1/* 2 * 3 * Linux MegaRAID device driver 4 * 5 * Copyright (c) 2003-2004 LSI Logic Corporation. 6 * 7 * This program is free software; you can redistribute it and/or 8 * modify it under the terms of the GNU General Public License 9 * as published by the Free Software Foundation; either version 10 * 2 of the License, or (at your option) any later version. 11 * 12 * FILE : megaraid_mbox.c 13 * Version : v2.20.5.1 (Nov 16 2006) 14 * 15 * Authors: 16 * Atul Mukker <Atul.Mukker@lsi.com> 17 * Sreenivas Bagalkote <Sreenivas.Bagalkote@lsi.com> 18 * Manoj Jose <Manoj.Jose@lsi.com> 19 * Seokmann Ju 20 * 21 * List of supported controllers 22 * 23 * OEM Product Name VID DID SSVID SSID 24 * --- ------------ --- --- ---- ---- 25 * Dell PERC3/QC 101E 1960 1028 0471 26 * Dell PERC3/DC 101E 1960 1028 0493 27 * Dell PERC3/SC 101E 1960 1028 0475 28 * Dell PERC3/Di 1028 1960 1028 0123 29 * Dell PERC4/SC 1000 1960 1028 0520 30 * Dell PERC4/DC 1000 1960 1028 0518 31 * Dell PERC4/QC 1000 0407 1028 0531 32 * Dell PERC4/Di 1028 000F 1028 014A 33 * Dell PERC 4e/Si 1028 0013 1028 016c 34 * Dell PERC 4e/Di 1028 0013 1028 016d 35 * Dell PERC 4e/Di 1028 0013 1028 016e 36 * Dell PERC 4e/Di 1028 0013 1028 016f 37 * Dell PERC 4e/Di 1028 0013 1028 0170 38 * Dell PERC 4e/DC 1000 0408 1028 0002 39 * Dell PERC 4e/SC 1000 0408 1028 0001 40 * 41 * 42 * LSI MegaRAID SCSI 320-0 1000 1960 1000 A520 43 * LSI MegaRAID SCSI 320-1 1000 1960 1000 0520 44 * LSI MegaRAID SCSI 320-2 1000 1960 1000 0518 45 * LSI MegaRAID SCSI 320-0X 1000 0407 1000 0530 46 * LSI MegaRAID SCSI 320-2X 1000 0407 1000 0532 47 * LSI MegaRAID SCSI 320-4X 1000 0407 1000 0531 48 * LSI MegaRAID SCSI 320-1E 1000 0408 1000 0001 49 * LSI MegaRAID SCSI 320-2E 1000 0408 1000 0002 50 * LSI MegaRAID SATA 150-4 1000 1960 1000 4523 51 * LSI MegaRAID SATA 150-6 1000 1960 1000 0523 52 * LSI MegaRAID SATA 300-4X 1000 0409 1000 3004 53 * LSI MegaRAID SATA 300-8X 1000 0409 1000 3008 54 * 55 * INTEL RAID Controller SRCU42X 1000 0407 8086 0532 56 * INTEL RAID Controller SRCS16 1000 1960 8086 0523 57 * INTEL RAID Controller SRCU42E 1000 0408 8086 0002 58 * INTEL RAID Controller SRCZCRX 1000 0407 8086 0530 59 * INTEL RAID Controller SRCS28X 1000 0409 8086 3008 60 * INTEL RAID Controller SROMBU42E 1000 0408 8086 3431 61 * INTEL RAID Controller SROMBU42E 1000 0408 8086 3499 62 * INTEL RAID Controller SRCU51L 1000 1960 8086 0520 63 * 64 * FSC MegaRAID PCI Express ROMB 1000 0408 1734 1065 65 * 66 * ACER MegaRAID ROMB-2E 1000 0408 1025 004D 67 * 68 * NEC MegaRAID PCI Express ROMB 1000 0408 1033 8287 69 * 70 * For history of changes, see Documentation/ChangeLog.megaraid 71 */ 72 73#include "megaraid_mbox.h" 74 75static int megaraid_init(void); 76static void megaraid_exit(void); 77 78static int megaraid_probe_one(struct pci_dev*, const struct pci_device_id *); 79static void megaraid_detach_one(struct pci_dev *); 80static void megaraid_mbox_shutdown(struct pci_dev *); 81 82static int megaraid_io_attach(adapter_t *); 83static void megaraid_io_detach(adapter_t *); 84 85static int megaraid_init_mbox(adapter_t *); 86static void megaraid_fini_mbox(adapter_t *); 87 88static int megaraid_alloc_cmd_packets(adapter_t *); 89static void megaraid_free_cmd_packets(adapter_t *); 90 91static int megaraid_mbox_setup_dma_pools(adapter_t *); 92static void megaraid_mbox_teardown_dma_pools(adapter_t *); 93 94static int megaraid_sysfs_alloc_resources(adapter_t *); 95static void megaraid_sysfs_free_resources(adapter_t *); 96 97static int megaraid_abort_handler(struct scsi_cmnd *); 98static int megaraid_reset_handler(struct scsi_cmnd *); 99 100static int mbox_post_sync_cmd(adapter_t *, uint8_t []); 101static int mbox_post_sync_cmd_fast(adapter_t *, uint8_t []); 102static int megaraid_busywait_mbox(mraid_device_t *); 103static int megaraid_mbox_product_info(adapter_t *); 104static int megaraid_mbox_extended_cdb(adapter_t *); 105static int megaraid_mbox_support_ha(adapter_t *, uint16_t *); 106static int megaraid_mbox_support_random_del(adapter_t *); 107static int megaraid_mbox_get_max_sg(adapter_t *); 108static void megaraid_mbox_enum_raid_scsi(adapter_t *); 109static void megaraid_mbox_flush_cache(adapter_t *); 110static int megaraid_mbox_fire_sync_cmd(adapter_t *); 111 112static void megaraid_mbox_display_scb(adapter_t *, scb_t *); 113static void megaraid_mbox_setup_device_map(adapter_t *); 114 115static int megaraid_queue_command(struct scsi_cmnd *, 116 void (*)(struct scsi_cmnd *)); 117static scb_t *megaraid_mbox_build_cmd(adapter_t *, struct scsi_cmnd *, int *); 118static void megaraid_mbox_runpendq(adapter_t *, scb_t *); 119static void megaraid_mbox_prepare_pthru(adapter_t *, scb_t *, 120 struct scsi_cmnd *); 121static void megaraid_mbox_prepare_epthru(adapter_t *, scb_t *, 122 struct scsi_cmnd *); 123 124static irqreturn_t megaraid_isr(int, void *); 125 126static void megaraid_mbox_dpc(unsigned long); 127 128static ssize_t megaraid_sysfs_show_app_hndl(struct class_device *, char *); 129static ssize_t megaraid_sysfs_show_ldnum(struct device *, struct device_attribute *attr, char *); 130 131static int megaraid_cmm_register(adapter_t *); 132static int megaraid_cmm_unregister(adapter_t *); 133static int megaraid_mbox_mm_handler(unsigned long, uioc_t *, uint32_t); 134static int megaraid_mbox_mm_command(adapter_t *, uioc_t *); 135static void megaraid_mbox_mm_done(adapter_t *, scb_t *); 136static int gather_hbainfo(adapter_t *, mraid_hba_info_t *); 137static int wait_till_fw_empty(adapter_t *); 138 139 140 141MODULE_AUTHOR("megaraidlinux@lsi.com"); 142MODULE_DESCRIPTION("LSI Logic MegaRAID Mailbox Driver"); 143MODULE_LICENSE("GPL"); 144MODULE_VERSION(MEGARAID_VERSION); 145 146/* 147 * ### modules parameters for driver ### 148 */ 149 150/* 151 * Set to enable driver to expose unconfigured disk to kernel 152 */ 153static int megaraid_expose_unconf_disks = 0; 154module_param_named(unconf_disks, megaraid_expose_unconf_disks, int, 0); 155MODULE_PARM_DESC(unconf_disks, 156 "Set to expose unconfigured disks to kernel (default=0)"); 157 158/* 159 * driver wait time if the adapter's mailbox is busy 160 */ 161static unsigned int max_mbox_busy_wait = MBOX_BUSY_WAIT; 162module_param_named(busy_wait, max_mbox_busy_wait, int, 0); 163MODULE_PARM_DESC(busy_wait, 164 "Max wait for mailbox in microseconds if busy (default=10)"); 165 166/* 167 * number of sectors per IO command 168 */ 169static unsigned int megaraid_max_sectors = MBOX_MAX_SECTORS; 170module_param_named(max_sectors, megaraid_max_sectors, int, 0); 171MODULE_PARM_DESC(max_sectors, 172 "Maximum number of sectors per IO command (default=128)"); 173 174/* 175 * number of commands per logical unit 176 */ 177static unsigned int megaraid_cmd_per_lun = MBOX_DEF_CMD_PER_LUN; 178module_param_named(cmd_per_lun, megaraid_cmd_per_lun, int, 0); 179MODULE_PARM_DESC(cmd_per_lun, 180 "Maximum number of commands per logical unit (default=64)"); 181 182 183/* 184 * Fast driver load option, skip scanning for physical devices during load. 185 * This would result in non-disk devices being skipped during driver load 186 * time. These can be later added though, using /proc/scsi/scsi 187 */ 188static unsigned int megaraid_fast_load = 0; 189module_param_named(fast_load, megaraid_fast_load, int, 0); 190MODULE_PARM_DESC(fast_load, 191 "Faster loading of the driver, skips physical devices! (default=0)"); 192 193 194/* 195 * mraid_debug level - threshold for amount of information to be displayed by 196 * the driver. This level can be changed through modules parameters, ioctl or 197 * sysfs/proc interface. By default, print the announcement messages only. 198 */ 199int mraid_debug_level = CL_ANN; 200module_param_named(debug_level, mraid_debug_level, int, 0); 201MODULE_PARM_DESC(debug_level, "Debug level for driver (default=0)"); 202 203/* 204 * ### global data ### 205 */ 206static uint8_t megaraid_mbox_version[8] = 207 { 0x02, 0x20, 0x04, 0x06, 3, 7, 20, 5 }; 208 209 210/* 211 * PCI table for all supported controllers. 212 */ 213static struct pci_device_id pci_id_table_g[] = { 214 { 215 PCI_VENDOR_ID_DELL, 216 PCI_DEVICE_ID_PERC4_DI_DISCOVERY, 217 PCI_VENDOR_ID_DELL, 218 PCI_SUBSYS_ID_PERC4_DI_DISCOVERY, 219 }, 220 { 221 PCI_VENDOR_ID_LSI_LOGIC, 222 PCI_DEVICE_ID_PERC4_SC, 223 PCI_VENDOR_ID_DELL, 224 PCI_SUBSYS_ID_PERC4_SC, 225 }, 226 { 227 PCI_VENDOR_ID_LSI_LOGIC, 228 PCI_DEVICE_ID_PERC4_DC, 229 PCI_VENDOR_ID_DELL, 230 PCI_SUBSYS_ID_PERC4_DC, 231 }, 232 { 233 PCI_VENDOR_ID_LSI_LOGIC, 234 PCI_DEVICE_ID_VERDE, 235 PCI_ANY_ID, 236 PCI_ANY_ID, 237 }, 238 { 239 PCI_VENDOR_ID_DELL, 240 PCI_DEVICE_ID_PERC4_DI_EVERGLADES, 241 PCI_VENDOR_ID_DELL, 242 PCI_SUBSYS_ID_PERC4_DI_EVERGLADES, 243 }, 244 { 245 PCI_VENDOR_ID_DELL, 246 PCI_DEVICE_ID_PERC4E_SI_BIGBEND, 247 PCI_VENDOR_ID_DELL, 248 PCI_SUBSYS_ID_PERC4E_SI_BIGBEND, 249 }, 250 { 251 PCI_VENDOR_ID_DELL, 252 PCI_DEVICE_ID_PERC4E_DI_KOBUK, 253 PCI_VENDOR_ID_DELL, 254 PCI_SUBSYS_ID_PERC4E_DI_KOBUK, 255 }, 256 { 257 PCI_VENDOR_ID_DELL, 258 PCI_DEVICE_ID_PERC4E_DI_CORVETTE, 259 PCI_VENDOR_ID_DELL, 260 PCI_SUBSYS_ID_PERC4E_DI_CORVETTE, 261 }, 262 { 263 PCI_VENDOR_ID_DELL, 264 PCI_DEVICE_ID_PERC4E_DI_EXPEDITION, 265 PCI_VENDOR_ID_DELL, 266 PCI_SUBSYS_ID_PERC4E_DI_EXPEDITION, 267 }, 268 { 269 PCI_VENDOR_ID_DELL, 270 PCI_DEVICE_ID_PERC4E_DI_GUADALUPE, 271 PCI_VENDOR_ID_DELL, 272 PCI_SUBSYS_ID_PERC4E_DI_GUADALUPE, 273 }, 274 { 275 PCI_VENDOR_ID_LSI_LOGIC, 276 PCI_DEVICE_ID_DOBSON, 277 PCI_ANY_ID, 278 PCI_ANY_ID, 279 }, 280 { 281 PCI_VENDOR_ID_AMI, 282 PCI_DEVICE_ID_AMI_MEGARAID3, 283 PCI_ANY_ID, 284 PCI_ANY_ID, 285 }, 286 { 287 PCI_VENDOR_ID_LSI_LOGIC, 288 PCI_DEVICE_ID_AMI_MEGARAID3, 289 PCI_ANY_ID, 290 PCI_ANY_ID, 291 }, 292 { 293 PCI_VENDOR_ID_LSI_LOGIC, 294 PCI_DEVICE_ID_LINDSAY, 295 PCI_ANY_ID, 296 PCI_ANY_ID, 297 }, 298 {0} /* Terminating entry */ 299}; 300MODULE_DEVICE_TABLE(pci, pci_id_table_g); 301 302 303static struct pci_driver megaraid_pci_driver_g = { 304 .name = "megaraid", 305 .id_table = pci_id_table_g, 306 .probe = megaraid_probe_one, 307 .remove = __devexit_p(megaraid_detach_one), 308 .shutdown = megaraid_mbox_shutdown, 309}; 310 311 312 313// definitions for the device attributes for exporting logical drive number 314// for a scsi address (Host, Channel, Id, Lun) 315 316CLASS_DEVICE_ATTR(megaraid_mbox_app_hndl, S_IRUSR, megaraid_sysfs_show_app_hndl, 317 NULL); 318 319// Host template initializer for megaraid mbox sysfs device attributes 320static struct class_device_attribute *megaraid_shost_attrs[] = { 321 &class_device_attr_megaraid_mbox_app_hndl, 322 NULL, 323}; 324 325 326DEVICE_ATTR(megaraid_mbox_ld, S_IRUSR, megaraid_sysfs_show_ldnum, NULL); 327 328// Host template initializer for megaraid mbox sysfs device attributes 329static struct device_attribute *megaraid_sdev_attrs[] = { 330 &dev_attr_megaraid_mbox_ld, 331 NULL, 332}; 333 334/** 335 * megaraid_change_queue_depth - Change the device's queue depth 336 * @sdev: scsi device struct 337 * @qdepth: depth to set 338 * 339 * Return value: 340 * actual depth set 341 */ 342static int megaraid_change_queue_depth(struct scsi_device *sdev, int qdepth) 343{ 344 if (qdepth > MBOX_MAX_SCSI_CMDS) 345 qdepth = MBOX_MAX_SCSI_CMDS; 346 scsi_adjust_queue_depth(sdev, 0, qdepth); 347 return sdev->queue_depth; 348} 349 350/* 351 * Scsi host template for megaraid unified driver 352 */ 353static struct scsi_host_template megaraid_template_g = { 354 .module = THIS_MODULE, 355 .name = "LSI Logic MegaRAID driver", 356 .proc_name = "megaraid", 357 .queuecommand = megaraid_queue_command, 358 .eh_abort_handler = megaraid_abort_handler, 359 .eh_device_reset_handler = megaraid_reset_handler, 360 .eh_bus_reset_handler = megaraid_reset_handler, 361 .eh_host_reset_handler = megaraid_reset_handler, 362 .change_queue_depth = megaraid_change_queue_depth, 363 .use_clustering = ENABLE_CLUSTERING, 364 .sdev_attrs = megaraid_sdev_attrs, 365 .shost_attrs = megaraid_shost_attrs, 366}; 367 368 369/** 370 * megaraid_init - module load hook 371 * 372 * We register ourselves as hotplug enabled module and let PCI subsystem 373 * discover our adapters. 374 */ 375static int __init 376megaraid_init(void) 377{ 378 int rval; 379 380 // Announce the driver version 381 con_log(CL_ANN, (KERN_INFO "megaraid: %s %s\n", MEGARAID_VERSION, 382 MEGARAID_EXT_VERSION)); 383 384 // check validity of module parameters 385 if (megaraid_cmd_per_lun > MBOX_MAX_SCSI_CMDS) { 386 387 con_log(CL_ANN, (KERN_WARNING 388 "megaraid mailbox: max commands per lun reset to %d\n", 389 MBOX_MAX_SCSI_CMDS)); 390 391 megaraid_cmd_per_lun = MBOX_MAX_SCSI_CMDS; 392 } 393 394 395 // register as a PCI hot-plug driver module 396 rval = pci_register_driver(&megaraid_pci_driver_g); 397 if (rval < 0) { 398 con_log(CL_ANN, (KERN_WARNING 399 "megaraid: could not register hotplug support.\n")); 400 } 401 402 return rval; 403} 404 405 406/** 407 * megaraid_exit - driver unload entry point 408 * 409 * We simply unwrap the megaraid_init routine here. 410 */ 411static void __exit 412megaraid_exit(void) 413{ 414 con_log(CL_DLEVEL1, (KERN_NOTICE "megaraid: unloading framework\n")); 415 416 // unregister as PCI hotplug driver 417 pci_unregister_driver(&megaraid_pci_driver_g); 418 419 return; 420} 421 422 423/** 424 * megaraid_probe_one - PCI hotplug entry point 425 * @pdev : handle to this controller's PCI configuration space 426 * @id : pci device id of the class of controllers 427 * 428 * This routine should be called whenever a new adapter is detected by the 429 * PCI hotplug susbsytem. 430 */ 431static int __devinit 432megaraid_probe_one(struct pci_dev *pdev, const struct pci_device_id *id) 433{ 434 adapter_t *adapter; 435 436 437 // detected a new controller 438 con_log(CL_ANN, (KERN_INFO 439 "megaraid: probe new device %#4.04x:%#4.04x:%#4.04x:%#4.04x: ", 440 pdev->vendor, pdev->device, pdev->subsystem_vendor, 441 pdev->subsystem_device)); 442 443 con_log(CL_ANN, ("bus %d:slot %d:func %d\n", pdev->bus->number, 444 PCI_SLOT(pdev->devfn), PCI_FUNC(pdev->devfn))); 445 446 if (pci_enable_device(pdev)) { 447 con_log(CL_ANN, (KERN_WARNING 448 "megaraid: pci_enable_device failed\n")); 449 450 return -ENODEV; 451 } 452 453 // Enable bus-mastering on this controller 454 pci_set_master(pdev); 455 456 // Allocate the per driver initialization structure 457 adapter = kmalloc(sizeof(adapter_t), GFP_KERNEL); 458 459 if (adapter == NULL) { 460 con_log(CL_ANN, (KERN_WARNING 461 "megaraid: out of memory, %s %d.\n", __FUNCTION__, __LINE__)); 462 463 goto out_probe_one; 464 } 465 memset(adapter, 0, sizeof(adapter_t)); 466 467 468 // set up PCI related soft state and other pre-known parameters 469 adapter->unique_id = pdev->bus->number << 8 | pdev->devfn; 470 adapter->irq = pdev->irq; 471 adapter->pdev = pdev; 472 473 atomic_set(&adapter->being_detached, 0); 474 475 // Setup the default DMA mask. This would be changed later on 476 // depending on hardware capabilities 477 if (pci_set_dma_mask(adapter->pdev, DMA_32BIT_MASK) != 0) { 478 479 con_log(CL_ANN, (KERN_WARNING 480 "megaraid: pci_set_dma_mask failed:%d\n", __LINE__)); 481 482 goto out_free_adapter; 483 } 484 485 486 // Initialize the synchronization lock for kernel and LLD 487 spin_lock_init(&adapter->lock); 488 489 // Initialize the command queues: the list of free SCBs and the list 490 // of pending SCBs. 491 INIT_LIST_HEAD(&adapter->kscb_pool); 492 spin_lock_init(SCSI_FREE_LIST_LOCK(adapter)); 493 494 INIT_LIST_HEAD(&adapter->pend_list); 495 spin_lock_init(PENDING_LIST_LOCK(adapter)); 496 497 INIT_LIST_HEAD(&adapter->completed_list); 498 spin_lock_init(COMPLETED_LIST_LOCK(adapter)); 499 500 501 // Start the mailbox based controller 502 if (megaraid_init_mbox(adapter) != 0) { 503 con_log(CL_ANN, (KERN_WARNING 504 "megaraid: maibox adapter did not initialize\n")); 505 506 goto out_free_adapter; 507 } 508 509 // Register with LSI Common Management Module 510 if (megaraid_cmm_register(adapter) != 0) { 511 512 con_log(CL_ANN, (KERN_WARNING 513 "megaraid: could not register with management module\n")); 514 515 goto out_fini_mbox; 516 } 517 518 // setup adapter handle in PCI soft state 519 pci_set_drvdata(pdev, adapter); 520 521 // attach with scsi mid-layer 522 if (megaraid_io_attach(adapter) != 0) { 523 524 con_log(CL_ANN, (KERN_WARNING "megaraid: io attach failed\n")); 525 526 goto out_cmm_unreg; 527 } 528 529 return 0; 530 531out_cmm_unreg: 532 pci_set_drvdata(pdev, NULL); 533 megaraid_cmm_unregister(adapter); 534out_fini_mbox: 535 megaraid_fini_mbox(adapter); 536out_free_adapter: 537 kfree(adapter); 538out_probe_one: 539 pci_disable_device(pdev); 540 541 return -ENODEV; 542} 543 544 545/** 546 * megaraid_detach_one - release framework resources and call LLD release routine 547 * @pdev : handle for our PCI cofiguration space 548 * 549 * This routine is called during driver unload. We free all the allocated 550 * resources and call the corresponding LLD so that it can also release all 551 * its resources. 552 * 553 * This routine is also called from the PCI hotplug system. 554 */ 555static void 556megaraid_detach_one(struct pci_dev *pdev) 557{ 558 adapter_t *adapter; 559 struct Scsi_Host *host; 560 561 562 // Start a rollback on this adapter 563 adapter = pci_get_drvdata(pdev); 564 565 if (!adapter) { 566 con_log(CL_ANN, (KERN_CRIT 567 "megaraid: Invalid detach on %#4.04x:%#4.04x:%#4.04x:%#4.04x\n", 568 pdev->vendor, pdev->device, pdev->subsystem_vendor, 569 pdev->subsystem_device)); 570 571 return; 572 } 573 else { 574 con_log(CL_ANN, (KERN_NOTICE 575 "megaraid: detaching device %#4.04x:%#4.04x:%#4.04x:%#4.04x\n", 576 pdev->vendor, pdev->device, pdev->subsystem_vendor, 577 pdev->subsystem_device)); 578 } 579 580 581 host = adapter->host; 582 583 // do not allow any more requests from the management module for this 584 // adapter. 585 // pending with us? 586 atomic_set(&adapter->being_detached, 1); 587 588 // detach from the IO sub-system 589 megaraid_io_detach(adapter); 590 591 // reset the device state in the PCI structure. We check this 592 // condition when we enter here. If the device state is NULL, 593 // that would mean the device has already been removed 594 pci_set_drvdata(pdev, NULL); 595 596 // Unregister from common management module 597 // 598 // is a command pending with LLD or not. 599 megaraid_cmm_unregister(adapter); 600 601 // finalize the mailbox based controller and release all resources 602 megaraid_fini_mbox(adapter); 603 604 kfree(adapter); 605 606 scsi_host_put(host); 607 608 pci_disable_device(pdev); 609 610 return; 611} 612 613 614/** 615 * megaraid_mbox_shutdown - PCI shutdown for megaraid HBA 616 * @pdev : generic driver model device 617 * 618 * Shutdown notification, perform flush cache. 619 */ 620static void 621megaraid_mbox_shutdown(struct pci_dev *pdev) 622{ 623 adapter_t *adapter = pci_get_drvdata(pdev); 624 static int counter; 625 626 if (!adapter) { 627 con_log(CL_ANN, (KERN_WARNING 628 "megaraid: null device in shutdown\n")); 629 return; 630 } 631 632 // flush caches now 633 con_log(CL_ANN, (KERN_INFO "megaraid: flushing adapter %d...", 634 counter++)); 635 636 megaraid_mbox_flush_cache(adapter); 637 638 con_log(CL_ANN, ("done\n")); 639} 640 641 642/** 643 * megaraid_io_attach - attach a device with the IO subsystem 644 * @adapter : controller's soft state 645 * 646 * Attach this device with the IO subsystem. 647 */ 648static int 649megaraid_io_attach(adapter_t *adapter) 650{ 651 struct Scsi_Host *host; 652 653 // Initialize SCSI Host structure 654 host = scsi_host_alloc(&megaraid_template_g, 8); 655 if (!host) { 656 con_log(CL_ANN, (KERN_WARNING 657 "megaraid mbox: scsi_register failed\n")); 658 659 return -1; 660 } 661 662 SCSIHOST2ADAP(host) = (caddr_t)adapter; 663 adapter->host = host; 664 665 host->irq = adapter->irq; 666 host->unique_id = adapter->unique_id; 667 host->can_queue = adapter->max_cmds; 668 host->this_id = adapter->init_id; 669 host->sg_tablesize = adapter->sglen; 670 host->max_sectors = adapter->max_sectors; 671 host->cmd_per_lun = adapter->cmd_per_lun; 672 host->max_channel = adapter->max_channel; 673 host->max_id = adapter->max_target; 674 host->max_lun = adapter->max_lun; 675 676 677 // notify mid-layer about the new controller 678 if (scsi_add_host(host, &adapter->pdev->dev)) { 679 680 con_log(CL_ANN, (KERN_WARNING 681 "megaraid mbox: scsi_add_host failed\n")); 682 683 scsi_host_put(host); 684 685 return -1; 686 } 687 688 scsi_scan_host(host); 689 690 return 0; 691} 692 693 694/** 695 * megaraid_io_detach - detach a device from the IO subsystem 696 * @adapter : controller's soft state 697 * 698 * Detach this device from the IO subsystem. 699 */ 700static void 701megaraid_io_detach(adapter_t *adapter) 702{ 703 struct Scsi_Host *host; 704 705 con_log(CL_DLEVEL1, (KERN_INFO "megaraid: io detach\n")); 706 707 host = adapter->host; 708 709 scsi_remove_host(host); 710 711 return; 712} 713 714 715/* 716 * START: Mailbox Low Level Driver 717 * 718 * This is section specific to the single mailbox based controllers 719 */ 720 721/** 722 * megaraid_init_mbox - initialize controller 723 * @adapter : our soft state 724 * 725 * - Allocate 16-byte aligned mailbox memory for firmware handshake 726 * - Allocate controller's memory resources 727 * - Find out all initialization data 728 * - Allocate memory required for all the commands 729 * - Use internal library of FW routines, build up complete soft state 730 */ 731static int __devinit 732megaraid_init_mbox(adapter_t *adapter) 733{ 734 struct pci_dev *pdev; 735 mraid_device_t *raid_dev; 736 int i; 737 uint32_t magic64; 738 739 740 adapter->ito = MBOX_TIMEOUT; 741 pdev = adapter->pdev; 742 743 /* 744 * Allocate and initialize the init data structure for mailbox 745 * controllers 746 */ 747 raid_dev = kmalloc(sizeof(mraid_device_t), GFP_KERNEL); 748 if (raid_dev == NULL) return -1; 749 750 memset(raid_dev, 0, sizeof(mraid_device_t)); 751 752 /* 753 * Attach the adapter soft state to raid device soft state 754 */ 755 adapter->raid_device = (caddr_t)raid_dev; 756 raid_dev->fast_load = megaraid_fast_load; 757 758 759 // our baseport 760 raid_dev->baseport = pci_resource_start(pdev, 0); 761 762 if (pci_request_regions(pdev, "MegaRAID: LSI Logic Corporation") != 0) { 763 764 con_log(CL_ANN, (KERN_WARNING 765 "megaraid: mem region busy\n")); 766 767 goto out_free_raid_dev; 768 } 769 770 raid_dev->baseaddr = ioremap_nocache(raid_dev->baseport, 128); 771 772 if (!raid_dev->baseaddr) { 773 774 con_log(CL_ANN, (KERN_WARNING 775 "megaraid: could not map hba memory\n") ); 776 777 goto out_release_regions; 778 } 779 780 /* initialize the mutual exclusion lock for the mailbox */ 781 spin_lock_init(&raid_dev->mailbox_lock); 782 783 /* allocate memory required for commands */ 784 if (megaraid_alloc_cmd_packets(adapter) != 0) 785 goto out_iounmap; 786 787 /* 788 * Issue SYNC cmd to flush the pending cmds in the adapter 789 * and initialize its internal state 790 */ 791 792 if (megaraid_mbox_fire_sync_cmd(adapter)) 793 con_log(CL_ANN, ("megaraid: sync cmd failed\n")); 794 795 /* 796 * Setup the rest of the soft state using the library of 797 * FW routines 798 */ 799 800 /* request IRQ and register the interrupt service routine */ 801 if (request_irq(adapter->irq, megaraid_isr, IRQF_SHARED, "megaraid", 802 adapter)) { 803 804 con_log(CL_ANN, (KERN_WARNING 805 "megaraid: Couldn't register IRQ %d!\n", adapter->irq)); 806 goto out_alloc_cmds; 807 808 } 809 810 // Product info 811 if (megaraid_mbox_product_info(adapter) != 0) 812 goto out_free_irq; 813 814 // Do we support extended CDBs 815 adapter->max_cdb_sz = 10; 816 if (megaraid_mbox_extended_cdb(adapter) == 0) { 817 adapter->max_cdb_sz = 16; 818 } 819 820 /* 821 * Do we support cluster environment, if we do, what is the initiator 822 * id. 823 * NOTE: In a non-cluster aware firmware environment, the LLD should 824 * return 7 as initiator id. 825 */ 826 adapter->ha = 0; 827 adapter->init_id = -1; 828 if (megaraid_mbox_support_ha(adapter, &adapter->init_id) == 0) { 829 adapter->ha = 1; 830 } 831 832 /* 833 * Prepare the device ids array to have the mapping between the kernel 834 * device address and megaraid device address. 835 * We export the physical devices on their actual addresses. The 836 * logical drives are exported on a virtual SCSI channel 837 */ 838 megaraid_mbox_setup_device_map(adapter); 839 840 // If the firmware supports random deletion, update the device id map 841 if (megaraid_mbox_support_random_del(adapter)) { 842 843 // Change the logical drives numbers in device_ids array one 844 // slot in device_ids is reserved for target id, that's why 845 // "<=" below 846 for (i = 0; i <= MAX_LOGICAL_DRIVES_40LD; i++) { 847 adapter->device_ids[adapter->max_channel][i] += 0x80; 848 } 849 adapter->device_ids[adapter->max_channel][adapter->init_id] = 850 0xFF; 851 852 raid_dev->random_del_supported = 1; 853 } 854 855 /* 856 * find out the maximum number of scatter-gather elements supported by 857 * this firmware 858 */ 859 adapter->sglen = megaraid_mbox_get_max_sg(adapter); 860 861 // enumerate RAID and SCSI channels so that all devices on SCSI 862 // channels can later be exported, including disk devices 863 megaraid_mbox_enum_raid_scsi(adapter); 864 865 /* 866 * Other parameters required by upper layer 867 * 868 * maximum number of sectors per IO command 869 */ 870 adapter->max_sectors = megaraid_max_sectors; 871 872 /* 873 * number of queued commands per LUN. 874 */ 875 adapter->cmd_per_lun = megaraid_cmd_per_lun; 876 877 /* 878 * Allocate resources required to issue FW calls, when sysfs is 879 * accessed 880 */ 881 if (megaraid_sysfs_alloc_resources(adapter) != 0) 882 goto out_free_irq; 883 884 // Set the DMA mask to 64-bit. All supported controllers as capable of 885 // DMA in this range 886 pci_read_config_dword(adapter->pdev, PCI_CONF_AMISIG64, &magic64); 887 888 if (((magic64 == HBA_SIGNATURE_64_BIT) && 889 ((adapter->pdev->subsystem_device != 890 PCI_SUBSYS_ID_MEGARAID_SATA_150_6) && 891 (adapter->pdev->subsystem_device != 892 PCI_SUBSYS_ID_MEGARAID_SATA_150_4))) || 893 (adapter->pdev->vendor == PCI_VENDOR_ID_LSI_LOGIC && 894 adapter->pdev->device == PCI_DEVICE_ID_VERDE) || 895 (adapter->pdev->vendor == PCI_VENDOR_ID_LSI_LOGIC && 896 adapter->pdev->device == PCI_DEVICE_ID_DOBSON) || 897 (adapter->pdev->vendor == PCI_VENDOR_ID_LSI_LOGIC && 898 adapter->pdev->device == PCI_DEVICE_ID_LINDSAY) || 899 (adapter->pdev->vendor == PCI_VENDOR_ID_DELL && 900 adapter->pdev->device == PCI_DEVICE_ID_PERC4_DI_EVERGLADES) || 901 (adapter->pdev->vendor == PCI_VENDOR_ID_DELL && 902 adapter->pdev->device == PCI_DEVICE_ID_PERC4E_DI_KOBUK)) { 903 if (pci_set_dma_mask(adapter->pdev, DMA_64BIT_MASK)) { 904 con_log(CL_ANN, (KERN_WARNING 905 "megaraid: DMA mask for 64-bit failed\n")); 906 907 if (pci_set_dma_mask (adapter->pdev, DMA_32BIT_MASK)) { 908 con_log(CL_ANN, (KERN_WARNING 909 "megaraid: 32-bit DMA mask failed\n")); 910 goto out_free_sysfs_res; 911 } 912 } 913 } 914 915 // setup tasklet for DPC 916 tasklet_init(&adapter->dpc_h, megaraid_mbox_dpc, 917 (unsigned long)adapter); 918 919 con_log(CL_DLEVEL1, (KERN_INFO 920 "megaraid mbox hba successfully initialized\n")); 921 922 return 0; 923 924out_free_sysfs_res: 925 megaraid_sysfs_free_resources(adapter); 926out_free_irq: 927 free_irq(adapter->irq, adapter); 928out_alloc_cmds: 929 megaraid_free_cmd_packets(adapter); 930out_iounmap: 931 iounmap(raid_dev->baseaddr); 932out_release_regions: 933 pci_release_regions(pdev); 934out_free_raid_dev: 935 kfree(raid_dev); 936 937 return -1; 938} 939 940 941/** 942 * megaraid_fini_mbox - undo controller initialization 943 * @adapter : our soft state 944 */ 945static void 946megaraid_fini_mbox(adapter_t *adapter) 947{ 948 mraid_device_t *raid_dev = ADAP2RAIDDEV(adapter); 949 950 // flush all caches 951 megaraid_mbox_flush_cache(adapter); 952 953 tasklet_kill(&adapter->dpc_h); 954 955 megaraid_sysfs_free_resources(adapter); 956 957 megaraid_free_cmd_packets(adapter); 958 959 free_irq(adapter->irq, adapter); 960 961 iounmap(raid_dev->baseaddr); 962 963 pci_release_regions(adapter->pdev); 964 965 kfree(raid_dev); 966 967 return; 968} 969 970 971/** 972 * megaraid_alloc_cmd_packets - allocate shared mailbox 973 * @adapter : soft state of the raid controller 974 * 975 * Allocate and align the shared mailbox. This maibox is used to issue 976 * all the commands. For IO based controllers, the mailbox is also regsitered 977 * with the FW. Allocate memory for all commands as well. 978 * This is our big allocator. 979 */ 980static int 981megaraid_alloc_cmd_packets(adapter_t *adapter) 982{ 983 mraid_device_t *raid_dev = ADAP2RAIDDEV(adapter); 984 struct pci_dev *pdev; 985 unsigned long align; 986 scb_t *scb; 987 mbox_ccb_t *ccb; 988 struct mraid_pci_blk *epthru_pci_blk; 989 struct mraid_pci_blk *sg_pci_blk; 990 struct mraid_pci_blk *mbox_pci_blk; 991 int i; 992 993 pdev = adapter->pdev; 994 995 /* 996 * Setup the mailbox 997 * Allocate the common 16-byte aligned memory for the handshake 998 * mailbox. 999 */ 1000 raid_dev->una_mbox64 = pci_alloc_consistent(adapter->pdev, 1001 sizeof(mbox64_t), &raid_dev->una_mbox64_dma); 1002 1003 if (!raid_dev->una_mbox64) { 1004 con_log(CL_ANN, (KERN_WARNING 1005 "megaraid: out of memory, %s %d\n", __FUNCTION__, 1006 __LINE__)); 1007 return -1; 1008 } 1009 memset(raid_dev->una_mbox64, 0, sizeof(mbox64_t)); 1010 1011 /* 1012 * Align the mailbox at 16-byte boundary 1013 */ 1014 raid_dev->mbox = &raid_dev->una_mbox64->mbox32; 1015 1016 raid_dev->mbox = (mbox_t *)((((unsigned long)raid_dev->mbox) + 15) & 1017 (~0UL ^ 0xFUL)); 1018 1019 raid_dev->mbox64 = (mbox64_t *)(((unsigned long)raid_dev->mbox) - 8); 1020 1021 align = ((void *)raid_dev->mbox - 1022 ((void *)&raid_dev->una_mbox64->mbox32)); 1023 1024 raid_dev->mbox_dma = (unsigned long)raid_dev->una_mbox64_dma + 8 + 1025 align; 1026 1027 // Allocate memory for commands issued internally 1028 adapter->ibuf = pci_alloc_consistent(pdev, MBOX_IBUF_SIZE, 1029 &adapter->ibuf_dma_h); 1030 if (!adapter->ibuf) { 1031 1032 con_log(CL_ANN, (KERN_WARNING 1033 "megaraid: out of memory, %s %d\n", __FUNCTION__, 1034 __LINE__)); 1035 1036 goto out_free_common_mbox; 1037 } 1038 memset(adapter->ibuf, 0, MBOX_IBUF_SIZE); 1039 1040 // Allocate memory for our SCSI Command Blocks and their associated 1041 // memory 1042 1043 /* 1044 * Allocate memory for the base list of scb. Later allocate memory for 1045 * CCBs and embedded components of each CCB and point the pointers in 1046 * scb to the allocated components 1047 * NOTE: The code to allocate SCB will be duplicated in all the LLD 1048 * since the calling routine does not yet know the number of available 1049 * commands. 1050 */ 1051 adapter->kscb_list = kmalloc(sizeof(scb_t) * MBOX_MAX_SCSI_CMDS, 1052 GFP_KERNEL); 1053 1054 if (adapter->kscb_list == NULL) { 1055 con_log(CL_ANN, (KERN_WARNING 1056 "megaraid: out of memory, %s %d\n", __FUNCTION__, 1057 __LINE__)); 1058 goto out_free_ibuf; 1059 } 1060 memset(adapter->kscb_list, 0, sizeof(scb_t) * MBOX_MAX_SCSI_CMDS); 1061 1062 // memory allocation for our command packets 1063 if (megaraid_mbox_setup_dma_pools(adapter) != 0) { 1064 con_log(CL_ANN, (KERN_WARNING 1065 "megaraid: out of memory, %s %d\n", __FUNCTION__, 1066 __LINE__)); 1067 goto out_free_scb_list; 1068 } 1069 1070 // Adjust the scb pointers and link in the free pool 1071 epthru_pci_blk = raid_dev->epthru_pool; 1072 sg_pci_blk = raid_dev->sg_pool; 1073 mbox_pci_blk = raid_dev->mbox_pool; 1074 1075 for (i = 0; i < MBOX_MAX_SCSI_CMDS; i++) { 1076 scb = adapter->kscb_list + i; 1077 ccb = raid_dev->ccb_list + i; 1078 1079 ccb->mbox = (mbox_t *)(mbox_pci_blk[i].vaddr + 16); 1080 ccb->raw_mbox = (uint8_t *)ccb->mbox; 1081 ccb->mbox64 = (mbox64_t *)(mbox_pci_blk[i].vaddr + 8); 1082 ccb->mbox_dma_h = (unsigned long)mbox_pci_blk[i].dma_addr + 16; 1083 1084 // make sure the mailbox is aligned properly 1085 if (ccb->mbox_dma_h & 0x0F) { 1086 con_log(CL_ANN, (KERN_CRIT 1087 "megaraid mbox: not aligned on 16-bytes\n")); 1088 1089 goto out_teardown_dma_pools; 1090 } 1091 1092 ccb->epthru = (mraid_epassthru_t *) 1093 epthru_pci_blk[i].vaddr; 1094 ccb->epthru_dma_h = epthru_pci_blk[i].dma_addr; 1095 ccb->pthru = (mraid_passthru_t *)ccb->epthru; 1096 ccb->pthru_dma_h = ccb->epthru_dma_h; 1097 1098 1099 ccb->sgl64 = (mbox_sgl64 *)sg_pci_blk[i].vaddr; 1100 ccb->sgl_dma_h = sg_pci_blk[i].dma_addr; 1101 ccb->sgl32 = (mbox_sgl32 *)ccb->sgl64; 1102 1103 scb->ccb = (caddr_t)ccb; 1104 scb->gp = 0; 1105 1106 scb->sno = i; // command index 1107 1108 scb->scp = NULL; 1109 scb->state = SCB_FREE; 1110 scb->dma_direction = PCI_DMA_NONE; 1111 scb->dma_type = MRAID_DMA_NONE; 1112 scb->dev_channel = -1; 1113 scb->dev_target = -1; 1114 1115 // put scb in the free pool 1116 list_add_tail(&scb->list, &adapter->kscb_pool); 1117 } 1118 1119 return 0; 1120 1121out_teardown_dma_pools: 1122 megaraid_mbox_teardown_dma_pools(adapter); 1123out_free_scb_list: 1124 kfree(adapter->kscb_list); 1125out_free_ibuf: 1126 pci_free_consistent(pdev, MBOX_IBUF_SIZE, (void *)adapter->ibuf, 1127 adapter->ibuf_dma_h); 1128out_free_common_mbox: 1129 pci_free_consistent(adapter->pdev, sizeof(mbox64_t), 1130 (caddr_t)raid_dev->una_mbox64, raid_dev->una_mbox64_dma); 1131 1132 return -1; 1133} 1134 1135 1136/** 1137 * megaraid_free_cmd_packets - free memory 1138 * @adapter : soft state of the raid controller 1139 * 1140 * Release memory resources allocated for commands. 1141 */ 1142static void 1143megaraid_free_cmd_packets(adapter_t *adapter) 1144{ 1145 mraid_device_t *raid_dev = ADAP2RAIDDEV(adapter); 1146 1147 megaraid_mbox_teardown_dma_pools(adapter); 1148 1149 kfree(adapter->kscb_list); 1150 1151 pci_free_consistent(adapter->pdev, MBOX_IBUF_SIZE, 1152 (void *)adapter->ibuf, adapter->ibuf_dma_h); 1153 1154 pci_free_consistent(adapter->pdev, sizeof(mbox64_t), 1155 (caddr_t)raid_dev->una_mbox64, raid_dev->una_mbox64_dma); 1156 return; 1157} 1158 1159 1160/** 1161 * megaraid_mbox_setup_dma_pools - setup dma pool for command packets 1162 * @adapter : HBA soft state 1163 * 1164 * Setup the dma pools for mailbox, passthru and extended passthru structures, 1165 * and scatter-gather lists. 1166 */ 1167static int 1168megaraid_mbox_setup_dma_pools(adapter_t *adapter) 1169{ 1170 mraid_device_t *raid_dev = ADAP2RAIDDEV(adapter); 1171 struct mraid_pci_blk *epthru_pci_blk; 1172 struct mraid_pci_blk *sg_pci_blk; 1173 struct mraid_pci_blk *mbox_pci_blk; 1174 int i; 1175 1176 1177 1178 // Allocate memory for 16-bytes aligned mailboxes 1179 raid_dev->mbox_pool_handle = pci_pool_create("megaraid mbox pool", 1180 adapter->pdev, 1181 sizeof(mbox64_t) + 16, 1182 16, 0); 1183 1184 if (raid_dev->mbox_pool_handle == NULL) { 1185 goto fail_setup_dma_pool; 1186 } 1187 1188 mbox_pci_blk = raid_dev->mbox_pool; 1189 for (i = 0; i < MBOX_MAX_SCSI_CMDS; i++) { 1190 mbox_pci_blk[i].vaddr = pci_pool_alloc( 1191 raid_dev->mbox_pool_handle, 1192 GFP_KERNEL, 1193 &mbox_pci_blk[i].dma_addr); 1194 if (!mbox_pci_blk[i].vaddr) { 1195 goto fail_setup_dma_pool; 1196 } 1197 } 1198 1199 /* 1200 * Allocate memory for each embedded passthru strucuture pointer 1201 * Request for a 128 bytes aligned structure for each passthru command 1202 * structure 1203 * Since passthru and extended passthru commands are exclusive, they 1204 * share common memory pool. Passthru structures piggyback on memory 1205 * allocted to extended passthru since passthru is smaller of the two 1206 */ 1207 raid_dev->epthru_pool_handle = pci_pool_create("megaraid mbox pthru", 1208 adapter->pdev, sizeof(mraid_epassthru_t), 128, 0); 1209 1210 if (raid_dev->epthru_pool_handle == NULL) { 1211 goto fail_setup_dma_pool; 1212 } 1213 1214 epthru_pci_blk = raid_dev->epthru_pool; 1215 for (i = 0; i < MBOX_MAX_SCSI_CMDS; i++) { 1216 epthru_pci_blk[i].vaddr = pci_pool_alloc( 1217 raid_dev->epthru_pool_handle, 1218 GFP_KERNEL, 1219 &epthru_pci_blk[i].dma_addr); 1220 if (!epthru_pci_blk[i].vaddr) { 1221 goto fail_setup_dma_pool; 1222 } 1223 } 1224 1225 1226 // Allocate memory for each scatter-gather list. Request for 512 bytes 1227 // alignment for each sg list 1228 raid_dev->sg_pool_handle = pci_pool_create("megaraid mbox sg", 1229 adapter->pdev, 1230 sizeof(mbox_sgl64) * MBOX_MAX_SG_SIZE, 1231 512, 0); 1232 1233 if (raid_dev->sg_pool_handle == NULL) { 1234 goto fail_setup_dma_pool; 1235 } 1236 1237 sg_pci_blk = raid_dev->sg_pool; 1238 for (i = 0; i < MBOX_MAX_SCSI_CMDS; i++) { 1239 sg_pci_blk[i].vaddr = pci_pool_alloc( 1240 raid_dev->sg_pool_handle, 1241 GFP_KERNEL, 1242 &sg_pci_blk[i].dma_addr); 1243 if (!sg_pci_blk[i].vaddr) { 1244 goto fail_setup_dma_pool; 1245 } 1246 } 1247 1248 return 0; 1249 1250fail_setup_dma_pool: 1251 megaraid_mbox_teardown_dma_pools(adapter); 1252 return -1; 1253} 1254 1255 1256/** 1257 * megaraid_mbox_teardown_dma_pools - teardown dma pools for command packets 1258 * @adapter : HBA soft state 1259 * 1260 * Teardown the dma pool for mailbox, passthru and extended passthru 1261 * structures, and scatter-gather lists. 1262 */ 1263static void 1264megaraid_mbox_teardown_dma_pools(adapter_t *adapter) 1265{ 1266 mraid_device_t *raid_dev = ADAP2RAIDDEV(adapter); 1267 struct mraid_pci_blk *epthru_pci_blk; 1268 struct mraid_pci_blk *sg_pci_blk; 1269 struct mraid_pci_blk *mbox_pci_blk; 1270 int i; 1271 1272 1273 sg_pci_blk = raid_dev->sg_pool; 1274 for (i = 0; i < MBOX_MAX_SCSI_CMDS && sg_pci_blk[i].vaddr; i++) { 1275 pci_pool_free(raid_dev->sg_pool_handle, sg_pci_blk[i].vaddr, 1276 sg_pci_blk[i].dma_addr); 1277 } 1278 if (raid_dev->sg_pool_handle) 1279 pci_pool_destroy(raid_dev->sg_pool_handle); 1280 1281 1282 epthru_pci_blk = raid_dev->epthru_pool; 1283 for (i = 0; i < MBOX_MAX_SCSI_CMDS && epthru_pci_blk[i].vaddr; i++) { 1284 pci_pool_free(raid_dev->epthru_pool_handle, 1285 epthru_pci_blk[i].vaddr, epthru_pci_blk[i].dma_addr); 1286 } 1287 if (raid_dev->epthru_pool_handle) 1288 pci_pool_destroy(raid_dev->epthru_pool_handle); 1289 1290 1291 mbox_pci_blk = raid_dev->mbox_pool; 1292 for (i = 0; i < MBOX_MAX_SCSI_CMDS && mbox_pci_blk[i].vaddr; i++) { 1293 pci_pool_free(raid_dev->mbox_pool_handle, 1294 mbox_pci_blk[i].vaddr, mbox_pci_blk[i].dma_addr); 1295 } 1296 if (raid_dev->mbox_pool_handle) 1297 pci_pool_destroy(raid_dev->mbox_pool_handle); 1298 1299 return; 1300} 1301 1302 1303/** 1304 * megaraid_alloc_scb - detach and return a scb from the free list 1305 * @adapter : controller's soft state 1306 * @scp : pointer to the scsi command to be executed 1307 * 1308 * Return the scb from the head of the free list. %NULL if there are none 1309 * available. 1310 */ 1311static scb_t * 1312megaraid_alloc_scb(adapter_t *adapter, struct scsi_cmnd *scp) 1313{ 1314 struct list_head *head = &adapter->kscb_pool; 1315 scb_t *scb = NULL; 1316 unsigned long flags; 1317 1318 // detach scb from free pool 1319 spin_lock_irqsave(SCSI_FREE_LIST_LOCK(adapter), flags); 1320 1321 if (list_empty(head)) { 1322 spin_unlock_irqrestore(SCSI_FREE_LIST_LOCK(adapter), flags); 1323 return NULL; 1324 } 1325 1326 scb = list_entry(head->next, scb_t, list); 1327 list_del_init(&scb->list); 1328 1329 spin_unlock_irqrestore(SCSI_FREE_LIST_LOCK(adapter), flags); 1330 1331 scb->state = SCB_ACTIVE; 1332 scb->scp = scp; 1333 scb->dma_type = MRAID_DMA_NONE; 1334 1335 return scb; 1336} 1337 1338 1339/** 1340 * megaraid_dealloc_scb - return the scb to the free pool 1341 * @adapter : controller's soft state 1342 * @scb : scb to be freed 1343 * 1344 * Return the scb back to the free list of scbs. The caller must 'flush' the 1345 * SCB before calling us. E.g., performing pci_unamp and/or pci_sync etc. 1346 * NOTE NOTE: Make sure the scb is not on any list before calling this 1347 * routine. 1348 */ 1349static inline void 1350megaraid_dealloc_scb(adapter_t *adapter, scb_t *scb) 1351{ 1352 unsigned long flags; 1353 1354 // put scb in the free pool 1355 scb->state = SCB_FREE; 1356 scb->scp = NULL; 1357 spin_lock_irqsave(SCSI_FREE_LIST_LOCK(adapter), flags); 1358 1359 list_add(&scb->list, &adapter->kscb_pool); 1360 1361 spin_unlock_irqrestore(SCSI_FREE_LIST_LOCK(adapter), flags); 1362 1363 return; 1364} 1365 1366 1367/** 1368 * megaraid_mbox_mksgl - make the scatter-gather list 1369 * @adapter : controller's soft state 1370 * @scb : scsi control block 1371 * 1372 * Prepare the scatter-gather list. 1373 */ 1374static int 1375megaraid_mbox_mksgl(adapter_t *adapter, scb_t *scb) 1376{ 1377 struct scatterlist *sgl; 1378 mbox_ccb_t *ccb; 1379 struct page *page; 1380 unsigned long offset; 1381 struct scsi_cmnd *scp; 1382 int sgcnt; 1383 int i; 1384 1385 1386 scp = scb->scp; 1387 ccb = (mbox_ccb_t *)scb->ccb; 1388 1389 // no mapping required if no data to be transferred 1390 if (!scp->request_buffer || !scp->request_bufflen) 1391 return 0; 1392 1393 if (!scp->use_sg) { /* scatter-gather list not used */ 1394 1395 page = virt_to_page(scp->request_buffer); 1396 1397 offset = ((unsigned long)scp->request_buffer & ~PAGE_MASK); 1398 1399 ccb->buf_dma_h = pci_map_page(adapter->pdev, page, offset, 1400 scp->request_bufflen, 1401 scb->dma_direction); 1402 scb->dma_type = MRAID_DMA_WBUF; 1403 1404 /* 1405 * We need to handle special 64-bit commands that need a 1406 * minimum of 1 SG 1407 */ 1408 sgcnt = 1; 1409 ccb->sgl64[0].address = ccb->buf_dma_h; 1410 ccb->sgl64[0].length = scp->request_bufflen; 1411 1412 return sgcnt; 1413 } 1414 1415 sgl = (struct scatterlist *)scp->request_buffer; 1416 1417 // The number of sg elements returned must not exceed our limit 1418 sgcnt = pci_map_sg(adapter->pdev, sgl, scp->use_sg, 1419 scb->dma_direction); 1420 1421 if (sgcnt > adapter->sglen) { 1422 con_log(CL_ANN, (KERN_CRIT 1423 "megaraid critical: too many sg elements:%d\n", 1424 sgcnt)); 1425 BUG(); 1426 } 1427 1428 scb->dma_type = MRAID_DMA_WSG; 1429 1430 for (i = 0; i < sgcnt; i++, sgl++) { 1431 ccb->sgl64[i].address = sg_dma_address(sgl); 1432 ccb->sgl64[i].length = sg_dma_len(sgl); 1433 } 1434 1435 // Return count of SG nodes 1436 return sgcnt; 1437} 1438 1439 1440/** 1441 * mbox_post_cmd - issue a mailbox command 1442 * @adapter : controller's soft state 1443 * @scb : command to be issued 1444 * 1445 * Post the command to the controller if mailbox is available. 1446 */ 1447static int 1448mbox_post_cmd(adapter_t *adapter, scb_t *scb) 1449{ 1450 mraid_device_t *raid_dev = ADAP2RAIDDEV(adapter); 1451 mbox64_t *mbox64; 1452 mbox_t *mbox; 1453 mbox_ccb_t *ccb; 1454 unsigned long flags; 1455 unsigned int i = 0; 1456 1457 1458 ccb = (mbox_ccb_t *)scb->ccb; 1459 mbox = raid_dev->mbox; 1460 mbox64 = raid_dev->mbox64; 1461 1462 /* 1463 * Check for busy mailbox. If it is, return failure - the caller 1464 * should retry later. 1465 */ 1466 spin_lock_irqsave(MAILBOX_LOCK(raid_dev), flags); 1467 1468 if (unlikely(mbox->busy)) { 1469 do { 1470 udelay(1); 1471 i++; 1472 rmb(); 1473 } while(mbox->busy && (i < max_mbox_busy_wait)); 1474 1475 if (mbox->busy) { 1476 1477 spin_unlock_irqrestore(MAILBOX_LOCK(raid_dev), flags); 1478 1479 return -1; 1480 } 1481 } 1482 1483 1484 // Copy this command's mailbox data into "adapter's" mailbox 1485 memcpy((caddr_t)mbox64, (caddr_t)ccb->mbox64, 22); 1486 mbox->cmdid = scb->sno; 1487 1488 adapter->outstanding_cmds++; 1489 1490 if (scb->dma_direction == PCI_DMA_TODEVICE) { 1491 if (!scb->scp->use_sg) { // sg list not used 1492 pci_dma_sync_single_for_device(adapter->pdev, 1493 ccb->buf_dma_h, 1494 scb->scp->request_bufflen, 1495 PCI_DMA_TODEVICE); 1496 } 1497 else { 1498 pci_dma_sync_sg_for_device(adapter->pdev, 1499 scb->scp->request_buffer, 1500 scb->scp->use_sg, PCI_DMA_TODEVICE); 1501 } 1502 } 1503 1504 mbox->busy = 1; // Set busy 1505 mbox->poll = 0; 1506 mbox->ack = 0; 1507 wmb(); 1508 1509 WRINDOOR(raid_dev, raid_dev->mbox_dma | 0x1); 1510 1511 spin_unlock_irqrestore(MAILBOX_LOCK(raid_dev), flags); 1512 1513 return 0; 1514} 1515 1516 1517/** 1518 * megaraid_queue_command - generic queue entry point for all LLDs 1519 * @scp : pointer to the scsi command to be executed 1520 * @done : callback routine to be called after the cmd has be completed 1521 * 1522 * Queue entry point for mailbox based controllers. 1523 */ 1524static int 1525megaraid_queue_command(struct scsi_cmnd *scp, void (*done)(struct scsi_cmnd *)) 1526{ 1527 adapter_t *adapter; 1528 scb_t *scb; 1529 int if_busy; 1530 1531 adapter = SCP2ADAPTER(scp); 1532 scp->scsi_done = done; 1533 scp->result = 0; 1534 1535 /* 1536 * Allocate and build a SCB request 1537 * if_busy flag will be set if megaraid_mbox_build_cmd() command could 1538 * not allocate scb. We will return non-zero status in that case. 1539 * NOTE: scb can be null even though certain commands completed 1540 * successfully, e.g., MODE_SENSE and TEST_UNIT_READY, it would 1541 * return 0 in that case, and we would do the callback right away. 1542 */ 1543 if_busy = 0; 1544 scb = megaraid_mbox_build_cmd(adapter, scp, &if_busy); 1545 if (!scb) { // command already completed 1546 done(scp); 1547 return 0; 1548 } 1549 1550 megaraid_mbox_runpendq(adapter, scb); 1551 return if_busy; 1552} 1553 1554/** 1555 * megaraid_mbox_build_cmd - transform the mid-layer scsi commands 1556 * @adapter : controller's soft state 1557 * @scp : mid-layer scsi command pointer 1558 * @busy : set if request could not be completed because of lack of 1559 * resources 1560 * 1561 * Transform the mid-layer scsi command to megaraid firmware lingua. 1562 * Convert the command issued by mid-layer to format understood by megaraid 1563 * firmware. We also complete certain commands without sending them to firmware. 1564 */ 1565static scb_t * 1566megaraid_mbox_build_cmd(adapter_t *adapter, struct scsi_cmnd *scp, int *busy) 1567{ 1568 mraid_device_t *rdev = ADAP2RAIDDEV(adapter); 1569 int channel; 1570 int target; 1571 int islogical; 1572 mbox_ccb_t *ccb; 1573 mraid_passthru_t *pthru; 1574 mbox64_t *mbox64; 1575 mbox_t *mbox; 1576 scb_t *scb; 1577 char skip[] = "skipping"; 1578 char scan[] = "scanning"; 1579 char *ss; 1580 1581 1582 /* 1583 * Get the appropriate device map for the device this command is 1584 * intended for 1585 */ 1586 MRAID_GET_DEVICE_MAP(adapter, scp, channel, target, islogical); 1587 1588 /* 1589 * Logical drive commands 1590 */ 1591 if (islogical) { 1592 switch (scp->cmnd[0]) { 1593 case TEST_UNIT_READY: 1594 /* 1595 * Do we support clustering and is the support enabled 1596 * If no, return success always 1597 */ 1598 if (!adapter->ha) { 1599 scp->result = (DID_OK << 16); 1600 return NULL; 1601 } 1602 1603 if (!(scb = megaraid_alloc_scb(adapter, scp))) { 1604 scp->result = (DID_ERROR << 16); 1605 *busy = 1; 1606 return NULL; 1607 } 1608 1609 scb->dma_direction = scp->sc_data_direction; 1610 scb->dev_channel = 0xFF; 1611 scb->dev_target = target; 1612 ccb = (mbox_ccb_t *)scb->ccb; 1613 1614 /* 1615 * The command id will be provided by the command 1616 * issuance routine 1617 */ 1618 ccb->raw_mbox[0] = CLUSTER_CMD; 1619 ccb->raw_mbox[2] = RESERVATION_STATUS; 1620 ccb->raw_mbox[3] = target; 1621 1622 return scb; 1623 1624 case MODE_SENSE: 1625 if (scp->use_sg) { 1626 struct scatterlist *sgl; 1627 caddr_t vaddr; 1628 1629 sgl = (struct scatterlist *)scp->request_buffer; 1630 if (sgl->page) { 1631 vaddr = (caddr_t) 1632 (page_address((&sgl[0])->page) 1633 + (&sgl[0])->offset); 1634 1635 memset(vaddr, 0, scp->cmnd[4]); 1636 } 1637 else { 1638 con_log(CL_ANN, (KERN_WARNING 1639 "megaraid mailbox: invalid sg:%d\n", 1640 __LINE__)); 1641 } 1642 } 1643 else { 1644 memset(scp->request_buffer, 0, scp->cmnd[4]); 1645 } 1646 scp->result = (DID_OK << 16); 1647 return NULL; 1648 1649 case INQUIRY: 1650 /* 1651 * Display the channel scan for logical drives 1652 * Do not display scan for a channel if already done. 1653 */ 1654 if (!(rdev->last_disp & (1L << SCP2CHANNEL(scp)))) { 1655 1656 con_log(CL_ANN, (KERN_INFO 1657 "scsi[%d]: scanning scsi channel %d", 1658 adapter->host->host_no, 1659 SCP2CHANNEL(scp))); 1660 1661 con_log(CL_ANN, ( 1662 " [virtual] for logical drives\n")); 1663 1664 rdev->last_disp |= (1L << SCP2CHANNEL(scp)); 1665 } 1666 1667 if (scp->cmnd[1] & MEGA_SCSI_INQ_EVPD) { 1668 scp->sense_buffer[0] = 0x70; 1669 scp->sense_buffer[2] = ILLEGAL_REQUEST; 1670 scp->sense_buffer[12] = MEGA_INVALID_FIELD_IN_CDB; 1671 scp->result = CHECK_CONDITION << 1; 1672 return NULL; 1673 } 1674 1675 /* Fall through */ 1676 1677 case READ_CAPACITY: 1678 /* 1679 * Do not allow LUN > 0 for logical drives and 1680 * requests for more than 40 logical drives 1681 */ 1682 if (SCP2LUN(scp)) { 1683 scp->result = (DID_BAD_TARGET << 16); 1684 return NULL; 1685 } 1686 if ((target % 0x80) >= MAX_LOGICAL_DRIVES_40LD) { 1687 scp->result = (DID_BAD_TARGET << 16); 1688 return NULL; 1689 } 1690 1691 1692 /* Allocate a SCB and initialize passthru */ 1693 if (!(scb = megaraid_alloc_scb(adapter, scp))) { 1694 scp->result = (DID_ERROR << 16); 1695 *busy = 1; 1696 return NULL; 1697 } 1698 1699 ccb = (mbox_ccb_t *)scb->ccb; 1700 scb->dev_channel = 0xFF; 1701 scb->dev_target = target; 1702 pthru = ccb->pthru; 1703 mbox = ccb->mbox; 1704 mbox64 = ccb->mbox64; 1705 1706 pthru->timeout = 0; 1707 pthru->ars = 1; 1708 pthru->reqsenselen = 14; 1709 pthru->islogical = 1; 1710 pthru->logdrv = target; 1711 pthru->cdblen = scp->cmd_len; 1712 memcpy(pthru->cdb, scp->cmnd, scp->cmd_len); 1713 1714 mbox->cmd = MBOXCMD_PASSTHRU64; 1715 scb->dma_direction = scp->sc_data_direction; 1716 1717 pthru->dataxferlen = scp->request_bufflen; 1718 pthru->dataxferaddr = ccb->sgl_dma_h; 1719 pthru->numsge = megaraid_mbox_mksgl(adapter, 1720 scb); 1721 1722 mbox->xferaddr = 0xFFFFFFFF; 1723 mbox64->xferaddr_lo = (uint32_t )ccb->pthru_dma_h; 1724 mbox64->xferaddr_hi = 0; 1725 1726 return scb; 1727 1728 case READ_6: 1729 case WRITE_6: 1730 case READ_10: 1731 case WRITE_10: 1732 case READ_12: 1733 case WRITE_12: 1734 1735 /* 1736 * Allocate a SCB and initialize mailbox 1737 */ 1738 if (!(scb = megaraid_alloc_scb(adapter, scp))) { 1739 scp->result = (DID_ERROR << 16); 1740 *busy = 1; 1741 return NULL; 1742 } 1743 ccb = (mbox_ccb_t *)scb->ccb; 1744 scb->dev_channel = 0xFF; 1745 scb->dev_target = target; 1746 mbox = ccb->mbox; 1747 mbox64 = ccb->mbox64; 1748 mbox->logdrv = target; 1749 1750 /* 1751 * A little HACK: 2nd bit is zero for all scsi read 1752 * commands and is set for all scsi write commands 1753 */ 1754 mbox->cmd = (scp->cmnd[0] & 0x02) ? MBOXCMD_LWRITE64: 1755 MBOXCMD_LREAD64 ; 1756 1757 /* 1758 * 6-byte READ(0x08) or WRITE(0x0A) cdb 1759 */ 1760 if (scp->cmd_len == 6) { 1761 mbox->numsectors = (uint32_t)scp->cmnd[4]; 1762 mbox->lba = 1763 ((uint32_t)scp->cmnd[1] << 16) | 1764 ((uint32_t)scp->cmnd[2] << 8) | 1765 (uint32_t)scp->cmnd[3]; 1766 1767 mbox->lba &= 0x1FFFFF; 1768 } 1769 1770 /* 1771 * 10-byte READ(0x28) or WRITE(0x2A) cdb 1772 */ 1773 else if (scp->cmd_len == 10) { 1774 mbox->numsectors = 1775 (uint32_t)scp->cmnd[8] | 1776 ((uint32_t)scp->cmnd[7] << 8); 1777 mbox->lba = 1778 ((uint32_t)scp->cmnd[2] << 24) | 1779 ((uint32_t)scp->cmnd[3] << 16) | 1780 ((uint32_t)scp->cmnd[4] << 8) | 1781 (uint32_t)scp->cmnd[5]; 1782 } 1783 1784 /* 1785 * 12-byte READ(0xA8) or WRITE(0xAA) cdb 1786 */ 1787 else if (scp->cmd_len == 12) { 1788 mbox->lba = 1789 ((uint32_t)scp->cmnd[2] << 24) | 1790 ((uint32_t)scp->cmnd[3] << 16) | 1791 ((uint32_t)scp->cmnd[4] << 8) | 1792 (uint32_t)scp->cmnd[5]; 1793 1794 mbox->numsectors = 1795 ((uint32_t)scp->cmnd[6] << 24) | 1796 ((uint32_t)scp->cmnd[7] << 16) | 1797 ((uint32_t)scp->cmnd[8] << 8) | 1798 (uint32_t)scp->cmnd[9]; 1799 } 1800 else { 1801 con_log(CL_ANN, (KERN_WARNING 1802 "megaraid: unsupported CDB length\n")); 1803 1804 megaraid_dealloc_scb(adapter, scb); 1805 1806 scp->result = (DID_ERROR << 16); 1807 return NULL; 1808 } 1809 1810 scb->dma_direction = scp->sc_data_direction; 1811 1812 // Calculate Scatter-Gather info 1813 mbox64->xferaddr_lo = (uint32_t )ccb->sgl_dma_h; 1814 mbox->numsge = megaraid_mbox_mksgl(adapter, 1815 scb); 1816 mbox->xferaddr = 0xFFFFFFFF; 1817 mbox64->xferaddr_hi = 0; 1818 1819 return scb; 1820 1821 case RESERVE: 1822 case RELEASE: 1823 /* 1824 * Do we support clustering and is the support enabled 1825 */ 1826 if (!adapter->ha) { 1827 scp->result = (DID_BAD_TARGET << 16); 1828 return NULL; 1829 } 1830 1831 /* 1832 * Allocate a SCB and initialize mailbox 1833 */ 1834 if (!(scb = megaraid_alloc_scb(adapter, scp))) { 1835 scp->result = (DID_ERROR << 16); 1836 *busy = 1; 1837 return NULL; 1838 } 1839 1840 ccb = (mbox_ccb_t *)scb->ccb; 1841 scb->dev_channel = 0xFF; 1842 scb->dev_target = target; 1843 ccb->raw_mbox[0] = CLUSTER_CMD; 1844 ccb->raw_mbox[2] = (scp->cmnd[0] == RESERVE) ? 1845 RESERVE_LD : RELEASE_LD; 1846 1847 ccb->raw_mbox[3] = target; 1848 scb->dma_direction = scp->sc_data_direction; 1849 1850 return scb; 1851 1852 default: 1853 scp->result = (DID_BAD_TARGET << 16); 1854 return NULL; 1855 } 1856 } 1857 else { // Passthru device commands 1858 1859 // Do not allow access to target id > 15 or LUN > 7 1860 if (target > 15 || SCP2LUN(scp) > 7) { 1861 scp->result = (DID_BAD_TARGET << 16); 1862 return NULL; 1863 } 1864 1865 // if fast load option was set and scan for last device is 1866 // over, reset the fast_load flag so that during a possible 1867 // next scan, devices can be made available 1868 if (rdev->fast_load && (target == 15) && 1869 (SCP2CHANNEL(scp) == adapter->max_channel -1)) { 1870 1871 con_log(CL_ANN, (KERN_INFO 1872 "megaraid[%d]: physical device scan re-enabled\n", 1873 adapter->host->host_no)); 1874 rdev->fast_load = 0; 1875 } 1876 1877 /* 1878 * Display the channel scan for physical devices 1879 */ 1880 if (!(rdev->last_disp & (1L << SCP2CHANNEL(scp)))) { 1881 1882 ss = rdev->fast_load ? skip : scan; 1883 1884 con_log(CL_ANN, (KERN_INFO 1885 "scsi[%d]: %s scsi channel %d [Phy %d]", 1886 adapter->host->host_no, ss, SCP2CHANNEL(scp), 1887 channel)); 1888 1889 con_log(CL_ANN, ( 1890 " for non-raid devices\n")); 1891 1892 rdev->last_disp |= (1L << SCP2CHANNEL(scp)); 1893 } 1894 1895 // disable channel sweep if fast load option given 1896 if (rdev->fast_load) { 1897 scp->result = (DID_BAD_TARGET << 16); 1898 return NULL; 1899 } 1900 1901 // Allocate a SCB and initialize passthru 1902 if (!(scb = megaraid_alloc_scb(adapter, scp))) { 1903 scp->result = (DID_ERROR << 16); 1904 *busy = 1; 1905 return NULL; 1906 } 1907 1908 ccb = (mbox_ccb_t *)scb->ccb; 1909 scb->dev_channel = channel; 1910 scb->dev_target = target; 1911 scb->dma_direction = scp->sc_data_direction; 1912 mbox = ccb->mbox; 1913 mbox64 = ccb->mbox64; 1914 1915 // Does this firmware support extended CDBs 1916 if (adapter->max_cdb_sz == 16) { 1917 mbox->cmd = MBOXCMD_EXTPTHRU; 1918 1919 megaraid_mbox_prepare_epthru(adapter, scb, scp); 1920 1921 mbox64->xferaddr_lo = (uint32_t)ccb->epthru_dma_h; 1922 mbox64->xferaddr_hi = 0; 1923 mbox->xferaddr = 0xFFFFFFFF; 1924 } 1925 else { 1926 mbox->cmd = MBOXCMD_PASSTHRU64; 1927 1928 megaraid_mbox_prepare_pthru(adapter, scb, scp); 1929 1930 mbox64->xferaddr_lo = (uint32_t)ccb->pthru_dma_h; 1931 mbox64->xferaddr_hi = 0; 1932 mbox->xferaddr = 0xFFFFFFFF; 1933 } 1934 return scb; 1935 } 1936 1937 // NOT REACHED 1938} 1939 1940 1941/** 1942 * megaraid_mbox_runpendq - execute commands queued in the pending queue 1943 * @adapter : controller's soft state 1944 * @scb_q : SCB to be queued in the pending list 1945 * 1946 * Scan the pending list for commands which are not yet issued and try to 1947 * post to the controller. The SCB can be a null pointer, which would indicate 1948 * no SCB to be queue, just try to execute the ones in the pending list. 1949 * 1950 * NOTE: We do not actually traverse the pending list. The SCBs are plucked 1951 * out from the head of the pending list. If it is successfully issued, the 1952 * next SCB is at the head now. 1953 */ 1954static void 1955megaraid_mbox_runpendq(adapter_t *adapter, scb_t *scb_q) 1956{ 1957 scb_t *scb; 1958 unsigned long flags; 1959 1960 spin_lock_irqsave(PENDING_LIST_LOCK(adapter), flags); 1961 1962 if (scb_q) { 1963 scb_q->state = SCB_PENDQ; 1964 list_add_tail(&scb_q->list, &adapter->pend_list); 1965 } 1966 1967 // if the adapter in not in quiescent mode, post the commands to FW 1968 if (adapter->quiescent) { 1969 spin_unlock_irqrestore(PENDING_LIST_LOCK(adapter), flags); 1970 return; 1971 } 1972 1973 while (!list_empty(&adapter->pend_list)) { 1974 1975 assert_spin_locked(PENDING_LIST_LOCK(adapter)); 1976 1977 scb = list_entry(adapter->pend_list.next, scb_t, list); 1978 1979 // remove the scb from the pending list and try to 1980 // issue. If we are unable to issue it, put back in 1981 // the pending list and return 1982 1983 list_del_init(&scb->list); 1984 1985 spin_unlock_irqrestore(PENDING_LIST_LOCK(adapter), flags); 1986 1987 // if mailbox was busy, return SCB back to pending 1988 // list. Make sure to add at the head, since that's 1989 // where it would have been removed from 1990 1991 scb->state = SCB_ISSUED; 1992 1993 if (mbox_post_cmd(adapter, scb) != 0) { 1994 1995 spin_lock_irqsave(PENDING_LIST_LOCK(adapter), flags); 1996 1997 scb->state = SCB_PENDQ; 1998 1999 list_add(&scb->list, &adapter->pend_list); 2000 2001 spin_unlock_irqrestore(PENDING_LIST_LOCK(adapter), 2002 flags); 2003 2004 return; 2005 } 2006 2007 spin_lock_irqsave(PENDING_LIST_LOCK(adapter), flags); 2008 } 2009 2010 spin_unlock_irqrestore(PENDING_LIST_LOCK(adapter), flags); 2011 2012 2013 return; 2014} 2015 2016 2017/** 2018 * megaraid_mbox_prepare_pthru - prepare a command for physical devices 2019 * @adapter : pointer to controller's soft state 2020 * @scb : scsi control block 2021 * @scp : scsi command from the mid-layer 2022 * 2023 * Prepare a command for the scsi physical devices. 2024 */ 2025static void 2026megaraid_mbox_prepare_pthru(adapter_t *adapter, scb_t *scb, 2027 struct scsi_cmnd *scp) 2028{ 2029 mbox_ccb_t *ccb; 2030 mraid_passthru_t *pthru; 2031 uint8_t channel; 2032 uint8_t target; 2033 2034 ccb = (mbox_ccb_t *)scb->ccb; 2035 pthru = ccb->pthru; 2036 channel = scb->dev_channel; 2037 target = scb->dev_target; 2038 2039 // 0=6sec, 1=60sec, 2=10min, 3=3hrs, 4=NO timeout 2040 pthru->timeout = 4; 2041 pthru->ars = 1; 2042 pthru->islogical = 0; 2043 pthru->channel = 0; 2044 pthru->target = (channel << 4) | target; 2045 pthru->logdrv = SCP2LUN(scp); 2046 pthru->reqsenselen = 14; 2047 pthru->cdblen = scp->cmd_len; 2048 2049 memcpy(pthru->cdb, scp->cmnd, scp->cmd_len); 2050 2051 if (scp->request_bufflen) { 2052 pthru->dataxferlen = scp->request_bufflen; 2053 pthru->dataxferaddr = ccb->sgl_dma_h; 2054 pthru->numsge = megaraid_mbox_mksgl(adapter, scb); 2055 } 2056 else { 2057 pthru->dataxferaddr = 0; 2058 pthru->dataxferlen = 0; 2059 pthru->numsge = 0; 2060 } 2061 return; 2062} 2063 2064 2065/** 2066 * megaraid_mbox_prepare_epthru - prepare a command for physical devices 2067 * @adapter : pointer to controller's soft state 2068 * @scb : scsi control block 2069 * @scp : scsi command from the mid-layer 2070 * 2071 * Prepare a command for the scsi physical devices. This rountine prepares 2072 * commands for devices which can take extended CDBs (>10 bytes). 2073 */ 2074static void 2075megaraid_mbox_prepare_epthru(adapter_t *adapter, scb_t *scb, 2076 struct scsi_cmnd *scp) 2077{ 2078 mbox_ccb_t *ccb; 2079 mraid_epassthru_t *epthru; 2080 uint8_t channel; 2081 uint8_t target; 2082 2083 ccb = (mbox_ccb_t *)scb->ccb; 2084 epthru = ccb->epthru; 2085 channel = scb->dev_channel; 2086 target = scb->dev_target; 2087 2088 // 0=6sec, 1=60sec, 2=10min, 3=3hrs, 4=NO timeout 2089 epthru->timeout = 4; 2090 epthru->ars = 1; 2091 epthru->islogical = 0; 2092 epthru->channel = 0; 2093 epthru->target = (channel << 4) | target; 2094 epthru->logdrv = SCP2LUN(scp); 2095 epthru->reqsenselen = 14; 2096 epthru->cdblen = scp->cmd_len; 2097 2098 memcpy(epthru->cdb, scp->cmnd, scp->cmd_len); 2099 2100 if (scp->request_bufflen) { 2101 epthru->dataxferlen = scp->request_bufflen; 2102 epthru->dataxferaddr = ccb->sgl_dma_h; 2103 epthru->numsge = megaraid_mbox_mksgl(adapter, scb); 2104 } 2105 else { 2106 epthru->dataxferaddr = 0; 2107 epthru->dataxferlen = 0; 2108 epthru->numsge = 0; 2109 } 2110 return; 2111} 2112 2113 2114/** 2115 * megaraid_ack_sequence - interrupt ack sequence for memory mapped HBAs 2116 * @adapter : controller's soft state 2117 * 2118 * Interrupt acknowledgement sequence for memory mapped HBAs. Find out the 2119 * completed command and put them on the completed list for later processing. 2120 * 2121 * Returns: 1 if the interrupt is valid, 0 otherwise 2122 */ 2123static int 2124megaraid_ack_sequence(adapter_t *adapter) 2125{ 2126 mraid_device_t *raid_dev = ADAP2RAIDDEV(adapter); 2127 mbox_t *mbox; 2128 scb_t *scb; 2129 uint8_t nstatus; 2130 uint8_t completed[MBOX_MAX_FIRMWARE_STATUS]; 2131 struct list_head clist; 2132 int handled; 2133 uint32_t dword; 2134 unsigned long flags; 2135 int i, j; 2136 2137 2138 mbox = raid_dev->mbox; 2139 2140 // move the SCBs from the firmware completed array to our local list 2141 INIT_LIST_HEAD(&clist); 2142 2143 // loop till F/W has more commands for us to complete 2144 handled = 0; 2145 spin_lock_irqsave(MAILBOX_LOCK(raid_dev), flags); 2146 do { 2147 /* 2148 * Check if a valid interrupt is pending. If found, force the 2149 * interrupt line low. 2150 */ 2151 dword = RDOUTDOOR(raid_dev); 2152 if (dword != 0x10001234) break; 2153 2154 handled = 1; 2155 2156 WROUTDOOR(raid_dev, 0x10001234); 2157 2158 nstatus = 0; 2159 // wait for valid numstatus to post 2160 for (i = 0; i < 0xFFFFF; i++) { 2161 if (mbox->numstatus != 0xFF) { 2162 nstatus = mbox->numstatus; 2163 break; 2164 } 2165 rmb(); 2166 } 2167 mbox->numstatus = 0xFF; 2168 2169 adapter->outstanding_cmds -= nstatus; 2170 2171 for (i = 0; i < nstatus; i++) { 2172 2173 // wait for valid command index to post 2174 for (j = 0; j < 0xFFFFF; j++) { 2175 if (mbox->completed[i] != 0xFF) break; 2176 rmb(); 2177 } 2178 completed[i] = mbox->completed[i]; 2179 mbox->completed[i] = 0xFF; 2180 2181 if (completed[i] == 0xFF) { 2182 con_log(CL_ANN, (KERN_CRIT 2183 "megaraid: command posting timed out\n")); 2184 2185 BUG(); 2186 continue; 2187 } 2188 2189 // Get SCB associated with this command id 2190 if (completed[i] >= MBOX_MAX_SCSI_CMDS) { 2191 // a cmm command 2192 scb = adapter->uscb_list + (completed[i] - 2193 MBOX_MAX_SCSI_CMDS); 2194 } 2195 else { 2196 // an os command 2197 scb = adapter->kscb_list + completed[i]; 2198 } 2199 2200 scb->status = mbox->status; 2201 list_add_tail(&scb->list, &clist); 2202 } 2203 2204 // Acknowledge interrupt 2205 WRINDOOR(raid_dev, 0x02); 2206 2207 } while(1); 2208 2209 spin_unlock_irqrestore(MAILBOX_LOCK(raid_dev), flags); 2210 2211 2212 // put the completed commands in the completed list. DPC would 2213 // complete these commands later 2214 spin_lock_irqsave(COMPLETED_LIST_LOCK(adapter), flags); 2215 2216 list_splice(&clist, &adapter->completed_list); 2217 2218 spin_unlock_irqrestore(COMPLETED_LIST_LOCK(adapter), flags); 2219 2220 2221 // schedule the DPC if there is some work for it 2222 if (handled) 2223 tasklet_schedule(&adapter->dpc_h); 2224 2225 return handled; 2226} 2227 2228 2229/** 2230 * megaraid_isr - isr for memory based mailbox based controllers 2231 * @irq : irq 2232 * @devp : pointer to our soft state 2233 * 2234 * Interrupt service routine for memory-mapped mailbox controllers. 2235 */ 2236static irqreturn_t 2237megaraid_isr(int irq, void *devp) 2238{ 2239 adapter_t *adapter = devp; 2240 int handled; 2241 2242 handled = megaraid_ack_sequence(adapter); 2243 2244 /* Loop through any pending requests */ 2245 if (!adapter->quiescent) { 2246 megaraid_mbox_runpendq(adapter, NULL); 2247 } 2248 2249 return IRQ_RETVAL(handled); 2250} 2251 2252 2253/** 2254 * megaraid_mbox_sync_scb - sync kernel buffers 2255 * @adapter : controller's soft state 2256 * @scb : pointer to the resource packet 2257 * 2258 * DMA sync if required. 2259 */ 2260static void 2261megaraid_mbox_sync_scb(adapter_t *adapter, scb_t *scb) 2262{ 2263 mbox_ccb_t *ccb; 2264 2265 ccb = (mbox_ccb_t *)scb->ccb; 2266 2267 switch (scb->dma_type) { 2268 2269 case MRAID_DMA_WBUF: 2270 if (scb->dma_direction == PCI_DMA_FROMDEVICE) { 2271 pci_dma_sync_single_for_cpu(adapter->pdev, 2272 ccb->buf_dma_h, 2273 scb->scp->request_bufflen, 2274 PCI_DMA_FROMDEVICE); 2275 } 2276 2277 pci_unmap_page(adapter->pdev, ccb->buf_dma_h, 2278 scb->scp->request_bufflen, scb->dma_direction); 2279 2280 break; 2281 2282 case MRAID_DMA_WSG: 2283 if (scb->dma_direction == PCI_DMA_FROMDEVICE) { 2284 pci_dma_sync_sg_for_cpu(adapter->pdev, 2285 scb->scp->request_buffer, 2286 scb->scp->use_sg, PCI_DMA_FROMDEVICE); 2287 } 2288 2289 pci_unmap_sg(adapter->pdev, scb->scp->request_buffer, 2290 scb->scp->use_sg, scb->dma_direction); 2291 2292 break; 2293 2294 default: 2295 break; 2296 } 2297 2298 return; 2299} 2300 2301 2302/** 2303 * megaraid_mbox_dpc - the tasklet to complete the commands from completed list 2304 * @devp : pointer to HBA soft state 2305 * 2306 * Pick up the commands from the completed list and send back to the owners. 2307 * This is a reentrant function and does not assume any locks are held while 2308 * it is being called. 2309 */ 2310static void 2311megaraid_mbox_dpc(unsigned long devp) 2312{ 2313 adapter_t *adapter = (adapter_t *)devp; 2314 mraid_device_t *raid_dev; 2315 struct list_head clist; 2316 struct scatterlist *sgl; 2317 scb_t *scb; 2318 scb_t *tmp; 2319 struct scsi_cmnd *scp; 2320 mraid_passthru_t *pthru; 2321 mraid_epassthru_t *epthru; 2322 mbox_ccb_t *ccb; 2323 int islogical; 2324 int pdev_index; 2325 int pdev_state; 2326 mbox_t *mbox; 2327 unsigned long flags; 2328 uint8_t c; 2329 int status; 2330 uioc_t *kioc; 2331 2332 2333 if (!adapter) return; 2334 2335 raid_dev = ADAP2RAIDDEV(adapter); 2336 2337 // move the SCBs from the completed list to our local list 2338 INIT_LIST_HEAD(&clist); 2339 2340 spin_lock_irqsave(COMPLETED_LIST_LOCK(adapter), flags); 2341 2342 list_splice_init(&adapter->completed_list, &clist); 2343 2344 spin_unlock_irqrestore(COMPLETED_LIST_LOCK(adapter), flags); 2345 2346 2347 list_for_each_entry_safe(scb, tmp, &clist, list) { 2348 2349 status = scb->status; 2350 scp = scb->scp; 2351 ccb = (mbox_ccb_t *)scb->ccb; 2352 pthru = ccb->pthru; 2353 epthru = ccb->epthru; 2354 mbox = ccb->mbox; 2355 2356 // Make sure f/w has completed a valid command 2357 if (scb->state != SCB_ISSUED) { 2358 con_log(CL_ANN, (KERN_CRIT 2359 "megaraid critical err: invalid command %d:%d:%p\n", 2360 scb->sno, scb->state, scp)); 2361 BUG(); 2362 continue; // Must never happen! 2363 } 2364 2365 // check for the management command and complete it right away 2366 if (scb->sno >= MBOX_MAX_SCSI_CMDS) { 2367 scb->state = SCB_FREE; 2368 scb->status = status; 2369 2370 // remove from local clist 2371 list_del_init(&scb->list); 2372 2373 kioc = (uioc_t *)scb->gp; 2374 kioc->status = 0; 2375 2376 megaraid_mbox_mm_done(adapter, scb); 2377 2378 continue; 2379 } 2380 2381 // Was an abort issued for this command earlier 2382 if (scb->state & SCB_ABORT) { 2383 con_log(CL_ANN, (KERN_NOTICE 2384 "megaraid: aborted cmd %lx[%x] completed\n", 2385 scp->serial_number, scb->sno)); 2386 } 2387 2388 /* 2389 * If the inquiry came of a disk drive which is not part of 2390 * any RAID array, expose it to the kernel. For this to be 2391 * enabled, user must set the "megaraid_expose_unconf_disks" 2392 * flag to 1 by specifying it on module parameter list. 2393 * This would enable data migration off drives from other 2394 * configurations. 2395 */ 2396 islogical = MRAID_IS_LOGICAL(adapter, scp); 2397 if (scp->cmnd[0] == INQUIRY && status == 0 && islogical == 0 2398 && IS_RAID_CH(raid_dev, scb->dev_channel)) { 2399 2400 if (scp->use_sg) { 2401 sgl = (struct scatterlist *) 2402 scp->request_buffer; 2403 2404 if (sgl->page) { 2405 c = *(unsigned char *) 2406 (page_address((&sgl[0])->page) + 2407 (&sgl[0])->offset); 2408 } 2409 else { 2410 con_log(CL_ANN, (KERN_WARNING 2411 "megaraid mailbox: invalid sg:%d\n", 2412 __LINE__)); 2413 c = 0; 2414 } 2415 } 2416 else { 2417 c = *(uint8_t *)scp->request_buffer; 2418 } 2419 2420 if ((c & 0x1F ) == TYPE_DISK) { 2421 pdev_index = (scb->dev_channel * 16) + 2422 scb->dev_target; 2423 pdev_state = 2424 raid_dev->pdrv_state[pdev_index] & 0x0F; 2425 2426 if (pdev_state == PDRV_ONLINE || 2427 pdev_state == PDRV_FAILED || 2428 pdev_state == PDRV_RBLD || 2429 pdev_state == PDRV_HOTSPARE || 2430 megaraid_expose_unconf_disks == 0) { 2431 2432 status = 0xF0; 2433 } 2434 } 2435 } 2436 2437 // Convert MegaRAID status to Linux error code 2438 switch (status) { 2439 2440 case 0x00: 2441 2442 scp->result = (DID_OK << 16); 2443 break; 2444 2445 case 0x02: 2446 2447 /* set sense_buffer and result fields */ 2448 if (mbox->cmd == MBOXCMD_PASSTHRU || 2449 mbox->cmd == MBOXCMD_PASSTHRU64) { 2450 2451 memcpy(scp->sense_buffer, pthru->reqsensearea, 2452 14); 2453 2454 scp->result = DRIVER_SENSE << 24 | 2455 DID_OK << 16 | CHECK_CONDITION << 1; 2456 } 2457 else { 2458 if (mbox->cmd == MBOXCMD_EXTPTHRU) { 2459 2460 memcpy(scp->sense_buffer, 2461 epthru->reqsensearea, 14); 2462 2463 scp->result = DRIVER_SENSE << 24 | 2464 DID_OK << 16 | 2465 CHECK_CONDITION << 1; 2466 } else { 2467 scp->sense_buffer[0] = 0x70; 2468 scp->sense_buffer[2] = ABORTED_COMMAND; 2469 scp->result = CHECK_CONDITION << 1; 2470 } 2471 } 2472 break; 2473 2474 case 0x08: 2475 2476 scp->result = DID_BUS_BUSY << 16 | status; 2477 break; 2478 2479 default: 2480 2481 /* 2482 * If TEST_UNIT_READY fails, we know RESERVATION_STATUS 2483 * failed 2484 */ 2485 if (scp->cmnd[0] == TEST_UNIT_READY) { 2486 scp->result = DID_ERROR << 16 | 2487 RESERVATION_CONFLICT << 1; 2488 } 2489 else 2490 /* 2491 * Error code returned is 1 if Reserve or Release 2492 * failed or the input parameter is invalid 2493 */ 2494 if (status == 1 && (scp->cmnd[0] == RESERVE || 2495 scp->cmnd[0] == RELEASE)) { 2496 2497 scp->result = DID_ERROR << 16 | 2498 RESERVATION_CONFLICT << 1; 2499 } 2500 else { 2501 scp->result = DID_BAD_TARGET << 16 | status; 2502 } 2503 } 2504 2505 // print a debug message for all failed commands 2506 if (status) { 2507 megaraid_mbox_display_scb(adapter, scb); 2508 } 2509 2510 // Free our internal resources and call the mid-layer callback 2511 // routine 2512 megaraid_mbox_sync_scb(adapter, scb); 2513 2514 // remove from local clist 2515 list_del_init(&scb->list); 2516 2517 // put back in free list 2518 megaraid_dealloc_scb(adapter, scb); 2519 2520 // send the scsi packet back to kernel 2521 scp->scsi_done(scp); 2522 } 2523 2524 return; 2525} 2526 2527 2528/** 2529 * megaraid_abort_handler - abort the scsi command 2530 * @scp : command to be aborted 2531 * 2532 * Abort a previous SCSI request. Only commands on the pending list can be 2533 * aborted. All the commands issued to the F/W must complete. 2534 **/ 2535static int 2536megaraid_abort_handler(struct scsi_cmnd *scp) 2537{ 2538 adapter_t *adapter; 2539 mraid_device_t *raid_dev; 2540 scb_t *scb; 2541 scb_t *tmp; 2542 int found; 2543 unsigned long flags; 2544 int i; 2545 2546 2547 adapter = SCP2ADAPTER(scp); 2548 raid_dev = ADAP2RAIDDEV(adapter); 2549 2550 con_log(CL_ANN, (KERN_WARNING 2551 "megaraid: aborting-%ld cmd=%x <c=%d t=%d l=%d>\n", 2552 scp->serial_number, scp->cmnd[0], SCP2CHANNEL(scp), 2553 SCP2TARGET(scp), SCP2LUN(scp))); 2554 2555 // If FW has stopped responding, simply return failure 2556 if (raid_dev->hw_error) { 2557 con_log(CL_ANN, (KERN_NOTICE 2558 "megaraid: hw error, not aborting\n")); 2559 return FAILED; 2560 } 2561 2562 // There might a race here, where the command was completed by the 2563 // firmware and now it is on the completed list. Before we could 2564 // complete the command to the kernel in dpc, the abort came. 2565 // Find out if this is the case to avoid the race. 2566 scb = NULL; 2567 spin_lock_irqsave(COMPLETED_LIST_LOCK(adapter), flags); 2568 list_for_each_entry_safe(scb, tmp, &adapter->completed_list, list) { 2569 2570 if (scb->scp == scp) { // Found command 2571 2572 list_del_init(&scb->list); // from completed list 2573 2574 con_log(CL_ANN, (KERN_WARNING 2575 "megaraid: %ld:%d[%d:%d], abort from completed list\n", 2576 scp->serial_number, scb->sno, 2577 scb->dev_channel, scb->dev_target)); 2578 2579 scp->result = (DID_ABORT << 16); 2580 scp->scsi_done(scp); 2581 2582 megaraid_dealloc_scb(adapter, scb); 2583 2584 spin_unlock_irqrestore(COMPLETED_LIST_LOCK(adapter), 2585 flags); 2586 2587 return SUCCESS; 2588 } 2589 } 2590 spin_unlock_irqrestore(COMPLETED_LIST_LOCK(adapter), flags); 2591 2592 2593 // Find out if this command is still on the pending list. If it is and 2594 // was never issued, abort and return success. If the command is owned 2595 // by the firmware, we must wait for it to complete by the FW. 2596 spin_lock_irqsave(PENDING_LIST_LOCK(adapter), flags); 2597 list_for_each_entry_safe(scb, tmp, &adapter->pend_list, list) { 2598 2599 if (scb->scp == scp) { // Found command 2600 2601 list_del_init(&scb->list); // from pending list 2602 2603 ASSERT(!(scb->state & SCB_ISSUED)); 2604 2605 con_log(CL_ANN, (KERN_WARNING 2606 "megaraid abort: %ld[%d:%d], driver owner\n", 2607 scp->serial_number, scb->dev_channel, 2608 scb->dev_target)); 2609 2610 scp->result = (DID_ABORT << 16); 2611 scp->scsi_done(scp); 2612 2613 megaraid_dealloc_scb(adapter, scb); 2614 2615 spin_unlock_irqrestore(PENDING_LIST_LOCK(adapter), 2616 flags); 2617 2618 return SUCCESS; 2619 } 2620 } 2621 spin_unlock_irqrestore(PENDING_LIST_LOCK(adapter), flags); 2622 2623 2624 // Check do we even own this command, in which case this would be 2625 // owned by the firmware. The only way to locate the FW scb is to 2626 // traverse through the list of all SCB, since driver does not 2627 // maintain these SCBs on any list 2628 found = 0; 2629 spin_lock_irq(&adapter->lock); 2630 for (i = 0; i < MBOX_MAX_SCSI_CMDS; i++) { 2631 scb = adapter->kscb_list + i; 2632 2633 if (scb->scp == scp) { 2634 2635 found = 1; 2636 2637 if (!(scb->state & SCB_ISSUED)) { 2638 con_log(CL_ANN, (KERN_WARNING 2639 "megaraid abort: %ld%d[%d:%d], invalid state\n", 2640 scp->serial_number, scb->sno, scb->dev_channel, 2641 scb->dev_target)); 2642 BUG(); 2643 } 2644 else { 2645 con_log(CL_ANN, (KERN_WARNING 2646 "megaraid abort: %ld:%d[%d:%d], fw owner\n", 2647 scp->serial_number, scb->sno, scb->dev_channel, 2648 scb->dev_target)); 2649 } 2650 } 2651 } 2652 spin_unlock_irq(&adapter->lock); 2653 2654 if (!found) { 2655 con_log(CL_ANN, (KERN_WARNING 2656 "megaraid abort: scsi cmd:%ld, do now own\n", 2657 scp->serial_number)); 2658 2659 return SUCCESS; 2660 } 2661 2662 // We cannot actually abort a command owned by firmware, return 2663 // failure and wait for reset. In host reset handler, we will find out 2664 // if the HBA is still live 2665 return FAILED; 2666} 2667 2668/** 2669 * megaraid_reset_handler - device reset hadler for mailbox based driver 2670 * @scp : reference command 2671 * 2672 * Reset handler for the mailbox based controller. First try to find out if 2673 * the FW is still live, in which case the outstanding commands counter mut go 2674 * down to 0. If that happens, also issue the reservation reset command to 2675 * relinquish (possible) reservations on the logical drives connected to this 2676 * host. 2677 **/ 2678static int 2679megaraid_reset_handler(struct scsi_cmnd *scp) 2680{ 2681 adapter_t *adapter; 2682 scb_t *scb; 2683 scb_t *tmp; 2684 mraid_device_t *raid_dev; 2685 unsigned long flags; 2686 uint8_t raw_mbox[sizeof(mbox_t)]; 2687 int rval; 2688 int recovery_window; 2689 int recovering; 2690 int i; 2691 uioc_t *kioc; 2692 2693 adapter = SCP2ADAPTER(scp); 2694 raid_dev = ADAP2RAIDDEV(adapter); 2695 2696 // return failure if adapter is not responding 2697 if (raid_dev->hw_error) { 2698 con_log(CL_ANN, (KERN_NOTICE 2699 "megaraid: hw error, cannot reset\n")); 2700 return FAILED; 2701 } 2702 2703 2704 // Under exceptional conditions, FW can take up to 3 minutes to 2705 // complete command processing. Wait for additional 2 minutes for the 2706 // pending commands counter to go down to 0. If it doesn't, let the 2707 // controller be marked offline 2708 // Also, reset all the commands currently owned by the driver 2709 spin_lock_irqsave(PENDING_LIST_LOCK(adapter), flags); 2710 list_for_each_entry_safe(scb, tmp, &adapter->pend_list, list) { 2711 list_del_init(&scb->list); // from pending list 2712 2713 if (scb->sno >= MBOX_MAX_SCSI_CMDS) { 2714 con_log(CL_ANN, (KERN_WARNING 2715 "megaraid: IOCTL packet with %d[%d:%d] being reset\n", 2716 scb->sno, scb->dev_channel, scb->dev_target)); 2717 2718 scb->status = -1; 2719 2720 kioc = (uioc_t *)scb->gp; 2721 kioc->status = -EFAULT; 2722 2723 megaraid_mbox_mm_done(adapter, scb); 2724 } else { 2725 if (scb->scp == scp) { // Found command 2726 con_log(CL_ANN, (KERN_WARNING 2727 "megaraid: %ld:%d[%d:%d], reset from pending list\n", 2728 scp->serial_number, scb->sno, 2729 scb->dev_channel, scb->dev_target)); 2730 } else { 2731 con_log(CL_ANN, (KERN_WARNING 2732 "megaraid: IO packet with %d[%d:%d] being reset\n", 2733 scb->sno, scb->dev_channel, scb->dev_target)); 2734 } 2735 2736 scb->scp->result = (DID_RESET << 16); 2737 scb->scp->scsi_done(scb->scp); 2738 2739 megaraid_dealloc_scb(adapter, scb); 2740 } 2741 } 2742 spin_unlock_irqrestore(PENDING_LIST_LOCK(adapter), flags); 2743 2744 if (adapter->outstanding_cmds) { 2745 con_log(CL_ANN, (KERN_NOTICE 2746 "megaraid: %d outstanding commands. Max wait %d sec\n", 2747 adapter->outstanding_cmds, 2748 (MBOX_RESET_WAIT + MBOX_RESET_EXT_WAIT))); 2749 } 2750 2751 recovery_window = MBOX_RESET_WAIT + MBOX_RESET_EXT_WAIT; 2752 2753 recovering = adapter->outstanding_cmds; 2754 2755 for (i = 0; i < recovery_window; i++) { 2756 2757 megaraid_ack_sequence(adapter); 2758 2759 // print a message once every 5 seconds only 2760 if (!(i % 5)) { 2761 con_log(CL_ANN, ( 2762 "megaraid mbox: Wait for %d commands to complete:%d\n", 2763 adapter->outstanding_cmds, 2764 (MBOX_RESET_WAIT + MBOX_RESET_EXT_WAIT) - i)); 2765 } 2766 2767 // bailout if no recovery happended in reset time 2768 if (adapter->outstanding_cmds == 0) { 2769 break; 2770 } 2771 2772 msleep(1000); 2773 } 2774 2775 spin_lock(&adapter->lock); 2776 2777 // If still outstanding commands, bail out 2778 if (adapter->outstanding_cmds) { 2779 con_log(CL_ANN, (KERN_WARNING 2780 "megaraid mbox: critical hardware error!\n")); 2781 2782 raid_dev->hw_error = 1; 2783 2784 rval = FAILED; 2785 goto out; 2786 } 2787 else { 2788 con_log(CL_ANN, (KERN_NOTICE 2789 "megaraid mbox: reset sequence completed sucessfully\n")); 2790 } 2791 2792 2793 // If the controller supports clustering, reset reservations 2794 if (!adapter->ha) { 2795 rval = SUCCESS; 2796 goto out; 2797 } 2798 2799 // clear reservations if any 2800 raw_mbox[0] = CLUSTER_CMD; 2801 raw_mbox[2] = RESET_RESERVATIONS; 2802 2803 rval = SUCCESS; 2804 if (mbox_post_sync_cmd_fast(adapter, raw_mbox) == 0) { 2805 con_log(CL_ANN, 2806 (KERN_INFO "megaraid: reservation reset\n")); 2807 } 2808 else { 2809 rval = FAILED; 2810 con_log(CL_ANN, (KERN_WARNING 2811 "megaraid: reservation reset failed\n")); 2812 } 2813 2814 out: 2815 spin_unlock_irq(&adapter->lock); 2816 return rval; 2817} 2818 2819/* 2820 * START: internal commands library 2821 * 2822 * This section of the driver has the common routine used by the driver and 2823 * also has all the FW routines 2824 */ 2825 2826/** 2827 * mbox_post_sync_cmd() - blocking command to the mailbox based controllers 2828 * @adapter : controller's soft state 2829 * @raw_mbox : the mailbox 2830 * 2831 * Issue a scb in synchronous and non-interrupt mode for mailbox based 2832 * controllers. 2833 */ 2834static int 2835mbox_post_sync_cmd(adapter_t *adapter, uint8_t raw_mbox[]) 2836{ 2837 mraid_device_t *raid_dev = ADAP2RAIDDEV(adapter); 2838 mbox64_t *mbox64; 2839 mbox_t *mbox; 2840 uint8_t status; 2841 int i; 2842 2843 2844 mbox64 = raid_dev->mbox64; 2845 mbox = raid_dev->mbox; 2846 2847 /* 2848 * Wait until mailbox is free 2849 */ 2850 if (megaraid_busywait_mbox(raid_dev) != 0) 2851 goto blocked_mailbox; 2852 2853 /* 2854 * Copy mailbox data into host structure 2855 */ 2856 memcpy((caddr_t)mbox, (caddr_t)raw_mbox, 16); 2857 mbox->cmdid = 0xFE; 2858 mbox->busy = 1; 2859 mbox->poll = 0; 2860 mbox->ack = 0; 2861 mbox->numstatus = 0xFF; 2862 mbox->status = 0xFF; 2863 2864 wmb(); 2865 WRINDOOR(raid_dev, raid_dev->mbox_dma | 0x1); 2866 2867 // wait for maximum 1 second for status to post. If the status is not 2868 // available within 1 second, assume FW is initializing and wait 2869 // for an extended amount of time 2870 if (mbox->numstatus == 0xFF) { // status not yet available 2871 udelay(25); 2872 2873 for (i = 0; mbox->numstatus == 0xFF && i < 1000; i++) { 2874 rmb(); 2875 msleep(1); 2876 } 2877 2878 2879 if (i == 1000) { 2880 con_log(CL_ANN, (KERN_NOTICE 2881 "megaraid mailbox: wait for FW to boot ")); 2882 2883 for (i = 0; (mbox->numstatus == 0xFF) && 2884 (i < MBOX_RESET_WAIT); i++) { 2885 rmb(); 2886 con_log(CL_ANN, ("\b\b\b\b\b[%03d]", 2887 MBOX_RESET_WAIT - i)); 2888 msleep(1000); 2889 } 2890 2891 if (i == MBOX_RESET_WAIT) { 2892 2893 con_log(CL_ANN, ( 2894 "\nmegaraid mailbox: status not available\n")); 2895 2896 return -1; 2897 } 2898 con_log(CL_ANN, ("\b\b\b\b\b[ok] \n")); 2899 } 2900 } 2901 2902 // wait for maximum 1 second for poll semaphore 2903 if (mbox->poll != 0x77) { 2904 udelay(25); 2905 2906 for (i = 0; (mbox->poll != 0x77) && (i < 1000); i++) { 2907 rmb(); 2908 msleep(1); 2909 } 2910 2911 if (i == 1000) { 2912 con_log(CL_ANN, (KERN_WARNING 2913 "megaraid mailbox: could not get poll semaphore\n")); 2914 return -1; 2915 } 2916 } 2917 2918 WRINDOOR(raid_dev, raid_dev->mbox_dma | 0x2); 2919 wmb(); 2920 2921 // wait for maximum 1 second for acknowledgement 2922 if (RDINDOOR(raid_dev) & 0x2) { 2923 udelay(25); 2924 2925 for (i = 0; (RDINDOOR(raid_dev) & 0x2) && (i < 1000); i++) { 2926 rmb(); 2927 msleep(1); 2928 } 2929 2930 if (i == 1000) { 2931 con_log(CL_ANN, (KERN_WARNING 2932 "megaraid mailbox: could not acknowledge\n")); 2933 return -1; 2934 } 2935 } 2936 mbox->poll = 0; 2937 mbox->ack = 0x77; 2938 2939 status = mbox->status; 2940 2941 // invalidate the completed command id array. After command 2942 // completion, firmware would write the valid id. 2943 mbox->numstatus = 0xFF; 2944 mbox->status = 0xFF; 2945 for (i = 0; i < MBOX_MAX_FIRMWARE_STATUS; i++) { 2946 mbox->completed[i] = 0xFF; 2947 } 2948 2949 return status; 2950 2951blocked_mailbox: 2952 2953 con_log(CL_ANN, (KERN_WARNING "megaraid: blocked mailbox\n") ); 2954 return -1; 2955} 2956 2957 2958/** 2959 * mbox_post_sync_cmd_fast - blocking command to the mailbox based controllers 2960 * @adapter : controller's soft state 2961 * @raw_mbox : the mailbox 2962 * 2963 * Issue a scb in synchronous and non-interrupt mode for mailbox based 2964 * controllers. This is a faster version of the synchronous command and 2965 * therefore can be called in interrupt-context as well. 2966 */ 2967static int 2968mbox_post_sync_cmd_fast(adapter_t *adapter, uint8_t raw_mbox[]) 2969{ 2970 mraid_device_t *raid_dev = ADAP2RAIDDEV(adapter); 2971 mbox_t *mbox; 2972 long i; 2973 2974 2975 mbox = raid_dev->mbox; 2976 2977 // return immediately if the mailbox is busy 2978 if (mbox->busy) return -1; 2979 2980 // Copy mailbox data into host structure 2981 memcpy((caddr_t)mbox, (caddr_t)raw_mbox, 14); 2982 mbox->cmdid = 0xFE; 2983 mbox->busy = 1; 2984 mbox->poll = 0; 2985 mbox->ack = 0; 2986 mbox->numstatus = 0xFF; 2987 mbox->status = 0xFF; 2988 2989 wmb(); 2990 WRINDOOR(raid_dev, raid_dev->mbox_dma | 0x1); 2991 2992 for (i = 0; i < MBOX_SYNC_WAIT_CNT; i++) { 2993 if (mbox->numstatus != 0xFF) break; 2994 rmb(); 2995 udelay(MBOX_SYNC_DELAY_200); 2996 } 2997 2998 if (i == MBOX_SYNC_WAIT_CNT) { 2999 // We may need to re-calibrate the counter 3000 con_log(CL_ANN, (KERN_CRIT 3001 "megaraid: fast sync command timed out\n")); 3002 } 3003 3004 WRINDOOR(raid_dev, raid_dev->mbox_dma | 0x2); 3005 wmb(); 3006 3007 return mbox->status; 3008} 3009 3010 3011/** 3012 * megaraid_busywait_mbox() - Wait until the controller's mailbox is available 3013 * @raid_dev : RAID device (HBA) soft state 3014 * 3015 * Wait until the controller's mailbox is available to accept more commands. 3016 * Wait for at most 1 second. 3017 */ 3018static int 3019megaraid_busywait_mbox(mraid_device_t *raid_dev) 3020{ 3021 mbox_t *mbox = raid_dev->mbox; 3022 int i = 0; 3023 3024 if (mbox->busy) { 3025 udelay(25); 3026 for (i = 0; mbox->busy && i < 1000; i++) 3027 msleep(1); 3028 } 3029 3030 if (i < 1000) return 0; 3031 else return -1; 3032} 3033 3034 3035/** 3036 * megaraid_mbox_product_info - some static information about the controller 3037 * @adapter : our soft state 3038 * 3039 * Issue commands to the controller to grab some parameters required by our 3040 * caller. 3041 */ 3042static int 3043megaraid_mbox_product_info(adapter_t *adapter) 3044{ 3045 mraid_device_t *raid_dev = ADAP2RAIDDEV(adapter); 3046 mbox_t *mbox; 3047 uint8_t raw_mbox[sizeof(mbox_t)]; 3048 mraid_pinfo_t *pinfo; 3049 dma_addr_t pinfo_dma_h; 3050 mraid_inquiry3_t *mraid_inq3; 3051 int i; 3052 3053 3054 memset((caddr_t)raw_mbox, 0, sizeof(raw_mbox)); 3055 mbox = (mbox_t *)raw_mbox; 3056 3057 /* 3058 * Issue an ENQUIRY3 command to find out certain adapter parameters, 3059 * e.g., max channels, max commands etc. 3060 */ 3061 pinfo = pci_alloc_consistent(adapter->pdev, sizeof(mraid_pinfo_t), 3062 &pinfo_dma_h); 3063 3064 if (pinfo == NULL) { 3065 con_log(CL_ANN, (KERN_WARNING 3066 "megaraid: out of memory, %s %d\n", __FUNCTION__, 3067 __LINE__)); 3068 3069 return -1; 3070 } 3071 memset(pinfo, 0, sizeof(mraid_pinfo_t)); 3072 3073 mbox->xferaddr = (uint32_t)adapter->ibuf_dma_h; 3074 memset((void *)adapter->ibuf, 0, MBOX_IBUF_SIZE); 3075 3076 raw_mbox[0] = FC_NEW_CONFIG; 3077 raw_mbox[2] = NC_SUBOP_ENQUIRY3; 3078 raw_mbox[3] = ENQ3_GET_SOLICITED_FULL; 3079 3080 // Issue the command 3081 if (mbox_post_sync_cmd(adapter, raw_mbox) != 0) { 3082 3083 con_log(CL_ANN, (KERN_WARNING "megaraid: Inquiry3 failed\n")); 3084 3085 pci_free_consistent(adapter->pdev, sizeof(mraid_pinfo_t), 3086 pinfo, pinfo_dma_h); 3087 3088 return -1; 3089 } 3090 3091 /* 3092 * Collect information about state of each physical drive 3093 * attached to the controller. We will expose all the disks 3094 * which are not part of RAID 3095 */ 3096 mraid_inq3 = (mraid_inquiry3_t *)adapter->ibuf; 3097 for (i = 0; i < MBOX_MAX_PHYSICAL_DRIVES; i++) { 3098 raid_dev->pdrv_state[i] = mraid_inq3->pdrv_state[i]; 3099 } 3100 3101 /* 3102 * Get product info for information like number of channels, 3103 * maximum commands supported. 3104 */ 3105 memset((caddr_t)raw_mbox, 0, sizeof(raw_mbox)); 3106 mbox->xferaddr = (uint32_t)pinfo_dma_h; 3107 3108 raw_mbox[0] = FC_NEW_CONFIG; 3109 raw_mbox[2] = NC_SUBOP_PRODUCT_INFO; 3110 3111 if (mbox_post_sync_cmd(adapter, raw_mbox) != 0) { 3112 3113 con_log(CL_ANN, (KERN_WARNING 3114 "megaraid: product info failed\n")); 3115 3116 pci_free_consistent(adapter->pdev, sizeof(mraid_pinfo_t), 3117 pinfo, pinfo_dma_h); 3118 3119 return -1; 3120 } 3121 3122 /* 3123 * Setup some parameters for host, as required by our caller 3124 */ 3125 adapter->max_channel = pinfo->nchannels; 3126 3127 /* 3128 * we will export all the logical drives on a single channel. 3129 * Add 1 since inquires do not come for inititor ID 3130 */ 3131 adapter->max_target = MAX_LOGICAL_DRIVES_40LD + 1; 3132 adapter->max_lun = 8; // up to 8 LUNs for non-disk devices 3133 3134 /* 3135 * These are the maximum outstanding commands for the scsi-layer 3136 */ 3137 adapter->max_cmds = MBOX_MAX_SCSI_CMDS; 3138 3139 memset(adapter->fw_version, 0, VERSION_SIZE); 3140 memset(adapter->bios_version, 0, VERSION_SIZE); 3141 3142 memcpy(adapter->fw_version, pinfo->fw_version, 4); 3143 adapter->fw_version[4] = 0; 3144 3145 memcpy(adapter->bios_version, pinfo->bios_version, 4); 3146 adapter->bios_version[4] = 0; 3147 3148 con_log(CL_ANN, (KERN_NOTICE 3149 "megaraid: fw version:[%s] bios version:[%s]\n", 3150 adapter->fw_version, adapter->bios_version)); 3151 3152 pci_free_consistent(adapter->pdev, sizeof(mraid_pinfo_t), pinfo, 3153 pinfo_dma_h); 3154 3155 return 0; 3156} 3157 3158 3159 3160/** 3161 * megaraid_mbox_extended_cdb - check for support for extended CDBs 3162 * @adapter : soft state for the controller 3163 * 3164 * This routine check whether the controller in question supports extended 3165 * ( > 10 bytes ) CDBs. 3166 */ 3167static int 3168megaraid_mbox_extended_cdb(adapter_t *adapter) 3169{ 3170 mbox_t *mbox; 3171 uint8_t raw_mbox[sizeof(mbox_t)]; 3172 int rval; 3173 3174 mbox = (mbox_t *)raw_mbox; 3175 3176 memset((caddr_t)raw_mbox, 0, sizeof(raw_mbox)); 3177 mbox->xferaddr = (uint32_t)adapter->ibuf_dma_h; 3178 3179 memset((void *)adapter->ibuf, 0, MBOX_IBUF_SIZE); 3180 3181 raw_mbox[0] = MAIN_MISC_OPCODE; 3182 raw_mbox[2] = SUPPORT_EXT_CDB; 3183 3184 /* 3185 * Issue the command 3186 */ 3187 rval = 0; 3188 if (mbox_post_sync_cmd(adapter, raw_mbox) != 0) { 3189 rval = -1; 3190 } 3191 3192 return rval; 3193} 3194 3195 3196/** 3197 * megaraid_mbox_support_ha - Do we support clustering 3198 * @adapter : soft state for the controller 3199 * @init_id : ID of the initiator 3200 * 3201 * Determine if the firmware supports clustering and the ID of the initiator. 3202 */ 3203static int 3204megaraid_mbox_support_ha(adapter_t *adapter, uint16_t *init_id) 3205{ 3206 mbox_t *mbox; 3207 uint8_t raw_mbox[sizeof(mbox_t)]; 3208 int rval; 3209 3210 3211 mbox = (mbox_t *)raw_mbox; 3212 3213 memset((caddr_t)raw_mbox, 0, sizeof(raw_mbox)); 3214 3215 mbox->xferaddr = (uint32_t)adapter->ibuf_dma_h; 3216 3217 memset((void *)adapter->ibuf, 0, MBOX_IBUF_SIZE); 3218 3219 raw_mbox[0] = GET_TARGET_ID; 3220 3221 // Issue the command 3222 *init_id = 7; 3223 rval = -1; 3224 if (mbox_post_sync_cmd(adapter, raw_mbox) == 0) { 3225 3226 *init_id = *(uint8_t *)adapter->ibuf; 3227 3228 con_log(CL_ANN, (KERN_INFO 3229 "megaraid: cluster firmware, initiator ID: %d\n", 3230 *init_id)); 3231 3232 rval = 0; 3233 } 3234 3235 return rval; 3236} 3237 3238 3239/** 3240 * megaraid_mbox_support_random_del - Do we support random deletion 3241 * @adapter : soft state for the controller 3242 * 3243 * Determine if the firmware supports random deletion. 3244 * Return: 1 is operation supported, 0 otherwise 3245 */ 3246static int 3247megaraid_mbox_support_random_del(adapter_t *adapter) 3248{ 3249 mbox_t *mbox; 3250 uint8_t raw_mbox[sizeof(mbox_t)]; 3251 int rval; 3252 3253 3254 mbox = (mbox_t *)raw_mbox; 3255 3256 memset((caddr_t)raw_mbox, 0, sizeof(mbox_t)); 3257 3258 raw_mbox[0] = FC_DEL_LOGDRV; 3259 raw_mbox[2] = OP_SUP_DEL_LOGDRV; 3260 3261 // Issue the command 3262 rval = 0; 3263 if (mbox_post_sync_cmd(adapter, raw_mbox) == 0) { 3264 3265 con_log(CL_DLEVEL1, ("megaraid: supports random deletion\n")); 3266 3267 rval = 1; 3268 } 3269 3270 return rval; 3271} 3272 3273 3274/** 3275 * megaraid_mbox_get_max_sg - maximum sg elements supported by the firmware 3276 * @adapter : soft state for the controller 3277 * 3278 * Find out the maximum number of scatter-gather elements supported by the 3279 * firmware. 3280 */ 3281static int 3282megaraid_mbox_get_max_sg(adapter_t *adapter) 3283{ 3284 mbox_t *mbox; 3285 uint8_t raw_mbox[sizeof(mbox_t)]; 3286 int nsg; 3287 3288 3289 mbox = (mbox_t *)raw_mbox; 3290 3291 memset((caddr_t)raw_mbox, 0, sizeof(mbox_t)); 3292 3293 mbox->xferaddr = (uint32_t)adapter->ibuf_dma_h; 3294 3295 memset((void *)adapter->ibuf, 0, MBOX_IBUF_SIZE); 3296 3297 raw_mbox[0] = MAIN_MISC_OPCODE; 3298 raw_mbox[2] = GET_MAX_SG_SUPPORT; 3299 3300 // Issue the command 3301 if (mbox_post_sync_cmd(adapter, raw_mbox) == 0) { 3302 nsg = *(uint8_t *)adapter->ibuf; 3303 } 3304 else { 3305 nsg = MBOX_DEFAULT_SG_SIZE; 3306 } 3307 3308 if (nsg > MBOX_MAX_SG_SIZE) nsg = MBOX_MAX_SG_SIZE; 3309 3310 return nsg; 3311} 3312 3313 3314/** 3315 * megaraid_mbox_enum_raid_scsi - enumerate the RAID and SCSI channels 3316 * @adapter : soft state for the controller 3317 * 3318 * Enumerate the RAID and SCSI channels for ROMB platforms so that channels 3319 * can be exported as regular SCSI channels. 3320 */ 3321static void 3322megaraid_mbox_enum_raid_scsi(adapter_t *adapter) 3323{ 3324 mraid_device_t *raid_dev = ADAP2RAIDDEV(adapter); 3325 mbox_t *mbox; 3326 uint8_t raw_mbox[sizeof(mbox_t)]; 3327 3328 3329 mbox = (mbox_t *)raw_mbox; 3330 3331 memset((caddr_t)raw_mbox, 0, sizeof(mbox_t)); 3332 3333 mbox->xferaddr = (uint32_t)adapter->ibuf_dma_h; 3334 3335 memset((void *)adapter->ibuf, 0, MBOX_IBUF_SIZE); 3336 3337 raw_mbox[0] = CHNL_CLASS; 3338 raw_mbox[2] = GET_CHNL_CLASS; 3339 3340 // Issue the command. If the command fails, all channels are RAID 3341 // channels 3342 raid_dev->channel_class = 0xFF; 3343 if (mbox_post_sync_cmd(adapter, raw_mbox) == 0) { 3344 raid_dev->channel_class = *(uint8_t *)adapter->ibuf; 3345 } 3346 3347 return; 3348} 3349 3350 3351/** 3352 * megaraid_mbox_flush_cache - flush adapter and disks cache 3353 * @adapter : soft state for the controller 3354 * 3355 * Flush adapter cache followed by disks cache. 3356 */ 3357static void 3358megaraid_mbox_flush_cache(adapter_t *adapter) 3359{ 3360 mbox_t *mbox; 3361 uint8_t raw_mbox[sizeof(mbox_t)]; 3362 3363 3364 mbox = (mbox_t *)raw_mbox; 3365 3366 memset((caddr_t)raw_mbox, 0, sizeof(mbox_t)); 3367 3368 raw_mbox[0] = FLUSH_ADAPTER; 3369 3370 if (mbox_post_sync_cmd(adapter, raw_mbox) != 0) { 3371 con_log(CL_ANN, ("megaraid: flush adapter failed\n")); 3372 } 3373 3374 raw_mbox[0] = FLUSH_SYSTEM; 3375 3376 if (mbox_post_sync_cmd(adapter, raw_mbox) != 0) { 3377 con_log(CL_ANN, ("megaraid: flush disks cache failed\n")); 3378 } 3379 3380 return; 3381} 3382 3383 3384/** 3385 * megaraid_mbox_fire_sync_cmd - fire the sync cmd 3386 * @adapter : soft state for the controller 3387 * 3388 * Clears the pending cmds in FW and reinits its RAID structs. 3389 */ 3390static int 3391megaraid_mbox_fire_sync_cmd(adapter_t *adapter) 3392{ 3393 mbox_t *mbox; 3394 uint8_t raw_mbox[sizeof(mbox_t)]; 3395 mraid_device_t *raid_dev = ADAP2RAIDDEV(adapter); 3396 mbox64_t *mbox64; 3397 int status = 0; 3398 int i; 3399 uint32_t dword; 3400 3401 mbox = (mbox_t *)raw_mbox; 3402 3403 memset((caddr_t)raw_mbox, 0, sizeof(mbox_t)); 3404 3405 raw_mbox[0] = 0xFF; 3406 3407 mbox64 = raid_dev->mbox64; 3408 mbox = raid_dev->mbox; 3409 3410 /* Wait until mailbox is free */ 3411 if (megaraid_busywait_mbox(raid_dev) != 0) { 3412 status = 1; 3413 goto blocked_mailbox; 3414 } 3415 3416 /* Copy mailbox data into host structure */ 3417 memcpy((caddr_t)mbox, (caddr_t)raw_mbox, 16); 3418 mbox->cmdid = 0xFE; 3419 mbox->busy = 1; 3420 mbox->poll = 0; 3421 mbox->ack = 0; 3422 mbox->numstatus = 0; 3423 mbox->status = 0; 3424 3425 wmb(); 3426 WRINDOOR(raid_dev, raid_dev->mbox_dma | 0x1); 3427 3428 /* Wait for maximum 1 min for status to post. 3429 * If the Firmware SUPPORTS the ABOVE COMMAND, 3430 * mbox->cmd will be set to 0 3431 * else 3432 * the firmware will reject the command with 3433 * mbox->numstatus set to 1 3434 */ 3435 3436 i = 0; 3437 status = 0; 3438 while (!mbox->numstatus && mbox->cmd == 0xFF) { 3439 rmb(); 3440 msleep(1); 3441 i++; 3442 if (i > 1000 * 60) { 3443 status = 1; 3444 break; 3445 } 3446 } 3447 if (mbox->numstatus == 1) 3448 status = 1; /*cmd not supported*/ 3449 3450 /* Check for interrupt line */ 3451 dword = RDOUTDOOR(raid_dev); 3452 WROUTDOOR(raid_dev, dword); 3453 WRINDOOR(raid_dev,2); 3454 3455 return status; 3456 3457blocked_mailbox: 3458 con_log(CL_ANN, (KERN_WARNING "megaraid: blocked mailbox\n")); 3459 return status; 3460} 3461 3462/** 3463 * megaraid_mbox_display_scb - display SCB information, mostly debug purposes 3464 * @adapter : controller's soft state 3465 * @scb : SCB to be displayed 3466 * @level : debug level for console print 3467 * 3468 * Diplay information about the given SCB iff the current debug level is 3469 * verbose. 3470 */ 3471static void 3472megaraid_mbox_display_scb(adapter_t *adapter, scb_t *scb) 3473{ 3474 mbox_ccb_t *ccb; 3475 struct scsi_cmnd *scp; 3476 mbox_t *mbox; 3477 int level; 3478 int i; 3479 3480 3481 ccb = (mbox_ccb_t *)scb->ccb; 3482 scp = scb->scp; 3483 mbox = ccb->mbox; 3484 3485 level = CL_DLEVEL3; 3486 3487 con_log(level, (KERN_NOTICE 3488 "megaraid mailbox: status:%#x cmd:%#x id:%#x ", scb->status, 3489 mbox->cmd, scb->sno)); 3490 3491 con_log(level, ("sec:%#x lba:%#x addr:%#x ld:%d sg:%d\n", 3492 mbox->numsectors, mbox->lba, mbox->xferaddr, mbox->logdrv, 3493 mbox->numsge)); 3494 3495 if (!scp) return; 3496 3497 con_log(level, (KERN_NOTICE "scsi cmnd: ")); 3498 3499 for (i = 0; i < scp->cmd_len; i++) { 3500 con_log(level, ("%#2.02x ", scp->cmnd[i])); 3501 } 3502 3503 con_log(level, ("\n")); 3504 3505 return; 3506} 3507 3508 3509/** 3510 * megaraid_mbox_setup_device_map - manage device ids 3511 * @adapter : Driver's soft state 3512 * 3513 * Manange the device ids to have an appropraite mapping between the kernel 3514 * scsi addresses and megaraid scsi and logical drive addresses. We export 3515 * scsi devices on their actual addresses, whereas the logical drives are 3516 * exported on a virtual scsi channel. 3517 */ 3518static void 3519megaraid_mbox_setup_device_map(adapter_t *adapter) 3520{ 3521 uint8_t c; 3522 uint8_t t; 3523 3524 /* 3525 * First fill the values on the logical drive channel 3526 */ 3527 for (t = 0; t < LSI_MAX_LOGICAL_DRIVES_64LD; t++) 3528 adapter->device_ids[adapter->max_channel][t] = 3529 (t < adapter->init_id) ? t : t - 1; 3530 3531 adapter->device_ids[adapter->max_channel][adapter->init_id] = 0xFF; 3532 3533 /* 3534 * Fill the values on the physical devices channels 3535 */ 3536 for (c = 0; c < adapter->max_channel; c++) 3537 for (t = 0; t < LSI_MAX_LOGICAL_DRIVES_64LD; t++) 3538 adapter->device_ids[c][t] = (c << 8) | t; 3539} 3540 3541 3542/* 3543 * END: internal commands library 3544 */ 3545 3546/* 3547 * START: Interface for the common management module 3548 * 3549 * This is the module, which interfaces with the common mangement module to 3550 * provide support for ioctl and sysfs 3551 */ 3552 3553/** 3554 * megaraid_cmm_register - register with the mangement module 3555 * @adapter : HBA soft state 3556 * 3557 * Register with the management module, which allows applications to issue 3558 * ioctl calls to the drivers. This interface is used by the management module 3559 * to setup sysfs support as well. 3560 */ 3561static int 3562megaraid_cmm_register(adapter_t *adapter) 3563{ 3564 mraid_device_t *raid_dev = ADAP2RAIDDEV(adapter); 3565 mraid_mmadp_t adp; 3566 scb_t *scb; 3567 mbox_ccb_t *ccb; 3568 int rval; 3569 int i; 3570 3571 // Allocate memory for the base list of scb for management module. 3572 adapter->uscb_list = kmalloc(sizeof(scb_t) * MBOX_MAX_USER_CMDS, 3573 GFP_KERNEL); 3574 3575 if (adapter->uscb_list == NULL) { 3576 con_log(CL_ANN, (KERN_WARNING 3577 "megaraid: out of memory, %s %d\n", __FUNCTION__, 3578 __LINE__)); 3579 return -1; 3580 } 3581 memset(adapter->uscb_list, 0, sizeof(scb_t) * MBOX_MAX_USER_CMDS); 3582 3583 3584 // Initialize the synchronization parameters for resources for 3585 // commands for management module 3586 INIT_LIST_HEAD(&adapter->uscb_pool); 3587 3588 spin_lock_init(USER_FREE_LIST_LOCK(adapter)); 3589 3590 3591 3592 // link all the packets. Note, CCB for commands, coming from the 3593 // commom management module, mailbox physical address are already 3594 // setup by it. We just need placeholder for that in our local command 3595 // control blocks 3596 for (i = 0; i < MBOX_MAX_USER_CMDS; i++) { 3597 3598 scb = adapter->uscb_list + i; 3599 ccb = raid_dev->uccb_list + i; 3600 3601 scb->ccb = (caddr_t)ccb; 3602 ccb->mbox64 = raid_dev->umbox64 + i; 3603 ccb->mbox = &ccb->mbox64->mbox32; 3604 ccb->raw_mbox = (uint8_t *)ccb->mbox; 3605 3606 scb->gp = 0; 3607 3608 // COMMAND ID 0 - (MBOX_MAX_SCSI_CMDS-1) ARE RESERVED FOR 3609 // COMMANDS COMING FROM IO SUBSYSTEM (MID-LAYER) 3610 scb->sno = i + MBOX_MAX_SCSI_CMDS; 3611 3612 scb->scp = NULL; 3613 scb->state = SCB_FREE; 3614 scb->dma_direction = PCI_DMA_NONE; 3615 scb->dma_type = MRAID_DMA_NONE; 3616 scb->dev_channel = -1; 3617 scb->dev_target = -1; 3618 3619 // put scb in the free pool 3620 list_add_tail(&scb->list, &adapter->uscb_pool); 3621 } 3622 3623 adp.unique_id = adapter->unique_id; 3624 adp.drvr_type = DRVRTYPE_MBOX; 3625 adp.drvr_data = (unsigned long)adapter; 3626 adp.pdev = adapter->pdev; 3627 adp.issue_uioc = megaraid_mbox_mm_handler; 3628 adp.timeout = MBOX_RESET_WAIT + MBOX_RESET_EXT_WAIT; 3629 adp.max_kioc = MBOX_MAX_USER_CMDS; 3630 3631 if ((rval = mraid_mm_register_adp(&adp)) != 0) { 3632 3633 con_log(CL_ANN, (KERN_WARNING 3634 "megaraid mbox: did not register with CMM\n")); 3635 3636 kfree(adapter->uscb_list); 3637 } 3638 3639 return rval; 3640} 3641 3642 3643static int 3644megaraid_cmm_unregister(adapter_t *adapter) 3645{ 3646 kfree(adapter->uscb_list); 3647 mraid_mm_unregister_adp(adapter->unique_id); 3648 return 0; 3649} 3650 3651 3652/** 3653 * megaraid_mbox_mm_handler - interface for CMM to issue commands to LLD 3654 * @drvr_data : LLD specific data 3655 * @kioc : CMM interface packet 3656 * @action : command action 3657 * 3658 * This routine is invoked whenever the Common Mangement Module (CMM) has a 3659 * command for us. The 'action' parameter specifies if this is a new command 3660 * or otherwise. 3661 */ 3662static int 3663megaraid_mbox_mm_handler(unsigned long drvr_data, uioc_t *kioc, uint32_t action) 3664{ 3665 adapter_t *adapter; 3666 3667 if (action != IOCTL_ISSUE) { 3668 con_log(CL_ANN, (KERN_WARNING 3669 "megaraid: unsupported management action:%#2x\n", 3670 action)); 3671 return (-ENOTSUPP); 3672 } 3673 3674 adapter = (adapter_t *)drvr_data; 3675 3676 // make sure this adapter is not being detached right now. 3677 if (atomic_read(&adapter->being_detached)) { 3678 con_log(CL_ANN, (KERN_WARNING 3679 "megaraid: reject management request, detaching\n")); 3680 return (-ENODEV); 3681 } 3682 3683 switch (kioc->opcode) { 3684 3685 case GET_ADAP_INFO: 3686 3687 kioc->status = gather_hbainfo(adapter, (mraid_hba_info_t *) 3688 (unsigned long)kioc->buf_vaddr); 3689 3690 kioc->done(kioc); 3691 3692 return kioc->status; 3693 3694 case MBOX_CMD: 3695 3696 return megaraid_mbox_mm_command(adapter, kioc); 3697 3698 default: 3699 kioc->status = (-EINVAL); 3700 kioc->done(kioc); 3701 return (-EINVAL); 3702 } 3703 3704 return 0; // not reached 3705} 3706 3707/** 3708 * megaraid_mbox_mm_command - issues commands routed through CMM 3709 * @adapter : HBA soft state 3710 * @kioc : management command packet 3711 * 3712 * Issues commands, which are routed through the management module. 3713 */ 3714static int 3715megaraid_mbox_mm_command(adapter_t *adapter, uioc_t *kioc) 3716{ 3717 struct list_head *head = &adapter->uscb_pool; 3718 mbox64_t *mbox64; 3719 uint8_t *raw_mbox; 3720 scb_t *scb; 3721 mbox_ccb_t *ccb; 3722 unsigned long flags; 3723 3724 // detach one scb from free pool 3725 spin_lock_irqsave(USER_FREE_LIST_LOCK(adapter), flags); 3726 3727 if (list_empty(head)) { // should never happen because of CMM 3728 3729 con_log(CL_ANN, (KERN_WARNING 3730 "megaraid mbox: bug in cmm handler, lost resources\n")); 3731 3732 spin_unlock_irqrestore(USER_FREE_LIST_LOCK(adapter), flags); 3733 3734 return (-EINVAL); 3735 } 3736 3737 scb = list_entry(head->next, scb_t, list); 3738 list_del_init(&scb->list); 3739 3740 spin_unlock_irqrestore(USER_FREE_LIST_LOCK(adapter), flags); 3741 3742 scb->state = SCB_ACTIVE; 3743 scb->dma_type = MRAID_DMA_NONE; 3744 scb->dma_direction = PCI_DMA_NONE; 3745 3746 ccb = (mbox_ccb_t *)scb->ccb; 3747 mbox64 = (mbox64_t *)(unsigned long)kioc->cmdbuf; 3748 raw_mbox = (uint8_t *)&mbox64->mbox32; 3749 3750 memcpy(ccb->mbox64, mbox64, sizeof(mbox64_t)); 3751 3752 scb->gp = (unsigned long)kioc; 3753 3754 /* 3755 * If it is a logdrv random delete operation, we have to wait till 3756 * there are no outstanding cmds at the fw and then issue it directly 3757 */ 3758 if (raw_mbox[0] == FC_DEL_LOGDRV && raw_mbox[2] == OP_DEL_LOGDRV) { 3759 3760 if (wait_till_fw_empty(adapter)) { 3761 con_log(CL_ANN, (KERN_NOTICE 3762 "megaraid mbox: LD delete, timed out\n")); 3763 3764 kioc->status = -ETIME; 3765 3766 scb->status = -1; 3767 3768 megaraid_mbox_mm_done(adapter, scb); 3769 3770 return (-ETIME); 3771 } 3772 3773 INIT_LIST_HEAD(&scb->list); 3774 3775 scb->state = SCB_ISSUED; 3776 if (mbox_post_cmd(adapter, scb) != 0) { 3777 3778 con_log(CL_ANN, (KERN_NOTICE 3779 "megaraid mbox: LD delete, mailbox busy\n")); 3780 3781 kioc->status = -EBUSY; 3782 3783 scb->status = -1; 3784 3785 megaraid_mbox_mm_done(adapter, scb); 3786 3787 return (-EBUSY); 3788 } 3789 3790 return 0; 3791 } 3792 3793 // put the command on the pending list and execute 3794 megaraid_mbox_runpendq(adapter, scb); 3795 3796 return 0; 3797} 3798 3799 3800static int 3801wait_till_fw_empty(adapter_t *adapter) 3802{ 3803 unsigned long flags = 0; 3804 int i; 3805 3806 3807 /* 3808 * Set the quiescent flag to stop issuing cmds to FW. 3809 */ 3810 spin_lock_irqsave(&adapter->lock, flags); 3811 adapter->quiescent++; 3812 spin_unlock_irqrestore(&adapter->lock, flags); 3813 3814 /* 3815 * Wait till there are no more cmds outstanding at FW. Try for at most 3816 * 60 seconds 3817 */ 3818 for (i = 0; i < 60 && adapter->outstanding_cmds; i++) { 3819 con_log(CL_DLEVEL1, (KERN_INFO 3820 "megaraid: FW has %d pending commands\n", 3821 adapter->outstanding_cmds)); 3822 3823 msleep(1000); 3824 } 3825 3826 return adapter->outstanding_cmds; 3827} 3828 3829 3830/** 3831 * megaraid_mbox_mm_done - callback for CMM commands 3832 * @adapter : HBA soft state 3833 * @scb : completed command 3834 * 3835 * Callback routine for internal commands originated from the management 3836 * module. 3837 */ 3838static void 3839megaraid_mbox_mm_done(adapter_t *adapter, scb_t *scb) 3840{ 3841 uioc_t *kioc; 3842 mbox64_t *mbox64; 3843 uint8_t *raw_mbox; 3844 unsigned long flags; 3845 3846 kioc = (uioc_t *)scb->gp; 3847 mbox64 = (mbox64_t *)(unsigned long)kioc->cmdbuf; 3848 mbox64->mbox32.status = scb->status; 3849 raw_mbox = (uint8_t *)&mbox64->mbox32; 3850 3851 3852 // put scb in the free pool 3853 scb->state = SCB_FREE; 3854 scb->scp = NULL; 3855 3856 spin_lock_irqsave(USER_FREE_LIST_LOCK(adapter), flags); 3857 3858 list_add(&scb->list, &adapter->uscb_pool); 3859 3860 spin_unlock_irqrestore(USER_FREE_LIST_LOCK(adapter), flags); 3861 3862 // if a delete logical drive operation succeeded, restart the 3863 // controller 3864 if (raw_mbox[0] == FC_DEL_LOGDRV && raw_mbox[2] == OP_DEL_LOGDRV) { 3865 3866 adapter->quiescent--; 3867 3868 megaraid_mbox_runpendq(adapter, NULL); 3869 } 3870 3871 kioc->done(kioc); 3872 3873 return; 3874} 3875 3876 3877/** 3878 * gather_hbainfo - HBA characteristics for the applications 3879 * @adapter : HBA soft state 3880 * @hinfo : pointer to the caller's host info strucuture 3881 */ 3882static int 3883gather_hbainfo(adapter_t *adapter, mraid_hba_info_t *hinfo) 3884{ 3885 uint8_t dmajor; 3886 3887 dmajor = megaraid_mbox_version[0]; 3888 3889 hinfo->pci_vendor_id = adapter->pdev->vendor; 3890 hinfo->pci_device_id = adapter->pdev->device; 3891 hinfo->subsys_vendor_id = adapter->pdev->subsystem_vendor; 3892 hinfo->subsys_device_id = adapter->pdev->subsystem_device; 3893 3894 hinfo->pci_bus = adapter->pdev->bus->number; 3895 hinfo->pci_dev_fn = adapter->pdev->devfn; 3896 hinfo->pci_slot = PCI_SLOT(adapter->pdev->devfn); 3897 hinfo->irq = adapter->host->irq; 3898 hinfo->baseport = ADAP2RAIDDEV(adapter)->baseport; 3899 3900 hinfo->unique_id = (hinfo->pci_bus << 8) | adapter->pdev->devfn; 3901 hinfo->host_no = adapter->host->host_no; 3902 3903 return 0; 3904} 3905 3906/* 3907 * END: Interface for the common management module 3908 */ 3909 3910 3911 3912/** 3913 * megaraid_sysfs_alloc_resources - allocate sysfs related resources 3914 * @adapter : controller's soft state 3915 * 3916 * Allocate packets required to issue FW calls whenever the sysfs attributes 3917 * are read. These attributes would require up-to-date information from the 3918 * FW. Also set up resources for mutual exclusion to share these resources and 3919 * the wait queue. 3920 * 3921 * Return 0 on success. 3922 * Return -ERROR_CODE on failure. 3923 */ 3924static int 3925megaraid_sysfs_alloc_resources(adapter_t *adapter) 3926{ 3927 mraid_device_t *raid_dev = ADAP2RAIDDEV(adapter); 3928 int rval = 0; 3929 3930 raid_dev->sysfs_uioc = kmalloc(sizeof(uioc_t), GFP_KERNEL); 3931 3932 raid_dev->sysfs_mbox64 = kmalloc(sizeof(mbox64_t), GFP_KERNEL); 3933 3934 raid_dev->sysfs_buffer = pci_alloc_consistent(adapter->pdev, 3935 PAGE_SIZE, &raid_dev->sysfs_buffer_dma); 3936 3937 if (!raid_dev->sysfs_uioc || !raid_dev->sysfs_mbox64 || 3938 !raid_dev->sysfs_buffer) { 3939 3940 con_log(CL_ANN, (KERN_WARNING 3941 "megaraid: out of memory, %s %d\n", __FUNCTION__, 3942 __LINE__)); 3943 3944 rval = -ENOMEM; 3945 3946 megaraid_sysfs_free_resources(adapter); 3947 } 3948 3949 sema_init(&raid_dev->sysfs_sem, 1); 3950 3951 init_waitqueue_head(&raid_dev->sysfs_wait_q); 3952 3953 return rval; 3954} 3955 3956 3957/** 3958 * megaraid_sysfs_free_resources - free sysfs related resources 3959 * @adapter : controller's soft state 3960 * 3961 * Free packets allocated for sysfs FW commands 3962 */ 3963static void 3964megaraid_sysfs_free_resources(adapter_t *adapter) 3965{ 3966 mraid_device_t *raid_dev = ADAP2RAIDDEV(adapter); 3967 3968 kfree(raid_dev->sysfs_uioc); 3969 kfree(raid_dev->sysfs_mbox64); 3970 3971 if (raid_dev->sysfs_buffer) { 3972 pci_free_consistent(adapter->pdev, PAGE_SIZE, 3973 raid_dev->sysfs_buffer, raid_dev->sysfs_buffer_dma); 3974 } 3975} 3976 3977 3978/** 3979 * megaraid_sysfs_get_ldmap_done - callback for get ldmap 3980 * @uioc : completed packet 3981 * 3982 * Callback routine called in the ISR/tasklet context for get ldmap call 3983 */ 3984static void 3985megaraid_sysfs_get_ldmap_done(uioc_t *uioc) 3986{ 3987 adapter_t *adapter = (adapter_t *)uioc->buf_vaddr; 3988 mraid_device_t *raid_dev = ADAP2RAIDDEV(adapter); 3989 3990 uioc->status = 0; 3991 3992 wake_up(&raid_dev->sysfs_wait_q); 3993} 3994 3995 3996/** 3997 * megaraid_sysfs_get_ldmap_timeout - timeout handling for get ldmap 3998 * @data : timed out packet 3999 * 4000 * Timeout routine to recover and return to application, in case the adapter 4001 * has stopped responding. A timeout of 60 seconds for this command seems like 4002 * a good value. 4003 */ 4004static void 4005megaraid_sysfs_get_ldmap_timeout(unsigned long data) 4006{ 4007 uioc_t *uioc = (uioc_t *)data; 4008 adapter_t *adapter = (adapter_t *)uioc->buf_vaddr; 4009 mraid_device_t *raid_dev = ADAP2RAIDDEV(adapter); 4010 4011 uioc->status = -ETIME; 4012 4013 wake_up(&raid_dev->sysfs_wait_q); 4014} 4015 4016 4017/** 4018 * megaraid_sysfs_get_ldmap - get update logical drive map 4019 * @adapter : controller's soft state 4020 * 4021 * This routine will be called whenever user reads the logical drive 4022 * attributes, go get the current logical drive mapping table from the 4023 * firmware. We use the managment API's to issue commands to the controller. 4024 * 4025 * NOTE: The commands issuance functionality is not generalized and 4026 * implemented in context of "get ld map" command only. If required, the 4027 * command issuance logical can be trivially pulled out and implemented as a 4028 * standalone libary. For now, this should suffice since there is no other 4029 * user of this interface. 4030 * 4031 * Return 0 on success. 4032 * Return -1 on failure. 4033 */ 4034static int 4035megaraid_sysfs_get_ldmap(adapter_t *adapter) 4036{ 4037 mraid_device_t *raid_dev = ADAP2RAIDDEV(adapter); 4038 uioc_t *uioc; 4039 mbox64_t *mbox64; 4040 mbox_t *mbox; 4041 char *raw_mbox; 4042 struct timer_list sysfs_timer; 4043 struct timer_list *timerp; 4044 caddr_t ldmap; 4045 int rval = 0; 4046 4047 /* 4048 * Allow only one read at a time to go through the sysfs attributes 4049 */ 4050 down(&raid_dev->sysfs_sem); 4051 4052 uioc = raid_dev->sysfs_uioc; 4053 mbox64 = raid_dev->sysfs_mbox64; 4054 ldmap = raid_dev->sysfs_buffer; 4055 4056 memset(uioc, 0, sizeof(uioc_t)); 4057 memset(mbox64, 0, sizeof(mbox64_t)); 4058 memset(ldmap, 0, sizeof(raid_dev->curr_ldmap)); 4059 4060 mbox = &mbox64->mbox32; 4061 raw_mbox = (char *)mbox; 4062 uioc->cmdbuf = (uint64_t)(unsigned long)mbox64; 4063 uioc->buf_vaddr = (caddr_t)adapter; 4064 uioc->status = -ENODATA; 4065 uioc->done = megaraid_sysfs_get_ldmap_done; 4066 4067 /* 4068 * Prepare the mailbox packet to get the current logical drive mapping 4069 * table 4070 */ 4071 mbox->xferaddr = (uint32_t)raid_dev->sysfs_buffer_dma; 4072 4073 raw_mbox[0] = FC_DEL_LOGDRV; 4074 raw_mbox[2] = OP_GET_LDID_MAP; 4075 4076 /* 4077 * Setup a timer to recover from a non-responding controller 4078 */ 4079 timerp = &sysfs_timer; 4080 init_timer(timerp); 4081 4082 timerp->function = megaraid_sysfs_get_ldmap_timeout; 4083 timerp->data = (unsigned long)uioc; 4084 timerp->expires = jiffies + 60 * HZ; 4085 4086 add_timer(timerp); 4087 4088 /* 4089 * Send the command to the firmware 4090 */ 4091 rval = megaraid_mbox_mm_command(adapter, uioc); 4092 4093 if (rval == 0) { // command successfully issued 4094 wait_event(raid_dev->sysfs_wait_q, (uioc->status != -ENODATA)); 4095 4096 /* 4097 * Check if the command timed out 4098 */ 4099 if (uioc->status == -ETIME) { 4100 con_log(CL_ANN, (KERN_NOTICE 4101 "megaraid: sysfs get ld map timed out\n")); 4102 4103 rval = -ETIME; 4104 } 4105 else { 4106 rval = mbox->status; 4107 } 4108 4109 if (rval == 0) { 4110 memcpy(raid_dev->curr_ldmap, ldmap, 4111 sizeof(raid_dev->curr_ldmap)); 4112 } 4113 else { 4114 con_log(CL_ANN, (KERN_NOTICE 4115 "megaraid: get ld map failed with %x\n", rval)); 4116 } 4117 } 4118 else { 4119 con_log(CL_ANN, (KERN_NOTICE 4120 "megaraid: could not issue ldmap command:%x\n", rval)); 4121 } 4122 4123 4124 del_timer_sync(timerp); 4125 4126 up(&raid_dev->sysfs_sem); 4127 4128 return rval; 4129} 4130 4131 4132/** 4133 * megaraid_sysfs_show_app_hndl - display application handle for this adapter 4134 * @cdev : class device object representation for the host 4135 * @buf : buffer to send data to 4136 * 4137 * Display the handle used by the applications while executing management 4138 * tasks on the adapter. We invoke a management module API to get the adapter 4139 * handle, since we do not interface with applications directly. 4140 */ 4141static ssize_t 4142megaraid_sysfs_show_app_hndl(struct class_device *cdev, char *buf) 4143{ 4144 struct Scsi_Host *shost = class_to_shost(cdev); 4145 adapter_t *adapter = (adapter_t *)SCSIHOST2ADAP(shost); 4146 uint32_t app_hndl; 4147 4148 app_hndl = mraid_mm_adapter_app_handle(adapter->unique_id); 4149 4150 return snprintf(buf, 8, "%u\n", app_hndl); 4151} 4152 4153 4154/** 4155 * megaraid_sysfs_show_ldnum - display the logical drive number for this device 4156 * @dev : device object representation for the scsi device 4157 * @attr : device attribute to show 4158 * @buf : buffer to send data to 4159 * 4160 * Display the logical drive number for the device in question, if it a valid 4161 * logical drive. For physical devices, "-1" is returned. 4162 * 4163 * The logical drive number is displayed in following format: 4164 * 4165 * <SCSI ID> <LD NUM> <LD STICKY ID> <APP ADAPTER HANDLE> 4166 * 4167 * <int> <int> <int> <int> 4168 */ 4169static ssize_t 4170megaraid_sysfs_show_ldnum(struct device *dev, struct device_attribute *attr, char *buf) 4171{ 4172 struct scsi_device *sdev = to_scsi_device(dev); 4173 adapter_t *adapter = (adapter_t *)SCSIHOST2ADAP(sdev->host); 4174 mraid_device_t *raid_dev = ADAP2RAIDDEV(adapter); 4175 int scsi_id = -1; 4176 int logical_drv = -1; 4177 int ldid_map = -1; 4178 uint32_t app_hndl = 0; 4179 int mapped_sdev_id; 4180 int rval; 4181 int i; 4182 4183 if (raid_dev->random_del_supported && 4184 MRAID_IS_LOGICAL_SDEV(adapter, sdev)) { 4185 4186 rval = megaraid_sysfs_get_ldmap(adapter); 4187 if (rval == 0) { 4188 4189 for (i = 0; i < MAX_LOGICAL_DRIVES_40LD; i++) { 4190 4191 mapped_sdev_id = sdev->id; 4192 4193 if (sdev->id > adapter->init_id) { 4194 mapped_sdev_id -= 1; 4195 } 4196 4197 if (raid_dev->curr_ldmap[i] == mapped_sdev_id) { 4198 4199 scsi_id = sdev->id; 4200 4201 logical_drv = i; 4202 4203 ldid_map = raid_dev->curr_ldmap[i]; 4204 4205 app_hndl = mraid_mm_adapter_app_handle( 4206 adapter->unique_id); 4207 4208 break; 4209 } 4210 } 4211 } 4212 else { 4213 con_log(CL_ANN, (KERN_NOTICE 4214 "megaraid: sysfs get ld map failed: %x\n", 4215 rval)); 4216 } 4217 } 4218 4219 return snprintf(buf, 36, "%d %d %d %d\n", scsi_id, logical_drv, 4220 ldid_map, app_hndl); 4221} 4222 4223 4224/* 4225 * END: Mailbox Low Level Driver 4226 */ 4227module_init(megaraid_init); 4228module_exit(megaraid_exit); 4229 4230/* vim: set ts=8 sw=8 tw=78 ai si: */ 4231