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 <linux/slab.h> 74#include "megaraid_mbox.h" 75 76static int megaraid_init(void); 77static void megaraid_exit(void); 78 79static int megaraid_probe_one(struct pci_dev*, const struct pci_device_id *); 80static void megaraid_detach_one(struct pci_dev *); 81static void megaraid_mbox_shutdown(struct pci_dev *); 82 83static int megaraid_io_attach(adapter_t *); 84static void megaraid_io_detach(adapter_t *); 85 86static int megaraid_init_mbox(adapter_t *); 87static void megaraid_fini_mbox(adapter_t *); 88 89static int megaraid_alloc_cmd_packets(adapter_t *); 90static void megaraid_free_cmd_packets(adapter_t *); 91 92static int megaraid_mbox_setup_dma_pools(adapter_t *); 93static void megaraid_mbox_teardown_dma_pools(adapter_t *); 94 95static int megaraid_sysfs_alloc_resources(adapter_t *); 96static void megaraid_sysfs_free_resources(adapter_t *); 97 98static int megaraid_abort_handler(struct scsi_cmnd *); 99static int megaraid_reset_handler(struct scsi_cmnd *); 100 101static int mbox_post_sync_cmd(adapter_t *, uint8_t []); 102static int mbox_post_sync_cmd_fast(adapter_t *, uint8_t []); 103static int megaraid_busywait_mbox(mraid_device_t *); 104static int megaraid_mbox_product_info(adapter_t *); 105static int megaraid_mbox_extended_cdb(adapter_t *); 106static int megaraid_mbox_support_ha(adapter_t *, uint16_t *); 107static int megaraid_mbox_support_random_del(adapter_t *); 108static int megaraid_mbox_get_max_sg(adapter_t *); 109static void megaraid_mbox_enum_raid_scsi(adapter_t *); 110static void megaraid_mbox_flush_cache(adapter_t *); 111static int megaraid_mbox_fire_sync_cmd(adapter_t *); 112 113static void megaraid_mbox_display_scb(adapter_t *, scb_t *); 114static void megaraid_mbox_setup_device_map(adapter_t *); 115 116static int megaraid_queue_command(struct scsi_cmnd *, 117 void (*)(struct scsi_cmnd *)); 118static scb_t *megaraid_mbox_build_cmd(adapter_t *, struct scsi_cmnd *, int *); 119static void megaraid_mbox_runpendq(adapter_t *, scb_t *); 120static void megaraid_mbox_prepare_pthru(adapter_t *, scb_t *, 121 struct scsi_cmnd *); 122static void megaraid_mbox_prepare_epthru(adapter_t *, scb_t *, 123 struct scsi_cmnd *); 124 125static irqreturn_t megaraid_isr(int, void *); 126 127static void megaraid_mbox_dpc(unsigned long); 128 129static ssize_t megaraid_sysfs_show_app_hndl(struct device *, struct device_attribute *attr, char *); 130static ssize_t megaraid_sysfs_show_ldnum(struct device *, struct device_attribute *attr, char *); 131 132static int megaraid_cmm_register(adapter_t *); 133static int megaraid_cmm_unregister(adapter_t *); 134static int megaraid_mbox_mm_handler(unsigned long, uioc_t *, uint32_t); 135static int megaraid_mbox_mm_command(adapter_t *, uioc_t *); 136static void megaraid_mbox_mm_done(adapter_t *, scb_t *); 137static int gather_hbainfo(adapter_t *, mraid_hba_info_t *); 138static int wait_till_fw_empty(adapter_t *); 139 140 141 142MODULE_AUTHOR("megaraidlinux@lsi.com"); 143MODULE_DESCRIPTION("LSI Logic MegaRAID Mailbox Driver"); 144MODULE_LICENSE("GPL"); 145MODULE_VERSION(MEGARAID_VERSION); 146 147/* 148 * ### modules parameters for driver ### 149 */ 150 151/* 152 * Set to enable driver to expose unconfigured disk to kernel 153 */ 154static int megaraid_expose_unconf_disks = 0; 155module_param_named(unconf_disks, megaraid_expose_unconf_disks, int, 0); 156MODULE_PARM_DESC(unconf_disks, 157 "Set to expose unconfigured disks to kernel (default=0)"); 158 159/* 160 * driver wait time if the adapter's mailbox is busy 161 */ 162static unsigned int max_mbox_busy_wait = MBOX_BUSY_WAIT; 163module_param_named(busy_wait, max_mbox_busy_wait, int, 0); 164MODULE_PARM_DESC(busy_wait, 165 "Max wait for mailbox in microseconds if busy (default=10)"); 166 167/* 168 * number of sectors per IO command 169 */ 170static unsigned int megaraid_max_sectors = MBOX_MAX_SECTORS; 171module_param_named(max_sectors, megaraid_max_sectors, int, 0); 172MODULE_PARM_DESC(max_sectors, 173 "Maximum number of sectors per IO command (default=128)"); 174 175/* 176 * number of commands per logical unit 177 */ 178static unsigned int megaraid_cmd_per_lun = MBOX_DEF_CMD_PER_LUN; 179module_param_named(cmd_per_lun, megaraid_cmd_per_lun, int, 0); 180MODULE_PARM_DESC(cmd_per_lun, 181 "Maximum number of commands per logical unit (default=64)"); 182 183 184/* 185 * Fast driver load option, skip scanning for physical devices during load. 186 * This would result in non-disk devices being skipped during driver load 187 * time. These can be later added though, using /proc/scsi/scsi 188 */ 189static unsigned int megaraid_fast_load = 0; 190module_param_named(fast_load, megaraid_fast_load, int, 0); 191MODULE_PARM_DESC(fast_load, 192 "Faster loading of the driver, skips physical devices! (default=0)"); 193 194 195/* 196 * mraid_debug level - threshold for amount of information to be displayed by 197 * the driver. This level can be changed through modules parameters, ioctl or 198 * sysfs/proc interface. By default, print the announcement messages only. 199 */ 200int mraid_debug_level = CL_ANN; 201module_param_named(debug_level, mraid_debug_level, int, 0); 202MODULE_PARM_DESC(debug_level, "Debug level for driver (default=0)"); 203 204/* 205 * ### global data ### 206 */ 207static uint8_t megaraid_mbox_version[8] = 208 { 0x02, 0x20, 0x04, 0x06, 3, 7, 20, 5 }; 209 210 211/* 212 * PCI table for all supported controllers. 213 */ 214static struct pci_device_id pci_id_table_g[] = { 215 { 216 PCI_VENDOR_ID_DELL, 217 PCI_DEVICE_ID_PERC4_DI_DISCOVERY, 218 PCI_VENDOR_ID_DELL, 219 PCI_SUBSYS_ID_PERC4_DI_DISCOVERY, 220 }, 221 { 222 PCI_VENDOR_ID_LSI_LOGIC, 223 PCI_DEVICE_ID_PERC4_SC, 224 PCI_VENDOR_ID_DELL, 225 PCI_SUBSYS_ID_PERC4_SC, 226 }, 227 { 228 PCI_VENDOR_ID_LSI_LOGIC, 229 PCI_DEVICE_ID_PERC4_DC, 230 PCI_VENDOR_ID_DELL, 231 PCI_SUBSYS_ID_PERC4_DC, 232 }, 233 { 234 PCI_VENDOR_ID_LSI_LOGIC, 235 PCI_DEVICE_ID_VERDE, 236 PCI_ANY_ID, 237 PCI_ANY_ID, 238 }, 239 { 240 PCI_VENDOR_ID_DELL, 241 PCI_DEVICE_ID_PERC4_DI_EVERGLADES, 242 PCI_VENDOR_ID_DELL, 243 PCI_SUBSYS_ID_PERC4_DI_EVERGLADES, 244 }, 245 { 246 PCI_VENDOR_ID_DELL, 247 PCI_DEVICE_ID_PERC4E_SI_BIGBEND, 248 PCI_VENDOR_ID_DELL, 249 PCI_SUBSYS_ID_PERC4E_SI_BIGBEND, 250 }, 251 { 252 PCI_VENDOR_ID_DELL, 253 PCI_DEVICE_ID_PERC4E_DI_KOBUK, 254 PCI_VENDOR_ID_DELL, 255 PCI_SUBSYS_ID_PERC4E_DI_KOBUK, 256 }, 257 { 258 PCI_VENDOR_ID_DELL, 259 PCI_DEVICE_ID_PERC4E_DI_CORVETTE, 260 PCI_VENDOR_ID_DELL, 261 PCI_SUBSYS_ID_PERC4E_DI_CORVETTE, 262 }, 263 { 264 PCI_VENDOR_ID_DELL, 265 PCI_DEVICE_ID_PERC4E_DI_EXPEDITION, 266 PCI_VENDOR_ID_DELL, 267 PCI_SUBSYS_ID_PERC4E_DI_EXPEDITION, 268 }, 269 { 270 PCI_VENDOR_ID_DELL, 271 PCI_DEVICE_ID_PERC4E_DI_GUADALUPE, 272 PCI_VENDOR_ID_DELL, 273 PCI_SUBSYS_ID_PERC4E_DI_GUADALUPE, 274 }, 275 { 276 PCI_VENDOR_ID_LSI_LOGIC, 277 PCI_DEVICE_ID_DOBSON, 278 PCI_ANY_ID, 279 PCI_ANY_ID, 280 }, 281 { 282 PCI_VENDOR_ID_AMI, 283 PCI_DEVICE_ID_AMI_MEGARAID3, 284 PCI_ANY_ID, 285 PCI_ANY_ID, 286 }, 287 { 288 PCI_VENDOR_ID_LSI_LOGIC, 289 PCI_DEVICE_ID_AMI_MEGARAID3, 290 PCI_ANY_ID, 291 PCI_ANY_ID, 292 }, 293 { 294 PCI_VENDOR_ID_LSI_LOGIC, 295 PCI_DEVICE_ID_LINDSAY, 296 PCI_ANY_ID, 297 PCI_ANY_ID, 298 }, 299 {0} /* Terminating entry */ 300}; 301MODULE_DEVICE_TABLE(pci, pci_id_table_g); 302 303 304static struct pci_driver megaraid_pci_driver = { 305 .name = "megaraid", 306 .id_table = pci_id_table_g, 307 .probe = megaraid_probe_one, 308 .remove = __devexit_p(megaraid_detach_one), 309 .shutdown = megaraid_mbox_shutdown, 310}; 311 312 313 314// definitions for the device attributes for exporting logical drive number 315// for a scsi address (Host, Channel, Id, Lun) 316 317DEVICE_ATTR(megaraid_mbox_app_hndl, S_IRUSR, megaraid_sysfs_show_app_hndl, 318 NULL); 319 320// Host template initializer for megaraid mbox sysfs device attributes 321static struct device_attribute *megaraid_shost_attrs[] = { 322 &dev_attr_megaraid_mbox_app_hndl, 323 NULL, 324}; 325 326 327DEVICE_ATTR(megaraid_mbox_ld, S_IRUSR, megaraid_sysfs_show_ldnum, NULL); 328 329// Host template initializer for megaraid mbox sysfs device attributes 330static struct device_attribute *megaraid_sdev_attrs[] = { 331 &dev_attr_megaraid_mbox_ld, 332 NULL, 333}; 334 335/** 336 * megaraid_change_queue_depth - Change the device's queue depth 337 * @sdev: scsi device struct 338 * @qdepth: depth to set 339 * @reason: calling context 340 * 341 * Return value: 342 * actual depth set 343 */ 344static int megaraid_change_queue_depth(struct scsi_device *sdev, int qdepth, 345 int reason) 346{ 347 if (reason != SCSI_QDEPTH_DEFAULT) 348 return -EOPNOTSUPP; 349 350 if (qdepth > MBOX_MAX_SCSI_CMDS) 351 qdepth = MBOX_MAX_SCSI_CMDS; 352 scsi_adjust_queue_depth(sdev, 0, qdepth); 353 return sdev->queue_depth; 354} 355 356/* 357 * Scsi host template for megaraid unified driver 358 */ 359static struct scsi_host_template megaraid_template_g = { 360 .module = THIS_MODULE, 361 .name = "LSI Logic MegaRAID driver", 362 .proc_name = "megaraid", 363 .queuecommand = megaraid_queue_command, 364 .eh_abort_handler = megaraid_abort_handler, 365 .eh_device_reset_handler = megaraid_reset_handler, 366 .eh_bus_reset_handler = megaraid_reset_handler, 367 .eh_host_reset_handler = megaraid_reset_handler, 368 .change_queue_depth = megaraid_change_queue_depth, 369 .use_clustering = ENABLE_CLUSTERING, 370 .sdev_attrs = megaraid_sdev_attrs, 371 .shost_attrs = megaraid_shost_attrs, 372}; 373 374 375/** 376 * megaraid_init - module load hook 377 * 378 * We register ourselves as hotplug enabled module and let PCI subsystem 379 * discover our adapters. 380 */ 381static int __init 382megaraid_init(void) 383{ 384 int rval; 385 386 // Announce the driver version 387 con_log(CL_ANN, (KERN_INFO "megaraid: %s %s\n", MEGARAID_VERSION, 388 MEGARAID_EXT_VERSION)); 389 390 // check validity of module parameters 391 if (megaraid_cmd_per_lun > MBOX_MAX_SCSI_CMDS) { 392 393 con_log(CL_ANN, (KERN_WARNING 394 "megaraid mailbox: max commands per lun reset to %d\n", 395 MBOX_MAX_SCSI_CMDS)); 396 397 megaraid_cmd_per_lun = MBOX_MAX_SCSI_CMDS; 398 } 399 400 401 // register as a PCI hot-plug driver module 402 rval = pci_register_driver(&megaraid_pci_driver); 403 if (rval < 0) { 404 con_log(CL_ANN, (KERN_WARNING 405 "megaraid: could not register hotplug support.\n")); 406 } 407 408 return rval; 409} 410 411 412/** 413 * megaraid_exit - driver unload entry point 414 * 415 * We simply unwrap the megaraid_init routine here. 416 */ 417static void __exit 418megaraid_exit(void) 419{ 420 con_log(CL_DLEVEL1, (KERN_NOTICE "megaraid: unloading framework\n")); 421 422 // unregister as PCI hotplug driver 423 pci_unregister_driver(&megaraid_pci_driver); 424 425 return; 426} 427 428 429/** 430 * megaraid_probe_one - PCI hotplug entry point 431 * @pdev : handle to this controller's PCI configuration space 432 * @id : pci device id of the class of controllers 433 * 434 * This routine should be called whenever a new adapter is detected by the 435 * PCI hotplug susbsystem. 436 */ 437static int __devinit 438megaraid_probe_one(struct pci_dev *pdev, const struct pci_device_id *id) 439{ 440 adapter_t *adapter; 441 442 443 // detected a new controller 444 con_log(CL_ANN, (KERN_INFO 445 "megaraid: probe new device %#4.04x:%#4.04x:%#4.04x:%#4.04x: ", 446 pdev->vendor, pdev->device, pdev->subsystem_vendor, 447 pdev->subsystem_device)); 448 449 con_log(CL_ANN, ("bus %d:slot %d:func %d\n", pdev->bus->number, 450 PCI_SLOT(pdev->devfn), PCI_FUNC(pdev->devfn))); 451 452 if (pci_enable_device(pdev)) { 453 con_log(CL_ANN, (KERN_WARNING 454 "megaraid: pci_enable_device failed\n")); 455 456 return -ENODEV; 457 } 458 459 // Enable bus-mastering on this controller 460 pci_set_master(pdev); 461 462 // Allocate the per driver initialization structure 463 adapter = kzalloc(sizeof(adapter_t), GFP_KERNEL); 464 465 if (adapter == NULL) { 466 con_log(CL_ANN, (KERN_WARNING 467 "megaraid: out of memory, %s %d.\n", __func__, __LINE__)); 468 469 goto out_probe_one; 470 } 471 472 473 // set up PCI related soft state and other pre-known parameters 474 adapter->unique_id = pdev->bus->number << 8 | pdev->devfn; 475 adapter->irq = pdev->irq; 476 adapter->pdev = pdev; 477 478 atomic_set(&adapter->being_detached, 0); 479 480 // Setup the default DMA mask. This would be changed later on 481 // depending on hardware capabilities 482 if (pci_set_dma_mask(adapter->pdev, DMA_BIT_MASK(32)) != 0) { 483 484 con_log(CL_ANN, (KERN_WARNING 485 "megaraid: pci_set_dma_mask failed:%d\n", __LINE__)); 486 487 goto out_free_adapter; 488 } 489 490 491 // Initialize the synchronization lock for kernel and LLD 492 spin_lock_init(&adapter->lock); 493 494 // Initialize the command queues: the list of free SCBs and the list 495 // of pending SCBs. 496 INIT_LIST_HEAD(&adapter->kscb_pool); 497 spin_lock_init(SCSI_FREE_LIST_LOCK(adapter)); 498 499 INIT_LIST_HEAD(&adapter->pend_list); 500 spin_lock_init(PENDING_LIST_LOCK(adapter)); 501 502 INIT_LIST_HEAD(&adapter->completed_list); 503 spin_lock_init(COMPLETED_LIST_LOCK(adapter)); 504 505 506 // Start the mailbox based controller 507 if (megaraid_init_mbox(adapter) != 0) { 508 con_log(CL_ANN, (KERN_WARNING 509 "megaraid: maibox adapter did not initialize\n")); 510 511 goto out_free_adapter; 512 } 513 514 // Register with LSI Common Management Module 515 if (megaraid_cmm_register(adapter) != 0) { 516 517 con_log(CL_ANN, (KERN_WARNING 518 "megaraid: could not register with management module\n")); 519 520 goto out_fini_mbox; 521 } 522 523 // setup adapter handle in PCI soft state 524 pci_set_drvdata(pdev, adapter); 525 526 // attach with scsi mid-layer 527 if (megaraid_io_attach(adapter) != 0) { 528 529 con_log(CL_ANN, (KERN_WARNING "megaraid: io attach failed\n")); 530 531 goto out_cmm_unreg; 532 } 533 534 return 0; 535 536out_cmm_unreg: 537 pci_set_drvdata(pdev, NULL); 538 megaraid_cmm_unregister(adapter); 539out_fini_mbox: 540 megaraid_fini_mbox(adapter); 541out_free_adapter: 542 kfree(adapter); 543out_probe_one: 544 pci_disable_device(pdev); 545 546 return -ENODEV; 547} 548 549 550/** 551 * megaraid_detach_one - release framework resources and call LLD release routine 552 * @pdev : handle for our PCI cofiguration space 553 * 554 * This routine is called during driver unload. We free all the allocated 555 * resources and call the corresponding LLD so that it can also release all 556 * its resources. 557 * 558 * This routine is also called from the PCI hotplug system. 559 */ 560static void 561megaraid_detach_one(struct pci_dev *pdev) 562{ 563 adapter_t *adapter; 564 struct Scsi_Host *host; 565 566 567 // Start a rollback on this adapter 568 adapter = pci_get_drvdata(pdev); 569 570 if (!adapter) { 571 con_log(CL_ANN, (KERN_CRIT 572 "megaraid: Invalid detach on %#4.04x:%#4.04x:%#4.04x:%#4.04x\n", 573 pdev->vendor, pdev->device, pdev->subsystem_vendor, 574 pdev->subsystem_device)); 575 576 return; 577 } 578 else { 579 con_log(CL_ANN, (KERN_NOTICE 580 "megaraid: detaching device %#4.04x:%#4.04x:%#4.04x:%#4.04x\n", 581 pdev->vendor, pdev->device, pdev->subsystem_vendor, 582 pdev->subsystem_device)); 583 } 584 585 586 host = adapter->host; 587 588 // do not allow any more requests from the management module for this 589 // adapter. 590 // pending with us? 591 atomic_set(&adapter->being_detached, 1); 592 593 // detach from the IO sub-system 594 megaraid_io_detach(adapter); 595 596 // reset the device state in the PCI structure. We check this 597 // condition when we enter here. If the device state is NULL, 598 // that would mean the device has already been removed 599 pci_set_drvdata(pdev, NULL); 600 601 // Unregister from common management module 602 // 603 // is a command pending with LLD or not. 604 megaraid_cmm_unregister(adapter); 605 606 // finalize the mailbox based controller and release all resources 607 megaraid_fini_mbox(adapter); 608 609 kfree(adapter); 610 611 scsi_host_put(host); 612 613 pci_disable_device(pdev); 614 615 return; 616} 617 618 619/** 620 * megaraid_mbox_shutdown - PCI shutdown for megaraid HBA 621 * @pdev : generic driver model device 622 * 623 * Shutdown notification, perform flush cache. 624 */ 625static void 626megaraid_mbox_shutdown(struct pci_dev *pdev) 627{ 628 adapter_t *adapter = pci_get_drvdata(pdev); 629 static int counter; 630 631 if (!adapter) { 632 con_log(CL_ANN, (KERN_WARNING 633 "megaraid: null device in shutdown\n")); 634 return; 635 } 636 637 // flush caches now 638 con_log(CL_ANN, (KERN_INFO "megaraid: flushing adapter %d...", 639 counter++)); 640 641 megaraid_mbox_flush_cache(adapter); 642 643 con_log(CL_ANN, ("done\n")); 644} 645 646 647/** 648 * megaraid_io_attach - attach a device with the IO subsystem 649 * @adapter : controller's soft state 650 * 651 * Attach this device with the IO subsystem. 652 */ 653static int 654megaraid_io_attach(adapter_t *adapter) 655{ 656 struct Scsi_Host *host; 657 658 // Initialize SCSI Host structure 659 host = scsi_host_alloc(&megaraid_template_g, 8); 660 if (!host) { 661 con_log(CL_ANN, (KERN_WARNING 662 "megaraid mbox: scsi_register failed\n")); 663 664 return -1; 665 } 666 667 SCSIHOST2ADAP(host) = (caddr_t)adapter; 668 adapter->host = host; 669 670 host->irq = adapter->irq; 671 host->unique_id = adapter->unique_id; 672 host->can_queue = adapter->max_cmds; 673 host->this_id = adapter->init_id; 674 host->sg_tablesize = adapter->sglen; 675 host->max_sectors = adapter->max_sectors; 676 host->cmd_per_lun = adapter->cmd_per_lun; 677 host->max_channel = adapter->max_channel; 678 host->max_id = adapter->max_target; 679 host->max_lun = adapter->max_lun; 680 681 682 // notify mid-layer about the new controller 683 if (scsi_add_host(host, &adapter->pdev->dev)) { 684 685 con_log(CL_ANN, (KERN_WARNING 686 "megaraid mbox: scsi_add_host failed\n")); 687 688 scsi_host_put(host); 689 690 return -1; 691 } 692 693 scsi_scan_host(host); 694 695 return 0; 696} 697 698 699/** 700 * megaraid_io_detach - detach a device from the IO subsystem 701 * @adapter : controller's soft state 702 * 703 * Detach this device from the IO subsystem. 704 */ 705static void 706megaraid_io_detach(adapter_t *adapter) 707{ 708 struct Scsi_Host *host; 709 710 con_log(CL_DLEVEL1, (KERN_INFO "megaraid: io detach\n")); 711 712 host = adapter->host; 713 714 scsi_remove_host(host); 715 716 return; 717} 718 719 720/* 721 * START: Mailbox Low Level Driver 722 * 723 * This is section specific to the single mailbox based controllers 724 */ 725 726/** 727 * megaraid_init_mbox - initialize controller 728 * @adapter : our soft state 729 * 730 * - Allocate 16-byte aligned mailbox memory for firmware handshake 731 * - Allocate controller's memory resources 732 * - Find out all initialization data 733 * - Allocate memory required for all the commands 734 * - Use internal library of FW routines, build up complete soft state 735 */ 736static int __devinit 737megaraid_init_mbox(adapter_t *adapter) 738{ 739 struct pci_dev *pdev; 740 mraid_device_t *raid_dev; 741 int i; 742 uint32_t magic64; 743 744 745 adapter->ito = MBOX_TIMEOUT; 746 pdev = adapter->pdev; 747 748 /* 749 * Allocate and initialize the init data structure for mailbox 750 * controllers 751 */ 752 raid_dev = kzalloc(sizeof(mraid_device_t), GFP_KERNEL); 753 if (raid_dev == NULL) return -1; 754 755 756 /* 757 * Attach the adapter soft state to raid device soft state 758 */ 759 adapter->raid_device = (caddr_t)raid_dev; 760 raid_dev->fast_load = megaraid_fast_load; 761 762 763 // our baseport 764 raid_dev->baseport = pci_resource_start(pdev, 0); 765 766 if (pci_request_regions(pdev, "MegaRAID: LSI Logic Corporation") != 0) { 767 768 con_log(CL_ANN, (KERN_WARNING 769 "megaraid: mem region busy\n")); 770 771 goto out_free_raid_dev; 772 } 773 774 raid_dev->baseaddr = ioremap_nocache(raid_dev->baseport, 128); 775 776 if (!raid_dev->baseaddr) { 777 778 con_log(CL_ANN, (KERN_WARNING 779 "megaraid: could not map hba memory\n") ); 780 781 goto out_release_regions; 782 } 783 784 /* initialize the mutual exclusion lock for the mailbox */ 785 spin_lock_init(&raid_dev->mailbox_lock); 786 787 /* allocate memory required for commands */ 788 if (megaraid_alloc_cmd_packets(adapter) != 0) 789 goto out_iounmap; 790 791 /* 792 * Issue SYNC cmd to flush the pending cmds in the adapter 793 * and initialize its internal state 794 */ 795 796 if (megaraid_mbox_fire_sync_cmd(adapter)) 797 con_log(CL_ANN, ("megaraid: sync cmd failed\n")); 798 799 /* 800 * Setup the rest of the soft state using the library of 801 * FW routines 802 */ 803 804 /* request IRQ and register the interrupt service routine */ 805 if (request_irq(adapter->irq, megaraid_isr, IRQF_SHARED, "megaraid", 806 adapter)) { 807 808 con_log(CL_ANN, (KERN_WARNING 809 "megaraid: Couldn't register IRQ %d!\n", adapter->irq)); 810 goto out_alloc_cmds; 811 812 } 813 814 // Product info 815 if (megaraid_mbox_product_info(adapter) != 0) 816 goto out_free_irq; 817 818 // Do we support extended CDBs 819 adapter->max_cdb_sz = 10; 820 if (megaraid_mbox_extended_cdb(adapter) == 0) { 821 adapter->max_cdb_sz = 16; 822 } 823 824 /* 825 * Do we support cluster environment, if we do, what is the initiator 826 * id. 827 * NOTE: In a non-cluster aware firmware environment, the LLD should 828 * return 7 as initiator id. 829 */ 830 adapter->ha = 0; 831 adapter->init_id = -1; 832 if (megaraid_mbox_support_ha(adapter, &adapter->init_id) == 0) { 833 adapter->ha = 1; 834 } 835 836 /* 837 * Prepare the device ids array to have the mapping between the kernel 838 * device address and megaraid device address. 839 * We export the physical devices on their actual addresses. The 840 * logical drives are exported on a virtual SCSI channel 841 */ 842 megaraid_mbox_setup_device_map(adapter); 843 844 // If the firmware supports random deletion, update the device id map 845 if (megaraid_mbox_support_random_del(adapter)) { 846 847 // Change the logical drives numbers in device_ids array one 848 // slot in device_ids is reserved for target id, that's why 849 // "<=" below 850 for (i = 0; i <= MAX_LOGICAL_DRIVES_40LD; i++) { 851 adapter->device_ids[adapter->max_channel][i] += 0x80; 852 } 853 adapter->device_ids[adapter->max_channel][adapter->init_id] = 854 0xFF; 855 856 raid_dev->random_del_supported = 1; 857 } 858 859 /* 860 * find out the maximum number of scatter-gather elements supported by 861 * this firmware 862 */ 863 adapter->sglen = megaraid_mbox_get_max_sg(adapter); 864 865 // enumerate RAID and SCSI channels so that all devices on SCSI 866 // channels can later be exported, including disk devices 867 megaraid_mbox_enum_raid_scsi(adapter); 868 869 /* 870 * Other parameters required by upper layer 871 * 872 * maximum number of sectors per IO command 873 */ 874 adapter->max_sectors = megaraid_max_sectors; 875 876 /* 877 * number of queued commands per LUN. 878 */ 879 adapter->cmd_per_lun = megaraid_cmd_per_lun; 880 881 /* 882 * Allocate resources required to issue FW calls, when sysfs is 883 * accessed 884 */ 885 if (megaraid_sysfs_alloc_resources(adapter) != 0) 886 goto out_free_irq; 887 888 // Set the DMA mask to 64-bit. All supported controllers as capable of 889 // DMA in this range 890 pci_read_config_dword(adapter->pdev, PCI_CONF_AMISIG64, &magic64); 891 892 if (((magic64 == HBA_SIGNATURE_64_BIT) && 893 ((adapter->pdev->subsystem_device != 894 PCI_SUBSYS_ID_MEGARAID_SATA_150_6) && 895 (adapter->pdev->subsystem_device != 896 PCI_SUBSYS_ID_MEGARAID_SATA_150_4))) || 897 (adapter->pdev->vendor == PCI_VENDOR_ID_LSI_LOGIC && 898 adapter->pdev->device == PCI_DEVICE_ID_VERDE) || 899 (adapter->pdev->vendor == PCI_VENDOR_ID_LSI_LOGIC && 900 adapter->pdev->device == PCI_DEVICE_ID_DOBSON) || 901 (adapter->pdev->vendor == PCI_VENDOR_ID_LSI_LOGIC && 902 adapter->pdev->device == PCI_DEVICE_ID_LINDSAY) || 903 (adapter->pdev->vendor == PCI_VENDOR_ID_DELL && 904 adapter->pdev->device == PCI_DEVICE_ID_PERC4_DI_EVERGLADES) || 905 (adapter->pdev->vendor == PCI_VENDOR_ID_DELL && 906 adapter->pdev->device == PCI_DEVICE_ID_PERC4E_DI_KOBUK)) { 907 if (pci_set_dma_mask(adapter->pdev, DMA_BIT_MASK(64))) { 908 con_log(CL_ANN, (KERN_WARNING 909 "megaraid: DMA mask for 64-bit failed\n")); 910 911 if (pci_set_dma_mask (adapter->pdev, DMA_BIT_MASK(32))) { 912 con_log(CL_ANN, (KERN_WARNING 913 "megaraid: 32-bit DMA mask failed\n")); 914 goto out_free_sysfs_res; 915 } 916 } 917 } 918 919 // setup tasklet for DPC 920 tasklet_init(&adapter->dpc_h, megaraid_mbox_dpc, 921 (unsigned long)adapter); 922 923 con_log(CL_DLEVEL1, (KERN_INFO 924 "megaraid mbox hba successfully initialized\n")); 925 926 return 0; 927 928out_free_sysfs_res: 929 megaraid_sysfs_free_resources(adapter); 930out_free_irq: 931 free_irq(adapter->irq, adapter); 932out_alloc_cmds: 933 megaraid_free_cmd_packets(adapter); 934out_iounmap: 935 iounmap(raid_dev->baseaddr); 936out_release_regions: 937 pci_release_regions(pdev); 938out_free_raid_dev: 939 kfree(raid_dev); 940 941 return -1; 942} 943 944 945/** 946 * megaraid_fini_mbox - undo controller initialization 947 * @adapter : our soft state 948 */ 949static void 950megaraid_fini_mbox(adapter_t *adapter) 951{ 952 mraid_device_t *raid_dev = ADAP2RAIDDEV(adapter); 953 954 // flush all caches 955 megaraid_mbox_flush_cache(adapter); 956 957 tasklet_kill(&adapter->dpc_h); 958 959 megaraid_sysfs_free_resources(adapter); 960 961 megaraid_free_cmd_packets(adapter); 962 963 free_irq(adapter->irq, adapter); 964 965 iounmap(raid_dev->baseaddr); 966 967 pci_release_regions(adapter->pdev); 968 969 kfree(raid_dev); 970 971 return; 972} 973 974 975/** 976 * megaraid_alloc_cmd_packets - allocate shared mailbox 977 * @adapter : soft state of the raid controller 978 * 979 * Allocate and align the shared mailbox. This maibox is used to issue 980 * all the commands. For IO based controllers, the mailbox is also regsitered 981 * with the FW. Allocate memory for all commands as well. 982 * This is our big allocator. 983 */ 984static int 985megaraid_alloc_cmd_packets(adapter_t *adapter) 986{ 987 mraid_device_t *raid_dev = ADAP2RAIDDEV(adapter); 988 struct pci_dev *pdev; 989 unsigned long align; 990 scb_t *scb; 991 mbox_ccb_t *ccb; 992 struct mraid_pci_blk *epthru_pci_blk; 993 struct mraid_pci_blk *sg_pci_blk; 994 struct mraid_pci_blk *mbox_pci_blk; 995 int i; 996 997 pdev = adapter->pdev; 998 999 /* 1000 * Setup the mailbox 1001 * Allocate the common 16-byte aligned memory for the handshake 1002 * mailbox. 1003 */ 1004 raid_dev->una_mbox64 = pci_alloc_consistent(adapter->pdev, 1005 sizeof(mbox64_t), &raid_dev->una_mbox64_dma); 1006 1007 if (!raid_dev->una_mbox64) { 1008 con_log(CL_ANN, (KERN_WARNING 1009 "megaraid: out of memory, %s %d\n", __func__, 1010 __LINE__)); 1011 return -1; 1012 } 1013 memset(raid_dev->una_mbox64, 0, sizeof(mbox64_t)); 1014 1015 /* 1016 * Align the mailbox at 16-byte boundary 1017 */ 1018 raid_dev->mbox = &raid_dev->una_mbox64->mbox32; 1019 1020 raid_dev->mbox = (mbox_t *)((((unsigned long)raid_dev->mbox) + 15) & 1021 (~0UL ^ 0xFUL)); 1022 1023 raid_dev->mbox64 = (mbox64_t *)(((unsigned long)raid_dev->mbox) - 8); 1024 1025 align = ((void *)raid_dev->mbox - 1026 ((void *)&raid_dev->una_mbox64->mbox32)); 1027 1028 raid_dev->mbox_dma = (unsigned long)raid_dev->una_mbox64_dma + 8 + 1029 align; 1030 1031 // Allocate memory for commands issued internally 1032 adapter->ibuf = pci_alloc_consistent(pdev, MBOX_IBUF_SIZE, 1033 &adapter->ibuf_dma_h); 1034 if (!adapter->ibuf) { 1035 1036 con_log(CL_ANN, (KERN_WARNING 1037 "megaraid: out of memory, %s %d\n", __func__, 1038 __LINE__)); 1039 1040 goto out_free_common_mbox; 1041 } 1042 memset(adapter->ibuf, 0, MBOX_IBUF_SIZE); 1043 1044 // Allocate memory for our SCSI Command Blocks and their associated 1045 // memory 1046 1047 /* 1048 * Allocate memory for the base list of scb. Later allocate memory for 1049 * CCBs and embedded components of each CCB and point the pointers in 1050 * scb to the allocated components 1051 * NOTE: The code to allocate SCB will be duplicated in all the LLD 1052 * since the calling routine does not yet know the number of available 1053 * commands. 1054 */ 1055 adapter->kscb_list = kcalloc(MBOX_MAX_SCSI_CMDS, sizeof(scb_t), GFP_KERNEL); 1056 1057 if (adapter->kscb_list == NULL) { 1058 con_log(CL_ANN, (KERN_WARNING 1059 "megaraid: out of memory, %s %d\n", __func__, 1060 __LINE__)); 1061 goto out_free_ibuf; 1062 } 1063 1064 // memory allocation for our command packets 1065 if (megaraid_mbox_setup_dma_pools(adapter) != 0) { 1066 con_log(CL_ANN, (KERN_WARNING 1067 "megaraid: out of memory, %s %d\n", __func__, 1068 __LINE__)); 1069 goto out_free_scb_list; 1070 } 1071 1072 // Adjust the scb pointers and link in the free pool 1073 epthru_pci_blk = raid_dev->epthru_pool; 1074 sg_pci_blk = raid_dev->sg_pool; 1075 mbox_pci_blk = raid_dev->mbox_pool; 1076 1077 for (i = 0; i < MBOX_MAX_SCSI_CMDS; i++) { 1078 scb = adapter->kscb_list + i; 1079 ccb = raid_dev->ccb_list + i; 1080 1081 ccb->mbox = (mbox_t *)(mbox_pci_blk[i].vaddr + 16); 1082 ccb->raw_mbox = (uint8_t *)ccb->mbox; 1083 ccb->mbox64 = (mbox64_t *)(mbox_pci_blk[i].vaddr + 8); 1084 ccb->mbox_dma_h = (unsigned long)mbox_pci_blk[i].dma_addr + 16; 1085 1086 // make sure the mailbox is aligned properly 1087 if (ccb->mbox_dma_h & 0x0F) { 1088 con_log(CL_ANN, (KERN_CRIT 1089 "megaraid mbox: not aligned on 16-bytes\n")); 1090 1091 goto out_teardown_dma_pools; 1092 } 1093 1094 ccb->epthru = (mraid_epassthru_t *) 1095 epthru_pci_blk[i].vaddr; 1096 ccb->epthru_dma_h = epthru_pci_blk[i].dma_addr; 1097 ccb->pthru = (mraid_passthru_t *)ccb->epthru; 1098 ccb->pthru_dma_h = ccb->epthru_dma_h; 1099 1100 1101 ccb->sgl64 = (mbox_sgl64 *)sg_pci_blk[i].vaddr; 1102 ccb->sgl_dma_h = sg_pci_blk[i].dma_addr; 1103 ccb->sgl32 = (mbox_sgl32 *)ccb->sgl64; 1104 1105 scb->ccb = (caddr_t)ccb; 1106 scb->gp = 0; 1107 1108 scb->sno = i; // command index 1109 1110 scb->scp = NULL; 1111 scb->state = SCB_FREE; 1112 scb->dma_direction = PCI_DMA_NONE; 1113 scb->dma_type = MRAID_DMA_NONE; 1114 scb->dev_channel = -1; 1115 scb->dev_target = -1; 1116 1117 // put scb in the free pool 1118 list_add_tail(&scb->list, &adapter->kscb_pool); 1119 } 1120 1121 return 0; 1122 1123out_teardown_dma_pools: 1124 megaraid_mbox_teardown_dma_pools(adapter); 1125out_free_scb_list: 1126 kfree(adapter->kscb_list); 1127out_free_ibuf: 1128 pci_free_consistent(pdev, MBOX_IBUF_SIZE, (void *)adapter->ibuf, 1129 adapter->ibuf_dma_h); 1130out_free_common_mbox: 1131 pci_free_consistent(adapter->pdev, sizeof(mbox64_t), 1132 (caddr_t)raid_dev->una_mbox64, raid_dev->una_mbox64_dma); 1133 1134 return -1; 1135} 1136 1137 1138/** 1139 * megaraid_free_cmd_packets - free memory 1140 * @adapter : soft state of the raid controller 1141 * 1142 * Release memory resources allocated for commands. 1143 */ 1144static void 1145megaraid_free_cmd_packets(adapter_t *adapter) 1146{ 1147 mraid_device_t *raid_dev = ADAP2RAIDDEV(adapter); 1148 1149 megaraid_mbox_teardown_dma_pools(adapter); 1150 1151 kfree(adapter->kscb_list); 1152 1153 pci_free_consistent(adapter->pdev, MBOX_IBUF_SIZE, 1154 (void *)adapter->ibuf, adapter->ibuf_dma_h); 1155 1156 pci_free_consistent(adapter->pdev, sizeof(mbox64_t), 1157 (caddr_t)raid_dev->una_mbox64, raid_dev->una_mbox64_dma); 1158 return; 1159} 1160 1161 1162/** 1163 * megaraid_mbox_setup_dma_pools - setup dma pool for command packets 1164 * @adapter : HBA soft state 1165 * 1166 * Setup the dma pools for mailbox, passthru and extended passthru structures, 1167 * and scatter-gather lists. 1168 */ 1169static int 1170megaraid_mbox_setup_dma_pools(adapter_t *adapter) 1171{ 1172 mraid_device_t *raid_dev = ADAP2RAIDDEV(adapter); 1173 struct mraid_pci_blk *epthru_pci_blk; 1174 struct mraid_pci_blk *sg_pci_blk; 1175 struct mraid_pci_blk *mbox_pci_blk; 1176 int i; 1177 1178 1179 1180 // Allocate memory for 16-bytes aligned mailboxes 1181 raid_dev->mbox_pool_handle = pci_pool_create("megaraid mbox pool", 1182 adapter->pdev, 1183 sizeof(mbox64_t) + 16, 1184 16, 0); 1185 1186 if (raid_dev->mbox_pool_handle == NULL) { 1187 goto fail_setup_dma_pool; 1188 } 1189 1190 mbox_pci_blk = raid_dev->mbox_pool; 1191 for (i = 0; i < MBOX_MAX_SCSI_CMDS; i++) { 1192 mbox_pci_blk[i].vaddr = pci_pool_alloc( 1193 raid_dev->mbox_pool_handle, 1194 GFP_KERNEL, 1195 &mbox_pci_blk[i].dma_addr); 1196 if (!mbox_pci_blk[i].vaddr) { 1197 goto fail_setup_dma_pool; 1198 } 1199 } 1200 1201 /* 1202 * Allocate memory for each embedded passthru strucuture pointer 1203 * Request for a 128 bytes aligned structure for each passthru command 1204 * structure 1205 * Since passthru and extended passthru commands are exclusive, they 1206 * share common memory pool. Passthru structures piggyback on memory 1207 * allocted to extended passthru since passthru is smaller of the two 1208 */ 1209 raid_dev->epthru_pool_handle = pci_pool_create("megaraid mbox pthru", 1210 adapter->pdev, sizeof(mraid_epassthru_t), 128, 0); 1211 1212 if (raid_dev->epthru_pool_handle == NULL) { 1213 goto fail_setup_dma_pool; 1214 } 1215 1216 epthru_pci_blk = raid_dev->epthru_pool; 1217 for (i = 0; i < MBOX_MAX_SCSI_CMDS; i++) { 1218 epthru_pci_blk[i].vaddr = pci_pool_alloc( 1219 raid_dev->epthru_pool_handle, 1220 GFP_KERNEL, 1221 &epthru_pci_blk[i].dma_addr); 1222 if (!epthru_pci_blk[i].vaddr) { 1223 goto fail_setup_dma_pool; 1224 } 1225 } 1226 1227 1228 // Allocate memory for each scatter-gather list. Request for 512 bytes 1229 // alignment for each sg list 1230 raid_dev->sg_pool_handle = pci_pool_create("megaraid mbox sg", 1231 adapter->pdev, 1232 sizeof(mbox_sgl64) * MBOX_MAX_SG_SIZE, 1233 512, 0); 1234 1235 if (raid_dev->sg_pool_handle == NULL) { 1236 goto fail_setup_dma_pool; 1237 } 1238 1239 sg_pci_blk = raid_dev->sg_pool; 1240 for (i = 0; i < MBOX_MAX_SCSI_CMDS; i++) { 1241 sg_pci_blk[i].vaddr = pci_pool_alloc( 1242 raid_dev->sg_pool_handle, 1243 GFP_KERNEL, 1244 &sg_pci_blk[i].dma_addr); 1245 if (!sg_pci_blk[i].vaddr) { 1246 goto fail_setup_dma_pool; 1247 } 1248 } 1249 1250 return 0; 1251 1252fail_setup_dma_pool: 1253 megaraid_mbox_teardown_dma_pools(adapter); 1254 return -1; 1255} 1256 1257 1258/** 1259 * megaraid_mbox_teardown_dma_pools - teardown dma pools for command packets 1260 * @adapter : HBA soft state 1261 * 1262 * Teardown the dma pool for mailbox, passthru and extended passthru 1263 * structures, and scatter-gather lists. 1264 */ 1265static void 1266megaraid_mbox_teardown_dma_pools(adapter_t *adapter) 1267{ 1268 mraid_device_t *raid_dev = ADAP2RAIDDEV(adapter); 1269 struct mraid_pci_blk *epthru_pci_blk; 1270 struct mraid_pci_blk *sg_pci_blk; 1271 struct mraid_pci_blk *mbox_pci_blk; 1272 int i; 1273 1274 1275 sg_pci_blk = raid_dev->sg_pool; 1276 for (i = 0; i < MBOX_MAX_SCSI_CMDS && sg_pci_blk[i].vaddr; i++) { 1277 pci_pool_free(raid_dev->sg_pool_handle, sg_pci_blk[i].vaddr, 1278 sg_pci_blk[i].dma_addr); 1279 } 1280 if (raid_dev->sg_pool_handle) 1281 pci_pool_destroy(raid_dev->sg_pool_handle); 1282 1283 1284 epthru_pci_blk = raid_dev->epthru_pool; 1285 for (i = 0; i < MBOX_MAX_SCSI_CMDS && epthru_pci_blk[i].vaddr; i++) { 1286 pci_pool_free(raid_dev->epthru_pool_handle, 1287 epthru_pci_blk[i].vaddr, epthru_pci_blk[i].dma_addr); 1288 } 1289 if (raid_dev->epthru_pool_handle) 1290 pci_pool_destroy(raid_dev->epthru_pool_handle); 1291 1292 1293 mbox_pci_blk = raid_dev->mbox_pool; 1294 for (i = 0; i < MBOX_MAX_SCSI_CMDS && mbox_pci_blk[i].vaddr; i++) { 1295 pci_pool_free(raid_dev->mbox_pool_handle, 1296 mbox_pci_blk[i].vaddr, mbox_pci_blk[i].dma_addr); 1297 } 1298 if (raid_dev->mbox_pool_handle) 1299 pci_pool_destroy(raid_dev->mbox_pool_handle); 1300 1301 return; 1302} 1303 1304 1305/** 1306 * megaraid_alloc_scb - detach and return a scb from the free list 1307 * @adapter : controller's soft state 1308 * @scp : pointer to the scsi command to be executed 1309 * 1310 * Return the scb from the head of the free list. %NULL if there are none 1311 * available. 1312 */ 1313static scb_t * 1314megaraid_alloc_scb(adapter_t *adapter, struct scsi_cmnd *scp) 1315{ 1316 struct list_head *head = &adapter->kscb_pool; 1317 scb_t *scb = NULL; 1318 unsigned long flags; 1319 1320 // detach scb from free pool 1321 spin_lock_irqsave(SCSI_FREE_LIST_LOCK(adapter), flags); 1322 1323 if (list_empty(head)) { 1324 spin_unlock_irqrestore(SCSI_FREE_LIST_LOCK(adapter), flags); 1325 return NULL; 1326 } 1327 1328 scb = list_entry(head->next, scb_t, list); 1329 list_del_init(&scb->list); 1330 1331 spin_unlock_irqrestore(SCSI_FREE_LIST_LOCK(adapter), flags); 1332 1333 scb->state = SCB_ACTIVE; 1334 scb->scp = scp; 1335 scb->dma_type = MRAID_DMA_NONE; 1336 1337 return scb; 1338} 1339 1340 1341/** 1342 * megaraid_dealloc_scb - return the scb to the free pool 1343 * @adapter : controller's soft state 1344 * @scb : scb to be freed 1345 * 1346 * Return the scb back to the free list of scbs. The caller must 'flush' the 1347 * SCB before calling us. E.g., performing pci_unamp and/or pci_sync etc. 1348 * NOTE NOTE: Make sure the scb is not on any list before calling this 1349 * routine. 1350 */ 1351static inline void 1352megaraid_dealloc_scb(adapter_t *adapter, scb_t *scb) 1353{ 1354 unsigned long flags; 1355 1356 // put scb in the free pool 1357 scb->state = SCB_FREE; 1358 scb->scp = NULL; 1359 spin_lock_irqsave(SCSI_FREE_LIST_LOCK(adapter), flags); 1360 1361 list_add(&scb->list, &adapter->kscb_pool); 1362 1363 spin_unlock_irqrestore(SCSI_FREE_LIST_LOCK(adapter), flags); 1364 1365 return; 1366} 1367 1368 1369/** 1370 * megaraid_mbox_mksgl - make the scatter-gather list 1371 * @adapter : controller's soft state 1372 * @scb : scsi control block 1373 * 1374 * Prepare the scatter-gather list. 1375 */ 1376static int 1377megaraid_mbox_mksgl(adapter_t *adapter, scb_t *scb) 1378{ 1379 struct scatterlist *sgl; 1380 mbox_ccb_t *ccb; 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 sgcnt = scsi_dma_map(scp); 1390 BUG_ON(sgcnt < 0 || sgcnt > adapter->sglen); 1391 1392 // no mapping required if no data to be transferred 1393 if (!sgcnt) 1394 return 0; 1395 1396 scb->dma_type = MRAID_DMA_WSG; 1397 1398 scsi_for_each_sg(scp, sgl, sgcnt, i) { 1399 ccb->sgl64[i].address = sg_dma_address(sgl); 1400 ccb->sgl64[i].length = sg_dma_len(sgl); 1401 } 1402 1403 // Return count of SG nodes 1404 return sgcnt; 1405} 1406 1407 1408/** 1409 * mbox_post_cmd - issue a mailbox command 1410 * @adapter : controller's soft state 1411 * @scb : command to be issued 1412 * 1413 * Post the command to the controller if mailbox is available. 1414 */ 1415static int 1416mbox_post_cmd(adapter_t *adapter, scb_t *scb) 1417{ 1418 mraid_device_t *raid_dev = ADAP2RAIDDEV(adapter); 1419 mbox64_t *mbox64; 1420 mbox_t *mbox; 1421 mbox_ccb_t *ccb; 1422 unsigned long flags; 1423 unsigned int i = 0; 1424 1425 1426 ccb = (mbox_ccb_t *)scb->ccb; 1427 mbox = raid_dev->mbox; 1428 mbox64 = raid_dev->mbox64; 1429 1430 /* 1431 * Check for busy mailbox. If it is, return failure - the caller 1432 * should retry later. 1433 */ 1434 spin_lock_irqsave(MAILBOX_LOCK(raid_dev), flags); 1435 1436 if (unlikely(mbox->busy)) { 1437 do { 1438 udelay(1); 1439 i++; 1440 rmb(); 1441 } while(mbox->busy && (i < max_mbox_busy_wait)); 1442 1443 if (mbox->busy) { 1444 1445 spin_unlock_irqrestore(MAILBOX_LOCK(raid_dev), flags); 1446 1447 return -1; 1448 } 1449 } 1450 1451 1452 // Copy this command's mailbox data into "adapter's" mailbox 1453 memcpy((caddr_t)mbox64, (caddr_t)ccb->mbox64, 22); 1454 mbox->cmdid = scb->sno; 1455 1456 adapter->outstanding_cmds++; 1457 1458 if (scb->dma_direction == PCI_DMA_TODEVICE) 1459 pci_dma_sync_sg_for_device(adapter->pdev, 1460 scsi_sglist(scb->scp), 1461 scsi_sg_count(scb->scp), 1462 PCI_DMA_TODEVICE); 1463 1464 mbox->busy = 1; // Set busy 1465 mbox->poll = 0; 1466 mbox->ack = 0; 1467 wmb(); 1468 1469 WRINDOOR(raid_dev, raid_dev->mbox_dma | 0x1); 1470 1471 spin_unlock_irqrestore(MAILBOX_LOCK(raid_dev), flags); 1472 1473 return 0; 1474} 1475 1476 1477/** 1478 * megaraid_queue_command - generic queue entry point for all LLDs 1479 * @scp : pointer to the scsi command to be executed 1480 * @done : callback routine to be called after the cmd has be completed 1481 * 1482 * Queue entry point for mailbox based controllers. 1483 */ 1484static int 1485megaraid_queue_command(struct scsi_cmnd *scp, void (*done)(struct scsi_cmnd *)) 1486{ 1487 adapter_t *adapter; 1488 scb_t *scb; 1489 int if_busy; 1490 1491 adapter = SCP2ADAPTER(scp); 1492 scp->scsi_done = done; 1493 scp->result = 0; 1494 1495 /* 1496 * Allocate and build a SCB request 1497 * if_busy flag will be set if megaraid_mbox_build_cmd() command could 1498 * not allocate scb. We will return non-zero status in that case. 1499 * NOTE: scb can be null even though certain commands completed 1500 * successfully, e.g., MODE_SENSE and TEST_UNIT_READY, it would 1501 * return 0 in that case, and we would do the callback right away. 1502 */ 1503 if_busy = 0; 1504 scb = megaraid_mbox_build_cmd(adapter, scp, &if_busy); 1505 if (!scb) { // command already completed 1506 done(scp); 1507 return 0; 1508 } 1509 1510 megaraid_mbox_runpendq(adapter, scb); 1511 return if_busy; 1512} 1513 1514/** 1515 * megaraid_mbox_build_cmd - transform the mid-layer scsi commands 1516 * @adapter : controller's soft state 1517 * @scp : mid-layer scsi command pointer 1518 * @busy : set if request could not be completed because of lack of 1519 * resources 1520 * 1521 * Transform the mid-layer scsi command to megaraid firmware lingua. 1522 * Convert the command issued by mid-layer to format understood by megaraid 1523 * firmware. We also complete certain commands without sending them to firmware. 1524 */ 1525static scb_t * 1526megaraid_mbox_build_cmd(adapter_t *adapter, struct scsi_cmnd *scp, int *busy) 1527{ 1528 mraid_device_t *rdev = ADAP2RAIDDEV(adapter); 1529 int channel; 1530 int target; 1531 int islogical; 1532 mbox_ccb_t *ccb; 1533 mraid_passthru_t *pthru; 1534 mbox64_t *mbox64; 1535 mbox_t *mbox; 1536 scb_t *scb; 1537 char skip[] = "skipping"; 1538 char scan[] = "scanning"; 1539 char *ss; 1540 1541 1542 /* 1543 * Get the appropriate device map for the device this command is 1544 * intended for 1545 */ 1546 MRAID_GET_DEVICE_MAP(adapter, scp, channel, target, islogical); 1547 1548 /* 1549 * Logical drive commands 1550 */ 1551 if (islogical) { 1552 switch (scp->cmnd[0]) { 1553 case TEST_UNIT_READY: 1554 /* 1555 * Do we support clustering and is the support enabled 1556 * If no, return success always 1557 */ 1558 if (!adapter->ha) { 1559 scp->result = (DID_OK << 16); 1560 return NULL; 1561 } 1562 1563 if (!(scb = megaraid_alloc_scb(adapter, scp))) { 1564 scp->result = (DID_ERROR << 16); 1565 *busy = 1; 1566 return NULL; 1567 } 1568 1569 scb->dma_direction = scp->sc_data_direction; 1570 scb->dev_channel = 0xFF; 1571 scb->dev_target = target; 1572 ccb = (mbox_ccb_t *)scb->ccb; 1573 1574 /* 1575 * The command id will be provided by the command 1576 * issuance routine 1577 */ 1578 ccb->raw_mbox[0] = CLUSTER_CMD; 1579 ccb->raw_mbox[2] = RESERVATION_STATUS; 1580 ccb->raw_mbox[3] = target; 1581 1582 return scb; 1583 1584 case MODE_SENSE: 1585 { 1586 struct scatterlist *sgl; 1587 caddr_t vaddr; 1588 1589 sgl = scsi_sglist(scp); 1590 if (sg_page(sgl)) { 1591 vaddr = (caddr_t) sg_virt(&sgl[0]); 1592 1593 memset(vaddr, 0, scp->cmnd[4]); 1594 } 1595 else { 1596 con_log(CL_ANN, (KERN_WARNING 1597 "megaraid mailbox: invalid sg:%d\n", 1598 __LINE__)); 1599 } 1600 } 1601 scp->result = (DID_OK << 16); 1602 return NULL; 1603 1604 case INQUIRY: 1605 /* 1606 * Display the channel scan for logical drives 1607 * Do not display scan for a channel if already done. 1608 */ 1609 if (!(rdev->last_disp & (1L << SCP2CHANNEL(scp)))) { 1610 1611 con_log(CL_ANN, (KERN_INFO 1612 "scsi[%d]: scanning scsi channel %d", 1613 adapter->host->host_no, 1614 SCP2CHANNEL(scp))); 1615 1616 con_log(CL_ANN, ( 1617 " [virtual] for logical drives\n")); 1618 1619 rdev->last_disp |= (1L << SCP2CHANNEL(scp)); 1620 } 1621 1622 if (scp->cmnd[1] & MEGA_SCSI_INQ_EVPD) { 1623 scp->sense_buffer[0] = 0x70; 1624 scp->sense_buffer[2] = ILLEGAL_REQUEST; 1625 scp->sense_buffer[12] = MEGA_INVALID_FIELD_IN_CDB; 1626 scp->result = CHECK_CONDITION << 1; 1627 return NULL; 1628 } 1629 1630 /* Fall through */ 1631 1632 case READ_CAPACITY: 1633 /* 1634 * Do not allow LUN > 0 for logical drives and 1635 * requests for more than 40 logical drives 1636 */ 1637 if (SCP2LUN(scp)) { 1638 scp->result = (DID_BAD_TARGET << 16); 1639 return NULL; 1640 } 1641 if ((target % 0x80) >= MAX_LOGICAL_DRIVES_40LD) { 1642 scp->result = (DID_BAD_TARGET << 16); 1643 return NULL; 1644 } 1645 1646 1647 /* Allocate a SCB and initialize passthru */ 1648 if (!(scb = megaraid_alloc_scb(adapter, scp))) { 1649 scp->result = (DID_ERROR << 16); 1650 *busy = 1; 1651 return NULL; 1652 } 1653 1654 ccb = (mbox_ccb_t *)scb->ccb; 1655 scb->dev_channel = 0xFF; 1656 scb->dev_target = target; 1657 pthru = ccb->pthru; 1658 mbox = ccb->mbox; 1659 mbox64 = ccb->mbox64; 1660 1661 pthru->timeout = 0; 1662 pthru->ars = 1; 1663 pthru->reqsenselen = 14; 1664 pthru->islogical = 1; 1665 pthru->logdrv = target; 1666 pthru->cdblen = scp->cmd_len; 1667 memcpy(pthru->cdb, scp->cmnd, scp->cmd_len); 1668 1669 mbox->cmd = MBOXCMD_PASSTHRU64; 1670 scb->dma_direction = scp->sc_data_direction; 1671 1672 pthru->dataxferlen = scsi_bufflen(scp); 1673 pthru->dataxferaddr = ccb->sgl_dma_h; 1674 pthru->numsge = megaraid_mbox_mksgl(adapter, 1675 scb); 1676 1677 mbox->xferaddr = 0xFFFFFFFF; 1678 mbox64->xferaddr_lo = (uint32_t )ccb->pthru_dma_h; 1679 mbox64->xferaddr_hi = 0; 1680 1681 return scb; 1682 1683 case READ_6: 1684 case WRITE_6: 1685 case READ_10: 1686 case WRITE_10: 1687 case READ_12: 1688 case WRITE_12: 1689 1690 /* 1691 * Allocate a SCB and initialize mailbox 1692 */ 1693 if (!(scb = megaraid_alloc_scb(adapter, scp))) { 1694 scp->result = (DID_ERROR << 16); 1695 *busy = 1; 1696 return NULL; 1697 } 1698 ccb = (mbox_ccb_t *)scb->ccb; 1699 scb->dev_channel = 0xFF; 1700 scb->dev_target = target; 1701 mbox = ccb->mbox; 1702 mbox64 = ccb->mbox64; 1703 mbox->logdrv = target; 1704 1705 /* 1706 * A little HACK: 2nd bit is zero for all scsi read 1707 * commands and is set for all scsi write commands 1708 */ 1709 mbox->cmd = (scp->cmnd[0] & 0x02) ? MBOXCMD_LWRITE64: 1710 MBOXCMD_LREAD64 ; 1711 1712 /* 1713 * 6-byte READ(0x08) or WRITE(0x0A) cdb 1714 */ 1715 if (scp->cmd_len == 6) { 1716 mbox->numsectors = (uint32_t)scp->cmnd[4]; 1717 mbox->lba = 1718 ((uint32_t)scp->cmnd[1] << 16) | 1719 ((uint32_t)scp->cmnd[2] << 8) | 1720 (uint32_t)scp->cmnd[3]; 1721 1722 mbox->lba &= 0x1FFFFF; 1723 } 1724 1725 /* 1726 * 10-byte READ(0x28) or WRITE(0x2A) cdb 1727 */ 1728 else if (scp->cmd_len == 10) { 1729 mbox->numsectors = 1730 (uint32_t)scp->cmnd[8] | 1731 ((uint32_t)scp->cmnd[7] << 8); 1732 mbox->lba = 1733 ((uint32_t)scp->cmnd[2] << 24) | 1734 ((uint32_t)scp->cmnd[3] << 16) | 1735 ((uint32_t)scp->cmnd[4] << 8) | 1736 (uint32_t)scp->cmnd[5]; 1737 } 1738 1739 /* 1740 * 12-byte READ(0xA8) or WRITE(0xAA) cdb 1741 */ 1742 else if (scp->cmd_len == 12) { 1743 mbox->lba = 1744 ((uint32_t)scp->cmnd[2] << 24) | 1745 ((uint32_t)scp->cmnd[3] << 16) | 1746 ((uint32_t)scp->cmnd[4] << 8) | 1747 (uint32_t)scp->cmnd[5]; 1748 1749 mbox->numsectors = 1750 ((uint32_t)scp->cmnd[6] << 24) | 1751 ((uint32_t)scp->cmnd[7] << 16) | 1752 ((uint32_t)scp->cmnd[8] << 8) | 1753 (uint32_t)scp->cmnd[9]; 1754 } 1755 else { 1756 con_log(CL_ANN, (KERN_WARNING 1757 "megaraid: unsupported CDB length\n")); 1758 1759 megaraid_dealloc_scb(adapter, scb); 1760 1761 scp->result = (DID_ERROR << 16); 1762 return NULL; 1763 } 1764 1765 scb->dma_direction = scp->sc_data_direction; 1766 1767 // Calculate Scatter-Gather info 1768 mbox64->xferaddr_lo = (uint32_t )ccb->sgl_dma_h; 1769 mbox->numsge = megaraid_mbox_mksgl(adapter, 1770 scb); 1771 mbox->xferaddr = 0xFFFFFFFF; 1772 mbox64->xferaddr_hi = 0; 1773 1774 return scb; 1775 1776 case RESERVE: 1777 case RELEASE: 1778 /* 1779 * Do we support clustering and is the support enabled 1780 */ 1781 if (!adapter->ha) { 1782 scp->result = (DID_BAD_TARGET << 16); 1783 return NULL; 1784 } 1785 1786 /* 1787 * Allocate a SCB and initialize mailbox 1788 */ 1789 if (!(scb = megaraid_alloc_scb(adapter, scp))) { 1790 scp->result = (DID_ERROR << 16); 1791 *busy = 1; 1792 return NULL; 1793 } 1794 1795 ccb = (mbox_ccb_t *)scb->ccb; 1796 scb->dev_channel = 0xFF; 1797 scb->dev_target = target; 1798 ccb->raw_mbox[0] = CLUSTER_CMD; 1799 ccb->raw_mbox[2] = (scp->cmnd[0] == RESERVE) ? 1800 RESERVE_LD : RELEASE_LD; 1801 1802 ccb->raw_mbox[3] = target; 1803 scb->dma_direction = scp->sc_data_direction; 1804 1805 return scb; 1806 1807 default: 1808 scp->result = (DID_BAD_TARGET << 16); 1809 return NULL; 1810 } 1811 } 1812 else { // Passthru device commands 1813 1814 // Do not allow access to target id > 15 or LUN > 7 1815 if (target > 15 || SCP2LUN(scp) > 7) { 1816 scp->result = (DID_BAD_TARGET << 16); 1817 return NULL; 1818 } 1819 1820 // if fast load option was set and scan for last device is 1821 // over, reset the fast_load flag so that during a possible 1822 // next scan, devices can be made available 1823 if (rdev->fast_load && (target == 15) && 1824 (SCP2CHANNEL(scp) == adapter->max_channel -1)) { 1825 1826 con_log(CL_ANN, (KERN_INFO 1827 "megaraid[%d]: physical device scan re-enabled\n", 1828 adapter->host->host_no)); 1829 rdev->fast_load = 0; 1830 } 1831 1832 /* 1833 * Display the channel scan for physical devices 1834 */ 1835 if (!(rdev->last_disp & (1L << SCP2CHANNEL(scp)))) { 1836 1837 ss = rdev->fast_load ? skip : scan; 1838 1839 con_log(CL_ANN, (KERN_INFO 1840 "scsi[%d]: %s scsi channel %d [Phy %d]", 1841 adapter->host->host_no, ss, SCP2CHANNEL(scp), 1842 channel)); 1843 1844 con_log(CL_ANN, ( 1845 " for non-raid devices\n")); 1846 1847 rdev->last_disp |= (1L << SCP2CHANNEL(scp)); 1848 } 1849 1850 // disable channel sweep if fast load option given 1851 if (rdev->fast_load) { 1852 scp->result = (DID_BAD_TARGET << 16); 1853 return NULL; 1854 } 1855 1856 // Allocate a SCB and initialize passthru 1857 if (!(scb = megaraid_alloc_scb(adapter, scp))) { 1858 scp->result = (DID_ERROR << 16); 1859 *busy = 1; 1860 return NULL; 1861 } 1862 1863 ccb = (mbox_ccb_t *)scb->ccb; 1864 scb->dev_channel = channel; 1865 scb->dev_target = target; 1866 scb->dma_direction = scp->sc_data_direction; 1867 mbox = ccb->mbox; 1868 mbox64 = ccb->mbox64; 1869 1870 // Does this firmware support extended CDBs 1871 if (adapter->max_cdb_sz == 16) { 1872 mbox->cmd = MBOXCMD_EXTPTHRU; 1873 1874 megaraid_mbox_prepare_epthru(adapter, scb, scp); 1875 1876 mbox64->xferaddr_lo = (uint32_t)ccb->epthru_dma_h; 1877 mbox64->xferaddr_hi = 0; 1878 mbox->xferaddr = 0xFFFFFFFF; 1879 } 1880 else { 1881 mbox->cmd = MBOXCMD_PASSTHRU64; 1882 1883 megaraid_mbox_prepare_pthru(adapter, scb, scp); 1884 1885 mbox64->xferaddr_lo = (uint32_t)ccb->pthru_dma_h; 1886 mbox64->xferaddr_hi = 0; 1887 mbox->xferaddr = 0xFFFFFFFF; 1888 } 1889 return scb; 1890 } 1891 1892 // NOT REACHED 1893} 1894 1895 1896/** 1897 * megaraid_mbox_runpendq - execute commands queued in the pending queue 1898 * @adapter : controller's soft state 1899 * @scb_q : SCB to be queued in the pending list 1900 * 1901 * Scan the pending list for commands which are not yet issued and try to 1902 * post to the controller. The SCB can be a null pointer, which would indicate 1903 * no SCB to be queue, just try to execute the ones in the pending list. 1904 * 1905 * NOTE: We do not actually traverse the pending list. The SCBs are plucked 1906 * out from the head of the pending list. If it is successfully issued, the 1907 * next SCB is at the head now. 1908 */ 1909static void 1910megaraid_mbox_runpendq(adapter_t *adapter, scb_t *scb_q) 1911{ 1912 scb_t *scb; 1913 unsigned long flags; 1914 1915 spin_lock_irqsave(PENDING_LIST_LOCK(adapter), flags); 1916 1917 if (scb_q) { 1918 scb_q->state = SCB_PENDQ; 1919 list_add_tail(&scb_q->list, &adapter->pend_list); 1920 } 1921 1922 // if the adapter in not in quiescent mode, post the commands to FW 1923 if (adapter->quiescent) { 1924 spin_unlock_irqrestore(PENDING_LIST_LOCK(adapter), flags); 1925 return; 1926 } 1927 1928 while (!list_empty(&adapter->pend_list)) { 1929 1930 assert_spin_locked(PENDING_LIST_LOCK(adapter)); 1931 1932 scb = list_entry(adapter->pend_list.next, scb_t, list); 1933 1934 // remove the scb from the pending list and try to 1935 // issue. If we are unable to issue it, put back in 1936 // the pending list and return 1937 1938 list_del_init(&scb->list); 1939 1940 spin_unlock_irqrestore(PENDING_LIST_LOCK(adapter), flags); 1941 1942 // if mailbox was busy, return SCB back to pending 1943 // list. Make sure to add at the head, since that's 1944 // where it would have been removed from 1945 1946 scb->state = SCB_ISSUED; 1947 1948 if (mbox_post_cmd(adapter, scb) != 0) { 1949 1950 spin_lock_irqsave(PENDING_LIST_LOCK(adapter), flags); 1951 1952 scb->state = SCB_PENDQ; 1953 1954 list_add(&scb->list, &adapter->pend_list); 1955 1956 spin_unlock_irqrestore(PENDING_LIST_LOCK(adapter), 1957 flags); 1958 1959 return; 1960 } 1961 1962 spin_lock_irqsave(PENDING_LIST_LOCK(adapter), flags); 1963 } 1964 1965 spin_unlock_irqrestore(PENDING_LIST_LOCK(adapter), flags); 1966 1967 1968 return; 1969} 1970 1971 1972/** 1973 * megaraid_mbox_prepare_pthru - prepare a command for physical devices 1974 * @adapter : pointer to controller's soft state 1975 * @scb : scsi control block 1976 * @scp : scsi command from the mid-layer 1977 * 1978 * Prepare a command for the scsi physical devices. 1979 */ 1980static void 1981megaraid_mbox_prepare_pthru(adapter_t *adapter, scb_t *scb, 1982 struct scsi_cmnd *scp) 1983{ 1984 mbox_ccb_t *ccb; 1985 mraid_passthru_t *pthru; 1986 uint8_t channel; 1987 uint8_t target; 1988 1989 ccb = (mbox_ccb_t *)scb->ccb; 1990 pthru = ccb->pthru; 1991 channel = scb->dev_channel; 1992 target = scb->dev_target; 1993 1994 // 0=6sec, 1=60sec, 2=10min, 3=3hrs, 4=NO timeout 1995 pthru->timeout = 4; 1996 pthru->ars = 1; 1997 pthru->islogical = 0; 1998 pthru->channel = 0; 1999 pthru->target = (channel << 4) | target; 2000 pthru->logdrv = SCP2LUN(scp); 2001 pthru->reqsenselen = 14; 2002 pthru->cdblen = scp->cmd_len; 2003 2004 memcpy(pthru->cdb, scp->cmnd, scp->cmd_len); 2005 2006 if (scsi_bufflen(scp)) { 2007 pthru->dataxferlen = scsi_bufflen(scp); 2008 pthru->dataxferaddr = ccb->sgl_dma_h; 2009 pthru->numsge = megaraid_mbox_mksgl(adapter, scb); 2010 } 2011 else { 2012 pthru->dataxferaddr = 0; 2013 pthru->dataxferlen = 0; 2014 pthru->numsge = 0; 2015 } 2016 return; 2017} 2018 2019 2020/** 2021 * megaraid_mbox_prepare_epthru - prepare a command for physical devices 2022 * @adapter : pointer to controller's soft state 2023 * @scb : scsi control block 2024 * @scp : scsi command from the mid-layer 2025 * 2026 * Prepare a command for the scsi physical devices. This rountine prepares 2027 * commands for devices which can take extended CDBs (>10 bytes). 2028 */ 2029static void 2030megaraid_mbox_prepare_epthru(adapter_t *adapter, scb_t *scb, 2031 struct scsi_cmnd *scp) 2032{ 2033 mbox_ccb_t *ccb; 2034 mraid_epassthru_t *epthru; 2035 uint8_t channel; 2036 uint8_t target; 2037 2038 ccb = (mbox_ccb_t *)scb->ccb; 2039 epthru = ccb->epthru; 2040 channel = scb->dev_channel; 2041 target = scb->dev_target; 2042 2043 // 0=6sec, 1=60sec, 2=10min, 3=3hrs, 4=NO timeout 2044 epthru->timeout = 4; 2045 epthru->ars = 1; 2046 epthru->islogical = 0; 2047 epthru->channel = 0; 2048 epthru->target = (channel << 4) | target; 2049 epthru->logdrv = SCP2LUN(scp); 2050 epthru->reqsenselen = 14; 2051 epthru->cdblen = scp->cmd_len; 2052 2053 memcpy(epthru->cdb, scp->cmnd, scp->cmd_len); 2054 2055 if (scsi_bufflen(scp)) { 2056 epthru->dataxferlen = scsi_bufflen(scp); 2057 epthru->dataxferaddr = ccb->sgl_dma_h; 2058 epthru->numsge = megaraid_mbox_mksgl(adapter, scb); 2059 } 2060 else { 2061 epthru->dataxferaddr = 0; 2062 epthru->dataxferlen = 0; 2063 epthru->numsge = 0; 2064 } 2065 return; 2066} 2067 2068 2069/** 2070 * megaraid_ack_sequence - interrupt ack sequence for memory mapped HBAs 2071 * @adapter : controller's soft state 2072 * 2073 * Interrupt acknowledgement sequence for memory mapped HBAs. Find out the 2074 * completed command and put them on the completed list for later processing. 2075 * 2076 * Returns: 1 if the interrupt is valid, 0 otherwise 2077 */ 2078static int 2079megaraid_ack_sequence(adapter_t *adapter) 2080{ 2081 mraid_device_t *raid_dev = ADAP2RAIDDEV(adapter); 2082 mbox_t *mbox; 2083 scb_t *scb; 2084 uint8_t nstatus; 2085 uint8_t completed[MBOX_MAX_FIRMWARE_STATUS]; 2086 struct list_head clist; 2087 int handled; 2088 uint32_t dword; 2089 unsigned long flags; 2090 int i, j; 2091 2092 2093 mbox = raid_dev->mbox; 2094 2095 // move the SCBs from the firmware completed array to our local list 2096 INIT_LIST_HEAD(&clist); 2097 2098 // loop till F/W has more commands for us to complete 2099 handled = 0; 2100 spin_lock_irqsave(MAILBOX_LOCK(raid_dev), flags); 2101 do { 2102 /* 2103 * Check if a valid interrupt is pending. If found, force the 2104 * interrupt line low. 2105 */ 2106 dword = RDOUTDOOR(raid_dev); 2107 if (dword != 0x10001234) break; 2108 2109 handled = 1; 2110 2111 WROUTDOOR(raid_dev, 0x10001234); 2112 2113 nstatus = 0; 2114 // wait for valid numstatus to post 2115 for (i = 0; i < 0xFFFFF; i++) { 2116 if (mbox->numstatus != 0xFF) { 2117 nstatus = mbox->numstatus; 2118 break; 2119 } 2120 rmb(); 2121 } 2122 mbox->numstatus = 0xFF; 2123 2124 adapter->outstanding_cmds -= nstatus; 2125 2126 for (i = 0; i < nstatus; i++) { 2127 2128 // wait for valid command index to post 2129 for (j = 0; j < 0xFFFFF; j++) { 2130 if (mbox->completed[i] != 0xFF) break; 2131 rmb(); 2132 } 2133 completed[i] = mbox->completed[i]; 2134 mbox->completed[i] = 0xFF; 2135 2136 if (completed[i] == 0xFF) { 2137 con_log(CL_ANN, (KERN_CRIT 2138 "megaraid: command posting timed out\n")); 2139 2140 BUG(); 2141 continue; 2142 } 2143 2144 // Get SCB associated with this command id 2145 if (completed[i] >= MBOX_MAX_SCSI_CMDS) { 2146 // a cmm command 2147 scb = adapter->uscb_list + (completed[i] - 2148 MBOX_MAX_SCSI_CMDS); 2149 } 2150 else { 2151 // an os command 2152 scb = adapter->kscb_list + completed[i]; 2153 } 2154 2155 scb->status = mbox->status; 2156 list_add_tail(&scb->list, &clist); 2157 } 2158 2159 // Acknowledge interrupt 2160 WRINDOOR(raid_dev, 0x02); 2161 2162 } while(1); 2163 2164 spin_unlock_irqrestore(MAILBOX_LOCK(raid_dev), flags); 2165 2166 2167 // put the completed commands in the completed list. DPC would 2168 // complete these commands later 2169 spin_lock_irqsave(COMPLETED_LIST_LOCK(adapter), flags); 2170 2171 list_splice(&clist, &adapter->completed_list); 2172 2173 spin_unlock_irqrestore(COMPLETED_LIST_LOCK(adapter), flags); 2174 2175 2176 // schedule the DPC if there is some work for it 2177 if (handled) 2178 tasklet_schedule(&adapter->dpc_h); 2179 2180 return handled; 2181} 2182 2183 2184/** 2185 * megaraid_isr - isr for memory based mailbox based controllers 2186 * @irq : irq 2187 * @devp : pointer to our soft state 2188 * 2189 * Interrupt service routine for memory-mapped mailbox controllers. 2190 */ 2191static irqreturn_t 2192megaraid_isr(int irq, void *devp) 2193{ 2194 adapter_t *adapter = devp; 2195 int handled; 2196 2197 handled = megaraid_ack_sequence(adapter); 2198 2199 /* Loop through any pending requests */ 2200 if (!adapter->quiescent) { 2201 megaraid_mbox_runpendq(adapter, NULL); 2202 } 2203 2204 return IRQ_RETVAL(handled); 2205} 2206 2207 2208/** 2209 * megaraid_mbox_sync_scb - sync kernel buffers 2210 * @adapter : controller's soft state 2211 * @scb : pointer to the resource packet 2212 * 2213 * DMA sync if required. 2214 */ 2215static void 2216megaraid_mbox_sync_scb(adapter_t *adapter, scb_t *scb) 2217{ 2218 mbox_ccb_t *ccb; 2219 2220 ccb = (mbox_ccb_t *)scb->ccb; 2221 2222 if (scb->dma_direction == PCI_DMA_FROMDEVICE) 2223 pci_dma_sync_sg_for_cpu(adapter->pdev, 2224 scsi_sglist(scb->scp), 2225 scsi_sg_count(scb->scp), 2226 PCI_DMA_FROMDEVICE); 2227 2228 scsi_dma_unmap(scb->scp); 2229 return; 2230} 2231 2232 2233/** 2234 * megaraid_mbox_dpc - the tasklet to complete the commands from completed list 2235 * @devp : pointer to HBA soft state 2236 * 2237 * Pick up the commands from the completed list and send back to the owners. 2238 * This is a reentrant function and does not assume any locks are held while 2239 * it is being called. 2240 */ 2241static void 2242megaraid_mbox_dpc(unsigned long devp) 2243{ 2244 adapter_t *adapter = (adapter_t *)devp; 2245 mraid_device_t *raid_dev; 2246 struct list_head clist; 2247 struct scatterlist *sgl; 2248 scb_t *scb; 2249 scb_t *tmp; 2250 struct scsi_cmnd *scp; 2251 mraid_passthru_t *pthru; 2252 mraid_epassthru_t *epthru; 2253 mbox_ccb_t *ccb; 2254 int islogical; 2255 int pdev_index; 2256 int pdev_state; 2257 mbox_t *mbox; 2258 unsigned long flags; 2259 uint8_t c; 2260 int status; 2261 uioc_t *kioc; 2262 2263 2264 if (!adapter) return; 2265 2266 raid_dev = ADAP2RAIDDEV(adapter); 2267 2268 // move the SCBs from the completed list to our local list 2269 INIT_LIST_HEAD(&clist); 2270 2271 spin_lock_irqsave(COMPLETED_LIST_LOCK(adapter), flags); 2272 2273 list_splice_init(&adapter->completed_list, &clist); 2274 2275 spin_unlock_irqrestore(COMPLETED_LIST_LOCK(adapter), flags); 2276 2277 2278 list_for_each_entry_safe(scb, tmp, &clist, list) { 2279 2280 status = scb->status; 2281 scp = scb->scp; 2282 ccb = (mbox_ccb_t *)scb->ccb; 2283 pthru = ccb->pthru; 2284 epthru = ccb->epthru; 2285 mbox = ccb->mbox; 2286 2287 // Make sure f/w has completed a valid command 2288 if (scb->state != SCB_ISSUED) { 2289 con_log(CL_ANN, (KERN_CRIT 2290 "megaraid critical err: invalid command %d:%d:%p\n", 2291 scb->sno, scb->state, scp)); 2292 BUG(); 2293 continue; // Must never happen! 2294 } 2295 2296 // check for the management command and complete it right away 2297 if (scb->sno >= MBOX_MAX_SCSI_CMDS) { 2298 scb->state = SCB_FREE; 2299 scb->status = status; 2300 2301 // remove from local clist 2302 list_del_init(&scb->list); 2303 2304 kioc = (uioc_t *)scb->gp; 2305 kioc->status = 0; 2306 2307 megaraid_mbox_mm_done(adapter, scb); 2308 2309 continue; 2310 } 2311 2312 // Was an abort issued for this command earlier 2313 if (scb->state & SCB_ABORT) { 2314 con_log(CL_ANN, (KERN_NOTICE 2315 "megaraid: aborted cmd %lx[%x] completed\n", 2316 scp->serial_number, scb->sno)); 2317 } 2318 2319 /* 2320 * If the inquiry came of a disk drive which is not part of 2321 * any RAID array, expose it to the kernel. For this to be 2322 * enabled, user must set the "megaraid_expose_unconf_disks" 2323 * flag to 1 by specifying it on module parameter list. 2324 * This would enable data migration off drives from other 2325 * configurations. 2326 */ 2327 islogical = MRAID_IS_LOGICAL(adapter, scp); 2328 if (scp->cmnd[0] == INQUIRY && status == 0 && islogical == 0 2329 && IS_RAID_CH(raid_dev, scb->dev_channel)) { 2330 2331 sgl = scsi_sglist(scp); 2332 if (sg_page(sgl)) { 2333 c = *(unsigned char *) sg_virt(&sgl[0]); 2334 } else { 2335 con_log(CL_ANN, (KERN_WARNING 2336 "megaraid mailbox: invalid sg:%d\n", 2337 __LINE__)); 2338 c = 0; 2339 } 2340 2341 if ((c & 0x1F ) == TYPE_DISK) { 2342 pdev_index = (scb->dev_channel * 16) + 2343 scb->dev_target; 2344 pdev_state = 2345 raid_dev->pdrv_state[pdev_index] & 0x0F; 2346 2347 if (pdev_state == PDRV_ONLINE || 2348 pdev_state == PDRV_FAILED || 2349 pdev_state == PDRV_RBLD || 2350 pdev_state == PDRV_HOTSPARE || 2351 megaraid_expose_unconf_disks == 0) { 2352 2353 status = 0xF0; 2354 } 2355 } 2356 } 2357 2358 // Convert MegaRAID status to Linux error code 2359 switch (status) { 2360 2361 case 0x00: 2362 2363 scp->result = (DID_OK << 16); 2364 break; 2365 2366 case 0x02: 2367 2368 /* set sense_buffer and result fields */ 2369 if (mbox->cmd == MBOXCMD_PASSTHRU || 2370 mbox->cmd == MBOXCMD_PASSTHRU64) { 2371 2372 memcpy(scp->sense_buffer, pthru->reqsensearea, 2373 14); 2374 2375 scp->result = DRIVER_SENSE << 24 | 2376 DID_OK << 16 | CHECK_CONDITION << 1; 2377 } 2378 else { 2379 if (mbox->cmd == MBOXCMD_EXTPTHRU) { 2380 2381 memcpy(scp->sense_buffer, 2382 epthru->reqsensearea, 14); 2383 2384 scp->result = DRIVER_SENSE << 24 | 2385 DID_OK << 16 | 2386 CHECK_CONDITION << 1; 2387 } else { 2388 scp->sense_buffer[0] = 0x70; 2389 scp->sense_buffer[2] = ABORTED_COMMAND; 2390 scp->result = CHECK_CONDITION << 1; 2391 } 2392 } 2393 break; 2394 2395 case 0x08: 2396 2397 scp->result = DID_BUS_BUSY << 16 | status; 2398 break; 2399 2400 default: 2401 2402 /* 2403 * If TEST_UNIT_READY fails, we know RESERVATION_STATUS 2404 * failed 2405 */ 2406 if (scp->cmnd[0] == TEST_UNIT_READY) { 2407 scp->result = DID_ERROR << 16 | 2408 RESERVATION_CONFLICT << 1; 2409 } 2410 else 2411 /* 2412 * Error code returned is 1 if Reserve or Release 2413 * failed or the input parameter is invalid 2414 */ 2415 if (status == 1 && (scp->cmnd[0] == RESERVE || 2416 scp->cmnd[0] == RELEASE)) { 2417 2418 scp->result = DID_ERROR << 16 | 2419 RESERVATION_CONFLICT << 1; 2420 } 2421 else { 2422 scp->result = DID_BAD_TARGET << 16 | status; 2423 } 2424 } 2425 2426 // print a debug message for all failed commands 2427 if (status) { 2428 megaraid_mbox_display_scb(adapter, scb); 2429 } 2430 2431 // Free our internal resources and call the mid-layer callback 2432 // routine 2433 megaraid_mbox_sync_scb(adapter, scb); 2434 2435 // remove from local clist 2436 list_del_init(&scb->list); 2437 2438 // put back in free list 2439 megaraid_dealloc_scb(adapter, scb); 2440 2441 // send the scsi packet back to kernel 2442 scp->scsi_done(scp); 2443 } 2444 2445 return; 2446} 2447 2448 2449/** 2450 * megaraid_abort_handler - abort the scsi command 2451 * @scp : command to be aborted 2452 * 2453 * Abort a previous SCSI request. Only commands on the pending list can be 2454 * aborted. All the commands issued to the F/W must complete. 2455 **/ 2456static int 2457megaraid_abort_handler(struct scsi_cmnd *scp) 2458{ 2459 adapter_t *adapter; 2460 mraid_device_t *raid_dev; 2461 scb_t *scb; 2462 scb_t *tmp; 2463 int found; 2464 unsigned long flags; 2465 int i; 2466 2467 2468 adapter = SCP2ADAPTER(scp); 2469 raid_dev = ADAP2RAIDDEV(adapter); 2470 2471 con_log(CL_ANN, (KERN_WARNING 2472 "megaraid: aborting-%ld cmd=%x <c=%d t=%d l=%d>\n", 2473 scp->serial_number, scp->cmnd[0], SCP2CHANNEL(scp), 2474 SCP2TARGET(scp), SCP2LUN(scp))); 2475 2476 // If FW has stopped responding, simply return failure 2477 if (raid_dev->hw_error) { 2478 con_log(CL_ANN, (KERN_NOTICE 2479 "megaraid: hw error, not aborting\n")); 2480 return FAILED; 2481 } 2482 2483 // There might a race here, where the command was completed by the 2484 // firmware and now it is on the completed list. Before we could 2485 // complete the command to the kernel in dpc, the abort came. 2486 // Find out if this is the case to avoid the race. 2487 scb = NULL; 2488 spin_lock_irqsave(COMPLETED_LIST_LOCK(adapter), flags); 2489 list_for_each_entry_safe(scb, tmp, &adapter->completed_list, list) { 2490 2491 if (scb->scp == scp) { // Found command 2492 2493 list_del_init(&scb->list); // from completed list 2494 2495 con_log(CL_ANN, (KERN_WARNING 2496 "megaraid: %ld:%d[%d:%d], abort from completed list\n", 2497 scp->serial_number, scb->sno, 2498 scb->dev_channel, scb->dev_target)); 2499 2500 scp->result = (DID_ABORT << 16); 2501 scp->scsi_done(scp); 2502 2503 megaraid_dealloc_scb(adapter, scb); 2504 2505 spin_unlock_irqrestore(COMPLETED_LIST_LOCK(adapter), 2506 flags); 2507 2508 return SUCCESS; 2509 } 2510 } 2511 spin_unlock_irqrestore(COMPLETED_LIST_LOCK(adapter), flags); 2512 2513 2514 // Find out if this command is still on the pending list. If it is and 2515 // was never issued, abort and return success. If the command is owned 2516 // by the firmware, we must wait for it to complete by the FW. 2517 spin_lock_irqsave(PENDING_LIST_LOCK(adapter), flags); 2518 list_for_each_entry_safe(scb, tmp, &adapter->pend_list, list) { 2519 2520 if (scb->scp == scp) { // Found command 2521 2522 list_del_init(&scb->list); // from pending list 2523 2524 ASSERT(!(scb->state & SCB_ISSUED)); 2525 2526 con_log(CL_ANN, (KERN_WARNING 2527 "megaraid abort: %ld[%d:%d], driver owner\n", 2528 scp->serial_number, scb->dev_channel, 2529 scb->dev_target)); 2530 2531 scp->result = (DID_ABORT << 16); 2532 scp->scsi_done(scp); 2533 2534 megaraid_dealloc_scb(adapter, scb); 2535 2536 spin_unlock_irqrestore(PENDING_LIST_LOCK(adapter), 2537 flags); 2538 2539 return SUCCESS; 2540 } 2541 } 2542 spin_unlock_irqrestore(PENDING_LIST_LOCK(adapter), flags); 2543 2544 2545 // Check do we even own this command, in which case this would be 2546 // owned by the firmware. The only way to locate the FW scb is to 2547 // traverse through the list of all SCB, since driver does not 2548 // maintain these SCBs on any list 2549 found = 0; 2550 spin_lock_irq(&adapter->lock); 2551 for (i = 0; i < MBOX_MAX_SCSI_CMDS; i++) { 2552 scb = adapter->kscb_list + i; 2553 2554 if (scb->scp == scp) { 2555 2556 found = 1; 2557 2558 if (!(scb->state & SCB_ISSUED)) { 2559 con_log(CL_ANN, (KERN_WARNING 2560 "megaraid abort: %ld%d[%d:%d], invalid state\n", 2561 scp->serial_number, scb->sno, scb->dev_channel, 2562 scb->dev_target)); 2563 BUG(); 2564 } 2565 else { 2566 con_log(CL_ANN, (KERN_WARNING 2567 "megaraid abort: %ld:%d[%d:%d], fw owner\n", 2568 scp->serial_number, scb->sno, scb->dev_channel, 2569 scb->dev_target)); 2570 } 2571 } 2572 } 2573 spin_unlock_irq(&adapter->lock); 2574 2575 if (!found) { 2576 con_log(CL_ANN, (KERN_WARNING 2577 "megaraid abort: scsi cmd:%ld, do now own\n", 2578 scp->serial_number)); 2579 2580 return SUCCESS; 2581 } 2582 2583 // We cannot actually abort a command owned by firmware, return 2584 // failure and wait for reset. In host reset handler, we will find out 2585 // if the HBA is still live 2586 return FAILED; 2587} 2588 2589/** 2590 * megaraid_reset_handler - device reset hadler for mailbox based driver 2591 * @scp : reference command 2592 * 2593 * Reset handler for the mailbox based controller. First try to find out if 2594 * the FW is still live, in which case the outstanding commands counter mut go 2595 * down to 0. If that happens, also issue the reservation reset command to 2596 * relinquish (possible) reservations on the logical drives connected to this 2597 * host. 2598 **/ 2599static int 2600megaraid_reset_handler(struct scsi_cmnd *scp) 2601{ 2602 adapter_t *adapter; 2603 scb_t *scb; 2604 scb_t *tmp; 2605 mraid_device_t *raid_dev; 2606 unsigned long flags; 2607 uint8_t raw_mbox[sizeof(mbox_t)]; 2608 int rval; 2609 int recovery_window; 2610 int recovering; 2611 int i; 2612 uioc_t *kioc; 2613 2614 adapter = SCP2ADAPTER(scp); 2615 raid_dev = ADAP2RAIDDEV(adapter); 2616 2617 // return failure if adapter is not responding 2618 if (raid_dev->hw_error) { 2619 con_log(CL_ANN, (KERN_NOTICE 2620 "megaraid: hw error, cannot reset\n")); 2621 return FAILED; 2622 } 2623 2624 2625 // Under exceptional conditions, FW can take up to 3 minutes to 2626 // complete command processing. Wait for additional 2 minutes for the 2627 // pending commands counter to go down to 0. If it doesn't, let the 2628 // controller be marked offline 2629 // Also, reset all the commands currently owned by the driver 2630 spin_lock_irqsave(PENDING_LIST_LOCK(adapter), flags); 2631 list_for_each_entry_safe(scb, tmp, &adapter->pend_list, list) { 2632 list_del_init(&scb->list); // from pending list 2633 2634 if (scb->sno >= MBOX_MAX_SCSI_CMDS) { 2635 con_log(CL_ANN, (KERN_WARNING 2636 "megaraid: IOCTL packet with %d[%d:%d] being reset\n", 2637 scb->sno, scb->dev_channel, scb->dev_target)); 2638 2639 scb->status = -1; 2640 2641 kioc = (uioc_t *)scb->gp; 2642 kioc->status = -EFAULT; 2643 2644 megaraid_mbox_mm_done(adapter, scb); 2645 } else { 2646 if (scb->scp == scp) { // Found command 2647 con_log(CL_ANN, (KERN_WARNING 2648 "megaraid: %ld:%d[%d:%d], reset from pending list\n", 2649 scp->serial_number, scb->sno, 2650 scb->dev_channel, scb->dev_target)); 2651 } else { 2652 con_log(CL_ANN, (KERN_WARNING 2653 "megaraid: IO packet with %d[%d:%d] being reset\n", 2654 scb->sno, scb->dev_channel, scb->dev_target)); 2655 } 2656 2657 scb->scp->result = (DID_RESET << 16); 2658 scb->scp->scsi_done(scb->scp); 2659 2660 megaraid_dealloc_scb(adapter, scb); 2661 } 2662 } 2663 spin_unlock_irqrestore(PENDING_LIST_LOCK(adapter), flags); 2664 2665 if (adapter->outstanding_cmds) { 2666 con_log(CL_ANN, (KERN_NOTICE 2667 "megaraid: %d outstanding commands. Max wait %d sec\n", 2668 adapter->outstanding_cmds, 2669 (MBOX_RESET_WAIT + MBOX_RESET_EXT_WAIT))); 2670 } 2671 2672 recovery_window = MBOX_RESET_WAIT + MBOX_RESET_EXT_WAIT; 2673 2674 recovering = adapter->outstanding_cmds; 2675 2676 for (i = 0; i < recovery_window; i++) { 2677 2678 megaraid_ack_sequence(adapter); 2679 2680 // print a message once every 5 seconds only 2681 if (!(i % 5)) { 2682 con_log(CL_ANN, ( 2683 "megaraid mbox: Wait for %d commands to complete:%d\n", 2684 adapter->outstanding_cmds, 2685 (MBOX_RESET_WAIT + MBOX_RESET_EXT_WAIT) - i)); 2686 } 2687 2688 // bailout if no recovery happended in reset time 2689 if (adapter->outstanding_cmds == 0) { 2690 break; 2691 } 2692 2693 msleep(1000); 2694 } 2695 2696 spin_lock(&adapter->lock); 2697 2698 // If still outstanding commands, bail out 2699 if (adapter->outstanding_cmds) { 2700 con_log(CL_ANN, (KERN_WARNING 2701 "megaraid mbox: critical hardware error!\n")); 2702 2703 raid_dev->hw_error = 1; 2704 2705 rval = FAILED; 2706 goto out; 2707 } 2708 else { 2709 con_log(CL_ANN, (KERN_NOTICE 2710 "megaraid mbox: reset sequence completed successfully\n")); 2711 } 2712 2713 2714 // If the controller supports clustering, reset reservations 2715 if (!adapter->ha) { 2716 rval = SUCCESS; 2717 goto out; 2718 } 2719 2720 // clear reservations if any 2721 raw_mbox[0] = CLUSTER_CMD; 2722 raw_mbox[2] = RESET_RESERVATIONS; 2723 2724 rval = SUCCESS; 2725 if (mbox_post_sync_cmd_fast(adapter, raw_mbox) == 0) { 2726 con_log(CL_ANN, 2727 (KERN_INFO "megaraid: reservation reset\n")); 2728 } 2729 else { 2730 rval = FAILED; 2731 con_log(CL_ANN, (KERN_WARNING 2732 "megaraid: reservation reset failed\n")); 2733 } 2734 2735 out: 2736 spin_unlock_irq(&adapter->lock); 2737 return rval; 2738} 2739 2740/* 2741 * START: internal commands library 2742 * 2743 * This section of the driver has the common routine used by the driver and 2744 * also has all the FW routines 2745 */ 2746 2747/** 2748 * mbox_post_sync_cmd() - blocking command to the mailbox based controllers 2749 * @adapter : controller's soft state 2750 * @raw_mbox : the mailbox 2751 * 2752 * Issue a scb in synchronous and non-interrupt mode for mailbox based 2753 * controllers. 2754 */ 2755static int 2756mbox_post_sync_cmd(adapter_t *adapter, uint8_t raw_mbox[]) 2757{ 2758 mraid_device_t *raid_dev = ADAP2RAIDDEV(adapter); 2759 mbox64_t *mbox64; 2760 mbox_t *mbox; 2761 uint8_t status; 2762 int i; 2763 2764 2765 mbox64 = raid_dev->mbox64; 2766 mbox = raid_dev->mbox; 2767 2768 /* 2769 * Wait until mailbox is free 2770 */ 2771 if (megaraid_busywait_mbox(raid_dev) != 0) 2772 goto blocked_mailbox; 2773 2774 /* 2775 * Copy mailbox data into host structure 2776 */ 2777 memcpy((caddr_t)mbox, (caddr_t)raw_mbox, 16); 2778 mbox->cmdid = 0xFE; 2779 mbox->busy = 1; 2780 mbox->poll = 0; 2781 mbox->ack = 0; 2782 mbox->numstatus = 0xFF; 2783 mbox->status = 0xFF; 2784 2785 wmb(); 2786 WRINDOOR(raid_dev, raid_dev->mbox_dma | 0x1); 2787 2788 // wait for maximum 1 second for status to post. If the status is not 2789 // available within 1 second, assume FW is initializing and wait 2790 // for an extended amount of time 2791 if (mbox->numstatus == 0xFF) { // status not yet available 2792 udelay(25); 2793 2794 for (i = 0; mbox->numstatus == 0xFF && i < 1000; i++) { 2795 rmb(); 2796 msleep(1); 2797 } 2798 2799 2800 if (i == 1000) { 2801 con_log(CL_ANN, (KERN_NOTICE 2802 "megaraid mailbox: wait for FW to boot ")); 2803 2804 for (i = 0; (mbox->numstatus == 0xFF) && 2805 (i < MBOX_RESET_WAIT); i++) { 2806 rmb(); 2807 con_log(CL_ANN, ("\b\b\b\b\b[%03d]", 2808 MBOX_RESET_WAIT - i)); 2809 msleep(1000); 2810 } 2811 2812 if (i == MBOX_RESET_WAIT) { 2813 2814 con_log(CL_ANN, ( 2815 "\nmegaraid mailbox: status not available\n")); 2816 2817 return -1; 2818 } 2819 con_log(CL_ANN, ("\b\b\b\b\b[ok] \n")); 2820 } 2821 } 2822 2823 // wait for maximum 1 second for poll semaphore 2824 if (mbox->poll != 0x77) { 2825 udelay(25); 2826 2827 for (i = 0; (mbox->poll != 0x77) && (i < 1000); i++) { 2828 rmb(); 2829 msleep(1); 2830 } 2831 2832 if (i == 1000) { 2833 con_log(CL_ANN, (KERN_WARNING 2834 "megaraid mailbox: could not get poll semaphore\n")); 2835 return -1; 2836 } 2837 } 2838 2839 WRINDOOR(raid_dev, raid_dev->mbox_dma | 0x2); 2840 wmb(); 2841 2842 // wait for maximum 1 second for acknowledgement 2843 if (RDINDOOR(raid_dev) & 0x2) { 2844 udelay(25); 2845 2846 for (i = 0; (RDINDOOR(raid_dev) & 0x2) && (i < 1000); i++) { 2847 rmb(); 2848 msleep(1); 2849 } 2850 2851 if (i == 1000) { 2852 con_log(CL_ANN, (KERN_WARNING 2853 "megaraid mailbox: could not acknowledge\n")); 2854 return -1; 2855 } 2856 } 2857 mbox->poll = 0; 2858 mbox->ack = 0x77; 2859 2860 status = mbox->status; 2861 2862 // invalidate the completed command id array. After command 2863 // completion, firmware would write the valid id. 2864 mbox->numstatus = 0xFF; 2865 mbox->status = 0xFF; 2866 for (i = 0; i < MBOX_MAX_FIRMWARE_STATUS; i++) { 2867 mbox->completed[i] = 0xFF; 2868 } 2869 2870 return status; 2871 2872blocked_mailbox: 2873 2874 con_log(CL_ANN, (KERN_WARNING "megaraid: blocked mailbox\n") ); 2875 return -1; 2876} 2877 2878 2879/** 2880 * mbox_post_sync_cmd_fast - blocking command to the mailbox based controllers 2881 * @adapter : controller's soft state 2882 * @raw_mbox : the mailbox 2883 * 2884 * Issue a scb in synchronous and non-interrupt mode for mailbox based 2885 * controllers. This is a faster version of the synchronous command and 2886 * therefore can be called in interrupt-context as well. 2887 */ 2888static int 2889mbox_post_sync_cmd_fast(adapter_t *adapter, uint8_t raw_mbox[]) 2890{ 2891 mraid_device_t *raid_dev = ADAP2RAIDDEV(adapter); 2892 mbox_t *mbox; 2893 long i; 2894 2895 2896 mbox = raid_dev->mbox; 2897 2898 // return immediately if the mailbox is busy 2899 if (mbox->busy) return -1; 2900 2901 // Copy mailbox data into host structure 2902 memcpy((caddr_t)mbox, (caddr_t)raw_mbox, 14); 2903 mbox->cmdid = 0xFE; 2904 mbox->busy = 1; 2905 mbox->poll = 0; 2906 mbox->ack = 0; 2907 mbox->numstatus = 0xFF; 2908 mbox->status = 0xFF; 2909 2910 wmb(); 2911 WRINDOOR(raid_dev, raid_dev->mbox_dma | 0x1); 2912 2913 for (i = 0; i < MBOX_SYNC_WAIT_CNT; i++) { 2914 if (mbox->numstatus != 0xFF) break; 2915 rmb(); 2916 udelay(MBOX_SYNC_DELAY_200); 2917 } 2918 2919 if (i == MBOX_SYNC_WAIT_CNT) { 2920 // We may need to re-calibrate the counter 2921 con_log(CL_ANN, (KERN_CRIT 2922 "megaraid: fast sync command timed out\n")); 2923 } 2924 2925 WRINDOOR(raid_dev, raid_dev->mbox_dma | 0x2); 2926 wmb(); 2927 2928 return mbox->status; 2929} 2930 2931 2932/** 2933 * megaraid_busywait_mbox() - Wait until the controller's mailbox is available 2934 * @raid_dev : RAID device (HBA) soft state 2935 * 2936 * Wait until the controller's mailbox is available to accept more commands. 2937 * Wait for at most 1 second. 2938 */ 2939static int 2940megaraid_busywait_mbox(mraid_device_t *raid_dev) 2941{ 2942 mbox_t *mbox = raid_dev->mbox; 2943 int i = 0; 2944 2945 if (mbox->busy) { 2946 udelay(25); 2947 for (i = 0; mbox->busy && i < 1000; i++) 2948 msleep(1); 2949 } 2950 2951 if (i < 1000) return 0; 2952 else return -1; 2953} 2954 2955 2956/** 2957 * megaraid_mbox_product_info - some static information about the controller 2958 * @adapter : our soft state 2959 * 2960 * Issue commands to the controller to grab some parameters required by our 2961 * caller. 2962 */ 2963static int 2964megaraid_mbox_product_info(adapter_t *adapter) 2965{ 2966 mraid_device_t *raid_dev = ADAP2RAIDDEV(adapter); 2967 mbox_t *mbox; 2968 uint8_t raw_mbox[sizeof(mbox_t)]; 2969 mraid_pinfo_t *pinfo; 2970 dma_addr_t pinfo_dma_h; 2971 mraid_inquiry3_t *mraid_inq3; 2972 int i; 2973 2974 2975 memset((caddr_t)raw_mbox, 0, sizeof(raw_mbox)); 2976 mbox = (mbox_t *)raw_mbox; 2977 2978 /* 2979 * Issue an ENQUIRY3 command to find out certain adapter parameters, 2980 * e.g., max channels, max commands etc. 2981 */ 2982 pinfo = pci_alloc_consistent(adapter->pdev, sizeof(mraid_pinfo_t), 2983 &pinfo_dma_h); 2984 2985 if (pinfo == NULL) { 2986 con_log(CL_ANN, (KERN_WARNING 2987 "megaraid: out of memory, %s %d\n", __func__, 2988 __LINE__)); 2989 2990 return -1; 2991 } 2992 memset(pinfo, 0, sizeof(mraid_pinfo_t)); 2993 2994 mbox->xferaddr = (uint32_t)adapter->ibuf_dma_h; 2995 memset((void *)adapter->ibuf, 0, MBOX_IBUF_SIZE); 2996 2997 raw_mbox[0] = FC_NEW_CONFIG; 2998 raw_mbox[2] = NC_SUBOP_ENQUIRY3; 2999 raw_mbox[3] = ENQ3_GET_SOLICITED_FULL; 3000 3001 // Issue the command 3002 if (mbox_post_sync_cmd(adapter, raw_mbox) != 0) { 3003 3004 con_log(CL_ANN, (KERN_WARNING "megaraid: Inquiry3 failed\n")); 3005 3006 pci_free_consistent(adapter->pdev, sizeof(mraid_pinfo_t), 3007 pinfo, pinfo_dma_h); 3008 3009 return -1; 3010 } 3011 3012 /* 3013 * Collect information about state of each physical drive 3014 * attached to the controller. We will expose all the disks 3015 * which are not part of RAID 3016 */ 3017 mraid_inq3 = (mraid_inquiry3_t *)adapter->ibuf; 3018 for (i = 0; i < MBOX_MAX_PHYSICAL_DRIVES; i++) { 3019 raid_dev->pdrv_state[i] = mraid_inq3->pdrv_state[i]; 3020 } 3021 3022 /* 3023 * Get product info for information like number of channels, 3024 * maximum commands supported. 3025 */ 3026 memset((caddr_t)raw_mbox, 0, sizeof(raw_mbox)); 3027 mbox->xferaddr = (uint32_t)pinfo_dma_h; 3028 3029 raw_mbox[0] = FC_NEW_CONFIG; 3030 raw_mbox[2] = NC_SUBOP_PRODUCT_INFO; 3031 3032 if (mbox_post_sync_cmd(adapter, raw_mbox) != 0) { 3033 3034 con_log(CL_ANN, (KERN_WARNING 3035 "megaraid: product info failed\n")); 3036 3037 pci_free_consistent(adapter->pdev, sizeof(mraid_pinfo_t), 3038 pinfo, pinfo_dma_h); 3039 3040 return -1; 3041 } 3042 3043 /* 3044 * Setup some parameters for host, as required by our caller 3045 */ 3046 adapter->max_channel = pinfo->nchannels; 3047 3048 /* 3049 * we will export all the logical drives on a single channel. 3050 * Add 1 since inquires do not come for inititor ID 3051 */ 3052 adapter->max_target = MAX_LOGICAL_DRIVES_40LD + 1; 3053 adapter->max_lun = 8; // up to 8 LUNs for non-disk devices 3054 3055 /* 3056 * These are the maximum outstanding commands for the scsi-layer 3057 */ 3058 adapter->max_cmds = MBOX_MAX_SCSI_CMDS; 3059 3060 memset(adapter->fw_version, 0, VERSION_SIZE); 3061 memset(adapter->bios_version, 0, VERSION_SIZE); 3062 3063 memcpy(adapter->fw_version, pinfo->fw_version, 4); 3064 adapter->fw_version[4] = 0; 3065 3066 memcpy(adapter->bios_version, pinfo->bios_version, 4); 3067 adapter->bios_version[4] = 0; 3068 3069 con_log(CL_ANN, (KERN_NOTICE 3070 "megaraid: fw version:[%s] bios version:[%s]\n", 3071 adapter->fw_version, adapter->bios_version)); 3072 3073 pci_free_consistent(adapter->pdev, sizeof(mraid_pinfo_t), pinfo, 3074 pinfo_dma_h); 3075 3076 return 0; 3077} 3078 3079 3080 3081/** 3082 * megaraid_mbox_extended_cdb - check for support for extended CDBs 3083 * @adapter : soft state for the controller 3084 * 3085 * This routine check whether the controller in question supports extended 3086 * ( > 10 bytes ) CDBs. 3087 */ 3088static int 3089megaraid_mbox_extended_cdb(adapter_t *adapter) 3090{ 3091 mbox_t *mbox; 3092 uint8_t raw_mbox[sizeof(mbox_t)]; 3093 int rval; 3094 3095 mbox = (mbox_t *)raw_mbox; 3096 3097 memset((caddr_t)raw_mbox, 0, sizeof(raw_mbox)); 3098 mbox->xferaddr = (uint32_t)adapter->ibuf_dma_h; 3099 3100 memset((void *)adapter->ibuf, 0, MBOX_IBUF_SIZE); 3101 3102 raw_mbox[0] = MAIN_MISC_OPCODE; 3103 raw_mbox[2] = SUPPORT_EXT_CDB; 3104 3105 /* 3106 * Issue the command 3107 */ 3108 rval = 0; 3109 if (mbox_post_sync_cmd(adapter, raw_mbox) != 0) { 3110 rval = -1; 3111 } 3112 3113 return rval; 3114} 3115 3116 3117/** 3118 * megaraid_mbox_support_ha - Do we support clustering 3119 * @adapter : soft state for the controller 3120 * @init_id : ID of the initiator 3121 * 3122 * Determine if the firmware supports clustering and the ID of the initiator. 3123 */ 3124static int 3125megaraid_mbox_support_ha(adapter_t *adapter, uint16_t *init_id) 3126{ 3127 mbox_t *mbox; 3128 uint8_t raw_mbox[sizeof(mbox_t)]; 3129 int rval; 3130 3131 3132 mbox = (mbox_t *)raw_mbox; 3133 3134 memset((caddr_t)raw_mbox, 0, sizeof(raw_mbox)); 3135 3136 mbox->xferaddr = (uint32_t)adapter->ibuf_dma_h; 3137 3138 memset((void *)adapter->ibuf, 0, MBOX_IBUF_SIZE); 3139 3140 raw_mbox[0] = GET_TARGET_ID; 3141 3142 // Issue the command 3143 *init_id = 7; 3144 rval = -1; 3145 if (mbox_post_sync_cmd(adapter, raw_mbox) == 0) { 3146 3147 *init_id = *(uint8_t *)adapter->ibuf; 3148 3149 con_log(CL_ANN, (KERN_INFO 3150 "megaraid: cluster firmware, initiator ID: %d\n", 3151 *init_id)); 3152 3153 rval = 0; 3154 } 3155 3156 return rval; 3157} 3158 3159 3160/** 3161 * megaraid_mbox_support_random_del - Do we support random deletion 3162 * @adapter : soft state for the controller 3163 * 3164 * Determine if the firmware supports random deletion. 3165 * Return: 1 is operation supported, 0 otherwise 3166 */ 3167static int 3168megaraid_mbox_support_random_del(adapter_t *adapter) 3169{ 3170 mbox_t *mbox; 3171 uint8_t raw_mbox[sizeof(mbox_t)]; 3172 int rval; 3173 3174 /* 3175 * Newer firmware on Dell CERC expect a different 3176 * random deletion handling, so disable it. 3177 */ 3178 if (adapter->pdev->vendor == PCI_VENDOR_ID_AMI && 3179 adapter->pdev->device == PCI_DEVICE_ID_AMI_MEGARAID3 && 3180 adapter->pdev->subsystem_vendor == PCI_VENDOR_ID_DELL && 3181 adapter->pdev->subsystem_device == PCI_SUBSYS_ID_CERC_ATA100_4CH && 3182 (adapter->fw_version[0] > '6' || 3183 (adapter->fw_version[0] == '6' && 3184 adapter->fw_version[2] > '6') || 3185 (adapter->fw_version[0] == '6' 3186 && adapter->fw_version[2] == '6' 3187 && adapter->fw_version[3] > '1'))) { 3188 con_log(CL_DLEVEL1, ("megaraid: disable random deletion\n")); 3189 return 0; 3190 } 3191 3192 mbox = (mbox_t *)raw_mbox; 3193 3194 memset((caddr_t)raw_mbox, 0, sizeof(mbox_t)); 3195 3196 raw_mbox[0] = FC_DEL_LOGDRV; 3197 raw_mbox[2] = OP_SUP_DEL_LOGDRV; 3198 3199 // Issue the command 3200 rval = 0; 3201 if (mbox_post_sync_cmd(adapter, raw_mbox) == 0) { 3202 3203 con_log(CL_DLEVEL1, ("megaraid: supports random deletion\n")); 3204 3205 rval = 1; 3206 } 3207 3208 return rval; 3209} 3210 3211 3212/** 3213 * megaraid_mbox_get_max_sg - maximum sg elements supported by the firmware 3214 * @adapter : soft state for the controller 3215 * 3216 * Find out the maximum number of scatter-gather elements supported by the 3217 * firmware. 3218 */ 3219static int 3220megaraid_mbox_get_max_sg(adapter_t *adapter) 3221{ 3222 mbox_t *mbox; 3223 uint8_t raw_mbox[sizeof(mbox_t)]; 3224 int nsg; 3225 3226 3227 mbox = (mbox_t *)raw_mbox; 3228 3229 memset((caddr_t)raw_mbox, 0, sizeof(mbox_t)); 3230 3231 mbox->xferaddr = (uint32_t)adapter->ibuf_dma_h; 3232 3233 memset((void *)adapter->ibuf, 0, MBOX_IBUF_SIZE); 3234 3235 raw_mbox[0] = MAIN_MISC_OPCODE; 3236 raw_mbox[2] = GET_MAX_SG_SUPPORT; 3237 3238 // Issue the command 3239 if (mbox_post_sync_cmd(adapter, raw_mbox) == 0) { 3240 nsg = *(uint8_t *)adapter->ibuf; 3241 } 3242 else { 3243 nsg = MBOX_DEFAULT_SG_SIZE; 3244 } 3245 3246 if (nsg > MBOX_MAX_SG_SIZE) nsg = MBOX_MAX_SG_SIZE; 3247 3248 return nsg; 3249} 3250 3251 3252/** 3253 * megaraid_mbox_enum_raid_scsi - enumerate the RAID and SCSI channels 3254 * @adapter : soft state for the controller 3255 * 3256 * Enumerate the RAID and SCSI channels for ROMB platforms so that channels 3257 * can be exported as regular SCSI channels. 3258 */ 3259static void 3260megaraid_mbox_enum_raid_scsi(adapter_t *adapter) 3261{ 3262 mraid_device_t *raid_dev = ADAP2RAIDDEV(adapter); 3263 mbox_t *mbox; 3264 uint8_t raw_mbox[sizeof(mbox_t)]; 3265 3266 3267 mbox = (mbox_t *)raw_mbox; 3268 3269 memset((caddr_t)raw_mbox, 0, sizeof(mbox_t)); 3270 3271 mbox->xferaddr = (uint32_t)adapter->ibuf_dma_h; 3272 3273 memset((void *)adapter->ibuf, 0, MBOX_IBUF_SIZE); 3274 3275 raw_mbox[0] = CHNL_CLASS; 3276 raw_mbox[2] = GET_CHNL_CLASS; 3277 3278 // Issue the command. If the command fails, all channels are RAID 3279 // channels 3280 raid_dev->channel_class = 0xFF; 3281 if (mbox_post_sync_cmd(adapter, raw_mbox) == 0) { 3282 raid_dev->channel_class = *(uint8_t *)adapter->ibuf; 3283 } 3284 3285 return; 3286} 3287 3288 3289/** 3290 * megaraid_mbox_flush_cache - flush adapter and disks cache 3291 * @adapter : soft state for the controller 3292 * 3293 * Flush adapter cache followed by disks cache. 3294 */ 3295static void 3296megaraid_mbox_flush_cache(adapter_t *adapter) 3297{ 3298 mbox_t *mbox; 3299 uint8_t raw_mbox[sizeof(mbox_t)]; 3300 3301 3302 mbox = (mbox_t *)raw_mbox; 3303 3304 memset((caddr_t)raw_mbox, 0, sizeof(mbox_t)); 3305 3306 raw_mbox[0] = FLUSH_ADAPTER; 3307 3308 if (mbox_post_sync_cmd(adapter, raw_mbox) != 0) { 3309 con_log(CL_ANN, ("megaraid: flush adapter failed\n")); 3310 } 3311 3312 raw_mbox[0] = FLUSH_SYSTEM; 3313 3314 if (mbox_post_sync_cmd(adapter, raw_mbox) != 0) { 3315 con_log(CL_ANN, ("megaraid: flush disks cache failed\n")); 3316 } 3317 3318 return; 3319} 3320 3321 3322/** 3323 * megaraid_mbox_fire_sync_cmd - fire the sync cmd 3324 * @adapter : soft state for the controller 3325 * 3326 * Clears the pending cmds in FW and reinits its RAID structs. 3327 */ 3328static int 3329megaraid_mbox_fire_sync_cmd(adapter_t *adapter) 3330{ 3331 mbox_t *mbox; 3332 uint8_t raw_mbox[sizeof(mbox_t)]; 3333 mraid_device_t *raid_dev = ADAP2RAIDDEV(adapter); 3334 mbox64_t *mbox64; 3335 int status = 0; 3336 int i; 3337 uint32_t dword; 3338 3339 mbox = (mbox_t *)raw_mbox; 3340 3341 memset((caddr_t)raw_mbox, 0, sizeof(mbox_t)); 3342 3343 raw_mbox[0] = 0xFF; 3344 3345 mbox64 = raid_dev->mbox64; 3346 mbox = raid_dev->mbox; 3347 3348 /* Wait until mailbox is free */ 3349 if (megaraid_busywait_mbox(raid_dev) != 0) { 3350 status = 1; 3351 goto blocked_mailbox; 3352 } 3353 3354 /* Copy mailbox data into host structure */ 3355 memcpy((caddr_t)mbox, (caddr_t)raw_mbox, 16); 3356 mbox->cmdid = 0xFE; 3357 mbox->busy = 1; 3358 mbox->poll = 0; 3359 mbox->ack = 0; 3360 mbox->numstatus = 0; 3361 mbox->status = 0; 3362 3363 wmb(); 3364 WRINDOOR(raid_dev, raid_dev->mbox_dma | 0x1); 3365 3366 /* Wait for maximum 1 min for status to post. 3367 * If the Firmware SUPPORTS the ABOVE COMMAND, 3368 * mbox->cmd will be set to 0 3369 * else 3370 * the firmware will reject the command with 3371 * mbox->numstatus set to 1 3372 */ 3373 3374 i = 0; 3375 status = 0; 3376 while (!mbox->numstatus && mbox->cmd == 0xFF) { 3377 rmb(); 3378 msleep(1); 3379 i++; 3380 if (i > 1000 * 60) { 3381 status = 1; 3382 break; 3383 } 3384 } 3385 if (mbox->numstatus == 1) 3386 status = 1; /*cmd not supported*/ 3387 3388 /* Check for interrupt line */ 3389 dword = RDOUTDOOR(raid_dev); 3390 WROUTDOOR(raid_dev, dword); 3391 WRINDOOR(raid_dev,2); 3392 3393 return status; 3394 3395blocked_mailbox: 3396 con_log(CL_ANN, (KERN_WARNING "megaraid: blocked mailbox\n")); 3397 return status; 3398} 3399 3400/** 3401 * megaraid_mbox_display_scb - display SCB information, mostly debug purposes 3402 * @adapter : controller's soft state 3403 * @scb : SCB to be displayed 3404 * @level : debug level for console print 3405 * 3406 * Diplay information about the given SCB iff the current debug level is 3407 * verbose. 3408 */ 3409static void 3410megaraid_mbox_display_scb(adapter_t *adapter, scb_t *scb) 3411{ 3412 mbox_ccb_t *ccb; 3413 struct scsi_cmnd *scp; 3414 mbox_t *mbox; 3415 int level; 3416 int i; 3417 3418 3419 ccb = (mbox_ccb_t *)scb->ccb; 3420 scp = scb->scp; 3421 mbox = ccb->mbox; 3422 3423 level = CL_DLEVEL3; 3424 3425 con_log(level, (KERN_NOTICE 3426 "megaraid mailbox: status:%#x cmd:%#x id:%#x ", scb->status, 3427 mbox->cmd, scb->sno)); 3428 3429 con_log(level, ("sec:%#x lba:%#x addr:%#x ld:%d sg:%d\n", 3430 mbox->numsectors, mbox->lba, mbox->xferaddr, mbox->logdrv, 3431 mbox->numsge)); 3432 3433 if (!scp) return; 3434 3435 con_log(level, (KERN_NOTICE "scsi cmnd: ")); 3436 3437 for (i = 0; i < scp->cmd_len; i++) { 3438 con_log(level, ("%#2.02x ", scp->cmnd[i])); 3439 } 3440 3441 con_log(level, ("\n")); 3442 3443 return; 3444} 3445 3446 3447/** 3448 * megaraid_mbox_setup_device_map - manage device ids 3449 * @adapter : Driver's soft state 3450 * 3451 * Manange the device ids to have an appropraite mapping between the kernel 3452 * scsi addresses and megaraid scsi and logical drive addresses. We export 3453 * scsi devices on their actual addresses, whereas the logical drives are 3454 * exported on a virtual scsi channel. 3455 */ 3456static void 3457megaraid_mbox_setup_device_map(adapter_t *adapter) 3458{ 3459 uint8_t c; 3460 uint8_t t; 3461 3462 /* 3463 * First fill the values on the logical drive channel 3464 */ 3465 for (t = 0; t < LSI_MAX_LOGICAL_DRIVES_64LD; t++) 3466 adapter->device_ids[adapter->max_channel][t] = 3467 (t < adapter->init_id) ? t : t - 1; 3468 3469 adapter->device_ids[adapter->max_channel][adapter->init_id] = 0xFF; 3470 3471 /* 3472 * Fill the values on the physical devices channels 3473 */ 3474 for (c = 0; c < adapter->max_channel; c++) 3475 for (t = 0; t < LSI_MAX_LOGICAL_DRIVES_64LD; t++) 3476 adapter->device_ids[c][t] = (c << 8) | t; 3477} 3478 3479 3480/* 3481 * END: internal commands library 3482 */ 3483 3484/* 3485 * START: Interface for the common management module 3486 * 3487 * This is the module, which interfaces with the common management module to 3488 * provide support for ioctl and sysfs 3489 */ 3490 3491/** 3492 * megaraid_cmm_register - register with the management module 3493 * @adapter : HBA soft state 3494 * 3495 * Register with the management module, which allows applications to issue 3496 * ioctl calls to the drivers. This interface is used by the management module 3497 * to setup sysfs support as well. 3498 */ 3499static int 3500megaraid_cmm_register(adapter_t *adapter) 3501{ 3502 mraid_device_t *raid_dev = ADAP2RAIDDEV(adapter); 3503 mraid_mmadp_t adp; 3504 scb_t *scb; 3505 mbox_ccb_t *ccb; 3506 int rval; 3507 int i; 3508 3509 // Allocate memory for the base list of scb for management module. 3510 adapter->uscb_list = kcalloc(MBOX_MAX_USER_CMDS, sizeof(scb_t), GFP_KERNEL); 3511 3512 if (adapter->uscb_list == NULL) { 3513 con_log(CL_ANN, (KERN_WARNING 3514 "megaraid: out of memory, %s %d\n", __func__, 3515 __LINE__)); 3516 return -1; 3517 } 3518 3519 3520 // Initialize the synchronization parameters for resources for 3521 // commands for management module 3522 INIT_LIST_HEAD(&adapter->uscb_pool); 3523 3524 spin_lock_init(USER_FREE_LIST_LOCK(adapter)); 3525 3526 3527 3528 // link all the packets. Note, CCB for commands, coming from the 3529 // commom management module, mailbox physical address are already 3530 // setup by it. We just need placeholder for that in our local command 3531 // control blocks 3532 for (i = 0; i < MBOX_MAX_USER_CMDS; i++) { 3533 3534 scb = adapter->uscb_list + i; 3535 ccb = raid_dev->uccb_list + i; 3536 3537 scb->ccb = (caddr_t)ccb; 3538 ccb->mbox64 = raid_dev->umbox64 + i; 3539 ccb->mbox = &ccb->mbox64->mbox32; 3540 ccb->raw_mbox = (uint8_t *)ccb->mbox; 3541 3542 scb->gp = 0; 3543 3544 // COMMAND ID 0 - (MBOX_MAX_SCSI_CMDS-1) ARE RESERVED FOR 3545 // COMMANDS COMING FROM IO SUBSYSTEM (MID-LAYER) 3546 scb->sno = i + MBOX_MAX_SCSI_CMDS; 3547 3548 scb->scp = NULL; 3549 scb->state = SCB_FREE; 3550 scb->dma_direction = PCI_DMA_NONE; 3551 scb->dma_type = MRAID_DMA_NONE; 3552 scb->dev_channel = -1; 3553 scb->dev_target = -1; 3554 3555 // put scb in the free pool 3556 list_add_tail(&scb->list, &adapter->uscb_pool); 3557 } 3558 3559 adp.unique_id = adapter->unique_id; 3560 adp.drvr_type = DRVRTYPE_MBOX; 3561 adp.drvr_data = (unsigned long)adapter; 3562 adp.pdev = adapter->pdev; 3563 adp.issue_uioc = megaraid_mbox_mm_handler; 3564 adp.timeout = MBOX_RESET_WAIT + MBOX_RESET_EXT_WAIT; 3565 adp.max_kioc = MBOX_MAX_USER_CMDS; 3566 3567 if ((rval = mraid_mm_register_adp(&adp)) != 0) { 3568 3569 con_log(CL_ANN, (KERN_WARNING 3570 "megaraid mbox: did not register with CMM\n")); 3571 3572 kfree(adapter->uscb_list); 3573 } 3574 3575 return rval; 3576} 3577 3578 3579static int 3580megaraid_cmm_unregister(adapter_t *adapter) 3581{ 3582 kfree(adapter->uscb_list); 3583 mraid_mm_unregister_adp(adapter->unique_id); 3584 return 0; 3585} 3586 3587 3588/** 3589 * megaraid_mbox_mm_handler - interface for CMM to issue commands to LLD 3590 * @drvr_data : LLD specific data 3591 * @kioc : CMM interface packet 3592 * @action : command action 3593 * 3594 * This routine is invoked whenever the Common Management Module (CMM) has a 3595 * command for us. The 'action' parameter specifies if this is a new command 3596 * or otherwise. 3597 */ 3598static int 3599megaraid_mbox_mm_handler(unsigned long drvr_data, uioc_t *kioc, uint32_t action) 3600{ 3601 adapter_t *adapter; 3602 3603 if (action != IOCTL_ISSUE) { 3604 con_log(CL_ANN, (KERN_WARNING 3605 "megaraid: unsupported management action:%#2x\n", 3606 action)); 3607 return (-ENOTSUPP); 3608 } 3609 3610 adapter = (adapter_t *)drvr_data; 3611 3612 // make sure this adapter is not being detached right now. 3613 if (atomic_read(&adapter->being_detached)) { 3614 con_log(CL_ANN, (KERN_WARNING 3615 "megaraid: reject management request, detaching\n")); 3616 return (-ENODEV); 3617 } 3618 3619 switch (kioc->opcode) { 3620 3621 case GET_ADAP_INFO: 3622 3623 kioc->status = gather_hbainfo(adapter, (mraid_hba_info_t *) 3624 (unsigned long)kioc->buf_vaddr); 3625 3626 kioc->done(kioc); 3627 3628 return kioc->status; 3629 3630 case MBOX_CMD: 3631 3632 return megaraid_mbox_mm_command(adapter, kioc); 3633 3634 default: 3635 kioc->status = (-EINVAL); 3636 kioc->done(kioc); 3637 return (-EINVAL); 3638 } 3639 3640 return 0; // not reached 3641} 3642 3643/** 3644 * megaraid_mbox_mm_command - issues commands routed through CMM 3645 * @adapter : HBA soft state 3646 * @kioc : management command packet 3647 * 3648 * Issues commands, which are routed through the management module. 3649 */ 3650static int 3651megaraid_mbox_mm_command(adapter_t *adapter, uioc_t *kioc) 3652{ 3653 struct list_head *head = &adapter->uscb_pool; 3654 mbox64_t *mbox64; 3655 uint8_t *raw_mbox; 3656 scb_t *scb; 3657 mbox_ccb_t *ccb; 3658 unsigned long flags; 3659 3660 // detach one scb from free pool 3661 spin_lock_irqsave(USER_FREE_LIST_LOCK(adapter), flags); 3662 3663 if (list_empty(head)) { // should never happen because of CMM 3664 3665 con_log(CL_ANN, (KERN_WARNING 3666 "megaraid mbox: bug in cmm handler, lost resources\n")); 3667 3668 spin_unlock_irqrestore(USER_FREE_LIST_LOCK(adapter), flags); 3669 3670 return (-EINVAL); 3671 } 3672 3673 scb = list_entry(head->next, scb_t, list); 3674 list_del_init(&scb->list); 3675 3676 spin_unlock_irqrestore(USER_FREE_LIST_LOCK(adapter), flags); 3677 3678 scb->state = SCB_ACTIVE; 3679 scb->dma_type = MRAID_DMA_NONE; 3680 scb->dma_direction = PCI_DMA_NONE; 3681 3682 ccb = (mbox_ccb_t *)scb->ccb; 3683 mbox64 = (mbox64_t *)(unsigned long)kioc->cmdbuf; 3684 raw_mbox = (uint8_t *)&mbox64->mbox32; 3685 3686 memcpy(ccb->mbox64, mbox64, sizeof(mbox64_t)); 3687 3688 scb->gp = (unsigned long)kioc; 3689 3690 /* 3691 * If it is a logdrv random delete operation, we have to wait till 3692 * there are no outstanding cmds at the fw and then issue it directly 3693 */ 3694 if (raw_mbox[0] == FC_DEL_LOGDRV && raw_mbox[2] == OP_DEL_LOGDRV) { 3695 3696 if (wait_till_fw_empty(adapter)) { 3697 con_log(CL_ANN, (KERN_NOTICE 3698 "megaraid mbox: LD delete, timed out\n")); 3699 3700 kioc->status = -ETIME; 3701 3702 scb->status = -1; 3703 3704 megaraid_mbox_mm_done(adapter, scb); 3705 3706 return (-ETIME); 3707 } 3708 3709 INIT_LIST_HEAD(&scb->list); 3710 3711 scb->state = SCB_ISSUED; 3712 if (mbox_post_cmd(adapter, scb) != 0) { 3713 3714 con_log(CL_ANN, (KERN_NOTICE 3715 "megaraid mbox: LD delete, mailbox busy\n")); 3716 3717 kioc->status = -EBUSY; 3718 3719 scb->status = -1; 3720 3721 megaraid_mbox_mm_done(adapter, scb); 3722 3723 return (-EBUSY); 3724 } 3725 3726 return 0; 3727 } 3728 3729 // put the command on the pending list and execute 3730 megaraid_mbox_runpendq(adapter, scb); 3731 3732 return 0; 3733} 3734 3735 3736static int 3737wait_till_fw_empty(adapter_t *adapter) 3738{ 3739 unsigned long flags = 0; 3740 int i; 3741 3742 3743 /* 3744 * Set the quiescent flag to stop issuing cmds to FW. 3745 */ 3746 spin_lock_irqsave(&adapter->lock, flags); 3747 adapter->quiescent++; 3748 spin_unlock_irqrestore(&adapter->lock, flags); 3749 3750 /* 3751 * Wait till there are no more cmds outstanding at FW. Try for at most 3752 * 60 seconds 3753 */ 3754 for (i = 0; i < 60 && adapter->outstanding_cmds; i++) { 3755 con_log(CL_DLEVEL1, (KERN_INFO 3756 "megaraid: FW has %d pending commands\n", 3757 adapter->outstanding_cmds)); 3758 3759 msleep(1000); 3760 } 3761 3762 return adapter->outstanding_cmds; 3763} 3764 3765 3766/** 3767 * megaraid_mbox_mm_done - callback for CMM commands 3768 * @adapter : HBA soft state 3769 * @scb : completed command 3770 * 3771 * Callback routine for internal commands originated from the management 3772 * module. 3773 */ 3774static void 3775megaraid_mbox_mm_done(adapter_t *adapter, scb_t *scb) 3776{ 3777 uioc_t *kioc; 3778 mbox64_t *mbox64; 3779 uint8_t *raw_mbox; 3780 unsigned long flags; 3781 3782 kioc = (uioc_t *)scb->gp; 3783 mbox64 = (mbox64_t *)(unsigned long)kioc->cmdbuf; 3784 mbox64->mbox32.status = scb->status; 3785 raw_mbox = (uint8_t *)&mbox64->mbox32; 3786 3787 3788 // put scb in the free pool 3789 scb->state = SCB_FREE; 3790 scb->scp = NULL; 3791 3792 spin_lock_irqsave(USER_FREE_LIST_LOCK(adapter), flags); 3793 3794 list_add(&scb->list, &adapter->uscb_pool); 3795 3796 spin_unlock_irqrestore(USER_FREE_LIST_LOCK(adapter), flags); 3797 3798 // if a delete logical drive operation succeeded, restart the 3799 // controller 3800 if (raw_mbox[0] == FC_DEL_LOGDRV && raw_mbox[2] == OP_DEL_LOGDRV) { 3801 3802 adapter->quiescent--; 3803 3804 megaraid_mbox_runpendq(adapter, NULL); 3805 } 3806 3807 kioc->done(kioc); 3808 3809 return; 3810} 3811 3812 3813/** 3814 * gather_hbainfo - HBA characteristics for the applications 3815 * @adapter : HBA soft state 3816 * @hinfo : pointer to the caller's host info strucuture 3817 */ 3818static int 3819gather_hbainfo(adapter_t *adapter, mraid_hba_info_t *hinfo) 3820{ 3821 uint8_t dmajor; 3822 3823 dmajor = megaraid_mbox_version[0]; 3824 3825 hinfo->pci_vendor_id = adapter->pdev->vendor; 3826 hinfo->pci_device_id = adapter->pdev->device; 3827 hinfo->subsys_vendor_id = adapter->pdev->subsystem_vendor; 3828 hinfo->subsys_device_id = adapter->pdev->subsystem_device; 3829 3830 hinfo->pci_bus = adapter->pdev->bus->number; 3831 hinfo->pci_dev_fn = adapter->pdev->devfn; 3832 hinfo->pci_slot = PCI_SLOT(adapter->pdev->devfn); 3833 hinfo->irq = adapter->host->irq; 3834 hinfo->baseport = ADAP2RAIDDEV(adapter)->baseport; 3835 3836 hinfo->unique_id = (hinfo->pci_bus << 8) | adapter->pdev->devfn; 3837 hinfo->host_no = adapter->host->host_no; 3838 3839 return 0; 3840} 3841 3842/* 3843 * END: Interface for the common management module 3844 */ 3845 3846 3847 3848/** 3849 * megaraid_sysfs_alloc_resources - allocate sysfs related resources 3850 * @adapter : controller's soft state 3851 * 3852 * Allocate packets required to issue FW calls whenever the sysfs attributes 3853 * are read. These attributes would require up-to-date information from the 3854 * FW. Also set up resources for mutual exclusion to share these resources and 3855 * the wait queue. 3856 * 3857 * Return 0 on success. 3858 * Return -ERROR_CODE on failure. 3859 */ 3860static int 3861megaraid_sysfs_alloc_resources(adapter_t *adapter) 3862{ 3863 mraid_device_t *raid_dev = ADAP2RAIDDEV(adapter); 3864 int rval = 0; 3865 3866 raid_dev->sysfs_uioc = kmalloc(sizeof(uioc_t), GFP_KERNEL); 3867 3868 raid_dev->sysfs_mbox64 = kmalloc(sizeof(mbox64_t), GFP_KERNEL); 3869 3870 raid_dev->sysfs_buffer = pci_alloc_consistent(adapter->pdev, 3871 PAGE_SIZE, &raid_dev->sysfs_buffer_dma); 3872 3873 if (!raid_dev->sysfs_uioc || !raid_dev->sysfs_mbox64 || 3874 !raid_dev->sysfs_buffer) { 3875 3876 con_log(CL_ANN, (KERN_WARNING 3877 "megaraid: out of memory, %s %d\n", __func__, 3878 __LINE__)); 3879 3880 rval = -ENOMEM; 3881 3882 megaraid_sysfs_free_resources(adapter); 3883 } 3884 3885 mutex_init(&raid_dev->sysfs_mtx); 3886 3887 init_waitqueue_head(&raid_dev->sysfs_wait_q); 3888 3889 return rval; 3890} 3891 3892 3893/** 3894 * megaraid_sysfs_free_resources - free sysfs related resources 3895 * @adapter : controller's soft state 3896 * 3897 * Free packets allocated for sysfs FW commands 3898 */ 3899static void 3900megaraid_sysfs_free_resources(adapter_t *adapter) 3901{ 3902 mraid_device_t *raid_dev = ADAP2RAIDDEV(adapter); 3903 3904 kfree(raid_dev->sysfs_uioc); 3905 kfree(raid_dev->sysfs_mbox64); 3906 3907 if (raid_dev->sysfs_buffer) { 3908 pci_free_consistent(adapter->pdev, PAGE_SIZE, 3909 raid_dev->sysfs_buffer, raid_dev->sysfs_buffer_dma); 3910 } 3911} 3912 3913 3914/** 3915 * megaraid_sysfs_get_ldmap_done - callback for get ldmap 3916 * @uioc : completed packet 3917 * 3918 * Callback routine called in the ISR/tasklet context for get ldmap call 3919 */ 3920static void 3921megaraid_sysfs_get_ldmap_done(uioc_t *uioc) 3922{ 3923 adapter_t *adapter = (adapter_t *)uioc->buf_vaddr; 3924 mraid_device_t *raid_dev = ADAP2RAIDDEV(adapter); 3925 3926 uioc->status = 0; 3927 3928 wake_up(&raid_dev->sysfs_wait_q); 3929} 3930 3931 3932/** 3933 * megaraid_sysfs_get_ldmap_timeout - timeout handling for get ldmap 3934 * @data : timed out packet 3935 * 3936 * Timeout routine to recover and return to application, in case the adapter 3937 * has stopped responding. A timeout of 60 seconds for this command seems like 3938 * a good value. 3939 */ 3940static void 3941megaraid_sysfs_get_ldmap_timeout(unsigned long data) 3942{ 3943 uioc_t *uioc = (uioc_t *)data; 3944 adapter_t *adapter = (adapter_t *)uioc->buf_vaddr; 3945 mraid_device_t *raid_dev = ADAP2RAIDDEV(adapter); 3946 3947 uioc->status = -ETIME; 3948 3949 wake_up(&raid_dev->sysfs_wait_q); 3950} 3951 3952 3953/** 3954 * megaraid_sysfs_get_ldmap - get update logical drive map 3955 * @adapter : controller's soft state 3956 * 3957 * This routine will be called whenever user reads the logical drive 3958 * attributes, go get the current logical drive mapping table from the 3959 * firmware. We use the management API's to issue commands to the controller. 3960 * 3961 * NOTE: The commands issuance functionality is not generalized and 3962 * implemented in context of "get ld map" command only. If required, the 3963 * command issuance logical can be trivially pulled out and implemented as a 3964 * standalone libary. For now, this should suffice since there is no other 3965 * user of this interface. 3966 * 3967 * Return 0 on success. 3968 * Return -1 on failure. 3969 */ 3970static int 3971megaraid_sysfs_get_ldmap(adapter_t *adapter) 3972{ 3973 mraid_device_t *raid_dev = ADAP2RAIDDEV(adapter); 3974 uioc_t *uioc; 3975 mbox64_t *mbox64; 3976 mbox_t *mbox; 3977 char *raw_mbox; 3978 struct timer_list sysfs_timer; 3979 struct timer_list *timerp; 3980 caddr_t ldmap; 3981 int rval = 0; 3982 3983 /* 3984 * Allow only one read at a time to go through the sysfs attributes 3985 */ 3986 mutex_lock(&raid_dev->sysfs_mtx); 3987 3988 uioc = raid_dev->sysfs_uioc; 3989 mbox64 = raid_dev->sysfs_mbox64; 3990 ldmap = raid_dev->sysfs_buffer; 3991 3992 memset(uioc, 0, sizeof(uioc_t)); 3993 memset(mbox64, 0, sizeof(mbox64_t)); 3994 memset(ldmap, 0, sizeof(raid_dev->curr_ldmap)); 3995 3996 mbox = &mbox64->mbox32; 3997 raw_mbox = (char *)mbox; 3998 uioc->cmdbuf = (uint64_t)(unsigned long)mbox64; 3999 uioc->buf_vaddr = (caddr_t)adapter; 4000 uioc->status = -ENODATA; 4001 uioc->done = megaraid_sysfs_get_ldmap_done; 4002 4003 /* 4004 * Prepare the mailbox packet to get the current logical drive mapping 4005 * table 4006 */ 4007 mbox->xferaddr = (uint32_t)raid_dev->sysfs_buffer_dma; 4008 4009 raw_mbox[0] = FC_DEL_LOGDRV; 4010 raw_mbox[2] = OP_GET_LDID_MAP; 4011 4012 /* 4013 * Setup a timer to recover from a non-responding controller 4014 */ 4015 timerp = &sysfs_timer; 4016 init_timer(timerp); 4017 4018 timerp->function = megaraid_sysfs_get_ldmap_timeout; 4019 timerp->data = (unsigned long)uioc; 4020 timerp->expires = jiffies + 60 * HZ; 4021 4022 add_timer(timerp); 4023 4024 /* 4025 * Send the command to the firmware 4026 */ 4027 rval = megaraid_mbox_mm_command(adapter, uioc); 4028 4029 if (rval == 0) { // command successfully issued 4030 wait_event(raid_dev->sysfs_wait_q, (uioc->status != -ENODATA)); 4031 4032 /* 4033 * Check if the command timed out 4034 */ 4035 if (uioc->status == -ETIME) { 4036 con_log(CL_ANN, (KERN_NOTICE 4037 "megaraid: sysfs get ld map timed out\n")); 4038 4039 rval = -ETIME; 4040 } 4041 else { 4042 rval = mbox->status; 4043 } 4044 4045 if (rval == 0) { 4046 memcpy(raid_dev->curr_ldmap, ldmap, 4047 sizeof(raid_dev->curr_ldmap)); 4048 } 4049 else { 4050 con_log(CL_ANN, (KERN_NOTICE 4051 "megaraid: get ld map failed with %x\n", rval)); 4052 } 4053 } 4054 else { 4055 con_log(CL_ANN, (KERN_NOTICE 4056 "megaraid: could not issue ldmap command:%x\n", rval)); 4057 } 4058 4059 4060 del_timer_sync(timerp); 4061 4062 mutex_unlock(&raid_dev->sysfs_mtx); 4063 4064 return rval; 4065} 4066 4067 4068/** 4069 * megaraid_sysfs_show_app_hndl - display application handle for this adapter 4070 * @cdev : class device object representation for the host 4071 * @buf : buffer to send data to 4072 * 4073 * Display the handle used by the applications while executing management 4074 * tasks on the adapter. We invoke a management module API to get the adapter 4075 * handle, since we do not interface with applications directly. 4076 */ 4077static ssize_t 4078megaraid_sysfs_show_app_hndl(struct device *dev, struct device_attribute *attr, 4079 char *buf) 4080{ 4081 struct Scsi_Host *shost = class_to_shost(dev); 4082 adapter_t *adapter = (adapter_t *)SCSIHOST2ADAP(shost); 4083 uint32_t app_hndl; 4084 4085 app_hndl = mraid_mm_adapter_app_handle(adapter->unique_id); 4086 4087 return snprintf(buf, 8, "%u\n", app_hndl); 4088} 4089 4090 4091/** 4092 * megaraid_sysfs_show_ldnum - display the logical drive number for this device 4093 * @dev : device object representation for the scsi device 4094 * @attr : device attribute to show 4095 * @buf : buffer to send data to 4096 * 4097 * Display the logical drive number for the device in question, if it a valid 4098 * logical drive. For physical devices, "-1" is returned. 4099 * 4100 * The logical drive number is displayed in following format: 4101 * 4102 * <SCSI ID> <LD NUM> <LD STICKY ID> <APP ADAPTER HANDLE> 4103 * 4104 * <int> <int> <int> <int> 4105 */ 4106static ssize_t 4107megaraid_sysfs_show_ldnum(struct device *dev, struct device_attribute *attr, char *buf) 4108{ 4109 struct scsi_device *sdev = to_scsi_device(dev); 4110 adapter_t *adapter = (adapter_t *)SCSIHOST2ADAP(sdev->host); 4111 mraid_device_t *raid_dev = ADAP2RAIDDEV(adapter); 4112 int scsi_id = -1; 4113 int logical_drv = -1; 4114 int ldid_map = -1; 4115 uint32_t app_hndl = 0; 4116 int mapped_sdev_id; 4117 int rval; 4118 int i; 4119 4120 if (raid_dev->random_del_supported && 4121 MRAID_IS_LOGICAL_SDEV(adapter, sdev)) { 4122 4123 rval = megaraid_sysfs_get_ldmap(adapter); 4124 if (rval == 0) { 4125 4126 for (i = 0; i < MAX_LOGICAL_DRIVES_40LD; i++) { 4127 4128 mapped_sdev_id = sdev->id; 4129 4130 if (sdev->id > adapter->init_id) { 4131 mapped_sdev_id -= 1; 4132 } 4133 4134 if (raid_dev->curr_ldmap[i] == mapped_sdev_id) { 4135 4136 scsi_id = sdev->id; 4137 4138 logical_drv = i; 4139 4140 ldid_map = raid_dev->curr_ldmap[i]; 4141 4142 app_hndl = mraid_mm_adapter_app_handle( 4143 adapter->unique_id); 4144 4145 break; 4146 } 4147 } 4148 } 4149 else { 4150 con_log(CL_ANN, (KERN_NOTICE 4151 "megaraid: sysfs get ld map failed: %x\n", 4152 rval)); 4153 } 4154 } 4155 4156 return snprintf(buf, 36, "%d %d %d %d\n", scsi_id, logical_drv, 4157 ldid_map, app_hndl); 4158} 4159 4160 4161/* 4162 * END: Mailbox Low Level Driver 4163 */ 4164module_init(megaraid_init); 4165module_exit(megaraid_exit); 4166 4167/* vim: set ts=8 sw=8 tw=78 ai si: */ 4168