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 "isci.h"
  64 #include "task.h"
  65 #include "probe_roms.h"
  66
  67 #define MAJ 1
  68 #define MIN 0
  69 #define BUILD 0
  70 #define DRV_VERSION __stringify(MAJ) "." __stringify(MIN) "." \
  71         __stringify(BUILD)
  72
  73 MODULE_VERSION(DRV_VERSION);
  74
  75 static struct scsi_transport_template *isci_transport_template;
  76
  77 static DEFINE_PCI_DEVICE_TABLE(isci_id_table) = {
  78         { PCI_VDEVICE(INTEL, 0x1D61),},
  79         { PCI_VDEVICE(INTEL, 0x1D63),},
  80         { PCI_VDEVICE(INTEL, 0x1D65),},
  81         { PCI_VDEVICE(INTEL, 0x1D67),},
  82         { PCI_VDEVICE(INTEL, 0x1D69),},
  83         { PCI_VDEVICE(INTEL, 0x1D6B),},
  84         { PCI_VDEVICE(INTEL, 0x1D60),},
  85         { PCI_VDEVICE(INTEL, 0x1D62),},
  86         { PCI_VDEVICE(INTEL, 0x1D64),},
  87         { PCI_VDEVICE(INTEL, 0x1D66),},
  88         { PCI_VDEVICE(INTEL, 0x1D68),},
  89         { PCI_VDEVICE(INTEL, 0x1D6A),},
  90         {}
  91 };
  92
  93 MODULE_DEVICE_TABLE(pci, isci_id_table);
  94
  95 /* linux isci specific settings */
  96
  97 unsigned char no_outbound_task_to = 20;
  98 module_param(no_outbound_task_to, byte, 0);
  99 MODULE_PARM_DESC(no_outbound_task_to, "No Outbound Task Timeout (1us incr)");
 100
 101 u16 ssp_max_occ_to = 20;
 102 module_param(ssp_max_occ_to, ushort, 0);
 103 MODULE_PARM_DESC(ssp_max_occ_to, "SSP Max occupancy timeout (100us incr)");
 104
 105 u16 stp_max_occ_to = 5;
 106 module_param(stp_max_occ_to, ushort, 0);
 107 MODULE_PARM_DESC(stp_max_occ_to, "STP Max occupancy timeout (100us incr)");
 108
 109 u16 ssp_inactive_to = 5;
 110 module_param(ssp_inactive_to, ushort, 0);
 111 MODULE_PARM_DESC(ssp_inactive_to, "SSP inactivity timeout (100us incr)");
 112
 113 u16 stp_inactive_to = 5;
 114 module_param(stp_inactive_to, ushort, 0);
 115 MODULE_PARM_DESC(stp_inactive_to, "STP inactivity timeout (100us incr)");
 116
 117 unsigned char phy_gen = 3;
 118 module_param(phy_gen, byte, 0);
 119 MODULE_PARM_DESC(phy_gen, "PHY generation (1: 1.5Gbps 2: 3.0Gbps 3: 6.0Gbps)");
 120
 121 unsigned char max_concurr_spinup;
 122 module_param(max_concurr_spinup, byte, 0);
 123 MODULE_PARM_DESC(max_concurr_spinup, "Max concurrent device spinup");
 124
 125 static ssize_t isci_show_id(struct device *dev, struct device_attribute *attr, char *buf)
 126 {
 127         struct Scsi_Host *shost = container_of(dev, typeof(*shost), shost_dev);
 128         struct sas_ha_struct *sas_ha = SHOST_TO_SAS_HA(shost);
 129         struct isci_host *ihost = container_of(sas_ha, typeof(*ihost), sas_ha);
 130
 131         return snprintf(buf, PAGE_SIZE, "%d\n", ihost->id);
 132 }
 133
 134 static DEVICE_ATTR(isci_id, S_IRUGO, isci_show_id, NULL);
 135
 136 struct device_attribute *isci_host_attrs[] = {
 137         &dev_attr_isci_id,
 138         NULL
 139 };
 140
 141 static struct scsi_host_template isci_sht = {
 142
 143         .module                         = THIS_MODULE,
 144         .name                           = DRV_NAME,
 145         .proc_name                      = DRV_NAME,
 146         .queuecommand                   = sas_queuecommand,
 147         .target_alloc                   = sas_target_alloc,
 148         .slave_configure                = sas_slave_configure,
 149         .slave_destroy                  = sas_slave_destroy,
 150         .scan_finished                  = isci_host_scan_finished,
 151         .scan_start                     = isci_host_scan_start,
 152         .change_queue_depth             = sas_change_queue_depth,
 153         .change_queue_type              = sas_change_queue_type,
 154         .bios_param                     = sas_bios_param,
 155         .can_queue                      = ISCI_CAN_QUEUE_VAL,
 156         .cmd_per_lun                    = 1,
 157         .this_id                        = -1,
 158         .sg_tablesize                   = SG_ALL,
 159         .max_sectors                    = SCSI_DEFAULT_MAX_SECTORS,
 160         .use_clustering                 = ENABLE_CLUSTERING,
 161         .eh_device_reset_handler        = sas_eh_device_reset_handler,
 162         .eh_bus_reset_handler           = isci_bus_reset_handler,
 163         .slave_alloc                    = sas_slave_alloc,
 164         .target_destroy                 = sas_target_destroy,
 165         .ioctl                          = sas_ioctl,
 166         .shost_attrs                    = isci_host_attrs,
 167 };
 168
 169 static struct sas_domain_function_template isci_transport_ops  = {
 170
 171         /* The class calls these to notify the LLDD of an event. */
 172         .lldd_port_formed       = isci_port_formed,
 173         .lldd_port_deformed     = isci_port_deformed,
 174
 175         /* The class calls these when a device is found or gone. */
 176         .lldd_dev_found         = isci_remote_device_found,
 177         .lldd_dev_gone          = isci_remote_device_gone,
 178
 179         .lldd_execute_task      = isci_task_execute_task,
 180         /* Task Management Functions. Must be called from process context. */
 181         .lldd_abort_task        = isci_task_abort_task,
 182         .lldd_abort_task_set    = isci_task_abort_task_set,
 183         .lldd_clear_aca         = isci_task_clear_aca,
 184         .lldd_clear_task_set    = isci_task_clear_task_set,
 185         .lldd_I_T_nexus_reset   = isci_task_I_T_nexus_reset,
 186         .lldd_lu_reset          = isci_task_lu_reset,
 187         .lldd_query_task        = isci_task_query_task,
 188
 189         /* Port and Adapter management */
 190         .lldd_clear_nexus_port  = isci_task_clear_nexus_port,
 191         .lldd_clear_nexus_ha    = isci_task_clear_nexus_ha,
 192
 193         /* Phy management */
 194         .lldd_control_phy       = isci_phy_control,
 195
 196         /* GPIO support */
 197         .lldd_write_gpio        = isci_gpio_write,
 198 };
 199
 200
 201 /******************************************************************************
 202 * P R O T E C T E D  M E T H O D S
 203 ******************************************************************************/
 204
 205
 206
 207 /**
 208  * isci_register_sas_ha() - This method initializes various lldd
 209  *    specific members of the sas_ha struct and calls the libsas
 210  *    sas_register_ha() function.
 211  * @isci_host: This parameter specifies the lldd specific wrapper for the
 212  *    libsas sas_ha struct.
 213  *
 214  * This method returns an error code indicating sucess or failure. The user
 215  * should check for possible memory allocation error return otherwise, a zero
 216  * indicates success.
 217  */
 218 static int isci_register_sas_ha(struct isci_host *isci_host)
 219 {
 220         int i;
 221         struct sas_ha_struct *sas_ha = &(isci_host->sas_ha);
 222         struct asd_sas_phy **sas_phys;
 223         struct asd_sas_port **sas_ports;
 224
 225         sas_phys = devm_kzalloc(&isci_host->pdev->dev,
 226                                 SCI_MAX_PHYS * sizeof(void *),
 227                                 GFP_KERNEL);
 228         if (!sas_phys)
 229                 return -ENOMEM;
 230
 231         sas_ports = devm_kzalloc(&isci_host->pdev->dev,
 232                                  SCI_MAX_PORTS * sizeof(void *),
 233                                  GFP_KERNEL);
 234         if (!sas_ports)
 235                 return -ENOMEM;
 236
 237         /*----------------- Libsas Initialization Stuff----------------------
 238          * Set various fields in the sas_ha struct:
 239          */
 240
 241         sas_ha->sas_ha_name = DRV_NAME;
 242         sas_ha->lldd_module = THIS_MODULE;
 243         sas_ha->sas_addr    = &isci_host->phys[0].sas_addr[0];
 244
 245         /* set the array of phy and port structs.  */
 246         for (i = 0; i < SCI_MAX_PHYS; i++) {
 247                 sas_phys[i] = &isci_host->phys[i].sas_phy;
 248                 sas_ports[i] = &isci_host->ports[i].sas_port;
 249         }
 250
 251         sas_ha->sas_phy  = sas_phys;
 252         sas_ha->sas_port = sas_ports;
 253         sas_ha->num_phys = SCI_MAX_PHYS;
 254
 255         sas_ha->lldd_queue_size = ISCI_CAN_QUEUE_VAL;
 256         sas_ha->lldd_max_execute_num = 1;
 257         sas_ha->strict_wide_ports = 1;
 258
 259         sas_register_ha(sas_ha);
 260
 261         return 0;
 262 }
 263
 264 static void isci_unregister(struct isci_host *isci_host)
 265 {
 266         struct Scsi_Host *shost;
 267
 268         if (!isci_host)
 269                 return;
 270
 271         shost = isci_host->shost;
 272
 273         sas_unregister_ha(&isci_host->sas_ha);
 274
 275         sas_remove_host(isci_host->shost);
 276         scsi_remove_host(isci_host->shost);
 277         scsi_host_put(isci_host->shost);
 278 }
 279
 280 static int __devinit 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 = pci_set_dma_mask(pdev, DMA_BIT_MASK(64));
 307         if (err) {
 308                 err = pci_set_dma_mask(pdev, DMA_BIT_MASK(32));
 309                 if (err)
 310                         return err;
 311         }
 312
 313         err = pci_set_consistent_dma_mask(pdev, DMA_BIT_MASK(64));
 314         if (err) {
 315                 err = pci_set_consistent_dma_mask(pdev, DMA_BIT_MASK(32));
 316                 if (err)
 317                         return err;
 318         }
 319
 320         return 0;
 321 }
 322
 323 static int num_controllers(struct pci_dev *pdev)
 324 {
 325         /* bar size alone can tell us if we are running with a dual controller
 326          * part, no need to trust revision ids that might be under broken firmware
 327          * control
 328          */
 329         resource_size_t scu_bar_size = pci_resource_len(pdev, SCI_SCU_BAR*2);
 330         resource_size_t smu_bar_size = pci_resource_len(pdev, SCI_SMU_BAR*2);
 331
 332         if (scu_bar_size >= SCI_SCU_BAR_SIZE*SCI_MAX_CONTROLLERS &&
 333             smu_bar_size >= SCI_SMU_BAR_SIZE*SCI_MAX_CONTROLLERS)
 334                 return SCI_MAX_CONTROLLERS;
 335         else
 336                 return 1;
 337 }
 338
 339 static int isci_setup_interrupts(struct pci_dev *pdev)
 340 {
 341         int err, i, num_msix;
 342         struct isci_host *ihost;
 343         struct isci_pci_info *pci_info = to_pci_info(pdev);
 344
 345         /*
 346          *  Determine the number of vectors associated with this
 347          *  PCI function.
 348          */
 349         num_msix = num_controllers(pdev) * SCI_NUM_MSI_X_INT;
 350
 351         for (i = 0; i < num_msix; i++)
 352                 pci_info->msix_entries[i].entry = i;
 353
 354         err = pci_enable_msix(pdev, pci_info->msix_entries, num_msix);
 355         if (err)
 356                 goto intx;
 357
 358         for (i = 0; i < num_msix; i++) {
 359                 int id = i / SCI_NUM_MSI_X_INT;
 360                 struct msix_entry *msix = &pci_info->msix_entries[i];
 361                 irq_handler_t isr;
 362
 363                 ihost = pci_info->hosts[id];
 364                 /* odd numbered vectors are error interrupts */
 365                 if (i & 1)
 366                         isr = isci_error_isr;
 367                 else
 368                         isr = isci_msix_isr;
 369
 370                 err = devm_request_irq(&pdev->dev, msix->vector, isr, 0,
 371                                        DRV_NAME"-msix", ihost);
 372                 if (!err)
 373                         continue;
 374
 375                 dev_info(&pdev->dev, "msix setup failed falling back to intx\n");
 376                 while (i--) {
 377                         id = i / SCI_NUM_MSI_X_INT;
 378                         ihost = pci_info->hosts[id];
 379                         msix = &pci_info->msix_entries[i];
 380                         devm_free_irq(&pdev->dev, msix->vector, ihost);
 381                 }
 382                 pci_disable_msix(pdev);
 383                 goto intx;
 384         }
 385         return 0;
 386
 387  intx:
 388         for_each_isci_host(i, ihost, pdev) {
 389                 err = devm_request_irq(&pdev->dev, pdev->irq, isci_intx_isr,
 390                                        IRQF_SHARED, DRV_NAME"-intx", ihost);
 391                 if (err)
 392                         break;
 393         }
 394         return err;
 395 }
 396
 397 static struct isci_host *isci_host_alloc(struct pci_dev *pdev, int id)
 398 {
 399         struct isci_host *isci_host;
 400         struct Scsi_Host *shost;
 401         int err;
 402
 403         isci_host = devm_kzalloc(&pdev->dev, sizeof(*isci_host), GFP_KERNEL);
 404         if (!isci_host)
 405                 return NULL;
 406
 407         isci_host->pdev = pdev;
 408         isci_host->id = id;
 409
 410         shost = scsi_host_alloc(&isci_sht, sizeof(void *));
 411         if (!shost)
 412                 return NULL;
 413         isci_host->shost = shost;
 414
 415         err = isci_host_init(isci_host);
 416         if (err)
 417                 goto err_shost;
 418
 419         SHOST_TO_SAS_HA(shost) = &isci_host->sas_ha;
 420         isci_host->sas_ha.core.shost = shost;
 421         shost->transportt = isci_transport_template;
 422
 423         shost->max_id = ~0;
 424         shost->max_lun = ~0;
 425         shost->max_cmd_len = MAX_COMMAND_SIZE;
 426
 427         err = scsi_add_host(shost, &pdev->dev);
 428         if (err)
 429                 goto err_shost;
 430
 431         err = isci_register_sas_ha(isci_host);
 432         if (err)
 433                 goto err_shost_remove;
 434
 435         return isci_host;
 436
 437  err_shost_remove:
 438         scsi_remove_host(shost);
 439  err_shost:
 440         scsi_host_put(shost);
 441
 442         return NULL;
 443 }
 444
 445 static int __devinit isci_pci_probe(struct pci_dev *pdev, const struct pci_device_id *id)
 446 {
 447         struct isci_pci_info *pci_info;
 448         int err, i;
 449         struct isci_host *isci_host;
 450         const struct firmware *fw = NULL;
 451         struct isci_orom *orom = NULL;
 452         char *source = "(platform)";
 453
 454         dev_info(&pdev->dev, "driver configured for rev: %d silicon\n",
 455                  pdev->revision);
 456
 457         pci_info = devm_kzalloc(&pdev->dev, sizeof(*pci_info), GFP_KERNEL);
 458         if (!pci_info)
 459                 return -ENOMEM;
 460         pci_set_drvdata(pdev, pci_info);
 461
 462         if (efi_enabled)
 463                 orom = isci_get_efi_var(pdev);
 464
 465         if (!orom)
 466                 orom = isci_request_oprom(pdev);
 467
 468         for (i = 0; orom && i < ARRAY_SIZE(orom->ctrl); i++) {
 469                 if (sci_oem_parameters_validate(&orom->ctrl[i])) {
 470                         dev_warn(&pdev->dev,
 471                                  "[%d]: invalid oem parameters detected, falling back to firmware\n", i);
 472                         devm_kfree(&pdev->dev, orom);
 473                         orom = NULL;
 474                         break;
 475                 }
 476         }
 477
 478         if (!orom) {
 479                 source = "(firmware)";
 480                 orom = isci_request_firmware(pdev, fw);
 481                 if (!orom) {
 482                         /* TODO convert this to WARN_TAINT_ONCE once the
 483                          * orom/efi parameter support is widely available
 484                          */
 485                         dev_warn(&pdev->dev,
 486                                  "Loading user firmware failed, using default "
 487                                  "values\n");
 488                         dev_warn(&pdev->dev,
 489                                  "Default OEM configuration being used: 4 "
 490                                  "narrow ports, and default SAS Addresses\n");
 491                 }
 492         }
 493
 494         if (orom)
 495                 dev_info(&pdev->dev,
 496                          "OEM SAS parameters (version: %u.%u) loaded %s\n",
 497                          (orom->hdr.version & 0xf0) >> 4,
 498                          (orom->hdr.version & 0xf), source);
 499
 500         pci_info->orom = orom;
 501
 502         err = isci_pci_init(pdev);
 503         if (err)
 504                 return err;
 505
 506         for (i = 0; i < num_controllers(pdev); i++) {
 507                 struct isci_host *h = isci_host_alloc(pdev, i);
 508
 509                 if (!h) {
 510                         err = -ENOMEM;
 511                         goto err_host_alloc;
 512                 }
 513                 pci_info->hosts[i] = h;
 514         }
 515
 516         err = isci_setup_interrupts(pdev);
 517         if (err)
 518                 goto err_host_alloc;
 519
 520         for_each_isci_host(i, isci_host, pdev)
 521                 scsi_scan_host(isci_host->shost);
 522
 523         return 0;
 524
 525  err_host_alloc:
 526         for_each_isci_host(i, isci_host, pdev)
 527                 isci_unregister(isci_host);
 528         return err;
 529 }
 530
 531 static void __devexit isci_pci_remove(struct pci_dev *pdev)
 532 {
 533         struct isci_host *ihost;
 534         int i;
 535
 536         for_each_isci_host(i, ihost, pdev) {
 537                 isci_unregister(ihost);
 538                 isci_host_deinit(ihost);
 539                 sci_controller_disable_interrupts(ihost);
 540         }
 541 }
 542
 543 static struct pci_driver isci_pci_driver = {
 544         .name           = DRV_NAME,
 545         .id_table       = isci_id_table,
 546         .probe          = isci_pci_probe,
 547         .remove         = __devexit_p(isci_pci_remove),
 548 };
 549
 550 static __init int isci_init(void)
 551 {
 552         int err;
 553
 554         pr_info("%s: Intel(R) C600 SAS Controller Driver - version %s\n",
 555                 DRV_NAME, DRV_VERSION);
 556
 557         isci_transport_template = sas_domain_attach_transport(&isci_transport_ops);
 558         if (!isci_transport_template)
 559                 return -ENOMEM;
 560
 561         err = pci_register_driver(&isci_pci_driver);
 562         if (err)
 563                 sas_release_transport(isci_transport_template);
 564
 565         return err;
 566 }
 567
 568 static __exit void isci_exit(void)
 569 {
 570         pci_unregister_driver(&isci_pci_driver);
 571         sas_release_transport(isci_transport_template);
 572 }
 573
 574 MODULE_LICENSE("Dual BSD/GPL");
 575 MODULE_FIRMWARE(ISCI_FW_NAME);
 576 module_init(isci_init);
 577 module_exit(isci_exit);