %d:func %d\n", pdev->bus->number,
 541                 PCI_SLOT(pdev->devfn), PCI_FUNC(pdev->devfn)));
 542
 543         if (pci_enable_device(pdev)) {
 544                 con_log(CL_ANN, (KERN_WARNING
 545                                 "megaraid: pci_enable_device failed\n"));
 546
 547                 return -ENODEV;
 548         }
 549
 550         // Enable bus-mastering on this controller
 551         pci_set_master(pdev);
 552
 553         // Allocate the per driver initialization structure
 554         adapter = kmalloc(sizeof(adapter_t), GFP_KERNEL);
 555
 556         if (adapter == NULL) {
 557                 con_log(CL_ANN, (KERN_WARNING
 558                 "megaraid: out of memory, %s %d.\n", __FUNCTION__, __LINE__));
 559
 560                 goto out_probe_one;
 561         }
 562         memset(adapter, 0, sizeof(adapter_t));
 563
 564
 565         // set up PCI related soft state and other pre-known parameters
 566         adapter->unique_id      = pdev->bus->number << 8 | pdev->devfn;
 567         adapter->irq            = pdev->irq;
 568         adapter->pdev           = pdev;
 569
 570         atomic_set(&adapter->being_detached, 0);
 571
 572         // Setup the default DMA mask. This would be changed later on
 573         // depending on hardware capabilities
 574         if (pci_set_dma_mask(adapter->pdev, 0xFFFFFFFF) != 0) {
 575
 576                 con_log(CL_ANN, (KERN_WARNING
 577                         "megaraid: pci_set_dma_mask failed:%d\n", __LINE__));
 578
 579                 goto out_free_adapter;
 580         }
 581
 582
 583         // Initialize the synchronization lock for kernel and LLD
 584         spin_lock_init(&adapter->lock);
 585         adapter->host_lock = &adapter->lock;
 586
 587
 588         // Initialize the command queues: the list of free SCBs and the list
 589         // of pending SCBs.
 590         INIT_LIST_HEAD(&adapter->kscb_pool);
 591         spin_lock_init(SCSI_FREE_LIST_LOCK(adapter));
 592
 593         INIT_LIST_HEAD(&adapter->pend_list);
 594         spin_lock_init(PENDING_LIST_LOCK(adapter));
 595
 596         INIT_LIST_HEAD(&adapter->completed_list);
 597         spin_lock_init(COMPLETED_LIST_LOCK(adapter));
 598
 599
 600         // Start the mailbox based controller
 601         if (megaraid_init_mbox(adapter) != 0) {
 602                 con_log(CL_ANN, (KERN_WARNING
 603                         "megaraid: maibox adapter did not initialize\n"));
 604
 605                 goto out_free_adapter;
 606         }
 607
 608         // Register with LSI Common Management Module
 609         if (megaraid_cmm_register(adapter) != 0) {
 610
 611                 con_log(CL_ANN, (KERN_WARNING
 612                 "megaraid: could not register with management module\n"));
 613
 614                 goto out_fini_mbox;
 615         }
 616
 617         // setup adapter handle in PCI soft state
 618         pci_set_drvdata(pdev, adapter);
 619
 620         // attach with scsi mid-layer
 621         if (megaraid_io_attach(adapter) != 0) {
 622
 623                 con_log(CL_ANN, (KERN_WARNING "megaraid: io attach failed\n"));
 624
 625                 goto out_cmm_unreg;
 626         }
 627
 628         return 0;
 629
 630 out_cmm_unreg:
 631         pci_set_drvdata(pdev, NULL);
 632         megaraid_cmm_unregister(adapter);
 633 out_fini_mbox:
 634         megaraid_fini_mbox(adapter);
 635 out_free_adapter:
 636         kfree(adapter);
 637 out_probe_one:
 638         pci_disable_device(pdev);
 639
 640         return -ENODEV;
 641 }
 642
 643
 644 /**
 645  * megaraid_detach_one - release the framework resources and call LLD release
 646  * routine
 647  * @param pdev  : handle for our PCI cofiguration space
 648  *
 649  * This routine is called during driver unload. We free all the allocated
 650  * resources and call the corresponding LLD so that it can also release all
 651  * its resources.
 652  *
 653  * This routine is also called from the PCI hotplug system
 654  **/
 655 static void
 656 megaraid_detach_one(struct pci_dev *pdev)
 657 {
 658         adapter_t               *adapter;
 659         struct Scsi_Host        *host;
 660
 661
 662         // Start a rollback on this adapter
 663         adapter = pci_get_drvdata(pdev);
 664
 665         if (!adapter) {
 666                 con_log(CL_ANN, (KERN_CRIT
 667                 "megaraid: Invalid detach on %#4.04x:%#4.04x:%#4.04x:%#4.04x\n",
 668                         pdev->vendor, pdev->device, pdev->subsystem_vendor,
 669                         pdev->subsystem_device));
 670
 671                 return;
 672         }
 673         else {
 674                 con_log(CL_ANN, (KERN_NOTICE
 675                 "megaraid: detaching device %#4.04x:%#4.04x:%#4.04x:%#4.04x\n",
 676                         pdev->vendor, pdev->device, pdev->subsystem_vendor,
 677                         pdev->subsystem_device));
 678         }
 679
 680
 681         host = adapter->host;
 682
 683         // do not allow any more requests from the management module for this
 684         // adapter.
 685         // FIXME: How do we account for the request which might still be
 686         // pending with us?
 687         atomic_set(&adapter->being_detached, 1);
 688
 689         // detach from the IO sub-system
 690         megaraid_io_detach(adapter);
 691
 692         // reset the device state in the PCI structure. We check this
 693         // condition when we enter here. If the device state is NULL,
 694         // that would mean the device has already been removed
 695         pci_set_drvdata(pdev, NULL);
 696
 697         // Unregister from common management module
 698         //
 699         // FIXME: this must return success or failure for conditions if there
 700         // is a command pending with LLD or not.
 701         megaraid_cmm_unregister(adapter);
 702
 703         // finalize the mailbox based controller and release all resources
 704         megaraid_fini_mbox(adapter);
 705
 706         kfree(adapter);
 707
 708         scsi_host_put(host);
 709
 710         pci_disable_device(pdev);
 711
 712         return;
 713 }
 714
 715
 716 /**
 717  * megaraid_mbox_shutdown - PCI shutdown for megaraid HBA
 718  * @param device        : generice driver model device
 719  *
 720  * Shutdown notification, perform flush cache
 721  */
 722 static void
 723 megaraid_mbox_shutdown(struct device *device)
 724 {
 725         adapter_t               *adapter = pci_get_drvdata(to_pci_dev(device));
 726         static int              counter;
 727
 728         if (!adapter) {
 729                 con_log(CL_ANN, (KERN_WARNING
 730                         "megaraid: null device in shutdown\n"));
 731                 return;
 732         }
 733
 734         // flush caches now
 735         con_log(CL_ANN, (KERN_INFO "megaraid: flushing adapter %d...",
 736                 counter++));
 737
 738         megaraid_mbox_flush_cache(adapter);
 739
 740         con_log(CL_ANN, ("done\n"));
 741 }
 742
 743
 744 /**
 745  * megaraid_io_attach - attach a device with the IO subsystem
 746  * @param adapter       : controller's soft state
 747  *
 748  * Attach this device with the IO subsystem
 749  **/
 750 static int
 751 megaraid_io_attach(adapter_t *adapter)
 752 {
 753         struct Scsi_Host        *host;
 754
 755         // Initialize SCSI Host structure
 756         host = scsi_host_alloc(&megaraid_template_g, 8);
 757         if (!host) {
 758                 con_log(CL_ANN, (KERN_WARNING
 759                         "megaraid mbox: scsi_register failed\n"));
 760
 761                 return -1;
 762         }
 763
 764         SCSIHOST2ADAP(host)     = (caddr_t)adapter;
 765         adapter->host           = host;
 766
 767         // export the parameters required by the mid-layer
 768         scsi_assign_lock(host, adapter->host_lock);
 769         scsi_set_device(host, &adapter->pdev->dev);
 770
 771         host->irq               = adapter->irq;
 772         host->unique_id         = adapter->unique_id;
 773         host->can_queue         = adapter->max_cmds;
 774         host->this_id           = adapter->init_id;
 775         host->sg_tablesize      = adapter->sglen;
 776         host->max_sectors       = adapter->max_sectors;
 777         host->cmd_per_lun       = adapter->cmd_per_lun;
 778         host->max_channel       = adapter->max_channel;
 779         host->max_id            = adapter->max_target;
 780         host->max_lun           = adapter->max_lun;
 781
 782
 783         // notify mid-layer about the new controller
 784         if (scsi_add_host(host, &adapter->pdev->dev)) {
 785
 786                 con_log(CL_ANN, (KERN_WARNING
 787                         "megaraid mbox: scsi_add_host failed\n"));
 788
 789                 scsi_host_put(host);
 790
 791                 return -1;
 792         }
 793
 794         scsi_scan_host(host);
 795
 796         return 0;
 797 }
 798
 799
 800 /**
 801  * megaraid_io_detach - detach a device from the IO subsystem
 802  * @param adapter       : controller's soft state
 803  *
 804  * Detach this device from the IO subsystem
 805  **/
 806 static void
 807 megaraid_io_detach(adapter_t *adapter)
 808 {
 809         struct Scsi_Host        *host;
 810
 811         con_log(CL_DLEVEL1, (KERN_INFO "megaraid: io detach\n"));
 812
 813         host = adapter->host;
 814
 815         scsi_remove_host(host);
 816
 817         return;
 818 }
 819
 820
 821 /*
 822  * START: Mailbox Low Level Driver
 823  *
 824  * This is section specific to the single mailbox based controllers
 825  */
 826
 827 /**
 828  * megaraid_init_mbox - initialize controller
 829  * @param adapter       - our soft state
 830  *
 831  * . Allocate 16-byte aligned mailbox memory for firmware handshake
 832  * . Allocate controller's memory resources
 833  * . Find out all initialization data
 834  * . Allocate memory required for all the commands
 835  * . Use internal library of FW routines, build up complete soft state
 836  */
 837 static int __init
 838 megaraid_init_mbox(adapter_t *adapter)
 839 {
 840         struct pci_dev          *pdev;
 841         mraid_device_t          *raid_dev;
 842         int                     i;
 843
 844
 845         adapter->ito    = MBOX_TIMEOUT;
 846         pdev            = adapter->pdev;
 847
 848         /*
 849          * Allocate and initialize the init data structure for mailbox
 850          * controllers
 851          */
 852         raid_dev = kmalloc(sizeof(mraid_device_t), GFP_KERNEL);
 853         if (raid_dev == NULL) return -1;
 854
 855         memset(raid_dev, 0, sizeof(mraid_device_t));
 856
 857         /*
 858          * Attach the adapter soft state to raid device soft state
 859          */
 860         adapter->raid_device    = (caddr_t)raid_dev;
 861         raid_dev->fast_load     = megaraid_fast_load;
 862
 863
 864         // our baseport
 865         raid_dev->baseport = pci_resource_start(pdev, 0);
 866
 867         if (pci_request_regions(pdev, "MegaRAID: LSI Logic Corporation") != 0) {
 868
 869                 con_log(CL_ANN, (KERN_WARNING
 870                                 "megaraid: mem region busy\n"));
 871
 872                 goto out_free_raid_dev;
 873         }
 874
 875         raid_dev->baseaddr = (unsigned long)
 876                         ioremap_nocache(raid_dev->baseport, 128);
 877
 878         if (!raid_dev->baseaddr) {
 879
 880                 con_log(CL_ANN, (KERN_WARNING
 881                         "megaraid: could not map hba memory\n") );
 882
 883                 goto out_release_regions;
 884         }
 885
 886         //
 887         // Setup the rest of the soft state using the library of FW routines
 888         //
 889
 890         // request IRQ and register the interrupt service routine
 891         if (request_irq(adapter->irq, megaraid_isr, SA_SHIRQ, "megaraid",
 892                 adapter)) {
 893
 894                 con_log(CL_ANN, (KERN_WARNING
 895                         "megaraid: Couldn't register IRQ %d!\n", adapter->irq));
 896
 897                 goto out_iounmap;
 898         }
 899
 900
 901         // initialize the mutual exclusion lock for the mailbox
 902         spin_lock_init(&raid_dev->mailbox_lock);
 903
 904         // allocate memory required for commands
 905         if (megaraid_alloc_cmd_packets(adapter) != 0) {
 906                 goto out_free_irq;
 907         }
 908
 909         // Product info
 910         if (megaraid_mbox_product_info(adapter) != 0) {
 911                 goto out_alloc_cmds;
 912         }
 913
 914         // Do we support extended CDBs
 915         adapter->max_cdb_sz = 10;
 916         if (megaraid_mbox_extended_cdb(adapter) == 0) {
 917                 adapter->max_cdb_sz = 16;
 918         }
 919
 920         /*
 921          * Do we support cluster environment, if we do, what is the initiator
 922          * id.
 923          * NOTE: In a non-cluster aware firmware environment, the LLD should
 924          * return 7 as initiator id.
 925          */
 926         adapter->ha             = 0;
 927         adapter->init_id        = -1;
 928         if (megaraid_mbox_support_ha(adapter, &adapter->init_id) == 0) {
 929                 adapter->ha = 1;
 930         }
 931
 932         /*
 933          * Prepare the device ids array to have the mapping between the kernel
 934          * device address and megaraid device address.
 935          * We export the physical devices on their actual addresses. The
 936          * logical drives are exported on a virtual SCSI channel
 937          */
 938         megaraid_mbox_setup_device_map(adapter);
 939
 940         // If the firmware supports random deletion, update the device id map
 941         if (megaraid_mbox_support_random_del(adapter)) {
 942
 943                 // Change the logical drives numbers in device_ids array one
 944                 // slot in device_ids is reserved for target id, that's why
 945                 // "<=" below
 946                 for (i = 0; i <= MAX_LOGICAL_DRIVES_40LD; i++) {
 947                         adapter->device_ids[adapter->max_channel][i] += 0x80;
 948                 }
 949                 adapter->device_ids[adapter->max_channel][adapter->init_id] =
 950                         0xFF;
 951         }
 952
 953         /*
 954          * find out the maximum number of scatter-gather elements supported by
 955          * this firmware
 956          */
 957         adapter->sglen = megaraid_mbox_get_max_sg(adapter);
 958
 959         // enumerate RAID and SCSI channels so that all devices on SCSI
 960         // channels can later be exported, including disk devices
 961         megaraid_mbox_enum_raid_scsi(adapter);
 962
 963         /*
 964          * Other parameters required by upper layer
 965          *
 966          * maximum number of sectors per IO command
 967          */
 968         adapter->max_sectors = megaraid_max_sectors;
 969
 970         /*
 971          * number of queued commands per LUN.
 972          */
 973         adapter->cmd_per_lun = megaraid_cmd_per_lun;
 974
 975         // Set the DMA mask to 64-bit. All supported controllers as capable of
 976         // DMA in this range
 977         if (pci_set_dma_mask(adapter->pdev, 0xFFFFFFFFFFFFFFFFULL) != 0) {
 978
 979                 con_log(CL_ANN, (KERN_WARNING
 980                         "megaraid: could not set DMA mask for 64-bit.\n"));
 981
 982                 goto out_alloc_cmds;
 983         }
 984
 985         // setup tasklet for DPC
 986         tasklet_init(&adapter->dpc_h, megaraid_mbox_dpc,
 987                         (unsigned long)adapter);
 988
 989         con_log(CL_DLEVEL1, (KERN_INFO
 990                 "megaraid mbox hba successfully initialized\n"));
 991
 992         return 0;
 993
 994 out_alloc_cmds:
 995         megaraid_free_cmd_packets(adapter);
 996 out_free_irq:
 997         free_irq(adapter->irq, adapter);
 998 out_iounmap:
 999         iounmap((caddr_t)raid_dev->baseaddr);
1000 out_release_regions:
1001         pci_release_regions(pdev);
1002 out_free_raid_dev:
1003         kfree(raid_dev);
1004
1005         return -1;
1006 }
1007
1008
1009 /**
1010  * megaraid_fini_mbox - undo controller initialization
1011  * @param adapter       : our soft state
1012  */
1013 static void
1014 megaraid_fini_mbox(adapter_t *adapter)
1015 {
1016         mraid_device_t *raid_dev = ADAP2RAIDDEV(adapter);
1017
1018         // flush all caches
1019         megaraid_mbox_flush_cache(adapter);
1020
1021         tasklet_kill(&adapter->dpc_h);
1022
1023         megaraid_free_cmd_packets(adapter);
1024
1025         free_irq(adapter->irq, adapter);
1026
1027         iounmap((caddr_t)raid_dev->baseaddr);
1028
1029         pci_release_regions(adapter->pdev);
1030
1031         kfree(raid_dev);
1032
1033         return;
1034 }
1035
1036
1037 /**
1038  * megaraid_alloc_cmd_packets - allocate shared mailbox
1039  * @param adapter       : soft state of the raid controller
1040  *
1041  * Allocate and align the shared mailbox. This maibox is used to issue
1042  * all the commands. For IO based controllers, the mailbox is also regsitered
1043  * with the FW. Allocate memory for all commands as well.
1044  * This is our big allocator
1045  */
1046 static int
1047 megaraid_alloc_cmd_packets(adapter_t *adapter)
1048 {
1049         mraid_device_t          *raid_dev = ADAP2RAIDDEV(adapter);
1050         struct pci_dev          *pdev;
1051         unsigned long           align;
1052         scb_t                   *scb;
1053         mbox_ccb_t              *ccb;
1054         struct mraid_pci_blk    *epthru_pci_blk;
1055         struct mraid_pci_blk    *sg_pci_blk;
1056         struct mraid_pci_blk    *mbox_pci_blk;
1057         int                     i;
1058
1059         pdev = adapter->pdev;
1060
1061         /*
1062          * Setup the mailbox
1063          * Allocate the common 16-byte aligned memory for the handshake
1064          * mailbox.
1065          */
1066         raid_dev->una_mbox64 = pci_alloc_consistent(adapter->pdev,
1067                         sizeof(mbox64_t), &raid_dev->una_mbox64_dma);
1068
1069         if (!raid_dev->una_mbox64) {
1070                 con_log(CL_ANN, (KERN_WARNING
1071                         "megaraid: out of memory, %s %d\n", __FUNCTION__,
1072                         __LINE__));
1073                 return -1;
1074         }
1075         memset(raid_dev->una_mbox64, 0, sizeof(mbox64_t));
1076
1077         /*
1078          * Align the mailbox at 16-byte boundary
1079          */
1080         raid_dev->mbox  = &raid_dev->una_mbox64->mbox32;
1081
1082         raid_dev->mbox  = (mbox_t *)((((unsigned long)raid_dev->mbox) + 15) &
1083                                 (~0UL ^ 0xFUL));
1084
1085         raid_dev->mbox64 = (mbox64_t *)(((unsigned long)raid_dev->mbox) - 8);
1086
1087         align = ((void *)raid_dev->mbox -
1088                         ((void *)&raid_dev->una_mbox64->mbox32));
1089
1090         raid_dev->mbox_dma = (unsigned long)raid_dev->una_mbox64_dma + 8 +
1091                         align;
1092
1093         // Allocate memory for commands issued internally
1094         adapter->ibuf = pci_alloc_consistent(pdev, MBOX_IBUF_SIZE,
1095                                 &adapter->ibuf_dma_h);
1096         if (!adapter->ibuf) {
1097
1098                 con_log(CL_ANN, (KERN_WARNING
1099                         "megaraid: out of memory, %s %d\n", __FUNCTION__,
1100                         __LINE__));
1101
1102                 goto out_free_common_mbox;
1103         }
1104         memset(adapter->ibuf, 0, MBOX_IBUF_SIZE);
1105
1106         // Allocate memory for our SCSI Command Blocks and their associated
1107         // memory
1108
1109         /*
1110          * Allocate memory for the base list of scb. Later allocate memory for
1111          * CCBs and embedded components of each CCB and point the pointers in
1112          * scb to the allocated components
1113          * NOTE: The code to allocate SCB will be duplicated in all the LLD
1114          * since the calling routine does not yet know the number of available
1115          * commands.
1116          */
1117         adapter->kscb_list = kmalloc(sizeof(scb_t) * MBOX_MAX_SCSI_CMDS,
1118                         GFP_KERNEL);
1119
1120         if (adapter->kscb_list == NULL) {
1121                 con_log(CL_ANN, (KERN_WARNING
1122                         "megaraid: out of memory, %s %d\n", __FUNCTION__,
1123                         __LINE__));
1124                 goto out_free_ibuf;
1125         }
1126         memset(adapter->kscb_list, 0, sizeof(scb_t) * MBOX_MAX_SCSI_CMDS);
1127
1128         // memory allocation for our command packets
1129         if (megaraid_mbox_setup_dma_pools(adapter) != 0) {
1130                 con_log(CL_ANN, (KERN_WARNING
1131                         "megaraid: out of memory, %s %d\n", __FUNCTION__,
1132                         __LINE__));
1133                 goto out_free_scb_list;
1134         }
1135
1136         // Adjust the scb pointers and link in the free pool
1137         epthru_pci_blk  = raid_dev->epthru_pool;
1138         sg_pci_blk      = raid_dev->sg_pool;
1139         mbox_pci_blk    = raid_dev->mbox_pool;
1140
1141         for (i = 0; i < MBOX_MAX_SCSI_CMDS; i++) {
1142                 scb                     = adapter->kscb_list + i;
1143                 ccb                     = raid_dev->ccb_list + i;
1144
1145                 ccb->mbox       = (mbox_t *)(mbox_pci_blk[i].vaddr + 16);
1146                 ccb->raw_mbox   = (uint8_t *)ccb->mbox;
1147                 ccb->mbox64     = (mbox64_t *)(mbox_pci_blk[i].vaddr + 8);
1148                 ccb->mbox_dma_h = (unsigned long)mbox_pci_blk[i].dma_addr + 16;
1149
1150                 // make sure the mailbox is aligned properly
1151                 if (ccb->mbox_dma_h & 0x0F) {
1152                         con_log(CL_ANN, (KERN_CRIT
1153                                 "megaraid mbox: not aligned on 16-bytes\n"));
1154
1155                         goto out_teardown_dma_pools;
1156                 }
1157
1158                 ccb->epthru             = (mraid_epassthru_t *)
1159                                                 epthru_pci_blk[i].vaddr;
1160                 ccb->epthru_dma_h       = epthru_pci_blk[i].dma_addr;
1161                 ccb->pthru              = (mraid_passthru_t *)ccb->epthru;
1162                 ccb->pthru_dma_h        = ccb->epthru_dma_h;
1163
1164
1165                 ccb->sgl64              = (mbox_sgl64 *)sg_pci_blk[i].vaddr;
1166                 ccb->sgl_dma_h          = sg_pci_blk[i].dma_addr;
1167                 ccb->sgl32              = (mbox_sgl32 *)ccb->sgl64;
1168
1169                 scb->ccb                = (caddr_t)ccb;
1170                 scb->gp                 = 0;
1171
1172                 scb->sno                = i;    // command index
1173
1174                 scb->scp                = NULL;
1175                 scb->state              = SCB_FREE;
1176                 scb->dma_direction      = PCI_DMA_NONE;
1177                 scb->dma_type           = MRAID_DMA_NONE;
1178                 scb->dev_channel        = -1;
1179                 scb->dev_target         = -1;
1180
1181                 // put scb in the free pool
1182                 list_add_tail(&scb->list, &adapter->kscb_pool);
1183         }
1184
1185         return 0;
1186
1187 out_teardown_dma_pools:
1188         megaraid_mbox_teardown_dma_pools(adapter);
1189 out_free_scb_list:
1190         kfree(adapter->kscb_list);
1191 out_free_ibuf:
1192         pci_free_consistent(pdev, MBOX_IBUF_SIZE, (void *)adapter->ibuf,
1193                 adapter->ibuf_dma_h);
1194 out_free_common_mbox:
1195         pci_free_consistent(adapter->pdev, sizeof(mbox64_t),
1196                 (caddr_t)raid_dev->una_mbox64, raid_dev->una_mbox64_dma);
1197
1198         return -1;
1199 }
1200
1201
1202 /**
1203  * megaraid_free_cmd_packets - free memory
1204  * @param adapter       : soft state of the raid controller
1205  *
1206  * Release memory resources allocated for commands
1207  */
1208 static void
1209 megaraid_free_cmd_packets(adapter_t *adapter)
1210 {
1211         mraid_device_t *raid_dev = ADAP2RAIDDEV(adapter);
1212
1213         megaraid_mbox_teardown_dma_pools(adapter);
1214
1215         kfree(adapter->kscb_list);
1216
1217         pci_free_consistent(adapter->pdev, MBOX_IBUF_SIZE,
1218                 (void *)adapter->ibuf, adapter->ibuf_dma_h);
1219
1220         pci_free_consistent(adapter->pdev, sizeof(mbox64_t),
1221                 (caddr_t)raid_dev->una_mbox64, raid_dev->una_mbox64_dma);
1222         return;
1223 }
1224
1225
1226 /**
1227  * megaraid_mbox_setup_dma_pools - setup dma pool for command packets
1228  * @param adapter       : HBA soft state
1229  *
1230  * setup the dma pools for mailbox, passthru and extended passthru structures,
1231  * and scatter-gather lists
1232  */
1233 static int
1234 megaraid_mbox_setup_dma_pools(adapter_t *adapter)
1235 {
1236         mraid_device_t          *raid_dev = ADAP2RAIDDEV(adapter);
1237         struct mraid_pci_blk    *epthru_pci_blk;
1238         struct mraid_pci_blk    *sg_pci_blk;
1239         struct mraid_pci_blk    *mbox_pci_blk;
1240         int                     i;
1241
1242
1243
1244         // Allocate memory for 16-bytes aligned mailboxes
1245         raid_dev->mbox_pool_handle = pci_pool_create("megaraid mbox pool",
1246                                                 adapter->pdev,
1247                                                 sizeof(mbox64_t) + 16,
1248                                                 16, 0);
1249
1250         if (raid_dev->mbox_pool_handle == NULL) {
1251                 goto fail_setup_dma_pool;
1252         }
1253
1254         mbox_pci_blk = raid_dev->mbox_pool;
1255         for (i = 0; i < MBOX_MAX_SCSI_CMDS; i++) {
1256                 mbox_pci_blk[i].vaddr = pci_pool_alloc(
1257                                                 raid_dev->mbox_pool_handle,
1258                                                 GFP_KERNEL,
1259                                                 &mbox_pci_blk[i].dma_addr);
1260                 if (!mbox_pci_blk[i].vaddr) {
1261                         goto fail_setup_dma_pool;
1262                 }
1263         }
1264
1265         /*
1266          * Allocate memory for each embedded passthru strucuture pointer
1267          * Request for a 128 bytes aligned structure for each passthru command
1268          * structure
1269          * Since passthru and extended passthru commands are exclusive, they
1270          * share common memory pool. Passthru structures piggyback on memory
1271          * allocted to extended passthru since passthru is smaller of the two
1272          */
1273         raid_dev->epthru_pool_handle = pci_pool_create("megaraid mbox pthru",
1274                         adapter->pdev, sizeof(mraid_epassthru_t), 128, 0);
1275
1276         if (raid_dev->epthru_pool_handle == NULL) {
1277                 goto fail_setup_dma_pool;
1278         }
1279
1280         epthru_pci_blk = raid_dev->epthru_pool;
1281         for (i = 0; i < MBOX_MAX_SCSI_CMDS; i++) {
1282                 epthru_pci_blk[i].vaddr = pci_pool_alloc(
1283                                                 raid_dev->epthru_pool_handle,
1284                                                 GFP_KERNEL,
1285                                                 &epthru_pci_blk[i].dma_addr);
1286                 if (!epthru_pci_blk[i].vaddr) {
1287                         goto fail_setup_dma_pool;
1288                 }
1289         }
1290
1291
1292         // Allocate memory for each scatter-gather list. Request for 512 bytes
1293         // alignment for each sg list
1294         raid_dev->sg_pool_handle = pci_pool_create("megaraid mbox sg",
1295                                         adapter->pdev,
1296                                         sizeof(mbox_sgl64) * MBOX_MAX_SG_SIZE,
1297                                         512, 0);
1298
1299         if (raid_dev->sg_pool_handle == NULL) {
1300                 goto fail_setup_dma_pool;
1301         }
1302
1303         sg_pci_blk = raid_dev->sg_pool;
1304         for (i = 0; i < MBOX_MAX_SCSI_CMDS; i++) {
1305                 sg_pci_blk[i].vaddr = pci_pool_alloc(
1306                                                 raid_dev->sg_pool_handle,
1307                                                 GFP_KERNEL,
1308                                                 &sg_pci_blk[i].dma_addr);
1309                 if (!sg_pci_blk[i].vaddr) {
1310                         goto fail_setup_dma_pool;
1311                 }
1312         }
1313
1314         return 0;
1315
1316 fail_setup_dma_pool:
1317         megaraid_mbox_teardown_dma_pools(adapter);
1318         return -1;
1319 }
1320
1321
1322 /**
1323  * megaraid_mbox_teardown_dma_pools - teardown dma pools for command packets
1324  * @param adapter       : HBA soft state
1325  *
1326  * teardown the dma pool for mailbox, passthru and extended passthru
1327  * structures, and scatter-gather lists
1328  */
1329 static void
1330 megaraid_mbox_teardown_dma_pools(adapter_t *adapter)
1331 {
1332         mraid_device_t          *raid_dev = ADAP2RAIDDEV(adapter);
1333         struct mraid_pci_blk    *epthru_pci_blk;
1334         struct mraid_pci_blk    *sg_pci_blk;
1335         struct mraid_pci_blk    *mbox_pci_blk;
1336         int                     i;
1337
1338
1339         sg_pci_blk = raid_dev->sg_pool;
1340         for (i = 0; i < MBOX_MAX_SCSI_CMDS && sg_pci_blk[i].vaddr; i++) {
1341                 pci_pool_free(raid_dev->sg_pool_handle, sg_pci_blk[i].vaddr,
1342                         sg_pci_blk[i].dma_addr);
1343         }
1344         if (raid_dev->sg_pool_handle)
1345                 pci_pool_destroy(raid_dev->sg_pool_handle);
1346
1347
1348         epthru_pci_blk = raid_dev->epthru_pool;
1349         for (i = 0; i < MBOX_MAX_SCSI_CMDS && epthru_pci_blk[i].vaddr; i++) {
1350                 pci_pool_free(raid_dev->epthru_pool_handle,
1351                         epthru_pci_blk[i].vaddr, epthru_pci_blk[i].dma_addr);
1352         }
1353         if (raid_dev->epthru_pool_handle)
1354                 pci_pool_destroy(raid_dev->epthru_pool_handle);
1355
1356
1357         mbox_pci_blk = raid_dev->mbox_pool;
1358         for (i = 0; i < MBOX_MAX_SCSI_CMDS && mbox_pci_blk[i].vaddr; i++) {
1359                 pci_pool_free(raid_dev->mbox_pool_handle,
1360                         mbox_pci_blk[i].vaddr, mbox_pci_blk[i].dma_addr);
1361         }
1362         if (raid_dev->mbox_pool_handle)
1363                 pci_pool_destroy(raid_dev->mbox_pool_handle);
1364
1365         return;
1366 }
1367
1368
1369 /**
1370  * megaraid_alloc_scb - detach and return a scb from the free list
1371  * @adapter     : controller's soft state
1372  *
1373  * return the scb from the head of the free list. NULL if there are none
1374  * available
1375  **/
1376 static inline scb_t *
1377 megaraid_alloc_scb(adapter_t *adapter, struct scsi_cmnd *scp)
1378 {
1379         struct list_head        *head = &adapter->kscb_pool;
1380         scb_t                   *scb = NULL;
1381         unsigned long           flags;
1382
1383         // detach scb from free pool
1384         spin_lock_irqsave(SCSI_FREE_LIST_LOCK(adapter), flags);
1385
1386         if (list_empty(head)) {
1387                 spin_unlock_irqrestore(SCSI_FREE_LIST_LOCK(adapter), flags);
1388                 return NULL;
1389         }
1390
1391         scb = list_entry(head->next, scb_t, list);
1392         list_del_init(&scb->list);
1393
1394         spin_unlock_irqrestore(SCSI_FREE_LIST_LOCK(adapter), flags);
1395
1396         scb->state      = SCB_ACTIVE;
1397         scb->scp        = scp;
1398         scb->dma_type   = MRAID_DMA_NONE;
1399
1400         return scb;
1401 }
1402
1403
1404 /**
1405  * megaraid_dealloc_scb - return the scb to the free pool
1406  * @adapter     : controller's soft state
1407  * @scb         : scb to be freed
1408  *
1409  * return the scb back to the free list of scbs. The caller must 'flush' the
1410  * SCB before calling us. E.g., performing pci_unamp and/or pci_sync etc.
1411  * NOTE NOTE: Make sure the scb is not on any list before calling this
1412  * routine.
1413  **/
1414 static inline void
1415 megaraid_dealloc_scb(adapter_t *adapter, scb_t *scb)
1416 {
1417         unsigned long           flags;
1418
1419         // put scb in the free pool
1420         scb->state      = SCB_FREE;
1421         scb->scp        = NULL;
1422         spin_lock_irqsave(SCSI_FREE_LIST_LOCK(adapter), flags);
1423
1424         list_add(&scb->list, &adapter->kscb_pool);
1425
1426         spin_unlock_irqrestore(SCSI_FREE_LIST_LOCK(adapter), flags);
1427
1428         return;
1429 }
1430
1431
1432 /**
1433  * megaraid_mbox_mksgl - make the scatter-gather list
1434  * @adapter     - controller's soft state
1435  * @scb         - scsi control block
1436  *
1437  * prepare the scatter-gather list
1438  */
1439 static inline int
1440 megaraid_mbox_mksgl(adapter_t *adapter, scb_t *scb)
1441 {
1442         struct scatterlist      *sgl;
1443         mbox_ccb_t              *ccb;
1444         struct page             *page;
1445         unsigned long           offset;
1446         struct scsi_cmnd        *scp;
1447         int                     sgcnt;
1448         int                     i;
1449
1450
1451         scp     = scb->scp;
1452         ccb     = (mbox_ccb_t *)scb->ccb;
1453
1454         // no mapping required if no data to be transferred
1455         if (!scp->request_buffer || !scp->request_bufflen)
1456                 return 0;
1457
1458         if (!scp->use_sg) {     /* scatter-gather list not used */
1459
1460                 page = virt_to_page(scp->request_buffer);
1461
1462                 offset = ((unsigned long)scp->request_buffer & ~PAGE_MASK);
1463
1464                 ccb->buf_dma_h = pci_map_page(adapter->pdev, page, offset,
1465                                                   scp->request_bufflen,
1466                                                   scb->dma_direction);
1467                 scb->dma_type = MRAID_DMA_WBUF;
1468
1469                 /*
1470                  * We need to handle special 64-bit commands that need a
1471                  * minimum of 1 SG
1472                  */
1473                 sgcnt = 1;
1474                 ccb->sgl64[0].address   = ccb->buf_dma_h;
1475                 ccb->sgl64[0].length    = scp->request_bufflen;
1476
1477                 return sgcnt;
1478         }
1479
1480         sgl = (struct scatterlist *)scp->request_buffer;
1481
1482         // The number of sg elements returned must not exceed our limit
1483         sgcnt = pci_map_sg(adapter->pdev, sgl, scp->use_sg,
1484                         scb->dma_direction);
1485
1486         if (sgcnt > adapter->sglen) {
1487                 con_log(CL_ANN, (KERN_CRIT
1488                         "megaraid critical: too many sg elements:%d\n",
1489                         sgcnt));
1490                 BUG();
1491         }
1492
1493         scb->dma_type = MRAID_DMA_WSG;
1494
1495         for (i = 0; i < sgcnt; i++, sgl++) {
1496                 ccb->sgl64[i].address   = sg_dma_address(sgl);
1497                 ccb->sgl64[i].length    = sg_dma_len(sgl);
1498         }
1499
1500         // Return count of SG nodes
1501         return sgcnt;
1502 }
1503
1504
1505 /**
1506  * mbox_post_cmd - issue a mailbox command
1507  * @adapter     - controller's soft state
1508  * @scb         - command to be issued
1509  *
1510  * post the command to the controller if mailbox is availble.
1511  */
1512 static inline int
1513 mbox_post_cmd(adapter_t *adapter, scb_t *scb)
1514 {
1515         mraid_device_t  *raid_dev = ADAP2RAIDDEV(adapter);
1516         mbox64_t        *mbox64;
1517         mbox_t          *mbox;
1518         mbox_ccb_t      *ccb;
1519         unsigned long   flags;
1520         unsigned int    i = 0;
1521
1522
1523         ccb     = (mbox_ccb_t *)scb->ccb;
1524         mbox    = raid_dev->mbox;
1525         mbox64  = raid_dev->mbox64;
1526
1527         /*
1528          * Check for busy mailbox. If it is, return failure - the caller
1529          * should retry later.
1530          */
1531         spin_lock_irqsave(MAILBOX_LOCK(raid_dev), flags);
1532
1533         if (unlikely(mbox->busy)) {
1534                 do {
1535                         udelay(1);
1536                         i++;
1537                         rmb();
1538                 } while(mbox->busy && (i < max_mbox_busy_wait));
1539
1540                 if (mbox->busy) {
1541
1542                         spin_unlock_irqrestore(MAILBOX_LOCK(raid_dev), flags);
1543
1544                         return -1;
1545                 }
1546         }
1547
1548
1549         // Copy this command's mailbox data into "adapter's" mailbox
1550         memcpy((caddr_t)mbox64, (caddr_t)ccb->mbox64, 22);
1551         mbox->cmdid = scb->sno;
1552
1553         adapter->outstanding_cmds++;
1554
1555         if (scb->dma_direction == PCI_DMA_TODEVICE) {
1556                 if (!scb->scp->use_sg) {        // sg list not used
1557                         pci_dma_sync_single(adapter->pdev, ccb->buf_dma_h,
1558                                         scb->scp->request_bufflen,
1559                                         PCI_DMA_TODEVICE);
1560                 }
1561                 else {
1562                         pci_dma_sync_sg(adapter->pdev, scb->scp->request_buffer,
1563                                 scb->scp->use_sg, PCI_DMA_TODEVICE);
1564                 }
1565         }
1566
1567         mbox->busy      = 1;    // Set busy
1568         mbox->poll      = 0;
1569         mbox->ack       = 0;
1570         wmb();
1571
1572         WRINDOOR(raid_dev, raid_dev->mbox_dma | 0x1);
1573
1574         spin_unlock_irqrestore(MAILBOX_LOCK(raid_dev), flags);
1575
1576         return 0;
1577 }
1578
1579
1580 /**
1581  * megaraid_queue_command - generic queue entry point for all LLDs
1582  * @scp         : pointer to the scsi command to be executed
1583  * @done        : callback routine to be called after the cmd has be completed
1584  *
1585  * Queue entry point for mailbox based controllers.
1586  */
1587 static int
1588 megaraid_queue_command(struct scsi_cmnd *scp, void (* done)(struct scsi_cmnd *))
1589 {
1590         adapter_t       *adapter;
1591         scb_t           *scb;
1592         int             if_busy;
1593
1594         adapter         = SCP2ADAPTER(scp);
1595         scp->scsi_done  = done;
1596         scp->result     = 0;
1597
1598         ASSERT(spin_is_locked(adapter->host_lock));
1599
1600         spin_unlock(adapter->host_lock);
1601
1602         /*
1603          * Allocate and build a SCB request
1604          * if_busy flag will be set if megaraid_mbox_build_cmd() command could
1605          * not allocate scb. We will return non-zero status in that case.
1606          * NOTE: scb can be null even though certain commands completed
1607          * successfully, e.g., MODE_SENSE and TEST_UNIT_READY, it would
1608          * return 0 in that case, and we would do the callback right away.
1609          */
1610         if_busy = 0;
1611         scb     = megaraid_mbox_build_cmd(adapter, scp, &if_busy);
1612
1613         if (scb) {
1614                 megaraid_mbox_runpendq(adapter, scb);
1615         }
1616
1617         spin_lock(adapter->host_lock);
1618
1619         if (!scb) {     // command already completed
1620                 done(scp);
1621         }
1622
1623         return if_busy;
1624 }
1625
1626
1627 /**
1628  * megaraid_mbox_build_cmd - transform the mid-layer scsi command to megaraid
1629  * firmware lingua
1630  * @adapter     - controller's soft state
1631  * @scp         - mid-layer scsi command pointer
1632  * @busy        - set if request could not be completed because of lack of
1633  *              resources
1634  *
1635  * convert the command issued by mid-layer to format understood by megaraid
1636  * firmware. We also complete certain command without sending them to firmware
1637  */
1638 static scb_t *
1639 megaraid_mbox_build_cmd(adapter_t *adapter, struct scsi_cmnd *scp, int *busy)
1640 {
1641         mraid_device_t          *rdev = ADAP2RAIDDEV(adapter);
1642         int                     channel;
1643         int                     target;
1644         int                     islogical;
1645         mbox_ccb_t              *ccb;
1646         mraid_passthru_t        *pthru;
1647         mbox64_t                *mbox64;
1648         mbox_t                  *mbox;
1649         scb_t                   *scb;
1650         char                    skip[] = "skipping";
1651         char                    scan[] = "scanning";
1652         char                    *ss;
1653
1654
1655         /*
1656          * Get the appropriate device map for the device this command is
1657          * intended for
1658          */
1659         MRAID_GET_DEVICE_MAP(adapter, scp, channel, target, islogical);
1660
1661         /*
1662          * Logical drive commands
1663          */
1664         if (islogical) {
1665                 switch (scp->cmnd[0]) {
1666                 case TEST_UNIT_READY:
1667                         /*
1668                          * Do we support clustering and is the support enabled
1669                          * If no, return success always
1670                          */
1671                         if (!adapter->ha) {
1672                                 scp->result = (DID_OK << 16);
1673                                 return NULL;
1674                         }
1675
1676                         if (!(scb = megaraid_alloc_scb(adapter, scp))) {
1677                                 scp->result = (DID_ERROR << 16);
1678                                 *busy = 1;
1679                                 return NULL;
1680                         }
1681
1682                         scb->dma_direction      = scp->sc_data_direction;
1683                         scb->dev_channel        = 0xFF;
1684                         scb->dev_target         = target;
1685                         ccb                     = (mbox_ccb_t *)scb->ccb;
1686
1687                         /*
1688                          * The command id will be provided by the command
1689                          * issuance routine
1690                          */
1691                         ccb->raw_mbox[0]        = CLUSTER_CMD;
1692                         ccb->raw_mbox[2]        = RESERVATION_STATUS;
1693                         ccb->raw_mbox[3]        = target;
1694
1695                         return scb;
1696
1697                 case MODE_SENSE:
1698                         if (scp->use_sg) {
1699                                 struct scatterlist      *sgl;
1700                                 caddr_t                 vaddr;
1701
1702                                 sgl = (struct scatterlist *)scp->request_buffer;
1703                                 if (sgl->page) {
1704                                         vaddr = (caddr_t)
1705                                                 (page_address((&sgl[0])->page)
1706                                                 + (&sgl[0])->offset);
1707
1708                                         memset(vaddr, 0, scp->cmnd[4]);
1709                                 }
1710                                 else {
1711                                         con_log(CL_ANN, (KERN_WARNING
1712                                         "megaraid mailbox: invalid sg:%d\n",
1713                                         __LINE__));
1714                                 }
1715                         }
1716                         else {
1717                                 memset(scp->request_buffer, 0, scp->cmnd[4]);
1718                         }
1719                         scp->result = (DID_OK << 16);
1720                         return NULL;
1721
1722                 case INQUIRY:
1723                         /*
1724                          * Display the channel scan for logical drives
1725                          * Do not display scan for a channel if already done.
1726                          */
1727                         if (!(rdev->last_disp & (1L << SCP2CHANNEL(scp)))) {
1728
1729                                 con_log(CL_ANN, (KERN_INFO
1730                                         "scsi[%d]: scanning scsi channel %d",
1731                                         adapter->host->host_no,
1732                                         SCP2CHANNEL(scp)));
1733
1734                                 con_log(CL_ANN, (
1735                                         " [virtual] for logical drives\n"));
1736
1737                                 rdev->last_disp |= (1L << SCP2CHANNEL(scp));
1738                         }
1739
1740                         /* Fall through */
1741
1742                 case READ_CAPACITY:
1743                         /*
1744                          * Do not allow LUN > 0 for logical drives and
1745                          * requests for more than 40 logical drives
1746                          */
1747                         if (SCP2LUN(scp)) {
1748                                 scp->result = (DID_BAD_TARGET << 16);
1749                                 return NULL;
1750                         }
1751                         if ((target % 0x80) >= MAX_LOGICAL_DRIVES_40LD) {
1752                                 scp->result = (DID_BAD_TARGET << 16);
1753                                 return NULL;
1754                         }
1755
1756
1757                         /* Allocate a SCB and initialize passthru */
1758                         if (!(scb = megaraid_alloc_scb(adapter, scp))) {
1759                                 scp->result = (DID_ERROR << 16);
1760                                 *busy = 1;
1761                                 return NULL;
1762                         }
1763
1764                         ccb                     = (mbox_ccb_t *)scb->ccb;
1765                         scb->dev_channel        = 0xFF;
1766                         scb->dev_target         = target;
1767                         pthru                   = ccb->pthru;
1768                         mbox                    = ccb->mbox;
1769                         mbox64                  = ccb->mbox64;
1770
1771                         pthru->timeout          = 0;
1772                         pthru->ars              = 1;
1773                         pthru->reqsenselen      = 14;
1774                         pthru->islogical        = 1;
1775                         pthru->logdrv           = target;
1776                         pthru->cdblen           = scp->cmd_len;
1777                         memcpy(pthru->cdb, scp->cmnd, scp->cmd_len);
1778
1779                         mbox->cmd               = MBOXCMD_PASSTHRU64;
1780                         scb->dma_direction      = scp->sc_data_direction;
1781
1782                         pthru->dataxferlen      = scp->request_bufflen;
1783                         pthru->dataxferaddr     = ccb->sgl_dma_h;
1784                         pthru->numsge           = megaraid_mbox_mksgl(adapter,
1785                                                         scb);
1786
1787                         mbox->xferaddr          = 0xFFFFFFFF;
1788                         mbox64->xferaddr_lo     = (uint32_t )ccb->pthru_dma_h;
1789                         mbox64->xferaddr_hi     = 0;
1790
1791                         return scb;
1792
1793                 case READ_6:
1794                 case WRITE_6:
1795                 case READ_10:
1796                 case WRITE_10:
1797                 case READ_12:
1798                 case WRITE_12:
1799
1800                         /*
1801                          * Allocate a SCB and initialize mailbox
1802                          */
1803                         if (!(scb = megaraid_alloc_scb(adapter, scp))) {
1804                                 scp->result = (DID_ERROR << 16);
1805                                 *busy = 1;
1806                                 return NULL;
1807                         }
1808                         ccb                     = (mbox_ccb_t *)scb->ccb;
1809                         scb->dev_channel        = 0xFF;
1810                         scb->dev_target         = target;
1811                         mbox                    = ccb->mbox;
1812                         mbox64                  = ccb->mbox64;
1813                         mbox->logdrv            = target;
1814
1815                         /*
1816                          * A little HACK: 2nd bit is zero for all scsi read
1817                          * commands and is set for all scsi write commands
1818                          */
1819                         mbox->cmd = (scp->cmnd[0] & 0x02) ?  MBOXCMD_LWRITE64:
1820                                         MBOXCMD_LREAD64 ;
1821
1822                         /*
1823                          * 6-byte READ(0x08) or WRITE(0x0A) cdb
1824                          */
1825                         if (scp->cmd_len == 6) {
1826                                 mbox->numsectors = (uint32_t)scp->cmnd[4];
1827                                 mbox->lba =
1828                                         ((uint32_t)scp->cmnd[1] << 16)  |
1829                                         ((uint32_t)scp->cmnd[2] << 8)   |
1830                                         (uint32_t)scp->cmnd[3];
1831
1832                                 mbox->lba &= 0x1FFFFF;
1833                         }
1834
1835                         /*
1836                          * 10-byte READ(0x28) or WRITE(0x2A) cdb
1837                          */
1838                         else if (scp->cmd_len == 10) {
1839                                 mbox->numsectors =
1840                                         (uint32_t)scp->cmnd[8] |
1841                                         ((uint32_t)scp->cmnd[7] << 8);
1842                                 mbox->lba =
1843                                         ((uint32_t)scp->cmnd[2] << 24) |
1844                                         ((uint32_t)scp->cmnd[3] << 16) |
1845                                         ((uint32_t)scp->cmnd[4] << 8) |
1846                                         (uint32_t)scp->cmnd[5];
1847                         }
1848
1849                         /*
1850                          * 12-byte READ(0xA8) or WRITE(0xAA) cdb
1851                          */
1852                         else if (scp->cmd_len == 12) {
1853                                 mbox->lba =
1854                                         ((uint32_t)scp->cmnd[2] << 24) |
1855                                         ((uint32_t)scp->cmnd[3] << 16) |
1856                                         ((uint32_t)scp->cmnd[4] << 8) |
1857                                         (uint32_t)scp->cmnd[5];
1858
1859                                 mbox->numsectors =
1860                                         ((uint32_t)scp->cmnd[6] << 24) |
1861                                         ((uint32_t)scp->cmnd[7] << 16) |
1862                                         ((uint32_t)scp->cmnd[8] << 8) |
1863                                         (uint32_t)scp->cmnd[9];
1864                         }
1865                         else {
1866                                 con_log(CL_ANN, (KERN_WARNING
1867                                         "megaraid: unsupported CDB length\n"));
1868
1869                                 megaraid_dealloc_scb(adapter, scb);
1870
1871                                 scp->result = (DID_ERROR << 16);
1872                                 return NULL;
1873                         }
1874
1875                         scb->dma_direction = scp->sc_data_direction;
1876
1877                         // Calculate Scatter-Gather info
1878                         mbox64->xferaddr_lo     = (uint32_t )ccb->sgl_dma_h;
1879                         mbox->numsge            = megaraid_mbox_mksgl(adapter,
1880                                                         scb);
1881                         mbox->xferaddr          = 0xFFFFFFFF;
1882                         mbox64->xferaddr_hi     = 0;
1883
1884                         return scb;
1885
1886                 case RESERVE:
1887                 case RELEASE:
1888                         /*
1889                          * Do we support clustering and is the support enabled
1890                          */
1891                         if (!adapter->ha) {
1892                                 scp->result = (DID_BAD_TARGET << 16);
1893                                 return NULL;
1894                         }
1895
1896                         /*
1897                          * Allocate a SCB and initialize mailbox
1898                          */
1899                         if (!(scb = megaraid_alloc_scb(adapter, scp))) {
1900                                 scp->result = (DID_ERROR << 16);
1901                                 *busy = 1;
1902                                 return NULL;
1903                         }
1904
1905                         ccb                     = (mbox_ccb_t *)scb->ccb;
1906                         scb->dev_channel        = 0xFF;
1907                         scb->dev_target         = target;
1908                         ccb->raw_mbox[0]        = CLUSTER_CMD;
1909                         ccb->raw_mbox[2]        =  (scp->cmnd[0] == RESERVE) ?
1910                                                 RESERVE_LD : RELEASE_LD;
1911
1912                         ccb->raw_mbox[3]        = target;
1913                         scb->dma_direction      = scp->sc_data_direction;
1914
1915                         return scb;
1916
1917                 default:
1918                         scp->result = (DID_BAD_TARGET << 16);
1919                         return NULL;
1920                 }
1921         }
1922         else { // Passthru device commands
1923
1924                 // Do not allow access to target id > 15 or LUN > 7
1925                 if (target > 15 || SCP2LUN(scp) > 7) {
1926                         scp->result = (DID_BAD_TARGET << 16);
1927                         return NULL;
1928                 }
1929
1930                 // if fast load option was set and scan for last device is
1931                 // over, reset the fast_load flag so that during a possible
1932                 // next scan, devices can be made available
1933                 if (rdev->fast_load && (target == 15) &&
1934                         (SCP2CHANNEL(scp) == adapter->max_channel -1)) {
1935
1936                         con_log(CL_ANN, (KERN_INFO
1937                         "megaraid[%d]: physical device scan re-enabled\n",
1938                                 adapter->host->host_no));
1939                         rdev->fast_load = 0;
1940                 }
1941
1942                 /*
1943                  * Display the channel scan for physical devices
1944                  */
1945                 if (!(rdev->last_disp & (1L << SCP2CHANNEL(scp)))) {
1946
1947                         ss = rdev->fast_load ? skip : scan;
1948
1949                         con_log(CL_ANN, (KERN_INFO
1950                                 "scsi[%d]: %s scsi channel %d [Phy %d]",
1951                                 adapter->host->host_no, ss, SCP2CHANNEL(scp),
1952                                 channel));
1953
1954                         con_log(CL_ANN, (
1955                                 " for non-raid devices\n"));
1956
1957                         rdev->last_disp |= (1L << SCP2CHANNEL(scp));
1958                 }
1959
1960                 // disable channel sweep if fast load option given
1961                 if (rdev->fast_load) {
1962                         scp->result = (DID_BAD_TARGET << 16);
1963                         return NULL;
1964                 }
1965
1966                 // Allocate a SCB and initialize passthru
1967                 if (!(scb = megaraid_alloc_scb(adapter, scp))) {
1968                         scp->result = (DID_ERROR << 16);
1969                         *busy = 1;
1970                         return NULL;
1971                 }
1972
1973                 ccb                     = (mbox_ccb_t *)scb->ccb;
1974                 scb->dev_channel        = channel;
1975                 scb->dev_target         = target;
1976                 scb->dma_direction      = scp->sc_data_direction;
1977                 mbox                    = ccb->mbox;
1978                 mbox64                  = ccb->mbox64;
1979
1980                 // Does this firmware support extended CDBs
1981                 if (adapter->max_cdb_sz == 16) {
1982                         mbox->cmd               = MBOXCMD_EXTPTHRU;
1983
1984                         megaraid_mbox_prepare_epthru(adapter, scb, scp);
1985
1986                         mbox64->xferaddr_lo     = (uint32_t)ccb->epthru_dma_h;
1987                         mbox64->xferaddr_hi     = 0;
1988                         mbox->xferaddr          = 0xFFFFFFFF;
1989                 }
1990                 else {
1991                         mbox->cmd = MBOXCMD_PASSTHRU64;
1992
1993                         megaraid_mbox_prepare_pthru(adapter, scb, scp);
1994
1995                         mbox64->xferaddr_lo     = (uint32_t)ccb->pthru_dma_h;
1996                         mbox64->xferaddr_hi     = 0;
1997                         mbox->xferaddr          = 0xFFFFFFFF;
1998                 }
1999                 return scb;
2000         }
2001
2002         // NOT REACHED
2003 }
2004
2005
2006 /**
2007  * megaraid_mbox_runpendq - execute commands queued in the pending queue
2008  * @adapter     : controller's soft state
2009  * @scb         : SCB to be queued in the pending list
2010  *
2011  * scan the pending list for commands which are not yet issued and try to
2012  * post to the controller. The SCB can be a null pointer, which would indicate
2013  * no SCB to be queue, just try to execute the ones in the pending list.
2014  *
2015  * NOTE: We do not actually traverse the pending list. The SCBs are plucked
2016  * out from the head of the pending list. If it is successfully issued, the
2017  * next SCB is at the head now.
2018  */
2019 static void
2020 megaraid_mbox_runpendq(adapter_t *adapter, scb_t *scb_q)
2021 {
2022         scb_t                   *scb;
2023         unsigned long           flags;
2024
2025         spin_lock_irqsave(PENDING_LIST_LOCK(adapter), flags);
2026
2027         if (scb_q) {
2028                 scb_q->state = SCB_PENDQ;
2029                 list_add_tail(&scb_q->list, &adapter->pend_list);
2030         }
2031
2032         // if the adapter in not in quiescent mode, post the commands to FW
2033         if (adapter->quiescent) {
2034                 spin_unlock_irqrestore(PENDING_LIST_LOCK(adapter), flags);
2035                 return;
2036         }
2037
2038         while (!list_empty(&adapter->pend_list)) {
2039
2040                 ASSERT(spin_is_locked(PENDING_LIST_LOCK(adapter)));
2041
2042                 scb = list_entry(adapter->pend_list.next, scb_t, list);
2043
2044                 // remove the scb from the pending list and try to
2045                 // issue. If we are unable to issue it, put back in
2046                 // the pending list and return
2047
2048                 list_del_init(&scb->list);
2049
2050                 spin_unlock_irqrestore(PENDING_LIST_LOCK(adapter), flags);
2051
2052                 // if mailbox was busy, return SCB back to pending
2053                 // list. Make sure to add at the head, since that's
2054                 // where it would have been removed from
2055
2056                 scb->state = SCB_ISSUED;
2057
2058                 if (mbox_post_cmd(adapter, scb) != 0) {
2059
2060                         spin_lock_irqsave(PENDING_LIST_LOCK(adapter), flags);
2061
2062                         scb->state = SCB_PENDQ;
2063
2064                         list_add(&scb->list, &adapter->pend_list);
2065
2066                         spin_unlock_irqrestore(PENDING_LIST_LOCK(adapter),
2067                                 flags);
2068
2069                         return;
2070                 }
2071
2072                 spin_lock_irqsave(PENDING_LIST_LOCK(adapter), flags);
2073         }
2074
2075         spin_unlock_irqrestore(PENDING_LIST_LOCK(adapter), flags);
2076
2077
2078         return;
2079 }
2080
2081
2082 /**
2083  * megaraid_mbox_prepare_pthru - prepare a command for physical devices
2084  * @adapter     - pointer to controller's soft state
2085  * @scb         - scsi control block
2086  * @scp         - scsi command from the mid-layer
2087  *
2088  * prepare a command for the scsi physical devices
2089  */
2090 static void
2091 megaraid_mbox_prepare_pthru(adapter_t *adapter, scb_t *scb,
2092                 struct scsi_cmnd *scp)
2093 {
2094         mbox_ccb_t              *ccb;
2095         mraid_passthru_t        *pthru;
2096         uint8_t                 channel;
2097         uint8_t                 target;
2098
2099         ccb     = (mbox_ccb_t *)scb->ccb;
2100         pthru   = ccb->pthru;
2101         channel = scb->dev_channel;
2102         target  = scb->dev_target;
2103
2104         pthru->timeout          = 1;    // 0=6sec, 1=60sec, 2=10min, 3=3hrs
2105         pthru->ars              = 1;
2106         pthru->islogical        = 0;
2107         pthru->channel          = 0;
2108         pthru->target           = (channel << 4) | target;
2109         pthru->logdrv           = SCP2LUN(scp);
2110         pthru->reqsenselen      = 14;
2111         pthru->cdblen           = scp->cmd_len;
2112
2113         memcpy(pthru->cdb, scp->cmnd, scp->cmd_len);
2114
2115         if (scp->request_bufflen) {
2116                 pthru->dataxferlen      = scp->request_bufflen;
2117                 pthru->dataxferaddr     = ccb->sgl_dma_h;
2118                 pthru->numsge           = megaraid_mbox_mksgl(adapter, scb);
2119         }
2120         else {
2121                 pthru->dataxferaddr     = 0;
2122                 pthru->dataxferlen      = 0;
2123                 pthru->numsge           = 0;
2124         }
2125         return;
2126 }
2127
2128
2129 /**
2130  * megaraid_mbox_prepare_epthru - prepare a command for physical devices
2131  * @adapter     - pointer to controller's soft state
2132  * @scb         - scsi control block
2133  * @scp         - scsi command from the mid-layer
2134  *
2135  * prepare a command for the scsi physical devices. This rountine prepares
2136  * commands for devices which can take extended CDBs (>10 bytes)
2137  */
2138 static void
2139 megaraid_mbox_prepare_epthru(adapter_t *adapter, scb_t *scb,
2140                 struct scsi_cmnd *scp)
2141 {
2142         mbox_ccb_t              *ccb;
2143         mraid_epassthru_t       *epthru;
2144         uint8_t                 channel;
2145         uint8_t                 target;
2146
2147         ccb     = (mbox_ccb_t *)scb->ccb;
2148         epthru  = ccb->epthru;
2149         channel = scb->dev_channel;
2150         target  = scb->dev_target;
2151
2152         epthru->timeout         = 1;    // 0=6sec, 1=60sec, 2=10min, 3=3hrs
2153         epthru->ars             = 1;
2154         epthru->islogical       = 0;
2155         epthru->channel         = 0;
2156         epthru->target          = (channel << 4) | target;
2157         epthru->logdrv          = SCP2LUN(scp);
2158         epthru->reqsenselen     = 14;
2159         epthru->cdblen          = scp->cmd_len;
2160
2161         memcpy(epthru->cdb, scp->cmnd, scp->cmd_len);
2162
2163         if (scp->request_bufflen) {
2164                 epthru->dataxferlen     = scp->request_bufflen;
2165                 epthru->dataxferaddr    = ccb->sgl_dma_h;
2166                 epthru->numsge          = megaraid_mbox_mksgl(adapter, scb);
2167         }
2168         else {
2169                 epthru->dataxferaddr    = 0;
2170                 epthru->dataxferlen     = 0;
2171                 epthru->numsge          = 0;
2172         }
2173         return;
2174 }
2175
2176
2177 /**
2178  * megaraid_ack_sequence - interrupt ack sequence for memory mapped HBAs
2179  * @adapter     - controller's soft state
2180  *
2181  * Interrupt ackrowledgement sequence for memory mapped HBAs. Find out the
2182  * completed command and put them on the completed list for later processing.
2183  *
2184  * Returns:     1 if the interrupt is valid, 0 otherwise
2185  */
2186 static inline int
2187 megaraid_ack_sequence(adapter_t *adapter)
2188 {
2189         mraid_device_t          *raid_dev = ADAP2RAIDDEV(adapter);
2190         mbox_t                  *mbox;
2191         scb_t                   *scb;
2192         uint8_t                 nstatus;
2193         uint8_t                 completed[MBOX_MAX_FIRMWARE_STATUS];
2194         struct list_head        clist;
2195         int                     handled;
2196         uint32_t                dword;
2197         unsigned long           flags;
2198         int                     i, j;
2199
2200
2201         mbox    = raid_dev->mbox;
2202
2203         // move the SCBs from the firmware completed array to our local list
2204         INIT_LIST_HEAD(&clist);
2205
2206         // loop till F/W has more commands for us to complete
2207         handled = 0;
2208         spin_lock_irqsave(MAILBOX_LOCK(raid_dev), flags);
2209         do {
2210                 /*
2211                  * Check if a valid interrupt is pending. If found, force the
2212                  * interrupt line low.
2213                  */
2214                 dword = RDOUTDOOR(raid_dev);
2215                 if (dword != 0x10001234) break;
2216
2217                 handled = 1;
2218
2219                 WROUTDOOR(raid_dev, 0x10001234);
2220
2221                 nstatus = 0;
2222                 // wait for valid numstatus to post
2223                 for (i = 0; i < 0xFFFFF; i++) {
2224                         if (mbox->numstatus != 0xFF) {
2225                                 nstatus = mbox->numstatus;
2226                                 break;
2227                         }
2228                         rmb();
2229                 }
2230                 mbox->numstatus = 0xFF;
2231
2232                 adapter->outstanding_cmds -= nstatus;
2233
2234                 for (i = 0; i < nstatus; i++) {
2235
2236                         // wait for valid command index to post
2237                         for (j = 0; j < 0xFFFFF; j++) {
2238                                 if (mbox->completed[i] != 0xFF) break;
2239                                 rmb();
2240                         }
2241                         completed[i]            = mbox->completed[i];
2242                         mbox->completed[i]      = 0xFF;
2243
2244                         if (completed[i] == 0xFF) {
2245                                 con_log(CL_ANN, (KERN_CRIT
2246                                 "megaraid: command posting timed out\n"));
2247
2248                                 BUG();
2249                                 continue;
2250                         }
2251
2252                         // Get SCB associated with this command id
2253                         if (completed[i] >= MBOX_MAX_SCSI_CMDS) {
2254                                 // a cmm command
2255                                 scb = adapter->uscb_list + (completed[i] -
2256                                                 MBOX_MAX_SCSI_CMDS);
2257                         }
2258                         else {
2259                                 // an os command
2260                                 scb = adapter->kscb_list + completed[i];
2261                         }
2262
2263                         scb->status = mbox->status;
2264                         list_add_tail(&scb->list, &clist);
2265                 }
2266
2267                 // Acknowledge interrupt
2268                 WRINDOOR(raid_dev, 0x02);
2269
2270         } while(1);
2271
2272         spin_unlock_irqrestore(MAILBOX_LOCK(raid_dev), flags);
2273
2274
2275         // put the completed commands in the completed list. DPC would
2276         // complete these commands later
2277         spin_lock_irqsave(COMPLETED_LIST_LOCK(adapter), flags);
2278
2279         list_splice(&clist, &adapter->completed_list);
2280
2281         spin_unlock_irqrestore(COMPLETED_LIST_LOCK(adapter), flags);
2282
2283
2284         // schedule the DPC if there is some work for it
2285         if (handled)
2286                 tasklet_schedule(&adapter->dpc_h);
2287
2288         return handled;
2289 }
2290
2291
2292 /**
2293  * megaraid_isr - isr for memory based mailbox based controllers
2294  * @irq         - irq
2295  * @devp        - pointer to our soft state
2296  * @regs        - unused
2297  *
2298  * Interrupt service routine for memory-mapped mailbox controllers.
2299  */
2300 static irqreturn_t
2301 megaraid_isr(int irq, void *devp, struct pt_regs *regs)
2302 {
2303         adapter_t       *adapter = devp;
2304         int             handled;
2305
2306         handled = megaraid_ack_sequence(adapter);
2307
2308         /* Loop through any pending requests */
2309         if (!adapter->quiescent) {
2310                 megaraid_mbox_runpendq(adapter, NULL);
2311         }
2312
2313         return IRQ_RETVAL(handled);
2314 }
2315
2316
2317 /**
2318  * megaraid_mbox_sync_scb - sync kernel buffers
2319  * @adapter     : controller's soft state
2320  * @scb         : pointer to the resource packet
2321  *
2322  * DMA sync if required.
2323  */
2324 static inline void
2325 megaraid_mbox_sync_scb(adapter_t *adapter, scb_t *scb)
2326 {
2327         mbox_ccb_t      *ccb;
2328
2329         ccb     = (mbox_ccb_t *)scb->ccb;
2330
2331         switch (scb->dma_type) {
2332
2333         case MRAID_DMA_WBUF:
2334                 if (scb->dma_direction == PCI_DMA_FROMDEVICE) {
2335                         pci_dma_sync_single(adapter->pdev,
2336                                         ccb->buf_dma_h,
2337                                         scb->scp->request_bufflen,
2338                                         PCI_DMA_FROMDEVICE);
2339                 }
2340
2341                 pci_unmap_page(adapter->pdev, ccb->buf_dma_h,
2342                         scb->scp->request_bufflen, scb->dma_direction);
2343
2344                 break;
2345
2346         case MRAID_DMA_WSG:
2347                 if (scb->dma_direction == PCI_DMA_FROMDEVICE) {
2348                         pci_dma_sync_sg(adapter->pdev,
2349                                         scb->scp->request_buffer,
2350                                         scb->scp->use_sg, PCI_DMA_FROMDEVICE);
2351                 }
2352
2353                 pci_unmap_sg(adapter->pdev, scb->scp->request_buffer,
2354                         scb->scp->use_sg, scb->dma_direction);
2355
2356                 break;
2357
2358         default:
2359                 break;
2360         }
2361
2362         return;
2363 }
2364
2365
2366 /**
2367  * megaraid_mbox_dpc - the tasklet to complete the commands from completed list
2368  * @devp        : pointer to HBA soft state
2369  *
2370  * Pick up the commands from the completed list and send back to the owners.
2371  * This is a reentrant function and does not assume any locks are held while
2372  * it is being called.
2373  */
2374 static void
2375 megaraid_mbox_dpc(unsigned long devp)
2376 {
2377         adapter_t               *adapter = (adapter_t *)devp;
2378         mraid_device_t          *raid_dev;
2379         struct list_head        clist;
2380         struct scatterlist      *sgl;
2381         scb_t                   *scb;
2382         scb_t                   *tmp;
2383         struct scsi_cmnd        *scp;
2384         mraid_passthru_t        *pthru;
2385         mraid_epassthru_t       *epthru;
2386         mbox_ccb_t              *ccb;
2387         int                     islogical;
2388         int                     pdev_index;
2389         int                     pdev_state;
2390         mbox_t                  *mbox;
2391         unsigned long           flags;
2392         uint8_t                 c;
2393         int                     status;
2394
2395
2396         if (!adapter) return;
2397
2398         raid_dev = ADAP2RAIDDEV(adapter);
2399
2400         // move the SCBs from the completed list to our local list
2401         INIT_LIST_HEAD(&clist);
2402
2403         spin_lock_irqsave(COMPLETED_LIST_LOCK(adapter), flags);
2404
2405         list_splice_init(&adapter->completed_list, &clist);
2406
2407         spin_unlock_irqrestore(COMPLETED_LIST_LOCK(adapter), flags);
2408
2409
2410         list_for_each_entry_safe(scb, tmp, &clist, list) {
2411
2412                 status          = scb->status;
2413                 scp             = scb->scp;
2414                 ccb             = (mbox_ccb_t *)scb->ccb;
2415                 pthru           = ccb->pthru;
2416                 epthru          = ccb->epthru;
2417                 mbox            = ccb->mbox;
2418
2419                 // Make sure f/w has completed a valid command
2420                 if (scb->state != SCB_ISSUED) {
2421                         con_log(CL_ANN, (KERN_CRIT
2422                         "megaraid critical err: invalid command %d:%d:%p\n",
2423                                 scb->sno, scb->state, scp));
2424                         BUG();
2425                         continue;       // Must never happen!
2426                 }
2427
2428                 // check for the management command and complete it right away
2429                 if (scb->sno >= MBOX_MAX_SCSI_CMDS) {
2430                         scb->state      = SCB_FREE;
2431                         scb->status     = status;
2432
2433                         // remove from local clist
2434                         list_del_init(&scb->list);
2435
2436                         megaraid_mbox_mm_done(adapter, scb);
2437
2438                         continue;
2439                 }
2440
2441                 // Was an abort issued for this command earlier
2442                 if (scb->state & SCB_ABORT) {
2443                         con_log(CL_ANN, (KERN_NOTICE
2444                         "megaraid: aborted cmd %lx[%x] completed\n",
2445                                 scp->serial_number, scb->sno));
2446                 }
2447
2448                 /*
2449                  * If the inquiry came of a disk drive which is not part of
2450                  * any RAID array, expose it to the kernel. For this to be
2451                  * enabled, user must set the "megaraid_expose_unconf_disks"
2452                  * flag to 1 by specifying it on module parameter list.
2453                  * This would enable data migration off drives from other
2454                  * configurations.
2455                  */
2456                 islogical = MRAID_IS_LOGICAL(adapter, scp);
2457                 if (scp->cmnd[0] == INQUIRY && status == 0 && islogical == 0
2458                                 && IS_RAID_CH(raid_dev, scb->dev_channel)) {
2459
2460                         if (scp->use_sg) {
2461                                 sgl = (struct scatterlist *)
2462                                         scp->request_buffer;
2463
2464                                 if (sgl->page) {
2465                                         c = *(unsigned char *)
2466                                         (page_address((&sgl[0])->page) +
2467                                                 (&sgl[0])->offset);
2468                                 }
2469                                 else {
2470                                         con_log(CL_ANN, (KERN_WARNING
2471                                         "megaraid mailbox: invalid sg:%d\n",
2472                                         __LINE__));
2473                                         c = 0;
2474                                 }
2475                         }
2476                         else {
2477                                 c = *(uint8_t *)scp->request_buffer;
2478                         }
2479
2480                         if ((c & 0x1F ) == TYPE_DISK) {
2481                                 pdev_index = (scb->dev_channel * 16) +
2482                                         scb->dev_target;
2483                                 pdev_state =
2484                                         raid_dev->pdrv_state[pdev_index] & 0x0F;
2485
2486                                 if (pdev_state == PDRV_ONLINE           ||
2487                                         pdev_state == PDRV_FAILED       ||
2488                                         pdev_state == PDRV_RBLD         ||
2489                                         pdev_state == PDRV_HOTSPARE     ||
2490                                         megaraid_expose_unconf_disks == 0) {
2491
2492                                         status = 0xF0;
2493                                 }
2494                         }
2495                 }
2496
2497                 // Convert MegaRAID status to Linux error code
2498                 switch (status) {
2499
2500                 case 0x00:
2501
2502                         scp->result = (DID_OK << 16);
2503                         break;
2504
2505                 case 0x02:
2506
2507                         /* set sense_buffer and result fields */
2508                         if (mbox->cmd == MBOXCMD_PASSTHRU ||
2509                                 mbox->cmd == MBOXCMD_PASSTHRU64) {
2510
2511                                 memcpy(scp->sense_buffer, pthru->reqsensearea,
2512                                                 14);
2513
2514                                 scp->result = DRIVER_SENSE << 24 |
2515                                         DID_OK << 16 | CHECK_CONDITION << 1;
2516                         }
2517                         else {
2518                                 if (mbox->cmd == MBOXCMD_EXTPTHRU) {
2519
2520                                         memcpy(scp->sense_buffer,
2521                                                 epthru->reqsensearea, 14);
2522
2523                                         scp->result = DRIVER_SENSE << 24 |
2524                                                 DID_OK << 16 |
2525                                                 CHECK_CONDITION << 1;
2526                                 } else {
2527                                         scp->sense_buffer[0] = 0x70;
2528                                         scp->sense_buffer[2] = ABORTED_COMMAND;
2529                                         scp->result = CHECK_CONDITION << 1;
2530                                 }
2531                         }
2532                         break;
2533
2534                 case 0x08:
2535
2536                         scp->result = DID_BUS_BUSY << 16 | status;
2537                         break;
2538
2539                 default:
2540
2541                         /*
2542                          * If TEST_UNIT_READY fails, we know RESERVATION_STATUS
2543                          * failed
2544                          */
2545                         if (scp->cmnd[0] == TEST_UNIT_READY) {
2546                                 scp->result = DID_ERROR << 16 |
2547                                         RESERVATION_CONFLICT << 1;
2548                         }
2549                         else
2550                         /*
2551                          * Error code returned is 1 if Reserve or Release
2552                          * failed or the input parameter is invalid
2553                          */
2554                         if (status == 1 && (scp->cmnd[0] == RESERVE ||
2555                                          scp->cmnd[0] == RELEASE)) {
2556
2557                                 scp->result = DID_ERROR << 16 |
2558                                         RESERVATION_CONFLICT << 1;
2559                         }
2560                         else {
2561                                 scp->result = DID_BAD_TARGET << 16 | status;
2562                         }
2563                 }
2564
2565                 // print a debug message for all failed commands
2566                 if (status) {
2567                         megaraid_mbox_display_scb(adapter, scb);
2568                 }
2569
2570                 // Free our internal resources and call the mid-layer callback
2571                 // routine
2572                 megaraid_mbox_sync_scb(adapter, scb);
2573
2574                 // remove from local clist
2575                 list_del_init(&scb->list);
2576
2577                 // put back in free list
2578                 megaraid_dealloc_scb(adapter, scb);
2579
2580                 // send the scsi packet back to kernel
2581                 spin_lock(adapter->host_lock);
2582                 scp->scsi_done(scp);
2583                 spin_unlock(adapter->host_lock);
2584         }
2585
2586         return;
2587 }
2588
2589
2590 /**
2591  * megaraid_abort_handler - abort the scsi command
2592  * @scp         : command to be aborted
2593  *
2594  * Abort a previous SCSI request. Only commands on the pending list can be
2595  * aborted. All the commands issued to the F/W must complete.
2596  **/
2597 static int
2598 megaraid_abort_handler(struct scsi_cmnd *scp)
2599 {
2600         adapter_t               *adapter;
2601         mraid_device_t          *raid_dev;
2602         scb_t                   *scb;
2603         scb_t                   *tmp;
2604         int                     found;
2605         unsigned long           flags;
2606         int                     i;
2607
2608
2609         adapter         = SCP2ADAPTER(scp);
2610         raid_dev        = ADAP2RAIDDEV(adapter);
2611
2612         ASSERT(spin_is_locked(adapter->host_lock));
2613
2614         con_log(CL_ANN, (KERN_WARNING
2615                 "megaraid: aborting-%ld cmd=%x <c=%d t=%d l=%d>\n",
2616                 scp->serial_number, scp->cmnd[0], SCP2CHANNEL(scp),
2617                 SCP2TARGET(scp), SCP2LUN(scp)));
2618
2619         // If FW has stopped responding, simply return failure
2620         if (raid_dev->hw_error) {
2621                 con_log(CL_ANN, (KERN_NOTICE
2622                         "megaraid: hw error, not aborting\n"));
2623                 return FAILED;
2624         }
2625
2626         // There might a race here, where the command was completed by the
2627         // firmware and now it is on the completed list. Before we could
2628         // complete the command to the kernel in dpc, the abort came.
2629         // Find out if this is the case to avoid the race.
2630         scb = NULL;
2631         spin_lock_irqsave(COMPLETED_LIST_LOCK(adapter), flags);
2632         list_for_each_entry_safe(scb, tmp, &adapter->completed_list, list) {
2633
2634                 if (scb->scp == scp) {  // Found command
2635
2636                         list_del_init(&scb->list);      // from completed list
2637
2638                         con_log(CL_ANN, (KERN_WARNING
2639                         "megaraid: %ld:%d[%d:%d], abort from completed list\n",
2640                                 scp->serial_number, scb->sno,
2641                                 scb->dev_channel, scb->dev_target));
2642
2643                         scp->result = (DID_ABORT << 16);
2644                         scp->scsi_done(scp);
2645
2646                         megaraid_dealloc_scb(adapter, scb);
2647
2648                         spin_unlock_irqrestore(COMPLETED_LIST_LOCK(adapter),
2649                                 flags);
2650
2651                         return SUCCESS;
2652                 }
2653         }
2654         spin_unlock_irqrestore(COMPLETED_LIST_LOCK(adapter), flags);
2655
2656
2657         // Find out if this command is still on the pending list. If it is and
2658         // was never issued, abort and return success. If the command is owned
2659         // by the firmware, we must wait for it to complete by the FW.
2660         spin_lock_irqsave(PENDING_LIST_LOCK(adapter), flags);
2661         list_for_each_entry_safe(scb, tmp, &adapter->pend_list, list) {
2662
2663                 if (scb->scp == scp) {  // Found command
2664
2665                         list_del_init(&scb->list);      // from pending list
2666
2667                         ASSERT(!(scb->state & SCB_ISSUED));
2668
2669                         con_log(CL_ANN, (KERN_WARNING
2670                                 "megaraid abort: %ld[%d:%d], driver owner\n",
2671                                 scp->serial_number, scb->dev_channel,
2672                                 scb->dev_target));
2673
2674                         scp->result = (DID_ABORT << 16);
2675                         scp->scsi_done(scp);
2676
2677                         megaraid_dealloc_scb(adapter, scb);
2678
2679                         spin_unlock_irqrestore(PENDING_LIST_LOCK(adapter),
2680                                 flags);
2681
2682                         return SUCCESS;
2683                 }
2684         }
2685         spin_unlock_irqrestore(PENDING_LIST_LOCK(adapter), flags);
2686
2687
2688         // Check do we even own this command, in which case this would be
2689         // owned by the firmware. The only way to locate the FW scb is to
2690         // traverse through the list of all SCB, since driver does not
2691         // maintain these SCBs on any list
2692         found = 0;
2693         for (i = 0; i < MBOX_MAX_SCSI_CMDS; i++) {
2694                 scb = adapter->kscb_list + i;
2695
2696                 if (scb->scp == scp) {
2697
2698                         found = 1;
2699
2700                         if (!(scb->state & SCB_ISSUED)) {
2701                                 con_log(CL_ANN, (KERN_WARNING
2702                                 "megaraid abort: %ld%d[%d:%d], invalid state\n",
2703                                 scp->serial_number, scb->sno, scb->dev_channel,
2704                                 scb->dev_target));
2705                                 BUG();
2706                         }
2707                         else {
2708                                 con_log(CL_ANN, (KERN_WARNING
2709                                 "megaraid abort: %ld:%d[%d:%d], fw owner\n",
2710                                 scp->serial_number, scb->sno, scb->dev_channel,
2711                                 scb->dev_target));
2712                         }
2713                 }
2714         }
2715
2716         if (!found) {
2717                 con_log(CL_ANN, (KERN_WARNING
2718                         "megaraid abort: scsi cmd:%ld, do now own\n",
2719                         scp->serial_number));
2720
2721                 // FIXME: Should there be a callback for this command?
2722                 return SUCCESS;
2723         }
2724
2725         // We cannot actually abort a command owned by firmware, return
2726         // failure and wait for reset. In host reset handler, we will find out
2727         // if the HBA is still live
2728         return FAILED;
2729 }
2730
2731
2732 /**
2733  * megaraid_reset_handler - device reset hadler for mailbox based driver
2734  * @scp         : reference command
2735  *
2736  * Reset handler for the mailbox based controller. First try to find out if
2737  * the FW is still live, in which case the outstanding commands counter mut go
2738  * down to 0. If that happens, also issue the reservation reset command to
2739  * relinquish (possible) reservations on the logical drives connected to this
2740  * host
2741  **/
2742 static int
2743 megaraid_reset_handler(struct scsi_cmnd *scp)
2744 {
2745         adapter_t       *adapter;
2746         scb_t           *scb;
2747         scb_t           *tmp;
2748         mraid_device_t  *raid_dev;
2749         unsigned long   flags;
2750         uint8_t         raw_mbox[sizeof(mbox_t)];
2751         int             rval;
2752         int             recovery_window;
2753         int             recovering;
2754         int             i;
2755
2756         adapter         = SCP2ADAPTER(scp);
2757         raid_dev        = ADAP2RAIDDEV(adapter);
2758
2759         ASSERT(spin_is_locked(adapter->host_lock));
2760
2761         con_log(CL_ANN, (KERN_WARNING "megaraid: reseting the host...\n"));
2762
2763         // return failure if adapter is not responding
2764         if (raid_dev->hw_error) {
2765                 con_log(CL_ANN, (KERN_NOTICE
2766                         "megaraid: hw error, cannot reset\n"));
2767                 return FAILED;
2768         }
2769
2770
2771         // Under exceptional conditions, FW can take up to 3 minutes to
2772         // complete command processing. Wait for additional 2 minutes for the
2773         // pending commands counter to go down to 0. If it doesn't, let the
2774         // controller be marked offline
2775         // Also, reset all the commands currently owned by the driver
2776         spin_lock_irqsave(PENDING_LIST_LOCK(adapter), flags);
2777         list_for_each_entry_safe(scb, tmp, &adapter->pend_list, list) {
2778
2779                 list_del_init(&scb->list);      // from pending list
2780
2781                 con_log(CL_ANN, (KERN_WARNING
2782                         "megaraid: %ld:%d[%d:%d], reset from pending list\n",
2783                                 scp->serial_number, scb->sno,
2784                                 scb->dev_channel, scb->dev_target));
2785
2786                 scp->result = (DID_RESET << 16);
2787                 scp->scsi_done(scp);
2788
2789                 megaraid_dealloc_scb(adapter, scb);
2790         }
2791         spin_unlock_irqrestore(PENDING_LIST_LOCK(adapter), flags);
2792
2793         if (adapter->outstanding_cmds) {
2794                 con_log(CL_ANN, (KERN_NOTICE
2795                         "megaraid: %d outstanding commands. Max wait %d sec\n",
2796                         adapter->outstanding_cmds, MBOX_RESET_WAIT));
2797         }
2798
2799         spin_unlock(adapter->host_lock);
2800
2801         recovery_window = MBOX_RESET_WAIT + MBOX_RESET_EXT_WAIT;
2802
2803         recovering = adapter->outstanding_cmds;
2804
2805         for (i = 0; i < recovery_window && adapter->outstanding_cmds; i++) {
2806
2807                 megaraid_ack_sequence(adapter);
2808
2809                 // print a message once every 5 seconds only
2810                 if (!(i % 5)) {
2811                         con_log(CL_ANN, (
2812                         "megaraid mbox: Wait for %d commands to complete:%d\n",
2813                                 adapter->outstanding_cmds,
2814                                 MBOX_RESET_WAIT - i));
2815                 }
2816
2817                 // bailout if no recovery happended in reset time
2818                 if ((i == MBOX_RESET_WAIT) &&
2819                         (recovering == adapter->outstanding_cmds)) {
2820                         break;
2821                 }
2822
2823                 msleep(1000);
2824         }
2825
2826         spin_lock(adapter->host_lock);
2827
2828         // If still outstanding commands, bail out
2829         if (adapter->outstanding_cmds) {
2830                 con_log(CL_ANN, (KERN_WARNING
2831                         "megaraid mbox: critical hardware error!\n"));
2832
2833                 raid_dev->hw_error = 1;
2834
2835                 return FAILED;
2836         }
2837         else {
2838                 con_log(CL_ANN, (KERN_NOTICE
2839                 "megaraid mbox: reset sequence completed sucessfully\n"));
2840         }
2841
2842
2843         // If the controller supports clustering, reset reservations
2844         if (!adapter->ha) return SUCCESS;
2845
2846         // clear reservations if any
2847         raw_mbox[0] = CLUSTER_CMD;
2848         raw_mbox[2] = RESET_RESERVATIONS;
2849
2850         rval = SUCCESS;
2851         if (mbox_post_sync_cmd_fast(adapter, raw_mbox) == 0) {
2852                 con_log(CL_ANN,
2853                         (KERN_INFO "megaraid: reservation reset\n"));
2854         }
2855         else {
2856                 rval = FAILED;
2857                 con_log(CL_ANN, (KERN_WARNING
2858                                 "megaraid: reservation reset failed\n"));
2859         }
2860
2861         return rval;
2862 }
2863
2864
2865 /*
2866  * START: internal commands library
2867  *
2868  * This section of the driver has the common routine used by the driver and
2869  * also has all the FW routines
2870  */
2871
2872 /**
2873  * mbox_post_sync_cmd() - blocking command to the mailbox based controllers
2874  * @adapter     - controller's soft state
2875  * @raw_mbox    - the mailbox
2876  *
2877  * Issue a scb in synchronous and non-interrupt mode for mailbox based
2878  * controllers
2879  */
2880 static int
2881 mbox_post_sync_cmd(adapter_t *adapter, uint8_t raw_mbox[])
2882 {
2883         mraid_device_t  *raid_dev = ADAP2RAIDDEV(adapter);
2884         mbox64_t        *mbox64;
2885         mbox_t          *mbox;
2886         uint8_t         status;
2887         int             i;
2888
2889
2890         mbox64  = raid_dev->mbox64;
2891         mbox    = raid_dev->mbox;
2892
2893         /*
2894          * Wait until mailbox is free
2895          */
2896         if (megaraid_busywait_mbox(raid_dev) != 0)
2897                 goto blocked_mailbox;
2898
2899         /*
2900          * Copy mailbox data into host structure
2901          */
2902         memcpy((caddr_t)mbox, (caddr_t)raw_mbox, 16);
2903         mbox->cmdid             = 0xFE;
2904         mbox->busy              = 1;
2905         mbox->poll              = 0;
2906         mbox->ack               = 0;
2907         mbox->numstatus         = 0xFF;
2908         mbox->status            = 0xFF;
2909
2910         wmb();
2911         WRINDOOR(raid_dev, raid_dev->mbox_dma | 0x1);
2912
2913         // wait for maximum 1 second for status to post. If the status is not
2914         // available within 1 second, assume FW is initializing and wait
2915         // for an extended amount of time
2916         if (mbox->numstatus == 0xFF) {  // status not yet available
2917                 udelay(25);;
2918
2919                 for (i = 0; mbox->numstatus == 0xFF && i < 1000; i++) {
2920                         rmb();
2921                         msleep(1);
2922                 }
2923
2924
2925                 if (i == 1000) {
2926                         con_log(CL_ANN, (KERN_NOTICE
2927                                 "megaraid mailbox: wait for FW to boot      "));
2928
2929                         for (i = 0; (mbox->numstatus == 0xFF) &&
2930                                         (i < MBOX_RESET_WAIT); i++) {
2931                                 rmb();
2932                                 con_log(CL_ANN, ("\b\b\b\b\b[%03d]",
2933                                                         MBOX_RESET_WAIT - i));
2934                                 msleep(1000);
2935                         }
2936
2937                         if (i == MBOX_RESET_WAIT) {
2938
2939                                 con_log(CL_ANN, (
2940                                 "\nmegaraid mailbox: status not available\n"));
2941
2942                                 return -1;
2943                         }
2944                         con_log(CL_ANN, ("\b\b\b\b\b[ok] \n"));
2945                 }
2946         }
2947
2948         // wait for maximum 1 second for poll semaphore
2949         if (mbox->poll != 0x77) {
2950                 udelay(25);
2951
2952                 for (i = 0; (mbox->poll != 0x77) && (i < 1000); i++) {
2953                         rmb();
2954                         msleep(1);
2955                 }
2956
2957                 if (i == 1000) {
2958                         con_log(CL_ANN, (KERN_WARNING
2959                         "megaraid mailbox: could not get poll semaphore\n"));
2960                         return -1;
2961                 }
2962         }
2963
2964         WRINDOOR(raid_dev, raid_dev->mbox_dma | 0x2);
2965         wmb();
2966
2967         // wait for maximum 1 second for acknowledgement
2968         if (RDINDOOR(raid_dev) & 0x2) {
2969                 udelay(25);
2970
2971                 for (i = 0; (RDINDOOR(raid_dev) & 0x2) && (i < 1000); i++) {
2972                         rmb();
2973                         msleep(1);
2974                 }
2975
2976                 if (i == 1000) {
2977                         con_log(CL_ANN, (KERN_WARNING
2978                                 "megaraid mailbox: could not acknowledge\n"));
2979                         return -1;
2980                 }
2981         }
2982         mbox->poll      = 0;
2983         mbox->ack       = 0x77;
2984
2985         status = mbox->status;
2986
2987         // invalidate the completed command id array. After command
2988         // completion, firmware would write the valid id.
2989         mbox->numstatus = 0xFF;
2990         mbox->status    = 0xFF;
2991         for (i = 0; i < MBOX_MAX_FIRMWARE_STATUS; i++) {
2992                 mbox->completed[i] = 0xFF;
2993         }
2994
2995         return status;
2996
2997 blocked_mailbox:
2998
2999         con_log(CL_ANN, (KERN_WARNING "megaraid: blocked mailbox\n") );
3000         return -1;
3001 }
3002
3003
3004 /**
3005  * mbox_post_sync_cmd_fast - blocking command to the mailbox based controllers
3006  * @adapter     - controller's soft state
3007  * @raw_mbox    - the mailbox
3008  *
3009  * Issue a scb in synchronous and non-interrupt mode for mailbox based
3010  * controllers. This is a faster version of the synchronous command and
3011  * therefore can be called in interrupt-context as well
3012  */
3013 static int
3014 mbox_post_sync_cmd_fast(adapter_t *adapter, uint8_t raw_mbox[])
3015 {
3016         mraid_device_t  *raid_dev = ADAP2RAIDDEV(adapter);
3017         mbox_t          *mbox;
3018         long            i;
3019
3020
3021         mbox    = raid_dev->mbox;
3022
3023         // return immediately if the mailbox is busy
3024         if (mbox->busy) return -1;
3025
3026         // Copy mailbox data into host structure
3027         memcpy((caddr_t)mbox, (caddr_t)raw_mbox, 14);
3028         mbox->cmdid             = 0xFE;
3029         mbox->busy              = 1;
3030         mbox->poll              = 0;
3031         mbox->ack               = 0;
3032         mbox->numstatus         = 0xFF;
3033         mbox->status            = 0xFF;
3034
3035         wmb();
3036         WRINDOOR(raid_dev, raid_dev->mbox_dma | 0x1);
3037
3038         for (i = 0; i < 0xFFFFF; i++) {
3039                 if (mbox->numstatus != 0xFF) break;
3040         }
3041
3042         if (i == 0xFFFFF) {
3043                 // We may need to re-calibrate the counter
3044                 con_log(CL_ANN, (KERN_CRIT
3045                         "megaraid: fast sync command timed out\n"));
3046         }
3047
3048         WRINDOOR(raid_dev, raid_dev->mbox_dma | 0x2);
3049         wmb();
3050
3051         return mbox->status;
3052 }
3053
3054
3055 /**
3056  * megaraid_busywait_mbox() - Wait until the controller's mailbox is available
3057  * @raid_dev    - RAID device (HBA) soft state
3058  *
3059  * wait until the controller's mailbox is available to accept more commands.
3060  * wait for at most 1 second
3061  */
3062 static int
3063 megaraid_busywait_mbox(mraid_device_t *raid_dev)
3064 {
3065         mbox_t  *mbox = raid_dev->mbox;
3066         int     i = 0;
3067
3068         if (mbox->busy) {
3069                 udelay(25);
3070                 for (i = 0; mbox->busy && i < 1000; i++)
3071                         msleep(1);
3072         }
3073
3074         if (i < 1000) return 0;
3075         else return -1;
3076 }
3077
3078
3079 /**
3080  * megaraid_mbox_product_info - some static information about the controller
3081  * @adapter     - our soft state
3082  *
3083  * issue commands to the controller to grab some parameters required by our
3084  * caller.
3085  */
3086 static int
3087 megaraid_mbox_product_info(adapter_t *adapter)
3088 {
3089         mraid_device_t          *raid_dev = ADAP2RAIDDEV(adapter);
3090         mbox_t                  *mbox;
3091         uint8_t                 raw_mbox[sizeof(mbox_t)];
3092         mraid_pinfo_t           *pinfo;
3093         dma_addr_t              pinfo_dma_h;
3094         mraid_inquiry3_t        *mraid_inq3;
3095         int                     i;
3096
3097
3098         memset((caddr_t)raw_mbox, 0, sizeof(raw_mbox));
3099         mbox = (mbox_t *)raw_mbox;
3100
3101         /*
3102          * Issue an ENQUIRY3 command to find out certain adapter parameters,
3103          * e.g., max channels, max commands etc.
3104          */
3105         pinfo = pci_alloc_consistent(adapter->pdev, sizeof(mraid_pinfo_t),
3106                         &pinfo_dma_h);
3107
3108         if (pinfo == NULL) {
3109                 con_log(CL_ANN, (KERN_WARNING
3110                         "megaraid: out of memory, %s %d\n", __FUNCTION__,
3111                         __LINE__));
3112
3113                 return -1;
3114         }
3115         memset(pinfo, 0, sizeof(mraid_pinfo_t));
3116
3117         mbox->xferaddr = (uint32_t)adapter->ibuf_dma_h;
3118         memset((void *)adapter->ibuf, 0, MBOX_IBUF_SIZE);
3119
3120         raw_mbox[0] = FC_NEW_CONFIG;
3121         raw_mbox[2] = NC_SUBOP_ENQUIRY3;
3122         raw_mbox[3] = ENQ3_GET_SOLICITED_FULL;
3123
3124         // Issue the command
3125         if (mbox_post_sync_cmd(adapter, raw_mbox) != 0) {
3126
3127                 con_log(CL_ANN, (KERN_WARNING "megaraid: Inquiry3 failed\n"));
3128
3129                 pci_free_consistent(adapter->pdev, sizeof(mraid_pinfo_t),
3130                         pinfo, pinfo_dma_h);
3131
3132                 return -1;
3133         }
3134
3135         /*
3136          * Collect information about state of each physical drive
3137          * attached to the controller. We will expose all the disks
3138          * which are not part of RAID
3139          */
3140         mraid_inq3 = (mraid_inquiry3_t *)adapter->ibuf;
3141         for (i = 0; i < MBOX_MAX_PHYSICAL_DRIVES; i++) {
3142                 raid_dev->pdrv_state[i] = mraid_inq3->pdrv_state[i];
3143         }
3144
3145         /*
3146          * Get product info for information like number of channels,
3147          * maximum commands supported.
3148          */
3149         memset((caddr_t)raw_mbox, 0, sizeof(raw_mbox));
3150         mbox->xferaddr = (uint32_t)pinfo_dma_h;
3151
3152         raw_mbox[0] = FC_NEW_CONFIG;
3153         raw_mbox[2] = NC_SUBOP_PRODUCT_INFO;
3154
3155         if (mbox_post_sync_cmd(adapter, raw_mbox) != 0) {
3156
3157                 con_log(CL_ANN, (KERN_WARNING
3158                         "megaraid: product info failed\n"));
3159
3160                 pci_free_consistent(adapter->pdev, sizeof(mraid_pinfo_t),
3161                         pinfo, pinfo_dma_h);
3162
3163                 return -1;
3164         }
3165
3166         /*
3167          * Setup some parameters for host, as required by our caller
3168          */
3169         adapter->max_channel = pinfo->nchannels;
3170
3171         /*
3172          * we will export all the logical drives on a single channel.
3173          * Add 1 since inquires do not come for inititor ID
3174          */
3175         adapter->max_target     = MAX_LOGICAL_DRIVES_40LD + 1;
3176         adapter->max_lun        = 8;    // up to 8 LUNs for non-disk devices
3177
3178         /*
3179          * These are the maximum outstanding commands for the scsi-layer
3180          */
3181         adapter->max_cmds       = MBOX_MAX_SCSI_CMDS;
3182
3183         memset(adapter->fw_version, 0, VERSION_SIZE);
3184         memset(adapter->bios_version, 0, VERSION_SIZE);
3185
3186         memcpy(adapter->fw_version, pinfo->fw_version, 4);
3187         adapter->fw_version[4] = 0;
3188
3189         memcpy(adapter->bios_version, pinfo->bios_version, 4);
3190         adapter->bios_version[4] = 0;
3191
3192         con_log(CL_ANN, (KERN_NOTICE
3193                 "megaraid: fw version:[%s] bios version:[%s]\n",
3194                 adapter->fw_version, adapter->bios_version));
3195
3196         pci_free_consistent(adapter->pdev, sizeof(mraid_pinfo_t), pinfo,
3197                         pinfo_dma_h);
3198
3199         return 0;
3200 }
3201
3202
3203
3204 /**
3205  * megaraid_mbox_extended_cdb - check for support for extended CDBs
3206  * @adapter     - soft state for the controller
3207  *
3208  * this routine check whether the controller in question supports extended
3209  * ( > 10 bytes ) CDBs
3210  */
3211 static int
3212 megaraid_mbox_extended_cdb(adapter_t *adapter)
3213 {
3214         mbox_t          *mbox;
3215         uint8_t         raw_mbox[sizeof(mbox_t)];
3216         int             rval;
3217
3218         mbox = (mbox_t *)raw_mbox;
3219
3220         memset((caddr_t)raw_mbox, 0, sizeof(raw_mbox));
3221         mbox->xferaddr  = (uint32_t)adapter->ibuf_dma_h;
3222
3223         memset((void *)adapter->ibuf, 0, MBOX_IBUF_SIZE);
3224
3225         raw_mbox[0] = MAIN_MISC_OPCODE;
3226         raw_mbox[2] = SUPPORT_EXT_CDB;
3227
3228         /*
3229          * Issue the command
3230          */
3231         rval = 0;
3232         if (mbox_post_sync_cmd(adapter, raw_mbox) != 0) {
3233                 rval = -1;
3234         }
3235
3236         return rval;
3237 }
3238
3239
3240 /**
3241  * megaraid_mbox_support_ha - Do we support clustering
3242  * @adapter     - soft state for the controller
3243  * @init_id     - ID of the initiator
3244  *
3245  * Determine if the firmware supports clustering and the ID of the initiator.
3246  */
3247 static int
3248 megaraid_mbox_support_ha(adapter_t *adapter, uint16_t *init_id)
3249 {
3250         mbox_t          *mbox;
3251         uint8_t         raw_mbox[sizeof(mbox_t)];
3252         int             rval;
3253
3254
3255         mbox = (mbox_t *)raw_mbox;
3256
3257         memset((caddr_t)raw_mbox, 0, sizeof(raw_mbox));
3258
3259         mbox->xferaddr = (uint32_t)adapter->ibuf_dma_h;
3260
3261         memset((void *)adapter->ibuf, 0, MBOX_IBUF_SIZE);
3262
3263         raw_mbox[0] = GET_TARGET_ID;
3264
3265         // Issue the command
3266         *init_id = 7;
3267         rval =  -1;
3268         if (mbox_post_sync_cmd(adapter, raw_mbox) == 0) {
3269
3270                 *init_id = *(uint8_t *)adapter->ibuf;
3271
3272                 con_log(CL_ANN, (KERN_INFO
3273                         "megaraid: cluster firmware, initiator ID: %d\n",
3274                         *init_id));
3275
3276                 rval =  0;
3277         }
3278
3279         return rval;
3280 }
3281
3282
3283 /**
3284  * megaraid_mbox_support_random_del - Do we support random deletion
3285  * @adapter     - soft state for the controller
3286  *
3287  * Determine if the firmware supports random deletion
3288  * Return:      1 is operation supported, 0 otherwise
3289  */
3290 static int
3291 megaraid_mbox_support_random_del(adapter_t *adapter)
3292 {
3293         mbox_t          *mbox;
3294         uint8_t         raw_mbox[sizeof(mbox_t)];
3295         int             rval;
3296
3297
3298         mbox = (mbox_t *)raw_mbox;
3299
3300         memset((caddr_t)raw_mbox, 0, sizeof(mbox_t));
3301
3302         raw_mbox[0] = FC_DEL_LOGDRV;
3303         raw_mbox[0] = OP_SUP_DEL_LOGDRV;
3304
3305         // Issue the command
3306         rval = 0;
3307         if (mbox_post_sync_cmd(adapter, raw_mbox) == 0) {
3308
3309                 con_log(CL_DLEVEL1, ("megaraid: supports random deletion\n"));
3310
3311                 rval =  1;
3312         }
3313
3314         return rval;
3315 }
3316
3317
3318 /**
3319  * megaraid_mbox_get_max_sg - maximum sg elements supported by the firmware
3320  * @adapter     - soft state for the controller
3321  *
3322  * Find out the maximum number of scatter-gather elements supported by the
3323  * firmware
3324  */
3325 static int
3326 megaraid_mbox_get_max_sg(adapter_t *adapter)
3327 {
3328         mbox_t          *mbox;
3329         uint8_t         raw_mbox[sizeof(mbox_t)];
3330         int             nsg;
3331
3332
3333         mbox = (mbox_t *)raw_mbox;
3334
3335         memset((caddr_t)raw_mbox, 0, sizeof(mbox_t));
3336
3337         mbox->xferaddr = (uint32_t)adapter->ibuf_dma_h;
3338
3339         memset((void *)adapter->ibuf, 0, MBOX_IBUF_SIZE);
3340
3341         raw_mbox[0] = MAIN_MISC_OPCODE;
3342         raw_mbox[2] = GET_MAX_SG_SUPPORT;
3343
3344         // Issue the command
3345         if (mbox_post_sync_cmd(adapter, raw_mbox) == 0) {
3346                 nsg =  *(uint8_t *)adapter->ibuf;
3347         }
3348         else {
3349                 nsg =  MBOX_DEFAULT_SG_SIZE;
3350         }
3351
3352         if (nsg > MBOX_MAX_SG_SIZE) nsg = MBOX_MAX_SG_SIZE;
3353
3354         return nsg;
3355 }
3356
3357
3358 /**
3359  * megaraid_mbox_enum_raid_scsi - enumerate the RAID and SCSI channels
3360  * @adapter     - soft state for the controller
3361  *
3362  * Enumerate the RAID and SCSI channels for ROMB platoforms so that channels
3363  * can be exported as regular SCSI channels
3364  */
3365 static void
3366 megaraid_mbox_enum_raid_scsi(adapter_t *adapter)
3367 {
3368         mraid_device_t  *raid_dev = ADAP2RAIDDEV(adapter);
3369         mbox_t          *mbox;
3370         uint8_t         raw_mbox[sizeof(mbox_t)];
3371
3372
3373         mbox = (mbox_t *)raw_mbox;
3374
3375         memset((caddr_t)raw_mbox, 0, sizeof(mbox_t));
3376
3377         mbox->xferaddr = (uint32_t)adapter->ibuf_dma_h;
3378
3379         memset((void *)adapter->ibuf, 0, MBOX_IBUF_SIZE);
3380
3381         raw_mbox[0] = CHNL_CLASS;
3382         raw_mbox[2] = GET_CHNL_CLASS;
3383
3384         // Issue the command. If the command fails, all channels are RAID
3385         // channels
3386         raid_dev->channel_class = 0xFF;
3387         if (mbox_post_sync_cmd(adapter, raw_mbox) == 0) {
3388                 raid_dev->channel_class =  *(uint8_t *)adapter->ibuf;
3389         }
3390
3391         return;
3392 }
3393
3394
3395 /**
3396  * megaraid_mbox_flush_cache - flush adapter and disks cache
3397  * @param adapter       : soft state for the controller
3398  *
3399  * Flush adapter cache followed by disks cache
3400  */
3401 static void
3402 megaraid_mbox_flush_cache(adapter_t *adapter)
3403 {
3404         mbox_t  *mbox;
3405         uint8_t raw_mbox[sizeof(mbox_t)];
3406
3407
3408         mbox = (mbox_t *)raw_mbox;
3409
3410         memset((caddr_t)raw_mbox, 0, sizeof(mbox_t));
3411
3412         raw_mbox[0] = FLUSH_ADAPTER;
3413
3414         if (mbox_post_sync_cmd(adapter, raw_mbox) != 0) {
3415                 con_log(CL_ANN, ("megaraid: flush adapter failed\n"));
3416         }
3417
3418         raw_mbox[0] = FLUSH_SYSTEM;
3419
3420         if (mbox_post_sync_cmd(adapter, raw_mbox) != 0) {
3421                 con_log(CL_ANN, ("megaraid: flush disks cache failed\n"));
3422         }
3423
3424         return;
3425 }
3426
3427
3428 /**
3429  * megaraid_mbox_display_scb - display SCB information, mostly debug purposes
3430  * @param adapter       : controllers' soft state
3431  * @param scb           : SCB to be displayed
3432  * @param level : debug level for console print
3433  *
3434  * Diplay information about the given SCB iff the current debug level is
3435  * verbose
3436  */
3437 static void
3438 megaraid_mbox_display_scb(adapter_t *adapter, scb_t *scb)
3439 {
3440         mbox_ccb_t              *ccb;
3441         struct scsi_cmnd        *scp;
3442         mbox_t                  *mbox;
3443         int                     level;
3444         int                     i;
3445
3446
3447         ccb     = (mbox_ccb_t *)scb->ccb;
3448         scp     = scb->scp;
3449         mbox    = ccb->mbox;
3450
3451         level = CL_DLEVEL3;
3452
3453         con_log(level, (KERN_NOTICE
3454                 "megaraid mailbox: status:%#x cmd:%#x id:%#x ", scb->status,
3455                 mbox->cmd, scb->sno));
3456
3457         con_log(level, ("sec:%#x lba:%#x addr:%#x ld:%d sg:%d\n",
3458                 mbox->numsectors, mbox->lba, mbox->xferaddr, mbox->logdrv,
3459                 mbox->numsge));
3460
3461         if (!scp) return;
3462
3463         con_log(level, (KERN_NOTICE "scsi cmnd: "));
3464
3465         for (i = 0; i < scp->cmd_len; i++) {
3466                 con_log(level, ("%#2.02x ", scp->cmnd[i]));
3467         }
3468
3469         con_log(level, ("\n"));
3470
3471         return;
3472 }
3473
3474
3475 /**
3476  * megaraid_mbox_setup_device_map - manage device ids
3477  * @adapter     : Driver's soft state
3478  *
3479  * Manange the device ids to have an appropraite mapping between the kernel
3480  * scsi addresses and megaraid scsi and logical drive addresses. We export
3481  * scsi devices on their actual addresses, whereas the logical drives are
3482  * exported on a virtual scsi channel.
3483  **/
3484 static void
3485 megaraid_mbox_setup_device_map(adapter_t *adapter)
3486 {
3487         uint8_t         c;
3488         uint8_t         t;
3489
3490         /*
3491          * First fill the values on the logical drive channel
3492          */
3493         for (t = 0; t < LSI_MAX_LOGICAL_DRIVES_64LD; t++)
3494                 adapter->device_ids[adapter->max_channel][t] =
3495                         (t < adapter->init_id) ?  t : t - 1;
3496
3497         adapter->device_ids[adapter->max_channel][adapter->init_id] = 0xFF;
3498
3499         /*
3500          * Fill the values on the physical devices channels
3501          */
3502         for (c = 0; c < adapter->max_channel; c++)
3503                 for (t = 0; t < LSI_MAX_LOGICAL_DRIVES_64LD; t++)
3504                         adapter->device_ids[c][t] = (c << 8) | t;
3505 }
3506
3507
3508 /*
3509  * END: internal commands library
3510  */
3511
3512 /*
3513  * START: Interface for the common management module
3514  *
3515  * This is the module, which interfaces with the common mangement module to
3516  * provide support for ioctl and sysfs
3517  */
3518
3519 /**
3520  * megaraid_cmm_register - register with the mangement module
3521  * @param adapter       : HBA soft state
3522  *
3523  * Register with the management module, which allows applications to issue
3524  * ioctl calls to the drivers. This interface is used by the management module
3525  * to setup sysfs support as well.
3526  */
3527 static int
3528 megaraid_cmm_register(adapter_t *adapter)
3529 {
3530         mraid_device_t  *raid_dev = ADAP2RAIDDEV(adapter);
3531         mraid_mmadp_t   adp;
3532         scb_t           *scb;
3533         mbox_ccb_t      *ccb;
3534         int             rval;
3535         int             i;
3536
3537         // Allocate memory for the base list of scb for management module.
3538         adapter->uscb_list = kmalloc(sizeof(scb_t) * MBOX_MAX_USER_CMDS,
3539                         GFP_KERNEL);
3540
3541         if (adapter->uscb_list == NULL) {
3542                 con_log(CL_ANN, (KERN_WARNING
3543                         "megaraid: out of memory, %s %d\n", __FUNCTION__,
3544                         __LINE__));
3545                 return -1;
3546         }
3547         memset(adapter->uscb_list, 0, sizeof(scb_t) * MBOX_MAX_USER_CMDS);
3548
3549
3550         // Initialize the synchronization parameters for resources for
3551         // commands for management module
3552         INIT_LIST_HEAD(&adapter->uscb_pool);
3553
3554         spin_lock_init(USER_FREE_LIST_LOCK(adapter));
3555
3556
3557
3558         // link all the packets. Note, CCB for commands, coming from the
3559         // commom management module, mailbox physical address are already
3560         // setup by it. We just need placeholder for that in our local command
3561         // control blocks
3562         for (i = 0; i < MBOX_MAX_USER_CMDS; i++) {
3563
3564                 scb                     = adapter->uscb_list + i;
3565                 ccb                     = raid_dev->uccb_list + i;
3566
3567                 scb->ccb                = (caddr_t)ccb;
3568                 ccb->mbox64             = raid_dev->umbox64 + i;
3569                 ccb->mbox               = &ccb->mbox64->mbox32;
3570                 ccb->raw_mbox           = (uint8_t *)ccb->mbox;
3571
3572                 scb->gp                 = 0;
3573
3574                 // COMMAND ID 0 - (MBOX_MAX_SCSI_CMDS-1) ARE RESERVED FOR
3575                 // COMMANDS COMING FROM IO SUBSYSTEM (MID-LAYER)
3576                 scb->sno                = i + MBOX_MAX_SCSI_CMDS;
3577
3578                 scb->scp                = NULL;
3579                 scb->state              = SCB_FREE;
3580                 scb->dma_direction      = PCI_DMA_NONE;
3581                 scb->dma_type           = MRAID_DMA_NONE;
3582                 scb->dev_channel        = -1;
3583                 scb->dev_target         = -1;
3584
3585                 // put scb in the free pool
3586                 list_add_tail(&scb->list, &adapter->uscb_pool);
3587         }
3588
3589         adp.unique_id           = adapter->unique_id;
3590         adp.drvr_type           = DRVRTYPE_MBOX;
3591         adp.drvr_data           = (unsigned long)adapter;
3592         adp.pdev                = adapter->pdev;
3593         adp.issue_uioc          = megaraid_mbox_mm_handler;
3594         adp.timeout             = 30;
3595         adp.max_kioc            = MBOX_MAX_USER_CMDS;
3596
3597         if ((rval = mraid_mm_register_adp(&adp)) != 0) {
3598
3599                 con_log(CL_ANN, (KERN_WARNING
3600                         "megaraid mbox: did not register with CMM\n"));
3601
3602                 kfree(adapter->uscb_list);
3603         }
3604
3605         return rval;
3606 }
3607
3608
3609 /**
3610  * megaraid_cmm_unregister - un-register with the mangement module
3611  * @param adapter       : HBA soft state
3612  *
3613  * Un-register with the management module.
3614  * FIXME: mgmt module must return failure for unregister if it has pending
3615  * commands in LLD
3616  */
3617 static int
3618 megaraid_cmm_unregister(adapter_t *adapter)
3619 {
3620         kfree(adapter->uscb_list);
3621         mraid_mm_unregister_adp(adapter->unique_id);
3622         return 0;
3623 }
3624
3625
3626 /**
3627  * megaraid_mbox_mm_handler - interface for CMM to issue commands to LLD
3628  * @param drvr_data     : LLD specific data
3629  * @param kioc          : CMM interface packet
3630  * @param action        : command action
3631  *
3632  * This routine is invoked whenever the Common Mangement Module (CMM) has a
3633  * command for us. The 'action' parameter specifies if this is a new command
3634  * or otherwise.
3635  */
3636 static int
3637 megaraid_mbox_mm_handler(unsigned long drvr_data, uioc_t *kioc, uint32_t action)
3638 {
3639         adapter_t *adapter;
3640
3641         if (action != IOCTL_ISSUE) {
3642                 con_log(CL_ANN, (KERN_WARNING
3643                         "megaraid: unsupported management action:%#2x\n",
3644                         action));
3645                 return (-ENOTSUPP);
3646         }
3647
3648         adapter = (adapter_t *)drvr_data;
3649
3650         // make sure this adapter is not being detached right now.
3651         if (atomic_read(&adapter->being_detached)) {
3652                 con_log(CL_ANN, (KERN_WARNING
3653                         "megaraid: reject management request, detaching\n"));
3654                 return (-ENODEV);
3655         }
3656
3657         switch (kioc->opcode) {
3658
3659         case GET_ADAP_INFO:
3660
3661                 kioc->status =  gather_hbainfo(adapter, (mraid_hba_info_t *)
3662                                         (unsigned long)kioc->buf_vaddr);
3663
3664                 kioc->done(kioc);
3665
3666                 return kioc->status;
3667
3668         case MBOX_CMD:
3669
3670                 return megaraid_mbox_mm_command(adapter, kioc);
3671
3672         default:
3673                 kioc->status = (-EINVAL);
3674                 kioc->done(kioc);
3675                 return (-EINVAL);
3676         }
3677
3678         return 0;       // not reached
3679 }
3680
3681 /**
3682  * megaraid_mbox_mm_command - issues commands routed through CMM
3683  * @param adapter       : HBA soft state
3684  * @param kioc          : management command packet
3685  *
3686  * Issues commands, which are routed through the management module.
3687  */
3688 static int
3689 megaraid_mbox_mm_command(adapter_t *adapter, uioc_t *kioc)
3690 {
3691         struct list_head        *head = &adapter->uscb_pool;
3692         mbox64_t                *mbox64;
3693         uint8_t                 *raw_mbox;
3694         scb_t                   *scb;
3695         mbox_ccb_t              *ccb;
3696         unsigned long           flags;
3697
3698         // detach one scb from free pool
3699         spin_lock_irqsave(USER_FREE_LIST_LOCK(adapter), flags);
3700
3701         if (list_empty(head)) { // should never happen because of CMM
3702
3703                 con_log(CL_ANN, (KERN_WARNING
3704                         "megaraid mbox: bug in cmm handler, lost resources\n"));
3705
3706                 spin_unlock_irqrestore(USER_FREE_LIST_LOCK(adapter), flags);
3707
3708                 return (-EINVAL);
3709         }
3710
3711         scb = list_entry(head->next, scb_t, list);
3712         list_del_init(&scb->list);
3713
3714         spin_unlock_irqrestore(USER_FREE_LIST_LOCK(adapter), flags);
3715
3716         scb->state      = SCB_ACTIVE;
3717         scb->dma_type   = MRAID_DMA_NONE;
3718
3719         ccb             = (mbox_ccb_t *)scb->ccb;
3720         mbox64          = (mbox64_t *)(unsigned long)kioc->cmdbuf;
3721         raw_mbox        = (uint8_t *)&mbox64->mbox32;
3722
3723         memcpy(ccb->mbox64, mbox64, sizeof(mbox64_t));
3724
3725         scb->gp         = (unsigned long)kioc;
3726
3727         /*
3728          * If it is a logdrv random delete operation, we have to wait till
3729          * there are no outstanding cmds at the fw and then issue it directly
3730          */
3731         if (raw_mbox[0] == FC_DEL_LOGDRV && raw_mbox[2] == OP_DEL_LOGDRV) {
3732
3733                 if (wait_till_fw_empty(adapter)) {
3734                         con_log(CL_ANN, (KERN_NOTICE
3735                                 "megaraid mbox: LD delete, timed out\n"));
3736
3737                         kioc->status = -ETIME;
3738
3739                         scb->status = -1;
3740
3741                         megaraid_mbox_mm_done(adapter, scb);
3742
3743                         return (-ETIME);
3744                 }
3745
3746                 INIT_LIST_HEAD(&scb->list);
3747
3748                 scb->state = SCB_ISSUED;
3749                 if (mbox_post_cmd(adapter, scb) != 0) {
3750
3751                         con_log(CL_ANN, (KERN_NOTICE
3752                                 "megaraid mbox: LD delete, mailbox busy\n"));
3753
3754                         kioc->status = -EBUSY;
3755
3756                         scb->status = -1;
3757
3758                         megaraid_mbox_mm_done(adapter, scb);
3759
3760                         return (-EBUSY);
3761                 }
3762
3763                 return 0;
3764         }
3765
3766         // put the command on the pending list and execute
3767         megaraid_mbox_runpendq(adapter, scb);
3768
3769         return 0;
3770 }
3771
3772
3773 static int
3774 wait_till_fw_empty(adapter_t *adapter)
3775 {
3776         unsigned long   flags = 0;
3777         int             i;
3778
3779
3780         /*
3781          * Set the quiescent flag to stop issuing cmds to FW.
3782          */
3783         spin_lock_irqsave(adapter->host_lock, flags);
3784         adapter->quiescent++;
3785         spin_unlock_irqrestore(adapter->host_lock, flags);
3786
3787         /*
3788          * Wait till there are no more cmds outstanding at FW. Try for at most
3789          * 60 seconds
3790          */
3791         for (i = 0; i < 60 && adapter->outstanding_cmds; i++) {
3792                 con_log(CL_DLEVEL1, (KERN_INFO
3793                         "megaraid: FW has %d pending commands\n",
3794                         adapter->outstanding_cmds));
3795
3796                 msleep(1000);
3797         }
3798
3799         return adapter->outstanding_cmds;
3800 }
3801
3802
3803 /**
3804  * megaraid_mbox_mm_done - callback for CMM commands
3805  * @adapter     : HBA soft state
3806  * @scb         : completed command
3807  *
3808  * Callback routine for internal commands originated from the management
3809  * module.
3810  */
3811 static void
3812 megaraid_mbox_mm_done(adapter_t *adapter, scb_t *scb)
3813 {
3814         uioc_t                  *kioc;
3815         mbox64_t                *mbox64;
3816         uint8_t                 *raw_mbox;
3817         unsigned long           flags;
3818
3819         kioc                    = (uioc_t *)scb->gp;
3820         kioc->status            = 0;
3821         mbox64                  = (mbox64_t *)(unsigned long)kioc->cmdbuf;
3822         mbox64->mbox32.status   = scb->status;
3823         raw_mbox                = (uint8_t *)&mbox64->mbox32;
3824
3825
3826         // put scb in the free pool
3827         scb->state      = SCB_FREE;
3828         scb->scp        = NULL;
3829
3830         spin_lock_irqsave(USER_FREE_LIST_LOCK(adapter), flags);
3831
3832         list_add(&scb->list, &adapter->uscb_pool);
3833
3834         spin_unlock_irqrestore(USER_FREE_LIST_LOCK(adapter), flags);
3835
3836         // if a delete logical drive operation succeeded, restart the
3837         // controller
3838         if (raw_mbox[0] == FC_DEL_LOGDRV && raw_mbox[2] == OP_DEL_LOGDRV) {
3839
3840                 adapter->quiescent--;
3841
3842                 megaraid_mbox_runpendq(adapter, NULL);
3843         }
3844
3845         kioc->done(kioc);
3846
3847         return;
3848 }
3849
3850
3851 /**
3852  * gather_hbainfo - HBA characteristics for the applications
3853  * @param adapter       : HBA soft state
3854  * @param hinfo         : pointer to the caller's host info strucuture
3855  */
3856 static int
3857 gather_hbainfo(adapter_t *adapter, mraid_hba_info_t *hinfo)
3858 {
3859         uint8_t dmajor;
3860
3861         dmajor                  = megaraid_mbox_version[0];
3862
3863         hinfo->pci_vendor_id    = adapter->pdev->vendor;
3864         hinfo->pci_device_id    = adapter->pdev->device;
3865         hinfo->subsys_vendor_id = adapter->pdev->subsystem_vendor;
3866         hinfo->subsys_device_id = adapter->pdev->subsystem_device;
3867
3868         hinfo->pci_bus          = adapter->pdev->bus->number;
3869         hinfo->pci_dev_fn       = adapter->pdev->devfn;
3870         hinfo->pci_slot         = PCI_SLOT(adapter->pdev->devfn);
3871         hinfo->irq              = adapter->host->irq;
3872         hinfo->baseport         = ADAP2RAIDDEV(adapter)->baseport;
3873
3874         hinfo->unique_id        = (hinfo->pci_bus << 8) | adapter->pdev->devfn;
3875         hinfo->host_no          = adapter->host->host_no;
3876
3877         return 0;
3878 }
3879
3880 /*
3881  * END: Interface for the common management module
3882  */
3883
3884
3885 /*
3886  * END: Mailbox Low Level Driver
3887  */
3888 module_init(megaraid_init);
3889 module_exit(megaraid_exit);
3890
3891 /* vim: set ts=8 sw=8 tw=78 ai si: */