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