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   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 *, 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
2703 /**
2704  * megaraid_reset_handler - device reset hadler for mailbox based driver
2705  * @scp         : reference command
2706  *
2707  * Reset handler for the mailbox based controller. First try to find out if
2708  * the FW is still live, in which case the outstanding commands counter mut go
2709  * down to 0. If that happens, also issue the reservation reset command to
2710  * relinquish (possible) reservations on the logical drives connected to this
2711  * host
2712  **/
2713 static int
2714 megaraid_reset_handler(struct scsi_cmnd *scp)
2715 {
2716         adapter_t       *adapter;
2717         scb_t           *scb;
2718         scb_t           *tmp;
2719         mraid_device_t  *raid_dev;
2720         unsigned long   flags;
2721         uint8_t         raw_mbox[sizeof(mbox_t)];
2722         int             rval;
2723         int             recovery_window;
2724         int             recovering;
2725         int             i;
2726
2727         adapter         = SCP2ADAPTER(scp);
2728         raid_dev        = ADAP2RAIDDEV(adapter);
2729
2730         assert_spin_locked(adapter->host_lock);
2731
2732         con_log(CL_ANN, (KERN_WARNING "megaraid: reseting the host...\n"));
2733
2734         // return failure if adapter is not responding
2735         if (raid_dev->hw_error) {
2736                 con_log(CL_ANN, (KERN_NOTICE
2737                         "megaraid: hw error, cannot reset\n"));
2738                 return FAILED;
2739         }
2740
2741
2742         // Under exceptional conditions, FW can take up to 3 minutes to
2743         // complete command processing. Wait for additional 2 minutes for the
2744         // pending commands counter to go down to 0. If it doesn't, let the
2745         // controller be marked offline
2746         // Also, reset all the commands currently owned by the driver
2747         spin_lock_irqsave(PENDING_LIST_LOCK(adapter), flags);
2748         list_for_each_entry_safe(scb, tmp, &adapter->pend_list, list) {
2749
2750                 list_del_init(&scb->list);      // from pending list
2751
2752                 con_log(CL_ANN, (KERN_WARNING
2753                         "megaraid: %ld:%d[%d:%d], reset from pending list\n",
2754                                 scp->serial_number, scb->sno,
2755                                 scb->dev_channel, scb->dev_target));
2756
2757                 scp->result = (DID_RESET << 16);
2758                 scp->scsi_done(scp);
2759
2760                 megaraid_dealloc_scb(adapter, scb);
2761         }
2762         spin_unlock_irqrestore(PENDING_LIST_LOCK(adapter), flags);
2763
2764         if (adapter->outstanding_cmds) {
2765                 con_log(CL_ANN, (KERN_NOTICE
2766                         "megaraid: %d outstanding commands. Max wait %d sec\n",
2767                         adapter->outstanding_cmds, MBOX_RESET_WAIT));
2768         }
2769
2770         spin_unlock(adapter->host_lock);
2771
2772         recovery_window = MBOX_RESET_WAIT + MBOX_RESET_EXT_WAIT;
2773
2774         recovering = adapter->outstanding_cmds;
2775
2776         for (i = 0; i < recovery_window && adapter->outstanding_cmds; i++) {
2777
2778                 megaraid_ack_sequence(adapter);
2779
2780                 // print a message once every 5 seconds only
2781                 if (!(i % 5)) {
2782                         con_log(CL_ANN, (
2783                         "megaraid mbox: Wait for %d commands to complete:%d\n",
2784                                 adapter->outstanding_cmds,
2785                                 MBOX_RESET_WAIT - i));
2786                 }
2787
2788                 // bailout if no recovery happended in reset time
2789                 if ((i == MBOX_RESET_WAIT) &&
2790                         (recovering == adapter->outstanding_cmds)) {
2791                         break;
2792                 }
2793
2794                 msleep(1000);
2795         }
2796
2797         spin_lock(adapter->host_lock);
2798
2799         // If still outstanding commands, bail out
2800         if (adapter->outstanding_cmds) {
2801                 con_log(CL_ANN, (KERN_WARNING
2802                         "megaraid mbox: critical hardware error!\n"));
2803
2804                 raid_dev->hw_error = 1;
2805
2806                 return FAILED;
2807         }
2808         else {
2809                 con_log(CL_ANN, (KERN_NOTICE
2810                 "megaraid mbox: reset sequence completed sucessfully\n"));
2811         }
2812
2813
2814         // If the controller supports clustering, reset reservations
2815         if (!adapter->ha) return SUCCESS;
2816
2817         // clear reservations if any
2818         raw_mbox[0] = CLUSTER_CMD;
2819         raw_mbox[2] = RESET_RESERVATIONS;
2820
2821         rval = SUCCESS;
2822         if (mbox_post_sync_cmd_fast(adapter, raw_mbox) == 0) {
2823                 con_log(CL_ANN,
2824                         (KERN_INFO "megaraid: reservation reset\n"));
2825         }
2826         else {
2827                 rval = FAILED;
2828                 con_log(CL_ANN, (KERN_WARNING
2829                                 "megaraid: reservation reset failed\n"));
2830         }
2831
2832         return rval;
2833 }
2834
2835
2836 /*
2837  * START: internal commands library
2838  *
2839  * This section of the driver has the common routine used by the driver and
2840  * also has all the FW routines
2841  */
2842
2843 /**
2844  * mbox_post_sync_cmd() - blocking command to the mailbox based controllers
2845  * @adapter     - controller's soft state
2846  * @raw_mbox    - the mailbox
2847  *
2848  * Issue a scb in synchronous and non-interrupt mode for mailbox based
2849  * controllers
2850  */
2851 static int
2852 mbox_post_sync_cmd(adapter_t *adapter, uint8_t raw_mbox[])
2853 {
2854         mraid_device_t  *raid_dev = ADAP2RAIDDEV(adapter);
2855         mbox64_t        *mbox64;
2856         mbox_t          *mbox;
2857         uint8_t         status;
2858         int             i;
2859
2860
2861         mbox64  = raid_dev->mbox64;
2862         mbox    = raid_dev->mbox;
2863
2864         /*
2865          * Wait until mailbox is free
2866          */
2867         if (megaraid_busywait_mbox(raid_dev) != 0)
2868                 goto blocked_mailbox;
2869
2870         /*
2871          * Copy mailbox data into host structure
2872          */
2873         memcpy((caddr_t)mbox, (caddr_t)raw_mbox, 16);
2874         mbox->cmdid             = 0xFE;
2875         mbox->busy              = 1;
2876         mbox->poll              = 0;
2877         mbox->ack               = 0;
2878         mbox->numstatus         = 0xFF;
2879         mbox->status            = 0xFF;
2880
2881         wmb();
2882         WRINDOOR(raid_dev, raid_dev->mbox_dma | 0x1);
2883
2884         // wait for maximum 1 second for status to post. If the status is not
2885         // available within 1 second, assume FW is initializing and wait
2886         // for an extended amount of time
2887         if (mbox->numstatus == 0xFF) {  // status not yet available
2888                 udelay(25);;
2889
2890                 for (i = 0; mbox->numstatus == 0xFF && i < 1000; i++) {
2891                         rmb();
2892                         msleep(1);
2893                 }
2894
2895
2896                 if (i == 1000) {
2897                         con_log(CL_ANN, (KERN_NOTICE
2898                                 "megaraid mailbox: wait for FW to boot      "));
2899
2900                         for (i = 0; (mbox->numstatus == 0xFF) &&
2901                                         (i < MBOX_RESET_WAIT); i++) {
2902                                 rmb();
2903                                 con_log(CL_ANN, ("\b\b\b\b\b[%03d]",
2904                                                         MBOX_RESET_WAIT - i));
2905                                 msleep(1000);
2906                         }
2907
2908                         if (i == MBOX_RESET_WAIT) {
2909
2910                                 con_log(CL_ANN, (
2911                                 "\nmegaraid mailbox: status not available\n"));
2912
2913                                 return -1;
2914                         }
2915                         con_log(CL_ANN, ("\b\b\b\b\b[ok] \n"));
2916                 }
2917         }
2918
2919         // wait for maximum 1 second for poll semaphore
2920         if (mbox->poll != 0x77) {
2921                 udelay(25);
2922
2923                 for (i = 0; (mbox->poll != 0x77) && (i < 1000); i++) {
2924                         rmb();
2925                         msleep(1);
2926                 }
2927
2928                 if (i == 1000) {
2929                         con_log(CL_ANN, (KERN_WARNING
2930                         "megaraid mailbox: could not get poll semaphore\n"));
2931                         return -1;
2932                 }
2933         }
2934
2935         WRINDOOR(raid_dev, raid_dev->mbox_dma | 0x2);
2936         wmb();
2937
2938         // wait for maximum 1 second for acknowledgement
2939         if (RDINDOOR(raid_dev) & 0x2) {
2940                 udelay(25);
2941
2942                 for (i = 0; (RDINDOOR(raid_dev) & 0x2) && (i < 1000); i++) {
2943                         rmb();
2944                         msleep(1);
2945                 }
2946
2947                 if (i == 1000) {
2948                         con_log(CL_ANN, (KERN_WARNING
2949                                 "megaraid mailbox: could not acknowledge\n"));
2950                         return -1;
2951                 }
2952         }
2953         mbox->poll      = 0;
2954         mbox->ack       = 0x77;
2955
2956         status = mbox->status;
2957
2958         // invalidate the completed command id array. After command
2959         // completion, firmware would write the valid id.
2960         mbox->numstatus = 0xFF;
2961         mbox->status    = 0xFF;
2962         for (i = 0; i < MBOX_MAX_FIRMWARE_STATUS; i++) {
2963                 mbox->completed[i] = 0xFF;
2964         }
2965
2966         return status;
2967
2968 blocked_mailbox:
2969
2970         con_log(CL_ANN, (KERN_WARNING "megaraid: blocked mailbox\n") );
2971         return -1;
2972 }
2973
2974
2975 /**
2976  * mbox_post_sync_cmd_fast - blocking command to the mailbox based controllers
2977  * @adapter     - controller's soft state
2978  * @raw_mbox    - the mailbox
2979  *
2980  * Issue a scb in synchronous and non-interrupt mode for mailbox based
2981  * controllers. This is a faster version of the synchronous command and
2982  * therefore can be called in interrupt-context as well
2983  */
2984 static int
2985 mbox_post_sync_cmd_fast(adapter_t *adapter, uint8_t raw_mbox[])
2986 {
2987         mraid_device_t  *raid_dev = ADAP2RAIDDEV(adapter);
2988         mbox_t          *mbox;
2989         long            i;
2990
2991
2992         mbox    = raid_dev->mbox;
2993
2994         // return immediately if the mailbox is busy
2995         if (mbox->busy) return -1;
2996
2997         // Copy mailbox data into host structure
2998         memcpy((caddr_t)mbox, (caddr_t)raw_mbox, 14);
2999         mbox->cmdid             = 0xFE;
3000         mbox->busy              = 1;
3001         mbox->poll              = 0;
3002         mbox->ack               = 0;
3003         mbox->numstatus         = 0xFF;
3004         mbox->status            = 0xFF;
3005
3006         wmb();
3007         WRINDOOR(raid_dev, raid_dev->mbox_dma | 0x1);
3008
3009         for (i = 0; i < 0xFFFFF; i++) {
3010                 if (mbox->numstatus != 0xFF) break;
3011         }
3012
3013         if (i == 0xFFFFF) {
3014                 // We may need to re-calibrate the counter
3015                 con_log(CL_ANN, (KERN_CRIT
3016                         "megaraid: fast sync command timed out\n"));
3017         }
3018
3019         WRINDOOR(raid_dev, raid_dev->mbox_dma | 0x2);
3020         wmb();
3021
3022         return mbox->status;
3023 }
3024
3025
3026 /**
3027  * megaraid_busywait_mbox() - Wait until the controller's mailbox is available
3028  * @raid_dev    - RAID device (HBA) soft state
3029  *
3030  * wait until the controller's mailbox is available to accept more commands.
3031  * wait for at most 1 second
3032  */
3033 static int
3034 megaraid_busywait_mbox(mraid_device_t *raid_dev)
3035 {
3036         mbox_t  *mbox = raid_dev->mbox;
3037         int     i = 0;
3038
3039         if (mbox->busy) {
3040                 udelay(25);
3041                 for (i = 0; mbox->busy && i < 1000; i++)
3042                         msleep(1);
3043         }
3044
3045         if (i < 1000) return 0;
3046         else return -1;
3047 }
3048
3049
3050 /**
3051  * megaraid_mbox_product_info - some static information about the controller
3052  * @adapter     - our soft state
3053  *
3054  * issue commands to the controller to grab some parameters required by our
3055  * caller.
3056  */
3057 static int
3058 megaraid_mbox_product_info(adapter_t *adapter)
3059 {
3060         mraid_device_t          *raid_dev = ADAP2RAIDDEV(adapter);
3061         mbox_t                  *mbox;
3062         uint8_t                 raw_mbox[sizeof(mbox_t)];
3063         mraid_pinfo_t           *pinfo;
3064         dma_addr_t              pinfo_dma_h;
3065         mraid_inquiry3_t        *mraid_inq3;
3066         int                     i;
3067
3068
3069         memset((caddr_t)raw_mbox, 0, sizeof(raw_mbox));
3070         mbox = (mbox_t *)raw_mbox;
3071
3072         /*
3073          * Issue an ENQUIRY3 command to find out certain adapter parameters,
3074          * e.g., max channels, max commands etc.
3075          */
3076         pinfo = pci_alloc_consistent(adapter->pdev, sizeof(mraid_pinfo_t),
3077                         &pinfo_dma_h);
3078
3079         if (pinfo == NULL) {
3080                 con_log(CL_ANN, (KERN_WARNING
3081                         "megaraid: out of memory, %s %d\n", __FUNCTION__,
3082                         __LINE__));
3083
3084                 return -1;
3085         }
3086         memset(pinfo, 0, sizeof(mraid_pinfo_t));
3087
3088         mbox->xferaddr = (uint32_t)adapter->ibuf_dma_h;
3089         memset((void *)adapter->ibuf, 0, MBOX_IBUF_SIZE);
3090
3091         raw_mbox[0] = FC_NEW_CONFIG;
3092         raw_mbox[2] = NC_SUBOP_ENQUIRY3;
3093         raw_mbox[3] = ENQ3_GET_SOLICITED_FULL;
3094
3095         // Issue the command
3096         if (mbox_post_sync_cmd(adapter, raw_mbox) != 0) {
3097
3098                 con_log(CL_ANN, (KERN_WARNING "megaraid: Inquiry3 failed\n"));
3099
3100                 pci_free_consistent(adapter->pdev, sizeof(mraid_pinfo_t),
3101                         pinfo, pinfo_dma_h);
3102
3103                 return -1;
3104         }
3105
3106         /*
3107          * Collect information about state of each physical drive
3108          * attached to the controller. We will expose all the disks
3109          * which are not part of RAID
3110          */
3111         mraid_inq3 = (mraid_inquiry3_t *)adapter->ibuf;
3112         for (i = 0; i < MBOX_MAX_PHYSICAL_DRIVES; i++) {
3113                 raid_dev->pdrv_state[i] = mraid_inq3->pdrv_state[i];
3114         }
3115
3116         /*
3117          * Get product info for information like number of channels,
3118          * maximum commands supported.
3119          */
3120         memset((caddr_t)raw_mbox, 0, sizeof(raw_mbox));
3121         mbox->xferaddr = (uint32_t)pinfo_dma_h;
3122
3123         raw_mbox[0] = FC_NEW_CONFIG;
3124         raw_mbox[2] = NC_SUBOP_PRODUCT_INFO;
3125
3126         if (mbox_post_sync_cmd(adapter, raw_mbox) != 0) {
3127
3128                 con_log(CL_ANN, (KERN_WARNING
3129                         "megaraid: product info failed\n"));
3130
3131                 pci_free_consistent(adapter->pdev, sizeof(mraid_pinfo_t),
3132                         pinfo, pinfo_dma_h);
3133
3134                 return -1;
3135         }
3136
3137         /*
3138          * Setup some parameters for host, as required by our caller
3139          */
3140         adapter->max_channel = pinfo->nchannels;
3141
3142         /*
3143          * we will export all the logical drives on a single channel.
3144          * Add 1 since inquires do not come for inititor ID
3145          */
3146         adapter->max_target     = MAX_LOGICAL_DRIVES_40LD + 1;
3147         adapter->max_lun        = 8;    // up to 8 LUNs for non-disk devices
3148
3149         /*
3150          * These are the maximum outstanding commands for the scsi-layer
3151          */
3152         adapter->max_cmds       = MBOX_MAX_SCSI_CMDS;
3153
3154         memset(adapter->fw_version, 0, VERSION_SIZE);
3155         memset(adapter->bios_version, 0, VERSION_SIZE);
3156
3157         memcpy(adapter->fw_version, pinfo->fw_version, 4);
3158         adapter->fw_version[4] = 0;
3159
3160         memcpy(adapter->bios_version, pinfo->bios_version, 4);
3161         adapter->bios_version[4] = 0;
3162
3163         con_log(CL_ANN, (KERN_NOTICE
3164                 "megaraid: fw version:[%s] bios version:[%s]\n",
3165                 adapter->fw_version, adapter->bios_version));
3166
3167         pci_free_consistent(adapter->pdev, sizeof(mraid_pinfo_t), pinfo,
3168                         pinfo_dma_h);
3169
3170         return 0;
3171 }
3172
3173
3174
3175 /**
3176  * megaraid_mbox_extended_cdb - check for support for extended CDBs
3177  * @adapter     - soft state for the controller
3178  *
3179  * this routine check whether the controller in question supports extended
3180  * ( > 10 bytes ) CDBs
3181  */
3182 static int
3183 megaraid_mbox_extended_cdb(adapter_t *adapter)
3184 {
3185         mbox_t          *mbox;
3186         uint8_t         raw_mbox[sizeof(mbox_t)];
3187         int             rval;
3188
3189         mbox = (mbox_t *)raw_mbox;
3190
3191         memset((caddr_t)raw_mbox, 0, sizeof(raw_mbox));
3192         mbox->xferaddr  = (uint32_t)adapter->ibuf_dma_h;
3193
3194         memset((void *)adapter->ibuf, 0, MBOX_IBUF_SIZE);
3195
3196         raw_mbox[0] = MAIN_MISC_OPCODE;
3197         raw_mbox[2] = SUPPORT_EXT_CDB;
3198
3199         /*
3200          * Issue the command
3201          */
3202         rval = 0;
3203         if (mbox_post_sync_cmd(adapter, raw_mbox) != 0) {
3204                 rval = -1;
3205         }
3206
3207         return rval;
3208 }
3209
3210
3211 /**
3212  * megaraid_mbox_support_ha - Do we support clustering
3213  * @adapter     - soft state for the controller
3214  * @init_id     - ID of the initiator
3215  *
3216  * Determine if the firmware supports clustering and the ID of the initiator.
3217  */
3218 static int
3219 megaraid_mbox_support_ha(adapter_t *adapter, uint16_t *init_id)
3220 {
3221         mbox_t          *mbox;
3222         uint8_t         raw_mbox[sizeof(mbox_t)];
3223         int             rval;
3224
3225
3226         mbox = (mbox_t *)raw_mbox;
3227
3228         memset((caddr_t)raw_mbox, 0, sizeof(raw_mbox));
3229
3230         mbox->xferaddr = (uint32_t)adapter->ibuf_dma_h;
3231
3232         memset((void *)adapter->ibuf, 0, MBOX_IBUF_SIZE);
3233
3234         raw_mbox[0] = GET_TARGET_ID;
3235
3236         // Issue the command
3237         *init_id = 7;
3238         rval =  -1;
3239         if (mbox_post_sync_cmd(adapter, raw_mbox) == 0) {
3240
3241                 *init_id = *(uint8_t *)adapter->ibuf;
3242
3243                 con_log(CL_ANN, (KERN_INFO
3244                         "megaraid: cluster firmware, initiator ID: %d\n",
3245                         *init_id));
3246
3247                 rval =  0;
3248         }
3249
3250         return rval;
3251 }
3252
3253
3254 /**
3255  * megaraid_mbox_support_random_del - Do we support random deletion
3256  * @adapter     - soft state for the controller
3257  *
3258  * Determine if the firmware supports random deletion
3259  * Return:      1 is operation supported, 0 otherwise
3260  */
3261 static int
3262 megaraid_mbox_support_random_del(adapter_t *adapter)
3263 {
3264         mbox_t          *mbox;
3265         uint8_t         raw_mbox[sizeof(mbox_t)];
3266         int             rval;
3267
3268
3269         mbox = (mbox_t *)raw_mbox;
3270
3271         memset((caddr_t)raw_mbox, 0, sizeof(mbox_t));
3272
3273         raw_mbox[0] = FC_DEL_LOGDRV;
3274         raw_mbox[2] = OP_SUP_DEL_LOGDRV;
3275
3276         // Issue the command
3277         rval = 0;
3278         if (mbox_post_sync_cmd(adapter, raw_mbox) == 0) {
3279
3280                 con_log(CL_DLEVEL1, ("megaraid: supports random deletion\n"));
3281
3282                 rval =  1;
3283         }
3284
3285         return rval;
3286 }
3287
3288
3289 /**
3290  * megaraid_mbox_get_max_sg - maximum sg elements supported by the firmware
3291  * @adapter     - soft state for the controller
3292  *
3293  * Find out the maximum number of scatter-gather elements supported by the
3294  * firmware
3295  */
3296 static int
3297 megaraid_mbox_get_max_sg(adapter_t *adapter)
3298 {
3299         mbox_t          *mbox;
3300         uint8_t         raw_mbox[sizeof(mbox_t)];
3301         int             nsg;
3302
3303
3304         mbox = (mbox_t *)raw_mbox;
3305
3306         memset((caddr_t)raw_mbox, 0, sizeof(mbox_t));
3307
3308         mbox->xferaddr = (uint32_t)adapter->ibuf_dma_h;
3309
3310         memset((void *)adapter->ibuf, 0, MBOX_IBUF_SIZE);
3311
3312         raw_mbox[0] = MAIN_MISC_OPCODE;
3313         raw_mbox[2] = GET_MAX_SG_SUPPORT;
3314
3315         // Issue the command
3316         if (mbox_post_sync_cmd(adapter, raw_mbox) == 0) {
3317                 nsg =  *(uint8_t *)adapter->ibuf;
3318         }
3319         else {
3320                 nsg =  MBOX_DEFAULT_SG_SIZE;
3321         }
3322
3323         if (nsg > MBOX_MAX_SG_SIZE) nsg = MBOX_MAX_SG_SIZE;
3324
3325         return nsg;
3326 }
3327
3328
3329 /**
3330  * megaraid_mbox_enum_raid_scsi - enumerate the RAID and SCSI channels
3331  * @adapter     - soft state for the controller
3332  *
3333  * Enumerate the RAID and SCSI channels for ROMB platoforms so that channels
3334  * can be exported as regular SCSI channels
3335  */
3336 static void
3337 megaraid_mbox_enum_raid_scsi(adapter_t *adapter)
3338 {
3339         mraid_device_t  *raid_dev = ADAP2RAIDDEV(adapter);
3340         mbox_t          *mbox;
3341         uint8_t         raw_mbox[sizeof(mbox_t)];
3342
3343
3344         mbox = (mbox_t *)raw_mbox;
3345
3346         memset((caddr_t)raw_mbox, 0, sizeof(mbox_t));
3347
3348         mbox->xferaddr = (uint32_t)adapter->ibuf_dma_h;
3349
3350         memset((void *)adapter->ibuf, 0, MBOX_IBUF_SIZE);
3351
3352         raw_mbox[0] = CHNL_CLASS;
3353         raw_mbox[2] = GET_CHNL_CLASS;
3354
3355         // Issue the command. If the command fails, all channels are RAID
3356         // channels
3357         raid_dev->channel_class = 0xFF;
3358         if (mbox_post_sync_cmd(adapter, raw_mbox) == 0) {
3359                 raid_dev->channel_class =  *(uint8_t *)adapter->ibuf;
3360         }
3361
3362         return;
3363 }
3364
3365
3366 /**
3367  * megaraid_mbox_flush_cache - flush adapter and disks cache
3368  * @param adapter       : soft state for the controller
3369  *
3370  * Flush adapter cache followed by disks cache
3371  */
3372 static void
3373 megaraid_mbox_flush_cache(adapter_t *adapter)
3374 {
3375         mbox_t  *mbox;
3376         uint8_t raw_mbox[sizeof(mbox_t)];
3377
3378
3379         mbox = (mbox_t *)raw_mbox;
3380
3381         memset((caddr_t)raw_mbox, 0, sizeof(mbox_t));
3382
3383         raw_mbox[0] = FLUSH_ADAPTER;
3384
3385         if (mbox_post_sync_cmd(adapter, raw_mbox) != 0) {
3386                 con_log(CL_ANN, ("megaraid: flush adapter failed\n"));
3387         }
3388
3389         raw_mbox[0] = FLUSH_SYSTEM;
3390
3391         if (mbox_post_sync_cmd(adapter, raw_mbox) != 0) {
3392                 con_log(CL_ANN, ("megaraid: flush disks cache failed\n"));
3393         }
3394
3395         return;
3396 }
3397
3398
3399 /**
3400  * megaraid_mbox_display_scb - display SCB information, mostly debug purposes
3401  * @param adapter       : controllers' soft state
3402  * @param scb           : SCB to be displayed
3403  * @param level : debug level for console print
3404  *
3405  * Diplay information about the given SCB iff the current debug level is
3406  * verbose
3407  */
3408 static void
3409 megaraid_mbox_display_scb(adapter_t *adapter, scb_t *scb)
3410 {
3411         mbox_ccb_t              *ccb;
3412         struct scsi_cmnd        *scp;
3413         mbox_t                  *mbox;
3414         int                     level;
3415         int                     i;
3416
3417
3418         ccb     = (mbox_ccb_t *)scb->ccb;
3419         scp     = scb->scp;
3420         mbox    = ccb->mbox;
3421
3422         level = CL_DLEVEL3;
3423
3424         con_log(level, (KERN_NOTICE
3425                 "megaraid mailbox: status:%#x cmd:%#x id:%#x ", scb->status,
3426                 mbox->cmd, scb->sno));
3427
3428         con_log(level, ("sec:%#x lba:%#x addr:%#x ld:%d sg:%d\n",
3429                 mbox->numsectors, mbox->lba, mbox->xferaddr, mbox->logdrv,
3430                 mbox->numsge));
3431
3432         if (!scp) return;
3433
3434         con_log(level, (KERN_NOTICE "scsi cmnd: "));
3435
3436         for (i = 0; i < scp->cmd_len; i++) {
3437                 con_log(level, ("%#2.02x ", scp->cmnd[i]));
3438         }
3439
3440         con_log(level, ("\n"));
3441
3442         return;
3443 }
3444
3445
3446 /**
3447  * megaraid_mbox_setup_device_map - manage device ids
3448  * @adapter     : Driver's soft state
3449  *
3450  * Manange the device ids to have an appropraite mapping between the kernel
3451  * scsi addresses and megaraid scsi and logical drive addresses. We export
3452  * scsi devices on their actual addresses, whereas the logical drives are
3453  * exported on a virtual scsi channel.
3454  **/
3455 static void
3456 megaraid_mbox_setup_device_map(adapter_t *adapter)
3457 {
3458         uint8_t         c;
3459         uint8_t         t;
3460
3461         /*
3462          * First fill the values on the logical drive channel
3463          */
3464         for (t = 0; t < LSI_MAX_LOGICAL_DRIVES_64LD; t++)
3465                 adapter->device_ids[adapter->max_channel][t] =
3466                         (t < adapter->init_id) ?  t : t - 1;
3467
3468         adapter->device_ids[adapter->max_channel][adapter->init_id] = 0xFF;
3469
3470         /*
3471          * Fill the values on the physical devices channels
3472          */
3473         for (c = 0; c < adapter->max_channel; c++)
3474                 for (t = 0; t < LSI_MAX_LOGICAL_DRIVES_64LD; t++)
3475                         adapter->device_ids[c][t] = (c << 8) | t;
3476 }
3477
3478
3479 /*
3480  * END: internal commands library
3481  */
3482
3483 /*
3484  * START: Interface for the common management module
3485  *
3486  * This is the module, which interfaces with the common mangement module to
3487  * provide support for ioctl and sysfs
3488  */
3489
3490 /**
3491  * megaraid_cmm_register - register with the mangement module
3492  * @param adapter       : HBA soft state
3493  *
3494  * Register with the management module, which allows applications to issue
3495  * ioctl calls to the drivers. This interface is used by the management module
3496  * to setup sysfs support as well.
3497  */
3498 static int
3499 megaraid_cmm_register(adapter_t *adapter)
3500 {
3501         mraid_device_t  *raid_dev = ADAP2RAIDDEV(adapter);
3502         mraid_mmadp_t   adp;
3503         scb_t           *scb;
3504         mbox_ccb_t      *ccb;
3505         int             rval;
3506         int             i;
3507
3508         // Allocate memory for the base list of scb for management module.
3509         adapter->uscb_list = kmalloc(sizeof(scb_t) * MBOX_MAX_USER_CMDS,
3510                         GFP_KERNEL);
3511
3512         if (adapter->uscb_list == NULL) {
3513                 con_log(CL_ANN, (KERN_WARNING
3514                         "megaraid: out of memory, %s %d\n", __FUNCTION__,
3515                         __LINE__));
3516                 return -1;
3517         }
3518         memset(adapter->uscb_list, 0, sizeof(scb_t) * MBOX_MAX_USER_CMDS);
3519
3520
3521         // Initialize the synchronization parameters for resources for
3522         // commands for management module
3523         INIT_LIST_HEAD(&adapter->uscb_pool);
3524
3525         spin_lock_init(USER_FREE_LIST_LOCK(adapter));
3526
3527
3528
3529         // link all the packets. Note, CCB for commands, coming from the
3530         // commom management module, mailbox physical address are already
3531         // setup by it. We just need placeholder for that in our local command
3532         // control blocks
3533         for (i = 0; i < MBOX_MAX_USER_CMDS; i++) {
3534
3535                 scb                     = adapter->uscb_list + i;
3536                 ccb                     = raid_dev->uccb_list + i;
3537
3538                 scb->ccb                = (caddr_t)ccb;
3539                 ccb->mbox64             = raid_dev->umbox64 + i;
3540                 ccb->mbox               = &ccb->mbox64->mbox32;
3541                 ccb->raw_mbox           = (uint8_t *)ccb->mbox;
3542
3543                 scb->gp                 = 0;
3544
3545                 // COMMAND ID 0 - (MBOX_MAX_SCSI_CMDS-1) ARE RESERVED FOR
3546                 // COMMANDS COMING FROM IO SUBSYSTEM (MID-LAYER)
3547                 scb->sno                = i + MBOX_MAX_SCSI_CMDS;
3548
3549                 scb->scp                = NULL;
3550                 scb->state              = SCB_FREE;
3551                 scb->dma_direction      = PCI_DMA_NONE;
3552                 scb->dma_type           = MRAID_DMA_NONE;
3553                 scb->dev_channel        = -1;
3554                 scb->dev_target         = -1;
3555
3556                 // put scb in the free pool
3557                 list_add_tail(&scb->list, &adapter->uscb_pool);
3558         }
3559
3560         adp.unique_id           = adapter->unique_id;
3561         adp.drvr_type           = DRVRTYPE_MBOX;
3562         adp.drvr_data           = (unsigned long)adapter;
3563         adp.pdev                = adapter->pdev;
3564         adp.issue_uioc          = megaraid_mbox_mm_handler;
3565         adp.timeout             = 300;
3566         adp.max_kioc            = MBOX_MAX_USER_CMDS;
3567
3568         if ((rval = mraid_mm_register_adp(&adp)) != 0) {
3569
3570                 con_log(CL_ANN, (KERN_WARNING
3571                         "megaraid mbox: did not register with CMM\n"));
3572
3573                 kfree(adapter->uscb_list);
3574         }
3575
3576         return rval;
3577 }
3578
3579
3580 /**
3581  * megaraid_cmm_unregister - un-register with the mangement module
3582  * @param adapter       : HBA soft state
3583  *
3584  * Un-register with the management module.
3585  * FIXME: mgmt module must return failure for unregister if it has pending
3586  * commands in LLD
3587  */
3588 static int
3589 megaraid_cmm_unregister(adapter_t *adapter)
3590 {
3591         kfree(adapter->uscb_list);
3592         mraid_mm_unregister_adp(adapter->unique_id);
3593         return 0;
3594 }
3595
3596
3597 /**
3598  * megaraid_mbox_mm_handler - interface for CMM to issue commands to LLD
3599  * @param drvr_data     : LLD specific data
3600  * @param kioc          : CMM interface packet
3601  * @param action        : command action
3602  *
3603  * This routine is invoked whenever the Common Mangement Module (CMM) has a
3604  * command for us. The 'action' parameter specifies if this is a new command
3605  * or otherwise.
3606  */
3607 static int
3608 megaraid_mbox_mm_handler(unsigned long drvr_data, uioc_t *kioc, uint32_t action)
3609 {
3610         adapter_t *adapter;
3611
3612         if (action != IOCTL_ISSUE) {
3613                 con_log(CL_ANN, (KERN_WARNING
3614                         "megaraid: unsupported management action:%#2x\n",
3615                         action));
3616                 return (-ENOTSUPP);
3617         }
3618
3619         adapter = (adapter_t *)drvr_data;
3620
3621         // make sure this adapter is not being detached right now.
3622         if (atomic_read(&adapter->being_detached)) {
3623                 con_log(CL_ANN, (KERN_WARNING
3624                         "megaraid: reject management request, detaching\n"));
3625                 return (-ENODEV);
3626         }
3627
3628         switch (kioc->opcode) {
3629
3630         case GET_ADAP_INFO:
3631
3632                 kioc->status =  gather_hbainfo(adapter, (mraid_hba_info_t *)
3633                                         (unsigned long)kioc->buf_vaddr);
3634
3635                 kioc->done(kioc);
3636
3637                 return kioc->status;
3638
3639         case MBOX_CMD:
3640
3641                 return megaraid_mbox_mm_command(adapter, kioc);
3642
3643         default:
3644                 kioc->status = (-EINVAL);
3645                 kioc->done(kioc);
3646                 return (-EINVAL);
3647         }
3648
3649         return 0;       // not reached
3650 }
3651
3652 /**
3653  * megaraid_mbox_mm_command - issues commands routed through CMM
3654  * @param adapter       : HBA soft state
3655  * @param kioc          : management command packet
3656  *
3657  * Issues commands, which are routed through the management module.
3658  */
3659 static int
3660 megaraid_mbox_mm_command(adapter_t *adapter, uioc_t *kioc)
3661 {
3662         struct list_head        *head = &adapter->uscb_pool;
3663         mbox64_t                *mbox64;
3664         uint8_t                 *raw_mbox;
3665         scb_t                   *scb;
3666         mbox_ccb_t              *ccb;
3667         unsigned long           flags;
3668
3669         // detach one scb from free pool
3670         spin_lock_irqsave(USER_FREE_LIST_LOCK(adapter), flags);
3671
3672         if (list_empty(head)) { // should never happen because of CMM
3673
3674                 con_log(CL_ANN, (KERN_WARNING
3675                         "megaraid mbox: bug in cmm handler, lost resources\n"));
3676
3677                 spin_unlock_irqrestore(USER_FREE_LIST_LOCK(adapter), flags);
3678
3679                 return (-EINVAL);
3680         }
3681
3682         scb = list_entry(head->next, scb_t, list);
3683         list_del_init(&scb->list);
3684
3685         spin_unlock_irqrestore(USER_FREE_LIST_LOCK(adapter), flags);
3686
3687         scb->state              = SCB_ACTIVE;
3688         scb->dma_type           = MRAID_DMA_NONE;
3689         scb->dma_direction      = PCI_DMA_NONE;
3690
3691         ccb             = (mbox_ccb_t *)scb->ccb;
3692         mbox64          = (mbox64_t *)(unsigned long)kioc->cmdbuf;
3693         raw_mbox        = (uint8_t *)&mbox64->mbox32;
3694
3695         memcpy(ccb->mbox64, mbox64, sizeof(mbox64_t));
3696
3697         scb->gp         = (unsigned long)kioc;
3698
3699         /*
3700          * If it is a logdrv random delete operation, we have to wait till
3701          * there are no outstanding cmds at the fw and then issue it directly
3702          */
3703         if (raw_mbox[0] == FC_DEL_LOGDRV && raw_mbox[2] == OP_DEL_LOGDRV) {
3704
3705                 if (wait_till_fw_empty(adapter)) {
3706                         con_log(CL_ANN, (KERN_NOTICE
3707                                 "megaraid mbox: LD delete, timed out\n"));
3708
3709                         kioc->status = -ETIME;
3710
3711                         scb->status = -1;
3712
3713                         megaraid_mbox_mm_done(adapter, scb);
3714
3715                         return (-ETIME);
3716                 }
3717
3718                 INIT_LIST_HEAD(&scb->list);
3719
3720                 scb->state = SCB_ISSUED;
3721                 if (mbox_post_cmd(adapter, scb) != 0) {
3722
3723                         con_log(CL_ANN, (KERN_NOTICE
3724                                 "megaraid mbox: LD delete, mailbox busy\n"));
3725
3726                         kioc->status = -EBUSY;
3727
3728                         scb->status = -1;
3729
3730                         megaraid_mbox_mm_done(adapter, scb);
3731
3732                         return (-EBUSY);
3733                 }
3734
3735                 return 0;
3736         }
3737
3738         // put the command on the pending list and execute
3739         megaraid_mbox_runpendq(adapter, scb);
3740
3741         return 0;
3742 }
3743
3744
3745 static int
3746 wait_till_fw_empty(adapter_t *adapter)
3747 {
3748         unsigned long   flags = 0;
3749         int             i;
3750
3751
3752         /*
3753          * Set the quiescent flag to stop issuing cmds to FW.
3754          */
3755         spin_lock_irqsave(adapter->host_lock, flags);
3756         adapter->quiescent++;
3757         spin_unlock_irqrestore(adapter->host_lock, flags);
3758
3759         /*
3760          * Wait till there are no more cmds outstanding at FW. Try for at most
3761          * 60 seconds
3762          */
3763         for (i = 0; i < 60 && adapter->outstanding_cmds; i++) {
3764                 con_log(CL_DLEVEL1, (KERN_INFO
3765                         "megaraid: FW has %d pending commands\n",
3766                         adapter->outstanding_cmds));
3767
3768                 msleep(1000);
3769         }
3770
3771         return adapter->outstanding_cmds;
3772 }
3773
3774
3775 /**
3776  * megaraid_mbox_mm_done - callback for CMM commands
3777  * @adapter     : HBA soft state
3778  * @scb         : completed command
3779  *
3780  * Callback routine for internal commands originated from the management
3781  * module.
3782  */
3783 static void
3784 megaraid_mbox_mm_done(adapter_t *adapter, scb_t *scb)
3785 {
3786         uioc_t                  *kioc;
3787         mbox64_t                *mbox64;
3788         uint8_t                 *raw_mbox;
3789         unsigned long           flags;
3790
3791         kioc                    = (uioc_t *)scb->gp;
3792         kioc->status            = 0;
3793         mbox64                  = (mbox64_t *)(unsigned long)kioc->cmdbuf;
3794         mbox64->mbox32.status   = scb->status;
3795         raw_mbox                = (uint8_t *)&mbox64->mbox32;
3796
3797
3798         // put scb in the free pool
3799         scb->state      = SCB_FREE;
3800         scb->scp        = NULL;
3801
3802         spin_lock_irqsave(USER_FREE_LIST_LOCK(adapter), flags);
3803
3804         list_add(&scb->list, &adapter->uscb_pool);
3805
3806         spin_unlock_irqrestore(USER_FREE_LIST_LOCK(adapter), flags);
3807
3808         // if a delete logical drive operation succeeded, restart the
3809         // controller
3810         if (raw_mbox[0] == FC_DEL_LOGDRV && raw_mbox[2] == OP_DEL_LOGDRV) {
3811
3812                 adapter->quiescent--;
3813
3814                 megaraid_mbox_runpendq(adapter, NULL);
3815         }
3816
3817         kioc->done(kioc);
3818
3819         return;
3820 }
3821
3822
3823 /**
3824  * gather_hbainfo - HBA characteristics for the applications
3825  * @param adapter       : HBA soft state
3826  * @param hinfo         : pointer to the caller's host info strucuture
3827  */
3828 static int
3829 gather_hbainfo(adapter_t *adapter, mraid_hba_info_t *hinfo)
3830 {
3831         uint8_t dmajor;
3832
3833         dmajor                  = megaraid_mbox_version[0];
3834
3835         hinfo->pci_vendor_id    = adapter->pdev->vendor;
3836         hinfo->pci_device_id    = adapter->pdev->device;
3837         hinfo->subsys_vendor_id = adapter->pdev->subsystem_vendor;
3838         hinfo->subsys_device_id = adapter->pdev->subsystem_device;
3839
3840         hinfo->pci_bus          = adapter->pdev->bus->number;
3841         hinfo->pci_dev_fn       = adapter->pdev->devfn;
3842         hinfo->pci_slot         = PCI_SLOT(adapter->pdev->devfn);
3843         hinfo->irq              = adapter->host->irq;
3844         hinfo->baseport         = ADAP2RAIDDEV(adapter)->baseport;
3845
3846         hinfo->unique_id        = (hinfo->pci_bus << 8) | adapter->pdev->devfn;
3847         hinfo->host_no          = adapter->host->host_no;
3848
3849         return 0;
3850 }
3851
3852 /*
3853  * END: Interface for the common management module
3854  */
3855
3856
3857
3858 /**
3859  * megaraid_sysfs_alloc_resources - allocate sysfs related resources
3860  *
3861  * Allocate packets required to issue FW calls whenever the sysfs attributes
3862  * are read. These attributes would require up-to-date information from the
3863  * FW. Also set up resources for mutual exclusion to share these resources and
3864  * the wait queue.
3865  *
3866  * @param adapter : controller's soft state
3867  *
3868  * @return 0 on success
3869  * @return -ERROR_CODE on failure
3870  */
3871 static int
3872 megaraid_sysfs_alloc_resources(adapter_t *adapter)
3873 {
3874         mraid_device_t  *raid_dev = ADAP2RAIDDEV(adapter);
3875         int             rval = 0;
3876
3877         raid_dev->sysfs_uioc = kmalloc(sizeof(uioc_t), GFP_KERNEL);
3878
3879         raid_dev->sysfs_mbox64 = kmalloc(sizeof(mbox64_t), GFP_KERNEL);
3880
3881         raid_dev->sysfs_buffer = pci_alloc_consistent(adapter->pdev,
3882                         PAGE_SIZE, &raid_dev->sysfs_buffer_dma);
3883
3884         if (!raid_dev->sysfs_uioc || !raid_dev->sysfs_mbox64 ||
3885                 !raid_dev->sysfs_buffer) {
3886
3887                 con_log(CL_ANN, (KERN_WARNING
3888                         "megaraid: out of memory, %s %d\n", __FUNCTION__,
3889                         __LINE__));
3890
3891                 rval = -ENOMEM;
3892
3893                 megaraid_sysfs_free_resources(adapter);
3894         }
3895
3896         sema_init(&raid_dev->sysfs_sem, 1);
3897
3898         init_waitqueue_head(&raid_dev->sysfs_wait_q);
3899
3900         return rval;
3901 }
3902
3903
3904 /**
3905  * megaraid_sysfs_free_resources - free sysfs related resources
3906  *
3907  * Free packets allocated for sysfs FW commands
3908  *
3909  * @param adapter : controller's soft state
3910  */
3911 static void
3912 megaraid_sysfs_free_resources(adapter_t *adapter)
3913 {
3914         mraid_device_t  *raid_dev = ADAP2RAIDDEV(adapter);
3915
3916         if (raid_dev->sysfs_uioc) kfree(raid_dev->sysfs_uioc);
3917
3918         if (raid_dev->sysfs_mbox64) kfree(raid_dev->sysfs_mbox64);
3919
3920         if (raid_dev->sysfs_buffer) {
3921                 pci_free_consistent(adapter->pdev, PAGE_SIZE,
3922                         raid_dev->sysfs_buffer, raid_dev->sysfs_buffer_dma);
3923         }
3924 }
3925
3926
3927 /**
3928  * megaraid_sysfs_get_ldmap_done - callback for get ldmap
3929  *
3930  * Callback routine called in the ISR/tasklet context for get ldmap call
3931  *
3932  * @param uioc : completed packet
3933  */
3934 static void
3935 megaraid_sysfs_get_ldmap_done(uioc_t *uioc)
3936 {
3937         adapter_t       *adapter = (adapter_t *)uioc->buf_vaddr;
3938         mraid_device_t  *raid_dev = ADAP2RAIDDEV(adapter);
3939
3940         uioc->status = 0;
3941
3942         wake_up(&raid_dev->sysfs_wait_q);
3943 }
3944
3945
3946 /**
3947  * megaraid_sysfs_get_ldmap_timeout - timeout handling for get ldmap
3948  *
3949  * Timeout routine to recover and return to application, in case the adapter
3950  * has stopped responding. A timeout of 60 seconds for this command seem like
3951  * a good value
3952  *
3953  * @param uioc : timed out packet
3954  */
3955 static void
3956 megaraid_sysfs_get_ldmap_timeout(unsigned long data)
3957 {
3958         uioc_t          *uioc = (uioc_t *)data;
3959         adapter_t       *adapter = (adapter_t *)uioc->buf_vaddr;
3960         mraid_device_t  *raid_dev = ADAP2RAIDDEV(adapter);
3961
3962         uioc->status = -ETIME;
3963
3964         wake_up(&raid_dev->sysfs_wait_q);
3965 }
3966
3967
3968 /**
3969  * megaraid_sysfs_get_ldmap - get update logical drive map
3970  *
3971  * This routine will be called whenever user reads the logical drive
3972  * attributes, go get the current logical drive mapping table from the
3973  * firmware. We use the managment API's to issue commands to the controller.
3974  *
3975  * NOTE: The commands issuance functionality is not generalized and
3976  * implemented in context of "get ld map" command only. If required, the
3977  * command issuance logical can be trivially pulled out and implemented as a
3978  * standalone libary. For now, this should suffice since there is no other
3979  * user of this interface.
3980  *
3981  * @param adapter : controller's soft state
3982  *
3983  * @return 0 on success
3984  * @return -1 on failure
3985  */
3986 static int
3987 megaraid_sysfs_get_ldmap(adapter_t *adapter)
3988 {
3989         mraid_device_t          *raid_dev = ADAP2RAIDDEV(adapter);
3990         uioc_t                  *uioc;
3991         mbox64_t                *mbox64;
3992         mbox_t                  *mbox;
3993         char                    *raw_mbox;
3994         struct timer_list       sysfs_timer;
3995         struct timer_list       *timerp;
3996         caddr_t                 ldmap;
3997         int                     rval = 0;
3998
3999         /*
4000          * Allow only one read at a time to go through the sysfs attributes
4001          */
4002         down(&raid_dev->sysfs_sem);
4003
4004         uioc    = raid_dev->sysfs_uioc;
4005         mbox64  = raid_dev->sysfs_mbox64;
4006         ldmap   = raid_dev->sysfs_buffer;
4007
4008         memset(uioc, 0, sizeof(uioc_t));
4009         memset(mbox64, 0, sizeof(mbox64_t));
4010         memset(ldmap, 0, sizeof(raid_dev->curr_ldmap));
4011
4012         mbox            = &mbox64->mbox32;
4013         raw_mbox        = (char *)mbox;
4014         uioc->cmdbuf    = (uint64_t)(unsigned long)mbox64;
4015         uioc->buf_vaddr = (caddr_t)adapter;
4016         uioc->status    = -ENODATA;
4017         uioc->done      = megaraid_sysfs_get_ldmap_done;
4018
4019         /*
4020          * Prepare the mailbox packet to get the current logical drive mapping
4021          * table
4022          */
4023         mbox->xferaddr = (uint32_t)raid_dev->sysfs_buffer_dma;
4024
4025         raw_mbox[0] = FC_DEL_LOGDRV;
4026         raw_mbox[2] = OP_GET_LDID_MAP;
4027
4028         /*
4029          * Setup a timer to recover from a non-responding controller
4030          */
4031         timerp  = &sysfs_timer;
4032         init_timer(timerp);
4033
4034         timerp->function        = megaraid_sysfs_get_ldmap_timeout;
4035         timerp->data            = (unsigned long)uioc;
4036         timerp->expires         = jiffies + 60 * HZ;
4037
4038         add_timer(timerp);
4039
4040         /*
4041          * Send the command to the firmware
4042          */
4043         rval = megaraid_mbox_mm_command(adapter, uioc);
4044
4045         if (rval == 0) {        // command successfully issued
4046                 wait_event(raid_dev->sysfs_wait_q, (uioc->status != -ENODATA));
4047
4048                 /*
4049                  * Check if the command timed out
4050                  */
4051                 if (uioc->status == -ETIME) {
4052                         con_log(CL_ANN, (KERN_NOTICE
4053                                 "megaraid: sysfs get ld map timed out\n"));
4054
4055                         rval = -ETIME;
4056                 }
4057                 else {
4058                         rval = mbox->status;
4059                 }
4060
4061                 if (rval == 0) {
4062                         memcpy(raid_dev->curr_ldmap, ldmap,
4063                                 sizeof(raid_dev->curr_ldmap));
4064                 }
4065                 else {
4066                         con_log(CL_ANN, (KERN_NOTICE
4067                                 "megaraid: get ld map failed with %x\n", rval));
4068                 }
4069         }
4070         else {
4071                 con_log(CL_ANN, (KERN_NOTICE
4072                         "megaraid: could not issue ldmap command:%x\n", rval));
4073         }
4074
4075
4076         del_timer_sync(timerp);
4077
4078         up(&raid_dev->sysfs_sem);
4079
4080         return rval;
4081 }
4082
4083
4084 /**
4085  * megaraid_sysfs_show_app_hndl - display application handle for this adapter
4086  *
4087  * Display the handle used by the applications while executing management
4088  * tasks on the adapter. We invoke a management module API to get the adapter
4089  * handle, since we do not interface with applications directly.
4090  *
4091  * @param cdev  : class device object representation for the host
4092  * @param buf   : buffer to send data to
4093  */
4094 static ssize_t
4095 megaraid_sysfs_show_app_hndl(struct class_device *cdev, char *buf)
4096 {
4097         struct Scsi_Host *shost = class_to_shost(cdev);
4098         adapter_t       *adapter = (adapter_t *)SCSIHOST2ADAP(shost);
4099         uint32_t        app_hndl;
4100
4101         app_hndl = mraid_mm_adapter_app_handle(adapter->unique_id);
4102
4103         return snprintf(buf, 8, "%u\n", app_hndl);
4104 }
4105
4106
4107 /**
4108  * megaraid_sysfs_show_ldnum - display the logical drive number for this device
4109  *
4110  * Display the logical drive number for the device in question, if it a valid
4111  * logical drive. For physical devices, "-1" is returned
4112  * The logical drive number is displayed in following format
4113  *
4114  * <SCSI ID> <LD NUM> <LD STICKY ID> <APP ADAPTER HANDLE>
4115  *   <int>     <int>       <int>            <int>
4116  *
4117  * @param dev   : device object representation for the scsi device
4118  * @param buf   : buffer to send data to
4119  */
4120 static ssize_t
4121 megaraid_sysfs_show_ldnum(struct device *dev, char *buf)
4122 {
4123         struct scsi_device *sdev = to_scsi_device(dev);
4124         adapter_t       *adapter = (adapter_t *)SCSIHOST2ADAP(sdev->host);
4125         mraid_device_t  *raid_dev = ADAP2RAIDDEV(adapter);
4126         int             scsi_id = -1;
4127         int             logical_drv = -1;
4128         int             ldid_map = -1;
4129         uint32_t        app_hndl = 0;
4130         int             mapped_sdev_id;
4131         int             rval;
4132         int             i;
4133
4134         if (raid_dev->random_del_supported &&
4135                         MRAID_IS_LOGICAL_SDEV(adapter, sdev)) {
4136
4137                 rval = megaraid_sysfs_get_ldmap(adapter);
4138                 if (rval == 0) {
4139
4140                         for (i = 0; i < MAX_LOGICAL_DRIVES_40LD; i++) {
4141
4142                                 mapped_sdev_id = sdev->id;
4143
4144                                 if (sdev->id > adapter->init_id) {
4145                                         mapped_sdev_id -= 1;
4146                                 }
4147
4148                                 if (raid_dev->curr_ldmap[i] == mapped_sdev_id) {
4149
4150                                         scsi_id = sdev->id;
4151
4152                                         logical_drv = i;
4153
4154                                         ldid_map = raid_dev->curr_ldmap[i];
4155
4156                                         app_hndl = mraid_mm_adapter_app_handle(
4157                                                         adapter->unique_id);
4158
4159                                         break;
4160                                 }
4161                         }
4162                 }
4163                 else {
4164                         con_log(CL_ANN, (KERN_NOTICE
4165                                 "megaraid: sysfs get ld map failed: %x\n",
4166                                 rval));
4167                 }
4168         }
4169
4170         return snprintf(buf, 36, "%d %d %d %d\n", scsi_id, logical_drv,
4171                         ldid_map, app_hndl);
4172 }
4173
4174
4175 /*
4176  * END: Mailbox Low Level Driver
4177  */
4178 module_init(megaraid_init);
4179 module_exit(megaraid_exit);
4180
4181 /* vim: set ts=8 sw=8 tw=78 ai si: */