linux/drivers/scsi/megaraid/megaraid_mbox.c
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   1// SPDX-License-Identifier: GPL-2.0-or-later
   2/*
   3 *
   4 *                      Linux MegaRAID device driver
   5 *
   6 * Copyright (c) 2003-2004  LSI Logic Corporation.
   7 *
   8 * FILE         : megaraid_mbox.c
   9 * Version      : v2.20.5.1 (Nov 16 2006)
  10 *
  11 * Authors:
  12 *      Atul Mukker             <Atul.Mukker@lsi.com>
  13 *      Sreenivas Bagalkote     <Sreenivas.Bagalkote@lsi.com>
  14 *      Manoj Jose              <Manoj.Jose@lsi.com>
  15 *      Seokmann Ju
  16 *
  17 * List of supported controllers
  18 *
  19 * OEM  Product Name                    VID     DID     SSVID   SSID
  20 * ---  ------------                    ---     ---     ----    ----
  21 * Dell PERC3/QC                        101E    1960    1028    0471
  22 * Dell PERC3/DC                        101E    1960    1028    0493
  23 * Dell PERC3/SC                        101E    1960    1028    0475
  24 * Dell PERC3/Di                        1028    1960    1028    0123
  25 * Dell PERC4/SC                        1000    1960    1028    0520
  26 * Dell PERC4/DC                        1000    1960    1028    0518
  27 * Dell PERC4/QC                        1000    0407    1028    0531
  28 * Dell PERC4/Di                        1028    000F    1028    014A
  29 * Dell PERC 4e/Si                      1028    0013    1028    016c
  30 * Dell PERC 4e/Di                      1028    0013    1028    016d
  31 * Dell PERC 4e/Di                      1028    0013    1028    016e
  32 * Dell PERC 4e/Di                      1028    0013    1028    016f
  33 * Dell PERC 4e/Di                      1028    0013    1028    0170
  34 * Dell PERC 4e/DC                      1000    0408    1028    0002
  35 * Dell PERC 4e/SC                      1000    0408    1028    0001
  36 *
  37 * LSI MegaRAID SCSI 320-0              1000    1960    1000    A520
  38 * LSI MegaRAID SCSI 320-1              1000    1960    1000    0520
  39 * LSI MegaRAID SCSI 320-2              1000    1960    1000    0518
  40 * LSI MegaRAID SCSI 320-0X             1000    0407    1000    0530
  41 * LSI MegaRAID SCSI 320-2X             1000    0407    1000    0532
  42 * LSI MegaRAID SCSI 320-4X             1000    0407    1000    0531
  43 * LSI MegaRAID SCSI 320-1E             1000    0408    1000    0001
  44 * LSI MegaRAID SCSI 320-2E             1000    0408    1000    0002
  45 * LSI MegaRAID SATA 150-4              1000    1960    1000    4523
  46 * LSI MegaRAID SATA 150-6              1000    1960    1000    0523
  47 * LSI MegaRAID SATA 300-4X             1000    0409    1000    3004
  48 * LSI MegaRAID SATA 300-8X             1000    0409    1000    3008
  49 *
  50 * INTEL RAID Controller SRCU42X        1000    0407    8086    0532
  51 * INTEL RAID Controller SRCS16         1000    1960    8086    0523
  52 * INTEL RAID Controller SRCU42E        1000    0408    8086    0002
  53 * INTEL RAID Controller SRCZCRX        1000    0407    8086    0530
  54 * INTEL RAID Controller SRCS28X        1000    0409    8086    3008
  55 * INTEL RAID Controller SROMBU42E      1000    0408    8086    3431
  56 * INTEL RAID Controller SROMBU42E      1000    0408    8086    3499
  57 * INTEL RAID Controller SRCU51L        1000    1960    8086    0520
  58 *
  59 * FSC  MegaRAID PCI Express ROMB       1000    0408    1734    1065
  60 *
  61 * ACER MegaRAID ROMB-2E                1000    0408    1025    004D
  62 *
  63 * NEC  MegaRAID PCI Express ROMB       1000    0408    1033    8287
  64 *
  65 * For history of changes, see Documentation/scsi/ChangeLog.megaraid
  66 */
  67
  68#include <linux/slab.h>
  69#include <linux/module.h>
  70#include "megaraid_mbox.h"
  71
  72static int megaraid_init(void);
  73static void megaraid_exit(void);
  74
  75static int megaraid_probe_one(struct pci_dev*, const struct pci_device_id *);
  76static void megaraid_detach_one(struct pci_dev *);
  77static void megaraid_mbox_shutdown(struct pci_dev *);
  78
  79static int megaraid_io_attach(adapter_t *);
  80static void megaraid_io_detach(adapter_t *);
  81
  82static int megaraid_init_mbox(adapter_t *);
  83static void megaraid_fini_mbox(adapter_t *);
  84
  85static int megaraid_alloc_cmd_packets(adapter_t *);
  86static void megaraid_free_cmd_packets(adapter_t *);
  87
  88static int megaraid_mbox_setup_dma_pools(adapter_t *);
  89static void megaraid_mbox_teardown_dma_pools(adapter_t *);
  90
  91static int megaraid_sysfs_alloc_resources(adapter_t *);
  92static void megaraid_sysfs_free_resources(adapter_t *);
  93
  94static int megaraid_abort_handler(struct scsi_cmnd *);
  95static int megaraid_reset_handler(struct scsi_cmnd *);
  96
  97static int mbox_post_sync_cmd(adapter_t *, uint8_t []);
  98static int mbox_post_sync_cmd_fast(adapter_t *, uint8_t []);
  99static int megaraid_busywait_mbox(mraid_device_t *);
 100static int megaraid_mbox_product_info(adapter_t *);
 101static int megaraid_mbox_extended_cdb(adapter_t *);
 102static int megaraid_mbox_support_ha(adapter_t *, uint16_t *);
 103static int megaraid_mbox_support_random_del(adapter_t *);
 104static int megaraid_mbox_get_max_sg(adapter_t *);
 105static void megaraid_mbox_enum_raid_scsi(adapter_t *);
 106static void megaraid_mbox_flush_cache(adapter_t *);
 107static int megaraid_mbox_fire_sync_cmd(adapter_t *);
 108
 109static void megaraid_mbox_display_scb(adapter_t *, scb_t *);
 110static void megaraid_mbox_setup_device_map(adapter_t *);
 111
 112static int megaraid_queue_command(struct Scsi_Host *, struct scsi_cmnd *);
 113static scb_t *megaraid_mbox_build_cmd(adapter_t *, struct scsi_cmnd *, int *);
 114static void megaraid_mbox_runpendq(adapter_t *, scb_t *);
 115static void megaraid_mbox_prepare_pthru(adapter_t *, scb_t *,
 116                struct scsi_cmnd *);
 117static void megaraid_mbox_prepare_epthru(adapter_t *, scb_t *,
 118                struct scsi_cmnd *);
 119
 120static irqreturn_t megaraid_isr(int, void *);
 121
 122static void megaraid_mbox_dpc(unsigned long);
 123
 124static ssize_t megaraid_mbox_app_hndl_show(struct device *, struct device_attribute *attr, char *);
 125static ssize_t megaraid_mbox_ld_show(struct device *, struct device_attribute *attr, char *);
 126
 127static int megaraid_cmm_register(adapter_t *);
 128static int megaraid_cmm_unregister(adapter_t *);
 129static int megaraid_mbox_mm_handler(unsigned long, uioc_t *, uint32_t);
 130static int megaraid_mbox_mm_command(adapter_t *, uioc_t *);
 131static void megaraid_mbox_mm_done(adapter_t *, scb_t *);
 132static int gather_hbainfo(adapter_t *, mraid_hba_info_t *);
 133static int wait_till_fw_empty(adapter_t *);
 134
 135
 136
 137MODULE_AUTHOR("megaraidlinux@lsi.com");
 138MODULE_DESCRIPTION("LSI Logic MegaRAID Mailbox Driver");
 139MODULE_LICENSE("GPL");
 140MODULE_VERSION(MEGARAID_VERSION);
 141
 142/*
 143 * ### modules parameters for driver ###
 144 */
 145
 146/*
 147 * Set to enable driver to expose unconfigured disk to kernel
 148 */
 149static int megaraid_expose_unconf_disks = 0;
 150module_param_named(unconf_disks, megaraid_expose_unconf_disks, int, 0);
 151MODULE_PARM_DESC(unconf_disks,
 152        "Set to expose unconfigured disks to kernel (default=0)");
 153
 154/*
 155 * driver wait time if the adapter's mailbox is busy
 156 */
 157static unsigned int max_mbox_busy_wait = MBOX_BUSY_WAIT;
 158module_param_named(busy_wait, max_mbox_busy_wait, int, 0);
 159MODULE_PARM_DESC(busy_wait,
 160        "Max wait for mailbox in microseconds if busy (default=10)");
 161
 162/*
 163 * number of sectors per IO command
 164 */
 165static unsigned int megaraid_max_sectors = MBOX_MAX_SECTORS;
 166module_param_named(max_sectors, megaraid_max_sectors, int, 0);
 167MODULE_PARM_DESC(max_sectors,
 168        "Maximum number of sectors per IO command (default=128)");
 169
 170/*
 171 * number of commands per logical unit
 172 */
 173static unsigned int megaraid_cmd_per_lun = MBOX_DEF_CMD_PER_LUN;
 174module_param_named(cmd_per_lun, megaraid_cmd_per_lun, int, 0);
 175MODULE_PARM_DESC(cmd_per_lun,
 176        "Maximum number of commands per logical unit (default=64)");
 177
 178
 179/*
 180 * Fast driver load option, skip scanning for physical devices during load.
 181 * This would result in non-disk devices being skipped during driver load
 182 * time. These can be later added though, using /proc/scsi/scsi
 183 */
 184static unsigned int megaraid_fast_load = 0;
 185module_param_named(fast_load, megaraid_fast_load, int, 0);
 186MODULE_PARM_DESC(fast_load,
 187        "Faster loading of the driver, skips physical devices! (default=0)");
 188
 189
 190/*
 191 * mraid_debug level - threshold for amount of information to be displayed by
 192 * the driver. This level can be changed through modules parameters, ioctl or
 193 * sysfs/proc interface. By default, print the announcement messages only.
 194 */
 195int mraid_debug_level = CL_ANN;
 196module_param_named(debug_level, mraid_debug_level, int, 0);
 197MODULE_PARM_DESC(debug_level, "Debug level for driver (default=0)");
 198
 199/*
 200 * PCI table for all supported controllers.
 201 */
 202static struct pci_device_id pci_id_table_g[] =  {
 203        {
 204                PCI_VENDOR_ID_DELL,
 205                PCI_DEVICE_ID_PERC4_DI_DISCOVERY,
 206                PCI_VENDOR_ID_DELL,
 207                PCI_SUBSYS_ID_PERC4_DI_DISCOVERY,
 208        },
 209        {
 210                PCI_VENDOR_ID_LSI_LOGIC,
 211                PCI_DEVICE_ID_PERC4_SC,
 212                PCI_VENDOR_ID_DELL,
 213                PCI_SUBSYS_ID_PERC4_SC,
 214        },
 215        {
 216                PCI_VENDOR_ID_LSI_LOGIC,
 217                PCI_DEVICE_ID_PERC4_DC,
 218                PCI_VENDOR_ID_DELL,
 219                PCI_SUBSYS_ID_PERC4_DC,
 220        },
 221        {
 222                PCI_VENDOR_ID_LSI_LOGIC,
 223                PCI_DEVICE_ID_VERDE,
 224                PCI_ANY_ID,
 225                PCI_ANY_ID,
 226        },
 227        {
 228                PCI_VENDOR_ID_DELL,
 229                PCI_DEVICE_ID_PERC4_DI_EVERGLADES,
 230                PCI_VENDOR_ID_DELL,
 231                PCI_SUBSYS_ID_PERC4_DI_EVERGLADES,
 232        },
 233        {
 234                PCI_VENDOR_ID_DELL,
 235                PCI_DEVICE_ID_PERC4E_SI_BIGBEND,
 236                PCI_VENDOR_ID_DELL,
 237                PCI_SUBSYS_ID_PERC4E_SI_BIGBEND,
 238        },
 239        {
 240                PCI_VENDOR_ID_DELL,
 241                PCI_DEVICE_ID_PERC4E_DI_KOBUK,
 242                PCI_VENDOR_ID_DELL,
 243                PCI_SUBSYS_ID_PERC4E_DI_KOBUK,
 244        },
 245        {
 246                PCI_VENDOR_ID_DELL,
 247                PCI_DEVICE_ID_PERC4E_DI_CORVETTE,
 248                PCI_VENDOR_ID_DELL,
 249                PCI_SUBSYS_ID_PERC4E_DI_CORVETTE,
 250        },
 251        {
 252                PCI_VENDOR_ID_DELL,
 253                PCI_DEVICE_ID_PERC4E_DI_EXPEDITION,
 254                PCI_VENDOR_ID_DELL,
 255                PCI_SUBSYS_ID_PERC4E_DI_EXPEDITION,
 256        },
 257        {
 258                PCI_VENDOR_ID_DELL,
 259                PCI_DEVICE_ID_PERC4E_DI_GUADALUPE,
 260                PCI_VENDOR_ID_DELL,
 261                PCI_SUBSYS_ID_PERC4E_DI_GUADALUPE,
 262        },
 263        {
 264                PCI_VENDOR_ID_LSI_LOGIC,
 265                PCI_DEVICE_ID_DOBSON,
 266                PCI_ANY_ID,
 267                PCI_ANY_ID,
 268        },
 269        {
 270                PCI_VENDOR_ID_AMI,
 271                PCI_DEVICE_ID_AMI_MEGARAID3,
 272                PCI_ANY_ID,
 273                PCI_ANY_ID,
 274        },
 275        {
 276                PCI_VENDOR_ID_LSI_LOGIC,
 277                PCI_DEVICE_ID_AMI_MEGARAID3,
 278                PCI_ANY_ID,
 279                PCI_ANY_ID,
 280        },
 281        {
 282                PCI_VENDOR_ID_LSI_LOGIC,
 283                PCI_DEVICE_ID_LINDSAY,
 284                PCI_ANY_ID,
 285                PCI_ANY_ID,
 286        },
 287        {0}     /* Terminating entry */
 288};
 289MODULE_DEVICE_TABLE(pci, pci_id_table_g);
 290
 291
 292static struct pci_driver megaraid_pci_driver = {
 293        .name           = "megaraid",
 294        .id_table       = pci_id_table_g,
 295        .probe          = megaraid_probe_one,
 296        .remove         = megaraid_detach_one,
 297        .shutdown       = megaraid_mbox_shutdown,
 298};
 299
 300
 301
 302// definitions for the device attributes for exporting logical drive number
 303// for a scsi address (Host, Channel, Id, Lun)
 304
 305static DEVICE_ATTR_ADMIN_RO(megaraid_mbox_app_hndl);
 306
 307// Host template initializer for megaraid mbox sysfs device attributes
 308static struct device_attribute *megaraid_shost_attrs[] = {
 309        &dev_attr_megaraid_mbox_app_hndl,
 310        NULL,
 311};
 312
 313
 314static DEVICE_ATTR_ADMIN_RO(megaraid_mbox_ld);
 315
 316// Host template initializer for megaraid mbox sysfs device attributes
 317static struct device_attribute *megaraid_sdev_attrs[] = {
 318        &dev_attr_megaraid_mbox_ld,
 319        NULL,
 320};
 321
 322/*
 323 * Scsi host template for megaraid unified driver
 324 */
 325static struct scsi_host_template megaraid_template_g = {
 326        .module                         = THIS_MODULE,
 327        .name                           = "LSI Logic MegaRAID driver",
 328        .proc_name                      = "megaraid",
 329        .queuecommand                   = megaraid_queue_command,
 330        .eh_abort_handler               = megaraid_abort_handler,
 331        .eh_host_reset_handler          = megaraid_reset_handler,
 332        .change_queue_depth             = scsi_change_queue_depth,
 333        .no_write_same                  = 1,
 334        .sdev_attrs                     = megaraid_sdev_attrs,
 335        .shost_attrs                    = megaraid_shost_attrs,
 336};
 337
 338
 339/**
 340 * megaraid_init - module load hook
 341 *
 342 * We register ourselves as hotplug enabled module and let PCI subsystem
 343 * discover our adapters.
 344 */
 345static int __init
 346megaraid_init(void)
 347{
 348        int     rval;
 349
 350        // Announce the driver version
 351        con_log(CL_ANN, (KERN_INFO "megaraid: %s %s\n", MEGARAID_VERSION,
 352                MEGARAID_EXT_VERSION));
 353
 354        // check validity of module parameters
 355        if (megaraid_cmd_per_lun > MBOX_MAX_SCSI_CMDS) {
 356
 357                con_log(CL_ANN, (KERN_WARNING
 358                        "megaraid mailbox: max commands per lun reset to %d\n",
 359                        MBOX_MAX_SCSI_CMDS));
 360
 361                megaraid_cmd_per_lun = MBOX_MAX_SCSI_CMDS;
 362        }
 363
 364
 365        // register as a PCI hot-plug driver module
 366        rval = pci_register_driver(&megaraid_pci_driver);
 367        if (rval < 0) {
 368                con_log(CL_ANN, (KERN_WARNING
 369                        "megaraid: could not register hotplug support.\n"));
 370        }
 371
 372        return rval;
 373}
 374
 375
 376/**
 377 * megaraid_exit - driver unload entry point
 378 *
 379 * We simply unwrap the megaraid_init routine here.
 380 */
 381static void __exit
 382megaraid_exit(void)
 383{
 384        con_log(CL_DLEVEL1, (KERN_NOTICE "megaraid: unloading framework\n"));
 385
 386        // unregister as PCI hotplug driver
 387        pci_unregister_driver(&megaraid_pci_driver);
 388
 389        return;
 390}
 391
 392
 393/**
 394 * megaraid_probe_one - PCI hotplug entry point
 395 * @pdev        : handle to this controller's PCI configuration space
 396 * @id          : pci device id of the class of controllers
 397 *
 398 * This routine should be called whenever a new adapter is detected by the
 399 * PCI hotplug susbsystem.
 400 */
 401static int
 402megaraid_probe_one(struct pci_dev *pdev, const struct pci_device_id *id)
 403{
 404        adapter_t       *adapter;
 405
 406
 407        // detected a new controller
 408        con_log(CL_ANN, (KERN_INFO
 409                "megaraid: probe new device %#4.04x:%#4.04x:%#4.04x:%#4.04x: ",
 410                pdev->vendor, pdev->device, pdev->subsystem_vendor,
 411                pdev->subsystem_device));
 412
 413        con_log(CL_ANN, ("bus %d:slot %d:func %d\n", pdev->bus->number,
 414                PCI_SLOT(pdev->devfn), PCI_FUNC(pdev->devfn)));
 415
 416        if (pci_enable_device(pdev)) {
 417                con_log(CL_ANN, (KERN_WARNING
 418                                "megaraid: pci_enable_device failed\n"));
 419
 420                return -ENODEV;
 421        }
 422
 423        // Enable bus-mastering on this controller
 424        pci_set_master(pdev);
 425
 426        // Allocate the per driver initialization structure
 427        adapter = kzalloc(sizeof(adapter_t), GFP_KERNEL);
 428
 429        if (adapter == NULL) {
 430                con_log(CL_ANN, (KERN_WARNING
 431                "megaraid: out of memory, %s %d.\n", __func__, __LINE__));
 432
 433                goto out_probe_one;
 434        }
 435
 436
 437        // set up PCI related soft state and other pre-known parameters
 438        adapter->unique_id      = pdev->bus->number << 8 | pdev->devfn;
 439        adapter->irq            = pdev->irq;
 440        adapter->pdev           = pdev;
 441
 442        atomic_set(&adapter->being_detached, 0);
 443
 444        // Setup the default DMA mask. This would be changed later on
 445        // depending on hardware capabilities
 446        if (dma_set_mask(&adapter->pdev->dev, DMA_BIT_MASK(32))) {
 447                con_log(CL_ANN, (KERN_WARNING
 448                        "megaraid: dma_set_mask failed:%d\n", __LINE__));
 449
 450                goto out_free_adapter;
 451        }
 452
 453
 454        // Initialize the synchronization lock for kernel and LLD
 455        spin_lock_init(&adapter->lock);
 456
 457        // Initialize the command queues: the list of free SCBs and the list
 458        // of pending SCBs.
 459        INIT_LIST_HEAD(&adapter->kscb_pool);
 460        spin_lock_init(SCSI_FREE_LIST_LOCK(adapter));
 461
 462        INIT_LIST_HEAD(&adapter->pend_list);
 463        spin_lock_init(PENDING_LIST_LOCK(adapter));
 464
 465        INIT_LIST_HEAD(&adapter->completed_list);
 466        spin_lock_init(COMPLETED_LIST_LOCK(adapter));
 467
 468
 469        // Start the mailbox based controller
 470        if (megaraid_init_mbox(adapter) != 0) {
 471                con_log(CL_ANN, (KERN_WARNING
 472                        "megaraid: mailbox adapter did not initialize\n"));
 473
 474                goto out_free_adapter;
 475        }
 476
 477        // Register with LSI Common Management Module
 478        if (megaraid_cmm_register(adapter) != 0) {
 479
 480                con_log(CL_ANN, (KERN_WARNING
 481                "megaraid: could not register with management module\n"));
 482
 483                goto out_fini_mbox;
 484        }
 485
 486        // setup adapter handle in PCI soft state
 487        pci_set_drvdata(pdev, adapter);
 488
 489        // attach with scsi mid-layer
 490        if (megaraid_io_attach(adapter) != 0) {
 491
 492                con_log(CL_ANN, (KERN_WARNING "megaraid: io attach failed\n"));
 493
 494                goto out_cmm_unreg;
 495        }
 496
 497        return 0;
 498
 499out_cmm_unreg:
 500        megaraid_cmm_unregister(adapter);
 501out_fini_mbox:
 502        megaraid_fini_mbox(adapter);
 503out_free_adapter:
 504        kfree(adapter);
 505out_probe_one:
 506        pci_disable_device(pdev);
 507
 508        return -ENODEV;
 509}
 510
 511
 512/**
 513 * megaraid_detach_one - release framework resources and call LLD release routine
 514 * @pdev        : handle for our PCI configuration space
 515 *
 516 * This routine is called during driver unload. We free all the allocated
 517 * resources and call the corresponding LLD so that it can also release all
 518 * its resources.
 519 *
 520 * This routine is also called from the PCI hotplug system.
 521 */
 522static void
 523megaraid_detach_one(struct pci_dev *pdev)
 524{
 525        adapter_t               *adapter;
 526        struct Scsi_Host        *host;
 527
 528
 529        // Start a rollback on this adapter
 530        adapter = pci_get_drvdata(pdev);
 531
 532        if (!adapter) {
 533                con_log(CL_ANN, (KERN_CRIT
 534                "megaraid: Invalid detach on %#4.04x:%#4.04x:%#4.04x:%#4.04x\n",
 535                        pdev->vendor, pdev->device, pdev->subsystem_vendor,
 536                        pdev->subsystem_device));
 537
 538                return;
 539        }
 540        else {
 541                con_log(CL_ANN, (KERN_NOTICE
 542                "megaraid: detaching device %#4.04x:%#4.04x:%#4.04x:%#4.04x\n",
 543                        pdev->vendor, pdev->device, pdev->subsystem_vendor,
 544                        pdev->subsystem_device));
 545        }
 546
 547
 548        host = adapter->host;
 549
 550        // do not allow any more requests from the management module for this
 551        // adapter.
 552        // FIXME: How do we account for the request which might still be
 553        // pending with us?
 554        atomic_set(&adapter->being_detached, 1);
 555
 556        // detach from the IO sub-system
 557        megaraid_io_detach(adapter);
 558
 559        // Unregister from common management module
 560        //
 561        // FIXME: this must return success or failure for conditions if there
 562        // is a command pending with LLD or not.
 563        megaraid_cmm_unregister(adapter);
 564
 565        // finalize the mailbox based controller and release all resources
 566        megaraid_fini_mbox(adapter);
 567
 568        kfree(adapter);
 569
 570        scsi_host_put(host);
 571
 572        pci_disable_device(pdev);
 573
 574        return;
 575}
 576
 577
 578/**
 579 * megaraid_mbox_shutdown - PCI shutdown for megaraid HBA
 580 * @pdev                : generic driver model device
 581 *
 582 * Shutdown notification, perform flush cache.
 583 */
 584static void
 585megaraid_mbox_shutdown(struct pci_dev *pdev)
 586{
 587        adapter_t               *adapter = pci_get_drvdata(pdev);
 588        static int              counter;
 589
 590        if (!adapter) {
 591                con_log(CL_ANN, (KERN_WARNING
 592                        "megaraid: null device in shutdown\n"));
 593                return;
 594        }
 595
 596        // flush caches now
 597        con_log(CL_ANN, (KERN_INFO "megaraid: flushing adapter %d...",
 598                counter++));
 599
 600        megaraid_mbox_flush_cache(adapter);
 601
 602        con_log(CL_ANN, ("done\n"));
 603}
 604
 605
 606/**
 607 * megaraid_io_attach - attach a device with the IO subsystem
 608 * @adapter             : controller's soft state
 609 *
 610 * Attach this device with the IO subsystem.
 611 */
 612static int
 613megaraid_io_attach(adapter_t *adapter)
 614{
 615        struct Scsi_Host        *host;
 616
 617        // Initialize SCSI Host structure
 618        host = scsi_host_alloc(&megaraid_template_g, 8);
 619        if (!host) {
 620                con_log(CL_ANN, (KERN_WARNING
 621                        "megaraid mbox: scsi_register failed\n"));
 622
 623                return -1;
 624        }
 625
 626        SCSIHOST2ADAP(host)     = (caddr_t)adapter;
 627        adapter->host           = host;
 628
 629        host->irq               = adapter->irq;
 630        host->unique_id         = adapter->unique_id;
 631        host->can_queue         = adapter->max_cmds;
 632        host->this_id           = adapter->init_id;
 633        host->sg_tablesize      = adapter->sglen;
 634        host->max_sectors       = adapter->max_sectors;
 635        host->cmd_per_lun       = adapter->cmd_per_lun;
 636        host->max_channel       = adapter->max_channel;
 637        host->max_id            = adapter->max_target;
 638        host->max_lun           = adapter->max_lun;
 639
 640
 641        // notify mid-layer about the new controller
 642        if (scsi_add_host(host, &adapter->pdev->dev)) {
 643
 644                con_log(CL_ANN, (KERN_WARNING
 645                        "megaraid mbox: scsi_add_host failed\n"));
 646
 647                scsi_host_put(host);
 648
 649                return -1;
 650        }
 651
 652        scsi_scan_host(host);
 653
 654        return 0;
 655}
 656
 657
 658/**
 659 * megaraid_io_detach - detach a device from the IO subsystem
 660 * @adapter             : controller's soft state
 661 *
 662 * Detach this device from the IO subsystem.
 663 */
 664static void
 665megaraid_io_detach(adapter_t *adapter)
 666{
 667        struct Scsi_Host        *host;
 668
 669        con_log(CL_DLEVEL1, (KERN_INFO "megaraid: io detach\n"));
 670
 671        host = adapter->host;
 672
 673        scsi_remove_host(host);
 674
 675        return;
 676}
 677
 678
 679/*
 680 * START: Mailbox Low Level Driver
 681 *
 682 * This is section specific to the single mailbox based controllers
 683 */
 684
 685/**
 686 * megaraid_init_mbox - initialize controller
 687 * @adapter             : our soft state
 688 *
 689 * - Allocate 16-byte aligned mailbox memory for firmware handshake
 690 * - Allocate controller's memory resources
 691 * - Find out all initialization data
 692 * - Allocate memory required for all the commands
 693 * - Use internal library of FW routines, build up complete soft state
 694 */
 695static int
 696megaraid_init_mbox(adapter_t *adapter)
 697{
 698        struct pci_dev          *pdev;
 699        mraid_device_t          *raid_dev;
 700        int                     i;
 701        uint32_t                magic64;
 702
 703
 704        adapter->ito    = MBOX_TIMEOUT;
 705        pdev            = adapter->pdev;
 706
 707        /*
 708         * Allocate and initialize the init data structure for mailbox
 709         * controllers
 710         */
 711        raid_dev = kzalloc(sizeof(mraid_device_t), GFP_KERNEL);
 712        if (raid_dev == NULL) return -1;
 713
 714
 715        /*
 716         * Attach the adapter soft state to raid device soft state
 717         */
 718        adapter->raid_device    = (caddr_t)raid_dev;
 719        raid_dev->fast_load     = megaraid_fast_load;
 720
 721
 722        // our baseport
 723        raid_dev->baseport = pci_resource_start(pdev, 0);
 724
 725        if (pci_request_regions(pdev, "MegaRAID: LSI Logic Corporation") != 0) {
 726
 727                con_log(CL_ANN, (KERN_WARNING
 728                                "megaraid: mem region busy\n"));
 729
 730                goto out_free_raid_dev;
 731        }
 732
 733        raid_dev->baseaddr = ioremap(raid_dev->baseport, 128);
 734
 735        if (!raid_dev->baseaddr) {
 736
 737                con_log(CL_ANN, (KERN_WARNING
 738                        "megaraid: could not map hba memory\n") );
 739
 740                goto out_release_regions;
 741        }
 742
 743        /* initialize the mutual exclusion lock for the mailbox */
 744        spin_lock_init(&raid_dev->mailbox_lock);
 745
 746        /* allocate memory required for commands */
 747        if (megaraid_alloc_cmd_packets(adapter) != 0)
 748                goto out_iounmap;
 749
 750        /*
 751         * Issue SYNC cmd to flush the pending cmds in the adapter
 752         * and initialize its internal state
 753         */
 754
 755        if (megaraid_mbox_fire_sync_cmd(adapter))
 756                con_log(CL_ANN, ("megaraid: sync cmd failed\n"));
 757
 758        /*
 759         * Setup the rest of the soft state using the library of
 760         * FW routines
 761         */
 762
 763        /* request IRQ and register the interrupt service routine */
 764        if (request_irq(adapter->irq, megaraid_isr, IRQF_SHARED, "megaraid",
 765                adapter)) {
 766
 767                con_log(CL_ANN, (KERN_WARNING
 768                        "megaraid: Couldn't register IRQ %d!\n", adapter->irq));
 769                goto out_alloc_cmds;
 770
 771        }
 772
 773        // Product info
 774        if (megaraid_mbox_product_info(adapter) != 0)
 775                goto out_free_irq;
 776
 777        // Do we support extended CDBs
 778        adapter->max_cdb_sz = 10;
 779        if (megaraid_mbox_extended_cdb(adapter) == 0) {
 780                adapter->max_cdb_sz = 16;
 781        }
 782
 783        /*
 784         * Do we support cluster environment, if we do, what is the initiator
 785         * id.
 786         * NOTE: In a non-cluster aware firmware environment, the LLD should
 787         * return 7 as initiator id.
 788         */
 789        adapter->ha             = 0;
 790        adapter->init_id        = -1;
 791        if (megaraid_mbox_support_ha(adapter, &adapter->init_id) == 0) {
 792                adapter->ha = 1;
 793        }
 794
 795        /*
 796         * Prepare the device ids array to have the mapping between the kernel
 797         * device address and megaraid device address.
 798         * We export the physical devices on their actual addresses. The
 799         * logical drives are exported on a virtual SCSI channel
 800         */
 801        megaraid_mbox_setup_device_map(adapter);
 802
 803        // If the firmware supports random deletion, update the device id map
 804        if (megaraid_mbox_support_random_del(adapter)) {
 805
 806                // Change the logical drives numbers in device_ids array one
 807                // slot in device_ids is reserved for target id, that's why
 808                // "<=" below
 809                for (i = 0; i <= MAX_LOGICAL_DRIVES_40LD; i++) {
 810                        adapter->device_ids[adapter->max_channel][i] += 0x80;
 811                }
 812                adapter->device_ids[adapter->max_channel][adapter->init_id] =
 813                        0xFF;
 814
 815                raid_dev->random_del_supported = 1;
 816        }
 817
 818        /*
 819         * find out the maximum number of scatter-gather elements supported by
 820         * this firmware
 821         */
 822        adapter->sglen = megaraid_mbox_get_max_sg(adapter);
 823
 824        // enumerate RAID and SCSI channels so that all devices on SCSI
 825        // channels can later be exported, including disk devices
 826        megaraid_mbox_enum_raid_scsi(adapter);
 827
 828        /*
 829         * Other parameters required by upper layer
 830         *
 831         * maximum number of sectors per IO command
 832         */
 833        adapter->max_sectors = megaraid_max_sectors;
 834
 835        /*
 836         * number of queued commands per LUN.
 837         */
 838        adapter->cmd_per_lun = megaraid_cmd_per_lun;
 839
 840        /*
 841         * Allocate resources required to issue FW calls, when sysfs is
 842         * accessed
 843         */
 844        if (megaraid_sysfs_alloc_resources(adapter) != 0)
 845                goto out_free_irq;
 846
 847        // Set the DMA mask to 64-bit. All supported controllers as capable of
 848        // DMA in this range
 849        pci_read_config_dword(adapter->pdev, PCI_CONF_AMISIG64, &magic64);
 850
 851        if (((magic64 == HBA_SIGNATURE_64_BIT) &&
 852                ((adapter->pdev->subsystem_device !=
 853                PCI_SUBSYS_ID_MEGARAID_SATA_150_6) &&
 854                (adapter->pdev->subsystem_device !=
 855                PCI_SUBSYS_ID_MEGARAID_SATA_150_4))) ||
 856                (adapter->pdev->vendor == PCI_VENDOR_ID_LSI_LOGIC &&
 857                adapter->pdev->device == PCI_DEVICE_ID_VERDE) ||
 858                (adapter->pdev->vendor == PCI_VENDOR_ID_LSI_LOGIC &&
 859                adapter->pdev->device == PCI_DEVICE_ID_DOBSON) ||
 860                (adapter->pdev->vendor == PCI_VENDOR_ID_LSI_LOGIC &&
 861                adapter->pdev->device == PCI_DEVICE_ID_LINDSAY) ||
 862                (adapter->pdev->vendor == PCI_VENDOR_ID_DELL &&
 863                adapter->pdev->device == PCI_DEVICE_ID_PERC4_DI_EVERGLADES) ||
 864                (adapter->pdev->vendor == PCI_VENDOR_ID_DELL &&
 865                adapter->pdev->device == PCI_DEVICE_ID_PERC4E_DI_KOBUK)) {
 866                if (dma_set_mask(&adapter->pdev->dev, DMA_BIT_MASK(64))) {
 867                        con_log(CL_ANN, (KERN_WARNING
 868                                "megaraid: DMA mask for 64-bit failed\n"));
 869
 870                        if (dma_set_mask(&adapter->pdev->dev,
 871                                                DMA_BIT_MASK(32))) {
 872                                con_log(CL_ANN, (KERN_WARNING
 873                                        "megaraid: 32-bit DMA mask failed\n"));
 874                                goto out_free_sysfs_res;
 875                        }
 876                }
 877        }
 878
 879        // setup tasklet for DPC
 880        tasklet_init(&adapter->dpc_h, megaraid_mbox_dpc,
 881                        (unsigned long)adapter);
 882
 883        con_log(CL_DLEVEL1, (KERN_INFO
 884                "megaraid mbox hba successfully initialized\n"));
 885
 886        return 0;
 887
 888out_free_sysfs_res:
 889        megaraid_sysfs_free_resources(adapter);
 890out_free_irq:
 891        free_irq(adapter->irq, adapter);
 892out_alloc_cmds:
 893        megaraid_free_cmd_packets(adapter);
 894out_iounmap:
 895        iounmap(raid_dev->baseaddr);
 896out_release_regions:
 897        pci_release_regions(pdev);
 898out_free_raid_dev:
 899        kfree(raid_dev);
 900
 901        return -1;
 902}
 903
 904
 905/**
 906 * megaraid_fini_mbox - undo controller initialization
 907 * @adapter             : our soft state
 908 */
 909static void
 910megaraid_fini_mbox(adapter_t *adapter)
 911{
 912        mraid_device_t *raid_dev = ADAP2RAIDDEV(adapter);
 913
 914        // flush all caches
 915        megaraid_mbox_flush_cache(adapter);
 916
 917        tasklet_kill(&adapter->dpc_h);
 918
 919        megaraid_sysfs_free_resources(adapter);
 920
 921        megaraid_free_cmd_packets(adapter);
 922
 923        free_irq(adapter->irq, adapter);
 924
 925        iounmap(raid_dev->baseaddr);
 926
 927        pci_release_regions(adapter->pdev);
 928
 929        kfree(raid_dev);
 930
 931        return;
 932}
 933
 934
 935/**
 936 * megaraid_alloc_cmd_packets - allocate shared mailbox
 937 * @adapter             : soft state of the raid controller
 938 *
 939 * Allocate and align the shared mailbox. This mailbox is used to issue
 940 * all the commands. For IO based controllers, the mailbox is also registered
 941 * with the FW. Allocate memory for all commands as well.
 942 * This is our big allocator.
 943 */
 944static int
 945megaraid_alloc_cmd_packets(adapter_t *adapter)
 946{
 947        mraid_device_t          *raid_dev = ADAP2RAIDDEV(adapter);
 948        struct pci_dev          *pdev;
 949        unsigned long           align;
 950        scb_t                   *scb;
 951        mbox_ccb_t              *ccb;
 952        struct mraid_pci_blk    *epthru_pci_blk;
 953        struct mraid_pci_blk    *sg_pci_blk;
 954        struct mraid_pci_blk    *mbox_pci_blk;
 955        int                     i;
 956
 957        pdev = adapter->pdev;
 958
 959        /*
 960         * Setup the mailbox
 961         * Allocate the common 16-byte aligned memory for the handshake
 962         * mailbox.
 963         */
 964        raid_dev->una_mbox64 = dma_alloc_coherent(&adapter->pdev->dev,
 965                                                  sizeof(mbox64_t),
 966                                                  &raid_dev->una_mbox64_dma,
 967                                                  GFP_KERNEL);
 968
 969        if (!raid_dev->una_mbox64) {
 970                con_log(CL_ANN, (KERN_WARNING
 971                        "megaraid: out of memory, %s %d\n", __func__,
 972                        __LINE__));
 973                return -1;
 974        }
 975
 976        /*
 977         * Align the mailbox at 16-byte boundary
 978         */
 979        raid_dev->mbox  = &raid_dev->una_mbox64->mbox32;
 980
 981        raid_dev->mbox  = (mbox_t *)((((unsigned long)raid_dev->mbox) + 15) &
 982                                (~0UL ^ 0xFUL));
 983
 984        raid_dev->mbox64 = (mbox64_t *)(((unsigned long)raid_dev->mbox) - 8);
 985
 986        align = ((void *)raid_dev->mbox -
 987                        ((void *)&raid_dev->una_mbox64->mbox32));
 988
 989        raid_dev->mbox_dma = (unsigned long)raid_dev->una_mbox64_dma + 8 +
 990                        align;
 991
 992        // Allocate memory for commands issued internally
 993        adapter->ibuf = dma_alloc_coherent(&pdev->dev, MBOX_IBUF_SIZE,
 994                                           &adapter->ibuf_dma_h, GFP_KERNEL);
 995        if (!adapter->ibuf) {
 996
 997                con_log(CL_ANN, (KERN_WARNING
 998                        "megaraid: out of memory, %s %d\n", __func__,
 999                        __LINE__));
1000
1001                goto out_free_common_mbox;
1002        }
1003
1004        // Allocate memory for our SCSI Command Blocks and their associated
1005        // memory
1006
1007        /*
1008         * Allocate memory for the base list of scb. Later allocate memory for
1009         * CCBs and embedded components of each CCB and point the pointers in
1010         * scb to the allocated components
1011         * NOTE: The code to allocate SCB will be duplicated in all the LLD
1012         * since the calling routine does not yet know the number of available
1013         * commands.
1014         */
1015        adapter->kscb_list = kcalloc(MBOX_MAX_SCSI_CMDS, sizeof(scb_t), GFP_KERNEL);
1016
1017        if (adapter->kscb_list == NULL) {
1018                con_log(CL_ANN, (KERN_WARNING
1019                        "megaraid: out of memory, %s %d\n", __func__,
1020                        __LINE__));
1021                goto out_free_ibuf;
1022        }
1023
1024        // memory allocation for our command packets
1025        if (megaraid_mbox_setup_dma_pools(adapter) != 0) {
1026                con_log(CL_ANN, (KERN_WARNING
1027                        "megaraid: out of memory, %s %d\n", __func__,
1028                        __LINE__));
1029                goto out_free_scb_list;
1030        }
1031
1032        // Adjust the scb pointers and link in the free pool
1033        epthru_pci_blk  = raid_dev->epthru_pool;
1034        sg_pci_blk      = raid_dev->sg_pool;
1035        mbox_pci_blk    = raid_dev->mbox_pool;
1036
1037        for (i = 0; i < MBOX_MAX_SCSI_CMDS; i++) {
1038                scb                     = adapter->kscb_list + i;
1039                ccb                     = raid_dev->ccb_list + i;
1040
1041                ccb->mbox       = (mbox_t *)(mbox_pci_blk[i].vaddr + 16);
1042                ccb->raw_mbox   = (uint8_t *)ccb->mbox;
1043                ccb->mbox64     = (mbox64_t *)(mbox_pci_blk[i].vaddr + 8);
1044                ccb->mbox_dma_h = (unsigned long)mbox_pci_blk[i].dma_addr + 16;
1045
1046                // make sure the mailbox is aligned properly
1047                if (ccb->mbox_dma_h & 0x0F) {
1048                        con_log(CL_ANN, (KERN_CRIT
1049                                "megaraid mbox: not aligned on 16-bytes\n"));
1050
1051                        goto out_teardown_dma_pools;
1052                }
1053
1054                ccb->epthru             = (mraid_epassthru_t *)
1055                                                epthru_pci_blk[i].vaddr;
1056                ccb->epthru_dma_h       = epthru_pci_blk[i].dma_addr;
1057                ccb->pthru              = (mraid_passthru_t *)ccb->epthru;
1058                ccb->pthru_dma_h        = ccb->epthru_dma_h;
1059
1060
1061                ccb->sgl64              = (mbox_sgl64 *)sg_pci_blk[i].vaddr;
1062                ccb->sgl_dma_h          = sg_pci_blk[i].dma_addr;
1063                ccb->sgl32              = (mbox_sgl32 *)ccb->sgl64;
1064
1065                scb->ccb                = (caddr_t)ccb;
1066                scb->gp                 = 0;
1067
1068                scb->sno                = i;    // command index
1069
1070                scb->scp                = NULL;
1071                scb->state              = SCB_FREE;
1072                scb->dma_direction      = DMA_NONE;
1073                scb->dma_type           = MRAID_DMA_NONE;
1074                scb->dev_channel        = -1;
1075                scb->dev_target         = -1;
1076
1077                // put scb in the free pool
1078                list_add_tail(&scb->list, &adapter->kscb_pool);
1079        }
1080
1081        return 0;
1082
1083out_teardown_dma_pools:
1084        megaraid_mbox_teardown_dma_pools(adapter);
1085out_free_scb_list:
1086        kfree(adapter->kscb_list);
1087out_free_ibuf:
1088        dma_free_coherent(&pdev->dev, MBOX_IBUF_SIZE, (void *)adapter->ibuf,
1089                adapter->ibuf_dma_h);
1090out_free_common_mbox:
1091        dma_free_coherent(&adapter->pdev->dev, sizeof(mbox64_t),
1092                (caddr_t)raid_dev->una_mbox64, raid_dev->una_mbox64_dma);
1093
1094        return -1;
1095}
1096
1097
1098/**
1099 * megaraid_free_cmd_packets - free memory
1100 * @adapter             : soft state of the raid controller
1101 *
1102 * Release memory resources allocated for commands.
1103 */
1104static void
1105megaraid_free_cmd_packets(adapter_t *adapter)
1106{
1107        mraid_device_t *raid_dev = ADAP2RAIDDEV(adapter);
1108
1109        megaraid_mbox_teardown_dma_pools(adapter);
1110
1111        kfree(adapter->kscb_list);
1112
1113        dma_free_coherent(&adapter->pdev->dev, MBOX_IBUF_SIZE,
1114                (void *)adapter->ibuf, adapter->ibuf_dma_h);
1115
1116        dma_free_coherent(&adapter->pdev->dev, sizeof(mbox64_t),
1117                (caddr_t)raid_dev->una_mbox64, raid_dev->una_mbox64_dma);
1118        return;
1119}
1120
1121
1122/**
1123 * megaraid_mbox_setup_dma_pools - setup dma pool for command packets
1124 * @adapter             : HBA soft state
1125 *
1126 * Setup the dma pools for mailbox, passthru and extended passthru structures,
1127 * and scatter-gather lists.
1128 */
1129static int
1130megaraid_mbox_setup_dma_pools(adapter_t *adapter)
1131{
1132        mraid_device_t          *raid_dev = ADAP2RAIDDEV(adapter);
1133        struct mraid_pci_blk    *epthru_pci_blk;
1134        struct mraid_pci_blk    *sg_pci_blk;
1135        struct mraid_pci_blk    *mbox_pci_blk;
1136        int                     i;
1137
1138
1139
1140        // Allocate memory for 16-bytes aligned mailboxes
1141        raid_dev->mbox_pool_handle = dma_pool_create("megaraid mbox pool",
1142                                                &adapter->pdev->dev,
1143                                                sizeof(mbox64_t) + 16,
1144                                                16, 0);
1145
1146        if (raid_dev->mbox_pool_handle == NULL) {
1147                goto fail_setup_dma_pool;
1148        }
1149
1150        mbox_pci_blk = raid_dev->mbox_pool;
1151        for (i = 0; i < MBOX_MAX_SCSI_CMDS; i++) {
1152                mbox_pci_blk[i].vaddr = dma_pool_alloc(
1153                                                raid_dev->mbox_pool_handle,
1154                                                GFP_KERNEL,
1155                                                &mbox_pci_blk[i].dma_addr);
1156                if (!mbox_pci_blk[i].vaddr) {
1157                        goto fail_setup_dma_pool;
1158                }
1159        }
1160
1161        /*
1162         * Allocate memory for each embedded passthru strucuture pointer
1163         * Request for a 128 bytes aligned structure for each passthru command
1164         * structure
1165         * Since passthru and extended passthru commands are exclusive, they
1166         * share common memory pool. Passthru structures piggyback on memory
1167         * allocated to extended passthru since passthru is smaller of the two
1168         */
1169        raid_dev->epthru_pool_handle = dma_pool_create("megaraid mbox pthru",
1170                        &adapter->pdev->dev, sizeof(mraid_epassthru_t), 128, 0);
1171
1172        if (raid_dev->epthru_pool_handle == NULL) {
1173                goto fail_setup_dma_pool;
1174        }
1175
1176        epthru_pci_blk = raid_dev->epthru_pool;
1177        for (i = 0; i < MBOX_MAX_SCSI_CMDS; i++) {
1178                epthru_pci_blk[i].vaddr = dma_pool_alloc(
1179                                                raid_dev->epthru_pool_handle,
1180                                                GFP_KERNEL,
1181                                                &epthru_pci_blk[i].dma_addr);
1182                if (!epthru_pci_blk[i].vaddr) {
1183                        goto fail_setup_dma_pool;
1184                }
1185        }
1186
1187
1188        // Allocate memory for each scatter-gather list. Request for 512 bytes
1189        // alignment for each sg list
1190        raid_dev->sg_pool_handle = dma_pool_create("megaraid mbox sg",
1191                                        &adapter->pdev->dev,
1192                                        sizeof(mbox_sgl64) * MBOX_MAX_SG_SIZE,
1193                                        512, 0);
1194
1195        if (raid_dev->sg_pool_handle == NULL) {
1196                goto fail_setup_dma_pool;
1197        }
1198
1199        sg_pci_blk = raid_dev->sg_pool;
1200        for (i = 0; i < MBOX_MAX_SCSI_CMDS; i++) {
1201                sg_pci_blk[i].vaddr = dma_pool_alloc(
1202                                                raid_dev->sg_pool_handle,
1203                                                GFP_KERNEL,
1204                                                &sg_pci_blk[i].dma_addr);
1205                if (!sg_pci_blk[i].vaddr) {
1206                        goto fail_setup_dma_pool;
1207                }
1208        }
1209
1210        return 0;
1211
1212fail_setup_dma_pool:
1213        megaraid_mbox_teardown_dma_pools(adapter);
1214        return -1;
1215}
1216
1217
1218/**
1219 * megaraid_mbox_teardown_dma_pools - teardown dma pools for command packets
1220 * @adapter             : HBA soft state
1221 *
1222 * Teardown the dma pool for mailbox, passthru and extended passthru
1223 * structures, and scatter-gather lists.
1224 */
1225static void
1226megaraid_mbox_teardown_dma_pools(adapter_t *adapter)
1227{
1228        mraid_device_t          *raid_dev = ADAP2RAIDDEV(adapter);
1229        struct mraid_pci_blk    *epthru_pci_blk;
1230        struct mraid_pci_blk    *sg_pci_blk;
1231        struct mraid_pci_blk    *mbox_pci_blk;
1232        int                     i;
1233
1234
1235        sg_pci_blk = raid_dev->sg_pool;
1236        for (i = 0; i < MBOX_MAX_SCSI_CMDS && sg_pci_blk[i].vaddr; i++) {
1237                dma_pool_free(raid_dev->sg_pool_handle, sg_pci_blk[i].vaddr,
1238                        sg_pci_blk[i].dma_addr);
1239        }
1240        dma_pool_destroy(raid_dev->sg_pool_handle);
1241
1242
1243        epthru_pci_blk = raid_dev->epthru_pool;
1244        for (i = 0; i < MBOX_MAX_SCSI_CMDS && epthru_pci_blk[i].vaddr; i++) {
1245                dma_pool_free(raid_dev->epthru_pool_handle,
1246                        epthru_pci_blk[i].vaddr, epthru_pci_blk[i].dma_addr);
1247        }
1248        dma_pool_destroy(raid_dev->epthru_pool_handle);
1249
1250
1251        mbox_pci_blk = raid_dev->mbox_pool;
1252        for (i = 0; i < MBOX_MAX_SCSI_CMDS && mbox_pci_blk[i].vaddr; i++) {
1253                dma_pool_free(raid_dev->mbox_pool_handle,
1254                        mbox_pci_blk[i].vaddr, mbox_pci_blk[i].dma_addr);
1255        }
1256        dma_pool_destroy(raid_dev->mbox_pool_handle);
1257
1258        return;
1259}
1260
1261
1262/**
1263 * megaraid_alloc_scb - detach and return a scb from the free list
1264 * @adapter     : controller's soft state
1265 * @scp         : pointer to the scsi command to be executed
1266 *
1267 * Return the scb from the head of the free list. %NULL if there are none
1268 * available.
1269 */
1270static scb_t *
1271megaraid_alloc_scb(adapter_t *adapter, struct scsi_cmnd *scp)
1272{
1273        struct list_head        *head = &adapter->kscb_pool;
1274        scb_t                   *scb = NULL;
1275        unsigned long           flags;
1276
1277        // detach scb from free pool
1278        spin_lock_irqsave(SCSI_FREE_LIST_LOCK(adapter), flags);
1279
1280        if (list_empty(head)) {
1281                spin_unlock_irqrestore(SCSI_FREE_LIST_LOCK(adapter), flags);
1282                return NULL;
1283        }
1284
1285        scb = list_entry(head->next, scb_t, list);
1286        list_del_init(&scb->list);
1287
1288        spin_unlock_irqrestore(SCSI_FREE_LIST_LOCK(adapter), flags);
1289
1290        scb->state      = SCB_ACTIVE;
1291        scb->scp        = scp;
1292        scb->dma_type   = MRAID_DMA_NONE;
1293
1294        return scb;
1295}
1296
1297
1298/**
1299 * megaraid_dealloc_scb - return the scb to the free pool
1300 * @adapter     : controller's soft state
1301 * @scb         : scb to be freed
1302 *
1303 * Return the scb back to the free list of scbs. The caller must 'flush' the
1304 * SCB before calling us. E.g., performing pci_unamp and/or pci_sync etc.
1305 * NOTE NOTE: Make sure the scb is not on any list before calling this
1306 * routine.
1307 */
1308static inline void
1309megaraid_dealloc_scb(adapter_t *adapter, scb_t *scb)
1310{
1311        unsigned long           flags;
1312
1313        // put scb in the free pool
1314        scb->state      = SCB_FREE;
1315        scb->scp        = NULL;
1316        spin_lock_irqsave(SCSI_FREE_LIST_LOCK(adapter), flags);
1317
1318        list_add(&scb->list, &adapter->kscb_pool);
1319
1320        spin_unlock_irqrestore(SCSI_FREE_LIST_LOCK(adapter), flags);
1321
1322        return;
1323}
1324
1325
1326/**
1327 * megaraid_mbox_mksgl - make the scatter-gather list
1328 * @adapter     : controller's soft state
1329 * @scb         : scsi control block
1330 *
1331 * Prepare the scatter-gather list.
1332 */
1333static int
1334megaraid_mbox_mksgl(adapter_t *adapter, scb_t *scb)
1335{
1336        struct scatterlist      *sgl;
1337        mbox_ccb_t              *ccb;
1338        struct scsi_cmnd        *scp;
1339        int                     sgcnt;
1340        int                     i;
1341
1342
1343        scp     = scb->scp;
1344        ccb     = (mbox_ccb_t *)scb->ccb;
1345
1346        sgcnt = scsi_dma_map(scp);
1347        BUG_ON(sgcnt < 0 || sgcnt > adapter->sglen);
1348
1349        // no mapping required if no data to be transferred
1350        if (!sgcnt)
1351                return 0;
1352
1353        scb->dma_type = MRAID_DMA_WSG;
1354
1355        scsi_for_each_sg(scp, sgl, sgcnt, i) {
1356                ccb->sgl64[i].address   = sg_dma_address(sgl);
1357                ccb->sgl64[i].length    = sg_dma_len(sgl);
1358        }
1359
1360        // Return count of SG nodes
1361        return sgcnt;
1362}
1363
1364
1365/**
1366 * mbox_post_cmd - issue a mailbox command
1367 * @adapter     : controller's soft state
1368 * @scb         : command to be issued
1369 *
1370 * Post the command to the controller if mailbox is available.
1371 */
1372static int
1373mbox_post_cmd(adapter_t *adapter, scb_t *scb)
1374{
1375        mraid_device_t  *raid_dev = ADAP2RAIDDEV(adapter);
1376        mbox64_t        *mbox64;
1377        mbox_t          *mbox;
1378        mbox_ccb_t      *ccb;
1379        unsigned long   flags;
1380        unsigned int    i = 0;
1381
1382
1383        ccb     = (mbox_ccb_t *)scb->ccb;
1384        mbox    = raid_dev->mbox;
1385        mbox64  = raid_dev->mbox64;
1386
1387        /*
1388         * Check for busy mailbox. If it is, return failure - the caller
1389         * should retry later.
1390         */
1391        spin_lock_irqsave(MAILBOX_LOCK(raid_dev), flags);
1392
1393        if (unlikely(mbox->busy)) {
1394                do {
1395                        udelay(1);
1396                        i++;
1397                        rmb();
1398                } while(mbox->busy && (i < max_mbox_busy_wait));
1399
1400                if (mbox->busy) {
1401
1402                        spin_unlock_irqrestore(MAILBOX_LOCK(raid_dev), flags);
1403
1404                        return -1;
1405                }
1406        }
1407
1408
1409        // Copy this command's mailbox data into "adapter's" mailbox
1410        memcpy((caddr_t)mbox64, (caddr_t)ccb->mbox64, 22);
1411        mbox->cmdid = scb->sno;
1412
1413        adapter->outstanding_cmds++;
1414
1415        mbox->busy      = 1;    // Set busy
1416        mbox->poll      = 0;
1417        mbox->ack       = 0;
1418        wmb();
1419
1420        WRINDOOR(raid_dev, raid_dev->mbox_dma | 0x1);
1421
1422        spin_unlock_irqrestore(MAILBOX_LOCK(raid_dev), flags);
1423
1424        return 0;
1425}
1426
1427
1428/**
1429 * megaraid_queue_command_lck - generic queue entry point for all LLDs
1430 * @scp         : pointer to the scsi command to be executed
1431 * @done        : callback routine to be called after the cmd has be completed
1432 *
1433 * Queue entry point for mailbox based controllers.
1434 */
1435static int
1436megaraid_queue_command_lck(struct scsi_cmnd *scp, void (*done)(struct scsi_cmnd *))
1437{
1438        adapter_t       *adapter;
1439        scb_t           *scb;
1440        int             if_busy;
1441
1442        adapter         = SCP2ADAPTER(scp);
1443        scp->scsi_done  = done;
1444        scp->result     = 0;
1445
1446        /*
1447         * Allocate and build a SCB request
1448         * if_busy flag will be set if megaraid_mbox_build_cmd() command could
1449         * not allocate scb. We will return non-zero status in that case.
1450         * NOTE: scb can be null even though certain commands completed
1451         * successfully, e.g., MODE_SENSE and TEST_UNIT_READY, it would
1452         * return 0 in that case, and we would do the callback right away.
1453         */
1454        if_busy = 0;
1455        scb = megaraid_mbox_build_cmd(adapter, scp, &if_busy);
1456        if (!scb) {     // command already completed
1457                done(scp);
1458                return 0;
1459        }
1460
1461        megaraid_mbox_runpendq(adapter, scb);
1462        return if_busy;
1463}
1464
1465static DEF_SCSI_QCMD(megaraid_queue_command)
1466
1467/**
1468 * megaraid_mbox_build_cmd - transform the mid-layer scsi commands
1469 * @adapter     : controller's soft state
1470 * @scp         : mid-layer scsi command pointer
1471 * @busy        : set if request could not be completed because of lack of
1472 *              resources
1473 *
1474 * Transform the mid-layer scsi command to megaraid firmware lingua.
1475 * Convert the command issued by mid-layer to format understood by megaraid
1476 * firmware. We also complete certain commands without sending them to firmware.
1477 */
1478static scb_t *
1479megaraid_mbox_build_cmd(adapter_t *adapter, struct scsi_cmnd *scp, int *busy)
1480{
1481        mraid_device_t          *rdev = ADAP2RAIDDEV(adapter);
1482        int                     channel;
1483        int                     target;
1484        int                     islogical;
1485        mbox_ccb_t              *ccb;
1486        mraid_passthru_t        *pthru;
1487        mbox64_t                *mbox64;
1488        mbox_t                  *mbox;
1489        scb_t                   *scb;
1490        char                    skip[] = "skipping";
1491        char                    scan[] = "scanning";
1492        char                    *ss;
1493
1494
1495        /*
1496         * Get the appropriate device map for the device this command is
1497         * intended for
1498         */
1499        MRAID_GET_DEVICE_MAP(adapter, scp, channel, target, islogical);
1500
1501        /*
1502         * Logical drive commands
1503         */
1504        if (islogical) {
1505                switch (scp->cmnd[0]) {
1506                case TEST_UNIT_READY:
1507                        /*
1508                         * Do we support clustering and is the support enabled
1509                         * If no, return success always
1510                         */
1511                        if (!adapter->ha) {
1512                                scp->result = (DID_OK << 16);
1513                                return NULL;
1514                        }
1515
1516                        if (!(scb = megaraid_alloc_scb(adapter, scp))) {
1517                                scp->result = (DID_ERROR << 16);
1518                                *busy = 1;
1519                                return NULL;
1520                        }
1521
1522                        scb->dma_direction      = scp->sc_data_direction;
1523                        scb->dev_channel        = 0xFF;
1524                        scb->dev_target         = target;
1525                        ccb                     = (mbox_ccb_t *)scb->ccb;
1526
1527                        /*
1528                         * The command id will be provided by the command
1529                         * issuance routine
1530                         */
1531                        ccb->raw_mbox[0]        = CLUSTER_CMD;
1532                        ccb->raw_mbox[2]        = RESERVATION_STATUS;
1533                        ccb->raw_mbox[3]        = target;
1534
1535                        return scb;
1536
1537                case MODE_SENSE:
1538                {
1539                        struct scatterlist      *sgl;
1540                        caddr_t                 vaddr;
1541
1542                        sgl = scsi_sglist(scp);
1543                        if (sg_page(sgl)) {
1544                                vaddr = (caddr_t) sg_virt(&sgl[0]);
1545
1546                                memset(vaddr, 0, scp->cmnd[4]);
1547                        }
1548                        else {
1549                                con_log(CL_ANN, (KERN_WARNING
1550                                                 "megaraid mailbox: invalid sg:%d\n",
1551                                                 __LINE__));
1552                        }
1553                }
1554                scp->result = (DID_OK << 16);
1555                return NULL;
1556
1557                case INQUIRY:
1558                        /*
1559                         * Display the channel scan for logical drives
1560                         * Do not display scan for a channel if already done.
1561                         */
1562                        if (!(rdev->last_disp & (1L << SCP2CHANNEL(scp)))) {
1563
1564                                con_log(CL_ANN, (KERN_INFO
1565                                        "scsi[%d]: scanning scsi channel %d",
1566                                        adapter->host->host_no,
1567                                        SCP2CHANNEL(scp)));
1568
1569                                con_log(CL_ANN, (
1570                                        " [virtual] for logical drives\n"));
1571
1572                                rdev->last_disp |= (1L << SCP2CHANNEL(scp));
1573                        }
1574
1575                        if (scp->cmnd[1] & MEGA_SCSI_INQ_EVPD) {
1576                                scsi_build_sense(scp, 0, ILLEGAL_REQUEST,
1577                                                 MEGA_INVALID_FIELD_IN_CDB, 0);
1578                                return NULL;
1579                        }
1580
1581                        fallthrough;
1582
1583                case READ_CAPACITY:
1584                        /*
1585                         * Do not allow LUN > 0 for logical drives and
1586                         * requests for more than 40 logical drives
1587                         */
1588                        if (SCP2LUN(scp)) {
1589                                scp->result = (DID_BAD_TARGET << 16);
1590                                return NULL;
1591                        }
1592                        if ((target % 0x80) >= MAX_LOGICAL_DRIVES_40LD) {
1593                                scp->result = (DID_BAD_TARGET << 16);
1594                                return NULL;
1595                        }
1596
1597
1598                        /* Allocate a SCB and initialize passthru */
1599                        if (!(scb = megaraid_alloc_scb(adapter, scp))) {
1600                                scp->result = (DID_ERROR << 16);
1601                                *busy = 1;
1602                                return NULL;
1603                        }
1604
1605                        ccb                     = (mbox_ccb_t *)scb->ccb;
1606                        scb->dev_channel        = 0xFF;
1607                        scb->dev_target         = target;
1608                        pthru                   = ccb->pthru;
1609                        mbox                    = ccb->mbox;
1610                        mbox64                  = ccb->mbox64;
1611
1612                        pthru->timeout          = 0;
1613                        pthru->ars              = 1;
1614                        pthru->reqsenselen      = 14;
1615                        pthru->islogical        = 1;
1616                        pthru->logdrv           = target;
1617                        pthru->cdblen           = scp->cmd_len;
1618                        memcpy(pthru->cdb, scp->cmnd, scp->cmd_len);
1619
1620                        mbox->cmd               = MBOXCMD_PASSTHRU64;
1621                        scb->dma_direction      = scp->sc_data_direction;
1622
1623                        pthru->dataxferlen      = scsi_bufflen(scp);
1624                        pthru->dataxferaddr     = ccb->sgl_dma_h;
1625                        pthru->numsge           = megaraid_mbox_mksgl(adapter,
1626                                                        scb);
1627
1628                        mbox->xferaddr          = 0xFFFFFFFF;
1629                        mbox64->xferaddr_lo     = (uint32_t )ccb->pthru_dma_h;
1630                        mbox64->xferaddr_hi     = 0;
1631
1632                        return scb;
1633
1634                case READ_6:
1635                case WRITE_6:
1636                case READ_10:
1637                case WRITE_10:
1638                case READ_12:
1639                case WRITE_12:
1640
1641                        /*
1642                         * Allocate a SCB and initialize mailbox
1643                         */
1644                        if (!(scb = megaraid_alloc_scb(adapter, scp))) {
1645                                scp->result = (DID_ERROR << 16);
1646                                *busy = 1;
1647                                return NULL;
1648                        }
1649                        ccb                     = (mbox_ccb_t *)scb->ccb;
1650                        scb->dev_channel        = 0xFF;
1651                        scb->dev_target         = target;
1652                        mbox                    = ccb->mbox;
1653                        mbox64                  = ccb->mbox64;
1654                        mbox->logdrv            = target;
1655
1656                        /*
1657                         * A little HACK: 2nd bit is zero for all scsi read
1658                         * commands and is set for all scsi write commands
1659                         */
1660                        mbox->cmd = (scp->cmnd[0] & 0x02) ?  MBOXCMD_LWRITE64:
1661                                        MBOXCMD_LREAD64 ;
1662
1663                        /*
1664                         * 6-byte READ(0x08) or WRITE(0x0A) cdb
1665                         */
1666                        if (scp->cmd_len == 6) {
1667                                mbox->numsectors = (uint32_t)scp->cmnd[4];
1668                                mbox->lba =
1669                                        ((uint32_t)scp->cmnd[1] << 16)  |
1670                                        ((uint32_t)scp->cmnd[2] << 8)   |
1671                                        (uint32_t)scp->cmnd[3];
1672
1673                                mbox->lba &= 0x1FFFFF;
1674                        }
1675
1676                        /*
1677                         * 10-byte READ(0x28) or WRITE(0x2A) cdb
1678                         */
1679                        else if (scp->cmd_len == 10) {
1680                                mbox->numsectors =
1681                                        (uint32_t)scp->cmnd[8] |
1682                                        ((uint32_t)scp->cmnd[7] << 8);
1683                                mbox->lba =
1684                                        ((uint32_t)scp->cmnd[2] << 24) |
1685                                        ((uint32_t)scp->cmnd[3] << 16) |
1686                                        ((uint32_t)scp->cmnd[4] << 8) |
1687                                        (uint32_t)scp->cmnd[5];
1688                        }
1689
1690                        /*
1691                         * 12-byte READ(0xA8) or WRITE(0xAA) cdb
1692                         */
1693                        else if (scp->cmd_len == 12) {
1694                                mbox->lba =
1695                                        ((uint32_t)scp->cmnd[2] << 24) |
1696                                        ((uint32_t)scp->cmnd[3] << 16) |
1697                                        ((uint32_t)scp->cmnd[4] << 8) |
1698                                        (uint32_t)scp->cmnd[5];
1699
1700                                mbox->numsectors =
1701                                        ((uint32_t)scp->cmnd[6] << 24) |
1702                                        ((uint32_t)scp->cmnd[7] << 16) |
1703                                        ((uint32_t)scp->cmnd[8] << 8) |
1704                                        (uint32_t)scp->cmnd[9];
1705                        }
1706                        else {
1707                                con_log(CL_ANN, (KERN_WARNING
1708                                        "megaraid: unsupported CDB length\n"));
1709
1710                                megaraid_dealloc_scb(adapter, scb);
1711
1712                                scp->result = (DID_ERROR << 16);
1713                                return NULL;
1714                        }
1715
1716                        scb->dma_direction = scp->sc_data_direction;
1717
1718                        // Calculate Scatter-Gather info
1719                        mbox64->xferaddr_lo     = (uint32_t )ccb->sgl_dma_h;
1720                        mbox->numsge            = megaraid_mbox_mksgl(adapter,
1721                                                        scb);
1722                        mbox->xferaddr          = 0xFFFFFFFF;
1723                        mbox64->xferaddr_hi     = 0;
1724
1725                        return scb;
1726
1727                case RESERVE:
1728                case RELEASE:
1729                        /*
1730                         * Do we support clustering and is the support enabled
1731                         */
1732                        if (!adapter->ha) {
1733                                scp->result = (DID_BAD_TARGET << 16);
1734                                return NULL;
1735                        }
1736
1737                        /*
1738                         * Allocate a SCB and initialize mailbox
1739                         */
1740                        if (!(scb = megaraid_alloc_scb(adapter, scp))) {
1741                                scp->result = (DID_ERROR << 16);
1742                                *busy = 1;
1743                                return NULL;
1744                        }
1745
1746                        ccb                     = (mbox_ccb_t *)scb->ccb;
1747                        scb->dev_channel        = 0xFF;
1748                        scb->dev_target         = target;
1749                        ccb->raw_mbox[0]        = CLUSTER_CMD;
1750                        ccb->raw_mbox[2]        =  (scp->cmnd[0] == RESERVE) ?
1751                                                RESERVE_LD : RELEASE_LD;
1752
1753                        ccb->raw_mbox[3]        = target;
1754                        scb->dma_direction      = scp->sc_data_direction;
1755
1756                        return scb;
1757
1758                default:
1759                        scp->result = (DID_BAD_TARGET << 16);
1760                        return NULL;
1761                }
1762        }
1763        else { // Passthru device commands
1764
1765                // Do not allow access to target id > 15 or LUN > 7
1766                if (target > 15 || SCP2LUN(scp) > 7) {
1767                        scp->result = (DID_BAD_TARGET << 16);
1768                        return NULL;
1769                }
1770
1771                // if fast load option was set and scan for last device is
1772                // over, reset the fast_load flag so that during a possible
1773                // next scan, devices can be made available
1774                if (rdev->fast_load && (target == 15) &&
1775                        (SCP2CHANNEL(scp) == adapter->max_channel -1)) {
1776
1777                        con_log(CL_ANN, (KERN_INFO
1778                        "megaraid[%d]: physical device scan re-enabled\n",
1779                                adapter->host->host_no));
1780                        rdev->fast_load = 0;
1781                }
1782
1783                /*
1784                 * Display the channel scan for physical devices
1785                 */
1786                if (!(rdev->last_disp & (1L << SCP2CHANNEL(scp)))) {
1787
1788                        ss = rdev->fast_load ? skip : scan;
1789
1790                        con_log(CL_ANN, (KERN_INFO
1791                                "scsi[%d]: %s scsi channel %d [Phy %d]",
1792                                adapter->host->host_no, ss, SCP2CHANNEL(scp),
1793                                channel));
1794
1795                        con_log(CL_ANN, (
1796                                " for non-raid devices\n"));
1797
1798                        rdev->last_disp |= (1L << SCP2CHANNEL(scp));
1799                }
1800
1801                // disable channel sweep if fast load option given
1802                if (rdev->fast_load) {
1803                        scp->result = (DID_BAD_TARGET << 16);
1804                        return NULL;
1805                }
1806
1807                // Allocate a SCB and initialize passthru
1808                if (!(scb = megaraid_alloc_scb(adapter, scp))) {
1809                        scp->result = (DID_ERROR << 16);
1810                        *busy = 1;
1811                        return NULL;
1812                }
1813
1814                ccb                     = (mbox_ccb_t *)scb->ccb;
1815                scb->dev_channel        = channel;
1816                scb->dev_target         = target;
1817                scb->dma_direction      = scp->sc_data_direction;
1818                mbox                    = ccb->mbox;
1819                mbox64                  = ccb->mbox64;
1820
1821                // Does this firmware support extended CDBs
1822                if (adapter->max_cdb_sz == 16) {
1823                        mbox->cmd               = MBOXCMD_EXTPTHRU;
1824
1825                        megaraid_mbox_prepare_epthru(adapter, scb, scp);
1826
1827                        mbox64->xferaddr_lo     = (uint32_t)ccb->epthru_dma_h;
1828                        mbox64->xferaddr_hi     = 0;
1829                        mbox->xferaddr          = 0xFFFFFFFF;
1830                }
1831                else {
1832                        mbox->cmd = MBOXCMD_PASSTHRU64;
1833
1834                        megaraid_mbox_prepare_pthru(adapter, scb, scp);
1835
1836                        mbox64->xferaddr_lo     = (uint32_t)ccb->pthru_dma_h;
1837                        mbox64->xferaddr_hi     = 0;
1838                        mbox->xferaddr          = 0xFFFFFFFF;
1839                }
1840                return scb;
1841        }
1842
1843        // NOT REACHED
1844}
1845
1846
1847/**
1848 * megaraid_mbox_runpendq - execute commands queued in the pending queue
1849 * @adapter     : controller's soft state
1850 * @scb_q       : SCB to be queued in the pending list
1851 *
1852 * Scan the pending list for commands which are not yet issued and try to
1853 * post to the controller. The SCB can be a null pointer, which would indicate
1854 * no SCB to be queue, just try to execute the ones in the pending list.
1855 *
1856 * NOTE: We do not actually traverse the pending list. The SCBs are plucked
1857 * out from the head of the pending list. If it is successfully issued, the
1858 * next SCB is at the head now.
1859 */
1860static void
1861megaraid_mbox_runpendq(adapter_t *adapter, scb_t *scb_q)
1862{
1863        scb_t                   *scb;
1864        unsigned long           flags;
1865
1866        spin_lock_irqsave(PENDING_LIST_LOCK(adapter), flags);
1867
1868        if (scb_q) {
1869                scb_q->state = SCB_PENDQ;
1870                list_add_tail(&scb_q->list, &adapter->pend_list);
1871        }
1872
1873        // if the adapter in not in quiescent mode, post the commands to FW
1874        if (adapter->quiescent) {
1875                spin_unlock_irqrestore(PENDING_LIST_LOCK(adapter), flags);
1876                return;
1877        }
1878
1879        while (!list_empty(&adapter->pend_list)) {
1880
1881                assert_spin_locked(PENDING_LIST_LOCK(adapter));
1882
1883                scb = list_entry(adapter->pend_list.next, scb_t, list);
1884
1885                // remove the scb from the pending list and try to
1886                // issue. If we are unable to issue it, put back in
1887                // the pending list and return
1888
1889                list_del_init(&scb->list);
1890
1891                spin_unlock_irqrestore(PENDING_LIST_LOCK(adapter), flags);
1892
1893                // if mailbox was busy, return SCB back to pending
1894                // list. Make sure to add at the head, since that's
1895                // where it would have been removed from
1896
1897                scb->state = SCB_ISSUED;
1898
1899                if (mbox_post_cmd(adapter, scb) != 0) {
1900
1901                        spin_lock_irqsave(PENDING_LIST_LOCK(adapter), flags);
1902
1903                        scb->state = SCB_PENDQ;
1904
1905                        list_add(&scb->list, &adapter->pend_list);
1906
1907                        spin_unlock_irqrestore(PENDING_LIST_LOCK(adapter),
1908                                flags);
1909
1910                        return;
1911                }
1912
1913                spin_lock_irqsave(PENDING_LIST_LOCK(adapter), flags);
1914        }
1915
1916        spin_unlock_irqrestore(PENDING_LIST_LOCK(adapter), flags);
1917
1918
1919        return;
1920}
1921
1922
1923/**
1924 * megaraid_mbox_prepare_pthru - prepare a command for physical devices
1925 * @adapter     : pointer to controller's soft state
1926 * @scb         : scsi control block
1927 * @scp         : scsi command from the mid-layer
1928 *
1929 * Prepare a command for the scsi physical devices.
1930 */
1931static void
1932megaraid_mbox_prepare_pthru(adapter_t *adapter, scb_t *scb,
1933                struct scsi_cmnd *scp)
1934{
1935        mbox_ccb_t              *ccb;
1936        mraid_passthru_t        *pthru;
1937        uint8_t                 channel;
1938        uint8_t                 target;
1939
1940        ccb     = (mbox_ccb_t *)scb->ccb;
1941        pthru   = ccb->pthru;
1942        channel = scb->dev_channel;
1943        target  = scb->dev_target;
1944
1945        // 0=6sec, 1=60sec, 2=10min, 3=3hrs, 4=NO timeout
1946        pthru->timeout          = 4;    
1947        pthru->ars              = 1;
1948        pthru->islogical        = 0;
1949        pthru->channel          = 0;
1950        pthru->target           = (channel << 4) | target;
1951        pthru->logdrv           = SCP2LUN(scp);
1952        pthru->reqsenselen      = 14;
1953        pthru->cdblen           = scp->cmd_len;
1954
1955        memcpy(pthru->cdb, scp->cmnd, scp->cmd_len);
1956
1957        if (scsi_bufflen(scp)) {
1958                pthru->dataxferlen      = scsi_bufflen(scp);
1959                pthru->dataxferaddr     = ccb->sgl_dma_h;
1960                pthru->numsge           = megaraid_mbox_mksgl(adapter, scb);
1961        }
1962        else {
1963                pthru->dataxferaddr     = 0;
1964                pthru->dataxferlen      = 0;
1965                pthru->numsge           = 0;
1966        }
1967        return;
1968}
1969
1970
1971/**
1972 * megaraid_mbox_prepare_epthru - prepare a command for physical devices
1973 * @adapter     : pointer to controller's soft state
1974 * @scb         : scsi control block
1975 * @scp         : scsi command from the mid-layer
1976 *
1977 * Prepare a command for the scsi physical devices. This routine prepares
1978 * commands for devices which can take extended CDBs (>10 bytes).
1979 */
1980static void
1981megaraid_mbox_prepare_epthru(adapter_t *adapter, scb_t *scb,
1982                struct scsi_cmnd *scp)
1983{
1984        mbox_ccb_t              *ccb;
1985        mraid_epassthru_t       *epthru;
1986        uint8_t                 channel;
1987        uint8_t                 target;
1988
1989        ccb     = (mbox_ccb_t *)scb->ccb;
1990        epthru  = ccb->epthru;
1991        channel = scb->dev_channel;
1992        target  = scb->dev_target;
1993
1994        // 0=6sec, 1=60sec, 2=10min, 3=3hrs, 4=NO timeout
1995        epthru->timeout         = 4;    
1996        epthru->ars             = 1;
1997        epthru->islogical       = 0;
1998        epthru->channel         = 0;
1999        epthru->target          = (channel << 4) | target;
2000        epthru->logdrv          = SCP2LUN(scp);
2001        epthru->reqsenselen     = 14;
2002        epthru->cdblen          = scp->cmd_len;
2003
2004        memcpy(epthru->cdb, scp->cmnd, scp->cmd_len);
2005
2006        if (scsi_bufflen(scp)) {
2007                epthru->dataxferlen     = scsi_bufflen(scp);
2008                epthru->dataxferaddr    = ccb->sgl_dma_h;
2009                epthru->numsge          = megaraid_mbox_mksgl(adapter, scb);
2010        }
2011        else {
2012                epthru->dataxferaddr    = 0;
2013                epthru->dataxferlen     = 0;
2014                epthru->numsge          = 0;
2015        }
2016        return;
2017}
2018
2019
2020/**
2021 * megaraid_ack_sequence - interrupt ack sequence for memory mapped HBAs
2022 * @adapter     : controller's soft state
2023 *
2024 * Interrupt acknowledgement sequence for memory mapped HBAs. Find out the
2025 * completed command and put them on the completed list for later processing.
2026 *
2027 * Returns:     1 if the interrupt is valid, 0 otherwise
2028 */
2029static int
2030megaraid_ack_sequence(adapter_t *adapter)
2031{
2032        mraid_device_t          *raid_dev = ADAP2RAIDDEV(adapter);
2033        mbox_t                  *mbox;
2034        scb_t                   *scb;
2035        uint8_t                 nstatus;
2036        uint8_t                 completed[MBOX_MAX_FIRMWARE_STATUS];
2037        struct list_head        clist;
2038        int                     handled;
2039        uint32_t                dword;
2040        unsigned long           flags;
2041        int                     i, j;
2042
2043
2044        mbox    = raid_dev->mbox;
2045
2046        // move the SCBs from the firmware completed array to our local list
2047        INIT_LIST_HEAD(&clist);
2048
2049        // loop till F/W has more commands for us to complete
2050        handled = 0;
2051        spin_lock_irqsave(MAILBOX_LOCK(raid_dev), flags);
2052        do {
2053                /*
2054                 * Check if a valid interrupt is pending. If found, force the
2055                 * interrupt line low.
2056                 */
2057                dword = RDOUTDOOR(raid_dev);
2058                if (dword != 0x10001234) break;
2059
2060                handled = 1;
2061
2062                WROUTDOOR(raid_dev, 0x10001234);
2063
2064                nstatus = 0;
2065                // wait for valid numstatus to post
2066                for (i = 0; i < 0xFFFFF; i++) {
2067                        if (mbox->numstatus != 0xFF) {
2068                                nstatus = mbox->numstatus;
2069                                break;
2070                        }
2071                        rmb();
2072                }
2073                mbox->numstatus = 0xFF;
2074
2075                adapter->outstanding_cmds -= nstatus;
2076
2077                for (i = 0; i < nstatus; i++) {
2078
2079                        // wait for valid command index to post
2080                        for (j = 0; j < 0xFFFFF; j++) {
2081                                if (mbox->completed[i] != 0xFF) break;
2082                                rmb();
2083                        }
2084                        completed[i]            = mbox->completed[i];
2085                        mbox->completed[i]      = 0xFF;
2086
2087                        if (completed[i] == 0xFF) {
2088                                con_log(CL_ANN, (KERN_CRIT
2089                                "megaraid: command posting timed out\n"));
2090
2091                                BUG();
2092                                continue;
2093                        }
2094
2095                        // Get SCB associated with this command id
2096                        if (completed[i] >= MBOX_MAX_SCSI_CMDS) {
2097                                // a cmm command
2098                                scb = adapter->uscb_list + (completed[i] -
2099                                                MBOX_MAX_SCSI_CMDS);
2100                        }
2101                        else {
2102                                // an os command
2103                                scb = adapter->kscb_list + completed[i];
2104                        }
2105
2106                        scb->status = mbox->status;
2107                        list_add_tail(&scb->list, &clist);
2108                }
2109
2110                // Acknowledge interrupt
2111                WRINDOOR(raid_dev, 0x02);
2112
2113        } while(1);
2114
2115        spin_unlock_irqrestore(MAILBOX_LOCK(raid_dev), flags);
2116
2117
2118        // put the completed commands in the completed list. DPC would
2119        // complete these commands later
2120        spin_lock_irqsave(COMPLETED_LIST_LOCK(adapter), flags);
2121
2122        list_splice(&clist, &adapter->completed_list);
2123
2124        spin_unlock_irqrestore(COMPLETED_LIST_LOCK(adapter), flags);
2125
2126
2127        // schedule the DPC if there is some work for it
2128        if (handled)
2129                tasklet_schedule(&adapter->dpc_h);
2130
2131        return handled;
2132}
2133
2134
2135/**
2136 * megaraid_isr - isr for memory based mailbox based controllers
2137 * @irq         : irq
2138 * @devp        : pointer to our soft state
2139 *
2140 * Interrupt service routine for memory-mapped mailbox controllers.
2141 */
2142static irqreturn_t
2143megaraid_isr(int irq, void *devp)
2144{
2145        adapter_t       *adapter = devp;
2146        int             handled;
2147
2148        handled = megaraid_ack_sequence(adapter);
2149
2150        /* Loop through any pending requests */
2151        if (!adapter->quiescent) {
2152                megaraid_mbox_runpendq(adapter, NULL);
2153        }
2154
2155        return IRQ_RETVAL(handled);
2156}
2157
2158
2159/**
2160 * megaraid_mbox_dpc - the tasklet to complete the commands from completed list
2161 * @devp        : pointer to HBA soft state
2162 *
2163 * Pick up the commands from the completed list and send back to the owners.
2164 * This is a reentrant function and does not assume any locks are held while
2165 * it is being called.
2166 */
2167static void
2168megaraid_mbox_dpc(unsigned long devp)
2169{
2170        adapter_t               *adapter = (adapter_t *)devp;
2171        mraid_device_t          *raid_dev;
2172        struct list_head        clist;
2173        struct scatterlist      *sgl;
2174        scb_t                   *scb;
2175        scb_t                   *tmp;
2176        struct scsi_cmnd        *scp;
2177        mraid_passthru_t        *pthru;
2178        mraid_epassthru_t       *epthru;
2179        mbox_ccb_t              *ccb;
2180        int                     islogical;
2181        int                     pdev_index;
2182        int                     pdev_state;
2183        mbox_t                  *mbox;
2184        unsigned long           flags;
2185        uint8_t                 c;
2186        int                     status;
2187        uioc_t                  *kioc;
2188
2189
2190        if (!adapter) return;
2191
2192        raid_dev = ADAP2RAIDDEV(adapter);
2193
2194        // move the SCBs from the completed list to our local list
2195        INIT_LIST_HEAD(&clist);
2196
2197        spin_lock_irqsave(COMPLETED_LIST_LOCK(adapter), flags);
2198
2199        list_splice_init(&adapter->completed_list, &clist);
2200
2201        spin_unlock_irqrestore(COMPLETED_LIST_LOCK(adapter), flags);
2202
2203
2204        list_for_each_entry_safe(scb, tmp, &clist, list) {
2205
2206                status          = scb->status;
2207                scp             = scb->scp;
2208                ccb             = (mbox_ccb_t *)scb->ccb;
2209                pthru           = ccb->pthru;
2210                epthru          = ccb->epthru;
2211                mbox            = ccb->mbox;
2212
2213                // Make sure f/w has completed a valid command
2214                if (scb->state != SCB_ISSUED) {
2215                        con_log(CL_ANN, (KERN_CRIT
2216                        "megaraid critical err: invalid command %d:%d:%p\n",
2217                                scb->sno, scb->state, scp));
2218                        BUG();
2219                        continue;       // Must never happen!
2220                }
2221
2222                // check for the management command and complete it right away
2223                if (scb->sno >= MBOX_MAX_SCSI_CMDS) {
2224                        scb->state      = SCB_FREE;
2225                        scb->status     = status;
2226
2227                        // remove from local clist
2228                        list_del_init(&scb->list);
2229
2230                        kioc                    = (uioc_t *)scb->gp;
2231                        kioc->status            = 0;
2232
2233                        megaraid_mbox_mm_done(adapter, scb);
2234
2235                        continue;
2236                }
2237
2238                // Was an abort issued for this command earlier
2239                if (scb->state & SCB_ABORT) {
2240                        con_log(CL_ANN, (KERN_NOTICE
2241                        "megaraid: aborted cmd [%x] completed\n",
2242                                scb->sno));
2243                }
2244
2245                /*
2246                 * If the inquiry came of a disk drive which is not part of
2247                 * any RAID array, expose it to the kernel. For this to be
2248                 * enabled, user must set the "megaraid_expose_unconf_disks"
2249                 * flag to 1 by specifying it on module parameter list.
2250                 * This would enable data migration off drives from other
2251                 * configurations.
2252                 */
2253                islogical = MRAID_IS_LOGICAL(adapter, scp);
2254                if (scp->cmnd[0] == INQUIRY && status == 0 && islogical == 0
2255                                && IS_RAID_CH(raid_dev, scb->dev_channel)) {
2256
2257                        sgl = scsi_sglist(scp);
2258                        if (sg_page(sgl)) {
2259                                c = *(unsigned char *) sg_virt(&sgl[0]);
2260                        } else {
2261                                con_log(CL_ANN, (KERN_WARNING
2262                                                 "megaraid mailbox: invalid sg:%d\n",
2263                                                 __LINE__));
2264                                c = 0;
2265                        }
2266
2267                        if ((c & 0x1F ) == TYPE_DISK) {
2268                                pdev_index = (scb->dev_channel * 16) +
2269                                        scb->dev_target;
2270                                pdev_state =
2271                                        raid_dev->pdrv_state[pdev_index] & 0x0F;
2272
2273                                if (pdev_state == PDRV_ONLINE           ||
2274                                        pdev_state == PDRV_FAILED       ||
2275                                        pdev_state == PDRV_RBLD         ||
2276                                        pdev_state == PDRV_HOTSPARE     ||
2277                                        megaraid_expose_unconf_disks == 0) {
2278
2279                                        status = 0xF0;
2280                                }
2281                        }
2282                }
2283
2284                // Convert MegaRAID status to Linux error code
2285                switch (status) {
2286
2287                case 0x00:
2288
2289                        scp->result = (DID_OK << 16);
2290                        break;
2291
2292                case 0x02:
2293
2294                        /* set sense_buffer and result fields */
2295                        if (mbox->cmd == MBOXCMD_PASSTHRU ||
2296                                mbox->cmd == MBOXCMD_PASSTHRU64) {
2297
2298                                memcpy(scp->sense_buffer, pthru->reqsensearea,
2299                                                14);
2300
2301                                scp->result = SAM_STAT_CHECK_CONDITION;
2302                        }
2303                        else {
2304                                if (mbox->cmd == MBOXCMD_EXTPTHRU) {
2305
2306                                        memcpy(scp->sense_buffer,
2307                                                epthru->reqsensearea, 14);
2308
2309                                        scp->result = SAM_STAT_CHECK_CONDITION;
2310                                } else
2311                                        scsi_build_sense(scp, 0,
2312                                                         ABORTED_COMMAND, 0, 0);
2313                        }
2314                        break;
2315
2316                case 0x08:
2317
2318                        scp->result = DID_BUS_BUSY << 16 | status;
2319                        break;
2320
2321                default:
2322
2323                        /*
2324                         * If TEST_UNIT_READY fails, we know RESERVATION_STATUS
2325                         * failed
2326                         */
2327                        if (scp->cmnd[0] == TEST_UNIT_READY) {
2328                                scp->result = DID_ERROR << 16 |
2329                                        SAM_STAT_RESERVATION_CONFLICT;
2330                        }
2331                        else
2332                        /*
2333                         * Error code returned is 1 if Reserve or Release
2334                         * failed or the input parameter is invalid
2335                         */
2336                        if (status == 1 && (scp->cmnd[0] == RESERVE ||
2337                                         scp->cmnd[0] == RELEASE)) {
2338
2339                                scp->result = DID_ERROR << 16 |
2340                                        SAM_STAT_RESERVATION_CONFLICT;
2341                        }
2342                        else {
2343                                scp->result = DID_BAD_TARGET << 16 | status;
2344                        }
2345                }
2346
2347                // print a debug message for all failed commands
2348                if (status) {
2349                        megaraid_mbox_display_scb(adapter, scb);
2350                }
2351
2352                scsi_dma_unmap(scp);
2353
2354                // remove from local clist
2355                list_del_init(&scb->list);
2356
2357                // put back in free list
2358                megaraid_dealloc_scb(adapter, scb);
2359
2360                // send the scsi packet back to kernel
2361                scp->scsi_done(scp);
2362        }
2363
2364        return;
2365}
2366
2367
2368/**
2369 * megaraid_abort_handler - abort the scsi command
2370 * @scp         : command to be aborted
2371 *
2372 * Abort a previous SCSI request. Only commands on the pending list can be
2373 * aborted. All the commands issued to the F/W must complete.
2374 **/
2375static int
2376megaraid_abort_handler(struct scsi_cmnd *scp)
2377{
2378        adapter_t               *adapter;
2379        mraid_device_t          *raid_dev;
2380        scb_t                   *scb;
2381        scb_t                   *tmp;
2382        int                     found;
2383        unsigned long           flags;
2384        int                     i;
2385
2386
2387        adapter         = SCP2ADAPTER(scp);
2388        raid_dev        = ADAP2RAIDDEV(adapter);
2389
2390        con_log(CL_ANN, (KERN_WARNING
2391                "megaraid: aborting cmd=%x <c=%d t=%d l=%d>\n",
2392                scp->cmnd[0], SCP2CHANNEL(scp),
2393                SCP2TARGET(scp), SCP2LUN(scp)));
2394
2395        // If FW has stopped responding, simply return failure
2396        if (raid_dev->hw_error) {
2397                con_log(CL_ANN, (KERN_NOTICE
2398                        "megaraid: hw error, not aborting\n"));
2399                return FAILED;
2400        }
2401
2402        // There might a race here, where the command was completed by the
2403        // firmware and now it is on the completed list. Before we could
2404        // complete the command to the kernel in dpc, the abort came.
2405        // Find out if this is the case to avoid the race.
2406        scb = NULL;
2407        spin_lock_irqsave(COMPLETED_LIST_LOCK(adapter), flags);
2408        list_for_each_entry_safe(scb, tmp, &adapter->completed_list, list) {
2409
2410                if (scb->scp == scp) {  // Found command
2411
2412                        list_del_init(&scb->list);      // from completed list
2413
2414                        con_log(CL_ANN, (KERN_WARNING
2415                        "megaraid: %d[%d:%d], abort from completed list\n",
2416                                scb->sno, scb->dev_channel, scb->dev_target));
2417
2418                        scp->result = (DID_ABORT << 16);
2419                        scp->scsi_done(scp);
2420
2421                        megaraid_dealloc_scb(adapter, scb);
2422
2423                        spin_unlock_irqrestore(COMPLETED_LIST_LOCK(adapter),
2424                                flags);
2425
2426                        return SUCCESS;
2427                }
2428        }
2429        spin_unlock_irqrestore(COMPLETED_LIST_LOCK(adapter), flags);
2430
2431
2432        // Find out if this command is still on the pending list. If it is and
2433        // was never issued, abort and return success. If the command is owned
2434        // by the firmware, we must wait for it to complete by the FW.
2435        spin_lock_irqsave(PENDING_LIST_LOCK(adapter), flags);
2436        list_for_each_entry_safe(scb, tmp, &adapter->pend_list, list) {
2437
2438                if (scb->scp == scp) {  // Found command
2439
2440                        list_del_init(&scb->list);      // from pending list
2441
2442                        ASSERT(!(scb->state & SCB_ISSUED));
2443
2444                        con_log(CL_ANN, (KERN_WARNING
2445                                "megaraid abort: [%d:%d], driver owner\n",
2446                                scb->dev_channel, scb->dev_target));
2447
2448                        scp->result = (DID_ABORT << 16);
2449                        scp->scsi_done(scp);
2450
2451                        megaraid_dealloc_scb(adapter, scb);
2452
2453                        spin_unlock_irqrestore(PENDING_LIST_LOCK(adapter),
2454                                flags);
2455
2456                        return SUCCESS;
2457                }
2458        }
2459        spin_unlock_irqrestore(PENDING_LIST_LOCK(adapter), flags);
2460
2461
2462        // Check do we even own this command, in which case this would be
2463        // owned by the firmware. The only way to locate the FW scb is to
2464        // traverse through the list of all SCB, since driver does not
2465        // maintain these SCBs on any list
2466        found = 0;
2467        spin_lock_irq(&adapter->lock);
2468        for (i = 0; i < MBOX_MAX_SCSI_CMDS; i++) {
2469                scb = adapter->kscb_list + i;
2470
2471                if (scb->scp == scp) {
2472
2473                        found = 1;
2474
2475                        if (!(scb->state & SCB_ISSUED)) {
2476                                con_log(CL_ANN, (KERN_WARNING
2477                                "megaraid abort: %d[%d:%d], invalid state\n",
2478                                scb->sno, scb->dev_channel, scb->dev_target));
2479                                BUG();
2480                        }
2481                        else {
2482                                con_log(CL_ANN, (KERN_WARNING
2483                                "megaraid abort: %d[%d:%d], fw owner\n",
2484                                scb->sno, scb->dev_channel, scb->dev_target));
2485                        }
2486                }
2487        }
2488        spin_unlock_irq(&adapter->lock);
2489
2490        if (!found) {
2491                con_log(CL_ANN, (KERN_WARNING "megaraid abort: do now own\n"));
2492
2493                // FIXME: Should there be a callback for this command?
2494                return SUCCESS;
2495        }
2496
2497        // We cannot actually abort a command owned by firmware, return
2498        // failure and wait for reset. In host reset handler, we will find out
2499        // if the HBA is still live
2500        return FAILED;
2501}
2502
2503/**
2504 * megaraid_reset_handler - device reset handler for mailbox based driver
2505 * @scp         : reference command
2506 *
2507 * Reset handler for the mailbox based controller. First try to find out if
2508 * the FW is still live, in which case the outstanding commands counter mut go
2509 * down to 0. If that happens, also issue the reservation reset command to
2510 * relinquish (possible) reservations on the logical drives connected to this
2511 * host.
2512 **/
2513static int
2514megaraid_reset_handler(struct scsi_cmnd *scp)
2515{
2516        adapter_t       *adapter;
2517        scb_t           *scb;
2518        scb_t           *tmp;
2519        mraid_device_t  *raid_dev;
2520        unsigned long   flags;
2521        uint8_t         raw_mbox[sizeof(mbox_t)];
2522        int             rval;
2523        int             recovery_window;
2524        int             i;
2525        uioc_t          *kioc;
2526
2527        adapter         = SCP2ADAPTER(scp);
2528        raid_dev        = ADAP2RAIDDEV(adapter);
2529
2530        // return failure if adapter is not responding
2531        if (raid_dev->hw_error) {
2532                con_log(CL_ANN, (KERN_NOTICE
2533                        "megaraid: hw error, cannot reset\n"));
2534                return FAILED;
2535        }
2536
2537        // Under exceptional conditions, FW can take up to 3 minutes to
2538        // complete command processing. Wait for additional 2 minutes for the
2539        // pending commands counter to go down to 0. If it doesn't, let the
2540        // controller be marked offline
2541        // Also, reset all the commands currently owned by the driver
2542        spin_lock_irqsave(PENDING_LIST_LOCK(adapter), flags);
2543        list_for_each_entry_safe(scb, tmp, &adapter->pend_list, list) {
2544                list_del_init(&scb->list);      // from pending list
2545
2546                if (scb->sno >= MBOX_MAX_SCSI_CMDS) {
2547                        con_log(CL_ANN, (KERN_WARNING
2548                        "megaraid: IOCTL packet with %d[%d:%d] being reset\n",
2549                        scb->sno, scb->dev_channel, scb->dev_target));
2550
2551                        scb->status = -1;
2552
2553                        kioc                    = (uioc_t *)scb->gp;
2554                        kioc->status            = -EFAULT;
2555
2556                        megaraid_mbox_mm_done(adapter, scb);
2557                } else {
2558                        if (scb->scp == scp) {  // Found command
2559                                con_log(CL_ANN, (KERN_WARNING
2560                                        "megaraid: %d[%d:%d], reset from pending list\n",
2561                                        scb->sno, scb->dev_channel, scb->dev_target));
2562                        } else {
2563                                con_log(CL_ANN, (KERN_WARNING
2564                                "megaraid: IO packet with %d[%d:%d] being reset\n",
2565                                scb->sno, scb->dev_channel, scb->dev_target));
2566                        }
2567
2568                        scb->scp->result = (DID_RESET << 16);
2569                        scb->scp->scsi_done(scb->scp);
2570
2571                        megaraid_dealloc_scb(adapter, scb);
2572                }
2573        }
2574        spin_unlock_irqrestore(PENDING_LIST_LOCK(adapter), flags);
2575
2576        if (adapter->outstanding_cmds) {
2577                con_log(CL_ANN, (KERN_NOTICE
2578                        "megaraid: %d outstanding commands. Max wait %d sec\n",
2579                        adapter->outstanding_cmds,
2580                        (MBOX_RESET_WAIT + MBOX_RESET_EXT_WAIT)));
2581        }
2582
2583        recovery_window = MBOX_RESET_WAIT + MBOX_RESET_EXT_WAIT;
2584
2585        for (i = 0; i < recovery_window; i++) {
2586
2587                megaraid_ack_sequence(adapter);
2588
2589                // print a message once every 5 seconds only
2590                if (!(i % 5)) {
2591                        con_log(CL_ANN, (
2592                        "megaraid mbox: Wait for %d commands to complete:%d\n",
2593                                adapter->outstanding_cmds,
2594                                (MBOX_RESET_WAIT + MBOX_RESET_EXT_WAIT) - i));
2595                }
2596
2597                // bailout if no recovery happened in reset time
2598                if (adapter->outstanding_cmds == 0) {
2599                        break;
2600                }
2601
2602                msleep(1000);
2603        }
2604
2605        spin_lock(&adapter->lock);
2606
2607        // If still outstanding commands, bail out
2608        if (adapter->outstanding_cmds) {
2609                con_log(CL_ANN, (KERN_WARNING
2610                        "megaraid mbox: critical hardware error!\n"));
2611
2612                raid_dev->hw_error = 1;
2613
2614                rval = FAILED;
2615                goto out;
2616        }
2617        else {
2618                con_log(CL_ANN, (KERN_NOTICE
2619                "megaraid mbox: reset sequence completed successfully\n"));
2620        }
2621
2622
2623        // If the controller supports clustering, reset reservations
2624        if (!adapter->ha) {
2625                rval = SUCCESS;
2626                goto out;
2627        }
2628
2629        // clear reservations if any
2630        raw_mbox[0] = CLUSTER_CMD;
2631        raw_mbox[2] = RESET_RESERVATIONS;
2632
2633        rval = SUCCESS;
2634        if (mbox_post_sync_cmd_fast(adapter, raw_mbox) == 0) {
2635                con_log(CL_ANN,
2636                        (KERN_INFO "megaraid: reservation reset\n"));
2637        }
2638        else {
2639                rval = FAILED;
2640                con_log(CL_ANN, (KERN_WARNING
2641                                "megaraid: reservation reset failed\n"));
2642        }
2643
2644 out:
2645        spin_unlock(&adapter->lock);
2646        return rval;
2647}
2648
2649/*
2650 * START: internal commands library
2651 *
2652 * This section of the driver has the common routine used by the driver and
2653 * also has all the FW routines
2654 */
2655
2656/**
2657 * mbox_post_sync_cmd() - blocking command to the mailbox based controllers
2658 * @adapter     : controller's soft state
2659 * @raw_mbox    : the mailbox
2660 *
2661 * Issue a scb in synchronous and non-interrupt mode for mailbox based
2662 * controllers.
2663 */
2664static int
2665mbox_post_sync_cmd(adapter_t *adapter, uint8_t raw_mbox[])
2666{
2667        mraid_device_t  *raid_dev = ADAP2RAIDDEV(adapter);
2668        mbox_t          *mbox;
2669        uint8_t         status;
2670        int             i;
2671
2672        mbox    = raid_dev->mbox;
2673
2674        /*
2675         * Wait until mailbox is free
2676         */
2677        if (megaraid_busywait_mbox(raid_dev) != 0)
2678                goto blocked_mailbox;
2679
2680        /*
2681         * Copy mailbox data into host structure
2682         */
2683        memcpy((caddr_t)mbox, (caddr_t)raw_mbox, 16);
2684        mbox->cmdid             = 0xFE;
2685        mbox->busy              = 1;
2686        mbox->poll              = 0;
2687        mbox->ack               = 0;
2688        mbox->numstatus         = 0xFF;
2689        mbox->status            = 0xFF;
2690
2691        wmb();
2692        WRINDOOR(raid_dev, raid_dev->mbox_dma | 0x1);
2693
2694        // wait for maximum 1 second for status to post. If the status is not
2695        // available within 1 second, assume FW is initializing and wait
2696        // for an extended amount of time
2697        if (mbox->numstatus == 0xFF) {  // status not yet available
2698                udelay(25);
2699
2700                for (i = 0; mbox->numstatus == 0xFF && i < 1000; i++) {
2701                        rmb();
2702                        msleep(1);
2703                }
2704
2705
2706                if (i == 1000) {
2707                        con_log(CL_ANN, (KERN_NOTICE
2708                                "megaraid mailbox: wait for FW to boot      "));
2709
2710                        for (i = 0; (mbox->numstatus == 0xFF) &&
2711                                        (i < MBOX_RESET_WAIT); i++) {
2712                                rmb();
2713                                con_log(CL_ANN, ("\b\b\b\b\b[%03d]",
2714                                                        MBOX_RESET_WAIT - i));
2715                                msleep(1000);
2716                        }
2717
2718                        if (i == MBOX_RESET_WAIT) {
2719
2720                                con_log(CL_ANN, (
2721                                "\nmegaraid mailbox: status not available\n"));
2722
2723                                return -1;
2724                        }
2725                        con_log(CL_ANN, ("\b\b\b\b\b[ok] \n"));
2726                }
2727        }
2728
2729        // wait for maximum 1 second for poll semaphore
2730        if (mbox->poll != 0x77) {
2731                udelay(25);
2732
2733                for (i = 0; (mbox->poll != 0x77) && (i < 1000); i++) {
2734                        rmb();
2735                        msleep(1);
2736                }
2737
2738                if (i == 1000) {
2739                        con_log(CL_ANN, (KERN_WARNING
2740                        "megaraid mailbox: could not get poll semaphore\n"));
2741                        return -1;
2742                }
2743        }
2744
2745        WRINDOOR(raid_dev, raid_dev->mbox_dma | 0x2);
2746        wmb();
2747
2748        // wait for maximum 1 second for acknowledgement
2749        if (RDINDOOR(raid_dev) & 0x2) {
2750                udelay(25);
2751
2752                for (i = 0; (RDINDOOR(raid_dev) & 0x2) && (i < 1000); i++) {
2753                        rmb();
2754                        msleep(1);
2755                }
2756
2757                if (i == 1000) {
2758                        con_log(CL_ANN, (KERN_WARNING
2759                                "megaraid mailbox: could not acknowledge\n"));
2760                        return -1;
2761                }
2762        }
2763        mbox->poll      = 0;
2764        mbox->ack       = 0x77;
2765
2766        status = mbox->status;
2767
2768        // invalidate the completed command id array. After command
2769        // completion, firmware would write the valid id.
2770        mbox->numstatus = 0xFF;
2771        mbox->status    = 0xFF;
2772        for (i = 0; i < MBOX_MAX_FIRMWARE_STATUS; i++) {
2773                mbox->completed[i] = 0xFF;
2774        }
2775
2776        return status;
2777
2778blocked_mailbox:
2779
2780        con_log(CL_ANN, (KERN_WARNING "megaraid: blocked mailbox\n") );
2781        return -1;
2782}
2783
2784
2785/**
2786 * mbox_post_sync_cmd_fast - blocking command to the mailbox based controllers
2787 * @adapter     : controller's soft state
2788 * @raw_mbox    : the mailbox
2789 *
2790 * Issue a scb in synchronous and non-interrupt mode for mailbox based
2791 * controllers. This is a faster version of the synchronous command and
2792 * therefore can be called in interrupt-context as well.
2793 */
2794static int
2795mbox_post_sync_cmd_fast(adapter_t *adapter, uint8_t raw_mbox[])
2796{
2797        mraid_device_t  *raid_dev = ADAP2RAIDDEV(adapter);
2798        mbox_t          *mbox;
2799        long            i;
2800
2801
2802        mbox    = raid_dev->mbox;
2803
2804        // return immediately if the mailbox is busy
2805        if (mbox->busy) return -1;
2806
2807        // Copy mailbox data into host structure
2808        memcpy((caddr_t)mbox, (caddr_t)raw_mbox, 14);
2809        mbox->cmdid             = 0xFE;
2810        mbox->busy              = 1;
2811        mbox->poll              = 0;
2812        mbox->ack               = 0;
2813        mbox->numstatus         = 0xFF;
2814        mbox->status            = 0xFF;
2815
2816        wmb();
2817        WRINDOOR(raid_dev, raid_dev->mbox_dma | 0x1);
2818
2819        for (i = 0; i < MBOX_SYNC_WAIT_CNT; i++) {
2820                if (mbox->numstatus != 0xFF) break;
2821                rmb();
2822                udelay(MBOX_SYNC_DELAY_200);
2823        }
2824
2825        if (i == MBOX_SYNC_WAIT_CNT) {
2826                // We may need to re-calibrate the counter
2827                con_log(CL_ANN, (KERN_CRIT
2828                        "megaraid: fast sync command timed out\n"));
2829        }
2830
2831        WRINDOOR(raid_dev, raid_dev->mbox_dma | 0x2);
2832        wmb();
2833
2834        return mbox->status;
2835}
2836
2837
2838/**
2839 * megaraid_busywait_mbox() - Wait until the controller's mailbox is available
2840 * @raid_dev    : RAID device (HBA) soft state
2841 *
2842 * Wait until the controller's mailbox is available to accept more commands.
2843 * Wait for at most 1 second.
2844 */
2845static int
2846megaraid_busywait_mbox(mraid_device_t *raid_dev)
2847{
2848        mbox_t  *mbox = raid_dev->mbox;
2849        int     i = 0;
2850
2851        if (mbox->busy) {
2852                udelay(25);
2853                for (i = 0; mbox->busy && i < 1000; i++)
2854                        msleep(1);
2855        }
2856
2857        if (i < 1000) return 0;
2858        else return -1;
2859}
2860
2861
2862/**
2863 * megaraid_mbox_product_info - some static information about the controller
2864 * @adapter     : our soft state
2865 *
2866 * Issue commands to the controller to grab some parameters required by our
2867 * caller.
2868 */
2869static int
2870megaraid_mbox_product_info(adapter_t *adapter)
2871{
2872        mraid_device_t          *raid_dev = ADAP2RAIDDEV(adapter);
2873        mbox_t                  *mbox;
2874        uint8_t                 raw_mbox[sizeof(mbox_t)];
2875        mraid_pinfo_t           *pinfo;
2876        dma_addr_t              pinfo_dma_h;
2877        mraid_inquiry3_t        *mraid_inq3;
2878        int                     i;
2879
2880
2881        memset((caddr_t)raw_mbox, 0, sizeof(raw_mbox));
2882        mbox = (mbox_t *)raw_mbox;
2883
2884        /*
2885         * Issue an ENQUIRY3 command to find out certain adapter parameters,
2886         * e.g., max channels, max commands etc.
2887         */
2888        pinfo = dma_alloc_coherent(&adapter->pdev->dev, sizeof(mraid_pinfo_t),
2889                                   &pinfo_dma_h, GFP_KERNEL);
2890        if (pinfo == NULL) {
2891                con_log(CL_ANN, (KERN_WARNING
2892                        "megaraid: out of memory, %s %d\n", __func__,
2893                        __LINE__));
2894
2895                return -1;
2896        }
2897
2898        mbox->xferaddr = (uint32_t)adapter->ibuf_dma_h;
2899        memset((void *)adapter->ibuf, 0, MBOX_IBUF_SIZE);
2900
2901        raw_mbox[0] = FC_NEW_CONFIG;
2902        raw_mbox[2] = NC_SUBOP_ENQUIRY3;
2903        raw_mbox[3] = ENQ3_GET_SOLICITED_FULL;
2904
2905        // Issue the command
2906        if (mbox_post_sync_cmd(adapter, raw_mbox) != 0) {
2907
2908                con_log(CL_ANN, (KERN_WARNING "megaraid: Inquiry3 failed\n"));
2909
2910                dma_free_coherent(&adapter->pdev->dev, sizeof(mraid_pinfo_t),
2911                        pinfo, pinfo_dma_h);
2912
2913                return -1;
2914        }
2915
2916        /*
2917         * Collect information about state of each physical drive
2918         * attached to the controller. We will expose all the disks
2919         * which are not part of RAID
2920         */
2921        mraid_inq3 = (mraid_inquiry3_t *)adapter->ibuf;
2922        for (i = 0; i < MBOX_MAX_PHYSICAL_DRIVES; i++) {
2923                raid_dev->pdrv_state[i] = mraid_inq3->pdrv_state[i];
2924        }
2925
2926        /*
2927         * Get product info for information like number of channels,
2928         * maximum commands supported.
2929         */
2930        memset((caddr_t)raw_mbox, 0, sizeof(raw_mbox));
2931        mbox->xferaddr = (uint32_t)pinfo_dma_h;
2932
2933        raw_mbox[0] = FC_NEW_CONFIG;
2934        raw_mbox[2] = NC_SUBOP_PRODUCT_INFO;
2935
2936        if (mbox_post_sync_cmd(adapter, raw_mbox) != 0) {
2937
2938                con_log(CL_ANN, (KERN_WARNING
2939                        "megaraid: product info failed\n"));
2940
2941                dma_free_coherent(&adapter->pdev->dev, sizeof(mraid_pinfo_t),
2942                        pinfo, pinfo_dma_h);
2943
2944                return -1;
2945        }
2946
2947        /*
2948         * Setup some parameters for host, as required by our caller
2949         */
2950        adapter->max_channel = pinfo->nchannels;
2951
2952        /*
2953         * we will export all the logical drives on a single channel.
2954         * Add 1 since inquires do not come for inititor ID
2955         */
2956        adapter->max_target     = MAX_LOGICAL_DRIVES_40LD + 1;
2957        adapter->max_lun        = 8;    // up to 8 LUNs for non-disk devices
2958
2959        /*
2960         * These are the maximum outstanding commands for the scsi-layer
2961         */
2962        adapter->max_cmds       = MBOX_MAX_SCSI_CMDS;
2963
2964        memset(adapter->fw_version, 0, VERSION_SIZE);
2965        memset(adapter->bios_version, 0, VERSION_SIZE);
2966
2967        memcpy(adapter->fw_version, pinfo->fw_version, 4);
2968        adapter->fw_version[4] = 0;
2969
2970        memcpy(adapter->bios_version, pinfo->bios_version, 4);
2971        adapter->bios_version[4] = 0;
2972
2973        con_log(CL_ANN, (KERN_NOTICE
2974                "megaraid: fw version:[%s] bios version:[%s]\n",
2975                adapter->fw_version, adapter->bios_version));
2976
2977        dma_free_coherent(&adapter->pdev->dev, sizeof(mraid_pinfo_t), pinfo,
2978                        pinfo_dma_h);
2979
2980        return 0;
2981}
2982
2983
2984
2985/**
2986 * megaraid_mbox_extended_cdb - check for support for extended CDBs
2987 * @adapter     : soft state for the controller
2988 *
2989 * This routine check whether the controller in question supports extended
2990 * ( > 10 bytes ) CDBs.
2991 */
2992static int
2993megaraid_mbox_extended_cdb(adapter_t *adapter)
2994{
2995        mbox_t          *mbox;
2996        uint8_t         raw_mbox[sizeof(mbox_t)];
2997        int             rval;
2998
2999        mbox = (mbox_t *)raw_mbox;
3000
3001        memset((caddr_t)raw_mbox, 0, sizeof(raw_mbox));
3002        mbox->xferaddr  = (uint32_t)adapter->ibuf_dma_h;
3003
3004        memset((void *)adapter->ibuf, 0, MBOX_IBUF_SIZE);
3005
3006        raw_mbox[0] = MAIN_MISC_OPCODE;
3007        raw_mbox[2] = SUPPORT_EXT_CDB;
3008
3009        /*
3010         * Issue the command
3011         */
3012        rval = 0;
3013        if (mbox_post_sync_cmd(adapter, raw_mbox) != 0) {
3014                rval = -1;
3015        }
3016
3017        return rval;
3018}
3019
3020
3021/**
3022 * megaraid_mbox_support_ha - Do we support clustering
3023 * @adapter     : soft state for the controller
3024 * @init_id     : ID of the initiator
3025 *
3026 * Determine if the firmware supports clustering and the ID of the initiator.
3027 */
3028static int
3029megaraid_mbox_support_ha(adapter_t *adapter, uint16_t *init_id)
3030{
3031        mbox_t          *mbox;
3032        uint8_t         raw_mbox[sizeof(mbox_t)];
3033        int             rval;
3034
3035
3036        mbox = (mbox_t *)raw_mbox;
3037
3038        memset((caddr_t)raw_mbox, 0, sizeof(raw_mbox));
3039
3040        mbox->xferaddr = (uint32_t)adapter->ibuf_dma_h;
3041
3042        memset((void *)adapter->ibuf, 0, MBOX_IBUF_SIZE);
3043
3044        raw_mbox[0] = GET_TARGET_ID;
3045
3046        // Issue the command
3047        *init_id = 7;
3048        rval =  -1;
3049        if (mbox_post_sync_cmd(adapter, raw_mbox) == 0) {
3050
3051                *init_id = *(uint8_t *)adapter->ibuf;
3052
3053                con_log(CL_ANN, (KERN_INFO
3054                        "megaraid: cluster firmware, initiator ID: %d\n",
3055                        *init_id));
3056
3057                rval =  0;
3058        }
3059
3060        return rval;
3061}
3062
3063
3064/**
3065 * megaraid_mbox_support_random_del - Do we support random deletion
3066 * @adapter     : soft state for the controller
3067 *
3068 * Determine if the firmware supports random deletion.
3069 * Return:      1 is operation supported, 0 otherwise
3070 */
3071static int
3072megaraid_mbox_support_random_del(adapter_t *adapter)
3073{
3074        uint8_t         raw_mbox[sizeof(mbox_t)];
3075        int             rval;
3076
3077        /*
3078         * Newer firmware on Dell CERC expect a different
3079         * random deletion handling, so disable it.
3080         */
3081        if (adapter->pdev->vendor == PCI_VENDOR_ID_AMI &&
3082            adapter->pdev->device == PCI_DEVICE_ID_AMI_MEGARAID3 &&
3083            adapter->pdev->subsystem_vendor == PCI_VENDOR_ID_DELL &&
3084            adapter->pdev->subsystem_device == PCI_SUBSYS_ID_CERC_ATA100_4CH &&
3085            (adapter->fw_version[0] > '6' ||
3086             (adapter->fw_version[0] == '6' &&
3087              adapter->fw_version[2] > '6') ||
3088             (adapter->fw_version[0] == '6'
3089              && adapter->fw_version[2] == '6'
3090              && adapter->fw_version[3] > '1'))) {
3091                con_log(CL_DLEVEL1, ("megaraid: disable random deletion\n"));
3092                return 0;
3093        }
3094
3095        memset((caddr_t)raw_mbox, 0, sizeof(mbox_t));
3096
3097        raw_mbox[0] = FC_DEL_LOGDRV;
3098        raw_mbox[2] = OP_SUP_DEL_LOGDRV;
3099
3100        // Issue the command
3101        rval = 0;
3102        if (mbox_post_sync_cmd(adapter, raw_mbox) == 0) {
3103
3104                con_log(CL_DLEVEL1, ("megaraid: supports random deletion\n"));
3105
3106                rval =  1;
3107        }
3108
3109        return rval;
3110}
3111
3112
3113/**
3114 * megaraid_mbox_get_max_sg - maximum sg elements supported by the firmware
3115 * @adapter     : soft state for the controller
3116 *
3117 * Find out the maximum number of scatter-gather elements supported by the
3118 * firmware.
3119 */
3120static int
3121megaraid_mbox_get_max_sg(adapter_t *adapter)
3122{
3123        mbox_t          *mbox;
3124        uint8_t         raw_mbox[sizeof(mbox_t)];
3125        int             nsg;
3126
3127
3128        mbox = (mbox_t *)raw_mbox;
3129
3130        memset((caddr_t)raw_mbox, 0, sizeof(mbox_t));
3131
3132        mbox->xferaddr = (uint32_t)adapter->ibuf_dma_h;
3133
3134        memset((void *)adapter->ibuf, 0, MBOX_IBUF_SIZE);
3135
3136        raw_mbox[0] = MAIN_MISC_OPCODE;
3137        raw_mbox[2] = GET_MAX_SG_SUPPORT;
3138
3139        // Issue the command
3140        if (mbox_post_sync_cmd(adapter, raw_mbox) == 0) {
3141                nsg =  *(uint8_t *)adapter->ibuf;
3142        }
3143        else {
3144                nsg =  MBOX_DEFAULT_SG_SIZE;
3145        }
3146
3147        if (nsg > MBOX_MAX_SG_SIZE) nsg = MBOX_MAX_SG_SIZE;
3148
3149        return nsg;
3150}
3151
3152
3153/**
3154 * megaraid_mbox_enum_raid_scsi - enumerate the RAID and SCSI channels
3155 * @adapter     : soft state for the controller
3156 *
3157 * Enumerate the RAID and SCSI channels for ROMB platforms so that channels
3158 * can be exported as regular SCSI channels.
3159 */
3160static void
3161megaraid_mbox_enum_raid_scsi(adapter_t *adapter)
3162{
3163        mraid_device_t  *raid_dev = ADAP2RAIDDEV(adapter);
3164        mbox_t          *mbox;
3165        uint8_t         raw_mbox[sizeof(mbox_t)];
3166
3167
3168        mbox = (mbox_t *)raw_mbox;
3169
3170        memset((caddr_t)raw_mbox, 0, sizeof(mbox_t));
3171
3172        mbox->xferaddr = (uint32_t)adapter->ibuf_dma_h;
3173
3174        memset((void *)adapter->ibuf, 0, MBOX_IBUF_SIZE);
3175
3176        raw_mbox[0] = CHNL_CLASS;
3177        raw_mbox[2] = GET_CHNL_CLASS;
3178
3179        // Issue the command. If the command fails, all channels are RAID
3180        // channels
3181        raid_dev->channel_class = 0xFF;
3182        if (mbox_post_sync_cmd(adapter, raw_mbox) == 0) {
3183                raid_dev->channel_class =  *(uint8_t *)adapter->ibuf;
3184        }
3185
3186        return;
3187}
3188
3189
3190/**
3191 * megaraid_mbox_flush_cache - flush adapter and disks cache
3192 * @adapter             : soft state for the controller
3193 *
3194 * Flush adapter cache followed by disks cache.
3195 */
3196static void
3197megaraid_mbox_flush_cache(adapter_t *adapter)
3198{
3199        uint8_t raw_mbox[sizeof(mbox_t)];
3200
3201        memset((caddr_t)raw_mbox, 0, sizeof(mbox_t));
3202
3203        raw_mbox[0] = FLUSH_ADAPTER;
3204
3205        if (mbox_post_sync_cmd(adapter, raw_mbox) != 0) {
3206                con_log(CL_ANN, ("megaraid: flush adapter failed\n"));
3207        }
3208
3209        raw_mbox[0] = FLUSH_SYSTEM;
3210
3211        if (mbox_post_sync_cmd(adapter, raw_mbox) != 0) {
3212                con_log(CL_ANN, ("megaraid: flush disks cache failed\n"));
3213        }
3214
3215        return;
3216}
3217
3218
3219/**
3220 * megaraid_mbox_fire_sync_cmd - fire the sync cmd
3221 * @adapter             : soft state for the controller
3222 *
3223 * Clears the pending cmds in FW and reinits its RAID structs.
3224 */
3225static int
3226megaraid_mbox_fire_sync_cmd(adapter_t *adapter)
3227{
3228        mbox_t  *mbox;
3229        uint8_t raw_mbox[sizeof(mbox_t)];
3230        mraid_device_t  *raid_dev = ADAP2RAIDDEV(adapter);
3231        int     status = 0;
3232        int i;
3233        uint32_t dword;
3234
3235        memset((caddr_t)raw_mbox, 0, sizeof(mbox_t));
3236
3237        raw_mbox[0] = 0xFF;
3238
3239        mbox    = raid_dev->mbox;
3240
3241        /* Wait until mailbox is free */
3242        if (megaraid_busywait_mbox(raid_dev) != 0) {
3243                status = 1;
3244                goto blocked_mailbox;
3245        }
3246
3247        /* Copy mailbox data into host structure */
3248        memcpy((caddr_t)mbox, (caddr_t)raw_mbox, 16);
3249        mbox->cmdid             = 0xFE;
3250        mbox->busy              = 1;
3251        mbox->poll              = 0;
3252        mbox->ack               = 0;
3253        mbox->numstatus         = 0;
3254        mbox->status            = 0;
3255
3256        wmb();
3257        WRINDOOR(raid_dev, raid_dev->mbox_dma | 0x1);
3258
3259        /* Wait for maximum 1 min for status to post.
3260         * If the Firmware SUPPORTS the ABOVE COMMAND,
3261         * mbox->cmd will be set to 0
3262         * else
3263         * the firmware will reject the command with
3264         * mbox->numstatus set to 1
3265         */
3266
3267        i = 0;
3268        status = 0;
3269        while (!mbox->numstatus && mbox->cmd == 0xFF) {
3270                rmb();
3271                msleep(1);
3272                i++;
3273                if (i > 1000 * 60) {
3274                        status = 1;
3275                        break;
3276                }
3277        }
3278        if (mbox->numstatus == 1)
3279                status = 1; /*cmd not supported*/
3280
3281        /* Check for interrupt line */
3282        dword = RDOUTDOOR(raid_dev);
3283        WROUTDOOR(raid_dev, dword);
3284        WRINDOOR(raid_dev,2);
3285
3286        return status;
3287
3288blocked_mailbox:
3289        con_log(CL_ANN, (KERN_WARNING "megaraid: blocked mailbox\n"));
3290        return status;
3291}
3292
3293/**
3294 * megaraid_mbox_display_scb - display SCB information, mostly debug purposes
3295 * @adapter             : controller's soft state
3296 * @scb                 : SCB to be displayed
3297 *
3298 * Diplay information about the given SCB iff the current debug level is
3299 * verbose.
3300 */
3301static void
3302megaraid_mbox_display_scb(adapter_t *adapter, scb_t *scb)
3303{
3304        mbox_ccb_t              *ccb;
3305        struct scsi_cmnd        *scp;
3306        mbox_t                  *mbox;
3307        int                     level;
3308        int                     i;
3309
3310
3311        ccb     = (mbox_ccb_t *)scb->ccb;
3312        scp     = scb->scp;
3313        mbox    = ccb->mbox;
3314
3315        level = CL_DLEVEL3;
3316
3317        con_log(level, (KERN_NOTICE
3318                "megaraid mailbox: status:%#x cmd:%#x id:%#x ", scb->status,
3319                mbox->cmd, scb->sno));
3320
3321        con_log(level, ("sec:%#x lba:%#x addr:%#x ld:%d sg:%d\n",
3322                mbox->numsectors, mbox->lba, mbox->xferaddr, mbox->logdrv,
3323                mbox->numsge));
3324
3325        if (!scp) return;
3326
3327        con_log(level, (KERN_NOTICE "scsi cmnd: "));
3328
3329        for (i = 0; i < scp->cmd_len; i++) {
3330                con_log(level, ("%#2.02x ", scp->cmnd[i]));
3331        }
3332
3333        con_log(level, ("\n"));
3334
3335        return;
3336}
3337
3338
3339/**
3340 * megaraid_mbox_setup_device_map - manage device ids
3341 * @adapter     : Driver's soft state
3342 *
3343 * Manage the device ids to have an appropriate mapping between the kernel
3344 * scsi addresses and megaraid scsi and logical drive addresses. We export
3345 * scsi devices on their actual addresses, whereas the logical drives are
3346 * exported on a virtual scsi channel.
3347 */
3348static void
3349megaraid_mbox_setup_device_map(adapter_t *adapter)
3350{
3351        uint8_t         c;
3352        uint8_t         t;
3353
3354        /*
3355         * First fill the values on the logical drive channel
3356         */
3357        for (t = 0; t < LSI_MAX_LOGICAL_DRIVES_64LD; t++)
3358                adapter->device_ids[adapter->max_channel][t] =
3359                        (t < adapter->init_id) ?  t : t - 1;
3360
3361        adapter->device_ids[adapter->max_channel][adapter->init_id] = 0xFF;
3362
3363        /*
3364         * Fill the values on the physical devices channels
3365         */
3366        for (c = 0; c < adapter->max_channel; c++)
3367                for (t = 0; t < LSI_MAX_LOGICAL_DRIVES_64LD; t++)
3368                        adapter->device_ids[c][t] = (c << 8) | t;
3369}
3370
3371
3372/*
3373 * END: internal commands library
3374 */
3375
3376/*
3377 * START: Interface for the common management module
3378 *
3379 * This is the module, which interfaces with the common management module to
3380 * provide support for ioctl and sysfs
3381 */
3382
3383/**
3384 * megaraid_cmm_register - register with the management module
3385 * @adapter             : HBA soft state
3386 *
3387 * Register with the management module, which allows applications to issue
3388 * ioctl calls to the drivers. This interface is used by the management module
3389 * to setup sysfs support as well.
3390 */
3391static int
3392megaraid_cmm_register(adapter_t *adapter)
3393{
3394        mraid_device_t  *raid_dev = ADAP2RAIDDEV(adapter);
3395        mraid_mmadp_t   adp;
3396        scb_t           *scb;
3397        mbox_ccb_t      *ccb;
3398        int             rval;
3399        int             i;
3400
3401        // Allocate memory for the base list of scb for management module.
3402        adapter->uscb_list = kcalloc(MBOX_MAX_USER_CMDS, sizeof(scb_t), GFP_KERNEL);
3403
3404        if (adapter->uscb_list == NULL) {
3405                con_log(CL_ANN, (KERN_WARNING
3406                        "megaraid: out of memory, %s %d\n", __func__,
3407                        __LINE__));
3408                return -1;
3409        }
3410
3411
3412        // Initialize the synchronization parameters for resources for
3413        // commands for management module
3414        INIT_LIST_HEAD(&adapter->uscb_pool);
3415
3416        spin_lock_init(USER_FREE_LIST_LOCK(adapter));
3417
3418
3419
3420        // link all the packets. Note, CCB for commands, coming from the
3421        // commom management module, mailbox physical address are already
3422        // setup by it. We just need placeholder for that in our local command
3423        // control blocks
3424        for (i = 0; i < MBOX_MAX_USER_CMDS; i++) {
3425
3426                scb                     = adapter->uscb_list + i;
3427                ccb                     = raid_dev->uccb_list + i;
3428
3429                scb->ccb                = (caddr_t)ccb;
3430                ccb->mbox64             = raid_dev->umbox64 + i;
3431                ccb->mbox               = &ccb->mbox64->mbox32;
3432                ccb->raw_mbox           = (uint8_t *)ccb->mbox;
3433
3434                scb->gp                 = 0;
3435
3436                // COMMAND ID 0 - (MBOX_MAX_SCSI_CMDS-1) ARE RESERVED FOR
3437                // COMMANDS COMING FROM IO SUBSYSTEM (MID-LAYER)
3438                scb->sno                = i + MBOX_MAX_SCSI_CMDS;
3439
3440                scb->scp                = NULL;
3441                scb->state              = SCB_FREE;
3442                scb->dma_direction      = DMA_NONE;
3443                scb->dma_type           = MRAID_DMA_NONE;
3444                scb->dev_channel        = -1;
3445                scb->dev_target         = -1;
3446
3447                // put scb in the free pool
3448                list_add_tail(&scb->list, &adapter->uscb_pool);
3449        }
3450
3451        adp.unique_id           = adapter->unique_id;
3452        adp.drvr_type           = DRVRTYPE_MBOX;
3453        adp.drvr_data           = (unsigned long)adapter;
3454        adp.pdev                = adapter->pdev;
3455        adp.issue_uioc          = megaraid_mbox_mm_handler;
3456        adp.timeout             = MBOX_RESET_WAIT + MBOX_RESET_EXT_WAIT;
3457        adp.max_kioc            = MBOX_MAX_USER_CMDS;
3458
3459        if ((rval = mraid_mm_register_adp(&adp)) != 0) {
3460
3461                con_log(CL_ANN, (KERN_WARNING
3462                        "megaraid mbox: did not register with CMM\n"));
3463
3464                kfree(adapter->uscb_list);
3465        }
3466
3467        return rval;
3468}
3469
3470
3471/**
3472 * megaraid_cmm_unregister - un-register with the management module
3473 * @adapter             : HBA soft state
3474 *
3475 * Un-register with the management module.
3476 * FIXME: mgmt module must return failure for unregister if it has pending
3477 * commands in LLD.
3478 */
3479static int
3480megaraid_cmm_unregister(adapter_t *adapter)
3481{
3482        kfree(adapter->uscb_list);
3483        mraid_mm_unregister_adp(adapter->unique_id);
3484        return 0;
3485}
3486
3487
3488/**
3489 * megaraid_mbox_mm_handler - interface for CMM to issue commands to LLD
3490 * @drvr_data           : LLD specific data
3491 * @kioc                : CMM interface packet
3492 * @action              : command action
3493 *
3494 * This routine is invoked whenever the Common Management Module (CMM) has a
3495 * command for us. The 'action' parameter specifies if this is a new command
3496 * or otherwise.
3497 */
3498static int
3499megaraid_mbox_mm_handler(unsigned long drvr_data, uioc_t *kioc, uint32_t action)
3500{
3501        adapter_t *adapter;
3502
3503        if (action != IOCTL_ISSUE) {
3504                con_log(CL_ANN, (KERN_WARNING
3505                        "megaraid: unsupported management action:%#2x\n",
3506                        action));
3507                return (-ENOTSUPP);
3508        }
3509
3510        adapter = (adapter_t *)drvr_data;
3511
3512        // make sure this adapter is not being detached right now.
3513        if (atomic_read(&adapter->being_detached)) {
3514                con_log(CL_ANN, (KERN_WARNING
3515                        "megaraid: reject management request, detaching\n"));
3516                return (-ENODEV);
3517        }
3518
3519        switch (kioc->opcode) {
3520
3521        case GET_ADAP_INFO:
3522
3523                kioc->status =  gather_hbainfo(adapter, (mraid_hba_info_t *)
3524                                        (unsigned long)kioc->buf_vaddr);
3525
3526                kioc->done(kioc);
3527
3528                return kioc->status;
3529
3530        case MBOX_CMD:
3531
3532                return megaraid_mbox_mm_command(adapter, kioc);
3533
3534        default:
3535                kioc->status = (-EINVAL);
3536                kioc->done(kioc);
3537                return (-EINVAL);
3538        }
3539
3540        return 0;       // not reached
3541}
3542
3543/**
3544 * megaraid_mbox_mm_command - issues commands routed through CMM
3545 * @adapter             : HBA soft state
3546 * @kioc                : management command packet
3547 *
3548 * Issues commands, which are routed through the management module.
3549 */
3550static int
3551megaraid_mbox_mm_command(adapter_t *adapter, uioc_t *kioc)
3552{
3553        struct list_head        *head = &adapter->uscb_pool;
3554        mbox64_t                *mbox64;
3555        uint8_t                 *raw_mbox;
3556        scb_t                   *scb;
3557        mbox_ccb_t              *ccb;
3558        unsigned long           flags;
3559
3560        // detach one scb from free pool
3561        spin_lock_irqsave(USER_FREE_LIST_LOCK(adapter), flags);
3562
3563        if (list_empty(head)) { // should never happen because of CMM
3564
3565                con_log(CL_ANN, (KERN_WARNING
3566                        "megaraid mbox: bug in cmm handler, lost resources\n"));
3567
3568                spin_unlock_irqrestore(USER_FREE_LIST_LOCK(adapter), flags);
3569
3570                return (-EINVAL);
3571        }
3572
3573        scb = list_entry(head->next, scb_t, list);
3574        list_del_init(&scb->list);
3575
3576        spin_unlock_irqrestore(USER_FREE_LIST_LOCK(adapter), flags);
3577
3578        scb->state              = SCB_ACTIVE;
3579        scb->dma_type           = MRAID_DMA_NONE;
3580        scb->dma_direction      = DMA_NONE;
3581
3582        ccb             = (mbox_ccb_t *)scb->ccb;
3583        mbox64          = (mbox64_t *)(unsigned long)kioc->cmdbuf;
3584        raw_mbox        = (uint8_t *)&mbox64->mbox32;
3585
3586        memcpy(ccb->mbox64, mbox64, sizeof(mbox64_t));
3587
3588        scb->gp         = (unsigned long)kioc;
3589
3590        /*
3591         * If it is a logdrv random delete operation, we have to wait till
3592         * there are no outstanding cmds at the fw and then issue it directly
3593         */
3594        if (raw_mbox[0] == FC_DEL_LOGDRV && raw_mbox[2] == OP_DEL_LOGDRV) {
3595
3596                if (wait_till_fw_empty(adapter)) {
3597                        con_log(CL_ANN, (KERN_NOTICE
3598                                "megaraid mbox: LD delete, timed out\n"));
3599
3600                        kioc->status = -ETIME;
3601
3602                        scb->status = -1;
3603
3604                        megaraid_mbox_mm_done(adapter, scb);
3605
3606                        return (-ETIME);
3607                }
3608
3609                INIT_LIST_HEAD(&scb->list);
3610
3611                scb->state = SCB_ISSUED;
3612                if (mbox_post_cmd(adapter, scb) != 0) {
3613
3614                        con_log(CL_ANN, (KERN_NOTICE
3615                                "megaraid mbox: LD delete, mailbox busy\n"));
3616
3617                        kioc->status = -EBUSY;
3618
3619                        scb->status = -1;
3620
3621                        megaraid_mbox_mm_done(adapter, scb);
3622
3623                        return (-EBUSY);
3624                }
3625
3626                return 0;
3627        }
3628
3629        // put the command on the pending list and execute
3630        megaraid_mbox_runpendq(adapter, scb);
3631
3632        return 0;
3633}
3634
3635
3636static int
3637wait_till_fw_empty(adapter_t *adapter)
3638{
3639        unsigned long   flags = 0;
3640        int             i;
3641
3642
3643        /*
3644         * Set the quiescent flag to stop issuing cmds to FW.
3645         */
3646        spin_lock_irqsave(&adapter->lock, flags);
3647        adapter->quiescent++;
3648        spin_unlock_irqrestore(&adapter->lock, flags);
3649
3650        /*
3651         * Wait till there are no more cmds outstanding at FW. Try for at most
3652         * 60 seconds
3653         */
3654        for (i = 0; i < 60 && adapter->outstanding_cmds; i++) {
3655                con_log(CL_DLEVEL1, (KERN_INFO
3656                        "megaraid: FW has %d pending commands\n",
3657                        adapter->outstanding_cmds));
3658
3659                msleep(1000);
3660        }
3661
3662        return adapter->outstanding_cmds;
3663}
3664
3665
3666/**
3667 * megaraid_mbox_mm_done - callback for CMM commands
3668 * @adapter     : HBA soft state
3669 * @scb         : completed command
3670 *
3671 * Callback routine for internal commands originated from the management
3672 * module.
3673 */
3674static void
3675megaraid_mbox_mm_done(adapter_t *adapter, scb_t *scb)
3676{
3677        uioc_t                  *kioc;
3678        mbox64_t                *mbox64;
3679        uint8_t                 *raw_mbox;
3680        unsigned long           flags;
3681
3682        kioc                    = (uioc_t *)scb->gp;
3683        mbox64                  = (mbox64_t *)(unsigned long)kioc->cmdbuf;
3684        mbox64->mbox32.status   = scb->status;
3685        raw_mbox                = (uint8_t *)&mbox64->mbox32;
3686
3687
3688        // put scb in the free pool
3689        scb->state      = SCB_FREE;
3690        scb->scp        = NULL;
3691
3692        spin_lock_irqsave(USER_FREE_LIST_LOCK(adapter), flags);
3693
3694        list_add(&scb->list, &adapter->uscb_pool);
3695
3696        spin_unlock_irqrestore(USER_FREE_LIST_LOCK(adapter), flags);
3697
3698        // if a delete logical drive operation succeeded, restart the
3699        // controller
3700        if (raw_mbox[0] == FC_DEL_LOGDRV && raw_mbox[2] == OP_DEL_LOGDRV) {
3701
3702                adapter->quiescent--;
3703
3704                megaraid_mbox_runpendq(adapter, NULL);
3705        }
3706
3707        kioc->done(kioc);
3708
3709        return;
3710}
3711
3712
3713/**
3714 * gather_hbainfo - HBA characteristics for the applications
3715 * @adapter             : HBA soft state
3716 * @hinfo               : pointer to the caller's host info strucuture
3717 */
3718static int
3719gather_hbainfo(adapter_t *adapter, mraid_hba_info_t *hinfo)
3720{
3721        hinfo->pci_vendor_id    = adapter->pdev->vendor;
3722        hinfo->pci_device_id    = adapter->pdev->device;
3723        hinfo->subsys_vendor_id = adapter->pdev->subsystem_vendor;
3724        hinfo->subsys_device_id = adapter->pdev->subsystem_device;
3725
3726        hinfo->pci_bus          = adapter->pdev->bus->number;
3727        hinfo->pci_dev_fn       = adapter->pdev->devfn;
3728        hinfo->pci_slot         = PCI_SLOT(adapter->pdev->devfn);
3729        hinfo->irq              = adapter->host->irq;
3730        hinfo->baseport         = ADAP2RAIDDEV(adapter)->baseport;
3731
3732        hinfo->unique_id        = (hinfo->pci_bus << 8) | adapter->pdev->devfn;
3733        hinfo->host_no          = adapter->host->host_no;
3734
3735        return 0;
3736}
3737
3738/*
3739 * END: Interface for the common management module
3740 */
3741
3742
3743
3744/**
3745 * megaraid_sysfs_alloc_resources - allocate sysfs related resources
3746 * @adapter     : controller's soft state
3747 *
3748 * Allocate packets required to issue FW calls whenever the sysfs attributes
3749 * are read. These attributes would require up-to-date information from the
3750 * FW. Also set up resources for mutual exclusion to share these resources and
3751 * the wait queue.
3752 *
3753 * Return 0 on success.
3754 * Return -ERROR_CODE on failure.
3755 */
3756static int
3757megaraid_sysfs_alloc_resources(adapter_t *adapter)
3758{
3759        mraid_device_t  *raid_dev = ADAP2RAIDDEV(adapter);
3760        int             rval = 0;
3761
3762        raid_dev->sysfs_uioc = kmalloc(sizeof(uioc_t), GFP_KERNEL);
3763
3764        raid_dev->sysfs_mbox64 = kmalloc(sizeof(mbox64_t), GFP_KERNEL);
3765
3766        raid_dev->sysfs_buffer = dma_alloc_coherent(&adapter->pdev->dev,
3767                        PAGE_SIZE, &raid_dev->sysfs_buffer_dma, GFP_KERNEL);
3768
3769        if (!raid_dev->sysfs_uioc || !raid_dev->sysfs_mbox64 ||
3770                !raid_dev->sysfs_buffer) {
3771
3772                con_log(CL_ANN, (KERN_WARNING
3773                        "megaraid: out of memory, %s %d\n", __func__,
3774                        __LINE__));
3775
3776                rval = -ENOMEM;
3777
3778                megaraid_sysfs_free_resources(adapter);
3779        }
3780
3781        mutex_init(&raid_dev->sysfs_mtx);
3782
3783        init_waitqueue_head(&raid_dev->sysfs_wait_q);
3784
3785        return rval;
3786}
3787
3788
3789/**
3790 * megaraid_sysfs_free_resources - free sysfs related resources
3791 * @adapter     : controller's soft state
3792 *
3793 * Free packets allocated for sysfs FW commands
3794 */
3795static void
3796megaraid_sysfs_free_resources(adapter_t *adapter)
3797{
3798        mraid_device_t  *raid_dev = ADAP2RAIDDEV(adapter);
3799
3800        kfree(raid_dev->sysfs_uioc);
3801        kfree(raid_dev->sysfs_mbox64);
3802
3803        if (raid_dev->sysfs_buffer) {
3804                dma_free_coherent(&adapter->pdev->dev, PAGE_SIZE,
3805                        raid_dev->sysfs_buffer, raid_dev->sysfs_buffer_dma);
3806        }
3807}
3808
3809
3810/**
3811 * megaraid_sysfs_get_ldmap_done - callback for get ldmap
3812 * @uioc        : completed packet
3813 *
3814 * Callback routine called in the ISR/tasklet context for get ldmap call
3815 */
3816static void
3817megaraid_sysfs_get_ldmap_done(uioc_t *uioc)
3818{
3819        adapter_t       *adapter = (adapter_t *)uioc->buf_vaddr;
3820        mraid_device_t  *raid_dev = ADAP2RAIDDEV(adapter);
3821
3822        uioc->status = 0;
3823
3824        wake_up(&raid_dev->sysfs_wait_q);
3825}
3826
3827/**
3828 * megaraid_sysfs_get_ldmap_timeout - timeout handling for get ldmap
3829 * @t   : timed out timer
3830 *
3831 * Timeout routine to recover and return to application, in case the adapter
3832 * has stopped responding. A timeout of 60 seconds for this command seems like
3833 * a good value.
3834 */
3835static void
3836megaraid_sysfs_get_ldmap_timeout(struct timer_list *t)
3837{
3838        struct uioc_timeout *timeout = from_timer(timeout, t, timer);
3839        uioc_t          *uioc = timeout->uioc;
3840        adapter_t       *adapter = (adapter_t *)uioc->buf_vaddr;
3841        mraid_device_t  *raid_dev = ADAP2RAIDDEV(adapter);
3842
3843        uioc->status = -ETIME;
3844
3845        wake_up(&raid_dev->sysfs_wait_q);
3846}
3847
3848
3849/**
3850 * megaraid_sysfs_get_ldmap - get update logical drive map
3851 * @adapter     : controller's soft state
3852 *
3853 * This routine will be called whenever user reads the logical drive
3854 * attributes, go get the current logical drive mapping table from the
3855 * firmware. We use the management API's to issue commands to the controller.
3856 *
3857 * NOTE: The commands issuance functionality is not generalized and
3858 * implemented in context of "get ld map" command only. If required, the
3859 * command issuance logical can be trivially pulled out and implemented as a
3860 * standalone library. For now, this should suffice since there is no other
3861 * user of this interface.
3862 *
3863 * Return 0 on success.
3864 * Return -1 on failure.
3865 */
3866static int
3867megaraid_sysfs_get_ldmap(adapter_t *adapter)
3868{
3869        mraid_device_t          *raid_dev = ADAP2RAIDDEV(adapter);
3870        uioc_t                  *uioc;
3871        mbox64_t                *mbox64;
3872        mbox_t                  *mbox;
3873        char                    *raw_mbox;
3874        struct uioc_timeout     timeout;
3875        caddr_t                 ldmap;
3876        int                     rval = 0;
3877
3878        /*
3879         * Allow only one read at a time to go through the sysfs attributes
3880         */
3881        mutex_lock(&raid_dev->sysfs_mtx);
3882
3883        uioc    = raid_dev->sysfs_uioc;
3884        mbox64  = raid_dev->sysfs_mbox64;
3885        ldmap   = raid_dev->sysfs_buffer;
3886
3887        memset(uioc, 0, sizeof(uioc_t));
3888        memset(mbox64, 0, sizeof(mbox64_t));
3889        memset(ldmap, 0, sizeof(raid_dev->curr_ldmap));
3890
3891        mbox            = &mbox64->mbox32;
3892        raw_mbox        = (char *)mbox;
3893        uioc->cmdbuf    = (uint64_t)(unsigned long)mbox64;
3894        uioc->buf_vaddr = (caddr_t)adapter;
3895        uioc->status    = -ENODATA;
3896        uioc->done      = megaraid_sysfs_get_ldmap_done;
3897
3898        /*
3899         * Prepare the mailbox packet to get the current logical drive mapping
3900         * table
3901         */
3902        mbox->xferaddr = (uint32_t)raid_dev->sysfs_buffer_dma;
3903
3904        raw_mbox[0] = FC_DEL_LOGDRV;
3905        raw_mbox[2] = OP_GET_LDID_MAP;
3906
3907        /*
3908         * Setup a timer to recover from a non-responding controller
3909         */
3910        timeout.uioc = uioc;
3911        timer_setup_on_stack(&timeout.timer,
3912                             megaraid_sysfs_get_ldmap_timeout, 0);
3913
3914        timeout.timer.expires           = jiffies + 60 * HZ;
3915        add_timer(&timeout.timer);
3916
3917        /*
3918         * Send the command to the firmware
3919         */
3920        rval = megaraid_mbox_mm_command(adapter, uioc);
3921
3922        if (rval == 0) {        // command successfully issued
3923                wait_event(raid_dev->sysfs_wait_q, (uioc->status != -ENODATA));
3924
3925                /*
3926                 * Check if the command timed out
3927                 */
3928                if (uioc->status == -ETIME) {
3929                        con_log(CL_ANN, (KERN_NOTICE
3930                                "megaraid: sysfs get ld map timed out\n"));
3931
3932                        rval = -ETIME;
3933                }
3934                else {
3935                        rval = mbox->status;
3936                }
3937
3938                if (rval == 0) {
3939                        memcpy(raid_dev->curr_ldmap, ldmap,
3940                                sizeof(raid_dev->curr_ldmap));
3941                }
3942                else {
3943                        con_log(CL_ANN, (KERN_NOTICE
3944                                "megaraid: get ld map failed with %x\n", rval));
3945                }
3946        }
3947        else {
3948                con_log(CL_ANN, (KERN_NOTICE
3949                        "megaraid: could not issue ldmap command:%x\n", rval));
3950        }
3951
3952
3953        del_timer_sync(&timeout.timer);
3954        destroy_timer_on_stack(&timeout.timer);
3955
3956        mutex_unlock(&raid_dev->sysfs_mtx);
3957
3958        return rval;
3959}
3960
3961
3962/**
3963 * megaraid_mbox_app_hndl_show - display application handle for this adapter
3964 * @dev         : class device object representation for the host
3965 * @attr        : device attribute (unused)
3966 * @buf         : buffer to send data to
3967 *
3968 * Display the handle used by the applications while executing management
3969 * tasks on the adapter. We invoke a management module API to get the adapter
3970 * handle, since we do not interface with applications directly.
3971 */
3972static ssize_t
3973megaraid_mbox_app_hndl_show(struct device *dev, struct device_attribute *attr, char *buf)
3974{
3975        struct Scsi_Host *shost = class_to_shost(dev);
3976        adapter_t       *adapter = (adapter_t *)SCSIHOST2ADAP(shost);
3977        uint32_t        app_hndl;
3978
3979        app_hndl = mraid_mm_adapter_app_handle(adapter->unique_id);
3980
3981        return snprintf(buf, 8, "%u\n", app_hndl);
3982}
3983
3984
3985/**
3986 * megaraid_mbox_ld_show - display the logical drive number for this device
3987 * @dev         : device object representation for the scsi device
3988 * @attr        : device attribute to show
3989 * @buf         : buffer to send data to
3990 *
3991 * Display the logical drive number for the device in question, if it a valid
3992 * logical drive. For physical devices, "-1" is returned.
3993 *
3994 * The logical drive number is displayed in following format:
3995 *
3996 * <SCSI ID> <LD NUM> <LD STICKY ID> <APP ADAPTER HANDLE>
3997 *
3998 *   <int>     <int>       <int>            <int>
3999 */
4000static ssize_t
4001megaraid_mbox_ld_show(struct device *dev, struct device_attribute *attr, char *buf)
4002{
4003        struct scsi_device *sdev = to_scsi_device(dev);
4004        adapter_t       *adapter = (adapter_t *)SCSIHOST2ADAP(sdev->host);
4005        mraid_device_t  *raid_dev = ADAP2RAIDDEV(adapter);
4006        int             scsi_id = -1;
4007        int             logical_drv = -1;
4008        int             ldid_map = -1;
4009        uint32_t        app_hndl = 0;
4010        int             mapped_sdev_id;
4011        int             rval;
4012        int             i;
4013
4014        if (raid_dev->random_del_supported &&
4015                        MRAID_IS_LOGICAL_SDEV(adapter, sdev)) {
4016
4017                rval = megaraid_sysfs_get_ldmap(adapter);
4018                if (rval == 0) {
4019
4020                        for (i = 0; i < MAX_LOGICAL_DRIVES_40LD; i++) {
4021
4022                                mapped_sdev_id = sdev->id;
4023
4024                                if (sdev->id > adapter->init_id) {
4025                                        mapped_sdev_id -= 1;
4026                                }
4027
4028                                if (raid_dev->curr_ldmap[i] == mapped_sdev_id) {
4029
4030                                        scsi_id = sdev->id;
4031
4032                                        logical_drv = i;
4033
4034                                        ldid_map = raid_dev->curr_ldmap[i];
4035
4036                                        app_hndl = mraid_mm_adapter_app_handle(
4037                                                        adapter->unique_id);
4038
4039                                        break;
4040                                }
4041                        }
4042                }
4043                else {
4044                        con_log(CL_ANN, (KERN_NOTICE
4045                                "megaraid: sysfs get ld map failed: %x\n",
4046                                rval));
4047                }
4048        }
4049
4050        return snprintf(buf, 36, "%d %d %d %d\n", scsi_id, logical_drv,
4051                        ldid_map, app_hndl);
4052}
4053
4054
4055/*
4056 * END: Mailbox Low Level Driver
4057 */
4058module_init(megaraid_init);
4059module_exit(megaraid_exit);
4060
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