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   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      : v2.20.4.7 (Nov 14 2005)
  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  *      Seokmann Ju             <Seokmann.Ju@lsil.com>
  20  *
  21  * List of supported controllers
  22  *
  23  * OEM  Product Name                    VID     DID     SSVID   SSID
  24  * ---  ------------                    ---     ---     ----    ----
  25  * Dell PERC3/QC                        101E    1960    1028    0471
  26  * Dell PERC3/DC                        101E    1960    1028    0493
  27  * Dell PERC3/SC                        101E    1960    1028    0475
  28  * Dell PERC3/Di                        1028    1960    1028    0123
  29  * Dell PERC4/SC                        1000    1960    1028    0520
  30  * Dell PERC4/DC                        1000    1960    1028    0518
  31  * Dell PERC4/QC                        1000    0407    1028    0531
  32  * Dell PERC4/Di                        1028    000F    1028    014A
  33  * Dell PERC 4e/Si                      1028    0013    1028    016c
  34  * Dell PERC 4e/Di                      1028    0013    1028    016d
  35  * Dell PERC 4e/Di                      1028    0013    1028    016e
  36  * Dell PERC 4e/Di                      1028    0013    1028    016f
  37  * Dell PERC 4e/Di                      1028    0013    1028    0170
  38  * Dell PERC 4e/DC                      1000    0408    1028    0002
  39  * Dell PERC 4e/SC                      1000    0408    1028    0001
  40  *
  41  *
  42  * LSI MegaRAID SCSI 320-0              1000    1960    1000    A520
  43  * LSI MegaRAID SCSI 320-1              1000    1960    1000    0520
  44  * LSI MegaRAID SCSI 320-2              1000    1960    1000    0518
  45  * LSI MegaRAID SCSI 320-0X             1000    0407    1000    0530
  46  * LSI MegaRAID SCSI 320-2X             1000    0407    1000    0532
  47  * LSI MegaRAID SCSI 320-4X             1000    0407    1000    0531
  48  * LSI MegaRAID SCSI 320-1E             1000    0408    1000    0001
  49  * LSI MegaRAID SCSI 320-2E             1000    0408    1000    0002
  50  * LSI MegaRAID SATA 150-4              1000    1960    1000    4523
  51  * LSI MegaRAID SATA 150-6              1000    1960    1000    0523
  52  * LSI MegaRAID SATA 300-4X             1000    0409    1000    3004
  53  * LSI MegaRAID SATA 300-8X             1000    0409    1000    3008
  54  *
  55  * INTEL RAID Controller SRCU42X        1000    0407    8086    0532
  56  * INTEL RAID Controller SRCS16         1000    1960    8086    0523
  57  * INTEL RAID Controller SRCU42E        1000    0408    8086    0002
  58  * INTEL RAID Controller SRCZCRX        1000    0407    8086    0530
  59  * INTEL RAID Controller SRCS28X        1000    0409    8086    3008
  60  * INTEL RAID Controller SROMBU42E      1000    0408    8086    3431
  61  * INTEL RAID Controller SROMBU42E      1000    0408    8086    3499
  62  * INTEL RAID Controller SRCU51L        1000    1960    8086    0520
  63  *
  64  * FSC  MegaRAID PCI Express ROMB       1000    0408    1734    1065
  65  *
  66  * ACER MegaRAID ROMB-2E                1000    0408    1025    004D
  67  *
  68  * NEC  MegaRAID PCI Express ROMB       1000    0408    1033    8287
  69  *
  70  * For history of changes, see Documentation/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 pci_dev *);
  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_sysfs_alloc_resources(adapter_t *);
  95 static void megaraid_sysfs_free_resources(adapter_t *);
  96
  97 static int megaraid_abort_handler(struct scsi_cmnd *);
  98 static int megaraid_reset_handler(struct scsi_cmnd *);
  99
 100 static int mbox_post_sync_cmd(adapter_t *, uint8_t []);
 101 static int mbox_post_sync_cmd_fast(adapter_t *, uint8_t []);
 102 static int megaraid_busywait_mbox(mraid_device_t *);
 103 static int megaraid_mbox_product_info(adapter_t *);
 104 static int megaraid_mbox_extended_cdb(adapter_t *);
 105 static int megaraid_mbox_support_ha(adapter_t *, uint16_t *);
 106 static int megaraid_mbox_support_random_del(adapter_t *);
 107 static int megaraid_mbox_get_max_sg(adapter_t *);
 108 static void megaraid_mbox_enum_raid_scsi(adapter_t *);
 109 static void megaraid_mbox_flush_cache(adapter_t *);
 110
 111 static void megaraid_mbox_display_scb(adapter_t *, scb_t *);
 112 static void megaraid_mbox_setup_device_map(adapter_t *);
 113
 114 static int megaraid_queue_command(struct scsi_cmnd *,
 115                 void (*)(struct scsi_cmnd *));
 116 static scb_t *megaraid_mbox_build_cmd(adapter_t *, struct scsi_cmnd *, int *);
 117 static void megaraid_mbox_runpendq(adapter_t *, scb_t *);
 118 static void megaraid_mbox_prepare_pthru(adapter_t *, scb_t *,
 119                 struct scsi_cmnd *);
 120 static void megaraid_mbox_prepare_epthru(adapter_t *, scb_t *,
 121                 struct scsi_cmnd *);
 122
 123 static irqreturn_t megaraid_isr(int, void *, struct pt_regs *);
 124
 125 static void megaraid_mbox_dpc(unsigned long);
 126
 127 static ssize_t megaraid_sysfs_show_app_hndl(struct class_device *, char *);
 128 static ssize_t megaraid_sysfs_show_ldnum(struct device *, struct device_attribute *attr, char *);
 129
 130 static int megaraid_cmm_register(adapter_t *);
 131 static int megaraid_cmm_unregister(adapter_t *);
 132 static int megaraid_mbox_mm_handler(unsigned long, uioc_t *, uint32_t);
 133 static int megaraid_mbox_mm_command(adapter_t *, uioc_t *);
 134 static void megaraid_mbox_mm_done(adapter_t *, scb_t *);
 135 static int gather_hbainfo(adapter_t *, mraid_hba_info_t *);
 136 static int wait_till_fw_empty(adapter_t *);
 137
 138
 139
 140 MODULE_AUTHOR("sju@lsil.com");
 141 MODULE_DESCRIPTION("LSI Logic MegaRAID Mailbox Driver");
 142 MODULE_LICENSE("GPL");
 143 MODULE_VERSION(MEGARAID_VERSION);
 144
 145 /*
 146  * ### modules parameters for driver ###
 147  */
 148
 149 /**
 150  * Set to enable driver to expose unconfigured disk to kernel
 151  */
 152 static int megaraid_expose_unconf_disks = 0;
 153 module_param_named(unconf_disks, megaraid_expose_unconf_disks, int, 0);
 154 MODULE_PARM_DESC(unconf_disks,
 155         "Set to expose unconfigured disks to kernel (default=0)");
 156
 157 /**
 158  * driver wait time if the adapter's mailbox is busy
 159  */
 160 static unsigned int max_mbox_busy_wait = MBOX_BUSY_WAIT;
 161 module_param_named(busy_wait, max_mbox_busy_wait, int, 0);
 162 MODULE_PARM_DESC(busy_wait,
 163         "Max wait for mailbox in microseconds if busy (default=10)");
 164
 165 /**
 166  * number of sectors per IO command
 167  */
 168 static unsigned int megaraid_max_sectors = MBOX_MAX_SECTORS;
 169 module_param_named(max_sectors, megaraid_max_sectors, int, 0);
 170 MODULE_PARM_DESC(max_sectors,
 171         "Maximum number of sectors per IO command (default=128)");
 172
 173 /**
 174  * number of commands per logical unit
 175  */
 176 static unsigned int megaraid_cmd_per_lun = MBOX_DEF_CMD_PER_LUN;
 177 module_param_named(cmd_per_lun, megaraid_cmd_per_lun, int, 0);
 178 MODULE_PARM_DESC(cmd_per_lun,
 179         "Maximum number of commands per logical unit (default=64)");
 180
 181
 182 /**
 183  * Fast driver load option, skip scanning for physical devices during load.
 184  * This would result in non-disk devices being skipped during driver load
 185  * time. These can be later added though, using /proc/scsi/scsi
 186  */
 187 static unsigned int megaraid_fast_load = 0;
 188 module_param_named(fast_load, megaraid_fast_load, int, 0);
 189 MODULE_PARM_DESC(fast_load,
 190         "Faster loading of the driver, skips physical devices! (default=0)");
 191
 192
 193 /**
 194  * mraid_debug level - threshold for amount of information to be displayed by
 195  * the driver. This level can be changed through modules parameters, ioctl or
 196  * sysfs/proc interface. By default, print the announcement messages only.
 197  */
 198 int mraid_debug_level = CL_ANN;
 199 module_param_named(debug_level, mraid_debug_level, int, 0);
 200 MODULE_PARM_DESC(debug_level, "Debug level for driver (default=0)");
 201
 202 /*
 203  * ### global data ###
 204  */
 205 static uint8_t megaraid_mbox_version[8] =
 206         { 0x02, 0x20, 0x04, 0x06, 3, 7, 20, 5 };
 207
 208
 209 /*
 210  * PCI table for all supported controllers.
 211  */
 212 static struct pci_device_id pci_id_table_g[] =  {
 213         {
 214                 PCI_VENDOR_ID_DELL,
 215                 PCI_DEVICE_ID_PERC4_DI_DISCOVERY,
 216                 PCI_VENDOR_ID_DELL,
 217                 PCI_SUBSYS_ID_PERC4_DI_DISCOVERY,
 218         },
 219         {
 220                 PCI_VENDOR_ID_LSI_LOGIC,
 221                 PCI_DEVICE_ID_PERC4_SC,
 222                 PCI_VENDOR_ID_DELL,
 223                 PCI_SUBSYS_ID_PERC4_SC,
 224         },
 225         {
 226                 PCI_VENDOR_ID_LSI_LOGIC,
 227                 PCI_DEVICE_ID_PERC4_DC,
 228                 PCI_VENDOR_ID_DELL,
 229                 PCI_SUBSYS_ID_PERC4_DC,
 230         },
 231         {
 232                 PCI_VENDOR_ID_LSI_LOGIC,
 233                 PCI_DEVICE_ID_VERDE,
 234                 PCI_ANY_ID,
 235                 PCI_ANY_ID,
 236         },
 237         {
 238                 PCI_VENDOR_ID_DELL,
 239                 PCI_DEVICE_ID_PERC4_DI_EVERGLADES,
 240                 PCI_VENDOR_ID_DELL,
 241                 PCI_SUBSYS_ID_PERC4_DI_EVERGLADES,
 242         },
 243         {
 244                 PCI_VENDOR_ID_DELL,
 245                 PCI_DEVICE_ID_PERC4E_SI_BIGBEND,
 246                 PCI_VENDOR_ID_DELL,
 247                 PCI_SUBSYS_ID_PERC4E_SI_BIGBEND,
 248         },
 249         {
 250                 PCI_VENDOR_ID_DELL,
 251                 PCI_DEVICE_ID_PERC4E_DI_KOBUK,
 252                 PCI_VENDOR_ID_DELL,
 253                 PCI_SUBSYS_ID_PERC4E_DI_KOBUK,
 254         },
 255         {
 256                 PCI_VENDOR_ID_DELL,
 257                 PCI_DEVICE_ID_PERC4E_DI_CORVETTE,
 258                 PCI_VENDOR_ID_DELL,
 259                 PCI_SUBSYS_ID_PERC4E_DI_CORVETTE,
 260         },
 261         {
 262                 PCI_VENDOR_ID_DELL,
 263                 PCI_DEVICE_ID_PERC4E_DI_EXPEDITION,
 264                 PCI_VENDOR_ID_DELL,
 265                 PCI_SUBSYS_ID_PERC4E_DI_EXPEDITION,
 266         },
 267         {
 268                 PCI_VENDOR_ID_DELL,
 269                 PCI_DEVICE_ID_PERC4E_DI_GUADALUPE,
 270                 PCI_VENDOR_ID_DELL,
 271                 PCI_SUBSYS_ID_PERC4E_DI_GUADALUPE,
 272         },
 273         {
 274                 PCI_VENDOR_ID_LSI_LOGIC,
 275                 PCI_DEVICE_ID_DOBSON,
 276                 PCI_ANY_ID,
 277                 PCI_ANY_ID,
 278         },
 279         {
 280                 PCI_VENDOR_ID_AMI,
 281                 PCI_DEVICE_ID_AMI_MEGARAID3,
 282                 PCI_ANY_ID,
 283                 PCI_ANY_ID,
 284         },
 285         {
 286                 PCI_VENDOR_ID_LSI_LOGIC,
 287                 PCI_DEVICE_ID_AMI_MEGARAID3,
 288                 PCI_ANY_ID,
 289                 PCI_ANY_ID,
 290         },
 291         {
 292                 PCI_VENDOR_ID_LSI_LOGIC,
 293                 PCI_DEVICE_ID_LINDSAY,
 294                 PCI_ANY_ID,
 295                 PCI_ANY_ID,
 296         },
 297         {0}     /* Terminating entry */
 298 };
 299 MODULE_DEVICE_TABLE(pci, pci_id_table_g);
 300
 301
 302 static struct pci_driver megaraid_pci_driver_g = {
 303         .name           = "megaraid",
 304         .id_table       = pci_id_table_g,
 305         .probe          = megaraid_probe_one,
 306         .remove         = __devexit_p(megaraid_detach_one),
 307         .shutdown       = megaraid_mbox_shutdown,
 308 };
 309
 310
 311
 312 // definitions for the device attributes for exporting logical drive number
 313 // for a scsi address (Host, Channel, Id, Lun)
 314
 315 CLASS_DEVICE_ATTR(megaraid_mbox_app_hndl, S_IRUSR, megaraid_sysfs_show_app_hndl,
 316                 NULL);
 317
 318 // Host template initializer for megaraid mbox sysfs device attributes
 319 static struct class_device_attribute *megaraid_shost_attrs[] = {
 320         &class_device_attr_megaraid_mbox_app_hndl,
 321         NULL,
 322 };
 323
 324
 325 DEVICE_ATTR(megaraid_mbox_ld, S_IRUSR, megaraid_sysfs_show_ldnum, NULL);
 326
 327 // Host template initializer for megaraid mbox sysfs device attributes
 328 static struct device_attribute *megaraid_sdev_attrs[] = {
 329         &dev_attr_megaraid_mbox_ld,
 330         NULL,
 331 };
 332
 333
 334 /*
 335  * Scsi host template for megaraid unified driver
 336  */
 337 static struct scsi_host_template megaraid_template_g = {
 338         .module                         = THIS_MODULE,
 339         .name                           = "LSI Logic MegaRAID driver",
 340         .proc_name                      = "megaraid",
 341         .queuecommand                   = megaraid_queue_command,
 342         .eh_abort_handler               = megaraid_abort_handler,
 343         .eh_device_reset_handler        = megaraid_reset_handler,
 344         .eh_bus_reset_handler           = megaraid_reset_handler,
 345         .eh_host_reset_handler          = megaraid_reset_handler,
 346         .use_clustering                 = ENABLE_CLUSTERING,
 347         .sdev_attrs                     = megaraid_sdev_attrs,
 348         .shost_attrs                    = megaraid_shost_attrs,
 349 };
 350
 351
 352 /**
 353  * megaraid_init - module load hook
 354  *
 355  * We register ourselves as hotplug enabled module and let PCI subsystem
 356  * discover our adaters
 357  **/
 358 static int __init
 359 megaraid_init(void)
 360 {
 361         int     rval;
 362
 363         // Announce the driver version
 364         con_log(CL_ANN, (KERN_INFO "megaraid: %s %s\n", MEGARAID_VERSION,
 365                 MEGARAID_EXT_VERSION));
 366
 367         // check validity of module parameters
 368         if (megaraid_cmd_per_lun > MBOX_MAX_SCSI_CMDS) {
 369
 370                 con_log(CL_ANN, (KERN_WARNING
 371                         "megaraid mailbox: max commands per lun reset to %d\n",
 372                         MBOX_MAX_SCSI_CMDS));
 373
 374                 megaraid_cmd_per_lun = MBOX_MAX_SCSI_CMDS;
 375         }
 376
 377
 378         // register as a PCI hot-plug driver module
 379         rval = pci_register_driver(&megaraid_pci_driver_g);
 380         if (rval < 0) {
 381                 con_log(CL_ANN, (KERN_WARNING
 382                         "megaraid: could not register hotplug support.\n"));
 383         }
 384
 385         return rval;
 386 }
 387
 388
 389 /**
 390  * megaraid_exit - driver unload entry point
 391  *
 392  * We simply unwrap the megaraid_init routine here
 393  */
 394 static void __exit
 395 megaraid_exit(void)
 396 {
 397         con_log(CL_DLEVEL1, (KERN_NOTICE "megaraid: unloading framework\n"));
 398
 399         // unregister as PCI hotplug driver
 400         pci_unregister_driver(&megaraid_pci_driver_g);
 401
 402         return;
 403 }
 404
 405
 406 /**
 407  * megaraid_probe_one - PCI hotplug entry point
 408  * @param pdev  : handle to this controller's PCI configuration space
 409  * @param id    : pci device id of the class of controllers
 410  *
 411  * This routine should be called whenever a new adapter is detected by the
 412  * PCI hotplug susbsytem.
 413  **/
 414 static int __devinit
 415 megaraid_probe_one(struct pci_dev *pdev, const struct pci_device_id *id)
 416 {
 417         adapter_t       *adapter;
 418
 419
 420         // detected a new controller
 421         con_log(CL_ANN, (KERN_INFO
 422                 "megaraid: probe new device %#4.04x:%#4.04x:%#4.04x:%#4.04x: ",
 423                 pdev->vendor, pdev->device, pdev->subsystem_vendor,
 424                 pdev->subsystem_device));
 425
 426         con_log(CL_ANN, ("bus %d:slot %d:func %d\n", pdev->bus->number,
 427                 PCI_SLOT(pdev->devfn), PCI_FUNC(pdev->devfn)));
 428
 429         if (pci_enable_device(pdev)) {
 430                 con_log(CL_ANN, (KERN_WARNING
 431                                 "megaraid: pci_enable_device failed\n"));
 432
 433                 return -ENODEV;
 434         }
 435
 436         // Enable bus-mastering on this controller
 437         pci_set_master(pdev);
 438
 439         // Allocate the per driver initialization structure
 440         adapter = kmalloc(sizeof(adapter_t), GFP_KERNEL);
 441
 442         if (adapter == NULL) {
 443                 con_log(CL_ANN, (KERN_WARNING
 444                 "megaraid: out of memory, %s %d.\n", __FUNCTION__, __LINE__));
 445
 446                 goto out_probe_one;
 447         }
 448         memset(adapter, 0, sizeof(adapter_t));
 449
 450
 451         // set up PCI related soft state and other pre-known parameters
 452         adapter->unique_id      = pdev->bus->number << 8 | pdev->devfn;
 453         adapter->irq            = pdev->irq;
 454         adapter->pdev           = pdev;
 455
 456         atomic_set(&adapter->being_detached, 0);
 457
 458         // Setup the default DMA mask. This would be changed later on
 459         // depending on hardware capabilities
 460         if (pci_set_dma_mask(adapter->pdev, DMA_32BIT_MASK) != 0) {
 461
 462                 con_log(CL_ANN, (KERN_WARNING
 463                         "megaraid: pci_set_dma_mask failed:%d\n", __LINE__));
 464
 465                 goto out_free_adapter;
 466         }
 467
 468
 469         // Initialize the synchronization lock for kernel and LLD
 470         spin_lock_init(&adapter->lock);
 471
 472         // Initialize the command queues: the list of free SCBs and the list
 473         // of pending SCBs.
 474         INIT_LIST_HEAD(&adapter->kscb_pool);
 475         spin_lock_init(SCSI_FREE_LIST_LOCK(adapter));
 476
 477         INIT_LIST_HEAD(&adapter->pend_list);
 478         spin_lock_init(PENDING_LIST_LOCK(adapter));
 479
 480         INIT_LIST_HEAD(&adapter->completed_list);
 481         spin_lock_init(COMPLETED_LIST_LOCK(adapter));
 482
 483
 484         // Start the mailbox based controller
 485         if (megaraid_init_mbox(adapter) != 0) {
 486                 con_log(CL_ANN, (KERN_WARNING
 487                         "megaraid: maibox adapter did not initialize\n"));
 488
 489                 goto out_free_adapter;
 490         }
 491
 492         // Register with LSI Common Management Module
 493         if (megaraid_cmm_register(adapter) != 0) {
 494
 495                 con_log(CL_ANN, (KERN_WARNING
 496                 "megaraid: could not register with management module\n"));
 497
 498                 goto out_fini_mbox;
 499         }
 500
 501         // setup adapter handle in PCI soft state
 502         pci_set_drvdata(pdev, adapter);
 503
 504         // attach with scsi mid-layer
 505         if (megaraid_io_attach(adapter) != 0) {
 506
 507                 con_log(CL_ANN, (KERN_WARNING "megaraid: io attach failed\n"));
 508
 509                 goto out_cmm_unreg;
 510         }
 511
 512         return 0;
 513
 514 out_cmm_unreg:
 515         pci_set_drvdata(pdev, NULL);
 516         megaraid_cmm_unregister(adapter);
 517 out_fini_mbox:
 518         megaraid_fini_mbox(adapter);
 519 out_free_adapter:
 520         kfree(adapter);
 521 out_probe_one:
 522         pci_disable_device(pdev);
 523
 524         return -ENODEV;
 525 }
 526
 527
 528 /**
 529  * megaraid_detach_one - release the framework resources and call LLD release
 530  * routine
 531  * @param pdev  : handle for our PCI cofiguration space
 532  *
 533  * This routine is called during driver unload. We free all the allocated
 534  * resources and call the corresponding LLD so that it can also release all
 535  * its resources.
 536  *
 537  * This routine is also called from the PCI hotplug system
 538  **/
 539 static void
 540 megaraid_detach_one(struct pci_dev *pdev)
 541 {
 542         adapter_t               *adapter;
 543         struct Scsi_Host        *host;
 544
 545
 546         // Start a rollback on this adapter
 547         adapter = pci_get_drvdata(pdev);
 548
 549         if (!adapter) {
 550                 con_log(CL_ANN, (KERN_CRIT
 551                 "megaraid: Invalid detach on %#4.04x:%#4.04x:%#4.04x:%#4.04x\n",
 552                         pdev->vendor, pdev->device, pdev->subsystem_vendor,
 553                         pdev->subsystem_device));
 554
 555                 return;
 556         }
 557         else {
 558                 con_log(CL_ANN, (KERN_NOTICE
 559                 "megaraid: detaching device %#4.04x:%#4.04x:%#4.04x:%#4.04x\n",
 560                         pdev->vendor, pdev->device, pdev->subsystem_vendor,
 561                         pdev->subsystem_device));
 562         }
 563
 564
 565         host = adapter->host;
 566
 567         // do not allow any more requests from the management module for this
 568         // adapter.
 569         // FIXME: How do we account for the request which might still be
 570         // pending with us?
 571         atomic_set(&adapter->being_detached, 1);
 572
 573         // detach from the IO sub-system
 574         megaraid_io_detach(adapter);
 575
 576         // reset the device state in the PCI structure. We check this
 577         // condition when we enter here. If the device state is NULL,
 578         // that would mean the device has already been removed
 579         pci_set_drvdata(pdev, NULL);
 580
 581         // Unregister from common management module
 582         //
 583         // FIXME: this must return success or failure for conditions if there
 584         // is a command pending with LLD or not.
 585         megaraid_cmm_unregister(adapter);
 586
 587         // finalize the mailbox based controller and release all resources
 588         megaraid_fini_mbox(adapter);
 589
 590         kfree(adapter);
 591
 592         scsi_host_put(host);
 593
 594         pci_disable_device(pdev);
 595
 596         return;
 597 }
 598
 599
 600 /**
 601  * megaraid_mbox_shutdown - PCI shutdown for megaraid HBA
 602  * @param device        : generice driver model device
 603  *
 604  * Shutdown notification, perform flush cache
 605  */
 606 static void
 607 megaraid_mbox_shutdown(struct pci_dev *pdev)
 608 {
 609         adapter_t               *adapter = pci_get_drvdata(pdev);
 610         static int              counter;
 611
 612         if (!adapter) {
 613                 con_log(CL_ANN, (KERN_WARNING
 614                         "megaraid: null device in shutdown\n"));
 615                 return;
 616         }
 617
 618         // flush caches now
 619         con_log(CL_ANN, (KERN_INFO "megaraid: flushing adapter %d...",
 620                 counter++));
 621
 622         megaraid_mbox_flush_cache(adapter);
 623
 624         con_log(CL_ANN, ("done\n"));
 625 }
 626
 627
 628 /**
 629  * megaraid_io_attach - attach a device with the IO subsystem
 630  * @param adapter       : controller's soft state
 631  *
 632  * Attach this device with the IO subsystem
 633  **/
 634 static int
 635 megaraid_io_attach(adapter_t *adapter)
 636 {
 637         struct Scsi_Host        *host;
 638
 639         // Initialize SCSI Host structure
 640         host = scsi_host_alloc(&megaraid_template_g, 8);
 641         if (!host) {
 642                 con_log(CL_ANN, (KERN_WARNING
 643                         "megaraid mbox: scsi_register failed\n"));
 644
 645                 return -1;
 646         }
 647
 648         SCSIHOST2ADAP(host)     = (caddr_t)adapter;
 649         adapter->host           = host;
 650
 651         host->irq               = adapter->irq;
 652         host->unique_id         = adapter->unique_id;
 653         host->can_queue         = adapter->max_cmds;
 654         host->this_id           = adapter->init_id;
 655         host->sg_tablesize      = adapter->sglen;
 656         host->max_sectors       = adapter->max_sectors;
 657         host->cmd_per_lun       = adapter->cmd_per_lun;
 658         host->max_channel       = adapter->max_channel;
 659         host->max_id            = adapter->max_target;
 660         host->max_lun           = adapter->max_lun;
 661
 662
 663         // notify mid-layer about the new controller
 664         if (scsi_add_host(host, &adapter->pdev->dev)) {
 665
 666                 con_log(CL_ANN, (KERN_WARNING
 667                         "megaraid mbox: scsi_add_host failed\n"));
 668
 669                 scsi_host_put(host);
 670
 671                 return -1;
 672         }
 673
 674         scsi_scan_host(host);
 675
 676         return 0;
 677 }
 678
 679
 680 /**
 681  * megaraid_io_detach - detach a device from the IO subsystem
 682  * @param adapter       : controller's soft state
 683  *
 684  * Detach this device from the IO subsystem
 685  **/
 686 static void
 687 megaraid_io_detach(adapter_t *adapter)
 688 {
 689         struct Scsi_Host        *host;
 690
 691         con_log(CL_DLEVEL1, (KERN_INFO "megaraid: io detach\n"));
 692
 693         host = adapter->host;
 694
 695         scsi_remove_host(host);
 696
 697         return;
 698 }
 699
 700
 701 /*
 702  * START: Mailbox Low Level Driver
 703  *
 704  * This is section specific to the single mailbox based controllers
 705  */
 706
 707 /**
 708  * megaraid_init_mbox - initialize controller
 709  * @param adapter       - our soft state
 710  *
 711  * . Allocate 16-byte aligned mailbox memory for firmware handshake
 712  * . Allocate controller's memory resources
 713  * . Find out all initialization data
 714  * . Allocate memory required for all the commands
 715  * . Use internal library of FW routines, build up complete soft state
 716  */
 717 static int __init
 718 megaraid_init_mbox(adapter_t *adapter)
 719 {
 720         struct pci_dev          *pdev;
 721         mraid_device_t          *raid_dev;
 722         int                     i;
 723
 724
 725         adapter->ito    = MBOX_TIMEOUT;
 726         pdev            = adapter->pdev;
 727
 728         /*
 729          * Allocate and initialize the init data structure for mailbox
 730          * controllers
 731          */
 732         raid_dev = kmalloc(sizeof(mraid_device_t), GFP_KERNEL);
 733         if (raid_dev == NULL) return -1;
 734
 735         memset(raid_dev, 0, sizeof(mraid_device_t));
 736
 737         /*
 738          * Attach the adapter soft state to raid device soft state
 739          */
 740         adapter->raid_device    = (caddr_t)raid_dev;
 741         raid_dev->fast_load     = megaraid_fast_load;
 742
 743
 744         // our baseport
 745         raid_dev->baseport = pci_resource_start(pdev, 0);
 746
 747         if (pci_request_regions(pdev, "MegaRAID: LSI Logic Corporation") != 0) {
 748
 749                 con_log(CL_ANN, (KERN_WARNING
 750                                 "megaraid: mem region busy\n"));
 751
 752                 goto out_free_raid_dev;
 753         }
 754
 755         raid_dev->baseaddr = ioremap_nocache(raid_dev->baseport, 128);
 756
 757         if (!raid_dev->baseaddr) {
 758
 759                 con_log(CL_ANN, (KERN_WARNING
 760                         "megaraid: could not map hba memory\n") );
 761
 762                 goto out_release_regions;
 763         }
 764
 765         //
 766         // Setup the rest of the soft state using the library of FW routines
 767         //
 768
 769         // request IRQ and register the interrupt service routine
 770         if (request_irq(adapter->irq, megaraid_isr, SA_SHIRQ, "megaraid",
 771                 adapter)) {
 772
 773                 con_log(CL_ANN, (KERN_WARNING
 774                         "megaraid: Couldn't register IRQ %d!\n", adapter->irq));
 775
 776                 goto out_iounmap;
 777         }
 778
 779
 780         // initialize the mutual exclusion lock for the mailbox
 781         spin_lock_init(&raid_dev->mailbox_lock);
 782
 783         // allocate memory required for commands
 784         if (megaraid_alloc_cmd_packets(adapter) != 0) {
 785                 goto out_free_irq;
 786         }
 787
 788         // Product info
 789         if (megaraid_mbox_product_info(adapter) != 0) {
 790                 goto out_alloc_cmds;
 791         }
 792
 793         // Do we support extended CDBs
 794         adapter->max_cdb_sz = 10;
 795         if (megaraid_mbox_extended_cdb(adapter) == 0) {
 796                 adapter->max_cdb_sz = 16;
 797         }
 798
 799         /*
 800          * Do we support cluster environment, if we do, what is the initiator
 801          * id.
 802          * NOTE: In a non-cluster aware firmware environment, the LLD should
 803          * return 7 as initiator id.
 804          */
 805         adapter->ha             = 0;
 806         adapter->init_id        = -1;
 807         if (megaraid_mbox_support_ha(adapter, &adapter->init_id) == 0) {
 808                 adapter->ha = 1;
 809         }
 810
 811         /*
 812          * Prepare the device ids array to have the mapping between the kernel
 813          * device address and megaraid device address.
 814          * We export the physical devices on their actual addresses. The
 815          * logical drives are exported on a virtual SCSI channel
 816          */
 817         megaraid_mbox_setup_device_map(adapter);
 818
 819         // If the firmware supports random deletion, update the device id map
 820         if (megaraid_mbox_support_random_del(adapter)) {
 821
 822                 // Change the logical drives numbers in device_ids array one
 823                 // slot in device_ids is reserved for target id, that's why
 824                 // "<=" below
 825                 for (i = 0; i <= MAX_LOGICAL_DRIVES_40LD; i++) {
 826                         adapter->device_ids[adapter->max_channel][i] += 0x80;
 827                 }
 828                 adapter->device_ids[adapter->max_channel][adapter->init_id] =
 829                         0xFF;
 830
 831                 raid_dev->random_del_supported = 1;
 832         }
 833
 834         /*
 835          * find out the maximum number of scatter-gather elements supported by
 836          * this firmware
 837          */
 838         adapter->sglen = megaraid_mbox_get_max_sg(adapter);
 839
 840         // enumerate RAID and SCSI channels so that all devices on SCSI
 841         // channels can later be exported, including disk devices
 842         megaraid_mbox_enum_raid_scsi(adapter);
 843
 844         /*
 845          * Other parameters required by upper layer
 846          *
 847          * maximum number of sectors per IO command
 848          */
 849         adapter->max_sectors = megaraid_max_sectors;
 850
 851         /*
 852          * number of queued commands per LUN.
 853          */
 854         adapter->cmd_per_lun = megaraid_cmd_per_lun;
 855
 856         /*
 857          * Allocate resources required to issue FW calls, when sysfs is
 858          * accessed
 859          */
 860         if (megaraid_sysfs_alloc_resources(adapter) != 0) {
 861                 goto out_alloc_cmds;
 862         }
 863
 864         // Set the DMA mask to 64-bit. All supported controllers as capable of
 865         // DMA in this range
 866         if (pci_set_dma_mask(adapter->pdev, DMA_64BIT_MASK) != 0) {
 867
 868                 con_log(CL_ANN, (KERN_WARNING
 869                         "megaraid: could not set DMA mask for 64-bit.\n"));
 870
 871                 goto out_free_sysfs_res;
 872         }
 873
 874         // setup tasklet for DPC
 875         tasklet_init(&adapter->dpc_h, megaraid_mbox_dpc,
 876                         (unsigned long)adapter);
 877
 878         con_log(CL_DLEVEL1, (KERN_INFO
 879                 "megaraid mbox hba successfully initialized\n"));
 880
 881         return 0;
 882
 883 out_free_sysfs_res:
 884         megaraid_sysfs_free_resources(adapter);
 885 out_alloc_cmds:
 886         megaraid_free_cmd_packets(adapter);
 887 out_free_irq:
 888         free_irq(adapter->irq, adapter);
 889 out_iounmap:
 890         iounmap(raid_dev->baseaddr);
 891 out_release_regions:
 892         pci_release_regions(pdev);
 893 out_free_raid_dev:
 894         kfree(raid_dev);
 895
 896         return -1;
 897 }
 898
 899
 900 /**
 901  * megaraid_fini_mbox - undo controller initialization
 902  * @param adapter       : our soft state
 903  */
 904 static void
 905 megaraid_fini_mbox(adapter_t *adapter)
 906 {
 907         mraid_device_t *raid_dev = ADAP2RAIDDEV(adapter);
 908
 909         // flush all caches
 910         megaraid_mbox_flush_cache(adapter);
 911
 912         tasklet_kill(&adapter->dpc_h);
 913
 914         megaraid_sysfs_free_resources(adapter);
 915
 916         megaraid_free_cmd_packets(adapter);
 917
 918         free_irq(adapter->irq, adapter);
 919
 920         iounmap(raid_dev->baseaddr);
 921
 922         pci_release_regions(adapter->pdev);
 923
 924         kfree(raid_dev);
 925
 926         return;
 927 }
 928
 929
 930 /**
 931  * megaraid_alloc_cmd_packets - allocate shared mailbox
 932  * @param adapter       : soft state of the raid controller
 933  *
 934  * Allocate and align the shared mailbox. This maibox is used to issue
 935  * all the commands. For IO based controllers, the mailbox is also regsitered
 936  * with the FW. Allocate memory for all commands as well.
 937  * This is our big allocator
 938  */
 939 static int
 940 megaraid_alloc_cmd_packets(adapter_t *adapter)
 941 {
 942         mraid_device_t          *raid_dev = ADAP2RAIDDEV(adapter);
 943         struct pci_dev          *pdev;
 944         unsigned long           align;
 945         scb_t                   *scb;
 946         mbox_ccb_t              *ccb;
 947         struct mraid_pci_blk    *epthru_pci_blk;
 948         struct mraid_pci_blk    *sg_pci_blk;
 949         struct mraid_pci_blk    *mbox_pci_blk;
 950         int                     i;
 951
 952         pdev = adapter->pdev;
 953
 954         /*
 955          * Setup the mailbox
 956          * Allocate the common 16-byte aligned memory for the handshake
 957          * mailbox.
 958          */
 959         raid_dev->una_mbox64 = pci_alloc_consistent(adapter->pdev,
 960                         sizeof(mbox64_t), &raid_dev->una_mbox64_dma);
 961
 962         if (!raid_dev->una_mbox64) {
 963                 con_log(CL_ANN, (KERN_WARNING
 964                         "megaraid: out of memory, %s %d\n", __FUNCTION__,
 965                         __LINE__));
 966                 return -1;
 967         }
 968         memset(raid_dev->una_mbox64, 0, sizeof(mbox64_t));
 969
 970         /*
 971          * Align the mailbox at 16-byte boundary
 972          */
 973         raid_dev->mbox  = &raid_dev->una_mbox64->mbox32;
 974
 975         raid_dev->mbox  = (mbox_t *)((((unsigned long)raid_dev->mbox) + 15) &
 976                                 (~0UL ^ 0xFUL));
 977
 978         raid_dev->mbox64 = (mbox64_t *)(((unsigned long)raid_dev->mbox) - 8);
 979
 980         align = ((void *)raid_dev->mbox -
 981                         ((void *)&raid_dev->una_mbox64->mbox32));
 982
 983         raid_dev->mbox_dma = (unsigned long)raid_dev->una_mbox64_dma + 8 +
 984                         align;
 985
 986         // Allocate memory for commands issued internally
 987         adapter->ibuf = pci_alloc_consistent(pdev, MBOX_IBUF_SIZE,
 988                                 &adapter->ibuf_dma_h);
 989         if (!adapter->ibuf) {
 990
 991                 con_log(CL_ANN, (KERN_WARNING
 992                         "megaraid: out of memory, %s %d\n", __FUNCTION__,
 993                         __LINE__));
 994
 995                 goto out_free_common_mbox;
 996         }
 997         memset(adapter->ibuf, 0, MBOX_IBUF_SIZE);
 998
 999         // Allocate memory for our SCSI Command Blocks and their associated
1000         // memory
1001
1002         /*
1003          * Allocate memory for the base list of scb. Later allocate memory for
1004          * CCBs and embedded components of each CCB and point the pointers in
1005          * scb to the allocated components
1006          * NOTE: The code to allocate SCB will be duplicated in all the LLD
1007          * since the calling routine does not yet know the number of available
1008          * commands.
1009          */
1010         adapter->kscb_list = kmalloc(sizeof(scb_t) * MBOX_MAX_SCSI_CMDS,
1011                         GFP_KERNEL);
1012
1013         if (adapter->kscb_list == NULL) {
1014                 con_log(CL_ANN, (KERN_WARNING
1015                         "megaraid: out of memory, %s %d\n", __FUNCTION__,
1016                         __LINE__));
1017                 goto out_free_ibuf;
1018         }
1019         memset(adapter->kscb_list, 0, sizeof(scb_t) * MBOX_MAX_SCSI_CMDS);
1020
1021         // memory allocation for our command packets
1022         if (megaraid_mbox_setup_dma_pools(adapter) != 0) {
1023                 con_log(CL_ANN, (KERN_WARNING
1024                         "megaraid: out of memory, %s %d\n", __FUNCTION__,
1025                         __LINE__));
1026                 goto out_free_scb_list;
1027         }
1028
1029         // Adjust the scb pointers and link in the free pool
1030         epthru_pci_blk  = raid_dev->epthru_pool;
1031         sg_pci_blk      = raid_dev->sg_pool;
1032         mbox_pci_blk    = raid_dev->mbox_pool;
1033
1034         for (i = 0; i < MBOX_MAX_SCSI_CMDS; i++) {
1035                 scb                     = adapter->kscb_list + i;
1036                 ccb                     = raid_dev->ccb_list + i;
1037
1038                 ccb->mbox       = (mbox_t *)(mbox_pci_blk[i].vaddr + 16);
1039                 ccb->raw_mbox   = (uint8_t *)ccb->mbox;
1040                 ccb->mbox64     = (mbox64_t *)(mbox_pci_blk[i].vaddr + 8);
1041                 ccb->mbox_dma_h = (unsigned long)mbox_pci_blk[i].dma_addr + 16;
1042
1043                 // make sure the mailbox is aligned properly
1044                 if (ccb->mbox_dma_h & 0x0F) {
1045                         con_log(CL_ANN, (KERN_CRIT
1046                                 "megaraid mbox: not aligned on 16-bytes\n"));
1047
1048                         goto out_teardown_dma_pools;
1049                 }
1050
1051                 ccb->epthru             = (mraid_epassthru_t *)
1052                                                 epthru_pci_blk[i].vaddr;
1053                 ccb->epthru_dma_h       = epthru_pci_blk[i].dma_addr;
1054                 ccb->pthru              = (mraid_passthru_t *)ccb->epthru;
1055                 ccb->pthru_dma_h        = ccb->epthru_dma_h;
1056
1057
1058                 ccb->sgl64              = (mbox_sgl64 *)sg_pci_blk[i].vaddr;
1059                 ccb->sgl_dma_h          = sg_pci_blk[i].dma_addr;
1060                 ccb->sgl32              = (mbox_sgl32 *)ccb->sgl64;
1061
1062                 scb->ccb                = (caddr_t)ccb;
1063                 scb->gp                 = 0;
1064
1065                 scb->sno                = i;    // command index
1066
1067                 scb->scp                = NULL;
1068                 scb->state              = SCB_FREE;
1069                 scb->dma_direction      = PCI_DMA_NONE;
1070                 scb->dma_type           = MRAID_DMA_NONE;
1071                 scb->dev_channel        = -1;
1072                 scb->dev_target         = -1;
1073
1074                 // put scb in the free pool
1075                 list_add_tail(&scb->list, &adapter->kscb_pool);
1076         }
1077
1078         return 0;
1079
1080 out_teardown_dma_pools:
1081         megaraid_mbox_teardown_dma_pools(adapter);
1082 out_free_scb_list:
1083         kfree(adapter->kscb_list);
1084 out_free_ibuf:
1085         pci_free_consistent(pdev, MBOX_IBUF_SIZE, (void *)adapter->ibuf,
1086                 adapter->ibuf_dma_h);
1087 out_free_common_mbox:
1088         pci_free_consistent(adapter->pdev, sizeof(mbox64_t),
1089                 (caddr_t)raid_dev->una_mbox64, raid_dev->una_mbox64_dma);
1090
1091         return -1;
1092 }
1093
1094
1095 /**
1096  * megaraid_free_cmd_packets - free memory
1097  * @param adapter       : soft state of the raid controller
1098  *
1099  * Release memory resources allocated for commands
1100  */
1101 static void
1102 megaraid_free_cmd_packets(adapter_t *adapter)
1103 {
1104         mraid_device_t *raid_dev = ADAP2RAIDDEV(adapter);
1105
1106         megaraid_mbox_teardown_dma_pools(adapter);
1107
1108         kfree(adapter->kscb_list);
1109
1110         pci_free_consistent(adapter->pdev, MBOX_IBUF_SIZE,
1111                 (void *)adapter->ibuf, adapter->ibuf_dma_h);
1112
1113         pci_free_consistent(adapter->pdev, sizeof(mbox64_t),
1114                 (caddr_t)raid_dev->una_mbox64, raid_dev->una_mbox64_dma);
1115         return;
1116 }
1117
1118
1119 /**
1120  * megaraid_mbox_setup_dma_pools - setup dma pool for command packets
1121  * @param adapter       : HBA soft state
1122  *
1123  * setup the dma pools for mailbox, passthru and extended passthru structures,
1124  * and scatter-gather lists
1125  */
1126 static int
1127 megaraid_mbox_setup_dma_pools(adapter_t *adapter)
1128 {
1129         mraid_device_t          *raid_dev = ADAP2RAIDDEV(adapter);
1130         struct mraid_pci_blk    *epthru_pci_blk;
1131         struct mraid_pci_blk    *sg_pci_blk;
1132         struct mraid_pci_blk    *mbox_pci_blk;
1133         int                     i;
1134
1135
1136
1137         // Allocate memory for 16-bytes aligned mailboxes
1138         raid_dev->mbox_pool_handle = pci_pool_create("megaraid mbox pool",
1139                                                 adapter->pdev,
1140                                                 sizeof(mbox64_t) + 16,
1141                                                 16, 0);
1142
1143         if (raid_dev->mbox_pool_handle == NULL) {
1144                 goto fail_setup_dma_pool;
1145         }
1146
1147         mbox_pci_blk = raid_dev->mbox_pool;
1148         for (i = 0; i < MBOX_MAX_SCSI_CMDS; i++) {
1149                 mbox_pci_blk[i].vaddr = pci_pool_alloc(
1150                                                 raid_dev->mbox_pool_handle,
1151                                                 GFP_KERNEL,
1152                                                 &mbox_pci_blk[i].dma_addr);
1153                 if (!mbox_pci_blk[i].vaddr) {
1154                         goto fail_setup_dma_pool;
1155                 }
1156         }
1157
1158         /*
1159          * Allocate memory for each embedded passthru strucuture pointer
1160          * Request for a 128 bytes aligned structure for each passthru command
1161          * structure
1162          * Since passthru and extended passthru commands are exclusive, they
1163          * share common memory pool. Passthru structures piggyback on memory
1164          * allocted to extended passthru since passthru is smaller of the two
1165          */
1166         raid_dev->epthru_pool_handle = pci_pool_create("megaraid mbox pthru",
1167                         adapter->pdev, sizeof(mraid_epassthru_t), 128, 0);
1168
1169         if (raid_dev->epthru_pool_handle == NULL) {
1170                 goto fail_setup_dma_pool;
1171         }
1172
1173         epthru_pci_blk = raid_dev->epthru_pool;
1174         for (i = 0; i < MBOX_MAX_SCSI_CMDS; i++) {
1175                 epthru_pci_blk[i].vaddr = pci_pool_alloc(
1176                                                 raid_dev->epthru_pool_handle,
1177                                                 GFP_KERNEL,
1178                                                 &epthru_pci_blk[i].dma_addr);
1179                 if (!epthru_pci_blk[i].vaddr) {
1180                         goto fail_setup_dma_pool;
1181                 }
1182         }
1183
1184
1185         // Allocate memory for each scatter-gather list. Request for 512 bytes
1186         // alignment for each sg list
1187         raid_dev->sg_pool_handle = pci_pool_create("megaraid mbox sg",
1188                                         adapter->pdev,
1189                                         sizeof(mbox_sgl64) * MBOX_MAX_SG_SIZE,
1190                                         512, 0);
1191
1192         if (raid_dev->sg_pool_handle == NULL) {
1193                 goto fail_setup_dma_pool;
1194         }
1195
1196         sg_pci_blk = raid_dev->sg_pool;
1197         for (i = 0; i < MBOX_MAX_SCSI_CMDS; i++) {
1198                 sg_pci_blk[i].vaddr = pci_pool_alloc(
1199                                                 raid_dev->sg_pool_handle,
1200                                                 GFP_KERNEL,
1201                                                 &sg_pci_blk[i].dma_addr);
1202                 if (!sg_pci_blk[i].vaddr) {
1203                         goto fail_setup_dma_pool;
1204                 }
1205         }
1206
1207         return 0;
1208
1209 fail_setup_dma_pool:
1210         megaraid_mbox_teardown_dma_pools(adapter);
1211         return -1;
1212 }
1213
1214
1215 /**
1216  * megaraid_mbox_teardown_dma_pools - teardown dma pools for command packets
1217  * @param adapter       : HBA soft state
1218  *
1219  * teardown the dma pool for mailbox, passthru and extended passthru
1220  * structures, and scatter-gather lists
1221  */
1222 static void
1223 megaraid_mbox_teardown_dma_pools(adapter_t *adapter)
1224 {
1225         mraid_device_t          *raid_dev = ADAP2RAIDDEV(adapter);
1226         struct mraid_pci_blk    *epthru_pci_blk;
1227         struct mraid_pci_blk    *sg_pci_blk;
1228         struct mraid_pci_blk    *mbox_pci_blk;
1229         int                     i;
1230
1231
1232         sg_pci_blk = raid_dev->sg_pool;
1233         for (i = 0; i < MBOX_MAX_SCSI_CMDS && sg_pci_blk[i].vaddr; i++) {
1234                 pci_pool_free(raid_dev->sg_pool_handle, sg_pci_blk[i].vaddr,
1235                         sg_pci_blk[i].dma_addr);
1236         }
1237         if (raid_dev->sg_pool_handle)
1238                 pci_pool_destroy(raid_dev->sg_pool_handle);
1239
1240
1241         epthru_pci_blk = raid_dev->epthru_pool;
1242         for (i = 0; i < MBOX_MAX_SCSI_CMDS && epthru_pci_blk[i].vaddr; i++) {
1243                 pci_pool_free(raid_dev->epthru_pool_handle,
1244                         epthru_pci_blk[i].vaddr, epthru_pci_blk[i].dma_addr);
1245         }
1246         if (raid_dev->epthru_pool_handle)
1247                 pci_pool_destroy(raid_dev->epthru_pool_handle);
1248
1249
1250         mbox_pci_blk = raid_dev->mbox_pool;
1251         for (i = 0; i < MBOX_MAX_SCSI_CMDS && mbox_pci_blk[i].vaddr; i++) {
1252                 pci_pool_free(raid_dev->mbox_pool_handle,
1253                         mbox_pci_blk[i].vaddr, mbox_pci_blk[i].dma_addr);
1254         }
1255         if (raid_dev->mbox_pool_handle)
1256                 pci_pool_destroy(raid_dev->mbox_pool_handle);
1257
1258         return;
1259 }
1260
1261
1262 /**
1263  * megaraid_alloc_scb - detach and return a scb from the free list
1264  * @adapter     : controller's soft state
1265  *
1266  * return the scb from the head of the free list. NULL if there are none
1267  * available
1268  **/
1269 static scb_t *
1270 megaraid_alloc_scb(adapter_t *adapter, struct scsi_cmnd *scp)
1271 {
1272         struct list_head        *head = &adapter->kscb_pool;
1273         scb_t                   *scb = NULL;
1274         unsigned long           flags;
1275
1276         // detach scb from free pool
1277         spin_lock_irqsave(SCSI_FREE_LIST_LOCK(adapter), flags);
1278
1279         if (list_empty(head)) {
1280                 spin_unlock_irqrestore(SCSI_FREE_LIST_LOCK(adapter), flags);
1281                 return NULL;
1282         }
1283
1284         scb = list_entry(head->next, scb_t, list);
1285         list_del_init(&scb->list);
1286
1287         spin_unlock_irqrestore(SCSI_FREE_LIST_LOCK(adapter), flags);
1288
1289         scb->state      = SCB_ACTIVE;
1290         scb->scp        = scp;
1291         scb->dma_type   = MRAID_DMA_NONE;
1292
1293         return scb;
1294 }
1295
1296
1297 /**
1298  * megaraid_dealloc_scb - return the scb to the free pool
1299  * @adapter     : controller's soft state
1300  * @scb         : scb to be freed
1301  *
1302  * return the scb back to the free list of scbs. The caller must 'flush' the
1303  * SCB before calling us. E.g., performing pci_unamp and/or pci_sync etc.
1304  * NOTE NOTE: Make sure the scb is not on any list before calling this
1305  * routine.
1306  **/
1307 static inline void
1308 megaraid_dealloc_scb(adapter_t *adapter, scb_t *scb)
1309 {
1310         unsigned long           flags;
1311
1312         // put scb in the free pool
1313         scb->state      = SCB_FREE;
1314         scb->scp        = NULL;
1315         spin_lock_irqsave(SCSI_FREE_LIST_LOCK(adapter), flags);
1316
1317         list_add(&scb->list, &adapter->kscb_pool);
1318
1319         spin_unlock_irqrestore(SCSI_FREE_LIST_LOCK(adapter), flags);
1320
1321         return;
1322 }
1323
1324
1325 /**
1326  * megaraid_mbox_mksgl - make the scatter-gather list
1327  * @adapter     - controller's soft state
1328  * @scb         - scsi control block
1329  *
1330  * prepare the scatter-gather list
1331  */
1332 static int
1333 megaraid_mbox_mksgl(adapter_t *adapter, scb_t *scb)
1334 {
1335         struct scatterlist      *sgl;
1336         mbox_ccb_t              *ccb;
1337         struct page             *page;
1338         unsigned long           offset;
1339         struct scsi_cmnd        *scp;
1340         int                     sgcnt;
1341         int                     i;
1342
1343
1344         scp     = scb->scp;
1345         ccb     = (mbox_ccb_t *)scb->ccb;
1346
1347         // no mapping required if no data to be transferred
1348         if (!scp->request_buffer || !scp->request_bufflen)
1349                 return 0;
1350
1351         if (!scp->use_sg) {     /* scatter-gather list not used */
1352
1353                 page = virt_to_page(scp->request_buffer);
1354
1355                 offset = ((unsigned long)scp->request_buffer & ~PAGE_MASK);
1356
1357                 ccb->buf_dma_h = pci_map_page(adapter->pdev, page, offset,
1358                                                   scp->request_bufflen,
1359                                                   scb->dma_direction);
1360                 scb->dma_type = MRAID_DMA_WBUF;
1361
1362                 /*
1363                  * We need to handle special 64-bit commands that need a
1364                  * minimum of 1 SG
1365                  */
1366                 sgcnt = 1;
1367                 ccb->sgl64[0].address   = ccb->buf_dma_h;
1368                 ccb->sgl64[0].length    = scp->request_bufflen;
1369
1370                 return sgcnt;
1371         }
1372
1373         sgl = (struct scatterlist *)scp->request_buffer;
1374
1375         // The number of sg elements returned must not exceed our limit
1376         sgcnt = pci_map_sg(adapter->pdev, sgl, scp->use_sg,
1377                         scb->dma_direction);
1378
1379         if (sgcnt > adapter->sglen) {
1380                 con_log(CL_ANN, (KERN_CRIT
1381                         "megaraid critical: too many sg elements:%d\n",
1382                         sgcnt));
1383                 BUG();
1384         }
1385
1386         scb->dma_type = MRAID_DMA_WSG;
1387
1388         for (i = 0; i < sgcnt; i++, sgl++) {
1389                 ccb->sgl64[i].address   = sg_dma_address(sgl);
1390                 ccb->sgl64[i].length    = sg_dma_len(sgl);
1391         }
1392
1393         // Return count of SG nodes
1394         return sgcnt;
1395 }
1396
1397
1398 /**
1399  * mbox_post_cmd - issue a mailbox command
1400  * @adapter     - controller's soft state
1401  * @scb         - command to be issued
1402  *
1403  * post the command to the controller if mailbox is availble.
1404  */
1405 static int
1406 mbox_post_cmd(adapter_t *adapter, scb_t *scb)
1407 {
1408         mraid_device_t  *raid_dev = ADAP2RAIDDEV(adapter);
1409         mbox64_t        *mbox64;
1410         mbox_t          *mbox;
1411         mbox_ccb_t      *ccb;
1412         unsigned long   flags;
1413         unsigned int    i = 0;
1414
1415
1416         ccb     = (mbox_ccb_t *)scb->ccb;
1417         mbox    = raid_dev->mbox;
1418         mbox64  = raid_dev->mbox64;
1419
1420         /*
1421          * Check for busy mailbox. If it is, return failure - the caller
1422          * should retry later.
1423          */
1424         spin_lock_irqsave(MAILBOX_LOCK(raid_dev), flags);
1425
1426         if (unlikely(mbox->busy)) {
1427                 do {
1428                         udelay(1);
1429                         i++;
1430                         rmb();
1431                 } while(mbox->busy && (i < max_mbox_busy_wait));
1432
1433                 if (mbox->busy) {
1434
1435                         spin_unlock_irqrestore(MAILBOX_LOCK(raid_dev), flags);
1436
1437                         return -1;
1438                 }
1439         }
1440
1441
1442         // Copy this command's mailbox data into "adapter's" mailbox
1443         memcpy((caddr_t)mbox64, (caddr_t)ccb->mbox64, 22);
1444         mbox->cmdid = scb->sno;
1445
1446         adapter->outstanding_cmds++;
1447
1448         if (scb->dma_direction == PCI_DMA_TODEVICE) {
1449                 if (!scb->scp->use_sg) {        // sg list not used
1450                         pci_dma_sync_single_for_device(adapter->pdev,
1451                                         ccb->buf_dma_h,
1452                                         scb->scp->request_bufflen,
1453                                         PCI_DMA_TODEVICE);
1454                 }
1455                 else {
1456                         pci_dma_sync_sg_for_device(adapter->pdev,
1457                                 scb->scp->request_buffer,
1458                                 scb->scp->use_sg, PCI_DMA_TODEVICE);
1459                 }
1460         }
1461
1462         mbox->busy      = 1;    // Set busy
1463         mbox->poll      = 0;
1464         mbox->ack       = 0;
1465         wmb();
1466
1467         WRINDOOR(raid_dev, raid_dev->mbox_dma | 0x1);
1468
1469         spin_unlock_irqrestore(MAILBOX_LOCK(raid_dev), flags);
1470
1471         return 0;
1472 }
1473
1474
1475 /**
1476  * megaraid_queue_command - generic queue entry point for all LLDs
1477  * @scp         : pointer to the scsi command to be executed
1478  * @done        : callback routine to be called after the cmd has be completed
1479  *
1480  * Queue entry point for mailbox based controllers.
1481  */
1482 static int
1483 megaraid_queue_command(struct scsi_cmnd *scp, void (* done)(struct scsi_cmnd *))
1484 {
1485         adapter_t       *adapter;
1486         scb_t           *scb;
1487         int             if_busy;
1488
1489         adapter         = SCP2ADAPTER(scp);
1490         scp->scsi_done  = done;
1491         scp->result     = 0;
1492
1493         /*
1494          * Allocate and build a SCB request
1495          * if_busy flag will be set if megaraid_mbox_build_cmd() command could
1496          * not allocate scb. We will return non-zero status in that case.
1497          * NOTE: scb can be null even though certain commands completed
1498          * successfully, e.g., MODE_SENSE and TEST_UNIT_READY, it would
1499          * return 0 in that case, and we would do the callback right away.
1500          */
1501         if_busy = 0;
1502         scb = megaraid_mbox_build_cmd(adapter, scp, &if_busy);
1503         if (!scb) {     // command already completed
1504                 done(scp);
1505                 return 0;
1506         }
1507
1508         megaraid_mbox_runpendq(adapter, scb);
1509         return if_busy;
1510 }
1511
1512 /**
1513  * megaraid_mbox_build_cmd - transform the mid-layer scsi command to megaraid
1514  * firmware lingua
1515  * @adapter     - controller's soft state
1516  * @scp         - mid-layer scsi command pointer
1517  * @busy        - set if request could not be completed because of lack of
1518  *              resources
1519  *
1520  * convert the command issued by mid-layer to format understood by megaraid
1521  * firmware. We also complete certain command without sending them to firmware
1522  */
1523 static scb_t *
1524 megaraid_mbox_build_cmd(adapter_t *adapter, struct scsi_cmnd *scp, int *busy)
1525 {
1526         mraid_device_t          *rdev = ADAP2RAIDDEV(adapter);
1527         int                     channel;
1528         int                     target;
1529         int                     islogical;
1530         mbox_ccb_t              *ccb;
1531         mraid_passthru_t        *pthru;
1532         mbox64_t                *mbox64;
1533         mbox_t                  *mbox;
1534         scb_t                   *scb;
1535         char                    skip[] = "skipping";
1536         char                    scan[] = "scanning";
1537         char                    *ss;
1538
1539
1540         /*
1541          * Get the appropriate device map for the device this command is
1542          * intended for
1543          */
1544         MRAID_GET_DEVICE_MAP(adapter, scp, channel, target, islogical);
1545
1546         /*
1547          * Logical drive commands
1548          */
1549         if (islogical) {
1550                 switch (scp->cmnd[0]) {
1551                 case TEST_UNIT_READY:
1552                         /*
1553                          * Do we support clustering and is the support enabled
1554                          * If no, return success always
1555                          */
1556                         if (!adapter->ha) {
1557                                 scp->result = (DID_OK << 16);
1558                                 return NULL;
1559                         }
1560
1561                         if (!(scb = megaraid_alloc_scb(adapter, scp))) {
1562                                 scp->result = (DID_ERROR << 16);
1563                                 *busy = 1;
1564                                 return NULL;
1565                         }
1566
1567                         scb->dma_direction      = scp->sc_data_direction;
1568                         scb->dev_channel        = 0xFF;
1569                         scb->dev_target         = target;
1570                         ccb                     = (mbox_ccb_t *)scb->ccb;
1571
1572                         /*
1573                          * The command id will be provided by the command
1574                          * issuance routine
1575                          */
1576                         ccb->raw_mbox[0]        = CLUSTER_CMD;
1577                         ccb->raw_mbox[2]        = RESERVATION_STATUS;
1578                         ccb->raw_mbox[3]        = target;
1579
1580                         return scb;
1581
1582                 case MODE_SENSE:
1583                         if (scp->use_sg) {
1584                                 struct scatterlist      *sgl;
1585                                 caddr_t                 vaddr;
1586
1587                                 sgl = (struct scatterlist *)scp->request_buffer;
1588                                 if (sgl->page) {
1589                                         vaddr = (caddr_t)
1590                                                 (page_address((&sgl[0])->page)
1591                                                 + (&sgl[0])->offset);
1592
1593                                         memset(vaddr, 0, scp->cmnd[4]);
1594                                 }
1595                                 else {
1596                                         con_log(CL_ANN, (KERN_WARNING
1597                                         "megaraid mailbox: invalid sg:%d\n",
1598                                         __LINE__));
1599                                 }
1600                         }
1601                         else {
1602                                 memset(scp->request_buffer, 0, scp->cmnd[4]);
1603                         }
1604                         scp->result = (DID_OK << 16);
1605                         return NULL;
1606
1607                 case INQUIRY:
1608                         /*
1609                          * Display the channel scan for logical drives
1610                          * Do not display scan for a channel if already done.
1611                          */
1612                         if (!(rdev->last_disp & (1L << SCP2CHANNEL(scp)))) {
1613
1614                                 con_log(CL_ANN, (KERN_INFO
1615                                         "scsi[%d]: scanning scsi channel %d",
1616                                         adapter->host->host_no,
1617                                         SCP2CHANNEL(scp)));
1618
1619                                 con_log(CL_ANN, (
1620                                         " [virtual] for logical drives\n"));
1621
1622                                 rdev->last_disp |= (1L << SCP2CHANNEL(scp));
1623                         }
1624
1625                         /* Fall through */
1626
1627                 case READ_CAPACITY:
1628                         /*
1629                          * Do not allow LUN > 0 for logical drives and
1630                          * requests for more than 40 logical drives
1631                          */
1632                         if (SCP2LUN(scp)) {
1633                                 scp->result = (DID_BAD_TARGET << 16);
1634                                 return NULL;
1635                         }
1636                         if ((target % 0x80) >= MAX_LOGICAL_DRIVES_40LD) {
1637                                 scp->result = (DID_BAD_TARGET << 16);
1638                                 return NULL;
1639                         }
1640
1641
1642                         /* Allocate a SCB and initialize passthru */
1643                         if (!(scb = megaraid_alloc_scb(adapter, scp))) {
1644                                 scp->result = (DID_ERROR << 16);
1645                                 *busy = 1;
1646                                 return NULL;
1647                         }
1648
1649                         ccb                     = (mbox_ccb_t *)scb->ccb;
1650                         scb->dev_channel        = 0xFF;
1651                         scb->dev_target         = target;
1652                         pthru                   = ccb->pthru;
1653                         mbox                    = ccb->mbox;
1654                         mbox64                  = ccb->mbox64;
1655
1656                         pthru->timeout          = 0;
1657                         pthru->ars              = 1;
1658                         pthru->reqsenselen      = 14;
1659                         pthru->islogical        = 1;
1660                         pthru->logdrv           = target;
1661                         pthru->cdblen           = scp->cmd_len;
1662                         memcpy(pthru->cdb, scp->cmnd, scp->cmd_len);
1663
1664                         mbox->cmd               = MBOXCMD_PASSTHRU64;
1665                         scb->dma_direction      = scp->sc_data_direction;
1666
1667                         pthru->dataxferlen      = scp->request_bufflen;
1668                         pthru->dataxferaddr     = ccb->sgl_dma_h;
1669                         pthru->numsge           = megaraid_mbox_mksgl(adapter,
1670                                                         scb);
1671
1672                         mbox->xferaddr          = 0xFFFFFFFF;
1673                         mbox64->xferaddr_lo     = (uint32_t )ccb->pthru_dma_h;
1674                         mbox64->xferaddr_hi     = 0;
1675
1676                         return scb;
1677
1678                 case READ_6:
1679                 case WRITE_6:
1680                 case READ_10:
1681                 case WRITE_10:
1682                 case READ_12:
1683                 case WRITE_12:
1684
1685                         /*
1686                          * Allocate a SCB and initialize mailbox
1687                          */
1688                         if (!(scb = megaraid_alloc_scb(adapter, scp))) {
1689                                 scp->result = (DID_ERROR << 16);
1690                                 *busy = 1;
1691                                 return NULL;
1692                         }
1693                         ccb                     = (mbox_ccb_t *)scb->ccb;
1694                         scb->dev_channel        = 0xFF;
1695                         scb->dev_target         = target;
1696                         mbox                    = ccb->mbox;
1697                         mbox64                  = ccb->mbox64;
1698                         mbox->logdrv            = target;
1699
1700                         /*
1701                          * A little HACK: 2nd bit is zero for all scsi read
1702                          * commands and is set for all scsi write commands
1703                          */
1704                         mbox->cmd = (scp->cmnd[0] & 0x02) ?  MBOXCMD_LWRITE64:
1705                                         MBOXCMD_LREAD64 ;
1706
1707                         /*
1708                          * 6-byte READ(0x08) or WRITE(0x0A) cdb
1709                          */
1710                         if (scp->cmd_len == 6) {
1711                                 mbox->numsectors = (uint32_t)scp->cmnd[4];
1712                                 mbox->lba =
1713                                         ((uint32_t)scp->cmnd[1] << 16)  |
1714                                         ((uint32_t)scp->cmnd[2] << 8)   |
1715                                         (uint32_t)scp->cmnd[3];
1716
1717                                 mbox->lba &= 0x1FFFFF;
1718                         }
1719
1720                         /*
1721                          * 10-byte READ(0x28) or WRITE(0x2A) cdb
1722                          */
1723                         else if (scp->cmd_len == 10) {
1724                                 mbox->numsectors =
1725                                         (uint32_t)scp->cmnd[8] |
1726                                         ((uint32_t)scp->cmnd[7] << 8);
1727                                 mbox->lba =
1728                                         ((uint32_t)scp->cmnd[2] << 24) |
1729                                         ((uint32_t)scp->cmnd[3] << 16) |
1730                                         ((uint32_t)scp->cmnd[4] << 8) |
1731                                         (uint32_t)scp->cmnd[5];
1732                         }
1733
1734                         /*
1735                          * 12-byte READ(0xA8) or WRITE(0xAA) cdb
1736                          */
1737                         else if (scp->cmd_len == 12) {
1738                                 mbox->lba =
1739                                         ((uint32_t)scp->cmnd[2] << 24) |
1740                                         ((uint32_t)scp->cmnd[3] << 16) |
1741                                         ((uint32_t)scp->cmnd[4] << 8) |
1742                                         (uint32_t)scp->cmnd[5];
1743
1744                                 mbox->numsectors =
1745                                         ((uint32_t)scp->cmnd[6] << 24) |
1746                                         ((uint32_t)scp->cmnd[7] << 16) |
1747                                         ((uint32_t)scp->cmnd[8] << 8) |
1748                                         (uint32_t)scp->cmnd[9];
1749                         }
1750                         else {
1751                                 con_log(CL_ANN, (KERN_WARNING
1752                                         "megaraid: unsupported CDB length\n"));
1753
1754                                 megaraid_dealloc_scb(adapter, scb);
1755
1756                                 scp->result = (DID_ERROR << 16);
1757                                 return NULL;
1758                         }
1759
1760                         scb->dma_direction = scp->sc_data_direction;
1761
1762                         // Calculate Scatter-Gather info
1763                         mbox64->xferaddr_lo     = (uint32_t )ccb->sgl_dma_h;
1764                         mbox->numsge            = megaraid_mbox_mksgl(adapter,
1765                                                         scb);
1766                         mbox->xferaddr          = 0xFFFFFFFF;
1767                         mbox64->xferaddr_hi     = 0;
1768
1769                         return scb;
1770
1771                 case RESERVE:
1772                 case RELEASE:
1773                         /*
1774                          * Do we support clustering and is the support enabled
1775                          */
1776                         if (!adapter->ha) {
1777                                 scp->result = (DID_BAD_TARGET << 16);
1778                                 return NULL;
1779                         }
1780
1781                         /*
1782                          * Allocate a SCB and initialize mailbox
1783                          */
1784                         if (!(scb = megaraid_alloc_scb(adapter, scp))) {
1785                                 scp->result = (DID_ERROR << 16);
1786                                 *busy = 1;
1787                                 return NULL;
1788                         }
1789
1790                         ccb                     = (mbox_ccb_t *)scb->ccb;
1791                         scb->dev_channel        = 0xFF;
1792                         scb->dev_target         = target;
1793                         ccb->raw_mbox[0]        = CLUSTER_CMD;
1794                         ccb->raw_mbox[2]        =  (scp->cmnd[0] == RESERVE) ?
1795                                                 RESERVE_LD : RELEASE_LD;
1796
1797                         ccb->raw_mbox[3]        = target;
1798                         scb->dma_direction      = scp->sc_data_direction;
1799
1800                         return scb;
1801
1802                 default:
1803                         scp->result = (DID_BAD_TARGET << 16);
1804                         return NULL;
1805                 }
1806         }
1807         else { // Passthru device commands
1808
1809                 // Do not allow access to target id > 15 or LUN > 7
1810                 if (target > 15 || SCP2LUN(scp) > 7) {
1811                         scp->result = (DID_BAD_TARGET << 16);
1812                         return NULL;
1813                 }
1814
1815                 // if fast load option was set and scan for last device is
1816                 // over, reset the fast_load flag so that during a possible
1817                 // next scan, devices can be made available
1818                 if (rdev->fast_load && (target == 15) &&
1819                         (SCP2CHANNEL(scp) == adapter->max_channel -1)) {
1820
1821                         con_log(CL_ANN, (KERN_INFO
1822                         "megaraid[%d]: physical device scan re-enabled\n",
1823                                 adapter->host->host_no));
1824                         rdev->fast_load = 0;
1825                 }
1826
1827                 /*
1828                  * Display the channel scan for physical devices
1829                  */
1830                 if (!(rdev->last_disp & (1L << SCP2CHANNEL(scp)))) {
1831
1832                         ss = rdev->fast_load ? skip : scan;
1833
1834                         con_log(CL_ANN, (KERN_INFO
1835                                 "scsi[%d]: %s scsi channel %d [Phy %d]",
1836                                 adapter->host->host_no, ss, SCP2CHANNEL(scp),
1837                                 channel));
1838
1839                         con_log(CL_ANN, (
1840                                 " for non-raid devices\n"));
1841
1842                         rdev->last_disp |= (1L << SCP2CHANNEL(scp));
1843                 }
1844
1845                 // disable channel sweep if fast load option given
1846                 if (rdev->fast_load) {
1847                         scp->result = (DID_BAD_TARGET << 16);
1848                         return NULL;
1849                 }
1850
1851                 // Allocate a SCB and initialize passthru
1852                 if (!(scb = megaraid_alloc_scb(adapter, scp))) {
1853                         scp->result = (DID_ERROR << 16);
1854                         *busy = 1;
1855                         return NULL;
1856                 }
1857
1858                 ccb                     = (mbox_ccb_t *)scb->ccb;
1859                 scb->dev_channel        = channel;
1860                 scb->dev_target         = target;
1861                 scb->dma_direction      = scp->sc_data_direction;
1862                 mbox                    = ccb->mbox;
1863                 mbox64                  = ccb->mbox64;
1864
1865                 // Does this firmware support extended CDBs
1866                 if (adapter->max_cdb_sz == 16) {
1867                         mbox->cmd               = MBOXCMD_EXTPTHRU;
1868
1869                         megaraid_mbox_prepare_epthru(adapter, scb, scp);
1870
1871                         mbox64->xferaddr_lo     = (uint32_t)ccb->epthru_dma_h;
1872                         mbox64->xferaddr_hi     = 0;
1873                         mbox->xferaddr          = 0xFFFFFFFF;
1874                 }
1875                 else {
1876                         mbox->cmd = MBOXCMD_PASSTHRU64;
1877
1878                         megaraid_mbox_prepare_pthru(adapter, scb, scp);
1879
1880                         mbox64->xferaddr_lo     = (uint32_t)ccb->pthru_dma_h;
1881                         mbox64->xferaddr_hi     = 0;
1882                         mbox->xferaddr          = 0xFFFFFFFF;
1883                 }
1884                 return scb;
1885         }
1886
1887         // NOT REACHED
1888 }
1889
1890
1891 /**
1892  * megaraid_mbox_runpendq - execute commands queued in the pending queue
1893  * @adapter     : controller's soft state
1894  * @scb         : SCB to be queued in the pending list
1895  *
1896  * scan the pending list for commands which are not yet issued and try to
1897  * post to the controller. The SCB can be a null pointer, which would indicate
1898  * no SCB to be queue, just try to execute the ones in the pending list.
1899  *
1900  * NOTE: We do not actually traverse the pending list. The SCBs are plucked
1901  * out from the head of the pending list. If it is successfully issued, the
1902  * next SCB is at the head now.
1903  */
1904 static void
1905 megaraid_mbox_runpendq(adapter_t *adapter, scb_t *scb_q)
1906 {
1907         scb_t                   *scb;
1908         unsigned long           flags;
1909
1910         spin_lock_irqsave(PENDING_LIST_LOCK(adapter), flags);
1911
1912         if (scb_q) {
1913                 scb_q->state = SCB_PENDQ;
1914                 list_add_tail(&scb_q->list, &adapter->pend_list);
1915         }
1916
1917         // if the adapter in not in quiescent mode, post the commands to FW
1918         if (adapter->quiescent) {
1919                 spin_unlock_irqrestore(PENDING_LIST_LOCK(adapter), flags);
1920                 return;
1921         }
1922
1923         while (!list_empty(&adapter->pend_list)) {
1924
1925                 assert_spin_locked(PENDING_LIST_LOCK(adapter));
1926
1927                 scb = list_entry(adapter->pend_list.next, scb_t, list);
1928
1929                 // remove the scb from the pending list and try to
1930                 // issue. If we are unable to issue it, put back in
1931                 // the pending list and return
1932
1933                 list_del_init(&scb->list);
1934
1935                 spin_unlock_irqrestore(PENDING_LIST_LOCK(adapter), flags);
1936
1937                 // if mailbox was busy, return SCB back to pending
1938                 // list. Make sure to add at the head, since that's
1939                 // where it would have been removed from
1940
1941                 scb->state = SCB_ISSUED;
1942
1943                 if (mbox_post_cmd(adapter, scb) != 0) {
1944
1945                         spin_lock_irqsave(PENDING_LIST_LOCK(adapter), flags);
1946
1947                         scb->state = SCB_PENDQ;
1948
1949                         list_add(&scb->list, &adapter->pend_list);
1950
1951                         spin_unlock_irqrestore(PENDING_LIST_LOCK(adapter),
1952                                 flags);
1953
1954                         return;
1955                 }
1956
1957                 spin_lock_irqsave(PENDING_LIST_LOCK(adapter), flags);
1958         }
1959
1960         spin_unlock_irqrestore(PENDING_LIST_LOCK(adapter), flags);
1961
1962
1963         return;
1964 }
1965
1966
1967 /**
1968  * megaraid_mbox_prepare_pthru - prepare a command for physical devices
1969  * @adapter     - pointer to controller's soft state
1970  * @scb         - scsi control block
1971  * @scp         - scsi command from the mid-layer
1972  *
1973  * prepare a command for the scsi physical devices
1974  */
1975 static void
1976 megaraid_mbox_prepare_pthru(adapter_t *adapter, scb_t *scb,
1977                 struct scsi_cmnd *scp)
1978 {
1979         mbox_ccb_t              *ccb;
1980         mraid_passthru_t        *pthru;
1981         uint8_t                 channel;
1982         uint8_t                 target;
1983
1984         ccb     = (mbox_ccb_t *)scb->ccb;
1985         pthru   = ccb->pthru;
1986         channel = scb->dev_channel;
1987         target  = scb->dev_target;
1988
1989         // 0=6sec, 1=60sec, 2=10min, 3=3hrs, 4=NO timeout
1990         pthru->timeout          = 4;
1991         pthru->ars              = 1;
1992         pthru->islogical        = 0;
1993         pthru->channel          = 0;
1994         pthru->target           = (channel << 4) | target;
1995         pthru->logdrv           = SCP2LUN(scp);
1996         pthru->reqsenselen      = 14;
1997         pthru->cdblen           = scp->cmd_len;
1998
1999         memcpy(pthru->cdb, scp->cmnd, scp->cmd_len);
2000
2001         if (scp->request_bufflen) {
2002                 pthru->dataxferlen      = scp->request_bufflen;
2003                 pthru->dataxferaddr     = ccb->sgl_dma_h;
2004                 pthru->numsge           = megaraid_mbox_mksgl(adapter, scb);
2005         }
2006         else {
2007                 pthru->dataxferaddr     = 0;
2008                 pthru->dataxferlen      = 0;
2009                 pthru->numsge           = 0;
2010         }
2011         return;
2012 }
2013
2014
2015 /**
2016  * megaraid_mbox_prepare_epthru - prepare a command for physical devices
2017  * @adapter     - pointer to controller's soft state
2018  * @scb         - scsi control block
2019  * @scp         - scsi command from the mid-layer
2020  *
2021  * prepare a command for the scsi physical devices. This rountine prepares
2022  * commands for devices which can take extended CDBs (>10 bytes)
2023  */
2024 static void
2025 megaraid_mbox_prepare_epthru(adapter_t *adapter, scb_t *scb,
2026                 struct scsi_cmnd *scp)
2027 {
2028         mbox_ccb_t              *ccb;
2029         mraid_epassthru_t       *epthru;
2030         uint8_t                 channel;
2031         uint8_t                 target;
2032
2033         ccb     = (mbox_ccb_t *)scb->ccb;
2034         epthru  = ccb->epthru;
2035         channel = scb->dev_channel;
2036         target  = scb->dev_target;
2037
2038         // 0=6sec, 1=60sec, 2=10min, 3=3hrs, 4=NO timeout
2039         epthru->timeout         = 4;
2040         epthru->ars             = 1;
2041         epthru->islogical       = 0;
2042         epthru->channel         = 0;
2043         epthru->target          = (channel << 4) | target;
2044         epthru->logdrv          = SCP2LUN(scp);
2045         epthru->reqsenselen     = 14;
2046         epthru->cdblen          = scp->cmd_len;
2047
2048         memcpy(epthru->cdb, scp->cmnd, scp->cmd_len);
2049
2050         if (scp->request_bufflen) {
2051                 epthru->dataxferlen     = scp->request_bufflen;
2052                 epthru->dataxferaddr    = ccb->sgl_dma_h;
2053                 epthru->numsge          = megaraid_mbox_mksgl(adapter, scb);
2054         }
2055         else {
2056                 epthru->dataxferaddr    = 0;
2057                 epthru->dataxferlen     = 0;
2058                 epthru->numsge          = 0;
2059         }
2060         return;
2061 }
2062
2063
2064 /**
2065  * megaraid_ack_sequence - interrupt ack sequence for memory mapped HBAs
2066  * @adapter     - controller's soft state
2067  *
2068  * Interrupt ackrowledgement sequence for memory mapped HBAs. Find out the
2069  * completed command and put them on the completed list for later processing.
2070  *
2071  * Returns:     1 if the interrupt is valid, 0 otherwise
2072  */
2073 static int
2074 megaraid_ack_sequence(adapter_t *adapter)
2075 {
2076         mraid_device_t          *raid_dev = ADAP2RAIDDEV(adapter);
2077         mbox_t                  *mbox;
2078         scb_t                   *scb;
2079         uint8_t                 nstatus;
2080         uint8_t                 completed[MBOX_MAX_FIRMWARE_STATUS];
2081         struct list_head        clist;
2082         int                     handled;
2083         uint32_t                dword;
2084         unsigned long           flags;
2085         int                     i, j;
2086
2087
2088         mbox    = raid_dev->mbox;
2089
2090         // move the SCBs from the firmware completed array to our local list
2091         INIT_LIST_HEAD(&clist);
2092
2093         // loop till F/W has more commands for us to complete
2094         handled = 0;
2095         spin_lock_irqsave(MAILBOX_LOCK(raid_dev), flags);
2096         do {
2097                 /*
2098                  * Check if a valid interrupt is pending. If found, force the
2099                  * interrupt line low.
2100                  */
2101                 dword = RDOUTDOOR(raid_dev);
2102                 if (dword != 0x10001234) break;
2103
2104                 handled = 1;
2105
2106                 WROUTDOOR(raid_dev, 0x10001234);
2107
2108                 nstatus = 0;
2109                 // wait for valid numstatus to post
2110                 for (i = 0; i < 0xFFFFF; i++) {
2111                         if (mbox->numstatus != 0xFF) {
2112                                 nstatus = mbox->numstatus;
2113                                 break;
2114                         }
2115                         rmb();
2116                 }
2117                 mbox->numstatus = 0xFF;
2118
2119                 adapter->outstanding_cmds -= nstatus;
2120
2121                 for (i = 0; i < nstatus; i++) {
2122
2123                         // wait for valid command index to post
2124                         for (j = 0; j < 0xFFFFF; j++) {
2125                                 if (mbox->completed[i] != 0xFF) break;
2126                                 rmb();
2127                         }
2128                         completed[i]            = mbox->completed[i];
2129                         mbox->completed[i]      = 0xFF;
2130
2131                         if (completed[i] == 0xFF) {
2132                                 con_log(CL_ANN, (KERN_CRIT
2133                                 "megaraid: command posting timed out\n"));
2134
2135                                 BUG();
2136                                 continue;
2137                         }
2138
2139                         // Get SCB associated with this command id
2140                         if (completed[i] >= MBOX_MAX_SCSI_CMDS) {
2141                                 // a cmm command
2142                                 scb = adapter->uscb_list + (completed[i] -
2143                                                 MBOX_MAX_SCSI_CMDS);
2144                         }
2145                         else {
2146                                 // an os command
2147                                 scb = adapter->kscb_list + completed[i];
2148                         }
2149
2150                         scb->status = mbox->status;
2151                         list_add_tail(&scb->list, &clist);
2152                 }
2153
2154                 // Acknowledge interrupt
2155                 WRINDOOR(raid_dev, 0x02);
2156
2157         } while(1);
2158
2159         spin_unlock_irqrestore(MAILBOX_LOCK(raid_dev), flags);
2160
2161
2162         // put the completed commands in the completed list. DPC would
2163         // complete these commands later
2164         spin_lock_irqsave(COMPLETED_LIST_LOCK(adapter), flags);
2165
2166         list_splice(&clist, &adapter->completed_list);
2167
2168         spin_unlock_irqrestore(COMPLETED_LIST_LOCK(adapter), flags);
2169
2170
2171         // schedule the DPC if there is some work for it
2172         if (handled)
2173                 tasklet_schedule(&adapter->dpc_h);
2174
2175         return handled;
2176 }
2177
2178
2179 /**
2180  * megaraid_isr - isr for memory based mailbox based controllers
2181  * @irq         - irq
2182  * @devp        - pointer to our soft state
2183  * @regs        - unused
2184  *
2185  * Interrupt service routine for memory-mapped mailbox controllers.
2186  */
2187 static irqreturn_t
2188 megaraid_isr(int irq, void *devp, struct pt_regs *regs)
2189 {
2190         adapter_t       *adapter = devp;
2191         int             handled;
2192
2193         handled = megaraid_ack_sequence(adapter);
2194
2195         /* Loop through any pending requests */
2196         if (!adapter->quiescent) {
2197                 megaraid_mbox_runpendq(adapter, NULL);
2198         }
2199
2200         return IRQ_RETVAL(handled);
2201 }
2202
2203
2204 /**
2205  * megaraid_mbox_sync_scb - sync kernel buffers
2206  * @adapter     : controller's soft state
2207  * @scb         : pointer to the resource packet
2208  *
2209  * DMA sync if required.
2210  */
2211 static void
2212 megaraid_mbox_sync_scb(adapter_t *adapter, scb_t *scb)
2213 {
2214         mbox_ccb_t      *ccb;
2215
2216         ccb     = (mbox_ccb_t *)scb->ccb;
2217
2218         switch (scb->dma_type) {
2219
2220         case MRAID_DMA_WBUF:
2221                 if (scb->dma_direction == PCI_DMA_FROMDEVICE) {
2222                         pci_dma_sync_single_for_cpu(adapter->pdev,
2223                                         ccb->buf_dma_h,
2224                                         scb->scp->request_bufflen,
2225                                         PCI_DMA_FROMDEVICE);
2226                 }
2227
2228                 pci_unmap_page(adapter->pdev, ccb->buf_dma_h,
2229                         scb->scp->request_bufflen, scb->dma_direction);
2230
2231                 break;
2232
2233         case MRAID_DMA_WSG:
2234                 if (scb->dma_direction == PCI_DMA_FROMDEVICE) {
2235                         pci_dma_sync_sg_for_cpu(adapter->pdev,
2236                                         scb->scp->request_buffer,
2237                                         scb->scp->use_sg, PCI_DMA_FROMDEVICE);
2238                 }
2239
2240                 pci_unmap_sg(adapter->pdev, scb->scp->request_buffer,
2241                         scb->scp->use_sg, scb->dma_direction);
2242
2243                 break;
2244
2245         default:
2246                 break;
2247         }
2248
2249         return;
2250 }
2251
2252
2253 /**
2254  * megaraid_mbox_dpc - the tasklet to complete the commands from completed list
2255  * @devp        : pointer to HBA soft state
2256  *
2257  * Pick up the commands from the completed list and send back to the owners.
2258  * This is a reentrant function and does not assume any locks are held while
2259  * it is being called.
2260  */
2261 static void
2262 megaraid_mbox_dpc(unsigned long devp)
2263 {
2264         adapter_t               *adapter = (adapter_t *)devp;
2265         mraid_device_t          *raid_dev;
2266         struct list_head        clist;
2267         struct scatterlist      *sgl;
2268         scb_t                   *scb;
2269         scb_t                   *tmp;
2270         struct scsi_cmnd        *scp;
2271         mraid_passthru_t        *pthru;
2272         mraid_epassthru_t       *epthru;
2273         mbox_ccb_t              *ccb;
2274         int                     islogical;
2275         int                     pdev_index;
2276         int                     pdev_state;
2277         mbox_t                  *mbox;
2278         unsigned long           flags;
2279         uint8_t                 c;
2280         int                     status;
2281
2282
2283         if (!adapter) return;
2284
2285         raid_dev = ADAP2RAIDDEV(adapter);
2286
2287         // move the SCBs from the completed list to our local list
2288         INIT_LIST_HEAD(&clist);
2289
2290         spin_lock_irqsave(COMPLETED_LIST_LOCK(adapter), flags);
2291
2292         list_splice_init(&adapter->completed_list, &clist);
2293
2294         spin_unlock_irqrestore(COMPLETED_LIST_LOCK(adapter), flags);
2295
2296
2297         list_for_each_entry_safe(scb, tmp, &clist, list) {
2298
2299                 status          = scb->status;
2300                 scp             = scb->scp;
2301                 ccb             = (mbox_ccb_t *)scb->ccb;
2302                 pthru           = ccb->pthru;
2303                 epthru          = ccb->epthru;
2304                 mbox            = ccb->mbox;
2305
2306                 // Make sure f/w has completed a valid command
2307                 if (scb->state != SCB_ISSUED) {
2308                         con_log(CL_ANN, (KERN_CRIT
2309                         "megaraid critical err: invalid command %d:%d:%p\n",
2310                                 scb->sno, scb->state, scp));
2311                         BUG();
2312                         continue;       // Must never happen!
2313                 }
2314
2315                 // check for the management command and complete it right away
2316                 if (scb->sno >= MBOX_MAX_SCSI_CMDS) {
2317                         scb->state      = SCB_FREE;
2318                         scb->status     = status;
2319
2320                         // remove from local clist
2321                         list_del_init(&scb->list);
2322
2323                         megaraid_mbox_mm_done(adapter, scb);
2324
2325                         continue;
2326                 }
2327
2328                 // Was an abort issued for this command earlier
2329                 if (scb->state & SCB_ABORT) {
2330                         con_log(CL_ANN, (KERN_NOTICE
2331                         "megaraid: aborted cmd %lx[%x] completed\n",
2332                                 scp->serial_number, scb->sno));
2333                 }
2334
2335                 /*
2336                  * If the inquiry came of a disk drive which is not part of
2337                  * any RAID array, expose it to the kernel. For this to be
2338                  * enabled, user must set the "megaraid_expose_unconf_disks"
2339                  * flag to 1 by specifying it on module parameter list.
2340                  * This would enable data migration off drives from other
2341                  * configurations.
2342                  */
2343                 islogical = MRAID_IS_LOGICAL(adapter, scp);
2344                 if (scp->cmnd[0] == INQUIRY && status == 0 && islogical == 0
2345                                 && IS_RAID_CH(raid_dev, scb->dev_channel)) {
2346
2347                         if (scp->use_sg) {
2348                                 sgl = (struct scatterlist *)
2349                                         scp->request_buffer;
2350
2351                                 if (sgl->page) {
2352                                         c = *(unsigned char *)
2353                                         (page_address((&sgl[0])->page) +
2354                                                 (&sgl[0])->offset);
2355                                 }
2356                                 else {
2357                                         con_log(CL_ANN, (KERN_WARNING
2358                                         "megaraid mailbox: invalid sg:%d\n",
2359                                         __LINE__));
2360                                         c = 0;
2361                                 }
2362                         }
2363                         else {
2364                                 c = *(uint8_t *)scp->request_buffer;
2365                         }
2366
2367                         if ((c & 0x1F ) == TYPE_DISK) {
2368                                 pdev_index = (scb->dev_channel * 16) +
2369                                         scb->dev_target;
2370                                 pdev_state =
2371                                         raid_dev->pdrv_state[pdev_index] & 0x0F;
2372
2373                                 if (pdev_state == PDRV_ONLINE           ||
2374                                         pdev_state == PDRV_FAILED       ||
2375                                         pdev_state == PDRV_RBLD         ||
2376                                         pdev_state == PDRV_HOTSPARE     ||
2377                                         megaraid_expose_unconf_disks == 0) {
2378
2379                                         status = 0xF0;
2380                                 }
2381                         }
2382                 }
2383
2384                 // Convert MegaRAID status to Linux error code
2385                 switch (status) {
2386
2387                 case 0x00:
2388
2389                         scp->result = (DID_OK << 16);
2390                         break;
2391
2392                 case 0x02:
2393
2394                         /* set sense_buffer and result fields */
2395                         if (mbox->cmd == MBOXCMD_PASSTHRU ||
2396                                 mbox->cmd == MBOXCMD_PASSTHRU64) {
2397
2398                                 memcpy(scp->sense_buffer, pthru->reqsensearea,
2399                                                 14);
2400
2401                                 scp->result = DRIVER_SENSE << 24 |
2402                                         DID_OK << 16 | CHECK_CONDITION << 1;
2403                         }
2404                         else {
2405                                 if (mbox->cmd == MBOXCMD_EXTPTHRU) {
2406
2407                                         memcpy(scp->sense_buffer,
2408                                                 epthru->reqsensearea, 14);
2409
2410                                         scp->result = DRIVER_SENSE << 24 |
2411                                                 DID_OK << 16 |
2412                                                 CHECK_CONDITION << 1;
2413                                 } else {
2414                                         scp->sense_buffer[0] = 0x70;
2415                                         scp->sense_buffer[2] = ABORTED_COMMAND;
2416                                         scp->result = CHECK_CONDITION << 1;
2417                                 }
2418                         }
2419                         break;
2420
2421                 case 0x08:
2422
2423                         scp->result = DID_BUS_BUSY << 16 | status;
2424                         break;
2425
2426                 default:
2427
2428                         /*
2429                          * If TEST_UNIT_READY fails, we know RESERVATION_STATUS
2430                          * failed
2431                          */
2432                         if (scp->cmnd[0] == TEST_UNIT_READY) {
2433                                 scp->result = DID_ERROR << 16 |
2434                                         RESERVATION_CONFLICT << 1;
2435                         }
2436                         else
2437                         /*
2438                          * Error code returned is 1 if Reserve or Release
2439                          * failed or the input parameter is invalid
2440                          */
2441                         if (status == 1 && (scp->cmnd[0] == RESERVE ||
2442                                          scp->cmnd[0] == RELEASE)) {
2443
2444                                 scp->result = DID_ERROR << 16 |
2445                                         RESERVATION_CONFLICT << 1;
2446                         }
2447                         else {
2448                                 scp->result = DID_BAD_TARGET << 16 | status;
2449                         }
2450                 }
2451
2452                 // print a debug message for all failed commands
2453                 if (status) {
2454                         megaraid_mbox_display_scb(adapter, scb);
2455                 }
2456
2457                 // Free our internal resources and call the mid-layer callback
2458                 // routine
2459                 megaraid_mbox_sync_scb(adapter, scb);
2460
2461                 // remove from local clist
2462                 list_del_init(&scb->list);
2463
2464                 // put back in free list
2465                 megaraid_dealloc_scb(adapter, scb);
2466
2467                 // send the scsi packet back to kernel
2468                 scp->scsi_done(scp);
2469         }
2470
2471         return;
2472 }
2473
2474
2475 /**
2476  * megaraid_abort_handler - abort the scsi command
2477  * @scp         : command to be aborted
2478  *
2479  * Abort a previous SCSI request. Only commands on the pending list can be
2480  * aborted. All the commands issued to the F/W must complete.
2481  **/
2482 static int
2483 megaraid_abort_handler(struct scsi_cmnd *scp)
2484 {
2485         adapter_t               *adapter;
2486         mraid_device_t          *raid_dev;
2487         scb_t                   *scb;
2488         scb_t                   *tmp;
2489         int                     found;
2490         unsigned long           flags;
2491         int                     i;
2492
2493
2494         adapter         = SCP2ADAPTER(scp);
2495         raid_dev        = ADAP2RAIDDEV(adapter);
2496
2497         con_log(CL_ANN, (KERN_WARNING
2498                 "megaraid: aborting-%ld cmd=%x <c=%d t=%d l=%d>\n",
2499                 scp->serial_number, scp->cmnd[0], SCP2CHANNEL(scp),
2500                 SCP2TARGET(scp), SCP2LUN(scp)));
2501
2502         // If FW has stopped responding, simply return failure
2503         if (raid_dev->hw_error) {
2504                 con_log(CL_ANN, (KERN_NOTICE
2505                         "megaraid: hw error, not aborting\n"));
2506                 return FAILED;
2507         }
2508
2509         // There might a race here, where the command was completed by the
2510         // firmware and now it is on the completed list. Before we could
2511         // complete the command to the kernel in dpc, the abort came.
2512         // Find out if this is the case to avoid the race.
2513         scb = NULL;
2514         spin_lock_irqsave(COMPLETED_LIST_LOCK(adapter), flags);
2515         list_for_each_entry_safe(scb, tmp, &adapter->completed_list, list) {
2516
2517                 if (scb->scp == scp) {  // Found command
2518
2519                         list_del_init(&scb->list);      // from completed list
2520
2521                         con_log(CL_ANN, (KERN_WARNING
2522                         "megaraid: %ld:%d[%d:%d], abort from completed list\n",
2523                                 scp->serial_number, scb->sno,
2524                                 scb->dev_channel, scb->dev_target));
2525
2526                         scp->result = (DID_ABORT << 16);
2527                         scp->scsi_done(scp);
2528
2529                         megaraid_dealloc_scb(adapter, scb);
2530
2531                         spin_unlock_irqrestore(COMPLETED_LIST_LOCK(adapter),
2532                                 flags);
2533
2534                         return SUCCESS;
2535                 }
2536         }
2537         spin_unlock_irqrestore(COMPLETED_LIST_LOCK(adapter), flags);
2538
2539
2540         // Find out if this command is still on the pending list. If it is and
2541         // was never issued, abort and return success. If the command is owned
2542         // by the firmware, we must wait for it to complete by the FW.
2543         spin_lock_irqsave(PENDING_LIST_LOCK(adapter), flags);
2544         list_for_each_entry_safe(scb, tmp, &adapter->pend_list, list) {
2545
2546                 if (scb->scp == scp) {  // Found command
2547
2548                         list_del_init(&scb->list);      // from pending list
2549
2550                         ASSERT(!(scb->state & SCB_ISSUED));
2551
2552                         con_log(CL_ANN, (KERN_WARNING
2553                                 "megaraid abort: %ld[%d:%d], driver owner\n",
2554                                 scp->serial_number, scb->dev_channel,
2555                                 scb->dev_target));
2556
2557                         scp->result = (DID_ABORT << 16);
2558                         scp->scsi_done(scp);
2559
2560                         megaraid_dealloc_scb(adapter, scb);
2561
2562                         spin_unlock_irqrestore(PENDING_LIST_LOCK(adapter),
2563                                 flags);
2564
2565                         return SUCCESS;
2566                 }
2567         }
2568         spin_unlock_irqrestore(PENDING_LIST_LOCK(adapter), flags);
2569
2570
2571         // Check do we even own this command, in which case this would be
2572         // owned by the firmware. The only way to locate the FW scb is to
2573         // traverse through the list of all SCB, since driver does not
2574         // maintain these SCBs on any list
2575         found = 0;
2576         spin_lock_irq(&adapter->lock);
2577         for (i = 0; i < MBOX_MAX_SCSI_CMDS; i++) {
2578                 scb = adapter->kscb_list + i;
2579
2580                 if (scb->scp == scp) {
2581
2582                         found = 1;
2583
2584                         if (!(scb->state & SCB_ISSUED)) {
2585                                 con_log(CL_ANN, (KERN_WARNING
2586                                 "megaraid abort: %ld%d[%d:%d], invalid state\n",
2587                                 scp->serial_number, scb->sno, scb->dev_channel,
2588                                 scb->dev_target));
2589                                 BUG();
2590                         }
2591                         else {
2592                                 con_log(CL_ANN, (KERN_WARNING
2593                                 "megaraid abort: %ld:%d[%d:%d], fw owner\n",
2594                                 scp->serial_number, scb->sno, scb->dev_channel,
2595                                 scb->dev_target));
2596                         }
2597                 }
2598         }
2599         spin_unlock_irq(&adapter->lock);
2600
2601         if (!found) {
2602                 con_log(CL_ANN, (KERN_WARNING
2603                         "megaraid abort: scsi cmd:%ld, do now own\n",
2604                         scp->serial_number));
2605
2606                 // FIXME: Should there be a callback for this command?
2607                 return SUCCESS;
2608         }
2609
2610         // We cannot actually abort a command owned by firmware, return
2611         // failure and wait for reset. In host reset handler, we will find out
2612         // if the HBA is still live
2613         return FAILED;
2614 }
2615
2616 /**
2617  * megaraid_reset_handler - device reset hadler for mailbox based driver
2618  * @scp         : reference command
2619  *
2620  * Reset handler for the mailbox based controller. First try to find out if
2621  * the FW is still live, in which case the outstanding commands counter mut go
2622  * down to 0. If that happens, also issue the reservation reset command to
2623  * relinquish (possible) reservations on the logical drives connected to this
2624  * host
2625  **/
2626 static int
2627 megaraid_reset_handler(struct scsi_cmnd *scp)
2628 {
2629         adapter_t       *adapter;
2630         scb_t           *scb;
2631         scb_t           *tmp;
2632         mraid_device_t  *raid_dev;
2633         unsigned long   flags;
2634         uint8_t         raw_mbox[sizeof(mbox_t)];
2635         int             rval;
2636         int             recovery_window;
2637         int             recovering;
2638         int             i;
2639
2640         adapter         = SCP2ADAPTER(scp);
2641         raid_dev        = ADAP2RAIDDEV(adapter);
2642
2643         // return failure if adapter is not responding
2644         if (raid_dev->hw_error) {
2645                 con_log(CL_ANN, (KERN_NOTICE
2646                         "megaraid: hw error, cannot reset\n"));
2647                 return FAILED;
2648         }
2649
2650
2651         // Under exceptional conditions, FW can take up to 3 minutes to
2652         // complete command processing. Wait for additional 2 minutes for the
2653         // pending commands counter to go down to 0. If it doesn't, let the
2654         // controller be marked offline
2655         // Also, reset all the commands currently owned by the driver
2656         spin_lock_irqsave(PENDING_LIST_LOCK(adapter), flags);
2657         list_for_each_entry_safe(scb, tmp, &adapter->pend_list, list) {
2658
2659                 list_del_init(&scb->list);      // from pending list
2660
2661                 con_log(CL_ANN, (KERN_WARNING
2662                         "megaraid: %ld:%d[%d:%d], reset from pending list\n",
2663                                 scp->serial_number, scb->sno,
2664                                 scb->dev_channel, scb->dev_target));
2665
2666                 scp->result = (DID_RESET << 16);
2667                 scp->scsi_done(scp);
2668
2669                 megaraid_dealloc_scb(adapter, scb);
2670         }
2671         spin_unlock_irqrestore(PENDING_LIST_LOCK(adapter), flags);
2672
2673         if (adapter->outstanding_cmds) {
2674                 con_log(CL_ANN, (KERN_NOTICE
2675                         "megaraid: %d outstanding commands. Max wait %d sec\n",
2676                         adapter->outstanding_cmds, MBOX_RESET_WAIT));
2677         }
2678
2679         recovery_window = MBOX_RESET_WAIT + MBOX_RESET_EXT_WAIT;
2680
2681         recovering = adapter->outstanding_cmds;
2682
2683         for (i = 0; i < recovery_window && adapter->outstanding_cmds; i++) {
2684
2685                 megaraid_ack_sequence(adapter);
2686
2687                 // print a message once every 5 seconds only
2688                 if (!(i % 5)) {
2689                         con_log(CL_ANN, (
2690                         "megaraid mbox: Wait for %d commands to complete:%d\n",
2691                                 adapter->outstanding_cmds,
2692                                 MBOX_RESET_WAIT - i));
2693                 }
2694
2695                 // bailout if no recovery happended in reset time
2696                 if ((i == MBOX_RESET_WAIT) &&
2697                         (recovering == adapter->outstanding_cmds)) {
2698                         break;
2699                 }
2700
2701                 msleep(1000);
2702         }
2703
2704         spin_lock(&adapter->lock);
2705
2706         // If still outstanding commands, bail out
2707         if (adapter->outstanding_cmds) {
2708                 con_log(CL_ANN, (KERN_WARNING
2709                         "megaraid mbox: critical hardware error!\n"));
2710
2711                 raid_dev->hw_error = 1;
2712
2713                 rval = FAILED;
2714                 goto out;
2715         }
2716         else {
2717                 con_log(CL_ANN, (KERN_NOTICE
2718                 "megaraid mbox: reset sequence completed sucessfully\n"));
2719         }
2720
2721
2722         // If the controller supports clustering, reset reservations
2723         if (!adapter->ha) {
2724                 rval = SUCCESS;
2725                 goto out;
2726         }
2727
2728         // clear reservations if any
2729         raw_mbox[0] = CLUSTER_CMD;
2730         raw_mbox[2] = RESET_RESERVATIONS;
2731
2732         rval = SUCCESS;
2733         if (mbox_post_sync_cmd_fast(adapter, raw_mbox) == 0) {
2734                 con_log(CL_ANN,
2735                         (KERN_INFO "megaraid: reservation reset\n"));
2736         }
2737         else {
2738                 rval = FAILED;
2739                 con_log(CL_ANN, (KERN_WARNING
2740                                 "megaraid: reservation reset failed\n"));
2741         }
2742
2743  out:
2744         spin_unlock_irq(&adapter->lock);
2745         return rval;
2746 }
2747
2748 /*
2749  * START: internal commands library
2750  *
2751  * This section of the driver has the common routine used by the driver and
2752  * also has all the FW routines
2753  */
2754
2755 /**
2756  * mbox_post_sync_cmd() - blocking command to the mailbox based controllers
2757  * @adapter     - controller's soft state
2758  * @raw_mbox    - the mailbox
2759  *
2760  * Issue a scb in synchronous and non-interrupt mode for mailbox based
2761  * controllers
2762  */
2763 static int
2764 mbox_post_sync_cmd(adapter_t *adapter, uint8_t raw_mbox[])
2765 {
2766         mraid_device_t  *raid_dev = ADAP2RAIDDEV(adapter);
2767         mbox64_t        *mbox64;
2768         mbox_t          *mbox;
2769         uint8_t         status;
2770         int             i;
2771
2772
2773         mbox64  = raid_dev->mbox64;
2774         mbox    = raid_dev->mbox;
2775
2776         /*
2777          * Wait until mailbox is free
2778          */
2779         if (megaraid_busywait_mbox(raid_dev) != 0)
2780                 goto blocked_mailbox;
2781
2782         /*
2783          * Copy mailbox data into host structure
2784          */
2785         memcpy((caddr_t)mbox, (caddr_t)raw_mbox, 16);
2786         mbox->cmdid             = 0xFE;
2787         mbox->busy              = 1;
2788         mbox->poll              = 0;
2789         mbox->ack               = 0;
2790         mbox->numstatus         = 0xFF;
2791         mbox->status            = 0xFF;
2792
2793         wmb();
2794         WRINDOOR(raid_dev, raid_dev->mbox_dma | 0x1);
2795
2796         // wait for maximum 1 second for status to post. If the status is not
2797         // available within 1 second, assume FW is initializing and wait
2798         // for an extended amount of time
2799         if (mbox->numstatus == 0xFF) {  // status not yet available
2800                 udelay(25);;
2801
2802                 for (i = 0; mbox->numstatus == 0xFF && i < 1000; i++) {
2803                         rmb();
2804                         msleep(1);
2805                 }
2806
2807
2808                 if (i == 1000) {
2809                         con_log(CL_ANN, (KERN_NOTICE
2810                                 "megaraid mailbox: wait for FW to boot      "));
2811
2812                         for (i = 0; (mbox->numstatus == 0xFF) &&
2813                                         (i < MBOX_RESET_WAIT); i++) {
2814                                 rmb();
2815                                 con_log(CL_ANN, ("\b\b\b\b\b[%03d]",
2816                                                         MBOX_RESET_WAIT - i));
2817                                 msleep(1000);
2818                         }
2819
2820                         if (i == MBOX_RESET_WAIT) {
2821
2822                                 con_log(CL_ANN, (
2823                                 "\nmegaraid mailbox: status not available\n"));
2824
2825                                 return -1;
2826                         }
2827                         con_log(CL_ANN, ("\b\b\b\b\b[ok] \n"));
2828                 }
2829         }
2830
2831         // wait for maximum 1 second for poll semaphore
2832         if (mbox->poll != 0x77) {
2833                 udelay(25);
2834
2835                 for (i = 0; (mbox->poll != 0x77) && (i < 1000); i++) {
2836                         rmb();
2837                         msleep(1);
2838                 }
2839
2840                 if (i == 1000) {
2841                         con_log(CL_ANN, (KERN_WARNING
2842                         "megaraid mailbox: could not get poll semaphore\n"));
2843                         return -1;
2844                 }
2845         }
2846
2847         WRINDOOR(raid_dev, raid_dev->mbox_dma | 0x2);
2848         wmb();
2849
2850         // wait for maximum 1 second for acknowledgement
2851         if (RDINDOOR(raid_dev) & 0x2) {
2852                 udelay(25);
2853
2854                 for (i = 0; (RDINDOOR(raid_dev) & 0x2) && (i < 1000); i++) {
2855                         rmb();
2856                         msleep(1);
2857                 }
2858
2859                 if (i == 1000) {
2860                         con_log(CL_ANN, (KERN_WARNING
2861                                 "megaraid mailbox: could not acknowledge\n"));
2862                         return -1;
2863                 }
2864         }
2865         mbox->poll      = 0;
2866         mbox->ack       = 0x77;
2867
2868         status = mbox->status;
2869
2870         // invalidate the completed command id array. After command
2871         // completion, firmware would write the valid id.
2872         mbox->numstatus = 0xFF;
2873         mbox->status    = 0xFF;
2874         for (i = 0; i < MBOX_MAX_FIRMWARE_STATUS; i++) {
2875                 mbox->completed[i] = 0xFF;
2876         }
2877
2878         return status;
2879
2880 blocked_mailbox:
2881
2882         con_log(CL_ANN, (KERN_WARNING "megaraid: blocked mailbox\n") );
2883         return -1;
2884 }
2885
2886
2887 /**
2888  * mbox_post_sync_cmd_fast - blocking command to the mailbox based controllers
2889  * @adapter     - controller's soft state
2890  * @raw_mbox    - the mailbox
2891  *
2892  * Issue a scb in synchronous and non-interrupt mode for mailbox based
2893  * controllers. This is a faster version of the synchronous command and
2894  * therefore can be called in interrupt-context as well
2895  */
2896 static int
2897 mbox_post_sync_cmd_fast(adapter_t *adapter, uint8_t raw_mbox[])
2898 {
2899         mraid_device_t  *raid_dev = ADAP2RAIDDEV(adapter);
2900         mbox_t          *mbox;
2901         long            i;
2902
2903
2904         mbox    = raid_dev->mbox;
2905
2906         // return immediately if the mailbox is busy
2907         if (mbox->busy) return -1;
2908
2909         // Copy mailbox data into host structure
2910         memcpy((caddr_t)mbox, (caddr_t)raw_mbox, 14);
2911         mbox->cmdid             = 0xFE;
2912         mbox->busy              = 1;
2913         mbox->poll              = 0;
2914         mbox->ack               = 0;
2915         mbox->numstatus         = 0xFF;
2916         mbox->status            = 0xFF;
2917
2918         wmb();
2919         WRINDOOR(raid_dev, raid_dev->mbox_dma | 0x1);
2920
2921         for (i = 0; i < 0xFFFFF; i++) {
2922                 if (mbox->numstatus != 0xFF) break;
2923                 rmb();
2924         }
2925
2926         if (i == 0xFFFFF) {
2927                 // We may need to re-calibrate the counter
2928                 con_log(CL_ANN, (KERN_CRIT
2929                         "megaraid: fast sync command timed out\n"));
2930         }
2931
2932         WRINDOOR(raid_dev, raid_dev->mbox_dma | 0x2);
2933         wmb();
2934
2935         return mbox->status;
2936 }
2937
2938
2939 /**
2940  * megaraid_busywait_mbox() - Wait until the controller's mailbox is available
2941  * @raid_dev    - RAID device (HBA) soft state
2942  *
2943  * wait until the controller's mailbox is available to accept more commands.
2944  * wait for at most 1 second
2945  */
2946 static int
2947 megaraid_busywait_mbox(mraid_device_t *raid_dev)
2948 {
2949         mbox_t  *mbox = raid_dev->mbox;
2950         int     i = 0;
2951
2952         if (mbox->busy) {
2953                 udelay(25);
2954                 for (i = 0; mbox->busy && i < 1000; i++)
2955                         msleep(1);
2956         }
2957
2958         if (i < 1000) return 0;
2959         else return -1;
2960 }
2961
2962
2963 /**
2964  * megaraid_mbox_product_info - some static information about the controller
2965  * @adapter     - our soft state
2966  *
2967  * issue commands to the controller to grab some parameters required by our
2968  * caller.
2969  */
2970 static int
2971 megaraid_mbox_product_info(adapter_t *adapter)
2972 {
2973         mraid_device_t          *raid_dev = ADAP2RAIDDEV(adapter);
2974         mbox_t                  *mbox;
2975         uint8_t                 raw_mbox[sizeof(mbox_t)];
2976         mraid_pinfo_t           *pinfo;
2977         dma_addr_t              pinfo_dma_h;
2978         mraid_inquiry3_t        *mraid_inq3;
2979         int                     i;
2980
2981
2982         memset((caddr_t)raw_mbox, 0, sizeof(raw_mbox));
2983         mbox = (mbox_t *)raw_mbox;
2984
2985         /*
2986          * Issue an ENQUIRY3 command to find out certain adapter parameters,
2987          * e.g., max channels, max commands etc.
2988          */
2989         pinfo = pci_alloc_consistent(adapter->pdev, sizeof(mraid_pinfo_t),
2990                         &pinfo_dma_h);
2991
2992         if (pinfo == NULL) {
2993                 con_log(CL_ANN, (KERN_WARNING
2994                         "megaraid: out of memory, %s %d\n", __FUNCTION__,
2995                         __LINE__));
2996
2997                 return -1;
2998         }
2999         memset(pinfo, 0, sizeof(mraid_pinfo_t));
3000
3001         mbox->xferaddr = (uint32_t)adapter->ibuf_dma_h;
3002         memset((void *)adapter->ibuf, 0, MBOX_IBUF_SIZE);
3003
3004         raw_mbox[0] = FC_NEW_CONFIG;
3005         raw_mbox[2] = NC_SUBOP_ENQUIRY3;
3006         raw_mbox[3] = ENQ3_GET_SOLICITED_FULL;
3007
3008         // Issue the command
3009         if (mbox_post_sync_cmd(adapter, raw_mbox) != 0) {
3010
3011                 con_log(CL_ANN, (KERN_WARNING "megaraid: Inquiry3 failed\n"));
3012
3013                 pci_free_consistent(adapter->pdev, sizeof(mraid_pinfo_t),
3014                         pinfo, pinfo_dma_h);
3015
3016                 return -1;
3017         }
3018
3019         /*
3020          * Collect information about state of each physical drive
3021          * attached to the controller. We will expose all the disks
3022          * which are not part of RAID
3023          */
3024         mraid_inq3 = (mraid_inquiry3_t *)adapter->ibuf;
3025         for (i = 0; i < MBOX_MAX_PHYSICAL_DRIVES; i++) {
3026                 raid_dev->pdrv_state[i] = mraid_inq3->pdrv_state[i];
3027         }
3028
3029         /*
3030          * Get product info for information like number of channels,
3031          * maximum commands supported.
3032          */
3033         memset((caddr_t)raw_mbox, 0, sizeof(raw_mbox));
3034         mbox->xferaddr = (uint32_t)pinfo_dma_h;
3035
3036         raw_mbox[0] = FC_NEW_CONFIG;
3037         raw_mbox[2] = NC_SUBOP_PRODUCT_INFO;
3038
3039         if (mbox_post_sync_cmd(adapter, raw_mbox) != 0) {
3040
3041                 con_log(CL_ANN, (KERN_WARNING
3042                         "megaraid: product info failed\n"));
3043
3044                 pci_free_consistent(adapter->pdev, sizeof(mraid_pinfo_t),
3045                         pinfo, pinfo_dma_h);
3046
3047                 return -1;
3048         }
3049
3050         /*
3051          * Setup some parameters for host, as required by our caller
3052          */
3053         adapter->max_channel = pinfo->nchannels;
3054
3055         /*
3056          * we will export all the logical drives on a single channel.
3057          * Add 1 since inquires do not come for inititor ID
3058          */
3059         adapter->max_target     = MAX_LOGICAL_DRIVES_40LD + 1;
3060         adapter->max_lun        = 8;    // up to 8 LUNs for non-disk devices
3061
3062         /*
3063          * These are the maximum outstanding commands for the scsi-layer
3064          */
3065         adapter->max_cmds       = MBOX_MAX_SCSI_CMDS;
3066
3067         memset(adapter->fw_version, 0, VERSION_SIZE);
3068         memset(adapter->bios_version, 0, VERSION_SIZE);
3069
3070         memcpy(adapter->fw_version, pinfo->fw_version, 4);
3071         adapter->fw_version[4] = 0;
3072
3073         memcpy(adapter->bios_version, pinfo->bios_version, 4);
3074         adapter->bios_version[4] = 0;
3075
3076         con_log(CL_ANN, (KERN_NOTICE
3077                 "megaraid: fw version:[%s] bios version:[%s]\n",
3078                 adapter->fw_version, adapter->bios_version));
3079
3080         pci_free_consistent(adapter->pdev, sizeof(mraid_pinfo_t), pinfo,
3081                         pinfo_dma_h);
3082
3083         return 0;
3084 }
3085
3086
3087
3088 /**
3089  * megaraid_mbox_extended_cdb - check for support for extended CDBs
3090  * @adapter     - soft state for the controller
3091  *
3092  * this routine check whether the controller in question supports extended
3093  * ( > 10 bytes ) CDBs
3094  */
3095 static int
3096 megaraid_mbox_extended_cdb(adapter_t *adapter)
3097 {
3098         mbox_t          *mbox;
3099         uint8_t         raw_mbox[sizeof(mbox_t)];
3100         int             rval;
3101
3102         mbox = (mbox_t *)raw_mbox;
3103
3104         memset((caddr_t)raw_mbox, 0, sizeof(raw_mbox));
3105         mbox->xferaddr  = (uint32_t)adapter->ibuf_dma_h;
3106
3107         memset((void *)adapter->ibuf, 0, MBOX_IBUF_SIZE);
3108
3109         raw_mbox[0] = MAIN_MISC_OPCODE;
3110         raw_mbox[2] = SUPPORT_EXT_CDB;
3111
3112         /*
3113          * Issue the command
3114          */
3115         rval = 0;
3116         if (mbox_post_sync_cmd(adapter, raw_mbox) != 0) {
3117                 rval = -1;
3118         }
3119
3120         return rval;
3121 }
3122
3123
3124 /**
3125  * megaraid_mbox_support_ha - Do we support clustering
3126  * @adapter     - soft state for the controller
3127  * @init_id     - ID of the initiator
3128  *
3129  * Determine if the firmware supports clustering and the ID of the initiator.
3130  */
3131 static int
3132 megaraid_mbox_support_ha(adapter_t *adapter, uint16_t *init_id)
3133 {
3134         mbox_t          *mbox;
3135         uint8_t         raw_mbox[sizeof(mbox_t)];
3136         int             rval;
3137
3138
3139         mbox = (mbox_t *)raw_mbox;
3140
3141         memset((caddr_t)raw_mbox, 0, sizeof(raw_mbox));
3142
3143         mbox->xferaddr = (uint32_t)adapter->ibuf_dma_h;
3144
3145         memset((void *)adapter->ibuf, 0, MBOX_IBUF_SIZE);
3146
3147         raw_mbox[0] = GET_TARGET_ID;
3148
3149         // Issue the command
3150         *init_id = 7;
3151         rval =  -1;
3152         if (mbox_post_sync_cmd(adapter, raw_mbox) == 0) {
3153
3154                 *init_id = *(uint8_t *)adapter->ibuf;
3155
3156                 con_log(CL_ANN, (KERN_INFO
3157                         "megaraid: cluster firmware, initiator ID: %d\n",
3158                         *init_id));
3159
3160                 rval =  0;
3161         }
3162
3163         return rval;
3164 }
3165
3166
3167 /**
3168  * megaraid_mbox_support_random_del - Do we support random deletion
3169  * @adapter     - soft state for the controller
3170  *
3171  * Determine if the firmware supports random deletion
3172  * Return:      1 is operation supported, 0 otherwise
3173  */
3174 static int
3175 megaraid_mbox_support_random_del(adapter_t *adapter)
3176 {
3177         mbox_t          *mbox;
3178         uint8_t         raw_mbox[sizeof(mbox_t)];
3179         int             rval;
3180
3181
3182         mbox = (mbox_t *)raw_mbox;
3183
3184         memset((caddr_t)raw_mbox, 0, sizeof(mbox_t));
3185
3186         raw_mbox[0] = FC_DEL_LOGDRV;
3187         raw_mbox[2] = OP_SUP_DEL_LOGDRV;
3188
3189         // Issue the command
3190         rval = 0;
3191         if (mbox_post_sync_cmd(adapter, raw_mbox) == 0) {
3192
3193                 con_log(CL_DLEVEL1, ("megaraid: supports random deletion\n"));
3194
3195                 rval =  1;
3196         }
3197
3198         return rval;
3199 }
3200
3201
3202 /**
3203  * megaraid_mbox_get_max_sg - maximum sg elements supported by the firmware
3204  * @adapter     - soft state for the controller
3205  *
3206  * Find out the maximum number of scatter-gather elements supported by the
3207  * firmware
3208  */
3209 static int
3210 megaraid_mbox_get_max_sg(adapter_t *adapter)
3211 {
3212         mbox_t          *mbox;
3213         uint8_t         raw_mbox[sizeof(mbox_t)];
3214         int             nsg;
3215
3216
3217         mbox = (mbox_t *)raw_mbox;
3218
3219         memset((caddr_t)raw_mbox, 0, sizeof(mbox_t));
3220
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] = GET_MAX_SG_SUPPORT;
3227
3228         // Issue the command
3229         if (mbox_post_sync_cmd(adapter, raw_mbox) == 0) {
3230                 nsg =  *(uint8_t *)adapter->ibuf;
3231         }
3232         else {
3233                 nsg =  MBOX_DEFAULT_SG_SIZE;
3234         }
3235
3236         if (nsg > MBOX_MAX_SG_SIZE) nsg = MBOX_MAX_SG_SIZE;
3237
3238         return nsg;
3239 }
3240
3241
3242 /**
3243  * megaraid_mbox_enum_raid_scsi - enumerate the RAID and SCSI channels
3244  * @adapter     - soft state for the controller
3245  *
3246  * Enumerate the RAID and SCSI channels for ROMB platoforms so that channels
3247  * can be exported as regular SCSI channels
3248  */
3249 static void
3250 megaraid_mbox_enum_raid_scsi(adapter_t *adapter)
3251 {
3252         mraid_device_t  *raid_dev = ADAP2RAIDDEV(adapter);
3253         mbox_t          *mbox;
3254         uint8_t         raw_mbox[sizeof(mbox_t)];
3255
3256
3257         mbox = (mbox_t *)raw_mbox;
3258
3259         memset((caddr_t)raw_mbox, 0, sizeof(mbox_t));
3260
3261         mbox->xferaddr = (uint32_t)adapter->ibuf_dma_h;
3262
3263         memset((void *)adapter->ibuf, 0, MBOX_IBUF_SIZE);
3264
3265         raw_mbox[0] = CHNL_CLASS;
3266         raw_mbox[2] = GET_CHNL_CLASS;
3267
3268         // Issue the command. If the command fails, all channels are RAID
3269         // channels
3270         raid_dev->channel_class = 0xFF;
3271         if (mbox_post_sync_cmd(adapter, raw_mbox) == 0) {
3272                 raid_dev->channel_class =  *(uint8_t *)adapter->ibuf;
3273         }
3274
3275         return;
3276 }
3277
3278
3279 /**
3280  * megaraid_mbox_flush_cache - flush adapter and disks cache
3281  * @param adapter       : soft state for the controller
3282  *
3283  * Flush adapter cache followed by disks cache
3284  */
3285 static void
3286 megaraid_mbox_flush_cache(adapter_t *adapter)
3287 {
3288         mbox_t  *mbox;
3289         uint8_t raw_mbox[sizeof(mbox_t)];
3290
3291
3292         mbox = (mbox_t *)raw_mbox;
3293
3294         memset((caddr_t)raw_mbox, 0, sizeof(mbox_t));
3295
3296         raw_mbox[0] = FLUSH_ADAPTER;
3297
3298         if (mbox_post_sync_cmd(adapter, raw_mbox) != 0) {
3299                 con_log(CL_ANN, ("megaraid: flush adapter failed\n"));
3300         }
3301
3302         raw_mbox[0] = FLUSH_SYSTEM;
3303
3304         if (mbox_post_sync_cmd(adapter, raw_mbox) != 0) {
3305                 con_log(CL_ANN, ("megaraid: flush disks cache failed\n"));
3306         }
3307
3308         return;
3309 }
3310
3311
3312 /**
3313  * megaraid_mbox_display_scb - display SCB information, mostly debug purposes
3314  * @param adapter       : controllers' soft state
3315  * @param scb           : SCB to be displayed
3316  * @param level : debug level for console print
3317  *
3318  * Diplay information about the given SCB iff the current debug level is
3319  * verbose
3320  */
3321 static void
3322 megaraid_mbox_display_scb(adapter_t *adapter, scb_t *scb)
3323 {
3324         mbox_ccb_t              *ccb;
3325         struct scsi_cmnd        *scp;
3326         mbox_t                  *mbox;
3327         int                     level;
3328         int                     i;
3329
3330
3331         ccb     = (mbox_ccb_t *)scb->ccb;
3332         scp     = scb->scp;
3333         mbox    = ccb->mbox;
3334
3335         level = CL_DLEVEL3;
3336
3337         con_log(level, (KERN_NOTICE
3338                 "megaraid mailbox: status:%#x cmd:%#x id:%#x ", scb->status,
3339                 mbox->cmd, scb->sno));
3340
3341         con_log(level, ("sec:%#x lba:%#x addr:%#x ld:%d sg:%d\n",
3342                 mbox->numsectors, mbox->lba, mbox->xferaddr, mbox->logdrv,
3343                 mbox->numsge));
3344
3345         if (!scp) return;
3346
3347         con_log(level, (KERN_NOTICE "scsi cmnd: "));
3348
3349         for (i = 0; i < scp->cmd_len; i++) {
3350                 con_log(level, ("%#2.02x ", scp->cmnd[i]));
3351         }
3352
3353         con_log(level, ("\n"));
3354
3355         return;
3356 }
3357
3358
3359 /**
3360  * megaraid_mbox_setup_device_map - manage device ids
3361  * @adapter     : Driver's soft state
3362  *
3363  * Manange the device ids to have an appropraite mapping between the kernel
3364  * scsi addresses and megaraid scsi and logical drive addresses. We export
3365  * scsi devices on their actual addresses, whereas the logical drives are
3366  * exported on a virtual scsi channel.
3367  **/
3368 static void
3369 megaraid_mbox_setup_device_map(adapter_t *adapter)
3370 {
3371         uint8_t         c;
3372         uint8_t         t;
3373
3374         /*
3375          * First fill the values on the logical drive channel
3376          */
3377         for (t = 0; t < LSI_MAX_LOGICAL_DRIVES_64LD; t++)
3378                 adapter->device_ids[adapter->max_channel][t] =
3379                         (t < adapter->init_id) ?  t : t - 1;
3380
3381         adapter->device_ids[adapter->max_channel][adapter->init_id] = 0xFF;
3382
3383         /*
3384          * Fill the values on the physical devices channels
3385          */
3386         for (c = 0; c < adapter->max_channel; c++)
3387                 for (t = 0; t < LSI_MAX_LOGICAL_DRIVES_64LD; t++)
3388                         adapter->device_ids[c][t] = (c << 8) | t;
3389 }
3390
3391
3392 /*
3393  * END: internal commands library
3394  */
3395
3396 /*
3397  * START: Interface for the common management module
3398  *
3399  * This is the module, which interfaces with the common mangement module to
3400  * provide support for ioctl and sysfs
3401  */
3402
3403 /**
3404  * megaraid_cmm_register - register with the mangement module
3405  * @param adapter       : HBA soft state
3406  *
3407  * Register with the management module, which allows applications to issue
3408  * ioctl calls to the drivers. This interface is used by the management module
3409  * to setup sysfs support as well.
3410  */
3411 static int
3412 megaraid_cmm_register(adapter_t *adapter)
3413 {
3414         mraid_device_t  *raid_dev = ADAP2RAIDDEV(adapter);
3415         mraid_mmadp_t   adp;
3416         scb_t           *scb;
3417         mbox_ccb_t      *ccb;
3418         int             rval;
3419         int             i;
3420
3421         // Allocate memory for the base list of scb for management module.
3422         adapter->uscb_list = kmalloc(sizeof(scb_t) * MBOX_MAX_USER_CMDS,
3423                         GFP_KERNEL);
3424
3425         if (adapter->uscb_list == NULL) {
3426                 con_log(CL_ANN, (KERN_WARNING
3427                         "megaraid: out of memory, %s %d\n", __FUNCTION__,
3428                         __LINE__));
3429                 return -1;
3430         }
3431         memset(adapter->uscb_list, 0, sizeof(scb_t) * MBOX_MAX_USER_CMDS);
3432
3433
3434         // Initialize the synchronization parameters for resources for
3435         // commands for management module
3436         INIT_LIST_HEAD(&adapter->uscb_pool);
3437
3438         spin_lock_init(USER_FREE_LIST_LOCK(adapter));
3439
3440
3441
3442         // link all the packets. Note, CCB for commands, coming from the
3443         // commom management module, mailbox physical address are already
3444         // setup by it. We just need placeholder for that in our local command
3445         // control blocks
3446         for (i = 0; i < MBOX_MAX_USER_CMDS; i++) {
3447
3448                 scb                     = adapter->uscb_list + i;
3449                 ccb                     = raid_dev->uccb_list + i;
3450
3451                 scb->ccb                = (caddr_t)ccb;
3452                 ccb->mbox64             = raid_dev->umbox64 + i;
3453                 ccb->mbox               = &ccb->mbox64->mbox32;
3454                 ccb->raw_mbox           = (uint8_t *)ccb->mbox;
3455
3456                 scb->gp                 = 0;
3457
3458                 // COMMAND ID 0 - (MBOX_MAX_SCSI_CMDS-1) ARE RESERVED FOR
3459                 // COMMANDS COMING FROM IO SUBSYSTEM (MID-LAYER)
3460                 scb->sno                = i + MBOX_MAX_SCSI_CMDS;
3461
3462                 scb->scp                = NULL;
3463                 scb->state              = SCB_FREE;
3464                 scb->dma_direction      = PCI_DMA_NONE;
3465                 scb->dma_type           = MRAID_DMA_NONE;
3466                 scb->dev_channel        = -1;
3467                 scb->dev_target         = -1;
3468
3469                 // put scb in the free pool
3470                 list_add_tail(&scb->list, &adapter->uscb_pool);
3471         }
3472
3473         adp.unique_id           = adapter->unique_id;
3474         adp.drvr_type           = DRVRTYPE_MBOX;
3475         adp.drvr_data           = (unsigned long)adapter;
3476         adp.pdev                = adapter->pdev;
3477         adp.issue_uioc          = megaraid_mbox_mm_handler;
3478         adp.timeout             = 300;
3479         adp.max_kioc            = MBOX_MAX_USER_CMDS;
3480
3481         if ((rval = mraid_mm_register_adp(&adp)) != 0) {
3482
3483                 con_log(CL_ANN, (KERN_WARNING
3484                         "megaraid mbox: did not register with CMM\n"));
3485
3486                 kfree(adapter->uscb_list);
3487         }
3488
3489         return rval;
3490 }
3491
3492
3493 /**
3494  * megaraid_cmm_unregister - un-register with the mangement module
3495  * @param adapter       : HBA soft state
3496  *
3497  * Un-register with the management module.
3498  * FIXME: mgmt module must return failure for unregister if it has pending
3499  * commands in LLD
3500  */
3501 static int
3502 megaraid_cmm_unregister(adapter_t *adapter)
3503 {
3504         kfree(adapter->uscb_list);
3505         mraid_mm_unregister_adp(adapter->unique_id);
3506         return 0;
3507 }
3508
3509
3510 /**
3511  * megaraid_mbox_mm_handler - interface for CMM to issue commands to LLD
3512  * @param drvr_data     : LLD specific data
3513  * @param kioc          : CMM interface packet
3514  * @param action        : command action
3515  *
3516  * This routine is invoked whenever the Common Mangement Module (CMM) has a
3517  * command for us. The 'action' parameter specifies if this is a new command
3518  * or otherwise.
3519  */
3520 static int
3521 megaraid_mbox_mm_handler(unsigned long drvr_data, uioc_t *kioc, uint32_t action)
3522 {
3523         adapter_t *adapter;
3524
3525         if (action != IOCTL_ISSUE) {
3526                 con_log(CL_ANN, (KERN_WARNING
3527                         "megaraid: unsupported management action:%#2x\n",
3528                         action));
3529                 return (-ENOTSUPP);
3530         }
3531
3532         adapter = (adapter_t *)drvr_data;
3533
3534         // make sure this adapter is not being detached right now.
3535         if (atomic_read(&adapter->being_detached)) {
3536                 con_log(CL_ANN, (KERN_WARNING
3537                         "megaraid: reject management request, detaching\n"));
3538                 return (-ENODEV);
3539         }
3540
3541         switch (kioc->opcode) {
3542
3543         case GET_ADAP_INFO:
3544
3545                 kioc->status =  gather_hbainfo(adapter, (mraid_hba_info_t *)
3546                                         (unsigned long)kioc->buf_vaddr);
3547
3548                 kioc->done(kioc);
3549
3550                 return kioc->status;
3551
3552         case MBOX_CMD:
3553
3554                 return megaraid_mbox_mm_command(adapter, kioc);
3555
3556         default:
3557                 kioc->status = (-EINVAL);
3558                 kioc->done(kioc);
3559                 return (-EINVAL);
3560         }
3561
3562         return 0;       // not reached
3563 }
3564
3565 /**
3566  * megaraid_mbox_mm_command - issues commands routed through CMM
3567  * @param adapter       : HBA soft state
3568  * @param kioc          : management command packet
3569  *
3570  * Issues commands, which are routed through the management module.
3571  */
3572 static int
3573 megaraid_mbox_mm_command(adapter_t *adapter, uioc_t *kioc)
3574 {
3575         struct list_head        *head = &adapter->uscb_pool;
3576         mbox64_t                *mbox64;
3577         uint8_t                 *raw_mbox;
3578         scb_t                   *scb;
3579         mbox_ccb_t              *ccb;
3580         unsigned long           flags;
3581
3582         // detach one scb from free pool
3583         spin_lock_irqsave(USER_FREE_LIST_LOCK(adapter), flags);
3584
3585         if (list_empty(head)) { // should never happen because of CMM
3586
3587                 con_log(CL_ANN, (KERN_WARNING
3588                         "megaraid mbox: bug in cmm handler, lost resources\n"));
3589
3590                 spin_unlock_irqrestore(USER_FREE_LIST_LOCK(adapter), flags);
3591
3592                 return (-EINVAL);
3593         }
3594
3595         scb = list_entry(head->next, scb_t, list);
3596         list_del_init(&scb->list);
3597
3598         spin_unlock_irqrestore(USER_FREE_LIST_LOCK(adapter), flags);
3599
3600         scb->state              = SCB_ACTIVE;
3601         scb->dma_type           = MRAID_DMA_NONE;
3602         scb->dma_direction      = PCI_DMA_NONE;
3603
3604         ccb             = (mbox_ccb_t *)scb->ccb;
3605         mbox64          = (mbox64_t *)(unsigned long)kioc->cmdbuf;
3606         raw_mbox        = (uint8_t *)&mbox64->mbox32;
3607
3608         memcpy(ccb->mbox64, mbox64, sizeof(mbox64_t));
3609
3610         scb->gp         = (unsigned long)kioc;
3611
3612         /*
3613          * If it is a logdrv random delete operation, we have to wait till
3614          * there are no outstanding cmds at the fw and then issue it directly
3615          */
3616         if (raw_mbox[0] == FC_DEL_LOGDRV && raw_mbox[2] == OP_DEL_LOGDRV) {
3617
3618                 if (wait_till_fw_empty(adapter)) {
3619                         con_log(CL_ANN, (KERN_NOTICE
3620                                 "megaraid mbox: LD delete, timed out\n"));
3621
3622                         kioc->status = -ETIME;
3623
3624                         scb->status = -1;
3625
3626                         megaraid_mbox_mm_done(adapter, scb);
3627
3628                         return (-ETIME);
3629                 }
3630
3631                 INIT_LIST_HEAD(&scb->list);
3632
3633                 scb->state = SCB_ISSUED;
3634                 if (mbox_post_cmd(adapter, scb) != 0) {
3635
3636                         con_log(CL_ANN, (KERN_NOTICE
3637                                 "megaraid mbox: LD delete, mailbox busy\n"));
3638
3639                         kioc->status = -EBUSY;
3640
3641                         scb->status = -1;
3642
3643                         megaraid_mbox_mm_done(adapter, scb);
3644
3645                         return (-EBUSY);
3646                 }
3647
3648                 return 0;
3649         }
3650
3651         // put the command on the pending list and execute
3652         megaraid_mbox_runpendq(adapter, scb);
3653
3654         return 0;
3655 }
3656
3657
3658 static int
3659 wait_till_fw_empty(adapter_t *adapter)
3660 {
3661         unsigned long   flags = 0;
3662         int             i;
3663
3664
3665         /*
3666          * Set the quiescent flag to stop issuing cmds to FW.
3667          */
3668         spin_lock_irqsave(&adapter->lock, flags);
3669         adapter->quiescent++;
3670         spin_unlock_irqrestore(&adapter->lock, flags);
3671
3672         /*
3673          * Wait till there are no more cmds outstanding at FW. Try for at most
3674          * 60 seconds
3675          */
3676         for (i = 0; i < 60 && adapter->outstanding_cmds; i++) {
3677                 con_log(CL_DLEVEL1, (KERN_INFO
3678                         "megaraid: FW has %d pending commands\n",
3679                         adapter->outstanding_cmds));
3680
3681                 msleep(1000);
3682         }
3683
3684         return adapter->outstanding_cmds;
3685 }
3686
3687
3688 /**
3689  * megaraid_mbox_mm_done - callback for CMM commands
3690  * @adapter     : HBA soft state
3691  * @scb         : completed command
3692  *
3693  * Callback routine for internal commands originated from the management
3694  * module.
3695  */
3696 static void
3697 megaraid_mbox_mm_done(adapter_t *adapter, scb_t *scb)
3698 {
3699         uioc_t                  *kioc;
3700         mbox64_t                *mbox64;
3701         uint8_t                 *raw_mbox;
3702         unsigned long           flags;
3703
3704         kioc                    = (uioc_t *)scb->gp;
3705         kioc->status            = 0;
3706         mbox64                  = (mbox64_t *)(unsigned long)kioc->cmdbuf;
3707         mbox64->mbox32.status   = scb->status;
3708         raw_mbox                = (uint8_t *)&mbox64->mbox32;
3709
3710
3711         // put scb in the free pool
3712         scb->state      = SCB_FREE;
3713         scb->scp        = NULL;
3714
3715         spin_lock_irqsave(USER_FREE_LIST_LOCK(adapter), flags);
3716
3717         list_add(&scb->list, &adapter->uscb_pool);
3718
3719         spin_unlock_irqrestore(USER_FREE_LIST_LOCK(adapter), flags);
3720
3721         // if a delete logical drive operation succeeded, restart the
3722         // controller
3723         if (raw_mbox[0] == FC_DEL_LOGDRV && raw_mbox[2] == OP_DEL_LOGDRV) {
3724
3725                 adapter->quiescent--;
3726
3727                 megaraid_mbox_runpendq(adapter, NULL);
3728         }
3729
3730         kioc->done(kioc);
3731
3732         return;
3733 }
3734
3735
3736 /**
3737  * gather_hbainfo - HBA characteristics for the applications
3738  * @param adapter       : HBA soft state
3739  * @param hinfo         : pointer to the caller's host info strucuture
3740  */
3741 static int
3742 gather_hbainfo(adapter_t *adapter, mraid_hba_info_t *hinfo)
3743 {
3744         uint8_t dmajor;
3745
3746         dmajor                  = megaraid_mbox_version[0];
3747
3748         hinfo->pci_vendor_id    = adapter->pdev->vendor;
3749         hinfo->pci_device_id    = adapter->pdev->device;
3750         hinfo->subsys_vendor_id = adapter->pdev->subsystem_vendor;
3751         hinfo->subsys_device_id = adapter->pdev->subsystem_device;
3752
3753         hinfo->pci_bus          = adapter->pdev->bus->number;
3754         hinfo->pci_dev_fn       = adapter->pdev->devfn;
3755         hinfo->pci_slot         = PCI_SLOT(adapter->pdev->devfn);
3756         hinfo->irq              = adapter->host->irq;
3757         hinfo->baseport         = ADAP2RAIDDEV(adapter)->baseport;
3758
3759         hinfo->unique_id        = (hinfo->pci_bus << 8) | adapter->pdev->devfn;
3760         hinfo->host_no          = adapter->host->host_no;
3761
3762         return 0;
3763 }
3764
3765 /*
3766  * END: Interface for the common management module
3767  */
3768
3769
3770
3771 /**
3772  * megaraid_sysfs_alloc_resources - allocate sysfs related resources
3773  *
3774  * Allocate packets required to issue FW calls whenever the sysfs attributes
3775  * are read. These attributes would require up-to-date information from the
3776  * FW. Also set up resources for mutual exclusion to share these resources and
3777  * the wait queue.
3778  *
3779  * @param adapter : controller's soft state
3780  *
3781  * @return 0 on success
3782  * @return -ERROR_CODE on failure
3783  */
3784 static int
3785 megaraid_sysfs_alloc_resources(adapter_t *adapter)
3786 {
3787         mraid_device_t  *raid_dev = ADAP2RAIDDEV(adapter);
3788         int             rval = 0;
3789
3790         raid_dev->sysfs_uioc = kmalloc(sizeof(uioc_t), GFP_KERNEL);
3791
3792         raid_dev->sysfs_mbox64 = kmalloc(sizeof(mbox64_t), GFP_KERNEL);
3793
3794         raid_dev->sysfs_buffer = pci_alloc_consistent(adapter->pdev,
3795                         PAGE_SIZE, &raid_dev->sysfs_buffer_dma);
3796
3797         if (!raid_dev->sysfs_uioc || !raid_dev->sysfs_mbox64 ||
3798                 !raid_dev->sysfs_buffer) {
3799
3800                 con_log(CL_ANN, (KERN_WARNING
3801                         "megaraid: out of memory, %s %d\n", __FUNCTION__,
3802                         __LINE__));
3803
3804                 rval = -ENOMEM;
3805
3806                 megaraid_sysfs_free_resources(adapter);
3807         }
3808
3809         sema_init(&raid_dev->sysfs_sem, 1);
3810
3811         init_waitqueue_head(&raid_dev->sysfs_wait_q);
3812
3813         return rval;
3814 }
3815
3816
3817 /**
3818  * megaraid_sysfs_free_resources - free sysfs related resources
3819  *
3820  * Free packets allocated for sysfs FW commands
3821  *
3822  * @param adapter : controller's soft state
3823  */
3824 static void
3825 megaraid_sysfs_free_resources(adapter_t *adapter)
3826 {
3827         mraid_device_t  *raid_dev = ADAP2RAIDDEV(adapter);
3828
3829         kfree(raid_dev->sysfs_uioc);
3830         kfree(raid_dev->sysfs_mbox64);
3831
3832         if (raid_dev->sysfs_buffer) {
3833                 pci_free_consistent(adapter->pdev, PAGE_SIZE,
3834                         raid_dev->sysfs_buffer, raid_dev->sysfs_buffer_dma);
3835         }
3836 }
3837
3838
3839 /**
3840  * megaraid_sysfs_get_ldmap_done - callback for get ldmap
3841  *
3842  * Callback routine called in the ISR/tasklet context for get ldmap call
3843  *
3844  * @param uioc : completed packet
3845  */
3846 static void
3847 megaraid_sysfs_get_ldmap_done(uioc_t *uioc)
3848 {
3849         adapter_t       *adapter = (adapter_t *)uioc->buf_vaddr;
3850         mraid_device_t  *raid_dev = ADAP2RAIDDEV(adapter);
3851
3852         uioc->status = 0;
3853
3854         wake_up(&raid_dev->sysfs_wait_q);
3855 }
3856
3857
3858 /**
3859  * megaraid_sysfs_get_ldmap_timeout - timeout handling for get ldmap
3860  *
3861  * Timeout routine to recover and return to application, in case the adapter
3862  * has stopped responding. A timeout of 60 seconds for this command seem like
3863  * a good value
3864  *
3865  * @param uioc : timed out packet
3866  */
3867 static void
3868 megaraid_sysfs_get_ldmap_timeout(unsigned long data)
3869 {
3870         uioc_t          *uioc = (uioc_t *)data;
3871         adapter_t       *adapter = (adapter_t *)uioc->buf_vaddr;
3872         mraid_device_t  *raid_dev = ADAP2RAIDDEV(adapter);
3873
3874         uioc->status = -ETIME;
3875
3876         wake_up(&raid_dev->sysfs_wait_q);
3877 }
3878
3879
3880 /**
3881  * megaraid_sysfs_get_ldmap - get update logical drive map
3882  *
3883  * This routine will be called whenever user reads the logical drive
3884  * attributes, go get the current logical drive mapping table from the
3885  * firmware. We use the managment API's to issue commands to the controller.
3886  *
3887  * NOTE: The commands issuance functionality is not generalized and
3888  * implemented in context of "get ld map" command only. If required, the
3889  * command issuance logical can be trivially pulled out and implemented as a
3890  * standalone libary. For now, this should suffice since there is no other
3891  * user of this interface.
3892  *
3893  * @param adapter : controller's soft state
3894  *
3895  * @return 0 on success
3896  * @return -1 on failure
3897  */
3898 static int
3899 megaraid_sysfs_get_ldmap(adapter_t *adapter)
3900 {
3901         mraid_device_t          *raid_dev = ADAP2RAIDDEV(adapter);
3902         uioc_t                  *uioc;
3903         mbox64_t                *mbox64;
3904         mbox_t                  *mbox;
3905         char                    *raw_mbox;
3906         struct timer_list       sysfs_timer;
3907         struct timer_list       *timerp;
3908         caddr_t                 ldmap;
3909         int                     rval = 0;
3910
3911         /*
3912          * Allow only one read at a time to go through the sysfs attributes
3913          */
3914         down(&raid_dev->sysfs_sem);
3915
3916         uioc    = raid_dev->sysfs_uioc;
3917         mbox64  = raid_dev->sysfs_mbox64;
3918         ldmap   = raid_dev->sysfs_buffer;
3919
3920         memset(uioc, 0, sizeof(uioc_t));
3921         memset(mbox64, 0, sizeof(mbox64_t));
3922         memset(ldmap, 0, sizeof(raid_dev->curr_ldmap));
3923
3924         mbox            = &mbox64->mbox32;
3925         raw_mbox        = (char *)mbox;
3926         uioc->cmdbuf    = (uint64_t)(unsigned long)mbox64;
3927         uioc->buf_vaddr = (caddr_t)adapter;
3928         uioc->status    = -ENODATA;
3929         uioc->done      = megaraid_sysfs_get_ldmap_done;
3930
3931         /*
3932          * Prepare the mailbox packet to get the current logical drive mapping
3933          * table
3934          */
3935         mbox->xferaddr = (uint32_t)raid_dev->sysfs_buffer_dma;
3936
3937         raw_mbox[0] = FC_DEL_LOGDRV;
3938         raw_mbox[2] = OP_GET_LDID_MAP;
3939
3940         /*
3941          * Setup a timer to recover from a non-responding controller
3942          */
3943         timerp  = &sysfs_timer;
3944         init_timer(timerp);
3945
3946         timerp->function        = megaraid_sysfs_get_ldmap_timeout;
3947         timerp->data            = (unsigned long)uioc;
3948         timerp->expires         = jiffies + 60 * HZ;
3949
3950         add_timer(timerp);
3951
3952         /*
3953          * Send the command to the firmware
3954          */
3955         rval = megaraid_mbox_mm_command(adapter, uioc);
3956
3957         if (rval == 0) {        // command successfully issued
3958                 wait_event(raid_dev->sysfs_wait_q, (uioc->status != -ENODATA));
3959
3960                 /*
3961                  * Check if the command timed out
3962                  */
3963                 if (uioc->status == -ETIME) {
3964                         con_log(CL_ANN, (KERN_NOTICE
3965                                 "megaraid: sysfs get ld map timed out\n"));
3966
3967                         rval = -ETIME;
3968                 }
3969                 else {
3970                         rval = mbox->status;
3971                 }
3972
3973                 if (rval == 0) {
3974                         memcpy(raid_dev->curr_ldmap, ldmap,
3975                                 sizeof(raid_dev->curr_ldmap));
3976                 }
3977                 else {
3978                         con_log(CL_ANN, (KERN_NOTICE
3979                                 "megaraid: get ld map failed with %x\n", rval));
3980                 }
3981         }
3982         else {
3983                 con_log(CL_ANN, (KERN_NOTICE
3984                         "megaraid: could not issue ldmap command:%x\n", rval));
3985         }
3986
3987
3988         del_timer_sync(timerp);
3989
3990         up(&raid_dev->sysfs_sem);
3991
3992         return rval;
3993 }
3994
3995
3996 /**
3997  * megaraid_sysfs_show_app_hndl - display application handle for this adapter
3998  *
3999  * Display the handle used by the applications while executing management
4000  * tasks on the adapter. We invoke a management module API to get the adapter
4001  * handle, since we do not interface with applications directly.
4002  *
4003  * @param cdev  : class device object representation for the host
4004  * @param buf   : buffer to send data to
4005  */
4006 static ssize_t
4007 megaraid_sysfs_show_app_hndl(struct class_device *cdev, char *buf)
4008 {
4009         struct Scsi_Host *shost = class_to_shost(cdev);
4010         adapter_t       *adapter = (adapter_t *)SCSIHOST2ADAP(shost);
4011         uint32_t        app_hndl;
4012
4013         app_hndl = mraid_mm_adapter_app_handle(adapter->unique_id);
4014
4015         return snprintf(buf, 8, "%u\n", app_hndl);
4016 }
4017
4018
4019 /**
4020  * megaraid_sysfs_show_ldnum - display the logical drive number for this device
4021  *
4022  * Display the logical drive number for the device in question, if it a valid
4023  * logical drive. For physical devices, "-1" is returned
4024  * The logical drive number is displayed in following format
4025  *
4026  * <SCSI ID> <LD NUM> <LD STICKY ID> <APP ADAPTER HANDLE>
4027  *   <int>     <int>       <int>            <int>
4028  *
4029  * @param dev   : device object representation for the scsi device
4030  * @param buf   : buffer to send data to
4031  */
4032 static ssize_t
4033 megaraid_sysfs_show_ldnum(struct device *dev, struct device_attribute *attr, char *buf)
4034 {
4035         struct scsi_device *sdev = to_scsi_device(dev);
4036         adapter_t       *adapter = (adapter_t *)SCSIHOST2ADAP(sdev->host);
4037         mraid_device_t  *raid_dev = ADAP2RAIDDEV(adapter);
4038         int             scsi_id = -1;
4039         int             logical_drv = -1;
4040         int             ldid_map = -1;
4041         uint32_t        app_hndl = 0;
4042         int             mapped_sdev_id;
4043         int             rval;
4044         int             i;
4045
4046         if (raid_dev->random_del_supported &&
4047                         MRAID_IS_LOGICAL_SDEV(adapter, sdev)) {
4048
4049                 rval = megaraid_sysfs_get_ldmap(adapter);
4050                 if (rval == 0) {
4051
4052                         for (i = 0; i < MAX_LOGICAL_DRIVES_40LD; i++) {
4053
4054                                 mapped_sdev_id = sdev->id;
4055
4056                                 if (sdev->id > adapter->init_id) {
4057                                         mapped_sdev_id -= 1;
4058                                 }
4059
4060                                 if (raid_dev->curr_ldmap[i] == mapped_sdev_id) {
4061
4062                                         scsi_id = sdev->id;
4063
4064                                         logical_drv = i;
4065
4066                                         ldid_map = raid_dev->curr_ldmap[i];
4067
4068                                         app_hndl = mraid_mm_adapter_app_handle(
4069                                                         adapter->unique_id);
4070
4071                                         break;
4072                                 }
4073                         }
4074                 }
4075                 else {
4076                         con_log(CL_ANN, (KERN_NOTICE
4077                                 "megaraid: sysfs get ld map failed: %x\n",
4078                                 rval));
4079                 }
4080         }
4081
4082         return snprintf(buf, 36, "%d %d %d %d\n", scsi_id, logical_drv,
4083                         ldid_map, app_hndl);
4084 }
4085
4086
4087 /*
4088  * END: Mailbox Low Level Driver
4089  */
4090 module_init(megaraid_init);
4091 module_exit(megaraid_exit);
4092
4093 /* vim: set ts=8 sw=8 tw=78 ai si: */