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 #ifdef CONFIG_COMPAT
 172         .compat_ioctl                   = sas_ioctl,
 173 #endif
 174         .shost_attrs                    = isci_host_attrs,
 175         .track_queue_depth              = 1,
 176 };
 177
 178 static 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  */
 230 static int isci_register_sas_ha(struct isci_host *isci_host)
 231 {
 232         int i;
 233         struct sas_ha_struct *sas_ha = &(isci_host->sas_ha);
 234         struct asd_sas_phy **sas_phys;
 235         struct asd_sas_port **sas_ports;
 236
 237         sas_phys = devm_kcalloc(&isci_host->pdev->dev,
 238                                 SCI_MAX_PHYS, sizeof(void *),
 239                                 GFP_KERNEL);
 240         if (!sas_phys)
 241                 return -ENOMEM;
 242
 243         sas_ports = devm_kcalloc(&isci_host->pdev->dev,
 244                                  SCI_MAX_PORTS, sizeof(void *),
 245                                  GFP_KERNEL);
 246         if (!sas_ports)
 247                 return -ENOMEM;
 248
 249         sas_ha->sas_ha_name = DRV_NAME;
 250         sas_ha->lldd_module = THIS_MODULE;
 251         sas_ha->sas_addr    = &isci_host->phys[0].sas_addr[0];
 252
 253         for (i = 0; i < SCI_MAX_PHYS; i++) {
 254                 sas_phys[i] = &isci_host->phys[i].sas_phy;
 255                 sas_ports[i] = &isci_host->sas_ports[i];
 256         }
 257
 258         sas_ha->sas_phy  = sas_phys;
 259         sas_ha->sas_port = sas_ports;
 260         sas_ha->num_phys = SCI_MAX_PHYS;
 261
 262         sas_ha->strict_wide_ports = 1;
 263
 264         sas_register_ha(sas_ha);
 265
 266         return 0;
 267 }
 268
 269 static void isci_unregister(struct isci_host *isci_host)
 270 {
 271         struct Scsi_Host *shost;
 272
 273         if (!isci_host)
 274                 return;
 275
 276         shost = to_shost(isci_host);
 277         sas_unregister_ha(&isci_host->sas_ha);
 278
 279         sas_remove_host(shost);
 280         scsi_host_put(shost);
 281 }
 282
 283 static int isci_pci_init(struct pci_dev *pdev)
 284 {
 285         int err, bar_num, bar_mask = 0;
 286         void __iomem * const *iomap;
 287
 288         err = pcim_enable_device(pdev);
 289         if (err) {
 290                 dev_err(&pdev->dev,
 291                         "failed enable PCI device %s!\n",
 292                         pci_name(pdev));
 293                 return err;
 294         }
 295
 296         for (bar_num = 0; bar_num < SCI_PCI_BAR_COUNT; bar_num++)
 297                 bar_mask |= 1 << (bar_num * 2);
 298
 299         err = pcim_iomap_regions(pdev, bar_mask, DRV_NAME);
 300         if (err)
 301                 return err;
 302
 303         iomap = pcim_iomap_table(pdev);
 304         if (!iomap)
 305                 return -ENOMEM;
 306
 307         pci_set_master(pdev);
 308
 309         err = dma_set_mask_and_coherent(&pdev->dev, DMA_BIT_MASK(64));
 310         if (err)
 311                 err = dma_set_mask_and_coherent(&pdev->dev, DMA_BIT_MASK(32));
 312         return err;
 313 }
 314
 315 static int num_controllers(struct pci_dev *pdev)
 316 {
 317         /* bar size alone can tell us if we are running with a dual controller
 318          * part, no need to trust revision ids that might be under broken firmware
 319          * control
 320          */
 321         resource_size_t scu_bar_size = pci_resource_len(pdev, SCI_SCU_BAR*2);
 322         resource_size_t smu_bar_size = pci_resource_len(pdev, SCI_SMU_BAR*2);
 323
 324         if (scu_bar_size >= SCI_SCU_BAR_SIZE*SCI_MAX_CONTROLLERS &&
 325             smu_bar_size >= SCI_SMU_BAR_SIZE*SCI_MAX_CONTROLLERS)
 326                 return SCI_MAX_CONTROLLERS;
 327         else
 328                 return 1;
 329 }
 330
 331 static int isci_setup_interrupts(struct pci_dev *pdev)
 332 {
 333         int err, i, num_msix;
 334         struct isci_host *ihost;
 335         struct isci_pci_info *pci_info = to_pci_info(pdev);
 336
 337         /*
 338          *  Determine the number of vectors associated with this
 339          *  PCI function.
 340          */
 341         num_msix = num_controllers(pdev) * SCI_NUM_MSI_X_INT;
 342
 343         err = pci_alloc_irq_vectors(pdev, num_msix, num_msix, PCI_IRQ_MSIX);
 344         if (err < 0)
 345                 goto intx;
 346
 347         for (i = 0; i < num_msix; i++) {
 348                 int id = i / SCI_NUM_MSI_X_INT;
 349                 irq_handler_t isr;
 350
 351                 ihost = pci_info->hosts[id];
 352                 /* odd numbered vectors are error interrupts */
 353                 if (i & 1)
 354                         isr = isci_error_isr;
 355                 else
 356                         isr = isci_msix_isr;
 357
 358                 err = devm_request_irq(&pdev->dev, pci_irq_vector(pdev, i),
 359                                 isr, 0, DRV_NAME"-msix", ihost);
 360                 if (!err)
 361                         continue;
 362
 363                 dev_info(&pdev->dev, "msix setup failed falling back to intx\n");
 364                 while (i--) {
 365                         id = i / SCI_NUM_MSI_X_INT;
 366                         ihost = pci_info->hosts[id];
 367                         devm_free_irq(&pdev->dev, pci_irq_vector(pdev, i),
 368                                         ihost);
 369                 }
 370                 pci_free_irq_vectors(pdev);
 371                 goto intx;
 372         }
 373         return 0;
 374
 375  intx:
 376         for_each_isci_host(i, ihost, pdev) {
 377                 err = devm_request_irq(&pdev->dev, pci_irq_vector(pdev, 0),
 378                                 isci_intx_isr, IRQF_SHARED, DRV_NAME"-intx",
 379                                 ihost);
 380                 if (err)
 381                         break;
 382         }
 383         return err;
 384 }
 385
 386 static void isci_user_parameters_get(struct sci_user_parameters *u)
 387 {
 388         int i;
 389
 390         for (i = 0; i < SCI_MAX_PHYS; i++) {
 391                 struct sci_phy_user_params *u_phy = &u->phys[i];
 392
 393                 u_phy->max_speed_generation = phy_gen;
 394
 395                 /* we are not exporting these for now */
 396                 u_phy->align_insertion_frequency = 0x7f;
 397                 u_phy->in_connection_align_insertion_frequency = 0xff;
 398                 u_phy->notify_enable_spin_up_insertion_frequency = 0x33;
 399         }
 400
 401         u->stp_inactivity_timeout = stp_inactive_to;
 402         u->ssp_inactivity_timeout = ssp_inactive_to;
 403         u->stp_max_occupancy_timeout = stp_max_occ_to;
 404         u->ssp_max_occupancy_timeout = ssp_max_occ_to;
 405         u->no_outbound_task_timeout = no_outbound_task_to;
 406         u->max_concurr_spinup = max_concurr_spinup;
 407 }
 408
 409 static enum sci_status sci_user_parameters_set(struct isci_host *ihost,
 410                                                struct sci_user_parameters *sci_parms)
 411 {
 412         u16 index;
 413
 414         /*
 415          * Validate the user parameters.  If they are not legal, then
 416          * return a failure.
 417          */
 418         for (index = 0; index < SCI_MAX_PHYS; index++) {
 419                 struct sci_phy_user_params *u;
 420
 421                 u = &sci_parms->phys[index];
 422
 423                 if (!((u->max_speed_generation <= SCIC_SDS_PARM_MAX_SPEED) &&
 424                       (u->max_speed_generation > SCIC_SDS_PARM_NO_SPEED)))
 425                         return SCI_FAILURE_INVALID_PARAMETER_VALUE;
 426
 427                 if ((u->in_connection_align_insertion_frequency < 3) ||
 428                     (u->align_insertion_frequency == 0) ||
 429                     (u->notify_enable_spin_up_insertion_frequency == 0))
 430                         return SCI_FAILURE_INVALID_PARAMETER_VALUE;
 431         }
 432
 433         if ((sci_parms->stp_inactivity_timeout == 0) ||
 434             (sci_parms->ssp_inactivity_timeout == 0) ||
 435             (sci_parms->stp_max_occupancy_timeout == 0) ||
 436             (sci_parms->ssp_max_occupancy_timeout == 0) ||
 437             (sci_parms->no_outbound_task_timeout == 0))
 438                 return SCI_FAILURE_INVALID_PARAMETER_VALUE;
 439
 440         memcpy(&ihost->user_parameters, sci_parms, sizeof(*sci_parms));
 441
 442         return SCI_SUCCESS;
 443 }
 444
 445 static void sci_oem_defaults(struct isci_host *ihost)
 446 {
 447         /* these defaults are overridden by the platform / firmware */
 448         struct sci_user_parameters *user = &ihost->user_parameters;
 449         struct sci_oem_params *oem = &ihost->oem_parameters;
 450         int i;
 451
 452         /* Default to APC mode. */
 453         oem->controller.mode_type = SCIC_PORT_AUTOMATIC_CONFIGURATION_MODE;
 454
 455         /* Default to APC mode. */
 456         oem->controller.max_concurr_spin_up = 1;
 457
 458         /* Default to no SSC operation. */
 459         oem->controller.do_enable_ssc = false;
 460
 461         /* Default to short cables on all phys. */
 462         oem->controller.cable_selection_mask = 0;
 463
 464         /* Initialize all of the port parameter information to narrow ports. */
 465         for (i = 0; i < SCI_MAX_PORTS; i++)
 466                 oem->ports[i].phy_mask = 0;
 467
 468         /* Initialize all of the phy parameter information. */
 469         for (i = 0; i < SCI_MAX_PHYS; i++) {
 470                 /* Default to 3G (i.e. Gen 2). */
 471                 user->phys[i].max_speed_generation = SCIC_SDS_PARM_GEN2_SPEED;
 472
 473                 /* the frequencies cannot be 0 */
 474                 user->phys[i].align_insertion_frequency = 0x7f;
 475                 user->phys[i].in_connection_align_insertion_frequency = 0xff;
 476                 user->phys[i].notify_enable_spin_up_insertion_frequency = 0x33;
 477
 478                 /* Previous Vitesse based expanders had a arbitration issue that
 479                  * is worked around by having the upper 32-bits of SAS address
 480                  * with a value greater then the Vitesse company identifier.
 481                  * Hence, usage of 0x5FCFFFFF.
 482                  */
 483                 oem->phys[i].sas_address.low = 0x1 + ihost->id;
 484                 oem->phys[i].sas_address.high = 0x5FCFFFFF;
 485         }
 486
 487         user->stp_inactivity_timeout = 5;
 488         user->ssp_inactivity_timeout = 5;
 489         user->stp_max_occupancy_timeout = 5;
 490         user->ssp_max_occupancy_timeout = 20;
 491         user->no_outbound_task_timeout = 2;
 492 }
 493
 494 static struct isci_host *isci_host_alloc(struct pci_dev *pdev, int id)
 495 {
 496         struct isci_orom *orom = to_pci_info(pdev)->orom;
 497         struct sci_user_parameters sci_user_params;
 498         u8 oem_version = ISCI_ROM_VER_1_0;
 499         struct isci_host *ihost;
 500         struct Scsi_Host *shost;
 501         int err, i;
 502
 503         ihost = devm_kzalloc(&pdev->dev, sizeof(*ihost), GFP_KERNEL);
 504         if (!ihost)
 505                 return NULL;
 506
 507         ihost->pdev = pdev;
 508         ihost->id = id;
 509         spin_lock_init(&ihost->scic_lock);
 510         init_waitqueue_head(&ihost->eventq);
 511         ihost->sas_ha.dev = &ihost->pdev->dev;
 512         ihost->sas_ha.lldd_ha = ihost;
 513         tasklet_init(&ihost->completion_tasklet,
 514                      isci_host_completion_routine, (unsigned long)ihost);
 515
 516         /* validate module parameters */
 517         /* TODO: kill struct sci_user_parameters and reference directly */
 518         sci_oem_defaults(ihost);
 519         isci_user_parameters_get(&sci_user_params);
 520         if (sci_user_parameters_set(ihost, &sci_user_params)) {
 521                 dev_warn(&pdev->dev,
 522                          "%s: sci_user_parameters_set failed\n", __func__);
 523                 return NULL;
 524         }
 525
 526         /* sanity check platform (or 'firmware') oem parameters */
 527         if (orom) {
 528                 if (id < 0 || id >= SCI_MAX_CONTROLLERS || id > orom->hdr.num_elements) {
 529                         dev_warn(&pdev->dev, "parsing firmware oem parameters failed\n");
 530                         return NULL;
 531                 }
 532                 ihost->oem_parameters = orom->ctrl[id];
 533                 oem_version = orom->hdr.version;
 534         }
 535
 536         /* validate oem parameters (platform, firmware, or built-in defaults) */
 537         if (sci_oem_parameters_validate(&ihost->oem_parameters, oem_version)) {
 538                 dev_warn(&pdev->dev, "oem parameter validation failed\n");
 539                 return NULL;
 540         }
 541
 542         for (i = 0; i < SCI_MAX_PORTS; i++) {
 543                 struct isci_port *iport = &ihost->ports[i];
 544
 545                 INIT_LIST_HEAD(&iport->remote_dev_list);
 546                 iport->isci_host = ihost;
 547         }
 548
 549         for (i = 0; i < SCI_MAX_PHYS; i++)
 550                 isci_phy_init(&ihost->phys[i], ihost, i);
 551
 552         for (i = 0; i < SCI_MAX_REMOTE_DEVICES; i++) {
 553                 struct isci_remote_device *idev = &ihost->devices[i];
 554
 555                 INIT_LIST_HEAD(&idev->node);
 556         }
 557
 558         shost = scsi_host_alloc(&isci_sht, sizeof(void *));
 559         if (!shost)
 560                 return NULL;
 561
 562         dev_info(&pdev->dev, "%sSCU controller %d: phy 3-0 cables: "
 563                  "{%s, %s, %s, %s}\n",
 564                  (is_cable_select_overridden() ? "* " : ""), ihost->id,
 565                  lookup_cable_names(decode_cable_selection(ihost, 3)),
 566                  lookup_cable_names(decode_cable_selection(ihost, 2)),
 567                  lookup_cable_names(decode_cable_selection(ihost, 1)),
 568                  lookup_cable_names(decode_cable_selection(ihost, 0)));
 569
 570         err = isci_host_init(ihost);
 571         if (err)
 572                 goto err_shost;
 573
 574         SHOST_TO_SAS_HA(shost) = &ihost->sas_ha;
 575         ihost->sas_ha.core.shost = shost;
 576         shost->transportt = isci_transport_template;
 577
 578         shost->max_id = ~0;
 579         shost->max_lun = ~0;
 580         shost->max_cmd_len = MAX_COMMAND_SIZE;
 581
 582         /* turn on DIF support */
 583         scsi_host_set_prot(shost,
 584                            SHOST_DIF_TYPE1_PROTECTION |
 585                            SHOST_DIF_TYPE2_PROTECTION |
 586                            SHOST_DIF_TYPE3_PROTECTION);
 587         scsi_host_set_guard(shost, SHOST_DIX_GUARD_CRC);
 588
 589         err = scsi_add_host(shost, &pdev->dev);
 590         if (err)
 591                 goto err_shost;
 592
 593         err = isci_register_sas_ha(ihost);
 594         if (err)
 595                 goto err_shost_remove;
 596
 597         return ihost;
 598
 599  err_shost_remove:
 600         scsi_remove_host(shost);
 601  err_shost:
 602         scsi_host_put(shost);
 603
 604         return NULL;
 605 }
 606
 607 static int isci_pci_probe(struct pci_dev *pdev, const struct pci_device_id *id)
 608 {
 609         struct isci_pci_info *pci_info;
 610         int err, i;
 611         struct isci_host *isci_host;
 612         const struct firmware *fw = NULL;
 613         struct isci_orom *orom = NULL;
 614         char *source = "(platform)";
 615
 616         dev_info(&pdev->dev, "driver configured for rev: %d silicon\n",
 617                  pdev->revision);
 618
 619         pci_info = devm_kzalloc(&pdev->dev, sizeof(*pci_info), GFP_KERNEL);
 620         if (!pci_info)
 621                 return -ENOMEM;
 622         pci_set_drvdata(pdev, pci_info);
 623
 624         if (efi_enabled(EFI_RUNTIME_SERVICES))
 625                 orom = isci_get_efi_var(pdev);
 626
 627         if (!orom)
 628                 orom = isci_request_oprom(pdev);
 629
 630         for (i = 0; orom && i < num_controllers(pdev); i++) {
 631                 if (sci_oem_parameters_validate(&orom->ctrl[i],
 632                                                 orom->hdr.version)) {
 633                         dev_warn(&pdev->dev,
 634                                  "[%d]: invalid oem parameters detected, falling back to firmware\n", i);
 635                         orom = NULL;
 636                         break;
 637                 }
 638         }
 639
 640         if (!orom) {
 641                 source = "(firmware)";
 642                 orom = isci_request_firmware(pdev, fw);
 643                 if (!orom) {
 644                         /* TODO convert this to WARN_TAINT_ONCE once the
 645                          * orom/efi parameter support is widely available
 646                          */
 647                         dev_warn(&pdev->dev,
 648                                  "Loading user firmware failed, using default "
 649                                  "values\n");
 650                         dev_warn(&pdev->dev,
 651                                  "Default OEM configuration being used: 4 "
 652                                  "narrow ports, and default SAS Addresses\n");
 653                 }
 654         }
 655
 656         if (orom)
 657                 dev_info(&pdev->dev,
 658                          "OEM SAS parameters (version: %u.%u) loaded %s\n",
 659                          (orom->hdr.version & 0xf0) >> 4,
 660                          (orom->hdr.version & 0xf), source);
 661
 662         pci_info->orom = orom;
 663
 664         err = isci_pci_init(pdev);
 665         if (err)
 666                 return err;
 667
 668         for (i = 0; i < num_controllers(pdev); i++) {
 669                 struct isci_host *h = isci_host_alloc(pdev, i);
 670
 671                 if (!h) {
 672                         err = -ENOMEM;
 673                         goto err_host_alloc;
 674                 }
 675                 pci_info->hosts[i] = h;
 676         }
 677
 678         err = isci_setup_interrupts(pdev);
 679         if (err)
 680                 goto err_host_alloc;
 681
 682         for_each_isci_host(i, isci_host, pdev)
 683                 scsi_scan_host(to_shost(isci_host));
 684
 685         return 0;
 686
 687  err_host_alloc:
 688         for_each_isci_host(i, isci_host, pdev)
 689                 isci_unregister(isci_host);
 690         return err;
 691 }
 692
 693 static void isci_pci_remove(struct pci_dev *pdev)
 694 {
 695         struct isci_host *ihost;
 696         int i;
 697
 698         for_each_isci_host(i, ihost, pdev) {
 699                 wait_for_start(ihost);
 700                 isci_unregister(ihost);
 701                 isci_host_deinit(ihost);
 702         }
 703 }
 704
 705 #ifdef CONFIG_PM_SLEEP
 706 static int isci_suspend(struct device *dev)
 707 {
 708         struct pci_dev *pdev = to_pci_dev(dev);
 709         struct isci_host *ihost;
 710         int i;
 711
 712         for_each_isci_host(i, ihost, pdev) {
 713                 sas_suspend_ha(&ihost->sas_ha);
 714                 isci_host_deinit(ihost);
 715         }
 716
 717         pci_save_state(pdev);
 718         pci_disable_device(pdev);
 719         pci_set_power_state(pdev, PCI_D3hot);
 720
 721         return 0;
 722 }
 723
 724 static int isci_resume(struct device *dev)
 725 {
 726         struct pci_dev *pdev = to_pci_dev(dev);
 727         struct isci_host *ihost;
 728         int rc, i;
 729
 730         pci_set_power_state(pdev, PCI_D0);
 731         pci_restore_state(pdev);
 732
 733         rc = pcim_enable_device(pdev);
 734         if (rc) {
 735                 dev_err(&pdev->dev,
 736                         "enabling device failure after resume(%d)\n", rc);
 737                 return rc;
 738         }
 739
 740         pci_set_master(pdev);
 741
 742         for_each_isci_host(i, ihost, pdev) {
 743                 sas_prep_resume_ha(&ihost->sas_ha);
 744
 745                 isci_host_init(ihost);
 746                 isci_host_start(ihost->sas_ha.core.shost);
 747                 wait_for_start(ihost);
 748
 749                 sas_resume_ha(&ihost->sas_ha);
 750         }
 751
 752         return 0;
 753 }
 754 #endif
 755
 756 static SIMPLE_DEV_PM_OPS(isci_pm_ops, isci_suspend, isci_resume);
 757
 758 static struct pci_driver isci_pci_driver = {
 759         .name           = DRV_NAME,
 760         .id_table       = isci_id_table,
 761         .probe          = isci_pci_probe,
 762         .remove         = isci_pci_remove,
 763         .driver.pm      = &isci_pm_ops,
 764 };
 765
 766 static __init int isci_init(void)
 767 {
 768         int err;
 769
 770         pr_info("%s: Intel(R) C600 SAS Controller Driver - version %s\n",
 771                 DRV_NAME, DRV_VERSION);
 772
 773         isci_transport_template = sas_domain_attach_transport(&isci_transport_ops);
 774         if (!isci_transport_template)
 775                 return -ENOMEM;
 776
 777         err = pci_register_driver(&isci_pci_driver);
 778         if (err)
 779                 sas_release_transport(isci_transport_template);
 780
 781         return err;
 782 }
 783
 784 static __exit void isci_exit(void)
 785 {
 786         pci_unregister_driver(&isci_pci_driver);
 787         sas_release_transport(isci_transport_template);
 788 }
 789
 790 MODULE_LICENSE("Dual BSD/GPL");
 791 MODULE_FIRMWARE(ISCI_FW_NAME);
 792 module_init(isci_init);
 793 module_exit(isci_exit);