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      : v2.20.4.6 (Mar 07 2005)
  14  *
  15  * Authors:
  16  *      Atul Mukker             <Atul.Mukker@lsil.com>
  17  *      Sreenivas Bagalkote     <Sreenivas.Bagalkote@lsil.com>
  18  *      Manoj Jose              <Manoj.Jose@lsil.com>
  19  *
  20  * List of supported controllers
  21  *
  22  * OEM  Product Name                    VID     DID     SSVID   SSID
  23  * ---  ------------                    ---     ---     ----    ----
  24  * Dell PERC3/QC                        101E    1960    1028    0471
  25  * Dell PERC3/DC                        101E    1960    1028    0493
  26  * Dell PERC3/SC                        101E    1960    1028    0475
  27  * Dell PERC3/Di                        1028    1960    1028    0123
  28  * Dell PERC4/SC                        1000    1960    1028    0520
  29  * Dell PERC4/DC                        1000    1960    1028    0518
  30  * Dell PERC4/QC                        1000    0407    1028    0531
  31  * Dell PERC4/Di                        1028    000F    1028    014A
  32  * Dell PERC 4e/Si                      1028    0013    1028    016c
  33  * Dell PERC 4e/Di                      1028    0013    1028    016d
  34  * Dell PERC 4e/Di                      1028    0013    1028    016e
  35  * Dell PERC 4e/Di                      1028    0013    1028    016f
  36  * Dell PERC 4e/Di                      1028    0013    1028    0170
  37  * Dell PERC 4e/DC                      1000    0408    1028    0002
  38  * Dell PERC 4e/SC                      1000    0408    1028    0001
  39  *
  40  *
  41  * LSI MegaRAID SCSI 320-0              1000    1960    1000    A520
  42  * LSI MegaRAID SCSI 320-1              1000    1960    1000    0520
  43  * LSI MegaRAID SCSI 320-2              1000    1960    1000    0518
  44  * LSI MegaRAID SCSI 320-0X             1000    0407    1000    0530
  45  * LSI MegaRAID SCSI 320-2X             1000    0407    1000    0532
  46  * LSI MegaRAID SCSI 320-4X             1000    0407    1000    0531
  47  * LSI MegaRAID SCSI 320-1E             1000    0408    1000    0001
  48  * LSI MegaRAID SCSI 320-2E             1000    0408    1000    0002
  49  * LSI MegaRAID SATA 150-4              1000    1960    1000    4523
  50  * LSI MegaRAID SATA 150-6              1000    1960    1000    0523
  51  * LSI MegaRAID SATA 300-4X             1000    0409    1000    3004
  52  * LSI MegaRAID SATA 300-8X             1000    0409    1000    3008
  53  *
  54  * INTEL RAID Controller SRCU42X        1000    0407    8086    0532
  55  * INTEL RAID Controller SRCS16         1000    1960    8086    0523
  56  * INTEL RAID Controller SRCU42E        1000    0408    8086    0002
  57  * INTEL RAID Controller SRCZCRX        1000    0407    8086    0530
  58  * INTEL RAID Controller SRCS28X        1000    0409    8086    3008
  59  * INTEL RAID Controller SROMBU42E      1000    0408    8086    3431
  60  * INTEL RAID Controller SROMBU42E      1000    0408    8086    3499
  61  * INTEL RAID Controller SRCU51L        1000    1960    8086    0520
  62  *
  63  * FSC  MegaRAID PCI Express ROMB       1000    0408    1734    1065
  64  *
  65  * ACER MegaRAID ROMB-2E                1000    0408    1025    004D
  66  *
  67  * NEC  MegaRAID PCI Express ROMB       1000    0408    1033    8287
  68  *
  69  * For history of changes, see Documentation/ChangeLog.megaraid
  70  */
  71
  72 #include "megaraid_mbox.h"
  73
  74 static int megaraid_init(void);
  75 static void megaraid_exit(void);
  76
  77 static int megaraid_probe_one(struct pci_dev*, const struct pci_device_id *);
  78 static void megaraid_detach_one(struct pci_dev *);
  79 static void megaraid_mbox_shutdown(struct device *);
  80
  81 static int megaraid_io_attach(adapter_t *);
  82 static void megaraid_io_detach(adapter_t *);
  83
  84 static int megaraid_init_mbox(adapter_t *);
  85 static void megaraid_fini_mbox(adapter_t *);
  86
  87 static int megaraid_alloc_cmd_packets(adapter_t *);
  88 static void megaraid_free_cmd_packets(adapter_t *);
  89
  90 static int megaraid_mbox_setup_dma_pools(adapter_t *);
  91 static void megaraid_mbox_teardown_dma_pools(adapter_t *);
  92
  93 static int megaraid_sysfs_alloc_resources(adapter_t *);
  94 static void megaraid_sysfs_free_resources(adapter_t *);
  95
  96 static int megaraid_abort_handler(struct scsi_cmnd *);
  97 static int megaraid_reset_handler(struct scsi_cmnd *);
  98
  99 static int mbox_post_sync_cmd(adapter_t *, uint8_t []);
 100 static int mbox_post_sync_cmd_fast(adapter_t *, uint8_t []);
 101 static int megaraid_busywait_mbox(mraid_device_t *);
 102 static int megaraid_mbox_product_info(adapter_t *);
 103 static int megaraid_mbox_extended_cdb(adapter_t *);
 104 static int megaraid_mbox_support_ha(adapter_t *, uint16_t *);
 105 static int megaraid_mbox_support_random_del(adapter_t *);
 106 static int megaraid_mbox_get_max_sg(adapter_t *);
 107 static void megaraid_mbox_enum_raid_scsi(adapter_t *);
 108 static void megaraid_mbox_flush_cache(adapter_t *);
 109
 110 static void megaraid_mbox_display_scb(adapter_t *, scb_t *);
 111 static void megaraid_mbox_setup_device_map(adapter_t *);
 112
 113 static int megaraid_queue_command(struct scsi_cmnd *,
 114                 void (*)(struct scsi_cmnd *));
 115 static scb_t *megaraid_mbox_build_cmd(adapter_t *, struct scsi_cmnd *, int *);
 116 static void megaraid_mbox_runpendq(adapter_t *, scb_t *);
 117 static void megaraid_mbox_prepare_pthru(adapter_t *, scb_t *,
 118                 struct scsi_cmnd *);
 119 static void megaraid_mbox_prepare_epthru(adapter_t *, scb_t *,
 120                 struct scsi_cmnd *);
 121
 122 static irqreturn_t megaraid_isr(int, void *, struct pt_regs *);
 123
 124 static void megaraid_mbox_dpc(unsigned long);
 125
 126 static ssize_t megaraid_sysfs_show_app_hndl(struct class_device *, char *);
 127 static ssize_t megaraid_sysfs_show_ldnum(struct device *, struct device_attribute *attr, char *);
 128
 129 static int megaraid_cmm_register(adapter_t *);
 130 static int megaraid_cmm_unregister(adapter_t *);
 131 static int megaraid_mbox_mm_handler(unsigned long, uioc_t *, uint32_t);
 132 static int megaraid_mbox_mm_command(adapter_t *, uioc_t *);
 133 static void megaraid_mbox_mm_done(adapter_t *, scb_t *);
 134 static int gather_hbainfo(adapter_t *, mraid_hba_info_t *);
 135 static int wait_till_fw_empty(adapter_t *);
 136
 137
 138
 139 MODULE_AUTHOR("LSI Logic Corporation");
 140 MODULE_DESCRIPTION("LSI Logic MegaRAID Mailbox Driver");
 141 MODULE_LICENSE("GPL");
 142 MODULE_VERSION(MEGARAID_VERSION);
 143
 144 /*
 145  * ### modules parameters for driver ###
 146  */
 147
 148 /**
 149  * Set to enable driver to expose unconfigured disk to kernel
 150  */
 151 static int megaraid_expose_unconf_disks = 0;
 152 module_param_named(unconf_disks, megaraid_expose_unconf_disks, int, 0);
 153 MODULE_PARM_DESC(unconf_disks,
 154         "Set to expose unconfigured disks to kernel (default=0)");
 155
 156 /**
 157  * driver wait time if the adapter's mailbox is busy
 158  */
 159 static unsigned int max_mbox_busy_wait = MBOX_BUSY_WAIT;
 160 module_param_named(busy_wait, max_mbox_busy_wait, int, 0);
 161 MODULE_PARM_DESC(busy_wait,
 162         "Max wait for mailbox in microseconds if busy (default=10)");
 163
 164 /**
 165  * number of sectors per IO command
 166  */
 167 static unsigned int megaraid_max_sectors = MBOX_MAX_SECTORS;
 168 module_param_named(max_sectors, megaraid_max_sectors, int, 0);
 169 MODULE_PARM_DESC(max_sectors,
 170         "Maximum number of sectors per IO command (default=128)");
 171
 172 /**
 173  * number of commands per logical unit
 174  */
 175 static unsigned int megaraid_cmd_per_lun = MBOX_DEF_CMD_PER_LUN;
 176 module_param_named(cmd_per_lun, megaraid_cmd_per_lun, int, 0);
 177 MODULE_PARM_DESC(cmd_per_lun,
 178         "Maximum number of commands per logical unit (default=64)");
 179
 180
 181 /**
 182  * Fast driver load option, skip scanning for physical devices during load.
 183  * This would result in non-disk devices being skipped during driver load
 184  * time. These can be later added though, using /proc/scsi/scsi
 185  */
 186 static unsigned int megaraid_fast_load = 0;
 187 module_param_named(fast_load, megaraid_fast_load, int, 0);
 188 MODULE_PARM_DESC(fast_load,
 189         "Faster loading of the driver, skips physical devices! (default=0)");
 190
 191
 192 /**
 193  * mraid_debug level - threshold for amount of information to be displayed by
 194  * the driver. This level can be changed through modules parameters, ioctl or
 195  * sysfs/proc interface. By default, print the announcement messages only.
 196  */
 197 int mraid_debug_level = CL_ANN;
 198 module_param_named(debug_level, mraid_debug_level, int, 0);
 199 MODULE_PARM_DESC(debug_level, "Debug level for driver (default=0)");
 200
 201 /*
 202  * ### global data ###
 203  */
 204 static uint8_t megaraid_mbox_version[8] =
 205         { 0x02, 0x20, 0x04, 0x06, 3, 7, 20, 5 };
 206
 207
 208 /*
 209  * PCI table for all supported controllers.
 210  */
 211 static struct pci_device_id pci_id_table_g[] =  {
 212         {
 213                 PCI_VENDOR_ID_DELL,
 214                 PCI_DEVICE_ID_PERC4_DI_DISCOVERY,
 215                 PCI_VENDOR_ID_DELL,
 216                 PCI_SUBSYS_ID_PERC4_DI_DISCOVERY,
 217         },
 218         {
 219                 PCI_VENDOR_ID_LSI_LOGIC,
 220                 PCI_DEVICE_ID_PERC4_SC,
 221                 PCI_VENDOR_ID_DELL,
 222                 PCI_SUBSYS_ID_PERC4_SC,
 223         },
 224         {
 225                 PCI_VENDOR_ID_LSI_LOGIC,
 226                 PCI_DEVICE_ID_PERC4_DC,
 227                 PCI_VENDOR_ID_DELL,
 228                 PCI_SUBSYS_ID_PERC4_DC,
 229         },
 230         {
 231                 PCI_VENDOR_ID_LSI_LOGIC,
 232                 PCI_DEVICE_ID_VERDE,
 233                 PCI_ANY_ID,
 234                 PCI_ANY_ID,
 235         },
 236         {
 237                 PCI_VENDOR_ID_DELL,
 238                 PCI_DEVICE_ID_PERC4_DI_EVERGLADES,
 239                 PCI_VENDOR_ID_DELL,
 240                 PCI_SUBSYS_ID_PERC4_DI_EVERGLADES,
 241         },
 242         {
 243                 PCI_VENDOR_ID_DELL,
 244                 PCI_DEVICE_ID_PERC4E_SI_BIGBEND,
 245                 PCI_VENDOR_ID_DELL,
 246                 PCI_SUBSYS_ID_PERC4E_SI_BIGBEND,
 247         },
 248         {
 249                 PCI_VENDOR_ID_DELL,
 250                 PCI_DEVICE_ID_PERC4E_DI_KOBUK,
 251                 PCI_VENDOR_ID_DELL,
 252                 PCI_SUBSYS_ID_PERC4E_DI_KOBUK,
 253         },
 254         {
 255                 PCI_VENDOR_ID_DELL,
 256                 PCI_DEVICE_ID_PERC4E_DI_CORVETTE,
 257                 PCI_VENDOR_ID_DELL,
 258                 PCI_SUBSYS_ID_PERC4E_DI_CORVETTE,
 259         },
 260         {
 261                 PCI_VENDOR_ID_DELL,
 262                 PCI_DEVICE_ID_PERC4E_DI_EXPEDITION,
 263                 PCI_VENDOR_ID_DELL,
 264                 PCI_SUBSYS_ID_PERC4E_DI_EXPEDITION,
 265         },
 266         {
 267                 PCI_VENDOR_ID_DELL,
 268                 PCI_DEVICE_ID_PERC4E_DI_GUADALUPE,
 269                 PCI_VENDOR_ID_DELL,
 270                 PCI_SUBSYS_ID_PERC4E_DI_GUADALUPE,
 271         },
 272         {
 273                 PCI_VENDOR_ID_LSI_LOGIC,
 274                 PCI_DEVICE_ID_DOBSON,
 275                 PCI_ANY_ID,
 276                 PCI_ANY_ID,
 277         },
 278         {
 279                 PCI_VENDOR_ID_AMI,
 280                 PCI_DEVICE_ID_AMI_MEGARAID3,
 281                 PCI_VENDOR_ID_DELL,
 282                 PCI_SUBSYS_ID_PERC3_QC,
 283         },
 284         {
 285                 PCI_VENDOR_ID_AMI,
 286                 PCI_DEVICE_ID_AMI_MEGARAID3,
 287                 PCI_VENDOR_ID_DELL,
 288                 PCI_SUBSYS_ID_PERC3_DC,
 289         },
 290         {
 291                 PCI_VENDOR_ID_AMI,
 292                 PCI_DEVICE_ID_AMI_MEGARAID3,
 293                 PCI_VENDOR_ID_DELL,
 294                 PCI_SUBSYS_ID_PERC3_SC,
 295         },
 296         {
 297                 PCI_VENDOR_ID_AMI,
 298                 PCI_DEVICE_ID_AMI_MEGARAID3,
 299                 PCI_VENDOR_ID_AMI,
 300                 PCI_SUBSYS_ID_PERC3_SC,
 301         },
 302         {
 303                 PCI_VENDOR_ID_AMI,
 304                 PCI_DEVICE_ID_AMI_MEGARAID3,
 305                 PCI_VENDOR_ID_AMI,
 306                 PCI_SUBSYS_ID_PERC3_DC,
 307         },
 308         {
 309                 PCI_VENDOR_ID_LSI_LOGIC,
 310                 PCI_DEVICE_ID_MEGARAID_SCSI_320_0,
 311                 PCI_VENDOR_ID_LSI_LOGIC,
 312                 PCI_SUBSYS_ID_MEGARAID_SCSI_320_0,
 313         },
 314         {
 315                 PCI_VENDOR_ID_LSI_LOGIC,
 316                 PCI_DEVICE_ID_MEGARAID_SCSI_320_1,
 317                 PCI_VENDOR_ID_LSI_LOGIC,
 318                 PCI_SUBSYS_ID_MEGARAID_SCSI_320_1,
 319         },
 320         {
 321                 PCI_VENDOR_ID_LSI_LOGIC,
 322                 PCI_DEVICE_ID_MEGARAID_SCSI_320_2,
 323                 PCI_VENDOR_ID_LSI_LOGIC,
 324                 PCI_SUBSYS_ID_MEGARAID_SCSI_320_2,
 325         },
 326         {
 327                 PCI_VENDOR_ID_LSI_LOGIC,
 328                 PCI_DEVICE_ID_MEGARAID_I4_133_RAID,
 329                 PCI_VENDOR_ID_LSI_LOGIC,
 330                 PCI_SUBSYS_ID_MEGARAID_I4_133_RAID,
 331         },
 332         {
 333                 PCI_VENDOR_ID_LSI_LOGIC,
 334                 PCI_DEVICE_ID_MEGARAID_SATA_150_4,
 335                 PCI_VENDOR_ID_LSI_LOGIC,
 336                 PCI_SUBSYS_ID_MEGARAID_SATA_150_4,
 337         },
 338         {
 339                 PCI_VENDOR_ID_LSI_LOGIC,
 340                 PCI_DEVICE_ID_MEGARAID_SATA_150_6,
 341                 PCI_VENDOR_ID_LSI_LOGIC,
 342                 PCI_SUBSYS_ID_MEGARAID_SATA_150_6,
 343         },
 344         {
 345                 PCI_VENDOR_ID_LSI_LOGIC,
 346                 PCI_DEVICE_ID_LINDSAY,
 347                 PCI_ANY_ID,
 348                 PCI_ANY_ID,
 349         },
 350         {
 351                 PCI_VENDOR_ID_LSI_LOGIC,
 352                 PCI_DEVICE_ID_INTEL_RAID_SRCS16,
 353                 PCI_VENDOR_ID_INTEL,
 354                 PCI_SUBSYS_ID_INTEL_RAID_SRCS16,
 355         },
 356         {
 357                 PCI_VENDOR_ID_LSI_LOGIC,
 358                 PCI_DEVICE_ID_INTEL_RAID_SRCU41L_LAKE_SHETEK,
 359                 PCI_VENDOR_ID_INTEL,
 360                 PCI_SUBSYS_ID_INTEL_RAID_SRCU41L_LAKE_SHETEK,
 361         },
 362         {0}     /* Terminating entry */
 363 };
 364 MODULE_DEVICE_TABLE(pci, pci_id_table_g);
 365
 366
 367 static struct pci_driver megaraid_pci_driver_g = {
 368         .name           = "megaraid",
 369         .id_table       = pci_id_table_g,
 370         .probe          = megaraid_probe_one,
 371         .remove         = __devexit_p(megaraid_detach_one),
 372         .driver         = {
 373                 .shutdown       = megaraid_mbox_shutdown,
 374         }
 375 };
 376
 377
 378
 379 // definitions for the device attributes for exporting logical drive number
 380 // for a scsi address (Host, Channel, Id, Lun)
 381
 382 CLASS_DEVICE_ATTR(megaraid_mbox_app_hndl, S_IRUSR, megaraid_sysfs_show_app_hndl,
 383                 NULL);
 384
 385 // Host template initializer for megaraid mbox sysfs device attributes
 386 static struct class_device_attribute *megaraid_shost_attrs[] = {
 387         &class_device_attr_megaraid_mbox_app_hndl,
 388         NULL,
 389 };
 390
 391
 392 DEVICE_ATTR(megaraid_mbox_ld, S_IRUSR, megaraid_sysfs_show_ldnum, NULL);
 393
 394 // Host template initializer for megaraid mbox sysfs device attributes
 395 static struct device_attribute *megaraid_sdev_attrs[] = {
 396         &dev_attr_megaraid_mbox_ld,
 397         NULL,
 398 };
 399
 400
 401 /*
 402  * Scsi host template for megaraid unified driver
 403  */
 404 static struct scsi_host_template megaraid_template_g = {
 405         .module                         = THIS_MODULE,
 406         .name                           = "LSI Logic MegaRAID driver",
 407         .proc_name                      = "megaraid",
 408         .queuecommand                   = megaraid_queue_command,
 409         .eh_abort_handler               = megaraid_abort_handler,
 410         .eh_device_reset_handler        = megaraid_reset_handler,
 411         .eh_bus_reset_handler           = megaraid_reset_handler,
 412         .eh_host_reset_handler          = megaraid_reset_handler,
 413         .use_clustering                 = ENABLE_CLUSTERING,
 414         .sdev_attrs                     = megaraid_sdev_attrs,
 415         .shost_attrs                    = megaraid_shost_attrs,
 416 };
 417
 418
 419 /**
 420  * megaraid_init - module load hook
 421  *
 422  * We register ourselves as hotplug enabled module and let PCI subsystem
 423  * discover our adaters
 424  **/
 425 static int __init
 426 megaraid_init(void)
 427 {
 428         int     rval;
 429
 430         // Announce the driver version
 431         con_log(CL_ANN, (KERN_INFO "megaraid: %s %s\n", MEGARAID_VERSION,
 432                 MEGARAID_EXT_VERSION));
 433
 434         // check validity of module parameters
 435         if (megaraid_cmd_per_lun > MBOX_MAX_SCSI_CMDS) {
 436
 437                 con_log(CL_ANN, (KERN_WARNING
 438                         "megaraid mailbox: max commands per lun reset to %d\n",
 439                         MBOX_MAX_SCSI_CMDS));
 440
 441                 megaraid_cmd_per_lun = MBOX_MAX_SCSI_CMDS;
 442         }
 443
 444
 445         // register as a PCI hot-plug driver module
 446         rval = pci_register_driver(&megaraid_pci_driver_g);
 447         if (rval < 0) {
 448                 con_log(CL_ANN, (KERN_WARNING
 449                         "megaraid: could not register hotplug support.\n"));
 450         }
 451
 452         return rval;
 453 }
 454
 455
 456 /**
 457  * megaraid_exit - driver unload entry point
 458  *
 459  * We simply unwrap the megaraid_init routine here
 460  */
 461 static void __exit
 462 megaraid_exit(void)
 463 {
 464         con_log(CL_DLEVEL1, (KERN_NOTICE "megaraid: unloading framework\n"));
 465
 466         // unregister as PCI hotplug driver
 467         pci_unregister_driver(&megaraid_pci_driver_g);
 468
 469         return;
 470 }
 471
 472
 473 /**
 474  * megaraid_probe_one - PCI hotplug entry point
 475  * @param pdev  : handle to this controller's PCI configuration space
 476  * @param id    : pci device id of the class of controllers
 477  *
 478  * This routine should be called whenever a new adapter is detected by the
 479  * PCI hotplug susbsytem.
 480  **/
 481 static int __devinit
 482 megaraid_probe_one(struct pci_dev *pdev, const struct pci_device_id *id)
 483 {
 484         adapter_t       *adapter;
 485
 486
 487         // detected a new controller
 488         con_log(CL_ANN, (KERN_INFO
 489                 "megaraid: probe new device %#4.04x:%#4.04x:%#4.04x:%#4.04x: ",
 490                 pdev->vendor, pdev->device, pdev->subsystem_vendor,
 491                 pdev->subsystem_device));
 492
 493         con_log(CL_ANN, ("bus %d:slot %d:func %d\n", pdev->bus->number,
 494                 PCI_SLOT(pdev->devfn), PCI_FUNC(pdev->devfn)));
 495
 496         if (pci_enable_device(pdev)) {
 497                 con_log(CL_ANN, (KERN_WARNING
 498                                 "megaraid: pci_enable_device failed\n"));
 499
 500                 return -ENODEV;
 501         }
 502
 503         // Enable bus-mastering on this controller
 504         pci_set_master(pdev);
 505
 506         // Allocate the per driver initialization structure
 507         adapter = kmalloc(sizeof(adapter_t), GFP_KERNEL);
 508
 509         if (adapter == NULL) {
 510                 con_log(CL_ANN, (KERN_WARNING
 511                 "megaraid: out of memory, %s %d.\n", __FUNCTION__, __LINE__));
 512
 513                 goto out_probe_one;
 514         }
 515         memset(adapter, 0, sizeof(adapter_t));
 516
 517
 518         // set up PCI related soft state and other pre-known parameters
 519         adapter->unique_id      = pdev->bus->number << 8 | pdev->devfn;
 520         adapter->irq            = pdev->irq;
 521         adapter->pdev           = pdev;
 522
 523         atomic_set(&adapter->being_detached, 0);
 524
 525         // Setup the default DMA mask. This would be changed later on
 526         // depending on hardware capabilities
 527         if (pci_set_dma_mask(adapter->pdev, DMA_32BIT_MASK) != 0) {
 528
 529                 con_log(CL_ANN, (KERN_WARNING
 530                         "megaraid: pci_set_dma_mask failed:%d\n", __LINE__));
 531
 532                 goto out_free_adapter;
 533         }
 534
 535
 536         // Initialize the synchronization lock for kernel and LLD
 537         spin_lock_init(&adapter->lock);
 538         adapter->host_lock = &adapter->lock;
 539
 540
 541         // Initialize the command queues: the list of free SCBs and the list
 542         // of pending SCBs.
 543         INIT_LIST_HEAD(&adapter->kscb_pool);
 544         spin_lock_init(SCSI_FREE_LIST_LOCK(adapter));
 545
 546         INIT_LIST_HEAD(&adapter->pend_list);
 547         spin_lock_init(PENDING_LIST_LOCK(adapter));
 548
 549         INIT_LIST_HEAD(&adapter->completed_list);
 550         spin_lock_init(COMPLETED_LIST_LOCK(adapter));
 551
 552
 553         // Start the mailbox based controller
 554         if (megaraid_init_mbox(adapter) != 0) {
 555                 con_log(CL_ANN, (KERN_WARNING
 556                         "megaraid: maibox adapter did not initialize\n"));
 557
 558                 goto out_free_adapter;
 559         }
 560
 561         // Register with LSI Common Management Module
 562         if (megaraid_cmm_register(adapter) != 0) {
 563
 564                 con_log(CL_ANN, (KERN_WARNING
 565                 "megaraid: could not register with management module\n"));
 566
 567                 goto out_fini_mbox;
 568         }
 569
 570         // setup adapter handle in PCI soft state
 571         pci_set_drvdata(pdev, adapter);
 572
 573         // attach with scsi mid-layer
 574         if (megaraid_io_attach(adapter) != 0) {
 575
 576                 con_log(CL_ANN, (KERN_WARNING "megaraid: io attach failed\n"));
 577
 578                 goto out_cmm_unreg;
 579         }
 580
 581         return 0;
 582
 583 out_cmm_unreg:
 584         pci_set_drvdata(pdev, NULL);
 585         megaraid_cmm_unregister(adapter);
 586 out_fini_mbox:
 587         megaraid_fini_mbox(adapter);
 588 out_free_adapter:
 589         kfree(adapter);
 590 out_probe_one:
 591         pci_disable_device(pdev);
 592
 593         return -ENODEV;
 594 }
 595
 596
 597 /**
 598  * megaraid_detach_one - release the framework resources and call LLD release
 599  * routine
 600  * @param pdev  : handle for our PCI cofiguration space
 601  *
 602  * This routine is called during driver unload. We free all the allocated
 603  * resources and call the corresponding LLD so that it can also release all
 604  * its resources.
 605  *
 606  * This routine is also called from the PCI hotplug system
 607  **/
 608 static void
 609 megaraid_detach_one(struct pci_dev *pdev)
 610 {
 611         adapter_t               *adapter;
 612         struct Scsi_Host        *host;
 613
 614
 615         // Start a rollback on this adapter
 616         adapter = pci_get_drvdata(pdev);
 617
 618         if (!adapter) {
 619                 con_log(CL_ANN, (KERN_CRIT
 620                 "megaraid: Invalid detach on %#4.04x:%#4.04x:%#4.04x:%#4.04x\n",
 621                         pdev->vendor, pdev->device, pdev->subsystem_vendor,
 622                         pdev->subsystem_device));
 623
 624                 return;
 625         }
 626         else {
 627                 con_log(CL_ANN, (KERN_NOTICE
 628                 "megaraid: detaching device %#4.04x:%#4.04x:%#4.04x:%#4.04x\n",
 629                         pdev->vendor, pdev->device, pdev->subsystem_vendor,
 630                         pdev->subsystem_device));
 631         }
 632
 633
 634         host = adapter->host;
 635
 636         // do not allow any more requests from the management module for this
 637         // adapter.
 638         // FIXME: How do we account for the request which might still be
 639         // pending with us?
 640         atomic_set(&adapter->being_detached, 1);
 641
 642         // detach from the IO sub-system
 643         megaraid_io_detach(adapter);
 644
 645         // reset the device state in the PCI structure. We check this
 646         // condition when we enter here. If the device state is NULL,
 647         // that would mean the device has already been removed
 648         pci_set_drvdata(pdev, NULL);
 649
 650         // Unregister from common management module
 651         //
 652         // FIXME: this must return success or failure for conditions if there
 653         // is a command pending with LLD or not.
 654         megaraid_cmm_unregister(adapter);
 655
 656         // finalize the mailbox based controller and release all resources
 657         megaraid_fini_mbox(adapter);
 658
 659         kfree(adapter);
 660
 661         scsi_host_put(host);
 662
 663         pci_disable_device(pdev);
 664
 665         return;
 666 }
 667
 668
 669 /**
 670  * megaraid_mbox_shutdown - PCI shutdown for megaraid HBA
 671  * @param device        : generice driver model device
 672  *
 673  * Shutdown notification, perform flush cache
 674  */
 675 static void
 676 megaraid_mbox_shutdown(struct device *device)
 677 {
 678         adapter_t               *adapter = pci_get_drvdata(to_pci_dev(device));
 679         static int              counter;
 680
 681         if (!adapter) {
 682                 con_log(CL_ANN, (KERN_WARNING
 683                         "megaraid: null device in shutdown\n"));
 684                 return;
 685         }
 686
 687         // flush caches now
 688         con_log(CL_ANN, (KERN_INFO "megaraid: flushing adapter %d...",
 689                 counter++));
 690
 691         megaraid_mbox_flush_cache(adapter);
 692
 693         con_log(CL_ANN, ("done\n"));
 694 }
 695
 696
 697 /**
 698  * megaraid_io_attach - attach a device with the IO subsystem
 699  * @param adapter       : controller's soft state
 700  *
 701  * Attach this device with the IO subsystem
 702  **/
 703 static int
 704 megaraid_io_attach(adapter_t *adapter)
 705 {
 706         struct Scsi_Host        *host;
 707
 708         // Initialize SCSI Host structure
 709         host = scsi_host_alloc(&megaraid_template_g, 8);
 710         if (!host) {
 711                 con_log(CL_ANN, (KERN_WARNING
 712                         "megaraid mbox: scsi_register failed\n"));
 713
 714                 return -1;
 715         }
 716
 717         SCSIHOST2ADAP(host)     = (caddr_t)adapter;
 718         adapter->host           = host;
 719
 720         // export the parameters required by the mid-layer
 721         scsi_assign_lock(host, adapter->host_lock);
 722         scsi_set_device(host, &adapter->pdev->dev);
 723
 724         host->irq               = adapter->irq;
 725         host->unique_id         = adapter->unique_id;
 726         host->can_queue         = adapter->max_cmds;
 727         host->this_id           = adapter->init_id;
 728         host->sg_tablesize      = adapter->sglen;
 729         host->max_sectors       = adapter->max_sectors;
 730         host->cmd_per_lun       = adapter->cmd_per_lun;
 731         host->max_channel       = adapter->max_channel;
 732         host->max_id            = adapter->max_target;
 733         host->max_lun           = adapter->max_lun;
 734
 735
 736         // notify mid-layer about the new controller
 737         if (scsi_add_host(host, &adapter->pdev->dev)) {
 738
 739                 con_log(CL_ANN, (KERN_WARNING
 740                         "megaraid mbox: scsi_add_host failed\n"));
 741
 742                 scsi_host_put(host);
 743
 744                 return -1;
 745         }
 746
 747         scsi_scan_host(host);
 748
 749         return 0;
 750 }
 751
 752
 753 /**
 754  * megaraid_io_detach - detach a device from the IO subsystem
 755  * @param adapter       : controller's soft state
 756  *
 757  * Detach this device from the IO subsystem
 758  **/
 759 static void
 760 megaraid_io_detach(adapter_t *adapter)
 761 {
 762         struct Scsi_Host        *host;
 763
 764         con_log(CL_DLEVEL1, (KERN_INFO "megaraid: io detach\n"));
 765
 766         host = adapter->host;
 767
 768         scsi_remove_host(host);
 769
 770         return;
 771 }
 772
 773
 774 /*
 775  * START: Mailbox Low Level Driver
 776  *
 777  * This is section specific to the single mailbox based controllers
 778  */
 779
 780 /**
 781  * megaraid_init_mbox - initialize controller
 782  * @param adapter       - our soft state
 783  *
 784  * . Allocate 16-byte aligned mailbox memory for firmware handshake
 785  * . Allocate controller's memory resources
 786  * . Find out all initialization data
 787  * . Allocate memory required for all the commands
 788  * . Use internal library of FW routines, build up complete soft state
 789  */
 790 static int __init
 791 megaraid_init_mbox(adapter_t *adapter)
 792 {
 793         struct pci_dev          *pdev;
 794         mraid_device_t          *raid_dev;
 795         int                     i;
 796
 797
 798         adapter->ito    = MBOX_TIMEOUT;
 799         pdev            = adapter->pdev;
 800
 801         /*
 802          * Allocate and initialize the init data structure for mailbox
 803          * controllers
 804          */
 805         raid_dev = kmalloc(sizeof(mraid_device_t), GFP_KERNEL);
 806         if (raid_dev == NULL) return -1;
 807
 808         memset(raid_dev, 0, sizeof(mraid_device_t));
 809
 810         /*
 811          * Attach the adapter soft state to raid device soft state
 812          */
 813         adapter->raid_device    = (caddr_t)raid_dev;
 814         raid_dev->fast_load     = megaraid_fast_load;
 815
 816
 817         // our baseport
 818         raid_dev->baseport = pci_resource_start(pdev, 0);
 819
 820         if (pci_request_regions(pdev, "MegaRAID: LSI Logic Corporation") != 0) {
 821
 822                 con_log(CL_ANN, (KERN_WARNING
 823                                 "megaraid: mem region busy\n"));
 824
 825                 goto out_free_raid_dev;
 826         }
 827
 828         raid_dev->baseaddr = ioremap_nocache(raid_dev->baseport, 128);
 829
 830         if (!raid_dev->baseaddr) {
 831
 832                 con_log(CL_ANN, (KERN_WARNING
 833                         "megaraid: could not map hba memory\n") );
 834
 835                 goto out_release_regions;
 836         }
 837
 838         //
 839         // Setup the rest of the soft state using the library of FW routines
 840         //
 841
 842         // request IRQ and register the interrupt service routine
 843         if (request_irq(adapter->irq, megaraid_isr, SA_SHIRQ, "megaraid",
 844                 adapter)) {
 845
 846                 con_log(CL_ANN, (KERN_WARNING
 847                         "megaraid: Couldn't register IRQ %d!\n", adapter->irq));
 848
 849                 goto out_iounmap;
 850         }
 851
 852
 853         // initialize the mutual exclusion lock for the mailbox
 854         spin_lock_init(&raid_dev->mailbox_lock);
 855
 856         // allocate memory required for commands
 857         if (megaraid_alloc_cmd_packets(adapter) != 0) {
 858                 goto out_free_irq;
 859         }
 860
 861         // Product info
 862         if (megaraid_mbox_product_info(adapter) != 0) {
 863                 goto out_alloc_cmds;
 864         }
 865
 866         // Do we support extended CDBs
 867         adapter->max_cdb_sz = 10;
 868         if (megaraid_mbox_extended_cdb(adapter) == 0) {
 869                 adapter->max_cdb_sz = 16;
 870         }
 871
 872         /*
 873          * Do we support cluster environment, if we do, what is the initiator
 874          * id.
 875          * NOTE: In a non-cluster aware firmware environment, the LLD should
 876          * return 7 as initiator id.
 877          */
 878         adapter->ha             = 0;
 879         adapter->init_id        = -1;
 880         if (megaraid_mbox_support_ha(adapter, &adapter->init_id) == 0) {
 881                 adapter->ha = 1;
 882         }
 883
 884         /*
 885          * Prepare the device ids array to have the mapping between the kernel
 886          * device address and megaraid device address.
 887          * We export the physical devices on their actual addresses. The
 888          * logical drives are exported on a virtual SCSI channel
 889          */
 890         megaraid_mbox_setup_device_map(adapter);
 891
 892         // If the firmware supports random deletion, update the device id map
 893         if (megaraid_mbox_support_random_del(adapter)) {
 894
 895                 // Change the logical drives numbers in device_ids array one
 896                 // slot in device_ids is reserved for target id, that's why
 897                 // "<=" below
 898                 for (i = 0; i <= MAX_LOGICAL_DRIVES_40LD; i++) {
 899                         adapter->device_ids[adapter->max_channel][i] += 0x80;
 900                 }
 901                 adapter->device_ids[adapter->max_channel][adapter->init_id] =
 902                         0xFF;
 903
 904                 raid_dev->random_del_supported = 1;
 905         }
 906
 907         /*
 908          * find out the maximum number of scatter-gather elements supported by
 909          * this firmware
 910          */
 911         adapter->sglen = megaraid_mbox_get_max_sg(adapter);
 912
 913         // enumerate RAID and SCSI channels so that all devices on SCSI
 914         // channels can later be exported, including disk devices
 915         megaraid_mbox_enum_raid_scsi(adapter);
 916
 917         /*
 918          * Other parameters required by upper layer
 919          *
 920          * maximum number of sectors per IO command
 921          */
 922         adapter->max_sectors = megaraid_max_sectors;
 923
 924         /*
 925          * number of queued commands per LUN.
 926          */
 927         adapter->cmd_per_lun = megaraid_cmd_per_lun;
 928
 929         /*
 930          * Allocate resources required to issue FW calls, when sysfs is
 931          * accessed
 932          */
 933         if (megaraid_sysfs_alloc_resources(adapter) != 0) {
 934                 goto out_alloc_cmds;
 935         }
 936
 937         // Set the DMA mask to 64-bit. All supported controllers as capable of
 938         // DMA in this range
 939         if (pci_set_dma_mask(adapter->pdev, DMA_64BIT_MASK) != 0) {
 940
 941                 con_log(CL_ANN, (KERN_WARNING
 942                         "megaraid: could not set DMA mask for 64-bit.\n"));
 943
 944                 goto out_free_sysfs_res;
 945         }
 946
 947         // setup tasklet for DPC
 948         tasklet_init(&adapter->dpc_h, megaraid_mbox_dpc,
 949                         (unsigned long)adapter);
 950
 951         con_log(CL_DLEVEL1, (KERN_INFO
 952                 "megaraid mbox hba successfully initialized\n"));
 953
 954         return 0;
 955
 956 out_free_sysfs_res:
 957         megaraid_sysfs_free_resources(adapter);
 958 out_alloc_cmds:
 959         megaraid_free_cmd_packets(adapter);
 960 out_free_irq:
 961         free_irq(adapter->irq, adapter);
 962 out_iounmap:
 963         iounmap(raid_dev->baseaddr);
 964 out_release_regions:
 965         pci_release_regions(pdev);
 966 out_free_raid_dev:
 967         kfree(raid_dev);
 968
 969         return -1;
 970 }
 971
 972
 973 /**
 974  * megaraid_fini_mbox - undo controller initialization
 975  * @param adapter       : our soft state
 976  */
 977 static void
 978 megaraid_fini_mbox(adapter_t *adapter)
 979 {
 980         mraid_device_t *raid_dev = ADAP2RAIDDEV(adapter);
 981
 982         // flush all caches
 983         megaraid_mbox_flush_cache(adapter);
 984
 985         tasklet_kill(&adapter->dpc_h);
 986
 987         megaraid_sysfs_free_resources(adapter);
 988
 989         megaraid_free_cmd_packets(adapter);
 990
 991         free_irq(adapter->irq, adapter);
 992
 993         iounmap(raid_dev->baseaddr);
 994
 995         pci_release_regions(adapter->pdev);
 996
 997         kfree(raid_dev);
 998
 999         return;
1000 }
1001
1002
1003 /**
1004  * megaraid_alloc_cmd_packets - allocate shared mailbox
1005  * @param adapter       : soft state of the raid controller
1006  *
1007  * Allocate and align the shared mailbox. This maibox is used to issue
1008  * all the commands. For IO based controllers, the mailbox is also regsitered
1009  * with the FW. Allocate memory for all commands as well.
1010  * This is our big allocator
1011  */
1012 static int
1013 megaraid_alloc_cmd_packets(adapter_t *adapter)
1014 {
1015         mraid_device_t          *raid_dev = ADAP2RAIDDEV(adapter);
1016         struct pci_dev          *pdev;
1017         unsigned long           align;
1018         scb_t                   *scb;
1019         mbox_ccb_t              *ccb;
1020         struct mraid_pci_blk    *epthru_pci_blk;
1021         struct mraid_pci_blk    *sg_pci_blk;
1022         struct mraid_pci_blk    *mbox_pci_blk;
1023         int                     i;
1024
1025         pdev = adapter->pdev;
1026
1027         /*
1028          * Setup the mailbox
1029          * Allocate the common 16-byte aligned memory for the handshake
1030          * mailbox.
1031          */
1032         raid_dev->una_mbox64 = pci_alloc_consistent(adapter->pdev,
1033                         sizeof(mbox64_t), &raid_dev->una_mbox64_dma);
1034
1035         if (!raid_dev->una_mbox64) {
1036                 con_log(CL_ANN, (KERN_WARNING
1037                         "megaraid: out of memory, %s %d\n", __FUNCTION__,
1038                         __LINE__));
1039                 return -1;
1040         }
1041         memset(raid_dev->una_mbox64, 0, sizeof(mbox64_t));
1042
1043         /*
1044          * Align the mailbox at 16-byte boundary
1045          */
1046         raid_dev->mbox  = &raid_dev->una_mbox64->mbox32;
1047
1048         raid_dev->mbox  = (mbox_t *)((((unsigned long)raid_dev->mbox) + 15) &
1049                                 (~0UL ^ 0xFUL));
1050
1051         raid_dev->mbox64 = (mbox64_t *)(((unsigned long)raid_dev->mbox) - 8);
1052
1053         align = ((void *)raid_dev->mbox -
1054                         ((void *)&raid_dev->una_mbox64->mbox32));
1055
1056         raid_dev->mbox_dma = (unsigned long)raid_dev->una_mbox64_dma + 8 +
1057                         align;
1058
1059         // Allocate memory for commands issued internally
1060         adapter->ibuf = pci_alloc_consistent(pdev, MBOX_IBUF_SIZE,
1061                                 &adapter->ibuf_dma_h);
1062         if (!adapter->ibuf) {
1063
1064                 con_log(CL_ANN, (KERN_WARNING
1065                         "megaraid: out of memory, %s %d\n", __FUNCTION__,
1066                         __LINE__));
1067
1068                 goto out_free_common_mbox;
1069         }
1070         memset(adapter->ibuf, 0, MBOX_IBUF_SIZE);
1071
1072         // Allocate memory for our SCSI Command Blocks and their associated
1073         // memory
1074
1075         /*
1076          * Allocate memory for the base list of scb. Later allocate memory for
1077          * CCBs and embedded components of each CCB and point the pointers in
1078          * scb to the allocated components
1079          * NOTE: The code to allocate SCB will be duplicated in all the LLD
1080          * since the calling routine does not yet know the number of available
1081          * commands.
1082          */
1083         adapter->kscb_list = kmalloc(sizeof(scb_t) * MBOX_MAX_SCSI_CMDS,
1084                         GFP_KERNEL);
1085
1086         if (adapter->kscb_list == NULL) {
1087                 con_log(CL_ANN, (KERN_WARNING
1088                         "megaraid: out of memory, %s %d\n", __FUNCTION__,
1089                         __LINE__));
1090                 goto out_free_ibuf;
1091         }
1092         memset(adapter->kscb_list, 0, sizeof(scb_t) * MBOX_MAX_SCSI_CMDS);
1093
1094         // memory allocation for our command packets
1095         if (megaraid_mbox_setup_dma_pools(adapter) != 0) {
1096                 con_log(CL_ANN, (KERN_WARNING
1097                         "megaraid: out of memory, %s %d\n", __FUNCTION__,
1098                         __LINE__));
1099                 goto out_free_scb_list;
1100         }
1101
1102         // Adjust the scb pointers and link in the free pool
1103         epthru_pci_blk  = raid_dev->epthru_pool;
1104         sg_pci_blk      = raid_dev->sg_pool;
1105         mbox_pci_blk    = raid_dev->mbox_pool;
1106
1107         for (i = 0; i < MBOX_MAX_SCSI_CMDS; i++) {
1108                 scb                     = adapter->kscb_list + i;
1109                 ccb                     = raid_dev->ccb_list + i;
1110
1111                 ccb->mbox       = (mbox_t *)(mbox_pci_blk[i].vaddr + 16);
1112                 ccb->raw_mbox   = (uint8_t *)ccb->mbox;
1113                 ccb->mbox64     = (mbox64_t *)(mbox_pci_blk[i].vaddr + 8);
1114                 ccb->mbox_dma_h = (unsigned long)mbox_pci_blk[i].dma_addr + 16;
1115
1116                 // make sure the mailbox is aligned properly
1117                 if (ccb->mbox_dma_h & 0x0F) {
1118                         con_log(CL_ANN, (KERN_CRIT
1119                                 "megaraid mbox: not aligned on 16-bytes\n"));
1120
1121                         goto out_teardown_dma_pools;
1122                 }
1123
1124                 ccb->epthru             = (mraid_epassthru_t *)
1125                                                 epthru_pci_blk[i].vaddr;
1126                 ccb->epthru_dma_h       = epthru_pci_blk[i].dma_addr;
1127                 ccb->pthru              = (mraid_passthru_t *)ccb->epthru;
1128                 ccb->pthru_dma_h        = ccb->epthru_dma_h;
1129
1130
1131                 ccb->sgl64              = (mbox_sgl64 *)sg_pci_blk[i].vaddr;
1132                 ccb->sgl_dma_h          = sg_pci_blk[i].dma_addr;
1133                 ccb->sgl32              = (mbox_sgl32 *)ccb->sgl64;
1134
1135                 scb->ccb                = (caddr_t)ccb;
1136                 scb->gp                 = 0;
1137
1138                 scb->sno                = i;    // command index
1139
1140                 scb->scp                = NULL;
1141                 scb->state              = SCB_FREE;
1142                 scb->dma_direction      = PCI_DMA_NONE;
1143                 scb->dma_type           = MRAID_DMA_NONE;
1144                 scb->dev_channel        = -1;
1145                 scb->dev_target         = -1;
1146
1147                 // put scb in the free pool
1148                 list_add_tail(&scb->list, &adapter->kscb_pool);
1149         }
1150
1151         return 0;
1152
1153 out_teardown_dma_pools:
1154         megaraid_mbox_teardown_dma_pools(adapter);
1155 out_free_scb_list:
1156         kfree(adapter->kscb_list);
1157 out_free_ibuf:
1158         pci_free_consistent(pdev, MBOX_IBUF_SIZE, (void *)adapter->ibuf,
1159                 adapter->ibuf_dma_h);
1160 out_free_common_mbox:
1161         pci_free_consistent(adapter->pdev, sizeof(mbox64_t),
1162                 (caddr_t)raid_dev->una_mbox64, raid_dev->una_mbox64_dma);
1163
1164         return -1;
1165 }
1166
1167
1168 /**
1169  * megaraid_free_cmd_packets - free memory
1170  * @param adapter       : soft state of the raid controller
1171  *
1172  * Release memory resources allocated for commands
1173  */
1174 static void
1175 megaraid_free_cmd_packets(adapter_t *adapter)
1176 {
1177         mraid_device_t *raid_dev = ADAP2RAIDDEV(adapter);
1178
1179         megaraid_mbox_teardown_dma_pools(adapter);
1180
1181         kfree(adapter->kscb_list);
1182
1183         pci_free_consistent(adapter->pdev, MBOX_IBUF_SIZE,
1184                 (void *)adapter->ibuf, adapter->ibuf_dma_h);
1185
1186         pci_free_consistent(adapter->pdev, sizeof(mbox64_t),
1187                 (caddr_t)raid_dev->una_mbox64, raid_dev->una_mbox64_dma);
1188         return;
1189 }
1190
1191
1192 /**
1193  * megaraid_mbox_setup_dma_pools - setup dma pool for command packets
1194  * @param adapter       : HBA soft state
1195  *
1196  * setup the dma pools for mailbox, passthru and extended passthru structures,
1197  * and scatter-gather lists
1198  */
1199 static int
1200 megaraid_mbox_setup_dma_pools(adapter_t *adapter)
1201 {
1202         mraid_device_t          *raid_dev = ADAP2RAIDDEV(adapter);
1203         struct mraid_pci_blk    *epthru_pci_blk;
1204         struct mraid_pci_blk    *sg_pci_blk;
1205         struct mraid_pci_blk    *mbox_pci_blk;
1206         int                     i;
1207
1208
1209
1210         // Allocate memory for 16-bytes aligned mailboxes
1211         raid_dev->mbox_pool_handle = pci_pool_create("megaraid mbox pool",
1212                                                 adapter->pdev,
1213                                                 sizeof(mbox64_t) + 16,
1214                                                 16, 0);
1215
1216         if (raid_dev->mbox_pool_handle == NULL) {
1217                 goto fail_setup_dma_pool;
1218         }
1219
1220         mbox_pci_blk = raid_dev->mbox_pool;
1221         for (i = 0; i < MBOX_MAX_SCSI_CMDS; i++) {
1222                 mbox_pci_blk[i].vaddr = pci_pool_alloc(
1223                                                 raid_dev->mbox_pool_handle,
1224                                                 GFP_KERNEL,
1225                                                 &mbox_pci_blk[i].dma_addr);
1226                 if (!mbox_pci_blk[i].vaddr) {
1227                         goto fail_setup_dma_pool;
1228                 }
1229         }
1230
1231         /*
1232          * Allocate memory for each embedded passthru strucuture pointer
1233          * Request for a 128 bytes aligned structure for each passthru command
1234          * structure
1235          * Since passthru and extended passthru commands are exclusive, they
1236          * share common memory pool. Passthru structures piggyback on memory
1237          * allocted to extended passthru since passthru is smaller of the two
1238          */
1239         raid_dev->epthru_pool_handle = pci_pool_create("megaraid mbox pthru",
1240                         adapter->pdev, sizeof(mraid_epassthru_t), 128, 0);
1241
1242         if (raid_dev->epthru_pool_handle == NULL) {
1243                 goto fail_setup_dma_pool;
1244         }
1245
1246         epthru_pci_blk = raid_dev->epthru_pool;
1247         for (i = 0; i < MBOX_MAX_SCSI_CMDS; i++) {
1248                 epthru_pci_blk[i].vaddr = pci_pool_alloc(
1249                                                 raid_dev->epthru_pool_handle,
1250                                                 GFP_KERNEL,
1251                                                 &epthru_pci_blk[i].dma_addr);
1252                 if (!epthru_pci_blk[i].vaddr) {
1253                         goto fail_setup_dma_pool;
1254                 }
1255         }
1256
1257
1258         // Allocate memory for each scatter-gather list. Request for 512 bytes
1259         // alignment for each sg list
1260         raid_dev->sg_pool_handle = pci_pool_create("megaraid mbox sg",
1261                                         adapter->pdev,
1262                                         sizeof(mbox_sgl64) * MBOX_MAX_SG_SIZE,
1263                                         512, 0);
1264
1265         if (raid_dev->sg_pool_handle == NULL) {
1266                 goto fail_setup_dma_pool;
1267         }
1268
1269         sg_pci_blk = raid_dev->sg_pool;
1270         for (i = 0; i < MBOX_MAX_SCSI_CMDS; i++) {
1271                 sg_pci_blk[i].vaddr = pci_pool_alloc(
1272                                                 raid_dev->sg_pool_handle,
1273                                                 GFP_KERNEL,
1274                                                 &sg_pci_blk[i].dma_addr);
1275                 if (!sg_pci_blk[i].vaddr) {
1276                         goto fail_setup_dma_pool;
1277                 }
1278         }
1279
1280         return 0;
1281
1282 fail_setup_dma_pool:
1283         megaraid_mbox_teardown_dma_pools(adapter);
1284         return -1;
1285 }
1286
1287
1288 /**
1289  * megaraid_mbox_teardown_dma_pools - teardown dma pools for command packets
1290  * @param adapter       : HBA soft state
1291  *
1292  * teardown the dma pool for mailbox, passthru and extended passthru
1293  * structures, and scatter-gather lists
1294  */
1295 static void
1296 megaraid_mbox_teardown_dma_pools(adapter_t *adapter)
1297 {
1298         mraid_device_t          *raid_dev = ADAP2RAIDDEV(adapter);
1299         struct mraid_pci_blk    *epthru_pci_blk;
1300         struct mraid_pci_blk    *sg_pci_blk;
1301         struct mraid_pci_blk    *mbox_pci_blk;
1302         int                     i;
1303
1304
1305         sg_pci_blk = raid_dev->sg_pool;
1306         for (i = 0; i < MBOX_MAX_SCSI_CMDS && sg_pci_blk[i].vaddr; i++) {
1307                 pci_pool_free(raid_dev->sg_pool_handle, sg_pci_blk[i].vaddr,
1308                         sg_pci_blk[i].dma_addr);
1309         }
1310         if (raid_dev->sg_pool_handle)
1311                 pci_pool_destroy(raid_dev->sg_pool_handle);
1312
1313
1314         epthru_pci_blk = raid_dev->epthru_pool;
1315         for (i = 0; i < MBOX_MAX_SCSI_CMDS && epthru_pci_blk[i].vaddr; i++) {
1316                 pci_pool_free(raid_dev->epthru_pool_handle,
1317                         epthru_pci_blk[i].vaddr, epthru_pci_blk[i].dma_addr);
1318         }
1319         if (raid_dev->epthru_pool_handle)
1320                 pci_pool_destroy(raid_dev->epthru_pool_handle);
1321
1322
1323         mbox_pci_blk = raid_dev->mbox_pool;
1324         for (i = 0; i < MBOX_MAX_SCSI_CMDS && mbox_pci_blk[i].vaddr; i++) {
1325                 pci_pool_free(raid_dev->mbox_pool_handle,
1326                         mbox_pci_blk[i].vaddr, mbox_pci_blk[i].dma_addr);
1327         }
1328         if (raid_dev->mbox_pool_handle)
1329                 pci_pool_destroy(raid_dev->mbox_pool_handle);
1330
1331         return;
1332 }
1333
1334
1335 /**
1336  * megaraid_alloc_scb - detach and return a scb from the free list
1337  * @adapter     : controller's soft state
1338  *
1339  * return the scb from the head of the free list. NULL if there are none
1340  * available
1341  **/
1342 static inline scb_t *
1343 megaraid_alloc_scb(adapter_t *adapter, struct scsi_cmnd *scp)
1344 {
1345         struct list_head        *head = &adapter->kscb_pool;
1346         scb_t                   *scb = NULL;
1347         unsigned long           flags;
1348
1349         // detach scb from free pool
1350         spin_lock_irqsave(SCSI_FREE_LIST_LOCK(adapter), flags);
1351
1352         if (list_empty(head)) {
1353                 spin_unlock_irqrestore(SCSI_FREE_LIST_LOCK(adapter), flags);
1354                 return NULL;
1355         }
1356
1357         scb = list_entry(head->next, scb_t, list);
1358         list_del_init(&scb->list);
1359
1360         spin_unlock_irqrestore(SCSI_FREE_LIST_LOCK(adapter), flags);
1361
1362         scb->state      = SCB_ACTIVE;
1363         scb->scp        = scp;
1364         scb->dma_type   = MRAID_DMA_NONE;
1365
1366         return scb;
1367 }
1368
1369
1370 /**
1371  * megaraid_dealloc_scb - return the scb to the free pool
1372  * @adapter     : controller's soft state
1373  * @scb         : scb to be freed
1374  *
1375  * return the scb back to the free list of scbs. The caller must 'flush' the
1376  * SCB before calling us. E.g., performing pci_unamp and/or pci_sync etc.
1377  * NOTE NOTE: Make sure the scb is not on any list before calling this
1378  * routine.
1379  **/
1380 static inline void
1381 megaraid_dealloc_scb(adapter_t *adapter, scb_t *scb)
1382 {
1383         unsigned long           flags;
1384
1385         // put scb in the free pool
1386         scb->state      = SCB_FREE;
1387         scb->scp        = NULL;
1388         spin_lock_irqsave(SCSI_FREE_LIST_LOCK(adapter), flags);
1389
1390         list_add(&scb->list, &adapter->kscb_pool);
1391
1392         spin_unlock_irqrestore(SCSI_FREE_LIST_LOCK(adapter), flags);
1393
1394         return;
1395 }
1396
1397
1398 /**
1399  * megaraid_mbox_mksgl - make the scatter-gather list
1400  * @adapter     - controller's soft state
1401  * @scb         - scsi control block
1402  *
1403  * prepare the scatter-gather list
1404  */
1405 static inline int
1406 megaraid_mbox_mksgl(adapter_t *adapter, scb_t *scb)
1407 {
1408         struct scatterlist      *sgl;
1409         mbox_ccb_t              *ccb;
1410         struct page             *page;
1411         unsigned long           offset;
1412         struct scsi_cmnd        *scp;
1413         int                     sgcnt;
1414         int                     i;
1415
1416
1417         scp     = scb->scp;
1418         ccb     = (mbox_ccb_t *)scb->ccb;
1419
1420         // no mapping required if no data to be transferred
1421         if (!scp->request_buffer || !scp->request_bufflen)
1422                 return 0;
1423
1424         if (!scp->use_sg) {     /* scatter-gather list not used */
1425
1426                 page = virt_to_page(scp->request_buffer);
1427
1428                 offset = ((unsigned long)scp->request_buffer & ~PAGE_MASK);
1429
1430                 ccb->buf_dma_h = pci_map_page(adapter->pdev, page, offset,
1431                                                   scp->request_bufflen,
1432                                                   scb->dma_direction);
1433                 scb->dma_type = MRAID_DMA_WBUF;
1434
1435                 /*
1436                  * We need to handle special 64-bit commands that need a
1437                  * minimum of 1 SG
1438                  */
1439                 sgcnt = 1;
1440                 ccb->sgl64[0].address   = ccb->buf_dma_h;
1441                 ccb->sgl64[0].length    = scp->request_bufflen;
1442
1443                 return sgcnt;
1444         }
1445
1446         sgl = (struct scatterlist *)scp->request_buffer;
1447
1448         // The number of sg elements returned must not exceed our limit
1449         sgcnt = pci_map_sg(adapter->pdev, sgl, scp->use_sg,
1450                         scb->dma_direction);
1451
1452         if (sgcnt > adapter->sglen) {
1453                 con_log(CL_ANN, (KERN_CRIT
1454                         "megaraid critical: too many sg elements:%d\n",
1455                         sgcnt));
1456                 BUG();
1457         }
1458
1459         scb->dma_type = MRAID_DMA_WSG;
1460
1461         for (i = 0; i < sgcnt; i++, sgl++) {
1462                 ccb->sgl64[i].address   = sg_dma_address(sgl);
1463                 ccb->sgl64[i].length    = sg_dma_len(sgl);
1464         }
1465
1466         // Return count of SG nodes
1467         return sgcnt;
1468 }
1469
1470
1471 /**
1472  * mbox_post_cmd - issue a mailbox command
1473  * @adapter     - controller's soft state
1474  * @scb         - command to be issued
1475  *
1476  * post the command to the controller if mailbox is availble.
1477  */
1478 static inline int
1479 mbox_post_cmd(adapter_t *adapter, scb_t *scb)
1480 {
1481         mraid_device_t  *raid_dev = ADAP2RAIDDEV(adapter);
1482         mbox64_t        *mbox64;
1483         mbox_t          *mbox;
1484         mbox_ccb_t      *ccb;
1485         unsigned long   flags;
1486         unsigned int    i = 0;
1487
1488
1489         ccb     = (mbox_ccb_t *)scb->ccb;
1490         mbox    = raid_dev->mbox;
1491         mbox64  = raid_dev->mbox64;
1492
1493         /*
1494          * Check for busy mailbox. If it is, return failure - the caller
1495          * should retry later.
1496          */
1497         spin_lock_irqsave(MAILBOX_LOCK(raid_dev), flags);
1498
1499         if (unlikely(mbox->busy)) {
1500                 do {
1501                         udelay(1);
1502                         i++;
1503                         rmb();
1504                 } while(mbox->busy && (i < max_mbox_busy_wait));
1505
1506                 if (mbox->busy) {
1507
1508                         spin_unlock_irqrestore(MAILBOX_LOCK(raid_dev), flags);
1509
1510                         return -1;
1511                 }
1512         }
1513
1514
1515         // Copy this command's mailbox data into "adapter's" mailbox
1516         memcpy((caddr_t)mbox64, (caddr_t)ccb->mbox64, 22);
1517         mbox->cmdid = scb->sno;
1518
1519         adapter->outstanding_cmds++;
1520
1521         if (scb->dma_direction == PCI_DMA_TODEVICE) {
1522                 if (!scb->scp->use_sg) {        // sg list not used
1523                         pci_dma_sync_single_for_device(adapter->pdev,
1524                                         ccb->buf_dma_h,
1525                                         scb->scp->request_bufflen,
1526                                         PCI_DMA_TODEVICE);
1527                 }
1528                 else {
1529                         pci_dma_sync_sg_for_device(adapter->pdev,
1530                                 scb->scp->request_buffer,
1531                                 scb->scp->use_sg, PCI_DMA_TODEVICE);
1532                 }
1533         }
1534
1535         mbox->busy      = 1;    // Set busy
1536         mbox->poll      = 0;
1537         mbox->ack       = 0;
1538         wmb();
1539
1540         WRINDOOR(raid_dev, raid_dev->mbox_dma | 0x1);
1541
1542         spin_unlock_irqrestore(MAILBOX_LOCK(raid_dev), flags);
1543
1544         return 0;
1545 }
1546
1547
1548 /**
1549  * megaraid_queue_command - generic queue entry point for all LLDs
1550  * @scp         : pointer to the scsi command to be executed
1551  * @done        : callback routine to be called after the cmd has be completed
1552  *
1553  * Queue entry point for mailbox based controllers.
1554  */
1555 static int
1556 megaraid_queue_command(struct scsi_cmnd *scp, void (* done)(struct scsi_cmnd *))
1557 {
1558         adapter_t       *adapter;
1559         scb_t           *scb;
1560         int             if_busy;
1561
1562         adapter         = SCP2ADAPTER(scp);
1563         scp->scsi_done  = done;
1564         scp->result     = 0;
1565
1566         assert_spin_locked(adapter->host_lock);
1567
1568         spin_unlock(adapter->host_lock);
1569
1570         /*
1571          * Allocate and build a SCB request
1572          * if_busy flag will be set if megaraid_mbox_build_cmd() command could
1573          * not allocate scb. We will return non-zero status in that case.
1574          * NOTE: scb can be null even though certain commands completed
1575          * successfully, e.g., MODE_SENSE and TEST_UNIT_READY, it would
1576          * return 0 in that case, and we would do the callback right away.
1577          */
1578         if_busy = 0;
1579         scb     = megaraid_mbox_build_cmd(adapter, scp, &if_busy);
1580
1581         if (scb) {
1582                 megaraid_mbox_runpendq(adapter, scb);
1583         }
1584
1585         spin_lock(adapter->host_lock);
1586
1587         if (!scb) {     // command already completed
1588                 done(scp);
1589                 return 0;
1590         }
1591
1592         return if_busy;
1593 }
1594
1595
1596 /**
1597  * megaraid_mbox_build_cmd - transform the mid-layer scsi command to megaraid
1598  * firmware lingua
1599  * @adapter     - controller's soft state
1600  * @scp         - mid-layer scsi command pointer
1601  * @busy        - set if request could not be completed because of lack of
1602  *              resources
1603  *
1604  * convert the command issued by mid-layer to format understood by megaraid
1605  * firmware. We also complete certain command without sending them to firmware
1606  */
1607 static scb_t *
1608 megaraid_mbox_build_cmd(adapter_t *adapter, struct scsi_cmnd *scp, int *busy)
1609 {
1610         mraid_device_t          *rdev = ADAP2RAIDDEV(adapter);
1611         int                     channel;
1612         int                     target;
1613         int                     islogical;
1614         mbox_ccb_t              *ccb;
1615         mraid_passthru_t        *pthru;
1616         mbox64_t                *mbox64;
1617         mbox_t                  *mbox;
1618         scb_t                   *scb;
1619         char                    skip[] = "skipping";
1620         char                    scan[] = "scanning";
1621         char                    *ss;
1622
1623
1624         /*
1625          * Get the appropriate device map for the device this command is
1626          * intended for
1627          */
1628         MRAID_GET_DEVICE_MAP(adapter, scp, channel, target, islogical);
1629
1630         /*
1631          * Logical drive commands
1632          */
1633         if (islogical) {
1634                 switch (scp->cmnd[0]) {
1635                 case TEST_UNIT_READY:
1636                         /*
1637                          * Do we support clustering and is the support enabled
1638                          * If no, return success always
1639                          */
1640                         if (!adapter->ha) {
1641                                 scp->result = (DID_OK << 16);
1642                                 return NULL;
1643                         }
1644
1645                         if (!(scb = megaraid_alloc_scb(adapter, scp))) {
1646                                 scp->result = (DID_ERROR << 16);
1647                                 *busy = 1;
1648                                 return NULL;
1649                         }
1650
1651                         scb->dma_direction      = scp->sc_data_direction;
1652                         scb->dev_channel        = 0xFF;
1653                         scb->dev_target         = target;
1654                         ccb                     = (mbox_ccb_t *)scb->ccb;
1655
1656                         /*
1657                          * The command id will be provided by the command
1658                          * issuance routine
1659                          */
1660                         ccb->raw_mbox[0]        = CLUSTER_CMD;
1661                         ccb->raw_mbox[2]        = RESERVATION_STATUS;
1662                         ccb->raw_mbox[3]        = target;
1663
1664                         return scb;
1665
1666                 case MODE_SENSE:
1667                         if (scp->use_sg) {
1668                                 struct scatterlist      *sgl;
1669                                 caddr_t                 vaddr;
1670
1671                                 sgl = (struct scatterlist *)scp->request_buffer;
1672                                 if (sgl->page) {
1673                                         vaddr = (caddr_t)
1674                                                 (page_address((&sgl[0])->page)
1675                                                 + (&sgl[0])->offset);
1676
1677                                         memset(vaddr, 0, scp->cmnd[4]);
1678                                 }
1679                                 else {
1680                                         con_log(CL_ANN, (KERN_WARNING
1681                                         "megaraid mailbox: invalid sg:%d\n",
1682                                         __LINE__));
1683                                 }
1684                         }
1685                         else {
1686                                 memset(scp->request_buffer, 0, scp->cmnd[4]);
1687                         }
1688                         scp->result = (DID_OK << 16);
1689                         return NULL;
1690
1691                 case INQUIRY:
1692                         /*
1693                          * Display the channel scan for logical drives
1694                          * Do not display scan for a channel if already done.
1695                          */
1696                         if (!(rdev->last_disp & (1L << SCP2CHANNEL(scp)))) {
1697
1698                                 con_log(CL_ANN, (KERN_INFO
1699                                         "scsi[%d]: scanning scsi channel %d",
1700                                         adapter->host->host_no,
1701                                         SCP2CHANNEL(scp)));
1702
1703                                 con_log(CL_ANN, (
1704                                         " [virtual] for logical drives\n"));
1705
1706                                 rdev->last_disp |= (1L << SCP2CHANNEL(scp));
1707                         }
1708
1709                         /* Fall through */
1710
1711                 case READ_CAPACITY:
1712                         /*
1713                          * Do not allow LUN > 0 for logical drives and
1714                          * requests for more than 40 logical drives
1715                          */
1716                         if (SCP2LUN(scp)) {
1717                                 scp->result = (DID_BAD_TARGET << 16);
1718                                 return NULL;
1719                         }
1720                         if ((target % 0x80) >= MAX_LOGICAL_DRIVES_40LD) {
1721                                 scp->result = (DID_BAD_TARGET << 16);
1722                                 return NULL;
1723                         }
1724
1725
1726                         /* Allocate a SCB and initialize passthru */
1727                         if (!(scb = megaraid_alloc_scb(adapter, scp))) {
1728                                 scp->result = (DID_ERROR << 16);
1729                                 *busy = 1;
1730                                 return NULL;
1731                         }
1732
1733                         ccb                     = (mbox_ccb_t *)scb->ccb;
1734                         scb->dev_channel        = 0xFF;
1735                         scb->dev_target         = target;
1736                         pthru                   = ccb->pthru;
1737                         mbox                    = ccb->mbox;
1738                         mbox64                  = ccb->mbox64;
1739
1740                         pthru->timeout          = 0;
1741                         pthru->ars              = 1;
1742                         pthru->reqsenselen      = 14;
1743                         pthru->islogical        = 1;
1744                         pthru->logdrv           = target;
1745                         pthru->cdblen           = scp->cmd_len;
1746                         memcpy(pthru->cdb, scp->cmnd, scp->cmd_len);
1747
1748                         mbox->cmd               = MBOXCMD_PASSTHRU64;
1749                         scb->dma_direction      = scp->sc_data_direction;
1750
1751                         pthru->dataxferlen      = scp->request_bufflen;
1752                         pthru->dataxferaddr     = ccb->sgl_dma_h;
1753                         pthru->numsge           = megaraid_mbox_mksgl(adapter,
1754                                                         scb);
1755
1756                         mbox->xferaddr          = 0xFFFFFFFF;
1757                         mbox64->xferaddr_lo     = (uint32_t )ccb->pthru_dma_h;
1758                         mbox64->xferaddr_hi     = 0;
1759
1760                         return scb;
1761
1762                 case READ_6:
1763                 case WRITE_6:
1764                 case READ_10:
1765                 case WRITE_10:
1766                 case READ_12:
1767                 case WRITE_12:
1768
1769                         /*
1770                          * Allocate a SCB and initialize mailbox
1771                          */
1772                         if (!(scb = megaraid_alloc_scb(adapter, scp))) {
1773                                 scp->result = (DID_ERROR << 16);
1774                                 *busy = 1;
1775                                 return NULL;
1776                         }
1777                         ccb                     = (mbox_ccb_t *)scb->ccb;
1778                         scb->dev_channel        = 0xFF;
1779                         scb->dev_target         = target;
1780                         mbox                    = ccb->mbox;
1781                         mbox64                  = ccb->mbox64;
1782                         mbox->logdrv            = target;
1783
1784                         /*
1785                          * A little HACK: 2nd bit is zero for all scsi read
1786                          * commands and is set for all scsi write commands
1787                          */
1788                         mbox->cmd = (scp->cmnd[0] & 0x02) ?  MBOXCMD_LWRITE64:
1789                                         MBOXCMD_LREAD64 ;
1790
1791                         /*
1792                          * 6-byte READ(0x08) or WRITE(0x0A) cdb
1793                          */
1794                         if (scp->cmd_len == 6) {
1795                                 mbox->numsectors = (uint32_t)scp->cmnd[4];
1796                                 mbox->lba =
1797                                         ((uint32_t)scp->cmnd[1] << 16)  |
1798                                         ((uint32_t)scp->cmnd[2] << 8)   |
1799                                         (uint32_t)scp->cmnd[3];
1800
1801                                 mbox->lba &= 0x1FFFFF;
1802                         }
1803
1804                         /*
1805                          * 10-byte READ(0x28) or WRITE(0x2A) cdb
1806                          */
1807                         else if (scp->cmd_len == 10) {
1808                                 mbox->numsectors =
1809                                         (uint32_t)scp->cmnd[8] |
1810                                         ((uint32_t)scp->cmnd[7] << 8);
1811                                 mbox->lba =
1812                                         ((uint32_t)scp->cmnd[2] << 24) |
1813                                         ((uint32_t)scp->cmnd[3] << 16) |
1814                                         ((uint32_t)scp->cmnd[4] << 8) |
1815                                         (uint32_t)scp->cmnd[5];
1816                         }
1817
1818                         /*
1819                          * 12-byte READ(0xA8) or WRITE(0xAA) cdb
1820                          */
1821                         else if (scp->cmd_len == 12) {
1822                                 mbox->lba =
1823                                         ((uint32_t)scp->cmnd[2] << 24) |
1824                                         ((uint32_t)scp->cmnd[3] << 16) |
1825                                         ((uint32_t)scp->cmnd[4] << 8) |
1826                                         (uint32_t)scp->cmnd[5];
1827
1828                                 mbox->numsectors =
1829                                         ((uint32_t)scp->cmnd[6] << 24) |
1830                                         ((uint32_t)scp->cmnd[7] << 16) |
1831                                         ((uint32_t)scp->cmnd[8] << 8) |
1832                                         (uint32_t)scp->cmnd[9];
1833                         }
1834                         else {
1835                                 con_log(CL_ANN, (KERN_WARNING
1836                                         "megaraid: unsupported CDB length\n"));
1837
1838                                 megaraid_dealloc_scb(adapter, scb);
1839
1840                                 scp->result = (DID_ERROR << 16);
1841                                 return NULL;
1842                         }
1843
1844                         scb->dma_direction = scp->sc_data_direction;
1845
1846                         // Calculate Scatter-Gather info
1847                         mbox64->xferaddr_lo     = (uint32_t )ccb->sgl_dma_h;
1848                         mbox->numsge            = megaraid_mbox_mksgl(adapter,
1849                                                         scb);
1850                         mbox->xferaddr          = 0xFFFFFFFF;
1851                         mbox64->xferaddr_hi     = 0;
1852
1853                         return scb;
1854
1855                 case RESERVE:
1856                 case RELEASE:
1857                         /*
1858                          * Do we support clustering and is the support enabled
1859                          */
1860                         if (!adapter->ha) {
1861                                 scp->result = (DID_BAD_TARGET << 16);
1862                                 return NULL;
1863                         }
1864
1865                         /*
1866                          * Allocate a SCB and initialize mailbox
1867                          */
1868                         if (!(scb = megaraid_alloc_scb(adapter, scp))) {
1869                                 scp->result = (DID_ERROR << 16);
1870                                 *busy = 1;
1871                                 return NULL;
1872                         }
1873
1874                         ccb                     = (mbox_ccb_t *)scb->ccb;
1875                         scb->dev_channel        = 0xFF;
1876                         scb->dev_target         = target;
1877                         ccb->raw_mbox[0]        = CLUSTER_CMD;
1878                         ccb->raw_mbox[2]        =  (scp->cmnd[0] == RESERVE) ?
1879                                                 RESERVE_LD : RELEASE_LD;
1880
1881                         ccb->raw_mbox[3]        = target;
1882                         scb->dma_direction      = scp->sc_data_direction;
1883
1884                         return scb;
1885
1886                 default:
1887                         scp->result = (DID_BAD_TARGET << 16);
1888                         return NULL;
1889                 }
1890         }
1891         else { // Passthru device commands
1892
1893                 // Do not allow access to target id > 15 or LUN > 7
1894                 if (target > 15 || SCP2LUN(scp) > 7) {
1895                         scp->result = (DID_BAD_TARGET << 16);
1896                         return NULL;
1897                 }
1898
1899                 // if fast load option was set and scan for last device is
1900                 // over, reset the fast_load flag so that during a possible
1901                 // next scan, devices can be made available
1902                 if (rdev->fast_load && (target == 15) &&
1903                         (SCP2CHANNEL(scp) == adapter->max_channel -1)) {
1904
1905                         con_log(CL_ANN, (KERN_INFO
1906                         "megaraid[%d]: physical device scan re-enabled\n",
1907                                 adapter->host->host_no));
1908                         rdev->fast_load = 0;
1909                 }
1910
1911                 /*
1912                  * Display the channel scan for physical devices
1913                  */
1914                 if (!(rdev->last_disp & (1L << SCP2CHANNEL(scp)))) {
1915
1916                         ss = rdev->fast_load ? skip : scan;
1917
1918                         con_log(CL_ANN, (KERN_INFO
1919                                 "scsi[%d]: %s scsi channel %d [Phy %d]",
1920                                 adapter->host->host_no, ss, SCP2CHANNEL(scp),
1921                                 channel));
1922
1923                         con_log(CL_ANN, (
1924                                 " for non-raid devices\n"));
1925
1926                         rdev->last_disp |= (1L << SCP2CHANNEL(scp));
1927                 }
1928
1929                 // disable channel sweep if fast load option given
1930                 if (rdev->fast_load) {
1931                         scp->result = (DID_BAD_TARGET << 16);
1932                         return NULL;
1933                 }
1934
1935                 // Allocate a SCB and initialize passthru
1936                 if (!(scb = megaraid_alloc_scb(adapter, scp))) {
1937                         scp->result = (DID_ERROR << 16);
1938                         *busy = 1;
1939                         return NULL;
1940                 }
1941
1942                 ccb                     = (mbox_ccb_t *)scb->ccb;
1943                 scb->dev_channel        = channel;
1944                 scb->dev_target         = target;
1945                 scb->dma_direction      = scp->sc_data_direction;
1946                 mbox                    = ccb->mbox;
1947                 mbox64                  = ccb->mbox64;
1948
1949                 // Does this firmware support extended CDBs
1950                 if (adapter->max_cdb_sz == 16) {
1951                         mbox->cmd               = MBOXCMD_EXTPTHRU;
1952
1953                         megaraid_mbox_prepare_epthru(adapter, scb, scp);
1954
1955                         mbox64->xferaddr_lo     = (uint32_t)ccb->epthru_dma_h;
1956                         mbox64->xferaddr_hi     = 0;
1957                         mbox->xferaddr          = 0xFFFFFFFF;
1958                 }
1959                 else {
1960                         mbox->cmd = MBOXCMD_PASSTHRU64;
1961
1962                         megaraid_mbox_prepare_pthru(adapter, scb, scp);
1963
1964                         mbox64->xferaddr_lo     = (uint32_t)ccb->pthru_dma_h;
1965                         mbox64->xferaddr_hi     = 0;
1966                         mbox->xferaddr          = 0xFFFFFFFF;
1967                 }
1968                 return scb;
1969         }
1970
1971         // NOT REACHED
1972 }
1973
1974
1975 /**
1976  * megaraid_mbox_runpendq - execute commands queued in the pending queue
1977  * @adapter     : controller's soft state
1978  * @scb         : SCB to be queued in the pending list
1979  *
1980  * scan the pending list for commands which are not yet issued and try to
1981  * post to the controller. The SCB can be a null pointer, which would indicate
1982  * no SCB to be queue, just try to execute the ones in the pending list.
1983  *
1984  * NOTE: We do not actually traverse the pending list. The SCBs are plucked
1985  * out from the head of the pending list. If it is successfully issued, the
1986  * next SCB is at the head now.
1987  */
1988 static void
1989 megaraid_mbox_runpendq(adapter_t *adapter, scb_t *scb_q)
1990 {
1991         scb_t                   *scb;
1992         unsigned long           flags;
1993
1994         spin_lock_irqsave(PENDING_LIST_LOCK(adapter), flags);
1995
1996         if (scb_q) {
1997                 scb_q->state = SCB_PENDQ;
1998                 list_add_tail(&scb_q->list, &adapter->pend_list);
1999         }
2000
2001         // if the adapter in not in quiescent mode, post the commands to FW
2002         if (adapter->quiescent) {
2003                 spin_unlock_irqrestore(PENDING_LIST_LOCK(adapter), flags);
2004                 return;
2005         }
2006
2007         while (!list_empty(&adapter->pend_list)) {
2008
2009                 assert_spin_locked(PENDING_LIST_LOCK(adapter));
2010
2011                 scb = list_entry(adapter->pend_list.next, scb_t, list);
2012
2013                 // remove the scb from the pending list and try to
2014                 // issue. If we are unable to issue it, put back in
2015                 // the pending list and return
2016
2017                 list_del_init(&scb->list);
2018
2019                 spin_unlock_irqrestore(PENDING_LIST_LOCK(adapter), flags);
2020
2021                 // if mailbox was busy, return SCB back to pending
2022                 // list. Make sure to add at the head, since that's
2023                 // where it would have been removed from
2024
2025                 scb->state = SCB_ISSUED;
2026
2027                 if (mbox_post_cmd(adapter, scb) != 0) {
2028
2029                         spin_lock_irqsave(PENDING_LIST_LOCK(adapter), flags);
2030
2031                         scb->state = SCB_PENDQ;
2032
2033                         list_add(&scb->list, &adapter->pend_list);
2034
2035                         spin_unlock_irqrestore(PENDING_LIST_LOCK(adapter),
2036                                 flags);
2037
2038                         return;
2039                 }
2040
2041                 spin_lock_irqsave(PENDING_LIST_LOCK(adapter), flags);
2042         }
2043
2044         spin_unlock_irqrestore(PENDING_LIST_LOCK(adapter), flags);
2045
2046
2047         return;
2048 }
2049
2050
2051 /**
2052  * megaraid_mbox_prepare_pthru - prepare a command for physical devices
2053  * @adapter     - pointer to controller's soft state
2054  * @scb         - scsi control block
2055  * @scp         - scsi command from the mid-layer
2056  *
2057  * prepare a command for the scsi physical devices
2058  */
2059 static void
2060 megaraid_mbox_prepare_pthru(adapter_t *adapter, scb_t *scb,
2061                 struct scsi_cmnd *scp)
2062 {
2063         mbox_ccb_t              *ccb;
2064         mraid_passthru_t        *pthru;
2065         uint8_t                 channel;
2066         uint8_t                 target;
2067
2068         ccb     = (mbox_ccb_t *)scb->ccb;
2069         pthru   = ccb->pthru;
2070         channel = scb->dev_channel;
2071         target  = scb->dev_target;
2072
2073         // 0=6sec, 1=60sec, 2=10min, 3=3hrs, 4=NO timeout
2074         pthru->timeout          = 4;
2075         pthru->ars              = 1;
2076         pthru->islogical        = 0;
2077         pthru->channel          = 0;
2078         pthru->target           = (channel << 4) | target;
2079         pthru->logdrv           = SCP2LUN(scp);
2080         pthru->reqsenselen      = 14;
2081         pthru->cdblen           = scp->cmd_len;
2082
2083         memcpy(pthru->cdb, scp->cmnd, scp->cmd_len);
2084
2085         if (scp->request_bufflen) {
2086                 pthru->dataxferlen      = scp->request_bufflen;
2087                 pthru->dataxferaddr     = ccb->sgl_dma_h;
2088                 pthru->numsge           = megaraid_mbox_mksgl(adapter, scb);
2089         }
2090         else {
2091                 pthru->dataxferaddr     = 0;
2092                 pthru->dataxferlen      = 0;
2093                 pthru->numsge           = 0;
2094         }
2095         return;
2096 }
2097
2098
2099 /**
2100  * megaraid_mbox_prepare_epthru - prepare a command for physical devices
2101  * @adapter     - pointer to controller's soft state
2102  * @scb         - scsi control block
2103  * @scp         - scsi command from the mid-layer
2104  *
2105  * prepare a command for the scsi physical devices. This rountine prepares
2106  * commands for devices which can take extended CDBs (>10 bytes)
2107  */
2108 static void
2109 megaraid_mbox_prepare_epthru(adapter_t *adapter, scb_t *scb,
2110                 struct scsi_cmnd *scp)
2111 {
2112         mbox_ccb_t              *ccb;
2113         mraid_epassthru_t       *epthru;
2114         uint8_t                 channel;
2115         uint8_t                 target;
2116
2117         ccb     = (mbox_ccb_t *)scb->ccb;
2118         epthru  = ccb->epthru;
2119         channel = scb->dev_channel;
2120         target  = scb->dev_target;
2121
2122         // 0=6sec, 1=60sec, 2=10min, 3=3hrs, 4=NO timeout
2123         epthru->timeout         = 4;
2124         epthru->ars             = 1;
2125         epthru->islogical       = 0;
2126         epthru->channel         = 0;
2127         epthru->target          = (channel << 4) | target;
2128         epthru->logdrv          = SCP2LUN(scp);
2129         epthru->reqsenselen     = 14;
2130         epthru->cdblen          = scp->cmd_len;
2131
2132         memcpy(epthru->cdb, scp->cmnd, scp->cmd_len);
2133
2134         if (scp->request_bufflen) {
2135                 epthru->dataxferlen     = scp->request_bufflen;
2136                 epthru->dataxferaddr    = ccb->sgl_dma_h;
2137                 epthru->numsge          = megaraid_mbox_mksgl(adapter, scb);
2138         }
2139         else {
2140                 epthru->dataxferaddr    = 0;
2141                 epthru->dataxferlen     = 0;
2142                 epthru->numsge          = 0;
2143         }
2144         return;
2145 }
2146
2147
2148 /**
2149  * megaraid_ack_sequence - interrupt ack sequence for memory mapped HBAs
2150  * @adapter     - controller's soft state
2151  *
2152  * Interrupt ackrowledgement sequence for memory mapped HBAs. Find out the
2153  * completed command and put them on the completed list for later processing.
2154  *
2155  * Returns:     1 if the interrupt is valid, 0 otherwise
2156  */
2157 static inline int
2158 megaraid_ack_sequence(adapter_t *adapter)
2159 {
2160         mraid_device_t          *raid_dev = ADAP2RAIDDEV(adapter);
2161         mbox_t                  *mbox;
2162         scb_t                   *scb;
2163         uint8_t                 nstatus;
2164         uint8_t                 completed[MBOX_MAX_FIRMWARE_STATUS];
2165         struct list_head        clist;
2166         int                     handled;
2167         uint32_t                dword;
2168         unsigned long           flags;
2169         int                     i, j;
2170
2171
2172         mbox    = raid_dev->mbox;
2173
2174         // move the SCBs from the firmware completed array to our local list
2175         INIT_LIST_HEAD(&clist);
2176
2177         // loop till F/W has more commands for us to complete
2178         handled = 0;
2179         spin_lock_irqsave(MAILBOX_LOCK(raid_dev), flags);
2180         do {
2181                 /*
2182                  * Check if a valid interrupt is pending. If found, force the
2183                  * interrupt line low.
2184                  */
2185                 dword = RDOUTDOOR(raid_dev);
2186                 if (dword != 0x10001234) break;
2187
2188                 handled = 1;
2189
2190                 WROUTDOOR(raid_dev, 0x10001234);
2191
2192                 nstatus = 0;
2193                 // wait for valid numstatus to post
2194                 for (i = 0; i < 0xFFFFF; i++) {
2195                         if (mbox->numstatus != 0xFF) {
2196                                 nstatus = mbox->numstatus;
2197                                 break;
2198                         }
2199                         rmb();
2200                 }
2201                 mbox->numstatus = 0xFF;
2202
2203                 adapter->outstanding_cmds -= nstatus;
2204
2205                 for (i = 0; i < nstatus; i++) {
2206
2207                         // wait for valid command index to post
2208                         for (j = 0; j < 0xFFFFF; j++) {
2209                                 if (mbox->completed[i] != 0xFF) break;
2210                                 rmb();
2211                         }
2212                         completed[i]            = mbox->completed[i];
2213                         mbox->completed[i]      = 0xFF;
2214
2215                         if (completed[i] == 0xFF) {
2216                                 con_log(CL_ANN, (KERN_CRIT
2217                                 "megaraid: command posting timed out\n"));
2218
2219                                 BUG();
2220                                 continue;
2221                         }
2222
2223                         // Get SCB associated with this command id
2224                         if (completed[i] >= MBOX_MAX_SCSI_CMDS) {
2225                                 // a cmm command
2226                                 scb = adapter->uscb_list + (completed[i] -
2227                                                 MBOX_MAX_SCSI_CMDS);
2228                         }
2229                         else {
2230                                 // an os command
2231                                 scb = adapter->kscb_list + completed[i];
2232                         }
2233
2234                         scb->status = mbox->status;
2235                         list_add_tail(&scb->list, &clist);
2236                 }
2237
2238                 // Acknowledge interrupt
2239                 WRINDOOR(raid_dev, 0x02);
2240
2241         } while(1);
2242
2243         spin_unlock_irqrestore(MAILBOX_LOCK(raid_dev), flags);
2244
2245
2246         // put the completed commands in the completed list. DPC would
2247         // complete these commands later
2248         spin_lock_irqsave(COMPLETED_LIST_LOCK(adapter), flags);
2249
2250         list_splice(&clist, &adapter->completed_list);
2251
2252         spin_unlock_irqrestore(COMPLETED_LIST_LOCK(adapter), flags);
2253
2254
2255         // schedule the DPC if there is some work for it
2256         if (handled)
2257                 tasklet_schedule(&adapter->dpc_h);
2258
2259         return handled;
2260 }
2261
2262
2263 /**
2264  * megaraid_isr - isr for memory based mailbox based controllers
2265  * @irq         - irq
2266  * @devp        - pointer to our soft state
2267  * @regs        - unused
2268  *
2269  * Interrupt service routine for memory-mapped mailbox controllers.
2270  */
2271 static irqreturn_t
2272 megaraid_isr(int irq, void *devp, struct pt_regs *regs)
2273 {
2274         adapter_t       *adapter = devp;
2275         int             handled;
2276
2277         handled = megaraid_ack_sequence(adapter);
2278
2279         /* Loop through any pending requests */
2280         if (!adapter->quiescent) {
2281                 megaraid_mbox_runpendq(adapter, NULL);
2282         }
2283
2284         return IRQ_RETVAL(handled);
2285 }
2286
2287
2288 /**
2289  * megaraid_mbox_sync_scb - sync kernel buffers
2290  * @adapter     : controller's soft state
2291  * @scb         : pointer to the resource packet
2292  *
2293  * DMA sync if required.
2294  */
2295 static inline void
2296 megaraid_mbox_sync_scb(adapter_t *adapter, scb_t *scb)
2297 {
2298         mbox_ccb_t      *ccb;
2299
2300         ccb     = (mbox_ccb_t *)scb->ccb;
2301
2302         switch (scb->dma_type) {
2303
2304         case MRAID_DMA_WBUF:
2305                 if (scb->dma_direction == PCI_DMA_FROMDEVICE) {
2306                         pci_dma_sync_single_for_cpu(adapter->pdev,
2307                                         ccb->buf_dma_h,
2308                                         scb->scp->request_bufflen,
2309                                         PCI_DMA_FROMDEVICE);
2310                 }
2311
2312                 pci_unmap_page(adapter->pdev, ccb->buf_dma_h,
2313                         scb->scp->request_bufflen, scb->dma_direction);
2314
2315                 break;
2316
2317         case MRAID_DMA_WSG:
2318                 if (scb->dma_direction == PCI_DMA_FROMDEVICE) {
2319                         pci_dma_sync_sg_for_cpu(adapter->pdev,
2320                                         scb->scp->request_buffer,
2321                                         scb->scp->use_sg, PCI_DMA_FROMDEVICE);
2322                 }
2323
2324                 pci_unmap_sg(adapter->pdev, scb->scp->request_buffer,
2325                         scb->scp->use_sg, scb->dma_direction);
2326
2327                 break;
2328
2329         default:
2330                 break;
2331         }
2332
2333         return;
2334 }
2335
2336
2337 /**
2338  * megaraid_mbox_dpc - the tasklet to complete the commands from completed list
2339  * @devp        : pointer to HBA soft state
2340  *
2341  * Pick up the commands from the completed list and send back to the owners.
2342  * This is a reentrant function and does not assume any locks are held while
2343  * it is being called.
2344  */
2345 static void
2346 megaraid_mbox_dpc(unsigned long devp)
2347 {
2348         adapter_t               *adapter = (adapter_t *)devp;
2349         mraid_device_t          *raid_dev;
2350         struct list_head        clist;
2351         struct scatterlist      *sgl;
2352         scb_t                   *scb;
2353         scb_t                   *tmp;
2354         struct scsi_cmnd        *scp;
2355         mraid_passthru_t        *pthru;
2356         mraid_epassthru_t       *epthru;
2357         mbox_ccb_t              *ccb;
2358         int                     islogical;
2359         int                     pdev_index;
2360         int                     pdev_state;
2361         mbox_t                  *mbox;
2362         unsigned long           flags;
2363         uint8_t                 c;
2364         int                     status;
2365
2366
2367         if (!adapter) return;
2368
2369         raid_dev = ADAP2RAIDDEV(adapter);
2370
2371         // move the SCBs from the completed list to our local list
2372         INIT_LIST_HEAD(&clist);
2373
2374         spin_lock_irqsave(COMPLETED_LIST_LOCK(adapter), flags);
2375
2376         list_splice_init(&adapter->completed_list, &clist);
2377
2378         spin_unlock_irqrestore(COMPLETED_LIST_LOCK(adapter), flags);
2379
2380
2381         list_for_each_entry_safe(scb, tmp, &clist, list) {
2382
2383                 status          = scb->status;
2384                 scp             = scb->scp;
2385                 ccb             = (mbox_ccb_t *)scb->ccb;
2386                 pthru           = ccb->pthru;
2387                 epthru          = ccb->epthru;
2388                 mbox            = ccb->mbox;
2389
2390                 // Make sure f/w has completed a valid command
2391                 if (scb->state != SCB_ISSUED) {
2392                         con_log(CL_ANN, (KERN_CRIT
2393                         "megaraid critical err: invalid command %d:%d:%p\n",
2394                                 scb->sno, scb->state, scp));
2395                         BUG();
2396                         continue;       // Must never happen!
2397                 }
2398
2399                 // check for the management command and complete it right away
2400                 if (scb->sno >= MBOX_MAX_SCSI_CMDS) {
2401                         scb->state      = SCB_FREE;
2402                         scb->status     = status;
2403
2404                         // remove from local clist
2405                         list_del_init(&scb->list);
2406
2407                         megaraid_mbox_mm_done(adapter, scb);
2408
2409                         continue;
2410                 }
2411
2412                 // Was an abort issued for this command earlier
2413                 if (scb->state & SCB_ABORT) {
2414                         con_log(CL_ANN, (KERN_NOTICE
2415                         "megaraid: aborted cmd %lx[%x] completed\n",
2416                                 scp->serial_number, scb->sno));
2417                 }
2418
2419                 /*
2420                  * If the inquiry came of a disk drive which is not part of
2421                  * any RAID array, expose it to the kernel. For this to be
2422                  * enabled, user must set the "megaraid_expose_unconf_disks"
2423                  * flag to 1 by specifying it on module parameter list.
2424                  * This would enable data migration off drives from other
2425                  * configurations.
2426                  */
2427                 islogical = MRAID_IS_LOGICAL(adapter, scp);
2428                 if (scp->cmnd[0] == INQUIRY && status == 0 && islogical == 0
2429                                 && IS_RAID_CH(raid_dev, scb->dev_channel)) {
2430
2431                         if (scp->use_sg) {
2432                                 sgl = (struct scatterlist *)
2433                                         scp->request_buffer;
2434
2435                                 if (sgl->page) {
2436                                         c = *(unsigned char *)
2437                                         (page_address((&sgl[0])->page) +
2438                                                 (&sgl[0])->offset);
2439                                 }
2440                                 else {
2441                                         con_log(CL_ANN, (KERN_WARNING
2442                                         "megaraid mailbox: invalid sg:%d\n",
2443                                         __LINE__));
2444                                         c = 0;
2445                                 }
2446                         }
2447                         else {
2448                                 c = *(uint8_t *)scp->request_buffer;
2449                         }
2450
2451                         if ((c & 0x1F ) == TYPE_DISK) {
2452                                 pdev_index = (scb->dev_channel * 16) +
2453                                         scb->dev_target;
2454                                 pdev_state =
2455                                         raid_dev->pdrv_state[pdev_index] & 0x0F;
2456
2457                                 if (pdev_state == PDRV_ONLINE           ||
2458                                         pdev_state == PDRV_FAILED       ||
2459                                         pdev_state == PDRV_RBLD         ||
2460                                         pdev_state == PDRV_HOTSPARE     ||
2461                                         megaraid_expose_unconf_disks == 0) {
2462
2463                                         status = 0xF0;
2464                                 }
2465                         }
2466                 }
2467
2468                 // Convert MegaRAID status to Linux error code
2469                 switch (status) {
2470
2471                 case 0x00:
2472
2473                         scp->result = (DID_OK << 16);
2474                         break;
2475
2476                 case 0x02:
2477
2478                         /* set sense_buffer and result fields */
2479                         if (mbox->cmd == MBOXCMD_PASSTHRU ||
2480                                 mbox->cmd == MBOXCMD_PASSTHRU64) {
2481
2482                                 memcpy(scp->sense_buffer, pthru->reqsensearea,
2483                                                 14);
2484
2485                                 scp->result = DRIVER_SENSE << 24 |
2486                                         DID_OK << 16 | CHECK_CONDITION << 1;
2487                         }
2488                         else {
2489                                 if (mbox->cmd == MBOXCMD_EXTPTHRU) {
2490
2491                                         memcpy(scp->sense_buffer,
2492                                                 epthru->reqsensearea, 14);
2493
2494                                         scp->result = DRIVER_SENSE << 24 |
2495                                                 DID_OK << 16 |
2496                                                 CHECK_CONDITION << 1;
2497                                 } else {
2498                                         scp->sense_buffer[0] = 0x70;
2499                                         scp->sense_buffer[2] = ABORTED_COMMAND;
2500                                         scp->result = CHECK_CONDITION << 1;
2501                                 }
2502                         }
2503                         break;
2504
2505                 case 0x08:
2506
2507                         scp->result = DID_BUS_BUSY << 16 | status;
2508                         break;
2509
2510                 default:
2511
2512                         /*
2513                          * If TEST_UNIT_READY fails, we know RESERVATION_STATUS
2514                          * failed
2515                          */
2516                         if (scp->cmnd[0] == TEST_UNIT_READY) {
2517                                 scp->result = DID_ERROR << 16 |
2518                                         RESERVATION_CONFLICT << 1;
2519                         }
2520                         else
2521                         /*
2522                          * Error code returned is 1 if Reserve or Release
2523                          * failed or the input parameter is invalid
2524                          */
2525                         if (status == 1 && (scp->cmnd[0] == RESERVE ||
2526                                          scp->cmnd[0] == RELEASE)) {
2527
2528                                 scp->result = DID_ERROR << 16 |
2529                                         RESERVATION_CONFLICT << 1;
2530                         }
2531                         else {
2532                                 scp->result = DID_BAD_TARGET << 16 | status;
2533                         }
2534                 }
2535
2536                 // print a debug message for all failed commands
2537                 if (status) {
2538                         megaraid_mbox_display_scb(adapter, scb);
2539                 }
2540
2541                 // Free our internal resources and call the mid-layer callback
2542                 // routine
2543                 megaraid_mbox_sync_scb(adapter, scb);
2544
2545                 // remove from local clist
2546                 list_del_init(&scb->list);
2547
2548                 // put back in free list
2549                 megaraid_dealloc_scb(adapter, scb);
2550
2551                 // send the scsi packet back to kernel
2552                 spin_lock(adapter->host_lock);
2553                 scp->scsi_done(scp);
2554                 spin_unlock(adapter->host_lock);
2555         }
2556
2557         return;
2558 }
2559
2560
2561 /**
2562  * megaraid_abort_handler - abort the scsi command
2563  * @scp         : command to be aborted
2564  *
2565  * Abort a previous SCSI request. Only commands on the pending list can be
2566  * aborted. All the commands issued to the F/W must complete.
2567  **/
2568 static int
2569 __megaraid_abort_handler(struct scsi_cmnd *scp)
2570 {
2571         adapter_t               *adapter;
2572         mraid_device_t          *raid_dev;
2573         scb_t                   *scb;
2574         scb_t                   *tmp;
2575         int                     found;
2576         unsigned long           flags;
2577         int                     i;
2578
2579
2580         adapter         = SCP2ADAPTER(scp);
2581         raid_dev        = ADAP2RAIDDEV(adapter);
2582
2583         assert_spin_locked(adapter->host_lock);
2584
2585         con_log(CL_ANN, (KERN_WARNING
2586                 "megaraid: aborting-%ld cmd=%x <c=%d t=%d l=%d>\n",
2587                 scp->serial_number, scp->cmnd[0], SCP2CHANNEL(scp),
2588                 SCP2TARGET(scp), SCP2LUN(scp)));
2589
2590         // If FW has stopped responding, simply return failure
2591         if (raid_dev->hw_error) {
2592                 con_log(CL_ANN, (KERN_NOTICE
2593                         "megaraid: hw error, not aborting\n"));
2594                 return FAILED;
2595         }
2596
2597         // There might a race here, where the command was completed by the
2598         // firmware and now it is on the completed list. Before we could
2599         // complete the command to the kernel in dpc, the abort came.
2600         // Find out if this is the case to avoid the race.
2601         scb = NULL;
2602         spin_lock_irqsave(COMPLETED_LIST_LOCK(adapter), flags);
2603         list_for_each_entry_safe(scb, tmp, &adapter->completed_list, list) {
2604
2605                 if (scb->scp == scp) {  // Found command
2606
2607                         list_del_init(&scb->list);      // from completed list
2608
2609                         con_log(CL_ANN, (KERN_WARNING
2610                         "megaraid: %ld:%d[%d:%d], abort from completed list\n",
2611                                 scp->serial_number, scb->sno,
2612                                 scb->dev_channel, scb->dev_target));
2613
2614                         scp->result = (DID_ABORT << 16);
2615                         scp->scsi_done(scp);
2616
2617                         megaraid_dealloc_scb(adapter, scb);
2618
2619                         spin_unlock_irqrestore(COMPLETED_LIST_LOCK(adapter),
2620                                 flags);
2621
2622                         return SUCCESS;
2623                 }
2624         }
2625         spin_unlock_irqrestore(COMPLETED_LIST_LOCK(adapter), flags);
2626
2627
2628         // Find out if this command is still on the pending list. If it is and
2629         // was never issued, abort and return success. If the command is owned
2630         // by the firmware, we must wait for it to complete by the FW.
2631         spin_lock_irqsave(PENDING_LIST_LOCK(adapter), flags);
2632         list_for_each_entry_safe(scb, tmp, &adapter->pend_list, list) {
2633
2634                 if (scb->scp == scp) {  // Found command
2635
2636                         list_del_init(&scb->list);      // from pending list
2637
2638                         ASSERT(!(scb->state & SCB_ISSUED));
2639
2640                         con_log(CL_ANN, (KERN_WARNING
2641                                 "megaraid abort: %ld[%d:%d], driver owner\n",
2642                                 scp->serial_number, scb->dev_channel,
2643                                 scb->dev_target));
2644
2645                         scp->result = (DID_ABORT << 16);
2646                         scp->scsi_done(scp);
2647
2648                         megaraid_dealloc_scb(adapter, scb);
2649
2650                         spin_unlock_irqrestore(PENDING_LIST_LOCK(adapter),
2651                                 flags);
2652
2653                         return SUCCESS;
2654                 }
2655         }
2656         spin_unlock_irqrestore(PENDING_LIST_LOCK(adapter), flags);
2657
2658
2659         // Check do we even own this command, in which case this would be
2660         // owned by the firmware. The only way to locate the FW scb is to
2661         // traverse through the list of all SCB, since driver does not
2662         // maintain these SCBs on any list
2663         found = 0;
2664         for (i = 0; i < MBOX_MAX_SCSI_CMDS; i++) {
2665                 scb = adapter->kscb_list + i;
2666
2667                 if (scb->scp == scp) {
2668
2669                         found = 1;
2670
2671                         if (!(scb->state & SCB_ISSUED)) {
2672                                 con_log(CL_ANN, (KERN_WARNING
2673                                 "megaraid abort: %ld%d[%d:%d], invalid state\n",
2674                                 scp->serial_number, scb->sno, scb->dev_channel,
2675                                 scb->dev_target));
2676                                 BUG();
2677                         }
2678                         else {
2679                                 con_log(CL_ANN, (KERN_WARNING
2680                                 "megaraid abort: %ld:%d[%d:%d], fw owner\n",
2681                                 scp->serial_number, scb->sno, scb->dev_channel,
2682                                 scb->dev_target));
2683                         }
2684                 }
2685         }
2686
2687         if (!found) {
2688                 con_log(CL_ANN, (KERN_WARNING
2689                         "megaraid abort: scsi cmd:%ld, do now own\n",
2690                         scp->serial_number));
2691
2692                 // FIXME: Should there be a callback for this command?
2693                 return SUCCESS;
2694         }
2695
2696         // We cannot actually abort a command owned by firmware, return
2697         // failure and wait for reset. In host reset handler, we will find out
2698         // if the HBA is still live
2699         return FAILED;
2700 }
2701
2702 static int
2703 megaraid_abort_handler(struct scsi_cmnd *scp)
2704 {
2705         adapter_t       *adapter;
2706         int rc;
2707
2708         adapter         = SCP2ADAPTER(scp);
2709
2710         spin_lock_irq(adapter->host_lock);
2711         rc = __megaraid_abort_handler(scp);
2712         spin_unlock_irq(adapter->host_lock);
2713
2714         return rc;
2715 }
2716
2717
2718 /**
2719  * megaraid_reset_handler - device reset hadler for mailbox based driver
2720  * @scp         : reference command
2721  *
2722  * Reset handler for the mailbox based controller. First try to find out if
2723  * the FW is still live, in which case the outstanding commands counter mut go
2724  * down to 0. If that happens, also issue the reservation reset command to
2725  * relinquish (possible) reservations on the logical drives connected to this
2726  * host
2727  **/
2728 static int
2729 __megaraid_reset_handler(struct scsi_cmnd *scp)
2730 {
2731         adapter_t       *adapter;
2732         scb_t           *scb;
2733         scb_t           *tmp;
2734         mraid_device_t  *raid_dev;
2735         unsigned long   flags;
2736         uint8_t         raw_mbox[sizeof(mbox_t)];
2737         int             rval;
2738         int             recovery_window;
2739         int             recovering;
2740         int             i;
2741
2742         adapter         = SCP2ADAPTER(scp);
2743         raid_dev        = ADAP2RAIDDEV(adapter);
2744
2745         assert_spin_locked(adapter->host_lock);
2746
2747         con_log(CL_ANN, (KERN_WARNING "megaraid: reseting the host...\n"));
2748
2749         // return failure if adapter is not responding
2750         if (raid_dev->hw_error) {
2751                 con_log(CL_ANN, (KERN_NOTICE
2752                         "megaraid: hw error, cannot reset\n"));
2753                 return FAILED;
2754         }
2755
2756
2757         // Under exceptional conditions, FW can take up to 3 minutes to
2758         // complete command processing. Wait for additional 2 minutes for the
2759         // pending commands counter to go down to 0. If it doesn't, let the
2760         // controller be marked offline
2761         // Also, reset all the commands currently owned by the driver
2762         spin_lock_irqsave(PENDING_LIST_LOCK(adapter), flags);
2763         list_for_each_entry_safe(scb, tmp, &adapter->pend_list, list) {
2764
2765                 list_del_init(&scb->list);      // from pending list
2766
2767                 con_log(CL_ANN, (KERN_WARNING
2768                         "megaraid: %ld:%d[%d:%d], reset from pending list\n",
2769                                 scp->serial_number, scb->sno,
2770                                 scb->dev_channel, scb->dev_target));
2771
2772                 scp->result = (DID_RESET << 16);
2773                 scp->scsi_done(scp);
2774
2775                 megaraid_dealloc_scb(adapter, scb);
2776         }
2777         spin_unlock_irqrestore(PENDING_LIST_LOCK(adapter), flags);
2778
2779         if (adapter->outstanding_cmds) {
2780                 con_log(CL_ANN, (KERN_NOTICE
2781                         "megaraid: %d outstanding commands. Max wait %d sec\n",
2782                         adapter->outstanding_cmds, MBOX_RESET_WAIT));
2783         }
2784
2785         spin_unlock(adapter->host_lock);
2786
2787         recovery_window = MBOX_RESET_WAIT + MBOX_RESET_EXT_WAIT;
2788
2789         recovering = adapter->outstanding_cmds;
2790
2791         for (i = 0; i < recovery_window && adapter->outstanding_cmds; i++) {
2792
2793                 megaraid_ack_sequence(adapter);
2794
2795                 // print a message once every 5 seconds only
2796                 if (!(i % 5)) {
2797                         con_log(CL_ANN, (
2798                         "megaraid mbox: Wait for %d commands to complete:%d\n",
2799                                 adapter->outstanding_cmds,
2800                                 MBOX_RESET_WAIT - i));
2801                 }
2802
2803                 // bailout if no recovery happended in reset time
2804                 if ((i == MBOX_RESET_WAIT) &&
2805                         (recovering == adapter->outstanding_cmds)) {
2806                         break;
2807                 }
2808
2809                 msleep(1000);
2810         }
2811
2812         spin_lock(adapter->host_lock);
2813
2814         // If still outstanding commands, bail out
2815         if (adapter->outstanding_cmds) {
2816                 con_log(CL_ANN, (KERN_WARNING
2817                         "megaraid mbox: critical hardware error!\n"));
2818
2819                 raid_dev->hw_error = 1;
2820
2821                 return FAILED;
2822         }
2823         else {
2824                 con_log(CL_ANN, (KERN_NOTICE
2825                 "megaraid mbox: reset sequence completed sucessfully\n"));
2826         }
2827
2828
2829         // If the controller supports clustering, reset reservations
2830         if (!adapter->ha) return SUCCESS;
2831
2832         // clear reservations if any
2833         raw_mbox[0] = CLUSTER_CMD;
2834         raw_mbox[2] = RESET_RESERVATIONS;
2835
2836         rval = SUCCESS;
2837         if (mbox_post_sync_cmd_fast(adapter, raw_mbox) == 0) {
2838                 con_log(CL_ANN,
2839                         (KERN_INFO "megaraid: reservation reset\n"));
2840         }
2841         else {
2842                 rval = FAILED;
2843                 con_log(CL_ANN, (KERN_WARNING
2844                                 "megaraid: reservation reset failed\n"));
2845         }
2846
2847         return rval;
2848 }
2849
2850 static int
2851 megaraid_reset_handler(struct scsi_cmnd *cmd)
2852 {
2853         int rc;
2854
2855         spin_lock_irq(cmd->device->host->host_lock);
2856         rc = __megaraid_reset_handler(cmd);
2857         spin_unlock_irq(cmd->device->host->host_lock);
2858
2859         return rc;
2860 }
2861
2862
2863 /*
2864  * START: internal commands library
2865  *
2866  * This section of the driver has the common routine used by the driver and
2867  * also has all the FW routines
2868  */
2869
2870 /**
2871  * mbox_post_sync_cmd() - blocking command to the mailbox based controllers
2872  * @adapter     - controller's soft state
2873  * @raw_mbox    - the mailbox
2874  *
2875  * Issue a scb in synchronous and non-interrupt mode for mailbox based
2876  * controllers
2877  */
2878 static int
2879 mbox_post_sync_cmd(adapter_t *adapter, uint8_t raw_mbox[])
2880 {
2881         mraid_device_t  *raid_dev = ADAP2RAIDDEV(adapter);
2882         mbox64_t        *mbox64;
2883         mbox_t          *mbox;
2884         uint8_t         status;
2885         int             i;
2886
2887
2888         mbox64  = raid_dev->mbox64;
2889         mbox    = raid_dev->mbox;
2890
2891         /*
2892          * Wait until mailbox is free
2893          */
2894         if (megaraid_busywait_mbox(raid_dev) != 0)
2895                 goto blocked_mailbox;
2896
2897         /*
2898          * Copy mailbox data into host structure
2899          */
2900         memcpy((caddr_t)mbox, (caddr_t)raw_mbox, 16);
2901         mbox->cmdid             = 0xFE;
2902         mbox->busy              = 1;
2903         mbox->poll              = 0;
2904         mbox->ack               = 0;
2905         mbox->numstatus         = 0xFF;
2906         mbox->status            = 0xFF;
2907
2908         wmb();
2909         WRINDOOR(raid_dev, raid_dev->mbox_dma | 0x1);
2910
2911         // wait for maximum 1 second for status to post. If the status is not
2912         // available within 1 second, assume FW is initializing and wait
2913         // for an extended amount of time
2914         if (mbox->numstatus == 0xFF) {  // status not yet available
2915                 udelay(25);;
2916
2917                 for (i = 0; mbox->numstatus == 0xFF && i < 1000; i++) {
2918                         rmb();
2919                         msleep(1);
2920                 }
2921
2922
2923                 if (i == 1000) {
2924                         con_log(CL_ANN, (KERN_NOTICE
2925                                 "megaraid mailbox: wait for FW to boot      "));
2926
2927                         for (i = 0; (mbox->numstatus == 0xFF) &&
2928                                         (i < MBOX_RESET_WAIT); i++) {
2929                                 rmb();
2930                                 con_log(CL_ANN, ("\b\b\b\b\b[%03d]",
2931                                                         MBOX_RESET_WAIT - i));
2932                                 msleep(1000);
2933                         }
2934
2935                         if (i == MBOX_RESET_WAIT) {
2936
2937                                 con_log(CL_ANN, (
2938                                 "\nmegaraid mailbox: status not available\n"));
2939
2940                                 return -1;
2941                         }
2942                         con_log(CL_ANN, ("\b\b\b\b\b[ok] \n"));
2943                 }
2944         }
2945
2946         // wait for maximum 1 second for poll semaphore
2947         if (mbox->poll != 0x77) {
2948                 udelay(25);
2949
2950                 for (i = 0; (mbox->poll != 0x77) && (i < 1000); i++) {
2951                         rmb();
2952                         msleep(1);
2953                 }
2954
2955                 if (i == 1000) {
2956                         con_log(CL_ANN, (KERN_WARNING
2957                         "megaraid mailbox: could not get poll semaphore\n"));
2958                         return -1;
2959                 }
2960         }
2961
2962         WRINDOOR(raid_dev, raid_dev->mbox_dma | 0x2);
2963         wmb();
2964
2965         // wait for maximum 1 second for acknowledgement
2966         if (RDINDOOR(raid_dev) & 0x2) {
2967                 udelay(25);
2968
2969                 for (i = 0; (RDINDOOR(raid_dev) & 0x2) && (i < 1000); i++) {
2970                         rmb();
2971                         msleep(1);
2972                 }
2973
2974                 if (i == 1000) {
2975                         con_log(CL_ANN, (KERN_WARNING
2976                                 "megaraid mailbox: could not acknowledge\n"));
2977                         return -1;
2978                 }
2979         }
2980         mbox->poll      = 0;
2981         mbox->ack       = 0x77;
2982
2983         status = mbox->status;
2984
2985         // invalidate the completed command id array. After command
2986         // completion, firmware would write the valid id.
2987         mbox->numstatus = 0xFF;
2988         mbox->status    = 0xFF;
2989         for (i = 0; i < MBOX_MAX_FIRMWARE_STATUS; i++) {
2990                 mbox->completed[i] = 0xFF;
2991         }
2992
2993         return status;
2994
2995 blocked_mailbox:
2996
2997         con_log(CL_ANN, (KERN_WARNING "megaraid: blocked mailbox\n") );
2998         return -1;
2999 }
3000
3001
3002 /**
3003  * mbox_post_sync_cmd_fast - blocking command to the mailbox based controllers
3004  * @adapter     - controller's soft state
3005  * @raw_mbox    - the mailbox
3006  *
3007  * Issue a scb in synchronous and non-interrupt mode for mailbox based
3008  * controllers. This is a faster version of the synchronous command and
3009  * therefore can be called in interrupt-context as well
3010  */
3011 static int
3012 mbox_post_sync_cmd_fast(adapter_t *adapter, uint8_t raw_mbox[])
3013 {
3014         mraid_device_t  *raid_dev = ADAP2RAIDDEV(adapter);
3015         mbox_t          *mbox;
3016         long            i;
3017
3018
3019         mbox    = raid_dev->mbox;
3020
3021         // return immediately if the mailbox is busy
3022         if (mbox->busy) return -1;
3023
3024         // Copy mailbox data into host structure
3025         memcpy((caddr_t)mbox, (caddr_t)raw_mbox, 14);
3026         mbox->cmdid             = 0xFE;
3027         mbox->busy              = 1;
3028         mbox->poll              = 0;
3029         mbox->ack               = 0;
3030         mbox->numstatus         = 0xFF;
3031         mbox->status            = 0xFF;
3032
3033         wmb();
3034         WRINDOOR(raid_dev, raid_dev->mbox_dma | 0x1);
3035
3036         for (i = 0; i < 0xFFFFF; i++) {
3037                 if (mbox->numstatus != 0xFF) break;
3038         }
3039
3040         if (i == 0xFFFFF) {
3041                 // We may need to re-calibrate the counter
3042                 con_log(CL_ANN, (KERN_CRIT
3043                         "megaraid: fast sync command timed out\n"));
3044         }
3045
3046         WRINDOOR(raid_dev, raid_dev->mbox_dma | 0x2);
3047         wmb();
3048
3049         return mbox->status;
3050 }
3051
3052
3053 /**
3054  * megaraid_busywait_mbox() - Wait until the controller's mailbox is available
3055  * @raid_dev    - RAID device (HBA) soft state
3056  *
3057  * wait until the controller's mailbox is available to accept more commands.
3058  * wait for at most 1 second
3059  */
3060 static int
3061 megaraid_busywait_mbox(mraid_device_t *raid_dev)
3062 {
3063         mbox_t  *mbox = raid_dev->mbox;
3064         int     i = 0;
3065
3066         if (mbox->busy) {
3067                 udelay(25);
3068                 for (i = 0; mbox->busy && i < 1000; i++)
3069                         msleep(1);
3070         }
3071
3072         if (i < 1000) return 0;
3073         else return -1;
3074 }
3075
3076
3077 /**
3078  * megaraid_mbox_product_info - some static information about the controller
3079  * @adapter     - our soft state
3080  *
3081  * issue commands to the controller to grab some parameters required by our
3082  * caller.
3083  */
3084 static int
3085 megaraid_mbox_product_info(adapter_t *adapter)
3086 {
3087         mraid_device_t          *raid_dev = ADAP2RAIDDEV(adapter);
3088         mbox_t                  *mbox;
3089         uint8_t                 raw_mbox[sizeof(mbox_t)];
3090         mraid_pinfo_t           *pinfo;
3091         dma_addr_t              pinfo_dma_h;
3092         mraid_inquiry3_t        *mraid_inq3;
3093         int                     i;
3094
3095
3096         memset((caddr_t)raw_mbox, 0, sizeof(raw_mbox));
3097         mbox = (mbox_t *)raw_mbox;
3098
3099         /*
3100          * Issue an ENQUIRY3 command to find out certain adapter parameters,
3101          * e.g., max channels, max commands etc.
3102          */
3103         pinfo = pci_alloc_consistent(adapter->pdev, sizeof(mraid_pinfo_t),
3104                         &pinfo_dma_h);
3105
3106         if (pinfo == NULL) {
3107                 con_log(CL_ANN, (KERN_WARNING
3108                         "megaraid: out of memory, %s %d\n", __FUNCTION__,
3109                         __LINE__));
3110
3111                 return -1;
3112         }
3113         memset(pinfo, 0, sizeof(mraid_pinfo_t));
3114
3115         mbox->xferaddr = (uint32_t)adapter->ibuf_dma_h;
3116         memset((void *)adapter->ibuf, 0, MBOX_IBUF_SIZE);
3117
3118         raw_mbox[0] = FC_NEW_CONFIG;
3119         raw_mbox[2] = NC_SUBOP_ENQUIRY3;
3120         raw_mbox[3] = ENQ3_GET_SOLICITED_FULL;
3121
3122         // Issue the command
3123         if (mbox_post_sync_cmd(adapter, raw_mbox) != 0) {
3124
3125                 con_log(CL_ANN, (KERN_WARNING "megaraid: Inquiry3 failed\n"));
3126
3127                 pci_free_consistent(adapter->pdev, sizeof(mraid_pinfo_t),
3128                         pinfo, pinfo_dma_h);
3129
3130                 return -1;
3131         }
3132
3133         /*
3134          * Collect information about state of each physical drive
3135          * attached to the controller. We will expose all the disks
3136          * which are not part of RAID
3137          */
3138         mraid_inq3 = (mraid_inquiry3_t *)adapter->ibuf;
3139         for (i = 0; i < MBOX_MAX_PHYSICAL_DRIVES; i++) {
3140                 raid_dev->pdrv_state[i] = mraid_inq3->pdrv_state[i];
3141         }
3142
3143         /*
3144          * Get product info for information like number of channels,
3145          * maximum commands supported.
3146          */
3147         memset((caddr_t)raw_mbox, 0, sizeof(raw_mbox));
3148         mbox->xferaddr = (uint32_t)pinfo_dma_h;
3149
3150         raw_mbox[0] = FC_NEW_CONFIG;
3151         raw_mbox[2] = NC_SUBOP_PRODUCT_INFO;
3152
3153         if (mbox_post_sync_cmd(adapter, raw_mbox) != 0) {
3154
3155                 con_log(CL_ANN, (KERN_WARNING
3156                         "megaraid: product info failed\n"));
3157
3158                 pci_free_consistent(adapter->pdev, sizeof(mraid_pinfo_t),
3159                         pinfo, pinfo_dma_h);
3160
3161                 return -1;
3162         }
3163
3164         /*
3165          * Setup some parameters for host, as required by our caller
3166          */
3167         adapter->max_channel = pinfo->nchannels;
3168
3169         /*
3170          * we will export all the logical drives on a single channel.
3171          * Add 1 since inquires do not come for inititor ID
3172          */
3173         adapter->max_target     = MAX_LOGICAL_DRIVES_40LD + 1;
3174         adapter->max_lun        = 8;    // up to 8 LUNs for non-disk devices
3175
3176         /*
3177          * These are the maximum outstanding commands for the scsi-layer
3178          */
3179         adapter->max_cmds       = MBOX_MAX_SCSI_CMDS;
3180
3181         memset(adapter->fw_version, 0, VERSION_SIZE);
3182         memset(adapter->bios_version, 0, VERSION_SIZE);
3183
3184         memcpy(adapter->fw_version, pinfo->fw_version, 4);
3185         adapter->fw_version[4] = 0;
3186
3187         memcpy(adapter->bios_version, pinfo->bios_version, 4);
3188         adapter->bios_version[4] = 0;
3189
3190         con_log(CL_ANN, (KERN_NOTICE
3191                 "megaraid: fw version:[%s] bios version:[%s]\n",
3192                 adapter->fw_version, adapter->bios_version));
3193
3194         pci_free_consistent(adapter->pdev, sizeof(mraid_pinfo_t), pinfo,
3195                         pinfo_dma_h);
3196
3197         return 0;
3198 }
3199
3200
3201
3202 /**
3203  * megaraid_mbox_extended_cdb - check for support for extended CDBs
3204  * @adapter     - soft state for the controller
3205  *
3206  * this routine check whether the controller in question supports extended
3207  * ( > 10 bytes ) CDBs
3208  */
3209 static int
3210 megaraid_mbox_extended_cdb(adapter_t *adapter)
3211 {
3212         mbox_t          *mbox;
3213         uint8_t         raw_mbox[sizeof(mbox_t)];
3214         int             rval;
3215
3216         mbox = (mbox_t *)raw_mbox;
3217
3218         memset((caddr_t)raw_mbox, 0, sizeof(raw_mbox));
3219         mbox->xferaddr  = (uint32_t)adapter->ibuf_dma_h;
3220
3221         memset((void *)adapter->ibuf, 0, MBOX_IBUF_SIZE);
3222
3223         raw_mbox[0] = MAIN_MISC_OPCODE;
3224         raw_mbox[2] = SUPPORT_EXT_CDB;
3225
3226         /*
3227          * Issue the command
3228          */
3229         rval = 0;
3230         if (mbox_post_sync_cmd(adapter, raw_mbox) != 0) {
3231                 rval = -1;
3232         }
3233
3234         return rval;
3235 }
3236
3237
3238 /**
3239  * megaraid_mbox_support_ha - Do we support clustering
3240  * @adapter     - soft state for the controller
3241  * @init_id     - ID of the initiator
3242  *
3243  * Determine if the firmware supports clustering and the ID of the initiator.
3244  */
3245 static int
3246 megaraid_mbox_support_ha(adapter_t *adapter, uint16_t *init_id)
3247 {
3248         mbox_t          *mbox;
3249         uint8_t         raw_mbox[sizeof(mbox_t)];
3250         int             rval;
3251
3252
3253         mbox = (mbox_t *)raw_mbox;
3254
3255         memset((caddr_t)raw_mbox, 0, sizeof(raw_mbox));
3256
3257         mbox->xferaddr = (uint32_t)adapter->ibuf_dma_h;
3258
3259         memset((void *)adapter->ibuf, 0, MBOX_IBUF_SIZE);
3260
3261         raw_mbox[0] = GET_TARGET_ID;
3262
3263         // Issue the command
3264         *init_id = 7;
3265         rval =  -1;
3266         if (mbox_post_sync_cmd(adapter, raw_mbox) == 0) {
3267
3268                 *init_id = *(uint8_t *)adapter->ibuf;
3269
3270                 con_log(CL_ANN, (KERN_INFO
3271                         "megaraid: cluster firmware, initiator ID: %d\n",
3272                         *init_id));
3273
3274                 rval =  0;
3275         }
3276
3277         return rval;
3278 }
3279
3280
3281 /**
3282  * megaraid_mbox_support_random_del - Do we support random deletion
3283  * @adapter     - soft state for the controller
3284  *
3285  * Determine if the firmware supports random deletion
3286  * Return:      1 is operation supported, 0 otherwise
3287  */
3288 static int
3289 megaraid_mbox_support_random_del(adapter_t *adapter)
3290 {
3291         mbox_t          *mbox;
3292         uint8_t         raw_mbox[sizeof(mbox_t)];
3293         int             rval;
3294
3295
3296         mbox = (mbox_t *)raw_mbox;
3297
3298         memset((caddr_t)raw_mbox, 0, sizeof(mbox_t));
3299
3300         raw_mbox[0] = FC_DEL_LOGDRV;
3301         raw_mbox[2] = OP_SUP_DEL_LOGDRV;
3302
3303         // Issue the command
3304         rval = 0;
3305         if (mbox_post_sync_cmd(adapter, raw_mbox) == 0) {
3306
3307                 con_log(CL_DLEVEL1, ("megaraid: supports random deletion\n"));
3308
3309                 rval =  1;
3310         }
3311
3312         return rval;
3313 }
3314
3315
3316 /**
3317  * megaraid_mbox_get_max_sg - maximum sg elements supported by the firmware
3318  * @adapter     - soft state for the controller
3319  *
3320  * Find out the maximum number of scatter-gather elements supported by the
3321  * firmware
3322  */
3323 static int
3324 megaraid_mbox_get_max_sg(adapter_t *adapter)
3325 {
3326         mbox_t          *mbox;
3327         uint8_t         raw_mbox[sizeof(mbox_t)];
3328         int             nsg;
3329
3330
3331         mbox = (mbox_t *)raw_mbox;
3332
3333         memset((caddr_t)raw_mbox, 0, sizeof(mbox_t));
3334
3335         mbox->xferaddr = (uint32_t)adapter->ibuf_dma_h;
3336
3337         memset((void *)adapter->ibuf, 0, MBOX_IBUF_SIZE);
3338
3339         raw_mbox[0] = MAIN_MISC_OPCODE;
3340         raw_mbox[2] = GET_MAX_SG_SUPPORT;
3341
3342         // Issue the command
3343         if (mbox_post_sync_cmd(adapter, raw_mbox) == 0) {
3344                 nsg =  *(uint8_t *)adapter->ibuf;
3345         }
3346         else {
3347                 nsg =  MBOX_DEFAULT_SG_SIZE;
3348         }
3349
3350         if (nsg > MBOX_MAX_SG_SIZE) nsg = MBOX_MAX_SG_SIZE;
3351
3352         return nsg;
3353 }
3354
3355
3356 /**
3357  * megaraid_mbox_enum_raid_scsi - enumerate the RAID and SCSI channels
3358  * @adapter     - soft state for the controller
3359  *
3360  * Enumerate the RAID and SCSI channels for ROMB platoforms so that channels
3361  * can be exported as regular SCSI channels
3362  */
3363 static void
3364 megaraid_mbox_enum_raid_scsi(adapter_t *adapter)
3365 {
3366         mraid_device_t  *raid_dev = ADAP2RAIDDEV(adapter);
3367         mbox_t          *mbox;
3368         uint8_t         raw_mbox[sizeof(mbox_t)];
3369
3370
3371         mbox = (mbox_t *)raw_mbox;
3372
3373         memset((caddr_t)raw_mbox, 0, sizeof(mbox_t));
3374
3375         mbox->xferaddr = (uint32_t)adapter->ibuf_dma_h;
3376
3377         memset((void *)adapter->ibuf, 0, MBOX_IBUF_SIZE);
3378
3379         raw_mbox[0] = CHNL_CLASS;
3380         raw_mbox[2] = GET_CHNL_CLASS;
3381
3382         // Issue the command. If the command fails, all channels are RAID
3383         // channels
3384         raid_dev->channel_class = 0xFF;
3385         if (mbox_post_sync_cmd(adapter, raw_mbox) == 0) {
3386                 raid_dev->channel_class =  *(uint8_t *)adapter->ibuf;
3387         }
3388
3389         return;
3390 }
3391
3392
3393 /**
3394  * megaraid_mbox_flush_cache - flush adapter and disks cache
3395  * @param adapter       : soft state for the controller
3396  *
3397  * Flush adapter cache followed by disks cache
3398  */
3399 static void
3400 megaraid_mbox_flush_cache(adapter_t *adapter)
3401 {
3402         mbox_t  *mbox;
3403         uint8_t raw_mbox[sizeof(mbox_t)];
3404
3405
3406         mbox = (mbox_t *)raw_mbox;
3407
3408         memset((caddr_t)raw_mbox, 0, sizeof(mbox_t));
3409
3410         raw_mbox[0] = FLUSH_ADAPTER;
3411
3412         if (mbox_post_sync_cmd(adapter, raw_mbox) != 0) {
3413                 con_log(CL_ANN, ("megaraid: flush adapter failed\n"));
3414         }
3415
3416         raw_mbox[0] = FLUSH_SYSTEM;
3417
3418         if (mbox_post_sync_cmd(adapter, raw_mbox) != 0) {
3419                 con_log(CL_ANN, ("megaraid: flush disks cache failed\n"));
3420         }
3421
3422         return;
3423 }
3424
3425
3426 /**
3427  * megaraid_mbox_display_scb - display SCB information, mostly debug purposes
3428  * @param adapter       : controllers' soft state
3429  * @param scb           : SCB to be displayed
3430  * @param level : debug level for console print
3431  *
3432  * Diplay information about the given SCB iff the current debug level is
3433  * verbose
3434  */
3435 static void
3436 megaraid_mbox_display_scb(adapter_t *adapter, scb_t *scb)
3437 {
3438         mbox_ccb_t              *ccb;
3439         struct scsi_cmnd        *scp;
3440         mbox_t                  *mbox;
3441         int                     level;
3442         int                     i;
3443
3444
3445         ccb     = (mbox_ccb_t *)scb->ccb;
3446         scp     = scb->scp;
3447         mbox    = ccb->mbox;
3448
3449         level = CL_DLEVEL3;
3450
3451         con_log(level, (KERN_NOTICE
3452                 "megaraid mailbox: status:%#x cmd:%#x id:%#x ", scb->status,
3453                 mbox->cmd, scb->sno));
3454
3455         con_log(level, ("sec:%#x lba:%#x addr:%#x ld:%d sg:%d\n",
3456                 mbox->numsectors, mbox->lba, mbox->xferaddr, mbox->logdrv,
3457                 mbox->numsge));
3458
3459         if (!scp) return;
3460
3461         con_log(level, (KERN_NOTICE "scsi cmnd: "));
3462
3463         for (i = 0; i < scp->cmd_len; i++) {
3464                 con_log(level, ("%#2.02x ", scp->cmnd[i]));
3465         }
3466
3467         con_log(level, ("\n"));
3468
3469         return;
3470 }
3471
3472
3473 /**
3474  * megaraid_mbox_setup_device_map - manage device ids
3475  * @adapter     : Driver's soft state
3476  *
3477  * Manange the device ids to have an appropraite mapping between the kernel
3478  * scsi addresses and megaraid scsi and logical drive addresses. We export
3479  * scsi devices on their actual addresses, whereas the logical drives are
3480  * exported on a virtual scsi channel.
3481  **/
3482 static void
3483 megaraid_mbox_setup_device_map(adapter_t *adapter)
3484 {
3485         uint8_t         c;
3486         uint8_t         t;
3487
3488         /*
3489          * First fill the values on the logical drive channel
3490          */
3491         for (t = 0; t < LSI_MAX_LOGICAL_DRIVES_64LD; t++)
3492                 adapter->device_ids[adapter->max_channel][t] =
3493                         (t < adapter->init_id) ?  t : t - 1;
3494
3495         adapter->device_ids[adapter->max_channel][adapter->init_id] = 0xFF;
3496
3497         /*
3498          * Fill the values on the physical devices channels
3499          */
3500         for (c = 0; c < adapter->max_channel; c++)
3501                 for (t = 0; t < LSI_MAX_LOGICAL_DRIVES_64LD; t++)
3502                         adapter->device_ids[c][t] = (c << 8) | t;
3503 }
3504
3505
3506 /*
3507  * END: internal commands library
3508  */
3509
3510 /*
3511  * START: Interface for the common management module
3512  *
3513  * This is the module, which interfaces with the common mangement module to
3514  * provide support for ioctl and sysfs
3515  */
3516
3517 /**
3518  * megaraid_cmm_register - register with the mangement module
3519  * @param adapter       : HBA soft state
3520  *
3521  * Register with the management module, which allows applications to issue
3522  * ioctl calls to the drivers. This interface is used by the management module
3523  * to setup sysfs support as well.
3524  */
3525 static int
3526 megaraid_cmm_register(adapter_t *adapter)
3527 {
3528         mraid_device_t  *raid_dev = ADAP2RAIDDEV(adapter);
3529         mraid_mmadp_t   adp;
3530         scb_t           *scb;
3531         mbox_ccb_t      *ccb;
3532         int             rval;
3533         int             i;
3534
3535         // Allocate memory for the base list of scb for management module.
3536         adapter->uscb_list = kmalloc(sizeof(scb_t) * MBOX_MAX_USER_CMDS,
3537                         GFP_KERNEL);
3538
3539         if (adapter->uscb_list == NULL) {
3540                 con_log(CL_ANN, (KERN_WARNING
3541                         "megaraid: out of memory, %s %d\n", __FUNCTION__,
3542                         __LINE__));
3543                 return -1;
3544         }
3545         memset(adapter->uscb_list, 0, sizeof(scb_t) * MBOX_MAX_USER_CMDS);
3546
3547
3548         // Initialize the synchronization parameters for resources for
3549         // commands for management module
3550         INIT_LIST_HEAD(&adapter->uscb_pool);
3551
3552         spin_lock_init(USER_FREE_LIST_LOCK(adapter));
3553
3554
3555
3556         // link all the packets. Note, CCB for commands, coming from the
3557         // commom management module, mailbox physical address are already
3558         // setup by it. We just need placeholder for that in our local command
3559         // control blocks
3560         for (i = 0; i < MBOX_MAX_USER_CMDS; i++) {
3561
3562                 scb                     = adapter->uscb_list + i;
3563                 ccb                     = raid_dev->uccb_list + i;
3564
3565                 scb->ccb                = (caddr_t)ccb;
3566                 ccb->mbox64             = raid_dev->umbox64 + i;
3567                 ccb->mbox               = &ccb->mbox64->mbox32;
3568                 ccb->raw_mbox           = (uint8_t *)ccb->mbox;
3569
3570                 scb->gp                 = 0;
3571
3572                 // COMMAND ID 0 - (MBOX_MAX_SCSI_CMDS-1) ARE RESERVED FOR
3573                 // COMMANDS COMING FROM IO SUBSYSTEM (MID-LAYER)
3574                 scb->sno                = i + MBOX_MAX_SCSI_CMDS;
3575
3576                 scb->scp                = NULL;
3577                 scb->state              = SCB_FREE;
3578                 scb->dma_direction      = PCI_DMA_NONE;
3579                 scb->dma_type           = MRAID_DMA_NONE;
3580                 scb->dev_channel        = -1;
3581                 scb->dev_target         = -1;
3582
3583                 // put scb in the free pool
3584                 list_add_tail(&scb->list, &adapter->uscb_pool);
3585         }
3586
3587         adp.unique_id           = adapter->unique_id;
3588         adp.drvr_type           = DRVRTYPE_MBOX;
3589         adp.drvr_data           = (unsigned long)adapter;
3590         adp.pdev                = adapter->pdev;
3591         adp.issue_uioc          = megaraid_mbox_mm_handler;
3592         adp.timeout             = 300;
3593         adp.max_kioc            = MBOX_MAX_USER_CMDS;
3594
3595         if ((rval = mraid_mm_register_adp(&adp)) != 0) {
3596
3597                 con_log(CL_ANN, (KERN_WARNING
3598                         "megaraid mbox: did not register with CMM\n"));
3599
3600                 kfree(adapter->uscb_list);
3601         }
3602
3603         return rval;
3604 }
3605
3606
3607 /**
3608  * megaraid_cmm_unregister - un-register with the mangement module
3609  * @param adapter       : HBA soft state
3610  *
3611  * Un-register with the management module.
3612  * FIXME: mgmt module must return failure for unregister if it has pending
3613  * commands in LLD
3614  */
3615 static int
3616 megaraid_cmm_unregister(adapter_t *adapter)
3617 {
3618         kfree(adapter->uscb_list);
3619         mraid_mm_unregister_adp(adapter->unique_id);
3620         return 0;
3621 }
3622
3623
3624 /**
3625  * megaraid_mbox_mm_handler - interface for CMM to issue commands to LLD
3626  * @param drvr_data     : LLD specific data
3627  * @param kioc          : CMM interface packet
3628  * @param action        : command action
3629  *
3630  * This routine is invoked whenever the Common Mangement Module (CMM) has a
3631  * command for us. The 'action' parameter specifies if this is a new command
3632  * or otherwise.
3633  */
3634 static int
3635 megaraid_mbox_mm_handler(unsigned long drvr_data, uioc_t *kioc, uint32_t action)
3636 {
3637         adapter_t *adapter;
3638
3639         if (action != IOCTL_ISSUE) {
3640                 con_log(CL_ANN, (KERN_WARNING
3641                         "megaraid: unsupported management action:%#2x\n",
3642                         action));
3643                 return (-ENOTSUPP);
3644         }
3645
3646         adapter = (adapter_t *)drvr_data;
3647
3648         // make sure this adapter is not being detached right now.
3649         if (atomic_read(&adapter->being_detached)) {
3650                 con_log(CL_ANN, (KERN_WARNING
3651                         "megaraid: reject management request, detaching\n"));
3652                 return (-ENODEV);
3653         }
3654
3655         switch (kioc->opcode) {
3656
3657         case GET_ADAP_INFO:
3658
3659                 kioc->status =  gather_hbainfo(adapter, (mraid_hba_info_t *)
3660                                         (unsigned long)kioc->buf_vaddr);
3661
3662                 kioc->done(kioc);
3663
3664                 return kioc->status;
3665
3666         case MBOX_CMD:
3667
3668                 return megaraid_mbox_mm_command(adapter, kioc);
3669
3670         default:
3671                 kioc->status = (-EINVAL);
3672                 kioc->done(kioc);
3673                 return (-EINVAL);
3674         }
3675
3676         return 0;       // not reached
3677 }
3678
3679 /**
3680  * megaraid_mbox_mm_command - issues commands routed through CMM
3681  * @param adapter       : HBA soft state
3682  * @param kioc          : management command packet
3683  *
3684  * Issues commands, which are routed through the management module.
3685  */
3686 static int
3687 megaraid_mbox_mm_command(adapter_t *adapter, uioc_t *kioc)
3688 {
3689         struct list_head        *head = &adapter->uscb_pool;
3690         mbox64_t                *mbox64;
3691         uint8_t                 *raw_mbox;
3692         scb_t                   *scb;
3693         mbox_ccb_t              *ccb;
3694         unsigned long           flags;
3695
3696         // detach one scb from free pool
3697         spin_lock_irqsave(USER_FREE_LIST_LOCK(adapter), flags);
3698
3699         if (list_empty(head)) { // should never happen because of CMM
3700
3701                 con_log(CL_ANN, (KERN_WARNING
3702                         "megaraid mbox: bug in cmm handler, lost resources\n"));
3703
3704                 spin_unlock_irqrestore(USER_FREE_LIST_LOCK(adapter), flags);
3705
3706                 return (-EINVAL);
3707         }
3708
3709         scb = list_entry(head->next, scb_t, list);
3710         list_del_init(&scb->list);
3711
3712         spin_unlock_irqrestore(USER_FREE_LIST_LOCK(adapter), flags);
3713
3714         scb->state              = SCB_ACTIVE;
3715         scb->dma_type           = MRAID_DMA_NONE;
3716         scb->dma_direction      = PCI_DMA_NONE;
3717
3718         ccb             = (mbox_ccb_t *)scb->ccb;
3719         mbox64          = (mbox64_t *)(unsigned long)kioc->cmdbuf;
3720         raw_mbox        = (uint8_t *)&mbox64->mbox32;
3721
3722         memcpy(ccb->mbox64, mbox64, sizeof(mbox64_t));
3723
3724         scb->gp         = (unsigned long)kioc;
3725
3726         /*
3727          * If it is a logdrv random delete operation, we have to wait till
3728          * there are no outstanding cmds at the fw and then issue it directly
3729          */
3730         if (raw_mbox[0] == FC_DEL_LOGDRV && raw_mbox[2] == OP_DEL_LOGDRV) {
3731
3732                 if (wait_till_fw_empty(adapter)) {
3733                         con_log(CL_ANN, (KERN_NOTICE
3734                                 "megaraid mbox: LD delete, timed out\n"));
3735
3736                         kioc->status = -ETIME;
3737
3738                         scb->status = -1;
3739
3740                         megaraid_mbox_mm_done(adapter, scb);
3741
3742                         return (-ETIME);
3743                 }
3744
3745                 INIT_LIST_HEAD(&scb->list);
3746
3747                 scb->state = SCB_ISSUED;
3748                 if (mbox_post_cmd(adapter, scb) != 0) {
3749
3750                         con_log(CL_ANN, (KERN_NOTICE
3751                                 "megaraid mbox: LD delete, mailbox busy\n"));
3752
3753                         kioc->status = -EBUSY;
3754
3755                         scb->status = -1;
3756
3757                         megaraid_mbox_mm_done(adapter, scb);
3758
3759                         return (-EBUSY);
3760                 }
3761
3762                 return 0;
3763         }
3764
3765         // put the command on the pending list and execute
3766         megaraid_mbox_runpendq(adapter, scb);
3767
3768         return 0;
3769 }
3770
3771
3772 static int
3773 wait_till_fw_empty(adapter_t *adapter)
3774 {
3775         unsigned long   flags = 0;
3776         int             i;
3777
3778
3779         /*
3780          * Set the quiescent flag to stop issuing cmds to FW.
3781          */
3782         spin_lock_irqsave(adapter->host_lock, flags);
3783         adapter->quiescent++;
3784         spin_unlock_irqrestore(adapter->host_lock, flags);
3785
3786         /*
3787          * Wait till there are no more cmds outstanding at FW. Try for at most
3788          * 60 seconds
3789          */
3790         for (i = 0; i < 60 && adapter->outstanding_cmds; i++) {
3791                 con_log(CL_DLEVEL1, (KERN_INFO
3792                         "megaraid: FW has %d pending commands\n",
3793                         adapter->outstanding_cmds));
3794
3795                 msleep(1000);
3796         }
3797
3798         return adapter->outstanding_cmds;
3799 }
3800
3801
3802 /**
3803  * megaraid_mbox_mm_done - callback for CMM commands
3804  * @adapter     : HBA soft state
3805  * @scb         : completed command
3806  *
3807  * Callback routine for internal commands originated from the management
3808  * module.
3809  */
3810 static void
3811 megaraid_mbox_mm_done(adapter_t *adapter, scb_t *scb)
3812 {
3813         uioc_t                  *kioc;
3814         mbox64_t                *mbox64;
3815         uint8_t                 *raw_mbox;
3816         unsigned long           flags;
3817
3818         kioc                    = (uioc_t *)scb->gp;
3819         kioc->status            = 0;
3820         mbox64                  = (mbox64_t *)(unsigned long)kioc->cmdbuf;
3821         mbox64->mbox32.status   = scb->status;
3822         raw_mbox                = (uint8_t *)&mbox64->mbox32;
3823
3824
3825         // put scb in the free pool
3826         scb->state      = SCB_FREE;
3827         scb->scp        = NULL;
3828
3829         spin_lock_irqsave(USER_FREE_LIST_LOCK(adapter), flags);
3830
3831         list_add(&scb->list, &adapter->uscb_pool);
3832
3833         spin_unlock_irqrestore(USER_FREE_LIST_LOCK(adapter), flags);
3834
3835         // if a delete logical drive operation succeeded, restart the
3836         // controller
3837         if (raw_mbox[0] == FC_DEL_LOGDRV && raw_mbox[2] == OP_DEL_LOGDRV) {
3838
3839                 adapter->quiescent--;
3840
3841                 megaraid_mbox_runpendq(adapter, NULL);
3842         }
3843
3844         kioc->done(kioc);
3845
3846         return;
3847 }
3848
3849
3850 /**
3851  * gather_hbainfo - HBA characteristics for the applications
3852  * @param adapter       : HBA soft state
3853  * @param hinfo         : pointer to the caller's host info strucuture
3854  */
3855 static int
3856 gather_hbainfo(adapter_t *adapter, mraid_hba_info_t *hinfo)
3857 {
3858         uint8_t dmajor;
3859
3860         dmajor                  = megaraid_mbox_version[0];
3861
3862         hinfo->pci_vendor_id    = adapter->pdev->vendor;
3863         hinfo->pci_device_id    = adapter->pdev->device;
3864         hinfo->subsys_vendor_id = adapter->pdev->subsystem_vendor;
3865         hinfo->subsys_device_id = adapter->pdev->subsystem_device;
3866
3867         hinfo->pci_bus          = adapter->pdev->bus->number;
3868         hinfo->pci_dev_fn       = adapter->pdev->devfn;
3869         hinfo->pci_slot         = PCI_SLOT(adapter->pdev->devfn);
3870         hinfo->irq              = adapter->host->irq;
3871         hinfo->baseport         = ADAP2RAIDDEV(adapter)->baseport;
3872
3873         hinfo->unique_id        = (hinfo->pci_bus << 8) | adapter->pdev->devfn;
3874         hinfo->host_no          = adapter->host->host_no;
3875
3876         return 0;
3877 }
3878
3879 /*
3880  * END: Interface for the common management module
3881  */
3882
3883
3884
3885 /**
3886  * megaraid_sysfs_alloc_resources - allocate sysfs related resources
3887  *
3888  * Allocate packets required to issue FW calls whenever the sysfs attributes
3889  * are read. These attributes would require up-to-date information from the
3890  * FW. Also set up resources for mutual exclusion to share these resources and
3891  * the wait queue.
3892  *
3893  * @param adapter : controller's soft state
3894  *
3895  * @return 0 on success
3896  * @return -ERROR_CODE on failure
3897  */
3898 static int
3899 megaraid_sysfs_alloc_resources(adapter_t *adapter)
3900 {
3901         mraid_device_t  *raid_dev = ADAP2RAIDDEV(adapter);
3902         int             rval = 0;
3903
3904         raid_dev->sysfs_uioc = kmalloc(sizeof(uioc_t), GFP_KERNEL);
3905
3906         raid_dev->sysfs_mbox64 = kmalloc(sizeof(mbox64_t), GFP_KERNEL);
3907
3908         raid_dev->sysfs_buffer = pci_alloc_consistent(adapter->pdev,
3909                         PAGE_SIZE, &raid_dev->sysfs_buffer_dma);
3910
3911         if (!raid_dev->sysfs_uioc || !raid_dev->sysfs_mbox64 ||
3912                 !raid_dev->sysfs_buffer) {
3913
3914                 con_log(CL_ANN, (KERN_WARNING
3915                         "megaraid: out of memory, %s %d\n", __FUNCTION__,
3916                         __LINE__));
3917
3918                 rval = -ENOMEM;
3919
3920                 megaraid_sysfs_free_resources(adapter);
3921         }
3922
3923         sema_init(&raid_dev->sysfs_sem, 1);
3924
3925         init_waitqueue_head(&raid_dev->sysfs_wait_q);
3926
3927         return rval;
3928 }
3929
3930
3931 /**
3932  * megaraid_sysfs_free_resources - free sysfs related resources
3933  *
3934  * Free packets allocated for sysfs FW commands
3935  *
3936  * @param adapter : controller's soft state
3937  */
3938 static void
3939 megaraid_sysfs_free_resources(adapter_t *adapter)
3940 {
3941         mraid_device_t  *raid_dev = ADAP2RAIDDEV(adapter);
3942
3943         if (raid_dev->sysfs_uioc) kfree(raid_dev->sysfs_uioc);
3944
3945         if (raid_dev->sysfs_mbox64) kfree(raid_dev->sysfs_mbox64);
3946
3947         if (raid_dev->sysfs_buffer) {
3948                 pci_free_consistent(adapter->pdev, PAGE_SIZE,
3949                         raid_dev->sysfs_buffer, raid_dev->sysfs_buffer_dma);
3950         }
3951 }
3952
3953
3954 /**
3955  * megaraid_sysfs_get_ldmap_done - callback for get ldmap
3956  *
3957  * Callback routine called in the ISR/tasklet context for get ldmap call
3958  *
3959  * @param uioc : completed packet
3960  */
3961 static void
3962 megaraid_sysfs_get_ldmap_done(uioc_t *uioc)
3963 {
3964         adapter_t       *adapter = (adapter_t *)uioc->buf_vaddr;
3965         mraid_device_t  *raid_dev = ADAP2RAIDDEV(adapter);
3966
3967         uioc->status = 0;
3968
3969         wake_up(&raid_dev->sysfs_wait_q);
3970 }
3971
3972
3973 /**
3974  * megaraid_sysfs_get_ldmap_timeout - timeout handling for get ldmap
3975  *
3976  * Timeout routine to recover and return to application, in case the adapter
3977  * has stopped responding. A timeout of 60 seconds for this command seem like
3978  * a good value
3979  *
3980  * @param uioc : timed out packet
3981  */
3982 static void
3983 megaraid_sysfs_get_ldmap_timeout(unsigned long data)
3984 {
3985         uioc_t          *uioc = (uioc_t *)data;
3986         adapter_t       *adapter = (adapter_t *)uioc->buf_vaddr;
3987         mraid_device_t  *raid_dev = ADAP2RAIDDEV(adapter);
3988
3989         uioc->status = -ETIME;
3990
3991         wake_up(&raid_dev->sysfs_wait_q);
3992 }
3993
3994
3995 /**
3996  * megaraid_sysfs_get_ldmap - get update logical drive map
3997  *
3998  * This routine will be called whenever user reads the logical drive
3999  * attributes, go get the current logical drive mapping table from the
4000  * firmware. We use the managment API's to issue commands to the controller.
4001  *
4002  * NOTE: The commands issuance functionality is not generalized and
4003  * implemented in context of "get ld map" command only. If required, the
4004  * command issuance logical can be trivially pulled out and implemented as a
4005  * standalone libary. For now, this should suffice since there is no other
4006  * user of this interface.
4007  *
4008  * @param adapter : controller's soft state
4009  *
4010  * @return 0 on success
4011  * @return -1 on failure
4012  */
4013 static int
4014 megaraid_sysfs_get_ldmap(adapter_t *adapter)
4015 {
4016         mraid_device_t          *raid_dev = ADAP2RAIDDEV(adapter);
4017         uioc_t                  *uioc;
4018         mbox64_t                *mbox64;
4019         mbox_t                  *mbox;
4020         char                    *raw_mbox;
4021         struct timer_list       sysfs_timer;
4022         struct timer_list       *timerp;
4023         caddr_t                 ldmap;
4024         int                     rval = 0;
4025
4026         /*
4027          * Allow only one read at a time to go through the sysfs attributes
4028          */
4029         down(&raid_dev->sysfs_sem);
4030
4031         uioc    = raid_dev->sysfs_uioc;
4032         mbox64  = raid_dev->sysfs_mbox64;
4033         ldmap   = raid_dev->sysfs_buffer;
4034
4035         memset(uioc, 0, sizeof(uioc_t));
4036         memset(mbox64, 0, sizeof(mbox64_t));
4037         memset(ldmap, 0, sizeof(raid_dev->curr_ldmap));
4038
4039         mbox            = &mbox64->mbox32;
4040         raw_mbox        = (char *)mbox;
4041         uioc->cmdbuf    = (uint64_t)(unsigned long)mbox64;
4042         uioc->buf_vaddr = (caddr_t)adapter;
4043         uioc->status    = -ENODATA;
4044         uioc->done      = megaraid_sysfs_get_ldmap_done;
4045
4046         /*
4047          * Prepare the mailbox packet to get the current logical drive mapping
4048          * table
4049          */
4050         mbox->xferaddr = (uint32_t)raid_dev->sysfs_buffer_dma;
4051
4052         raw_mbox[0] = FC_DEL_LOGDRV;
4053         raw_mbox[2] = OP_GET_LDID_MAP;
4054
4055         /*
4056          * Setup a timer to recover from a non-responding controller
4057          */
4058         timerp  = &sysfs_timer;
4059         init_timer(timerp);
4060
4061         timerp->function        = megaraid_sysfs_get_ldmap_timeout;
4062         timerp->data            = (unsigned long)uioc;
4063         timerp->expires         = jiffies + 60 * HZ;
4064
4065         add_timer(timerp);
4066
4067         /*
4068          * Send the command to the firmware
4069          */
4070         rval = megaraid_mbox_mm_command(adapter, uioc);
4071
4072         if (rval == 0) {        // command successfully issued
4073                 wait_event(raid_dev->sysfs_wait_q, (uioc->status != -ENODATA));
4074
4075                 /*
4076                  * Check if the command timed out
4077                  */
4078                 if (uioc->status == -ETIME) {
4079                         con_log(CL_ANN, (KERN_NOTICE
4080                                 "megaraid: sysfs get ld map timed out\n"));
4081
4082                         rval = -ETIME;
4083                 }
4084                 else {
4085                         rval = mbox->status;
4086                 }
4087
4088                 if (rval == 0) {
4089                         memcpy(raid_dev->curr_ldmap, ldmap,
4090                                 sizeof(raid_dev->curr_ldmap));
4091                 }
4092                 else {
4093                         con_log(CL_ANN, (KERN_NOTICE
4094                                 "megaraid: get ld map failed with %x\n", rval));
4095                 }
4096         }
4097         else {
4098                 con_log(CL_ANN, (KERN_NOTICE
4099                         "megaraid: could not issue ldmap command:%x\n", rval));
4100         }
4101
4102
4103         del_timer_sync(timerp);
4104
4105         up(&raid_dev->sysfs_sem);
4106
4107         return rval;
4108 }
4109
4110
4111 /**
4112  * megaraid_sysfs_show_app_hndl - display application handle for this adapter
4113  *
4114  * Display the handle used by the applications while executing management
4115  * tasks on the adapter. We invoke a management module API to get the adapter
4116  * handle, since we do not interface with applications directly.
4117  *
4118  * @param cdev  : class device object representation for the host
4119  * @param buf   : buffer to send data to
4120  */
4121 static ssize_t
4122 megaraid_sysfs_show_app_hndl(struct class_device *cdev, char *buf)
4123 {
4124         struct Scsi_Host *shost = class_to_shost(cdev);
4125         adapter_t       *adapter = (adapter_t *)SCSIHOST2ADAP(shost);
4126         uint32_t        app_hndl;
4127
4128         app_hndl = mraid_mm_adapter_app_handle(adapter->unique_id);
4129
4130         return snprintf(buf, 8, "%u\n", app_hndl);
4131 }
4132
4133
4134 /**
4135  * megaraid_sysfs_show_ldnum - display the logical drive number for this device
4136  *
4137  * Display the logical drive number for the device in question, if it a valid
4138  * logical drive. For physical devices, "-1" is returned
4139  * The logical drive number is displayed in following format
4140  *
4141  * <SCSI ID> <LD NUM> <LD STICKY ID> <APP ADAPTER HANDLE>
4142  *   <int>     <int>       <int>            <int>
4143  *
4144  * @param dev   : device object representation for the scsi device
4145  * @param buf   : buffer to send data to
4146  */
4147 static ssize_t
4148 megaraid_sysfs_show_ldnum(struct device *dev, struct device_attribute *attr, char *buf)
4149 {
4150         struct scsi_device *sdev = to_scsi_device(dev);
4151         adapter_t       *adapter = (adapter_t *)SCSIHOST2ADAP(sdev->host);
4152         mraid_device_t  *raid_dev = ADAP2RAIDDEV(adapter);
4153         int             scsi_id = -1;
4154         int             logical_drv = -1;
4155         int             ldid_map = -1;
4156         uint32_t        app_hndl = 0;
4157         int             mapped_sdev_id;
4158         int             rval;
4159         int             i;
4160
4161         if (raid_dev->random_del_supported &&
4162                         MRAID_IS_LOGICAL_SDEV(adapter, sdev)) {
4163
4164                 rval = megaraid_sysfs_get_ldmap(adapter);
4165                 if (rval == 0) {
4166
4167                         for (i = 0; i < MAX_LOGICAL_DRIVES_40LD; i++) {
4168
4169                                 mapped_sdev_id = sdev->id;
4170
4171                                 if (sdev->id > adapter->init_id) {
4172                                         mapped_sdev_id -= 1;
4173                                 }
4174
4175                                 if (raid_dev->curr_ldmap[i] == mapped_sdev_id) {
4176
4177                                         scsi_id = sdev->id;
4178
4179                                         logical_drv = i;
4180
4181                                         ldid_map = raid_dev->curr_ldmap[i];
4182
4183                                         app_hndl = mraid_mm_adapter_app_handle(
4184                                                         adapter->unique_id);
4185
4186                                         break;
4187                                 }
4188                         }
4189                 }
4190                 else {
4191                         con_log(CL_ANN, (KERN_NOTICE
4192                                 "megaraid: sysfs get ld map failed: %x\n",
4193                                 rval));
4194                 }
4195         }
4196
4197         return snprintf(buf, 36, "%d %d %d %d\n", scsi_id, logical_drv,
4198                         ldid_map, app_hndl);
4199 }
4200
4201
4202 /*
4203  * END: Mailbox Low Level Driver
4204  */
4205 module_init(megaraid_init);
4206 module_exit(megaraid_exit);
4207
4208 /* vim: set ts=8 sw=8 tw=78 ai si: */