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