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 .cmd_per_lun = 1, 164 .this_id = -1, 165 .sg_tablesize = SG_ALL, 166 .max_sectors = SCSI_DEFAULT_MAX_SECTORS, 167 .use_clustering = ENABLE_CLUSTERING, 168 .eh_abort_handler = sas_eh_abort_handler, 169 .eh_device_reset_handler = sas_eh_device_reset_handler, 170 .eh_bus_reset_handler = sas_eh_bus_reset_handler, 171 .target_destroy = sas_target_destroy, 172 .ioctl = sas_ioctl, 173 .shost_attrs = isci_host_attrs, 174 .use_blk_tags = 1, 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_kzalloc(&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_kzalloc(&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 sas_unregister_ha(&isci_host->sas_ha); 277 278 shost = to_shost(isci_host); 279 sas_remove_host(shost); 280 scsi_remove_host(shost); 281 scsi_host_put(shost); 282} 283 284static 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 = pci_set_dma_mask(pdev, DMA_BIT_MASK(64)); 311 if (err) { 312 err = pci_set_dma_mask(pdev, DMA_BIT_MASK(32)); 313 if (err) 314 return err; 315 } 316 317 err = pci_set_consistent_dma_mask(pdev, DMA_BIT_MASK(64)); 318 if (err) { 319 err = pci_set_consistent_dma_mask(pdev, DMA_BIT_MASK(32)); 320 if (err) 321 return err; 322 } 323 324 return 0; 325} 326 327static int num_controllers(struct pci_dev *pdev) 328{ 329 /* bar size alone can tell us if we are running with a dual controller 330 * part, no need to trust revision ids that might be under broken firmware 331 * control 332 */ 333 resource_size_t scu_bar_size = pci_resource_len(pdev, SCI_SCU_BAR*2); 334 resource_size_t smu_bar_size = pci_resource_len(pdev, SCI_SMU_BAR*2); 335 336 if (scu_bar_size >= SCI_SCU_BAR_SIZE*SCI_MAX_CONTROLLERS && 337 smu_bar_size >= SCI_SMU_BAR_SIZE*SCI_MAX_CONTROLLERS) 338 return SCI_MAX_CONTROLLERS; 339 else 340 return 1; 341} 342 343static int isci_setup_interrupts(struct pci_dev *pdev) 344{ 345 int err, i, num_msix; 346 struct isci_host *ihost; 347 struct isci_pci_info *pci_info = to_pci_info(pdev); 348 349 /* 350 * Determine the number of vectors associated with this 351 * PCI function. 352 */ 353 num_msix = num_controllers(pdev) * SCI_NUM_MSI_X_INT; 354 355 for (i = 0; i < num_msix; i++) 356 pci_info->msix_entries[i].entry = i; 357 358 err = pci_enable_msix_exact(pdev, pci_info->msix_entries, num_msix); 359 if (err) 360 goto intx; 361 362 for (i = 0; i < num_msix; i++) { 363 int id = i / SCI_NUM_MSI_X_INT; 364 struct msix_entry *msix = &pci_info->msix_entries[i]; 365 irq_handler_t isr; 366 367 ihost = pci_info->hosts[id]; 368 /* odd numbered vectors are error interrupts */ 369 if (i & 1) 370 isr = isci_error_isr; 371 else 372 isr = isci_msix_isr; 373 374 err = devm_request_irq(&pdev->dev, msix->vector, isr, 0, 375 DRV_NAME"-msix", ihost); 376 if (!err) 377 continue; 378 379 dev_info(&pdev->dev, "msix setup failed falling back to intx\n"); 380 while (i--) { 381 id = i / SCI_NUM_MSI_X_INT; 382 ihost = pci_info->hosts[id]; 383 msix = &pci_info->msix_entries[i]; 384 devm_free_irq(&pdev->dev, msix->vector, ihost); 385 } 386 pci_disable_msix(pdev); 387 goto intx; 388 } 389 return 0; 390 391 intx: 392 for_each_isci_host(i, ihost, pdev) { 393 err = devm_request_irq(&pdev->dev, pdev->irq, isci_intx_isr, 394 IRQF_SHARED, DRV_NAME"-intx", ihost); 395 if (err) 396 break; 397 } 398 return err; 399} 400 401static void isci_user_parameters_get(struct sci_user_parameters *u) 402{ 403 int i; 404 405 for (i = 0; i < SCI_MAX_PHYS; i++) { 406 struct sci_phy_user_params *u_phy = &u->phys[i]; 407 408 u_phy->max_speed_generation = phy_gen; 409 410 /* we are not exporting these for now */ 411 u_phy->align_insertion_frequency = 0x7f; 412 u_phy->in_connection_align_insertion_frequency = 0xff; 413 u_phy->notify_enable_spin_up_insertion_frequency = 0x33; 414 } 415 416 u->stp_inactivity_timeout = stp_inactive_to; 417 u->ssp_inactivity_timeout = ssp_inactive_to; 418 u->stp_max_occupancy_timeout = stp_max_occ_to; 419 u->ssp_max_occupancy_timeout = ssp_max_occ_to; 420 u->no_outbound_task_timeout = no_outbound_task_to; 421 u->max_concurr_spinup = max_concurr_spinup; 422} 423 424static enum sci_status sci_user_parameters_set(struct isci_host *ihost, 425 struct sci_user_parameters *sci_parms) 426{ 427 u16 index; 428 429 /* 430 * Validate the user parameters. If they are not legal, then 431 * return a failure. 432 */ 433 for (index = 0; index < SCI_MAX_PHYS; index++) { 434 struct sci_phy_user_params *u; 435 436 u = &sci_parms->phys[index]; 437 438 if (!((u->max_speed_generation <= SCIC_SDS_PARM_MAX_SPEED) && 439 (u->max_speed_generation > SCIC_SDS_PARM_NO_SPEED))) 440 return SCI_FAILURE_INVALID_PARAMETER_VALUE; 441 442 if (u->in_connection_align_insertion_frequency < 3) 443 return SCI_FAILURE_INVALID_PARAMETER_VALUE; 444 445 if ((u->in_connection_align_insertion_frequency < 3) || 446 (u->align_insertion_frequency == 0) || 447 (u->notify_enable_spin_up_insertion_frequency == 0)) 448 return SCI_FAILURE_INVALID_PARAMETER_VALUE; 449 } 450 451 if ((sci_parms->stp_inactivity_timeout == 0) || 452 (sci_parms->ssp_inactivity_timeout == 0) || 453 (sci_parms->stp_max_occupancy_timeout == 0) || 454 (sci_parms->ssp_max_occupancy_timeout == 0) || 455 (sci_parms->no_outbound_task_timeout == 0)) 456 return SCI_FAILURE_INVALID_PARAMETER_VALUE; 457 458 memcpy(&ihost->user_parameters, sci_parms, sizeof(*sci_parms)); 459 460 return SCI_SUCCESS; 461} 462 463static void sci_oem_defaults(struct isci_host *ihost) 464{ 465 /* these defaults are overridden by the platform / firmware */ 466 struct sci_user_parameters *user = &ihost->user_parameters; 467 struct sci_oem_params *oem = &ihost->oem_parameters; 468 int i; 469 470 /* Default to APC mode. */ 471 oem->controller.mode_type = SCIC_PORT_AUTOMATIC_CONFIGURATION_MODE; 472 473 /* Default to APC mode. */ 474 oem->controller.max_concurr_spin_up = 1; 475 476 /* Default to no SSC operation. */ 477 oem->controller.do_enable_ssc = false; 478 479 /* Default to short cables on all phys. */ 480 oem->controller.cable_selection_mask = 0; 481 482 /* Initialize all of the port parameter information to narrow ports. */ 483 for (i = 0; i < SCI_MAX_PORTS; i++) 484 oem->ports[i].phy_mask = 0; 485 486 /* Initialize all of the phy parameter information. */ 487 for (i = 0; i < SCI_MAX_PHYS; i++) { 488 /* Default to 3G (i.e. Gen 2). */ 489 user->phys[i].max_speed_generation = SCIC_SDS_PARM_GEN2_SPEED; 490 491 /* the frequencies cannot be 0 */ 492 user->phys[i].align_insertion_frequency = 0x7f; 493 user->phys[i].in_connection_align_insertion_frequency = 0xff; 494 user->phys[i].notify_enable_spin_up_insertion_frequency = 0x33; 495 496 /* Previous Vitesse based expanders had a arbitration issue that 497 * is worked around by having the upper 32-bits of SAS address 498 * with a value greater then the Vitesse company identifier. 499 * Hence, usage of 0x5FCFFFFF. 500 */ 501 oem->phys[i].sas_address.low = 0x1 + ihost->id; 502 oem->phys[i].sas_address.high = 0x5FCFFFFF; 503 } 504 505 user->stp_inactivity_timeout = 5; 506 user->ssp_inactivity_timeout = 5; 507 user->stp_max_occupancy_timeout = 5; 508 user->ssp_max_occupancy_timeout = 20; 509 user->no_outbound_task_timeout = 2; 510} 511 512static struct isci_host *isci_host_alloc(struct pci_dev *pdev, int id) 513{ 514 struct isci_orom *orom = to_pci_info(pdev)->orom; 515 struct sci_user_parameters sci_user_params; 516 u8 oem_version = ISCI_ROM_VER_1_0; 517 struct isci_host *ihost; 518 struct Scsi_Host *shost; 519 int err, i; 520 521 ihost = devm_kzalloc(&pdev->dev, sizeof(*ihost), GFP_KERNEL); 522 if (!ihost) 523 return NULL; 524 525 ihost->pdev = pdev; 526 ihost->id = id; 527 spin_lock_init(&ihost->scic_lock); 528 init_waitqueue_head(&ihost->eventq); 529 ihost->sas_ha.dev = &ihost->pdev->dev; 530 ihost->sas_ha.lldd_ha = ihost; 531 tasklet_init(&ihost->completion_tasklet, 532 isci_host_completion_routine, (unsigned long)ihost); 533 534 /* validate module parameters */ 535 /* TODO: kill struct sci_user_parameters and reference directly */ 536 sci_oem_defaults(ihost); 537 isci_user_parameters_get(&sci_user_params); 538 if (sci_user_parameters_set(ihost, &sci_user_params)) { 539 dev_warn(&pdev->dev, 540 "%s: sci_user_parameters_set failed\n", __func__); 541 return NULL; 542 } 543 544 /* sanity check platform (or 'firmware') oem parameters */ 545 if (orom) { 546 if (id < 0 || id >= SCI_MAX_CONTROLLERS || id > orom->hdr.num_elements) { 547 dev_warn(&pdev->dev, "parsing firmware oem parameters failed\n"); 548 return NULL; 549 } 550 ihost->oem_parameters = orom->ctrl[id]; 551 oem_version = orom->hdr.version; 552 } 553 554 /* validate oem parameters (platform, firmware, or built-in defaults) */ 555 if (sci_oem_parameters_validate(&ihost->oem_parameters, oem_version)) { 556 dev_warn(&pdev->dev, "oem parameter validation failed\n"); 557 return NULL; 558 } 559 560 for (i = 0; i < SCI_MAX_PORTS; i++) { 561 struct isci_port *iport = &ihost->ports[i]; 562 563 INIT_LIST_HEAD(&iport->remote_dev_list); 564 iport->isci_host = ihost; 565 } 566 567 for (i = 0; i < SCI_MAX_PHYS; i++) 568 isci_phy_init(&ihost->phys[i], ihost, i); 569 570 for (i = 0; i < SCI_MAX_REMOTE_DEVICES; i++) { 571 struct isci_remote_device *idev = &ihost->devices[i]; 572 573 INIT_LIST_HEAD(&idev->node); 574 } 575 576 shost = scsi_host_alloc(&isci_sht, sizeof(void *)); 577 if (!shost) 578 return NULL; 579 580 dev_info(&pdev->dev, "%sSCU controller %d: phy 3-0 cables: " 581 "{%s, %s, %s, %s}\n", 582 (is_cable_select_overridden() ? "* " : ""), ihost->id, 583 lookup_cable_names(decode_cable_selection(ihost, 3)), 584 lookup_cable_names(decode_cable_selection(ihost, 2)), 585 lookup_cable_names(decode_cable_selection(ihost, 1)), 586 lookup_cable_names(decode_cable_selection(ihost, 0))); 587 588 err = isci_host_init(ihost); 589 if (err) 590 goto err_shost; 591 592 SHOST_TO_SAS_HA(shost) = &ihost->sas_ha; 593 ihost->sas_ha.core.shost = shost; 594 shost->transportt = isci_transport_template; 595 596 shost->max_id = ~0; 597 shost->max_lun = ~0; 598 shost->max_cmd_len = MAX_COMMAND_SIZE; 599 600 err = scsi_add_host(shost, &pdev->dev); 601 if (err) 602 goto err_shost; 603 604 err = isci_register_sas_ha(ihost); 605 if (err) 606 goto err_shost_remove; 607 608 return ihost; 609 610 err_shost_remove: 611 scsi_remove_host(shost); 612 err_shost: 613 scsi_host_put(shost); 614 615 return NULL; 616} 617 618static int isci_pci_probe(struct pci_dev *pdev, const struct pci_device_id *id) 619{ 620 struct isci_pci_info *pci_info; 621 int err, i; 622 struct isci_host *isci_host; 623 const struct firmware *fw = NULL; 624 struct isci_orom *orom = NULL; 625 char *source = "(platform)"; 626 627 dev_info(&pdev->dev, "driver configured for rev: %d silicon\n", 628 pdev->revision); 629 630 pci_info = devm_kzalloc(&pdev->dev, sizeof(*pci_info), GFP_KERNEL); 631 if (!pci_info) 632 return -ENOMEM; 633 pci_set_drvdata(pdev, pci_info); 634 635 if (efi_enabled(EFI_RUNTIME_SERVICES)) 636 orom = isci_get_efi_var(pdev); 637 638 if (!orom) 639 orom = isci_request_oprom(pdev); 640 641 for (i = 0; orom && i < num_controllers(pdev); i++) { 642 if (sci_oem_parameters_validate(&orom->ctrl[i], 643 orom->hdr.version)) { 644 dev_warn(&pdev->dev, 645 "[%d]: invalid oem parameters detected, falling back to firmware\n", i); 646 orom = NULL; 647 break; 648 } 649 } 650 651 if (!orom) { 652 source = "(firmware)"; 653 orom = isci_request_firmware(pdev, fw); 654 if (!orom) { 655 /* TODO convert this to WARN_TAINT_ONCE once the 656 * orom/efi parameter support is widely available 657 */ 658 dev_warn(&pdev->dev, 659 "Loading user firmware failed, using default " 660 "values\n"); 661 dev_warn(&pdev->dev, 662 "Default OEM configuration being used: 4 " 663 "narrow ports, and default SAS Addresses\n"); 664 } 665 } 666 667 if (orom) 668 dev_info(&pdev->dev, 669 "OEM SAS parameters (version: %u.%u) loaded %s\n", 670 (orom->hdr.version & 0xf0) >> 4, 671 (orom->hdr.version & 0xf), source); 672 673 pci_info->orom = orom; 674 675 err = isci_pci_init(pdev); 676 if (err) 677 return err; 678 679 for (i = 0; i < num_controllers(pdev); i++) { 680 struct isci_host *h = isci_host_alloc(pdev, i); 681 682 if (!h) { 683 err = -ENOMEM; 684 goto err_host_alloc; 685 } 686 pci_info->hosts[i] = h; 687 688 /* turn on DIF support */ 689 scsi_host_set_prot(to_shost(h), 690 SHOST_DIF_TYPE1_PROTECTION | 691 SHOST_DIF_TYPE2_PROTECTION | 692 SHOST_DIF_TYPE3_PROTECTION); 693 scsi_host_set_guard(to_shost(h), SHOST_DIX_GUARD_CRC); 694 } 695 696 err = isci_setup_interrupts(pdev); 697 if (err) 698 goto err_host_alloc; 699 700 for_each_isci_host(i, isci_host, pdev) 701 scsi_scan_host(to_shost(isci_host)); 702 703 return 0; 704 705 err_host_alloc: 706 for_each_isci_host(i, isci_host, pdev) 707 isci_unregister(isci_host); 708 return err; 709} 710 711static void isci_pci_remove(struct pci_dev *pdev) 712{ 713 struct isci_host *ihost; 714 int i; 715 716 for_each_isci_host(i, ihost, pdev) { 717 wait_for_start(ihost); 718 isci_unregister(ihost); 719 isci_host_deinit(ihost); 720 } 721} 722 723#ifdef CONFIG_PM_SLEEP 724static int isci_suspend(struct device *dev) 725{ 726 struct pci_dev *pdev = to_pci_dev(dev); 727 struct isci_host *ihost; 728 int i; 729 730 for_each_isci_host(i, ihost, pdev) { 731 sas_suspend_ha(&ihost->sas_ha); 732 isci_host_deinit(ihost); 733 } 734 735 pci_save_state(pdev); 736 pci_disable_device(pdev); 737 pci_set_power_state(pdev, PCI_D3hot); 738 739 return 0; 740} 741 742static int isci_resume(struct device *dev) 743{ 744 struct pci_dev *pdev = to_pci_dev(dev); 745 struct isci_host *ihost; 746 int rc, i; 747 748 pci_set_power_state(pdev, PCI_D0); 749 pci_restore_state(pdev); 750 751 rc = pcim_enable_device(pdev); 752 if (rc) { 753 dev_err(&pdev->dev, 754 "enabling device failure after resume(%d)\n", rc); 755 return rc; 756 } 757 758 pci_set_master(pdev); 759 760 for_each_isci_host(i, ihost, pdev) { 761 sas_prep_resume_ha(&ihost->sas_ha); 762 763 isci_host_init(ihost); 764 isci_host_start(ihost->sas_ha.core.shost); 765 wait_for_start(ihost); 766 767 sas_resume_ha(&ihost->sas_ha); 768 } 769 770 return 0; 771} 772#endif 773 774static SIMPLE_DEV_PM_OPS(isci_pm_ops, isci_suspend, isci_resume); 775 776static struct pci_driver isci_pci_driver = { 777 .name = DRV_NAME, 778 .id_table = isci_id_table, 779 .probe = isci_pci_probe, 780 .remove = isci_pci_remove, 781 .driver.pm = &isci_pm_ops, 782}; 783 784static __init int isci_init(void) 785{ 786 int err; 787 788 pr_info("%s: Intel(R) C600 SAS Controller Driver - version %s\n", 789 DRV_NAME, DRV_VERSION); 790 791 isci_transport_template = sas_domain_attach_transport(&isci_transport_ops); 792 if (!isci_transport_template) 793 return -ENOMEM; 794 795 err = pci_register_driver(&isci_pci_driver); 796 if (err) 797 sas_release_transport(isci_transport_template); 798 799 return err; 800} 801 802static __exit void isci_exit(void) 803{ 804 pci_unregister_driver(&isci_pci_driver); 805 sas_release_transport(isci_transport_template); 806} 807 808MODULE_LICENSE("Dual BSD/GPL"); 809MODULE_FIRMWARE(ISCI_FW_NAME); 810module_init(isci_init); 811module_exit(isci_exit); 812