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