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_device_reset_handler = megaraid_reset_handler, 345 .eh_bus_reset_handler = megaraid_reset_handler, 346 .eh_host_reset_handler = megaraid_reset_handler, 347 .change_queue_depth = scsi_change_queue_depth, 348 .use_clustering = ENABLE_CLUSTERING, 349 .no_write_same = 1, 350 .sdev_attrs = megaraid_sdev_attrs, 351 .shost_attrs = megaraid_shost_attrs, 352 }; 353 354 355 /** 356 * megaraid_init - module load hook 357 * 358 * We register ourselves as hotplug enabled module and let PCI subsystem 359 * discover our adapters. 360 */ 361 static int __init 362 megaraid_init(void) 363 { 364 int rval; 365 366 // Announce the driver version 367 con_log(CL_ANN, (KERN_INFO "megaraid: %s %s\n", MEGARAID_VERSION, 368 MEGARAID_EXT_VERSION)); 369 370 // check validity of module parameters 371 if (megaraid_cmd_per_lun > MBOX_MAX_SCSI_CMDS) { 372 373 con_log(CL_ANN, (KERN_WARNING 374 "megaraid mailbox: max commands per lun reset to %d\n", 375 MBOX_MAX_SCSI_CMDS)); 376 377 megaraid_cmd_per_lun = MBOX_MAX_SCSI_CMDS; 378 } 379 380 381 // register as a PCI hot-plug driver module 382 rval = pci_register_driver(&megaraid_pci_driver); 383 if (rval < 0) { 384 con_log(CL_ANN, (KERN_WARNING 385 "megaraid: could not register hotplug support.\n")); 386 } 387 388 return rval; 389 } 390 391 392 /** 393 * megaraid_exit - driver unload entry point 394 * 395 * We simply unwrap the megaraid_init routine here. 396 */ 397 static void __exit 398 megaraid_exit(void) 399 { 400 con_log(CL_DLEVEL1, (KERN_NOTICE "megaraid: unloading framework\n")); 401 402 // unregister as PCI hotplug driver 403 pci_unregister_driver(&megaraid_pci_driver); 404 405 return; 406 } 407 408 409 /** 410 * megaraid_probe_one - PCI hotplug entry point 411 * @pdev : handle to this controller's PCI configuration space 412 * @id : pci device id of the class of controllers 413 * 414 * This routine should be called whenever a new adapter is detected by the 415 * PCI hotplug susbsystem. 416 */ 417 static int 418 megaraid_probe_one(struct pci_dev *pdev, const struct pci_device_id *id) 419 { 420 adapter_t *adapter; 421 422 423 // detected a new controller 424 con_log(CL_ANN, (KERN_INFO 425 "megaraid: probe new device %#4.04x:%#4.04x:%#4.04x:%#4.04x: ", 426 pdev->vendor, pdev->device, pdev->subsystem_vendor, 427 pdev->subsystem_device)); 428 429 con_log(CL_ANN, ("bus %d:slot %d:func %d\n", pdev->bus->number, 430 PCI_SLOT(pdev->devfn), PCI_FUNC(pdev->devfn))); 431 432 if (pci_enable_device(pdev)) { 433 con_log(CL_ANN, (KERN_WARNING 434 "megaraid: pci_enable_device failed\n")); 435 436 return -ENODEV; 437 } 438 439 // Enable bus-mastering on this controller 440 pci_set_master(pdev); 441 442 // Allocate the per driver initialization structure 443 adapter = kzalloc(sizeof(adapter_t), GFP_KERNEL); 444 445 if (adapter == NULL) { 446 con_log(CL_ANN, (KERN_WARNING 447 "megaraid: out of memory, %s %d.\n", __func__, __LINE__)); 448 449 goto out_probe_one; 450 } 451 452 453 // set up PCI related soft state and other pre-known parameters 454 adapter->unique_id = pdev->bus->number << 8 | pdev->devfn; 455 adapter->irq = pdev->irq; 456 adapter->pdev = pdev; 457 458 atomic_set(&adapter->being_detached, 0); 459 460 // Setup the default DMA mask. This would be changed later on 461 // depending on hardware capabilities 462 if (pci_set_dma_mask(adapter->pdev, DMA_BIT_MASK(32)) != 0) { 463 464 con_log(CL_ANN, (KERN_WARNING 465 "megaraid: pci_set_dma_mask failed:%d\n", __LINE__)); 466 467 goto out_free_adapter; 468 } 469 470 471 // Initialize the synchronization lock for kernel and LLD 472 spin_lock_init(&adapter->lock); 473 474 // Initialize the command queues: the list of free SCBs and the list 475 // of pending SCBs. 476 INIT_LIST_HEAD(&adapter->kscb_pool); 477 spin_lock_init(SCSI_FREE_LIST_LOCK(adapter)); 478 479 INIT_LIST_HEAD(&adapter->pend_list); 480 spin_lock_init(PENDING_LIST_LOCK(adapter)); 481 482 INIT_LIST_HEAD(&adapter->completed_list); 483 spin_lock_init(COMPLETED_LIST_LOCK(adapter)); 484 485 486 // Start the mailbox based controller 487 if (megaraid_init_mbox(adapter) != 0) { 488 con_log(CL_ANN, (KERN_WARNING 489 "megaraid: maibox adapter did not initialize\n")); 490 491 goto out_free_adapter; 492 } 493 494 // Register with LSI Common Management Module 495 if (megaraid_cmm_register(adapter) != 0) { 496 497 con_log(CL_ANN, (KERN_WARNING 498 "megaraid: could not register with management module\n")); 499 500 goto out_fini_mbox; 501 } 502 503 // setup adapter handle in PCI soft state 504 pci_set_drvdata(pdev, adapter); 505 506 // attach with scsi mid-layer 507 if (megaraid_io_attach(adapter) != 0) { 508 509 con_log(CL_ANN, (KERN_WARNING "megaraid: io attach failed\n")); 510 511 goto out_cmm_unreg; 512 } 513 514 return 0; 515 516 out_cmm_unreg: 517 megaraid_cmm_unregister(adapter); 518 out_fini_mbox: 519 megaraid_fini_mbox(adapter); 520 out_free_adapter: 521 kfree(adapter); 522 out_probe_one: 523 pci_disable_device(pdev); 524 525 return -ENODEV; 526 } 527 528 529 /** 530 * megaraid_detach_one - release framework resources and call LLD release routine 531 * @pdev : handle for our PCI configuration space 532 * 533 * This routine is called during driver unload. We free all the allocated 534 * resources and call the corresponding LLD so that it can also release all 535 * its resources. 536 * 537 * This routine is also called from the PCI hotplug system. 538 */ 539 static void 540 megaraid_detach_one(struct pci_dev *pdev) 541 { 542 adapter_t *adapter; 543 struct Scsi_Host *host; 544 545 546 // Start a rollback on this adapter 547 adapter = pci_get_drvdata(pdev); 548 549 if (!adapter) { 550 con_log(CL_ANN, (KERN_CRIT 551 "megaraid: Invalid detach on %#4.04x:%#4.04x:%#4.04x:%#4.04x\n", 552 pdev->vendor, pdev->device, pdev->subsystem_vendor, 553 pdev->subsystem_device)); 554 555 return; 556 } 557 else { 558 con_log(CL_ANN, (KERN_NOTICE 559 "megaraid: detaching device %#4.04x:%#4.04x:%#4.04x:%#4.04x\n", 560 pdev->vendor, pdev->device, pdev->subsystem_vendor, 561 pdev->subsystem_device)); 562 } 563 564 565 host = adapter->host; 566 567 // do not allow any more requests from the management module for this 568 // adapter. 569 // FIXME: How do we account for the request which might still be 570 // pending with us? 571 atomic_set(&adapter->being_detached, 1); 572 573 // detach from the IO sub-system 574 megaraid_io_detach(adapter); 575 576 // Unregister from common management module 577 // 578 // FIXME: this must return success or failure for conditions if there 579 // is a command pending with LLD or not. 580 megaraid_cmm_unregister(adapter); 581 582 // finalize the mailbox based controller and release all resources 583 megaraid_fini_mbox(adapter); 584 585 kfree(adapter); 586 587 scsi_host_put(host); 588 589 pci_disable_device(pdev); 590 591 return; 592 } 593 594 595 /** 596 * megaraid_mbox_shutdown - PCI shutdown for megaraid HBA 597 * @pdev : generic driver model device 598 * 599 * Shutdown notification, perform flush cache. 600 */ 601 static void 602 megaraid_mbox_shutdown(struct pci_dev *pdev) 603 { 604 adapter_t *adapter = pci_get_drvdata(pdev); 605 static int counter; 606 607 if (!adapter) { 608 con_log(CL_ANN, (KERN_WARNING 609 "megaraid: null device in shutdown\n")); 610 return; 611 } 612 613 // flush caches now 614 con_log(CL_ANN, (KERN_INFO "megaraid: flushing adapter %d...", 615 counter++)); 616 617 megaraid_mbox_flush_cache(adapter); 618 619 con_log(CL_ANN, ("done\n")); 620 } 621 622 623 /** 624 * megaraid_io_attach - attach a device with the IO subsystem 625 * @adapter : controller's soft state 626 * 627 * Attach this device with the IO subsystem. 628 */ 629 static int 630 megaraid_io_attach(adapter_t *adapter) 631 { 632 struct Scsi_Host *host; 633 634 // Initialize SCSI Host structure 635 host = scsi_host_alloc(&megaraid_template_g, 8); 636 if (!host) { 637 con_log(CL_ANN, (KERN_WARNING 638 "megaraid mbox: scsi_register failed\n")); 639 640 return -1; 641 } 642 643 SCSIHOST2ADAP(host) = (caddr_t)adapter; 644 adapter->host = host; 645 646 host->irq = adapter->irq; 647 host->unique_id = adapter->unique_id; 648 host->can_queue = adapter->max_cmds; 649 host->this_id = adapter->init_id; 650 host->sg_tablesize = adapter->sglen; 651 host->max_sectors = adapter->max_sectors; 652 host->cmd_per_lun = adapter->cmd_per_lun; 653 host->max_channel = adapter->max_channel; 654 host->max_id = adapter->max_target; 655 host->max_lun = adapter->max_lun; 656 657 658 // notify mid-layer about the new controller 659 if (scsi_add_host(host, &adapter->pdev->dev)) { 660 661 con_log(CL_ANN, (KERN_WARNING 662 "megaraid mbox: scsi_add_host failed\n")); 663 664 scsi_host_put(host); 665 666 return -1; 667 } 668 669 scsi_scan_host(host); 670 671 return 0; 672 } 673 674 675 /** 676 * megaraid_io_detach - detach a device from the IO subsystem 677 * @adapter : controller's soft state 678 * 679 * Detach this device from the IO subsystem. 680 */ 681 static void 682 megaraid_io_detach(adapter_t *adapter) 683 { 684 struct Scsi_Host *host; 685 686 con_log(CL_DLEVEL1, (KERN_INFO "megaraid: io detach\n")); 687 688 host = adapter->host; 689 690 scsi_remove_host(host); 691 692 return; 693 } 694 695 696 /* 697 * START: Mailbox Low Level Driver 698 * 699 * This is section specific to the single mailbox based controllers 700 */ 701 702 /** 703 * megaraid_init_mbox - initialize controller 704 * @adapter : our soft state 705 * 706 * - Allocate 16-byte aligned mailbox memory for firmware handshake 707 * - Allocate controller's memory resources 708 * - Find out all initialization data 709 * - Allocate memory required for all the commands 710 * - Use internal library of FW routines, build up complete soft state 711 */ 712 static int 713 megaraid_init_mbox(adapter_t *adapter) 714 { 715 struct pci_dev *pdev; 716 mraid_device_t *raid_dev; 717 int i; 718 uint32_t magic64; 719 720 721 adapter->ito = MBOX_TIMEOUT; 722 pdev = adapter->pdev; 723 724 /* 725 * Allocate and initialize the init data structure for mailbox 726 * controllers 727 */ 728 raid_dev = kzalloc(sizeof(mraid_device_t), GFP_KERNEL); 729 if (raid_dev == NULL) return -1; 730 731 732 /* 733 * Attach the adapter soft state to raid device soft state 734 */ 735 adapter->raid_device = (caddr_t)raid_dev; 736 raid_dev->fast_load = megaraid_fast_load; 737 738 739 // our baseport 740 raid_dev->baseport = pci_resource_start(pdev, 0); 741 742 if (pci_request_regions(pdev, "MegaRAID: LSI Logic Corporation") != 0) { 743 744 con_log(CL_ANN, (KERN_WARNING 745 "megaraid: mem region busy\n")); 746 747 goto out_free_raid_dev; 748 } 749 750 raid_dev->baseaddr = ioremap_nocache(raid_dev->baseport, 128); 751 752 if (!raid_dev->baseaddr) { 753 754 con_log(CL_ANN, (KERN_WARNING 755 "megaraid: could not map hba memory\n") ); 756 757 goto out_release_regions; 758 } 759 760 /* initialize the mutual exclusion lock for the mailbox */ 761 spin_lock_init(&raid_dev->mailbox_lock); 762 763 /* allocate memory required for commands */ 764 if (megaraid_alloc_cmd_packets(adapter) != 0) 765 goto out_iounmap; 766 767 /* 768 * Issue SYNC cmd to flush the pending cmds in the adapter 769 * and initialize its internal state 770 */ 771 772 if (megaraid_mbox_fire_sync_cmd(adapter)) 773 con_log(CL_ANN, ("megaraid: sync cmd failed\n")); 774 775 /* 776 * Setup the rest of the soft state using the library of 777 * FW routines 778 */ 779 780 /* request IRQ and register the interrupt service routine */ 781 if (request_irq(adapter->irq, megaraid_isr, IRQF_SHARED, "megaraid", 782 adapter)) { 783 784 con_log(CL_ANN, (KERN_WARNING 785 "megaraid: Couldn't register IRQ %d!\n", adapter->irq)); 786 goto out_alloc_cmds; 787 788 } 789 790 // Product info 791 if (megaraid_mbox_product_info(adapter) != 0) 792 goto out_free_irq; 793 794 // Do we support extended CDBs 795 adapter->max_cdb_sz = 10; 796 if (megaraid_mbox_extended_cdb(adapter) == 0) { 797 adapter->max_cdb_sz = 16; 798 } 799 800 /* 801 * Do we support cluster environment, if we do, what is the initiator 802 * id. 803 * NOTE: In a non-cluster aware firmware environment, the LLD should 804 * return 7 as initiator id. 805 */ 806 adapter->ha = 0; 807 adapter->init_id = -1; 808 if (megaraid_mbox_support_ha(adapter, &adapter->init_id) == 0) { 809 adapter->ha = 1; 810 } 811 812 /* 813 * Prepare the device ids array to have the mapping between the kernel 814 * device address and megaraid device address. 815 * We export the physical devices on their actual addresses. The 816 * logical drives are exported on a virtual SCSI channel 817 */ 818 megaraid_mbox_setup_device_map(adapter); 819 820 // If the firmware supports random deletion, update the device id map 821 if (megaraid_mbox_support_random_del(adapter)) { 822 823 // Change the logical drives numbers in device_ids array one 824 // slot in device_ids is reserved for target id, that's why 825 // "<=" below 826 for (i = 0; i <= MAX_LOGICAL_DRIVES_40LD; i++) { 827 adapter->device_ids[adapter->max_channel][i] += 0x80; 828 } 829 adapter->device_ids[adapter->max_channel][adapter->init_id] = 830 0xFF; 831 832 raid_dev->random_del_supported = 1; 833 } 834 835 /* 836 * find out the maximum number of scatter-gather elements supported by 837 * this firmware 838 */ 839 adapter->sglen = megaraid_mbox_get_max_sg(adapter); 840 841 // enumerate RAID and SCSI channels so that all devices on SCSI 842 // channels can later be exported, including disk devices 843 megaraid_mbox_enum_raid_scsi(adapter); 844 845 /* 846 * Other parameters required by upper layer 847 * 848 * maximum number of sectors per IO command 849 */ 850 adapter->max_sectors = megaraid_max_sectors; 851 852 /* 853 * number of queued commands per LUN. 854 */ 855 adapter->cmd_per_lun = megaraid_cmd_per_lun; 856 857 /* 858 * Allocate resources required to issue FW calls, when sysfs is 859 * accessed 860 */ 861 if (megaraid_sysfs_alloc_resources(adapter) != 0) 862 goto out_free_irq; 863 864 // Set the DMA mask to 64-bit. All supported controllers as capable of 865 // DMA in this range 866 pci_read_config_dword(adapter->pdev, PCI_CONF_AMISIG64, &magic64); 867 868 if (((magic64 == HBA_SIGNATURE_64_BIT) && 869 ((adapter->pdev->subsystem_device != 870 PCI_SUBSYS_ID_MEGARAID_SATA_150_6) && 871 (adapter->pdev->subsystem_device != 872 PCI_SUBSYS_ID_MEGARAID_SATA_150_4))) || 873 (adapter->pdev->vendor == PCI_VENDOR_ID_LSI_LOGIC && 874 adapter->pdev->device == PCI_DEVICE_ID_VERDE) || 875 (adapter->pdev->vendor == PCI_VENDOR_ID_LSI_LOGIC && 876 adapter->pdev->device == PCI_DEVICE_ID_DOBSON) || 877 (adapter->pdev->vendor == PCI_VENDOR_ID_LSI_LOGIC && 878 adapter->pdev->device == PCI_DEVICE_ID_LINDSAY) || 879 (adapter->pdev->vendor == PCI_VENDOR_ID_DELL && 880 adapter->pdev->device == PCI_DEVICE_ID_PERC4_DI_EVERGLADES) || 881 (adapter->pdev->vendor == PCI_VENDOR_ID_DELL && 882 adapter->pdev->device == PCI_DEVICE_ID_PERC4E_DI_KOBUK)) { 883 if (pci_set_dma_mask(adapter->pdev, DMA_BIT_MASK(64))) { 884 con_log(CL_ANN, (KERN_WARNING 885 "megaraid: DMA mask for 64-bit failed\n")); 886 887 if (pci_set_dma_mask (adapter->pdev, DMA_BIT_MASK(32))) { 888 con_log(CL_ANN, (KERN_WARNING 889 "megaraid: 32-bit DMA mask failed\n")); 890 goto out_free_sysfs_res; 891 } 892 } 893 } 894 895 // setup tasklet for DPC 896 tasklet_init(&adapter->dpc_h, megaraid_mbox_dpc, 897 (unsigned long)adapter); 898 899 con_log(CL_DLEVEL1, (KERN_INFO 900 "megaraid mbox hba successfully initialized\n")); 901 902 return 0; 903 904 out_free_sysfs_res: 905 megaraid_sysfs_free_resources(adapter); 906 out_free_irq: 907 free_irq(adapter->irq, adapter); 908 out_alloc_cmds: 909 megaraid_free_cmd_packets(adapter); 910 out_iounmap: 911 iounmap(raid_dev->baseaddr); 912 out_release_regions: 913 pci_release_regions(pdev); 914 out_free_raid_dev: 915 kfree(raid_dev); 916 917 return -1; 918 } 919 920 921 /** 922 * megaraid_fini_mbox - undo controller initialization 923 * @adapter : our soft state 924 */ 925 static void 926 megaraid_fini_mbox(adapter_t *adapter) 927 { 928 mraid_device_t *raid_dev = ADAP2RAIDDEV(adapter); 929 930 // flush all caches 931 megaraid_mbox_flush_cache(adapter); 932 933 tasklet_kill(&adapter->dpc_h); 934 935 megaraid_sysfs_free_resources(adapter); 936 937 megaraid_free_cmd_packets(adapter); 938 939 free_irq(adapter->irq, adapter); 940 941 iounmap(raid_dev->baseaddr); 942 943 pci_release_regions(adapter->pdev); 944 945 kfree(raid_dev); 946 947 return; 948 } 949 950 951 /** 952 * megaraid_alloc_cmd_packets - allocate shared mailbox 953 * @adapter : soft state of the raid controller 954 * 955 * Allocate and align the shared mailbox. This maibox is used to issue 956 * all the commands. For IO based controllers, the mailbox is also registered 957 * with the FW. Allocate memory for all commands as well. 958 * This is our big allocator. 959 */ 960 static int 961 megaraid_alloc_cmd_packets(adapter_t *adapter) 962 { 963 mraid_device_t *raid_dev = ADAP2RAIDDEV(adapter); 964 struct pci_dev *pdev; 965 unsigned long align; 966 scb_t *scb; 967 mbox_ccb_t *ccb; 968 struct mraid_pci_blk *epthru_pci_blk; 969 struct mraid_pci_blk *sg_pci_blk; 970 struct mraid_pci_blk *mbox_pci_blk; 971 int i; 972 973 pdev = adapter->pdev; 974 975 /* 976 * Setup the mailbox 977 * Allocate the common 16-byte aligned memory for the handshake 978 * mailbox. 979 */ 980 raid_dev->una_mbox64 = pci_zalloc_consistent(adapter->pdev, 981 sizeof(mbox64_t), 982 &raid_dev->una_mbox64_dma); 983 984 if (!raid_dev->una_mbox64) { 985 con_log(CL_ANN, (KERN_WARNING 986 "megaraid: out of memory, %s %d\n", __func__, 987 __LINE__)); 988 return -1; 989 } 990 991 /* 992 * Align the mailbox at 16-byte boundary 993 */ 994 raid_dev->mbox = &raid_dev->una_mbox64->mbox32; 995 996 raid_dev->mbox = (mbox_t *)((((unsigned long)raid_dev->mbox) + 15) & 997 (~0UL ^ 0xFUL)); 998 999 raid_dev->mbox64 = (mbox64_t *)(((unsigned long)raid_dev->mbox) - 8); 1000 1001 align = ((void *)raid_dev->mbox - 1002 ((void *)&raid_dev->una_mbox64->mbox32)); 1003 1004 raid_dev->mbox_dma = (unsigned long)raid_dev->una_mbox64_dma + 8 + 1005 align; 1006 1007 // Allocate memory for commands issued internally 1008 adapter->ibuf = pci_zalloc_consistent(pdev, MBOX_IBUF_SIZE, 1009 &adapter->ibuf_dma_h); 1010 if (!adapter->ibuf) { 1011 1012 con_log(CL_ANN, (KERN_WARNING 1013 "megaraid: out of memory, %s %d\n", __func__, 1014 __LINE__)); 1015 1016 goto out_free_common_mbox; 1017 } 1018 1019 // Allocate memory for our SCSI Command Blocks and their associated 1020 // memory 1021 1022 /* 1023 * Allocate memory for the base list of scb. Later allocate memory for 1024 * CCBs and embedded components of each CCB and point the pointers in 1025 * scb to the allocated components 1026 * NOTE: The code to allocate SCB will be duplicated in all the LLD 1027 * since the calling routine does not yet know the number of available 1028 * commands. 1029 */ 1030 adapter->kscb_list = kcalloc(MBOX_MAX_SCSI_CMDS, sizeof(scb_t), GFP_KERNEL); 1031 1032 if (adapter->kscb_list == NULL) { 1033 con_log(CL_ANN, (KERN_WARNING 1034 "megaraid: out of memory, %s %d\n", __func__, 1035 __LINE__)); 1036 goto out_free_ibuf; 1037 } 1038 1039 // memory allocation for our command packets 1040 if (megaraid_mbox_setup_dma_pools(adapter) != 0) { 1041 con_log(CL_ANN, (KERN_WARNING 1042 "megaraid: out of memory, %s %d\n", __func__, 1043 __LINE__)); 1044 goto out_free_scb_list; 1045 } 1046 1047 // Adjust the scb pointers and link in the free pool 1048 epthru_pci_blk = raid_dev->epthru_pool; 1049 sg_pci_blk = raid_dev->sg_pool; 1050 mbox_pci_blk = raid_dev->mbox_pool; 1051 1052 for (i = 0; i < MBOX_MAX_SCSI_CMDS; i++) { 1053 scb = adapter->kscb_list + i; 1054 ccb = raid_dev->ccb_list + i; 1055 1056 ccb->mbox = (mbox_t *)(mbox_pci_blk[i].vaddr + 16); 1057 ccb->raw_mbox = (uint8_t *)ccb->mbox; 1058 ccb->mbox64 = (mbox64_t *)(mbox_pci_blk[i].vaddr + 8); 1059 ccb->mbox_dma_h = (unsigned long)mbox_pci_blk[i].dma_addr + 16; 1060 1061 // make sure the mailbox is aligned properly 1062 if (ccb->mbox_dma_h & 0x0F) { 1063 con_log(CL_ANN, (KERN_CRIT 1064 "megaraid mbox: not aligned on 16-bytes\n")); 1065 1066 goto out_teardown_dma_pools; 1067 } 1068 1069 ccb->epthru = (mraid_epassthru_t *) 1070 epthru_pci_blk[i].vaddr; 1071 ccb->epthru_dma_h = epthru_pci_blk[i].dma_addr; 1072 ccb->pthru = (mraid_passthru_t *)ccb->epthru; 1073 ccb->pthru_dma_h = ccb->epthru_dma_h; 1074 1075 1076 ccb->sgl64 = (mbox_sgl64 *)sg_pci_blk[i].vaddr; 1077 ccb->sgl_dma_h = sg_pci_blk[i].dma_addr; 1078 ccb->sgl32 = (mbox_sgl32 *)ccb->sgl64; 1079 1080 scb->ccb = (caddr_t)ccb; 1081 scb->gp = 0; 1082 1083 scb->sno = i; // command index 1084 1085 scb->scp = NULL; 1086 scb->state = SCB_FREE; 1087 scb->dma_direction = PCI_DMA_NONE; 1088 scb->dma_type = MRAID_DMA_NONE; 1089 scb->dev_channel = -1; 1090 scb->dev_target = -1; 1091 1092 // put scb in the free pool 1093 list_add_tail(&scb->list, &adapter->kscb_pool); 1094 } 1095 1096 return 0; 1097 1098 out_teardown_dma_pools: 1099 megaraid_mbox_teardown_dma_pools(adapter); 1100 out_free_scb_list: 1101 kfree(adapter->kscb_list); 1102 out_free_ibuf: 1103 pci_free_consistent(pdev, MBOX_IBUF_SIZE, (void *)adapter->ibuf, 1104 adapter->ibuf_dma_h); 1105 out_free_common_mbox: 1106 pci_free_consistent(adapter->pdev, sizeof(mbox64_t), 1107 (caddr_t)raid_dev->una_mbox64, raid_dev->una_mbox64_dma); 1108 1109 return -1; 1110 } 1111 1112 1113 /** 1114 * megaraid_free_cmd_packets - free memory 1115 * @adapter : soft state of the raid controller 1116 * 1117 * Release memory resources allocated for commands. 1118 */ 1119 static void 1120 megaraid_free_cmd_packets(adapter_t *adapter) 1121 { 1122 mraid_device_t *raid_dev = ADAP2RAIDDEV(adapter); 1123 1124 megaraid_mbox_teardown_dma_pools(adapter); 1125 1126 kfree(adapter->kscb_list); 1127 1128 pci_free_consistent(adapter->pdev, MBOX_IBUF_SIZE, 1129 (void *)adapter->ibuf, adapter->ibuf_dma_h); 1130 1131 pci_free_consistent(adapter->pdev, sizeof(mbox64_t), 1132 (caddr_t)raid_dev->una_mbox64, raid_dev->una_mbox64_dma); 1133 return; 1134 } 1135 1136 1137 /** 1138 * megaraid_mbox_setup_dma_pools - setup dma pool for command packets 1139 * @adapter : HBA soft state 1140 * 1141 * Setup the dma pools for mailbox, passthru and extended passthru structures, 1142 * and scatter-gather lists. 1143 */ 1144 static int 1145 megaraid_mbox_setup_dma_pools(adapter_t *adapter) 1146 { 1147 mraid_device_t *raid_dev = ADAP2RAIDDEV(adapter); 1148 struct mraid_pci_blk *epthru_pci_blk; 1149 struct mraid_pci_blk *sg_pci_blk; 1150 struct mraid_pci_blk *mbox_pci_blk; 1151 int i; 1152 1153 1154 1155 // Allocate memory for 16-bytes aligned mailboxes 1156 raid_dev->mbox_pool_handle = pci_pool_create("megaraid mbox pool", 1157 adapter->pdev, 1158 sizeof(mbox64_t) + 16, 1159 16, 0); 1160 1161 if (raid_dev->mbox_pool_handle == NULL) { 1162 goto fail_setup_dma_pool; 1163 } 1164 1165 mbox_pci_blk = raid_dev->mbox_pool; 1166 for (i = 0; i < MBOX_MAX_SCSI_CMDS; i++) { 1167 mbox_pci_blk[i].vaddr = pci_pool_alloc( 1168 raid_dev->mbox_pool_handle, 1169 GFP_KERNEL, 1170 &mbox_pci_blk[i].dma_addr); 1171 if (!mbox_pci_blk[i].vaddr) { 1172 goto fail_setup_dma_pool; 1173 } 1174 } 1175 1176 /* 1177 * Allocate memory for each embedded passthru strucuture pointer 1178 * Request for a 128 bytes aligned structure for each passthru command 1179 * structure 1180 * Since passthru and extended passthru commands are exclusive, they 1181 * share common memory pool. Passthru structures piggyback on memory 1182 * allocted to extended passthru since passthru is smaller of the two 1183 */ 1184 raid_dev->epthru_pool_handle = pci_pool_create("megaraid mbox pthru", 1185 adapter->pdev, sizeof(mraid_epassthru_t), 128, 0); 1186 1187 if (raid_dev->epthru_pool_handle == NULL) { 1188 goto fail_setup_dma_pool; 1189 } 1190 1191 epthru_pci_blk = raid_dev->epthru_pool; 1192 for (i = 0; i < MBOX_MAX_SCSI_CMDS; i++) { 1193 epthru_pci_blk[i].vaddr = pci_pool_alloc( 1194 raid_dev->epthru_pool_handle, 1195 GFP_KERNEL, 1196 &epthru_pci_blk[i].dma_addr); 1197 if (!epthru_pci_blk[i].vaddr) { 1198 goto fail_setup_dma_pool; 1199 } 1200 } 1201 1202 1203 // Allocate memory for each scatter-gather list. Request for 512 bytes 1204 // alignment for each sg list 1205 raid_dev->sg_pool_handle = pci_pool_create("megaraid mbox sg", 1206 adapter->pdev, 1207 sizeof(mbox_sgl64) * MBOX_MAX_SG_SIZE, 1208 512, 0); 1209 1210 if (raid_dev->sg_pool_handle == NULL) { 1211 goto fail_setup_dma_pool; 1212 } 1213 1214 sg_pci_blk = raid_dev->sg_pool; 1215 for (i = 0; i < MBOX_MAX_SCSI_CMDS; i++) { 1216 sg_pci_blk[i].vaddr = pci_pool_alloc( 1217 raid_dev->sg_pool_handle, 1218 GFP_KERNEL, 1219 &sg_pci_blk[i].dma_addr); 1220 if (!sg_pci_blk[i].vaddr) { 1221 goto fail_setup_dma_pool; 1222 } 1223 } 1224 1225 return 0; 1226 1227 fail_setup_dma_pool: 1228 megaraid_mbox_teardown_dma_pools(adapter); 1229 return -1; 1230 } 1231 1232 1233 /** 1234 * megaraid_mbox_teardown_dma_pools - teardown dma pools for command packets 1235 * @adapter : HBA soft state 1236 * 1237 * Teardown the dma pool for mailbox, passthru and extended passthru 1238 * structures, and scatter-gather lists. 1239 */ 1240 static void 1241 megaraid_mbox_teardown_dma_pools(adapter_t *adapter) 1242 { 1243 mraid_device_t *raid_dev = ADAP2RAIDDEV(adapter); 1244 struct mraid_pci_blk *epthru_pci_blk; 1245 struct mraid_pci_blk *sg_pci_blk; 1246 struct mraid_pci_blk *mbox_pci_blk; 1247 int i; 1248 1249 1250 sg_pci_blk = raid_dev->sg_pool; 1251 for (i = 0; i < MBOX_MAX_SCSI_CMDS && sg_pci_blk[i].vaddr; i++) { 1252 pci_pool_free(raid_dev->sg_pool_handle, sg_pci_blk[i].vaddr, 1253 sg_pci_blk[i].dma_addr); 1254 } 1255 if (raid_dev->sg_pool_handle) 1256 pci_pool_destroy(raid_dev->sg_pool_handle); 1257 1258 1259 epthru_pci_blk = raid_dev->epthru_pool; 1260 for (i = 0; i < MBOX_MAX_SCSI_CMDS && epthru_pci_blk[i].vaddr; i++) { 1261 pci_pool_free(raid_dev->epthru_pool_handle, 1262 epthru_pci_blk[i].vaddr, epthru_pci_blk[i].dma_addr); 1263 } 1264 if (raid_dev->epthru_pool_handle) 1265 pci_pool_destroy(raid_dev->epthru_pool_handle); 1266 1267 1268 mbox_pci_blk = raid_dev->mbox_pool; 1269 for (i = 0; i < MBOX_MAX_SCSI_CMDS && mbox_pci_blk[i].vaddr; i++) { 1270 pci_pool_free(raid_dev->mbox_pool_handle, 1271 mbox_pci_blk[i].vaddr, mbox_pci_blk[i].dma_addr); 1272 } 1273 if (raid_dev->mbox_pool_handle) 1274 pci_pool_destroy(raid_dev->mbox_pool_handle); 1275 1276 return; 1277 } 1278 1279 1280 /** 1281 * megaraid_alloc_scb - detach and return a scb from the free list 1282 * @adapter : controller's soft state 1283 * @scp : pointer to the scsi command to be executed 1284 * 1285 * Return the scb from the head of the free list. %NULL if there are none 1286 * available. 1287 */ 1288 static scb_t * 1289 megaraid_alloc_scb(adapter_t *adapter, struct scsi_cmnd *scp) 1290 { 1291 struct list_head *head = &adapter->kscb_pool; 1292 scb_t *scb = NULL; 1293 unsigned long flags; 1294 1295 // detach scb from free pool 1296 spin_lock_irqsave(SCSI_FREE_LIST_LOCK(adapter), flags); 1297 1298 if (list_empty(head)) { 1299 spin_unlock_irqrestore(SCSI_FREE_LIST_LOCK(adapter), flags); 1300 return NULL; 1301 } 1302 1303 scb = list_entry(head->next, scb_t, list); 1304 list_del_init(&scb->list); 1305 1306 spin_unlock_irqrestore(SCSI_FREE_LIST_LOCK(adapter), flags); 1307 1308 scb->state = SCB_ACTIVE; 1309 scb->scp = scp; 1310 scb->dma_type = MRAID_DMA_NONE; 1311 1312 return scb; 1313 } 1314 1315 1316 /** 1317 * megaraid_dealloc_scb - return the scb to the free pool 1318 * @adapter : controller's soft state 1319 * @scb : scb to be freed 1320 * 1321 * Return the scb back to the free list of scbs. The caller must 'flush' the 1322 * SCB before calling us. E.g., performing pci_unamp and/or pci_sync etc. 1323 * NOTE NOTE: Make sure the scb is not on any list before calling this 1324 * routine. 1325 */ 1326 static inline void 1327 megaraid_dealloc_scb(adapter_t *adapter, scb_t *scb) 1328 { 1329 unsigned long flags; 1330 1331 // put scb in the free pool 1332 scb->state = SCB_FREE; 1333 scb->scp = NULL; 1334 spin_lock_irqsave(SCSI_FREE_LIST_LOCK(adapter), flags); 1335 1336 list_add(&scb->list, &adapter->kscb_pool); 1337 1338 spin_unlock_irqrestore(SCSI_FREE_LIST_LOCK(adapter), flags); 1339 1340 return; 1341 } 1342 1343 1344 /** 1345 * megaraid_mbox_mksgl - make the scatter-gather list 1346 * @adapter : controller's soft state 1347 * @scb : scsi control block 1348 * 1349 * Prepare the scatter-gather list. 1350 */ 1351 static int 1352 megaraid_mbox_mksgl(adapter_t *adapter, scb_t *scb) 1353 { 1354 struct scatterlist *sgl; 1355 mbox_ccb_t *ccb; 1356 struct scsi_cmnd *scp; 1357 int sgcnt; 1358 int i; 1359 1360 1361 scp = scb->scp; 1362 ccb = (mbox_ccb_t *)scb->ccb; 1363 1364 sgcnt = scsi_dma_map(scp); 1365 BUG_ON(sgcnt < 0 || sgcnt > adapter->sglen); 1366 1367 // no mapping required if no data to be transferred 1368 if (!sgcnt) 1369 return 0; 1370 1371 scb->dma_type = MRAID_DMA_WSG; 1372 1373 scsi_for_each_sg(scp, sgl, sgcnt, i) { 1374 ccb->sgl64[i].address = sg_dma_address(sgl); 1375 ccb->sgl64[i].length = sg_dma_len(sgl); 1376 } 1377 1378 // Return count of SG nodes 1379 return sgcnt; 1380 } 1381 1382 1383 /** 1384 * mbox_post_cmd - issue a mailbox command 1385 * @adapter : controller's soft state 1386 * @scb : command to be issued 1387 * 1388 * Post the command to the controller if mailbox is available. 1389 */ 1390 static int 1391 mbox_post_cmd(adapter_t *adapter, scb_t *scb) 1392 { 1393 mraid_device_t *raid_dev = ADAP2RAIDDEV(adapter); 1394 mbox64_t *mbox64; 1395 mbox_t *mbox; 1396 mbox_ccb_t *ccb; 1397 unsigned long flags; 1398 unsigned int i = 0; 1399 1400 1401 ccb = (mbox_ccb_t *)scb->ccb; 1402 mbox = raid_dev->mbox; 1403 mbox64 = raid_dev->mbox64; 1404 1405 /* 1406 * Check for busy mailbox. If it is, return failure - the caller 1407 * should retry later. 1408 */ 1409 spin_lock_irqsave(MAILBOX_LOCK(raid_dev), flags); 1410 1411 if (unlikely(mbox->busy)) { 1412 do { 1413 udelay(1); 1414 i++; 1415 rmb(); 1416 } while(mbox->busy && (i < max_mbox_busy_wait)); 1417 1418 if (mbox->busy) { 1419 1420 spin_unlock_irqrestore(MAILBOX_LOCK(raid_dev), flags); 1421 1422 return -1; 1423 } 1424 } 1425 1426 1427 // Copy this command's mailbox data into "adapter's" mailbox 1428 memcpy((caddr_t)mbox64, (caddr_t)ccb->mbox64, 22); 1429 mbox->cmdid = scb->sno; 1430 1431 adapter->outstanding_cmds++; 1432 1433 if (scb->dma_direction == PCI_DMA_TODEVICE) 1434 pci_dma_sync_sg_for_device(adapter->pdev, 1435 scsi_sglist(scb->scp), 1436 scsi_sg_count(scb->scp), 1437 PCI_DMA_TODEVICE); 1438 1439 mbox->busy = 1; // Set busy 1440 mbox->poll = 0; 1441 mbox->ack = 0; 1442 wmb(); 1443 1444 WRINDOOR(raid_dev, raid_dev->mbox_dma | 0x1); 1445 1446 spin_unlock_irqrestore(MAILBOX_LOCK(raid_dev), flags); 1447 1448 return 0; 1449 } 1450 1451 1452 /** 1453 * megaraid_queue_command - generic queue entry point for all LLDs 1454 * @scp : pointer to the scsi command to be executed 1455 * @done : callback routine to be called after the cmd has be completed 1456 * 1457 * Queue entry point for mailbox based controllers. 1458 */ 1459 static int 1460 megaraid_queue_command_lck(struct scsi_cmnd *scp, void (*done)(struct scsi_cmnd *)) 1461 { 1462 adapter_t *adapter; 1463 scb_t *scb; 1464 int if_busy; 1465 1466 adapter = SCP2ADAPTER(scp); 1467 scp->scsi_done = done; 1468 scp->result = 0; 1469 1470 /* 1471 * Allocate and build a SCB request 1472 * if_busy flag will be set if megaraid_mbox_build_cmd() command could 1473 * not allocate scb. We will return non-zero status in that case. 1474 * NOTE: scb can be null even though certain commands completed 1475 * successfully, e.g., MODE_SENSE and TEST_UNIT_READY, it would 1476 * return 0 in that case, and we would do the callback right away. 1477 */ 1478 if_busy = 0; 1479 scb = megaraid_mbox_build_cmd(adapter, scp, &if_busy); 1480 if (!scb) { // command already completed 1481 done(scp); 1482 return 0; 1483 } 1484 1485 megaraid_mbox_runpendq(adapter, scb); 1486 return if_busy; 1487 } 1488 1489 static DEF_SCSI_QCMD(megaraid_queue_command) 1490 1491 /** 1492 * megaraid_mbox_build_cmd - transform the mid-layer scsi commands 1493 * @adapter : controller's soft state 1494 * @scp : mid-layer scsi command pointer 1495 * @busy : set if request could not be completed because of lack of 1496 * resources 1497 * 1498 * Transform the mid-layer scsi command to megaraid firmware lingua. 1499 * Convert the command issued by mid-layer to format understood by megaraid 1500 * firmware. We also complete certain commands without sending them to firmware. 1501 */ 1502 static scb_t * 1503 megaraid_mbox_build_cmd(adapter_t *adapter, struct scsi_cmnd *scp, int *busy) 1504 { 1505 mraid_device_t *rdev = ADAP2RAIDDEV(adapter); 1506 int channel; 1507 int target; 1508 int islogical; 1509 mbox_ccb_t *ccb; 1510 mraid_passthru_t *pthru; 1511 mbox64_t *mbox64; 1512 mbox_t *mbox; 1513 scb_t *scb; 1514 char skip[] = "skipping"; 1515 char scan[] = "scanning"; 1516 char *ss; 1517 1518 1519 /* 1520 * Get the appropriate device map for the device this command is 1521 * intended for 1522 */ 1523 MRAID_GET_DEVICE_MAP(adapter, scp, channel, target, islogical); 1524 1525 /* 1526 * Logical drive commands 1527 */ 1528 if (islogical) { 1529 switch (scp->cmnd[0]) { 1530 case TEST_UNIT_READY: 1531 /* 1532 * Do we support clustering and is the support enabled 1533 * If no, return success always 1534 */ 1535 if (!adapter->ha) { 1536 scp->result = (DID_OK << 16); 1537 return NULL; 1538 } 1539 1540 if (!(scb = megaraid_alloc_scb(adapter, scp))) { 1541 scp->result = (DID_ERROR << 16); 1542 *busy = 1; 1543 return NULL; 1544 } 1545 1546 scb->dma_direction = scp->sc_data_direction; 1547 scb->dev_channel = 0xFF; 1548 scb->dev_target = target; 1549 ccb = (mbox_ccb_t *)scb->ccb; 1550 1551 /* 1552 * The command id will be provided by the command 1553 * issuance routine 1554 */ 1555 ccb->raw_mbox[0] = CLUSTER_CMD; 1556 ccb->raw_mbox[2] = RESERVATION_STATUS; 1557 ccb->raw_mbox[3] = target; 1558 1559 return scb; 1560 1561 case MODE_SENSE: 1562 { 1563 struct scatterlist *sgl; 1564 caddr_t vaddr; 1565 1566 sgl = scsi_sglist(scp); 1567 if (sg_page(sgl)) { 1568 vaddr = (caddr_t) sg_virt(&sgl[0]); 1569 1570 memset(vaddr, 0, scp->cmnd[4]); 1571 } 1572 else { 1573 con_log(CL_ANN, (KERN_WARNING 1574 "megaraid mailbox: invalid sg:%d\n", 1575 __LINE__)); 1576 } 1577 } 1578 scp->result = (DID_OK << 16); 1579 return NULL; 1580 1581 case INQUIRY: 1582 /* 1583 * Display the channel scan for logical drives 1584 * Do not display scan for a channel if already done. 1585 */ 1586 if (!(rdev->last_disp & (1L << SCP2CHANNEL(scp)))) { 1587 1588 con_log(CL_ANN, (KERN_INFO 1589 "scsi[%d]: scanning scsi channel %d", 1590 adapter->host->host_no, 1591 SCP2CHANNEL(scp))); 1592 1593 con_log(CL_ANN, ( 1594 " [virtual] for logical drives\n")); 1595 1596 rdev->last_disp |= (1L << SCP2CHANNEL(scp)); 1597 } 1598 1599 if (scp->cmnd[1] & MEGA_SCSI_INQ_EVPD) { 1600 scp->sense_buffer[0] = 0x70; 1601 scp->sense_buffer[2] = ILLEGAL_REQUEST; 1602 scp->sense_buffer[12] = MEGA_INVALID_FIELD_IN_CDB; 1603 scp->result = CHECK_CONDITION << 1; 1604 return NULL; 1605 } 1606 1607 /* Fall through */ 1608 1609 case READ_CAPACITY: 1610 /* 1611 * Do not allow LUN > 0 for logical drives and 1612 * requests for more than 40 logical drives 1613 */ 1614 if (SCP2LUN(scp)) { 1615 scp->result = (DID_BAD_TARGET << 16); 1616 return NULL; 1617 } 1618 if ((target % 0x80) >= MAX_LOGICAL_DRIVES_40LD) { 1619 scp->result = (DID_BAD_TARGET << 16); 1620 return NULL; 1621 } 1622 1623 1624 /* Allocate a SCB and initialize passthru */ 1625 if (!(scb = megaraid_alloc_scb(adapter, scp))) { 1626 scp->result = (DID_ERROR << 16); 1627 *busy = 1; 1628 return NULL; 1629 } 1630 1631 ccb = (mbox_ccb_t *)scb->ccb; 1632 scb->dev_channel = 0xFF; 1633 scb->dev_target = target; 1634 pthru = ccb->pthru; 1635 mbox = ccb->mbox; 1636 mbox64 = ccb->mbox64; 1637 1638 pthru->timeout = 0; 1639 pthru->ars = 1; 1640 pthru->reqsenselen = 14; 1641 pthru->islogical = 1; 1642 pthru->logdrv = target; 1643 pthru->cdblen = scp->cmd_len; 1644 memcpy(pthru->cdb, scp->cmnd, scp->cmd_len); 1645 1646 mbox->cmd = MBOXCMD_PASSTHRU64; 1647 scb->dma_direction = scp->sc_data_direction; 1648 1649 pthru->dataxferlen = scsi_bufflen(scp); 1650 pthru->dataxferaddr = ccb->sgl_dma_h; 1651 pthru->numsge = megaraid_mbox_mksgl(adapter, 1652 scb); 1653 1654 mbox->xferaddr = 0xFFFFFFFF; 1655 mbox64->xferaddr_lo = (uint32_t )ccb->pthru_dma_h; 1656 mbox64->xferaddr_hi = 0; 1657 1658 return scb; 1659 1660 case READ_6: 1661 case WRITE_6: 1662 case READ_10: 1663 case WRITE_10: 1664 case READ_12: 1665 case WRITE_12: 1666 1667 /* 1668 * Allocate a SCB and initialize mailbox 1669 */ 1670 if (!(scb = megaraid_alloc_scb(adapter, scp))) { 1671 scp->result = (DID_ERROR << 16); 1672 *busy = 1; 1673 return NULL; 1674 } 1675 ccb = (mbox_ccb_t *)scb->ccb; 1676 scb->dev_channel = 0xFF; 1677 scb->dev_target = target; 1678 mbox = ccb->mbox; 1679 mbox64 = ccb->mbox64; 1680 mbox->logdrv = target; 1681 1682 /* 1683 * A little HACK: 2nd bit is zero for all scsi read 1684 * commands and is set for all scsi write commands 1685 */ 1686 mbox->cmd = (scp->cmnd[0] & 0x02) ? MBOXCMD_LWRITE64: 1687 MBOXCMD_LREAD64 ; 1688 1689 /* 1690 * 6-byte READ(0x08) or WRITE(0x0A) cdb 1691 */ 1692 if (scp->cmd_len == 6) { 1693 mbox->numsectors = (uint32_t)scp->cmnd[4]; 1694 mbox->lba = 1695 ((uint32_t)scp->cmnd[1] << 16) | 1696 ((uint32_t)scp->cmnd[2] << 8) | 1697 (uint32_t)scp->cmnd[3]; 1698 1699 mbox->lba &= 0x1FFFFF; 1700 } 1701 1702 /* 1703 * 10-byte READ(0x28) or WRITE(0x2A) cdb 1704 */ 1705 else if (scp->cmd_len == 10) { 1706 mbox->numsectors = 1707 (uint32_t)scp->cmnd[8] | 1708 ((uint32_t)scp->cmnd[7] << 8); 1709 mbox->lba = 1710 ((uint32_t)scp->cmnd[2] << 24) | 1711 ((uint32_t)scp->cmnd[3] << 16) | 1712 ((uint32_t)scp->cmnd[4] << 8) | 1713 (uint32_t)scp->cmnd[5]; 1714 } 1715 1716 /* 1717 * 12-byte READ(0xA8) or WRITE(0xAA) cdb 1718 */ 1719 else if (scp->cmd_len == 12) { 1720 mbox->lba = 1721 ((uint32_t)scp->cmnd[2] << 24) | 1722 ((uint32_t)scp->cmnd[3] << 16) | 1723 ((uint32_t)scp->cmnd[4] << 8) | 1724 (uint32_t)scp->cmnd[5]; 1725 1726 mbox->numsectors = 1727 ((uint32_t)scp->cmnd[6] << 24) | 1728 ((uint32_t)scp->cmnd[7] << 16) | 1729 ((uint32_t)scp->cmnd[8] << 8) | 1730 (uint32_t)scp->cmnd[9]; 1731 } 1732 else { 1733 con_log(CL_ANN, (KERN_WARNING 1734 "megaraid: unsupported CDB length\n")); 1735 1736 megaraid_dealloc_scb(adapter, scb); 1737 1738 scp->result = (DID_ERROR << 16); 1739 return NULL; 1740 } 1741 1742 scb->dma_direction = scp->sc_data_direction; 1743 1744 // Calculate Scatter-Gather info 1745 mbox64->xferaddr_lo = (uint32_t )ccb->sgl_dma_h; 1746 mbox->numsge = megaraid_mbox_mksgl(adapter, 1747 scb); 1748 mbox->xferaddr = 0xFFFFFFFF; 1749 mbox64->xferaddr_hi = 0; 1750 1751 return scb; 1752 1753 case RESERVE: 1754 case RELEASE: 1755 /* 1756 * Do we support clustering and is the support enabled 1757 */ 1758 if (!adapter->ha) { 1759 scp->result = (DID_BAD_TARGET << 16); 1760 return NULL; 1761 } 1762 1763 /* 1764 * Allocate a SCB and initialize mailbox 1765 */ 1766 if (!(scb = megaraid_alloc_scb(adapter, scp))) { 1767 scp->result = (DID_ERROR << 16); 1768 *busy = 1; 1769 return NULL; 1770 } 1771 1772 ccb = (mbox_ccb_t *)scb->ccb; 1773 scb->dev_channel = 0xFF; 1774 scb->dev_target = target; 1775 ccb->raw_mbox[0] = CLUSTER_CMD; 1776 ccb->raw_mbox[2] = (scp->cmnd[0] == RESERVE) ? 1777 RESERVE_LD : RELEASE_LD; 1778 1779 ccb->raw_mbox[3] = target; 1780 scb->dma_direction = scp->sc_data_direction; 1781 1782 return scb; 1783 1784 default: 1785 scp->result = (DID_BAD_TARGET << 16); 1786 return NULL; 1787 } 1788 } 1789 else { // Passthru device commands 1790 1791 // Do not allow access to target id > 15 or LUN > 7 1792 if (target > 15 || SCP2LUN(scp) > 7) { 1793 scp->result = (DID_BAD_TARGET << 16); 1794 return NULL; 1795 } 1796 1797 // if fast load option was set and scan for last device is 1798 // over, reset the fast_load flag so that during a possible 1799 // next scan, devices can be made available 1800 if (rdev->fast_load && (target == 15) && 1801 (SCP2CHANNEL(scp) == adapter->max_channel -1)) { 1802 1803 con_log(CL_ANN, (KERN_INFO 1804 "megaraid[%d]: physical device scan re-enabled\n", 1805 adapter->host->host_no)); 1806 rdev->fast_load = 0; 1807 } 1808 1809 /* 1810 * Display the channel scan for physical devices 1811 */ 1812 if (!(rdev->last_disp & (1L << SCP2CHANNEL(scp)))) { 1813 1814 ss = rdev->fast_load ? skip : scan; 1815 1816 con_log(CL_ANN, (KERN_INFO 1817 "scsi[%d]: %s scsi channel %d [Phy %d]", 1818 adapter->host->host_no, ss, SCP2CHANNEL(scp), 1819 channel)); 1820 1821 con_log(CL_ANN, ( 1822 " for non-raid devices\n")); 1823 1824 rdev->last_disp |= (1L << SCP2CHANNEL(scp)); 1825 } 1826 1827 // disable channel sweep if fast load option given 1828 if (rdev->fast_load) { 1829 scp->result = (DID_BAD_TARGET << 16); 1830 return NULL; 1831 } 1832 1833 // Allocate a SCB and initialize passthru 1834 if (!(scb = megaraid_alloc_scb(adapter, scp))) { 1835 scp->result = (DID_ERROR << 16); 1836 *busy = 1; 1837 return NULL; 1838 } 1839 1840 ccb = (mbox_ccb_t *)scb->ccb; 1841 scb->dev_channel = channel; 1842 scb->dev_target = target; 1843 scb->dma_direction = scp->sc_data_direction; 1844 mbox = ccb->mbox; 1845 mbox64 = ccb->mbox64; 1846 1847 // Does this firmware support extended CDBs 1848 if (adapter->max_cdb_sz == 16) { 1849 mbox->cmd = MBOXCMD_EXTPTHRU; 1850 1851 megaraid_mbox_prepare_epthru(adapter, scb, scp); 1852 1853 mbox64->xferaddr_lo = (uint32_t)ccb->epthru_dma_h; 1854 mbox64->xferaddr_hi = 0; 1855 mbox->xferaddr = 0xFFFFFFFF; 1856 } 1857 else { 1858 mbox->cmd = MBOXCMD_PASSTHRU64; 1859 1860 megaraid_mbox_prepare_pthru(adapter, scb, scp); 1861 1862 mbox64->xferaddr_lo = (uint32_t)ccb->pthru_dma_h; 1863 mbox64->xferaddr_hi = 0; 1864 mbox->xferaddr = 0xFFFFFFFF; 1865 } 1866 return scb; 1867 } 1868 1869 // NOT REACHED 1870 } 1871 1872 1873 /** 1874 * megaraid_mbox_runpendq - execute commands queued in the pending queue 1875 * @adapter : controller's soft state 1876 * @scb_q : SCB to be queued in the pending list 1877 * 1878 * Scan the pending list for commands which are not yet issued and try to 1879 * post to the controller. The SCB can be a null pointer, which would indicate 1880 * no SCB to be queue, just try to execute the ones in the pending list. 1881 * 1882 * NOTE: We do not actually traverse the pending list. The SCBs are plucked 1883 * out from the head of the pending list. If it is successfully issued, the 1884 * next SCB is at the head now. 1885 */ 1886 static void 1887 megaraid_mbox_runpendq(adapter_t *adapter, scb_t *scb_q) 1888 { 1889 scb_t *scb; 1890 unsigned long flags; 1891 1892 spin_lock_irqsave(PENDING_LIST_LOCK(adapter), flags); 1893 1894 if (scb_q) { 1895 scb_q->state = SCB_PENDQ; 1896 list_add_tail(&scb_q->list, &adapter->pend_list); 1897 } 1898 1899 // if the adapter in not in quiescent mode, post the commands to FW 1900 if (adapter->quiescent) { 1901 spin_unlock_irqrestore(PENDING_LIST_LOCK(adapter), flags); 1902 return; 1903 } 1904 1905 while (!list_empty(&adapter->pend_list)) { 1906 1907 assert_spin_locked(PENDING_LIST_LOCK(adapter)); 1908 1909 scb = list_entry(adapter->pend_list.next, scb_t, list); 1910 1911 // remove the scb from the pending list and try to 1912 // issue. If we are unable to issue it, put back in 1913 // the pending list and return 1914 1915 list_del_init(&scb->list); 1916 1917 spin_unlock_irqrestore(PENDING_LIST_LOCK(adapter), flags); 1918 1919 // if mailbox was busy, return SCB back to pending 1920 // list. Make sure to add at the head, since that's 1921 // where it would have been removed from 1922 1923 scb->state = SCB_ISSUED; 1924 1925 if (mbox_post_cmd(adapter, scb) != 0) { 1926 1927 spin_lock_irqsave(PENDING_LIST_LOCK(adapter), flags); 1928 1929 scb->state = SCB_PENDQ; 1930 1931 list_add(&scb->list, &adapter->pend_list); 1932 1933 spin_unlock_irqrestore(PENDING_LIST_LOCK(adapter), 1934 flags); 1935 1936 return; 1937 } 1938 1939 spin_lock_irqsave(PENDING_LIST_LOCK(adapter), flags); 1940 } 1941 1942 spin_unlock_irqrestore(PENDING_LIST_LOCK(adapter), flags); 1943 1944 1945 return; 1946 } 1947 1948 1949 /** 1950 * megaraid_mbox_prepare_pthru - prepare a command for physical devices 1951 * @adapter : pointer to controller's soft state 1952 * @scb : scsi control block 1953 * @scp : scsi command from the mid-layer 1954 * 1955 * Prepare a command for the scsi physical devices. 1956 */ 1957 static void 1958 megaraid_mbox_prepare_pthru(adapter_t *adapter, scb_t *scb, 1959 struct scsi_cmnd *scp) 1960 { 1961 mbox_ccb_t *ccb; 1962 mraid_passthru_t *pthru; 1963 uint8_t channel; 1964 uint8_t target; 1965 1966 ccb = (mbox_ccb_t *)scb->ccb; 1967 pthru = ccb->pthru; 1968 channel = scb->dev_channel; 1969 target = scb->dev_target; 1970 1971 // 0=6sec, 1=60sec, 2=10min, 3=3hrs, 4=NO timeout 1972 pthru->timeout = 4; 1973 pthru->ars = 1; 1974 pthru->islogical = 0; 1975 pthru->channel = 0; 1976 pthru->target = (channel << 4) | target; 1977 pthru->logdrv = SCP2LUN(scp); 1978 pthru->reqsenselen = 14; 1979 pthru->cdblen = scp->cmd_len; 1980 1981 memcpy(pthru->cdb, scp->cmnd, scp->cmd_len); 1982 1983 if (scsi_bufflen(scp)) { 1984 pthru->dataxferlen = scsi_bufflen(scp); 1985 pthru->dataxferaddr = ccb->sgl_dma_h; 1986 pthru->numsge = megaraid_mbox_mksgl(adapter, scb); 1987 } 1988 else { 1989 pthru->dataxferaddr = 0; 1990 pthru->dataxferlen = 0; 1991 pthru->numsge = 0; 1992 } 1993 return; 1994 } 1995 1996 1997 /** 1998 * megaraid_mbox_prepare_epthru - prepare a command for physical devices 1999 * @adapter : pointer to controller's soft state 2000 * @scb : scsi control block 2001 * @scp : scsi command from the mid-layer 2002 * 2003 * Prepare a command for the scsi physical devices. This routine prepares 2004 * commands for devices which can take extended CDBs (>10 bytes). 2005 */ 2006 static void 2007 megaraid_mbox_prepare_epthru(adapter_t *adapter, scb_t *scb, 2008 struct scsi_cmnd *scp) 2009 { 2010 mbox_ccb_t *ccb; 2011 mraid_epassthru_t *epthru; 2012 uint8_t channel; 2013 uint8_t target; 2014 2015 ccb = (mbox_ccb_t *)scb->ccb; 2016 epthru = ccb->epthru; 2017 channel = scb->dev_channel; 2018 target = scb->dev_target; 2019 2020 // 0=6sec, 1=60sec, 2=10min, 3=3hrs, 4=NO timeout 2021 epthru->timeout = 4; 2022 epthru->ars = 1; 2023 epthru->islogical = 0; 2024 epthru->channel = 0; 2025 epthru->target = (channel << 4) | target; 2026 epthru->logdrv = SCP2LUN(scp); 2027 epthru->reqsenselen = 14; 2028 epthru->cdblen = scp->cmd_len; 2029 2030 memcpy(epthru->cdb, scp->cmnd, scp->cmd_len); 2031 2032 if (scsi_bufflen(scp)) { 2033 epthru->dataxferlen = scsi_bufflen(scp); 2034 epthru->dataxferaddr = ccb->sgl_dma_h; 2035 epthru->numsge = megaraid_mbox_mksgl(adapter, scb); 2036 } 2037 else { 2038 epthru->dataxferaddr = 0; 2039 epthru->dataxferlen = 0; 2040 epthru->numsge = 0; 2041 } 2042 return; 2043 } 2044 2045 2046 /** 2047 * megaraid_ack_sequence - interrupt ack sequence for memory mapped HBAs 2048 * @adapter : controller's soft state 2049 * 2050 * Interrupt acknowledgement sequence for memory mapped HBAs. Find out the 2051 * completed command and put them on the completed list for later processing. 2052 * 2053 * Returns: 1 if the interrupt is valid, 0 otherwise 2054 */ 2055 static int 2056 megaraid_ack_sequence(adapter_t *adapter) 2057 { 2058 mraid_device_t *raid_dev = ADAP2RAIDDEV(adapter); 2059 mbox_t *mbox; 2060 scb_t *scb; 2061 uint8_t nstatus; 2062 uint8_t completed[MBOX_MAX_FIRMWARE_STATUS]; 2063 struct list_head clist; 2064 int handled; 2065 uint32_t dword; 2066 unsigned long flags; 2067 int i, j; 2068 2069 2070 mbox = raid_dev->mbox; 2071 2072 // move the SCBs from the firmware completed array to our local list 2073 INIT_LIST_HEAD(&clist); 2074 2075 // loop till F/W has more commands for us to complete 2076 handled = 0; 2077 spin_lock_irqsave(MAILBOX_LOCK(raid_dev), flags); 2078 do { 2079 /* 2080 * Check if a valid interrupt is pending. If found, force the 2081 * interrupt line low. 2082 */ 2083 dword = RDOUTDOOR(raid_dev); 2084 if (dword != 0x10001234) break; 2085 2086 handled = 1; 2087 2088 WROUTDOOR(raid_dev, 0x10001234); 2089 2090 nstatus = 0; 2091 // wait for valid numstatus to post 2092 for (i = 0; i < 0xFFFFF; i++) { 2093 if (mbox->numstatus != 0xFF) { 2094 nstatus = mbox->numstatus; 2095 break; 2096 } 2097 rmb(); 2098 } 2099 mbox->numstatus = 0xFF; 2100 2101 adapter->outstanding_cmds -= nstatus; 2102 2103 for (i = 0; i < nstatus; i++) { 2104 2105 // wait for valid command index to post 2106 for (j = 0; j < 0xFFFFF; j++) { 2107 if (mbox->completed[i] != 0xFF) break; 2108 rmb(); 2109 } 2110 completed[i] = mbox->completed[i]; 2111 mbox->completed[i] = 0xFF; 2112 2113 if (completed[i] == 0xFF) { 2114 con_log(CL_ANN, (KERN_CRIT 2115 "megaraid: command posting timed out\n")); 2116 2117 BUG(); 2118 continue; 2119 } 2120 2121 // Get SCB associated with this command id 2122 if (completed[i] >= MBOX_MAX_SCSI_CMDS) { 2123 // a cmm command 2124 scb = adapter->uscb_list + (completed[i] - 2125 MBOX_MAX_SCSI_CMDS); 2126 } 2127 else { 2128 // an os command 2129 scb = adapter->kscb_list + completed[i]; 2130 } 2131 2132 scb->status = mbox->status; 2133 list_add_tail(&scb->list, &clist); 2134 } 2135 2136 // Acknowledge interrupt 2137 WRINDOOR(raid_dev, 0x02); 2138 2139 } while(1); 2140 2141 spin_unlock_irqrestore(MAILBOX_LOCK(raid_dev), flags); 2142 2143 2144 // put the completed commands in the completed list. DPC would 2145 // complete these commands later 2146 spin_lock_irqsave(COMPLETED_LIST_LOCK(adapter), flags); 2147 2148 list_splice(&clist, &adapter->completed_list); 2149 2150 spin_unlock_irqrestore(COMPLETED_LIST_LOCK(adapter), flags); 2151 2152 2153 // schedule the DPC if there is some work for it 2154 if (handled) 2155 tasklet_schedule(&adapter->dpc_h); 2156 2157 return handled; 2158 } 2159 2160 2161 /** 2162 * megaraid_isr - isr for memory based mailbox based controllers 2163 * @irq : irq 2164 * @devp : pointer to our soft state 2165 * 2166 * Interrupt service routine for memory-mapped mailbox controllers. 2167 */ 2168 static irqreturn_t 2169 megaraid_isr(int irq, void *devp) 2170 { 2171 adapter_t *adapter = devp; 2172 int handled; 2173 2174 handled = megaraid_ack_sequence(adapter); 2175 2176 /* Loop through any pending requests */ 2177 if (!adapter->quiescent) { 2178 megaraid_mbox_runpendq(adapter, NULL); 2179 } 2180 2181 return IRQ_RETVAL(handled); 2182 } 2183 2184 2185 /** 2186 * megaraid_mbox_sync_scb - sync kernel buffers 2187 * @adapter : controller's soft state 2188 * @scb : pointer to the resource packet 2189 * 2190 * DMA sync if required. 2191 */ 2192 static void 2193 megaraid_mbox_sync_scb(adapter_t *adapter, scb_t *scb) 2194 { 2195 mbox_ccb_t *ccb; 2196 2197 ccb = (mbox_ccb_t *)scb->ccb; 2198 2199 if (scb->dma_direction == PCI_DMA_FROMDEVICE) 2200 pci_dma_sync_sg_for_cpu(adapter->pdev, 2201 scsi_sglist(scb->scp), 2202 scsi_sg_count(scb->scp), 2203 PCI_DMA_FROMDEVICE); 2204 2205 scsi_dma_unmap(scb->scp); 2206 return; 2207 } 2208 2209 2210 /** 2211 * megaraid_mbox_dpc - the tasklet to complete the commands from completed list 2212 * @devp : pointer to HBA soft state 2213 * 2214 * Pick up the commands from the completed list and send back to the owners. 2215 * This is a reentrant function and does not assume any locks are held while 2216 * it is being called. 2217 */ 2218 static void 2219 megaraid_mbox_dpc(unsigned long devp) 2220 { 2221 adapter_t *adapter = (adapter_t *)devp; 2222 mraid_device_t *raid_dev; 2223 struct list_head clist; 2224 struct scatterlist *sgl; 2225 scb_t *scb; 2226 scb_t *tmp; 2227 struct scsi_cmnd *scp; 2228 mraid_passthru_t *pthru; 2229 mraid_epassthru_t *epthru; 2230 mbox_ccb_t *ccb; 2231 int islogical; 2232 int pdev_index; 2233 int pdev_state; 2234 mbox_t *mbox; 2235 unsigned long flags; 2236 uint8_t c; 2237 int status; 2238 uioc_t *kioc; 2239 2240 2241 if (!adapter) return; 2242 2243 raid_dev = ADAP2RAIDDEV(adapter); 2244 2245 // move the SCBs from the completed list to our local list 2246 INIT_LIST_HEAD(&clist); 2247 2248 spin_lock_irqsave(COMPLETED_LIST_LOCK(adapter), flags); 2249 2250 list_splice_init(&adapter->completed_list, &clist); 2251 2252 spin_unlock_irqrestore(COMPLETED_LIST_LOCK(adapter), flags); 2253 2254 2255 list_for_each_entry_safe(scb, tmp, &clist, list) { 2256 2257 status = scb->status; 2258 scp = scb->scp; 2259 ccb = (mbox_ccb_t *)scb->ccb; 2260 pthru = ccb->pthru; 2261 epthru = ccb->epthru; 2262 mbox = ccb->mbox; 2263 2264 // Make sure f/w has completed a valid command 2265 if (scb->state != SCB_ISSUED) { 2266 con_log(CL_ANN, (KERN_CRIT 2267 "megaraid critical err: invalid command %d:%d:%p\n", 2268 scb->sno, scb->state, scp)); 2269 BUG(); 2270 continue; // Must never happen! 2271 } 2272 2273 // check for the management command and complete it right away 2274 if (scb->sno >= MBOX_MAX_SCSI_CMDS) { 2275 scb->state = SCB_FREE; 2276 scb->status = status; 2277 2278 // remove from local clist 2279 list_del_init(&scb->list); 2280 2281 kioc = (uioc_t *)scb->gp; 2282 kioc->status = 0; 2283 2284 megaraid_mbox_mm_done(adapter, scb); 2285 2286 continue; 2287 } 2288 2289 // Was an abort issued for this command earlier 2290 if (scb->state & SCB_ABORT) { 2291 con_log(CL_ANN, (KERN_NOTICE 2292 "megaraid: aborted cmd [%x] completed\n", 2293 scb->sno)); 2294 } 2295 2296 /* 2297 * If the inquiry came of a disk drive which is not part of 2298 * any RAID array, expose it to the kernel. For this to be 2299 * enabled, user must set the "megaraid_expose_unconf_disks" 2300 * flag to 1 by specifying it on module parameter list. 2301 * This would enable data migration off drives from other 2302 * configurations. 2303 */ 2304 islogical = MRAID_IS_LOGICAL(adapter, scp); 2305 if (scp->cmnd[0] == INQUIRY && status == 0 && islogical == 0 2306 && IS_RAID_CH(raid_dev, scb->dev_channel)) { 2307 2308 sgl = scsi_sglist(scp); 2309 if (sg_page(sgl)) { 2310 c = *(unsigned char *) sg_virt(&sgl[0]); 2311 } else { 2312 con_log(CL_ANN, (KERN_WARNING 2313 "megaraid mailbox: invalid sg:%d\n", 2314 __LINE__)); 2315 c = 0; 2316 } 2317 2318 if ((c & 0x1F ) == TYPE_DISK) { 2319 pdev_index = (scb->dev_channel * 16) + 2320 scb->dev_target; 2321 pdev_state = 2322 raid_dev->pdrv_state[pdev_index] & 0x0F; 2323 2324 if (pdev_state == PDRV_ONLINE || 2325 pdev_state == PDRV_FAILED || 2326 pdev_state == PDRV_RBLD || 2327 pdev_state == PDRV_HOTSPARE || 2328 megaraid_expose_unconf_disks == 0) { 2329 2330 status = 0xF0; 2331 } 2332 } 2333 } 2334 2335 // Convert MegaRAID status to Linux error code 2336 switch (status) { 2337 2338 case 0x00: 2339 2340 scp->result = (DID_OK << 16); 2341 break; 2342 2343 case 0x02: 2344 2345 /* set sense_buffer and result fields */ 2346 if (mbox->cmd == MBOXCMD_PASSTHRU || 2347 mbox->cmd == MBOXCMD_PASSTHRU64) { 2348 2349 memcpy(scp->sense_buffer, pthru->reqsensearea, 2350 14); 2351 2352 scp->result = DRIVER_SENSE << 24 | 2353 DID_OK << 16 | CHECK_CONDITION << 1; 2354 } 2355 else { 2356 if (mbox->cmd == MBOXCMD_EXTPTHRU) { 2357 2358 memcpy(scp->sense_buffer, 2359 epthru->reqsensearea, 14); 2360 2361 scp->result = DRIVER_SENSE << 24 | 2362 DID_OK << 16 | 2363 CHECK_CONDITION << 1; 2364 } else { 2365 scp->sense_buffer[0] = 0x70; 2366 scp->sense_buffer[2] = ABORTED_COMMAND; 2367 scp->result = CHECK_CONDITION << 1; 2368 } 2369 } 2370 break; 2371 2372 case 0x08: 2373 2374 scp->result = DID_BUS_BUSY << 16 | status; 2375 break; 2376 2377 default: 2378 2379 /* 2380 * If TEST_UNIT_READY fails, we know RESERVATION_STATUS 2381 * failed 2382 */ 2383 if (scp->cmnd[0] == TEST_UNIT_READY) { 2384 scp->result = DID_ERROR << 16 | 2385 RESERVATION_CONFLICT << 1; 2386 } 2387 else 2388 /* 2389 * Error code returned is 1 if Reserve or Release 2390 * failed or the input parameter is invalid 2391 */ 2392 if (status == 1 && (scp->cmnd[0] == RESERVE || 2393 scp->cmnd[0] == RELEASE)) { 2394 2395 scp->result = DID_ERROR << 16 | 2396 RESERVATION_CONFLICT << 1; 2397 } 2398 else { 2399 scp->result = DID_BAD_TARGET << 16 | status; 2400 } 2401 } 2402 2403 // print a debug message for all failed commands 2404 if (status) { 2405 megaraid_mbox_display_scb(adapter, scb); 2406 } 2407 2408 // Free our internal resources and call the mid-layer callback 2409 // routine 2410 megaraid_mbox_sync_scb(adapter, scb); 2411 2412 // remove from local clist 2413 list_del_init(&scb->list); 2414 2415 // put back in free list 2416 megaraid_dealloc_scb(adapter, scb); 2417 2418 // send the scsi packet back to kernel 2419 scp->scsi_done(scp); 2420 } 2421 2422 return; 2423 } 2424 2425 2426 /** 2427 * megaraid_abort_handler - abort the scsi command 2428 * @scp : command to be aborted 2429 * 2430 * Abort a previous SCSI request. Only commands on the pending list can be 2431 * aborted. All the commands issued to the F/W must complete. 2432 **/ 2433 static int 2434 megaraid_abort_handler(struct scsi_cmnd *scp) 2435 { 2436 adapter_t *adapter; 2437 mraid_device_t *raid_dev; 2438 scb_t *scb; 2439 scb_t *tmp; 2440 int found; 2441 unsigned long flags; 2442 int i; 2443 2444 2445 adapter = SCP2ADAPTER(scp); 2446 raid_dev = ADAP2RAIDDEV(adapter); 2447 2448 con_log(CL_ANN, (KERN_WARNING 2449 "megaraid: aborting cmd=%x <c=%d t=%d l=%d>\n", 2450 scp->cmnd[0], SCP2CHANNEL(scp), 2451 SCP2TARGET(scp), SCP2LUN(scp))); 2452 2453 // If FW has stopped responding, simply return failure 2454 if (raid_dev->hw_error) { 2455 con_log(CL_ANN, (KERN_NOTICE 2456 "megaraid: hw error, not aborting\n")); 2457 return FAILED; 2458 } 2459 2460 // There might a race here, where the command was completed by the 2461 // firmware and now it is on the completed list. Before we could 2462 // complete the command to the kernel in dpc, the abort came. 2463 // Find out if this is the case to avoid the race. 2464 scb = NULL; 2465 spin_lock_irqsave(COMPLETED_LIST_LOCK(adapter), flags); 2466 list_for_each_entry_safe(scb, tmp, &adapter->completed_list, list) { 2467 2468 if (scb->scp == scp) { // Found command 2469 2470 list_del_init(&scb->list); // from completed list 2471 2472 con_log(CL_ANN, (KERN_WARNING 2473 "megaraid: %d[%d:%d], abort from completed list\n", 2474 scb->sno, scb->dev_channel, scb->dev_target)); 2475 2476 scp->result = (DID_ABORT << 16); 2477 scp->scsi_done(scp); 2478 2479 megaraid_dealloc_scb(adapter, scb); 2480 2481 spin_unlock_irqrestore(COMPLETED_LIST_LOCK(adapter), 2482 flags); 2483 2484 return SUCCESS; 2485 } 2486 } 2487 spin_unlock_irqrestore(COMPLETED_LIST_LOCK(adapter), flags); 2488 2489 2490 // Find out if this command is still on the pending list. If it is and 2491 // was never issued, abort and return success. If the command is owned 2492 // by the firmware, we must wait for it to complete by the FW. 2493 spin_lock_irqsave(PENDING_LIST_LOCK(adapter), flags); 2494 list_for_each_entry_safe(scb, tmp, &adapter->pend_list, list) { 2495 2496 if (scb->scp == scp) { // Found command 2497 2498 list_del_init(&scb->list); // from pending list 2499 2500 ASSERT(!(scb->state & SCB_ISSUED)); 2501 2502 con_log(CL_ANN, (KERN_WARNING 2503 "megaraid abort: [%d:%d], driver owner\n", 2504 scb->dev_channel, scb->dev_target)); 2505 2506 scp->result = (DID_ABORT << 16); 2507 scp->scsi_done(scp); 2508 2509 megaraid_dealloc_scb(adapter, scb); 2510 2511 spin_unlock_irqrestore(PENDING_LIST_LOCK(adapter), 2512 flags); 2513 2514 return SUCCESS; 2515 } 2516 } 2517 spin_unlock_irqrestore(PENDING_LIST_LOCK(adapter), flags); 2518 2519 2520 // Check do we even own this command, in which case this would be 2521 // owned by the firmware. The only way to locate the FW scb is to 2522 // traverse through the list of all SCB, since driver does not 2523 // maintain these SCBs on any list 2524 found = 0; 2525 spin_lock_irq(&adapter->lock); 2526 for (i = 0; i < MBOX_MAX_SCSI_CMDS; i++) { 2527 scb = adapter->kscb_list + i; 2528 2529 if (scb->scp == scp) { 2530 2531 found = 1; 2532 2533 if (!(scb->state & SCB_ISSUED)) { 2534 con_log(CL_ANN, (KERN_WARNING 2535 "megaraid abort: %d[%d:%d], invalid state\n", 2536 scb->sno, scb->dev_channel, scb->dev_target)); 2537 BUG(); 2538 } 2539 else { 2540 con_log(CL_ANN, (KERN_WARNING 2541 "megaraid abort: %d[%d:%d], fw owner\n", 2542 scb->sno, scb->dev_channel, scb->dev_target)); 2543 } 2544 } 2545 } 2546 spin_unlock_irq(&adapter->lock); 2547 2548 if (!found) { 2549 con_log(CL_ANN, (KERN_WARNING "megaraid abort: do now own\n")); 2550 2551 // FIXME: Should there be a callback for this command? 2552 return SUCCESS; 2553 } 2554 2555 // We cannot actually abort a command owned by firmware, return 2556 // failure and wait for reset. In host reset handler, we will find out 2557 // if the HBA is still live 2558 return FAILED; 2559 } 2560 2561 /** 2562 * megaraid_reset_handler - device reset handler for mailbox based driver 2563 * @scp : reference command 2564 * 2565 * Reset handler for the mailbox based controller. First try to find out if 2566 * the FW is still live, in which case the outstanding commands counter mut go 2567 * down to 0. If that happens, also issue the reservation reset command to 2568 * relinquish (possible) reservations on the logical drives connected to this 2569 * host. 2570 **/ 2571 static int 2572 megaraid_reset_handler(struct scsi_cmnd *scp) 2573 { 2574 adapter_t *adapter; 2575 scb_t *scb; 2576 scb_t *tmp; 2577 mraid_device_t *raid_dev; 2578 unsigned long flags; 2579 uint8_t raw_mbox[sizeof(mbox_t)]; 2580 int rval; 2581 int recovery_window; 2582 int recovering; 2583 int i; 2584 uioc_t *kioc; 2585 2586 adapter = SCP2ADAPTER(scp); 2587 raid_dev = ADAP2RAIDDEV(adapter); 2588 2589 // return failure if adapter is not responding 2590 if (raid_dev->hw_error) { 2591 con_log(CL_ANN, (KERN_NOTICE 2592 "megaraid: hw error, cannot reset\n")); 2593 return FAILED; 2594 } 2595 2596 2597 // Under exceptional conditions, FW can take up to 3 minutes to 2598 // complete command processing. Wait for additional 2 minutes for the 2599 // pending commands counter to go down to 0. If it doesn't, let the 2600 // controller be marked offline 2601 // Also, reset all the commands currently owned by the driver 2602 spin_lock_irqsave(PENDING_LIST_LOCK(adapter), flags); 2603 list_for_each_entry_safe(scb, tmp, &adapter->pend_list, list) { 2604 list_del_init(&scb->list); // from pending list 2605 2606 if (scb->sno >= MBOX_MAX_SCSI_CMDS) { 2607 con_log(CL_ANN, (KERN_WARNING 2608 "megaraid: IOCTL packet with %d[%d:%d] being reset\n", 2609 scb->sno, scb->dev_channel, scb->dev_target)); 2610 2611 scb->status = -1; 2612 2613 kioc = (uioc_t *)scb->gp; 2614 kioc->status = -EFAULT; 2615 2616 megaraid_mbox_mm_done(adapter, scb); 2617 } else { 2618 if (scb->scp == scp) { // Found command 2619 con_log(CL_ANN, (KERN_WARNING 2620 "megaraid: %d[%d:%d], reset from pending list\n", 2621 scb->sno, scb->dev_channel, scb->dev_target)); 2622 } else { 2623 con_log(CL_ANN, (KERN_WARNING 2624 "megaraid: IO packet with %d[%d:%d] being reset\n", 2625 scb->sno, scb->dev_channel, scb->dev_target)); 2626 } 2627 2628 scb->scp->result = (DID_RESET << 16); 2629 scb->scp->scsi_done(scb->scp); 2630 2631 megaraid_dealloc_scb(adapter, scb); 2632 } 2633 } 2634 spin_unlock_irqrestore(PENDING_LIST_LOCK(adapter), flags); 2635 2636 if (adapter->outstanding_cmds) { 2637 con_log(CL_ANN, (KERN_NOTICE 2638 "megaraid: %d outstanding commands. Max wait %d sec\n", 2639 adapter->outstanding_cmds, 2640 (MBOX_RESET_WAIT + MBOX_RESET_EXT_WAIT))); 2641 } 2642 2643 recovery_window = MBOX_RESET_WAIT + MBOX_RESET_EXT_WAIT; 2644 2645 recovering = adapter->outstanding_cmds; 2646 2647 for (i = 0; i < recovery_window; i++) { 2648 2649 megaraid_ack_sequence(adapter); 2650 2651 // print a message once every 5 seconds only 2652 if (!(i % 5)) { 2653 con_log(CL_ANN, ( 2654 "megaraid mbox: Wait for %d commands to complete:%d\n", 2655 adapter->outstanding_cmds, 2656 (MBOX_RESET_WAIT + MBOX_RESET_EXT_WAIT) - i)); 2657 } 2658 2659 // bailout if no recovery happened in reset time 2660 if (adapter->outstanding_cmds == 0) { 2661 break; 2662 } 2663 2664 msleep(1000); 2665 } 2666 2667 spin_lock(&adapter->lock); 2668 2669 // If still outstanding commands, bail out 2670 if (adapter->outstanding_cmds) { 2671 con_log(CL_ANN, (KERN_WARNING 2672 "megaraid mbox: critical hardware error!\n")); 2673 2674 raid_dev->hw_error = 1; 2675 2676 rval = FAILED; 2677 goto out; 2678 } 2679 else { 2680 con_log(CL_ANN, (KERN_NOTICE 2681 "megaraid mbox: reset sequence completed successfully\n")); 2682 } 2683 2684 2685 // If the controller supports clustering, reset reservations 2686 if (!adapter->ha) { 2687 rval = SUCCESS; 2688 goto out; 2689 } 2690 2691 // clear reservations if any 2692 raw_mbox[0] = CLUSTER_CMD; 2693 raw_mbox[2] = RESET_RESERVATIONS; 2694 2695 rval = SUCCESS; 2696 if (mbox_post_sync_cmd_fast(adapter, raw_mbox) == 0) { 2697 con_log(CL_ANN, 2698 (KERN_INFO "megaraid: reservation reset\n")); 2699 } 2700 else { 2701 rval = FAILED; 2702 con_log(CL_ANN, (KERN_WARNING 2703 "megaraid: reservation reset failed\n")); 2704 } 2705 2706 out: 2707 spin_unlock(&adapter->lock); 2708 return rval; 2709 } 2710 2711 /* 2712 * START: internal commands library 2713 * 2714 * This section of the driver has the common routine used by the driver and 2715 * also has all the FW routines 2716 */ 2717 2718 /** 2719 * mbox_post_sync_cmd() - blocking command to the mailbox based controllers 2720 * @adapter : controller's soft state 2721 * @raw_mbox : the mailbox 2722 * 2723 * Issue a scb in synchronous and non-interrupt mode for mailbox based 2724 * controllers. 2725 */ 2726 static int 2727 mbox_post_sync_cmd(adapter_t *adapter, uint8_t raw_mbox[]) 2728 { 2729 mraid_device_t *raid_dev = ADAP2RAIDDEV(adapter); 2730 mbox64_t *mbox64; 2731 mbox_t *mbox; 2732 uint8_t status; 2733 int i; 2734 2735 2736 mbox64 = raid_dev->mbox64; 2737 mbox = raid_dev->mbox; 2738 2739 /* 2740 * Wait until mailbox is free 2741 */ 2742 if (megaraid_busywait_mbox(raid_dev) != 0) 2743 goto blocked_mailbox; 2744 2745 /* 2746 * Copy mailbox data into host structure 2747 */ 2748 memcpy((caddr_t)mbox, (caddr_t)raw_mbox, 16); 2749 mbox->cmdid = 0xFE; 2750 mbox->busy = 1; 2751 mbox->poll = 0; 2752 mbox->ack = 0; 2753 mbox->numstatus = 0xFF; 2754 mbox->status = 0xFF; 2755 2756 wmb(); 2757 WRINDOOR(raid_dev, raid_dev->mbox_dma | 0x1); 2758 2759 // wait for maximum 1 second for status to post. If the status is not 2760 // available within 1 second, assume FW is initializing and wait 2761 // for an extended amount of time 2762 if (mbox->numstatus == 0xFF) { // status not yet available 2763 udelay(25); 2764 2765 for (i = 0; mbox->numstatus == 0xFF && i < 1000; i++) { 2766 rmb(); 2767 msleep(1); 2768 } 2769 2770 2771 if (i == 1000) { 2772 con_log(CL_ANN, (KERN_NOTICE 2773 "megaraid mailbox: wait for FW to boot ")); 2774 2775 for (i = 0; (mbox->numstatus == 0xFF) && 2776 (i < MBOX_RESET_WAIT); i++) { 2777 rmb(); 2778 con_log(CL_ANN, ("\b\b\b\b\b[%03d]", 2779 MBOX_RESET_WAIT - i)); 2780 msleep(1000); 2781 } 2782 2783 if (i == MBOX_RESET_WAIT) { 2784 2785 con_log(CL_ANN, ( 2786 "\nmegaraid mailbox: status not available\n")); 2787 2788 return -1; 2789 } 2790 con_log(CL_ANN, ("\b\b\b\b\b[ok] \n")); 2791 } 2792 } 2793 2794 // wait for maximum 1 second for poll semaphore 2795 if (mbox->poll != 0x77) { 2796 udelay(25); 2797 2798 for (i = 0; (mbox->poll != 0x77) && (i < 1000); i++) { 2799 rmb(); 2800 msleep(1); 2801 } 2802 2803 if (i == 1000) { 2804 con_log(CL_ANN, (KERN_WARNING 2805 "megaraid mailbox: could not get poll semaphore\n")); 2806 return -1; 2807 } 2808 } 2809 2810 WRINDOOR(raid_dev, raid_dev->mbox_dma | 0x2); 2811 wmb(); 2812 2813 // wait for maximum 1 second for acknowledgement 2814 if (RDINDOOR(raid_dev) & 0x2) { 2815 udelay(25); 2816 2817 for (i = 0; (RDINDOOR(raid_dev) & 0x2) && (i < 1000); i++) { 2818 rmb(); 2819 msleep(1); 2820 } 2821 2822 if (i == 1000) { 2823 con_log(CL_ANN, (KERN_WARNING 2824 "megaraid mailbox: could not acknowledge\n")); 2825 return -1; 2826 } 2827 } 2828 mbox->poll = 0; 2829 mbox->ack = 0x77; 2830 2831 status = mbox->status; 2832 2833 // invalidate the completed command id array. After command 2834 // completion, firmware would write the valid id. 2835 mbox->numstatus = 0xFF; 2836 mbox->status = 0xFF; 2837 for (i = 0; i < MBOX_MAX_FIRMWARE_STATUS; i++) { 2838 mbox->completed[i] = 0xFF; 2839 } 2840 2841 return status; 2842 2843 blocked_mailbox: 2844 2845 con_log(CL_ANN, (KERN_WARNING "megaraid: blocked mailbox\n") ); 2846 return -1; 2847 } 2848 2849 2850 /** 2851 * mbox_post_sync_cmd_fast - blocking command to the mailbox based controllers 2852 * @adapter : controller's soft state 2853 * @raw_mbox : the mailbox 2854 * 2855 * Issue a scb in synchronous and non-interrupt mode for mailbox based 2856 * controllers. This is a faster version of the synchronous command and 2857 * therefore can be called in interrupt-context as well. 2858 */ 2859 static int 2860 mbox_post_sync_cmd_fast(adapter_t *adapter, uint8_t raw_mbox[]) 2861 { 2862 mraid_device_t *raid_dev = ADAP2RAIDDEV(adapter); 2863 mbox_t *mbox; 2864 long i; 2865 2866 2867 mbox = raid_dev->mbox; 2868 2869 // return immediately if the mailbox is busy 2870 if (mbox->busy) return -1; 2871 2872 // Copy mailbox data into host structure 2873 memcpy((caddr_t)mbox, (caddr_t)raw_mbox, 14); 2874 mbox->cmdid = 0xFE; 2875 mbox->busy = 1; 2876 mbox->poll = 0; 2877 mbox->ack = 0; 2878 mbox->numstatus = 0xFF; 2879 mbox->status = 0xFF; 2880 2881 wmb(); 2882 WRINDOOR(raid_dev, raid_dev->mbox_dma | 0x1); 2883 2884 for (i = 0; i < MBOX_SYNC_WAIT_CNT; i++) { 2885 if (mbox->numstatus != 0xFF) break; 2886 rmb(); 2887 udelay(MBOX_SYNC_DELAY_200); 2888 } 2889 2890 if (i == MBOX_SYNC_WAIT_CNT) { 2891 // We may need to re-calibrate the counter 2892 con_log(CL_ANN, (KERN_CRIT 2893 "megaraid: fast sync command timed out\n")); 2894 } 2895 2896 WRINDOOR(raid_dev, raid_dev->mbox_dma | 0x2); 2897 wmb(); 2898 2899 return mbox->status; 2900 } 2901 2902 2903 /** 2904 * megaraid_busywait_mbox() - Wait until the controller's mailbox is available 2905 * @raid_dev : RAID device (HBA) soft state 2906 * 2907 * Wait until the controller's mailbox is available to accept more commands. 2908 * Wait for at most 1 second. 2909 */ 2910 static int 2911 megaraid_busywait_mbox(mraid_device_t *raid_dev) 2912 { 2913 mbox_t *mbox = raid_dev->mbox; 2914 int i = 0; 2915 2916 if (mbox->busy) { 2917 udelay(25); 2918 for (i = 0; mbox->busy && i < 1000; i++) 2919 msleep(1); 2920 } 2921 2922 if (i < 1000) return 0; 2923 else return -1; 2924 } 2925 2926 2927 /** 2928 * megaraid_mbox_product_info - some static information about the controller 2929 * @adapter : our soft state 2930 * 2931 * Issue commands to the controller to grab some parameters required by our 2932 * caller. 2933 */ 2934 static int 2935 megaraid_mbox_product_info(adapter_t *adapter) 2936 { 2937 mraid_device_t *raid_dev = ADAP2RAIDDEV(adapter); 2938 mbox_t *mbox; 2939 uint8_t raw_mbox[sizeof(mbox_t)]; 2940 mraid_pinfo_t *pinfo; 2941 dma_addr_t pinfo_dma_h; 2942 mraid_inquiry3_t *mraid_inq3; 2943 int i; 2944 2945 2946 memset((caddr_t)raw_mbox, 0, sizeof(raw_mbox)); 2947 mbox = (mbox_t *)raw_mbox; 2948 2949 /* 2950 * Issue an ENQUIRY3 command to find out certain adapter parameters, 2951 * e.g., max channels, max commands etc. 2952 */ 2953 pinfo = pci_zalloc_consistent(adapter->pdev, sizeof(mraid_pinfo_t), 2954 &pinfo_dma_h); 2955 2956 if (pinfo == NULL) { 2957 con_log(CL_ANN, (KERN_WARNING 2958 "megaraid: out of memory, %s %d\n", __func__, 2959 __LINE__)); 2960 2961 return -1; 2962 } 2963 2964 mbox->xferaddr = (uint32_t)adapter->ibuf_dma_h; 2965 memset((void *)adapter->ibuf, 0, MBOX_IBUF_SIZE); 2966 2967 raw_mbox[0] = FC_NEW_CONFIG; 2968 raw_mbox[2] = NC_SUBOP_ENQUIRY3; 2969 raw_mbox[3] = ENQ3_GET_SOLICITED_FULL; 2970 2971 // Issue the command 2972 if (mbox_post_sync_cmd(adapter, raw_mbox) != 0) { 2973 2974 con_log(CL_ANN, (KERN_WARNING "megaraid: Inquiry3 failed\n")); 2975 2976 pci_free_consistent(adapter->pdev, sizeof(mraid_pinfo_t), 2977 pinfo, pinfo_dma_h); 2978 2979 return -1; 2980 } 2981 2982 /* 2983 * Collect information about state of each physical drive 2984 * attached to the controller. We will expose all the disks 2985 * which are not part of RAID 2986 */ 2987 mraid_inq3 = (mraid_inquiry3_t *)adapter->ibuf; 2988 for (i = 0; i < MBOX_MAX_PHYSICAL_DRIVES; i++) { 2989 raid_dev->pdrv_state[i] = mraid_inq3->pdrv_state[i]; 2990 } 2991 2992 /* 2993 * Get product info for information like number of channels, 2994 * maximum commands supported. 2995 */ 2996 memset((caddr_t)raw_mbox, 0, sizeof(raw_mbox)); 2997 mbox->xferaddr = (uint32_t)pinfo_dma_h; 2998 2999 raw_mbox[0] = FC_NEW_CONFIG; 3000 raw_mbox[2] = NC_SUBOP_PRODUCT_INFO; 3001 3002 if (mbox_post_sync_cmd(adapter, raw_mbox) != 0) { 3003 3004 con_log(CL_ANN, (KERN_WARNING 3005 "megaraid: product info failed\n")); 3006 3007 pci_free_consistent(adapter->pdev, sizeof(mraid_pinfo_t), 3008 pinfo, pinfo_dma_h); 3009 3010 return -1; 3011 } 3012 3013 /* 3014 * Setup some parameters for host, as required by our caller 3015 */ 3016 adapter->max_channel = pinfo->nchannels; 3017 3018 /* 3019 * we will export all the logical drives on a single channel. 3020 * Add 1 since inquires do not come for inititor ID 3021 */ 3022 adapter->max_target = MAX_LOGICAL_DRIVES_40LD + 1; 3023 adapter->max_lun = 8; // up to 8 LUNs for non-disk devices 3024 3025 /* 3026 * These are the maximum outstanding commands for the scsi-layer 3027 */ 3028 adapter->max_cmds = MBOX_MAX_SCSI_CMDS; 3029 3030 memset(adapter->fw_version, 0, VERSION_SIZE); 3031 memset(adapter->bios_version, 0, VERSION_SIZE); 3032 3033 memcpy(adapter->fw_version, pinfo->fw_version, 4); 3034 adapter->fw_version[4] = 0; 3035 3036 memcpy(adapter->bios_version, pinfo->bios_version, 4); 3037 adapter->bios_version[4] = 0; 3038 3039 con_log(CL_ANN, (KERN_NOTICE 3040 "megaraid: fw version:[%s] bios version:[%s]\n", 3041 adapter->fw_version, adapter->bios_version)); 3042 3043 pci_free_consistent(adapter->pdev, sizeof(mraid_pinfo_t), pinfo, 3044 pinfo_dma_h); 3045 3046 return 0; 3047 } 3048 3049 3050 3051 /** 3052 * megaraid_mbox_extended_cdb - check for support for extended CDBs 3053 * @adapter : soft state for the controller 3054 * 3055 * This routine check whether the controller in question supports extended 3056 * ( > 10 bytes ) CDBs. 3057 */ 3058 static int 3059 megaraid_mbox_extended_cdb(adapter_t *adapter) 3060 { 3061 mbox_t *mbox; 3062 uint8_t raw_mbox[sizeof(mbox_t)]; 3063 int rval; 3064 3065 mbox = (mbox_t *)raw_mbox; 3066 3067 memset((caddr_t)raw_mbox, 0, sizeof(raw_mbox)); 3068 mbox->xferaddr = (uint32_t)adapter->ibuf_dma_h; 3069 3070 memset((void *)adapter->ibuf, 0, MBOX_IBUF_SIZE); 3071 3072 raw_mbox[0] = MAIN_MISC_OPCODE; 3073 raw_mbox[2] = SUPPORT_EXT_CDB; 3074 3075 /* 3076 * Issue the command 3077 */ 3078 rval = 0; 3079 if (mbox_post_sync_cmd(adapter, raw_mbox) != 0) { 3080 rval = -1; 3081 } 3082 3083 return rval; 3084 } 3085 3086 3087 /** 3088 * megaraid_mbox_support_ha - Do we support clustering 3089 * @adapter : soft state for the controller 3090 * @init_id : ID of the initiator 3091 * 3092 * Determine if the firmware supports clustering and the ID of the initiator. 3093 */ 3094 static int 3095 megaraid_mbox_support_ha(adapter_t *adapter, uint16_t *init_id) 3096 { 3097 mbox_t *mbox; 3098 uint8_t raw_mbox[sizeof(mbox_t)]; 3099 int rval; 3100 3101 3102 mbox = (mbox_t *)raw_mbox; 3103 3104 memset((caddr_t)raw_mbox, 0, sizeof(raw_mbox)); 3105 3106 mbox->xferaddr = (uint32_t)adapter->ibuf_dma_h; 3107 3108 memset((void *)adapter->ibuf, 0, MBOX_IBUF_SIZE); 3109 3110 raw_mbox[0] = GET_TARGET_ID; 3111 3112 // Issue the command 3113 *init_id = 7; 3114 rval = -1; 3115 if (mbox_post_sync_cmd(adapter, raw_mbox) == 0) { 3116 3117 *init_id = *(uint8_t *)adapter->ibuf; 3118 3119 con_log(CL_ANN, (KERN_INFO 3120 "megaraid: cluster firmware, initiator ID: %d\n", 3121 *init_id)); 3122 3123 rval = 0; 3124 } 3125 3126 return rval; 3127 } 3128 3129 3130 /** 3131 * megaraid_mbox_support_random_del - Do we support random deletion 3132 * @adapter : soft state for the controller 3133 * 3134 * Determine if the firmware supports random deletion. 3135 * Return: 1 is operation supported, 0 otherwise 3136 */ 3137 static int 3138 megaraid_mbox_support_random_del(adapter_t *adapter) 3139 { 3140 mbox_t *mbox; 3141 uint8_t raw_mbox[sizeof(mbox_t)]; 3142 int rval; 3143 3144 /* 3145 * Newer firmware on Dell CERC expect a different 3146 * random deletion handling, so disable it. 3147 */ 3148 if (adapter->pdev->vendor == PCI_VENDOR_ID_AMI && 3149 adapter->pdev->device == PCI_DEVICE_ID_AMI_MEGARAID3 && 3150 adapter->pdev->subsystem_vendor == PCI_VENDOR_ID_DELL && 3151 adapter->pdev->subsystem_device == PCI_SUBSYS_ID_CERC_ATA100_4CH && 3152 (adapter->fw_version[0] > '6' || 3153 (adapter->fw_version[0] == '6' && 3154 adapter->fw_version[2] > '6') || 3155 (adapter->fw_version[0] == '6' 3156 && adapter->fw_version[2] == '6' 3157 && adapter->fw_version[3] > '1'))) { 3158 con_log(CL_DLEVEL1, ("megaraid: disable random deletion\n")); 3159 return 0; 3160 } 3161 3162 mbox = (mbox_t *)raw_mbox; 3163 3164 memset((caddr_t)raw_mbox, 0, sizeof(mbox_t)); 3165 3166 raw_mbox[0] = FC_DEL_LOGDRV; 3167 raw_mbox[2] = OP_SUP_DEL_LOGDRV; 3168 3169 // Issue the command 3170 rval = 0; 3171 if (mbox_post_sync_cmd(adapter, raw_mbox) == 0) { 3172 3173 con_log(CL_DLEVEL1, ("megaraid: supports random deletion\n")); 3174 3175 rval = 1; 3176 } 3177 3178 return rval; 3179 } 3180 3181 3182 /** 3183 * megaraid_mbox_get_max_sg - maximum sg elements supported by the firmware 3184 * @adapter : soft state for the controller 3185 * 3186 * Find out the maximum number of scatter-gather elements supported by the 3187 * firmware. 3188 */ 3189 static int 3190 megaraid_mbox_get_max_sg(adapter_t *adapter) 3191 { 3192 mbox_t *mbox; 3193 uint8_t raw_mbox[sizeof(mbox_t)]; 3194 int nsg; 3195 3196 3197 mbox = (mbox_t *)raw_mbox; 3198 3199 memset((caddr_t)raw_mbox, 0, sizeof(mbox_t)); 3200 3201 mbox->xferaddr = (uint32_t)adapter->ibuf_dma_h; 3202 3203 memset((void *)adapter->ibuf, 0, MBOX_IBUF_SIZE); 3204 3205 raw_mbox[0] = MAIN_MISC_OPCODE; 3206 raw_mbox[2] = GET_MAX_SG_SUPPORT; 3207 3208 // Issue the command 3209 if (mbox_post_sync_cmd(adapter, raw_mbox) == 0) { 3210 nsg = *(uint8_t *)adapter->ibuf; 3211 } 3212 else { 3213 nsg = MBOX_DEFAULT_SG_SIZE; 3214 } 3215 3216 if (nsg > MBOX_MAX_SG_SIZE) nsg = MBOX_MAX_SG_SIZE; 3217 3218 return nsg; 3219 } 3220 3221 3222 /** 3223 * megaraid_mbox_enum_raid_scsi - enumerate the RAID and SCSI channels 3224 * @adapter : soft state for the controller 3225 * 3226 * Enumerate the RAID and SCSI channels for ROMB platforms so that channels 3227 * can be exported as regular SCSI channels. 3228 */ 3229 static void 3230 megaraid_mbox_enum_raid_scsi(adapter_t *adapter) 3231 { 3232 mraid_device_t *raid_dev = ADAP2RAIDDEV(adapter); 3233 mbox_t *mbox; 3234 uint8_t raw_mbox[sizeof(mbox_t)]; 3235 3236 3237 mbox = (mbox_t *)raw_mbox; 3238 3239 memset((caddr_t)raw_mbox, 0, sizeof(mbox_t)); 3240 3241 mbox->xferaddr = (uint32_t)adapter->ibuf_dma_h; 3242 3243 memset((void *)adapter->ibuf, 0, MBOX_IBUF_SIZE); 3244 3245 raw_mbox[0] = CHNL_CLASS; 3246 raw_mbox[2] = GET_CHNL_CLASS; 3247 3248 // Issue the command. If the command fails, all channels are RAID 3249 // channels 3250 raid_dev->channel_class = 0xFF; 3251 if (mbox_post_sync_cmd(adapter, raw_mbox) == 0) { 3252 raid_dev->channel_class = *(uint8_t *)adapter->ibuf; 3253 } 3254 3255 return; 3256 } 3257 3258 3259 /** 3260 * megaraid_mbox_flush_cache - flush adapter and disks cache 3261 * @adapter : soft state for the controller 3262 * 3263 * Flush adapter cache followed by disks cache. 3264 */ 3265 static void 3266 megaraid_mbox_flush_cache(adapter_t *adapter) 3267 { 3268 mbox_t *mbox; 3269 uint8_t raw_mbox[sizeof(mbox_t)]; 3270 3271 3272 mbox = (mbox_t *)raw_mbox; 3273 3274 memset((caddr_t)raw_mbox, 0, sizeof(mbox_t)); 3275 3276 raw_mbox[0] = FLUSH_ADAPTER; 3277 3278 if (mbox_post_sync_cmd(adapter, raw_mbox) != 0) { 3279 con_log(CL_ANN, ("megaraid: flush adapter failed\n")); 3280 } 3281 3282 raw_mbox[0] = FLUSH_SYSTEM; 3283 3284 if (mbox_post_sync_cmd(adapter, raw_mbox) != 0) { 3285 con_log(CL_ANN, ("megaraid: flush disks cache failed\n")); 3286 } 3287 3288 return; 3289 } 3290 3291 3292 /** 3293 * megaraid_mbox_fire_sync_cmd - fire the sync cmd 3294 * @adapter : soft state for the controller 3295 * 3296 * Clears the pending cmds in FW and reinits its RAID structs. 3297 */ 3298 static int 3299 megaraid_mbox_fire_sync_cmd(adapter_t *adapter) 3300 { 3301 mbox_t *mbox; 3302 uint8_t raw_mbox[sizeof(mbox_t)]; 3303 mraid_device_t *raid_dev = ADAP2RAIDDEV(adapter); 3304 mbox64_t *mbox64; 3305 int status = 0; 3306 int i; 3307 uint32_t dword; 3308 3309 mbox = (mbox_t *)raw_mbox; 3310 3311 memset((caddr_t)raw_mbox, 0, sizeof(mbox_t)); 3312 3313 raw_mbox[0] = 0xFF; 3314 3315 mbox64 = raid_dev->mbox64; 3316 mbox = raid_dev->mbox; 3317 3318 /* Wait until mailbox is free */ 3319 if (megaraid_busywait_mbox(raid_dev) != 0) { 3320 status = 1; 3321 goto blocked_mailbox; 3322 } 3323 3324 /* Copy mailbox data into host structure */ 3325 memcpy((caddr_t)mbox, (caddr_t)raw_mbox, 16); 3326 mbox->cmdid = 0xFE; 3327 mbox->busy = 1; 3328 mbox->poll = 0; 3329 mbox->ack = 0; 3330 mbox->numstatus = 0; 3331 mbox->status = 0; 3332 3333 wmb(); 3334 WRINDOOR(raid_dev, raid_dev->mbox_dma | 0x1); 3335 3336 /* Wait for maximum 1 min for status to post. 3337 * If the Firmware SUPPORTS the ABOVE COMMAND, 3338 * mbox->cmd will be set to 0 3339 * else 3340 * the firmware will reject the command with 3341 * mbox->numstatus set to 1 3342 */ 3343 3344 i = 0; 3345 status = 0; 3346 while (!mbox->numstatus && mbox->cmd == 0xFF) { 3347 rmb(); 3348 msleep(1); 3349 i++; 3350 if (i > 1000 * 60) { 3351 status = 1; 3352 break; 3353 } 3354 } 3355 if (mbox->numstatus == 1) 3356 status = 1; /*cmd not supported*/ 3357 3358 /* Check for interrupt line */ 3359 dword = RDOUTDOOR(raid_dev); 3360 WROUTDOOR(raid_dev, dword); 3361 WRINDOOR(raid_dev,2); 3362 3363 return status; 3364 3365 blocked_mailbox: 3366 con_log(CL_ANN, (KERN_WARNING "megaraid: blocked mailbox\n")); 3367 return status; 3368 } 3369 3370 /** 3371 * megaraid_mbox_display_scb - display SCB information, mostly debug purposes 3372 * @adapter : controller's soft state 3373 * @scb : SCB to be displayed 3374 * @level : debug level for console print 3375 * 3376 * Diplay information about the given SCB iff the current debug level is 3377 * verbose. 3378 */ 3379 static void 3380 megaraid_mbox_display_scb(adapter_t *adapter, scb_t *scb) 3381 { 3382 mbox_ccb_t *ccb; 3383 struct scsi_cmnd *scp; 3384 mbox_t *mbox; 3385 int level; 3386 int i; 3387 3388 3389 ccb = (mbox_ccb_t *)scb->ccb; 3390 scp = scb->scp; 3391 mbox = ccb->mbox; 3392 3393 level = CL_DLEVEL3; 3394 3395 con_log(level, (KERN_NOTICE 3396 "megaraid mailbox: status:%#x cmd:%#x id:%#x ", scb->status, 3397 mbox->cmd, scb->sno)); 3398 3399 con_log(level, ("sec:%#x lba:%#x addr:%#x ld:%d sg:%d\n", 3400 mbox->numsectors, mbox->lba, mbox->xferaddr, mbox->logdrv, 3401 mbox->numsge)); 3402 3403 if (!scp) return; 3404 3405 con_log(level, (KERN_NOTICE "scsi cmnd: ")); 3406 3407 for (i = 0; i < scp->cmd_len; i++) { 3408 con_log(level, ("%#2.02x ", scp->cmnd[i])); 3409 } 3410 3411 con_log(level, ("\n")); 3412 3413 return; 3414 } 3415 3416 3417 /** 3418 * megaraid_mbox_setup_device_map - manage device ids 3419 * @adapter : Driver's soft state 3420 * 3421 * Manage the device ids to have an appropriate mapping between the kernel 3422 * scsi addresses and megaraid scsi and logical drive addresses. We export 3423 * scsi devices on their actual addresses, whereas the logical drives are 3424 * exported on a virtual scsi channel. 3425 */ 3426 static void 3427 megaraid_mbox_setup_device_map(adapter_t *adapter) 3428 { 3429 uint8_t c; 3430 uint8_t t; 3431 3432 /* 3433 * First fill the values on the logical drive channel 3434 */ 3435 for (t = 0; t < LSI_MAX_LOGICAL_DRIVES_64LD; t++) 3436 adapter->device_ids[adapter->max_channel][t] = 3437 (t < adapter->init_id) ? t : t - 1; 3438 3439 adapter->device_ids[adapter->max_channel][adapter->init_id] = 0xFF; 3440 3441 /* 3442 * Fill the values on the physical devices channels 3443 */ 3444 for (c = 0; c < adapter->max_channel; c++) 3445 for (t = 0; t < LSI_MAX_LOGICAL_DRIVES_64LD; t++) 3446 adapter->device_ids[c][t] = (c << 8) | t; 3447 } 3448 3449 3450 /* 3451 * END: internal commands library 3452 */ 3453 3454 /* 3455 * START: Interface for the common management module 3456 * 3457 * This is the module, which interfaces with the common management module to 3458 * provide support for ioctl and sysfs 3459 */ 3460 3461 /** 3462 * megaraid_cmm_register - register with the management module 3463 * @adapter : HBA soft state 3464 * 3465 * Register with the management module, which allows applications to issue 3466 * ioctl calls to the drivers. This interface is used by the management module 3467 * to setup sysfs support as well. 3468 */ 3469 static int 3470 megaraid_cmm_register(adapter_t *adapter) 3471 { 3472 mraid_device_t *raid_dev = ADAP2RAIDDEV(adapter); 3473 mraid_mmadp_t adp; 3474 scb_t *scb; 3475 mbox_ccb_t *ccb; 3476 int rval; 3477 int i; 3478 3479 // Allocate memory for the base list of scb for management module. 3480 adapter->uscb_list = kcalloc(MBOX_MAX_USER_CMDS, sizeof(scb_t), GFP_KERNEL); 3481 3482 if (adapter->uscb_list == NULL) { 3483 con_log(CL_ANN, (KERN_WARNING 3484 "megaraid: out of memory, %s %d\n", __func__, 3485 __LINE__)); 3486 return -1; 3487 } 3488 3489 3490 // Initialize the synchronization parameters for resources for 3491 // commands for management module 3492 INIT_LIST_HEAD(&adapter->uscb_pool); 3493 3494 spin_lock_init(USER_FREE_LIST_LOCK(adapter)); 3495 3496 3497 3498 // link all the packets. Note, CCB for commands, coming from the 3499 // commom management module, mailbox physical address are already 3500 // setup by it. We just need placeholder for that in our local command 3501 // control blocks 3502 for (i = 0; i < MBOX_MAX_USER_CMDS; i++) { 3503 3504 scb = adapter->uscb_list + i; 3505 ccb = raid_dev->uccb_list + i; 3506 3507 scb->ccb = (caddr_t)ccb; 3508 ccb->mbox64 = raid_dev->umbox64 + i; 3509 ccb->mbox = &ccb->mbox64->mbox32; 3510 ccb->raw_mbox = (uint8_t *)ccb->mbox; 3511 3512 scb->gp = 0; 3513 3514 // COMMAND ID 0 - (MBOX_MAX_SCSI_CMDS-1) ARE RESERVED FOR 3515 // COMMANDS COMING FROM IO SUBSYSTEM (MID-LAYER) 3516 scb->sno = i + MBOX_MAX_SCSI_CMDS; 3517 3518 scb->scp = NULL; 3519 scb->state = SCB_FREE; 3520 scb->dma_direction = PCI_DMA_NONE; 3521 scb->dma_type = MRAID_DMA_NONE; 3522 scb->dev_channel = -1; 3523 scb->dev_target = -1; 3524 3525 // put scb in the free pool 3526 list_add_tail(&scb->list, &adapter->uscb_pool); 3527 } 3528 3529 adp.unique_id = adapter->unique_id; 3530 adp.drvr_type = DRVRTYPE_MBOX; 3531 adp.drvr_data = (unsigned long)adapter; 3532 adp.pdev = adapter->pdev; 3533 adp.issue_uioc = megaraid_mbox_mm_handler; 3534 adp.timeout = MBOX_RESET_WAIT + MBOX_RESET_EXT_WAIT; 3535 adp.max_kioc = MBOX_MAX_USER_CMDS; 3536 3537 if ((rval = mraid_mm_register_adp(&adp)) != 0) { 3538 3539 con_log(CL_ANN, (KERN_WARNING 3540 "megaraid mbox: did not register with CMM\n")); 3541 3542 kfree(adapter->uscb_list); 3543 } 3544 3545 return rval; 3546 } 3547 3548 3549 /** 3550 * megaraid_cmm_unregister - un-register with the management module 3551 * @adapter : HBA soft state 3552 * 3553 * Un-register with the management module. 3554 * FIXME: mgmt module must return failure for unregister if it has pending 3555 * commands in LLD. 3556 */ 3557 static int 3558 megaraid_cmm_unregister(adapter_t *adapter) 3559 { 3560 kfree(adapter->uscb_list); 3561 mraid_mm_unregister_adp(adapter->unique_id); 3562 return 0; 3563 } 3564 3565 3566 /** 3567 * megaraid_mbox_mm_handler - interface for CMM to issue commands to LLD 3568 * @drvr_data : LLD specific data 3569 * @kioc : CMM interface packet 3570 * @action : command action 3571 * 3572 * This routine is invoked whenever the Common Management Module (CMM) has a 3573 * command for us. The 'action' parameter specifies if this is a new command 3574 * or otherwise. 3575 */ 3576 static int 3577 megaraid_mbox_mm_handler(unsigned long drvr_data, uioc_t *kioc, uint32_t action) 3578 { 3579 adapter_t *adapter; 3580 3581 if (action != IOCTL_ISSUE) { 3582 con_log(CL_ANN, (KERN_WARNING 3583 "megaraid: unsupported management action:%#2x\n", 3584 action)); 3585 return (-ENOTSUPP); 3586 } 3587 3588 adapter = (adapter_t *)drvr_data; 3589 3590 // make sure this adapter is not being detached right now. 3591 if (atomic_read(&adapter->being_detached)) { 3592 con_log(CL_ANN, (KERN_WARNING 3593 "megaraid: reject management request, detaching\n")); 3594 return (-ENODEV); 3595 } 3596 3597 switch (kioc->opcode) { 3598 3599 case GET_ADAP_INFO: 3600 3601 kioc->status = gather_hbainfo(adapter, (mraid_hba_info_t *) 3602 (unsigned long)kioc->buf_vaddr); 3603 3604 kioc->done(kioc); 3605 3606 return kioc->status; 3607 3608 case MBOX_CMD: 3609 3610 return megaraid_mbox_mm_command(adapter, kioc); 3611 3612 default: 3613 kioc->status = (-EINVAL); 3614 kioc->done(kioc); 3615 return (-EINVAL); 3616 } 3617 3618 return 0; // not reached 3619 } 3620 3621 /** 3622 * megaraid_mbox_mm_command - issues commands routed through CMM 3623 * @adapter : HBA soft state 3624 * @kioc : management command packet 3625 * 3626 * Issues commands, which are routed through the management module. 3627 */ 3628 static int 3629 megaraid_mbox_mm_command(adapter_t *adapter, uioc_t *kioc) 3630 { 3631 struct list_head *head = &adapter->uscb_pool; 3632 mbox64_t *mbox64; 3633 uint8_t *raw_mbox; 3634 scb_t *scb; 3635 mbox_ccb_t *ccb; 3636 unsigned long flags; 3637 3638 // detach one scb from free pool 3639 spin_lock_irqsave(USER_FREE_LIST_LOCK(adapter), flags); 3640 3641 if (list_empty(head)) { // should never happen because of CMM 3642 3643 con_log(CL_ANN, (KERN_WARNING 3644 "megaraid mbox: bug in cmm handler, lost resources\n")); 3645 3646 spin_unlock_irqrestore(USER_FREE_LIST_LOCK(adapter), flags); 3647 3648 return (-EINVAL); 3649 } 3650 3651 scb = list_entry(head->next, scb_t, list); 3652 list_del_init(&scb->list); 3653 3654 spin_unlock_irqrestore(USER_FREE_LIST_LOCK(adapter), flags); 3655 3656 scb->state = SCB_ACTIVE; 3657 scb->dma_type = MRAID_DMA_NONE; 3658 scb->dma_direction = PCI_DMA_NONE; 3659 3660 ccb = (mbox_ccb_t *)scb->ccb; 3661 mbox64 = (mbox64_t *)(unsigned long)kioc->cmdbuf; 3662 raw_mbox = (uint8_t *)&mbox64->mbox32; 3663 3664 memcpy(ccb->mbox64, mbox64, sizeof(mbox64_t)); 3665 3666 scb->gp = (unsigned long)kioc; 3667 3668 /* 3669 * If it is a logdrv random delete operation, we have to wait till 3670 * there are no outstanding cmds at the fw and then issue it directly 3671 */ 3672 if (raw_mbox[0] == FC_DEL_LOGDRV && raw_mbox[2] == OP_DEL_LOGDRV) { 3673 3674 if (wait_till_fw_empty(adapter)) { 3675 con_log(CL_ANN, (KERN_NOTICE 3676 "megaraid mbox: LD delete, timed out\n")); 3677 3678 kioc->status = -ETIME; 3679 3680 scb->status = -1; 3681 3682 megaraid_mbox_mm_done(adapter, scb); 3683 3684 return (-ETIME); 3685 } 3686 3687 INIT_LIST_HEAD(&scb->list); 3688 3689 scb->state = SCB_ISSUED; 3690 if (mbox_post_cmd(adapter, scb) != 0) { 3691 3692 con_log(CL_ANN, (KERN_NOTICE 3693 "megaraid mbox: LD delete, mailbox busy\n")); 3694 3695 kioc->status = -EBUSY; 3696 3697 scb->status = -1; 3698 3699 megaraid_mbox_mm_done(adapter, scb); 3700 3701 return (-EBUSY); 3702 } 3703 3704 return 0; 3705 } 3706 3707 // put the command on the pending list and execute 3708 megaraid_mbox_runpendq(adapter, scb); 3709 3710 return 0; 3711 } 3712 3713 3714 static int 3715 wait_till_fw_empty(adapter_t *adapter) 3716 { 3717 unsigned long flags = 0; 3718 int i; 3719 3720 3721 /* 3722 * Set the quiescent flag to stop issuing cmds to FW. 3723 */ 3724 spin_lock_irqsave(&adapter->lock, flags); 3725 adapter->quiescent++; 3726 spin_unlock_irqrestore(&adapter->lock, flags); 3727 3728 /* 3729 * Wait till there are no more cmds outstanding at FW. Try for at most 3730 * 60 seconds 3731 */ 3732 for (i = 0; i < 60 && adapter->outstanding_cmds; i++) { 3733 con_log(CL_DLEVEL1, (KERN_INFO 3734 "megaraid: FW has %d pending commands\n", 3735 adapter->outstanding_cmds)); 3736 3737 msleep(1000); 3738 } 3739 3740 return adapter->outstanding_cmds; 3741 } 3742 3743 3744 /** 3745 * megaraid_mbox_mm_done - callback for CMM commands 3746 * @adapter : HBA soft state 3747 * @scb : completed command 3748 * 3749 * Callback routine for internal commands originated from the management 3750 * module. 3751 */ 3752 static void 3753 megaraid_mbox_mm_done(adapter_t *adapter, scb_t *scb) 3754 { 3755 uioc_t *kioc; 3756 mbox64_t *mbox64; 3757 uint8_t *raw_mbox; 3758 unsigned long flags; 3759 3760 kioc = (uioc_t *)scb->gp; 3761 mbox64 = (mbox64_t *)(unsigned long)kioc->cmdbuf; 3762 mbox64->mbox32.status = scb->status; 3763 raw_mbox = (uint8_t *)&mbox64->mbox32; 3764 3765 3766 // put scb in the free pool 3767 scb->state = SCB_FREE; 3768 scb->scp = NULL; 3769 3770 spin_lock_irqsave(USER_FREE_LIST_LOCK(adapter), flags); 3771 3772 list_add(&scb->list, &adapter->uscb_pool); 3773 3774 spin_unlock_irqrestore(USER_FREE_LIST_LOCK(adapter), flags); 3775 3776 // if a delete logical drive operation succeeded, restart the 3777 // controller 3778 if (raw_mbox[0] == FC_DEL_LOGDRV && raw_mbox[2] == OP_DEL_LOGDRV) { 3779 3780 adapter->quiescent--; 3781 3782 megaraid_mbox_runpendq(adapter, NULL); 3783 } 3784 3785 kioc->done(kioc); 3786 3787 return; 3788 } 3789 3790 3791 /** 3792 * gather_hbainfo - HBA characteristics for the applications 3793 * @adapter : HBA soft state 3794 * @hinfo : pointer to the caller's host info strucuture 3795 */ 3796 static int 3797 gather_hbainfo(adapter_t *adapter, mraid_hba_info_t *hinfo) 3798 { 3799 uint8_t dmajor; 3800 3801 dmajor = megaraid_mbox_version[0]; 3802 3803 hinfo->pci_vendor_id = adapter->pdev->vendor; 3804 hinfo->pci_device_id = adapter->pdev->device; 3805 hinfo->subsys_vendor_id = adapter->pdev->subsystem_vendor; 3806 hinfo->subsys_device_id = adapter->pdev->subsystem_device; 3807 3808 hinfo->pci_bus = adapter->pdev->bus->number; 3809 hinfo->pci_dev_fn = adapter->pdev->devfn; 3810 hinfo->pci_slot = PCI_SLOT(adapter->pdev->devfn); 3811 hinfo->irq = adapter->host->irq; 3812 hinfo->baseport = ADAP2RAIDDEV(adapter)->baseport; 3813 3814 hinfo->unique_id = (hinfo->pci_bus << 8) | adapter->pdev->devfn; 3815 hinfo->host_no = adapter->host->host_no; 3816 3817 return 0; 3818 } 3819 3820 /* 3821 * END: Interface for the common management module 3822 */ 3823 3824 3825 3826 /** 3827 * megaraid_sysfs_alloc_resources - allocate sysfs related resources 3828 * @adapter : controller's soft state 3829 * 3830 * Allocate packets required to issue FW calls whenever the sysfs attributes 3831 * are read. These attributes would require up-to-date information from the 3832 * FW. Also set up resources for mutual exclusion to share these resources and 3833 * the wait queue. 3834 * 3835 * Return 0 on success. 3836 * Return -ERROR_CODE on failure. 3837 */ 3838 static int 3839 megaraid_sysfs_alloc_resources(adapter_t *adapter) 3840 { 3841 mraid_device_t *raid_dev = ADAP2RAIDDEV(adapter); 3842 int rval = 0; 3843 3844 raid_dev->sysfs_uioc = kmalloc(sizeof(uioc_t), GFP_KERNEL); 3845 3846 raid_dev->sysfs_mbox64 = kmalloc(sizeof(mbox64_t), GFP_KERNEL); 3847 3848 raid_dev->sysfs_buffer = pci_alloc_consistent(adapter->pdev, 3849 PAGE_SIZE, &raid_dev->sysfs_buffer_dma); 3850 3851 if (!raid_dev->sysfs_uioc || !raid_dev->sysfs_mbox64 || 3852 !raid_dev->sysfs_buffer) { 3853 3854 con_log(CL_ANN, (KERN_WARNING 3855 "megaraid: out of memory, %s %d\n", __func__, 3856 __LINE__)); 3857 3858 rval = -ENOMEM; 3859 3860 megaraid_sysfs_free_resources(adapter); 3861 } 3862 3863 mutex_init(&raid_dev->sysfs_mtx); 3864 3865 init_waitqueue_head(&raid_dev->sysfs_wait_q); 3866 3867 return rval; 3868 } 3869 3870 3871 /** 3872 * megaraid_sysfs_free_resources - free sysfs related resources 3873 * @adapter : controller's soft state 3874 * 3875 * Free packets allocated for sysfs FW commands 3876 */ 3877 static void 3878 megaraid_sysfs_free_resources(adapter_t *adapter) 3879 { 3880 mraid_device_t *raid_dev = ADAP2RAIDDEV(adapter); 3881 3882 kfree(raid_dev->sysfs_uioc); 3883 kfree(raid_dev->sysfs_mbox64); 3884 3885 if (raid_dev->sysfs_buffer) { 3886 pci_free_consistent(adapter->pdev, PAGE_SIZE, 3887 raid_dev->sysfs_buffer, raid_dev->sysfs_buffer_dma); 3888 } 3889 } 3890 3891 3892 /** 3893 * megaraid_sysfs_get_ldmap_done - callback for get ldmap 3894 * @uioc : completed packet 3895 * 3896 * Callback routine called in the ISR/tasklet context for get ldmap call 3897 */ 3898 static void 3899 megaraid_sysfs_get_ldmap_done(uioc_t *uioc) 3900 { 3901 adapter_t *adapter = (adapter_t *)uioc->buf_vaddr; 3902 mraid_device_t *raid_dev = ADAP2RAIDDEV(adapter); 3903 3904 uioc->status = 0; 3905 3906 wake_up(&raid_dev->sysfs_wait_q); 3907 } 3908 3909 3910 /** 3911 * megaraid_sysfs_get_ldmap_timeout - timeout handling for get ldmap 3912 * @data : timed out packet 3913 * 3914 * Timeout routine to recover and return to application, in case the adapter 3915 * has stopped responding. A timeout of 60 seconds for this command seems like 3916 * a good value. 3917 */ 3918 static void 3919 megaraid_sysfs_get_ldmap_timeout(unsigned long data) 3920 { 3921 uioc_t *uioc = (uioc_t *)data; 3922 adapter_t *adapter = (adapter_t *)uioc->buf_vaddr; 3923 mraid_device_t *raid_dev = ADAP2RAIDDEV(adapter); 3924 3925 uioc->status = -ETIME; 3926 3927 wake_up(&raid_dev->sysfs_wait_q); 3928 } 3929 3930 3931 /** 3932 * megaraid_sysfs_get_ldmap - get update logical drive map 3933 * @adapter : controller's soft state 3934 * 3935 * This routine will be called whenever user reads the logical drive 3936 * attributes, go get the current logical drive mapping table from the 3937 * firmware. We use the management API's to issue commands to the controller. 3938 * 3939 * NOTE: The commands issuance functionality is not generalized and 3940 * implemented in context of "get ld map" command only. If required, the 3941 * command issuance logical can be trivially pulled out and implemented as a 3942 * standalone library. For now, this should suffice since there is no other 3943 * user of this interface. 3944 * 3945 * Return 0 on success. 3946 * Return -1 on failure. 3947 */ 3948 static int 3949 megaraid_sysfs_get_ldmap(adapter_t *adapter) 3950 { 3951 mraid_device_t *raid_dev = ADAP2RAIDDEV(adapter); 3952 uioc_t *uioc; 3953 mbox64_t *mbox64; 3954 mbox_t *mbox; 3955 char *raw_mbox; 3956 struct timer_list sysfs_timer; 3957 struct timer_list *timerp; 3958 caddr_t ldmap; 3959 int rval = 0; 3960 3961 /* 3962 * Allow only one read at a time to go through the sysfs attributes 3963 */ 3964 mutex_lock(&raid_dev->sysfs_mtx); 3965 3966 uioc = raid_dev->sysfs_uioc; 3967 mbox64 = raid_dev->sysfs_mbox64; 3968 ldmap = raid_dev->sysfs_buffer; 3969 3970 memset(uioc, 0, sizeof(uioc_t)); 3971 memset(mbox64, 0, sizeof(mbox64_t)); 3972 memset(ldmap, 0, sizeof(raid_dev->curr_ldmap)); 3973 3974 mbox = &mbox64->mbox32; 3975 raw_mbox = (char *)mbox; 3976 uioc->cmdbuf = (uint64_t)(unsigned long)mbox64; 3977 uioc->buf_vaddr = (caddr_t)adapter; 3978 uioc->status = -ENODATA; 3979 uioc->done = megaraid_sysfs_get_ldmap_done; 3980 3981 /* 3982 * Prepare the mailbox packet to get the current logical drive mapping 3983 * table 3984 */ 3985 mbox->xferaddr = (uint32_t)raid_dev->sysfs_buffer_dma; 3986 3987 raw_mbox[0] = FC_DEL_LOGDRV; 3988 raw_mbox[2] = OP_GET_LDID_MAP; 3989 3990 /* 3991 * Setup a timer to recover from a non-responding controller 3992 */ 3993 timerp = &sysfs_timer; 3994 init_timer(timerp); 3995 3996 timerp->function = megaraid_sysfs_get_ldmap_timeout; 3997 timerp->data = (unsigned long)uioc; 3998 timerp->expires = jiffies + 60 * HZ; 3999 4000 add_timer(timerp); 4001 4002 /* 4003 * Send the command to the firmware 4004 */ 4005 rval = megaraid_mbox_mm_command(adapter, uioc); 4006 4007 if (rval == 0) { // command successfully issued 4008 wait_event(raid_dev->sysfs_wait_q, (uioc->status != -ENODATA)); 4009 4010 /* 4011 * Check if the command timed out 4012 */ 4013 if (uioc->status == -ETIME) { 4014 con_log(CL_ANN, (KERN_NOTICE 4015 "megaraid: sysfs get ld map timed out\n")); 4016 4017 rval = -ETIME; 4018 } 4019 else { 4020 rval = mbox->status; 4021 } 4022 4023 if (rval == 0) { 4024 memcpy(raid_dev->curr_ldmap, ldmap, 4025 sizeof(raid_dev->curr_ldmap)); 4026 } 4027 else { 4028 con_log(CL_ANN, (KERN_NOTICE 4029 "megaraid: get ld map failed with %x\n", rval)); 4030 } 4031 } 4032 else { 4033 con_log(CL_ANN, (KERN_NOTICE 4034 "megaraid: could not issue ldmap command:%x\n", rval)); 4035 } 4036 4037 4038 del_timer_sync(timerp); 4039 4040 mutex_unlock(&raid_dev->sysfs_mtx); 4041 4042 return rval; 4043 } 4044 4045 4046 /** 4047 * megaraid_sysfs_show_app_hndl - display application handle for this adapter 4048 * @cdev : class device object representation for the host 4049 * @buf : buffer to send data to 4050 * 4051 * Display the handle used by the applications while executing management 4052 * tasks on the adapter. We invoke a management module API to get the adapter 4053 * handle, since we do not interface with applications directly. 4054 */ 4055 static ssize_t 4056 megaraid_sysfs_show_app_hndl(struct device *dev, struct device_attribute *attr, 4057 char *buf) 4058 { 4059 struct Scsi_Host *shost = class_to_shost(dev); 4060 adapter_t *adapter = (adapter_t *)SCSIHOST2ADAP(shost); 4061 uint32_t app_hndl; 4062 4063 app_hndl = mraid_mm_adapter_app_handle(adapter->unique_id); 4064 4065 return snprintf(buf, 8, "%u\n", app_hndl); 4066 } 4067 4068 4069 /** 4070 * megaraid_sysfs_show_ldnum - display the logical drive number for this device 4071 * @dev : device object representation for the scsi device 4072 * @attr : device attribute to show 4073 * @buf : buffer to send data to 4074 * 4075 * Display the logical drive number for the device in question, if it a valid 4076 * logical drive. For physical devices, "-1" is returned. 4077 * 4078 * The logical drive number is displayed in following format: 4079 * 4080 * <SCSI ID> <LD NUM> <LD STICKY ID> <APP ADAPTER HANDLE> 4081 * 4082 * <int> <int> <int> <int> 4083 */ 4084 static ssize_t 4085 megaraid_sysfs_show_ldnum(struct device *dev, struct device_attribute *attr, char *buf) 4086 { 4087 struct scsi_device *sdev = to_scsi_device(dev); 4088 adapter_t *adapter = (adapter_t *)SCSIHOST2ADAP(sdev->host); 4089 mraid_device_t *raid_dev = ADAP2RAIDDEV(adapter); 4090 int scsi_id = -1; 4091 int logical_drv = -1; 4092 int ldid_map = -1; 4093 uint32_t app_hndl = 0; 4094 int mapped_sdev_id; 4095 int rval; 4096 int i; 4097 4098 if (raid_dev->random_del_supported && 4099 MRAID_IS_LOGICAL_SDEV(adapter, sdev)) { 4100 4101 rval = megaraid_sysfs_get_ldmap(adapter); 4102 if (rval == 0) { 4103 4104 for (i = 0; i < MAX_LOGICAL_DRIVES_40LD; i++) { 4105 4106 mapped_sdev_id = sdev->id; 4107 4108 if (sdev->id > adapter->init_id) { 4109 mapped_sdev_id -= 1; 4110 } 4111 4112 if (raid_dev->curr_ldmap[i] == mapped_sdev_id) { 4113 4114 scsi_id = sdev->id; 4115 4116 logical_drv = i; 4117 4118 ldid_map = raid_dev->curr_ldmap[i]; 4119 4120 app_hndl = mraid_mm_adapter_app_handle( 4121 adapter->unique_id); 4122 4123 break; 4124 } 4125 } 4126 } 4127 else { 4128 con_log(CL_ANN, (KERN_NOTICE 4129 "megaraid: sysfs get ld map failed: %x\n", 4130 rval)); 4131 } 4132 } 4133 4134 return snprintf(buf, 36, "%d %d %d %d\n", scsi_id, logical_drv, 4135 ldid_map, app_hndl); 4136 } 4137 4138 4139 /* 4140 * END: Mailbox Low Level Driver 4141 */ 4142 module_init(megaraid_init); 4143 module_exit(megaraid_exit); 4144 4145 /* vim: set ts=8 sw=8 tw=78 ai si: */ 4146