1 /* 2 * 3 * Linux MegaRAID device driver 4 * 5 * Copyright (c) 2003-2004 LSI Logic Corporation. 6 * 7 * This program is free software; you can redistribute it and/or 8 * modify it under the terms of the GNU General Public License 9 * as published by the Free Software Foundation; either version 10 * 2 of the License, or (at your option) any later version. 11 * 12 * FILE : megaraid_mbox.c 13 * Version : v2.20.4.6 (Mar 07 2005) 14 * 15 * Authors: 16 * Atul Mukker <Atul.Mukker@lsil.com> 17 * Sreenivas Bagalkote <Sreenivas.Bagalkote@lsil.com> 18 * Manoj Jose <Manoj.Jose@lsil.com> 19 * 20 * List of supported controllers 21 * 22 * OEM Product Name VID DID SSVID SSID 23 * --- ------------ --- --- ---- ---- 24 * Dell PERC3/QC 101E 1960 1028 0471 25 * Dell PERC3/DC 101E 1960 1028 0493 26 * Dell PERC3/SC 101E 1960 1028 0475 27 * Dell PERC3/Di 1028 1960 1028 0123 28 * Dell PERC4/SC 1000 1960 1028 0520 29 * Dell PERC4/DC 1000 1960 1028 0518 30 * Dell PERC4/QC 1000 0407 1028 0531 31 * Dell PERC4/Di 1028 000F 1028 014A 32 * Dell PERC 4e/Si 1028 0013 1028 016c 33 * Dell PERC 4e/Di 1028 0013 1028 016d 34 * Dell PERC 4e/Di 1028 0013 1028 016e 35 * Dell PERC 4e/Di 1028 0013 1028 016f 36 * Dell PERC 4e/Di 1028 0013 1028 0170 37 * Dell PERC 4e/DC 1000 0408 1028 0002 38 * Dell PERC 4e/SC 1000 0408 1028 0001 39 * 40 * 41 * LSI MegaRAID SCSI 320-0 1000 1960 1000 A520 42 * LSI MegaRAID SCSI 320-1 1000 1960 1000 0520 43 * LSI MegaRAID SCSI 320-2 1000 1960 1000 0518 44 * LSI MegaRAID SCSI 320-0X 1000 0407 1000 0530 45 * LSI MegaRAID SCSI 320-2X 1000 0407 1000 0532 46 * LSI MegaRAID SCSI 320-4X 1000 0407 1000 0531 47 * LSI MegaRAID SCSI 320-1E 1000 0408 1000 0001 48 * LSI MegaRAID SCSI 320-2E 1000 0408 1000 0002 49 * LSI MegaRAID SATA 150-4 1000 1960 1000 4523 50 * LSI MegaRAID SATA 150-6 1000 1960 1000 0523 51 * LSI MegaRAID SATA 300-4X 1000 0409 1000 3004 52 * LSI MegaRAID SATA 300-8X 1000 0409 1000 3008 53 * 54 * INTEL RAID Controller SRCU42X 1000 0407 8086 0532 55 * INTEL RAID Controller SRCS16 1000 1960 8086 0523 56 * INTEL RAID Controller SRCU42E 1000 0408 8086 0002 57 * INTEL RAID Controller SRCZCRX 1000 0407 8086 0530 58 * INTEL RAID Controller SRCS28X 1000 0409 8086 3008 59 * INTEL RAID Controller SROMBU42E 1000 0408 8086 3431 60 * INTEL RAID Controller SROMBU42E 1000 0408 8086 3499 61 * INTEL RAID Controller SRCU51L 1000 1960 8086 0520 62 * 63 * FSC MegaRAID PCI Express ROMB 1000 0408 1734 1065 64 * 65 * ACER MegaRAID ROMB-2E 1000 0408 1025 004D 66 * 67 * NEC MegaRAID PCI Express ROMB 1000 0408 1033 8287 68 * 69 * For history of changes, see Documentation/ChangeLog.megaraid 70 */ 71 72 #include "megaraid_mbox.h" 73 74 static int megaraid_init(void); 75 static void megaraid_exit(void); 76 77 static int megaraid_probe_one(struct pci_dev*, const struct pci_device_id *); 78 static void megaraid_detach_one(struct pci_dev *); 79 static void megaraid_mbox_shutdown(struct device *); 80 81 static int megaraid_io_attach(adapter_t *); 82 static void megaraid_io_detach(adapter_t *); 83 84 static int megaraid_init_mbox(adapter_t *); 85 static void megaraid_fini_mbox(adapter_t *); 86 87 static int megaraid_alloc_cmd_packets(adapter_t *); 88 static void megaraid_free_cmd_packets(adapter_t *); 89 90 static int megaraid_mbox_setup_dma_pools(adapter_t *); 91 static void megaraid_mbox_teardown_dma_pools(adapter_t *); 92 93 static int megaraid_sysfs_alloc_resources(adapter_t *); 94 static void megaraid_sysfs_free_resources(adapter_t *); 95 96 static int megaraid_abort_handler(struct scsi_cmnd *); 97 static int megaraid_reset_handler(struct scsi_cmnd *); 98 99 static int mbox_post_sync_cmd(adapter_t *, uint8_t []); 100 static int mbox_post_sync_cmd_fast(adapter_t *, uint8_t []); 101 static int megaraid_busywait_mbox(mraid_device_t *); 102 static int megaraid_mbox_product_info(adapter_t *); 103 static int megaraid_mbox_extended_cdb(adapter_t *); 104 static int megaraid_mbox_support_ha(adapter_t *, uint16_t *); 105 static int megaraid_mbox_support_random_del(adapter_t *); 106 static int megaraid_mbox_get_max_sg(adapter_t *); 107 static void megaraid_mbox_enum_raid_scsi(adapter_t *); 108 static void megaraid_mbox_flush_cache(adapter_t *); 109 110 static void megaraid_mbox_display_scb(adapter_t *, scb_t *); 111 static void megaraid_mbox_setup_device_map(adapter_t *); 112 113 static int megaraid_queue_command(struct scsi_cmnd *, 114 void (*)(struct scsi_cmnd *)); 115 static scb_t *megaraid_mbox_build_cmd(adapter_t *, struct scsi_cmnd *, int *); 116 static void megaraid_mbox_runpendq(adapter_t *, scb_t *); 117 static void megaraid_mbox_prepare_pthru(adapter_t *, scb_t *, 118 struct scsi_cmnd *); 119 static void megaraid_mbox_prepare_epthru(adapter_t *, scb_t *, 120 struct scsi_cmnd *); 121 122 static irqreturn_t megaraid_isr(int, void *, struct pt_regs *); 123 124 static void megaraid_mbox_dpc(unsigned long); 125 126 static ssize_t megaraid_sysfs_show_app_hndl(struct class_device *, char *); 127 static ssize_t megaraid_sysfs_show_ldnum(struct device *, struct device_attribute *attr, char *); 128 129 static int megaraid_cmm_register(adapter_t *); 130 static int megaraid_cmm_unregister(adapter_t *); 131 static int megaraid_mbox_mm_handler(unsigned long, uioc_t *, uint32_t); 132 static int megaraid_mbox_mm_command(adapter_t *, uioc_t *); 133 static void megaraid_mbox_mm_done(adapter_t *, scb_t *); 134 static int gather_hbainfo(adapter_t *, mraid_hba_info_t *); 135 static int wait_till_fw_empty(adapter_t *); 136 137 138 139 MODULE_AUTHOR("LSI Logic Corporation"); 140 MODULE_DESCRIPTION("LSI Logic MegaRAID Mailbox Driver"); 141 MODULE_LICENSE("GPL"); 142 MODULE_VERSION(MEGARAID_VERSION); 143 144 /* 145 * ### modules parameters for driver ### 146 */ 147 148 /** 149 * Set to enable driver to expose unconfigured disk to kernel 150 */ 151 static int megaraid_expose_unconf_disks = 0; 152 module_param_named(unconf_disks, megaraid_expose_unconf_disks, int, 0); 153 MODULE_PARM_DESC(unconf_disks, 154 "Set to expose unconfigured disks to kernel (default=0)"); 155 156 /** 157 * driver wait time if the adapter's mailbox is busy 158 */ 159 static unsigned int max_mbox_busy_wait = MBOX_BUSY_WAIT; 160 module_param_named(busy_wait, max_mbox_busy_wait, int, 0); 161 MODULE_PARM_DESC(busy_wait, 162 "Max wait for mailbox in microseconds if busy (default=10)"); 163 164 /** 165 * number of sectors per IO command 166 */ 167 static unsigned int megaraid_max_sectors = MBOX_MAX_SECTORS; 168 module_param_named(max_sectors, megaraid_max_sectors, int, 0); 169 MODULE_PARM_DESC(max_sectors, 170 "Maximum number of sectors per IO command (default=128)"); 171 172 /** 173 * number of commands per logical unit 174 */ 175 static unsigned int megaraid_cmd_per_lun = MBOX_DEF_CMD_PER_LUN; 176 module_param_named(cmd_per_lun, megaraid_cmd_per_lun, int, 0); 177 MODULE_PARM_DESC(cmd_per_lun, 178 "Maximum number of commands per logical unit (default=64)"); 179 180 181 /** 182 * Fast driver load option, skip scanning for physical devices during load. 183 * This would result in non-disk devices being skipped during driver load 184 * time. These can be later added though, using /proc/scsi/scsi 185 */ 186 static unsigned int megaraid_fast_load = 0; 187 module_param_named(fast_load, megaraid_fast_load, int, 0); 188 MODULE_PARM_DESC(fast_load, 189 "Faster loading of the driver, skips physical devices! (default=0)"); 190 191 192 /** 193 * mraid_debug level - threshold for amount of information to be displayed by 194 * the driver. This level can be changed through modules parameters, ioctl or 195 * sysfs/proc interface. By default, print the announcement messages only. 196 */ 197 int mraid_debug_level = CL_ANN; 198 module_param_named(debug_level, mraid_debug_level, int, 0); 199 MODULE_PARM_DESC(debug_level, "Debug level for driver (default=0)"); 200 201 /* 202 * ### global data ### 203 */ 204 static uint8_t megaraid_mbox_version[8] = 205 { 0x02, 0x20, 0x04, 0x06, 3, 7, 20, 5 }; 206 207 208 /* 209 * PCI table for all supported controllers. 210 */ 211 static struct pci_device_id pci_id_table_g[] = { 212 { 213 PCI_VENDOR_ID_DELL, 214 PCI_DEVICE_ID_PERC4_DI_DISCOVERY, 215 PCI_VENDOR_ID_DELL, 216 PCI_SUBSYS_ID_PERC4_DI_DISCOVERY, 217 }, 218 { 219 PCI_VENDOR_ID_LSI_LOGIC, 220 PCI_DEVICE_ID_PERC4_SC, 221 PCI_VENDOR_ID_DELL, 222 PCI_SUBSYS_ID_PERC4_SC, 223 }, 224 { 225 PCI_VENDOR_ID_LSI_LOGIC, 226 PCI_DEVICE_ID_PERC4_DC, 227 PCI_VENDOR_ID_DELL, 228 PCI_SUBSYS_ID_PERC4_DC, 229 }, 230 { 231 PCI_VENDOR_ID_LSI_LOGIC, 232 PCI_DEVICE_ID_VERDE, 233 PCI_ANY_ID, 234 PCI_ANY_ID, 235 }, 236 { 237 PCI_VENDOR_ID_DELL, 238 PCI_DEVICE_ID_PERC4_DI_EVERGLADES, 239 PCI_VENDOR_ID_DELL, 240 PCI_SUBSYS_ID_PERC4_DI_EVERGLADES, 241 }, 242 { 243 PCI_VENDOR_ID_DELL, 244 PCI_DEVICE_ID_PERC4E_SI_BIGBEND, 245 PCI_VENDOR_ID_DELL, 246 PCI_SUBSYS_ID_PERC4E_SI_BIGBEND, 247 }, 248 { 249 PCI_VENDOR_ID_DELL, 250 PCI_DEVICE_ID_PERC4E_DI_KOBUK, 251 PCI_VENDOR_ID_DELL, 252 PCI_SUBSYS_ID_PERC4E_DI_KOBUK, 253 }, 254 { 255 PCI_VENDOR_ID_DELL, 256 PCI_DEVICE_ID_PERC4E_DI_CORVETTE, 257 PCI_VENDOR_ID_DELL, 258 PCI_SUBSYS_ID_PERC4E_DI_CORVETTE, 259 }, 260 { 261 PCI_VENDOR_ID_DELL, 262 PCI_DEVICE_ID_PERC4E_DI_EXPEDITION, 263 PCI_VENDOR_ID_DELL, 264 PCI_SUBSYS_ID_PERC4E_DI_EXPEDITION, 265 }, 266 { 267 PCI_VENDOR_ID_DELL, 268 PCI_DEVICE_ID_PERC4E_DI_GUADALUPE, 269 PCI_VENDOR_ID_DELL, 270 PCI_SUBSYS_ID_PERC4E_DI_GUADALUPE, 271 }, 272 { 273 PCI_VENDOR_ID_LSI_LOGIC, 274 PCI_DEVICE_ID_DOBSON, 275 PCI_ANY_ID, 276 PCI_ANY_ID, 277 }, 278 { 279 PCI_VENDOR_ID_AMI, 280 PCI_DEVICE_ID_AMI_MEGARAID3, 281 PCI_VENDOR_ID_DELL, 282 PCI_SUBSYS_ID_PERC3_QC, 283 }, 284 { 285 PCI_VENDOR_ID_AMI, 286 PCI_DEVICE_ID_AMI_MEGARAID3, 287 PCI_VENDOR_ID_DELL, 288 PCI_SUBSYS_ID_PERC3_DC, 289 }, 290 { 291 PCI_VENDOR_ID_AMI, 292 PCI_DEVICE_ID_AMI_MEGARAID3, 293 PCI_VENDOR_ID_DELL, 294 PCI_SUBSYS_ID_PERC3_SC, 295 }, 296 { 297 PCI_VENDOR_ID_AMI, 298 PCI_DEVICE_ID_AMI_MEGARAID3, 299 PCI_VENDOR_ID_AMI, 300 PCI_SUBSYS_ID_PERC3_SC, 301 }, 302 { 303 PCI_VENDOR_ID_AMI, 304 PCI_DEVICE_ID_AMI_MEGARAID3, 305 PCI_VENDOR_ID_AMI, 306 PCI_SUBSYS_ID_PERC3_DC, 307 }, 308 { 309 PCI_VENDOR_ID_LSI_LOGIC, 310 PCI_DEVICE_ID_MEGARAID_SCSI_320_0, 311 PCI_VENDOR_ID_LSI_LOGIC, 312 PCI_SUBSYS_ID_MEGARAID_SCSI_320_0, 313 }, 314 { 315 PCI_VENDOR_ID_LSI_LOGIC, 316 PCI_DEVICE_ID_MEGARAID_SCSI_320_1, 317 PCI_VENDOR_ID_LSI_LOGIC, 318 PCI_SUBSYS_ID_MEGARAID_SCSI_320_1, 319 }, 320 { 321 PCI_VENDOR_ID_LSI_LOGIC, 322 PCI_DEVICE_ID_MEGARAID_SCSI_320_2, 323 PCI_VENDOR_ID_LSI_LOGIC, 324 PCI_SUBSYS_ID_MEGARAID_SCSI_320_2, 325 }, 326 { 327 PCI_VENDOR_ID_LSI_LOGIC, 328 PCI_DEVICE_ID_MEGARAID_I4_133_RAID, 329 PCI_VENDOR_ID_LSI_LOGIC, 330 PCI_SUBSYS_ID_MEGARAID_I4_133_RAID, 331 }, 332 { 333 PCI_VENDOR_ID_LSI_LOGIC, 334 PCI_DEVICE_ID_MEGARAID_SATA_150_4, 335 PCI_VENDOR_ID_LSI_LOGIC, 336 PCI_SUBSYS_ID_MEGARAID_SATA_150_4, 337 }, 338 { 339 PCI_VENDOR_ID_LSI_LOGIC, 340 PCI_DEVICE_ID_MEGARAID_SATA_150_6, 341 PCI_VENDOR_ID_LSI_LOGIC, 342 PCI_SUBSYS_ID_MEGARAID_SATA_150_6, 343 }, 344 { 345 PCI_VENDOR_ID_LSI_LOGIC, 346 PCI_DEVICE_ID_LINDSAY, 347 PCI_ANY_ID, 348 PCI_ANY_ID, 349 }, 350 { 351 PCI_VENDOR_ID_LSI_LOGIC, 352 PCI_DEVICE_ID_INTEL_RAID_SRCS16, 353 PCI_VENDOR_ID_INTEL, 354 PCI_SUBSYS_ID_INTEL_RAID_SRCS16, 355 }, 356 { 357 PCI_VENDOR_ID_LSI_LOGIC, 358 PCI_DEVICE_ID_INTEL_RAID_SRCU41L_LAKE_SHETEK, 359 PCI_VENDOR_ID_INTEL, 360 PCI_SUBSYS_ID_INTEL_RAID_SRCU41L_LAKE_SHETEK, 361 }, 362 {0} /* Terminating entry */ 363 }; 364 MODULE_DEVICE_TABLE(pci, pci_id_table_g); 365 366 367 static struct pci_driver megaraid_pci_driver_g = { 368 .name = "megaraid", 369 .id_table = pci_id_table_g, 370 .probe = megaraid_probe_one, 371 .remove = __devexit_p(megaraid_detach_one), 372 .driver = { 373 .shutdown = megaraid_mbox_shutdown, 374 } 375 }; 376 377 378 379 // definitions for the device attributes for exporting logical drive number 380 // for a scsi address (Host, Channel, Id, Lun) 381 382 CLASS_DEVICE_ATTR(megaraid_mbox_app_hndl, S_IRUSR, megaraid_sysfs_show_app_hndl, 383 NULL); 384 385 // Host template initializer for megaraid mbox sysfs device attributes 386 static struct class_device_attribute *megaraid_shost_attrs[] = { 387 &class_device_attr_megaraid_mbox_app_hndl, 388 NULL, 389 }; 390 391 392 DEVICE_ATTR(megaraid_mbox_ld, S_IRUSR, megaraid_sysfs_show_ldnum, NULL); 393 394 // Host template initializer for megaraid mbox sysfs device attributes 395 static struct device_attribute *megaraid_sdev_attrs[] = { 396 &dev_attr_megaraid_mbox_ld, 397 NULL, 398 }; 399 400 401 /* 402 * Scsi host template for megaraid unified driver 403 */ 404 static struct scsi_host_template megaraid_template_g = { 405 .module = THIS_MODULE, 406 .name = "LSI Logic MegaRAID driver", 407 .proc_name = "megaraid", 408 .queuecommand = megaraid_queue_command, 409 .eh_abort_handler = megaraid_abort_handler, 410 .eh_device_reset_handler = megaraid_reset_handler, 411 .eh_bus_reset_handler = megaraid_reset_handler, 412 .eh_host_reset_handler = megaraid_reset_handler, 413 .use_clustering = ENABLE_CLUSTERING, 414 .sdev_attrs = megaraid_sdev_attrs, 415 .shost_attrs = megaraid_shost_attrs, 416 }; 417 418 419 /** 420 * megaraid_init - module load hook 421 * 422 * We register ourselves as hotplug enabled module and let PCI subsystem 423 * discover our adaters 424 **/ 425 static int __init 426 megaraid_init(void) 427 { 428 int rval; 429 430 // Announce the driver version 431 con_log(CL_ANN, (KERN_INFO "megaraid: %s %s\n", MEGARAID_VERSION, 432 MEGARAID_EXT_VERSION)); 433 434 // check validity of module parameters 435 if (megaraid_cmd_per_lun > MBOX_MAX_SCSI_CMDS) { 436 437 con_log(CL_ANN, (KERN_WARNING 438 "megaraid mailbox: max commands per lun reset to %d\n", 439 MBOX_MAX_SCSI_CMDS)); 440 441 megaraid_cmd_per_lun = MBOX_MAX_SCSI_CMDS; 442 } 443 444 445 // register as a PCI hot-plug driver module 446 rval = pci_register_driver(&megaraid_pci_driver_g); 447 if (rval < 0) { 448 con_log(CL_ANN, (KERN_WARNING 449 "megaraid: could not register hotplug support.\n")); 450 } 451 452 return rval; 453 } 454 455 456 /** 457 * megaraid_exit - driver unload entry point 458 * 459 * We simply unwrap the megaraid_init routine here 460 */ 461 static void __exit 462 megaraid_exit(void) 463 { 464 con_log(CL_DLEVEL1, (KERN_NOTICE "megaraid: unloading framework\n")); 465 466 // unregister as PCI hotplug driver 467 pci_unregister_driver(&megaraid_pci_driver_g); 468 469 return; 470 } 471 472 473 /** 474 * megaraid_probe_one - PCI hotplug entry point 475 * @param pdev : handle to this controller's PCI configuration space 476 * @param id : pci device id of the class of controllers 477 * 478 * This routine should be called whenever a new adapter is detected by the 479 * PCI hotplug susbsytem. 480 **/ 481 static int __devinit 482 megaraid_probe_one(struct pci_dev *pdev, const struct pci_device_id *id) 483 { 484 adapter_t *adapter; 485 486 487 // detected a new controller 488 con_log(CL_ANN, (KERN_INFO 489 "megaraid: probe new device %#4.04x:%#4.04x:%#4.04x:%#4.04x: ", 490 pdev->vendor, pdev->device, pdev->subsystem_vendor, 491 pdev->subsystem_device)); 492 493 con_log(CL_ANN, ("bus %d:slot %d:func %d\n", pdev->bus->number, 494 PCI_SLOT(pdev->devfn), PCI_FUNC(pdev->devfn))); 495 496 if (pci_enable_device(pdev)) { 497 con_log(CL_ANN, (KERN_WARNING 498 "megaraid: pci_enable_device failed\n")); 499 500 return -ENODEV; 501 } 502 503 // Enable bus-mastering on this controller 504 pci_set_master(pdev); 505 506 // Allocate the per driver initialization structure 507 adapter = kmalloc(sizeof(adapter_t), GFP_KERNEL); 508 509 if (adapter == NULL) { 510 con_log(CL_ANN, (KERN_WARNING 511 "megaraid: out of memory, %s %d.\n", __FUNCTION__, __LINE__)); 512 513 goto out_probe_one; 514 } 515 memset(adapter, 0, sizeof(adapter_t)); 516 517 518 // set up PCI related soft state and other pre-known parameters 519 adapter->unique_id = pdev->bus->number << 8 | pdev->devfn; 520 adapter->irq = pdev->irq; 521 adapter->pdev = pdev; 522 523 atomic_set(&adapter->being_detached, 0); 524 525 // Setup the default DMA mask. This would be changed later on 526 // depending on hardware capabilities 527 if (pci_set_dma_mask(adapter->pdev, DMA_32BIT_MASK) != 0) { 528 529 con_log(CL_ANN, (KERN_WARNING 530 "megaraid: pci_set_dma_mask failed:%d\n", __LINE__)); 531 532 goto out_free_adapter; 533 } 534 535 536 // Initialize the synchronization lock for kernel and LLD 537 spin_lock_init(&adapter->lock); 538 adapter->host_lock = &adapter->lock; 539 540 541 // Initialize the command queues: the list of free SCBs and the list 542 // of pending SCBs. 543 INIT_LIST_HEAD(&adapter->kscb_pool); 544 spin_lock_init(SCSI_FREE_LIST_LOCK(adapter)); 545 546 INIT_LIST_HEAD(&adapter->pend_list); 547 spin_lock_init(PENDING_LIST_LOCK(adapter)); 548 549 INIT_LIST_HEAD(&adapter->completed_list); 550 spin_lock_init(COMPLETED_LIST_LOCK(adapter)); 551 552 553 // Start the mailbox based controller 554 if (megaraid_init_mbox(adapter) != 0) { 555 con_log(CL_ANN, (KERN_WARNING 556 "megaraid: maibox adapter did not initialize\n")); 557 558 goto out_free_adapter; 559 } 560 561 // Register with LSI Common Management Module 562 if (megaraid_cmm_register(adapter) != 0) { 563 564 con_log(CL_ANN, (KERN_WARNING 565 "megaraid: could not register with management module\n")); 566 567 goto out_fini_mbox; 568 } 569 570 // setup adapter handle in PCI soft state 571 pci_set_drvdata(pdev, adapter); 572 573 // attach with scsi mid-layer 574 if (megaraid_io_attach(adapter) != 0) { 575 576 con_log(CL_ANN, (KERN_WARNING "megaraid: io attach failed\n")); 577 578 goto out_cmm_unreg; 579 } 580 581 return 0; 582 583 out_cmm_unreg: 584 pci_set_drvdata(pdev, NULL); 585 megaraid_cmm_unregister(adapter); 586 out_fini_mbox: 587 megaraid_fini_mbox(adapter); 588 out_free_adapter: 589 kfree(adapter); 590 out_probe_one: 591 pci_disable_device(pdev); 592 593 return -ENODEV; 594 } 595 596 597 /** 598 * megaraid_detach_one - release the framework resources and call LLD release 599 * routine 600 * @param pdev : handle for our PCI cofiguration space 601 * 602 * This routine is called during driver unload. We free all the allocated 603 * resources and call the corresponding LLD so that it can also release all 604 * its resources. 605 * 606 * This routine is also called from the PCI hotplug system 607 **/ 608 static void 609 megaraid_detach_one(struct pci_dev *pdev) 610 { 611 adapter_t *adapter; 612 struct Scsi_Host *host; 613 614 615 // Start a rollback on this adapter 616 adapter = pci_get_drvdata(pdev); 617 618 if (!adapter) { 619 con_log(CL_ANN, (KERN_CRIT 620 "megaraid: Invalid detach on %#4.04x:%#4.04x:%#4.04x:%#4.04x\n", 621 pdev->vendor, pdev->device, pdev->subsystem_vendor, 622 pdev->subsystem_device)); 623 624 return; 625 } 626 else { 627 con_log(CL_ANN, (KERN_NOTICE 628 "megaraid: detaching device %#4.04x:%#4.04x:%#4.04x:%#4.04x\n", 629 pdev->vendor, pdev->device, pdev->subsystem_vendor, 630 pdev->subsystem_device)); 631 } 632 633 634 host = adapter->host; 635 636 // do not allow any more requests from the management module for this 637 // adapter. 638 // FIXME: How do we account for the request which might still be 639 // pending with us? 640 atomic_set(&adapter->being_detached, 1); 641 642 // detach from the IO sub-system 643 megaraid_io_detach(adapter); 644 645 // reset the device state in the PCI structure. We check this 646 // condition when we enter here. If the device state is NULL, 647 // that would mean the device has already been removed 648 pci_set_drvdata(pdev, NULL); 649 650 // Unregister from common management module 651 // 652 // FIXME: this must return success or failure for conditions if there 653 // is a command pending with LLD or not. 654 megaraid_cmm_unregister(adapter); 655 656 // finalize the mailbox based controller and release all resources 657 megaraid_fini_mbox(adapter); 658 659 kfree(adapter); 660 661 scsi_host_put(host); 662 663 pci_disable_device(pdev); 664 665 return; 666 } 667 668 669 /** 670 * megaraid_mbox_shutdown - PCI shutdown for megaraid HBA 671 * @param device : generice driver model device 672 * 673 * Shutdown notification, perform flush cache 674 */ 675 static void 676 megaraid_mbox_shutdown(struct device *device) 677 { 678 adapter_t *adapter = pci_get_drvdata(to_pci_dev(device)); 679 static int counter; 680 681 if (!adapter) { 682 con_log(CL_ANN, (KERN_WARNING 683 "megaraid: null device in shutdown\n")); 684 return; 685 } 686 687 // flush caches now 688 con_log(CL_ANN, (KERN_INFO "megaraid: flushing adapter %d...", 689 counter++)); 690 691 megaraid_mbox_flush_cache(adapter); 692 693 con_log(CL_ANN, ("done\n")); 694 } 695 696 697 /** 698 * megaraid_io_attach - attach a device with the IO subsystem 699 * @param adapter : controller's soft state 700 * 701 * Attach this device with the IO subsystem 702 **/ 703 static int 704 megaraid_io_attach(adapter_t *adapter) 705 { 706 struct Scsi_Host *host; 707 708 // Initialize SCSI Host structure 709 host = scsi_host_alloc(&megaraid_template_g, 8); 710 if (!host) { 711 con_log(CL_ANN, (KERN_WARNING 712 "megaraid mbox: scsi_register failed\n")); 713 714 return -1; 715 } 716 717 SCSIHOST2ADAP(host) = (caddr_t)adapter; 718 adapter->host = host; 719 720 // export the parameters required by the mid-layer 721 scsi_assign_lock(host, adapter->host_lock); 722 scsi_set_device(host, &adapter->pdev->dev); 723 724 host->irq = adapter->irq; 725 host->unique_id = adapter->unique_id; 726 host->can_queue = adapter->max_cmds; 727 host->this_id = adapter->init_id; 728 host->sg_tablesize = adapter->sglen; 729 host->max_sectors = adapter->max_sectors; 730 host->cmd_per_lun = adapter->cmd_per_lun; 731 host->max_channel = adapter->max_channel; 732 host->max_id = adapter->max_target; 733 host->max_lun = adapter->max_lun; 734 735 736 // notify mid-layer about the new controller 737 if (scsi_add_host(host, &adapter->pdev->dev)) { 738 739 con_log(CL_ANN, (KERN_WARNING 740 "megaraid mbox: scsi_add_host failed\n")); 741 742 scsi_host_put(host); 743 744 return -1; 745 } 746 747 scsi_scan_host(host); 748 749 return 0; 750 } 751 752 753 /** 754 * megaraid_io_detach - detach a device from the IO subsystem 755 * @param adapter : controller's soft state 756 * 757 * Detach this device from the IO subsystem 758 **/ 759 static void 760 megaraid_io_detach(adapter_t *adapter) 761 { 762 struct Scsi_Host *host; 763 764 con_log(CL_DLEVEL1, (KERN_INFO "megaraid: io detach\n")); 765 766 host = adapter->host; 767 768 scsi_remove_host(host); 769 770 return; 771 } 772 773 774 /* 775 * START: Mailbox Low Level Driver 776 * 777 * This is section specific to the single mailbox based controllers 778 */ 779 780 /** 781 * megaraid_init_mbox - initialize controller 782 * @param adapter - our soft state 783 * 784 * . Allocate 16-byte aligned mailbox memory for firmware handshake 785 * . Allocate controller's memory resources 786 * . Find out all initialization data 787 * . Allocate memory required for all the commands 788 * . Use internal library of FW routines, build up complete soft state 789 */ 790 static int __init 791 megaraid_init_mbox(adapter_t *adapter) 792 { 793 struct pci_dev *pdev; 794 mraid_device_t *raid_dev; 795 int i; 796 797 798 adapter->ito = MBOX_TIMEOUT; 799 pdev = adapter->pdev; 800 801 /* 802 * Allocate and initialize the init data structure for mailbox 803 * controllers 804 */ 805 raid_dev = kmalloc(sizeof(mraid_device_t), GFP_KERNEL); 806 if (raid_dev == NULL) return -1; 807 808 memset(raid_dev, 0, sizeof(mraid_device_t)); 809 810 /* 811 * Attach the adapter soft state to raid device soft state 812 */ 813 adapter->raid_device = (caddr_t)raid_dev; 814 raid_dev->fast_load = megaraid_fast_load; 815 816 817 // our baseport 818 raid_dev->baseport = pci_resource_start(pdev, 0); 819 820 if (pci_request_regions(pdev, "MegaRAID: LSI Logic Corporation") != 0) { 821 822 con_log(CL_ANN, (KERN_WARNING 823 "megaraid: mem region busy\n")); 824 825 goto out_free_raid_dev; 826 } 827 828 raid_dev->baseaddr = ioremap_nocache(raid_dev->baseport, 128); 829 830 if (!raid_dev->baseaddr) { 831 832 con_log(CL_ANN, (KERN_WARNING 833 "megaraid: could not map hba memory\n") ); 834 835 goto out_release_regions; 836 } 837 838 // 839 // Setup the rest of the soft state using the library of FW routines 840 // 841 842 // request IRQ and register the interrupt service routine 843 if (request_irq(adapter->irq, megaraid_isr, SA_SHIRQ, "megaraid", 844 adapter)) { 845 846 con_log(CL_ANN, (KERN_WARNING 847 "megaraid: Couldn't register IRQ %d!\n", adapter->irq)); 848 849 goto out_iounmap; 850 } 851 852 853 // initialize the mutual exclusion lock for the mailbox 854 spin_lock_init(&raid_dev->mailbox_lock); 855 856 // allocate memory required for commands 857 if (megaraid_alloc_cmd_packets(adapter) != 0) { 858 goto out_free_irq; 859 } 860 861 // Product info 862 if (megaraid_mbox_product_info(adapter) != 0) { 863 goto out_alloc_cmds; 864 } 865 866 // Do we support extended CDBs 867 adapter->max_cdb_sz = 10; 868 if (megaraid_mbox_extended_cdb(adapter) == 0) { 869 adapter->max_cdb_sz = 16; 870 } 871 872 /* 873 * Do we support cluster environment, if we do, what is the initiator 874 * id. 875 * NOTE: In a non-cluster aware firmware environment, the LLD should 876 * return 7 as initiator id. 877 */ 878 adapter->ha = 0; 879 adapter->init_id = -1; 880 if (megaraid_mbox_support_ha(adapter, &adapter->init_id) == 0) { 881 adapter->ha = 1; 882 } 883 884 /* 885 * Prepare the device ids array to have the mapping between the kernel 886 * device address and megaraid device address. 887 * We export the physical devices on their actual addresses. The 888 * logical drives are exported on a virtual SCSI channel 889 */ 890 megaraid_mbox_setup_device_map(adapter); 891 892 // If the firmware supports random deletion, update the device id map 893 if (megaraid_mbox_support_random_del(adapter)) { 894 895 // Change the logical drives numbers in device_ids array one 896 // slot in device_ids is reserved for target id, that's why 897 // "<=" below 898 for (i = 0; i <= MAX_LOGICAL_DRIVES_40LD; i++) { 899 adapter->device_ids[adapter->max_channel][i] += 0x80; 900 } 901 adapter->device_ids[adapter->max_channel][adapter->init_id] = 902 0xFF; 903 904 raid_dev->random_del_supported = 1; 905 } 906 907 /* 908 * find out the maximum number of scatter-gather elements supported by 909 * this firmware 910 */ 911 adapter->sglen = megaraid_mbox_get_max_sg(adapter); 912 913 // enumerate RAID and SCSI channels so that all devices on SCSI 914 // channels can later be exported, including disk devices 915 megaraid_mbox_enum_raid_scsi(adapter); 916 917 /* 918 * Other parameters required by upper layer 919 * 920 * maximum number of sectors per IO command 921 */ 922 adapter->max_sectors = megaraid_max_sectors; 923 924 /* 925 * number of queued commands per LUN. 926 */ 927 adapter->cmd_per_lun = megaraid_cmd_per_lun; 928 929 /* 930 * Allocate resources required to issue FW calls, when sysfs is 931 * accessed 932 */ 933 if (megaraid_sysfs_alloc_resources(adapter) != 0) { 934 goto out_alloc_cmds; 935 } 936 937 // Set the DMA mask to 64-bit. All supported controllers as capable of 938 // DMA in this range 939 if (pci_set_dma_mask(adapter->pdev, DMA_64BIT_MASK) != 0) { 940 941 con_log(CL_ANN, (KERN_WARNING 942 "megaraid: could not set DMA mask for 64-bit.\n")); 943 944 goto out_free_sysfs_res; 945 } 946 947 // setup tasklet for DPC 948 tasklet_init(&adapter->dpc_h, megaraid_mbox_dpc, 949 (unsigned long)adapter); 950 951 con_log(CL_DLEVEL1, (KERN_INFO 952 "megaraid mbox hba successfully initialized\n")); 953 954 return 0; 955 956 out_free_sysfs_res: 957 megaraid_sysfs_free_resources(adapter); 958 out_alloc_cmds: 959 megaraid_free_cmd_packets(adapter); 960 out_free_irq: 961 free_irq(adapter->irq, adapter); 962 out_iounmap: 963 iounmap(raid_dev->baseaddr); 964 out_release_regions: 965 pci_release_regions(pdev); 966 out_free_raid_dev: 967 kfree(raid_dev); 968 969 return -1; 970 } 971 972 973 /** 974 * megaraid_fini_mbox - undo controller initialization 975 * @param adapter : our soft state 976 */ 977 static void 978 megaraid_fini_mbox(adapter_t *adapter) 979 { 980 mraid_device_t *raid_dev = ADAP2RAIDDEV(adapter); 981 982 // flush all caches 983 megaraid_mbox_flush_cache(adapter); 984 985 tasklet_kill(&adapter->dpc_h); 986 987 megaraid_sysfs_free_resources(adapter); 988 989 megaraid_free_cmd_packets(adapter); 990 991 free_irq(adapter->irq, adapter); 992 993 iounmap(raid_dev->baseaddr); 994 995 pci_release_regions(adapter->pdev); 996 997 kfree(raid_dev); 998 999 return; 1000 } 1001 1002 1003 /** 1004 * megaraid_alloc_cmd_packets - allocate shared mailbox 1005 * @param adapter : soft state of the raid controller 1006 * 1007 * Allocate and align the shared mailbox. This maibox is used to issue 1008 * all the commands. For IO based controllers, the mailbox is also regsitered 1009 * with the FW. Allocate memory for all commands as well. 1010 * This is our big allocator 1011 */ 1012 static int 1013 megaraid_alloc_cmd_packets(adapter_t *adapter) 1014 { 1015 mraid_device_t *raid_dev = ADAP2RAIDDEV(adapter); 1016 struct pci_dev *pdev; 1017 unsigned long align; 1018 scb_t *scb; 1019 mbox_ccb_t *ccb; 1020 struct mraid_pci_blk *epthru_pci_blk; 1021 struct mraid_pci_blk *sg_pci_blk; 1022 struct mraid_pci_blk *mbox_pci_blk; 1023 int i; 1024 1025 pdev = adapter->pdev; 1026 1027 /* 1028 * Setup the mailbox 1029 * Allocate the common 16-byte aligned memory for the handshake 1030 * mailbox. 1031 */ 1032 raid_dev->una_mbox64 = pci_alloc_consistent(adapter->pdev, 1033 sizeof(mbox64_t), &raid_dev->una_mbox64_dma); 1034 1035 if (!raid_dev->una_mbox64) { 1036 con_log(CL_ANN, (KERN_WARNING 1037 "megaraid: out of memory, %s %d\n", __FUNCTION__, 1038 __LINE__)); 1039 return -1; 1040 } 1041 memset(raid_dev->una_mbox64, 0, sizeof(mbox64_t)); 1042 1043 /* 1044 * Align the mailbox at 16-byte boundary 1045 */ 1046 raid_dev->mbox = &raid_dev->una_mbox64->mbox32; 1047 1048 raid_dev->mbox = (mbox_t *)((((unsigned long)raid_dev->mbox) + 15) & 1049 (~0UL ^ 0xFUL)); 1050 1051 raid_dev->mbox64 = (mbox64_t *)(((unsigned long)raid_dev->mbox) - 8); 1052 1053 align = ((void *)raid_dev->mbox - 1054 ((void *)&raid_dev->una_mbox64->mbox32)); 1055 1056 raid_dev->mbox_dma = (unsigned long)raid_dev->una_mbox64_dma + 8 + 1057 align; 1058 1059 // Allocate memory for commands issued internally 1060 adapter->ibuf = pci_alloc_consistent(pdev, MBOX_IBUF_SIZE, 1061 &adapter->ibuf_dma_h); 1062 if (!adapter->ibuf) { 1063 1064 con_log(CL_ANN, (KERN_WARNING 1065 "megaraid: out of memory, %s %d\n", __FUNCTION__, 1066 __LINE__)); 1067 1068 goto out_free_common_mbox; 1069 } 1070 memset(adapter->ibuf, 0, MBOX_IBUF_SIZE); 1071 1072 // Allocate memory for our SCSI Command Blocks and their associated 1073 // memory 1074 1075 /* 1076 * Allocate memory for the base list of scb. Later allocate memory for 1077 * CCBs and embedded components of each CCB and point the pointers in 1078 * scb to the allocated components 1079 * NOTE: The code to allocate SCB will be duplicated in all the LLD 1080 * since the calling routine does not yet know the number of available 1081 * commands. 1082 */ 1083 adapter->kscb_list = kmalloc(sizeof(scb_t) * MBOX_MAX_SCSI_CMDS, 1084 GFP_KERNEL); 1085 1086 if (adapter->kscb_list == NULL) { 1087 con_log(CL_ANN, (KERN_WARNING 1088 "megaraid: out of memory, %s %d\n", __FUNCTION__, 1089 __LINE__)); 1090 goto out_free_ibuf; 1091 } 1092 memset(adapter->kscb_list, 0, sizeof(scb_t) * MBOX_MAX_SCSI_CMDS); 1093 1094 // memory allocation for our command packets 1095 if (megaraid_mbox_setup_dma_pools(adapter) != 0) { 1096 con_log(CL_ANN, (KERN_WARNING 1097 "megaraid: out of memory, %s %d\n", __FUNCTION__, 1098 __LINE__)); 1099 goto out_free_scb_list; 1100 } 1101 1102 // Adjust the scb pointers and link in the free pool 1103 epthru_pci_blk = raid_dev->epthru_pool; 1104 sg_pci_blk = raid_dev->sg_pool; 1105 mbox_pci_blk = raid_dev->mbox_pool; 1106 1107 for (i = 0; i < MBOX_MAX_SCSI_CMDS; i++) { 1108 scb = adapter->kscb_list + i; 1109 ccb = raid_dev->ccb_list + i; 1110 1111 ccb->mbox = (mbox_t *)(mbox_pci_blk[i].vaddr + 16); 1112 ccb->raw_mbox = (uint8_t *)ccb->mbox; 1113 ccb->mbox64 = (mbox64_t *)(mbox_pci_blk[i].vaddr + 8); 1114 ccb->mbox_dma_h = (unsigned long)mbox_pci_blk[i].dma_addr + 16; 1115 1116 // make sure the mailbox is aligned properly 1117 if (ccb->mbox_dma_h & 0x0F) { 1118 con_log(CL_ANN, (KERN_CRIT 1119 "megaraid mbox: not aligned on 16-bytes\n")); 1120 1121 goto out_teardown_dma_pools; 1122 } 1123 1124 ccb->epthru = (mraid_epassthru_t *) 1125 epthru_pci_blk[i].vaddr; 1126 ccb->epthru_dma_h = epthru_pci_blk[i].dma_addr; 1127 ccb->pthru = (mraid_passthru_t *)ccb->epthru; 1128 ccb->pthru_dma_h = ccb->epthru_dma_h; 1129 1130 1131 ccb->sgl64 = (mbox_sgl64 *)sg_pci_blk[i].vaddr; 1132 ccb->sgl_dma_h = sg_pci_blk[i].dma_addr; 1133 ccb->sgl32 = (mbox_sgl32 *)ccb->sgl64; 1134 1135 scb->ccb = (caddr_t)ccb; 1136 scb->gp = 0; 1137 1138 scb->sno = i; // command index 1139 1140 scb->scp = NULL; 1141 scb->state = SCB_FREE; 1142 scb->dma_direction = PCI_DMA_NONE; 1143 scb->dma_type = MRAID_DMA_NONE; 1144 scb->dev_channel = -1; 1145 scb->dev_target = -1; 1146 1147 // put scb in the free pool 1148 list_add_tail(&scb->list, &adapter->kscb_pool); 1149 } 1150 1151 return 0; 1152 1153 out_teardown_dma_pools: 1154 megaraid_mbox_teardown_dma_pools(adapter); 1155 out_free_scb_list: 1156 kfree(adapter->kscb_list); 1157 out_free_ibuf: 1158 pci_free_consistent(pdev, MBOX_IBUF_SIZE, (void *)adapter->ibuf, 1159 adapter->ibuf_dma_h); 1160 out_free_common_mbox: 1161 pci_free_consistent(adapter->pdev, sizeof(mbox64_t), 1162 (caddr_t)raid_dev->una_mbox64, raid_dev->una_mbox64_dma); 1163 1164 return -1; 1165 } 1166 1167 1168 /** 1169 * megaraid_free_cmd_packets - free memory 1170 * @param adapter : soft state of the raid controller 1171 * 1172 * Release memory resources allocated for commands 1173 */ 1174 static void 1175 megaraid_free_cmd_packets(adapter_t *adapter) 1176 { 1177 mraid_device_t *raid_dev = ADAP2RAIDDEV(adapter); 1178 1179 megaraid_mbox_teardown_dma_pools(adapter); 1180 1181 kfree(adapter->kscb_list); 1182 1183 pci_free_consistent(adapter->pdev, MBOX_IBUF_SIZE, 1184 (void *)adapter->ibuf, adapter->ibuf_dma_h); 1185 1186 pci_free_consistent(adapter->pdev, sizeof(mbox64_t), 1187 (caddr_t)raid_dev->una_mbox64, raid_dev->una_mbox64_dma); 1188 return; 1189 } 1190 1191 1192 /** 1193 * megaraid_mbox_setup_dma_pools - setup dma pool for command packets 1194 * @param adapter : HBA soft state 1195 * 1196 * setup the dma pools for mailbox, passthru and extended passthru structures, 1197 * and scatter-gather lists 1198 */ 1199 static int 1200 megaraid_mbox_setup_dma_pools(adapter_t *adapter) 1201 { 1202 mraid_device_t *raid_dev = ADAP2RAIDDEV(adapter); 1203 struct mraid_pci_blk *epthru_pci_blk; 1204 struct mraid_pci_blk *sg_pci_blk; 1205 struct mraid_pci_blk *mbox_pci_blk; 1206 int i; 1207 1208 1209 1210 // Allocate memory for 16-bytes aligned mailboxes 1211 raid_dev->mbox_pool_handle = pci_pool_create("megaraid mbox pool", 1212 adapter->pdev, 1213 sizeof(mbox64_t) + 16, 1214 16, 0); 1215 1216 if (raid_dev->mbox_pool_handle == NULL) { 1217 goto fail_setup_dma_pool; 1218 } 1219 1220 mbox_pci_blk = raid_dev->mbox_pool; 1221 for (i = 0; i < MBOX_MAX_SCSI_CMDS; i++) { 1222 mbox_pci_blk[i].vaddr = pci_pool_alloc( 1223 raid_dev->mbox_pool_handle, 1224 GFP_KERNEL, 1225 &mbox_pci_blk[i].dma_addr); 1226 if (!mbox_pci_blk[i].vaddr) { 1227 goto fail_setup_dma_pool; 1228 } 1229 } 1230 1231 /* 1232 * Allocate memory for each embedded passthru strucuture pointer 1233 * Request for a 128 bytes aligned structure for each passthru command 1234 * structure 1235 * Since passthru and extended passthru commands are exclusive, they 1236 * share common memory pool. Passthru structures piggyback on memory 1237 * allocted to extended passthru since passthru is smaller of the two 1238 */ 1239 raid_dev->epthru_pool_handle = pci_pool_create("megaraid mbox pthru", 1240 adapter->pdev, sizeof(mraid_epassthru_t), 128, 0); 1241 1242 if (raid_dev->epthru_pool_handle == NULL) { 1243 goto fail_setup_dma_pool; 1244 } 1245 1246 epthru_pci_blk = raid_dev->epthru_pool; 1247 for (i = 0; i < MBOX_MAX_SCSI_CMDS; i++) { 1248 epthru_pci_blk[i].vaddr = pci_pool_alloc( 1249 raid_dev->epthru_pool_handle, 1250 GFP_KERNEL, 1251 &epthru_pci_blk[i].dma_addr); 1252 if (!epthru_pci_blk[i].vaddr) { 1253 goto fail_setup_dma_pool; 1254 } 1255 } 1256 1257 1258 // Allocate memory for each scatter-gather list. Request for 512 bytes 1259 // alignment for each sg list 1260 raid_dev->sg_pool_handle = pci_pool_create("megaraid mbox sg", 1261 adapter->pdev, 1262 sizeof(mbox_sgl64) * MBOX_MAX_SG_SIZE, 1263 512, 0); 1264 1265 if (raid_dev->sg_pool_handle == NULL) { 1266 goto fail_setup_dma_pool; 1267 } 1268 1269 sg_pci_blk = raid_dev->sg_pool; 1270 for (i = 0; i < MBOX_MAX_SCSI_CMDS; i++) { 1271 sg_pci_blk[i].vaddr = pci_pool_alloc( 1272 raid_dev->sg_pool_handle, 1273 GFP_KERNEL, 1274 &sg_pci_blk[i].dma_addr); 1275 if (!sg_pci_blk[i].vaddr) { 1276 goto fail_setup_dma_pool; 1277 } 1278 } 1279 1280 return 0; 1281 1282 fail_setup_dma_pool: 1283 megaraid_mbox_teardown_dma_pools(adapter); 1284 return -1; 1285 } 1286 1287 1288 /** 1289 * megaraid_mbox_teardown_dma_pools - teardown dma pools for command packets 1290 * @param adapter : HBA soft state 1291 * 1292 * teardown the dma pool for mailbox, passthru and extended passthru 1293 * structures, and scatter-gather lists 1294 */ 1295 static void 1296 megaraid_mbox_teardown_dma_pools(adapter_t *adapter) 1297 { 1298 mraid_device_t *raid_dev = ADAP2RAIDDEV(adapter); 1299 struct mraid_pci_blk *epthru_pci_blk; 1300 struct mraid_pci_blk *sg_pci_blk; 1301 struct mraid_pci_blk *mbox_pci_blk; 1302 int i; 1303 1304 1305 sg_pci_blk = raid_dev->sg_pool; 1306 for (i = 0; i < MBOX_MAX_SCSI_CMDS && sg_pci_blk[i].vaddr; i++) { 1307 pci_pool_free(raid_dev->sg_pool_handle, sg_pci_blk[i].vaddr, 1308 sg_pci_blk[i].dma_addr); 1309 } 1310 if (raid_dev->sg_pool_handle) 1311 pci_pool_destroy(raid_dev->sg_pool_handle); 1312 1313 1314 epthru_pci_blk = raid_dev->epthru_pool; 1315 for (i = 0; i < MBOX_MAX_SCSI_CMDS && epthru_pci_blk[i].vaddr; i++) { 1316 pci_pool_free(raid_dev->epthru_pool_handle, 1317 epthru_pci_blk[i].vaddr, epthru_pci_blk[i].dma_addr); 1318 } 1319 if (raid_dev->epthru_pool_handle) 1320 pci_pool_destroy(raid_dev->epthru_pool_handle); 1321 1322 1323 mbox_pci_blk = raid_dev->mbox_pool; 1324 for (i = 0; i < MBOX_MAX_SCSI_CMDS && mbox_pci_blk[i].vaddr; i++) { 1325 pci_pool_free(raid_dev->mbox_pool_handle, 1326 mbox_pci_blk[i].vaddr, mbox_pci_blk[i].dma_addr); 1327 } 1328 if (raid_dev->mbox_pool_handle) 1329 pci_pool_destroy(raid_dev->mbox_pool_handle); 1330 1331 return; 1332 } 1333 1334 1335 /** 1336 * megaraid_alloc_scb - detach and return a scb from the free list 1337 * @adapter : controller's soft state 1338 * 1339 * return the scb from the head of the free list. NULL if there are none 1340 * available 1341 **/ 1342 static inline scb_t * 1343 megaraid_alloc_scb(adapter_t *adapter, struct scsi_cmnd *scp) 1344 { 1345 struct list_head *head = &adapter->kscb_pool; 1346 scb_t *scb = NULL; 1347 unsigned long flags; 1348 1349 // detach scb from free pool 1350 spin_lock_irqsave(SCSI_FREE_LIST_LOCK(adapter), flags); 1351 1352 if (list_empty(head)) { 1353 spin_unlock_irqrestore(SCSI_FREE_LIST_LOCK(adapter), flags); 1354 return NULL; 1355 } 1356 1357 scb = list_entry(head->next, scb_t, list); 1358 list_del_init(&scb->list); 1359 1360 spin_unlock_irqrestore(SCSI_FREE_LIST_LOCK(adapter), flags); 1361 1362 scb->state = SCB_ACTIVE; 1363 scb->scp = scp; 1364 scb->dma_type = MRAID_DMA_NONE; 1365 1366 return scb; 1367 } 1368 1369 1370 /** 1371 * megaraid_dealloc_scb - return the scb to the free pool 1372 * @adapter : controller's soft state 1373 * @scb : scb to be freed 1374 * 1375 * return the scb back to the free list of scbs. The caller must 'flush' the 1376 * SCB before calling us. E.g., performing pci_unamp and/or pci_sync etc. 1377 * NOTE NOTE: Make sure the scb is not on any list before calling this 1378 * routine. 1379 **/ 1380 static inline void 1381 megaraid_dealloc_scb(adapter_t *adapter, scb_t *scb) 1382 { 1383 unsigned long flags; 1384 1385 // put scb in the free pool 1386 scb->state = SCB_FREE; 1387 scb->scp = NULL; 1388 spin_lock_irqsave(SCSI_FREE_LIST_LOCK(adapter), flags); 1389 1390 list_add(&scb->list, &adapter->kscb_pool); 1391 1392 spin_unlock_irqrestore(SCSI_FREE_LIST_LOCK(adapter), flags); 1393 1394 return; 1395 } 1396 1397 1398 /** 1399 * megaraid_mbox_mksgl - make the scatter-gather list 1400 * @adapter - controller's soft state 1401 * @scb - scsi control block 1402 * 1403 * prepare the scatter-gather list 1404 */ 1405 static inline int 1406 megaraid_mbox_mksgl(adapter_t *adapter, scb_t *scb) 1407 { 1408 struct scatterlist *sgl; 1409 mbox_ccb_t *ccb; 1410 struct page *page; 1411 unsigned long offset; 1412 struct scsi_cmnd *scp; 1413 int sgcnt; 1414 int i; 1415 1416 1417 scp = scb->scp; 1418 ccb = (mbox_ccb_t *)scb->ccb; 1419 1420 // no mapping required if no data to be transferred 1421 if (!scp->request_buffer || !scp->request_bufflen) 1422 return 0; 1423 1424 if (!scp->use_sg) { /* scatter-gather list not used */ 1425 1426 page = virt_to_page(scp->request_buffer); 1427 1428 offset = ((unsigned long)scp->request_buffer & ~PAGE_MASK); 1429 1430 ccb->buf_dma_h = pci_map_page(adapter->pdev, page, offset, 1431 scp->request_bufflen, 1432 scb->dma_direction); 1433 scb->dma_type = MRAID_DMA_WBUF; 1434 1435 /* 1436 * We need to handle special 64-bit commands that need a 1437 * minimum of 1 SG 1438 */ 1439 sgcnt = 1; 1440 ccb->sgl64[0].address = ccb->buf_dma_h; 1441 ccb->sgl64[0].length = scp->request_bufflen; 1442 1443 return sgcnt; 1444 } 1445 1446 sgl = (struct scatterlist *)scp->request_buffer; 1447 1448 // The number of sg elements returned must not exceed our limit 1449 sgcnt = pci_map_sg(adapter->pdev, sgl, scp->use_sg, 1450 scb->dma_direction); 1451 1452 if (sgcnt > adapter->sglen) { 1453 con_log(CL_ANN, (KERN_CRIT 1454 "megaraid critical: too many sg elements:%d\n", 1455 sgcnt)); 1456 BUG(); 1457 } 1458 1459 scb->dma_type = MRAID_DMA_WSG; 1460 1461 for (i = 0; i < sgcnt; i++, sgl++) { 1462 ccb->sgl64[i].address = sg_dma_address(sgl); 1463 ccb->sgl64[i].length = sg_dma_len(sgl); 1464 } 1465 1466 // Return count of SG nodes 1467 return sgcnt; 1468 } 1469 1470 1471 /** 1472 * mbox_post_cmd - issue a mailbox command 1473 * @adapter - controller's soft state 1474 * @scb - command to be issued 1475 * 1476 * post the command to the controller if mailbox is availble. 1477 */ 1478 static inline int 1479 mbox_post_cmd(adapter_t *adapter, scb_t *scb) 1480 { 1481 mraid_device_t *raid_dev = ADAP2RAIDDEV(adapter); 1482 mbox64_t *mbox64; 1483 mbox_t *mbox; 1484 mbox_ccb_t *ccb; 1485 unsigned long flags; 1486 unsigned int i = 0; 1487 1488 1489 ccb = (mbox_ccb_t *)scb->ccb; 1490 mbox = raid_dev->mbox; 1491 mbox64 = raid_dev->mbox64; 1492 1493 /* 1494 * Check for busy mailbox. If it is, return failure - the caller 1495 * should retry later. 1496 */ 1497 spin_lock_irqsave(MAILBOX_LOCK(raid_dev), flags); 1498 1499 if (unlikely(mbox->busy)) { 1500 do { 1501 udelay(1); 1502 i++; 1503 rmb(); 1504 } while(mbox->busy && (i < max_mbox_busy_wait)); 1505 1506 if (mbox->busy) { 1507 1508 spin_unlock_irqrestore(MAILBOX_LOCK(raid_dev), flags); 1509 1510 return -1; 1511 } 1512 } 1513 1514 1515 // Copy this command's mailbox data into "adapter's" mailbox 1516 memcpy((caddr_t)mbox64, (caddr_t)ccb->mbox64, 22); 1517 mbox->cmdid = scb->sno; 1518 1519 adapter->outstanding_cmds++; 1520 1521 if (scb->dma_direction == PCI_DMA_TODEVICE) { 1522 if (!scb->scp->use_sg) { // sg list not used 1523 pci_dma_sync_single_for_device(adapter->pdev, 1524 ccb->buf_dma_h, 1525 scb->scp->request_bufflen, 1526 PCI_DMA_TODEVICE); 1527 } 1528 else { 1529 pci_dma_sync_sg_for_device(adapter->pdev, 1530 scb->scp->request_buffer, 1531 scb->scp->use_sg, PCI_DMA_TODEVICE); 1532 } 1533 } 1534 1535 mbox->busy = 1; // Set busy 1536 mbox->poll = 0; 1537 mbox->ack = 0; 1538 wmb(); 1539 1540 WRINDOOR(raid_dev, raid_dev->mbox_dma | 0x1); 1541 1542 spin_unlock_irqrestore(MAILBOX_LOCK(raid_dev), flags); 1543 1544 return 0; 1545 } 1546 1547 1548 /** 1549 * megaraid_queue_command - generic queue entry point for all LLDs 1550 * @scp : pointer to the scsi command to be executed 1551 * @done : callback routine to be called after the cmd has be completed 1552 * 1553 * Queue entry point for mailbox based controllers. 1554 */ 1555 static int 1556 megaraid_queue_command(struct scsi_cmnd *scp, void (* done)(struct scsi_cmnd *)) 1557 { 1558 adapter_t *adapter; 1559 scb_t *scb; 1560 int if_busy; 1561 1562 adapter = SCP2ADAPTER(scp); 1563 scp->scsi_done = done; 1564 scp->result = 0; 1565 1566 assert_spin_locked(adapter->host_lock); 1567 1568 spin_unlock(adapter->host_lock); 1569 1570 /* 1571 * Allocate and build a SCB request 1572 * if_busy flag will be set if megaraid_mbox_build_cmd() command could 1573 * not allocate scb. We will return non-zero status in that case. 1574 * NOTE: scb can be null even though certain commands completed 1575 * successfully, e.g., MODE_SENSE and TEST_UNIT_READY, it would 1576 * return 0 in that case, and we would do the callback right away. 1577 */ 1578 if_busy = 0; 1579 scb = megaraid_mbox_build_cmd(adapter, scp, &if_busy); 1580 1581 if (scb) { 1582 megaraid_mbox_runpendq(adapter, scb); 1583 } 1584 1585 spin_lock(adapter->host_lock); 1586 1587 if (!scb) { // command already completed 1588 done(scp); 1589 return 0; 1590 } 1591 1592 return if_busy; 1593 } 1594 1595 1596 /** 1597 * megaraid_mbox_build_cmd - transform the mid-layer scsi command to megaraid 1598 * firmware lingua 1599 * @adapter - controller's soft state 1600 * @scp - mid-layer scsi command pointer 1601 * @busy - set if request could not be completed because of lack of 1602 * resources 1603 * 1604 * convert the command issued by mid-layer to format understood by megaraid 1605 * firmware. We also complete certain command without sending them to firmware 1606 */ 1607 static scb_t * 1608 megaraid_mbox_build_cmd(adapter_t *adapter, struct scsi_cmnd *scp, int *busy) 1609 { 1610 mraid_device_t *rdev = ADAP2RAIDDEV(adapter); 1611 int channel; 1612 int target; 1613 int islogical; 1614 mbox_ccb_t *ccb; 1615 mraid_passthru_t *pthru; 1616 mbox64_t *mbox64; 1617 mbox_t *mbox; 1618 scb_t *scb; 1619 char skip[] = "skipping"; 1620 char scan[] = "scanning"; 1621 char *ss; 1622 1623 1624 /* 1625 * Get the appropriate device map for the device this command is 1626 * intended for 1627 */ 1628 MRAID_GET_DEVICE_MAP(adapter, scp, channel, target, islogical); 1629 1630 /* 1631 * Logical drive commands 1632 */ 1633 if (islogical) { 1634 switch (scp->cmnd[0]) { 1635 case TEST_UNIT_READY: 1636 /* 1637 * Do we support clustering and is the support enabled 1638 * If no, return success always 1639 */ 1640 if (!adapter->ha) { 1641 scp->result = (DID_OK << 16); 1642 return NULL; 1643 } 1644 1645 if (!(scb = megaraid_alloc_scb(adapter, scp))) { 1646 scp->result = (DID_ERROR << 16); 1647 *busy = 1; 1648 return NULL; 1649 } 1650 1651 scb->dma_direction = scp->sc_data_direction; 1652 scb->dev_channel = 0xFF; 1653 scb->dev_target = target; 1654 ccb = (mbox_ccb_t *)scb->ccb; 1655 1656 /* 1657 * The command id will be provided by the command 1658 * issuance routine 1659 */ 1660 ccb->raw_mbox[0] = CLUSTER_CMD; 1661 ccb->raw_mbox[2] = RESERVATION_STATUS; 1662 ccb->raw_mbox[3] = target; 1663 1664 return scb; 1665 1666 case MODE_SENSE: 1667 if (scp->use_sg) { 1668 struct scatterlist *sgl; 1669 caddr_t vaddr; 1670 1671 sgl = (struct scatterlist *)scp->request_buffer; 1672 if (sgl->page) { 1673 vaddr = (caddr_t) 1674 (page_address((&sgl[0])->page) 1675 + (&sgl[0])->offset); 1676 1677 memset(vaddr, 0, scp->cmnd[4]); 1678 } 1679 else { 1680 con_log(CL_ANN, (KERN_WARNING 1681 "megaraid mailbox: invalid sg:%d\n", 1682 __LINE__)); 1683 } 1684 } 1685 else { 1686 memset(scp->request_buffer, 0, scp->cmnd[4]); 1687 } 1688 scp->result = (DID_OK << 16); 1689 return NULL; 1690 1691 case INQUIRY: 1692 /* 1693 * Display the channel scan for logical drives 1694 * Do not display scan for a channel if already done. 1695 */ 1696 if (!(rdev->last_disp & (1L << SCP2CHANNEL(scp)))) { 1697 1698 con_log(CL_ANN, (KERN_INFO 1699 "scsi[%d]: scanning scsi channel %d", 1700 adapter->host->host_no, 1701 SCP2CHANNEL(scp))); 1702 1703 con_log(CL_ANN, ( 1704 " [virtual] for logical drives\n")); 1705 1706 rdev->last_disp |= (1L << SCP2CHANNEL(scp)); 1707 } 1708 1709 /* Fall through */ 1710 1711 case READ_CAPACITY: 1712 /* 1713 * Do not allow LUN > 0 for logical drives and 1714 * requests for more than 40 logical drives 1715 */ 1716 if (SCP2LUN(scp)) { 1717 scp->result = (DID_BAD_TARGET << 16); 1718 return NULL; 1719 } 1720 if ((target % 0x80) >= MAX_LOGICAL_DRIVES_40LD) { 1721 scp->result = (DID_BAD_TARGET << 16); 1722 return NULL; 1723 } 1724 1725 1726 /* Allocate a SCB and initialize passthru */ 1727 if (!(scb = megaraid_alloc_scb(adapter, scp))) { 1728 scp->result = (DID_ERROR << 16); 1729 *busy = 1; 1730 return NULL; 1731 } 1732 1733 ccb = (mbox_ccb_t *)scb->ccb; 1734 scb->dev_channel = 0xFF; 1735 scb->dev_target = target; 1736 pthru = ccb->pthru; 1737 mbox = ccb->mbox; 1738 mbox64 = ccb->mbox64; 1739 1740 pthru->timeout = 0; 1741 pthru->ars = 1; 1742 pthru->reqsenselen = 14; 1743 pthru->islogical = 1; 1744 pthru->logdrv = target; 1745 pthru->cdblen = scp->cmd_len; 1746 memcpy(pthru->cdb, scp->cmnd, scp->cmd_len); 1747 1748 mbox->cmd = MBOXCMD_PASSTHRU64; 1749 scb->dma_direction = scp->sc_data_direction; 1750 1751 pthru->dataxferlen = scp->request_bufflen; 1752 pthru->dataxferaddr = ccb->sgl_dma_h; 1753 pthru->numsge = megaraid_mbox_mksgl(adapter, 1754 scb); 1755 1756 mbox->xferaddr = 0xFFFFFFFF; 1757 mbox64->xferaddr_lo = (uint32_t )ccb->pthru_dma_h; 1758 mbox64->xferaddr_hi = 0; 1759 1760 return scb; 1761 1762 case READ_6: 1763 case WRITE_6: 1764 case READ_10: 1765 case WRITE_10: 1766 case READ_12: 1767 case WRITE_12: 1768 1769 /* 1770 * Allocate a SCB and initialize mailbox 1771 */ 1772 if (!(scb = megaraid_alloc_scb(adapter, scp))) { 1773 scp->result = (DID_ERROR << 16); 1774 *busy = 1; 1775 return NULL; 1776 } 1777 ccb = (mbox_ccb_t *)scb->ccb; 1778 scb->dev_channel = 0xFF; 1779 scb->dev_target = target; 1780 mbox = ccb->mbox; 1781 mbox64 = ccb->mbox64; 1782 mbox->logdrv = target; 1783 1784 /* 1785 * A little HACK: 2nd bit is zero for all scsi read 1786 * commands and is set for all scsi write commands 1787 */ 1788 mbox->cmd = (scp->cmnd[0] & 0x02) ? MBOXCMD_LWRITE64: 1789 MBOXCMD_LREAD64 ; 1790 1791 /* 1792 * 6-byte READ(0x08) or WRITE(0x0A) cdb 1793 */ 1794 if (scp->cmd_len == 6) { 1795 mbox->numsectors = (uint32_t)scp->cmnd[4]; 1796 mbox->lba = 1797 ((uint32_t)scp->cmnd[1] << 16) | 1798 ((uint32_t)scp->cmnd[2] << 8) | 1799 (uint32_t)scp->cmnd[3]; 1800 1801 mbox->lba &= 0x1FFFFF; 1802 } 1803 1804 /* 1805 * 10-byte READ(0x28) or WRITE(0x2A) cdb 1806 */ 1807 else if (scp->cmd_len == 10) { 1808 mbox->numsectors = 1809 (uint32_t)scp->cmnd[8] | 1810 ((uint32_t)scp->cmnd[7] << 8); 1811 mbox->lba = 1812 ((uint32_t)scp->cmnd[2] << 24) | 1813 ((uint32_t)scp->cmnd[3] << 16) | 1814 ((uint32_t)scp->cmnd[4] << 8) | 1815 (uint32_t)scp->cmnd[5]; 1816 } 1817 1818 /* 1819 * 12-byte READ(0xA8) or WRITE(0xAA) cdb 1820 */ 1821 else if (scp->cmd_len == 12) { 1822 mbox->lba = 1823 ((uint32_t)scp->cmnd[2] << 24) | 1824 ((uint32_t)scp->cmnd[3] << 16) | 1825 ((uint32_t)scp->cmnd[4] << 8) | 1826 (uint32_t)scp->cmnd[5]; 1827 1828 mbox->numsectors = 1829 ((uint32_t)scp->cmnd[6] << 24) | 1830 ((uint32_t)scp->cmnd[7] << 16) | 1831 ((uint32_t)scp->cmnd[8] << 8) | 1832 (uint32_t)scp->cmnd[9]; 1833 } 1834 else { 1835 con_log(CL_ANN, (KERN_WARNING 1836 "megaraid: unsupported CDB length\n")); 1837 1838 megaraid_dealloc_scb(adapter, scb); 1839 1840 scp->result = (DID_ERROR << 16); 1841 return NULL; 1842 } 1843 1844 scb->dma_direction = scp->sc_data_direction; 1845 1846 // Calculate Scatter-Gather info 1847 mbox64->xferaddr_lo = (uint32_t )ccb->sgl_dma_h; 1848 mbox->numsge = megaraid_mbox_mksgl(adapter, 1849 scb); 1850 mbox->xferaddr = 0xFFFFFFFF; 1851 mbox64->xferaddr_hi = 0; 1852 1853 return scb; 1854 1855 case RESERVE: 1856 case RELEASE: 1857 /* 1858 * Do we support clustering and is the support enabled 1859 */ 1860 if (!adapter->ha) { 1861 scp->result = (DID_BAD_TARGET << 16); 1862 return NULL; 1863 } 1864 1865 /* 1866 * Allocate a SCB and initialize mailbox 1867 */ 1868 if (!(scb = megaraid_alloc_scb(adapter, scp))) { 1869 scp->result = (DID_ERROR << 16); 1870 *busy = 1; 1871 return NULL; 1872 } 1873 1874 ccb = (mbox_ccb_t *)scb->ccb; 1875 scb->dev_channel = 0xFF; 1876 scb->dev_target = target; 1877 ccb->raw_mbox[0] = CLUSTER_CMD; 1878 ccb->raw_mbox[2] = (scp->cmnd[0] == RESERVE) ? 1879 RESERVE_LD : RELEASE_LD; 1880 1881 ccb->raw_mbox[3] = target; 1882 scb->dma_direction = scp->sc_data_direction; 1883 1884 return scb; 1885 1886 default: 1887 scp->result = (DID_BAD_TARGET << 16); 1888 return NULL; 1889 } 1890 } 1891 else { // Passthru device commands 1892 1893 // Do not allow access to target id > 15 or LUN > 7 1894 if (target > 15 || SCP2LUN(scp) > 7) { 1895 scp->result = (DID_BAD_TARGET << 16); 1896 return NULL; 1897 } 1898 1899 // if fast load option was set and scan for last device is 1900 // over, reset the fast_load flag so that during a possible 1901 // next scan, devices can be made available 1902 if (rdev->fast_load && (target == 15) && 1903 (SCP2CHANNEL(scp) == adapter->max_channel -1)) { 1904 1905 con_log(CL_ANN, (KERN_INFO 1906 "megaraid[%d]: physical device scan re-enabled\n", 1907 adapter->host->host_no)); 1908 rdev->fast_load = 0; 1909 } 1910 1911 /* 1912 * Display the channel scan for physical devices 1913 */ 1914 if (!(rdev->last_disp & (1L << SCP2CHANNEL(scp)))) { 1915 1916 ss = rdev->fast_load ? skip : scan; 1917 1918 con_log(CL_ANN, (KERN_INFO 1919 "scsi[%d]: %s scsi channel %d [Phy %d]", 1920 adapter->host->host_no, ss, SCP2CHANNEL(scp), 1921 channel)); 1922 1923 con_log(CL_ANN, ( 1924 " for non-raid devices\n")); 1925 1926 rdev->last_disp |= (1L << SCP2CHANNEL(scp)); 1927 } 1928 1929 // disable channel sweep if fast load option given 1930 if (rdev->fast_load) { 1931 scp->result = (DID_BAD_TARGET << 16); 1932 return NULL; 1933 } 1934 1935 // Allocate a SCB and initialize passthru 1936 if (!(scb = megaraid_alloc_scb(adapter, scp))) { 1937 scp->result = (DID_ERROR << 16); 1938 *busy = 1; 1939 return NULL; 1940 } 1941 1942 ccb = (mbox_ccb_t *)scb->ccb; 1943 scb->dev_channel = channel; 1944 scb->dev_target = target; 1945 scb->dma_direction = scp->sc_data_direction; 1946 mbox = ccb->mbox; 1947 mbox64 = ccb->mbox64; 1948 1949 // Does this firmware support extended CDBs 1950 if (adapter->max_cdb_sz == 16) { 1951 mbox->cmd = MBOXCMD_EXTPTHRU; 1952 1953 megaraid_mbox_prepare_epthru(adapter, scb, scp); 1954 1955 mbox64->xferaddr_lo = (uint32_t)ccb->epthru_dma_h; 1956 mbox64->xferaddr_hi = 0; 1957 mbox->xferaddr = 0xFFFFFFFF; 1958 } 1959 else { 1960 mbox->cmd = MBOXCMD_PASSTHRU64; 1961 1962 megaraid_mbox_prepare_pthru(adapter, scb, scp); 1963 1964 mbox64->xferaddr_lo = (uint32_t)ccb->pthru_dma_h; 1965 mbox64->xferaddr_hi = 0; 1966 mbox->xferaddr = 0xFFFFFFFF; 1967 } 1968 return scb; 1969 } 1970 1971 // NOT REACHED 1972 } 1973 1974 1975 /** 1976 * megaraid_mbox_runpendq - execute commands queued in the pending queue 1977 * @adapter : controller's soft state 1978 * @scb : SCB to be queued in the pending list 1979 * 1980 * scan the pending list for commands which are not yet issued and try to 1981 * post to the controller. The SCB can be a null pointer, which would indicate 1982 * no SCB to be queue, just try to execute the ones in the pending list. 1983 * 1984 * NOTE: We do not actually traverse the pending list. The SCBs are plucked 1985 * out from the head of the pending list. If it is successfully issued, the 1986 * next SCB is at the head now. 1987 */ 1988 static void 1989 megaraid_mbox_runpendq(adapter_t *adapter, scb_t *scb_q) 1990 { 1991 scb_t *scb; 1992 unsigned long flags; 1993 1994 spin_lock_irqsave(PENDING_LIST_LOCK(adapter), flags); 1995 1996 if (scb_q) { 1997 scb_q->state = SCB_PENDQ; 1998 list_add_tail(&scb_q->list, &adapter->pend_list); 1999 } 2000 2001 // if the adapter in not in quiescent mode, post the commands to FW 2002 if (adapter->quiescent) { 2003 spin_unlock_irqrestore(PENDING_LIST_LOCK(adapter), flags); 2004 return; 2005 } 2006 2007 while (!list_empty(&adapter->pend_list)) { 2008 2009 assert_spin_locked(PENDING_LIST_LOCK(adapter)); 2010 2011 scb = list_entry(adapter->pend_list.next, scb_t, list); 2012 2013 // remove the scb from the pending list and try to 2014 // issue. If we are unable to issue it, put back in 2015 // the pending list and return 2016 2017 list_del_init(&scb->list); 2018 2019 spin_unlock_irqrestore(PENDING_LIST_LOCK(adapter), flags); 2020 2021 // if mailbox was busy, return SCB back to pending 2022 // list. Make sure to add at the head, since that's 2023 // where it would have been removed from 2024 2025 scb->state = SCB_ISSUED; 2026 2027 if (mbox_post_cmd(adapter, scb) != 0) { 2028 2029 spin_lock_irqsave(PENDING_LIST_LOCK(adapter), flags); 2030 2031 scb->state = SCB_PENDQ; 2032 2033 list_add(&scb->list, &adapter->pend_list); 2034 2035 spin_unlock_irqrestore(PENDING_LIST_LOCK(adapter), 2036 flags); 2037 2038 return; 2039 } 2040 2041 spin_lock_irqsave(PENDING_LIST_LOCK(adapter), flags); 2042 } 2043 2044 spin_unlock_irqrestore(PENDING_LIST_LOCK(adapter), flags); 2045 2046 2047 return; 2048 } 2049 2050 2051 /** 2052 * megaraid_mbox_prepare_pthru - prepare a command for physical devices 2053 * @adapter - pointer to controller's soft state 2054 * @scb - scsi control block 2055 * @scp - scsi command from the mid-layer 2056 * 2057 * prepare a command for the scsi physical devices 2058 */ 2059 static void 2060 megaraid_mbox_prepare_pthru(adapter_t *adapter, scb_t *scb, 2061 struct scsi_cmnd *scp) 2062 { 2063 mbox_ccb_t *ccb; 2064 mraid_passthru_t *pthru; 2065 uint8_t channel; 2066 uint8_t target; 2067 2068 ccb = (mbox_ccb_t *)scb->ccb; 2069 pthru = ccb->pthru; 2070 channel = scb->dev_channel; 2071 target = scb->dev_target; 2072 2073 // 0=6sec, 1=60sec, 2=10min, 3=3hrs, 4=NO timeout 2074 pthru->timeout = 4; 2075 pthru->ars = 1; 2076 pthru->islogical = 0; 2077 pthru->channel = 0; 2078 pthru->target = (channel << 4) | target; 2079 pthru->logdrv = SCP2LUN(scp); 2080 pthru->reqsenselen = 14; 2081 pthru->cdblen = scp->cmd_len; 2082 2083 memcpy(pthru->cdb, scp->cmnd, scp->cmd_len); 2084 2085 if (scp->request_bufflen) { 2086 pthru->dataxferlen = scp->request_bufflen; 2087 pthru->dataxferaddr = ccb->sgl_dma_h; 2088 pthru->numsge = megaraid_mbox_mksgl(adapter, scb); 2089 } 2090 else { 2091 pthru->dataxferaddr = 0; 2092 pthru->dataxferlen = 0; 2093 pthru->numsge = 0; 2094 } 2095 return; 2096 } 2097 2098 2099 /** 2100 * megaraid_mbox_prepare_epthru - prepare a command for physical devices 2101 * @adapter - pointer to controller's soft state 2102 * @scb - scsi control block 2103 * @scp - scsi command from the mid-layer 2104 * 2105 * prepare a command for the scsi physical devices. This rountine prepares 2106 * commands for devices which can take extended CDBs (>10 bytes) 2107 */ 2108 static void 2109 megaraid_mbox_prepare_epthru(adapter_t *adapter, scb_t *scb, 2110 struct scsi_cmnd *scp) 2111 { 2112 mbox_ccb_t *ccb; 2113 mraid_epassthru_t *epthru; 2114 uint8_t channel; 2115 uint8_t target; 2116 2117 ccb = (mbox_ccb_t *)scb->ccb; 2118 epthru = ccb->epthru; 2119 channel = scb->dev_channel; 2120 target = scb->dev_target; 2121 2122 // 0=6sec, 1=60sec, 2=10min, 3=3hrs, 4=NO timeout 2123 epthru->timeout = 4; 2124 epthru->ars = 1; 2125 epthru->islogical = 0; 2126 epthru->channel = 0; 2127 epthru->target = (channel << 4) | target; 2128 epthru->logdrv = SCP2LUN(scp); 2129 epthru->reqsenselen = 14; 2130 epthru->cdblen = scp->cmd_len; 2131 2132 memcpy(epthru->cdb, scp->cmnd, scp->cmd_len); 2133 2134 if (scp->request_bufflen) { 2135 epthru->dataxferlen = scp->request_bufflen; 2136 epthru->dataxferaddr = ccb->sgl_dma_h; 2137 epthru->numsge = megaraid_mbox_mksgl(adapter, scb); 2138 } 2139 else { 2140 epthru->dataxferaddr = 0; 2141 epthru->dataxferlen = 0; 2142 epthru->numsge = 0; 2143 } 2144 return; 2145 } 2146 2147 2148 /** 2149 * megaraid_ack_sequence - interrupt ack sequence for memory mapped HBAs 2150 * @adapter - controller's soft state 2151 * 2152 * Interrupt ackrowledgement sequence for memory mapped HBAs. Find out the 2153 * completed command and put them on the completed list for later processing. 2154 * 2155 * Returns: 1 if the interrupt is valid, 0 otherwise 2156 */ 2157 static inline int 2158 megaraid_ack_sequence(adapter_t *adapter) 2159 { 2160 mraid_device_t *raid_dev = ADAP2RAIDDEV(adapter); 2161 mbox_t *mbox; 2162 scb_t *scb; 2163 uint8_t nstatus; 2164 uint8_t completed[MBOX_MAX_FIRMWARE_STATUS]; 2165 struct list_head clist; 2166 int handled; 2167 uint32_t dword; 2168 unsigned long flags; 2169 int i, j; 2170 2171 2172 mbox = raid_dev->mbox; 2173 2174 // move the SCBs from the firmware completed array to our local list 2175 INIT_LIST_HEAD(&clist); 2176 2177 // loop till F/W has more commands for us to complete 2178 handled = 0; 2179 spin_lock_irqsave(MAILBOX_LOCK(raid_dev), flags); 2180 do { 2181 /* 2182 * Check if a valid interrupt is pending. If found, force the 2183 * interrupt line low. 2184 */ 2185 dword = RDOUTDOOR(raid_dev); 2186 if (dword != 0x10001234) break; 2187 2188 handled = 1; 2189 2190 WROUTDOOR(raid_dev, 0x10001234); 2191 2192 nstatus = 0; 2193 // wait for valid numstatus to post 2194 for (i = 0; i < 0xFFFFF; i++) { 2195 if (mbox->numstatus != 0xFF) { 2196 nstatus = mbox->numstatus; 2197 break; 2198 } 2199 rmb(); 2200 } 2201 mbox->numstatus = 0xFF; 2202 2203 adapter->outstanding_cmds -= nstatus; 2204 2205 for (i = 0; i < nstatus; i++) { 2206 2207 // wait for valid command index to post 2208 for (j = 0; j < 0xFFFFF; j++) { 2209 if (mbox->completed[i] != 0xFF) break; 2210 rmb(); 2211 } 2212 completed[i] = mbox->completed[i]; 2213 mbox->completed[i] = 0xFF; 2214 2215 if (completed[i] == 0xFF) { 2216 con_log(CL_ANN, (KERN_CRIT 2217 "megaraid: command posting timed out\n")); 2218 2219 BUG(); 2220 continue; 2221 } 2222 2223 // Get SCB associated with this command id 2224 if (completed[i] >= MBOX_MAX_SCSI_CMDS) { 2225 // a cmm command 2226 scb = adapter->uscb_list + (completed[i] - 2227 MBOX_MAX_SCSI_CMDS); 2228 } 2229 else { 2230 // an os command 2231 scb = adapter->kscb_list + completed[i]; 2232 } 2233 2234 scb->status = mbox->status; 2235 list_add_tail(&scb->list, &clist); 2236 } 2237 2238 // Acknowledge interrupt 2239 WRINDOOR(raid_dev, 0x02); 2240 2241 } while(1); 2242 2243 spin_unlock_irqrestore(MAILBOX_LOCK(raid_dev), flags); 2244 2245 2246 // put the completed commands in the completed list. DPC would 2247 // complete these commands later 2248 spin_lock_irqsave(COMPLETED_LIST_LOCK(adapter), flags); 2249 2250 list_splice(&clist, &adapter->completed_list); 2251 2252 spin_unlock_irqrestore(COMPLETED_LIST_LOCK(adapter), flags); 2253 2254 2255 // schedule the DPC if there is some work for it 2256 if (handled) 2257 tasklet_schedule(&adapter->dpc_h); 2258 2259 return handled; 2260 } 2261 2262 2263 /** 2264 * megaraid_isr - isr for memory based mailbox based controllers 2265 * @irq - irq 2266 * @devp - pointer to our soft state 2267 * @regs - unused 2268 * 2269 * Interrupt service routine for memory-mapped mailbox controllers. 2270 */ 2271 static irqreturn_t 2272 megaraid_isr(int irq, void *devp, struct pt_regs *regs) 2273 { 2274 adapter_t *adapter = devp; 2275 int handled; 2276 2277 handled = megaraid_ack_sequence(adapter); 2278 2279 /* Loop through any pending requests */ 2280 if (!adapter->quiescent) { 2281 megaraid_mbox_runpendq(adapter, NULL); 2282 } 2283 2284 return IRQ_RETVAL(handled); 2285 } 2286 2287 2288 /** 2289 * megaraid_mbox_sync_scb - sync kernel buffers 2290 * @adapter : controller's soft state 2291 * @scb : pointer to the resource packet 2292 * 2293 * DMA sync if required. 2294 */ 2295 static inline void 2296 megaraid_mbox_sync_scb(adapter_t *adapter, scb_t *scb) 2297 { 2298 mbox_ccb_t *ccb; 2299 2300 ccb = (mbox_ccb_t *)scb->ccb; 2301 2302 switch (scb->dma_type) { 2303 2304 case MRAID_DMA_WBUF: 2305 if (scb->dma_direction == PCI_DMA_FROMDEVICE) { 2306 pci_dma_sync_single_for_cpu(adapter->pdev, 2307 ccb->buf_dma_h, 2308 scb->scp->request_bufflen, 2309 PCI_DMA_FROMDEVICE); 2310 } 2311 2312 pci_unmap_page(adapter->pdev, ccb->buf_dma_h, 2313 scb->scp->request_bufflen, scb->dma_direction); 2314 2315 break; 2316 2317 case MRAID_DMA_WSG: 2318 if (scb->dma_direction == PCI_DMA_FROMDEVICE) { 2319 pci_dma_sync_sg_for_cpu(adapter->pdev, 2320 scb->scp->request_buffer, 2321 scb->scp->use_sg, PCI_DMA_FROMDEVICE); 2322 } 2323 2324 pci_unmap_sg(adapter->pdev, scb->scp->request_buffer, 2325 scb->scp->use_sg, scb->dma_direction); 2326 2327 break; 2328 2329 default: 2330 break; 2331 } 2332 2333 return; 2334 } 2335 2336 2337 /** 2338 * megaraid_mbox_dpc - the tasklet to complete the commands from completed list 2339 * @devp : pointer to HBA soft state 2340 * 2341 * Pick up the commands from the completed list and send back to the owners. 2342 * This is a reentrant function and does not assume any locks are held while 2343 * it is being called. 2344 */ 2345 static void 2346 megaraid_mbox_dpc(unsigned long devp) 2347 { 2348 adapter_t *adapter = (adapter_t *)devp; 2349 mraid_device_t *raid_dev; 2350 struct list_head clist; 2351 struct scatterlist *sgl; 2352 scb_t *scb; 2353 scb_t *tmp; 2354 struct scsi_cmnd *scp; 2355 mraid_passthru_t *pthru; 2356 mraid_epassthru_t *epthru; 2357 mbox_ccb_t *ccb; 2358 int islogical; 2359 int pdev_index; 2360 int pdev_state; 2361 mbox_t *mbox; 2362 unsigned long flags; 2363 uint8_t c; 2364 int status; 2365 2366 2367 if (!adapter) return; 2368 2369 raid_dev = ADAP2RAIDDEV(adapter); 2370 2371 // move the SCBs from the completed list to our local list 2372 INIT_LIST_HEAD(&clist); 2373 2374 spin_lock_irqsave(COMPLETED_LIST_LOCK(adapter), flags); 2375 2376 list_splice_init(&adapter->completed_list, &clist); 2377 2378 spin_unlock_irqrestore(COMPLETED_LIST_LOCK(adapter), flags); 2379 2380 2381 list_for_each_entry_safe(scb, tmp, &clist, list) { 2382 2383 status = scb->status; 2384 scp = scb->scp; 2385 ccb = (mbox_ccb_t *)scb->ccb; 2386 pthru = ccb->pthru; 2387 epthru = ccb->epthru; 2388 mbox = ccb->mbox; 2389 2390 // Make sure f/w has completed a valid command 2391 if (scb->state != SCB_ISSUED) { 2392 con_log(CL_ANN, (KERN_CRIT 2393 "megaraid critical err: invalid command %d:%d:%p\n", 2394 scb->sno, scb->state, scp)); 2395 BUG(); 2396 continue; // Must never happen! 2397 } 2398 2399 // check for the management command and complete it right away 2400 if (scb->sno >= MBOX_MAX_SCSI_CMDS) { 2401 scb->state = SCB_FREE; 2402 scb->status = status; 2403 2404 // remove from local clist 2405 list_del_init(&scb->list); 2406 2407 megaraid_mbox_mm_done(adapter, scb); 2408 2409 continue; 2410 } 2411 2412 // Was an abort issued for this command earlier 2413 if (scb->state & SCB_ABORT) { 2414 con_log(CL_ANN, (KERN_NOTICE 2415 "megaraid: aborted cmd %lx[%x] completed\n", 2416 scp->serial_number, scb->sno)); 2417 } 2418 2419 /* 2420 * If the inquiry came of a disk drive which is not part of 2421 * any RAID array, expose it to the kernel. For this to be 2422 * enabled, user must set the "megaraid_expose_unconf_disks" 2423 * flag to 1 by specifying it on module parameter list. 2424 * This would enable data migration off drives from other 2425 * configurations. 2426 */ 2427 islogical = MRAID_IS_LOGICAL(adapter, scp); 2428 if (scp->cmnd[0] == INQUIRY && status == 0 && islogical == 0 2429 && IS_RAID_CH(raid_dev, scb->dev_channel)) { 2430 2431 if (scp->use_sg) { 2432 sgl = (struct scatterlist *) 2433 scp->request_buffer; 2434 2435 if (sgl->page) { 2436 c = *(unsigned char *) 2437 (page_address((&sgl[0])->page) + 2438 (&sgl[0])->offset); 2439 } 2440 else { 2441 con_log(CL_ANN, (KERN_WARNING 2442 "megaraid mailbox: invalid sg:%d\n", 2443 __LINE__)); 2444 c = 0; 2445 } 2446 } 2447 else { 2448 c = *(uint8_t *)scp->request_buffer; 2449 } 2450 2451 if ((c & 0x1F ) == TYPE_DISK) { 2452 pdev_index = (scb->dev_channel * 16) + 2453 scb->dev_target; 2454 pdev_state = 2455 raid_dev->pdrv_state[pdev_index] & 0x0F; 2456 2457 if (pdev_state == PDRV_ONLINE || 2458 pdev_state == PDRV_FAILED || 2459 pdev_state == PDRV_RBLD || 2460 pdev_state == PDRV_HOTSPARE || 2461 megaraid_expose_unconf_disks == 0) { 2462 2463 status = 0xF0; 2464 } 2465 } 2466 } 2467 2468 // Convert MegaRAID status to Linux error code 2469 switch (status) { 2470 2471 case 0x00: 2472 2473 scp->result = (DID_OK << 16); 2474 break; 2475 2476 case 0x02: 2477 2478 /* set sense_buffer and result fields */ 2479 if (mbox->cmd == MBOXCMD_PASSTHRU || 2480 mbox->cmd == MBOXCMD_PASSTHRU64) { 2481 2482 memcpy(scp->sense_buffer, pthru->reqsensearea, 2483 14); 2484 2485 scp->result = DRIVER_SENSE << 24 | 2486 DID_OK << 16 | CHECK_CONDITION << 1; 2487 } 2488 else { 2489 if (mbox->cmd == MBOXCMD_EXTPTHRU) { 2490 2491 memcpy(scp->sense_buffer, 2492 epthru->reqsensearea, 14); 2493 2494 scp->result = DRIVER_SENSE << 24 | 2495 DID_OK << 16 | 2496 CHECK_CONDITION << 1; 2497 } else { 2498 scp->sense_buffer[0] = 0x70; 2499 scp->sense_buffer[2] = ABORTED_COMMAND; 2500 scp->result = CHECK_CONDITION << 1; 2501 } 2502 } 2503 break; 2504 2505 case 0x08: 2506 2507 scp->result = DID_BUS_BUSY << 16 | status; 2508 break; 2509 2510 default: 2511 2512 /* 2513 * If TEST_UNIT_READY fails, we know RESERVATION_STATUS 2514 * failed 2515 */ 2516 if (scp->cmnd[0] == TEST_UNIT_READY) { 2517 scp->result = DID_ERROR << 16 | 2518 RESERVATION_CONFLICT << 1; 2519 } 2520 else 2521 /* 2522 * Error code returned is 1 if Reserve or Release 2523 * failed or the input parameter is invalid 2524 */ 2525 if (status == 1 && (scp->cmnd[0] == RESERVE || 2526 scp->cmnd[0] == RELEASE)) { 2527 2528 scp->result = DID_ERROR << 16 | 2529 RESERVATION_CONFLICT << 1; 2530 } 2531 else { 2532 scp->result = DID_BAD_TARGET << 16 | status; 2533 } 2534 } 2535 2536 // print a debug message for all failed commands 2537 if (status) { 2538 megaraid_mbox_display_scb(adapter, scb); 2539 } 2540 2541 // Free our internal resources and call the mid-layer callback 2542 // routine 2543 megaraid_mbox_sync_scb(adapter, scb); 2544 2545 // remove from local clist 2546 list_del_init(&scb->list); 2547 2548 // put back in free list 2549 megaraid_dealloc_scb(adapter, scb); 2550 2551 // send the scsi packet back to kernel 2552 spin_lock(adapter->host_lock); 2553 scp->scsi_done(scp); 2554 spin_unlock(adapter->host_lock); 2555 } 2556 2557 return; 2558 } 2559 2560 2561 /** 2562 * megaraid_abort_handler - abort the scsi command 2563 * @scp : command to be aborted 2564 * 2565 * Abort a previous SCSI request. Only commands on the pending list can be 2566 * aborted. All the commands issued to the F/W must complete. 2567 **/ 2568 static int 2569 __megaraid_abort_handler(struct scsi_cmnd *scp) 2570 { 2571 adapter_t *adapter; 2572 mraid_device_t *raid_dev; 2573 scb_t *scb; 2574 scb_t *tmp; 2575 int found; 2576 unsigned long flags; 2577 int i; 2578 2579 2580 adapter = SCP2ADAPTER(scp); 2581 raid_dev = ADAP2RAIDDEV(adapter); 2582 2583 assert_spin_locked(adapter->host_lock); 2584 2585 con_log(CL_ANN, (KERN_WARNING 2586 "megaraid: aborting-%ld cmd=%x <c=%d t=%d l=%d>\n", 2587 scp->serial_number, scp->cmnd[0], SCP2CHANNEL(scp), 2588 SCP2TARGET(scp), SCP2LUN(scp))); 2589 2590 // If FW has stopped responding, simply return failure 2591 if (raid_dev->hw_error) { 2592 con_log(CL_ANN, (KERN_NOTICE 2593 "megaraid: hw error, not aborting\n")); 2594 return FAILED; 2595 } 2596 2597 // There might a race here, where the command was completed by the 2598 // firmware and now it is on the completed list. Before we could 2599 // complete the command to the kernel in dpc, the abort came. 2600 // Find out if this is the case to avoid the race. 2601 scb = NULL; 2602 spin_lock_irqsave(COMPLETED_LIST_LOCK(adapter), flags); 2603 list_for_each_entry_safe(scb, tmp, &adapter->completed_list, list) { 2604 2605 if (scb->scp == scp) { // Found command 2606 2607 list_del_init(&scb->list); // from completed list 2608 2609 con_log(CL_ANN, (KERN_WARNING 2610 "megaraid: %ld:%d[%d:%d], abort from completed list\n", 2611 scp->serial_number, scb->sno, 2612 scb->dev_channel, scb->dev_target)); 2613 2614 scp->result = (DID_ABORT << 16); 2615 scp->scsi_done(scp); 2616 2617 megaraid_dealloc_scb(adapter, scb); 2618 2619 spin_unlock_irqrestore(COMPLETED_LIST_LOCK(adapter), 2620 flags); 2621 2622 return SUCCESS; 2623 } 2624 } 2625 spin_unlock_irqrestore(COMPLETED_LIST_LOCK(adapter), flags); 2626 2627 2628 // Find out if this command is still on the pending list. If it is and 2629 // was never issued, abort and return success. If the command is owned 2630 // by the firmware, we must wait for it to complete by the FW. 2631 spin_lock_irqsave(PENDING_LIST_LOCK(adapter), flags); 2632 list_for_each_entry_safe(scb, tmp, &adapter->pend_list, list) { 2633 2634 if (scb->scp == scp) { // Found command 2635 2636 list_del_init(&scb->list); // from pending list 2637 2638 ASSERT(!(scb->state & SCB_ISSUED)); 2639 2640 con_log(CL_ANN, (KERN_WARNING 2641 "megaraid abort: %ld[%d:%d], driver owner\n", 2642 scp->serial_number, scb->dev_channel, 2643 scb->dev_target)); 2644 2645 scp->result = (DID_ABORT << 16); 2646 scp->scsi_done(scp); 2647 2648 megaraid_dealloc_scb(adapter, scb); 2649 2650 spin_unlock_irqrestore(PENDING_LIST_LOCK(adapter), 2651 flags); 2652 2653 return SUCCESS; 2654 } 2655 } 2656 spin_unlock_irqrestore(PENDING_LIST_LOCK(adapter), flags); 2657 2658 2659 // Check do we even own this command, in which case this would be 2660 // owned by the firmware. The only way to locate the FW scb is to 2661 // traverse through the list of all SCB, since driver does not 2662 // maintain these SCBs on any list 2663 found = 0; 2664 for (i = 0; i < MBOX_MAX_SCSI_CMDS; i++) { 2665 scb = adapter->kscb_list + i; 2666 2667 if (scb->scp == scp) { 2668 2669 found = 1; 2670 2671 if (!(scb->state & SCB_ISSUED)) { 2672 con_log(CL_ANN, (KERN_WARNING 2673 "megaraid abort: %ld%d[%d:%d], invalid state\n", 2674 scp->serial_number, scb->sno, scb->dev_channel, 2675 scb->dev_target)); 2676 BUG(); 2677 } 2678 else { 2679 con_log(CL_ANN, (KERN_WARNING 2680 "megaraid abort: %ld:%d[%d:%d], fw owner\n", 2681 scp->serial_number, scb->sno, scb->dev_channel, 2682 scb->dev_target)); 2683 } 2684 } 2685 } 2686 2687 if (!found) { 2688 con_log(CL_ANN, (KERN_WARNING 2689 "megaraid abort: scsi cmd:%ld, do now own\n", 2690 scp->serial_number)); 2691 2692 // FIXME: Should there be a callback for this command? 2693 return SUCCESS; 2694 } 2695 2696 // We cannot actually abort a command owned by firmware, return 2697 // failure and wait for reset. In host reset handler, we will find out 2698 // if the HBA is still live 2699 return FAILED; 2700 } 2701 2702 static int 2703 megaraid_abort_handler(struct scsi_cmnd *scp) 2704 { 2705 adapter_t *adapter; 2706 int rc; 2707 2708 adapter = SCP2ADAPTER(scp); 2709 2710 spin_lock_irq(adapter->host_lock); 2711 rc = __megaraid_abort_handler(scp); 2712 spin_unlock_irq(adapter->host_lock); 2713 2714 return rc; 2715 } 2716 2717 2718 /** 2719 * megaraid_reset_handler - device reset hadler for mailbox based driver 2720 * @scp : reference command 2721 * 2722 * Reset handler for the mailbox based controller. First try to find out if 2723 * the FW is still live, in which case the outstanding commands counter mut go 2724 * down to 0. If that happens, also issue the reservation reset command to 2725 * relinquish (possible) reservations on the logical drives connected to this 2726 * host 2727 **/ 2728 static int 2729 __megaraid_reset_handler(struct scsi_cmnd *scp) 2730 { 2731 adapter_t *adapter; 2732 scb_t *scb; 2733 scb_t *tmp; 2734 mraid_device_t *raid_dev; 2735 unsigned long flags; 2736 uint8_t raw_mbox[sizeof(mbox_t)]; 2737 int rval; 2738 int recovery_window; 2739 int recovering; 2740 int i; 2741 2742 adapter = SCP2ADAPTER(scp); 2743 raid_dev = ADAP2RAIDDEV(adapter); 2744 2745 assert_spin_locked(adapter->host_lock); 2746 2747 con_log(CL_ANN, (KERN_WARNING "megaraid: reseting the host...\n")); 2748 2749 // return failure if adapter is not responding 2750 if (raid_dev->hw_error) { 2751 con_log(CL_ANN, (KERN_NOTICE 2752 "megaraid: hw error, cannot reset\n")); 2753 return FAILED; 2754 } 2755 2756 2757 // Under exceptional conditions, FW can take up to 3 minutes to 2758 // complete command processing. Wait for additional 2 minutes for the 2759 // pending commands counter to go down to 0. If it doesn't, let the 2760 // controller be marked offline 2761 // Also, reset all the commands currently owned by the driver 2762 spin_lock_irqsave(PENDING_LIST_LOCK(adapter), flags); 2763 list_for_each_entry_safe(scb, tmp, &adapter->pend_list, list) { 2764 2765 list_del_init(&scb->list); // from pending list 2766 2767 con_log(CL_ANN, (KERN_WARNING 2768 "megaraid: %ld:%d[%d:%d], reset from pending list\n", 2769 scp->serial_number, scb->sno, 2770 scb->dev_channel, scb->dev_target)); 2771 2772 scp->result = (DID_RESET << 16); 2773 scp->scsi_done(scp); 2774 2775 megaraid_dealloc_scb(adapter, scb); 2776 } 2777 spin_unlock_irqrestore(PENDING_LIST_LOCK(adapter), flags); 2778 2779 if (adapter->outstanding_cmds) { 2780 con_log(CL_ANN, (KERN_NOTICE 2781 "megaraid: %d outstanding commands. Max wait %d sec\n", 2782 adapter->outstanding_cmds, MBOX_RESET_WAIT)); 2783 } 2784 2785 spin_unlock(adapter->host_lock); 2786 2787 recovery_window = MBOX_RESET_WAIT + MBOX_RESET_EXT_WAIT; 2788 2789 recovering = adapter->outstanding_cmds; 2790 2791 for (i = 0; i < recovery_window && adapter->outstanding_cmds; i++) { 2792 2793 megaraid_ack_sequence(adapter); 2794 2795 // print a message once every 5 seconds only 2796 if (!(i % 5)) { 2797 con_log(CL_ANN, ( 2798 "megaraid mbox: Wait for %d commands to complete:%d\n", 2799 adapter->outstanding_cmds, 2800 MBOX_RESET_WAIT - i)); 2801 } 2802 2803 // bailout if no recovery happended in reset time 2804 if ((i == MBOX_RESET_WAIT) && 2805 (recovering == adapter->outstanding_cmds)) { 2806 break; 2807 } 2808 2809 msleep(1000); 2810 } 2811 2812 spin_lock(adapter->host_lock); 2813 2814 // If still outstanding commands, bail out 2815 if (adapter->outstanding_cmds) { 2816 con_log(CL_ANN, (KERN_WARNING 2817 "megaraid mbox: critical hardware error!\n")); 2818 2819 raid_dev->hw_error = 1; 2820 2821 return FAILED; 2822 } 2823 else { 2824 con_log(CL_ANN, (KERN_NOTICE 2825 "megaraid mbox: reset sequence completed sucessfully\n")); 2826 } 2827 2828 2829 // If the controller supports clustering, reset reservations 2830 if (!adapter->ha) return SUCCESS; 2831 2832 // clear reservations if any 2833 raw_mbox[0] = CLUSTER_CMD; 2834 raw_mbox[2] = RESET_RESERVATIONS; 2835 2836 rval = SUCCESS; 2837 if (mbox_post_sync_cmd_fast(adapter, raw_mbox) == 0) { 2838 con_log(CL_ANN, 2839 (KERN_INFO "megaraid: reservation reset\n")); 2840 } 2841 else { 2842 rval = FAILED; 2843 con_log(CL_ANN, (KERN_WARNING 2844 "megaraid: reservation reset failed\n")); 2845 } 2846 2847 return rval; 2848 } 2849 2850 static int 2851 megaraid_reset_handler(struct scsi_cmnd *cmd) 2852 { 2853 int rc; 2854 2855 spin_lock_irq(cmd->device->host->host_lock); 2856 rc = __megaraid_reset_handler(cmd); 2857 spin_unlock_irq(cmd->device->host->host_lock); 2858 2859 return rc; 2860 } 2861 2862 2863 /* 2864 * START: internal commands library 2865 * 2866 * This section of the driver has the common routine used by the driver and 2867 * also has all the FW routines 2868 */ 2869 2870 /** 2871 * mbox_post_sync_cmd() - blocking command to the mailbox based controllers 2872 * @adapter - controller's soft state 2873 * @raw_mbox - the mailbox 2874 * 2875 * Issue a scb in synchronous and non-interrupt mode for mailbox based 2876 * controllers 2877 */ 2878 static int 2879 mbox_post_sync_cmd(adapter_t *adapter, uint8_t raw_mbox[]) 2880 { 2881 mraid_device_t *raid_dev = ADAP2RAIDDEV(adapter); 2882 mbox64_t *mbox64; 2883 mbox_t *mbox; 2884 uint8_t status; 2885 int i; 2886 2887 2888 mbox64 = raid_dev->mbox64; 2889 mbox = raid_dev->mbox; 2890 2891 /* 2892 * Wait until mailbox is free 2893 */ 2894 if (megaraid_busywait_mbox(raid_dev) != 0) 2895 goto blocked_mailbox; 2896 2897 /* 2898 * Copy mailbox data into host structure 2899 */ 2900 memcpy((caddr_t)mbox, (caddr_t)raw_mbox, 16); 2901 mbox->cmdid = 0xFE; 2902 mbox->busy = 1; 2903 mbox->poll = 0; 2904 mbox->ack = 0; 2905 mbox->numstatus = 0xFF; 2906 mbox->status = 0xFF; 2907 2908 wmb(); 2909 WRINDOOR(raid_dev, raid_dev->mbox_dma | 0x1); 2910 2911 // wait for maximum 1 second for status to post. If the status is not 2912 // available within 1 second, assume FW is initializing and wait 2913 // for an extended amount of time 2914 if (mbox->numstatus == 0xFF) { // status not yet available 2915 udelay(25);; 2916 2917 for (i = 0; mbox->numstatus == 0xFF && i < 1000; i++) { 2918 rmb(); 2919 msleep(1); 2920 } 2921 2922 2923 if (i == 1000) { 2924 con_log(CL_ANN, (KERN_NOTICE 2925 "megaraid mailbox: wait for FW to boot ")); 2926 2927 for (i = 0; (mbox->numstatus == 0xFF) && 2928 (i < MBOX_RESET_WAIT); i++) { 2929 rmb(); 2930 con_log(CL_ANN, ("\b\b\b\b\b[%03d]", 2931 MBOX_RESET_WAIT - i)); 2932 msleep(1000); 2933 } 2934 2935 if (i == MBOX_RESET_WAIT) { 2936 2937 con_log(CL_ANN, ( 2938 "\nmegaraid mailbox: status not available\n")); 2939 2940 return -1; 2941 } 2942 con_log(CL_ANN, ("\b\b\b\b\b[ok] \n")); 2943 } 2944 } 2945 2946 // wait for maximum 1 second for poll semaphore 2947 if (mbox->poll != 0x77) { 2948 udelay(25); 2949 2950 for (i = 0; (mbox->poll != 0x77) && (i < 1000); i++) { 2951 rmb(); 2952 msleep(1); 2953 } 2954 2955 if (i == 1000) { 2956 con_log(CL_ANN, (KERN_WARNING 2957 "megaraid mailbox: could not get poll semaphore\n")); 2958 return -1; 2959 } 2960 } 2961 2962 WRINDOOR(raid_dev, raid_dev->mbox_dma | 0x2); 2963 wmb(); 2964 2965 // wait for maximum 1 second for acknowledgement 2966 if (RDINDOOR(raid_dev) & 0x2) { 2967 udelay(25); 2968 2969 for (i = 0; (RDINDOOR(raid_dev) & 0x2) && (i < 1000); i++) { 2970 rmb(); 2971 msleep(1); 2972 } 2973 2974 if (i == 1000) { 2975 con_log(CL_ANN, (KERN_WARNING 2976 "megaraid mailbox: could not acknowledge\n")); 2977 return -1; 2978 } 2979 } 2980 mbox->poll = 0; 2981 mbox->ack = 0x77; 2982 2983 status = mbox->status; 2984 2985 // invalidate the completed command id array. After command 2986 // completion, firmware would write the valid id. 2987 mbox->numstatus = 0xFF; 2988 mbox->status = 0xFF; 2989 for (i = 0; i < MBOX_MAX_FIRMWARE_STATUS; i++) { 2990 mbox->completed[i] = 0xFF; 2991 } 2992 2993 return status; 2994 2995 blocked_mailbox: 2996 2997 con_log(CL_ANN, (KERN_WARNING "megaraid: blocked mailbox\n") ); 2998 return -1; 2999 } 3000 3001 3002 /** 3003 * mbox_post_sync_cmd_fast - blocking command to the mailbox based controllers 3004 * @adapter - controller's soft state 3005 * @raw_mbox - the mailbox 3006 * 3007 * Issue a scb in synchronous and non-interrupt mode for mailbox based 3008 * controllers. This is a faster version of the synchronous command and 3009 * therefore can be called in interrupt-context as well 3010 */ 3011 static int 3012 mbox_post_sync_cmd_fast(adapter_t *adapter, uint8_t raw_mbox[]) 3013 { 3014 mraid_device_t *raid_dev = ADAP2RAIDDEV(adapter); 3015 mbox_t *mbox; 3016 long i; 3017 3018 3019 mbox = raid_dev->mbox; 3020 3021 // return immediately if the mailbox is busy 3022 if (mbox->busy) return -1; 3023 3024 // Copy mailbox data into host structure 3025 memcpy((caddr_t)mbox, (caddr_t)raw_mbox, 14); 3026 mbox->cmdid = 0xFE; 3027 mbox->busy = 1; 3028 mbox->poll = 0; 3029 mbox->ack = 0; 3030 mbox->numstatus = 0xFF; 3031 mbox->status = 0xFF; 3032 3033 wmb(); 3034 WRINDOOR(raid_dev, raid_dev->mbox_dma | 0x1); 3035 3036 for (i = 0; i < 0xFFFFF; i++) { 3037 if (mbox->numstatus != 0xFF) break; 3038 } 3039 3040 if (i == 0xFFFFF) { 3041 // We may need to re-calibrate the counter 3042 con_log(CL_ANN, (KERN_CRIT 3043 "megaraid: fast sync command timed out\n")); 3044 } 3045 3046 WRINDOOR(raid_dev, raid_dev->mbox_dma | 0x2); 3047 wmb(); 3048 3049 return mbox->status; 3050 } 3051 3052 3053 /** 3054 * megaraid_busywait_mbox() - Wait until the controller's mailbox is available 3055 * @raid_dev - RAID device (HBA) soft state 3056 * 3057 * wait until the controller's mailbox is available to accept more commands. 3058 * wait for at most 1 second 3059 */ 3060 static int 3061 megaraid_busywait_mbox(mraid_device_t *raid_dev) 3062 { 3063 mbox_t *mbox = raid_dev->mbox; 3064 int i = 0; 3065 3066 if (mbox->busy) { 3067 udelay(25); 3068 for (i = 0; mbox->busy && i < 1000; i++) 3069 msleep(1); 3070 } 3071 3072 if (i < 1000) return 0; 3073 else return -1; 3074 } 3075 3076 3077 /** 3078 * megaraid_mbox_product_info - some static information about the controller 3079 * @adapter - our soft state 3080 * 3081 * issue commands to the controller to grab some parameters required by our 3082 * caller. 3083 */ 3084 static int 3085 megaraid_mbox_product_info(adapter_t *adapter) 3086 { 3087 mraid_device_t *raid_dev = ADAP2RAIDDEV(adapter); 3088 mbox_t *mbox; 3089 uint8_t raw_mbox[sizeof(mbox_t)]; 3090 mraid_pinfo_t *pinfo; 3091 dma_addr_t pinfo_dma_h; 3092 mraid_inquiry3_t *mraid_inq3; 3093 int i; 3094 3095 3096 memset((caddr_t)raw_mbox, 0, sizeof(raw_mbox)); 3097 mbox = (mbox_t *)raw_mbox; 3098 3099 /* 3100 * Issue an ENQUIRY3 command to find out certain adapter parameters, 3101 * e.g., max channels, max commands etc. 3102 */ 3103 pinfo = pci_alloc_consistent(adapter->pdev, sizeof(mraid_pinfo_t), 3104 &pinfo_dma_h); 3105 3106 if (pinfo == NULL) { 3107 con_log(CL_ANN, (KERN_WARNING 3108 "megaraid: out of memory, %s %d\n", __FUNCTION__, 3109 __LINE__)); 3110 3111 return -1; 3112 } 3113 memset(pinfo, 0, sizeof(mraid_pinfo_t)); 3114 3115 mbox->xferaddr = (uint32_t)adapter->ibuf_dma_h; 3116 memset((void *)adapter->ibuf, 0, MBOX_IBUF_SIZE); 3117 3118 raw_mbox[0] = FC_NEW_CONFIG; 3119 raw_mbox[2] = NC_SUBOP_ENQUIRY3; 3120 raw_mbox[3] = ENQ3_GET_SOLICITED_FULL; 3121 3122 // Issue the command 3123 if (mbox_post_sync_cmd(adapter, raw_mbox) != 0) { 3124 3125 con_log(CL_ANN, (KERN_WARNING "megaraid: Inquiry3 failed\n")); 3126 3127 pci_free_consistent(adapter->pdev, sizeof(mraid_pinfo_t), 3128 pinfo, pinfo_dma_h); 3129 3130 return -1; 3131 } 3132 3133 /* 3134 * Collect information about state of each physical drive 3135 * attached to the controller. We will expose all the disks 3136 * which are not part of RAID 3137 */ 3138 mraid_inq3 = (mraid_inquiry3_t *)adapter->ibuf; 3139 for (i = 0; i < MBOX_MAX_PHYSICAL_DRIVES; i++) { 3140 raid_dev->pdrv_state[i] = mraid_inq3->pdrv_state[i]; 3141 } 3142 3143 /* 3144 * Get product info for information like number of channels, 3145 * maximum commands supported. 3146 */ 3147 memset((caddr_t)raw_mbox, 0, sizeof(raw_mbox)); 3148 mbox->xferaddr = (uint32_t)pinfo_dma_h; 3149 3150 raw_mbox[0] = FC_NEW_CONFIG; 3151 raw_mbox[2] = NC_SUBOP_PRODUCT_INFO; 3152 3153 if (mbox_post_sync_cmd(adapter, raw_mbox) != 0) { 3154 3155 con_log(CL_ANN, (KERN_WARNING 3156 "megaraid: product info failed\n")); 3157 3158 pci_free_consistent(adapter->pdev, sizeof(mraid_pinfo_t), 3159 pinfo, pinfo_dma_h); 3160 3161 return -1; 3162 } 3163 3164 /* 3165 * Setup some parameters for host, as required by our caller 3166 */ 3167 adapter->max_channel = pinfo->nchannels; 3168 3169 /* 3170 * we will export all the logical drives on a single channel. 3171 * Add 1 since inquires do not come for inititor ID 3172 */ 3173 adapter->max_target = MAX_LOGICAL_DRIVES_40LD + 1; 3174 adapter->max_lun = 8; // up to 8 LUNs for non-disk devices 3175 3176 /* 3177 * These are the maximum outstanding commands for the scsi-layer 3178 */ 3179 adapter->max_cmds = MBOX_MAX_SCSI_CMDS; 3180 3181 memset(adapter->fw_version, 0, VERSION_SIZE); 3182 memset(adapter->bios_version, 0, VERSION_SIZE); 3183 3184 memcpy(adapter->fw_version, pinfo->fw_version, 4); 3185 adapter->fw_version[4] = 0; 3186 3187 memcpy(adapter->bios_version, pinfo->bios_version, 4); 3188 adapter->bios_version[4] = 0; 3189 3190 con_log(CL_ANN, (KERN_NOTICE 3191 "megaraid: fw version:[%s] bios version:[%s]\n", 3192 adapter->fw_version, adapter->bios_version)); 3193 3194 pci_free_consistent(adapter->pdev, sizeof(mraid_pinfo_t), pinfo, 3195 pinfo_dma_h); 3196 3197 return 0; 3198 } 3199 3200 3201 3202 /** 3203 * megaraid_mbox_extended_cdb - check for support for extended CDBs 3204 * @adapter - soft state for the controller 3205 * 3206 * this routine check whether the controller in question supports extended 3207 * ( > 10 bytes ) CDBs 3208 */ 3209 static int 3210 megaraid_mbox_extended_cdb(adapter_t *adapter) 3211 { 3212 mbox_t *mbox; 3213 uint8_t raw_mbox[sizeof(mbox_t)]; 3214 int rval; 3215 3216 mbox = (mbox_t *)raw_mbox; 3217 3218 memset((caddr_t)raw_mbox, 0, sizeof(raw_mbox)); 3219 mbox->xferaddr = (uint32_t)adapter->ibuf_dma_h; 3220 3221 memset((void *)adapter->ibuf, 0, MBOX_IBUF_SIZE); 3222 3223 raw_mbox[0] = MAIN_MISC_OPCODE; 3224 raw_mbox[2] = SUPPORT_EXT_CDB; 3225 3226 /* 3227 * Issue the command 3228 */ 3229 rval = 0; 3230 if (mbox_post_sync_cmd(adapter, raw_mbox) != 0) { 3231 rval = -1; 3232 } 3233 3234 return rval; 3235 } 3236 3237 3238 /** 3239 * megaraid_mbox_support_ha - Do we support clustering 3240 * @adapter - soft state for the controller 3241 * @init_id - ID of the initiator 3242 * 3243 * Determine if the firmware supports clustering and the ID of the initiator. 3244 */ 3245 static int 3246 megaraid_mbox_support_ha(adapter_t *adapter, uint16_t *init_id) 3247 { 3248 mbox_t *mbox; 3249 uint8_t raw_mbox[sizeof(mbox_t)]; 3250 int rval; 3251 3252 3253 mbox = (mbox_t *)raw_mbox; 3254 3255 memset((caddr_t)raw_mbox, 0, sizeof(raw_mbox)); 3256 3257 mbox->xferaddr = (uint32_t)adapter->ibuf_dma_h; 3258 3259 memset((void *)adapter->ibuf, 0, MBOX_IBUF_SIZE); 3260 3261 raw_mbox[0] = GET_TARGET_ID; 3262 3263 // Issue the command 3264 *init_id = 7; 3265 rval = -1; 3266 if (mbox_post_sync_cmd(adapter, raw_mbox) == 0) { 3267 3268 *init_id = *(uint8_t *)adapter->ibuf; 3269 3270 con_log(CL_ANN, (KERN_INFO 3271 "megaraid: cluster firmware, initiator ID: %d\n", 3272 *init_id)); 3273 3274 rval = 0; 3275 } 3276 3277 return rval; 3278 } 3279 3280 3281 /** 3282 * megaraid_mbox_support_random_del - Do we support random deletion 3283 * @adapter - soft state for the controller 3284 * 3285 * Determine if the firmware supports random deletion 3286 * Return: 1 is operation supported, 0 otherwise 3287 */ 3288 static int 3289 megaraid_mbox_support_random_del(adapter_t *adapter) 3290 { 3291 mbox_t *mbox; 3292 uint8_t raw_mbox[sizeof(mbox_t)]; 3293 int rval; 3294 3295 3296 mbox = (mbox_t *)raw_mbox; 3297 3298 memset((caddr_t)raw_mbox, 0, sizeof(mbox_t)); 3299 3300 raw_mbox[0] = FC_DEL_LOGDRV; 3301 raw_mbox[2] = OP_SUP_DEL_LOGDRV; 3302 3303 // Issue the command 3304 rval = 0; 3305 if (mbox_post_sync_cmd(adapter, raw_mbox) == 0) { 3306 3307 con_log(CL_DLEVEL1, ("megaraid: supports random deletion\n")); 3308 3309 rval = 1; 3310 } 3311 3312 return rval; 3313 } 3314 3315 3316 /** 3317 * megaraid_mbox_get_max_sg - maximum sg elements supported by the firmware 3318 * @adapter - soft state for the controller 3319 * 3320 * Find out the maximum number of scatter-gather elements supported by the 3321 * firmware 3322 */ 3323 static int 3324 megaraid_mbox_get_max_sg(adapter_t *adapter) 3325 { 3326 mbox_t *mbox; 3327 uint8_t raw_mbox[sizeof(mbox_t)]; 3328 int nsg; 3329 3330 3331 mbox = (mbox_t *)raw_mbox; 3332 3333 memset((caddr_t)raw_mbox, 0, sizeof(mbox_t)); 3334 3335 mbox->xferaddr = (uint32_t)adapter->ibuf_dma_h; 3336 3337 memset((void *)adapter->ibuf, 0, MBOX_IBUF_SIZE); 3338 3339 raw_mbox[0] = MAIN_MISC_OPCODE; 3340 raw_mbox[2] = GET_MAX_SG_SUPPORT; 3341 3342 // Issue the command 3343 if (mbox_post_sync_cmd(adapter, raw_mbox) == 0) { 3344 nsg = *(uint8_t *)adapter->ibuf; 3345 } 3346 else { 3347 nsg = MBOX_DEFAULT_SG_SIZE; 3348 } 3349 3350 if (nsg > MBOX_MAX_SG_SIZE) nsg = MBOX_MAX_SG_SIZE; 3351 3352 return nsg; 3353 } 3354 3355 3356 /** 3357 * megaraid_mbox_enum_raid_scsi - enumerate the RAID and SCSI channels 3358 * @adapter - soft state for the controller 3359 * 3360 * Enumerate the RAID and SCSI channels for ROMB platoforms so that channels 3361 * can be exported as regular SCSI channels 3362 */ 3363 static void 3364 megaraid_mbox_enum_raid_scsi(adapter_t *adapter) 3365 { 3366 mraid_device_t *raid_dev = ADAP2RAIDDEV(adapter); 3367 mbox_t *mbox; 3368 uint8_t raw_mbox[sizeof(mbox_t)]; 3369 3370 3371 mbox = (mbox_t *)raw_mbox; 3372 3373 memset((caddr_t)raw_mbox, 0, sizeof(mbox_t)); 3374 3375 mbox->xferaddr = (uint32_t)adapter->ibuf_dma_h; 3376 3377 memset((void *)adapter->ibuf, 0, MBOX_IBUF_SIZE); 3378 3379 raw_mbox[0] = CHNL_CLASS; 3380 raw_mbox[2] = GET_CHNL_CLASS; 3381 3382 // Issue the command. If the command fails, all channels are RAID 3383 // channels 3384 raid_dev->channel_class = 0xFF; 3385 if (mbox_post_sync_cmd(adapter, raw_mbox) == 0) { 3386 raid_dev->channel_class = *(uint8_t *)adapter->ibuf; 3387 } 3388 3389 return; 3390 } 3391 3392 3393 /** 3394 * megaraid_mbox_flush_cache - flush adapter and disks cache 3395 * @param adapter : soft state for the controller 3396 * 3397 * Flush adapter cache followed by disks cache 3398 */ 3399 static void 3400 megaraid_mbox_flush_cache(adapter_t *adapter) 3401 { 3402 mbox_t *mbox; 3403 uint8_t raw_mbox[sizeof(mbox_t)]; 3404 3405 3406 mbox = (mbox_t *)raw_mbox; 3407 3408 memset((caddr_t)raw_mbox, 0, sizeof(mbox_t)); 3409 3410 raw_mbox[0] = FLUSH_ADAPTER; 3411 3412 if (mbox_post_sync_cmd(adapter, raw_mbox) != 0) { 3413 con_log(CL_ANN, ("megaraid: flush adapter failed\n")); 3414 } 3415 3416 raw_mbox[0] = FLUSH_SYSTEM; 3417 3418 if (mbox_post_sync_cmd(adapter, raw_mbox) != 0) { 3419 con_log(CL_ANN, ("megaraid: flush disks cache failed\n")); 3420 } 3421 3422 return; 3423 } 3424 3425 3426 /** 3427 * megaraid_mbox_display_scb - display SCB information, mostly debug purposes 3428 * @param adapter : controllers' soft state 3429 * @param scb : SCB to be displayed 3430 * @param level : debug level for console print 3431 * 3432 * Diplay information about the given SCB iff the current debug level is 3433 * verbose 3434 */ 3435 static void 3436 megaraid_mbox_display_scb(adapter_t *adapter, scb_t *scb) 3437 { 3438 mbox_ccb_t *ccb; 3439 struct scsi_cmnd *scp; 3440 mbox_t *mbox; 3441 int level; 3442 int i; 3443 3444 3445 ccb = (mbox_ccb_t *)scb->ccb; 3446 scp = scb->scp; 3447 mbox = ccb->mbox; 3448 3449 level = CL_DLEVEL3; 3450 3451 con_log(level, (KERN_NOTICE 3452 "megaraid mailbox: status:%#x cmd:%#x id:%#x ", scb->status, 3453 mbox->cmd, scb->sno)); 3454 3455 con_log(level, ("sec:%#x lba:%#x addr:%#x ld:%d sg:%d\n", 3456 mbox->numsectors, mbox->lba, mbox->xferaddr, mbox->logdrv, 3457 mbox->numsge)); 3458 3459 if (!scp) return; 3460 3461 con_log(level, (KERN_NOTICE "scsi cmnd: ")); 3462 3463 for (i = 0; i < scp->cmd_len; i++) { 3464 con_log(level, ("%#2.02x ", scp->cmnd[i])); 3465 } 3466 3467 con_log(level, ("\n")); 3468 3469 return; 3470 } 3471 3472 3473 /** 3474 * megaraid_mbox_setup_device_map - manage device ids 3475 * @adapter : Driver's soft state 3476 * 3477 * Manange the device ids to have an appropraite mapping between the kernel 3478 * scsi addresses and megaraid scsi and logical drive addresses. We export 3479 * scsi devices on their actual addresses, whereas the logical drives are 3480 * exported on a virtual scsi channel. 3481 **/ 3482 static void 3483 megaraid_mbox_setup_device_map(adapter_t *adapter) 3484 { 3485 uint8_t c; 3486 uint8_t t; 3487 3488 /* 3489 * First fill the values on the logical drive channel 3490 */ 3491 for (t = 0; t < LSI_MAX_LOGICAL_DRIVES_64LD; t++) 3492 adapter->device_ids[adapter->max_channel][t] = 3493 (t < adapter->init_id) ? t : t - 1; 3494 3495 adapter->device_ids[adapter->max_channel][adapter->init_id] = 0xFF; 3496 3497 /* 3498 * Fill the values on the physical devices channels 3499 */ 3500 for (c = 0; c < adapter->max_channel; c++) 3501 for (t = 0; t < LSI_MAX_LOGICAL_DRIVES_64LD; t++) 3502 adapter->device_ids[c][t] = (c << 8) | t; 3503 } 3504 3505 3506 /* 3507 * END: internal commands library 3508 */ 3509 3510 /* 3511 * START: Interface for the common management module 3512 * 3513 * This is the module, which interfaces with the common mangement module to 3514 * provide support for ioctl and sysfs 3515 */ 3516 3517 /** 3518 * megaraid_cmm_register - register with the mangement module 3519 * @param adapter : HBA soft state 3520 * 3521 * Register with the management module, which allows applications to issue 3522 * ioctl calls to the drivers. This interface is used by the management module 3523 * to setup sysfs support as well. 3524 */ 3525 static int 3526 megaraid_cmm_register(adapter_t *adapter) 3527 { 3528 mraid_device_t *raid_dev = ADAP2RAIDDEV(adapter); 3529 mraid_mmadp_t adp; 3530 scb_t *scb; 3531 mbox_ccb_t *ccb; 3532 int rval; 3533 int i; 3534 3535 // Allocate memory for the base list of scb for management module. 3536 adapter->uscb_list = kmalloc(sizeof(scb_t) * MBOX_MAX_USER_CMDS, 3537 GFP_KERNEL); 3538 3539 if (adapter->uscb_list == NULL) { 3540 con_log(CL_ANN, (KERN_WARNING 3541 "megaraid: out of memory, %s %d\n", __FUNCTION__, 3542 __LINE__)); 3543 return -1; 3544 } 3545 memset(adapter->uscb_list, 0, sizeof(scb_t) * MBOX_MAX_USER_CMDS); 3546 3547 3548 // Initialize the synchronization parameters for resources for 3549 // commands for management module 3550 INIT_LIST_HEAD(&adapter->uscb_pool); 3551 3552 spin_lock_init(USER_FREE_LIST_LOCK(adapter)); 3553 3554 3555 3556 // link all the packets. Note, CCB for commands, coming from the 3557 // commom management module, mailbox physical address are already 3558 // setup by it. We just need placeholder for that in our local command 3559 // control blocks 3560 for (i = 0; i < MBOX_MAX_USER_CMDS; i++) { 3561 3562 scb = adapter->uscb_list + i; 3563 ccb = raid_dev->uccb_list + i; 3564 3565 scb->ccb = (caddr_t)ccb; 3566 ccb->mbox64 = raid_dev->umbox64 + i; 3567 ccb->mbox = &ccb->mbox64->mbox32; 3568 ccb->raw_mbox = (uint8_t *)ccb->mbox; 3569 3570 scb->gp = 0; 3571 3572 // COMMAND ID 0 - (MBOX_MAX_SCSI_CMDS-1) ARE RESERVED FOR 3573 // COMMANDS COMING FROM IO SUBSYSTEM (MID-LAYER) 3574 scb->sno = i + MBOX_MAX_SCSI_CMDS; 3575 3576 scb->scp = NULL; 3577 scb->state = SCB_FREE; 3578 scb->dma_direction = PCI_DMA_NONE; 3579 scb->dma_type = MRAID_DMA_NONE; 3580 scb->dev_channel = -1; 3581 scb->dev_target = -1; 3582 3583 // put scb in the free pool 3584 list_add_tail(&scb->list, &adapter->uscb_pool); 3585 } 3586 3587 adp.unique_id = adapter->unique_id; 3588 adp.drvr_type = DRVRTYPE_MBOX; 3589 adp.drvr_data = (unsigned long)adapter; 3590 adp.pdev = adapter->pdev; 3591 adp.issue_uioc = megaraid_mbox_mm_handler; 3592 adp.timeout = 300; 3593 adp.max_kioc = MBOX_MAX_USER_CMDS; 3594 3595 if ((rval = mraid_mm_register_adp(&adp)) != 0) { 3596 3597 con_log(CL_ANN, (KERN_WARNING 3598 "megaraid mbox: did not register with CMM\n")); 3599 3600 kfree(adapter->uscb_list); 3601 } 3602 3603 return rval; 3604 } 3605 3606 3607 /** 3608 * megaraid_cmm_unregister - un-register with the mangement module 3609 * @param adapter : HBA soft state 3610 * 3611 * Un-register with the management module. 3612 * FIXME: mgmt module must return failure for unregister if it has pending 3613 * commands in LLD 3614 */ 3615 static int 3616 megaraid_cmm_unregister(adapter_t *adapter) 3617 { 3618 kfree(adapter->uscb_list); 3619 mraid_mm_unregister_adp(adapter->unique_id); 3620 return 0; 3621 } 3622 3623 3624 /** 3625 * megaraid_mbox_mm_handler - interface for CMM to issue commands to LLD 3626 * @param drvr_data : LLD specific data 3627 * @param kioc : CMM interface packet 3628 * @param action : command action 3629 * 3630 * This routine is invoked whenever the Common Mangement Module (CMM) has a 3631 * command for us. The 'action' parameter specifies if this is a new command 3632 * or otherwise. 3633 */ 3634 static int 3635 megaraid_mbox_mm_handler(unsigned long drvr_data, uioc_t *kioc, uint32_t action) 3636 { 3637 adapter_t *adapter; 3638 3639 if (action != IOCTL_ISSUE) { 3640 con_log(CL_ANN, (KERN_WARNING 3641 "megaraid: unsupported management action:%#2x\n", 3642 action)); 3643 return (-ENOTSUPP); 3644 } 3645 3646 adapter = (adapter_t *)drvr_data; 3647 3648 // make sure this adapter is not being detached right now. 3649 if (atomic_read(&adapter->being_detached)) { 3650 con_log(CL_ANN, (KERN_WARNING 3651 "megaraid: reject management request, detaching\n")); 3652 return (-ENODEV); 3653 } 3654 3655 switch (kioc->opcode) { 3656 3657 case GET_ADAP_INFO: 3658 3659 kioc->status = gather_hbainfo(adapter, (mraid_hba_info_t *) 3660 (unsigned long)kioc->buf_vaddr); 3661 3662 kioc->done(kioc); 3663 3664 return kioc->status; 3665 3666 case MBOX_CMD: 3667 3668 return megaraid_mbox_mm_command(adapter, kioc); 3669 3670 default: 3671 kioc->status = (-EINVAL); 3672 kioc->done(kioc); 3673 return (-EINVAL); 3674 } 3675 3676 return 0; // not reached 3677 } 3678 3679 /** 3680 * megaraid_mbox_mm_command - issues commands routed through CMM 3681 * @param adapter : HBA soft state 3682 * @param kioc : management command packet 3683 * 3684 * Issues commands, which are routed through the management module. 3685 */ 3686 static int 3687 megaraid_mbox_mm_command(adapter_t *adapter, uioc_t *kioc) 3688 { 3689 struct list_head *head = &adapter->uscb_pool; 3690 mbox64_t *mbox64; 3691 uint8_t *raw_mbox; 3692 scb_t *scb; 3693 mbox_ccb_t *ccb; 3694 unsigned long flags; 3695 3696 // detach one scb from free pool 3697 spin_lock_irqsave(USER_FREE_LIST_LOCK(adapter), flags); 3698 3699 if (list_empty(head)) { // should never happen because of CMM 3700 3701 con_log(CL_ANN, (KERN_WARNING 3702 "megaraid mbox: bug in cmm handler, lost resources\n")); 3703 3704 spin_unlock_irqrestore(USER_FREE_LIST_LOCK(adapter), flags); 3705 3706 return (-EINVAL); 3707 } 3708 3709 scb = list_entry(head->next, scb_t, list); 3710 list_del_init(&scb->list); 3711 3712 spin_unlock_irqrestore(USER_FREE_LIST_LOCK(adapter), flags); 3713 3714 scb->state = SCB_ACTIVE; 3715 scb->dma_type = MRAID_DMA_NONE; 3716 scb->dma_direction = PCI_DMA_NONE; 3717 3718 ccb = (mbox_ccb_t *)scb->ccb; 3719 mbox64 = (mbox64_t *)(unsigned long)kioc->cmdbuf; 3720 raw_mbox = (uint8_t *)&mbox64->mbox32; 3721 3722 memcpy(ccb->mbox64, mbox64, sizeof(mbox64_t)); 3723 3724 scb->gp = (unsigned long)kioc; 3725 3726 /* 3727 * If it is a logdrv random delete operation, we have to wait till 3728 * there are no outstanding cmds at the fw and then issue it directly 3729 */ 3730 if (raw_mbox[0] == FC_DEL_LOGDRV && raw_mbox[2] == OP_DEL_LOGDRV) { 3731 3732 if (wait_till_fw_empty(adapter)) { 3733 con_log(CL_ANN, (KERN_NOTICE 3734 "megaraid mbox: LD delete, timed out\n")); 3735 3736 kioc->status = -ETIME; 3737 3738 scb->status = -1; 3739 3740 megaraid_mbox_mm_done(adapter, scb); 3741 3742 return (-ETIME); 3743 } 3744 3745 INIT_LIST_HEAD(&scb->list); 3746 3747 scb->state = SCB_ISSUED; 3748 if (mbox_post_cmd(adapter, scb) != 0) { 3749 3750 con_log(CL_ANN, (KERN_NOTICE 3751 "megaraid mbox: LD delete, mailbox busy\n")); 3752 3753 kioc->status = -EBUSY; 3754 3755 scb->status = -1; 3756 3757 megaraid_mbox_mm_done(adapter, scb); 3758 3759 return (-EBUSY); 3760 } 3761 3762 return 0; 3763 } 3764 3765 // put the command on the pending list and execute 3766 megaraid_mbox_runpendq(adapter, scb); 3767 3768 return 0; 3769 } 3770 3771 3772 static int 3773 wait_till_fw_empty(adapter_t *adapter) 3774 { 3775 unsigned long flags = 0; 3776 int i; 3777 3778 3779 /* 3780 * Set the quiescent flag to stop issuing cmds to FW. 3781 */ 3782 spin_lock_irqsave(adapter->host_lock, flags); 3783 adapter->quiescent++; 3784 spin_unlock_irqrestore(adapter->host_lock, flags); 3785 3786 /* 3787 * Wait till there are no more cmds outstanding at FW. Try for at most 3788 * 60 seconds 3789 */ 3790 for (i = 0; i < 60 && adapter->outstanding_cmds; i++) { 3791 con_log(CL_DLEVEL1, (KERN_INFO 3792 "megaraid: FW has %d pending commands\n", 3793 adapter->outstanding_cmds)); 3794 3795 msleep(1000); 3796 } 3797 3798 return adapter->outstanding_cmds; 3799 } 3800 3801 3802 /** 3803 * megaraid_mbox_mm_done - callback for CMM commands 3804 * @adapter : HBA soft state 3805 * @scb : completed command 3806 * 3807 * Callback routine for internal commands originated from the management 3808 * module. 3809 */ 3810 static void 3811 megaraid_mbox_mm_done(adapter_t *adapter, scb_t *scb) 3812 { 3813 uioc_t *kioc; 3814 mbox64_t *mbox64; 3815 uint8_t *raw_mbox; 3816 unsigned long flags; 3817 3818 kioc = (uioc_t *)scb->gp; 3819 kioc->status = 0; 3820 mbox64 = (mbox64_t *)(unsigned long)kioc->cmdbuf; 3821 mbox64->mbox32.status = scb->status; 3822 raw_mbox = (uint8_t *)&mbox64->mbox32; 3823 3824 3825 // put scb in the free pool 3826 scb->state = SCB_FREE; 3827 scb->scp = NULL; 3828 3829 spin_lock_irqsave(USER_FREE_LIST_LOCK(adapter), flags); 3830 3831 list_add(&scb->list, &adapter->uscb_pool); 3832 3833 spin_unlock_irqrestore(USER_FREE_LIST_LOCK(adapter), flags); 3834 3835 // if a delete logical drive operation succeeded, restart the 3836 // controller 3837 if (raw_mbox[0] == FC_DEL_LOGDRV && raw_mbox[2] == OP_DEL_LOGDRV) { 3838 3839 adapter->quiescent--; 3840 3841 megaraid_mbox_runpendq(adapter, NULL); 3842 } 3843 3844 kioc->done(kioc); 3845 3846 return; 3847 } 3848 3849 3850 /** 3851 * gather_hbainfo - HBA characteristics for the applications 3852 * @param adapter : HBA soft state 3853 * @param hinfo : pointer to the caller's host info strucuture 3854 */ 3855 static int 3856 gather_hbainfo(adapter_t *adapter, mraid_hba_info_t *hinfo) 3857 { 3858 uint8_t dmajor; 3859 3860 dmajor = megaraid_mbox_version[0]; 3861 3862 hinfo->pci_vendor_id = adapter->pdev->vendor; 3863 hinfo->pci_device_id = adapter->pdev->device; 3864 hinfo->subsys_vendor_id = adapter->pdev->subsystem_vendor; 3865 hinfo->subsys_device_id = adapter->pdev->subsystem_device; 3866 3867 hinfo->pci_bus = adapter->pdev->bus->number; 3868 hinfo->pci_dev_fn = adapter->pdev->devfn; 3869 hinfo->pci_slot = PCI_SLOT(adapter->pdev->devfn); 3870 hinfo->irq = adapter->host->irq; 3871 hinfo->baseport = ADAP2RAIDDEV(adapter)->baseport; 3872 3873 hinfo->unique_id = (hinfo->pci_bus << 8) | adapter->pdev->devfn; 3874 hinfo->host_no = adapter->host->host_no; 3875 3876 return 0; 3877 } 3878 3879 /* 3880 * END: Interface for the common management module 3881 */ 3882 3883 3884 3885 /** 3886 * megaraid_sysfs_alloc_resources - allocate sysfs related resources 3887 * 3888 * Allocate packets required to issue FW calls whenever the sysfs attributes 3889 * are read. These attributes would require up-to-date information from the 3890 * FW. Also set up resources for mutual exclusion to share these resources and 3891 * the wait queue. 3892 * 3893 * @param adapter : controller's soft state 3894 * 3895 * @return 0 on success 3896 * @return -ERROR_CODE on failure 3897 */ 3898 static int 3899 megaraid_sysfs_alloc_resources(adapter_t *adapter) 3900 { 3901 mraid_device_t *raid_dev = ADAP2RAIDDEV(adapter); 3902 int rval = 0; 3903 3904 raid_dev->sysfs_uioc = kmalloc(sizeof(uioc_t), GFP_KERNEL); 3905 3906 raid_dev->sysfs_mbox64 = kmalloc(sizeof(mbox64_t), GFP_KERNEL); 3907 3908 raid_dev->sysfs_buffer = pci_alloc_consistent(adapter->pdev, 3909 PAGE_SIZE, &raid_dev->sysfs_buffer_dma); 3910 3911 if (!raid_dev->sysfs_uioc || !raid_dev->sysfs_mbox64 || 3912 !raid_dev->sysfs_buffer) { 3913 3914 con_log(CL_ANN, (KERN_WARNING 3915 "megaraid: out of memory, %s %d\n", __FUNCTION__, 3916 __LINE__)); 3917 3918 rval = -ENOMEM; 3919 3920 megaraid_sysfs_free_resources(adapter); 3921 } 3922 3923 sema_init(&raid_dev->sysfs_sem, 1); 3924 3925 init_waitqueue_head(&raid_dev->sysfs_wait_q); 3926 3927 return rval; 3928 } 3929 3930 3931 /** 3932 * megaraid_sysfs_free_resources - free sysfs related resources 3933 * 3934 * Free packets allocated for sysfs FW commands 3935 * 3936 * @param adapter : controller's soft state 3937 */ 3938 static void 3939 megaraid_sysfs_free_resources(adapter_t *adapter) 3940 { 3941 mraid_device_t *raid_dev = ADAP2RAIDDEV(adapter); 3942 3943 if (raid_dev->sysfs_uioc) kfree(raid_dev->sysfs_uioc); 3944 3945 if (raid_dev->sysfs_mbox64) kfree(raid_dev->sysfs_mbox64); 3946 3947 if (raid_dev->sysfs_buffer) { 3948 pci_free_consistent(adapter->pdev, PAGE_SIZE, 3949 raid_dev->sysfs_buffer, raid_dev->sysfs_buffer_dma); 3950 } 3951 } 3952 3953 3954 /** 3955 * megaraid_sysfs_get_ldmap_done - callback for get ldmap 3956 * 3957 * Callback routine called in the ISR/tasklet context for get ldmap call 3958 * 3959 * @param uioc : completed packet 3960 */ 3961 static void 3962 megaraid_sysfs_get_ldmap_done(uioc_t *uioc) 3963 { 3964 adapter_t *adapter = (adapter_t *)uioc->buf_vaddr; 3965 mraid_device_t *raid_dev = ADAP2RAIDDEV(adapter); 3966 3967 uioc->status = 0; 3968 3969 wake_up(&raid_dev->sysfs_wait_q); 3970 } 3971 3972 3973 /** 3974 * megaraid_sysfs_get_ldmap_timeout - timeout handling for get ldmap 3975 * 3976 * Timeout routine to recover and return to application, in case the adapter 3977 * has stopped responding. A timeout of 60 seconds for this command seem like 3978 * a good value 3979 * 3980 * @param uioc : timed out packet 3981 */ 3982 static void 3983 megaraid_sysfs_get_ldmap_timeout(unsigned long data) 3984 { 3985 uioc_t *uioc = (uioc_t *)data; 3986 adapter_t *adapter = (adapter_t *)uioc->buf_vaddr; 3987 mraid_device_t *raid_dev = ADAP2RAIDDEV(adapter); 3988 3989 uioc->status = -ETIME; 3990 3991 wake_up(&raid_dev->sysfs_wait_q); 3992 } 3993 3994 3995 /** 3996 * megaraid_sysfs_get_ldmap - get update logical drive map 3997 * 3998 * This routine will be called whenever user reads the logical drive 3999 * attributes, go get the current logical drive mapping table from the 4000 * firmware. We use the managment API's to issue commands to the controller. 4001 * 4002 * NOTE: The commands issuance functionality is not generalized and 4003 * implemented in context of "get ld map" command only. If required, the 4004 * command issuance logical can be trivially pulled out and implemented as a 4005 * standalone libary. For now, this should suffice since there is no other 4006 * user of this interface. 4007 * 4008 * @param adapter : controller's soft state 4009 * 4010 * @return 0 on success 4011 * @return -1 on failure 4012 */ 4013 static int 4014 megaraid_sysfs_get_ldmap(adapter_t *adapter) 4015 { 4016 mraid_device_t *raid_dev = ADAP2RAIDDEV(adapter); 4017 uioc_t *uioc; 4018 mbox64_t *mbox64; 4019 mbox_t *mbox; 4020 char *raw_mbox; 4021 struct timer_list sysfs_timer; 4022 struct timer_list *timerp; 4023 caddr_t ldmap; 4024 int rval = 0; 4025 4026 /* 4027 * Allow only one read at a time to go through the sysfs attributes 4028 */ 4029 down(&raid_dev->sysfs_sem); 4030 4031 uioc = raid_dev->sysfs_uioc; 4032 mbox64 = raid_dev->sysfs_mbox64; 4033 ldmap = raid_dev->sysfs_buffer; 4034 4035 memset(uioc, 0, sizeof(uioc_t)); 4036 memset(mbox64, 0, sizeof(mbox64_t)); 4037 memset(ldmap, 0, sizeof(raid_dev->curr_ldmap)); 4038 4039 mbox = &mbox64->mbox32; 4040 raw_mbox = (char *)mbox; 4041 uioc->cmdbuf = (uint64_t)(unsigned long)mbox64; 4042 uioc->buf_vaddr = (caddr_t)adapter; 4043 uioc->status = -ENODATA; 4044 uioc->done = megaraid_sysfs_get_ldmap_done; 4045 4046 /* 4047 * Prepare the mailbox packet to get the current logical drive mapping 4048 * table 4049 */ 4050 mbox->xferaddr = (uint32_t)raid_dev->sysfs_buffer_dma; 4051 4052 raw_mbox[0] = FC_DEL_LOGDRV; 4053 raw_mbox[2] = OP_GET_LDID_MAP; 4054 4055 /* 4056 * Setup a timer to recover from a non-responding controller 4057 */ 4058 timerp = &sysfs_timer; 4059 init_timer(timerp); 4060 4061 timerp->function = megaraid_sysfs_get_ldmap_timeout; 4062 timerp->data = (unsigned long)uioc; 4063 timerp->expires = jiffies + 60 * HZ; 4064 4065 add_timer(timerp); 4066 4067 /* 4068 * Send the command to the firmware 4069 */ 4070 rval = megaraid_mbox_mm_command(adapter, uioc); 4071 4072 if (rval == 0) { // command successfully issued 4073 wait_event(raid_dev->sysfs_wait_q, (uioc->status != -ENODATA)); 4074 4075 /* 4076 * Check if the command timed out 4077 */ 4078 if (uioc->status == -ETIME) { 4079 con_log(CL_ANN, (KERN_NOTICE 4080 "megaraid: sysfs get ld map timed out\n")); 4081 4082 rval = -ETIME; 4083 } 4084 else { 4085 rval = mbox->status; 4086 } 4087 4088 if (rval == 0) { 4089 memcpy(raid_dev->curr_ldmap, ldmap, 4090 sizeof(raid_dev->curr_ldmap)); 4091 } 4092 else { 4093 con_log(CL_ANN, (KERN_NOTICE 4094 "megaraid: get ld map failed with %x\n", rval)); 4095 } 4096 } 4097 else { 4098 con_log(CL_ANN, (KERN_NOTICE 4099 "megaraid: could not issue ldmap command:%x\n", rval)); 4100 } 4101 4102 4103 del_timer_sync(timerp); 4104 4105 up(&raid_dev->sysfs_sem); 4106 4107 return rval; 4108 } 4109 4110 4111 /** 4112 * megaraid_sysfs_show_app_hndl - display application handle for this adapter 4113 * 4114 * Display the handle used by the applications while executing management 4115 * tasks on the adapter. We invoke a management module API to get the adapter 4116 * handle, since we do not interface with applications directly. 4117 * 4118 * @param cdev : class device object representation for the host 4119 * @param buf : buffer to send data to 4120 */ 4121 static ssize_t 4122 megaraid_sysfs_show_app_hndl(struct class_device *cdev, char *buf) 4123 { 4124 struct Scsi_Host *shost = class_to_shost(cdev); 4125 adapter_t *adapter = (adapter_t *)SCSIHOST2ADAP(shost); 4126 uint32_t app_hndl; 4127 4128 app_hndl = mraid_mm_adapter_app_handle(adapter->unique_id); 4129 4130 return snprintf(buf, 8, "%u\n", app_hndl); 4131 } 4132 4133 4134 /** 4135 * megaraid_sysfs_show_ldnum - display the logical drive number for this device 4136 * 4137 * Display the logical drive number for the device in question, if it a valid 4138 * logical drive. For physical devices, "-1" is returned 4139 * The logical drive number is displayed in following format 4140 * 4141 * <SCSI ID> <LD NUM> <LD STICKY ID> <APP ADAPTER HANDLE> 4142 * <int> <int> <int> <int> 4143 * 4144 * @param dev : device object representation for the scsi device 4145 * @param buf : buffer to send data to 4146 */ 4147 static ssize_t 4148 megaraid_sysfs_show_ldnum(struct device *dev, struct device_attribute *attr, char *buf) 4149 { 4150 struct scsi_device *sdev = to_scsi_device(dev); 4151 adapter_t *adapter = (adapter_t *)SCSIHOST2ADAP(sdev->host); 4152 mraid_device_t *raid_dev = ADAP2RAIDDEV(adapter); 4153 int scsi_id = -1; 4154 int logical_drv = -1; 4155 int ldid_map = -1; 4156 uint32_t app_hndl = 0; 4157 int mapped_sdev_id; 4158 int rval; 4159 int i; 4160 4161 if (raid_dev->random_del_supported && 4162 MRAID_IS_LOGICAL_SDEV(adapter, sdev)) { 4163 4164 rval = megaraid_sysfs_get_ldmap(adapter); 4165 if (rval == 0) { 4166 4167 for (i = 0; i < MAX_LOGICAL_DRIVES_40LD; i++) { 4168 4169 mapped_sdev_id = sdev->id; 4170 4171 if (sdev->id > adapter->init_id) { 4172 mapped_sdev_id -= 1; 4173 } 4174 4175 if (raid_dev->curr_ldmap[i] == mapped_sdev_id) { 4176 4177 scsi_id = sdev->id; 4178 4179 logical_drv = i; 4180 4181 ldid_map = raid_dev->curr_ldmap[i]; 4182 4183 app_hndl = mraid_mm_adapter_app_handle( 4184 adapter->unique_id); 4185 4186 break; 4187 } 4188 } 4189 } 4190 else { 4191 con_log(CL_ANN, (KERN_NOTICE 4192 "megaraid: sysfs get ld map failed: %x\n", 4193 rval)); 4194 } 4195 } 4196 4197 return snprintf(buf, 36, "%d %d %d %d\n", scsi_id, logical_drv, 4198 ldid_map, app_hndl); 4199 } 4200 4201 4202 /* 4203 * END: Mailbox Low Level Driver 4204 */ 4205 module_init(megaraid_init); 4206 module_exit(megaraid_exit); 4207 4208 /* vim: set ts=8 sw=8 tw=78 ai si: */ 4209