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