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