1 /* 2 * 3 * Linux MegaRAID device driver 4 * 5 * Copyright (c) 2003-2004 LSI Logic Corporation. 6 * 7 * This program is free software; you can redistribute it and/or 8 * modify it under the terms of the GNU General Public License 9 * as published by the Free Software Foundation; either version 10 * 2 of the License, or (at your option) any later version. 11 * 12 * FILE : megaraid_mbox.c 13 * Version : v2.20.5.1 (Nov 16 2006) 14 * 15 * Authors: 16 * Atul Mukker <Atul.Mukker@lsi.com> 17 * Sreenivas Bagalkote <Sreenivas.Bagalkote@lsi.com> 18 * Manoj Jose <Manoj.Jose@lsi.com> 19 * Seokmann Ju 20 * 21 * List of supported controllers 22 * 23 * OEM Product Name VID DID SSVID SSID 24 * --- ------------ --- --- ---- ---- 25 * Dell PERC3/QC 101E 1960 1028 0471 26 * Dell PERC3/DC 101E 1960 1028 0493 27 * Dell PERC3/SC 101E 1960 1028 0475 28 * Dell PERC3/Di 1028 1960 1028 0123 29 * Dell PERC4/SC 1000 1960 1028 0520 30 * Dell PERC4/DC 1000 1960 1028 0518 31 * Dell PERC4/QC 1000 0407 1028 0531 32 * Dell PERC4/Di 1028 000F 1028 014A 33 * Dell PERC 4e/Si 1028 0013 1028 016c 34 * Dell PERC 4e/Di 1028 0013 1028 016d 35 * Dell PERC 4e/Di 1028 0013 1028 016e 36 * Dell PERC 4e/Di 1028 0013 1028 016f 37 * Dell PERC 4e/Di 1028 0013 1028 0170 38 * Dell PERC 4e/DC 1000 0408 1028 0002 39 * Dell PERC 4e/SC 1000 0408 1028 0001 40 * 41 * 42 * LSI MegaRAID SCSI 320-0 1000 1960 1000 A520 43 * LSI MegaRAID SCSI 320-1 1000 1960 1000 0520 44 * LSI MegaRAID SCSI 320-2 1000 1960 1000 0518 45 * LSI MegaRAID SCSI 320-0X 1000 0407 1000 0530 46 * LSI MegaRAID SCSI 320-2X 1000 0407 1000 0532 47 * LSI MegaRAID SCSI 320-4X 1000 0407 1000 0531 48 * LSI MegaRAID SCSI 320-1E 1000 0408 1000 0001 49 * LSI MegaRAID SCSI 320-2E 1000 0408 1000 0002 50 * LSI MegaRAID SATA 150-4 1000 1960 1000 4523 51 * LSI MegaRAID SATA 150-6 1000 1960 1000 0523 52 * LSI MegaRAID SATA 300-4X 1000 0409 1000 3004 53 * LSI MegaRAID SATA 300-8X 1000 0409 1000 3008 54 * 55 * INTEL RAID Controller SRCU42X 1000 0407 8086 0532 56 * INTEL RAID Controller SRCS16 1000 1960 8086 0523 57 * INTEL RAID Controller SRCU42E 1000 0408 8086 0002 58 * INTEL RAID Controller SRCZCRX 1000 0407 8086 0530 59 * INTEL RAID Controller SRCS28X 1000 0409 8086 3008 60 * INTEL RAID Controller SROMBU42E 1000 0408 8086 3431 61 * INTEL RAID Controller SROMBU42E 1000 0408 8086 3499 62 * INTEL RAID Controller SRCU51L 1000 1960 8086 0520 63 * 64 * FSC MegaRAID PCI Express ROMB 1000 0408 1734 1065 65 * 66 * ACER MegaRAID ROMB-2E 1000 0408 1025 004D 67 * 68 * NEC MegaRAID PCI Express ROMB 1000 0408 1033 8287 69 * 70 * For history of changes, see Documentation/scsi/ChangeLog.megaraid 71 */ 72 73 #include <linux/slab.h> 74 #include <linux/module.h> 75 #include "megaraid_mbox.h" 76 77 static int megaraid_init(void); 78 static void megaraid_exit(void); 79 80 static int megaraid_probe_one(struct pci_dev*, const struct pci_device_id *); 81 static void megaraid_detach_one(struct pci_dev *); 82 static void megaraid_mbox_shutdown(struct pci_dev *); 83 84 static int megaraid_io_attach(adapter_t *); 85 static void megaraid_io_detach(adapter_t *); 86 87 static int megaraid_init_mbox(adapter_t *); 88 static void megaraid_fini_mbox(adapter_t *); 89 90 static int megaraid_alloc_cmd_packets(adapter_t *); 91 static void megaraid_free_cmd_packets(adapter_t *); 92 93 static int megaraid_mbox_setup_dma_pools(adapter_t *); 94 static void megaraid_mbox_teardown_dma_pools(adapter_t *); 95 96 static int megaraid_sysfs_alloc_resources(adapter_t *); 97 static void megaraid_sysfs_free_resources(adapter_t *); 98 99 static int megaraid_abort_handler(struct scsi_cmnd *); 100 static int megaraid_reset_handler(struct scsi_cmnd *); 101 102 static int mbox_post_sync_cmd(adapter_t *, uint8_t []); 103 static int mbox_post_sync_cmd_fast(adapter_t *, uint8_t []); 104 static int megaraid_busywait_mbox(mraid_device_t *); 105 static int megaraid_mbox_product_info(adapter_t *); 106 static int megaraid_mbox_extended_cdb(adapter_t *); 107 static int megaraid_mbox_support_ha(adapter_t *, uint16_t *); 108 static int megaraid_mbox_support_random_del(adapter_t *); 109 static int megaraid_mbox_get_max_sg(adapter_t *); 110 static void megaraid_mbox_enum_raid_scsi(adapter_t *); 111 static void megaraid_mbox_flush_cache(adapter_t *); 112 static int megaraid_mbox_fire_sync_cmd(adapter_t *); 113 114 static void megaraid_mbox_display_scb(adapter_t *, scb_t *); 115 static void megaraid_mbox_setup_device_map(adapter_t *); 116 117 static int megaraid_queue_command(struct Scsi_Host *, struct scsi_cmnd *); 118 static scb_t *megaraid_mbox_build_cmd(adapter_t *, struct scsi_cmnd *, int *); 119 static void megaraid_mbox_runpendq(adapter_t *, scb_t *); 120 static void megaraid_mbox_prepare_pthru(adapter_t *, scb_t *, 121 struct scsi_cmnd *); 122 static void megaraid_mbox_prepare_epthru(adapter_t *, scb_t *, 123 struct scsi_cmnd *); 124 125 static irqreturn_t megaraid_isr(int, void *); 126 127 static void megaraid_mbox_dpc(unsigned long); 128 129 static ssize_t megaraid_sysfs_show_app_hndl(struct device *, struct device_attribute *attr, char *); 130 static ssize_t megaraid_sysfs_show_ldnum(struct device *, struct device_attribute *attr, char *); 131 132 static int megaraid_cmm_register(adapter_t *); 133 static int megaraid_cmm_unregister(adapter_t *); 134 static int megaraid_mbox_mm_handler(unsigned long, uioc_t *, uint32_t); 135 static int megaraid_mbox_mm_command(adapter_t *, uioc_t *); 136 static void megaraid_mbox_mm_done(adapter_t *, scb_t *); 137 static int gather_hbainfo(adapter_t *, mraid_hba_info_t *); 138 static int wait_till_fw_empty(adapter_t *); 139 140 141 142 MODULE_AUTHOR("megaraidlinux@lsi.com"); 143 MODULE_DESCRIPTION("LSI Logic MegaRAID Mailbox Driver"); 144 MODULE_LICENSE("GPL"); 145 MODULE_VERSION(MEGARAID_VERSION); 146 147 /* 148 * ### modules parameters for driver ### 149 */ 150 151 /* 152 * Set to enable driver to expose unconfigured disk to kernel 153 */ 154 static int megaraid_expose_unconf_disks = 0; 155 module_param_named(unconf_disks, megaraid_expose_unconf_disks, int, 0); 156 MODULE_PARM_DESC(unconf_disks, 157 "Set to expose unconfigured disks to kernel (default=0)"); 158 159 /* 160 * driver wait time if the adapter's mailbox is busy 161 */ 162 static unsigned int max_mbox_busy_wait = MBOX_BUSY_WAIT; 163 module_param_named(busy_wait, max_mbox_busy_wait, int, 0); 164 MODULE_PARM_DESC(busy_wait, 165 "Max wait for mailbox in microseconds if busy (default=10)"); 166 167 /* 168 * number of sectors per IO command 169 */ 170 static unsigned int megaraid_max_sectors = MBOX_MAX_SECTORS; 171 module_param_named(max_sectors, megaraid_max_sectors, int, 0); 172 MODULE_PARM_DESC(max_sectors, 173 "Maximum number of sectors per IO command (default=128)"); 174 175 /* 176 * number of commands per logical unit 177 */ 178 static unsigned int megaraid_cmd_per_lun = MBOX_DEF_CMD_PER_LUN; 179 module_param_named(cmd_per_lun, megaraid_cmd_per_lun, int, 0); 180 MODULE_PARM_DESC(cmd_per_lun, 181 "Maximum number of commands per logical unit (default=64)"); 182 183 184 /* 185 * Fast driver load option, skip scanning for physical devices during load. 186 * This would result in non-disk devices being skipped during driver load 187 * time. These can be later added though, using /proc/scsi/scsi 188 */ 189 static unsigned int megaraid_fast_load = 0; 190 module_param_named(fast_load, megaraid_fast_load, int, 0); 191 MODULE_PARM_DESC(fast_load, 192 "Faster loading of the driver, skips physical devices! (default=0)"); 193 194 195 /* 196 * mraid_debug level - threshold for amount of information to be displayed by 197 * the driver. This level can be changed through modules parameters, ioctl or 198 * sysfs/proc interface. By default, print the announcement messages only. 199 */ 200 int mraid_debug_level = CL_ANN; 201 module_param_named(debug_level, mraid_debug_level, int, 0); 202 MODULE_PARM_DESC(debug_level, "Debug level for driver (default=0)"); 203 204 /* 205 * PCI table for all supported controllers. 206 */ 207 static struct pci_device_id pci_id_table_g[] = { 208 { 209 PCI_VENDOR_ID_DELL, 210 PCI_DEVICE_ID_PERC4_DI_DISCOVERY, 211 PCI_VENDOR_ID_DELL, 212 PCI_SUBSYS_ID_PERC4_DI_DISCOVERY, 213 }, 214 { 215 PCI_VENDOR_ID_LSI_LOGIC, 216 PCI_DEVICE_ID_PERC4_SC, 217 PCI_VENDOR_ID_DELL, 218 PCI_SUBSYS_ID_PERC4_SC, 219 }, 220 { 221 PCI_VENDOR_ID_LSI_LOGIC, 222 PCI_DEVICE_ID_PERC4_DC, 223 PCI_VENDOR_ID_DELL, 224 PCI_SUBSYS_ID_PERC4_DC, 225 }, 226 { 227 PCI_VENDOR_ID_LSI_LOGIC, 228 PCI_DEVICE_ID_VERDE, 229 PCI_ANY_ID, 230 PCI_ANY_ID, 231 }, 232 { 233 PCI_VENDOR_ID_DELL, 234 PCI_DEVICE_ID_PERC4_DI_EVERGLADES, 235 PCI_VENDOR_ID_DELL, 236 PCI_SUBSYS_ID_PERC4_DI_EVERGLADES, 237 }, 238 { 239 PCI_VENDOR_ID_DELL, 240 PCI_DEVICE_ID_PERC4E_SI_BIGBEND, 241 PCI_VENDOR_ID_DELL, 242 PCI_SUBSYS_ID_PERC4E_SI_BIGBEND, 243 }, 244 { 245 PCI_VENDOR_ID_DELL, 246 PCI_DEVICE_ID_PERC4E_DI_KOBUK, 247 PCI_VENDOR_ID_DELL, 248 PCI_SUBSYS_ID_PERC4E_DI_KOBUK, 249 }, 250 { 251 PCI_VENDOR_ID_DELL, 252 PCI_DEVICE_ID_PERC4E_DI_CORVETTE, 253 PCI_VENDOR_ID_DELL, 254 PCI_SUBSYS_ID_PERC4E_DI_CORVETTE, 255 }, 256 { 257 PCI_VENDOR_ID_DELL, 258 PCI_DEVICE_ID_PERC4E_DI_EXPEDITION, 259 PCI_VENDOR_ID_DELL, 260 PCI_SUBSYS_ID_PERC4E_DI_EXPEDITION, 261 }, 262 { 263 PCI_VENDOR_ID_DELL, 264 PCI_DEVICE_ID_PERC4E_DI_GUADALUPE, 265 PCI_VENDOR_ID_DELL, 266 PCI_SUBSYS_ID_PERC4E_DI_GUADALUPE, 267 }, 268 { 269 PCI_VENDOR_ID_LSI_LOGIC, 270 PCI_DEVICE_ID_DOBSON, 271 PCI_ANY_ID, 272 PCI_ANY_ID, 273 }, 274 { 275 PCI_VENDOR_ID_AMI, 276 PCI_DEVICE_ID_AMI_MEGARAID3, 277 PCI_ANY_ID, 278 PCI_ANY_ID, 279 }, 280 { 281 PCI_VENDOR_ID_LSI_LOGIC, 282 PCI_DEVICE_ID_AMI_MEGARAID3, 283 PCI_ANY_ID, 284 PCI_ANY_ID, 285 }, 286 { 287 PCI_VENDOR_ID_LSI_LOGIC, 288 PCI_DEVICE_ID_LINDSAY, 289 PCI_ANY_ID, 290 PCI_ANY_ID, 291 }, 292 {0} /* Terminating entry */ 293 }; 294 MODULE_DEVICE_TABLE(pci, pci_id_table_g); 295 296 297 static struct pci_driver megaraid_pci_driver = { 298 .name = "megaraid", 299 .id_table = pci_id_table_g, 300 .probe = megaraid_probe_one, 301 .remove = megaraid_detach_one, 302 .shutdown = megaraid_mbox_shutdown, 303 }; 304 305 306 307 // definitions for the device attributes for exporting logical drive number 308 // for a scsi address (Host, Channel, Id, Lun) 309 310 DEVICE_ATTR(megaraid_mbox_app_hndl, S_IRUSR, megaraid_sysfs_show_app_hndl, 311 NULL); 312 313 // Host template initializer for megaraid mbox sysfs device attributes 314 static struct device_attribute *megaraid_shost_attrs[] = { 315 &dev_attr_megaraid_mbox_app_hndl, 316 NULL, 317 }; 318 319 320 DEVICE_ATTR(megaraid_mbox_ld, S_IRUSR, megaraid_sysfs_show_ldnum, NULL); 321 322 // Host template initializer for megaraid mbox sysfs device attributes 323 static struct device_attribute *megaraid_sdev_attrs[] = { 324 &dev_attr_megaraid_mbox_ld, 325 NULL, 326 }; 327 328 /* 329 * Scsi host template for megaraid unified driver 330 */ 331 static struct scsi_host_template megaraid_template_g = { 332 .module = THIS_MODULE, 333 .name = "LSI Logic MegaRAID driver", 334 .proc_name = "megaraid", 335 .queuecommand = megaraid_queue_command, 336 .eh_abort_handler = megaraid_abort_handler, 337 .eh_host_reset_handler = megaraid_reset_handler, 338 .change_queue_depth = scsi_change_queue_depth, 339 .use_clustering = ENABLE_CLUSTERING, 340 .no_write_same = 1, 341 .sdev_attrs = megaraid_sdev_attrs, 342 .shost_attrs = megaraid_shost_attrs, 343 }; 344 345 346 /** 347 * megaraid_init - module load hook 348 * 349 * We register ourselves as hotplug enabled module and let PCI subsystem 350 * discover our adapters. 351 */ 352 static int __init 353 megaraid_init(void) 354 { 355 int rval; 356 357 // Announce the driver version 358 con_log(CL_ANN, (KERN_INFO "megaraid: %s %s\n", MEGARAID_VERSION, 359 MEGARAID_EXT_VERSION)); 360 361 // check validity of module parameters 362 if (megaraid_cmd_per_lun > MBOX_MAX_SCSI_CMDS) { 363 364 con_log(CL_ANN, (KERN_WARNING 365 "megaraid mailbox: max commands per lun reset to %d\n", 366 MBOX_MAX_SCSI_CMDS)); 367 368 megaraid_cmd_per_lun = MBOX_MAX_SCSI_CMDS; 369 } 370 371 372 // register as a PCI hot-plug driver module 373 rval = pci_register_driver(&megaraid_pci_driver); 374 if (rval < 0) { 375 con_log(CL_ANN, (KERN_WARNING 376 "megaraid: could not register hotplug support.\n")); 377 } 378 379 return rval; 380 } 381 382 383 /** 384 * megaraid_exit - driver unload entry point 385 * 386 * We simply unwrap the megaraid_init routine here. 387 */ 388 static void __exit 389 megaraid_exit(void) 390 { 391 con_log(CL_DLEVEL1, (KERN_NOTICE "megaraid: unloading framework\n")); 392 393 // unregister as PCI hotplug driver 394 pci_unregister_driver(&megaraid_pci_driver); 395 396 return; 397 } 398 399 400 /** 401 * megaraid_probe_one - PCI hotplug entry point 402 * @pdev : handle to this controller's PCI configuration space 403 * @id : pci device id of the class of controllers 404 * 405 * This routine should be called whenever a new adapter is detected by the 406 * PCI hotplug susbsystem. 407 */ 408 static int 409 megaraid_probe_one(struct pci_dev *pdev, const struct pci_device_id *id) 410 { 411 adapter_t *adapter; 412 413 414 // detected a new controller 415 con_log(CL_ANN, (KERN_INFO 416 "megaraid: probe new device %#4.04x:%#4.04x:%#4.04x:%#4.04x: ", 417 pdev->vendor, pdev->device, pdev->subsystem_vendor, 418 pdev->subsystem_device)); 419 420 con_log(CL_ANN, ("bus %d:slot %d:func %d\n", pdev->bus->number, 421 PCI_SLOT(pdev->devfn), PCI_FUNC(pdev->devfn))); 422 423 if (pci_enable_device(pdev)) { 424 con_log(CL_ANN, (KERN_WARNING 425 "megaraid: pci_enable_device failed\n")); 426 427 return -ENODEV; 428 } 429 430 // Enable bus-mastering on this controller 431 pci_set_master(pdev); 432 433 // Allocate the per driver initialization structure 434 adapter = kzalloc(sizeof(adapter_t), GFP_KERNEL); 435 436 if (adapter == NULL) { 437 con_log(CL_ANN, (KERN_WARNING 438 "megaraid: out of memory, %s %d.\n", __func__, __LINE__)); 439 440 goto out_probe_one; 441 } 442 443 444 // set up PCI related soft state and other pre-known parameters 445 adapter->unique_id = pdev->bus->number << 8 | pdev->devfn; 446 adapter->irq = pdev->irq; 447 adapter->pdev = pdev; 448 449 atomic_set(&adapter->being_detached, 0); 450 451 // Setup the default DMA mask. This would be changed later on 452 // depending on hardware capabilities 453 if (dma_set_mask(&adapter->pdev->dev, DMA_BIT_MASK(32))) { 454 con_log(CL_ANN, (KERN_WARNING 455 "megaraid: dma_set_mask failed:%d\n", __LINE__)); 456 457 goto out_free_adapter; 458 } 459 460 461 // Initialize the synchronization lock for kernel and LLD 462 spin_lock_init(&adapter->lock); 463 464 // Initialize the command queues: the list of free SCBs and the list 465 // of pending SCBs. 466 INIT_LIST_HEAD(&adapter->kscb_pool); 467 spin_lock_init(SCSI_FREE_LIST_LOCK(adapter)); 468 469 INIT_LIST_HEAD(&adapter->pend_list); 470 spin_lock_init(PENDING_LIST_LOCK(adapter)); 471 472 INIT_LIST_HEAD(&adapter->completed_list); 473 spin_lock_init(COMPLETED_LIST_LOCK(adapter)); 474 475 476 // Start the mailbox based controller 477 if (megaraid_init_mbox(adapter) != 0) { 478 con_log(CL_ANN, (KERN_WARNING 479 "megaraid: mailbox adapter did not initialize\n")); 480 481 goto out_free_adapter; 482 } 483 484 // Register with LSI Common Management Module 485 if (megaraid_cmm_register(adapter) != 0) { 486 487 con_log(CL_ANN, (KERN_WARNING 488 "megaraid: could not register with management module\n")); 489 490 goto out_fini_mbox; 491 } 492 493 // setup adapter handle in PCI soft state 494 pci_set_drvdata(pdev, adapter); 495 496 // attach with scsi mid-layer 497 if (megaraid_io_attach(adapter) != 0) { 498 499 con_log(CL_ANN, (KERN_WARNING "megaraid: io attach failed\n")); 500 501 goto out_cmm_unreg; 502 } 503 504 return 0; 505 506 out_cmm_unreg: 507 megaraid_cmm_unregister(adapter); 508 out_fini_mbox: 509 megaraid_fini_mbox(adapter); 510 out_free_adapter: 511 kfree(adapter); 512 out_probe_one: 513 pci_disable_device(pdev); 514 515 return -ENODEV; 516 } 517 518 519 /** 520 * megaraid_detach_one - release framework resources and call LLD release routine 521 * @pdev : handle for our PCI configuration space 522 * 523 * This routine is called during driver unload. We free all the allocated 524 * resources and call the corresponding LLD so that it can also release all 525 * its resources. 526 * 527 * This routine is also called from the PCI hotplug system. 528 */ 529 static void 530 megaraid_detach_one(struct pci_dev *pdev) 531 { 532 adapter_t *adapter; 533 struct Scsi_Host *host; 534 535 536 // Start a rollback on this adapter 537 adapter = pci_get_drvdata(pdev); 538 539 if (!adapter) { 540 con_log(CL_ANN, (KERN_CRIT 541 "megaraid: Invalid detach on %#4.04x:%#4.04x:%#4.04x:%#4.04x\n", 542 pdev->vendor, pdev->device, pdev->subsystem_vendor, 543 pdev->subsystem_device)); 544 545 return; 546 } 547 else { 548 con_log(CL_ANN, (KERN_NOTICE 549 "megaraid: detaching device %#4.04x:%#4.04x:%#4.04x:%#4.04x\n", 550 pdev->vendor, pdev->device, pdev->subsystem_vendor, 551 pdev->subsystem_device)); 552 } 553 554 555 host = adapter->host; 556 557 // do not allow any more requests from the management module for this 558 // adapter. 559 // FIXME: How do we account for the request which might still be 560 // pending with us? 561 atomic_set(&adapter->being_detached, 1); 562 563 // detach from the IO sub-system 564 megaraid_io_detach(adapter); 565 566 // Unregister from common management module 567 // 568 // FIXME: this must return success or failure for conditions if there 569 // is a command pending with LLD or not. 570 megaraid_cmm_unregister(adapter); 571 572 // finalize the mailbox based controller and release all resources 573 megaraid_fini_mbox(adapter); 574 575 kfree(adapter); 576 577 scsi_host_put(host); 578 579 pci_disable_device(pdev); 580 581 return; 582 } 583 584 585 /** 586 * megaraid_mbox_shutdown - PCI shutdown for megaraid HBA 587 * @pdev : generic driver model device 588 * 589 * Shutdown notification, perform flush cache. 590 */ 591 static void 592 megaraid_mbox_shutdown(struct pci_dev *pdev) 593 { 594 adapter_t *adapter = pci_get_drvdata(pdev); 595 static int counter; 596 597 if (!adapter) { 598 con_log(CL_ANN, (KERN_WARNING 599 "megaraid: null device in shutdown\n")); 600 return; 601 } 602 603 // flush caches now 604 con_log(CL_ANN, (KERN_INFO "megaraid: flushing adapter %d...", 605 counter++)); 606 607 megaraid_mbox_flush_cache(adapter); 608 609 con_log(CL_ANN, ("done\n")); 610 } 611 612 613 /** 614 * megaraid_io_attach - attach a device with the IO subsystem 615 * @adapter : controller's soft state 616 * 617 * Attach this device with the IO subsystem. 618 */ 619 static int 620 megaraid_io_attach(adapter_t *adapter) 621 { 622 struct Scsi_Host *host; 623 624 // Initialize SCSI Host structure 625 host = scsi_host_alloc(&megaraid_template_g, 8); 626 if (!host) { 627 con_log(CL_ANN, (KERN_WARNING 628 "megaraid mbox: scsi_register failed\n")); 629 630 return -1; 631 } 632 633 SCSIHOST2ADAP(host) = (caddr_t)adapter; 634 adapter->host = host; 635 636 host->irq = adapter->irq; 637 host->unique_id = adapter->unique_id; 638 host->can_queue = adapter->max_cmds; 639 host->this_id = adapter->init_id; 640 host->sg_tablesize = adapter->sglen; 641 host->max_sectors = adapter->max_sectors; 642 host->cmd_per_lun = adapter->cmd_per_lun; 643 host->max_channel = adapter->max_channel; 644 host->max_id = adapter->max_target; 645 host->max_lun = adapter->max_lun; 646 647 648 // notify mid-layer about the new controller 649 if (scsi_add_host(host, &adapter->pdev->dev)) { 650 651 con_log(CL_ANN, (KERN_WARNING 652 "megaraid mbox: scsi_add_host failed\n")); 653 654 scsi_host_put(host); 655 656 return -1; 657 } 658 659 scsi_scan_host(host); 660 661 return 0; 662 } 663 664 665 /** 666 * megaraid_io_detach - detach a device from the IO subsystem 667 * @adapter : controller's soft state 668 * 669 * Detach this device from the IO subsystem. 670 */ 671 static void 672 megaraid_io_detach(adapter_t *adapter) 673 { 674 struct Scsi_Host *host; 675 676 con_log(CL_DLEVEL1, (KERN_INFO "megaraid: io detach\n")); 677 678 host = adapter->host; 679 680 scsi_remove_host(host); 681 682 return; 683 } 684 685 686 /* 687 * START: Mailbox Low Level Driver 688 * 689 * This is section specific to the single mailbox based controllers 690 */ 691 692 /** 693 * megaraid_init_mbox - initialize controller 694 * @adapter : our soft state 695 * 696 * - Allocate 16-byte aligned mailbox memory for firmware handshake 697 * - Allocate controller's memory resources 698 * - Find out all initialization data 699 * - Allocate memory required for all the commands 700 * - Use internal library of FW routines, build up complete soft state 701 */ 702 static int 703 megaraid_init_mbox(adapter_t *adapter) 704 { 705 struct pci_dev *pdev; 706 mraid_device_t *raid_dev; 707 int i; 708 uint32_t magic64; 709 710 711 adapter->ito = MBOX_TIMEOUT; 712 pdev = adapter->pdev; 713 714 /* 715 * Allocate and initialize the init data structure for mailbox 716 * controllers 717 */ 718 raid_dev = kzalloc(sizeof(mraid_device_t), GFP_KERNEL); 719 if (raid_dev == NULL) return -1; 720 721 722 /* 723 * Attach the adapter soft state to raid device soft state 724 */ 725 adapter->raid_device = (caddr_t)raid_dev; 726 raid_dev->fast_load = megaraid_fast_load; 727 728 729 // our baseport 730 raid_dev->baseport = pci_resource_start(pdev, 0); 731 732 if (pci_request_regions(pdev, "MegaRAID: LSI Logic Corporation") != 0) { 733 734 con_log(CL_ANN, (KERN_WARNING 735 "megaraid: mem region busy\n")); 736 737 goto out_free_raid_dev; 738 } 739 740 raid_dev->baseaddr = ioremap_nocache(raid_dev->baseport, 128); 741 742 if (!raid_dev->baseaddr) { 743 744 con_log(CL_ANN, (KERN_WARNING 745 "megaraid: could not map hba memory\n") ); 746 747 goto out_release_regions; 748 } 749 750 /* initialize the mutual exclusion lock for the mailbox */ 751 spin_lock_init(&raid_dev->mailbox_lock); 752 753 /* allocate memory required for commands */ 754 if (megaraid_alloc_cmd_packets(adapter) != 0) 755 goto out_iounmap; 756 757 /* 758 * Issue SYNC cmd to flush the pending cmds in the adapter 759 * and initialize its internal state 760 */ 761 762 if (megaraid_mbox_fire_sync_cmd(adapter)) 763 con_log(CL_ANN, ("megaraid: sync cmd failed\n")); 764 765 /* 766 * Setup the rest of the soft state using the library of 767 * FW routines 768 */ 769 770 /* request IRQ and register the interrupt service routine */ 771 if (request_irq(adapter->irq, megaraid_isr, IRQF_SHARED, "megaraid", 772 adapter)) { 773 774 con_log(CL_ANN, (KERN_WARNING 775 "megaraid: Couldn't register IRQ %d!\n", adapter->irq)); 776 goto out_alloc_cmds; 777 778 } 779 780 // Product info 781 if (megaraid_mbox_product_info(adapter) != 0) 782 goto out_free_irq; 783 784 // Do we support extended CDBs 785 adapter->max_cdb_sz = 10; 786 if (megaraid_mbox_extended_cdb(adapter) == 0) { 787 adapter->max_cdb_sz = 16; 788 } 789 790 /* 791 * Do we support cluster environment, if we do, what is the initiator 792 * id. 793 * NOTE: In a non-cluster aware firmware environment, the LLD should 794 * return 7 as initiator id. 795 */ 796 adapter->ha = 0; 797 adapter->init_id = -1; 798 if (megaraid_mbox_support_ha(adapter, &adapter->init_id) == 0) { 799 adapter->ha = 1; 800 } 801 802 /* 803 * Prepare the device ids array to have the mapping between the kernel 804 * device address and megaraid device address. 805 * We export the physical devices on their actual addresses. The 806 * logical drives are exported on a virtual SCSI channel 807 */ 808 megaraid_mbox_setup_device_map(adapter); 809 810 // If the firmware supports random deletion, update the device id map 811 if (megaraid_mbox_support_random_del(adapter)) { 812 813 // Change the logical drives numbers in device_ids array one 814 // slot in device_ids is reserved for target id, that's why 815 // "<=" below 816 for (i = 0; i <= MAX_LOGICAL_DRIVES_40LD; i++) { 817 adapter->device_ids[adapter->max_channel][i] += 0x80; 818 } 819 adapter->device_ids[adapter->max_channel][adapter->init_id] = 820 0xFF; 821 822 raid_dev->random_del_supported = 1; 823 } 824 825 /* 826 * find out the maximum number of scatter-gather elements supported by 827 * this firmware 828 */ 829 adapter->sglen = megaraid_mbox_get_max_sg(adapter); 830 831 // enumerate RAID and SCSI channels so that all devices on SCSI 832 // channels can later be exported, including disk devices 833 megaraid_mbox_enum_raid_scsi(adapter); 834 835 /* 836 * Other parameters required by upper layer 837 * 838 * maximum number of sectors per IO command 839 */ 840 adapter->max_sectors = megaraid_max_sectors; 841 842 /* 843 * number of queued commands per LUN. 844 */ 845 adapter->cmd_per_lun = megaraid_cmd_per_lun; 846 847 /* 848 * Allocate resources required to issue FW calls, when sysfs is 849 * accessed 850 */ 851 if (megaraid_sysfs_alloc_resources(adapter) != 0) 852 goto out_free_irq; 853 854 // Set the DMA mask to 64-bit. All supported controllers as capable of 855 // DMA in this range 856 pci_read_config_dword(adapter->pdev, PCI_CONF_AMISIG64, &magic64); 857 858 if (((magic64 == HBA_SIGNATURE_64_BIT) && 859 ((adapter->pdev->subsystem_device != 860 PCI_SUBSYS_ID_MEGARAID_SATA_150_6) && 861 (adapter->pdev->subsystem_device != 862 PCI_SUBSYS_ID_MEGARAID_SATA_150_4))) || 863 (adapter->pdev->vendor == PCI_VENDOR_ID_LSI_LOGIC && 864 adapter->pdev->device == PCI_DEVICE_ID_VERDE) || 865 (adapter->pdev->vendor == PCI_VENDOR_ID_LSI_LOGIC && 866 adapter->pdev->device == PCI_DEVICE_ID_DOBSON) || 867 (adapter->pdev->vendor == PCI_VENDOR_ID_LSI_LOGIC && 868 adapter->pdev->device == PCI_DEVICE_ID_LINDSAY) || 869 (adapter->pdev->vendor == PCI_VENDOR_ID_DELL && 870 adapter->pdev->device == PCI_DEVICE_ID_PERC4_DI_EVERGLADES) || 871 (adapter->pdev->vendor == PCI_VENDOR_ID_DELL && 872 adapter->pdev->device == PCI_DEVICE_ID_PERC4E_DI_KOBUK)) { 873 if (dma_set_mask(&adapter->pdev->dev, DMA_BIT_MASK(64))) { 874 con_log(CL_ANN, (KERN_WARNING 875 "megaraid: DMA mask for 64-bit failed\n")); 876 877 if (dma_set_mask(&adapter->pdev->dev, 878 DMA_BIT_MASK(32))) { 879 con_log(CL_ANN, (KERN_WARNING 880 "megaraid: 32-bit DMA mask failed\n")); 881 goto out_free_sysfs_res; 882 } 883 } 884 } 885 886 // setup tasklet for DPC 887 tasklet_init(&adapter->dpc_h, megaraid_mbox_dpc, 888 (unsigned long)adapter); 889 890 con_log(CL_DLEVEL1, (KERN_INFO 891 "megaraid mbox hba successfully initialized\n")); 892 893 return 0; 894 895 out_free_sysfs_res: 896 megaraid_sysfs_free_resources(adapter); 897 out_free_irq: 898 free_irq(adapter->irq, adapter); 899 out_alloc_cmds: 900 megaraid_free_cmd_packets(adapter); 901 out_iounmap: 902 iounmap(raid_dev->baseaddr); 903 out_release_regions: 904 pci_release_regions(pdev); 905 out_free_raid_dev: 906 kfree(raid_dev); 907 908 return -1; 909 } 910 911 912 /** 913 * megaraid_fini_mbox - undo controller initialization 914 * @adapter : our soft state 915 */ 916 static void 917 megaraid_fini_mbox(adapter_t *adapter) 918 { 919 mraid_device_t *raid_dev = ADAP2RAIDDEV(adapter); 920 921 // flush all caches 922 megaraid_mbox_flush_cache(adapter); 923 924 tasklet_kill(&adapter->dpc_h); 925 926 megaraid_sysfs_free_resources(adapter); 927 928 megaraid_free_cmd_packets(adapter); 929 930 free_irq(adapter->irq, adapter); 931 932 iounmap(raid_dev->baseaddr); 933 934 pci_release_regions(adapter->pdev); 935 936 kfree(raid_dev); 937 938 return; 939 } 940 941 942 /** 943 * megaraid_alloc_cmd_packets - allocate shared mailbox 944 * @adapter : soft state of the raid controller 945 * 946 * Allocate and align the shared mailbox. This mailbox is used to issue 947 * all the commands. For IO based controllers, the mailbox is also registered 948 * with the FW. Allocate memory for all commands as well. 949 * This is our big allocator. 950 */ 951 static int 952 megaraid_alloc_cmd_packets(adapter_t *adapter) 953 { 954 mraid_device_t *raid_dev = ADAP2RAIDDEV(adapter); 955 struct pci_dev *pdev; 956 unsigned long align; 957 scb_t *scb; 958 mbox_ccb_t *ccb; 959 struct mraid_pci_blk *epthru_pci_blk; 960 struct mraid_pci_blk *sg_pci_blk; 961 struct mraid_pci_blk *mbox_pci_blk; 962 int i; 963 964 pdev = adapter->pdev; 965 966 /* 967 * Setup the mailbox 968 * Allocate the common 16-byte aligned memory for the handshake 969 * mailbox. 970 */ 971 raid_dev->una_mbox64 = dma_zalloc_coherent(&adapter->pdev->dev, 972 sizeof(mbox64_t), &raid_dev->una_mbox64_dma, 973 GFP_KERNEL); 974 975 if (!raid_dev->una_mbox64) { 976 con_log(CL_ANN, (KERN_WARNING 977 "megaraid: out of memory, %s %d\n", __func__, 978 __LINE__)); 979 return -1; 980 } 981 982 /* 983 * Align the mailbox at 16-byte boundary 984 */ 985 raid_dev->mbox = &raid_dev->una_mbox64->mbox32; 986 987 raid_dev->mbox = (mbox_t *)((((unsigned long)raid_dev->mbox) + 15) & 988 (~0UL ^ 0xFUL)); 989 990 raid_dev->mbox64 = (mbox64_t *)(((unsigned long)raid_dev->mbox) - 8); 991 992 align = ((void *)raid_dev->mbox - 993 ((void *)&raid_dev->una_mbox64->mbox32)); 994 995 raid_dev->mbox_dma = (unsigned long)raid_dev->una_mbox64_dma + 8 + 996 align; 997 998 // Allocate memory for commands issued internally 999 adapter->ibuf = dma_zalloc_coherent(&pdev->dev, MBOX_IBUF_SIZE, 1000 &adapter->ibuf_dma_h, GFP_KERNEL); 1001 if (!adapter->ibuf) { 1002 1003 con_log(CL_ANN, (KERN_WARNING 1004 "megaraid: out of memory, %s %d\n", __func__, 1005 __LINE__)); 1006 1007 goto out_free_common_mbox; 1008 } 1009 1010 // Allocate memory for our SCSI Command Blocks and their associated 1011 // memory 1012 1013 /* 1014 * Allocate memory for the base list of scb. Later allocate memory for 1015 * CCBs and embedded components of each CCB and point the pointers in 1016 * scb to the allocated components 1017 * NOTE: The code to allocate SCB will be duplicated in all the LLD 1018 * since the calling routine does not yet know the number of available 1019 * commands. 1020 */ 1021 adapter->kscb_list = kcalloc(MBOX_MAX_SCSI_CMDS, sizeof(scb_t), GFP_KERNEL); 1022 1023 if (adapter->kscb_list == NULL) { 1024 con_log(CL_ANN, (KERN_WARNING 1025 "megaraid: out of memory, %s %d\n", __func__, 1026 __LINE__)); 1027 goto out_free_ibuf; 1028 } 1029 1030 // memory allocation for our command packets 1031 if (megaraid_mbox_setup_dma_pools(adapter) != 0) { 1032 con_log(CL_ANN, (KERN_WARNING 1033 "megaraid: out of memory, %s %d\n", __func__, 1034 __LINE__)); 1035 goto out_free_scb_list; 1036 } 1037 1038 // Adjust the scb pointers and link in the free pool 1039 epthru_pci_blk = raid_dev->epthru_pool; 1040 sg_pci_blk = raid_dev->sg_pool; 1041 mbox_pci_blk = raid_dev->mbox_pool; 1042 1043 for (i = 0; i < MBOX_MAX_SCSI_CMDS; i++) { 1044 scb = adapter->kscb_list + i; 1045 ccb = raid_dev->ccb_list + i; 1046 1047 ccb->mbox = (mbox_t *)(mbox_pci_blk[i].vaddr + 16); 1048 ccb->raw_mbox = (uint8_t *)ccb->mbox; 1049 ccb->mbox64 = (mbox64_t *)(mbox_pci_blk[i].vaddr + 8); 1050 ccb->mbox_dma_h = (unsigned long)mbox_pci_blk[i].dma_addr + 16; 1051 1052 // make sure the mailbox is aligned properly 1053 if (ccb->mbox_dma_h & 0x0F) { 1054 con_log(CL_ANN, (KERN_CRIT 1055 "megaraid mbox: not aligned on 16-bytes\n")); 1056 1057 goto out_teardown_dma_pools; 1058 } 1059 1060 ccb->epthru = (mraid_epassthru_t *) 1061 epthru_pci_blk[i].vaddr; 1062 ccb->epthru_dma_h = epthru_pci_blk[i].dma_addr; 1063 ccb->pthru = (mraid_passthru_t *)ccb->epthru; 1064 ccb->pthru_dma_h = ccb->epthru_dma_h; 1065 1066 1067 ccb->sgl64 = (mbox_sgl64 *)sg_pci_blk[i].vaddr; 1068 ccb->sgl_dma_h = sg_pci_blk[i].dma_addr; 1069 ccb->sgl32 = (mbox_sgl32 *)ccb->sgl64; 1070 1071 scb->ccb = (caddr_t)ccb; 1072 scb->gp = 0; 1073 1074 scb->sno = i; // command index 1075 1076 scb->scp = NULL; 1077 scb->state = SCB_FREE; 1078 scb->dma_direction = DMA_NONE; 1079 scb->dma_type = MRAID_DMA_NONE; 1080 scb->dev_channel = -1; 1081 scb->dev_target = -1; 1082 1083 // put scb in the free pool 1084 list_add_tail(&scb->list, &adapter->kscb_pool); 1085 } 1086 1087 return 0; 1088 1089 out_teardown_dma_pools: 1090 megaraid_mbox_teardown_dma_pools(adapter); 1091 out_free_scb_list: 1092 kfree(adapter->kscb_list); 1093 out_free_ibuf: 1094 dma_free_coherent(&pdev->dev, MBOX_IBUF_SIZE, (void *)adapter->ibuf, 1095 adapter->ibuf_dma_h); 1096 out_free_common_mbox: 1097 dma_free_coherent(&adapter->pdev->dev, sizeof(mbox64_t), 1098 (caddr_t)raid_dev->una_mbox64, raid_dev->una_mbox64_dma); 1099 1100 return -1; 1101 } 1102 1103 1104 /** 1105 * megaraid_free_cmd_packets - free memory 1106 * @adapter : soft state of the raid controller 1107 * 1108 * Release memory resources allocated for commands. 1109 */ 1110 static void 1111 megaraid_free_cmd_packets(adapter_t *adapter) 1112 { 1113 mraid_device_t *raid_dev = ADAP2RAIDDEV(adapter); 1114 1115 megaraid_mbox_teardown_dma_pools(adapter); 1116 1117 kfree(adapter->kscb_list); 1118 1119 dma_free_coherent(&adapter->pdev->dev, MBOX_IBUF_SIZE, 1120 (void *)adapter->ibuf, adapter->ibuf_dma_h); 1121 1122 dma_free_coherent(&adapter->pdev->dev, sizeof(mbox64_t), 1123 (caddr_t)raid_dev->una_mbox64, raid_dev->una_mbox64_dma); 1124 return; 1125 } 1126 1127 1128 /** 1129 * megaraid_mbox_setup_dma_pools - setup dma pool for command packets 1130 * @adapter : HBA soft state 1131 * 1132 * Setup the dma pools for mailbox, passthru and extended passthru structures, 1133 * and scatter-gather lists. 1134 */ 1135 static int 1136 megaraid_mbox_setup_dma_pools(adapter_t *adapter) 1137 { 1138 mraid_device_t *raid_dev = ADAP2RAIDDEV(adapter); 1139 struct mraid_pci_blk *epthru_pci_blk; 1140 struct mraid_pci_blk *sg_pci_blk; 1141 struct mraid_pci_blk *mbox_pci_blk; 1142 int i; 1143 1144 1145 1146 // Allocate memory for 16-bytes aligned mailboxes 1147 raid_dev->mbox_pool_handle = dma_pool_create("megaraid mbox pool", 1148 &adapter->pdev->dev, 1149 sizeof(mbox64_t) + 16, 1150 16, 0); 1151 1152 if (raid_dev->mbox_pool_handle == NULL) { 1153 goto fail_setup_dma_pool; 1154 } 1155 1156 mbox_pci_blk = raid_dev->mbox_pool; 1157 for (i = 0; i < MBOX_MAX_SCSI_CMDS; i++) { 1158 mbox_pci_blk[i].vaddr = dma_pool_alloc( 1159 raid_dev->mbox_pool_handle, 1160 GFP_KERNEL, 1161 &mbox_pci_blk[i].dma_addr); 1162 if (!mbox_pci_blk[i].vaddr) { 1163 goto fail_setup_dma_pool; 1164 } 1165 } 1166 1167 /* 1168 * Allocate memory for each embedded passthru strucuture pointer 1169 * Request for a 128 bytes aligned structure for each passthru command 1170 * structure 1171 * Since passthru and extended passthru commands are exclusive, they 1172 * share common memory pool. Passthru structures piggyback on memory 1173 * allocted to extended passthru since passthru is smaller of the two 1174 */ 1175 raid_dev->epthru_pool_handle = dma_pool_create("megaraid mbox pthru", 1176 &adapter->pdev->dev, sizeof(mraid_epassthru_t), 128, 0); 1177 1178 if (raid_dev->epthru_pool_handle == NULL) { 1179 goto fail_setup_dma_pool; 1180 } 1181 1182 epthru_pci_blk = raid_dev->epthru_pool; 1183 for (i = 0; i < MBOX_MAX_SCSI_CMDS; i++) { 1184 epthru_pci_blk[i].vaddr = dma_pool_alloc( 1185 raid_dev->epthru_pool_handle, 1186 GFP_KERNEL, 1187 &epthru_pci_blk[i].dma_addr); 1188 if (!epthru_pci_blk[i].vaddr) { 1189 goto fail_setup_dma_pool; 1190 } 1191 } 1192 1193 1194 // Allocate memory for each scatter-gather list. Request for 512 bytes 1195 // alignment for each sg list 1196 raid_dev->sg_pool_handle = dma_pool_create("megaraid mbox sg", 1197 &adapter->pdev->dev, 1198 sizeof(mbox_sgl64) * MBOX_MAX_SG_SIZE, 1199 512, 0); 1200 1201 if (raid_dev->sg_pool_handle == NULL) { 1202 goto fail_setup_dma_pool; 1203 } 1204 1205 sg_pci_blk = raid_dev->sg_pool; 1206 for (i = 0; i < MBOX_MAX_SCSI_CMDS; i++) { 1207 sg_pci_blk[i].vaddr = dma_pool_alloc( 1208 raid_dev->sg_pool_handle, 1209 GFP_KERNEL, 1210 &sg_pci_blk[i].dma_addr); 1211 if (!sg_pci_blk[i].vaddr) { 1212 goto fail_setup_dma_pool; 1213 } 1214 } 1215 1216 return 0; 1217 1218 fail_setup_dma_pool: 1219 megaraid_mbox_teardown_dma_pools(adapter); 1220 return -1; 1221 } 1222 1223 1224 /** 1225 * megaraid_mbox_teardown_dma_pools - teardown dma pools for command packets 1226 * @adapter : HBA soft state 1227 * 1228 * Teardown the dma pool for mailbox, passthru and extended passthru 1229 * structures, and scatter-gather lists. 1230 */ 1231 static void 1232 megaraid_mbox_teardown_dma_pools(adapter_t *adapter) 1233 { 1234 mraid_device_t *raid_dev = ADAP2RAIDDEV(adapter); 1235 struct mraid_pci_blk *epthru_pci_blk; 1236 struct mraid_pci_blk *sg_pci_blk; 1237 struct mraid_pci_blk *mbox_pci_blk; 1238 int i; 1239 1240 1241 sg_pci_blk = raid_dev->sg_pool; 1242 for (i = 0; i < MBOX_MAX_SCSI_CMDS && sg_pci_blk[i].vaddr; i++) { 1243 dma_pool_free(raid_dev->sg_pool_handle, sg_pci_blk[i].vaddr, 1244 sg_pci_blk[i].dma_addr); 1245 } 1246 if (raid_dev->sg_pool_handle) 1247 dma_pool_destroy(raid_dev->sg_pool_handle); 1248 1249 1250 epthru_pci_blk = raid_dev->epthru_pool; 1251 for (i = 0; i < MBOX_MAX_SCSI_CMDS && epthru_pci_blk[i].vaddr; i++) { 1252 dma_pool_free(raid_dev->epthru_pool_handle, 1253 epthru_pci_blk[i].vaddr, epthru_pci_blk[i].dma_addr); 1254 } 1255 if (raid_dev->epthru_pool_handle) 1256 dma_pool_destroy(raid_dev->epthru_pool_handle); 1257 1258 1259 mbox_pci_blk = raid_dev->mbox_pool; 1260 for (i = 0; i < MBOX_MAX_SCSI_CMDS && mbox_pci_blk[i].vaddr; i++) { 1261 dma_pool_free(raid_dev->mbox_pool_handle, 1262 mbox_pci_blk[i].vaddr, mbox_pci_blk[i].dma_addr); 1263 } 1264 if (raid_dev->mbox_pool_handle) 1265 dma_pool_destroy(raid_dev->mbox_pool_handle); 1266 1267 return; 1268 } 1269 1270 1271 /** 1272 * megaraid_alloc_scb - detach and return a scb from the free list 1273 * @adapter : controller's soft state 1274 * @scp : pointer to the scsi command to be executed 1275 * 1276 * Return the scb from the head of the free list. %NULL if there are none 1277 * available. 1278 */ 1279 static scb_t * 1280 megaraid_alloc_scb(adapter_t *adapter, struct scsi_cmnd *scp) 1281 { 1282 struct list_head *head = &adapter->kscb_pool; 1283 scb_t *scb = NULL; 1284 unsigned long flags; 1285 1286 // detach scb from free pool 1287 spin_lock_irqsave(SCSI_FREE_LIST_LOCK(adapter), flags); 1288 1289 if (list_empty(head)) { 1290 spin_unlock_irqrestore(SCSI_FREE_LIST_LOCK(adapter), flags); 1291 return NULL; 1292 } 1293 1294 scb = list_entry(head->next, scb_t, list); 1295 list_del_init(&scb->list); 1296 1297 spin_unlock_irqrestore(SCSI_FREE_LIST_LOCK(adapter), flags); 1298 1299 scb->state = SCB_ACTIVE; 1300 scb->scp = scp; 1301 scb->dma_type = MRAID_DMA_NONE; 1302 1303 return scb; 1304 } 1305 1306 1307 /** 1308 * megaraid_dealloc_scb - return the scb to the free pool 1309 * @adapter : controller's soft state 1310 * @scb : scb to be freed 1311 * 1312 * Return the scb back to the free list of scbs. The caller must 'flush' the 1313 * SCB before calling us. E.g., performing pci_unamp and/or pci_sync etc. 1314 * NOTE NOTE: Make sure the scb is not on any list before calling this 1315 * routine. 1316 */ 1317 static inline void 1318 megaraid_dealloc_scb(adapter_t *adapter, scb_t *scb) 1319 { 1320 unsigned long flags; 1321 1322 // put scb in the free pool 1323 scb->state = SCB_FREE; 1324 scb->scp = NULL; 1325 spin_lock_irqsave(SCSI_FREE_LIST_LOCK(adapter), flags); 1326 1327 list_add(&scb->list, &adapter->kscb_pool); 1328 1329 spin_unlock_irqrestore(SCSI_FREE_LIST_LOCK(adapter), flags); 1330 1331 return; 1332 } 1333 1334 1335 /** 1336 * megaraid_mbox_mksgl - make the scatter-gather list 1337 * @adapter : controller's soft state 1338 * @scb : scsi control block 1339 * 1340 * Prepare the scatter-gather list. 1341 */ 1342 static int 1343 megaraid_mbox_mksgl(adapter_t *adapter, scb_t *scb) 1344 { 1345 struct scatterlist *sgl; 1346 mbox_ccb_t *ccb; 1347 struct scsi_cmnd *scp; 1348 int sgcnt; 1349 int i; 1350 1351 1352 scp = scb->scp; 1353 ccb = (mbox_ccb_t *)scb->ccb; 1354 1355 sgcnt = scsi_dma_map(scp); 1356 BUG_ON(sgcnt < 0 || sgcnt > adapter->sglen); 1357 1358 // no mapping required if no data to be transferred 1359 if (!sgcnt) 1360 return 0; 1361 1362 scb->dma_type = MRAID_DMA_WSG; 1363 1364 scsi_for_each_sg(scp, sgl, sgcnt, i) { 1365 ccb->sgl64[i].address = sg_dma_address(sgl); 1366 ccb->sgl64[i].length = sg_dma_len(sgl); 1367 } 1368 1369 // Return count of SG nodes 1370 return sgcnt; 1371 } 1372 1373 1374 /** 1375 * mbox_post_cmd - issue a mailbox command 1376 * @adapter : controller's soft state 1377 * @scb : command to be issued 1378 * 1379 * Post the command to the controller if mailbox is available. 1380 */ 1381 static int 1382 mbox_post_cmd(adapter_t *adapter, scb_t *scb) 1383 { 1384 mraid_device_t *raid_dev = ADAP2RAIDDEV(adapter); 1385 mbox64_t *mbox64; 1386 mbox_t *mbox; 1387 mbox_ccb_t *ccb; 1388 unsigned long flags; 1389 unsigned int i = 0; 1390 1391 1392 ccb = (mbox_ccb_t *)scb->ccb; 1393 mbox = raid_dev->mbox; 1394 mbox64 = raid_dev->mbox64; 1395 1396 /* 1397 * Check for busy mailbox. If it is, return failure - the caller 1398 * should retry later. 1399 */ 1400 spin_lock_irqsave(MAILBOX_LOCK(raid_dev), flags); 1401 1402 if (unlikely(mbox->busy)) { 1403 do { 1404 udelay(1); 1405 i++; 1406 rmb(); 1407 } while(mbox->busy && (i < max_mbox_busy_wait)); 1408 1409 if (mbox->busy) { 1410 1411 spin_unlock_irqrestore(MAILBOX_LOCK(raid_dev), flags); 1412 1413 return -1; 1414 } 1415 } 1416 1417 1418 // Copy this command's mailbox data into "adapter's" mailbox 1419 memcpy((caddr_t)mbox64, (caddr_t)ccb->mbox64, 22); 1420 mbox->cmdid = scb->sno; 1421 1422 adapter->outstanding_cmds++; 1423 1424 mbox->busy = 1; // Set busy 1425 mbox->poll = 0; 1426 mbox->ack = 0; 1427 wmb(); 1428 1429 WRINDOOR(raid_dev, raid_dev->mbox_dma | 0x1); 1430 1431 spin_unlock_irqrestore(MAILBOX_LOCK(raid_dev), flags); 1432 1433 return 0; 1434 } 1435 1436 1437 /** 1438 * megaraid_queue_command - generic queue entry point for all LLDs 1439 * @scp : pointer to the scsi command to be executed 1440 * @done : callback routine to be called after the cmd has be completed 1441 * 1442 * Queue entry point for mailbox based controllers. 1443 */ 1444 static int 1445 megaraid_queue_command_lck(struct scsi_cmnd *scp, void (*done)(struct scsi_cmnd *)) 1446 { 1447 adapter_t *adapter; 1448 scb_t *scb; 1449 int if_busy; 1450 1451 adapter = SCP2ADAPTER(scp); 1452 scp->scsi_done = done; 1453 scp->result = 0; 1454 1455 /* 1456 * Allocate and build a SCB request 1457 * if_busy flag will be set if megaraid_mbox_build_cmd() command could 1458 * not allocate scb. We will return non-zero status in that case. 1459 * NOTE: scb can be null even though certain commands completed 1460 * successfully, e.g., MODE_SENSE and TEST_UNIT_READY, it would 1461 * return 0 in that case, and we would do the callback right away. 1462 */ 1463 if_busy = 0; 1464 scb = megaraid_mbox_build_cmd(adapter, scp, &if_busy); 1465 if (!scb) { // command already completed 1466 done(scp); 1467 return 0; 1468 } 1469 1470 megaraid_mbox_runpendq(adapter, scb); 1471 return if_busy; 1472 } 1473 1474 static DEF_SCSI_QCMD(megaraid_queue_command) 1475 1476 /** 1477 * megaraid_mbox_build_cmd - transform the mid-layer scsi commands 1478 * @adapter : controller's soft state 1479 * @scp : mid-layer scsi command pointer 1480 * @busy : set if request could not be completed because of lack of 1481 * resources 1482 * 1483 * Transform the mid-layer scsi command to megaraid firmware lingua. 1484 * Convert the command issued by mid-layer to format understood by megaraid 1485 * firmware. We also complete certain commands without sending them to firmware. 1486 */ 1487 static scb_t * 1488 megaraid_mbox_build_cmd(adapter_t *adapter, struct scsi_cmnd *scp, int *busy) 1489 { 1490 mraid_device_t *rdev = ADAP2RAIDDEV(adapter); 1491 int channel; 1492 int target; 1493 int islogical; 1494 mbox_ccb_t *ccb; 1495 mraid_passthru_t *pthru; 1496 mbox64_t *mbox64; 1497 mbox_t *mbox; 1498 scb_t *scb; 1499 char skip[] = "skipping"; 1500 char scan[] = "scanning"; 1501 char *ss; 1502 1503 1504 /* 1505 * Get the appropriate device map for the device this command is 1506 * intended for 1507 */ 1508 MRAID_GET_DEVICE_MAP(adapter, scp, channel, target, islogical); 1509 1510 /* 1511 * Logical drive commands 1512 */ 1513 if (islogical) { 1514 switch (scp->cmnd[0]) { 1515 case TEST_UNIT_READY: 1516 /* 1517 * Do we support clustering and is the support enabled 1518 * If no, return success always 1519 */ 1520 if (!adapter->ha) { 1521 scp->result = (DID_OK << 16); 1522 return NULL; 1523 } 1524 1525 if (!(scb = megaraid_alloc_scb(adapter, scp))) { 1526 scp->result = (DID_ERROR << 16); 1527 *busy = 1; 1528 return NULL; 1529 } 1530 1531 scb->dma_direction = scp->sc_data_direction; 1532 scb->dev_channel = 0xFF; 1533 scb->dev_target = target; 1534 ccb = (mbox_ccb_t *)scb->ccb; 1535 1536 /* 1537 * The command id will be provided by the command 1538 * issuance routine 1539 */ 1540 ccb->raw_mbox[0] = CLUSTER_CMD; 1541 ccb->raw_mbox[2] = RESERVATION_STATUS; 1542 ccb->raw_mbox[3] = target; 1543 1544 return scb; 1545 1546 case MODE_SENSE: 1547 { 1548 struct scatterlist *sgl; 1549 caddr_t vaddr; 1550 1551 sgl = scsi_sglist(scp); 1552 if (sg_page(sgl)) { 1553 vaddr = (caddr_t) sg_virt(&sgl[0]); 1554 1555 memset(vaddr, 0, scp->cmnd[4]); 1556 } 1557 else { 1558 con_log(CL_ANN, (KERN_WARNING 1559 "megaraid mailbox: invalid sg:%d\n", 1560 __LINE__)); 1561 } 1562 } 1563 scp->result = (DID_OK << 16); 1564 return NULL; 1565 1566 case INQUIRY: 1567 /* 1568 * Display the channel scan for logical drives 1569 * Do not display scan for a channel if already done. 1570 */ 1571 if (!(rdev->last_disp & (1L << SCP2CHANNEL(scp)))) { 1572 1573 con_log(CL_ANN, (KERN_INFO 1574 "scsi[%d]: scanning scsi channel %d", 1575 adapter->host->host_no, 1576 SCP2CHANNEL(scp))); 1577 1578 con_log(CL_ANN, ( 1579 " [virtual] for logical drives\n")); 1580 1581 rdev->last_disp |= (1L << SCP2CHANNEL(scp)); 1582 } 1583 1584 if (scp->cmnd[1] & MEGA_SCSI_INQ_EVPD) { 1585 scp->sense_buffer[0] = 0x70; 1586 scp->sense_buffer[2] = ILLEGAL_REQUEST; 1587 scp->sense_buffer[12] = MEGA_INVALID_FIELD_IN_CDB; 1588 scp->result = CHECK_CONDITION << 1; 1589 return NULL; 1590 } 1591 1592 /* Fall through */ 1593 1594 case READ_CAPACITY: 1595 /* 1596 * Do not allow LUN > 0 for logical drives and 1597 * requests for more than 40 logical drives 1598 */ 1599 if (SCP2LUN(scp)) { 1600 scp->result = (DID_BAD_TARGET << 16); 1601 return NULL; 1602 } 1603 if ((target % 0x80) >= MAX_LOGICAL_DRIVES_40LD) { 1604 scp->result = (DID_BAD_TARGET << 16); 1605 return NULL; 1606 } 1607 1608 1609 /* Allocate a SCB and initialize passthru */ 1610 if (!(scb = megaraid_alloc_scb(adapter, scp))) { 1611 scp->result = (DID_ERROR << 16); 1612 *busy = 1; 1613 return NULL; 1614 } 1615 1616 ccb = (mbox_ccb_t *)scb->ccb; 1617 scb->dev_channel = 0xFF; 1618 scb->dev_target = target; 1619 pthru = ccb->pthru; 1620 mbox = ccb->mbox; 1621 mbox64 = ccb->mbox64; 1622 1623 pthru->timeout = 0; 1624 pthru->ars = 1; 1625 pthru->reqsenselen = 14; 1626 pthru->islogical = 1; 1627 pthru->logdrv = target; 1628 pthru->cdblen = scp->cmd_len; 1629 memcpy(pthru->cdb, scp->cmnd, scp->cmd_len); 1630 1631 mbox->cmd = MBOXCMD_PASSTHRU64; 1632 scb->dma_direction = scp->sc_data_direction; 1633 1634 pthru->dataxferlen = scsi_bufflen(scp); 1635 pthru->dataxferaddr = ccb->sgl_dma_h; 1636 pthru->numsge = megaraid_mbox_mksgl(adapter, 1637 scb); 1638 1639 mbox->xferaddr = 0xFFFFFFFF; 1640 mbox64->xferaddr_lo = (uint32_t )ccb->pthru_dma_h; 1641 mbox64->xferaddr_hi = 0; 1642 1643 return scb; 1644 1645 case READ_6: 1646 case WRITE_6: 1647 case READ_10: 1648 case WRITE_10: 1649 case READ_12: 1650 case WRITE_12: 1651 1652 /* 1653 * Allocate a SCB and initialize mailbox 1654 */ 1655 if (!(scb = megaraid_alloc_scb(adapter, scp))) { 1656 scp->result = (DID_ERROR << 16); 1657 *busy = 1; 1658 return NULL; 1659 } 1660 ccb = (mbox_ccb_t *)scb->ccb; 1661 scb->dev_channel = 0xFF; 1662 scb->dev_target = target; 1663 mbox = ccb->mbox; 1664 mbox64 = ccb->mbox64; 1665 mbox->logdrv = target; 1666 1667 /* 1668 * A little HACK: 2nd bit is zero for all scsi read 1669 * commands and is set for all scsi write commands 1670 */ 1671 mbox->cmd = (scp->cmnd[0] & 0x02) ? MBOXCMD_LWRITE64: 1672 MBOXCMD_LREAD64 ; 1673 1674 /* 1675 * 6-byte READ(0x08) or WRITE(0x0A) cdb 1676 */ 1677 if (scp->cmd_len == 6) { 1678 mbox->numsectors = (uint32_t)scp->cmnd[4]; 1679 mbox->lba = 1680 ((uint32_t)scp->cmnd[1] << 16) | 1681 ((uint32_t)scp->cmnd[2] << 8) | 1682 (uint32_t)scp->cmnd[3]; 1683 1684 mbox->lba &= 0x1FFFFF; 1685 } 1686 1687 /* 1688 * 10-byte READ(0x28) or WRITE(0x2A) cdb 1689 */ 1690 else if (scp->cmd_len == 10) { 1691 mbox->numsectors = 1692 (uint32_t)scp->cmnd[8] | 1693 ((uint32_t)scp->cmnd[7] << 8); 1694 mbox->lba = 1695 ((uint32_t)scp->cmnd[2] << 24) | 1696 ((uint32_t)scp->cmnd[3] << 16) | 1697 ((uint32_t)scp->cmnd[4] << 8) | 1698 (uint32_t)scp->cmnd[5]; 1699 } 1700 1701 /* 1702 * 12-byte READ(0xA8) or WRITE(0xAA) cdb 1703 */ 1704 else if (scp->cmd_len == 12) { 1705 mbox->lba = 1706 ((uint32_t)scp->cmnd[2] << 24) | 1707 ((uint32_t)scp->cmnd[3] << 16) | 1708 ((uint32_t)scp->cmnd[4] << 8) | 1709 (uint32_t)scp->cmnd[5]; 1710 1711 mbox->numsectors = 1712 ((uint32_t)scp->cmnd[6] << 24) | 1713 ((uint32_t)scp->cmnd[7] << 16) | 1714 ((uint32_t)scp->cmnd[8] << 8) | 1715 (uint32_t)scp->cmnd[9]; 1716 } 1717 else { 1718 con_log(CL_ANN, (KERN_WARNING 1719 "megaraid: unsupported CDB length\n")); 1720 1721 megaraid_dealloc_scb(adapter, scb); 1722 1723 scp->result = (DID_ERROR << 16); 1724 return NULL; 1725 } 1726 1727 scb->dma_direction = scp->sc_data_direction; 1728 1729 // Calculate Scatter-Gather info 1730 mbox64->xferaddr_lo = (uint32_t )ccb->sgl_dma_h; 1731 mbox->numsge = megaraid_mbox_mksgl(adapter, 1732 scb); 1733 mbox->xferaddr = 0xFFFFFFFF; 1734 mbox64->xferaddr_hi = 0; 1735 1736 return scb; 1737 1738 case RESERVE: 1739 case RELEASE: 1740 /* 1741 * Do we support clustering and is the support enabled 1742 */ 1743 if (!adapter->ha) { 1744 scp->result = (DID_BAD_TARGET << 16); 1745 return NULL; 1746 } 1747 1748 /* 1749 * Allocate a SCB and initialize mailbox 1750 */ 1751 if (!(scb = megaraid_alloc_scb(adapter, scp))) { 1752 scp->result = (DID_ERROR << 16); 1753 *busy = 1; 1754 return NULL; 1755 } 1756 1757 ccb = (mbox_ccb_t *)scb->ccb; 1758 scb->dev_channel = 0xFF; 1759 scb->dev_target = target; 1760 ccb->raw_mbox[0] = CLUSTER_CMD; 1761 ccb->raw_mbox[2] = (scp->cmnd[0] == RESERVE) ? 1762 RESERVE_LD : RELEASE_LD; 1763 1764 ccb->raw_mbox[3] = target; 1765 scb->dma_direction = scp->sc_data_direction; 1766 1767 return scb; 1768 1769 default: 1770 scp->result = (DID_BAD_TARGET << 16); 1771 return NULL; 1772 } 1773 } 1774 else { // Passthru device commands 1775 1776 // Do not allow access to target id > 15 or LUN > 7 1777 if (target > 15 || SCP2LUN(scp) > 7) { 1778 scp->result = (DID_BAD_TARGET << 16); 1779 return NULL; 1780 } 1781 1782 // if fast load option was set and scan for last device is 1783 // over, reset the fast_load flag so that during a possible 1784 // next scan, devices can be made available 1785 if (rdev->fast_load && (target == 15) && 1786 (SCP2CHANNEL(scp) == adapter->max_channel -1)) { 1787 1788 con_log(CL_ANN, (KERN_INFO 1789 "megaraid[%d]: physical device scan re-enabled\n", 1790 adapter->host->host_no)); 1791 rdev->fast_load = 0; 1792 } 1793 1794 /* 1795 * Display the channel scan for physical devices 1796 */ 1797 if (!(rdev->last_disp & (1L << SCP2CHANNEL(scp)))) { 1798 1799 ss = rdev->fast_load ? skip : scan; 1800 1801 con_log(CL_ANN, (KERN_INFO 1802 "scsi[%d]: %s scsi channel %d [Phy %d]", 1803 adapter->host->host_no, ss, SCP2CHANNEL(scp), 1804 channel)); 1805 1806 con_log(CL_ANN, ( 1807 " for non-raid devices\n")); 1808 1809 rdev->last_disp |= (1L << SCP2CHANNEL(scp)); 1810 } 1811 1812 // disable channel sweep if fast load option given 1813 if (rdev->fast_load) { 1814 scp->result = (DID_BAD_TARGET << 16); 1815 return NULL; 1816 } 1817 1818 // Allocate a SCB and initialize passthru 1819 if (!(scb = megaraid_alloc_scb(adapter, scp))) { 1820 scp->result = (DID_ERROR << 16); 1821 *busy = 1; 1822 return NULL; 1823 } 1824 1825 ccb = (mbox_ccb_t *)scb->ccb; 1826 scb->dev_channel = channel; 1827 scb->dev_target = target; 1828 scb->dma_direction = scp->sc_data_direction; 1829 mbox = ccb->mbox; 1830 mbox64 = ccb->mbox64; 1831 1832 // Does this firmware support extended CDBs 1833 if (adapter->max_cdb_sz == 16) { 1834 mbox->cmd = MBOXCMD_EXTPTHRU; 1835 1836 megaraid_mbox_prepare_epthru(adapter, scb, scp); 1837 1838 mbox64->xferaddr_lo = (uint32_t)ccb->epthru_dma_h; 1839 mbox64->xferaddr_hi = 0; 1840 mbox->xferaddr = 0xFFFFFFFF; 1841 } 1842 else { 1843 mbox->cmd = MBOXCMD_PASSTHRU64; 1844 1845 megaraid_mbox_prepare_pthru(adapter, scb, scp); 1846 1847 mbox64->xferaddr_lo = (uint32_t)ccb->pthru_dma_h; 1848 mbox64->xferaddr_hi = 0; 1849 mbox->xferaddr = 0xFFFFFFFF; 1850 } 1851 return scb; 1852 } 1853 1854 // NOT REACHED 1855 } 1856 1857 1858 /** 1859 * megaraid_mbox_runpendq - execute commands queued in the pending queue 1860 * @adapter : controller's soft state 1861 * @scb_q : SCB to be queued in the pending list 1862 * 1863 * Scan the pending list for commands which are not yet issued and try to 1864 * post to the controller. The SCB can be a null pointer, which would indicate 1865 * no SCB to be queue, just try to execute the ones in the pending list. 1866 * 1867 * NOTE: We do not actually traverse the pending list. The SCBs are plucked 1868 * out from the head of the pending list. If it is successfully issued, the 1869 * next SCB is at the head now. 1870 */ 1871 static void 1872 megaraid_mbox_runpendq(adapter_t *adapter, scb_t *scb_q) 1873 { 1874 scb_t *scb; 1875 unsigned long flags; 1876 1877 spin_lock_irqsave(PENDING_LIST_LOCK(adapter), flags); 1878 1879 if (scb_q) { 1880 scb_q->state = SCB_PENDQ; 1881 list_add_tail(&scb_q->list, &adapter->pend_list); 1882 } 1883 1884 // if the adapter in not in quiescent mode, post the commands to FW 1885 if (adapter->quiescent) { 1886 spin_unlock_irqrestore(PENDING_LIST_LOCK(adapter), flags); 1887 return; 1888 } 1889 1890 while (!list_empty(&adapter->pend_list)) { 1891 1892 assert_spin_locked(PENDING_LIST_LOCK(adapter)); 1893 1894 scb = list_entry(adapter->pend_list.next, scb_t, list); 1895 1896 // remove the scb from the pending list and try to 1897 // issue. If we are unable to issue it, put back in 1898 // the pending list and return 1899 1900 list_del_init(&scb->list); 1901 1902 spin_unlock_irqrestore(PENDING_LIST_LOCK(adapter), flags); 1903 1904 // if mailbox was busy, return SCB back to pending 1905 // list. Make sure to add at the head, since that's 1906 // where it would have been removed from 1907 1908 scb->state = SCB_ISSUED; 1909 1910 if (mbox_post_cmd(adapter, scb) != 0) { 1911 1912 spin_lock_irqsave(PENDING_LIST_LOCK(adapter), flags); 1913 1914 scb->state = SCB_PENDQ; 1915 1916 list_add(&scb->list, &adapter->pend_list); 1917 1918 spin_unlock_irqrestore(PENDING_LIST_LOCK(adapter), 1919 flags); 1920 1921 return; 1922 } 1923 1924 spin_lock_irqsave(PENDING_LIST_LOCK(adapter), flags); 1925 } 1926 1927 spin_unlock_irqrestore(PENDING_LIST_LOCK(adapter), flags); 1928 1929 1930 return; 1931 } 1932 1933 1934 /** 1935 * megaraid_mbox_prepare_pthru - prepare a command for physical devices 1936 * @adapter : pointer to controller's soft state 1937 * @scb : scsi control block 1938 * @scp : scsi command from the mid-layer 1939 * 1940 * Prepare a command for the scsi physical devices. 1941 */ 1942 static void 1943 megaraid_mbox_prepare_pthru(adapter_t *adapter, scb_t *scb, 1944 struct scsi_cmnd *scp) 1945 { 1946 mbox_ccb_t *ccb; 1947 mraid_passthru_t *pthru; 1948 uint8_t channel; 1949 uint8_t target; 1950 1951 ccb = (mbox_ccb_t *)scb->ccb; 1952 pthru = ccb->pthru; 1953 channel = scb->dev_channel; 1954 target = scb->dev_target; 1955 1956 // 0=6sec, 1=60sec, 2=10min, 3=3hrs, 4=NO timeout 1957 pthru->timeout = 4; 1958 pthru->ars = 1; 1959 pthru->islogical = 0; 1960 pthru->channel = 0; 1961 pthru->target = (channel << 4) | target; 1962 pthru->logdrv = SCP2LUN(scp); 1963 pthru->reqsenselen = 14; 1964 pthru->cdblen = scp->cmd_len; 1965 1966 memcpy(pthru->cdb, scp->cmnd, scp->cmd_len); 1967 1968 if (scsi_bufflen(scp)) { 1969 pthru->dataxferlen = scsi_bufflen(scp); 1970 pthru->dataxferaddr = ccb->sgl_dma_h; 1971 pthru->numsge = megaraid_mbox_mksgl(adapter, scb); 1972 } 1973 else { 1974 pthru->dataxferaddr = 0; 1975 pthru->dataxferlen = 0; 1976 pthru->numsge = 0; 1977 } 1978 return; 1979 } 1980 1981 1982 /** 1983 * megaraid_mbox_prepare_epthru - prepare a command for physical devices 1984 * @adapter : pointer to controller's soft state 1985 * @scb : scsi control block 1986 * @scp : scsi command from the mid-layer 1987 * 1988 * Prepare a command for the scsi physical devices. This routine prepares 1989 * commands for devices which can take extended CDBs (>10 bytes). 1990 */ 1991 static void 1992 megaraid_mbox_prepare_epthru(adapter_t *adapter, scb_t *scb, 1993 struct scsi_cmnd *scp) 1994 { 1995 mbox_ccb_t *ccb; 1996 mraid_epassthru_t *epthru; 1997 uint8_t channel; 1998 uint8_t target; 1999 2000 ccb = (mbox_ccb_t *)scb->ccb; 2001 epthru = ccb->epthru; 2002 channel = scb->dev_channel; 2003 target = scb->dev_target; 2004 2005 // 0=6sec, 1=60sec, 2=10min, 3=3hrs, 4=NO timeout 2006 epthru->timeout = 4; 2007 epthru->ars = 1; 2008 epthru->islogical = 0; 2009 epthru->channel = 0; 2010 epthru->target = (channel << 4) | target; 2011 epthru->logdrv = SCP2LUN(scp); 2012 epthru->reqsenselen = 14; 2013 epthru->cdblen = scp->cmd_len; 2014 2015 memcpy(epthru->cdb, scp->cmnd, scp->cmd_len); 2016 2017 if (scsi_bufflen(scp)) { 2018 epthru->dataxferlen = scsi_bufflen(scp); 2019 epthru->dataxferaddr = ccb->sgl_dma_h; 2020 epthru->numsge = megaraid_mbox_mksgl(adapter, scb); 2021 } 2022 else { 2023 epthru->dataxferaddr = 0; 2024 epthru->dataxferlen = 0; 2025 epthru->numsge = 0; 2026 } 2027 return; 2028 } 2029 2030 2031 /** 2032 * megaraid_ack_sequence - interrupt ack sequence for memory mapped HBAs 2033 * @adapter : controller's soft state 2034 * 2035 * Interrupt acknowledgement sequence for memory mapped HBAs. Find out the 2036 * completed command and put them on the completed list for later processing. 2037 * 2038 * Returns: 1 if the interrupt is valid, 0 otherwise 2039 */ 2040 static int 2041 megaraid_ack_sequence(adapter_t *adapter) 2042 { 2043 mraid_device_t *raid_dev = ADAP2RAIDDEV(adapter); 2044 mbox_t *mbox; 2045 scb_t *scb; 2046 uint8_t nstatus; 2047 uint8_t completed[MBOX_MAX_FIRMWARE_STATUS]; 2048 struct list_head clist; 2049 int handled; 2050 uint32_t dword; 2051 unsigned long flags; 2052 int i, j; 2053 2054 2055 mbox = raid_dev->mbox; 2056 2057 // move the SCBs from the firmware completed array to our local list 2058 INIT_LIST_HEAD(&clist); 2059 2060 // loop till F/W has more commands for us to complete 2061 handled = 0; 2062 spin_lock_irqsave(MAILBOX_LOCK(raid_dev), flags); 2063 do { 2064 /* 2065 * Check if a valid interrupt is pending. If found, force the 2066 * interrupt line low. 2067 */ 2068 dword = RDOUTDOOR(raid_dev); 2069 if (dword != 0x10001234) break; 2070 2071 handled = 1; 2072 2073 WROUTDOOR(raid_dev, 0x10001234); 2074 2075 nstatus = 0; 2076 // wait for valid numstatus to post 2077 for (i = 0; i < 0xFFFFF; i++) { 2078 if (mbox->numstatus != 0xFF) { 2079 nstatus = mbox->numstatus; 2080 break; 2081 } 2082 rmb(); 2083 } 2084 mbox->numstatus = 0xFF; 2085 2086 adapter->outstanding_cmds -= nstatus; 2087 2088 for (i = 0; i < nstatus; i++) { 2089 2090 // wait for valid command index to post 2091 for (j = 0; j < 0xFFFFF; j++) { 2092 if (mbox->completed[i] != 0xFF) break; 2093 rmb(); 2094 } 2095 completed[i] = mbox->completed[i]; 2096 mbox->completed[i] = 0xFF; 2097 2098 if (completed[i] == 0xFF) { 2099 con_log(CL_ANN, (KERN_CRIT 2100 "megaraid: command posting timed out\n")); 2101 2102 BUG(); 2103 continue; 2104 } 2105 2106 // Get SCB associated with this command id 2107 if (completed[i] >= MBOX_MAX_SCSI_CMDS) { 2108 // a cmm command 2109 scb = adapter->uscb_list + (completed[i] - 2110 MBOX_MAX_SCSI_CMDS); 2111 } 2112 else { 2113 // an os command 2114 scb = adapter->kscb_list + completed[i]; 2115 } 2116 2117 scb->status = mbox->status; 2118 list_add_tail(&scb->list, &clist); 2119 } 2120 2121 // Acknowledge interrupt 2122 WRINDOOR(raid_dev, 0x02); 2123 2124 } while(1); 2125 2126 spin_unlock_irqrestore(MAILBOX_LOCK(raid_dev), flags); 2127 2128 2129 // put the completed commands in the completed list. DPC would 2130 // complete these commands later 2131 spin_lock_irqsave(COMPLETED_LIST_LOCK(adapter), flags); 2132 2133 list_splice(&clist, &adapter->completed_list); 2134 2135 spin_unlock_irqrestore(COMPLETED_LIST_LOCK(adapter), flags); 2136 2137 2138 // schedule the DPC if there is some work for it 2139 if (handled) 2140 tasklet_schedule(&adapter->dpc_h); 2141 2142 return handled; 2143 } 2144 2145 2146 /** 2147 * megaraid_isr - isr for memory based mailbox based controllers 2148 * @irq : irq 2149 * @devp : pointer to our soft state 2150 * 2151 * Interrupt service routine for memory-mapped mailbox controllers. 2152 */ 2153 static irqreturn_t 2154 megaraid_isr(int irq, void *devp) 2155 { 2156 adapter_t *adapter = devp; 2157 int handled; 2158 2159 handled = megaraid_ack_sequence(adapter); 2160 2161 /* Loop through any pending requests */ 2162 if (!adapter->quiescent) { 2163 megaraid_mbox_runpendq(adapter, NULL); 2164 } 2165 2166 return IRQ_RETVAL(handled); 2167 } 2168 2169 2170 /** 2171 * megaraid_mbox_dpc - the tasklet to complete the commands from completed list 2172 * @devp : pointer to HBA soft state 2173 * 2174 * Pick up the commands from the completed list and send back to the owners. 2175 * This is a reentrant function and does not assume any locks are held while 2176 * it is being called. 2177 */ 2178 static void 2179 megaraid_mbox_dpc(unsigned long devp) 2180 { 2181 adapter_t *adapter = (adapter_t *)devp; 2182 mraid_device_t *raid_dev; 2183 struct list_head clist; 2184 struct scatterlist *sgl; 2185 scb_t *scb; 2186 scb_t *tmp; 2187 struct scsi_cmnd *scp; 2188 mraid_passthru_t *pthru; 2189 mraid_epassthru_t *epthru; 2190 mbox_ccb_t *ccb; 2191 int islogical; 2192 int pdev_index; 2193 int pdev_state; 2194 mbox_t *mbox; 2195 unsigned long flags; 2196 uint8_t c; 2197 int status; 2198 uioc_t *kioc; 2199 2200 2201 if (!adapter) return; 2202 2203 raid_dev = ADAP2RAIDDEV(adapter); 2204 2205 // move the SCBs from the completed list to our local list 2206 INIT_LIST_HEAD(&clist); 2207 2208 spin_lock_irqsave(COMPLETED_LIST_LOCK(adapter), flags); 2209 2210 list_splice_init(&adapter->completed_list, &clist); 2211 2212 spin_unlock_irqrestore(COMPLETED_LIST_LOCK(adapter), flags); 2213 2214 2215 list_for_each_entry_safe(scb, tmp, &clist, list) { 2216 2217 status = scb->status; 2218 scp = scb->scp; 2219 ccb = (mbox_ccb_t *)scb->ccb; 2220 pthru = ccb->pthru; 2221 epthru = ccb->epthru; 2222 mbox = ccb->mbox; 2223 2224 // Make sure f/w has completed a valid command 2225 if (scb->state != SCB_ISSUED) { 2226 con_log(CL_ANN, (KERN_CRIT 2227 "megaraid critical err: invalid command %d:%d:%p\n", 2228 scb->sno, scb->state, scp)); 2229 BUG(); 2230 continue; // Must never happen! 2231 } 2232 2233 // check for the management command and complete it right away 2234 if (scb->sno >= MBOX_MAX_SCSI_CMDS) { 2235 scb->state = SCB_FREE; 2236 scb->status = status; 2237 2238 // remove from local clist 2239 list_del_init(&scb->list); 2240 2241 kioc = (uioc_t *)scb->gp; 2242 kioc->status = 0; 2243 2244 megaraid_mbox_mm_done(adapter, scb); 2245 2246 continue; 2247 } 2248 2249 // Was an abort issued for this command earlier 2250 if (scb->state & SCB_ABORT) { 2251 con_log(CL_ANN, (KERN_NOTICE 2252 "megaraid: aborted cmd [%x] completed\n", 2253 scb->sno)); 2254 } 2255 2256 /* 2257 * If the inquiry came of a disk drive which is not part of 2258 * any RAID array, expose it to the kernel. For this to be 2259 * enabled, user must set the "megaraid_expose_unconf_disks" 2260 * flag to 1 by specifying it on module parameter list. 2261 * This would enable data migration off drives from other 2262 * configurations. 2263 */ 2264 islogical = MRAID_IS_LOGICAL(adapter, scp); 2265 if (scp->cmnd[0] == INQUIRY && status == 0 && islogical == 0 2266 && IS_RAID_CH(raid_dev, scb->dev_channel)) { 2267 2268 sgl = scsi_sglist(scp); 2269 if (sg_page(sgl)) { 2270 c = *(unsigned char *) sg_virt(&sgl[0]); 2271 } else { 2272 con_log(CL_ANN, (KERN_WARNING 2273 "megaraid mailbox: invalid sg:%d\n", 2274 __LINE__)); 2275 c = 0; 2276 } 2277 2278 if ((c & 0x1F ) == TYPE_DISK) { 2279 pdev_index = (scb->dev_channel * 16) + 2280 scb->dev_target; 2281 pdev_state = 2282 raid_dev->pdrv_state[pdev_index] & 0x0F; 2283 2284 if (pdev_state == PDRV_ONLINE || 2285 pdev_state == PDRV_FAILED || 2286 pdev_state == PDRV_RBLD || 2287 pdev_state == PDRV_HOTSPARE || 2288 megaraid_expose_unconf_disks == 0) { 2289 2290 status = 0xF0; 2291 } 2292 } 2293 } 2294 2295 // Convert MegaRAID status to Linux error code 2296 switch (status) { 2297 2298 case 0x00: 2299 2300 scp->result = (DID_OK << 16); 2301 break; 2302 2303 case 0x02: 2304 2305 /* set sense_buffer and result fields */ 2306 if (mbox->cmd == MBOXCMD_PASSTHRU || 2307 mbox->cmd == MBOXCMD_PASSTHRU64) { 2308 2309 memcpy(scp->sense_buffer, pthru->reqsensearea, 2310 14); 2311 2312 scp->result = DRIVER_SENSE << 24 | 2313 DID_OK << 16 | CHECK_CONDITION << 1; 2314 } 2315 else { 2316 if (mbox->cmd == MBOXCMD_EXTPTHRU) { 2317 2318 memcpy(scp->sense_buffer, 2319 epthru->reqsensearea, 14); 2320 2321 scp->result = DRIVER_SENSE << 24 | 2322 DID_OK << 16 | 2323 CHECK_CONDITION << 1; 2324 } else { 2325 scp->sense_buffer[0] = 0x70; 2326 scp->sense_buffer[2] = ABORTED_COMMAND; 2327 scp->result = CHECK_CONDITION << 1; 2328 } 2329 } 2330 break; 2331 2332 case 0x08: 2333 2334 scp->result = DID_BUS_BUSY << 16 | status; 2335 break; 2336 2337 default: 2338 2339 /* 2340 * If TEST_UNIT_READY fails, we know RESERVATION_STATUS 2341 * failed 2342 */ 2343 if (scp->cmnd[0] == TEST_UNIT_READY) { 2344 scp->result = DID_ERROR << 16 | 2345 RESERVATION_CONFLICT << 1; 2346 } 2347 else 2348 /* 2349 * Error code returned is 1 if Reserve or Release 2350 * failed or the input parameter is invalid 2351 */ 2352 if (status == 1 && (scp->cmnd[0] == RESERVE || 2353 scp->cmnd[0] == RELEASE)) { 2354 2355 scp->result = DID_ERROR << 16 | 2356 RESERVATION_CONFLICT << 1; 2357 } 2358 else { 2359 scp->result = DID_BAD_TARGET << 16 | status; 2360 } 2361 } 2362 2363 // print a debug message for all failed commands 2364 if (status) { 2365 megaraid_mbox_display_scb(adapter, scb); 2366 } 2367 2368 scsi_dma_unmap(scp); 2369 2370 // remove from local clist 2371 list_del_init(&scb->list); 2372 2373 // put back in free list 2374 megaraid_dealloc_scb(adapter, scb); 2375 2376 // send the scsi packet back to kernel 2377 scp->scsi_done(scp); 2378 } 2379 2380 return; 2381 } 2382 2383 2384 /** 2385 * megaraid_abort_handler - abort the scsi command 2386 * @scp : command to be aborted 2387 * 2388 * Abort a previous SCSI request. Only commands on the pending list can be 2389 * aborted. All the commands issued to the F/W must complete. 2390 **/ 2391 static int 2392 megaraid_abort_handler(struct scsi_cmnd *scp) 2393 { 2394 adapter_t *adapter; 2395 mraid_device_t *raid_dev; 2396 scb_t *scb; 2397 scb_t *tmp; 2398 int found; 2399 unsigned long flags; 2400 int i; 2401 2402 2403 adapter = SCP2ADAPTER(scp); 2404 raid_dev = ADAP2RAIDDEV(adapter); 2405 2406 con_log(CL_ANN, (KERN_WARNING 2407 "megaraid: aborting cmd=%x <c=%d t=%d l=%d>\n", 2408 scp->cmnd[0], SCP2CHANNEL(scp), 2409 SCP2TARGET(scp), SCP2LUN(scp))); 2410 2411 // If FW has stopped responding, simply return failure 2412 if (raid_dev->hw_error) { 2413 con_log(CL_ANN, (KERN_NOTICE 2414 "megaraid: hw error, not aborting\n")); 2415 return FAILED; 2416 } 2417 2418 // There might a race here, where the command was completed by the 2419 // firmware and now it is on the completed list. Before we could 2420 // complete the command to the kernel in dpc, the abort came. 2421 // Find out if this is the case to avoid the race. 2422 scb = NULL; 2423 spin_lock_irqsave(COMPLETED_LIST_LOCK(adapter), flags); 2424 list_for_each_entry_safe(scb, tmp, &adapter->completed_list, list) { 2425 2426 if (scb->scp == scp) { // Found command 2427 2428 list_del_init(&scb->list); // from completed list 2429 2430 con_log(CL_ANN, (KERN_WARNING 2431 "megaraid: %d[%d:%d], abort from completed list\n", 2432 scb->sno, scb->dev_channel, scb->dev_target)); 2433 2434 scp->result = (DID_ABORT << 16); 2435 scp->scsi_done(scp); 2436 2437 megaraid_dealloc_scb(adapter, scb); 2438 2439 spin_unlock_irqrestore(COMPLETED_LIST_LOCK(adapter), 2440 flags); 2441 2442 return SUCCESS; 2443 } 2444 } 2445 spin_unlock_irqrestore(COMPLETED_LIST_LOCK(adapter), flags); 2446 2447 2448 // Find out if this command is still on the pending list. If it is and 2449 // was never issued, abort and return success. If the command is owned 2450 // by the firmware, we must wait for it to complete by the FW. 2451 spin_lock_irqsave(PENDING_LIST_LOCK(adapter), flags); 2452 list_for_each_entry_safe(scb, tmp, &adapter->pend_list, list) { 2453 2454 if (scb->scp == scp) { // Found command 2455 2456 list_del_init(&scb->list); // from pending list 2457 2458 ASSERT(!(scb->state & SCB_ISSUED)); 2459 2460 con_log(CL_ANN, (KERN_WARNING 2461 "megaraid abort: [%d:%d], driver owner\n", 2462 scb->dev_channel, scb->dev_target)); 2463 2464 scp->result = (DID_ABORT << 16); 2465 scp->scsi_done(scp); 2466 2467 megaraid_dealloc_scb(adapter, scb); 2468 2469 spin_unlock_irqrestore(PENDING_LIST_LOCK(adapter), 2470 flags); 2471 2472 return SUCCESS; 2473 } 2474 } 2475 spin_unlock_irqrestore(PENDING_LIST_LOCK(adapter), flags); 2476 2477 2478 // Check do we even own this command, in which case this would be 2479 // owned by the firmware. The only way to locate the FW scb is to 2480 // traverse through the list of all SCB, since driver does not 2481 // maintain these SCBs on any list 2482 found = 0; 2483 spin_lock_irq(&adapter->lock); 2484 for (i = 0; i < MBOX_MAX_SCSI_CMDS; i++) { 2485 scb = adapter->kscb_list + i; 2486 2487 if (scb->scp == scp) { 2488 2489 found = 1; 2490 2491 if (!(scb->state & SCB_ISSUED)) { 2492 con_log(CL_ANN, (KERN_WARNING 2493 "megaraid abort: %d[%d:%d], invalid state\n", 2494 scb->sno, scb->dev_channel, scb->dev_target)); 2495 BUG(); 2496 } 2497 else { 2498 con_log(CL_ANN, (KERN_WARNING 2499 "megaraid abort: %d[%d:%d], fw owner\n", 2500 scb->sno, scb->dev_channel, scb->dev_target)); 2501 } 2502 } 2503 } 2504 spin_unlock_irq(&adapter->lock); 2505 2506 if (!found) { 2507 con_log(CL_ANN, (KERN_WARNING "megaraid abort: do now own\n")); 2508 2509 // FIXME: Should there be a callback for this command? 2510 return SUCCESS; 2511 } 2512 2513 // We cannot actually abort a command owned by firmware, return 2514 // failure and wait for reset. In host reset handler, we will find out 2515 // if the HBA is still live 2516 return FAILED; 2517 } 2518 2519 /** 2520 * megaraid_reset_handler - device reset handler for mailbox based driver 2521 * @scp : reference command 2522 * 2523 * Reset handler for the mailbox based controller. First try to find out if 2524 * the FW is still live, in which case the outstanding commands counter mut go 2525 * down to 0. If that happens, also issue the reservation reset command to 2526 * relinquish (possible) reservations on the logical drives connected to this 2527 * host. 2528 **/ 2529 static int 2530 megaraid_reset_handler(struct scsi_cmnd *scp) 2531 { 2532 adapter_t *adapter; 2533 scb_t *scb; 2534 scb_t *tmp; 2535 mraid_device_t *raid_dev; 2536 unsigned long flags; 2537 uint8_t raw_mbox[sizeof(mbox_t)]; 2538 int rval; 2539 int recovery_window; 2540 int i; 2541 uioc_t *kioc; 2542 2543 adapter = SCP2ADAPTER(scp); 2544 raid_dev = ADAP2RAIDDEV(adapter); 2545 2546 // return failure if adapter is not responding 2547 if (raid_dev->hw_error) { 2548 con_log(CL_ANN, (KERN_NOTICE 2549 "megaraid: hw error, cannot reset\n")); 2550 return FAILED; 2551 } 2552 2553 // Under exceptional conditions, FW can take up to 3 minutes to 2554 // complete command processing. Wait for additional 2 minutes for the 2555 // pending commands counter to go down to 0. If it doesn't, let the 2556 // controller be marked offline 2557 // Also, reset all the commands currently owned by the driver 2558 spin_lock_irqsave(PENDING_LIST_LOCK(adapter), flags); 2559 list_for_each_entry_safe(scb, tmp, &adapter->pend_list, list) { 2560 list_del_init(&scb->list); // from pending list 2561 2562 if (scb->sno >= MBOX_MAX_SCSI_CMDS) { 2563 con_log(CL_ANN, (KERN_WARNING 2564 "megaraid: IOCTL packet with %d[%d:%d] being reset\n", 2565 scb->sno, scb->dev_channel, scb->dev_target)); 2566 2567 scb->status = -1; 2568 2569 kioc = (uioc_t *)scb->gp; 2570 kioc->status = -EFAULT; 2571 2572 megaraid_mbox_mm_done(adapter, scb); 2573 } else { 2574 if (scb->scp == scp) { // Found command 2575 con_log(CL_ANN, (KERN_WARNING 2576 "megaraid: %d[%d:%d], reset from pending list\n", 2577 scb->sno, scb->dev_channel, scb->dev_target)); 2578 } else { 2579 con_log(CL_ANN, (KERN_WARNING 2580 "megaraid: IO packet with %d[%d:%d] being reset\n", 2581 scb->sno, scb->dev_channel, scb->dev_target)); 2582 } 2583 2584 scb->scp->result = (DID_RESET << 16); 2585 scb->scp->scsi_done(scb->scp); 2586 2587 megaraid_dealloc_scb(adapter, scb); 2588 } 2589 } 2590 spin_unlock_irqrestore(PENDING_LIST_LOCK(adapter), flags); 2591 2592 if (adapter->outstanding_cmds) { 2593 con_log(CL_ANN, (KERN_NOTICE 2594 "megaraid: %d outstanding commands. Max wait %d sec\n", 2595 adapter->outstanding_cmds, 2596 (MBOX_RESET_WAIT + MBOX_RESET_EXT_WAIT))); 2597 } 2598 2599 recovery_window = MBOX_RESET_WAIT + MBOX_RESET_EXT_WAIT; 2600 2601 for (i = 0; i < recovery_window; i++) { 2602 2603 megaraid_ack_sequence(adapter); 2604 2605 // print a message once every 5 seconds only 2606 if (!(i % 5)) { 2607 con_log(CL_ANN, ( 2608 "megaraid mbox: Wait for %d commands to complete:%d\n", 2609 adapter->outstanding_cmds, 2610 (MBOX_RESET_WAIT + MBOX_RESET_EXT_WAIT) - i)); 2611 } 2612 2613 // bailout if no recovery happened in reset time 2614 if (adapter->outstanding_cmds == 0) { 2615 break; 2616 } 2617 2618 msleep(1000); 2619 } 2620 2621 spin_lock(&adapter->lock); 2622 2623 // If still outstanding commands, bail out 2624 if (adapter->outstanding_cmds) { 2625 con_log(CL_ANN, (KERN_WARNING 2626 "megaraid mbox: critical hardware error!\n")); 2627 2628 raid_dev->hw_error = 1; 2629 2630 rval = FAILED; 2631 goto out; 2632 } 2633 else { 2634 con_log(CL_ANN, (KERN_NOTICE 2635 "megaraid mbox: reset sequence completed successfully\n")); 2636 } 2637 2638 2639 // If the controller supports clustering, reset reservations 2640 if (!adapter->ha) { 2641 rval = SUCCESS; 2642 goto out; 2643 } 2644 2645 // clear reservations if any 2646 raw_mbox[0] = CLUSTER_CMD; 2647 raw_mbox[2] = RESET_RESERVATIONS; 2648 2649 rval = SUCCESS; 2650 if (mbox_post_sync_cmd_fast(adapter, raw_mbox) == 0) { 2651 con_log(CL_ANN, 2652 (KERN_INFO "megaraid: reservation reset\n")); 2653 } 2654 else { 2655 rval = FAILED; 2656 con_log(CL_ANN, (KERN_WARNING 2657 "megaraid: reservation reset failed\n")); 2658 } 2659 2660 out: 2661 spin_unlock(&adapter->lock); 2662 return rval; 2663 } 2664 2665 /* 2666 * START: internal commands library 2667 * 2668 * This section of the driver has the common routine used by the driver and 2669 * also has all the FW routines 2670 */ 2671 2672 /** 2673 * mbox_post_sync_cmd() - blocking command to the mailbox based controllers 2674 * @adapter : controller's soft state 2675 * @raw_mbox : the mailbox 2676 * 2677 * Issue a scb in synchronous and non-interrupt mode for mailbox based 2678 * controllers. 2679 */ 2680 static int 2681 mbox_post_sync_cmd(adapter_t *adapter, uint8_t raw_mbox[]) 2682 { 2683 mraid_device_t *raid_dev = ADAP2RAIDDEV(adapter); 2684 mbox_t *mbox; 2685 uint8_t status; 2686 int i; 2687 2688 mbox = raid_dev->mbox; 2689 2690 /* 2691 * Wait until mailbox is free 2692 */ 2693 if (megaraid_busywait_mbox(raid_dev) != 0) 2694 goto blocked_mailbox; 2695 2696 /* 2697 * Copy mailbox data into host structure 2698 */ 2699 memcpy((caddr_t)mbox, (caddr_t)raw_mbox, 16); 2700 mbox->cmdid = 0xFE; 2701 mbox->busy = 1; 2702 mbox->poll = 0; 2703 mbox->ack = 0; 2704 mbox->numstatus = 0xFF; 2705 mbox->status = 0xFF; 2706 2707 wmb(); 2708 WRINDOOR(raid_dev, raid_dev->mbox_dma | 0x1); 2709 2710 // wait for maximum 1 second for status to post. If the status is not 2711 // available within 1 second, assume FW is initializing and wait 2712 // for an extended amount of time 2713 if (mbox->numstatus == 0xFF) { // status not yet available 2714 udelay(25); 2715 2716 for (i = 0; mbox->numstatus == 0xFF && i < 1000; i++) { 2717 rmb(); 2718 msleep(1); 2719 } 2720 2721 2722 if (i == 1000) { 2723 con_log(CL_ANN, (KERN_NOTICE 2724 "megaraid mailbox: wait for FW to boot ")); 2725 2726 for (i = 0; (mbox->numstatus == 0xFF) && 2727 (i < MBOX_RESET_WAIT); i++) { 2728 rmb(); 2729 con_log(CL_ANN, ("\b\b\b\b\b[%03d]", 2730 MBOX_RESET_WAIT - i)); 2731 msleep(1000); 2732 } 2733 2734 if (i == MBOX_RESET_WAIT) { 2735 2736 con_log(CL_ANN, ( 2737 "\nmegaraid mailbox: status not available\n")); 2738 2739 return -1; 2740 } 2741 con_log(CL_ANN, ("\b\b\b\b\b[ok] \n")); 2742 } 2743 } 2744 2745 // wait for maximum 1 second for poll semaphore 2746 if (mbox->poll != 0x77) { 2747 udelay(25); 2748 2749 for (i = 0; (mbox->poll != 0x77) && (i < 1000); i++) { 2750 rmb(); 2751 msleep(1); 2752 } 2753 2754 if (i == 1000) { 2755 con_log(CL_ANN, (KERN_WARNING 2756 "megaraid mailbox: could not get poll semaphore\n")); 2757 return -1; 2758 } 2759 } 2760 2761 WRINDOOR(raid_dev, raid_dev->mbox_dma | 0x2); 2762 wmb(); 2763 2764 // wait for maximum 1 second for acknowledgement 2765 if (RDINDOOR(raid_dev) & 0x2) { 2766 udelay(25); 2767 2768 for (i = 0; (RDINDOOR(raid_dev) & 0x2) && (i < 1000); i++) { 2769 rmb(); 2770 msleep(1); 2771 } 2772 2773 if (i == 1000) { 2774 con_log(CL_ANN, (KERN_WARNING 2775 "megaraid mailbox: could not acknowledge\n")); 2776 return -1; 2777 } 2778 } 2779 mbox->poll = 0; 2780 mbox->ack = 0x77; 2781 2782 status = mbox->status; 2783 2784 // invalidate the completed command id array. After command 2785 // completion, firmware would write the valid id. 2786 mbox->numstatus = 0xFF; 2787 mbox->status = 0xFF; 2788 for (i = 0; i < MBOX_MAX_FIRMWARE_STATUS; i++) { 2789 mbox->completed[i] = 0xFF; 2790 } 2791 2792 return status; 2793 2794 blocked_mailbox: 2795 2796 con_log(CL_ANN, (KERN_WARNING "megaraid: blocked mailbox\n") ); 2797 return -1; 2798 } 2799 2800 2801 /** 2802 * mbox_post_sync_cmd_fast - blocking command to the mailbox based controllers 2803 * @adapter : controller's soft state 2804 * @raw_mbox : the mailbox 2805 * 2806 * Issue a scb in synchronous and non-interrupt mode for mailbox based 2807 * controllers. This is a faster version of the synchronous command and 2808 * therefore can be called in interrupt-context as well. 2809 */ 2810 static int 2811 mbox_post_sync_cmd_fast(adapter_t *adapter, uint8_t raw_mbox[]) 2812 { 2813 mraid_device_t *raid_dev = ADAP2RAIDDEV(adapter); 2814 mbox_t *mbox; 2815 long i; 2816 2817 2818 mbox = raid_dev->mbox; 2819 2820 // return immediately if the mailbox is busy 2821 if (mbox->busy) return -1; 2822 2823 // Copy mailbox data into host structure 2824 memcpy((caddr_t)mbox, (caddr_t)raw_mbox, 14); 2825 mbox->cmdid = 0xFE; 2826 mbox->busy = 1; 2827 mbox->poll = 0; 2828 mbox->ack = 0; 2829 mbox->numstatus = 0xFF; 2830 mbox->status = 0xFF; 2831 2832 wmb(); 2833 WRINDOOR(raid_dev, raid_dev->mbox_dma | 0x1); 2834 2835 for (i = 0; i < MBOX_SYNC_WAIT_CNT; i++) { 2836 if (mbox->numstatus != 0xFF) break; 2837 rmb(); 2838 udelay(MBOX_SYNC_DELAY_200); 2839 } 2840 2841 if (i == MBOX_SYNC_WAIT_CNT) { 2842 // We may need to re-calibrate the counter 2843 con_log(CL_ANN, (KERN_CRIT 2844 "megaraid: fast sync command timed out\n")); 2845 } 2846 2847 WRINDOOR(raid_dev, raid_dev->mbox_dma | 0x2); 2848 wmb(); 2849 2850 return mbox->status; 2851 } 2852 2853 2854 /** 2855 * megaraid_busywait_mbox() - Wait until the controller's mailbox is available 2856 * @raid_dev : RAID device (HBA) soft state 2857 * 2858 * Wait until the controller's mailbox is available to accept more commands. 2859 * Wait for at most 1 second. 2860 */ 2861 static int 2862 megaraid_busywait_mbox(mraid_device_t *raid_dev) 2863 { 2864 mbox_t *mbox = raid_dev->mbox; 2865 int i = 0; 2866 2867 if (mbox->busy) { 2868 udelay(25); 2869 for (i = 0; mbox->busy && i < 1000; i++) 2870 msleep(1); 2871 } 2872 2873 if (i < 1000) return 0; 2874 else return -1; 2875 } 2876 2877 2878 /** 2879 * megaraid_mbox_product_info - some static information about the controller 2880 * @adapter : our soft state 2881 * 2882 * Issue commands to the controller to grab some parameters required by our 2883 * caller. 2884 */ 2885 static int 2886 megaraid_mbox_product_info(adapter_t *adapter) 2887 { 2888 mraid_device_t *raid_dev = ADAP2RAIDDEV(adapter); 2889 mbox_t *mbox; 2890 uint8_t raw_mbox[sizeof(mbox_t)]; 2891 mraid_pinfo_t *pinfo; 2892 dma_addr_t pinfo_dma_h; 2893 mraid_inquiry3_t *mraid_inq3; 2894 int i; 2895 2896 2897 memset((caddr_t)raw_mbox, 0, sizeof(raw_mbox)); 2898 mbox = (mbox_t *)raw_mbox; 2899 2900 /* 2901 * Issue an ENQUIRY3 command to find out certain adapter parameters, 2902 * e.g., max channels, max commands etc. 2903 */ 2904 pinfo = dma_zalloc_coherent(&adapter->pdev->dev, sizeof(mraid_pinfo_t), 2905 &pinfo_dma_h, GFP_KERNEL); 2906 if (pinfo == NULL) { 2907 con_log(CL_ANN, (KERN_WARNING 2908 "megaraid: out of memory, %s %d\n", __func__, 2909 __LINE__)); 2910 2911 return -1; 2912 } 2913 2914 mbox->xferaddr = (uint32_t)adapter->ibuf_dma_h; 2915 memset((void *)adapter->ibuf, 0, MBOX_IBUF_SIZE); 2916 2917 raw_mbox[0] = FC_NEW_CONFIG; 2918 raw_mbox[2] = NC_SUBOP_ENQUIRY3; 2919 raw_mbox[3] = ENQ3_GET_SOLICITED_FULL; 2920 2921 // Issue the command 2922 if (mbox_post_sync_cmd(adapter, raw_mbox) != 0) { 2923 2924 con_log(CL_ANN, (KERN_WARNING "megaraid: Inquiry3 failed\n")); 2925 2926 dma_free_coherent(&adapter->pdev->dev, sizeof(mraid_pinfo_t), 2927 pinfo, pinfo_dma_h); 2928 2929 return -1; 2930 } 2931 2932 /* 2933 * Collect information about state of each physical drive 2934 * attached to the controller. We will expose all the disks 2935 * which are not part of RAID 2936 */ 2937 mraid_inq3 = (mraid_inquiry3_t *)adapter->ibuf; 2938 for (i = 0; i < MBOX_MAX_PHYSICAL_DRIVES; i++) { 2939 raid_dev->pdrv_state[i] = mraid_inq3->pdrv_state[i]; 2940 } 2941 2942 /* 2943 * Get product info for information like number of channels, 2944 * maximum commands supported. 2945 */ 2946 memset((caddr_t)raw_mbox, 0, sizeof(raw_mbox)); 2947 mbox->xferaddr = (uint32_t)pinfo_dma_h; 2948 2949 raw_mbox[0] = FC_NEW_CONFIG; 2950 raw_mbox[2] = NC_SUBOP_PRODUCT_INFO; 2951 2952 if (mbox_post_sync_cmd(adapter, raw_mbox) != 0) { 2953 2954 con_log(CL_ANN, (KERN_WARNING 2955 "megaraid: product info failed\n")); 2956 2957 dma_free_coherent(&adapter->pdev->dev, sizeof(mraid_pinfo_t), 2958 pinfo, pinfo_dma_h); 2959 2960 return -1; 2961 } 2962 2963 /* 2964 * Setup some parameters for host, as required by our caller 2965 */ 2966 adapter->max_channel = pinfo->nchannels; 2967 2968 /* 2969 * we will export all the logical drives on a single channel. 2970 * Add 1 since inquires do not come for inititor ID 2971 */ 2972 adapter->max_target = MAX_LOGICAL_DRIVES_40LD + 1; 2973 adapter->max_lun = 8; // up to 8 LUNs for non-disk devices 2974 2975 /* 2976 * These are the maximum outstanding commands for the scsi-layer 2977 */ 2978 adapter->max_cmds = MBOX_MAX_SCSI_CMDS; 2979 2980 memset(adapter->fw_version, 0, VERSION_SIZE); 2981 memset(adapter->bios_version, 0, VERSION_SIZE); 2982 2983 memcpy(adapter->fw_version, pinfo->fw_version, 4); 2984 adapter->fw_version[4] = 0; 2985 2986 memcpy(adapter->bios_version, pinfo->bios_version, 4); 2987 adapter->bios_version[4] = 0; 2988 2989 con_log(CL_ANN, (KERN_NOTICE 2990 "megaraid: fw version:[%s] bios version:[%s]\n", 2991 adapter->fw_version, adapter->bios_version)); 2992 2993 dma_free_coherent(&adapter->pdev->dev, sizeof(mraid_pinfo_t), pinfo, 2994 pinfo_dma_h); 2995 2996 return 0; 2997 } 2998 2999 3000 3001 /** 3002 * megaraid_mbox_extended_cdb - check for support for extended CDBs 3003 * @adapter : soft state for the controller 3004 * 3005 * This routine check whether the controller in question supports extended 3006 * ( > 10 bytes ) CDBs. 3007 */ 3008 static int 3009 megaraid_mbox_extended_cdb(adapter_t *adapter) 3010 { 3011 mbox_t *mbox; 3012 uint8_t raw_mbox[sizeof(mbox_t)]; 3013 int rval; 3014 3015 mbox = (mbox_t *)raw_mbox; 3016 3017 memset((caddr_t)raw_mbox, 0, sizeof(raw_mbox)); 3018 mbox->xferaddr = (uint32_t)adapter->ibuf_dma_h; 3019 3020 memset((void *)adapter->ibuf, 0, MBOX_IBUF_SIZE); 3021 3022 raw_mbox[0] = MAIN_MISC_OPCODE; 3023 raw_mbox[2] = SUPPORT_EXT_CDB; 3024 3025 /* 3026 * Issue the command 3027 */ 3028 rval = 0; 3029 if (mbox_post_sync_cmd(adapter, raw_mbox) != 0) { 3030 rval = -1; 3031 } 3032 3033 return rval; 3034 } 3035 3036 3037 /** 3038 * megaraid_mbox_support_ha - Do we support clustering 3039 * @adapter : soft state for the controller 3040 * @init_id : ID of the initiator 3041 * 3042 * Determine if the firmware supports clustering and the ID of the initiator. 3043 */ 3044 static int 3045 megaraid_mbox_support_ha(adapter_t *adapter, uint16_t *init_id) 3046 { 3047 mbox_t *mbox; 3048 uint8_t raw_mbox[sizeof(mbox_t)]; 3049 int rval; 3050 3051 3052 mbox = (mbox_t *)raw_mbox; 3053 3054 memset((caddr_t)raw_mbox, 0, sizeof(raw_mbox)); 3055 3056 mbox->xferaddr = (uint32_t)adapter->ibuf_dma_h; 3057 3058 memset((void *)adapter->ibuf, 0, MBOX_IBUF_SIZE); 3059 3060 raw_mbox[0] = GET_TARGET_ID; 3061 3062 // Issue the command 3063 *init_id = 7; 3064 rval = -1; 3065 if (mbox_post_sync_cmd(adapter, raw_mbox) == 0) { 3066 3067 *init_id = *(uint8_t *)adapter->ibuf; 3068 3069 con_log(CL_ANN, (KERN_INFO 3070 "megaraid: cluster firmware, initiator ID: %d\n", 3071 *init_id)); 3072 3073 rval = 0; 3074 } 3075 3076 return rval; 3077 } 3078 3079 3080 /** 3081 * megaraid_mbox_support_random_del - Do we support random deletion 3082 * @adapter : soft state for the controller 3083 * 3084 * Determine if the firmware supports random deletion. 3085 * Return: 1 is operation supported, 0 otherwise 3086 */ 3087 static int 3088 megaraid_mbox_support_random_del(adapter_t *adapter) 3089 { 3090 uint8_t raw_mbox[sizeof(mbox_t)]; 3091 int rval; 3092 3093 /* 3094 * Newer firmware on Dell CERC expect a different 3095 * random deletion handling, so disable it. 3096 */ 3097 if (adapter->pdev->vendor == PCI_VENDOR_ID_AMI && 3098 adapter->pdev->device == PCI_DEVICE_ID_AMI_MEGARAID3 && 3099 adapter->pdev->subsystem_vendor == PCI_VENDOR_ID_DELL && 3100 adapter->pdev->subsystem_device == PCI_SUBSYS_ID_CERC_ATA100_4CH && 3101 (adapter->fw_version[0] > '6' || 3102 (adapter->fw_version[0] == '6' && 3103 adapter->fw_version[2] > '6') || 3104 (adapter->fw_version[0] == '6' 3105 && adapter->fw_version[2] == '6' 3106 && adapter->fw_version[3] > '1'))) { 3107 con_log(CL_DLEVEL1, ("megaraid: disable random deletion\n")); 3108 return 0; 3109 } 3110 3111 memset((caddr_t)raw_mbox, 0, sizeof(mbox_t)); 3112 3113 raw_mbox[0] = FC_DEL_LOGDRV; 3114 raw_mbox[2] = OP_SUP_DEL_LOGDRV; 3115 3116 // Issue the command 3117 rval = 0; 3118 if (mbox_post_sync_cmd(adapter, raw_mbox) == 0) { 3119 3120 con_log(CL_DLEVEL1, ("megaraid: supports random deletion\n")); 3121 3122 rval = 1; 3123 } 3124 3125 return rval; 3126 } 3127 3128 3129 /** 3130 * megaraid_mbox_get_max_sg - maximum sg elements supported by the firmware 3131 * @adapter : soft state for the controller 3132 * 3133 * Find out the maximum number of scatter-gather elements supported by the 3134 * firmware. 3135 */ 3136 static int 3137 megaraid_mbox_get_max_sg(adapter_t *adapter) 3138 { 3139 mbox_t *mbox; 3140 uint8_t raw_mbox[sizeof(mbox_t)]; 3141 int nsg; 3142 3143 3144 mbox = (mbox_t *)raw_mbox; 3145 3146 memset((caddr_t)raw_mbox, 0, sizeof(mbox_t)); 3147 3148 mbox->xferaddr = (uint32_t)adapter->ibuf_dma_h; 3149 3150 memset((void *)adapter->ibuf, 0, MBOX_IBUF_SIZE); 3151 3152 raw_mbox[0] = MAIN_MISC_OPCODE; 3153 raw_mbox[2] = GET_MAX_SG_SUPPORT; 3154 3155 // Issue the command 3156 if (mbox_post_sync_cmd(adapter, raw_mbox) == 0) { 3157 nsg = *(uint8_t *)adapter->ibuf; 3158 } 3159 else { 3160 nsg = MBOX_DEFAULT_SG_SIZE; 3161 } 3162 3163 if (nsg > MBOX_MAX_SG_SIZE) nsg = MBOX_MAX_SG_SIZE; 3164 3165 return nsg; 3166 } 3167 3168 3169 /** 3170 * megaraid_mbox_enum_raid_scsi - enumerate the RAID and SCSI channels 3171 * @adapter : soft state for the controller 3172 * 3173 * Enumerate the RAID and SCSI channels for ROMB platforms so that channels 3174 * can be exported as regular SCSI channels. 3175 */ 3176 static void 3177 megaraid_mbox_enum_raid_scsi(adapter_t *adapter) 3178 { 3179 mraid_device_t *raid_dev = ADAP2RAIDDEV(adapter); 3180 mbox_t *mbox; 3181 uint8_t raw_mbox[sizeof(mbox_t)]; 3182 3183 3184 mbox = (mbox_t *)raw_mbox; 3185 3186 memset((caddr_t)raw_mbox, 0, sizeof(mbox_t)); 3187 3188 mbox->xferaddr = (uint32_t)adapter->ibuf_dma_h; 3189 3190 memset((void *)adapter->ibuf, 0, MBOX_IBUF_SIZE); 3191 3192 raw_mbox[0] = CHNL_CLASS; 3193 raw_mbox[2] = GET_CHNL_CLASS; 3194 3195 // Issue the command. If the command fails, all channels are RAID 3196 // channels 3197 raid_dev->channel_class = 0xFF; 3198 if (mbox_post_sync_cmd(adapter, raw_mbox) == 0) { 3199 raid_dev->channel_class = *(uint8_t *)adapter->ibuf; 3200 } 3201 3202 return; 3203 } 3204 3205 3206 /** 3207 * megaraid_mbox_flush_cache - flush adapter and disks cache 3208 * @adapter : soft state for the controller 3209 * 3210 * Flush adapter cache followed by disks cache. 3211 */ 3212 static void 3213 megaraid_mbox_flush_cache(adapter_t *adapter) 3214 { 3215 uint8_t raw_mbox[sizeof(mbox_t)]; 3216 3217 memset((caddr_t)raw_mbox, 0, sizeof(mbox_t)); 3218 3219 raw_mbox[0] = FLUSH_ADAPTER; 3220 3221 if (mbox_post_sync_cmd(adapter, raw_mbox) != 0) { 3222 con_log(CL_ANN, ("megaraid: flush adapter failed\n")); 3223 } 3224 3225 raw_mbox[0] = FLUSH_SYSTEM; 3226 3227 if (mbox_post_sync_cmd(adapter, raw_mbox) != 0) { 3228 con_log(CL_ANN, ("megaraid: flush disks cache failed\n")); 3229 } 3230 3231 return; 3232 } 3233 3234 3235 /** 3236 * megaraid_mbox_fire_sync_cmd - fire the sync cmd 3237 * @adapter : soft state for the controller 3238 * 3239 * Clears the pending cmds in FW and reinits its RAID structs. 3240 */ 3241 static int 3242 megaraid_mbox_fire_sync_cmd(adapter_t *adapter) 3243 { 3244 mbox_t *mbox; 3245 uint8_t raw_mbox[sizeof(mbox_t)]; 3246 mraid_device_t *raid_dev = ADAP2RAIDDEV(adapter); 3247 int status = 0; 3248 int i; 3249 uint32_t dword; 3250 3251 mbox = (mbox_t *)raw_mbox; 3252 3253 memset((caddr_t)raw_mbox, 0, sizeof(mbox_t)); 3254 3255 raw_mbox[0] = 0xFF; 3256 3257 mbox = raid_dev->mbox; 3258 3259 /* Wait until mailbox is free */ 3260 if (megaraid_busywait_mbox(raid_dev) != 0) { 3261 status = 1; 3262 goto blocked_mailbox; 3263 } 3264 3265 /* Copy mailbox data into host structure */ 3266 memcpy((caddr_t)mbox, (caddr_t)raw_mbox, 16); 3267 mbox->cmdid = 0xFE; 3268 mbox->busy = 1; 3269 mbox->poll = 0; 3270 mbox->ack = 0; 3271 mbox->numstatus = 0; 3272 mbox->status = 0; 3273 3274 wmb(); 3275 WRINDOOR(raid_dev, raid_dev->mbox_dma | 0x1); 3276 3277 /* Wait for maximum 1 min for status to post. 3278 * If the Firmware SUPPORTS the ABOVE COMMAND, 3279 * mbox->cmd will be set to 0 3280 * else 3281 * the firmware will reject the command with 3282 * mbox->numstatus set to 1 3283 */ 3284 3285 i = 0; 3286 status = 0; 3287 while (!mbox->numstatus && mbox->cmd == 0xFF) { 3288 rmb(); 3289 msleep(1); 3290 i++; 3291 if (i > 1000 * 60) { 3292 status = 1; 3293 break; 3294 } 3295 } 3296 if (mbox->numstatus == 1) 3297 status = 1; /*cmd not supported*/ 3298 3299 /* Check for interrupt line */ 3300 dword = RDOUTDOOR(raid_dev); 3301 WROUTDOOR(raid_dev, dword); 3302 WRINDOOR(raid_dev,2); 3303 3304 return status; 3305 3306 blocked_mailbox: 3307 con_log(CL_ANN, (KERN_WARNING "megaraid: blocked mailbox\n")); 3308 return status; 3309 } 3310 3311 /** 3312 * megaraid_mbox_display_scb - display SCB information, mostly debug purposes 3313 * @adapter : controller's soft state 3314 * @scb : SCB to be displayed 3315 * @level : debug level for console print 3316 * 3317 * Diplay information about the given SCB iff the current debug level is 3318 * verbose. 3319 */ 3320 static void 3321 megaraid_mbox_display_scb(adapter_t *adapter, scb_t *scb) 3322 { 3323 mbox_ccb_t *ccb; 3324 struct scsi_cmnd *scp; 3325 mbox_t *mbox; 3326 int level; 3327 int i; 3328 3329 3330 ccb = (mbox_ccb_t *)scb->ccb; 3331 scp = scb->scp; 3332 mbox = ccb->mbox; 3333 3334 level = CL_DLEVEL3; 3335 3336 con_log(level, (KERN_NOTICE 3337 "megaraid mailbox: status:%#x cmd:%#x id:%#x ", scb->status, 3338 mbox->cmd, scb->sno)); 3339 3340 con_log(level, ("sec:%#x lba:%#x addr:%#x ld:%d sg:%d\n", 3341 mbox->numsectors, mbox->lba, mbox->xferaddr, mbox->logdrv, 3342 mbox->numsge)); 3343 3344 if (!scp) return; 3345 3346 con_log(level, (KERN_NOTICE "scsi cmnd: ")); 3347 3348 for (i = 0; i < scp->cmd_len; i++) { 3349 con_log(level, ("%#2.02x ", scp->cmnd[i])); 3350 } 3351 3352 con_log(level, ("\n")); 3353 3354 return; 3355 } 3356 3357 3358 /** 3359 * megaraid_mbox_setup_device_map - manage device ids 3360 * @adapter : Driver's soft state 3361 * 3362 * Manage the device ids to have an appropriate mapping between the kernel 3363 * scsi addresses and megaraid scsi and logical drive addresses. We export 3364 * scsi devices on their actual addresses, whereas the logical drives are 3365 * exported on a virtual scsi channel. 3366 */ 3367 static void 3368 megaraid_mbox_setup_device_map(adapter_t *adapter) 3369 { 3370 uint8_t c; 3371 uint8_t t; 3372 3373 /* 3374 * First fill the values on the logical drive channel 3375 */ 3376 for (t = 0; t < LSI_MAX_LOGICAL_DRIVES_64LD; t++) 3377 adapter->device_ids[adapter->max_channel][t] = 3378 (t < adapter->init_id) ? t : t - 1; 3379 3380 adapter->device_ids[adapter->max_channel][adapter->init_id] = 0xFF; 3381 3382 /* 3383 * Fill the values on the physical devices channels 3384 */ 3385 for (c = 0; c < adapter->max_channel; c++) 3386 for (t = 0; t < LSI_MAX_LOGICAL_DRIVES_64LD; t++) 3387 adapter->device_ids[c][t] = (c << 8) | t; 3388 } 3389 3390 3391 /* 3392 * END: internal commands library 3393 */ 3394 3395 /* 3396 * START: Interface for the common management module 3397 * 3398 * This is the module, which interfaces with the common management module to 3399 * provide support for ioctl and sysfs 3400 */ 3401 3402 /** 3403 * megaraid_cmm_register - register with the management module 3404 * @adapter : HBA soft state 3405 * 3406 * Register with the management module, which allows applications to issue 3407 * ioctl calls to the drivers. This interface is used by the management module 3408 * to setup sysfs support as well. 3409 */ 3410 static int 3411 megaraid_cmm_register(adapter_t *adapter) 3412 { 3413 mraid_device_t *raid_dev = ADAP2RAIDDEV(adapter); 3414 mraid_mmadp_t adp; 3415 scb_t *scb; 3416 mbox_ccb_t *ccb; 3417 int rval; 3418 int i; 3419 3420 // Allocate memory for the base list of scb for management module. 3421 adapter->uscb_list = kcalloc(MBOX_MAX_USER_CMDS, sizeof(scb_t), GFP_KERNEL); 3422 3423 if (adapter->uscb_list == NULL) { 3424 con_log(CL_ANN, (KERN_WARNING 3425 "megaraid: out of memory, %s %d\n", __func__, 3426 __LINE__)); 3427 return -1; 3428 } 3429 3430 3431 // Initialize the synchronization parameters for resources for 3432 // commands for management module 3433 INIT_LIST_HEAD(&adapter->uscb_pool); 3434 3435 spin_lock_init(USER_FREE_LIST_LOCK(adapter)); 3436 3437 3438 3439 // link all the packets. Note, CCB for commands, coming from the 3440 // commom management module, mailbox physical address are already 3441 // setup by it. We just need placeholder for that in our local command 3442 // control blocks 3443 for (i = 0; i < MBOX_MAX_USER_CMDS; i++) { 3444 3445 scb = adapter->uscb_list + i; 3446 ccb = raid_dev->uccb_list + i; 3447 3448 scb->ccb = (caddr_t)ccb; 3449 ccb->mbox64 = raid_dev->umbox64 + i; 3450 ccb->mbox = &ccb->mbox64->mbox32; 3451 ccb->raw_mbox = (uint8_t *)ccb->mbox; 3452 3453 scb->gp = 0; 3454 3455 // COMMAND ID 0 - (MBOX_MAX_SCSI_CMDS-1) ARE RESERVED FOR 3456 // COMMANDS COMING FROM IO SUBSYSTEM (MID-LAYER) 3457 scb->sno = i + MBOX_MAX_SCSI_CMDS; 3458 3459 scb->scp = NULL; 3460 scb->state = SCB_FREE; 3461 scb->dma_direction = DMA_NONE; 3462 scb->dma_type = MRAID_DMA_NONE; 3463 scb->dev_channel = -1; 3464 scb->dev_target = -1; 3465 3466 // put scb in the free pool 3467 list_add_tail(&scb->list, &adapter->uscb_pool); 3468 } 3469 3470 adp.unique_id = adapter->unique_id; 3471 adp.drvr_type = DRVRTYPE_MBOX; 3472 adp.drvr_data = (unsigned long)adapter; 3473 adp.pdev = adapter->pdev; 3474 adp.issue_uioc = megaraid_mbox_mm_handler; 3475 adp.timeout = MBOX_RESET_WAIT + MBOX_RESET_EXT_WAIT; 3476 adp.max_kioc = MBOX_MAX_USER_CMDS; 3477 3478 if ((rval = mraid_mm_register_adp(&adp)) != 0) { 3479 3480 con_log(CL_ANN, (KERN_WARNING 3481 "megaraid mbox: did not register with CMM\n")); 3482 3483 kfree(adapter->uscb_list); 3484 } 3485 3486 return rval; 3487 } 3488 3489 3490 /** 3491 * megaraid_cmm_unregister - un-register with the management module 3492 * @adapter : HBA soft state 3493 * 3494 * Un-register with the management module. 3495 * FIXME: mgmt module must return failure for unregister if it has pending 3496 * commands in LLD. 3497 */ 3498 static int 3499 megaraid_cmm_unregister(adapter_t *adapter) 3500 { 3501 kfree(adapter->uscb_list); 3502 mraid_mm_unregister_adp(adapter->unique_id); 3503 return 0; 3504 } 3505 3506 3507 /** 3508 * megaraid_mbox_mm_handler - interface for CMM to issue commands to LLD 3509 * @drvr_data : LLD specific data 3510 * @kioc : CMM interface packet 3511 * @action : command action 3512 * 3513 * This routine is invoked whenever the Common Management Module (CMM) has a 3514 * command for us. The 'action' parameter specifies if this is a new command 3515 * or otherwise. 3516 */ 3517 static int 3518 megaraid_mbox_mm_handler(unsigned long drvr_data, uioc_t *kioc, uint32_t action) 3519 { 3520 adapter_t *adapter; 3521 3522 if (action != IOCTL_ISSUE) { 3523 con_log(CL_ANN, (KERN_WARNING 3524 "megaraid: unsupported management action:%#2x\n", 3525 action)); 3526 return (-ENOTSUPP); 3527 } 3528 3529 adapter = (adapter_t *)drvr_data; 3530 3531 // make sure this adapter is not being detached right now. 3532 if (atomic_read(&adapter->being_detached)) { 3533 con_log(CL_ANN, (KERN_WARNING 3534 "megaraid: reject management request, detaching\n")); 3535 return (-ENODEV); 3536 } 3537 3538 switch (kioc->opcode) { 3539 3540 case GET_ADAP_INFO: 3541 3542 kioc->status = gather_hbainfo(adapter, (mraid_hba_info_t *) 3543 (unsigned long)kioc->buf_vaddr); 3544 3545 kioc->done(kioc); 3546 3547 return kioc->status; 3548 3549 case MBOX_CMD: 3550 3551 return megaraid_mbox_mm_command(adapter, kioc); 3552 3553 default: 3554 kioc->status = (-EINVAL); 3555 kioc->done(kioc); 3556 return (-EINVAL); 3557 } 3558 3559 return 0; // not reached 3560 } 3561 3562 /** 3563 * megaraid_mbox_mm_command - issues commands routed through CMM 3564 * @adapter : HBA soft state 3565 * @kioc : management command packet 3566 * 3567 * Issues commands, which are routed through the management module. 3568 */ 3569 static int 3570 megaraid_mbox_mm_command(adapter_t *adapter, uioc_t *kioc) 3571 { 3572 struct list_head *head = &adapter->uscb_pool; 3573 mbox64_t *mbox64; 3574 uint8_t *raw_mbox; 3575 scb_t *scb; 3576 mbox_ccb_t *ccb; 3577 unsigned long flags; 3578 3579 // detach one scb from free pool 3580 spin_lock_irqsave(USER_FREE_LIST_LOCK(adapter), flags); 3581 3582 if (list_empty(head)) { // should never happen because of CMM 3583 3584 con_log(CL_ANN, (KERN_WARNING 3585 "megaraid mbox: bug in cmm handler, lost resources\n")); 3586 3587 spin_unlock_irqrestore(USER_FREE_LIST_LOCK(adapter), flags); 3588 3589 return (-EINVAL); 3590 } 3591 3592 scb = list_entry(head->next, scb_t, list); 3593 list_del_init(&scb->list); 3594 3595 spin_unlock_irqrestore(USER_FREE_LIST_LOCK(adapter), flags); 3596 3597 scb->state = SCB_ACTIVE; 3598 scb->dma_type = MRAID_DMA_NONE; 3599 scb->dma_direction = DMA_NONE; 3600 3601 ccb = (mbox_ccb_t *)scb->ccb; 3602 mbox64 = (mbox64_t *)(unsigned long)kioc->cmdbuf; 3603 raw_mbox = (uint8_t *)&mbox64->mbox32; 3604 3605 memcpy(ccb->mbox64, mbox64, sizeof(mbox64_t)); 3606 3607 scb->gp = (unsigned long)kioc; 3608 3609 /* 3610 * If it is a logdrv random delete operation, we have to wait till 3611 * there are no outstanding cmds at the fw and then issue it directly 3612 */ 3613 if (raw_mbox[0] == FC_DEL_LOGDRV && raw_mbox[2] == OP_DEL_LOGDRV) { 3614 3615 if (wait_till_fw_empty(adapter)) { 3616 con_log(CL_ANN, (KERN_NOTICE 3617 "megaraid mbox: LD delete, timed out\n")); 3618 3619 kioc->status = -ETIME; 3620 3621 scb->status = -1; 3622 3623 megaraid_mbox_mm_done(adapter, scb); 3624 3625 return (-ETIME); 3626 } 3627 3628 INIT_LIST_HEAD(&scb->list); 3629 3630 scb->state = SCB_ISSUED; 3631 if (mbox_post_cmd(adapter, scb) != 0) { 3632 3633 con_log(CL_ANN, (KERN_NOTICE 3634 "megaraid mbox: LD delete, mailbox busy\n")); 3635 3636 kioc->status = -EBUSY; 3637 3638 scb->status = -1; 3639 3640 megaraid_mbox_mm_done(adapter, scb); 3641 3642 return (-EBUSY); 3643 } 3644 3645 return 0; 3646 } 3647 3648 // put the command on the pending list and execute 3649 megaraid_mbox_runpendq(adapter, scb); 3650 3651 return 0; 3652 } 3653 3654 3655 static int 3656 wait_till_fw_empty(adapter_t *adapter) 3657 { 3658 unsigned long flags = 0; 3659 int i; 3660 3661 3662 /* 3663 * Set the quiescent flag to stop issuing cmds to FW. 3664 */ 3665 spin_lock_irqsave(&adapter->lock, flags); 3666 adapter->quiescent++; 3667 spin_unlock_irqrestore(&adapter->lock, flags); 3668 3669 /* 3670 * Wait till there are no more cmds outstanding at FW. Try for at most 3671 * 60 seconds 3672 */ 3673 for (i = 0; i < 60 && adapter->outstanding_cmds; i++) { 3674 con_log(CL_DLEVEL1, (KERN_INFO 3675 "megaraid: FW has %d pending commands\n", 3676 adapter->outstanding_cmds)); 3677 3678 msleep(1000); 3679 } 3680 3681 return adapter->outstanding_cmds; 3682 } 3683 3684 3685 /** 3686 * megaraid_mbox_mm_done - callback for CMM commands 3687 * @adapter : HBA soft state 3688 * @scb : completed command 3689 * 3690 * Callback routine for internal commands originated from the management 3691 * module. 3692 */ 3693 static void 3694 megaraid_mbox_mm_done(adapter_t *adapter, scb_t *scb) 3695 { 3696 uioc_t *kioc; 3697 mbox64_t *mbox64; 3698 uint8_t *raw_mbox; 3699 unsigned long flags; 3700 3701 kioc = (uioc_t *)scb->gp; 3702 mbox64 = (mbox64_t *)(unsigned long)kioc->cmdbuf; 3703 mbox64->mbox32.status = scb->status; 3704 raw_mbox = (uint8_t *)&mbox64->mbox32; 3705 3706 3707 // put scb in the free pool 3708 scb->state = SCB_FREE; 3709 scb->scp = NULL; 3710 3711 spin_lock_irqsave(USER_FREE_LIST_LOCK(adapter), flags); 3712 3713 list_add(&scb->list, &adapter->uscb_pool); 3714 3715 spin_unlock_irqrestore(USER_FREE_LIST_LOCK(adapter), flags); 3716 3717 // if a delete logical drive operation succeeded, restart the 3718 // controller 3719 if (raw_mbox[0] == FC_DEL_LOGDRV && raw_mbox[2] == OP_DEL_LOGDRV) { 3720 3721 adapter->quiescent--; 3722 3723 megaraid_mbox_runpendq(adapter, NULL); 3724 } 3725 3726 kioc->done(kioc); 3727 3728 return; 3729 } 3730 3731 3732 /** 3733 * gather_hbainfo - HBA characteristics for the applications 3734 * @adapter : HBA soft state 3735 * @hinfo : pointer to the caller's host info strucuture 3736 */ 3737 static int 3738 gather_hbainfo(adapter_t *adapter, mraid_hba_info_t *hinfo) 3739 { 3740 hinfo->pci_vendor_id = adapter->pdev->vendor; 3741 hinfo->pci_device_id = adapter->pdev->device; 3742 hinfo->subsys_vendor_id = adapter->pdev->subsystem_vendor; 3743 hinfo->subsys_device_id = adapter->pdev->subsystem_device; 3744 3745 hinfo->pci_bus = adapter->pdev->bus->number; 3746 hinfo->pci_dev_fn = adapter->pdev->devfn; 3747 hinfo->pci_slot = PCI_SLOT(adapter->pdev->devfn); 3748 hinfo->irq = adapter->host->irq; 3749 hinfo->baseport = ADAP2RAIDDEV(adapter)->baseport; 3750 3751 hinfo->unique_id = (hinfo->pci_bus << 8) | adapter->pdev->devfn; 3752 hinfo->host_no = adapter->host->host_no; 3753 3754 return 0; 3755 } 3756 3757 /* 3758 * END: Interface for the common management module 3759 */ 3760 3761 3762 3763 /** 3764 * megaraid_sysfs_alloc_resources - allocate sysfs related resources 3765 * @adapter : controller's soft state 3766 * 3767 * Allocate packets required to issue FW calls whenever the sysfs attributes 3768 * are read. These attributes would require up-to-date information from the 3769 * FW. Also set up resources for mutual exclusion to share these resources and 3770 * the wait queue. 3771 * 3772 * Return 0 on success. 3773 * Return -ERROR_CODE on failure. 3774 */ 3775 static int 3776 megaraid_sysfs_alloc_resources(adapter_t *adapter) 3777 { 3778 mraid_device_t *raid_dev = ADAP2RAIDDEV(adapter); 3779 int rval = 0; 3780 3781 raid_dev->sysfs_uioc = kmalloc(sizeof(uioc_t), GFP_KERNEL); 3782 3783 raid_dev->sysfs_mbox64 = kmalloc(sizeof(mbox64_t), GFP_KERNEL); 3784 3785 raid_dev->sysfs_buffer = dma_alloc_coherent(&adapter->pdev->dev, 3786 PAGE_SIZE, &raid_dev->sysfs_buffer_dma, GFP_KERNEL); 3787 3788 if (!raid_dev->sysfs_uioc || !raid_dev->sysfs_mbox64 || 3789 !raid_dev->sysfs_buffer) { 3790 3791 con_log(CL_ANN, (KERN_WARNING 3792 "megaraid: out of memory, %s %d\n", __func__, 3793 __LINE__)); 3794 3795 rval = -ENOMEM; 3796 3797 megaraid_sysfs_free_resources(adapter); 3798 } 3799 3800 mutex_init(&raid_dev->sysfs_mtx); 3801 3802 init_waitqueue_head(&raid_dev->sysfs_wait_q); 3803 3804 return rval; 3805 } 3806 3807 3808 /** 3809 * megaraid_sysfs_free_resources - free sysfs related resources 3810 * @adapter : controller's soft state 3811 * 3812 * Free packets allocated for sysfs FW commands 3813 */ 3814 static void 3815 megaraid_sysfs_free_resources(adapter_t *adapter) 3816 { 3817 mraid_device_t *raid_dev = ADAP2RAIDDEV(adapter); 3818 3819 kfree(raid_dev->sysfs_uioc); 3820 kfree(raid_dev->sysfs_mbox64); 3821 3822 if (raid_dev->sysfs_buffer) { 3823 dma_free_coherent(&adapter->pdev->dev, PAGE_SIZE, 3824 raid_dev->sysfs_buffer, raid_dev->sysfs_buffer_dma); 3825 } 3826 } 3827 3828 3829 /** 3830 * megaraid_sysfs_get_ldmap_done - callback for get ldmap 3831 * @uioc : completed packet 3832 * 3833 * Callback routine called in the ISR/tasklet context for get ldmap call 3834 */ 3835 static void 3836 megaraid_sysfs_get_ldmap_done(uioc_t *uioc) 3837 { 3838 adapter_t *adapter = (adapter_t *)uioc->buf_vaddr; 3839 mraid_device_t *raid_dev = ADAP2RAIDDEV(adapter); 3840 3841 uioc->status = 0; 3842 3843 wake_up(&raid_dev->sysfs_wait_q); 3844 } 3845 3846 /** 3847 * megaraid_sysfs_get_ldmap_timeout - timeout handling for get ldmap 3848 * @t : timed out timer 3849 * 3850 * Timeout routine to recover and return to application, in case the adapter 3851 * has stopped responding. A timeout of 60 seconds for this command seems like 3852 * a good value. 3853 */ 3854 static void 3855 megaraid_sysfs_get_ldmap_timeout(struct timer_list *t) 3856 { 3857 struct uioc_timeout *timeout = from_timer(timeout, t, timer); 3858 uioc_t *uioc = timeout->uioc; 3859 adapter_t *adapter = (adapter_t *)uioc->buf_vaddr; 3860 mraid_device_t *raid_dev = ADAP2RAIDDEV(adapter); 3861 3862 uioc->status = -ETIME; 3863 3864 wake_up(&raid_dev->sysfs_wait_q); 3865 } 3866 3867 3868 /** 3869 * megaraid_sysfs_get_ldmap - get update logical drive map 3870 * @adapter : controller's soft state 3871 * 3872 * This routine will be called whenever user reads the logical drive 3873 * attributes, go get the current logical drive mapping table from the 3874 * firmware. We use the management API's to issue commands to the controller. 3875 * 3876 * NOTE: The commands issuance functionality is not generalized and 3877 * implemented in context of "get ld map" command only. If required, the 3878 * command issuance logical can be trivially pulled out and implemented as a 3879 * standalone library. For now, this should suffice since there is no other 3880 * user of this interface. 3881 * 3882 * Return 0 on success. 3883 * Return -1 on failure. 3884 */ 3885 static int 3886 megaraid_sysfs_get_ldmap(adapter_t *adapter) 3887 { 3888 mraid_device_t *raid_dev = ADAP2RAIDDEV(adapter); 3889 uioc_t *uioc; 3890 mbox64_t *mbox64; 3891 mbox_t *mbox; 3892 char *raw_mbox; 3893 struct uioc_timeout timeout; 3894 caddr_t ldmap; 3895 int rval = 0; 3896 3897 /* 3898 * Allow only one read at a time to go through the sysfs attributes 3899 */ 3900 mutex_lock(&raid_dev->sysfs_mtx); 3901 3902 uioc = raid_dev->sysfs_uioc; 3903 mbox64 = raid_dev->sysfs_mbox64; 3904 ldmap = raid_dev->sysfs_buffer; 3905 3906 memset(uioc, 0, sizeof(uioc_t)); 3907 memset(mbox64, 0, sizeof(mbox64_t)); 3908 memset(ldmap, 0, sizeof(raid_dev->curr_ldmap)); 3909 3910 mbox = &mbox64->mbox32; 3911 raw_mbox = (char *)mbox; 3912 uioc->cmdbuf = (uint64_t)(unsigned long)mbox64; 3913 uioc->buf_vaddr = (caddr_t)adapter; 3914 uioc->status = -ENODATA; 3915 uioc->done = megaraid_sysfs_get_ldmap_done; 3916 3917 /* 3918 * Prepare the mailbox packet to get the current logical drive mapping 3919 * table 3920 */ 3921 mbox->xferaddr = (uint32_t)raid_dev->sysfs_buffer_dma; 3922 3923 raw_mbox[0] = FC_DEL_LOGDRV; 3924 raw_mbox[2] = OP_GET_LDID_MAP; 3925 3926 /* 3927 * Setup a timer to recover from a non-responding controller 3928 */ 3929 timeout.uioc = uioc; 3930 timer_setup_on_stack(&timeout.timer, 3931 megaraid_sysfs_get_ldmap_timeout, 0); 3932 3933 timeout.timer.expires = jiffies + 60 * HZ; 3934 add_timer(&timeout.timer); 3935 3936 /* 3937 * Send the command to the firmware 3938 */ 3939 rval = megaraid_mbox_mm_command(adapter, uioc); 3940 3941 if (rval == 0) { // command successfully issued 3942 wait_event(raid_dev->sysfs_wait_q, (uioc->status != -ENODATA)); 3943 3944 /* 3945 * Check if the command timed out 3946 */ 3947 if (uioc->status == -ETIME) { 3948 con_log(CL_ANN, (KERN_NOTICE 3949 "megaraid: sysfs get ld map timed out\n")); 3950 3951 rval = -ETIME; 3952 } 3953 else { 3954 rval = mbox->status; 3955 } 3956 3957 if (rval == 0) { 3958 memcpy(raid_dev->curr_ldmap, ldmap, 3959 sizeof(raid_dev->curr_ldmap)); 3960 } 3961 else { 3962 con_log(CL_ANN, (KERN_NOTICE 3963 "megaraid: get ld map failed with %x\n", rval)); 3964 } 3965 } 3966 else { 3967 con_log(CL_ANN, (KERN_NOTICE 3968 "megaraid: could not issue ldmap command:%x\n", rval)); 3969 } 3970 3971 3972 del_timer_sync(&timeout.timer); 3973 destroy_timer_on_stack(&timeout.timer); 3974 3975 mutex_unlock(&raid_dev->sysfs_mtx); 3976 3977 return rval; 3978 } 3979 3980 3981 /** 3982 * megaraid_sysfs_show_app_hndl - display application handle for this adapter 3983 * @cdev : class device object representation for the host 3984 * @buf : buffer to send data to 3985 * 3986 * Display the handle used by the applications while executing management 3987 * tasks on the adapter. We invoke a management module API to get the adapter 3988 * handle, since we do not interface with applications directly. 3989 */ 3990 static ssize_t 3991 megaraid_sysfs_show_app_hndl(struct device *dev, struct device_attribute *attr, 3992 char *buf) 3993 { 3994 struct Scsi_Host *shost = class_to_shost(dev); 3995 adapter_t *adapter = (adapter_t *)SCSIHOST2ADAP(shost); 3996 uint32_t app_hndl; 3997 3998 app_hndl = mraid_mm_adapter_app_handle(adapter->unique_id); 3999 4000 return snprintf(buf, 8, "%u\n", app_hndl); 4001 } 4002 4003 4004 /** 4005 * megaraid_sysfs_show_ldnum - display the logical drive number for this device 4006 * @dev : device object representation for the scsi device 4007 * @attr : device attribute to show 4008 * @buf : buffer to send data to 4009 * 4010 * Display the logical drive number for the device in question, if it a valid 4011 * logical drive. For physical devices, "-1" is returned. 4012 * 4013 * The logical drive number is displayed in following format: 4014 * 4015 * <SCSI ID> <LD NUM> <LD STICKY ID> <APP ADAPTER HANDLE> 4016 * 4017 * <int> <int> <int> <int> 4018 */ 4019 static ssize_t 4020 megaraid_sysfs_show_ldnum(struct device *dev, struct device_attribute *attr, char *buf) 4021 { 4022 struct scsi_device *sdev = to_scsi_device(dev); 4023 adapter_t *adapter = (adapter_t *)SCSIHOST2ADAP(sdev->host); 4024 mraid_device_t *raid_dev = ADAP2RAIDDEV(adapter); 4025 int scsi_id = -1; 4026 int logical_drv = -1; 4027 int ldid_map = -1; 4028 uint32_t app_hndl = 0; 4029 int mapped_sdev_id; 4030 int rval; 4031 int i; 4032 4033 if (raid_dev->random_del_supported && 4034 MRAID_IS_LOGICAL_SDEV(adapter, sdev)) { 4035 4036 rval = megaraid_sysfs_get_ldmap(adapter); 4037 if (rval == 0) { 4038 4039 for (i = 0; i < MAX_LOGICAL_DRIVES_40LD; i++) { 4040 4041 mapped_sdev_id = sdev->id; 4042 4043 if (sdev->id > adapter->init_id) { 4044 mapped_sdev_id -= 1; 4045 } 4046 4047 if (raid_dev->curr_ldmap[i] == mapped_sdev_id) { 4048 4049 scsi_id = sdev->id; 4050 4051 logical_drv = i; 4052 4053 ldid_map = raid_dev->curr_ldmap[i]; 4054 4055 app_hndl = mraid_mm_adapter_app_handle( 4056 adapter->unique_id); 4057 4058 break; 4059 } 4060 } 4061 } 4062 else { 4063 con_log(CL_ANN, (KERN_NOTICE 4064 "megaraid: sysfs get ld map failed: %x\n", 4065 rval)); 4066 } 4067 } 4068 4069 return snprintf(buf, 36, "%d %d %d %d\n", scsi_id, logical_drv, 4070 ldid_map, app_hndl); 4071 } 4072 4073 4074 /* 4075 * END: Mailbox Low Level Driver 4076 */ 4077 module_init(megaraid_init); 4078 module_exit(megaraid_exit); 4079 4080 /* vim: set ts=8 sw=8 tw=78 ai si: */ 4081