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 1
  70 #define BUILD 0
  71 #define DRV_VERSION __stringify(MAJ) "." __stringify(MIN) "." \
  72         __stringify(BUILD)
  73
  74 MODULE_VERSION(DRV_VERSION);
  75
  76 static struct scsi_transport_template *isci_transport_template;
  77
  78 static DEFINE_PCI_DEVICE_TABLE(isci_id_table) = {
  79         { PCI_VDEVICE(INTEL, 0x1D61),},
  80         { PCI_VDEVICE(INTEL, 0x1D63),},
  81         { PCI_VDEVICE(INTEL, 0x1D65),},
  82         { PCI_VDEVICE(INTEL, 0x1D67),},
  83         { PCI_VDEVICE(INTEL, 0x1D69),},
  84         { PCI_VDEVICE(INTEL, 0x1D6B),},
  85         { PCI_VDEVICE(INTEL, 0x1D60),},
  86         { PCI_VDEVICE(INTEL, 0x1D62),},
  87         { PCI_VDEVICE(INTEL, 0x1D64),},
  88         { PCI_VDEVICE(INTEL, 0x1D66),},
  89         { PCI_VDEVICE(INTEL, 0x1D68),},
  90         { PCI_VDEVICE(INTEL, 0x1D6A),},
  91         {}
  92 };
  93
  94 MODULE_DEVICE_TABLE(pci, isci_id_table);
  95
  96 /* linux isci specific settings */
  97
  98 unsigned char no_outbound_task_to = 2;
  99 module_param(no_outbound_task_to, byte, 0);
 100 MODULE_PARM_DESC(no_outbound_task_to, "No Outbound Task Timeout (1us incr)");
 101
 102 u16 ssp_max_occ_to = 20;
 103 module_param(ssp_max_occ_to, ushort, 0);
 104 MODULE_PARM_DESC(ssp_max_occ_to, "SSP Max occupancy timeout (100us incr)");
 105
 106 u16 stp_max_occ_to = 5;
 107 module_param(stp_max_occ_to, ushort, 0);
 108 MODULE_PARM_DESC(stp_max_occ_to, "STP Max occupancy timeout (100us incr)");
 109
 110 u16 ssp_inactive_to = 5;
 111 module_param(ssp_inactive_to, ushort, 0);
 112 MODULE_PARM_DESC(ssp_inactive_to, "SSP inactivity timeout (100us incr)");
 113
 114 u16 stp_inactive_to = 5;
 115 module_param(stp_inactive_to, ushort, 0);
 116 MODULE_PARM_DESC(stp_inactive_to, "STP inactivity timeout (100us incr)");
 117
 118 unsigned char phy_gen = SCIC_SDS_PARM_GEN2_SPEED;
 119 module_param(phy_gen, byte, 0);
 120 MODULE_PARM_DESC(phy_gen, "PHY generation (1: 1.5Gbps 2: 3.0Gbps 3: 6.0Gbps)");
 121
 122 unsigned char max_concurr_spinup;
 123 module_param(max_concurr_spinup, byte, 0);
 124 MODULE_PARM_DESC(max_concurr_spinup, "Max concurrent device spinup");
 125
 126 uint cable_selection_override = CABLE_OVERRIDE_DISABLED;
 127 module_param(cable_selection_override, uint, 0);
 128
 129 MODULE_PARM_DESC(cable_selection_override,
 130                  "This field indicates length of the SAS/SATA cable between "
 131                  "host and device. If any bits > 15 are set (default) "
 132                  "indicates \"use platform defaults\"");
 133
 134 static ssize_t isci_show_id(struct device *dev, struct device_attribute *attr, char *buf)
 135 {
 136         struct Scsi_Host *shost = container_of(dev, typeof(*shost), shost_dev);
 137         struct sas_ha_struct *sas_ha = SHOST_TO_SAS_HA(shost);
 138         struct isci_host *ihost = container_of(sas_ha, typeof(*ihost), sas_ha);
 139
 140         return snprintf(buf, PAGE_SIZE, "%d\n", ihost->id);
 141 }
 142
 143 static DEVICE_ATTR(isci_id, S_IRUGO, isci_show_id, NULL);
 144
 145 struct device_attribute *isci_host_attrs[] = {
 146         &dev_attr_isci_id,
 147         NULL
 148 };
 149
 150 static struct scsi_host_template isci_sht = {
 151
 152         .module                         = THIS_MODULE,
 153         .name                           = DRV_NAME,
 154         .proc_name                      = DRV_NAME,
 155         .queuecommand                   = sas_queuecommand,
 156         .target_alloc                   = sas_target_alloc,
 157         .slave_configure                = sas_slave_configure,
 158         .scan_finished                  = isci_host_scan_finished,
 159         .scan_start                     = isci_host_scan_start,
 160         .change_queue_depth             = sas_change_queue_depth,
 161         .change_queue_type              = sas_change_queue_type,
 162         .bios_param                     = sas_bios_param,
 163         .can_queue                      = ISCI_CAN_QUEUE_VAL,
 164         .cmd_per_lun                    = 1,
 165         .this_id                        = -1,
 166         .sg_tablesize                   = SG_ALL,
 167         .max_sectors                    = SCSI_DEFAULT_MAX_SECTORS,
 168         .use_clustering                 = ENABLE_CLUSTERING,
 169         .target_destroy                 = sas_target_destroy,
 170         .ioctl                          = sas_ioctl,
 171         .shost_attrs                    = isci_host_attrs,
 172 };
 173
 174 static struct sas_domain_function_template isci_transport_ops  = {
 175
 176         /* The class calls these to notify the LLDD of an event. */
 177         .lldd_port_formed       = isci_port_formed,
 178         .lldd_port_deformed     = isci_port_deformed,
 179
 180         /* The class calls these when a device is found or gone. */
 181         .lldd_dev_found         = isci_remote_device_found,
 182         .lldd_dev_gone          = isci_remote_device_gone,
 183
 184         .lldd_execute_task      = isci_task_execute_task,
 185         /* Task Management Functions. Must be called from process context. */
 186         .lldd_abort_task        = isci_task_abort_task,
 187         .lldd_abort_task_set    = isci_task_abort_task_set,
 188         .lldd_clear_aca         = isci_task_clear_aca,
 189         .lldd_clear_task_set    = isci_task_clear_task_set,
 190         .lldd_I_T_nexus_reset   = isci_task_I_T_nexus_reset,
 191         .lldd_lu_reset          = isci_task_lu_reset,
 192         .lldd_query_task        = isci_task_query_task,
 193
 194         /* ata recovery called from ata-eh */
 195         .lldd_ata_check_ready   = isci_ata_check_ready,
 196
 197         /* Port and Adapter management */
 198         .lldd_clear_nexus_port  = isci_task_clear_nexus_port,
 199         .lldd_clear_nexus_ha    = isci_task_clear_nexus_ha,
 200
 201         /* Phy management */
 202         .lldd_control_phy       = isci_phy_control,
 203
 204         /* GPIO support */
 205         .lldd_write_gpio        = isci_gpio_write,
 206 };
 207
 208
 209 /******************************************************************************
 210 * P R O T E C T E D  M E T H O D S
 211 ******************************************************************************/
 212
 213
 214
 215 /**
 216  * isci_register_sas_ha() - This method initializes various lldd
 217  *    specific members of the sas_ha struct and calls the libsas
 218  *    sas_register_ha() function.
 219  * @isci_host: This parameter specifies the lldd specific wrapper for the
 220  *    libsas sas_ha struct.
 221  *
 222  * This method returns an error code indicating sucess or failure. The user
 223  * should check for possible memory allocation error return otherwise, a zero
 224  * indicates success.
 225  */
 226 static int isci_register_sas_ha(struct isci_host *isci_host)
 227 {
 228         int i;
 229         struct sas_ha_struct *sas_ha = &(isci_host->sas_ha);
 230         struct asd_sas_phy **sas_phys;
 231         struct asd_sas_port **sas_ports;
 232
 233         sas_phys = devm_kzalloc(&isci_host->pdev->dev,
 234                                 SCI_MAX_PHYS * sizeof(void *),
 235                                 GFP_KERNEL);
 236         if (!sas_phys)
 237                 return -ENOMEM;
 238
 239         sas_ports = devm_kzalloc(&isci_host->pdev->dev,
 240                                  SCI_MAX_PORTS * sizeof(void *),
 241                                  GFP_KERNEL);
 242         if (!sas_ports)
 243                 return -ENOMEM;
 244
 245         sas_ha->sas_ha_name = DRV_NAME;
 246         sas_ha->lldd_module = THIS_MODULE;
 247         sas_ha->sas_addr    = &isci_host->phys[0].sas_addr[0];
 248
 249         for (i = 0; i < SCI_MAX_PHYS; i++) {
 250                 sas_phys[i] = &isci_host->phys[i].sas_phy;
 251                 sas_ports[i] = &isci_host->sas_ports[i];
 252         }
 253
 254         sas_ha->sas_phy  = sas_phys;
 255         sas_ha->sas_port = sas_ports;
 256         sas_ha->num_phys = SCI_MAX_PHYS;
 257
 258         sas_ha->lldd_queue_size = ISCI_CAN_QUEUE_VAL;
 259         sas_ha->lldd_max_execute_num = 1;
 260         sas_ha->strict_wide_ports = 1;
 261
 262         sas_register_ha(sas_ha);
 263
 264         return 0;
 265 }
 266
 267 static void isci_unregister(struct isci_host *isci_host)
 268 {
 269         struct Scsi_Host *shost;
 270
 271         if (!isci_host)
 272                 return;
 273
 274         shost = isci_host->shost;
 275
 276         sas_unregister_ha(&isci_host->sas_ha);
 277
 278         sas_remove_host(isci_host->shost);
 279         scsi_remove_host(isci_host->shost);
 280         scsi_host_put(isci_host->shost);
 281 }
 282
 283 static int __devinit 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 = pci_set_dma_mask(pdev, DMA_BIT_MASK(64));
 310         if (err) {
 311                 err = pci_set_dma_mask(pdev, DMA_BIT_MASK(32));
 312                 if (err)
 313                         return err;
 314         }
 315
 316         err = pci_set_consistent_dma_mask(pdev, DMA_BIT_MASK(64));
 317         if (err) {
 318                 err = pci_set_consistent_dma_mask(pdev, DMA_BIT_MASK(32));
 319                 if (err)
 320                         return err;
 321         }
 322
 323         return 0;
 324 }
 325
 326 static int num_controllers(struct pci_dev *pdev)
 327 {
 328         /* bar size alone can tell us if we are running with a dual controller
 329          * part, no need to trust revision ids that might be under broken firmware
 330          * control
 331          */
 332         resource_size_t scu_bar_size = pci_resource_len(pdev, SCI_SCU_BAR*2);
 333         resource_size_t smu_bar_size = pci_resource_len(pdev, SCI_SMU_BAR*2);
 334
 335         if (scu_bar_size >= SCI_SCU_BAR_SIZE*SCI_MAX_CONTROLLERS &&
 336             smu_bar_size >= SCI_SMU_BAR_SIZE*SCI_MAX_CONTROLLERS)
 337                 return SCI_MAX_CONTROLLERS;
 338         else
 339                 return 1;
 340 }
 341
 342 static int isci_setup_interrupts(struct pci_dev *pdev)
 343 {
 344         int err, i, num_msix;
 345         struct isci_host *ihost;
 346         struct isci_pci_info *pci_info = to_pci_info(pdev);
 347
 348         /*
 349          *  Determine the number of vectors associated with this
 350          *  PCI function.
 351          */
 352         num_msix = num_controllers(pdev) * SCI_NUM_MSI_X_INT;
 353
 354         for (i = 0; i < num_msix; i++)
 355                 pci_info->msix_entries[i].entry = i;
 356
 357         err = pci_enable_msix(pdev, pci_info->msix_entries, num_msix);
 358         if (err)
 359                 goto intx;
 360
 361         for (i = 0; i < num_msix; i++) {
 362                 int id = i / SCI_NUM_MSI_X_INT;
 363                 struct msix_entry *msix = &pci_info->msix_entries[i];
 364                 irq_handler_t isr;
 365
 366                 ihost = pci_info->hosts[id];
 367                 /* odd numbered vectors are error interrupts */
 368                 if (i & 1)
 369                         isr = isci_error_isr;
 370                 else
 371                         isr = isci_msix_isr;
 372
 373                 err = devm_request_irq(&pdev->dev, msix->vector, isr, 0,
 374                                        DRV_NAME"-msix", ihost);
 375                 if (!err)
 376                         continue;
 377
 378                 dev_info(&pdev->dev, "msix setup failed falling back to intx\n");
 379                 while (i--) {
 380                         id = i / SCI_NUM_MSI_X_INT;
 381                         ihost = pci_info->hosts[id];
 382                         msix = &pci_info->msix_entries[i];
 383                         devm_free_irq(&pdev->dev, msix->vector, ihost);
 384                 }
 385                 pci_disable_msix(pdev);
 386                 goto intx;
 387         }
 388         return 0;
 389
 390  intx:
 391         for_each_isci_host(i, ihost, pdev) {
 392                 err = devm_request_irq(&pdev->dev, pdev->irq, isci_intx_isr,
 393                                        IRQF_SHARED, DRV_NAME"-intx", ihost);
 394                 if (err)
 395                         break;
 396         }
 397         return err;
 398 }
 399
 400 static struct isci_host *isci_host_alloc(struct pci_dev *pdev, int id)
 401 {
 402         struct isci_host *isci_host;
 403         struct Scsi_Host *shost;
 404         int err;
 405
 406         isci_host = devm_kzalloc(&pdev->dev, sizeof(*isci_host), GFP_KERNEL);
 407         if (!isci_host)
 408                 return NULL;
 409
 410         isci_host->pdev = pdev;
 411         isci_host->id = id;
 412
 413         shost = scsi_host_alloc(&isci_sht, sizeof(void *));
 414         if (!shost)
 415                 return NULL;
 416         isci_host->shost = shost;
 417
 418         dev_info(&pdev->dev, "%sSCU controller %d: phy 3-0 cables: "
 419                  "{%s, %s, %s, %s}\n",
 420                  (is_cable_select_overridden() ? "* " : ""), isci_host->id,
 421                  lookup_cable_names(decode_cable_selection(isci_host, 3)),
 422                  lookup_cable_names(decode_cable_selection(isci_host, 2)),
 423                  lookup_cable_names(decode_cable_selection(isci_host, 1)),
 424                  lookup_cable_names(decode_cable_selection(isci_host, 0)));
 425
 426         err = isci_host_init(isci_host);
 427         if (err)
 428                 goto err_shost;
 429
 430         SHOST_TO_SAS_HA(shost) = &isci_host->sas_ha;
 431         isci_host->sas_ha.core.shost = shost;
 432         shost->transportt = isci_transport_template;
 433
 434         shost->max_id = ~0;
 435         shost->max_lun = ~0;
 436         shost->max_cmd_len = MAX_COMMAND_SIZE;
 437
 438         err = scsi_add_host(shost, &pdev->dev);
 439         if (err)
 440                 goto err_shost;
 441
 442         err = isci_register_sas_ha(isci_host);
 443         if (err)
 444                 goto err_shost_remove;
 445
 446         return isci_host;
 447
 448  err_shost_remove:
 449         scsi_remove_host(shost);
 450  err_shost:
 451         scsi_host_put(shost);
 452
 453         return NULL;
 454 }
 455
 456 static int __devinit isci_pci_probe(struct pci_dev *pdev, const struct pci_device_id *id)
 457 {
 458         struct isci_pci_info *pci_info;
 459         int err, i;
 460         struct isci_host *isci_host;
 461         const struct firmware *fw = NULL;
 462         struct isci_orom *orom = NULL;
 463         char *source = "(platform)";
 464
 465         dev_info(&pdev->dev, "driver configured for rev: %d silicon\n",
 466                  pdev->revision);
 467
 468         pci_info = devm_kzalloc(&pdev->dev, sizeof(*pci_info), GFP_KERNEL);
 469         if (!pci_info)
 470                 return -ENOMEM;
 471         pci_set_drvdata(pdev, pci_info);
 472
 473         if (efi_enabled(EFI_RUNTIME_SERVICES))
 474                 orom = isci_get_efi_var(pdev);
 475
 476         if (!orom)
 477                 orom = isci_request_oprom(pdev);
 478
 479         for (i = 0; orom && i < num_controllers(pdev); i++) {
 480                 if (sci_oem_parameters_validate(&orom->ctrl[i],
 481                                                 orom->hdr.version)) {
 482                         dev_warn(&pdev->dev,
 483                                  "[%d]: invalid oem parameters detected, falling back to firmware\n", i);
 484                         orom = NULL;
 485                         break;
 486                 }
 487         }
 488
 489         if (!orom) {
 490                 source = "(firmware)";
 491                 orom = isci_request_firmware(pdev, fw);
 492                 if (!orom) {
 493                         /* TODO convert this to WARN_TAINT_ONCE once the
 494                          * orom/efi parameter support is widely available
 495                          */
 496                         dev_warn(&pdev->dev,
 497                                  "Loading user firmware failed, using default "
 498                                  "values\n");
 499                         dev_warn(&pdev->dev,
 500                                  "Default OEM configuration being used: 4 "
 501                                  "narrow ports, and default SAS Addresses\n");
 502                 }
 503         }
 504
 505         if (orom)
 506                 dev_info(&pdev->dev,
 507                          "OEM SAS parameters (version: %u.%u) loaded %s\n",
 508                          (orom->hdr.version & 0xf0) >> 4,
 509                          (orom->hdr.version & 0xf), source);
 510
 511         pci_info->orom = orom;
 512
 513         err = isci_pci_init(pdev);
 514         if (err)
 515                 return err;
 516
 517         for (i = 0; i < num_controllers(pdev); i++) {
 518                 struct isci_host *h = isci_host_alloc(pdev, i);
 519
 520                 if (!h) {
 521                         err = -ENOMEM;
 522                         goto err_host_alloc;
 523                 }
 524                 pci_info->hosts[i] = h;
 525
 526                 /* turn on DIF support */
 527                 scsi_host_set_prot(h->shost,
 528                                    SHOST_DIF_TYPE1_PROTECTION |
 529                                    SHOST_DIF_TYPE2_PROTECTION |
 530                                    SHOST_DIF_TYPE3_PROTECTION);
 531                 scsi_host_set_guard(h->shost, SHOST_DIX_GUARD_CRC);
 532         }
 533
 534         err = isci_setup_interrupts(pdev);
 535         if (err)
 536                 goto err_host_alloc;
 537
 538         for_each_isci_host(i, isci_host, pdev)
 539                 scsi_scan_host(isci_host->shost);
 540
 541         return 0;
 542
 543  err_host_alloc:
 544         for_each_isci_host(i, isci_host, pdev)
 545                 isci_unregister(isci_host);
 546         return err;
 547 }
 548
 549 static void __devexit isci_pci_remove(struct pci_dev *pdev)
 550 {
 551         struct isci_host *ihost;
 552         int i;
 553
 554         for_each_isci_host(i, ihost, pdev) {
 555                 wait_for_start(ihost);
 556                 isci_unregister(ihost);
 557                 isci_host_deinit(ihost);
 558         }
 559 }
 560
 561 static struct pci_driver isci_pci_driver = {
 562         .name           = DRV_NAME,
 563         .id_table       = isci_id_table,
 564         .probe          = isci_pci_probe,
 565         .remove         = __devexit_p(isci_pci_remove),
 566 };
 567
 568 static __init int isci_init(void)
 569 {
 570         int err;
 571
 572         pr_info("%s: Intel(R) C600 SAS Controller Driver - version %s\n",
 573                 DRV_NAME, DRV_VERSION);
 574
 575         isci_transport_template = sas_domain_attach_transport(&isci_transport_ops);
 576         if (!isci_transport_template)
 577                 return -ENOMEM;
 578
 579         err = pci_register_driver(&isci_pci_driver);
 580         if (err)
 581                 sas_release_transport(isci_transport_template);
 582
 583         return err;
 584 }
 585
 586 static __exit void isci_exit(void)
 587 {
 588         pci_unregister_driver(&isci_pci_driver);
 589         sas_release_transport(isci_transport_template);
 590 }
 591
 592 MODULE_LICENSE("Dual BSD/GPL");
 593 MODULE_FIRMWARE(ISCI_FW_NAME);
 594 module_init(isci_init);
 595 module_exit(isci_exit);