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 struct device_attribute *isci_host_attrs[] = {
 146         &dev_attr_isci_id,
 147         NULL
 148 };
 149
 150 static struct scsi_host_template isci_sht = {
 151
 152         .module                         = THIS_MODULE,
 153         .name                           = DRV_NAME,
 154         .proc_name                      = DRV_NAME,
 155         .queuecommand                   = sas_queuecommand,
 156         .target_alloc                   = sas_target_alloc,
 157         .slave_configure                = sas_slave_configure,
 158         .scan_finished                  = isci_host_scan_finished,
 159         .scan_start                     = isci_host_start,
 160         .change_queue_depth             = sas_change_queue_depth,
 161         .bios_param                     = sas_bios_param,
 162         .can_queue                      = ISCI_CAN_QUEUE_VAL,
 163         .this_id                        = -1,
 164         .sg_tablesize                   = SG_ALL,
 165         .max_sectors                    = SCSI_DEFAULT_MAX_SECTORS,
 166         .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         .shost_attrs                    = isci_host_attrs,
 172         .track_queue_depth              = 1,
 173 };
 174
 175 static struct sas_domain_function_template isci_transport_ops  = {
 176
 177         /* The class calls these to notify the LLDD of an event. */
 178         .lldd_port_formed       = isci_port_formed,
 179         .lldd_port_deformed     = isci_port_deformed,
 180
 181         /* The class calls these when a device is found or gone. */
 182         .lldd_dev_found         = isci_remote_device_found,
 183         .lldd_dev_gone          = isci_remote_device_gone,
 184
 185         .lldd_execute_task      = isci_task_execute_task,
 186         /* Task Management Functions. Must be called from process context. */
 187         .lldd_abort_task        = isci_task_abort_task,
 188         .lldd_abort_task_set    = isci_task_abort_task_set,
 189         .lldd_clear_aca         = isci_task_clear_aca,
 190         .lldd_clear_task_set    = isci_task_clear_task_set,
 191         .lldd_I_T_nexus_reset   = isci_task_I_T_nexus_reset,
 192         .lldd_lu_reset          = isci_task_lu_reset,
 193         .lldd_query_task        = isci_task_query_task,
 194
 195         /* ata recovery called from ata-eh */
 196         .lldd_ata_check_ready   = isci_ata_check_ready,
 197
 198         /* Port and Adapter management */
 199         .lldd_clear_nexus_port  = isci_task_clear_nexus_port,
 200         .lldd_clear_nexus_ha    = isci_task_clear_nexus_ha,
 201
 202         /* Phy management */
 203         .lldd_control_phy       = isci_phy_control,
 204
 205         /* GPIO support */
 206         .lldd_write_gpio        = isci_gpio_write,
 207 };
 208
 209
 210 /******************************************************************************
 211 * P R O T E C T E D  M E T H O D S
 212 ******************************************************************************/
 213
 214
 215
 216 /**
 217  * isci_register_sas_ha() - This method initializes various lldd
 218  *    specific members of the sas_ha struct and calls the libsas
 219  *    sas_register_ha() function.
 220  * @isci_host: This parameter specifies the lldd specific wrapper for the
 221  *    libsas sas_ha struct.
 222  *
 223  * This method returns an error code indicating success or failure. The user
 224  * should check for possible memory allocation error return otherwise, a zero
 225  * indicates success.
 226  */
 227 static int isci_register_sas_ha(struct isci_host *isci_host)
 228 {
 229         int i;
 230         struct sas_ha_struct *sas_ha = &(isci_host->sas_ha);
 231         struct asd_sas_phy **sas_phys;
 232         struct asd_sas_port **sas_ports;
 233
 234         sas_phys = devm_kcalloc(&isci_host->pdev->dev,
 235                                 SCI_MAX_PHYS, sizeof(void *),
 236                                 GFP_KERNEL);
 237         if (!sas_phys)
 238                 return -ENOMEM;
 239
 240         sas_ports = devm_kcalloc(&isci_host->pdev->dev,
 241                                  SCI_MAX_PORTS, sizeof(void *),
 242                                  GFP_KERNEL);
 243         if (!sas_ports)
 244                 return -ENOMEM;
 245
 246         sas_ha->sas_ha_name = DRV_NAME;
 247         sas_ha->lldd_module = THIS_MODULE;
 248         sas_ha->sas_addr    = &isci_host->phys[0].sas_addr[0];
 249
 250         for (i = 0; i < SCI_MAX_PHYS; i++) {
 251                 sas_phys[i] = &isci_host->phys[i].sas_phy;
 252                 sas_ports[i] = &isci_host->sas_ports[i];
 253         }
 254
 255         sas_ha->sas_phy  = sas_phys;
 256         sas_ha->sas_port = sas_ports;
 257         sas_ha->num_phys = SCI_MAX_PHYS;
 258
 259         sas_ha->strict_wide_ports = 1;
 260
 261         sas_register_ha(sas_ha);
 262
 263         return 0;
 264 }
 265
 266 static void isci_unregister(struct isci_host *isci_host)
 267 {
 268         struct Scsi_Host *shost;
 269
 270         if (!isci_host)
 271                 return;
 272
 273         shost = to_shost(isci_host);
 274         sas_unregister_ha(&isci_host->sas_ha);
 275
 276         sas_remove_host(shost);
 277         scsi_host_put(shost);
 278 }
 279
 280 static int isci_pci_init(struct pci_dev *pdev)
 281 {
 282         int err, bar_num, bar_mask = 0;
 283         void __iomem * const *iomap;
 284
 285         err = pcim_enable_device(pdev);
 286         if (err) {
 287                 dev_err(&pdev->dev,
 288                         "failed enable PCI device %s!\n",
 289                         pci_name(pdev));
 290                 return err;
 291         }
 292
 293         for (bar_num = 0; bar_num < SCI_PCI_BAR_COUNT; bar_num++)
 294                 bar_mask |= 1 << (bar_num * 2);
 295
 296         err = pcim_iomap_regions(pdev, bar_mask, DRV_NAME);
 297         if (err)
 298                 return err;
 299
 300         iomap = pcim_iomap_table(pdev);
 301         if (!iomap)
 302                 return -ENOMEM;
 303
 304         pci_set_master(pdev);
 305
 306         err = dma_set_mask_and_coherent(&pdev->dev, DMA_BIT_MASK(64));
 307         if (err)
 308                 err = dma_set_mask_and_coherent(&pdev->dev, DMA_BIT_MASK(32));
 309         return err;
 310 }
 311
 312 static int num_controllers(struct pci_dev *pdev)
 313 {
 314         /* bar size alone can tell us if we are running with a dual controller
 315          * part, no need to trust revision ids that might be under broken firmware
 316          * control
 317          */
 318         resource_size_t scu_bar_size = pci_resource_len(pdev, SCI_SCU_BAR*2);
 319         resource_size_t smu_bar_size = pci_resource_len(pdev, SCI_SMU_BAR*2);
 320
 321         if (scu_bar_size >= SCI_SCU_BAR_SIZE*SCI_MAX_CONTROLLERS &&
 322             smu_bar_size >= SCI_SMU_BAR_SIZE*SCI_MAX_CONTROLLERS)
 323                 return SCI_MAX_CONTROLLERS;
 324         else
 325                 return 1;
 326 }
 327
 328 static int isci_setup_interrupts(struct pci_dev *pdev)
 329 {
 330         int err, i, num_msix;
 331         struct isci_host *ihost;
 332         struct isci_pci_info *pci_info = to_pci_info(pdev);
 333
 334         /*
 335          *  Determine the number of vectors associated with this
 336          *  PCI function.
 337          */
 338         num_msix = num_controllers(pdev) * SCI_NUM_MSI_X_INT;
 339
 340         err = pci_alloc_irq_vectors(pdev, num_msix, num_msix, PCI_IRQ_MSIX);
 341         if (err < 0)
 342                 goto intx;
 343
 344         for (i = 0; i < num_msix; i++) {
 345                 int id = i / SCI_NUM_MSI_X_INT;
 346                 irq_handler_t isr;
 347
 348                 ihost = pci_info->hosts[id];
 349                 /* odd numbered vectors are error interrupts */
 350                 if (i & 1)
 351                         isr = isci_error_isr;
 352                 else
 353                         isr = isci_msix_isr;
 354
 355                 err = devm_request_irq(&pdev->dev, pci_irq_vector(pdev, i),
 356                                 isr, 0, DRV_NAME"-msix", ihost);
 357                 if (!err)
 358                         continue;
 359
 360                 dev_info(&pdev->dev, "msix setup failed falling back to intx\n");
 361                 while (i--) {
 362                         id = i / SCI_NUM_MSI_X_INT;
 363                         ihost = pci_info->hosts[id];
 364                         devm_free_irq(&pdev->dev, pci_irq_vector(pdev, i),
 365                                         ihost);
 366                 }
 367                 pci_free_irq_vectors(pdev);
 368                 goto intx;
 369         }
 370         return 0;
 371
 372  intx:
 373         for_each_isci_host(i, ihost, pdev) {
 374                 err = devm_request_irq(&pdev->dev, pci_irq_vector(pdev, 0),
 375                                 isci_intx_isr, IRQF_SHARED, DRV_NAME"-intx",
 376                                 ihost);
 377                 if (err)
 378                         break;
 379         }
 380         return err;
 381 }
 382
 383 static void isci_user_parameters_get(struct sci_user_parameters *u)
 384 {
 385         int i;
 386
 387         for (i = 0; i < SCI_MAX_PHYS; i++) {
 388                 struct sci_phy_user_params *u_phy = &u->phys[i];
 389
 390                 u_phy->max_speed_generation = phy_gen;
 391
 392                 /* we are not exporting these for now */
 393                 u_phy->align_insertion_frequency = 0x7f;
 394                 u_phy->in_connection_align_insertion_frequency = 0xff;
 395                 u_phy->notify_enable_spin_up_insertion_frequency = 0x33;
 396         }
 397
 398         u->stp_inactivity_timeout = stp_inactive_to;
 399         u->ssp_inactivity_timeout = ssp_inactive_to;
 400         u->stp_max_occupancy_timeout = stp_max_occ_to;
 401         u->ssp_max_occupancy_timeout = ssp_max_occ_to;
 402         u->no_outbound_task_timeout = no_outbound_task_to;
 403         u->max_concurr_spinup = max_concurr_spinup;
 404 }
 405
 406 static enum sci_status sci_user_parameters_set(struct isci_host *ihost,
 407                                                struct sci_user_parameters *sci_parms)
 408 {
 409         u16 index;
 410
 411         /*
 412          * Validate the user parameters.  If they are not legal, then
 413          * return a failure.
 414          */
 415         for (index = 0; index < SCI_MAX_PHYS; index++) {
 416                 struct sci_phy_user_params *u;
 417
 418                 u = &sci_parms->phys[index];
 419
 420                 if (!((u->max_speed_generation <= SCIC_SDS_PARM_MAX_SPEED) &&
 421                       (u->max_speed_generation > SCIC_SDS_PARM_NO_SPEED)))
 422                         return SCI_FAILURE_INVALID_PARAMETER_VALUE;
 423
 424                 if ((u->in_connection_align_insertion_frequency < 3) ||
 425                     (u->align_insertion_frequency == 0) ||
 426                     (u->notify_enable_spin_up_insertion_frequency == 0))
 427                         return SCI_FAILURE_INVALID_PARAMETER_VALUE;
 428         }
 429
 430         if ((sci_parms->stp_inactivity_timeout == 0) ||
 431             (sci_parms->ssp_inactivity_timeout == 0) ||
 432             (sci_parms->stp_max_occupancy_timeout == 0) ||
 433             (sci_parms->ssp_max_occupancy_timeout == 0) ||
 434             (sci_parms->no_outbound_task_timeout == 0))
 435                 return SCI_FAILURE_INVALID_PARAMETER_VALUE;
 436
 437         memcpy(&ihost->user_parameters, sci_parms, sizeof(*sci_parms));
 438
 439         return SCI_SUCCESS;
 440 }
 441
 442 static void sci_oem_defaults(struct isci_host *ihost)
 443 {
 444         /* these defaults are overridden by the platform / firmware */
 445         struct sci_user_parameters *user = &ihost->user_parameters;
 446         struct sci_oem_params *oem = &ihost->oem_parameters;
 447         int i;
 448
 449         /* Default to APC mode. */
 450         oem->controller.mode_type = SCIC_PORT_AUTOMATIC_CONFIGURATION_MODE;
 451
 452         /* Default to APC mode. */
 453         oem->controller.max_concurr_spin_up = 1;
 454
 455         /* Default to no SSC operation. */
 456         oem->controller.do_enable_ssc = false;
 457
 458         /* Default to short cables on all phys. */
 459         oem->controller.cable_selection_mask = 0;
 460
 461         /* Initialize all of the port parameter information to narrow ports. */
 462         for (i = 0; i < SCI_MAX_PORTS; i++)
 463                 oem->ports[i].phy_mask = 0;
 464
 465         /* Initialize all of the phy parameter information. */
 466         for (i = 0; i < SCI_MAX_PHYS; i++) {
 467                 /* Default to 3G (i.e. Gen 2). */
 468                 user->phys[i].max_speed_generation = SCIC_SDS_PARM_GEN2_SPEED;
 469
 470                 /* the frequencies cannot be 0 */
 471                 user->phys[i].align_insertion_frequency = 0x7f;
 472                 user->phys[i].in_connection_align_insertion_frequency = 0xff;
 473                 user->phys[i].notify_enable_spin_up_insertion_frequency = 0x33;
 474
 475                 /* Previous Vitesse based expanders had a arbitration issue that
 476                  * is worked around by having the upper 32-bits of SAS address
 477                  * with a value greater then the Vitesse company identifier.
 478                  * Hence, usage of 0x5FCFFFFF.
 479                  */
 480                 oem->phys[i].sas_address.low = 0x1 + ihost->id;
 481                 oem->phys[i].sas_address.high = 0x5FCFFFFF;
 482         }
 483
 484         user->stp_inactivity_timeout = 5;
 485         user->ssp_inactivity_timeout = 5;
 486         user->stp_max_occupancy_timeout = 5;
 487         user->ssp_max_occupancy_timeout = 20;
 488         user->no_outbound_task_timeout = 2;
 489 }
 490
 491 static struct isci_host *isci_host_alloc(struct pci_dev *pdev, int id)
 492 {
 493         struct isci_orom *orom = to_pci_info(pdev)->orom;
 494         struct sci_user_parameters sci_user_params;
 495         u8 oem_version = ISCI_ROM_VER_1_0;
 496         struct isci_host *ihost;
 497         struct Scsi_Host *shost;
 498         int err, i;
 499
 500         ihost = devm_kzalloc(&pdev->dev, sizeof(*ihost), GFP_KERNEL);
 501         if (!ihost)
 502                 return NULL;
 503
 504         ihost->pdev = pdev;
 505         ihost->id = id;
 506         spin_lock_init(&ihost->scic_lock);
 507         init_waitqueue_head(&ihost->eventq);
 508         ihost->sas_ha.dev = &ihost->pdev->dev;
 509         ihost->sas_ha.lldd_ha = ihost;
 510         tasklet_init(&ihost->completion_tasklet,
 511                      isci_host_completion_routine, (unsigned long)ihost);
 512
 513         /* validate module parameters */
 514         /* TODO: kill struct sci_user_parameters and reference directly */
 515         sci_oem_defaults(ihost);
 516         isci_user_parameters_get(&sci_user_params);
 517         if (sci_user_parameters_set(ihost, &sci_user_params)) {
 518                 dev_warn(&pdev->dev,
 519                          "%s: sci_user_parameters_set failed\n", __func__);
 520                 return NULL;
 521         }
 522
 523         /* sanity check platform (or 'firmware') oem parameters */
 524         if (orom) {
 525                 if (id < 0 || id >= SCI_MAX_CONTROLLERS || id > orom->hdr.num_elements) {
 526                         dev_warn(&pdev->dev, "parsing firmware oem parameters failed\n");
 527                         return NULL;
 528                 }
 529                 ihost->oem_parameters = orom->ctrl[id];
 530                 oem_version = orom->hdr.version;
 531         }
 532
 533         /* validate oem parameters (platform, firmware, or built-in defaults) */
 534         if (sci_oem_parameters_validate(&ihost->oem_parameters, oem_version)) {
 535                 dev_warn(&pdev->dev, "oem parameter validation failed\n");
 536                 return NULL;
 537         }
 538
 539         for (i = 0; i < SCI_MAX_PORTS; i++) {
 540                 struct isci_port *iport = &ihost->ports[i];
 541
 542                 INIT_LIST_HEAD(&iport->remote_dev_list);
 543                 iport->isci_host = ihost;
 544         }
 545
 546         for (i = 0; i < SCI_MAX_PHYS; i++)
 547                 isci_phy_init(&ihost->phys[i], ihost, i);
 548
 549         for (i = 0; i < SCI_MAX_REMOTE_DEVICES; i++) {
 550                 struct isci_remote_device *idev = &ihost->devices[i];
 551
 552                 INIT_LIST_HEAD(&idev->node);
 553         }
 554
 555         shost = scsi_host_alloc(&isci_sht, sizeof(void *));
 556         if (!shost)
 557                 return NULL;
 558
 559         dev_info(&pdev->dev, "%sSCU controller %d: phy 3-0 cables: "
 560                  "{%s, %s, %s, %s}\n",
 561                  (is_cable_select_overridden() ? "* " : ""), ihost->id,
 562                  lookup_cable_names(decode_cable_selection(ihost, 3)),
 563                  lookup_cable_names(decode_cable_selection(ihost, 2)),
 564                  lookup_cable_names(decode_cable_selection(ihost, 1)),
 565                  lookup_cable_names(decode_cable_selection(ihost, 0)));
 566
 567         err = isci_host_init(ihost);
 568         if (err)
 569                 goto err_shost;
 570
 571         SHOST_TO_SAS_HA(shost) = &ihost->sas_ha;
 572         ihost->sas_ha.core.shost = shost;
 573         shost->transportt = isci_transport_template;
 574
 575         shost->max_id = ~0;
 576         shost->max_lun = ~0;
 577         shost->max_cmd_len = MAX_COMMAND_SIZE;
 578
 579         /* turn on DIF support */
 580         scsi_host_set_prot(shost,
 581                            SHOST_DIF_TYPE1_PROTECTION |
 582                            SHOST_DIF_TYPE2_PROTECTION |
 583                            SHOST_DIF_TYPE3_PROTECTION);
 584         scsi_host_set_guard(shost, SHOST_DIX_GUARD_CRC);
 585
 586         err = scsi_add_host(shost, &pdev->dev);
 587         if (err)
 588                 goto err_shost;
 589
 590         err = isci_register_sas_ha(ihost);
 591         if (err)
 592                 goto err_shost_remove;
 593
 594         return ihost;
 595
 596  err_shost_remove:
 597         scsi_remove_host(shost);
 598  err_shost:
 599         scsi_host_put(shost);
 600
 601         return NULL;
 602 }
 603
 604 static int isci_pci_probe(struct pci_dev *pdev, const struct pci_device_id *id)
 605 {
 606         struct isci_pci_info *pci_info;
 607         int err, i;
 608         struct isci_host *isci_host;
 609         const struct firmware *fw = NULL;
 610         struct isci_orom *orom = NULL;
 611         char *source = "(platform)";
 612
 613         dev_info(&pdev->dev, "driver configured for rev: %d silicon\n",
 614                  pdev->revision);
 615
 616         pci_info = devm_kzalloc(&pdev->dev, sizeof(*pci_info), GFP_KERNEL);
 617         if (!pci_info)
 618                 return -ENOMEM;
 619         pci_set_drvdata(pdev, pci_info);
 620
 621         if (efi_enabled(EFI_RUNTIME_SERVICES))
 622                 orom = isci_get_efi_var(pdev);
 623
 624         if (!orom)
 625                 orom = isci_request_oprom(pdev);
 626
 627         for (i = 0; orom && i < num_controllers(pdev); i++) {
 628                 if (sci_oem_parameters_validate(&orom->ctrl[i],
 629                                                 orom->hdr.version)) {
 630                         dev_warn(&pdev->dev,
 631                                  "[%d]: invalid oem parameters detected, falling back to firmware\n", i);
 632                         orom = NULL;
 633                         break;
 634                 }
 635         }
 636
 637         if (!orom) {
 638                 source = "(firmware)";
 639                 orom = isci_request_firmware(pdev, fw);
 640                 if (!orom) {
 641                         /* TODO convert this to WARN_TAINT_ONCE once the
 642                          * orom/efi parameter support is widely available
 643                          */
 644                         dev_warn(&pdev->dev,
 645                                  "Loading user firmware failed, using default "
 646                                  "values\n");
 647                         dev_warn(&pdev->dev,
 648                                  "Default OEM configuration being used: 4 "
 649                                  "narrow ports, and default SAS Addresses\n");
 650                 }
 651         }
 652
 653         if (orom)
 654                 dev_info(&pdev->dev,
 655                          "OEM SAS parameters (version: %u.%u) loaded %s\n",
 656                          (orom->hdr.version & 0xf0) >> 4,
 657                          (orom->hdr.version & 0xf), source);
 658
 659         pci_info->orom = orom;
 660
 661         err = isci_pci_init(pdev);
 662         if (err)
 663                 return err;
 664
 665         for (i = 0; i < num_controllers(pdev); i++) {
 666                 struct isci_host *h = isci_host_alloc(pdev, i);
 667
 668                 if (!h) {
 669                         err = -ENOMEM;
 670                         goto err_host_alloc;
 671                 }
 672                 pci_info->hosts[i] = h;
 673         }
 674
 675         err = isci_setup_interrupts(pdev);
 676         if (err)
 677                 goto err_host_alloc;
 678
 679         for_each_isci_host(i, isci_host, pdev)
 680                 scsi_scan_host(to_shost(isci_host));
 681
 682         return 0;
 683
 684  err_host_alloc:
 685         for_each_isci_host(i, isci_host, pdev)
 686                 isci_unregister(isci_host);
 687         return err;
 688 }
 689
 690 static void isci_pci_remove(struct pci_dev *pdev)
 691 {
 692         struct isci_host *ihost;
 693         int i;
 694
 695         for_each_isci_host(i, ihost, pdev) {
 696                 wait_for_start(ihost);
 697                 isci_unregister(ihost);
 698                 isci_host_deinit(ihost);
 699         }
 700 }
 701
 702 #ifdef CONFIG_PM_SLEEP
 703 static int isci_suspend(struct device *dev)
 704 {
 705         struct pci_dev *pdev = to_pci_dev(dev);
 706         struct isci_host *ihost;
 707         int i;
 708
 709         for_each_isci_host(i, ihost, pdev) {
 710                 sas_suspend_ha(&ihost->sas_ha);
 711                 isci_host_deinit(ihost);
 712         }
 713
 714         pci_save_state(pdev);
 715         pci_disable_device(pdev);
 716         pci_set_power_state(pdev, PCI_D3hot);
 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 rc, i;
 726
 727         pci_set_power_state(pdev, PCI_D0);
 728         pci_restore_state(pdev);
 729
 730         rc = pcim_enable_device(pdev);
 731         if (rc) {
 732                 dev_err(&pdev->dev,
 733                         "enabling device failure after resume(%d)\n", rc);
 734                 return rc;
 735         }
 736
 737         pci_set_master(pdev);
 738
 739         for_each_isci_host(i, ihost, pdev) {
 740                 sas_prep_resume_ha(&ihost->sas_ha);
 741
 742                 isci_host_init(ihost);
 743                 isci_host_start(ihost->sas_ha.core.shost);
 744                 wait_for_start(ihost);
 745
 746                 sas_resume_ha(&ihost->sas_ha);
 747         }
 748
 749         return 0;
 750 }
 751 #endif
 752
 753 static SIMPLE_DEV_PM_OPS(isci_pm_ops, isci_suspend, isci_resume);
 754
 755 static struct pci_driver isci_pci_driver = {
 756         .name           = DRV_NAME,
 757         .id_table       = isci_id_table,
 758         .probe          = isci_pci_probe,
 759         .remove         = isci_pci_remove,
 760         .driver.pm      = &isci_pm_ops,
 761 };
 762
 763 static __init int isci_init(void)
 764 {
 765         int err;
 766
 767         pr_info("%s: Intel(R) C600 SAS Controller Driver - version %s\n",
 768                 DRV_NAME, DRV_VERSION);
 769
 770         isci_transport_template = sas_domain_attach_transport(&isci_transport_ops);
 771         if (!isci_transport_template)
 772                 return -ENOMEM;
 773
 774         err = pci_register_driver(&isci_pci_driver);
 775         if (err)
 776                 sas_release_transport(isci_transport_template);
 777
 778         return err;
 779 }
 780
 781 static __exit void isci_exit(void)
 782 {
 783         pci_unregister_driver(&isci_pci_driver);
 784         sas_release_transport(isci_transport_template);
 785 }
 786
 787 MODULE_LICENSE("Dual BSD/GPL");
 788 MODULE_FIRMWARE(ISCI_FW_NAME);
 789 module_init(isci_init);
 790 module_exit(isci_exit);