1 /* 2 * 3 * Linux MegaRAID device driver 4 * 5 * Copyright (c) 2003-2004 LSI Logic Corporation. 6 * 7 * This program is free software; you can redistribute it and/or 8 * modify it under the terms of the GNU General Public License 9 * as published by the Free Software Foundation; either version 10 * 2 of the License, or (at your option) any later version. 11 * 12 * FILE : megaraid_mbox.c 13 * Version : v2.20.5.1 (Nov 16 2006) 14 * 15 * Authors: 16 * Atul Mukker <Atul.Mukker@lsi.com> 17 * Sreenivas Bagalkote <Sreenivas.Bagalkote@lsi.com> 18 * Manoj Jose <Manoj.Jose@lsi.com> 19 * Seokmann Ju 20 * 21 * List of supported controllers 22 * 23 * OEM Product Name VID DID SSVID SSID 24 * --- ------------ --- --- ---- ---- 25 * Dell PERC3/QC 101E 1960 1028 0471 26 * Dell PERC3/DC 101E 1960 1028 0493 27 * Dell PERC3/SC 101E 1960 1028 0475 28 * Dell PERC3/Di 1028 1960 1028 0123 29 * Dell PERC4/SC 1000 1960 1028 0520 30 * Dell PERC4/DC 1000 1960 1028 0518 31 * Dell PERC4/QC 1000 0407 1028 0531 32 * Dell PERC4/Di 1028 000F 1028 014A 33 * Dell PERC 4e/Si 1028 0013 1028 016c 34 * Dell PERC 4e/Di 1028 0013 1028 016d 35 * Dell PERC 4e/Di 1028 0013 1028 016e 36 * Dell PERC 4e/Di 1028 0013 1028 016f 37 * Dell PERC 4e/Di 1028 0013 1028 0170 38 * Dell PERC 4e/DC 1000 0408 1028 0002 39 * Dell PERC 4e/SC 1000 0408 1028 0001 40 * 41 * 42 * LSI MegaRAID SCSI 320-0 1000 1960 1000 A520 43 * LSI MegaRAID SCSI 320-1 1000 1960 1000 0520 44 * LSI MegaRAID SCSI 320-2 1000 1960 1000 0518 45 * LSI MegaRAID SCSI 320-0X 1000 0407 1000 0530 46 * LSI MegaRAID SCSI 320-2X 1000 0407 1000 0532 47 * LSI MegaRAID SCSI 320-4X 1000 0407 1000 0531 48 * LSI MegaRAID SCSI 320-1E 1000 0408 1000 0001 49 * LSI MegaRAID SCSI 320-2E 1000 0408 1000 0002 50 * LSI MegaRAID SATA 150-4 1000 1960 1000 4523 51 * LSI MegaRAID SATA 150-6 1000 1960 1000 0523 52 * LSI MegaRAID SATA 300-4X 1000 0409 1000 3004 53 * LSI MegaRAID SATA 300-8X 1000 0409 1000 3008 54 * 55 * INTEL RAID Controller SRCU42X 1000 0407 8086 0532 56 * INTEL RAID Controller SRCS16 1000 1960 8086 0523 57 * INTEL RAID Controller SRCU42E 1000 0408 8086 0002 58 * INTEL RAID Controller SRCZCRX 1000 0407 8086 0530 59 * INTEL RAID Controller SRCS28X 1000 0409 8086 3008 60 * INTEL RAID Controller SROMBU42E 1000 0408 8086 3431 61 * INTEL RAID Controller SROMBU42E 1000 0408 8086 3499 62 * INTEL RAID Controller SRCU51L 1000 1960 8086 0520 63 * 64 * FSC MegaRAID PCI Express ROMB 1000 0408 1734 1065 65 * 66 * ACER MegaRAID ROMB-2E 1000 0408 1025 004D 67 * 68 * NEC MegaRAID PCI Express ROMB 1000 0408 1033 8287 69 * 70 * For history of changes, see Documentation/scsi/ChangeLog.megaraid 71 */ 72 73 #include <linux/slab.h> 74 #include <linux/module.h> 75 #include "megaraid_mbox.h" 76 77 static int megaraid_init(void); 78 static void megaraid_exit(void); 79 80 static int megaraid_probe_one(struct pci_dev*, const struct pci_device_id *); 81 static void megaraid_detach_one(struct pci_dev *); 82 static void megaraid_mbox_shutdown(struct pci_dev *); 83 84 static int megaraid_io_attach(adapter_t *); 85 static void megaraid_io_detach(adapter_t *); 86 87 static int megaraid_init_mbox(adapter_t *); 88 static void megaraid_fini_mbox(adapter_t *); 89 90 static int megaraid_alloc_cmd_packets(adapter_t *); 91 static void megaraid_free_cmd_packets(adapter_t *); 92 93 static int megaraid_mbox_setup_dma_pools(adapter_t *); 94 static void megaraid_mbox_teardown_dma_pools(adapter_t *); 95 96 static int megaraid_sysfs_alloc_resources(adapter_t *); 97 static void megaraid_sysfs_free_resources(adapter_t *); 98 99 static int megaraid_abort_handler(struct scsi_cmnd *); 100 static int megaraid_reset_handler(struct scsi_cmnd *); 101 102 static int mbox_post_sync_cmd(adapter_t *, uint8_t []); 103 static int mbox_post_sync_cmd_fast(adapter_t *, uint8_t []); 104 static int megaraid_busywait_mbox(mraid_device_t *); 105 static int megaraid_mbox_product_info(adapter_t *); 106 static int megaraid_mbox_extended_cdb(adapter_t *); 107 static int megaraid_mbox_support_ha(adapter_t *, uint16_t *); 108 static int megaraid_mbox_support_random_del(adapter_t *); 109 static int megaraid_mbox_get_max_sg(adapter_t *); 110 static void megaraid_mbox_enum_raid_scsi(adapter_t *); 111 static void megaraid_mbox_flush_cache(adapter_t *); 112 static int megaraid_mbox_fire_sync_cmd(adapter_t *); 113 114 static void megaraid_mbox_display_scb(adapter_t *, scb_t *); 115 static void megaraid_mbox_setup_device_map(adapter_t *); 116 117 static int megaraid_queue_command(struct Scsi_Host *, struct scsi_cmnd *); 118 static scb_t *megaraid_mbox_build_cmd(adapter_t *, struct scsi_cmnd *, int *); 119 static void megaraid_mbox_runpendq(adapter_t *, scb_t *); 120 static void megaraid_mbox_prepare_pthru(adapter_t *, scb_t *, 121 struct scsi_cmnd *); 122 static void megaraid_mbox_prepare_epthru(adapter_t *, scb_t *, 123 struct scsi_cmnd *); 124 125 static irqreturn_t megaraid_isr(int, void *); 126 127 static void megaraid_mbox_dpc(unsigned long); 128 129 static ssize_t megaraid_sysfs_show_app_hndl(struct device *, struct device_attribute *attr, char *); 130 static ssize_t megaraid_sysfs_show_ldnum(struct device *, struct device_attribute *attr, char *); 131 132 static int megaraid_cmm_register(adapter_t *); 133 static int megaraid_cmm_unregister(adapter_t *); 134 static int megaraid_mbox_mm_handler(unsigned long, uioc_t *, uint32_t); 135 static int megaraid_mbox_mm_command(adapter_t *, uioc_t *); 136 static void megaraid_mbox_mm_done(adapter_t *, scb_t *); 137 static int gather_hbainfo(adapter_t *, mraid_hba_info_t *); 138 static int wait_till_fw_empty(adapter_t *); 139 140 141 142 MODULE_AUTHOR("megaraidlinux@lsi.com"); 143 MODULE_DESCRIPTION("LSI Logic MegaRAID Mailbox Driver"); 144 MODULE_LICENSE("GPL"); 145 MODULE_VERSION(MEGARAID_VERSION); 146 147 /* 148 * ### modules parameters for driver ### 149 */ 150 151 /* 152 * Set to enable driver to expose unconfigured disk to kernel 153 */ 154 static int megaraid_expose_unconf_disks = 0; 155 module_param_named(unconf_disks, megaraid_expose_unconf_disks, int, 0); 156 MODULE_PARM_DESC(unconf_disks, 157 "Set to expose unconfigured disks to kernel (default=0)"); 158 159 /* 160 * driver wait time if the adapter's mailbox is busy 161 */ 162 static unsigned int max_mbox_busy_wait = MBOX_BUSY_WAIT; 163 module_param_named(busy_wait, max_mbox_busy_wait, int, 0); 164 MODULE_PARM_DESC(busy_wait, 165 "Max wait for mailbox in microseconds if busy (default=10)"); 166 167 /* 168 * number of sectors per IO command 169 */ 170 static unsigned int megaraid_max_sectors = MBOX_MAX_SECTORS; 171 module_param_named(max_sectors, megaraid_max_sectors, int, 0); 172 MODULE_PARM_DESC(max_sectors, 173 "Maximum number of sectors per IO command (default=128)"); 174 175 /* 176 * number of commands per logical unit 177 */ 178 static unsigned int megaraid_cmd_per_lun = MBOX_DEF_CMD_PER_LUN; 179 module_param_named(cmd_per_lun, megaraid_cmd_per_lun, int, 0); 180 MODULE_PARM_DESC(cmd_per_lun, 181 "Maximum number of commands per logical unit (default=64)"); 182 183 184 /* 185 * Fast driver load option, skip scanning for physical devices during load. 186 * This would result in non-disk devices being skipped during driver load 187 * time. These can be later added though, using /proc/scsi/scsi 188 */ 189 static unsigned int megaraid_fast_load = 0; 190 module_param_named(fast_load, megaraid_fast_load, int, 0); 191 MODULE_PARM_DESC(fast_load, 192 "Faster loading of the driver, skips physical devices! (default=0)"); 193 194 195 /* 196 * mraid_debug level - threshold for amount of information to be displayed by 197 * the driver. This level can be changed through modules parameters, ioctl or 198 * sysfs/proc interface. By default, print the announcement messages only. 199 */ 200 int mraid_debug_level = CL_ANN; 201 module_param_named(debug_level, mraid_debug_level, int, 0); 202 MODULE_PARM_DESC(debug_level, "Debug level for driver (default=0)"); 203 204 /* 205 * ### global data ### 206 */ 207 static 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 */ 214 static 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 }; 301 MODULE_DEVICE_TABLE(pci, pci_id_table_g); 302 303 304 static struct pci_driver megaraid_pci_driver = { 305 .name = "megaraid", 306 .id_table = pci_id_table_g, 307 .probe = megaraid_probe_one, 308 .remove = 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) 316 317 DEVICE_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 321 static struct device_attribute *megaraid_shost_attrs[] = { 322 &dev_attr_megaraid_mbox_app_hndl, 323 NULL, 324 }; 325 326 327 DEVICE_ATTR(megaraid_mbox_ld, S_IRUSR, megaraid_sysfs_show_ldnum, NULL); 328 329 // Host template initializer for megaraid mbox sysfs device attributes 330 static struct device_attribute *megaraid_sdev_attrs[] = { 331 &dev_attr_megaraid_mbox_ld, 332 NULL, 333 }; 334 335 /* 336 * Scsi host template for megaraid unified driver 337 */ 338 static struct scsi_host_template megaraid_template_g = { 339 .module = THIS_MODULE, 340 .name = "LSI Logic MegaRAID driver", 341 .proc_name = "megaraid", 342 .queuecommand = megaraid_queue_command, 343 .eh_abort_handler = megaraid_abort_handler, 344 .eh_host_reset_handler = megaraid_reset_handler, 345 .change_queue_depth = scsi_change_queue_depth, 346 .use_clustering = ENABLE_CLUSTERING, 347 .no_write_same = 1, 348 .sdev_attrs = megaraid_sdev_attrs, 349 .shost_attrs = megaraid_shost_attrs, 350 }; 351 352 353 /** 354 * megaraid_init - module load hook 355 * 356 * We register ourselves as hotplug enabled module and let PCI subsystem 357 * discover our adapters. 358 */ 359 static int __init 360 megaraid_init(void) 361 { 362 int rval; 363 364 // Announce the driver version 365 con_log(CL_ANN, (KERN_INFO "megaraid: %s %s\n", MEGARAID_VERSION, 366 MEGARAID_EXT_VERSION)); 367 368 // check validity of module parameters 369 if (megaraid_cmd_per_lun > MBOX_MAX_SCSI_CMDS) { 370 371 con_log(CL_ANN, (KERN_WARNING 372 "megaraid mailbox: max commands per lun reset to %d\n", 373 MBOX_MAX_SCSI_CMDS)); 374 375 megaraid_cmd_per_lun = MBOX_MAX_SCSI_CMDS; 376 } 377 378 379 // register as a PCI hot-plug driver module 380 rval = pci_register_driver(&megaraid_pci_driver); 381 if (rval < 0) { 382 con_log(CL_ANN, (KERN_WARNING 383 "megaraid: could not register hotplug support.\n")); 384 } 385 386 return rval; 387 } 388 389 390 /** 391 * megaraid_exit - driver unload entry point 392 * 393 * We simply unwrap the megaraid_init routine here. 394 */ 395 static void __exit 396 megaraid_exit(void) 397 { 398 con_log(CL_DLEVEL1, (KERN_NOTICE "megaraid: unloading framework\n")); 399 400 // unregister as PCI hotplug driver 401 pci_unregister_driver(&megaraid_pci_driver); 402 403 return; 404 } 405 406 407 /** 408 * megaraid_probe_one - PCI hotplug entry point 409 * @pdev : handle to this controller's PCI configuration space 410 * @id : pci device id of the class of controllers 411 * 412 * This routine should be called whenever a new adapter is detected by the 413 * PCI hotplug susbsystem. 414 */ 415 static int 416 megaraid_probe_one(struct pci_dev *pdev, const struct pci_device_id *id) 417 { 418 adapter_t *adapter; 419 420 421 // detected a new controller 422 con_log(CL_ANN, (KERN_INFO 423 "megaraid: probe new device %#4.04x:%#4.04x:%#4.04x:%#4.04x: ", 424 pdev->vendor, pdev->device, pdev->subsystem_vendor, 425 pdev->subsystem_device)); 426 427 con_log(CL_ANN, ("bus %d:slot %d:func %d\n", pdev->bus->number, 428 PCI_SLOT(pdev->devfn), PCI_FUNC(pdev->devfn))); 429 430 if (pci_enable_device(pdev)) { 431 con_log(CL_ANN, (KERN_WARNING 432 "megaraid: pci_enable_device failed\n")); 433 434 return -ENODEV; 435 } 436 437 // Enable bus-mastering on this controller 438 pci_set_master(pdev); 439 440 // Allocate the per driver initialization structure 441 adapter = kzalloc(sizeof(adapter_t), GFP_KERNEL); 442 443 if (adapter == NULL) { 444 con_log(CL_ANN, (KERN_WARNING 445 "megaraid: out of memory, %s %d.\n", __func__, __LINE__)); 446 447 goto out_probe_one; 448 } 449 450 451 // set up PCI related soft state and other pre-known parameters 452 adapter->unique_id = pdev->bus->number << 8 | pdev->devfn; 453 adapter->irq = pdev->irq; 454 adapter->pdev = pdev; 455 456 atomic_set(&adapter->being_detached, 0); 457 458 // Setup the default DMA mask. This would be changed later on 459 // depending on hardware capabilities 460 if (pci_set_dma_mask(adapter->pdev, DMA_BIT_MASK(32)) != 0) { 461 462 con_log(CL_ANN, (KERN_WARNING 463 "megaraid: pci_set_dma_mask failed:%d\n", __LINE__)); 464 465 goto out_free_adapter; 466 } 467 468 469 // Initialize the synchronization lock for kernel and LLD 470 spin_lock_init(&adapter->lock); 471 472 // Initialize the command queues: the list of free SCBs and the list 473 // of pending SCBs. 474 INIT_LIST_HEAD(&adapter->kscb_pool); 475 spin_lock_init(SCSI_FREE_LIST_LOCK(adapter)); 476 477 INIT_LIST_HEAD(&adapter->pend_list); 478 spin_lock_init(PENDING_LIST_LOCK(adapter)); 479 480 INIT_LIST_HEAD(&adapter->completed_list); 481 spin_lock_init(COMPLETED_LIST_LOCK(adapter)); 482 483 484 // Start the mailbox based controller 485 if (megaraid_init_mbox(adapter) != 0) { 486 con_log(CL_ANN, (KERN_WARNING 487 "megaraid: maibox adapter did not initialize\n")); 488 489 goto out_free_adapter; 490 } 491 492 // Register with LSI Common Management Module 493 if (megaraid_cmm_register(adapter) != 0) { 494 495 con_log(CL_ANN, (KERN_WARNING 496 "megaraid: could not register with management module\n")); 497 498 goto out_fini_mbox; 499 } 500 501 // setup adapter handle in PCI soft state 502 pci_set_drvdata(pdev, adapter); 503 504 // attach with scsi mid-layer 505 if (megaraid_io_attach(adapter) != 0) { 506 507 con_log(CL_ANN, (KERN_WARNING "megaraid: io attach failed\n")); 508 509 goto out_cmm_unreg; 510 } 511 512 return 0; 513 514 out_cmm_unreg: 515 megaraid_cmm_unregister(adapter); 516 out_fini_mbox: 517 megaraid_fini_mbox(adapter); 518 out_free_adapter: 519 kfree(adapter); 520 out_probe_one: 521 pci_disable_device(pdev); 522 523 return -ENODEV; 524 } 525 526 527 /** 528 * megaraid_detach_one - release framework resources and call LLD release routine 529 * @pdev : handle for our PCI configuration space 530 * 531 * This routine is called during driver unload. We free all the allocated 532 * resources and call the corresponding LLD so that it can also release all 533 * its resources. 534 * 535 * This routine is also called from the PCI hotplug system. 536 */ 537 static void 538 megaraid_detach_one(struct pci_dev *pdev) 539 { 540 adapter_t *adapter; 541 struct Scsi_Host *host; 542 543 544 // Start a rollback on this adapter 545 adapter = pci_get_drvdata(pdev); 546 547 if (!adapter) { 548 con_log(CL_ANN, (KERN_CRIT 549 "megaraid: Invalid detach on %#4.04x:%#4.04x:%#4.04x:%#4.04x\n", 550 pdev->vendor, pdev->device, pdev->subsystem_vendor, 551 pdev->subsystem_device)); 552 553 return; 554 } 555 else { 556 con_log(CL_ANN, (KERN_NOTICE 557 "megaraid: detaching device %#4.04x:%#4.04x:%#4.04x:%#4.04x\n", 558 pdev->vendor, pdev->device, pdev->subsystem_vendor, 559 pdev->subsystem_device)); 560 } 561 562 563 host = adapter->host; 564 565 // do not allow any more requests from the management module for this 566 // adapter. 567 // FIXME: How do we account for the request which might still be 568 // pending with us? 569 atomic_set(&adapter->being_detached, 1); 570 571 // detach from the IO sub-system 572 megaraid_io_detach(adapter); 573 574 // Unregister from common management module 575 // 576 // FIXME: this must return success or failure for conditions if there 577 // is a command pending with LLD or not. 578 megaraid_cmm_unregister(adapter); 579 580 // finalize the mailbox based controller and release all resources 581 megaraid_fini_mbox(adapter); 582 583 kfree(adapter); 584 585 scsi_host_put(host); 586 587 pci_disable_device(pdev); 588 589 return; 590 } 591 592 593 /** 594 * megaraid_mbox_shutdown - PCI shutdown for megaraid HBA 595 * @pdev : generic driver model device 596 * 597 * Shutdown notification, perform flush cache. 598 */ 599 static void 600 megaraid_mbox_shutdown(struct pci_dev *pdev) 601 { 602 adapter_t *adapter = pci_get_drvdata(pdev); 603 static int counter; 604 605 if (!adapter) { 606 con_log(CL_ANN, (KERN_WARNING 607 "megaraid: null device in shutdown\n")); 608 return; 609 } 610 611 // flush caches now 612 con_log(CL_ANN, (KERN_INFO "megaraid: flushing adapter %d...", 613 counter++)); 614 615 megaraid_mbox_flush_cache(adapter); 616 617 con_log(CL_ANN, ("done\n")); 618 } 619 620 621 /** 622 * megaraid_io_attach - attach a device with the IO subsystem 623 * @adapter : controller's soft state 624 * 625 * Attach this device with the IO subsystem. 626 */ 627 static int 628 megaraid_io_attach(adapter_t *adapter) 629 { 630 struct Scsi_Host *host; 631 632 // Initialize SCSI Host structure 633 host = scsi_host_alloc(&megaraid_template_g, 8); 634 if (!host) { 635 con_log(CL_ANN, (KERN_WARNING 636 "megaraid mbox: scsi_register failed\n")); 637 638 return -1; 639 } 640 641 SCSIHOST2ADAP(host) = (caddr_t)adapter; 642 adapter->host = host; 643 644 host->irq = adapter->irq; 645 host->unique_id = adapter->unique_id; 646 host->can_queue = adapter->max_cmds; 647 host->this_id = adapter->init_id; 648 host->sg_tablesize = adapter->sglen; 649 host->max_sectors = adapter->max_sectors; 650 host->cmd_per_lun = adapter->cmd_per_lun; 651 host->max_channel = adapter->max_channel; 652 host->max_id = adapter->max_target; 653 host->max_lun = adapter->max_lun; 654 655 656 // notify mid-layer about the new controller 657 if (scsi_add_host(host, &adapter->pdev->dev)) { 658 659 con_log(CL_ANN, (KERN_WARNING 660 "megaraid mbox: scsi_add_host failed\n")); 661 662 scsi_host_put(host); 663 664 return -1; 665 } 666 667 scsi_scan_host(host); 668 669 return 0; 670 } 671 672 673 /** 674 * megaraid_io_detach - detach a device from the IO subsystem 675 * @adapter : controller's soft state 676 * 677 * Detach this device from the IO subsystem. 678 */ 679 static void 680 megaraid_io_detach(adapter_t *adapter) 681 { 682 struct Scsi_Host *host; 683 684 con_log(CL_DLEVEL1, (KERN_INFO "megaraid: io detach\n")); 685 686 host = adapter->host; 687 688 scsi_remove_host(host); 689 690 return; 691 } 692 693 694 /* 695 * START: Mailbox Low Level Driver 696 * 697 * This is section specific to the single mailbox based controllers 698 */ 699 700 /** 701 * megaraid_init_mbox - initialize controller 702 * @adapter : our soft state 703 * 704 * - Allocate 16-byte aligned mailbox memory for firmware handshake 705 * - Allocate controller's memory resources 706 * - Find out all initialization data 707 * - Allocate memory required for all the commands 708 * - Use internal library of FW routines, build up complete soft state 709 */ 710 static int 711 megaraid_init_mbox(adapter_t *adapter) 712 { 713 struct pci_dev *pdev; 714 mraid_device_t *raid_dev; 715 int i; 716 uint32_t magic64; 717 718 719 adapter->ito = MBOX_TIMEOUT; 720 pdev = adapter->pdev; 721 722 /* 723 * Allocate and initialize the init data structure for mailbox 724 * controllers 725 */ 726 raid_dev = kzalloc(sizeof(mraid_device_t), GFP_KERNEL); 727 if (raid_dev == NULL) return -1; 728 729 730 /* 731 * Attach the adapter soft state to raid device soft state 732 */ 733 adapter->raid_device = (caddr_t)raid_dev; 734 raid_dev->fast_load = megaraid_fast_load; 735 736 737 // our baseport 738 raid_dev->baseport = pci_resource_start(pdev, 0); 739 740 if (pci_request_regions(pdev, "MegaRAID: LSI Logic Corporation") != 0) { 741 742 con_log(CL_ANN, (KERN_WARNING 743 "megaraid: mem region busy\n")); 744 745 goto out_free_raid_dev; 746 } 747 748 raid_dev->baseaddr = ioremap_nocache(raid_dev->baseport, 128); 749 750 if (!raid_dev->baseaddr) { 751 752 con_log(CL_ANN, (KERN_WARNING 753 "megaraid: could not map hba memory\n") ); 754 755 goto out_release_regions; 756 } 757 758 /* initialize the mutual exclusion lock for the mailbox */ 759 spin_lock_init(&raid_dev->mailbox_lock); 760 761 /* allocate memory required for commands */ 762 if (megaraid_alloc_cmd_packets(adapter) != 0) 763 goto out_iounmap; 764 765 /* 766 * Issue SYNC cmd to flush the pending cmds in the adapter 767 * and initialize its internal state 768 */ 769 770 if (megaraid_mbox_fire_sync_cmd(adapter)) 771 con_log(CL_ANN, ("megaraid: sync cmd failed\n")); 772 773 /* 774 * Setup the rest of the soft state using the library of 775 * FW routines 776 */ 777 778 /* request IRQ and register the interrupt service routine */ 779 if (request_irq(adapter->irq, megaraid_isr, IRQF_SHARED, "megaraid", 780 adapter)) { 781 782 con_log(CL_ANN, (KERN_WARNING 783 "megaraid: Couldn't register IRQ %d!\n", adapter->irq)); 784 goto out_alloc_cmds; 785 786 } 787 788 // Product info 789 if (megaraid_mbox_product_info(adapter) != 0) 790 goto out_free_irq; 791 792 // Do we support extended CDBs 793 adapter->max_cdb_sz = 10; 794 if (megaraid_mbox_extended_cdb(adapter) == 0) { 795 adapter->max_cdb_sz = 16; 796 } 797 798 /* 799 * Do we support cluster environment, if we do, what is the initiator 800 * id. 801 * NOTE: In a non-cluster aware firmware environment, the LLD should 802 * return 7 as initiator id. 803 */ 804 adapter->ha = 0; 805 adapter->init_id = -1; 806 if (megaraid_mbox_support_ha(adapter, &adapter->init_id) == 0) { 807 adapter->ha = 1; 808 } 809 810 /* 811 * Prepare the device ids array to have the mapping between the kernel 812 * device address and megaraid device address. 813 * We export the physical devices on their actual addresses. The 814 * logical drives are exported on a virtual SCSI channel 815 */ 816 megaraid_mbox_setup_device_map(adapter); 817 818 // If the firmware supports random deletion, update the device id map 819 if (megaraid_mbox_support_random_del(adapter)) { 820 821 // Change the logical drives numbers in device_ids array one 822 // slot in device_ids is reserved for target id, that's why 823 // "<=" below 824 for (i = 0; i <= MAX_LOGICAL_DRIVES_40LD; i++) { 825 adapter->device_ids[adapter->max_channel][i] += 0x80; 826 } 827 adapter->device_ids[adapter->max_channel][adapter->init_id] = 828 0xFF; 829 830 raid_dev->random_del_supported = 1; 831 } 832 833 /* 834 * find out the maximum number of scatter-gather elements supported by 835 * this firmware 836 */ 837 adapter->sglen = megaraid_mbox_get_max_sg(adapter); 838 839 // enumerate RAID and SCSI channels so that all devices on SCSI 840 // channels can later be exported, including disk devices 841 megaraid_mbox_enum_raid_scsi(adapter); 842 843 /* 844 * Other parameters required by upper layer 845 * 846 * maximum number of sectors per IO command 847 */ 848 adapter->max_sectors = megaraid_max_sectors; 849 850 /* 851 * number of queued commands per LUN. 852 */ 853 adapter->cmd_per_lun = megaraid_cmd_per_lun; 854 855 /* 856 * Allocate resources required to issue FW calls, when sysfs is 857 * accessed 858 */ 859 if (megaraid_sysfs_alloc_resources(adapter) != 0) 860 goto out_free_irq; 861 862 // Set the DMA mask to 64-bit. All supported controllers as capable of 863 // DMA in this range 864 pci_read_config_dword(adapter->pdev, PCI_CONF_AMISIG64, &magic64); 865 866 if (((magic64 == HBA_SIGNATURE_64_BIT) && 867 ((adapter->pdev->subsystem_device != 868 PCI_SUBSYS_ID_MEGARAID_SATA_150_6) && 869 (adapter->pdev->subsystem_device != 870 PCI_SUBSYS_ID_MEGARAID_SATA_150_4))) || 871 (adapter->pdev->vendor == PCI_VENDOR_ID_LSI_LOGIC && 872 adapter->pdev->device == PCI_DEVICE_ID_VERDE) || 873 (adapter->pdev->vendor == PCI_VENDOR_ID_LSI_LOGIC && 874 adapter->pdev->device == PCI_DEVICE_ID_DOBSON) || 875 (adapter->pdev->vendor == PCI_VENDOR_ID_LSI_LOGIC && 876 adapter->pdev->device == PCI_DEVICE_ID_LINDSAY) || 877 (adapter->pdev->vendor == PCI_VENDOR_ID_DELL && 878 adapter->pdev->device == PCI_DEVICE_ID_PERC4_DI_EVERGLADES) || 879 (adapter->pdev->vendor == PCI_VENDOR_ID_DELL && 880 adapter->pdev->device == PCI_DEVICE_ID_PERC4E_DI_KOBUK)) { 881 if (pci_set_dma_mask(adapter->pdev, DMA_BIT_MASK(64))) { 882 con_log(CL_ANN, (KERN_WARNING 883 "megaraid: DMA mask for 64-bit failed\n")); 884 885 if (pci_set_dma_mask (adapter->pdev, DMA_BIT_MASK(32))) { 886 con_log(CL_ANN, (KERN_WARNING 887 "megaraid: 32-bit DMA mask failed\n")); 888 goto out_free_sysfs_res; 889 } 890 } 891 } 892 893 // setup tasklet for DPC 894 tasklet_init(&adapter->dpc_h, megaraid_mbox_dpc, 895 (unsigned long)adapter); 896 897 con_log(CL_DLEVEL1, (KERN_INFO 898 "megaraid mbox hba successfully initialized\n")); 899 900 return 0; 901 902 out_free_sysfs_res: 903 megaraid_sysfs_free_resources(adapter); 904 out_free_irq: 905 free_irq(adapter->irq, adapter); 906 out_alloc_cmds: 907 megaraid_free_cmd_packets(adapter); 908 out_iounmap: 909 iounmap(raid_dev->baseaddr); 910 out_release_regions: 911 pci_release_regions(pdev); 912 out_free_raid_dev: 913 kfree(raid_dev); 914 915 return -1; 916 } 917 918 919 /** 920 * megaraid_fini_mbox - undo controller initialization 921 * @adapter : our soft state 922 */ 923 static void 924 megaraid_fini_mbox(adapter_t *adapter) 925 { 926 mraid_device_t *raid_dev = ADAP2RAIDDEV(adapter); 927 928 // flush all caches 929 megaraid_mbox_flush_cache(adapter); 930 931 tasklet_kill(&adapter->dpc_h); 932 933 megaraid_sysfs_free_resources(adapter); 934 935 megaraid_free_cmd_packets(adapter); 936 937 free_irq(adapter->irq, adapter); 938 939 iounmap(raid_dev->baseaddr); 940 941 pci_release_regions(adapter->pdev); 942 943 kfree(raid_dev); 944 945 return; 946 } 947 948 949 /** 950 * megaraid_alloc_cmd_packets - allocate shared mailbox 951 * @adapter : soft state of the raid controller 952 * 953 * Allocate and align the shared mailbox. This maibox is used to issue 954 * all the commands. For IO based controllers, the mailbox is also registered 955 * with the FW. Allocate memory for all commands as well. 956 * This is our big allocator. 957 */ 958 static int 959 megaraid_alloc_cmd_packets(adapter_t *adapter) 960 { 961 mraid_device_t *raid_dev = ADAP2RAIDDEV(adapter); 962 struct pci_dev *pdev; 963 unsigned long align; 964 scb_t *scb; 965 mbox_ccb_t *ccb; 966 struct mraid_pci_blk *epthru_pci_blk; 967 struct mraid_pci_blk *sg_pci_blk; 968 struct mraid_pci_blk *mbox_pci_blk; 969 int i; 970 971 pdev = adapter->pdev; 972 973 /* 974 * Setup the mailbox 975 * Allocate the common 16-byte aligned memory for the handshake 976 * mailbox. 977 */ 978 raid_dev->una_mbox64 = pci_zalloc_consistent(adapter->pdev, 979 sizeof(mbox64_t), 980 &raid_dev->una_mbox64_dma); 981 982 if (!raid_dev->una_mbox64) { 983 con_log(CL_ANN, (KERN_WARNING 984 "megaraid: out of memory, %s %d\n", __func__, 985 __LINE__)); 986 return -1; 987 } 988 989 /* 990 * Align the mailbox at 16-byte boundary 991 */ 992 raid_dev->mbox = &raid_dev->una_mbox64->mbox32; 993 994 raid_dev->mbox = (mbox_t *)((((unsigned long)raid_dev->mbox) + 15) & 995 (~0UL ^ 0xFUL)); 996 997 raid_dev->mbox64 = (mbox64_t *)(((unsigned long)raid_dev->mbox) - 8); 998 999 align = ((void *)raid_dev->mbox - 1000 ((void *)&raid_dev->una_mbox64->mbox32)); 1001 1002 raid_dev->mbox_dma = (unsigned long)raid_dev->una_mbox64_dma + 8 + 1003 align; 1004 1005 // Allocate memory for commands issued internally 1006 adapter->ibuf = pci_zalloc_consistent(pdev, MBOX_IBUF_SIZE, 1007 &adapter->ibuf_dma_h); 1008 if (!adapter->ibuf) { 1009 1010 con_log(CL_ANN, (KERN_WARNING 1011 "megaraid: out of memory, %s %d\n", __func__, 1012 __LINE__)); 1013 1014 goto out_free_common_mbox; 1015 } 1016 1017 // Allocate memory for our SCSI Command Blocks and their associated 1018 // memory 1019 1020 /* 1021 * Allocate memory for the base list of scb. Later allocate memory for 1022 * CCBs and embedded components of each CCB and point the pointers in 1023 * scb to the allocated components 1024 * NOTE: The code to allocate SCB will be duplicated in all the LLD 1025 * since the calling routine does not yet know the number of available 1026 * commands. 1027 */ 1028 adapter->kscb_list = kcalloc(MBOX_MAX_SCSI_CMDS, sizeof(scb_t), GFP_KERNEL); 1029 1030 if (adapter->kscb_list == NULL) { 1031 con_log(CL_ANN, (KERN_WARNING 1032 "megaraid: out of memory, %s %d\n", __func__, 1033 __LINE__)); 1034 goto out_free_ibuf; 1035 } 1036 1037 // memory allocation for our command packets 1038 if (megaraid_mbox_setup_dma_pools(adapter) != 0) { 1039 con_log(CL_ANN, (KERN_WARNING 1040 "megaraid: out of memory, %s %d\n", __func__, 1041 __LINE__)); 1042 goto out_free_scb_list; 1043 } 1044 1045 // Adjust the scb pointers and link in the free pool 1046 epthru_pci_blk = raid_dev->epthru_pool; 1047 sg_pci_blk = raid_dev->sg_pool; 1048 mbox_pci_blk = raid_dev->mbox_pool; 1049 1050 for (i = 0; i < MBOX_MAX_SCSI_CMDS; i++) { 1051 scb = adapter->kscb_list + i; 1052 ccb = raid_dev->ccb_list + i; 1053 1054 ccb->mbox = (mbox_t *)(mbox_pci_blk[i].vaddr + 16); 1055 ccb->raw_mbox = (uint8_t *)ccb->mbox; 1056 ccb->mbox64 = (mbox64_t *)(mbox_pci_blk[i].vaddr + 8); 1057 ccb->mbox_dma_h = (unsigned long)mbox_pci_blk[i].dma_addr + 16; 1058 1059 // make sure the mailbox is aligned properly 1060 if (ccb->mbox_dma_h & 0x0F) { 1061 con_log(CL_ANN, (KERN_CRIT 1062 "megaraid mbox: not aligned on 16-bytes\n")); 1063 1064 goto out_teardown_dma_pools; 1065 } 1066 1067 ccb->epthru = (mraid_epassthru_t *) 1068 epthru_pci_blk[i].vaddr; 1069 ccb->epthru_dma_h = epthru_pci_blk[i].dma_addr; 1070 ccb->pthru = (mraid_passthru_t *)ccb->epthru; 1071 ccb->pthru_dma_h = ccb->epthru_dma_h; 1072 1073 1074 ccb->sgl64 = (mbox_sgl64 *)sg_pci_blk[i].vaddr; 1075 ccb->sgl_dma_h = sg_pci_blk[i].dma_addr; 1076 ccb->sgl32 = (mbox_sgl32 *)ccb->sgl64; 1077 1078 scb->ccb = (caddr_t)ccb; 1079 scb->gp = 0; 1080 1081 scb->sno = i; // command index 1082 1083 scb->scp = NULL; 1084 scb->state = SCB_FREE; 1085 scb->dma_direction = PCI_DMA_NONE; 1086 scb->dma_type = MRAID_DMA_NONE; 1087 scb->dev_channel = -1; 1088 scb->dev_target = -1; 1089 1090 // put scb in the free pool 1091 list_add_tail(&scb->list, &adapter->kscb_pool); 1092 } 1093 1094 return 0; 1095 1096 out_teardown_dma_pools: 1097 megaraid_mbox_teardown_dma_pools(adapter); 1098 out_free_scb_list: 1099 kfree(adapter->kscb_list); 1100 out_free_ibuf: 1101 pci_free_consistent(pdev, MBOX_IBUF_SIZE, (void *)adapter->ibuf, 1102 adapter->ibuf_dma_h); 1103 out_free_common_mbox: 1104 pci_free_consistent(adapter->pdev, sizeof(mbox64_t), 1105 (caddr_t)raid_dev->una_mbox64, raid_dev->una_mbox64_dma); 1106 1107 return -1; 1108 } 1109 1110 1111 /** 1112 * megaraid_free_cmd_packets - free memory 1113 * @adapter : soft state of the raid controller 1114 * 1115 * Release memory resources allocated for commands. 1116 */ 1117 static void 1118 megaraid_free_cmd_packets(adapter_t *adapter) 1119 { 1120 mraid_device_t *raid_dev = ADAP2RAIDDEV(adapter); 1121 1122 megaraid_mbox_teardown_dma_pools(adapter); 1123 1124 kfree(adapter->kscb_list); 1125 1126 pci_free_consistent(adapter->pdev, MBOX_IBUF_SIZE, 1127 (void *)adapter->ibuf, adapter->ibuf_dma_h); 1128 1129 pci_free_consistent(adapter->pdev, sizeof(mbox64_t), 1130 (caddr_t)raid_dev->una_mbox64, raid_dev->una_mbox64_dma); 1131 return; 1132 } 1133 1134 1135 /** 1136 * megaraid_mbox_setup_dma_pools - setup dma pool for command packets 1137 * @adapter : HBA soft state 1138 * 1139 * Setup the dma pools for mailbox, passthru and extended passthru structures, 1140 * and scatter-gather lists. 1141 */ 1142 static int 1143 megaraid_mbox_setup_dma_pools(adapter_t *adapter) 1144 { 1145 mraid_device_t *raid_dev = ADAP2RAIDDEV(adapter); 1146 struct mraid_pci_blk *epthru_pci_blk; 1147 struct mraid_pci_blk *sg_pci_blk; 1148 struct mraid_pci_blk *mbox_pci_blk; 1149 int i; 1150 1151 1152 1153 // Allocate memory for 16-bytes aligned mailboxes 1154 raid_dev->mbox_pool_handle = dma_pool_create("megaraid mbox pool", 1155 &adapter->pdev->dev, 1156 sizeof(mbox64_t) + 16, 1157 16, 0); 1158 1159 if (raid_dev->mbox_pool_handle == NULL) { 1160 goto fail_setup_dma_pool; 1161 } 1162 1163 mbox_pci_blk = raid_dev->mbox_pool; 1164 for (i = 0; i < MBOX_MAX_SCSI_CMDS; i++) { 1165 mbox_pci_blk[i].vaddr = dma_pool_alloc( 1166 raid_dev->mbox_pool_handle, 1167 GFP_KERNEL, 1168 &mbox_pci_blk[i].dma_addr); 1169 if (!mbox_pci_blk[i].vaddr) { 1170 goto fail_setup_dma_pool; 1171 } 1172 } 1173 1174 /* 1175 * Allocate memory for each embedded passthru strucuture pointer 1176 * Request for a 128 bytes aligned structure for each passthru command 1177 * structure 1178 * Since passthru and extended passthru commands are exclusive, they 1179 * share common memory pool. Passthru structures piggyback on memory 1180 * allocted to extended passthru since passthru is smaller of the two 1181 */ 1182 raid_dev->epthru_pool_handle = dma_pool_create("megaraid mbox pthru", 1183 &adapter->pdev->dev, sizeof(mraid_epassthru_t), 128, 0); 1184 1185 if (raid_dev->epthru_pool_handle == NULL) { 1186 goto fail_setup_dma_pool; 1187 } 1188 1189 epthru_pci_blk = raid_dev->epthru_pool; 1190 for (i = 0; i < MBOX_MAX_SCSI_CMDS; i++) { 1191 epthru_pci_blk[i].vaddr = dma_pool_alloc( 1192 raid_dev->epthru_pool_handle, 1193 GFP_KERNEL, 1194 &epthru_pci_blk[i].dma_addr); 1195 if (!epthru_pci_blk[i].vaddr) { 1196 goto fail_setup_dma_pool; 1197 } 1198 } 1199 1200 1201 // Allocate memory for each scatter-gather list. Request for 512 bytes 1202 // alignment for each sg list 1203 raid_dev->sg_pool_handle = dma_pool_create("megaraid mbox sg", 1204 &adapter->pdev->dev, 1205 sizeof(mbox_sgl64) * MBOX_MAX_SG_SIZE, 1206 512, 0); 1207 1208 if (raid_dev->sg_pool_handle == NULL) { 1209 goto fail_setup_dma_pool; 1210 } 1211 1212 sg_pci_blk = raid_dev->sg_pool; 1213 for (i = 0; i < MBOX_MAX_SCSI_CMDS; i++) { 1214 sg_pci_blk[i].vaddr = dma_pool_alloc( 1215 raid_dev->sg_pool_handle, 1216 GFP_KERNEL, 1217 &sg_pci_blk[i].dma_addr); 1218 if (!sg_pci_blk[i].vaddr) { 1219 goto fail_setup_dma_pool; 1220 } 1221 } 1222 1223 return 0; 1224 1225 fail_setup_dma_pool: 1226 megaraid_mbox_teardown_dma_pools(adapter); 1227 return -1; 1228 } 1229 1230 1231 /** 1232 * megaraid_mbox_teardown_dma_pools - teardown dma pools for command packets 1233 * @adapter : HBA soft state 1234 * 1235 * Teardown the dma pool for mailbox, passthru and extended passthru 1236 * structures, and scatter-gather lists. 1237 */ 1238 static void 1239 megaraid_mbox_teardown_dma_pools(adapter_t *adapter) 1240 { 1241 mraid_device_t *raid_dev = ADAP2RAIDDEV(adapter); 1242 struct mraid_pci_blk *epthru_pci_blk; 1243 struct mraid_pci_blk *sg_pci_blk; 1244 struct mraid_pci_blk *mbox_pci_blk; 1245 int i; 1246 1247 1248 sg_pci_blk = raid_dev->sg_pool; 1249 for (i = 0; i < MBOX_MAX_SCSI_CMDS && sg_pci_blk[i].vaddr; i++) { 1250 dma_pool_free(raid_dev->sg_pool_handle, sg_pci_blk[i].vaddr, 1251 sg_pci_blk[i].dma_addr); 1252 } 1253 if (raid_dev->sg_pool_handle) 1254 dma_pool_destroy(raid_dev->sg_pool_handle); 1255 1256 1257 epthru_pci_blk = raid_dev->epthru_pool; 1258 for (i = 0; i < MBOX_MAX_SCSI_CMDS && epthru_pci_blk[i].vaddr; i++) { 1259 dma_pool_free(raid_dev->epthru_pool_handle, 1260 epthru_pci_blk[i].vaddr, epthru_pci_blk[i].dma_addr); 1261 } 1262 if (raid_dev->epthru_pool_handle) 1263 dma_pool_destroy(raid_dev->epthru_pool_handle); 1264 1265 1266 mbox_pci_blk = raid_dev->mbox_pool; 1267 for (i = 0; i < MBOX_MAX_SCSI_CMDS && mbox_pci_blk[i].vaddr; i++) { 1268 dma_pool_free(raid_dev->mbox_pool_handle, 1269 mbox_pci_blk[i].vaddr, mbox_pci_blk[i].dma_addr); 1270 } 1271 if (raid_dev->mbox_pool_handle) 1272 dma_pool_destroy(raid_dev->mbox_pool_handle); 1273 1274 return; 1275 } 1276 1277 1278 /** 1279 * megaraid_alloc_scb - detach and return a scb from the free list 1280 * @adapter : controller's soft state 1281 * @scp : pointer to the scsi command to be executed 1282 * 1283 * Return the scb from the head of the free list. %NULL if there are none 1284 * available. 1285 */ 1286 static scb_t * 1287 megaraid_alloc_scb(adapter_t *adapter, struct scsi_cmnd *scp) 1288 { 1289 struct list_head *head = &adapter->kscb_pool; 1290 scb_t *scb = NULL; 1291 unsigned long flags; 1292 1293 // detach scb from free pool 1294 spin_lock_irqsave(SCSI_FREE_LIST_LOCK(adapter), flags); 1295 1296 if (list_empty(head)) { 1297 spin_unlock_irqrestore(SCSI_FREE_LIST_LOCK(adapter), flags); 1298 return NULL; 1299 } 1300 1301 scb = list_entry(head->next, scb_t, list); 1302 list_del_init(&scb->list); 1303 1304 spin_unlock_irqrestore(SCSI_FREE_LIST_LOCK(adapter), flags); 1305 1306 scb->state = SCB_ACTIVE; 1307 scb->scp = scp; 1308 scb->dma_type = MRAID_DMA_NONE; 1309 1310 return scb; 1311 } 1312 1313 1314 /** 1315 * megaraid_dealloc_scb - return the scb to the free pool 1316 * @adapter : controller's soft state 1317 * @scb : scb to be freed 1318 * 1319 * Return the scb back to the free list of scbs. The caller must 'flush' the 1320 * SCB before calling us. E.g., performing pci_unamp and/or pci_sync etc. 1321 * NOTE NOTE: Make sure the scb is not on any list before calling this 1322 * routine. 1323 */ 1324 static inline void 1325 megaraid_dealloc_scb(adapter_t *adapter, scb_t *scb) 1326 { 1327 unsigned long flags; 1328 1329 // put scb in the free pool 1330 scb->state = SCB_FREE; 1331 scb->scp = NULL; 1332 spin_lock_irqsave(SCSI_FREE_LIST_LOCK(adapter), flags); 1333 1334 list_add(&scb->list, &adapter->kscb_pool); 1335 1336 spin_unlock_irqrestore(SCSI_FREE_LIST_LOCK(adapter), flags); 1337 1338 return; 1339 } 1340 1341 1342 /** 1343 * megaraid_mbox_mksgl - make the scatter-gather list 1344 * @adapter : controller's soft state 1345 * @scb : scsi control block 1346 * 1347 * Prepare the scatter-gather list. 1348 */ 1349 static int 1350 megaraid_mbox_mksgl(adapter_t *adapter, scb_t *scb) 1351 { 1352 struct scatterlist *sgl; 1353 mbox_ccb_t *ccb; 1354 struct scsi_cmnd *scp; 1355 int sgcnt; 1356 int i; 1357 1358 1359 scp = scb->scp; 1360 ccb = (mbox_ccb_t *)scb->ccb; 1361 1362 sgcnt = scsi_dma_map(scp); 1363 BUG_ON(sgcnt < 0 || sgcnt > adapter->sglen); 1364 1365 // no mapping required if no data to be transferred 1366 if (!sgcnt) 1367 return 0; 1368 1369 scb->dma_type = MRAID_DMA_WSG; 1370 1371 scsi_for_each_sg(scp, sgl, sgcnt, i) { 1372 ccb->sgl64[i].address = sg_dma_address(sgl); 1373 ccb->sgl64[i].length = sg_dma_len(sgl); 1374 } 1375 1376 // Return count of SG nodes 1377 return sgcnt; 1378 } 1379 1380 1381 /** 1382 * mbox_post_cmd - issue a mailbox command 1383 * @adapter : controller's soft state 1384 * @scb : command to be issued 1385 * 1386 * Post the command to the controller if mailbox is available. 1387 */ 1388 static int 1389 mbox_post_cmd(adapter_t *adapter, scb_t *scb) 1390 { 1391 mraid_device_t *raid_dev = ADAP2RAIDDEV(adapter); 1392 mbox64_t *mbox64; 1393 mbox_t *mbox; 1394 mbox_ccb_t *ccb; 1395 unsigned long flags; 1396 unsigned int i = 0; 1397 1398 1399 ccb = (mbox_ccb_t *)scb->ccb; 1400 mbox = raid_dev->mbox; 1401 mbox64 = raid_dev->mbox64; 1402 1403 /* 1404 * Check for busy mailbox. If it is, return failure - the caller 1405 * should retry later. 1406 */ 1407 spin_lock_irqsave(MAILBOX_LOCK(raid_dev), flags); 1408 1409 if (unlikely(mbox->busy)) { 1410 do { 1411 udelay(1); 1412 i++; 1413 rmb(); 1414 } while(mbox->busy && (i < max_mbox_busy_wait)); 1415 1416 if (mbox->busy) { 1417 1418 spin_unlock_irqrestore(MAILBOX_LOCK(raid_dev), flags); 1419 1420 return -1; 1421 } 1422 } 1423 1424 1425 // Copy this command's mailbox data into "adapter's" mailbox 1426 memcpy((caddr_t)mbox64, (caddr_t)ccb->mbox64, 22); 1427 mbox->cmdid = scb->sno; 1428 1429 adapter->outstanding_cmds++; 1430 1431 if (scb->dma_direction == PCI_DMA_TODEVICE) 1432 pci_dma_sync_sg_for_device(adapter->pdev, 1433 scsi_sglist(scb->scp), 1434 scsi_sg_count(scb->scp), 1435 PCI_DMA_TODEVICE); 1436 1437 mbox->busy = 1; // Set busy 1438 mbox->poll = 0; 1439 mbox->ack = 0; 1440 wmb(); 1441 1442 WRINDOOR(raid_dev, raid_dev->mbox_dma | 0x1); 1443 1444 spin_unlock_irqrestore(MAILBOX_LOCK(raid_dev), flags); 1445 1446 return 0; 1447 } 1448 1449 1450 /** 1451 * megaraid_queue_command - generic queue entry point for all LLDs 1452 * @scp : pointer to the scsi command to be executed 1453 * @done : callback routine to be called after the cmd has be completed 1454 * 1455 * Queue entry point for mailbox based controllers. 1456 */ 1457 static int 1458 megaraid_queue_command_lck(struct scsi_cmnd *scp, void (*done)(struct scsi_cmnd *)) 1459 { 1460 adapter_t *adapter; 1461 scb_t *scb; 1462 int if_busy; 1463 1464 adapter = SCP2ADAPTER(scp); 1465 scp->scsi_done = done; 1466 scp->result = 0; 1467 1468 /* 1469 * Allocate and build a SCB request 1470 * if_busy flag will be set if megaraid_mbox_build_cmd() command could 1471 * not allocate scb. We will return non-zero status in that case. 1472 * NOTE: scb can be null even though certain commands completed 1473 * successfully, e.g., MODE_SENSE and TEST_UNIT_READY, it would 1474 * return 0 in that case, and we would do the callback right away. 1475 */ 1476 if_busy = 0; 1477 scb = megaraid_mbox_build_cmd(adapter, scp, &if_busy); 1478 if (!scb) { // command already completed 1479 done(scp); 1480 return 0; 1481 } 1482 1483 megaraid_mbox_runpendq(adapter, scb); 1484 return if_busy; 1485 } 1486 1487 static DEF_SCSI_QCMD(megaraid_queue_command) 1488 1489 /** 1490 * megaraid_mbox_build_cmd - transform the mid-layer scsi commands 1491 * @adapter : controller's soft state 1492 * @scp : mid-layer scsi command pointer 1493 * @busy : set if request could not be completed because of lack of 1494 * resources 1495 * 1496 * Transform the mid-layer scsi command to megaraid firmware lingua. 1497 * Convert the command issued by mid-layer to format understood by megaraid 1498 * firmware. We also complete certain commands without sending them to firmware. 1499 */ 1500 static scb_t * 1501 megaraid_mbox_build_cmd(adapter_t *adapter, struct scsi_cmnd *scp, int *busy) 1502 { 1503 mraid_device_t *rdev = ADAP2RAIDDEV(adapter); 1504 int channel; 1505 int target; 1506 int islogical; 1507 mbox_ccb_t *ccb; 1508 mraid_passthru_t *pthru; 1509 mbox64_t *mbox64; 1510 mbox_t *mbox; 1511 scb_t *scb; 1512 char skip[] = "skipping"; 1513 char scan[] = "scanning"; 1514 char *ss; 1515 1516 1517 /* 1518 * Get the appropriate device map for the device this command is 1519 * intended for 1520 */ 1521 MRAID_GET_DEVICE_MAP(adapter, scp, channel, target, islogical); 1522 1523 /* 1524 * Logical drive commands 1525 */ 1526 if (islogical) { 1527 switch (scp->cmnd[0]) { 1528 case TEST_UNIT_READY: 1529 /* 1530 * Do we support clustering and is the support enabled 1531 * If no, return success always 1532 */ 1533 if (!adapter->ha) { 1534 scp->result = (DID_OK << 16); 1535 return NULL; 1536 } 1537 1538 if (!(scb = megaraid_alloc_scb(adapter, scp))) { 1539 scp->result = (DID_ERROR << 16); 1540 *busy = 1; 1541 return NULL; 1542 } 1543 1544 scb->dma_direction = scp->sc_data_direction; 1545 scb->dev_channel = 0xFF; 1546 scb->dev_target = target; 1547 ccb = (mbox_ccb_t *)scb->ccb; 1548 1549 /* 1550 * The command id will be provided by the command 1551 * issuance routine 1552 */ 1553 ccb->raw_mbox[0] = CLUSTER_CMD; 1554 ccb->raw_mbox[2] = RESERVATION_STATUS; 1555 ccb->raw_mbox[3] = target; 1556 1557 return scb; 1558 1559 case MODE_SENSE: 1560 { 1561 struct scatterlist *sgl; 1562 caddr_t vaddr; 1563 1564 sgl = scsi_sglist(scp); 1565 if (sg_page(sgl)) { 1566 vaddr = (caddr_t) sg_virt(&sgl[0]); 1567 1568 memset(vaddr, 0, scp->cmnd[4]); 1569 } 1570 else { 1571 con_log(CL_ANN, (KERN_WARNING 1572 "megaraid mailbox: invalid sg:%d\n", 1573 __LINE__)); 1574 } 1575 } 1576 scp->result = (DID_OK << 16); 1577 return NULL; 1578 1579 case INQUIRY: 1580 /* 1581 * Display the channel scan for logical drives 1582 * Do not display scan for a channel if already done. 1583 */ 1584 if (!(rdev->last_disp & (1L << SCP2CHANNEL(scp)))) { 1585 1586 con_log(CL_ANN, (KERN_INFO 1587 "scsi[%d]: scanning scsi channel %d", 1588 adapter->host->host_no, 1589 SCP2CHANNEL(scp))); 1590 1591 con_log(CL_ANN, ( 1592 " [virtual] for logical drives\n")); 1593 1594 rdev->last_disp |= (1L << SCP2CHANNEL(scp)); 1595 } 1596 1597 if (scp->cmnd[1] & MEGA_SCSI_INQ_EVPD) { 1598 scp->sense_buffer[0] = 0x70; 1599 scp->sense_buffer[2] = ILLEGAL_REQUEST; 1600 scp->sense_buffer[12] = MEGA_INVALID_FIELD_IN_CDB; 1601 scp->result = CHECK_CONDITION << 1; 1602 return NULL; 1603 } 1604 1605 /* Fall through */ 1606 1607 case READ_CAPACITY: 1608 /* 1609 * Do not allow LUN > 0 for logical drives and 1610 * requests for more than 40 logical drives 1611 */ 1612 if (SCP2LUN(scp)) { 1613 scp->result = (DID_BAD_TARGET << 16); 1614 return NULL; 1615 } 1616 if ((target % 0x80) >= MAX_LOGICAL_DRIVES_40LD) { 1617 scp->result = (DID_BAD_TARGET << 16); 1618 return NULL; 1619 } 1620 1621 1622 /* Allocate a SCB and initialize passthru */ 1623 if (!(scb = megaraid_alloc_scb(adapter, scp))) { 1624 scp->result = (DID_ERROR << 16); 1625 *busy = 1; 1626 return NULL; 1627 } 1628 1629 ccb = (mbox_ccb_t *)scb->ccb; 1630 scb->dev_channel = 0xFF; 1631 scb->dev_target = target; 1632 pthru = ccb->pthru; 1633 mbox = ccb->mbox; 1634 mbox64 = ccb->mbox64; 1635 1636 pthru->timeout = 0; 1637 pthru->ars = 1; 1638 pthru->reqsenselen = 14; 1639 pthru->islogical = 1; 1640 pthru->logdrv = target; 1641 pthru->cdblen = scp->cmd_len; 1642 memcpy(pthru->cdb, scp->cmnd, scp->cmd_len); 1643 1644 mbox->cmd = MBOXCMD_PASSTHRU64; 1645 scb->dma_direction = scp->sc_data_direction; 1646 1647 pthru->dataxferlen = scsi_bufflen(scp); 1648 pthru->dataxferaddr = ccb->sgl_dma_h; 1649 pthru->numsge = megaraid_mbox_mksgl(adapter, 1650 scb); 1651 1652 mbox->xferaddr = 0xFFFFFFFF; 1653 mbox64->xferaddr_lo = (uint32_t )ccb->pthru_dma_h; 1654 mbox64->xferaddr_hi = 0; 1655 1656 return scb; 1657 1658 case READ_6: 1659 case WRITE_6: 1660 case READ_10: 1661 case WRITE_10: 1662 case READ_12: 1663 case WRITE_12: 1664 1665 /* 1666 * Allocate a SCB and initialize mailbox 1667 */ 1668 if (!(scb = megaraid_alloc_scb(adapter, scp))) { 1669 scp->result = (DID_ERROR << 16); 1670 *busy = 1; 1671 return NULL; 1672 } 1673 ccb = (mbox_ccb_t *)scb->ccb; 1674 scb->dev_channel = 0xFF; 1675 scb->dev_target = target; 1676 mbox = ccb->mbox; 1677 mbox64 = ccb->mbox64; 1678 mbox->logdrv = target; 1679 1680 /* 1681 * A little HACK: 2nd bit is zero for all scsi read 1682 * commands and is set for all scsi write commands 1683 */ 1684 mbox->cmd = (scp->cmnd[0] & 0x02) ? MBOXCMD_LWRITE64: 1685 MBOXCMD_LREAD64 ; 1686 1687 /* 1688 * 6-byte READ(0x08) or WRITE(0x0A) cdb 1689 */ 1690 if (scp->cmd_len == 6) { 1691 mbox->numsectors = (uint32_t)scp->cmnd[4]; 1692 mbox->lba = 1693 ((uint32_t)scp->cmnd[1] << 16) | 1694 ((uint32_t)scp->cmnd[2] << 8) | 1695 (uint32_t)scp->cmnd[3]; 1696 1697 mbox->lba &= 0x1FFFFF; 1698 } 1699 1700 /* 1701 * 10-byte READ(0x28) or WRITE(0x2A) cdb 1702 */ 1703 else if (scp->cmd_len == 10) { 1704 mbox->numsectors = 1705 (uint32_t)scp->cmnd[8] | 1706 ((uint32_t)scp->cmnd[7] << 8); 1707 mbox->lba = 1708 ((uint32_t)scp->cmnd[2] << 24) | 1709 ((uint32_t)scp->cmnd[3] << 16) | 1710 ((uint32_t)scp->cmnd[4] << 8) | 1711 (uint32_t)scp->cmnd[5]; 1712 } 1713 1714 /* 1715 * 12-byte READ(0xA8) or WRITE(0xAA) cdb 1716 */ 1717 else if (scp->cmd_len == 12) { 1718 mbox->lba = 1719 ((uint32_t)scp->cmnd[2] << 24) | 1720 ((uint32_t)scp->cmnd[3] << 16) | 1721 ((uint32_t)scp->cmnd[4] << 8) | 1722 (uint32_t)scp->cmnd[5]; 1723 1724 mbox->numsectors = 1725 ((uint32_t)scp->cmnd[6] << 24) | 1726 ((uint32_t)scp->cmnd[7] << 16) | 1727 ((uint32_t)scp->cmnd[8] << 8) | 1728 (uint32_t)scp->cmnd[9]; 1729 } 1730 else { 1731 con_log(CL_ANN, (KERN_WARNING 1732 "megaraid: unsupported CDB length\n")); 1733 1734 megaraid_dealloc_scb(adapter, scb); 1735 1736 scp->result = (DID_ERROR << 16); 1737 return NULL; 1738 } 1739 1740 scb->dma_direction = scp->sc_data_direction; 1741 1742 // Calculate Scatter-Gather info 1743 mbox64->xferaddr_lo = (uint32_t )ccb->sgl_dma_h; 1744 mbox->numsge = megaraid_mbox_mksgl(adapter, 1745 scb); 1746 mbox->xferaddr = 0xFFFFFFFF; 1747 mbox64->xferaddr_hi = 0; 1748 1749 return scb; 1750 1751 case RESERVE: 1752 case RELEASE: 1753 /* 1754 * Do we support clustering and is the support enabled 1755 */ 1756 if (!adapter->ha) { 1757 scp->result = (DID_BAD_TARGET << 16); 1758 return NULL; 1759 } 1760 1761 /* 1762 * Allocate a SCB and initialize mailbox 1763 */ 1764 if (!(scb = megaraid_alloc_scb(adapter, scp))) { 1765 scp->result = (DID_ERROR << 16); 1766 *busy = 1; 1767 return NULL; 1768 } 1769 1770 ccb = (mbox_ccb_t *)scb->ccb; 1771 scb->dev_channel = 0xFF; 1772 scb->dev_target = target; 1773 ccb->raw_mbox[0] = CLUSTER_CMD; 1774 ccb->raw_mbox[2] = (scp->cmnd[0] == RESERVE) ? 1775 RESERVE_LD : RELEASE_LD; 1776 1777 ccb->raw_mbox[3] = target; 1778 scb->dma_direction = scp->sc_data_direction; 1779 1780 return scb; 1781 1782 default: 1783 scp->result = (DID_BAD_TARGET << 16); 1784 return NULL; 1785 } 1786 } 1787 else { // Passthru device commands 1788 1789 // Do not allow access to target id > 15 or LUN > 7 1790 if (target > 15 || SCP2LUN(scp) > 7) { 1791 scp->result = (DID_BAD_TARGET << 16); 1792 return NULL; 1793 } 1794 1795 // if fast load option was set and scan for last device is 1796 // over, reset the fast_load flag so that during a possible 1797 // next scan, devices can be made available 1798 if (rdev->fast_load && (target == 15) && 1799 (SCP2CHANNEL(scp) == adapter->max_channel -1)) { 1800 1801 con_log(CL_ANN, (KERN_INFO 1802 "megaraid[%d]: physical device scan re-enabled\n", 1803 adapter->host->host_no)); 1804 rdev->fast_load = 0; 1805 } 1806 1807 /* 1808 * Display the channel scan for physical devices 1809 */ 1810 if (!(rdev->last_disp & (1L << SCP2CHANNEL(scp)))) { 1811 1812 ss = rdev->fast_load ? skip : scan; 1813 1814 con_log(CL_ANN, (KERN_INFO 1815 "scsi[%d]: %s scsi channel %d [Phy %d]", 1816 adapter->host->host_no, ss, SCP2CHANNEL(scp), 1817 channel)); 1818 1819 con_log(CL_ANN, ( 1820 " for non-raid devices\n")); 1821 1822 rdev->last_disp |= (1L << SCP2CHANNEL(scp)); 1823 } 1824 1825 // disable channel sweep if fast load option given 1826 if (rdev->fast_load) { 1827 scp->result = (DID_BAD_TARGET << 16); 1828 return NULL; 1829 } 1830 1831 // Allocate a SCB and initialize passthru 1832 if (!(scb = megaraid_alloc_scb(adapter, scp))) { 1833 scp->result = (DID_ERROR << 16); 1834 *busy = 1; 1835 return NULL; 1836 } 1837 1838 ccb = (mbox_ccb_t *)scb->ccb; 1839 scb->dev_channel = channel; 1840 scb->dev_target = target; 1841 scb->dma_direction = scp->sc_data_direction; 1842 mbox = ccb->mbox; 1843 mbox64 = ccb->mbox64; 1844 1845 // Does this firmware support extended CDBs 1846 if (adapter->max_cdb_sz == 16) { 1847 mbox->cmd = MBOXCMD_EXTPTHRU; 1848 1849 megaraid_mbox_prepare_epthru(adapter, scb, scp); 1850 1851 mbox64->xferaddr_lo = (uint32_t)ccb->epthru_dma_h; 1852 mbox64->xferaddr_hi = 0; 1853 mbox->xferaddr = 0xFFFFFFFF; 1854 } 1855 else { 1856 mbox->cmd = MBOXCMD_PASSTHRU64; 1857 1858 megaraid_mbox_prepare_pthru(adapter, scb, scp); 1859 1860 mbox64->xferaddr_lo = (uint32_t)ccb->pthru_dma_h; 1861 mbox64->xferaddr_hi = 0; 1862 mbox->xferaddr = 0xFFFFFFFF; 1863 } 1864 return scb; 1865 } 1866 1867 // NOT REACHED 1868 } 1869 1870 1871 /** 1872 * megaraid_mbox_runpendq - execute commands queued in the pending queue 1873 * @adapter : controller's soft state 1874 * @scb_q : SCB to be queued in the pending list 1875 * 1876 * Scan the pending list for commands which are not yet issued and try to 1877 * post to the controller. The SCB can be a null pointer, which would indicate 1878 * no SCB to be queue, just try to execute the ones in the pending list. 1879 * 1880 * NOTE: We do not actually traverse the pending list. The SCBs are plucked 1881 * out from the head of the pending list. If it is successfully issued, the 1882 * next SCB is at the head now. 1883 */ 1884 static void 1885 megaraid_mbox_runpendq(adapter_t *adapter, scb_t *scb_q) 1886 { 1887 scb_t *scb; 1888 unsigned long flags; 1889 1890 spin_lock_irqsave(PENDING_LIST_LOCK(adapter), flags); 1891 1892 if (scb_q) { 1893 scb_q->state = SCB_PENDQ; 1894 list_add_tail(&scb_q->list, &adapter->pend_list); 1895 } 1896 1897 // if the adapter in not in quiescent mode, post the commands to FW 1898 if (adapter->quiescent) { 1899 spin_unlock_irqrestore(PENDING_LIST_LOCK(adapter), flags); 1900 return; 1901 } 1902 1903 while (!list_empty(&adapter->pend_list)) { 1904 1905 assert_spin_locked(PENDING_LIST_LOCK(adapter)); 1906 1907 scb = list_entry(adapter->pend_list.next, scb_t, list); 1908 1909 // remove the scb from the pending list and try to 1910 // issue. If we are unable to issue it, put back in 1911 // the pending list and return 1912 1913 list_del_init(&scb->list); 1914 1915 spin_unlock_irqrestore(PENDING_LIST_LOCK(adapter), flags); 1916 1917 // if mailbox was busy, return SCB back to pending 1918 // list. Make sure to add at the head, since that's 1919 // where it would have been removed from 1920 1921 scb->state = SCB_ISSUED; 1922 1923 if (mbox_post_cmd(adapter, scb) != 0) { 1924 1925 spin_lock_irqsave(PENDING_LIST_LOCK(adapter), flags); 1926 1927 scb->state = SCB_PENDQ; 1928 1929 list_add(&scb->list, &adapter->pend_list); 1930 1931 spin_unlock_irqrestore(PENDING_LIST_LOCK(adapter), 1932 flags); 1933 1934 return; 1935 } 1936 1937 spin_lock_irqsave(PENDING_LIST_LOCK(adapter), flags); 1938 } 1939 1940 spin_unlock_irqrestore(PENDING_LIST_LOCK(adapter), flags); 1941 1942 1943 return; 1944 } 1945 1946 1947 /** 1948 * megaraid_mbox_prepare_pthru - prepare a command for physical devices 1949 * @adapter : pointer to controller's soft state 1950 * @scb : scsi control block 1951 * @scp : scsi command from the mid-layer 1952 * 1953 * Prepare a command for the scsi physical devices. 1954 */ 1955 static void 1956 megaraid_mbox_prepare_pthru(adapter_t *adapter, scb_t *scb, 1957 struct scsi_cmnd *scp) 1958 { 1959 mbox_ccb_t *ccb; 1960 mraid_passthru_t *pthru; 1961 uint8_t channel; 1962 uint8_t target; 1963 1964 ccb = (mbox_ccb_t *)scb->ccb; 1965 pthru = ccb->pthru; 1966 channel = scb->dev_channel; 1967 target = scb->dev_target; 1968 1969 // 0=6sec, 1=60sec, 2=10min, 3=3hrs, 4=NO timeout 1970 pthru->timeout = 4; 1971 pthru->ars = 1; 1972 pthru->islogical = 0; 1973 pthru->channel = 0; 1974 pthru->target = (channel << 4) | target; 1975 pthru->logdrv = SCP2LUN(scp); 1976 pthru->reqsenselen = 14; 1977 pthru->cdblen = scp->cmd_len; 1978 1979 memcpy(pthru->cdb, scp->cmnd, scp->cmd_len); 1980 1981 if (scsi_bufflen(scp)) { 1982 pthru->dataxferlen = scsi_bufflen(scp); 1983 pthru->dataxferaddr = ccb->sgl_dma_h; 1984 pthru->numsge = megaraid_mbox_mksgl(adapter, scb); 1985 } 1986 else { 1987 pthru->dataxferaddr = 0; 1988 pthru->dataxferlen = 0; 1989 pthru->numsge = 0; 1990 } 1991 return; 1992 } 1993 1994 1995 /** 1996 * megaraid_mbox_prepare_epthru - prepare a command for physical devices 1997 * @adapter : pointer to controller's soft state 1998 * @scb : scsi control block 1999 * @scp : scsi command from the mid-layer 2000 * 2001 * Prepare a command for the scsi physical devices. This routine prepares 2002 * commands for devices which can take extended CDBs (>10 bytes). 2003 */ 2004 static void 2005 megaraid_mbox_prepare_epthru(adapter_t *adapter, scb_t *scb, 2006 struct scsi_cmnd *scp) 2007 { 2008 mbox_ccb_t *ccb; 2009 mraid_epassthru_t *epthru; 2010 uint8_t channel; 2011 uint8_t target; 2012 2013 ccb = (mbox_ccb_t *)scb->ccb; 2014 epthru = ccb->epthru; 2015 channel = scb->dev_channel; 2016 target = scb->dev_target; 2017 2018 // 0=6sec, 1=60sec, 2=10min, 3=3hrs, 4=NO timeout 2019 epthru->timeout = 4; 2020 epthru->ars = 1; 2021 epthru->islogical = 0; 2022 epthru->channel = 0; 2023 epthru->target = (channel << 4) | target; 2024 epthru->logdrv = SCP2LUN(scp); 2025 epthru->reqsenselen = 14; 2026 epthru->cdblen = scp->cmd_len; 2027 2028 memcpy(epthru->cdb, scp->cmnd, scp->cmd_len); 2029 2030 if (scsi_bufflen(scp)) { 2031 epthru->dataxferlen = scsi_bufflen(scp); 2032 epthru->dataxferaddr = ccb->sgl_dma_h; 2033 epthru->numsge = megaraid_mbox_mksgl(adapter, scb); 2034 } 2035 else { 2036 epthru->dataxferaddr = 0; 2037 epthru->dataxferlen = 0; 2038 epthru->numsge = 0; 2039 } 2040 return; 2041 } 2042 2043 2044 /** 2045 * megaraid_ack_sequence - interrupt ack sequence for memory mapped HBAs 2046 * @adapter : controller's soft state 2047 * 2048 * Interrupt acknowledgement sequence for memory mapped HBAs. Find out the 2049 * completed command and put them on the completed list for later processing. 2050 * 2051 * Returns: 1 if the interrupt is valid, 0 otherwise 2052 */ 2053 static int 2054 megaraid_ack_sequence(adapter_t *adapter) 2055 { 2056 mraid_device_t *raid_dev = ADAP2RAIDDEV(adapter); 2057 mbox_t *mbox; 2058 scb_t *scb; 2059 uint8_t nstatus; 2060 uint8_t completed[MBOX_MAX_FIRMWARE_STATUS]; 2061 struct list_head clist; 2062 int handled; 2063 uint32_t dword; 2064 unsigned long flags; 2065 int i, j; 2066 2067 2068 mbox = raid_dev->mbox; 2069 2070 // move the SCBs from the firmware completed array to our local list 2071 INIT_LIST_HEAD(&clist); 2072 2073 // loop till F/W has more commands for us to complete 2074 handled = 0; 2075 spin_lock_irqsave(MAILBOX_LOCK(raid_dev), flags); 2076 do { 2077 /* 2078 * Check if a valid interrupt is pending. If found, force the 2079 * interrupt line low. 2080 */ 2081 dword = RDOUTDOOR(raid_dev); 2082 if (dword != 0x10001234) break; 2083 2084 handled = 1; 2085 2086 WROUTDOOR(raid_dev, 0x10001234); 2087 2088 nstatus = 0; 2089 // wait for valid numstatus to post 2090 for (i = 0; i < 0xFFFFF; i++) { 2091 if (mbox->numstatus != 0xFF) { 2092 nstatus = mbox->numstatus; 2093 break; 2094 } 2095 rmb(); 2096 } 2097 mbox->numstatus = 0xFF; 2098 2099 adapter->outstanding_cmds -= nstatus; 2100 2101 for (i = 0; i < nstatus; i++) { 2102 2103 // wait for valid command index to post 2104 for (j = 0; j < 0xFFFFF; j++) { 2105 if (mbox->completed[i] != 0xFF) break; 2106 rmb(); 2107 } 2108 completed[i] = mbox->completed[i]; 2109 mbox->completed[i] = 0xFF; 2110 2111 if (completed[i] == 0xFF) { 2112 con_log(CL_ANN, (KERN_CRIT 2113 "megaraid: command posting timed out\n")); 2114 2115 BUG(); 2116 continue; 2117 } 2118 2119 // Get SCB associated with this command id 2120 if (completed[i] >= MBOX_MAX_SCSI_CMDS) { 2121 // a cmm command 2122 scb = adapter->uscb_list + (completed[i] - 2123 MBOX_MAX_SCSI_CMDS); 2124 } 2125 else { 2126 // an os command 2127 scb = adapter->kscb_list + completed[i]; 2128 } 2129 2130 scb->status = mbox->status; 2131 list_add_tail(&scb->list, &clist); 2132 } 2133 2134 // Acknowledge interrupt 2135 WRINDOOR(raid_dev, 0x02); 2136 2137 } while(1); 2138 2139 spin_unlock_irqrestore(MAILBOX_LOCK(raid_dev), flags); 2140 2141 2142 // put the completed commands in the completed list. DPC would 2143 // complete these commands later 2144 spin_lock_irqsave(COMPLETED_LIST_LOCK(adapter), flags); 2145 2146 list_splice(&clist, &adapter->completed_list); 2147 2148 spin_unlock_irqrestore(COMPLETED_LIST_LOCK(adapter), flags); 2149 2150 2151 // schedule the DPC if there is some work for it 2152 if (handled) 2153 tasklet_schedule(&adapter->dpc_h); 2154 2155 return handled; 2156 } 2157 2158 2159 /** 2160 * megaraid_isr - isr for memory based mailbox based controllers 2161 * @irq : irq 2162 * @devp : pointer to our soft state 2163 * 2164 * Interrupt service routine for memory-mapped mailbox controllers. 2165 */ 2166 static irqreturn_t 2167 megaraid_isr(int irq, void *devp) 2168 { 2169 adapter_t *adapter = devp; 2170 int handled; 2171 2172 handled = megaraid_ack_sequence(adapter); 2173 2174 /* Loop through any pending requests */ 2175 if (!adapter->quiescent) { 2176 megaraid_mbox_runpendq(adapter, NULL); 2177 } 2178 2179 return IRQ_RETVAL(handled); 2180 } 2181 2182 2183 /** 2184 * megaraid_mbox_sync_scb - sync kernel buffers 2185 * @adapter : controller's soft state 2186 * @scb : pointer to the resource packet 2187 * 2188 * DMA sync if required. 2189 */ 2190 static void 2191 megaraid_mbox_sync_scb(adapter_t *adapter, scb_t *scb) 2192 { 2193 mbox_ccb_t *ccb; 2194 2195 ccb = (mbox_ccb_t *)scb->ccb; 2196 2197 if (scb->dma_direction == PCI_DMA_FROMDEVICE) 2198 pci_dma_sync_sg_for_cpu(adapter->pdev, 2199 scsi_sglist(scb->scp), 2200 scsi_sg_count(scb->scp), 2201 PCI_DMA_FROMDEVICE); 2202 2203 scsi_dma_unmap(scb->scp); 2204 return; 2205 } 2206 2207 2208 /** 2209 * megaraid_mbox_dpc - the tasklet to complete the commands from completed list 2210 * @devp : pointer to HBA soft state 2211 * 2212 * Pick up the commands from the completed list and send back to the owners. 2213 * This is a reentrant function and does not assume any locks are held while 2214 * it is being called. 2215 */ 2216 static void 2217 megaraid_mbox_dpc(unsigned long devp) 2218 { 2219 adapter_t *adapter = (adapter_t *)devp; 2220 mraid_device_t *raid_dev; 2221 struct list_head clist; 2222 struct scatterlist *sgl; 2223 scb_t *scb; 2224 scb_t *tmp; 2225 struct scsi_cmnd *scp; 2226 mraid_passthru_t *pthru; 2227 mraid_epassthru_t *epthru; 2228 mbox_ccb_t *ccb; 2229 int islogical; 2230 int pdev_index; 2231 int pdev_state; 2232 mbox_t *mbox; 2233 unsigned long flags; 2234 uint8_t c; 2235 int status; 2236 uioc_t *kioc; 2237 2238 2239 if (!adapter) return; 2240 2241 raid_dev = ADAP2RAIDDEV(adapter); 2242 2243 // move the SCBs from the completed list to our local list 2244 INIT_LIST_HEAD(&clist); 2245 2246 spin_lock_irqsave(COMPLETED_LIST_LOCK(adapter), flags); 2247 2248 list_splice_init(&adapter->completed_list, &clist); 2249 2250 spin_unlock_irqrestore(COMPLETED_LIST_LOCK(adapter), flags); 2251 2252 2253 list_for_each_entry_safe(scb, tmp, &clist, list) { 2254 2255 status = scb->status; 2256 scp = scb->scp; 2257 ccb = (mbox_ccb_t *)scb->ccb; 2258 pthru = ccb->pthru; 2259 epthru = ccb->epthru; 2260 mbox = ccb->mbox; 2261 2262 // Make sure f/w has completed a valid command 2263 if (scb->state != SCB_ISSUED) { 2264 con_log(CL_ANN, (KERN_CRIT 2265 "megaraid critical err: invalid command %d:%d:%p\n", 2266 scb->sno, scb->state, scp)); 2267 BUG(); 2268 continue; // Must never happen! 2269 } 2270 2271 // check for the management command and complete it right away 2272 if (scb->sno >= MBOX_MAX_SCSI_CMDS) { 2273 scb->state = SCB_FREE; 2274 scb->status = status; 2275 2276 // remove from local clist 2277 list_del_init(&scb->list); 2278 2279 kioc = (uioc_t *)scb->gp; 2280 kioc->status = 0; 2281 2282 megaraid_mbox_mm_done(adapter, scb); 2283 2284 continue; 2285 } 2286 2287 // Was an abort issued for this command earlier 2288 if (scb->state & SCB_ABORT) { 2289 con_log(CL_ANN, (KERN_NOTICE 2290 "megaraid: aborted cmd [%x] completed\n", 2291 scb->sno)); 2292 } 2293 2294 /* 2295 * If the inquiry came of a disk drive which is not part of 2296 * any RAID array, expose it to the kernel. For this to be 2297 * enabled, user must set the "megaraid_expose_unconf_disks" 2298 * flag to 1 by specifying it on module parameter list. 2299 * This would enable data migration off drives from other 2300 * configurations. 2301 */ 2302 islogical = MRAID_IS_LOGICAL(adapter, scp); 2303 if (scp->cmnd[0] == INQUIRY && status == 0 && islogical == 0 2304 && IS_RAID_CH(raid_dev, scb->dev_channel)) { 2305 2306 sgl = scsi_sglist(scp); 2307 if (sg_page(sgl)) { 2308 c = *(unsigned char *) sg_virt(&sgl[0]); 2309 } else { 2310 con_log(CL_ANN, (KERN_WARNING 2311 "megaraid mailbox: invalid sg:%d\n", 2312 __LINE__)); 2313 c = 0; 2314 } 2315 2316 if ((c & 0x1F ) == TYPE_DISK) { 2317 pdev_index = (scb->dev_channel * 16) + 2318 scb->dev_target; 2319 pdev_state = 2320 raid_dev->pdrv_state[pdev_index] & 0x0F; 2321 2322 if (pdev_state == PDRV_ONLINE || 2323 pdev_state == PDRV_FAILED || 2324 pdev_state == PDRV_RBLD || 2325 pdev_state == PDRV_HOTSPARE || 2326 megaraid_expose_unconf_disks == 0) { 2327 2328 status = 0xF0; 2329 } 2330 } 2331 } 2332 2333 // Convert MegaRAID status to Linux error code 2334 switch (status) { 2335 2336 case 0x00: 2337 2338 scp->result = (DID_OK << 16); 2339 break; 2340 2341 case 0x02: 2342 2343 /* set sense_buffer and result fields */ 2344 if (mbox->cmd == MBOXCMD_PASSTHRU || 2345 mbox->cmd == MBOXCMD_PASSTHRU64) { 2346 2347 memcpy(scp->sense_buffer, pthru->reqsensearea, 2348 14); 2349 2350 scp->result = DRIVER_SENSE << 24 | 2351 DID_OK << 16 | CHECK_CONDITION << 1; 2352 } 2353 else { 2354 if (mbox->cmd == MBOXCMD_EXTPTHRU) { 2355 2356 memcpy(scp->sense_buffer, 2357 epthru->reqsensearea, 14); 2358 2359 scp->result = DRIVER_SENSE << 24 | 2360 DID_OK << 16 | 2361 CHECK_CONDITION << 1; 2362 } else { 2363 scp->sense_buffer[0] = 0x70; 2364 scp->sense_buffer[2] = ABORTED_COMMAND; 2365 scp->result = CHECK_CONDITION << 1; 2366 } 2367 } 2368 break; 2369 2370 case 0x08: 2371 2372 scp->result = DID_BUS_BUSY << 16 | status; 2373 break; 2374 2375 default: 2376 2377 /* 2378 * If TEST_UNIT_READY fails, we know RESERVATION_STATUS 2379 * failed 2380 */ 2381 if (scp->cmnd[0] == TEST_UNIT_READY) { 2382 scp->result = DID_ERROR << 16 | 2383 RESERVATION_CONFLICT << 1; 2384 } 2385 else 2386 /* 2387 * Error code returned is 1 if Reserve or Release 2388 * failed or the input parameter is invalid 2389 */ 2390 if (status == 1 && (scp->cmnd[0] == RESERVE || 2391 scp->cmnd[0] == RELEASE)) { 2392 2393 scp->result = DID_ERROR << 16 | 2394 RESERVATION_CONFLICT << 1; 2395 } 2396 else { 2397 scp->result = DID_BAD_TARGET << 16 | status; 2398 } 2399 } 2400 2401 // print a debug message for all failed commands 2402 if (status) { 2403 megaraid_mbox_display_scb(adapter, scb); 2404 } 2405 2406 // Free our internal resources and call the mid-layer callback 2407 // routine 2408 megaraid_mbox_sync_scb(adapter, scb); 2409 2410 // remove from local clist 2411 list_del_init(&scb->list); 2412 2413 // put back in free list 2414 megaraid_dealloc_scb(adapter, scb); 2415 2416 // send the scsi packet back to kernel 2417 scp->scsi_done(scp); 2418 } 2419 2420 return; 2421 } 2422 2423 2424 /** 2425 * megaraid_abort_handler - abort the scsi command 2426 * @scp : command to be aborted 2427 * 2428 * Abort a previous SCSI request. Only commands on the pending list can be 2429 * aborted. All the commands issued to the F/W must complete. 2430 **/ 2431 static int 2432 megaraid_abort_handler(struct scsi_cmnd *scp) 2433 { 2434 adapter_t *adapter; 2435 mraid_device_t *raid_dev; 2436 scb_t *scb; 2437 scb_t *tmp; 2438 int found; 2439 unsigned long flags; 2440 int i; 2441 2442 2443 adapter = SCP2ADAPTER(scp); 2444 raid_dev = ADAP2RAIDDEV(adapter); 2445 2446 con_log(CL_ANN, (KERN_WARNING 2447 "megaraid: aborting cmd=%x <c=%d t=%d l=%d>\n", 2448 scp->cmnd[0], SCP2CHANNEL(scp), 2449 SCP2TARGET(scp), SCP2LUN(scp))); 2450 2451 // If FW has stopped responding, simply return failure 2452 if (raid_dev->hw_error) { 2453 con_log(CL_ANN, (KERN_NOTICE 2454 "megaraid: hw error, not aborting\n")); 2455 return FAILED; 2456 } 2457 2458 // There might a race here, where the command was completed by the 2459 // firmware and now it is on the completed list. Before we could 2460 // complete the command to the kernel in dpc, the abort came. 2461 // Find out if this is the case to avoid the race. 2462 scb = NULL; 2463 spin_lock_irqsave(COMPLETED_LIST_LOCK(adapter), flags); 2464 list_for_each_entry_safe(scb, tmp, &adapter->completed_list, list) { 2465 2466 if (scb->scp == scp) { // Found command 2467 2468 list_del_init(&scb->list); // from completed list 2469 2470 con_log(CL_ANN, (KERN_WARNING 2471 "megaraid: %d[%d:%d], abort from completed list\n", 2472 scb->sno, scb->dev_channel, scb->dev_target)); 2473 2474 scp->result = (DID_ABORT << 16); 2475 scp->scsi_done(scp); 2476 2477 megaraid_dealloc_scb(adapter, scb); 2478 2479 spin_unlock_irqrestore(COMPLETED_LIST_LOCK(adapter), 2480 flags); 2481 2482 return SUCCESS; 2483 } 2484 } 2485 spin_unlock_irqrestore(COMPLETED_LIST_LOCK(adapter), flags); 2486 2487 2488 // Find out if this command is still on the pending list. If it is and 2489 // was never issued, abort and return success. If the command is owned 2490 // by the firmware, we must wait for it to complete by the FW. 2491 spin_lock_irqsave(PENDING_LIST_LOCK(adapter), flags); 2492 list_for_each_entry_safe(scb, tmp, &adapter->pend_list, list) { 2493 2494 if (scb->scp == scp) { // Found command 2495 2496 list_del_init(&scb->list); // from pending list 2497 2498 ASSERT(!(scb->state & SCB_ISSUED)); 2499 2500 con_log(CL_ANN, (KERN_WARNING 2501 "megaraid abort: [%d:%d], driver owner\n", 2502 scb->dev_channel, scb->dev_target)); 2503 2504 scp->result = (DID_ABORT << 16); 2505 scp->scsi_done(scp); 2506 2507 megaraid_dealloc_scb(adapter, scb); 2508 2509 spin_unlock_irqrestore(PENDING_LIST_LOCK(adapter), 2510 flags); 2511 2512 return SUCCESS; 2513 } 2514 } 2515 spin_unlock_irqrestore(PENDING_LIST_LOCK(adapter), flags); 2516 2517 2518 // Check do we even own this command, in which case this would be 2519 // owned by the firmware. The only way to locate the FW scb is to 2520 // traverse through the list of all SCB, since driver does not 2521 // maintain these SCBs on any list 2522 found = 0; 2523 spin_lock_irq(&adapter->lock); 2524 for (i = 0; i < MBOX_MAX_SCSI_CMDS; i++) { 2525 scb = adapter->kscb_list + i; 2526 2527 if (scb->scp == scp) { 2528 2529 found = 1; 2530 2531 if (!(scb->state & SCB_ISSUED)) { 2532 con_log(CL_ANN, (KERN_WARNING 2533 "megaraid abort: %d[%d:%d], invalid state\n", 2534 scb->sno, scb->dev_channel, scb->dev_target)); 2535 BUG(); 2536 } 2537 else { 2538 con_log(CL_ANN, (KERN_WARNING 2539 "megaraid abort: %d[%d:%d], fw owner\n", 2540 scb->sno, scb->dev_channel, scb->dev_target)); 2541 } 2542 } 2543 } 2544 spin_unlock_irq(&adapter->lock); 2545 2546 if (!found) { 2547 con_log(CL_ANN, (KERN_WARNING "megaraid abort: do now own\n")); 2548 2549 // FIXME: Should there be a callback for this command? 2550 return SUCCESS; 2551 } 2552 2553 // We cannot actually abort a command owned by firmware, return 2554 // failure and wait for reset. In host reset handler, we will find out 2555 // if the HBA is still live 2556 return FAILED; 2557 } 2558 2559 /** 2560 * megaraid_reset_handler - device reset handler for mailbox based driver 2561 * @scp : reference command 2562 * 2563 * Reset handler for the mailbox based controller. First try to find out if 2564 * the FW is still live, in which case the outstanding commands counter mut go 2565 * down to 0. If that happens, also issue the reservation reset command to 2566 * relinquish (possible) reservations on the logical drives connected to this 2567 * host. 2568 **/ 2569 static int 2570 megaraid_reset_handler(struct scsi_cmnd *scp) 2571 { 2572 adapter_t *adapter; 2573 scb_t *scb; 2574 scb_t *tmp; 2575 mraid_device_t *raid_dev; 2576 unsigned long flags; 2577 uint8_t raw_mbox[sizeof(mbox_t)]; 2578 int rval; 2579 int recovery_window; 2580 int recovering; 2581 int i; 2582 uioc_t *kioc; 2583 2584 adapter = SCP2ADAPTER(scp); 2585 raid_dev = ADAP2RAIDDEV(adapter); 2586 2587 // return failure if adapter is not responding 2588 if (raid_dev->hw_error) { 2589 con_log(CL_ANN, (KERN_NOTICE 2590 "megaraid: hw error, cannot reset\n")); 2591 return FAILED; 2592 } 2593 2594 2595 // Under exceptional conditions, FW can take up to 3 minutes to 2596 // complete command processing. Wait for additional 2 minutes for the 2597 // pending commands counter to go down to 0. If it doesn't, let the 2598 // controller be marked offline 2599 // Also, reset all the commands currently owned by the driver 2600 spin_lock_irqsave(PENDING_LIST_LOCK(adapter), flags); 2601 list_for_each_entry_safe(scb, tmp, &adapter->pend_list, list) { 2602 list_del_init(&scb->list); // from pending list 2603 2604 if (scb->sno >= MBOX_MAX_SCSI_CMDS) { 2605 con_log(CL_ANN, (KERN_WARNING 2606 "megaraid: IOCTL packet with %d[%d:%d] being reset\n", 2607 scb->sno, scb->dev_channel, scb->dev_target)); 2608 2609 scb->status = -1; 2610 2611 kioc = (uioc_t *)scb->gp; 2612 kioc->status = -EFAULT; 2613 2614 megaraid_mbox_mm_done(adapter, scb); 2615 } else { 2616 if (scb->scp == scp) { // Found command 2617 con_log(CL_ANN, (KERN_WARNING 2618 "megaraid: %d[%d:%d], reset from pending list\n", 2619 scb->sno, scb->dev_channel, scb->dev_target)); 2620 } else { 2621 con_log(CL_ANN, (KERN_WARNING 2622 "megaraid: IO packet with %d[%d:%d] being reset\n", 2623 scb->sno, scb->dev_channel, scb->dev_target)); 2624 } 2625 2626 scb->scp->result = (DID_RESET << 16); 2627 scb->scp->scsi_done(scb->scp); 2628 2629 megaraid_dealloc_scb(adapter, scb); 2630 } 2631 } 2632 spin_unlock_irqrestore(PENDING_LIST_LOCK(adapter), flags); 2633 2634 if (adapter->outstanding_cmds) { 2635 con_log(CL_ANN, (KERN_NOTICE 2636 "megaraid: %d outstanding commands. Max wait %d sec\n", 2637 adapter->outstanding_cmds, 2638 (MBOX_RESET_WAIT + MBOX_RESET_EXT_WAIT))); 2639 } 2640 2641 recovery_window = MBOX_RESET_WAIT + MBOX_RESET_EXT_WAIT; 2642 2643 recovering = adapter->outstanding_cmds; 2644 2645 for (i = 0; i < recovery_window; i++) { 2646 2647 megaraid_ack_sequence(adapter); 2648 2649 // print a message once every 5 seconds only 2650 if (!(i % 5)) { 2651 con_log(CL_ANN, ( 2652 "megaraid mbox: Wait for %d commands to complete:%d\n", 2653 adapter->outstanding_cmds, 2654 (MBOX_RESET_WAIT + MBOX_RESET_EXT_WAIT) - i)); 2655 } 2656 2657 // bailout if no recovery happened in reset time 2658 if (adapter->outstanding_cmds == 0) { 2659 break; 2660 } 2661 2662 msleep(1000); 2663 } 2664 2665 spin_lock(&adapter->lock); 2666 2667 // If still outstanding commands, bail out 2668 if (adapter->outstanding_cmds) { 2669 con_log(CL_ANN, (KERN_WARNING 2670 "megaraid mbox: critical hardware error!\n")); 2671 2672 raid_dev->hw_error = 1; 2673 2674 rval = FAILED; 2675 goto out; 2676 } 2677 else { 2678 con_log(CL_ANN, (KERN_NOTICE 2679 "megaraid mbox: reset sequence completed successfully\n")); 2680 } 2681 2682 2683 // If the controller supports clustering, reset reservations 2684 if (!adapter->ha) { 2685 rval = SUCCESS; 2686 goto out; 2687 } 2688 2689 // clear reservations if any 2690 raw_mbox[0] = CLUSTER_CMD; 2691 raw_mbox[2] = RESET_RESERVATIONS; 2692 2693 rval = SUCCESS; 2694 if (mbox_post_sync_cmd_fast(adapter, raw_mbox) == 0) { 2695 con_log(CL_ANN, 2696 (KERN_INFO "megaraid: reservation reset\n")); 2697 } 2698 else { 2699 rval = FAILED; 2700 con_log(CL_ANN, (KERN_WARNING 2701 "megaraid: reservation reset failed\n")); 2702 } 2703 2704 out: 2705 spin_unlock(&adapter->lock); 2706 return rval; 2707 } 2708 2709 /* 2710 * START: internal commands library 2711 * 2712 * This section of the driver has the common routine used by the driver and 2713 * also has all the FW routines 2714 */ 2715 2716 /** 2717 * mbox_post_sync_cmd() - blocking command to the mailbox based controllers 2718 * @adapter : controller's soft state 2719 * @raw_mbox : the mailbox 2720 * 2721 * Issue a scb in synchronous and non-interrupt mode for mailbox based 2722 * controllers. 2723 */ 2724 static int 2725 mbox_post_sync_cmd(adapter_t *adapter, uint8_t raw_mbox[]) 2726 { 2727 mraid_device_t *raid_dev = ADAP2RAIDDEV(adapter); 2728 mbox64_t *mbox64; 2729 mbox_t *mbox; 2730 uint8_t status; 2731 int i; 2732 2733 2734 mbox64 = raid_dev->mbox64; 2735 mbox = raid_dev->mbox; 2736 2737 /* 2738 * Wait until mailbox is free 2739 */ 2740 if (megaraid_busywait_mbox(raid_dev) != 0) 2741 goto blocked_mailbox; 2742 2743 /* 2744 * Copy mailbox data into host structure 2745 */ 2746 memcpy((caddr_t)mbox, (caddr_t)raw_mbox, 16); 2747 mbox->cmdid = 0xFE; 2748 mbox->busy = 1; 2749 mbox->poll = 0; 2750 mbox->ack = 0; 2751 mbox->numstatus = 0xFF; 2752 mbox->status = 0xFF; 2753 2754 wmb(); 2755 WRINDOOR(raid_dev, raid_dev->mbox_dma | 0x1); 2756 2757 // wait for maximum 1 second for status to post. If the status is not 2758 // available within 1 second, assume FW is initializing and wait 2759 // for an extended amount of time 2760 if (mbox->numstatus == 0xFF) { // status not yet available 2761 udelay(25); 2762 2763 for (i = 0; mbox->numstatus == 0xFF && i < 1000; i++) { 2764 rmb(); 2765 msleep(1); 2766 } 2767 2768 2769 if (i == 1000) { 2770 con_log(CL_ANN, (KERN_NOTICE 2771 "megaraid mailbox: wait for FW to boot ")); 2772 2773 for (i = 0; (mbox->numstatus == 0xFF) && 2774 (i < MBOX_RESET_WAIT); i++) { 2775 rmb(); 2776 con_log(CL_ANN, ("\b\b\b\b\b[%03d]", 2777 MBOX_RESET_WAIT - i)); 2778 msleep(1000); 2779 } 2780 2781 if (i == MBOX_RESET_WAIT) { 2782 2783 con_log(CL_ANN, ( 2784 "\nmegaraid mailbox: status not available\n")); 2785 2786 return -1; 2787 } 2788 con_log(CL_ANN, ("\b\b\b\b\b[ok] \n")); 2789 } 2790 } 2791 2792 // wait for maximum 1 second for poll semaphore 2793 if (mbox->poll != 0x77) { 2794 udelay(25); 2795 2796 for (i = 0; (mbox->poll != 0x77) && (i < 1000); i++) { 2797 rmb(); 2798 msleep(1); 2799 } 2800 2801 if (i == 1000) { 2802 con_log(CL_ANN, (KERN_WARNING 2803 "megaraid mailbox: could not get poll semaphore\n")); 2804 return -1; 2805 } 2806 } 2807 2808 WRINDOOR(raid_dev, raid_dev->mbox_dma | 0x2); 2809 wmb(); 2810 2811 // wait for maximum 1 second for acknowledgement 2812 if (RDINDOOR(raid_dev) & 0x2) { 2813 udelay(25); 2814 2815 for (i = 0; (RDINDOOR(raid_dev) & 0x2) && (i < 1000); i++) { 2816 rmb(); 2817 msleep(1); 2818 } 2819 2820 if (i == 1000) { 2821 con_log(CL_ANN, (KERN_WARNING 2822 "megaraid mailbox: could not acknowledge\n")); 2823 return -1; 2824 } 2825 } 2826 mbox->poll = 0; 2827 mbox->ack = 0x77; 2828 2829 status = mbox->status; 2830 2831 // invalidate the completed command id array. After command 2832 // completion, firmware would write the valid id. 2833 mbox->numstatus = 0xFF; 2834 mbox->status = 0xFF; 2835 for (i = 0; i < MBOX_MAX_FIRMWARE_STATUS; i++) { 2836 mbox->completed[i] = 0xFF; 2837 } 2838 2839 return status; 2840 2841 blocked_mailbox: 2842 2843 con_log(CL_ANN, (KERN_WARNING "megaraid: blocked mailbox\n") ); 2844 return -1; 2845 } 2846 2847 2848 /** 2849 * mbox_post_sync_cmd_fast - blocking command to the mailbox based controllers 2850 * @adapter : controller's soft state 2851 * @raw_mbox : the mailbox 2852 * 2853 * Issue a scb in synchronous and non-interrupt mode for mailbox based 2854 * controllers. This is a faster version of the synchronous command and 2855 * therefore can be called in interrupt-context as well. 2856 */ 2857 static int 2858 mbox_post_sync_cmd_fast(adapter_t *adapter, uint8_t raw_mbox[]) 2859 { 2860 mraid_device_t *raid_dev = ADAP2RAIDDEV(adapter); 2861 mbox_t *mbox; 2862 long i; 2863 2864 2865 mbox = raid_dev->mbox; 2866 2867 // return immediately if the mailbox is busy 2868 if (mbox->busy) return -1; 2869 2870 // Copy mailbox data into host structure 2871 memcpy((caddr_t)mbox, (caddr_t)raw_mbox, 14); 2872 mbox->cmdid = 0xFE; 2873 mbox->busy = 1; 2874 mbox->poll = 0; 2875 mbox->ack = 0; 2876 mbox->numstatus = 0xFF; 2877 mbox->status = 0xFF; 2878 2879 wmb(); 2880 WRINDOOR(raid_dev, raid_dev->mbox_dma | 0x1); 2881 2882 for (i = 0; i < MBOX_SYNC_WAIT_CNT; i++) { 2883 if (mbox->numstatus != 0xFF) break; 2884 rmb(); 2885 udelay(MBOX_SYNC_DELAY_200); 2886 } 2887 2888 if (i == MBOX_SYNC_WAIT_CNT) { 2889 // We may need to re-calibrate the counter 2890 con_log(CL_ANN, (KERN_CRIT 2891 "megaraid: fast sync command timed out\n")); 2892 } 2893 2894 WRINDOOR(raid_dev, raid_dev->mbox_dma | 0x2); 2895 wmb(); 2896 2897 return mbox->status; 2898 } 2899 2900 2901 /** 2902 * megaraid_busywait_mbox() - Wait until the controller's mailbox is available 2903 * @raid_dev : RAID device (HBA) soft state 2904 * 2905 * Wait until the controller's mailbox is available to accept more commands. 2906 * Wait for at most 1 second. 2907 */ 2908 static int 2909 megaraid_busywait_mbox(mraid_device_t *raid_dev) 2910 { 2911 mbox_t *mbox = raid_dev->mbox; 2912 int i = 0; 2913 2914 if (mbox->busy) { 2915 udelay(25); 2916 for (i = 0; mbox->busy && i < 1000; i++) 2917 msleep(1); 2918 } 2919 2920 if (i < 1000) return 0; 2921 else return -1; 2922 } 2923 2924 2925 /** 2926 * megaraid_mbox_product_info - some static information about the controller 2927 * @adapter : our soft state 2928 * 2929 * Issue commands to the controller to grab some parameters required by our 2930 * caller. 2931 */ 2932 static int 2933 megaraid_mbox_product_info(adapter_t *adapter) 2934 { 2935 mraid_device_t *raid_dev = ADAP2RAIDDEV(adapter); 2936 mbox_t *mbox; 2937 uint8_t raw_mbox[sizeof(mbox_t)]; 2938 mraid_pinfo_t *pinfo; 2939 dma_addr_t pinfo_dma_h; 2940 mraid_inquiry3_t *mraid_inq3; 2941 int i; 2942 2943 2944 memset((caddr_t)raw_mbox, 0, sizeof(raw_mbox)); 2945 mbox = (mbox_t *)raw_mbox; 2946 2947 /* 2948 * Issue an ENQUIRY3 command to find out certain adapter parameters, 2949 * e.g., max channels, max commands etc. 2950 */ 2951 pinfo = pci_zalloc_consistent(adapter->pdev, sizeof(mraid_pinfo_t), 2952 &pinfo_dma_h); 2953 2954 if (pinfo == NULL) { 2955 con_log(CL_ANN, (KERN_WARNING 2956 "megaraid: out of memory, %s %d\n", __func__, 2957 __LINE__)); 2958 2959 return -1; 2960 } 2961 2962 mbox->xferaddr = (uint32_t)adapter->ibuf_dma_h; 2963 memset((void *)adapter->ibuf, 0, MBOX_IBUF_SIZE); 2964 2965 raw_mbox[0] = FC_NEW_CONFIG; 2966 raw_mbox[2] = NC_SUBOP_ENQUIRY3; 2967 raw_mbox[3] = ENQ3_GET_SOLICITED_FULL; 2968 2969 // Issue the command 2970 if (mbox_post_sync_cmd(adapter, raw_mbox) != 0) { 2971 2972 con_log(CL_ANN, (KERN_WARNING "megaraid: Inquiry3 failed\n")); 2973 2974 pci_free_consistent(adapter->pdev, sizeof(mraid_pinfo_t), 2975 pinfo, pinfo_dma_h); 2976 2977 return -1; 2978 } 2979 2980 /* 2981 * Collect information about state of each physical drive 2982 * attached to the controller. We will expose all the disks 2983 * which are not part of RAID 2984 */ 2985 mraid_inq3 = (mraid_inquiry3_t *)adapter->ibuf; 2986 for (i = 0; i < MBOX_MAX_PHYSICAL_DRIVES; i++) { 2987 raid_dev->pdrv_state[i] = mraid_inq3->pdrv_state[i]; 2988 } 2989 2990 /* 2991 * Get product info for information like number of channels, 2992 * maximum commands supported. 2993 */ 2994 memset((caddr_t)raw_mbox, 0, sizeof(raw_mbox)); 2995 mbox->xferaddr = (uint32_t)pinfo_dma_h; 2996 2997 raw_mbox[0] = FC_NEW_CONFIG; 2998 raw_mbox[2] = NC_SUBOP_PRODUCT_INFO; 2999 3000 if (mbox_post_sync_cmd(adapter, raw_mbox) != 0) { 3001 3002 con_log(CL_ANN, (KERN_WARNING 3003 "megaraid: product info failed\n")); 3004 3005 pci_free_consistent(adapter->pdev, sizeof(mraid_pinfo_t), 3006 pinfo, pinfo_dma_h); 3007 3008 return -1; 3009 } 3010 3011 /* 3012 * Setup some parameters for host, as required by our caller 3013 */ 3014 adapter->max_channel = pinfo->nchannels; 3015 3016 /* 3017 * we will export all the logical drives on a single channel. 3018 * Add 1 since inquires do not come for inititor ID 3019 */ 3020 adapter->max_target = MAX_LOGICAL_DRIVES_40LD + 1; 3021 adapter->max_lun = 8; // up to 8 LUNs for non-disk devices 3022 3023 /* 3024 * These are the maximum outstanding commands for the scsi-layer 3025 */ 3026 adapter->max_cmds = MBOX_MAX_SCSI_CMDS; 3027 3028 memset(adapter->fw_version, 0, VERSION_SIZE); 3029 memset(adapter->bios_version, 0, VERSION_SIZE); 3030 3031 memcpy(adapter->fw_version, pinfo->fw_version, 4); 3032 adapter->fw_version[4] = 0; 3033 3034 memcpy(adapter->bios_version, pinfo->bios_version, 4); 3035 adapter->bios_version[4] = 0; 3036 3037 con_log(CL_ANN, (KERN_NOTICE 3038 "megaraid: fw version:[%s] bios version:[%s]\n", 3039 adapter->fw_version, adapter->bios_version)); 3040 3041 pci_free_consistent(adapter->pdev, sizeof(mraid_pinfo_t), pinfo, 3042 pinfo_dma_h); 3043 3044 return 0; 3045 } 3046 3047 3048 3049 /** 3050 * megaraid_mbox_extended_cdb - check for support for extended CDBs 3051 * @adapter : soft state for the controller 3052 * 3053 * This routine check whether the controller in question supports extended 3054 * ( > 10 bytes ) CDBs. 3055 */ 3056 static int 3057 megaraid_mbox_extended_cdb(adapter_t *adapter) 3058 { 3059 mbox_t *mbox; 3060 uint8_t raw_mbox[sizeof(mbox_t)]; 3061 int rval; 3062 3063 mbox = (mbox_t *)raw_mbox; 3064 3065 memset((caddr_t)raw_mbox, 0, sizeof(raw_mbox)); 3066 mbox->xferaddr = (uint32_t)adapter->ibuf_dma_h; 3067 3068 memset((void *)adapter->ibuf, 0, MBOX_IBUF_SIZE); 3069 3070 raw_mbox[0] = MAIN_MISC_OPCODE; 3071 raw_mbox[2] = SUPPORT_EXT_CDB; 3072 3073 /* 3074 * Issue the command 3075 */ 3076 rval = 0; 3077 if (mbox_post_sync_cmd(adapter, raw_mbox) != 0) { 3078 rval = -1; 3079 } 3080 3081 return rval; 3082 } 3083 3084 3085 /** 3086 * megaraid_mbox_support_ha - Do we support clustering 3087 * @adapter : soft state for the controller 3088 * @init_id : ID of the initiator 3089 * 3090 * Determine if the firmware supports clustering and the ID of the initiator. 3091 */ 3092 static int 3093 megaraid_mbox_support_ha(adapter_t *adapter, uint16_t *init_id) 3094 { 3095 mbox_t *mbox; 3096 uint8_t raw_mbox[sizeof(mbox_t)]; 3097 int rval; 3098 3099 3100 mbox = (mbox_t *)raw_mbox; 3101 3102 memset((caddr_t)raw_mbox, 0, sizeof(raw_mbox)); 3103 3104 mbox->xferaddr = (uint32_t)adapter->ibuf_dma_h; 3105 3106 memset((void *)adapter->ibuf, 0, MBOX_IBUF_SIZE); 3107 3108 raw_mbox[0] = GET_TARGET_ID; 3109 3110 // Issue the command 3111 *init_id = 7; 3112 rval = -1; 3113 if (mbox_post_sync_cmd(adapter, raw_mbox) == 0) { 3114 3115 *init_id = *(uint8_t *)adapter->ibuf; 3116 3117 con_log(CL_ANN, (KERN_INFO 3118 "megaraid: cluster firmware, initiator ID: %d\n", 3119 *init_id)); 3120 3121 rval = 0; 3122 } 3123 3124 return rval; 3125 } 3126 3127 3128 /** 3129 * megaraid_mbox_support_random_del - Do we support random deletion 3130 * @adapter : soft state for the controller 3131 * 3132 * Determine if the firmware supports random deletion. 3133 * Return: 1 is operation supported, 0 otherwise 3134 */ 3135 static int 3136 megaraid_mbox_support_random_del(adapter_t *adapter) 3137 { 3138 mbox_t *mbox; 3139 uint8_t raw_mbox[sizeof(mbox_t)]; 3140 int rval; 3141 3142 /* 3143 * Newer firmware on Dell CERC expect a different 3144 * random deletion handling, so disable it. 3145 */ 3146 if (adapter->pdev->vendor == PCI_VENDOR_ID_AMI && 3147 adapter->pdev->device == PCI_DEVICE_ID_AMI_MEGARAID3 && 3148 adapter->pdev->subsystem_vendor == PCI_VENDOR_ID_DELL && 3149 adapter->pdev->subsystem_device == PCI_SUBSYS_ID_CERC_ATA100_4CH && 3150 (adapter->fw_version[0] > '6' || 3151 (adapter->fw_version[0] == '6' && 3152 adapter->fw_version[2] > '6') || 3153 (adapter->fw_version[0] == '6' 3154 && adapter->fw_version[2] == '6' 3155 && adapter->fw_version[3] > '1'))) { 3156 con_log(CL_DLEVEL1, ("megaraid: disable random deletion\n")); 3157 return 0; 3158 } 3159 3160 mbox = (mbox_t *)raw_mbox; 3161 3162 memset((caddr_t)raw_mbox, 0, sizeof(mbox_t)); 3163 3164 raw_mbox[0] = FC_DEL_LOGDRV; 3165 raw_mbox[2] = OP_SUP_DEL_LOGDRV; 3166 3167 // Issue the command 3168 rval = 0; 3169 if (mbox_post_sync_cmd(adapter, raw_mbox) == 0) { 3170 3171 con_log(CL_DLEVEL1, ("megaraid: supports random deletion\n")); 3172 3173 rval = 1; 3174 } 3175 3176 return rval; 3177 } 3178 3179 3180 /** 3181 * megaraid_mbox_get_max_sg - maximum sg elements supported by the firmware 3182 * @adapter : soft state for the controller 3183 * 3184 * Find out the maximum number of scatter-gather elements supported by the 3185 * firmware. 3186 */ 3187 static int 3188 megaraid_mbox_get_max_sg(adapter_t *adapter) 3189 { 3190 mbox_t *mbox; 3191 uint8_t raw_mbox[sizeof(mbox_t)]; 3192 int nsg; 3193 3194 3195 mbox = (mbox_t *)raw_mbox; 3196 3197 memset((caddr_t)raw_mbox, 0, sizeof(mbox_t)); 3198 3199 mbox->xferaddr = (uint32_t)adapter->ibuf_dma_h; 3200 3201 memset((void *)adapter->ibuf, 0, MBOX_IBUF_SIZE); 3202 3203 raw_mbox[0] = MAIN_MISC_OPCODE; 3204 raw_mbox[2] = GET_MAX_SG_SUPPORT; 3205 3206 // Issue the command 3207 if (mbox_post_sync_cmd(adapter, raw_mbox) == 0) { 3208 nsg = *(uint8_t *)adapter->ibuf; 3209 } 3210 else { 3211 nsg = MBOX_DEFAULT_SG_SIZE; 3212 } 3213 3214 if (nsg > MBOX_MAX_SG_SIZE) nsg = MBOX_MAX_SG_SIZE; 3215 3216 return nsg; 3217 } 3218 3219 3220 /** 3221 * megaraid_mbox_enum_raid_scsi - enumerate the RAID and SCSI channels 3222 * @adapter : soft state for the controller 3223 * 3224 * Enumerate the RAID and SCSI channels for ROMB platforms so that channels 3225 * can be exported as regular SCSI channels. 3226 */ 3227 static void 3228 megaraid_mbox_enum_raid_scsi(adapter_t *adapter) 3229 { 3230 mraid_device_t *raid_dev = ADAP2RAIDDEV(adapter); 3231 mbox_t *mbox; 3232 uint8_t raw_mbox[sizeof(mbox_t)]; 3233 3234 3235 mbox = (mbox_t *)raw_mbox; 3236 3237 memset((caddr_t)raw_mbox, 0, sizeof(mbox_t)); 3238 3239 mbox->xferaddr = (uint32_t)adapter->ibuf_dma_h; 3240 3241 memset((void *)adapter->ibuf, 0, MBOX_IBUF_SIZE); 3242 3243 raw_mbox[0] = CHNL_CLASS; 3244 raw_mbox[2] = GET_CHNL_CLASS; 3245 3246 // Issue the command. If the command fails, all channels are RAID 3247 // channels 3248 raid_dev->channel_class = 0xFF; 3249 if (mbox_post_sync_cmd(adapter, raw_mbox) == 0) { 3250 raid_dev->channel_class = *(uint8_t *)adapter->ibuf; 3251 } 3252 3253 return; 3254 } 3255 3256 3257 /** 3258 * megaraid_mbox_flush_cache - flush adapter and disks cache 3259 * @adapter : soft state for the controller 3260 * 3261 * Flush adapter cache followed by disks cache. 3262 */ 3263 static void 3264 megaraid_mbox_flush_cache(adapter_t *adapter) 3265 { 3266 mbox_t *mbox; 3267 uint8_t raw_mbox[sizeof(mbox_t)]; 3268 3269 3270 mbox = (mbox_t *)raw_mbox; 3271 3272 memset((caddr_t)raw_mbox, 0, sizeof(mbox_t)); 3273 3274 raw_mbox[0] = FLUSH_ADAPTER; 3275 3276 if (mbox_post_sync_cmd(adapter, raw_mbox) != 0) { 3277 con_log(CL_ANN, ("megaraid: flush adapter failed\n")); 3278 } 3279 3280 raw_mbox[0] = FLUSH_SYSTEM; 3281 3282 if (mbox_post_sync_cmd(adapter, raw_mbox) != 0) { 3283 con_log(CL_ANN, ("megaraid: flush disks cache failed\n")); 3284 } 3285 3286 return; 3287 } 3288 3289 3290 /** 3291 * megaraid_mbox_fire_sync_cmd - fire the sync cmd 3292 * @adapter : soft state for the controller 3293 * 3294 * Clears the pending cmds in FW and reinits its RAID structs. 3295 */ 3296 static int 3297 megaraid_mbox_fire_sync_cmd(adapter_t *adapter) 3298 { 3299 mbox_t *mbox; 3300 uint8_t raw_mbox[sizeof(mbox_t)]; 3301 mraid_device_t *raid_dev = ADAP2RAIDDEV(adapter); 3302 mbox64_t *mbox64; 3303 int status = 0; 3304 int i; 3305 uint32_t dword; 3306 3307 mbox = (mbox_t *)raw_mbox; 3308 3309 memset((caddr_t)raw_mbox, 0, sizeof(mbox_t)); 3310 3311 raw_mbox[0] = 0xFF; 3312 3313 mbox64 = raid_dev->mbox64; 3314 mbox = raid_dev->mbox; 3315 3316 /* Wait until mailbox is free */ 3317 if (megaraid_busywait_mbox(raid_dev) != 0) { 3318 status = 1; 3319 goto blocked_mailbox; 3320 } 3321 3322 /* Copy mailbox data into host structure */ 3323 memcpy((caddr_t)mbox, (caddr_t)raw_mbox, 16); 3324 mbox->cmdid = 0xFE; 3325 mbox->busy = 1; 3326 mbox->poll = 0; 3327 mbox->ack = 0; 3328 mbox->numstatus = 0; 3329 mbox->status = 0; 3330 3331 wmb(); 3332 WRINDOOR(raid_dev, raid_dev->mbox_dma | 0x1); 3333 3334 /* Wait for maximum 1 min for status to post. 3335 * If the Firmware SUPPORTS the ABOVE COMMAND, 3336 * mbox->cmd will be set to 0 3337 * else 3338 * the firmware will reject the command with 3339 * mbox->numstatus set to 1 3340 */ 3341 3342 i = 0; 3343 status = 0; 3344 while (!mbox->numstatus && mbox->cmd == 0xFF) { 3345 rmb(); 3346 msleep(1); 3347 i++; 3348 if (i > 1000 * 60) { 3349 status = 1; 3350 break; 3351 } 3352 } 3353 if (mbox->numstatus == 1) 3354 status = 1; /*cmd not supported*/ 3355 3356 /* Check for interrupt line */ 3357 dword = RDOUTDOOR(raid_dev); 3358 WROUTDOOR(raid_dev, dword); 3359 WRINDOOR(raid_dev,2); 3360 3361 return status; 3362 3363 blocked_mailbox: 3364 con_log(CL_ANN, (KERN_WARNING "megaraid: blocked mailbox\n")); 3365 return status; 3366 } 3367 3368 /** 3369 * megaraid_mbox_display_scb - display SCB information, mostly debug purposes 3370 * @adapter : controller's soft state 3371 * @scb : SCB to be displayed 3372 * @level : debug level for console print 3373 * 3374 * Diplay information about the given SCB iff the current debug level is 3375 * verbose. 3376 */ 3377 static void 3378 megaraid_mbox_display_scb(adapter_t *adapter, scb_t *scb) 3379 { 3380 mbox_ccb_t *ccb; 3381 struct scsi_cmnd *scp; 3382 mbox_t *mbox; 3383 int level; 3384 int i; 3385 3386 3387 ccb = (mbox_ccb_t *)scb->ccb; 3388 scp = scb->scp; 3389 mbox = ccb->mbox; 3390 3391 level = CL_DLEVEL3; 3392 3393 con_log(level, (KERN_NOTICE 3394 "megaraid mailbox: status:%#x cmd:%#x id:%#x ", scb->status, 3395 mbox->cmd, scb->sno)); 3396 3397 con_log(level, ("sec:%#x lba:%#x addr:%#x ld:%d sg:%d\n", 3398 mbox->numsectors, mbox->lba, mbox->xferaddr, mbox->logdrv, 3399 mbox->numsge)); 3400 3401 if (!scp) return; 3402 3403 con_log(level, (KERN_NOTICE "scsi cmnd: ")); 3404 3405 for (i = 0; i < scp->cmd_len; i++) { 3406 con_log(level, ("%#2.02x ", scp->cmnd[i])); 3407 } 3408 3409 con_log(level, ("\n")); 3410 3411 return; 3412 } 3413 3414 3415 /** 3416 * megaraid_mbox_setup_device_map - manage device ids 3417 * @adapter : Driver's soft state 3418 * 3419 * Manage the device ids to have an appropriate mapping between the kernel 3420 * scsi addresses and megaraid scsi and logical drive addresses. We export 3421 * scsi devices on their actual addresses, whereas the logical drives are 3422 * exported on a virtual scsi channel. 3423 */ 3424 static void 3425 megaraid_mbox_setup_device_map(adapter_t *adapter) 3426 { 3427 uint8_t c; 3428 uint8_t t; 3429 3430 /* 3431 * First fill the values on the logical drive channel 3432 */ 3433 for (t = 0; t < LSI_MAX_LOGICAL_DRIVES_64LD; t++) 3434 adapter->device_ids[adapter->max_channel][t] = 3435 (t < adapter->init_id) ? t : t - 1; 3436 3437 adapter->device_ids[adapter->max_channel][adapter->init_id] = 0xFF; 3438 3439 /* 3440 * Fill the values on the physical devices channels 3441 */ 3442 for (c = 0; c < adapter->max_channel; c++) 3443 for (t = 0; t < LSI_MAX_LOGICAL_DRIVES_64LD; t++) 3444 adapter->device_ids[c][t] = (c << 8) | t; 3445 } 3446 3447 3448 /* 3449 * END: internal commands library 3450 */ 3451 3452 /* 3453 * START: Interface for the common management module 3454 * 3455 * This is the module, which interfaces with the common management module to 3456 * provide support for ioctl and sysfs 3457 */ 3458 3459 /** 3460 * megaraid_cmm_register - register with the management module 3461 * @adapter : HBA soft state 3462 * 3463 * Register with the management module, which allows applications to issue 3464 * ioctl calls to the drivers. This interface is used by the management module 3465 * to setup sysfs support as well. 3466 */ 3467 static int 3468 megaraid_cmm_register(adapter_t *adapter) 3469 { 3470 mraid_device_t *raid_dev = ADAP2RAIDDEV(adapter); 3471 mraid_mmadp_t adp; 3472 scb_t *scb; 3473 mbox_ccb_t *ccb; 3474 int rval; 3475 int i; 3476 3477 // Allocate memory for the base list of scb for management module. 3478 adapter->uscb_list = kcalloc(MBOX_MAX_USER_CMDS, sizeof(scb_t), GFP_KERNEL); 3479 3480 if (adapter->uscb_list == NULL) { 3481 con_log(CL_ANN, (KERN_WARNING 3482 "megaraid: out of memory, %s %d\n", __func__, 3483 __LINE__)); 3484 return -1; 3485 } 3486 3487 3488 // Initialize the synchronization parameters for resources for 3489 // commands for management module 3490 INIT_LIST_HEAD(&adapter->uscb_pool); 3491 3492 spin_lock_init(USER_FREE_LIST_LOCK(adapter)); 3493 3494 3495 3496 // link all the packets. Note, CCB for commands, coming from the 3497 // commom management module, mailbox physical address are already 3498 // setup by it. We just need placeholder for that in our local command 3499 // control blocks 3500 for (i = 0; i < MBOX_MAX_USER_CMDS; i++) { 3501 3502 scb = adapter->uscb_list + i; 3503 ccb = raid_dev->uccb_list + i; 3504 3505 scb->ccb = (caddr_t)ccb; 3506 ccb->mbox64 = raid_dev->umbox64 + i; 3507 ccb->mbox = &ccb->mbox64->mbox32; 3508 ccb->raw_mbox = (uint8_t *)ccb->mbox; 3509 3510 scb->gp = 0; 3511 3512 // COMMAND ID 0 - (MBOX_MAX_SCSI_CMDS-1) ARE RESERVED FOR 3513 // COMMANDS COMING FROM IO SUBSYSTEM (MID-LAYER) 3514 scb->sno = i + MBOX_MAX_SCSI_CMDS; 3515 3516 scb->scp = NULL; 3517 scb->state = SCB_FREE; 3518 scb->dma_direction = PCI_DMA_NONE; 3519 scb->dma_type = MRAID_DMA_NONE; 3520 scb->dev_channel = -1; 3521 scb->dev_target = -1; 3522 3523 // put scb in the free pool 3524 list_add_tail(&scb->list, &adapter->uscb_pool); 3525 } 3526 3527 adp.unique_id = adapter->unique_id; 3528 adp.drvr_type = DRVRTYPE_MBOX; 3529 adp.drvr_data = (unsigned long)adapter; 3530 adp.pdev = adapter->pdev; 3531 adp.issue_uioc = megaraid_mbox_mm_handler; 3532 adp.timeout = MBOX_RESET_WAIT + MBOX_RESET_EXT_WAIT; 3533 adp.max_kioc = MBOX_MAX_USER_CMDS; 3534 3535 if ((rval = mraid_mm_register_adp(&adp)) != 0) { 3536 3537 con_log(CL_ANN, (KERN_WARNING 3538 "megaraid mbox: did not register with CMM\n")); 3539 3540 kfree(adapter->uscb_list); 3541 } 3542 3543 return rval; 3544 } 3545 3546 3547 /** 3548 * megaraid_cmm_unregister - un-register with the management module 3549 * @adapter : HBA soft state 3550 * 3551 * Un-register with the management module. 3552 * FIXME: mgmt module must return failure for unregister if it has pending 3553 * commands in LLD. 3554 */ 3555 static int 3556 megaraid_cmm_unregister(adapter_t *adapter) 3557 { 3558 kfree(adapter->uscb_list); 3559 mraid_mm_unregister_adp(adapter->unique_id); 3560 return 0; 3561 } 3562 3563 3564 /** 3565 * megaraid_mbox_mm_handler - interface for CMM to issue commands to LLD 3566 * @drvr_data : LLD specific data 3567 * @kioc : CMM interface packet 3568 * @action : command action 3569 * 3570 * This routine is invoked whenever the Common Management Module (CMM) has a 3571 * command for us. The 'action' parameter specifies if this is a new command 3572 * or otherwise. 3573 */ 3574 static int 3575 megaraid_mbox_mm_handler(unsigned long drvr_data, uioc_t *kioc, uint32_t action) 3576 { 3577 adapter_t *adapter; 3578 3579 if (action != IOCTL_ISSUE) { 3580 con_log(CL_ANN, (KERN_WARNING 3581 "megaraid: unsupported management action:%#2x\n", 3582 action)); 3583 return (-ENOTSUPP); 3584 } 3585 3586 adapter = (adapter_t *)drvr_data; 3587 3588 // make sure this adapter is not being detached right now. 3589 if (atomic_read(&adapter->being_detached)) { 3590 con_log(CL_ANN, (KERN_WARNING 3591 "megaraid: reject management request, detaching\n")); 3592 return (-ENODEV); 3593 } 3594 3595 switch (kioc->opcode) { 3596 3597 case GET_ADAP_INFO: 3598 3599 kioc->status = gather_hbainfo(adapter, (mraid_hba_info_t *) 3600 (unsigned long)kioc->buf_vaddr); 3601 3602 kioc->done(kioc); 3603 3604 return kioc->status; 3605 3606 case MBOX_CMD: 3607 3608 return megaraid_mbox_mm_command(adapter, kioc); 3609 3610 default: 3611 kioc->status = (-EINVAL); 3612 kioc->done(kioc); 3613 return (-EINVAL); 3614 } 3615 3616 return 0; // not reached 3617 } 3618 3619 /** 3620 * megaraid_mbox_mm_command - issues commands routed through CMM 3621 * @adapter : HBA soft state 3622 * @kioc : management command packet 3623 * 3624 * Issues commands, which are routed through the management module. 3625 */ 3626 static int 3627 megaraid_mbox_mm_command(adapter_t *adapter, uioc_t *kioc) 3628 { 3629 struct list_head *head = &adapter->uscb_pool; 3630 mbox64_t *mbox64; 3631 uint8_t *raw_mbox; 3632 scb_t *scb; 3633 mbox_ccb_t *ccb; 3634 unsigned long flags; 3635 3636 // detach one scb from free pool 3637 spin_lock_irqsave(USER_FREE_LIST_LOCK(adapter), flags); 3638 3639 if (list_empty(head)) { // should never happen because of CMM 3640 3641 con_log(CL_ANN, (KERN_WARNING 3642 "megaraid mbox: bug in cmm handler, lost resources\n")); 3643 3644 spin_unlock_irqrestore(USER_FREE_LIST_LOCK(adapter), flags); 3645 3646 return (-EINVAL); 3647 } 3648 3649 scb = list_entry(head->next, scb_t, list); 3650 list_del_init(&scb->list); 3651 3652 spin_unlock_irqrestore(USER_FREE_LIST_LOCK(adapter), flags); 3653 3654 scb->state = SCB_ACTIVE; 3655 scb->dma_type = MRAID_DMA_NONE; 3656 scb->dma_direction = PCI_DMA_NONE; 3657 3658 ccb = (mbox_ccb_t *)scb->ccb; 3659 mbox64 = (mbox64_t *)(unsigned long)kioc->cmdbuf; 3660 raw_mbox = (uint8_t *)&mbox64->mbox32; 3661 3662 memcpy(ccb->mbox64, mbox64, sizeof(mbox64_t)); 3663 3664 scb->gp = (unsigned long)kioc; 3665 3666 /* 3667 * If it is a logdrv random delete operation, we have to wait till 3668 * there are no outstanding cmds at the fw and then issue it directly 3669 */ 3670 if (raw_mbox[0] == FC_DEL_LOGDRV && raw_mbox[2] == OP_DEL_LOGDRV) { 3671 3672 if (wait_till_fw_empty(adapter)) { 3673 con_log(CL_ANN, (KERN_NOTICE 3674 "megaraid mbox: LD delete, timed out\n")); 3675 3676 kioc->status = -ETIME; 3677 3678 scb->status = -1; 3679 3680 megaraid_mbox_mm_done(adapter, scb); 3681 3682 return (-ETIME); 3683 } 3684 3685 INIT_LIST_HEAD(&scb->list); 3686 3687 scb->state = SCB_ISSUED; 3688 if (mbox_post_cmd(adapter, scb) != 0) { 3689 3690 con_log(CL_ANN, (KERN_NOTICE 3691 "megaraid mbox: LD delete, mailbox busy\n")); 3692 3693 kioc->status = -EBUSY; 3694 3695 scb->status = -1; 3696 3697 megaraid_mbox_mm_done(adapter, scb); 3698 3699 return (-EBUSY); 3700 } 3701 3702 return 0; 3703 } 3704 3705 // put the command on the pending list and execute 3706 megaraid_mbox_runpendq(adapter, scb); 3707 3708 return 0; 3709 } 3710 3711 3712 static int 3713 wait_till_fw_empty(adapter_t *adapter) 3714 { 3715 unsigned long flags = 0; 3716 int i; 3717 3718 3719 /* 3720 * Set the quiescent flag to stop issuing cmds to FW. 3721 */ 3722 spin_lock_irqsave(&adapter->lock, flags); 3723 adapter->quiescent++; 3724 spin_unlock_irqrestore(&adapter->lock, flags); 3725 3726 /* 3727 * Wait till there are no more cmds outstanding at FW. Try for at most 3728 * 60 seconds 3729 */ 3730 for (i = 0; i < 60 && adapter->outstanding_cmds; i++) { 3731 con_log(CL_DLEVEL1, (KERN_INFO 3732 "megaraid: FW has %d pending commands\n", 3733 adapter->outstanding_cmds)); 3734 3735 msleep(1000); 3736 } 3737 3738 return adapter->outstanding_cmds; 3739 } 3740 3741 3742 /** 3743 * megaraid_mbox_mm_done - callback for CMM commands 3744 * @adapter : HBA soft state 3745 * @scb : completed command 3746 * 3747 * Callback routine for internal commands originated from the management 3748 * module. 3749 */ 3750 static void 3751 megaraid_mbox_mm_done(adapter_t *adapter, scb_t *scb) 3752 { 3753 uioc_t *kioc; 3754 mbox64_t *mbox64; 3755 uint8_t *raw_mbox; 3756 unsigned long flags; 3757 3758 kioc = (uioc_t *)scb->gp; 3759 mbox64 = (mbox64_t *)(unsigned long)kioc->cmdbuf; 3760 mbox64->mbox32.status = scb->status; 3761 raw_mbox = (uint8_t *)&mbox64->mbox32; 3762 3763 3764 // put scb in the free pool 3765 scb->state = SCB_FREE; 3766 scb->scp = NULL; 3767 3768 spin_lock_irqsave(USER_FREE_LIST_LOCK(adapter), flags); 3769 3770 list_add(&scb->list, &adapter->uscb_pool); 3771 3772 spin_unlock_irqrestore(USER_FREE_LIST_LOCK(adapter), flags); 3773 3774 // if a delete logical drive operation succeeded, restart the 3775 // controller 3776 if (raw_mbox[0] == FC_DEL_LOGDRV && raw_mbox[2] == OP_DEL_LOGDRV) { 3777 3778 adapter->quiescent--; 3779 3780 megaraid_mbox_runpendq(adapter, NULL); 3781 } 3782 3783 kioc->done(kioc); 3784 3785 return; 3786 } 3787 3788 3789 /** 3790 * gather_hbainfo - HBA characteristics for the applications 3791 * @adapter : HBA soft state 3792 * @hinfo : pointer to the caller's host info strucuture 3793 */ 3794 static int 3795 gather_hbainfo(adapter_t *adapter, mraid_hba_info_t *hinfo) 3796 { 3797 uint8_t dmajor; 3798 3799 dmajor = megaraid_mbox_version[0]; 3800 3801 hinfo->pci_vendor_id = adapter->pdev->vendor; 3802 hinfo->pci_device_id = adapter->pdev->device; 3803 hinfo->subsys_vendor_id = adapter->pdev->subsystem_vendor; 3804 hinfo->subsys_device_id = adapter->pdev->subsystem_device; 3805 3806 hinfo->pci_bus = adapter->pdev->bus->number; 3807 hinfo->pci_dev_fn = adapter->pdev->devfn; 3808 hinfo->pci_slot = PCI_SLOT(adapter->pdev->devfn); 3809 hinfo->irq = adapter->host->irq; 3810 hinfo->baseport = ADAP2RAIDDEV(adapter)->baseport; 3811 3812 hinfo->unique_id = (hinfo->pci_bus << 8) | adapter->pdev->devfn; 3813 hinfo->host_no = adapter->host->host_no; 3814 3815 return 0; 3816 } 3817 3818 /* 3819 * END: Interface for the common management module 3820 */ 3821 3822 3823 3824 /** 3825 * megaraid_sysfs_alloc_resources - allocate sysfs related resources 3826 * @adapter : controller's soft state 3827 * 3828 * Allocate packets required to issue FW calls whenever the sysfs attributes 3829 * are read. These attributes would require up-to-date information from the 3830 * FW. Also set up resources for mutual exclusion to share these resources and 3831 * the wait queue. 3832 * 3833 * Return 0 on success. 3834 * Return -ERROR_CODE on failure. 3835 */ 3836 static int 3837 megaraid_sysfs_alloc_resources(adapter_t *adapter) 3838 { 3839 mraid_device_t *raid_dev = ADAP2RAIDDEV(adapter); 3840 int rval = 0; 3841 3842 raid_dev->sysfs_uioc = kmalloc(sizeof(uioc_t), GFP_KERNEL); 3843 3844 raid_dev->sysfs_mbox64 = kmalloc(sizeof(mbox64_t), GFP_KERNEL); 3845 3846 raid_dev->sysfs_buffer = pci_alloc_consistent(adapter->pdev, 3847 PAGE_SIZE, &raid_dev->sysfs_buffer_dma); 3848 3849 if (!raid_dev->sysfs_uioc || !raid_dev->sysfs_mbox64 || 3850 !raid_dev->sysfs_buffer) { 3851 3852 con_log(CL_ANN, (KERN_WARNING 3853 "megaraid: out of memory, %s %d\n", __func__, 3854 __LINE__)); 3855 3856 rval = -ENOMEM; 3857 3858 megaraid_sysfs_free_resources(adapter); 3859 } 3860 3861 mutex_init(&raid_dev->sysfs_mtx); 3862 3863 init_waitqueue_head(&raid_dev->sysfs_wait_q); 3864 3865 return rval; 3866 } 3867 3868 3869 /** 3870 * megaraid_sysfs_free_resources - free sysfs related resources 3871 * @adapter : controller's soft state 3872 * 3873 * Free packets allocated for sysfs FW commands 3874 */ 3875 static void 3876 megaraid_sysfs_free_resources(adapter_t *adapter) 3877 { 3878 mraid_device_t *raid_dev = ADAP2RAIDDEV(adapter); 3879 3880 kfree(raid_dev->sysfs_uioc); 3881 kfree(raid_dev->sysfs_mbox64); 3882 3883 if (raid_dev->sysfs_buffer) { 3884 pci_free_consistent(adapter->pdev, PAGE_SIZE, 3885 raid_dev->sysfs_buffer, raid_dev->sysfs_buffer_dma); 3886 } 3887 } 3888 3889 3890 /** 3891 * megaraid_sysfs_get_ldmap_done - callback for get ldmap 3892 * @uioc : completed packet 3893 * 3894 * Callback routine called in the ISR/tasklet context for get ldmap call 3895 */ 3896 static void 3897 megaraid_sysfs_get_ldmap_done(uioc_t *uioc) 3898 { 3899 adapter_t *adapter = (adapter_t *)uioc->buf_vaddr; 3900 mraid_device_t *raid_dev = ADAP2RAIDDEV(adapter); 3901 3902 uioc->status = 0; 3903 3904 wake_up(&raid_dev->sysfs_wait_q); 3905 } 3906 3907 /** 3908 * megaraid_sysfs_get_ldmap_timeout - timeout handling for get ldmap 3909 * @t : timed out timer 3910 * 3911 * Timeout routine to recover and return to application, in case the adapter 3912 * has stopped responding. A timeout of 60 seconds for this command seems like 3913 * a good value. 3914 */ 3915 static void 3916 megaraid_sysfs_get_ldmap_timeout(struct timer_list *t) 3917 { 3918 struct uioc_timeout *timeout = from_timer(timeout, t, timer); 3919 uioc_t *uioc = timeout->uioc; 3920 adapter_t *adapter = (adapter_t *)uioc->buf_vaddr; 3921 mraid_device_t *raid_dev = ADAP2RAIDDEV(adapter); 3922 3923 uioc->status = -ETIME; 3924 3925 wake_up(&raid_dev->sysfs_wait_q); 3926 } 3927 3928 3929 /** 3930 * megaraid_sysfs_get_ldmap - get update logical drive map 3931 * @adapter : controller's soft state 3932 * 3933 * This routine will be called whenever user reads the logical drive 3934 * attributes, go get the current logical drive mapping table from the 3935 * firmware. We use the management API's to issue commands to the controller. 3936 * 3937 * NOTE: The commands issuance functionality is not generalized and 3938 * implemented in context of "get ld map" command only. If required, the 3939 * command issuance logical can be trivially pulled out and implemented as a 3940 * standalone library. For now, this should suffice since there is no other 3941 * user of this interface. 3942 * 3943 * Return 0 on success. 3944 * Return -1 on failure. 3945 */ 3946 static int 3947 megaraid_sysfs_get_ldmap(adapter_t *adapter) 3948 { 3949 mraid_device_t *raid_dev = ADAP2RAIDDEV(adapter); 3950 uioc_t *uioc; 3951 mbox64_t *mbox64; 3952 mbox_t *mbox; 3953 char *raw_mbox; 3954 struct uioc_timeout timeout; 3955 caddr_t ldmap; 3956 int rval = 0; 3957 3958 /* 3959 * Allow only one read at a time to go through the sysfs attributes 3960 */ 3961 mutex_lock(&raid_dev->sysfs_mtx); 3962 3963 uioc = raid_dev->sysfs_uioc; 3964 mbox64 = raid_dev->sysfs_mbox64; 3965 ldmap = raid_dev->sysfs_buffer; 3966 3967 memset(uioc, 0, sizeof(uioc_t)); 3968 memset(mbox64, 0, sizeof(mbox64_t)); 3969 memset(ldmap, 0, sizeof(raid_dev->curr_ldmap)); 3970 3971 mbox = &mbox64->mbox32; 3972 raw_mbox = (char *)mbox; 3973 uioc->cmdbuf = (uint64_t)(unsigned long)mbox64; 3974 uioc->buf_vaddr = (caddr_t)adapter; 3975 uioc->status = -ENODATA; 3976 uioc->done = megaraid_sysfs_get_ldmap_done; 3977 3978 /* 3979 * Prepare the mailbox packet to get the current logical drive mapping 3980 * table 3981 */ 3982 mbox->xferaddr = (uint32_t)raid_dev->sysfs_buffer_dma; 3983 3984 raw_mbox[0] = FC_DEL_LOGDRV; 3985 raw_mbox[2] = OP_GET_LDID_MAP; 3986 3987 /* 3988 * Setup a timer to recover from a non-responding controller 3989 */ 3990 timeout.uioc = uioc; 3991 timer_setup_on_stack(&timeout.timer, 3992 megaraid_sysfs_get_ldmap_timeout, 0); 3993 3994 timeout.timer.expires = jiffies + 60 * HZ; 3995 add_timer(&timeout.timer); 3996 3997 /* 3998 * Send the command to the firmware 3999 */ 4000 rval = megaraid_mbox_mm_command(adapter, uioc); 4001 4002 if (rval == 0) { // command successfully issued 4003 wait_event(raid_dev->sysfs_wait_q, (uioc->status != -ENODATA)); 4004 4005 /* 4006 * Check if the command timed out 4007 */ 4008 if (uioc->status == -ETIME) { 4009 con_log(CL_ANN, (KERN_NOTICE 4010 "megaraid: sysfs get ld map timed out\n")); 4011 4012 rval = -ETIME; 4013 } 4014 else { 4015 rval = mbox->status; 4016 } 4017 4018 if (rval == 0) { 4019 memcpy(raid_dev->curr_ldmap, ldmap, 4020 sizeof(raid_dev->curr_ldmap)); 4021 } 4022 else { 4023 con_log(CL_ANN, (KERN_NOTICE 4024 "megaraid: get ld map failed with %x\n", rval)); 4025 } 4026 } 4027 else { 4028 con_log(CL_ANN, (KERN_NOTICE 4029 "megaraid: could not issue ldmap command:%x\n", rval)); 4030 } 4031 4032 4033 del_timer_sync(&timeout.timer); 4034 destroy_timer_on_stack(&timeout.timer); 4035 4036 mutex_unlock(&raid_dev->sysfs_mtx); 4037 4038 return rval; 4039 } 4040 4041 4042 /** 4043 * megaraid_sysfs_show_app_hndl - display application handle for this adapter 4044 * @cdev : class device object representation for the host 4045 * @buf : buffer to send data to 4046 * 4047 * Display the handle used by the applications while executing management 4048 * tasks on the adapter. We invoke a management module API to get the adapter 4049 * handle, since we do not interface with applications directly. 4050 */ 4051 static ssize_t 4052 megaraid_sysfs_show_app_hndl(struct device *dev, struct device_attribute *attr, 4053 char *buf) 4054 { 4055 struct Scsi_Host *shost = class_to_shost(dev); 4056 adapter_t *adapter = (adapter_t *)SCSIHOST2ADAP(shost); 4057 uint32_t app_hndl; 4058 4059 app_hndl = mraid_mm_adapter_app_handle(adapter->unique_id); 4060 4061 return snprintf(buf, 8, "%u\n", app_hndl); 4062 } 4063 4064 4065 /** 4066 * megaraid_sysfs_show_ldnum - display the logical drive number for this device 4067 * @dev : device object representation for the scsi device 4068 * @attr : device attribute to show 4069 * @buf : buffer to send data to 4070 * 4071 * Display the logical drive number for the device in question, if it a valid 4072 * logical drive. For physical devices, "-1" is returned. 4073 * 4074 * The logical drive number is displayed in following format: 4075 * 4076 * <SCSI ID> <LD NUM> <LD STICKY ID> <APP ADAPTER HANDLE> 4077 * 4078 * <int> <int> <int> <int> 4079 */ 4080 static ssize_t 4081 megaraid_sysfs_show_ldnum(struct device *dev, struct device_attribute *attr, char *buf) 4082 { 4083 struct scsi_device *sdev = to_scsi_device(dev); 4084 adapter_t *adapter = (adapter_t *)SCSIHOST2ADAP(sdev->host); 4085 mraid_device_t *raid_dev = ADAP2RAIDDEV(adapter); 4086 int scsi_id = -1; 4087 int logical_drv = -1; 4088 int ldid_map = -1; 4089 uint32_t app_hndl = 0; 4090 int mapped_sdev_id; 4091 int rval; 4092 int i; 4093 4094 if (raid_dev->random_del_supported && 4095 MRAID_IS_LOGICAL_SDEV(adapter, sdev)) { 4096 4097 rval = megaraid_sysfs_get_ldmap(adapter); 4098 if (rval == 0) { 4099 4100 for (i = 0; i < MAX_LOGICAL_DRIVES_40LD; i++) { 4101 4102 mapped_sdev_id = sdev->id; 4103 4104 if (sdev->id > adapter->init_id) { 4105 mapped_sdev_id -= 1; 4106 } 4107 4108 if (raid_dev->curr_ldmap[i] == mapped_sdev_id) { 4109 4110 scsi_id = sdev->id; 4111 4112 logical_drv = i; 4113 4114 ldid_map = raid_dev->curr_ldmap[i]; 4115 4116 app_hndl = mraid_mm_adapter_app_handle( 4117 adapter->unique_id); 4118 4119 break; 4120 } 4121 } 4122 } 4123 else { 4124 con_log(CL_ANN, (KERN_NOTICE 4125 "megaraid: sysfs get ld map failed: %x\n", 4126 rval)); 4127 } 4128 } 4129 4130 return snprintf(buf, 36, "%d %d %d %d\n", scsi_id, logical_drv, 4131 ldid_map, app_hndl); 4132 } 4133 4134 4135 /* 4136 * END: Mailbox Low Level Driver 4137 */ 4138 module_init(megaraid_init); 4139 module_exit(megaraid_exit); 4140 4141 /* vim: set ts=8 sw=8 tw=78 ai si: */ 4142