1 /* 2 * 3 * Linux MegaRAID device driver 4 * 5 * Copyright (c) 2003-2004 LSI Logic Corporation. 6 * 7 * This program is free software; you can redistribute it and/or 8 * modify it under the terms of the GNU General Public License 9 * as published by the Free Software Foundation; either version 10 * 2 of the License, or (at your option) any later version. 11 * 12 * FILE : megaraid_mbox.c 13 * Version : v2.20.4.7 (Nov 14 2005) 14 * 15 * Authors: 16 * Atul Mukker <Atul.Mukker@lsil.com> 17 * Sreenivas Bagalkote <Sreenivas.Bagalkote@lsil.com> 18 * Manoj Jose <Manoj.Jose@lsil.com> 19 * Seokmann Ju <Seokmann.Ju@lsil.com> 20 * 21 * List of supported controllers 22 * 23 * OEM Product Name VID DID SSVID SSID 24 * --- ------------ --- --- ---- ---- 25 * Dell PERC3/QC 101E 1960 1028 0471 26 * Dell PERC3/DC 101E 1960 1028 0493 27 * Dell PERC3/SC 101E 1960 1028 0475 28 * Dell PERC3/Di 1028 1960 1028 0123 29 * Dell PERC4/SC 1000 1960 1028 0520 30 * Dell PERC4/DC 1000 1960 1028 0518 31 * Dell PERC4/QC 1000 0407 1028 0531 32 * Dell PERC4/Di 1028 000F 1028 014A 33 * Dell PERC 4e/Si 1028 0013 1028 016c 34 * Dell PERC 4e/Di 1028 0013 1028 016d 35 * Dell PERC 4e/Di 1028 0013 1028 016e 36 * Dell PERC 4e/Di 1028 0013 1028 016f 37 * Dell PERC 4e/Di 1028 0013 1028 0170 38 * Dell PERC 4e/DC 1000 0408 1028 0002 39 * Dell PERC 4e/SC 1000 0408 1028 0001 40 * 41 * 42 * LSI MegaRAID SCSI 320-0 1000 1960 1000 A520 43 * LSI MegaRAID SCSI 320-1 1000 1960 1000 0520 44 * LSI MegaRAID SCSI 320-2 1000 1960 1000 0518 45 * LSI MegaRAID SCSI 320-0X 1000 0407 1000 0530 46 * LSI MegaRAID SCSI 320-2X 1000 0407 1000 0532 47 * LSI MegaRAID SCSI 320-4X 1000 0407 1000 0531 48 * LSI MegaRAID SCSI 320-1E 1000 0408 1000 0001 49 * LSI MegaRAID SCSI 320-2E 1000 0408 1000 0002 50 * LSI MegaRAID SATA 150-4 1000 1960 1000 4523 51 * LSI MegaRAID SATA 150-6 1000 1960 1000 0523 52 * LSI MegaRAID SATA 300-4X 1000 0409 1000 3004 53 * LSI MegaRAID SATA 300-8X 1000 0409 1000 3008 54 * 55 * INTEL RAID Controller SRCU42X 1000 0407 8086 0532 56 * INTEL RAID Controller SRCS16 1000 1960 8086 0523 57 * INTEL RAID Controller SRCU42E 1000 0408 8086 0002 58 * INTEL RAID Controller SRCZCRX 1000 0407 8086 0530 59 * INTEL RAID Controller SRCS28X 1000 0409 8086 3008 60 * INTEL RAID Controller SROMBU42E 1000 0408 8086 3431 61 * INTEL RAID Controller SROMBU42E 1000 0408 8086 3499 62 * INTEL RAID Controller SRCU51L 1000 1960 8086 0520 63 * 64 * FSC MegaRAID PCI Express ROMB 1000 0408 1734 1065 65 * 66 * ACER MegaRAID ROMB-2E 1000 0408 1025 004D 67 * 68 * NEC MegaRAID PCI Express ROMB 1000 0408 1033 8287 69 * 70 * For history of changes, see Documentation/ChangeLog.megaraid 71 */ 72 73 #include "megaraid_mbox.h" 74 75 static int megaraid_init(void); 76 static void megaraid_exit(void); 77 78 static int megaraid_probe_one(struct pci_dev*, const struct pci_device_id *); 79 static void megaraid_detach_one(struct pci_dev *); 80 static void megaraid_mbox_shutdown(struct pci_dev *); 81 82 static int megaraid_io_attach(adapter_t *); 83 static void megaraid_io_detach(adapter_t *); 84 85 static int megaraid_init_mbox(adapter_t *); 86 static void megaraid_fini_mbox(adapter_t *); 87 88 static int megaraid_alloc_cmd_packets(adapter_t *); 89 static void megaraid_free_cmd_packets(adapter_t *); 90 91 static int megaraid_mbox_setup_dma_pools(adapter_t *); 92 static void megaraid_mbox_teardown_dma_pools(adapter_t *); 93 94 static int megaraid_sysfs_alloc_resources(adapter_t *); 95 static void megaraid_sysfs_free_resources(adapter_t *); 96 97 static int megaraid_abort_handler(struct scsi_cmnd *); 98 static int megaraid_reset_handler(struct scsi_cmnd *); 99 100 static int mbox_post_sync_cmd(adapter_t *, uint8_t []); 101 static int mbox_post_sync_cmd_fast(adapter_t *, uint8_t []); 102 static int megaraid_busywait_mbox(mraid_device_t *); 103 static int megaraid_mbox_product_info(adapter_t *); 104 static int megaraid_mbox_extended_cdb(adapter_t *); 105 static int megaraid_mbox_support_ha(adapter_t *, uint16_t *); 106 static int megaraid_mbox_support_random_del(adapter_t *); 107 static int megaraid_mbox_get_max_sg(adapter_t *); 108 static void megaraid_mbox_enum_raid_scsi(adapter_t *); 109 static void megaraid_mbox_flush_cache(adapter_t *); 110 111 static void megaraid_mbox_display_scb(adapter_t *, scb_t *); 112 static void megaraid_mbox_setup_device_map(adapter_t *); 113 114 static int megaraid_queue_command(struct scsi_cmnd *, 115 void (*)(struct scsi_cmnd *)); 116 static scb_t *megaraid_mbox_build_cmd(adapter_t *, struct scsi_cmnd *, int *); 117 static void megaraid_mbox_runpendq(adapter_t *, scb_t *); 118 static void megaraid_mbox_prepare_pthru(adapter_t *, scb_t *, 119 struct scsi_cmnd *); 120 static void megaraid_mbox_prepare_epthru(adapter_t *, scb_t *, 121 struct scsi_cmnd *); 122 123 static irqreturn_t megaraid_isr(int, void *, struct pt_regs *); 124 125 static void megaraid_mbox_dpc(unsigned long); 126 127 static ssize_t megaraid_sysfs_show_app_hndl(struct class_device *, char *); 128 static ssize_t megaraid_sysfs_show_ldnum(struct device *, struct device_attribute *attr, char *); 129 130 static int megaraid_cmm_register(adapter_t *); 131 static int megaraid_cmm_unregister(adapter_t *); 132 static int megaraid_mbox_mm_handler(unsigned long, uioc_t *, uint32_t); 133 static int megaraid_mbox_mm_command(adapter_t *, uioc_t *); 134 static void megaraid_mbox_mm_done(adapter_t *, scb_t *); 135 static int gather_hbainfo(adapter_t *, mraid_hba_info_t *); 136 static int wait_till_fw_empty(adapter_t *); 137 138 139 140 MODULE_AUTHOR("sju@lsil.com"); 141 MODULE_DESCRIPTION("LSI Logic MegaRAID Mailbox Driver"); 142 MODULE_LICENSE("GPL"); 143 MODULE_VERSION(MEGARAID_VERSION); 144 145 /* 146 * ### modules parameters for driver ### 147 */ 148 149 /** 150 * Set to enable driver to expose unconfigured disk to kernel 151 */ 152 static int megaraid_expose_unconf_disks = 0; 153 module_param_named(unconf_disks, megaraid_expose_unconf_disks, int, 0); 154 MODULE_PARM_DESC(unconf_disks, 155 "Set to expose unconfigured disks to kernel (default=0)"); 156 157 /** 158 * driver wait time if the adapter's mailbox is busy 159 */ 160 static unsigned int max_mbox_busy_wait = MBOX_BUSY_WAIT; 161 module_param_named(busy_wait, max_mbox_busy_wait, int, 0); 162 MODULE_PARM_DESC(busy_wait, 163 "Max wait for mailbox in microseconds if busy (default=10)"); 164 165 /** 166 * number of sectors per IO command 167 */ 168 static unsigned int megaraid_max_sectors = MBOX_MAX_SECTORS; 169 module_param_named(max_sectors, megaraid_max_sectors, int, 0); 170 MODULE_PARM_DESC(max_sectors, 171 "Maximum number of sectors per IO command (default=128)"); 172 173 /** 174 * number of commands per logical unit 175 */ 176 static unsigned int megaraid_cmd_per_lun = MBOX_DEF_CMD_PER_LUN; 177 module_param_named(cmd_per_lun, megaraid_cmd_per_lun, int, 0); 178 MODULE_PARM_DESC(cmd_per_lun, 179 "Maximum number of commands per logical unit (default=64)"); 180 181 182 /** 183 * Fast driver load option, skip scanning for physical devices during load. 184 * This would result in non-disk devices being skipped during driver load 185 * time. These can be later added though, using /proc/scsi/scsi 186 */ 187 static unsigned int megaraid_fast_load = 0; 188 module_param_named(fast_load, megaraid_fast_load, int, 0); 189 MODULE_PARM_DESC(fast_load, 190 "Faster loading of the driver, skips physical devices! (default=0)"); 191 192 193 /** 194 * mraid_debug level - threshold for amount of information to be displayed by 195 * the driver. This level can be changed through modules parameters, ioctl or 196 * sysfs/proc interface. By default, print the announcement messages only. 197 */ 198 int mraid_debug_level = CL_ANN; 199 module_param_named(debug_level, mraid_debug_level, int, 0); 200 MODULE_PARM_DESC(debug_level, "Debug level for driver (default=0)"); 201 202 /* 203 * ### global data ### 204 */ 205 static uint8_t megaraid_mbox_version[8] = 206 { 0x02, 0x20, 0x04, 0x06, 3, 7, 20, 5 }; 207 208 209 /* 210 * PCI table for all supported controllers. 211 */ 212 static struct pci_device_id pci_id_table_g[] = { 213 { 214 PCI_VENDOR_ID_DELL, 215 PCI_DEVICE_ID_PERC4_DI_DISCOVERY, 216 PCI_VENDOR_ID_DELL, 217 PCI_SUBSYS_ID_PERC4_DI_DISCOVERY, 218 }, 219 { 220 PCI_VENDOR_ID_LSI_LOGIC, 221 PCI_DEVICE_ID_PERC4_SC, 222 PCI_VENDOR_ID_DELL, 223 PCI_SUBSYS_ID_PERC4_SC, 224 }, 225 { 226 PCI_VENDOR_ID_LSI_LOGIC, 227 PCI_DEVICE_ID_PERC4_DC, 228 PCI_VENDOR_ID_DELL, 229 PCI_SUBSYS_ID_PERC4_DC, 230 }, 231 { 232 PCI_VENDOR_ID_LSI_LOGIC, 233 PCI_DEVICE_ID_VERDE, 234 PCI_ANY_ID, 235 PCI_ANY_ID, 236 }, 237 { 238 PCI_VENDOR_ID_DELL, 239 PCI_DEVICE_ID_PERC4_DI_EVERGLADES, 240 PCI_VENDOR_ID_DELL, 241 PCI_SUBSYS_ID_PERC4_DI_EVERGLADES, 242 }, 243 { 244 PCI_VENDOR_ID_DELL, 245 PCI_DEVICE_ID_PERC4E_SI_BIGBEND, 246 PCI_VENDOR_ID_DELL, 247 PCI_SUBSYS_ID_PERC4E_SI_BIGBEND, 248 }, 249 { 250 PCI_VENDOR_ID_DELL, 251 PCI_DEVICE_ID_PERC4E_DI_KOBUK, 252 PCI_VENDOR_ID_DELL, 253 PCI_SUBSYS_ID_PERC4E_DI_KOBUK, 254 }, 255 { 256 PCI_VENDOR_ID_DELL, 257 PCI_DEVICE_ID_PERC4E_DI_CORVETTE, 258 PCI_VENDOR_ID_DELL, 259 PCI_SUBSYS_ID_PERC4E_DI_CORVETTE, 260 }, 261 { 262 PCI_VENDOR_ID_DELL, 263 PCI_DEVICE_ID_PERC4E_DI_EXPEDITION, 264 PCI_VENDOR_ID_DELL, 265 PCI_SUBSYS_ID_PERC4E_DI_EXPEDITION, 266 }, 267 { 268 PCI_VENDOR_ID_DELL, 269 PCI_DEVICE_ID_PERC4E_DI_GUADALUPE, 270 PCI_VENDOR_ID_DELL, 271 PCI_SUBSYS_ID_PERC4E_DI_GUADALUPE, 272 }, 273 { 274 PCI_VENDOR_ID_LSI_LOGIC, 275 PCI_DEVICE_ID_DOBSON, 276 PCI_ANY_ID, 277 PCI_ANY_ID, 278 }, 279 { 280 PCI_VENDOR_ID_AMI, 281 PCI_DEVICE_ID_AMI_MEGARAID3, 282 PCI_ANY_ID, 283 PCI_ANY_ID, 284 }, 285 { 286 PCI_VENDOR_ID_LSI_LOGIC, 287 PCI_DEVICE_ID_AMI_MEGARAID3, 288 PCI_ANY_ID, 289 PCI_ANY_ID, 290 }, 291 { 292 PCI_VENDOR_ID_LSI_LOGIC, 293 PCI_DEVICE_ID_LINDSAY, 294 PCI_ANY_ID, 295 PCI_ANY_ID, 296 }, 297 {0} /* Terminating entry */ 298 }; 299 MODULE_DEVICE_TABLE(pci, pci_id_table_g); 300 301 302 static struct pci_driver megaraid_pci_driver_g = { 303 .name = "megaraid", 304 .id_table = pci_id_table_g, 305 .probe = megaraid_probe_one, 306 .remove = __devexit_p(megaraid_detach_one), 307 .shutdown = megaraid_mbox_shutdown, 308 }; 309 310 311 312 // definitions for the device attributes for exporting logical drive number 313 // for a scsi address (Host, Channel, Id, Lun) 314 315 CLASS_DEVICE_ATTR(megaraid_mbox_app_hndl, S_IRUSR, megaraid_sysfs_show_app_hndl, 316 NULL); 317 318 // Host template initializer for megaraid mbox sysfs device attributes 319 static struct class_device_attribute *megaraid_shost_attrs[] = { 320 &class_device_attr_megaraid_mbox_app_hndl, 321 NULL, 322 }; 323 324 325 DEVICE_ATTR(megaraid_mbox_ld, S_IRUSR, megaraid_sysfs_show_ldnum, NULL); 326 327 // Host template initializer for megaraid mbox sysfs device attributes 328 static struct device_attribute *megaraid_sdev_attrs[] = { 329 &dev_attr_megaraid_mbox_ld, 330 NULL, 331 }; 332 333 334 /* 335 * Scsi host template for megaraid unified driver 336 */ 337 static struct scsi_host_template megaraid_template_g = { 338 .module = THIS_MODULE, 339 .name = "LSI Logic MegaRAID driver", 340 .proc_name = "megaraid", 341 .queuecommand = megaraid_queue_command, 342 .eh_abort_handler = megaraid_abort_handler, 343 .eh_device_reset_handler = megaraid_reset_handler, 344 .eh_bus_reset_handler = megaraid_reset_handler, 345 .eh_host_reset_handler = megaraid_reset_handler, 346 .use_clustering = ENABLE_CLUSTERING, 347 .sdev_attrs = megaraid_sdev_attrs, 348 .shost_attrs = megaraid_shost_attrs, 349 }; 350 351 352 /** 353 * megaraid_init - module load hook 354 * 355 * We register ourselves as hotplug enabled module and let PCI subsystem 356 * discover our adaters 357 **/ 358 static int __init 359 megaraid_init(void) 360 { 361 int rval; 362 363 // Announce the driver version 364 con_log(CL_ANN, (KERN_INFO "megaraid: %s %s\n", MEGARAID_VERSION, 365 MEGARAID_EXT_VERSION)); 366 367 // check validity of module parameters 368 if (megaraid_cmd_per_lun > MBOX_MAX_SCSI_CMDS) { 369 370 con_log(CL_ANN, (KERN_WARNING 371 "megaraid mailbox: max commands per lun reset to %d\n", 372 MBOX_MAX_SCSI_CMDS)); 373 374 megaraid_cmd_per_lun = MBOX_MAX_SCSI_CMDS; 375 } 376 377 378 // register as a PCI hot-plug driver module 379 rval = pci_register_driver(&megaraid_pci_driver_g); 380 if (rval < 0) { 381 con_log(CL_ANN, (KERN_WARNING 382 "megaraid: could not register hotplug support.\n")); 383 } 384 385 return rval; 386 } 387 388 389 /** 390 * megaraid_exit - driver unload entry point 391 * 392 * We simply unwrap the megaraid_init routine here 393 */ 394 static void __exit 395 megaraid_exit(void) 396 { 397 con_log(CL_DLEVEL1, (KERN_NOTICE "megaraid: unloading framework\n")); 398 399 // unregister as PCI hotplug driver 400 pci_unregister_driver(&megaraid_pci_driver_g); 401 402 return; 403 } 404 405 406 /** 407 * megaraid_probe_one - PCI hotplug entry point 408 * @param pdev : handle to this controller's PCI configuration space 409 * @param id : pci device id of the class of controllers 410 * 411 * This routine should be called whenever a new adapter is detected by the 412 * PCI hotplug susbsytem. 413 **/ 414 static int __devinit 415 megaraid_probe_one(struct pci_dev *pdev, const struct pci_device_id *id) 416 { 417 adapter_t *adapter; 418 419 420 // detected a new controller 421 con_log(CL_ANN, (KERN_INFO 422 "megaraid: probe new device %#4.04x:%#4.04x:%#4.04x:%#4.04x: ", 423 pdev->vendor, pdev->device, pdev->subsystem_vendor, 424 pdev->subsystem_device)); 425 426 con_log(CL_ANN, ("bus %d:slot %d:func %d\n", pdev->bus->number, 427 PCI_SLOT(pdev->devfn), PCI_FUNC(pdev->devfn))); 428 429 if (pci_enable_device(pdev)) { 430 con_log(CL_ANN, (KERN_WARNING 431 "megaraid: pci_enable_device failed\n")); 432 433 return -ENODEV; 434 } 435 436 // Enable bus-mastering on this controller 437 pci_set_master(pdev); 438 439 // Allocate the per driver initialization structure 440 adapter = kmalloc(sizeof(adapter_t), GFP_KERNEL); 441 442 if (adapter == NULL) { 443 con_log(CL_ANN, (KERN_WARNING 444 "megaraid: out of memory, %s %d.\n", __FUNCTION__, __LINE__)); 445 446 goto out_probe_one; 447 } 448 memset(adapter, 0, sizeof(adapter_t)); 449 450 451 // set up PCI related soft state and other pre-known parameters 452 adapter->unique_id = pdev->bus->number << 8 | pdev->devfn; 453 adapter->irq = pdev->irq; 454 adapter->pdev = pdev; 455 456 atomic_set(&adapter->being_detached, 0); 457 458 // Setup the default DMA mask. This would be changed later on 459 // depending on hardware capabilities 460 if (pci_set_dma_mask(adapter->pdev, DMA_32BIT_MASK) != 0) { 461 462 con_log(CL_ANN, (KERN_WARNING 463 "megaraid: pci_set_dma_mask failed:%d\n", __LINE__)); 464 465 goto out_free_adapter; 466 } 467 468 469 // Initialize the synchronization lock for kernel and LLD 470 spin_lock_init(&adapter->lock); 471 472 // Initialize the command queues: the list of free SCBs and the list 473 // of pending SCBs. 474 INIT_LIST_HEAD(&adapter->kscb_pool); 475 spin_lock_init(SCSI_FREE_LIST_LOCK(adapter)); 476 477 INIT_LIST_HEAD(&adapter->pend_list); 478 spin_lock_init(PENDING_LIST_LOCK(adapter)); 479 480 INIT_LIST_HEAD(&adapter->completed_list); 481 spin_lock_init(COMPLETED_LIST_LOCK(adapter)); 482 483 484 // Start the mailbox based controller 485 if (megaraid_init_mbox(adapter) != 0) { 486 con_log(CL_ANN, (KERN_WARNING 487 "megaraid: maibox adapter did not initialize\n")); 488 489 goto out_free_adapter; 490 } 491 492 // Register with LSI Common Management Module 493 if (megaraid_cmm_register(adapter) != 0) { 494 495 con_log(CL_ANN, (KERN_WARNING 496 "megaraid: could not register with management module\n")); 497 498 goto out_fini_mbox; 499 } 500 501 // setup adapter handle in PCI soft state 502 pci_set_drvdata(pdev, adapter); 503 504 // attach with scsi mid-layer 505 if (megaraid_io_attach(adapter) != 0) { 506 507 con_log(CL_ANN, (KERN_WARNING "megaraid: io attach failed\n")); 508 509 goto out_cmm_unreg; 510 } 511 512 return 0; 513 514 out_cmm_unreg: 515 pci_set_drvdata(pdev, NULL); 516 megaraid_cmm_unregister(adapter); 517 out_fini_mbox: 518 megaraid_fini_mbox(adapter); 519 out_free_adapter: 520 kfree(adapter); 521 out_probe_one: 522 pci_disable_device(pdev); 523 524 return -ENODEV; 525 } 526 527 528 /** 529 * megaraid_detach_one - release the framework resources and call LLD release 530 * routine 531 * @param pdev : handle for our PCI cofiguration space 532 * 533 * This routine is called during driver unload. We free all the allocated 534 * resources and call the corresponding LLD so that it can also release all 535 * its resources. 536 * 537 * This routine is also called from the PCI hotplug system 538 **/ 539 static void 540 megaraid_detach_one(struct pci_dev *pdev) 541 { 542 adapter_t *adapter; 543 struct Scsi_Host *host; 544 545 546 // Start a rollback on this adapter 547 adapter = pci_get_drvdata(pdev); 548 549 if (!adapter) { 550 con_log(CL_ANN, (KERN_CRIT 551 "megaraid: Invalid detach on %#4.04x:%#4.04x:%#4.04x:%#4.04x\n", 552 pdev->vendor, pdev->device, pdev->subsystem_vendor, 553 pdev->subsystem_device)); 554 555 return; 556 } 557 else { 558 con_log(CL_ANN, (KERN_NOTICE 559 "megaraid: detaching device %#4.04x:%#4.04x:%#4.04x:%#4.04x\n", 560 pdev->vendor, pdev->device, pdev->subsystem_vendor, 561 pdev->subsystem_device)); 562 } 563 564 565 host = adapter->host; 566 567 // do not allow any more requests from the management module for this 568 // adapter. 569 // FIXME: How do we account for the request which might still be 570 // pending with us? 571 atomic_set(&adapter->being_detached, 1); 572 573 // detach from the IO sub-system 574 megaraid_io_detach(adapter); 575 576 // reset the device state in the PCI structure. We check this 577 // condition when we enter here. If the device state is NULL, 578 // that would mean the device has already been removed 579 pci_set_drvdata(pdev, NULL); 580 581 // Unregister from common management module 582 // 583 // FIXME: this must return success or failure for conditions if there 584 // is a command pending with LLD or not. 585 megaraid_cmm_unregister(adapter); 586 587 // finalize the mailbox based controller and release all resources 588 megaraid_fini_mbox(adapter); 589 590 kfree(adapter); 591 592 scsi_host_put(host); 593 594 pci_disable_device(pdev); 595 596 return; 597 } 598 599 600 /** 601 * megaraid_mbox_shutdown - PCI shutdown for megaraid HBA 602 * @param device : generice driver model device 603 * 604 * Shutdown notification, perform flush cache 605 */ 606 static void 607 megaraid_mbox_shutdown(struct pci_dev *pdev) 608 { 609 adapter_t *adapter = pci_get_drvdata(pdev); 610 static int counter; 611 612 if (!adapter) { 613 con_log(CL_ANN, (KERN_WARNING 614 "megaraid: null device in shutdown\n")); 615 return; 616 } 617 618 // flush caches now 619 con_log(CL_ANN, (KERN_INFO "megaraid: flushing adapter %d...", 620 counter++)); 621 622 megaraid_mbox_flush_cache(adapter); 623 624 con_log(CL_ANN, ("done\n")); 625 } 626 627 628 /** 629 * megaraid_io_attach - attach a device with the IO subsystem 630 * @param adapter : controller's soft state 631 * 632 * Attach this device with the IO subsystem 633 **/ 634 static int 635 megaraid_io_attach(adapter_t *adapter) 636 { 637 struct Scsi_Host *host; 638 639 // Initialize SCSI Host structure 640 host = scsi_host_alloc(&megaraid_template_g, 8); 641 if (!host) { 642 con_log(CL_ANN, (KERN_WARNING 643 "megaraid mbox: scsi_register failed\n")); 644 645 return -1; 646 } 647 648 SCSIHOST2ADAP(host) = (caddr_t)adapter; 649 adapter->host = host; 650 651 host->irq = adapter->irq; 652 host->unique_id = adapter->unique_id; 653 host->can_queue = adapter->max_cmds; 654 host->this_id = adapter->init_id; 655 host->sg_tablesize = adapter->sglen; 656 host->max_sectors = adapter->max_sectors; 657 host->cmd_per_lun = adapter->cmd_per_lun; 658 host->max_channel = adapter->max_channel; 659 host->max_id = adapter->max_target; 660 host->max_lun = adapter->max_lun; 661 662 663 // notify mid-layer about the new controller 664 if (scsi_add_host(host, &adapter->pdev->dev)) { 665 666 con_log(CL_ANN, (KERN_WARNING 667 "megaraid mbox: scsi_add_host failed\n")); 668 669 scsi_host_put(host); 670 671 return -1; 672 } 673 674 scsi_scan_host(host); 675 676 return 0; 677 } 678 679 680 /** 681 * megaraid_io_detach - detach a device from the IO subsystem 682 * @param adapter : controller's soft state 683 * 684 * Detach this device from the IO subsystem 685 **/ 686 static void 687 megaraid_io_detach(adapter_t *adapter) 688 { 689 struct Scsi_Host *host; 690 691 con_log(CL_DLEVEL1, (KERN_INFO "megaraid: io detach\n")); 692 693 host = adapter->host; 694 695 scsi_remove_host(host); 696 697 return; 698 } 699 700 701 /* 702 * START: Mailbox Low Level Driver 703 * 704 * This is section specific to the single mailbox based controllers 705 */ 706 707 /** 708 * megaraid_init_mbox - initialize controller 709 * @param adapter - our soft state 710 * 711 * . Allocate 16-byte aligned mailbox memory for firmware handshake 712 * . Allocate controller's memory resources 713 * . Find out all initialization data 714 * . Allocate memory required for all the commands 715 * . Use internal library of FW routines, build up complete soft state 716 */ 717 static int __init 718 megaraid_init_mbox(adapter_t *adapter) 719 { 720 struct pci_dev *pdev; 721 mraid_device_t *raid_dev; 722 int i; 723 724 725 adapter->ito = MBOX_TIMEOUT; 726 pdev = adapter->pdev; 727 728 /* 729 * Allocate and initialize the init data structure for mailbox 730 * controllers 731 */ 732 raid_dev = kmalloc(sizeof(mraid_device_t), GFP_KERNEL); 733 if (raid_dev == NULL) return -1; 734 735 memset(raid_dev, 0, sizeof(mraid_device_t)); 736 737 /* 738 * Attach the adapter soft state to raid device soft state 739 */ 740 adapter->raid_device = (caddr_t)raid_dev; 741 raid_dev->fast_load = megaraid_fast_load; 742 743 744 // our baseport 745 raid_dev->baseport = pci_resource_start(pdev, 0); 746 747 if (pci_request_regions(pdev, "MegaRAID: LSI Logic Corporation") != 0) { 748 749 con_log(CL_ANN, (KERN_WARNING 750 "megaraid: mem region busy\n")); 751 752 goto out_free_raid_dev; 753 } 754 755 raid_dev->baseaddr = ioremap_nocache(raid_dev->baseport, 128); 756 757 if (!raid_dev->baseaddr) { 758 759 con_log(CL_ANN, (KERN_WARNING 760 "megaraid: could not map hba memory\n") ); 761 762 goto out_release_regions; 763 } 764 765 // 766 // Setup the rest of the soft state using the library of FW routines 767 // 768 769 // request IRQ and register the interrupt service routine 770 if (request_irq(adapter->irq, megaraid_isr, SA_SHIRQ, "megaraid", 771 adapter)) { 772 773 con_log(CL_ANN, (KERN_WARNING 774 "megaraid: Couldn't register IRQ %d!\n", adapter->irq)); 775 776 goto out_iounmap; 777 } 778 779 780 // initialize the mutual exclusion lock for the mailbox 781 spin_lock_init(&raid_dev->mailbox_lock); 782 783 // allocate memory required for commands 784 if (megaraid_alloc_cmd_packets(adapter) != 0) { 785 goto out_free_irq; 786 } 787 788 // Product info 789 if (megaraid_mbox_product_info(adapter) != 0) { 790 goto out_alloc_cmds; 791 } 792 793 // Do we support extended CDBs 794 adapter->max_cdb_sz = 10; 795 if (megaraid_mbox_extended_cdb(adapter) == 0) { 796 adapter->max_cdb_sz = 16; 797 } 798 799 /* 800 * Do we support cluster environment, if we do, what is the initiator 801 * id. 802 * NOTE: In a non-cluster aware firmware environment, the LLD should 803 * return 7 as initiator id. 804 */ 805 adapter->ha = 0; 806 adapter->init_id = -1; 807 if (megaraid_mbox_support_ha(adapter, &adapter->init_id) == 0) { 808 adapter->ha = 1; 809 } 810 811 /* 812 * Prepare the device ids array to have the mapping between the kernel 813 * device address and megaraid device address. 814 * We export the physical devices on their actual addresses. The 815 * logical drives are exported on a virtual SCSI channel 816 */ 817 megaraid_mbox_setup_device_map(adapter); 818 819 // If the firmware supports random deletion, update the device id map 820 if (megaraid_mbox_support_random_del(adapter)) { 821 822 // Change the logical drives numbers in device_ids array one 823 // slot in device_ids is reserved for target id, that's why 824 // "<=" below 825 for (i = 0; i <= MAX_LOGICAL_DRIVES_40LD; i++) { 826 adapter->device_ids[adapter->max_channel][i] += 0x80; 827 } 828 adapter->device_ids[adapter->max_channel][adapter->init_id] = 829 0xFF; 830 831 raid_dev->random_del_supported = 1; 832 } 833 834 /* 835 * find out the maximum number of scatter-gather elements supported by 836 * this firmware 837 */ 838 adapter->sglen = megaraid_mbox_get_max_sg(adapter); 839 840 // enumerate RAID and SCSI channels so that all devices on SCSI 841 // channels can later be exported, including disk devices 842 megaraid_mbox_enum_raid_scsi(adapter); 843 844 /* 845 * Other parameters required by upper layer 846 * 847 * maximum number of sectors per IO command 848 */ 849 adapter->max_sectors = megaraid_max_sectors; 850 851 /* 852 * number of queued commands per LUN. 853 */ 854 adapter->cmd_per_lun = megaraid_cmd_per_lun; 855 856 /* 857 * Allocate resources required to issue FW calls, when sysfs is 858 * accessed 859 */ 860 if (megaraid_sysfs_alloc_resources(adapter) != 0) { 861 goto out_alloc_cmds; 862 } 863 864 // Set the DMA mask to 64-bit. All supported controllers as capable of 865 // DMA in this range 866 if (pci_set_dma_mask(adapter->pdev, DMA_64BIT_MASK) != 0) { 867 868 con_log(CL_ANN, (KERN_WARNING 869 "megaraid: could not set DMA mask for 64-bit.\n")); 870 871 goto out_free_sysfs_res; 872 } 873 874 // setup tasklet for DPC 875 tasklet_init(&adapter->dpc_h, megaraid_mbox_dpc, 876 (unsigned long)adapter); 877 878 con_log(CL_DLEVEL1, (KERN_INFO 879 "megaraid mbox hba successfully initialized\n")); 880 881 return 0; 882 883 out_free_sysfs_res: 884 megaraid_sysfs_free_resources(adapter); 885 out_alloc_cmds: 886 megaraid_free_cmd_packets(adapter); 887 out_free_irq: 888 free_irq(adapter->irq, adapter); 889 out_iounmap: 890 iounmap(raid_dev->baseaddr); 891 out_release_regions: 892 pci_release_regions(pdev); 893 out_free_raid_dev: 894 kfree(raid_dev); 895 896 return -1; 897 } 898 899 900 /** 901 * megaraid_fini_mbox - undo controller initialization 902 * @param adapter : our soft state 903 */ 904 static void 905 megaraid_fini_mbox(adapter_t *adapter) 906 { 907 mraid_device_t *raid_dev = ADAP2RAIDDEV(adapter); 908 909 // flush all caches 910 megaraid_mbox_flush_cache(adapter); 911 912 tasklet_kill(&adapter->dpc_h); 913 914 megaraid_sysfs_free_resources(adapter); 915 916 megaraid_free_cmd_packets(adapter); 917 918 free_irq(adapter->irq, adapter); 919 920 iounmap(raid_dev->baseaddr); 921 922 pci_release_regions(adapter->pdev); 923 924 kfree(raid_dev); 925 926 return; 927 } 928 929 930 /** 931 * megaraid_alloc_cmd_packets - allocate shared mailbox 932 * @param adapter : soft state of the raid controller 933 * 934 * Allocate and align the shared mailbox. This maibox is used to issue 935 * all the commands. For IO based controllers, the mailbox is also regsitered 936 * with the FW. Allocate memory for all commands as well. 937 * This is our big allocator 938 */ 939 static int 940 megaraid_alloc_cmd_packets(adapter_t *adapter) 941 { 942 mraid_device_t *raid_dev = ADAP2RAIDDEV(adapter); 943 struct pci_dev *pdev; 944 unsigned long align; 945 scb_t *scb; 946 mbox_ccb_t *ccb; 947 struct mraid_pci_blk *epthru_pci_blk; 948 struct mraid_pci_blk *sg_pci_blk; 949 struct mraid_pci_blk *mbox_pci_blk; 950 int i; 951 952 pdev = adapter->pdev; 953 954 /* 955 * Setup the mailbox 956 * Allocate the common 16-byte aligned memory for the handshake 957 * mailbox. 958 */ 959 raid_dev->una_mbox64 = pci_alloc_consistent(adapter->pdev, 960 sizeof(mbox64_t), &raid_dev->una_mbox64_dma); 961 962 if (!raid_dev->una_mbox64) { 963 con_log(CL_ANN, (KERN_WARNING 964 "megaraid: out of memory, %s %d\n", __FUNCTION__, 965 __LINE__)); 966 return -1; 967 } 968 memset(raid_dev->una_mbox64, 0, sizeof(mbox64_t)); 969 970 /* 971 * Align the mailbox at 16-byte boundary 972 */ 973 raid_dev->mbox = &raid_dev->una_mbox64->mbox32; 974 975 raid_dev->mbox = (mbox_t *)((((unsigned long)raid_dev->mbox) + 15) & 976 (~0UL ^ 0xFUL)); 977 978 raid_dev->mbox64 = (mbox64_t *)(((unsigned long)raid_dev->mbox) - 8); 979 980 align = ((void *)raid_dev->mbox - 981 ((void *)&raid_dev->una_mbox64->mbox32)); 982 983 raid_dev->mbox_dma = (unsigned long)raid_dev->una_mbox64_dma + 8 + 984 align; 985 986 // Allocate memory for commands issued internally 987 adapter->ibuf = pci_alloc_consistent(pdev, MBOX_IBUF_SIZE, 988 &adapter->ibuf_dma_h); 989 if (!adapter->ibuf) { 990 991 con_log(CL_ANN, (KERN_WARNING 992 "megaraid: out of memory, %s %d\n", __FUNCTION__, 993 __LINE__)); 994 995 goto out_free_common_mbox; 996 } 997 memset(adapter->ibuf, 0, MBOX_IBUF_SIZE); 998 999 // Allocate memory for our SCSI Command Blocks and their associated 1000 // memory 1001 1002 /* 1003 * Allocate memory for the base list of scb. Later allocate memory for 1004 * CCBs and embedded components of each CCB and point the pointers in 1005 * scb to the allocated components 1006 * NOTE: The code to allocate SCB will be duplicated in all the LLD 1007 * since the calling routine does not yet know the number of available 1008 * commands. 1009 */ 1010 adapter->kscb_list = kmalloc(sizeof(scb_t) * MBOX_MAX_SCSI_CMDS, 1011 GFP_KERNEL); 1012 1013 if (adapter->kscb_list == NULL) { 1014 con_log(CL_ANN, (KERN_WARNING 1015 "megaraid: out of memory, %s %d\n", __FUNCTION__, 1016 __LINE__)); 1017 goto out_free_ibuf; 1018 } 1019 memset(adapter->kscb_list, 0, sizeof(scb_t) * MBOX_MAX_SCSI_CMDS); 1020 1021 // memory allocation for our command packets 1022 if (megaraid_mbox_setup_dma_pools(adapter) != 0) { 1023 con_log(CL_ANN, (KERN_WARNING 1024 "megaraid: out of memory, %s %d\n", __FUNCTION__, 1025 __LINE__)); 1026 goto out_free_scb_list; 1027 } 1028 1029 // Adjust the scb pointers and link in the free pool 1030 epthru_pci_blk = raid_dev->epthru_pool; 1031 sg_pci_blk = raid_dev->sg_pool; 1032 mbox_pci_blk = raid_dev->mbox_pool; 1033 1034 for (i = 0; i < MBOX_MAX_SCSI_CMDS; i++) { 1035 scb = adapter->kscb_list + i; 1036 ccb = raid_dev->ccb_list + i; 1037 1038 ccb->mbox = (mbox_t *)(mbox_pci_blk[i].vaddr + 16); 1039 ccb->raw_mbox = (uint8_t *)ccb->mbox; 1040 ccb->mbox64 = (mbox64_t *)(mbox_pci_blk[i].vaddr + 8); 1041 ccb->mbox_dma_h = (unsigned long)mbox_pci_blk[i].dma_addr + 16; 1042 1043 // make sure the mailbox is aligned properly 1044 if (ccb->mbox_dma_h & 0x0F) { 1045 con_log(CL_ANN, (KERN_CRIT 1046 "megaraid mbox: not aligned on 16-bytes\n")); 1047 1048 goto out_teardown_dma_pools; 1049 } 1050 1051 ccb->epthru = (mraid_epassthru_t *) 1052 epthru_pci_blk[i].vaddr; 1053 ccb->epthru_dma_h = epthru_pci_blk[i].dma_addr; 1054 ccb->pthru = (mraid_passthru_t *)ccb->epthru; 1055 ccb->pthru_dma_h = ccb->epthru_dma_h; 1056 1057 1058 ccb->sgl64 = (mbox_sgl64 *)sg_pci_blk[i].vaddr; 1059 ccb->sgl_dma_h = sg_pci_blk[i].dma_addr; 1060 ccb->sgl32 = (mbox_sgl32 *)ccb->sgl64; 1061 1062 scb->ccb = (caddr_t)ccb; 1063 scb->gp = 0; 1064 1065 scb->sno = i; // command index 1066 1067 scb->scp = NULL; 1068 scb->state = SCB_FREE; 1069 scb->dma_direction = PCI_DMA_NONE; 1070 scb->dma_type = MRAID_DMA_NONE; 1071 scb->dev_channel = -1; 1072 scb->dev_target = -1; 1073 1074 // put scb in the free pool 1075 list_add_tail(&scb->list, &adapter->kscb_pool); 1076 } 1077 1078 return 0; 1079 1080 out_teardown_dma_pools: 1081 megaraid_mbox_teardown_dma_pools(adapter); 1082 out_free_scb_list: 1083 kfree(adapter->kscb_list); 1084 out_free_ibuf: 1085 pci_free_consistent(pdev, MBOX_IBUF_SIZE, (void *)adapter->ibuf, 1086 adapter->ibuf_dma_h); 1087 out_free_common_mbox: 1088 pci_free_consistent(adapter->pdev, sizeof(mbox64_t), 1089 (caddr_t)raid_dev->una_mbox64, raid_dev->una_mbox64_dma); 1090 1091 return -1; 1092 } 1093 1094 1095 /** 1096 * megaraid_free_cmd_packets - free memory 1097 * @param adapter : soft state of the raid controller 1098 * 1099 * Release memory resources allocated for commands 1100 */ 1101 static void 1102 megaraid_free_cmd_packets(adapter_t *adapter) 1103 { 1104 mraid_device_t *raid_dev = ADAP2RAIDDEV(adapter); 1105 1106 megaraid_mbox_teardown_dma_pools(adapter); 1107 1108 kfree(adapter->kscb_list); 1109 1110 pci_free_consistent(adapter->pdev, MBOX_IBUF_SIZE, 1111 (void *)adapter->ibuf, adapter->ibuf_dma_h); 1112 1113 pci_free_consistent(adapter->pdev, sizeof(mbox64_t), 1114 (caddr_t)raid_dev->una_mbox64, raid_dev->una_mbox64_dma); 1115 return; 1116 } 1117 1118 1119 /** 1120 * megaraid_mbox_setup_dma_pools - setup dma pool for command packets 1121 * @param adapter : HBA soft state 1122 * 1123 * setup the dma pools for mailbox, passthru and extended passthru structures, 1124 * and scatter-gather lists 1125 */ 1126 static int 1127 megaraid_mbox_setup_dma_pools(adapter_t *adapter) 1128 { 1129 mraid_device_t *raid_dev = ADAP2RAIDDEV(adapter); 1130 struct mraid_pci_blk *epthru_pci_blk; 1131 struct mraid_pci_blk *sg_pci_blk; 1132 struct mraid_pci_blk *mbox_pci_blk; 1133 int i; 1134 1135 1136 1137 // Allocate memory for 16-bytes aligned mailboxes 1138 raid_dev->mbox_pool_handle = pci_pool_create("megaraid mbox pool", 1139 adapter->pdev, 1140 sizeof(mbox64_t) + 16, 1141 16, 0); 1142 1143 if (raid_dev->mbox_pool_handle == NULL) { 1144 goto fail_setup_dma_pool; 1145 } 1146 1147 mbox_pci_blk = raid_dev->mbox_pool; 1148 for (i = 0; i < MBOX_MAX_SCSI_CMDS; i++) { 1149 mbox_pci_blk[i].vaddr = pci_pool_alloc( 1150 raid_dev->mbox_pool_handle, 1151 GFP_KERNEL, 1152 &mbox_pci_blk[i].dma_addr); 1153 if (!mbox_pci_blk[i].vaddr) { 1154 goto fail_setup_dma_pool; 1155 } 1156 } 1157 1158 /* 1159 * Allocate memory for each embedded passthru strucuture pointer 1160 * Request for a 128 bytes aligned structure for each passthru command 1161 * structure 1162 * Since passthru and extended passthru commands are exclusive, they 1163 * share common memory pool. Passthru structures piggyback on memory 1164 * allocted to extended passthru since passthru is smaller of the two 1165 */ 1166 raid_dev->epthru_pool_handle = pci_pool_create("megaraid mbox pthru", 1167 adapter->pdev, sizeof(mraid_epassthru_t), 128, 0); 1168 1169 if (raid_dev->epthru_pool_handle == NULL) { 1170 goto fail_setup_dma_pool; 1171 } 1172 1173 epthru_pci_blk = raid_dev->epthru_pool; 1174 for (i = 0; i < MBOX_MAX_SCSI_CMDS; i++) { 1175 epthru_pci_blk[i].vaddr = pci_pool_alloc( 1176 raid_dev->epthru_pool_handle, 1177 GFP_KERNEL, 1178 &epthru_pci_blk[i].dma_addr); 1179 if (!epthru_pci_blk[i].vaddr) { 1180 goto fail_setup_dma_pool; 1181 } 1182 } 1183 1184 1185 // Allocate memory for each scatter-gather list. Request for 512 bytes 1186 // alignment for each sg list 1187 raid_dev->sg_pool_handle = pci_pool_create("megaraid mbox sg", 1188 adapter->pdev, 1189 sizeof(mbox_sgl64) * MBOX_MAX_SG_SIZE, 1190 512, 0); 1191 1192 if (raid_dev->sg_pool_handle == NULL) { 1193 goto fail_setup_dma_pool; 1194 } 1195 1196 sg_pci_blk = raid_dev->sg_pool; 1197 for (i = 0; i < MBOX_MAX_SCSI_CMDS; i++) { 1198 sg_pci_blk[i].vaddr = pci_pool_alloc( 1199 raid_dev->sg_pool_handle, 1200 GFP_KERNEL, 1201 &sg_pci_blk[i].dma_addr); 1202 if (!sg_pci_blk[i].vaddr) { 1203 goto fail_setup_dma_pool; 1204 } 1205 } 1206 1207 return 0; 1208 1209 fail_setup_dma_pool: 1210 megaraid_mbox_teardown_dma_pools(adapter); 1211 return -1; 1212 } 1213 1214 1215 /** 1216 * megaraid_mbox_teardown_dma_pools - teardown dma pools for command packets 1217 * @param adapter : HBA soft state 1218 * 1219 * teardown the dma pool for mailbox, passthru and extended passthru 1220 * structures, and scatter-gather lists 1221 */ 1222 static void 1223 megaraid_mbox_teardown_dma_pools(adapter_t *adapter) 1224 { 1225 mraid_device_t *raid_dev = ADAP2RAIDDEV(adapter); 1226 struct mraid_pci_blk *epthru_pci_blk; 1227 struct mraid_pci_blk *sg_pci_blk; 1228 struct mraid_pci_blk *mbox_pci_blk; 1229 int i; 1230 1231 1232 sg_pci_blk = raid_dev->sg_pool; 1233 for (i = 0; i < MBOX_MAX_SCSI_CMDS && sg_pci_blk[i].vaddr; i++) { 1234 pci_pool_free(raid_dev->sg_pool_handle, sg_pci_blk[i].vaddr, 1235 sg_pci_blk[i].dma_addr); 1236 } 1237 if (raid_dev->sg_pool_handle) 1238 pci_pool_destroy(raid_dev->sg_pool_handle); 1239 1240 1241 epthru_pci_blk = raid_dev->epthru_pool; 1242 for (i = 0; i < MBOX_MAX_SCSI_CMDS && epthru_pci_blk[i].vaddr; i++) { 1243 pci_pool_free(raid_dev->epthru_pool_handle, 1244 epthru_pci_blk[i].vaddr, epthru_pci_blk[i].dma_addr); 1245 } 1246 if (raid_dev->epthru_pool_handle) 1247 pci_pool_destroy(raid_dev->epthru_pool_handle); 1248 1249 1250 mbox_pci_blk = raid_dev->mbox_pool; 1251 for (i = 0; i < MBOX_MAX_SCSI_CMDS && mbox_pci_blk[i].vaddr; i++) { 1252 pci_pool_free(raid_dev->mbox_pool_handle, 1253 mbox_pci_blk[i].vaddr, mbox_pci_blk[i].dma_addr); 1254 } 1255 if (raid_dev->mbox_pool_handle) 1256 pci_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 * 1266 * return the scb from the head of the free list. NULL if there are none 1267 * available 1268 **/ 1269 static inline scb_t * 1270 megaraid_alloc_scb(adapter_t *adapter, struct scsi_cmnd *scp) 1271 { 1272 struct list_head *head = &adapter->kscb_pool; 1273 scb_t *scb = NULL; 1274 unsigned long flags; 1275 1276 // detach scb from free pool 1277 spin_lock_irqsave(SCSI_FREE_LIST_LOCK(adapter), flags); 1278 1279 if (list_empty(head)) { 1280 spin_unlock_irqrestore(SCSI_FREE_LIST_LOCK(adapter), flags); 1281 return NULL; 1282 } 1283 1284 scb = list_entry(head->next, scb_t, list); 1285 list_del_init(&scb->list); 1286 1287 spin_unlock_irqrestore(SCSI_FREE_LIST_LOCK(adapter), flags); 1288 1289 scb->state = SCB_ACTIVE; 1290 scb->scp = scp; 1291 scb->dma_type = MRAID_DMA_NONE; 1292 1293 return scb; 1294 } 1295 1296 1297 /** 1298 * megaraid_dealloc_scb - return the scb to the free pool 1299 * @adapter : controller's soft state 1300 * @scb : scb to be freed 1301 * 1302 * return the scb back to the free list of scbs. The caller must 'flush' the 1303 * SCB before calling us. E.g., performing pci_unamp and/or pci_sync etc. 1304 * NOTE NOTE: Make sure the scb is not on any list before calling this 1305 * routine. 1306 **/ 1307 static inline void 1308 megaraid_dealloc_scb(adapter_t *adapter, scb_t *scb) 1309 { 1310 unsigned long flags; 1311 1312 // put scb in the free pool 1313 scb->state = SCB_FREE; 1314 scb->scp = NULL; 1315 spin_lock_irqsave(SCSI_FREE_LIST_LOCK(adapter), flags); 1316 1317 list_add(&scb->list, &adapter->kscb_pool); 1318 1319 spin_unlock_irqrestore(SCSI_FREE_LIST_LOCK(adapter), flags); 1320 1321 return; 1322 } 1323 1324 1325 /** 1326 * megaraid_mbox_mksgl - make the scatter-gather list 1327 * @adapter - controller's soft state 1328 * @scb - scsi control block 1329 * 1330 * prepare the scatter-gather list 1331 */ 1332 static inline int 1333 megaraid_mbox_mksgl(adapter_t *adapter, scb_t *scb) 1334 { 1335 struct scatterlist *sgl; 1336 mbox_ccb_t *ccb; 1337 struct page *page; 1338 unsigned long offset; 1339 struct scsi_cmnd *scp; 1340 int sgcnt; 1341 int i; 1342 1343 1344 scp = scb->scp; 1345 ccb = (mbox_ccb_t *)scb->ccb; 1346 1347 // no mapping required if no data to be transferred 1348 if (!scp->request_buffer || !scp->request_bufflen) 1349 return 0; 1350 1351 if (!scp->use_sg) { /* scatter-gather list not used */ 1352 1353 page = virt_to_page(scp->request_buffer); 1354 1355 offset = ((unsigned long)scp->request_buffer & ~PAGE_MASK); 1356 1357 ccb->buf_dma_h = pci_map_page(adapter->pdev, page, offset, 1358 scp->request_bufflen, 1359 scb->dma_direction); 1360 scb->dma_type = MRAID_DMA_WBUF; 1361 1362 /* 1363 * We need to handle special 64-bit commands that need a 1364 * minimum of 1 SG 1365 */ 1366 sgcnt = 1; 1367 ccb->sgl64[0].address = ccb->buf_dma_h; 1368 ccb->sgl64[0].length = scp->request_bufflen; 1369 1370 return sgcnt; 1371 } 1372 1373 sgl = (struct scatterlist *)scp->request_buffer; 1374 1375 // The number of sg elements returned must not exceed our limit 1376 sgcnt = pci_map_sg(adapter->pdev, sgl, scp->use_sg, 1377 scb->dma_direction); 1378 1379 if (sgcnt > adapter->sglen) { 1380 con_log(CL_ANN, (KERN_CRIT 1381 "megaraid critical: too many sg elements:%d\n", 1382 sgcnt)); 1383 BUG(); 1384 } 1385 1386 scb->dma_type = MRAID_DMA_WSG; 1387 1388 for (i = 0; i < sgcnt; i++, sgl++) { 1389 ccb->sgl64[i].address = sg_dma_address(sgl); 1390 ccb->sgl64[i].length = sg_dma_len(sgl); 1391 } 1392 1393 // Return count of SG nodes 1394 return sgcnt; 1395 } 1396 1397 1398 /** 1399 * mbox_post_cmd - issue a mailbox command 1400 * @adapter - controller's soft state 1401 * @scb - command to be issued 1402 * 1403 * post the command to the controller if mailbox is availble. 1404 */ 1405 static inline int 1406 mbox_post_cmd(adapter_t *adapter, scb_t *scb) 1407 { 1408 mraid_device_t *raid_dev = ADAP2RAIDDEV(adapter); 1409 mbox64_t *mbox64; 1410 mbox_t *mbox; 1411 mbox_ccb_t *ccb; 1412 unsigned long flags; 1413 unsigned int i = 0; 1414 1415 1416 ccb = (mbox_ccb_t *)scb->ccb; 1417 mbox = raid_dev->mbox; 1418 mbox64 = raid_dev->mbox64; 1419 1420 /* 1421 * Check for busy mailbox. If it is, return failure - the caller 1422 * should retry later. 1423 */ 1424 spin_lock_irqsave(MAILBOX_LOCK(raid_dev), flags); 1425 1426 if (unlikely(mbox->busy)) { 1427 do { 1428 udelay(1); 1429 i++; 1430 rmb(); 1431 } while(mbox->busy && (i < max_mbox_busy_wait)); 1432 1433 if (mbox->busy) { 1434 1435 spin_unlock_irqrestore(MAILBOX_LOCK(raid_dev), flags); 1436 1437 return -1; 1438 } 1439 } 1440 1441 1442 // Copy this command's mailbox data into "adapter's" mailbox 1443 memcpy((caddr_t)mbox64, (caddr_t)ccb->mbox64, 22); 1444 mbox->cmdid = scb->sno; 1445 1446 adapter->outstanding_cmds++; 1447 1448 if (scb->dma_direction == PCI_DMA_TODEVICE) { 1449 if (!scb->scp->use_sg) { // sg list not used 1450 pci_dma_sync_single_for_device(adapter->pdev, 1451 ccb->buf_dma_h, 1452 scb->scp->request_bufflen, 1453 PCI_DMA_TODEVICE); 1454 } 1455 else { 1456 pci_dma_sync_sg_for_device(adapter->pdev, 1457 scb->scp->request_buffer, 1458 scb->scp->use_sg, PCI_DMA_TODEVICE); 1459 } 1460 } 1461 1462 mbox->busy = 1; // Set busy 1463 mbox->poll = 0; 1464 mbox->ack = 0; 1465 wmb(); 1466 1467 WRINDOOR(raid_dev, raid_dev->mbox_dma | 0x1); 1468 1469 spin_unlock_irqrestore(MAILBOX_LOCK(raid_dev), flags); 1470 1471 return 0; 1472 } 1473 1474 1475 /** 1476 * megaraid_queue_command - generic queue entry point for all LLDs 1477 * @scp : pointer to the scsi command to be executed 1478 * @done : callback routine to be called after the cmd has be completed 1479 * 1480 * Queue entry point for mailbox based controllers. 1481 */ 1482 static int 1483 megaraid_queue_command(struct scsi_cmnd *scp, void (* done)(struct scsi_cmnd *)) 1484 { 1485 adapter_t *adapter; 1486 scb_t *scb; 1487 int if_busy; 1488 1489 adapter = SCP2ADAPTER(scp); 1490 scp->scsi_done = done; 1491 scp->result = 0; 1492 1493 /* 1494 * Allocate and build a SCB request 1495 * if_busy flag will be set if megaraid_mbox_build_cmd() command could 1496 * not allocate scb. We will return non-zero status in that case. 1497 * NOTE: scb can be null even though certain commands completed 1498 * successfully, e.g., MODE_SENSE and TEST_UNIT_READY, it would 1499 * return 0 in that case, and we would do the callback right away. 1500 */ 1501 if_busy = 0; 1502 scb = megaraid_mbox_build_cmd(adapter, scp, &if_busy); 1503 if (!scb) { // command already completed 1504 done(scp); 1505 return 0; 1506 } 1507 1508 megaraid_mbox_runpendq(adapter, scb); 1509 return if_busy; 1510 } 1511 1512 /** 1513 * megaraid_mbox_build_cmd - transform the mid-layer scsi command to megaraid 1514 * firmware lingua 1515 * @adapter - controller's soft state 1516 * @scp - mid-layer scsi command pointer 1517 * @busy - set if request could not be completed because of lack of 1518 * resources 1519 * 1520 * convert the command issued by mid-layer to format understood by megaraid 1521 * firmware. We also complete certain command without sending them to firmware 1522 */ 1523 static scb_t * 1524 megaraid_mbox_build_cmd(adapter_t *adapter, struct scsi_cmnd *scp, int *busy) 1525 { 1526 mraid_device_t *rdev = ADAP2RAIDDEV(adapter); 1527 int channel; 1528 int target; 1529 int islogical; 1530 mbox_ccb_t *ccb; 1531 mraid_passthru_t *pthru; 1532 mbox64_t *mbox64; 1533 mbox_t *mbox; 1534 scb_t *scb; 1535 char skip[] = "skipping"; 1536 char scan[] = "scanning"; 1537 char *ss; 1538 1539 1540 /* 1541 * Get the appropriate device map for the device this command is 1542 * intended for 1543 */ 1544 MRAID_GET_DEVICE_MAP(adapter, scp, channel, target, islogical); 1545 1546 /* 1547 * Logical drive commands 1548 */ 1549 if (islogical) { 1550 switch (scp->cmnd[0]) { 1551 case TEST_UNIT_READY: 1552 /* 1553 * Do we support clustering and is the support enabled 1554 * If no, return success always 1555 */ 1556 if (!adapter->ha) { 1557 scp->result = (DID_OK << 16); 1558 return NULL; 1559 } 1560 1561 if (!(scb = megaraid_alloc_scb(adapter, scp))) { 1562 scp->result = (DID_ERROR << 16); 1563 *busy = 1; 1564 return NULL; 1565 } 1566 1567 scb->dma_direction = scp->sc_data_direction; 1568 scb->dev_channel = 0xFF; 1569 scb->dev_target = target; 1570 ccb = (mbox_ccb_t *)scb->ccb; 1571 1572 /* 1573 * The command id will be provided by the command 1574 * issuance routine 1575 */ 1576 ccb->raw_mbox[0] = CLUSTER_CMD; 1577 ccb->raw_mbox[2] = RESERVATION_STATUS; 1578 ccb->raw_mbox[3] = target; 1579 1580 return scb; 1581 1582 case MODE_SENSE: 1583 if (scp->use_sg) { 1584 struct scatterlist *sgl; 1585 caddr_t vaddr; 1586 1587 sgl = (struct scatterlist *)scp->request_buffer; 1588 if (sgl->page) { 1589 vaddr = (caddr_t) 1590 (page_address((&sgl[0])->page) 1591 + (&sgl[0])->offset); 1592 1593 memset(vaddr, 0, scp->cmnd[4]); 1594 } 1595 else { 1596 con_log(CL_ANN, (KERN_WARNING 1597 "megaraid mailbox: invalid sg:%d\n", 1598 __LINE__)); 1599 } 1600 } 1601 else { 1602 memset(scp->request_buffer, 0, scp->cmnd[4]); 1603 } 1604 scp->result = (DID_OK << 16); 1605 return NULL; 1606 1607 case INQUIRY: 1608 /* 1609 * Display the channel scan for logical drives 1610 * Do not display scan for a channel if already done. 1611 */ 1612 if (!(rdev->last_disp & (1L << SCP2CHANNEL(scp)))) { 1613 1614 con_log(CL_ANN, (KERN_INFO 1615 "scsi[%d]: scanning scsi channel %d", 1616 adapter->host->host_no, 1617 SCP2CHANNEL(scp))); 1618 1619 con_log(CL_ANN, ( 1620 " [virtual] for logical drives\n")); 1621 1622 rdev->last_disp |= (1L << SCP2CHANNEL(scp)); 1623 } 1624 1625 /* Fall through */ 1626 1627 case READ_CAPACITY: 1628 /* 1629 * Do not allow LUN > 0 for logical drives and 1630 * requests for more than 40 logical drives 1631 */ 1632 if (SCP2LUN(scp)) { 1633 scp->result = (DID_BAD_TARGET << 16); 1634 return NULL; 1635 } 1636 if ((target % 0x80) >= MAX_LOGICAL_DRIVES_40LD) { 1637 scp->result = (DID_BAD_TARGET << 16); 1638 return NULL; 1639 } 1640 1641 1642 /* Allocate a SCB and initialize passthru */ 1643 if (!(scb = megaraid_alloc_scb(adapter, scp))) { 1644 scp->result = (DID_ERROR << 16); 1645 *busy = 1; 1646 return NULL; 1647 } 1648 1649 ccb = (mbox_ccb_t *)scb->ccb; 1650 scb->dev_channel = 0xFF; 1651 scb->dev_target = target; 1652 pthru = ccb->pthru; 1653 mbox = ccb->mbox; 1654 mbox64 = ccb->mbox64; 1655 1656 pthru->timeout = 0; 1657 pthru->ars = 1; 1658 pthru->reqsenselen = 14; 1659 pthru->islogical = 1; 1660 pthru->logdrv = target; 1661 pthru->cdblen = scp->cmd_len; 1662 memcpy(pthru->cdb, scp->cmnd, scp->cmd_len); 1663 1664 mbox->cmd = MBOXCMD_PASSTHRU64; 1665 scb->dma_direction = scp->sc_data_direction; 1666 1667 pthru->dataxferlen = scp->request_bufflen; 1668 pthru->dataxferaddr = ccb->sgl_dma_h; 1669 pthru->numsge = megaraid_mbox_mksgl(adapter, 1670 scb); 1671 1672 mbox->xferaddr = 0xFFFFFFFF; 1673 mbox64->xferaddr_lo = (uint32_t )ccb->pthru_dma_h; 1674 mbox64->xferaddr_hi = 0; 1675 1676 return scb; 1677 1678 case READ_6: 1679 case WRITE_6: 1680 case READ_10: 1681 case WRITE_10: 1682 case READ_12: 1683 case WRITE_12: 1684 1685 /* 1686 * Allocate a SCB and initialize mailbox 1687 */ 1688 if (!(scb = megaraid_alloc_scb(adapter, scp))) { 1689 scp->result = (DID_ERROR << 16); 1690 *busy = 1; 1691 return NULL; 1692 } 1693 ccb = (mbox_ccb_t *)scb->ccb; 1694 scb->dev_channel = 0xFF; 1695 scb->dev_target = target; 1696 mbox = ccb->mbox; 1697 mbox64 = ccb->mbox64; 1698 mbox->logdrv = target; 1699 1700 /* 1701 * A little HACK: 2nd bit is zero for all scsi read 1702 * commands and is set for all scsi write commands 1703 */ 1704 mbox->cmd = (scp->cmnd[0] & 0x02) ? MBOXCMD_LWRITE64: 1705 MBOXCMD_LREAD64 ; 1706 1707 /* 1708 * 6-byte READ(0x08) or WRITE(0x0A) cdb 1709 */ 1710 if (scp->cmd_len == 6) { 1711 mbox->numsectors = (uint32_t)scp->cmnd[4]; 1712 mbox->lba = 1713 ((uint32_t)scp->cmnd[1] << 16) | 1714 ((uint32_t)scp->cmnd[2] << 8) | 1715 (uint32_t)scp->cmnd[3]; 1716 1717 mbox->lba &= 0x1FFFFF; 1718 } 1719 1720 /* 1721 * 10-byte READ(0x28) or WRITE(0x2A) cdb 1722 */ 1723 else if (scp->cmd_len == 10) { 1724 mbox->numsectors = 1725 (uint32_t)scp->cmnd[8] | 1726 ((uint32_t)scp->cmnd[7] << 8); 1727 mbox->lba = 1728 ((uint32_t)scp->cmnd[2] << 24) | 1729 ((uint32_t)scp->cmnd[3] << 16) | 1730 ((uint32_t)scp->cmnd[4] << 8) | 1731 (uint32_t)scp->cmnd[5]; 1732 } 1733 1734 /* 1735 * 12-byte READ(0xA8) or WRITE(0xAA) cdb 1736 */ 1737 else if (scp->cmd_len == 12) { 1738 mbox->lba = 1739 ((uint32_t)scp->cmnd[2] << 24) | 1740 ((uint32_t)scp->cmnd[3] << 16) | 1741 ((uint32_t)scp->cmnd[4] << 8) | 1742 (uint32_t)scp->cmnd[5]; 1743 1744 mbox->numsectors = 1745 ((uint32_t)scp->cmnd[6] << 24) | 1746 ((uint32_t)scp->cmnd[7] << 16) | 1747 ((uint32_t)scp->cmnd[8] << 8) | 1748 (uint32_t)scp->cmnd[9]; 1749 } 1750 else { 1751 con_log(CL_ANN, (KERN_WARNING 1752 "megaraid: unsupported CDB length\n")); 1753 1754 megaraid_dealloc_scb(adapter, scb); 1755 1756 scp->result = (DID_ERROR << 16); 1757 return NULL; 1758 } 1759 1760 scb->dma_direction = scp->sc_data_direction; 1761 1762 // Calculate Scatter-Gather info 1763 mbox64->xferaddr_lo = (uint32_t )ccb->sgl_dma_h; 1764 mbox->numsge = megaraid_mbox_mksgl(adapter, 1765 scb); 1766 mbox->xferaddr = 0xFFFFFFFF; 1767 mbox64->xferaddr_hi = 0; 1768 1769 return scb; 1770 1771 case RESERVE: 1772 case RELEASE: 1773 /* 1774 * Do we support clustering and is the support enabled 1775 */ 1776 if (!adapter->ha) { 1777 scp->result = (DID_BAD_TARGET << 16); 1778 return NULL; 1779 } 1780 1781 /* 1782 * Allocate a SCB and initialize mailbox 1783 */ 1784 if (!(scb = megaraid_alloc_scb(adapter, scp))) { 1785 scp->result = (DID_ERROR << 16); 1786 *busy = 1; 1787 return NULL; 1788 } 1789 1790 ccb = (mbox_ccb_t *)scb->ccb; 1791 scb->dev_channel = 0xFF; 1792 scb->dev_target = target; 1793 ccb->raw_mbox[0] = CLUSTER_CMD; 1794 ccb->raw_mbox[2] = (scp->cmnd[0] == RESERVE) ? 1795 RESERVE_LD : RELEASE_LD; 1796 1797 ccb->raw_mbox[3] = target; 1798 scb->dma_direction = scp->sc_data_direction; 1799 1800 return scb; 1801 1802 default: 1803 scp->result = (DID_BAD_TARGET << 16); 1804 return NULL; 1805 } 1806 } 1807 else { // Passthru device commands 1808 1809 // Do not allow access to target id > 15 or LUN > 7 1810 if (target > 15 || SCP2LUN(scp) > 7) { 1811 scp->result = (DID_BAD_TARGET << 16); 1812 return NULL; 1813 } 1814 1815 // if fast load option was set and scan for last device is 1816 // over, reset the fast_load flag so that during a possible 1817 // next scan, devices can be made available 1818 if (rdev->fast_load && (target == 15) && 1819 (SCP2CHANNEL(scp) == adapter->max_channel -1)) { 1820 1821 con_log(CL_ANN, (KERN_INFO 1822 "megaraid[%d]: physical device scan re-enabled\n", 1823 adapter->host->host_no)); 1824 rdev->fast_load = 0; 1825 } 1826 1827 /* 1828 * Display the channel scan for physical devices 1829 */ 1830 if (!(rdev->last_disp & (1L << SCP2CHANNEL(scp)))) { 1831 1832 ss = rdev->fast_load ? skip : scan; 1833 1834 con_log(CL_ANN, (KERN_INFO 1835 "scsi[%d]: %s scsi channel %d [Phy %d]", 1836 adapter->host->host_no, ss, SCP2CHANNEL(scp), 1837 channel)); 1838 1839 con_log(CL_ANN, ( 1840 " for non-raid devices\n")); 1841 1842 rdev->last_disp |= (1L << SCP2CHANNEL(scp)); 1843 } 1844 1845 // disable channel sweep if fast load option given 1846 if (rdev->fast_load) { 1847 scp->result = (DID_BAD_TARGET << 16); 1848 return NULL; 1849 } 1850 1851 // Allocate a SCB and initialize passthru 1852 if (!(scb = megaraid_alloc_scb(adapter, scp))) { 1853 scp->result = (DID_ERROR << 16); 1854 *busy = 1; 1855 return NULL; 1856 } 1857 1858 ccb = (mbox_ccb_t *)scb->ccb; 1859 scb->dev_channel = channel; 1860 scb->dev_target = target; 1861 scb->dma_direction = scp->sc_data_direction; 1862 mbox = ccb->mbox; 1863 mbox64 = ccb->mbox64; 1864 1865 // Does this firmware support extended CDBs 1866 if (adapter->max_cdb_sz == 16) { 1867 mbox->cmd = MBOXCMD_EXTPTHRU; 1868 1869 megaraid_mbox_prepare_epthru(adapter, scb, scp); 1870 1871 mbox64->xferaddr_lo = (uint32_t)ccb->epthru_dma_h; 1872 mbox64->xferaddr_hi = 0; 1873 mbox->xferaddr = 0xFFFFFFFF; 1874 } 1875 else { 1876 mbox->cmd = MBOXCMD_PASSTHRU64; 1877 1878 megaraid_mbox_prepare_pthru(adapter, scb, scp); 1879 1880 mbox64->xferaddr_lo = (uint32_t)ccb->pthru_dma_h; 1881 mbox64->xferaddr_hi = 0; 1882 mbox->xferaddr = 0xFFFFFFFF; 1883 } 1884 return scb; 1885 } 1886 1887 // NOT REACHED 1888 } 1889 1890 1891 /** 1892 * megaraid_mbox_runpendq - execute commands queued in the pending queue 1893 * @adapter : controller's soft state 1894 * @scb : SCB to be queued in the pending list 1895 * 1896 * scan the pending list for commands which are not yet issued and try to 1897 * post to the controller. The SCB can be a null pointer, which would indicate 1898 * no SCB to be queue, just try to execute the ones in the pending list. 1899 * 1900 * NOTE: We do not actually traverse the pending list. The SCBs are plucked 1901 * out from the head of the pending list. If it is successfully issued, the 1902 * next SCB is at the head now. 1903 */ 1904 static void 1905 megaraid_mbox_runpendq(adapter_t *adapter, scb_t *scb_q) 1906 { 1907 scb_t *scb; 1908 unsigned long flags; 1909 1910 spin_lock_irqsave(PENDING_LIST_LOCK(adapter), flags); 1911 1912 if (scb_q) { 1913 scb_q->state = SCB_PENDQ; 1914 list_add_tail(&scb_q->list, &adapter->pend_list); 1915 } 1916 1917 // if the adapter in not in quiescent mode, post the commands to FW 1918 if (adapter->quiescent) { 1919 spin_unlock_irqrestore(PENDING_LIST_LOCK(adapter), flags); 1920 return; 1921 } 1922 1923 while (!list_empty(&adapter->pend_list)) { 1924 1925 assert_spin_locked(PENDING_LIST_LOCK(adapter)); 1926 1927 scb = list_entry(adapter->pend_list.next, scb_t, list); 1928 1929 // remove the scb from the pending list and try to 1930 // issue. If we are unable to issue it, put back in 1931 // the pending list and return 1932 1933 list_del_init(&scb->list); 1934 1935 spin_unlock_irqrestore(PENDING_LIST_LOCK(adapter), flags); 1936 1937 // if mailbox was busy, return SCB back to pending 1938 // list. Make sure to add at the head, since that's 1939 // where it would have been removed from 1940 1941 scb->state = SCB_ISSUED; 1942 1943 if (mbox_post_cmd(adapter, scb) != 0) { 1944 1945 spin_lock_irqsave(PENDING_LIST_LOCK(adapter), flags); 1946 1947 scb->state = SCB_PENDQ; 1948 1949 list_add(&scb->list, &adapter->pend_list); 1950 1951 spin_unlock_irqrestore(PENDING_LIST_LOCK(adapter), 1952 flags); 1953 1954 return; 1955 } 1956 1957 spin_lock_irqsave(PENDING_LIST_LOCK(adapter), flags); 1958 } 1959 1960 spin_unlock_irqrestore(PENDING_LIST_LOCK(adapter), flags); 1961 1962 1963 return; 1964 } 1965 1966 1967 /** 1968 * megaraid_mbox_prepare_pthru - prepare a command for physical devices 1969 * @adapter - pointer to controller's soft state 1970 * @scb - scsi control block 1971 * @scp - scsi command from the mid-layer 1972 * 1973 * prepare a command for the scsi physical devices 1974 */ 1975 static void 1976 megaraid_mbox_prepare_pthru(adapter_t *adapter, scb_t *scb, 1977 struct scsi_cmnd *scp) 1978 { 1979 mbox_ccb_t *ccb; 1980 mraid_passthru_t *pthru; 1981 uint8_t channel; 1982 uint8_t target; 1983 1984 ccb = (mbox_ccb_t *)scb->ccb; 1985 pthru = ccb->pthru; 1986 channel = scb->dev_channel; 1987 target = scb->dev_target; 1988 1989 // 0=6sec, 1=60sec, 2=10min, 3=3hrs, 4=NO timeout 1990 pthru->timeout = 4; 1991 pthru->ars = 1; 1992 pthru->islogical = 0; 1993 pthru->channel = 0; 1994 pthru->target = (channel << 4) | target; 1995 pthru->logdrv = SCP2LUN(scp); 1996 pthru->reqsenselen = 14; 1997 pthru->cdblen = scp->cmd_len; 1998 1999 memcpy(pthru->cdb, scp->cmnd, scp->cmd_len); 2000 2001 if (scp->request_bufflen) { 2002 pthru->dataxferlen = scp->request_bufflen; 2003 pthru->dataxferaddr = ccb->sgl_dma_h; 2004 pthru->numsge = megaraid_mbox_mksgl(adapter, scb); 2005 } 2006 else { 2007 pthru->dataxferaddr = 0; 2008 pthru->dataxferlen = 0; 2009 pthru->numsge = 0; 2010 } 2011 return; 2012 } 2013 2014 2015 /** 2016 * megaraid_mbox_prepare_epthru - prepare a command for physical devices 2017 * @adapter - pointer to controller's soft state 2018 * @scb - scsi control block 2019 * @scp - scsi command from the mid-layer 2020 * 2021 * prepare a command for the scsi physical devices. This rountine prepares 2022 * commands for devices which can take extended CDBs (>10 bytes) 2023 */ 2024 static void 2025 megaraid_mbox_prepare_epthru(adapter_t *adapter, scb_t *scb, 2026 struct scsi_cmnd *scp) 2027 { 2028 mbox_ccb_t *ccb; 2029 mraid_epassthru_t *epthru; 2030 uint8_t channel; 2031 uint8_t target; 2032 2033 ccb = (mbox_ccb_t *)scb->ccb; 2034 epthru = ccb->epthru; 2035 channel = scb->dev_channel; 2036 target = scb->dev_target; 2037 2038 // 0=6sec, 1=60sec, 2=10min, 3=3hrs, 4=NO timeout 2039 epthru->timeout = 4; 2040 epthru->ars = 1; 2041 epthru->islogical = 0; 2042 epthru->channel = 0; 2043 epthru->target = (channel << 4) | target; 2044 epthru->logdrv = SCP2LUN(scp); 2045 epthru->reqsenselen = 14; 2046 epthru->cdblen = scp->cmd_len; 2047 2048 memcpy(epthru->cdb, scp->cmnd, scp->cmd_len); 2049 2050 if (scp->request_bufflen) { 2051 epthru->dataxferlen = scp->request_bufflen; 2052 epthru->dataxferaddr = ccb->sgl_dma_h; 2053 epthru->numsge = megaraid_mbox_mksgl(adapter, scb); 2054 } 2055 else { 2056 epthru->dataxferaddr = 0; 2057 epthru->dataxferlen = 0; 2058 epthru->numsge = 0; 2059 } 2060 return; 2061 } 2062 2063 2064 /** 2065 * megaraid_ack_sequence - interrupt ack sequence for memory mapped HBAs 2066 * @adapter - controller's soft state 2067 * 2068 * Interrupt ackrowledgement sequence for memory mapped HBAs. Find out the 2069 * completed command and put them on the completed list for later processing. 2070 * 2071 * Returns: 1 if the interrupt is valid, 0 otherwise 2072 */ 2073 static inline int 2074 megaraid_ack_sequence(adapter_t *adapter) 2075 { 2076 mraid_device_t *raid_dev = ADAP2RAIDDEV(adapter); 2077 mbox_t *mbox; 2078 scb_t *scb; 2079 uint8_t nstatus; 2080 uint8_t completed[MBOX_MAX_FIRMWARE_STATUS]; 2081 struct list_head clist; 2082 int handled; 2083 uint32_t dword; 2084 unsigned long flags; 2085 int i, j; 2086 2087 2088 mbox = raid_dev->mbox; 2089 2090 // move the SCBs from the firmware completed array to our local list 2091 INIT_LIST_HEAD(&clist); 2092 2093 // loop till F/W has more commands for us to complete 2094 handled = 0; 2095 spin_lock_irqsave(MAILBOX_LOCK(raid_dev), flags); 2096 do { 2097 /* 2098 * Check if a valid interrupt is pending. If found, force the 2099 * interrupt line low. 2100 */ 2101 dword = RDOUTDOOR(raid_dev); 2102 if (dword != 0x10001234) break; 2103 2104 handled = 1; 2105 2106 WROUTDOOR(raid_dev, 0x10001234); 2107 2108 nstatus = 0; 2109 // wait for valid numstatus to post 2110 for (i = 0; i < 0xFFFFF; i++) { 2111 if (mbox->numstatus != 0xFF) { 2112 nstatus = mbox->numstatus; 2113 break; 2114 } 2115 rmb(); 2116 } 2117 mbox->numstatus = 0xFF; 2118 2119 adapter->outstanding_cmds -= nstatus; 2120 2121 for (i = 0; i < nstatus; i++) { 2122 2123 // wait for valid command index to post 2124 for (j = 0; j < 0xFFFFF; j++) { 2125 if (mbox->completed[i] != 0xFF) break; 2126 rmb(); 2127 } 2128 completed[i] = mbox->completed[i]; 2129 mbox->completed[i] = 0xFF; 2130 2131 if (completed[i] == 0xFF) { 2132 con_log(CL_ANN, (KERN_CRIT 2133 "megaraid: command posting timed out\n")); 2134 2135 BUG(); 2136 continue; 2137 } 2138 2139 // Get SCB associated with this command id 2140 if (completed[i] >= MBOX_MAX_SCSI_CMDS) { 2141 // a cmm command 2142 scb = adapter->uscb_list + (completed[i] - 2143 MBOX_MAX_SCSI_CMDS); 2144 } 2145 else { 2146 // an os command 2147 scb = adapter->kscb_list + completed[i]; 2148 } 2149 2150 scb->status = mbox->status; 2151 list_add_tail(&scb->list, &clist); 2152 } 2153 2154 // Acknowledge interrupt 2155 WRINDOOR(raid_dev, 0x02); 2156 2157 } while(1); 2158 2159 spin_unlock_irqrestore(MAILBOX_LOCK(raid_dev), flags); 2160 2161 2162 // put the completed commands in the completed list. DPC would 2163 // complete these commands later 2164 spin_lock_irqsave(COMPLETED_LIST_LOCK(adapter), flags); 2165 2166 list_splice(&clist, &adapter->completed_list); 2167 2168 spin_unlock_irqrestore(COMPLETED_LIST_LOCK(adapter), flags); 2169 2170 2171 // schedule the DPC if there is some work for it 2172 if (handled) 2173 tasklet_schedule(&adapter->dpc_h); 2174 2175 return handled; 2176 } 2177 2178 2179 /** 2180 * megaraid_isr - isr for memory based mailbox based controllers 2181 * @irq - irq 2182 * @devp - pointer to our soft state 2183 * @regs - unused 2184 * 2185 * Interrupt service routine for memory-mapped mailbox controllers. 2186 */ 2187 static irqreturn_t 2188 megaraid_isr(int irq, void *devp, struct pt_regs *regs) 2189 { 2190 adapter_t *adapter = devp; 2191 int handled; 2192 2193 handled = megaraid_ack_sequence(adapter); 2194 2195 /* Loop through any pending requests */ 2196 if (!adapter->quiescent) { 2197 megaraid_mbox_runpendq(adapter, NULL); 2198 } 2199 2200 return IRQ_RETVAL(handled); 2201 } 2202 2203 2204 /** 2205 * megaraid_mbox_sync_scb - sync kernel buffers 2206 * @adapter : controller's soft state 2207 * @scb : pointer to the resource packet 2208 * 2209 * DMA sync if required. 2210 */ 2211 static inline void 2212 megaraid_mbox_sync_scb(adapter_t *adapter, scb_t *scb) 2213 { 2214 mbox_ccb_t *ccb; 2215 2216 ccb = (mbox_ccb_t *)scb->ccb; 2217 2218 switch (scb->dma_type) { 2219 2220 case MRAID_DMA_WBUF: 2221 if (scb->dma_direction == PCI_DMA_FROMDEVICE) { 2222 pci_dma_sync_single_for_cpu(adapter->pdev, 2223 ccb->buf_dma_h, 2224 scb->scp->request_bufflen, 2225 PCI_DMA_FROMDEVICE); 2226 } 2227 2228 pci_unmap_page(adapter->pdev, ccb->buf_dma_h, 2229 scb->scp->request_bufflen, scb->dma_direction); 2230 2231 break; 2232 2233 case MRAID_DMA_WSG: 2234 if (scb->dma_direction == PCI_DMA_FROMDEVICE) { 2235 pci_dma_sync_sg_for_cpu(adapter->pdev, 2236 scb->scp->request_buffer, 2237 scb->scp->use_sg, PCI_DMA_FROMDEVICE); 2238 } 2239 2240 pci_unmap_sg(adapter->pdev, scb->scp->request_buffer, 2241 scb->scp->use_sg, scb->dma_direction); 2242 2243 break; 2244 2245 default: 2246 break; 2247 } 2248 2249 return; 2250 } 2251 2252 2253 /** 2254 * megaraid_mbox_dpc - the tasklet to complete the commands from completed list 2255 * @devp : pointer to HBA soft state 2256 * 2257 * Pick up the commands from the completed list and send back to the owners. 2258 * This is a reentrant function and does not assume any locks are held while 2259 * it is being called. 2260 */ 2261 static void 2262 megaraid_mbox_dpc(unsigned long devp) 2263 { 2264 adapter_t *adapter = (adapter_t *)devp; 2265 mraid_device_t *raid_dev; 2266 struct list_head clist; 2267 struct scatterlist *sgl; 2268 scb_t *scb; 2269 scb_t *tmp; 2270 struct scsi_cmnd *scp; 2271 mraid_passthru_t *pthru; 2272 mraid_epassthru_t *epthru; 2273 mbox_ccb_t *ccb; 2274 int islogical; 2275 int pdev_index; 2276 int pdev_state; 2277 mbox_t *mbox; 2278 unsigned long flags; 2279 uint8_t c; 2280 int status; 2281 2282 2283 if (!adapter) return; 2284 2285 raid_dev = ADAP2RAIDDEV(adapter); 2286 2287 // move the SCBs from the completed list to our local list 2288 INIT_LIST_HEAD(&clist); 2289 2290 spin_lock_irqsave(COMPLETED_LIST_LOCK(adapter), flags); 2291 2292 list_splice_init(&adapter->completed_list, &clist); 2293 2294 spin_unlock_irqrestore(COMPLETED_LIST_LOCK(adapter), flags); 2295 2296 2297 list_for_each_entry_safe(scb, tmp, &clist, list) { 2298 2299 status = scb->status; 2300 scp = scb->scp; 2301 ccb = (mbox_ccb_t *)scb->ccb; 2302 pthru = ccb->pthru; 2303 epthru = ccb->epthru; 2304 mbox = ccb->mbox; 2305 2306 // Make sure f/w has completed a valid command 2307 if (scb->state != SCB_ISSUED) { 2308 con_log(CL_ANN, (KERN_CRIT 2309 "megaraid critical err: invalid command %d:%d:%p\n", 2310 scb->sno, scb->state, scp)); 2311 BUG(); 2312 continue; // Must never happen! 2313 } 2314 2315 // check for the management command and complete it right away 2316 if (scb->sno >= MBOX_MAX_SCSI_CMDS) { 2317 scb->state = SCB_FREE; 2318 scb->status = status; 2319 2320 // remove from local clist 2321 list_del_init(&scb->list); 2322 2323 megaraid_mbox_mm_done(adapter, scb); 2324 2325 continue; 2326 } 2327 2328 // Was an abort issued for this command earlier 2329 if (scb->state & SCB_ABORT) { 2330 con_log(CL_ANN, (KERN_NOTICE 2331 "megaraid: aborted cmd %lx[%x] completed\n", 2332 scp->serial_number, scb->sno)); 2333 } 2334 2335 /* 2336 * If the inquiry came of a disk drive which is not part of 2337 * any RAID array, expose it to the kernel. For this to be 2338 * enabled, user must set the "megaraid_expose_unconf_disks" 2339 * flag to 1 by specifying it on module parameter list. 2340 * This would enable data migration off drives from other 2341 * configurations. 2342 */ 2343 islogical = MRAID_IS_LOGICAL(adapter, scp); 2344 if (scp->cmnd[0] == INQUIRY && status == 0 && islogical == 0 2345 && IS_RAID_CH(raid_dev, scb->dev_channel)) { 2346 2347 if (scp->use_sg) { 2348 sgl = (struct scatterlist *) 2349 scp->request_buffer; 2350 2351 if (sgl->page) { 2352 c = *(unsigned char *) 2353 (page_address((&sgl[0])->page) + 2354 (&sgl[0])->offset); 2355 } 2356 else { 2357 con_log(CL_ANN, (KERN_WARNING 2358 "megaraid mailbox: invalid sg:%d\n", 2359 __LINE__)); 2360 c = 0; 2361 } 2362 } 2363 else { 2364 c = *(uint8_t *)scp->request_buffer; 2365 } 2366 2367 if ((c & 0x1F ) == TYPE_DISK) { 2368 pdev_index = (scb->dev_channel * 16) + 2369 scb->dev_target; 2370 pdev_state = 2371 raid_dev->pdrv_state[pdev_index] & 0x0F; 2372 2373 if (pdev_state == PDRV_ONLINE || 2374 pdev_state == PDRV_FAILED || 2375 pdev_state == PDRV_RBLD || 2376 pdev_state == PDRV_HOTSPARE || 2377 megaraid_expose_unconf_disks == 0) { 2378 2379 status = 0xF0; 2380 } 2381 } 2382 } 2383 2384 // Convert MegaRAID status to Linux error code 2385 switch (status) { 2386 2387 case 0x00: 2388 2389 scp->result = (DID_OK << 16); 2390 break; 2391 2392 case 0x02: 2393 2394 /* set sense_buffer and result fields */ 2395 if (mbox->cmd == MBOXCMD_PASSTHRU || 2396 mbox->cmd == MBOXCMD_PASSTHRU64) { 2397 2398 memcpy(scp->sense_buffer, pthru->reqsensearea, 2399 14); 2400 2401 scp->result = DRIVER_SENSE << 24 | 2402 DID_OK << 16 | CHECK_CONDITION << 1; 2403 } 2404 else { 2405 if (mbox->cmd == MBOXCMD_EXTPTHRU) { 2406 2407 memcpy(scp->sense_buffer, 2408 epthru->reqsensearea, 14); 2409 2410 scp->result = DRIVER_SENSE << 24 | 2411 DID_OK << 16 | 2412 CHECK_CONDITION << 1; 2413 } else { 2414 scp->sense_buffer[0] = 0x70; 2415 scp->sense_buffer[2] = ABORTED_COMMAND; 2416 scp->result = CHECK_CONDITION << 1; 2417 } 2418 } 2419 break; 2420 2421 case 0x08: 2422 2423 scp->result = DID_BUS_BUSY << 16 | status; 2424 break; 2425 2426 default: 2427 2428 /* 2429 * If TEST_UNIT_READY fails, we know RESERVATION_STATUS 2430 * failed 2431 */ 2432 if (scp->cmnd[0] == TEST_UNIT_READY) { 2433 scp->result = DID_ERROR << 16 | 2434 RESERVATION_CONFLICT << 1; 2435 } 2436 else 2437 /* 2438 * Error code returned is 1 if Reserve or Release 2439 * failed or the input parameter is invalid 2440 */ 2441 if (status == 1 && (scp->cmnd[0] == RESERVE || 2442 scp->cmnd[0] == RELEASE)) { 2443 2444 scp->result = DID_ERROR << 16 | 2445 RESERVATION_CONFLICT << 1; 2446 } 2447 else { 2448 scp->result = DID_BAD_TARGET << 16 | status; 2449 } 2450 } 2451 2452 // print a debug message for all failed commands 2453 if (status) { 2454 megaraid_mbox_display_scb(adapter, scb); 2455 } 2456 2457 // Free our internal resources and call the mid-layer callback 2458 // routine 2459 megaraid_mbox_sync_scb(adapter, scb); 2460 2461 // remove from local clist 2462 list_del_init(&scb->list); 2463 2464 // put back in free list 2465 megaraid_dealloc_scb(adapter, scb); 2466 2467 // send the scsi packet back to kernel 2468 scp->scsi_done(scp); 2469 } 2470 2471 return; 2472 } 2473 2474 2475 /** 2476 * megaraid_abort_handler - abort the scsi command 2477 * @scp : command to be aborted 2478 * 2479 * Abort a previous SCSI request. Only commands on the pending list can be 2480 * aborted. All the commands issued to the F/W must complete. 2481 **/ 2482 static int 2483 megaraid_abort_handler(struct scsi_cmnd *scp) 2484 { 2485 adapter_t *adapter; 2486 mraid_device_t *raid_dev; 2487 scb_t *scb; 2488 scb_t *tmp; 2489 int found; 2490 unsigned long flags; 2491 int i; 2492 2493 2494 adapter = SCP2ADAPTER(scp); 2495 raid_dev = ADAP2RAIDDEV(adapter); 2496 2497 con_log(CL_ANN, (KERN_WARNING 2498 "megaraid: aborting-%ld cmd=%x <c=%d t=%d l=%d>\n", 2499 scp->serial_number, scp->cmnd[0], SCP2CHANNEL(scp), 2500 SCP2TARGET(scp), SCP2LUN(scp))); 2501 2502 // If FW has stopped responding, simply return failure 2503 if (raid_dev->hw_error) { 2504 con_log(CL_ANN, (KERN_NOTICE 2505 "megaraid: hw error, not aborting\n")); 2506 return FAILED; 2507 } 2508 2509 // There might a race here, where the command was completed by the 2510 // firmware and now it is on the completed list. Before we could 2511 // complete the command to the kernel in dpc, the abort came. 2512 // Find out if this is the case to avoid the race. 2513 scb = NULL; 2514 spin_lock_irqsave(COMPLETED_LIST_LOCK(adapter), flags); 2515 list_for_each_entry_safe(scb, tmp, &adapter->completed_list, list) { 2516 2517 if (scb->scp == scp) { // Found command 2518 2519 list_del_init(&scb->list); // from completed list 2520 2521 con_log(CL_ANN, (KERN_WARNING 2522 "megaraid: %ld:%d[%d:%d], abort from completed list\n", 2523 scp->serial_number, scb->sno, 2524 scb->dev_channel, scb->dev_target)); 2525 2526 scp->result = (DID_ABORT << 16); 2527 scp->scsi_done(scp); 2528 2529 megaraid_dealloc_scb(adapter, scb); 2530 2531 spin_unlock_irqrestore(COMPLETED_LIST_LOCK(adapter), 2532 flags); 2533 2534 return SUCCESS; 2535 } 2536 } 2537 spin_unlock_irqrestore(COMPLETED_LIST_LOCK(adapter), flags); 2538 2539 2540 // Find out if this command is still on the pending list. If it is and 2541 // was never issued, abort and return success. If the command is owned 2542 // by the firmware, we must wait for it to complete by the FW. 2543 spin_lock_irqsave(PENDING_LIST_LOCK(adapter), flags); 2544 list_for_each_entry_safe(scb, tmp, &adapter->pend_list, list) { 2545 2546 if (scb->scp == scp) { // Found command 2547 2548 list_del_init(&scb->list); // from pending list 2549 2550 ASSERT(!(scb->state & SCB_ISSUED)); 2551 2552 con_log(CL_ANN, (KERN_WARNING 2553 "megaraid abort: %ld[%d:%d], driver owner\n", 2554 scp->serial_number, scb->dev_channel, 2555 scb->dev_target)); 2556 2557 scp->result = (DID_ABORT << 16); 2558 scp->scsi_done(scp); 2559 2560 megaraid_dealloc_scb(adapter, scb); 2561 2562 spin_unlock_irqrestore(PENDING_LIST_LOCK(adapter), 2563 flags); 2564 2565 return SUCCESS; 2566 } 2567 } 2568 spin_unlock_irqrestore(PENDING_LIST_LOCK(adapter), flags); 2569 2570 2571 // Check do we even own this command, in which case this would be 2572 // owned by the firmware. The only way to locate the FW scb is to 2573 // traverse through the list of all SCB, since driver does not 2574 // maintain these SCBs on any list 2575 found = 0; 2576 spin_lock_irq(&adapter->lock); 2577 for (i = 0; i < MBOX_MAX_SCSI_CMDS; i++) { 2578 scb = adapter->kscb_list + i; 2579 2580 if (scb->scp == scp) { 2581 2582 found = 1; 2583 2584 if (!(scb->state & SCB_ISSUED)) { 2585 con_log(CL_ANN, (KERN_WARNING 2586 "megaraid abort: %ld%d[%d:%d], invalid state\n", 2587 scp->serial_number, scb->sno, scb->dev_channel, 2588 scb->dev_target)); 2589 BUG(); 2590 } 2591 else { 2592 con_log(CL_ANN, (KERN_WARNING 2593 "megaraid abort: %ld:%d[%d:%d], fw owner\n", 2594 scp->serial_number, scb->sno, scb->dev_channel, 2595 scb->dev_target)); 2596 } 2597 } 2598 } 2599 spin_unlock_irq(&adapter->lock); 2600 2601 if (!found) { 2602 con_log(CL_ANN, (KERN_WARNING 2603 "megaraid abort: scsi cmd:%ld, do now own\n", 2604 scp->serial_number)); 2605 2606 // FIXME: Should there be a callback for this command? 2607 return SUCCESS; 2608 } 2609 2610 // We cannot actually abort a command owned by firmware, return 2611 // failure and wait for reset. In host reset handler, we will find out 2612 // if the HBA is still live 2613 return FAILED; 2614 } 2615 2616 /** 2617 * megaraid_reset_handler - device reset hadler for mailbox based driver 2618 * @scp : reference command 2619 * 2620 * Reset handler for the mailbox based controller. First try to find out if 2621 * the FW is still live, in which case the outstanding commands counter mut go 2622 * down to 0. If that happens, also issue the reservation reset command to 2623 * relinquish (possible) reservations on the logical drives connected to this 2624 * host 2625 **/ 2626 static int 2627 megaraid_reset_handler(struct scsi_cmnd *scp) 2628 { 2629 adapter_t *adapter; 2630 scb_t *scb; 2631 scb_t *tmp; 2632 mraid_device_t *raid_dev; 2633 unsigned long flags; 2634 uint8_t raw_mbox[sizeof(mbox_t)]; 2635 int rval; 2636 int recovery_window; 2637 int recovering; 2638 int i; 2639 2640 adapter = SCP2ADAPTER(scp); 2641 raid_dev = ADAP2RAIDDEV(adapter); 2642 2643 // return failure if adapter is not responding 2644 if (raid_dev->hw_error) { 2645 con_log(CL_ANN, (KERN_NOTICE 2646 "megaraid: hw error, cannot reset\n")); 2647 return FAILED; 2648 } 2649 2650 2651 // Under exceptional conditions, FW can take up to 3 minutes to 2652 // complete command processing. Wait for additional 2 minutes for the 2653 // pending commands counter to go down to 0. If it doesn't, let the 2654 // controller be marked offline 2655 // Also, reset all the commands currently owned by the driver 2656 spin_lock_irqsave(PENDING_LIST_LOCK(adapter), flags); 2657 list_for_each_entry_safe(scb, tmp, &adapter->pend_list, list) { 2658 2659 list_del_init(&scb->list); // from pending list 2660 2661 con_log(CL_ANN, (KERN_WARNING 2662 "megaraid: %ld:%d[%d:%d], reset from pending list\n", 2663 scp->serial_number, scb->sno, 2664 scb->dev_channel, scb->dev_target)); 2665 2666 scp->result = (DID_RESET << 16); 2667 scp->scsi_done(scp); 2668 2669 megaraid_dealloc_scb(adapter, scb); 2670 } 2671 spin_unlock_irqrestore(PENDING_LIST_LOCK(adapter), flags); 2672 2673 if (adapter->outstanding_cmds) { 2674 con_log(CL_ANN, (KERN_NOTICE 2675 "megaraid: %d outstanding commands. Max wait %d sec\n", 2676 adapter->outstanding_cmds, MBOX_RESET_WAIT)); 2677 } 2678 2679 recovery_window = MBOX_RESET_WAIT + MBOX_RESET_EXT_WAIT; 2680 2681 recovering = adapter->outstanding_cmds; 2682 2683 for (i = 0; i < recovery_window && adapter->outstanding_cmds; i++) { 2684 2685 megaraid_ack_sequence(adapter); 2686 2687 // print a message once every 5 seconds only 2688 if (!(i % 5)) { 2689 con_log(CL_ANN, ( 2690 "megaraid mbox: Wait for %d commands to complete:%d\n", 2691 adapter->outstanding_cmds, 2692 MBOX_RESET_WAIT - i)); 2693 } 2694 2695 // bailout if no recovery happended in reset time 2696 if ((i == MBOX_RESET_WAIT) && 2697 (recovering == adapter->outstanding_cmds)) { 2698 break; 2699 } 2700 2701 msleep(1000); 2702 } 2703 2704 spin_lock(&adapter->lock); 2705 2706 // If still outstanding commands, bail out 2707 if (adapter->outstanding_cmds) { 2708 con_log(CL_ANN, (KERN_WARNING 2709 "megaraid mbox: critical hardware error!\n")); 2710 2711 raid_dev->hw_error = 1; 2712 2713 rval = FAILED; 2714 goto out; 2715 } 2716 else { 2717 con_log(CL_ANN, (KERN_NOTICE 2718 "megaraid mbox: reset sequence completed sucessfully\n")); 2719 } 2720 2721 2722 // If the controller supports clustering, reset reservations 2723 if (!adapter->ha) { 2724 rval = SUCCESS; 2725 goto out; 2726 } 2727 2728 // clear reservations if any 2729 raw_mbox[0] = CLUSTER_CMD; 2730 raw_mbox[2] = RESET_RESERVATIONS; 2731 2732 rval = SUCCESS; 2733 if (mbox_post_sync_cmd_fast(adapter, raw_mbox) == 0) { 2734 con_log(CL_ANN, 2735 (KERN_INFO "megaraid: reservation reset\n")); 2736 } 2737 else { 2738 rval = FAILED; 2739 con_log(CL_ANN, (KERN_WARNING 2740 "megaraid: reservation reset failed\n")); 2741 } 2742 2743 out: 2744 spin_unlock_irq(&adapter->lock); 2745 return rval; 2746 } 2747 2748 /* 2749 * START: internal commands library 2750 * 2751 * This section of the driver has the common routine used by the driver and 2752 * also has all the FW routines 2753 */ 2754 2755 /** 2756 * mbox_post_sync_cmd() - blocking command to the mailbox based controllers 2757 * @adapter - controller's soft state 2758 * @raw_mbox - the mailbox 2759 * 2760 * Issue a scb in synchronous and non-interrupt mode for mailbox based 2761 * controllers 2762 */ 2763 static int 2764 mbox_post_sync_cmd(adapter_t *adapter, uint8_t raw_mbox[]) 2765 { 2766 mraid_device_t *raid_dev = ADAP2RAIDDEV(adapter); 2767 mbox64_t *mbox64; 2768 mbox_t *mbox; 2769 uint8_t status; 2770 int i; 2771 2772 2773 mbox64 = raid_dev->mbox64; 2774 mbox = raid_dev->mbox; 2775 2776 /* 2777 * Wait until mailbox is free 2778 */ 2779 if (megaraid_busywait_mbox(raid_dev) != 0) 2780 goto blocked_mailbox; 2781 2782 /* 2783 * Copy mailbox data into host structure 2784 */ 2785 memcpy((caddr_t)mbox, (caddr_t)raw_mbox, 16); 2786 mbox->cmdid = 0xFE; 2787 mbox->busy = 1; 2788 mbox->poll = 0; 2789 mbox->ack = 0; 2790 mbox->numstatus = 0xFF; 2791 mbox->status = 0xFF; 2792 2793 wmb(); 2794 WRINDOOR(raid_dev, raid_dev->mbox_dma | 0x1); 2795 2796 // wait for maximum 1 second for status to post. If the status is not 2797 // available within 1 second, assume FW is initializing and wait 2798 // for an extended amount of time 2799 if (mbox->numstatus == 0xFF) { // status not yet available 2800 udelay(25);; 2801 2802 for (i = 0; mbox->numstatus == 0xFF && i < 1000; i++) { 2803 rmb(); 2804 msleep(1); 2805 } 2806 2807 2808 if (i == 1000) { 2809 con_log(CL_ANN, (KERN_NOTICE 2810 "megaraid mailbox: wait for FW to boot ")); 2811 2812 for (i = 0; (mbox->numstatus == 0xFF) && 2813 (i < MBOX_RESET_WAIT); i++) { 2814 rmb(); 2815 con_log(CL_ANN, ("\b\b\b\b\b[%03d]", 2816 MBOX_RESET_WAIT - i)); 2817 msleep(1000); 2818 } 2819 2820 if (i == MBOX_RESET_WAIT) { 2821 2822 con_log(CL_ANN, ( 2823 "\nmegaraid mailbox: status not available\n")); 2824 2825 return -1; 2826 } 2827 con_log(CL_ANN, ("\b\b\b\b\b[ok] \n")); 2828 } 2829 } 2830 2831 // wait for maximum 1 second for poll semaphore 2832 if (mbox->poll != 0x77) { 2833 udelay(25); 2834 2835 for (i = 0; (mbox->poll != 0x77) && (i < 1000); i++) { 2836 rmb(); 2837 msleep(1); 2838 } 2839 2840 if (i == 1000) { 2841 con_log(CL_ANN, (KERN_WARNING 2842 "megaraid mailbox: could not get poll semaphore\n")); 2843 return -1; 2844 } 2845 } 2846 2847 WRINDOOR(raid_dev, raid_dev->mbox_dma | 0x2); 2848 wmb(); 2849 2850 // wait for maximum 1 second for acknowledgement 2851 if (RDINDOOR(raid_dev) & 0x2) { 2852 udelay(25); 2853 2854 for (i = 0; (RDINDOOR(raid_dev) & 0x2) && (i < 1000); i++) { 2855 rmb(); 2856 msleep(1); 2857 } 2858 2859 if (i == 1000) { 2860 con_log(CL_ANN, (KERN_WARNING 2861 "megaraid mailbox: could not acknowledge\n")); 2862 return -1; 2863 } 2864 } 2865 mbox->poll = 0; 2866 mbox->ack = 0x77; 2867 2868 status = mbox->status; 2869 2870 // invalidate the completed command id array. After command 2871 // completion, firmware would write the valid id. 2872 mbox->numstatus = 0xFF; 2873 mbox->status = 0xFF; 2874 for (i = 0; i < MBOX_MAX_FIRMWARE_STATUS; i++) { 2875 mbox->completed[i] = 0xFF; 2876 } 2877 2878 return status; 2879 2880 blocked_mailbox: 2881 2882 con_log(CL_ANN, (KERN_WARNING "megaraid: blocked mailbox\n") ); 2883 return -1; 2884 } 2885 2886 2887 /** 2888 * mbox_post_sync_cmd_fast - blocking command to the mailbox based controllers 2889 * @adapter - controller's soft state 2890 * @raw_mbox - the mailbox 2891 * 2892 * Issue a scb in synchronous and non-interrupt mode for mailbox based 2893 * controllers. This is a faster version of the synchronous command and 2894 * therefore can be called in interrupt-context as well 2895 */ 2896 static int 2897 mbox_post_sync_cmd_fast(adapter_t *adapter, uint8_t raw_mbox[]) 2898 { 2899 mraid_device_t *raid_dev = ADAP2RAIDDEV(adapter); 2900 mbox_t *mbox; 2901 long i; 2902 2903 2904 mbox = raid_dev->mbox; 2905 2906 // return immediately if the mailbox is busy 2907 if (mbox->busy) return -1; 2908 2909 // Copy mailbox data into host structure 2910 memcpy((caddr_t)mbox, (caddr_t)raw_mbox, 14); 2911 mbox->cmdid = 0xFE; 2912 mbox->busy = 1; 2913 mbox->poll = 0; 2914 mbox->ack = 0; 2915 mbox->numstatus = 0xFF; 2916 mbox->status = 0xFF; 2917 2918 wmb(); 2919 WRINDOOR(raid_dev, raid_dev->mbox_dma | 0x1); 2920 2921 for (i = 0; i < 0xFFFFF; i++) { 2922 if (mbox->numstatus != 0xFF) break; 2923 rmb(); 2924 } 2925 2926 if (i == 0xFFFFF) { 2927 // We may need to re-calibrate the counter 2928 con_log(CL_ANN, (KERN_CRIT 2929 "megaraid: fast sync command timed out\n")); 2930 } 2931 2932 WRINDOOR(raid_dev, raid_dev->mbox_dma | 0x2); 2933 wmb(); 2934 2935 return mbox->status; 2936 } 2937 2938 2939 /** 2940 * megaraid_busywait_mbox() - Wait until the controller's mailbox is available 2941 * @raid_dev - RAID device (HBA) soft state 2942 * 2943 * wait until the controller's mailbox is available to accept more commands. 2944 * wait for at most 1 second 2945 */ 2946 static int 2947 megaraid_busywait_mbox(mraid_device_t *raid_dev) 2948 { 2949 mbox_t *mbox = raid_dev->mbox; 2950 int i = 0; 2951 2952 if (mbox->busy) { 2953 udelay(25); 2954 for (i = 0; mbox->busy && i < 1000; i++) 2955 msleep(1); 2956 } 2957 2958 if (i < 1000) return 0; 2959 else return -1; 2960 } 2961 2962 2963 /** 2964 * megaraid_mbox_product_info - some static information about the controller 2965 * @adapter - our soft state 2966 * 2967 * issue commands to the controller to grab some parameters required by our 2968 * caller. 2969 */ 2970 static int 2971 megaraid_mbox_product_info(adapter_t *adapter) 2972 { 2973 mraid_device_t *raid_dev = ADAP2RAIDDEV(adapter); 2974 mbox_t *mbox; 2975 uint8_t raw_mbox[sizeof(mbox_t)]; 2976 mraid_pinfo_t *pinfo; 2977 dma_addr_t pinfo_dma_h; 2978 mraid_inquiry3_t *mraid_inq3; 2979 int i; 2980 2981 2982 memset((caddr_t)raw_mbox, 0, sizeof(raw_mbox)); 2983 mbox = (mbox_t *)raw_mbox; 2984 2985 /* 2986 * Issue an ENQUIRY3 command to find out certain adapter parameters, 2987 * e.g., max channels, max commands etc. 2988 */ 2989 pinfo = pci_alloc_consistent(adapter->pdev, sizeof(mraid_pinfo_t), 2990 &pinfo_dma_h); 2991 2992 if (pinfo == NULL) { 2993 con_log(CL_ANN, (KERN_WARNING 2994 "megaraid: out of memory, %s %d\n", __FUNCTION__, 2995 __LINE__)); 2996 2997 return -1; 2998 } 2999 memset(pinfo, 0, sizeof(mraid_pinfo_t)); 3000 3001 mbox->xferaddr = (uint32_t)adapter->ibuf_dma_h; 3002 memset((void *)adapter->ibuf, 0, MBOX_IBUF_SIZE); 3003 3004 raw_mbox[0] = FC_NEW_CONFIG; 3005 raw_mbox[2] = NC_SUBOP_ENQUIRY3; 3006 raw_mbox[3] = ENQ3_GET_SOLICITED_FULL; 3007 3008 // Issue the command 3009 if (mbox_post_sync_cmd(adapter, raw_mbox) != 0) { 3010 3011 con_log(CL_ANN, (KERN_WARNING "megaraid: Inquiry3 failed\n")); 3012 3013 pci_free_consistent(adapter->pdev, sizeof(mraid_pinfo_t), 3014 pinfo, pinfo_dma_h); 3015 3016 return -1; 3017 } 3018 3019 /* 3020 * Collect information about state of each physical drive 3021 * attached to the controller. We will expose all the disks 3022 * which are not part of RAID 3023 */ 3024 mraid_inq3 = (mraid_inquiry3_t *)adapter->ibuf; 3025 for (i = 0; i < MBOX_MAX_PHYSICAL_DRIVES; i++) { 3026 raid_dev->pdrv_state[i] = mraid_inq3->pdrv_state[i]; 3027 } 3028 3029 /* 3030 * Get product info for information like number of channels, 3031 * maximum commands supported. 3032 */ 3033 memset((caddr_t)raw_mbox, 0, sizeof(raw_mbox)); 3034 mbox->xferaddr = (uint32_t)pinfo_dma_h; 3035 3036 raw_mbox[0] = FC_NEW_CONFIG; 3037 raw_mbox[2] = NC_SUBOP_PRODUCT_INFO; 3038 3039 if (mbox_post_sync_cmd(adapter, raw_mbox) != 0) { 3040 3041 con_log(CL_ANN, (KERN_WARNING 3042 "megaraid: product info failed\n")); 3043 3044 pci_free_consistent(adapter->pdev, sizeof(mraid_pinfo_t), 3045 pinfo, pinfo_dma_h); 3046 3047 return -1; 3048 } 3049 3050 /* 3051 * Setup some parameters for host, as required by our caller 3052 */ 3053 adapter->max_channel = pinfo->nchannels; 3054 3055 /* 3056 * we will export all the logical drives on a single channel. 3057 * Add 1 since inquires do not come for inititor ID 3058 */ 3059 adapter->max_target = MAX_LOGICAL_DRIVES_40LD + 1; 3060 adapter->max_lun = 8; // up to 8 LUNs for non-disk devices 3061 3062 /* 3063 * These are the maximum outstanding commands for the scsi-layer 3064 */ 3065 adapter->max_cmds = MBOX_MAX_SCSI_CMDS; 3066 3067 memset(adapter->fw_version, 0, VERSION_SIZE); 3068 memset(adapter->bios_version, 0, VERSION_SIZE); 3069 3070 memcpy(adapter->fw_version, pinfo->fw_version, 4); 3071 adapter->fw_version[4] = 0; 3072 3073 memcpy(adapter->bios_version, pinfo->bios_version, 4); 3074 adapter->bios_version[4] = 0; 3075 3076 con_log(CL_ANN, (KERN_NOTICE 3077 "megaraid: fw version:[%s] bios version:[%s]\n", 3078 adapter->fw_version, adapter->bios_version)); 3079 3080 pci_free_consistent(adapter->pdev, sizeof(mraid_pinfo_t), pinfo, 3081 pinfo_dma_h); 3082 3083 return 0; 3084 } 3085 3086 3087 3088 /** 3089 * megaraid_mbox_extended_cdb - check for support for extended CDBs 3090 * @adapter - soft state for the controller 3091 * 3092 * this routine check whether the controller in question supports extended 3093 * ( > 10 bytes ) CDBs 3094 */ 3095 static int 3096 megaraid_mbox_extended_cdb(adapter_t *adapter) 3097 { 3098 mbox_t *mbox; 3099 uint8_t raw_mbox[sizeof(mbox_t)]; 3100 int rval; 3101 3102 mbox = (mbox_t *)raw_mbox; 3103 3104 memset((caddr_t)raw_mbox, 0, sizeof(raw_mbox)); 3105 mbox->xferaddr = (uint32_t)adapter->ibuf_dma_h; 3106 3107 memset((void *)adapter->ibuf, 0, MBOX_IBUF_SIZE); 3108 3109 raw_mbox[0] = MAIN_MISC_OPCODE; 3110 raw_mbox[2] = SUPPORT_EXT_CDB; 3111 3112 /* 3113 * Issue the command 3114 */ 3115 rval = 0; 3116 if (mbox_post_sync_cmd(adapter, raw_mbox) != 0) { 3117 rval = -1; 3118 } 3119 3120 return rval; 3121 } 3122 3123 3124 /** 3125 * megaraid_mbox_support_ha - Do we support clustering 3126 * @adapter - soft state for the controller 3127 * @init_id - ID of the initiator 3128 * 3129 * Determine if the firmware supports clustering and the ID of the initiator. 3130 */ 3131 static int 3132 megaraid_mbox_support_ha(adapter_t *adapter, uint16_t *init_id) 3133 { 3134 mbox_t *mbox; 3135 uint8_t raw_mbox[sizeof(mbox_t)]; 3136 int rval; 3137 3138 3139 mbox = (mbox_t *)raw_mbox; 3140 3141 memset((caddr_t)raw_mbox, 0, sizeof(raw_mbox)); 3142 3143 mbox->xferaddr = (uint32_t)adapter->ibuf_dma_h; 3144 3145 memset((void *)adapter->ibuf, 0, MBOX_IBUF_SIZE); 3146 3147 raw_mbox[0] = GET_TARGET_ID; 3148 3149 // Issue the command 3150 *init_id = 7; 3151 rval = -1; 3152 if (mbox_post_sync_cmd(adapter, raw_mbox) == 0) { 3153 3154 *init_id = *(uint8_t *)adapter->ibuf; 3155 3156 con_log(CL_ANN, (KERN_INFO 3157 "megaraid: cluster firmware, initiator ID: %d\n", 3158 *init_id)); 3159 3160 rval = 0; 3161 } 3162 3163 return rval; 3164 } 3165 3166 3167 /** 3168 * megaraid_mbox_support_random_del - Do we support random deletion 3169 * @adapter - soft state for the controller 3170 * 3171 * Determine if the firmware supports random deletion 3172 * Return: 1 is operation supported, 0 otherwise 3173 */ 3174 static int 3175 megaraid_mbox_support_random_del(adapter_t *adapter) 3176 { 3177 mbox_t *mbox; 3178 uint8_t raw_mbox[sizeof(mbox_t)]; 3179 int rval; 3180 3181 3182 mbox = (mbox_t *)raw_mbox; 3183 3184 memset((caddr_t)raw_mbox, 0, sizeof(mbox_t)); 3185 3186 raw_mbox[0] = FC_DEL_LOGDRV; 3187 raw_mbox[2] = OP_SUP_DEL_LOGDRV; 3188 3189 // Issue the command 3190 rval = 0; 3191 if (mbox_post_sync_cmd(adapter, raw_mbox) == 0) { 3192 3193 con_log(CL_DLEVEL1, ("megaraid: supports random deletion\n")); 3194 3195 rval = 1; 3196 } 3197 3198 return rval; 3199 } 3200 3201 3202 /** 3203 * megaraid_mbox_get_max_sg - maximum sg elements supported by the firmware 3204 * @adapter - soft state for the controller 3205 * 3206 * Find out the maximum number of scatter-gather elements supported by the 3207 * firmware 3208 */ 3209 static int 3210 megaraid_mbox_get_max_sg(adapter_t *adapter) 3211 { 3212 mbox_t *mbox; 3213 uint8_t raw_mbox[sizeof(mbox_t)]; 3214 int nsg; 3215 3216 3217 mbox = (mbox_t *)raw_mbox; 3218 3219 memset((caddr_t)raw_mbox, 0, sizeof(mbox_t)); 3220 3221 mbox->xferaddr = (uint32_t)adapter->ibuf_dma_h; 3222 3223 memset((void *)adapter->ibuf, 0, MBOX_IBUF_SIZE); 3224 3225 raw_mbox[0] = MAIN_MISC_OPCODE; 3226 raw_mbox[2] = GET_MAX_SG_SUPPORT; 3227 3228 // Issue the command 3229 if (mbox_post_sync_cmd(adapter, raw_mbox) == 0) { 3230 nsg = *(uint8_t *)adapter->ibuf; 3231 } 3232 else { 3233 nsg = MBOX_DEFAULT_SG_SIZE; 3234 } 3235 3236 if (nsg > MBOX_MAX_SG_SIZE) nsg = MBOX_MAX_SG_SIZE; 3237 3238 return nsg; 3239 } 3240 3241 3242 /** 3243 * megaraid_mbox_enum_raid_scsi - enumerate the RAID and SCSI channels 3244 * @adapter - soft state for the controller 3245 * 3246 * Enumerate the RAID and SCSI channels for ROMB platoforms so that channels 3247 * can be exported as regular SCSI channels 3248 */ 3249 static void 3250 megaraid_mbox_enum_raid_scsi(adapter_t *adapter) 3251 { 3252 mraid_device_t *raid_dev = ADAP2RAIDDEV(adapter); 3253 mbox_t *mbox; 3254 uint8_t raw_mbox[sizeof(mbox_t)]; 3255 3256 3257 mbox = (mbox_t *)raw_mbox; 3258 3259 memset((caddr_t)raw_mbox, 0, sizeof(mbox_t)); 3260 3261 mbox->xferaddr = (uint32_t)adapter->ibuf_dma_h; 3262 3263 memset((void *)adapter->ibuf, 0, MBOX_IBUF_SIZE); 3264 3265 raw_mbox[0] = CHNL_CLASS; 3266 raw_mbox[2] = GET_CHNL_CLASS; 3267 3268 // Issue the command. If the command fails, all channels are RAID 3269 // channels 3270 raid_dev->channel_class = 0xFF; 3271 if (mbox_post_sync_cmd(adapter, raw_mbox) == 0) { 3272 raid_dev->channel_class = *(uint8_t *)adapter->ibuf; 3273 } 3274 3275 return; 3276 } 3277 3278 3279 /** 3280 * megaraid_mbox_flush_cache - flush adapter and disks cache 3281 * @param adapter : soft state for the controller 3282 * 3283 * Flush adapter cache followed by disks cache 3284 */ 3285 static void 3286 megaraid_mbox_flush_cache(adapter_t *adapter) 3287 { 3288 mbox_t *mbox; 3289 uint8_t raw_mbox[sizeof(mbox_t)]; 3290 3291 3292 mbox = (mbox_t *)raw_mbox; 3293 3294 memset((caddr_t)raw_mbox, 0, sizeof(mbox_t)); 3295 3296 raw_mbox[0] = FLUSH_ADAPTER; 3297 3298 if (mbox_post_sync_cmd(adapter, raw_mbox) != 0) { 3299 con_log(CL_ANN, ("megaraid: flush adapter failed\n")); 3300 } 3301 3302 raw_mbox[0] = FLUSH_SYSTEM; 3303 3304 if (mbox_post_sync_cmd(adapter, raw_mbox) != 0) { 3305 con_log(CL_ANN, ("megaraid: flush disks cache failed\n")); 3306 } 3307 3308 return; 3309 } 3310 3311 3312 /** 3313 * megaraid_mbox_display_scb - display SCB information, mostly debug purposes 3314 * @param adapter : controllers' soft state 3315 * @param scb : SCB to be displayed 3316 * @param level : debug level for console print 3317 * 3318 * Diplay information about the given SCB iff the current debug level is 3319 * verbose 3320 */ 3321 static void 3322 megaraid_mbox_display_scb(adapter_t *adapter, scb_t *scb) 3323 { 3324 mbox_ccb_t *ccb; 3325 struct scsi_cmnd *scp; 3326 mbox_t *mbox; 3327 int level; 3328 int i; 3329 3330 3331 ccb = (mbox_ccb_t *)scb->ccb; 3332 scp = scb->scp; 3333 mbox = ccb->mbox; 3334 3335 level = CL_DLEVEL3; 3336 3337 con_log(level, (KERN_NOTICE 3338 "megaraid mailbox: status:%#x cmd:%#x id:%#x ", scb->status, 3339 mbox->cmd, scb->sno)); 3340 3341 con_log(level, ("sec:%#x lba:%#x addr:%#x ld:%d sg:%d\n", 3342 mbox->numsectors, mbox->lba, mbox->xferaddr, mbox->logdrv, 3343 mbox->numsge)); 3344 3345 if (!scp) return; 3346 3347 con_log(level, (KERN_NOTICE "scsi cmnd: ")); 3348 3349 for (i = 0; i < scp->cmd_len; i++) { 3350 con_log(level, ("%#2.02x ", scp->cmnd[i])); 3351 } 3352 3353 con_log(level, ("\n")); 3354 3355 return; 3356 } 3357 3358 3359 /** 3360 * megaraid_mbox_setup_device_map - manage device ids 3361 * @adapter : Driver's soft state 3362 * 3363 * Manange the device ids to have an appropraite mapping between the kernel 3364 * scsi addresses and megaraid scsi and logical drive addresses. We export 3365 * scsi devices on their actual addresses, whereas the logical drives are 3366 * exported on a virtual scsi channel. 3367 **/ 3368 static void 3369 megaraid_mbox_setup_device_map(adapter_t *adapter) 3370 { 3371 uint8_t c; 3372 uint8_t t; 3373 3374 /* 3375 * First fill the values on the logical drive channel 3376 */ 3377 for (t = 0; t < LSI_MAX_LOGICAL_DRIVES_64LD; t++) 3378 adapter->device_ids[adapter->max_channel][t] = 3379 (t < adapter->init_id) ? t : t - 1; 3380 3381 adapter->device_ids[adapter->max_channel][adapter->init_id] = 0xFF; 3382 3383 /* 3384 * Fill the values on the physical devices channels 3385 */ 3386 for (c = 0; c < adapter->max_channel; c++) 3387 for (t = 0; t < LSI_MAX_LOGICAL_DRIVES_64LD; t++) 3388 adapter->device_ids[c][t] = (c << 8) | t; 3389 } 3390 3391 3392 /* 3393 * END: internal commands library 3394 */ 3395 3396 /* 3397 * START: Interface for the common management module 3398 * 3399 * This is the module, which interfaces with the common mangement module to 3400 * provide support for ioctl and sysfs 3401 */ 3402 3403 /** 3404 * megaraid_cmm_register - register with the mangement module 3405 * @param adapter : HBA soft state 3406 * 3407 * Register with the management module, which allows applications to issue 3408 * ioctl calls to the drivers. This interface is used by the management module 3409 * to setup sysfs support as well. 3410 */ 3411 static int 3412 megaraid_cmm_register(adapter_t *adapter) 3413 { 3414 mraid_device_t *raid_dev = ADAP2RAIDDEV(adapter); 3415 mraid_mmadp_t adp; 3416 scb_t *scb; 3417 mbox_ccb_t *ccb; 3418 int rval; 3419 int i; 3420 3421 // Allocate memory for the base list of scb for management module. 3422 adapter->uscb_list = kmalloc(sizeof(scb_t) * MBOX_MAX_USER_CMDS, 3423 GFP_KERNEL); 3424 3425 if (adapter->uscb_list == NULL) { 3426 con_log(CL_ANN, (KERN_WARNING 3427 "megaraid: out of memory, %s %d\n", __FUNCTION__, 3428 __LINE__)); 3429 return -1; 3430 } 3431 memset(adapter->uscb_list, 0, sizeof(scb_t) * MBOX_MAX_USER_CMDS); 3432 3433 3434 // Initialize the synchronization parameters for resources for 3435 // commands for management module 3436 INIT_LIST_HEAD(&adapter->uscb_pool); 3437 3438 spin_lock_init(USER_FREE_LIST_LOCK(adapter)); 3439 3440 3441 3442 // link all the packets. Note, CCB for commands, coming from the 3443 // commom management module, mailbox physical address are already 3444 // setup by it. We just need placeholder for that in our local command 3445 // control blocks 3446 for (i = 0; i < MBOX_MAX_USER_CMDS; i++) { 3447 3448 scb = adapter->uscb_list + i; 3449 ccb = raid_dev->uccb_list + i; 3450 3451 scb->ccb = (caddr_t)ccb; 3452 ccb->mbox64 = raid_dev->umbox64 + i; 3453 ccb->mbox = &ccb->mbox64->mbox32; 3454 ccb->raw_mbox = (uint8_t *)ccb->mbox; 3455 3456 scb->gp = 0; 3457 3458 // COMMAND ID 0 - (MBOX_MAX_SCSI_CMDS-1) ARE RESERVED FOR 3459 // COMMANDS COMING FROM IO SUBSYSTEM (MID-LAYER) 3460 scb->sno = i + MBOX_MAX_SCSI_CMDS; 3461 3462 scb->scp = NULL; 3463 scb->state = SCB_FREE; 3464 scb->dma_direction = PCI_DMA_NONE; 3465 scb->dma_type = MRAID_DMA_NONE; 3466 scb->dev_channel = -1; 3467 scb->dev_target = -1; 3468 3469 // put scb in the free pool 3470 list_add_tail(&scb->list, &adapter->uscb_pool); 3471 } 3472 3473 adp.unique_id = adapter->unique_id; 3474 adp.drvr_type = DRVRTYPE_MBOX; 3475 adp.drvr_data = (unsigned long)adapter; 3476 adp.pdev = adapter->pdev; 3477 adp.issue_uioc = megaraid_mbox_mm_handler; 3478 adp.timeout = 300; 3479 adp.max_kioc = MBOX_MAX_USER_CMDS; 3480 3481 if ((rval = mraid_mm_register_adp(&adp)) != 0) { 3482 3483 con_log(CL_ANN, (KERN_WARNING 3484 "megaraid mbox: did not register with CMM\n")); 3485 3486 kfree(adapter->uscb_list); 3487 } 3488 3489 return rval; 3490 } 3491 3492 3493 /** 3494 * megaraid_cmm_unregister - un-register with the mangement module 3495 * @param adapter : HBA soft state 3496 * 3497 * Un-register with the management module. 3498 * FIXME: mgmt module must return failure for unregister if it has pending 3499 * commands in LLD 3500 */ 3501 static int 3502 megaraid_cmm_unregister(adapter_t *adapter) 3503 { 3504 kfree(adapter->uscb_list); 3505 mraid_mm_unregister_adp(adapter->unique_id); 3506 return 0; 3507 } 3508 3509 3510 /** 3511 * megaraid_mbox_mm_handler - interface for CMM to issue commands to LLD 3512 * @param drvr_data : LLD specific data 3513 * @param kioc : CMM interface packet 3514 * @param action : command action 3515 * 3516 * This routine is invoked whenever the Common Mangement Module (CMM) has a 3517 * command for us. The 'action' parameter specifies if this is a new command 3518 * or otherwise. 3519 */ 3520 static int 3521 megaraid_mbox_mm_handler(unsigned long drvr_data, uioc_t *kioc, uint32_t action) 3522 { 3523 adapter_t *adapter; 3524 3525 if (action != IOCTL_ISSUE) { 3526 con_log(CL_ANN, (KERN_WARNING 3527 "megaraid: unsupported management action:%#2x\n", 3528 action)); 3529 return (-ENOTSUPP); 3530 } 3531 3532 adapter = (adapter_t *)drvr_data; 3533 3534 // make sure this adapter is not being detached right now. 3535 if (atomic_read(&adapter->being_detached)) { 3536 con_log(CL_ANN, (KERN_WARNING 3537 "megaraid: reject management request, detaching\n")); 3538 return (-ENODEV); 3539 } 3540 3541 switch (kioc->opcode) { 3542 3543 case GET_ADAP_INFO: 3544 3545 kioc->status = gather_hbainfo(adapter, (mraid_hba_info_t *) 3546 (unsigned long)kioc->buf_vaddr); 3547 3548 kioc->done(kioc); 3549 3550 return kioc->status; 3551 3552 case MBOX_CMD: 3553 3554 return megaraid_mbox_mm_command(adapter, kioc); 3555 3556 default: 3557 kioc->status = (-EINVAL); 3558 kioc->done(kioc); 3559 return (-EINVAL); 3560 } 3561 3562 return 0; // not reached 3563 } 3564 3565 /** 3566 * megaraid_mbox_mm_command - issues commands routed through CMM 3567 * @param adapter : HBA soft state 3568 * @param kioc : management command packet 3569 * 3570 * Issues commands, which are routed through the management module. 3571 */ 3572 static int 3573 megaraid_mbox_mm_command(adapter_t *adapter, uioc_t *kioc) 3574 { 3575 struct list_head *head = &adapter->uscb_pool; 3576 mbox64_t *mbox64; 3577 uint8_t *raw_mbox; 3578 scb_t *scb; 3579 mbox_ccb_t *ccb; 3580 unsigned long flags; 3581 3582 // detach one scb from free pool 3583 spin_lock_irqsave(USER_FREE_LIST_LOCK(adapter), flags); 3584 3585 if (list_empty(head)) { // should never happen because of CMM 3586 3587 con_log(CL_ANN, (KERN_WARNING 3588 "megaraid mbox: bug in cmm handler, lost resources\n")); 3589 3590 spin_unlock_irqrestore(USER_FREE_LIST_LOCK(adapter), flags); 3591 3592 return (-EINVAL); 3593 } 3594 3595 scb = list_entry(head->next, scb_t, list); 3596 list_del_init(&scb->list); 3597 3598 spin_unlock_irqrestore(USER_FREE_LIST_LOCK(adapter), flags); 3599 3600 scb->state = SCB_ACTIVE; 3601 scb->dma_type = MRAID_DMA_NONE; 3602 scb->dma_direction = PCI_DMA_NONE; 3603 3604 ccb = (mbox_ccb_t *)scb->ccb; 3605 mbox64 = (mbox64_t *)(unsigned long)kioc->cmdbuf; 3606 raw_mbox = (uint8_t *)&mbox64->mbox32; 3607 3608 memcpy(ccb->mbox64, mbox64, sizeof(mbox64_t)); 3609 3610 scb->gp = (unsigned long)kioc; 3611 3612 /* 3613 * If it is a logdrv random delete operation, we have to wait till 3614 * there are no outstanding cmds at the fw and then issue it directly 3615 */ 3616 if (raw_mbox[0] == FC_DEL_LOGDRV && raw_mbox[2] == OP_DEL_LOGDRV) { 3617 3618 if (wait_till_fw_empty(adapter)) { 3619 con_log(CL_ANN, (KERN_NOTICE 3620 "megaraid mbox: LD delete, timed out\n")); 3621 3622 kioc->status = -ETIME; 3623 3624 scb->status = -1; 3625 3626 megaraid_mbox_mm_done(adapter, scb); 3627 3628 return (-ETIME); 3629 } 3630 3631 INIT_LIST_HEAD(&scb->list); 3632 3633 scb->state = SCB_ISSUED; 3634 if (mbox_post_cmd(adapter, scb) != 0) { 3635 3636 con_log(CL_ANN, (KERN_NOTICE 3637 "megaraid mbox: LD delete, mailbox busy\n")); 3638 3639 kioc->status = -EBUSY; 3640 3641 scb->status = -1; 3642 3643 megaraid_mbox_mm_done(adapter, scb); 3644 3645 return (-EBUSY); 3646 } 3647 3648 return 0; 3649 } 3650 3651 // put the command on the pending list and execute 3652 megaraid_mbox_runpendq(adapter, scb); 3653 3654 return 0; 3655 } 3656 3657 3658 static int 3659 wait_till_fw_empty(adapter_t *adapter) 3660 { 3661 unsigned long flags = 0; 3662 int i; 3663 3664 3665 /* 3666 * Set the quiescent flag to stop issuing cmds to FW. 3667 */ 3668 spin_lock_irqsave(&adapter->lock, flags); 3669 adapter->quiescent++; 3670 spin_unlock_irqrestore(&adapter->lock, flags); 3671 3672 /* 3673 * Wait till there are no more cmds outstanding at FW. Try for at most 3674 * 60 seconds 3675 */ 3676 for (i = 0; i < 60 && adapter->outstanding_cmds; i++) { 3677 con_log(CL_DLEVEL1, (KERN_INFO 3678 "megaraid: FW has %d pending commands\n", 3679 adapter->outstanding_cmds)); 3680 3681 msleep(1000); 3682 } 3683 3684 return adapter->outstanding_cmds; 3685 } 3686 3687 3688 /** 3689 * megaraid_mbox_mm_done - callback for CMM commands 3690 * @adapter : HBA soft state 3691 * @scb : completed command 3692 * 3693 * Callback routine for internal commands originated from the management 3694 * module. 3695 */ 3696 static void 3697 megaraid_mbox_mm_done(adapter_t *adapter, scb_t *scb) 3698 { 3699 uioc_t *kioc; 3700 mbox64_t *mbox64; 3701 uint8_t *raw_mbox; 3702 unsigned long flags; 3703 3704 kioc = (uioc_t *)scb->gp; 3705 kioc->status = 0; 3706 mbox64 = (mbox64_t *)(unsigned long)kioc->cmdbuf; 3707 mbox64->mbox32.status = scb->status; 3708 raw_mbox = (uint8_t *)&mbox64->mbox32; 3709 3710 3711 // put scb in the free pool 3712 scb->state = SCB_FREE; 3713 scb->scp = NULL; 3714 3715 spin_lock_irqsave(USER_FREE_LIST_LOCK(adapter), flags); 3716 3717 list_add(&scb->list, &adapter->uscb_pool); 3718 3719 spin_unlock_irqrestore(USER_FREE_LIST_LOCK(adapter), flags); 3720 3721 // if a delete logical drive operation succeeded, restart the 3722 // controller 3723 if (raw_mbox[0] == FC_DEL_LOGDRV && raw_mbox[2] == OP_DEL_LOGDRV) { 3724 3725 adapter->quiescent--; 3726 3727 megaraid_mbox_runpendq(adapter, NULL); 3728 } 3729 3730 kioc->done(kioc); 3731 3732 return; 3733 } 3734 3735 3736 /** 3737 * gather_hbainfo - HBA characteristics for the applications 3738 * @param adapter : HBA soft state 3739 * @param hinfo : pointer to the caller's host info strucuture 3740 */ 3741 static int 3742 gather_hbainfo(adapter_t *adapter, mraid_hba_info_t *hinfo) 3743 { 3744 uint8_t dmajor; 3745 3746 dmajor = megaraid_mbox_version[0]; 3747 3748 hinfo->pci_vendor_id = adapter->pdev->vendor; 3749 hinfo->pci_device_id = adapter->pdev->device; 3750 hinfo->subsys_vendor_id = adapter->pdev->subsystem_vendor; 3751 hinfo->subsys_device_id = adapter->pdev->subsystem_device; 3752 3753 hinfo->pci_bus = adapter->pdev->bus->number; 3754 hinfo->pci_dev_fn = adapter->pdev->devfn; 3755 hinfo->pci_slot = PCI_SLOT(adapter->pdev->devfn); 3756 hinfo->irq = adapter->host->irq; 3757 hinfo->baseport = ADAP2RAIDDEV(adapter)->baseport; 3758 3759 hinfo->unique_id = (hinfo->pci_bus << 8) | adapter->pdev->devfn; 3760 hinfo->host_no = adapter->host->host_no; 3761 3762 return 0; 3763 } 3764 3765 /* 3766 * END: Interface for the common management module 3767 */ 3768 3769 3770 3771 /** 3772 * megaraid_sysfs_alloc_resources - allocate sysfs related resources 3773 * 3774 * Allocate packets required to issue FW calls whenever the sysfs attributes 3775 * are read. These attributes would require up-to-date information from the 3776 * FW. Also set up resources for mutual exclusion to share these resources and 3777 * the wait queue. 3778 * 3779 * @param adapter : controller's soft state 3780 * 3781 * @return 0 on success 3782 * @return -ERROR_CODE on failure 3783 */ 3784 static int 3785 megaraid_sysfs_alloc_resources(adapter_t *adapter) 3786 { 3787 mraid_device_t *raid_dev = ADAP2RAIDDEV(adapter); 3788 int rval = 0; 3789 3790 raid_dev->sysfs_uioc = kmalloc(sizeof(uioc_t), GFP_KERNEL); 3791 3792 raid_dev->sysfs_mbox64 = kmalloc(sizeof(mbox64_t), GFP_KERNEL); 3793 3794 raid_dev->sysfs_buffer = pci_alloc_consistent(adapter->pdev, 3795 PAGE_SIZE, &raid_dev->sysfs_buffer_dma); 3796 3797 if (!raid_dev->sysfs_uioc || !raid_dev->sysfs_mbox64 || 3798 !raid_dev->sysfs_buffer) { 3799 3800 con_log(CL_ANN, (KERN_WARNING 3801 "megaraid: out of memory, %s %d\n", __FUNCTION__, 3802 __LINE__)); 3803 3804 rval = -ENOMEM; 3805 3806 megaraid_sysfs_free_resources(adapter); 3807 } 3808 3809 sema_init(&raid_dev->sysfs_sem, 1); 3810 3811 init_waitqueue_head(&raid_dev->sysfs_wait_q); 3812 3813 return rval; 3814 } 3815 3816 3817 /** 3818 * megaraid_sysfs_free_resources - free sysfs related resources 3819 * 3820 * Free packets allocated for sysfs FW commands 3821 * 3822 * @param adapter : controller's soft state 3823 */ 3824 static void 3825 megaraid_sysfs_free_resources(adapter_t *adapter) 3826 { 3827 mraid_device_t *raid_dev = ADAP2RAIDDEV(adapter); 3828 3829 kfree(raid_dev->sysfs_uioc); 3830 kfree(raid_dev->sysfs_mbox64); 3831 3832 if (raid_dev->sysfs_buffer) { 3833 pci_free_consistent(adapter->pdev, PAGE_SIZE, 3834 raid_dev->sysfs_buffer, raid_dev->sysfs_buffer_dma); 3835 } 3836 } 3837 3838 3839 /** 3840 * megaraid_sysfs_get_ldmap_done - callback for get ldmap 3841 * 3842 * Callback routine called in the ISR/tasklet context for get ldmap call 3843 * 3844 * @param uioc : completed packet 3845 */ 3846 static void 3847 megaraid_sysfs_get_ldmap_done(uioc_t *uioc) 3848 { 3849 adapter_t *adapter = (adapter_t *)uioc->buf_vaddr; 3850 mraid_device_t *raid_dev = ADAP2RAIDDEV(adapter); 3851 3852 uioc->status = 0; 3853 3854 wake_up(&raid_dev->sysfs_wait_q); 3855 } 3856 3857 3858 /** 3859 * megaraid_sysfs_get_ldmap_timeout - timeout handling for get ldmap 3860 * 3861 * Timeout routine to recover and return to application, in case the adapter 3862 * has stopped responding. A timeout of 60 seconds for this command seem like 3863 * a good value 3864 * 3865 * @param uioc : timed out packet 3866 */ 3867 static void 3868 megaraid_sysfs_get_ldmap_timeout(unsigned long data) 3869 { 3870 uioc_t *uioc = (uioc_t *)data; 3871 adapter_t *adapter = (adapter_t *)uioc->buf_vaddr; 3872 mraid_device_t *raid_dev = ADAP2RAIDDEV(adapter); 3873 3874 uioc->status = -ETIME; 3875 3876 wake_up(&raid_dev->sysfs_wait_q); 3877 } 3878 3879 3880 /** 3881 * megaraid_sysfs_get_ldmap - get update logical drive map 3882 * 3883 * This routine will be called whenever user reads the logical drive 3884 * attributes, go get the current logical drive mapping table from the 3885 * firmware. We use the managment API's to issue commands to the controller. 3886 * 3887 * NOTE: The commands issuance functionality is not generalized and 3888 * implemented in context of "get ld map" command only. If required, the 3889 * command issuance logical can be trivially pulled out and implemented as a 3890 * standalone libary. For now, this should suffice since there is no other 3891 * user of this interface. 3892 * 3893 * @param adapter : controller's soft state 3894 * 3895 * @return 0 on success 3896 * @return -1 on failure 3897 */ 3898 static int 3899 megaraid_sysfs_get_ldmap(adapter_t *adapter) 3900 { 3901 mraid_device_t *raid_dev = ADAP2RAIDDEV(adapter); 3902 uioc_t *uioc; 3903 mbox64_t *mbox64; 3904 mbox_t *mbox; 3905 char *raw_mbox; 3906 struct timer_list sysfs_timer; 3907 struct timer_list *timerp; 3908 caddr_t ldmap; 3909 int rval = 0; 3910 3911 /* 3912 * Allow only one read at a time to go through the sysfs attributes 3913 */ 3914 down(&raid_dev->sysfs_sem); 3915 3916 uioc = raid_dev->sysfs_uioc; 3917 mbox64 = raid_dev->sysfs_mbox64; 3918 ldmap = raid_dev->sysfs_buffer; 3919 3920 memset(uioc, 0, sizeof(uioc_t)); 3921 memset(mbox64, 0, sizeof(mbox64_t)); 3922 memset(ldmap, 0, sizeof(raid_dev->curr_ldmap)); 3923 3924 mbox = &mbox64->mbox32; 3925 raw_mbox = (char *)mbox; 3926 uioc->cmdbuf = (uint64_t)(unsigned long)mbox64; 3927 uioc->buf_vaddr = (caddr_t)adapter; 3928 uioc->status = -ENODATA; 3929 uioc->done = megaraid_sysfs_get_ldmap_done; 3930 3931 /* 3932 * Prepare the mailbox packet to get the current logical drive mapping 3933 * table 3934 */ 3935 mbox->xferaddr = (uint32_t)raid_dev->sysfs_buffer_dma; 3936 3937 raw_mbox[0] = FC_DEL_LOGDRV; 3938 raw_mbox[2] = OP_GET_LDID_MAP; 3939 3940 /* 3941 * Setup a timer to recover from a non-responding controller 3942 */ 3943 timerp = &sysfs_timer; 3944 init_timer(timerp); 3945 3946 timerp->function = megaraid_sysfs_get_ldmap_timeout; 3947 timerp->data = (unsigned long)uioc; 3948 timerp->expires = jiffies + 60 * HZ; 3949 3950 add_timer(timerp); 3951 3952 /* 3953 * Send the command to the firmware 3954 */ 3955 rval = megaraid_mbox_mm_command(adapter, uioc); 3956 3957 if (rval == 0) { // command successfully issued 3958 wait_event(raid_dev->sysfs_wait_q, (uioc->status != -ENODATA)); 3959 3960 /* 3961 * Check if the command timed out 3962 */ 3963 if (uioc->status == -ETIME) { 3964 con_log(CL_ANN, (KERN_NOTICE 3965 "megaraid: sysfs get ld map timed out\n")); 3966 3967 rval = -ETIME; 3968 } 3969 else { 3970 rval = mbox->status; 3971 } 3972 3973 if (rval == 0) { 3974 memcpy(raid_dev->curr_ldmap, ldmap, 3975 sizeof(raid_dev->curr_ldmap)); 3976 } 3977 else { 3978 con_log(CL_ANN, (KERN_NOTICE 3979 "megaraid: get ld map failed with %x\n", rval)); 3980 } 3981 } 3982 else { 3983 con_log(CL_ANN, (KERN_NOTICE 3984 "megaraid: could not issue ldmap command:%x\n", rval)); 3985 } 3986 3987 3988 del_timer_sync(timerp); 3989 3990 up(&raid_dev->sysfs_sem); 3991 3992 return rval; 3993 } 3994 3995 3996 /** 3997 * megaraid_sysfs_show_app_hndl - display application handle for this adapter 3998 * 3999 * Display the handle used by the applications while executing management 4000 * tasks on the adapter. We invoke a management module API to get the adapter 4001 * handle, since we do not interface with applications directly. 4002 * 4003 * @param cdev : class device object representation for the host 4004 * @param buf : buffer to send data to 4005 */ 4006 static ssize_t 4007 megaraid_sysfs_show_app_hndl(struct class_device *cdev, char *buf) 4008 { 4009 struct Scsi_Host *shost = class_to_shost(cdev); 4010 adapter_t *adapter = (adapter_t *)SCSIHOST2ADAP(shost); 4011 uint32_t app_hndl; 4012 4013 app_hndl = mraid_mm_adapter_app_handle(adapter->unique_id); 4014 4015 return snprintf(buf, 8, "%u\n", app_hndl); 4016 } 4017 4018 4019 /** 4020 * megaraid_sysfs_show_ldnum - display the logical drive number for this device 4021 * 4022 * Display the logical drive number for the device in question, if it a valid 4023 * logical drive. For physical devices, "-1" is returned 4024 * The logical drive number is displayed in following format 4025 * 4026 * <SCSI ID> <LD NUM> <LD STICKY ID> <APP ADAPTER HANDLE> 4027 * <int> <int> <int> <int> 4028 * 4029 * @param dev : device object representation for the scsi device 4030 * @param buf : buffer to send data to 4031 */ 4032 static ssize_t 4033 megaraid_sysfs_show_ldnum(struct device *dev, struct device_attribute *attr, char *buf) 4034 { 4035 struct scsi_device *sdev = to_scsi_device(dev); 4036 adapter_t *adapter = (adapter_t *)SCSIHOST2ADAP(sdev->host); 4037 mraid_device_t *raid_dev = ADAP2RAIDDEV(adapter); 4038 int scsi_id = -1; 4039 int logical_drv = -1; 4040 int ldid_map = -1; 4041 uint32_t app_hndl = 0; 4042 int mapped_sdev_id; 4043 int rval; 4044 int i; 4045 4046 if (raid_dev->random_del_supported && 4047 MRAID_IS_LOGICAL_SDEV(adapter, sdev)) { 4048 4049 rval = megaraid_sysfs_get_ldmap(adapter); 4050 if (rval == 0) { 4051 4052 for (i = 0; i < MAX_LOGICAL_DRIVES_40LD; i++) { 4053 4054 mapped_sdev_id = sdev->id; 4055 4056 if (sdev->id > adapter->init_id) { 4057 mapped_sdev_id -= 1; 4058 } 4059 4060 if (raid_dev->curr_ldmap[i] == mapped_sdev_id) { 4061 4062 scsi_id = sdev->id; 4063 4064 logical_drv = i; 4065 4066 ldid_map = raid_dev->curr_ldmap[i]; 4067 4068 app_hndl = mraid_mm_adapter_app_handle( 4069 adapter->unique_id); 4070 4071 break; 4072 } 4073 } 4074 } 4075 else { 4076 con_log(CL_ANN, (KERN_NOTICE 4077 "megaraid: sysfs get ld map failed: %x\n", 4078 rval)); 4079 } 4080 } 4081 4082 return snprintf(buf, 36, "%d %d %d %d\n", scsi_id, logical_drv, 4083 ldid_map, app_hndl); 4084 } 4085 4086 4087 /* 4088 * END: Mailbox Low Level Driver 4089 */ 4090 module_init(megaraid_init); 4091 module_exit(megaraid_exit); 4092 4093 /* vim: set ts=8 sw=8 tw=78 ai si: */ 4094