init.c revision 31e824ed0d8c84c5232405167b2338ffc071ae8a
1/* 2 * This file is provided under a dual BSD/GPLv2 license. When using or 3 * redistributing this file, you may do so under either license. 4 * 5 * GPL LICENSE SUMMARY 6 * 7 * Copyright(c) 2008 - 2011 Intel Corporation. All rights reserved. 8 * 9 * This program is free software; you can redistribute it and/or modify 10 * it under the terms of version 2 of the GNU General Public License as 11 * published by the Free Software Foundation. 12 * 13 * This program is distributed in the hope that it will be useful, but 14 * WITHOUT ANY WARRANTY; without even the implied warranty of 15 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU 16 * General Public License for more details. 17 * 18 * You should have received a copy of the GNU General Public License 19 * along with this program; if not, write to the Free Software 20 * Foundation, Inc., 51 Franklin St - Fifth Floor, Boston, MA 02110-1301 USA. 21 * The full GNU General Public License is included in this distribution 22 * in the file called LICENSE.GPL. 23 * 24 * BSD LICENSE 25 * 26 * Copyright(c) 2008 - 2011 Intel Corporation. All rights reserved. 27 * All rights reserved. 28 * 29 * Redistribution and use in source and binary forms, with or without 30 * modification, are permitted provided that the following conditions 31 * are met: 32 * 33 * * Redistributions of source code must retain the above copyright 34 * notice, this list of conditions and the following disclaimer. 35 * * Redistributions in binary form must reproduce the above copyright 36 * notice, this list of conditions and the following disclaimer in 37 * the documentation and/or other materials provided with the 38 * distribution. 39 * * Neither the name of Intel Corporation nor the names of its 40 * contributors may be used to endorse or promote products derived 41 * from this software without specific prior written permission. 42 * 43 * THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS 44 * "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT 45 * LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR 46 * A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT 47 * OWNER OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, 48 * SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT 49 * LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, 50 * DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY 51 * THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT 52 * (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE 53 * OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE. 54 */ 55 56#include <linux/kernel.h> 57#include <linux/init.h> 58#include <linux/module.h> 59#include <linux/firmware.h> 60#include <linux/efi.h> 61#include <asm/string.h> 62#include "isci.h" 63#include "task.h" 64#include "sci_controller_constants.h" 65#include "scic_remote_device.h" 66#include "sci_environment.h" 67#include "probe_roms.h" 68 69static struct scsi_transport_template *isci_transport_template; 70 71static DEFINE_PCI_DEVICE_TABLE(isci_id_table) = { 72 { PCI_VDEVICE(INTEL, 0x1D61),}, 73 { PCI_VDEVICE(INTEL, 0x1D63),}, 74 { PCI_VDEVICE(INTEL, 0x1D65),}, 75 { PCI_VDEVICE(INTEL, 0x1D67),}, 76 { PCI_VDEVICE(INTEL, 0x1D69),}, 77 { PCI_VDEVICE(INTEL, 0x1D6B),}, 78 { PCI_VDEVICE(INTEL, 0x1D60),}, 79 { PCI_VDEVICE(INTEL, 0x1D62),}, 80 { PCI_VDEVICE(INTEL, 0x1D64),}, 81 { PCI_VDEVICE(INTEL, 0x1D66),}, 82 { PCI_VDEVICE(INTEL, 0x1D68),}, 83 { PCI_VDEVICE(INTEL, 0x1D6A),}, 84 {} 85}; 86 87MODULE_DEVICE_TABLE(pci, isci_id_table); 88 89/* linux isci specific settings */ 90 91#if defined(CONFIG_PBG_HBA_A0) 92int isci_si_rev = ISCI_SI_REVA0; 93#elif defined(CONFIG_PBG_HBA_A2) 94int isci_si_rev = ISCI_SI_REVA2; 95#else 96int isci_si_rev = ISCI_SI_REVB0; 97#endif 98module_param(isci_si_rev, int, 0); 99MODULE_PARM_DESC(isci_si_rev, "override default si rev (0: A0 1: A2 2: B0)"); 100 101unsigned char no_outbound_task_to = 20; 102module_param(no_outbound_task_to, byte, 0); 103MODULE_PARM_DESC(no_outbound_task_to, "No Outbound Task Timeout (1us incr)"); 104 105u16 ssp_max_occ_to = 20; 106module_param(ssp_max_occ_to, ushort, 0); 107MODULE_PARM_DESC(ssp_max_occ_to, "SSP Max occupancy timeout (100us incr)"); 108 109u16 stp_max_occ_to = 5; 110module_param(stp_max_occ_to, ushort, 0); 111MODULE_PARM_DESC(stp_max_occ_to, "STP Max occupancy timeout (100us incr)"); 112 113u16 ssp_inactive_to = 5; 114module_param(ssp_inactive_to, ushort, 0); 115MODULE_PARM_DESC(ssp_inactive_to, "SSP inactivity timeout (100us incr)"); 116 117u16 stp_inactive_to = 5; 118module_param(stp_inactive_to, ushort, 0); 119MODULE_PARM_DESC(stp_inactive_to, "STP inactivity timeout (100us incr)"); 120 121unsigned char phy_gen = 3; 122module_param(phy_gen, byte, 0); 123MODULE_PARM_DESC(phy_gen, "PHY generation (1: 1.5Gbps 2: 3.0Gbps 3: 6.0Gbps)"); 124 125unsigned char max_concurr_spinup = 1; 126module_param(max_concurr_spinup, byte, 0); 127MODULE_PARM_DESC(max_concurr_spinup, "Max concurrent device spinup"); 128 129static struct scsi_host_template isci_sht = { 130 131 .module = THIS_MODULE, 132 .name = DRV_NAME, 133 .proc_name = DRV_NAME, 134 .queuecommand = sas_queuecommand, 135 .target_alloc = sas_target_alloc, 136 .slave_configure = sas_slave_configure, 137 .slave_destroy = sas_slave_destroy, 138 .scan_finished = isci_host_scan_finished, 139 .scan_start = isci_host_scan_start, 140 .change_queue_depth = sas_change_queue_depth, 141 .change_queue_type = sas_change_queue_type, 142 .bios_param = sas_bios_param, 143 .can_queue = ISCI_CAN_QUEUE_VAL, 144 .cmd_per_lun = 1, 145 .this_id = -1, 146 .sg_tablesize = SG_ALL, 147 .max_sectors = SCSI_DEFAULT_MAX_SECTORS, 148 .use_clustering = ENABLE_CLUSTERING, 149 .eh_device_reset_handler = sas_eh_device_reset_handler, 150 .eh_bus_reset_handler = isci_bus_reset_handler, 151 .slave_alloc = sas_slave_alloc, 152 .target_destroy = sas_target_destroy, 153 .ioctl = sas_ioctl, 154}; 155 156static struct sas_domain_function_template isci_transport_ops = { 157 158 /* The class calls these to notify the LLDD of an event. */ 159 .lldd_port_formed = isci_port_formed, 160 .lldd_port_deformed = isci_port_deformed, 161 162 /* The class calls these when a device is found or gone. */ 163 .lldd_dev_found = isci_remote_device_found, 164 .lldd_dev_gone = isci_remote_device_gone, 165 166 .lldd_execute_task = isci_task_execute_task, 167 /* Task Management Functions. Must be called from process context. */ 168 .lldd_abort_task = isci_task_abort_task, 169 .lldd_abort_task_set = isci_task_abort_task_set, 170 .lldd_clear_aca = isci_task_clear_aca, 171 .lldd_clear_task_set = isci_task_clear_task_set, 172 .lldd_I_T_nexus_reset = isci_task_I_T_nexus_reset, 173 .lldd_lu_reset = isci_task_lu_reset, 174 .lldd_query_task = isci_task_query_task, 175 176 /* Port and Adapter management */ 177 .lldd_clear_nexus_port = isci_task_clear_nexus_port, 178 .lldd_clear_nexus_ha = isci_task_clear_nexus_ha, 179 180 /* Phy management */ 181 .lldd_control_phy = isci_phy_control, 182}; 183 184 185/****************************************************************************** 186* P R O T E C T E D M E T H O D S 187******************************************************************************/ 188 189 190 191/** 192 * isci_register_sas_ha() - This method initializes various lldd 193 * specific members of the sas_ha struct and calls the libsas 194 * sas_register_ha() function. 195 * @isci_host: This parameter specifies the lldd specific wrapper for the 196 * libsas sas_ha struct. 197 * 198 * This method returns an error code indicating sucess or failure. The user 199 * should check for possible memory allocation error return otherwise, a zero 200 * indicates success. 201 */ 202static int isci_register_sas_ha(struct isci_host *isci_host) 203{ 204 int i; 205 struct sas_ha_struct *sas_ha = &(isci_host->sas_ha); 206 struct asd_sas_phy **sas_phys; 207 struct asd_sas_port **sas_ports; 208 209 sas_phys = devm_kzalloc(&isci_host->pdev->dev, 210 SCI_MAX_PHYS * sizeof(void *), 211 GFP_KERNEL); 212 if (!sas_phys) 213 return -ENOMEM; 214 215 sas_ports = devm_kzalloc(&isci_host->pdev->dev, 216 SCI_MAX_PORTS * sizeof(void *), 217 GFP_KERNEL); 218 if (!sas_ports) 219 return -ENOMEM; 220 221 /*----------------- Libsas Initialization Stuff---------------------- 222 * Set various fields in the sas_ha struct: 223 */ 224 225 sas_ha->sas_ha_name = DRV_NAME; 226 sas_ha->lldd_module = THIS_MODULE; 227 sas_ha->sas_addr = &isci_host->phys[0].sas_addr[0]; 228 229 /* set the array of phy and port structs. */ 230 for (i = 0; i < SCI_MAX_PHYS; i++) { 231 sas_phys[i] = &(isci_host->phys[i].sas_phy); 232 sas_ports[i] = &(isci_host->sas_ports[i]); 233 } 234 235 sas_ha->sas_phy = sas_phys; 236 sas_ha->sas_port = sas_ports; 237 sas_ha->num_phys = SCI_MAX_PHYS; 238 239 sas_ha->lldd_queue_size = ISCI_CAN_QUEUE_VAL; 240 sas_ha->lldd_max_execute_num = 1; 241 sas_ha->strict_wide_ports = 1; 242 243 sas_register_ha(sas_ha); 244 245 return 0; 246} 247 248static ssize_t isci_show_id(struct device *dev, struct device_attribute *attr, char *buf) 249{ 250 struct Scsi_Host *shost = container_of(dev, typeof(*shost), shost_dev); 251 struct sas_ha_struct *sas_ha = SHOST_TO_SAS_HA(shost); 252 struct isci_host *ihost = container_of(sas_ha, typeof(*ihost), sas_ha); 253 254 return snprintf(buf, PAGE_SIZE, "%d\n", ihost->id); 255} 256 257static DEVICE_ATTR(isci_id, S_IRUGO, isci_show_id, NULL); 258 259static void isci_unregister(struct isci_host *isci_host) 260{ 261 struct Scsi_Host *shost; 262 263 if (!isci_host) 264 return; 265 266 shost = isci_host->shost; 267 device_remove_file(&shost->shost_dev, &dev_attr_isci_id); 268 269 sas_unregister_ha(&isci_host->sas_ha); 270 271 sas_remove_host(isci_host->shost); 272 scsi_remove_host(isci_host->shost); 273 scsi_host_put(isci_host->shost); 274} 275 276static int __devinit isci_pci_init(struct pci_dev *pdev) 277{ 278 int err, bar_num, bar_mask; 279 void __iomem * const *iomap; 280 281 err = pcim_enable_device(pdev); 282 if (err) { 283 dev_err(&pdev->dev, 284 "failed enable PCI device %s!\n", 285 pci_name(pdev)); 286 return err; 287 } 288 289 for (bar_num = 0; bar_num < SCI_PCI_BAR_COUNT; bar_num++) 290 bar_mask |= 1 << (bar_num * 2); 291 292 err = pcim_iomap_regions(pdev, bar_mask, DRV_NAME); 293 if (err) 294 return err; 295 296 iomap = pcim_iomap_table(pdev); 297 if (!iomap) 298 return -ENOMEM; 299 300 pci_set_master(pdev); 301 302 err = pci_set_dma_mask(pdev, DMA_BIT_MASK(64)); 303 if (err) { 304 err = pci_set_dma_mask(pdev, DMA_BIT_MASK(32)); 305 if (err) 306 return err; 307 } 308 309 err = pci_set_consistent_dma_mask(pdev, DMA_BIT_MASK(64)); 310 if (err) { 311 err = pci_set_consistent_dma_mask(pdev, DMA_BIT_MASK(32)); 312 if (err) 313 return err; 314 } 315 316 return 0; 317} 318 319static int num_controllers(struct pci_dev *pdev) 320{ 321 /* bar size alone can tell us if we are running with a dual controller 322 * part, no need to trust revision ids that might be under broken firmware 323 * control 324 */ 325 resource_size_t scu_bar_size = pci_resource_len(pdev, SCI_SCU_BAR*2); 326 resource_size_t smu_bar_size = pci_resource_len(pdev, SCI_SMU_BAR*2); 327 328 if (scu_bar_size >= SCI_SCU_BAR_SIZE*SCI_MAX_CONTROLLERS && 329 smu_bar_size >= SCI_SMU_BAR_SIZE*SCI_MAX_CONTROLLERS) 330 return SCI_MAX_CONTROLLERS; 331 else 332 return 1; 333} 334 335static int isci_setup_interrupts(struct pci_dev *pdev) 336{ 337 int err, i, num_msix; 338 struct isci_host *ihost; 339 struct isci_pci_info *pci_info = to_pci_info(pdev); 340 341 /* 342 * Determine the number of vectors associated with this 343 * PCI function. 344 */ 345 num_msix = num_controllers(pdev) * SCI_NUM_MSI_X_INT; 346 347 for (i = 0; i < num_msix; i++) 348 pci_info->msix_entries[i].entry = i; 349 350 err = pci_enable_msix(pdev, pci_info->msix_entries, num_msix); 351 if (err) 352 goto intx; 353 354 for (i = 0; i < num_msix; i++) { 355 int id = i / SCI_NUM_MSI_X_INT; 356 struct msix_entry *msix = &pci_info->msix_entries[i]; 357 irq_handler_t isr; 358 359 ihost = pci_info->hosts[id]; 360 /* odd numbered vectors are error interrupts */ 361 if (i & 1) 362 isr = isci_error_isr; 363 else 364 isr = isci_msix_isr; 365 366 err = devm_request_irq(&pdev->dev, msix->vector, isr, 0, 367 DRV_NAME"-msix", ihost); 368 if (!err) 369 continue; 370 371 dev_info(&pdev->dev, "msix setup failed falling back to intx\n"); 372 while (i--) { 373 id = i / SCI_NUM_MSI_X_INT; 374 ihost = pci_info->hosts[id]; 375 msix = &pci_info->msix_entries[i]; 376 devm_free_irq(&pdev->dev, msix->vector, ihost); 377 } 378 pci_disable_msix(pdev); 379 goto intx; 380 } 381 return 0; 382 383 intx: 384 for_each_isci_host(i, ihost, pdev) { 385 err = devm_request_irq(&pdev->dev, pdev->irq, isci_intx_isr, 386 IRQF_SHARED, DRV_NAME"-intx", ihost); 387 if (err) 388 break; 389 } 390 return err; 391} 392 393static struct isci_host *isci_host_alloc(struct pci_dev *pdev, int id) 394{ 395 struct isci_host *isci_host; 396 struct Scsi_Host *shost; 397 int err; 398 399 isci_host = devm_kzalloc(&pdev->dev, sizeof(*isci_host) + 400 SCI_MAX_REMOTE_DEVICES * 401 (sizeof(struct isci_remote_device) + 402 scic_remote_device_get_object_size()), GFP_KERNEL); 403 if (!isci_host) 404 return NULL; 405 406 isci_host->pdev = pdev; 407 isci_host->id = id; 408 409 shost = scsi_host_alloc(&isci_sht, sizeof(void *)); 410 if (!shost) 411 return NULL; 412 isci_host->shost = shost; 413 414 err = isci_host_init(isci_host); 415 if (err) 416 goto err_shost; 417 418 SHOST_TO_SAS_HA(shost) = &isci_host->sas_ha; 419 isci_host->sas_ha.core.shost = shost; 420 shost->transportt = isci_transport_template; 421 422 shost->max_id = ~0; 423 shost->max_lun = ~0; 424 shost->max_cmd_len = MAX_COMMAND_SIZE; 425 426 err = scsi_add_host(shost, &pdev->dev); 427 if (err) 428 goto err_shost; 429 430 err = isci_register_sas_ha(isci_host); 431 if (err) 432 goto err_shost_remove; 433 434 err = device_create_file(&shost->shost_dev, &dev_attr_isci_id); 435 if (err) 436 goto err_unregister_ha; 437 438 return isci_host; 439 440 err_unregister_ha: 441 sas_unregister_ha(&(isci_host->sas_ha)); 442 err_shost_remove: 443 scsi_remove_host(shost); 444 err_shost: 445 scsi_host_put(shost); 446 447 return NULL; 448} 449 450static void check_si_rev(struct pci_dev *pdev) 451{ 452 if (num_controllers(pdev) > 1) 453 isci_si_rev = ISCI_SI_REVB0; 454 else { 455 switch (pdev->revision) { 456 case 0: 457 case 1: 458 /* if the id is ambiguous don't update isci_si_rev */ 459 break; 460 case 3: 461 isci_si_rev = ISCI_SI_REVA2; 462 break; 463 default: 464 case 4: 465 isci_si_rev = ISCI_SI_REVB0; 466 break; 467 } 468 } 469 470 dev_info(&pdev->dev, "driver configured for %s silicon (rev: %d)\n", 471 isci_si_rev == ISCI_SI_REVA0 ? "A0" : 472 isci_si_rev == ISCI_SI_REVA2 ? "A2" : "B0", pdev->revision); 473 474} 475 476static int __devinit isci_pci_probe(struct pci_dev *pdev, const struct pci_device_id *id) 477{ 478 struct isci_pci_info *pci_info; 479 int err, i; 480 struct isci_host *isci_host; 481 const struct firmware *fw = NULL; 482 struct isci_orom *orom; 483 char *source = "(platform)"; 484 485 check_si_rev(pdev); 486 487 pci_info = devm_kzalloc(&pdev->dev, sizeof(*pci_info), GFP_KERNEL); 488 if (!pci_info) 489 return -ENOMEM; 490 pci_set_drvdata(pdev, pci_info); 491 492 if (efi_enabled) 493 orom = isci_get_efi_var(pdev); 494 else 495 orom = isci_request_oprom(pdev); 496 497 for (i = 0; orom && i < ARRAY_SIZE(orom->ctrl); i++) { 498 if (scic_oem_parameters_validate(&orom->ctrl[i])) { 499 dev_warn(&pdev->dev, 500 "[%d]: invalid oem parameters detected, falling back to firmware\n", i); 501 devm_kfree(&pdev->dev, orom); 502 orom = NULL; 503 break; 504 } 505 } 506 507 if (!orom) { 508 source = "(firmware)"; 509 orom = isci_request_firmware(pdev, fw); 510 if (!orom) { 511 /* TODO convert this to WARN_TAINT_ONCE once the 512 * orom/efi parameter support is widely available 513 */ 514 dev_warn(&pdev->dev, 515 "Loading user firmware failed, using default " 516 "values\n"); 517 dev_warn(&pdev->dev, 518 "Default OEM configuration being used: 4 " 519 "narrow ports, and default SAS Addresses\n"); 520 } 521 } 522 523 if (orom) 524 dev_info(&pdev->dev, 525 "OEM SAS parameters (version: %u.%u) loaded %s\n", 526 (orom->hdr.version & 0xf0) >> 4, 527 (orom->hdr.version & 0xf), source); 528 529 pci_info->orom = orom; 530 531 err = isci_pci_init(pdev); 532 if (err) 533 return err; 534 535 for (i = 0; i < num_controllers(pdev); i++) { 536 struct isci_host *h = isci_host_alloc(pdev, i); 537 538 if (!h) { 539 err = -ENOMEM; 540 goto err_host_alloc; 541 } 542 pci_info->hosts[i] = h; 543 } 544 545 err = isci_setup_interrupts(pdev); 546 if (err) 547 goto err_host_alloc; 548 549 for_each_isci_host(i, isci_host, pdev) 550 scsi_scan_host(isci_host->shost); 551 552 return 0; 553 554 err_host_alloc: 555 for_each_isci_host(i, isci_host, pdev) 556 isci_unregister(isci_host); 557 return err; 558} 559 560static void __devexit isci_pci_remove(struct pci_dev *pdev) 561{ 562 struct isci_host *isci_host; 563 int i; 564 565 for_each_isci_host(i, isci_host, pdev) { 566 isci_unregister(isci_host); 567 isci_host_deinit(isci_host); 568 scic_controller_disable_interrupts(isci_host->core_controller); 569 } 570} 571 572static struct pci_driver isci_pci_driver = { 573 .name = DRV_NAME, 574 .id_table = isci_id_table, 575 .probe = isci_pci_probe, 576 .remove = __devexit_p(isci_pci_remove), 577}; 578 579static __init int isci_init(void) 580{ 581 int err; 582 583 pr_info("%s: Intel(R) C600 SAS Controller Driver\n", DRV_NAME); 584 585 isci_transport_template = sas_domain_attach_transport(&isci_transport_ops); 586 if (!isci_transport_template) 587 return -ENOMEM; 588 589 err = pci_register_driver(&isci_pci_driver); 590 if (err) 591 sas_release_transport(isci_transport_template); 592 593 return err; 594} 595 596static __exit void isci_exit(void) 597{ 598 pci_unregister_driver(&isci_pci_driver); 599 sas_release_transport(isci_transport_template); 600} 601 602MODULE_LICENSE("Dual BSD/GPL"); 603MODULE_FIRMWARE(ISCI_FW_NAME); 604module_init(isci_init); 605module_exit(isci_exit); 606