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 .use_blk_tags = 1, 174 .track_queue_depth = 1, 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->strict_wide_ports = 1; 262 263 sas_register_ha(sas_ha); 264 265 return 0; 266 } 267 268 static void isci_unregister(struct isci_host *isci_host) 269 { 270 struct Scsi_Host *shost; 271 272 if (!isci_host) 273 return; 274 275 sas_unregister_ha(&isci_host->sas_ha); 276 277 shost = to_shost(isci_host); 278 sas_remove_host(shost); 279 scsi_remove_host(shost); 280 scsi_host_put(shost); 281 } 282 283 static int isci_pci_init(struct pci_dev *pdev) 284 { 285 int err, bar_num, bar_mask = 0; 286 void __iomem * const *iomap; 287 288 err = pcim_enable_device(pdev); 289 if (err) { 290 dev_err(&pdev->dev, 291 "failed enable PCI device %s!\n", 292 pci_name(pdev)); 293 return err; 294 } 295 296 for (bar_num = 0; bar_num < SCI_PCI_BAR_COUNT; bar_num++) 297 bar_mask |= 1 << (bar_num * 2); 298 299 err = pcim_iomap_regions(pdev, bar_mask, DRV_NAME); 300 if (err) 301 return err; 302 303 iomap = pcim_iomap_table(pdev); 304 if (!iomap) 305 return -ENOMEM; 306 307 pci_set_master(pdev); 308 309 err = pci_set_dma_mask(pdev, DMA_BIT_MASK(64)); 310 if (err) { 311 err = pci_set_dma_mask(pdev, DMA_BIT_MASK(32)); 312 if (err) 313 return err; 314 } 315 316 err = pci_set_consistent_dma_mask(pdev, DMA_BIT_MASK(64)); 317 if (err) { 318 err = pci_set_consistent_dma_mask(pdev, DMA_BIT_MASK(32)); 319 if (err) 320 return err; 321 } 322 323 return 0; 324 } 325 326 static int num_controllers(struct pci_dev *pdev) 327 { 328 /* bar size alone can tell us if we are running with a dual controller 329 * part, no need to trust revision ids that might be under broken firmware 330 * control 331 */ 332 resource_size_t scu_bar_size = pci_resource_len(pdev, SCI_SCU_BAR*2); 333 resource_size_t smu_bar_size = pci_resource_len(pdev, SCI_SMU_BAR*2); 334 335 if (scu_bar_size >= SCI_SCU_BAR_SIZE*SCI_MAX_CONTROLLERS && 336 smu_bar_size >= SCI_SMU_BAR_SIZE*SCI_MAX_CONTROLLERS) 337 return SCI_MAX_CONTROLLERS; 338 else 339 return 1; 340 } 341 342 static int isci_setup_interrupts(struct pci_dev *pdev) 343 { 344 int err, i, num_msix; 345 struct isci_host *ihost; 346 struct isci_pci_info *pci_info = to_pci_info(pdev); 347 348 /* 349 * Determine the number of vectors associated with this 350 * PCI function. 351 */ 352 num_msix = num_controllers(pdev) * SCI_NUM_MSI_X_INT; 353 354 for (i = 0; i < num_msix; i++) 355 pci_info->msix_entries[i].entry = i; 356 357 err = pci_enable_msix_exact(pdev, pci_info->msix_entries, num_msix); 358 if (err) 359 goto intx; 360 361 for (i = 0; i < num_msix; i++) { 362 int id = i / SCI_NUM_MSI_X_INT; 363 struct msix_entry *msix = &pci_info->msix_entries[i]; 364 irq_handler_t isr; 365 366 ihost = pci_info->hosts[id]; 367 /* odd numbered vectors are error interrupts */ 368 if (i & 1) 369 isr = isci_error_isr; 370 else 371 isr = isci_msix_isr; 372 373 err = devm_request_irq(&pdev->dev, msix->vector, isr, 0, 374 DRV_NAME"-msix", ihost); 375 if (!err) 376 continue; 377 378 dev_info(&pdev->dev, "msix setup failed falling back to intx\n"); 379 while (i--) { 380 id = i / SCI_NUM_MSI_X_INT; 381 ihost = pci_info->hosts[id]; 382 msix = &pci_info->msix_entries[i]; 383 devm_free_irq(&pdev->dev, msix->vector, ihost); 384 } 385 pci_disable_msix(pdev); 386 goto intx; 387 } 388 return 0; 389 390 intx: 391 for_each_isci_host(i, ihost, pdev) { 392 err = devm_request_irq(&pdev->dev, pdev->irq, isci_intx_isr, 393 IRQF_SHARED, DRV_NAME"-intx", ihost); 394 if (err) 395 break; 396 } 397 return err; 398 } 399 400 static void isci_user_parameters_get(struct sci_user_parameters *u) 401 { 402 int i; 403 404 for (i = 0; i < SCI_MAX_PHYS; i++) { 405 struct sci_phy_user_params *u_phy = &u->phys[i]; 406 407 u_phy->max_speed_generation = phy_gen; 408 409 /* we are not exporting these for now */ 410 u_phy->align_insertion_frequency = 0x7f; 411 u_phy->in_connection_align_insertion_frequency = 0xff; 412 u_phy->notify_enable_spin_up_insertion_frequency = 0x33; 413 } 414 415 u->stp_inactivity_timeout = stp_inactive_to; 416 u->ssp_inactivity_timeout = ssp_inactive_to; 417 u->stp_max_occupancy_timeout = stp_max_occ_to; 418 u->ssp_max_occupancy_timeout = ssp_max_occ_to; 419 u->no_outbound_task_timeout = no_outbound_task_to; 420 u->max_concurr_spinup = max_concurr_spinup; 421 } 422 423 static enum sci_status sci_user_parameters_set(struct isci_host *ihost, 424 struct sci_user_parameters *sci_parms) 425 { 426 u16 index; 427 428 /* 429 * Validate the user parameters. If they are not legal, then 430 * return a failure. 431 */ 432 for (index = 0; index < SCI_MAX_PHYS; index++) { 433 struct sci_phy_user_params *u; 434 435 u = &sci_parms->phys[index]; 436 437 if (!((u->max_speed_generation <= SCIC_SDS_PARM_MAX_SPEED) && 438 (u->max_speed_generation > SCIC_SDS_PARM_NO_SPEED))) 439 return SCI_FAILURE_INVALID_PARAMETER_VALUE; 440 441 if (u->in_connection_align_insertion_frequency < 3) 442 return SCI_FAILURE_INVALID_PARAMETER_VALUE; 443 444 if ((u->in_connection_align_insertion_frequency < 3) || 445 (u->align_insertion_frequency == 0) || 446 (u->notify_enable_spin_up_insertion_frequency == 0)) 447 return SCI_FAILURE_INVALID_PARAMETER_VALUE; 448 } 449 450 if ((sci_parms->stp_inactivity_timeout == 0) || 451 (sci_parms->ssp_inactivity_timeout == 0) || 452 (sci_parms->stp_max_occupancy_timeout == 0) || 453 (sci_parms->ssp_max_occupancy_timeout == 0) || 454 (sci_parms->no_outbound_task_timeout == 0)) 455 return SCI_FAILURE_INVALID_PARAMETER_VALUE; 456 457 memcpy(&ihost->user_parameters, sci_parms, sizeof(*sci_parms)); 458 459 return SCI_SUCCESS; 460 } 461 462 static void sci_oem_defaults(struct isci_host *ihost) 463 { 464 /* these defaults are overridden by the platform / firmware */ 465 struct sci_user_parameters *user = &ihost->user_parameters; 466 struct sci_oem_params *oem = &ihost->oem_parameters; 467 int i; 468 469 /* Default to APC mode. */ 470 oem->controller.mode_type = SCIC_PORT_AUTOMATIC_CONFIGURATION_MODE; 471 472 /* Default to APC mode. */ 473 oem->controller.max_concurr_spin_up = 1; 474 475 /* Default to no SSC operation. */ 476 oem->controller.do_enable_ssc = false; 477 478 /* Default to short cables on all phys. */ 479 oem->controller.cable_selection_mask = 0; 480 481 /* Initialize all of the port parameter information to narrow ports. */ 482 for (i = 0; i < SCI_MAX_PORTS; i++) 483 oem->ports[i].phy_mask = 0; 484 485 /* Initialize all of the phy parameter information. */ 486 for (i = 0; i < SCI_MAX_PHYS; i++) { 487 /* Default to 3G (i.e. Gen 2). */ 488 user->phys[i].max_speed_generation = SCIC_SDS_PARM_GEN2_SPEED; 489 490 /* the frequencies cannot be 0 */ 491 user->phys[i].align_insertion_frequency = 0x7f; 492 user->phys[i].in_connection_align_insertion_frequency = 0xff; 493 user->phys[i].notify_enable_spin_up_insertion_frequency = 0x33; 494 495 /* Previous Vitesse based expanders had a arbitration issue that 496 * is worked around by having the upper 32-bits of SAS address 497 * with a value greater then the Vitesse company identifier. 498 * Hence, usage of 0x5FCFFFFF. 499 */ 500 oem->phys[i].sas_address.low = 0x1 + ihost->id; 501 oem->phys[i].sas_address.high = 0x5FCFFFFF; 502 } 503 504 user->stp_inactivity_timeout = 5; 505 user->ssp_inactivity_timeout = 5; 506 user->stp_max_occupancy_timeout = 5; 507 user->ssp_max_occupancy_timeout = 20; 508 user->no_outbound_task_timeout = 2; 509 } 510 511 static struct isci_host *isci_host_alloc(struct pci_dev *pdev, int id) 512 { 513 struct isci_orom *orom = to_pci_info(pdev)->orom; 514 struct sci_user_parameters sci_user_params; 515 u8 oem_version = ISCI_ROM_VER_1_0; 516 struct isci_host *ihost; 517 struct Scsi_Host *shost; 518 int err, i; 519 520 ihost = devm_kzalloc(&pdev->dev, sizeof(*ihost), GFP_KERNEL); 521 if (!ihost) 522 return NULL; 523 524 ihost->pdev = pdev; 525 ihost->id = id; 526 spin_lock_init(&ihost->scic_lock); 527 init_waitqueue_head(&ihost->eventq); 528 ihost->sas_ha.dev = &ihost->pdev->dev; 529 ihost->sas_ha.lldd_ha = ihost; 530 tasklet_init(&ihost->completion_tasklet, 531 isci_host_completion_routine, (unsigned long)ihost); 532 533 /* validate module parameters */ 534 /* TODO: kill struct sci_user_parameters and reference directly */ 535 sci_oem_defaults(ihost); 536 isci_user_parameters_get(&sci_user_params); 537 if (sci_user_parameters_set(ihost, &sci_user_params)) { 538 dev_warn(&pdev->dev, 539 "%s: sci_user_parameters_set failed\n", __func__); 540 return NULL; 541 } 542 543 /* sanity check platform (or 'firmware') oem parameters */ 544 if (orom) { 545 if (id < 0 || id >= SCI_MAX_CONTROLLERS || id > orom->hdr.num_elements) { 546 dev_warn(&pdev->dev, "parsing firmware oem parameters failed\n"); 547 return NULL; 548 } 549 ihost->oem_parameters = orom->ctrl[id]; 550 oem_version = orom->hdr.version; 551 } 552 553 /* validate oem parameters (platform, firmware, or built-in defaults) */ 554 if (sci_oem_parameters_validate(&ihost->oem_parameters, oem_version)) { 555 dev_warn(&pdev->dev, "oem parameter validation failed\n"); 556 return NULL; 557 } 558 559 for (i = 0; i < SCI_MAX_PORTS; i++) { 560 struct isci_port *iport = &ihost->ports[i]; 561 562 INIT_LIST_HEAD(&iport->remote_dev_list); 563 iport->isci_host = ihost; 564 } 565 566 for (i = 0; i < SCI_MAX_PHYS; i++) 567 isci_phy_init(&ihost->phys[i], ihost, i); 568 569 for (i = 0; i < SCI_MAX_REMOTE_DEVICES; i++) { 570 struct isci_remote_device *idev = &ihost->devices[i]; 571 572 INIT_LIST_HEAD(&idev->node); 573 } 574 575 shost = scsi_host_alloc(&isci_sht, sizeof(void *)); 576 if (!shost) 577 return NULL; 578 579 dev_info(&pdev->dev, "%sSCU controller %d: phy 3-0 cables: " 580 "{%s, %s, %s, %s}\n", 581 (is_cable_select_overridden() ? "* " : ""), ihost->id, 582 lookup_cable_names(decode_cable_selection(ihost, 3)), 583 lookup_cable_names(decode_cable_selection(ihost, 2)), 584 lookup_cable_names(decode_cable_selection(ihost, 1)), 585 lookup_cable_names(decode_cable_selection(ihost, 0))); 586 587 err = isci_host_init(ihost); 588 if (err) 589 goto err_shost; 590 591 SHOST_TO_SAS_HA(shost) = &ihost->sas_ha; 592 ihost->sas_ha.core.shost = shost; 593 shost->transportt = isci_transport_template; 594 595 shost->max_id = ~0; 596 shost->max_lun = ~0; 597 shost->max_cmd_len = MAX_COMMAND_SIZE; 598 599 err = scsi_add_host(shost, &pdev->dev); 600 if (err) 601 goto err_shost; 602 603 err = isci_register_sas_ha(ihost); 604 if (err) 605 goto err_shost_remove; 606 607 return ihost; 608 609 err_shost_remove: 610 scsi_remove_host(shost); 611 err_shost: 612 scsi_host_put(shost); 613 614 return NULL; 615 } 616 617 static int isci_pci_probe(struct pci_dev *pdev, const struct pci_device_id *id) 618 { 619 struct isci_pci_info *pci_info; 620 int err, i; 621 struct isci_host *isci_host; 622 const struct firmware *fw = NULL; 623 struct isci_orom *orom = NULL; 624 char *source = "(platform)"; 625 626 dev_info(&pdev->dev, "driver configured for rev: %d silicon\n", 627 pdev->revision); 628 629 pci_info = devm_kzalloc(&pdev->dev, sizeof(*pci_info), GFP_KERNEL); 630 if (!pci_info) 631 return -ENOMEM; 632 pci_set_drvdata(pdev, pci_info); 633 634 if (efi_enabled(EFI_RUNTIME_SERVICES)) 635 orom = isci_get_efi_var(pdev); 636 637 if (!orom) 638 orom = isci_request_oprom(pdev); 639 640 for (i = 0; orom && i < num_controllers(pdev); i++) { 641 if (sci_oem_parameters_validate(&orom->ctrl[i], 642 orom->hdr.version)) { 643 dev_warn(&pdev->dev, 644 "[%d]: invalid oem parameters detected, falling back to firmware\n", i); 645 orom = NULL; 646 break; 647 } 648 } 649 650 if (!orom) { 651 source = "(firmware)"; 652 orom = isci_request_firmware(pdev, fw); 653 if (!orom) { 654 /* TODO convert this to WARN_TAINT_ONCE once the 655 * orom/efi parameter support is widely available 656 */ 657 dev_warn(&pdev->dev, 658 "Loading user firmware failed, using default " 659 "values\n"); 660 dev_warn(&pdev->dev, 661 "Default OEM configuration being used: 4 " 662 "narrow ports, and default SAS Addresses\n"); 663 } 664 } 665 666 if (orom) 667 dev_info(&pdev->dev, 668 "OEM SAS parameters (version: %u.%u) loaded %s\n", 669 (orom->hdr.version & 0xf0) >> 4, 670 (orom->hdr.version & 0xf), source); 671 672 pci_info->orom = orom; 673 674 err = isci_pci_init(pdev); 675 if (err) 676 return err; 677 678 for (i = 0; i < num_controllers(pdev); i++) { 679 struct isci_host *h = isci_host_alloc(pdev, i); 680 681 if (!h) { 682 err = -ENOMEM; 683 goto err_host_alloc; 684 } 685 pci_info->hosts[i] = h; 686 687 /* turn on DIF support */ 688 scsi_host_set_prot(to_shost(h), 689 SHOST_DIF_TYPE1_PROTECTION | 690 SHOST_DIF_TYPE2_PROTECTION | 691 SHOST_DIF_TYPE3_PROTECTION); 692 scsi_host_set_guard(to_shost(h), SHOST_DIX_GUARD_CRC); 693 } 694 695 err = isci_setup_interrupts(pdev); 696 if (err) 697 goto err_host_alloc; 698 699 for_each_isci_host(i, isci_host, pdev) 700 scsi_scan_host(to_shost(isci_host)); 701 702 return 0; 703 704 err_host_alloc: 705 for_each_isci_host(i, isci_host, pdev) 706 isci_unregister(isci_host); 707 return err; 708 } 709 710 static void isci_pci_remove(struct pci_dev *pdev) 711 { 712 struct isci_host *ihost; 713 int i; 714 715 for_each_isci_host(i, ihost, pdev) { 716 wait_for_start(ihost); 717 isci_unregister(ihost); 718 isci_host_deinit(ihost); 719 } 720 } 721 722 #ifdef CONFIG_PM_SLEEP 723 static int isci_suspend(struct device *dev) 724 { 725 struct pci_dev *pdev = to_pci_dev(dev); 726 struct isci_host *ihost; 727 int i; 728 729 for_each_isci_host(i, ihost, pdev) { 730 sas_suspend_ha(&ihost->sas_ha); 731 isci_host_deinit(ihost); 732 } 733 734 pci_save_state(pdev); 735 pci_disable_device(pdev); 736 pci_set_power_state(pdev, PCI_D3hot); 737 738 return 0; 739 } 740 741 static int isci_resume(struct device *dev) 742 { 743 struct pci_dev *pdev = to_pci_dev(dev); 744 struct isci_host *ihost; 745 int rc, i; 746 747 pci_set_power_state(pdev, PCI_D0); 748 pci_restore_state(pdev); 749 750 rc = pcim_enable_device(pdev); 751 if (rc) { 752 dev_err(&pdev->dev, 753 "enabling device failure after resume(%d)\n", rc); 754 return rc; 755 } 756 757 pci_set_master(pdev); 758 759 for_each_isci_host(i, ihost, pdev) { 760 sas_prep_resume_ha(&ihost->sas_ha); 761 762 isci_host_init(ihost); 763 isci_host_start(ihost->sas_ha.core.shost); 764 wait_for_start(ihost); 765 766 sas_resume_ha(&ihost->sas_ha); 767 } 768 769 return 0; 770 } 771 #endif 772 773 static SIMPLE_DEV_PM_OPS(isci_pm_ops, isci_suspend, isci_resume); 774 775 static struct pci_driver isci_pci_driver = { 776 .name = DRV_NAME, 777 .id_table = isci_id_table, 778 .probe = isci_pci_probe, 779 .remove = isci_pci_remove, 780 .driver.pm = &isci_pm_ops, 781 }; 782 783 static __init int isci_init(void) 784 { 785 int err; 786 787 pr_info("%s: Intel(R) C600 SAS Controller Driver - version %s\n", 788 DRV_NAME, DRV_VERSION); 789 790 isci_transport_template = sas_domain_attach_transport(&isci_transport_ops); 791 if (!isci_transport_template) 792 return -ENOMEM; 793 794 err = pci_register_driver(&isci_pci_driver); 795 if (err) 796 sas_release_transport(isci_transport_template); 797 798 return err; 799 } 800 801 static __exit void isci_exit(void) 802 { 803 pci_unregister_driver(&isci_pci_driver); 804 sas_release_transport(isci_transport_template); 805 } 806 807 MODULE_LICENSE("Dual BSD/GPL"); 808 MODULE_FIRMWARE(ISCI_FW_NAME); 809 module_init(isci_init); 810 module_exit(isci_exit); 811