1 /* 2 * 3 * Linux MegaRAID device driver 4 * 5 * Copyright (c) 2003-2004 LSI Logic Corporation. 6 * 7 * This program is free software; you can redistribute it and/or 8 * modify it under the terms of the GNU General Public License 9 * as published by the Free Software Foundation; either version 10 * 2 of the License, or (at your option) any later version. 11 * 12 * FILE : megaraid_mbox.c 13 * Version : v2.20.5.1 (Nov 16 2006) 14 * 15 * Authors: 16 * Atul Mukker <Atul.Mukker@lsi.com> 17 * Sreenivas Bagalkote <Sreenivas.Bagalkote@lsi.com> 18 * Manoj Jose <Manoj.Jose@lsi.com> 19 * Seokmann Ju 20 * 21 * List of supported controllers 22 * 23 * OEM Product Name VID DID SSVID SSID 24 * --- ------------ --- --- ---- ---- 25 * Dell PERC3/QC 101E 1960 1028 0471 26 * Dell PERC3/DC 101E 1960 1028 0493 27 * Dell PERC3/SC 101E 1960 1028 0475 28 * Dell PERC3/Di 1028 1960 1028 0123 29 * Dell PERC4/SC 1000 1960 1028 0520 30 * Dell PERC4/DC 1000 1960 1028 0518 31 * Dell PERC4/QC 1000 0407 1028 0531 32 * Dell PERC4/Di 1028 000F 1028 014A 33 * Dell PERC 4e/Si 1028 0013 1028 016c 34 * Dell PERC 4e/Di 1028 0013 1028 016d 35 * Dell PERC 4e/Di 1028 0013 1028 016e 36 * Dell PERC 4e/Di 1028 0013 1028 016f 37 * Dell PERC 4e/Di 1028 0013 1028 0170 38 * Dell PERC 4e/DC 1000 0408 1028 0002 39 * Dell PERC 4e/SC 1000 0408 1028 0001 40 * 41 * 42 * LSI MegaRAID SCSI 320-0 1000 1960 1000 A520 43 * LSI MegaRAID SCSI 320-1 1000 1960 1000 0520 44 * LSI MegaRAID SCSI 320-2 1000 1960 1000 0518 45 * LSI MegaRAID SCSI 320-0X 1000 0407 1000 0530 46 * LSI MegaRAID SCSI 320-2X 1000 0407 1000 0532 47 * LSI MegaRAID SCSI 320-4X 1000 0407 1000 0531 48 * LSI MegaRAID SCSI 320-1E 1000 0408 1000 0001 49 * LSI MegaRAID SCSI 320-2E 1000 0408 1000 0002 50 * LSI MegaRAID SATA 150-4 1000 1960 1000 4523 51 * LSI MegaRAID SATA 150-6 1000 1960 1000 0523 52 * LSI MegaRAID SATA 300-4X 1000 0409 1000 3004 53 * LSI MegaRAID SATA 300-8X 1000 0409 1000 3008 54 * 55 * INTEL RAID Controller SRCU42X 1000 0407 8086 0532 56 * INTEL RAID Controller SRCS16 1000 1960 8086 0523 57 * INTEL RAID Controller SRCU42E 1000 0408 8086 0002 58 * INTEL RAID Controller SRCZCRX 1000 0407 8086 0530 59 * INTEL RAID Controller SRCS28X 1000 0409 8086 3008 60 * INTEL RAID Controller SROMBU42E 1000 0408 8086 3431 61 * INTEL RAID Controller SROMBU42E 1000 0408 8086 3499 62 * INTEL RAID Controller SRCU51L 1000 1960 8086 0520 63 * 64 * FSC MegaRAID PCI Express ROMB 1000 0408 1734 1065 65 * 66 * ACER MegaRAID ROMB-2E 1000 0408 1025 004D 67 * 68 * NEC MegaRAID PCI Express ROMB 1000 0408 1033 8287 69 * 70 * For history of changes, see Documentation/ChangeLog.megaraid 71 */ 72 73 #include "megaraid_mbox.h" 74 75 static int megaraid_init(void); 76 static void megaraid_exit(void); 77 78 static int megaraid_probe_one(struct pci_dev*, const struct pci_device_id *); 79 static void megaraid_detach_one(struct pci_dev *); 80 static void megaraid_mbox_shutdown(struct pci_dev *); 81 82 static int megaraid_io_attach(adapter_t *); 83 static void megaraid_io_detach(adapter_t *); 84 85 static int megaraid_init_mbox(adapter_t *); 86 static void megaraid_fini_mbox(adapter_t *); 87 88 static int megaraid_alloc_cmd_packets(adapter_t *); 89 static void megaraid_free_cmd_packets(adapter_t *); 90 91 static int megaraid_mbox_setup_dma_pools(adapter_t *); 92 static void megaraid_mbox_teardown_dma_pools(adapter_t *); 93 94 static int megaraid_sysfs_alloc_resources(adapter_t *); 95 static void megaraid_sysfs_free_resources(adapter_t *); 96 97 static int megaraid_abort_handler(struct scsi_cmnd *); 98 static int megaraid_reset_handler(struct scsi_cmnd *); 99 100 static int mbox_post_sync_cmd(adapter_t *, uint8_t []); 101 static int mbox_post_sync_cmd_fast(adapter_t *, uint8_t []); 102 static int megaraid_busywait_mbox(mraid_device_t *); 103 static int megaraid_mbox_product_info(adapter_t *); 104 static int megaraid_mbox_extended_cdb(adapter_t *); 105 static int megaraid_mbox_support_ha(adapter_t *, uint16_t *); 106 static int megaraid_mbox_support_random_del(adapter_t *); 107 static int megaraid_mbox_get_max_sg(adapter_t *); 108 static void megaraid_mbox_enum_raid_scsi(adapter_t *); 109 static void megaraid_mbox_flush_cache(adapter_t *); 110 static int megaraid_mbox_fire_sync_cmd(adapter_t *); 111 112 static void megaraid_mbox_display_scb(adapter_t *, scb_t *); 113 static void megaraid_mbox_setup_device_map(adapter_t *); 114 115 static int megaraid_queue_command(struct scsi_cmnd *, 116 void (*)(struct scsi_cmnd *)); 117 static scb_t *megaraid_mbox_build_cmd(adapter_t *, struct scsi_cmnd *, int *); 118 static void megaraid_mbox_runpendq(adapter_t *, scb_t *); 119 static void megaraid_mbox_prepare_pthru(adapter_t *, scb_t *, 120 struct scsi_cmnd *); 121 static void megaraid_mbox_prepare_epthru(adapter_t *, scb_t *, 122 struct scsi_cmnd *); 123 124 static irqreturn_t megaraid_isr(int, void *); 125 126 static void megaraid_mbox_dpc(unsigned long); 127 128 static ssize_t megaraid_sysfs_show_app_hndl(struct device *, struct device_attribute *attr, char *); 129 static ssize_t megaraid_sysfs_show_ldnum(struct device *, struct device_attribute *attr, char *); 130 131 static int megaraid_cmm_register(adapter_t *); 132 static int megaraid_cmm_unregister(adapter_t *); 133 static int megaraid_mbox_mm_handler(unsigned long, uioc_t *, uint32_t); 134 static int megaraid_mbox_mm_command(adapter_t *, uioc_t *); 135 static void megaraid_mbox_mm_done(adapter_t *, scb_t *); 136 static int gather_hbainfo(adapter_t *, mraid_hba_info_t *); 137 static int wait_till_fw_empty(adapter_t *); 138 139 140 141 MODULE_AUTHOR("megaraidlinux@lsi.com"); 142 MODULE_DESCRIPTION("LSI Logic MegaRAID Mailbox Driver"); 143 MODULE_LICENSE("GPL"); 144 MODULE_VERSION(MEGARAID_VERSION); 145 146 /* 147 * ### modules parameters for driver ### 148 */ 149 150 /* 151 * Set to enable driver to expose unconfigured disk to kernel 152 */ 153 static int megaraid_expose_unconf_disks = 0; 154 module_param_named(unconf_disks, megaraid_expose_unconf_disks, int, 0); 155 MODULE_PARM_DESC(unconf_disks, 156 "Set to expose unconfigured disks to kernel (default=0)"); 157 158 /* 159 * driver wait time if the adapter's mailbox is busy 160 */ 161 static unsigned int max_mbox_busy_wait = MBOX_BUSY_WAIT; 162 module_param_named(busy_wait, max_mbox_busy_wait, int, 0); 163 MODULE_PARM_DESC(busy_wait, 164 "Max wait for mailbox in microseconds if busy (default=10)"); 165 166 /* 167 * number of sectors per IO command 168 */ 169 static unsigned int megaraid_max_sectors = MBOX_MAX_SECTORS; 170 module_param_named(max_sectors, megaraid_max_sectors, int, 0); 171 MODULE_PARM_DESC(max_sectors, 172 "Maximum number of sectors per IO command (default=128)"); 173 174 /* 175 * number of commands per logical unit 176 */ 177 static unsigned int megaraid_cmd_per_lun = MBOX_DEF_CMD_PER_LUN; 178 module_param_named(cmd_per_lun, megaraid_cmd_per_lun, int, 0); 179 MODULE_PARM_DESC(cmd_per_lun, 180 "Maximum number of commands per logical unit (default=64)"); 181 182 183 /* 184 * Fast driver load option, skip scanning for physical devices during load. 185 * This would result in non-disk devices being skipped during driver load 186 * time. These can be later added though, using /proc/scsi/scsi 187 */ 188 static unsigned int megaraid_fast_load = 0; 189 module_param_named(fast_load, megaraid_fast_load, int, 0); 190 MODULE_PARM_DESC(fast_load, 191 "Faster loading of the driver, skips physical devices! (default=0)"); 192 193 194 /* 195 * mraid_debug level - threshold for amount of information to be displayed by 196 * the driver. This level can be changed through modules parameters, ioctl or 197 * sysfs/proc interface. By default, print the announcement messages only. 198 */ 199 int mraid_debug_level = CL_ANN; 200 module_param_named(debug_level, mraid_debug_level, int, 0); 201 MODULE_PARM_DESC(debug_level, "Debug level for driver (default=0)"); 202 203 /* 204 * ### global data ### 205 */ 206 static uint8_t megaraid_mbox_version[8] = 207 { 0x02, 0x20, 0x04, 0x06, 3, 7, 20, 5 }; 208 209 210 /* 211 * PCI table for all supported controllers. 212 */ 213 static struct pci_device_id pci_id_table_g[] = { 214 { 215 PCI_VENDOR_ID_DELL, 216 PCI_DEVICE_ID_PERC4_DI_DISCOVERY, 217 PCI_VENDOR_ID_DELL, 218 PCI_SUBSYS_ID_PERC4_DI_DISCOVERY, 219 }, 220 { 221 PCI_VENDOR_ID_LSI_LOGIC, 222 PCI_DEVICE_ID_PERC4_SC, 223 PCI_VENDOR_ID_DELL, 224 PCI_SUBSYS_ID_PERC4_SC, 225 }, 226 { 227 PCI_VENDOR_ID_LSI_LOGIC, 228 PCI_DEVICE_ID_PERC4_DC, 229 PCI_VENDOR_ID_DELL, 230 PCI_SUBSYS_ID_PERC4_DC, 231 }, 232 { 233 PCI_VENDOR_ID_LSI_LOGIC, 234 PCI_DEVICE_ID_VERDE, 235 PCI_ANY_ID, 236 PCI_ANY_ID, 237 }, 238 { 239 PCI_VENDOR_ID_DELL, 240 PCI_DEVICE_ID_PERC4_DI_EVERGLADES, 241 PCI_VENDOR_ID_DELL, 242 PCI_SUBSYS_ID_PERC4_DI_EVERGLADES, 243 }, 244 { 245 PCI_VENDOR_ID_DELL, 246 PCI_DEVICE_ID_PERC4E_SI_BIGBEND, 247 PCI_VENDOR_ID_DELL, 248 PCI_SUBSYS_ID_PERC4E_SI_BIGBEND, 249 }, 250 { 251 PCI_VENDOR_ID_DELL, 252 PCI_DEVICE_ID_PERC4E_DI_KOBUK, 253 PCI_VENDOR_ID_DELL, 254 PCI_SUBSYS_ID_PERC4E_DI_KOBUK, 255 }, 256 { 257 PCI_VENDOR_ID_DELL, 258 PCI_DEVICE_ID_PERC4E_DI_CORVETTE, 259 PCI_VENDOR_ID_DELL, 260 PCI_SUBSYS_ID_PERC4E_DI_CORVETTE, 261 }, 262 { 263 PCI_VENDOR_ID_DELL, 264 PCI_DEVICE_ID_PERC4E_DI_EXPEDITION, 265 PCI_VENDOR_ID_DELL, 266 PCI_SUBSYS_ID_PERC4E_DI_EXPEDITION, 267 }, 268 { 269 PCI_VENDOR_ID_DELL, 270 PCI_DEVICE_ID_PERC4E_DI_GUADALUPE, 271 PCI_VENDOR_ID_DELL, 272 PCI_SUBSYS_ID_PERC4E_DI_GUADALUPE, 273 }, 274 { 275 PCI_VENDOR_ID_LSI_LOGIC, 276 PCI_DEVICE_ID_DOBSON, 277 PCI_ANY_ID, 278 PCI_ANY_ID, 279 }, 280 { 281 PCI_VENDOR_ID_AMI, 282 PCI_DEVICE_ID_AMI_MEGARAID3, 283 PCI_ANY_ID, 284 PCI_ANY_ID, 285 }, 286 { 287 PCI_VENDOR_ID_LSI_LOGIC, 288 PCI_DEVICE_ID_AMI_MEGARAID3, 289 PCI_ANY_ID, 290 PCI_ANY_ID, 291 }, 292 { 293 PCI_VENDOR_ID_LSI_LOGIC, 294 PCI_DEVICE_ID_LINDSAY, 295 PCI_ANY_ID, 296 PCI_ANY_ID, 297 }, 298 {0} /* Terminating entry */ 299 }; 300 MODULE_DEVICE_TABLE(pci, pci_id_table_g); 301 302 303 static struct pci_driver megaraid_pci_driver = { 304 .name = "megaraid", 305 .id_table = pci_id_table_g, 306 .probe = megaraid_probe_one, 307 .remove = __devexit_p(megaraid_detach_one), 308 .shutdown = megaraid_mbox_shutdown, 309 }; 310 311 312 313 // definitions for the device attributes for exporting logical drive number 314 // for a scsi address (Host, Channel, Id, Lun) 315 316 DEVICE_ATTR(megaraid_mbox_app_hndl, S_IRUSR, megaraid_sysfs_show_app_hndl, 317 NULL); 318 319 // Host template initializer for megaraid mbox sysfs device attributes 320 static struct device_attribute *megaraid_shost_attrs[] = { 321 &dev_attr_megaraid_mbox_app_hndl, 322 NULL, 323 }; 324 325 326 DEVICE_ATTR(megaraid_mbox_ld, S_IRUSR, megaraid_sysfs_show_ldnum, NULL); 327 328 // Host template initializer for megaraid mbox sysfs device attributes 329 static struct device_attribute *megaraid_sdev_attrs[] = { 330 &dev_attr_megaraid_mbox_ld, 331 NULL, 332 }; 333 334 /** 335 * megaraid_change_queue_depth - Change the device's queue depth 336 * @sdev: scsi device struct 337 * @qdepth: depth to set 338 * 339 * Return value: 340 * actual depth set 341 */ 342 static int megaraid_change_queue_depth(struct scsi_device *sdev, int qdepth) 343 { 344 if (qdepth > MBOX_MAX_SCSI_CMDS) 345 qdepth = MBOX_MAX_SCSI_CMDS; 346 scsi_adjust_queue_depth(sdev, 0, qdepth); 347 return sdev->queue_depth; 348 } 349 350 /* 351 * Scsi host template for megaraid unified driver 352 */ 353 static struct scsi_host_template megaraid_template_g = { 354 .module = THIS_MODULE, 355 .name = "LSI Logic MegaRAID driver", 356 .proc_name = "megaraid", 357 .queuecommand = megaraid_queue_command, 358 .eh_abort_handler = megaraid_abort_handler, 359 .eh_device_reset_handler = megaraid_reset_handler, 360 .eh_bus_reset_handler = megaraid_reset_handler, 361 .eh_host_reset_handler = megaraid_reset_handler, 362 .change_queue_depth = megaraid_change_queue_depth, 363 .use_clustering = ENABLE_CLUSTERING, 364 .sdev_attrs = megaraid_sdev_attrs, 365 .shost_attrs = megaraid_shost_attrs, 366 }; 367 368 369 /** 370 * megaraid_init - module load hook 371 * 372 * We register ourselves as hotplug enabled module and let PCI subsystem 373 * discover our adapters. 374 */ 375 static int __init 376 megaraid_init(void) 377 { 378 int rval; 379 380 // Announce the driver version 381 con_log(CL_ANN, (KERN_INFO "megaraid: %s %s\n", MEGARAID_VERSION, 382 MEGARAID_EXT_VERSION)); 383 384 // check validity of module parameters 385 if (megaraid_cmd_per_lun > MBOX_MAX_SCSI_CMDS) { 386 387 con_log(CL_ANN, (KERN_WARNING 388 "megaraid mailbox: max commands per lun reset to %d\n", 389 MBOX_MAX_SCSI_CMDS)); 390 391 megaraid_cmd_per_lun = MBOX_MAX_SCSI_CMDS; 392 } 393 394 395 // register as a PCI hot-plug driver module 396 rval = pci_register_driver(&megaraid_pci_driver); 397 if (rval < 0) { 398 con_log(CL_ANN, (KERN_WARNING 399 "megaraid: could not register hotplug support.\n")); 400 } 401 402 return rval; 403 } 404 405 406 /** 407 * megaraid_exit - driver unload entry point 408 * 409 * We simply unwrap the megaraid_init routine here. 410 */ 411 static void __exit 412 megaraid_exit(void) 413 { 414 con_log(CL_DLEVEL1, (KERN_NOTICE "megaraid: unloading framework\n")); 415 416 // unregister as PCI hotplug driver 417 pci_unregister_driver(&megaraid_pci_driver); 418 419 return; 420 } 421 422 423 /** 424 * megaraid_probe_one - PCI hotplug entry point 425 * @pdev : handle to this controller's PCI configuration space 426 * @id : pci device id of the class of controllers 427 * 428 * This routine should be called whenever a new adapter is detected by the 429 * PCI hotplug susbsystem. 430 */ 431 static int __devinit 432 megaraid_probe_one(struct pci_dev *pdev, const struct pci_device_id *id) 433 { 434 adapter_t *adapter; 435 436 437 // detected a new controller 438 con_log(CL_ANN, (KERN_INFO 439 "megaraid: probe new device %#4.04x:%#4.04x:%#4.04x:%#4.04x: ", 440 pdev->vendor, pdev->device, pdev->subsystem_vendor, 441 pdev->subsystem_device)); 442 443 con_log(CL_ANN, ("bus %d:slot %d:func %d\n", pdev->bus->number, 444 PCI_SLOT(pdev->devfn), PCI_FUNC(pdev->devfn))); 445 446 if (pci_enable_device(pdev)) { 447 con_log(CL_ANN, (KERN_WARNING 448 "megaraid: pci_enable_device failed\n")); 449 450 return -ENODEV; 451 } 452 453 // Enable bus-mastering on this controller 454 pci_set_master(pdev); 455 456 // Allocate the per driver initialization structure 457 adapter = kzalloc(sizeof(adapter_t), GFP_KERNEL); 458 459 if (adapter == NULL) { 460 con_log(CL_ANN, (KERN_WARNING 461 "megaraid: out of memory, %s %d.\n", __FUNCTION__, __LINE__)); 462 463 goto out_probe_one; 464 } 465 466 467 // set up PCI related soft state and other pre-known parameters 468 adapter->unique_id = pdev->bus->number << 8 | pdev->devfn; 469 adapter->irq = pdev->irq; 470 adapter->pdev = pdev; 471 472 atomic_set(&adapter->being_detached, 0); 473 474 // Setup the default DMA mask. This would be changed later on 475 // depending on hardware capabilities 476 if (pci_set_dma_mask(adapter->pdev, DMA_32BIT_MASK) != 0) { 477 478 con_log(CL_ANN, (KERN_WARNING 479 "megaraid: pci_set_dma_mask failed:%d\n", __LINE__)); 480 481 goto out_free_adapter; 482 } 483 484 485 // Initialize the synchronization lock for kernel and LLD 486 spin_lock_init(&adapter->lock); 487 488 // Initialize the command queues: the list of free SCBs and the list 489 // of pending SCBs. 490 INIT_LIST_HEAD(&adapter->kscb_pool); 491 spin_lock_init(SCSI_FREE_LIST_LOCK(adapter)); 492 493 INIT_LIST_HEAD(&adapter->pend_list); 494 spin_lock_init(PENDING_LIST_LOCK(adapter)); 495 496 INIT_LIST_HEAD(&adapter->completed_list); 497 spin_lock_init(COMPLETED_LIST_LOCK(adapter)); 498 499 500 // Start the mailbox based controller 501 if (megaraid_init_mbox(adapter) != 0) { 502 con_log(CL_ANN, (KERN_WARNING 503 "megaraid: maibox adapter did not initialize\n")); 504 505 goto out_free_adapter; 506 } 507 508 // Register with LSI Common Management Module 509 if (megaraid_cmm_register(adapter) != 0) { 510 511 con_log(CL_ANN, (KERN_WARNING 512 "megaraid: could not register with management module\n")); 513 514 goto out_fini_mbox; 515 } 516 517 // setup adapter handle in PCI soft state 518 pci_set_drvdata(pdev, adapter); 519 520 // attach with scsi mid-layer 521 if (megaraid_io_attach(adapter) != 0) { 522 523 con_log(CL_ANN, (KERN_WARNING "megaraid: io attach failed\n")); 524 525 goto out_cmm_unreg; 526 } 527 528 return 0; 529 530 out_cmm_unreg: 531 pci_set_drvdata(pdev, NULL); 532 megaraid_cmm_unregister(adapter); 533 out_fini_mbox: 534 megaraid_fini_mbox(adapter); 535 out_free_adapter: 536 kfree(adapter); 537 out_probe_one: 538 pci_disable_device(pdev); 539 540 return -ENODEV; 541 } 542 543 544 /** 545 * megaraid_detach_one - release framework resources and call LLD release routine 546 * @pdev : handle for our PCI cofiguration space 547 * 548 * This routine is called during driver unload. We free all the allocated 549 * resources and call the corresponding LLD so that it can also release all 550 * its resources. 551 * 552 * This routine is also called from the PCI hotplug system. 553 */ 554 static void 555 megaraid_detach_one(struct pci_dev *pdev) 556 { 557 adapter_t *adapter; 558 struct Scsi_Host *host; 559 560 561 // Start a rollback on this adapter 562 adapter = pci_get_drvdata(pdev); 563 564 if (!adapter) { 565 con_log(CL_ANN, (KERN_CRIT 566 "megaraid: Invalid detach on %#4.04x:%#4.04x:%#4.04x:%#4.04x\n", 567 pdev->vendor, pdev->device, pdev->subsystem_vendor, 568 pdev->subsystem_device)); 569 570 return; 571 } 572 else { 573 con_log(CL_ANN, (KERN_NOTICE 574 "megaraid: detaching device %#4.04x:%#4.04x:%#4.04x:%#4.04x\n", 575 pdev->vendor, pdev->device, pdev->subsystem_vendor, 576 pdev->subsystem_device)); 577 } 578 579 580 host = adapter->host; 581 582 // do not allow any more requests from the management module for this 583 // adapter. 584 // FIXME: How do we account for the request which might still be 585 // pending with us? 586 atomic_set(&adapter->being_detached, 1); 587 588 // detach from the IO sub-system 589 megaraid_io_detach(adapter); 590 591 // reset the device state in the PCI structure. We check this 592 // condition when we enter here. If the device state is NULL, 593 // that would mean the device has already been removed 594 pci_set_drvdata(pdev, NULL); 595 596 // Unregister from common management module 597 // 598 // FIXME: this must return success or failure for conditions if there 599 // is a command pending with LLD or not. 600 megaraid_cmm_unregister(adapter); 601 602 // finalize the mailbox based controller and release all resources 603 megaraid_fini_mbox(adapter); 604 605 kfree(adapter); 606 607 scsi_host_put(host); 608 609 pci_disable_device(pdev); 610 611 return; 612 } 613 614 615 /** 616 * megaraid_mbox_shutdown - PCI shutdown for megaraid HBA 617 * @pdev : generic driver model device 618 * 619 * Shutdown notification, perform flush cache. 620 */ 621 static void 622 megaraid_mbox_shutdown(struct pci_dev *pdev) 623 { 624 adapter_t *adapter = pci_get_drvdata(pdev); 625 static int counter; 626 627 if (!adapter) { 628 con_log(CL_ANN, (KERN_WARNING 629 "megaraid: null device in shutdown\n")); 630 return; 631 } 632 633 // flush caches now 634 con_log(CL_ANN, (KERN_INFO "megaraid: flushing adapter %d...", 635 counter++)); 636 637 megaraid_mbox_flush_cache(adapter); 638 639 con_log(CL_ANN, ("done\n")); 640 } 641 642 643 /** 644 * megaraid_io_attach - attach a device with the IO subsystem 645 * @adapter : controller's soft state 646 * 647 * Attach this device with the IO subsystem. 648 */ 649 static int 650 megaraid_io_attach(adapter_t *adapter) 651 { 652 struct Scsi_Host *host; 653 654 // Initialize SCSI Host structure 655 host = scsi_host_alloc(&megaraid_template_g, 8); 656 if (!host) { 657 con_log(CL_ANN, (KERN_WARNING 658 "megaraid mbox: scsi_register failed\n")); 659 660 return -1; 661 } 662 663 SCSIHOST2ADAP(host) = (caddr_t)adapter; 664 adapter->host = host; 665 666 host->irq = adapter->irq; 667 host->unique_id = adapter->unique_id; 668 host->can_queue = adapter->max_cmds; 669 host->this_id = adapter->init_id; 670 host->sg_tablesize = adapter->sglen; 671 host->max_sectors = adapter->max_sectors; 672 host->cmd_per_lun = adapter->cmd_per_lun; 673 host->max_channel = adapter->max_channel; 674 host->max_id = adapter->max_target; 675 host->max_lun = adapter->max_lun; 676 677 678 // notify mid-layer about the new controller 679 if (scsi_add_host(host, &adapter->pdev->dev)) { 680 681 con_log(CL_ANN, (KERN_WARNING 682 "megaraid mbox: scsi_add_host failed\n")); 683 684 scsi_host_put(host); 685 686 return -1; 687 } 688 689 scsi_scan_host(host); 690 691 return 0; 692 } 693 694 695 /** 696 * megaraid_io_detach - detach a device from the IO subsystem 697 * @adapter : controller's soft state 698 * 699 * Detach this device from the IO subsystem. 700 */ 701 static void 702 megaraid_io_detach(adapter_t *adapter) 703 { 704 struct Scsi_Host *host; 705 706 con_log(CL_DLEVEL1, (KERN_INFO "megaraid: io detach\n")); 707 708 host = adapter->host; 709 710 scsi_remove_host(host); 711 712 return; 713 } 714 715 716 /* 717 * START: Mailbox Low Level Driver 718 * 719 * This is section specific to the single mailbox based controllers 720 */ 721 722 /** 723 * megaraid_init_mbox - initialize controller 724 * @adapter : our soft state 725 * 726 * - Allocate 16-byte aligned mailbox memory for firmware handshake 727 * - Allocate controller's memory resources 728 * - Find out all initialization data 729 * - Allocate memory required for all the commands 730 * - Use internal library of FW routines, build up complete soft state 731 */ 732 static int __devinit 733 megaraid_init_mbox(adapter_t *adapter) 734 { 735 struct pci_dev *pdev; 736 mraid_device_t *raid_dev; 737 int i; 738 uint32_t magic64; 739 740 741 adapter->ito = MBOX_TIMEOUT; 742 pdev = adapter->pdev; 743 744 /* 745 * Allocate and initialize the init data structure for mailbox 746 * controllers 747 */ 748 raid_dev = kzalloc(sizeof(mraid_device_t), GFP_KERNEL); 749 if (raid_dev == NULL) return -1; 750 751 752 /* 753 * Attach the adapter soft state to raid device soft state 754 */ 755 adapter->raid_device = (caddr_t)raid_dev; 756 raid_dev->fast_load = megaraid_fast_load; 757 758 759 // our baseport 760 raid_dev->baseport = pci_resource_start(pdev, 0); 761 762 if (pci_request_regions(pdev, "MegaRAID: LSI Logic Corporation") != 0) { 763 764 con_log(CL_ANN, (KERN_WARNING 765 "megaraid: mem region busy\n")); 766 767 goto out_free_raid_dev; 768 } 769 770 raid_dev->baseaddr = ioremap_nocache(raid_dev->baseport, 128); 771 772 if (!raid_dev->baseaddr) { 773 774 con_log(CL_ANN, (KERN_WARNING 775 "megaraid: could not map hba memory\n") ); 776 777 goto out_release_regions; 778 } 779 780 /* initialize the mutual exclusion lock for the mailbox */ 781 spin_lock_init(&raid_dev->mailbox_lock); 782 783 /* allocate memory required for commands */ 784 if (megaraid_alloc_cmd_packets(adapter) != 0) 785 goto out_iounmap; 786 787 /* 788 * Issue SYNC cmd to flush the pending cmds in the adapter 789 * and initialize its internal state 790 */ 791 792 if (megaraid_mbox_fire_sync_cmd(adapter)) 793 con_log(CL_ANN, ("megaraid: sync cmd failed\n")); 794 795 /* 796 * Setup the rest of the soft state using the library of 797 * FW routines 798 */ 799 800 /* request IRQ and register the interrupt service routine */ 801 if (request_irq(adapter->irq, megaraid_isr, IRQF_SHARED, "megaraid", 802 adapter)) { 803 804 con_log(CL_ANN, (KERN_WARNING 805 "megaraid: Couldn't register IRQ %d!\n", adapter->irq)); 806 goto out_alloc_cmds; 807 808 } 809 810 // Product info 811 if (megaraid_mbox_product_info(adapter) != 0) 812 goto out_free_irq; 813 814 // Do we support extended CDBs 815 adapter->max_cdb_sz = 10; 816 if (megaraid_mbox_extended_cdb(adapter) == 0) { 817 adapter->max_cdb_sz = 16; 818 } 819 820 /* 821 * Do we support cluster environment, if we do, what is the initiator 822 * id. 823 * NOTE: In a non-cluster aware firmware environment, the LLD should 824 * return 7 as initiator id. 825 */ 826 adapter->ha = 0; 827 adapter->init_id = -1; 828 if (megaraid_mbox_support_ha(adapter, &adapter->init_id) == 0) { 829 adapter->ha = 1; 830 } 831 832 /* 833 * Prepare the device ids array to have the mapping between the kernel 834 * device address and megaraid device address. 835 * We export the physical devices on their actual addresses. The 836 * logical drives are exported on a virtual SCSI channel 837 */ 838 megaraid_mbox_setup_device_map(adapter); 839 840 // If the firmware supports random deletion, update the device id map 841 if (megaraid_mbox_support_random_del(adapter)) { 842 843 // Change the logical drives numbers in device_ids array one 844 // slot in device_ids is reserved for target id, that's why 845 // "<=" below 846 for (i = 0; i <= MAX_LOGICAL_DRIVES_40LD; i++) { 847 adapter->device_ids[adapter->max_channel][i] += 0x80; 848 } 849 adapter->device_ids[adapter->max_channel][adapter->init_id] = 850 0xFF; 851 852 raid_dev->random_del_supported = 1; 853 } 854 855 /* 856 * find out the maximum number of scatter-gather elements supported by 857 * this firmware 858 */ 859 adapter->sglen = megaraid_mbox_get_max_sg(adapter); 860 861 // enumerate RAID and SCSI channels so that all devices on SCSI 862 // channels can later be exported, including disk devices 863 megaraid_mbox_enum_raid_scsi(adapter); 864 865 /* 866 * Other parameters required by upper layer 867 * 868 * maximum number of sectors per IO command 869 */ 870 adapter->max_sectors = megaraid_max_sectors; 871 872 /* 873 * number of queued commands per LUN. 874 */ 875 adapter->cmd_per_lun = megaraid_cmd_per_lun; 876 877 /* 878 * Allocate resources required to issue FW calls, when sysfs is 879 * accessed 880 */ 881 if (megaraid_sysfs_alloc_resources(adapter) != 0) 882 goto out_free_irq; 883 884 // Set the DMA mask to 64-bit. All supported controllers as capable of 885 // DMA in this range 886 pci_read_config_dword(adapter->pdev, PCI_CONF_AMISIG64, &magic64); 887 888 if (((magic64 == HBA_SIGNATURE_64_BIT) && 889 ((adapter->pdev->subsystem_device != 890 PCI_SUBSYS_ID_MEGARAID_SATA_150_6) && 891 (adapter->pdev->subsystem_device != 892 PCI_SUBSYS_ID_MEGARAID_SATA_150_4))) || 893 (adapter->pdev->vendor == PCI_VENDOR_ID_LSI_LOGIC && 894 adapter->pdev->device == PCI_DEVICE_ID_VERDE) || 895 (adapter->pdev->vendor == PCI_VENDOR_ID_LSI_LOGIC && 896 adapter->pdev->device == PCI_DEVICE_ID_DOBSON) || 897 (adapter->pdev->vendor == PCI_VENDOR_ID_LSI_LOGIC && 898 adapter->pdev->device == PCI_DEVICE_ID_LINDSAY) || 899 (adapter->pdev->vendor == PCI_VENDOR_ID_DELL && 900 adapter->pdev->device == PCI_DEVICE_ID_PERC4_DI_EVERGLADES) || 901 (adapter->pdev->vendor == PCI_VENDOR_ID_DELL && 902 adapter->pdev->device == PCI_DEVICE_ID_PERC4E_DI_KOBUK)) { 903 if (pci_set_dma_mask(adapter->pdev, DMA_64BIT_MASK)) { 904 con_log(CL_ANN, (KERN_WARNING 905 "megaraid: DMA mask for 64-bit failed\n")); 906 907 if (pci_set_dma_mask (adapter->pdev, DMA_32BIT_MASK)) { 908 con_log(CL_ANN, (KERN_WARNING 909 "megaraid: 32-bit DMA mask failed\n")); 910 goto out_free_sysfs_res; 911 } 912 } 913 } 914 915 // setup tasklet for DPC 916 tasklet_init(&adapter->dpc_h, megaraid_mbox_dpc, 917 (unsigned long)adapter); 918 919 con_log(CL_DLEVEL1, (KERN_INFO 920 "megaraid mbox hba successfully initialized\n")); 921 922 return 0; 923 924 out_free_sysfs_res: 925 megaraid_sysfs_free_resources(adapter); 926 out_free_irq: 927 free_irq(adapter->irq, adapter); 928 out_alloc_cmds: 929 megaraid_free_cmd_packets(adapter); 930 out_iounmap: 931 iounmap(raid_dev->baseaddr); 932 out_release_regions: 933 pci_release_regions(pdev); 934 out_free_raid_dev: 935 kfree(raid_dev); 936 937 return -1; 938 } 939 940 941 /** 942 * megaraid_fini_mbox - undo controller initialization 943 * @adapter : our soft state 944 */ 945 static void 946 megaraid_fini_mbox(adapter_t *adapter) 947 { 948 mraid_device_t *raid_dev = ADAP2RAIDDEV(adapter); 949 950 // flush all caches 951 megaraid_mbox_flush_cache(adapter); 952 953 tasklet_kill(&adapter->dpc_h); 954 955 megaraid_sysfs_free_resources(adapter); 956 957 megaraid_free_cmd_packets(adapter); 958 959 free_irq(adapter->irq, adapter); 960 961 iounmap(raid_dev->baseaddr); 962 963 pci_release_regions(adapter->pdev); 964 965 kfree(raid_dev); 966 967 return; 968 } 969 970 971 /** 972 * megaraid_alloc_cmd_packets - allocate shared mailbox 973 * @adapter : soft state of the raid controller 974 * 975 * Allocate and align the shared mailbox. This maibox is used to issue 976 * all the commands. For IO based controllers, the mailbox is also regsitered 977 * with the FW. Allocate memory for all commands as well. 978 * This is our big allocator. 979 */ 980 static int 981 megaraid_alloc_cmd_packets(adapter_t *adapter) 982 { 983 mraid_device_t *raid_dev = ADAP2RAIDDEV(adapter); 984 struct pci_dev *pdev; 985 unsigned long align; 986 scb_t *scb; 987 mbox_ccb_t *ccb; 988 struct mraid_pci_blk *epthru_pci_blk; 989 struct mraid_pci_blk *sg_pci_blk; 990 struct mraid_pci_blk *mbox_pci_blk; 991 int i; 992 993 pdev = adapter->pdev; 994 995 /* 996 * Setup the mailbox 997 * Allocate the common 16-byte aligned memory for the handshake 998 * mailbox. 999 */ 1000 raid_dev->una_mbox64 = pci_alloc_consistent(adapter->pdev, 1001 sizeof(mbox64_t), &raid_dev->una_mbox64_dma); 1002 1003 if (!raid_dev->una_mbox64) { 1004 con_log(CL_ANN, (KERN_WARNING 1005 "megaraid: out of memory, %s %d\n", __FUNCTION__, 1006 __LINE__)); 1007 return -1; 1008 } 1009 memset(raid_dev->una_mbox64, 0, sizeof(mbox64_t)); 1010 1011 /* 1012 * Align the mailbox at 16-byte boundary 1013 */ 1014 raid_dev->mbox = &raid_dev->una_mbox64->mbox32; 1015 1016 raid_dev->mbox = (mbox_t *)((((unsigned long)raid_dev->mbox) + 15) & 1017 (~0UL ^ 0xFUL)); 1018 1019 raid_dev->mbox64 = (mbox64_t *)(((unsigned long)raid_dev->mbox) - 8); 1020 1021 align = ((void *)raid_dev->mbox - 1022 ((void *)&raid_dev->una_mbox64->mbox32)); 1023 1024 raid_dev->mbox_dma = (unsigned long)raid_dev->una_mbox64_dma + 8 + 1025 align; 1026 1027 // Allocate memory for commands issued internally 1028 adapter->ibuf = pci_alloc_consistent(pdev, MBOX_IBUF_SIZE, 1029 &adapter->ibuf_dma_h); 1030 if (!adapter->ibuf) { 1031 1032 con_log(CL_ANN, (KERN_WARNING 1033 "megaraid: out of memory, %s %d\n", __FUNCTION__, 1034 __LINE__)); 1035 1036 goto out_free_common_mbox; 1037 } 1038 memset(adapter->ibuf, 0, MBOX_IBUF_SIZE); 1039 1040 // Allocate memory for our SCSI Command Blocks and their associated 1041 // memory 1042 1043 /* 1044 * Allocate memory for the base list of scb. Later allocate memory for 1045 * CCBs and embedded components of each CCB and point the pointers in 1046 * scb to the allocated components 1047 * NOTE: The code to allocate SCB will be duplicated in all the LLD 1048 * since the calling routine does not yet know the number of available 1049 * commands. 1050 */ 1051 adapter->kscb_list = kcalloc(MBOX_MAX_SCSI_CMDS, sizeof(scb_t), GFP_KERNEL); 1052 1053 if (adapter->kscb_list == NULL) { 1054 con_log(CL_ANN, (KERN_WARNING 1055 "megaraid: out of memory, %s %d\n", __FUNCTION__, 1056 __LINE__)); 1057 goto out_free_ibuf; 1058 } 1059 1060 // memory allocation for our command packets 1061 if (megaraid_mbox_setup_dma_pools(adapter) != 0) { 1062 con_log(CL_ANN, (KERN_WARNING 1063 "megaraid: out of memory, %s %d\n", __FUNCTION__, 1064 __LINE__)); 1065 goto out_free_scb_list; 1066 } 1067 1068 // Adjust the scb pointers and link in the free pool 1069 epthru_pci_blk = raid_dev->epthru_pool; 1070 sg_pci_blk = raid_dev->sg_pool; 1071 mbox_pci_blk = raid_dev->mbox_pool; 1072 1073 for (i = 0; i < MBOX_MAX_SCSI_CMDS; i++) { 1074 scb = adapter->kscb_list + i; 1075 ccb = raid_dev->ccb_list + i; 1076 1077 ccb->mbox = (mbox_t *)(mbox_pci_blk[i].vaddr + 16); 1078 ccb->raw_mbox = (uint8_t *)ccb->mbox; 1079 ccb->mbox64 = (mbox64_t *)(mbox_pci_blk[i].vaddr + 8); 1080 ccb->mbox_dma_h = (unsigned long)mbox_pci_blk[i].dma_addr + 16; 1081 1082 // make sure the mailbox is aligned properly 1083 if (ccb->mbox_dma_h & 0x0F) { 1084 con_log(CL_ANN, (KERN_CRIT 1085 "megaraid mbox: not aligned on 16-bytes\n")); 1086 1087 goto out_teardown_dma_pools; 1088 } 1089 1090 ccb->epthru = (mraid_epassthru_t *) 1091 epthru_pci_blk[i].vaddr; 1092 ccb->epthru_dma_h = epthru_pci_blk[i].dma_addr; 1093 ccb->pthru = (mraid_passthru_t *)ccb->epthru; 1094 ccb->pthru_dma_h = ccb->epthru_dma_h; 1095 1096 1097 ccb->sgl64 = (mbox_sgl64 *)sg_pci_blk[i].vaddr; 1098 ccb->sgl_dma_h = sg_pci_blk[i].dma_addr; 1099 ccb->sgl32 = (mbox_sgl32 *)ccb->sgl64; 1100 1101 scb->ccb = (caddr_t)ccb; 1102 scb->gp = 0; 1103 1104 scb->sno = i; // command index 1105 1106 scb->scp = NULL; 1107 scb->state = SCB_FREE; 1108 scb->dma_direction = PCI_DMA_NONE; 1109 scb->dma_type = MRAID_DMA_NONE; 1110 scb->dev_channel = -1; 1111 scb->dev_target = -1; 1112 1113 // put scb in the free pool 1114 list_add_tail(&scb->list, &adapter->kscb_pool); 1115 } 1116 1117 return 0; 1118 1119 out_teardown_dma_pools: 1120 megaraid_mbox_teardown_dma_pools(adapter); 1121 out_free_scb_list: 1122 kfree(adapter->kscb_list); 1123 out_free_ibuf: 1124 pci_free_consistent(pdev, MBOX_IBUF_SIZE, (void *)adapter->ibuf, 1125 adapter->ibuf_dma_h); 1126 out_free_common_mbox: 1127 pci_free_consistent(adapter->pdev, sizeof(mbox64_t), 1128 (caddr_t)raid_dev->una_mbox64, raid_dev->una_mbox64_dma); 1129 1130 return -1; 1131 } 1132 1133 1134 /** 1135 * megaraid_free_cmd_packets - free memory 1136 * @adapter : soft state of the raid controller 1137 * 1138 * Release memory resources allocated for commands. 1139 */ 1140 static void 1141 megaraid_free_cmd_packets(adapter_t *adapter) 1142 { 1143 mraid_device_t *raid_dev = ADAP2RAIDDEV(adapter); 1144 1145 megaraid_mbox_teardown_dma_pools(adapter); 1146 1147 kfree(adapter->kscb_list); 1148 1149 pci_free_consistent(adapter->pdev, MBOX_IBUF_SIZE, 1150 (void *)adapter->ibuf, adapter->ibuf_dma_h); 1151 1152 pci_free_consistent(adapter->pdev, sizeof(mbox64_t), 1153 (caddr_t)raid_dev->una_mbox64, raid_dev->una_mbox64_dma); 1154 return; 1155 } 1156 1157 1158 /** 1159 * megaraid_mbox_setup_dma_pools - setup dma pool for command packets 1160 * @adapter : HBA soft state 1161 * 1162 * Setup the dma pools for mailbox, passthru and extended passthru structures, 1163 * and scatter-gather lists. 1164 */ 1165 static int 1166 megaraid_mbox_setup_dma_pools(adapter_t *adapter) 1167 { 1168 mraid_device_t *raid_dev = ADAP2RAIDDEV(adapter); 1169 struct mraid_pci_blk *epthru_pci_blk; 1170 struct mraid_pci_blk *sg_pci_blk; 1171 struct mraid_pci_blk *mbox_pci_blk; 1172 int i; 1173 1174 1175 1176 // Allocate memory for 16-bytes aligned mailboxes 1177 raid_dev->mbox_pool_handle = pci_pool_create("megaraid mbox pool", 1178 adapter->pdev, 1179 sizeof(mbox64_t) + 16, 1180 16, 0); 1181 1182 if (raid_dev->mbox_pool_handle == NULL) { 1183 goto fail_setup_dma_pool; 1184 } 1185 1186 mbox_pci_blk = raid_dev->mbox_pool; 1187 for (i = 0; i < MBOX_MAX_SCSI_CMDS; i++) { 1188 mbox_pci_blk[i].vaddr = pci_pool_alloc( 1189 raid_dev->mbox_pool_handle, 1190 GFP_KERNEL, 1191 &mbox_pci_blk[i].dma_addr); 1192 if (!mbox_pci_blk[i].vaddr) { 1193 goto fail_setup_dma_pool; 1194 } 1195 } 1196 1197 /* 1198 * Allocate memory for each embedded passthru strucuture pointer 1199 * Request for a 128 bytes aligned structure for each passthru command 1200 * structure 1201 * Since passthru and extended passthru commands are exclusive, they 1202 * share common memory pool. Passthru structures piggyback on memory 1203 * allocted to extended passthru since passthru is smaller of the two 1204 */ 1205 raid_dev->epthru_pool_handle = pci_pool_create("megaraid mbox pthru", 1206 adapter->pdev, sizeof(mraid_epassthru_t), 128, 0); 1207 1208 if (raid_dev->epthru_pool_handle == NULL) { 1209 goto fail_setup_dma_pool; 1210 } 1211 1212 epthru_pci_blk = raid_dev->epthru_pool; 1213 for (i = 0; i < MBOX_MAX_SCSI_CMDS; i++) { 1214 epthru_pci_blk[i].vaddr = pci_pool_alloc( 1215 raid_dev->epthru_pool_handle, 1216 GFP_KERNEL, 1217 &epthru_pci_blk[i].dma_addr); 1218 if (!epthru_pci_blk[i].vaddr) { 1219 goto fail_setup_dma_pool; 1220 } 1221 } 1222 1223 1224 // Allocate memory for each scatter-gather list. Request for 512 bytes 1225 // alignment for each sg list 1226 raid_dev->sg_pool_handle = pci_pool_create("megaraid mbox sg", 1227 adapter->pdev, 1228 sizeof(mbox_sgl64) * MBOX_MAX_SG_SIZE, 1229 512, 0); 1230 1231 if (raid_dev->sg_pool_handle == NULL) { 1232 goto fail_setup_dma_pool; 1233 } 1234 1235 sg_pci_blk = raid_dev->sg_pool; 1236 for (i = 0; i < MBOX_MAX_SCSI_CMDS; i++) { 1237 sg_pci_blk[i].vaddr = pci_pool_alloc( 1238 raid_dev->sg_pool_handle, 1239 GFP_KERNEL, 1240 &sg_pci_blk[i].dma_addr); 1241 if (!sg_pci_blk[i].vaddr) { 1242 goto fail_setup_dma_pool; 1243 } 1244 } 1245 1246 return 0; 1247 1248 fail_setup_dma_pool: 1249 megaraid_mbox_teardown_dma_pools(adapter); 1250 return -1; 1251 } 1252 1253 1254 /** 1255 * megaraid_mbox_teardown_dma_pools - teardown dma pools for command packets 1256 * @adapter : HBA soft state 1257 * 1258 * Teardown the dma pool for mailbox, passthru and extended passthru 1259 * structures, and scatter-gather lists. 1260 */ 1261 static void 1262 megaraid_mbox_teardown_dma_pools(adapter_t *adapter) 1263 { 1264 mraid_device_t *raid_dev = ADAP2RAIDDEV(adapter); 1265 struct mraid_pci_blk *epthru_pci_blk; 1266 struct mraid_pci_blk *sg_pci_blk; 1267 struct mraid_pci_blk *mbox_pci_blk; 1268 int i; 1269 1270 1271 sg_pci_blk = raid_dev->sg_pool; 1272 for (i = 0; i < MBOX_MAX_SCSI_CMDS && sg_pci_blk[i].vaddr; i++) { 1273 pci_pool_free(raid_dev->sg_pool_handle, sg_pci_blk[i].vaddr, 1274 sg_pci_blk[i].dma_addr); 1275 } 1276 if (raid_dev->sg_pool_handle) 1277 pci_pool_destroy(raid_dev->sg_pool_handle); 1278 1279 1280 epthru_pci_blk = raid_dev->epthru_pool; 1281 for (i = 0; i < MBOX_MAX_SCSI_CMDS && epthru_pci_blk[i].vaddr; i++) { 1282 pci_pool_free(raid_dev->epthru_pool_handle, 1283 epthru_pci_blk[i].vaddr, epthru_pci_blk[i].dma_addr); 1284 } 1285 if (raid_dev->epthru_pool_handle) 1286 pci_pool_destroy(raid_dev->epthru_pool_handle); 1287 1288 1289 mbox_pci_blk = raid_dev->mbox_pool; 1290 for (i = 0; i < MBOX_MAX_SCSI_CMDS && mbox_pci_blk[i].vaddr; i++) { 1291 pci_pool_free(raid_dev->mbox_pool_handle, 1292 mbox_pci_blk[i].vaddr, mbox_pci_blk[i].dma_addr); 1293 } 1294 if (raid_dev->mbox_pool_handle) 1295 pci_pool_destroy(raid_dev->mbox_pool_handle); 1296 1297 return; 1298 } 1299 1300 1301 /** 1302 * megaraid_alloc_scb - detach and return a scb from the free list 1303 * @adapter : controller's soft state 1304 * @scp : pointer to the scsi command to be executed 1305 * 1306 * Return the scb from the head of the free list. %NULL if there are none 1307 * available. 1308 */ 1309 static scb_t * 1310 megaraid_alloc_scb(adapter_t *adapter, struct scsi_cmnd *scp) 1311 { 1312 struct list_head *head = &adapter->kscb_pool; 1313 scb_t *scb = NULL; 1314 unsigned long flags; 1315 1316 // detach scb from free pool 1317 spin_lock_irqsave(SCSI_FREE_LIST_LOCK(adapter), flags); 1318 1319 if (list_empty(head)) { 1320 spin_unlock_irqrestore(SCSI_FREE_LIST_LOCK(adapter), flags); 1321 return NULL; 1322 } 1323 1324 scb = list_entry(head->next, scb_t, list); 1325 list_del_init(&scb->list); 1326 1327 spin_unlock_irqrestore(SCSI_FREE_LIST_LOCK(adapter), flags); 1328 1329 scb->state = SCB_ACTIVE; 1330 scb->scp = scp; 1331 scb->dma_type = MRAID_DMA_NONE; 1332 1333 return scb; 1334 } 1335 1336 1337 /** 1338 * megaraid_dealloc_scb - return the scb to the free pool 1339 * @adapter : controller's soft state 1340 * @scb : scb to be freed 1341 * 1342 * Return the scb back to the free list of scbs. The caller must 'flush' the 1343 * SCB before calling us. E.g., performing pci_unamp and/or pci_sync etc. 1344 * NOTE NOTE: Make sure the scb is not on any list before calling this 1345 * routine. 1346 */ 1347 static inline void 1348 megaraid_dealloc_scb(adapter_t *adapter, scb_t *scb) 1349 { 1350 unsigned long flags; 1351 1352 // put scb in the free pool 1353 scb->state = SCB_FREE; 1354 scb->scp = NULL; 1355 spin_lock_irqsave(SCSI_FREE_LIST_LOCK(adapter), flags); 1356 1357 list_add(&scb->list, &adapter->kscb_pool); 1358 1359 spin_unlock_irqrestore(SCSI_FREE_LIST_LOCK(adapter), flags); 1360 1361 return; 1362 } 1363 1364 1365 /** 1366 * megaraid_mbox_mksgl - make the scatter-gather list 1367 * @adapter : controller's soft state 1368 * @scb : scsi control block 1369 * 1370 * Prepare the scatter-gather list. 1371 */ 1372 static int 1373 megaraid_mbox_mksgl(adapter_t *adapter, scb_t *scb) 1374 { 1375 struct scatterlist *sgl; 1376 mbox_ccb_t *ccb; 1377 struct scsi_cmnd *scp; 1378 int sgcnt; 1379 int i; 1380 1381 1382 scp = scb->scp; 1383 ccb = (mbox_ccb_t *)scb->ccb; 1384 1385 sgcnt = scsi_dma_map(scp); 1386 BUG_ON(sgcnt < 0 || sgcnt > adapter->sglen); 1387 1388 // no mapping required if no data to be transferred 1389 if (!sgcnt) 1390 return 0; 1391 1392 scb->dma_type = MRAID_DMA_WSG; 1393 1394 scsi_for_each_sg(scp, sgl, sgcnt, i) { 1395 ccb->sgl64[i].address = sg_dma_address(sgl); 1396 ccb->sgl64[i].length = sg_dma_len(sgl); 1397 } 1398 1399 // Return count of SG nodes 1400 return sgcnt; 1401 } 1402 1403 1404 /** 1405 * mbox_post_cmd - issue a mailbox command 1406 * @adapter : controller's soft state 1407 * @scb : command to be issued 1408 * 1409 * Post the command to the controller if mailbox is available. 1410 */ 1411 static int 1412 mbox_post_cmd(adapter_t *adapter, scb_t *scb) 1413 { 1414 mraid_device_t *raid_dev = ADAP2RAIDDEV(adapter); 1415 mbox64_t *mbox64; 1416 mbox_t *mbox; 1417 mbox_ccb_t *ccb; 1418 unsigned long flags; 1419 unsigned int i = 0; 1420 1421 1422 ccb = (mbox_ccb_t *)scb->ccb; 1423 mbox = raid_dev->mbox; 1424 mbox64 = raid_dev->mbox64; 1425 1426 /* 1427 * Check for busy mailbox. If it is, return failure - the caller 1428 * should retry later. 1429 */ 1430 spin_lock_irqsave(MAILBOX_LOCK(raid_dev), flags); 1431 1432 if (unlikely(mbox->busy)) { 1433 do { 1434 udelay(1); 1435 i++; 1436 rmb(); 1437 } while(mbox->busy && (i < max_mbox_busy_wait)); 1438 1439 if (mbox->busy) { 1440 1441 spin_unlock_irqrestore(MAILBOX_LOCK(raid_dev), flags); 1442 1443 return -1; 1444 } 1445 } 1446 1447 1448 // Copy this command's mailbox data into "adapter's" mailbox 1449 memcpy((caddr_t)mbox64, (caddr_t)ccb->mbox64, 22); 1450 mbox->cmdid = scb->sno; 1451 1452 adapter->outstanding_cmds++; 1453 1454 if (scb->dma_direction == PCI_DMA_TODEVICE) 1455 pci_dma_sync_sg_for_device(adapter->pdev, 1456 scsi_sglist(scb->scp), 1457 scsi_sg_count(scb->scp), 1458 PCI_DMA_TODEVICE); 1459 1460 mbox->busy = 1; // Set busy 1461 mbox->poll = 0; 1462 mbox->ack = 0; 1463 wmb(); 1464 1465 WRINDOOR(raid_dev, raid_dev->mbox_dma | 0x1); 1466 1467 spin_unlock_irqrestore(MAILBOX_LOCK(raid_dev), flags); 1468 1469 return 0; 1470 } 1471 1472 1473 /** 1474 * megaraid_queue_command - generic queue entry point for all LLDs 1475 * @scp : pointer to the scsi command to be executed 1476 * @done : callback routine to be called after the cmd has be completed 1477 * 1478 * Queue entry point for mailbox based controllers. 1479 */ 1480 static int 1481 megaraid_queue_command(struct scsi_cmnd *scp, void (*done)(struct scsi_cmnd *)) 1482 { 1483 adapter_t *adapter; 1484 scb_t *scb; 1485 int if_busy; 1486 1487 adapter = SCP2ADAPTER(scp); 1488 scp->scsi_done = done; 1489 scp->result = 0; 1490 1491 /* 1492 * Allocate and build a SCB request 1493 * if_busy flag will be set if megaraid_mbox_build_cmd() command could 1494 * not allocate scb. We will return non-zero status in that case. 1495 * NOTE: scb can be null even though certain commands completed 1496 * successfully, e.g., MODE_SENSE and TEST_UNIT_READY, it would 1497 * return 0 in that case, and we would do the callback right away. 1498 */ 1499 if_busy = 0; 1500 scb = megaraid_mbox_build_cmd(adapter, scp, &if_busy); 1501 if (!scb) { // command already completed 1502 done(scp); 1503 return 0; 1504 } 1505 1506 megaraid_mbox_runpendq(adapter, scb); 1507 return if_busy; 1508 } 1509 1510 /** 1511 * megaraid_mbox_build_cmd - transform the mid-layer scsi commands 1512 * @adapter : controller's soft state 1513 * @scp : mid-layer scsi command pointer 1514 * @busy : set if request could not be completed because of lack of 1515 * resources 1516 * 1517 * Transform the mid-layer scsi command to megaraid firmware lingua. 1518 * Convert the command issued by mid-layer to format understood by megaraid 1519 * firmware. We also complete certain commands without sending them to firmware. 1520 */ 1521 static scb_t * 1522 megaraid_mbox_build_cmd(adapter_t *adapter, struct scsi_cmnd *scp, int *busy) 1523 { 1524 mraid_device_t *rdev = ADAP2RAIDDEV(adapter); 1525 int channel; 1526 int target; 1527 int islogical; 1528 mbox_ccb_t *ccb; 1529 mraid_passthru_t *pthru; 1530 mbox64_t *mbox64; 1531 mbox_t *mbox; 1532 scb_t *scb; 1533 char skip[] = "skipping"; 1534 char scan[] = "scanning"; 1535 char *ss; 1536 1537 1538 /* 1539 * Get the appropriate device map for the device this command is 1540 * intended for 1541 */ 1542 MRAID_GET_DEVICE_MAP(adapter, scp, channel, target, islogical); 1543 1544 /* 1545 * Logical drive commands 1546 */ 1547 if (islogical) { 1548 switch (scp->cmnd[0]) { 1549 case TEST_UNIT_READY: 1550 /* 1551 * Do we support clustering and is the support enabled 1552 * If no, return success always 1553 */ 1554 if (!adapter->ha) { 1555 scp->result = (DID_OK << 16); 1556 return NULL; 1557 } 1558 1559 if (!(scb = megaraid_alloc_scb(adapter, scp))) { 1560 scp->result = (DID_ERROR << 16); 1561 *busy = 1; 1562 return NULL; 1563 } 1564 1565 scb->dma_direction = scp->sc_data_direction; 1566 scb->dev_channel = 0xFF; 1567 scb->dev_target = target; 1568 ccb = (mbox_ccb_t *)scb->ccb; 1569 1570 /* 1571 * The command id will be provided by the command 1572 * issuance routine 1573 */ 1574 ccb->raw_mbox[0] = CLUSTER_CMD; 1575 ccb->raw_mbox[2] = RESERVATION_STATUS; 1576 ccb->raw_mbox[3] = target; 1577 1578 return scb; 1579 1580 case MODE_SENSE: 1581 { 1582 struct scatterlist *sgl; 1583 caddr_t vaddr; 1584 1585 sgl = scsi_sglist(scp); 1586 if (sg_page(sgl)) { 1587 vaddr = (caddr_t) sg_virt(&sgl[0]); 1588 1589 memset(vaddr, 0, scp->cmnd[4]); 1590 } 1591 else { 1592 con_log(CL_ANN, (KERN_WARNING 1593 "megaraid mailbox: invalid sg:%d\n", 1594 __LINE__)); 1595 } 1596 } 1597 scp->result = (DID_OK << 16); 1598 return NULL; 1599 1600 case INQUIRY: 1601 /* 1602 * Display the channel scan for logical drives 1603 * Do not display scan for a channel if already done. 1604 */ 1605 if (!(rdev->last_disp & (1L << SCP2CHANNEL(scp)))) { 1606 1607 con_log(CL_ANN, (KERN_INFO 1608 "scsi[%d]: scanning scsi channel %d", 1609 adapter->host->host_no, 1610 SCP2CHANNEL(scp))); 1611 1612 con_log(CL_ANN, ( 1613 " [virtual] for logical drives\n")); 1614 1615 rdev->last_disp |= (1L << SCP2CHANNEL(scp)); 1616 } 1617 1618 if (scp->cmnd[1] & MEGA_SCSI_INQ_EVPD) { 1619 scp->sense_buffer[0] = 0x70; 1620 scp->sense_buffer[2] = ILLEGAL_REQUEST; 1621 scp->sense_buffer[12] = MEGA_INVALID_FIELD_IN_CDB; 1622 scp->result = CHECK_CONDITION << 1; 1623 return NULL; 1624 } 1625 1626 /* Fall through */ 1627 1628 case READ_CAPACITY: 1629 /* 1630 * Do not allow LUN > 0 for logical drives and 1631 * requests for more than 40 logical drives 1632 */ 1633 if (SCP2LUN(scp)) { 1634 scp->result = (DID_BAD_TARGET << 16); 1635 return NULL; 1636 } 1637 if ((target % 0x80) >= MAX_LOGICAL_DRIVES_40LD) { 1638 scp->result = (DID_BAD_TARGET << 16); 1639 return NULL; 1640 } 1641 1642 1643 /* Allocate a SCB and initialize passthru */ 1644 if (!(scb = megaraid_alloc_scb(adapter, scp))) { 1645 scp->result = (DID_ERROR << 16); 1646 *busy = 1; 1647 return NULL; 1648 } 1649 1650 ccb = (mbox_ccb_t *)scb->ccb; 1651 scb->dev_channel = 0xFF; 1652 scb->dev_target = target; 1653 pthru = ccb->pthru; 1654 mbox = ccb->mbox; 1655 mbox64 = ccb->mbox64; 1656 1657 pthru->timeout = 0; 1658 pthru->ars = 1; 1659 pthru->reqsenselen = 14; 1660 pthru->islogical = 1; 1661 pthru->logdrv = target; 1662 pthru->cdblen = scp->cmd_len; 1663 memcpy(pthru->cdb, scp->cmnd, scp->cmd_len); 1664 1665 mbox->cmd = MBOXCMD_PASSTHRU64; 1666 scb->dma_direction = scp->sc_data_direction; 1667 1668 pthru->dataxferlen = scsi_bufflen(scp); 1669 pthru->dataxferaddr = ccb->sgl_dma_h; 1670 pthru->numsge = megaraid_mbox_mksgl(adapter, 1671 scb); 1672 1673 mbox->xferaddr = 0xFFFFFFFF; 1674 mbox64->xferaddr_lo = (uint32_t )ccb->pthru_dma_h; 1675 mbox64->xferaddr_hi = 0; 1676 1677 return scb; 1678 1679 case READ_6: 1680 case WRITE_6: 1681 case READ_10: 1682 case WRITE_10: 1683 case READ_12: 1684 case WRITE_12: 1685 1686 /* 1687 * Allocate a SCB and initialize mailbox 1688 */ 1689 if (!(scb = megaraid_alloc_scb(adapter, scp))) { 1690 scp->result = (DID_ERROR << 16); 1691 *busy = 1; 1692 return NULL; 1693 } 1694 ccb = (mbox_ccb_t *)scb->ccb; 1695 scb->dev_channel = 0xFF; 1696 scb->dev_target = target; 1697 mbox = ccb->mbox; 1698 mbox64 = ccb->mbox64; 1699 mbox->logdrv = target; 1700 1701 /* 1702 * A little HACK: 2nd bit is zero for all scsi read 1703 * commands and is set for all scsi write commands 1704 */ 1705 mbox->cmd = (scp->cmnd[0] & 0x02) ? MBOXCMD_LWRITE64: 1706 MBOXCMD_LREAD64 ; 1707 1708 /* 1709 * 6-byte READ(0x08) or WRITE(0x0A) cdb 1710 */ 1711 if (scp->cmd_len == 6) { 1712 mbox->numsectors = (uint32_t)scp->cmnd[4]; 1713 mbox->lba = 1714 ((uint32_t)scp->cmnd[1] << 16) | 1715 ((uint32_t)scp->cmnd[2] << 8) | 1716 (uint32_t)scp->cmnd[3]; 1717 1718 mbox->lba &= 0x1FFFFF; 1719 } 1720 1721 /* 1722 * 10-byte READ(0x28) or WRITE(0x2A) cdb 1723 */ 1724 else if (scp->cmd_len == 10) { 1725 mbox->numsectors = 1726 (uint32_t)scp->cmnd[8] | 1727 ((uint32_t)scp->cmnd[7] << 8); 1728 mbox->lba = 1729 ((uint32_t)scp->cmnd[2] << 24) | 1730 ((uint32_t)scp->cmnd[3] << 16) | 1731 ((uint32_t)scp->cmnd[4] << 8) | 1732 (uint32_t)scp->cmnd[5]; 1733 } 1734 1735 /* 1736 * 12-byte READ(0xA8) or WRITE(0xAA) cdb 1737 */ 1738 else if (scp->cmd_len == 12) { 1739 mbox->lba = 1740 ((uint32_t)scp->cmnd[2] << 24) | 1741 ((uint32_t)scp->cmnd[3] << 16) | 1742 ((uint32_t)scp->cmnd[4] << 8) | 1743 (uint32_t)scp->cmnd[5]; 1744 1745 mbox->numsectors = 1746 ((uint32_t)scp->cmnd[6] << 24) | 1747 ((uint32_t)scp->cmnd[7] << 16) | 1748 ((uint32_t)scp->cmnd[8] << 8) | 1749 (uint32_t)scp->cmnd[9]; 1750 } 1751 else { 1752 con_log(CL_ANN, (KERN_WARNING 1753 "megaraid: unsupported CDB length\n")); 1754 1755 megaraid_dealloc_scb(adapter, scb); 1756 1757 scp->result = (DID_ERROR << 16); 1758 return NULL; 1759 } 1760 1761 scb->dma_direction = scp->sc_data_direction; 1762 1763 // Calculate Scatter-Gather info 1764 mbox64->xferaddr_lo = (uint32_t )ccb->sgl_dma_h; 1765 mbox->numsge = megaraid_mbox_mksgl(adapter, 1766 scb); 1767 mbox->xferaddr = 0xFFFFFFFF; 1768 mbox64->xferaddr_hi = 0; 1769 1770 return scb; 1771 1772 case RESERVE: 1773 case RELEASE: 1774 /* 1775 * Do we support clustering and is the support enabled 1776 */ 1777 if (!adapter->ha) { 1778 scp->result = (DID_BAD_TARGET << 16); 1779 return NULL; 1780 } 1781 1782 /* 1783 * Allocate a SCB and initialize mailbox 1784 */ 1785 if (!(scb = megaraid_alloc_scb(adapter, scp))) { 1786 scp->result = (DID_ERROR << 16); 1787 *busy = 1; 1788 return NULL; 1789 } 1790 1791 ccb = (mbox_ccb_t *)scb->ccb; 1792 scb->dev_channel = 0xFF; 1793 scb->dev_target = target; 1794 ccb->raw_mbox[0] = CLUSTER_CMD; 1795 ccb->raw_mbox[2] = (scp->cmnd[0] == RESERVE) ? 1796 RESERVE_LD : RELEASE_LD; 1797 1798 ccb->raw_mbox[3] = target; 1799 scb->dma_direction = scp->sc_data_direction; 1800 1801 return scb; 1802 1803 default: 1804 scp->result = (DID_BAD_TARGET << 16); 1805 return NULL; 1806 } 1807 } 1808 else { // Passthru device commands 1809 1810 // Do not allow access to target id > 15 or LUN > 7 1811 if (target > 15 || SCP2LUN(scp) > 7) { 1812 scp->result = (DID_BAD_TARGET << 16); 1813 return NULL; 1814 } 1815 1816 // if fast load option was set and scan for last device is 1817 // over, reset the fast_load flag so that during a possible 1818 // next scan, devices can be made available 1819 if (rdev->fast_load && (target == 15) && 1820 (SCP2CHANNEL(scp) == adapter->max_channel -1)) { 1821 1822 con_log(CL_ANN, (KERN_INFO 1823 "megaraid[%d]: physical device scan re-enabled\n", 1824 adapter->host->host_no)); 1825 rdev->fast_load = 0; 1826 } 1827 1828 /* 1829 * Display the channel scan for physical devices 1830 */ 1831 if (!(rdev->last_disp & (1L << SCP2CHANNEL(scp)))) { 1832 1833 ss = rdev->fast_load ? skip : scan; 1834 1835 con_log(CL_ANN, (KERN_INFO 1836 "scsi[%d]: %s scsi channel %d [Phy %d]", 1837 adapter->host->host_no, ss, SCP2CHANNEL(scp), 1838 channel)); 1839 1840 con_log(CL_ANN, ( 1841 " for non-raid devices\n")); 1842 1843 rdev->last_disp |= (1L << SCP2CHANNEL(scp)); 1844 } 1845 1846 // disable channel sweep if fast load option given 1847 if (rdev->fast_load) { 1848 scp->result = (DID_BAD_TARGET << 16); 1849 return NULL; 1850 } 1851 1852 // Allocate a SCB and initialize passthru 1853 if (!(scb = megaraid_alloc_scb(adapter, scp))) { 1854 scp->result = (DID_ERROR << 16); 1855 *busy = 1; 1856 return NULL; 1857 } 1858 1859 ccb = (mbox_ccb_t *)scb->ccb; 1860 scb->dev_channel = channel; 1861 scb->dev_target = target; 1862 scb->dma_direction = scp->sc_data_direction; 1863 mbox = ccb->mbox; 1864 mbox64 = ccb->mbox64; 1865 1866 // Does this firmware support extended CDBs 1867 if (adapter->max_cdb_sz == 16) { 1868 mbox->cmd = MBOXCMD_EXTPTHRU; 1869 1870 megaraid_mbox_prepare_epthru(adapter, scb, scp); 1871 1872 mbox64->xferaddr_lo = (uint32_t)ccb->epthru_dma_h; 1873 mbox64->xferaddr_hi = 0; 1874 mbox->xferaddr = 0xFFFFFFFF; 1875 } 1876 else { 1877 mbox->cmd = MBOXCMD_PASSTHRU64; 1878 1879 megaraid_mbox_prepare_pthru(adapter, scb, scp); 1880 1881 mbox64->xferaddr_lo = (uint32_t)ccb->pthru_dma_h; 1882 mbox64->xferaddr_hi = 0; 1883 mbox->xferaddr = 0xFFFFFFFF; 1884 } 1885 return scb; 1886 } 1887 1888 // NOT REACHED 1889 } 1890 1891 1892 /** 1893 * megaraid_mbox_runpendq - execute commands queued in the pending queue 1894 * @adapter : controller's soft state 1895 * @scb_q : SCB to be queued in the pending list 1896 * 1897 * Scan the pending list for commands which are not yet issued and try to 1898 * post to the controller. The SCB can be a null pointer, which would indicate 1899 * no SCB to be queue, just try to execute the ones in the pending list. 1900 * 1901 * NOTE: We do not actually traverse the pending list. The SCBs are plucked 1902 * out from the head of the pending list. If it is successfully issued, the 1903 * next SCB is at the head now. 1904 */ 1905 static void 1906 megaraid_mbox_runpendq(adapter_t *adapter, scb_t *scb_q) 1907 { 1908 scb_t *scb; 1909 unsigned long flags; 1910 1911 spin_lock_irqsave(PENDING_LIST_LOCK(adapter), flags); 1912 1913 if (scb_q) { 1914 scb_q->state = SCB_PENDQ; 1915 list_add_tail(&scb_q->list, &adapter->pend_list); 1916 } 1917 1918 // if the adapter in not in quiescent mode, post the commands to FW 1919 if (adapter->quiescent) { 1920 spin_unlock_irqrestore(PENDING_LIST_LOCK(adapter), flags); 1921 return; 1922 } 1923 1924 while (!list_empty(&adapter->pend_list)) { 1925 1926 assert_spin_locked(PENDING_LIST_LOCK(adapter)); 1927 1928 scb = list_entry(adapter->pend_list.next, scb_t, list); 1929 1930 // remove the scb from the pending list and try to 1931 // issue. If we are unable to issue it, put back in 1932 // the pending list and return 1933 1934 list_del_init(&scb->list); 1935 1936 spin_unlock_irqrestore(PENDING_LIST_LOCK(adapter), flags); 1937 1938 // if mailbox was busy, return SCB back to pending 1939 // list. Make sure to add at the head, since that's 1940 // where it would have been removed from 1941 1942 scb->state = SCB_ISSUED; 1943 1944 if (mbox_post_cmd(adapter, scb) != 0) { 1945 1946 spin_lock_irqsave(PENDING_LIST_LOCK(adapter), flags); 1947 1948 scb->state = SCB_PENDQ; 1949 1950 list_add(&scb->list, &adapter->pend_list); 1951 1952 spin_unlock_irqrestore(PENDING_LIST_LOCK(adapter), 1953 flags); 1954 1955 return; 1956 } 1957 1958 spin_lock_irqsave(PENDING_LIST_LOCK(adapter), flags); 1959 } 1960 1961 spin_unlock_irqrestore(PENDING_LIST_LOCK(adapter), flags); 1962 1963 1964 return; 1965 } 1966 1967 1968 /** 1969 * megaraid_mbox_prepare_pthru - prepare a command for physical devices 1970 * @adapter : pointer to controller's soft state 1971 * @scb : scsi control block 1972 * @scp : scsi command from the mid-layer 1973 * 1974 * Prepare a command for the scsi physical devices. 1975 */ 1976 static void 1977 megaraid_mbox_prepare_pthru(adapter_t *adapter, scb_t *scb, 1978 struct scsi_cmnd *scp) 1979 { 1980 mbox_ccb_t *ccb; 1981 mraid_passthru_t *pthru; 1982 uint8_t channel; 1983 uint8_t target; 1984 1985 ccb = (mbox_ccb_t *)scb->ccb; 1986 pthru = ccb->pthru; 1987 channel = scb->dev_channel; 1988 target = scb->dev_target; 1989 1990 // 0=6sec, 1=60sec, 2=10min, 3=3hrs, 4=NO timeout 1991 pthru->timeout = 4; 1992 pthru->ars = 1; 1993 pthru->islogical = 0; 1994 pthru->channel = 0; 1995 pthru->target = (channel << 4) | target; 1996 pthru->logdrv = SCP2LUN(scp); 1997 pthru->reqsenselen = 14; 1998 pthru->cdblen = scp->cmd_len; 1999 2000 memcpy(pthru->cdb, scp->cmnd, scp->cmd_len); 2001 2002 if (scsi_bufflen(scp)) { 2003 pthru->dataxferlen = scsi_bufflen(scp); 2004 pthru->dataxferaddr = ccb->sgl_dma_h; 2005 pthru->numsge = megaraid_mbox_mksgl(adapter, scb); 2006 } 2007 else { 2008 pthru->dataxferaddr = 0; 2009 pthru->dataxferlen = 0; 2010 pthru->numsge = 0; 2011 } 2012 return; 2013 } 2014 2015 2016 /** 2017 * megaraid_mbox_prepare_epthru - prepare a command for physical devices 2018 * @adapter : pointer to controller's soft state 2019 * @scb : scsi control block 2020 * @scp : scsi command from the mid-layer 2021 * 2022 * Prepare a command for the scsi physical devices. This rountine prepares 2023 * commands for devices which can take extended CDBs (>10 bytes). 2024 */ 2025 static void 2026 megaraid_mbox_prepare_epthru(adapter_t *adapter, scb_t *scb, 2027 struct scsi_cmnd *scp) 2028 { 2029 mbox_ccb_t *ccb; 2030 mraid_epassthru_t *epthru; 2031 uint8_t channel; 2032 uint8_t target; 2033 2034 ccb = (mbox_ccb_t *)scb->ccb; 2035 epthru = ccb->epthru; 2036 channel = scb->dev_channel; 2037 target = scb->dev_target; 2038 2039 // 0=6sec, 1=60sec, 2=10min, 3=3hrs, 4=NO timeout 2040 epthru->timeout = 4; 2041 epthru->ars = 1; 2042 epthru->islogical = 0; 2043 epthru->channel = 0; 2044 epthru->target = (channel << 4) | target; 2045 epthru->logdrv = SCP2LUN(scp); 2046 epthru->reqsenselen = 14; 2047 epthru->cdblen = scp->cmd_len; 2048 2049 memcpy(epthru->cdb, scp->cmnd, scp->cmd_len); 2050 2051 if (scsi_bufflen(scp)) { 2052 epthru->dataxferlen = scsi_bufflen(scp); 2053 epthru->dataxferaddr = ccb->sgl_dma_h; 2054 epthru->numsge = megaraid_mbox_mksgl(adapter, scb); 2055 } 2056 else { 2057 epthru->dataxferaddr = 0; 2058 epthru->dataxferlen = 0; 2059 epthru->numsge = 0; 2060 } 2061 return; 2062 } 2063 2064 2065 /** 2066 * megaraid_ack_sequence - interrupt ack sequence for memory mapped HBAs 2067 * @adapter : controller's soft state 2068 * 2069 * Interrupt acknowledgement sequence for memory mapped HBAs. Find out the 2070 * completed command and put them on the completed list for later processing. 2071 * 2072 * Returns: 1 if the interrupt is valid, 0 otherwise 2073 */ 2074 static int 2075 megaraid_ack_sequence(adapter_t *adapter) 2076 { 2077 mraid_device_t *raid_dev = ADAP2RAIDDEV(adapter); 2078 mbox_t *mbox; 2079 scb_t *scb; 2080 uint8_t nstatus; 2081 uint8_t completed[MBOX_MAX_FIRMWARE_STATUS]; 2082 struct list_head clist; 2083 int handled; 2084 uint32_t dword; 2085 unsigned long flags; 2086 int i, j; 2087 2088 2089 mbox = raid_dev->mbox; 2090 2091 // move the SCBs from the firmware completed array to our local list 2092 INIT_LIST_HEAD(&clist); 2093 2094 // loop till F/W has more commands for us to complete 2095 handled = 0; 2096 spin_lock_irqsave(MAILBOX_LOCK(raid_dev), flags); 2097 do { 2098 /* 2099 * Check if a valid interrupt is pending. If found, force the 2100 * interrupt line low. 2101 */ 2102 dword = RDOUTDOOR(raid_dev); 2103 if (dword != 0x10001234) break; 2104 2105 handled = 1; 2106 2107 WROUTDOOR(raid_dev, 0x10001234); 2108 2109 nstatus = 0; 2110 // wait for valid numstatus to post 2111 for (i = 0; i < 0xFFFFF; i++) { 2112 if (mbox->numstatus != 0xFF) { 2113 nstatus = mbox->numstatus; 2114 break; 2115 } 2116 rmb(); 2117 } 2118 mbox->numstatus = 0xFF; 2119 2120 adapter->outstanding_cmds -= nstatus; 2121 2122 for (i = 0; i < nstatus; i++) { 2123 2124 // wait for valid command index to post 2125 for (j = 0; j < 0xFFFFF; j++) { 2126 if (mbox->completed[i] != 0xFF) break; 2127 rmb(); 2128 } 2129 completed[i] = mbox->completed[i]; 2130 mbox->completed[i] = 0xFF; 2131 2132 if (completed[i] == 0xFF) { 2133 con_log(CL_ANN, (KERN_CRIT 2134 "megaraid: command posting timed out\n")); 2135 2136 BUG(); 2137 continue; 2138 } 2139 2140 // Get SCB associated with this command id 2141 if (completed[i] >= MBOX_MAX_SCSI_CMDS) { 2142 // a cmm command 2143 scb = adapter->uscb_list + (completed[i] - 2144 MBOX_MAX_SCSI_CMDS); 2145 } 2146 else { 2147 // an os command 2148 scb = adapter->kscb_list + completed[i]; 2149 } 2150 2151 scb->status = mbox->status; 2152 list_add_tail(&scb->list, &clist); 2153 } 2154 2155 // Acknowledge interrupt 2156 WRINDOOR(raid_dev, 0x02); 2157 2158 } while(1); 2159 2160 spin_unlock_irqrestore(MAILBOX_LOCK(raid_dev), flags); 2161 2162 2163 // put the completed commands in the completed list. DPC would 2164 // complete these commands later 2165 spin_lock_irqsave(COMPLETED_LIST_LOCK(adapter), flags); 2166 2167 list_splice(&clist, &adapter->completed_list); 2168 2169 spin_unlock_irqrestore(COMPLETED_LIST_LOCK(adapter), flags); 2170 2171 2172 // schedule the DPC if there is some work for it 2173 if (handled) 2174 tasklet_schedule(&adapter->dpc_h); 2175 2176 return handled; 2177 } 2178 2179 2180 /** 2181 * megaraid_isr - isr for memory based mailbox based controllers 2182 * @irq : irq 2183 * @devp : pointer to our soft state 2184 * 2185 * Interrupt service routine for memory-mapped mailbox controllers. 2186 */ 2187 static irqreturn_t 2188 megaraid_isr(int irq, void *devp) 2189 { 2190 adapter_t *adapter = devp; 2191 int handled; 2192 2193 handled = megaraid_ack_sequence(adapter); 2194 2195 /* Loop through any pending requests */ 2196 if (!adapter->quiescent) { 2197 megaraid_mbox_runpendq(adapter, NULL); 2198 } 2199 2200 return IRQ_RETVAL(handled); 2201 } 2202 2203 2204 /** 2205 * megaraid_mbox_sync_scb - sync kernel buffers 2206 * @adapter : controller's soft state 2207 * @scb : pointer to the resource packet 2208 * 2209 * DMA sync if required. 2210 */ 2211 static void 2212 megaraid_mbox_sync_scb(adapter_t *adapter, scb_t *scb) 2213 { 2214 mbox_ccb_t *ccb; 2215 2216 ccb = (mbox_ccb_t *)scb->ccb; 2217 2218 if (scb->dma_direction == PCI_DMA_FROMDEVICE) 2219 pci_dma_sync_sg_for_cpu(adapter->pdev, 2220 scsi_sglist(scb->scp), 2221 scsi_sg_count(scb->scp), 2222 PCI_DMA_FROMDEVICE); 2223 2224 scsi_dma_unmap(scb->scp); 2225 return; 2226 } 2227 2228 2229 /** 2230 * megaraid_mbox_dpc - the tasklet to complete the commands from completed list 2231 * @devp : pointer to HBA soft state 2232 * 2233 * Pick up the commands from the completed list and send back to the owners. 2234 * This is a reentrant function and does not assume any locks are held while 2235 * it is being called. 2236 */ 2237 static void 2238 megaraid_mbox_dpc(unsigned long devp) 2239 { 2240 adapter_t *adapter = (adapter_t *)devp; 2241 mraid_device_t *raid_dev; 2242 struct list_head clist; 2243 struct scatterlist *sgl; 2244 scb_t *scb; 2245 scb_t *tmp; 2246 struct scsi_cmnd *scp; 2247 mraid_passthru_t *pthru; 2248 mraid_epassthru_t *epthru; 2249 mbox_ccb_t *ccb; 2250 int islogical; 2251 int pdev_index; 2252 int pdev_state; 2253 mbox_t *mbox; 2254 unsigned long flags; 2255 uint8_t c; 2256 int status; 2257 uioc_t *kioc; 2258 2259 2260 if (!adapter) return; 2261 2262 raid_dev = ADAP2RAIDDEV(adapter); 2263 2264 // move the SCBs from the completed list to our local list 2265 INIT_LIST_HEAD(&clist); 2266 2267 spin_lock_irqsave(COMPLETED_LIST_LOCK(adapter), flags); 2268 2269 list_splice_init(&adapter->completed_list, &clist); 2270 2271 spin_unlock_irqrestore(COMPLETED_LIST_LOCK(adapter), flags); 2272 2273 2274 list_for_each_entry_safe(scb, tmp, &clist, list) { 2275 2276 status = scb->status; 2277 scp = scb->scp; 2278 ccb = (mbox_ccb_t *)scb->ccb; 2279 pthru = ccb->pthru; 2280 epthru = ccb->epthru; 2281 mbox = ccb->mbox; 2282 2283 // Make sure f/w has completed a valid command 2284 if (scb->state != SCB_ISSUED) { 2285 con_log(CL_ANN, (KERN_CRIT 2286 "megaraid critical err: invalid command %d:%d:%p\n", 2287 scb->sno, scb->state, scp)); 2288 BUG(); 2289 continue; // Must never happen! 2290 } 2291 2292 // check for the management command and complete it right away 2293 if (scb->sno >= MBOX_MAX_SCSI_CMDS) { 2294 scb->state = SCB_FREE; 2295 scb->status = status; 2296 2297 // remove from local clist 2298 list_del_init(&scb->list); 2299 2300 kioc = (uioc_t *)scb->gp; 2301 kioc->status = 0; 2302 2303 megaraid_mbox_mm_done(adapter, scb); 2304 2305 continue; 2306 } 2307 2308 // Was an abort issued for this command earlier 2309 if (scb->state & SCB_ABORT) { 2310 con_log(CL_ANN, (KERN_NOTICE 2311 "megaraid: aborted cmd %lx[%x] completed\n", 2312 scp->serial_number, scb->sno)); 2313 } 2314 2315 /* 2316 * If the inquiry came of a disk drive which is not part of 2317 * any RAID array, expose it to the kernel. For this to be 2318 * enabled, user must set the "megaraid_expose_unconf_disks" 2319 * flag to 1 by specifying it on module parameter list. 2320 * This would enable data migration off drives from other 2321 * configurations. 2322 */ 2323 islogical = MRAID_IS_LOGICAL(adapter, scp); 2324 if (scp->cmnd[0] == INQUIRY && status == 0 && islogical == 0 2325 && IS_RAID_CH(raid_dev, scb->dev_channel)) { 2326 2327 sgl = scsi_sglist(scp); 2328 if (sg_page(sgl)) { 2329 c = *(unsigned char *) sg_virt(&sgl[0]); 2330 } else { 2331 con_log(CL_ANN, (KERN_WARNING 2332 "megaraid mailbox: invalid sg:%d\n", 2333 __LINE__)); 2334 c = 0; 2335 } 2336 2337 if ((c & 0x1F ) == TYPE_DISK) { 2338 pdev_index = (scb->dev_channel * 16) + 2339 scb->dev_target; 2340 pdev_state = 2341 raid_dev->pdrv_state[pdev_index] & 0x0F; 2342 2343 if (pdev_state == PDRV_ONLINE || 2344 pdev_state == PDRV_FAILED || 2345 pdev_state == PDRV_RBLD || 2346 pdev_state == PDRV_HOTSPARE || 2347 megaraid_expose_unconf_disks == 0) { 2348 2349 status = 0xF0; 2350 } 2351 } 2352 } 2353 2354 // Convert MegaRAID status to Linux error code 2355 switch (status) { 2356 2357 case 0x00: 2358 2359 scp->result = (DID_OK << 16); 2360 break; 2361 2362 case 0x02: 2363 2364 /* set sense_buffer and result fields */ 2365 if (mbox->cmd == MBOXCMD_PASSTHRU || 2366 mbox->cmd == MBOXCMD_PASSTHRU64) { 2367 2368 memcpy(scp->sense_buffer, pthru->reqsensearea, 2369 14); 2370 2371 scp->result = DRIVER_SENSE << 24 | 2372 DID_OK << 16 | CHECK_CONDITION << 1; 2373 } 2374 else { 2375 if (mbox->cmd == MBOXCMD_EXTPTHRU) { 2376 2377 memcpy(scp->sense_buffer, 2378 epthru->reqsensearea, 14); 2379 2380 scp->result = DRIVER_SENSE << 24 | 2381 DID_OK << 16 | 2382 CHECK_CONDITION << 1; 2383 } else { 2384 scp->sense_buffer[0] = 0x70; 2385 scp->sense_buffer[2] = ABORTED_COMMAND; 2386 scp->result = CHECK_CONDITION << 1; 2387 } 2388 } 2389 break; 2390 2391 case 0x08: 2392 2393 scp->result = DID_BUS_BUSY << 16 | status; 2394 break; 2395 2396 default: 2397 2398 /* 2399 * If TEST_UNIT_READY fails, we know RESERVATION_STATUS 2400 * failed 2401 */ 2402 if (scp->cmnd[0] == TEST_UNIT_READY) { 2403 scp->result = DID_ERROR << 16 | 2404 RESERVATION_CONFLICT << 1; 2405 } 2406 else 2407 /* 2408 * Error code returned is 1 if Reserve or Release 2409 * failed or the input parameter is invalid 2410 */ 2411 if (status == 1 && (scp->cmnd[0] == RESERVE || 2412 scp->cmnd[0] == RELEASE)) { 2413 2414 scp->result = DID_ERROR << 16 | 2415 RESERVATION_CONFLICT << 1; 2416 } 2417 else { 2418 scp->result = DID_BAD_TARGET << 16 | status; 2419 } 2420 } 2421 2422 // print a debug message for all failed commands 2423 if (status) { 2424 megaraid_mbox_display_scb(adapter, scb); 2425 } 2426 2427 // Free our internal resources and call the mid-layer callback 2428 // routine 2429 megaraid_mbox_sync_scb(adapter, scb); 2430 2431 // remove from local clist 2432 list_del_init(&scb->list); 2433 2434 // put back in free list 2435 megaraid_dealloc_scb(adapter, scb); 2436 2437 // send the scsi packet back to kernel 2438 scp->scsi_done(scp); 2439 } 2440 2441 return; 2442 } 2443 2444 2445 /** 2446 * megaraid_abort_handler - abort the scsi command 2447 * @scp : command to be aborted 2448 * 2449 * Abort a previous SCSI request. Only commands on the pending list can be 2450 * aborted. All the commands issued to the F/W must complete. 2451 **/ 2452 static int 2453 megaraid_abort_handler(struct scsi_cmnd *scp) 2454 { 2455 adapter_t *adapter; 2456 mraid_device_t *raid_dev; 2457 scb_t *scb; 2458 scb_t *tmp; 2459 int found; 2460 unsigned long flags; 2461 int i; 2462 2463 2464 adapter = SCP2ADAPTER(scp); 2465 raid_dev = ADAP2RAIDDEV(adapter); 2466 2467 con_log(CL_ANN, (KERN_WARNING 2468 "megaraid: aborting-%ld cmd=%x <c=%d t=%d l=%d>\n", 2469 scp->serial_number, scp->cmnd[0], SCP2CHANNEL(scp), 2470 SCP2TARGET(scp), SCP2LUN(scp))); 2471 2472 // If FW has stopped responding, simply return failure 2473 if (raid_dev->hw_error) { 2474 con_log(CL_ANN, (KERN_NOTICE 2475 "megaraid: hw error, not aborting\n")); 2476 return FAILED; 2477 } 2478 2479 // There might a race here, where the command was completed by the 2480 // firmware and now it is on the completed list. Before we could 2481 // complete the command to the kernel in dpc, the abort came. 2482 // Find out if this is the case to avoid the race. 2483 scb = NULL; 2484 spin_lock_irqsave(COMPLETED_LIST_LOCK(adapter), flags); 2485 list_for_each_entry_safe(scb, tmp, &adapter->completed_list, list) { 2486 2487 if (scb->scp == scp) { // Found command 2488 2489 list_del_init(&scb->list); // from completed list 2490 2491 con_log(CL_ANN, (KERN_WARNING 2492 "megaraid: %ld:%d[%d:%d], abort from completed list\n", 2493 scp->serial_number, scb->sno, 2494 scb->dev_channel, scb->dev_target)); 2495 2496 scp->result = (DID_ABORT << 16); 2497 scp->scsi_done(scp); 2498 2499 megaraid_dealloc_scb(adapter, scb); 2500 2501 spin_unlock_irqrestore(COMPLETED_LIST_LOCK(adapter), 2502 flags); 2503 2504 return SUCCESS; 2505 } 2506 } 2507 spin_unlock_irqrestore(COMPLETED_LIST_LOCK(adapter), flags); 2508 2509 2510 // Find out if this command is still on the pending list. If it is and 2511 // was never issued, abort and return success. If the command is owned 2512 // by the firmware, we must wait for it to complete by the FW. 2513 spin_lock_irqsave(PENDING_LIST_LOCK(adapter), flags); 2514 list_for_each_entry_safe(scb, tmp, &adapter->pend_list, list) { 2515 2516 if (scb->scp == scp) { // Found command 2517 2518 list_del_init(&scb->list); // from pending list 2519 2520 ASSERT(!(scb->state & SCB_ISSUED)); 2521 2522 con_log(CL_ANN, (KERN_WARNING 2523 "megaraid abort: %ld[%d:%d], driver owner\n", 2524 scp->serial_number, scb->dev_channel, 2525 scb->dev_target)); 2526 2527 scp->result = (DID_ABORT << 16); 2528 scp->scsi_done(scp); 2529 2530 megaraid_dealloc_scb(adapter, scb); 2531 2532 spin_unlock_irqrestore(PENDING_LIST_LOCK(adapter), 2533 flags); 2534 2535 return SUCCESS; 2536 } 2537 } 2538 spin_unlock_irqrestore(PENDING_LIST_LOCK(adapter), flags); 2539 2540 2541 // Check do we even own this command, in which case this would be 2542 // owned by the firmware. The only way to locate the FW scb is to 2543 // traverse through the list of all SCB, since driver does not 2544 // maintain these SCBs on any list 2545 found = 0; 2546 spin_lock_irq(&adapter->lock); 2547 for (i = 0; i < MBOX_MAX_SCSI_CMDS; i++) { 2548 scb = adapter->kscb_list + i; 2549 2550 if (scb->scp == scp) { 2551 2552 found = 1; 2553 2554 if (!(scb->state & SCB_ISSUED)) { 2555 con_log(CL_ANN, (KERN_WARNING 2556 "megaraid abort: %ld%d[%d:%d], invalid state\n", 2557 scp->serial_number, scb->sno, scb->dev_channel, 2558 scb->dev_target)); 2559 BUG(); 2560 } 2561 else { 2562 con_log(CL_ANN, (KERN_WARNING 2563 "megaraid abort: %ld:%d[%d:%d], fw owner\n", 2564 scp->serial_number, scb->sno, scb->dev_channel, 2565 scb->dev_target)); 2566 } 2567 } 2568 } 2569 spin_unlock_irq(&adapter->lock); 2570 2571 if (!found) { 2572 con_log(CL_ANN, (KERN_WARNING 2573 "megaraid abort: scsi cmd:%ld, do now own\n", 2574 scp->serial_number)); 2575 2576 // FIXME: Should there be a callback for this command? 2577 return SUCCESS; 2578 } 2579 2580 // We cannot actually abort a command owned by firmware, return 2581 // failure and wait for reset. In host reset handler, we will find out 2582 // if the HBA is still live 2583 return FAILED; 2584 } 2585 2586 /** 2587 * megaraid_reset_handler - device reset hadler for mailbox based driver 2588 * @scp : reference command 2589 * 2590 * Reset handler for the mailbox based controller. First try to find out if 2591 * the FW is still live, in which case the outstanding commands counter mut go 2592 * down to 0. If that happens, also issue the reservation reset command to 2593 * relinquish (possible) reservations on the logical drives connected to this 2594 * host. 2595 **/ 2596 static int 2597 megaraid_reset_handler(struct scsi_cmnd *scp) 2598 { 2599 adapter_t *adapter; 2600 scb_t *scb; 2601 scb_t *tmp; 2602 mraid_device_t *raid_dev; 2603 unsigned long flags; 2604 uint8_t raw_mbox[sizeof(mbox_t)]; 2605 int rval; 2606 int recovery_window; 2607 int recovering; 2608 int i; 2609 uioc_t *kioc; 2610 2611 adapter = SCP2ADAPTER(scp); 2612 raid_dev = ADAP2RAIDDEV(adapter); 2613 2614 // return failure if adapter is not responding 2615 if (raid_dev->hw_error) { 2616 con_log(CL_ANN, (KERN_NOTICE 2617 "megaraid: hw error, cannot reset\n")); 2618 return FAILED; 2619 } 2620 2621 2622 // Under exceptional conditions, FW can take up to 3 minutes to 2623 // complete command processing. Wait for additional 2 minutes for the 2624 // pending commands counter to go down to 0. If it doesn't, let the 2625 // controller be marked offline 2626 // Also, reset all the commands currently owned by the driver 2627 spin_lock_irqsave(PENDING_LIST_LOCK(adapter), flags); 2628 list_for_each_entry_safe(scb, tmp, &adapter->pend_list, list) { 2629 list_del_init(&scb->list); // from pending list 2630 2631 if (scb->sno >= MBOX_MAX_SCSI_CMDS) { 2632 con_log(CL_ANN, (KERN_WARNING 2633 "megaraid: IOCTL packet with %d[%d:%d] being reset\n", 2634 scb->sno, scb->dev_channel, scb->dev_target)); 2635 2636 scb->status = -1; 2637 2638 kioc = (uioc_t *)scb->gp; 2639 kioc->status = -EFAULT; 2640 2641 megaraid_mbox_mm_done(adapter, scb); 2642 } else { 2643 if (scb->scp == scp) { // Found command 2644 con_log(CL_ANN, (KERN_WARNING 2645 "megaraid: %ld:%d[%d:%d], reset from pending list\n", 2646 scp->serial_number, scb->sno, 2647 scb->dev_channel, scb->dev_target)); 2648 } else { 2649 con_log(CL_ANN, (KERN_WARNING 2650 "megaraid: IO packet with %d[%d:%d] being reset\n", 2651 scb->sno, scb->dev_channel, scb->dev_target)); 2652 } 2653 2654 scb->scp->result = (DID_RESET << 16); 2655 scb->scp->scsi_done(scb->scp); 2656 2657 megaraid_dealloc_scb(adapter, scb); 2658 } 2659 } 2660 spin_unlock_irqrestore(PENDING_LIST_LOCK(adapter), flags); 2661 2662 if (adapter->outstanding_cmds) { 2663 con_log(CL_ANN, (KERN_NOTICE 2664 "megaraid: %d outstanding commands. Max wait %d sec\n", 2665 adapter->outstanding_cmds, 2666 (MBOX_RESET_WAIT + MBOX_RESET_EXT_WAIT))); 2667 } 2668 2669 recovery_window = MBOX_RESET_WAIT + MBOX_RESET_EXT_WAIT; 2670 2671 recovering = adapter->outstanding_cmds; 2672 2673 for (i = 0; i < recovery_window; i++) { 2674 2675 megaraid_ack_sequence(adapter); 2676 2677 // print a message once every 5 seconds only 2678 if (!(i % 5)) { 2679 con_log(CL_ANN, ( 2680 "megaraid mbox: Wait for %d commands to complete:%d\n", 2681 adapter->outstanding_cmds, 2682 (MBOX_RESET_WAIT + MBOX_RESET_EXT_WAIT) - i)); 2683 } 2684 2685 // bailout if no recovery happended in reset time 2686 if (adapter->outstanding_cmds == 0) { 2687 break; 2688 } 2689 2690 msleep(1000); 2691 } 2692 2693 spin_lock(&adapter->lock); 2694 2695 // If still outstanding commands, bail out 2696 if (adapter->outstanding_cmds) { 2697 con_log(CL_ANN, (KERN_WARNING 2698 "megaraid mbox: critical hardware error!\n")); 2699 2700 raid_dev->hw_error = 1; 2701 2702 rval = FAILED; 2703 goto out; 2704 } 2705 else { 2706 con_log(CL_ANN, (KERN_NOTICE 2707 "megaraid mbox: reset sequence completed sucessfully\n")); 2708 } 2709 2710 2711 // If the controller supports clustering, reset reservations 2712 if (!adapter->ha) { 2713 rval = SUCCESS; 2714 goto out; 2715 } 2716 2717 // clear reservations if any 2718 raw_mbox[0] = CLUSTER_CMD; 2719 raw_mbox[2] = RESET_RESERVATIONS; 2720 2721 rval = SUCCESS; 2722 if (mbox_post_sync_cmd_fast(adapter, raw_mbox) == 0) { 2723 con_log(CL_ANN, 2724 (KERN_INFO "megaraid: reservation reset\n")); 2725 } 2726 else { 2727 rval = FAILED; 2728 con_log(CL_ANN, (KERN_WARNING 2729 "megaraid: reservation reset failed\n")); 2730 } 2731 2732 out: 2733 spin_unlock_irq(&adapter->lock); 2734 return rval; 2735 } 2736 2737 /* 2738 * START: internal commands library 2739 * 2740 * This section of the driver has the common routine used by the driver and 2741 * also has all the FW routines 2742 */ 2743 2744 /** 2745 * mbox_post_sync_cmd() - blocking command to the mailbox based controllers 2746 * @adapter : controller's soft state 2747 * @raw_mbox : the mailbox 2748 * 2749 * Issue a scb in synchronous and non-interrupt mode for mailbox based 2750 * controllers. 2751 */ 2752 static int 2753 mbox_post_sync_cmd(adapter_t *adapter, uint8_t raw_mbox[]) 2754 { 2755 mraid_device_t *raid_dev = ADAP2RAIDDEV(adapter); 2756 mbox64_t *mbox64; 2757 mbox_t *mbox; 2758 uint8_t status; 2759 int i; 2760 2761 2762 mbox64 = raid_dev->mbox64; 2763 mbox = raid_dev->mbox; 2764 2765 /* 2766 * Wait until mailbox is free 2767 */ 2768 if (megaraid_busywait_mbox(raid_dev) != 0) 2769 goto blocked_mailbox; 2770 2771 /* 2772 * Copy mailbox data into host structure 2773 */ 2774 memcpy((caddr_t)mbox, (caddr_t)raw_mbox, 16); 2775 mbox->cmdid = 0xFE; 2776 mbox->busy = 1; 2777 mbox->poll = 0; 2778 mbox->ack = 0; 2779 mbox->numstatus = 0xFF; 2780 mbox->status = 0xFF; 2781 2782 wmb(); 2783 WRINDOOR(raid_dev, raid_dev->mbox_dma | 0x1); 2784 2785 // wait for maximum 1 second for status to post. If the status is not 2786 // available within 1 second, assume FW is initializing and wait 2787 // for an extended amount of time 2788 if (mbox->numstatus == 0xFF) { // status not yet available 2789 udelay(25); 2790 2791 for (i = 0; mbox->numstatus == 0xFF && i < 1000; i++) { 2792 rmb(); 2793 msleep(1); 2794 } 2795 2796 2797 if (i == 1000) { 2798 con_log(CL_ANN, (KERN_NOTICE 2799 "megaraid mailbox: wait for FW to boot ")); 2800 2801 for (i = 0; (mbox->numstatus == 0xFF) && 2802 (i < MBOX_RESET_WAIT); i++) { 2803 rmb(); 2804 con_log(CL_ANN, ("\b\b\b\b\b[%03d]", 2805 MBOX_RESET_WAIT - i)); 2806 msleep(1000); 2807 } 2808 2809 if (i == MBOX_RESET_WAIT) { 2810 2811 con_log(CL_ANN, ( 2812 "\nmegaraid mailbox: status not available\n")); 2813 2814 return -1; 2815 } 2816 con_log(CL_ANN, ("\b\b\b\b\b[ok] \n")); 2817 } 2818 } 2819 2820 // wait for maximum 1 second for poll semaphore 2821 if (mbox->poll != 0x77) { 2822 udelay(25); 2823 2824 for (i = 0; (mbox->poll != 0x77) && (i < 1000); i++) { 2825 rmb(); 2826 msleep(1); 2827 } 2828 2829 if (i == 1000) { 2830 con_log(CL_ANN, (KERN_WARNING 2831 "megaraid mailbox: could not get poll semaphore\n")); 2832 return -1; 2833 } 2834 } 2835 2836 WRINDOOR(raid_dev, raid_dev->mbox_dma | 0x2); 2837 wmb(); 2838 2839 // wait for maximum 1 second for acknowledgement 2840 if (RDINDOOR(raid_dev) & 0x2) { 2841 udelay(25); 2842 2843 for (i = 0; (RDINDOOR(raid_dev) & 0x2) && (i < 1000); i++) { 2844 rmb(); 2845 msleep(1); 2846 } 2847 2848 if (i == 1000) { 2849 con_log(CL_ANN, (KERN_WARNING 2850 "megaraid mailbox: could not acknowledge\n")); 2851 return -1; 2852 } 2853 } 2854 mbox->poll = 0; 2855 mbox->ack = 0x77; 2856 2857 status = mbox->status; 2858 2859 // invalidate the completed command id array. After command 2860 // completion, firmware would write the valid id. 2861 mbox->numstatus = 0xFF; 2862 mbox->status = 0xFF; 2863 for (i = 0; i < MBOX_MAX_FIRMWARE_STATUS; i++) { 2864 mbox->completed[i] = 0xFF; 2865 } 2866 2867 return status; 2868 2869 blocked_mailbox: 2870 2871 con_log(CL_ANN, (KERN_WARNING "megaraid: blocked mailbox\n") ); 2872 return -1; 2873 } 2874 2875 2876 /** 2877 * mbox_post_sync_cmd_fast - blocking command to the mailbox based controllers 2878 * @adapter : controller's soft state 2879 * @raw_mbox : the mailbox 2880 * 2881 * Issue a scb in synchronous and non-interrupt mode for mailbox based 2882 * controllers. This is a faster version of the synchronous command and 2883 * therefore can be called in interrupt-context as well. 2884 */ 2885 static int 2886 mbox_post_sync_cmd_fast(adapter_t *adapter, uint8_t raw_mbox[]) 2887 { 2888 mraid_device_t *raid_dev = ADAP2RAIDDEV(adapter); 2889 mbox_t *mbox; 2890 long i; 2891 2892 2893 mbox = raid_dev->mbox; 2894 2895 // return immediately if the mailbox is busy 2896 if (mbox->busy) return -1; 2897 2898 // Copy mailbox data into host structure 2899 memcpy((caddr_t)mbox, (caddr_t)raw_mbox, 14); 2900 mbox->cmdid = 0xFE; 2901 mbox->busy = 1; 2902 mbox->poll = 0; 2903 mbox->ack = 0; 2904 mbox->numstatus = 0xFF; 2905 mbox->status = 0xFF; 2906 2907 wmb(); 2908 WRINDOOR(raid_dev, raid_dev->mbox_dma | 0x1); 2909 2910 for (i = 0; i < MBOX_SYNC_WAIT_CNT; i++) { 2911 if (mbox->numstatus != 0xFF) break; 2912 rmb(); 2913 udelay(MBOX_SYNC_DELAY_200); 2914 } 2915 2916 if (i == MBOX_SYNC_WAIT_CNT) { 2917 // We may need to re-calibrate the counter 2918 con_log(CL_ANN, (KERN_CRIT 2919 "megaraid: fast sync command timed out\n")); 2920 } 2921 2922 WRINDOOR(raid_dev, raid_dev->mbox_dma | 0x2); 2923 wmb(); 2924 2925 return mbox->status; 2926 } 2927 2928 2929 /** 2930 * megaraid_busywait_mbox() - Wait until the controller's mailbox is available 2931 * @raid_dev : RAID device (HBA) soft state 2932 * 2933 * Wait until the controller's mailbox is available to accept more commands. 2934 * Wait for at most 1 second. 2935 */ 2936 static int 2937 megaraid_busywait_mbox(mraid_device_t *raid_dev) 2938 { 2939 mbox_t *mbox = raid_dev->mbox; 2940 int i = 0; 2941 2942 if (mbox->busy) { 2943 udelay(25); 2944 for (i = 0; mbox->busy && i < 1000; i++) 2945 msleep(1); 2946 } 2947 2948 if (i < 1000) return 0; 2949 else return -1; 2950 } 2951 2952 2953 /** 2954 * megaraid_mbox_product_info - some static information about the controller 2955 * @adapter : our soft state 2956 * 2957 * Issue commands to the controller to grab some parameters required by our 2958 * caller. 2959 */ 2960 static int 2961 megaraid_mbox_product_info(adapter_t *adapter) 2962 { 2963 mraid_device_t *raid_dev = ADAP2RAIDDEV(adapter); 2964 mbox_t *mbox; 2965 uint8_t raw_mbox[sizeof(mbox_t)]; 2966 mraid_pinfo_t *pinfo; 2967 dma_addr_t pinfo_dma_h; 2968 mraid_inquiry3_t *mraid_inq3; 2969 int i; 2970 2971 2972 memset((caddr_t)raw_mbox, 0, sizeof(raw_mbox)); 2973 mbox = (mbox_t *)raw_mbox; 2974 2975 /* 2976 * Issue an ENQUIRY3 command to find out certain adapter parameters, 2977 * e.g., max channels, max commands etc. 2978 */ 2979 pinfo = pci_alloc_consistent(adapter->pdev, sizeof(mraid_pinfo_t), 2980 &pinfo_dma_h); 2981 2982 if (pinfo == NULL) { 2983 con_log(CL_ANN, (KERN_WARNING 2984 "megaraid: out of memory, %s %d\n", __FUNCTION__, 2985 __LINE__)); 2986 2987 return -1; 2988 } 2989 memset(pinfo, 0, sizeof(mraid_pinfo_t)); 2990 2991 mbox->xferaddr = (uint32_t)adapter->ibuf_dma_h; 2992 memset((void *)adapter->ibuf, 0, MBOX_IBUF_SIZE); 2993 2994 raw_mbox[0] = FC_NEW_CONFIG; 2995 raw_mbox[2] = NC_SUBOP_ENQUIRY3; 2996 raw_mbox[3] = ENQ3_GET_SOLICITED_FULL; 2997 2998 // Issue the command 2999 if (mbox_post_sync_cmd(adapter, raw_mbox) != 0) { 3000 3001 con_log(CL_ANN, (KERN_WARNING "megaraid: Inquiry3 failed\n")); 3002 3003 pci_free_consistent(adapter->pdev, sizeof(mraid_pinfo_t), 3004 pinfo, pinfo_dma_h); 3005 3006 return -1; 3007 } 3008 3009 /* 3010 * Collect information about state of each physical drive 3011 * attached to the controller. We will expose all the disks 3012 * which are not part of RAID 3013 */ 3014 mraid_inq3 = (mraid_inquiry3_t *)adapter->ibuf; 3015 for (i = 0; i < MBOX_MAX_PHYSICAL_DRIVES; i++) { 3016 raid_dev->pdrv_state[i] = mraid_inq3->pdrv_state[i]; 3017 } 3018 3019 /* 3020 * Get product info for information like number of channels, 3021 * maximum commands supported. 3022 */ 3023 memset((caddr_t)raw_mbox, 0, sizeof(raw_mbox)); 3024 mbox->xferaddr = (uint32_t)pinfo_dma_h; 3025 3026 raw_mbox[0] = FC_NEW_CONFIG; 3027 raw_mbox[2] = NC_SUBOP_PRODUCT_INFO; 3028 3029 if (mbox_post_sync_cmd(adapter, raw_mbox) != 0) { 3030 3031 con_log(CL_ANN, (KERN_WARNING 3032 "megaraid: product info failed\n")); 3033 3034 pci_free_consistent(adapter->pdev, sizeof(mraid_pinfo_t), 3035 pinfo, pinfo_dma_h); 3036 3037 return -1; 3038 } 3039 3040 /* 3041 * Setup some parameters for host, as required by our caller 3042 */ 3043 adapter->max_channel = pinfo->nchannels; 3044 3045 /* 3046 * we will export all the logical drives on a single channel. 3047 * Add 1 since inquires do not come for inititor ID 3048 */ 3049 adapter->max_target = MAX_LOGICAL_DRIVES_40LD + 1; 3050 adapter->max_lun = 8; // up to 8 LUNs for non-disk devices 3051 3052 /* 3053 * These are the maximum outstanding commands for the scsi-layer 3054 */ 3055 adapter->max_cmds = MBOX_MAX_SCSI_CMDS; 3056 3057 memset(adapter->fw_version, 0, VERSION_SIZE); 3058 memset(adapter->bios_version, 0, VERSION_SIZE); 3059 3060 memcpy(adapter->fw_version, pinfo->fw_version, 4); 3061 adapter->fw_version[4] = 0; 3062 3063 memcpy(adapter->bios_version, pinfo->bios_version, 4); 3064 adapter->bios_version[4] = 0; 3065 3066 con_log(CL_ANN, (KERN_NOTICE 3067 "megaraid: fw version:[%s] bios version:[%s]\n", 3068 adapter->fw_version, adapter->bios_version)); 3069 3070 pci_free_consistent(adapter->pdev, sizeof(mraid_pinfo_t), pinfo, 3071 pinfo_dma_h); 3072 3073 return 0; 3074 } 3075 3076 3077 3078 /** 3079 * megaraid_mbox_extended_cdb - check for support for extended CDBs 3080 * @adapter : soft state for the controller 3081 * 3082 * This routine check whether the controller in question supports extended 3083 * ( > 10 bytes ) CDBs. 3084 */ 3085 static int 3086 megaraid_mbox_extended_cdb(adapter_t *adapter) 3087 { 3088 mbox_t *mbox; 3089 uint8_t raw_mbox[sizeof(mbox_t)]; 3090 int rval; 3091 3092 mbox = (mbox_t *)raw_mbox; 3093 3094 memset((caddr_t)raw_mbox, 0, sizeof(raw_mbox)); 3095 mbox->xferaddr = (uint32_t)adapter->ibuf_dma_h; 3096 3097 memset((void *)adapter->ibuf, 0, MBOX_IBUF_SIZE); 3098 3099 raw_mbox[0] = MAIN_MISC_OPCODE; 3100 raw_mbox[2] = SUPPORT_EXT_CDB; 3101 3102 /* 3103 * Issue the command 3104 */ 3105 rval = 0; 3106 if (mbox_post_sync_cmd(adapter, raw_mbox) != 0) { 3107 rval = -1; 3108 } 3109 3110 return rval; 3111 } 3112 3113 3114 /** 3115 * megaraid_mbox_support_ha - Do we support clustering 3116 * @adapter : soft state for the controller 3117 * @init_id : ID of the initiator 3118 * 3119 * Determine if the firmware supports clustering and the ID of the initiator. 3120 */ 3121 static int 3122 megaraid_mbox_support_ha(adapter_t *adapter, uint16_t *init_id) 3123 { 3124 mbox_t *mbox; 3125 uint8_t raw_mbox[sizeof(mbox_t)]; 3126 int rval; 3127 3128 3129 mbox = (mbox_t *)raw_mbox; 3130 3131 memset((caddr_t)raw_mbox, 0, sizeof(raw_mbox)); 3132 3133 mbox->xferaddr = (uint32_t)adapter->ibuf_dma_h; 3134 3135 memset((void *)adapter->ibuf, 0, MBOX_IBUF_SIZE); 3136 3137 raw_mbox[0] = GET_TARGET_ID; 3138 3139 // Issue the command 3140 *init_id = 7; 3141 rval = -1; 3142 if (mbox_post_sync_cmd(adapter, raw_mbox) == 0) { 3143 3144 *init_id = *(uint8_t *)adapter->ibuf; 3145 3146 con_log(CL_ANN, (KERN_INFO 3147 "megaraid: cluster firmware, initiator ID: %d\n", 3148 *init_id)); 3149 3150 rval = 0; 3151 } 3152 3153 return rval; 3154 } 3155 3156 3157 /** 3158 * megaraid_mbox_support_random_del - Do we support random deletion 3159 * @adapter : soft state for the controller 3160 * 3161 * Determine if the firmware supports random deletion. 3162 * Return: 1 is operation supported, 0 otherwise 3163 */ 3164 static int 3165 megaraid_mbox_support_random_del(adapter_t *adapter) 3166 { 3167 mbox_t *mbox; 3168 uint8_t raw_mbox[sizeof(mbox_t)]; 3169 int rval; 3170 3171 /* 3172 * Newer firmware on Dell CERC expect a different 3173 * random deletion handling, so disable it. 3174 */ 3175 if (adapter->pdev->vendor == PCI_VENDOR_ID_AMI && 3176 adapter->pdev->device == PCI_DEVICE_ID_AMI_MEGARAID3 && 3177 adapter->pdev->subsystem_vendor == PCI_VENDOR_ID_DELL && 3178 adapter->pdev->subsystem_device == PCI_SUBSYS_ID_CERC_ATA100_4CH && 3179 (adapter->fw_version[0] > '6' || 3180 (adapter->fw_version[0] == '6' && 3181 adapter->fw_version[2] > '6') || 3182 (adapter->fw_version[0] == '6' 3183 && adapter->fw_version[2] == '6' 3184 && adapter->fw_version[3] > '1'))) { 3185 con_log(CL_DLEVEL1, ("megaraid: disable random deletion\n")); 3186 return 0; 3187 } 3188 3189 mbox = (mbox_t *)raw_mbox; 3190 3191 memset((caddr_t)raw_mbox, 0, sizeof(mbox_t)); 3192 3193 raw_mbox[0] = FC_DEL_LOGDRV; 3194 raw_mbox[2] = OP_SUP_DEL_LOGDRV; 3195 3196 // Issue the command 3197 rval = 0; 3198 if (mbox_post_sync_cmd(adapter, raw_mbox) == 0) { 3199 3200 con_log(CL_DLEVEL1, ("megaraid: supports random deletion\n")); 3201 3202 rval = 1; 3203 } 3204 3205 return rval; 3206 } 3207 3208 3209 /** 3210 * megaraid_mbox_get_max_sg - maximum sg elements supported by the firmware 3211 * @adapter : soft state for the controller 3212 * 3213 * Find out the maximum number of scatter-gather elements supported by the 3214 * firmware. 3215 */ 3216 static int 3217 megaraid_mbox_get_max_sg(adapter_t *adapter) 3218 { 3219 mbox_t *mbox; 3220 uint8_t raw_mbox[sizeof(mbox_t)]; 3221 int nsg; 3222 3223 3224 mbox = (mbox_t *)raw_mbox; 3225 3226 memset((caddr_t)raw_mbox, 0, sizeof(mbox_t)); 3227 3228 mbox->xferaddr = (uint32_t)adapter->ibuf_dma_h; 3229 3230 memset((void *)adapter->ibuf, 0, MBOX_IBUF_SIZE); 3231 3232 raw_mbox[0] = MAIN_MISC_OPCODE; 3233 raw_mbox[2] = GET_MAX_SG_SUPPORT; 3234 3235 // Issue the command 3236 if (mbox_post_sync_cmd(adapter, raw_mbox) == 0) { 3237 nsg = *(uint8_t *)adapter->ibuf; 3238 } 3239 else { 3240 nsg = MBOX_DEFAULT_SG_SIZE; 3241 } 3242 3243 if (nsg > MBOX_MAX_SG_SIZE) nsg = MBOX_MAX_SG_SIZE; 3244 3245 return nsg; 3246 } 3247 3248 3249 /** 3250 * megaraid_mbox_enum_raid_scsi - enumerate the RAID and SCSI channels 3251 * @adapter : soft state for the controller 3252 * 3253 * Enumerate the RAID and SCSI channels for ROMB platforms so that channels 3254 * can be exported as regular SCSI channels. 3255 */ 3256 static void 3257 megaraid_mbox_enum_raid_scsi(adapter_t *adapter) 3258 { 3259 mraid_device_t *raid_dev = ADAP2RAIDDEV(adapter); 3260 mbox_t *mbox; 3261 uint8_t raw_mbox[sizeof(mbox_t)]; 3262 3263 3264 mbox = (mbox_t *)raw_mbox; 3265 3266 memset((caddr_t)raw_mbox, 0, sizeof(mbox_t)); 3267 3268 mbox->xferaddr = (uint32_t)adapter->ibuf_dma_h; 3269 3270 memset((void *)adapter->ibuf, 0, MBOX_IBUF_SIZE); 3271 3272 raw_mbox[0] = CHNL_CLASS; 3273 raw_mbox[2] = GET_CHNL_CLASS; 3274 3275 // Issue the command. If the command fails, all channels are RAID 3276 // channels 3277 raid_dev->channel_class = 0xFF; 3278 if (mbox_post_sync_cmd(adapter, raw_mbox) == 0) { 3279 raid_dev->channel_class = *(uint8_t *)adapter->ibuf; 3280 } 3281 3282 return; 3283 } 3284 3285 3286 /** 3287 * megaraid_mbox_flush_cache - flush adapter and disks cache 3288 * @adapter : soft state for the controller 3289 * 3290 * Flush adapter cache followed by disks cache. 3291 */ 3292 static void 3293 megaraid_mbox_flush_cache(adapter_t *adapter) 3294 { 3295 mbox_t *mbox; 3296 uint8_t raw_mbox[sizeof(mbox_t)]; 3297 3298 3299 mbox = (mbox_t *)raw_mbox; 3300 3301 memset((caddr_t)raw_mbox, 0, sizeof(mbox_t)); 3302 3303 raw_mbox[0] = FLUSH_ADAPTER; 3304 3305 if (mbox_post_sync_cmd(adapter, raw_mbox) != 0) { 3306 con_log(CL_ANN, ("megaraid: flush adapter failed\n")); 3307 } 3308 3309 raw_mbox[0] = FLUSH_SYSTEM; 3310 3311 if (mbox_post_sync_cmd(adapter, raw_mbox) != 0) { 3312 con_log(CL_ANN, ("megaraid: flush disks cache failed\n")); 3313 } 3314 3315 return; 3316 } 3317 3318 3319 /** 3320 * megaraid_mbox_fire_sync_cmd - fire the sync cmd 3321 * @adapter : soft state for the controller 3322 * 3323 * Clears the pending cmds in FW and reinits its RAID structs. 3324 */ 3325 static int 3326 megaraid_mbox_fire_sync_cmd(adapter_t *adapter) 3327 { 3328 mbox_t *mbox; 3329 uint8_t raw_mbox[sizeof(mbox_t)]; 3330 mraid_device_t *raid_dev = ADAP2RAIDDEV(adapter); 3331 mbox64_t *mbox64; 3332 int status = 0; 3333 int i; 3334 uint32_t dword; 3335 3336 mbox = (mbox_t *)raw_mbox; 3337 3338 memset((caddr_t)raw_mbox, 0, sizeof(mbox_t)); 3339 3340 raw_mbox[0] = 0xFF; 3341 3342 mbox64 = raid_dev->mbox64; 3343 mbox = raid_dev->mbox; 3344 3345 /* Wait until mailbox is free */ 3346 if (megaraid_busywait_mbox(raid_dev) != 0) { 3347 status = 1; 3348 goto blocked_mailbox; 3349 } 3350 3351 /* Copy mailbox data into host structure */ 3352 memcpy((caddr_t)mbox, (caddr_t)raw_mbox, 16); 3353 mbox->cmdid = 0xFE; 3354 mbox->busy = 1; 3355 mbox->poll = 0; 3356 mbox->ack = 0; 3357 mbox->numstatus = 0; 3358 mbox->status = 0; 3359 3360 wmb(); 3361 WRINDOOR(raid_dev, raid_dev->mbox_dma | 0x1); 3362 3363 /* Wait for maximum 1 min for status to post. 3364 * If the Firmware SUPPORTS the ABOVE COMMAND, 3365 * mbox->cmd will be set to 0 3366 * else 3367 * the firmware will reject the command with 3368 * mbox->numstatus set to 1 3369 */ 3370 3371 i = 0; 3372 status = 0; 3373 while (!mbox->numstatus && mbox->cmd == 0xFF) { 3374 rmb(); 3375 msleep(1); 3376 i++; 3377 if (i > 1000 * 60) { 3378 status = 1; 3379 break; 3380 } 3381 } 3382 if (mbox->numstatus == 1) 3383 status = 1; /*cmd not supported*/ 3384 3385 /* Check for interrupt line */ 3386 dword = RDOUTDOOR(raid_dev); 3387 WROUTDOOR(raid_dev, dword); 3388 WRINDOOR(raid_dev,2); 3389 3390 return status; 3391 3392 blocked_mailbox: 3393 con_log(CL_ANN, (KERN_WARNING "megaraid: blocked mailbox\n")); 3394 return status; 3395 } 3396 3397 /** 3398 * megaraid_mbox_display_scb - display SCB information, mostly debug purposes 3399 * @adapter : controller's soft state 3400 * @scb : SCB to be displayed 3401 * @level : debug level for console print 3402 * 3403 * Diplay information about the given SCB iff the current debug level is 3404 * verbose. 3405 */ 3406 static void 3407 megaraid_mbox_display_scb(adapter_t *adapter, scb_t *scb) 3408 { 3409 mbox_ccb_t *ccb; 3410 struct scsi_cmnd *scp; 3411 mbox_t *mbox; 3412 int level; 3413 int i; 3414 3415 3416 ccb = (mbox_ccb_t *)scb->ccb; 3417 scp = scb->scp; 3418 mbox = ccb->mbox; 3419 3420 level = CL_DLEVEL3; 3421 3422 con_log(level, (KERN_NOTICE 3423 "megaraid mailbox: status:%#x cmd:%#x id:%#x ", scb->status, 3424 mbox->cmd, scb->sno)); 3425 3426 con_log(level, ("sec:%#x lba:%#x addr:%#x ld:%d sg:%d\n", 3427 mbox->numsectors, mbox->lba, mbox->xferaddr, mbox->logdrv, 3428 mbox->numsge)); 3429 3430 if (!scp) return; 3431 3432 con_log(level, (KERN_NOTICE "scsi cmnd: ")); 3433 3434 for (i = 0; i < scp->cmd_len; i++) { 3435 con_log(level, ("%#2.02x ", scp->cmnd[i])); 3436 } 3437 3438 con_log(level, ("\n")); 3439 3440 return; 3441 } 3442 3443 3444 /** 3445 * megaraid_mbox_setup_device_map - manage device ids 3446 * @adapter : Driver's soft state 3447 * 3448 * Manange the device ids to have an appropraite mapping between the kernel 3449 * scsi addresses and megaraid scsi and logical drive addresses. We export 3450 * scsi devices on their actual addresses, whereas the logical drives are 3451 * exported on a virtual scsi channel. 3452 */ 3453 static void 3454 megaraid_mbox_setup_device_map(adapter_t *adapter) 3455 { 3456 uint8_t c; 3457 uint8_t t; 3458 3459 /* 3460 * First fill the values on the logical drive channel 3461 */ 3462 for (t = 0; t < LSI_MAX_LOGICAL_DRIVES_64LD; t++) 3463 adapter->device_ids[adapter->max_channel][t] = 3464 (t < adapter->init_id) ? t : t - 1; 3465 3466 adapter->device_ids[adapter->max_channel][adapter->init_id] = 0xFF; 3467 3468 /* 3469 * Fill the values on the physical devices channels 3470 */ 3471 for (c = 0; c < adapter->max_channel; c++) 3472 for (t = 0; t < LSI_MAX_LOGICAL_DRIVES_64LD; t++) 3473 adapter->device_ids[c][t] = (c << 8) | t; 3474 } 3475 3476 3477 /* 3478 * END: internal commands library 3479 */ 3480 3481 /* 3482 * START: Interface for the common management module 3483 * 3484 * This is the module, which interfaces with the common management module to 3485 * provide support for ioctl and sysfs 3486 */ 3487 3488 /** 3489 * megaraid_cmm_register - register with the management module 3490 * @adapter : HBA soft state 3491 * 3492 * Register with the management module, which allows applications to issue 3493 * ioctl calls to the drivers. This interface is used by the management module 3494 * to setup sysfs support as well. 3495 */ 3496 static int 3497 megaraid_cmm_register(adapter_t *adapter) 3498 { 3499 mraid_device_t *raid_dev = ADAP2RAIDDEV(adapter); 3500 mraid_mmadp_t adp; 3501 scb_t *scb; 3502 mbox_ccb_t *ccb; 3503 int rval; 3504 int i; 3505 3506 // Allocate memory for the base list of scb for management module. 3507 adapter->uscb_list = kcalloc(MBOX_MAX_USER_CMDS, sizeof(scb_t), GFP_KERNEL); 3508 3509 if (adapter->uscb_list == NULL) { 3510 con_log(CL_ANN, (KERN_WARNING 3511 "megaraid: out of memory, %s %d\n", __FUNCTION__, 3512 __LINE__)); 3513 return -1; 3514 } 3515 3516 3517 // Initialize the synchronization parameters for resources for 3518 // commands for management module 3519 INIT_LIST_HEAD(&adapter->uscb_pool); 3520 3521 spin_lock_init(USER_FREE_LIST_LOCK(adapter)); 3522 3523 3524 3525 // link all the packets. Note, CCB for commands, coming from the 3526 // commom management module, mailbox physical address are already 3527 // setup by it. We just need placeholder for that in our local command 3528 // control blocks 3529 for (i = 0; i < MBOX_MAX_USER_CMDS; i++) { 3530 3531 scb = adapter->uscb_list + i; 3532 ccb = raid_dev->uccb_list + i; 3533 3534 scb->ccb = (caddr_t)ccb; 3535 ccb->mbox64 = raid_dev->umbox64 + i; 3536 ccb->mbox = &ccb->mbox64->mbox32; 3537 ccb->raw_mbox = (uint8_t *)ccb->mbox; 3538 3539 scb->gp = 0; 3540 3541 // COMMAND ID 0 - (MBOX_MAX_SCSI_CMDS-1) ARE RESERVED FOR 3542 // COMMANDS COMING FROM IO SUBSYSTEM (MID-LAYER) 3543 scb->sno = i + MBOX_MAX_SCSI_CMDS; 3544 3545 scb->scp = NULL; 3546 scb->state = SCB_FREE; 3547 scb->dma_direction = PCI_DMA_NONE; 3548 scb->dma_type = MRAID_DMA_NONE; 3549 scb->dev_channel = -1; 3550 scb->dev_target = -1; 3551 3552 // put scb in the free pool 3553 list_add_tail(&scb->list, &adapter->uscb_pool); 3554 } 3555 3556 adp.unique_id = adapter->unique_id; 3557 adp.drvr_type = DRVRTYPE_MBOX; 3558 adp.drvr_data = (unsigned long)adapter; 3559 adp.pdev = adapter->pdev; 3560 adp.issue_uioc = megaraid_mbox_mm_handler; 3561 adp.timeout = MBOX_RESET_WAIT + MBOX_RESET_EXT_WAIT; 3562 adp.max_kioc = MBOX_MAX_USER_CMDS; 3563 3564 if ((rval = mraid_mm_register_adp(&adp)) != 0) { 3565 3566 con_log(CL_ANN, (KERN_WARNING 3567 "megaraid mbox: did not register with CMM\n")); 3568 3569 kfree(adapter->uscb_list); 3570 } 3571 3572 return rval; 3573 } 3574 3575 3576 /** 3577 * megaraid_cmm_unregister - un-register with the management module 3578 * @adapter : HBA soft state 3579 * 3580 * Un-register with the management module. 3581 * FIXME: mgmt module must return failure for unregister if it has pending 3582 * commands in LLD. 3583 */ 3584 static int 3585 megaraid_cmm_unregister(adapter_t *adapter) 3586 { 3587 kfree(adapter->uscb_list); 3588 mraid_mm_unregister_adp(adapter->unique_id); 3589 return 0; 3590 } 3591 3592 3593 /** 3594 * megaraid_mbox_mm_handler - interface for CMM to issue commands to LLD 3595 * @drvr_data : LLD specific data 3596 * @kioc : CMM interface packet 3597 * @action : command action 3598 * 3599 * This routine is invoked whenever the Common Management Module (CMM) has a 3600 * command for us. The 'action' parameter specifies if this is a new command 3601 * or otherwise. 3602 */ 3603 static int 3604 megaraid_mbox_mm_handler(unsigned long drvr_data, uioc_t *kioc, uint32_t action) 3605 { 3606 adapter_t *adapter; 3607 3608 if (action != IOCTL_ISSUE) { 3609 con_log(CL_ANN, (KERN_WARNING 3610 "megaraid: unsupported management action:%#2x\n", 3611 action)); 3612 return (-ENOTSUPP); 3613 } 3614 3615 adapter = (adapter_t *)drvr_data; 3616 3617 // make sure this adapter is not being detached right now. 3618 if (atomic_read(&adapter->being_detached)) { 3619 con_log(CL_ANN, (KERN_WARNING 3620 "megaraid: reject management request, detaching\n")); 3621 return (-ENODEV); 3622 } 3623 3624 switch (kioc->opcode) { 3625 3626 case GET_ADAP_INFO: 3627 3628 kioc->status = gather_hbainfo(adapter, (mraid_hba_info_t *) 3629 (unsigned long)kioc->buf_vaddr); 3630 3631 kioc->done(kioc); 3632 3633 return kioc->status; 3634 3635 case MBOX_CMD: 3636 3637 return megaraid_mbox_mm_command(adapter, kioc); 3638 3639 default: 3640 kioc->status = (-EINVAL); 3641 kioc->done(kioc); 3642 return (-EINVAL); 3643 } 3644 3645 return 0; // not reached 3646 } 3647 3648 /** 3649 * megaraid_mbox_mm_command - issues commands routed through CMM 3650 * @adapter : HBA soft state 3651 * @kioc : management command packet 3652 * 3653 * Issues commands, which are routed through the management module. 3654 */ 3655 static int 3656 megaraid_mbox_mm_command(adapter_t *adapter, uioc_t *kioc) 3657 { 3658 struct list_head *head = &adapter->uscb_pool; 3659 mbox64_t *mbox64; 3660 uint8_t *raw_mbox; 3661 scb_t *scb; 3662 mbox_ccb_t *ccb; 3663 unsigned long flags; 3664 3665 // detach one scb from free pool 3666 spin_lock_irqsave(USER_FREE_LIST_LOCK(adapter), flags); 3667 3668 if (list_empty(head)) { // should never happen because of CMM 3669 3670 con_log(CL_ANN, (KERN_WARNING 3671 "megaraid mbox: bug in cmm handler, lost resources\n")); 3672 3673 spin_unlock_irqrestore(USER_FREE_LIST_LOCK(adapter), flags); 3674 3675 return (-EINVAL); 3676 } 3677 3678 scb = list_entry(head->next, scb_t, list); 3679 list_del_init(&scb->list); 3680 3681 spin_unlock_irqrestore(USER_FREE_LIST_LOCK(adapter), flags); 3682 3683 scb->state = SCB_ACTIVE; 3684 scb->dma_type = MRAID_DMA_NONE; 3685 scb->dma_direction = PCI_DMA_NONE; 3686 3687 ccb = (mbox_ccb_t *)scb->ccb; 3688 mbox64 = (mbox64_t *)(unsigned long)kioc->cmdbuf; 3689 raw_mbox = (uint8_t *)&mbox64->mbox32; 3690 3691 memcpy(ccb->mbox64, mbox64, sizeof(mbox64_t)); 3692 3693 scb->gp = (unsigned long)kioc; 3694 3695 /* 3696 * If it is a logdrv random delete operation, we have to wait till 3697 * there are no outstanding cmds at the fw and then issue it directly 3698 */ 3699 if (raw_mbox[0] == FC_DEL_LOGDRV && raw_mbox[2] == OP_DEL_LOGDRV) { 3700 3701 if (wait_till_fw_empty(adapter)) { 3702 con_log(CL_ANN, (KERN_NOTICE 3703 "megaraid mbox: LD delete, timed out\n")); 3704 3705 kioc->status = -ETIME; 3706 3707 scb->status = -1; 3708 3709 megaraid_mbox_mm_done(adapter, scb); 3710 3711 return (-ETIME); 3712 } 3713 3714 INIT_LIST_HEAD(&scb->list); 3715 3716 scb->state = SCB_ISSUED; 3717 if (mbox_post_cmd(adapter, scb) != 0) { 3718 3719 con_log(CL_ANN, (KERN_NOTICE 3720 "megaraid mbox: LD delete, mailbox busy\n")); 3721 3722 kioc->status = -EBUSY; 3723 3724 scb->status = -1; 3725 3726 megaraid_mbox_mm_done(adapter, scb); 3727 3728 return (-EBUSY); 3729 } 3730 3731 return 0; 3732 } 3733 3734 // put the command on the pending list and execute 3735 megaraid_mbox_runpendq(adapter, scb); 3736 3737 return 0; 3738 } 3739 3740 3741 static int 3742 wait_till_fw_empty(adapter_t *adapter) 3743 { 3744 unsigned long flags = 0; 3745 int i; 3746 3747 3748 /* 3749 * Set the quiescent flag to stop issuing cmds to FW. 3750 */ 3751 spin_lock_irqsave(&adapter->lock, flags); 3752 adapter->quiescent++; 3753 spin_unlock_irqrestore(&adapter->lock, flags); 3754 3755 /* 3756 * Wait till there are no more cmds outstanding at FW. Try for at most 3757 * 60 seconds 3758 */ 3759 for (i = 0; i < 60 && adapter->outstanding_cmds; i++) { 3760 con_log(CL_DLEVEL1, (KERN_INFO 3761 "megaraid: FW has %d pending commands\n", 3762 adapter->outstanding_cmds)); 3763 3764 msleep(1000); 3765 } 3766 3767 return adapter->outstanding_cmds; 3768 } 3769 3770 3771 /** 3772 * megaraid_mbox_mm_done - callback for CMM commands 3773 * @adapter : HBA soft state 3774 * @scb : completed command 3775 * 3776 * Callback routine for internal commands originated from the management 3777 * module. 3778 */ 3779 static void 3780 megaraid_mbox_mm_done(adapter_t *adapter, scb_t *scb) 3781 { 3782 uioc_t *kioc; 3783 mbox64_t *mbox64; 3784 uint8_t *raw_mbox; 3785 unsigned long flags; 3786 3787 kioc = (uioc_t *)scb->gp; 3788 mbox64 = (mbox64_t *)(unsigned long)kioc->cmdbuf; 3789 mbox64->mbox32.status = scb->status; 3790 raw_mbox = (uint8_t *)&mbox64->mbox32; 3791 3792 3793 // put scb in the free pool 3794 scb->state = SCB_FREE; 3795 scb->scp = NULL; 3796 3797 spin_lock_irqsave(USER_FREE_LIST_LOCK(adapter), flags); 3798 3799 list_add(&scb->list, &adapter->uscb_pool); 3800 3801 spin_unlock_irqrestore(USER_FREE_LIST_LOCK(adapter), flags); 3802 3803 // if a delete logical drive operation succeeded, restart the 3804 // controller 3805 if (raw_mbox[0] == FC_DEL_LOGDRV && raw_mbox[2] == OP_DEL_LOGDRV) { 3806 3807 adapter->quiescent--; 3808 3809 megaraid_mbox_runpendq(adapter, NULL); 3810 } 3811 3812 kioc->done(kioc); 3813 3814 return; 3815 } 3816 3817 3818 /** 3819 * gather_hbainfo - HBA characteristics for the applications 3820 * @adapter : HBA soft state 3821 * @hinfo : pointer to the caller's host info strucuture 3822 */ 3823 static int 3824 gather_hbainfo(adapter_t *adapter, mraid_hba_info_t *hinfo) 3825 { 3826 uint8_t dmajor; 3827 3828 dmajor = megaraid_mbox_version[0]; 3829 3830 hinfo->pci_vendor_id = adapter->pdev->vendor; 3831 hinfo->pci_device_id = adapter->pdev->device; 3832 hinfo->subsys_vendor_id = adapter->pdev->subsystem_vendor; 3833 hinfo->subsys_device_id = adapter->pdev->subsystem_device; 3834 3835 hinfo->pci_bus = adapter->pdev->bus->number; 3836 hinfo->pci_dev_fn = adapter->pdev->devfn; 3837 hinfo->pci_slot = PCI_SLOT(adapter->pdev->devfn); 3838 hinfo->irq = adapter->host->irq; 3839 hinfo->baseport = ADAP2RAIDDEV(adapter)->baseport; 3840 3841 hinfo->unique_id = (hinfo->pci_bus << 8) | adapter->pdev->devfn; 3842 hinfo->host_no = adapter->host->host_no; 3843 3844 return 0; 3845 } 3846 3847 /* 3848 * END: Interface for the common management module 3849 */ 3850 3851 3852 3853 /** 3854 * megaraid_sysfs_alloc_resources - allocate sysfs related resources 3855 * @adapter : controller's soft state 3856 * 3857 * Allocate packets required to issue FW calls whenever the sysfs attributes 3858 * are read. These attributes would require up-to-date information from the 3859 * FW. Also set up resources for mutual exclusion to share these resources and 3860 * the wait queue. 3861 * 3862 * Return 0 on success. 3863 * Return -ERROR_CODE on failure. 3864 */ 3865 static int 3866 megaraid_sysfs_alloc_resources(adapter_t *adapter) 3867 { 3868 mraid_device_t *raid_dev = ADAP2RAIDDEV(adapter); 3869 int rval = 0; 3870 3871 raid_dev->sysfs_uioc = kmalloc(sizeof(uioc_t), GFP_KERNEL); 3872 3873 raid_dev->sysfs_mbox64 = kmalloc(sizeof(mbox64_t), GFP_KERNEL); 3874 3875 raid_dev->sysfs_buffer = pci_alloc_consistent(adapter->pdev, 3876 PAGE_SIZE, &raid_dev->sysfs_buffer_dma); 3877 3878 if (!raid_dev->sysfs_uioc || !raid_dev->sysfs_mbox64 || 3879 !raid_dev->sysfs_buffer) { 3880 3881 con_log(CL_ANN, (KERN_WARNING 3882 "megaraid: out of memory, %s %d\n", __FUNCTION__, 3883 __LINE__)); 3884 3885 rval = -ENOMEM; 3886 3887 megaraid_sysfs_free_resources(adapter); 3888 } 3889 3890 mutex_init(&raid_dev->sysfs_mtx); 3891 3892 init_waitqueue_head(&raid_dev->sysfs_wait_q); 3893 3894 return rval; 3895 } 3896 3897 3898 /** 3899 * megaraid_sysfs_free_resources - free sysfs related resources 3900 * @adapter : controller's soft state 3901 * 3902 * Free packets allocated for sysfs FW commands 3903 */ 3904 static void 3905 megaraid_sysfs_free_resources(adapter_t *adapter) 3906 { 3907 mraid_device_t *raid_dev = ADAP2RAIDDEV(adapter); 3908 3909 kfree(raid_dev->sysfs_uioc); 3910 kfree(raid_dev->sysfs_mbox64); 3911 3912 if (raid_dev->sysfs_buffer) { 3913 pci_free_consistent(adapter->pdev, PAGE_SIZE, 3914 raid_dev->sysfs_buffer, raid_dev->sysfs_buffer_dma); 3915 } 3916 } 3917 3918 3919 /** 3920 * megaraid_sysfs_get_ldmap_done - callback for get ldmap 3921 * @uioc : completed packet 3922 * 3923 * Callback routine called in the ISR/tasklet context for get ldmap call 3924 */ 3925 static void 3926 megaraid_sysfs_get_ldmap_done(uioc_t *uioc) 3927 { 3928 adapter_t *adapter = (adapter_t *)uioc->buf_vaddr; 3929 mraid_device_t *raid_dev = ADAP2RAIDDEV(adapter); 3930 3931 uioc->status = 0; 3932 3933 wake_up(&raid_dev->sysfs_wait_q); 3934 } 3935 3936 3937 /** 3938 * megaraid_sysfs_get_ldmap_timeout - timeout handling for get ldmap 3939 * @data : timed out packet 3940 * 3941 * Timeout routine to recover and return to application, in case the adapter 3942 * has stopped responding. A timeout of 60 seconds for this command seems like 3943 * a good value. 3944 */ 3945 static void 3946 megaraid_sysfs_get_ldmap_timeout(unsigned long data) 3947 { 3948 uioc_t *uioc = (uioc_t *)data; 3949 adapter_t *adapter = (adapter_t *)uioc->buf_vaddr; 3950 mraid_device_t *raid_dev = ADAP2RAIDDEV(adapter); 3951 3952 uioc->status = -ETIME; 3953 3954 wake_up(&raid_dev->sysfs_wait_q); 3955 } 3956 3957 3958 /** 3959 * megaraid_sysfs_get_ldmap - get update logical drive map 3960 * @adapter : controller's soft state 3961 * 3962 * This routine will be called whenever user reads the logical drive 3963 * attributes, go get the current logical drive mapping table from the 3964 * firmware. We use the management API's to issue commands to the controller. 3965 * 3966 * NOTE: The commands issuance functionality is not generalized and 3967 * implemented in context of "get ld map" command only. If required, the 3968 * command issuance logical can be trivially pulled out and implemented as a 3969 * standalone libary. For now, this should suffice since there is no other 3970 * user of this interface. 3971 * 3972 * Return 0 on success. 3973 * Return -1 on failure. 3974 */ 3975 static int 3976 megaraid_sysfs_get_ldmap(adapter_t *adapter) 3977 { 3978 mraid_device_t *raid_dev = ADAP2RAIDDEV(adapter); 3979 uioc_t *uioc; 3980 mbox64_t *mbox64; 3981 mbox_t *mbox; 3982 char *raw_mbox; 3983 struct timer_list sysfs_timer; 3984 struct timer_list *timerp; 3985 caddr_t ldmap; 3986 int rval = 0; 3987 3988 /* 3989 * Allow only one read at a time to go through the sysfs attributes 3990 */ 3991 mutex_lock(&raid_dev->sysfs_mtx); 3992 3993 uioc = raid_dev->sysfs_uioc; 3994 mbox64 = raid_dev->sysfs_mbox64; 3995 ldmap = raid_dev->sysfs_buffer; 3996 3997 memset(uioc, 0, sizeof(uioc_t)); 3998 memset(mbox64, 0, sizeof(mbox64_t)); 3999 memset(ldmap, 0, sizeof(raid_dev->curr_ldmap)); 4000 4001 mbox = &mbox64->mbox32; 4002 raw_mbox = (char *)mbox; 4003 uioc->cmdbuf = (uint64_t)(unsigned long)mbox64; 4004 uioc->buf_vaddr = (caddr_t)adapter; 4005 uioc->status = -ENODATA; 4006 uioc->done = megaraid_sysfs_get_ldmap_done; 4007 4008 /* 4009 * Prepare the mailbox packet to get the current logical drive mapping 4010 * table 4011 */ 4012 mbox->xferaddr = (uint32_t)raid_dev->sysfs_buffer_dma; 4013 4014 raw_mbox[0] = FC_DEL_LOGDRV; 4015 raw_mbox[2] = OP_GET_LDID_MAP; 4016 4017 /* 4018 * Setup a timer to recover from a non-responding controller 4019 */ 4020 timerp = &sysfs_timer; 4021 init_timer(timerp); 4022 4023 timerp->function = megaraid_sysfs_get_ldmap_timeout; 4024 timerp->data = (unsigned long)uioc; 4025 timerp->expires = jiffies + 60 * HZ; 4026 4027 add_timer(timerp); 4028 4029 /* 4030 * Send the command to the firmware 4031 */ 4032 rval = megaraid_mbox_mm_command(adapter, uioc); 4033 4034 if (rval == 0) { // command successfully issued 4035 wait_event(raid_dev->sysfs_wait_q, (uioc->status != -ENODATA)); 4036 4037 /* 4038 * Check if the command timed out 4039 */ 4040 if (uioc->status == -ETIME) { 4041 con_log(CL_ANN, (KERN_NOTICE 4042 "megaraid: sysfs get ld map timed out\n")); 4043 4044 rval = -ETIME; 4045 } 4046 else { 4047 rval = mbox->status; 4048 } 4049 4050 if (rval == 0) { 4051 memcpy(raid_dev->curr_ldmap, ldmap, 4052 sizeof(raid_dev->curr_ldmap)); 4053 } 4054 else { 4055 con_log(CL_ANN, (KERN_NOTICE 4056 "megaraid: get ld map failed with %x\n", rval)); 4057 } 4058 } 4059 else { 4060 con_log(CL_ANN, (KERN_NOTICE 4061 "megaraid: could not issue ldmap command:%x\n", rval)); 4062 } 4063 4064 4065 del_timer_sync(timerp); 4066 4067 mutex_unlock(&raid_dev->sysfs_mtx); 4068 4069 return rval; 4070 } 4071 4072 4073 /** 4074 * megaraid_sysfs_show_app_hndl - display application handle for this adapter 4075 * @cdev : class device object representation for the host 4076 * @buf : buffer to send data to 4077 * 4078 * Display the handle used by the applications while executing management 4079 * tasks on the adapter. We invoke a management module API to get the adapter 4080 * handle, since we do not interface with applications directly. 4081 */ 4082 static ssize_t 4083 megaraid_sysfs_show_app_hndl(struct device *dev, struct device_attribute *attr, 4084 char *buf) 4085 { 4086 struct Scsi_Host *shost = class_to_shost(dev); 4087 adapter_t *adapter = (adapter_t *)SCSIHOST2ADAP(shost); 4088 uint32_t app_hndl; 4089 4090 app_hndl = mraid_mm_adapter_app_handle(adapter->unique_id); 4091 4092 return snprintf(buf, 8, "%u\n", app_hndl); 4093 } 4094 4095 4096 /** 4097 * megaraid_sysfs_show_ldnum - display the logical drive number for this device 4098 * @dev : device object representation for the scsi device 4099 * @attr : device attribute to show 4100 * @buf : buffer to send data to 4101 * 4102 * Display the logical drive number for the device in question, if it a valid 4103 * logical drive. For physical devices, "-1" is returned. 4104 * 4105 * The logical drive number is displayed in following format: 4106 * 4107 * <SCSI ID> <LD NUM> <LD STICKY ID> <APP ADAPTER HANDLE> 4108 * 4109 * <int> <int> <int> <int> 4110 */ 4111 static ssize_t 4112 megaraid_sysfs_show_ldnum(struct device *dev, struct device_attribute *attr, char *buf) 4113 { 4114 struct scsi_device *sdev = to_scsi_device(dev); 4115 adapter_t *adapter = (adapter_t *)SCSIHOST2ADAP(sdev->host); 4116 mraid_device_t *raid_dev = ADAP2RAIDDEV(adapter); 4117 int scsi_id = -1; 4118 int logical_drv = -1; 4119 int ldid_map = -1; 4120 uint32_t app_hndl = 0; 4121 int mapped_sdev_id; 4122 int rval; 4123 int i; 4124 4125 if (raid_dev->random_del_supported && 4126 MRAID_IS_LOGICAL_SDEV(adapter, sdev)) { 4127 4128 rval = megaraid_sysfs_get_ldmap(adapter); 4129 if (rval == 0) { 4130 4131 for (i = 0; i < MAX_LOGICAL_DRIVES_40LD; i++) { 4132 4133 mapped_sdev_id = sdev->id; 4134 4135 if (sdev->id > adapter->init_id) { 4136 mapped_sdev_id -= 1; 4137 } 4138 4139 if (raid_dev->curr_ldmap[i] == mapped_sdev_id) { 4140 4141 scsi_id = sdev->id; 4142 4143 logical_drv = i; 4144 4145 ldid_map = raid_dev->curr_ldmap[i]; 4146 4147 app_hndl = mraid_mm_adapter_app_handle( 4148 adapter->unique_id); 4149 4150 break; 4151 } 4152 } 4153 } 4154 else { 4155 con_log(CL_ANN, (KERN_NOTICE 4156 "megaraid: sysfs get ld map failed: %x\n", 4157 rval)); 4158 } 4159 } 4160 4161 return snprintf(buf, 36, "%d %d %d %d\n", scsi_id, logical_drv, 4162 ldid_map, app_hndl); 4163 } 4164 4165 4166 /* 4167 * END: Mailbox Low Level Driver 4168 */ 4169 module_init(megaraid_init); 4170 module_exit(megaraid_exit); 4171 4172 /* vim: set ts=8 sw=8 tw=78 ai si: */ 4173