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 1 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 DEFINE_PCI_DEVICE_TABLE(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_scan_start, 160 .change_queue_depth = sas_change_queue_depth, 161 .change_queue_type = sas_change_queue_type, 162 .bios_param = sas_bios_param, 163 .can_queue = ISCI_CAN_QUEUE_VAL, 164 .cmd_per_lun = 1, 165 .this_id = -1, 166 .sg_tablesize = SG_ALL, 167 .max_sectors = SCSI_DEFAULT_MAX_SECTORS, 168 .use_clustering = ENABLE_CLUSTERING, 169 .target_destroy = sas_target_destroy, 170 .ioctl = sas_ioctl, 171 .shost_attrs = isci_host_attrs, 172 }; 173 174 static struct sas_domain_function_template isci_transport_ops = { 175 176 /* The class calls these to notify the LLDD of an event. */ 177 .lldd_port_formed = isci_port_formed, 178 .lldd_port_deformed = isci_port_deformed, 179 180 /* The class calls these when a device is found or gone. */ 181 .lldd_dev_found = isci_remote_device_found, 182 .lldd_dev_gone = isci_remote_device_gone, 183 184 .lldd_execute_task = isci_task_execute_task, 185 /* Task Management Functions. Must be called from process context. */ 186 .lldd_abort_task = isci_task_abort_task, 187 .lldd_abort_task_set = isci_task_abort_task_set, 188 .lldd_clear_aca = isci_task_clear_aca, 189 .lldd_clear_task_set = isci_task_clear_task_set, 190 .lldd_I_T_nexus_reset = isci_task_I_T_nexus_reset, 191 .lldd_lu_reset = isci_task_lu_reset, 192 .lldd_query_task = isci_task_query_task, 193 194 /* ata recovery called from ata-eh */ 195 .lldd_ata_check_ready = isci_ata_check_ready, 196 197 /* Port and Adapter management */ 198 .lldd_clear_nexus_port = isci_task_clear_nexus_port, 199 .lldd_clear_nexus_ha = isci_task_clear_nexus_ha, 200 201 /* Phy management */ 202 .lldd_control_phy = isci_phy_control, 203 204 /* GPIO support */ 205 .lldd_write_gpio = isci_gpio_write, 206 }; 207 208 209 /****************************************************************************** 210 * P R O T E C T E D M E T H O D S 211 ******************************************************************************/ 212 213 214 215 /** 216 * isci_register_sas_ha() - This method initializes various lldd 217 * specific members of the sas_ha struct and calls the libsas 218 * sas_register_ha() function. 219 * @isci_host: This parameter specifies the lldd specific wrapper for the 220 * libsas sas_ha struct. 221 * 222 * This method returns an error code indicating sucess or failure. The user 223 * should check for possible memory allocation error return otherwise, a zero 224 * indicates success. 225 */ 226 static int isci_register_sas_ha(struct isci_host *isci_host) 227 { 228 int i; 229 struct sas_ha_struct *sas_ha = &(isci_host->sas_ha); 230 struct asd_sas_phy **sas_phys; 231 struct asd_sas_port **sas_ports; 232 233 sas_phys = devm_kzalloc(&isci_host->pdev->dev, 234 SCI_MAX_PHYS * sizeof(void *), 235 GFP_KERNEL); 236 if (!sas_phys) 237 return -ENOMEM; 238 239 sas_ports = devm_kzalloc(&isci_host->pdev->dev, 240 SCI_MAX_PORTS * sizeof(void *), 241 GFP_KERNEL); 242 if (!sas_ports) 243 return -ENOMEM; 244 245 sas_ha->sas_ha_name = DRV_NAME; 246 sas_ha->lldd_module = THIS_MODULE; 247 sas_ha->sas_addr = &isci_host->phys[0].sas_addr[0]; 248 249 for (i = 0; i < SCI_MAX_PHYS; i++) { 250 sas_phys[i] = &isci_host->phys[i].sas_phy; 251 sas_ports[i] = &isci_host->sas_ports[i]; 252 } 253 254 sas_ha->sas_phy = sas_phys; 255 sas_ha->sas_port = sas_ports; 256 sas_ha->num_phys = SCI_MAX_PHYS; 257 258 sas_ha->lldd_queue_size = ISCI_CAN_QUEUE_VAL; 259 sas_ha->lldd_max_execute_num = 1; 260 sas_ha->strict_wide_ports = 1; 261 262 sas_register_ha(sas_ha); 263 264 return 0; 265 } 266 267 static void isci_unregister(struct isci_host *isci_host) 268 { 269 struct Scsi_Host *shost; 270 271 if (!isci_host) 272 return; 273 274 sas_unregister_ha(&isci_host->sas_ha); 275 276 shost = to_shost(isci_host); 277 sas_remove_host(shost); 278 scsi_remove_host(shost); 279 scsi_host_put(shost); 280 } 281 282 static int __devinit isci_pci_init(struct pci_dev *pdev) 283 { 284 int err, bar_num, bar_mask = 0; 285 void __iomem * const *iomap; 286 287 err = pcim_enable_device(pdev); 288 if (err) { 289 dev_err(&pdev->dev, 290 "failed enable PCI device %s!\n", 291 pci_name(pdev)); 292 return err; 293 } 294 295 for (bar_num = 0; bar_num < SCI_PCI_BAR_COUNT; bar_num++) 296 bar_mask |= 1 << (bar_num * 2); 297 298 err = pcim_iomap_regions(pdev, bar_mask, DRV_NAME); 299 if (err) 300 return err; 301 302 iomap = pcim_iomap_table(pdev); 303 if (!iomap) 304 return -ENOMEM; 305 306 pci_set_master(pdev); 307 308 err = pci_set_dma_mask(pdev, DMA_BIT_MASK(64)); 309 if (err) { 310 err = pci_set_dma_mask(pdev, DMA_BIT_MASK(32)); 311 if (err) 312 return err; 313 } 314 315 err = pci_set_consistent_dma_mask(pdev, DMA_BIT_MASK(64)); 316 if (err) { 317 err = pci_set_consistent_dma_mask(pdev, DMA_BIT_MASK(32)); 318 if (err) 319 return err; 320 } 321 322 return 0; 323 } 324 325 static int num_controllers(struct pci_dev *pdev) 326 { 327 /* bar size alone can tell us if we are running with a dual controller 328 * part, no need to trust revision ids that might be under broken firmware 329 * control 330 */ 331 resource_size_t scu_bar_size = pci_resource_len(pdev, SCI_SCU_BAR*2); 332 resource_size_t smu_bar_size = pci_resource_len(pdev, SCI_SMU_BAR*2); 333 334 if (scu_bar_size >= SCI_SCU_BAR_SIZE*SCI_MAX_CONTROLLERS && 335 smu_bar_size >= SCI_SMU_BAR_SIZE*SCI_MAX_CONTROLLERS) 336 return SCI_MAX_CONTROLLERS; 337 else 338 return 1; 339 } 340 341 static int isci_setup_interrupts(struct pci_dev *pdev) 342 { 343 int err, i, num_msix; 344 struct isci_host *ihost; 345 struct isci_pci_info *pci_info = to_pci_info(pdev); 346 347 /* 348 * Determine the number of vectors associated with this 349 * PCI function. 350 */ 351 num_msix = num_controllers(pdev) * SCI_NUM_MSI_X_INT; 352 353 for (i = 0; i < num_msix; i++) 354 pci_info->msix_entries[i].entry = i; 355 356 err = pci_enable_msix(pdev, pci_info->msix_entries, num_msix); 357 if (err) 358 goto intx; 359 360 for (i = 0; i < num_msix; i++) { 361 int id = i / SCI_NUM_MSI_X_INT; 362 struct msix_entry *msix = &pci_info->msix_entries[i]; 363 irq_handler_t isr; 364 365 ihost = pci_info->hosts[id]; 366 /* odd numbered vectors are error interrupts */ 367 if (i & 1) 368 isr = isci_error_isr; 369 else 370 isr = isci_msix_isr; 371 372 err = devm_request_irq(&pdev->dev, msix->vector, isr, 0, 373 DRV_NAME"-msix", ihost); 374 if (!err) 375 continue; 376 377 dev_info(&pdev->dev, "msix setup failed falling back to intx\n"); 378 while (i--) { 379 id = i / SCI_NUM_MSI_X_INT; 380 ihost = pci_info->hosts[id]; 381 msix = &pci_info->msix_entries[i]; 382 devm_free_irq(&pdev->dev, msix->vector, ihost); 383 } 384 pci_disable_msix(pdev); 385 goto intx; 386 } 387 return 0; 388 389 intx: 390 for_each_isci_host(i, ihost, pdev) { 391 err = devm_request_irq(&pdev->dev, pdev->irq, isci_intx_isr, 392 IRQF_SHARED, DRV_NAME"-intx", ihost); 393 if (err) 394 break; 395 } 396 return err; 397 } 398 399 static void isci_user_parameters_get(struct sci_user_parameters *u) 400 { 401 int i; 402 403 for (i = 0; i < SCI_MAX_PHYS; i++) { 404 struct sci_phy_user_params *u_phy = &u->phys[i]; 405 406 u_phy->max_speed_generation = phy_gen; 407 408 /* we are not exporting these for now */ 409 u_phy->align_insertion_frequency = 0x7f; 410 u_phy->in_connection_align_insertion_frequency = 0xff; 411 u_phy->notify_enable_spin_up_insertion_frequency = 0x33; 412 } 413 414 u->stp_inactivity_timeout = stp_inactive_to; 415 u->ssp_inactivity_timeout = ssp_inactive_to; 416 u->stp_max_occupancy_timeout = stp_max_occ_to; 417 u->ssp_max_occupancy_timeout = ssp_max_occ_to; 418 u->no_outbound_task_timeout = no_outbound_task_to; 419 u->max_concurr_spinup = max_concurr_spinup; 420 } 421 422 static enum sci_status sci_user_parameters_set(struct isci_host *ihost, 423 struct sci_user_parameters *sci_parms) 424 { 425 u16 index; 426 427 /* 428 * Validate the user parameters. If they are not legal, then 429 * return a failure. 430 */ 431 for (index = 0; index < SCI_MAX_PHYS; index++) { 432 struct sci_phy_user_params *u; 433 434 u = &sci_parms->phys[index]; 435 436 if (!((u->max_speed_generation <= SCIC_SDS_PARM_MAX_SPEED) && 437 (u->max_speed_generation > SCIC_SDS_PARM_NO_SPEED))) 438 return SCI_FAILURE_INVALID_PARAMETER_VALUE; 439 440 if (u->in_connection_align_insertion_frequency < 3) 441 return SCI_FAILURE_INVALID_PARAMETER_VALUE; 442 443 if ((u->in_connection_align_insertion_frequency < 3) || 444 (u->align_insertion_frequency == 0) || 445 (u->notify_enable_spin_up_insertion_frequency == 0)) 446 return SCI_FAILURE_INVALID_PARAMETER_VALUE; 447 } 448 449 if ((sci_parms->stp_inactivity_timeout == 0) || 450 (sci_parms->ssp_inactivity_timeout == 0) || 451 (sci_parms->stp_max_occupancy_timeout == 0) || 452 (sci_parms->ssp_max_occupancy_timeout == 0) || 453 (sci_parms->no_outbound_task_timeout == 0)) 454 return SCI_FAILURE_INVALID_PARAMETER_VALUE; 455 456 memcpy(&ihost->user_parameters, sci_parms, sizeof(*sci_parms)); 457 458 return SCI_SUCCESS; 459 } 460 461 static void sci_oem_defaults(struct isci_host *ihost) 462 { 463 /* these defaults are overridden by the platform / firmware */ 464 struct sci_user_parameters *user = &ihost->user_parameters; 465 struct sci_oem_params *oem = &ihost->oem_parameters; 466 int i; 467 468 /* Default to APC mode. */ 469 oem->controller.mode_type = SCIC_PORT_AUTOMATIC_CONFIGURATION_MODE; 470 471 /* Default to APC mode. */ 472 oem->controller.max_concurr_spin_up = 1; 473 474 /* Default to no SSC operation. */ 475 oem->controller.do_enable_ssc = false; 476 477 /* Default to short cables on all phys. */ 478 oem->controller.cable_selection_mask = 0; 479 480 /* Initialize all of the port parameter information to narrow ports. */ 481 for (i = 0; i < SCI_MAX_PORTS; i++) 482 oem->ports[i].phy_mask = 0; 483 484 /* Initialize all of the phy parameter information. */ 485 for (i = 0; i < SCI_MAX_PHYS; i++) { 486 /* Default to 3G (i.e. Gen 2). */ 487 user->phys[i].max_speed_generation = SCIC_SDS_PARM_GEN2_SPEED; 488 489 /* the frequencies cannot be 0 */ 490 user->phys[i].align_insertion_frequency = 0x7f; 491 user->phys[i].in_connection_align_insertion_frequency = 0xff; 492 user->phys[i].notify_enable_spin_up_insertion_frequency = 0x33; 493 494 /* Previous Vitesse based expanders had a arbitration issue that 495 * is worked around by having the upper 32-bits of SAS address 496 * with a value greater then the Vitesse company identifier. 497 * Hence, usage of 0x5FCFFFFF. 498 */ 499 oem->phys[i].sas_address.low = 0x1 + ihost->id; 500 oem->phys[i].sas_address.high = 0x5FCFFFFF; 501 } 502 503 user->stp_inactivity_timeout = 5; 504 user->ssp_inactivity_timeout = 5; 505 user->stp_max_occupancy_timeout = 5; 506 user->ssp_max_occupancy_timeout = 20; 507 user->no_outbound_task_timeout = 2; 508 } 509 510 static struct isci_host *isci_host_alloc(struct pci_dev *pdev, int id) 511 { 512 struct isci_orom *orom = to_pci_info(pdev)->orom; 513 struct sci_user_parameters sci_user_params; 514 u8 oem_version = ISCI_ROM_VER_1_0; 515 struct isci_host *ihost; 516 struct Scsi_Host *shost; 517 int err, i; 518 519 ihost = devm_kzalloc(&pdev->dev, sizeof(*ihost), GFP_KERNEL); 520 if (!ihost) 521 return NULL; 522 523 ihost->pdev = pdev; 524 ihost->id = id; 525 spin_lock_init(&ihost->scic_lock); 526 init_waitqueue_head(&ihost->eventq); 527 ihost->sas_ha.dev = &ihost->pdev->dev; 528 ihost->sas_ha.lldd_ha = ihost; 529 tasklet_init(&ihost->completion_tasklet, 530 isci_host_completion_routine, (unsigned long)ihost); 531 532 /* validate module parameters */ 533 /* TODO: kill struct sci_user_parameters and reference directly */ 534 sci_oem_defaults(ihost); 535 isci_user_parameters_get(&sci_user_params); 536 if (sci_user_parameters_set(ihost, &sci_user_params)) { 537 dev_warn(&pdev->dev, 538 "%s: sci_user_parameters_set failed\n", __func__); 539 return NULL; 540 } 541 542 /* sanity check platform (or 'firmware') oem parameters */ 543 if (orom) { 544 if (id < 0 || id >= SCI_MAX_CONTROLLERS || id > orom->hdr.num_elements) { 545 dev_warn(&pdev->dev, "parsing firmware oem parameters failed\n"); 546 return NULL; 547 } 548 ihost->oem_parameters = orom->ctrl[id]; 549 oem_version = orom->hdr.version; 550 } 551 552 /* validate oem parameters (platform, firmware, or built-in defaults) */ 553 if (sci_oem_parameters_validate(&ihost->oem_parameters, oem_version)) { 554 dev_warn(&pdev->dev, "oem parameter validation failed\n"); 555 return NULL; 556 } 557 558 for (i = 0; i < SCI_MAX_PORTS; i++) { 559 struct isci_port *iport = &ihost->ports[i]; 560 561 INIT_LIST_HEAD(&iport->remote_dev_list); 562 iport->isci_host = ihost; 563 } 564 565 for (i = 0; i < SCI_MAX_PHYS; i++) 566 isci_phy_init(&ihost->phys[i], ihost, i); 567 568 for (i = 0; i < SCI_MAX_REMOTE_DEVICES; i++) { 569 struct isci_remote_device *idev = &ihost->devices[i]; 570 571 INIT_LIST_HEAD(&idev->node); 572 } 573 574 shost = scsi_host_alloc(&isci_sht, sizeof(void *)); 575 if (!shost) 576 return NULL; 577 578 dev_info(&pdev->dev, "%sSCU controller %d: phy 3-0 cables: " 579 "{%s, %s, %s, %s}\n", 580 (is_cable_select_overridden() ? "* " : ""), ihost->id, 581 lookup_cable_names(decode_cable_selection(ihost, 3)), 582 lookup_cable_names(decode_cable_selection(ihost, 2)), 583 lookup_cable_names(decode_cable_selection(ihost, 1)), 584 lookup_cable_names(decode_cable_selection(ihost, 0))); 585 586 err = isci_host_init(ihost); 587 if (err) 588 goto err_shost; 589 590 SHOST_TO_SAS_HA(shost) = &ihost->sas_ha; 591 ihost->sas_ha.core.shost = shost; 592 shost->transportt = isci_transport_template; 593 594 shost->max_id = ~0; 595 shost->max_lun = ~0; 596 shost->max_cmd_len = MAX_COMMAND_SIZE; 597 598 err = scsi_add_host(shost, &pdev->dev); 599 if (err) 600 goto err_shost; 601 602 err = isci_register_sas_ha(ihost); 603 if (err) 604 goto err_shost_remove; 605 606 return ihost; 607 608 err_shost_remove: 609 scsi_remove_host(shost); 610 err_shost: 611 scsi_host_put(shost); 612 613 return NULL; 614 } 615 616 static int __devinit isci_pci_probe(struct pci_dev *pdev, const struct pci_device_id *id) 617 { 618 struct isci_pci_info *pci_info; 619 int err, i; 620 struct isci_host *isci_host; 621 const struct firmware *fw = NULL; 622 struct isci_orom *orom = NULL; 623 char *source = "(platform)"; 624 625 dev_info(&pdev->dev, "driver configured for rev: %d silicon\n", 626 pdev->revision); 627 628 pci_info = devm_kzalloc(&pdev->dev, sizeof(*pci_info), GFP_KERNEL); 629 if (!pci_info) 630 return -ENOMEM; 631 pci_set_drvdata(pdev, pci_info); 632 633 if (efi_enabled) 634 orom = isci_get_efi_var(pdev); 635 636 if (!orom) 637 orom = isci_request_oprom(pdev); 638 639 for (i = 0; orom && i < num_controllers(pdev); i++) { 640 if (sci_oem_parameters_validate(&orom->ctrl[i], 641 orom->hdr.version)) { 642 dev_warn(&pdev->dev, 643 "[%d]: invalid oem parameters detected, falling back to firmware\n", i); 644 devm_kfree(&pdev->dev, orom); 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 __devexit 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 static struct pci_driver isci_pci_driver = { 723 .name = DRV_NAME, 724 .id_table = isci_id_table, 725 .probe = isci_pci_probe, 726 .remove = __devexit_p(isci_pci_remove), 727 }; 728 729 static __init int isci_init(void) 730 { 731 int err; 732 733 pr_info("%s: Intel(R) C600 SAS Controller Driver - version %s\n", 734 DRV_NAME, DRV_VERSION); 735 736 isci_transport_template = sas_domain_attach_transport(&isci_transport_ops); 737 if (!isci_transport_template) 738 return -ENOMEM; 739 740 err = pci_register_driver(&isci_pci_driver); 741 if (err) 742 sas_release_transport(isci_transport_template); 743 744 return err; 745 } 746 747 static __exit void isci_exit(void) 748 { 749 pci_unregister_driver(&isci_pci_driver); 750 sas_release_transport(isci_transport_template); 751 } 752 753 MODULE_LICENSE("Dual BSD/GPL"); 754 MODULE_FIRMWARE(ISCI_FW_NAME); 755 module_init(isci_init); 756 module_exit(isci_exit); 757