drivers/scsi/megaraid/megaraid_mbox.c

   1 /*
   2  *
   3  *                      Linux MegaRAID device driver
   4  *
   5  * Copyright (c) 2003-2004  LSI Logic Corporation.
   6  *
   7  *         This program is free software; you can redistribute it and/or
   8  *         modify it under the terms of the GNU General Public License
   9  *         as published by the Free Software Foundation; either version
  10  *         2 of the License, or (at your option) any later version.
  11  *
  12  * FILE         : megaraid_mbox.c
  13  * Version      : v2.20.5.1 (Nov 16 2006)
  14  *
  15  * Authors:
  16  *      Atul Mukker             <Atul.Mukker@lsi.com>
  17  *      Sreenivas Bagalkote     <Sreenivas.Bagalkote@lsi.com>
  18  *      Manoj Jose              <Manoj.Jose@lsi.com>
  19  *      Seokmann Ju
  20  *
  21  * List of supported controllers
  22  *
  23  * OEM  Product Name                    VID     DID     SSVID   SSID
  24  * ---  ------------                    ---     ---     ----    ----
  25  * Dell PERC3/QC                        101E    1960    1028    0471
  26  * Dell PERC3/DC                        101E    1960    1028    0493
  27  * Dell PERC3/SC                        101E    1960    1028    0475
  28  * Dell PERC3/Di                        1028    1960    1028    0123
  29  * Dell PERC4/SC                        1000    1960    1028    0520
  30  * Dell PERC4/DC                        1000    1960    1028    0518
  31  * Dell PERC4/QC                        1000    0407    1028    0531
  32  * Dell PERC4/Di                        1028    000F    1028    014A
  33  * Dell PERC 4e/Si                      1028    0013    1028    016c
  34  * Dell PERC 4e/Di                      1028    0013    1028    016d
  35  * Dell PERC 4e/Di                      1028    0013    1028    016e
  36  * Dell PERC 4e/Di                      1028    0013    1028    016f
  37  * Dell PERC 4e/Di                      1028    0013    1028    0170
  38  * Dell PERC 4e/DC                      1000    0408    1028    0002
  39  * Dell PERC 4e/SC                      1000    0408    1028    0001
  40  *
  41  *
  42  * LSI MegaRAID SCSI 320-0              1000    1960    1000    A520
  43  * LSI MegaRAID SCSI 320-1              1000    1960    1000    0520
  44  * LSI MegaRAID SCSI 320-2              1000    1960    1000    0518
  45  * LSI MegaRAID SCSI 320-0X             1000    0407    1000    0530
  46  * LSI MegaRAID SCSI 320-2X             1000    0407    1000    0532
  47  * LSI MegaRAID SCSI 320-4X             1000    0407    1000    0531
  48  * LSI MegaRAID SCSI 320-1E             1000    0408    1000    0001
  49  * LSI MegaRAID SCSI 320-2E             1000    0408    1000    0002
  50  * LSI MegaRAID SATA 150-4              1000    1960    1000    4523
  51  * LSI MegaRAID SATA 150-6              1000    1960    1000    0523
  52  * LSI MegaRAID SATA 300-4X             1000    0409    1000    3004
  53  * LSI MegaRAID SATA 300-8X             1000    0409    1000    3008
  54  *
  55  * INTEL RAID Controller SRCU42X        1000    0407    8086    0532
  56  * INTEL RAID Controller SRCS16         1000    1960    8086    0523
  57  * INTEL RAID Controller SRCU42E        1000    0408    8086    0002
  58  * INTEL RAID Controller SRCZCRX        1000    0407    8086    0530
  59  * INTEL RAID Controller SRCS28X        1000    0409    8086    3008
  60  * INTEL RAID Controller SROMBU42E      1000    0408    8086    3431
  61  * INTEL RAID Controller SROMBU42E      1000    0408    8086    3499
  62  * INTEL RAID Controller SRCU51L        1000    1960    8086    0520
  63  *
  64  * FSC  MegaRAID PCI Express ROMB       1000    0408    1734    1065
  65  *
  66  * ACER MegaRAID ROMB-2E                1000    0408    1025    004D
  67  *
  68  * NEC  MegaRAID PCI Express ROMB       1000    0408    1033    8287
  69  *
  70  * For history of changes, see Documentation/scsi/ChangeLog.megaraid
  71  */
  72
  73 #include <linux/slab.h>
  74 #include <linux/module.h>
  75 #include "megaraid_mbox.h"
  76
  77 static int megaraid_init(void);
  78 static void megaraid_exit(void);
  79
  80 static int megaraid_probe_one(struct pci_dev*, const struct pci_device_id *);
  81 static void megaraid_detach_one(struct pci_dev *);
  82 static void megaraid_mbox_shutdown(struct pci_dev *);
  83
  84 static int megaraid_io_attach(adapter_t *);
  85 static void megaraid_io_detach(adapter_t *);
  86
  87 static int megaraid_init_mbox(adapter_t *);
  88 static void megaraid_fini_mbox(adapter_t *);
  89
  90 static int megaraid_alloc_cmd_packets(adapter_t *);
  91 static void megaraid_free_cmd_packets(adapter_t *);
  92
  93 static int megaraid_mbox_setup_dma_pools(adapter_t *);
  94 static void megaraid_mbox_teardown_dma_pools(adapter_t *);
  95
  96 static int megaraid_sysfs_alloc_resources(adapter_t *);
  97 static void megaraid_sysfs_free_resources(adapter_t *);
  98
  99 static int megaraid_abort_handler(struct scsi_cmnd *);
 100 static int megaraid_reset_handler(struct scsi_cmnd *);
 101
 102 static int mbox_post_sync_cmd(adapter_t *, uint8_t []);
 103 static int mbox_post_sync_cmd_fast(adapter_t *, uint8_t []);
 104 static int megaraid_busywait_mbox(mraid_device_t *);
 105 static int megaraid_mbox_product_info(adapter_t *);
 106 static int megaraid_mbox_extended_cdb(adapter_t *);
 107 static int megaraid_mbox_support_ha(adapter_t *, uint16_t *);
 108 static int megaraid_mbox_support_random_del(adapter_t *);
 109 static int megaraid_mbox_get_max_sg(adapter_t *);
 110 static void megaraid_mbox_enum_raid_scsi(adapter_t *);
 111 static void megaraid_mbox_flush_cache(adapter_t *);
 112 static int megaraid_mbox_fire_sync_cmd(adapter_t *);
 113
 114 static void megaraid_mbox_display_scb(adapter_t *, scb_t *);
 115 static void megaraid_mbox_setup_device_map(adapter_t *);
 116
 117 static int megaraid_queue_command(struct Scsi_Host *, struct scsi_cmnd *);
 118 static scb_t *megaraid_mbox_build_cmd(adapter_t *, struct scsi_cmnd *, int *);
 119 static void megaraid_mbox_runpendq(adapter_t *, scb_t *);
 120 static void megaraid_mbox_prepare_pthru(adapter_t *, scb_t *,
 121                 struct scsi_cmnd *);
 122 static void megaraid_mbox_prepare_epthru(adapter_t *, scb_t *,
 123                 struct scsi_cmnd *);
 124
 125 static irqreturn_t megaraid_isr(int, void *);
 126
 127 static void megaraid_mbox_dpc(unsigned long);
 128
 129 static ssize_t megaraid_sysfs_show_app_hndl(struct device *, struct device_attribute *attr, char *);
 130 static ssize_t megaraid_sysfs_show_ldnum(struct device *, struct device_attribute *attr, char *);
 131
 132 static int megaraid_cmm_register(adapter_t *);
 133 static int megaraid_cmm_unregister(adapter_t *);
 134 static int megaraid_mbox_mm_handler(unsigned long, uioc_t *, uint32_t);
 135 static int megaraid_mbox_mm_command(adapter_t *, uioc_t *);
 136 static void megaraid_mbox_mm_done(adapter_t *, scb_t *);
 137 static int gather_hbainfo(adapter_t *, mraid_hba_info_t *);
 138 static int wait_till_fw_empty(adapter_t *);
 139
 140
 141
 142 MODULE_AUTHOR("megaraidlinux@lsi.com");
 143 MODULE_DESCRIPTION("LSI Logic MegaRAID Mailbox Driver");
 144 MODULE_LICENSE("GPL");
 145 MODULE_VERSION(MEGARAID_VERSION);
 146
 147 /*
 148  * ### modules parameters for driver ###
 149  */
 150
 151 /*
 152  * Set to enable driver to expose unconfigured disk to kernel
 153  */
 154 static int megaraid_expose_unconf_disks = 0;
 155 module_param_named(unconf_disks, megaraid_expose_unconf_disks, int, 0);
 156 MODULE_PARM_DESC(unconf_disks,
 157         "Set to expose unconfigured disks to kernel (default=0)");
 158
 159 /*
 160  * driver wait time if the adapter's mailbox is busy
 161  */
 162 static unsigned int max_mbox_busy_wait = MBOX_BUSY_WAIT;
 163 module_param_named(busy_wait, max_mbox_busy_wait, int, 0);
 164 MODULE_PARM_DESC(busy_wait,
 165         "Max wait for mailbox in microseconds if busy (default=10)");
 166
 167 /*
 168  * number of sectors per IO command
 169  */
 170 static unsigned int megaraid_max_sectors = MBOX_MAX_SECTORS;
 171 module_param_named(max_sectors, megaraid_max_sectors, int, 0);
 172 MODULE_PARM_DESC(max_sectors,
 173         "Maximum number of sectors per IO command (default=128)");
 174
 175 /*
 176  * number of commands per logical unit
 177  */
 178 static unsigned int megaraid_cmd_per_lun = MBOX_DEF_CMD_PER_LUN;
 179 module_param_named(cmd_per_lun, megaraid_cmd_per_lun, int, 0);
 180 MODULE_PARM_DESC(cmd_per_lun,
 181         "Maximum number of commands per logical unit (default=64)");
 182
 183
 184 /*
 185  * Fast driver load option, skip scanning for physical devices during load.
 186  * This would result in non-disk devices being skipped during driver load
 187  * time. These can be later added though, using /proc/scsi/scsi
 188  */
 189 static unsigned int megaraid_fast_load = 0;
 190 module_param_named(fast_load, megaraid_fast_load, int, 0);
 191 MODULE_PARM_DESC(fast_load,
 192         "Faster loading of the driver, skips physical devices! (default=0)");
 193
 194
 195 /*
 196  * mraid_debug level - threshold for amount of information to be displayed by
 197  * the driver. This level can be changed through modules parameters, ioctl or
 198  * sysfs/proc interface. By default, print the announcement messages only.
 199  */
 200 int mraid_debug_level = CL_ANN;
 201 module_param_named(debug_level, mraid_debug_level, int, 0);
 202 MODULE_PARM_DESC(debug_level, "Debug level for driver (default=0)");
 203
 204 /*
 205  * ### global data ###
 206  */
 207 static uint8_t megaraid_mbox_version[8] =
 208         { 0x02, 0x20, 0x04, 0x06, 3, 7, 20, 5 };
 209
 210
 211 /*
 212  * PCI table for all supported controllers.
 213  */
 214 static struct pci_device_id pci_id_table_g[] =  {
 215         {
 216                 PCI_VENDOR_ID_DELL,
 217                 PCI_DEVICE_ID_PERC4_DI_DISCOVERY,
 218                 PCI_VENDOR_ID_DELL,
 219                 PCI_SUBSYS_ID_PERC4_DI_DISCOVERY,
 220         },
 221         {
 222                 PCI_VENDOR_ID_LSI_LOGIC,
 223                 PCI_DEVICE_ID_PERC4_SC,
 224                 PCI_VENDOR_ID_DELL,
 225                 PCI_SUBSYS_ID_PERC4_SC,
 226         },
 227         {
 228                 PCI_VENDOR_ID_LSI_LOGIC,
 229                 PCI_DEVICE_ID_PERC4_DC,
 230                 PCI_VENDOR_ID_DELL,
 231                 PCI_SUBSYS_ID_PERC4_DC,
 232         },
 233         {
 234                 PCI_VENDOR_ID_LSI_LOGIC,
 235                 PCI_DEVICE_ID_VERDE,
 236                 PCI_ANY_ID,
 237                 PCI_ANY_ID,
 238         },
 239         {
 240                 PCI_VENDOR_ID_DELL,
 241                 PCI_DEVICE_ID_PERC4_DI_EVERGLADES,
 242                 PCI_VENDOR_ID_DELL,
 243                 PCI_SUBSYS_ID_PERC4_DI_EVERGLADES,
 244         },
 245         {
 246                 PCI_VENDOR_ID_DELL,
 247                 PCI_DEVICE_ID_PERC4E_SI_BIGBEND,
 248                 PCI_VENDOR_ID_DELL,
 249                 PCI_SUBSYS_ID_PERC4E_SI_BIGBEND,
 250         },
 251         {
 252                 PCI_VENDOR_ID_DELL,
 253                 PCI_DEVICE_ID_PERC4E_DI_KOBUK,
 254                 PCI_VENDOR_ID_DELL,
 255                 PCI_SUBSYS_ID_PERC4E_DI_KOBUK,
 256         },
 257         {
 258                 PCI_VENDOR_ID_DELL,
 259                 PCI_DEVICE_ID_PERC4E_DI_CORVETTE,
 260                 PCI_VENDOR_ID_DELL,
 261                 PCI_SUBSYS_ID_PERC4E_DI_CORVETTE,
 262         },
 263         {
 264                 PCI_VENDOR_ID_DELL,
 265                 PCI_DEVICE_ID_PERC4E_DI_EXPEDITION,
 266                 PCI_VENDOR_ID_DELL,
 267                 PCI_SUBSYS_ID_PERC4E_DI_EXPEDITION,
 268         },
 269         {
 270                 PCI_VENDOR_ID_DELL,
 271                 PCI_DEVICE_ID_PERC4E_DI_GUADALUPE,
 272                 PCI_VENDOR_ID_DELL,
 273                 PCI_SUBSYS_ID_PERC4E_DI_GUADALUPE,
 274         },
 275         {
 276                 PCI_VENDOR_ID_LSI_LOGIC,
 277                 PCI_DEVICE_ID_DOBSON,
 278                 PCI_ANY_ID,
 279                 PCI_ANY_ID,
 280         },
 281         {
 282                 PCI_VENDOR_ID_AMI,
 283                 PCI_DEVICE_ID_AMI_MEGARAID3,
 284                 PCI_ANY_ID,
 285                 PCI_ANY_ID,
 286         },
 287         {
 288                 PCI_VENDOR_ID_LSI_LOGIC,
 289                 PCI_DEVICE_ID_AMI_MEGARAID3,
 290                 PCI_ANY_ID,
 291                 PCI_ANY_ID,
 292         },
 293         {
 294                 PCI_VENDOR_ID_LSI_LOGIC,
 295                 PCI_DEVICE_ID_LINDSAY,
 296                 PCI_ANY_ID,
 297                 PCI_ANY_ID,
 298         },
 299         {0}     /* Terminating entry */
 300 };
 301 MODULE_DEVICE_TABLE(pci, pci_id_table_g);
 302
 303
 304 static struct pci_driver megaraid_pci_driver = {
 305         .name           = "megaraid",
 306         .id_table       = pci_id_table_g,
 307         .probe          = megaraid_probe_one,
 308         .remove         = megaraid_detach_one,
 309         .shutdown       = megaraid_mbox_shutdown,
 310 };
 311
 312
 313
 314 // definitions for the device attributes for exporting logical drive number
 315 // for a scsi address (Host, Channel, Id, Lun)
 316
 317 DEVICE_ATTR(megaraid_mbox_app_hndl, S_IRUSR, megaraid_sysfs_show_app_hndl,
 318                 NULL);
 319
 320 // Host template initializer for megaraid mbox sysfs device attributes
 321 static struct device_attribute *megaraid_shost_attrs[] = {
 322         &dev_attr_megaraid_mbox_app_hndl,
 323         NULL,
 324 };
 325
 326
 327 DEVICE_ATTR(megaraid_mbox_ld, S_IRUSR, megaraid_sysfs_show_ldnum, NULL);
 328
 329 // Host template initializer for megaraid mbox sysfs device attributes
 330 static struct device_attribute *megaraid_sdev_attrs[] = {
 331         &dev_attr_megaraid_mbox_ld,
 332         NULL,
 333 };
 334
 335 /**
 336  * megaraid_change_queue_depth - Change the device's queue depth
 337  * @sdev:       scsi device struct
 338  * @qdepth:     depth to set
 339  * @reason:     calling context
 340  *
 341  * Return value:
 342  *      actual depth set
 343  */
 344 static int megaraid_change_queue_depth(struct scsi_device *sdev, int qdepth,
 345                                        int reason)
 346 {
 347         if (reason != SCSI_QDEPTH_DEFAULT)
 348                 return -EOPNOTSUPP;
 349
 350         if (qdepth > MBOX_MAX_SCSI_CMDS)
 351                 qdepth = MBOX_MAX_SCSI_CMDS;
 352         scsi_adjust_queue_depth(sdev, 0, qdepth);
 353         return sdev->queue_depth;
 354 }
 355
 356 /*
 357  * Scsi host template for megaraid unified driver
 358  */
 359 static struct scsi_host_template megaraid_template_g = {
 360         .module                         = THIS_MODULE,
 361         .name                           = "LSI Logic MegaRAID driver",
 362         .proc_name                      = "megaraid",
 363         .queuecommand                   = megaraid_queue_command,
 364         .eh_abort_handler               = megaraid_abort_handler,
 365         .eh_device_reset_handler        = megaraid_reset_handler,
 366         .eh_bus_reset_handler           = megaraid_reset_handler,
 367         .eh_host_reset_handler          = megaraid_reset_handler,
 368         .change_queue_depth             = megaraid_change_queue_depth,
 369         .use_clustering                 = ENABLE_CLUSTERING,
 370         .sdev_attrs                     = megaraid_sdev_attrs,
 371         .shost_attrs                    = megaraid_shost_attrs,
 372 };
 373
 374
 375 /**
 376  * megaraid_init - module load hook
 377  *
 378  * We register ourselves as hotplug enabled module and let PCI subsystem
 379  * discover our adapters.
 380  */
 381 static int __init
 382 megaraid_init(void)
 383 {
 384         int     rval;
 385
 386         // Announce the driver version
 387         con_log(CL_ANN, (KERN_INFO "megaraid: %s %s\n", MEGARAID_VERSION,
 388                 MEGARAID_EXT_VERSION));
 389
 390         // check validity of module parameters
 391         if (megaraid_cmd_per_lun > MBOX_MAX_SCSI_CMDS) {
 392
 393                 con_log(CL_ANN, (KERN_WARNING
 394                         "megaraid mailbox: max commands per lun reset to %d\n",
 395                         MBOX_MAX_SCSI_CMDS));
 396
 397                 megaraid_cmd_per_lun = MBOX_MAX_SCSI_CMDS;
 398         }
 399
 400
 401         // register as a PCI hot-plug driver module
 402         rval = pci_register_driver(&megaraid_pci_driver);
 403         if (rval < 0) {
 404                 con_log(CL_ANN, (KERN_WARNING
 405                         "megaraid: could not register hotplug support.\n"));
 406         }
 407
 408         return rval;
 409 }
 410
 411
 412 /**
 413  * megaraid_exit - driver unload entry point
 414  *
 415  * We simply unwrap the megaraid_init routine here.
 416  */
 417 static void __exit
 418 megaraid_exit(void)
 419 {
 420         con_log(CL_DLEVEL1, (KERN_NOTICE "megaraid: unloading framework\n"));
 421
 422         // unregister as PCI hotplug driver
 423         pci_unregister_driver(&megaraid_pci_driver);
 424
 425         return;
 426 }
 427
 428
 429 /**
 430  * megaraid_probe_one - PCI hotplug entry point
 431  * @pdev        : handle to this controller's PCI configuration space
 432  * @id          : pci device id of the class of controllers
 433  *
 434  * This routine should be called whenever a new adapter is detected by the
 435  * PCI hotplug susbsystem.
 436  */
 437 static int
 438 megaraid_probe_one(struct pci_dev *pdev, const struct pci_device_id *id)
 439 {
 440         adapter_t       *adapter;
 441
 442
 443         // detected a new controller
 444         con_log(CL_ANN, (KERN_INFO
 445                 "megaraid: probe new device %#4.04x:%#4.04x:%#4.04x:%#4.04x: ",
 446                 pdev->vendor, pdev->device, pdev->subsystem_vendor,
 447                 pdev->subsystem_device));
 448
 449         con_log(CL_ANN, ("bus %d:slot %d:func %d\n", pdev->bus->number,
 450                 PCI_SLOT(pdev->devfn), PCI_FUNC(pdev->devfn)));
 451
 452         if (pci_enable_device(pdev)) {
 453                 con_log(CL_ANN, (KERN_WARNING
 454                                 "megaraid: pci_enable_device failed\n"));
 455
 456                 return -ENODEV;
 457         }
 458
 459         // Enable bus-mastering on this controller
 460         pci_set_master(pdev);
 461
 462         // Allocate the per driver initialization structure
 463         adapter = kzalloc(sizeof(adapter_t), GFP_KERNEL);
 464
 465         if (adapter == NULL) {
 466                 con_log(CL_ANN, (KERN_WARNING
 467                 "megaraid: out of memory, %s %d.\n", __func__, __LINE__));
 468
 469                 goto out_probe_one;
 470         }
 471
 472
 473         // set up PCI related soft state and other pre-known parameters
 474         adapter->unique_id      = pdev->bus->number << 8 | pdev->devfn;
 475         adapter->irq            = pdev->irq;
 476         adapter->pdev           = pdev;
 477
 478         atomic_set(&adapter->being_detached, 0);
 479
 480         // Setup the default DMA mask. This would be changed later on
 481         // depending on hardware capabilities
 482         if (pci_set_dma_mask(adapter->pdev, DMA_BIT_MASK(32)) != 0) {
 483
 484                 con_log(CL_ANN, (KERN_WARNING
 485                         "megaraid: pci_set_dma_mask failed:%d\n", __LINE__));
 486
 487                 goto out_free_adapter;
 488         }
 489
 490
 491         // Initialize the synchronization lock for kernel and LLD
 492         spin_lock_init(&adapter->lock);
 493
 494         // Initialize the command queues: the list of free SCBs and the list
 495         // of pending SCBs.
 496         INIT_LIST_HEAD(&adapter->kscb_pool);
 497         spin_lock_init(SCSI_FREE_LIST_LOCK(adapter));
 498
 499         INIT_LIST_HEAD(&adapter->pend_list);
 500         spin_lock_init(PENDING_LIST_LOCK(adapter));
 501
 502         INIT_LIST_HEAD(&adapter->completed_list);
 503         spin_lock_init(COMPLETED_LIST_LOCK(adapter));
 504
 505
 506         // Start the mailbox based controller
 507         if (megaraid_init_mbox(adapter) != 0) {
 508                 con_log(CL_ANN, (KERN_WARNING
 509                         "megaraid: maibox adapter did not initialize\n"));
 510
 511                 goto out_free_adapter;
 512         }
 513
 514         // Register with LSI Common Management Module
 515         if (megaraid_cmm_register(adapter) != 0) {
 516
 517                 con_log(CL_ANN, (KERN_WARNING
 518                 "megaraid: could not register with management module\n"));
 519
 520                 goto out_fini_mbox;
 521         }
 522
 523         // setup adapter handle in PCI soft state
 524         pci_set_drvdata(pdev, adapter);
 525
 526         // attach with scsi mid-layer
 527         if (megaraid_io_attach(adapter) != 0) {
 528
 529                 con_log(CL_ANN, (KERN_WARNING "megaraid: io attach failed\n"));
 530
 531                 goto out_cmm_unreg;
 532         }
 533
 534         return 0;
 535
 536 out_cmm_unreg:
 537         pci_set_drvdata(pdev, NULL);
 538         megaraid_cmm_unregister(adapter);
 539 out_fini_mbox:
 540         megaraid_fini_mbox(adapter);
 541 out_free_adapter:
 542         kfree(adapter);
 543 out_probe_one:
 544         pci_disable_device(pdev);
 545
 546         return -ENODEV;
 547 }
 548
 549
 550 /**
 551  * megaraid_detach_one - release framework resources and call LLD release routine
 552  * @pdev        : handle for our PCI cofiguration space
 553  *
 554  * This routine is called during driver unload. We free all the allocated
 555  * resources and call the corresponding LLD so that it can also release all
 556  * its resources.
 557  *
 558  * This routine is also called from the PCI hotplug system.
 559  */
 560 static void
 561 megaraid_detach_one(struct pci_dev *pdev)
 562 {
 563         adapter_t               *adapter;
 564         struct Scsi_Host        *host;
 565
 566
 567         // Start a rollback on this adapter
 568         adapter = pci_get_drvdata(pdev);
 569
 570         if (!adapter) {
 571                 con_log(CL_ANN, (KERN_CRIT
 572                 "megaraid: Invalid detach on %#4.04x:%#4.04x:%#4.04x:%#4.04x\n",
 573                         pdev->vendor, pdev->device, pdev->subsystem_vendor,
 574                         pdev->subsystem_device));
 575
 576                 return;
 577         }
 578         else {
 579                 con_log(CL_ANN, (KERN_NOTICE
 580                 "megaraid: detaching device %#4.04x:%#4.04x:%#4.04x:%#4.04x\n",
 581                         pdev->vendor, pdev->device, pdev->subsystem_vendor,
 582                         pdev->subsystem_device));
 583         }
 584
 585
 586         host = adapter->host;
 587
 588         // do not allow any more requests from the management module for this
 589         // adapter.
 590         // FIXME: How do we account for the request which might still be
 591         // pending with us?
 592         atomic_set(&adapter->being_detached, 1);
 593
 594         // detach from the IO sub-system
 595         megaraid_io_detach(adapter);
 596
 597         // reset the device state in the PCI structure. We check this
 598         // condition when we enter here. If the device state is NULL,
 599         // that would mean the device has already been removed
 600         pci_set_drvdata(pdev, NULL);
 601
 602         // Unregister from common management module
 603         //
 604         // FIXME: this must return success or failure for conditions if there
 605         // is a command pending with LLD or not.
 606         megaraid_cmm_unregister(adapter);
 607
 608         // finalize the mailbox based controller and release all resources
 609         megaraid_fini_mbox(adapter);
 610
 611         kfree(adapter);
 612
 613         scsi_host_put(host);
 614
 615         pci_disable_device(pdev);
 616
 617         return;
 618 }
 619
 620
 621 /**
 622  * megaraid_mbox_shutdown - PCI shutdown for megaraid HBA
 623  * @pdev                : generic driver model device
 624  *
 625  * Shutdown notification, perform flush cache.
 626  */
 627 static void
 628 megaraid_mbox_shutdown(struct pci_dev *pdev)
 629 {
 630         adapter_t               *adapter = pci_get_drvdata(pdev);
 631         static int              counter;
 632
 633         if (!adapter) {
 634                 con_log(CL_ANN, (KERN_WARNING
 635                         "megaraid: null device in shutdown\n"));
 636                 return;
 637         }
 638
 639         // flush caches now
 640         con_log(CL_ANN, (KERN_INFO "megaraid: flushing adapter %d...",
 641                 counter++));
 642
 643         megaraid_mbox_flush_cache(adapter);
 644
 645         con_log(CL_ANN, ("done\n"));
 646 }
 647
 648
 649 /**
 650  * megaraid_io_attach - attach a device with the IO subsystem
 651  * @adapter             : controller's soft state
 652  *
 653  * Attach this device with the IO subsystem.
 654  */
 655 static int
 656 megaraid_io_attach(adapter_t *adapter)
 657 {
 658         struct Scsi_Host        *host;
 659
 660         // Initialize SCSI Host structure
 661         host = scsi_host_alloc(&megaraid_template_g, 8);
 662         if (!host) {
 663                 con_log(CL_ANN, (KERN_WARNING
 664                         "megaraid mbox: scsi_register failed\n"));
 665
 666                 return -1;
 667         }
 668
 669         SCSIHOST2ADAP(host)     = (caddr_t)adapter;
 670         adapter->host           = host;
 671
 672         host->irq               = adapter->irq;
 673         host->unique_id         = adapter->unique_id;
 674         host->can_queue         = adapter->max_cmds;
 675         host->this_id           = adapter->init_id;
 676         host->sg_tablesize      = adapter->sglen;
 677         host->max_sectors       = adapter->max_sectors;
 678         host->cmd_per_lun       = adapter->cmd_per_lun;
 679         host->max_channel       = adapter->max_channel;
 680         host->max_id            = adapter->max_target;
 681         host->max_lun           = adapter->max_lun;
 682
 683
 684         // notify mid-layer about the new controller
 685         if (scsi_add_host(host, &adapter->pdev->dev)) {
 686
 687                 con_log(CL_ANN, (KERN_WARNING
 688                         "megaraid mbox: scsi_add_host failed\n"));
 689
 690                 scsi_host_put(host);
 691
 692                 return -1;
 693         }
 694
 695         scsi_scan_host(host);
 696
 697         return 0;
 698 }
 699
 700
 701 /**
 702  * megaraid_io_detach - detach a device from the IO subsystem
 703  * @adapter             : controller's soft state
 704  *
 705  * Detach this device from the IO subsystem.
 706  */
 707 static void
 708 megaraid_io_detach(adapter_t *adapter)
 709 {
 710         struct Scsi_Host        *host;
 711
 712         con_log(CL_DLEVEL1, (KERN_INFO "megaraid: io detach\n"));
 713
 714         host = adapter->host;
 715
 716         scsi_remove_host(host);
 717
 718         return;
 719 }
 720
 721
 722 /*
 723  * START: Mailbox Low Level Driver
 724  *
 725  * This is section specific to the single mailbox based controllers
 726  */
 727
 728 /**
 729  * megaraid_init_mbox - initialize controller
 730  * @adapter             : our soft state
 731  *
 732  * - Allocate 16-byte aligned mailbox memory for firmware handshake
 733  * - Allocate controller's memory resources
 734  * - Find out all initialization data
 735  * - Allocate memory required for all the commands
 736  * - Use internal library of FW routines, build up complete soft state
 737  */
 738 static int
 739 megaraid_init_mbox(adapter_t *adapter)
 740 {
 741         struct pci_dev          *pdev;
 742         mraid_device_t          *raid_dev;
 743         int                     i;
 744         uint32_t                magic64;
 745
 746
 747         adapter->ito    = MBOX_TIMEOUT;
 748         pdev            = adapter->pdev;
 749
 750         /*
 751          * Allocate and initialize the init data structure for mailbox
 752          * controllers
 753          */
 754         raid_dev = kzalloc(sizeof(mraid_device_t), GFP_KERNEL);
 755         if (raid_dev == NULL) return -1;
 756
 757
 758         /*
 759          * Attach the adapter soft state to raid device soft state
 760          */
 761         adapter->raid_device    = (caddr_t)raid_dev;
 762         raid_dev->fast_load     = megaraid_fast_load;
 763
 764
 765         // our baseport
 766         raid_dev->baseport = pci_resource_start(pdev, 0);
 767
 768         if (pci_request_regions(pdev, "MegaRAID: LSI Logic Corporation") != 0) {
 769
 770                 con_log(CL_ANN, (KERN_WARNING
 771                                 "megaraid: mem region busy\n"));
 772
 773                 goto out_free_raid_dev;
 774         }
 775
 776         raid_dev->baseaddr = ioremap_nocache(raid_dev->baseport, 128);
 777
 778         if (!raid_dev->baseaddr) {
 779
 780                 con_log(CL_ANN, (KERN_WARNING
 781                         "megaraid: could not map hba memory\n") );
 782
 783                 goto out_release_regions;
 784         }
 785
 786         /* initialize the mutual exclusion lock for the mailbox */
 787         spin_lock_init(&raid_dev->mailbox_lock);
 788
 789         /* allocate memory required for commands */
 790         if (megaraid_alloc_cmd_packets(adapter) != 0)
 791                 goto out_iounmap;
 792
 793         /*
 794          * Issue SYNC cmd to flush the pending cmds in the adapter
 795          * and initialize its internal state
 796          */
 797
 798         if (megaraid_mbox_fire_sync_cmd(adapter))
 799                 con_log(CL_ANN, ("megaraid: sync cmd failed\n"));
 800
 801         /*
 802          * Setup the rest of the soft state using the library of
 803          * FW routines
 804          */
 805
 806         /* request IRQ and register the interrupt service routine */
 807         if (request_irq(adapter->irq, megaraid_isr, IRQF_SHARED, "megaraid",
 808                 adapter)) {
 809
 810                 con_log(CL_ANN, (KERN_WARNING
 811                         "megaraid: Couldn't register IRQ %d!\n", adapter->irq));
 812                 goto out_alloc_cmds;
 813
 814         }
 815
 816         // Product info
 817         if (megaraid_mbox_product_info(adapter) != 0)
 818                 goto out_free_irq;
 819
 820         // Do we support extended CDBs
 821         adapter->max_cdb_sz = 10;
 822         if (megaraid_mbox_extended_cdb(adapter) == 0) {
 823                 adapter->max_cdb_sz = 16;
 824         }
 825
 826         /*
 827          * Do we support cluster environment, if we do, what is the initiator
 828          * id.
 829          * NOTE: In a non-cluster aware firmware environment, the LLD should
 830          * return 7 as initiator id.
 831          */
 832         adapter->ha             = 0;
 833         adapter->init_id        = -1;
 834         if (megaraid_mbox_support_ha(adapter, &adapter->init_id) == 0) {
 835                 adapter->ha = 1;
 836         }
 837
 838         /*
 839          * Prepare the device ids array to have the mapping between the kernel
 840          * device address and megaraid device address.
 841          * We export the physical devices on their actual addresses. The
 842          * logical drives are exported on a virtual SCSI channel
 843          */
 844         megaraid_mbox_setup_device_map(adapter);
 845
 846         // If the firmware supports random deletion, update the device id map
 847         if (megaraid_mbox_support_random_del(adapter)) {
 848
 849                 // Change the logical drives numbers in device_ids array one
 850                 // slot in device_ids is reserved for target id, that's why
 851                 // "<=" below
 852                 for (i = 0; i <= MAX_LOGICAL_DRIVES_40LD; i++) {
 853                         adapter->device_ids[adapter->max_channel][i] += 0x80;
 854                 }
 855                 adapter->device_ids[adapter->max_channel][adapter->init_id] =
 856                         0xFF;
 857
 858                 raid_dev->random_del_supported = 1;
 859         }
 860
 861         /*
 862          * find out the maximum number of scatter-gather elements supported by
 863          * this firmware
 864          */
 865         adapter->sglen = megaraid_mbox_get_max_sg(adapter);
 866
 867         // enumerate RAID and SCSI channels so that all devices on SCSI
 868         // channels can later be exported, including disk devices
 869         megaraid_mbox_enum_raid_scsi(adapter);
 870
 871         /*
 872          * Other parameters required by upper layer
 873          *
 874          * maximum number of sectors per IO command
 875          */
 876         adapter->max_sectors = megaraid_max_sectors;
 877
 878         /*
 879          * number of queued commands per LUN.
 880          */
 881         adapter->cmd_per_lun = megaraid_cmd_per_lun;
 882
 883         /*
 884          * Allocate resources required to issue FW calls, when sysfs is
 885          * accessed
 886          */
 887         if (megaraid_sysfs_alloc_resources(adapter) != 0)
 888                 goto out_free_irq;
 889
 890         // Set the DMA mask to 64-bit. All supported controllers as capable of
 891         // DMA in this range
 892         pci_read_config_dword(adapter->pdev, PCI_CONF_AMISIG64, &magic64);
 893
 894         if (((magic64 == HBA_SIGNATURE_64_BIT) &&
 895                 ((adapter->pdev->subsystem_device !=
 896                 PCI_SUBSYS_ID_MEGARAID_SATA_150_6) &&
 897                 (adapter->pdev->subsystem_device !=
 898                 PCI_SUBSYS_ID_MEGARAID_SATA_150_4))) ||
 899                 (adapter->pdev->vendor == PCI_VENDOR_ID_LSI_LOGIC &&
 900                 adapter->pdev->device == PCI_DEVICE_ID_VERDE) ||
 901                 (adapter->pdev->vendor == PCI_VENDOR_ID_LSI_LOGIC &&
 902                 adapter->pdev->device == PCI_DEVICE_ID_DOBSON) ||
 903                 (adapter->pdev->vendor == PCI_VENDOR_ID_LSI_LOGIC &&
 904                 adapter->pdev->device == PCI_DEVICE_ID_LINDSAY) ||
 905                 (adapter->pdev->vendor == PCI_VENDOR_ID_DELL &&
 906                 adapter->pdev->device == PCI_DEVICE_ID_PERC4_DI_EVERGLADES) ||
 907                 (adapter->pdev->vendor == PCI_VENDOR_ID_DELL &&
 908                 adapter->pdev->device == PCI_DEVICE_ID_PERC4E_DI_KOBUK)) {
 909                 if (pci_set_dma_mask(adapter->pdev, DMA_BIT_MASK(64))) {
 910                         con_log(CL_ANN, (KERN_WARNING
 911                                 "megaraid: DMA mask for 64-bit failed\n"));
 912
 913                         if (pci_set_dma_mask (adapter->pdev, DMA_BIT_MASK(32))) {
 914                                 con_log(CL_ANN, (KERN_WARNING
 915                                         "megaraid: 32-bit DMA mask failed\n"));
 916                                 goto out_free_sysfs_res;
 917                         }
 918                 }
 919         }
 920
 921         // setup tasklet for DPC
 922         tasklet_init(&adapter->dpc_h, megaraid_mbox_dpc,
 923                         (unsigned long)adapter);
 924
 925         con_log(CL_DLEVEL1, (KERN_INFO
 926                 "megaraid mbox hba successfully initialized\n"));
 927
 928         return 0;
 929
 930 out_free_sysfs_res:
 931         megaraid_sysfs_free_resources(adapter);
 932 out_free_irq:
 933         free_irq(adapter->irq, adapter);
 934 out_alloc_cmds:
 935         megaraid_free_cmd_packets(adapter);
 936 out_iounmap:
 937         iounmap(raid_dev->baseaddr);
 938 out_release_regions:
 939         pci_release_regions(pdev);
 940 out_free_raid_dev:
 941         kfree(raid_dev);
 942
 943         return -1;
 944 }
 945
 946
 947 /**
 948  * megaraid_fini_mbox - undo controller initialization
 949  * @adapter             : our soft state
 950  */
 951 static void
 952 megaraid_fini_mbox(adapter_t *adapter)
 953 {
 954         mraid_device_t *raid_dev = ADAP2RAIDDEV(adapter);
 955
 956         // flush all caches
 957         megaraid_mbox_flush_cache(adapter);
 958
 959         tasklet_kill(&adapter->dpc_h);
 960
 961         megaraid_sysfs_free_resources(adapter);
 962
 963         megaraid_free_cmd_packets(adapter);
 964
 965         free_irq(adapter->irq, adapter);
 966
 967         iounmap(raid_dev->baseaddr);
 968
 969         pci_release_regions(adapter->pdev);
 970
 971         kfree(raid_dev);
 972
 973         return;
 974 }
 975
 976
 977 /**
 978  * megaraid_alloc_cmd_packets - allocate shared mailbox
 979  * @adapter             : soft state of the raid controller
 980  *
 981  * Allocate and align the shared mailbox. This maibox is used to issue
 982  * all the commands. For IO based controllers, the mailbox is also regsitered
 983  * with the FW. Allocate memory for all commands as well.
 984  * This is our big allocator.
 985  */
 986 static int
 987 megaraid_alloc_cmd_packets(adapter_t *adapter)
 988 {
 989         mraid_device_t          *raid_dev = ADAP2RAIDDEV(adapter);
 990         struct pci_dev          *pdev;
 991         unsigned long           align;
 992         scb_t                   *scb;
 993         mbox_ccb_t              *ccb;
 994         struct mraid_pci_blk    *epthru_pci_blk;
 995         struct mraid_pci_blk    *sg_pci_blk;
 996         struct mraid_pci_blk    *mbox_pci_blk;
 997         int                     i;
 998
 999         pdev = adapter->pdev;
1000
1001         /*
1002          * Setup the mailbox
1003          * Allocate the common 16-byte aligned memory for the handshake
1004          * mailbox.
1005          */
1006         raid_dev->una_mbox64 = pci_alloc_consistent(adapter->pdev,
1007                         sizeof(mbox64_t), &raid_dev->una_mbox64_dma);
1008
1009         if (!raid_dev->una_mbox64) {
1010                 con_log(CL_ANN, (KERN_WARNING
1011                         "megaraid: out of memory, %s %d\n", __func__,
1012                         __LINE__));
1013                 return -1;
1014         }
1015         memset(raid_dev->una_mbox64, 0, sizeof(mbox64_t));
1016
1017         /*
1018          * Align the mailbox at 16-byte boundary
1019          */
1020         raid_dev->mbox  = &raid_dev->una_mbox64->mbox32;
1021
1022         raid_dev->mbox  = (mbox_t *)((((unsigned long)raid_dev->mbox) + 15) &
1023                                 (~0UL ^ 0xFUL));
1024
1025         raid_dev->mbox64 = (mbox64_t *)(((unsigned long)raid_dev->mbox) - 8);
1026
1027         align = ((void *)raid_dev->mbox -
1028                         ((void *)&raid_dev->una_mbox64->mbox32));
1029
1030         raid_dev->mbox_dma = (unsigned long)raid_dev->una_mbox64_dma + 8 +
1031                         align;
1032
1033         // Allocate memory for commands issued internally
1034         adapter->ibuf = pci_alloc_consistent(pdev, MBOX_IBUF_SIZE,
1035                                 &adapter->ibuf_dma_h);
1036         if (!adapter->ibuf) {
1037
1038                 con_log(CL_ANN, (KERN_WARNING
1039                         "megaraid: out of memory, %s %d\n", __func__,
1040                         __LINE__));
1041
1042                 goto out_free_common_mbox;
1043         }
1044         memset(adapter->ibuf, 0, MBOX_IBUF_SIZE);
1045
1046         // Allocate memory for our SCSI Command Blocks and their associated
1047         // memory
1048
1049         /*
1050          * Allocate memory for the base list of scb. Later allocate memory for
1051          * CCBs and embedded components of each CCB and point the pointers in
1052          * scb to the allocated components
1053          * NOTE: The code to allocate SCB will be duplicated in all the LLD
1054          * since the calling routine does not yet know the number of available
1055          * commands.
1056          */
1057         adapter->kscb_list = kcalloc(MBOX_MAX_SCSI_CMDS, sizeof(scb_t), GFP_KERNEL);
1058
1059         if (adapter->kscb_list == NULL) {
1060                 con_log(CL_ANN, (KERN_WARNING
1061                         "megaraid: out of memory, %s %d\n", __func__,
1062                         __LINE__));
1063                 goto out_free_ibuf;
1064         }
1065
1066         // memory allocation for our command packets
1067         if (megaraid_mbox_setup_dma_pools(adapter) != 0) {
1068                 con_log(CL_ANN, (KERN_WARNING
1069                         "megaraid: out of memory, %s %d\n", __func__,
1070                         __LINE__));
1071                 goto out_free_scb_list;
1072         }
1073
1074         // Adjust the scb pointers and link in the free pool
1075         epthru_pci_blk  = raid_dev->epthru_pool;
1076         sg_pci_blk      = raid_dev->sg_pool;
1077         mbox_pci_blk    = raid_dev->mbox_pool;
1078
1079         for (i = 0; i < MBOX_MAX_SCSI_CMDS; i++) {
1080                 scb                     = adapter->kscb_list + i;
1081                 ccb                     = raid_dev->ccb_list + i;
1082
1083                 ccb->mbox       = (mbox_t *)(mbox_pci_blk[i].vaddr + 16);
1084                 ccb->raw_mbox   = (uint8_t *)ccb->mbox;
1085                 ccb->mbox64     = (mbox64_t *)(mbox_pci_blk[i].vaddr + 8);
1086                 ccb->mbox_dma_h = (unsigned long)mbox_pci_blk[i].dma_addr + 16;
1087
1088                 // make sure the mailbox is aligned properly
1089                 if (ccb->mbox_dma_h & 0x0F) {
1090                         con_log(CL_ANN, (KERN_CRIT
1091                                 "megaraid mbox: not aligned on 16-bytes\n"));
1092
1093                         goto out_teardown_dma_pools;
1094                 }
1095
1096                 ccb->epthru             = (mraid_epassthru_t *)
1097                                                 epthru_pci_blk[i].vaddr;
1098                 ccb->epthru_dma_h       = epthru_pci_blk[i].dma_addr;
1099                 ccb->pthru              = (mraid_passthru_t *)ccb->epthru;
1100                 ccb->pthru_dma_h        = ccb->epthru_dma_h;
1101
1102
1103                 ccb->sgl64              = (mbox_sgl64 *)sg_pci_blk[i].vaddr;
1104                 ccb->sgl_dma_h          = sg_pci_blk[i].dma_addr;
1105                 ccb->sgl32              = (mbox_sgl32 *)ccb->sgl64;
1106
1107                 scb->ccb                = (caddr_t)ccb;
1108                 scb->gp                 = 0;
1109
1110                 scb->sno                = i;    // command index
1111
1112                 scb->scp                = NULL;
1113                 scb->state              = SCB_FREE;
1114                 scb->dma_direction      = PCI_DMA_NONE;
1115                 scb->dma_type           = MRAID_DMA_NONE;
1116                 scb->dev_channel        = -1;
1117                 scb->dev_target         = -1;
1118
1119                 // put scb in the free pool
1120                 list_add_tail(&scb->list, &adapter->kscb_pool);
1121         }
1122
1123         return 0;
1124
1125 out_teardown_dma_pools:
1126         megaraid_mbox_teardown_dma_pools(adapter);
1127 out_free_scb_list:
1128         kfree(adapter->kscb_list);
1129 out_free_ibuf:
1130         pci_free_consistent(pdev, MBOX_IBUF_SIZE, (void *)adapter->ibuf,
1131                 adapter->ibuf_dma_h);
1132 out_free_common_mbox:
1133         pci_free_consistent(adapter->pdev, sizeof(mbox64_t),
1134                 (caddr_t)raid_dev->una_mbox64, raid_dev->una_mbox64_dma);
1135
1136         return -1;
1137 }
1138
1139
1140 /**
1141  * megaraid_free_cmd_packets - free memory
1142  * @adapter             : soft state of the raid controller
1143  *
1144  * Release memory resources allocated for commands.
1145  */
1146 static void
1147 megaraid_free_cmd_packets(adapter_t *adapter)
1148 {
1149         mraid_device_t *raid_dev = ADAP2RAIDDEV(adapter);
1150
1151         megaraid_mbox_teardown_dma_pools(adapter);
1152
1153         kfree(adapter->kscb_list);
1154
1155         pci_free_consistent(adapter->pdev, MBOX_IBUF_SIZE,
1156                 (void *)adapter->ibuf, adapter->ibuf_dma_h);
1157
1158         pci_free_consistent(adapter->pdev, sizeof(mbox64_t),
1159                 (caddr_t)raid_dev->una_mbox64, raid_dev->una_mbox64_dma);
1160         return;
1161 }
1162
1163
1164 /**
1165  * megaraid_mbox_setup_dma_pools - setup dma pool for command packets
1166  * @adapter             : HBA soft state
1167  *
1168  * Setup the dma pools for mailbox, passthru and extended passthru structures,
1169  * and scatter-gather lists.
1170  */
1171 static int
1172 megaraid_mbox_setup_dma_pools(adapter_t *adapter)
1173 {
1174         mraid_device_t          *raid_dev = ADAP2RAIDDEV(adapter);
1175         struct mraid_pci_blk    *epthru_pci_blk;
1176         struct mraid_pci_blk    *sg_pci_blk;
1177         struct mraid_pci_blk    *mbox_pci_blk;
1178         int                     i;
1179
1180
1181
1182         // Allocate memory for 16-bytes aligned mailboxes
1183         raid_dev->mbox_pool_handle = pci_pool_create("megaraid mbox pool",
1184                                                 adapter->pdev,
1185                                                 sizeof(mbox64_t) + 16,
1186                                                 16, 0);
1187
1188         if (raid_dev->mbox_pool_handle == NULL) {
1189                 goto fail_setup_dma_pool;
1190         }
1191
1192         mbox_pci_blk = raid_dev->mbox_pool;
1193         for (i = 0; i < MBOX_MAX_SCSI_CMDS; i++) {
1194                 mbox_pci_blk[i].vaddr = pci_pool_alloc(
1195                                                 raid_dev->mbox_pool_handle,
1196                                                 GFP_KERNEL,
1197                                                 &mbox_pci_blk[i].dma_addr);
1198                 if (!mbox_pci_blk[i].vaddr) {
1199                         goto fail_setup_dma_pool;
1200                 }
1201         }
1202
1203         /*
1204          * Allocate memory for each embedded passthru strucuture pointer
1205          * Request for a 128 bytes aligned structure for each passthru command
1206          * structure
1207          * Since passthru and extended passthru commands are exclusive, they
1208          * share common memory pool. Passthru structures piggyback on memory
1209          * allocted to extended passthru since passthru is smaller of the two
1210          */
1211         raid_dev->epthru_pool_handle = pci_pool_create("megaraid mbox pthru",
1212                         adapter->pdev, sizeof(mraid_epassthru_t), 128, 0);
1213
1214         if (raid_dev->epthru_pool_handle == NULL) {
1215                 goto fail_setup_dma_pool;
1216         }
1217
1218         epthru_pci_blk = raid_dev->epthru_pool;
1219         for (i = 0; i < MBOX_MAX_SCSI_CMDS; i++) {
1220                 epthru_pci_blk[i].vaddr = pci_pool_alloc(
1221                                                 raid_dev->epthru_pool_handle,
1222                                                 GFP_KERNEL,
1223                                                 &epthru_pci_blk[i].dma_addr);
1224                 if (!epthru_pci_blk[i].vaddr) {
1225                         goto fail_setup_dma_pool;
1226                 }
1227         }
1228
1229
1230         // Allocate memory for each scatter-gather list. Request for 512 bytes
1231         // alignment for each sg list
1232         raid_dev->sg_pool_handle = pci_pool_create("megaraid mbox sg",
1233                                         adapter->pdev,
1234                                         sizeof(mbox_sgl64) * MBOX_MAX_SG_SIZE,
1235                                         512, 0);
1236
1237         if (raid_dev->sg_pool_handle == NULL) {
1238                 goto fail_setup_dma_pool;
1239         }
1240
1241         sg_pci_blk = raid_dev->sg_pool;
1242         for (i = 0; i < MBOX_MAX_SCSI_CMDS; i++) {
1243                 sg_pci_blk[i].vaddr = pci_pool_alloc(
1244                                                 raid_dev->sg_pool_handle,
1245                                                 GFP_KERNEL,
1246                                                 &sg_pci_blk[i].dma_addr);
1247                 if (!sg_pci_blk[i].vaddr) {
1248                         goto fail_setup_dma_pool;
1249                 }
1250         }
1251
1252         return 0;
1253
1254 fail_setup_dma_pool:
1255         megaraid_mbox_teardown_dma_pools(adapter);
1256         return -1;
1257 }
1258
1259
1260 /**
1261  * megaraid_mbox_teardown_dma_pools - teardown dma pools for command packets
1262  * @adapter             : HBA soft state
1263  *
1264  * Teardown the dma pool for mailbox, passthru and extended passthru
1265  * structures, and scatter-gather lists.
1266  */
1267 static void
1268 megaraid_mbox_teardown_dma_pools(adapter_t *adapter)
1269 {
1270         mraid_device_t          *raid_dev = ADAP2RAIDDEV(adapter);
1271         struct mraid_pci_blk    *epthru_pci_blk;
1272         struct mraid_pci_blk    *sg_pci_blk;
1273         struct mraid_pci_blk    *mbox_pci_blk;
1274         int                     i;
1275
1276
1277         sg_pci_blk = raid_dev->sg_pool;
1278         for (i = 0; i < MBOX_MAX_SCSI_CMDS && sg_pci_blk[i].vaddr; i++) {
1279                 pci_pool_free(raid_dev->sg_pool_handle, sg_pci_blk[i].vaddr,
1280                         sg_pci_blk[i].dma_addr);
1281         }
1282         if (raid_dev->sg_pool_handle)
1283                 pci_pool_destroy(raid_dev->sg_pool_handle);
1284
1285
1286         epthru_pci_blk = raid_dev->epthru_pool;
1287         for (i = 0; i < MBOX_MAX_SCSI_CMDS && epthru_pci_blk[i].vaddr; i++) {
1288                 pci_pool_free(raid_dev->epthru_pool_handle,
1289                         epthru_pci_blk[i].vaddr, epthru_pci_blk[i].dma_addr);
1290         }
1291         if (raid_dev->epthru_pool_handle)
1292                 pci_pool_destroy(raid_dev->epthru_pool_handle);
1293
1294
1295         mbox_pci_blk = raid_dev->mbox_pool;
1296         for (i = 0; i < MBOX_MAX_SCSI_CMDS && mbox_pci_blk[i].vaddr; i++) {
1297                 pci_pool_free(raid_dev->mbox_pool_handle,
1298                         mbox_pci_blk[i].vaddr, mbox_pci_blk[i].dma_addr);
1299         }
1300         if (raid_dev->mbox_pool_handle)
1301                 pci_pool_destroy(raid_dev->mbox_pool_handle);
1302
1303         return;
1304 }
1305
1306
1307 /**
1308  * megaraid_alloc_scb - detach and return a scb from the free list
1309  * @adapter     : controller's soft state
1310  * @scp         : pointer to the scsi command to be executed
1311  *
1312  * Return the scb from the head of the free list. %NULL if there are none
1313  * available.
1314  */
1315 static scb_t *
1316 megaraid_alloc_scb(adapter_t *adapter, struct scsi_cmnd *scp)
1317 {
1318         struct list_head        *head = &adapter->kscb_pool;
1319         scb_t                   *scb = NULL;
1320         unsigned long           flags;
1321
1322         // detach scb from free pool
1323         spin_lock_irqsave(SCSI_FREE_LIST_LOCK(adapter), flags);
1324
1325         if (list_empty(head)) {
1326                 spin_unlock_irqrestore(SCSI_FREE_LIST_LOCK(adapter), flags);
1327                 return NULL;
1328         }
1329
1330         scb = list_entry(head->next, scb_t, list);
1331         list_del_init(&scb->list);
1332
1333         spin_unlock_irqrestore(SCSI_FREE_LIST_LOCK(adapter), flags);
1334
1335         scb->state      = SCB_ACTIVE;
1336         scb->scp        = scp;
1337         scb->dma_type   = MRAID_DMA_NONE;
1338
1339         return scb;
1340 }
1341
1342
1343 /**
1344  * megaraid_dealloc_scb - return the scb to the free pool
1345  * @adapter     : controller's soft state
1346  * @scb         : scb to be freed
1347  *
1348  * Return the scb back to the free list of scbs. The caller must 'flush' the
1349  * SCB before calling us. E.g., performing pci_unamp and/or pci_sync etc.
1350  * NOTE NOTE: Make sure the scb is not on any list before calling this
1351  * routine.
1352  */
1353 static inline void
1354 megaraid_dealloc_scb(adapter_t *adapter, scb_t *scb)
1355 {
1356         unsigned long           flags;
1357
1358         // put scb in the free pool
1359         scb->state      = SCB_FREE;
1360         scb->scp        = NULL;
1361         spin_lock_irqsave(SCSI_FREE_LIST_LOCK(adapter), flags);
1362
1363         list_add(&scb->list, &adapter->kscb_pool);
1364
1365         spin_unlock_irqrestore(SCSI_FREE_LIST_LOCK(adapter), flags);
1366
1367         return;
1368 }
1369
1370
1371 /**
1372  * megaraid_mbox_mksgl - make the scatter-gather list
1373  * @adapter     : controller's soft state
1374  * @scb         : scsi control block
1375  *
1376  * Prepare the scatter-gather list.
1377  */
1378 static int
1379 megaraid_mbox_mksgl(adapter_t *adapter, scb_t *scb)
1380 {
1381         struct scatterlist      *sgl;
1382         mbox_ccb_t              *ccb;
1383         struct scsi_cmnd        *scp;
1384         int                     sgcnt;
1385         int                     i;
1386
1387
1388         scp     = scb->scp;
1389         ccb     = (mbox_ccb_t *)scb->ccb;
1390
1391         sgcnt = scsi_dma_map(scp);
1392         BUG_ON(sgcnt < 0 || sgcnt > adapter->sglen);
1393
1394         // no mapping required if no data to be transferred
1395         if (!sgcnt)
1396                 return 0;
1397
1398         scb->dma_type = MRAID_DMA_WSG;
1399
1400         scsi_for_each_sg(scp, sgl, sgcnt, i) {
1401                 ccb->sgl64[i].address   = sg_dma_address(sgl);
1402                 ccb->sgl64[i].length    = sg_dma_len(sgl);
1403         }
1404
1405         // Return count of SG nodes
1406         return sgcnt;
1407 }
1408
1409
1410 /**
1411  * mbox_post_cmd - issue a mailbox command
1412  * @adapter     : controller's soft state
1413  * @scb         : command to be issued
1414  *
1415  * Post the command to the controller if mailbox is available.
1416  */
1417 static int
1418 mbox_post_cmd(adapter_t *adapter, scb_t *scb)
1419 {
1420         mraid_device_t  *raid_dev = ADAP2RAIDDEV(adapter);
1421         mbox64_t        *mbox64;
1422         mbox_t          *mbox;
1423         mbox_ccb_t      *ccb;
1424         unsigned long   flags;
1425         unsigned int    i = 0;
1426
1427
1428         ccb     = (mbox_ccb_t *)scb->ccb;
1429         mbox    = raid_dev->mbox;
1430         mbox64  = raid_dev->mbox64;
1431
1432         /*
1433          * Check for busy mailbox. If it is, return failure - the caller
1434          * should retry later.
1435          */
1436         spin_lock_irqsave(MAILBOX_LOCK(raid_dev), flags);
1437
1438         if (unlikely(mbox->busy)) {
1439                 do {
1440                         udelay(1);
1441                         i++;
1442                         rmb();
1443                 } while(mbox->busy && (i < max_mbox_busy_wait));
1444
1445                 if (mbox->busy) {
1446
1447                         spin_unlock_irqrestore(MAILBOX_LOCK(raid_dev), flags);
1448
1449                         return -1;
1450                 }
1451         }
1452
1453
1454         // Copy this command's mailbox data into "adapter's" mailbox
1455         memcpy((caddr_t)mbox64, (caddr_t)ccb->mbox64, 22);
1456         mbox->cmdid = scb->sno;
1457
1458         adapter->outstanding_cmds++;
1459
1460         if (scb->dma_direction == PCI_DMA_TODEVICE)
1461                 pci_dma_sync_sg_for_device(adapter->pdev,
1462                                            scsi_sglist(scb->scp),
1463                                            scsi_sg_count(scb->scp),
1464                                            PCI_DMA_TODEVICE);
1465
1466         mbox->busy      = 1;    // Set busy
1467         mbox->poll      = 0;
1468         mbox->ack       = 0;
1469         wmb();
1470
1471         WRINDOOR(raid_dev, raid_dev->mbox_dma | 0x1);
1472
1473         spin_unlock_irqrestore(MAILBOX_LOCK(raid_dev), flags);
1474
1475         return 0;
1476 }
1477
1478
1479 /**
1480  * megaraid_queue_command - generic queue entry point for all LLDs
1481  * @scp         : pointer to the scsi command to be executed
1482  * @done        : callback routine to be called after the cmd has be completed
1483  *
1484  * Queue entry point for mailbox based controllers.
1485  */
1486 static int
1487 megaraid_queue_command_lck(struct scsi_cmnd *scp, void (*done)(struct scsi_cmnd *))
1488 {
1489         adapter_t       *adapter;
1490         scb_t           *scb;
1491         int             if_busy;
1492
1493         adapter         = SCP2ADAPTER(scp);
1494         scp->scsi_done  = done;
1495         scp->result     = 0;
1496
1497         /*
1498          * Allocate and build a SCB request
1499          * if_busy flag will be set if megaraid_mbox_build_cmd() command could
1500          * not allocate scb. We will return non-zero status in that case.
1501          * NOTE: scb can be null even though certain commands completed
1502          * successfully, e.g., MODE_SENSE and TEST_UNIT_READY, it would
1503          * return 0 in that case, and we would do the callback right away.
1504          */
1505         if_busy = 0;
1506         scb = megaraid_mbox_build_cmd(adapter, scp, &if_busy);
1507         if (!scb) {     // command already completed
1508                 done(scp);
1509                 return 0;
1510         }
1511
1512         megaraid_mbox_runpendq(adapter, scb);
1513         return if_busy;
1514 }
1515
1516 static DEF_SCSI_QCMD(megaraid_queue_command)
1517
1518 /**
1519  * megaraid_mbox_build_cmd - transform the mid-layer scsi commands
1520  * @adapter     : controller's soft state
1521  * @scp         : mid-layer scsi command pointer
1522  * @busy        : set if request could not be completed because of lack of
1523  *              resources
1524  *
1525  * Transform the mid-layer scsi command to megaraid firmware lingua.
1526  * Convert the command issued by mid-layer to format understood by megaraid
1527  * firmware. We also complete certain commands without sending them to firmware.
1528  */
1529 static scb_t *
1530 megaraid_mbox_build_cmd(adapter_t *adapter, struct scsi_cmnd *scp, int *busy)
1531 {
1532         mraid_device_t          *rdev = ADAP2RAIDDEV(adapter);
1533         int                     channel;
1534         int                     target;
1535         int                     islogical;
1536         mbox_ccb_t              *ccb;
1537         mraid_passthru_t        *pthru;
1538         mbox64_t                *mbox64;
1539         mbox_t                  *mbox;
1540         scb_t                   *scb;
1541         char                    skip[] = "skipping";
1542         char                    scan[] = "scanning";
1543         char                    *ss;
1544
1545
1546         /*
1547          * Get the appropriate device map for the device this command is
1548          * intended for
1549          */
1550         MRAID_GET_DEVICE_MAP(adapter, scp, channel, target, islogical);
1551
1552         /*
1553          * Logical drive commands
1554          */
1555         if (islogical) {
1556                 switch (scp->cmnd[0]) {
1557                 case TEST_UNIT_READY:
1558                         /*
1559                          * Do we support clustering and is the support enabled
1560                          * If no, return success always
1561                          */
1562                         if (!adapter->ha) {
1563                                 scp->result = (DID_OK << 16);
1564                                 return NULL;
1565                         }
1566
1567                         if (!(scb = megaraid_alloc_scb(adapter, scp))) {
1568                                 scp->result = (DID_ERROR << 16);
1569                                 *busy = 1;
1570                                 return NULL;
1571                         }
1572
1573                         scb->dma_direction      = scp->sc_data_direction;
1574                         scb->dev_channel        = 0xFF;
1575                         scb->dev_target         = target;
1576                         ccb                     = (mbox_ccb_t *)scb->ccb;
1577
1578                         /*
1579                          * The command id will be provided by the command
1580                          * issuance routine
1581                          */
1582                         ccb->raw_mbox[0]        = CLUSTER_CMD;
1583                         ccb->raw_mbox[2]        = RESERVATION_STATUS;
1584                         ccb->raw_mbox[3]        = target;
1585
1586                         return scb;
1587
1588                 case MODE_SENSE:
1589                 {
1590                         struct scatterlist      *sgl;
1591                         caddr_t                 vaddr;
1592
1593                         sgl = scsi_sglist(scp);
1594                         if (sg_page(sgl)) {
1595                                 vaddr = (caddr_t) sg_virt(&sgl[0]);
1596
1597                                 memset(vaddr, 0, scp->cmnd[4]);
1598                         }
1599                         else {
1600                                 con_log(CL_ANN, (KERN_WARNING
1601                                                  "megaraid mailbox: invalid sg:%d\n",
1602                                                  __LINE__));
1603                         }
1604                 }
1605                 scp->result = (DID_OK << 16);
1606                 return NULL;
1607
1608                 case INQUIRY:
1609                         /*
1610                          * Display the channel scan for logical drives
1611                          * Do not display scan for a channel if already done.
1612                          */
1613                         if (!(rdev->last_disp & (1L << SCP2CHANNEL(scp)))) {
1614
1615                                 con_log(CL_ANN, (KERN_INFO
1616                                         "scsi[%d]: scanning scsi channel %d",
1617                                         adapter->host->host_no,
1618                                         SCP2CHANNEL(scp)));
1619
1620                                 con_log(CL_ANN, (
1621                                         " [virtual] for logical drives\n"));
1622
1623                                 rdev->last_disp |= (1L << SCP2CHANNEL(scp));
1624                         }
1625
1626                         if (scp->cmnd[1] & MEGA_SCSI_INQ_EVPD) {
1627                                 scp->sense_buffer[0] = 0x70;
1628                                 scp->sense_buffer[2] = ILLEGAL_REQUEST;
1629                                 scp->sense_buffer[12] = MEGA_INVALID_FIELD_IN_CDB;
1630                                 scp->result = CHECK_CONDITION << 1;
1631                                 return NULL;
1632                         }
1633
1634                         /* Fall through */
1635
1636                 case READ_CAPACITY:
1637                         /*
1638                          * Do not allow LUN > 0 for logical drives and
1639                          * requests for more than 40 logical drives
1640                          */
1641                         if (SCP2LUN(scp)) {
1642                                 scp->result = (DID_BAD_TARGET << 16);
1643                                 return NULL;
1644                         }
1645                         if ((target % 0x80) >= MAX_LOGICAL_DRIVES_40LD) {
1646                                 scp->result = (DID_BAD_TARGET << 16);
1647                                 return NULL;
1648                         }
1649
1650
1651                         /* Allocate a SCB and initialize passthru */
1652                         if (!(scb = megaraid_alloc_scb(adapter, scp))) {
1653                                 scp->result = (DID_ERROR << 16);
1654                                 *busy = 1;
1655                                 return NULL;
1656                         }
1657
1658                         ccb                     = (mbox_ccb_t *)scb->ccb;
1659                         scb->dev_channel        = 0xFF;
1660                         scb->dev_target         = target;
1661                         pthru                   = ccb->pthru;
1662                         mbox                    = ccb->mbox;
1663                         mbox64                  = ccb->mbox64;
1664
1665                         pthru->timeout          = 0;
1666                         pthru->ars              = 1;
1667                         pthru->reqsenselen      = 14;
1668                         pthru->islogical        = 1;
1669                         pthru->logdrv           = target;
1670                         pthru->cdblen           = scp->cmd_len;
1671                         memcpy(pthru->cdb, scp->cmnd, scp->cmd_len);
1672
1673                         mbox->cmd               = MBOXCMD_PASSTHRU64;
1674                         scb->dma_direction      = scp->sc_data_direction;
1675
1676                         pthru->dataxferlen      = scsi_bufflen(scp);
1677                         pthru->dataxferaddr     = ccb->sgl_dma_h;
1678                         pthru->numsge           = megaraid_mbox_mksgl(adapter,
1679                                                         scb);
1680
1681                         mbox->xferaddr          = 0xFFFFFFFF;
1682                         mbox64->xferaddr_lo     = (uint32_t )ccb->pthru_dma_h;
1683                         mbox64->xferaddr_hi     = 0;
1684
1685                         return scb;
1686
1687                 case READ_6:
1688                 case WRITE_6:
1689                 case READ_10:
1690                 case WRITE_10:
1691                 case READ_12:
1692                 case WRITE_12:
1693
1694                         /*
1695                          * Allocate a SCB and initialize mailbox
1696                          */
1697                         if (!(scb = megaraid_alloc_scb(adapter, scp))) {
1698                                 scp->result = (DID_ERROR << 16);
1699                                 *busy = 1;
1700                                 return NULL;
1701                         }
1702                         ccb                     = (mbox_ccb_t *)scb->ccb;
1703                         scb->dev_channel        = 0xFF;
1704                         scb->dev_target         = target;
1705                         mbox                    = ccb->mbox;
1706                         mbox64                  = ccb->mbox64;
1707                         mbox->logdrv            = target;
1708
1709                         /*
1710                          * A little HACK: 2nd bit is zero for all scsi read
1711                          * commands and is set for all scsi write commands
1712                          */
1713                         mbox->cmd = (scp->cmnd[0] & 0x02) ?  MBOXCMD_LWRITE64:
1714                                         MBOXCMD_LREAD64 ;
1715
1716                         /*
1717                          * 6-byte READ(0x08) or WRITE(0x0A) cdb
1718                          */
1719                         if (scp->cmd_len == 6) {
1720                                 mbox->numsectors = (uint32_t)scp->cmnd[4];
1721                                 mbox->lba =
1722                                         ((uint32_t)scp->cmnd[1] << 16)  |
1723                                         ((uint32_t)scp->cmnd[2] << 8)   |
1724                                         (uint32_t)scp->cmnd[3];
1725
1726                                 mbox->lba &= 0x1FFFFF;
1727                         }
1728
1729                         /*
1730                          * 10-byte READ(0x28) or WRITE(0x2A) cdb
1731                          */
1732                         else if (scp->cmd_len == 10) {
1733                                 mbox->numsectors =
1734                                         (uint32_t)scp->cmnd[8] |
1735                                         ((uint32_t)scp->cmnd[7] << 8);
1736                                 mbox->lba =
1737                                         ((uint32_t)scp->cmnd[2] << 24) |
1738                                         ((uint32_t)scp->cmnd[3] << 16) |
1739                                         ((uint32_t)scp->cmnd[4] << 8) |
1740                                         (uint32_t)scp->cmnd[5];
1741                         }
1742
1743                         /*
1744                          * 12-byte READ(0xA8) or WRITE(0xAA) cdb
1745                          */
1746                         else if (scp->cmd_len == 12) {
1747                                 mbox->lba =
1748                                         ((uint32_t)scp->cmnd[2] << 24) |
1749                                         ((uint32_t)scp->cmnd[3] << 16) |
1750                                         ((uint32_t)scp->cmnd[4] << 8) |
1751                                         (uint32_t)scp->cmnd[5];
1752
1753                                 mbox->numsectors =
1754                                         ((uint32_t)scp->cmnd[6] << 24) |
1755                                         ((uint32_t)scp->cmnd[7] << 16) |
1756                                         ((uint32_t)scp->cmnd[8] << 8) |
1757                                         (uint32_t)scp->cmnd[9];
1758                         }
1759                         else {
1760                                 con_log(CL_ANN, (KERN_WARNING
1761                                         "megaraid: unsupported CDB length\n"));
1762
1763                                 megaraid_dealloc_scb(adapter, scb);
1764
1765                                 scp->result = (DID_ERROR << 16);
1766                                 return NULL;
1767                         }
1768
1769                         scb->dma_direction = scp->sc_data_direction;
1770
1771                         // Calculate Scatter-Gather info
1772                         mbox64->xferaddr_lo     = (uint32_t )ccb->sgl_dma_h;
1773                         mbox->numsge            = megaraid_mbox_mksgl(adapter,
1774                                                         scb);
1775                         mbox->xferaddr          = 0xFFFFFFFF;
1776                         mbox64->xferaddr_hi     = 0;
1777
1778                         return scb;
1779
1780                 case RESERVE:
1781                 case RELEASE:
1782                         /*
1783                          * Do we support clustering and is the support enabled
1784                          */
1785                         if (!adapter->ha) {
1786                                 scp->result = (DID_BAD_TARGET << 16);
1787                                 return NULL;
1788                         }
1789
1790                         /*
1791                          * Allocate a SCB and initialize mailbox
1792                          */
1793                         if (!(scb = megaraid_alloc_scb(adapter, scp))) {
1794                                 scp->result = (DID_ERROR << 16);
1795                                 *busy = 1;
1796                                 return NULL;
1797                         }
1798
1799                         ccb                     = (mbox_ccb_t *)scb->ccb;
1800                         scb->dev_channel        = 0xFF;
1801                         scb->dev_target         = target;
1802                         ccb->raw_mbox[0]        = CLUSTER_CMD;
1803                         ccb->raw_mbox[2]        =  (scp->cmnd[0] == RESERVE) ?
1804                                                 RESERVE_LD : RELEASE_LD;
1805
1806                         ccb->raw_mbox[3]        = target;
1807                         scb->dma_direction      = scp->sc_data_direction;
1808
1809                         return scb;
1810
1811                 default:
1812                         scp->result = (DID_BAD_TARGET << 16);
1813                         return NULL;
1814                 }
1815         }
1816         else { // Passthru device commands
1817
1818                 // Do not allow access to target id > 15 or LUN > 7
1819                 if (target > 15 || SCP2LUN(scp) > 7) {
1820                         scp->result = (DID_BAD_TARGET << 16);
1821                         return NULL;
1822                 }
1823
1824                 // if fast load option was set and scan for last device is
1825                 // over, reset the fast_load flag so that during a possible
1826                 // next scan, devices can be made available
1827                 if (rdev->fast_load && (target == 15) &&
1828                         (SCP2CHANNEL(scp) == adapter->max_channel -1)) {
1829
1830                         con_log(CL_ANN, (KERN_INFO
1831                         "megaraid[%d]: physical device scan re-enabled\n",
1832                                 adapter->host->host_no));
1833                         rdev->fast_load = 0;
1834                 }
1835
1836                 /*
1837                  * Display the channel scan for physical devices
1838                  */
1839                 if (!(rdev->last_disp & (1L << SCP2CHANNEL(scp)))) {
1840
1841                         ss = rdev->fast_load ? skip : scan;
1842
1843                         con_log(CL_ANN, (KERN_INFO
1844                                 "scsi[%d]: %s scsi channel %d [Phy %d]",
1845                                 adapter->host->host_no, ss, SCP2CHANNEL(scp),
1846                                 channel));
1847
1848                         con_log(CL_ANN, (
1849                                 " for non-raid devices\n"));
1850
1851                         rdev->last_disp |= (1L << SCP2CHANNEL(scp));
1852                 }
1853
1854                 // disable channel sweep if fast load option given
1855                 if (rdev->fast_load) {
1856                         scp->result = (DID_BAD_TARGET << 16);
1857                         return NULL;
1858                 }
1859
1860                 // Allocate a SCB and initialize passthru
1861                 if (!(scb = megaraid_alloc_scb(adapter, scp))) {
1862                         scp->result = (DID_ERROR << 16);
1863                         *busy = 1;
1864                         return NULL;
1865                 }
1866
1867                 ccb                     = (mbox_ccb_t *)scb->ccb;
1868                 scb->dev_channel        = channel;
1869                 scb->dev_target         = target;
1870                 scb->dma_direction      = scp->sc_data_direction;
1871                 mbox                    = ccb->mbox;
1872                 mbox64                  = ccb->mbox64;
1873
1874                 // Does this firmware support extended CDBs
1875                 if (adapter->max_cdb_sz == 16) {
1876                         mbox->cmd               = MBOXCMD_EXTPTHRU;
1877
1878                         megaraid_mbox_prepare_epthru(adapter, scb, scp);
1879
1880                         mbox64->xferaddr_lo     = (uint32_t)ccb->epthru_dma_h;
1881                         mbox64->xferaddr_hi     = 0;
1882                         mbox->xferaddr          = 0xFFFFFFFF;
1883                 }
1884                 else {
1885                         mbox->cmd = MBOXCMD_PASSTHRU64;
1886
1887                         megaraid_mbox_prepare_pthru(adapter, scb, scp);
1888
1889                         mbox64->xferaddr_lo     = (uint32_t)ccb->pthru_dma_h;
1890                         mbox64->xferaddr_hi     = 0;
1891                         mbox->xferaddr          = 0xFFFFFFFF;
1892                 }
1893                 return scb;
1894         }
1895
1896         // NOT REACHED
1897 }
1898
1899
1900 /**
1901  * megaraid_mbox_runpendq - execute commands queued in the pending queue
1902  * @adapter     : controller's soft state
1903  * @scb_q       : SCB to be queued in the pending list
1904  *
1905  * Scan the pending list for commands which are not yet issued and try to
1906  * post to the controller. The SCB can be a null pointer, which would indicate
1907  * no SCB to be queue, just try to execute the ones in the pending list.
1908  *
1909  * NOTE: We do not actually traverse the pending list. The SCBs are plucked
1910  * out from the head of the pending list. If it is successfully issued, the
1911  * next SCB is at the head now.
1912  */
1913 static void
1914 megaraid_mbox_runpendq(adapter_t *adapter, scb_t *scb_q)
1915 {
1916         scb_t                   *scb;
1917         unsigned long           flags;
1918
1919         spin_lock_irqsave(PENDING_LIST_LOCK(adapter), flags);
1920
1921         if (scb_q) {
1922                 scb_q->state = SCB_PENDQ;
1923                 list_add_tail(&scb_q->list, &adapter->pend_list);
1924         }
1925
1926         // if the adapter in not in quiescent mode, post the commands to FW
1927         if (adapter->quiescent) {
1928                 spin_unlock_irqrestore(PENDING_LIST_LOCK(adapter), flags);
1929                 return;
1930         }
1931
1932         while (!list_empty(&adapter->pend_list)) {
1933
1934                 assert_spin_locked(PENDING_LIST_LOCK(adapter));
1935
1936                 scb = list_entry(adapter->pend_list.next, scb_t, list);
1937
1938                 // remove the scb from the pending list and try to
1939                 // issue. If we are unable to issue it, put back in
1940                 // the pending list and return
1941
1942                 list_del_init(&scb->list);
1943
1944                 spin_unlock_irqrestore(PENDING_LIST_LOCK(adapter), flags);
1945
1946                 // if mailbox was busy, return SCB back to pending
1947                 // list. Make sure to add at the head, since that's
1948                 // where it would have been removed from
1949
1950                 scb->state = SCB_ISSUED;
1951
1952                 if (mbox_post_cmd(adapter, scb) != 0) {
1953
1954                         spin_lock_irqsave(PENDING_LIST_LOCK(adapter), flags);
1955
1956                         scb->state = SCB_PENDQ;
1957
1958                         list_add(&scb->list, &adapter->pend_list);
1959
1960                         spin_unlock_irqrestore(PENDING_LIST_LOCK(adapter),
1961                                 flags);
1962
1963                         return;
1964                 }
1965
1966                 spin_lock_irqsave(PENDING_LIST_LOCK(adapter), flags);
1967         }
1968
1969         spin_unlock_irqrestore(PENDING_LIST_LOCK(adapter), flags);
1970
1971
1972         return;
1973 }
1974
1975
1976 /**
1977  * megaraid_mbox_prepare_pthru - prepare a command for physical devices
1978  * @adapter     : pointer to controller's soft state
1979  * @scb         : scsi control block
1980  * @scp         : scsi command from the mid-layer
1981  *
1982  * Prepare a command for the scsi physical devices.
1983  */
1984 static void
1985 megaraid_mbox_prepare_pthru(adapter_t *adapter, scb_t *scb,
1986                 struct scsi_cmnd *scp)
1987 {
1988         mbox_ccb_t              *ccb;
1989         mraid_passthru_t        *pthru;
1990         uint8_t                 channel;
1991         uint8_t                 target;
1992
1993         ccb     = (mbox_ccb_t *)scb->ccb;
1994         pthru   = ccb->pthru;
1995         channel = scb->dev_channel;
1996         target  = scb->dev_target;
1997
1998         // 0=6sec, 1=60sec, 2=10min, 3=3hrs, 4=NO timeout
1999         pthru->timeout          = 4;
2000         pthru->ars              = 1;
2001         pthru->islogical        = 0;
2002         pthru->channel          = 0;
2003         pthru->target           = (channel << 4) | target;
2004         pthru->logdrv           = SCP2LUN(scp);
2005         pthru->reqsenselen      = 14;
2006         pthru->cdblen           = scp->cmd_len;
2007
2008         memcpy(pthru->cdb, scp->cmnd, scp->cmd_len);
2009
2010         if (scsi_bufflen(scp)) {
2011                 pthru->dataxferlen      = scsi_bufflen(scp);
2012                 pthru->dataxferaddr     = ccb->sgl_dma_h;
2013                 pthru->numsge           = megaraid_mbox_mksgl(adapter, scb);
2014         }
2015         else {
2016                 pthru->dataxferaddr     = 0;
2017                 pthru->dataxferlen      = 0;
2018                 pthru->numsge           = 0;
2019         }
2020         return;
2021 }
2022
2023
2024 /**
2025  * megaraid_mbox_prepare_epthru - prepare a command for physical devices
2026  * @adapter     : pointer to controller's soft state
2027  * @scb         : scsi control block
2028  * @scp         : scsi command from the mid-layer
2029  *
2030  * Prepare a command for the scsi physical devices. This rountine prepares
2031  * commands for devices which can take extended CDBs (>10 bytes).
2032  */
2033 static void
2034 megaraid_mbox_prepare_epthru(adapter_t *adapter, scb_t *scb,
2035                 struct scsi_cmnd *scp)
2036 {
2037         mbox_ccb_t              *ccb;
2038         mraid_epassthru_t       *epthru;
2039         uint8_t                 channel;
2040         uint8_t                 target;
2041
2042         ccb     = (mbox_ccb_t *)scb->ccb;
2043         epthru  = ccb->epthru;
2044         channel = scb->dev_channel;
2045         target  = scb->dev_target;
2046
2047         // 0=6sec, 1=60sec, 2=10min, 3=3hrs, 4=NO timeout
2048         epthru->timeout         = 4;
2049         epthru->ars             = 1;
2050         epthru->islogical       = 0;
2051         epthru->channel         = 0;
2052         epthru->target          = (channel << 4) | target;
2053         epthru->logdrv          = SCP2LUN(scp);
2054         epthru->reqsenselen     = 14;
2055         epthru->cdblen          = scp->cmd_len;
2056
2057         memcpy(epthru->cdb, scp->cmnd, scp->cmd_len);
2058
2059         if (scsi_bufflen(scp)) {
2060                 epthru->dataxferlen     = scsi_bufflen(scp);
2061                 epthru->dataxferaddr    = ccb->sgl_dma_h;
2062                 epthru->numsge          = megaraid_mbox_mksgl(adapter, scb);
2063         }
2064         else {
2065                 epthru->dataxferaddr    = 0;
2066                 epthru->dataxferlen     = 0;
2067                 epthru->numsge          = 0;
2068         }
2069         return;
2070 }
2071
2072
2073 /**
2074  * megaraid_ack_sequence - interrupt ack sequence for memory mapped HBAs
2075  * @adapter     : controller's soft state
2076  *
2077  * Interrupt acknowledgement sequence for memory mapped HBAs. Find out the
2078  * completed command and put them on the completed list for later processing.
2079  *
2080  * Returns:     1 if the interrupt is valid, 0 otherwise
2081  */
2082 static int
2083 megaraid_ack_sequence(adapter_t *adapter)
2084 {
2085         mraid_device_t          *raid_dev = ADAP2RAIDDEV(adapter);
2086         mbox_t                  *mbox;
2087         scb_t                   *scb;
2088         uint8_t                 nstatus;
2089         uint8_t                 completed[MBOX_MAX_FIRMWARE_STATUS];
2090         struct list_head        clist;
2091         int                     handled;
2092         uint32_t                dword;
2093         unsigned long           flags;
2094         int                     i, j;
2095
2096
2097         mbox    = raid_dev->mbox;
2098
2099         // move the SCBs from the firmware completed array to our local list
2100         INIT_LIST_HEAD(&clist);
2101
2102         // loop till F/W has more commands for us to complete
2103         handled = 0;
2104         spin_lock_irqsave(MAILBOX_LOCK(raid_dev), flags);
2105         do {
2106                 /*
2107                  * Check if a valid interrupt is pending. If found, force the
2108                  * interrupt line low.
2109                  */
2110                 dword = RDOUTDOOR(raid_dev);
2111                 if (dword != 0x10001234) break;
2112
2113                 handled = 1;
2114
2115                 WROUTDOOR(raid_dev, 0x10001234);
2116
2117                 nstatus = 0;
2118                 // wait for valid numstatus to post
2119                 for (i = 0; i < 0xFFFFF; i++) {
2120                         if (mbox->numstatus != 0xFF) {
2121                                 nstatus = mbox->numstatus;
2122                                 break;
2123                         }
2124                         rmb();
2125                 }
2126                 mbox->numstatus = 0xFF;
2127
2128                 adapter->outstanding_cmds -= nstatus;
2129
2130                 for (i = 0; i < nstatus; i++) {
2131
2132                         // wait for valid command index to post
2133                         for (j = 0; j < 0xFFFFF; j++) {
2134                                 if (mbox->completed[i] != 0xFF) break;
2135                                 rmb();
2136                         }
2137                         completed[i]            = mbox->completed[i];
2138                         mbox->completed[i]      = 0xFF;
2139
2140                         if (completed[i] == 0xFF) {
2141                                 con_log(CL_ANN, (KERN_CRIT
2142                                 "megaraid: command posting timed out\n"));
2143
2144                                 BUG();
2145                                 continue;
2146                         }
2147
2148                         // Get SCB associated with this command id
2149                         if (completed[i] >= MBOX_MAX_SCSI_CMDS) {
2150                                 // a cmm command
2151                                 scb = adapter->uscb_list + (completed[i] -
2152                                                 MBOX_MAX_SCSI_CMDS);
2153                         }
2154                         else {
2155                                 // an os command
2156                                 scb = adapter->kscb_list + completed[i];
2157                         }
2158
2159                         scb->status = mbox->status;
2160                         list_add_tail(&scb->list, &clist);
2161                 }
2162
2163                 // Acknowledge interrupt
2164                 WRINDOOR(raid_dev, 0x02);
2165
2166         } while(1);
2167
2168         spin_unlock_irqrestore(MAILBOX_LOCK(raid_dev), flags);
2169
2170
2171         // put the completed commands in the completed list. DPC would
2172         // complete these commands later
2173         spin_lock_irqsave(COMPLETED_LIST_LOCK(adapter), flags);
2174
2175         list_splice(&clist, &adapter->completed_list);
2176
2177         spin_unlock_irqrestore(COMPLETED_LIST_LOCK(adapter), flags);
2178
2179
2180         // schedule the DPC if there is some work for it
2181         if (handled)
2182                 tasklet_schedule(&adapter->dpc_h);
2183
2184         return handled;
2185 }
2186
2187
2188 /**
2189  * megaraid_isr - isr for memory based mailbox based controllers
2190  * @irq         : irq
2191  * @devp        : pointer to our soft state
2192  *
2193  * Interrupt service routine for memory-mapped mailbox controllers.
2194  */
2195 static irqreturn_t
2196 megaraid_isr(int irq, void *devp)
2197 {
2198         adapter_t       *adapter = devp;
2199         int             handled;
2200
2201         handled = megaraid_ack_sequence(adapter);
2202
2203         /* Loop through any pending requests */
2204         if (!adapter->quiescent) {
2205                 megaraid_mbox_runpendq(adapter, NULL);
2206         }
2207
2208         return IRQ_RETVAL(handled);
2209 }
2210
2211
2212 /**
2213  * megaraid_mbox_sync_scb - sync kernel buffers
2214  * @adapter     : controller's soft state
2215  * @scb         : pointer to the resource packet
2216  *
2217  * DMA sync if required.
2218  */
2219 static void
2220 megaraid_mbox_sync_scb(adapter_t *adapter, scb_t *scb)
2221 {
2222         mbox_ccb_t      *ccb;
2223
2224         ccb     = (mbox_ccb_t *)scb->ccb;
2225
2226         if (scb->dma_direction == PCI_DMA_FROMDEVICE)
2227                 pci_dma_sync_sg_for_cpu(adapter->pdev,
2228                                         scsi_sglist(scb->scp),
2229                                         scsi_sg_count(scb->scp),
2230                                         PCI_DMA_FROMDEVICE);
2231
2232         scsi_dma_unmap(scb->scp);
2233         return;
2234 }
2235
2236
2237 /**
2238  * megaraid_mbox_dpc - the tasklet to complete the commands from completed list
2239  * @devp        : pointer to HBA soft state
2240  *
2241  * Pick up the commands from the completed list and send back to the owners.
2242  * This is a reentrant function and does not assume any locks are held while
2243  * it is being called.
2244  */
2245 static void
2246 megaraid_mbox_dpc(unsigned long devp)
2247 {
2248         adapter_t               *adapter = (adapter_t *)devp;
2249         mraid_device_t          *raid_dev;
2250         struct list_head        clist;
2251         struct scatterlist      *sgl;
2252         scb_t                   *scb;
2253         scb_t                   *tmp;
2254         struct scsi_cmnd        *scp;
2255         mraid_passthru_t        *pthru;
2256         mraid_epassthru_t       *epthru;
2257         mbox_ccb_t              *ccb;
2258         int                     islogical;
2259         int                     pdev_index;
2260         int                     pdev_state;
2261         mbox_t                  *mbox;
2262         unsigned long           flags;
2263         uint8_t                 c;
2264         int                     status;
2265         uioc_t                  *kioc;
2266
2267
2268         if (!adapter) return;
2269
2270         raid_dev = ADAP2RAIDDEV(adapter);
2271
2272         // move the SCBs from the completed list to our local list
2273         INIT_LIST_HEAD(&clist);
2274
2275         spin_lock_irqsave(COMPLETED_LIST_LOCK(adapter), flags);
2276
2277         list_splice_init(&adapter->completed_list, &clist);
2278
2279         spin_unlock_irqrestore(COMPLETED_LIST_LOCK(adapter), flags);
2280
2281
2282         list_for_each_entry_safe(scb, tmp, &clist, list) {
2283
2284                 status          = scb->status;
2285                 scp             = scb->scp;
2286                 ccb             = (mbox_ccb_t *)scb->ccb;
2287                 pthru           = ccb->pthru;
2288                 epthru          = ccb->epthru;
2289                 mbox            = ccb->mbox;
2290
2291                 // Make sure f/w has completed a valid command
2292                 if (scb->state != SCB_ISSUED) {
2293                         con_log(CL_ANN, (KERN_CRIT
2294                         "megaraid critical err: invalid command %d:%d:%p\n",
2295                                 scb->sno, scb->state, scp));
2296                         BUG();
2297                         continue;       // Must never happen!
2298                 }
2299
2300                 // check for the management command and complete it right away
2301                 if (scb->sno >= MBOX_MAX_SCSI_CMDS) {
2302                         scb->state      = SCB_FREE;
2303                         scb->status     = status;
2304
2305                         // remove from local clist
2306                         list_del_init(&scb->list);
2307
2308                         kioc                    = (uioc_t *)scb->gp;
2309                         kioc->status            = 0;
2310
2311                         megaraid_mbox_mm_done(adapter, scb);
2312
2313                         continue;
2314                 }
2315
2316                 // Was an abort issued for this command earlier
2317                 if (scb->state & SCB_ABORT) {
2318                         con_log(CL_ANN, (KERN_NOTICE
2319                         "megaraid: aborted cmd [%x] completed\n",
2320                                 scb->sno));
2321                 }
2322
2323                 /*
2324                  * If the inquiry came of a disk drive which is not part of
2325                  * any RAID array, expose it to the kernel. For this to be
2326                  * enabled, user must set the "megaraid_expose_unconf_disks"
2327                  * flag to 1 by specifying it on module parameter list.
2328                  * This would enable data migration off drives from other
2329                  * configurations.
2330                  */
2331                 islogical = MRAID_IS_LOGICAL(adapter, scp);
2332                 if (scp->cmnd[0] == INQUIRY && status == 0 && islogical == 0
2333                                 && IS_RAID_CH(raid_dev, scb->dev_channel)) {
2334
2335                         sgl = scsi_sglist(scp);
2336                         if (sg_page(sgl)) {
2337                                 c = *(unsigned char *) sg_virt(&sgl[0]);
2338                         } else {
2339                                 con_log(CL_ANN, (KERN_WARNING
2340                                                  "megaraid mailbox: invalid sg:%d\n",
2341                                                  __LINE__));
2342                                 c = 0;
2343                         }
2344
2345                         if ((c & 0x1F ) == TYPE_DISK) {
2346                                 pdev_index = (scb->dev_channel * 16) +
2347                                         scb->dev_target;
2348                                 pdev_state =
2349                                         raid_dev->pdrv_state[pdev_index] & 0x0F;
2350
2351                                 if (pdev_state == PDRV_ONLINE           ||
2352                                         pdev_state == PDRV_FAILED       ||
2353                                         pdev_state == PDRV_RBLD         ||
2354                                         pdev_state == PDRV_HOTSPARE     ||
2355                                         megaraid_expose_unconf_disks == 0) {
2356
2357                                         status = 0xF0;
2358                                 }
2359                         }
2360                 }
2361
2362                 // Convert MegaRAID status to Linux error code
2363                 switch (status) {
2364
2365                 case 0x00:
2366
2367                         scp->result = (DID_OK << 16);
2368                         break;
2369
2370                 case 0x02:
2371
2372                         /* set sense_buffer and result fields */
2373                         if (mbox->cmd == MBOXCMD_PASSTHRU ||
2374                                 mbox->cmd == MBOXCMD_PASSTHRU64) {
2375
2376                                 memcpy(scp->sense_buffer, pthru->reqsensearea,
2377                                                 14);
2378
2379                                 scp->result = DRIVER_SENSE << 24 |
2380                                         DID_OK << 16 | CHECK_CONDITION << 1;
2381                         }
2382                         else {
2383                                 if (mbox->cmd == MBOXCMD_EXTPTHRU) {
2384
2385                                         memcpy(scp->sense_buffer,
2386                                                 epthru->reqsensearea, 14);
2387
2388                                         scp->result = DRIVER_SENSE << 24 |
2389                                                 DID_OK << 16 |
2390                                                 CHECK_CONDITION << 1;
2391                                 } else {
2392                                         scp->sense_buffer[0] = 0x70;
2393                                         scp->sense_buffer[2] = ABORTED_COMMAND;
2394                                         scp->result = CHECK_CONDITION << 1;
2395                                 }
2396                         }
2397                         break;
2398
2399                 case 0x08:
2400
2401                         scp->result = DID_BUS_BUSY << 16 | status;
2402                         break;
2403
2404                 default:
2405
2406                         /*
2407                          * If TEST_UNIT_READY fails, we know RESERVATION_STATUS
2408                          * failed
2409                          */
2410                         if (scp->cmnd[0] == TEST_UNIT_READY) {
2411                                 scp->result = DID_ERROR << 16 |
2412                                         RESERVATION_CONFLICT << 1;
2413                         }
2414                         else
2415                         /*
2416                          * Error code returned is 1 if Reserve or Release
2417                          * failed or the input parameter is invalid
2418                          */
2419                         if (status == 1 && (scp->cmnd[0] == RESERVE ||
2420                                          scp->cmnd[0] == RELEASE)) {
2421
2422                                 scp->result = DID_ERROR << 16 |
2423                                         RESERVATION_CONFLICT << 1;
2424                         }
2425                         else {
2426                                 scp->result = DID_BAD_TARGET << 16 | status;
2427                         }
2428                 }
2429
2430                 // print a debug message for all failed commands
2431                 if (status) {
2432                         megaraid_mbox_display_scb(adapter, scb);
2433                 }
2434
2435                 // Free our internal resources and call the mid-layer callback
2436                 // routine
2437                 megaraid_mbox_sync_scb(adapter, scb);
2438
2439                 // remove from local clist
2440                 list_del_init(&scb->list);
2441
2442                 // put back in free list
2443                 megaraid_dealloc_scb(adapter, scb);
2444
2445                 // send the scsi packet back to kernel
2446                 scp->scsi_done(scp);
2447         }
2448
2449         return;
2450 }
2451
2452
2453 /**
2454  * megaraid_abort_handler - abort the scsi command
2455  * @scp         : command to be aborted
2456  *
2457  * Abort a previous SCSI request. Only commands on the pending list can be
2458  * aborted. All the commands issued to the F/W must complete.
2459  **/
2460 static int
2461 megaraid_abort_handler(struct scsi_cmnd *scp)
2462 {
2463         adapter_t               *adapter;
2464         mraid_device_t          *raid_dev;
2465         scb_t                   *scb;
2466         scb_t                   *tmp;
2467         int                     found;
2468         unsigned long           flags;
2469         int                     i;
2470
2471
2472         adapter         = SCP2ADAPTER(scp);
2473         raid_dev        = ADAP2RAIDDEV(adapter);
2474
2475         con_log(CL_ANN, (KERN_WARNING
2476                 "megaraid: aborting cmd=%x <c=%d t=%d l=%d>\n",
2477                 scp->cmnd[0], SCP2CHANNEL(scp),
2478                 SCP2TARGET(scp), SCP2LUN(scp)));
2479
2480         // If FW has stopped responding, simply return failure
2481         if (raid_dev->hw_error) {
2482                 con_log(CL_ANN, (KERN_NOTICE
2483                         "megaraid: hw error, not aborting\n"));
2484                 return FAILED;
2485         }
2486
2487         // There might a race here, where the command was completed by the
2488         // firmware and now it is on the completed list. Before we could
2489         // complete the command to the kernel in dpc, the abort came.
2490         // Find out if this is the case to avoid the race.
2491         scb = NULL;
2492         spin_lock_irqsave(COMPLETED_LIST_LOCK(adapter), flags);
2493         list_for_each_entry_safe(scb, tmp, &adapter->completed_list, list) {
2494
2495                 if (scb->scp == scp) {  // Found command
2496
2497                         list_del_init(&scb->list);      // from completed list
2498
2499                         con_log(CL_ANN, (KERN_WARNING
2500                         "megaraid: %d[%d:%d], abort from completed list\n",
2501                                 scb->sno, scb->dev_channel, scb->dev_target));
2502
2503                         scp->result = (DID_ABORT << 16);
2504                         scp->scsi_done(scp);
2505
2506                         megaraid_dealloc_scb(adapter, scb);
2507
2508                         spin_unlock_irqrestore(COMPLETED_LIST_LOCK(adapter),
2509                                 flags);
2510
2511                         return SUCCESS;
2512                 }
2513         }
2514         spin_unlock_irqrestore(COMPLETED_LIST_LOCK(adapter), flags);
2515
2516
2517         // Find out if this command is still on the pending list. If it is and
2518         // was never issued, abort and return success. If the command is owned
2519         // by the firmware, we must wait for it to complete by the FW.
2520         spin_lock_irqsave(PENDING_LIST_LOCK(adapter), flags);
2521         list_for_each_entry_safe(scb, tmp, &adapter->pend_list, list) {
2522
2523                 if (scb->scp == scp) {  // Found command
2524
2525                         list_del_init(&scb->list);      // from pending list
2526
2527                         ASSERT(!(scb->state & SCB_ISSUED));
2528
2529                         con_log(CL_ANN, (KERN_WARNING
2530                                 "megaraid abort: [%d:%d], driver owner\n",
2531                                 scb->dev_channel, scb->dev_target));
2532
2533                         scp->result = (DID_ABORT << 16);
2534                         scp->scsi_done(scp);
2535
2536                         megaraid_dealloc_scb(adapter, scb);
2537
2538                         spin_unlock_irqrestore(PENDING_LIST_LOCK(adapter),
2539                                 flags);
2540
2541                         return SUCCESS;
2542                 }
2543         }
2544         spin_unlock_irqrestore(PENDING_LIST_LOCK(adapter), flags);
2545
2546
2547         // Check do we even own this command, in which case this would be
2548         // owned by the firmware. The only way to locate the FW scb is to
2549         // traverse through the list of all SCB, since driver does not
2550         // maintain these SCBs on any list
2551         found = 0;
2552         spin_lock_irq(&adapter->lock);
2553         for (i = 0; i < MBOX_MAX_SCSI_CMDS; i++) {
2554                 scb = adapter->kscb_list + i;
2555
2556                 if (scb->scp == scp) {
2557
2558                         found = 1;
2559
2560                         if (!(scb->state & SCB_ISSUED)) {
2561                                 con_log(CL_ANN, (KERN_WARNING
2562                                 "megaraid abort: %d[%d:%d], invalid state\n",
2563                                 scb->sno, scb->dev_channel, scb->dev_target));
2564                                 BUG();
2565                         }
2566                         else {
2567                                 con_log(CL_ANN, (KERN_WARNING
2568                                 "megaraid abort: %d[%d:%d], fw owner\n",
2569                                 scb->sno, scb->dev_channel, scb->dev_target));
2570                         }
2571                 }
2572         }
2573         spin_unlock_irq(&adapter->lock);
2574
2575         if (!found) {
2576                 con_log(CL_ANN, (KERN_WARNING "megaraid abort: do now own\n"));
2577
2578                 // FIXME: Should there be a callback for this command?
2579                 return SUCCESS;
2580         }
2581
2582         // We cannot actually abort a command owned by firmware, return
2583         // failure and wait for reset. In host reset handler, we will find out
2584         // if the HBA is still live
2585         return FAILED;
2586 }
2587
2588 /**
2589  * megaraid_reset_handler - device reset hadler for mailbox based driver
2590  * @scp         : reference command
2591  *
2592  * Reset handler for the mailbox based controller. First try to find out if
2593  * the FW is still live, in which case the outstanding commands counter mut go
2594  * down to 0. If that happens, also issue the reservation reset command to
2595  * relinquish (possible) reservations on the logical drives connected to this
2596  * host.
2597  **/
2598 static int
2599 megaraid_reset_handler(struct scsi_cmnd *scp)
2600 {
2601         adapter_t       *adapter;
2602         scb_t           *scb;
2603         scb_t           *tmp;
2604         mraid_device_t  *raid_dev;
2605         unsigned long   flags;
2606         uint8_t         raw_mbox[sizeof(mbox_t)];
2607         int             rval;
2608         int             recovery_window;
2609         int             recovering;
2610         int             i;
2611         uioc_t          *kioc;
2612
2613         adapter         = SCP2ADAPTER(scp);
2614         raid_dev        = ADAP2RAIDDEV(adapter);
2615
2616         // return failure if adapter is not responding
2617         if (raid_dev->hw_error) {
2618                 con_log(CL_ANN, (KERN_NOTICE
2619                         "megaraid: hw error, cannot reset\n"));
2620                 return FAILED;
2621         }
2622
2623
2624         // Under exceptional conditions, FW can take up to 3 minutes to
2625         // complete command processing. Wait for additional 2 minutes for the
2626         // pending commands counter to go down to 0. If it doesn't, let the
2627         // controller be marked offline
2628         // Also, reset all the commands currently owned by the driver
2629         spin_lock_irqsave(PENDING_LIST_LOCK(adapter), flags);
2630         list_for_each_entry_safe(scb, tmp, &adapter->pend_list, list) {
2631                 list_del_init(&scb->list);      // from pending list
2632
2633                 if (scb->sno >= MBOX_MAX_SCSI_CMDS) {
2634                         con_log(CL_ANN, (KERN_WARNING
2635                         "megaraid: IOCTL packet with %d[%d:%d] being reset\n",
2636                         scb->sno, scb->dev_channel, scb->dev_target));
2637
2638                         scb->status = -1;
2639
2640                         kioc                    = (uioc_t *)scb->gp;
2641                         kioc->status            = -EFAULT;
2642
2643                         megaraid_mbox_mm_done(adapter, scb);
2644                 } else {
2645                         if (scb->scp == scp) {  // Found command
2646                                 con_log(CL_ANN, (KERN_WARNING
2647                                         "megaraid: %d[%d:%d], reset from pending list\n",
2648                                         scb->sno, scb->dev_channel, scb->dev_target));
2649                         } else {
2650                                 con_log(CL_ANN, (KERN_WARNING
2651                                 "megaraid: IO packet with %d[%d:%d] being reset\n",
2652                                 scb->sno, scb->dev_channel, scb->dev_target));
2653                         }
2654
2655                         scb->scp->result = (DID_RESET << 16);
2656                         scb->scp->scsi_done(scb->scp);
2657
2658                         megaraid_dealloc_scb(adapter, scb);
2659                 }
2660         }
2661         spin_unlock_irqrestore(PENDING_LIST_LOCK(adapter), flags);
2662
2663         if (adapter->outstanding_cmds) {
2664                 con_log(CL_ANN, (KERN_NOTICE
2665                         "megaraid: %d outstanding commands. Max wait %d sec\n",
2666                         adapter->outstanding_cmds,
2667                         (MBOX_RESET_WAIT + MBOX_RESET_EXT_WAIT)));
2668         }
2669
2670         recovery_window = MBOX_RESET_WAIT + MBOX_RESET_EXT_WAIT;
2671
2672         recovering = adapter->outstanding_cmds;
2673
2674         for (i = 0; i < recovery_window; i++) {
2675
2676                 megaraid_ack_sequence(adapter);
2677
2678                 // print a message once every 5 seconds only
2679                 if (!(i % 5)) {
2680                         con_log(CL_ANN, (
2681                         "megaraid mbox: Wait for %d commands to complete:%d\n",
2682                                 adapter->outstanding_cmds,
2683                                 (MBOX_RESET_WAIT + MBOX_RESET_EXT_WAIT) - i));
2684                 }
2685
2686                 // bailout if no recovery happened in reset time
2687                 if (adapter->outstanding_cmds == 0) {
2688                         break;
2689                 }
2690
2691                 msleep(1000);
2692         }
2693
2694         spin_lock(&adapter->lock);
2695
2696         // If still outstanding commands, bail out
2697         if (adapter->outstanding_cmds) {
2698                 con_log(CL_ANN, (KERN_WARNING
2699                         "megaraid mbox: critical hardware error!\n"));
2700
2701                 raid_dev->hw_error = 1;
2702
2703                 rval = FAILED;
2704                 goto out;
2705         }
2706         else {
2707                 con_log(CL_ANN, (KERN_NOTICE
2708                 "megaraid mbox: reset sequence completed successfully\n"));
2709         }
2710
2711
2712         // If the controller supports clustering, reset reservations
2713         if (!adapter->ha) {
2714                 rval = SUCCESS;
2715                 goto out;
2716         }
2717
2718         // clear reservations if any
2719         raw_mbox[0] = CLUSTER_CMD;
2720         raw_mbox[2] = RESET_RESERVATIONS;
2721
2722         rval = SUCCESS;
2723         if (mbox_post_sync_cmd_fast(adapter, raw_mbox) == 0) {
2724                 con_log(CL_ANN,
2725                         (KERN_INFO "megaraid: reservation reset\n"));
2726         }
2727         else {
2728                 rval = FAILED;
2729                 con_log(CL_ANN, (KERN_WARNING
2730                                 "megaraid: reservation reset failed\n"));
2731         }
2732
2733  out:
2734         spin_unlock(&adapter->lock);
2735         return rval;
2736 }
2737
2738 /*
2739  * START: internal commands library
2740  *
2741  * This section of the driver has the common routine used by the driver and
2742  * also has all the FW routines
2743  */
2744
2745 /**
2746  * mbox_post_sync_cmd() - blocking command to the mailbox based controllers
2747  * @adapter     : controller's soft state
2748  * @raw_mbox    : the mailbox
2749  *
2750  * Issue a scb in synchronous and non-interrupt mode for mailbox based
2751  * controllers.
2752  */
2753 static int
2754 mbox_post_sync_cmd(adapter_t *adapter, uint8_t raw_mbox[])
2755 {
2756         mraid_device_t  *raid_dev = ADAP2RAIDDEV(adapter);
2757         mbox64_t        *mbox64;
2758         mbox_t          *mbox;
2759         uint8_t         status;
2760         int             i;
2761
2762
2763         mbox64  = raid_dev->mbox64;
2764         mbox    = raid_dev->mbox;
2765
2766         /*
2767          * Wait until mailbox is free
2768          */
2769         if (megaraid_busywait_mbox(raid_dev) != 0)
2770                 goto blocked_mailbox;
2771
2772         /*
2773          * Copy mailbox data into host structure
2774          */
2775         memcpy((caddr_t)mbox, (caddr_t)raw_mbox, 16);
2776         mbox->cmdid             = 0xFE;
2777         mbox->busy              = 1;
2778         mbox->poll              = 0;
2779         mbox->ack               = 0;
2780         mbox->numstatus         = 0xFF;
2781         mbox->status            = 0xFF;
2782
2783         wmb();
2784         WRINDOOR(raid_dev, raid_dev->mbox_dma | 0x1);
2785
2786         // wait for maximum 1 second for status to post. If the status is not
2787         // available within 1 second, assume FW is initializing and wait
2788         // for an extended amount of time
2789         if (mbox->numstatus == 0xFF) {  // status not yet available
2790                 udelay(25);
2791
2792                 for (i = 0; mbox->numstatus == 0xFF && i < 1000; i++) {
2793                         rmb();
2794                         msleep(1);
2795                 }
2796
2797
2798                 if (i == 1000) {
2799                         con_log(CL_ANN, (KERN_NOTICE
2800                                 "megaraid mailbox: wait for FW to boot      "));
2801
2802                         for (i = 0; (mbox->numstatus == 0xFF) &&
2803                                         (i < MBOX_RESET_WAIT); i++) {
2804                                 rmb();
2805                                 con_log(CL_ANN, ("\b\b\b\b\b[%03d]",
2806                                                         MBOX_RESET_WAIT - i));
2807                                 msleep(1000);
2808                         }
2809
2810                         if (i == MBOX_RESET_WAIT) {
2811
2812                                 con_log(CL_ANN, (
2813                                 "\nmegaraid mailbox: status not available\n"));
2814
2815                                 return -1;
2816                         }
2817                         con_log(CL_ANN, ("\b\b\b\b\b[ok] \n"));
2818                 }
2819         }
2820
2821         // wait for maximum 1 second for poll semaphore
2822         if (mbox->poll != 0x77) {
2823                 udelay(25);
2824
2825                 for (i = 0; (mbox->poll != 0x77) && (i < 1000); i++) {
2826                         rmb();
2827                         msleep(1);
2828                 }
2829
2830                 if (i == 1000) {
2831                         con_log(CL_ANN, (KERN_WARNING
2832                         "megaraid mailbox: could not get poll semaphore\n"));
2833                         return -1;
2834                 }
2835         }
2836
2837         WRINDOOR(raid_dev, raid_dev->mbox_dma | 0x2);
2838         wmb();
2839
2840         // wait for maximum 1 second for acknowledgement
2841         if (RDINDOOR(raid_dev) & 0x2) {
2842                 udelay(25);
2843
2844                 for (i = 0; (RDINDOOR(raid_dev) & 0x2) && (i < 1000); i++) {
2845                         rmb();
2846                         msleep(1);
2847                 }
2848
2849                 if (i == 1000) {
2850                         con_log(CL_ANN, (KERN_WARNING
2851                                 "megaraid mailbox: could not acknowledge\n"));
2852                         return -1;
2853                 }
2854         }
2855         mbox->poll      = 0;
2856         mbox->ack       = 0x77;
2857
2858         status = mbox->status;
2859
2860         // invalidate the completed command id array. After command
2861         // completion, firmware would write the valid id.
2862         mbox->numstatus = 0xFF;
2863         mbox->status    = 0xFF;
2864         for (i = 0; i < MBOX_MAX_FIRMWARE_STATUS; i++) {
2865                 mbox->completed[i] = 0xFF;
2866         }
2867
2868         return status;
2869
2870 blocked_mailbox:
2871
2872         con_log(CL_ANN, (KERN_WARNING "megaraid: blocked mailbox\n") );
2873         return -1;
2874 }
2875
2876
2877 /**
2878  * mbox_post_sync_cmd_fast - blocking command to the mailbox based controllers
2879  * @adapter     : controller's soft state
2880  * @raw_mbox    : the mailbox
2881  *
2882  * Issue a scb in synchronous and non-interrupt mode for mailbox based
2883  * controllers. This is a faster version of the synchronous command and
2884  * therefore can be called in interrupt-context as well.
2885  */
2886 static int
2887 mbox_post_sync_cmd_fast(adapter_t *adapter, uint8_t raw_mbox[])
2888 {
2889         mraid_device_t  *raid_dev = ADAP2RAIDDEV(adapter);
2890         mbox_t          *mbox;
2891         long            i;
2892
2893
2894         mbox    = raid_dev->mbox;
2895
2896         // return immediately if the mailbox is busy
2897         if (mbox->busy) return -1;
2898
2899         // Copy mailbox data into host structure
2900         memcpy((caddr_t)mbox, (caddr_t)raw_mbox, 14);
2901         mbox->cmdid             = 0xFE;
2902         mbox->busy              = 1;
2903         mbox->poll              = 0;
2904         mbox->ack               = 0;
2905         mbox->numstatus         = 0xFF;
2906         mbox->status            = 0xFF;
2907
2908         wmb();
2909         WRINDOOR(raid_dev, raid_dev->mbox_dma | 0x1);
2910
2911         for (i = 0; i < MBOX_SYNC_WAIT_CNT; i++) {
2912                 if (mbox->numstatus != 0xFF) break;
2913                 rmb();
2914                 udelay(MBOX_SYNC_DELAY_200);
2915         }
2916
2917         if (i == MBOX_SYNC_WAIT_CNT) {
2918                 // We may need to re-calibrate the counter
2919                 con_log(CL_ANN, (KERN_CRIT
2920                         "megaraid: fast sync command timed out\n"));
2921         }
2922
2923         WRINDOOR(raid_dev, raid_dev->mbox_dma | 0x2);
2924         wmb();
2925
2926         return mbox->status;
2927 }
2928
2929
2930 /**
2931  * megaraid_busywait_mbox() - Wait until the controller's mailbox is available
2932  * @raid_dev    : RAID device (HBA) soft state
2933  *
2934  * Wait until the controller's mailbox is available to accept more commands.
2935  * Wait for at most 1 second.
2936  */
2937 static int
2938 megaraid_busywait_mbox(mraid_device_t *raid_dev)
2939 {
2940         mbox_t  *mbox = raid_dev->mbox;
2941         int     i = 0;
2942
2943         if (mbox->busy) {
2944                 udelay(25);
2945                 for (i = 0; mbox->busy && i < 1000; i++)
2946                         msleep(1);
2947         }
2948
2949         if (i < 1000) return 0;
2950         else return -1;
2951 }
2952
2953
2954 /**
2955  * megaraid_mbox_product_info - some static information about the controller
2956  * @adapter     : our soft state
2957  *
2958  * Issue commands to the controller to grab some parameters required by our
2959  * caller.
2960  */
2961 static int
2962 megaraid_mbox_product_info(adapter_t *adapter)
2963 {
2964         mraid_device_t          *raid_dev = ADAP2RAIDDEV(adapter);
2965         mbox_t                  *mbox;
2966         uint8_t                 raw_mbox[sizeof(mbox_t)];
2967         mraid_pinfo_t           *pinfo;
2968         dma_addr_t              pinfo_dma_h;
2969         mraid_inquiry3_t        *mraid_inq3;
2970         int                     i;
2971
2972
2973         memset((caddr_t)raw_mbox, 0, sizeof(raw_mbox));
2974         mbox = (mbox_t *)raw_mbox;
2975
2976         /*
2977          * Issue an ENQUIRY3 command to find out certain adapter parameters,
2978          * e.g., max channels, max commands etc.
2979          */
2980         pinfo = pci_alloc_consistent(adapter->pdev, sizeof(mraid_pinfo_t),
2981                         &pinfo_dma_h);
2982
2983         if (pinfo == NULL) {
2984                 con_log(CL_ANN, (KERN_WARNING
2985                         "megaraid: out of memory, %s %d\n", __func__,
2986                         __LINE__));
2987
2988                 return -1;
2989         }
2990         memset(pinfo, 0, sizeof(mraid_pinfo_t));
2991
2992         mbox->xferaddr = (uint32_t)adapter->ibuf_dma_h;
2993         memset((void *)adapter->ibuf, 0, MBOX_IBUF_SIZE);
2994
2995         raw_mbox[0] = FC_NEW_CONFIG;
2996         raw_mbox[2] = NC_SUBOP_ENQUIRY3;
2997         raw_mbox[3] = ENQ3_GET_SOLICITED_FULL;
2998
2999         // Issue the command
3000         if (mbox_post_sync_cmd(adapter, raw_mbox) != 0) {
3001
3002                 con_log(CL_ANN, (KERN_WARNING "megaraid: Inquiry3 failed\n"));
3003
3004                 pci_free_consistent(adapter->pdev, sizeof(mraid_pinfo_t),
3005                         pinfo, pinfo_dma_h);
3006
3007                 return -1;
3008         }
3009
3010         /*
3011          * Collect information about state of each physical drive
3012          * attached to the controller. We will expose all the disks
3013          * which are not part of RAID
3014          */
3015         mraid_inq3 = (mraid_inquiry3_t *)adapter->ibuf;
3016         for (i = 0; i < MBOX_MAX_PHYSICAL_DRIVES; i++) {
3017                 raid_dev->pdrv_state[i] = mraid_inq3->pdrv_state[i];
3018         }
3019
3020         /*
3021          * Get product info for information like number of channels,
3022          * maximum commands supported.
3023          */
3024         memset((caddr_t)raw_mbox, 0, sizeof(raw_mbox));
3025         mbox->xferaddr = (uint32_t)pinfo_dma_h;
3026
3027         raw_mbox[0] = FC_NEW_CONFIG;
3028         raw_mbox[2] = NC_SUBOP_PRODUCT_INFO;
3029
3030         if (mbox_post_sync_cmd(adapter, raw_mbox) != 0) {
3031
3032                 con_log(CL_ANN, (KERN_WARNING
3033                         "megaraid: product info failed\n"));
3034
3035                 pci_free_consistent(adapter->pdev, sizeof(mraid_pinfo_t),
3036                         pinfo, pinfo_dma_h);
3037
3038                 return -1;
3039         }
3040
3041         /*
3042          * Setup some parameters for host, as required by our caller
3043          */
3044         adapter->max_channel = pinfo->nchannels;
3045
3046         /*
3047          * we will export all the logical drives on a single channel.
3048          * Add 1 since inquires do not come for inititor ID
3049          */
3050         adapter->max_target     = MAX_LOGICAL_DRIVES_40LD + 1;
3051         adapter->max_lun        = 8;    // up to 8 LUNs for non-disk devices
3052
3053         /*
3054          * These are the maximum outstanding commands for the scsi-layer
3055          */
3056         adapter->max_cmds       = MBOX_MAX_SCSI_CMDS;
3057
3058         memset(adapter->fw_version, 0, VERSION_SIZE);
3059         memset(adapter->bios_version, 0, VERSION_SIZE);
3060
3061         memcpy(adapter->fw_version, pinfo->fw_version, 4);
3062         adapter->fw_version[4] = 0;
3063
3064         memcpy(adapter->bios_version, pinfo->bios_version, 4);
3065         adapter->bios_version[4] = 0;
3066
3067         con_log(CL_ANN, (KERN_NOTICE
3068                 "megaraid: fw version:[%s] bios version:[%s]\n",
3069                 adapter->fw_version, adapter->bios_version));
3070
3071         pci_free_consistent(adapter->pdev, sizeof(mraid_pinfo_t), pinfo,
3072                         pinfo_dma_h);
3073
3074         return 0;
3075 }
3076
3077
3078
3079 /**
3080  * megaraid_mbox_extended_cdb - check for support for extended CDBs
3081  * @adapter     : soft state for the controller
3082  *
3083  * This routine check whether the controller in question supports extended
3084  * ( > 10 bytes ) CDBs.
3085  */
3086 static int
3087 megaraid_mbox_extended_cdb(adapter_t *adapter)
3088 {
3089         mbox_t          *mbox;
3090         uint8_t         raw_mbox[sizeof(mbox_t)];
3091         int             rval;
3092
3093         mbox = (mbox_t *)raw_mbox;
3094
3095         memset((caddr_t)raw_mbox, 0, sizeof(raw_mbox));
3096         mbox->xferaddr  = (uint32_t)adapter->ibuf_dma_h;
3097
3098         memset((void *)adapter->ibuf, 0, MBOX_IBUF_SIZE);
3099
3100         raw_mbox[0] = MAIN_MISC_OPCODE;
3101         raw_mbox[2] = SUPPORT_EXT_CDB;
3102
3103         /*
3104          * Issue the command
3105          */
3106         rval = 0;
3107         if (mbox_post_sync_cmd(adapter, raw_mbox) != 0) {
3108                 rval = -1;
3109         }
3110
3111         return rval;
3112 }
3113
3114
3115 /**
3116  * megaraid_mbox_support_ha - Do we support clustering
3117  * @adapter     : soft state for the controller
3118  * @init_id     : ID of the initiator
3119  *
3120  * Determine if the firmware supports clustering and the ID of the initiator.
3121  */
3122 static int
3123 megaraid_mbox_support_ha(adapter_t *adapter, uint16_t *init_id)
3124 {
3125         mbox_t          *mbox;
3126         uint8_t         raw_mbox[sizeof(mbox_t)];
3127         int             rval;
3128
3129
3130         mbox = (mbox_t *)raw_mbox;
3131
3132         memset((caddr_t)raw_mbox, 0, sizeof(raw_mbox));
3133
3134         mbox->xferaddr = (uint32_t)adapter->ibuf_dma_h;
3135
3136         memset((void *)adapter->ibuf, 0, MBOX_IBUF_SIZE);
3137
3138         raw_mbox[0] = GET_TARGET_ID;
3139
3140         // Issue the command
3141         *init_id = 7;
3142         rval =  -1;
3143         if (mbox_post_sync_cmd(adapter, raw_mbox) == 0) {
3144
3145                 *init_id = *(uint8_t *)adapter->ibuf;
3146
3147                 con_log(CL_ANN, (KERN_INFO
3148                         "megaraid: cluster firmware, initiator ID: %d\n",
3149                         *init_id));
3150
3151                 rval =  0;
3152         }
3153
3154         return rval;
3155 }
3156
3157
3158 /**
3159  * megaraid_mbox_support_random_del - Do we support random deletion
3160  * @adapter     : soft state for the controller
3161  *
3162  * Determine if the firmware supports random deletion.
3163  * Return:      1 is operation supported, 0 otherwise
3164  */
3165 static int
3166 megaraid_mbox_support_random_del(adapter_t *adapter)
3167 {
3168         mbox_t          *mbox;
3169         uint8_t         raw_mbox[sizeof(mbox_t)];
3170         int             rval;
3171
3172         /*
3173          * Newer firmware on Dell CERC expect a different
3174          * random deletion handling, so disable it.
3175          */
3176         if (adapter->pdev->vendor == PCI_VENDOR_ID_AMI &&
3177             adapter->pdev->device == PCI_DEVICE_ID_AMI_MEGARAID3 &&
3178             adapter->pdev->subsystem_vendor == PCI_VENDOR_ID_DELL &&
3179             adapter->pdev->subsystem_device == PCI_SUBSYS_ID_CERC_ATA100_4CH &&
3180             (adapter->fw_version[0] > '6' ||
3181              (adapter->fw_version[0] == '6' &&
3182               adapter->fw_version[2] > '6') ||
3183              (adapter->fw_version[0] == '6'
3184               && adapter->fw_version[2] == '6'
3185               && adapter->fw_version[3] > '1'))) {
3186                 con_log(CL_DLEVEL1, ("megaraid: disable random deletion\n"));
3187                 return 0;
3188         }
3189
3190         mbox = (mbox_t *)raw_mbox;
3191
3192         memset((caddr_t)raw_mbox, 0, sizeof(mbox_t));
3193
3194         raw_mbox[0] = FC_DEL_LOGDRV;
3195         raw_mbox[2] = OP_SUP_DEL_LOGDRV;
3196
3197         // Issue the command
3198         rval = 0;
3199         if (mbox_post_sync_cmd(adapter, raw_mbox) == 0) {
3200
3201                 con_log(CL_DLEVEL1, ("megaraid: supports random deletion\n"));
3202
3203                 rval =  1;
3204         }
3205
3206         return rval;
3207 }
3208
3209
3210 /**
3211  * megaraid_mbox_get_max_sg - maximum sg elements supported by the firmware
3212  * @adapter     : soft state for the controller
3213  *
3214  * Find out the maximum number of scatter-gather elements supported by the
3215  * firmware.
3216  */
3217 static int
3218 megaraid_mbox_get_max_sg(adapter_t *adapter)
3219 {
3220         mbox_t          *mbox;
3221         uint8_t         raw_mbox[sizeof(mbox_t)];
3222         int             nsg;
3223
3224
3225         mbox = (mbox_t *)raw_mbox;
3226
3227         memset((caddr_t)raw_mbox, 0, sizeof(mbox_t));
3228
3229         mbox->xferaddr = (uint32_t)adapter->ibuf_dma_h;
3230
3231         memset((void *)adapter->ibuf, 0, MBOX_IBUF_SIZE);
3232
3233         raw_mbox[0] = MAIN_MISC_OPCODE;
3234         raw_mbox[2] = GET_MAX_SG_SUPPORT;
3235
3236         // Issue the command
3237         if (mbox_post_sync_cmd(adapter, raw_mbox) == 0) {
3238                 nsg =  *(uint8_t *)adapter->ibuf;
3239         }
3240         else {
3241                 nsg =  MBOX_DEFAULT_SG_SIZE;
3242         }
3243
3244         if (nsg > MBOX_MAX_SG_SIZE) nsg = MBOX_MAX_SG_SIZE;
3245
3246         return nsg;
3247 }
3248
3249
3250 /**
3251  * megaraid_mbox_enum_raid_scsi - enumerate the RAID and SCSI channels
3252  * @adapter     : soft state for the controller
3253  *
3254  * Enumerate the RAID and SCSI channels for ROMB platforms so that channels
3255  * can be exported as regular SCSI channels.
3256  */
3257 static void
3258 megaraid_mbox_enum_raid_scsi(adapter_t *adapter)
3259 {
3260         mraid_device_t  *raid_dev = ADAP2RAIDDEV(adapter);
3261         mbox_t          *mbox;
3262         uint8_t         raw_mbox[sizeof(mbox_t)];
3263
3264
3265         mbox = (mbox_t *)raw_mbox;
3266
3267         memset((caddr_t)raw_mbox, 0, sizeof(mbox_t));
3268
3269         mbox->xferaddr = (uint32_t)adapter->ibuf_dma_h;
3270
3271         memset((void *)adapter->ibuf, 0, MBOX_IBUF_SIZE);
3272
3273         raw_mbox[0] = CHNL_CLASS;
3274         raw_mbox[2] = GET_CHNL_CLASS;
3275
3276         // Issue the command. If the command fails, all channels are RAID
3277         // channels
3278         raid_dev->channel_class = 0xFF;
3279         if (mbox_post_sync_cmd(adapter, raw_mbox) == 0) {
3280                 raid_dev->channel_class =  *(uint8_t *)adapter->ibuf;
3281         }
3282
3283         return;
3284 }
3285
3286
3287 /**
3288  * megaraid_mbox_flush_cache - flush adapter and disks cache
3289  * @adapter             : soft state for the controller
3290  *
3291  * Flush adapter cache followed by disks cache.
3292  */
3293 static void
3294 megaraid_mbox_flush_cache(adapter_t *adapter)
3295 {
3296         mbox_t  *mbox;
3297         uint8_t raw_mbox[sizeof(mbox_t)];
3298
3299
3300         mbox = (mbox_t *)raw_mbox;
3301
3302         memset((caddr_t)raw_mbox, 0, sizeof(mbox_t));
3303
3304         raw_mbox[0] = FLUSH_ADAPTER;
3305
3306         if (mbox_post_sync_cmd(adapter, raw_mbox) != 0) {
3307                 con_log(CL_ANN, ("megaraid: flush adapter failed\n"));
3308         }
3309
3310         raw_mbox[0] = FLUSH_SYSTEM;
3311
3312         if (mbox_post_sync_cmd(adapter, raw_mbox) != 0) {
3313                 con_log(CL_ANN, ("megaraid: flush disks cache failed\n"));
3314         }
3315
3316         return;
3317 }
3318
3319
3320 /**
3321  * megaraid_mbox_fire_sync_cmd - fire the sync cmd
3322  * @adapter             : soft state for the controller
3323  *
3324  * Clears the pending cmds in FW and reinits its RAID structs.
3325  */
3326 static int
3327 megaraid_mbox_fire_sync_cmd(adapter_t *adapter)
3328 {
3329         mbox_t  *mbox;
3330         uint8_t raw_mbox[sizeof(mbox_t)];
3331         mraid_device_t  *raid_dev = ADAP2RAIDDEV(adapter);
3332         mbox64_t *mbox64;
3333         int     status = 0;
3334         int i;
3335         uint32_t dword;
3336
3337         mbox = (mbox_t *)raw_mbox;
3338
3339         memset((caddr_t)raw_mbox, 0, sizeof(mbox_t));
3340
3341         raw_mbox[0] = 0xFF;
3342
3343         mbox64  = raid_dev->mbox64;
3344         mbox    = raid_dev->mbox;
3345
3346         /* Wait until mailbox is free */
3347         if (megaraid_busywait_mbox(raid_dev) != 0) {
3348                 status = 1;
3349                 goto blocked_mailbox;
3350         }
3351
3352         /* Copy mailbox data into host structure */
3353         memcpy((caddr_t)mbox, (caddr_t)raw_mbox, 16);
3354         mbox->cmdid             = 0xFE;
3355         mbox->busy              = 1;
3356         mbox->poll              = 0;
3357         mbox->ack               = 0;
3358         mbox->numstatus         = 0;
3359         mbox->status            = 0;
3360
3361         wmb();
3362         WRINDOOR(raid_dev, raid_dev->mbox_dma | 0x1);
3363
3364         /* Wait for maximum 1 min for status to post.
3365          * If the Firmware SUPPORTS the ABOVE COMMAND,
3366          * mbox->cmd will be set to 0
3367          * else
3368          * the firmware will reject the command with
3369          * mbox->numstatus set to 1
3370          */
3371
3372         i = 0;
3373         status = 0;
3374         while (!mbox->numstatus && mbox->cmd == 0xFF) {
3375                 rmb();
3376                 msleep(1);
3377                 i++;
3378                 if (i > 1000 * 60) {
3379                         status = 1;
3380                         break;
3381                 }
3382         }
3383         if (mbox->numstatus == 1)
3384                 status = 1; /*cmd not supported*/
3385
3386         /* Check for interrupt line */
3387         dword = RDOUTDOOR(raid_dev);
3388         WROUTDOOR(raid_dev, dword);
3389         WRINDOOR(raid_dev,2);
3390
3391         return status;
3392
3393 blocked_mailbox:
3394         con_log(CL_ANN, (KERN_WARNING "megaraid: blocked mailbox\n"));
3395         return status;
3396 }
3397
3398 /**
3399  * megaraid_mbox_display_scb - display SCB information, mostly debug purposes
3400  * @adapter             : controller's soft state
3401  * @scb                 : SCB to be displayed
3402  * @level               : debug level for console print
3403  *
3404  * Diplay information about the given SCB iff the current debug level is
3405  * verbose.
3406  */
3407 static void
3408 megaraid_mbox_display_scb(adapter_t *adapter, scb_t *scb)
3409 {
3410         mbox_ccb_t              *ccb;
3411         struct scsi_cmnd        *scp;
3412         mbox_t                  *mbox;
3413         int                     level;
3414         int                     i;
3415
3416
3417         ccb     = (mbox_ccb_t *)scb->ccb;
3418         scp     = scb->scp;
3419         mbox    = ccb->mbox;
3420
3421         level = CL_DLEVEL3;
3422
3423         con_log(level, (KERN_NOTICE
3424                 "megaraid mailbox: status:%#x cmd:%#x id:%#x ", scb->status,
3425                 mbox->cmd, scb->sno));
3426
3427         con_log(level, ("sec:%#x lba:%#x addr:%#x ld:%d sg:%d\n",
3428                 mbox->numsectors, mbox->lba, mbox->xferaddr, mbox->logdrv,
3429                 mbox->numsge));
3430
3431         if (!scp) return;
3432
3433         con_log(level, (KERN_NOTICE "scsi cmnd: "));
3434
3435         for (i = 0; i < scp->cmd_len; i++) {
3436                 con_log(level, ("%#2.02x ", scp->cmnd[i]));
3437         }
3438
3439         con_log(level, ("\n"));
3440
3441         return;
3442 }
3443
3444
3445 /**
3446  * megaraid_mbox_setup_device_map - manage device ids
3447  * @adapter     : Driver's soft state
3448  *
3449  * Manange the device ids to have an appropriate mapping between the kernel
3450  * scsi addresses and megaraid scsi and logical drive addresses. We export
3451  * scsi devices on their actual addresses, whereas the logical drives are
3452  * exported on a virtual scsi channel.
3453  */
3454 static void
3455 megaraid_mbox_setup_device_map(adapter_t *adapter)
3456 {
3457         uint8_t         c;
3458         uint8_t         t;
3459
3460         /*
3461          * First fill the values on the logical drive channel
3462          */
3463         for (t = 0; t < LSI_MAX_LOGICAL_DRIVES_64LD; t++)
3464                 adapter->device_ids[adapter->max_channel][t] =
3465                         (t < adapter->init_id) ?  t : t - 1;
3466
3467         adapter->device_ids[adapter->max_channel][adapter->init_id] = 0xFF;
3468
3469         /*
3470          * Fill the values on the physical devices channels
3471          */
3472         for (c = 0; c < adapter->max_channel; c++)
3473                 for (t = 0; t < LSI_MAX_LOGICAL_DRIVES_64LD; t++)
3474                         adapter->device_ids[c][t] = (c << 8) | t;
3475 }
3476
3477
3478 /*
3479  * END: internal commands library
3480  */
3481
3482 /*
3483  * START: Interface for the common management module
3484  *
3485  * This is the module, which interfaces with the common management module to
3486  * provide support for ioctl and sysfs
3487  */
3488
3489 /**
3490  * megaraid_cmm_register - register with the management module
3491  * @adapter             : HBA soft state
3492  *
3493  * Register with the management module, which allows applications to issue
3494  * ioctl calls to the drivers. This interface is used by the management module
3495  * to setup sysfs support as well.
3496  */
3497 static int
3498 megaraid_cmm_register(adapter_t *adapter)
3499 {
3500         mraid_device_t  *raid_dev = ADAP2RAIDDEV(adapter);
3501         mraid_mmadp_t   adp;
3502         scb_t           *scb;
3503         mbox_ccb_t      *ccb;
3504         int             rval;
3505         int             i;
3506
3507         // Allocate memory for the base list of scb for management module.
3508         adapter->uscb_list = kcalloc(MBOX_MAX_USER_CMDS, sizeof(scb_t), GFP_KERNEL);
3509
3510         if (adapter->uscb_list == NULL) {
3511                 con_log(CL_ANN, (KERN_WARNING
3512                         "megaraid: out of memory, %s %d\n", __func__,
3513                         __LINE__));
3514                 return -1;
3515         }
3516
3517
3518         // Initialize the synchronization parameters for resources for
3519         // commands for management module
3520         INIT_LIST_HEAD(&adapter->uscb_pool);
3521
3522         spin_lock_init(USER_FREE_LIST_LOCK(adapter));
3523
3524
3525
3526         // link all the packets. Note, CCB for commands, coming from the
3527         // commom management module, mailbox physical address are already
3528         // setup by it. We just need placeholder for that in our local command
3529         // control blocks
3530         for (i = 0; i < MBOX_MAX_USER_CMDS; i++) {
3531
3532                 scb                     = adapter->uscb_list + i;
3533                 ccb                     = raid_dev->uccb_list + i;
3534
3535                 scb->ccb                = (caddr_t)ccb;
3536                 ccb->mbox64             = raid_dev->umbox64 + i;
3537                 ccb->mbox               = &ccb->mbox64->mbox32;
3538                 ccb->raw_mbox           = (uint8_t *)ccb->mbox;
3539
3540                 scb->gp                 = 0;
3541
3542                 // COMMAND ID 0 - (MBOX_MAX_SCSI_CMDS-1) ARE RESERVED FOR
3543                 // COMMANDS COMING FROM IO SUBSYSTEM (MID-LAYER)
3544                 scb->sno                = i + MBOX_MAX_SCSI_CMDS;
3545
3546                 scb->scp                = NULL;
3547                 scb->state              = SCB_FREE;
3548                 scb->dma_direction      = PCI_DMA_NONE;
3549                 scb->dma_type           = MRAID_DMA_NONE;
3550                 scb->dev_channel        = -1;
3551                 scb->dev_target         = -1;
3552
3553                 // put scb in the free pool
3554                 list_add_tail(&scb->list, &adapter->uscb_pool);
3555         }
3556
3557         adp.unique_id           = adapter->unique_id;
3558         adp.drvr_type           = DRVRTYPE_MBOX;
3559         adp.drvr_data           = (unsigned long)adapter;
3560         adp.pdev                = adapter->pdev;
3561         adp.issue_uioc          = megaraid_mbox_mm_handler;
3562         adp.timeout             = MBOX_RESET_WAIT + MBOX_RESET_EXT_WAIT;
3563         adp.max_kioc            = MBOX_MAX_USER_CMDS;
3564
3565         if ((rval = mraid_mm_register_adp(&adp)) != 0) {
3566
3567                 con_log(CL_ANN, (KERN_WARNING
3568                         "megaraid mbox: did not register with CMM\n"));
3569
3570                 kfree(adapter->uscb_list);
3571         }
3572
3573         return rval;
3574 }
3575
3576
3577 /**
3578  * megaraid_cmm_unregister - un-register with the management module
3579  * @adapter             : HBA soft state
3580  *
3581  * Un-register with the management module.
3582  * FIXME: mgmt module must return failure for unregister if it has pending
3583  * commands in LLD.
3584  */
3585 static int
3586 megaraid_cmm_unregister(adapter_t *adapter)
3587 {
3588         kfree(adapter->uscb_list);
3589         mraid_mm_unregister_adp(adapter->unique_id);
3590         return 0;
3591 }
3592
3593
3594 /**
3595  * megaraid_mbox_mm_handler - interface for CMM to issue commands to LLD
3596  * @drvr_data           : LLD specific data
3597  * @kioc                : CMM interface packet
3598  * @action              : command action
3599  *
3600  * This routine is invoked whenever the Common Management Module (CMM) has a
3601  * command for us. The 'action' parameter specifies if this is a new command
3602  * or otherwise.
3603  */
3604 static int
3605 megaraid_mbox_mm_handler(unsigned long drvr_data, uioc_t *kioc, uint32_t action)
3606 {
3607         adapter_t *adapter;
3608
3609         if (action != IOCTL_ISSUE) {
3610                 con_log(CL_ANN, (KERN_WARNING
3611                         "megaraid: unsupported management action:%#2x\n",
3612                         action));
3613                 return (-ENOTSUPP);
3614         }
3615
3616         adapter = (adapter_t *)drvr_data;
3617
3618         // make sure this adapter is not being detached right now.
3619         if (atomic_read(&adapter->being_detached)) {
3620                 con_log(CL_ANN, (KERN_WARNING
3621                         "megaraid: reject management request, detaching\n"));
3622                 return (-ENODEV);
3623         }
3624
3625         switch (kioc->opcode) {
3626
3627         case GET_ADAP_INFO:
3628
3629                 kioc->status =  gather_hbainfo(adapter, (mraid_hba_info_t *)
3630                                         (unsigned long)kioc->buf_vaddr);
3631
3632                 kioc->done(kioc);
3633
3634                 return kioc->status;
3635
3636         case MBOX_CMD:
3637
3638                 return megaraid_mbox_mm_command(adapter, kioc);
3639
3640         default:
3641                 kioc->status = (-EINVAL);
3642                 kioc->done(kioc);
3643                 return (-EINVAL);
3644         }
3645
3646         return 0;       // not reached
3647 }
3648
3649 /**
3650  * megaraid_mbox_mm_command - issues commands routed through CMM
3651  * @adapter             : HBA soft state
3652  * @kioc                : management command packet
3653  *
3654  * Issues commands, which are routed through the management module.
3655  */
3656 static int
3657 megaraid_mbox_mm_command(adapter_t *adapter, uioc_t *kioc)
3658 {
3659         struct list_head        *head = &adapter->uscb_pool;
3660         mbox64_t                *mbox64;
3661         uint8_t                 *raw_mbox;
3662         scb_t                   *scb;
3663         mbox_ccb_t              *ccb;
3664         unsigned long           flags;
3665
3666         // detach one scb from free pool
3667         spin_lock_irqsave(USER_FREE_LIST_LOCK(adapter), flags);
3668
3669         if (list_empty(head)) { // should never happen because of CMM
3670
3671                 con_log(CL_ANN, (KERN_WARNING
3672                         "megaraid mbox: bug in cmm handler, lost resources\n"));
3673
3674                 spin_unlock_irqrestore(USER_FREE_LIST_LOCK(adapter), flags);
3675
3676                 return (-EINVAL);
3677         }
3678
3679         scb = list_entry(head->next, scb_t, list);
3680         list_del_init(&scb->list);
3681
3682         spin_unlock_irqrestore(USER_FREE_LIST_LOCK(adapter), flags);
3683
3684         scb->state              = SCB_ACTIVE;
3685         scb->dma_type           = MRAID_DMA_NONE;
3686         scb->dma_direction      = PCI_DMA_NONE;
3687
3688         ccb             = (mbox_ccb_t *)scb->ccb;
3689         mbox64          = (mbox64_t *)(unsigned long)kioc->cmdbuf;
3690         raw_mbox        = (uint8_t *)&mbox64->mbox32;
3691
3692         memcpy(ccb->mbox64, mbox64, sizeof(mbox64_t));
3693
3694         scb->gp         = (unsigned long)kioc;
3695
3696         /*
3697          * If it is a logdrv random delete operation, we have to wait till
3698          * there are no outstanding cmds at the fw and then issue it directly
3699          */
3700         if (raw_mbox[0] == FC_DEL_LOGDRV && raw_mbox[2] == OP_DEL_LOGDRV) {
3701
3702                 if (wait_till_fw_empty(adapter)) {
3703                         con_log(CL_ANN, (KERN_NOTICE
3704                                 "megaraid mbox: LD delete, timed out\n"));
3705
3706                         kioc->status = -ETIME;
3707
3708                         scb->status = -1;
3709
3710                         megaraid_mbox_mm_done(adapter, scb);
3711
3712                         return (-ETIME);
3713                 }
3714
3715                 INIT_LIST_HEAD(&scb->list);
3716
3717                 scb->state = SCB_ISSUED;
3718                 if (mbox_post_cmd(adapter, scb) != 0) {
3719
3720                         con_log(CL_ANN, (KERN_NOTICE
3721                                 "megaraid mbox: LD delete, mailbox busy\n"));
3722
3723                         kioc->status = -EBUSY;
3724
3725                         scb->status = -1;
3726
3727                         megaraid_mbox_mm_done(adapter, scb);
3728
3729                         return (-EBUSY);
3730                 }
3731
3732                 return 0;
3733         }
3734
3735         // put the command on the pending list and execute
3736         megaraid_mbox_runpendq(adapter, scb);
3737
3738         return 0;
3739 }
3740
3741
3742 static int
3743 wait_till_fw_empty(adapter_t *adapter)
3744 {
3745         unsigned long   flags = 0;
3746         int             i;
3747
3748
3749         /*
3750          * Set the quiescent flag to stop issuing cmds to FW.
3751          */
3752         spin_lock_irqsave(&adapter->lock, flags);
3753         adapter->quiescent++;
3754         spin_unlock_irqrestore(&adapter->lock, flags);
3755
3756         /*
3757          * Wait till there are no more cmds outstanding at FW. Try for at most
3758          * 60 seconds
3759          */
3760         for (i = 0; i < 60 && adapter->outstanding_cmds; i++) {
3761                 con_log(CL_DLEVEL1, (KERN_INFO
3762                         "megaraid: FW has %d pending commands\n",
3763                         adapter->outstanding_cmds));
3764
3765                 msleep(1000);
3766         }
3767
3768         return adapter->outstanding_cmds;
3769 }
3770
3771
3772 /**
3773  * megaraid_mbox_mm_done - callback for CMM commands
3774  * @adapter     : HBA soft state
3775  * @scb         : completed command
3776  *
3777  * Callback routine for internal commands originated from the management
3778  * module.
3779  */
3780 static void
3781 megaraid_mbox_mm_done(adapter_t *adapter, scb_t *scb)
3782 {
3783         uioc_t                  *kioc;
3784         mbox64_t                *mbox64;
3785         uint8_t                 *raw_mbox;
3786         unsigned long           flags;
3787
3788         kioc                    = (uioc_t *)scb->gp;
3789         mbox64                  = (mbox64_t *)(unsigned long)kioc->cmdbuf;
3790         mbox64->mbox32.status   = scb->status;
3791         raw_mbox                = (uint8_t *)&mbox64->mbox32;
3792
3793
3794         // put scb in the free pool
3795         scb->state      = SCB_FREE;
3796         scb->scp        = NULL;
3797
3798         spin_lock_irqsave(USER_FREE_LIST_LOCK(adapter), flags);
3799
3800         list_add(&scb->list, &adapter->uscb_pool);
3801
3802         spin_unlock_irqrestore(USER_FREE_LIST_LOCK(adapter), flags);
3803
3804         // if a delete logical drive operation succeeded, restart the
3805         // controller
3806         if (raw_mbox[0] == FC_DEL_LOGDRV && raw_mbox[2] == OP_DEL_LOGDRV) {
3807
3808                 adapter->quiescent--;
3809
3810                 megaraid_mbox_runpendq(adapter, NULL);
3811         }
3812
3813         kioc->done(kioc);
3814
3815         return;
3816 }
3817
3818
3819 /**
3820  * gather_hbainfo - HBA characteristics for the applications
3821  * @adapter             : HBA soft state
3822  * @hinfo               : pointer to the caller's host info strucuture
3823  */
3824 static int
3825 gather_hbainfo(adapter_t *adapter, mraid_hba_info_t *hinfo)
3826 {
3827         uint8_t dmajor;
3828
3829         dmajor                  = megaraid_mbox_version[0];
3830
3831         hinfo->pci_vendor_id    = adapter->pdev->vendor;
3832         hinfo->pci_device_id    = adapter->pdev->device;
3833         hinfo->subsys_vendor_id = adapter->pdev->subsystem_vendor;
3834         hinfo->subsys_device_id = adapter->pdev->subsystem_device;
3835
3836         hinfo->pci_bus          = adapter->pdev->bus->number;
3837         hinfo->pci_dev_fn       = adapter->pdev->devfn;
3838         hinfo->pci_slot         = PCI_SLOT(adapter->pdev->devfn);
3839         hinfo->irq              = adapter->host->irq;
3840         hinfo->baseport         = ADAP2RAIDDEV(adapter)->baseport;
3841
3842         hinfo->unique_id        = (hinfo->pci_bus << 8) | adapter->pdev->devfn;
3843         hinfo->host_no          = adapter->host->host_no;
3844
3845         return 0;
3846 }
3847
3848 /*
3849  * END: Interface for the common management module
3850  */
3851
3852
3853
3854 /**
3855  * megaraid_sysfs_alloc_resources - allocate sysfs related resources
3856  * @adapter     : controller's soft state
3857  *
3858  * Allocate packets required to issue FW calls whenever the sysfs attributes
3859  * are read. These attributes would require up-to-date information from the
3860  * FW. Also set up resources for mutual exclusion to share these resources and
3861  * the wait queue.
3862  *
3863  * Return 0 on success.
3864  * Return -ERROR_CODE on failure.
3865  */
3866 static int
3867 megaraid_sysfs_alloc_resources(adapter_t *adapter)
3868 {
3869         mraid_device_t  *raid_dev = ADAP2RAIDDEV(adapter);
3870         int             rval = 0;
3871
3872         raid_dev->sysfs_uioc = kmalloc(sizeof(uioc_t), GFP_KERNEL);
3873
3874         raid_dev->sysfs_mbox64 = kmalloc(sizeof(mbox64_t), GFP_KERNEL);
3875
3876         raid_dev->sysfs_buffer = pci_alloc_consistent(adapter->pdev,
3877                         PAGE_SIZE, &raid_dev->sysfs_buffer_dma);
3878
3879         if (!raid_dev->sysfs_uioc || !raid_dev->sysfs_mbox64 ||
3880                 !raid_dev->sysfs_buffer) {
3881
3882                 con_log(CL_ANN, (KERN_WARNING
3883                         "megaraid: out of memory, %s %d\n", __func__,
3884                         __LINE__));
3885
3886                 rval = -ENOMEM;
3887
3888                 megaraid_sysfs_free_resources(adapter);
3889         }
3890
3891         mutex_init(&raid_dev->sysfs_mtx);
3892
3893         init_waitqueue_head(&raid_dev->sysfs_wait_q);
3894
3895         return rval;
3896 }
3897
3898
3899 /**
3900  * megaraid_sysfs_free_resources - free sysfs related resources
3901  * @adapter     : controller's soft state
3902  *
3903  * Free packets allocated for sysfs FW commands
3904  */
3905 static void
3906 megaraid_sysfs_free_resources(adapter_t *adapter)
3907 {
3908         mraid_device_t  *raid_dev = ADAP2RAIDDEV(adapter);
3909
3910         kfree(raid_dev->sysfs_uioc);
3911         kfree(raid_dev->sysfs_mbox64);
3912
3913         if (raid_dev->sysfs_buffer) {
3914                 pci_free_consistent(adapter->pdev, PAGE_SIZE,
3915                         raid_dev->sysfs_buffer, raid_dev->sysfs_buffer_dma);
3916         }
3917 }
3918
3919
3920 /**
3921  * megaraid_sysfs_get_ldmap_done - callback for get ldmap
3922  * @uioc        : completed packet
3923  *
3924  * Callback routine called in the ISR/tasklet context for get ldmap call
3925  */
3926 static void
3927 megaraid_sysfs_get_ldmap_done(uioc_t *uioc)
3928 {
3929         adapter_t       *adapter = (adapter_t *)uioc->buf_vaddr;
3930         mraid_device_t  *raid_dev = ADAP2RAIDDEV(adapter);
3931
3932         uioc->status = 0;
3933
3934         wake_up(&raid_dev->sysfs_wait_q);
3935 }
3936
3937
3938 /**
3939  * megaraid_sysfs_get_ldmap_timeout - timeout handling for get ldmap
3940  * @data        : timed out packet
3941  *
3942  * Timeout routine to recover and return to application, in case the adapter
3943  * has stopped responding. A timeout of 60 seconds for this command seems like
3944  * a good value.
3945  */
3946 static void
3947 megaraid_sysfs_get_ldmap_timeout(unsigned long data)
3948 {
3949         uioc_t          *uioc = (uioc_t *)data;
3950         adapter_t       *adapter = (adapter_t *)uioc->buf_vaddr;
3951         mraid_device_t  *raid_dev = ADAP2RAIDDEV(adapter);
3952
3953         uioc->status = -ETIME;
3954
3955         wake_up(&raid_dev->sysfs_wait_q);
3956 }
3957
3958
3959 /**
3960  * megaraid_sysfs_get_ldmap - get update logical drive map
3961  * @adapter     : controller's soft state
3962  *
3963  * This routine will be called whenever user reads the logical drive
3964  * attributes, go get the current logical drive mapping table from the
3965  * firmware. We use the management API's to issue commands to the controller.
3966  *
3967  * NOTE: The commands issuance functionality is not generalized and
3968  * implemented in context of "get ld map" command only. If required, the
3969  * command issuance logical can be trivially pulled out and implemented as a
3970  * standalone library. For now, this should suffice since there is no other
3971  * user of this interface.
3972  *
3973  * Return 0 on success.
3974  * Return -1 on failure.
3975  */
3976 static int
3977 megaraid_sysfs_get_ldmap(adapter_t *adapter)
3978 {
3979         mraid_device_t          *raid_dev = ADAP2RAIDDEV(adapter);
3980         uioc_t                  *uioc;
3981         mbox64_t                *mbox64;
3982         mbox_t                  *mbox;
3983         char                    *raw_mbox;
3984         struct timer_list       sysfs_timer;
3985         struct timer_list       *timerp;
3986         caddr_t                 ldmap;
3987         int                     rval = 0;
3988
3989         /*
3990          * Allow only one read at a time to go through the sysfs attributes
3991          */
3992         mutex_lock(&raid_dev->sysfs_mtx);
3993
3994         uioc    = raid_dev->sysfs_uioc;
3995         mbox64  = raid_dev->sysfs_mbox64;
3996         ldmap   = raid_dev->sysfs_buffer;
3997
3998         memset(uioc, 0, sizeof(uioc_t));
3999         memset(mbox64, 0, sizeof(mbox64_t));
4000         memset(ldmap, 0, sizeof(raid_dev->curr_ldmap));
4001
4002         mbox            = &mbox64->mbox32;
4003         raw_mbox        = (char *)mbox;
4004         uioc->cmdbuf    = (uint64_t)(unsigned long)mbox64;
4005         uioc->buf_vaddr = (caddr_t)adapter;
4006         uioc->status    = -ENODATA;
4007         uioc->done      = megaraid_sysfs_get_ldmap_done;
4008
4009         /*
4010          * Prepare the mailbox packet to get the current logical drive mapping
4011          * table
4012          */
4013         mbox->xferaddr = (uint32_t)raid_dev->sysfs_buffer_dma;
4014
4015         raw_mbox[0] = FC_DEL_LOGDRV;
4016         raw_mbox[2] = OP_GET_LDID_MAP;
4017
4018         /*
4019          * Setup a timer to recover from a non-responding controller
4020          */
4021         timerp  = &sysfs_timer;
4022         init_timer(timerp);
4023
4024         timerp->function        = megaraid_sysfs_get_ldmap_timeout;
4025         timerp->data            = (unsigned long)uioc;
4026         timerp->expires         = jiffies + 60 * HZ;
4027
4028         add_timer(timerp);
4029
4030         /*
4031          * Send the command to the firmware
4032          */
4033         rval = megaraid_mbox_mm_command(adapter, uioc);
4034
4035         if (rval == 0) {        // command successfully issued
4036                 wait_event(raid_dev->sysfs_wait_q, (uioc->status != -ENODATA));
4037
4038                 /*
4039                  * Check if the command timed out
4040                  */
4041                 if (uioc->status == -ETIME) {
4042                         con_log(CL_ANN, (KERN_NOTICE
4043                                 "megaraid: sysfs get ld map timed out\n"));
4044
4045                         rval = -ETIME;
4046                 }
4047                 else {
4048                         rval = mbox->status;
4049                 }
4050
4051                 if (rval == 0) {
4052                         memcpy(raid_dev->curr_ldmap, ldmap,
4053                                 sizeof(raid_dev->curr_ldmap));
4054                 }
4055                 else {
4056                         con_log(CL_ANN, (KERN_NOTICE
4057                                 "megaraid: get ld map failed with %x\n", rval));
4058                 }
4059         }
4060         else {
4061                 con_log(CL_ANN, (KERN_NOTICE
4062                         "megaraid: could not issue ldmap command:%x\n", rval));
4063         }
4064
4065
4066         del_timer_sync(timerp);
4067
4068         mutex_unlock(&raid_dev->sysfs_mtx);
4069
4070         return rval;
4071 }
4072
4073
4074 /**
4075  * megaraid_sysfs_show_app_hndl - display application handle for this adapter
4076  * @cdev        : class device object representation for the host
4077  * @buf         : buffer to send data to
4078  *
4079  * Display the handle used by the applications while executing management
4080  * tasks on the adapter. We invoke a management module API to get the adapter
4081  * handle, since we do not interface with applications directly.
4082  */
4083 static ssize_t
4084 megaraid_sysfs_show_app_hndl(struct device *dev, struct device_attribute *attr,
4085                              char *buf)
4086 {
4087         struct Scsi_Host *shost = class_to_shost(dev);
4088         adapter_t       *adapter = (adapter_t *)SCSIHOST2ADAP(shost);
4089         uint32_t        app_hndl;
4090
4091         app_hndl = mraid_mm_adapter_app_handle(adapter->unique_id);
4092
4093         return snprintf(buf, 8, "%u\n", app_hndl);
4094 }
4095
4096
4097 /**
4098  * megaraid_sysfs_show_ldnum - display the logical drive number for this device
4099  * @dev         : device object representation for the scsi device
4100  * @attr        : device attribute to show
4101  * @buf         : buffer to send data to
4102  *
4103  * Display the logical drive number for the device in question, if it a valid
4104  * logical drive. For physical devices, "-1" is returned.
4105  *
4106  * The logical drive number is displayed in following format:
4107  *
4108  * <SCSI ID> <LD NUM> <LD STICKY ID> <APP ADAPTER HANDLE>
4109  *
4110  *   <int>     <int>       <int>            <int>
4111  */
4112 static ssize_t
4113 megaraid_sysfs_show_ldnum(struct device *dev, struct device_attribute *attr, char *buf)
4114 {
4115         struct scsi_device *sdev = to_scsi_device(dev);
4116         adapter_t       *adapter = (adapter_t *)SCSIHOST2ADAP(sdev->host);
4117         mraid_device_t  *raid_dev = ADAP2RAIDDEV(adapter);
4118         int             scsi_id = -1;
4119         int             logical_drv = -1;
4120         int             ldid_map = -1;
4121         uint32_t        app_hndl = 0;
4122         int             mapped_sdev_id;
4123         int             rval;
4124         int             i;
4125
4126         if (raid_dev->random_del_supported &&
4127                         MRAID_IS_LOGICAL_SDEV(adapter, sdev)) {
4128
4129                 rval = megaraid_sysfs_get_ldmap(adapter);
4130                 if (rval == 0) {
4131
4132                         for (i = 0; i < MAX_LOGICAL_DRIVES_40LD; i++) {
4133
4134                                 mapped_sdev_id = sdev->id;
4135
4136                                 if (sdev->id > adapter->init_id) {
4137                                         mapped_sdev_id -= 1;
4138                                 }
4139
4140                                 if (raid_dev->curr_ldmap[i] == mapped_sdev_id) {
4141
4142                                         scsi_id = sdev->id;
4143
4144                                         logical_drv = i;
4145
4146                                         ldid_map = raid_dev->curr_ldmap[i];
4147
4148                                         app_hndl = mraid_mm_adapter_app_handle(
4149                                                         adapter->unique_id);
4150
4151                                         break;
4152                                 }
4153                         }
4154                 }
4155                 else {
4156                         con_log(CL_ANN, (KERN_NOTICE
4157                                 "megaraid: sysfs get ld map failed: %x\n",
4158                                 rval));
4159                 }
4160         }
4161
4162         return snprintf(buf, 36, "%d %d %d %d\n", scsi_id, logical_drv,
4163                         ldid_map, app_hndl);
4164 }
4165
4166
4167 /*
4168  * END: Mailbox Low Level Driver
4169  */
4170 module_init(megaraid_init);
4171 module_exit(megaraid_exit);
4172
4173 /* vim: set ts=8 sw=8 tw=78 ai si: */