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