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/ChangeLog.megaraid
  71  */
  72
  73 #include "megaraid_mbox.h"
  74
  75 static int megaraid_init(void);
  76 static void megaraid_exit(void);
  77
  78 static int megaraid_probe_one(struct pci_dev*, const struct pci_device_id *);
  79 static void megaraid_detach_one(struct pci_dev *);
  80 static void megaraid_mbox_shutdown(struct pci_dev *);
  81
  82 static int megaraid_io_attach(adapter_t *);
  83 static void megaraid_io_detach(adapter_t *);
  84
  85 static int megaraid_init_mbox(adapter_t *);
  86 static void megaraid_fini_mbox(adapter_t *);
  87
  88 static int megaraid_alloc_cmd_packets(adapter_t *);
  89 static void megaraid_free_cmd_packets(adapter_t *);
  90
  91 static int megaraid_mbox_setup_dma_pools(adapter_t *);
  92 static void megaraid_mbox_teardown_dma_pools(adapter_t *);
  93
  94 static int megaraid_sysfs_alloc_resources(adapter_t *);
  95 static void megaraid_sysfs_free_resources(adapter_t *);
  96
  97 static int megaraid_abort_handler(struct scsi_cmnd *);
  98 static int megaraid_reset_handler(struct scsi_cmnd *);
  99
 100 static int mbox_post_sync_cmd(adapter_t *, uint8_t []);
 101 static int mbox_post_sync_cmd_fast(adapter_t *, uint8_t []);
 102 static int megaraid_busywait_mbox(mraid_device_t *);
 103 static int megaraid_mbox_product_info(adapter_t *);
 104 static int megaraid_mbox_extended_cdb(adapter_t *);
 105 static int megaraid_mbox_support_ha(adapter_t *, uint16_t *);
 106 static int megaraid_mbox_support_random_del(adapter_t *);
 107 static int megaraid_mbox_get_max_sg(adapter_t *);
 108 static void megaraid_mbox_enum_raid_scsi(adapter_t *);
 109 static void megaraid_mbox_flush_cache(adapter_t *);
 110 static int megaraid_mbox_fire_sync_cmd(adapter_t *);
 111
 112 static void megaraid_mbox_display_scb(adapter_t *, scb_t *);
 113 static void megaraid_mbox_setup_device_map(adapter_t *);
 114
 115 static int megaraid_queue_command(struct scsi_cmnd *,
 116                 void (*)(struct scsi_cmnd *));
 117 static scb_t *megaraid_mbox_build_cmd(adapter_t *, struct scsi_cmnd *, int *);
 118 static void megaraid_mbox_runpendq(adapter_t *, scb_t *);
 119 static void megaraid_mbox_prepare_pthru(adapter_t *, scb_t *,
 120                 struct scsi_cmnd *);
 121 static void megaraid_mbox_prepare_epthru(adapter_t *, scb_t *,
 122                 struct scsi_cmnd *);
 123
 124 static irqreturn_t megaraid_isr(int, void *);
 125
 126 static void megaraid_mbox_dpc(unsigned long);
 127
 128 static ssize_t megaraid_sysfs_show_app_hndl(struct class_device *, char *);
 129 static ssize_t megaraid_sysfs_show_ldnum(struct device *, struct device_attribute *attr, char *);
 130
 131 static int megaraid_cmm_register(adapter_t *);
 132 static int megaraid_cmm_unregister(adapter_t *);
 133 static int megaraid_mbox_mm_handler(unsigned long, uioc_t *, uint32_t);
 134 static int megaraid_mbox_mm_command(adapter_t *, uioc_t *);
 135 static void megaraid_mbox_mm_done(adapter_t *, scb_t *);
 136 static int gather_hbainfo(adapter_t *, mraid_hba_info_t *);
 137 static int wait_till_fw_empty(adapter_t *);
 138
 139
 140
 141 MODULE_AUTHOR("megaraidlinux@lsi.com");
 142 MODULE_DESCRIPTION("LSI Logic MegaRAID Mailbox Driver");
 143 MODULE_LICENSE("GPL");
 144 MODULE_VERSION(MEGARAID_VERSION);
 145
 146 /*
 147  * ### modules parameters for driver ###
 148  */
 149
 150 /*
 151  * Set to enable driver to expose unconfigured disk to kernel
 152  */
 153 static int megaraid_expose_unconf_disks = 0;
 154 module_param_named(unconf_disks, megaraid_expose_unconf_disks, int, 0);
 155 MODULE_PARM_DESC(unconf_disks,
 156         "Set to expose unconfigured disks to kernel (default=0)");
 157
 158 /*
 159  * driver wait time if the adapter's mailbox is busy
 160  */
 161 static unsigned int max_mbox_busy_wait = MBOX_BUSY_WAIT;
 162 module_param_named(busy_wait, max_mbox_busy_wait, int, 0);
 163 MODULE_PARM_DESC(busy_wait,
 164         "Max wait for mailbox in microseconds if busy (default=10)");
 165
 166 /*
 167  * number of sectors per IO command
 168  */
 169 static unsigned int megaraid_max_sectors = MBOX_MAX_SECTORS;
 170 module_param_named(max_sectors, megaraid_max_sectors, int, 0);
 171 MODULE_PARM_DESC(max_sectors,
 172         "Maximum number of sectors per IO command (default=128)");
 173
 174 /*
 175  * number of commands per logical unit
 176  */
 177 static unsigned int megaraid_cmd_per_lun = MBOX_DEF_CMD_PER_LUN;
 178 module_param_named(cmd_per_lun, megaraid_cmd_per_lun, int, 0);
 179 MODULE_PARM_DESC(cmd_per_lun,
 180         "Maximum number of commands per logical unit (default=64)");
 181
 182
 183 /*
 184  * Fast driver load option, skip scanning for physical devices during load.
 185  * This would result in non-disk devices being skipped during driver load
 186  * time. These can be later added though, using /proc/scsi/scsi
 187  */
 188 static unsigned int megaraid_fast_load = 0;
 189 module_param_named(fast_load, megaraid_fast_load, int, 0);
 190 MODULE_PARM_DESC(fast_load,
 191         "Faster loading of the driver, skips physical devices! (default=0)");
 192
 193
 194 /*
 195  * mraid_debug level - threshold for amount of information to be displayed by
 196  * the driver. This level can be changed through modules parameters, ioctl or
 197  * sysfs/proc interface. By default, print the announcement messages only.
 198  */
 199 int mraid_debug_level = CL_ANN;
 200 module_param_named(debug_level, mraid_debug_level, int, 0);
 201 MODULE_PARM_DESC(debug_level, "Debug level for driver (default=0)");
 202
 203 /*
 204  * ### global data ###
 205  */
 206 static uint8_t megaraid_mbox_version[8] =
 207         { 0x02, 0x20, 0x04, 0x06, 3, 7, 20, 5 };
 208
 209
 210 /*
 211  * PCI table for all supported controllers.
 212  */
 213 static struct pci_device_id pci_id_table_g[] =  {
 214         {
 215                 PCI_VENDOR_ID_DELL,
 216                 PCI_DEVICE_ID_PERC4_DI_DISCOVERY,
 217                 PCI_VENDOR_ID_DELL,
 218                 PCI_SUBSYS_ID_PERC4_DI_DISCOVERY,
 219         },
 220         {
 221                 PCI_VENDOR_ID_LSI_LOGIC,
 222                 PCI_DEVICE_ID_PERC4_SC,
 223                 PCI_VENDOR_ID_DELL,
 224                 PCI_SUBSYS_ID_PERC4_SC,
 225         },
 226         {
 227                 PCI_VENDOR_ID_LSI_LOGIC,
 228                 PCI_DEVICE_ID_PERC4_DC,
 229                 PCI_VENDOR_ID_DELL,
 230                 PCI_SUBSYS_ID_PERC4_DC,
 231         },
 232         {
 233                 PCI_VENDOR_ID_LSI_LOGIC,
 234                 PCI_DEVICE_ID_VERDE,
 235                 PCI_ANY_ID,
 236                 PCI_ANY_ID,
 237         },
 238         {
 239                 PCI_VENDOR_ID_DELL,
 240                 PCI_DEVICE_ID_PERC4_DI_EVERGLADES,
 241                 PCI_VENDOR_ID_DELL,
 242                 PCI_SUBSYS_ID_PERC4_DI_EVERGLADES,
 243         },
 244         {
 245                 PCI_VENDOR_ID_DELL,
 246                 PCI_DEVICE_ID_PERC4E_SI_BIGBEND,
 247                 PCI_VENDOR_ID_DELL,
 248                 PCI_SUBSYS_ID_PERC4E_SI_BIGBEND,
 249         },
 250         {
 251                 PCI_VENDOR_ID_DELL,
 252                 PCI_DEVICE_ID_PERC4E_DI_KOBUK,
 253                 PCI_VENDOR_ID_DELL,
 254                 PCI_SUBSYS_ID_PERC4E_DI_KOBUK,
 255         },
 256         {
 257                 PCI_VENDOR_ID_DELL,
 258                 PCI_DEVICE_ID_PERC4E_DI_CORVETTE,
 259                 PCI_VENDOR_ID_DELL,
 260                 PCI_SUBSYS_ID_PERC4E_DI_CORVETTE,
 261         },
 262         {
 263                 PCI_VENDOR_ID_DELL,
 264                 PCI_DEVICE_ID_PERC4E_DI_EXPEDITION,
 265                 PCI_VENDOR_ID_DELL,
 266                 PCI_SUBSYS_ID_PERC4E_DI_EXPEDITION,
 267         },
 268         {
 269                 PCI_VENDOR_ID_DELL,
 270                 PCI_DEVICE_ID_PERC4E_DI_GUADALUPE,
 271                 PCI_VENDOR_ID_DELL,
 272                 PCI_SUBSYS_ID_PERC4E_DI_GUADALUPE,
 273         },
 274         {
 275                 PCI_VENDOR_ID_LSI_LOGIC,
 276                 PCI_DEVICE_ID_DOBSON,
 277                 PCI_ANY_ID,
 278                 PCI_ANY_ID,
 279         },
 280         {
 281                 PCI_VENDOR_ID_AMI,
 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_AMI_MEGARAID3,
 289                 PCI_ANY_ID,
 290                 PCI_ANY_ID,
 291         },
 292         {
 293                 PCI_VENDOR_ID_LSI_LOGIC,
 294                 PCI_DEVICE_ID_LINDSAY,
 295                 PCI_ANY_ID,
 296                 PCI_ANY_ID,
 297         },
 298         {0}     /* Terminating entry */
 299 };
 300 MODULE_DEVICE_TABLE(pci, pci_id_table_g);
 301
 302
 303 static struct pci_driver megaraid_pci_driver_g = {
 304         .name           = "megaraid",
 305         .id_table       = pci_id_table_g,
 306         .probe          = megaraid_probe_one,
 307         .remove         = __devexit_p(megaraid_detach_one),
 308         .shutdown       = megaraid_mbox_shutdown,
 309 };
 310
 311
 312
 313 // definitions for the device attributes for exporting logical drive number
 314 // for a scsi address (Host, Channel, Id, Lun)
 315
 316 CLASS_DEVICE_ATTR(megaraid_mbox_app_hndl, S_IRUSR, megaraid_sysfs_show_app_hndl,
 317                 NULL);
 318
 319 // Host template initializer for megaraid mbox sysfs device attributes
 320 static struct class_device_attribute *megaraid_shost_attrs[] = {
 321         &class_device_attr_megaraid_mbox_app_hndl,
 322         NULL,
 323 };
 324
 325
 326 DEVICE_ATTR(megaraid_mbox_ld, S_IRUSR, megaraid_sysfs_show_ldnum, NULL);
 327
 328 // Host template initializer for megaraid mbox sysfs device attributes
 329 static struct device_attribute *megaraid_sdev_attrs[] = {
 330         &dev_attr_megaraid_mbox_ld,
 331         NULL,
 332 };
 333
 334 /**
 335  * megaraid_change_queue_depth - Change the device's queue depth
 336  * @sdev:       scsi device struct
 337  * @qdepth:     depth to set
 338  *
 339  * Return value:
 340  *      actual depth set
 341  */
 342 static int megaraid_change_queue_depth(struct scsi_device *sdev, int qdepth)
 343 {
 344         if (qdepth > MBOX_MAX_SCSI_CMDS)
 345                 qdepth = MBOX_MAX_SCSI_CMDS;
 346         scsi_adjust_queue_depth(sdev, 0, qdepth);
 347         return sdev->queue_depth;
 348 }
 349
 350 /*
 351  * Scsi host template for megaraid unified driver
 352  */
 353 static struct scsi_host_template megaraid_template_g = {
 354         .module                         = THIS_MODULE,
 355         .name                           = "LSI Logic MegaRAID driver",
 356         .proc_name                      = "megaraid",
 357         .queuecommand                   = megaraid_queue_command,
 358         .eh_abort_handler               = megaraid_abort_handler,
 359         .eh_device_reset_handler        = megaraid_reset_handler,
 360         .eh_bus_reset_handler           = megaraid_reset_handler,
 361         .eh_host_reset_handler          = megaraid_reset_handler,
 362         .change_queue_depth             = megaraid_change_queue_depth,
 363         .use_clustering                 = ENABLE_CLUSTERING,
 364         .sdev_attrs                     = megaraid_sdev_attrs,
 365         .shost_attrs                    = megaraid_shost_attrs,
 366 };
 367
 368
 369 /**
 370  * megaraid_init - module load hook
 371  *
 372  * We register ourselves as hotplug enabled module and let PCI subsystem
 373  * discover our adapters.
 374  */
 375 static int __init
 376 megaraid_init(void)
 377 {
 378         int     rval;
 379
 380         // Announce the driver version
 381         con_log(CL_ANN, (KERN_INFO "megaraid: %s %s\n", MEGARAID_VERSION,
 382                 MEGARAID_EXT_VERSION));
 383
 384         // check validity of module parameters
 385         if (megaraid_cmd_per_lun > MBOX_MAX_SCSI_CMDS) {
 386
 387                 con_log(CL_ANN, (KERN_WARNING
 388                         "megaraid mailbox: max commands per lun reset to %d\n",
 389                         MBOX_MAX_SCSI_CMDS));
 390
 391                 megaraid_cmd_per_lun = MBOX_MAX_SCSI_CMDS;
 392         }
 393
 394
 395         // register as a PCI hot-plug driver module
 396         rval = pci_register_driver(&megaraid_pci_driver_g);
 397         if (rval < 0) {
 398                 con_log(CL_ANN, (KERN_WARNING
 399                         "megaraid: could not register hotplug support.\n"));
 400         }
 401
 402         return rval;
 403 }
 404
 405
 406 /**
 407  * megaraid_exit - driver unload entry point
 408  *
 409  * We simply unwrap the megaraid_init routine here.
 410  */
 411 static void __exit
 412 megaraid_exit(void)
 413 {
 414         con_log(CL_DLEVEL1, (KERN_NOTICE "megaraid: unloading framework\n"));
 415
 416         // unregister as PCI hotplug driver
 417         pci_unregister_driver(&megaraid_pci_driver_g);
 418
 419         return;
 420 }
 421
 422
 423 /**
 424  * megaraid_probe_one - PCI hotplug entry point
 425  * @pdev        : handle to this controller's PCI configuration space
 426  * @id          : pci device id of the class of controllers
 427  *
 428  * This routine should be called whenever a new adapter is detected by the
 429  * PCI hotplug susbsytem.
 430  */
 431 static int __devinit
 432 megaraid_probe_one(struct pci_dev *pdev, const struct pci_device_id *id)
 433 {
 434         adapter_t       *adapter;
 435
 436
 437         // detected a new controller
 438         con_log(CL_ANN, (KERN_INFO
 439                 "megaraid: probe new device %#4.04x:%#4.04x:%#4.04x:%#4.04x: ",
 440                 pdev->vendor, pdev->device, pdev->subsystem_vendor,
 441                 pdev->subsystem_device));
 442
 443         con_log(CL_ANN, ("bus %d:slot %d:func %d\n", pdev->bus->number,
 444                 PCI_SLOT(pdev->devfn), PCI_FUNC(pdev->devfn)));
 445
 446         if (pci_enable_device(pdev)) {
 447                 con_log(CL_ANN, (KERN_WARNING
 448                                 "megaraid: pci_enable_device failed\n"));
 449
 450                 return -ENODEV;
 451         }
 452
 453         // Enable bus-mastering on this controller
 454         pci_set_master(pdev);
 455
 456         // Allocate the per driver initialization structure
 457         adapter = kmalloc(sizeof(adapter_t), GFP_KERNEL);
 458
 459         if (adapter == NULL) {
 460                 con_log(CL_ANN, (KERN_WARNING
 461                 "megaraid: out of memory, %s %d.\n", __FUNCTION__, __LINE__));
 462
 463                 goto out_probe_one;
 464         }
 465         memset(adapter, 0, sizeof(adapter_t));
 466
 467
 468         // set up PCI related soft state and other pre-known parameters
 469         adapter->unique_id      = pdev->bus->number << 8 | pdev->devfn;
 470         adapter->irq            = pdev->irq;
 471         adapter->pdev           = pdev;
 472
 473         atomic_set(&adapter->being_detached, 0);
 474
 475         // Setup the default DMA mask. This would be changed later on
 476         // depending on hardware capabilities
 477         if (pci_set_dma_mask(adapter->pdev, DMA_32BIT_MASK) != 0) {
 478
 479                 con_log(CL_ANN, (KERN_WARNING
 480                         "megaraid: pci_set_dma_mask failed:%d\n", __LINE__));
 481
 482                 goto out_free_adapter;
 483         }
 484
 485
 486         // Initialize the synchronization lock for kernel and LLD
 487         spin_lock_init(&adapter->lock);
 488
 489         // Initialize the command queues: the list of free SCBs and the list
 490         // of pending SCBs.
 491         INIT_LIST_HEAD(&adapter->kscb_pool);
 492         spin_lock_init(SCSI_FREE_LIST_LOCK(adapter));
 493
 494         INIT_LIST_HEAD(&adapter->pend_list);
 495         spin_lock_init(PENDING_LIST_LOCK(adapter));
 496
 497         INIT_LIST_HEAD(&adapter->completed_list);
 498         spin_lock_init(COMPLETED_LIST_LOCK(adapter));
 499
 500
 501         // Start the mailbox based controller
 502         if (megaraid_init_mbox(adapter) != 0) {
 503                 con_log(CL_ANN, (KERN_WARNING
 504                         "megaraid: maibox adapter did not initialize\n"));
 505
 506                 goto out_free_adapter;
 507         }
 508
 509         // Register with LSI Common Management Module
 510         if (megaraid_cmm_register(adapter) != 0) {
 511
 512                 con_log(CL_ANN, (KERN_WARNING
 513                 "megaraid: could not register with management module\n"));
 514
 515                 goto out_fini_mbox;
 516         }
 517
 518         // setup adapter handle in PCI soft state
 519         pci_set_drvdata(pdev, adapter);
 520
 521         // attach with scsi mid-layer
 522         if (megaraid_io_attach(adapter) != 0) {
 523
 524                 con_log(CL_ANN, (KERN_WARNING "megaraid: io attach failed\n"));
 525
 526                 goto out_cmm_unreg;
 527         }
 528
 529         return 0;
 530
 531 out_cmm_unreg:
 532         pci_set_drvdata(pdev, NULL);
 533         megaraid_cmm_unregister(adapter);
 534 out_fini_mbox:
 535         megaraid_fini_mbox(adapter);
 536 out_free_adapter:
 537         kfree(adapter);
 538 out_probe_one:
 539         pci_disable_device(pdev);
 540
 541         return -ENODEV;
 542 }
 543
 544
 545 /**
 546  * megaraid_detach_one - release framework resources and call LLD release routine
 547  * @pdev        : handle for our PCI cofiguration space
 548  *
 549  * This routine is called during driver unload. We free all the allocated
 550  * resources and call the corresponding LLD so that it can also release all
 551  * its resources.
 552  *
 553  * This routine is also called from the PCI hotplug system.
 554  */
 555 static void
 556 megaraid_detach_one(struct pci_dev *pdev)
 557 {
 558         adapter_t               *adapter;
 559         struct Scsi_Host        *host;
 560
 561
 562         // Start a rollback on this adapter
 563         adapter = pci_get_drvdata(pdev);
 564
 565         if (!adapter) {
 566                 con_log(CL_ANN, (KERN_CRIT
 567                 "megaraid: Invalid detach on %#4.04x:%#4.04x:%#4.04x:%#4.04x\n",
 568                         pdev->vendor, pdev->device, pdev->subsystem_vendor,
 569                         pdev->subsystem_device));
 570
 571                 return;
 572         }
 573         else {
 574                 con_log(CL_ANN, (KERN_NOTICE
 575                 "megaraid: detaching device %#4.04x:%#4.04x:%#4.04x:%#4.04x\n",
 576                         pdev->vendor, pdev->device, pdev->subsystem_vendor,
 577                         pdev->subsystem_device));
 578         }
 579
 580
 581         host = adapter->host;
 582
 583         // do not allow any more requests from the management module for this
 584         // adapter.
 585         // FIXME: How do we account for the request which might still be
 586         // pending with us?
 587         atomic_set(&adapter->being_detached, 1);
 588
 589         // detach from the IO sub-system
 590         megaraid_io_detach(adapter);
 591
 592         // reset the device state in the PCI structure. We check this
 593         // condition when we enter here. If the device state is NULL,
 594         // that would mean the device has already been removed
 595         pci_set_drvdata(pdev, NULL);
 596
 597         // Unregister from common management module
 598         //
 599         // FIXME: this must return success or failure for conditions if there
 600         // is a command pending with LLD or not.
 601         megaraid_cmm_unregister(adapter);
 602
 603         // finalize the mailbox based controller and release all resources
 604         megaraid_fini_mbox(adapter);
 605
 606         kfree(adapter);
 607
 608         scsi_host_put(host);
 609
 610         pci_disable_device(pdev);
 611
 612         return;
 613 }
 614
 615
 616 /**
 617  * megaraid_mbox_shutdown - PCI shutdown for megaraid HBA
 618  * @pdev                : generic driver model device
 619  *
 620  * Shutdown notification, perform flush cache.
 621  */
 622 static void
 623 megaraid_mbox_shutdown(struct pci_dev *pdev)
 624 {
 625         adapter_t               *adapter = pci_get_drvdata(pdev);
 626         static int              counter;
 627
 628         if (!adapter) {
 629                 con_log(CL_ANN, (KERN_WARNING
 630                         "megaraid: null device in shutdown\n"));
 631                 return;
 632         }
 633
 634         // flush caches now
 635         con_log(CL_ANN, (KERN_INFO "megaraid: flushing adapter %d...",
 636                 counter++));
 637
 638         megaraid_mbox_flush_cache(adapter);
 639
 640         con_log(CL_ANN, ("done\n"));
 641 }
 642
 643
 644 /**
 645  * megaraid_io_attach - attach a device with the IO subsystem
 646  * @adapter             : controller's soft state
 647  *
 648  * Attach this device with the IO subsystem.
 649  */
 650 static int
 651 megaraid_io_attach(adapter_t *adapter)
 652 {
 653         struct Scsi_Host        *host;
 654
 655         // Initialize SCSI Host structure
 656         host = scsi_host_alloc(&megaraid_template_g, 8);
 657         if (!host) {
 658                 con_log(CL_ANN, (KERN_WARNING
 659                         "megaraid mbox: scsi_register failed\n"));
 660
 661                 return -1;
 662         }
 663
 664         SCSIHOST2ADAP(host)     = (caddr_t)adapter;
 665         adapter->host           = host;
 666
 667         host->irq               = adapter->irq;
 668         host->unique_id         = adapter->unique_id;
 669         host->can_queue         = adapter->max_cmds;
 670         host->this_id           = adapter->init_id;
 671         host->sg_tablesize      = adapter->sglen;
 672         host->max_sectors       = adapter->max_sectors;
 673         host->cmd_per_lun       = adapter->cmd_per_lun;
 674         host->max_channel       = adapter->max_channel;
 675         host->max_id            = adapter->max_target;
 676         host->max_lun           = adapter->max_lun;
 677
 678
 679         // notify mid-layer about the new controller
 680         if (scsi_add_host(host, &adapter->pdev->dev)) {
 681
 682                 con_log(CL_ANN, (KERN_WARNING
 683                         "megaraid mbox: scsi_add_host failed\n"));
 684
 685                 scsi_host_put(host);
 686
 687                 return -1;
 688         }
 689
 690         scsi_scan_host(host);
 691
 692         return 0;
 693 }
 694
 695
 696 /**
 697  * megaraid_io_detach - detach a device from the IO subsystem
 698  * @adapter             : controller's soft state
 699  *
 700  * Detach this device from the IO subsystem.
 701  */
 702 static void
 703 megaraid_io_detach(adapter_t *adapter)
 704 {
 705         struct Scsi_Host        *host;
 706
 707         con_log(CL_DLEVEL1, (KERN_INFO "megaraid: io detach\n"));
 708
 709         host = adapter->host;
 710
 711         scsi_remove_host(host);
 712
 713         return;
 714 }
 715
 716
 717 /*
 718  * START: Mailbox Low Level Driver
 719  *
 720  * This is section specific to the single mailbox based controllers
 721  */
 722
 723 /**
 724  * megaraid_init_mbox - initialize controller
 725  * @adapter             : our soft state
 726  *
 727  * - Allocate 16-byte aligned mailbox memory for firmware handshake
 728  * - Allocate controller's memory resources
 729  * - Find out all initialization data
 730  * - Allocate memory required for all the commands
 731  * - Use internal library of FW routines, build up complete soft state
 732  */
 733 static int __devinit
 734 megaraid_init_mbox(adapter_t *adapter)
 735 {
 736         struct pci_dev          *pdev;
 737         mraid_device_t          *raid_dev;
 738         int                     i;
 739         uint32_t                magic64;
 740
 741
 742         adapter->ito    = MBOX_TIMEOUT;
 743         pdev            = adapter->pdev;
 744
 745         /*
 746          * Allocate and initialize the init data structure for mailbox
 747          * controllers
 748          */
 749         raid_dev = kmalloc(sizeof(mraid_device_t), GFP_KERNEL);
 750         if (raid_dev == NULL) return -1;
 751
 752         memset(raid_dev, 0, sizeof(mraid_device_t));
 753
 754         /*
 755          * Attach the adapter soft state to raid device soft state
 756          */
 757         adapter->raid_device    = (caddr_t)raid_dev;
 758         raid_dev->fast_load     = megaraid_fast_load;
 759
 760
 761         // our baseport
 762         raid_dev->baseport = pci_resource_start(pdev, 0);
 763
 764         if (pci_request_regions(pdev, "MegaRAID: LSI Logic Corporation") != 0) {
 765
 766                 con_log(CL_ANN, (KERN_WARNING
 767                                 "megaraid: mem region busy\n"));
 768
 769                 goto out_free_raid_dev;
 770         }
 771
 772         raid_dev->baseaddr = ioremap_nocache(raid_dev->baseport, 128);
 773
 774         if (!raid_dev->baseaddr) {
 775
 776                 con_log(CL_ANN, (KERN_WARNING
 777                         "megaraid: could not map hba memory\n") );
 778
 779                 goto out_release_regions;
 780         }
 781
 782         /* initialize the mutual exclusion lock for the mailbox */
 783         spin_lock_init(&raid_dev->mailbox_lock);
 784
 785         /* allocate memory required for commands */
 786         if (megaraid_alloc_cmd_packets(adapter) != 0)
 787                 goto out_iounmap;
 788
 789         /*
 790          * Issue SYNC cmd to flush the pending cmds in the adapter
 791          * and initialize its internal state
 792          */
 793
 794         if (megaraid_mbox_fire_sync_cmd(adapter))
 795                 con_log(CL_ANN, ("megaraid: sync cmd failed\n"));
 796
 797         /*
 798          * Setup the rest of the soft state using the library of
 799          * FW routines
 800          */
 801
 802         /* request IRQ and register the interrupt service routine */
 803         if (request_irq(adapter->irq, megaraid_isr, IRQF_SHARED, "megaraid",
 804                 adapter)) {
 805
 806                 con_log(CL_ANN, (KERN_WARNING
 807                         "megaraid: Couldn't register IRQ %d!\n", adapter->irq));
 808                 goto out_alloc_cmds;
 809
 810         }
 811
 812         // Product info
 813         if (megaraid_mbox_product_info(adapter) != 0)
 814                 goto out_free_irq;
 815
 816         // Do we support extended CDBs
 817         adapter->max_cdb_sz = 10;
 818         if (megaraid_mbox_extended_cdb(adapter) == 0) {
 819                 adapter->max_cdb_sz = 16;
 820         }
 821
 822         /*
 823          * Do we support cluster environment, if we do, what is the initiator
 824          * id.
 825          * NOTE: In a non-cluster aware firmware environment, the LLD should
 826          * return 7 as initiator id.
 827          */
 828         adapter->ha             = 0;
 829         adapter->init_id        = -1;
 830         if (megaraid_mbox_support_ha(adapter, &adapter->init_id) == 0) {
 831                 adapter->ha = 1;
 832         }
 833
 834         /*
 835          * Prepare the device ids array to have the mapping between the kernel
 836          * device address and megaraid device address.
 837          * We export the physical devices on their actual addresses. The
 838          * logical drives are exported on a virtual SCSI channel
 839          */
 840         megaraid_mbox_setup_device_map(adapter);
 841
 842         // If the firmware supports random deletion, update the device id map
 843         if (megaraid_mbox_support_random_del(adapter)) {
 844
 845                 // Change the logical drives numbers in device_ids array one
 846                 // slot in device_ids is reserved for target id, that's why
 847                 // "<=" below
 848                 for (i = 0; i <= MAX_LOGICAL_DRIVES_40LD; i++) {
 849                         adapter->device_ids[adapter->max_channel][i] += 0x80;
 850                 }
 851                 adapter->device_ids[adapter->max_channel][adapter->init_id] =
 852                         0xFF;
 853
 854                 raid_dev->random_del_supported = 1;
 855         }
 856
 857         /*
 858          * find out the maximum number of scatter-gather elements supported by
 859          * this firmware
 860          */
 861         adapter->sglen = megaraid_mbox_get_max_sg(adapter);
 862
 863         // enumerate RAID and SCSI channels so that all devices on SCSI
 864         // channels can later be exported, including disk devices
 865         megaraid_mbox_enum_raid_scsi(adapter);
 866
 867         /*
 868          * Other parameters required by upper layer
 869          *
 870          * maximum number of sectors per IO command
 871          */
 872         adapter->max_sectors = megaraid_max_sectors;
 873
 874         /*
 875          * number of queued commands per LUN.
 876          */
 877         adapter->cmd_per_lun = megaraid_cmd_per_lun;
 878
 879         /*
 880          * Allocate resources required to issue FW calls, when sysfs is
 881          * accessed
 882          */
 883         if (megaraid_sysfs_alloc_resources(adapter) != 0)
 884                 goto out_free_irq;
 885
 886         // Set the DMA mask to 64-bit. All supported controllers as capable of
 887         // DMA in this range
 888         pci_read_config_dword(adapter->pdev, PCI_CONF_AMISIG64, &magic64);
 889
 890         if (((magic64 == HBA_SIGNATURE_64_BIT) &&
 891                 ((adapter->pdev->subsystem_device !=
 892                 PCI_SUBSYS_ID_MEGARAID_SATA_150_6) &&
 893                 (adapter->pdev->subsystem_device !=
 894                 PCI_SUBSYS_ID_MEGARAID_SATA_150_4))) ||
 895                 (adapter->pdev->vendor == PCI_VENDOR_ID_LSI_LOGIC &&
 896                 adapter->pdev->device == PCI_DEVICE_ID_VERDE) ||
 897                 (adapter->pdev->vendor == PCI_VENDOR_ID_LSI_LOGIC &&
 898                 adapter->pdev->device == PCI_DEVICE_ID_DOBSON) ||
 899                 (adapter->pdev->vendor == PCI_VENDOR_ID_LSI_LOGIC &&
 900                 adapter->pdev->device == PCI_DEVICE_ID_LINDSAY) ||
 901                 (adapter->pdev->vendor == PCI_VENDOR_ID_DELL &&
 902                 adapter->pdev->device == PCI_DEVICE_ID_PERC4_DI_EVERGLADES) ||
 903                 (adapter->pdev->vendor == PCI_VENDOR_ID_DELL &&
 904                 adapter->pdev->device == PCI_DEVICE_ID_PERC4E_DI_KOBUK)) {
 905                 if (pci_set_dma_mask(adapter->pdev, DMA_64BIT_MASK)) {
 906                         con_log(CL_ANN, (KERN_WARNING
 907                                 "megaraid: DMA mask for 64-bit failed\n"));
 908
 909                         if (pci_set_dma_mask (adapter->pdev, DMA_32BIT_MASK)) {
 910                                 con_log(CL_ANN, (KERN_WARNING
 911                                         "megaraid: 32-bit DMA mask failed\n"));
 912                                 goto out_free_sysfs_res;
 913                         }
 914                 }
 915         }
 916
 917         // setup tasklet for DPC
 918         tasklet_init(&adapter->dpc_h, megaraid_mbox_dpc,
 919                         (unsigned long)adapter);
 920
 921         con_log(CL_DLEVEL1, (KERN_INFO
 922                 "megaraid mbox hba successfully initialized\n"));
 923
 924         return 0;
 925
 926 out_free_sysfs_res:
 927         megaraid_sysfs_free_resources(adapter);
 928 out_free_irq:
 929         free_irq(adapter->irq, adapter);
 930 out_alloc_cmds:
 931         megaraid_free_cmd_packets(adapter);
 932 out_iounmap:
 933         iounmap(raid_dev->baseaddr);
 934 out_release_regions:
 935         pci_release_regions(pdev);
 936 out_free_raid_dev:
 937         kfree(raid_dev);
 938
 939         return -1;
 940 }
 941
 942
 943 /**
 944  * megaraid_fini_mbox - undo controller initialization
 945  * @adapter             : our soft state
 946  */
 947 static void
 948 megaraid_fini_mbox(adapter_t *adapter)
 949 {
 950         mraid_device_t *raid_dev = ADAP2RAIDDEV(adapter);
 951
 952         // flush all caches
 953         megaraid_mbox_flush_cache(adapter);
 954
 955         tasklet_kill(&adapter->dpc_h);
 956
 957         megaraid_sysfs_free_resources(adapter);
 958
 959         megaraid_free_cmd_packets(adapter);
 960
 961         free_irq(adapter->irq, adapter);
 962
 963         iounmap(raid_dev->baseaddr);
 964
 965         pci_release_regions(adapter->pdev);
 966
 967         kfree(raid_dev);
 968
 969         return;
 970 }
 971
 972
 973 /**
 974  * megaraid_alloc_cmd_packets - allocate shared mailbox
 975  * @adapter             : soft state of the raid controller
 976  *
 977  * Allocate and align the shared mailbox. This maibox is used to issue
 978  * all the commands. For IO based controllers, the mailbox is also regsitered
 979  * with the FW. Allocate memory for all commands as well.
 980  * This is our big allocator.
 981  */
 982 static int
 983 megaraid_alloc_cmd_packets(adapter_t *adapter)
 984 {
 985         mraid_device_t          *raid_dev = ADAP2RAIDDEV(adapter);
 986         struct pci_dev          *pdev;
 987         unsigned long           align;
 988         scb_t                   *scb;
 989         mbox_ccb_t              *ccb;
 990         struct mraid_pci_blk    *epthru_pci_blk;
 991         struct mraid_pci_blk    *sg_pci_blk;
 992         struct mraid_pci_blk    *mbox_pci_blk;
 993         int                     i;
 994
 995         pdev = adapter->pdev;
 996
 997         /*
 998          * Setup the mailbox
 999          * Allocate the common 16-byte aligned memory for the handshake
1000          * mailbox.
1001          */
1002         raid_dev->una_mbox64 = pci_alloc_consistent(adapter->pdev,
1003                         sizeof(mbox64_t), &raid_dev->una_mbox64_dma);
1004
1005         if (!raid_dev->una_mbox64) {
1006                 con_log(CL_ANN, (KERN_WARNING
1007                         "megaraid: out of memory, %s %d\n", __FUNCTION__,
1008                         __LINE__));
1009                 return -1;
1010         }
1011         memset(raid_dev->una_mbox64, 0, sizeof(mbox64_t));
1012
1013         /*
1014          * Align the mailbox at 16-byte boundary
1015          */
1016         raid_dev->mbox  = &raid_dev->una_mbox64->mbox32;
1017
1018         raid_dev->mbox  = (mbox_t *)((((unsigned long)raid_dev->mbox) + 15) &
1019                                 (~0UL ^ 0xFUL));
1020
1021         raid_dev->mbox64 = (mbox64_t *)(((unsigned long)raid_dev->mbox) - 8);
1022
1023         align = ((void *)raid_dev->mbox -
1024                         ((void *)&raid_dev->una_mbox64->mbox32));
1025
1026         raid_dev->mbox_dma = (unsigned long)raid_dev->una_mbox64_dma + 8 +
1027                         align;
1028
1029         // Allocate memory for commands issued internally
1030         adapter->ibuf = pci_alloc_consistent(pdev, MBOX_IBUF_SIZE,
1031                                 &adapter->ibuf_dma_h);
1032         if (!adapter->ibuf) {
1033
1034                 con_log(CL_ANN, (KERN_WARNING
1035                         "megaraid: out of memory, %s %d\n", __FUNCTION__,
1036                         __LINE__));
1037
1038                 goto out_free_common_mbox;
1039         }
1040         memset(adapter->ibuf, 0, MBOX_IBUF_SIZE);
1041
1042         // Allocate memory for our SCSI Command Blocks and their associated
1043         // memory
1044
1045         /*
1046          * Allocate memory for the base list of scb. Later allocate memory for
1047          * CCBs and embedded components of each CCB and point the pointers in
1048          * scb to the allocated components
1049          * NOTE: The code to allocate SCB will be duplicated in all the LLD
1050          * since the calling routine does not yet know the number of available
1051          * commands.
1052          */
1053         adapter->kscb_list = kmalloc(sizeof(scb_t) * MBOX_MAX_SCSI_CMDS,
1054                         GFP_KERNEL);
1055
1056         if (adapter->kscb_list == NULL) {
1057                 con_log(CL_ANN, (KERN_WARNING
1058                         "megaraid: out of memory, %s %d\n", __FUNCTION__,
1059                         __LINE__));
1060                 goto out_free_ibuf;
1061         }
1062         memset(adapter->kscb_list, 0, sizeof(scb_t) * MBOX_MAX_SCSI_CMDS);
1063
1064         // memory allocation for our command packets
1065         if (megaraid_mbox_setup_dma_pools(adapter) != 0) {
1066                 con_log(CL_ANN, (KERN_WARNING
1067                         "megaraid: out of memory, %s %d\n", __FUNCTION__,
1068                         __LINE__));
1069                 goto out_free_scb_list;
1070         }
1071
1072         // Adjust the scb pointers and link in the free pool
1073         epthru_pci_blk  = raid_dev->epthru_pool;
1074         sg_pci_blk      = raid_dev->sg_pool;
1075         mbox_pci_blk    = raid_dev->mbox_pool;
1076
1077         for (i = 0; i < MBOX_MAX_SCSI_CMDS; i++) {
1078                 scb                     = adapter->kscb_list + i;
1079                 ccb                     = raid_dev->ccb_list + i;
1080
1081                 ccb->mbox       = (mbox_t *)(mbox_pci_blk[i].vaddr + 16);
1082                 ccb->raw_mbox   = (uint8_t *)ccb->mbox;
1083                 ccb->mbox64     = (mbox64_t *)(mbox_pci_blk[i].vaddr + 8);
1084                 ccb->mbox_dma_h = (unsigned long)mbox_pci_blk[i].dma_addr + 16;
1085
1086                 // make sure the mailbox is aligned properly
1087                 if (ccb->mbox_dma_h & 0x0F) {
1088                         con_log(CL_ANN, (KERN_CRIT
1089                                 "megaraid mbox: not aligned on 16-bytes\n"));
1090
1091                         goto out_teardown_dma_pools;
1092                 }
1093
1094                 ccb->epthru             = (mraid_epassthru_t *)
1095                                                 epthru_pci_blk[i].vaddr;
1096                 ccb->epthru_dma_h       = epthru_pci_blk[i].dma_addr;
1097                 ccb->pthru              = (mraid_passthru_t *)ccb->epthru;
1098                 ccb->pthru_dma_h        = ccb->epthru_dma_h;
1099
1100
1101                 ccb->sgl64              = (mbox_sgl64 *)sg_pci_blk[i].vaddr;
1102                 ccb->sgl_dma_h          = sg_pci_blk[i].dma_addr;
1103                 ccb->sgl32              = (mbox_sgl32 *)ccb->sgl64;
1104
1105                 scb->ccb                = (caddr_t)ccb;
1106                 scb->gp                 = 0;
1107
1108                 scb->sno                = i;    // command index
1109
1110                 scb->scp                = NULL;
1111                 scb->state              = SCB_FREE;
1112                 scb->dma_direction      = PCI_DMA_NONE;
1113                 scb->dma_type           = MRAID_DMA_NONE;
1114                 scb->dev_channel        = -1;
1115                 scb->dev_target         = -1;
1116
1117                 // put scb in the free pool
1118                 list_add_tail(&scb->list, &adapter->kscb_pool);
1119         }
1120
1121         return 0;
1122
1123 out_teardown_dma_pools:
1124         megaraid_mbox_teardown_dma_pools(adapter);
1125 out_free_scb_list:
1126         kfree(adapter->kscb_list);
1127 out_free_ibuf:
1128         pci_free_consistent(pdev, MBOX_IBUF_SIZE, (void *)adapter->ibuf,
1129                 adapter->ibuf_dma_h);
1130 out_free_common_mbox:
1131         pci_free_consistent(adapter->pdev, sizeof(mbox64_t),
1132                 (caddr_t)raid_dev->una_mbox64, raid_dev->una_mbox64_dma);
1133
1134         return -1;
1135 }
1136
1137
1138 /**
1139  * megaraid_free_cmd_packets - free memory
1140  * @adapter             : soft state of the raid controller
1141  *
1142  * Release memory resources allocated for commands.
1143  */
1144 static void
1145 megaraid_free_cmd_packets(adapter_t *adapter)
1146 {
1147         mraid_device_t *raid_dev = ADAP2RAIDDEV(adapter);
1148
1149         megaraid_mbox_teardown_dma_pools(adapter);
1150
1151         kfree(adapter->kscb_list);
1152
1153         pci_free_consistent(adapter->pdev, MBOX_IBUF_SIZE,
1154                 (void *)adapter->ibuf, adapter->ibuf_dma_h);
1155
1156         pci_free_consistent(adapter->pdev, sizeof(mbox64_t),
1157                 (caddr_t)raid_dev->una_mbox64, raid_dev->una_mbox64_dma);
1158         return;
1159 }
1160
1161
1162 /**
1163  * megaraid_mbox_setup_dma_pools - setup dma pool for command packets
1164  * @adapter             : HBA soft state
1165  *
1166  * Setup the dma pools for mailbox, passthru and extended passthru structures,
1167  * and scatter-gather lists.
1168  */
1169 static int
1170 megaraid_mbox_setup_dma_pools(adapter_t *adapter)
1171 {
1172         mraid_device_t          *raid_dev = ADAP2RAIDDEV(adapter);
1173         struct mraid_pci_blk    *epthru_pci_blk;
1174         struct mraid_pci_blk    *sg_pci_blk;
1175         struct mraid_pci_blk    *mbox_pci_blk;
1176         int                     i;
1177
1178
1179
1180         // Allocate memory for 16-bytes aligned mailboxes
1181         raid_dev->mbox_pool_handle = pci_pool_create("megaraid mbox pool",
1182                                                 adapter->pdev,
1183                                                 sizeof(mbox64_t) + 16,
1184                                                 16, 0);
1185
1186         if (raid_dev->mbox_pool_handle == NULL) {
1187                 goto fail_setup_dma_pool;
1188         }
1189
1190         mbox_pci_blk = raid_dev->mbox_pool;
1191         for (i = 0; i < MBOX_MAX_SCSI_CMDS; i++) {
1192                 mbox_pci_blk[i].vaddr = pci_pool_alloc(
1193                                                 raid_dev->mbox_pool_handle,
1194                                                 GFP_KERNEL,
1195                                                 &mbox_pci_blk[i].dma_addr);
1196                 if (!mbox_pci_blk[i].vaddr) {
1197                         goto fail_setup_dma_pool;
1198                 }
1199         }
1200
1201         /*
1202          * Allocate memory for each embedded passthru strucuture pointer
1203          * Request for a 128 bytes aligned structure for each passthru command
1204          * structure
1205          * Since passthru and extended passthru commands are exclusive, they
1206          * share common memory pool. Passthru structures piggyback on memory
1207          * allocted to extended passthru since passthru is smaller of the two
1208          */
1209         raid_dev->epthru_pool_handle = pci_pool_create("megaraid mbox pthru",
1210                         adapter->pdev, sizeof(mraid_epassthru_t), 128, 0);
1211
1212         if (raid_dev->epthru_pool_handle == NULL) {
1213                 goto fail_setup_dma_pool;
1214         }
1215
1216         epthru_pci_blk = raid_dev->epthru_pool;
1217         for (i = 0; i < MBOX_MAX_SCSI_CMDS; i++) {
1218                 epthru_pci_blk[i].vaddr = pci_pool_alloc(
1219                                                 raid_dev->epthru_pool_handle,
1220                                                 GFP_KERNEL,
1221                                                 &epthru_pci_blk[i].dma_addr);
1222                 if (!epthru_pci_blk[i].vaddr) {
1223                         goto fail_setup_dma_pool;
1224                 }
1225         }
1226
1227
1228         // Allocate memory for each scatter-gather list. Request for 512 bytes
1229         // alignment for each sg list
1230         raid_dev->sg_pool_handle = pci_pool_create("megaraid mbox sg",
1231                                         adapter->pdev,
1232                                         sizeof(mbox_sgl64) * MBOX_MAX_SG_SIZE,
1233                                         512, 0);
1234
1235         if (raid_dev->sg_pool_handle == NULL) {
1236                 goto fail_setup_dma_pool;
1237         }
1238
1239         sg_pci_blk = raid_dev->sg_pool;
1240         for (i = 0; i < MBOX_MAX_SCSI_CMDS; i++) {
1241                 sg_pci_blk[i].vaddr = pci_pool_alloc(
1242                                                 raid_dev->sg_pool_handle,
1243                                                 GFP_KERNEL,
1244                                                 &sg_pci_blk[i].dma_addr);
1245                 if (!sg_pci_blk[i].vaddr) {
1246                         goto fail_setup_dma_pool;
1247                 }
1248         }
1249
1250         return 0;
1251
1252 fail_setup_dma_pool:
1253         megaraid_mbox_teardown_dma_pools(adapter);
1254         return -1;
1255 }
1256
1257
1258 /**
1259  * megaraid_mbox_teardown_dma_pools - teardown dma pools for command packets
1260  * @adapter             : HBA soft state
1261  *
1262  * Teardown the dma pool for mailbox, passthru and extended passthru
1263  * structures, and scatter-gather lists.
1264  */
1265 static void
1266 megaraid_mbox_teardown_dma_pools(adapter_t *adapter)
1267 {
1268         mraid_device_t          *raid_dev = ADAP2RAIDDEV(adapter);
1269         struct mraid_pci_blk    *epthru_pci_blk;
1270         struct mraid_pci_blk    *sg_pci_blk;
1271         struct mraid_pci_blk    *mbox_pci_blk;
1272         int                     i;
1273
1274
1275         sg_pci_blk = raid_dev->sg_pool;
1276         for (i = 0; i < MBOX_MAX_SCSI_CMDS && sg_pci_blk[i].vaddr; i++) {
1277                 pci_pool_free(raid_dev->sg_pool_handle, sg_pci_blk[i].vaddr,
1278                         sg_pci_blk[i].dma_addr);
1279         }
1280         if (raid_dev->sg_pool_handle)
1281                 pci_pool_destroy(raid_dev->sg_pool_handle);
1282
1283
1284         epthru_pci_blk = raid_dev->epthru_pool;
1285         for (i = 0; i < MBOX_MAX_SCSI_CMDS && epthru_pci_blk[i].vaddr; i++) {
1286                 pci_pool_free(raid_dev->epthru_pool_handle,
1287                         epthru_pci_blk[i].vaddr, epthru_pci_blk[i].dma_addr);
1288         }
1289         if (raid_dev->epthru_pool_handle)
1290                 pci_pool_destroy(raid_dev->epthru_pool_handle);
1291
1292
1293         mbox_pci_blk = raid_dev->mbox_pool;
1294         for (i = 0; i < MBOX_MAX_SCSI_CMDS && mbox_pci_blk[i].vaddr; i++) {
1295                 pci_pool_free(raid_dev->mbox_pool_handle,
1296                         mbox_pci_blk[i].vaddr, mbox_pci_blk[i].dma_addr);
1297         }
1298         if (raid_dev->mbox_pool_handle)
1299                 pci_pool_destroy(raid_dev->mbox_pool_handle);
1300
1301         return;
1302 }
1303
1304
1305 /**
1306  * megaraid_alloc_scb - detach and return a scb from the free list
1307  * @adapter     : controller's soft state
1308  * @scp         : pointer to the scsi command to be executed
1309  *
1310  * Return the scb from the head of the free list. %NULL if there are none
1311  * available.
1312  */
1313 static scb_t *
1314 megaraid_alloc_scb(adapter_t *adapter, struct scsi_cmnd *scp)
1315 {
1316         struct list_head        *head = &adapter->kscb_pool;
1317         scb_t                   *scb = NULL;
1318         unsigned long           flags;
1319
1320         // detach scb from free pool
1321         spin_lock_irqsave(SCSI_FREE_LIST_LOCK(adapter), flags);
1322
1323         if (list_empty(head)) {
1324                 spin_unlock_irqrestore(SCSI_FREE_LIST_LOCK(adapter), flags);
1325                 return NULL;
1326         }
1327
1328         scb = list_entry(head->next, scb_t, list);
1329         list_del_init(&scb->list);
1330
1331         spin_unlock_irqrestore(SCSI_FREE_LIST_LOCK(adapter), flags);
1332
1333         scb->state      = SCB_ACTIVE;
1334         scb->scp        = scp;
1335         scb->dma_type   = MRAID_DMA_NONE;
1336
1337         return scb;
1338 }
1339
1340
1341 /**
1342  * megaraid_dealloc_scb - return the scb to the free pool
1343  * @adapter     : controller's soft state
1344  * @scb         : scb to be freed
1345  *
1346  * Return the scb back to the free list of scbs. The caller must 'flush' the
1347  * SCB before calling us. E.g., performing pci_unamp and/or pci_sync etc.
1348  * NOTE NOTE: Make sure the scb is not on any list before calling this
1349  * routine.
1350  */
1351 static inline void
1352 megaraid_dealloc_scb(adapter_t *adapter, scb_t *scb)
1353 {
1354         unsigned long           flags;
1355
1356         // put scb in the free pool
1357         scb->state      = SCB_FREE;
1358         scb->scp        = NULL;
1359         spin_lock_irqsave(SCSI_FREE_LIST_LOCK(adapter), flags);
1360
1361         list_add(&scb->list, &adapter->kscb_pool);
1362
1363         spin_unlock_irqrestore(SCSI_FREE_LIST_LOCK(adapter), flags);
1364
1365         return;
1366 }
1367
1368
1369 /**
1370  * megaraid_mbox_mksgl - make the scatter-gather list
1371  * @adapter     : controller's soft state
1372  * @scb         : scsi control block
1373  *
1374  * Prepare the scatter-gather list.
1375  */
1376 static int
1377 megaraid_mbox_mksgl(adapter_t *adapter, scb_t *scb)
1378 {
1379         struct scatterlist      *sgl;
1380         mbox_ccb_t              *ccb;
1381         struct page             *page;
1382         unsigned long           offset;
1383         struct scsi_cmnd        *scp;
1384         int                     sgcnt;
1385         int                     i;
1386
1387
1388         scp     = scb->scp;
1389         ccb     = (mbox_ccb_t *)scb->ccb;
1390
1391         // no mapping required if no data to be transferred
1392         if (!scp->request_buffer || !scp->request_bufflen)
1393                 return 0;
1394
1395         if (!scp->use_sg) {     /* scatter-gather list not used */
1396
1397                 page = virt_to_page(scp->request_buffer);
1398
1399                 offset = ((unsigned long)scp->request_buffer & ~PAGE_MASK);
1400
1401                 ccb->buf_dma_h = pci_map_page(adapter->pdev, page, offset,
1402                                                   scp->request_bufflen,
1403                                                   scb->dma_direction);
1404                 scb->dma_type = MRAID_DMA_WBUF;
1405
1406                 /*
1407                  * We need to handle special 64-bit commands that need a
1408                  * minimum of 1 SG
1409                  */
1410                 sgcnt = 1;
1411                 ccb->sgl64[0].address   = ccb->buf_dma_h;
1412                 ccb->sgl64[0].length    = scp->request_bufflen;
1413
1414                 return sgcnt;
1415         }
1416
1417         sgl = (struct scatterlist *)scp->request_buffer;
1418
1419         // The number of sg elements returned must not exceed our limit
1420         sgcnt = pci_map_sg(adapter->pdev, sgl, scp->use_sg,
1421                         scb->dma_direction);
1422
1423         if (sgcnt > adapter->sglen) {
1424                 con_log(CL_ANN, (KERN_CRIT
1425                         "megaraid critical: too many sg elements:%d\n",
1426                         sgcnt));
1427                 BUG();
1428         }
1429
1430         scb->dma_type = MRAID_DMA_WSG;
1431
1432         for (i = 0; i < sgcnt; i++, sgl++) {
1433                 ccb->sgl64[i].address   = sg_dma_address(sgl);
1434                 ccb->sgl64[i].length    = sg_dma_len(sgl);
1435         }
1436
1437         // Return count of SG nodes
1438         return sgcnt;
1439 }
1440
1441
1442 /**
1443  * mbox_post_cmd - issue a mailbox command
1444  * @adapter     : controller's soft state
1445  * @scb         : command to be issued
1446  *
1447  * Post the command to the controller if mailbox is available.
1448  */
1449 static int
1450 mbox_post_cmd(adapter_t *adapter, scb_t *scb)
1451 {
1452         mraid_device_t  *raid_dev = ADAP2RAIDDEV(adapter);
1453         mbox64_t        *mbox64;
1454         mbox_t          *mbox;
1455         mbox_ccb_t      *ccb;
1456         unsigned long   flags;
1457         unsigned int    i = 0;
1458
1459
1460         ccb     = (mbox_ccb_t *)scb->ccb;
1461         mbox    = raid_dev->mbox;
1462         mbox64  = raid_dev->mbox64;
1463
1464         /*
1465          * Check for busy mailbox. If it is, return failure - the caller
1466          * should retry later.
1467          */
1468         spin_lock_irqsave(MAILBOX_LOCK(raid_dev), flags);
1469
1470         if (unlikely(mbox->busy)) {
1471                 do {
1472                         udelay(1);
1473                         i++;
1474                         rmb();
1475                 } while(mbox->busy && (i < max_mbox_busy_wait));
1476
1477                 if (mbox->busy) {
1478
1479                         spin_unlock_irqrestore(MAILBOX_LOCK(raid_dev), flags);
1480
1481                         return -1;
1482                 }
1483         }
1484
1485
1486         // Copy this command's mailbox data into "adapter's" mailbox
1487         memcpy((caddr_t)mbox64, (caddr_t)ccb->mbox64, 22);
1488         mbox->cmdid = scb->sno;
1489
1490         adapter->outstanding_cmds++;
1491
1492         if (scb->dma_direction == PCI_DMA_TODEVICE) {
1493                 if (!scb->scp->use_sg) {        // sg list not used
1494                         pci_dma_sync_single_for_device(adapter->pdev,
1495                                         ccb->buf_dma_h,
1496                                         scb->scp->request_bufflen,
1497                                         PCI_DMA_TODEVICE);
1498                 }
1499                 else {
1500                         pci_dma_sync_sg_for_device(adapter->pdev,
1501                                 scb->scp->request_buffer,
1502                                 scb->scp->use_sg, PCI_DMA_TODEVICE);
1503                 }
1504         }
1505
1506         mbox->busy      = 1;    // Set busy
1507         mbox->poll      = 0;
1508         mbox->ack       = 0;
1509         wmb();
1510
1511         WRINDOOR(raid_dev, raid_dev->mbox_dma | 0x1);
1512
1513         spin_unlock_irqrestore(MAILBOX_LOCK(raid_dev), flags);
1514
1515         return 0;
1516 }
1517
1518
1519 /**
1520  * megaraid_queue_command - generic queue entry point for all LLDs
1521  * @scp         : pointer to the scsi command to be executed
1522  * @done        : callback routine to be called after the cmd has be completed
1523  *
1524  * Queue entry point for mailbox based controllers.
1525  */
1526 static int
1527 megaraid_queue_command(struct scsi_cmnd *scp, void (*done)(struct scsi_cmnd *))
1528 {
1529         adapter_t       *adapter;
1530         scb_t           *scb;
1531         int             if_busy;
1532
1533         adapter         = SCP2ADAPTER(scp);
1534         scp->scsi_done  = done;
1535         scp->result     = 0;
1536
1537         /*
1538          * Allocate and build a SCB request
1539          * if_busy flag will be set if megaraid_mbox_build_cmd() command could
1540          * not allocate scb. We will return non-zero status in that case.
1541          * NOTE: scb can be null even though certain commands completed
1542          * successfully, e.g., MODE_SENSE and TEST_UNIT_READY, it would
1543          * return 0 in that case, and we would do the callback right away.
1544          */
1545         if_busy = 0;
1546         scb = megaraid_mbox_build_cmd(adapter, scp, &if_busy);
1547         if (!scb) {     // command already completed
1548                 done(scp);
1549                 return 0;
1550         }
1551
1552         megaraid_mbox_runpendq(adapter, scb);
1553         return if_busy;
1554 }
1555
1556 /**
1557  * megaraid_mbox_build_cmd - transform the mid-layer scsi commands
1558  * @adapter     : controller's soft state
1559  * @scp         : mid-layer scsi command pointer
1560  * @busy        : set if request could not be completed because of lack of
1561  *              resources
1562  *
1563  * Transform the mid-layer scsi command to megaraid firmware lingua.
1564  * Convert the command issued by mid-layer to format understood by megaraid
1565  * firmware. We also complete certain commands without sending them to firmware.
1566  */
1567 static scb_t *
1568 megaraid_mbox_build_cmd(adapter_t *adapter, struct scsi_cmnd *scp, int *busy)
1569 {
1570         mraid_device_t          *rdev = ADAP2RAIDDEV(adapter);
1571         int                     channel;
1572         int                     target;
1573         int                     islogical;
1574         mbox_ccb_t              *ccb;
1575         mraid_passthru_t        *pthru;
1576         mbox64_t                *mbox64;
1577         mbox_t                  *mbox;
1578         scb_t                   *scb;
1579         char                    skip[] = "skipping";
1580         char                    scan[] = "scanning";
1581         char                    *ss;
1582
1583
1584         /*
1585          * Get the appropriate device map for the device this command is
1586          * intended for
1587          */
1588         MRAID_GET_DEVICE_MAP(adapter, scp, channel, target, islogical);
1589
1590         /*
1591          * Logical drive commands
1592          */
1593         if (islogical) {
1594                 switch (scp->cmnd[0]) {
1595                 case TEST_UNIT_READY:
1596                         /*
1597                          * Do we support clustering and is the support enabled
1598                          * If no, return success always
1599                          */
1600                         if (!adapter->ha) {
1601                                 scp->result = (DID_OK << 16);
1602                                 return NULL;
1603                         }
1604
1605                         if (!(scb = megaraid_alloc_scb(adapter, scp))) {
1606                                 scp->result = (DID_ERROR << 16);
1607                                 *busy = 1;
1608                                 return NULL;
1609                         }
1610
1611                         scb->dma_direction      = scp->sc_data_direction;
1612                         scb->dev_channel        = 0xFF;
1613                         scb->dev_target         = target;
1614                         ccb                     = (mbox_ccb_t *)scb->ccb;
1615
1616                         /*
1617                          * The command id will be provided by the command
1618                          * issuance routine
1619                          */
1620                         ccb->raw_mbox[0]        = CLUSTER_CMD;
1621                         ccb->raw_mbox[2]        = RESERVATION_STATUS;
1622                         ccb->raw_mbox[3]        = target;
1623
1624                         return scb;
1625
1626                 case MODE_SENSE:
1627                         if (scp->use_sg) {
1628                                 struct scatterlist      *sgl;
1629                                 caddr_t                 vaddr;
1630
1631                                 sgl = (struct scatterlist *)scp->request_buffer;
1632                                 if (sgl->page) {
1633                                         vaddr = (caddr_t)
1634                                                 (page_address((&sgl[0])->page)
1635                                                 + (&sgl[0])->offset);
1636
1637                                         memset(vaddr, 0, scp->cmnd[4]);
1638                                 }
1639                                 else {
1640                                         con_log(CL_ANN, (KERN_WARNING
1641                                         "megaraid mailbox: invalid sg:%d\n",
1642                                         __LINE__));
1643                                 }
1644                         }
1645                         else {
1646                                 memset(scp->request_buffer, 0, scp->cmnd[4]);
1647                         }
1648                         scp->result = (DID_OK << 16);
1649                         return NULL;
1650
1651                 case INQUIRY:
1652                         /*
1653                          * Display the channel scan for logical drives
1654                          * Do not display scan for a channel if already done.
1655                          */
1656                         if (!(rdev->last_disp & (1L << SCP2CHANNEL(scp)))) {
1657
1658                                 con_log(CL_ANN, (KERN_INFO
1659                                         "scsi[%d]: scanning scsi channel %d",
1660                                         adapter->host->host_no,
1661                                         SCP2CHANNEL(scp)));
1662
1663                                 con_log(CL_ANN, (
1664                                         " [virtual] for logical drives\n"));
1665
1666                                 rdev->last_disp |= (1L << SCP2CHANNEL(scp));
1667                         }
1668
1669                         if (scp->cmnd[1] & MEGA_SCSI_INQ_EVPD) {
1670                                 scp->sense_buffer[0] = 0x70;
1671                                 scp->sense_buffer[2] = ILLEGAL_REQUEST;
1672                                 scp->sense_buffer[12] = MEGA_INVALID_FIELD_IN_CDB;
1673                                 scp->result = CHECK_CONDITION << 1;
1674                                 return NULL;
1675                         }
1676
1677                         /* Fall through */
1678
1679                 case READ_CAPACITY:
1680                         /*
1681                          * Do not allow LUN > 0 for logical drives and
1682                          * requests for more than 40 logical drives
1683                          */
1684                         if (SCP2LUN(scp)) {
1685                                 scp->result = (DID_BAD_TARGET << 16);
1686                                 return NULL;
1687                         }
1688                         if ((target % 0x80) >= MAX_LOGICAL_DRIVES_40LD) {
1689                                 scp->result = (DID_BAD_TARGET << 16);
1690                                 return NULL;
1691                         }
1692
1693
1694                         /* Allocate a SCB and initialize passthru */
1695                         if (!(scb = megaraid_alloc_scb(adapter, scp))) {
1696                                 scp->result = (DID_ERROR << 16);
1697                                 *busy = 1;
1698                                 return NULL;
1699                         }
1700
1701                         ccb                     = (mbox_ccb_t *)scb->ccb;
1702                         scb->dev_channel        = 0xFF;
1703                         scb->dev_target         = target;
1704                         pthru                   = ccb->pthru;
1705                         mbox                    = ccb->mbox;
1706                         mbox64                  = ccb->mbox64;
1707
1708                         pthru->timeout          = 0;
1709                         pthru->ars              = 1;
1710                         pthru->reqsenselen      = 14;
1711                         pthru->islogical        = 1;
1712                         pthru->logdrv           = target;
1713                         pthru->cdblen           = scp->cmd_len;
1714                         memcpy(pthru->cdb, scp->cmnd, scp->cmd_len);
1715
1716                         mbox->cmd               = MBOXCMD_PASSTHRU64;
1717                         scb->dma_direction      = scp->sc_data_direction;
1718
1719                         pthru->dataxferlen      = scp->request_bufflen;
1720                         pthru->dataxferaddr     = ccb->sgl_dma_h;
1721                         pthru->numsge           = megaraid_mbox_mksgl(adapter,
1722                                                         scb);
1723
1724                         mbox->xferaddr          = 0xFFFFFFFF;
1725                         mbox64->xferaddr_lo     = (uint32_t )ccb->pthru_dma_h;
1726                         mbox64->xferaddr_hi     = 0;
1727
1728                         return scb;
1729
1730                 case READ_6:
1731                 case WRITE_6:
1732                 case READ_10:
1733                 case WRITE_10:
1734                 case READ_12:
1735                 case WRITE_12:
1736
1737                         /*
1738                          * Allocate a SCB and initialize mailbox
1739                          */
1740                         if (!(scb = megaraid_alloc_scb(adapter, scp))) {
1741                                 scp->result = (DID_ERROR << 16);
1742                                 *busy = 1;
1743                                 return NULL;
1744                         }
1745                         ccb                     = (mbox_ccb_t *)scb->ccb;
1746                         scb->dev_channel        = 0xFF;
1747                         scb->dev_target         = target;
1748                         mbox                    = ccb->mbox;
1749                         mbox64                  = ccb->mbox64;
1750                         mbox->logdrv            = target;
1751
1752                         /*
1753                          * A little HACK: 2nd bit is zero for all scsi read
1754                          * commands and is set for all scsi write commands
1755                          */
1756                         mbox->cmd = (scp->cmnd[0] & 0x02) ?  MBOXCMD_LWRITE64:
1757                                         MBOXCMD_LREAD64 ;
1758
1759                         /*
1760                          * 6-byte READ(0x08) or WRITE(0x0A) cdb
1761                          */
1762                         if (scp->cmd_len == 6) {
1763                                 mbox->numsectors = (uint32_t)scp->cmnd[4];
1764                                 mbox->lba =
1765                                         ((uint32_t)scp->cmnd[1] << 16)  |
1766                                         ((uint32_t)scp->cmnd[2] << 8)   |
1767                                         (uint32_t)scp->cmnd[3];
1768
1769                                 mbox->lba &= 0x1FFFFF;
1770                         }
1771
1772                         /*
1773                          * 10-byte READ(0x28) or WRITE(0x2A) cdb
1774                          */
1775                         else if (scp->cmd_len == 10) {
1776                                 mbox->numsectors =
1777                                         (uint32_t)scp->cmnd[8] |
1778                                         ((uint32_t)scp->cmnd[7] << 8);
1779                                 mbox->lba =
1780                                         ((uint32_t)scp->cmnd[2] << 24) |
1781                                         ((uint32_t)scp->cmnd[3] << 16) |
1782                                         ((uint32_t)scp->cmnd[4] << 8) |
1783                                         (uint32_t)scp->cmnd[5];
1784                         }
1785
1786                         /*
1787                          * 12-byte READ(0xA8) or WRITE(0xAA) cdb
1788                          */
1789                         else if (scp->cmd_len == 12) {
1790                                 mbox->lba =
1791                                         ((uint32_t)scp->cmnd[2] << 24) |
1792                                         ((uint32_t)scp->cmnd[3] << 16) |
1793                                         ((uint32_t)scp->cmnd[4] << 8) |
1794                                         (uint32_t)scp->cmnd[5];
1795
1796                                 mbox->numsectors =
1797                                         ((uint32_t)scp->cmnd[6] << 24) |
1798                                         ((uint32_t)scp->cmnd[7] << 16) |
1799                                         ((uint32_t)scp->cmnd[8] << 8) |
1800                                         (uint32_t)scp->cmnd[9];
1801                         }
1802                         else {
1803                                 con_log(CL_ANN, (KERN_WARNING
1804                                         "megaraid: unsupported CDB length\n"));
1805
1806                                 megaraid_dealloc_scb(adapter, scb);
1807
1808                                 scp->result = (DID_ERROR << 16);
1809                                 return NULL;
1810                         }
1811
1812                         scb->dma_direction = scp->sc_data_direction;
1813
1814                         // Calculate Scatter-Gather info
1815                         mbox64->xferaddr_lo     = (uint32_t )ccb->sgl_dma_h;
1816                         mbox->numsge            = megaraid_mbox_mksgl(adapter,
1817                                                         scb);
1818                         mbox->xferaddr          = 0xFFFFFFFF;
1819                         mbox64->xferaddr_hi     = 0;
1820
1821                         return scb;
1822
1823                 case RESERVE:
1824                 case RELEASE:
1825                         /*
1826                          * Do we support clustering and is the support enabled
1827                          */
1828                         if (!adapter->ha) {
1829                                 scp->result = (DID_BAD_TARGET << 16);
1830                                 return NULL;
1831                         }
1832
1833                         /*
1834                          * Allocate a SCB and initialize mailbox
1835                          */
1836                         if (!(scb = megaraid_alloc_scb(adapter, scp))) {
1837                                 scp->result = (DID_ERROR << 16);
1838                                 *busy = 1;
1839                                 return NULL;
1840                         }
1841
1842                         ccb                     = (mbox_ccb_t *)scb->ccb;
1843                         scb->dev_channel        = 0xFF;
1844                         scb->dev_target         = target;
1845                         ccb->raw_mbox[0]        = CLUSTER_CMD;
1846                         ccb->raw_mbox[2]        =  (scp->cmnd[0] == RESERVE) ?
1847                                                 RESERVE_LD : RELEASE_LD;
1848
1849                         ccb->raw_mbox[3]        = target;
1850                         scb->dma_direction      = scp->sc_data_direction;
1851
1852                         return scb;
1853
1854                 default:
1855                         scp->result = (DID_BAD_TARGET << 16);
1856                         return NULL;
1857                 }
1858         }
1859         else { // Passthru device commands
1860
1861                 // Do not allow access to target id > 15 or LUN > 7
1862                 if (target > 15 || SCP2LUN(scp) > 7) {
1863                         scp->result = (DID_BAD_TARGET << 16);
1864                         return NULL;
1865                 }
1866
1867                 // if fast load option was set and scan for last device is
1868                 // over, reset the fast_load flag so that during a possible
1869                 // next scan, devices can be made available
1870                 if (rdev->fast_load && (target == 15) &&
1871                         (SCP2CHANNEL(scp) == adapter->max_channel -1)) {
1872
1873                         con_log(CL_ANN, (KERN_INFO
1874                         "megaraid[%d]: physical device scan re-enabled\n",
1875                                 adapter->host->host_no));
1876                         rdev->fast_load = 0;
1877                 }
1878
1879                 /*
1880                  * Display the channel scan for physical devices
1881                  */
1882                 if (!(rdev->last_disp & (1L << SCP2CHANNEL(scp)))) {
1883
1884                         ss = rdev->fast_load ? skip : scan;
1885
1886                         con_log(CL_ANN, (KERN_INFO
1887                                 "scsi[%d]: %s scsi channel %d [Phy %d]",
1888                                 adapter->host->host_no, ss, SCP2CHANNEL(scp),
1889                                 channel));
1890
1891                         con_log(CL_ANN, (
1892                                 " for non-raid devices\n"));
1893
1894                         rdev->last_disp |= (1L << SCP2CHANNEL(scp));
1895                 }
1896
1897                 // disable channel sweep if fast load option given
1898                 if (rdev->fast_load) {
1899                         scp->result = (DID_BAD_TARGET << 16);
1900                         return NULL;
1901                 }
1902
1903                 // Allocate a SCB and initialize passthru
1904                 if (!(scb = megaraid_alloc_scb(adapter, scp))) {
1905                         scp->result = (DID_ERROR << 16);
1906                         *busy = 1;
1907                         return NULL;
1908                 }
1909
1910                 ccb                     = (mbox_ccb_t *)scb->ccb;
1911                 scb->dev_channel        = channel;
1912                 scb->dev_target         = target;
1913                 scb->dma_direction      = scp->sc_data_direction;
1914                 mbox                    = ccb->mbox;
1915                 mbox64                  = ccb->mbox64;
1916
1917                 // Does this firmware support extended CDBs
1918                 if (adapter->max_cdb_sz == 16) {
1919                         mbox->cmd               = MBOXCMD_EXTPTHRU;
1920
1921                         megaraid_mbox_prepare_epthru(adapter, scb, scp);
1922
1923                         mbox64->xferaddr_lo     = (uint32_t)ccb->epthru_dma_h;
1924                         mbox64->xferaddr_hi     = 0;
1925                         mbox->xferaddr          = 0xFFFFFFFF;
1926                 }
1927                 else {
1928                         mbox->cmd = MBOXCMD_PASSTHRU64;
1929
1930                         megaraid_mbox_prepare_pthru(adapter, scb, scp);
1931
1932                         mbox64->xferaddr_lo     = (uint32_t)ccb->pthru_dma_h;
1933                         mbox64->xferaddr_hi     = 0;
1934                         mbox->xferaddr          = 0xFFFFFFFF;
1935                 }
1936                 return scb;
1937         }
1938
1939         // NOT REACHED
1940 }
1941
1942
1943 /**
1944  * megaraid_mbox_runpendq - execute commands queued in the pending queue
1945  * @adapter     : controller's soft state
1946  * @scb_q       : SCB to be queued in the pending list
1947  *
1948  * Scan the pending list for commands which are not yet issued and try to
1949  * post to the controller. The SCB can be a null pointer, which would indicate
1950  * no SCB to be queue, just try to execute the ones in the pending list.
1951  *
1952  * NOTE: We do not actually traverse the pending list. The SCBs are plucked
1953  * out from the head of the pending list. If it is successfully issued, the
1954  * next SCB is at the head now.
1955  */
1956 static void
1957 megaraid_mbox_runpendq(adapter_t *adapter, scb_t *scb_q)
1958 {
1959         scb_t                   *scb;
1960         unsigned long           flags;
1961
1962         spin_lock_irqsave(PENDING_LIST_LOCK(adapter), flags);
1963
1964         if (scb_q) {
1965                 scb_q->state = SCB_PENDQ;
1966                 list_add_tail(&scb_q->list, &adapter->pend_list);
1967         }
1968
1969         // if the adapter in not in quiescent mode, post the commands to FW
1970         if (adapter->quiescent) {
1971                 spin_unlock_irqrestore(PENDING_LIST_LOCK(adapter), flags);
1972                 return;
1973         }
1974
1975         while (!list_empty(&adapter->pend_list)) {
1976
1977                 assert_spin_locked(PENDING_LIST_LOCK(adapter));
1978
1979                 scb = list_entry(adapter->pend_list.next, scb_t, list);
1980
1981                 // remove the scb from the pending list and try to
1982                 // issue. If we are unable to issue it, put back in
1983                 // the pending list and return
1984
1985                 list_del_init(&scb->list);
1986
1987                 spin_unlock_irqrestore(PENDING_LIST_LOCK(adapter), flags);
1988
1989                 // if mailbox was busy, return SCB back to pending
1990                 // list. Make sure to add at the head, since that's
1991                 // where it would have been removed from
1992
1993                 scb->state = SCB_ISSUED;
1994
1995                 if (mbox_post_cmd(adapter, scb) != 0) {
1996
1997                         spin_lock_irqsave(PENDING_LIST_LOCK(adapter), flags);
1998
1999                         scb->state = SCB_PENDQ;
2000
2001                         list_add(&scb->list, &adapter->pend_list);
2002
2003                         spin_unlock_irqrestore(PENDING_LIST_LOCK(adapter),
2004                                 flags);
2005
2006                         return;
2007                 }
2008
2009                 spin_lock_irqsave(PENDING_LIST_LOCK(adapter), flags);
2010         }
2011
2012         spin_unlock_irqrestore(PENDING_LIST_LOCK(adapter), flags);
2013
2014
2015         return;
2016 }
2017
2018
2019 /**
2020  * megaraid_mbox_prepare_pthru - prepare a command for physical devices
2021  * @adapter     : pointer to controller's soft state
2022  * @scb         : scsi control block
2023  * @scp         : scsi command from the mid-layer
2024  *
2025  * Prepare a command for the scsi physical devices.
2026  */
2027 static void
2028 megaraid_mbox_prepare_pthru(adapter_t *adapter, scb_t *scb,
2029                 struct scsi_cmnd *scp)
2030 {
2031         mbox_ccb_t              *ccb;
2032         mraid_passthru_t        *pthru;
2033         uint8_t                 channel;
2034         uint8_t                 target;
2035
2036         ccb     = (mbox_ccb_t *)scb->ccb;
2037         pthru   = ccb->pthru;
2038         channel = scb->dev_channel;
2039         target  = scb->dev_target;
2040
2041         // 0=6sec, 1=60sec, 2=10min, 3=3hrs, 4=NO timeout
2042         pthru->timeout          = 4;
2043         pthru->ars              = 1;
2044         pthru->islogical        = 0;
2045         pthru->channel          = 0;
2046         pthru->target           = (channel << 4) | target;
2047         pthru->logdrv           = SCP2LUN(scp);
2048         pthru->reqsenselen      = 14;
2049         pthru->cdblen           = scp->cmd_len;
2050
2051         memcpy(pthru->cdb, scp->cmnd, scp->cmd_len);
2052
2053         if (scp->request_bufflen) {
2054                 pthru->dataxferlen      = scp->request_bufflen;
2055                 pthru->dataxferaddr     = ccb->sgl_dma_h;
2056                 pthru->numsge           = megaraid_mbox_mksgl(adapter, scb);
2057         }
2058         else {
2059                 pthru->dataxferaddr     = 0;
2060                 pthru->dataxferlen      = 0;
2061                 pthru->numsge           = 0;
2062         }
2063         return;
2064 }
2065
2066
2067 /**
2068  * megaraid_mbox_prepare_epthru - prepare a command for physical devices
2069  * @adapter     : pointer to controller's soft state
2070  * @scb         : scsi control block
2071  * @scp         : scsi command from the mid-layer
2072  *
2073  * Prepare a command for the scsi physical devices. This rountine prepares
2074  * commands for devices which can take extended CDBs (>10 bytes).
2075  */
2076 static void
2077 megaraid_mbox_prepare_epthru(adapter_t *adapter, scb_t *scb,
2078                 struct scsi_cmnd *scp)
2079 {
2080         mbox_ccb_t              *ccb;
2081         mraid_epassthru_t       *epthru;
2082         uint8_t                 channel;
2083         uint8_t                 target;
2084
2085         ccb     = (mbox_ccb_t *)scb->ccb;
2086         epthru  = ccb->epthru;
2087         channel = scb->dev_channel;
2088         target  = scb->dev_target;
2089
2090         // 0=6sec, 1=60sec, 2=10min, 3=3hrs, 4=NO timeout
2091         epthru->timeout         = 4;
2092         epthru->ars             = 1;
2093         epthru->islogical       = 0;
2094         epthru->channel         = 0;
2095         epthru->target          = (channel << 4) | target;
2096         epthru->logdrv          = SCP2LUN(scp);
2097         epthru->reqsenselen     = 14;
2098         epthru->cdblen          = scp->cmd_len;
2099
2100         memcpy(epthru->cdb, scp->cmnd, scp->cmd_len);
2101
2102         if (scp->request_bufflen) {
2103                 epthru->dataxferlen     = scp->request_bufflen;
2104                 epthru->dataxferaddr    = ccb->sgl_dma_h;
2105                 epthru->numsge          = megaraid_mbox_mksgl(adapter, scb);
2106         }
2107         else {
2108                 epthru->dataxferaddr    = 0;
2109                 epthru->dataxferlen     = 0;
2110                 epthru->numsge          = 0;
2111         }
2112         return;
2113 }
2114
2115
2116 /**
2117  * megaraid_ack_sequence - interrupt ack sequence for memory mapped HBAs
2118  * @adapter     : controller's soft state
2119  *
2120  * Interrupt acknowledgement sequence for memory mapped HBAs. Find out the
2121  * completed command and put them on the completed list for later processing.
2122  *
2123  * Returns:     1 if the interrupt is valid, 0 otherwise
2124  */
2125 static int
2126 megaraid_ack_sequence(adapter_t *adapter)
2127 {
2128         mraid_device_t          *raid_dev = ADAP2RAIDDEV(adapter);
2129         mbox_t                  *mbox;
2130         scb_t                   *scb;
2131         uint8_t                 nstatus;
2132         uint8_t                 completed[MBOX_MAX_FIRMWARE_STATUS];
2133         struct list_head        clist;
2134         int                     handled;
2135         uint32_t                dword;
2136         unsigned long           flags;
2137         int                     i, j;
2138
2139
2140         mbox    = raid_dev->mbox;
2141
2142         // move the SCBs from the firmware completed array to our local list
2143         INIT_LIST_HEAD(&clist);
2144
2145         // loop till F/W has more commands for us to complete
2146         handled = 0;
2147         spin_lock_irqsave(MAILBOX_LOCK(raid_dev), flags);
2148         do {
2149                 /*
2150                  * Check if a valid interrupt is pending. If found, force the
2151                  * interrupt line low.
2152                  */
2153                 dword = RDOUTDOOR(raid_dev);
2154                 if (dword != 0x10001234) break;
2155
2156                 handled = 1;
2157
2158                 WROUTDOOR(raid_dev, 0x10001234);
2159
2160                 nstatus = 0;
2161                 // wait for valid numstatus to post
2162                 for (i = 0; i < 0xFFFFF; i++) {
2163                         if (mbox->numstatus != 0xFF) {
2164                                 nstatus = mbox->numstatus;
2165                                 break;
2166                         }
2167                         rmb();
2168                 }
2169                 mbox->numstatus = 0xFF;
2170
2171                 adapter->outstanding_cmds -= nstatus;
2172
2173                 for (i = 0; i < nstatus; i++) {
2174
2175                         // wait for valid command index to post
2176                         for (j = 0; j < 0xFFFFF; j++) {
2177                                 if (mbox->completed[i] != 0xFF) break;
2178                                 rmb();
2179                         }
2180                         completed[i]            = mbox->completed[i];
2181                         mbox->completed[i]      = 0xFF;
2182
2183                         if (completed[i] == 0xFF) {
2184                                 con_log(CL_ANN, (KERN_CRIT
2185                                 "megaraid: command posting timed out\n"));
2186
2187                                 BUG();
2188                                 continue;
2189                         }
2190
2191                         // Get SCB associated with this command id
2192                         if (completed[i] >= MBOX_MAX_SCSI_CMDS) {
2193                                 // a cmm command
2194                                 scb = adapter->uscb_list + (completed[i] -
2195                                                 MBOX_MAX_SCSI_CMDS);
2196                         }
2197                         else {
2198                                 // an os command
2199                                 scb = adapter->kscb_list + completed[i];
2200                         }
2201
2202                         scb->status = mbox->status;
2203                         list_add_tail(&scb->list, &clist);
2204                 }
2205
2206                 // Acknowledge interrupt
2207                 WRINDOOR(raid_dev, 0x02);
2208
2209         } while(1);
2210
2211         spin_unlock_irqrestore(MAILBOX_LOCK(raid_dev), flags);
2212
2213
2214         // put the completed commands in the completed list. DPC would
2215         // complete these commands later
2216         spin_lock_irqsave(COMPLETED_LIST_LOCK(adapter), flags);
2217
2218         list_splice(&clist, &adapter->completed_list);
2219
2220         spin_unlock_irqrestore(COMPLETED_LIST_LOCK(adapter), flags);
2221
2222
2223         // schedule the DPC if there is some work for it
2224         if (handled)
2225                 tasklet_schedule(&adapter->dpc_h);
2226
2227         return handled;
2228 }
2229
2230
2231 /**
2232  * megaraid_isr - isr for memory based mailbox based controllers
2233  * @irq         : irq
2234  * @devp        : pointer to our soft state
2235  *
2236  * Interrupt service routine for memory-mapped mailbox controllers.
2237  */
2238 static irqreturn_t
2239 megaraid_isr(int irq, void *devp)
2240 {
2241         adapter_t       *adapter = devp;
2242         int             handled;
2243
2244         handled = megaraid_ack_sequence(adapter);
2245
2246         /* Loop through any pending requests */
2247         if (!adapter->quiescent) {
2248                 megaraid_mbox_runpendq(adapter, NULL);
2249         }
2250
2251         return IRQ_RETVAL(handled);
2252 }
2253
2254
2255 /**
2256  * megaraid_mbox_sync_scb - sync kernel buffers
2257  * @adapter     : controller's soft state
2258  * @scb         : pointer to the resource packet
2259  *
2260  * DMA sync if required.
2261  */
2262 static void
2263 megaraid_mbox_sync_scb(adapter_t *adapter, scb_t *scb)
2264 {
2265         mbox_ccb_t      *ccb;
2266
2267         ccb     = (mbox_ccb_t *)scb->ccb;
2268
2269         switch (scb->dma_type) {
2270
2271         case MRAID_DMA_WBUF:
2272                 if (scb->dma_direction == PCI_DMA_FROMDEVICE) {
2273                         pci_dma_sync_single_for_cpu(adapter->pdev,
2274                                         ccb->buf_dma_h,
2275                                         scb->scp->request_bufflen,
2276                                         PCI_DMA_FROMDEVICE);
2277                 }
2278
2279                 pci_unmap_page(adapter->pdev, ccb->buf_dma_h,
2280                         scb->scp->request_bufflen, scb->dma_direction);
2281
2282                 break;
2283
2284         case MRAID_DMA_WSG:
2285                 if (scb->dma_direction == PCI_DMA_FROMDEVICE) {
2286                         pci_dma_sync_sg_for_cpu(adapter->pdev,
2287                                         scb->scp->request_buffer,
2288                                         scb->scp->use_sg, PCI_DMA_FROMDEVICE);
2289                 }
2290
2291                 pci_unmap_sg(adapter->pdev, scb->scp->request_buffer,
2292                         scb->scp->use_sg, scb->dma_direction);
2293
2294                 break;
2295
2296         default:
2297                 break;
2298         }
2299
2300         return;
2301 }
2302
2303
2304 /**
2305  * megaraid_mbox_dpc - the tasklet to complete the commands from completed list
2306  * @devp        : pointer to HBA soft state
2307  *
2308  * Pick up the commands from the completed list and send back to the owners.
2309  * This is a reentrant function and does not assume any locks are held while
2310  * it is being called.
2311  */
2312 static void
2313 megaraid_mbox_dpc(unsigned long devp)
2314 {
2315         adapter_t               *adapter = (adapter_t *)devp;
2316         mraid_device_t          *raid_dev;
2317         struct list_head        clist;
2318         struct scatterlist      *sgl;
2319         scb_t                   *scb;
2320         scb_t                   *tmp;
2321         struct scsi_cmnd        *scp;
2322         mraid_passthru_t        *pthru;
2323         mraid_epassthru_t       *epthru;
2324         mbox_ccb_t              *ccb;
2325         int                     islogical;
2326         int                     pdev_index;
2327         int                     pdev_state;
2328         mbox_t                  *mbox;
2329         unsigned long           flags;
2330         uint8_t                 c;
2331         int                     status;
2332         uioc_t                  *kioc;
2333
2334
2335         if (!adapter) return;
2336
2337         raid_dev = ADAP2RAIDDEV(adapter);
2338
2339         // move the SCBs from the completed list to our local list
2340         INIT_LIST_HEAD(&clist);
2341
2342         spin_lock_irqsave(COMPLETED_LIST_LOCK(adapter), flags);
2343
2344         list_splice_init(&adapter->completed_list, &clist);
2345
2346         spin_unlock_irqrestore(COMPLETED_LIST_LOCK(adapter), flags);
2347
2348
2349         list_for_each_entry_safe(scb, tmp, &clist, list) {
2350
2351                 status          = scb->status;
2352                 scp             = scb->scp;
2353                 ccb             = (mbox_ccb_t *)scb->ccb;
2354                 pthru           = ccb->pthru;
2355                 epthru          = ccb->epthru;
2356                 mbox            = ccb->mbox;
2357
2358                 // Make sure f/w has completed a valid command
2359                 if (scb->state != SCB_ISSUED) {
2360                         con_log(CL_ANN, (KERN_CRIT
2361                         "megaraid critical err: invalid command %d:%d:%p\n",
2362                                 scb->sno, scb->state, scp));
2363                         BUG();
2364                         continue;       // Must never happen!
2365                 }
2366
2367                 // check for the management command and complete it right away
2368                 if (scb->sno >= MBOX_MAX_SCSI_CMDS) {
2369                         scb->state      = SCB_FREE;
2370                         scb->status     = status;
2371
2372                         // remove from local clist
2373                         list_del_init(&scb->list);
2374
2375                         kioc                    = (uioc_t *)scb->gp;
2376                         kioc->status            = 0;
2377
2378                         megaraid_mbox_mm_done(adapter, scb);
2379
2380                         continue;
2381                 }
2382
2383                 // Was an abort issued for this command earlier
2384                 if (scb->state & SCB_ABORT) {
2385                         con_log(CL_ANN, (KERN_NOTICE
2386                         "megaraid: aborted cmd %lx[%x] completed\n",
2387                                 scp->serial_number, scb->sno));
2388                 }
2389
2390                 /*
2391                  * If the inquiry came of a disk drive which is not part of
2392                  * any RAID array, expose it to the kernel. For this to be
2393                  * enabled, user must set the "megaraid_expose_unconf_disks"
2394                  * flag to 1 by specifying it on module parameter list.
2395                  * This would enable data migration off drives from other
2396                  * configurations.
2397                  */
2398                 islogical = MRAID_IS_LOGICAL(adapter, scp);
2399                 if (scp->cmnd[0] == INQUIRY && status == 0 && islogical == 0
2400                                 && IS_RAID_CH(raid_dev, scb->dev_channel)) {
2401
2402                         if (scp->use_sg) {
2403                                 sgl = (struct scatterlist *)
2404                                         scp->request_buffer;
2405
2406                                 if (sgl->page) {
2407                                         c = *(unsigned char *)
2408                                         (page_address((&sgl[0])->page) +
2409                                                 (&sgl[0])->offset);
2410                                 }
2411                                 else {
2412                                         con_log(CL_ANN, (KERN_WARNING
2413                                         "megaraid mailbox: invalid sg:%d\n",
2414                                         __LINE__));
2415                                         c = 0;
2416                                 }
2417                         }
2418                         else {
2419                                 c = *(uint8_t *)scp->request_buffer;
2420                         }
2421
2422                         if ((c & 0x1F ) == TYPE_DISK) {
2423                                 pdev_index = (scb->dev_channel * 16) +
2424                                         scb->dev_target;
2425                                 pdev_state =
2426                                         raid_dev->pdrv_state[pdev_index] & 0x0F;
2427
2428                                 if (pdev_state == PDRV_ONLINE           ||
2429                                         pdev_state == PDRV_FAILED       ||
2430                                         pdev_state == PDRV_RBLD         ||
2431                                         pdev_state == PDRV_HOTSPARE     ||
2432                                         megaraid_expose_unconf_disks == 0) {
2433
2434                                         status = 0xF0;
2435                                 }
2436                         }
2437                 }
2438
2439                 // Convert MegaRAID status to Linux error code
2440                 switch (status) {
2441
2442                 case 0x00:
2443
2444                         scp->result = (DID_OK << 16);
2445                         break;
2446
2447                 case 0x02:
2448
2449                         /* set sense_buffer and result fields */
2450                         if (mbox->cmd == MBOXCMD_PASSTHRU ||
2451                                 mbox->cmd == MBOXCMD_PASSTHRU64) {
2452
2453                                 memcpy(scp->sense_buffer, pthru->reqsensearea,
2454                                                 14);
2455
2456                                 scp->result = DRIVER_SENSE << 24 |
2457                                         DID_OK << 16 | CHECK_CONDITION << 1;
2458                         }
2459                         else {
2460                                 if (mbox->cmd == MBOXCMD_EXTPTHRU) {
2461
2462                                         memcpy(scp->sense_buffer,
2463                                                 epthru->reqsensearea, 14);
2464
2465                                         scp->result = DRIVER_SENSE << 24 |
2466                                                 DID_OK << 16 |
2467                                                 CHECK_CONDITION << 1;
2468                                 } else {
2469                                         scp->sense_buffer[0] = 0x70;
2470                                         scp->sense_buffer[2] = ABORTED_COMMAND;
2471                                         scp->result = CHECK_CONDITION << 1;
2472                                 }
2473                         }
2474                         break;
2475
2476                 case 0x08:
2477
2478                         scp->result = DID_BUS_BUSY << 16 | status;
2479                         break;
2480
2481                 default:
2482
2483                         /*
2484                          * If TEST_UNIT_READY fails, we know RESERVATION_STATUS
2485                          * failed
2486                          */
2487                         if (scp->cmnd[0] == TEST_UNIT_READY) {
2488                                 scp->result = DID_ERROR << 16 |
2489                                         RESERVATION_CONFLICT << 1;
2490                         }
2491                         else
2492                         /*
2493                          * Error code returned is 1 if Reserve or Release
2494                          * failed or the input parameter is invalid
2495                          */
2496                         if (status == 1 && (scp->cmnd[0] == RESERVE ||
2497                                          scp->cmnd[0] == RELEASE)) {
2498
2499                                 scp->result = DID_ERROR << 16 |
2500                                         RESERVATION_CONFLICT << 1;
2501                         }
2502                         else {
2503                                 scp->result = DID_BAD_TARGET << 16 | status;
2504                         }
2505                 }
2506
2507                 // print a debug message for all failed commands
2508                 if (status) {
2509                         megaraid_mbox_display_scb(adapter, scb);
2510                 }
2511
2512                 // Free our internal resources and call the mid-layer callback
2513                 // routine
2514                 megaraid_mbox_sync_scb(adapter, scb);
2515
2516                 // remove from local clist
2517                 list_del_init(&scb->list);
2518
2519                 // put back in free list
2520                 megaraid_dealloc_scb(adapter, scb);
2521
2522                 // send the scsi packet back to kernel
2523                 scp->scsi_done(scp);
2524         }
2525
2526         return;
2527 }
2528
2529
2530 /**
2531  * megaraid_abort_handler - abort the scsi command
2532  * @scp         : command to be aborted
2533  *
2534  * Abort a previous SCSI request. Only commands on the pending list can be
2535  * aborted. All the commands issued to the F/W must complete.
2536  **/
2537 static int
2538 megaraid_abort_handler(struct scsi_cmnd *scp)
2539 {
2540         adapter_t               *adapter;
2541         mraid_device_t          *raid_dev;
2542         scb_t                   *scb;
2543         scb_t                   *tmp;
2544         int                     found;
2545         unsigned long           flags;
2546         int                     i;
2547
2548
2549         adapter         = SCP2ADAPTER(scp);
2550         raid_dev        = ADAP2RAIDDEV(adapter);
2551
2552         con_log(CL_ANN, (KERN_WARNING
2553                 "megaraid: aborting-%ld cmd=%x <c=%d t=%d l=%d>\n",
2554                 scp->serial_number, scp->cmnd[0], SCP2CHANNEL(scp),
2555                 SCP2TARGET(scp), SCP2LUN(scp)));
2556
2557         // If FW has stopped responding, simply return failure
2558         if (raid_dev->hw_error) {
2559                 con_log(CL_ANN, (KERN_NOTICE
2560                         "megaraid: hw error, not aborting\n"));
2561                 return FAILED;
2562         }
2563
2564         // There might a race here, where the command was completed by the
2565         // firmware and now it is on the completed list. Before we could
2566         // complete the command to the kernel in dpc, the abort came.
2567         // Find out if this is the case to avoid the race.
2568         scb = NULL;
2569         spin_lock_irqsave(COMPLETED_LIST_LOCK(adapter), flags);
2570         list_for_each_entry_safe(scb, tmp, &adapter->completed_list, list) {
2571
2572                 if (scb->scp == scp) {  // Found command
2573
2574                         list_del_init(&scb->list);      // from completed list
2575
2576                         con_log(CL_ANN, (KERN_WARNING
2577                         "megaraid: %ld:%d[%d:%d], abort from completed list\n",
2578                                 scp->serial_number, scb->sno,
2579                                 scb->dev_channel, scb->dev_target));
2580
2581                         scp->result = (DID_ABORT << 16);
2582                         scp->scsi_done(scp);
2583
2584                         megaraid_dealloc_scb(adapter, scb);
2585
2586                         spin_unlock_irqrestore(COMPLETED_LIST_LOCK(adapter),
2587                                 flags);
2588
2589                         return SUCCESS;
2590                 }
2591         }
2592         spin_unlock_irqrestore(COMPLETED_LIST_LOCK(adapter), flags);
2593
2594
2595         // Find out if this command is still on the pending list. If it is and
2596         // was never issued, abort and return success. If the command is owned
2597         // by the firmware, we must wait for it to complete by the FW.
2598         spin_lock_irqsave(PENDING_LIST_LOCK(adapter), flags);
2599         list_for_each_entry_safe(scb, tmp, &adapter->pend_list, list) {
2600
2601                 if (scb->scp == scp) {  // Found command
2602
2603                         list_del_init(&scb->list);      // from pending list
2604
2605                         ASSERT(!(scb->state & SCB_ISSUED));
2606
2607                         con_log(CL_ANN, (KERN_WARNING
2608                                 "megaraid abort: %ld[%d:%d], driver owner\n",
2609                                 scp->serial_number, scb->dev_channel,
2610                                 scb->dev_target));
2611
2612                         scp->result = (DID_ABORT << 16);
2613                         scp->scsi_done(scp);
2614
2615                         megaraid_dealloc_scb(adapter, scb);
2616
2617                         spin_unlock_irqrestore(PENDING_LIST_LOCK(adapter),
2618                                 flags);
2619
2620                         return SUCCESS;
2621                 }
2622         }
2623         spin_unlock_irqrestore(PENDING_LIST_LOCK(adapter), flags);
2624
2625
2626         // Check do we even own this command, in which case this would be
2627         // owned by the firmware. The only way to locate the FW scb is to
2628         // traverse through the list of all SCB, since driver does not
2629         // maintain these SCBs on any list
2630         found = 0;
2631         spin_lock_irq(&adapter->lock);
2632         for (i = 0; i < MBOX_MAX_SCSI_CMDS; i++) {
2633                 scb = adapter->kscb_list + i;
2634
2635                 if (scb->scp == scp) {
2636
2637                         found = 1;
2638
2639                         if (!(scb->state & SCB_ISSUED)) {
2640                                 con_log(CL_ANN, (KERN_WARNING
2641                                 "megaraid abort: %ld%d[%d:%d], invalid state\n",
2642                                 scp->serial_number, scb->sno, scb->dev_channel,
2643                                 scb->dev_target));
2644                                 BUG();
2645                         }
2646                         else {
2647                                 con_log(CL_ANN, (KERN_WARNING
2648                                 "megaraid abort: %ld:%d[%d:%d], fw owner\n",
2649                                 scp->serial_number, scb->sno, scb->dev_channel,
2650                                 scb->dev_target));
2651                         }
2652                 }
2653         }
2654         spin_unlock_irq(&adapter->lock);
2655
2656         if (!found) {
2657                 con_log(CL_ANN, (KERN_WARNING
2658                         "megaraid abort: scsi cmd:%ld, do now own\n",
2659                         scp->serial_number));
2660
2661                 // FIXME: Should there be a callback for this command?
2662                 return SUCCESS;
2663         }
2664
2665         // We cannot actually abort a command owned by firmware, return
2666         // failure and wait for reset. In host reset handler, we will find out
2667         // if the HBA is still live
2668         return FAILED;
2669 }
2670
2671 /**
2672  * megaraid_reset_handler - device reset hadler for mailbox based driver
2673  * @scp         : reference command
2674  *
2675  * Reset handler for the mailbox based controller. First try to find out if
2676  * the FW is still live, in which case the outstanding commands counter mut go
2677  * down to 0. If that happens, also issue the reservation reset command to
2678  * relinquish (possible) reservations on the logical drives connected to this
2679  * host.
2680  **/
2681 static int
2682 megaraid_reset_handler(struct scsi_cmnd *scp)
2683 {
2684         adapter_t       *adapter;
2685         scb_t           *scb;
2686         scb_t           *tmp;
2687         mraid_device_t  *raid_dev;
2688         unsigned long   flags;
2689         uint8_t         raw_mbox[sizeof(mbox_t)];
2690         int             rval;
2691         int             recovery_window;
2692         int             recovering;
2693         int             i;
2694         uioc_t          *kioc;
2695
2696         adapter         = SCP2ADAPTER(scp);
2697         raid_dev        = ADAP2RAIDDEV(adapter);
2698
2699         // return failure if adapter is not responding
2700         if (raid_dev->hw_error) {
2701                 con_log(CL_ANN, (KERN_NOTICE
2702                         "megaraid: hw error, cannot reset\n"));
2703                 return FAILED;
2704         }
2705
2706
2707         // Under exceptional conditions, FW can take up to 3 minutes to
2708         // complete command processing. Wait for additional 2 minutes for the
2709         // pending commands counter to go down to 0. If it doesn't, let the
2710         // controller be marked offline
2711         // Also, reset all the commands currently owned by the driver
2712         spin_lock_irqsave(PENDING_LIST_LOCK(adapter), flags);
2713         list_for_each_entry_safe(scb, tmp, &adapter->pend_list, list) {
2714                 list_del_init(&scb->list);      // from pending list
2715
2716                 if (scb->sno >= MBOX_MAX_SCSI_CMDS) {
2717                         con_log(CL_ANN, (KERN_WARNING
2718                         "megaraid: IOCTL packet with %d[%d:%d] being reset\n",
2719                         scb->sno, scb->dev_channel, scb->dev_target));
2720
2721                         scb->status = -1;
2722
2723                         kioc                    = (uioc_t *)scb->gp;
2724                         kioc->status            = -EFAULT;
2725
2726                         megaraid_mbox_mm_done(adapter, scb);
2727                 } else {
2728                         if (scb->scp == scp) {  // Found command
2729                                 con_log(CL_ANN, (KERN_WARNING
2730                                         "megaraid: %ld:%d[%d:%d], reset from pending list\n",
2731                                         scp->serial_number, scb->sno,
2732                                         scb->dev_channel, scb->dev_target));
2733                         } else {
2734                                 con_log(CL_ANN, (KERN_WARNING
2735                                 "megaraid: IO packet with %d[%d:%d] being reset\n",
2736                                 scb->sno, scb->dev_channel, scb->dev_target));
2737                         }
2738
2739                         scb->scp->result = (DID_RESET << 16);
2740                         scb->scp->scsi_done(scb->scp);
2741
2742                         megaraid_dealloc_scb(adapter, scb);
2743                 }
2744         }
2745         spin_unlock_irqrestore(PENDING_LIST_LOCK(adapter), flags);
2746
2747         if (adapter->outstanding_cmds) {
2748                 con_log(CL_ANN, (KERN_NOTICE
2749                         "megaraid: %d outstanding commands. Max wait %d sec\n",
2750                         adapter->outstanding_cmds,
2751                         (MBOX_RESET_WAIT + MBOX_RESET_EXT_WAIT)));
2752         }
2753
2754         recovery_window = MBOX_RESET_WAIT + MBOX_RESET_EXT_WAIT;
2755
2756         recovering = adapter->outstanding_cmds;
2757
2758         for (i = 0; i < recovery_window; i++) {
2759
2760                 megaraid_ack_sequence(adapter);
2761
2762                 // print a message once every 5 seconds only
2763                 if (!(i % 5)) {
2764                         con_log(CL_ANN, (
2765                         "megaraid mbox: Wait for %d commands to complete:%d\n",
2766                                 adapter->outstanding_cmds,
2767                                 (MBOX_RESET_WAIT + MBOX_RESET_EXT_WAIT) - i));
2768                 }
2769
2770                 // bailout if no recovery happended in reset time
2771                 if (adapter->outstanding_cmds == 0) {
2772                         break;
2773                 }
2774
2775                 msleep(1000);
2776         }
2777
2778         spin_lock(&adapter->lock);
2779
2780         // If still outstanding commands, bail out
2781         if (adapter->outstanding_cmds) {
2782                 con_log(CL_ANN, (KERN_WARNING
2783                         "megaraid mbox: critical hardware error!\n"));
2784
2785                 raid_dev->hw_error = 1;
2786
2787                 rval = FAILED;
2788                 goto out;
2789         }
2790         else {
2791                 con_log(CL_ANN, (KERN_NOTICE
2792                 "megaraid mbox: reset sequence completed sucessfully\n"));
2793         }
2794
2795
2796         // If the controller supports clustering, reset reservations
2797         if (!adapter->ha) {
2798                 rval = SUCCESS;
2799                 goto out;
2800         }
2801
2802         // clear reservations if any
2803         raw_mbox[0] = CLUSTER_CMD;
2804         raw_mbox[2] = RESET_RESERVATIONS;
2805
2806         rval = SUCCESS;
2807         if (mbox_post_sync_cmd_fast(adapter, raw_mbox) == 0) {
2808                 con_log(CL_ANN,
2809                         (KERN_INFO "megaraid: reservation reset\n"));
2810         }
2811         else {
2812                 rval = FAILED;
2813                 con_log(CL_ANN, (KERN_WARNING
2814                                 "megaraid: reservation reset failed\n"));
2815         }
2816
2817  out:
2818         spin_unlock_irq(&adapter->lock);
2819         return rval;
2820 }
2821
2822 /*
2823  * START: internal commands library
2824  *
2825  * This section of the driver has the common routine used by the driver and
2826  * also has all the FW routines
2827  */
2828
2829 /**
2830  * mbox_post_sync_cmd() - blocking command to the mailbox based controllers
2831  * @adapter     : controller's soft state
2832  * @raw_mbox    : the mailbox
2833  *
2834  * Issue a scb in synchronous and non-interrupt mode for mailbox based
2835  * controllers.
2836  */
2837 static int
2838 mbox_post_sync_cmd(adapter_t *adapter, uint8_t raw_mbox[])
2839 {
2840         mraid_device_t  *raid_dev = ADAP2RAIDDEV(adapter);
2841         mbox64_t        *mbox64;
2842         mbox_t          *mbox;
2843         uint8_t         status;
2844         int             i;
2845
2846
2847         mbox64  = raid_dev->mbox64;
2848         mbox    = raid_dev->mbox;
2849
2850         /*
2851          * Wait until mailbox is free
2852          */
2853         if (megaraid_busywait_mbox(raid_dev) != 0)
2854                 goto blocked_mailbox;
2855
2856         /*
2857          * Copy mailbox data into host structure
2858          */
2859         memcpy((caddr_t)mbox, (caddr_t)raw_mbox, 16);
2860         mbox->cmdid             = 0xFE;
2861         mbox->busy              = 1;
2862         mbox->poll              = 0;
2863         mbox->ack               = 0;
2864         mbox->numstatus         = 0xFF;
2865         mbox->status            = 0xFF;
2866
2867         wmb();
2868         WRINDOOR(raid_dev, raid_dev->mbox_dma | 0x1);
2869
2870         // wait for maximum 1 second for status to post. If the status is not
2871         // available within 1 second, assume FW is initializing and wait
2872         // for an extended amount of time
2873         if (mbox->numstatus == 0xFF) {  // status not yet available
2874                 udelay(25);
2875
2876                 for (i = 0; mbox->numstatus == 0xFF && i < 1000; i++) {
2877                         rmb();
2878                         msleep(1);
2879                 }
2880
2881
2882                 if (i == 1000) {
2883                         con_log(CL_ANN, (KERN_NOTICE
2884                                 "megaraid mailbox: wait for FW to boot      "));
2885
2886                         for (i = 0; (mbox->numstatus == 0xFF) &&
2887                                         (i < MBOX_RESET_WAIT); i++) {
2888                                 rmb();
2889                                 con_log(CL_ANN, ("\b\b\b\b\b[%03d]",
2890                                                         MBOX_RESET_WAIT - i));
2891                                 msleep(1000);
2892                         }
2893
2894                         if (i == MBOX_RESET_WAIT) {
2895
2896                                 con_log(CL_ANN, (
2897                                 "\nmegaraid mailbox: status not available\n"));
2898
2899                                 return -1;
2900                         }
2901                         con_log(CL_ANN, ("\b\b\b\b\b[ok] \n"));
2902                 }
2903         }
2904
2905         // wait for maximum 1 second for poll semaphore
2906         if (mbox->poll != 0x77) {
2907                 udelay(25);
2908
2909                 for (i = 0; (mbox->poll != 0x77) && (i < 1000); i++) {
2910                         rmb();
2911                         msleep(1);
2912                 }
2913
2914                 if (i == 1000) {
2915                         con_log(CL_ANN, (KERN_WARNING
2916                         "megaraid mailbox: could not get poll semaphore\n"));
2917                         return -1;
2918                 }
2919         }
2920
2921         WRINDOOR(raid_dev, raid_dev->mbox_dma | 0x2);
2922         wmb();
2923
2924         // wait for maximum 1 second for acknowledgement
2925         if (RDINDOOR(raid_dev) & 0x2) {
2926                 udelay(25);
2927
2928                 for (i = 0; (RDINDOOR(raid_dev) & 0x2) && (i < 1000); i++) {
2929                         rmb();
2930                         msleep(1);
2931                 }
2932
2933                 if (i == 1000) {
2934                         con_log(CL_ANN, (KERN_WARNING
2935                                 "megaraid mailbox: could not acknowledge\n"));
2936                         return -1;
2937                 }
2938         }
2939         mbox->poll      = 0;
2940         mbox->ack       = 0x77;
2941
2942         status = mbox->status;
2943
2944         // invalidate the completed command id array. After command
2945         // completion, firmware would write the valid id.
2946         mbox->numstatus = 0xFF;
2947         mbox->status    = 0xFF;
2948         for (i = 0; i < MBOX_MAX_FIRMWARE_STATUS; i++) {
2949                 mbox->completed[i] = 0xFF;
2950         }
2951
2952         return status;
2953
2954 blocked_mailbox:
2955
2956         con_log(CL_ANN, (KERN_WARNING "megaraid: blocked mailbox\n") );
2957         return -1;
2958 }
2959
2960
2961 /**
2962  * mbox_post_sync_cmd_fast - blocking command to the mailbox based controllers
2963  * @adapter     : controller's soft state
2964  * @raw_mbox    : the mailbox
2965  *
2966  * Issue a scb in synchronous and non-interrupt mode for mailbox based
2967  * controllers. This is a faster version of the synchronous command and
2968  * therefore can be called in interrupt-context as well.
2969  */
2970 static int
2971 mbox_post_sync_cmd_fast(adapter_t *adapter, uint8_t raw_mbox[])
2972 {
2973         mraid_device_t  *raid_dev = ADAP2RAIDDEV(adapter);
2974         mbox_t          *mbox;
2975         long            i;
2976
2977
2978         mbox    = raid_dev->mbox;
2979
2980         // return immediately if the mailbox is busy
2981         if (mbox->busy) return -1;
2982
2983         // Copy mailbox data into host structure
2984         memcpy((caddr_t)mbox, (caddr_t)raw_mbox, 14);
2985         mbox->cmdid             = 0xFE;
2986         mbox->busy              = 1;
2987         mbox->poll              = 0;
2988         mbox->ack               = 0;
2989         mbox->numstatus         = 0xFF;
2990         mbox->status            = 0xFF;
2991
2992         wmb();
2993         WRINDOOR(raid_dev, raid_dev->mbox_dma | 0x1);
2994
2995         for (i = 0; i < MBOX_SYNC_WAIT_CNT; i++) {
2996                 if (mbox->numstatus != 0xFF) break;
2997                 rmb();
2998                 udelay(MBOX_SYNC_DELAY_200);
2999         }
3000
3001         if (i == MBOX_SYNC_WAIT_CNT) {
3002                 // We may need to re-calibrate the counter
3003                 con_log(CL_ANN, (KERN_CRIT
3004                         "megaraid: fast sync command timed out\n"));
3005         }
3006
3007         WRINDOOR(raid_dev, raid_dev->mbox_dma | 0x2);
3008         wmb();
3009
3010         return mbox->status;
3011 }
3012
3013
3014 /**
3015  * megaraid_busywait_mbox() - Wait until the controller's mailbox is available
3016  * @raid_dev    : RAID device (HBA) soft state
3017  *
3018  * Wait until the controller's mailbox is available to accept more commands.
3019  * Wait for at most 1 second.
3020  */
3021 static int
3022 megaraid_busywait_mbox(mraid_device_t *raid_dev)
3023 {
3024         mbox_t  *mbox = raid_dev->mbox;
3025         int     i = 0;
3026
3027         if (mbox->busy) {
3028                 udelay(25);
3029                 for (i = 0; mbox->busy && i < 1000; i++)
3030                         msleep(1);
3031         }
3032
3033         if (i < 1000) return 0;
3034         else return -1;
3035 }
3036
3037
3038 /**
3039  * megaraid_mbox_product_info - some static information about the controller
3040  * @adapter     : our soft state
3041  *
3042  * Issue commands to the controller to grab some parameters required by our
3043  * caller.
3044  */
3045 static int
3046 megaraid_mbox_product_info(adapter_t *adapter)
3047 {
3048         mraid_device_t          *raid_dev = ADAP2RAIDDEV(adapter);
3049         mbox_t                  *mbox;
3050         uint8_t                 raw_mbox[sizeof(mbox_t)];
3051         mraid_pinfo_t           *pinfo;
3052         dma_addr_t              pinfo_dma_h;
3053         mraid_inquiry3_t        *mraid_inq3;
3054         int                     i;
3055
3056
3057         memset((caddr_t)raw_mbox, 0, sizeof(raw_mbox));
3058         mbox = (mbox_t *)raw_mbox;
3059
3060         /*
3061          * Issue an ENQUIRY3 command to find out certain adapter parameters,
3062          * e.g., max channels, max commands etc.
3063          */
3064         pinfo = pci_alloc_consistent(adapter->pdev, sizeof(mraid_pinfo_t),
3065                         &pinfo_dma_h);
3066
3067         if (pinfo == NULL) {
3068                 con_log(CL_ANN, (KERN_WARNING
3069                         "megaraid: out of memory, %s %d\n", __FUNCTION__,
3070                         __LINE__));
3071
3072                 return -1;
3073         }
3074         memset(pinfo, 0, sizeof(mraid_pinfo_t));
3075
3076         mbox->xferaddr = (uint32_t)adapter->ibuf_dma_h;
3077         memset((void *)adapter->ibuf, 0, MBOX_IBUF_SIZE);
3078
3079         raw_mbox[0] = FC_NEW_CONFIG;
3080         raw_mbox[2] = NC_SUBOP_ENQUIRY3;
3081         raw_mbox[3] = ENQ3_GET_SOLICITED_FULL;
3082
3083         // Issue the command
3084         if (mbox_post_sync_cmd(adapter, raw_mbox) != 0) {
3085
3086                 con_log(CL_ANN, (KERN_WARNING "megaraid: Inquiry3 failed\n"));
3087
3088                 pci_free_consistent(adapter->pdev, sizeof(mraid_pinfo_t),
3089                         pinfo, pinfo_dma_h);
3090
3091                 return -1;
3092         }
3093
3094         /*
3095          * Collect information about state of each physical drive
3096          * attached to the controller. We will expose all the disks
3097          * which are not part of RAID
3098          */
3099         mraid_inq3 = (mraid_inquiry3_t *)adapter->ibuf;
3100         for (i = 0; i < MBOX_MAX_PHYSICAL_DRIVES; i++) {
3101                 raid_dev->pdrv_state[i] = mraid_inq3->pdrv_state[i];
3102         }
3103
3104         /*
3105          * Get product info for information like number of channels,
3106          * maximum commands supported.
3107          */
3108         memset((caddr_t)raw_mbox, 0, sizeof(raw_mbox));
3109         mbox->xferaddr = (uint32_t)pinfo_dma_h;
3110
3111         raw_mbox[0] = FC_NEW_CONFIG;
3112         raw_mbox[2] = NC_SUBOP_PRODUCT_INFO;
3113
3114         if (mbox_post_sync_cmd(adapter, raw_mbox) != 0) {
3115
3116                 con_log(CL_ANN, (KERN_WARNING
3117                         "megaraid: product info failed\n"));
3118
3119                 pci_free_consistent(adapter->pdev, sizeof(mraid_pinfo_t),
3120                         pinfo, pinfo_dma_h);
3121
3122                 return -1;
3123         }
3124
3125         /*
3126          * Setup some parameters for host, as required by our caller
3127          */
3128         adapter->max_channel = pinfo->nchannels;
3129
3130         /*
3131          * we will export all the logical drives on a single channel.
3132          * Add 1 since inquires do not come for inititor ID
3133          */
3134         adapter->max_target     = MAX_LOGICAL_DRIVES_40LD + 1;
3135         adapter->max_lun        = 8;    // up to 8 LUNs for non-disk devices
3136
3137         /*
3138          * These are the maximum outstanding commands for the scsi-layer
3139          */
3140         adapter->max_cmds       = MBOX_MAX_SCSI_CMDS;
3141
3142         memset(adapter->fw_version, 0, VERSION_SIZE);
3143         memset(adapter->bios_version, 0, VERSION_SIZE);
3144
3145         memcpy(adapter->fw_version, pinfo->fw_version, 4);
3146         adapter->fw_version[4] = 0;
3147
3148         memcpy(adapter->bios_version, pinfo->bios_version, 4);
3149         adapter->bios_version[4] = 0;
3150
3151         con_log(CL_ANN, (KERN_NOTICE
3152                 "megaraid: fw version:[%s] bios version:[%s]\n",
3153                 adapter->fw_version, adapter->bios_version));
3154
3155         pci_free_consistent(adapter->pdev, sizeof(mraid_pinfo_t), pinfo,
3156                         pinfo_dma_h);
3157
3158         return 0;
3159 }
3160
3161
3162
3163 /**
3164  * megaraid_mbox_extended_cdb - check for support for extended CDBs
3165  * @adapter     : soft state for the controller
3166  *
3167  * This routine check whether the controller in question supports extended
3168  * ( > 10 bytes ) CDBs.
3169  */
3170 static int
3171 megaraid_mbox_extended_cdb(adapter_t *adapter)
3172 {
3173         mbox_t          *mbox;
3174         uint8_t         raw_mbox[sizeof(mbox_t)];
3175         int             rval;
3176
3177         mbox = (mbox_t *)raw_mbox;
3178
3179         memset((caddr_t)raw_mbox, 0, sizeof(raw_mbox));
3180         mbox->xferaddr  = (uint32_t)adapter->ibuf_dma_h;
3181
3182         memset((void *)adapter->ibuf, 0, MBOX_IBUF_SIZE);
3183
3184         raw_mbox[0] = MAIN_MISC_OPCODE;
3185         raw_mbox[2] = SUPPORT_EXT_CDB;
3186
3187         /*
3188          * Issue the command
3189          */
3190         rval = 0;
3191         if (mbox_post_sync_cmd(adapter, raw_mbox) != 0) {
3192                 rval = -1;
3193         }
3194
3195         return rval;
3196 }
3197
3198
3199 /**
3200  * megaraid_mbox_support_ha - Do we support clustering
3201  * @adapter     : soft state for the controller
3202  * @init_id     : ID of the initiator
3203  *
3204  * Determine if the firmware supports clustering and the ID of the initiator.
3205  */
3206 static int
3207 megaraid_mbox_support_ha(adapter_t *adapter, uint16_t *init_id)
3208 {
3209         mbox_t          *mbox;
3210         uint8_t         raw_mbox[sizeof(mbox_t)];
3211         int             rval;
3212
3213
3214         mbox = (mbox_t *)raw_mbox;
3215
3216         memset((caddr_t)raw_mbox, 0, sizeof(raw_mbox));
3217
3218         mbox->xferaddr = (uint32_t)adapter->ibuf_dma_h;
3219
3220         memset((void *)adapter->ibuf, 0, MBOX_IBUF_SIZE);
3221
3222         raw_mbox[0] = GET_TARGET_ID;
3223
3224         // Issue the command
3225         *init_id = 7;
3226         rval =  -1;
3227         if (mbox_post_sync_cmd(adapter, raw_mbox) == 0) {
3228
3229                 *init_id = *(uint8_t *)adapter->ibuf;
3230
3231                 con_log(CL_ANN, (KERN_INFO
3232                         "megaraid: cluster firmware, initiator ID: %d\n",
3233                         *init_id));
3234
3235                 rval =  0;
3236         }
3237
3238         return rval;
3239 }
3240
3241
3242 /**
3243  * megaraid_mbox_support_random_del - Do we support random deletion
3244  * @adapter     : soft state for the controller
3245  *
3246  * Determine if the firmware supports random deletion.
3247  * Return:      1 is operation supported, 0 otherwise
3248  */
3249 static int
3250 megaraid_mbox_support_random_del(adapter_t *adapter)
3251 {
3252         mbox_t          *mbox;
3253         uint8_t         raw_mbox[sizeof(mbox_t)];
3254         int             rval;
3255
3256
3257         mbox = (mbox_t *)raw_mbox;
3258
3259         memset((caddr_t)raw_mbox, 0, sizeof(mbox_t));
3260
3261         raw_mbox[0] = FC_DEL_LOGDRV;
3262         raw_mbox[2] = OP_SUP_DEL_LOGDRV;
3263
3264         // Issue the command
3265         rval = 0;
3266         if (mbox_post_sync_cmd(adapter, raw_mbox) == 0) {
3267
3268                 con_log(CL_DLEVEL1, ("megaraid: supports random deletion\n"));
3269
3270                 rval =  1;
3271         }
3272
3273         return rval;
3274 }
3275
3276
3277 /**
3278  * megaraid_mbox_get_max_sg - maximum sg elements supported by the firmware
3279  * @adapter     : soft state for the controller
3280  *
3281  * Find out the maximum number of scatter-gather elements supported by the
3282  * firmware.
3283  */
3284 static int
3285 megaraid_mbox_get_max_sg(adapter_t *adapter)
3286 {
3287         mbox_t          *mbox;
3288         uint8_t         raw_mbox[sizeof(mbox_t)];
3289         int             nsg;
3290
3291
3292         mbox = (mbox_t *)raw_mbox;
3293
3294         memset((caddr_t)raw_mbox, 0, sizeof(mbox_t));
3295
3296         mbox->xferaddr = (uint32_t)adapter->ibuf_dma_h;
3297
3298         memset((void *)adapter->ibuf, 0, MBOX_IBUF_SIZE);
3299
3300         raw_mbox[0] = MAIN_MISC_OPCODE;
3301         raw_mbox[2] = GET_MAX_SG_SUPPORT;
3302
3303         // Issue the command
3304         if (mbox_post_sync_cmd(adapter, raw_mbox) == 0) {
3305                 nsg =  *(uint8_t *)adapter->ibuf;
3306         }
3307         else {
3308                 nsg =  MBOX_DEFAULT_SG_SIZE;
3309         }
3310
3311         if (nsg > MBOX_MAX_SG_SIZE) nsg = MBOX_MAX_SG_SIZE;
3312
3313         return nsg;
3314 }
3315
3316
3317 /**
3318  * megaraid_mbox_enum_raid_scsi - enumerate the RAID and SCSI channels
3319  * @adapter     : soft state for the controller
3320  *
3321  * Enumerate the RAID and SCSI channels for ROMB platforms so that channels
3322  * can be exported as regular SCSI channels.
3323  */
3324 static void
3325 megaraid_mbox_enum_raid_scsi(adapter_t *adapter)
3326 {
3327         mraid_device_t  *raid_dev = ADAP2RAIDDEV(adapter);
3328         mbox_t          *mbox;
3329         uint8_t         raw_mbox[sizeof(mbox_t)];
3330
3331
3332         mbox = (mbox_t *)raw_mbox;
3333
3334         memset((caddr_t)raw_mbox, 0, sizeof(mbox_t));
3335
3336         mbox->xferaddr = (uint32_t)adapter->ibuf_dma_h;
3337
3338         memset((void *)adapter->ibuf, 0, MBOX_IBUF_SIZE);
3339
3340         raw_mbox[0] = CHNL_CLASS;
3341         raw_mbox[2] = GET_CHNL_CLASS;
3342
3343         // Issue the command. If the command fails, all channels are RAID
3344         // channels
3345         raid_dev->channel_class = 0xFF;
3346         if (mbox_post_sync_cmd(adapter, raw_mbox) == 0) {
3347                 raid_dev->channel_class =  *(uint8_t *)adapter->ibuf;
3348         }
3349
3350         return;
3351 }
3352
3353
3354 /**
3355  * megaraid_mbox_flush_cache - flush adapter and disks cache
3356  * @adapter             : soft state for the controller
3357  *
3358  * Flush adapter cache followed by disks cache.
3359  */
3360 static void
3361 megaraid_mbox_flush_cache(adapter_t *adapter)
3362 {
3363         mbox_t  *mbox;
3364         uint8_t raw_mbox[sizeof(mbox_t)];
3365
3366
3367         mbox = (mbox_t *)raw_mbox;
3368
3369         memset((caddr_t)raw_mbox, 0, sizeof(mbox_t));
3370
3371         raw_mbox[0] = FLUSH_ADAPTER;
3372
3373         if (mbox_post_sync_cmd(adapter, raw_mbox) != 0) {
3374                 con_log(CL_ANN, ("megaraid: flush adapter failed\n"));
3375         }
3376
3377         raw_mbox[0] = FLUSH_SYSTEM;
3378
3379         if (mbox_post_sync_cmd(adapter, raw_mbox) != 0) {
3380                 con_log(CL_ANN, ("megaraid: flush disks cache failed\n"));
3381         }
3382
3383         return;
3384 }
3385
3386
3387 /**
3388  * megaraid_mbox_fire_sync_cmd - fire the sync cmd
3389  * @adapter             : soft state for the controller
3390  *
3391  * Clears the pending cmds in FW and reinits its RAID structs.
3392  */
3393 static int
3394 megaraid_mbox_fire_sync_cmd(adapter_t *adapter)
3395 {
3396         mbox_t  *mbox;
3397         uint8_t raw_mbox[sizeof(mbox_t)];
3398         mraid_device_t  *raid_dev = ADAP2RAIDDEV(adapter);
3399         mbox64_t *mbox64;
3400         int     status = 0;
3401         int i;
3402         uint32_t dword;
3403
3404         mbox = (mbox_t *)raw_mbox;
3405
3406         memset((caddr_t)raw_mbox, 0, sizeof(mbox_t));
3407
3408         raw_mbox[0] = 0xFF;
3409
3410         mbox64  = raid_dev->mbox64;
3411         mbox    = raid_dev->mbox;
3412
3413         /* Wait until mailbox is free */
3414         if (megaraid_busywait_mbox(raid_dev) != 0) {
3415                 status = 1;
3416                 goto blocked_mailbox;
3417         }
3418
3419         /* Copy mailbox data into host structure */
3420         memcpy((caddr_t)mbox, (caddr_t)raw_mbox, 16);
3421         mbox->cmdid             = 0xFE;
3422         mbox->busy              = 1;
3423         mbox->poll              = 0;
3424         mbox->ack               = 0;
3425         mbox->numstatus         = 0;
3426         mbox->status            = 0;
3427
3428         wmb();
3429         WRINDOOR(raid_dev, raid_dev->mbox_dma | 0x1);
3430
3431         /* Wait for maximum 1 min for status to post.
3432          * If the Firmware SUPPORTS the ABOVE COMMAND,
3433          * mbox->cmd will be set to 0
3434          * else
3435          * the firmware will reject the command with
3436          * mbox->numstatus set to 1
3437          */
3438
3439         i = 0;
3440         status = 0;
3441         while (!mbox->numstatus && mbox->cmd == 0xFF) {
3442                 rmb();
3443                 msleep(1);
3444                 i++;
3445                 if (i > 1000 * 60) {
3446                         status = 1;
3447                         break;
3448                 }
3449         }
3450         if (mbox->numstatus == 1)
3451                 status = 1; /*cmd not supported*/
3452
3453         /* Check for interrupt line */
3454         dword = RDOUTDOOR(raid_dev);
3455         WROUTDOOR(raid_dev, dword);
3456         WRINDOOR(raid_dev,2);
3457
3458         return status;
3459
3460 blocked_mailbox:
3461         con_log(CL_ANN, (KERN_WARNING "megaraid: blocked mailbox\n"));
3462         return status;
3463 }
3464
3465 /**
3466  * megaraid_mbox_display_scb - display SCB information, mostly debug purposes
3467  * @adapter             : controller's soft state
3468  * @scb                 : SCB to be displayed
3469  * @level               : debug level for console print
3470  *
3471  * Diplay information about the given SCB iff the current debug level is
3472  * verbose.
3473  */
3474 static void
3475 megaraid_mbox_display_scb(adapter_t *adapter, scb_t *scb)
3476 {
3477         mbox_ccb_t              *ccb;
3478         struct scsi_cmnd        *scp;
3479         mbox_t                  *mbox;
3480         int                     level;
3481         int                     i;
3482
3483
3484         ccb     = (mbox_ccb_t *)scb->ccb;
3485         scp     = scb->scp;
3486         mbox    = ccb->mbox;
3487
3488         level = CL_DLEVEL3;
3489
3490         con_log(level, (KERN_NOTICE
3491                 "megaraid mailbox: status:%#x cmd:%#x id:%#x ", scb->status,
3492                 mbox->cmd, scb->sno));
3493
3494         con_log(level, ("sec:%#x lba:%#x addr:%#x ld:%d sg:%d\n",
3495                 mbox->numsectors, mbox->lba, mbox->xferaddr, mbox->logdrv,
3496                 mbox->numsge));
3497
3498         if (!scp) return;
3499
3500         con_log(level, (KERN_NOTICE "scsi cmnd: "));
3501
3502         for (i = 0; i < scp->cmd_len; i++) {
3503                 con_log(level, ("%#2.02x ", scp->cmnd[i]));
3504         }
3505
3506         con_log(level, ("\n"));
3507
3508         return;
3509 }
3510
3511
3512 /**
3513  * megaraid_mbox_setup_device_map - manage device ids
3514  * @adapter     : Driver's soft state
3515  *
3516  * Manange the device ids to have an appropraite mapping between the kernel
3517  * scsi addresses and megaraid scsi and logical drive addresses. We export
3518  * scsi devices on their actual addresses, whereas the logical drives are
3519  * exported on a virtual scsi channel.
3520  */
3521 static void
3522 megaraid_mbox_setup_device_map(adapter_t *adapter)
3523 {
3524         uint8_t         c;
3525         uint8_t         t;
3526
3527         /*
3528          * First fill the values on the logical drive channel
3529          */
3530         for (t = 0; t < LSI_MAX_LOGICAL_DRIVES_64LD; t++)
3531                 adapter->device_ids[adapter->max_channel][t] =
3532                         (t < adapter->init_id) ?  t : t - 1;
3533
3534         adapter->device_ids[adapter->max_channel][adapter->init_id] = 0xFF;
3535
3536         /*
3537          * Fill the values on the physical devices channels
3538          */
3539         for (c = 0; c < adapter->max_channel; c++)
3540                 for (t = 0; t < LSI_MAX_LOGICAL_DRIVES_64LD; t++)
3541                         adapter->device_ids[c][t] = (c << 8) | t;
3542 }
3543
3544
3545 /*
3546  * END: internal commands library
3547  */
3548
3549 /*
3550  * START: Interface for the common management module
3551  *
3552  * This is the module, which interfaces with the common mangement module to
3553  * provide support for ioctl and sysfs
3554  */
3555
3556 /**
3557  * megaraid_cmm_register - register with the mangement module
3558  * @adapter             : HBA soft state
3559  *
3560  * Register with the management module, which allows applications to issue
3561  * ioctl calls to the drivers. This interface is used by the management module
3562  * to setup sysfs support as well.
3563  */
3564 static int
3565 megaraid_cmm_register(adapter_t *adapter)
3566 {
3567         mraid_device_t  *raid_dev = ADAP2RAIDDEV(adapter);
3568         mraid_mmadp_t   adp;
3569         scb_t           *scb;
3570         mbox_ccb_t      *ccb;
3571         int             rval;
3572         int             i;
3573
3574         // Allocate memory for the base list of scb for management module.
3575         adapter->uscb_list = kmalloc(sizeof(scb_t) * MBOX_MAX_USER_CMDS,
3576                         GFP_KERNEL);
3577
3578         if (adapter->uscb_list == NULL) {
3579                 con_log(CL_ANN, (KERN_WARNING
3580                         "megaraid: out of memory, %s %d\n", __FUNCTION__,
3581                         __LINE__));
3582                 return -1;
3583         }
3584         memset(adapter->uscb_list, 0, sizeof(scb_t) * MBOX_MAX_USER_CMDS);
3585
3586
3587         // Initialize the synchronization parameters for resources for
3588         // commands for management module
3589         INIT_LIST_HEAD(&adapter->uscb_pool);
3590
3591         spin_lock_init(USER_FREE_LIST_LOCK(adapter));
3592
3593
3594
3595         // link all the packets. Note, CCB for commands, coming from the
3596         // commom management module, mailbox physical address are already
3597         // setup by it. We just need placeholder for that in our local command
3598         // control blocks
3599         for (i = 0; i < MBOX_MAX_USER_CMDS; i++) {
3600
3601                 scb                     = adapter->uscb_list + i;
3602                 ccb                     = raid_dev->uccb_list + i;
3603
3604                 scb->ccb                = (caddr_t)ccb;
3605                 ccb->mbox64             = raid_dev->umbox64 + i;
3606                 ccb->mbox               = &ccb->mbox64->mbox32;
3607                 ccb->raw_mbox           = (uint8_t *)ccb->mbox;
3608
3609                 scb->gp                 = 0;
3610
3611                 // COMMAND ID 0 - (MBOX_MAX_SCSI_CMDS-1) ARE RESERVED FOR
3612                 // COMMANDS COMING FROM IO SUBSYSTEM (MID-LAYER)
3613                 scb->sno                = i + MBOX_MAX_SCSI_CMDS;
3614
3615                 scb->scp                = NULL;
3616                 scb->state              = SCB_FREE;
3617                 scb->dma_direction      = PCI_DMA_NONE;
3618                 scb->dma_type           = MRAID_DMA_NONE;
3619                 scb->dev_channel        = -1;
3620                 scb->dev_target         = -1;
3621
3622                 // put scb in the free pool
3623                 list_add_tail(&scb->list, &adapter->uscb_pool);
3624         }
3625
3626         adp.unique_id           = adapter->unique_id;
3627         adp.drvr_type           = DRVRTYPE_MBOX;
3628         adp.drvr_data           = (unsigned long)adapter;
3629         adp.pdev                = adapter->pdev;
3630         adp.issue_uioc          = megaraid_mbox_mm_handler;
3631         adp.timeout             = MBOX_RESET_WAIT + MBOX_RESET_EXT_WAIT;
3632         adp.max_kioc            = MBOX_MAX_USER_CMDS;
3633
3634         if ((rval = mraid_mm_register_adp(&adp)) != 0) {
3635
3636                 con_log(CL_ANN, (KERN_WARNING
3637                         "megaraid mbox: did not register with CMM\n"));
3638
3639                 kfree(adapter->uscb_list);
3640         }
3641
3642         return rval;
3643 }
3644
3645
3646 /**
3647  * megaraid_cmm_unregister - un-register with the mangement module
3648  * @adapter             : HBA soft state
3649  *
3650  * Un-register with the management module.
3651  * FIXME: mgmt module must return failure for unregister if it has pending
3652  * commands in LLD.
3653  */
3654 static int
3655 megaraid_cmm_unregister(adapter_t *adapter)
3656 {
3657         kfree(adapter->uscb_list);
3658         mraid_mm_unregister_adp(adapter->unique_id);
3659         return 0;
3660 }
3661
3662
3663 /**
3664  * megaraid_mbox_mm_handler - interface for CMM to issue commands to LLD
3665  * @drvr_data           : LLD specific data
3666  * @kioc                : CMM interface packet
3667  * @action              : command action
3668  *
3669  * This routine is invoked whenever the Common Mangement Module (CMM) has a
3670  * command for us. The 'action' parameter specifies if this is a new command
3671  * or otherwise.
3672  */
3673 static int
3674 megaraid_mbox_mm_handler(unsigned long drvr_data, uioc_t *kioc, uint32_t action)
3675 {
3676         adapter_t *adapter;
3677
3678         if (action != IOCTL_ISSUE) {
3679                 con_log(CL_ANN, (KERN_WARNING
3680                         "megaraid: unsupported management action:%#2x\n",
3681                         action));
3682                 return (-ENOTSUPP);
3683         }
3684
3685         adapter = (adapter_t *)drvr_data;
3686
3687         // make sure this adapter is not being detached right now.
3688         if (atomic_read(&adapter->being_detached)) {
3689                 con_log(CL_ANN, (KERN_WARNING
3690                         "megaraid: reject management request, detaching\n"));
3691                 return (-ENODEV);
3692         }
3693
3694         switch (kioc->opcode) {
3695
3696         case GET_ADAP_INFO:
3697
3698                 kioc->status =  gather_hbainfo(adapter, (mraid_hba_info_t *)
3699                                         (unsigned long)kioc->buf_vaddr);
3700
3701                 kioc->done(kioc);
3702
3703                 return kioc->status;
3704
3705         case MBOX_CMD:
3706
3707                 return megaraid_mbox_mm_command(adapter, kioc);
3708
3709         default:
3710                 kioc->status = (-EINVAL);
3711                 kioc->done(kioc);
3712                 return (-EINVAL);
3713         }
3714
3715         return 0;       // not reached
3716 }
3717
3718 /**
3719  * megaraid_mbox_mm_command - issues commands routed through CMM
3720  * @adapter             : HBA soft state
3721  * @kioc                : management command packet
3722  *
3723  * Issues commands, which are routed through the management module.
3724  */
3725 static int
3726 megaraid_mbox_mm_command(adapter_t *adapter, uioc_t *kioc)
3727 {
3728         struct list_head        *head = &adapter->uscb_pool;
3729         mbox64_t                *mbox64;
3730         uint8_t                 *raw_mbox;
3731         scb_t                   *scb;
3732         mbox_ccb_t              *ccb;
3733         unsigned long           flags;
3734
3735         // detach one scb from free pool
3736         spin_lock_irqsave(USER_FREE_LIST_LOCK(adapter), flags);
3737
3738         if (list_empty(head)) { // should never happen because of CMM
3739
3740                 con_log(CL_ANN, (KERN_WARNING
3741                         "megaraid mbox: bug in cmm handler, lost resources\n"));
3742
3743                 spin_unlock_irqrestore(USER_FREE_LIST_LOCK(adapter), flags);
3744
3745                 return (-EINVAL);
3746         }
3747
3748         scb = list_entry(head->next, scb_t, list);
3749         list_del_init(&scb->list);
3750
3751         spin_unlock_irqrestore(USER_FREE_LIST_LOCK(adapter), flags);
3752
3753         scb->state              = SCB_ACTIVE;
3754         scb->dma_type           = MRAID_DMA_NONE;
3755         scb->dma_direction      = PCI_DMA_NONE;
3756
3757         ccb             = (mbox_ccb_t *)scb->ccb;
3758         mbox64          = (mbox64_t *)(unsigned long)kioc->cmdbuf;
3759         raw_mbox        = (uint8_t *)&mbox64->mbox32;
3760
3761         memcpy(ccb->mbox64, mbox64, sizeof(mbox64_t));
3762
3763         scb->gp         = (unsigned long)kioc;
3764
3765         /*
3766          * If it is a logdrv random delete operation, we have to wait till
3767          * there are no outstanding cmds at the fw and then issue it directly
3768          */
3769         if (raw_mbox[0] == FC_DEL_LOGDRV && raw_mbox[2] == OP_DEL_LOGDRV) {
3770
3771                 if (wait_till_fw_empty(adapter)) {
3772                         con_log(CL_ANN, (KERN_NOTICE
3773                                 "megaraid mbox: LD delete, timed out\n"));
3774
3775                         kioc->status = -ETIME;
3776
3777                         scb->status = -1;
3778
3779                         megaraid_mbox_mm_done(adapter, scb);
3780
3781                         return (-ETIME);
3782                 }
3783
3784                 INIT_LIST_HEAD(&scb->list);
3785
3786                 scb->state = SCB_ISSUED;
3787                 if (mbox_post_cmd(adapter, scb) != 0) {
3788
3789                         con_log(CL_ANN, (KERN_NOTICE
3790                                 "megaraid mbox: LD delete, mailbox busy\n"));
3791
3792                         kioc->status = -EBUSY;
3793
3794                         scb->status = -1;
3795
3796                         megaraid_mbox_mm_done(adapter, scb);
3797
3798                         return (-EBUSY);
3799                 }
3800
3801                 return 0;
3802         }
3803
3804         // put the command on the pending list and execute
3805         megaraid_mbox_runpendq(adapter, scb);
3806
3807         return 0;
3808 }
3809
3810
3811 static int
3812 wait_till_fw_empty(adapter_t *adapter)
3813 {
3814         unsigned long   flags = 0;
3815         int             i;
3816
3817
3818         /*
3819          * Set the quiescent flag to stop issuing cmds to FW.
3820          */
3821         spin_lock_irqsave(&adapter->lock, flags);
3822         adapter->quiescent++;
3823         spin_unlock_irqrestore(&adapter->lock, flags);
3824
3825         /*
3826          * Wait till there are no more cmds outstanding at FW. Try for at most
3827          * 60 seconds
3828          */
3829         for (i = 0; i < 60 && adapter->outstanding_cmds; i++) {
3830                 con_log(CL_DLEVEL1, (KERN_INFO
3831                         "megaraid: FW has %d pending commands\n",
3832                         adapter->outstanding_cmds));
3833
3834                 msleep(1000);
3835         }
3836
3837         return adapter->outstanding_cmds;
3838 }
3839
3840
3841 /**
3842  * megaraid_mbox_mm_done - callback for CMM commands
3843  * @adapter     : HBA soft state
3844  * @scb         : completed command
3845  *
3846  * Callback routine for internal commands originated from the management
3847  * module.
3848  */
3849 static void
3850 megaraid_mbox_mm_done(adapter_t *adapter, scb_t *scb)
3851 {
3852         uioc_t                  *kioc;
3853         mbox64_t                *mbox64;
3854         uint8_t                 *raw_mbox;
3855         unsigned long           flags;
3856
3857         kioc                    = (uioc_t *)scb->gp;
3858         mbox64                  = (mbox64_t *)(unsigned long)kioc->cmdbuf;
3859         mbox64->mbox32.status   = scb->status;
3860         raw_mbox                = (uint8_t *)&mbox64->mbox32;
3861
3862
3863         // put scb in the free pool
3864         scb->state      = SCB_FREE;
3865         scb->scp        = NULL;
3866
3867         spin_lock_irqsave(USER_FREE_LIST_LOCK(adapter), flags);
3868
3869         list_add(&scb->list, &adapter->uscb_pool);
3870
3871         spin_unlock_irqrestore(USER_FREE_LIST_LOCK(adapter), flags);
3872
3873         // if a delete logical drive operation succeeded, restart the
3874         // controller
3875         if (raw_mbox[0] == FC_DEL_LOGDRV && raw_mbox[2] == OP_DEL_LOGDRV) {
3876
3877                 adapter->quiescent--;
3878
3879                 megaraid_mbox_runpendq(adapter, NULL);
3880         }
3881
3882         kioc->done(kioc);
3883
3884         return;
3885 }
3886
3887
3888 /**
3889  * gather_hbainfo - HBA characteristics for the applications
3890  * @adapter             : HBA soft state
3891  * @hinfo               : pointer to the caller's host info strucuture
3892  */
3893 static int
3894 gather_hbainfo(adapter_t *adapter, mraid_hba_info_t *hinfo)
3895 {
3896         uint8_t dmajor;
3897
3898         dmajor                  = megaraid_mbox_version[0];
3899
3900         hinfo->pci_vendor_id    = adapter->pdev->vendor;
3901         hinfo->pci_device_id    = adapter->pdev->device;
3902         hinfo->subsys_vendor_id = adapter->pdev->subsystem_vendor;
3903         hinfo->subsys_device_id = adapter->pdev->subsystem_device;
3904
3905         hinfo->pci_bus          = adapter->pdev->bus->number;
3906         hinfo->pci_dev_fn       = adapter->pdev->devfn;
3907         hinfo->pci_slot         = PCI_SLOT(adapter->pdev->devfn);
3908         hinfo->irq              = adapter->host->irq;
3909         hinfo->baseport         = ADAP2RAIDDEV(adapter)->baseport;
3910
3911         hinfo->unique_id        = (hinfo->pci_bus << 8) | adapter->pdev->devfn;
3912         hinfo->host_no          = adapter->host->host_no;
3913
3914         return 0;
3915 }
3916
3917 /*
3918  * END: Interface for the common management module
3919  */
3920
3921
3922
3923 /**
3924  * megaraid_sysfs_alloc_resources - allocate sysfs related resources
3925  * @adapter     : controller's soft state
3926  *
3927  * Allocate packets required to issue FW calls whenever the sysfs attributes
3928  * are read. These attributes would require up-to-date information from the
3929  * FW. Also set up resources for mutual exclusion to share these resources and
3930  * the wait queue.
3931  *
3932  * Return 0 on success.
3933  * Return -ERROR_CODE on failure.
3934  */
3935 static int
3936 megaraid_sysfs_alloc_resources(adapter_t *adapter)
3937 {
3938         mraid_device_t  *raid_dev = ADAP2RAIDDEV(adapter);
3939         int             rval = 0;
3940
3941         raid_dev->sysfs_uioc = kmalloc(sizeof(uioc_t), GFP_KERNEL);
3942
3943         raid_dev->sysfs_mbox64 = kmalloc(sizeof(mbox64_t), GFP_KERNEL);
3944
3945         raid_dev->sysfs_buffer = pci_alloc_consistent(adapter->pdev,
3946                         PAGE_SIZE, &raid_dev->sysfs_buffer_dma);
3947
3948         if (!raid_dev->sysfs_uioc || !raid_dev->sysfs_mbox64 ||
3949                 !raid_dev->sysfs_buffer) {
3950
3951                 con_log(CL_ANN, (KERN_WARNING
3952                         "megaraid: out of memory, %s %d\n", __FUNCTION__,
3953                         __LINE__));
3954
3955                 rval = -ENOMEM;
3956
3957                 megaraid_sysfs_free_resources(adapter);
3958         }
3959
3960         sema_init(&raid_dev->sysfs_sem, 1);
3961
3962         init_waitqueue_head(&raid_dev->sysfs_wait_q);
3963
3964         return rval;
3965 }
3966
3967
3968 /**
3969  * megaraid_sysfs_free_resources - free sysfs related resources
3970  * @adapter     : controller's soft state
3971  *
3972  * Free packets allocated for sysfs FW commands
3973  */
3974 static void
3975 megaraid_sysfs_free_resources(adapter_t *adapter)
3976 {
3977         mraid_device_t  *raid_dev = ADAP2RAIDDEV(adapter);
3978
3979         kfree(raid_dev->sysfs_uioc);
3980         kfree(raid_dev->sysfs_mbox64);
3981
3982         if (raid_dev->sysfs_buffer) {
3983                 pci_free_consistent(adapter->pdev, PAGE_SIZE,
3984                         raid_dev->sysfs_buffer, raid_dev->sysfs_buffer_dma);
3985         }
3986 }
3987
3988
3989 /**
3990  * megaraid_sysfs_get_ldmap_done - callback for get ldmap
3991  * @uioc        : completed packet
3992  *
3993  * Callback routine called in the ISR/tasklet context for get ldmap call
3994  */
3995 static void
3996 megaraid_sysfs_get_ldmap_done(uioc_t *uioc)
3997 {
3998         adapter_t       *adapter = (adapter_t *)uioc->buf_vaddr;
3999         mraid_device_t  *raid_dev = ADAP2RAIDDEV(adapter);
4000
4001         uioc->status = 0;
4002
4003         wake_up(&raid_dev->sysfs_wait_q);
4004 }
4005
4006
4007 /**
4008  * megaraid_sysfs_get_ldmap_timeout - timeout handling for get ldmap
4009  * @data        : timed out packet
4010  *
4011  * Timeout routine to recover and return to application, in case the adapter
4012  * has stopped responding. A timeout of 60 seconds for this command seems like
4013  * a good value.
4014  */
4015 static void
4016 megaraid_sysfs_get_ldmap_timeout(unsigned long data)
4017 {
4018         uioc_t          *uioc = (uioc_t *)data;
4019         adapter_t       *adapter = (adapter_t *)uioc->buf_vaddr;
4020         mraid_device_t  *raid_dev = ADAP2RAIDDEV(adapter);
4021
4022         uioc->status = -ETIME;
4023
4024         wake_up(&raid_dev->sysfs_wait_q);
4025 }
4026
4027
4028 /**
4029  * megaraid_sysfs_get_ldmap - get update logical drive map
4030  * @adapter     : controller's soft state
4031  *
4032  * This routine will be called whenever user reads the logical drive
4033  * attributes, go get the current logical drive mapping table from the
4034  * firmware. We use the managment API's to issue commands to the controller.
4035  *
4036  * NOTE: The commands issuance functionality is not generalized and
4037  * implemented in context of "get ld map" command only. If required, the
4038  * command issuance logical can be trivially pulled out and implemented as a
4039  * standalone libary. For now, this should suffice since there is no other
4040  * user of this interface.
4041  *
4042  * Return 0 on success.
4043  * Return -1 on failure.
4044  */
4045 static int
4046 megaraid_sysfs_get_ldmap(adapter_t *adapter)
4047 {
4048         mraid_device_t          *raid_dev = ADAP2RAIDDEV(adapter);
4049         uioc_t                  *uioc;
4050         mbox64_t                *mbox64;
4051         mbox_t                  *mbox;
4052         char                    *raw_mbox;
4053         struct timer_list       sysfs_timer;
4054         struct timer_list       *timerp;
4055         caddr_t                 ldmap;
4056         int                     rval = 0;
4057
4058         /*
4059          * Allow only one read at a time to go through the sysfs attributes
4060          */
4061         down(&raid_dev->sysfs_sem);
4062
4063         uioc    = raid_dev->sysfs_uioc;
4064         mbox64  = raid_dev->sysfs_mbox64;
4065         ldmap   = raid_dev->sysfs_buffer;
4066
4067         memset(uioc, 0, sizeof(uioc_t));
4068         memset(mbox64, 0, sizeof(mbox64_t));
4069         memset(ldmap, 0, sizeof(raid_dev->curr_ldmap));
4070
4071         mbox            = &mbox64->mbox32;
4072         raw_mbox        = (char *)mbox;
4073         uioc->cmdbuf    = (uint64_t)(unsigned long)mbox64;
4074         uioc->buf_vaddr = (caddr_t)adapter;
4075         uioc->status    = -ENODATA;
4076         uioc->done      = megaraid_sysfs_get_ldmap_done;
4077
4078         /*
4079          * Prepare the mailbox packet to get the current logical drive mapping
4080          * table
4081          */
4082         mbox->xferaddr = (uint32_t)raid_dev->sysfs_buffer_dma;
4083
4084         raw_mbox[0] = FC_DEL_LOGDRV;
4085         raw_mbox[2] = OP_GET_LDID_MAP;
4086
4087         /*
4088          * Setup a timer to recover from a non-responding controller
4089          */
4090         timerp  = &sysfs_timer;
4091         init_timer(timerp);
4092
4093         timerp->function        = megaraid_sysfs_get_ldmap_timeout;
4094         timerp->data            = (unsigned long)uioc;
4095         timerp->expires         = jiffies + 60 * HZ;
4096
4097         add_timer(timerp);
4098
4099         /*
4100          * Send the command to the firmware
4101          */
4102         rval = megaraid_mbox_mm_command(adapter, uioc);
4103
4104         if (rval == 0) {        // command successfully issued
4105                 wait_event(raid_dev->sysfs_wait_q, (uioc->status != -ENODATA));
4106
4107                 /*
4108                  * Check if the command timed out
4109                  */
4110                 if (uioc->status == -ETIME) {
4111                         con_log(CL_ANN, (KERN_NOTICE
4112                                 "megaraid: sysfs get ld map timed out\n"));
4113
4114                         rval = -ETIME;
4115                 }
4116                 else {
4117                         rval = mbox->status;
4118                 }
4119
4120                 if (rval == 0) {
4121                         memcpy(raid_dev->curr_ldmap, ldmap,
4122                                 sizeof(raid_dev->curr_ldmap));
4123                 }
4124                 else {
4125                         con_log(CL_ANN, (KERN_NOTICE
4126                                 "megaraid: get ld map failed with %x\n", rval));
4127                 }
4128         }
4129         else {
4130                 con_log(CL_ANN, (KERN_NOTICE
4131                         "megaraid: could not issue ldmap command:%x\n", rval));
4132         }
4133
4134
4135         del_timer_sync(timerp);
4136
4137         up(&raid_dev->sysfs_sem);
4138
4139         return rval;
4140 }
4141
4142
4143 /**
4144  * megaraid_sysfs_show_app_hndl - display application handle for this adapter
4145  * @cdev        : class device object representation for the host
4146  * @buf         : buffer to send data to
4147  *
4148  * Display the handle used by the applications while executing management
4149  * tasks on the adapter. We invoke a management module API to get the adapter
4150  * handle, since we do not interface with applications directly.
4151  */
4152 static ssize_t
4153 megaraid_sysfs_show_app_hndl(struct class_device *cdev, char *buf)
4154 {
4155         struct Scsi_Host *shost = class_to_shost(cdev);
4156         adapter_t       *adapter = (adapter_t *)SCSIHOST2ADAP(shost);
4157         uint32_t        app_hndl;
4158
4159         app_hndl = mraid_mm_adapter_app_handle(adapter->unique_id);
4160
4161         return snprintf(buf, 8, "%u\n", app_hndl);
4162 }
4163
4164
4165 /**
4166  * megaraid_sysfs_show_ldnum - display the logical drive number for this device
4167  * @dev         : device object representation for the scsi device
4168  * @attr        : device attribute to show
4169  * @buf         : buffer to send data to
4170  *
4171  * Display the logical drive number for the device in question, if it a valid
4172  * logical drive. For physical devices, "-1" is returned.
4173  *
4174  * The logical drive number is displayed in following format:
4175  *
4176  * <SCSI ID> <LD NUM> <LD STICKY ID> <APP ADAPTER HANDLE>
4177  *
4178  *   <int>     <int>       <int>            <int>
4179  */
4180 static ssize_t
4181 megaraid_sysfs_show_ldnum(struct device *dev, struct device_attribute *attr, char *buf)
4182 {
4183         struct scsi_device *sdev = to_scsi_device(dev);
4184         adapter_t       *adapter = (adapter_t *)SCSIHOST2ADAP(sdev->host);
4185         mraid_device_t  *raid_dev = ADAP2RAIDDEV(adapter);
4186         int             scsi_id = -1;
4187         int             logical_drv = -1;
4188         int             ldid_map = -1;
4189         uint32_t        app_hndl = 0;
4190         int             mapped_sdev_id;
4191         int             rval;
4192         int             i;
4193
4194         if (raid_dev->random_del_supported &&
4195                         MRAID_IS_LOGICAL_SDEV(adapter, sdev)) {
4196
4197                 rval = megaraid_sysfs_get_ldmap(adapter);
4198                 if (rval == 0) {
4199
4200                         for (i = 0; i < MAX_LOGICAL_DRIVES_40LD; i++) {
4201
4202                                 mapped_sdev_id = sdev->id;
4203
4204                                 if (sdev->id > adapter->init_id) {
4205                                         mapped_sdev_id -= 1;
4206                                 }
4207
4208                                 if (raid_dev->curr_ldmap[i] == mapped_sdev_id) {
4209
4210                                         scsi_id = sdev->id;
4211
4212                                         logical_drv = i;
4213
4214                                         ldid_map = raid_dev->curr_ldmap[i];
4215
4216                                         app_hndl = mraid_mm_adapter_app_handle(
4217                                                         adapter->unique_id);
4218
4219                                         break;
4220                                 }
4221                         }
4222                 }
4223                 else {
4224                         con_log(CL_ANN, (KERN_NOTICE
4225                                 "megaraid: sysfs get ld map failed: %x\n",
4226                                 rval));
4227                 }
4228         }
4229
4230         return snprintf(buf, 36, "%d %d %d %d\n", scsi_id, logical_drv,
4231                         ldid_map, app_hndl);
4232 }
4233
4234
4235 /*
4236  * END: Mailbox Low Level Driver
4237  */
4238 module_init(megaraid_init);
4239 module_exit(megaraid_exit);
4240
4241 /* vim: set ts=8 sw=8 tw=78 ai si: */