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