1 // SPDX-License-Identifier: GPL-2.0-or-later 2 /* 3 * 4 * Linux MegaRAID device driver 5 * 6 * Copyright (c) 2003-2004 LSI Logic Corporation. 7 * 8 * FILE : megaraid_mbox.c 9 * Version : v2.20.5.1 (Nov 16 2006) 10 * 11 * Authors: 12 * Atul Mukker <Atul.Mukker@lsi.com> 13 * Sreenivas Bagalkote <Sreenivas.Bagalkote@lsi.com> 14 * Manoj Jose <Manoj.Jose@lsi.com> 15 * Seokmann Ju 16 * 17 * List of supported controllers 18 * 19 * OEM Product Name VID DID SSVID SSID 20 * --- ------------ --- --- ---- ---- 21 * Dell PERC3/QC 101E 1960 1028 0471 22 * Dell PERC3/DC 101E 1960 1028 0493 23 * Dell PERC3/SC 101E 1960 1028 0475 24 * Dell PERC3/Di 1028 1960 1028 0123 25 * Dell PERC4/SC 1000 1960 1028 0520 26 * Dell PERC4/DC 1000 1960 1028 0518 27 * Dell PERC4/QC 1000 0407 1028 0531 28 * Dell PERC4/Di 1028 000F 1028 014A 29 * Dell PERC 4e/Si 1028 0013 1028 016c 30 * Dell PERC 4e/Di 1028 0013 1028 016d 31 * Dell PERC 4e/Di 1028 0013 1028 016e 32 * Dell PERC 4e/Di 1028 0013 1028 016f 33 * Dell PERC 4e/Di 1028 0013 1028 0170 34 * Dell PERC 4e/DC 1000 0408 1028 0002 35 * Dell PERC 4e/SC 1000 0408 1028 0001 36 * 37 * LSI MegaRAID SCSI 320-0 1000 1960 1000 A520 38 * LSI MegaRAID SCSI 320-1 1000 1960 1000 0520 39 * LSI MegaRAID SCSI 320-2 1000 1960 1000 0518 40 * LSI MegaRAID SCSI 320-0X 1000 0407 1000 0530 41 * LSI MegaRAID SCSI 320-2X 1000 0407 1000 0532 42 * LSI MegaRAID SCSI 320-4X 1000 0407 1000 0531 43 * LSI MegaRAID SCSI 320-1E 1000 0408 1000 0001 44 * LSI MegaRAID SCSI 320-2E 1000 0408 1000 0002 45 * LSI MegaRAID SATA 150-4 1000 1960 1000 4523 46 * LSI MegaRAID SATA 150-6 1000 1960 1000 0523 47 * LSI MegaRAID SATA 300-4X 1000 0409 1000 3004 48 * LSI MegaRAID SATA 300-8X 1000 0409 1000 3008 49 * 50 * INTEL RAID Controller SRCU42X 1000 0407 8086 0532 51 * INTEL RAID Controller SRCS16 1000 1960 8086 0523 52 * INTEL RAID Controller SRCU42E 1000 0408 8086 0002 53 * INTEL RAID Controller SRCZCRX 1000 0407 8086 0530 54 * INTEL RAID Controller SRCS28X 1000 0409 8086 3008 55 * INTEL RAID Controller SROMBU42E 1000 0408 8086 3431 56 * INTEL RAID Controller SROMBU42E 1000 0408 8086 3499 57 * INTEL RAID Controller SRCU51L 1000 1960 8086 0520 58 * 59 * FSC MegaRAID PCI Express ROMB 1000 0408 1734 1065 60 * 61 * ACER MegaRAID ROMB-2E 1000 0408 1025 004D 62 * 63 * NEC MegaRAID PCI Express ROMB 1000 0408 1033 8287 64 * 65 * For history of changes, see Documentation/scsi/ChangeLog.megaraid 66 */ 67 68 #include <linux/slab.h> 69 #include <linux/module.h> 70 #include "megaraid_mbox.h" 71 72 static int megaraid_init(void); 73 static void megaraid_exit(void); 74 75 static int megaraid_probe_one(struct pci_dev*, const struct pci_device_id *); 76 static void megaraid_detach_one(struct pci_dev *); 77 static void megaraid_mbox_shutdown(struct pci_dev *); 78 79 static int megaraid_io_attach(adapter_t *); 80 static void megaraid_io_detach(adapter_t *); 81 82 static int megaraid_init_mbox(adapter_t *); 83 static void megaraid_fini_mbox(adapter_t *); 84 85 static int megaraid_alloc_cmd_packets(adapter_t *); 86 static void megaraid_free_cmd_packets(adapter_t *); 87 88 static int megaraid_mbox_setup_dma_pools(adapter_t *); 89 static void megaraid_mbox_teardown_dma_pools(adapter_t *); 90 91 static int megaraid_sysfs_alloc_resources(adapter_t *); 92 static void megaraid_sysfs_free_resources(adapter_t *); 93 94 static int megaraid_abort_handler(struct scsi_cmnd *); 95 static int megaraid_reset_handler(struct scsi_cmnd *); 96 97 static int mbox_post_sync_cmd(adapter_t *, uint8_t []); 98 static int mbox_post_sync_cmd_fast(adapter_t *, uint8_t []); 99 static int megaraid_busywait_mbox(mraid_device_t *); 100 static int megaraid_mbox_product_info(adapter_t *); 101 static int megaraid_mbox_extended_cdb(adapter_t *); 102 static int megaraid_mbox_support_ha(adapter_t *, uint16_t *); 103 static int megaraid_mbox_support_random_del(adapter_t *); 104 static int megaraid_mbox_get_max_sg(adapter_t *); 105 static void megaraid_mbox_enum_raid_scsi(adapter_t *); 106 static void megaraid_mbox_flush_cache(adapter_t *); 107 static int megaraid_mbox_fire_sync_cmd(adapter_t *); 108 109 static void megaraid_mbox_display_scb(adapter_t *, scb_t *); 110 static void megaraid_mbox_setup_device_map(adapter_t *); 111 112 static int megaraid_queue_command(struct Scsi_Host *, struct scsi_cmnd *); 113 static scb_t *megaraid_mbox_build_cmd(adapter_t *, struct scsi_cmnd *, int *); 114 static void megaraid_mbox_runpendq(adapter_t *, scb_t *); 115 static void megaraid_mbox_prepare_pthru(adapter_t *, scb_t *, 116 struct scsi_cmnd *); 117 static void megaraid_mbox_prepare_epthru(adapter_t *, scb_t *, 118 struct scsi_cmnd *); 119 120 static irqreturn_t megaraid_isr(int, void *); 121 122 static void megaraid_mbox_dpc(unsigned long); 123 124 static ssize_t megaraid_mbox_app_hndl_show(struct device *, struct device_attribute *attr, char *); 125 static ssize_t megaraid_mbox_ld_show(struct device *, struct device_attribute *attr, char *); 126 127 static int megaraid_cmm_register(adapter_t *); 128 static int megaraid_cmm_unregister(adapter_t *); 129 static int megaraid_mbox_mm_handler(unsigned long, uioc_t *, uint32_t); 130 static int megaraid_mbox_mm_command(adapter_t *, uioc_t *); 131 static void megaraid_mbox_mm_done(adapter_t *, scb_t *); 132 static int gather_hbainfo(adapter_t *, mraid_hba_info_t *); 133 static int wait_till_fw_empty(adapter_t *); 134 135 136 137 MODULE_AUTHOR("megaraidlinux@lsi.com"); 138 MODULE_DESCRIPTION("LSI Logic MegaRAID Mailbox Driver"); 139 MODULE_LICENSE("GPL"); 140 MODULE_VERSION(MEGARAID_VERSION); 141 142 /* 143 * ### modules parameters for driver ### 144 */ 145 146 /* 147 * Set to enable driver to expose unconfigured disk to kernel 148 */ 149 static int megaraid_expose_unconf_disks = 0; 150 module_param_named(unconf_disks, megaraid_expose_unconf_disks, int, 0); 151 MODULE_PARM_DESC(unconf_disks, 152 "Set to expose unconfigured disks to kernel (default=0)"); 153 154 /* 155 * driver wait time if the adapter's mailbox is busy 156 */ 157 static unsigned int max_mbox_busy_wait = MBOX_BUSY_WAIT; 158 module_param_named(busy_wait, max_mbox_busy_wait, int, 0); 159 MODULE_PARM_DESC(busy_wait, 160 "Max wait for mailbox in microseconds if busy (default=10)"); 161 162 /* 163 * number of sectors per IO command 164 */ 165 static unsigned int megaraid_max_sectors = MBOX_MAX_SECTORS; 166 module_param_named(max_sectors, megaraid_max_sectors, int, 0); 167 MODULE_PARM_DESC(max_sectors, 168 "Maximum number of sectors per IO command (default=128)"); 169 170 /* 171 * number of commands per logical unit 172 */ 173 static unsigned int megaraid_cmd_per_lun = MBOX_DEF_CMD_PER_LUN; 174 module_param_named(cmd_per_lun, megaraid_cmd_per_lun, int, 0); 175 MODULE_PARM_DESC(cmd_per_lun, 176 "Maximum number of commands per logical unit (default=64)"); 177 178 179 /* 180 * Fast driver load option, skip scanning for physical devices during load. 181 * This would result in non-disk devices being skipped during driver load 182 * time. These can be later added though, using /proc/scsi/scsi 183 */ 184 static unsigned int megaraid_fast_load = 0; 185 module_param_named(fast_load, megaraid_fast_load, int, 0); 186 MODULE_PARM_DESC(fast_load, 187 "Faster loading of the driver, skips physical devices! (default=0)"); 188 189 190 /* 191 * mraid_debug level - threshold for amount of information to be displayed by 192 * the driver. This level can be changed through modules parameters, ioctl or 193 * sysfs/proc interface. By default, print the announcement messages only. 194 */ 195 int mraid_debug_level = CL_ANN; 196 module_param_named(debug_level, mraid_debug_level, int, 0); 197 MODULE_PARM_DESC(debug_level, "Debug level for driver (default=0)"); 198 199 /* 200 * PCI table for all supported controllers. 201 */ 202 static struct pci_device_id pci_id_table_g[] = { 203 { 204 PCI_VENDOR_ID_DELL, 205 PCI_DEVICE_ID_PERC4_DI_DISCOVERY, 206 PCI_VENDOR_ID_DELL, 207 PCI_SUBSYS_ID_PERC4_DI_DISCOVERY, 208 }, 209 { 210 PCI_VENDOR_ID_LSI_LOGIC, 211 PCI_DEVICE_ID_PERC4_SC, 212 PCI_VENDOR_ID_DELL, 213 PCI_SUBSYS_ID_PERC4_SC, 214 }, 215 { 216 PCI_VENDOR_ID_LSI_LOGIC, 217 PCI_DEVICE_ID_PERC4_DC, 218 PCI_VENDOR_ID_DELL, 219 PCI_SUBSYS_ID_PERC4_DC, 220 }, 221 { 222 PCI_VENDOR_ID_LSI_LOGIC, 223 PCI_DEVICE_ID_VERDE, 224 PCI_ANY_ID, 225 PCI_ANY_ID, 226 }, 227 { 228 PCI_VENDOR_ID_DELL, 229 PCI_DEVICE_ID_PERC4_DI_EVERGLADES, 230 PCI_VENDOR_ID_DELL, 231 PCI_SUBSYS_ID_PERC4_DI_EVERGLADES, 232 }, 233 { 234 PCI_VENDOR_ID_DELL, 235 PCI_DEVICE_ID_PERC4E_SI_BIGBEND, 236 PCI_VENDOR_ID_DELL, 237 PCI_SUBSYS_ID_PERC4E_SI_BIGBEND, 238 }, 239 { 240 PCI_VENDOR_ID_DELL, 241 PCI_DEVICE_ID_PERC4E_DI_KOBUK, 242 PCI_VENDOR_ID_DELL, 243 PCI_SUBSYS_ID_PERC4E_DI_KOBUK, 244 }, 245 { 246 PCI_VENDOR_ID_DELL, 247 PCI_DEVICE_ID_PERC4E_DI_CORVETTE, 248 PCI_VENDOR_ID_DELL, 249 PCI_SUBSYS_ID_PERC4E_DI_CORVETTE, 250 }, 251 { 252 PCI_VENDOR_ID_DELL, 253 PCI_DEVICE_ID_PERC4E_DI_EXPEDITION, 254 PCI_VENDOR_ID_DELL, 255 PCI_SUBSYS_ID_PERC4E_DI_EXPEDITION, 256 }, 257 { 258 PCI_VENDOR_ID_DELL, 259 PCI_DEVICE_ID_PERC4E_DI_GUADALUPE, 260 PCI_VENDOR_ID_DELL, 261 PCI_SUBSYS_ID_PERC4E_DI_GUADALUPE, 262 }, 263 { 264 PCI_VENDOR_ID_LSI_LOGIC, 265 PCI_DEVICE_ID_DOBSON, 266 PCI_ANY_ID, 267 PCI_ANY_ID, 268 }, 269 { 270 PCI_VENDOR_ID_AMI, 271 PCI_DEVICE_ID_AMI_MEGARAID3, 272 PCI_ANY_ID, 273 PCI_ANY_ID, 274 }, 275 { 276 PCI_VENDOR_ID_LSI_LOGIC, 277 PCI_DEVICE_ID_AMI_MEGARAID3, 278 PCI_ANY_ID, 279 PCI_ANY_ID, 280 }, 281 { 282 PCI_VENDOR_ID_LSI_LOGIC, 283 PCI_DEVICE_ID_LINDSAY, 284 PCI_ANY_ID, 285 PCI_ANY_ID, 286 }, 287 {0} /* Terminating entry */ 288 }; 289 MODULE_DEVICE_TABLE(pci, pci_id_table_g); 290 291 292 static struct pci_driver megaraid_pci_driver = { 293 .name = "megaraid", 294 .id_table = pci_id_table_g, 295 .probe = megaraid_probe_one, 296 .remove = megaraid_detach_one, 297 .shutdown = megaraid_mbox_shutdown, 298 }; 299 300 301 302 // definitions for the device attributes for exporting logical drive number 303 // for a scsi address (Host, Channel, Id, Lun) 304 305 static DEVICE_ATTR_ADMIN_RO(megaraid_mbox_app_hndl); 306 307 // Host template initializer for megaraid mbox sysfs device attributes 308 static struct device_attribute *megaraid_shost_attrs[] = { 309 &dev_attr_megaraid_mbox_app_hndl, 310 NULL, 311 }; 312 313 314 static DEVICE_ATTR_ADMIN_RO(megaraid_mbox_ld); 315 316 // Host template initializer for megaraid mbox sysfs device attributes 317 static struct device_attribute *megaraid_sdev_attrs[] = { 318 &dev_attr_megaraid_mbox_ld, 319 NULL, 320 }; 321 322 /* 323 * Scsi host template for megaraid unified driver 324 */ 325 static struct scsi_host_template megaraid_template_g = { 326 .module = THIS_MODULE, 327 .name = "LSI Logic MegaRAID driver", 328 .proc_name = "megaraid", 329 .queuecommand = megaraid_queue_command, 330 .eh_abort_handler = megaraid_abort_handler, 331 .eh_host_reset_handler = megaraid_reset_handler, 332 .change_queue_depth = scsi_change_queue_depth, 333 .no_write_same = 1, 334 .sdev_attrs = megaraid_sdev_attrs, 335 .shost_attrs = megaraid_shost_attrs, 336 }; 337 338 339 /** 340 * megaraid_init - module load hook 341 * 342 * We register ourselves as hotplug enabled module and let PCI subsystem 343 * discover our adapters. 344 */ 345 static int __init 346 megaraid_init(void) 347 { 348 int rval; 349 350 // Announce the driver version 351 con_log(CL_ANN, (KERN_INFO "megaraid: %s %s\n", MEGARAID_VERSION, 352 MEGARAID_EXT_VERSION)); 353 354 // check validity of module parameters 355 if (megaraid_cmd_per_lun > MBOX_MAX_SCSI_CMDS) { 356 357 con_log(CL_ANN, (KERN_WARNING 358 "megaraid mailbox: max commands per lun reset to %d\n", 359 MBOX_MAX_SCSI_CMDS)); 360 361 megaraid_cmd_per_lun = MBOX_MAX_SCSI_CMDS; 362 } 363 364 365 // register as a PCI hot-plug driver module 366 rval = pci_register_driver(&megaraid_pci_driver); 367 if (rval < 0) { 368 con_log(CL_ANN, (KERN_WARNING 369 "megaraid: could not register hotplug support.\n")); 370 } 371 372 return rval; 373 } 374 375 376 /** 377 * megaraid_exit - driver unload entry point 378 * 379 * We simply unwrap the megaraid_init routine here. 380 */ 381 static void __exit 382 megaraid_exit(void) 383 { 384 con_log(CL_DLEVEL1, (KERN_NOTICE "megaraid: unloading framework\n")); 385 386 // unregister as PCI hotplug driver 387 pci_unregister_driver(&megaraid_pci_driver); 388 389 return; 390 } 391 392 393 /** 394 * megaraid_probe_one - PCI hotplug entry point 395 * @pdev : handle to this controller's PCI configuration space 396 * @id : pci device id of the class of controllers 397 * 398 * This routine should be called whenever a new adapter is detected by the 399 * PCI hotplug susbsystem. 400 */ 401 static int 402 megaraid_probe_one(struct pci_dev *pdev, const struct pci_device_id *id) 403 { 404 adapter_t *adapter; 405 406 407 // detected a new controller 408 con_log(CL_ANN, (KERN_INFO 409 "megaraid: probe new device %#4.04x:%#4.04x:%#4.04x:%#4.04x: ", 410 pdev->vendor, pdev->device, pdev->subsystem_vendor, 411 pdev->subsystem_device)); 412 413 con_log(CL_ANN, ("bus %d:slot %d:func %d\n", pdev->bus->number, 414 PCI_SLOT(pdev->devfn), PCI_FUNC(pdev->devfn))); 415 416 if (pci_enable_device(pdev)) { 417 con_log(CL_ANN, (KERN_WARNING 418 "megaraid: pci_enable_device failed\n")); 419 420 return -ENODEV; 421 } 422 423 // Enable bus-mastering on this controller 424 pci_set_master(pdev); 425 426 // Allocate the per driver initialization structure 427 adapter = kzalloc(sizeof(adapter_t), GFP_KERNEL); 428 429 if (adapter == NULL) { 430 con_log(CL_ANN, (KERN_WARNING 431 "megaraid: out of memory, %s %d.\n", __func__, __LINE__)); 432 433 goto out_probe_one; 434 } 435 436 437 // set up PCI related soft state and other pre-known parameters 438 adapter->unique_id = pdev->bus->number << 8 | pdev->devfn; 439 adapter->irq = pdev->irq; 440 adapter->pdev = pdev; 441 442 atomic_set(&adapter->being_detached, 0); 443 444 // Setup the default DMA mask. This would be changed later on 445 // depending on hardware capabilities 446 if (dma_set_mask(&adapter->pdev->dev, DMA_BIT_MASK(32))) { 447 con_log(CL_ANN, (KERN_WARNING 448 "megaraid: dma_set_mask failed:%d\n", __LINE__)); 449 450 goto out_free_adapter; 451 } 452 453 454 // Initialize the synchronization lock for kernel and LLD 455 spin_lock_init(&adapter->lock); 456 457 // Initialize the command queues: the list of free SCBs and the list 458 // of pending SCBs. 459 INIT_LIST_HEAD(&adapter->kscb_pool); 460 spin_lock_init(SCSI_FREE_LIST_LOCK(adapter)); 461 462 INIT_LIST_HEAD(&adapter->pend_list); 463 spin_lock_init(PENDING_LIST_LOCK(adapter)); 464 465 INIT_LIST_HEAD(&adapter->completed_list); 466 spin_lock_init(COMPLETED_LIST_LOCK(adapter)); 467 468 469 // Start the mailbox based controller 470 if (megaraid_init_mbox(adapter) != 0) { 471 con_log(CL_ANN, (KERN_WARNING 472 "megaraid: mailbox adapter did not initialize\n")); 473 474 goto out_free_adapter; 475 } 476 477 // Register with LSI Common Management Module 478 if (megaraid_cmm_register(adapter) != 0) { 479 480 con_log(CL_ANN, (KERN_WARNING 481 "megaraid: could not register with management module\n")); 482 483 goto out_fini_mbox; 484 } 485 486 // setup adapter handle in PCI soft state 487 pci_set_drvdata(pdev, adapter); 488 489 // attach with scsi mid-layer 490 if (megaraid_io_attach(adapter) != 0) { 491 492 con_log(CL_ANN, (KERN_WARNING "megaraid: io attach failed\n")); 493 494 goto out_cmm_unreg; 495 } 496 497 return 0; 498 499 out_cmm_unreg: 500 megaraid_cmm_unregister(adapter); 501 out_fini_mbox: 502 megaraid_fini_mbox(adapter); 503 out_free_adapter: 504 kfree(adapter); 505 out_probe_one: 506 pci_disable_device(pdev); 507 508 return -ENODEV; 509 } 510 511 512 /** 513 * megaraid_detach_one - release framework resources and call LLD release routine 514 * @pdev : handle for our PCI configuration space 515 * 516 * This routine is called during driver unload. We free all the allocated 517 * resources and call the corresponding LLD so that it can also release all 518 * its resources. 519 * 520 * This routine is also called from the PCI hotplug system. 521 */ 522 static void 523 megaraid_detach_one(struct pci_dev *pdev) 524 { 525 adapter_t *adapter; 526 struct Scsi_Host *host; 527 528 529 // Start a rollback on this adapter 530 adapter = pci_get_drvdata(pdev); 531 532 if (!adapter) { 533 con_log(CL_ANN, (KERN_CRIT 534 "megaraid: Invalid detach on %#4.04x:%#4.04x:%#4.04x:%#4.04x\n", 535 pdev->vendor, pdev->device, pdev->subsystem_vendor, 536 pdev->subsystem_device)); 537 538 return; 539 } 540 else { 541 con_log(CL_ANN, (KERN_NOTICE 542 "megaraid: detaching device %#4.04x:%#4.04x:%#4.04x:%#4.04x\n", 543 pdev->vendor, pdev->device, pdev->subsystem_vendor, 544 pdev->subsystem_device)); 545 } 546 547 548 host = adapter->host; 549 550 // do not allow any more requests from the management module for this 551 // adapter. 552 // FIXME: How do we account for the request which might still be 553 // pending with us? 554 atomic_set(&adapter->being_detached, 1); 555 556 // detach from the IO sub-system 557 megaraid_io_detach(adapter); 558 559 // Unregister from common management module 560 // 561 // FIXME: this must return success or failure for conditions if there 562 // is a command pending with LLD or not. 563 megaraid_cmm_unregister(adapter); 564 565 // finalize the mailbox based controller and release all resources 566 megaraid_fini_mbox(adapter); 567 568 kfree(adapter); 569 570 scsi_host_put(host); 571 572 pci_disable_device(pdev); 573 574 return; 575 } 576 577 578 /** 579 * megaraid_mbox_shutdown - PCI shutdown for megaraid HBA 580 * @pdev : generic driver model device 581 * 582 * Shutdown notification, perform flush cache. 583 */ 584 static void 585 megaraid_mbox_shutdown(struct pci_dev *pdev) 586 { 587 adapter_t *adapter = pci_get_drvdata(pdev); 588 static int counter; 589 590 if (!adapter) { 591 con_log(CL_ANN, (KERN_WARNING 592 "megaraid: null device in shutdown\n")); 593 return; 594 } 595 596 // flush caches now 597 con_log(CL_ANN, (KERN_INFO "megaraid: flushing adapter %d...", 598 counter++)); 599 600 megaraid_mbox_flush_cache(adapter); 601 602 con_log(CL_ANN, ("done\n")); 603 } 604 605 606 /** 607 * megaraid_io_attach - attach a device with the IO subsystem 608 * @adapter : controller's soft state 609 * 610 * Attach this device with the IO subsystem. 611 */ 612 static int 613 megaraid_io_attach(adapter_t *adapter) 614 { 615 struct Scsi_Host *host; 616 617 // Initialize SCSI Host structure 618 host = scsi_host_alloc(&megaraid_template_g, 8); 619 if (!host) { 620 con_log(CL_ANN, (KERN_WARNING 621 "megaraid mbox: scsi_register failed\n")); 622 623 return -1; 624 } 625 626 SCSIHOST2ADAP(host) = (caddr_t)adapter; 627 adapter->host = host; 628 629 host->irq = adapter->irq; 630 host->unique_id = adapter->unique_id; 631 host->can_queue = adapter->max_cmds; 632 host->this_id = adapter->init_id; 633 host->sg_tablesize = adapter->sglen; 634 host->max_sectors = adapter->max_sectors; 635 host->cmd_per_lun = adapter->cmd_per_lun; 636 host->max_channel = adapter->max_channel; 637 host->max_id = adapter->max_target; 638 host->max_lun = adapter->max_lun; 639 640 641 // notify mid-layer about the new controller 642 if (scsi_add_host(host, &adapter->pdev->dev)) { 643 644 con_log(CL_ANN, (KERN_WARNING 645 "megaraid mbox: scsi_add_host failed\n")); 646 647 scsi_host_put(host); 648 649 return -1; 650 } 651 652 scsi_scan_host(host); 653 654 return 0; 655 } 656 657 658 /** 659 * megaraid_io_detach - detach a device from the IO subsystem 660 * @adapter : controller's soft state 661 * 662 * Detach this device from the IO subsystem. 663 */ 664 static void 665 megaraid_io_detach(adapter_t *adapter) 666 { 667 struct Scsi_Host *host; 668 669 con_log(CL_DLEVEL1, (KERN_INFO "megaraid: io detach\n")); 670 671 host = adapter->host; 672 673 scsi_remove_host(host); 674 675 return; 676 } 677 678 679 /* 680 * START: Mailbox Low Level Driver 681 * 682 * This is section specific to the single mailbox based controllers 683 */ 684 685 /** 686 * megaraid_init_mbox - initialize controller 687 * @adapter : our soft state 688 * 689 * - Allocate 16-byte aligned mailbox memory for firmware handshake 690 * - Allocate controller's memory resources 691 * - Find out all initialization data 692 * - Allocate memory required for all the commands 693 * - Use internal library of FW routines, build up complete soft state 694 */ 695 static int 696 megaraid_init_mbox(adapter_t *adapter) 697 { 698 struct pci_dev *pdev; 699 mraid_device_t *raid_dev; 700 int i; 701 uint32_t magic64; 702 703 704 adapter->ito = MBOX_TIMEOUT; 705 pdev = adapter->pdev; 706 707 /* 708 * Allocate and initialize the init data structure for mailbox 709 * controllers 710 */ 711 raid_dev = kzalloc(sizeof(mraid_device_t), GFP_KERNEL); 712 if (raid_dev == NULL) return -1; 713 714 715 /* 716 * Attach the adapter soft state to raid device soft state 717 */ 718 adapter->raid_device = (caddr_t)raid_dev; 719 raid_dev->fast_load = megaraid_fast_load; 720 721 722 // our baseport 723 raid_dev->baseport = pci_resource_start(pdev, 0); 724 725 if (pci_request_regions(pdev, "MegaRAID: LSI Logic Corporation") != 0) { 726 727 con_log(CL_ANN, (KERN_WARNING 728 "megaraid: mem region busy\n")); 729 730 goto out_free_raid_dev; 731 } 732 733 raid_dev->baseaddr = ioremap(raid_dev->baseport, 128); 734 735 if (!raid_dev->baseaddr) { 736 737 con_log(CL_ANN, (KERN_WARNING 738 "megaraid: could not map hba memory\n") ); 739 740 goto out_release_regions; 741 } 742 743 /* initialize the mutual exclusion lock for the mailbox */ 744 spin_lock_init(&raid_dev->mailbox_lock); 745 746 /* allocate memory required for commands */ 747 if (megaraid_alloc_cmd_packets(adapter) != 0) 748 goto out_iounmap; 749 750 /* 751 * Issue SYNC cmd to flush the pending cmds in the adapter 752 * and initialize its internal state 753 */ 754 755 if (megaraid_mbox_fire_sync_cmd(adapter)) 756 con_log(CL_ANN, ("megaraid: sync cmd failed\n")); 757 758 /* 759 * Setup the rest of the soft state using the library of 760 * FW routines 761 */ 762 763 /* request IRQ and register the interrupt service routine */ 764 if (request_irq(adapter->irq, megaraid_isr, IRQF_SHARED, "megaraid", 765 adapter)) { 766 767 con_log(CL_ANN, (KERN_WARNING 768 "megaraid: Couldn't register IRQ %d!\n", adapter->irq)); 769 goto out_alloc_cmds; 770 771 } 772 773 // Product info 774 if (megaraid_mbox_product_info(adapter) != 0) 775 goto out_free_irq; 776 777 // Do we support extended CDBs 778 adapter->max_cdb_sz = 10; 779 if (megaraid_mbox_extended_cdb(adapter) == 0) { 780 adapter->max_cdb_sz = 16; 781 } 782 783 /* 784 * Do we support cluster environment, if we do, what is the initiator 785 * id. 786 * NOTE: In a non-cluster aware firmware environment, the LLD should 787 * return 7 as initiator id. 788 */ 789 adapter->ha = 0; 790 adapter->init_id = -1; 791 if (megaraid_mbox_support_ha(adapter, &adapter->init_id) == 0) { 792 adapter->ha = 1; 793 } 794 795 /* 796 * Prepare the device ids array to have the mapping between the kernel 797 * device address and megaraid device address. 798 * We export the physical devices on their actual addresses. The 799 * logical drives are exported on a virtual SCSI channel 800 */ 801 megaraid_mbox_setup_device_map(adapter); 802 803 // If the firmware supports random deletion, update the device id map 804 if (megaraid_mbox_support_random_del(adapter)) { 805 806 // Change the logical drives numbers in device_ids array one 807 // slot in device_ids is reserved for target id, that's why 808 // "<=" below 809 for (i = 0; i <= MAX_LOGICAL_DRIVES_40LD; i++) { 810 adapter->device_ids[adapter->max_channel][i] += 0x80; 811 } 812 adapter->device_ids[adapter->max_channel][adapter->init_id] = 813 0xFF; 814 815 raid_dev->random_del_supported = 1; 816 } 817 818 /* 819 * find out the maximum number of scatter-gather elements supported by 820 * this firmware 821 */ 822 adapter->sglen = megaraid_mbox_get_max_sg(adapter); 823 824 // enumerate RAID and SCSI channels so that all devices on SCSI 825 // channels can later be exported, including disk devices 826 megaraid_mbox_enum_raid_scsi(adapter); 827 828 /* 829 * Other parameters required by upper layer 830 * 831 * maximum number of sectors per IO command 832 */ 833 adapter->max_sectors = megaraid_max_sectors; 834 835 /* 836 * number of queued commands per LUN. 837 */ 838 adapter->cmd_per_lun = megaraid_cmd_per_lun; 839 840 /* 841 * Allocate resources required to issue FW calls, when sysfs is 842 * accessed 843 */ 844 if (megaraid_sysfs_alloc_resources(adapter) != 0) 845 goto out_free_irq; 846 847 // Set the DMA mask to 64-bit. All supported controllers as capable of 848 // DMA in this range 849 pci_read_config_dword(adapter->pdev, PCI_CONF_AMISIG64, &magic64); 850 851 if (((magic64 == HBA_SIGNATURE_64_BIT) && 852 ((adapter->pdev->subsystem_device != 853 PCI_SUBSYS_ID_MEGARAID_SATA_150_6) && 854 (adapter->pdev->subsystem_device != 855 PCI_SUBSYS_ID_MEGARAID_SATA_150_4))) || 856 (adapter->pdev->vendor == PCI_VENDOR_ID_LSI_LOGIC && 857 adapter->pdev->device == PCI_DEVICE_ID_VERDE) || 858 (adapter->pdev->vendor == PCI_VENDOR_ID_LSI_LOGIC && 859 adapter->pdev->device == PCI_DEVICE_ID_DOBSON) || 860 (adapter->pdev->vendor == PCI_VENDOR_ID_LSI_LOGIC && 861 adapter->pdev->device == PCI_DEVICE_ID_LINDSAY) || 862 (adapter->pdev->vendor == PCI_VENDOR_ID_DELL && 863 adapter->pdev->device == PCI_DEVICE_ID_PERC4_DI_EVERGLADES) || 864 (adapter->pdev->vendor == PCI_VENDOR_ID_DELL && 865 adapter->pdev->device == PCI_DEVICE_ID_PERC4E_DI_KOBUK)) { 866 if (dma_set_mask(&adapter->pdev->dev, DMA_BIT_MASK(64))) { 867 con_log(CL_ANN, (KERN_WARNING 868 "megaraid: DMA mask for 64-bit failed\n")); 869 870 if (dma_set_mask(&adapter->pdev->dev, 871 DMA_BIT_MASK(32))) { 872 con_log(CL_ANN, (KERN_WARNING 873 "megaraid: 32-bit DMA mask failed\n")); 874 goto out_free_sysfs_res; 875 } 876 } 877 } 878 879 // setup tasklet for DPC 880 tasklet_init(&adapter->dpc_h, megaraid_mbox_dpc, 881 (unsigned long)adapter); 882 883 con_log(CL_DLEVEL1, (KERN_INFO 884 "megaraid mbox hba successfully initialized\n")); 885 886 return 0; 887 888 out_free_sysfs_res: 889 megaraid_sysfs_free_resources(adapter); 890 out_free_irq: 891 free_irq(adapter->irq, adapter); 892 out_alloc_cmds: 893 megaraid_free_cmd_packets(adapter); 894 out_iounmap: 895 iounmap(raid_dev->baseaddr); 896 out_release_regions: 897 pci_release_regions(pdev); 898 out_free_raid_dev: 899 kfree(raid_dev); 900 901 return -1; 902 } 903 904 905 /** 906 * megaraid_fini_mbox - undo controller initialization 907 * @adapter : our soft state 908 */ 909 static void 910 megaraid_fini_mbox(adapter_t *adapter) 911 { 912 mraid_device_t *raid_dev = ADAP2RAIDDEV(adapter); 913 914 // flush all caches 915 megaraid_mbox_flush_cache(adapter); 916 917 tasklet_kill(&adapter->dpc_h); 918 919 megaraid_sysfs_free_resources(adapter); 920 921 megaraid_free_cmd_packets(adapter); 922 923 free_irq(adapter->irq, adapter); 924 925 iounmap(raid_dev->baseaddr); 926 927 pci_release_regions(adapter->pdev); 928 929 kfree(raid_dev); 930 931 return; 932 } 933 934 935 /** 936 * megaraid_alloc_cmd_packets - allocate shared mailbox 937 * @adapter : soft state of the raid controller 938 * 939 * Allocate and align the shared mailbox. This mailbox is used to issue 940 * all the commands. For IO based controllers, the mailbox is also registered 941 * with the FW. Allocate memory for all commands as well. 942 * This is our big allocator. 943 */ 944 static int 945 megaraid_alloc_cmd_packets(adapter_t *adapter) 946 { 947 mraid_device_t *raid_dev = ADAP2RAIDDEV(adapter); 948 struct pci_dev *pdev; 949 unsigned long align; 950 scb_t *scb; 951 mbox_ccb_t *ccb; 952 struct mraid_pci_blk *epthru_pci_blk; 953 struct mraid_pci_blk *sg_pci_blk; 954 struct mraid_pci_blk *mbox_pci_blk; 955 int i; 956 957 pdev = adapter->pdev; 958 959 /* 960 * Setup the mailbox 961 * Allocate the common 16-byte aligned memory for the handshake 962 * mailbox. 963 */ 964 raid_dev->una_mbox64 = dma_alloc_coherent(&adapter->pdev->dev, 965 sizeof(mbox64_t), 966 &raid_dev->una_mbox64_dma, 967 GFP_KERNEL); 968 969 if (!raid_dev->una_mbox64) { 970 con_log(CL_ANN, (KERN_WARNING 971 "megaraid: out of memory, %s %d\n", __func__, 972 __LINE__)); 973 return -1; 974 } 975 976 /* 977 * Align the mailbox at 16-byte boundary 978 */ 979 raid_dev->mbox = &raid_dev->una_mbox64->mbox32; 980 981 raid_dev->mbox = (mbox_t *)((((unsigned long)raid_dev->mbox) + 15) & 982 (~0UL ^ 0xFUL)); 983 984 raid_dev->mbox64 = (mbox64_t *)(((unsigned long)raid_dev->mbox) - 8); 985 986 align = ((void *)raid_dev->mbox - 987 ((void *)&raid_dev->una_mbox64->mbox32)); 988 989 raid_dev->mbox_dma = (unsigned long)raid_dev->una_mbox64_dma + 8 + 990 align; 991 992 // Allocate memory for commands issued internally 993 adapter->ibuf = dma_alloc_coherent(&pdev->dev, MBOX_IBUF_SIZE, 994 &adapter->ibuf_dma_h, GFP_KERNEL); 995 if (!adapter->ibuf) { 996 997 con_log(CL_ANN, (KERN_WARNING 998 "megaraid: out of memory, %s %d\n", __func__, 999 __LINE__)); 1000 1001 goto out_free_common_mbox; 1002 } 1003 1004 // Allocate memory for our SCSI Command Blocks and their associated 1005 // memory 1006 1007 /* 1008 * Allocate memory for the base list of scb. Later allocate memory for 1009 * CCBs and embedded components of each CCB and point the pointers in 1010 * scb to the allocated components 1011 * NOTE: The code to allocate SCB will be duplicated in all the LLD 1012 * since the calling routine does not yet know the number of available 1013 * commands. 1014 */ 1015 adapter->kscb_list = kcalloc(MBOX_MAX_SCSI_CMDS, sizeof(scb_t), GFP_KERNEL); 1016 1017 if (adapter->kscb_list == NULL) { 1018 con_log(CL_ANN, (KERN_WARNING 1019 "megaraid: out of memory, %s %d\n", __func__, 1020 __LINE__)); 1021 goto out_free_ibuf; 1022 } 1023 1024 // memory allocation for our command packets 1025 if (megaraid_mbox_setup_dma_pools(adapter) != 0) { 1026 con_log(CL_ANN, (KERN_WARNING 1027 "megaraid: out of memory, %s %d\n", __func__, 1028 __LINE__)); 1029 goto out_free_scb_list; 1030 } 1031 1032 // Adjust the scb pointers and link in the free pool 1033 epthru_pci_blk = raid_dev->epthru_pool; 1034 sg_pci_blk = raid_dev->sg_pool; 1035 mbox_pci_blk = raid_dev->mbox_pool; 1036 1037 for (i = 0; i < MBOX_MAX_SCSI_CMDS; i++) { 1038 scb = adapter->kscb_list + i; 1039 ccb = raid_dev->ccb_list + i; 1040 1041 ccb->mbox = (mbox_t *)(mbox_pci_blk[i].vaddr + 16); 1042 ccb->raw_mbox = (uint8_t *)ccb->mbox; 1043 ccb->mbox64 = (mbox64_t *)(mbox_pci_blk[i].vaddr + 8); 1044 ccb->mbox_dma_h = (unsigned long)mbox_pci_blk[i].dma_addr + 16; 1045 1046 // make sure the mailbox is aligned properly 1047 if (ccb->mbox_dma_h & 0x0F) { 1048 con_log(CL_ANN, (KERN_CRIT 1049 "megaraid mbox: not aligned on 16-bytes\n")); 1050 1051 goto out_teardown_dma_pools; 1052 } 1053 1054 ccb->epthru = (mraid_epassthru_t *) 1055 epthru_pci_blk[i].vaddr; 1056 ccb->epthru_dma_h = epthru_pci_blk[i].dma_addr; 1057 ccb->pthru = (mraid_passthru_t *)ccb->epthru; 1058 ccb->pthru_dma_h = ccb->epthru_dma_h; 1059 1060 1061 ccb->sgl64 = (mbox_sgl64 *)sg_pci_blk[i].vaddr; 1062 ccb->sgl_dma_h = sg_pci_blk[i].dma_addr; 1063 ccb->sgl32 = (mbox_sgl32 *)ccb->sgl64; 1064 1065 scb->ccb = (caddr_t)ccb; 1066 scb->gp = 0; 1067 1068 scb->sno = i; // command index 1069 1070 scb->scp = NULL; 1071 scb->state = SCB_FREE; 1072 scb->dma_direction = DMA_NONE; 1073 scb->dma_type = MRAID_DMA_NONE; 1074 scb->dev_channel = -1; 1075 scb->dev_target = -1; 1076 1077 // put scb in the free pool 1078 list_add_tail(&scb->list, &adapter->kscb_pool); 1079 } 1080 1081 return 0; 1082 1083 out_teardown_dma_pools: 1084 megaraid_mbox_teardown_dma_pools(adapter); 1085 out_free_scb_list: 1086 kfree(adapter->kscb_list); 1087 out_free_ibuf: 1088 dma_free_coherent(&pdev->dev, MBOX_IBUF_SIZE, (void *)adapter->ibuf, 1089 adapter->ibuf_dma_h); 1090 out_free_common_mbox: 1091 dma_free_coherent(&adapter->pdev->dev, sizeof(mbox64_t), 1092 (caddr_t)raid_dev->una_mbox64, raid_dev->una_mbox64_dma); 1093 1094 return -1; 1095 } 1096 1097 1098 /** 1099 * megaraid_free_cmd_packets - free memory 1100 * @adapter : soft state of the raid controller 1101 * 1102 * Release memory resources allocated for commands. 1103 */ 1104 static void 1105 megaraid_free_cmd_packets(adapter_t *adapter) 1106 { 1107 mraid_device_t *raid_dev = ADAP2RAIDDEV(adapter); 1108 1109 megaraid_mbox_teardown_dma_pools(adapter); 1110 1111 kfree(adapter->kscb_list); 1112 1113 dma_free_coherent(&adapter->pdev->dev, MBOX_IBUF_SIZE, 1114 (void *)adapter->ibuf, adapter->ibuf_dma_h); 1115 1116 dma_free_coherent(&adapter->pdev->dev, sizeof(mbox64_t), 1117 (caddr_t)raid_dev->una_mbox64, raid_dev->una_mbox64_dma); 1118 return; 1119 } 1120 1121 1122 /** 1123 * megaraid_mbox_setup_dma_pools - setup dma pool for command packets 1124 * @adapter : HBA soft state 1125 * 1126 * Setup the dma pools for mailbox, passthru and extended passthru structures, 1127 * and scatter-gather lists. 1128 */ 1129 static int 1130 megaraid_mbox_setup_dma_pools(adapter_t *adapter) 1131 { 1132 mraid_device_t *raid_dev = ADAP2RAIDDEV(adapter); 1133 struct mraid_pci_blk *epthru_pci_blk; 1134 struct mraid_pci_blk *sg_pci_blk; 1135 struct mraid_pci_blk *mbox_pci_blk; 1136 int i; 1137 1138 1139 1140 // Allocate memory for 16-bytes aligned mailboxes 1141 raid_dev->mbox_pool_handle = dma_pool_create("megaraid mbox pool", 1142 &adapter->pdev->dev, 1143 sizeof(mbox64_t) + 16, 1144 16, 0); 1145 1146 if (raid_dev->mbox_pool_handle == NULL) { 1147 goto fail_setup_dma_pool; 1148 } 1149 1150 mbox_pci_blk = raid_dev->mbox_pool; 1151 for (i = 0; i < MBOX_MAX_SCSI_CMDS; i++) { 1152 mbox_pci_blk[i].vaddr = dma_pool_alloc( 1153 raid_dev->mbox_pool_handle, 1154 GFP_KERNEL, 1155 &mbox_pci_blk[i].dma_addr); 1156 if (!mbox_pci_blk[i].vaddr) { 1157 goto fail_setup_dma_pool; 1158 } 1159 } 1160 1161 /* 1162 * Allocate memory for each embedded passthru strucuture pointer 1163 * Request for a 128 bytes aligned structure for each passthru command 1164 * structure 1165 * Since passthru and extended passthru commands are exclusive, they 1166 * share common memory pool. Passthru structures piggyback on memory 1167 * allocated to extended passthru since passthru is smaller of the two 1168 */ 1169 raid_dev->epthru_pool_handle = dma_pool_create("megaraid mbox pthru", 1170 &adapter->pdev->dev, sizeof(mraid_epassthru_t), 128, 0); 1171 1172 if (raid_dev->epthru_pool_handle == NULL) { 1173 goto fail_setup_dma_pool; 1174 } 1175 1176 epthru_pci_blk = raid_dev->epthru_pool; 1177 for (i = 0; i < MBOX_MAX_SCSI_CMDS; i++) { 1178 epthru_pci_blk[i].vaddr = dma_pool_alloc( 1179 raid_dev->epthru_pool_handle, 1180 GFP_KERNEL, 1181 &epthru_pci_blk[i].dma_addr); 1182 if (!epthru_pci_blk[i].vaddr) { 1183 goto fail_setup_dma_pool; 1184 } 1185 } 1186 1187 1188 // Allocate memory for each scatter-gather list. Request for 512 bytes 1189 // alignment for each sg list 1190 raid_dev->sg_pool_handle = dma_pool_create("megaraid mbox sg", 1191 &adapter->pdev->dev, 1192 sizeof(mbox_sgl64) * MBOX_MAX_SG_SIZE, 1193 512, 0); 1194 1195 if (raid_dev->sg_pool_handle == NULL) { 1196 goto fail_setup_dma_pool; 1197 } 1198 1199 sg_pci_blk = raid_dev->sg_pool; 1200 for (i = 0; i < MBOX_MAX_SCSI_CMDS; i++) { 1201 sg_pci_blk[i].vaddr = dma_pool_alloc( 1202 raid_dev->sg_pool_handle, 1203 GFP_KERNEL, 1204 &sg_pci_blk[i].dma_addr); 1205 if (!sg_pci_blk[i].vaddr) { 1206 goto fail_setup_dma_pool; 1207 } 1208 } 1209 1210 return 0; 1211 1212 fail_setup_dma_pool: 1213 megaraid_mbox_teardown_dma_pools(adapter); 1214 return -1; 1215 } 1216 1217 1218 /** 1219 * megaraid_mbox_teardown_dma_pools - teardown dma pools for command packets 1220 * @adapter : HBA soft state 1221 * 1222 * Teardown the dma pool for mailbox, passthru and extended passthru 1223 * structures, and scatter-gather lists. 1224 */ 1225 static void 1226 megaraid_mbox_teardown_dma_pools(adapter_t *adapter) 1227 { 1228 mraid_device_t *raid_dev = ADAP2RAIDDEV(adapter); 1229 struct mraid_pci_blk *epthru_pci_blk; 1230 struct mraid_pci_blk *sg_pci_blk; 1231 struct mraid_pci_blk *mbox_pci_blk; 1232 int i; 1233 1234 1235 sg_pci_blk = raid_dev->sg_pool; 1236 for (i = 0; i < MBOX_MAX_SCSI_CMDS && sg_pci_blk[i].vaddr; i++) { 1237 dma_pool_free(raid_dev->sg_pool_handle, sg_pci_blk[i].vaddr, 1238 sg_pci_blk[i].dma_addr); 1239 } 1240 dma_pool_destroy(raid_dev->sg_pool_handle); 1241 1242 1243 epthru_pci_blk = raid_dev->epthru_pool; 1244 for (i = 0; i < MBOX_MAX_SCSI_CMDS && epthru_pci_blk[i].vaddr; i++) { 1245 dma_pool_free(raid_dev->epthru_pool_handle, 1246 epthru_pci_blk[i].vaddr, epthru_pci_blk[i].dma_addr); 1247 } 1248 dma_pool_destroy(raid_dev->epthru_pool_handle); 1249 1250 1251 mbox_pci_blk = raid_dev->mbox_pool; 1252 for (i = 0; i < MBOX_MAX_SCSI_CMDS && mbox_pci_blk[i].vaddr; i++) { 1253 dma_pool_free(raid_dev->mbox_pool_handle, 1254 mbox_pci_blk[i].vaddr, mbox_pci_blk[i].dma_addr); 1255 } 1256 dma_pool_destroy(raid_dev->mbox_pool_handle); 1257 1258 return; 1259 } 1260 1261 1262 /** 1263 * megaraid_alloc_scb - detach and return a scb from the free list 1264 * @adapter : controller's soft state 1265 * @scp : pointer to the scsi command to be executed 1266 * 1267 * Return the scb from the head of the free list. %NULL if there are none 1268 * available. 1269 */ 1270 static scb_t * 1271 megaraid_alloc_scb(adapter_t *adapter, struct scsi_cmnd *scp) 1272 { 1273 struct list_head *head = &adapter->kscb_pool; 1274 scb_t *scb = NULL; 1275 unsigned long flags; 1276 1277 // detach scb from free pool 1278 spin_lock_irqsave(SCSI_FREE_LIST_LOCK(adapter), flags); 1279 1280 if (list_empty(head)) { 1281 spin_unlock_irqrestore(SCSI_FREE_LIST_LOCK(adapter), flags); 1282 return NULL; 1283 } 1284 1285 scb = list_entry(head->next, scb_t, list); 1286 list_del_init(&scb->list); 1287 1288 spin_unlock_irqrestore(SCSI_FREE_LIST_LOCK(adapter), flags); 1289 1290 scb->state = SCB_ACTIVE; 1291 scb->scp = scp; 1292 scb->dma_type = MRAID_DMA_NONE; 1293 1294 return scb; 1295 } 1296 1297 1298 /** 1299 * megaraid_dealloc_scb - return the scb to the free pool 1300 * @adapter : controller's soft state 1301 * @scb : scb to be freed 1302 * 1303 * Return the scb back to the free list of scbs. The caller must 'flush' the 1304 * SCB before calling us. E.g., performing pci_unamp and/or pci_sync etc. 1305 * NOTE NOTE: Make sure the scb is not on any list before calling this 1306 * routine. 1307 */ 1308 static inline void 1309 megaraid_dealloc_scb(adapter_t *adapter, scb_t *scb) 1310 { 1311 unsigned long flags; 1312 1313 // put scb in the free pool 1314 scb->state = SCB_FREE; 1315 scb->scp = NULL; 1316 spin_lock_irqsave(SCSI_FREE_LIST_LOCK(adapter), flags); 1317 1318 list_add(&scb->list, &adapter->kscb_pool); 1319 1320 spin_unlock_irqrestore(SCSI_FREE_LIST_LOCK(adapter), flags); 1321 1322 return; 1323 } 1324 1325 1326 /** 1327 * megaraid_mbox_mksgl - make the scatter-gather list 1328 * @adapter : controller's soft state 1329 * @scb : scsi control block 1330 * 1331 * Prepare the scatter-gather list. 1332 */ 1333 static int 1334 megaraid_mbox_mksgl(adapter_t *adapter, scb_t *scb) 1335 { 1336 struct scatterlist *sgl; 1337 mbox_ccb_t *ccb; 1338 struct scsi_cmnd *scp; 1339 int sgcnt; 1340 int i; 1341 1342 1343 scp = scb->scp; 1344 ccb = (mbox_ccb_t *)scb->ccb; 1345 1346 sgcnt = scsi_dma_map(scp); 1347 BUG_ON(sgcnt < 0 || sgcnt > adapter->sglen); 1348 1349 // no mapping required if no data to be transferred 1350 if (!sgcnt) 1351 return 0; 1352 1353 scb->dma_type = MRAID_DMA_WSG; 1354 1355 scsi_for_each_sg(scp, sgl, sgcnt, i) { 1356 ccb->sgl64[i].address = sg_dma_address(sgl); 1357 ccb->sgl64[i].length = sg_dma_len(sgl); 1358 } 1359 1360 // Return count of SG nodes 1361 return sgcnt; 1362 } 1363 1364 1365 /** 1366 * mbox_post_cmd - issue a mailbox command 1367 * @adapter : controller's soft state 1368 * @scb : command to be issued 1369 * 1370 * Post the command to the controller if mailbox is available. 1371 */ 1372 static int 1373 mbox_post_cmd(adapter_t *adapter, scb_t *scb) 1374 { 1375 mraid_device_t *raid_dev = ADAP2RAIDDEV(adapter); 1376 mbox64_t *mbox64; 1377 mbox_t *mbox; 1378 mbox_ccb_t *ccb; 1379 unsigned long flags; 1380 unsigned int i = 0; 1381 1382 1383 ccb = (mbox_ccb_t *)scb->ccb; 1384 mbox = raid_dev->mbox; 1385 mbox64 = raid_dev->mbox64; 1386 1387 /* 1388 * Check for busy mailbox. If it is, return failure - the caller 1389 * should retry later. 1390 */ 1391 spin_lock_irqsave(MAILBOX_LOCK(raid_dev), flags); 1392 1393 if (unlikely(mbox->busy)) { 1394 do { 1395 udelay(1); 1396 i++; 1397 rmb(); 1398 } while(mbox->busy && (i < max_mbox_busy_wait)); 1399 1400 if (mbox->busy) { 1401 1402 spin_unlock_irqrestore(MAILBOX_LOCK(raid_dev), flags); 1403 1404 return -1; 1405 } 1406 } 1407 1408 1409 // Copy this command's mailbox data into "adapter's" mailbox 1410 memcpy((caddr_t)mbox64, (caddr_t)ccb->mbox64, 22); 1411 mbox->cmdid = scb->sno; 1412 1413 adapter->outstanding_cmds++; 1414 1415 mbox->busy = 1; // Set busy 1416 mbox->poll = 0; 1417 mbox->ack = 0; 1418 wmb(); 1419 1420 WRINDOOR(raid_dev, raid_dev->mbox_dma | 0x1); 1421 1422 spin_unlock_irqrestore(MAILBOX_LOCK(raid_dev), flags); 1423 1424 return 0; 1425 } 1426 1427 1428 /** 1429 * megaraid_queue_command_lck - generic queue entry point for all LLDs 1430 * @scp : pointer to the scsi command to be executed 1431 * @done : callback routine to be called after the cmd has be completed 1432 * 1433 * Queue entry point for mailbox based controllers. 1434 */ 1435 static int 1436 megaraid_queue_command_lck(struct scsi_cmnd *scp, void (*done)(struct scsi_cmnd *)) 1437 { 1438 adapter_t *adapter; 1439 scb_t *scb; 1440 int if_busy; 1441 1442 adapter = SCP2ADAPTER(scp); 1443 scp->scsi_done = done; 1444 scp->result = 0; 1445 1446 /* 1447 * Allocate and build a SCB request 1448 * if_busy flag will be set if megaraid_mbox_build_cmd() command could 1449 * not allocate scb. We will return non-zero status in that case. 1450 * NOTE: scb can be null even though certain commands completed 1451 * successfully, e.g., MODE_SENSE and TEST_UNIT_READY, it would 1452 * return 0 in that case, and we would do the callback right away. 1453 */ 1454 if_busy = 0; 1455 scb = megaraid_mbox_build_cmd(adapter, scp, &if_busy); 1456 if (!scb) { // command already completed 1457 done(scp); 1458 return 0; 1459 } 1460 1461 megaraid_mbox_runpendq(adapter, scb); 1462 return if_busy; 1463 } 1464 1465 static DEF_SCSI_QCMD(megaraid_queue_command) 1466 1467 /** 1468 * megaraid_mbox_build_cmd - transform the mid-layer scsi commands 1469 * @adapter : controller's soft state 1470 * @scp : mid-layer scsi command pointer 1471 * @busy : set if request could not be completed because of lack of 1472 * resources 1473 * 1474 * Transform the mid-layer scsi command to megaraid firmware lingua. 1475 * Convert the command issued by mid-layer to format understood by megaraid 1476 * firmware. We also complete certain commands without sending them to firmware. 1477 */ 1478 static scb_t * 1479 megaraid_mbox_build_cmd(adapter_t *adapter, struct scsi_cmnd *scp, int *busy) 1480 { 1481 mraid_device_t *rdev = ADAP2RAIDDEV(adapter); 1482 int channel; 1483 int target; 1484 int islogical; 1485 mbox_ccb_t *ccb; 1486 mraid_passthru_t *pthru; 1487 mbox64_t *mbox64; 1488 mbox_t *mbox; 1489 scb_t *scb; 1490 char skip[] = "skipping"; 1491 char scan[] = "scanning"; 1492 char *ss; 1493 1494 1495 /* 1496 * Get the appropriate device map for the device this command is 1497 * intended for 1498 */ 1499 MRAID_GET_DEVICE_MAP(adapter, scp, channel, target, islogical); 1500 1501 /* 1502 * Logical drive commands 1503 */ 1504 if (islogical) { 1505 switch (scp->cmnd[0]) { 1506 case TEST_UNIT_READY: 1507 /* 1508 * Do we support clustering and is the support enabled 1509 * If no, return success always 1510 */ 1511 if (!adapter->ha) { 1512 scp->result = (DID_OK << 16); 1513 return NULL; 1514 } 1515 1516 if (!(scb = megaraid_alloc_scb(adapter, scp))) { 1517 scp->result = (DID_ERROR << 16); 1518 *busy = 1; 1519 return NULL; 1520 } 1521 1522 scb->dma_direction = scp->sc_data_direction; 1523 scb->dev_channel = 0xFF; 1524 scb->dev_target = target; 1525 ccb = (mbox_ccb_t *)scb->ccb; 1526 1527 /* 1528 * The command id will be provided by the command 1529 * issuance routine 1530 */ 1531 ccb->raw_mbox[0] = CLUSTER_CMD; 1532 ccb->raw_mbox[2] = RESERVATION_STATUS; 1533 ccb->raw_mbox[3] = target; 1534 1535 return scb; 1536 1537 case MODE_SENSE: 1538 { 1539 struct scatterlist *sgl; 1540 caddr_t vaddr; 1541 1542 sgl = scsi_sglist(scp); 1543 if (sg_page(sgl)) { 1544 vaddr = (caddr_t) sg_virt(&sgl[0]); 1545 1546 memset(vaddr, 0, scp->cmnd[4]); 1547 } 1548 else { 1549 con_log(CL_ANN, (KERN_WARNING 1550 "megaraid mailbox: invalid sg:%d\n", 1551 __LINE__)); 1552 } 1553 } 1554 scp->result = (DID_OK << 16); 1555 return NULL; 1556 1557 case INQUIRY: 1558 /* 1559 * Display the channel scan for logical drives 1560 * Do not display scan for a channel if already done. 1561 */ 1562 if (!(rdev->last_disp & (1L << SCP2CHANNEL(scp)))) { 1563 1564 con_log(CL_ANN, (KERN_INFO 1565 "scsi[%d]: scanning scsi channel %d", 1566 adapter->host->host_no, 1567 SCP2CHANNEL(scp))); 1568 1569 con_log(CL_ANN, ( 1570 " [virtual] for logical drives\n")); 1571 1572 rdev->last_disp |= (1L << SCP2CHANNEL(scp)); 1573 } 1574 1575 if (scp->cmnd[1] & MEGA_SCSI_INQ_EVPD) { 1576 scsi_build_sense(scp, 0, ILLEGAL_REQUEST, 1577 MEGA_INVALID_FIELD_IN_CDB, 0); 1578 return NULL; 1579 } 1580 1581 fallthrough; 1582 1583 case READ_CAPACITY: 1584 /* 1585 * Do not allow LUN > 0 for logical drives and 1586 * requests for more than 40 logical drives 1587 */ 1588 if (SCP2LUN(scp)) { 1589 scp->result = (DID_BAD_TARGET << 16); 1590 return NULL; 1591 } 1592 if ((target % 0x80) >= MAX_LOGICAL_DRIVES_40LD) { 1593 scp->result = (DID_BAD_TARGET << 16); 1594 return NULL; 1595 } 1596 1597 1598 /* Allocate a SCB and initialize passthru */ 1599 if (!(scb = megaraid_alloc_scb(adapter, scp))) { 1600 scp->result = (DID_ERROR << 16); 1601 *busy = 1; 1602 return NULL; 1603 } 1604 1605 ccb = (mbox_ccb_t *)scb->ccb; 1606 scb->dev_channel = 0xFF; 1607 scb->dev_target = target; 1608 pthru = ccb->pthru; 1609 mbox = ccb->mbox; 1610 mbox64 = ccb->mbox64; 1611 1612 pthru->timeout = 0; 1613 pthru->ars = 1; 1614 pthru->reqsenselen = 14; 1615 pthru->islogical = 1; 1616 pthru->logdrv = target; 1617 pthru->cdblen = scp->cmd_len; 1618 memcpy(pthru->cdb, scp->cmnd, scp->cmd_len); 1619 1620 mbox->cmd = MBOXCMD_PASSTHRU64; 1621 scb->dma_direction = scp->sc_data_direction; 1622 1623 pthru->dataxferlen = scsi_bufflen(scp); 1624 pthru->dataxferaddr = ccb->sgl_dma_h; 1625 pthru->numsge = megaraid_mbox_mksgl(adapter, 1626 scb); 1627 1628 mbox->xferaddr = 0xFFFFFFFF; 1629 mbox64->xferaddr_lo = (uint32_t )ccb->pthru_dma_h; 1630 mbox64->xferaddr_hi = 0; 1631 1632 return scb; 1633 1634 case READ_6: 1635 case WRITE_6: 1636 case READ_10: 1637 case WRITE_10: 1638 case READ_12: 1639 case WRITE_12: 1640 1641 /* 1642 * Allocate a SCB and initialize mailbox 1643 */ 1644 if (!(scb = megaraid_alloc_scb(adapter, scp))) { 1645 scp->result = (DID_ERROR << 16); 1646 *busy = 1; 1647 return NULL; 1648 } 1649 ccb = (mbox_ccb_t *)scb->ccb; 1650 scb->dev_channel = 0xFF; 1651 scb->dev_target = target; 1652 mbox = ccb->mbox; 1653 mbox64 = ccb->mbox64; 1654 mbox->logdrv = target; 1655 1656 /* 1657 * A little HACK: 2nd bit is zero for all scsi read 1658 * commands and is set for all scsi write commands 1659 */ 1660 mbox->cmd = (scp->cmnd[0] & 0x02) ? MBOXCMD_LWRITE64: 1661 MBOXCMD_LREAD64 ; 1662 1663 /* 1664 * 6-byte READ(0x08) or WRITE(0x0A) cdb 1665 */ 1666 if (scp->cmd_len == 6) { 1667 mbox->numsectors = (uint32_t)scp->cmnd[4]; 1668 mbox->lba = 1669 ((uint32_t)scp->cmnd[1] << 16) | 1670 ((uint32_t)scp->cmnd[2] << 8) | 1671 (uint32_t)scp->cmnd[3]; 1672 1673 mbox->lba &= 0x1FFFFF; 1674 } 1675 1676 /* 1677 * 10-byte READ(0x28) or WRITE(0x2A) cdb 1678 */ 1679 else if (scp->cmd_len == 10) { 1680 mbox->numsectors = 1681 (uint32_t)scp->cmnd[8] | 1682 ((uint32_t)scp->cmnd[7] << 8); 1683 mbox->lba = 1684 ((uint32_t)scp->cmnd[2] << 24) | 1685 ((uint32_t)scp->cmnd[3] << 16) | 1686 ((uint32_t)scp->cmnd[4] << 8) | 1687 (uint32_t)scp->cmnd[5]; 1688 } 1689 1690 /* 1691 * 12-byte READ(0xA8) or WRITE(0xAA) cdb 1692 */ 1693 else if (scp->cmd_len == 12) { 1694 mbox->lba = 1695 ((uint32_t)scp->cmnd[2] << 24) | 1696 ((uint32_t)scp->cmnd[3] << 16) | 1697 ((uint32_t)scp->cmnd[4] << 8) | 1698 (uint32_t)scp->cmnd[5]; 1699 1700 mbox->numsectors = 1701 ((uint32_t)scp->cmnd[6] << 24) | 1702 ((uint32_t)scp->cmnd[7] << 16) | 1703 ((uint32_t)scp->cmnd[8] << 8) | 1704 (uint32_t)scp->cmnd[9]; 1705 } 1706 else { 1707 con_log(CL_ANN, (KERN_WARNING 1708 "megaraid: unsupported CDB length\n")); 1709 1710 megaraid_dealloc_scb(adapter, scb); 1711 1712 scp->result = (DID_ERROR << 16); 1713 return NULL; 1714 } 1715 1716 scb->dma_direction = scp->sc_data_direction; 1717 1718 // Calculate Scatter-Gather info 1719 mbox64->xferaddr_lo = (uint32_t )ccb->sgl_dma_h; 1720 mbox->numsge = megaraid_mbox_mksgl(adapter, 1721 scb); 1722 mbox->xferaddr = 0xFFFFFFFF; 1723 mbox64->xferaddr_hi = 0; 1724 1725 return scb; 1726 1727 case RESERVE: 1728 case RELEASE: 1729 /* 1730 * Do we support clustering and is the support enabled 1731 */ 1732 if (!adapter->ha) { 1733 scp->result = (DID_BAD_TARGET << 16); 1734 return NULL; 1735 } 1736 1737 /* 1738 * Allocate a SCB and initialize mailbox 1739 */ 1740 if (!(scb = megaraid_alloc_scb(adapter, scp))) { 1741 scp->result = (DID_ERROR << 16); 1742 *busy = 1; 1743 return NULL; 1744 } 1745 1746 ccb = (mbox_ccb_t *)scb->ccb; 1747 scb->dev_channel = 0xFF; 1748 scb->dev_target = target; 1749 ccb->raw_mbox[0] = CLUSTER_CMD; 1750 ccb->raw_mbox[2] = (scp->cmnd[0] == RESERVE) ? 1751 RESERVE_LD : RELEASE_LD; 1752 1753 ccb->raw_mbox[3] = target; 1754 scb->dma_direction = scp->sc_data_direction; 1755 1756 return scb; 1757 1758 default: 1759 scp->result = (DID_BAD_TARGET << 16); 1760 return NULL; 1761 } 1762 } 1763 else { // Passthru device commands 1764 1765 // Do not allow access to target id > 15 or LUN > 7 1766 if (target > 15 || SCP2LUN(scp) > 7) { 1767 scp->result = (DID_BAD_TARGET << 16); 1768 return NULL; 1769 } 1770 1771 // if fast load option was set and scan for last device is 1772 // over, reset the fast_load flag so that during a possible 1773 // next scan, devices can be made available 1774 if (rdev->fast_load && (target == 15) && 1775 (SCP2CHANNEL(scp) == adapter->max_channel -1)) { 1776 1777 con_log(CL_ANN, (KERN_INFO 1778 "megaraid[%d]: physical device scan re-enabled\n", 1779 adapter->host->host_no)); 1780 rdev->fast_load = 0; 1781 } 1782 1783 /* 1784 * Display the channel scan for physical devices 1785 */ 1786 if (!(rdev->last_disp & (1L << SCP2CHANNEL(scp)))) { 1787 1788 ss = rdev->fast_load ? skip : scan; 1789 1790 con_log(CL_ANN, (KERN_INFO 1791 "scsi[%d]: %s scsi channel %d [Phy %d]", 1792 adapter->host->host_no, ss, SCP2CHANNEL(scp), 1793 channel)); 1794 1795 con_log(CL_ANN, ( 1796 " for non-raid devices\n")); 1797 1798 rdev->last_disp |= (1L << SCP2CHANNEL(scp)); 1799 } 1800 1801 // disable channel sweep if fast load option given 1802 if (rdev->fast_load) { 1803 scp->result = (DID_BAD_TARGET << 16); 1804 return NULL; 1805 } 1806 1807 // Allocate a SCB and initialize passthru 1808 if (!(scb = megaraid_alloc_scb(adapter, scp))) { 1809 scp->result = (DID_ERROR << 16); 1810 *busy = 1; 1811 return NULL; 1812 } 1813 1814 ccb = (mbox_ccb_t *)scb->ccb; 1815 scb->dev_channel = channel; 1816 scb->dev_target = target; 1817 scb->dma_direction = scp->sc_data_direction; 1818 mbox = ccb->mbox; 1819 mbox64 = ccb->mbox64; 1820 1821 // Does this firmware support extended CDBs 1822 if (adapter->max_cdb_sz == 16) { 1823 mbox->cmd = MBOXCMD_EXTPTHRU; 1824 1825 megaraid_mbox_prepare_epthru(adapter, scb, scp); 1826 1827 mbox64->xferaddr_lo = (uint32_t)ccb->epthru_dma_h; 1828 mbox64->xferaddr_hi = 0; 1829 mbox->xferaddr = 0xFFFFFFFF; 1830 } 1831 else { 1832 mbox->cmd = MBOXCMD_PASSTHRU64; 1833 1834 megaraid_mbox_prepare_pthru(adapter, scb, scp); 1835 1836 mbox64->xferaddr_lo = (uint32_t)ccb->pthru_dma_h; 1837 mbox64->xferaddr_hi = 0; 1838 mbox->xferaddr = 0xFFFFFFFF; 1839 } 1840 return scb; 1841 } 1842 1843 // NOT REACHED 1844 } 1845 1846 1847 /** 1848 * megaraid_mbox_runpendq - execute commands queued in the pending queue 1849 * @adapter : controller's soft state 1850 * @scb_q : SCB to be queued in the pending list 1851 * 1852 * Scan the pending list for commands which are not yet issued and try to 1853 * post to the controller. The SCB can be a null pointer, which would indicate 1854 * no SCB to be queue, just try to execute the ones in the pending list. 1855 * 1856 * NOTE: We do not actually traverse the pending list. The SCBs are plucked 1857 * out from the head of the pending list. If it is successfully issued, the 1858 * next SCB is at the head now. 1859 */ 1860 static void 1861 megaraid_mbox_runpendq(adapter_t *adapter, scb_t *scb_q) 1862 { 1863 scb_t *scb; 1864 unsigned long flags; 1865 1866 spin_lock_irqsave(PENDING_LIST_LOCK(adapter), flags); 1867 1868 if (scb_q) { 1869 scb_q->state = SCB_PENDQ; 1870 list_add_tail(&scb_q->list, &adapter->pend_list); 1871 } 1872 1873 // if the adapter in not in quiescent mode, post the commands to FW 1874 if (adapter->quiescent) { 1875 spin_unlock_irqrestore(PENDING_LIST_LOCK(adapter), flags); 1876 return; 1877 } 1878 1879 while (!list_empty(&adapter->pend_list)) { 1880 1881 assert_spin_locked(PENDING_LIST_LOCK(adapter)); 1882 1883 scb = list_entry(adapter->pend_list.next, scb_t, list); 1884 1885 // remove the scb from the pending list and try to 1886 // issue. If we are unable to issue it, put back in 1887 // the pending list and return 1888 1889 list_del_init(&scb->list); 1890 1891 spin_unlock_irqrestore(PENDING_LIST_LOCK(adapter), flags); 1892 1893 // if mailbox was busy, return SCB back to pending 1894 // list. Make sure to add at the head, since that's 1895 // where it would have been removed from 1896 1897 scb->state = SCB_ISSUED; 1898 1899 if (mbox_post_cmd(adapter, scb) != 0) { 1900 1901 spin_lock_irqsave(PENDING_LIST_LOCK(adapter), flags); 1902 1903 scb->state = SCB_PENDQ; 1904 1905 list_add(&scb->list, &adapter->pend_list); 1906 1907 spin_unlock_irqrestore(PENDING_LIST_LOCK(adapter), 1908 flags); 1909 1910 return; 1911 } 1912 1913 spin_lock_irqsave(PENDING_LIST_LOCK(adapter), flags); 1914 } 1915 1916 spin_unlock_irqrestore(PENDING_LIST_LOCK(adapter), flags); 1917 1918 1919 return; 1920 } 1921 1922 1923 /** 1924 * megaraid_mbox_prepare_pthru - prepare a command for physical devices 1925 * @adapter : pointer to controller's soft state 1926 * @scb : scsi control block 1927 * @scp : scsi command from the mid-layer 1928 * 1929 * Prepare a command for the scsi physical devices. 1930 */ 1931 static void 1932 megaraid_mbox_prepare_pthru(adapter_t *adapter, scb_t *scb, 1933 struct scsi_cmnd *scp) 1934 { 1935 mbox_ccb_t *ccb; 1936 mraid_passthru_t *pthru; 1937 uint8_t channel; 1938 uint8_t target; 1939 1940 ccb = (mbox_ccb_t *)scb->ccb; 1941 pthru = ccb->pthru; 1942 channel = scb->dev_channel; 1943 target = scb->dev_target; 1944 1945 // 0=6sec, 1=60sec, 2=10min, 3=3hrs, 4=NO timeout 1946 pthru->timeout = 4; 1947 pthru->ars = 1; 1948 pthru->islogical = 0; 1949 pthru->channel = 0; 1950 pthru->target = (channel << 4) | target; 1951 pthru->logdrv = SCP2LUN(scp); 1952 pthru->reqsenselen = 14; 1953 pthru->cdblen = scp->cmd_len; 1954 1955 memcpy(pthru->cdb, scp->cmnd, scp->cmd_len); 1956 1957 if (scsi_bufflen(scp)) { 1958 pthru->dataxferlen = scsi_bufflen(scp); 1959 pthru->dataxferaddr = ccb->sgl_dma_h; 1960 pthru->numsge = megaraid_mbox_mksgl(adapter, scb); 1961 } 1962 else { 1963 pthru->dataxferaddr = 0; 1964 pthru->dataxferlen = 0; 1965 pthru->numsge = 0; 1966 } 1967 return; 1968 } 1969 1970 1971 /** 1972 * megaraid_mbox_prepare_epthru - prepare a command for physical devices 1973 * @adapter : pointer to controller's soft state 1974 * @scb : scsi control block 1975 * @scp : scsi command from the mid-layer 1976 * 1977 * Prepare a command for the scsi physical devices. This routine prepares 1978 * commands for devices which can take extended CDBs (>10 bytes). 1979 */ 1980 static void 1981 megaraid_mbox_prepare_epthru(adapter_t *adapter, scb_t *scb, 1982 struct scsi_cmnd *scp) 1983 { 1984 mbox_ccb_t *ccb; 1985 mraid_epassthru_t *epthru; 1986 uint8_t channel; 1987 uint8_t target; 1988 1989 ccb = (mbox_ccb_t *)scb->ccb; 1990 epthru = ccb->epthru; 1991 channel = scb->dev_channel; 1992 target = scb->dev_target; 1993 1994 // 0=6sec, 1=60sec, 2=10min, 3=3hrs, 4=NO timeout 1995 epthru->timeout = 4; 1996 epthru->ars = 1; 1997 epthru->islogical = 0; 1998 epthru->channel = 0; 1999 epthru->target = (channel << 4) | target; 2000 epthru->logdrv = SCP2LUN(scp); 2001 epthru->reqsenselen = 14; 2002 epthru->cdblen = scp->cmd_len; 2003 2004 memcpy(epthru->cdb, scp->cmnd, scp->cmd_len); 2005 2006 if (scsi_bufflen(scp)) { 2007 epthru->dataxferlen = scsi_bufflen(scp); 2008 epthru->dataxferaddr = ccb->sgl_dma_h; 2009 epthru->numsge = megaraid_mbox_mksgl(adapter, scb); 2010 } 2011 else { 2012 epthru->dataxferaddr = 0; 2013 epthru->dataxferlen = 0; 2014 epthru->numsge = 0; 2015 } 2016 return; 2017 } 2018 2019 2020 /** 2021 * megaraid_ack_sequence - interrupt ack sequence for memory mapped HBAs 2022 * @adapter : controller's soft state 2023 * 2024 * Interrupt acknowledgement sequence for memory mapped HBAs. Find out the 2025 * completed command and put them on the completed list for later processing. 2026 * 2027 * Returns: 1 if the interrupt is valid, 0 otherwise 2028 */ 2029 static int 2030 megaraid_ack_sequence(adapter_t *adapter) 2031 { 2032 mraid_device_t *raid_dev = ADAP2RAIDDEV(adapter); 2033 mbox_t *mbox; 2034 scb_t *scb; 2035 uint8_t nstatus; 2036 uint8_t completed[MBOX_MAX_FIRMWARE_STATUS]; 2037 struct list_head clist; 2038 int handled; 2039 uint32_t dword; 2040 unsigned long flags; 2041 int i, j; 2042 2043 2044 mbox = raid_dev->mbox; 2045 2046 // move the SCBs from the firmware completed array to our local list 2047 INIT_LIST_HEAD(&clist); 2048 2049 // loop till F/W has more commands for us to complete 2050 handled = 0; 2051 spin_lock_irqsave(MAILBOX_LOCK(raid_dev), flags); 2052 do { 2053 /* 2054 * Check if a valid interrupt is pending. If found, force the 2055 * interrupt line low. 2056 */ 2057 dword = RDOUTDOOR(raid_dev); 2058 if (dword != 0x10001234) break; 2059 2060 handled = 1; 2061 2062 WROUTDOOR(raid_dev, 0x10001234); 2063 2064 nstatus = 0; 2065 // wait for valid numstatus to post 2066 for (i = 0; i < 0xFFFFF; i++) { 2067 if (mbox->numstatus != 0xFF) { 2068 nstatus = mbox->numstatus; 2069 break; 2070 } 2071 rmb(); 2072 } 2073 mbox->numstatus = 0xFF; 2074 2075 adapter->outstanding_cmds -= nstatus; 2076 2077 for (i = 0; i < nstatus; i++) { 2078 2079 // wait for valid command index to post 2080 for (j = 0; j < 0xFFFFF; j++) { 2081 if (mbox->completed[i] != 0xFF) break; 2082 rmb(); 2083 } 2084 completed[i] = mbox->completed[i]; 2085 mbox->completed[i] = 0xFF; 2086 2087 if (completed[i] == 0xFF) { 2088 con_log(CL_ANN, (KERN_CRIT 2089 "megaraid: command posting timed out\n")); 2090 2091 BUG(); 2092 continue; 2093 } 2094 2095 // Get SCB associated with this command id 2096 if (completed[i] >= MBOX_MAX_SCSI_CMDS) { 2097 // a cmm command 2098 scb = adapter->uscb_list + (completed[i] - 2099 MBOX_MAX_SCSI_CMDS); 2100 } 2101 else { 2102 // an os command 2103 scb = adapter->kscb_list + completed[i]; 2104 } 2105 2106 scb->status = mbox->status; 2107 list_add_tail(&scb->list, &clist); 2108 } 2109 2110 // Acknowledge interrupt 2111 WRINDOOR(raid_dev, 0x02); 2112 2113 } while(1); 2114 2115 spin_unlock_irqrestore(MAILBOX_LOCK(raid_dev), flags); 2116 2117 2118 // put the completed commands in the completed list. DPC would 2119 // complete these commands later 2120 spin_lock_irqsave(COMPLETED_LIST_LOCK(adapter), flags); 2121 2122 list_splice(&clist, &adapter->completed_list); 2123 2124 spin_unlock_irqrestore(COMPLETED_LIST_LOCK(adapter), flags); 2125 2126 2127 // schedule the DPC if there is some work for it 2128 if (handled) 2129 tasklet_schedule(&adapter->dpc_h); 2130 2131 return handled; 2132 } 2133 2134 2135 /** 2136 * megaraid_isr - isr for memory based mailbox based controllers 2137 * @irq : irq 2138 * @devp : pointer to our soft state 2139 * 2140 * Interrupt service routine for memory-mapped mailbox controllers. 2141 */ 2142 static irqreturn_t 2143 megaraid_isr(int irq, void *devp) 2144 { 2145 adapter_t *adapter = devp; 2146 int handled; 2147 2148 handled = megaraid_ack_sequence(adapter); 2149 2150 /* Loop through any pending requests */ 2151 if (!adapter->quiescent) { 2152 megaraid_mbox_runpendq(adapter, NULL); 2153 } 2154 2155 return IRQ_RETVAL(handled); 2156 } 2157 2158 2159 /** 2160 * megaraid_mbox_dpc - the tasklet to complete the commands from completed list 2161 * @devp : pointer to HBA soft state 2162 * 2163 * Pick up the commands from the completed list and send back to the owners. 2164 * This is a reentrant function and does not assume any locks are held while 2165 * it is being called. 2166 */ 2167 static void 2168 megaraid_mbox_dpc(unsigned long devp) 2169 { 2170 adapter_t *adapter = (adapter_t *)devp; 2171 mraid_device_t *raid_dev; 2172 struct list_head clist; 2173 struct scatterlist *sgl; 2174 scb_t *scb; 2175 scb_t *tmp; 2176 struct scsi_cmnd *scp; 2177 mraid_passthru_t *pthru; 2178 mraid_epassthru_t *epthru; 2179 mbox_ccb_t *ccb; 2180 int islogical; 2181 int pdev_index; 2182 int pdev_state; 2183 mbox_t *mbox; 2184 unsigned long flags; 2185 uint8_t c; 2186 int status; 2187 uioc_t *kioc; 2188 2189 2190 if (!adapter) return; 2191 2192 raid_dev = ADAP2RAIDDEV(adapter); 2193 2194 // move the SCBs from the completed list to our local list 2195 INIT_LIST_HEAD(&clist); 2196 2197 spin_lock_irqsave(COMPLETED_LIST_LOCK(adapter), flags); 2198 2199 list_splice_init(&adapter->completed_list, &clist); 2200 2201 spin_unlock_irqrestore(COMPLETED_LIST_LOCK(adapter), flags); 2202 2203 2204 list_for_each_entry_safe(scb, tmp, &clist, list) { 2205 2206 status = scb->status; 2207 scp = scb->scp; 2208 ccb = (mbox_ccb_t *)scb->ccb; 2209 pthru = ccb->pthru; 2210 epthru = ccb->epthru; 2211 mbox = ccb->mbox; 2212 2213 // Make sure f/w has completed a valid command 2214 if (scb->state != SCB_ISSUED) { 2215 con_log(CL_ANN, (KERN_CRIT 2216 "megaraid critical err: invalid command %d:%d:%p\n", 2217 scb->sno, scb->state, scp)); 2218 BUG(); 2219 continue; // Must never happen! 2220 } 2221 2222 // check for the management command and complete it right away 2223 if (scb->sno >= MBOX_MAX_SCSI_CMDS) { 2224 scb->state = SCB_FREE; 2225 scb->status = status; 2226 2227 // remove from local clist 2228 list_del_init(&scb->list); 2229 2230 kioc = (uioc_t *)scb->gp; 2231 kioc->status = 0; 2232 2233 megaraid_mbox_mm_done(adapter, scb); 2234 2235 continue; 2236 } 2237 2238 // Was an abort issued for this command earlier 2239 if (scb->state & SCB_ABORT) { 2240 con_log(CL_ANN, (KERN_NOTICE 2241 "megaraid: aborted cmd [%x] completed\n", 2242 scb->sno)); 2243 } 2244 2245 /* 2246 * If the inquiry came of a disk drive which is not part of 2247 * any RAID array, expose it to the kernel. For this to be 2248 * enabled, user must set the "megaraid_expose_unconf_disks" 2249 * flag to 1 by specifying it on module parameter list. 2250 * This would enable data migration off drives from other 2251 * configurations. 2252 */ 2253 islogical = MRAID_IS_LOGICAL(adapter, scp); 2254 if (scp->cmnd[0] == INQUIRY && status == 0 && islogical == 0 2255 && IS_RAID_CH(raid_dev, scb->dev_channel)) { 2256 2257 sgl = scsi_sglist(scp); 2258 if (sg_page(sgl)) { 2259 c = *(unsigned char *) sg_virt(&sgl[0]); 2260 } else { 2261 con_log(CL_ANN, (KERN_WARNING 2262 "megaraid mailbox: invalid sg:%d\n", 2263 __LINE__)); 2264 c = 0; 2265 } 2266 2267 if ((c & 0x1F ) == TYPE_DISK) { 2268 pdev_index = (scb->dev_channel * 16) + 2269 scb->dev_target; 2270 pdev_state = 2271 raid_dev->pdrv_state[pdev_index] & 0x0F; 2272 2273 if (pdev_state == PDRV_ONLINE || 2274 pdev_state == PDRV_FAILED || 2275 pdev_state == PDRV_RBLD || 2276 pdev_state == PDRV_HOTSPARE || 2277 megaraid_expose_unconf_disks == 0) { 2278 2279 status = 0xF0; 2280 } 2281 } 2282 } 2283 2284 // Convert MegaRAID status to Linux error code 2285 switch (status) { 2286 2287 case 0x00: 2288 2289 scp->result = (DID_OK << 16); 2290 break; 2291 2292 case 0x02: 2293 2294 /* set sense_buffer and result fields */ 2295 if (mbox->cmd == MBOXCMD_PASSTHRU || 2296 mbox->cmd == MBOXCMD_PASSTHRU64) { 2297 2298 memcpy(scp->sense_buffer, pthru->reqsensearea, 2299 14); 2300 2301 scp->result = SAM_STAT_CHECK_CONDITION; 2302 } 2303 else { 2304 if (mbox->cmd == MBOXCMD_EXTPTHRU) { 2305 2306 memcpy(scp->sense_buffer, 2307 epthru->reqsensearea, 14); 2308 2309 scp->result = SAM_STAT_CHECK_CONDITION; 2310 } else 2311 scsi_build_sense(scp, 0, 2312 ABORTED_COMMAND, 0, 0); 2313 } 2314 break; 2315 2316 case 0x08: 2317 2318 scp->result = DID_BUS_BUSY << 16 | status; 2319 break; 2320 2321 default: 2322 2323 /* 2324 * If TEST_UNIT_READY fails, we know RESERVATION_STATUS 2325 * failed 2326 */ 2327 if (scp->cmnd[0] == TEST_UNIT_READY) { 2328 scp->result = DID_ERROR << 16 | 2329 SAM_STAT_RESERVATION_CONFLICT; 2330 } 2331 else 2332 /* 2333 * Error code returned is 1 if Reserve or Release 2334 * failed or the input parameter is invalid 2335 */ 2336 if (status == 1 && (scp->cmnd[0] == RESERVE || 2337 scp->cmnd[0] == RELEASE)) { 2338 2339 scp->result = DID_ERROR << 16 | 2340 SAM_STAT_RESERVATION_CONFLICT; 2341 } 2342 else { 2343 scp->result = DID_BAD_TARGET << 16 | status; 2344 } 2345 } 2346 2347 // print a debug message for all failed commands 2348 if (status) { 2349 megaraid_mbox_display_scb(adapter, scb); 2350 } 2351 2352 scsi_dma_unmap(scp); 2353 2354 // remove from local clist 2355 list_del_init(&scb->list); 2356 2357 // put back in free list 2358 megaraid_dealloc_scb(adapter, scb); 2359 2360 // send the scsi packet back to kernel 2361 scp->scsi_done(scp); 2362 } 2363 2364 return; 2365 } 2366 2367 2368 /** 2369 * megaraid_abort_handler - abort the scsi command 2370 * @scp : command to be aborted 2371 * 2372 * Abort a previous SCSI request. Only commands on the pending list can be 2373 * aborted. All the commands issued to the F/W must complete. 2374 **/ 2375 static int 2376 megaraid_abort_handler(struct scsi_cmnd *scp) 2377 { 2378 adapter_t *adapter; 2379 mraid_device_t *raid_dev; 2380 scb_t *scb; 2381 scb_t *tmp; 2382 int found; 2383 unsigned long flags; 2384 int i; 2385 2386 2387 adapter = SCP2ADAPTER(scp); 2388 raid_dev = ADAP2RAIDDEV(adapter); 2389 2390 con_log(CL_ANN, (KERN_WARNING 2391 "megaraid: aborting cmd=%x <c=%d t=%d l=%d>\n", 2392 scp->cmnd[0], SCP2CHANNEL(scp), 2393 SCP2TARGET(scp), SCP2LUN(scp))); 2394 2395 // If FW has stopped responding, simply return failure 2396 if (raid_dev->hw_error) { 2397 con_log(CL_ANN, (KERN_NOTICE 2398 "megaraid: hw error, not aborting\n")); 2399 return FAILED; 2400 } 2401 2402 // There might a race here, where the command was completed by the 2403 // firmware and now it is on the completed list. Before we could 2404 // complete the command to the kernel in dpc, the abort came. 2405 // Find out if this is the case to avoid the race. 2406 scb = NULL; 2407 spin_lock_irqsave(COMPLETED_LIST_LOCK(adapter), flags); 2408 list_for_each_entry_safe(scb, tmp, &adapter->completed_list, list) { 2409 2410 if (scb->scp == scp) { // Found command 2411 2412 list_del_init(&scb->list); // from completed list 2413 2414 con_log(CL_ANN, (KERN_WARNING 2415 "megaraid: %d[%d:%d], abort from completed list\n", 2416 scb->sno, scb->dev_channel, scb->dev_target)); 2417 2418 scp->result = (DID_ABORT << 16); 2419 scp->scsi_done(scp); 2420 2421 megaraid_dealloc_scb(adapter, scb); 2422 2423 spin_unlock_irqrestore(COMPLETED_LIST_LOCK(adapter), 2424 flags); 2425 2426 return SUCCESS; 2427 } 2428 } 2429 spin_unlock_irqrestore(COMPLETED_LIST_LOCK(adapter), flags); 2430 2431 2432 // Find out if this command is still on the pending list. If it is and 2433 // was never issued, abort and return success. If the command is owned 2434 // by the firmware, we must wait for it to complete by the FW. 2435 spin_lock_irqsave(PENDING_LIST_LOCK(adapter), flags); 2436 list_for_each_entry_safe(scb, tmp, &adapter->pend_list, list) { 2437 2438 if (scb->scp == scp) { // Found command 2439 2440 list_del_init(&scb->list); // from pending list 2441 2442 ASSERT(!(scb->state & SCB_ISSUED)); 2443 2444 con_log(CL_ANN, (KERN_WARNING 2445 "megaraid abort: [%d:%d], driver owner\n", 2446 scb->dev_channel, scb->dev_target)); 2447 2448 scp->result = (DID_ABORT << 16); 2449 scp->scsi_done(scp); 2450 2451 megaraid_dealloc_scb(adapter, scb); 2452 2453 spin_unlock_irqrestore(PENDING_LIST_LOCK(adapter), 2454 flags); 2455 2456 return SUCCESS; 2457 } 2458 } 2459 spin_unlock_irqrestore(PENDING_LIST_LOCK(adapter), flags); 2460 2461 2462 // Check do we even own this command, in which case this would be 2463 // owned by the firmware. The only way to locate the FW scb is to 2464 // traverse through the list of all SCB, since driver does not 2465 // maintain these SCBs on any list 2466 found = 0; 2467 spin_lock_irq(&adapter->lock); 2468 for (i = 0; i < MBOX_MAX_SCSI_CMDS; i++) { 2469 scb = adapter->kscb_list + i; 2470 2471 if (scb->scp == scp) { 2472 2473 found = 1; 2474 2475 if (!(scb->state & SCB_ISSUED)) { 2476 con_log(CL_ANN, (KERN_WARNING 2477 "megaraid abort: %d[%d:%d], invalid state\n", 2478 scb->sno, scb->dev_channel, scb->dev_target)); 2479 BUG(); 2480 } 2481 else { 2482 con_log(CL_ANN, (KERN_WARNING 2483 "megaraid abort: %d[%d:%d], fw owner\n", 2484 scb->sno, scb->dev_channel, scb->dev_target)); 2485 } 2486 } 2487 } 2488 spin_unlock_irq(&adapter->lock); 2489 2490 if (!found) { 2491 con_log(CL_ANN, (KERN_WARNING "megaraid abort: do now own\n")); 2492 2493 // FIXME: Should there be a callback for this command? 2494 return SUCCESS; 2495 } 2496 2497 // We cannot actually abort a command owned by firmware, return 2498 // failure and wait for reset. In host reset handler, we will find out 2499 // if the HBA is still live 2500 return FAILED; 2501 } 2502 2503 /** 2504 * megaraid_reset_handler - device reset handler for mailbox based driver 2505 * @scp : reference command 2506 * 2507 * Reset handler for the mailbox based controller. First try to find out if 2508 * the FW is still live, in which case the outstanding commands counter mut go 2509 * down to 0. If that happens, also issue the reservation reset command to 2510 * relinquish (possible) reservations on the logical drives connected to this 2511 * host. 2512 **/ 2513 static int 2514 megaraid_reset_handler(struct scsi_cmnd *scp) 2515 { 2516 adapter_t *adapter; 2517 scb_t *scb; 2518 scb_t *tmp; 2519 mraid_device_t *raid_dev; 2520 unsigned long flags; 2521 uint8_t raw_mbox[sizeof(mbox_t)]; 2522 int rval; 2523 int recovery_window; 2524 int i; 2525 uioc_t *kioc; 2526 2527 adapter = SCP2ADAPTER(scp); 2528 raid_dev = ADAP2RAIDDEV(adapter); 2529 2530 // return failure if adapter is not responding 2531 if (raid_dev->hw_error) { 2532 con_log(CL_ANN, (KERN_NOTICE 2533 "megaraid: hw error, cannot reset\n")); 2534 return FAILED; 2535 } 2536 2537 // Under exceptional conditions, FW can take up to 3 minutes to 2538 // complete command processing. Wait for additional 2 minutes for the 2539 // pending commands counter to go down to 0. If it doesn't, let the 2540 // controller be marked offline 2541 // Also, reset all the commands currently owned by the driver 2542 spin_lock_irqsave(PENDING_LIST_LOCK(adapter), flags); 2543 list_for_each_entry_safe(scb, tmp, &adapter->pend_list, list) { 2544 list_del_init(&scb->list); // from pending list 2545 2546 if (scb->sno >= MBOX_MAX_SCSI_CMDS) { 2547 con_log(CL_ANN, (KERN_WARNING 2548 "megaraid: IOCTL packet with %d[%d:%d] being reset\n", 2549 scb->sno, scb->dev_channel, scb->dev_target)); 2550 2551 scb->status = -1; 2552 2553 kioc = (uioc_t *)scb->gp; 2554 kioc->status = -EFAULT; 2555 2556 megaraid_mbox_mm_done(adapter, scb); 2557 } else { 2558 if (scb->scp == scp) { // Found command 2559 con_log(CL_ANN, (KERN_WARNING 2560 "megaraid: %d[%d:%d], reset from pending list\n", 2561 scb->sno, scb->dev_channel, scb->dev_target)); 2562 } else { 2563 con_log(CL_ANN, (KERN_WARNING 2564 "megaraid: IO packet with %d[%d:%d] being reset\n", 2565 scb->sno, scb->dev_channel, scb->dev_target)); 2566 } 2567 2568 scb->scp->result = (DID_RESET << 16); 2569 scb->scp->scsi_done(scb->scp); 2570 2571 megaraid_dealloc_scb(adapter, scb); 2572 } 2573 } 2574 spin_unlock_irqrestore(PENDING_LIST_LOCK(adapter), flags); 2575 2576 if (adapter->outstanding_cmds) { 2577 con_log(CL_ANN, (KERN_NOTICE 2578 "megaraid: %d outstanding commands. Max wait %d sec\n", 2579 adapter->outstanding_cmds, 2580 (MBOX_RESET_WAIT + MBOX_RESET_EXT_WAIT))); 2581 } 2582 2583 recovery_window = MBOX_RESET_WAIT + MBOX_RESET_EXT_WAIT; 2584 2585 for (i = 0; i < recovery_window; i++) { 2586 2587 megaraid_ack_sequence(adapter); 2588 2589 // print a message once every 5 seconds only 2590 if (!(i % 5)) { 2591 con_log(CL_ANN, ( 2592 "megaraid mbox: Wait for %d commands to complete:%d\n", 2593 adapter->outstanding_cmds, 2594 (MBOX_RESET_WAIT + MBOX_RESET_EXT_WAIT) - i)); 2595 } 2596 2597 // bailout if no recovery happened in reset time 2598 if (adapter->outstanding_cmds == 0) { 2599 break; 2600 } 2601 2602 msleep(1000); 2603 } 2604 2605 spin_lock(&adapter->lock); 2606 2607 // If still outstanding commands, bail out 2608 if (adapter->outstanding_cmds) { 2609 con_log(CL_ANN, (KERN_WARNING 2610 "megaraid mbox: critical hardware error!\n")); 2611 2612 raid_dev->hw_error = 1; 2613 2614 rval = FAILED; 2615 goto out; 2616 } 2617 else { 2618 con_log(CL_ANN, (KERN_NOTICE 2619 "megaraid mbox: reset sequence completed successfully\n")); 2620 } 2621 2622 2623 // If the controller supports clustering, reset reservations 2624 if (!adapter->ha) { 2625 rval = SUCCESS; 2626 goto out; 2627 } 2628 2629 // clear reservations if any 2630 raw_mbox[0] = CLUSTER_CMD; 2631 raw_mbox[2] = RESET_RESERVATIONS; 2632 2633 rval = SUCCESS; 2634 if (mbox_post_sync_cmd_fast(adapter, raw_mbox) == 0) { 2635 con_log(CL_ANN, 2636 (KERN_INFO "megaraid: reservation reset\n")); 2637 } 2638 else { 2639 rval = FAILED; 2640 con_log(CL_ANN, (KERN_WARNING 2641 "megaraid: reservation reset failed\n")); 2642 } 2643 2644 out: 2645 spin_unlock(&adapter->lock); 2646 return rval; 2647 } 2648 2649 /* 2650 * START: internal commands library 2651 * 2652 * This section of the driver has the common routine used by the driver and 2653 * also has all the FW routines 2654 */ 2655 2656 /** 2657 * mbox_post_sync_cmd() - blocking command to the mailbox based controllers 2658 * @adapter : controller's soft state 2659 * @raw_mbox : the mailbox 2660 * 2661 * Issue a scb in synchronous and non-interrupt mode for mailbox based 2662 * controllers. 2663 */ 2664 static int 2665 mbox_post_sync_cmd(adapter_t *adapter, uint8_t raw_mbox[]) 2666 { 2667 mraid_device_t *raid_dev = ADAP2RAIDDEV(adapter); 2668 mbox_t *mbox; 2669 uint8_t status; 2670 int i; 2671 2672 mbox = raid_dev->mbox; 2673 2674 /* 2675 * Wait until mailbox is free 2676 */ 2677 if (megaraid_busywait_mbox(raid_dev) != 0) 2678 goto blocked_mailbox; 2679 2680 /* 2681 * Copy mailbox data into host structure 2682 */ 2683 memcpy((caddr_t)mbox, (caddr_t)raw_mbox, 16); 2684 mbox->cmdid = 0xFE; 2685 mbox->busy = 1; 2686 mbox->poll = 0; 2687 mbox->ack = 0; 2688 mbox->numstatus = 0xFF; 2689 mbox->status = 0xFF; 2690 2691 wmb(); 2692 WRINDOOR(raid_dev, raid_dev->mbox_dma | 0x1); 2693 2694 // wait for maximum 1 second for status to post. If the status is not 2695 // available within 1 second, assume FW is initializing and wait 2696 // for an extended amount of time 2697 if (mbox->numstatus == 0xFF) { // status not yet available 2698 udelay(25); 2699 2700 for (i = 0; mbox->numstatus == 0xFF && i < 1000; i++) { 2701 rmb(); 2702 msleep(1); 2703 } 2704 2705 2706 if (i == 1000) { 2707 con_log(CL_ANN, (KERN_NOTICE 2708 "megaraid mailbox: wait for FW to boot ")); 2709 2710 for (i = 0; (mbox->numstatus == 0xFF) && 2711 (i < MBOX_RESET_WAIT); i++) { 2712 rmb(); 2713 con_log(CL_ANN, ("\b\b\b\b\b[%03d]", 2714 MBOX_RESET_WAIT - i)); 2715 msleep(1000); 2716 } 2717 2718 if (i == MBOX_RESET_WAIT) { 2719 2720 con_log(CL_ANN, ( 2721 "\nmegaraid mailbox: status not available\n")); 2722 2723 return -1; 2724 } 2725 con_log(CL_ANN, ("\b\b\b\b\b[ok] \n")); 2726 } 2727 } 2728 2729 // wait for maximum 1 second for poll semaphore 2730 if (mbox->poll != 0x77) { 2731 udelay(25); 2732 2733 for (i = 0; (mbox->poll != 0x77) && (i < 1000); i++) { 2734 rmb(); 2735 msleep(1); 2736 } 2737 2738 if (i == 1000) { 2739 con_log(CL_ANN, (KERN_WARNING 2740 "megaraid mailbox: could not get poll semaphore\n")); 2741 return -1; 2742 } 2743 } 2744 2745 WRINDOOR(raid_dev, raid_dev->mbox_dma | 0x2); 2746 wmb(); 2747 2748 // wait for maximum 1 second for acknowledgement 2749 if (RDINDOOR(raid_dev) & 0x2) { 2750 udelay(25); 2751 2752 for (i = 0; (RDINDOOR(raid_dev) & 0x2) && (i < 1000); i++) { 2753 rmb(); 2754 msleep(1); 2755 } 2756 2757 if (i == 1000) { 2758 con_log(CL_ANN, (KERN_WARNING 2759 "megaraid mailbox: could not acknowledge\n")); 2760 return -1; 2761 } 2762 } 2763 mbox->poll = 0; 2764 mbox->ack = 0x77; 2765 2766 status = mbox->status; 2767 2768 // invalidate the completed command id array. After command 2769 // completion, firmware would write the valid id. 2770 mbox->numstatus = 0xFF; 2771 mbox->status = 0xFF; 2772 for (i = 0; i < MBOX_MAX_FIRMWARE_STATUS; i++) { 2773 mbox->completed[i] = 0xFF; 2774 } 2775 2776 return status; 2777 2778 blocked_mailbox: 2779 2780 con_log(CL_ANN, (KERN_WARNING "megaraid: blocked mailbox\n") ); 2781 return -1; 2782 } 2783 2784 2785 /** 2786 * mbox_post_sync_cmd_fast - blocking command to the mailbox based controllers 2787 * @adapter : controller's soft state 2788 * @raw_mbox : the mailbox 2789 * 2790 * Issue a scb in synchronous and non-interrupt mode for mailbox based 2791 * controllers. This is a faster version of the synchronous command and 2792 * therefore can be called in interrupt-context as well. 2793 */ 2794 static int 2795 mbox_post_sync_cmd_fast(adapter_t *adapter, uint8_t raw_mbox[]) 2796 { 2797 mraid_device_t *raid_dev = ADAP2RAIDDEV(adapter); 2798 mbox_t *mbox; 2799 long i; 2800 2801 2802 mbox = raid_dev->mbox; 2803 2804 // return immediately if the mailbox is busy 2805 if (mbox->busy) return -1; 2806 2807 // Copy mailbox data into host structure 2808 memcpy((caddr_t)mbox, (caddr_t)raw_mbox, 14); 2809 mbox->cmdid = 0xFE; 2810 mbox->busy = 1; 2811 mbox->poll = 0; 2812 mbox->ack = 0; 2813 mbox->numstatus = 0xFF; 2814 mbox->status = 0xFF; 2815 2816 wmb(); 2817 WRINDOOR(raid_dev, raid_dev->mbox_dma | 0x1); 2818 2819 for (i = 0; i < MBOX_SYNC_WAIT_CNT; i++) { 2820 if (mbox->numstatus != 0xFF) break; 2821 rmb(); 2822 udelay(MBOX_SYNC_DELAY_200); 2823 } 2824 2825 if (i == MBOX_SYNC_WAIT_CNT) { 2826 // We may need to re-calibrate the counter 2827 con_log(CL_ANN, (KERN_CRIT 2828 "megaraid: fast sync command timed out\n")); 2829 } 2830 2831 WRINDOOR(raid_dev, raid_dev->mbox_dma | 0x2); 2832 wmb(); 2833 2834 return mbox->status; 2835 } 2836 2837 2838 /** 2839 * megaraid_busywait_mbox() - Wait until the controller's mailbox is available 2840 * @raid_dev : RAID device (HBA) soft state 2841 * 2842 * Wait until the controller's mailbox is available to accept more commands. 2843 * Wait for at most 1 second. 2844 */ 2845 static int 2846 megaraid_busywait_mbox(mraid_device_t *raid_dev) 2847 { 2848 mbox_t *mbox = raid_dev->mbox; 2849 int i = 0; 2850 2851 if (mbox->busy) { 2852 udelay(25); 2853 for (i = 0; mbox->busy && i < 1000; i++) 2854 msleep(1); 2855 } 2856 2857 if (i < 1000) return 0; 2858 else return -1; 2859 } 2860 2861 2862 /** 2863 * megaraid_mbox_product_info - some static information about the controller 2864 * @adapter : our soft state 2865 * 2866 * Issue commands to the controller to grab some parameters required by our 2867 * caller. 2868 */ 2869 static int 2870 megaraid_mbox_product_info(adapter_t *adapter) 2871 { 2872 mraid_device_t *raid_dev = ADAP2RAIDDEV(adapter); 2873 mbox_t *mbox; 2874 uint8_t raw_mbox[sizeof(mbox_t)]; 2875 mraid_pinfo_t *pinfo; 2876 dma_addr_t pinfo_dma_h; 2877 mraid_inquiry3_t *mraid_inq3; 2878 int i; 2879 2880 2881 memset((caddr_t)raw_mbox, 0, sizeof(raw_mbox)); 2882 mbox = (mbox_t *)raw_mbox; 2883 2884 /* 2885 * Issue an ENQUIRY3 command to find out certain adapter parameters, 2886 * e.g., max channels, max commands etc. 2887 */ 2888 pinfo = dma_alloc_coherent(&adapter->pdev->dev, sizeof(mraid_pinfo_t), 2889 &pinfo_dma_h, GFP_KERNEL); 2890 if (pinfo == NULL) { 2891 con_log(CL_ANN, (KERN_WARNING 2892 "megaraid: out of memory, %s %d\n", __func__, 2893 __LINE__)); 2894 2895 return -1; 2896 } 2897 2898 mbox->xferaddr = (uint32_t)adapter->ibuf_dma_h; 2899 memset((void *)adapter->ibuf, 0, MBOX_IBUF_SIZE); 2900 2901 raw_mbox[0] = FC_NEW_CONFIG; 2902 raw_mbox[2] = NC_SUBOP_ENQUIRY3; 2903 raw_mbox[3] = ENQ3_GET_SOLICITED_FULL; 2904 2905 // Issue the command 2906 if (mbox_post_sync_cmd(adapter, raw_mbox) != 0) { 2907 2908 con_log(CL_ANN, (KERN_WARNING "megaraid: Inquiry3 failed\n")); 2909 2910 dma_free_coherent(&adapter->pdev->dev, sizeof(mraid_pinfo_t), 2911 pinfo, pinfo_dma_h); 2912 2913 return -1; 2914 } 2915 2916 /* 2917 * Collect information about state of each physical drive 2918 * attached to the controller. We will expose all the disks 2919 * which are not part of RAID 2920 */ 2921 mraid_inq3 = (mraid_inquiry3_t *)adapter->ibuf; 2922 for (i = 0; i < MBOX_MAX_PHYSICAL_DRIVES; i++) { 2923 raid_dev->pdrv_state[i] = mraid_inq3->pdrv_state[i]; 2924 } 2925 2926 /* 2927 * Get product info for information like number of channels, 2928 * maximum commands supported. 2929 */ 2930 memset((caddr_t)raw_mbox, 0, sizeof(raw_mbox)); 2931 mbox->xferaddr = (uint32_t)pinfo_dma_h; 2932 2933 raw_mbox[0] = FC_NEW_CONFIG; 2934 raw_mbox[2] = NC_SUBOP_PRODUCT_INFO; 2935 2936 if (mbox_post_sync_cmd(adapter, raw_mbox) != 0) { 2937 2938 con_log(CL_ANN, (KERN_WARNING 2939 "megaraid: product info failed\n")); 2940 2941 dma_free_coherent(&adapter->pdev->dev, sizeof(mraid_pinfo_t), 2942 pinfo, pinfo_dma_h); 2943 2944 return -1; 2945 } 2946 2947 /* 2948 * Setup some parameters for host, as required by our caller 2949 */ 2950 adapter->max_channel = pinfo->nchannels; 2951 2952 /* 2953 * we will export all the logical drives on a single channel. 2954 * Add 1 since inquires do not come for inititor ID 2955 */ 2956 adapter->max_target = MAX_LOGICAL_DRIVES_40LD + 1; 2957 adapter->max_lun = 8; // up to 8 LUNs for non-disk devices 2958 2959 /* 2960 * These are the maximum outstanding commands for the scsi-layer 2961 */ 2962 adapter->max_cmds = MBOX_MAX_SCSI_CMDS; 2963 2964 memset(adapter->fw_version, 0, VERSION_SIZE); 2965 memset(adapter->bios_version, 0, VERSION_SIZE); 2966 2967 memcpy(adapter->fw_version, pinfo->fw_version, 4); 2968 adapter->fw_version[4] = 0; 2969 2970 memcpy(adapter->bios_version, pinfo->bios_version, 4); 2971 adapter->bios_version[4] = 0; 2972 2973 con_log(CL_ANN, (KERN_NOTICE 2974 "megaraid: fw version:[%s] bios version:[%s]\n", 2975 adapter->fw_version, adapter->bios_version)); 2976 2977 dma_free_coherent(&adapter->pdev->dev, sizeof(mraid_pinfo_t), pinfo, 2978 pinfo_dma_h); 2979 2980 return 0; 2981 } 2982 2983 2984 2985 /** 2986 * megaraid_mbox_extended_cdb - check for support for extended CDBs 2987 * @adapter : soft state for the controller 2988 * 2989 * This routine check whether the controller in question supports extended 2990 * ( > 10 bytes ) CDBs. 2991 */ 2992 static int 2993 megaraid_mbox_extended_cdb(adapter_t *adapter) 2994 { 2995 mbox_t *mbox; 2996 uint8_t raw_mbox[sizeof(mbox_t)]; 2997 int rval; 2998 2999 mbox = (mbox_t *)raw_mbox; 3000 3001 memset((caddr_t)raw_mbox, 0, sizeof(raw_mbox)); 3002 mbox->xferaddr = (uint32_t)adapter->ibuf_dma_h; 3003 3004 memset((void *)adapter->ibuf, 0, MBOX_IBUF_SIZE); 3005 3006 raw_mbox[0] = MAIN_MISC_OPCODE; 3007 raw_mbox[2] = SUPPORT_EXT_CDB; 3008 3009 /* 3010 * Issue the command 3011 */ 3012 rval = 0; 3013 if (mbox_post_sync_cmd(adapter, raw_mbox) != 0) { 3014 rval = -1; 3015 } 3016 3017 return rval; 3018 } 3019 3020 3021 /** 3022 * megaraid_mbox_support_ha - Do we support clustering 3023 * @adapter : soft state for the controller 3024 * @init_id : ID of the initiator 3025 * 3026 * Determine if the firmware supports clustering and the ID of the initiator. 3027 */ 3028 static int 3029 megaraid_mbox_support_ha(adapter_t *adapter, uint16_t *init_id) 3030 { 3031 mbox_t *mbox; 3032 uint8_t raw_mbox[sizeof(mbox_t)]; 3033 int rval; 3034 3035 3036 mbox = (mbox_t *)raw_mbox; 3037 3038 memset((caddr_t)raw_mbox, 0, sizeof(raw_mbox)); 3039 3040 mbox->xferaddr = (uint32_t)adapter->ibuf_dma_h; 3041 3042 memset((void *)adapter->ibuf, 0, MBOX_IBUF_SIZE); 3043 3044 raw_mbox[0] = GET_TARGET_ID; 3045 3046 // Issue the command 3047 *init_id = 7; 3048 rval = -1; 3049 if (mbox_post_sync_cmd(adapter, raw_mbox) == 0) { 3050 3051 *init_id = *(uint8_t *)adapter->ibuf; 3052 3053 con_log(CL_ANN, (KERN_INFO 3054 "megaraid: cluster firmware, initiator ID: %d\n", 3055 *init_id)); 3056 3057 rval = 0; 3058 } 3059 3060 return rval; 3061 } 3062 3063 3064 /** 3065 * megaraid_mbox_support_random_del - Do we support random deletion 3066 * @adapter : soft state for the controller 3067 * 3068 * Determine if the firmware supports random deletion. 3069 * Return: 1 is operation supported, 0 otherwise 3070 */ 3071 static int 3072 megaraid_mbox_support_random_del(adapter_t *adapter) 3073 { 3074 uint8_t raw_mbox[sizeof(mbox_t)]; 3075 int rval; 3076 3077 /* 3078 * Newer firmware on Dell CERC expect a different 3079 * random deletion handling, so disable it. 3080 */ 3081 if (adapter->pdev->vendor == PCI_VENDOR_ID_AMI && 3082 adapter->pdev->device == PCI_DEVICE_ID_AMI_MEGARAID3 && 3083 adapter->pdev->subsystem_vendor == PCI_VENDOR_ID_DELL && 3084 adapter->pdev->subsystem_device == PCI_SUBSYS_ID_CERC_ATA100_4CH && 3085 (adapter->fw_version[0] > '6' || 3086 (adapter->fw_version[0] == '6' && 3087 adapter->fw_version[2] > '6') || 3088 (adapter->fw_version[0] == '6' 3089 && adapter->fw_version[2] == '6' 3090 && adapter->fw_version[3] > '1'))) { 3091 con_log(CL_DLEVEL1, ("megaraid: disable random deletion\n")); 3092 return 0; 3093 } 3094 3095 memset((caddr_t)raw_mbox, 0, sizeof(mbox_t)); 3096 3097 raw_mbox[0] = FC_DEL_LOGDRV; 3098 raw_mbox[2] = OP_SUP_DEL_LOGDRV; 3099 3100 // Issue the command 3101 rval = 0; 3102 if (mbox_post_sync_cmd(adapter, raw_mbox) == 0) { 3103 3104 con_log(CL_DLEVEL1, ("megaraid: supports random deletion\n")); 3105 3106 rval = 1; 3107 } 3108 3109 return rval; 3110 } 3111 3112 3113 /** 3114 * megaraid_mbox_get_max_sg - maximum sg elements supported by the firmware 3115 * @adapter : soft state for the controller 3116 * 3117 * Find out the maximum number of scatter-gather elements supported by the 3118 * firmware. 3119 */ 3120 static int 3121 megaraid_mbox_get_max_sg(adapter_t *adapter) 3122 { 3123 mbox_t *mbox; 3124 uint8_t raw_mbox[sizeof(mbox_t)]; 3125 int nsg; 3126 3127 3128 mbox = (mbox_t *)raw_mbox; 3129 3130 memset((caddr_t)raw_mbox, 0, sizeof(mbox_t)); 3131 3132 mbox->xferaddr = (uint32_t)adapter->ibuf_dma_h; 3133 3134 memset((void *)adapter->ibuf, 0, MBOX_IBUF_SIZE); 3135 3136 raw_mbox[0] = MAIN_MISC_OPCODE; 3137 raw_mbox[2] = GET_MAX_SG_SUPPORT; 3138 3139 // Issue the command 3140 if (mbox_post_sync_cmd(adapter, raw_mbox) == 0) { 3141 nsg = *(uint8_t *)adapter->ibuf; 3142 } 3143 else { 3144 nsg = MBOX_DEFAULT_SG_SIZE; 3145 } 3146 3147 if (nsg > MBOX_MAX_SG_SIZE) nsg = MBOX_MAX_SG_SIZE; 3148 3149 return nsg; 3150 } 3151 3152 3153 /** 3154 * megaraid_mbox_enum_raid_scsi - enumerate the RAID and SCSI channels 3155 * @adapter : soft state for the controller 3156 * 3157 * Enumerate the RAID and SCSI channels for ROMB platforms so that channels 3158 * can be exported as regular SCSI channels. 3159 */ 3160 static void 3161 megaraid_mbox_enum_raid_scsi(adapter_t *adapter) 3162 { 3163 mraid_device_t *raid_dev = ADAP2RAIDDEV(adapter); 3164 mbox_t *mbox; 3165 uint8_t raw_mbox[sizeof(mbox_t)]; 3166 3167 3168 mbox = (mbox_t *)raw_mbox; 3169 3170 memset((caddr_t)raw_mbox, 0, sizeof(mbox_t)); 3171 3172 mbox->xferaddr = (uint32_t)adapter->ibuf_dma_h; 3173 3174 memset((void *)adapter->ibuf, 0, MBOX_IBUF_SIZE); 3175 3176 raw_mbox[0] = CHNL_CLASS; 3177 raw_mbox[2] = GET_CHNL_CLASS; 3178 3179 // Issue the command. If the command fails, all channels are RAID 3180 // channels 3181 raid_dev->channel_class = 0xFF; 3182 if (mbox_post_sync_cmd(adapter, raw_mbox) == 0) { 3183 raid_dev->channel_class = *(uint8_t *)adapter->ibuf; 3184 } 3185 3186 return; 3187 } 3188 3189 3190 /** 3191 * megaraid_mbox_flush_cache - flush adapter and disks cache 3192 * @adapter : soft state for the controller 3193 * 3194 * Flush adapter cache followed by disks cache. 3195 */ 3196 static void 3197 megaraid_mbox_flush_cache(adapter_t *adapter) 3198 { 3199 uint8_t raw_mbox[sizeof(mbox_t)]; 3200 3201 memset((caddr_t)raw_mbox, 0, sizeof(mbox_t)); 3202 3203 raw_mbox[0] = FLUSH_ADAPTER; 3204 3205 if (mbox_post_sync_cmd(adapter, raw_mbox) != 0) { 3206 con_log(CL_ANN, ("megaraid: flush adapter failed\n")); 3207 } 3208 3209 raw_mbox[0] = FLUSH_SYSTEM; 3210 3211 if (mbox_post_sync_cmd(adapter, raw_mbox) != 0) { 3212 con_log(CL_ANN, ("megaraid: flush disks cache failed\n")); 3213 } 3214 3215 return; 3216 } 3217 3218 3219 /** 3220 * megaraid_mbox_fire_sync_cmd - fire the sync cmd 3221 * @adapter : soft state for the controller 3222 * 3223 * Clears the pending cmds in FW and reinits its RAID structs. 3224 */ 3225 static int 3226 megaraid_mbox_fire_sync_cmd(adapter_t *adapter) 3227 { 3228 mbox_t *mbox; 3229 uint8_t raw_mbox[sizeof(mbox_t)]; 3230 mraid_device_t *raid_dev = ADAP2RAIDDEV(adapter); 3231 int status = 0; 3232 int i; 3233 uint32_t dword; 3234 3235 memset((caddr_t)raw_mbox, 0, sizeof(mbox_t)); 3236 3237 raw_mbox[0] = 0xFF; 3238 3239 mbox = raid_dev->mbox; 3240 3241 /* Wait until mailbox is free */ 3242 if (megaraid_busywait_mbox(raid_dev) != 0) { 3243 status = 1; 3244 goto blocked_mailbox; 3245 } 3246 3247 /* Copy mailbox data into host structure */ 3248 memcpy((caddr_t)mbox, (caddr_t)raw_mbox, 16); 3249 mbox->cmdid = 0xFE; 3250 mbox->busy = 1; 3251 mbox->poll = 0; 3252 mbox->ack = 0; 3253 mbox->numstatus = 0; 3254 mbox->status = 0; 3255 3256 wmb(); 3257 WRINDOOR(raid_dev, raid_dev->mbox_dma | 0x1); 3258 3259 /* Wait for maximum 1 min for status to post. 3260 * If the Firmware SUPPORTS the ABOVE COMMAND, 3261 * mbox->cmd will be set to 0 3262 * else 3263 * the firmware will reject the command with 3264 * mbox->numstatus set to 1 3265 */ 3266 3267 i = 0; 3268 status = 0; 3269 while (!mbox->numstatus && mbox->cmd == 0xFF) { 3270 rmb(); 3271 msleep(1); 3272 i++; 3273 if (i > 1000 * 60) { 3274 status = 1; 3275 break; 3276 } 3277 } 3278 if (mbox->numstatus == 1) 3279 status = 1; /*cmd not supported*/ 3280 3281 /* Check for interrupt line */ 3282 dword = RDOUTDOOR(raid_dev); 3283 WROUTDOOR(raid_dev, dword); 3284 WRINDOOR(raid_dev,2); 3285 3286 return status; 3287 3288 blocked_mailbox: 3289 con_log(CL_ANN, (KERN_WARNING "megaraid: blocked mailbox\n")); 3290 return status; 3291 } 3292 3293 /** 3294 * megaraid_mbox_display_scb - display SCB information, mostly debug purposes 3295 * @adapter : controller's soft state 3296 * @scb : SCB to be displayed 3297 * 3298 * Diplay information about the given SCB iff the current debug level is 3299 * verbose. 3300 */ 3301 static void 3302 megaraid_mbox_display_scb(adapter_t *adapter, scb_t *scb) 3303 { 3304 mbox_ccb_t *ccb; 3305 struct scsi_cmnd *scp; 3306 mbox_t *mbox; 3307 int level; 3308 int i; 3309 3310 3311 ccb = (mbox_ccb_t *)scb->ccb; 3312 scp = scb->scp; 3313 mbox = ccb->mbox; 3314 3315 level = CL_DLEVEL3; 3316 3317 con_log(level, (KERN_NOTICE 3318 "megaraid mailbox: status:%#x cmd:%#x id:%#x ", scb->status, 3319 mbox->cmd, scb->sno)); 3320 3321 con_log(level, ("sec:%#x lba:%#x addr:%#x ld:%d sg:%d\n", 3322 mbox->numsectors, mbox->lba, mbox->xferaddr, mbox->logdrv, 3323 mbox->numsge)); 3324 3325 if (!scp) return; 3326 3327 con_log(level, (KERN_NOTICE "scsi cmnd: ")); 3328 3329 for (i = 0; i < scp->cmd_len; i++) { 3330 con_log(level, ("%#2.02x ", scp->cmnd[i])); 3331 } 3332 3333 con_log(level, ("\n")); 3334 3335 return; 3336 } 3337 3338 3339 /** 3340 * megaraid_mbox_setup_device_map - manage device ids 3341 * @adapter : Driver's soft state 3342 * 3343 * Manage the device ids to have an appropriate mapping between the kernel 3344 * scsi addresses and megaraid scsi and logical drive addresses. We export 3345 * scsi devices on their actual addresses, whereas the logical drives are 3346 * exported on a virtual scsi channel. 3347 */ 3348 static void 3349 megaraid_mbox_setup_device_map(adapter_t *adapter) 3350 { 3351 uint8_t c; 3352 uint8_t t; 3353 3354 /* 3355 * First fill the values on the logical drive channel 3356 */ 3357 for (t = 0; t < LSI_MAX_LOGICAL_DRIVES_64LD; t++) 3358 adapter->device_ids[adapter->max_channel][t] = 3359 (t < adapter->init_id) ? t : t - 1; 3360 3361 adapter->device_ids[adapter->max_channel][adapter->init_id] = 0xFF; 3362 3363 /* 3364 * Fill the values on the physical devices channels 3365 */ 3366 for (c = 0; c < adapter->max_channel; c++) 3367 for (t = 0; t < LSI_MAX_LOGICAL_DRIVES_64LD; t++) 3368 adapter->device_ids[c][t] = (c << 8) | t; 3369 } 3370 3371 3372 /* 3373 * END: internal commands library 3374 */ 3375 3376 /* 3377 * START: Interface for the common management module 3378 * 3379 * This is the module, which interfaces with the common management module to 3380 * provide support for ioctl and sysfs 3381 */ 3382 3383 /** 3384 * megaraid_cmm_register - register with the management module 3385 * @adapter : HBA soft state 3386 * 3387 * Register with the management module, which allows applications to issue 3388 * ioctl calls to the drivers. This interface is used by the management module 3389 * to setup sysfs support as well. 3390 */ 3391 static int 3392 megaraid_cmm_register(adapter_t *adapter) 3393 { 3394 mraid_device_t *raid_dev = ADAP2RAIDDEV(adapter); 3395 mraid_mmadp_t adp; 3396 scb_t *scb; 3397 mbox_ccb_t *ccb; 3398 int rval; 3399 int i; 3400 3401 // Allocate memory for the base list of scb for management module. 3402 adapter->uscb_list = kcalloc(MBOX_MAX_USER_CMDS, sizeof(scb_t), GFP_KERNEL); 3403 3404 if (adapter->uscb_list == NULL) { 3405 con_log(CL_ANN, (KERN_WARNING 3406 "megaraid: out of memory, %s %d\n", __func__, 3407 __LINE__)); 3408 return -1; 3409 } 3410 3411 3412 // Initialize the synchronization parameters for resources for 3413 // commands for management module 3414 INIT_LIST_HEAD(&adapter->uscb_pool); 3415 3416 spin_lock_init(USER_FREE_LIST_LOCK(adapter)); 3417 3418 3419 3420 // link all the packets. Note, CCB for commands, coming from the 3421 // commom management module, mailbox physical address are already 3422 // setup by it. We just need placeholder for that in our local command 3423 // control blocks 3424 for (i = 0; i < MBOX_MAX_USER_CMDS; i++) { 3425 3426 scb = adapter->uscb_list + i; 3427 ccb = raid_dev->uccb_list + i; 3428 3429 scb->ccb = (caddr_t)ccb; 3430 ccb->mbox64 = raid_dev->umbox64 + i; 3431 ccb->mbox = &ccb->mbox64->mbox32; 3432 ccb->raw_mbox = (uint8_t *)ccb->mbox; 3433 3434 scb->gp = 0; 3435 3436 // COMMAND ID 0 - (MBOX_MAX_SCSI_CMDS-1) ARE RESERVED FOR 3437 // COMMANDS COMING FROM IO SUBSYSTEM (MID-LAYER) 3438 scb->sno = i + MBOX_MAX_SCSI_CMDS; 3439 3440 scb->scp = NULL; 3441 scb->state = SCB_FREE; 3442 scb->dma_direction = DMA_NONE; 3443 scb->dma_type = MRAID_DMA_NONE; 3444 scb->dev_channel = -1; 3445 scb->dev_target = -1; 3446 3447 // put scb in the free pool 3448 list_add_tail(&scb->list, &adapter->uscb_pool); 3449 } 3450 3451 adp.unique_id = adapter->unique_id; 3452 adp.drvr_type = DRVRTYPE_MBOX; 3453 adp.drvr_data = (unsigned long)adapter; 3454 adp.pdev = adapter->pdev; 3455 adp.issue_uioc = megaraid_mbox_mm_handler; 3456 adp.timeout = MBOX_RESET_WAIT + MBOX_RESET_EXT_WAIT; 3457 adp.max_kioc = MBOX_MAX_USER_CMDS; 3458 3459 if ((rval = mraid_mm_register_adp(&adp)) != 0) { 3460 3461 con_log(CL_ANN, (KERN_WARNING 3462 "megaraid mbox: did not register with CMM\n")); 3463 3464 kfree(adapter->uscb_list); 3465 } 3466 3467 return rval; 3468 } 3469 3470 3471 /** 3472 * megaraid_cmm_unregister - un-register with the management module 3473 * @adapter : HBA soft state 3474 * 3475 * Un-register with the management module. 3476 * FIXME: mgmt module must return failure for unregister if it has pending 3477 * commands in LLD. 3478 */ 3479 static int 3480 megaraid_cmm_unregister(adapter_t *adapter) 3481 { 3482 kfree(adapter->uscb_list); 3483 mraid_mm_unregister_adp(adapter->unique_id); 3484 return 0; 3485 } 3486 3487 3488 /** 3489 * megaraid_mbox_mm_handler - interface for CMM to issue commands to LLD 3490 * @drvr_data : LLD specific data 3491 * @kioc : CMM interface packet 3492 * @action : command action 3493 * 3494 * This routine is invoked whenever the Common Management Module (CMM) has a 3495 * command for us. The 'action' parameter specifies if this is a new command 3496 * or otherwise. 3497 */ 3498 static int 3499 megaraid_mbox_mm_handler(unsigned long drvr_data, uioc_t *kioc, uint32_t action) 3500 { 3501 adapter_t *adapter; 3502 3503 if (action != IOCTL_ISSUE) { 3504 con_log(CL_ANN, (KERN_WARNING 3505 "megaraid: unsupported management action:%#2x\n", 3506 action)); 3507 return (-ENOTSUPP); 3508 } 3509 3510 adapter = (adapter_t *)drvr_data; 3511 3512 // make sure this adapter is not being detached right now. 3513 if (atomic_read(&adapter->being_detached)) { 3514 con_log(CL_ANN, (KERN_WARNING 3515 "megaraid: reject management request, detaching\n")); 3516 return (-ENODEV); 3517 } 3518 3519 switch (kioc->opcode) { 3520 3521 case GET_ADAP_INFO: 3522 3523 kioc->status = gather_hbainfo(adapter, (mraid_hba_info_t *) 3524 (unsigned long)kioc->buf_vaddr); 3525 3526 kioc->done(kioc); 3527 3528 return kioc->status; 3529 3530 case MBOX_CMD: 3531 3532 return megaraid_mbox_mm_command(adapter, kioc); 3533 3534 default: 3535 kioc->status = (-EINVAL); 3536 kioc->done(kioc); 3537 return (-EINVAL); 3538 } 3539 3540 return 0; // not reached 3541 } 3542 3543 /** 3544 * megaraid_mbox_mm_command - issues commands routed through CMM 3545 * @adapter : HBA soft state 3546 * @kioc : management command packet 3547 * 3548 * Issues commands, which are routed through the management module. 3549 */ 3550 static int 3551 megaraid_mbox_mm_command(adapter_t *adapter, uioc_t *kioc) 3552 { 3553 struct list_head *head = &adapter->uscb_pool; 3554 mbox64_t *mbox64; 3555 uint8_t *raw_mbox; 3556 scb_t *scb; 3557 mbox_ccb_t *ccb; 3558 unsigned long flags; 3559 3560 // detach one scb from free pool 3561 spin_lock_irqsave(USER_FREE_LIST_LOCK(adapter), flags); 3562 3563 if (list_empty(head)) { // should never happen because of CMM 3564 3565 con_log(CL_ANN, (KERN_WARNING 3566 "megaraid mbox: bug in cmm handler, lost resources\n")); 3567 3568 spin_unlock_irqrestore(USER_FREE_LIST_LOCK(adapter), flags); 3569 3570 return (-EINVAL); 3571 } 3572 3573 scb = list_entry(head->next, scb_t, list); 3574 list_del_init(&scb->list); 3575 3576 spin_unlock_irqrestore(USER_FREE_LIST_LOCK(adapter), flags); 3577 3578 scb->state = SCB_ACTIVE; 3579 scb->dma_type = MRAID_DMA_NONE; 3580 scb->dma_direction = DMA_NONE; 3581 3582 ccb = (mbox_ccb_t *)scb->ccb; 3583 mbox64 = (mbox64_t *)(unsigned long)kioc->cmdbuf; 3584 raw_mbox = (uint8_t *)&mbox64->mbox32; 3585 3586 memcpy(ccb->mbox64, mbox64, sizeof(mbox64_t)); 3587 3588 scb->gp = (unsigned long)kioc; 3589 3590 /* 3591 * If it is a logdrv random delete operation, we have to wait till 3592 * there are no outstanding cmds at the fw and then issue it directly 3593 */ 3594 if (raw_mbox[0] == FC_DEL_LOGDRV && raw_mbox[2] == OP_DEL_LOGDRV) { 3595 3596 if (wait_till_fw_empty(adapter)) { 3597 con_log(CL_ANN, (KERN_NOTICE 3598 "megaraid mbox: LD delete, timed out\n")); 3599 3600 kioc->status = -ETIME; 3601 3602 scb->status = -1; 3603 3604 megaraid_mbox_mm_done(adapter, scb); 3605 3606 return (-ETIME); 3607 } 3608 3609 INIT_LIST_HEAD(&scb->list); 3610 3611 scb->state = SCB_ISSUED; 3612 if (mbox_post_cmd(adapter, scb) != 0) { 3613 3614 con_log(CL_ANN, (KERN_NOTICE 3615 "megaraid mbox: LD delete, mailbox busy\n")); 3616 3617 kioc->status = -EBUSY; 3618 3619 scb->status = -1; 3620 3621 megaraid_mbox_mm_done(adapter, scb); 3622 3623 return (-EBUSY); 3624 } 3625 3626 return 0; 3627 } 3628 3629 // put the command on the pending list and execute 3630 megaraid_mbox_runpendq(adapter, scb); 3631 3632 return 0; 3633 } 3634 3635 3636 static int 3637 wait_till_fw_empty(adapter_t *adapter) 3638 { 3639 unsigned long flags = 0; 3640 int i; 3641 3642 3643 /* 3644 * Set the quiescent flag to stop issuing cmds to FW. 3645 */ 3646 spin_lock_irqsave(&adapter->lock, flags); 3647 adapter->quiescent++; 3648 spin_unlock_irqrestore(&adapter->lock, flags); 3649 3650 /* 3651 * Wait till there are no more cmds outstanding at FW. Try for at most 3652 * 60 seconds 3653 */ 3654 for (i = 0; i < 60 && adapter->outstanding_cmds; i++) { 3655 con_log(CL_DLEVEL1, (KERN_INFO 3656 "megaraid: FW has %d pending commands\n", 3657 adapter->outstanding_cmds)); 3658 3659 msleep(1000); 3660 } 3661 3662 return adapter->outstanding_cmds; 3663 } 3664 3665 3666 /** 3667 * megaraid_mbox_mm_done - callback for CMM commands 3668 * @adapter : HBA soft state 3669 * @scb : completed command 3670 * 3671 * Callback routine for internal commands originated from the management 3672 * module. 3673 */ 3674 static void 3675 megaraid_mbox_mm_done(adapter_t *adapter, scb_t *scb) 3676 { 3677 uioc_t *kioc; 3678 mbox64_t *mbox64; 3679 uint8_t *raw_mbox; 3680 unsigned long flags; 3681 3682 kioc = (uioc_t *)scb->gp; 3683 mbox64 = (mbox64_t *)(unsigned long)kioc->cmdbuf; 3684 mbox64->mbox32.status = scb->status; 3685 raw_mbox = (uint8_t *)&mbox64->mbox32; 3686 3687 3688 // put scb in the free pool 3689 scb->state = SCB_FREE; 3690 scb->scp = NULL; 3691 3692 spin_lock_irqsave(USER_FREE_LIST_LOCK(adapter), flags); 3693 3694 list_add(&scb->list, &adapter->uscb_pool); 3695 3696 spin_unlock_irqrestore(USER_FREE_LIST_LOCK(adapter), flags); 3697 3698 // if a delete logical drive operation succeeded, restart the 3699 // controller 3700 if (raw_mbox[0] == FC_DEL_LOGDRV && raw_mbox[2] == OP_DEL_LOGDRV) { 3701 3702 adapter->quiescent--; 3703 3704 megaraid_mbox_runpendq(adapter, NULL); 3705 } 3706 3707 kioc->done(kioc); 3708 3709 return; 3710 } 3711 3712 3713 /** 3714 * gather_hbainfo - HBA characteristics for the applications 3715 * @adapter : HBA soft state 3716 * @hinfo : pointer to the caller's host info strucuture 3717 */ 3718 static int 3719 gather_hbainfo(adapter_t *adapter, mraid_hba_info_t *hinfo) 3720 { 3721 hinfo->pci_vendor_id = adapter->pdev->vendor; 3722 hinfo->pci_device_id = adapter->pdev->device; 3723 hinfo->subsys_vendor_id = adapter->pdev->subsystem_vendor; 3724 hinfo->subsys_device_id = adapter->pdev->subsystem_device; 3725 3726 hinfo->pci_bus = adapter->pdev->bus->number; 3727 hinfo->pci_dev_fn = adapter->pdev->devfn; 3728 hinfo->pci_slot = PCI_SLOT(adapter->pdev->devfn); 3729 hinfo->irq = adapter->host->irq; 3730 hinfo->baseport = ADAP2RAIDDEV(adapter)->baseport; 3731 3732 hinfo->unique_id = (hinfo->pci_bus << 8) | adapter->pdev->devfn; 3733 hinfo->host_no = adapter->host->host_no; 3734 3735 return 0; 3736 } 3737 3738 /* 3739 * END: Interface for the common management module 3740 */ 3741 3742 3743 3744 /** 3745 * megaraid_sysfs_alloc_resources - allocate sysfs related resources 3746 * @adapter : controller's soft state 3747 * 3748 * Allocate packets required to issue FW calls whenever the sysfs attributes 3749 * are read. These attributes would require up-to-date information from the 3750 * FW. Also set up resources for mutual exclusion to share these resources and 3751 * the wait queue. 3752 * 3753 * Return 0 on success. 3754 * Return -ERROR_CODE on failure. 3755 */ 3756 static int 3757 megaraid_sysfs_alloc_resources(adapter_t *adapter) 3758 { 3759 mraid_device_t *raid_dev = ADAP2RAIDDEV(adapter); 3760 int rval = 0; 3761 3762 raid_dev->sysfs_uioc = kmalloc(sizeof(uioc_t), GFP_KERNEL); 3763 3764 raid_dev->sysfs_mbox64 = kmalloc(sizeof(mbox64_t), GFP_KERNEL); 3765 3766 raid_dev->sysfs_buffer = dma_alloc_coherent(&adapter->pdev->dev, 3767 PAGE_SIZE, &raid_dev->sysfs_buffer_dma, GFP_KERNEL); 3768 3769 if (!raid_dev->sysfs_uioc || !raid_dev->sysfs_mbox64 || 3770 !raid_dev->sysfs_buffer) { 3771 3772 con_log(CL_ANN, (KERN_WARNING 3773 "megaraid: out of memory, %s %d\n", __func__, 3774 __LINE__)); 3775 3776 rval = -ENOMEM; 3777 3778 megaraid_sysfs_free_resources(adapter); 3779 } 3780 3781 mutex_init(&raid_dev->sysfs_mtx); 3782 3783 init_waitqueue_head(&raid_dev->sysfs_wait_q); 3784 3785 return rval; 3786 } 3787 3788 3789 /** 3790 * megaraid_sysfs_free_resources - free sysfs related resources 3791 * @adapter : controller's soft state 3792 * 3793 * Free packets allocated for sysfs FW commands 3794 */ 3795 static void 3796 megaraid_sysfs_free_resources(adapter_t *adapter) 3797 { 3798 mraid_device_t *raid_dev = ADAP2RAIDDEV(adapter); 3799 3800 kfree(raid_dev->sysfs_uioc); 3801 kfree(raid_dev->sysfs_mbox64); 3802 3803 if (raid_dev->sysfs_buffer) { 3804 dma_free_coherent(&adapter->pdev->dev, PAGE_SIZE, 3805 raid_dev->sysfs_buffer, raid_dev->sysfs_buffer_dma); 3806 } 3807 } 3808 3809 3810 /** 3811 * megaraid_sysfs_get_ldmap_done - callback for get ldmap 3812 * @uioc : completed packet 3813 * 3814 * Callback routine called in the ISR/tasklet context for get ldmap call 3815 */ 3816 static void 3817 megaraid_sysfs_get_ldmap_done(uioc_t *uioc) 3818 { 3819 adapter_t *adapter = (adapter_t *)uioc->buf_vaddr; 3820 mraid_device_t *raid_dev = ADAP2RAIDDEV(adapter); 3821 3822 uioc->status = 0; 3823 3824 wake_up(&raid_dev->sysfs_wait_q); 3825 } 3826 3827 /** 3828 * megaraid_sysfs_get_ldmap_timeout - timeout handling for get ldmap 3829 * @t : timed out timer 3830 * 3831 * Timeout routine to recover and return to application, in case the adapter 3832 * has stopped responding. A timeout of 60 seconds for this command seems like 3833 * a good value. 3834 */ 3835 static void 3836 megaraid_sysfs_get_ldmap_timeout(struct timer_list *t) 3837 { 3838 struct uioc_timeout *timeout = from_timer(timeout, t, timer); 3839 uioc_t *uioc = timeout->uioc; 3840 adapter_t *adapter = (adapter_t *)uioc->buf_vaddr; 3841 mraid_device_t *raid_dev = ADAP2RAIDDEV(adapter); 3842 3843 uioc->status = -ETIME; 3844 3845 wake_up(&raid_dev->sysfs_wait_q); 3846 } 3847 3848 3849 /** 3850 * megaraid_sysfs_get_ldmap - get update logical drive map 3851 * @adapter : controller's soft state 3852 * 3853 * This routine will be called whenever user reads the logical drive 3854 * attributes, go get the current logical drive mapping table from the 3855 * firmware. We use the management API's to issue commands to the controller. 3856 * 3857 * NOTE: The commands issuance functionality is not generalized and 3858 * implemented in context of "get ld map" command only. If required, the 3859 * command issuance logical can be trivially pulled out and implemented as a 3860 * standalone library. For now, this should suffice since there is no other 3861 * user of this interface. 3862 * 3863 * Return 0 on success. 3864 * Return -1 on failure. 3865 */ 3866 static int 3867 megaraid_sysfs_get_ldmap(adapter_t *adapter) 3868 { 3869 mraid_device_t *raid_dev = ADAP2RAIDDEV(adapter); 3870 uioc_t *uioc; 3871 mbox64_t *mbox64; 3872 mbox_t *mbox; 3873 char *raw_mbox; 3874 struct uioc_timeout timeout; 3875 caddr_t ldmap; 3876 int rval = 0; 3877 3878 /* 3879 * Allow only one read at a time to go through the sysfs attributes 3880 */ 3881 mutex_lock(&raid_dev->sysfs_mtx); 3882 3883 uioc = raid_dev->sysfs_uioc; 3884 mbox64 = raid_dev->sysfs_mbox64; 3885 ldmap = raid_dev->sysfs_buffer; 3886 3887 memset(uioc, 0, sizeof(uioc_t)); 3888 memset(mbox64, 0, sizeof(mbox64_t)); 3889 memset(ldmap, 0, sizeof(raid_dev->curr_ldmap)); 3890 3891 mbox = &mbox64->mbox32; 3892 raw_mbox = (char *)mbox; 3893 uioc->cmdbuf = (uint64_t)(unsigned long)mbox64; 3894 uioc->buf_vaddr = (caddr_t)adapter; 3895 uioc->status = -ENODATA; 3896 uioc->done = megaraid_sysfs_get_ldmap_done; 3897 3898 /* 3899 * Prepare the mailbox packet to get the current logical drive mapping 3900 * table 3901 */ 3902 mbox->xferaddr = (uint32_t)raid_dev->sysfs_buffer_dma; 3903 3904 raw_mbox[0] = FC_DEL_LOGDRV; 3905 raw_mbox[2] = OP_GET_LDID_MAP; 3906 3907 /* 3908 * Setup a timer to recover from a non-responding controller 3909 */ 3910 timeout.uioc = uioc; 3911 timer_setup_on_stack(&timeout.timer, 3912 megaraid_sysfs_get_ldmap_timeout, 0); 3913 3914 timeout.timer.expires = jiffies + 60 * HZ; 3915 add_timer(&timeout.timer); 3916 3917 /* 3918 * Send the command to the firmware 3919 */ 3920 rval = megaraid_mbox_mm_command(adapter, uioc); 3921 3922 if (rval == 0) { // command successfully issued 3923 wait_event(raid_dev->sysfs_wait_q, (uioc->status != -ENODATA)); 3924 3925 /* 3926 * Check if the command timed out 3927 */ 3928 if (uioc->status == -ETIME) { 3929 con_log(CL_ANN, (KERN_NOTICE 3930 "megaraid: sysfs get ld map timed out\n")); 3931 3932 rval = -ETIME; 3933 } 3934 else { 3935 rval = mbox->status; 3936 } 3937 3938 if (rval == 0) { 3939 memcpy(raid_dev->curr_ldmap, ldmap, 3940 sizeof(raid_dev->curr_ldmap)); 3941 } 3942 else { 3943 con_log(CL_ANN, (KERN_NOTICE 3944 "megaraid: get ld map failed with %x\n", rval)); 3945 } 3946 } 3947 else { 3948 con_log(CL_ANN, (KERN_NOTICE 3949 "megaraid: could not issue ldmap command:%x\n", rval)); 3950 } 3951 3952 3953 del_timer_sync(&timeout.timer); 3954 destroy_timer_on_stack(&timeout.timer); 3955 3956 mutex_unlock(&raid_dev->sysfs_mtx); 3957 3958 return rval; 3959 } 3960 3961 3962 /** 3963 * megaraid_mbox_app_hndl_show - display application handle for this adapter 3964 * @dev : class device object representation for the host 3965 * @attr : device attribute (unused) 3966 * @buf : buffer to send data to 3967 * 3968 * Display the handle used by the applications while executing management 3969 * tasks on the adapter. We invoke a management module API to get the adapter 3970 * handle, since we do not interface with applications directly. 3971 */ 3972 static ssize_t 3973 megaraid_mbox_app_hndl_show(struct device *dev, struct device_attribute *attr, char *buf) 3974 { 3975 struct Scsi_Host *shost = class_to_shost(dev); 3976 adapter_t *adapter = (adapter_t *)SCSIHOST2ADAP(shost); 3977 uint32_t app_hndl; 3978 3979 app_hndl = mraid_mm_adapter_app_handle(adapter->unique_id); 3980 3981 return snprintf(buf, 8, "%u\n", app_hndl); 3982 } 3983 3984 3985 /** 3986 * megaraid_mbox_ld_show - display the logical drive number for this device 3987 * @dev : device object representation for the scsi device 3988 * @attr : device attribute to show 3989 * @buf : buffer to send data to 3990 * 3991 * Display the logical drive number for the device in question, if it a valid 3992 * logical drive. For physical devices, "-1" is returned. 3993 * 3994 * The logical drive number is displayed in following format: 3995 * 3996 * <SCSI ID> <LD NUM> <LD STICKY ID> <APP ADAPTER HANDLE> 3997 * 3998 * <int> <int> <int> <int> 3999 */ 4000 static ssize_t 4001 megaraid_mbox_ld_show(struct device *dev, struct device_attribute *attr, char *buf) 4002 { 4003 struct scsi_device *sdev = to_scsi_device(dev); 4004 adapter_t *adapter = (adapter_t *)SCSIHOST2ADAP(sdev->host); 4005 mraid_device_t *raid_dev = ADAP2RAIDDEV(adapter); 4006 int scsi_id = -1; 4007 int logical_drv = -1; 4008 int ldid_map = -1; 4009 uint32_t app_hndl = 0; 4010 int mapped_sdev_id; 4011 int rval; 4012 int i; 4013 4014 if (raid_dev->random_del_supported && 4015 MRAID_IS_LOGICAL_SDEV(adapter, sdev)) { 4016 4017 rval = megaraid_sysfs_get_ldmap(adapter); 4018 if (rval == 0) { 4019 4020 for (i = 0; i < MAX_LOGICAL_DRIVES_40LD; i++) { 4021 4022 mapped_sdev_id = sdev->id; 4023 4024 if (sdev->id > adapter->init_id) { 4025 mapped_sdev_id -= 1; 4026 } 4027 4028 if (raid_dev->curr_ldmap[i] == mapped_sdev_id) { 4029 4030 scsi_id = sdev->id; 4031 4032 logical_drv = i; 4033 4034 ldid_map = raid_dev->curr_ldmap[i]; 4035 4036 app_hndl = mraid_mm_adapter_app_handle( 4037 adapter->unique_id); 4038 4039 break; 4040 } 4041 } 4042 } 4043 else { 4044 con_log(CL_ANN, (KERN_NOTICE 4045 "megaraid: sysfs get ld map failed: %x\n", 4046 rval)); 4047 } 4048 } 4049 4050 return snprintf(buf, 36, "%d %d %d %d\n", scsi_id, logical_drv, 4051 ldid_map, app_hndl); 4052 } 4053 4054 4055 /* 4056 * END: Mailbox Low Level Driver 4057 */ 4058 module_init(megaraid_init); 4059 module_exit(megaraid_exit); 4060