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