1 /* 2 * 3 * Linux MegaRAID device driver 4 * 5 * Copyright (c) 2003-2004 LSI Logic Corporation. 6 * 7 * This program is free software; you can redistribute it and/or 8 * modify it under the terms of the GNU General Public License 9 * as published by the Free Software Foundation; either version 10 * 2 of the License, or (at your option) any later version. 11 * 12 * FILE : megaraid_mbox.c 13 * Version : v2.20.5.1 (Nov 16 2006) 14 * 15 * Authors: 16 * Atul Mukker <Atul.Mukker@lsi.com> 17 * Sreenivas Bagalkote <Sreenivas.Bagalkote@lsi.com> 18 * Manoj Jose <Manoj.Jose@lsi.com> 19 * Seokmann Ju 20 * 21 * List of supported controllers 22 * 23 * OEM Product Name VID DID SSVID SSID 24 * --- ------------ --- --- ---- ---- 25 * Dell PERC3/QC 101E 1960 1028 0471 26 * Dell PERC3/DC 101E 1960 1028 0493 27 * Dell PERC3/SC 101E 1960 1028 0475 28 * Dell PERC3/Di 1028 1960 1028 0123 29 * Dell PERC4/SC 1000 1960 1028 0520 30 * Dell PERC4/DC 1000 1960 1028 0518 31 * Dell PERC4/QC 1000 0407 1028 0531 32 * Dell PERC4/Di 1028 000F 1028 014A 33 * Dell PERC 4e/Si 1028 0013 1028 016c 34 * Dell PERC 4e/Di 1028 0013 1028 016d 35 * Dell PERC 4e/Di 1028 0013 1028 016e 36 * Dell PERC 4e/Di 1028 0013 1028 016f 37 * Dell PERC 4e/Di 1028 0013 1028 0170 38 * Dell PERC 4e/DC 1000 0408 1028 0002 39 * Dell PERC 4e/SC 1000 0408 1028 0001 40 * 41 * 42 * LSI MegaRAID SCSI 320-0 1000 1960 1000 A520 43 * LSI MegaRAID SCSI 320-1 1000 1960 1000 0520 44 * LSI MegaRAID SCSI 320-2 1000 1960 1000 0518 45 * LSI MegaRAID SCSI 320-0X 1000 0407 1000 0530 46 * LSI MegaRAID SCSI 320-2X 1000 0407 1000 0532 47 * LSI MegaRAID SCSI 320-4X 1000 0407 1000 0531 48 * LSI MegaRAID SCSI 320-1E 1000 0408 1000 0001 49 * LSI MegaRAID SCSI 320-2E 1000 0408 1000 0002 50 * LSI MegaRAID SATA 150-4 1000 1960 1000 4523 51 * LSI MegaRAID SATA 150-6 1000 1960 1000 0523 52 * LSI MegaRAID SATA 300-4X 1000 0409 1000 3004 53 * LSI MegaRAID SATA 300-8X 1000 0409 1000 3008 54 * 55 * INTEL RAID Controller SRCU42X 1000 0407 8086 0532 56 * INTEL RAID Controller SRCS16 1000 1960 8086 0523 57 * INTEL RAID Controller SRCU42E 1000 0408 8086 0002 58 * INTEL RAID Controller SRCZCRX 1000 0407 8086 0530 59 * INTEL RAID Controller SRCS28X 1000 0409 8086 3008 60 * INTEL RAID Controller SROMBU42E 1000 0408 8086 3431 61 * INTEL RAID Controller SROMBU42E 1000 0408 8086 3499 62 * INTEL RAID Controller SRCU51L 1000 1960 8086 0520 63 * 64 * FSC MegaRAID PCI Express ROMB 1000 0408 1734 1065 65 * 66 * ACER MegaRAID ROMB-2E 1000 0408 1025 004D 67 * 68 * NEC MegaRAID PCI Express ROMB 1000 0408 1033 8287 69 * 70 * For history of changes, see Documentation/ChangeLog.megaraid 71 */ 72 73 #include <linux/slab.h> 74 #include "megaraid_mbox.h" 75 76 static int megaraid_init(void); 77 static void megaraid_exit(void); 78 79 static int megaraid_probe_one(struct pci_dev*, const struct pci_device_id *); 80 static void megaraid_detach_one(struct pci_dev *); 81 static void megaraid_mbox_shutdown(struct pci_dev *); 82 83 static int megaraid_io_attach(adapter_t *); 84 static void megaraid_io_detach(adapter_t *); 85 86 static int megaraid_init_mbox(adapter_t *); 87 static void megaraid_fini_mbox(adapter_t *); 88 89 static int megaraid_alloc_cmd_packets(adapter_t *); 90 static void megaraid_free_cmd_packets(adapter_t *); 91 92 static int megaraid_mbox_setup_dma_pools(adapter_t *); 93 static void megaraid_mbox_teardown_dma_pools(adapter_t *); 94 95 static int megaraid_sysfs_alloc_resources(adapter_t *); 96 static void megaraid_sysfs_free_resources(adapter_t *); 97 98 static int megaraid_abort_handler(struct scsi_cmnd *); 99 static int megaraid_reset_handler(struct scsi_cmnd *); 100 101 static int mbox_post_sync_cmd(adapter_t *, uint8_t []); 102 static int mbox_post_sync_cmd_fast(adapter_t *, uint8_t []); 103 static int megaraid_busywait_mbox(mraid_device_t *); 104 static int megaraid_mbox_product_info(adapter_t *); 105 static int megaraid_mbox_extended_cdb(adapter_t *); 106 static int megaraid_mbox_support_ha(adapter_t *, uint16_t *); 107 static int megaraid_mbox_support_random_del(adapter_t *); 108 static int megaraid_mbox_get_max_sg(adapter_t *); 109 static void megaraid_mbox_enum_raid_scsi(adapter_t *); 110 static void megaraid_mbox_flush_cache(adapter_t *); 111 static int megaraid_mbox_fire_sync_cmd(adapter_t *); 112 113 static void megaraid_mbox_display_scb(adapter_t *, scb_t *); 114 static void megaraid_mbox_setup_device_map(adapter_t *); 115 116 static int megaraid_queue_command(struct Scsi_Host *, 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_lck(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 static DEF_SCSI_QCMD(megaraid_queue_command) 1516 1517 /** 1518 * megaraid_mbox_build_cmd - transform the mid-layer scsi commands 1519 * @adapter : controller's soft state 1520 * @scp : mid-layer scsi command pointer 1521 * @busy : set if request could not be completed because of lack of 1522 * resources 1523 * 1524 * Transform the mid-layer scsi command to megaraid firmware lingua. 1525 * Convert the command issued by mid-layer to format understood by megaraid 1526 * firmware. We also complete certain commands without sending them to firmware. 1527 */ 1528 static scb_t * 1529 megaraid_mbox_build_cmd(adapter_t *adapter, struct scsi_cmnd *scp, int *busy) 1530 { 1531 mraid_device_t *rdev = ADAP2RAIDDEV(adapter); 1532 int channel; 1533 int target; 1534 int islogical; 1535 mbox_ccb_t *ccb; 1536 mraid_passthru_t *pthru; 1537 mbox64_t *mbox64; 1538 mbox_t *mbox; 1539 scb_t *scb; 1540 char skip[] = "skipping"; 1541 char scan[] = "scanning"; 1542 char *ss; 1543 1544 1545 /* 1546 * Get the appropriate device map for the device this command is 1547 * intended for 1548 */ 1549 MRAID_GET_DEVICE_MAP(adapter, scp, channel, target, islogical); 1550 1551 /* 1552 * Logical drive commands 1553 */ 1554 if (islogical) { 1555 switch (scp->cmnd[0]) { 1556 case TEST_UNIT_READY: 1557 /* 1558 * Do we support clustering and is the support enabled 1559 * If no, return success always 1560 */ 1561 if (!adapter->ha) { 1562 scp->result = (DID_OK << 16); 1563 return NULL; 1564 } 1565 1566 if (!(scb = megaraid_alloc_scb(adapter, scp))) { 1567 scp->result = (DID_ERROR << 16); 1568 *busy = 1; 1569 return NULL; 1570 } 1571 1572 scb->dma_direction = scp->sc_data_direction; 1573 scb->dev_channel = 0xFF; 1574 scb->dev_target = target; 1575 ccb = (mbox_ccb_t *)scb->ccb; 1576 1577 /* 1578 * The command id will be provided by the command 1579 * issuance routine 1580 */ 1581 ccb->raw_mbox[0] = CLUSTER_CMD; 1582 ccb->raw_mbox[2] = RESERVATION_STATUS; 1583 ccb->raw_mbox[3] = target; 1584 1585 return scb; 1586 1587 case MODE_SENSE: 1588 { 1589 struct scatterlist *sgl; 1590 caddr_t vaddr; 1591 1592 sgl = scsi_sglist(scp); 1593 if (sg_page(sgl)) { 1594 vaddr = (caddr_t) sg_virt(&sgl[0]); 1595 1596 memset(vaddr, 0, scp->cmnd[4]); 1597 } 1598 else { 1599 con_log(CL_ANN, (KERN_WARNING 1600 "megaraid mailbox: invalid sg:%d\n", 1601 __LINE__)); 1602 } 1603 } 1604 scp->result = (DID_OK << 16); 1605 return NULL; 1606 1607 case INQUIRY: 1608 /* 1609 * Display the channel scan for logical drives 1610 * Do not display scan for a channel if already done. 1611 */ 1612 if (!(rdev->last_disp & (1L << SCP2CHANNEL(scp)))) { 1613 1614 con_log(CL_ANN, (KERN_INFO 1615 "scsi[%d]: scanning scsi channel %d", 1616 adapter->host->host_no, 1617 SCP2CHANNEL(scp))); 1618 1619 con_log(CL_ANN, ( 1620 " [virtual] for logical drives\n")); 1621 1622 rdev->last_disp |= (1L << SCP2CHANNEL(scp)); 1623 } 1624 1625 if (scp->cmnd[1] & MEGA_SCSI_INQ_EVPD) { 1626 scp->sense_buffer[0] = 0x70; 1627 scp->sense_buffer[2] = ILLEGAL_REQUEST; 1628 scp->sense_buffer[12] = MEGA_INVALID_FIELD_IN_CDB; 1629 scp->result = CHECK_CONDITION << 1; 1630 return NULL; 1631 } 1632 1633 /* Fall through */ 1634 1635 case READ_CAPACITY: 1636 /* 1637 * Do not allow LUN > 0 for logical drives and 1638 * requests for more than 40 logical drives 1639 */ 1640 if (SCP2LUN(scp)) { 1641 scp->result = (DID_BAD_TARGET << 16); 1642 return NULL; 1643 } 1644 if ((target % 0x80) >= MAX_LOGICAL_DRIVES_40LD) { 1645 scp->result = (DID_BAD_TARGET << 16); 1646 return NULL; 1647 } 1648 1649 1650 /* Allocate a SCB and initialize passthru */ 1651 if (!(scb = megaraid_alloc_scb(adapter, scp))) { 1652 scp->result = (DID_ERROR << 16); 1653 *busy = 1; 1654 return NULL; 1655 } 1656 1657 ccb = (mbox_ccb_t *)scb->ccb; 1658 scb->dev_channel = 0xFF; 1659 scb->dev_target = target; 1660 pthru = ccb->pthru; 1661 mbox = ccb->mbox; 1662 mbox64 = ccb->mbox64; 1663 1664 pthru->timeout = 0; 1665 pthru->ars = 1; 1666 pthru->reqsenselen = 14; 1667 pthru->islogical = 1; 1668 pthru->logdrv = target; 1669 pthru->cdblen = scp->cmd_len; 1670 memcpy(pthru->cdb, scp->cmnd, scp->cmd_len); 1671 1672 mbox->cmd = MBOXCMD_PASSTHRU64; 1673 scb->dma_direction = scp->sc_data_direction; 1674 1675 pthru->dataxferlen = scsi_bufflen(scp); 1676 pthru->dataxferaddr = ccb->sgl_dma_h; 1677 pthru->numsge = megaraid_mbox_mksgl(adapter, 1678 scb); 1679 1680 mbox->xferaddr = 0xFFFFFFFF; 1681 mbox64->xferaddr_lo = (uint32_t )ccb->pthru_dma_h; 1682 mbox64->xferaddr_hi = 0; 1683 1684 return scb; 1685 1686 case READ_6: 1687 case WRITE_6: 1688 case READ_10: 1689 case WRITE_10: 1690 case READ_12: 1691 case WRITE_12: 1692 1693 /* 1694 * Allocate a SCB and initialize mailbox 1695 */ 1696 if (!(scb = megaraid_alloc_scb(adapter, scp))) { 1697 scp->result = (DID_ERROR << 16); 1698 *busy = 1; 1699 return NULL; 1700 } 1701 ccb = (mbox_ccb_t *)scb->ccb; 1702 scb->dev_channel = 0xFF; 1703 scb->dev_target = target; 1704 mbox = ccb->mbox; 1705 mbox64 = ccb->mbox64; 1706 mbox->logdrv = target; 1707 1708 /* 1709 * A little HACK: 2nd bit is zero for all scsi read 1710 * commands and is set for all scsi write commands 1711 */ 1712 mbox->cmd = (scp->cmnd[0] & 0x02) ? MBOXCMD_LWRITE64: 1713 MBOXCMD_LREAD64 ; 1714 1715 /* 1716 * 6-byte READ(0x08) or WRITE(0x0A) cdb 1717 */ 1718 if (scp->cmd_len == 6) { 1719 mbox->numsectors = (uint32_t)scp->cmnd[4]; 1720 mbox->lba = 1721 ((uint32_t)scp->cmnd[1] << 16) | 1722 ((uint32_t)scp->cmnd[2] << 8) | 1723 (uint32_t)scp->cmnd[3]; 1724 1725 mbox->lba &= 0x1FFFFF; 1726 } 1727 1728 /* 1729 * 10-byte READ(0x28) or WRITE(0x2A) cdb 1730 */ 1731 else if (scp->cmd_len == 10) { 1732 mbox->numsectors = 1733 (uint32_t)scp->cmnd[8] | 1734 ((uint32_t)scp->cmnd[7] << 8); 1735 mbox->lba = 1736 ((uint32_t)scp->cmnd[2] << 24) | 1737 ((uint32_t)scp->cmnd[3] << 16) | 1738 ((uint32_t)scp->cmnd[4] << 8) | 1739 (uint32_t)scp->cmnd[5]; 1740 } 1741 1742 /* 1743 * 12-byte READ(0xA8) or WRITE(0xAA) cdb 1744 */ 1745 else if (scp->cmd_len == 12) { 1746 mbox->lba = 1747 ((uint32_t)scp->cmnd[2] << 24) | 1748 ((uint32_t)scp->cmnd[3] << 16) | 1749 ((uint32_t)scp->cmnd[4] << 8) | 1750 (uint32_t)scp->cmnd[5]; 1751 1752 mbox->numsectors = 1753 ((uint32_t)scp->cmnd[6] << 24) | 1754 ((uint32_t)scp->cmnd[7] << 16) | 1755 ((uint32_t)scp->cmnd[8] << 8) | 1756 (uint32_t)scp->cmnd[9]; 1757 } 1758 else { 1759 con_log(CL_ANN, (KERN_WARNING 1760 "megaraid: unsupported CDB length\n")); 1761 1762 megaraid_dealloc_scb(adapter, scb); 1763 1764 scp->result = (DID_ERROR << 16); 1765 return NULL; 1766 } 1767 1768 scb->dma_direction = scp->sc_data_direction; 1769 1770 // Calculate Scatter-Gather info 1771 mbox64->xferaddr_lo = (uint32_t )ccb->sgl_dma_h; 1772 mbox->numsge = megaraid_mbox_mksgl(adapter, 1773 scb); 1774 mbox->xferaddr = 0xFFFFFFFF; 1775 mbox64->xferaddr_hi = 0; 1776 1777 return scb; 1778 1779 case RESERVE: 1780 case RELEASE: 1781 /* 1782 * Do we support clustering and is the support enabled 1783 */ 1784 if (!adapter->ha) { 1785 scp->result = (DID_BAD_TARGET << 16); 1786 return NULL; 1787 } 1788 1789 /* 1790 * Allocate a SCB and initialize mailbox 1791 */ 1792 if (!(scb = megaraid_alloc_scb(adapter, scp))) { 1793 scp->result = (DID_ERROR << 16); 1794 *busy = 1; 1795 return NULL; 1796 } 1797 1798 ccb = (mbox_ccb_t *)scb->ccb; 1799 scb->dev_channel = 0xFF; 1800 scb->dev_target = target; 1801 ccb->raw_mbox[0] = CLUSTER_CMD; 1802 ccb->raw_mbox[2] = (scp->cmnd[0] == RESERVE) ? 1803 RESERVE_LD : RELEASE_LD; 1804 1805 ccb->raw_mbox[3] = target; 1806 scb->dma_direction = scp->sc_data_direction; 1807 1808 return scb; 1809 1810 default: 1811 scp->result = (DID_BAD_TARGET << 16); 1812 return NULL; 1813 } 1814 } 1815 else { // Passthru device commands 1816 1817 // Do not allow access to target id > 15 or LUN > 7 1818 if (target > 15 || SCP2LUN(scp) > 7) { 1819 scp->result = (DID_BAD_TARGET << 16); 1820 return NULL; 1821 } 1822 1823 // if fast load option was set and scan for last device is 1824 // over, reset the fast_load flag so that during a possible 1825 // next scan, devices can be made available 1826 if (rdev->fast_load && (target == 15) && 1827 (SCP2CHANNEL(scp) == adapter->max_channel -1)) { 1828 1829 con_log(CL_ANN, (KERN_INFO 1830 "megaraid[%d]: physical device scan re-enabled\n", 1831 adapter->host->host_no)); 1832 rdev->fast_load = 0; 1833 } 1834 1835 /* 1836 * Display the channel scan for physical devices 1837 */ 1838 if (!(rdev->last_disp & (1L << SCP2CHANNEL(scp)))) { 1839 1840 ss = rdev->fast_load ? skip : scan; 1841 1842 con_log(CL_ANN, (KERN_INFO 1843 "scsi[%d]: %s scsi channel %d [Phy %d]", 1844 adapter->host->host_no, ss, SCP2CHANNEL(scp), 1845 channel)); 1846 1847 con_log(CL_ANN, ( 1848 " for non-raid devices\n")); 1849 1850 rdev->last_disp |= (1L << SCP2CHANNEL(scp)); 1851 } 1852 1853 // disable channel sweep if fast load option given 1854 if (rdev->fast_load) { 1855 scp->result = (DID_BAD_TARGET << 16); 1856 return NULL; 1857 } 1858 1859 // Allocate a SCB and initialize passthru 1860 if (!(scb = megaraid_alloc_scb(adapter, scp))) { 1861 scp->result = (DID_ERROR << 16); 1862 *busy = 1; 1863 return NULL; 1864 } 1865 1866 ccb = (mbox_ccb_t *)scb->ccb; 1867 scb->dev_channel = channel; 1868 scb->dev_target = target; 1869 scb->dma_direction = scp->sc_data_direction; 1870 mbox = ccb->mbox; 1871 mbox64 = ccb->mbox64; 1872 1873 // Does this firmware support extended CDBs 1874 if (adapter->max_cdb_sz == 16) { 1875 mbox->cmd = MBOXCMD_EXTPTHRU; 1876 1877 megaraid_mbox_prepare_epthru(adapter, scb, scp); 1878 1879 mbox64->xferaddr_lo = (uint32_t)ccb->epthru_dma_h; 1880 mbox64->xferaddr_hi = 0; 1881 mbox->xferaddr = 0xFFFFFFFF; 1882 } 1883 else { 1884 mbox->cmd = MBOXCMD_PASSTHRU64; 1885 1886 megaraid_mbox_prepare_pthru(adapter, scb, scp); 1887 1888 mbox64->xferaddr_lo = (uint32_t)ccb->pthru_dma_h; 1889 mbox64->xferaddr_hi = 0; 1890 mbox->xferaddr = 0xFFFFFFFF; 1891 } 1892 return scb; 1893 } 1894 1895 // NOT REACHED 1896 } 1897 1898 1899 /** 1900 * megaraid_mbox_runpendq - execute commands queued in the pending queue 1901 * @adapter : controller's soft state 1902 * @scb_q : SCB to be queued in the pending list 1903 * 1904 * Scan the pending list for commands which are not yet issued and try to 1905 * post to the controller. The SCB can be a null pointer, which would indicate 1906 * no SCB to be queue, just try to execute the ones in the pending list. 1907 * 1908 * NOTE: We do not actually traverse the pending list. The SCBs are plucked 1909 * out from the head of the pending list. If it is successfully issued, the 1910 * next SCB is at the head now. 1911 */ 1912 static void 1913 megaraid_mbox_runpendq(adapter_t *adapter, scb_t *scb_q) 1914 { 1915 scb_t *scb; 1916 unsigned long flags; 1917 1918 spin_lock_irqsave(PENDING_LIST_LOCK(adapter), flags); 1919 1920 if (scb_q) { 1921 scb_q->state = SCB_PENDQ; 1922 list_add_tail(&scb_q->list, &adapter->pend_list); 1923 } 1924 1925 // if the adapter in not in quiescent mode, post the commands to FW 1926 if (adapter->quiescent) { 1927 spin_unlock_irqrestore(PENDING_LIST_LOCK(adapter), flags); 1928 return; 1929 } 1930 1931 while (!list_empty(&adapter->pend_list)) { 1932 1933 assert_spin_locked(PENDING_LIST_LOCK(adapter)); 1934 1935 scb = list_entry(adapter->pend_list.next, scb_t, list); 1936 1937 // remove the scb from the pending list and try to 1938 // issue. If we are unable to issue it, put back in 1939 // the pending list and return 1940 1941 list_del_init(&scb->list); 1942 1943 spin_unlock_irqrestore(PENDING_LIST_LOCK(adapter), flags); 1944 1945 // if mailbox was busy, return SCB back to pending 1946 // list. Make sure to add at the head, since that's 1947 // where it would have been removed from 1948 1949 scb->state = SCB_ISSUED; 1950 1951 if (mbox_post_cmd(adapter, scb) != 0) { 1952 1953 spin_lock_irqsave(PENDING_LIST_LOCK(adapter), flags); 1954 1955 scb->state = SCB_PENDQ; 1956 1957 list_add(&scb->list, &adapter->pend_list); 1958 1959 spin_unlock_irqrestore(PENDING_LIST_LOCK(adapter), 1960 flags); 1961 1962 return; 1963 } 1964 1965 spin_lock_irqsave(PENDING_LIST_LOCK(adapter), flags); 1966 } 1967 1968 spin_unlock_irqrestore(PENDING_LIST_LOCK(adapter), flags); 1969 1970 1971 return; 1972 } 1973 1974 1975 /** 1976 * megaraid_mbox_prepare_pthru - prepare a command for physical devices 1977 * @adapter : pointer to controller's soft state 1978 * @scb : scsi control block 1979 * @scp : scsi command from the mid-layer 1980 * 1981 * Prepare a command for the scsi physical devices. 1982 */ 1983 static void 1984 megaraid_mbox_prepare_pthru(adapter_t *adapter, scb_t *scb, 1985 struct scsi_cmnd *scp) 1986 { 1987 mbox_ccb_t *ccb; 1988 mraid_passthru_t *pthru; 1989 uint8_t channel; 1990 uint8_t target; 1991 1992 ccb = (mbox_ccb_t *)scb->ccb; 1993 pthru = ccb->pthru; 1994 channel = scb->dev_channel; 1995 target = scb->dev_target; 1996 1997 // 0=6sec, 1=60sec, 2=10min, 3=3hrs, 4=NO timeout 1998 pthru->timeout = 4; 1999 pthru->ars = 1; 2000 pthru->islogical = 0; 2001 pthru->channel = 0; 2002 pthru->target = (channel << 4) | target; 2003 pthru->logdrv = SCP2LUN(scp); 2004 pthru->reqsenselen = 14; 2005 pthru->cdblen = scp->cmd_len; 2006 2007 memcpy(pthru->cdb, scp->cmnd, scp->cmd_len); 2008 2009 if (scsi_bufflen(scp)) { 2010 pthru->dataxferlen = scsi_bufflen(scp); 2011 pthru->dataxferaddr = ccb->sgl_dma_h; 2012 pthru->numsge = megaraid_mbox_mksgl(adapter, scb); 2013 } 2014 else { 2015 pthru->dataxferaddr = 0; 2016 pthru->dataxferlen = 0; 2017 pthru->numsge = 0; 2018 } 2019 return; 2020 } 2021 2022 2023 /** 2024 * megaraid_mbox_prepare_epthru - prepare a command for physical devices 2025 * @adapter : pointer to controller's soft state 2026 * @scb : scsi control block 2027 * @scp : scsi command from the mid-layer 2028 * 2029 * Prepare a command for the scsi physical devices. This rountine prepares 2030 * commands for devices which can take extended CDBs (>10 bytes). 2031 */ 2032 static void 2033 megaraid_mbox_prepare_epthru(adapter_t *adapter, scb_t *scb, 2034 struct scsi_cmnd *scp) 2035 { 2036 mbox_ccb_t *ccb; 2037 mraid_epassthru_t *epthru; 2038 uint8_t channel; 2039 uint8_t target; 2040 2041 ccb = (mbox_ccb_t *)scb->ccb; 2042 epthru = ccb->epthru; 2043 channel = scb->dev_channel; 2044 target = scb->dev_target; 2045 2046 // 0=6sec, 1=60sec, 2=10min, 3=3hrs, 4=NO timeout 2047 epthru->timeout = 4; 2048 epthru->ars = 1; 2049 epthru->islogical = 0; 2050 epthru->channel = 0; 2051 epthru->target = (channel << 4) | target; 2052 epthru->logdrv = SCP2LUN(scp); 2053 epthru->reqsenselen = 14; 2054 epthru->cdblen = scp->cmd_len; 2055 2056 memcpy(epthru->cdb, scp->cmnd, scp->cmd_len); 2057 2058 if (scsi_bufflen(scp)) { 2059 epthru->dataxferlen = scsi_bufflen(scp); 2060 epthru->dataxferaddr = ccb->sgl_dma_h; 2061 epthru->numsge = megaraid_mbox_mksgl(adapter, scb); 2062 } 2063 else { 2064 epthru->dataxferaddr = 0; 2065 epthru->dataxferlen = 0; 2066 epthru->numsge = 0; 2067 } 2068 return; 2069 } 2070 2071 2072 /** 2073 * megaraid_ack_sequence - interrupt ack sequence for memory mapped HBAs 2074 * @adapter : controller's soft state 2075 * 2076 * Interrupt acknowledgement sequence for memory mapped HBAs. Find out the 2077 * completed command and put them on the completed list for later processing. 2078 * 2079 * Returns: 1 if the interrupt is valid, 0 otherwise 2080 */ 2081 static int 2082 megaraid_ack_sequence(adapter_t *adapter) 2083 { 2084 mraid_device_t *raid_dev = ADAP2RAIDDEV(adapter); 2085 mbox_t *mbox; 2086 scb_t *scb; 2087 uint8_t nstatus; 2088 uint8_t completed[MBOX_MAX_FIRMWARE_STATUS]; 2089 struct list_head clist; 2090 int handled; 2091 uint32_t dword; 2092 unsigned long flags; 2093 int i, j; 2094 2095 2096 mbox = raid_dev->mbox; 2097 2098 // move the SCBs from the firmware completed array to our local list 2099 INIT_LIST_HEAD(&clist); 2100 2101 // loop till F/W has more commands for us to complete 2102 handled = 0; 2103 spin_lock_irqsave(MAILBOX_LOCK(raid_dev), flags); 2104 do { 2105 /* 2106 * Check if a valid interrupt is pending. If found, force the 2107 * interrupt line low. 2108 */ 2109 dword = RDOUTDOOR(raid_dev); 2110 if (dword != 0x10001234) break; 2111 2112 handled = 1; 2113 2114 WROUTDOOR(raid_dev, 0x10001234); 2115 2116 nstatus = 0; 2117 // wait for valid numstatus to post 2118 for (i = 0; i < 0xFFFFF; i++) { 2119 if (mbox->numstatus != 0xFF) { 2120 nstatus = mbox->numstatus; 2121 break; 2122 } 2123 rmb(); 2124 } 2125 mbox->numstatus = 0xFF; 2126 2127 adapter->outstanding_cmds -= nstatus; 2128 2129 for (i = 0; i < nstatus; i++) { 2130 2131 // wait for valid command index to post 2132 for (j = 0; j < 0xFFFFF; j++) { 2133 if (mbox->completed[i] != 0xFF) break; 2134 rmb(); 2135 } 2136 completed[i] = mbox->completed[i]; 2137 mbox->completed[i] = 0xFF; 2138 2139 if (completed[i] == 0xFF) { 2140 con_log(CL_ANN, (KERN_CRIT 2141 "megaraid: command posting timed out\n")); 2142 2143 BUG(); 2144 continue; 2145 } 2146 2147 // Get SCB associated with this command id 2148 if (completed[i] >= MBOX_MAX_SCSI_CMDS) { 2149 // a cmm command 2150 scb = adapter->uscb_list + (completed[i] - 2151 MBOX_MAX_SCSI_CMDS); 2152 } 2153 else { 2154 // an os command 2155 scb = adapter->kscb_list + completed[i]; 2156 } 2157 2158 scb->status = mbox->status; 2159 list_add_tail(&scb->list, &clist); 2160 } 2161 2162 // Acknowledge interrupt 2163 WRINDOOR(raid_dev, 0x02); 2164 2165 } while(1); 2166 2167 spin_unlock_irqrestore(MAILBOX_LOCK(raid_dev), flags); 2168 2169 2170 // put the completed commands in the completed list. DPC would 2171 // complete these commands later 2172 spin_lock_irqsave(COMPLETED_LIST_LOCK(adapter), flags); 2173 2174 list_splice(&clist, &adapter->completed_list); 2175 2176 spin_unlock_irqrestore(COMPLETED_LIST_LOCK(adapter), flags); 2177 2178 2179 // schedule the DPC if there is some work for it 2180 if (handled) 2181 tasklet_schedule(&adapter->dpc_h); 2182 2183 return handled; 2184 } 2185 2186 2187 /** 2188 * megaraid_isr - isr for memory based mailbox based controllers 2189 * @irq : irq 2190 * @devp : pointer to our soft state 2191 * 2192 * Interrupt service routine for memory-mapped mailbox controllers. 2193 */ 2194 static irqreturn_t 2195 megaraid_isr(int irq, void *devp) 2196 { 2197 adapter_t *adapter = devp; 2198 int handled; 2199 2200 handled = megaraid_ack_sequence(adapter); 2201 2202 /* Loop through any pending requests */ 2203 if (!adapter->quiescent) { 2204 megaraid_mbox_runpendq(adapter, NULL); 2205 } 2206 2207 return IRQ_RETVAL(handled); 2208 } 2209 2210 2211 /** 2212 * megaraid_mbox_sync_scb - sync kernel buffers 2213 * @adapter : controller's soft state 2214 * @scb : pointer to the resource packet 2215 * 2216 * DMA sync if required. 2217 */ 2218 static void 2219 megaraid_mbox_sync_scb(adapter_t *adapter, scb_t *scb) 2220 { 2221 mbox_ccb_t *ccb; 2222 2223 ccb = (mbox_ccb_t *)scb->ccb; 2224 2225 if (scb->dma_direction == PCI_DMA_FROMDEVICE) 2226 pci_dma_sync_sg_for_cpu(adapter->pdev, 2227 scsi_sglist(scb->scp), 2228 scsi_sg_count(scb->scp), 2229 PCI_DMA_FROMDEVICE); 2230 2231 scsi_dma_unmap(scb->scp); 2232 return; 2233 } 2234 2235 2236 /** 2237 * megaraid_mbox_dpc - the tasklet to complete the commands from completed list 2238 * @devp : pointer to HBA soft state 2239 * 2240 * Pick up the commands from the completed list and send back to the owners. 2241 * This is a reentrant function and does not assume any locks are held while 2242 * it is being called. 2243 */ 2244 static void 2245 megaraid_mbox_dpc(unsigned long devp) 2246 { 2247 adapter_t *adapter = (adapter_t *)devp; 2248 mraid_device_t *raid_dev; 2249 struct list_head clist; 2250 struct scatterlist *sgl; 2251 scb_t *scb; 2252 scb_t *tmp; 2253 struct scsi_cmnd *scp; 2254 mraid_passthru_t *pthru; 2255 mraid_epassthru_t *epthru; 2256 mbox_ccb_t *ccb; 2257 int islogical; 2258 int pdev_index; 2259 int pdev_state; 2260 mbox_t *mbox; 2261 unsigned long flags; 2262 uint8_t c; 2263 int status; 2264 uioc_t *kioc; 2265 2266 2267 if (!adapter) return; 2268 2269 raid_dev = ADAP2RAIDDEV(adapter); 2270 2271 // move the SCBs from the completed list to our local list 2272 INIT_LIST_HEAD(&clist); 2273 2274 spin_lock_irqsave(COMPLETED_LIST_LOCK(adapter), flags); 2275 2276 list_splice_init(&adapter->completed_list, &clist); 2277 2278 spin_unlock_irqrestore(COMPLETED_LIST_LOCK(adapter), flags); 2279 2280 2281 list_for_each_entry_safe(scb, tmp, &clist, list) { 2282 2283 status = scb->status; 2284 scp = scb->scp; 2285 ccb = (mbox_ccb_t *)scb->ccb; 2286 pthru = ccb->pthru; 2287 epthru = ccb->epthru; 2288 mbox = ccb->mbox; 2289 2290 // Make sure f/w has completed a valid command 2291 if (scb->state != SCB_ISSUED) { 2292 con_log(CL_ANN, (KERN_CRIT 2293 "megaraid critical err: invalid command %d:%d:%p\n", 2294 scb->sno, scb->state, scp)); 2295 BUG(); 2296 continue; // Must never happen! 2297 } 2298 2299 // check for the management command and complete it right away 2300 if (scb->sno >= MBOX_MAX_SCSI_CMDS) { 2301 scb->state = SCB_FREE; 2302 scb->status = status; 2303 2304 // remove from local clist 2305 list_del_init(&scb->list); 2306 2307 kioc = (uioc_t *)scb->gp; 2308 kioc->status = 0; 2309 2310 megaraid_mbox_mm_done(adapter, scb); 2311 2312 continue; 2313 } 2314 2315 // Was an abort issued for this command earlier 2316 if (scb->state & SCB_ABORT) { 2317 con_log(CL_ANN, (KERN_NOTICE 2318 "megaraid: aborted cmd %lx[%x] completed\n", 2319 scp->serial_number, scb->sno)); 2320 } 2321 2322 /* 2323 * If the inquiry came of a disk drive which is not part of 2324 * any RAID array, expose it to the kernel. For this to be 2325 * enabled, user must set the "megaraid_expose_unconf_disks" 2326 * flag to 1 by specifying it on module parameter list. 2327 * This would enable data migration off drives from other 2328 * configurations. 2329 */ 2330 islogical = MRAID_IS_LOGICAL(adapter, scp); 2331 if (scp->cmnd[0] == INQUIRY && status == 0 && islogical == 0 2332 && IS_RAID_CH(raid_dev, scb->dev_channel)) { 2333 2334 sgl = scsi_sglist(scp); 2335 if (sg_page(sgl)) { 2336 c = *(unsigned char *) sg_virt(&sgl[0]); 2337 } else { 2338 con_log(CL_ANN, (KERN_WARNING 2339 "megaraid mailbox: invalid sg:%d\n", 2340 __LINE__)); 2341 c = 0; 2342 } 2343 2344 if ((c & 0x1F ) == TYPE_DISK) { 2345 pdev_index = (scb->dev_channel * 16) + 2346 scb->dev_target; 2347 pdev_state = 2348 raid_dev->pdrv_state[pdev_index] & 0x0F; 2349 2350 if (pdev_state == PDRV_ONLINE || 2351 pdev_state == PDRV_FAILED || 2352 pdev_state == PDRV_RBLD || 2353 pdev_state == PDRV_HOTSPARE || 2354 megaraid_expose_unconf_disks == 0) { 2355 2356 status = 0xF0; 2357 } 2358 } 2359 } 2360 2361 // Convert MegaRAID status to Linux error code 2362 switch (status) { 2363 2364 case 0x00: 2365 2366 scp->result = (DID_OK << 16); 2367 break; 2368 2369 case 0x02: 2370 2371 /* set sense_buffer and result fields */ 2372 if (mbox->cmd == MBOXCMD_PASSTHRU || 2373 mbox->cmd == MBOXCMD_PASSTHRU64) { 2374 2375 memcpy(scp->sense_buffer, pthru->reqsensearea, 2376 14); 2377 2378 scp->result = DRIVER_SENSE << 24 | 2379 DID_OK << 16 | CHECK_CONDITION << 1; 2380 } 2381 else { 2382 if (mbox->cmd == MBOXCMD_EXTPTHRU) { 2383 2384 memcpy(scp->sense_buffer, 2385 epthru->reqsensearea, 14); 2386 2387 scp->result = DRIVER_SENSE << 24 | 2388 DID_OK << 16 | 2389 CHECK_CONDITION << 1; 2390 } else { 2391 scp->sense_buffer[0] = 0x70; 2392 scp->sense_buffer[2] = ABORTED_COMMAND; 2393 scp->result = CHECK_CONDITION << 1; 2394 } 2395 } 2396 break; 2397 2398 case 0x08: 2399 2400 scp->result = DID_BUS_BUSY << 16 | status; 2401 break; 2402 2403 default: 2404 2405 /* 2406 * If TEST_UNIT_READY fails, we know RESERVATION_STATUS 2407 * failed 2408 */ 2409 if (scp->cmnd[0] == TEST_UNIT_READY) { 2410 scp->result = DID_ERROR << 16 | 2411 RESERVATION_CONFLICT << 1; 2412 } 2413 else 2414 /* 2415 * Error code returned is 1 if Reserve or Release 2416 * failed or the input parameter is invalid 2417 */ 2418 if (status == 1 && (scp->cmnd[0] == RESERVE || 2419 scp->cmnd[0] == RELEASE)) { 2420 2421 scp->result = DID_ERROR << 16 | 2422 RESERVATION_CONFLICT << 1; 2423 } 2424 else { 2425 scp->result = DID_BAD_TARGET << 16 | status; 2426 } 2427 } 2428 2429 // print a debug message for all failed commands 2430 if (status) { 2431 megaraid_mbox_display_scb(adapter, scb); 2432 } 2433 2434 // Free our internal resources and call the mid-layer callback 2435 // routine 2436 megaraid_mbox_sync_scb(adapter, scb); 2437 2438 // remove from local clist 2439 list_del_init(&scb->list); 2440 2441 // put back in free list 2442 megaraid_dealloc_scb(adapter, scb); 2443 2444 // send the scsi packet back to kernel 2445 scp->scsi_done(scp); 2446 } 2447 2448 return; 2449 } 2450 2451 2452 /** 2453 * megaraid_abort_handler - abort the scsi command 2454 * @scp : command to be aborted 2455 * 2456 * Abort a previous SCSI request. Only commands on the pending list can be 2457 * aborted. All the commands issued to the F/W must complete. 2458 **/ 2459 static int 2460 megaraid_abort_handler(struct scsi_cmnd *scp) 2461 { 2462 adapter_t *adapter; 2463 mraid_device_t *raid_dev; 2464 scb_t *scb; 2465 scb_t *tmp; 2466 int found; 2467 unsigned long flags; 2468 int i; 2469 2470 2471 adapter = SCP2ADAPTER(scp); 2472 raid_dev = ADAP2RAIDDEV(adapter); 2473 2474 con_log(CL_ANN, (KERN_WARNING 2475 "megaraid: aborting-%ld cmd=%x <c=%d t=%d l=%d>\n", 2476 scp->serial_number, scp->cmnd[0], SCP2CHANNEL(scp), 2477 SCP2TARGET(scp), SCP2LUN(scp))); 2478 2479 // If FW has stopped responding, simply return failure 2480 if (raid_dev->hw_error) { 2481 con_log(CL_ANN, (KERN_NOTICE 2482 "megaraid: hw error, not aborting\n")); 2483 return FAILED; 2484 } 2485 2486 // There might a race here, where the command was completed by the 2487 // firmware and now it is on the completed list. Before we could 2488 // complete the command to the kernel in dpc, the abort came. 2489 // Find out if this is the case to avoid the race. 2490 scb = NULL; 2491 spin_lock_irqsave(COMPLETED_LIST_LOCK(adapter), flags); 2492 list_for_each_entry_safe(scb, tmp, &adapter->completed_list, list) { 2493 2494 if (scb->scp == scp) { // Found command 2495 2496 list_del_init(&scb->list); // from completed list 2497 2498 con_log(CL_ANN, (KERN_WARNING 2499 "megaraid: %ld:%d[%d:%d], abort from completed list\n", 2500 scp->serial_number, scb->sno, 2501 scb->dev_channel, scb->dev_target)); 2502 2503 scp->result = (DID_ABORT << 16); 2504 scp->scsi_done(scp); 2505 2506 megaraid_dealloc_scb(adapter, scb); 2507 2508 spin_unlock_irqrestore(COMPLETED_LIST_LOCK(adapter), 2509 flags); 2510 2511 return SUCCESS; 2512 } 2513 } 2514 spin_unlock_irqrestore(COMPLETED_LIST_LOCK(adapter), flags); 2515 2516 2517 // Find out if this command is still on the pending list. If it is and 2518 // was never issued, abort and return success. If the command is owned 2519 // by the firmware, we must wait for it to complete by the FW. 2520 spin_lock_irqsave(PENDING_LIST_LOCK(adapter), flags); 2521 list_for_each_entry_safe(scb, tmp, &adapter->pend_list, list) { 2522 2523 if (scb->scp == scp) { // Found command 2524 2525 list_del_init(&scb->list); // from pending list 2526 2527 ASSERT(!(scb->state & SCB_ISSUED)); 2528 2529 con_log(CL_ANN, (KERN_WARNING 2530 "megaraid abort: %ld[%d:%d], driver owner\n", 2531 scp->serial_number, scb->dev_channel, 2532 scb->dev_target)); 2533 2534 scp->result = (DID_ABORT << 16); 2535 scp->scsi_done(scp); 2536 2537 megaraid_dealloc_scb(adapter, scb); 2538 2539 spin_unlock_irqrestore(PENDING_LIST_LOCK(adapter), 2540 flags); 2541 2542 return SUCCESS; 2543 } 2544 } 2545 spin_unlock_irqrestore(PENDING_LIST_LOCK(adapter), flags); 2546 2547 2548 // Check do we even own this command, in which case this would be 2549 // owned by the firmware. The only way to locate the FW scb is to 2550 // traverse through the list of all SCB, since driver does not 2551 // maintain these SCBs on any list 2552 found = 0; 2553 spin_lock_irq(&adapter->lock); 2554 for (i = 0; i < MBOX_MAX_SCSI_CMDS; i++) { 2555 scb = adapter->kscb_list + i; 2556 2557 if (scb->scp == scp) { 2558 2559 found = 1; 2560 2561 if (!(scb->state & SCB_ISSUED)) { 2562 con_log(CL_ANN, (KERN_WARNING 2563 "megaraid abort: %ld%d[%d:%d], invalid state\n", 2564 scp->serial_number, scb->sno, scb->dev_channel, 2565 scb->dev_target)); 2566 BUG(); 2567 } 2568 else { 2569 con_log(CL_ANN, (KERN_WARNING 2570 "megaraid abort: %ld:%d[%d:%d], fw owner\n", 2571 scp->serial_number, scb->sno, scb->dev_channel, 2572 scb->dev_target)); 2573 } 2574 } 2575 } 2576 spin_unlock_irq(&adapter->lock); 2577 2578 if (!found) { 2579 con_log(CL_ANN, (KERN_WARNING 2580 "megaraid abort: scsi cmd:%ld, do now own\n", 2581 scp->serial_number)); 2582 2583 // FIXME: Should there be a callback for this command? 2584 return SUCCESS; 2585 } 2586 2587 // We cannot actually abort a command owned by firmware, return 2588 // failure and wait for reset. In host reset handler, we will find out 2589 // if the HBA is still live 2590 return FAILED; 2591 } 2592 2593 /** 2594 * megaraid_reset_handler - device reset hadler for mailbox based driver 2595 * @scp : reference command 2596 * 2597 * Reset handler for the mailbox based controller. First try to find out if 2598 * the FW is still live, in which case the outstanding commands counter mut go 2599 * down to 0. If that happens, also issue the reservation reset command to 2600 * relinquish (possible) reservations on the logical drives connected to this 2601 * host. 2602 **/ 2603 static int 2604 megaraid_reset_handler(struct scsi_cmnd *scp) 2605 { 2606 adapter_t *adapter; 2607 scb_t *scb; 2608 scb_t *tmp; 2609 mraid_device_t *raid_dev; 2610 unsigned long flags; 2611 uint8_t raw_mbox[sizeof(mbox_t)]; 2612 int rval; 2613 int recovery_window; 2614 int recovering; 2615 int i; 2616 uioc_t *kioc; 2617 2618 adapter = SCP2ADAPTER(scp); 2619 raid_dev = ADAP2RAIDDEV(adapter); 2620 2621 // return failure if adapter is not responding 2622 if (raid_dev->hw_error) { 2623 con_log(CL_ANN, (KERN_NOTICE 2624 "megaraid: hw error, cannot reset\n")); 2625 return FAILED; 2626 } 2627 2628 2629 // Under exceptional conditions, FW can take up to 3 minutes to 2630 // complete command processing. Wait for additional 2 minutes for the 2631 // pending commands counter to go down to 0. If it doesn't, let the 2632 // controller be marked offline 2633 // Also, reset all the commands currently owned by the driver 2634 spin_lock_irqsave(PENDING_LIST_LOCK(adapter), flags); 2635 list_for_each_entry_safe(scb, tmp, &adapter->pend_list, list) { 2636 list_del_init(&scb->list); // from pending list 2637 2638 if (scb->sno >= MBOX_MAX_SCSI_CMDS) { 2639 con_log(CL_ANN, (KERN_WARNING 2640 "megaraid: IOCTL packet with %d[%d:%d] being reset\n", 2641 scb->sno, scb->dev_channel, scb->dev_target)); 2642 2643 scb->status = -1; 2644 2645 kioc = (uioc_t *)scb->gp; 2646 kioc->status = -EFAULT; 2647 2648 megaraid_mbox_mm_done(adapter, scb); 2649 } else { 2650 if (scb->scp == scp) { // Found command 2651 con_log(CL_ANN, (KERN_WARNING 2652 "megaraid: %ld:%d[%d:%d], reset from pending list\n", 2653 scp->serial_number, scb->sno, 2654 scb->dev_channel, scb->dev_target)); 2655 } else { 2656 con_log(CL_ANN, (KERN_WARNING 2657 "megaraid: IO packet with %d[%d:%d] being reset\n", 2658 scb->sno, scb->dev_channel, scb->dev_target)); 2659 } 2660 2661 scb->scp->result = (DID_RESET << 16); 2662 scb->scp->scsi_done(scb->scp); 2663 2664 megaraid_dealloc_scb(adapter, scb); 2665 } 2666 } 2667 spin_unlock_irqrestore(PENDING_LIST_LOCK(adapter), flags); 2668 2669 if (adapter->outstanding_cmds) { 2670 con_log(CL_ANN, (KERN_NOTICE 2671 "megaraid: %d outstanding commands. Max wait %d sec\n", 2672 adapter->outstanding_cmds, 2673 (MBOX_RESET_WAIT + MBOX_RESET_EXT_WAIT))); 2674 } 2675 2676 recovery_window = MBOX_RESET_WAIT + MBOX_RESET_EXT_WAIT; 2677 2678 recovering = adapter->outstanding_cmds; 2679 2680 for (i = 0; i < recovery_window; i++) { 2681 2682 megaraid_ack_sequence(adapter); 2683 2684 // print a message once every 5 seconds only 2685 if (!(i % 5)) { 2686 con_log(CL_ANN, ( 2687 "megaraid mbox: Wait for %d commands to complete:%d\n", 2688 adapter->outstanding_cmds, 2689 (MBOX_RESET_WAIT + MBOX_RESET_EXT_WAIT) - i)); 2690 } 2691 2692 // bailout if no recovery happended in reset time 2693 if (adapter->outstanding_cmds == 0) { 2694 break; 2695 } 2696 2697 msleep(1000); 2698 } 2699 2700 spin_lock(&adapter->lock); 2701 2702 // If still outstanding commands, bail out 2703 if (adapter->outstanding_cmds) { 2704 con_log(CL_ANN, (KERN_WARNING 2705 "megaraid mbox: critical hardware error!\n")); 2706 2707 raid_dev->hw_error = 1; 2708 2709 rval = FAILED; 2710 goto out; 2711 } 2712 else { 2713 con_log(CL_ANN, (KERN_NOTICE 2714 "megaraid mbox: reset sequence completed successfully\n")); 2715 } 2716 2717 2718 // If the controller supports clustering, reset reservations 2719 if (!adapter->ha) { 2720 rval = SUCCESS; 2721 goto out; 2722 } 2723 2724 // clear reservations if any 2725 raw_mbox[0] = CLUSTER_CMD; 2726 raw_mbox[2] = RESET_RESERVATIONS; 2727 2728 rval = SUCCESS; 2729 if (mbox_post_sync_cmd_fast(adapter, raw_mbox) == 0) { 2730 con_log(CL_ANN, 2731 (KERN_INFO "megaraid: reservation reset\n")); 2732 } 2733 else { 2734 rval = FAILED; 2735 con_log(CL_ANN, (KERN_WARNING 2736 "megaraid: reservation reset failed\n")); 2737 } 2738 2739 out: 2740 spin_unlock_irq(&adapter->lock); 2741 return rval; 2742 } 2743 2744 /* 2745 * START: internal commands library 2746 * 2747 * This section of the driver has the common routine used by the driver and 2748 * also has all the FW routines 2749 */ 2750 2751 /** 2752 * mbox_post_sync_cmd() - blocking command to the mailbox based controllers 2753 * @adapter : controller's soft state 2754 * @raw_mbox : the mailbox 2755 * 2756 * Issue a scb in synchronous and non-interrupt mode for mailbox based 2757 * controllers. 2758 */ 2759 static int 2760 mbox_post_sync_cmd(adapter_t *adapter, uint8_t raw_mbox[]) 2761 { 2762 mraid_device_t *raid_dev = ADAP2RAIDDEV(adapter); 2763 mbox64_t *mbox64; 2764 mbox_t *mbox; 2765 uint8_t status; 2766 int i; 2767 2768 2769 mbox64 = raid_dev->mbox64; 2770 mbox = raid_dev->mbox; 2771 2772 /* 2773 * Wait until mailbox is free 2774 */ 2775 if (megaraid_busywait_mbox(raid_dev) != 0) 2776 goto blocked_mailbox; 2777 2778 /* 2779 * Copy mailbox data into host structure 2780 */ 2781 memcpy((caddr_t)mbox, (caddr_t)raw_mbox, 16); 2782 mbox->cmdid = 0xFE; 2783 mbox->busy = 1; 2784 mbox->poll = 0; 2785 mbox->ack = 0; 2786 mbox->numstatus = 0xFF; 2787 mbox->status = 0xFF; 2788 2789 wmb(); 2790 WRINDOOR(raid_dev, raid_dev->mbox_dma | 0x1); 2791 2792 // wait for maximum 1 second for status to post. If the status is not 2793 // available within 1 second, assume FW is initializing and wait 2794 // for an extended amount of time 2795 if (mbox->numstatus == 0xFF) { // status not yet available 2796 udelay(25); 2797 2798 for (i = 0; mbox->numstatus == 0xFF && i < 1000; i++) { 2799 rmb(); 2800 msleep(1); 2801 } 2802 2803 2804 if (i == 1000) { 2805 con_log(CL_ANN, (KERN_NOTICE 2806 "megaraid mailbox: wait for FW to boot ")); 2807 2808 for (i = 0; (mbox->numstatus == 0xFF) && 2809 (i < MBOX_RESET_WAIT); i++) { 2810 rmb(); 2811 con_log(CL_ANN, ("\b\b\b\b\b[%03d]", 2812 MBOX_RESET_WAIT - i)); 2813 msleep(1000); 2814 } 2815 2816 if (i == MBOX_RESET_WAIT) { 2817 2818 con_log(CL_ANN, ( 2819 "\nmegaraid mailbox: status not available\n")); 2820 2821 return -1; 2822 } 2823 con_log(CL_ANN, ("\b\b\b\b\b[ok] \n")); 2824 } 2825 } 2826 2827 // wait for maximum 1 second for poll semaphore 2828 if (mbox->poll != 0x77) { 2829 udelay(25); 2830 2831 for (i = 0; (mbox->poll != 0x77) && (i < 1000); i++) { 2832 rmb(); 2833 msleep(1); 2834 } 2835 2836 if (i == 1000) { 2837 con_log(CL_ANN, (KERN_WARNING 2838 "megaraid mailbox: could not get poll semaphore\n")); 2839 return -1; 2840 } 2841 } 2842 2843 WRINDOOR(raid_dev, raid_dev->mbox_dma | 0x2); 2844 wmb(); 2845 2846 // wait for maximum 1 second for acknowledgement 2847 if (RDINDOOR(raid_dev) & 0x2) { 2848 udelay(25); 2849 2850 for (i = 0; (RDINDOOR(raid_dev) & 0x2) && (i < 1000); i++) { 2851 rmb(); 2852 msleep(1); 2853 } 2854 2855 if (i == 1000) { 2856 con_log(CL_ANN, (KERN_WARNING 2857 "megaraid mailbox: could not acknowledge\n")); 2858 return -1; 2859 } 2860 } 2861 mbox->poll = 0; 2862 mbox->ack = 0x77; 2863 2864 status = mbox->status; 2865 2866 // invalidate the completed command id array. After command 2867 // completion, firmware would write the valid id. 2868 mbox->numstatus = 0xFF; 2869 mbox->status = 0xFF; 2870 for (i = 0; i < MBOX_MAX_FIRMWARE_STATUS; i++) { 2871 mbox->completed[i] = 0xFF; 2872 } 2873 2874 return status; 2875 2876 blocked_mailbox: 2877 2878 con_log(CL_ANN, (KERN_WARNING "megaraid: blocked mailbox\n") ); 2879 return -1; 2880 } 2881 2882 2883 /** 2884 * mbox_post_sync_cmd_fast - blocking command to the mailbox based controllers 2885 * @adapter : controller's soft state 2886 * @raw_mbox : the mailbox 2887 * 2888 * Issue a scb in synchronous and non-interrupt mode for mailbox based 2889 * controllers. This is a faster version of the synchronous command and 2890 * therefore can be called in interrupt-context as well. 2891 */ 2892 static int 2893 mbox_post_sync_cmd_fast(adapter_t *adapter, uint8_t raw_mbox[]) 2894 { 2895 mraid_device_t *raid_dev = ADAP2RAIDDEV(adapter); 2896 mbox_t *mbox; 2897 long i; 2898 2899 2900 mbox = raid_dev->mbox; 2901 2902 // return immediately if the mailbox is busy 2903 if (mbox->busy) return -1; 2904 2905 // Copy mailbox data into host structure 2906 memcpy((caddr_t)mbox, (caddr_t)raw_mbox, 14); 2907 mbox->cmdid = 0xFE; 2908 mbox->busy = 1; 2909 mbox->poll = 0; 2910 mbox->ack = 0; 2911 mbox->numstatus = 0xFF; 2912 mbox->status = 0xFF; 2913 2914 wmb(); 2915 WRINDOOR(raid_dev, raid_dev->mbox_dma | 0x1); 2916 2917 for (i = 0; i < MBOX_SYNC_WAIT_CNT; i++) { 2918 if (mbox->numstatus != 0xFF) break; 2919 rmb(); 2920 udelay(MBOX_SYNC_DELAY_200); 2921 } 2922 2923 if (i == MBOX_SYNC_WAIT_CNT) { 2924 // We may need to re-calibrate the counter 2925 con_log(CL_ANN, (KERN_CRIT 2926 "megaraid: fast sync command timed out\n")); 2927 } 2928 2929 WRINDOOR(raid_dev, raid_dev->mbox_dma | 0x2); 2930 wmb(); 2931 2932 return mbox->status; 2933 } 2934 2935 2936 /** 2937 * megaraid_busywait_mbox() - Wait until the controller's mailbox is available 2938 * @raid_dev : RAID device (HBA) soft state 2939 * 2940 * Wait until the controller's mailbox is available to accept more commands. 2941 * Wait for at most 1 second. 2942 */ 2943 static int 2944 megaraid_busywait_mbox(mraid_device_t *raid_dev) 2945 { 2946 mbox_t *mbox = raid_dev->mbox; 2947 int i = 0; 2948 2949 if (mbox->busy) { 2950 udelay(25); 2951 for (i = 0; mbox->busy && i < 1000; i++) 2952 msleep(1); 2953 } 2954 2955 if (i < 1000) return 0; 2956 else return -1; 2957 } 2958 2959 2960 /** 2961 * megaraid_mbox_product_info - some static information about the controller 2962 * @adapter : our soft state 2963 * 2964 * Issue commands to the controller to grab some parameters required by our 2965 * caller. 2966 */ 2967 static int 2968 megaraid_mbox_product_info(adapter_t *adapter) 2969 { 2970 mraid_device_t *raid_dev = ADAP2RAIDDEV(adapter); 2971 mbox_t *mbox; 2972 uint8_t raw_mbox[sizeof(mbox_t)]; 2973 mraid_pinfo_t *pinfo; 2974 dma_addr_t pinfo_dma_h; 2975 mraid_inquiry3_t *mraid_inq3; 2976 int i; 2977 2978 2979 memset((caddr_t)raw_mbox, 0, sizeof(raw_mbox)); 2980 mbox = (mbox_t *)raw_mbox; 2981 2982 /* 2983 * Issue an ENQUIRY3 command to find out certain adapter parameters, 2984 * e.g., max channels, max commands etc. 2985 */ 2986 pinfo = pci_alloc_consistent(adapter->pdev, sizeof(mraid_pinfo_t), 2987 &pinfo_dma_h); 2988 2989 if (pinfo == NULL) { 2990 con_log(CL_ANN, (KERN_WARNING 2991 "megaraid: out of memory, %s %d\n", __func__, 2992 __LINE__)); 2993 2994 return -1; 2995 } 2996 memset(pinfo, 0, sizeof(mraid_pinfo_t)); 2997 2998 mbox->xferaddr = (uint32_t)adapter->ibuf_dma_h; 2999 memset((void *)adapter->ibuf, 0, MBOX_IBUF_SIZE); 3000 3001 raw_mbox[0] = FC_NEW_CONFIG; 3002 raw_mbox[2] = NC_SUBOP_ENQUIRY3; 3003 raw_mbox[3] = ENQ3_GET_SOLICITED_FULL; 3004 3005 // Issue the command 3006 if (mbox_post_sync_cmd(adapter, raw_mbox) != 0) { 3007 3008 con_log(CL_ANN, (KERN_WARNING "megaraid: Inquiry3 failed\n")); 3009 3010 pci_free_consistent(adapter->pdev, sizeof(mraid_pinfo_t), 3011 pinfo, pinfo_dma_h); 3012 3013 return -1; 3014 } 3015 3016 /* 3017 * Collect information about state of each physical drive 3018 * attached to the controller. We will expose all the disks 3019 * which are not part of RAID 3020 */ 3021 mraid_inq3 = (mraid_inquiry3_t *)adapter->ibuf; 3022 for (i = 0; i < MBOX_MAX_PHYSICAL_DRIVES; i++) { 3023 raid_dev->pdrv_state[i] = mraid_inq3->pdrv_state[i]; 3024 } 3025 3026 /* 3027 * Get product info for information like number of channels, 3028 * maximum commands supported. 3029 */ 3030 memset((caddr_t)raw_mbox, 0, sizeof(raw_mbox)); 3031 mbox->xferaddr = (uint32_t)pinfo_dma_h; 3032 3033 raw_mbox[0] = FC_NEW_CONFIG; 3034 raw_mbox[2] = NC_SUBOP_PRODUCT_INFO; 3035 3036 if (mbox_post_sync_cmd(adapter, raw_mbox) != 0) { 3037 3038 con_log(CL_ANN, (KERN_WARNING 3039 "megaraid: product info failed\n")); 3040 3041 pci_free_consistent(adapter->pdev, sizeof(mraid_pinfo_t), 3042 pinfo, pinfo_dma_h); 3043 3044 return -1; 3045 } 3046 3047 /* 3048 * Setup some parameters for host, as required by our caller 3049 */ 3050 adapter->max_channel = pinfo->nchannels; 3051 3052 /* 3053 * we will export all the logical drives on a single channel. 3054 * Add 1 since inquires do not come for inititor ID 3055 */ 3056 adapter->max_target = MAX_LOGICAL_DRIVES_40LD + 1; 3057 adapter->max_lun = 8; // up to 8 LUNs for non-disk devices 3058 3059 /* 3060 * These are the maximum outstanding commands for the scsi-layer 3061 */ 3062 adapter->max_cmds = MBOX_MAX_SCSI_CMDS; 3063 3064 memset(adapter->fw_version, 0, VERSION_SIZE); 3065 memset(adapter->bios_version, 0, VERSION_SIZE); 3066 3067 memcpy(adapter->fw_version, pinfo->fw_version, 4); 3068 adapter->fw_version[4] = 0; 3069 3070 memcpy(adapter->bios_version, pinfo->bios_version, 4); 3071 adapter->bios_version[4] = 0; 3072 3073 con_log(CL_ANN, (KERN_NOTICE 3074 "megaraid: fw version:[%s] bios version:[%s]\n", 3075 adapter->fw_version, adapter->bios_version)); 3076 3077 pci_free_consistent(adapter->pdev, sizeof(mraid_pinfo_t), pinfo, 3078 pinfo_dma_h); 3079 3080 return 0; 3081 } 3082 3083 3084 3085 /** 3086 * megaraid_mbox_extended_cdb - check for support for extended CDBs 3087 * @adapter : soft state for the controller 3088 * 3089 * This routine check whether the controller in question supports extended 3090 * ( > 10 bytes ) CDBs. 3091 */ 3092 static int 3093 megaraid_mbox_extended_cdb(adapter_t *adapter) 3094 { 3095 mbox_t *mbox; 3096 uint8_t raw_mbox[sizeof(mbox_t)]; 3097 int rval; 3098 3099 mbox = (mbox_t *)raw_mbox; 3100 3101 memset((caddr_t)raw_mbox, 0, sizeof(raw_mbox)); 3102 mbox->xferaddr = (uint32_t)adapter->ibuf_dma_h; 3103 3104 memset((void *)adapter->ibuf, 0, MBOX_IBUF_SIZE); 3105 3106 raw_mbox[0] = MAIN_MISC_OPCODE; 3107 raw_mbox[2] = SUPPORT_EXT_CDB; 3108 3109 /* 3110 * Issue the command 3111 */ 3112 rval = 0; 3113 if (mbox_post_sync_cmd(adapter, raw_mbox) != 0) { 3114 rval = -1; 3115 } 3116 3117 return rval; 3118 } 3119 3120 3121 /** 3122 * megaraid_mbox_support_ha - Do we support clustering 3123 * @adapter : soft state for the controller 3124 * @init_id : ID of the initiator 3125 * 3126 * Determine if the firmware supports clustering and the ID of the initiator. 3127 */ 3128 static int 3129 megaraid_mbox_support_ha(adapter_t *adapter, uint16_t *init_id) 3130 { 3131 mbox_t *mbox; 3132 uint8_t raw_mbox[sizeof(mbox_t)]; 3133 int rval; 3134 3135 3136 mbox = (mbox_t *)raw_mbox; 3137 3138 memset((caddr_t)raw_mbox, 0, sizeof(raw_mbox)); 3139 3140 mbox->xferaddr = (uint32_t)adapter->ibuf_dma_h; 3141 3142 memset((void *)adapter->ibuf, 0, MBOX_IBUF_SIZE); 3143 3144 raw_mbox[0] = GET_TARGET_ID; 3145 3146 // Issue the command 3147 *init_id = 7; 3148 rval = -1; 3149 if (mbox_post_sync_cmd(adapter, raw_mbox) == 0) { 3150 3151 *init_id = *(uint8_t *)adapter->ibuf; 3152 3153 con_log(CL_ANN, (KERN_INFO 3154 "megaraid: cluster firmware, initiator ID: %d\n", 3155 *init_id)); 3156 3157 rval = 0; 3158 } 3159 3160 return rval; 3161 } 3162 3163 3164 /** 3165 * megaraid_mbox_support_random_del - Do we support random deletion 3166 * @adapter : soft state for the controller 3167 * 3168 * Determine if the firmware supports random deletion. 3169 * Return: 1 is operation supported, 0 otherwise 3170 */ 3171 static int 3172 megaraid_mbox_support_random_del(adapter_t *adapter) 3173 { 3174 mbox_t *mbox; 3175 uint8_t raw_mbox[sizeof(mbox_t)]; 3176 int rval; 3177 3178 /* 3179 * Newer firmware on Dell CERC expect a different 3180 * random deletion handling, so disable it. 3181 */ 3182 if (adapter->pdev->vendor == PCI_VENDOR_ID_AMI && 3183 adapter->pdev->device == PCI_DEVICE_ID_AMI_MEGARAID3 && 3184 adapter->pdev->subsystem_vendor == PCI_VENDOR_ID_DELL && 3185 adapter->pdev->subsystem_device == PCI_SUBSYS_ID_CERC_ATA100_4CH && 3186 (adapter->fw_version[0] > '6' || 3187 (adapter->fw_version[0] == '6' && 3188 adapter->fw_version[2] > '6') || 3189 (adapter->fw_version[0] == '6' 3190 && adapter->fw_version[2] == '6' 3191 && adapter->fw_version[3] > '1'))) { 3192 con_log(CL_DLEVEL1, ("megaraid: disable random deletion\n")); 3193 return 0; 3194 } 3195 3196 mbox = (mbox_t *)raw_mbox; 3197 3198 memset((caddr_t)raw_mbox, 0, sizeof(mbox_t)); 3199 3200 raw_mbox[0] = FC_DEL_LOGDRV; 3201 raw_mbox[2] = OP_SUP_DEL_LOGDRV; 3202 3203 // Issue the command 3204 rval = 0; 3205 if (mbox_post_sync_cmd(adapter, raw_mbox) == 0) { 3206 3207 con_log(CL_DLEVEL1, ("megaraid: supports random deletion\n")); 3208 3209 rval = 1; 3210 } 3211 3212 return rval; 3213 } 3214 3215 3216 /** 3217 * megaraid_mbox_get_max_sg - maximum sg elements supported by the firmware 3218 * @adapter : soft state for the controller 3219 * 3220 * Find out the maximum number of scatter-gather elements supported by the 3221 * firmware. 3222 */ 3223 static int 3224 megaraid_mbox_get_max_sg(adapter_t *adapter) 3225 { 3226 mbox_t *mbox; 3227 uint8_t raw_mbox[sizeof(mbox_t)]; 3228 int nsg; 3229 3230 3231 mbox = (mbox_t *)raw_mbox; 3232 3233 memset((caddr_t)raw_mbox, 0, sizeof(mbox_t)); 3234 3235 mbox->xferaddr = (uint32_t)adapter->ibuf_dma_h; 3236 3237 memset((void *)adapter->ibuf, 0, MBOX_IBUF_SIZE); 3238 3239 raw_mbox[0] = MAIN_MISC_OPCODE; 3240 raw_mbox[2] = GET_MAX_SG_SUPPORT; 3241 3242 // Issue the command 3243 if (mbox_post_sync_cmd(adapter, raw_mbox) == 0) { 3244 nsg = *(uint8_t *)adapter->ibuf; 3245 } 3246 else { 3247 nsg = MBOX_DEFAULT_SG_SIZE; 3248 } 3249 3250 if (nsg > MBOX_MAX_SG_SIZE) nsg = MBOX_MAX_SG_SIZE; 3251 3252 return nsg; 3253 } 3254 3255 3256 /** 3257 * megaraid_mbox_enum_raid_scsi - enumerate the RAID and SCSI channels 3258 * @adapter : soft state for the controller 3259 * 3260 * Enumerate the RAID and SCSI channels for ROMB platforms so that channels 3261 * can be exported as regular SCSI channels. 3262 */ 3263 static void 3264 megaraid_mbox_enum_raid_scsi(adapter_t *adapter) 3265 { 3266 mraid_device_t *raid_dev = ADAP2RAIDDEV(adapter); 3267 mbox_t *mbox; 3268 uint8_t raw_mbox[sizeof(mbox_t)]; 3269 3270 3271 mbox = (mbox_t *)raw_mbox; 3272 3273 memset((caddr_t)raw_mbox, 0, sizeof(mbox_t)); 3274 3275 mbox->xferaddr = (uint32_t)adapter->ibuf_dma_h; 3276 3277 memset((void *)adapter->ibuf, 0, MBOX_IBUF_SIZE); 3278 3279 raw_mbox[0] = CHNL_CLASS; 3280 raw_mbox[2] = GET_CHNL_CLASS; 3281 3282 // Issue the command. If the command fails, all channels are RAID 3283 // channels 3284 raid_dev->channel_class = 0xFF; 3285 if (mbox_post_sync_cmd(adapter, raw_mbox) == 0) { 3286 raid_dev->channel_class = *(uint8_t *)adapter->ibuf; 3287 } 3288 3289 return; 3290 } 3291 3292 3293 /** 3294 * megaraid_mbox_flush_cache - flush adapter and disks cache 3295 * @adapter : soft state for the controller 3296 * 3297 * Flush adapter cache followed by disks cache. 3298 */ 3299 static void 3300 megaraid_mbox_flush_cache(adapter_t *adapter) 3301 { 3302 mbox_t *mbox; 3303 uint8_t raw_mbox[sizeof(mbox_t)]; 3304 3305 3306 mbox = (mbox_t *)raw_mbox; 3307 3308 memset((caddr_t)raw_mbox, 0, sizeof(mbox_t)); 3309 3310 raw_mbox[0] = FLUSH_ADAPTER; 3311 3312 if (mbox_post_sync_cmd(adapter, raw_mbox) != 0) { 3313 con_log(CL_ANN, ("megaraid: flush adapter failed\n")); 3314 } 3315 3316 raw_mbox[0] = FLUSH_SYSTEM; 3317 3318 if (mbox_post_sync_cmd(adapter, raw_mbox) != 0) { 3319 con_log(CL_ANN, ("megaraid: flush disks cache failed\n")); 3320 } 3321 3322 return; 3323 } 3324 3325 3326 /** 3327 * megaraid_mbox_fire_sync_cmd - fire the sync cmd 3328 * @adapter : soft state for the controller 3329 * 3330 * Clears the pending cmds in FW and reinits its RAID structs. 3331 */ 3332 static int 3333 megaraid_mbox_fire_sync_cmd(adapter_t *adapter) 3334 { 3335 mbox_t *mbox; 3336 uint8_t raw_mbox[sizeof(mbox_t)]; 3337 mraid_device_t *raid_dev = ADAP2RAIDDEV(adapter); 3338 mbox64_t *mbox64; 3339 int status = 0; 3340 int i; 3341 uint32_t dword; 3342 3343 mbox = (mbox_t *)raw_mbox; 3344 3345 memset((caddr_t)raw_mbox, 0, sizeof(mbox_t)); 3346 3347 raw_mbox[0] = 0xFF; 3348 3349 mbox64 = raid_dev->mbox64; 3350 mbox = raid_dev->mbox; 3351 3352 /* Wait until mailbox is free */ 3353 if (megaraid_busywait_mbox(raid_dev) != 0) { 3354 status = 1; 3355 goto blocked_mailbox; 3356 } 3357 3358 /* Copy mailbox data into host structure */ 3359 memcpy((caddr_t)mbox, (caddr_t)raw_mbox, 16); 3360 mbox->cmdid = 0xFE; 3361 mbox->busy = 1; 3362 mbox->poll = 0; 3363 mbox->ack = 0; 3364 mbox->numstatus = 0; 3365 mbox->status = 0; 3366 3367 wmb(); 3368 WRINDOOR(raid_dev, raid_dev->mbox_dma | 0x1); 3369 3370 /* Wait for maximum 1 min for status to post. 3371 * If the Firmware SUPPORTS the ABOVE COMMAND, 3372 * mbox->cmd will be set to 0 3373 * else 3374 * the firmware will reject the command with 3375 * mbox->numstatus set to 1 3376 */ 3377 3378 i = 0; 3379 status = 0; 3380 while (!mbox->numstatus && mbox->cmd == 0xFF) { 3381 rmb(); 3382 msleep(1); 3383 i++; 3384 if (i > 1000 * 60) { 3385 status = 1; 3386 break; 3387 } 3388 } 3389 if (mbox->numstatus == 1) 3390 status = 1; /*cmd not supported*/ 3391 3392 /* Check for interrupt line */ 3393 dword = RDOUTDOOR(raid_dev); 3394 WROUTDOOR(raid_dev, dword); 3395 WRINDOOR(raid_dev,2); 3396 3397 return status; 3398 3399 blocked_mailbox: 3400 con_log(CL_ANN, (KERN_WARNING "megaraid: blocked mailbox\n")); 3401 return status; 3402 } 3403 3404 /** 3405 * megaraid_mbox_display_scb - display SCB information, mostly debug purposes 3406 * @adapter : controller's soft state 3407 * @scb : SCB to be displayed 3408 * @level : debug level for console print 3409 * 3410 * Diplay information about the given SCB iff the current debug level is 3411 * verbose. 3412 */ 3413 static void 3414 megaraid_mbox_display_scb(adapter_t *adapter, scb_t *scb) 3415 { 3416 mbox_ccb_t *ccb; 3417 struct scsi_cmnd *scp; 3418 mbox_t *mbox; 3419 int level; 3420 int i; 3421 3422 3423 ccb = (mbox_ccb_t *)scb->ccb; 3424 scp = scb->scp; 3425 mbox = ccb->mbox; 3426 3427 level = CL_DLEVEL3; 3428 3429 con_log(level, (KERN_NOTICE 3430 "megaraid mailbox: status:%#x cmd:%#x id:%#x ", scb->status, 3431 mbox->cmd, scb->sno)); 3432 3433 con_log(level, ("sec:%#x lba:%#x addr:%#x ld:%d sg:%d\n", 3434 mbox->numsectors, mbox->lba, mbox->xferaddr, mbox->logdrv, 3435 mbox->numsge)); 3436 3437 if (!scp) return; 3438 3439 con_log(level, (KERN_NOTICE "scsi cmnd: ")); 3440 3441 for (i = 0; i < scp->cmd_len; i++) { 3442 con_log(level, ("%#2.02x ", scp->cmnd[i])); 3443 } 3444 3445 con_log(level, ("\n")); 3446 3447 return; 3448 } 3449 3450 3451 /** 3452 * megaraid_mbox_setup_device_map - manage device ids 3453 * @adapter : Driver's soft state 3454 * 3455 * Manange the device ids to have an appropraite mapping between the kernel 3456 * scsi addresses and megaraid scsi and logical drive addresses. We export 3457 * scsi devices on their actual addresses, whereas the logical drives are 3458 * exported on a virtual scsi channel. 3459 */ 3460 static void 3461 megaraid_mbox_setup_device_map(adapter_t *adapter) 3462 { 3463 uint8_t c; 3464 uint8_t t; 3465 3466 /* 3467 * First fill the values on the logical drive channel 3468 */ 3469 for (t = 0; t < LSI_MAX_LOGICAL_DRIVES_64LD; t++) 3470 adapter->device_ids[adapter->max_channel][t] = 3471 (t < adapter->init_id) ? t : t - 1; 3472 3473 adapter->device_ids[adapter->max_channel][adapter->init_id] = 0xFF; 3474 3475 /* 3476 * Fill the values on the physical devices channels 3477 */ 3478 for (c = 0; c < adapter->max_channel; c++) 3479 for (t = 0; t < LSI_MAX_LOGICAL_DRIVES_64LD; t++) 3480 adapter->device_ids[c][t] = (c << 8) | t; 3481 } 3482 3483 3484 /* 3485 * END: internal commands library 3486 */ 3487 3488 /* 3489 * START: Interface for the common management module 3490 * 3491 * This is the module, which interfaces with the common management module to 3492 * provide support for ioctl and sysfs 3493 */ 3494 3495 /** 3496 * megaraid_cmm_register - register with the management module 3497 * @adapter : HBA soft state 3498 * 3499 * Register with the management module, which allows applications to issue 3500 * ioctl calls to the drivers. This interface is used by the management module 3501 * to setup sysfs support as well. 3502 */ 3503 static int 3504 megaraid_cmm_register(adapter_t *adapter) 3505 { 3506 mraid_device_t *raid_dev = ADAP2RAIDDEV(adapter); 3507 mraid_mmadp_t adp; 3508 scb_t *scb; 3509 mbox_ccb_t *ccb; 3510 int rval; 3511 int i; 3512 3513 // Allocate memory for the base list of scb for management module. 3514 adapter->uscb_list = kcalloc(MBOX_MAX_USER_CMDS, sizeof(scb_t), GFP_KERNEL); 3515 3516 if (adapter->uscb_list == NULL) { 3517 con_log(CL_ANN, (KERN_WARNING 3518 "megaraid: out of memory, %s %d\n", __func__, 3519 __LINE__)); 3520 return -1; 3521 } 3522 3523 3524 // Initialize the synchronization parameters for resources for 3525 // commands for management module 3526 INIT_LIST_HEAD(&adapter->uscb_pool); 3527 3528 spin_lock_init(USER_FREE_LIST_LOCK(adapter)); 3529 3530 3531 3532 // link all the packets. Note, CCB for commands, coming from the 3533 // commom management module, mailbox physical address are already 3534 // setup by it. We just need placeholder for that in our local command 3535 // control blocks 3536 for (i = 0; i < MBOX_MAX_USER_CMDS; i++) { 3537 3538 scb = adapter->uscb_list + i; 3539 ccb = raid_dev->uccb_list + i; 3540 3541 scb->ccb = (caddr_t)ccb; 3542 ccb->mbox64 = raid_dev->umbox64 + i; 3543 ccb->mbox = &ccb->mbox64->mbox32; 3544 ccb->raw_mbox = (uint8_t *)ccb->mbox; 3545 3546 scb->gp = 0; 3547 3548 // COMMAND ID 0 - (MBOX_MAX_SCSI_CMDS-1) ARE RESERVED FOR 3549 // COMMANDS COMING FROM IO SUBSYSTEM (MID-LAYER) 3550 scb->sno = i + MBOX_MAX_SCSI_CMDS; 3551 3552 scb->scp = NULL; 3553 scb->state = SCB_FREE; 3554 scb->dma_direction = PCI_DMA_NONE; 3555 scb->dma_type = MRAID_DMA_NONE; 3556 scb->dev_channel = -1; 3557 scb->dev_target = -1; 3558 3559 // put scb in the free pool 3560 list_add_tail(&scb->list, &adapter->uscb_pool); 3561 } 3562 3563 adp.unique_id = adapter->unique_id; 3564 adp.drvr_type = DRVRTYPE_MBOX; 3565 adp.drvr_data = (unsigned long)adapter; 3566 adp.pdev = adapter->pdev; 3567 adp.issue_uioc = megaraid_mbox_mm_handler; 3568 adp.timeout = MBOX_RESET_WAIT + MBOX_RESET_EXT_WAIT; 3569 adp.max_kioc = MBOX_MAX_USER_CMDS; 3570 3571 if ((rval = mraid_mm_register_adp(&adp)) != 0) { 3572 3573 con_log(CL_ANN, (KERN_WARNING 3574 "megaraid mbox: did not register with CMM\n")); 3575 3576 kfree(adapter->uscb_list); 3577 } 3578 3579 return rval; 3580 } 3581 3582 3583 /** 3584 * megaraid_cmm_unregister - un-register with the management module 3585 * @adapter : HBA soft state 3586 * 3587 * Un-register with the management module. 3588 * FIXME: mgmt module must return failure for unregister if it has pending 3589 * commands in LLD. 3590 */ 3591 static int 3592 megaraid_cmm_unregister(adapter_t *adapter) 3593 { 3594 kfree(adapter->uscb_list); 3595 mraid_mm_unregister_adp(adapter->unique_id); 3596 return 0; 3597 } 3598 3599 3600 /** 3601 * megaraid_mbox_mm_handler - interface for CMM to issue commands to LLD 3602 * @drvr_data : LLD specific data 3603 * @kioc : CMM interface packet 3604 * @action : command action 3605 * 3606 * This routine is invoked whenever the Common Management Module (CMM) has a 3607 * command for us. The 'action' parameter specifies if this is a new command 3608 * or otherwise. 3609 */ 3610 static int 3611 megaraid_mbox_mm_handler(unsigned long drvr_data, uioc_t *kioc, uint32_t action) 3612 { 3613 adapter_t *adapter; 3614 3615 if (action != IOCTL_ISSUE) { 3616 con_log(CL_ANN, (KERN_WARNING 3617 "megaraid: unsupported management action:%#2x\n", 3618 action)); 3619 return (-ENOTSUPP); 3620 } 3621 3622 adapter = (adapter_t *)drvr_data; 3623 3624 // make sure this adapter is not being detached right now. 3625 if (atomic_read(&adapter->being_detached)) { 3626 con_log(CL_ANN, (KERN_WARNING 3627 "megaraid: reject management request, detaching\n")); 3628 return (-ENODEV); 3629 } 3630 3631 switch (kioc->opcode) { 3632 3633 case GET_ADAP_INFO: 3634 3635 kioc->status = gather_hbainfo(adapter, (mraid_hba_info_t *) 3636 (unsigned long)kioc->buf_vaddr); 3637 3638 kioc->done(kioc); 3639 3640 return kioc->status; 3641 3642 case MBOX_CMD: 3643 3644 return megaraid_mbox_mm_command(adapter, kioc); 3645 3646 default: 3647 kioc->status = (-EINVAL); 3648 kioc->done(kioc); 3649 return (-EINVAL); 3650 } 3651 3652 return 0; // not reached 3653 } 3654 3655 /** 3656 * megaraid_mbox_mm_command - issues commands routed through CMM 3657 * @adapter : HBA soft state 3658 * @kioc : management command packet 3659 * 3660 * Issues commands, which are routed through the management module. 3661 */ 3662 static int 3663 megaraid_mbox_mm_command(adapter_t *adapter, uioc_t *kioc) 3664 { 3665 struct list_head *head = &adapter->uscb_pool; 3666 mbox64_t *mbox64; 3667 uint8_t *raw_mbox; 3668 scb_t *scb; 3669 mbox_ccb_t *ccb; 3670 unsigned long flags; 3671 3672 // detach one scb from free pool 3673 spin_lock_irqsave(USER_FREE_LIST_LOCK(adapter), flags); 3674 3675 if (list_empty(head)) { // should never happen because of CMM 3676 3677 con_log(CL_ANN, (KERN_WARNING 3678 "megaraid mbox: bug in cmm handler, lost resources\n")); 3679 3680 spin_unlock_irqrestore(USER_FREE_LIST_LOCK(adapter), flags); 3681 3682 return (-EINVAL); 3683 } 3684 3685 scb = list_entry(head->next, scb_t, list); 3686 list_del_init(&scb->list); 3687 3688 spin_unlock_irqrestore(USER_FREE_LIST_LOCK(adapter), flags); 3689 3690 scb->state = SCB_ACTIVE; 3691 scb->dma_type = MRAID_DMA_NONE; 3692 scb->dma_direction = PCI_DMA_NONE; 3693 3694 ccb = (mbox_ccb_t *)scb->ccb; 3695 mbox64 = (mbox64_t *)(unsigned long)kioc->cmdbuf; 3696 raw_mbox = (uint8_t *)&mbox64->mbox32; 3697 3698 memcpy(ccb->mbox64, mbox64, sizeof(mbox64_t)); 3699 3700 scb->gp = (unsigned long)kioc; 3701 3702 /* 3703 * If it is a logdrv random delete operation, we have to wait till 3704 * there are no outstanding cmds at the fw and then issue it directly 3705 */ 3706 if (raw_mbox[0] == FC_DEL_LOGDRV && raw_mbox[2] == OP_DEL_LOGDRV) { 3707 3708 if (wait_till_fw_empty(adapter)) { 3709 con_log(CL_ANN, (KERN_NOTICE 3710 "megaraid mbox: LD delete, timed out\n")); 3711 3712 kioc->status = -ETIME; 3713 3714 scb->status = -1; 3715 3716 megaraid_mbox_mm_done(adapter, scb); 3717 3718 return (-ETIME); 3719 } 3720 3721 INIT_LIST_HEAD(&scb->list); 3722 3723 scb->state = SCB_ISSUED; 3724 if (mbox_post_cmd(adapter, scb) != 0) { 3725 3726 con_log(CL_ANN, (KERN_NOTICE 3727 "megaraid mbox: LD delete, mailbox busy\n")); 3728 3729 kioc->status = -EBUSY; 3730 3731 scb->status = -1; 3732 3733 megaraid_mbox_mm_done(adapter, scb); 3734 3735 return (-EBUSY); 3736 } 3737 3738 return 0; 3739 } 3740 3741 // put the command on the pending list and execute 3742 megaraid_mbox_runpendq(adapter, scb); 3743 3744 return 0; 3745 } 3746 3747 3748 static int 3749 wait_till_fw_empty(adapter_t *adapter) 3750 { 3751 unsigned long flags = 0; 3752 int i; 3753 3754 3755 /* 3756 * Set the quiescent flag to stop issuing cmds to FW. 3757 */ 3758 spin_lock_irqsave(&adapter->lock, flags); 3759 adapter->quiescent++; 3760 spin_unlock_irqrestore(&adapter->lock, flags); 3761 3762 /* 3763 * Wait till there are no more cmds outstanding at FW. Try for at most 3764 * 60 seconds 3765 */ 3766 for (i = 0; i < 60 && adapter->outstanding_cmds; i++) { 3767 con_log(CL_DLEVEL1, (KERN_INFO 3768 "megaraid: FW has %d pending commands\n", 3769 adapter->outstanding_cmds)); 3770 3771 msleep(1000); 3772 } 3773 3774 return adapter->outstanding_cmds; 3775 } 3776 3777 3778 /** 3779 * megaraid_mbox_mm_done - callback for CMM commands 3780 * @adapter : HBA soft state 3781 * @scb : completed command 3782 * 3783 * Callback routine for internal commands originated from the management 3784 * module. 3785 */ 3786 static void 3787 megaraid_mbox_mm_done(adapter_t *adapter, scb_t *scb) 3788 { 3789 uioc_t *kioc; 3790 mbox64_t *mbox64; 3791 uint8_t *raw_mbox; 3792 unsigned long flags; 3793 3794 kioc = (uioc_t *)scb->gp; 3795 mbox64 = (mbox64_t *)(unsigned long)kioc->cmdbuf; 3796 mbox64->mbox32.status = scb->status; 3797 raw_mbox = (uint8_t *)&mbox64->mbox32; 3798 3799 3800 // put scb in the free pool 3801 scb->state = SCB_FREE; 3802 scb->scp = NULL; 3803 3804 spin_lock_irqsave(USER_FREE_LIST_LOCK(adapter), flags); 3805 3806 list_add(&scb->list, &adapter->uscb_pool); 3807 3808 spin_unlock_irqrestore(USER_FREE_LIST_LOCK(adapter), flags); 3809 3810 // if a delete logical drive operation succeeded, restart the 3811 // controller 3812 if (raw_mbox[0] == FC_DEL_LOGDRV && raw_mbox[2] == OP_DEL_LOGDRV) { 3813 3814 adapter->quiescent--; 3815 3816 megaraid_mbox_runpendq(adapter, NULL); 3817 } 3818 3819 kioc->done(kioc); 3820 3821 return; 3822 } 3823 3824 3825 /** 3826 * gather_hbainfo - HBA characteristics for the applications 3827 * @adapter : HBA soft state 3828 * @hinfo : pointer to the caller's host info strucuture 3829 */ 3830 static int 3831 gather_hbainfo(adapter_t *adapter, mraid_hba_info_t *hinfo) 3832 { 3833 uint8_t dmajor; 3834 3835 dmajor = megaraid_mbox_version[0]; 3836 3837 hinfo->pci_vendor_id = adapter->pdev->vendor; 3838 hinfo->pci_device_id = adapter->pdev->device; 3839 hinfo->subsys_vendor_id = adapter->pdev->subsystem_vendor; 3840 hinfo->subsys_device_id = adapter->pdev->subsystem_device; 3841 3842 hinfo->pci_bus = adapter->pdev->bus->number; 3843 hinfo->pci_dev_fn = adapter->pdev->devfn; 3844 hinfo->pci_slot = PCI_SLOT(adapter->pdev->devfn); 3845 hinfo->irq = adapter->host->irq; 3846 hinfo->baseport = ADAP2RAIDDEV(adapter)->baseport; 3847 3848 hinfo->unique_id = (hinfo->pci_bus << 8) | adapter->pdev->devfn; 3849 hinfo->host_no = adapter->host->host_no; 3850 3851 return 0; 3852 } 3853 3854 /* 3855 * END: Interface for the common management module 3856 */ 3857 3858 3859 3860 /** 3861 * megaraid_sysfs_alloc_resources - allocate sysfs related resources 3862 * @adapter : controller's soft state 3863 * 3864 * Allocate packets required to issue FW calls whenever the sysfs attributes 3865 * are read. These attributes would require up-to-date information from the 3866 * FW. Also set up resources for mutual exclusion to share these resources and 3867 * the wait queue. 3868 * 3869 * Return 0 on success. 3870 * Return -ERROR_CODE on failure. 3871 */ 3872 static int 3873 megaraid_sysfs_alloc_resources(adapter_t *adapter) 3874 { 3875 mraid_device_t *raid_dev = ADAP2RAIDDEV(adapter); 3876 int rval = 0; 3877 3878 raid_dev->sysfs_uioc = kmalloc(sizeof(uioc_t), GFP_KERNEL); 3879 3880 raid_dev->sysfs_mbox64 = kmalloc(sizeof(mbox64_t), GFP_KERNEL); 3881 3882 raid_dev->sysfs_buffer = pci_alloc_consistent(adapter->pdev, 3883 PAGE_SIZE, &raid_dev->sysfs_buffer_dma); 3884 3885 if (!raid_dev->sysfs_uioc || !raid_dev->sysfs_mbox64 || 3886 !raid_dev->sysfs_buffer) { 3887 3888 con_log(CL_ANN, (KERN_WARNING 3889 "megaraid: out of memory, %s %d\n", __func__, 3890 __LINE__)); 3891 3892 rval = -ENOMEM; 3893 3894 megaraid_sysfs_free_resources(adapter); 3895 } 3896 3897 mutex_init(&raid_dev->sysfs_mtx); 3898 3899 init_waitqueue_head(&raid_dev->sysfs_wait_q); 3900 3901 return rval; 3902 } 3903 3904 3905 /** 3906 * megaraid_sysfs_free_resources - free sysfs related resources 3907 * @adapter : controller's soft state 3908 * 3909 * Free packets allocated for sysfs FW commands 3910 */ 3911 static void 3912 megaraid_sysfs_free_resources(adapter_t *adapter) 3913 { 3914 mraid_device_t *raid_dev = ADAP2RAIDDEV(adapter); 3915 3916 kfree(raid_dev->sysfs_uioc); 3917 kfree(raid_dev->sysfs_mbox64); 3918 3919 if (raid_dev->sysfs_buffer) { 3920 pci_free_consistent(adapter->pdev, PAGE_SIZE, 3921 raid_dev->sysfs_buffer, raid_dev->sysfs_buffer_dma); 3922 } 3923 } 3924 3925 3926 /** 3927 * megaraid_sysfs_get_ldmap_done - callback for get ldmap 3928 * @uioc : completed packet 3929 * 3930 * Callback routine called in the ISR/tasklet context for get ldmap call 3931 */ 3932 static void 3933 megaraid_sysfs_get_ldmap_done(uioc_t *uioc) 3934 { 3935 adapter_t *adapter = (adapter_t *)uioc->buf_vaddr; 3936 mraid_device_t *raid_dev = ADAP2RAIDDEV(adapter); 3937 3938 uioc->status = 0; 3939 3940 wake_up(&raid_dev->sysfs_wait_q); 3941 } 3942 3943 3944 /** 3945 * megaraid_sysfs_get_ldmap_timeout - timeout handling for get ldmap 3946 * @data : timed out packet 3947 * 3948 * Timeout routine to recover and return to application, in case the adapter 3949 * has stopped responding. A timeout of 60 seconds for this command seems like 3950 * a good value. 3951 */ 3952 static void 3953 megaraid_sysfs_get_ldmap_timeout(unsigned long data) 3954 { 3955 uioc_t *uioc = (uioc_t *)data; 3956 adapter_t *adapter = (adapter_t *)uioc->buf_vaddr; 3957 mraid_device_t *raid_dev = ADAP2RAIDDEV(adapter); 3958 3959 uioc->status = -ETIME; 3960 3961 wake_up(&raid_dev->sysfs_wait_q); 3962 } 3963 3964 3965 /** 3966 * megaraid_sysfs_get_ldmap - get update logical drive map 3967 * @adapter : controller's soft state 3968 * 3969 * This routine will be called whenever user reads the logical drive 3970 * attributes, go get the current logical drive mapping table from the 3971 * firmware. We use the management API's to issue commands to the controller. 3972 * 3973 * NOTE: The commands issuance functionality is not generalized and 3974 * implemented in context of "get ld map" command only. If required, the 3975 * command issuance logical can be trivially pulled out and implemented as a 3976 * standalone libary. For now, this should suffice since there is no other 3977 * user of this interface. 3978 * 3979 * Return 0 on success. 3980 * Return -1 on failure. 3981 */ 3982 static int 3983 megaraid_sysfs_get_ldmap(adapter_t *adapter) 3984 { 3985 mraid_device_t *raid_dev = ADAP2RAIDDEV(adapter); 3986 uioc_t *uioc; 3987 mbox64_t *mbox64; 3988 mbox_t *mbox; 3989 char *raw_mbox; 3990 struct timer_list sysfs_timer; 3991 struct timer_list *timerp; 3992 caddr_t ldmap; 3993 int rval = 0; 3994 3995 /* 3996 * Allow only one read at a time to go through the sysfs attributes 3997 */ 3998 mutex_lock(&raid_dev->sysfs_mtx); 3999 4000 uioc = raid_dev->sysfs_uioc; 4001 mbox64 = raid_dev->sysfs_mbox64; 4002 ldmap = raid_dev->sysfs_buffer; 4003 4004 memset(uioc, 0, sizeof(uioc_t)); 4005 memset(mbox64, 0, sizeof(mbox64_t)); 4006 memset(ldmap, 0, sizeof(raid_dev->curr_ldmap)); 4007 4008 mbox = &mbox64->mbox32; 4009 raw_mbox = (char *)mbox; 4010 uioc->cmdbuf = (uint64_t)(unsigned long)mbox64; 4011 uioc->buf_vaddr = (caddr_t)adapter; 4012 uioc->status = -ENODATA; 4013 uioc->done = megaraid_sysfs_get_ldmap_done; 4014 4015 /* 4016 * Prepare the mailbox packet to get the current logical drive mapping 4017 * table 4018 */ 4019 mbox->xferaddr = (uint32_t)raid_dev->sysfs_buffer_dma; 4020 4021 raw_mbox[0] = FC_DEL_LOGDRV; 4022 raw_mbox[2] = OP_GET_LDID_MAP; 4023 4024 /* 4025 * Setup a timer to recover from a non-responding controller 4026 */ 4027 timerp = &sysfs_timer; 4028 init_timer(timerp); 4029 4030 timerp->function = megaraid_sysfs_get_ldmap_timeout; 4031 timerp->data = (unsigned long)uioc; 4032 timerp->expires = jiffies + 60 * HZ; 4033 4034 add_timer(timerp); 4035 4036 /* 4037 * Send the command to the firmware 4038 */ 4039 rval = megaraid_mbox_mm_command(adapter, uioc); 4040 4041 if (rval == 0) { // command successfully issued 4042 wait_event(raid_dev->sysfs_wait_q, (uioc->status != -ENODATA)); 4043 4044 /* 4045 * Check if the command timed out 4046 */ 4047 if (uioc->status == -ETIME) { 4048 con_log(CL_ANN, (KERN_NOTICE 4049 "megaraid: sysfs get ld map timed out\n")); 4050 4051 rval = -ETIME; 4052 } 4053 else { 4054 rval = mbox->status; 4055 } 4056 4057 if (rval == 0) { 4058 memcpy(raid_dev->curr_ldmap, ldmap, 4059 sizeof(raid_dev->curr_ldmap)); 4060 } 4061 else { 4062 con_log(CL_ANN, (KERN_NOTICE 4063 "megaraid: get ld map failed with %x\n", rval)); 4064 } 4065 } 4066 else { 4067 con_log(CL_ANN, (KERN_NOTICE 4068 "megaraid: could not issue ldmap command:%x\n", rval)); 4069 } 4070 4071 4072 del_timer_sync(timerp); 4073 4074 mutex_unlock(&raid_dev->sysfs_mtx); 4075 4076 return rval; 4077 } 4078 4079 4080 /** 4081 * megaraid_sysfs_show_app_hndl - display application handle for this adapter 4082 * @cdev : class device object representation for the host 4083 * @buf : buffer to send data to 4084 * 4085 * Display the handle used by the applications while executing management 4086 * tasks on the adapter. We invoke a management module API to get the adapter 4087 * handle, since we do not interface with applications directly. 4088 */ 4089 static ssize_t 4090 megaraid_sysfs_show_app_hndl(struct device *dev, struct device_attribute *attr, 4091 char *buf) 4092 { 4093 struct Scsi_Host *shost = class_to_shost(dev); 4094 adapter_t *adapter = (adapter_t *)SCSIHOST2ADAP(shost); 4095 uint32_t app_hndl; 4096 4097 app_hndl = mraid_mm_adapter_app_handle(adapter->unique_id); 4098 4099 return snprintf(buf, 8, "%u\n", app_hndl); 4100 } 4101 4102 4103 /** 4104 * megaraid_sysfs_show_ldnum - display the logical drive number for this device 4105 * @dev : device object representation for the scsi device 4106 * @attr : device attribute to show 4107 * @buf : buffer to send data to 4108 * 4109 * Display the logical drive number for the device in question, if it a valid 4110 * logical drive. For physical devices, "-1" is returned. 4111 * 4112 * The logical drive number is displayed in following format: 4113 * 4114 * <SCSI ID> <LD NUM> <LD STICKY ID> <APP ADAPTER HANDLE> 4115 * 4116 * <int> <int> <int> <int> 4117 */ 4118 static ssize_t 4119 megaraid_sysfs_show_ldnum(struct device *dev, struct device_attribute *attr, char *buf) 4120 { 4121 struct scsi_device *sdev = to_scsi_device(dev); 4122 adapter_t *adapter = (adapter_t *)SCSIHOST2ADAP(sdev->host); 4123 mraid_device_t *raid_dev = ADAP2RAIDDEV(adapter); 4124 int scsi_id = -1; 4125 int logical_drv = -1; 4126 int ldid_map = -1; 4127 uint32_t app_hndl = 0; 4128 int mapped_sdev_id; 4129 int rval; 4130 int i; 4131 4132 if (raid_dev->random_del_supported && 4133 MRAID_IS_LOGICAL_SDEV(adapter, sdev)) { 4134 4135 rval = megaraid_sysfs_get_ldmap(adapter); 4136 if (rval == 0) { 4137 4138 for (i = 0; i < MAX_LOGICAL_DRIVES_40LD; i++) { 4139 4140 mapped_sdev_id = sdev->id; 4141 4142 if (sdev->id > adapter->init_id) { 4143 mapped_sdev_id -= 1; 4144 } 4145 4146 if (raid_dev->curr_ldmap[i] == mapped_sdev_id) { 4147 4148 scsi_id = sdev->id; 4149 4150 logical_drv = i; 4151 4152 ldid_map = raid_dev->curr_ldmap[i]; 4153 4154 app_hndl = mraid_mm_adapter_app_handle( 4155 adapter->unique_id); 4156 4157 break; 4158 } 4159 } 4160 } 4161 else { 4162 con_log(CL_ANN, (KERN_NOTICE 4163 "megaraid: sysfs get ld map failed: %x\n", 4164 rval)); 4165 } 4166 } 4167 4168 return snprintf(buf, 36, "%d %d %d %d\n", scsi_id, logical_drv, 4169 ldid_map, app_hndl); 4170 } 4171 4172 4173 /* 4174 * END: Mailbox Low Level Driver 4175 */ 4176 module_init(megaraid_init); 4177 module_exit(megaraid_exit); 4178 4179 /* vim: set ts=8 sw=8 tw=78 ai si: */ 4180