drivers/scsi/esas2r/esas2r_init.c

   1 /*
   2  *  linux/drivers/scsi/esas2r/esas2r_init.c
   3  *      For use with ATTO ExpressSAS R6xx SAS/SATA RAID controllers
   4  *
   5  *  Copyright (c) 2001-2013 ATTO Technology, Inc.
   6  *  (mailto:linuxdrivers@attotech.com)mpt3sas/mpt3sas_trigger_diag.
   7  *
   8  * This program is free software; you can redistribute it and/or
   9  * modify it under the terms of the GNU General Public License
  10  * as published by the Free Software Foundation; either version 2
  11  * of the License, or (at your option) any later version.
  12  *
  13  * This program is distributed in the hope that it will be useful,
  14  * but WITHOUT ANY WARRANTY; without even the implied warranty of
  15  * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
  16  * GNU General Public License for more details.
  17  *
  18  * NO WARRANTY
  19  * THE PROGRAM IS PROVIDED ON AN "AS IS" BASIS, WITHOUT WARRANTIES OR
  20  * CONDITIONS OF ANY KIND, EITHER EXPRESS OR IMPLIED INCLUDING, WITHOUT
  21  * LIMITATION, ANY WARRANTIES OR CONDITIONS OF TITLE, NON-INFRINGEMENT,
  22  * MERCHANTABILITY OR FITNESS FOR A PARTICULAR PURPOSE. Each Recipient is
  23  * solely responsible for determining the appropriateness of using and
  24  * distributing the Program and assumes all risks associated with its
  25  * exercise of rights under this Agreement, including but not limited to
  26  * the risks and costs of program errors, damage to or loss of data,
  27  * programs or equipment, and unavailability or interruption of operations.
  28  *
  29  * DISCLAIMER OF LIABILITY
  30  * NEITHER RECIPIENT NOR ANY CONTRIBUTORS SHALL HAVE ANY LIABILITY FOR ANY
  31  * DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
  32  * DAMAGES (INCLUDING WITHOUT LIMITATION LOST PROFITS), HOWEVER CAUSED AND
  33  * ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR
  34  * TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE
  35  * USE OR DISTRIBUTION OF THE PROGRAM OR THE EXERCISE OF ANY RIGHTS GRANTED
  36  * HEREUNDER, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGES
  37  *
  38  * You should have received a copy of the GNU General Public License
  39  * along with this program; if not, write to the Free Software
  40  * Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA  02110-1301,
  41  * USA.
  42  */
  43
  44 #include "esas2r.h"
  45
  46 static bool esas2r_initmem_alloc(struct esas2r_adapter *a,
  47                                  struct esas2r_mem_desc *mem_desc,
  48                                  u32 align)
  49 {
  50         mem_desc->esas2r_param = mem_desc->size + align;
  51         mem_desc->virt_addr = NULL;
  52         mem_desc->phys_addr = 0;
  53         mem_desc->esas2r_data = dma_alloc_coherent(&a->pcid->dev,
  54                                                    (size_t)mem_desc->
  55                                                    esas2r_param,
  56                                                    (dma_addr_t *)&mem_desc->
  57                                                    phys_addr,
  58                                                    GFP_KERNEL);
  59
  60         if (mem_desc->esas2r_data == NULL) {
  61                 esas2r_log(ESAS2R_LOG_CRIT,
  62                            "failed to allocate %lu bytes of consistent memory!",
  63                            (long
  64                             unsigned
  65                             int)mem_desc->esas2r_param);
  66                 return false;
  67         }
  68
  69         mem_desc->virt_addr = PTR_ALIGN(mem_desc->esas2r_data, align);
  70         mem_desc->phys_addr = ALIGN(mem_desc->phys_addr, align);
  71         memset(mem_desc->virt_addr, 0, mem_desc->size);
  72         return true;
  73 }
  74
  75 static void esas2r_initmem_free(struct esas2r_adapter *a,
  76                                 struct esas2r_mem_desc *mem_desc)
  77 {
  78         if (mem_desc->virt_addr == NULL)
  79                 return;
  80
  81         /*
  82          * Careful!  phys_addr and virt_addr may have been adjusted from the
  83          * original allocation in order to return the desired alignment.  That
  84          * means we have to use the original address (in esas2r_data) and size
  85          * (esas2r_param) and calculate the original physical address based on
  86          * the difference between the requested and actual allocation size.
  87          */
  88         if (mem_desc->phys_addr) {
  89                 int unalign = ((u8 *)mem_desc->virt_addr) -
  90                               ((u8 *)mem_desc->esas2r_data);
  91
  92                 dma_free_coherent(&a->pcid->dev,
  93                                   (size_t)mem_desc->esas2r_param,
  94                                   mem_desc->esas2r_data,
  95                                   (dma_addr_t)(mem_desc->phys_addr - unalign));
  96         } else {
  97                 kfree(mem_desc->esas2r_data);
  98         }
  99
 100         mem_desc->virt_addr = NULL;
 101 }
 102
 103 static bool alloc_vda_req(struct esas2r_adapter *a,
 104                           struct esas2r_request *rq)
 105 {
 106         struct esas2r_mem_desc *memdesc = kzalloc(
 107                 sizeof(struct esas2r_mem_desc), GFP_KERNEL);
 108
 109         if (memdesc == NULL) {
 110                 esas2r_hdebug("could not alloc mem for vda request memdesc\n");
 111                 return false;
 112         }
 113
 114         memdesc->size = sizeof(union atto_vda_req) +
 115                         ESAS2R_DATA_BUF_LEN;
 116
 117         if (!esas2r_initmem_alloc(a, memdesc, 256)) {
 118                 esas2r_hdebug("could not alloc mem for vda request\n");
 119                 kfree(memdesc);
 120                 return false;
 121         }
 122
 123         a->num_vrqs++;
 124         list_add(&memdesc->next_desc, &a->vrq_mds_head);
 125
 126         rq->vrq_md = memdesc;
 127         rq->vrq = (union atto_vda_req *)memdesc->virt_addr;
 128         rq->vrq->scsi.handle = a->num_vrqs;
 129
 130         return true;
 131 }
 132
 133 static void esas2r_unmap_regions(struct esas2r_adapter *a)
 134 {
 135         if (a->regs)
 136                 iounmap((void __iomem *)a->regs);
 137
 138         a->regs = NULL;
 139
 140         pci_release_region(a->pcid, 2);
 141
 142         if (a->data_window)
 143                 iounmap((void __iomem *)a->data_window);
 144
 145         a->data_window = NULL;
 146
 147         pci_release_region(a->pcid, 0);
 148 }
 149
 150 static int esas2r_map_regions(struct esas2r_adapter *a)
 151 {
 152         int error;
 153
 154         a->regs = NULL;
 155         a->data_window = NULL;
 156
 157         error = pci_request_region(a->pcid, 2, a->name);
 158         if (error != 0) {
 159                 esas2r_log(ESAS2R_LOG_CRIT,
 160                            "pci_request_region(2) failed, error %d",
 161                            error);
 162
 163                 return error;
 164         }
 165
 166         a->regs = (void __force *)ioremap(pci_resource_start(a->pcid, 2),
 167                                           pci_resource_len(a->pcid, 2));
 168         if (a->regs == NULL) {
 169                 esas2r_log(ESAS2R_LOG_CRIT,
 170                            "ioremap failed for regs mem region\n");
 171                 pci_release_region(a->pcid, 2);
 172                 return -EFAULT;
 173         }
 174
 175         error = pci_request_region(a->pcid, 0, a->name);
 176         if (error != 0) {
 177                 esas2r_log(ESAS2R_LOG_CRIT,
 178                            "pci_request_region(2) failed, error %d",
 179                            error);
 180                 esas2r_unmap_regions(a);
 181                 return error;
 182         }
 183
 184         a->data_window = (void __force *)ioremap(pci_resource_start(a->pcid,
 185                                                                     0),
 186                                                  pci_resource_len(a->pcid, 0));
 187         if (a->data_window == NULL) {
 188                 esas2r_log(ESAS2R_LOG_CRIT,
 189                            "ioremap failed for data_window mem region\n");
 190                 esas2r_unmap_regions(a);
 191                 return -EFAULT;
 192         }
 193
 194         return 0;
 195 }
 196
 197 static void esas2r_setup_interrupts(struct esas2r_adapter *a, int intr_mode)
 198 {
 199         int i;
 200
 201         /* Set up interrupt mode based on the requested value */
 202         switch (intr_mode) {
 203         case INTR_MODE_LEGACY:
 204 use_legacy_interrupts:
 205                 a->intr_mode = INTR_MODE_LEGACY;
 206                 break;
 207
 208         case INTR_MODE_MSI:
 209                 i = pci_enable_msi(a->pcid);
 210                 if (i != 0) {
 211                         esas2r_log(ESAS2R_LOG_WARN,
 212                                    "failed to enable MSI for adapter %d, "
 213                                    "falling back to legacy interrupts "
 214                                    "(err=%d)", a->index,
 215                                    i);
 216                         goto use_legacy_interrupts;
 217                 }
 218                 a->intr_mode = INTR_MODE_MSI;
 219                 set_bit(AF2_MSI_ENABLED, &a->flags2);
 220                 break;
 221
 222
 223         default:
 224                 esas2r_log(ESAS2R_LOG_WARN,
 225                            "unknown interrupt_mode %d requested, "
 226                            "falling back to legacy interrupt",
 227                            interrupt_mode);
 228                 goto use_legacy_interrupts;
 229         }
 230 }
 231
 232 static void esas2r_claim_interrupts(struct esas2r_adapter *a)
 233 {
 234         unsigned long flags = 0;
 235
 236         if (a->intr_mode == INTR_MODE_LEGACY)
 237                 flags |= IRQF_SHARED;
 238
 239         esas2r_log(ESAS2R_LOG_INFO,
 240                    "esas2r_claim_interrupts irq=%d (%p, %s, %lx)",
 241                    a->pcid->irq, a, a->name, flags);
 242
 243         if (request_irq(a->pcid->irq,
 244                         (a->intr_mode ==
 245                          INTR_MODE_LEGACY) ? esas2r_interrupt :
 246                         esas2r_msi_interrupt,
 247                         flags,
 248                         a->name,
 249                         a)) {
 250                 esas2r_log(ESAS2R_LOG_CRIT, "unable to request IRQ %02X",
 251                            a->pcid->irq);
 252                 return;
 253         }
 254
 255         set_bit(AF2_IRQ_CLAIMED, &a->flags2);
 256         esas2r_log(ESAS2R_LOG_INFO,
 257                    "claimed IRQ %d flags: 0x%lx",
 258                    a->pcid->irq, flags);
 259 }
 260
 261 int esas2r_init_adapter(struct Scsi_Host *host, struct pci_dev *pcid,
 262                         int index)
 263 {
 264         struct esas2r_adapter *a;
 265         u64 bus_addr = 0;
 266         int i;
 267         void *next_uncached;
 268         struct esas2r_request *first_request, *last_request;
 269
 270         if (index >= MAX_ADAPTERS) {
 271                 esas2r_log(ESAS2R_LOG_CRIT,
 272                            "tried to init invalid adapter index %u!",
 273                            index);
 274                 return 0;
 275         }
 276
 277         if (esas2r_adapters[index]) {
 278                 esas2r_log(ESAS2R_LOG_CRIT,
 279                            "tried to init existing adapter index %u!",
 280                            index);
 281                 return 0;
 282         }
 283
 284         a = (struct esas2r_adapter *)host->hostdata;
 285         memset(a, 0, sizeof(struct esas2r_adapter));
 286         a->pcid = pcid;
 287         a->host = host;
 288
 289         if (sizeof(dma_addr_t) > 4) {
 290                 const uint64_t required_mask = dma_get_required_mask
 291                                                        (&pcid->dev);
 292                 if (required_mask > DMA_BIT_MASK(32)
 293                     && !pci_set_dma_mask(pcid, DMA_BIT_MASK(64))
 294                     && !pci_set_consistent_dma_mask(pcid,
 295                                                     DMA_BIT_MASK(64))) {
 296                         esas2r_log_dev(ESAS2R_LOG_INFO,
 297                                        &(a->pcid->dev),
 298                                        "64-bit PCI addressing enabled\n");
 299                 } else if (!pci_set_dma_mask(pcid, DMA_BIT_MASK(32))
 300                            && !pci_set_consistent_dma_mask(pcid,
 301                                                            DMA_BIT_MASK(32))) {
 302                         esas2r_log_dev(ESAS2R_LOG_INFO,
 303                                        &(a->pcid->dev),
 304                                        "32-bit PCI addressing enabled\n");
 305                 } else {
 306                         esas2r_log(ESAS2R_LOG_CRIT,
 307                                    "failed to set DMA mask");
 308                         esas2r_kill_adapter(index);
 309                         return 0;
 310                 }
 311         } else {
 312                 if (!pci_set_dma_mask(pcid, DMA_BIT_MASK(32))
 313                     && !pci_set_consistent_dma_mask(pcid,
 314                                                     DMA_BIT_MASK(32))) {
 315                         esas2r_log_dev(ESAS2R_LOG_INFO,
 316                                        &(a->pcid->dev),
 317                                        "32-bit PCI addressing enabled\n");
 318                 } else {
 319                         esas2r_log(ESAS2R_LOG_CRIT,
 320                                    "failed to set DMA mask");
 321                         esas2r_kill_adapter(index);
 322                         return 0;
 323                 }
 324         }
 325         esas2r_adapters[index] = a;
 326         sprintf(a->name, ESAS2R_DRVR_NAME "_%02d", index);
 327         esas2r_debug("new adapter %p, name %s", a, a->name);
 328         spin_lock_init(&a->request_lock);
 329         spin_lock_init(&a->fw_event_lock);
 330         mutex_init(&a->fm_api_mutex);
 331         mutex_init(&a->fs_api_mutex);
 332         sema_init(&a->nvram_semaphore, 1);
 333
 334         esas2r_fw_event_off(a);
 335         snprintf(a->fw_event_q_name, ESAS2R_KOBJ_NAME_LEN, "esas2r/%d",
 336                  a->index);
 337         a->fw_event_q = create_singlethread_workqueue(a->fw_event_q_name);
 338
 339         init_waitqueue_head(&a->buffered_ioctl_waiter);
 340         init_waitqueue_head(&a->nvram_waiter);
 341         init_waitqueue_head(&a->fm_api_waiter);
 342         init_waitqueue_head(&a->fs_api_waiter);
 343         init_waitqueue_head(&a->vda_waiter);
 344
 345         INIT_LIST_HEAD(&a->general_req.req_list);
 346         INIT_LIST_HEAD(&a->active_list);
 347         INIT_LIST_HEAD(&a->defer_list);
 348         INIT_LIST_HEAD(&a->free_sg_list_head);
 349         INIT_LIST_HEAD(&a->avail_request);
 350         INIT_LIST_HEAD(&a->vrq_mds_head);
 351         INIT_LIST_HEAD(&a->fw_event_list);
 352
 353         first_request = (struct esas2r_request *)((u8 *)(a + 1));
 354
 355         for (last_request = first_request, i = 1; i < num_requests;
 356              last_request++, i++) {
 357                 INIT_LIST_HEAD(&last_request->req_list);
 358                 list_add_tail(&last_request->comp_list, &a->avail_request);
 359                 if (!alloc_vda_req(a, last_request)) {
 360                         esas2r_log(ESAS2R_LOG_CRIT,
 361                                    "failed to allocate a VDA request!");
 362                         esas2r_kill_adapter(index);
 363                         return 0;
 364                 }
 365         }
 366
 367         esas2r_debug("requests: %p to %p (%d, %d)", first_request,
 368                      last_request,
 369                      sizeof(*first_request),
 370                      num_requests);
 371
 372         if (esas2r_map_regions(a) != 0) {
 373                 esas2r_log(ESAS2R_LOG_CRIT, "could not map PCI regions!");
 374                 esas2r_kill_adapter(index);
 375                 return 0;
 376         }
 377
 378         a->index = index;
 379
 380         /* interrupts will be disabled until we are done with init */
 381         atomic_inc(&a->dis_ints_cnt);
 382         atomic_inc(&a->disable_cnt);
 383         set_bit(AF_CHPRST_PENDING, &a->flags);
 384         set_bit(AF_DISC_PENDING, &a->flags);
 385         set_bit(AF_FIRST_INIT, &a->flags);
 386         set_bit(AF_LEGACY_SGE_MODE, &a->flags);
 387
 388         a->init_msg = ESAS2R_INIT_MSG_START;
 389         a->max_vdareq_size = 128;
 390         a->build_sgl = esas2r_build_sg_list_sge;
 391
 392         esas2r_setup_interrupts(a, interrupt_mode);
 393
 394         a->uncached_size = esas2r_get_uncached_size(a);
 395         a->uncached = dma_alloc_coherent(&pcid->dev,
 396                                          (size_t)a->uncached_size,
 397                                          (dma_addr_t *)&bus_addr,
 398                                          GFP_KERNEL);
 399         if (a->uncached == NULL) {
 400                 esas2r_log(ESAS2R_LOG_CRIT,
 401                            "failed to allocate %d bytes of consistent memory!",
 402                            a->uncached_size);
 403                 esas2r_kill_adapter(index);
 404                 return 0;
 405         }
 406
 407         a->uncached_phys = bus_addr;
 408
 409         esas2r_debug("%d bytes uncached memory allocated @ %p (%x:%x)",
 410                      a->uncached_size,
 411                      a->uncached,
 412                      upper_32_bits(bus_addr),
 413                      lower_32_bits(bus_addr));
 414         memset(a->uncached, 0, a->uncached_size);
 415         next_uncached = a->uncached;
 416
 417         if (!esas2r_init_adapter_struct(a,
 418                                         &next_uncached)) {
 419                 esas2r_log(ESAS2R_LOG_CRIT,
 420                            "failed to initialize adapter structure (2)!");
 421                 esas2r_kill_adapter(index);
 422                 return 0;
 423         }
 424
 425         tasklet_init(&a->tasklet,
 426                      esas2r_adapter_tasklet,
 427                      (unsigned long)a);
 428
 429         /*
 430          * Disable chip interrupts to prevent spurious interrupts
 431          * until we claim the IRQ.
 432          */
 433         esas2r_disable_chip_interrupts(a);
 434         esas2r_check_adapter(a);
 435
 436         if (!esas2r_init_adapter_hw(a, true))
 437                 esas2r_log(ESAS2R_LOG_CRIT, "failed to initialize hardware!");
 438         else
 439                 esas2r_debug("esas2r_init_adapter ok");
 440
 441         esas2r_claim_interrupts(a);
 442
 443         if (test_bit(AF2_IRQ_CLAIMED, &a->flags2))
 444                 esas2r_enable_chip_interrupts(a);
 445
 446         set_bit(AF2_INIT_DONE, &a->flags2);
 447         if (!test_bit(AF_DEGRADED_MODE, &a->flags))
 448                 esas2r_kickoff_timer(a);
 449         esas2r_debug("esas2r_init_adapter done for %p (%d)",
 450                      a, a->disable_cnt);
 451
 452         return 1;
 453 }
 454
 455 static void esas2r_adapter_power_down(struct esas2r_adapter *a,
 456                                       int power_management)
 457 {
 458         struct esas2r_mem_desc *memdesc, *next;
 459
 460         if ((test_bit(AF2_INIT_DONE, &a->flags2))
 461             &&  (!test_bit(AF_DEGRADED_MODE, &a->flags))) {
 462                 if (!power_management) {
 463                         del_timer_sync(&a->timer);
 464                         tasklet_kill(&a->tasklet);
 465                 }
 466                 esas2r_power_down(a);
 467
 468                 /*
 469                  * There are versions of firmware that do not handle the sync
 470                  * cache command correctly.  Stall here to ensure that the
 471                  * cache is lazily flushed.
 472                  */
 473                 mdelay(500);
 474                 esas2r_debug("chip halted");
 475         }
 476
 477         /* Remove sysfs binary files */
 478         if (a->sysfs_fw_created) {
 479                 sysfs_remove_bin_file(&a->host->shost_dev.kobj, &bin_attr_fw);
 480                 a->sysfs_fw_created = 0;
 481         }
 482
 483         if (a->sysfs_fs_created) {
 484                 sysfs_remove_bin_file(&a->host->shost_dev.kobj, &bin_attr_fs);
 485                 a->sysfs_fs_created = 0;
 486         }
 487
 488         if (a->sysfs_vda_created) {
 489                 sysfs_remove_bin_file(&a->host->shost_dev.kobj, &bin_attr_vda);
 490                 a->sysfs_vda_created = 0;
 491         }
 492
 493         if (a->sysfs_hw_created) {
 494                 sysfs_remove_bin_file(&a->host->shost_dev.kobj, &bin_attr_hw);
 495                 a->sysfs_hw_created = 0;
 496         }
 497
 498         if (a->sysfs_live_nvram_created) {
 499                 sysfs_remove_bin_file(&a->host->shost_dev.kobj,
 500                                       &bin_attr_live_nvram);
 501                 a->sysfs_live_nvram_created = 0;
 502         }
 503
 504         if (a->sysfs_default_nvram_created) {
 505                 sysfs_remove_bin_file(&a->host->shost_dev.kobj,
 506                                       &bin_attr_default_nvram);
 507                 a->sysfs_default_nvram_created = 0;
 508         }
 509
 510         /* Clean up interrupts */
 511         if (test_bit(AF2_IRQ_CLAIMED, &a->flags2)) {
 512                 esas2r_log_dev(ESAS2R_LOG_INFO,
 513                                &(a->pcid->dev),
 514                                "free_irq(%d) called", a->pcid->irq);
 515
 516                 free_irq(a->pcid->irq, a);
 517                 esas2r_debug("IRQ released");
 518                 clear_bit(AF2_IRQ_CLAIMED, &a->flags2);
 519         }
 520
 521         if (test_bit(AF2_MSI_ENABLED, &a->flags2)) {
 522                 pci_disable_msi(a->pcid);
 523                 clear_bit(AF2_MSI_ENABLED, &a->flags2);
 524                 esas2r_debug("MSI disabled");
 525         }
 526
 527         if (a->inbound_list_md.virt_addr)
 528                 esas2r_initmem_free(a, &a->inbound_list_md);
 529
 530         if (a->outbound_list_md.virt_addr)
 531                 esas2r_initmem_free(a, &a->outbound_list_md);
 532
 533         list_for_each_entry_safe(memdesc, next, &a->free_sg_list_head,
 534                                  next_desc) {
 535                 esas2r_initmem_free(a, memdesc);
 536         }
 537
 538         /* Following frees everything allocated via alloc_vda_req */
 539         list_for_each_entry_safe(memdesc, next, &a->vrq_mds_head, next_desc) {
 540                 esas2r_initmem_free(a, memdesc);
 541                 list_del(&memdesc->next_desc);
 542                 kfree(memdesc);
 543         }
 544
 545         kfree(a->first_ae_req);
 546         a->first_ae_req = NULL;
 547
 548         kfree(a->sg_list_mds);
 549         a->sg_list_mds = NULL;
 550
 551         kfree(a->req_table);
 552         a->req_table = NULL;
 553
 554         if (a->regs) {
 555                 esas2r_unmap_regions(a);
 556                 a->regs = NULL;
 557                 a->data_window = NULL;
 558                 esas2r_debug("regions unmapped");
 559         }
 560 }
 561
 562 /* Release/free allocated resources for specified adapters. */
 563 void esas2r_kill_adapter(int i)
 564 {
 565         struct esas2r_adapter *a = esas2r_adapters[i];
 566
 567         if (a) {
 568                 unsigned long flags;
 569                 struct workqueue_struct *wq;
 570                 esas2r_debug("killing adapter %p [%d] ", a, i);
 571                 esas2r_fw_event_off(a);
 572                 esas2r_adapter_power_down(a, 0);
 573                 if (esas2r_buffered_ioctl &&
 574                     (a->pcid == esas2r_buffered_ioctl_pcid)) {
 575                         dma_free_coherent(&a->pcid->dev,
 576                                           (size_t)esas2r_buffered_ioctl_size,
 577                                           esas2r_buffered_ioctl,
 578                                           esas2r_buffered_ioctl_addr);
 579                         esas2r_buffered_ioctl = NULL;
 580                 }
 581
 582                 if (a->vda_buffer) {
 583                         dma_free_coherent(&a->pcid->dev,
 584                                           (size_t)VDA_MAX_BUFFER_SIZE,
 585                                           a->vda_buffer,
 586                                           (dma_addr_t)a->ppvda_buffer);
 587                         a->vda_buffer = NULL;
 588                 }
 589                 if (a->fs_api_buffer) {
 590                         dma_free_coherent(&a->pcid->dev,
 591                                           (size_t)a->fs_api_buffer_size,
 592                                           a->fs_api_buffer,
 593                                           (dma_addr_t)a->ppfs_api_buffer);
 594                         a->fs_api_buffer = NULL;
 595                 }
 596
 597                 kfree(a->local_atto_ioctl);
 598                 a->local_atto_ioctl = NULL;
 599
 600                 spin_lock_irqsave(&a->fw_event_lock, flags);
 601                 wq = a->fw_event_q;
 602                 a->fw_event_q = NULL;
 603                 spin_unlock_irqrestore(&a->fw_event_lock, flags);
 604                 if (wq)
 605                         destroy_workqueue(wq);
 606
 607                 if (a->uncached) {
 608                         dma_free_coherent(&a->pcid->dev,
 609                                           (size_t)a->uncached_size,
 610                                           a->uncached,
 611                                           (dma_addr_t)a->uncached_phys);
 612                         a->uncached = NULL;
 613                         esas2r_debug("uncached area freed");
 614                 }
 615
 616                 esas2r_log_dev(ESAS2R_LOG_INFO,
 617                                &(a->pcid->dev),
 618                                "pci_disable_device() called.  msix_enabled: %d "
 619                                "msi_enabled: %d irq: %d pin: %d",
 620                                a->pcid->msix_enabled,
 621                                a->pcid->msi_enabled,
 622                                a->pcid->irq,
 623                                a->pcid->pin);
 624
 625                 esas2r_log_dev(ESAS2R_LOG_INFO,
 626                                &(a->pcid->dev),
 627                                "before pci_disable_device() enable_cnt: %d",
 628                                a->pcid->enable_cnt.counter);
 629
 630                 pci_disable_device(a->pcid);
 631                 esas2r_log_dev(ESAS2R_LOG_INFO,
 632                                &(a->pcid->dev),
 633                                "after pci_disable_device() enable_cnt: %d",
 634                                a->pcid->enable_cnt.counter);
 635
 636                 esas2r_log_dev(ESAS2R_LOG_INFO,
 637                                &(a->pcid->dev),
 638                                "pci_set_drv_data(%p, NULL) called",
 639                                a->pcid);
 640
 641                 pci_set_drvdata(a->pcid, NULL);
 642                 esas2r_adapters[i] = NULL;
 643
 644                 if (test_bit(AF2_INIT_DONE, &a->flags2)) {
 645                         clear_bit(AF2_INIT_DONE, &a->flags2);
 646
 647                         set_bit(AF_DEGRADED_MODE, &a->flags);
 648
 649                         esas2r_log_dev(ESAS2R_LOG_INFO,
 650                                        &(a->host->shost_gendev),
 651                                        "scsi_remove_host() called");
 652
 653                         scsi_remove_host(a->host);
 654
 655                         esas2r_log_dev(ESAS2R_LOG_INFO,
 656                                        &(a->host->shost_gendev),
 657                                        "scsi_host_put() called");
 658
 659                         scsi_host_put(a->host);
 660                 }
 661         }
 662 }
 663
 664 int esas2r_suspend(struct pci_dev *pdev, pm_message_t state)
 665 {
 666         struct Scsi_Host *host = pci_get_drvdata(pdev);
 667         u32 device_state;
 668         struct esas2r_adapter *a = (struct esas2r_adapter *)host->hostdata;
 669
 670         esas2r_log_dev(ESAS2R_LOG_INFO, &(pdev->dev), "suspending adapter()");
 671         if (!a)
 672                 return -ENODEV;
 673
 674         esas2r_adapter_power_down(a, 1);
 675         device_state = pci_choose_state(pdev, state);
 676         esas2r_log_dev(ESAS2R_LOG_INFO, &(pdev->dev),
 677                        "pci_save_state() called");
 678         pci_save_state(pdev);
 679         esas2r_log_dev(ESAS2R_LOG_INFO, &(pdev->dev),
 680                        "pci_disable_device() called");
 681         pci_disable_device(pdev);
 682         esas2r_log_dev(ESAS2R_LOG_INFO, &(pdev->dev),
 683                        "pci_set_power_state() called");
 684         pci_set_power_state(pdev, device_state);
 685         esas2r_log_dev(ESAS2R_LOG_INFO, &(pdev->dev), "esas2r_suspend(): 0");
 686         return 0;
 687 }
 688
 689 int esas2r_resume(struct pci_dev *pdev)
 690 {
 691         struct Scsi_Host *host = pci_get_drvdata(pdev);
 692         struct esas2r_adapter *a = (struct esas2r_adapter *)host->hostdata;
 693         int rez;
 694
 695         esas2r_log_dev(ESAS2R_LOG_INFO, &(pdev->dev), "resuming adapter()");
 696         esas2r_log_dev(ESAS2R_LOG_INFO, &(pdev->dev),
 697                        "pci_set_power_state(PCI_D0) "
 698                        "called");
 699         pci_set_power_state(pdev, PCI_D0);
 700         esas2r_log_dev(ESAS2R_LOG_INFO, &(pdev->dev),
 701                        "pci_enable_wake(PCI_D0, 0) "
 702                        "called");
 703         pci_enable_wake(pdev, PCI_D0, 0);
 704         esas2r_log_dev(ESAS2R_LOG_INFO, &(pdev->dev),
 705                        "pci_restore_state() called");
 706         pci_restore_state(pdev);
 707         esas2r_log_dev(ESAS2R_LOG_INFO, &(pdev->dev),
 708                        "pci_enable_device() called");
 709         rez = pci_enable_device(pdev);
 710         pci_set_master(pdev);
 711
 712         if (!a) {
 713                 rez = -ENODEV;
 714                 goto error_exit;
 715         }
 716
 717         if (esas2r_map_regions(a) != 0) {
 718                 esas2r_log(ESAS2R_LOG_CRIT, "could not re-map PCI regions!");
 719                 rez = -ENOMEM;
 720                 goto error_exit;
 721         }
 722
 723         /* Set up interupt mode */
 724         esas2r_setup_interrupts(a, a->intr_mode);
 725
 726         /*
 727          * Disable chip interrupts to prevent spurious interrupts until we
 728          * claim the IRQ.
 729          */
 730         esas2r_disable_chip_interrupts(a);
 731         if (!esas2r_power_up(a, true)) {
 732                 esas2r_debug("yikes, esas2r_power_up failed");
 733                 rez = -ENOMEM;
 734                 goto error_exit;
 735         }
 736
 737         esas2r_claim_interrupts(a);
 738
 739         if (test_bit(AF2_IRQ_CLAIMED, &a->flags2)) {
 740                 /*
 741                  * Now that system interrupt(s) are claimed, we can enable
 742                  * chip interrupts.
 743                  */
 744                 esas2r_enable_chip_interrupts(a);
 745                 esas2r_kickoff_timer(a);
 746         } else {
 747                 esas2r_debug("yikes, unable to claim IRQ");
 748                 esas2r_log(ESAS2R_LOG_CRIT, "could not re-claim IRQ!");
 749                 rez = -ENOMEM;
 750                 goto error_exit;
 751         }
 752
 753 error_exit:
 754         esas2r_log_dev(ESAS2R_LOG_CRIT, &(pdev->dev), "esas2r_resume(): %d",
 755                        rez);
 756         return rez;
 757 }
 758
 759 bool esas2r_set_degraded_mode(struct esas2r_adapter *a, char *error_str)
 760 {
 761         set_bit(AF_DEGRADED_MODE, &a->flags);
 762         esas2r_log(ESAS2R_LOG_CRIT,
 763                    "setting adapter to degraded mode: %s\n", error_str);
 764         return false;
 765 }
 766
 767 u32 esas2r_get_uncached_size(struct esas2r_adapter *a)
 768 {
 769         return sizeof(struct esas2r_sas_nvram)
 770                + ALIGN(ESAS2R_DISC_BUF_LEN, 8)
 771                + ALIGN(sizeof(u32), 8) /* outbound list copy pointer */
 772                + 8
 773                + (num_sg_lists * (u16)sgl_page_size)
 774                + ALIGN((num_requests + num_ae_requests + 1 +
 775                         ESAS2R_LIST_EXTRA) *
 776                        sizeof(struct esas2r_inbound_list_source_entry),
 777                        8)
 778                + ALIGN((num_requests + num_ae_requests + 1 +
 779                         ESAS2R_LIST_EXTRA) *
 780                        sizeof(struct atto_vda_ob_rsp), 8)
 781                + 256; /* VDA request and buffer align */
 782 }
 783
 784 static void esas2r_init_pci_cfg_space(struct esas2r_adapter *a)
 785 {
 786         int pcie_cap_reg;
 787
 788         pcie_cap_reg = pci_find_capability(a->pcid, PCI_CAP_ID_EXP);
 789         if (pcie_cap_reg) {
 790                 u16 devcontrol;
 791
 792                 pci_read_config_word(a->pcid, pcie_cap_reg + PCI_EXP_DEVCTL,
 793                                      &devcontrol);
 794
 795                 if ((devcontrol & PCI_EXP_DEVCTL_READRQ) >
 796                      PCI_EXP_DEVCTL_READRQ_512B) {
 797                         esas2r_log(ESAS2R_LOG_INFO,
 798                                    "max read request size > 512B");
 799
 800                         devcontrol &= ~PCI_EXP_DEVCTL_READRQ;
 801                         devcontrol |= PCI_EXP_DEVCTL_READRQ_512B;
 802                         pci_write_config_word(a->pcid,
 803                                               pcie_cap_reg + PCI_EXP_DEVCTL,
 804                                               devcontrol);
 805                 }
 806         }
 807 }
 808
 809 /*
 810  * Determine the organization of the uncached data area and
 811  * finish initializing the adapter structure
 812  */
 813 bool esas2r_init_adapter_struct(struct esas2r_adapter *a,
 814                                 void **uncached_area)
 815 {
 816         u32 i;
 817         u8 *high;
 818         struct esas2r_inbound_list_source_entry *element;
 819         struct esas2r_request *rq;
 820         struct esas2r_mem_desc *sgl;
 821
 822         spin_lock_init(&a->sg_list_lock);
 823         spin_lock_init(&a->mem_lock);
 824         spin_lock_init(&a->queue_lock);
 825
 826         a->targetdb_end = &a->targetdb[ESAS2R_MAX_TARGETS];
 827
 828         if (!alloc_vda_req(a, &a->general_req)) {
 829                 esas2r_hdebug(
 830                         "failed to allocate a VDA request for the general req!");
 831                 return false;
 832         }
 833
 834         /* allocate requests for asynchronous events */
 835         a->first_ae_req =
 836                 kcalloc(num_ae_requests, sizeof(struct esas2r_request),
 837                         GFP_KERNEL);
 838
 839         if (a->first_ae_req == NULL) {
 840                 esas2r_log(ESAS2R_LOG_CRIT,
 841                            "failed to allocate memory for asynchronous events");
 842                 return false;
 843         }
 844
 845         /* allocate the S/G list memory descriptors */
 846         a->sg_list_mds = kcalloc(num_sg_lists, sizeof(struct esas2r_mem_desc),
 847                                  GFP_KERNEL);
 848
 849         if (a->sg_list_mds == NULL) {
 850                 esas2r_log(ESAS2R_LOG_CRIT,
 851                            "failed to allocate memory for s/g list descriptors");
 852                 return false;
 853         }
 854
 855         /* allocate the request table */
 856         a->req_table =
 857                 kcalloc(num_requests + num_ae_requests + 1,
 858                         sizeof(struct esas2r_request *),
 859                         GFP_KERNEL);
 860
 861         if (a->req_table == NULL) {
 862                 esas2r_log(ESAS2R_LOG_CRIT,
 863                            "failed to allocate memory for the request table");
 864                 return false;
 865         }
 866
 867         /* initialize PCI configuration space */
 868         esas2r_init_pci_cfg_space(a);
 869
 870         /*
 871          * the thunder_stream boards all have a serial flash part that has a
 872          * different base address on the AHB bus.
 873          */
 874         if ((a->pcid->subsystem_vendor == ATTO_VENDOR_ID)
 875             && (a->pcid->subsystem_device & ATTO_SSDID_TBT))
 876                 a->flags2 |= AF2_THUNDERBOLT;
 877
 878         if (test_bit(AF2_THUNDERBOLT, &a->flags2))
 879                 a->flags2 |= AF2_SERIAL_FLASH;
 880
 881         if (a->pcid->subsystem_device == ATTO_TLSH_1068)
 882                 a->flags2 |= AF2_THUNDERLINK;
 883
 884         /* Uncached Area */
 885         high = (u8 *)*uncached_area;
 886
 887         /* initialize the scatter/gather table pages */
 888
 889         for (i = 0, sgl = a->sg_list_mds; i < num_sg_lists; i++, sgl++) {
 890                 sgl->size = sgl_page_size;
 891
 892                 list_add_tail(&sgl->next_desc, &a->free_sg_list_head);
 893
 894                 if (!esas2r_initmem_alloc(a, sgl, ESAS2R_SGL_ALIGN)) {
 895                         /* Allow the driver to load if the minimum count met. */
 896                         if (i < NUM_SGL_MIN)
 897                                 return false;
 898                         break;
 899                 }
 900         }
 901
 902         /* compute the size of the lists */
 903         a->list_size = num_requests + ESAS2R_LIST_EXTRA;
 904
 905         /* allocate the inbound list */
 906         a->inbound_list_md.size = a->list_size *
 907                                   sizeof(struct
 908                                          esas2r_inbound_list_source_entry);
 909
 910         if (!esas2r_initmem_alloc(a, &a->inbound_list_md, ESAS2R_LIST_ALIGN)) {
 911                 esas2r_hdebug("failed to allocate IB list");
 912                 return false;
 913         }
 914
 915         /* allocate the outbound list */
 916         a->outbound_list_md.size = a->list_size *
 917                                    sizeof(struct atto_vda_ob_rsp);
 918
 919         if (!esas2r_initmem_alloc(a, &a->outbound_list_md,
 920                                   ESAS2R_LIST_ALIGN)) {
 921                 esas2r_hdebug("failed to allocate IB list");
 922                 return false;
 923         }
 924
 925         /* allocate the NVRAM structure */
 926         a->nvram = (struct esas2r_sas_nvram *)high;
 927         high += sizeof(struct esas2r_sas_nvram);
 928
 929         /* allocate the discovery buffer */
 930         a->disc_buffer = high;
 931         high += ESAS2R_DISC_BUF_LEN;
 932         high = PTR_ALIGN(high, 8);
 933
 934         /* allocate the outbound list copy pointer */
 935         a->outbound_copy = (u32 volatile *)high;
 936         high += sizeof(u32);
 937
 938         if (!test_bit(AF_NVR_VALID, &a->flags))
 939                 esas2r_nvram_set_defaults(a);
 940
 941         /* update the caller's uncached memory area pointer */
 942         *uncached_area = (void *)high;
 943
 944         /* initialize the allocated memory */
 945         if (test_bit(AF_FIRST_INIT, &a->flags)) {
 946                 esas2r_targ_db_initialize(a);
 947
 948                 /* prime parts of the inbound list */
 949                 element =
 950                         (struct esas2r_inbound_list_source_entry *)a->
 951                         inbound_list_md.
 952                         virt_addr;
 953
 954                 for (i = 0; i < a->list_size; i++) {
 955                         element->address = 0;
 956                         element->reserved = 0;
 957                         element->length = cpu_to_le32(HWILSE_INTERFACE_F0
 958                                                       | (sizeof(union
 959                                                                 atto_vda_req)
 960                                                          /
 961                                                          sizeof(u32)));
 962                         element++;
 963                 }
 964
 965                 /* init the AE requests */
 966                 for (rq = a->first_ae_req, i = 0; i < num_ae_requests; rq++,
 967                      i++) {
 968                         INIT_LIST_HEAD(&rq->req_list);
 969                         if (!alloc_vda_req(a, rq)) {
 970                                 esas2r_hdebug(
 971                                         "failed to allocate a VDA request!");
 972                                 return false;
 973                         }
 974
 975                         esas2r_rq_init_request(rq, a);
 976
 977                         /* override the completion function */
 978                         rq->comp_cb = esas2r_ae_complete;
 979                 }
 980         }
 981
 982         return true;
 983 }
 984
 985 /* This code will verify that the chip is operational. */
 986 bool esas2r_check_adapter(struct esas2r_adapter *a)
 987 {
 988         u32 starttime;
 989         u32 doorbell;
 990         u64 ppaddr;
 991         u32 dw;
 992
 993         /*
 994          * if the chip reset detected flag is set, we can bypass a bunch of
 995          * stuff.
 996          */
 997         if (test_bit(AF_CHPRST_DETECTED, &a->flags))
 998                 goto skip_chip_reset;
 999
1000         /*
1001          * BEFORE WE DO ANYTHING, disable the chip interrupts!  the boot driver
1002          * may have left them enabled or we may be recovering from a fault.
1003          */
1004         esas2r_write_register_dword(a, MU_INT_MASK_OUT, ESAS2R_INT_DIS_MASK);
1005         esas2r_flush_register_dword(a, MU_INT_MASK_OUT);
1006
1007         /*
1008          * wait for the firmware to become ready by forcing an interrupt and
1009          * waiting for a response.
1010          */
1011         starttime = jiffies_to_msecs(jiffies);
1012
1013         while (true) {
1014                 esas2r_force_interrupt(a);
1015                 doorbell = esas2r_read_register_dword(a, MU_DOORBELL_OUT);
1016                 if (doorbell == 0xFFFFFFFF) {
1017                         /*
1018                          * Give the firmware up to two seconds to enable
1019                          * register access after a reset.
1020                          */
1021                         if ((jiffies_to_msecs(jiffies) - starttime) > 2000)
1022                                 return esas2r_set_degraded_mode(a,
1023                                                                 "unable to access registers");
1024                 } else if (doorbell & DRBL_FORCE_INT) {
1025                         u32 ver = (doorbell & DRBL_FW_VER_MSK);
1026
1027                         /*
1028                          * This driver supports version 0 and version 1 of
1029                          * the API
1030                          */
1031                         esas2r_write_register_dword(a, MU_DOORBELL_OUT,
1032                                                     doorbell);
1033
1034                         if (ver == DRBL_FW_VER_0) {
1035                                 set_bit(AF_LEGACY_SGE_MODE, &a->flags);
1036
1037                                 a->max_vdareq_size = 128;
1038                                 a->build_sgl = esas2r_build_sg_list_sge;
1039                         } else if (ver == DRBL_FW_VER_1) {
1040                                 clear_bit(AF_LEGACY_SGE_MODE, &a->flags);
1041
1042                                 a->max_vdareq_size = 1024;
1043                                 a->build_sgl = esas2r_build_sg_list_prd;
1044                         } else {
1045                                 return esas2r_set_degraded_mode(a,
1046                                                                 "unknown firmware version");
1047                         }
1048                         break;
1049                 }
1050
1051                 schedule_timeout_interruptible(msecs_to_jiffies(100));
1052
1053                 if ((jiffies_to_msecs(jiffies) - starttime) > 180000) {
1054                         esas2r_hdebug("FW ready TMO");
1055                         esas2r_bugon();
1056
1057                         return esas2r_set_degraded_mode(a,
1058                                                         "firmware start has timed out");
1059                 }
1060         }
1061
1062         /* purge any asynchronous events since we will repost them later */
1063         esas2r_write_register_dword(a, MU_DOORBELL_IN, DRBL_MSG_IFC_DOWN);
1064         starttime = jiffies_to_msecs(jiffies);
1065
1066         while (true) {
1067                 doorbell = esas2r_read_register_dword(a, MU_DOORBELL_OUT);
1068                 if (doorbell & DRBL_MSG_IFC_DOWN) {
1069                         esas2r_write_register_dword(a, MU_DOORBELL_OUT,
1070                                                     doorbell);
1071                         break;
1072                 }
1073
1074                 schedule_timeout_interruptible(msecs_to_jiffies(50));
1075
1076                 if ((jiffies_to_msecs(jiffies) - starttime) > 3000) {
1077                         esas2r_hdebug("timeout waiting for interface down");
1078                         break;
1079                 }
1080         }
1081 skip_chip_reset:
1082         /*
1083          * first things first, before we go changing any of these registers
1084          * disable the communication lists.
1085          */
1086         dw = esas2r_read_register_dword(a, MU_IN_LIST_CONFIG);
1087         dw &= ~MU_ILC_ENABLE;
1088         esas2r_write_register_dword(a, MU_IN_LIST_CONFIG, dw);
1089         dw = esas2r_read_register_dword(a, MU_OUT_LIST_CONFIG);
1090         dw &= ~MU_OLC_ENABLE;
1091         esas2r_write_register_dword(a, MU_OUT_LIST_CONFIG, dw);
1092
1093         /* configure the communication list addresses */
1094         ppaddr = a->inbound_list_md.phys_addr;
1095         esas2r_write_register_dword(a, MU_IN_LIST_ADDR_LO,
1096                                     lower_32_bits(ppaddr));
1097         esas2r_write_register_dword(a, MU_IN_LIST_ADDR_HI,
1098                                     upper_32_bits(ppaddr));
1099         ppaddr = a->outbound_list_md.phys_addr;
1100         esas2r_write_register_dword(a, MU_OUT_LIST_ADDR_LO,
1101                                     lower_32_bits(ppaddr));
1102         esas2r_write_register_dword(a, MU_OUT_LIST_ADDR_HI,
1103                                     upper_32_bits(ppaddr));
1104         ppaddr = a->uncached_phys +
1105                  ((u8 *)a->outbound_copy - a->uncached);
1106         esas2r_write_register_dword(a, MU_OUT_LIST_COPY_PTR_LO,
1107                                     lower_32_bits(ppaddr));
1108         esas2r_write_register_dword(a, MU_OUT_LIST_COPY_PTR_HI,
1109                                     upper_32_bits(ppaddr));
1110
1111         /* reset the read and write pointers */
1112         *a->outbound_copy =
1113                 a->last_write =
1114                         a->last_read = a->list_size - 1;
1115         set_bit(AF_COMM_LIST_TOGGLE, &a->flags);
1116         esas2r_write_register_dword(a, MU_IN_LIST_WRITE, MU_ILW_TOGGLE |
1117                                     a->last_write);
1118         esas2r_write_register_dword(a, MU_OUT_LIST_COPY, MU_OLC_TOGGLE |
1119                                     a->last_write);
1120         esas2r_write_register_dword(a, MU_IN_LIST_READ, MU_ILR_TOGGLE |
1121                                     a->last_write);
1122         esas2r_write_register_dword(a, MU_OUT_LIST_WRITE,
1123                                     MU_OLW_TOGGLE | a->last_write);
1124
1125         /* configure the interface select fields */
1126         dw = esas2r_read_register_dword(a, MU_IN_LIST_IFC_CONFIG);
1127         dw &= ~(MU_ILIC_LIST | MU_ILIC_DEST);
1128         esas2r_write_register_dword(a, MU_IN_LIST_IFC_CONFIG,
1129                                     (dw | MU_ILIC_LIST_F0 | MU_ILIC_DEST_DDR));
1130         dw = esas2r_read_register_dword(a, MU_OUT_LIST_IFC_CONFIG);
1131         dw &= ~(MU_OLIC_LIST | MU_OLIC_SOURCE);
1132         esas2r_write_register_dword(a, MU_OUT_LIST_IFC_CONFIG,
1133                                     (dw | MU_OLIC_LIST_F0 |
1134                                      MU_OLIC_SOURCE_DDR));
1135
1136         /* finish configuring the communication lists */
1137         dw = esas2r_read_register_dword(a, MU_IN_LIST_CONFIG);
1138         dw &= ~(MU_ILC_ENTRY_MASK | MU_ILC_NUMBER_MASK);
1139         dw |= MU_ILC_ENTRY_4_DW | MU_ILC_DYNAMIC_SRC
1140               | (a->list_size << MU_ILC_NUMBER_SHIFT);
1141         esas2r_write_register_dword(a, MU_IN_LIST_CONFIG, dw);
1142         dw = esas2r_read_register_dword(a, MU_OUT_LIST_CONFIG);
1143         dw &= ~(MU_OLC_ENTRY_MASK | MU_OLC_NUMBER_MASK);
1144         dw |= MU_OLC_ENTRY_4_DW | (a->list_size << MU_OLC_NUMBER_SHIFT);
1145         esas2r_write_register_dword(a, MU_OUT_LIST_CONFIG, dw);
1146
1147         /*
1148          * notify the firmware that we're done setting up the communication
1149          * list registers.  wait here until the firmware is done configuring
1150          * its lists.  it will signal that it is done by enabling the lists.
1151          */
1152         esas2r_write_register_dword(a, MU_DOORBELL_IN, DRBL_MSG_IFC_INIT);
1153         starttime = jiffies_to_msecs(jiffies);
1154
1155         while (true) {
1156                 doorbell = esas2r_read_register_dword(a, MU_DOORBELL_OUT);
1157                 if (doorbell & DRBL_MSG_IFC_INIT) {
1158                         esas2r_write_register_dword(a, MU_DOORBELL_OUT,
1159                                                     doorbell);
1160                         break;
1161                 }
1162
1163                 schedule_timeout_interruptible(msecs_to_jiffies(100));
1164
1165                 if ((jiffies_to_msecs(jiffies) - starttime) > 3000) {
1166                         esas2r_hdebug(
1167                                 "timeout waiting for communication list init");
1168                         esas2r_bugon();
1169                         return esas2r_set_degraded_mode(a,
1170                                                         "timeout waiting for communication list init");
1171                 }
1172         }
1173
1174         /*
1175          * flag whether the firmware supports the power down doorbell.  we
1176          * determine this by reading the inbound doorbell enable mask.
1177          */
1178         doorbell = esas2r_read_register_dword(a, MU_DOORBELL_IN_ENB);
1179         if (doorbell & DRBL_POWER_DOWN)
1180                 set_bit(AF2_VDA_POWER_DOWN, &a->flags2);
1181         else
1182                 clear_bit(AF2_VDA_POWER_DOWN, &a->flags2);
1183
1184         /*
1185          * enable assertion of outbound queue and doorbell interrupts in the
1186          * main interrupt cause register.
1187          */
1188         esas2r_write_register_dword(a, MU_OUT_LIST_INT_MASK, MU_OLIS_MASK);
1189         esas2r_write_register_dword(a, MU_DOORBELL_OUT_ENB, DRBL_ENB_MASK);
1190         return true;
1191 }
1192
1193 /* Process the initialization message just completed and format the next one. */
1194 static bool esas2r_format_init_msg(struct esas2r_adapter *a,
1195                                    struct esas2r_request *rq)
1196 {
1197         u32 msg = a->init_msg;
1198         struct atto_vda_cfg_init *ci;
1199
1200         a->init_msg = 0;
1201
1202         switch (msg) {
1203         case ESAS2R_INIT_MSG_START:
1204         case ESAS2R_INIT_MSG_REINIT:
1205         {
1206                 esas2r_hdebug("CFG init");
1207                 esas2r_build_cfg_req(a,
1208                                      rq,
1209                                      VDA_CFG_INIT,
1210                                      0,
1211                                      NULL);
1212                 ci = (struct atto_vda_cfg_init *)&rq->vrq->cfg.data.init;
1213                 ci->sgl_page_size = cpu_to_le32(sgl_page_size);
1214                 /* firmware interface overflows in y2106 */
1215                 ci->epoch_time = cpu_to_le32(ktime_get_real_seconds());
1216                 rq->flags |= RF_FAILURE_OK;
1217                 a->init_msg = ESAS2R_INIT_MSG_INIT;
1218                 break;
1219         }
1220
1221         case ESAS2R_INIT_MSG_INIT:
1222                 if (rq->req_stat == RS_SUCCESS) {
1223                         u32 major;
1224                         u32 minor;
1225                         u16 fw_release;
1226
1227                         a->fw_version = le16_to_cpu(
1228                                 rq->func_rsp.cfg_rsp.vda_version);
1229                         a->fw_build = rq->func_rsp.cfg_rsp.fw_build;
1230                         fw_release = le16_to_cpu(
1231                                 rq->func_rsp.cfg_rsp.fw_release);
1232                         major = LOBYTE(fw_release);
1233                         minor = HIBYTE(fw_release);
1234                         a->fw_version += (major << 16) + (minor << 24);
1235                 } else {
1236                         esas2r_hdebug("FAILED");
1237                 }
1238
1239                 /*
1240                  * the 2.71 and earlier releases of R6xx firmware did not error
1241                  * unsupported config requests correctly.
1242                  */
1243
1244                 if ((test_bit(AF2_THUNDERBOLT, &a->flags2))
1245                     || (be32_to_cpu(a->fw_version) > 0x00524702)) {
1246                         esas2r_hdebug("CFG get init");
1247                         esas2r_build_cfg_req(a,
1248                                              rq,
1249                                              VDA_CFG_GET_INIT2,
1250                                              sizeof(struct atto_vda_cfg_init),
1251                                              NULL);
1252
1253                         rq->vrq->cfg.sg_list_offset = offsetof(
1254                                 struct atto_vda_cfg_req,
1255                                 data.sge);
1256                         rq->vrq->cfg.data.prde.ctl_len =
1257                                 cpu_to_le32(sizeof(struct atto_vda_cfg_init));
1258                         rq->vrq->cfg.data.prde.address = cpu_to_le64(
1259                                 rq->vrq_md->phys_addr +
1260                                 sizeof(union atto_vda_req));
1261                         rq->flags |= RF_FAILURE_OK;
1262                         a->init_msg = ESAS2R_INIT_MSG_GET_INIT;
1263                         break;
1264                 }
1265
1266         case ESAS2R_INIT_MSG_GET_INIT:
1267                 if (msg == ESAS2R_INIT_MSG_GET_INIT) {
1268                         ci = (struct atto_vda_cfg_init *)rq->data_buf;
1269                         if (rq->req_stat == RS_SUCCESS) {
1270                                 a->num_targets_backend =
1271                                         le32_to_cpu(ci->num_targets_backend);
1272                                 a->ioctl_tunnel =
1273                                         le32_to_cpu(ci->ioctl_tunnel);
1274                         } else {
1275                                 esas2r_hdebug("FAILED");
1276                         }
1277                 }
1278         /* fall through */
1279
1280         default:
1281                 rq->req_stat = RS_SUCCESS;
1282                 return false;
1283         }
1284         return true;
1285 }
1286
1287 /*
1288  * Perform initialization messages via the request queue.  Messages are
1289  * performed with interrupts disabled.
1290  */
1291 bool esas2r_init_msgs(struct esas2r_adapter *a)
1292 {
1293         bool success = true;
1294         struct esas2r_request *rq = &a->general_req;
1295
1296         esas2r_rq_init_request(rq, a);
1297         rq->comp_cb = esas2r_dummy_complete;
1298
1299         if (a->init_msg == 0)
1300                 a->init_msg = ESAS2R_INIT_MSG_REINIT;
1301
1302         while (a->init_msg) {
1303                 if (esas2r_format_init_msg(a, rq)) {
1304                         unsigned long flags;
1305                         while (true) {
1306                                 spin_lock_irqsave(&a->queue_lock, flags);
1307                                 esas2r_start_vda_request(a, rq);
1308                                 spin_unlock_irqrestore(&a->queue_lock, flags);
1309                                 esas2r_wait_request(a, rq);
1310                                 if (rq->req_stat != RS_PENDING)
1311                                         break;
1312                         }
1313                 }
1314
1315                 if (rq->req_stat == RS_SUCCESS
1316                     || ((rq->flags & RF_FAILURE_OK)
1317                         && rq->req_stat != RS_TIMEOUT))
1318                         continue;
1319
1320                 esas2r_log(ESAS2R_LOG_CRIT, "init message %x failed (%x, %x)",
1321                            a->init_msg, rq->req_stat, rq->flags);
1322                 a->init_msg = ESAS2R_INIT_MSG_START;
1323                 success = false;
1324                 break;
1325         }
1326
1327         esas2r_rq_destroy_request(rq, a);
1328         return success;
1329 }
1330
1331 /* Initialize the adapter chip */
1332 bool esas2r_init_adapter_hw(struct esas2r_adapter *a, bool init_poll)
1333 {
1334         bool rslt = false;
1335         struct esas2r_request *rq;
1336         u32 i;
1337
1338         if (test_bit(AF_DEGRADED_MODE, &a->flags))
1339                 goto exit;
1340
1341         if (!test_bit(AF_NVR_VALID, &a->flags)) {
1342                 if (!esas2r_nvram_read_direct(a))
1343                         esas2r_log(ESAS2R_LOG_WARN,
1344                                    "invalid/missing NVRAM parameters");
1345         }
1346
1347         if (!esas2r_init_msgs(a)) {
1348                 esas2r_set_degraded_mode(a, "init messages failed");
1349                 goto exit;
1350         }
1351
1352         /* The firmware is ready. */
1353         clear_bit(AF_DEGRADED_MODE, &a->flags);
1354         clear_bit(AF_CHPRST_PENDING, &a->flags);
1355
1356         /* Post all the async event requests */
1357         for (i = 0, rq = a->first_ae_req; i < num_ae_requests; i++, rq++)
1358                 esas2r_start_ae_request(a, rq);
1359
1360         if (!a->flash_rev[0])
1361                 esas2r_read_flash_rev(a);
1362
1363         if (!a->image_type[0])
1364                 esas2r_read_image_type(a);
1365
1366         if (a->fw_version == 0)
1367                 a->fw_rev[0] = 0;
1368         else
1369                 sprintf(a->fw_rev, "%1d.%02d",
1370                         (int)LOBYTE(HIWORD(a->fw_version)),
1371                         (int)HIBYTE(HIWORD(a->fw_version)));
1372
1373         esas2r_hdebug("firmware revision: %s", a->fw_rev);
1374
1375         if (test_bit(AF_CHPRST_DETECTED, &a->flags)
1376             && (test_bit(AF_FIRST_INIT, &a->flags))) {
1377                 esas2r_enable_chip_interrupts(a);
1378                 return true;
1379         }
1380
1381         /* initialize discovery */
1382         esas2r_disc_initialize(a);
1383
1384         /*
1385          * wait for the device wait time to expire here if requested.  this is
1386          * usually requested during initial driver load and possibly when
1387          * resuming from a low power state.  deferred device waiting will use
1388          * interrupts.  chip reset recovery always defers device waiting to
1389          * avoid being in a TASKLET too long.
1390          */
1391         if (init_poll) {
1392                 u32 currtime = a->disc_start_time;
1393                 u32 nexttick = 100;
1394                 u32 deltatime;
1395
1396                 /*
1397                  * Block Tasklets from getting scheduled and indicate this is
1398                  * polled discovery.
1399                  */
1400                 set_bit(AF_TASKLET_SCHEDULED, &a->flags);
1401                 set_bit(AF_DISC_POLLED, &a->flags);
1402
1403                 /*
1404                  * Temporarily bring the disable count to zero to enable
1405                  * deferred processing.  Note that the count is already zero
1406                  * after the first initialization.
1407                  */
1408                 if (test_bit(AF_FIRST_INIT, &a->flags))
1409                         atomic_dec(&a->disable_cnt);
1410
1411                 while (test_bit(AF_DISC_PENDING, &a->flags)) {
1412                         schedule_timeout_interruptible(msecs_to_jiffies(100));
1413
1414                         /*
1415                          * Determine the need for a timer tick based on the
1416                          * delta time between this and the last iteration of
1417                          * this loop.  We don't use the absolute time because
1418                          * then we would have to worry about when nexttick
1419                          * wraps and currtime hasn't yet.
1420                          */
1421                         deltatime = jiffies_to_msecs(jiffies) - currtime;
1422                         currtime += deltatime;
1423
1424                         /*
1425                          * Process any waiting discovery as long as the chip is
1426                          * up.  If a chip reset happens during initial polling,
1427                          * we have to make sure the timer tick processes the
1428                          * doorbell indicating the firmware is ready.
1429                          */
1430                         if (!test_bit(AF_CHPRST_PENDING, &a->flags))
1431                                 esas2r_disc_check_for_work(a);
1432
1433                         /* Simulate a timer tick. */
1434                         if (nexttick <= deltatime) {
1435
1436                                 /* Time for a timer tick */
1437                                 nexttick += 100;
1438                                 esas2r_timer_tick(a);
1439                         }
1440
1441                         if (nexttick > deltatime)
1442                                 nexttick -= deltatime;
1443
1444                         /* Do any deferred processing */
1445                         if (esas2r_is_tasklet_pending(a))
1446                                 esas2r_do_tasklet_tasks(a);
1447
1448                 }
1449
1450                 if (test_bit(AF_FIRST_INIT, &a->flags))
1451                         atomic_inc(&a->disable_cnt);
1452
1453                 clear_bit(AF_DISC_POLLED, &a->flags);
1454                 clear_bit(AF_TASKLET_SCHEDULED, &a->flags);
1455         }
1456
1457
1458         esas2r_targ_db_report_changes(a);
1459
1460         /*
1461          * For cases where (a) the initialization messages processing may
1462          * handle an interrupt for a port event and a discovery is waiting, but
1463          * we are not waiting for devices, or (b) the device wait time has been
1464          * exhausted but there is still discovery pending, start any leftover
1465          * discovery in interrupt driven mode.
1466          */
1467         esas2r_disc_start_waiting(a);
1468
1469         /* Enable chip interrupts */
1470         a->int_mask = ESAS2R_INT_STS_MASK;
1471         esas2r_enable_chip_interrupts(a);
1472         esas2r_enable_heartbeat(a);
1473         rslt = true;
1474
1475 exit:
1476         /*
1477          * Regardless of whether initialization was successful, certain things
1478          * need to get done before we exit.
1479          */
1480
1481         if (test_bit(AF_CHPRST_DETECTED, &a->flags) &&
1482             test_bit(AF_FIRST_INIT, &a->flags)) {
1483                 /*
1484                  * Reinitialization was performed during the first
1485                  * initialization.  Only clear the chip reset flag so the
1486                  * original device polling is not cancelled.
1487                  */
1488                 if (!rslt)
1489                         clear_bit(AF_CHPRST_PENDING, &a->flags);
1490         } else {
1491                 /* First initialization or a subsequent re-init is complete. */
1492                 if (!rslt) {
1493                         clear_bit(AF_CHPRST_PENDING, &a->flags);
1494                         clear_bit(AF_DISC_PENDING, &a->flags);
1495                 }
1496
1497
1498                 /* Enable deferred processing after the first initialization. */
1499                 if (test_bit(AF_FIRST_INIT, &a->flags)) {
1500                         clear_bit(AF_FIRST_INIT, &a->flags);
1501
1502                         if (atomic_dec_return(&a->disable_cnt) == 0)
1503                                 esas2r_do_deferred_processes(a);
1504                 }
1505         }
1506
1507         return rslt;
1508 }
1509
1510 void esas2r_reset_adapter(struct esas2r_adapter *a)
1511 {
1512         set_bit(AF_OS_RESET, &a->flags);
1513         esas2r_local_reset_adapter(a);
1514         esas2r_schedule_tasklet(a);
1515 }
1516
1517 void esas2r_reset_chip(struct esas2r_adapter *a)
1518 {
1519         if (!esas2r_is_adapter_present(a))
1520                 return;
1521
1522         /*
1523          * Before we reset the chip, save off the VDA core dump.  The VDA core
1524          * dump is located in the upper 512KB of the onchip SRAM.  Make sure
1525          * to not overwrite a previous crash that was saved.
1526          */
1527         if (test_bit(AF2_COREDUMP_AVAIL, &a->flags2) &&
1528             !test_bit(AF2_COREDUMP_SAVED, &a->flags2)) {
1529                 esas2r_read_mem_block(a,
1530                                       a->fw_coredump_buff,
1531                                       MW_DATA_ADDR_SRAM + 0x80000,
1532                                       ESAS2R_FWCOREDUMP_SZ);
1533
1534                 set_bit(AF2_COREDUMP_SAVED, &a->flags2);
1535         }
1536
1537         clear_bit(AF2_COREDUMP_AVAIL, &a->flags2);
1538
1539         /* Reset the chip */
1540         if (a->pcid->revision == MVR_FREY_B2)
1541                 esas2r_write_register_dword(a, MU_CTL_STATUS_IN_B2,
1542                                             MU_CTL_IN_FULL_RST2);
1543         else
1544                 esas2r_write_register_dword(a, MU_CTL_STATUS_IN,
1545                                             MU_CTL_IN_FULL_RST);
1546
1547
1548         /* Stall a little while to let the reset condition clear */
1549         mdelay(10);
1550 }
1551
1552 static void esas2r_power_down_notify_firmware(struct esas2r_adapter *a)
1553 {
1554         u32 starttime;
1555         u32 doorbell;
1556
1557         esas2r_write_register_dword(a, MU_DOORBELL_IN, DRBL_POWER_DOWN);
1558         starttime = jiffies_to_msecs(jiffies);
1559
1560         while (true) {
1561                 doorbell = esas2r_read_register_dword(a, MU_DOORBELL_OUT);
1562                 if (doorbell & DRBL_POWER_DOWN) {
1563                         esas2r_write_register_dword(a, MU_DOORBELL_OUT,
1564                                                     doorbell);
1565                         break;
1566                 }
1567
1568                 schedule_timeout_interruptible(msecs_to_jiffies(100));
1569
1570                 if ((jiffies_to_msecs(jiffies) - starttime) > 30000) {
1571                         esas2r_hdebug("Timeout waiting for power down");
1572                         break;
1573                 }
1574         }
1575 }
1576
1577 /*
1578  * Perform power management processing including managing device states, adapter
1579  * states, interrupts, and I/O.
1580  */
1581 void esas2r_power_down(struct esas2r_adapter *a)
1582 {
1583         set_bit(AF_POWER_MGT, &a->flags);
1584         set_bit(AF_POWER_DOWN, &a->flags);
1585
1586         if (!test_bit(AF_DEGRADED_MODE, &a->flags)) {
1587                 u32 starttime;
1588                 u32 doorbell;
1589
1590                 /*
1591                  * We are currently running OK and will be reinitializing later.
1592                  * increment the disable count to coordinate with
1593                  * esas2r_init_adapter.  We don't have to do this in degraded
1594                  * mode since we never enabled interrupts in the first place.
1595                  */
1596                 esas2r_disable_chip_interrupts(a);
1597                 esas2r_disable_heartbeat(a);
1598
1599                 /* wait for any VDA activity to clear before continuing */
1600                 esas2r_write_register_dword(a, MU_DOORBELL_IN,
1601                                             DRBL_MSG_IFC_DOWN);
1602                 starttime = jiffies_to_msecs(jiffies);
1603
1604                 while (true) {
1605                         doorbell =
1606                                 esas2r_read_register_dword(a, MU_DOORBELL_OUT);
1607                         if (doorbell & DRBL_MSG_IFC_DOWN) {
1608                                 esas2r_write_register_dword(a, MU_DOORBELL_OUT,
1609                                                             doorbell);
1610                                 break;
1611                         }
1612
1613                         schedule_timeout_interruptible(msecs_to_jiffies(100));
1614
1615                         if ((jiffies_to_msecs(jiffies) - starttime) > 3000) {
1616                                 esas2r_hdebug(
1617                                         "timeout waiting for interface down");
1618                                 break;
1619                         }
1620                 }
1621
1622                 /*
1623                  * For versions of firmware that support it tell them the driver
1624                  * is powering down.
1625                  */
1626                 if (test_bit(AF2_VDA_POWER_DOWN, &a->flags2))
1627                         esas2r_power_down_notify_firmware(a);
1628         }
1629
1630         /* Suspend I/O processing. */
1631         set_bit(AF_OS_RESET, &a->flags);
1632         set_bit(AF_DISC_PENDING, &a->flags);
1633         set_bit(AF_CHPRST_PENDING, &a->flags);
1634
1635         esas2r_process_adapter_reset(a);
1636
1637         /* Remove devices now that I/O is cleaned up. */
1638         a->prev_dev_cnt = esas2r_targ_db_get_tgt_cnt(a);
1639         esas2r_targ_db_remove_all(a, false);
1640 }
1641
1642 /*
1643  * Perform power management processing including managing device states, adapter
1644  * states, interrupts, and I/O.
1645  */
1646 bool esas2r_power_up(struct esas2r_adapter *a, bool init_poll)
1647 {
1648         bool ret;
1649
1650         clear_bit(AF_POWER_DOWN, &a->flags);
1651         esas2r_init_pci_cfg_space(a);
1652         set_bit(AF_FIRST_INIT, &a->flags);
1653         atomic_inc(&a->disable_cnt);
1654
1655         /* reinitialize the adapter */
1656         ret = esas2r_check_adapter(a);
1657         if (!esas2r_init_adapter_hw(a, init_poll))
1658                 ret = false;
1659
1660         /* send the reset asynchronous event */
1661         esas2r_send_reset_ae(a, true);
1662
1663         /* clear this flag after initialization. */
1664         clear_bit(AF_POWER_MGT, &a->flags);
1665         return ret;
1666 }
1667
1668 bool esas2r_is_adapter_present(struct esas2r_adapter *a)
1669 {
1670         if (test_bit(AF_NOT_PRESENT, &a->flags))
1671                 return false;
1672
1673         if (esas2r_read_register_dword(a, MU_DOORBELL_OUT) == 0xFFFFFFFF) {
1674                 set_bit(AF_NOT_PRESENT, &a->flags);
1675
1676                 return false;
1677         }
1678         return true;
1679 }
1680
1681 const char *esas2r_get_model_name(struct esas2r_adapter *a)
1682 {
1683         switch (a->pcid->subsystem_device) {
1684         case ATTO_ESAS_R680:
1685                 return "ATTO ExpressSAS R680";
1686
1687         case ATTO_ESAS_R608:
1688                 return "ATTO ExpressSAS R608";
1689
1690         case ATTO_ESAS_R60F:
1691                 return "ATTO ExpressSAS R60F";
1692
1693         case ATTO_ESAS_R6F0:
1694                 return "ATTO ExpressSAS R6F0";
1695
1696         case ATTO_ESAS_R644:
1697                 return "ATTO ExpressSAS R644";
1698
1699         case ATTO_ESAS_R648:
1700                 return "ATTO ExpressSAS R648";
1701
1702         case ATTO_TSSC_3808:
1703                 return "ATTO ThunderStream SC 3808D";
1704
1705         case ATTO_TSSC_3808E:
1706                 return "ATTO ThunderStream SC 3808E";
1707
1708         case ATTO_TLSH_1068:
1709                 return "ATTO ThunderLink SH 1068";
1710         }
1711
1712         return "ATTO SAS Controller";
1713 }
1714
1715 const char *esas2r_get_model_name_short(struct esas2r_adapter *a)
1716 {
1717         switch (a->pcid->subsystem_device) {
1718         case ATTO_ESAS_R680:
1719                 return "R680";
1720
1721         case ATTO_ESAS_R608:
1722                 return "R608";
1723
1724         case ATTO_ESAS_R60F:
1725                 return "R60F";
1726
1727         case ATTO_ESAS_R6F0:
1728                 return "R6F0";
1729
1730         case ATTO_ESAS_R644:
1731                 return "R644";
1732
1733         case ATTO_ESAS_R648:
1734                 return "R648";
1735
1736         case ATTO_TSSC_3808:
1737                 return "SC 3808D";
1738
1739         case ATTO_TSSC_3808E:
1740                 return "SC 3808E";
1741
1742         case ATTO_TLSH_1068:
1743                 return "SH 1068";
1744         }
1745
1746         return "unknown";
1747 }