/drivers/scsi/isci/init.c
C | 793 lines | 533 code | 148 blank | 112 comment | 60 complexity | d7ba38eecd2184b4693205d841e59a8c MD5 | raw file
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 74MODULE_VERSION(DRV_VERSION); 75 76static struct scsi_transport_template *isci_transport_template; 77 78static 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 94MODULE_DEVICE_TABLE(pci, isci_id_table); 95 96/* linux isci specific settings */ 97 98unsigned char no_outbound_task_to = 2; 99module_param(no_outbound_task_to, byte, 0); 100MODULE_PARM_DESC(no_outbound_task_to, "No Outbound Task Timeout (1us incr)"); 101 102u16 ssp_max_occ_to = 20; 103module_param(ssp_max_occ_to, ushort, 0); 104MODULE_PARM_DESC(ssp_max_occ_to, "SSP Max occupancy timeout (100us incr)"); 105 106u16 stp_max_occ_to = 5; 107module_param(stp_max_occ_to, ushort, 0); 108MODULE_PARM_DESC(stp_max_occ_to, "STP Max occupancy timeout (100us incr)"); 109 110u16 ssp_inactive_to = 5; 111module_param(ssp_inactive_to, ushort, 0); 112MODULE_PARM_DESC(ssp_inactive_to, "SSP inactivity timeout (100us incr)"); 113 114u16 stp_inactive_to = 5; 115module_param(stp_inactive_to, ushort, 0); 116MODULE_PARM_DESC(stp_inactive_to, "STP inactivity timeout (100us incr)"); 117 118unsigned char phy_gen = SCIC_SDS_PARM_GEN2_SPEED; 119module_param(phy_gen, byte, 0); 120MODULE_PARM_DESC(phy_gen, "PHY generation (1: 1.5Gbps 2: 3.0Gbps 3: 6.0Gbps)"); 121 122unsigned char max_concurr_spinup; 123module_param(max_concurr_spinup, byte, 0); 124MODULE_PARM_DESC(max_concurr_spinup, "Max concurrent device spinup"); 125 126uint cable_selection_override = CABLE_OVERRIDE_DISABLED; 127module_param(cable_selection_override, uint, 0); 128 129MODULE_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 134static 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 143static DEVICE_ATTR(isci_id, S_IRUGO, isci_show_id, NULL); 144 145struct device_attribute *isci_host_attrs[] = { 146 &dev_attr_isci_id, 147 NULL 148}; 149 150static 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#ifdef CONFIG_COMPAT 172 .compat_ioctl = sas_ioctl, 173#endif 174 .shost_attrs = isci_host_attrs, 175 .track_queue_depth = 1, 176}; 177 178static struct sas_domain_function_template isci_transport_ops = { 179 180 /* The class calls these to notify the LLDD of an event. */ 181 .lldd_port_formed = isci_port_formed, 182 .lldd_port_deformed = isci_port_deformed, 183 184 /* The class calls these when a device is found or gone. */ 185 .lldd_dev_found = isci_remote_device_found, 186 .lldd_dev_gone = isci_remote_device_gone, 187 188 .lldd_execute_task = isci_task_execute_task, 189 /* Task Management Functions. Must be called from process context. */ 190 .lldd_abort_task = isci_task_abort_task, 191 .lldd_abort_task_set = isci_task_abort_task_set, 192 .lldd_clear_aca = isci_task_clear_aca, 193 .lldd_clear_task_set = isci_task_clear_task_set, 194 .lldd_I_T_nexus_reset = isci_task_I_T_nexus_reset, 195 .lldd_lu_reset = isci_task_lu_reset, 196 .lldd_query_task = isci_task_query_task, 197 198 /* ata recovery called from ata-eh */ 199 .lldd_ata_check_ready = isci_ata_check_ready, 200 201 /* Port and Adapter management */ 202 .lldd_clear_nexus_port = isci_task_clear_nexus_port, 203 .lldd_clear_nexus_ha = isci_task_clear_nexus_ha, 204 205 /* Phy management */ 206 .lldd_control_phy = isci_phy_control, 207 208 /* GPIO support */ 209 .lldd_write_gpio = isci_gpio_write, 210}; 211 212 213/****************************************************************************** 214* P R O T E C T E D M E T H O D S 215******************************************************************************/ 216 217 218 219/** 220 * isci_register_sas_ha() - This method initializes various lldd 221 * specific members of the sas_ha struct and calls the libsas 222 * sas_register_ha() function. 223 * @isci_host: This parameter specifies the lldd specific wrapper for the 224 * libsas sas_ha struct. 225 * 226 * This method returns an error code indicating success or failure. The user 227 * should check for possible memory allocation error return otherwise, a zero 228 * indicates success. 229 */ 230static int isci_register_sas_ha(struct isci_host *isci_host) 231{ 232 int i; 233 struct sas_ha_struct *sas_ha = &(isci_host->sas_ha); 234 struct asd_sas_phy **sas_phys; 235 struct asd_sas_port **sas_ports; 236 237 sas_phys = devm_kcalloc(&isci_host->pdev->dev, 238 SCI_MAX_PHYS, sizeof(void *), 239 GFP_KERNEL); 240 if (!sas_phys) 241 return -ENOMEM; 242 243 sas_ports = devm_kcalloc(&isci_host->pdev->dev, 244 SCI_MAX_PORTS, sizeof(void *), 245 GFP_KERNEL); 246 if (!sas_ports) 247 return -ENOMEM; 248 249 sas_ha->sas_ha_name = DRV_NAME; 250 sas_ha->lldd_module = THIS_MODULE; 251 sas_ha->sas_addr = &isci_host->phys[0].sas_addr[0]; 252 253 for (i = 0; i < SCI_MAX_PHYS; i++) { 254 sas_phys[i] = &isci_host->phys[i].sas_phy; 255 sas_ports[i] = &isci_host->sas_ports[i]; 256 } 257 258 sas_ha->sas_phy = sas_phys; 259 sas_ha->sas_port = sas_ports; 260 sas_ha->num_phys = SCI_MAX_PHYS; 261 262 sas_ha->strict_wide_ports = 1; 263 264 sas_register_ha(sas_ha); 265 266 return 0; 267} 268 269static void isci_unregister(struct isci_host *isci_host) 270{ 271 struct Scsi_Host *shost; 272 273 if (!isci_host) 274 return; 275 276 shost = to_shost(isci_host); 277 sas_unregister_ha(&isci_host->sas_ha); 278 279 sas_remove_host(shost); 280 scsi_host_put(shost); 281} 282 283static 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 = dma_set_mask_and_coherent(&pdev->dev, DMA_BIT_MASK(64)); 310 if (err) 311 err = dma_set_mask_and_coherent(&pdev->dev, DMA_BIT_MASK(32)); 312 return err; 313} 314 315static int num_controllers(struct pci_dev *pdev) 316{ 317 /* bar size alone can tell us if we are running with a dual controller 318 * part, no need to trust revision ids that might be under broken firmware 319 * control 320 */ 321 resource_size_t scu_bar_size = pci_resource_len(pdev, SCI_SCU_BAR*2); 322 resource_size_t smu_bar_size = pci_resource_len(pdev, SCI_SMU_BAR*2); 323 324 if (scu_bar_size >= SCI_SCU_BAR_SIZE*SCI_MAX_CONTROLLERS && 325 smu_bar_size >= SCI_SMU_BAR_SIZE*SCI_MAX_CONTROLLERS) 326 return SCI_MAX_CONTROLLERS; 327 else 328 return 1; 329} 330 331static int isci_setup_interrupts(struct pci_dev *pdev) 332{ 333 int err, i, num_msix; 334 struct isci_host *ihost; 335 struct isci_pci_info *pci_info = to_pci_info(pdev); 336 337 /* 338 * Determine the number of vectors associated with this 339 * PCI function. 340 */ 341 num_msix = num_controllers(pdev) * SCI_NUM_MSI_X_INT; 342 343 err = pci_alloc_irq_vectors(pdev, num_msix, num_msix, PCI_IRQ_MSIX); 344 if (err < 0) 345 goto intx; 346 347 for (i = 0; i < num_msix; i++) { 348 int id = i / SCI_NUM_MSI_X_INT; 349 irq_handler_t isr; 350 351 ihost = pci_info->hosts[id]; 352 /* odd numbered vectors are error interrupts */ 353 if (i & 1) 354 isr = isci_error_isr; 355 else 356 isr = isci_msix_isr; 357 358 err = devm_request_irq(&pdev->dev, pci_irq_vector(pdev, i), 359 isr, 0, DRV_NAME"-msix", ihost); 360 if (!err) 361 continue; 362 363 dev_info(&pdev->dev, "msix setup failed falling back to intx\n"); 364 while (i--) { 365 id = i / SCI_NUM_MSI_X_INT; 366 ihost = pci_info->hosts[id]; 367 devm_free_irq(&pdev->dev, pci_irq_vector(pdev, i), 368 ihost); 369 } 370 pci_free_irq_vectors(pdev); 371 goto intx; 372 } 373 return 0; 374 375 intx: 376 for_each_isci_host(i, ihost, pdev) { 377 err = devm_request_irq(&pdev->dev, pci_irq_vector(pdev, 0), 378 isci_intx_isr, IRQF_SHARED, DRV_NAME"-intx", 379 ihost); 380 if (err) 381 break; 382 } 383 return err; 384} 385 386static void isci_user_parameters_get(struct sci_user_parameters *u) 387{ 388 int i; 389 390 for (i = 0; i < SCI_MAX_PHYS; i++) { 391 struct sci_phy_user_params *u_phy = &u->phys[i]; 392 393 u_phy->max_speed_generation = phy_gen; 394 395 /* we are not exporting these for now */ 396 u_phy->align_insertion_frequency = 0x7f; 397 u_phy->in_connection_align_insertion_frequency = 0xff; 398 u_phy->notify_enable_spin_up_insertion_frequency = 0x33; 399 } 400 401 u->stp_inactivity_timeout = stp_inactive_to; 402 u->ssp_inactivity_timeout = ssp_inactive_to; 403 u->stp_max_occupancy_timeout = stp_max_occ_to; 404 u->ssp_max_occupancy_timeout = ssp_max_occ_to; 405 u->no_outbound_task_timeout = no_outbound_task_to; 406 u->max_concurr_spinup = max_concurr_spinup; 407} 408 409static enum sci_status sci_user_parameters_set(struct isci_host *ihost, 410 struct sci_user_parameters *sci_parms) 411{ 412 u16 index; 413 414 /* 415 * Validate the user parameters. If they are not legal, then 416 * return a failure. 417 */ 418 for (index = 0; index < SCI_MAX_PHYS; index++) { 419 struct sci_phy_user_params *u; 420 421 u = &sci_parms->phys[index]; 422 423 if (!((u->max_speed_generation <= SCIC_SDS_PARM_MAX_SPEED) && 424 (u->max_speed_generation > SCIC_SDS_PARM_NO_SPEED))) 425 return SCI_FAILURE_INVALID_PARAMETER_VALUE; 426 427 if ((u->in_connection_align_insertion_frequency < 3) || 428 (u->align_insertion_frequency == 0) || 429 (u->notify_enable_spin_up_insertion_frequency == 0)) 430 return SCI_FAILURE_INVALID_PARAMETER_VALUE; 431 } 432 433 if ((sci_parms->stp_inactivity_timeout == 0) || 434 (sci_parms->ssp_inactivity_timeout == 0) || 435 (sci_parms->stp_max_occupancy_timeout == 0) || 436 (sci_parms->ssp_max_occupancy_timeout == 0) || 437 (sci_parms->no_outbound_task_timeout == 0)) 438 return SCI_FAILURE_INVALID_PARAMETER_VALUE; 439 440 memcpy(&ihost->user_parameters, sci_parms, sizeof(*sci_parms)); 441 442 return SCI_SUCCESS; 443} 444 445static void sci_oem_defaults(struct isci_host *ihost) 446{ 447 /* these defaults are overridden by the platform / firmware */ 448 struct sci_user_parameters *user = &ihost->user_parameters; 449 struct sci_oem_params *oem = &ihost->oem_parameters; 450 int i; 451 452 /* Default to APC mode. */ 453 oem->controller.mode_type = SCIC_PORT_AUTOMATIC_CONFIGURATION_MODE; 454 455 /* Default to APC mode. */ 456 oem->controller.max_concurr_spin_up = 1; 457 458 /* Default to no SSC operation. */ 459 oem->controller.do_enable_ssc = false; 460 461 /* Default to short cables on all phys. */ 462 oem->controller.cable_selection_mask = 0; 463 464 /* Initialize all of the port parameter information to narrow ports. */ 465 for (i = 0; i < SCI_MAX_PORTS; i++) 466 oem->ports[i].phy_mask = 0; 467 468 /* Initialize all of the phy parameter information. */ 469 for (i = 0; i < SCI_MAX_PHYS; i++) { 470 /* Default to 3G (i.e. Gen 2). */ 471 user->phys[i].max_speed_generation = SCIC_SDS_PARM_GEN2_SPEED; 472 473 /* the frequencies cannot be 0 */ 474 user->phys[i].align_insertion_frequency = 0x7f; 475 user->phys[i].in_connection_align_insertion_frequency = 0xff; 476 user->phys[i].notify_enable_spin_up_insertion_frequency = 0x33; 477 478 /* Previous Vitesse based expanders had a arbitration issue that 479 * is worked around by having the upper 32-bits of SAS address 480 * with a value greater then the Vitesse company identifier. 481 * Hence, usage of 0x5FCFFFFF. 482 */ 483 oem->phys[i].sas_address.low = 0x1 + ihost->id; 484 oem->phys[i].sas_address.high = 0x5FCFFFFF; 485 } 486 487 user->stp_inactivity_timeout = 5; 488 user->ssp_inactivity_timeout = 5; 489 user->stp_max_occupancy_timeout = 5; 490 user->ssp_max_occupancy_timeout = 20; 491 user->no_outbound_task_timeout = 2; 492} 493 494static struct isci_host *isci_host_alloc(struct pci_dev *pdev, int id) 495{ 496 struct isci_orom *orom = to_pci_info(pdev)->orom; 497 struct sci_user_parameters sci_user_params; 498 u8 oem_version = ISCI_ROM_VER_1_0; 499 struct isci_host *ihost; 500 struct Scsi_Host *shost; 501 int err, i; 502 503 ihost = devm_kzalloc(&pdev->dev, sizeof(*ihost), GFP_KERNEL); 504 if (!ihost) 505 return NULL; 506 507 ihost->pdev = pdev; 508 ihost->id = id; 509 spin_lock_init(&ihost->scic_lock); 510 init_waitqueue_head(&ihost->eventq); 511 ihost->sas_ha.dev = &ihost->pdev->dev; 512 ihost->sas_ha.lldd_ha = ihost; 513 tasklet_init(&ihost->completion_tasklet, 514 isci_host_completion_routine, (unsigned long)ihost); 515 516 /* validate module parameters */ 517 /* TODO: kill struct sci_user_parameters and reference directly */ 518 sci_oem_defaults(ihost); 519 isci_user_parameters_get(&sci_user_params); 520 if (sci_user_parameters_set(ihost, &sci_user_params)) { 521 dev_warn(&pdev->dev, 522 "%s: sci_user_parameters_set failed\n", __func__); 523 return NULL; 524 } 525 526 /* sanity check platform (or 'firmware') oem parameters */ 527 if (orom) { 528 if (id < 0 || id >= SCI_MAX_CONTROLLERS || id > orom->hdr.num_elements) { 529 dev_warn(&pdev->dev, "parsing firmware oem parameters failed\n"); 530 return NULL; 531 } 532 ihost->oem_parameters = orom->ctrl[id]; 533 oem_version = orom->hdr.version; 534 } 535 536 /* validate oem parameters (platform, firmware, or built-in defaults) */ 537 if (sci_oem_parameters_validate(&ihost->oem_parameters, oem_version)) { 538 dev_warn(&pdev->dev, "oem parameter validation failed\n"); 539 return NULL; 540 } 541 542 for (i = 0; i < SCI_MAX_PORTS; i++) { 543 struct isci_port *iport = &ihost->ports[i]; 544 545 INIT_LIST_HEAD(&iport->remote_dev_list); 546 iport->isci_host = ihost; 547 } 548 549 for (i = 0; i < SCI_MAX_PHYS; i++) 550 isci_phy_init(&ihost->phys[i], ihost, i); 551 552 for (i = 0; i < SCI_MAX_REMOTE_DEVICES; i++) { 553 struct isci_remote_device *idev = &ihost->devices[i]; 554 555 INIT_LIST_HEAD(&idev->node); 556 } 557 558 shost = scsi_host_alloc(&isci_sht, sizeof(void *)); 559 if (!shost) 560 return NULL; 561 562 dev_info(&pdev->dev, "%sSCU controller %d: phy 3-0 cables: " 563 "{%s, %s, %s, %s}\n", 564 (is_cable_select_overridden() ? "* " : ""), ihost->id, 565 lookup_cable_names(decode_cable_selection(ihost, 3)), 566 lookup_cable_names(decode_cable_selection(ihost, 2)), 567 lookup_cable_names(decode_cable_selection(ihost, 1)), 568 lookup_cable_names(decode_cable_selection(ihost, 0))); 569 570 err = isci_host_init(ihost); 571 if (err) 572 goto err_shost; 573 574 SHOST_TO_SAS_HA(shost) = &ihost->sas_ha; 575 ihost->sas_ha.core.shost = shost; 576 shost->transportt = isci_transport_template; 577 578 shost->max_id = ~0; 579 shost->max_lun = ~0; 580 shost->max_cmd_len = MAX_COMMAND_SIZE; 581 582 /* turn on DIF support */ 583 scsi_host_set_prot(shost, 584 SHOST_DIF_TYPE1_PROTECTION | 585 SHOST_DIF_TYPE2_PROTECTION | 586 SHOST_DIF_TYPE3_PROTECTION); 587 scsi_host_set_guard(shost, SHOST_DIX_GUARD_CRC); 588 589 err = scsi_add_host(shost, &pdev->dev); 590 if (err) 591 goto err_shost; 592 593 err = isci_register_sas_ha(ihost); 594 if (err) 595 goto err_shost_remove; 596 597 return ihost; 598 599 err_shost_remove: 600 scsi_remove_host(shost); 601 err_shost: 602 scsi_host_put(shost); 603 604 return NULL; 605} 606 607static int isci_pci_probe(struct pci_dev *pdev, const struct pci_device_id *id) 608{ 609 struct isci_pci_info *pci_info; 610 int err, i; 611 struct isci_host *isci_host; 612 const struct firmware *fw = NULL; 613 struct isci_orom *orom = NULL; 614 char *source = "(platform)"; 615 616 dev_info(&pdev->dev, "driver configured for rev: %d silicon\n", 617 pdev->revision); 618 619 pci_info = devm_kzalloc(&pdev->dev, sizeof(*pci_info), GFP_KERNEL); 620 if (!pci_info) 621 return -ENOMEM; 622 pci_set_drvdata(pdev, pci_info); 623 624 if (efi_rt_services_supported(EFI_RT_SUPPORTED_GET_VARIABLE)) 625 orom = isci_get_efi_var(pdev); 626 627 if (!orom) 628 orom = isci_request_oprom(pdev); 629 630 for (i = 0; orom && i < num_controllers(pdev); i++) { 631 if (sci_oem_parameters_validate(&orom->ctrl[i], 632 orom->hdr.version)) { 633 dev_warn(&pdev->dev, 634 "[%d]: invalid oem parameters detected, falling back to firmware\n", i); 635 orom = NULL; 636 break; 637 } 638 } 639 640 if (!orom) { 641 source = "(firmware)"; 642 orom = isci_request_firmware(pdev, fw); 643 if (!orom) { 644 /* TODO convert this to WARN_TAINT_ONCE once the 645 * orom/efi parameter support is widely available 646 */ 647 dev_warn(&pdev->dev, 648 "Loading user firmware failed, using default " 649 "values\n"); 650 dev_warn(&pdev->dev, 651 "Default OEM configuration being used: 4 " 652 "narrow ports, and default SAS Addresses\n"); 653 } 654 } 655 656 if (orom) 657 dev_info(&pdev->dev, 658 "OEM SAS parameters (version: %u.%u) loaded %s\n", 659 (orom->hdr.version & 0xf0) >> 4, 660 (orom->hdr.version & 0xf), source); 661 662 pci_info->orom = orom; 663 664 err = isci_pci_init(pdev); 665 if (err) 666 return err; 667 668 for (i = 0; i < num_controllers(pdev); i++) { 669 struct isci_host *h = isci_host_alloc(pdev, i); 670 671 if (!h) { 672 err = -ENOMEM; 673 goto err_host_alloc; 674 } 675 pci_info->hosts[i] = h; 676 } 677 678 err = isci_setup_interrupts(pdev); 679 if (err) 680 goto err_host_alloc; 681 682 for_each_isci_host(i, isci_host, pdev) 683 scsi_scan_host(to_shost(isci_host)); 684 685 return 0; 686 687 err_host_alloc: 688 for_each_isci_host(i, isci_host, pdev) 689 isci_unregister(isci_host); 690 return err; 691} 692 693static void isci_pci_remove(struct pci_dev *pdev) 694{ 695 struct isci_host *ihost; 696 int i; 697 698 for_each_isci_host(i, ihost, pdev) { 699 wait_for_start(ihost); 700 isci_unregister(ihost); 701 isci_host_deinit(ihost); 702 } 703} 704 705#ifdef CONFIG_PM_SLEEP 706static int isci_suspend(struct device *dev) 707{ 708 struct pci_dev *pdev = to_pci_dev(dev); 709 struct isci_host *ihost; 710 int i; 711 712 for_each_isci_host(i, ihost, pdev) { 713 sas_suspend_ha(&ihost->sas_ha); 714 isci_host_deinit(ihost); 715 } 716 717 pci_save_state(pdev); 718 pci_disable_device(pdev); 719 pci_set_power_state(pdev, PCI_D3hot); 720 721 return 0; 722} 723 724static int isci_resume(struct device *dev) 725{ 726 struct pci_dev *pdev = to_pci_dev(dev); 727 struct isci_host *ihost; 728 int rc, i; 729 730 pci_set_power_state(pdev, PCI_D0); 731 pci_restore_state(pdev); 732 733 rc = pcim_enable_device(pdev); 734 if (rc) { 735 dev_err(&pdev->dev, 736 "enabling device failure after resume(%d)\n", rc); 737 return rc; 738 } 739 740 pci_set_master(pdev); 741 742 for_each_isci_host(i, ihost, pdev) { 743 sas_prep_resume_ha(&ihost->sas_ha); 744 745 isci_host_init(ihost); 746 isci_host_start(ihost->sas_ha.core.shost); 747 wait_for_start(ihost); 748 749 sas_resume_ha(&ihost->sas_ha); 750 } 751 752 return 0; 753} 754#endif 755 756static SIMPLE_DEV_PM_OPS(isci_pm_ops, isci_suspend, isci_resume); 757 758static struct pci_driver isci_pci_driver = { 759 .name = DRV_NAME, 760 .id_table = isci_id_table, 761 .probe = isci_pci_probe, 762 .remove = isci_pci_remove, 763 .driver.pm = &isci_pm_ops, 764}; 765 766static __init int isci_init(void) 767{ 768 int err; 769 770 pr_info("%s: Intel(R) C600 SAS Controller Driver - version %s\n", 771 DRV_NAME, DRV_VERSION); 772 773 isci_transport_template = sas_domain_attach_transport(&isci_transport_ops); 774 if (!isci_transport_template) 775 return -ENOMEM; 776 777 err = pci_register_driver(&isci_pci_driver); 778 if (err) 779 sas_release_transport(isci_transport_template); 780 781 return err; 782} 783 784static __exit void isci_exit(void) 785{ 786 pci_unregister_driver(&isci_pci_driver); 787 sas_release_transport(isci_transport_template); 788} 789 790MODULE_LICENSE("Dual BSD/GPL"); 791MODULE_FIRMWARE(ISCI_FW_NAME); 792module_init(isci_init); 793module_exit(isci_exit);