drivers/scsi/megaraid/megaraid_mbox.c

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