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 device *, struct device_attribute *attr, 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 = { 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 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 device_attribute *megaraid_shost_attrs[] = { 321 &dev_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 * @reason: calling context 339 * 340 * Return value: 341 * actual depth set 342 */ 343 static int megaraid_change_queue_depth(struct scsi_device *sdev, int qdepth, 344 int reason) 345 { 346 if (reason != SCSI_QDEPTH_DEFAULT) 347 return -EOPNOTSUPP; 348 349 if (qdepth > MBOX_MAX_SCSI_CMDS) 350 qdepth = MBOX_MAX_SCSI_CMDS; 351 scsi_adjust_queue_depth(sdev, 0, qdepth); 352 return sdev->queue_depth; 353 } 354 355 /* 356 * Scsi host template for megaraid unified driver 357 */ 358 static struct scsi_host_template megaraid_template_g = { 359 .module = THIS_MODULE, 360 .name = "LSI Logic MegaRAID driver", 361 .proc_name = "megaraid", 362 .queuecommand = megaraid_queue_command, 363 .eh_abort_handler = megaraid_abort_handler, 364 .eh_device_reset_handler = megaraid_reset_handler, 365 .eh_bus_reset_handler = megaraid_reset_handler, 366 .eh_host_reset_handler = megaraid_reset_handler, 367 .change_queue_depth = megaraid_change_queue_depth, 368 .use_clustering = ENABLE_CLUSTERING, 369 .sdev_attrs = megaraid_sdev_attrs, 370 .shost_attrs = megaraid_shost_attrs, 371 }; 372 373 374 /** 375 * megaraid_init - module load hook 376 * 377 * We register ourselves as hotplug enabled module and let PCI subsystem 378 * discover our adapters. 379 */ 380 static int __init 381 megaraid_init(void) 382 { 383 int rval; 384 385 // Announce the driver version 386 con_log(CL_ANN, (KERN_INFO "megaraid: %s %s\n", MEGARAID_VERSION, 387 MEGARAID_EXT_VERSION)); 388 389 // check validity of module parameters 390 if (megaraid_cmd_per_lun > MBOX_MAX_SCSI_CMDS) { 391 392 con_log(CL_ANN, (KERN_WARNING 393 "megaraid mailbox: max commands per lun reset to %d\n", 394 MBOX_MAX_SCSI_CMDS)); 395 396 megaraid_cmd_per_lun = MBOX_MAX_SCSI_CMDS; 397 } 398 399 400 // register as a PCI hot-plug driver module 401 rval = pci_register_driver(&megaraid_pci_driver); 402 if (rval < 0) { 403 con_log(CL_ANN, (KERN_WARNING 404 "megaraid: could not register hotplug support.\n")); 405 } 406 407 return rval; 408 } 409 410 411 /** 412 * megaraid_exit - driver unload entry point 413 * 414 * We simply unwrap the megaraid_init routine here. 415 */ 416 static void __exit 417 megaraid_exit(void) 418 { 419 con_log(CL_DLEVEL1, (KERN_NOTICE "megaraid: unloading framework\n")); 420 421 // unregister as PCI hotplug driver 422 pci_unregister_driver(&megaraid_pci_driver); 423 424 return; 425 } 426 427 428 /** 429 * megaraid_probe_one - PCI hotplug entry point 430 * @pdev : handle to this controller's PCI configuration space 431 * @id : pci device id of the class of controllers 432 * 433 * This routine should be called whenever a new adapter is detected by the 434 * PCI hotplug susbsystem. 435 */ 436 static int __devinit 437 megaraid_probe_one(struct pci_dev *pdev, const struct pci_device_id *id) 438 { 439 adapter_t *adapter; 440 441 442 // detected a new controller 443 con_log(CL_ANN, (KERN_INFO 444 "megaraid: probe new device %#4.04x:%#4.04x:%#4.04x:%#4.04x: ", 445 pdev->vendor, pdev->device, pdev->subsystem_vendor, 446 pdev->subsystem_device)); 447 448 con_log(CL_ANN, ("bus %d:slot %d:func %d\n", pdev->bus->number, 449 PCI_SLOT(pdev->devfn), PCI_FUNC(pdev->devfn))); 450 451 if (pci_enable_device(pdev)) { 452 con_log(CL_ANN, (KERN_WARNING 453 "megaraid: pci_enable_device failed\n")); 454 455 return -ENODEV; 456 } 457 458 // Enable bus-mastering on this controller 459 pci_set_master(pdev); 460 461 // Allocate the per driver initialization structure 462 adapter = kzalloc(sizeof(adapter_t), GFP_KERNEL); 463 464 if (adapter == NULL) { 465 con_log(CL_ANN, (KERN_WARNING 466 "megaraid: out of memory, %s %d.\n", __func__, __LINE__)); 467 468 goto out_probe_one; 469 } 470 471 472 // set up PCI related soft state and other pre-known parameters 473 adapter->unique_id = pdev->bus->number << 8 | pdev->devfn; 474 adapter->irq = pdev->irq; 475 adapter->pdev = pdev; 476 477 atomic_set(&adapter->being_detached, 0); 478 479 // Setup the default DMA mask. This would be changed later on 480 // depending on hardware capabilities 481 if (pci_set_dma_mask(adapter->pdev, DMA_BIT_MASK(32)) != 0) { 482 483 con_log(CL_ANN, (KERN_WARNING 484 "megaraid: pci_set_dma_mask failed:%d\n", __LINE__)); 485 486 goto out_free_adapter; 487 } 488 489 490 // Initialize the synchronization lock for kernel and LLD 491 spin_lock_init(&adapter->lock); 492 493 // Initialize the command queues: the list of free SCBs and the list 494 // of pending SCBs. 495 INIT_LIST_HEAD(&adapter->kscb_pool); 496 spin_lock_init(SCSI_FREE_LIST_LOCK(adapter)); 497 498 INIT_LIST_HEAD(&adapter->pend_list); 499 spin_lock_init(PENDING_LIST_LOCK(adapter)); 500 501 INIT_LIST_HEAD(&adapter->completed_list); 502 spin_lock_init(COMPLETED_LIST_LOCK(adapter)); 503 504 505 // Start the mailbox based controller 506 if (megaraid_init_mbox(adapter) != 0) { 507 con_log(CL_ANN, (KERN_WARNING 508 "megaraid: maibox adapter did not initialize\n")); 509 510 goto out_free_adapter; 511 } 512 513 // Register with LSI Common Management Module 514 if (megaraid_cmm_register(adapter) != 0) { 515 516 con_log(CL_ANN, (KERN_WARNING 517 "megaraid: could not register with management module\n")); 518 519 goto out_fini_mbox; 520 } 521 522 // setup adapter handle in PCI soft state 523 pci_set_drvdata(pdev, adapter); 524 525 // attach with scsi mid-layer 526 if (megaraid_io_attach(adapter) != 0) { 527 528 con_log(CL_ANN, (KERN_WARNING "megaraid: io attach failed\n")); 529 530 goto out_cmm_unreg; 531 } 532 533 return 0; 534 535 out_cmm_unreg: 536 pci_set_drvdata(pdev, NULL); 537 megaraid_cmm_unregister(adapter); 538 out_fini_mbox: 539 megaraid_fini_mbox(adapter); 540 out_free_adapter: 541 kfree(adapter); 542 out_probe_one: 543 pci_disable_device(pdev); 544 545 return -ENODEV; 546 } 547 548 549 /** 550 * megaraid_detach_one - release framework resources and call LLD release routine 551 * @pdev : handle for our PCI cofiguration space 552 * 553 * This routine is called during driver unload. We free all the allocated 554 * resources and call the corresponding LLD so that it can also release all 555 * its resources. 556 * 557 * This routine is also called from the PCI hotplug system. 558 */ 559 static void 560 megaraid_detach_one(struct pci_dev *pdev) 561 { 562 adapter_t *adapter; 563 struct Scsi_Host *host; 564 565 566 // Start a rollback on this adapter 567 adapter = pci_get_drvdata(pdev); 568 569 if (!adapter) { 570 con_log(CL_ANN, (KERN_CRIT 571 "megaraid: Invalid detach on %#4.04x:%#4.04x:%#4.04x:%#4.04x\n", 572 pdev->vendor, pdev->device, pdev->subsystem_vendor, 573 pdev->subsystem_device)); 574 575 return; 576 } 577 else { 578 con_log(CL_ANN, (KERN_NOTICE 579 "megaraid: detaching device %#4.04x:%#4.04x:%#4.04x:%#4.04x\n", 580 pdev->vendor, pdev->device, pdev->subsystem_vendor, 581 pdev->subsystem_device)); 582 } 583 584 585 host = adapter->host; 586 587 // do not allow any more requests from the management module for this 588 // adapter. 589 // FIXME: How do we account for the request which might still be 590 // pending with us? 591 atomic_set(&adapter->being_detached, 1); 592 593 // detach from the IO sub-system 594 megaraid_io_detach(adapter); 595 596 // reset the device state in the PCI structure. We check this 597 // condition when we enter here. If the device state is NULL, 598 // that would mean the device has already been removed 599 pci_set_drvdata(pdev, NULL); 600 601 // Unregister from common management module 602 // 603 // FIXME: this must return success or failure for conditions if there 604 // is a command pending with LLD or not. 605 megaraid_cmm_unregister(adapter); 606 607 // finalize the mailbox based controller and release all resources 608 megaraid_fini_mbox(adapter); 609 610 kfree(adapter); 611 612 scsi_host_put(host); 613 614 pci_disable_device(pdev); 615 616 return; 617 } 618 619 620 /** 621 * megaraid_mbox_shutdown - PCI shutdown for megaraid HBA 622 * @pdev : generic driver model device 623 * 624 * Shutdown notification, perform flush cache. 625 */ 626 static void 627 megaraid_mbox_shutdown(struct pci_dev *pdev) 628 { 629 adapter_t *adapter = pci_get_drvdata(pdev); 630 static int counter; 631 632 if (!adapter) { 633 con_log(CL_ANN, (KERN_WARNING 634 "megaraid: null device in shutdown\n")); 635 return; 636 } 637 638 // flush caches now 639 con_log(CL_ANN, (KERN_INFO "megaraid: flushing adapter %d...", 640 counter++)); 641 642 megaraid_mbox_flush_cache(adapter); 643 644 con_log(CL_ANN, ("done\n")); 645 } 646 647 648 /** 649 * megaraid_io_attach - attach a device with the IO subsystem 650 * @adapter : controller's soft state 651 * 652 * Attach this device with the IO subsystem. 653 */ 654 static int 655 megaraid_io_attach(adapter_t *adapter) 656 { 657 struct Scsi_Host *host; 658 659 // Initialize SCSI Host structure 660 host = scsi_host_alloc(&megaraid_template_g, 8); 661 if (!host) { 662 con_log(CL_ANN, (KERN_WARNING 663 "megaraid mbox: scsi_register failed\n")); 664 665 return -1; 666 } 667 668 SCSIHOST2ADAP(host) = (caddr_t)adapter; 669 adapter->host = host; 670 671 host->irq = adapter->irq; 672 host->unique_id = adapter->unique_id; 673 host->can_queue = adapter->max_cmds; 674 host->this_id = adapter->init_id; 675 host->sg_tablesize = adapter->sglen; 676 host->max_sectors = adapter->max_sectors; 677 host->cmd_per_lun = adapter->cmd_per_lun; 678 host->max_channel = adapter->max_channel; 679 host->max_id = adapter->max_target; 680 host->max_lun = adapter->max_lun; 681 682 683 // notify mid-layer about the new controller 684 if (scsi_add_host(host, &adapter->pdev->dev)) { 685 686 con_log(CL_ANN, (KERN_WARNING 687 "megaraid mbox: scsi_add_host failed\n")); 688 689 scsi_host_put(host); 690 691 return -1; 692 } 693 694 scsi_scan_host(host); 695 696 return 0; 697 } 698 699 700 /** 701 * megaraid_io_detach - detach a device from the IO subsystem 702 * @adapter : controller's soft state 703 * 704 * Detach this device from the IO subsystem. 705 */ 706 static void 707 megaraid_io_detach(adapter_t *adapter) 708 { 709 struct Scsi_Host *host; 710 711 con_log(CL_DLEVEL1, (KERN_INFO "megaraid: io detach\n")); 712 713 host = adapter->host; 714 715 scsi_remove_host(host); 716 717 return; 718 } 719 720 721 /* 722 * START: Mailbox Low Level Driver 723 * 724 * This is section specific to the single mailbox based controllers 725 */ 726 727 /** 728 * megaraid_init_mbox - initialize controller 729 * @adapter : our soft state 730 * 731 * - Allocate 16-byte aligned mailbox memory for firmware handshake 732 * - Allocate controller's memory resources 733 * - Find out all initialization data 734 * - Allocate memory required for all the commands 735 * - Use internal library of FW routines, build up complete soft state 736 */ 737 static int __devinit 738 megaraid_init_mbox(adapter_t *adapter) 739 { 740 struct pci_dev *pdev; 741 mraid_device_t *raid_dev; 742 int i; 743 uint32_t magic64; 744 745 746 adapter->ito = MBOX_TIMEOUT; 747 pdev = adapter->pdev; 748 749 /* 750 * Allocate and initialize the init data structure for mailbox 751 * controllers 752 */ 753 raid_dev = kzalloc(sizeof(mraid_device_t), GFP_KERNEL); 754 if (raid_dev == NULL) return -1; 755 756 757 /* 758 * Attach the adapter soft state to raid device soft state 759 */ 760 adapter->raid_device = (caddr_t)raid_dev; 761 raid_dev->fast_load = megaraid_fast_load; 762 763 764 // our baseport 765 raid_dev->baseport = pci_resource_start(pdev, 0); 766 767 if (pci_request_regions(pdev, "MegaRAID: LSI Logic Corporation") != 0) { 768 769 con_log(CL_ANN, (KERN_WARNING 770 "megaraid: mem region busy\n")); 771 772 goto out_free_raid_dev; 773 } 774 775 raid_dev->baseaddr = ioremap_nocache(raid_dev->baseport, 128); 776 777 if (!raid_dev->baseaddr) { 778 779 con_log(CL_ANN, (KERN_WARNING 780 "megaraid: could not map hba memory\n") ); 781 782 goto out_release_regions; 783 } 784 785 /* initialize the mutual exclusion lock for the mailbox */ 786 spin_lock_init(&raid_dev->mailbox_lock); 787 788 /* allocate memory required for commands */ 789 if (megaraid_alloc_cmd_packets(adapter) != 0) 790 goto out_iounmap; 791 792 /* 793 * Issue SYNC cmd to flush the pending cmds in the adapter 794 * and initialize its internal state 795 */ 796 797 if (megaraid_mbox_fire_sync_cmd(adapter)) 798 con_log(CL_ANN, ("megaraid: sync cmd failed\n")); 799 800 /* 801 * Setup the rest of the soft state using the library of 802 * FW routines 803 */ 804 805 /* request IRQ and register the interrupt service routine */ 806 if (request_irq(adapter->irq, megaraid_isr, IRQF_SHARED, "megaraid", 807 adapter)) { 808 809 con_log(CL_ANN, (KERN_WARNING 810 "megaraid: Couldn't register IRQ %d!\n", adapter->irq)); 811 goto out_alloc_cmds; 812 813 } 814 815 // Product info 816 if (megaraid_mbox_product_info(adapter) != 0) 817 goto out_free_irq; 818 819 // Do we support extended CDBs 820 adapter->max_cdb_sz = 10; 821 if (megaraid_mbox_extended_cdb(adapter) == 0) { 822 adapter->max_cdb_sz = 16; 823 } 824 825 /* 826 * Do we support cluster environment, if we do, what is the initiator 827 * id. 828 * NOTE: In a non-cluster aware firmware environment, the LLD should 829 * return 7 as initiator id. 830 */ 831 adapter->ha = 0; 832 adapter->init_id = -1; 833 if (megaraid_mbox_support_ha(adapter, &adapter->init_id) == 0) { 834 adapter->ha = 1; 835 } 836 837 /* 838 * Prepare the device ids array to have the mapping between the kernel 839 * device address and megaraid device address. 840 * We export the physical devices on their actual addresses. The 841 * logical drives are exported on a virtual SCSI channel 842 */ 843 megaraid_mbox_setup_device_map(adapter); 844 845 // If the firmware supports random deletion, update the device id map 846 if (megaraid_mbox_support_random_del(adapter)) { 847 848 // Change the logical drives numbers in device_ids array one 849 // slot in device_ids is reserved for target id, that's why 850 // "<=" below 851 for (i = 0; i <= MAX_LOGICAL_DRIVES_40LD; i++) { 852 adapter->device_ids[adapter->max_channel][i] += 0x80; 853 } 854 adapter->device_ids[adapter->max_channel][adapter->init_id] = 855 0xFF; 856 857 raid_dev->random_del_supported = 1; 858 } 859 860 /* 861 * find out the maximum number of scatter-gather elements supported by 862 * this firmware 863 */ 864 adapter->sglen = megaraid_mbox_get_max_sg(adapter); 865 866 // enumerate RAID and SCSI channels so that all devices on SCSI 867 // channels can later be exported, including disk devices 868 megaraid_mbox_enum_raid_scsi(adapter); 869 870 /* 871 * Other parameters required by upper layer 872 * 873 * maximum number of sectors per IO command 874 */ 875 adapter->max_sectors = megaraid_max_sectors; 876 877 /* 878 * number of queued commands per LUN. 879 */ 880 adapter->cmd_per_lun = megaraid_cmd_per_lun; 881 882 /* 883 * Allocate resources required to issue FW calls, when sysfs is 884 * accessed 885 */ 886 if (megaraid_sysfs_alloc_resources(adapter) != 0) 887 goto out_free_irq; 888 889 // Set the DMA mask to 64-bit. All supported controllers as capable of 890 // DMA in this range 891 pci_read_config_dword(adapter->pdev, PCI_CONF_AMISIG64, &magic64); 892 893 if (((magic64 == HBA_SIGNATURE_64_BIT) && 894 ((adapter->pdev->subsystem_device != 895 PCI_SUBSYS_ID_MEGARAID_SATA_150_6) && 896 (adapter->pdev->subsystem_device != 897 PCI_SUBSYS_ID_MEGARAID_SATA_150_4))) || 898 (adapter->pdev->vendor == PCI_VENDOR_ID_LSI_LOGIC && 899 adapter->pdev->device == PCI_DEVICE_ID_VERDE) || 900 (adapter->pdev->vendor == PCI_VENDOR_ID_LSI_LOGIC && 901 adapter->pdev->device == PCI_DEVICE_ID_DOBSON) || 902 (adapter->pdev->vendor == PCI_VENDOR_ID_LSI_LOGIC && 903 adapter->pdev->device == PCI_DEVICE_ID_LINDSAY) || 904 (adapter->pdev->vendor == PCI_VENDOR_ID_DELL && 905 adapter->pdev->device == PCI_DEVICE_ID_PERC4_DI_EVERGLADES) || 906 (adapter->pdev->vendor == PCI_VENDOR_ID_DELL && 907 adapter->pdev->device == PCI_DEVICE_ID_PERC4E_DI_KOBUK)) { 908 if (pci_set_dma_mask(adapter->pdev, DMA_BIT_MASK(64))) { 909 con_log(CL_ANN, (KERN_WARNING 910 "megaraid: DMA mask for 64-bit failed\n")); 911 912 if (pci_set_dma_mask (adapter->pdev, DMA_BIT_MASK(32))) { 913 con_log(CL_ANN, (KERN_WARNING 914 "megaraid: 32-bit DMA mask failed\n")); 915 goto out_free_sysfs_res; 916 } 917 } 918 } 919 920 // setup tasklet for DPC 921 tasklet_init(&adapter->dpc_h, megaraid_mbox_dpc, 922 (unsigned long)adapter); 923 924 con_log(CL_DLEVEL1, (KERN_INFO 925 "megaraid mbox hba successfully initialized\n")); 926 927 return 0; 928 929 out_free_sysfs_res: 930 megaraid_sysfs_free_resources(adapter); 931 out_free_irq: 932 free_irq(adapter->irq, adapter); 933 out_alloc_cmds: 934 megaraid_free_cmd_packets(adapter); 935 out_iounmap: 936 iounmap(raid_dev->baseaddr); 937 out_release_regions: 938 pci_release_regions(pdev); 939 out_free_raid_dev: 940 kfree(raid_dev); 941 942 return -1; 943 } 944 945 946 /** 947 * megaraid_fini_mbox - undo controller initialization 948 * @adapter : our soft state 949 */ 950 static void 951 megaraid_fini_mbox(adapter_t *adapter) 952 { 953 mraid_device_t *raid_dev = ADAP2RAIDDEV(adapter); 954 955 // flush all caches 956 megaraid_mbox_flush_cache(adapter); 957 958 tasklet_kill(&adapter->dpc_h); 959 960 megaraid_sysfs_free_resources(adapter); 961 962 megaraid_free_cmd_packets(adapter); 963 964 free_irq(adapter->irq, adapter); 965 966 iounmap(raid_dev->baseaddr); 967 968 pci_release_regions(adapter->pdev); 969 970 kfree(raid_dev); 971 972 return; 973 } 974 975 976 /** 977 * megaraid_alloc_cmd_packets - allocate shared mailbox 978 * @adapter : soft state of the raid controller 979 * 980 * Allocate and align the shared mailbox. This maibox is used to issue 981 * all the commands. For IO based controllers, the mailbox is also regsitered 982 * with the FW. Allocate memory for all commands as well. 983 * This is our big allocator. 984 */ 985 static int 986 megaraid_alloc_cmd_packets(adapter_t *adapter) 987 { 988 mraid_device_t *raid_dev = ADAP2RAIDDEV(adapter); 989 struct pci_dev *pdev; 990 unsigned long align; 991 scb_t *scb; 992 mbox_ccb_t *ccb; 993 struct mraid_pci_blk *epthru_pci_blk; 994 struct mraid_pci_blk *sg_pci_blk; 995 struct mraid_pci_blk *mbox_pci_blk; 996 int i; 997 998 pdev = adapter->pdev; 999 1000 /* 1001 * Setup the mailbox 1002 * Allocate the common 16-byte aligned memory for the handshake 1003 * mailbox. 1004 */ 1005 raid_dev->una_mbox64 = pci_alloc_consistent(adapter->pdev, 1006 sizeof(mbox64_t), &raid_dev->una_mbox64_dma); 1007 1008 if (!raid_dev->una_mbox64) { 1009 con_log(CL_ANN, (KERN_WARNING 1010 "megaraid: out of memory, %s %d\n", __func__, 1011 __LINE__)); 1012 return -1; 1013 } 1014 memset(raid_dev->una_mbox64, 0, sizeof(mbox64_t)); 1015 1016 /* 1017 * Align the mailbox at 16-byte boundary 1018 */ 1019 raid_dev->mbox = &raid_dev->una_mbox64->mbox32; 1020 1021 raid_dev->mbox = (mbox_t *)((((unsigned long)raid_dev->mbox) + 15) & 1022 (~0UL ^ 0xFUL)); 1023 1024 raid_dev->mbox64 = (mbox64_t *)(((unsigned long)raid_dev->mbox) - 8); 1025 1026 align = ((void *)raid_dev->mbox - 1027 ((void *)&raid_dev->una_mbox64->mbox32)); 1028 1029 raid_dev->mbox_dma = (unsigned long)raid_dev->una_mbox64_dma + 8 + 1030 align; 1031 1032 // Allocate memory for commands issued internally 1033 adapter->ibuf = pci_alloc_consistent(pdev, MBOX_IBUF_SIZE, 1034 &adapter->ibuf_dma_h); 1035 if (!adapter->ibuf) { 1036 1037 con_log(CL_ANN, (KERN_WARNING 1038 "megaraid: out of memory, %s %d\n", __func__, 1039 __LINE__)); 1040 1041 goto out_free_common_mbox; 1042 } 1043 memset(adapter->ibuf, 0, MBOX_IBUF_SIZE); 1044 1045 // Allocate memory for our SCSI Command Blocks and their associated 1046 // memory 1047 1048 /* 1049 * Allocate memory for the base list of scb. Later allocate memory for 1050 * CCBs and embedded components of each CCB and point the pointers in 1051 * scb to the allocated components 1052 * NOTE: The code to allocate SCB will be duplicated in all the LLD 1053 * since the calling routine does not yet know the number of available 1054 * commands. 1055 */ 1056 adapter->kscb_list = kcalloc(MBOX_MAX_SCSI_CMDS, sizeof(scb_t), GFP_KERNEL); 1057 1058 if (adapter->kscb_list == NULL) { 1059 con_log(CL_ANN, (KERN_WARNING 1060 "megaraid: out of memory, %s %d\n", __func__, 1061 __LINE__)); 1062 goto out_free_ibuf; 1063 } 1064 1065 // memory allocation for our command packets 1066 if (megaraid_mbox_setup_dma_pools(adapter) != 0) { 1067 con_log(CL_ANN, (KERN_WARNING 1068 "megaraid: out of memory, %s %d\n", __func__, 1069 __LINE__)); 1070 goto out_free_scb_list; 1071 } 1072 1073 // Adjust the scb pointers and link in the free pool 1074 epthru_pci_blk = raid_dev->epthru_pool; 1075 sg_pci_blk = raid_dev->sg_pool; 1076 mbox_pci_blk = raid_dev->mbox_pool; 1077 1078 for (i = 0; i < MBOX_MAX_SCSI_CMDS; i++) { 1079 scb = adapter->kscb_list + i; 1080 ccb = raid_dev->ccb_list + i; 1081 1082 ccb->mbox = (mbox_t *)(mbox_pci_blk[i].vaddr + 16); 1083 ccb->raw_mbox = (uint8_t *)ccb->mbox; 1084 ccb->mbox64 = (mbox64_t *)(mbox_pci_blk[i].vaddr + 8); 1085 ccb->mbox_dma_h = (unsigned long)mbox_pci_blk[i].dma_addr + 16; 1086 1087 // make sure the mailbox is aligned properly 1088 if (ccb->mbox_dma_h & 0x0F) { 1089 con_log(CL_ANN, (KERN_CRIT 1090 "megaraid mbox: not aligned on 16-bytes\n")); 1091 1092 goto out_teardown_dma_pools; 1093 } 1094 1095 ccb->epthru = (mraid_epassthru_t *) 1096 epthru_pci_blk[i].vaddr; 1097 ccb->epthru_dma_h = epthru_pci_blk[i].dma_addr; 1098 ccb->pthru = (mraid_passthru_t *)ccb->epthru; 1099 ccb->pthru_dma_h = ccb->epthru_dma_h; 1100 1101 1102 ccb->sgl64 = (mbox_sgl64 *)sg_pci_blk[i].vaddr; 1103 ccb->sgl_dma_h = sg_pci_blk[i].dma_addr; 1104 ccb->sgl32 = (mbox_sgl32 *)ccb->sgl64; 1105 1106 scb->ccb = (caddr_t)ccb; 1107 scb->gp = 0; 1108 1109 scb->sno = i; // command index 1110 1111 scb->scp = NULL; 1112 scb->state = SCB_FREE; 1113 scb->dma_direction = PCI_DMA_NONE; 1114 scb->dma_type = MRAID_DMA_NONE; 1115 scb->dev_channel = -1; 1116 scb->dev_target = -1; 1117 1118 // put scb in the free pool 1119 list_add_tail(&scb->list, &adapter->kscb_pool); 1120 } 1121 1122 return 0; 1123 1124 out_teardown_dma_pools: 1125 megaraid_mbox_teardown_dma_pools(adapter); 1126 out_free_scb_list: 1127 kfree(adapter->kscb_list); 1128 out_free_ibuf: 1129 pci_free_consistent(pdev, MBOX_IBUF_SIZE, (void *)adapter->ibuf, 1130 adapter->ibuf_dma_h); 1131 out_free_common_mbox: 1132 pci_free_consistent(adapter->pdev, sizeof(mbox64_t), 1133 (caddr_t)raid_dev->una_mbox64, raid_dev->una_mbox64_dma); 1134 1135 return -1; 1136 } 1137 1138 1139 /** 1140 * megaraid_free_cmd_packets - free memory 1141 * @adapter : soft state of the raid controller 1142 * 1143 * Release memory resources allocated for commands. 1144 */ 1145 static void 1146 megaraid_free_cmd_packets(adapter_t *adapter) 1147 { 1148 mraid_device_t *raid_dev = ADAP2RAIDDEV(adapter); 1149 1150 megaraid_mbox_teardown_dma_pools(adapter); 1151 1152 kfree(adapter->kscb_list); 1153 1154 pci_free_consistent(adapter->pdev, MBOX_IBUF_SIZE, 1155 (void *)adapter->ibuf, adapter->ibuf_dma_h); 1156 1157 pci_free_consistent(adapter->pdev, sizeof(mbox64_t), 1158 (caddr_t)raid_dev->una_mbox64, raid_dev->una_mbox64_dma); 1159 return; 1160 } 1161 1162 1163 /** 1164 * megaraid_mbox_setup_dma_pools - setup dma pool for command packets 1165 * @adapter : HBA soft state 1166 * 1167 * Setup the dma pools for mailbox, passthru and extended passthru structures, 1168 * and scatter-gather lists. 1169 */ 1170 static int 1171 megaraid_mbox_setup_dma_pools(adapter_t *adapter) 1172 { 1173 mraid_device_t *raid_dev = ADAP2RAIDDEV(adapter); 1174 struct mraid_pci_blk *epthru_pci_blk; 1175 struct mraid_pci_blk *sg_pci_blk; 1176 struct mraid_pci_blk *mbox_pci_blk; 1177 int i; 1178 1179 1180 1181 // Allocate memory for 16-bytes aligned mailboxes 1182 raid_dev->mbox_pool_handle = pci_pool_create("megaraid mbox pool", 1183 adapter->pdev, 1184 sizeof(mbox64_t) + 16, 1185 16, 0); 1186 1187 if (raid_dev->mbox_pool_handle == NULL) { 1188 goto fail_setup_dma_pool; 1189 } 1190 1191 mbox_pci_blk = raid_dev->mbox_pool; 1192 for (i = 0; i < MBOX_MAX_SCSI_CMDS; i++) { 1193 mbox_pci_blk[i].vaddr = pci_pool_alloc( 1194 raid_dev->mbox_pool_handle, 1195 GFP_KERNEL, 1196 &mbox_pci_blk[i].dma_addr); 1197 if (!mbox_pci_blk[i].vaddr) { 1198 goto fail_setup_dma_pool; 1199 } 1200 } 1201 1202 /* 1203 * Allocate memory for each embedded passthru strucuture pointer 1204 * Request for a 128 bytes aligned structure for each passthru command 1205 * structure 1206 * Since passthru and extended passthru commands are exclusive, they 1207 * share common memory pool. Passthru structures piggyback on memory 1208 * allocted to extended passthru since passthru is smaller of the two 1209 */ 1210 raid_dev->epthru_pool_handle = pci_pool_create("megaraid mbox pthru", 1211 adapter->pdev, sizeof(mraid_epassthru_t), 128, 0); 1212 1213 if (raid_dev->epthru_pool_handle == NULL) { 1214 goto fail_setup_dma_pool; 1215 } 1216 1217 epthru_pci_blk = raid_dev->epthru_pool; 1218 for (i = 0; i < MBOX_MAX_SCSI_CMDS; i++) { 1219 epthru_pci_blk[i].vaddr = pci_pool_alloc( 1220 raid_dev->epthru_pool_handle, 1221 GFP_KERNEL, 1222 &epthru_pci_blk[i].dma_addr); 1223 if (!epthru_pci_blk[i].vaddr) { 1224 goto fail_setup_dma_pool; 1225 } 1226 } 1227 1228 1229 // Allocate memory for each scatter-gather list. Request for 512 bytes 1230 // alignment for each sg list 1231 raid_dev->sg_pool_handle = pci_pool_create("megaraid mbox sg", 1232 adapter->pdev, 1233 sizeof(mbox_sgl64) * MBOX_MAX_SG_SIZE, 1234 512, 0); 1235 1236 if (raid_dev->sg_pool_handle == NULL) { 1237 goto fail_setup_dma_pool; 1238 } 1239 1240 sg_pci_blk = raid_dev->sg_pool; 1241 for (i = 0; i < MBOX_MAX_SCSI_CMDS; i++) { 1242 sg_pci_blk[i].vaddr = pci_pool_alloc( 1243 raid_dev->sg_pool_handle, 1244 GFP_KERNEL, 1245 &sg_pci_blk[i].dma_addr); 1246 if (!sg_pci_blk[i].vaddr) { 1247 goto fail_setup_dma_pool; 1248 } 1249 } 1250 1251 return 0; 1252 1253 fail_setup_dma_pool: 1254 megaraid_mbox_teardown_dma_pools(adapter); 1255 return -1; 1256 } 1257 1258 1259 /** 1260 * megaraid_mbox_teardown_dma_pools - teardown dma pools for command packets 1261 * @adapter : HBA soft state 1262 * 1263 * Teardown the dma pool for mailbox, passthru and extended passthru 1264 * structures, and scatter-gather lists. 1265 */ 1266 static void 1267 megaraid_mbox_teardown_dma_pools(adapter_t *adapter) 1268 { 1269 mraid_device_t *raid_dev = ADAP2RAIDDEV(adapter); 1270 struct mraid_pci_blk *epthru_pci_blk; 1271 struct mraid_pci_blk *sg_pci_blk; 1272 struct mraid_pci_blk *mbox_pci_blk; 1273 int i; 1274 1275 1276 sg_pci_blk = raid_dev->sg_pool; 1277 for (i = 0; i < MBOX_MAX_SCSI_CMDS && sg_pci_blk[i].vaddr; i++) { 1278 pci_pool_free(raid_dev->sg_pool_handle, sg_pci_blk[i].vaddr, 1279 sg_pci_blk[i].dma_addr); 1280 } 1281 if (raid_dev->sg_pool_handle) 1282 pci_pool_destroy(raid_dev->sg_pool_handle); 1283 1284 1285 epthru_pci_blk = raid_dev->epthru_pool; 1286 for (i = 0; i < MBOX_MAX_SCSI_CMDS && epthru_pci_blk[i].vaddr; i++) { 1287 pci_pool_free(raid_dev->epthru_pool_handle, 1288 epthru_pci_blk[i].vaddr, epthru_pci_blk[i].dma_addr); 1289 } 1290 if (raid_dev->epthru_pool_handle) 1291 pci_pool_destroy(raid_dev->epthru_pool_handle); 1292 1293 1294 mbox_pci_blk = raid_dev->mbox_pool; 1295 for (i = 0; i < MBOX_MAX_SCSI_CMDS && mbox_pci_blk[i].vaddr; i++) { 1296 pci_pool_free(raid_dev->mbox_pool_handle, 1297 mbox_pci_blk[i].vaddr, mbox_pci_blk[i].dma_addr); 1298 } 1299 if (raid_dev->mbox_pool_handle) 1300 pci_pool_destroy(raid_dev->mbox_pool_handle); 1301 1302 return; 1303 } 1304 1305 1306 /** 1307 * megaraid_alloc_scb - detach and return a scb from the free list 1308 * @adapter : controller's soft state 1309 * @scp : pointer to the scsi command to be executed 1310 * 1311 * Return the scb from the head of the free list. %NULL if there are none 1312 * available. 1313 */ 1314 static scb_t * 1315 megaraid_alloc_scb(adapter_t *adapter, struct scsi_cmnd *scp) 1316 { 1317 struct list_head *head = &adapter->kscb_pool; 1318 scb_t *scb = NULL; 1319 unsigned long flags; 1320 1321 // detach scb from free pool 1322 spin_lock_irqsave(SCSI_FREE_LIST_LOCK(adapter), flags); 1323 1324 if (list_empty(head)) { 1325 spin_unlock_irqrestore(SCSI_FREE_LIST_LOCK(adapter), flags); 1326 return NULL; 1327 } 1328 1329 scb = list_entry(head->next, scb_t, list); 1330 list_del_init(&scb->list); 1331 1332 spin_unlock_irqrestore(SCSI_FREE_LIST_LOCK(adapter), flags); 1333 1334 scb->state = SCB_ACTIVE; 1335 scb->scp = scp; 1336 scb->dma_type = MRAID_DMA_NONE; 1337 1338 return scb; 1339 } 1340 1341 1342 /** 1343 * megaraid_dealloc_scb - return the scb to the free pool 1344 * @adapter : controller's soft state 1345 * @scb : scb to be freed 1346 * 1347 * Return the scb back to the free list of scbs. The caller must 'flush' the 1348 * SCB before calling us. E.g., performing pci_unamp and/or pci_sync etc. 1349 * NOTE NOTE: Make sure the scb is not on any list before calling this 1350 * routine. 1351 */ 1352 static inline void 1353 megaraid_dealloc_scb(adapter_t *adapter, scb_t *scb) 1354 { 1355 unsigned long flags; 1356 1357 // put scb in the free pool 1358 scb->state = SCB_FREE; 1359 scb->scp = NULL; 1360 spin_lock_irqsave(SCSI_FREE_LIST_LOCK(adapter), flags); 1361 1362 list_add(&scb->list, &adapter->kscb_pool); 1363 1364 spin_unlock_irqrestore(SCSI_FREE_LIST_LOCK(adapter), flags); 1365 1366 return; 1367 } 1368 1369 1370 /** 1371 * megaraid_mbox_mksgl - make the scatter-gather list 1372 * @adapter : controller's soft state 1373 * @scb : scsi control block 1374 * 1375 * Prepare the scatter-gather list. 1376 */ 1377 static int 1378 megaraid_mbox_mksgl(adapter_t *adapter, scb_t *scb) 1379 { 1380 struct scatterlist *sgl; 1381 mbox_ccb_t *ccb; 1382 struct scsi_cmnd *scp; 1383 int sgcnt; 1384 int i; 1385 1386 1387 scp = scb->scp; 1388 ccb = (mbox_ccb_t *)scb->ccb; 1389 1390 sgcnt = scsi_dma_map(scp); 1391 BUG_ON(sgcnt < 0 || sgcnt > adapter->sglen); 1392 1393 // no mapping required if no data to be transferred 1394 if (!sgcnt) 1395 return 0; 1396 1397 scb->dma_type = MRAID_DMA_WSG; 1398 1399 scsi_for_each_sg(scp, sgl, sgcnt, i) { 1400 ccb->sgl64[i].address = sg_dma_address(sgl); 1401 ccb->sgl64[i].length = sg_dma_len(sgl); 1402 } 1403 1404 // Return count of SG nodes 1405 return sgcnt; 1406 } 1407 1408 1409 /** 1410 * mbox_post_cmd - issue a mailbox command 1411 * @adapter : controller's soft state 1412 * @scb : command to be issued 1413 * 1414 * Post the command to the controller if mailbox is available. 1415 */ 1416 static int 1417 mbox_post_cmd(adapter_t *adapter, scb_t *scb) 1418 { 1419 mraid_device_t *raid_dev = ADAP2RAIDDEV(adapter); 1420 mbox64_t *mbox64; 1421 mbox_t *mbox; 1422 mbox_ccb_t *ccb; 1423 unsigned long flags; 1424 unsigned int i = 0; 1425 1426 1427 ccb = (mbox_ccb_t *)scb->ccb; 1428 mbox = raid_dev->mbox; 1429 mbox64 = raid_dev->mbox64; 1430 1431 /* 1432 * Check for busy mailbox. If it is, return failure - the caller 1433 * should retry later. 1434 */ 1435 spin_lock_irqsave(MAILBOX_LOCK(raid_dev), flags); 1436 1437 if (unlikely(mbox->busy)) { 1438 do { 1439 udelay(1); 1440 i++; 1441 rmb(); 1442 } while(mbox->busy && (i < max_mbox_busy_wait)); 1443 1444 if (mbox->busy) { 1445 1446 spin_unlock_irqrestore(MAILBOX_LOCK(raid_dev), flags); 1447 1448 return -1; 1449 } 1450 } 1451 1452 1453 // Copy this command's mailbox data into "adapter's" mailbox 1454 memcpy((caddr_t)mbox64, (caddr_t)ccb->mbox64, 22); 1455 mbox->cmdid = scb->sno; 1456 1457 adapter->outstanding_cmds++; 1458 1459 if (scb->dma_direction == PCI_DMA_TODEVICE) 1460 pci_dma_sync_sg_for_device(adapter->pdev, 1461 scsi_sglist(scb->scp), 1462 scsi_sg_count(scb->scp), 1463 PCI_DMA_TODEVICE); 1464 1465 mbox->busy = 1; // Set busy 1466 mbox->poll = 0; 1467 mbox->ack = 0; 1468 wmb(); 1469 1470 WRINDOOR(raid_dev, raid_dev->mbox_dma | 0x1); 1471 1472 spin_unlock_irqrestore(MAILBOX_LOCK(raid_dev), flags); 1473 1474 return 0; 1475 } 1476 1477 1478 /** 1479 * megaraid_queue_command - generic queue entry point for all LLDs 1480 * @scp : pointer to the scsi command to be executed 1481 * @done : callback routine to be called after the cmd has be completed 1482 * 1483 * Queue entry point for mailbox based controllers. 1484 */ 1485 static int 1486 megaraid_queue_command(struct scsi_cmnd *scp, void (*done)(struct scsi_cmnd *)) 1487 { 1488 adapter_t *adapter; 1489 scb_t *scb; 1490 int if_busy; 1491 1492 adapter = SCP2ADAPTER(scp); 1493 scp->scsi_done = done; 1494 scp->result = 0; 1495 1496 /* 1497 * Allocate and build a SCB request 1498 * if_busy flag will be set if megaraid_mbox_build_cmd() command could 1499 * not allocate scb. We will return non-zero status in that case. 1500 * NOTE: scb can be null even though certain commands completed 1501 * successfully, e.g., MODE_SENSE and TEST_UNIT_READY, it would 1502 * return 0 in that case, and we would do the callback right away. 1503 */ 1504 if_busy = 0; 1505 scb = megaraid_mbox_build_cmd(adapter, scp, &if_busy); 1506 if (!scb) { // command already completed 1507 done(scp); 1508 return 0; 1509 } 1510 1511 megaraid_mbox_runpendq(adapter, scb); 1512 return if_busy; 1513 } 1514 1515 /** 1516 * megaraid_mbox_build_cmd - transform the mid-layer scsi commands 1517 * @adapter : controller's soft state 1518 * @scp : mid-layer scsi command pointer 1519 * @busy : set if request could not be completed because of lack of 1520 * resources 1521 * 1522 * Transform the mid-layer scsi command to megaraid firmware lingua. 1523 * Convert the command issued by mid-layer to format understood by megaraid 1524 * firmware. We also complete certain commands without sending them to firmware. 1525 */ 1526 static scb_t * 1527 megaraid_mbox_build_cmd(adapter_t *adapter, struct scsi_cmnd *scp, int *busy) 1528 { 1529 mraid_device_t *rdev = ADAP2RAIDDEV(adapter); 1530 int channel; 1531 int target; 1532 int islogical; 1533 mbox_ccb_t *ccb; 1534 mraid_passthru_t *pthru; 1535 mbox64_t *mbox64; 1536 mbox_t *mbox; 1537 scb_t *scb; 1538 char skip[] = "skipping"; 1539 char scan[] = "scanning"; 1540 char *ss; 1541 1542 1543 /* 1544 * Get the appropriate device map for the device this command is 1545 * intended for 1546 */ 1547 MRAID_GET_DEVICE_MAP(adapter, scp, channel, target, islogical); 1548 1549 /* 1550 * Logical drive commands 1551 */ 1552 if (islogical) { 1553 switch (scp->cmnd[0]) { 1554 case TEST_UNIT_READY: 1555 /* 1556 * Do we support clustering and is the support enabled 1557 * If no, return success always 1558 */ 1559 if (!adapter->ha) { 1560 scp->result = (DID_OK << 16); 1561 return NULL; 1562 } 1563 1564 if (!(scb = megaraid_alloc_scb(adapter, scp))) { 1565 scp->result = (DID_ERROR << 16); 1566 *busy = 1; 1567 return NULL; 1568 } 1569 1570 scb->dma_direction = scp->sc_data_direction; 1571 scb->dev_channel = 0xFF; 1572 scb->dev_target = target; 1573 ccb = (mbox_ccb_t *)scb->ccb; 1574 1575 /* 1576 * The command id will be provided by the command 1577 * issuance routine 1578 */ 1579 ccb->raw_mbox[0] = CLUSTER_CMD; 1580 ccb->raw_mbox[2] = RESERVATION_STATUS; 1581 ccb->raw_mbox[3] = target; 1582 1583 return scb; 1584 1585 case MODE_SENSE: 1586 { 1587 struct scatterlist *sgl; 1588 caddr_t vaddr; 1589 1590 sgl = scsi_sglist(scp); 1591 if (sg_page(sgl)) { 1592 vaddr = (caddr_t) sg_virt(&sgl[0]); 1593 1594 memset(vaddr, 0, scp->cmnd[4]); 1595 } 1596 else { 1597 con_log(CL_ANN, (KERN_WARNING 1598 "megaraid mailbox: invalid sg:%d\n", 1599 __LINE__)); 1600 } 1601 } 1602 scp->result = (DID_OK << 16); 1603 return NULL; 1604 1605 case INQUIRY: 1606 /* 1607 * Display the channel scan for logical drives 1608 * Do not display scan for a channel if already done. 1609 */ 1610 if (!(rdev->last_disp & (1L << SCP2CHANNEL(scp)))) { 1611 1612 con_log(CL_ANN, (KERN_INFO 1613 "scsi[%d]: scanning scsi channel %d", 1614 adapter->host->host_no, 1615 SCP2CHANNEL(scp))); 1616 1617 con_log(CL_ANN, ( 1618 " [virtual] for logical drives\n")); 1619 1620 rdev->last_disp |= (1L << SCP2CHANNEL(scp)); 1621 } 1622 1623 if (scp->cmnd[1] & MEGA_SCSI_INQ_EVPD) { 1624 scp->sense_buffer[0] = 0x70; 1625 scp->sense_buffer[2] = ILLEGAL_REQUEST; 1626 scp->sense_buffer[12] = MEGA_INVALID_FIELD_IN_CDB; 1627 scp->result = CHECK_CONDITION << 1; 1628 return NULL; 1629 } 1630 1631 /* Fall through */ 1632 1633 case READ_CAPACITY: 1634 /* 1635 * Do not allow LUN > 0 for logical drives and 1636 * requests for more than 40 logical drives 1637 */ 1638 if (SCP2LUN(scp)) { 1639 scp->result = (DID_BAD_TARGET << 16); 1640 return NULL; 1641 } 1642 if ((target % 0x80) >= MAX_LOGICAL_DRIVES_40LD) { 1643 scp->result = (DID_BAD_TARGET << 16); 1644 return NULL; 1645 } 1646 1647 1648 /* Allocate a SCB and initialize passthru */ 1649 if (!(scb = megaraid_alloc_scb(adapter, scp))) { 1650 scp->result = (DID_ERROR << 16); 1651 *busy = 1; 1652 return NULL; 1653 } 1654 1655 ccb = (mbox_ccb_t *)scb->ccb; 1656 scb->dev_channel = 0xFF; 1657 scb->dev_target = target; 1658 pthru = ccb->pthru; 1659 mbox = ccb->mbox; 1660 mbox64 = ccb->mbox64; 1661 1662 pthru->timeout = 0; 1663 pthru->ars = 1; 1664 pthru->reqsenselen = 14; 1665 pthru->islogical = 1; 1666 pthru->logdrv = target; 1667 pthru->cdblen = scp->cmd_len; 1668 memcpy(pthru->cdb, scp->cmnd, scp->cmd_len); 1669 1670 mbox->cmd = MBOXCMD_PASSTHRU64; 1671 scb->dma_direction = scp->sc_data_direction; 1672 1673 pthru->dataxferlen = scsi_bufflen(scp); 1674 pthru->dataxferaddr = ccb->sgl_dma_h; 1675 pthru->numsge = megaraid_mbox_mksgl(adapter, 1676 scb); 1677 1678 mbox->xferaddr = 0xFFFFFFFF; 1679 mbox64->xferaddr_lo = (uint32_t )ccb->pthru_dma_h; 1680 mbox64->xferaddr_hi = 0; 1681 1682 return scb; 1683 1684 case READ_6: 1685 case WRITE_6: 1686 case READ_10: 1687 case WRITE_10: 1688 case READ_12: 1689 case WRITE_12: 1690 1691 /* 1692 * Allocate a SCB and initialize mailbox 1693 */ 1694 if (!(scb = megaraid_alloc_scb(adapter, scp))) { 1695 scp->result = (DID_ERROR << 16); 1696 *busy = 1; 1697 return NULL; 1698 } 1699 ccb = (mbox_ccb_t *)scb->ccb; 1700 scb->dev_channel = 0xFF; 1701 scb->dev_target = target; 1702 mbox = ccb->mbox; 1703 mbox64 = ccb->mbox64; 1704 mbox->logdrv = target; 1705 1706 /* 1707 * A little HACK: 2nd bit is zero for all scsi read 1708 * commands and is set for all scsi write commands 1709 */ 1710 mbox->cmd = (scp->cmnd[0] & 0x02) ? MBOXCMD_LWRITE64: 1711 MBOXCMD_LREAD64 ; 1712 1713 /* 1714 * 6-byte READ(0x08) or WRITE(0x0A) cdb 1715 */ 1716 if (scp->cmd_len == 6) { 1717 mbox->numsectors = (uint32_t)scp->cmnd[4]; 1718 mbox->lba = 1719 ((uint32_t)scp->cmnd[1] << 16) | 1720 ((uint32_t)scp->cmnd[2] << 8) | 1721 (uint32_t)scp->cmnd[3]; 1722 1723 mbox->lba &= 0x1FFFFF; 1724 } 1725 1726 /* 1727 * 10-byte READ(0x28) or WRITE(0x2A) cdb 1728 */ 1729 else if (scp->cmd_len == 10) { 1730 mbox->numsectors = 1731 (uint32_t)scp->cmnd[8] | 1732 ((uint32_t)scp->cmnd[7] << 8); 1733 mbox->lba = 1734 ((uint32_t)scp->cmnd[2] << 24) | 1735 ((uint32_t)scp->cmnd[3] << 16) | 1736 ((uint32_t)scp->cmnd[4] << 8) | 1737 (uint32_t)scp->cmnd[5]; 1738 } 1739 1740 /* 1741 * 12-byte READ(0xA8) or WRITE(0xAA) cdb 1742 */ 1743 else if (scp->cmd_len == 12) { 1744 mbox->lba = 1745 ((uint32_t)scp->cmnd[2] << 24) | 1746 ((uint32_t)scp->cmnd[3] << 16) | 1747 ((uint32_t)scp->cmnd[4] << 8) | 1748 (uint32_t)scp->cmnd[5]; 1749 1750 mbox->numsectors = 1751 ((uint32_t)scp->cmnd[6] << 24) | 1752 ((uint32_t)scp->cmnd[7] << 16) | 1753 ((uint32_t)scp->cmnd[8] << 8) | 1754 (uint32_t)scp->cmnd[9]; 1755 } 1756 else { 1757 con_log(CL_ANN, (KERN_WARNING 1758 "megaraid: unsupported CDB length\n")); 1759 1760 megaraid_dealloc_scb(adapter, scb); 1761 1762 scp->result = (DID_ERROR << 16); 1763 return NULL; 1764 } 1765 1766 scb->dma_direction = scp->sc_data_direction; 1767 1768 // Calculate Scatter-Gather info 1769 mbox64->xferaddr_lo = (uint32_t )ccb->sgl_dma_h; 1770 mbox->numsge = megaraid_mbox_mksgl(adapter, 1771 scb); 1772 mbox->xferaddr = 0xFFFFFFFF; 1773 mbox64->xferaddr_hi = 0; 1774 1775 return scb; 1776 1777 case RESERVE: 1778 case RELEASE: 1779 /* 1780 * Do we support clustering and is the support enabled 1781 */ 1782 if (!adapter->ha) { 1783 scp->result = (DID_BAD_TARGET << 16); 1784 return NULL; 1785 } 1786 1787 /* 1788 * Allocate a SCB and initialize mailbox 1789 */ 1790 if (!(scb = megaraid_alloc_scb(adapter, scp))) { 1791 scp->result = (DID_ERROR << 16); 1792 *busy = 1; 1793 return NULL; 1794 } 1795 1796 ccb = (mbox_ccb_t *)scb->ccb; 1797 scb->dev_channel = 0xFF; 1798 scb->dev_target = target; 1799 ccb->raw_mbox[0] = CLUSTER_CMD; 1800 ccb->raw_mbox[2] = (scp->cmnd[0] == RESERVE) ? 1801 RESERVE_LD : RELEASE_LD; 1802 1803 ccb->raw_mbox[3] = target; 1804 scb->dma_direction = scp->sc_data_direction; 1805 1806 return scb; 1807 1808 default: 1809 scp->result = (DID_BAD_TARGET << 16); 1810 return NULL; 1811 } 1812 } 1813 else { // Passthru device commands 1814 1815 // Do not allow access to target id > 15 or LUN > 7 1816 if (target > 15 || SCP2LUN(scp) > 7) { 1817 scp->result = (DID_BAD_TARGET << 16); 1818 return NULL; 1819 } 1820 1821 // if fast load option was set and scan for last device is 1822 // over, reset the fast_load flag so that during a possible 1823 // next scan, devices can be made available 1824 if (rdev->fast_load && (target == 15) && 1825 (SCP2CHANNEL(scp) == adapter->max_channel -1)) { 1826 1827 con_log(CL_ANN, (KERN_INFO 1828 "megaraid[%d]: physical device scan re-enabled\n", 1829 adapter->host->host_no)); 1830 rdev->fast_load = 0; 1831 } 1832 1833 /* 1834 * Display the channel scan for physical devices 1835 */ 1836 if (!(rdev->last_disp & (1L << SCP2CHANNEL(scp)))) { 1837 1838 ss = rdev->fast_load ? skip : scan; 1839 1840 con_log(CL_ANN, (KERN_INFO 1841 "scsi[%d]: %s scsi channel %d [Phy %d]", 1842 adapter->host->host_no, ss, SCP2CHANNEL(scp), 1843 channel)); 1844 1845 con_log(CL_ANN, ( 1846 " for non-raid devices\n")); 1847 1848 rdev->last_disp |= (1L << SCP2CHANNEL(scp)); 1849 } 1850 1851 // disable channel sweep if fast load option given 1852 if (rdev->fast_load) { 1853 scp->result = (DID_BAD_TARGET << 16); 1854 return NULL; 1855 } 1856 1857 // Allocate a SCB and initialize passthru 1858 if (!(scb = megaraid_alloc_scb(adapter, scp))) { 1859 scp->result = (DID_ERROR << 16); 1860 *busy = 1; 1861 return NULL; 1862 } 1863 1864 ccb = (mbox_ccb_t *)scb->ccb; 1865 scb->dev_channel = channel; 1866 scb->dev_target = target; 1867 scb->dma_direction = scp->sc_data_direction; 1868 mbox = ccb->mbox; 1869 mbox64 = ccb->mbox64; 1870 1871 // Does this firmware support extended CDBs 1872 if (adapter->max_cdb_sz == 16) { 1873 mbox->cmd = MBOXCMD_EXTPTHRU; 1874 1875 megaraid_mbox_prepare_epthru(adapter, scb, scp); 1876 1877 mbox64->xferaddr_lo = (uint32_t)ccb->epthru_dma_h; 1878 mbox64->xferaddr_hi = 0; 1879 mbox->xferaddr = 0xFFFFFFFF; 1880 } 1881 else { 1882 mbox->cmd = MBOXCMD_PASSTHRU64; 1883 1884 megaraid_mbox_prepare_pthru(adapter, scb, scp); 1885 1886 mbox64->xferaddr_lo = (uint32_t)ccb->pthru_dma_h; 1887 mbox64->xferaddr_hi = 0; 1888 mbox->xferaddr = 0xFFFFFFFF; 1889 } 1890 return scb; 1891 } 1892 1893 // NOT REACHED 1894 } 1895 1896 1897 /** 1898 * megaraid_mbox_runpendq - execute commands queued in the pending queue 1899 * @adapter : controller's soft state 1900 * @scb_q : SCB to be queued in the pending list 1901 * 1902 * Scan the pending list for commands which are not yet issued and try to 1903 * post to the controller. The SCB can be a null pointer, which would indicate 1904 * no SCB to be queue, just try to execute the ones in the pending list. 1905 * 1906 * NOTE: We do not actually traverse the pending list. The SCBs are plucked 1907 * out from the head of the pending list. If it is successfully issued, the 1908 * next SCB is at the head now. 1909 */ 1910 static void 1911 megaraid_mbox_runpendq(adapter_t *adapter, scb_t *scb_q) 1912 { 1913 scb_t *scb; 1914 unsigned long flags; 1915 1916 spin_lock_irqsave(PENDING_LIST_LOCK(adapter), flags); 1917 1918 if (scb_q) { 1919 scb_q->state = SCB_PENDQ; 1920 list_add_tail(&scb_q->list, &adapter->pend_list); 1921 } 1922 1923 // if the adapter in not in quiescent mode, post the commands to FW 1924 if (adapter->quiescent) { 1925 spin_unlock_irqrestore(PENDING_LIST_LOCK(adapter), flags); 1926 return; 1927 } 1928 1929 while (!list_empty(&adapter->pend_list)) { 1930 1931 assert_spin_locked(PENDING_LIST_LOCK(adapter)); 1932 1933 scb = list_entry(adapter->pend_list.next, scb_t, list); 1934 1935 // remove the scb from the pending list and try to 1936 // issue. If we are unable to issue it, put back in 1937 // the pending list and return 1938 1939 list_del_init(&scb->list); 1940 1941 spin_unlock_irqrestore(PENDING_LIST_LOCK(adapter), flags); 1942 1943 // if mailbox was busy, return SCB back to pending 1944 // list. Make sure to add at the head, since that's 1945 // where it would have been removed from 1946 1947 scb->state = SCB_ISSUED; 1948 1949 if (mbox_post_cmd(adapter, scb) != 0) { 1950 1951 spin_lock_irqsave(PENDING_LIST_LOCK(adapter), flags); 1952 1953 scb->state = SCB_PENDQ; 1954 1955 list_add(&scb->list, &adapter->pend_list); 1956 1957 spin_unlock_irqrestore(PENDING_LIST_LOCK(adapter), 1958 flags); 1959 1960 return; 1961 } 1962 1963 spin_lock_irqsave(PENDING_LIST_LOCK(adapter), flags); 1964 } 1965 1966 spin_unlock_irqrestore(PENDING_LIST_LOCK(adapter), flags); 1967 1968 1969 return; 1970 } 1971 1972 1973 /** 1974 * megaraid_mbox_prepare_pthru - prepare a command for physical devices 1975 * @adapter : pointer to controller's soft state 1976 * @scb : scsi control block 1977 * @scp : scsi command from the mid-layer 1978 * 1979 * Prepare a command for the scsi physical devices. 1980 */ 1981 static void 1982 megaraid_mbox_prepare_pthru(adapter_t *adapter, scb_t *scb, 1983 struct scsi_cmnd *scp) 1984 { 1985 mbox_ccb_t *ccb; 1986 mraid_passthru_t *pthru; 1987 uint8_t channel; 1988 uint8_t target; 1989 1990 ccb = (mbox_ccb_t *)scb->ccb; 1991 pthru = ccb->pthru; 1992 channel = scb->dev_channel; 1993 target = scb->dev_target; 1994 1995 // 0=6sec, 1=60sec, 2=10min, 3=3hrs, 4=NO timeout 1996 pthru->timeout = 4; 1997 pthru->ars = 1; 1998 pthru->islogical = 0; 1999 pthru->channel = 0; 2000 pthru->target = (channel << 4) | target; 2001 pthru->logdrv = SCP2LUN(scp); 2002 pthru->reqsenselen = 14; 2003 pthru->cdblen = scp->cmd_len; 2004 2005 memcpy(pthru->cdb, scp->cmnd, scp->cmd_len); 2006 2007 if (scsi_bufflen(scp)) { 2008 pthru->dataxferlen = scsi_bufflen(scp); 2009 pthru->dataxferaddr = ccb->sgl_dma_h; 2010 pthru->numsge = megaraid_mbox_mksgl(adapter, scb); 2011 } 2012 else { 2013 pthru->dataxferaddr = 0; 2014 pthru->dataxferlen = 0; 2015 pthru->numsge = 0; 2016 } 2017 return; 2018 } 2019 2020 2021 /** 2022 * megaraid_mbox_prepare_epthru - prepare a command for physical devices 2023 * @adapter : pointer to controller's soft state 2024 * @scb : scsi control block 2025 * @scp : scsi command from the mid-layer 2026 * 2027 * Prepare a command for the scsi physical devices. This rountine prepares 2028 * commands for devices which can take extended CDBs (>10 bytes). 2029 */ 2030 static void 2031 megaraid_mbox_prepare_epthru(adapter_t *adapter, scb_t *scb, 2032 struct scsi_cmnd *scp) 2033 { 2034 mbox_ccb_t *ccb; 2035 mraid_epassthru_t *epthru; 2036 uint8_t channel; 2037 uint8_t target; 2038 2039 ccb = (mbox_ccb_t *)scb->ccb; 2040 epthru = ccb->epthru; 2041 channel = scb->dev_channel; 2042 target = scb->dev_target; 2043 2044 // 0=6sec, 1=60sec, 2=10min, 3=3hrs, 4=NO timeout 2045 epthru->timeout = 4; 2046 epthru->ars = 1; 2047 epthru->islogical = 0; 2048 epthru->channel = 0; 2049 epthru->target = (channel << 4) | target; 2050 epthru->logdrv = SCP2LUN(scp); 2051 epthru->reqsenselen = 14; 2052 epthru->cdblen = scp->cmd_len; 2053 2054 memcpy(epthru->cdb, scp->cmnd, scp->cmd_len); 2055 2056 if (scsi_bufflen(scp)) { 2057 epthru->dataxferlen = scsi_bufflen(scp); 2058 epthru->dataxferaddr = ccb->sgl_dma_h; 2059 epthru->numsge = megaraid_mbox_mksgl(adapter, scb); 2060 } 2061 else { 2062 epthru->dataxferaddr = 0; 2063 epthru->dataxferlen = 0; 2064 epthru->numsge = 0; 2065 } 2066 return; 2067 } 2068 2069 2070 /** 2071 * megaraid_ack_sequence - interrupt ack sequence for memory mapped HBAs 2072 * @adapter : controller's soft state 2073 * 2074 * Interrupt acknowledgement sequence for memory mapped HBAs. Find out the 2075 * completed command and put them on the completed list for later processing. 2076 * 2077 * Returns: 1 if the interrupt is valid, 0 otherwise 2078 */ 2079 static int 2080 megaraid_ack_sequence(adapter_t *adapter) 2081 { 2082 mraid_device_t *raid_dev = ADAP2RAIDDEV(adapter); 2083 mbox_t *mbox; 2084 scb_t *scb; 2085 uint8_t nstatus; 2086 uint8_t completed[MBOX_MAX_FIRMWARE_STATUS]; 2087 struct list_head clist; 2088 int handled; 2089 uint32_t dword; 2090 unsigned long flags; 2091 int i, j; 2092 2093 2094 mbox = raid_dev->mbox; 2095 2096 // move the SCBs from the firmware completed array to our local list 2097 INIT_LIST_HEAD(&clist); 2098 2099 // loop till F/W has more commands for us to complete 2100 handled = 0; 2101 spin_lock_irqsave(MAILBOX_LOCK(raid_dev), flags); 2102 do { 2103 /* 2104 * Check if a valid interrupt is pending. If found, force the 2105 * interrupt line low. 2106 */ 2107 dword = RDOUTDOOR(raid_dev); 2108 if (dword != 0x10001234) break; 2109 2110 handled = 1; 2111 2112 WROUTDOOR(raid_dev, 0x10001234); 2113 2114 nstatus = 0; 2115 // wait for valid numstatus to post 2116 for (i = 0; i < 0xFFFFF; i++) { 2117 if (mbox->numstatus != 0xFF) { 2118 nstatus = mbox->numstatus; 2119 break; 2120 } 2121 rmb(); 2122 } 2123 mbox->numstatus = 0xFF; 2124 2125 adapter->outstanding_cmds -= nstatus; 2126 2127 for (i = 0; i < nstatus; i++) { 2128 2129 // wait for valid command index to post 2130 for (j = 0; j < 0xFFFFF; j++) { 2131 if (mbox->completed[i] != 0xFF) break; 2132 rmb(); 2133 } 2134 completed[i] = mbox->completed[i]; 2135 mbox->completed[i] = 0xFF; 2136 2137 if (completed[i] == 0xFF) { 2138 con_log(CL_ANN, (KERN_CRIT 2139 "megaraid: command posting timed out\n")); 2140 2141 BUG(); 2142 continue; 2143 } 2144 2145 // Get SCB associated with this command id 2146 if (completed[i] >= MBOX_MAX_SCSI_CMDS) { 2147 // a cmm command 2148 scb = adapter->uscb_list + (completed[i] - 2149 MBOX_MAX_SCSI_CMDS); 2150 } 2151 else { 2152 // an os command 2153 scb = adapter->kscb_list + completed[i]; 2154 } 2155 2156 scb->status = mbox->status; 2157 list_add_tail(&scb->list, &clist); 2158 } 2159 2160 // Acknowledge interrupt 2161 WRINDOOR(raid_dev, 0x02); 2162 2163 } while(1); 2164 2165 spin_unlock_irqrestore(MAILBOX_LOCK(raid_dev), flags); 2166 2167 2168 // put the completed commands in the completed list. DPC would 2169 // complete these commands later 2170 spin_lock_irqsave(COMPLETED_LIST_LOCK(adapter), flags); 2171 2172 list_splice(&clist, &adapter->completed_list); 2173 2174 spin_unlock_irqrestore(COMPLETED_LIST_LOCK(adapter), flags); 2175 2176 2177 // schedule the DPC if there is some work for it 2178 if (handled) 2179 tasklet_schedule(&adapter->dpc_h); 2180 2181 return handled; 2182 } 2183 2184 2185 /** 2186 * megaraid_isr - isr for memory based mailbox based controllers 2187 * @irq : irq 2188 * @devp : pointer to our soft state 2189 * 2190 * Interrupt service routine for memory-mapped mailbox controllers. 2191 */ 2192 static irqreturn_t 2193 megaraid_isr(int irq, void *devp) 2194 { 2195 adapter_t *adapter = devp; 2196 int handled; 2197 2198 handled = megaraid_ack_sequence(adapter); 2199 2200 /* Loop through any pending requests */ 2201 if (!adapter->quiescent) { 2202 megaraid_mbox_runpendq(adapter, NULL); 2203 } 2204 2205 return IRQ_RETVAL(handled); 2206 } 2207 2208 2209 /** 2210 * megaraid_mbox_sync_scb - sync kernel buffers 2211 * @adapter : controller's soft state 2212 * @scb : pointer to the resource packet 2213 * 2214 * DMA sync if required. 2215 */ 2216 static void 2217 megaraid_mbox_sync_scb(adapter_t *adapter, scb_t *scb) 2218 { 2219 mbox_ccb_t *ccb; 2220 2221 ccb = (mbox_ccb_t *)scb->ccb; 2222 2223 if (scb->dma_direction == PCI_DMA_FROMDEVICE) 2224 pci_dma_sync_sg_for_cpu(adapter->pdev, 2225 scsi_sglist(scb->scp), 2226 scsi_sg_count(scb->scp), 2227 PCI_DMA_FROMDEVICE); 2228 2229 scsi_dma_unmap(scb->scp); 2230 return; 2231 } 2232 2233 2234 /** 2235 * megaraid_mbox_dpc - the tasklet to complete the commands from completed list 2236 * @devp : pointer to HBA soft state 2237 * 2238 * Pick up the commands from the completed list and send back to the owners. 2239 * This is a reentrant function and does not assume any locks are held while 2240 * it is being called. 2241 */ 2242 static void 2243 megaraid_mbox_dpc(unsigned long devp) 2244 { 2245 adapter_t *adapter = (adapter_t *)devp; 2246 mraid_device_t *raid_dev; 2247 struct list_head clist; 2248 struct scatterlist *sgl; 2249 scb_t *scb; 2250 scb_t *tmp; 2251 struct scsi_cmnd *scp; 2252 mraid_passthru_t *pthru; 2253 mraid_epassthru_t *epthru; 2254 mbox_ccb_t *ccb; 2255 int islogical; 2256 int pdev_index; 2257 int pdev_state; 2258 mbox_t *mbox; 2259 unsigned long flags; 2260 uint8_t c; 2261 int status; 2262 uioc_t *kioc; 2263 2264 2265 if (!adapter) return; 2266 2267 raid_dev = ADAP2RAIDDEV(adapter); 2268 2269 // move the SCBs from the completed list to our local list 2270 INIT_LIST_HEAD(&clist); 2271 2272 spin_lock_irqsave(COMPLETED_LIST_LOCK(adapter), flags); 2273 2274 list_splice_init(&adapter->completed_list, &clist); 2275 2276 spin_unlock_irqrestore(COMPLETED_LIST_LOCK(adapter), flags); 2277 2278 2279 list_for_each_entry_safe(scb, tmp, &clist, list) { 2280 2281 status = scb->status; 2282 scp = scb->scp; 2283 ccb = (mbox_ccb_t *)scb->ccb; 2284 pthru = ccb->pthru; 2285 epthru = ccb->epthru; 2286 mbox = ccb->mbox; 2287 2288 // Make sure f/w has completed a valid command 2289 if (scb->state != SCB_ISSUED) { 2290 con_log(CL_ANN, (KERN_CRIT 2291 "megaraid critical err: invalid command %d:%d:%p\n", 2292 scb->sno, scb->state, scp)); 2293 BUG(); 2294 continue; // Must never happen! 2295 } 2296 2297 // check for the management command and complete it right away 2298 if (scb->sno >= MBOX_MAX_SCSI_CMDS) { 2299 scb->state = SCB_FREE; 2300 scb->status = status; 2301 2302 // remove from local clist 2303 list_del_init(&scb->list); 2304 2305 kioc = (uioc_t *)scb->gp; 2306 kioc->status = 0; 2307 2308 megaraid_mbox_mm_done(adapter, scb); 2309 2310 continue; 2311 } 2312 2313 // Was an abort issued for this command earlier 2314 if (scb->state & SCB_ABORT) { 2315 con_log(CL_ANN, (KERN_NOTICE 2316 "megaraid: aborted cmd %lx[%x] completed\n", 2317 scp->serial_number, scb->sno)); 2318 } 2319 2320 /* 2321 * If the inquiry came of a disk drive which is not part of 2322 * any RAID array, expose it to the kernel. For this to be 2323 * enabled, user must set the "megaraid_expose_unconf_disks" 2324 * flag to 1 by specifying it on module parameter list. 2325 * This would enable data migration off drives from other 2326 * configurations. 2327 */ 2328 islogical = MRAID_IS_LOGICAL(adapter, scp); 2329 if (scp->cmnd[0] == INQUIRY && status == 0 && islogical == 0 2330 && IS_RAID_CH(raid_dev, scb->dev_channel)) { 2331 2332 sgl = scsi_sglist(scp); 2333 if (sg_page(sgl)) { 2334 c = *(unsigned char *) sg_virt(&sgl[0]); 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 successfully\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", __func__, 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 * Newer firmware on Dell CERC expect a different 3178 * random deletion handling, so disable it. 3179 */ 3180 if (adapter->pdev->vendor == PCI_VENDOR_ID_AMI && 3181 adapter->pdev->device == PCI_DEVICE_ID_AMI_MEGARAID3 && 3182 adapter->pdev->subsystem_vendor == PCI_VENDOR_ID_DELL && 3183 adapter->pdev->subsystem_device == PCI_SUBSYS_ID_CERC_ATA100_4CH && 3184 (adapter->fw_version[0] > '6' || 3185 (adapter->fw_version[0] == '6' && 3186 adapter->fw_version[2] > '6') || 3187 (adapter->fw_version[0] == '6' 3188 && adapter->fw_version[2] == '6' 3189 && adapter->fw_version[3] > '1'))) { 3190 con_log(CL_DLEVEL1, ("megaraid: disable random deletion\n")); 3191 return 0; 3192 } 3193 3194 mbox = (mbox_t *)raw_mbox; 3195 3196 memset((caddr_t)raw_mbox, 0, sizeof(mbox_t)); 3197 3198 raw_mbox[0] = FC_DEL_LOGDRV; 3199 raw_mbox[2] = OP_SUP_DEL_LOGDRV; 3200 3201 // Issue the command 3202 rval = 0; 3203 if (mbox_post_sync_cmd(adapter, raw_mbox) == 0) { 3204 3205 con_log(CL_DLEVEL1, ("megaraid: supports random deletion\n")); 3206 3207 rval = 1; 3208 } 3209 3210 return rval; 3211 } 3212 3213 3214 /** 3215 * megaraid_mbox_get_max_sg - maximum sg elements supported by the firmware 3216 * @adapter : soft state for the controller 3217 * 3218 * Find out the maximum number of scatter-gather elements supported by the 3219 * firmware. 3220 */ 3221 static int 3222 megaraid_mbox_get_max_sg(adapter_t *adapter) 3223 { 3224 mbox_t *mbox; 3225 uint8_t raw_mbox[sizeof(mbox_t)]; 3226 int nsg; 3227 3228 3229 mbox = (mbox_t *)raw_mbox; 3230 3231 memset((caddr_t)raw_mbox, 0, sizeof(mbox_t)); 3232 3233 mbox->xferaddr = (uint32_t)adapter->ibuf_dma_h; 3234 3235 memset((void *)adapter->ibuf, 0, MBOX_IBUF_SIZE); 3236 3237 raw_mbox[0] = MAIN_MISC_OPCODE; 3238 raw_mbox[2] = GET_MAX_SG_SUPPORT; 3239 3240 // Issue the command 3241 if (mbox_post_sync_cmd(adapter, raw_mbox) == 0) { 3242 nsg = *(uint8_t *)adapter->ibuf; 3243 } 3244 else { 3245 nsg = MBOX_DEFAULT_SG_SIZE; 3246 } 3247 3248 if (nsg > MBOX_MAX_SG_SIZE) nsg = MBOX_MAX_SG_SIZE; 3249 3250 return nsg; 3251 } 3252 3253 3254 /** 3255 * megaraid_mbox_enum_raid_scsi - enumerate the RAID and SCSI channels 3256 * @adapter : soft state for the controller 3257 * 3258 * Enumerate the RAID and SCSI channels for ROMB platforms so that channels 3259 * can be exported as regular SCSI channels. 3260 */ 3261 static void 3262 megaraid_mbox_enum_raid_scsi(adapter_t *adapter) 3263 { 3264 mraid_device_t *raid_dev = ADAP2RAIDDEV(adapter); 3265 mbox_t *mbox; 3266 uint8_t raw_mbox[sizeof(mbox_t)]; 3267 3268 3269 mbox = (mbox_t *)raw_mbox; 3270 3271 memset((caddr_t)raw_mbox, 0, sizeof(mbox_t)); 3272 3273 mbox->xferaddr = (uint32_t)adapter->ibuf_dma_h; 3274 3275 memset((void *)adapter->ibuf, 0, MBOX_IBUF_SIZE); 3276 3277 raw_mbox[0] = CHNL_CLASS; 3278 raw_mbox[2] = GET_CHNL_CLASS; 3279 3280 // Issue the command. If the command fails, all channels are RAID 3281 // channels 3282 raid_dev->channel_class = 0xFF; 3283 if (mbox_post_sync_cmd(adapter, raw_mbox) == 0) { 3284 raid_dev->channel_class = *(uint8_t *)adapter->ibuf; 3285 } 3286 3287 return; 3288 } 3289 3290 3291 /** 3292 * megaraid_mbox_flush_cache - flush adapter and disks cache 3293 * @adapter : soft state for the controller 3294 * 3295 * Flush adapter cache followed by disks cache. 3296 */ 3297 static void 3298 megaraid_mbox_flush_cache(adapter_t *adapter) 3299 { 3300 mbox_t *mbox; 3301 uint8_t raw_mbox[sizeof(mbox_t)]; 3302 3303 3304 mbox = (mbox_t *)raw_mbox; 3305 3306 memset((caddr_t)raw_mbox, 0, sizeof(mbox_t)); 3307 3308 raw_mbox[0] = FLUSH_ADAPTER; 3309 3310 if (mbox_post_sync_cmd(adapter, raw_mbox) != 0) { 3311 con_log(CL_ANN, ("megaraid: flush adapter failed\n")); 3312 } 3313 3314 raw_mbox[0] = FLUSH_SYSTEM; 3315 3316 if (mbox_post_sync_cmd(adapter, raw_mbox) != 0) { 3317 con_log(CL_ANN, ("megaraid: flush disks cache failed\n")); 3318 } 3319 3320 return; 3321 } 3322 3323 3324 /** 3325 * megaraid_mbox_fire_sync_cmd - fire the sync cmd 3326 * @adapter : soft state for the controller 3327 * 3328 * Clears the pending cmds in FW and reinits its RAID structs. 3329 */ 3330 static int 3331 megaraid_mbox_fire_sync_cmd(adapter_t *adapter) 3332 { 3333 mbox_t *mbox; 3334 uint8_t raw_mbox[sizeof(mbox_t)]; 3335 mraid_device_t *raid_dev = ADAP2RAIDDEV(adapter); 3336 mbox64_t *mbox64; 3337 int status = 0; 3338 int i; 3339 uint32_t dword; 3340 3341 mbox = (mbox_t *)raw_mbox; 3342 3343 memset((caddr_t)raw_mbox, 0, sizeof(mbox_t)); 3344 3345 raw_mbox[0] = 0xFF; 3346 3347 mbox64 = raid_dev->mbox64; 3348 mbox = raid_dev->mbox; 3349 3350 /* Wait until mailbox is free */ 3351 if (megaraid_busywait_mbox(raid_dev) != 0) { 3352 status = 1; 3353 goto blocked_mailbox; 3354 } 3355 3356 /* Copy mailbox data into host structure */ 3357 memcpy((caddr_t)mbox, (caddr_t)raw_mbox, 16); 3358 mbox->cmdid = 0xFE; 3359 mbox->busy = 1; 3360 mbox->poll = 0; 3361 mbox->ack = 0; 3362 mbox->numstatus = 0; 3363 mbox->status = 0; 3364 3365 wmb(); 3366 WRINDOOR(raid_dev, raid_dev->mbox_dma | 0x1); 3367 3368 /* Wait for maximum 1 min for status to post. 3369 * If the Firmware SUPPORTS the ABOVE COMMAND, 3370 * mbox->cmd will be set to 0 3371 * else 3372 * the firmware will reject the command with 3373 * mbox->numstatus set to 1 3374 */ 3375 3376 i = 0; 3377 status = 0; 3378 while (!mbox->numstatus && mbox->cmd == 0xFF) { 3379 rmb(); 3380 msleep(1); 3381 i++; 3382 if (i > 1000 * 60) { 3383 status = 1; 3384 break; 3385 } 3386 } 3387 if (mbox->numstatus == 1) 3388 status = 1; /*cmd not supported*/ 3389 3390 /* Check for interrupt line */ 3391 dword = RDOUTDOOR(raid_dev); 3392 WROUTDOOR(raid_dev, dword); 3393 WRINDOOR(raid_dev,2); 3394 3395 return status; 3396 3397 blocked_mailbox: 3398 con_log(CL_ANN, (KERN_WARNING "megaraid: blocked mailbox\n")); 3399 return status; 3400 } 3401 3402 /** 3403 * megaraid_mbox_display_scb - display SCB information, mostly debug purposes 3404 * @adapter : controller's soft state 3405 * @scb : SCB to be displayed 3406 * @level : debug level for console print 3407 * 3408 * Diplay information about the given SCB iff the current debug level is 3409 * verbose. 3410 */ 3411 static void 3412 megaraid_mbox_display_scb(adapter_t *adapter, scb_t *scb) 3413 { 3414 mbox_ccb_t *ccb; 3415 struct scsi_cmnd *scp; 3416 mbox_t *mbox; 3417 int level; 3418 int i; 3419 3420 3421 ccb = (mbox_ccb_t *)scb->ccb; 3422 scp = scb->scp; 3423 mbox = ccb->mbox; 3424 3425 level = CL_DLEVEL3; 3426 3427 con_log(level, (KERN_NOTICE 3428 "megaraid mailbox: status:%#x cmd:%#x id:%#x ", scb->status, 3429 mbox->cmd, scb->sno)); 3430 3431 con_log(level, ("sec:%#x lba:%#x addr:%#x ld:%d sg:%d\n", 3432 mbox->numsectors, mbox->lba, mbox->xferaddr, mbox->logdrv, 3433 mbox->numsge)); 3434 3435 if (!scp) return; 3436 3437 con_log(level, (KERN_NOTICE "scsi cmnd: ")); 3438 3439 for (i = 0; i < scp->cmd_len; i++) { 3440 con_log(level, ("%#2.02x ", scp->cmnd[i])); 3441 } 3442 3443 con_log(level, ("\n")); 3444 3445 return; 3446 } 3447 3448 3449 /** 3450 * megaraid_mbox_setup_device_map - manage device ids 3451 * @adapter : Driver's soft state 3452 * 3453 * Manange the device ids to have an appropraite mapping between the kernel 3454 * scsi addresses and megaraid scsi and logical drive addresses. We export 3455 * scsi devices on their actual addresses, whereas the logical drives are 3456 * exported on a virtual scsi channel. 3457 */ 3458 static void 3459 megaraid_mbox_setup_device_map(adapter_t *adapter) 3460 { 3461 uint8_t c; 3462 uint8_t t; 3463 3464 /* 3465 * First fill the values on the logical drive channel 3466 */ 3467 for (t = 0; t < LSI_MAX_LOGICAL_DRIVES_64LD; t++) 3468 adapter->device_ids[adapter->max_channel][t] = 3469 (t < adapter->init_id) ? t : t - 1; 3470 3471 adapter->device_ids[adapter->max_channel][adapter->init_id] = 0xFF; 3472 3473 /* 3474 * Fill the values on the physical devices channels 3475 */ 3476 for (c = 0; c < adapter->max_channel; c++) 3477 for (t = 0; t < LSI_MAX_LOGICAL_DRIVES_64LD; t++) 3478 adapter->device_ids[c][t] = (c << 8) | t; 3479 } 3480 3481 3482 /* 3483 * END: internal commands library 3484 */ 3485 3486 /* 3487 * START: Interface for the common management module 3488 * 3489 * This is the module, which interfaces with the common management module to 3490 * provide support for ioctl and sysfs 3491 */ 3492 3493 /** 3494 * megaraid_cmm_register - register with the management module 3495 * @adapter : HBA soft state 3496 * 3497 * Register with the management module, which allows applications to issue 3498 * ioctl calls to the drivers. This interface is used by the management module 3499 * to setup sysfs support as well. 3500 */ 3501 static int 3502 megaraid_cmm_register(adapter_t *adapter) 3503 { 3504 mraid_device_t *raid_dev = ADAP2RAIDDEV(adapter); 3505 mraid_mmadp_t adp; 3506 scb_t *scb; 3507 mbox_ccb_t *ccb; 3508 int rval; 3509 int i; 3510 3511 // Allocate memory for the base list of scb for management module. 3512 adapter->uscb_list = kcalloc(MBOX_MAX_USER_CMDS, sizeof(scb_t), GFP_KERNEL); 3513 3514 if (adapter->uscb_list == NULL) { 3515 con_log(CL_ANN, (KERN_WARNING 3516 "megaraid: out of memory, %s %d\n", __func__, 3517 __LINE__)); 3518 return -1; 3519 } 3520 3521 3522 // Initialize the synchronization parameters for resources for 3523 // commands for management module 3524 INIT_LIST_HEAD(&adapter->uscb_pool); 3525 3526 spin_lock_init(USER_FREE_LIST_LOCK(adapter)); 3527 3528 3529 3530 // link all the packets. Note, CCB for commands, coming from the 3531 // commom management module, mailbox physical address are already 3532 // setup by it. We just need placeholder for that in our local command 3533 // control blocks 3534 for (i = 0; i < MBOX_MAX_USER_CMDS; i++) { 3535 3536 scb = adapter->uscb_list + i; 3537 ccb = raid_dev->uccb_list + i; 3538 3539 scb->ccb = (caddr_t)ccb; 3540 ccb->mbox64 = raid_dev->umbox64 + i; 3541 ccb->mbox = &ccb->mbox64->mbox32; 3542 ccb->raw_mbox = (uint8_t *)ccb->mbox; 3543 3544 scb->gp = 0; 3545 3546 // COMMAND ID 0 - (MBOX_MAX_SCSI_CMDS-1) ARE RESERVED FOR 3547 // COMMANDS COMING FROM IO SUBSYSTEM (MID-LAYER) 3548 scb->sno = i + MBOX_MAX_SCSI_CMDS; 3549 3550 scb->scp = NULL; 3551 scb->state = SCB_FREE; 3552 scb->dma_direction = PCI_DMA_NONE; 3553 scb->dma_type = MRAID_DMA_NONE; 3554 scb->dev_channel = -1; 3555 scb->dev_target = -1; 3556 3557 // put scb in the free pool 3558 list_add_tail(&scb->list, &adapter->uscb_pool); 3559 } 3560 3561 adp.unique_id = adapter->unique_id; 3562 adp.drvr_type = DRVRTYPE_MBOX; 3563 adp.drvr_data = (unsigned long)adapter; 3564 adp.pdev = adapter->pdev; 3565 adp.issue_uioc = megaraid_mbox_mm_handler; 3566 adp.timeout = MBOX_RESET_WAIT + MBOX_RESET_EXT_WAIT; 3567 adp.max_kioc = MBOX_MAX_USER_CMDS; 3568 3569 if ((rval = mraid_mm_register_adp(&adp)) != 0) { 3570 3571 con_log(CL_ANN, (KERN_WARNING 3572 "megaraid mbox: did not register with CMM\n")); 3573 3574 kfree(adapter->uscb_list); 3575 } 3576 3577 return rval; 3578 } 3579 3580 3581 /** 3582 * megaraid_cmm_unregister - un-register with the management module 3583 * @adapter : HBA soft state 3584 * 3585 * Un-register with the management module. 3586 * FIXME: mgmt module must return failure for unregister if it has pending 3587 * commands in LLD. 3588 */ 3589 static int 3590 megaraid_cmm_unregister(adapter_t *adapter) 3591 { 3592 kfree(adapter->uscb_list); 3593 mraid_mm_unregister_adp(adapter->unique_id); 3594 return 0; 3595 } 3596 3597 3598 /** 3599 * megaraid_mbox_mm_handler - interface for CMM to issue commands to LLD 3600 * @drvr_data : LLD specific data 3601 * @kioc : CMM interface packet 3602 * @action : command action 3603 * 3604 * This routine is invoked whenever the Common Management Module (CMM) has a 3605 * command for us. The 'action' parameter specifies if this is a new command 3606 * or otherwise. 3607 */ 3608 static int 3609 megaraid_mbox_mm_handler(unsigned long drvr_data, uioc_t *kioc, uint32_t action) 3610 { 3611 adapter_t *adapter; 3612 3613 if (action != IOCTL_ISSUE) { 3614 con_log(CL_ANN, (KERN_WARNING 3615 "megaraid: unsupported management action:%#2x\n", 3616 action)); 3617 return (-ENOTSUPP); 3618 } 3619 3620 adapter = (adapter_t *)drvr_data; 3621 3622 // make sure this adapter is not being detached right now. 3623 if (atomic_read(&adapter->being_detached)) { 3624 con_log(CL_ANN, (KERN_WARNING 3625 "megaraid: reject management request, detaching\n")); 3626 return (-ENODEV); 3627 } 3628 3629 switch (kioc->opcode) { 3630 3631 case GET_ADAP_INFO: 3632 3633 kioc->status = gather_hbainfo(adapter, (mraid_hba_info_t *) 3634 (unsigned long)kioc->buf_vaddr); 3635 3636 kioc->done(kioc); 3637 3638 return kioc->status; 3639 3640 case MBOX_CMD: 3641 3642 return megaraid_mbox_mm_command(adapter, kioc); 3643 3644 default: 3645 kioc->status = (-EINVAL); 3646 kioc->done(kioc); 3647 return (-EINVAL); 3648 } 3649 3650 return 0; // not reached 3651 } 3652 3653 /** 3654 * megaraid_mbox_mm_command - issues commands routed through CMM 3655 * @adapter : HBA soft state 3656 * @kioc : management command packet 3657 * 3658 * Issues commands, which are routed through the management module. 3659 */ 3660 static int 3661 megaraid_mbox_mm_command(adapter_t *adapter, uioc_t *kioc) 3662 { 3663 struct list_head *head = &adapter->uscb_pool; 3664 mbox64_t *mbox64; 3665 uint8_t *raw_mbox; 3666 scb_t *scb; 3667 mbox_ccb_t *ccb; 3668 unsigned long flags; 3669 3670 // detach one scb from free pool 3671 spin_lock_irqsave(USER_FREE_LIST_LOCK(adapter), flags); 3672 3673 if (list_empty(head)) { // should never happen because of CMM 3674 3675 con_log(CL_ANN, (KERN_WARNING 3676 "megaraid mbox: bug in cmm handler, lost resources\n")); 3677 3678 spin_unlock_irqrestore(USER_FREE_LIST_LOCK(adapter), flags); 3679 3680 return (-EINVAL); 3681 } 3682 3683 scb = list_entry(head->next, scb_t, list); 3684 list_del_init(&scb->list); 3685 3686 spin_unlock_irqrestore(USER_FREE_LIST_LOCK(adapter), flags); 3687 3688 scb->state = SCB_ACTIVE; 3689 scb->dma_type = MRAID_DMA_NONE; 3690 scb->dma_direction = PCI_DMA_NONE; 3691 3692 ccb = (mbox_ccb_t *)scb->ccb; 3693 mbox64 = (mbox64_t *)(unsigned long)kioc->cmdbuf; 3694 raw_mbox = (uint8_t *)&mbox64->mbox32; 3695 3696 memcpy(ccb->mbox64, mbox64, sizeof(mbox64_t)); 3697 3698 scb->gp = (unsigned long)kioc; 3699 3700 /* 3701 * If it is a logdrv random delete operation, we have to wait till 3702 * there are no outstanding cmds at the fw and then issue it directly 3703 */ 3704 if (raw_mbox[0] == FC_DEL_LOGDRV && raw_mbox[2] == OP_DEL_LOGDRV) { 3705 3706 if (wait_till_fw_empty(adapter)) { 3707 con_log(CL_ANN, (KERN_NOTICE 3708 "megaraid mbox: LD delete, timed out\n")); 3709 3710 kioc->status = -ETIME; 3711 3712 scb->status = -1; 3713 3714 megaraid_mbox_mm_done(adapter, scb); 3715 3716 return (-ETIME); 3717 } 3718 3719 INIT_LIST_HEAD(&scb->list); 3720 3721 scb->state = SCB_ISSUED; 3722 if (mbox_post_cmd(adapter, scb) != 0) { 3723 3724 con_log(CL_ANN, (KERN_NOTICE 3725 "megaraid mbox: LD delete, mailbox busy\n")); 3726 3727 kioc->status = -EBUSY; 3728 3729 scb->status = -1; 3730 3731 megaraid_mbox_mm_done(adapter, scb); 3732 3733 return (-EBUSY); 3734 } 3735 3736 return 0; 3737 } 3738 3739 // put the command on the pending list and execute 3740 megaraid_mbox_runpendq(adapter, scb); 3741 3742 return 0; 3743 } 3744 3745 3746 static int 3747 wait_till_fw_empty(adapter_t *adapter) 3748 { 3749 unsigned long flags = 0; 3750 int i; 3751 3752 3753 /* 3754 * Set the quiescent flag to stop issuing cmds to FW. 3755 */ 3756 spin_lock_irqsave(&adapter->lock, flags); 3757 adapter->quiescent++; 3758 spin_unlock_irqrestore(&adapter->lock, flags); 3759 3760 /* 3761 * Wait till there are no more cmds outstanding at FW. Try for at most 3762 * 60 seconds 3763 */ 3764 for (i = 0; i < 60 && adapter->outstanding_cmds; i++) { 3765 con_log(CL_DLEVEL1, (KERN_INFO 3766 "megaraid: FW has %d pending commands\n", 3767 adapter->outstanding_cmds)); 3768 3769 msleep(1000); 3770 } 3771 3772 return adapter->outstanding_cmds; 3773 } 3774 3775 3776 /** 3777 * megaraid_mbox_mm_done - callback for CMM commands 3778 * @adapter : HBA soft state 3779 * @scb : completed command 3780 * 3781 * Callback routine for internal commands originated from the management 3782 * module. 3783 */ 3784 static void 3785 megaraid_mbox_mm_done(adapter_t *adapter, scb_t *scb) 3786 { 3787 uioc_t *kioc; 3788 mbox64_t *mbox64; 3789 uint8_t *raw_mbox; 3790 unsigned long flags; 3791 3792 kioc = (uioc_t *)scb->gp; 3793 mbox64 = (mbox64_t *)(unsigned long)kioc->cmdbuf; 3794 mbox64->mbox32.status = scb->status; 3795 raw_mbox = (uint8_t *)&mbox64->mbox32; 3796 3797 3798 // put scb in the free pool 3799 scb->state = SCB_FREE; 3800 scb->scp = NULL; 3801 3802 spin_lock_irqsave(USER_FREE_LIST_LOCK(adapter), flags); 3803 3804 list_add(&scb->list, &adapter->uscb_pool); 3805 3806 spin_unlock_irqrestore(USER_FREE_LIST_LOCK(adapter), flags); 3807 3808 // if a delete logical drive operation succeeded, restart the 3809 // controller 3810 if (raw_mbox[0] == FC_DEL_LOGDRV && raw_mbox[2] == OP_DEL_LOGDRV) { 3811 3812 adapter->quiescent--; 3813 3814 megaraid_mbox_runpendq(adapter, NULL); 3815 } 3816 3817 kioc->done(kioc); 3818 3819 return; 3820 } 3821 3822 3823 /** 3824 * gather_hbainfo - HBA characteristics for the applications 3825 * @adapter : HBA soft state 3826 * @hinfo : pointer to the caller's host info strucuture 3827 */ 3828 static int 3829 gather_hbainfo(adapter_t *adapter, mraid_hba_info_t *hinfo) 3830 { 3831 uint8_t dmajor; 3832 3833 dmajor = megaraid_mbox_version[0]; 3834 3835 hinfo->pci_vendor_id = adapter->pdev->vendor; 3836 hinfo->pci_device_id = adapter->pdev->device; 3837 hinfo->subsys_vendor_id = adapter->pdev->subsystem_vendor; 3838 hinfo->subsys_device_id = adapter->pdev->subsystem_device; 3839 3840 hinfo->pci_bus = adapter->pdev->bus->number; 3841 hinfo->pci_dev_fn = adapter->pdev->devfn; 3842 hinfo->pci_slot = PCI_SLOT(adapter->pdev->devfn); 3843 hinfo->irq = adapter->host->irq; 3844 hinfo->baseport = ADAP2RAIDDEV(adapter)->baseport; 3845 3846 hinfo->unique_id = (hinfo->pci_bus << 8) | adapter->pdev->devfn; 3847 hinfo->host_no = adapter->host->host_no; 3848 3849 return 0; 3850 } 3851 3852 /* 3853 * END: Interface for the common management module 3854 */ 3855 3856 3857 3858 /** 3859 * megaraid_sysfs_alloc_resources - allocate sysfs related resources 3860 * @adapter : controller's soft state 3861 * 3862 * Allocate packets required to issue FW calls whenever the sysfs attributes 3863 * are read. These attributes would require up-to-date information from the 3864 * FW. Also set up resources for mutual exclusion to share these resources and 3865 * the wait queue. 3866 * 3867 * Return 0 on success. 3868 * Return -ERROR_CODE on failure. 3869 */ 3870 static int 3871 megaraid_sysfs_alloc_resources(adapter_t *adapter) 3872 { 3873 mraid_device_t *raid_dev = ADAP2RAIDDEV(adapter); 3874 int rval = 0; 3875 3876 raid_dev->sysfs_uioc = kmalloc(sizeof(uioc_t), GFP_KERNEL); 3877 3878 raid_dev->sysfs_mbox64 = kmalloc(sizeof(mbox64_t), GFP_KERNEL); 3879 3880 raid_dev->sysfs_buffer = pci_alloc_consistent(adapter->pdev, 3881 PAGE_SIZE, &raid_dev->sysfs_buffer_dma); 3882 3883 if (!raid_dev->sysfs_uioc || !raid_dev->sysfs_mbox64 || 3884 !raid_dev->sysfs_buffer) { 3885 3886 con_log(CL_ANN, (KERN_WARNING 3887 "megaraid: out of memory, %s %d\n", __func__, 3888 __LINE__)); 3889 3890 rval = -ENOMEM; 3891 3892 megaraid_sysfs_free_resources(adapter); 3893 } 3894 3895 mutex_init(&raid_dev->sysfs_mtx); 3896 3897 init_waitqueue_head(&raid_dev->sysfs_wait_q); 3898 3899 return rval; 3900 } 3901 3902 3903 /** 3904 * megaraid_sysfs_free_resources - free sysfs related resources 3905 * @adapter : controller's soft state 3906 * 3907 * Free packets allocated for sysfs FW commands 3908 */ 3909 static void 3910 megaraid_sysfs_free_resources(adapter_t *adapter) 3911 { 3912 mraid_device_t *raid_dev = ADAP2RAIDDEV(adapter); 3913 3914 kfree(raid_dev->sysfs_uioc); 3915 kfree(raid_dev->sysfs_mbox64); 3916 3917 if (raid_dev->sysfs_buffer) { 3918 pci_free_consistent(adapter->pdev, PAGE_SIZE, 3919 raid_dev->sysfs_buffer, raid_dev->sysfs_buffer_dma); 3920 } 3921 } 3922 3923 3924 /** 3925 * megaraid_sysfs_get_ldmap_done - callback for get ldmap 3926 * @uioc : completed packet 3927 * 3928 * Callback routine called in the ISR/tasklet context for get ldmap call 3929 */ 3930 static void 3931 megaraid_sysfs_get_ldmap_done(uioc_t *uioc) 3932 { 3933 adapter_t *adapter = (adapter_t *)uioc->buf_vaddr; 3934 mraid_device_t *raid_dev = ADAP2RAIDDEV(adapter); 3935 3936 uioc->status = 0; 3937 3938 wake_up(&raid_dev->sysfs_wait_q); 3939 } 3940 3941 3942 /** 3943 * megaraid_sysfs_get_ldmap_timeout - timeout handling for get ldmap 3944 * @data : timed out packet 3945 * 3946 * Timeout routine to recover and return to application, in case the adapter 3947 * has stopped responding. A timeout of 60 seconds for this command seems like 3948 * a good value. 3949 */ 3950 static void 3951 megaraid_sysfs_get_ldmap_timeout(unsigned long data) 3952 { 3953 uioc_t *uioc = (uioc_t *)data; 3954 adapter_t *adapter = (adapter_t *)uioc->buf_vaddr; 3955 mraid_device_t *raid_dev = ADAP2RAIDDEV(adapter); 3956 3957 uioc->status = -ETIME; 3958 3959 wake_up(&raid_dev->sysfs_wait_q); 3960 } 3961 3962 3963 /** 3964 * megaraid_sysfs_get_ldmap - get update logical drive map 3965 * @adapter : controller's soft state 3966 * 3967 * This routine will be called whenever user reads the logical drive 3968 * attributes, go get the current logical drive mapping table from the 3969 * firmware. We use the management API's to issue commands to the controller. 3970 * 3971 * NOTE: The commands issuance functionality is not generalized and 3972 * implemented in context of "get ld map" command only. If required, the 3973 * command issuance logical can be trivially pulled out and implemented as a 3974 * standalone libary. For now, this should suffice since there is no other 3975 * user of this interface. 3976 * 3977 * Return 0 on success. 3978 * Return -1 on failure. 3979 */ 3980 static int 3981 megaraid_sysfs_get_ldmap(adapter_t *adapter) 3982 { 3983 mraid_device_t *raid_dev = ADAP2RAIDDEV(adapter); 3984 uioc_t *uioc; 3985 mbox64_t *mbox64; 3986 mbox_t *mbox; 3987 char *raw_mbox; 3988 struct timer_list sysfs_timer; 3989 struct timer_list *timerp; 3990 caddr_t ldmap; 3991 int rval = 0; 3992 3993 /* 3994 * Allow only one read at a time to go through the sysfs attributes 3995 */ 3996 mutex_lock(&raid_dev->sysfs_mtx); 3997 3998 uioc = raid_dev->sysfs_uioc; 3999 mbox64 = raid_dev->sysfs_mbox64; 4000 ldmap = raid_dev->sysfs_buffer; 4001 4002 memset(uioc, 0, sizeof(uioc_t)); 4003 memset(mbox64, 0, sizeof(mbox64_t)); 4004 memset(ldmap, 0, sizeof(raid_dev->curr_ldmap)); 4005 4006 mbox = &mbox64->mbox32; 4007 raw_mbox = (char *)mbox; 4008 uioc->cmdbuf = (uint64_t)(unsigned long)mbox64; 4009 uioc->buf_vaddr = (caddr_t)adapter; 4010 uioc->status = -ENODATA; 4011 uioc->done = megaraid_sysfs_get_ldmap_done; 4012 4013 /* 4014 * Prepare the mailbox packet to get the current logical drive mapping 4015 * table 4016 */ 4017 mbox->xferaddr = (uint32_t)raid_dev->sysfs_buffer_dma; 4018 4019 raw_mbox[0] = FC_DEL_LOGDRV; 4020 raw_mbox[2] = OP_GET_LDID_MAP; 4021 4022 /* 4023 * Setup a timer to recover from a non-responding controller 4024 */ 4025 timerp = &sysfs_timer; 4026 init_timer(timerp); 4027 4028 timerp->function = megaraid_sysfs_get_ldmap_timeout; 4029 timerp->data = (unsigned long)uioc; 4030 timerp->expires = jiffies + 60 * HZ; 4031 4032 add_timer(timerp); 4033 4034 /* 4035 * Send the command to the firmware 4036 */ 4037 rval = megaraid_mbox_mm_command(adapter, uioc); 4038 4039 if (rval == 0) { // command successfully issued 4040 wait_event(raid_dev->sysfs_wait_q, (uioc->status != -ENODATA)); 4041 4042 /* 4043 * Check if the command timed out 4044 */ 4045 if (uioc->status == -ETIME) { 4046 con_log(CL_ANN, (KERN_NOTICE 4047 "megaraid: sysfs get ld map timed out\n")); 4048 4049 rval = -ETIME; 4050 } 4051 else { 4052 rval = mbox->status; 4053 } 4054 4055 if (rval == 0) { 4056 memcpy(raid_dev->curr_ldmap, ldmap, 4057 sizeof(raid_dev->curr_ldmap)); 4058 } 4059 else { 4060 con_log(CL_ANN, (KERN_NOTICE 4061 "megaraid: get ld map failed with %x\n", rval)); 4062 } 4063 } 4064 else { 4065 con_log(CL_ANN, (KERN_NOTICE 4066 "megaraid: could not issue ldmap command:%x\n", rval)); 4067 } 4068 4069 4070 del_timer_sync(timerp); 4071 4072 mutex_unlock(&raid_dev->sysfs_mtx); 4073 4074 return rval; 4075 } 4076 4077 4078 /** 4079 * megaraid_sysfs_show_app_hndl - display application handle for this adapter 4080 * @cdev : class device object representation for the host 4081 * @buf : buffer to send data to 4082 * 4083 * Display the handle used by the applications while executing management 4084 * tasks on the adapter. We invoke a management module API to get the adapter 4085 * handle, since we do not interface with applications directly. 4086 */ 4087 static ssize_t 4088 megaraid_sysfs_show_app_hndl(struct device *dev, struct device_attribute *attr, 4089 char *buf) 4090 { 4091 struct Scsi_Host *shost = class_to_shost(dev); 4092 adapter_t *adapter = (adapter_t *)SCSIHOST2ADAP(shost); 4093 uint32_t app_hndl; 4094 4095 app_hndl = mraid_mm_adapter_app_handle(adapter->unique_id); 4096 4097 return snprintf(buf, 8, "%u\n", app_hndl); 4098 } 4099 4100 4101 /** 4102 * megaraid_sysfs_show_ldnum - display the logical drive number for this device 4103 * @dev : device object representation for the scsi device 4104 * @attr : device attribute to show 4105 * @buf : buffer to send data to 4106 * 4107 * Display the logical drive number for the device in question, if it a valid 4108 * logical drive. For physical devices, "-1" is returned. 4109 * 4110 * The logical drive number is displayed in following format: 4111 * 4112 * <SCSI ID> <LD NUM> <LD STICKY ID> <APP ADAPTER HANDLE> 4113 * 4114 * <int> <int> <int> <int> 4115 */ 4116 static ssize_t 4117 megaraid_sysfs_show_ldnum(struct device *dev, struct device_attribute *attr, char *buf) 4118 { 4119 struct scsi_device *sdev = to_scsi_device(dev); 4120 adapter_t *adapter = (adapter_t *)SCSIHOST2ADAP(sdev->host); 4121 mraid_device_t *raid_dev = ADAP2RAIDDEV(adapter); 4122 int scsi_id = -1; 4123 int logical_drv = -1; 4124 int ldid_map = -1; 4125 uint32_t app_hndl = 0; 4126 int mapped_sdev_id; 4127 int rval; 4128 int i; 4129 4130 if (raid_dev->random_del_supported && 4131 MRAID_IS_LOGICAL_SDEV(adapter, sdev)) { 4132 4133 rval = megaraid_sysfs_get_ldmap(adapter); 4134 if (rval == 0) { 4135 4136 for (i = 0; i < MAX_LOGICAL_DRIVES_40LD; i++) { 4137 4138 mapped_sdev_id = sdev->id; 4139 4140 if (sdev->id > adapter->init_id) { 4141 mapped_sdev_id -= 1; 4142 } 4143 4144 if (raid_dev->curr_ldmap[i] == mapped_sdev_id) { 4145 4146 scsi_id = sdev->id; 4147 4148 logical_drv = i; 4149 4150 ldid_map = raid_dev->curr_ldmap[i]; 4151 4152 app_hndl = mraid_mm_adapter_app_handle( 4153 adapter->unique_id); 4154 4155 break; 4156 } 4157 } 4158 } 4159 else { 4160 con_log(CL_ANN, (KERN_NOTICE 4161 "megaraid: sysfs get ld map failed: %x\n", 4162 rval)); 4163 } 4164 } 4165 4166 return snprintf(buf, 36, "%d %d %d %d\n", scsi_id, logical_drv, 4167 ldid_map, app_hndl); 4168 } 4169 4170 4171 /* 4172 * END: Mailbox Low Level Driver 4173 */ 4174 module_init(megaraid_init); 4175 module_exit(megaraid_exit); 4176 4177 /* vim: set ts=8 sw=8 tw=78 ai si: */ 4178