drivers/scsi/isci/init.c

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