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 <scsi/scsi_host.h> 63 #include "host.h" 64 #include "isci.h" 65 #include "task.h" 66 #include "probe_roms.h" 67 68 #define MAJ 1 69 #define MIN 2 70 #define BUILD 0 71 #define DRV_VERSION __stringify(MAJ) "." __stringify(MIN) "." \ 72 __stringify(BUILD) 73 74 MODULE_VERSION(DRV_VERSION); 75 76 static struct scsi_transport_template *isci_transport_template; 77 78 static const struct pci_device_id isci_id_table[] = { 79 { PCI_VDEVICE(INTEL, 0x1D61),}, 80 { PCI_VDEVICE(INTEL, 0x1D63),}, 81 { PCI_VDEVICE(INTEL, 0x1D65),}, 82 { PCI_VDEVICE(INTEL, 0x1D67),}, 83 { PCI_VDEVICE(INTEL, 0x1D69),}, 84 { PCI_VDEVICE(INTEL, 0x1D6B),}, 85 { PCI_VDEVICE(INTEL, 0x1D60),}, 86 { PCI_VDEVICE(INTEL, 0x1D62),}, 87 { PCI_VDEVICE(INTEL, 0x1D64),}, 88 { PCI_VDEVICE(INTEL, 0x1D66),}, 89 { PCI_VDEVICE(INTEL, 0x1D68),}, 90 { PCI_VDEVICE(INTEL, 0x1D6A),}, 91 {} 92 }; 93 94 MODULE_DEVICE_TABLE(pci, isci_id_table); 95 96 /* linux isci specific settings */ 97 98 unsigned char no_outbound_task_to = 2; 99 module_param(no_outbound_task_to, byte, 0); 100 MODULE_PARM_DESC(no_outbound_task_to, "No Outbound Task Timeout (1us incr)"); 101 102 u16 ssp_max_occ_to = 20; 103 module_param(ssp_max_occ_to, ushort, 0); 104 MODULE_PARM_DESC(ssp_max_occ_to, "SSP Max occupancy timeout (100us incr)"); 105 106 u16 stp_max_occ_to = 5; 107 module_param(stp_max_occ_to, ushort, 0); 108 MODULE_PARM_DESC(stp_max_occ_to, "STP Max occupancy timeout (100us incr)"); 109 110 u16 ssp_inactive_to = 5; 111 module_param(ssp_inactive_to, ushort, 0); 112 MODULE_PARM_DESC(ssp_inactive_to, "SSP inactivity timeout (100us incr)"); 113 114 u16 stp_inactive_to = 5; 115 module_param(stp_inactive_to, ushort, 0); 116 MODULE_PARM_DESC(stp_inactive_to, "STP inactivity timeout (100us incr)"); 117 118 unsigned char phy_gen = SCIC_SDS_PARM_GEN2_SPEED; 119 module_param(phy_gen, byte, 0); 120 MODULE_PARM_DESC(phy_gen, "PHY generation (1: 1.5Gbps 2: 3.0Gbps 3: 6.0Gbps)"); 121 122 unsigned char max_concurr_spinup; 123 module_param(max_concurr_spinup, byte, 0); 124 MODULE_PARM_DESC(max_concurr_spinup, "Max concurrent device spinup"); 125 126 uint cable_selection_override = CABLE_OVERRIDE_DISABLED; 127 module_param(cable_selection_override, uint, 0); 128 129 MODULE_PARM_DESC(cable_selection_override, 130 "This field indicates length of the SAS/SATA cable between " 131 "host and device. If any bits > 15 are set (default) " 132 "indicates \"use platform defaults\""); 133 134 static ssize_t isci_show_id(struct device *dev, struct device_attribute *attr, char *buf) 135 { 136 struct Scsi_Host *shost = container_of(dev, typeof(*shost), shost_dev); 137 struct sas_ha_struct *sas_ha = SHOST_TO_SAS_HA(shost); 138 struct isci_host *ihost = container_of(sas_ha, typeof(*ihost), sas_ha); 139 140 return snprintf(buf, PAGE_SIZE, "%d\n", ihost->id); 141 } 142 143 static DEVICE_ATTR(isci_id, S_IRUGO, isci_show_id, NULL); 144 145 struct device_attribute *isci_host_attrs[] = { 146 &dev_attr_isci_id, 147 NULL 148 }; 149 150 static struct scsi_host_template isci_sht = { 151 152 .module = THIS_MODULE, 153 .name = DRV_NAME, 154 .proc_name = DRV_NAME, 155 .queuecommand = sas_queuecommand, 156 .target_alloc = sas_target_alloc, 157 .slave_configure = sas_slave_configure, 158 .scan_finished = isci_host_scan_finished, 159 .scan_start = isci_host_start, 160 .change_queue_depth = sas_change_queue_depth, 161 .change_queue_type = sas_change_queue_type, 162 .bios_param = sas_bios_param, 163 .can_queue = ISCI_CAN_QUEUE_VAL, 164 .cmd_per_lun = 1, 165 .this_id = -1, 166 .sg_tablesize = SG_ALL, 167 .max_sectors = SCSI_DEFAULT_MAX_SECTORS, 168 .use_clustering = ENABLE_CLUSTERING, 169 .eh_abort_handler = sas_eh_abort_handler, 170 .eh_device_reset_handler = sas_eh_device_reset_handler, 171 .eh_bus_reset_handler = sas_eh_bus_reset_handler, 172 .target_destroy = sas_target_destroy, 173 .ioctl = sas_ioctl, 174 .shost_attrs = isci_host_attrs, 175 }; 176 177 static struct sas_domain_function_template isci_transport_ops = { 178 179 /* The class calls these to notify the LLDD of an event. */ 180 .lldd_port_formed = isci_port_formed, 181 .lldd_port_deformed = isci_port_deformed, 182 183 /* The class calls these when a device is found or gone. */ 184 .lldd_dev_found = isci_remote_device_found, 185 .lldd_dev_gone = isci_remote_device_gone, 186 187 .lldd_execute_task = isci_task_execute_task, 188 /* Task Management Functions. Must be called from process context. */ 189 .lldd_abort_task = isci_task_abort_task, 190 .lldd_abort_task_set = isci_task_abort_task_set, 191 .lldd_clear_aca = isci_task_clear_aca, 192 .lldd_clear_task_set = isci_task_clear_task_set, 193 .lldd_I_T_nexus_reset = isci_task_I_T_nexus_reset, 194 .lldd_lu_reset = isci_task_lu_reset, 195 .lldd_query_task = isci_task_query_task, 196 197 /* ata recovery called from ata-eh */ 198 .lldd_ata_check_ready = isci_ata_check_ready, 199 200 /* Port and Adapter management */ 201 .lldd_clear_nexus_port = isci_task_clear_nexus_port, 202 .lldd_clear_nexus_ha = isci_task_clear_nexus_ha, 203 204 /* Phy management */ 205 .lldd_control_phy = isci_phy_control, 206 207 /* GPIO support */ 208 .lldd_write_gpio = isci_gpio_write, 209 }; 210 211 212 /****************************************************************************** 213 * P R O T E C T E D M E T H O D S 214 ******************************************************************************/ 215 216 217 218 /** 219 * isci_register_sas_ha() - This method initializes various lldd 220 * specific members of the sas_ha struct and calls the libsas 221 * sas_register_ha() function. 222 * @isci_host: This parameter specifies the lldd specific wrapper for the 223 * libsas sas_ha struct. 224 * 225 * This method returns an error code indicating success or failure. The user 226 * should check for possible memory allocation error return otherwise, a zero 227 * indicates success. 228 */ 229 static int isci_register_sas_ha(struct isci_host *isci_host) 230 { 231 int i; 232 struct sas_ha_struct *sas_ha = &(isci_host->sas_ha); 233 struct asd_sas_phy **sas_phys; 234 struct asd_sas_port **sas_ports; 235 236 sas_phys = devm_kzalloc(&isci_host->pdev->dev, 237 SCI_MAX_PHYS * sizeof(void *), 238 GFP_KERNEL); 239 if (!sas_phys) 240 return -ENOMEM; 241 242 sas_ports = devm_kzalloc(&isci_host->pdev->dev, 243 SCI_MAX_PORTS * sizeof(void *), 244 GFP_KERNEL); 245 if (!sas_ports) 246 return -ENOMEM; 247 248 sas_ha->sas_ha_name = DRV_NAME; 249 sas_ha->lldd_module = THIS_MODULE; 250 sas_ha->sas_addr = &isci_host->phys[0].sas_addr[0]; 251 252 for (i = 0; i < SCI_MAX_PHYS; i++) { 253 sas_phys[i] = &isci_host->phys[i].sas_phy; 254 sas_ports[i] = &isci_host->sas_ports[i]; 255 } 256 257 sas_ha->sas_phy = sas_phys; 258 sas_ha->sas_port = sas_ports; 259 sas_ha->num_phys = SCI_MAX_PHYS; 260 261 sas_ha->lldd_queue_size = ISCI_CAN_QUEUE_VAL; 262 sas_ha->lldd_max_execute_num = 1; 263 sas_ha->strict_wide_ports = 1; 264 265 sas_register_ha(sas_ha); 266 267 return 0; 268 } 269 270 static void isci_unregister(struct isci_host *isci_host) 271 { 272 struct Scsi_Host *shost; 273 274 if (!isci_host) 275 return; 276 277 sas_unregister_ha(&isci_host->sas_ha); 278 279 shost = to_shost(isci_host); 280 sas_remove_host(shost); 281 scsi_remove_host(shost); 282 scsi_host_put(shost); 283 } 284 285 static int isci_pci_init(struct pci_dev *pdev) 286 { 287 int err, bar_num, bar_mask = 0; 288 void __iomem * const *iomap; 289 290 err = pcim_enable_device(pdev); 291 if (err) { 292 dev_err(&pdev->dev, 293 "failed enable PCI device %s!\n", 294 pci_name(pdev)); 295 return err; 296 } 297 298 for (bar_num = 0; bar_num < SCI_PCI_BAR_COUNT; bar_num++) 299 bar_mask |= 1 << (bar_num * 2); 300 301 err = pcim_iomap_regions(pdev, bar_mask, DRV_NAME); 302 if (err) 303 return err; 304 305 iomap = pcim_iomap_table(pdev); 306 if (!iomap) 307 return -ENOMEM; 308 309 pci_set_master(pdev); 310 311 err = pci_set_dma_mask(pdev, DMA_BIT_MASK(64)); 312 if (err) { 313 err = pci_set_dma_mask(pdev, DMA_BIT_MASK(32)); 314 if (err) 315 return err; 316 } 317 318 err = pci_set_consistent_dma_mask(pdev, DMA_BIT_MASK(64)); 319 if (err) { 320 err = pci_set_consistent_dma_mask(pdev, DMA_BIT_MASK(32)); 321 if (err) 322 return err; 323 } 324 325 return 0; 326 } 327 328 static int num_controllers(struct pci_dev *pdev) 329 { 330 /* bar size alone can tell us if we are running with a dual controller 331 * part, no need to trust revision ids that might be under broken firmware 332 * control 333 */ 334 resource_size_t scu_bar_size = pci_resource_len(pdev, SCI_SCU_BAR*2); 335 resource_size_t smu_bar_size = pci_resource_len(pdev, SCI_SMU_BAR*2); 336 337 if (scu_bar_size >= SCI_SCU_BAR_SIZE*SCI_MAX_CONTROLLERS && 338 smu_bar_size >= SCI_SMU_BAR_SIZE*SCI_MAX_CONTROLLERS) 339 return SCI_MAX_CONTROLLERS; 340 else 341 return 1; 342 } 343 344 static int isci_setup_interrupts(struct pci_dev *pdev) 345 { 346 int err, i, num_msix; 347 struct isci_host *ihost; 348 struct isci_pci_info *pci_info = to_pci_info(pdev); 349 350 /* 351 * Determine the number of vectors associated with this 352 * PCI function. 353 */ 354 num_msix = num_controllers(pdev) * SCI_NUM_MSI_X_INT; 355 356 for (i = 0; i < num_msix; i++) 357 pci_info->msix_entries[i].entry = i; 358 359 err = pci_enable_msix_exact(pdev, pci_info->msix_entries, num_msix); 360 if (err) 361 goto intx; 362 363 for (i = 0; i < num_msix; i++) { 364 int id = i / SCI_NUM_MSI_X_INT; 365 struct msix_entry *msix = &pci_info->msix_entries[i]; 366 irq_handler_t isr; 367 368 ihost = pci_info->hosts[id]; 369 /* odd numbered vectors are error interrupts */ 370 if (i & 1) 371 isr = isci_error_isr; 372 else 373 isr = isci_msix_isr; 374 375 err = devm_request_irq(&pdev->dev, msix->vector, isr, 0, 376 DRV_NAME"-msix", ihost); 377 if (!err) 378 continue; 379 380 dev_info(&pdev->dev, "msix setup failed falling back to intx\n"); 381 while (i--) { 382 id = i / SCI_NUM_MSI_X_INT; 383 ihost = pci_info->hosts[id]; 384 msix = &pci_info->msix_entries[i]; 385 devm_free_irq(&pdev->dev, msix->vector, ihost); 386 } 387 pci_disable_msix(pdev); 388 goto intx; 389 } 390 return 0; 391 392 intx: 393 for_each_isci_host(i, ihost, pdev) { 394 err = devm_request_irq(&pdev->dev, pdev->irq, isci_intx_isr, 395 IRQF_SHARED, DRV_NAME"-intx", ihost); 396 if (err) 397 break; 398 } 399 return err; 400 } 401 402 static void isci_user_parameters_get(struct sci_user_parameters *u) 403 { 404 int i; 405 406 for (i = 0; i < SCI_MAX_PHYS; i++) { 407 struct sci_phy_user_params *u_phy = &u->phys[i]; 408 409 u_phy->max_speed_generation = phy_gen; 410 411 /* we are not exporting these for now */ 412 u_phy->align_insertion_frequency = 0x7f; 413 u_phy->in_connection_align_insertion_frequency = 0xff; 414 u_phy->notify_enable_spin_up_insertion_frequency = 0x33; 415 } 416 417 u->stp_inactivity_timeout = stp_inactive_to; 418 u->ssp_inactivity_timeout = ssp_inactive_to; 419 u->stp_max_occupancy_timeout = stp_max_occ_to; 420 u->ssp_max_occupancy_timeout = ssp_max_occ_to; 421 u->no_outbound_task_timeout = no_outbound_task_to; 422 u->max_concurr_spinup = max_concurr_spinup; 423 } 424 425 static enum sci_status sci_user_parameters_set(struct isci_host *ihost, 426 struct sci_user_parameters *sci_parms) 427 { 428 u16 index; 429 430 /* 431 * Validate the user parameters. If they are not legal, then 432 * return a failure. 433 */ 434 for (index = 0; index < SCI_MAX_PHYS; index++) { 435 struct sci_phy_user_params *u; 436 437 u = &sci_parms->phys[index]; 438 439 if (!((u->max_speed_generation <= SCIC_SDS_PARM_MAX_SPEED) && 440 (u->max_speed_generation > SCIC_SDS_PARM_NO_SPEED))) 441 return SCI_FAILURE_INVALID_PARAMETER_VALUE; 442 443 if (u->in_connection_align_insertion_frequency < 3) 444 return SCI_FAILURE_INVALID_PARAMETER_VALUE; 445 446 if ((u->in_connection_align_insertion_frequency < 3) || 447 (u->align_insertion_frequency == 0) || 448 (u->notify_enable_spin_up_insertion_frequency == 0)) 449 return SCI_FAILURE_INVALID_PARAMETER_VALUE; 450 } 451 452 if ((sci_parms->stp_inactivity_timeout == 0) || 453 (sci_parms->ssp_inactivity_timeout == 0) || 454 (sci_parms->stp_max_occupancy_timeout == 0) || 455 (sci_parms->ssp_max_occupancy_timeout == 0) || 456 (sci_parms->no_outbound_task_timeout == 0)) 457 return SCI_FAILURE_INVALID_PARAMETER_VALUE; 458 459 memcpy(&ihost->user_parameters, sci_parms, sizeof(*sci_parms)); 460 461 return SCI_SUCCESS; 462 } 463 464 static void sci_oem_defaults(struct isci_host *ihost) 465 { 466 /* these defaults are overridden by the platform / firmware */ 467 struct sci_user_parameters *user = &ihost->user_parameters; 468 struct sci_oem_params *oem = &ihost->oem_parameters; 469 int i; 470 471 /* Default to APC mode. */ 472 oem->controller.mode_type = SCIC_PORT_AUTOMATIC_CONFIGURATION_MODE; 473 474 /* Default to APC mode. */ 475 oem->controller.max_concurr_spin_up = 1; 476 477 /* Default to no SSC operation. */ 478 oem->controller.do_enable_ssc = false; 479 480 /* Default to short cables on all phys. */ 481 oem->controller.cable_selection_mask = 0; 482 483 /* Initialize all of the port parameter information to narrow ports. */ 484 for (i = 0; i < SCI_MAX_PORTS; i++) 485 oem->ports[i].phy_mask = 0; 486 487 /* Initialize all of the phy parameter information. */ 488 for (i = 0; i < SCI_MAX_PHYS; i++) { 489 /* Default to 3G (i.e. Gen 2). */ 490 user->phys[i].max_speed_generation = SCIC_SDS_PARM_GEN2_SPEED; 491 492 /* the frequencies cannot be 0 */ 493 user->phys[i].align_insertion_frequency = 0x7f; 494 user->phys[i].in_connection_align_insertion_frequency = 0xff; 495 user->phys[i].notify_enable_spin_up_insertion_frequency = 0x33; 496 497 /* Previous Vitesse based expanders had a arbitration issue that 498 * is worked around by having the upper 32-bits of SAS address 499 * with a value greater then the Vitesse company identifier. 500 * Hence, usage of 0x5FCFFFFF. 501 */ 502 oem->phys[i].sas_address.low = 0x1 + ihost->id; 503 oem->phys[i].sas_address.high = 0x5FCFFFFF; 504 } 505 506 user->stp_inactivity_timeout = 5; 507 user->ssp_inactivity_timeout = 5; 508 user->stp_max_occupancy_timeout = 5; 509 user->ssp_max_occupancy_timeout = 20; 510 user->no_outbound_task_timeout = 2; 511 } 512 513 static struct isci_host *isci_host_alloc(struct pci_dev *pdev, int id) 514 { 515 struct isci_orom *orom = to_pci_info(pdev)->orom; 516 struct sci_user_parameters sci_user_params; 517 u8 oem_version = ISCI_ROM_VER_1_0; 518 struct isci_host *ihost; 519 struct Scsi_Host *shost; 520 int err, i; 521 522 ihost = devm_kzalloc(&pdev->dev, sizeof(*ihost), GFP_KERNEL); 523 if (!ihost) 524 return NULL; 525 526 ihost->pdev = pdev; 527 ihost->id = id; 528 spin_lock_init(&ihost->scic_lock); 529 init_waitqueue_head(&ihost->eventq); 530 ihost->sas_ha.dev = &ihost->pdev->dev; 531 ihost->sas_ha.lldd_ha = ihost; 532 tasklet_init(&ihost->completion_tasklet, 533 isci_host_completion_routine, (unsigned long)ihost); 534 535 /* validate module parameters */ 536 /* TODO: kill struct sci_user_parameters and reference directly */ 537 sci_oem_defaults(ihost); 538 isci_user_parameters_get(&sci_user_params); 539 if (sci_user_parameters_set(ihost, &sci_user_params)) { 540 dev_warn(&pdev->dev, 541 "%s: sci_user_parameters_set failed\n", __func__); 542 return NULL; 543 } 544 545 /* sanity check platform (or 'firmware') oem parameters */ 546 if (orom) { 547 if (id < 0 || id >= SCI_MAX_CONTROLLERS || id > orom->hdr.num_elements) { 548 dev_warn(&pdev->dev, "parsing firmware oem parameters failed\n"); 549 return NULL; 550 } 551 ihost->oem_parameters = orom->ctrl[id]; 552 oem_version = orom->hdr.version; 553 } 554 555 /* validate oem parameters (platform, firmware, or built-in defaults) */ 556 if (sci_oem_parameters_validate(&ihost->oem_parameters, oem_version)) { 557 dev_warn(&pdev->dev, "oem parameter validation failed\n"); 558 return NULL; 559 } 560 561 for (i = 0; i < SCI_MAX_PORTS; i++) { 562 struct isci_port *iport = &ihost->ports[i]; 563 564 INIT_LIST_HEAD(&iport->remote_dev_list); 565 iport->isci_host = ihost; 566 } 567 568 for (i = 0; i < SCI_MAX_PHYS; i++) 569 isci_phy_init(&ihost->phys[i], ihost, i); 570 571 for (i = 0; i < SCI_MAX_REMOTE_DEVICES; i++) { 572 struct isci_remote_device *idev = &ihost->devices[i]; 573 574 INIT_LIST_HEAD(&idev->node); 575 } 576 577 shost = scsi_host_alloc(&isci_sht, sizeof(void *)); 578 if (!shost) 579 return NULL; 580 581 dev_info(&pdev->dev, "%sSCU controller %d: phy 3-0 cables: " 582 "{%s, %s, %s, %s}\n", 583 (is_cable_select_overridden() ? "* " : ""), ihost->id, 584 lookup_cable_names(decode_cable_selection(ihost, 3)), 585 lookup_cable_names(decode_cable_selection(ihost, 2)), 586 lookup_cable_names(decode_cable_selection(ihost, 1)), 587 lookup_cable_names(decode_cable_selection(ihost, 0))); 588 589 err = isci_host_init(ihost); 590 if (err) 591 goto err_shost; 592 593 SHOST_TO_SAS_HA(shost) = &ihost->sas_ha; 594 ihost->sas_ha.core.shost = shost; 595 shost->transportt = isci_transport_template; 596 597 shost->max_id = ~0; 598 shost->max_lun = ~0; 599 shost->max_cmd_len = MAX_COMMAND_SIZE; 600 601 err = scsi_add_host(shost, &pdev->dev); 602 if (err) 603 goto err_shost; 604 605 err = isci_register_sas_ha(ihost); 606 if (err) 607 goto err_shost_remove; 608 609 return ihost; 610 611 err_shost_remove: 612 scsi_remove_host(shost); 613 err_shost: 614 scsi_host_put(shost); 615 616 return NULL; 617 } 618 619 static int isci_pci_probe(struct pci_dev *pdev, const struct pci_device_id *id) 620 { 621 struct isci_pci_info *pci_info; 622 int err, i; 623 struct isci_host *isci_host; 624 const struct firmware *fw = NULL; 625 struct isci_orom *orom = NULL; 626 char *source = "(platform)"; 627 628 dev_info(&pdev->dev, "driver configured for rev: %d silicon\n", 629 pdev->revision); 630 631 pci_info = devm_kzalloc(&pdev->dev, sizeof(*pci_info), GFP_KERNEL); 632 if (!pci_info) 633 return -ENOMEM; 634 pci_set_drvdata(pdev, pci_info); 635 636 if (efi_enabled(EFI_RUNTIME_SERVICES)) 637 orom = isci_get_efi_var(pdev); 638 639 if (!orom) 640 orom = isci_request_oprom(pdev); 641 642 for (i = 0; orom && i < num_controllers(pdev); i++) { 643 if (sci_oem_parameters_validate(&orom->ctrl[i], 644 orom->hdr.version)) { 645 dev_warn(&pdev->dev, 646 "[%d]: invalid oem parameters detected, falling back to firmware\n", i); 647 orom = NULL; 648 break; 649 } 650 } 651 652 if (!orom) { 653 source = "(firmware)"; 654 orom = isci_request_firmware(pdev, fw); 655 if (!orom) { 656 /* TODO convert this to WARN_TAINT_ONCE once the 657 * orom/efi parameter support is widely available 658 */ 659 dev_warn(&pdev->dev, 660 "Loading user firmware failed, using default " 661 "values\n"); 662 dev_warn(&pdev->dev, 663 "Default OEM configuration being used: 4 " 664 "narrow ports, and default SAS Addresses\n"); 665 } 666 } 667 668 if (orom) 669 dev_info(&pdev->dev, 670 "OEM SAS parameters (version: %u.%u) loaded %s\n", 671 (orom->hdr.version & 0xf0) >> 4, 672 (orom->hdr.version & 0xf), source); 673 674 pci_info->orom = orom; 675 676 err = isci_pci_init(pdev); 677 if (err) 678 return err; 679 680 for (i = 0; i < num_controllers(pdev); i++) { 681 struct isci_host *h = isci_host_alloc(pdev, i); 682 683 if (!h) { 684 err = -ENOMEM; 685 goto err_host_alloc; 686 } 687 pci_info->hosts[i] = h; 688 689 /* turn on DIF support */ 690 scsi_host_set_prot(to_shost(h), 691 SHOST_DIF_TYPE1_PROTECTION | 692 SHOST_DIF_TYPE2_PROTECTION | 693 SHOST_DIF_TYPE3_PROTECTION); 694 scsi_host_set_guard(to_shost(h), SHOST_DIX_GUARD_CRC); 695 } 696 697 err = isci_setup_interrupts(pdev); 698 if (err) 699 goto err_host_alloc; 700 701 for_each_isci_host(i, isci_host, pdev) 702 scsi_scan_host(to_shost(isci_host)); 703 704 return 0; 705 706 err_host_alloc: 707 for_each_isci_host(i, isci_host, pdev) 708 isci_unregister(isci_host); 709 return err; 710 } 711 712 static void isci_pci_remove(struct pci_dev *pdev) 713 { 714 struct isci_host *ihost; 715 int i; 716 717 for_each_isci_host(i, ihost, pdev) { 718 wait_for_start(ihost); 719 isci_unregister(ihost); 720 isci_host_deinit(ihost); 721 } 722 } 723 724 #ifdef CONFIG_PM_SLEEP 725 static int isci_suspend(struct device *dev) 726 { 727 struct pci_dev *pdev = to_pci_dev(dev); 728 struct isci_host *ihost; 729 int i; 730 731 for_each_isci_host(i, ihost, pdev) { 732 sas_suspend_ha(&ihost->sas_ha); 733 isci_host_deinit(ihost); 734 } 735 736 pci_save_state(pdev); 737 pci_disable_device(pdev); 738 pci_set_power_state(pdev, PCI_D3hot); 739 740 return 0; 741 } 742 743 static int isci_resume(struct device *dev) 744 { 745 struct pci_dev *pdev = to_pci_dev(dev); 746 struct isci_host *ihost; 747 int rc, i; 748 749 pci_set_power_state(pdev, PCI_D0); 750 pci_restore_state(pdev); 751 752 rc = pcim_enable_device(pdev); 753 if (rc) { 754 dev_err(&pdev->dev, 755 "enabling device failure after resume(%d)\n", rc); 756 return rc; 757 } 758 759 pci_set_master(pdev); 760 761 for_each_isci_host(i, ihost, pdev) { 762 sas_prep_resume_ha(&ihost->sas_ha); 763 764 isci_host_init(ihost); 765 isci_host_start(ihost->sas_ha.core.shost); 766 wait_for_start(ihost); 767 768 sas_resume_ha(&ihost->sas_ha); 769 } 770 771 return 0; 772 } 773 #endif 774 775 static SIMPLE_DEV_PM_OPS(isci_pm_ops, isci_suspend, isci_resume); 776 777 static struct pci_driver isci_pci_driver = { 778 .name = DRV_NAME, 779 .id_table = isci_id_table, 780 .probe = isci_pci_probe, 781 .remove = isci_pci_remove, 782 .driver.pm = &isci_pm_ops, 783 }; 784 785 static __init int isci_init(void) 786 { 787 int err; 788 789 pr_info("%s: Intel(R) C600 SAS Controller Driver - version %s\n", 790 DRV_NAME, DRV_VERSION); 791 792 isci_transport_template = sas_domain_attach_transport(&isci_transport_ops); 793 if (!isci_transport_template) 794 return -ENOMEM; 795 796 err = pci_register_driver(&isci_pci_driver); 797 if (err) 798 sas_release_transport(isci_transport_template); 799 800 return err; 801 } 802 803 static __exit void isci_exit(void) 804 { 805 pci_unregister_driver(&isci_pci_driver); 806 sas_release_transport(isci_transport_template); 807 } 808 809 MODULE_LICENSE("Dual BSD/GPL"); 810 MODULE_FIRMWARE(ISCI_FW_NAME); 811 module_init(isci_init); 812 module_exit(isci_exit); 813