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