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, %x)",
 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         sema_init(&a->fm_api_semaphore, 1);
 331         sema_init(&a->fs_api_semaphore, 1);
 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_cleanup(struct Scsi_Host *host)
 665 {
 666         struct esas2r_adapter *a;
 667         int index;
 668
 669         if (host == NULL) {
 670                 int i;
 671
 672                 esas2r_debug("esas2r_cleanup everything");
 673                 for (i = 0; i < MAX_ADAPTERS; i++)
 674                         esas2r_kill_adapter(i);
 675                 return -1;
 676         }
 677
 678         esas2r_debug("esas2r_cleanup called for host %p", host);
 679         a = (struct esas2r_adapter *)host->hostdata;
 680         index = a->index;
 681         esas2r_kill_adapter(index);
 682         return index;
 683 }
 684
 685 int esas2r_suspend(struct pci_dev *pdev, pm_message_t state)
 686 {
 687         struct Scsi_Host *host = pci_get_drvdata(pdev);
 688         u32 device_state;
 689         struct esas2r_adapter *a = (struct esas2r_adapter *)host->hostdata;
 690
 691         esas2r_log_dev(ESAS2R_LOG_INFO, &(pdev->dev), "suspending adapter()");
 692         if (!a)
 693                 return -ENODEV;
 694
 695         esas2r_adapter_power_down(a, 1);
 696         device_state = pci_choose_state(pdev, state);
 697         esas2r_log_dev(ESAS2R_LOG_INFO, &(pdev->dev),
 698                        "pci_save_state() called");
 699         pci_save_state(pdev);
 700         esas2r_log_dev(ESAS2R_LOG_INFO, &(pdev->dev),
 701                        "pci_disable_device() called");
 702         pci_disable_device(pdev);
 703         esas2r_log_dev(ESAS2R_LOG_INFO, &(pdev->dev),
 704                        "pci_set_power_state() called");
 705         pci_set_power_state(pdev, device_state);
 706         esas2r_log_dev(ESAS2R_LOG_INFO, &(pdev->dev), "esas2r_suspend(): 0");
 707         return 0;
 708 }
 709
 710 int esas2r_resume(struct pci_dev *pdev)
 711 {
 712         struct Scsi_Host *host = pci_get_drvdata(pdev);
 713         struct esas2r_adapter *a = (struct esas2r_adapter *)host->hostdata;
 714         int rez;
 715
 716         esas2r_log_dev(ESAS2R_LOG_INFO, &(pdev->dev), "resuming adapter()");
 717         esas2r_log_dev(ESAS2R_LOG_INFO, &(pdev->dev),
 718                        "pci_set_power_state(PCI_D0) "
 719                        "called");
 720         pci_set_power_state(pdev, PCI_D0);
 721         esas2r_log_dev(ESAS2R_LOG_INFO, &(pdev->dev),
 722                        "pci_enable_wake(PCI_D0, 0) "
 723                        "called");
 724         pci_enable_wake(pdev, PCI_D0, 0);
 725         esas2r_log_dev(ESAS2R_LOG_INFO, &(pdev->dev),
 726                        "pci_restore_state() called");
 727         pci_restore_state(pdev);
 728         esas2r_log_dev(ESAS2R_LOG_INFO, &(pdev->dev),
 729                        "pci_enable_device() called");
 730         rez = pci_enable_device(pdev);
 731         pci_set_master(pdev);
 732
 733         if (!a) {
 734                 rez = -ENODEV;
 735                 goto error_exit;
 736         }
 737
 738         if (esas2r_map_regions(a) != 0) {
 739                 esas2r_log(ESAS2R_LOG_CRIT, "could not re-map PCI regions!");
 740                 rez = -ENOMEM;
 741                 goto error_exit;
 742         }
 743
 744         /* Set up interupt mode */
 745         esas2r_setup_interrupts(a, a->intr_mode);
 746
 747         /*
 748          * Disable chip interrupts to prevent spurious interrupts until we
 749          * claim the IRQ.
 750          */
 751         esas2r_disable_chip_interrupts(a);
 752         if (!esas2r_power_up(a, true)) {
 753                 esas2r_debug("yikes, esas2r_power_up failed");
 754                 rez = -ENOMEM;
 755                 goto error_exit;
 756         }
 757
 758         esas2r_claim_interrupts(a);
 759
 760         if (test_bit(AF2_IRQ_CLAIMED, &a->flags2)) {
 761                 /*
 762                  * Now that system interrupt(s) are claimed, we can enable
 763                  * chip interrupts.
 764                  */
 765                 esas2r_enable_chip_interrupts(a);
 766                 esas2r_kickoff_timer(a);
 767         } else {
 768                 esas2r_debug("yikes, unable to claim IRQ");
 769                 esas2r_log(ESAS2R_LOG_CRIT, "could not re-claim IRQ!");
 770                 rez = -ENOMEM;
 771                 goto error_exit;
 772         }
 773
 774 error_exit:
 775         esas2r_log_dev(ESAS2R_LOG_CRIT, &(pdev->dev), "esas2r_resume(): %d",
 776                        rez);
 777         return rez;
 778 }
 779
 780 bool esas2r_set_degraded_mode(struct esas2r_adapter *a, char *error_str)
 781 {
 782         set_bit(AF_DEGRADED_MODE, &a->flags);
 783         esas2r_log(ESAS2R_LOG_CRIT,
 784                    "setting adapter to degraded mode: %s\n", error_str);
 785         return false;
 786 }
 787
 788 u32 esas2r_get_uncached_size(struct esas2r_adapter *a)
 789 {
 790         return sizeof(struct esas2r_sas_nvram)
 791                + ALIGN(ESAS2R_DISC_BUF_LEN, 8)
 792                + ALIGN(sizeof(u32), 8) /* outbound list copy pointer */
 793                + 8
 794                + (num_sg_lists * (u16)sgl_page_size)
 795                + ALIGN((num_requests + num_ae_requests + 1 +
 796                         ESAS2R_LIST_EXTRA) *
 797                        sizeof(struct esas2r_inbound_list_source_entry),
 798                        8)
 799                + ALIGN((num_requests + num_ae_requests + 1 +
 800                         ESAS2R_LIST_EXTRA) *
 801                        sizeof(struct atto_vda_ob_rsp), 8)
 802                + 256; /* VDA request and buffer align */
 803 }
 804
 805 static void esas2r_init_pci_cfg_space(struct esas2r_adapter *a)
 806 {
 807         int pcie_cap_reg;
 808
 809         pcie_cap_reg = pci_find_capability(a->pcid, PCI_CAP_ID_EXP);
 810         if (pcie_cap_reg) {
 811                 u16 devcontrol;
 812
 813                 pci_read_config_word(a->pcid, pcie_cap_reg + PCI_EXP_DEVCTL,
 814                                      &devcontrol);
 815
 816                 if ((devcontrol & PCI_EXP_DEVCTL_READRQ) > 0x2000) {
 817                         esas2r_log(ESAS2R_LOG_INFO,
 818                                    "max read request size > 512B");
 819
 820                         devcontrol &= ~PCI_EXP_DEVCTL_READRQ;
 821                         devcontrol |= 0x2000;
 822                         pci_write_config_word(a->pcid,
 823                                               pcie_cap_reg + PCI_EXP_DEVCTL,
 824                                               devcontrol);
 825                 }
 826         }
 827 }
 828
 829 /*
 830  * Determine the organization of the uncached data area and
 831  * finish initializing the adapter structure
 832  */
 833 bool esas2r_init_adapter_struct(struct esas2r_adapter *a,
 834                                 void **uncached_area)
 835 {
 836         u32 i;
 837         u8 *high;
 838         struct esas2r_inbound_list_source_entry *element;
 839         struct esas2r_request *rq;
 840         struct esas2r_mem_desc *sgl;
 841
 842         spin_lock_init(&a->sg_list_lock);
 843         spin_lock_init(&a->mem_lock);
 844         spin_lock_init(&a->queue_lock);
 845
 846         a->targetdb_end = &a->targetdb[ESAS2R_MAX_TARGETS];
 847
 848         if (!alloc_vda_req(a, &a->general_req)) {
 849                 esas2r_hdebug(
 850                         "failed to allocate a VDA request for the general req!");
 851                 return false;
 852         }
 853
 854         /* allocate requests for asynchronous events */
 855         a->first_ae_req =
 856                 kzalloc(num_ae_requests * sizeof(struct esas2r_request),
 857                         GFP_KERNEL);
 858
 859         if (a->first_ae_req == NULL) {
 860                 esas2r_log(ESAS2R_LOG_CRIT,
 861                            "failed to allocate memory for asynchronous events");
 862                 return false;
 863         }
 864
 865         /* allocate the S/G list memory descriptors */
 866         a->sg_list_mds = kzalloc(
 867                 num_sg_lists * sizeof(struct esas2r_mem_desc), GFP_KERNEL);
 868
 869         if (a->sg_list_mds == NULL) {
 870                 esas2r_log(ESAS2R_LOG_CRIT,
 871                            "failed to allocate memory for s/g list descriptors");
 872                 return false;
 873         }
 874
 875         /* allocate the request table */
 876         a->req_table =
 877                 kzalloc((num_requests + num_ae_requests +
 878                          1) * sizeof(struct esas2r_request *), GFP_KERNEL);
 879
 880         if (a->req_table == NULL) {
 881                 esas2r_log(ESAS2R_LOG_CRIT,
 882                            "failed to allocate memory for the request table");
 883                 return false;
 884         }
 885
 886         /* initialize PCI configuration space */
 887         esas2r_init_pci_cfg_space(a);
 888
 889         /*
 890          * the thunder_stream boards all have a serial flash part that has a
 891          * different base address on the AHB bus.
 892          */
 893         if ((a->pcid->subsystem_vendor == ATTO_VENDOR_ID)
 894             && (a->pcid->subsystem_device & ATTO_SSDID_TBT))
 895                 a->flags2 |= AF2_THUNDERBOLT;
 896
 897         if (test_bit(AF2_THUNDERBOLT, &a->flags2))
 898                 a->flags2 |= AF2_SERIAL_FLASH;
 899
 900         if (a->pcid->subsystem_device == ATTO_TLSH_1068)
 901                 a->flags2 |= AF2_THUNDERLINK;
 902
 903         /* Uncached Area */
 904         high = (u8 *)*uncached_area;
 905
 906         /* initialize the scatter/gather table pages */
 907
 908         for (i = 0, sgl = a->sg_list_mds; i < num_sg_lists; i++, sgl++) {
 909                 sgl->size = sgl_page_size;
 910
 911                 list_add_tail(&sgl->next_desc, &a->free_sg_list_head);
 912
 913                 if (!esas2r_initmem_alloc(a, sgl, ESAS2R_SGL_ALIGN)) {
 914                         /* Allow the driver to load if the minimum count met. */
 915                         if (i < NUM_SGL_MIN)
 916                                 return false;
 917                         break;
 918                 }
 919         }
 920
 921         /* compute the size of the lists */
 922         a->list_size = num_requests + ESAS2R_LIST_EXTRA;
 923
 924         /* allocate the inbound list */
 925         a->inbound_list_md.size = a->list_size *
 926                                   sizeof(struct
 927                                          esas2r_inbound_list_source_entry);
 928
 929         if (!esas2r_initmem_alloc(a, &a->inbound_list_md, ESAS2R_LIST_ALIGN)) {
 930                 esas2r_hdebug("failed to allocate IB list");
 931                 return false;
 932         }
 933
 934         /* allocate the outbound list */
 935         a->outbound_list_md.size = a->list_size *
 936                                    sizeof(struct atto_vda_ob_rsp);
 937
 938         if (!esas2r_initmem_alloc(a, &a->outbound_list_md,
 939                                   ESAS2R_LIST_ALIGN)) {
 940                 esas2r_hdebug("failed to allocate IB list");
 941                 return false;
 942         }
 943
 944         /* allocate the NVRAM structure */
 945         a->nvram = (struct esas2r_sas_nvram *)high;
 946         high += sizeof(struct esas2r_sas_nvram);
 947
 948         /* allocate the discovery buffer */
 949         a->disc_buffer = high;
 950         high += ESAS2R_DISC_BUF_LEN;
 951         high = PTR_ALIGN(high, 8);
 952
 953         /* allocate the outbound list copy pointer */
 954         a->outbound_copy = (u32 volatile *)high;
 955         high += sizeof(u32);
 956
 957         if (!test_bit(AF_NVR_VALID, &a->flags))
 958                 esas2r_nvram_set_defaults(a);
 959
 960         /* update the caller's uncached memory area pointer */
 961         *uncached_area = (void *)high;
 962
 963         /* initialize the allocated memory */
 964         if (test_bit(AF_FIRST_INIT, &a->flags)) {
 965                 memset(a->req_table, 0,
 966                        (num_requests + num_ae_requests +
 967                         1) * sizeof(struct esas2r_request *));
 968
 969                 esas2r_targ_db_initialize(a);
 970
 971                 /* prime parts of the inbound list */
 972                 element =
 973                         (struct esas2r_inbound_list_source_entry *)a->
 974                         inbound_list_md.
 975                         virt_addr;
 976
 977                 for (i = 0; i < a->list_size; i++) {
 978                         element->address = 0;
 979                         element->reserved = 0;
 980                         element->length = cpu_to_le32(HWILSE_INTERFACE_F0
 981                                                       | (sizeof(union
 982                                                                 atto_vda_req)
 983                                                          /
 984                                                          sizeof(u32)));
 985                         element++;
 986                 }
 987
 988                 /* init the AE requests */
 989                 for (rq = a->first_ae_req, i = 0; i < num_ae_requests; rq++,
 990                      i++) {
 991                         INIT_LIST_HEAD(&rq->req_list);
 992                         if (!alloc_vda_req(a, rq)) {
 993                                 esas2r_hdebug(
 994                                         "failed to allocate a VDA request!");
 995                                 return false;
 996                         }
 997
 998                         esas2r_rq_init_request(rq, a);
 999
1000                         /* override the completion function */
1001                         rq->comp_cb = esas2r_ae_complete;
1002                 }
1003         }
1004
1005         return true;
1006 }
1007
1008 /* This code will verify that the chip is operational. */
1009 bool esas2r_check_adapter(struct esas2r_adapter *a)
1010 {
1011         u32 starttime;
1012         u32 doorbell;
1013         u64 ppaddr;
1014         u32 dw;
1015
1016         /*
1017          * if the chip reset detected flag is set, we can bypass a bunch of
1018          * stuff.
1019          */
1020         if (test_bit(AF_CHPRST_DETECTED, &a->flags))
1021                 goto skip_chip_reset;
1022
1023         /*
1024          * BEFORE WE DO ANYTHING, disable the chip interrupts!  the boot driver
1025          * may have left them enabled or we may be recovering from a fault.
1026          */
1027         esas2r_write_register_dword(a, MU_INT_MASK_OUT, ESAS2R_INT_DIS_MASK);
1028         esas2r_flush_register_dword(a, MU_INT_MASK_OUT);
1029
1030         /*
1031          * wait for the firmware to become ready by forcing an interrupt and
1032          * waiting for a response.
1033          */
1034         starttime = jiffies_to_msecs(jiffies);
1035
1036         while (true) {
1037                 esas2r_force_interrupt(a);
1038                 doorbell = esas2r_read_register_dword(a, MU_DOORBELL_OUT);
1039                 if (doorbell == 0xFFFFFFFF) {
1040                         /*
1041                          * Give the firmware up to two seconds to enable
1042                          * register access after a reset.
1043                          */
1044                         if ((jiffies_to_msecs(jiffies) - starttime) > 2000)
1045                                 return esas2r_set_degraded_mode(a,
1046                                                                 "unable to access registers");
1047                 } else if (doorbell & DRBL_FORCE_INT) {
1048                         u32 ver = (doorbell & DRBL_FW_VER_MSK);
1049
1050                         /*
1051                          * This driver supports version 0 and version 1 of
1052                          * the API
1053                          */
1054                         esas2r_write_register_dword(a, MU_DOORBELL_OUT,
1055                                                     doorbell);
1056
1057                         if (ver == DRBL_FW_VER_0) {
1058                                 set_bit(AF_LEGACY_SGE_MODE, &a->flags);
1059
1060                                 a->max_vdareq_size = 128;
1061                                 a->build_sgl = esas2r_build_sg_list_sge;
1062                         } else if (ver == DRBL_FW_VER_1) {
1063                                 clear_bit(AF_LEGACY_SGE_MODE, &a->flags);
1064
1065                                 a->max_vdareq_size = 1024;
1066                                 a->build_sgl = esas2r_build_sg_list_prd;
1067                         } else {
1068                                 return esas2r_set_degraded_mode(a,
1069                                                                 "unknown firmware version");
1070                         }
1071                         break;
1072                 }
1073
1074                 schedule_timeout_interruptible(msecs_to_jiffies(100));
1075
1076                 if ((jiffies_to_msecs(jiffies) - starttime) > 180000) {
1077                         esas2r_hdebug("FW ready TMO");
1078                         esas2r_bugon();
1079
1080                         return esas2r_set_degraded_mode(a,
1081                                                         "firmware start has timed out");
1082                 }
1083         }
1084
1085         /* purge any asynchronous events since we will repost them later */
1086         esas2r_write_register_dword(a, MU_DOORBELL_IN, DRBL_MSG_IFC_DOWN);
1087         starttime = jiffies_to_msecs(jiffies);
1088
1089         while (true) {
1090                 doorbell = esas2r_read_register_dword(a, MU_DOORBELL_OUT);
1091                 if (doorbell & DRBL_MSG_IFC_DOWN) {
1092                         esas2r_write_register_dword(a, MU_DOORBELL_OUT,
1093                                                     doorbell);
1094                         break;
1095                 }
1096
1097                 schedule_timeout_interruptible(msecs_to_jiffies(50));
1098
1099                 if ((jiffies_to_msecs(jiffies) - starttime) > 3000) {
1100                         esas2r_hdebug("timeout waiting for interface down");
1101                         break;
1102                 }
1103         }
1104 skip_chip_reset:
1105         /*
1106          * first things first, before we go changing any of these registers
1107          * disable the communication lists.
1108          */
1109         dw = esas2r_read_register_dword(a, MU_IN_LIST_CONFIG);
1110         dw &= ~MU_ILC_ENABLE;
1111         esas2r_write_register_dword(a, MU_IN_LIST_CONFIG, dw);
1112         dw = esas2r_read_register_dword(a, MU_OUT_LIST_CONFIG);
1113         dw &= ~MU_OLC_ENABLE;
1114         esas2r_write_register_dword(a, MU_OUT_LIST_CONFIG, dw);
1115
1116         /* configure the communication list addresses */
1117         ppaddr = a->inbound_list_md.phys_addr;
1118         esas2r_write_register_dword(a, MU_IN_LIST_ADDR_LO,
1119                                     lower_32_bits(ppaddr));
1120         esas2r_write_register_dword(a, MU_IN_LIST_ADDR_HI,
1121                                     upper_32_bits(ppaddr));
1122         ppaddr = a->outbound_list_md.phys_addr;
1123         esas2r_write_register_dword(a, MU_OUT_LIST_ADDR_LO,
1124                                     lower_32_bits(ppaddr));
1125         esas2r_write_register_dword(a, MU_OUT_LIST_ADDR_HI,
1126                                     upper_32_bits(ppaddr));
1127         ppaddr = a->uncached_phys +
1128                  ((u8 *)a->outbound_copy - a->uncached);
1129         esas2r_write_register_dword(a, MU_OUT_LIST_COPY_PTR_LO,
1130                                     lower_32_bits(ppaddr));
1131         esas2r_write_register_dword(a, MU_OUT_LIST_COPY_PTR_HI,
1132                                     upper_32_bits(ppaddr));
1133
1134         /* reset the read and write pointers */
1135         *a->outbound_copy =
1136                 a->last_write =
1137                         a->last_read = a->list_size - 1;
1138         set_bit(AF_COMM_LIST_TOGGLE, &a->flags);
1139         esas2r_write_register_dword(a, MU_IN_LIST_WRITE, MU_ILW_TOGGLE |
1140                                     a->last_write);
1141         esas2r_write_register_dword(a, MU_OUT_LIST_COPY, MU_OLC_TOGGLE |
1142                                     a->last_write);
1143         esas2r_write_register_dword(a, MU_IN_LIST_READ, MU_ILR_TOGGLE |
1144                                     a->last_write);
1145         esas2r_write_register_dword(a, MU_OUT_LIST_WRITE,
1146                                     MU_OLW_TOGGLE | a->last_write);
1147
1148         /* configure the interface select fields */
1149         dw = esas2r_read_register_dword(a, MU_IN_LIST_IFC_CONFIG);
1150         dw &= ~(MU_ILIC_LIST | MU_ILIC_DEST);
1151         esas2r_write_register_dword(a, MU_IN_LIST_IFC_CONFIG,
1152                                     (dw | MU_ILIC_LIST_F0 | MU_ILIC_DEST_DDR));
1153         dw = esas2r_read_register_dword(a, MU_OUT_LIST_IFC_CONFIG);
1154         dw &= ~(MU_OLIC_LIST | MU_OLIC_SOURCE);
1155         esas2r_write_register_dword(a, MU_OUT_LIST_IFC_CONFIG,
1156                                     (dw | MU_OLIC_LIST_F0 |
1157                                      MU_OLIC_SOURCE_DDR));
1158
1159         /* finish configuring the communication lists */
1160         dw = esas2r_read_register_dword(a, MU_IN_LIST_CONFIG);
1161         dw &= ~(MU_ILC_ENTRY_MASK | MU_ILC_NUMBER_MASK);
1162         dw |= MU_ILC_ENTRY_4_DW | MU_ILC_DYNAMIC_SRC
1163               | (a->list_size << MU_ILC_NUMBER_SHIFT);
1164         esas2r_write_register_dword(a, MU_IN_LIST_CONFIG, dw);
1165         dw = esas2r_read_register_dword(a, MU_OUT_LIST_CONFIG);
1166         dw &= ~(MU_OLC_ENTRY_MASK | MU_OLC_NUMBER_MASK);
1167         dw |= MU_OLC_ENTRY_4_DW | (a->list_size << MU_OLC_NUMBER_SHIFT);
1168         esas2r_write_register_dword(a, MU_OUT_LIST_CONFIG, dw);
1169
1170         /*
1171          * notify the firmware that we're done setting up the communication
1172          * list registers.  wait here until the firmware is done configuring
1173          * its lists.  it will signal that it is done by enabling the lists.
1174          */
1175         esas2r_write_register_dword(a, MU_DOORBELL_IN, DRBL_MSG_IFC_INIT);
1176         starttime = jiffies_to_msecs(jiffies);
1177
1178         while (true) {
1179                 doorbell = esas2r_read_register_dword(a, MU_DOORBELL_OUT);
1180                 if (doorbell & DRBL_MSG_IFC_INIT) {
1181                         esas2r_write_register_dword(a, MU_DOORBELL_OUT,
1182                                                     doorbell);
1183                         break;
1184                 }
1185
1186                 schedule_timeout_interruptible(msecs_to_jiffies(100));
1187
1188                 if ((jiffies_to_msecs(jiffies) - starttime) > 3000) {
1189                         esas2r_hdebug(
1190                                 "timeout waiting for communication list init");
1191                         esas2r_bugon();
1192                         return esas2r_set_degraded_mode(a,
1193                                                         "timeout waiting for communication list init");
1194                 }
1195         }
1196
1197         /*
1198          * flag whether the firmware supports the power down doorbell.  we
1199          * determine this by reading the inbound doorbell enable mask.
1200          */
1201         doorbell = esas2r_read_register_dword(a, MU_DOORBELL_IN_ENB);
1202         if (doorbell & DRBL_POWER_DOWN)
1203                 set_bit(AF2_VDA_POWER_DOWN, &a->flags2);
1204         else
1205                 clear_bit(AF2_VDA_POWER_DOWN, &a->flags2);
1206
1207         /*
1208          * enable assertion of outbound queue and doorbell interrupts in the
1209          * main interrupt cause register.
1210          */
1211         esas2r_write_register_dword(a, MU_OUT_LIST_INT_MASK, MU_OLIS_MASK);
1212         esas2r_write_register_dword(a, MU_DOORBELL_OUT_ENB, DRBL_ENB_MASK);
1213         return true;
1214 }
1215
1216 /* Process the initialization message just completed and format the next one. */
1217 static bool esas2r_format_init_msg(struct esas2r_adapter *a,
1218                                    struct esas2r_request *rq)
1219 {
1220         u32 msg = a->init_msg;
1221         struct atto_vda_cfg_init *ci;
1222
1223         a->init_msg = 0;
1224
1225         switch (msg) {
1226         case ESAS2R_INIT_MSG_START:
1227         case ESAS2R_INIT_MSG_REINIT:
1228         {
1229                 struct timeval now;
1230                 do_gettimeofday(&now);
1231                 esas2r_hdebug("CFG init");
1232                 esas2r_build_cfg_req(a,
1233                                      rq,
1234                                      VDA_CFG_INIT,
1235                                      0,
1236                                      NULL);
1237                 ci = (struct atto_vda_cfg_init *)&rq->vrq->cfg.data.init;
1238                 ci->sgl_page_size = cpu_to_le32(sgl_page_size);
1239                 ci->epoch_time = cpu_to_le32(now.tv_sec);
1240                 rq->flags |= RF_FAILURE_OK;
1241                 a->init_msg = ESAS2R_INIT_MSG_INIT;
1242                 break;
1243         }
1244
1245         case ESAS2R_INIT_MSG_INIT:
1246                 if (rq->req_stat == RS_SUCCESS) {
1247                         u32 major;
1248                         u32 minor;
1249                         u16 fw_release;
1250
1251                         a->fw_version = le16_to_cpu(
1252                                 rq->func_rsp.cfg_rsp.vda_version);
1253                         a->fw_build = rq->func_rsp.cfg_rsp.fw_build;
1254                         fw_release = le16_to_cpu(
1255                                 rq->func_rsp.cfg_rsp.fw_release);
1256                         major = LOBYTE(fw_release);
1257                         minor = HIBYTE(fw_release);
1258                         a->fw_version += (major << 16) + (minor << 24);
1259                 } else {
1260                         esas2r_hdebug("FAILED");
1261                 }
1262
1263                 /*
1264                  * the 2.71 and earlier releases of R6xx firmware did not error
1265                  * unsupported config requests correctly.
1266                  */
1267
1268                 if ((test_bit(AF2_THUNDERBOLT, &a->flags2))
1269                     || (be32_to_cpu(a->fw_version) > 0x00524702)) {
1270                         esas2r_hdebug("CFG get init");
1271                         esas2r_build_cfg_req(a,
1272                                              rq,
1273                                              VDA_CFG_GET_INIT2,
1274                                              sizeof(struct atto_vda_cfg_init),
1275                                              NULL);
1276
1277                         rq->vrq->cfg.sg_list_offset = offsetof(
1278                                 struct atto_vda_cfg_req,
1279                                 data.sge);
1280                         rq->vrq->cfg.data.prde.ctl_len =
1281                                 cpu_to_le32(sizeof(struct atto_vda_cfg_init));
1282                         rq->vrq->cfg.data.prde.address = cpu_to_le64(
1283                                 rq->vrq_md->phys_addr +
1284                                 sizeof(union atto_vda_req));
1285                         rq->flags |= RF_FAILURE_OK;
1286                         a->init_msg = ESAS2R_INIT_MSG_GET_INIT;
1287                         break;
1288                 }
1289
1290         case ESAS2R_INIT_MSG_GET_INIT:
1291                 if (msg == ESAS2R_INIT_MSG_GET_INIT) {
1292                         ci = (struct atto_vda_cfg_init *)rq->data_buf;
1293                         if (rq->req_stat == RS_SUCCESS) {
1294                                 a->num_targets_backend =
1295                                         le32_to_cpu(ci->num_targets_backend);
1296                                 a->ioctl_tunnel =
1297                                         le32_to_cpu(ci->ioctl_tunnel);
1298                         } else {
1299                                 esas2r_hdebug("FAILED");
1300                         }
1301                 }
1302         /* fall through */
1303
1304         default:
1305                 rq->req_stat = RS_SUCCESS;
1306                 return false;
1307         }
1308         return true;
1309 }
1310
1311 /*
1312  * Perform initialization messages via the request queue.  Messages are
1313  * performed with interrupts disabled.
1314  */
1315 bool esas2r_init_msgs(struct esas2r_adapter *a)
1316 {
1317         bool success = true;
1318         struct esas2r_request *rq = &a->general_req;
1319
1320         esas2r_rq_init_request(rq, a);
1321         rq->comp_cb = esas2r_dummy_complete;
1322
1323         if (a->init_msg == 0)
1324                 a->init_msg = ESAS2R_INIT_MSG_REINIT;
1325
1326         while (a->init_msg) {
1327                 if (esas2r_format_init_msg(a, rq)) {
1328                         unsigned long flags;
1329                         while (true) {
1330                                 spin_lock_irqsave(&a->queue_lock, flags);
1331                                 esas2r_start_vda_request(a, rq);
1332                                 spin_unlock_irqrestore(&a->queue_lock, flags);
1333                                 esas2r_wait_request(a, rq);
1334                                 if (rq->req_stat != RS_PENDING)
1335                                         break;
1336                         }
1337                 }
1338
1339                 if (rq->req_stat == RS_SUCCESS
1340                     || ((rq->flags & RF_FAILURE_OK)
1341                         && rq->req_stat != RS_TIMEOUT))
1342                         continue;
1343
1344                 esas2r_log(ESAS2R_LOG_CRIT, "init message %x failed (%x, %x)",
1345                            a->init_msg, rq->req_stat, rq->flags);
1346                 a->init_msg = ESAS2R_INIT_MSG_START;
1347                 success = false;
1348                 break;
1349         }
1350
1351         esas2r_rq_destroy_request(rq, a);
1352         return success;
1353 }
1354
1355 /* Initialize the adapter chip */
1356 bool esas2r_init_adapter_hw(struct esas2r_adapter *a, bool init_poll)
1357 {
1358         bool rslt = false;
1359         struct esas2r_request *rq;
1360         u32 i;
1361
1362         if (test_bit(AF_DEGRADED_MODE, &a->flags))
1363                 goto exit;
1364
1365         if (!test_bit(AF_NVR_VALID, &a->flags)) {
1366                 if (!esas2r_nvram_read_direct(a))
1367                         esas2r_log(ESAS2R_LOG_WARN,
1368                                    "invalid/missing NVRAM parameters");
1369         }
1370
1371         if (!esas2r_init_msgs(a)) {
1372                 esas2r_set_degraded_mode(a, "init messages failed");
1373                 goto exit;
1374         }
1375
1376         /* The firmware is ready. */
1377         clear_bit(AF_DEGRADED_MODE, &a->flags);
1378         clear_bit(AF_CHPRST_PENDING, &a->flags);
1379
1380         /* Post all the async event requests */
1381         for (i = 0, rq = a->first_ae_req; i < num_ae_requests; i++, rq++)
1382                 esas2r_start_ae_request(a, rq);
1383
1384         if (!a->flash_rev[0])
1385                 esas2r_read_flash_rev(a);
1386
1387         if (!a->image_type[0])
1388                 esas2r_read_image_type(a);
1389
1390         if (a->fw_version == 0)
1391                 a->fw_rev[0] = 0;
1392         else
1393                 sprintf(a->fw_rev, "%1d.%02d",
1394                         (int)LOBYTE(HIWORD(a->fw_version)),
1395                         (int)HIBYTE(HIWORD(a->fw_version)));
1396
1397         esas2r_hdebug("firmware revision: %s", a->fw_rev);
1398
1399         if (test_bit(AF_CHPRST_DETECTED, &a->flags)
1400             && (test_bit(AF_FIRST_INIT, &a->flags))) {
1401                 esas2r_enable_chip_interrupts(a);
1402                 return true;
1403         }
1404
1405         /* initialize discovery */
1406         esas2r_disc_initialize(a);
1407
1408         /*
1409          * wait for the device wait time to expire here if requested.  this is
1410          * usually requested during initial driver load and possibly when
1411          * resuming from a low power state.  deferred device waiting will use
1412          * interrupts.  chip reset recovery always defers device waiting to
1413          * avoid being in a TASKLET too long.
1414          */
1415         if (init_poll) {
1416                 u32 currtime = a->disc_start_time;
1417                 u32 nexttick = 100;
1418                 u32 deltatime;
1419
1420                 /*
1421                  * Block Tasklets from getting scheduled and indicate this is
1422                  * polled discovery.
1423                  */
1424                 set_bit(AF_TASKLET_SCHEDULED, &a->flags);
1425                 set_bit(AF_DISC_POLLED, &a->flags);
1426
1427                 /*
1428                  * Temporarily bring the disable count to zero to enable
1429                  * deferred processing.  Note that the count is already zero
1430                  * after the first initialization.
1431                  */
1432                 if (test_bit(AF_FIRST_INIT, &a->flags))
1433                         atomic_dec(&a->disable_cnt);
1434
1435                 while (test_bit(AF_DISC_PENDING, &a->flags)) {
1436                         schedule_timeout_interruptible(msecs_to_jiffies(100));
1437
1438                         /*
1439                          * Determine the need for a timer tick based on the
1440                          * delta time between this and the last iteration of
1441                          * this loop.  We don't use the absolute time because
1442                          * then we would have to worry about when nexttick
1443                          * wraps and currtime hasn't yet.
1444                          */
1445                         deltatime = jiffies_to_msecs(jiffies) - currtime;
1446                         currtime += deltatime;
1447
1448                         /*
1449                          * Process any waiting discovery as long as the chip is
1450                          * up.  If a chip reset happens during initial polling,
1451                          * we have to make sure the timer tick processes the
1452                          * doorbell indicating the firmware is ready.
1453                          */
1454                         if (!test_bit(AF_CHPRST_PENDING, &a->flags))
1455                                 esas2r_disc_check_for_work(a);
1456
1457                         /* Simulate a timer tick. */
1458                         if (nexttick <= deltatime) {
1459
1460                                 /* Time for a timer tick */
1461                                 nexttick += 100;
1462                                 esas2r_timer_tick(a);
1463                         }
1464
1465                         if (nexttick > deltatime)
1466                                 nexttick -= deltatime;
1467
1468                         /* Do any deferred processing */
1469                         if (esas2r_is_tasklet_pending(a))
1470                                 esas2r_do_tasklet_tasks(a);
1471
1472                 }
1473
1474                 if (test_bit(AF_FIRST_INIT, &a->flags))
1475                         atomic_inc(&a->disable_cnt);
1476
1477                 clear_bit(AF_DISC_POLLED, &a->flags);
1478                 clear_bit(AF_TASKLET_SCHEDULED, &a->flags);
1479         }
1480
1481
1482         esas2r_targ_db_report_changes(a);
1483
1484         /*
1485          * For cases where (a) the initialization messages processing may
1486          * handle an interrupt for a port event and a discovery is waiting, but
1487          * we are not waiting for devices, or (b) the device wait time has been
1488          * exhausted but there is still discovery pending, start any leftover
1489          * discovery in interrupt driven mode.
1490          */
1491         esas2r_disc_start_waiting(a);
1492
1493         /* Enable chip interrupts */
1494         a->int_mask = ESAS2R_INT_STS_MASK;
1495         esas2r_enable_chip_interrupts(a);
1496         esas2r_enable_heartbeat(a);
1497         rslt = true;
1498
1499 exit:
1500         /*
1501          * Regardless of whether initialization was successful, certain things
1502          * need to get done before we exit.
1503          */
1504
1505         if (test_bit(AF_CHPRST_DETECTED, &a->flags) &&
1506             test_bit(AF_FIRST_INIT, &a->flags)) {
1507                 /*
1508                  * Reinitialization was performed during the first
1509                  * initialization.  Only clear the chip reset flag so the
1510                  * original device polling is not cancelled.
1511                  */
1512                 if (!rslt)
1513                         clear_bit(AF_CHPRST_PENDING, &a->flags);
1514         } else {
1515                 /* First initialization or a subsequent re-init is complete. */
1516                 if (!rslt) {
1517                         clear_bit(AF_CHPRST_PENDING, &a->flags);
1518                         clear_bit(AF_DISC_PENDING, &a->flags);
1519                 }
1520
1521
1522                 /* Enable deferred processing after the first initialization. */
1523                 if (test_bit(AF_FIRST_INIT, &a->flags)) {
1524                         clear_bit(AF_FIRST_INIT, &a->flags);
1525
1526                         if (atomic_dec_return(&a->disable_cnt) == 0)
1527                                 esas2r_do_deferred_processes(a);
1528                 }
1529         }
1530
1531         return rslt;
1532 }
1533
1534 void esas2r_reset_adapter(struct esas2r_adapter *a)
1535 {
1536         set_bit(AF_OS_RESET, &a->flags);
1537         esas2r_local_reset_adapter(a);
1538         esas2r_schedule_tasklet(a);
1539 }
1540
1541 void esas2r_reset_chip(struct esas2r_adapter *a)
1542 {
1543         if (!esas2r_is_adapter_present(a))
1544                 return;
1545
1546         /*
1547          * Before we reset the chip, save off the VDA core dump.  The VDA core
1548          * dump is located in the upper 512KB of the onchip SRAM.  Make sure
1549          * to not overwrite a previous crash that was saved.
1550          */
1551         if (test_bit(AF2_COREDUMP_AVAIL, &a->flags2) &&
1552             !test_bit(AF2_COREDUMP_SAVED, &a->flags2)) {
1553                 esas2r_read_mem_block(a,
1554                                       a->fw_coredump_buff,
1555                                       MW_DATA_ADDR_SRAM + 0x80000,
1556                                       ESAS2R_FWCOREDUMP_SZ);
1557
1558                 set_bit(AF2_COREDUMP_SAVED, &a->flags2);
1559         }
1560
1561         clear_bit(AF2_COREDUMP_AVAIL, &a->flags2);
1562
1563         /* Reset the chip */
1564         if (a->pcid->revision == MVR_FREY_B2)
1565                 esas2r_write_register_dword(a, MU_CTL_STATUS_IN_B2,
1566                                             MU_CTL_IN_FULL_RST2);
1567         else
1568                 esas2r_write_register_dword(a, MU_CTL_STATUS_IN,
1569                                             MU_CTL_IN_FULL_RST);
1570
1571
1572         /* Stall a little while to let the reset condition clear */
1573         mdelay(10);
1574 }
1575
1576 static void esas2r_power_down_notify_firmware(struct esas2r_adapter *a)
1577 {
1578         u32 starttime;
1579         u32 doorbell;
1580
1581         esas2r_write_register_dword(a, MU_DOORBELL_IN, DRBL_POWER_DOWN);
1582         starttime = jiffies_to_msecs(jiffies);
1583
1584         while (true) {
1585                 doorbell = esas2r_read_register_dword(a, MU_DOORBELL_OUT);
1586                 if (doorbell & DRBL_POWER_DOWN) {
1587                         esas2r_write_register_dword(a, MU_DOORBELL_OUT,
1588                                                     doorbell);
1589                         break;
1590                 }
1591
1592                 schedule_timeout_interruptible(msecs_to_jiffies(100));
1593
1594                 if ((jiffies_to_msecs(jiffies) - starttime) > 30000) {
1595                         esas2r_hdebug("Timeout waiting for power down");
1596                         break;
1597                 }
1598         }
1599 }
1600
1601 /*
1602  * Perform power management processing including managing device states, adapter
1603  * states, interrupts, and I/O.
1604  */
1605 void esas2r_power_down(struct esas2r_adapter *a)
1606 {
1607         set_bit(AF_POWER_MGT, &a->flags);
1608         set_bit(AF_POWER_DOWN, &a->flags);
1609
1610         if (!test_bit(AF_DEGRADED_MODE, &a->flags)) {
1611                 u32 starttime;
1612                 u32 doorbell;
1613
1614                 /*
1615                  * We are currently running OK and will be reinitializing later.
1616                  * increment the disable count to coordinate with
1617                  * esas2r_init_adapter.  We don't have to do this in degraded
1618                  * mode since we never enabled interrupts in the first place.
1619                  */
1620                 esas2r_disable_chip_interrupts(a);
1621                 esas2r_disable_heartbeat(a);
1622
1623                 /* wait for any VDA activity to clear before continuing */
1624                 esas2r_write_register_dword(a, MU_DOORBELL_IN,
1625                                             DRBL_MSG_IFC_DOWN);
1626                 starttime = jiffies_to_msecs(jiffies);
1627
1628                 while (true) {
1629                         doorbell =
1630                                 esas2r_read_register_dword(a, MU_DOORBELL_OUT);
1631                         if (doorbell & DRBL_MSG_IFC_DOWN) {
1632                                 esas2r_write_register_dword(a, MU_DOORBELL_OUT,
1633                                                             doorbell);
1634                                 break;
1635                         }
1636
1637                         schedule_timeout_interruptible(msecs_to_jiffies(100));
1638
1639                         if ((jiffies_to_msecs(jiffies) - starttime) > 3000) {
1640                                 esas2r_hdebug(
1641                                         "timeout waiting for interface down");
1642                                 break;
1643                         }
1644                 }
1645
1646                 /*
1647                  * For versions of firmware that support it tell them the driver
1648                  * is powering down.
1649                  */
1650                 if (test_bit(AF2_VDA_POWER_DOWN, &a->flags2))
1651                         esas2r_power_down_notify_firmware(a);
1652         }
1653
1654         /* Suspend I/O processing. */
1655         set_bit(AF_OS_RESET, &a->flags);
1656         set_bit(AF_DISC_PENDING, &a->flags);
1657         set_bit(AF_CHPRST_PENDING, &a->flags);
1658
1659         esas2r_process_adapter_reset(a);
1660
1661         /* Remove devices now that I/O is cleaned up. */
1662         a->prev_dev_cnt = esas2r_targ_db_get_tgt_cnt(a);
1663         esas2r_targ_db_remove_all(a, false);
1664 }
1665
1666 /*
1667  * Perform power management processing including managing device states, adapter
1668  * states, interrupts, and I/O.
1669  */
1670 bool esas2r_power_up(struct esas2r_adapter *a, bool init_poll)
1671 {
1672         bool ret;
1673
1674         clear_bit(AF_POWER_DOWN, &a->flags);
1675         esas2r_init_pci_cfg_space(a);
1676         set_bit(AF_FIRST_INIT, &a->flags);
1677         atomic_inc(&a->disable_cnt);
1678
1679         /* reinitialize the adapter */
1680         ret = esas2r_check_adapter(a);
1681         if (!esas2r_init_adapter_hw(a, init_poll))
1682                 ret = false;
1683
1684         /* send the reset asynchronous event */
1685         esas2r_send_reset_ae(a, true);
1686
1687         /* clear this flag after initialization. */
1688         clear_bit(AF_POWER_MGT, &a->flags);
1689         return ret;
1690 }
1691
1692 bool esas2r_is_adapter_present(struct esas2r_adapter *a)
1693 {
1694         if (test_bit(AF_NOT_PRESENT, &a->flags))
1695                 return false;
1696
1697         if (esas2r_read_register_dword(a, MU_DOORBELL_OUT) == 0xFFFFFFFF) {
1698                 set_bit(AF_NOT_PRESENT, &a->flags);
1699
1700                 return false;
1701         }
1702         return true;
1703 }
1704
1705 const char *esas2r_get_model_name(struct esas2r_adapter *a)
1706 {
1707         switch (a->pcid->subsystem_device) {
1708         case ATTO_ESAS_R680:
1709                 return "ATTO ExpressSAS R680";
1710
1711         case ATTO_ESAS_R608:
1712                 return "ATTO ExpressSAS R608";
1713
1714         case ATTO_ESAS_R60F:
1715                 return "ATTO ExpressSAS R60F";
1716
1717         case ATTO_ESAS_R6F0:
1718                 return "ATTO ExpressSAS R6F0";
1719
1720         case ATTO_ESAS_R644:
1721                 return "ATTO ExpressSAS R644";
1722
1723         case ATTO_ESAS_R648:
1724                 return "ATTO ExpressSAS R648";
1725
1726         case ATTO_TSSC_3808:
1727                 return "ATTO ThunderStream SC 3808D";
1728
1729         case ATTO_TSSC_3808E:
1730                 return "ATTO ThunderStream SC 3808E";
1731
1732         case ATTO_TLSH_1068:
1733                 return "ATTO ThunderLink SH 1068";
1734         }
1735
1736         return "ATTO SAS Controller";
1737 }
1738
1739 const char *esas2r_get_model_name_short(struct esas2r_adapter *a)
1740 {
1741         switch (a->pcid->subsystem_device) {
1742         case ATTO_ESAS_R680:
1743                 return "R680";
1744
1745         case ATTO_ESAS_R608:
1746                 return "R608";
1747
1748         case ATTO_ESAS_R60F:
1749                 return "R60F";
1750
1751         case ATTO_ESAS_R6F0:
1752                 return "R6F0";
1753
1754         case ATTO_ESAS_R644:
1755                 return "R644";
1756
1757         case ATTO_ESAS_R648:
1758                 return "R648";
1759
1760         case ATTO_TSSC_3808:
1761                 return "SC 3808D";
1762
1763         case ATTO_TSSC_3808E:
1764                 return "SC 3808E";
1765
1766         case ATTO_TLSH_1068:
1767                 return "SH 1068";
1768         }
1769
1770         return "unknown";
1771 }