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 pci_set_drvdata(pdev, NULL); 538 megaraid_cmm_unregister(adapter); 539 out_fini_mbox: 540 megaraid_fini_mbox(adapter); 541 out_free_adapter: 542 kfree(adapter); 543 out_probe_one: 544 pci_disable_device(pdev); 545 546 return -ENODEV; 547 } 548 549 550 /** 551 * megaraid_detach_one - release framework resources and call LLD release routine 552 * @pdev : handle for our PCI cofiguration space 553 * 554 * This routine is called during driver unload. We free all the allocated 555 * resources and call the corresponding LLD so that it can also release all 556 * its resources. 557 * 558 * This routine is also called from the PCI hotplug system. 559 */ 560 static void 561 megaraid_detach_one(struct pci_dev *pdev) 562 { 563 adapter_t *adapter; 564 struct Scsi_Host *host; 565 566 567 // Start a rollback on this adapter 568 adapter = pci_get_drvdata(pdev); 569 570 if (!adapter) { 571 con_log(CL_ANN, (KERN_CRIT 572 "megaraid: Invalid detach on %#4.04x:%#4.04x:%#4.04x:%#4.04x\n", 573 pdev->vendor, pdev->device, pdev->subsystem_vendor, 574 pdev->subsystem_device)); 575 576 return; 577 } 578 else { 579 con_log(CL_ANN, (KERN_NOTICE 580 "megaraid: detaching device %#4.04x:%#4.04x:%#4.04x:%#4.04x\n", 581 pdev->vendor, pdev->device, pdev->subsystem_vendor, 582 pdev->subsystem_device)); 583 } 584 585 586 host = adapter->host; 587 588 // do not allow any more requests from the management module for this 589 // adapter. 590 // FIXME: How do we account for the request which might still be 591 // pending with us? 592 atomic_set(&adapter->being_detached, 1); 593 594 // detach from the IO sub-system 595 megaraid_io_detach(adapter); 596 597 // reset the device state in the PCI structure. We check this 598 // condition when we enter here. If the device state is NULL, 599 // that would mean the device has already been removed 600 pci_set_drvdata(pdev, NULL); 601 602 // Unregister from common management module 603 // 604 // FIXME: this must return success or failure for conditions if there 605 // is a command pending with LLD or not. 606 megaraid_cmm_unregister(adapter); 607 608 // finalize the mailbox based controller and release all resources 609 megaraid_fini_mbox(adapter); 610 611 kfree(adapter); 612 613 scsi_host_put(host); 614 615 pci_disable_device(pdev); 616 617 return; 618 } 619 620 621 /** 622 * megaraid_mbox_shutdown - PCI shutdown for megaraid HBA 623 * @pdev : generic driver model device 624 * 625 * Shutdown notification, perform flush cache. 626 */ 627 static void 628 megaraid_mbox_shutdown(struct pci_dev *pdev) 629 { 630 adapter_t *adapter = pci_get_drvdata(pdev); 631 static int counter; 632 633 if (!adapter) { 634 con_log(CL_ANN, (KERN_WARNING 635 "megaraid: null device in shutdown\n")); 636 return; 637 } 638 639 // flush caches now 640 con_log(CL_ANN, (KERN_INFO "megaraid: flushing adapter %d...", 641 counter++)); 642 643 megaraid_mbox_flush_cache(adapter); 644 645 con_log(CL_ANN, ("done\n")); 646 } 647 648 649 /** 650 * megaraid_io_attach - attach a device with the IO subsystem 651 * @adapter : controller's soft state 652 * 653 * Attach this device with the IO subsystem. 654 */ 655 static int 656 megaraid_io_attach(adapter_t *adapter) 657 { 658 struct Scsi_Host *host; 659 660 // Initialize SCSI Host structure 661 host = scsi_host_alloc(&megaraid_template_g, 8); 662 if (!host) { 663 con_log(CL_ANN, (KERN_WARNING 664 "megaraid mbox: scsi_register failed\n")); 665 666 return -1; 667 } 668 669 SCSIHOST2ADAP(host) = (caddr_t)adapter; 670 adapter->host = host; 671 672 host->irq = adapter->irq; 673 host->unique_id = adapter->unique_id; 674 host->can_queue = adapter->max_cmds; 675 host->this_id = adapter->init_id; 676 host->sg_tablesize = adapter->sglen; 677 host->max_sectors = adapter->max_sectors; 678 host->cmd_per_lun = adapter->cmd_per_lun; 679 host->max_channel = adapter->max_channel; 680 host->max_id = adapter->max_target; 681 host->max_lun = adapter->max_lun; 682 683 684 // notify mid-layer about the new controller 685 if (scsi_add_host(host, &adapter->pdev->dev)) { 686 687 con_log(CL_ANN, (KERN_WARNING 688 "megaraid mbox: scsi_add_host failed\n")); 689 690 scsi_host_put(host); 691 692 return -1; 693 } 694 695 scsi_scan_host(host); 696 697 return 0; 698 } 699 700 701 /** 702 * megaraid_io_detach - detach a device from the IO subsystem 703 * @adapter : controller's soft state 704 * 705 * Detach this device from the IO subsystem. 706 */ 707 static void 708 megaraid_io_detach(adapter_t *adapter) 709 { 710 struct Scsi_Host *host; 711 712 con_log(CL_DLEVEL1, (KERN_INFO "megaraid: io detach\n")); 713 714 host = adapter->host; 715 716 scsi_remove_host(host); 717 718 return; 719 } 720 721 722 /* 723 * START: Mailbox Low Level Driver 724 * 725 * This is section specific to the single mailbox based controllers 726 */ 727 728 /** 729 * megaraid_init_mbox - initialize controller 730 * @adapter : our soft state 731 * 732 * - Allocate 16-byte aligned mailbox memory for firmware handshake 733 * - Allocate controller's memory resources 734 * - Find out all initialization data 735 * - Allocate memory required for all the commands 736 * - Use internal library of FW routines, build up complete soft state 737 */ 738 static int 739 megaraid_init_mbox(adapter_t *adapter) 740 { 741 struct pci_dev *pdev; 742 mraid_device_t *raid_dev; 743 int i; 744 uint32_t magic64; 745 746 747 adapter->ito = MBOX_TIMEOUT; 748 pdev = adapter->pdev; 749 750 /* 751 * Allocate and initialize the init data structure for mailbox 752 * controllers 753 */ 754 raid_dev = kzalloc(sizeof(mraid_device_t), GFP_KERNEL); 755 if (raid_dev == NULL) return -1; 756 757 758 /* 759 * Attach the adapter soft state to raid device soft state 760 */ 761 adapter->raid_device = (caddr_t)raid_dev; 762 raid_dev->fast_load = megaraid_fast_load; 763 764 765 // our baseport 766 raid_dev->baseport = pci_resource_start(pdev, 0); 767 768 if (pci_request_regions(pdev, "MegaRAID: LSI Logic Corporation") != 0) { 769 770 con_log(CL_ANN, (KERN_WARNING 771 "megaraid: mem region busy\n")); 772 773 goto out_free_raid_dev; 774 } 775 776 raid_dev->baseaddr = ioremap_nocache(raid_dev->baseport, 128); 777 778 if (!raid_dev->baseaddr) { 779 780 con_log(CL_ANN, (KERN_WARNING 781 "megaraid: could not map hba memory\n") ); 782 783 goto out_release_regions; 784 } 785 786 /* initialize the mutual exclusion lock for the mailbox */ 787 spin_lock_init(&raid_dev->mailbox_lock); 788 789 /* allocate memory required for commands */ 790 if (megaraid_alloc_cmd_packets(adapter) != 0) 791 goto out_iounmap; 792 793 /* 794 * Issue SYNC cmd to flush the pending cmds in the adapter 795 * and initialize its internal state 796 */ 797 798 if (megaraid_mbox_fire_sync_cmd(adapter)) 799 con_log(CL_ANN, ("megaraid: sync cmd failed\n")); 800 801 /* 802 * Setup the rest of the soft state using the library of 803 * FW routines 804 */ 805 806 /* request IRQ and register the interrupt service routine */ 807 if (request_irq(adapter->irq, megaraid_isr, IRQF_SHARED, "megaraid", 808 adapter)) { 809 810 con_log(CL_ANN, (KERN_WARNING 811 "megaraid: Couldn't register IRQ %d!\n", adapter->irq)); 812 goto out_alloc_cmds; 813 814 } 815 816 // Product info 817 if (megaraid_mbox_product_info(adapter) != 0) 818 goto out_free_irq; 819 820 // Do we support extended CDBs 821 adapter->max_cdb_sz = 10; 822 if (megaraid_mbox_extended_cdb(adapter) == 0) { 823 adapter->max_cdb_sz = 16; 824 } 825 826 /* 827 * Do we support cluster environment, if we do, what is the initiator 828 * id. 829 * NOTE: In a non-cluster aware firmware environment, the LLD should 830 * return 7 as initiator id. 831 */ 832 adapter->ha = 0; 833 adapter->init_id = -1; 834 if (megaraid_mbox_support_ha(adapter, &adapter->init_id) == 0) { 835 adapter->ha = 1; 836 } 837 838 /* 839 * Prepare the device ids array to have the mapping between the kernel 840 * device address and megaraid device address. 841 * We export the physical devices on their actual addresses. The 842 * logical drives are exported on a virtual SCSI channel 843 */ 844 megaraid_mbox_setup_device_map(adapter); 845 846 // If the firmware supports random deletion, update the device id map 847 if (megaraid_mbox_support_random_del(adapter)) { 848 849 // Change the logical drives numbers in device_ids array one 850 // slot in device_ids is reserved for target id, that's why 851 // "<=" below 852 for (i = 0; i <= MAX_LOGICAL_DRIVES_40LD; i++) { 853 adapter->device_ids[adapter->max_channel][i] += 0x80; 854 } 855 adapter->device_ids[adapter->max_channel][adapter->init_id] = 856 0xFF; 857 858 raid_dev->random_del_supported = 1; 859 } 860 861 /* 862 * find out the maximum number of scatter-gather elements supported by 863 * this firmware 864 */ 865 adapter->sglen = megaraid_mbox_get_max_sg(adapter); 866 867 // enumerate RAID and SCSI channels so that all devices on SCSI 868 // channels can later be exported, including disk devices 869 megaraid_mbox_enum_raid_scsi(adapter); 870 871 /* 872 * Other parameters required by upper layer 873 * 874 * maximum number of sectors per IO command 875 */ 876 adapter->max_sectors = megaraid_max_sectors; 877 878 /* 879 * number of queued commands per LUN. 880 */ 881 adapter->cmd_per_lun = megaraid_cmd_per_lun; 882 883 /* 884 * Allocate resources required to issue FW calls, when sysfs is 885 * accessed 886 */ 887 if (megaraid_sysfs_alloc_resources(adapter) != 0) 888 goto out_free_irq; 889 890 // Set the DMA mask to 64-bit. All supported controllers as capable of 891 // DMA in this range 892 pci_read_config_dword(adapter->pdev, PCI_CONF_AMISIG64, &magic64); 893 894 if (((magic64 == HBA_SIGNATURE_64_BIT) && 895 ((adapter->pdev->subsystem_device != 896 PCI_SUBSYS_ID_MEGARAID_SATA_150_6) && 897 (adapter->pdev->subsystem_device != 898 PCI_SUBSYS_ID_MEGARAID_SATA_150_4))) || 899 (adapter->pdev->vendor == PCI_VENDOR_ID_LSI_LOGIC && 900 adapter->pdev->device == PCI_DEVICE_ID_VERDE) || 901 (adapter->pdev->vendor == PCI_VENDOR_ID_LSI_LOGIC && 902 adapter->pdev->device == PCI_DEVICE_ID_DOBSON) || 903 (adapter->pdev->vendor == PCI_VENDOR_ID_LSI_LOGIC && 904 adapter->pdev->device == PCI_DEVICE_ID_LINDSAY) || 905 (adapter->pdev->vendor == PCI_VENDOR_ID_DELL && 906 adapter->pdev->device == PCI_DEVICE_ID_PERC4_DI_EVERGLADES) || 907 (adapter->pdev->vendor == PCI_VENDOR_ID_DELL && 908 adapter->pdev->device == PCI_DEVICE_ID_PERC4E_DI_KOBUK)) { 909 if (pci_set_dma_mask(adapter->pdev, DMA_BIT_MASK(64))) { 910 con_log(CL_ANN, (KERN_WARNING 911 "megaraid: DMA mask for 64-bit failed\n")); 912 913 if (pci_set_dma_mask (adapter->pdev, DMA_BIT_MASK(32))) { 914 con_log(CL_ANN, (KERN_WARNING 915 "megaraid: 32-bit DMA mask failed\n")); 916 goto out_free_sysfs_res; 917 } 918 } 919 } 920 921 // setup tasklet for DPC 922 tasklet_init(&adapter->dpc_h, megaraid_mbox_dpc, 923 (unsigned long)adapter); 924 925 con_log(CL_DLEVEL1, (KERN_INFO 926 "megaraid mbox hba successfully initialized\n")); 927 928 return 0; 929 930 out_free_sysfs_res: 931 megaraid_sysfs_free_resources(adapter); 932 out_free_irq: 933 free_irq(adapter->irq, adapter); 934 out_alloc_cmds: 935 megaraid_free_cmd_packets(adapter); 936 out_iounmap: 937 iounmap(raid_dev->baseaddr); 938 out_release_regions: 939 pci_release_regions(pdev); 940 out_free_raid_dev: 941 kfree(raid_dev); 942 943 return -1; 944 } 945 946 947 /** 948 * megaraid_fini_mbox - undo controller initialization 949 * @adapter : our soft state 950 */ 951 static void 952 megaraid_fini_mbox(adapter_t *adapter) 953 { 954 mraid_device_t *raid_dev = ADAP2RAIDDEV(adapter); 955 956 // flush all caches 957 megaraid_mbox_flush_cache(adapter); 958 959 tasklet_kill(&adapter->dpc_h); 960 961 megaraid_sysfs_free_resources(adapter); 962 963 megaraid_free_cmd_packets(adapter); 964 965 free_irq(adapter->irq, adapter); 966 967 iounmap(raid_dev->baseaddr); 968 969 pci_release_regions(adapter->pdev); 970 971 kfree(raid_dev); 972 973 return; 974 } 975 976 977 /** 978 * megaraid_alloc_cmd_packets - allocate shared mailbox 979 * @adapter : soft state of the raid controller 980 * 981 * Allocate and align the shared mailbox. This maibox is used to issue 982 * all the commands. For IO based controllers, the mailbox is also regsitered 983 * with the FW. Allocate memory for all commands as well. 984 * This is our big allocator. 985 */ 986 static int 987 megaraid_alloc_cmd_packets(adapter_t *adapter) 988 { 989 mraid_device_t *raid_dev = ADAP2RAIDDEV(adapter); 990 struct pci_dev *pdev; 991 unsigned long align; 992 scb_t *scb; 993 mbox_ccb_t *ccb; 994 struct mraid_pci_blk *epthru_pci_blk; 995 struct mraid_pci_blk *sg_pci_blk; 996 struct mraid_pci_blk *mbox_pci_blk; 997 int i; 998 999 pdev = adapter->pdev; 1000 1001 /* 1002 * Setup the mailbox 1003 * Allocate the common 16-byte aligned memory for the handshake 1004 * mailbox. 1005 */ 1006 raid_dev->una_mbox64 = pci_alloc_consistent(adapter->pdev, 1007 sizeof(mbox64_t), &raid_dev->una_mbox64_dma); 1008 1009 if (!raid_dev->una_mbox64) { 1010 con_log(CL_ANN, (KERN_WARNING 1011 "megaraid: out of memory, %s %d\n", __func__, 1012 __LINE__)); 1013 return -1; 1014 } 1015 memset(raid_dev->una_mbox64, 0, sizeof(mbox64_t)); 1016 1017 /* 1018 * Align the mailbox at 16-byte boundary 1019 */ 1020 raid_dev->mbox = &raid_dev->una_mbox64->mbox32; 1021 1022 raid_dev->mbox = (mbox_t *)((((unsigned long)raid_dev->mbox) + 15) & 1023 (~0UL ^ 0xFUL)); 1024 1025 raid_dev->mbox64 = (mbox64_t *)(((unsigned long)raid_dev->mbox) - 8); 1026 1027 align = ((void *)raid_dev->mbox - 1028 ((void *)&raid_dev->una_mbox64->mbox32)); 1029 1030 raid_dev->mbox_dma = (unsigned long)raid_dev->una_mbox64_dma + 8 + 1031 align; 1032 1033 // Allocate memory for commands issued internally 1034 adapter->ibuf = pci_alloc_consistent(pdev, MBOX_IBUF_SIZE, 1035 &adapter->ibuf_dma_h); 1036 if (!adapter->ibuf) { 1037 1038 con_log(CL_ANN, (KERN_WARNING 1039 "megaraid: out of memory, %s %d\n", __func__, 1040 __LINE__)); 1041 1042 goto out_free_common_mbox; 1043 } 1044 memset(adapter->ibuf, 0, MBOX_IBUF_SIZE); 1045 1046 // Allocate memory for our SCSI Command Blocks and their associated 1047 // memory 1048 1049 /* 1050 * Allocate memory for the base list of scb. Later allocate memory for 1051 * CCBs and embedded components of each CCB and point the pointers in 1052 * scb to the allocated components 1053 * NOTE: The code to allocate SCB will be duplicated in all the LLD 1054 * since the calling routine does not yet know the number of available 1055 * commands. 1056 */ 1057 adapter->kscb_list = kcalloc(MBOX_MAX_SCSI_CMDS, sizeof(scb_t), GFP_KERNEL); 1058 1059 if (adapter->kscb_list == NULL) { 1060 con_log(CL_ANN, (KERN_WARNING 1061 "megaraid: out of memory, %s %d\n", __func__, 1062 __LINE__)); 1063 goto out_free_ibuf; 1064 } 1065 1066 // memory allocation for our command packets 1067 if (megaraid_mbox_setup_dma_pools(adapter) != 0) { 1068 con_log(CL_ANN, (KERN_WARNING 1069 "megaraid: out of memory, %s %d\n", __func__, 1070 __LINE__)); 1071 goto out_free_scb_list; 1072 } 1073 1074 // Adjust the scb pointers and link in the free pool 1075 epthru_pci_blk = raid_dev->epthru_pool; 1076 sg_pci_blk = raid_dev->sg_pool; 1077 mbox_pci_blk = raid_dev->mbox_pool; 1078 1079 for (i = 0; i < MBOX_MAX_SCSI_CMDS; i++) { 1080 scb = adapter->kscb_list + i; 1081 ccb = raid_dev->ccb_list + i; 1082 1083 ccb->mbox = (mbox_t *)(mbox_pci_blk[i].vaddr + 16); 1084 ccb->raw_mbox = (uint8_t *)ccb->mbox; 1085 ccb->mbox64 = (mbox64_t *)(mbox_pci_blk[i].vaddr + 8); 1086 ccb->mbox_dma_h = (unsigned long)mbox_pci_blk[i].dma_addr + 16; 1087 1088 // make sure the mailbox is aligned properly 1089 if (ccb->mbox_dma_h & 0x0F) { 1090 con_log(CL_ANN, (KERN_CRIT 1091 "megaraid mbox: not aligned on 16-bytes\n")); 1092 1093 goto out_teardown_dma_pools; 1094 } 1095 1096 ccb->epthru = (mraid_epassthru_t *) 1097 epthru_pci_blk[i].vaddr; 1098 ccb->epthru_dma_h = epthru_pci_blk[i].dma_addr; 1099 ccb->pthru = (mraid_passthru_t *)ccb->epthru; 1100 ccb->pthru_dma_h = ccb->epthru_dma_h; 1101 1102 1103 ccb->sgl64 = (mbox_sgl64 *)sg_pci_blk[i].vaddr; 1104 ccb->sgl_dma_h = sg_pci_blk[i].dma_addr; 1105 ccb->sgl32 = (mbox_sgl32 *)ccb->sgl64; 1106 1107 scb->ccb = (caddr_t)ccb; 1108 scb->gp = 0; 1109 1110 scb->sno = i; // command index 1111 1112 scb->scp = NULL; 1113 scb->state = SCB_FREE; 1114 scb->dma_direction = PCI_DMA_NONE; 1115 scb->dma_type = MRAID_DMA_NONE; 1116 scb->dev_channel = -1; 1117 scb->dev_target = -1; 1118 1119 // put scb in the free pool 1120 list_add_tail(&scb->list, &adapter->kscb_pool); 1121 } 1122 1123 return 0; 1124 1125 out_teardown_dma_pools: 1126 megaraid_mbox_teardown_dma_pools(adapter); 1127 out_free_scb_list: 1128 kfree(adapter->kscb_list); 1129 out_free_ibuf: 1130 pci_free_consistent(pdev, MBOX_IBUF_SIZE, (void *)adapter->ibuf, 1131 adapter->ibuf_dma_h); 1132 out_free_common_mbox: 1133 pci_free_consistent(adapter->pdev, sizeof(mbox64_t), 1134 (caddr_t)raid_dev->una_mbox64, raid_dev->una_mbox64_dma); 1135 1136 return -1; 1137 } 1138 1139 1140 /** 1141 * megaraid_free_cmd_packets - free memory 1142 * @adapter : soft state of the raid controller 1143 * 1144 * Release memory resources allocated for commands. 1145 */ 1146 static void 1147 megaraid_free_cmd_packets(adapter_t *adapter) 1148 { 1149 mraid_device_t *raid_dev = ADAP2RAIDDEV(adapter); 1150 1151 megaraid_mbox_teardown_dma_pools(adapter); 1152 1153 kfree(adapter->kscb_list); 1154 1155 pci_free_consistent(adapter->pdev, MBOX_IBUF_SIZE, 1156 (void *)adapter->ibuf, adapter->ibuf_dma_h); 1157 1158 pci_free_consistent(adapter->pdev, sizeof(mbox64_t), 1159 (caddr_t)raid_dev->una_mbox64, raid_dev->una_mbox64_dma); 1160 return; 1161 } 1162 1163 1164 /** 1165 * megaraid_mbox_setup_dma_pools - setup dma pool for command packets 1166 * @adapter : HBA soft state 1167 * 1168 * Setup the dma pools for mailbox, passthru and extended passthru structures, 1169 * and scatter-gather lists. 1170 */ 1171 static int 1172 megaraid_mbox_setup_dma_pools(adapter_t *adapter) 1173 { 1174 mraid_device_t *raid_dev = ADAP2RAIDDEV(adapter); 1175 struct mraid_pci_blk *epthru_pci_blk; 1176 struct mraid_pci_blk *sg_pci_blk; 1177 struct mraid_pci_blk *mbox_pci_blk; 1178 int i; 1179 1180 1181 1182 // Allocate memory for 16-bytes aligned mailboxes 1183 raid_dev->mbox_pool_handle = pci_pool_create("megaraid mbox pool", 1184 adapter->pdev, 1185 sizeof(mbox64_t) + 16, 1186 16, 0); 1187 1188 if (raid_dev->mbox_pool_handle == NULL) { 1189 goto fail_setup_dma_pool; 1190 } 1191 1192 mbox_pci_blk = raid_dev->mbox_pool; 1193 for (i = 0; i < MBOX_MAX_SCSI_CMDS; i++) { 1194 mbox_pci_blk[i].vaddr = pci_pool_alloc( 1195 raid_dev->mbox_pool_handle, 1196 GFP_KERNEL, 1197 &mbox_pci_blk[i].dma_addr); 1198 if (!mbox_pci_blk[i].vaddr) { 1199 goto fail_setup_dma_pool; 1200 } 1201 } 1202 1203 /* 1204 * Allocate memory for each embedded passthru strucuture pointer 1205 * Request for a 128 bytes aligned structure for each passthru command 1206 * structure 1207 * Since passthru and extended passthru commands are exclusive, they 1208 * share common memory pool. Passthru structures piggyback on memory 1209 * allocted to extended passthru since passthru is smaller of the two 1210 */ 1211 raid_dev->epthru_pool_handle = pci_pool_create("megaraid mbox pthru", 1212 adapter->pdev, sizeof(mraid_epassthru_t), 128, 0); 1213 1214 if (raid_dev->epthru_pool_handle == NULL) { 1215 goto fail_setup_dma_pool; 1216 } 1217 1218 epthru_pci_blk = raid_dev->epthru_pool; 1219 for (i = 0; i < MBOX_MAX_SCSI_CMDS; i++) { 1220 epthru_pci_blk[i].vaddr = pci_pool_alloc( 1221 raid_dev->epthru_pool_handle, 1222 GFP_KERNEL, 1223 &epthru_pci_blk[i].dma_addr); 1224 if (!epthru_pci_blk[i].vaddr) { 1225 goto fail_setup_dma_pool; 1226 } 1227 } 1228 1229 1230 // Allocate memory for each scatter-gather list. Request for 512 bytes 1231 // alignment for each sg list 1232 raid_dev->sg_pool_handle = pci_pool_create("megaraid mbox sg", 1233 adapter->pdev, 1234 sizeof(mbox_sgl64) * MBOX_MAX_SG_SIZE, 1235 512, 0); 1236 1237 if (raid_dev->sg_pool_handle == NULL) { 1238 goto fail_setup_dma_pool; 1239 } 1240 1241 sg_pci_blk = raid_dev->sg_pool; 1242 for (i = 0; i < MBOX_MAX_SCSI_CMDS; i++) { 1243 sg_pci_blk[i].vaddr = pci_pool_alloc( 1244 raid_dev->sg_pool_handle, 1245 GFP_KERNEL, 1246 &sg_pci_blk[i].dma_addr); 1247 if (!sg_pci_blk[i].vaddr) { 1248 goto fail_setup_dma_pool; 1249 } 1250 } 1251 1252 return 0; 1253 1254 fail_setup_dma_pool: 1255 megaraid_mbox_teardown_dma_pools(adapter); 1256 return -1; 1257 } 1258 1259 1260 /** 1261 * megaraid_mbox_teardown_dma_pools - teardown dma pools for command packets 1262 * @adapter : HBA soft state 1263 * 1264 * Teardown the dma pool for mailbox, passthru and extended passthru 1265 * structures, and scatter-gather lists. 1266 */ 1267 static void 1268 megaraid_mbox_teardown_dma_pools(adapter_t *adapter) 1269 { 1270 mraid_device_t *raid_dev = ADAP2RAIDDEV(adapter); 1271 struct mraid_pci_blk *epthru_pci_blk; 1272 struct mraid_pci_blk *sg_pci_blk; 1273 struct mraid_pci_blk *mbox_pci_blk; 1274 int i; 1275 1276 1277 sg_pci_blk = raid_dev->sg_pool; 1278 for (i = 0; i < MBOX_MAX_SCSI_CMDS && sg_pci_blk[i].vaddr; i++) { 1279 pci_pool_free(raid_dev->sg_pool_handle, sg_pci_blk[i].vaddr, 1280 sg_pci_blk[i].dma_addr); 1281 } 1282 if (raid_dev->sg_pool_handle) 1283 pci_pool_destroy(raid_dev->sg_pool_handle); 1284 1285 1286 epthru_pci_blk = raid_dev->epthru_pool; 1287 for (i = 0; i < MBOX_MAX_SCSI_CMDS && epthru_pci_blk[i].vaddr; i++) { 1288 pci_pool_free(raid_dev->epthru_pool_handle, 1289 epthru_pci_blk[i].vaddr, epthru_pci_blk[i].dma_addr); 1290 } 1291 if (raid_dev->epthru_pool_handle) 1292 pci_pool_destroy(raid_dev->epthru_pool_handle); 1293 1294 1295 mbox_pci_blk = raid_dev->mbox_pool; 1296 for (i = 0; i < MBOX_MAX_SCSI_CMDS && mbox_pci_blk[i].vaddr; i++) { 1297 pci_pool_free(raid_dev->mbox_pool_handle, 1298 mbox_pci_blk[i].vaddr, mbox_pci_blk[i].dma_addr); 1299 } 1300 if (raid_dev->mbox_pool_handle) 1301 pci_pool_destroy(raid_dev->mbox_pool_handle); 1302 1303 return; 1304 } 1305 1306 1307 /** 1308 * megaraid_alloc_scb - detach and return a scb from the free list 1309 * @adapter : controller's soft state 1310 * @scp : pointer to the scsi command to be executed 1311 * 1312 * Return the scb from the head of the free list. %NULL if there are none 1313 * available. 1314 */ 1315 static scb_t * 1316 megaraid_alloc_scb(adapter_t *adapter, struct scsi_cmnd *scp) 1317 { 1318 struct list_head *head = &adapter->kscb_pool; 1319 scb_t *scb = NULL; 1320 unsigned long flags; 1321 1322 // detach scb from free pool 1323 spin_lock_irqsave(SCSI_FREE_LIST_LOCK(adapter), flags); 1324 1325 if (list_empty(head)) { 1326 spin_unlock_irqrestore(SCSI_FREE_LIST_LOCK(adapter), flags); 1327 return NULL; 1328 } 1329 1330 scb = list_entry(head->next, scb_t, list); 1331 list_del_init(&scb->list); 1332 1333 spin_unlock_irqrestore(SCSI_FREE_LIST_LOCK(adapter), flags); 1334 1335 scb->state = SCB_ACTIVE; 1336 scb->scp = scp; 1337 scb->dma_type = MRAID_DMA_NONE; 1338 1339 return scb; 1340 } 1341 1342 1343 /** 1344 * megaraid_dealloc_scb - return the scb to the free pool 1345 * @adapter : controller's soft state 1346 * @scb : scb to be freed 1347 * 1348 * Return the scb back to the free list of scbs. The caller must 'flush' the 1349 * SCB before calling us. E.g., performing pci_unamp and/or pci_sync etc. 1350 * NOTE NOTE: Make sure the scb is not on any list before calling this 1351 * routine. 1352 */ 1353 static inline void 1354 megaraid_dealloc_scb(adapter_t *adapter, scb_t *scb) 1355 { 1356 unsigned long flags; 1357 1358 // put scb in the free pool 1359 scb->state = SCB_FREE; 1360 scb->scp = NULL; 1361 spin_lock_irqsave(SCSI_FREE_LIST_LOCK(adapter), flags); 1362 1363 list_add(&scb->list, &adapter->kscb_pool); 1364 1365 spin_unlock_irqrestore(SCSI_FREE_LIST_LOCK(adapter), flags); 1366 1367 return; 1368 } 1369 1370 1371 /** 1372 * megaraid_mbox_mksgl - make the scatter-gather list 1373 * @adapter : controller's soft state 1374 * @scb : scsi control block 1375 * 1376 * Prepare the scatter-gather list. 1377 */ 1378 static int 1379 megaraid_mbox_mksgl(adapter_t *adapter, scb_t *scb) 1380 { 1381 struct scatterlist *sgl; 1382 mbox_ccb_t *ccb; 1383 struct scsi_cmnd *scp; 1384 int sgcnt; 1385 int i; 1386 1387 1388 scp = scb->scp; 1389 ccb = (mbox_ccb_t *)scb->ccb; 1390 1391 sgcnt = scsi_dma_map(scp); 1392 BUG_ON(sgcnt < 0 || sgcnt > adapter->sglen); 1393 1394 // no mapping required if no data to be transferred 1395 if (!sgcnt) 1396 return 0; 1397 1398 scb->dma_type = MRAID_DMA_WSG; 1399 1400 scsi_for_each_sg(scp, sgl, sgcnt, i) { 1401 ccb->sgl64[i].address = sg_dma_address(sgl); 1402 ccb->sgl64[i].length = sg_dma_len(sgl); 1403 } 1404 1405 // Return count of SG nodes 1406 return sgcnt; 1407 } 1408 1409 1410 /** 1411 * mbox_post_cmd - issue a mailbox command 1412 * @adapter : controller's soft state 1413 * @scb : command to be issued 1414 * 1415 * Post the command to the controller if mailbox is available. 1416 */ 1417 static int 1418 mbox_post_cmd(adapter_t *adapter, scb_t *scb) 1419 { 1420 mraid_device_t *raid_dev = ADAP2RAIDDEV(adapter); 1421 mbox64_t *mbox64; 1422 mbox_t *mbox; 1423 mbox_ccb_t *ccb; 1424 unsigned long flags; 1425 unsigned int i = 0; 1426 1427 1428 ccb = (mbox_ccb_t *)scb->ccb; 1429 mbox = raid_dev->mbox; 1430 mbox64 = raid_dev->mbox64; 1431 1432 /* 1433 * Check for busy mailbox. If it is, return failure - the caller 1434 * should retry later. 1435 */ 1436 spin_lock_irqsave(MAILBOX_LOCK(raid_dev), flags); 1437 1438 if (unlikely(mbox->busy)) { 1439 do { 1440 udelay(1); 1441 i++; 1442 rmb(); 1443 } while(mbox->busy && (i < max_mbox_busy_wait)); 1444 1445 if (mbox->busy) { 1446 1447 spin_unlock_irqrestore(MAILBOX_LOCK(raid_dev), flags); 1448 1449 return -1; 1450 } 1451 } 1452 1453 1454 // Copy this command's mailbox data into "adapter's" mailbox 1455 memcpy((caddr_t)mbox64, (caddr_t)ccb->mbox64, 22); 1456 mbox->cmdid = scb->sno; 1457 1458 adapter->outstanding_cmds++; 1459 1460 if (scb->dma_direction == PCI_DMA_TODEVICE) 1461 pci_dma_sync_sg_for_device(adapter->pdev, 1462 scsi_sglist(scb->scp), 1463 scsi_sg_count(scb->scp), 1464 PCI_DMA_TODEVICE); 1465 1466 mbox->busy = 1; // Set busy 1467 mbox->poll = 0; 1468 mbox->ack = 0; 1469 wmb(); 1470 1471 WRINDOOR(raid_dev, raid_dev->mbox_dma | 0x1); 1472 1473 spin_unlock_irqrestore(MAILBOX_LOCK(raid_dev), flags); 1474 1475 return 0; 1476 } 1477 1478 1479 /** 1480 * megaraid_queue_command - generic queue entry point for all LLDs 1481 * @scp : pointer to the scsi command to be executed 1482 * @done : callback routine to be called after the cmd has be completed 1483 * 1484 * Queue entry point for mailbox based controllers. 1485 */ 1486 static int 1487 megaraid_queue_command_lck(struct scsi_cmnd *scp, void (*done)(struct scsi_cmnd *)) 1488 { 1489 adapter_t *adapter; 1490 scb_t *scb; 1491 int if_busy; 1492 1493 adapter = SCP2ADAPTER(scp); 1494 scp->scsi_done = done; 1495 scp->result = 0; 1496 1497 /* 1498 * Allocate and build a SCB request 1499 * if_busy flag will be set if megaraid_mbox_build_cmd() command could 1500 * not allocate scb. We will return non-zero status in that case. 1501 * NOTE: scb can be null even though certain commands completed 1502 * successfully, e.g., MODE_SENSE and TEST_UNIT_READY, it would 1503 * return 0 in that case, and we would do the callback right away. 1504 */ 1505 if_busy = 0; 1506 scb = megaraid_mbox_build_cmd(adapter, scp, &if_busy); 1507 if (!scb) { // command already completed 1508 done(scp); 1509 return 0; 1510 } 1511 1512 megaraid_mbox_runpendq(adapter, scb); 1513 return if_busy; 1514 } 1515 1516 static DEF_SCSI_QCMD(megaraid_queue_command) 1517 1518 /** 1519 * megaraid_mbox_build_cmd - transform the mid-layer scsi commands 1520 * @adapter : controller's soft state 1521 * @scp : mid-layer scsi command pointer 1522 * @busy : set if request could not be completed because of lack of 1523 * resources 1524 * 1525 * Transform the mid-layer scsi command to megaraid firmware lingua. 1526 * Convert the command issued by mid-layer to format understood by megaraid 1527 * firmware. We also complete certain commands without sending them to firmware. 1528 */ 1529 static scb_t * 1530 megaraid_mbox_build_cmd(adapter_t *adapter, struct scsi_cmnd *scp, int *busy) 1531 { 1532 mraid_device_t *rdev = ADAP2RAIDDEV(adapter); 1533 int channel; 1534 int target; 1535 int islogical; 1536 mbox_ccb_t *ccb; 1537 mraid_passthru_t *pthru; 1538 mbox64_t *mbox64; 1539 mbox_t *mbox; 1540 scb_t *scb; 1541 char skip[] = "skipping"; 1542 char scan[] = "scanning"; 1543 char *ss; 1544 1545 1546 /* 1547 * Get the appropriate device map for the device this command is 1548 * intended for 1549 */ 1550 MRAID_GET_DEVICE_MAP(adapter, scp, channel, target, islogical); 1551 1552 /* 1553 * Logical drive commands 1554 */ 1555 if (islogical) { 1556 switch (scp->cmnd[0]) { 1557 case TEST_UNIT_READY: 1558 /* 1559 * Do we support clustering and is the support enabled 1560 * If no, return success always 1561 */ 1562 if (!adapter->ha) { 1563 scp->result = (DID_OK << 16); 1564 return NULL; 1565 } 1566 1567 if (!(scb = megaraid_alloc_scb(adapter, scp))) { 1568 scp->result = (DID_ERROR << 16); 1569 *busy = 1; 1570 return NULL; 1571 } 1572 1573 scb->dma_direction = scp->sc_data_direction; 1574 scb->dev_channel = 0xFF; 1575 scb->dev_target = target; 1576 ccb = (mbox_ccb_t *)scb->ccb; 1577 1578 /* 1579 * The command id will be provided by the command 1580 * issuance routine 1581 */ 1582 ccb->raw_mbox[0] = CLUSTER_CMD; 1583 ccb->raw_mbox[2] = RESERVATION_STATUS; 1584 ccb->raw_mbox[3] = target; 1585 1586 return scb; 1587 1588 case MODE_SENSE: 1589 { 1590 struct scatterlist *sgl; 1591 caddr_t vaddr; 1592 1593 sgl = scsi_sglist(scp); 1594 if (sg_page(sgl)) { 1595 vaddr = (caddr_t) sg_virt(&sgl[0]); 1596 1597 memset(vaddr, 0, scp->cmnd[4]); 1598 } 1599 else { 1600 con_log(CL_ANN, (KERN_WARNING 1601 "megaraid mailbox: invalid sg:%d\n", 1602 __LINE__)); 1603 } 1604 } 1605 scp->result = (DID_OK << 16); 1606 return NULL; 1607 1608 case INQUIRY: 1609 /* 1610 * Display the channel scan for logical drives 1611 * Do not display scan for a channel if already done. 1612 */ 1613 if (!(rdev->last_disp & (1L << SCP2CHANNEL(scp)))) { 1614 1615 con_log(CL_ANN, (KERN_INFO 1616 "scsi[%d]: scanning scsi channel %d", 1617 adapter->host->host_no, 1618 SCP2CHANNEL(scp))); 1619 1620 con_log(CL_ANN, ( 1621 " [virtual] for logical drives\n")); 1622 1623 rdev->last_disp |= (1L << SCP2CHANNEL(scp)); 1624 } 1625 1626 if (scp->cmnd[1] & MEGA_SCSI_INQ_EVPD) { 1627 scp->sense_buffer[0] = 0x70; 1628 scp->sense_buffer[2] = ILLEGAL_REQUEST; 1629 scp->sense_buffer[12] = MEGA_INVALID_FIELD_IN_CDB; 1630 scp->result = CHECK_CONDITION << 1; 1631 return NULL; 1632 } 1633 1634 /* Fall through */ 1635 1636 case READ_CAPACITY: 1637 /* 1638 * Do not allow LUN > 0 for logical drives and 1639 * requests for more than 40 logical drives 1640 */ 1641 if (SCP2LUN(scp)) { 1642 scp->result = (DID_BAD_TARGET << 16); 1643 return NULL; 1644 } 1645 if ((target % 0x80) >= MAX_LOGICAL_DRIVES_40LD) { 1646 scp->result = (DID_BAD_TARGET << 16); 1647 return NULL; 1648 } 1649 1650 1651 /* Allocate a SCB and initialize passthru */ 1652 if (!(scb = megaraid_alloc_scb(adapter, scp))) { 1653 scp->result = (DID_ERROR << 16); 1654 *busy = 1; 1655 return NULL; 1656 } 1657 1658 ccb = (mbox_ccb_t *)scb->ccb; 1659 scb->dev_channel = 0xFF; 1660 scb->dev_target = target; 1661 pthru = ccb->pthru; 1662 mbox = ccb->mbox; 1663 mbox64 = ccb->mbox64; 1664 1665 pthru->timeout = 0; 1666 pthru->ars = 1; 1667 pthru->reqsenselen = 14; 1668 pthru->islogical = 1; 1669 pthru->logdrv = target; 1670 pthru->cdblen = scp->cmd_len; 1671 memcpy(pthru->cdb, scp->cmnd, scp->cmd_len); 1672 1673 mbox->cmd = MBOXCMD_PASSTHRU64; 1674 scb->dma_direction = scp->sc_data_direction; 1675 1676 pthru->dataxferlen = scsi_bufflen(scp); 1677 pthru->dataxferaddr = ccb->sgl_dma_h; 1678 pthru->numsge = megaraid_mbox_mksgl(adapter, 1679 scb); 1680 1681 mbox->xferaddr = 0xFFFFFFFF; 1682 mbox64->xferaddr_lo = (uint32_t )ccb->pthru_dma_h; 1683 mbox64->xferaddr_hi = 0; 1684 1685 return scb; 1686 1687 case READ_6: 1688 case WRITE_6: 1689 case READ_10: 1690 case WRITE_10: 1691 case READ_12: 1692 case WRITE_12: 1693 1694 /* 1695 * Allocate a SCB and initialize mailbox 1696 */ 1697 if (!(scb = megaraid_alloc_scb(adapter, scp))) { 1698 scp->result = (DID_ERROR << 16); 1699 *busy = 1; 1700 return NULL; 1701 } 1702 ccb = (mbox_ccb_t *)scb->ccb; 1703 scb->dev_channel = 0xFF; 1704 scb->dev_target = target; 1705 mbox = ccb->mbox; 1706 mbox64 = ccb->mbox64; 1707 mbox->logdrv = target; 1708 1709 /* 1710 * A little HACK: 2nd bit is zero for all scsi read 1711 * commands and is set for all scsi write commands 1712 */ 1713 mbox->cmd = (scp->cmnd[0] & 0x02) ? MBOXCMD_LWRITE64: 1714 MBOXCMD_LREAD64 ; 1715 1716 /* 1717 * 6-byte READ(0x08) or WRITE(0x0A) cdb 1718 */ 1719 if (scp->cmd_len == 6) { 1720 mbox->numsectors = (uint32_t)scp->cmnd[4]; 1721 mbox->lba = 1722 ((uint32_t)scp->cmnd[1] << 16) | 1723 ((uint32_t)scp->cmnd[2] << 8) | 1724 (uint32_t)scp->cmnd[3]; 1725 1726 mbox->lba &= 0x1FFFFF; 1727 } 1728 1729 /* 1730 * 10-byte READ(0x28) or WRITE(0x2A) cdb 1731 */ 1732 else if (scp->cmd_len == 10) { 1733 mbox->numsectors = 1734 (uint32_t)scp->cmnd[8] | 1735 ((uint32_t)scp->cmnd[7] << 8); 1736 mbox->lba = 1737 ((uint32_t)scp->cmnd[2] << 24) | 1738 ((uint32_t)scp->cmnd[3] << 16) | 1739 ((uint32_t)scp->cmnd[4] << 8) | 1740 (uint32_t)scp->cmnd[5]; 1741 } 1742 1743 /* 1744 * 12-byte READ(0xA8) or WRITE(0xAA) cdb 1745 */ 1746 else if (scp->cmd_len == 12) { 1747 mbox->lba = 1748 ((uint32_t)scp->cmnd[2] << 24) | 1749 ((uint32_t)scp->cmnd[3] << 16) | 1750 ((uint32_t)scp->cmnd[4] << 8) | 1751 (uint32_t)scp->cmnd[5]; 1752 1753 mbox->numsectors = 1754 ((uint32_t)scp->cmnd[6] << 24) | 1755 ((uint32_t)scp->cmnd[7] << 16) | 1756 ((uint32_t)scp->cmnd[8] << 8) | 1757 (uint32_t)scp->cmnd[9]; 1758 } 1759 else { 1760 con_log(CL_ANN, (KERN_WARNING 1761 "megaraid: unsupported CDB length\n")); 1762 1763 megaraid_dealloc_scb(adapter, scb); 1764 1765 scp->result = (DID_ERROR << 16); 1766 return NULL; 1767 } 1768 1769 scb->dma_direction = scp->sc_data_direction; 1770 1771 // Calculate Scatter-Gather info 1772 mbox64->xferaddr_lo = (uint32_t )ccb->sgl_dma_h; 1773 mbox->numsge = megaraid_mbox_mksgl(adapter, 1774 scb); 1775 mbox->xferaddr = 0xFFFFFFFF; 1776 mbox64->xferaddr_hi = 0; 1777 1778 return scb; 1779 1780 case RESERVE: 1781 case RELEASE: 1782 /* 1783 * Do we support clustering and is the support enabled 1784 */ 1785 if (!adapter->ha) { 1786 scp->result = (DID_BAD_TARGET << 16); 1787 return NULL; 1788 } 1789 1790 /* 1791 * Allocate a SCB and initialize mailbox 1792 */ 1793 if (!(scb = megaraid_alloc_scb(adapter, scp))) { 1794 scp->result = (DID_ERROR << 16); 1795 *busy = 1; 1796 return NULL; 1797 } 1798 1799 ccb = (mbox_ccb_t *)scb->ccb; 1800 scb->dev_channel = 0xFF; 1801 scb->dev_target = target; 1802 ccb->raw_mbox[0] = CLUSTER_CMD; 1803 ccb->raw_mbox[2] = (scp->cmnd[0] == RESERVE) ? 1804 RESERVE_LD : RELEASE_LD; 1805 1806 ccb->raw_mbox[3] = target; 1807 scb->dma_direction = scp->sc_data_direction; 1808 1809 return scb; 1810 1811 default: 1812 scp->result = (DID_BAD_TARGET << 16); 1813 return NULL; 1814 } 1815 } 1816 else { // Passthru device commands 1817 1818 // Do not allow access to target id > 15 or LUN > 7 1819 if (target > 15 || SCP2LUN(scp) > 7) { 1820 scp->result = (DID_BAD_TARGET << 16); 1821 return NULL; 1822 } 1823 1824 // if fast load option was set and scan for last device is 1825 // over, reset the fast_load flag so that during a possible 1826 // next scan, devices can be made available 1827 if (rdev->fast_load && (target == 15) && 1828 (SCP2CHANNEL(scp) == adapter->max_channel -1)) { 1829 1830 con_log(CL_ANN, (KERN_INFO 1831 "megaraid[%d]: physical device scan re-enabled\n", 1832 adapter->host->host_no)); 1833 rdev->fast_load = 0; 1834 } 1835 1836 /* 1837 * Display the channel scan for physical devices 1838 */ 1839 if (!(rdev->last_disp & (1L << SCP2CHANNEL(scp)))) { 1840 1841 ss = rdev->fast_load ? skip : scan; 1842 1843 con_log(CL_ANN, (KERN_INFO 1844 "scsi[%d]: %s scsi channel %d [Phy %d]", 1845 adapter->host->host_no, ss, SCP2CHANNEL(scp), 1846 channel)); 1847 1848 con_log(CL_ANN, ( 1849 " for non-raid devices\n")); 1850 1851 rdev->last_disp |= (1L << SCP2CHANNEL(scp)); 1852 } 1853 1854 // disable channel sweep if fast load option given 1855 if (rdev->fast_load) { 1856 scp->result = (DID_BAD_TARGET << 16); 1857 return NULL; 1858 } 1859 1860 // Allocate a SCB and initialize passthru 1861 if (!(scb = megaraid_alloc_scb(adapter, scp))) { 1862 scp->result = (DID_ERROR << 16); 1863 *busy = 1; 1864 return NULL; 1865 } 1866 1867 ccb = (mbox_ccb_t *)scb->ccb; 1868 scb->dev_channel = channel; 1869 scb->dev_target = target; 1870 scb->dma_direction = scp->sc_data_direction; 1871 mbox = ccb->mbox; 1872 mbox64 = ccb->mbox64; 1873 1874 // Does this firmware support extended CDBs 1875 if (adapter->max_cdb_sz == 16) { 1876 mbox->cmd = MBOXCMD_EXTPTHRU; 1877 1878 megaraid_mbox_prepare_epthru(adapter, scb, scp); 1879 1880 mbox64->xferaddr_lo = (uint32_t)ccb->epthru_dma_h; 1881 mbox64->xferaddr_hi = 0; 1882 mbox->xferaddr = 0xFFFFFFFF; 1883 } 1884 else { 1885 mbox->cmd = MBOXCMD_PASSTHRU64; 1886 1887 megaraid_mbox_prepare_pthru(adapter, scb, scp); 1888 1889 mbox64->xferaddr_lo = (uint32_t)ccb->pthru_dma_h; 1890 mbox64->xferaddr_hi = 0; 1891 mbox->xferaddr = 0xFFFFFFFF; 1892 } 1893 return scb; 1894 } 1895 1896 // NOT REACHED 1897 } 1898 1899 1900 /** 1901 * megaraid_mbox_runpendq - execute commands queued in the pending queue 1902 * @adapter : controller's soft state 1903 * @scb_q : SCB to be queued in the pending list 1904 * 1905 * Scan the pending list for commands which are not yet issued and try to 1906 * post to the controller. The SCB can be a null pointer, which would indicate 1907 * no SCB to be queue, just try to execute the ones in the pending list. 1908 * 1909 * NOTE: We do not actually traverse the pending list. The SCBs are plucked 1910 * out from the head of the pending list. If it is successfully issued, the 1911 * next SCB is at the head now. 1912 */ 1913 static void 1914 megaraid_mbox_runpendq(adapter_t *adapter, scb_t *scb_q) 1915 { 1916 scb_t *scb; 1917 unsigned long flags; 1918 1919 spin_lock_irqsave(PENDING_LIST_LOCK(adapter), flags); 1920 1921 if (scb_q) { 1922 scb_q->state = SCB_PENDQ; 1923 list_add_tail(&scb_q->list, &adapter->pend_list); 1924 } 1925 1926 // if the adapter in not in quiescent mode, post the commands to FW 1927 if (adapter->quiescent) { 1928 spin_unlock_irqrestore(PENDING_LIST_LOCK(adapter), flags); 1929 return; 1930 } 1931 1932 while (!list_empty(&adapter->pend_list)) { 1933 1934 assert_spin_locked(PENDING_LIST_LOCK(adapter)); 1935 1936 scb = list_entry(adapter->pend_list.next, scb_t, list); 1937 1938 // remove the scb from the pending list and try to 1939 // issue. If we are unable to issue it, put back in 1940 // the pending list and return 1941 1942 list_del_init(&scb->list); 1943 1944 spin_unlock_irqrestore(PENDING_LIST_LOCK(adapter), flags); 1945 1946 // if mailbox was busy, return SCB back to pending 1947 // list. Make sure to add at the head, since that's 1948 // where it would have been removed from 1949 1950 scb->state = SCB_ISSUED; 1951 1952 if (mbox_post_cmd(adapter, scb) != 0) { 1953 1954 spin_lock_irqsave(PENDING_LIST_LOCK(adapter), flags); 1955 1956 scb->state = SCB_PENDQ; 1957 1958 list_add(&scb->list, &adapter->pend_list); 1959 1960 spin_unlock_irqrestore(PENDING_LIST_LOCK(adapter), 1961 flags); 1962 1963 return; 1964 } 1965 1966 spin_lock_irqsave(PENDING_LIST_LOCK(adapter), flags); 1967 } 1968 1969 spin_unlock_irqrestore(PENDING_LIST_LOCK(adapter), flags); 1970 1971 1972 return; 1973 } 1974 1975 1976 /** 1977 * megaraid_mbox_prepare_pthru - prepare a command for physical devices 1978 * @adapter : pointer to controller's soft state 1979 * @scb : scsi control block 1980 * @scp : scsi command from the mid-layer 1981 * 1982 * Prepare a command for the scsi physical devices. 1983 */ 1984 static void 1985 megaraid_mbox_prepare_pthru(adapter_t *adapter, scb_t *scb, 1986 struct scsi_cmnd *scp) 1987 { 1988 mbox_ccb_t *ccb; 1989 mraid_passthru_t *pthru; 1990 uint8_t channel; 1991 uint8_t target; 1992 1993 ccb = (mbox_ccb_t *)scb->ccb; 1994 pthru = ccb->pthru; 1995 channel = scb->dev_channel; 1996 target = scb->dev_target; 1997 1998 // 0=6sec, 1=60sec, 2=10min, 3=3hrs, 4=NO timeout 1999 pthru->timeout = 4; 2000 pthru->ars = 1; 2001 pthru->islogical = 0; 2002 pthru->channel = 0; 2003 pthru->target = (channel << 4) | target; 2004 pthru->logdrv = SCP2LUN(scp); 2005 pthru->reqsenselen = 14; 2006 pthru->cdblen = scp->cmd_len; 2007 2008 memcpy(pthru->cdb, scp->cmnd, scp->cmd_len); 2009 2010 if (scsi_bufflen(scp)) { 2011 pthru->dataxferlen = scsi_bufflen(scp); 2012 pthru->dataxferaddr = ccb->sgl_dma_h; 2013 pthru->numsge = megaraid_mbox_mksgl(adapter, scb); 2014 } 2015 else { 2016 pthru->dataxferaddr = 0; 2017 pthru->dataxferlen = 0; 2018 pthru->numsge = 0; 2019 } 2020 return; 2021 } 2022 2023 2024 /** 2025 * megaraid_mbox_prepare_epthru - prepare a command for physical devices 2026 * @adapter : pointer to controller's soft state 2027 * @scb : scsi control block 2028 * @scp : scsi command from the mid-layer 2029 * 2030 * Prepare a command for the scsi physical devices. This rountine prepares 2031 * commands for devices which can take extended CDBs (>10 bytes). 2032 */ 2033 static void 2034 megaraid_mbox_prepare_epthru(adapter_t *adapter, scb_t *scb, 2035 struct scsi_cmnd *scp) 2036 { 2037 mbox_ccb_t *ccb; 2038 mraid_epassthru_t *epthru; 2039 uint8_t channel; 2040 uint8_t target; 2041 2042 ccb = (mbox_ccb_t *)scb->ccb; 2043 epthru = ccb->epthru; 2044 channel = scb->dev_channel; 2045 target = scb->dev_target; 2046 2047 // 0=6sec, 1=60sec, 2=10min, 3=3hrs, 4=NO timeout 2048 epthru->timeout = 4; 2049 epthru->ars = 1; 2050 epthru->islogical = 0; 2051 epthru->channel = 0; 2052 epthru->target = (channel << 4) | target; 2053 epthru->logdrv = SCP2LUN(scp); 2054 epthru->reqsenselen = 14; 2055 epthru->cdblen = scp->cmd_len; 2056 2057 memcpy(epthru->cdb, scp->cmnd, scp->cmd_len); 2058 2059 if (scsi_bufflen(scp)) { 2060 epthru->dataxferlen = scsi_bufflen(scp); 2061 epthru->dataxferaddr = ccb->sgl_dma_h; 2062 epthru->numsge = megaraid_mbox_mksgl(adapter, scb); 2063 } 2064 else { 2065 epthru->dataxferaddr = 0; 2066 epthru->dataxferlen = 0; 2067 epthru->numsge = 0; 2068 } 2069 return; 2070 } 2071 2072 2073 /** 2074 * megaraid_ack_sequence - interrupt ack sequence for memory mapped HBAs 2075 * @adapter : controller's soft state 2076 * 2077 * Interrupt acknowledgement sequence for memory mapped HBAs. Find out the 2078 * completed command and put them on the completed list for later processing. 2079 * 2080 * Returns: 1 if the interrupt is valid, 0 otherwise 2081 */ 2082 static int 2083 megaraid_ack_sequence(adapter_t *adapter) 2084 { 2085 mraid_device_t *raid_dev = ADAP2RAIDDEV(adapter); 2086 mbox_t *mbox; 2087 scb_t *scb; 2088 uint8_t nstatus; 2089 uint8_t completed[MBOX_MAX_FIRMWARE_STATUS]; 2090 struct list_head clist; 2091 int handled; 2092 uint32_t dword; 2093 unsigned long flags; 2094 int i, j; 2095 2096 2097 mbox = raid_dev->mbox; 2098 2099 // move the SCBs from the firmware completed array to our local list 2100 INIT_LIST_HEAD(&clist); 2101 2102 // loop till F/W has more commands for us to complete 2103 handled = 0; 2104 spin_lock_irqsave(MAILBOX_LOCK(raid_dev), flags); 2105 do { 2106 /* 2107 * Check if a valid interrupt is pending. If found, force the 2108 * interrupt line low. 2109 */ 2110 dword = RDOUTDOOR(raid_dev); 2111 if (dword != 0x10001234) break; 2112 2113 handled = 1; 2114 2115 WROUTDOOR(raid_dev, 0x10001234); 2116 2117 nstatus = 0; 2118 // wait for valid numstatus to post 2119 for (i = 0; i < 0xFFFFF; i++) { 2120 if (mbox->numstatus != 0xFF) { 2121 nstatus = mbox->numstatus; 2122 break; 2123 } 2124 rmb(); 2125 } 2126 mbox->numstatus = 0xFF; 2127 2128 adapter->outstanding_cmds -= nstatus; 2129 2130 for (i = 0; i < nstatus; i++) { 2131 2132 // wait for valid command index to post 2133 for (j = 0; j < 0xFFFFF; j++) { 2134 if (mbox->completed[i] != 0xFF) break; 2135 rmb(); 2136 } 2137 completed[i] = mbox->completed[i]; 2138 mbox->completed[i] = 0xFF; 2139 2140 if (completed[i] == 0xFF) { 2141 con_log(CL_ANN, (KERN_CRIT 2142 "megaraid: command posting timed out\n")); 2143 2144 BUG(); 2145 continue; 2146 } 2147 2148 // Get SCB associated with this command id 2149 if (completed[i] >= MBOX_MAX_SCSI_CMDS) { 2150 // a cmm command 2151 scb = adapter->uscb_list + (completed[i] - 2152 MBOX_MAX_SCSI_CMDS); 2153 } 2154 else { 2155 // an os command 2156 scb = adapter->kscb_list + completed[i]; 2157 } 2158 2159 scb->status = mbox->status; 2160 list_add_tail(&scb->list, &clist); 2161 } 2162 2163 // Acknowledge interrupt 2164 WRINDOOR(raid_dev, 0x02); 2165 2166 } while(1); 2167 2168 spin_unlock_irqrestore(MAILBOX_LOCK(raid_dev), flags); 2169 2170 2171 // put the completed commands in the completed list. DPC would 2172 // complete these commands later 2173 spin_lock_irqsave(COMPLETED_LIST_LOCK(adapter), flags); 2174 2175 list_splice(&clist, &adapter->completed_list); 2176 2177 spin_unlock_irqrestore(COMPLETED_LIST_LOCK(adapter), flags); 2178 2179 2180 // schedule the DPC if there is some work for it 2181 if (handled) 2182 tasklet_schedule(&adapter->dpc_h); 2183 2184 return handled; 2185 } 2186 2187 2188 /** 2189 * megaraid_isr - isr for memory based mailbox based controllers 2190 * @irq : irq 2191 * @devp : pointer to our soft state 2192 * 2193 * Interrupt service routine for memory-mapped mailbox controllers. 2194 */ 2195 static irqreturn_t 2196 megaraid_isr(int irq, void *devp) 2197 { 2198 adapter_t *adapter = devp; 2199 int handled; 2200 2201 handled = megaraid_ack_sequence(adapter); 2202 2203 /* Loop through any pending requests */ 2204 if (!adapter->quiescent) { 2205 megaraid_mbox_runpendq(adapter, NULL); 2206 } 2207 2208 return IRQ_RETVAL(handled); 2209 } 2210 2211 2212 /** 2213 * megaraid_mbox_sync_scb - sync kernel buffers 2214 * @adapter : controller's soft state 2215 * @scb : pointer to the resource packet 2216 * 2217 * DMA sync if required. 2218 */ 2219 static void 2220 megaraid_mbox_sync_scb(adapter_t *adapter, scb_t *scb) 2221 { 2222 mbox_ccb_t *ccb; 2223 2224 ccb = (mbox_ccb_t *)scb->ccb; 2225 2226 if (scb->dma_direction == PCI_DMA_FROMDEVICE) 2227 pci_dma_sync_sg_for_cpu(adapter->pdev, 2228 scsi_sglist(scb->scp), 2229 scsi_sg_count(scb->scp), 2230 PCI_DMA_FROMDEVICE); 2231 2232 scsi_dma_unmap(scb->scp); 2233 return; 2234 } 2235 2236 2237 /** 2238 * megaraid_mbox_dpc - the tasklet to complete the commands from completed list 2239 * @devp : pointer to HBA soft state 2240 * 2241 * Pick up the commands from the completed list and send back to the owners. 2242 * This is a reentrant function and does not assume any locks are held while 2243 * it is being called. 2244 */ 2245 static void 2246 megaraid_mbox_dpc(unsigned long devp) 2247 { 2248 adapter_t *adapter = (adapter_t *)devp; 2249 mraid_device_t *raid_dev; 2250 struct list_head clist; 2251 struct scatterlist *sgl; 2252 scb_t *scb; 2253 scb_t *tmp; 2254 struct scsi_cmnd *scp; 2255 mraid_passthru_t *pthru; 2256 mraid_epassthru_t *epthru; 2257 mbox_ccb_t *ccb; 2258 int islogical; 2259 int pdev_index; 2260 int pdev_state; 2261 mbox_t *mbox; 2262 unsigned long flags; 2263 uint8_t c; 2264 int status; 2265 uioc_t *kioc; 2266 2267 2268 if (!adapter) return; 2269 2270 raid_dev = ADAP2RAIDDEV(adapter); 2271 2272 // move the SCBs from the completed list to our local list 2273 INIT_LIST_HEAD(&clist); 2274 2275 spin_lock_irqsave(COMPLETED_LIST_LOCK(adapter), flags); 2276 2277 list_splice_init(&adapter->completed_list, &clist); 2278 2279 spin_unlock_irqrestore(COMPLETED_LIST_LOCK(adapter), flags); 2280 2281 2282 list_for_each_entry_safe(scb, tmp, &clist, list) { 2283 2284 status = scb->status; 2285 scp = scb->scp; 2286 ccb = (mbox_ccb_t *)scb->ccb; 2287 pthru = ccb->pthru; 2288 epthru = ccb->epthru; 2289 mbox = ccb->mbox; 2290 2291 // Make sure f/w has completed a valid command 2292 if (scb->state != SCB_ISSUED) { 2293 con_log(CL_ANN, (KERN_CRIT 2294 "megaraid critical err: invalid command %d:%d:%p\n", 2295 scb->sno, scb->state, scp)); 2296 BUG(); 2297 continue; // Must never happen! 2298 } 2299 2300 // check for the management command and complete it right away 2301 if (scb->sno >= MBOX_MAX_SCSI_CMDS) { 2302 scb->state = SCB_FREE; 2303 scb->status = status; 2304 2305 // remove from local clist 2306 list_del_init(&scb->list); 2307 2308 kioc = (uioc_t *)scb->gp; 2309 kioc->status = 0; 2310 2311 megaraid_mbox_mm_done(adapter, scb); 2312 2313 continue; 2314 } 2315 2316 // Was an abort issued for this command earlier 2317 if (scb->state & SCB_ABORT) { 2318 con_log(CL_ANN, (KERN_NOTICE 2319 "megaraid: aborted cmd [%x] completed\n", 2320 scb->sno)); 2321 } 2322 2323 /* 2324 * If the inquiry came of a disk drive which is not part of 2325 * any RAID array, expose it to the kernel. For this to be 2326 * enabled, user must set the "megaraid_expose_unconf_disks" 2327 * flag to 1 by specifying it on module parameter list. 2328 * This would enable data migration off drives from other 2329 * configurations. 2330 */ 2331 islogical = MRAID_IS_LOGICAL(adapter, scp); 2332 if (scp->cmnd[0] == INQUIRY && status == 0 && islogical == 0 2333 && IS_RAID_CH(raid_dev, scb->dev_channel)) { 2334 2335 sgl = scsi_sglist(scp); 2336 if (sg_page(sgl)) { 2337 c = *(unsigned char *) sg_virt(&sgl[0]); 2338 } else { 2339 con_log(CL_ANN, (KERN_WARNING 2340 "megaraid mailbox: invalid sg:%d\n", 2341 __LINE__)); 2342 c = 0; 2343 } 2344 2345 if ((c & 0x1F ) == TYPE_DISK) { 2346 pdev_index = (scb->dev_channel * 16) + 2347 scb->dev_target; 2348 pdev_state = 2349 raid_dev->pdrv_state[pdev_index] & 0x0F; 2350 2351 if (pdev_state == PDRV_ONLINE || 2352 pdev_state == PDRV_FAILED || 2353 pdev_state == PDRV_RBLD || 2354 pdev_state == PDRV_HOTSPARE || 2355 megaraid_expose_unconf_disks == 0) { 2356 2357 status = 0xF0; 2358 } 2359 } 2360 } 2361 2362 // Convert MegaRAID status to Linux error code 2363 switch (status) { 2364 2365 case 0x00: 2366 2367 scp->result = (DID_OK << 16); 2368 break; 2369 2370 case 0x02: 2371 2372 /* set sense_buffer and result fields */ 2373 if (mbox->cmd == MBOXCMD_PASSTHRU || 2374 mbox->cmd == MBOXCMD_PASSTHRU64) { 2375 2376 memcpy(scp->sense_buffer, pthru->reqsensearea, 2377 14); 2378 2379 scp->result = DRIVER_SENSE << 24 | 2380 DID_OK << 16 | CHECK_CONDITION << 1; 2381 } 2382 else { 2383 if (mbox->cmd == MBOXCMD_EXTPTHRU) { 2384 2385 memcpy(scp->sense_buffer, 2386 epthru->reqsensearea, 14); 2387 2388 scp->result = DRIVER_SENSE << 24 | 2389 DID_OK << 16 | 2390 CHECK_CONDITION << 1; 2391 } else { 2392 scp->sense_buffer[0] = 0x70; 2393 scp->sense_buffer[2] = ABORTED_COMMAND; 2394 scp->result = CHECK_CONDITION << 1; 2395 } 2396 } 2397 break; 2398 2399 case 0x08: 2400 2401 scp->result = DID_BUS_BUSY << 16 | status; 2402 break; 2403 2404 default: 2405 2406 /* 2407 * If TEST_UNIT_READY fails, we know RESERVATION_STATUS 2408 * failed 2409 */ 2410 if (scp->cmnd[0] == TEST_UNIT_READY) { 2411 scp->result = DID_ERROR << 16 | 2412 RESERVATION_CONFLICT << 1; 2413 } 2414 else 2415 /* 2416 * Error code returned is 1 if Reserve or Release 2417 * failed or the input parameter is invalid 2418 */ 2419 if (status == 1 && (scp->cmnd[0] == RESERVE || 2420 scp->cmnd[0] == RELEASE)) { 2421 2422 scp->result = DID_ERROR << 16 | 2423 RESERVATION_CONFLICT << 1; 2424 } 2425 else { 2426 scp->result = DID_BAD_TARGET << 16 | status; 2427 } 2428 } 2429 2430 // print a debug message for all failed commands 2431 if (status) { 2432 megaraid_mbox_display_scb(adapter, scb); 2433 } 2434 2435 // Free our internal resources and call the mid-layer callback 2436 // routine 2437 megaraid_mbox_sync_scb(adapter, scb); 2438 2439 // remove from local clist 2440 list_del_init(&scb->list); 2441 2442 // put back in free list 2443 megaraid_dealloc_scb(adapter, scb); 2444 2445 // send the scsi packet back to kernel 2446 scp->scsi_done(scp); 2447 } 2448 2449 return; 2450 } 2451 2452 2453 /** 2454 * megaraid_abort_handler - abort the scsi command 2455 * @scp : command to be aborted 2456 * 2457 * Abort a previous SCSI request. Only commands on the pending list can be 2458 * aborted. All the commands issued to the F/W must complete. 2459 **/ 2460 static int 2461 megaraid_abort_handler(struct scsi_cmnd *scp) 2462 { 2463 adapter_t *adapter; 2464 mraid_device_t *raid_dev; 2465 scb_t *scb; 2466 scb_t *tmp; 2467 int found; 2468 unsigned long flags; 2469 int i; 2470 2471 2472 adapter = SCP2ADAPTER(scp); 2473 raid_dev = ADAP2RAIDDEV(adapter); 2474 2475 con_log(CL_ANN, (KERN_WARNING 2476 "megaraid: aborting cmd=%x <c=%d t=%d l=%d>\n", 2477 scp->cmnd[0], SCP2CHANNEL(scp), 2478 SCP2TARGET(scp), SCP2LUN(scp))); 2479 2480 // If FW has stopped responding, simply return failure 2481 if (raid_dev->hw_error) { 2482 con_log(CL_ANN, (KERN_NOTICE 2483 "megaraid: hw error, not aborting\n")); 2484 return FAILED; 2485 } 2486 2487 // There might a race here, where the command was completed by the 2488 // firmware and now it is on the completed list. Before we could 2489 // complete the command to the kernel in dpc, the abort came. 2490 // Find out if this is the case to avoid the race. 2491 scb = NULL; 2492 spin_lock_irqsave(COMPLETED_LIST_LOCK(adapter), flags); 2493 list_for_each_entry_safe(scb, tmp, &adapter->completed_list, list) { 2494 2495 if (scb->scp == scp) { // Found command 2496 2497 list_del_init(&scb->list); // from completed list 2498 2499 con_log(CL_ANN, (KERN_WARNING 2500 "megaraid: %d[%d:%d], abort from completed list\n", 2501 scb->sno, scb->dev_channel, scb->dev_target)); 2502 2503 scp->result = (DID_ABORT << 16); 2504 scp->scsi_done(scp); 2505 2506 megaraid_dealloc_scb(adapter, scb); 2507 2508 spin_unlock_irqrestore(COMPLETED_LIST_LOCK(adapter), 2509 flags); 2510 2511 return SUCCESS; 2512 } 2513 } 2514 spin_unlock_irqrestore(COMPLETED_LIST_LOCK(adapter), flags); 2515 2516 2517 // Find out if this command is still on the pending list. If it is and 2518 // was never issued, abort and return success. If the command is owned 2519 // by the firmware, we must wait for it to complete by the FW. 2520 spin_lock_irqsave(PENDING_LIST_LOCK(adapter), flags); 2521 list_for_each_entry_safe(scb, tmp, &adapter->pend_list, list) { 2522 2523 if (scb->scp == scp) { // Found command 2524 2525 list_del_init(&scb->list); // from pending list 2526 2527 ASSERT(!(scb->state & SCB_ISSUED)); 2528 2529 con_log(CL_ANN, (KERN_WARNING 2530 "megaraid abort: [%d:%d], driver owner\n", 2531 scb->dev_channel, scb->dev_target)); 2532 2533 scp->result = (DID_ABORT << 16); 2534 scp->scsi_done(scp); 2535 2536 megaraid_dealloc_scb(adapter, scb); 2537 2538 spin_unlock_irqrestore(PENDING_LIST_LOCK(adapter), 2539 flags); 2540 2541 return SUCCESS; 2542 } 2543 } 2544 spin_unlock_irqrestore(PENDING_LIST_LOCK(adapter), flags); 2545 2546 2547 // Check do we even own this command, in which case this would be 2548 // owned by the firmware. The only way to locate the FW scb is to 2549 // traverse through the list of all SCB, since driver does not 2550 // maintain these SCBs on any list 2551 found = 0; 2552 spin_lock_irq(&adapter->lock); 2553 for (i = 0; i < MBOX_MAX_SCSI_CMDS; i++) { 2554 scb = adapter->kscb_list + i; 2555 2556 if (scb->scp == scp) { 2557 2558 found = 1; 2559 2560 if (!(scb->state & SCB_ISSUED)) { 2561 con_log(CL_ANN, (KERN_WARNING 2562 "megaraid abort: %d[%d:%d], invalid state\n", 2563 scb->sno, scb->dev_channel, scb->dev_target)); 2564 BUG(); 2565 } 2566 else { 2567 con_log(CL_ANN, (KERN_WARNING 2568 "megaraid abort: %d[%d:%d], fw owner\n", 2569 scb->sno, scb->dev_channel, scb->dev_target)); 2570 } 2571 } 2572 } 2573 spin_unlock_irq(&adapter->lock); 2574 2575 if (!found) { 2576 con_log(CL_ANN, (KERN_WARNING "megaraid abort: do now own\n")); 2577 2578 // FIXME: Should there be a callback for this command? 2579 return SUCCESS; 2580 } 2581 2582 // We cannot actually abort a command owned by firmware, return 2583 // failure and wait for reset. In host reset handler, we will find out 2584 // if the HBA is still live 2585 return FAILED; 2586 } 2587 2588 /** 2589 * megaraid_reset_handler - device reset hadler for mailbox based driver 2590 * @scp : reference command 2591 * 2592 * Reset handler for the mailbox based controller. First try to find out if 2593 * the FW is still live, in which case the outstanding commands counter mut go 2594 * down to 0. If that happens, also issue the reservation reset command to 2595 * relinquish (possible) reservations on the logical drives connected to this 2596 * host. 2597 **/ 2598 static int 2599 megaraid_reset_handler(struct scsi_cmnd *scp) 2600 { 2601 adapter_t *adapter; 2602 scb_t *scb; 2603 scb_t *tmp; 2604 mraid_device_t *raid_dev; 2605 unsigned long flags; 2606 uint8_t raw_mbox[sizeof(mbox_t)]; 2607 int rval; 2608 int recovery_window; 2609 int recovering; 2610 int i; 2611 uioc_t *kioc; 2612 2613 adapter = SCP2ADAPTER(scp); 2614 raid_dev = ADAP2RAIDDEV(adapter); 2615 2616 // return failure if adapter is not responding 2617 if (raid_dev->hw_error) { 2618 con_log(CL_ANN, (KERN_NOTICE 2619 "megaraid: hw error, cannot reset\n")); 2620 return FAILED; 2621 } 2622 2623 2624 // Under exceptional conditions, FW can take up to 3 minutes to 2625 // complete command processing. Wait for additional 2 minutes for the 2626 // pending commands counter to go down to 0. If it doesn't, let the 2627 // controller be marked offline 2628 // Also, reset all the commands currently owned by the driver 2629 spin_lock_irqsave(PENDING_LIST_LOCK(adapter), flags); 2630 list_for_each_entry_safe(scb, tmp, &adapter->pend_list, list) { 2631 list_del_init(&scb->list); // from pending list 2632 2633 if (scb->sno >= MBOX_MAX_SCSI_CMDS) { 2634 con_log(CL_ANN, (KERN_WARNING 2635 "megaraid: IOCTL packet with %d[%d:%d] being reset\n", 2636 scb->sno, scb->dev_channel, scb->dev_target)); 2637 2638 scb->status = -1; 2639 2640 kioc = (uioc_t *)scb->gp; 2641 kioc->status = -EFAULT; 2642 2643 megaraid_mbox_mm_done(adapter, scb); 2644 } else { 2645 if (scb->scp == scp) { // Found command 2646 con_log(CL_ANN, (KERN_WARNING 2647 "megaraid: %d[%d:%d], reset from pending list\n", 2648 scb->sno, scb->dev_channel, scb->dev_target)); 2649 } else { 2650 con_log(CL_ANN, (KERN_WARNING 2651 "megaraid: IO packet with %d[%d:%d] being reset\n", 2652 scb->sno, scb->dev_channel, scb->dev_target)); 2653 } 2654 2655 scb->scp->result = (DID_RESET << 16); 2656 scb->scp->scsi_done(scb->scp); 2657 2658 megaraid_dealloc_scb(adapter, scb); 2659 } 2660 } 2661 spin_unlock_irqrestore(PENDING_LIST_LOCK(adapter), flags); 2662 2663 if (adapter->outstanding_cmds) { 2664 con_log(CL_ANN, (KERN_NOTICE 2665 "megaraid: %d outstanding commands. Max wait %d sec\n", 2666 adapter->outstanding_cmds, 2667 (MBOX_RESET_WAIT + MBOX_RESET_EXT_WAIT))); 2668 } 2669 2670 recovery_window = MBOX_RESET_WAIT + MBOX_RESET_EXT_WAIT; 2671 2672 recovering = adapter->outstanding_cmds; 2673 2674 for (i = 0; i < recovery_window; i++) { 2675 2676 megaraid_ack_sequence(adapter); 2677 2678 // print a message once every 5 seconds only 2679 if (!(i % 5)) { 2680 con_log(CL_ANN, ( 2681 "megaraid mbox: Wait for %d commands to complete:%d\n", 2682 adapter->outstanding_cmds, 2683 (MBOX_RESET_WAIT + MBOX_RESET_EXT_WAIT) - i)); 2684 } 2685 2686 // bailout if no recovery happened in reset time 2687 if (adapter->outstanding_cmds == 0) { 2688 break; 2689 } 2690 2691 msleep(1000); 2692 } 2693 2694 spin_lock(&adapter->lock); 2695 2696 // If still outstanding commands, bail out 2697 if (adapter->outstanding_cmds) { 2698 con_log(CL_ANN, (KERN_WARNING 2699 "megaraid mbox: critical hardware error!\n")); 2700 2701 raid_dev->hw_error = 1; 2702 2703 rval = FAILED; 2704 goto out; 2705 } 2706 else { 2707 con_log(CL_ANN, (KERN_NOTICE 2708 "megaraid mbox: reset sequence completed successfully\n")); 2709 } 2710 2711 2712 // If the controller supports clustering, reset reservations 2713 if (!adapter->ha) { 2714 rval = SUCCESS; 2715 goto out; 2716 } 2717 2718 // clear reservations if any 2719 raw_mbox[0] = CLUSTER_CMD; 2720 raw_mbox[2] = RESET_RESERVATIONS; 2721 2722 rval = SUCCESS; 2723 if (mbox_post_sync_cmd_fast(adapter, raw_mbox) == 0) { 2724 con_log(CL_ANN, 2725 (KERN_INFO "megaraid: reservation reset\n")); 2726 } 2727 else { 2728 rval = FAILED; 2729 con_log(CL_ANN, (KERN_WARNING 2730 "megaraid: reservation reset failed\n")); 2731 } 2732 2733 out: 2734 spin_unlock(&adapter->lock); 2735 return rval; 2736 } 2737 2738 /* 2739 * START: internal commands library 2740 * 2741 * This section of the driver has the common routine used by the driver and 2742 * also has all the FW routines 2743 */ 2744 2745 /** 2746 * mbox_post_sync_cmd() - blocking command to the mailbox based controllers 2747 * @adapter : controller's soft state 2748 * @raw_mbox : the mailbox 2749 * 2750 * Issue a scb in synchronous and non-interrupt mode for mailbox based 2751 * controllers. 2752 */ 2753 static int 2754 mbox_post_sync_cmd(adapter_t *adapter, uint8_t raw_mbox[]) 2755 { 2756 mraid_device_t *raid_dev = ADAP2RAIDDEV(adapter); 2757 mbox64_t *mbox64; 2758 mbox_t *mbox; 2759 uint8_t status; 2760 int i; 2761 2762 2763 mbox64 = raid_dev->mbox64; 2764 mbox = raid_dev->mbox; 2765 2766 /* 2767 * Wait until mailbox is free 2768 */ 2769 if (megaraid_busywait_mbox(raid_dev) != 0) 2770 goto blocked_mailbox; 2771 2772 /* 2773 * Copy mailbox data into host structure 2774 */ 2775 memcpy((caddr_t)mbox, (caddr_t)raw_mbox, 16); 2776 mbox->cmdid = 0xFE; 2777 mbox->busy = 1; 2778 mbox->poll = 0; 2779 mbox->ack = 0; 2780 mbox->numstatus = 0xFF; 2781 mbox->status = 0xFF; 2782 2783 wmb(); 2784 WRINDOOR(raid_dev, raid_dev->mbox_dma | 0x1); 2785 2786 // wait for maximum 1 second for status to post. If the status is not 2787 // available within 1 second, assume FW is initializing and wait 2788 // for an extended amount of time 2789 if (mbox->numstatus == 0xFF) { // status not yet available 2790 udelay(25); 2791 2792 for (i = 0; mbox->numstatus == 0xFF && i < 1000; i++) { 2793 rmb(); 2794 msleep(1); 2795 } 2796 2797 2798 if (i == 1000) { 2799 con_log(CL_ANN, (KERN_NOTICE 2800 "megaraid mailbox: wait for FW to boot ")); 2801 2802 for (i = 0; (mbox->numstatus == 0xFF) && 2803 (i < MBOX_RESET_WAIT); i++) { 2804 rmb(); 2805 con_log(CL_ANN, ("\b\b\b\b\b[%03d]", 2806 MBOX_RESET_WAIT - i)); 2807 msleep(1000); 2808 } 2809 2810 if (i == MBOX_RESET_WAIT) { 2811 2812 con_log(CL_ANN, ( 2813 "\nmegaraid mailbox: status not available\n")); 2814 2815 return -1; 2816 } 2817 con_log(CL_ANN, ("\b\b\b\b\b[ok] \n")); 2818 } 2819 } 2820 2821 // wait for maximum 1 second for poll semaphore 2822 if (mbox->poll != 0x77) { 2823 udelay(25); 2824 2825 for (i = 0; (mbox->poll != 0x77) && (i < 1000); i++) { 2826 rmb(); 2827 msleep(1); 2828 } 2829 2830 if (i == 1000) { 2831 con_log(CL_ANN, (KERN_WARNING 2832 "megaraid mailbox: could not get poll semaphore\n")); 2833 return -1; 2834 } 2835 } 2836 2837 WRINDOOR(raid_dev, raid_dev->mbox_dma | 0x2); 2838 wmb(); 2839 2840 // wait for maximum 1 second for acknowledgement 2841 if (RDINDOOR(raid_dev) & 0x2) { 2842 udelay(25); 2843 2844 for (i = 0; (RDINDOOR(raid_dev) & 0x2) && (i < 1000); i++) { 2845 rmb(); 2846 msleep(1); 2847 } 2848 2849 if (i == 1000) { 2850 con_log(CL_ANN, (KERN_WARNING 2851 "megaraid mailbox: could not acknowledge\n")); 2852 return -1; 2853 } 2854 } 2855 mbox->poll = 0; 2856 mbox->ack = 0x77; 2857 2858 status = mbox->status; 2859 2860 // invalidate the completed command id array. After command 2861 // completion, firmware would write the valid id. 2862 mbox->numstatus = 0xFF; 2863 mbox->status = 0xFF; 2864 for (i = 0; i < MBOX_MAX_FIRMWARE_STATUS; i++) { 2865 mbox->completed[i] = 0xFF; 2866 } 2867 2868 return status; 2869 2870 blocked_mailbox: 2871 2872 con_log(CL_ANN, (KERN_WARNING "megaraid: blocked mailbox\n") ); 2873 return -1; 2874 } 2875 2876 2877 /** 2878 * mbox_post_sync_cmd_fast - blocking command to the mailbox based controllers 2879 * @adapter : controller's soft state 2880 * @raw_mbox : the mailbox 2881 * 2882 * Issue a scb in synchronous and non-interrupt mode for mailbox based 2883 * controllers. This is a faster version of the synchronous command and 2884 * therefore can be called in interrupt-context as well. 2885 */ 2886 static int 2887 mbox_post_sync_cmd_fast(adapter_t *adapter, uint8_t raw_mbox[]) 2888 { 2889 mraid_device_t *raid_dev = ADAP2RAIDDEV(adapter); 2890 mbox_t *mbox; 2891 long i; 2892 2893 2894 mbox = raid_dev->mbox; 2895 2896 // return immediately if the mailbox is busy 2897 if (mbox->busy) return -1; 2898 2899 // Copy mailbox data into host structure 2900 memcpy((caddr_t)mbox, (caddr_t)raw_mbox, 14); 2901 mbox->cmdid = 0xFE; 2902 mbox->busy = 1; 2903 mbox->poll = 0; 2904 mbox->ack = 0; 2905 mbox->numstatus = 0xFF; 2906 mbox->status = 0xFF; 2907 2908 wmb(); 2909 WRINDOOR(raid_dev, raid_dev->mbox_dma | 0x1); 2910 2911 for (i = 0; i < MBOX_SYNC_WAIT_CNT; i++) { 2912 if (mbox->numstatus != 0xFF) break; 2913 rmb(); 2914 udelay(MBOX_SYNC_DELAY_200); 2915 } 2916 2917 if (i == MBOX_SYNC_WAIT_CNT) { 2918 // We may need to re-calibrate the counter 2919 con_log(CL_ANN, (KERN_CRIT 2920 "megaraid: fast sync command timed out\n")); 2921 } 2922 2923 WRINDOOR(raid_dev, raid_dev->mbox_dma | 0x2); 2924 wmb(); 2925 2926 return mbox->status; 2927 } 2928 2929 2930 /** 2931 * megaraid_busywait_mbox() - Wait until the controller's mailbox is available 2932 * @raid_dev : RAID device (HBA) soft state 2933 * 2934 * Wait until the controller's mailbox is available to accept more commands. 2935 * Wait for at most 1 second. 2936 */ 2937 static int 2938 megaraid_busywait_mbox(mraid_device_t *raid_dev) 2939 { 2940 mbox_t *mbox = raid_dev->mbox; 2941 int i = 0; 2942 2943 if (mbox->busy) { 2944 udelay(25); 2945 for (i = 0; mbox->busy && i < 1000; i++) 2946 msleep(1); 2947 } 2948 2949 if (i < 1000) return 0; 2950 else return -1; 2951 } 2952 2953 2954 /** 2955 * megaraid_mbox_product_info - some static information about the controller 2956 * @adapter : our soft state 2957 * 2958 * Issue commands to the controller to grab some parameters required by our 2959 * caller. 2960 */ 2961 static int 2962 megaraid_mbox_product_info(adapter_t *adapter) 2963 { 2964 mraid_device_t *raid_dev = ADAP2RAIDDEV(adapter); 2965 mbox_t *mbox; 2966 uint8_t raw_mbox[sizeof(mbox_t)]; 2967 mraid_pinfo_t *pinfo; 2968 dma_addr_t pinfo_dma_h; 2969 mraid_inquiry3_t *mraid_inq3; 2970 int i; 2971 2972 2973 memset((caddr_t)raw_mbox, 0, sizeof(raw_mbox)); 2974 mbox = (mbox_t *)raw_mbox; 2975 2976 /* 2977 * Issue an ENQUIRY3 command to find out certain adapter parameters, 2978 * e.g., max channels, max commands etc. 2979 */ 2980 pinfo = pci_alloc_consistent(adapter->pdev, sizeof(mraid_pinfo_t), 2981 &pinfo_dma_h); 2982 2983 if (pinfo == NULL) { 2984 con_log(CL_ANN, (KERN_WARNING 2985 "megaraid: out of memory, %s %d\n", __func__, 2986 __LINE__)); 2987 2988 return -1; 2989 } 2990 memset(pinfo, 0, sizeof(mraid_pinfo_t)); 2991 2992 mbox->xferaddr = (uint32_t)adapter->ibuf_dma_h; 2993 memset((void *)adapter->ibuf, 0, MBOX_IBUF_SIZE); 2994 2995 raw_mbox[0] = FC_NEW_CONFIG; 2996 raw_mbox[2] = NC_SUBOP_ENQUIRY3; 2997 raw_mbox[3] = ENQ3_GET_SOLICITED_FULL; 2998 2999 // Issue the command 3000 if (mbox_post_sync_cmd(adapter, raw_mbox) != 0) { 3001 3002 con_log(CL_ANN, (KERN_WARNING "megaraid: Inquiry3 failed\n")); 3003 3004 pci_free_consistent(adapter->pdev, sizeof(mraid_pinfo_t), 3005 pinfo, pinfo_dma_h); 3006 3007 return -1; 3008 } 3009 3010 /* 3011 * Collect information about state of each physical drive 3012 * attached to the controller. We will expose all the disks 3013 * which are not part of RAID 3014 */ 3015 mraid_inq3 = (mraid_inquiry3_t *)adapter->ibuf; 3016 for (i = 0; i < MBOX_MAX_PHYSICAL_DRIVES; i++) { 3017 raid_dev->pdrv_state[i] = mraid_inq3->pdrv_state[i]; 3018 } 3019 3020 /* 3021 * Get product info for information like number of channels, 3022 * maximum commands supported. 3023 */ 3024 memset((caddr_t)raw_mbox, 0, sizeof(raw_mbox)); 3025 mbox->xferaddr = (uint32_t)pinfo_dma_h; 3026 3027 raw_mbox[0] = FC_NEW_CONFIG; 3028 raw_mbox[2] = NC_SUBOP_PRODUCT_INFO; 3029 3030 if (mbox_post_sync_cmd(adapter, raw_mbox) != 0) { 3031 3032 con_log(CL_ANN, (KERN_WARNING 3033 "megaraid: product info failed\n")); 3034 3035 pci_free_consistent(adapter->pdev, sizeof(mraid_pinfo_t), 3036 pinfo, pinfo_dma_h); 3037 3038 return -1; 3039 } 3040 3041 /* 3042 * Setup some parameters for host, as required by our caller 3043 */ 3044 adapter->max_channel = pinfo->nchannels; 3045 3046 /* 3047 * we will export all the logical drives on a single channel. 3048 * Add 1 since inquires do not come for inititor ID 3049 */ 3050 adapter->max_target = MAX_LOGICAL_DRIVES_40LD + 1; 3051 adapter->max_lun = 8; // up to 8 LUNs for non-disk devices 3052 3053 /* 3054 * These are the maximum outstanding commands for the scsi-layer 3055 */ 3056 adapter->max_cmds = MBOX_MAX_SCSI_CMDS; 3057 3058 memset(adapter->fw_version, 0, VERSION_SIZE); 3059 memset(adapter->bios_version, 0, VERSION_SIZE); 3060 3061 memcpy(adapter->fw_version, pinfo->fw_version, 4); 3062 adapter->fw_version[4] = 0; 3063 3064 memcpy(adapter->bios_version, pinfo->bios_version, 4); 3065 adapter->bios_version[4] = 0; 3066 3067 con_log(CL_ANN, (KERN_NOTICE 3068 "megaraid: fw version:[%s] bios version:[%s]\n", 3069 adapter->fw_version, adapter->bios_version)); 3070 3071 pci_free_consistent(adapter->pdev, sizeof(mraid_pinfo_t), pinfo, 3072 pinfo_dma_h); 3073 3074 return 0; 3075 } 3076 3077 3078 3079 /** 3080 * megaraid_mbox_extended_cdb - check for support for extended CDBs 3081 * @adapter : soft state for the controller 3082 * 3083 * This routine check whether the controller in question supports extended 3084 * ( > 10 bytes ) CDBs. 3085 */ 3086 static int 3087 megaraid_mbox_extended_cdb(adapter_t *adapter) 3088 { 3089 mbox_t *mbox; 3090 uint8_t raw_mbox[sizeof(mbox_t)]; 3091 int rval; 3092 3093 mbox = (mbox_t *)raw_mbox; 3094 3095 memset((caddr_t)raw_mbox, 0, sizeof(raw_mbox)); 3096 mbox->xferaddr = (uint32_t)adapter->ibuf_dma_h; 3097 3098 memset((void *)adapter->ibuf, 0, MBOX_IBUF_SIZE); 3099 3100 raw_mbox[0] = MAIN_MISC_OPCODE; 3101 raw_mbox[2] = SUPPORT_EXT_CDB; 3102 3103 /* 3104 * Issue the command 3105 */ 3106 rval = 0; 3107 if (mbox_post_sync_cmd(adapter, raw_mbox) != 0) { 3108 rval = -1; 3109 } 3110 3111 return rval; 3112 } 3113 3114 3115 /** 3116 * megaraid_mbox_support_ha - Do we support clustering 3117 * @adapter : soft state for the controller 3118 * @init_id : ID of the initiator 3119 * 3120 * Determine if the firmware supports clustering and the ID of the initiator. 3121 */ 3122 static int 3123 megaraid_mbox_support_ha(adapter_t *adapter, uint16_t *init_id) 3124 { 3125 mbox_t *mbox; 3126 uint8_t raw_mbox[sizeof(mbox_t)]; 3127 int rval; 3128 3129 3130 mbox = (mbox_t *)raw_mbox; 3131 3132 memset((caddr_t)raw_mbox, 0, sizeof(raw_mbox)); 3133 3134 mbox->xferaddr = (uint32_t)adapter->ibuf_dma_h; 3135 3136 memset((void *)adapter->ibuf, 0, MBOX_IBUF_SIZE); 3137 3138 raw_mbox[0] = GET_TARGET_ID; 3139 3140 // Issue the command 3141 *init_id = 7; 3142 rval = -1; 3143 if (mbox_post_sync_cmd(adapter, raw_mbox) == 0) { 3144 3145 *init_id = *(uint8_t *)adapter->ibuf; 3146 3147 con_log(CL_ANN, (KERN_INFO 3148 "megaraid: cluster firmware, initiator ID: %d\n", 3149 *init_id)); 3150 3151 rval = 0; 3152 } 3153 3154 return rval; 3155 } 3156 3157 3158 /** 3159 * megaraid_mbox_support_random_del - Do we support random deletion 3160 * @adapter : soft state for the controller 3161 * 3162 * Determine if the firmware supports random deletion. 3163 * Return: 1 is operation supported, 0 otherwise 3164 */ 3165 static int 3166 megaraid_mbox_support_random_del(adapter_t *adapter) 3167 { 3168 mbox_t *mbox; 3169 uint8_t raw_mbox[sizeof(mbox_t)]; 3170 int rval; 3171 3172 /* 3173 * Newer firmware on Dell CERC expect a different 3174 * random deletion handling, so disable it. 3175 */ 3176 if (adapter->pdev->vendor == PCI_VENDOR_ID_AMI && 3177 adapter->pdev->device == PCI_DEVICE_ID_AMI_MEGARAID3 && 3178 adapter->pdev->subsystem_vendor == PCI_VENDOR_ID_DELL && 3179 adapter->pdev->subsystem_device == PCI_SUBSYS_ID_CERC_ATA100_4CH && 3180 (adapter->fw_version[0] > '6' || 3181 (adapter->fw_version[0] == '6' && 3182 adapter->fw_version[2] > '6') || 3183 (adapter->fw_version[0] == '6' 3184 && adapter->fw_version[2] == '6' 3185 && adapter->fw_version[3] > '1'))) { 3186 con_log(CL_DLEVEL1, ("megaraid: disable random deletion\n")); 3187 return 0; 3188 } 3189 3190 mbox = (mbox_t *)raw_mbox; 3191 3192 memset((caddr_t)raw_mbox, 0, sizeof(mbox_t)); 3193 3194 raw_mbox[0] = FC_DEL_LOGDRV; 3195 raw_mbox[2] = OP_SUP_DEL_LOGDRV; 3196 3197 // Issue the command 3198 rval = 0; 3199 if (mbox_post_sync_cmd(adapter, raw_mbox) == 0) { 3200 3201 con_log(CL_DLEVEL1, ("megaraid: supports random deletion\n")); 3202 3203 rval = 1; 3204 } 3205 3206 return rval; 3207 } 3208 3209 3210 /** 3211 * megaraid_mbox_get_max_sg - maximum sg elements supported by the firmware 3212 * @adapter : soft state for the controller 3213 * 3214 * Find out the maximum number of scatter-gather elements supported by the 3215 * firmware. 3216 */ 3217 static int 3218 megaraid_mbox_get_max_sg(adapter_t *adapter) 3219 { 3220 mbox_t *mbox; 3221 uint8_t raw_mbox[sizeof(mbox_t)]; 3222 int nsg; 3223 3224 3225 mbox = (mbox_t *)raw_mbox; 3226 3227 memset((caddr_t)raw_mbox, 0, sizeof(mbox_t)); 3228 3229 mbox->xferaddr = (uint32_t)adapter->ibuf_dma_h; 3230 3231 memset((void *)adapter->ibuf, 0, MBOX_IBUF_SIZE); 3232 3233 raw_mbox[0] = MAIN_MISC_OPCODE; 3234 raw_mbox[2] = GET_MAX_SG_SUPPORT; 3235 3236 // Issue the command 3237 if (mbox_post_sync_cmd(adapter, raw_mbox) == 0) { 3238 nsg = *(uint8_t *)adapter->ibuf; 3239 } 3240 else { 3241 nsg = MBOX_DEFAULT_SG_SIZE; 3242 } 3243 3244 if (nsg > MBOX_MAX_SG_SIZE) nsg = MBOX_MAX_SG_SIZE; 3245 3246 return nsg; 3247 } 3248 3249 3250 /** 3251 * megaraid_mbox_enum_raid_scsi - enumerate the RAID and SCSI channels 3252 * @adapter : soft state for the controller 3253 * 3254 * Enumerate the RAID and SCSI channels for ROMB platforms so that channels 3255 * can be exported as regular SCSI channels. 3256 */ 3257 static void 3258 megaraid_mbox_enum_raid_scsi(adapter_t *adapter) 3259 { 3260 mraid_device_t *raid_dev = ADAP2RAIDDEV(adapter); 3261 mbox_t *mbox; 3262 uint8_t raw_mbox[sizeof(mbox_t)]; 3263 3264 3265 mbox = (mbox_t *)raw_mbox; 3266 3267 memset((caddr_t)raw_mbox, 0, sizeof(mbox_t)); 3268 3269 mbox->xferaddr = (uint32_t)adapter->ibuf_dma_h; 3270 3271 memset((void *)adapter->ibuf, 0, MBOX_IBUF_SIZE); 3272 3273 raw_mbox[0] = CHNL_CLASS; 3274 raw_mbox[2] = GET_CHNL_CLASS; 3275 3276 // Issue the command. If the command fails, all channels are RAID 3277 // channels 3278 raid_dev->channel_class = 0xFF; 3279 if (mbox_post_sync_cmd(adapter, raw_mbox) == 0) { 3280 raid_dev->channel_class = *(uint8_t *)adapter->ibuf; 3281 } 3282 3283 return; 3284 } 3285 3286 3287 /** 3288 * megaraid_mbox_flush_cache - flush adapter and disks cache 3289 * @adapter : soft state for the controller 3290 * 3291 * Flush adapter cache followed by disks cache. 3292 */ 3293 static void 3294 megaraid_mbox_flush_cache(adapter_t *adapter) 3295 { 3296 mbox_t *mbox; 3297 uint8_t raw_mbox[sizeof(mbox_t)]; 3298 3299 3300 mbox = (mbox_t *)raw_mbox; 3301 3302 memset((caddr_t)raw_mbox, 0, sizeof(mbox_t)); 3303 3304 raw_mbox[0] = FLUSH_ADAPTER; 3305 3306 if (mbox_post_sync_cmd(adapter, raw_mbox) != 0) { 3307 con_log(CL_ANN, ("megaraid: flush adapter failed\n")); 3308 } 3309 3310 raw_mbox[0] = FLUSH_SYSTEM; 3311 3312 if (mbox_post_sync_cmd(adapter, raw_mbox) != 0) { 3313 con_log(CL_ANN, ("megaraid: flush disks cache failed\n")); 3314 } 3315 3316 return; 3317 } 3318 3319 3320 /** 3321 * megaraid_mbox_fire_sync_cmd - fire the sync cmd 3322 * @adapter : soft state for the controller 3323 * 3324 * Clears the pending cmds in FW and reinits its RAID structs. 3325 */ 3326 static int 3327 megaraid_mbox_fire_sync_cmd(adapter_t *adapter) 3328 { 3329 mbox_t *mbox; 3330 uint8_t raw_mbox[sizeof(mbox_t)]; 3331 mraid_device_t *raid_dev = ADAP2RAIDDEV(adapter); 3332 mbox64_t *mbox64; 3333 int status = 0; 3334 int i; 3335 uint32_t dword; 3336 3337 mbox = (mbox_t *)raw_mbox; 3338 3339 memset((caddr_t)raw_mbox, 0, sizeof(mbox_t)); 3340 3341 raw_mbox[0] = 0xFF; 3342 3343 mbox64 = raid_dev->mbox64; 3344 mbox = raid_dev->mbox; 3345 3346 /* Wait until mailbox is free */ 3347 if (megaraid_busywait_mbox(raid_dev) != 0) { 3348 status = 1; 3349 goto blocked_mailbox; 3350 } 3351 3352 /* Copy mailbox data into host structure */ 3353 memcpy((caddr_t)mbox, (caddr_t)raw_mbox, 16); 3354 mbox->cmdid = 0xFE; 3355 mbox->busy = 1; 3356 mbox->poll = 0; 3357 mbox->ack = 0; 3358 mbox->numstatus = 0; 3359 mbox->status = 0; 3360 3361 wmb(); 3362 WRINDOOR(raid_dev, raid_dev->mbox_dma | 0x1); 3363 3364 /* Wait for maximum 1 min for status to post. 3365 * If the Firmware SUPPORTS the ABOVE COMMAND, 3366 * mbox->cmd will be set to 0 3367 * else 3368 * the firmware will reject the command with 3369 * mbox->numstatus set to 1 3370 */ 3371 3372 i = 0; 3373 status = 0; 3374 while (!mbox->numstatus && mbox->cmd == 0xFF) { 3375 rmb(); 3376 msleep(1); 3377 i++; 3378 if (i > 1000 * 60) { 3379 status = 1; 3380 break; 3381 } 3382 } 3383 if (mbox->numstatus == 1) 3384 status = 1; /*cmd not supported*/ 3385 3386 /* Check for interrupt line */ 3387 dword = RDOUTDOOR(raid_dev); 3388 WROUTDOOR(raid_dev, dword); 3389 WRINDOOR(raid_dev,2); 3390 3391 return status; 3392 3393 blocked_mailbox: 3394 con_log(CL_ANN, (KERN_WARNING "megaraid: blocked mailbox\n")); 3395 return status; 3396 } 3397 3398 /** 3399 * megaraid_mbox_display_scb - display SCB information, mostly debug purposes 3400 * @adapter : controller's soft state 3401 * @scb : SCB to be displayed 3402 * @level : debug level for console print 3403 * 3404 * Diplay information about the given SCB iff the current debug level is 3405 * verbose. 3406 */ 3407 static void 3408 megaraid_mbox_display_scb(adapter_t *adapter, scb_t *scb) 3409 { 3410 mbox_ccb_t *ccb; 3411 struct scsi_cmnd *scp; 3412 mbox_t *mbox; 3413 int level; 3414 int i; 3415 3416 3417 ccb = (mbox_ccb_t *)scb->ccb; 3418 scp = scb->scp; 3419 mbox = ccb->mbox; 3420 3421 level = CL_DLEVEL3; 3422 3423 con_log(level, (KERN_NOTICE 3424 "megaraid mailbox: status:%#x cmd:%#x id:%#x ", scb->status, 3425 mbox->cmd, scb->sno)); 3426 3427 con_log(level, ("sec:%#x lba:%#x addr:%#x ld:%d sg:%d\n", 3428 mbox->numsectors, mbox->lba, mbox->xferaddr, mbox->logdrv, 3429 mbox->numsge)); 3430 3431 if (!scp) return; 3432 3433 con_log(level, (KERN_NOTICE "scsi cmnd: ")); 3434 3435 for (i = 0; i < scp->cmd_len; i++) { 3436 con_log(level, ("%#2.02x ", scp->cmnd[i])); 3437 } 3438 3439 con_log(level, ("\n")); 3440 3441 return; 3442 } 3443 3444 3445 /** 3446 * megaraid_mbox_setup_device_map - manage device ids 3447 * @adapter : Driver's soft state 3448 * 3449 * Manange the device ids to have an appropriate mapping between the kernel 3450 * scsi addresses and megaraid scsi and logical drive addresses. We export 3451 * scsi devices on their actual addresses, whereas the logical drives are 3452 * exported on a virtual scsi channel. 3453 */ 3454 static void 3455 megaraid_mbox_setup_device_map(adapter_t *adapter) 3456 { 3457 uint8_t c; 3458 uint8_t t; 3459 3460 /* 3461 * First fill the values on the logical drive channel 3462 */ 3463 for (t = 0; t < LSI_MAX_LOGICAL_DRIVES_64LD; t++) 3464 adapter->device_ids[adapter->max_channel][t] = 3465 (t < adapter->init_id) ? t : t - 1; 3466 3467 adapter->device_ids[adapter->max_channel][adapter->init_id] = 0xFF; 3468 3469 /* 3470 * Fill the values on the physical devices channels 3471 */ 3472 for (c = 0; c < adapter->max_channel; c++) 3473 for (t = 0; t < LSI_MAX_LOGICAL_DRIVES_64LD; t++) 3474 adapter->device_ids[c][t] = (c << 8) | t; 3475 } 3476 3477 3478 /* 3479 * END: internal commands library 3480 */ 3481 3482 /* 3483 * START: Interface for the common management module 3484 * 3485 * This is the module, which interfaces with the common management module to 3486 * provide support for ioctl and sysfs 3487 */ 3488 3489 /** 3490 * megaraid_cmm_register - register with the management module 3491 * @adapter : HBA soft state 3492 * 3493 * Register with the management module, which allows applications to issue 3494 * ioctl calls to the drivers. This interface is used by the management module 3495 * to setup sysfs support as well. 3496 */ 3497 static int 3498 megaraid_cmm_register(adapter_t *adapter) 3499 { 3500 mraid_device_t *raid_dev = ADAP2RAIDDEV(adapter); 3501 mraid_mmadp_t adp; 3502 scb_t *scb; 3503 mbox_ccb_t *ccb; 3504 int rval; 3505 int i; 3506 3507 // Allocate memory for the base list of scb for management module. 3508 adapter->uscb_list = kcalloc(MBOX_MAX_USER_CMDS, sizeof(scb_t), GFP_KERNEL); 3509 3510 if (adapter->uscb_list == NULL) { 3511 con_log(CL_ANN, (KERN_WARNING 3512 "megaraid: out of memory, %s %d\n", __func__, 3513 __LINE__)); 3514 return -1; 3515 } 3516 3517 3518 // Initialize the synchronization parameters for resources for 3519 // commands for management module 3520 INIT_LIST_HEAD(&adapter->uscb_pool); 3521 3522 spin_lock_init(USER_FREE_LIST_LOCK(adapter)); 3523 3524 3525 3526 // link all the packets. Note, CCB for commands, coming from the 3527 // commom management module, mailbox physical address are already 3528 // setup by it. We just need placeholder for that in our local command 3529 // control blocks 3530 for (i = 0; i < MBOX_MAX_USER_CMDS; i++) { 3531 3532 scb = adapter->uscb_list + i; 3533 ccb = raid_dev->uccb_list + i; 3534 3535 scb->ccb = (caddr_t)ccb; 3536 ccb->mbox64 = raid_dev->umbox64 + i; 3537 ccb->mbox = &ccb->mbox64->mbox32; 3538 ccb->raw_mbox = (uint8_t *)ccb->mbox; 3539 3540 scb->gp = 0; 3541 3542 // COMMAND ID 0 - (MBOX_MAX_SCSI_CMDS-1) ARE RESERVED FOR 3543 // COMMANDS COMING FROM IO SUBSYSTEM (MID-LAYER) 3544 scb->sno = i + MBOX_MAX_SCSI_CMDS; 3545 3546 scb->scp = NULL; 3547 scb->state = SCB_FREE; 3548 scb->dma_direction = PCI_DMA_NONE; 3549 scb->dma_type = MRAID_DMA_NONE; 3550 scb->dev_channel = -1; 3551 scb->dev_target = -1; 3552 3553 // put scb in the free pool 3554 list_add_tail(&scb->list, &adapter->uscb_pool); 3555 } 3556 3557 adp.unique_id = adapter->unique_id; 3558 adp.drvr_type = DRVRTYPE_MBOX; 3559 adp.drvr_data = (unsigned long)adapter; 3560 adp.pdev = adapter->pdev; 3561 adp.issue_uioc = megaraid_mbox_mm_handler; 3562 adp.timeout = MBOX_RESET_WAIT + MBOX_RESET_EXT_WAIT; 3563 adp.max_kioc = MBOX_MAX_USER_CMDS; 3564 3565 if ((rval = mraid_mm_register_adp(&adp)) != 0) { 3566 3567 con_log(CL_ANN, (KERN_WARNING 3568 "megaraid mbox: did not register with CMM\n")); 3569 3570 kfree(adapter->uscb_list); 3571 } 3572 3573 return rval; 3574 } 3575 3576 3577 /** 3578 * megaraid_cmm_unregister - un-register with the management module 3579 * @adapter : HBA soft state 3580 * 3581 * Un-register with the management module. 3582 * FIXME: mgmt module must return failure for unregister if it has pending 3583 * commands in LLD. 3584 */ 3585 static int 3586 megaraid_cmm_unregister(adapter_t *adapter) 3587 { 3588 kfree(adapter->uscb_list); 3589 mraid_mm_unregister_adp(adapter->unique_id); 3590 return 0; 3591 } 3592 3593 3594 /** 3595 * megaraid_mbox_mm_handler - interface for CMM to issue commands to LLD 3596 * @drvr_data : LLD specific data 3597 * @kioc : CMM interface packet 3598 * @action : command action 3599 * 3600 * This routine is invoked whenever the Common Management Module (CMM) has a 3601 * command for us. The 'action' parameter specifies if this is a new command 3602 * or otherwise. 3603 */ 3604 static int 3605 megaraid_mbox_mm_handler(unsigned long drvr_data, uioc_t *kioc, uint32_t action) 3606 { 3607 adapter_t *adapter; 3608 3609 if (action != IOCTL_ISSUE) { 3610 con_log(CL_ANN, (KERN_WARNING 3611 "megaraid: unsupported management action:%#2x\n", 3612 action)); 3613 return (-ENOTSUPP); 3614 } 3615 3616 adapter = (adapter_t *)drvr_data; 3617 3618 // make sure this adapter is not being detached right now. 3619 if (atomic_read(&adapter->being_detached)) { 3620 con_log(CL_ANN, (KERN_WARNING 3621 "megaraid: reject management request, detaching\n")); 3622 return (-ENODEV); 3623 } 3624 3625 switch (kioc->opcode) { 3626 3627 case GET_ADAP_INFO: 3628 3629 kioc->status = gather_hbainfo(adapter, (mraid_hba_info_t *) 3630 (unsigned long)kioc->buf_vaddr); 3631 3632 kioc->done(kioc); 3633 3634 return kioc->status; 3635 3636 case MBOX_CMD: 3637 3638 return megaraid_mbox_mm_command(adapter, kioc); 3639 3640 default: 3641 kioc->status = (-EINVAL); 3642 kioc->done(kioc); 3643 return (-EINVAL); 3644 } 3645 3646 return 0; // not reached 3647 } 3648 3649 /** 3650 * megaraid_mbox_mm_command - issues commands routed through CMM 3651 * @adapter : HBA soft state 3652 * @kioc : management command packet 3653 * 3654 * Issues commands, which are routed through the management module. 3655 */ 3656 static int 3657 megaraid_mbox_mm_command(adapter_t *adapter, uioc_t *kioc) 3658 { 3659 struct list_head *head = &adapter->uscb_pool; 3660 mbox64_t *mbox64; 3661 uint8_t *raw_mbox; 3662 scb_t *scb; 3663 mbox_ccb_t *ccb; 3664 unsigned long flags; 3665 3666 // detach one scb from free pool 3667 spin_lock_irqsave(USER_FREE_LIST_LOCK(adapter), flags); 3668 3669 if (list_empty(head)) { // should never happen because of CMM 3670 3671 con_log(CL_ANN, (KERN_WARNING 3672 "megaraid mbox: bug in cmm handler, lost resources\n")); 3673 3674 spin_unlock_irqrestore(USER_FREE_LIST_LOCK(adapter), flags); 3675 3676 return (-EINVAL); 3677 } 3678 3679 scb = list_entry(head->next, scb_t, list); 3680 list_del_init(&scb->list); 3681 3682 spin_unlock_irqrestore(USER_FREE_LIST_LOCK(adapter), flags); 3683 3684 scb->state = SCB_ACTIVE; 3685 scb->dma_type = MRAID_DMA_NONE; 3686 scb->dma_direction = PCI_DMA_NONE; 3687 3688 ccb = (mbox_ccb_t *)scb->ccb; 3689 mbox64 = (mbox64_t *)(unsigned long)kioc->cmdbuf; 3690 raw_mbox = (uint8_t *)&mbox64->mbox32; 3691 3692 memcpy(ccb->mbox64, mbox64, sizeof(mbox64_t)); 3693 3694 scb->gp = (unsigned long)kioc; 3695 3696 /* 3697 * If it is a logdrv random delete operation, we have to wait till 3698 * there are no outstanding cmds at the fw and then issue it directly 3699 */ 3700 if (raw_mbox[0] == FC_DEL_LOGDRV && raw_mbox[2] == OP_DEL_LOGDRV) { 3701 3702 if (wait_till_fw_empty(adapter)) { 3703 con_log(CL_ANN, (KERN_NOTICE 3704 "megaraid mbox: LD delete, timed out\n")); 3705 3706 kioc->status = -ETIME; 3707 3708 scb->status = -1; 3709 3710 megaraid_mbox_mm_done(adapter, scb); 3711 3712 return (-ETIME); 3713 } 3714 3715 INIT_LIST_HEAD(&scb->list); 3716 3717 scb->state = SCB_ISSUED; 3718 if (mbox_post_cmd(adapter, scb) != 0) { 3719 3720 con_log(CL_ANN, (KERN_NOTICE 3721 "megaraid mbox: LD delete, mailbox busy\n")); 3722 3723 kioc->status = -EBUSY; 3724 3725 scb->status = -1; 3726 3727 megaraid_mbox_mm_done(adapter, scb); 3728 3729 return (-EBUSY); 3730 } 3731 3732 return 0; 3733 } 3734 3735 // put the command on the pending list and execute 3736 megaraid_mbox_runpendq(adapter, scb); 3737 3738 return 0; 3739 } 3740 3741 3742 static int 3743 wait_till_fw_empty(adapter_t *adapter) 3744 { 3745 unsigned long flags = 0; 3746 int i; 3747 3748 3749 /* 3750 * Set the quiescent flag to stop issuing cmds to FW. 3751 */ 3752 spin_lock_irqsave(&adapter->lock, flags); 3753 adapter->quiescent++; 3754 spin_unlock_irqrestore(&adapter->lock, flags); 3755 3756 /* 3757 * Wait till there are no more cmds outstanding at FW. Try for at most 3758 * 60 seconds 3759 */ 3760 for (i = 0; i < 60 && adapter->outstanding_cmds; i++) { 3761 con_log(CL_DLEVEL1, (KERN_INFO 3762 "megaraid: FW has %d pending commands\n", 3763 adapter->outstanding_cmds)); 3764 3765 msleep(1000); 3766 } 3767 3768 return adapter->outstanding_cmds; 3769 } 3770 3771 3772 /** 3773 * megaraid_mbox_mm_done - callback for CMM commands 3774 * @adapter : HBA soft state 3775 * @scb : completed command 3776 * 3777 * Callback routine for internal commands originated from the management 3778 * module. 3779 */ 3780 static void 3781 megaraid_mbox_mm_done(adapter_t *adapter, scb_t *scb) 3782 { 3783 uioc_t *kioc; 3784 mbox64_t *mbox64; 3785 uint8_t *raw_mbox; 3786 unsigned long flags; 3787 3788 kioc = (uioc_t *)scb->gp; 3789 mbox64 = (mbox64_t *)(unsigned long)kioc->cmdbuf; 3790 mbox64->mbox32.status = scb->status; 3791 raw_mbox = (uint8_t *)&mbox64->mbox32; 3792 3793 3794 // put scb in the free pool 3795 scb->state = SCB_FREE; 3796 scb->scp = NULL; 3797 3798 spin_lock_irqsave(USER_FREE_LIST_LOCK(adapter), flags); 3799 3800 list_add(&scb->list, &adapter->uscb_pool); 3801 3802 spin_unlock_irqrestore(USER_FREE_LIST_LOCK(adapter), flags); 3803 3804 // if a delete logical drive operation succeeded, restart the 3805 // controller 3806 if (raw_mbox[0] == FC_DEL_LOGDRV && raw_mbox[2] == OP_DEL_LOGDRV) { 3807 3808 adapter->quiescent--; 3809 3810 megaraid_mbox_runpendq(adapter, NULL); 3811 } 3812 3813 kioc->done(kioc); 3814 3815 return; 3816 } 3817 3818 3819 /** 3820 * gather_hbainfo - HBA characteristics for the applications 3821 * @adapter : HBA soft state 3822 * @hinfo : pointer to the caller's host info strucuture 3823 */ 3824 static int 3825 gather_hbainfo(adapter_t *adapter, mraid_hba_info_t *hinfo) 3826 { 3827 uint8_t dmajor; 3828 3829 dmajor = megaraid_mbox_version[0]; 3830 3831 hinfo->pci_vendor_id = adapter->pdev->vendor; 3832 hinfo->pci_device_id = adapter->pdev->device; 3833 hinfo->subsys_vendor_id = adapter->pdev->subsystem_vendor; 3834 hinfo->subsys_device_id = adapter->pdev->subsystem_device; 3835 3836 hinfo->pci_bus = adapter->pdev->bus->number; 3837 hinfo->pci_dev_fn = adapter->pdev->devfn; 3838 hinfo->pci_slot = PCI_SLOT(adapter->pdev->devfn); 3839 hinfo->irq = adapter->host->irq; 3840 hinfo->baseport = ADAP2RAIDDEV(adapter)->baseport; 3841 3842 hinfo->unique_id = (hinfo->pci_bus << 8) | adapter->pdev->devfn; 3843 hinfo->host_no = adapter->host->host_no; 3844 3845 return 0; 3846 } 3847 3848 /* 3849 * END: Interface for the common management module 3850 */ 3851 3852 3853 3854 /** 3855 * megaraid_sysfs_alloc_resources - allocate sysfs related resources 3856 * @adapter : controller's soft state 3857 * 3858 * Allocate packets required to issue FW calls whenever the sysfs attributes 3859 * are read. These attributes would require up-to-date information from the 3860 * FW. Also set up resources for mutual exclusion to share these resources and 3861 * the wait queue. 3862 * 3863 * Return 0 on success. 3864 * Return -ERROR_CODE on failure. 3865 */ 3866 static int 3867 megaraid_sysfs_alloc_resources(adapter_t *adapter) 3868 { 3869 mraid_device_t *raid_dev = ADAP2RAIDDEV(adapter); 3870 int rval = 0; 3871 3872 raid_dev->sysfs_uioc = kmalloc(sizeof(uioc_t), GFP_KERNEL); 3873 3874 raid_dev->sysfs_mbox64 = kmalloc(sizeof(mbox64_t), GFP_KERNEL); 3875 3876 raid_dev->sysfs_buffer = pci_alloc_consistent(adapter->pdev, 3877 PAGE_SIZE, &raid_dev->sysfs_buffer_dma); 3878 3879 if (!raid_dev->sysfs_uioc || !raid_dev->sysfs_mbox64 || 3880 !raid_dev->sysfs_buffer) { 3881 3882 con_log(CL_ANN, (KERN_WARNING 3883 "megaraid: out of memory, %s %d\n", __func__, 3884 __LINE__)); 3885 3886 rval = -ENOMEM; 3887 3888 megaraid_sysfs_free_resources(adapter); 3889 } 3890 3891 mutex_init(&raid_dev->sysfs_mtx); 3892 3893 init_waitqueue_head(&raid_dev->sysfs_wait_q); 3894 3895 return rval; 3896 } 3897 3898 3899 /** 3900 * megaraid_sysfs_free_resources - free sysfs related resources 3901 * @adapter : controller's soft state 3902 * 3903 * Free packets allocated for sysfs FW commands 3904 */ 3905 static void 3906 megaraid_sysfs_free_resources(adapter_t *adapter) 3907 { 3908 mraid_device_t *raid_dev = ADAP2RAIDDEV(adapter); 3909 3910 kfree(raid_dev->sysfs_uioc); 3911 kfree(raid_dev->sysfs_mbox64); 3912 3913 if (raid_dev->sysfs_buffer) { 3914 pci_free_consistent(adapter->pdev, PAGE_SIZE, 3915 raid_dev->sysfs_buffer, raid_dev->sysfs_buffer_dma); 3916 } 3917 } 3918 3919 3920 /** 3921 * megaraid_sysfs_get_ldmap_done - callback for get ldmap 3922 * @uioc : completed packet 3923 * 3924 * Callback routine called in the ISR/tasklet context for get ldmap call 3925 */ 3926 static void 3927 megaraid_sysfs_get_ldmap_done(uioc_t *uioc) 3928 { 3929 adapter_t *adapter = (adapter_t *)uioc->buf_vaddr; 3930 mraid_device_t *raid_dev = ADAP2RAIDDEV(adapter); 3931 3932 uioc->status = 0; 3933 3934 wake_up(&raid_dev->sysfs_wait_q); 3935 } 3936 3937 3938 /** 3939 * megaraid_sysfs_get_ldmap_timeout - timeout handling for get ldmap 3940 * @data : timed out packet 3941 * 3942 * Timeout routine to recover and return to application, in case the adapter 3943 * has stopped responding. A timeout of 60 seconds for this command seems like 3944 * a good value. 3945 */ 3946 static void 3947 megaraid_sysfs_get_ldmap_timeout(unsigned long data) 3948 { 3949 uioc_t *uioc = (uioc_t *)data; 3950 adapter_t *adapter = (adapter_t *)uioc->buf_vaddr; 3951 mraid_device_t *raid_dev = ADAP2RAIDDEV(adapter); 3952 3953 uioc->status = -ETIME; 3954 3955 wake_up(&raid_dev->sysfs_wait_q); 3956 } 3957 3958 3959 /** 3960 * megaraid_sysfs_get_ldmap - get update logical drive map 3961 * @adapter : controller's soft state 3962 * 3963 * This routine will be called whenever user reads the logical drive 3964 * attributes, go get the current logical drive mapping table from the 3965 * firmware. We use the management API's to issue commands to the controller. 3966 * 3967 * NOTE: The commands issuance functionality is not generalized and 3968 * implemented in context of "get ld map" command only. If required, the 3969 * command issuance logical can be trivially pulled out and implemented as a 3970 * standalone library. For now, this should suffice since there is no other 3971 * user of this interface. 3972 * 3973 * Return 0 on success. 3974 * Return -1 on failure. 3975 */ 3976 static int 3977 megaraid_sysfs_get_ldmap(adapter_t *adapter) 3978 { 3979 mraid_device_t *raid_dev = ADAP2RAIDDEV(adapter); 3980 uioc_t *uioc; 3981 mbox64_t *mbox64; 3982 mbox_t *mbox; 3983 char *raw_mbox; 3984 struct timer_list sysfs_timer; 3985 struct timer_list *timerp; 3986 caddr_t ldmap; 3987 int rval = 0; 3988 3989 /* 3990 * Allow only one read at a time to go through the sysfs attributes 3991 */ 3992 mutex_lock(&raid_dev->sysfs_mtx); 3993 3994 uioc = raid_dev->sysfs_uioc; 3995 mbox64 = raid_dev->sysfs_mbox64; 3996 ldmap = raid_dev->sysfs_buffer; 3997 3998 memset(uioc, 0, sizeof(uioc_t)); 3999 memset(mbox64, 0, sizeof(mbox64_t)); 4000 memset(ldmap, 0, sizeof(raid_dev->curr_ldmap)); 4001 4002 mbox = &mbox64->mbox32; 4003 raw_mbox = (char *)mbox; 4004 uioc->cmdbuf = (uint64_t)(unsigned long)mbox64; 4005 uioc->buf_vaddr = (caddr_t)adapter; 4006 uioc->status = -ENODATA; 4007 uioc->done = megaraid_sysfs_get_ldmap_done; 4008 4009 /* 4010 * Prepare the mailbox packet to get the current logical drive mapping 4011 * table 4012 */ 4013 mbox->xferaddr = (uint32_t)raid_dev->sysfs_buffer_dma; 4014 4015 raw_mbox[0] = FC_DEL_LOGDRV; 4016 raw_mbox[2] = OP_GET_LDID_MAP; 4017 4018 /* 4019 * Setup a timer to recover from a non-responding controller 4020 */ 4021 timerp = &sysfs_timer; 4022 init_timer(timerp); 4023 4024 timerp->function = megaraid_sysfs_get_ldmap_timeout; 4025 timerp->data = (unsigned long)uioc; 4026 timerp->expires = jiffies + 60 * HZ; 4027 4028 add_timer(timerp); 4029 4030 /* 4031 * Send the command to the firmware 4032 */ 4033 rval = megaraid_mbox_mm_command(adapter, uioc); 4034 4035 if (rval == 0) { // command successfully issued 4036 wait_event(raid_dev->sysfs_wait_q, (uioc->status != -ENODATA)); 4037 4038 /* 4039 * Check if the command timed out 4040 */ 4041 if (uioc->status == -ETIME) { 4042 con_log(CL_ANN, (KERN_NOTICE 4043 "megaraid: sysfs get ld map timed out\n")); 4044 4045 rval = -ETIME; 4046 } 4047 else { 4048 rval = mbox->status; 4049 } 4050 4051 if (rval == 0) { 4052 memcpy(raid_dev->curr_ldmap, ldmap, 4053 sizeof(raid_dev->curr_ldmap)); 4054 } 4055 else { 4056 con_log(CL_ANN, (KERN_NOTICE 4057 "megaraid: get ld map failed with %x\n", rval)); 4058 } 4059 } 4060 else { 4061 con_log(CL_ANN, (KERN_NOTICE 4062 "megaraid: could not issue ldmap command:%x\n", rval)); 4063 } 4064 4065 4066 del_timer_sync(timerp); 4067 4068 mutex_unlock(&raid_dev->sysfs_mtx); 4069 4070 return rval; 4071 } 4072 4073 4074 /** 4075 * megaraid_sysfs_show_app_hndl - display application handle for this adapter 4076 * @cdev : class device object representation for the host 4077 * @buf : buffer to send data to 4078 * 4079 * Display the handle used by the applications while executing management 4080 * tasks on the adapter. We invoke a management module API to get the adapter 4081 * handle, since we do not interface with applications directly. 4082 */ 4083 static ssize_t 4084 megaraid_sysfs_show_app_hndl(struct device *dev, struct device_attribute *attr, 4085 char *buf) 4086 { 4087 struct Scsi_Host *shost = class_to_shost(dev); 4088 adapter_t *adapter = (adapter_t *)SCSIHOST2ADAP(shost); 4089 uint32_t app_hndl; 4090 4091 app_hndl = mraid_mm_adapter_app_handle(adapter->unique_id); 4092 4093 return snprintf(buf, 8, "%u\n", app_hndl); 4094 } 4095 4096 4097 /** 4098 * megaraid_sysfs_show_ldnum - display the logical drive number for this device 4099 * @dev : device object representation for the scsi device 4100 * @attr : device attribute to show 4101 * @buf : buffer to send data to 4102 * 4103 * Display the logical drive number for the device in question, if it a valid 4104 * logical drive. For physical devices, "-1" is returned. 4105 * 4106 * The logical drive number is displayed in following format: 4107 * 4108 * <SCSI ID> <LD NUM> <LD STICKY ID> <APP ADAPTER HANDLE> 4109 * 4110 * <int> <int> <int> <int> 4111 */ 4112 static ssize_t 4113 megaraid_sysfs_show_ldnum(struct device *dev, struct device_attribute *attr, char *buf) 4114 { 4115 struct scsi_device *sdev = to_scsi_device(dev); 4116 adapter_t *adapter = (adapter_t *)SCSIHOST2ADAP(sdev->host); 4117 mraid_device_t *raid_dev = ADAP2RAIDDEV(adapter); 4118 int scsi_id = -1; 4119 int logical_drv = -1; 4120 int ldid_map = -1; 4121 uint32_t app_hndl = 0; 4122 int mapped_sdev_id; 4123 int rval; 4124 int i; 4125 4126 if (raid_dev->random_del_supported && 4127 MRAID_IS_LOGICAL_SDEV(adapter, sdev)) { 4128 4129 rval = megaraid_sysfs_get_ldmap(adapter); 4130 if (rval == 0) { 4131 4132 for (i = 0; i < MAX_LOGICAL_DRIVES_40LD; i++) { 4133 4134 mapped_sdev_id = sdev->id; 4135 4136 if (sdev->id > adapter->init_id) { 4137 mapped_sdev_id -= 1; 4138 } 4139 4140 if (raid_dev->curr_ldmap[i] == mapped_sdev_id) { 4141 4142 scsi_id = sdev->id; 4143 4144 logical_drv = i; 4145 4146 ldid_map = raid_dev->curr_ldmap[i]; 4147 4148 app_hndl = mraid_mm_adapter_app_handle( 4149 adapter->unique_id); 4150 4151 break; 4152 } 4153 } 4154 } 4155 else { 4156 con_log(CL_ANN, (KERN_NOTICE 4157 "megaraid: sysfs get ld map failed: %x\n", 4158 rval)); 4159 } 4160 } 4161 4162 return snprintf(buf, 36, "%d %d %d %d\n", scsi_id, logical_drv, 4163 ldid_map, app_hndl); 4164 } 4165 4166 4167 /* 4168 * END: Mailbox Low Level Driver 4169 */ 4170 module_init(megaraid_init); 4171 module_exit(megaraid_exit); 4172 4173 /* vim: set ts=8 sw=8 tw=78 ai si: */ 4174