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) >
 817                      PCI_EXP_DEVCTL_READRQ_512B) {
 818                         esas2r_log(ESAS2R_LOG_INFO,
 819                                    "max read request size > 512B");
 820
 821                         devcontrol &= ~PCI_EXP_DEVCTL_READRQ;
 822                         devcontrol |= PCI_EXP_DEVCTL_READRQ_512B;
 823                         pci_write_config_word(a->pcid,
 824                                               pcie_cap_reg + PCI_EXP_DEVCTL,
 825                                               devcontrol);
 826                 }
 827         }
 828 }
 829
 830 /*
 831  * Determine the organization of the uncached data area and
 832  * finish initializing the adapter structure
 833  */
 834 bool esas2r_init_adapter_struct(struct esas2r_adapter *a,
 835                                 void **uncached_area)
 836 {
 837         u32 i;
 838         u8 *high;
 839         struct esas2r_inbound_list_source_entry *element;
 840         struct esas2r_request *rq;
 841         struct esas2r_mem_desc *sgl;
 842
 843         spin_lock_init(&a->sg_list_lock);
 844         spin_lock_init(&a->mem_lock);
 845         spin_lock_init(&a->queue_lock);
 846
 847         a->targetdb_end = &a->targetdb[ESAS2R_MAX_TARGETS];
 848
 849         if (!alloc_vda_req(a, &a->general_req)) {
 850                 esas2r_hdebug(
 851                         "failed to allocate a VDA request for the general req!");
 852                 return false;
 853         }
 854
 855         /* allocate requests for asynchronous events */
 856         a->first_ae_req =
 857                 kzalloc(num_ae_requests * sizeof(struct esas2r_request),
 858                         GFP_KERNEL);
 859
 860         if (a->first_ae_req == NULL) {
 861                 esas2r_log(ESAS2R_LOG_CRIT,
 862                            "failed to allocate memory for asynchronous events");
 863                 return false;
 864         }
 865
 866         /* allocate the S/G list memory descriptors */
 867         a->sg_list_mds = kzalloc(
 868                 num_sg_lists * sizeof(struct esas2r_mem_desc), GFP_KERNEL);
 869
 870         if (a->sg_list_mds == NULL) {
 871                 esas2r_log(ESAS2R_LOG_CRIT,
 872                            "failed to allocate memory for s/g list descriptors");
 873                 return false;
 874         }
 875
 876         /* allocate the request table */
 877         a->req_table =
 878                 kzalloc((num_requests + num_ae_requests +
 879                          1) * sizeof(struct esas2r_request *), GFP_KERNEL);
 880
 881         if (a->req_table == NULL) {
 882                 esas2r_log(ESAS2R_LOG_CRIT,
 883                            "failed to allocate memory for the request table");
 884                 return false;
 885         }
 886
 887         /* initialize PCI configuration space */
 888         esas2r_init_pci_cfg_space(a);
 889
 890         /*
 891          * the thunder_stream boards all have a serial flash part that has a
 892          * different base address on the AHB bus.
 893          */
 894         if ((a->pcid->subsystem_vendor == ATTO_VENDOR_ID)
 895             && (a->pcid->subsystem_device & ATTO_SSDID_TBT))
 896                 a->flags2 |= AF2_THUNDERBOLT;
 897
 898         if (test_bit(AF2_THUNDERBOLT, &a->flags2))
 899                 a->flags2 |= AF2_SERIAL_FLASH;
 900
 901         if (a->pcid->subsystem_device == ATTO_TLSH_1068)
 902                 a->flags2 |= AF2_THUNDERLINK;
 903
 904         /* Uncached Area */
 905         high = (u8 *)*uncached_area;
 906
 907         /* initialize the scatter/gather table pages */
 908
 909         for (i = 0, sgl = a->sg_list_mds; i < num_sg_lists; i++, sgl++) {
 910                 sgl->size = sgl_page_size;
 911
 912                 list_add_tail(&sgl->next_desc, &a->free_sg_list_head);
 913
 914                 if (!esas2r_initmem_alloc(a, sgl, ESAS2R_SGL_ALIGN)) {
 915                         /* Allow the driver to load if the minimum count met. */
 916                         if (i < NUM_SGL_MIN)
 917                                 return false;
 918                         break;
 919                 }
 920         }
 921
 922         /* compute the size of the lists */
 923         a->list_size = num_requests + ESAS2R_LIST_EXTRA;
 924
 925         /* allocate the inbound list */
 926         a->inbound_list_md.size = a->list_size *
 927                                   sizeof(struct
 928                                          esas2r_inbound_list_source_entry);
 929
 930         if (!esas2r_initmem_alloc(a, &a->inbound_list_md, ESAS2R_LIST_ALIGN)) {
 931                 esas2r_hdebug("failed to allocate IB list");
 932                 return false;
 933         }
 934
 935         /* allocate the outbound list */
 936         a->outbound_list_md.size = a->list_size *
 937                                    sizeof(struct atto_vda_ob_rsp);
 938
 939         if (!esas2r_initmem_alloc(a, &a->outbound_list_md,
 940                                   ESAS2R_LIST_ALIGN)) {
 941                 esas2r_hdebug("failed to allocate IB list");
 942                 return false;
 943         }
 944
 945         /* allocate the NVRAM structure */
 946         a->nvram = (struct esas2r_sas_nvram *)high;
 947         high += sizeof(struct esas2r_sas_nvram);
 948
 949         /* allocate the discovery buffer */
 950         a->disc_buffer = high;
 951         high += ESAS2R_DISC_BUF_LEN;
 952         high = PTR_ALIGN(high, 8);
 953
 954         /* allocate the outbound list copy pointer */
 955         a->outbound_copy = (u32 volatile *)high;
 956         high += sizeof(u32);
 957
 958         if (!test_bit(AF_NVR_VALID, &a->flags))
 959                 esas2r_nvram_set_defaults(a);
 960
 961         /* update the caller's uncached memory area pointer */
 962         *uncached_area = (void *)high;
 963
 964         /* initialize the allocated memory */
 965         if (test_bit(AF_FIRST_INIT, &a->flags)) {
 966                 memset(a->req_table, 0,
 967                        (num_requests + num_ae_requests +
 968                         1) * sizeof(struct esas2r_request *));
 969
 970                 esas2r_targ_db_initialize(a);
 971
 972                 /* prime parts of the inbound list */
 973                 element =
 974                         (struct esas2r_inbound_list_source_entry *)a->
 975                         inbound_list_md.
 976                         virt_addr;
 977
 978                 for (i = 0; i < a->list_size; i++) {
 979                         element->address = 0;
 980                         element->reserved = 0;
 981                         element->length = cpu_to_le32(HWILSE_INTERFACE_F0
 982                                                       | (sizeof(union
 983                                                                 atto_vda_req)
 984                                                          /
 985                                                          sizeof(u32)));
 986                         element++;
 987                 }
 988
 989                 /* init the AE requests */
 990                 for (rq = a->first_ae_req, i = 0; i < num_ae_requests; rq++,
 991                      i++) {
 992                         INIT_LIST_HEAD(&rq->req_list);
 993                         if (!alloc_vda_req(a, rq)) {
 994                                 esas2r_hdebug(
 995                                         "failed to allocate a VDA request!");
 996                                 return false;
 997                         }
 998
 999                         esas2r_rq_init_request(rq, a);
1000
1001                         /* override the completion function */
1002                         rq->comp_cb = esas2r_ae_complete;
1003                 }
1004         }
1005
1006         return true;
1007 }
1008
1009 /* This code will verify that the chip is operational. */
1010 bool esas2r_check_adapter(struct esas2r_adapter *a)
1011 {
1012         u32 starttime;
1013         u32 doorbell;
1014         u64 ppaddr;
1015         u32 dw;
1016
1017         /*
1018          * if the chip reset detected flag is set, we can bypass a bunch of
1019          * stuff.
1020          */
1021         if (test_bit(AF_CHPRST_DETECTED, &a->flags))
1022                 goto skip_chip_reset;
1023
1024         /*
1025          * BEFORE WE DO ANYTHING, disable the chip interrupts!  the boot driver
1026          * may have left them enabled or we may be recovering from a fault.
1027          */
1028         esas2r_write_register_dword(a, MU_INT_MASK_OUT, ESAS2R_INT_DIS_MASK);
1029         esas2r_flush_register_dword(a, MU_INT_MASK_OUT);
1030
1031         /*
1032          * wait for the firmware to become ready by forcing an interrupt and
1033          * waiting for a response.
1034          */
1035         starttime = jiffies_to_msecs(jiffies);
1036
1037         while (true) {
1038                 esas2r_force_interrupt(a);
1039                 doorbell = esas2r_read_register_dword(a, MU_DOORBELL_OUT);
1040                 if (doorbell == 0xFFFFFFFF) {
1041                         /*
1042                          * Give the firmware up to two seconds to enable
1043                          * register access after a reset.
1044                          */
1045                         if ((jiffies_to_msecs(jiffies) - starttime) > 2000)
1046                                 return esas2r_set_degraded_mode(a,
1047                                                                 "unable to access registers");
1048                 } else if (doorbell & DRBL_FORCE_INT) {
1049                         u32 ver = (doorbell & DRBL_FW_VER_MSK);
1050
1051                         /*
1052                          * This driver supports version 0 and version 1 of
1053                          * the API
1054                          */
1055                         esas2r_write_register_dword(a, MU_DOORBELL_OUT,
1056                                                     doorbell);
1057
1058                         if (ver == DRBL_FW_VER_0) {
1059                                 set_bit(AF_LEGACY_SGE_MODE, &a->flags);
1060
1061                                 a->max_vdareq_size = 128;
1062                                 a->build_sgl = esas2r_build_sg_list_sge;
1063                         } else if (ver == DRBL_FW_VER_1) {
1064                                 clear_bit(AF_LEGACY_SGE_MODE, &a->flags);
1065
1066                                 a->max_vdareq_size = 1024;
1067                                 a->build_sgl = esas2r_build_sg_list_prd;
1068                         } else {
1069                                 return esas2r_set_degraded_mode(a,
1070                                                                 "unknown firmware version");
1071                         }
1072                         break;
1073                 }
1074
1075                 schedule_timeout_interruptible(msecs_to_jiffies(100));
1076
1077                 if ((jiffies_to_msecs(jiffies) - starttime) > 180000) {
1078                         esas2r_hdebug("FW ready TMO");
1079                         esas2r_bugon();
1080
1081                         return esas2r_set_degraded_mode(a,
1082                                                         "firmware start has timed out");
1083                 }
1084         }
1085
1086         /* purge any asynchronous events since we will repost them later */
1087         esas2r_write_register_dword(a, MU_DOORBELL_IN, DRBL_MSG_IFC_DOWN);
1088         starttime = jiffies_to_msecs(jiffies);
1089
1090         while (true) {
1091                 doorbell = esas2r_read_register_dword(a, MU_DOORBELL_OUT);
1092                 if (doorbell & DRBL_MSG_IFC_DOWN) {
1093                         esas2r_write_register_dword(a, MU_DOORBELL_OUT,
1094                                                     doorbell);
1095                         break;
1096                 }
1097
1098                 schedule_timeout_interruptible(msecs_to_jiffies(50));
1099
1100                 if ((jiffies_to_msecs(jiffies) - starttime) > 3000) {
1101                         esas2r_hdebug("timeout waiting for interface down");
1102                         break;
1103                 }
1104         }
1105 skip_chip_reset:
1106         /*
1107          * first things first, before we go changing any of these registers
1108          * disable the communication lists.
1109          */
1110         dw = esas2r_read_register_dword(a, MU_IN_LIST_CONFIG);
1111         dw &= ~MU_ILC_ENABLE;
1112         esas2r_write_register_dword(a, MU_IN_LIST_CONFIG, dw);
1113         dw = esas2r_read_register_dword(a, MU_OUT_LIST_CONFIG);
1114         dw &= ~MU_OLC_ENABLE;
1115         esas2r_write_register_dword(a, MU_OUT_LIST_CONFIG, dw);
1116
1117         /* configure the communication list addresses */
1118         ppaddr = a->inbound_list_md.phys_addr;
1119         esas2r_write_register_dword(a, MU_IN_LIST_ADDR_LO,
1120                                     lower_32_bits(ppaddr));
1121         esas2r_write_register_dword(a, MU_IN_LIST_ADDR_HI,
1122                                     upper_32_bits(ppaddr));
1123         ppaddr = a->outbound_list_md.phys_addr;
1124         esas2r_write_register_dword(a, MU_OUT_LIST_ADDR_LO,
1125                                     lower_32_bits(ppaddr));
1126         esas2r_write_register_dword(a, MU_OUT_LIST_ADDR_HI,
1127                                     upper_32_bits(ppaddr));
1128         ppaddr = a->uncached_phys +
1129                  ((u8 *)a->outbound_copy - a->uncached);
1130         esas2r_write_register_dword(a, MU_OUT_LIST_COPY_PTR_LO,
1131                                     lower_32_bits(ppaddr));
1132         esas2r_write_register_dword(a, MU_OUT_LIST_COPY_PTR_HI,
1133                                     upper_32_bits(ppaddr));
1134
1135         /* reset the read and write pointers */
1136         *a->outbound_copy =
1137                 a->last_write =
1138                         a->last_read = a->list_size - 1;
1139         set_bit(AF_COMM_LIST_TOGGLE, &a->flags);
1140         esas2r_write_register_dword(a, MU_IN_LIST_WRITE, MU_ILW_TOGGLE |
1141                                     a->last_write);
1142         esas2r_write_register_dword(a, MU_OUT_LIST_COPY, MU_OLC_TOGGLE |
1143                                     a->last_write);
1144         esas2r_write_register_dword(a, MU_IN_LIST_READ, MU_ILR_TOGGLE |
1145                                     a->last_write);
1146         esas2r_write_register_dword(a, MU_OUT_LIST_WRITE,
1147                                     MU_OLW_TOGGLE | a->last_write);
1148
1149         /* configure the interface select fields */
1150         dw = esas2r_read_register_dword(a, MU_IN_LIST_IFC_CONFIG);
1151         dw &= ~(MU_ILIC_LIST | MU_ILIC_DEST);
1152         esas2r_write_register_dword(a, MU_IN_LIST_IFC_CONFIG,
1153                                     (dw | MU_ILIC_LIST_F0 | MU_ILIC_DEST_DDR));
1154         dw = esas2r_read_register_dword(a, MU_OUT_LIST_IFC_CONFIG);
1155         dw &= ~(MU_OLIC_LIST | MU_OLIC_SOURCE);
1156         esas2r_write_register_dword(a, MU_OUT_LIST_IFC_CONFIG,
1157                                     (dw | MU_OLIC_LIST_F0 |
1158                                      MU_OLIC_SOURCE_DDR));
1159
1160         /* finish configuring the communication lists */
1161         dw = esas2r_read_register_dword(a, MU_IN_LIST_CONFIG);
1162         dw &= ~(MU_ILC_ENTRY_MASK | MU_ILC_NUMBER_MASK);
1163         dw |= MU_ILC_ENTRY_4_DW | MU_ILC_DYNAMIC_SRC
1164               | (a->list_size << MU_ILC_NUMBER_SHIFT);
1165         esas2r_write_register_dword(a, MU_IN_LIST_CONFIG, dw);
1166         dw = esas2r_read_register_dword(a, MU_OUT_LIST_CONFIG);
1167         dw &= ~(MU_OLC_ENTRY_MASK | MU_OLC_NUMBER_MASK);
1168         dw |= MU_OLC_ENTRY_4_DW | (a->list_size << MU_OLC_NUMBER_SHIFT);
1169         esas2r_write_register_dword(a, MU_OUT_LIST_CONFIG, dw);
1170
1171         /*
1172          * notify the firmware that we're done setting up the communication
1173          * list registers.  wait here until the firmware is done configuring
1174          * its lists.  it will signal that it is done by enabling the lists.
1175          */
1176         esas2r_write_register_dword(a, MU_DOORBELL_IN, DRBL_MSG_IFC_INIT);
1177         starttime = jiffies_to_msecs(jiffies);
1178
1179         while (true) {
1180                 doorbell = esas2r_read_register_dword(a, MU_DOORBELL_OUT);
1181                 if (doorbell & DRBL_MSG_IFC_INIT) {
1182                         esas2r_write_register_dword(a, MU_DOORBELL_OUT,
1183                                                     doorbell);
1184                         break;
1185                 }
1186
1187                 schedule_timeout_interruptible(msecs_to_jiffies(100));
1188
1189                 if ((jiffies_to_msecs(jiffies) - starttime) > 3000) {
1190                         esas2r_hdebug(
1191                                 "timeout waiting for communication list init");
1192                         esas2r_bugon();
1193                         return esas2r_set_degraded_mode(a,
1194                                                         "timeout waiting for communication list init");
1195                 }
1196         }
1197
1198         /*
1199          * flag whether the firmware supports the power down doorbell.  we
1200          * determine this by reading the inbound doorbell enable mask.
1201          */
1202         doorbell = esas2r_read_register_dword(a, MU_DOORBELL_IN_ENB);
1203         if (doorbell & DRBL_POWER_DOWN)
1204                 set_bit(AF2_VDA_POWER_DOWN, &a->flags2);
1205         else
1206                 clear_bit(AF2_VDA_POWER_DOWN, &a->flags2);
1207
1208         /*
1209          * enable assertion of outbound queue and doorbell interrupts in the
1210          * main interrupt cause register.
1211          */
1212         esas2r_write_register_dword(a, MU_OUT_LIST_INT_MASK, MU_OLIS_MASK);
1213         esas2r_write_register_dword(a, MU_DOORBELL_OUT_ENB, DRBL_ENB_MASK);
1214         return true;
1215 }
1216
1217 /* Process the initialization message just completed and format the next one. */
1218 static bool esas2r_format_init_msg(struct esas2r_adapter *a,
1219                                    struct esas2r_request *rq)
1220 {
1221         u32 msg = a->init_msg;
1222         struct atto_vda_cfg_init *ci;
1223
1224         a->init_msg = 0;
1225
1226         switch (msg) {
1227         case ESAS2R_INIT_MSG_START:
1228         case ESAS2R_INIT_MSG_REINIT:
1229         {
1230                 struct timeval now;
1231                 do_gettimeofday(&now);
1232                 esas2r_hdebug("CFG init");
1233                 esas2r_build_cfg_req(a,
1234                                      rq,
1235                                      VDA_CFG_INIT,
1236                                      0,
1237                                      NULL);
1238                 ci = (struct atto_vda_cfg_init *)&rq->vrq->cfg.data.init;
1239                 ci->sgl_page_size = cpu_to_le32(sgl_page_size);
1240                 ci->epoch_time = cpu_to_le32(now.tv_sec);
1241                 rq->flags |= RF_FAILURE_OK;
1242                 a->init_msg = ESAS2R_INIT_MSG_INIT;
1243                 break;
1244         }
1245
1246         case ESAS2R_INIT_MSG_INIT:
1247                 if (rq->req_stat == RS_SUCCESS) {
1248                         u32 major;
1249                         u32 minor;
1250                         u16 fw_release;
1251
1252                         a->fw_version = le16_to_cpu(
1253                                 rq->func_rsp.cfg_rsp.vda_version);
1254                         a->fw_build = rq->func_rsp.cfg_rsp.fw_build;
1255                         fw_release = le16_to_cpu(
1256                                 rq->func_rsp.cfg_rsp.fw_release);
1257                         major = LOBYTE(fw_release);
1258                         minor = HIBYTE(fw_release);
1259                         a->fw_version += (major << 16) + (minor << 24);
1260                 } else {
1261                         esas2r_hdebug("FAILED");
1262                 }
1263
1264                 /*
1265                  * the 2.71 and earlier releases of R6xx firmware did not error
1266                  * unsupported config requests correctly.
1267                  */
1268
1269                 if ((test_bit(AF2_THUNDERBOLT, &a->flags2))
1270                     || (be32_to_cpu(a->fw_version) > 0x00524702)) {
1271                         esas2r_hdebug("CFG get init");
1272                         esas2r_build_cfg_req(a,
1273                                              rq,
1274                                              VDA_CFG_GET_INIT2,
1275                                              sizeof(struct atto_vda_cfg_init),
1276                                              NULL);
1277
1278                         rq->vrq->cfg.sg_list_offset = offsetof(
1279                                 struct atto_vda_cfg_req,
1280                                 data.sge);
1281                         rq->vrq->cfg.data.prde.ctl_len =
1282                                 cpu_to_le32(sizeof(struct atto_vda_cfg_init));
1283                         rq->vrq->cfg.data.prde.address = cpu_to_le64(
1284                                 rq->vrq_md->phys_addr +
1285                                 sizeof(union atto_vda_req));
1286                         rq->flags |= RF_FAILURE_OK;
1287                         a->init_msg = ESAS2R_INIT_MSG_GET_INIT;
1288                         break;
1289                 }
1290
1291         case ESAS2R_INIT_MSG_GET_INIT:
1292                 if (msg == ESAS2R_INIT_MSG_GET_INIT) {
1293                         ci = (struct atto_vda_cfg_init *)rq->data_buf;
1294                         if (rq->req_stat == RS_SUCCESS) {
1295                                 a->num_targets_backend =
1296                                         le32_to_cpu(ci->num_targets_backend);
1297                                 a->ioctl_tunnel =
1298                                         le32_to_cpu(ci->ioctl_tunnel);
1299                         } else {
1300                                 esas2r_hdebug("FAILED");
1301                         }
1302                 }
1303         /* fall through */
1304
1305         default:
1306                 rq->req_stat = RS_SUCCESS;
1307                 return false;
1308         }
1309         return true;
1310 }
1311
1312 /*
1313  * Perform initialization messages via the request queue.  Messages are
1314  * performed with interrupts disabled.
1315  */
1316 bool esas2r_init_msgs(struct esas2r_adapter *a)
1317 {
1318         bool success = true;
1319         struct esas2r_request *rq = &a->general_req;
1320
1321         esas2r_rq_init_request(rq, a);
1322         rq->comp_cb = esas2r_dummy_complete;
1323
1324         if (a->init_msg == 0)
1325                 a->init_msg = ESAS2R_INIT_MSG_REINIT;
1326
1327         while (a->init_msg) {
1328                 if (esas2r_format_init_msg(a, rq)) {
1329                         unsigned long flags;
1330                         while (true) {
1331                                 spin_lock_irqsave(&a->queue_lock, flags);
1332                                 esas2r_start_vda_request(a, rq);
1333                                 spin_unlock_irqrestore(&a->queue_lock, flags);
1334                                 esas2r_wait_request(a, rq);
1335                                 if (rq->req_stat != RS_PENDING)
1336                                         break;
1337                         }
1338                 }
1339
1340                 if (rq->req_stat == RS_SUCCESS
1341                     || ((rq->flags & RF_FAILURE_OK)
1342                         && rq->req_stat != RS_TIMEOUT))
1343                         continue;
1344
1345                 esas2r_log(ESAS2R_LOG_CRIT, "init message %x failed (%x, %x)",
1346                            a->init_msg, rq->req_stat, rq->flags);
1347                 a->init_msg = ESAS2R_INIT_MSG_START;
1348                 success = false;
1349                 break;
1350         }
1351
1352         esas2r_rq_destroy_request(rq, a);
1353         return success;
1354 }
1355
1356 /* Initialize the adapter chip */
1357 bool esas2r_init_adapter_hw(struct esas2r_adapter *a, bool init_poll)
1358 {
1359         bool rslt = false;
1360         struct esas2r_request *rq;
1361         u32 i;
1362
1363         if (test_bit(AF_DEGRADED_MODE, &a->flags))
1364                 goto exit;
1365
1366         if (!test_bit(AF_NVR_VALID, &a->flags)) {
1367                 if (!esas2r_nvram_read_direct(a))
1368                         esas2r_log(ESAS2R_LOG_WARN,
1369                                    "invalid/missing NVRAM parameters");
1370         }
1371
1372         if (!esas2r_init_msgs(a)) {
1373                 esas2r_set_degraded_mode(a, "init messages failed");
1374                 goto exit;
1375         }
1376
1377         /* The firmware is ready. */
1378         clear_bit(AF_DEGRADED_MODE, &a->flags);
1379         clear_bit(AF_CHPRST_PENDING, &a->flags);
1380
1381         /* Post all the async event requests */
1382         for (i = 0, rq = a->first_ae_req; i < num_ae_requests; i++, rq++)
1383                 esas2r_start_ae_request(a, rq);
1384
1385         if (!a->flash_rev[0])
1386                 esas2r_read_flash_rev(a);
1387
1388         if (!a->image_type[0])
1389                 esas2r_read_image_type(a);
1390
1391         if (a->fw_version == 0)
1392                 a->fw_rev[0] = 0;
1393         else
1394                 sprintf(a->fw_rev, "%1d.%02d",
1395                         (int)LOBYTE(HIWORD(a->fw_version)),
1396                         (int)HIBYTE(HIWORD(a->fw_version)));
1397
1398         esas2r_hdebug("firmware revision: %s", a->fw_rev);
1399
1400         if (test_bit(AF_CHPRST_DETECTED, &a->flags)
1401             && (test_bit(AF_FIRST_INIT, &a->flags))) {
1402                 esas2r_enable_chip_interrupts(a);
1403                 return true;
1404         }
1405
1406         /* initialize discovery */
1407         esas2r_disc_initialize(a);
1408
1409         /*
1410          * wait for the device wait time to expire here if requested.  this is
1411          * usually requested during initial driver load and possibly when
1412          * resuming from a low power state.  deferred device waiting will use
1413          * interrupts.  chip reset recovery always defers device waiting to
1414          * avoid being in a TASKLET too long.
1415          */
1416         if (init_poll) {
1417                 u32 currtime = a->disc_start_time;
1418                 u32 nexttick = 100;
1419                 u32 deltatime;
1420
1421                 /*
1422                  * Block Tasklets from getting scheduled and indicate this is
1423                  * polled discovery.
1424                  */
1425                 set_bit(AF_TASKLET_SCHEDULED, &a->flags);
1426                 set_bit(AF_DISC_POLLED, &a->flags);
1427
1428                 /*
1429                  * Temporarily bring the disable count to zero to enable
1430                  * deferred processing.  Note that the count is already zero
1431                  * after the first initialization.
1432                  */
1433                 if (test_bit(AF_FIRST_INIT, &a->flags))
1434                         atomic_dec(&a->disable_cnt);
1435
1436                 while (test_bit(AF_DISC_PENDING, &a->flags)) {
1437                         schedule_timeout_interruptible(msecs_to_jiffies(100));
1438
1439                         /*
1440                          * Determine the need for a timer tick based on the
1441                          * delta time between this and the last iteration of
1442                          * this loop.  We don't use the absolute time because
1443                          * then we would have to worry about when nexttick
1444                          * wraps and currtime hasn't yet.
1445                          */
1446                         deltatime = jiffies_to_msecs(jiffies) - currtime;
1447                         currtime += deltatime;
1448
1449                         /*
1450                          * Process any waiting discovery as long as the chip is
1451                          * up.  If a chip reset happens during initial polling,
1452                          * we have to make sure the timer tick processes the
1453                          * doorbell indicating the firmware is ready.
1454                          */
1455                         if (!test_bit(AF_CHPRST_PENDING, &a->flags))
1456                                 esas2r_disc_check_for_work(a);
1457
1458                         /* Simulate a timer tick. */
1459                         if (nexttick <= deltatime) {
1460
1461                                 /* Time for a timer tick */
1462                                 nexttick += 100;
1463                                 esas2r_timer_tick(a);
1464                         }
1465
1466                         if (nexttick > deltatime)
1467                                 nexttick -= deltatime;
1468
1469                         /* Do any deferred processing */
1470                         if (esas2r_is_tasklet_pending(a))
1471                                 esas2r_do_tasklet_tasks(a);
1472
1473                 }
1474
1475                 if (test_bit(AF_FIRST_INIT, &a->flags))
1476                         atomic_inc(&a->disable_cnt);
1477
1478                 clear_bit(AF_DISC_POLLED, &a->flags);
1479                 clear_bit(AF_TASKLET_SCHEDULED, &a->flags);
1480         }
1481
1482
1483         esas2r_targ_db_report_changes(a);
1484
1485         /*
1486          * For cases where (a) the initialization messages processing may
1487          * handle an interrupt for a port event and a discovery is waiting, but
1488          * we are not waiting for devices, or (b) the device wait time has been
1489          * exhausted but there is still discovery pending, start any leftover
1490          * discovery in interrupt driven mode.
1491          */
1492         esas2r_disc_start_waiting(a);
1493
1494         /* Enable chip interrupts */
1495         a->int_mask = ESAS2R_INT_STS_MASK;
1496         esas2r_enable_chip_interrupts(a);
1497         esas2r_enable_heartbeat(a);
1498         rslt = true;
1499
1500 exit:
1501         /*
1502          * Regardless of whether initialization was successful, certain things
1503          * need to get done before we exit.
1504          */
1505
1506         if (test_bit(AF_CHPRST_DETECTED, &a->flags) &&
1507             test_bit(AF_FIRST_INIT, &a->flags)) {
1508                 /*
1509                  * Reinitialization was performed during the first
1510                  * initialization.  Only clear the chip reset flag so the
1511                  * original device polling is not cancelled.
1512                  */
1513                 if (!rslt)
1514                         clear_bit(AF_CHPRST_PENDING, &a->flags);
1515         } else {
1516                 /* First initialization or a subsequent re-init is complete. */
1517                 if (!rslt) {
1518                         clear_bit(AF_CHPRST_PENDING, &a->flags);
1519                         clear_bit(AF_DISC_PENDING, &a->flags);
1520                 }
1521
1522
1523                 /* Enable deferred processing after the first initialization. */
1524                 if (test_bit(AF_FIRST_INIT, &a->flags)) {
1525                         clear_bit(AF_FIRST_INIT, &a->flags);
1526
1527                         if (atomic_dec_return(&a->disable_cnt) == 0)
1528                                 esas2r_do_deferred_processes(a);
1529                 }
1530         }
1531
1532         return rslt;
1533 }
1534
1535 void esas2r_reset_adapter(struct esas2r_adapter *a)
1536 {
1537         set_bit(AF_OS_RESET, &a->flags);
1538         esas2r_local_reset_adapter(a);
1539         esas2r_schedule_tasklet(a);
1540 }
1541
1542 void esas2r_reset_chip(struct esas2r_adapter *a)
1543 {
1544         if (!esas2r_is_adapter_present(a))
1545                 return;
1546
1547         /*
1548          * Before we reset the chip, save off the VDA core dump.  The VDA core
1549          * dump is located in the upper 512KB of the onchip SRAM.  Make sure
1550          * to not overwrite a previous crash that was saved.
1551          */
1552         if (test_bit(AF2_COREDUMP_AVAIL, &a->flags2) &&
1553             !test_bit(AF2_COREDUMP_SAVED, &a->flags2)) {
1554                 esas2r_read_mem_block(a,
1555                                       a->fw_coredump_buff,
1556                                       MW_DATA_ADDR_SRAM + 0x80000,
1557                                       ESAS2R_FWCOREDUMP_SZ);
1558
1559                 set_bit(AF2_COREDUMP_SAVED, &a->flags2);
1560         }
1561
1562         clear_bit(AF2_COREDUMP_AVAIL, &a->flags2);
1563
1564         /* Reset the chip */
1565         if (a->pcid->revision == MVR_FREY_B2)
1566                 esas2r_write_register_dword(a, MU_CTL_STATUS_IN_B2,
1567                                             MU_CTL_IN_FULL_RST2);
1568         else
1569                 esas2r_write_register_dword(a, MU_CTL_STATUS_IN,
1570                                             MU_CTL_IN_FULL_RST);
1571
1572
1573         /* Stall a little while to let the reset condition clear */
1574         mdelay(10);
1575 }
1576
1577 static void esas2r_power_down_notify_firmware(struct esas2r_adapter *a)
1578 {
1579         u32 starttime;
1580         u32 doorbell;
1581
1582         esas2r_write_register_dword(a, MU_DOORBELL_IN, DRBL_POWER_DOWN);
1583         starttime = jiffies_to_msecs(jiffies);
1584
1585         while (true) {
1586                 doorbell = esas2r_read_register_dword(a, MU_DOORBELL_OUT);
1587                 if (doorbell & DRBL_POWER_DOWN) {
1588                         esas2r_write_register_dword(a, MU_DOORBELL_OUT,
1589                                                     doorbell);
1590                         break;
1591                 }
1592
1593                 schedule_timeout_interruptible(msecs_to_jiffies(100));
1594
1595                 if ((jiffies_to_msecs(jiffies) - starttime) > 30000) {
1596                         esas2r_hdebug("Timeout waiting for power down");
1597                         break;
1598                 }
1599         }
1600 }
1601
1602 /*
1603  * Perform power management processing including managing device states, adapter
1604  * states, interrupts, and I/O.
1605  */
1606 void esas2r_power_down(struct esas2r_adapter *a)
1607 {
1608         set_bit(AF_POWER_MGT, &a->flags);
1609         set_bit(AF_POWER_DOWN, &a->flags);
1610
1611         if (!test_bit(AF_DEGRADED_MODE, &a->flags)) {
1612                 u32 starttime;
1613                 u32 doorbell;
1614
1615                 /*
1616                  * We are currently running OK and will be reinitializing later.
1617                  * increment the disable count to coordinate with
1618                  * esas2r_init_adapter.  We don't have to do this in degraded
1619                  * mode since we never enabled interrupts in the first place.
1620                  */
1621                 esas2r_disable_chip_interrupts(a);
1622                 esas2r_disable_heartbeat(a);
1623
1624                 /* wait for any VDA activity to clear before continuing */
1625                 esas2r_write_register_dword(a, MU_DOORBELL_IN,
1626                                             DRBL_MSG_IFC_DOWN);
1627                 starttime = jiffies_to_msecs(jiffies);
1628
1629                 while (true) {
1630                         doorbell =
1631                                 esas2r_read_register_dword(a, MU_DOORBELL_OUT);
1632                         if (doorbell & DRBL_MSG_IFC_DOWN) {
1633                                 esas2r_write_register_dword(a, MU_DOORBELL_OUT,
1634                                                             doorbell);
1635                                 break;
1636                         }
1637
1638                         schedule_timeout_interruptible(msecs_to_jiffies(100));
1639
1640                         if ((jiffies_to_msecs(jiffies) - starttime) > 3000) {
1641                                 esas2r_hdebug(
1642                                         "timeout waiting for interface down");
1643                                 break;
1644                         }
1645                 }
1646
1647                 /*
1648                  * For versions of firmware that support it tell them the driver
1649                  * is powering down.
1650                  */
1651                 if (test_bit(AF2_VDA_POWER_DOWN, &a->flags2))
1652                         esas2r_power_down_notify_firmware(a);
1653         }
1654
1655         /* Suspend I/O processing. */
1656         set_bit(AF_OS_RESET, &a->flags);
1657         set_bit(AF_DISC_PENDING, &a->flags);
1658         set_bit(AF_CHPRST_PENDING, &a->flags);
1659
1660         esas2r_process_adapter_reset(a);
1661
1662         /* Remove devices now that I/O is cleaned up. */
1663         a->prev_dev_cnt = esas2r_targ_db_get_tgt_cnt(a);
1664         esas2r_targ_db_remove_all(a, false);
1665 }
1666
1667 /*
1668  * Perform power management processing including managing device states, adapter
1669  * states, interrupts, and I/O.
1670  */
1671 bool esas2r_power_up(struct esas2r_adapter *a, bool init_poll)
1672 {
1673         bool ret;
1674
1675         clear_bit(AF_POWER_DOWN, &a->flags);
1676         esas2r_init_pci_cfg_space(a);
1677         set_bit(AF_FIRST_INIT, &a->flags);
1678         atomic_inc(&a->disable_cnt);
1679
1680         /* reinitialize the adapter */
1681         ret = esas2r_check_adapter(a);
1682         if (!esas2r_init_adapter_hw(a, init_poll))
1683                 ret = false;
1684
1685         /* send the reset asynchronous event */
1686         esas2r_send_reset_ae(a, true);
1687
1688         /* clear this flag after initialization. */
1689         clear_bit(AF_POWER_MGT, &a->flags);
1690         return ret;
1691 }
1692
1693 bool esas2r_is_adapter_present(struct esas2r_adapter *a)
1694 {
1695         if (test_bit(AF_NOT_PRESENT, &a->flags))
1696                 return false;
1697
1698         if (esas2r_read_register_dword(a, MU_DOORBELL_OUT) == 0xFFFFFFFF) {
1699                 set_bit(AF_NOT_PRESENT, &a->flags);
1700
1701                 return false;
1702         }
1703         return true;
1704 }
1705
1706 const char *esas2r_get_model_name(struct esas2r_adapter *a)
1707 {
1708         switch (a->pcid->subsystem_device) {
1709         case ATTO_ESAS_R680:
1710                 return "ATTO ExpressSAS R680";
1711
1712         case ATTO_ESAS_R608:
1713                 return "ATTO ExpressSAS R608";
1714
1715         case ATTO_ESAS_R60F:
1716                 return "ATTO ExpressSAS R60F";
1717
1718         case ATTO_ESAS_R6F0:
1719                 return "ATTO ExpressSAS R6F0";
1720
1721         case ATTO_ESAS_R644:
1722                 return "ATTO ExpressSAS R644";
1723
1724         case ATTO_ESAS_R648:
1725                 return "ATTO ExpressSAS R648";
1726
1727         case ATTO_TSSC_3808:
1728                 return "ATTO ThunderStream SC 3808D";
1729
1730         case ATTO_TSSC_3808E:
1731                 return "ATTO ThunderStream SC 3808E";
1732
1733         case ATTO_TLSH_1068:
1734                 return "ATTO ThunderLink SH 1068";
1735         }
1736
1737         return "ATTO SAS Controller";
1738 }
1739
1740 const char *esas2r_get_model_name_short(struct esas2r_adapter *a)
1741 {
1742         switch (a->pcid->subsystem_device) {
1743         case ATTO_ESAS_R680:
1744                 return "R680";
1745
1746         case ATTO_ESAS_R608:
1747                 return "R608";
1748
1749         case ATTO_ESAS_R60F:
1750                 return "R60F";
1751
1752         case ATTO_ESAS_R6F0:
1753                 return "R6F0";
1754
1755         case ATTO_ESAS_R644:
1756                 return "R644";
1757
1758         case ATTO_ESAS_R648:
1759                 return "R648";
1760
1761         case ATTO_TSSC_3808:
1762                 return "SC 3808D";
1763
1764         case ATTO_TSSC_3808E:
1765                 return "SC 3808E";
1766
1767         case ATTO_TLSH_1068:
1768                 return "SH 1068";
1769         }
1770
1771         return "unknown";
1772 }