drivers/scsi/esas2r/esas2r_init.c

   1 /*
   2  *  linux/drivers/scsi/esas2r/esas2r_init.c
   3  *      For use with ATTO ExpressSAS R6xx SAS/SATA RAID controllers
   4  *
   5  *  Copyright (c) 2001-2013 ATTO Technology, Inc.
   6  *  (mailto:linuxdrivers@attotech.com)mpt3sas/mpt3sas_trigger_diag.
   7  *
   8  * This program is free software; you can redistribute it and/or
   9  * modify it under the terms of the GNU General Public License
  10  * as published by the Free Software Foundation; either version 2
  11  * of the License, or (at your option) any later version.
  12  *
  13  * This program is distributed in the hope that it will be useful,
  14  * but WITHOUT ANY WARRANTY; without even the implied warranty of
  15  * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
  16  * GNU General Public License for more details.
  17  *
  18  * NO WARRANTY
  19  * THE PROGRAM IS PROVIDED ON AN "AS IS" BASIS, WITHOUT WARRANTIES OR
  20  * CONDITIONS OF ANY KIND, EITHER EXPRESS OR IMPLIED INCLUDING, WITHOUT
  21  * LIMITATION, ANY WARRANTIES OR CONDITIONS OF TITLE, NON-INFRINGEMENT,
  22  * MERCHANTABILITY OR FITNESS FOR A PARTICULAR PURPOSE. Each Recipient is
  23  * solely responsible for determining the appropriateness of using and
  24  * distributing the Program and assumes all risks associated with its
  25  * exercise of rights under this Agreement, including but not limited to
  26  * the risks and costs of program errors, damage to or loss of data,
  27  * programs or equipment, and unavailability or interruption of operations.
  28  *
  29  * DISCLAIMER OF LIABILITY
  30  * NEITHER RECIPIENT NOR ANY CONTRIBUTORS SHALL HAVE ANY LIABILITY FOR ANY
  31  * DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
  32  * DAMAGES (INCLUDING WITHOUT LIMITATION LOST PROFITS), HOWEVER CAUSED AND
  33  * ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR
  34  * TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE
  35  * USE OR DISTRIBUTION OF THE PROGRAM OR THE EXERCISE OF ANY RIGHTS GRANTED
  36  * HEREUNDER, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGES
  37  *
  38  * You should have received a copy of the GNU General Public License
  39  * along with this program; if not, write to the Free Software
  40  * Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA  02110-1301,
  41  * USA.
  42  */
  43
  44 #include "esas2r.h"
  45
  46 static bool esas2r_initmem_alloc(struct esas2r_adapter *a,
  47                                  struct esas2r_mem_desc *mem_desc,
  48                                  u32 align)
  49 {
  50         mem_desc->esas2r_param = mem_desc->size + align;
  51         mem_desc->virt_addr = NULL;
  52         mem_desc->phys_addr = 0;
  53         mem_desc->esas2r_data = dma_alloc_coherent(&a->pcid->dev,
  54                                                    (size_t)mem_desc->
  55                                                    esas2r_param,
  56                                                    (dma_addr_t *)&mem_desc->
  57                                                    phys_addr,
  58                                                    GFP_KERNEL);
  59
  60         if (mem_desc->esas2r_data == NULL) {
  61                 esas2r_log(ESAS2R_LOG_CRIT,
  62                            "failed to allocate %lu bytes of consistent memory!",
  63                            (long
  64                             unsigned
  65                             int)mem_desc->esas2r_param);
  66                 return false;
  67         }
  68
  69         mem_desc->virt_addr = PTR_ALIGN(mem_desc->esas2r_data, align);
  70         mem_desc->phys_addr = ALIGN(mem_desc->phys_addr, align);
  71         memset(mem_desc->virt_addr, 0, mem_desc->size);
  72         return true;
  73 }
  74
  75 static void esas2r_initmem_free(struct esas2r_adapter *a,
  76                                 struct esas2r_mem_desc *mem_desc)
  77 {
  78         if (mem_desc->virt_addr == NULL)
  79                 return;
  80
  81         /*
  82          * Careful!  phys_addr and virt_addr may have been adjusted from the
  83          * original allocation in order to return the desired alignment.  That
  84          * means we have to use the original address (in esas2r_data) and size
  85          * (esas2r_param) and calculate the original physical address based on
  86          * the difference between the requested and actual allocation size.
  87          */
  88         if (mem_desc->phys_addr) {
  89                 int unalign = ((u8 *)mem_desc->virt_addr) -
  90                               ((u8 *)mem_desc->esas2r_data);
  91
  92                 dma_free_coherent(&a->pcid->dev,
  93                                   (size_t)mem_desc->esas2r_param,
  94                                   mem_desc->esas2r_data,
  95                                   (dma_addr_t)(mem_desc->phys_addr - unalign));
  96         } else {
  97                 kfree(mem_desc->esas2r_data);
  98         }
  99
 100         mem_desc->virt_addr = NULL;
 101 }
 102
 103 static bool alloc_vda_req(struct esas2r_adapter *a,
 104                           struct esas2r_request *rq)
 105 {
 106         struct esas2r_mem_desc *memdesc = kzalloc(
 107                 sizeof(struct esas2r_mem_desc), GFP_KERNEL);
 108
 109         if (memdesc == NULL) {
 110                 esas2r_hdebug("could not alloc mem for vda request memdesc\n");
 111                 return false;
 112         }
 113
 114         memdesc->size = sizeof(union atto_vda_req) +
 115                         ESAS2R_DATA_BUF_LEN;
 116
 117         if (!esas2r_initmem_alloc(a, memdesc, 256)) {
 118                 esas2r_hdebug("could not alloc mem for vda request\n");
 119                 kfree(memdesc);
 120                 return false;
 121         }
 122
 123         a->num_vrqs++;
 124         list_add(&memdesc->next_desc, &a->vrq_mds_head);
 125
 126         rq->vrq_md = memdesc;
 127         rq->vrq = (union atto_vda_req *)memdesc->virt_addr;
 128         rq->vrq->scsi.handle = a->num_vrqs;
 129
 130         return true;
 131 }
 132
 133 static void esas2r_unmap_regions(struct esas2r_adapter *a)
 134 {
 135         if (a->regs)
 136                 iounmap((void __iomem *)a->regs);
 137
 138         a->regs = NULL;
 139
 140         pci_release_region(a->pcid, 2);
 141
 142         if (a->data_window)
 143                 iounmap((void __iomem *)a->data_window);
 144
 145         a->data_window = NULL;
 146
 147         pci_release_region(a->pcid, 0);
 148 }
 149
 150 static int esas2r_map_regions(struct esas2r_adapter *a)
 151 {
 152         int error;
 153
 154         a->regs = NULL;
 155         a->data_window = NULL;
 156
 157         error = pci_request_region(a->pcid, 2, a->name);
 158         if (error != 0) {
 159                 esas2r_log(ESAS2R_LOG_CRIT,
 160                            "pci_request_region(2) failed, error %d",
 161                            error);
 162
 163                 return error;
 164         }
 165
 166         a->regs = (void __force *)ioremap(pci_resource_start(a->pcid, 2),
 167                                           pci_resource_len(a->pcid, 2));
 168         if (a->regs == NULL) {
 169                 esas2r_log(ESAS2R_LOG_CRIT,
 170                            "ioremap failed for regs mem region\n");
 171                 pci_release_region(a->pcid, 2);
 172                 return -EFAULT;
 173         }
 174
 175         error = pci_request_region(a->pcid, 0, a->name);
 176         if (error != 0) {
 177                 esas2r_log(ESAS2R_LOG_CRIT,
 178                            "pci_request_region(2) failed, error %d",
 179                            error);
 180                 esas2r_unmap_regions(a);
 181                 return error;
 182         }
 183
 184         a->data_window = (void __force *)ioremap(pci_resource_start(a->pcid,
 185                                                                     0),
 186                                                  pci_resource_len(a->pcid, 0));
 187         if (a->data_window == NULL) {
 188                 esas2r_log(ESAS2R_LOG_CRIT,
 189                            "ioremap failed for data_window mem region\n");
 190                 esas2r_unmap_regions(a);
 191                 return -EFAULT;
 192         }
 193
 194         return 0;
 195 }
 196
 197 static void esas2r_setup_interrupts(struct esas2r_adapter *a, int intr_mode)
 198 {
 199         int i;
 200
 201         /* Set up interrupt mode based on the requested value */
 202         switch (intr_mode) {
 203         case INTR_MODE_LEGACY:
 204 use_legacy_interrupts:
 205                 a->intr_mode = INTR_MODE_LEGACY;
 206                 break;
 207
 208         case INTR_MODE_MSI:
 209                 i = pci_enable_msi(a->pcid);
 210                 if (i != 0) {
 211                         esas2r_log(ESAS2R_LOG_WARN,
 212                                    "failed to enable MSI for adapter %d, "
 213                                    "falling back to legacy interrupts "
 214                                    "(err=%d)", a->index,
 215                                    i);
 216                         goto use_legacy_interrupts;
 217                 }
 218                 a->intr_mode = INTR_MODE_MSI;
 219                 set_bit(AF2_MSI_ENABLED, &a->flags2);
 220                 break;
 221
 222
 223         default:
 224                 esas2r_log(ESAS2R_LOG_WARN,
 225                            "unknown interrupt_mode %d requested, "
 226                            "falling back to legacy interrupt",
 227                            interrupt_mode);
 228                 goto use_legacy_interrupts;
 229         }
 230 }
 231
 232 static void esas2r_claim_interrupts(struct esas2r_adapter *a)
 233 {
 234         unsigned long flags = 0;
 235
 236         if (a->intr_mode == INTR_MODE_LEGACY)
 237                 flags |= IRQF_SHARED;
 238
 239         esas2r_log(ESAS2R_LOG_INFO,
 240                    "esas2r_claim_interrupts irq=%d (%p, %s, %lx)",
 241                    a->pcid->irq, a, a->name, flags);
 242
 243         if (request_irq(a->pcid->irq,
 244                         (a->intr_mode ==
 245                          INTR_MODE_LEGACY) ? esas2r_interrupt :
 246                         esas2r_msi_interrupt,
 247                         flags,
 248                         a->name,
 249                         a)) {
 250                 esas2r_log(ESAS2R_LOG_CRIT, "unable to request IRQ %02X",
 251                            a->pcid->irq);
 252                 return;
 253         }
 254
 255         set_bit(AF2_IRQ_CLAIMED, &a->flags2);
 256         esas2r_log(ESAS2R_LOG_INFO,
 257                    "claimed IRQ %d flags: 0x%lx",
 258                    a->pcid->irq, flags);
 259 }
 260
 261 int esas2r_init_adapter(struct Scsi_Host *host, struct pci_dev *pcid,
 262                         int index)
 263 {
 264         struct esas2r_adapter *a;
 265         u64 bus_addr = 0;
 266         int i;
 267         void *next_uncached;
 268         struct esas2r_request *first_request, *last_request;
 269         bool dma64 = false;
 270
 271         if (index >= MAX_ADAPTERS) {
 272                 esas2r_log(ESAS2R_LOG_CRIT,
 273                            "tried to init invalid adapter index %u!",
 274                            index);
 275                 return 0;
 276         }
 277
 278         if (esas2r_adapters[index]) {
 279                 esas2r_log(ESAS2R_LOG_CRIT,
 280                            "tried to init existing adapter index %u!",
 281                            index);
 282                 return 0;
 283         }
 284
 285         a = (struct esas2r_adapter *)host->hostdata;
 286         memset(a, 0, sizeof(struct esas2r_adapter));
 287         a->pcid = pcid;
 288         a->host = host;
 289
 290         if (sizeof(dma_addr_t) > 4 &&
 291             dma_get_required_mask(&pcid->dev) > DMA_BIT_MASK(32) &&
 292             !dma_set_mask_and_coherent(&pcid->dev, DMA_BIT_MASK(64)))
 293                 dma64 = true;
 294
 295         if (!dma64 && dma_set_mask_and_coherent(&pcid->dev, DMA_BIT_MASK(32))) {
 296                 esas2r_log(ESAS2R_LOG_CRIT, "failed to set DMA mask");
 297                 esas2r_kill_adapter(index);
 298                 return 0;
 299         }
 300
 301         esas2r_log_dev(ESAS2R_LOG_INFO, &pcid->dev,
 302                        "%s-bit PCI addressing enabled\n", dma64 ? "64" : "32");
 303
 304         esas2r_adapters[index] = a;
 305         sprintf(a->name, ESAS2R_DRVR_NAME "_%02d", index);
 306         esas2r_debug("new adapter %p, name %s", a, a->name);
 307         spin_lock_init(&a->request_lock);
 308         spin_lock_init(&a->fw_event_lock);
 309         mutex_init(&a->fm_api_mutex);
 310         mutex_init(&a->fs_api_mutex);
 311         sema_init(&a->nvram_semaphore, 1);
 312
 313         esas2r_fw_event_off(a);
 314         snprintf(a->fw_event_q_name, ESAS2R_KOBJ_NAME_LEN, "esas2r/%d",
 315                  a->index);
 316         a->fw_event_q = create_singlethread_workqueue(a->fw_event_q_name);
 317
 318         init_waitqueue_head(&a->buffered_ioctl_waiter);
 319         init_waitqueue_head(&a->nvram_waiter);
 320         init_waitqueue_head(&a->fm_api_waiter);
 321         init_waitqueue_head(&a->fs_api_waiter);
 322         init_waitqueue_head(&a->vda_waiter);
 323
 324         INIT_LIST_HEAD(&a->general_req.req_list);
 325         INIT_LIST_HEAD(&a->active_list);
 326         INIT_LIST_HEAD(&a->defer_list);
 327         INIT_LIST_HEAD(&a->free_sg_list_head);
 328         INIT_LIST_HEAD(&a->avail_request);
 329         INIT_LIST_HEAD(&a->vrq_mds_head);
 330         INIT_LIST_HEAD(&a->fw_event_list);
 331
 332         first_request = (struct esas2r_request *)((u8 *)(a + 1));
 333
 334         for (last_request = first_request, i = 1; i < num_requests;
 335              last_request++, i++) {
 336                 INIT_LIST_HEAD(&last_request->req_list);
 337                 list_add_tail(&last_request->comp_list, &a->avail_request);
 338                 if (!alloc_vda_req(a, last_request)) {
 339                         esas2r_log(ESAS2R_LOG_CRIT,
 340                                    "failed to allocate a VDA request!");
 341                         esas2r_kill_adapter(index);
 342                         return 0;
 343                 }
 344         }
 345
 346         esas2r_debug("requests: %p to %p (%d, %d)", first_request,
 347                      last_request,
 348                      sizeof(*first_request),
 349                      num_requests);
 350
 351         if (esas2r_map_regions(a) != 0) {
 352                 esas2r_log(ESAS2R_LOG_CRIT, "could not map PCI regions!");
 353                 esas2r_kill_adapter(index);
 354                 return 0;
 355         }
 356
 357         a->index = index;
 358
 359         /* interrupts will be disabled until we are done with init */
 360         atomic_inc(&a->dis_ints_cnt);
 361         atomic_inc(&a->disable_cnt);
 362         set_bit(AF_CHPRST_PENDING, &a->flags);
 363         set_bit(AF_DISC_PENDING, &a->flags);
 364         set_bit(AF_FIRST_INIT, &a->flags);
 365         set_bit(AF_LEGACY_SGE_MODE, &a->flags);
 366
 367         a->init_msg = ESAS2R_INIT_MSG_START;
 368         a->max_vdareq_size = 128;
 369         a->build_sgl = esas2r_build_sg_list_sge;
 370
 371         esas2r_setup_interrupts(a, interrupt_mode);
 372
 373         a->uncached_size = esas2r_get_uncached_size(a);
 374         a->uncached = dma_alloc_coherent(&pcid->dev,
 375                                          (size_t)a->uncached_size,
 376                                          (dma_addr_t *)&bus_addr,
 377                                          GFP_KERNEL);
 378         if (a->uncached == NULL) {
 379                 esas2r_log(ESAS2R_LOG_CRIT,
 380                            "failed to allocate %d bytes of consistent memory!",
 381                            a->uncached_size);
 382                 esas2r_kill_adapter(index);
 383                 return 0;
 384         }
 385
 386         a->uncached_phys = bus_addr;
 387
 388         esas2r_debug("%d bytes uncached memory allocated @ %p (%x:%x)",
 389                      a->uncached_size,
 390                      a->uncached,
 391                      upper_32_bits(bus_addr),
 392                      lower_32_bits(bus_addr));
 393         memset(a->uncached, 0, a->uncached_size);
 394         next_uncached = a->uncached;
 395
 396         if (!esas2r_init_adapter_struct(a,
 397                                         &next_uncached)) {
 398                 esas2r_log(ESAS2R_LOG_CRIT,
 399                            "failed to initialize adapter structure (2)!");
 400                 esas2r_kill_adapter(index);
 401                 return 0;
 402         }
 403
 404         tasklet_init(&a->tasklet,
 405                      esas2r_adapter_tasklet,
 406                      (unsigned long)a);
 407
 408         /*
 409          * Disable chip interrupts to prevent spurious interrupts
 410          * until we claim the IRQ.
 411          */
 412         esas2r_disable_chip_interrupts(a);
 413         esas2r_check_adapter(a);
 414
 415         if (!esas2r_init_adapter_hw(a, true))
 416                 esas2r_log(ESAS2R_LOG_CRIT, "failed to initialize hardware!");
 417         else
 418                 esas2r_debug("esas2r_init_adapter ok");
 419
 420         esas2r_claim_interrupts(a);
 421
 422         if (test_bit(AF2_IRQ_CLAIMED, &a->flags2))
 423                 esas2r_enable_chip_interrupts(a);
 424
 425         set_bit(AF2_INIT_DONE, &a->flags2);
 426         if (!test_bit(AF_DEGRADED_MODE, &a->flags))
 427                 esas2r_kickoff_timer(a);
 428         esas2r_debug("esas2r_init_adapter done for %p (%d)",
 429                      a, a->disable_cnt);
 430
 431         return 1;
 432 }
 433
 434 static void esas2r_adapter_power_down(struct esas2r_adapter *a,
 435                                       int power_management)
 436 {
 437         struct esas2r_mem_desc *memdesc, *next;
 438
 439         if ((test_bit(AF2_INIT_DONE, &a->flags2))
 440             &&  (!test_bit(AF_DEGRADED_MODE, &a->flags))) {
 441                 if (!power_management) {
 442                         del_timer_sync(&a->timer);
 443                         tasklet_kill(&a->tasklet);
 444                 }
 445                 esas2r_power_down(a);
 446
 447                 /*
 448                  * There are versions of firmware that do not handle the sync
 449                  * cache command correctly.  Stall here to ensure that the
 450                  * cache is lazily flushed.
 451                  */
 452                 mdelay(500);
 453                 esas2r_debug("chip halted");
 454         }
 455
 456         /* Remove sysfs binary files */
 457         if (a->sysfs_fw_created) {
 458                 sysfs_remove_bin_file(&a->host->shost_dev.kobj, &bin_attr_fw);
 459                 a->sysfs_fw_created = 0;
 460         }
 461
 462         if (a->sysfs_fs_created) {
 463                 sysfs_remove_bin_file(&a->host->shost_dev.kobj, &bin_attr_fs);
 464                 a->sysfs_fs_created = 0;
 465         }
 466
 467         if (a->sysfs_vda_created) {
 468                 sysfs_remove_bin_file(&a->host->shost_dev.kobj, &bin_attr_vda);
 469                 a->sysfs_vda_created = 0;
 470         }
 471
 472         if (a->sysfs_hw_created) {
 473                 sysfs_remove_bin_file(&a->host->shost_dev.kobj, &bin_attr_hw);
 474                 a->sysfs_hw_created = 0;
 475         }
 476
 477         if (a->sysfs_live_nvram_created) {
 478                 sysfs_remove_bin_file(&a->host->shost_dev.kobj,
 479                                       &bin_attr_live_nvram);
 480                 a->sysfs_live_nvram_created = 0;
 481         }
 482
 483         if (a->sysfs_default_nvram_created) {
 484                 sysfs_remove_bin_file(&a->host->shost_dev.kobj,
 485                                       &bin_attr_default_nvram);
 486                 a->sysfs_default_nvram_created = 0;
 487         }
 488
 489         /* Clean up interrupts */
 490         if (test_bit(AF2_IRQ_CLAIMED, &a->flags2)) {
 491                 esas2r_log_dev(ESAS2R_LOG_INFO,
 492                                &(a->pcid->dev),
 493                                "free_irq(%d) called", a->pcid->irq);
 494
 495                 free_irq(a->pcid->irq, a);
 496                 esas2r_debug("IRQ released");
 497                 clear_bit(AF2_IRQ_CLAIMED, &a->flags2);
 498         }
 499
 500         if (test_bit(AF2_MSI_ENABLED, &a->flags2)) {
 501                 pci_disable_msi(a->pcid);
 502                 clear_bit(AF2_MSI_ENABLED, &a->flags2);
 503                 esas2r_debug("MSI disabled");
 504         }
 505
 506         if (a->inbound_list_md.virt_addr)
 507                 esas2r_initmem_free(a, &a->inbound_list_md);
 508
 509         if (a->outbound_list_md.virt_addr)
 510                 esas2r_initmem_free(a, &a->outbound_list_md);
 511
 512         list_for_each_entry_safe(memdesc, next, &a->free_sg_list_head,
 513                                  next_desc) {
 514                 esas2r_initmem_free(a, memdesc);
 515         }
 516
 517         /* Following frees everything allocated via alloc_vda_req */
 518         list_for_each_entry_safe(memdesc, next, &a->vrq_mds_head, next_desc) {
 519                 esas2r_initmem_free(a, memdesc);
 520                 list_del(&memdesc->next_desc);
 521                 kfree(memdesc);
 522         }
 523
 524         kfree(a->first_ae_req);
 525         a->first_ae_req = NULL;
 526
 527         kfree(a->sg_list_mds);
 528         a->sg_list_mds = NULL;
 529
 530         kfree(a->req_table);
 531         a->req_table = NULL;
 532
 533         if (a->regs) {
 534                 esas2r_unmap_regions(a);
 535                 a->regs = NULL;
 536                 a->data_window = NULL;
 537                 esas2r_debug("regions unmapped");
 538         }
 539 }
 540
 541 /* Release/free allocated resources for specified adapters. */
 542 void esas2r_kill_adapter(int i)
 543 {
 544         struct esas2r_adapter *a = esas2r_adapters[i];
 545
 546         if (a) {
 547                 unsigned long flags;
 548                 struct workqueue_struct *wq;
 549                 esas2r_debug("killing adapter %p [%d] ", a, i);
 550                 esas2r_fw_event_off(a);
 551                 esas2r_adapter_power_down(a, 0);
 552                 if (esas2r_buffered_ioctl &&
 553                     (a->pcid == esas2r_buffered_ioctl_pcid)) {
 554                         dma_free_coherent(&a->pcid->dev,
 555                                           (size_t)esas2r_buffered_ioctl_size,
 556                                           esas2r_buffered_ioctl,
 557                                           esas2r_buffered_ioctl_addr);
 558                         esas2r_buffered_ioctl = NULL;
 559                 }
 560
 561                 if (a->vda_buffer) {
 562                         dma_free_coherent(&a->pcid->dev,
 563                                           (size_t)VDA_MAX_BUFFER_SIZE,
 564                                           a->vda_buffer,
 565                                           (dma_addr_t)a->ppvda_buffer);
 566                         a->vda_buffer = NULL;
 567                 }
 568                 if (a->fs_api_buffer) {
 569                         dma_free_coherent(&a->pcid->dev,
 570                                           (size_t)a->fs_api_buffer_size,
 571                                           a->fs_api_buffer,
 572                                           (dma_addr_t)a->ppfs_api_buffer);
 573                         a->fs_api_buffer = NULL;
 574                 }
 575
 576                 kfree(a->local_atto_ioctl);
 577                 a->local_atto_ioctl = NULL;
 578
 579                 spin_lock_irqsave(&a->fw_event_lock, flags);
 580                 wq = a->fw_event_q;
 581                 a->fw_event_q = NULL;
 582                 spin_unlock_irqrestore(&a->fw_event_lock, flags);
 583                 if (wq)
 584                         destroy_workqueue(wq);
 585
 586                 if (a->uncached) {
 587                         dma_free_coherent(&a->pcid->dev,
 588                                           (size_t)a->uncached_size,
 589                                           a->uncached,
 590                                           (dma_addr_t)a->uncached_phys);
 591                         a->uncached = NULL;
 592                         esas2r_debug("uncached area freed");
 593                 }
 594
 595                 esas2r_log_dev(ESAS2R_LOG_INFO,
 596                                &(a->pcid->dev),
 597                                "pci_disable_device() called.  msix_enabled: %d "
 598                                "msi_enabled: %d irq: %d pin: %d",
 599                                a->pcid->msix_enabled,
 600                                a->pcid->msi_enabled,
 601                                a->pcid->irq,
 602                                a->pcid->pin);
 603
 604                 esas2r_log_dev(ESAS2R_LOG_INFO,
 605                                &(a->pcid->dev),
 606                                "before pci_disable_device() enable_cnt: %d",
 607                                a->pcid->enable_cnt.counter);
 608
 609                 pci_disable_device(a->pcid);
 610                 esas2r_log_dev(ESAS2R_LOG_INFO,
 611                                &(a->pcid->dev),
 612                                "after pci_disable_device() enable_cnt: %d",
 613                                a->pcid->enable_cnt.counter);
 614
 615                 esas2r_log_dev(ESAS2R_LOG_INFO,
 616                                &(a->pcid->dev),
 617                                "pci_set_drv_data(%p, NULL) called",
 618                                a->pcid);
 619
 620                 pci_set_drvdata(a->pcid, NULL);
 621                 esas2r_adapters[i] = NULL;
 622
 623                 if (test_bit(AF2_INIT_DONE, &a->flags2)) {
 624                         clear_bit(AF2_INIT_DONE, &a->flags2);
 625
 626                         set_bit(AF_DEGRADED_MODE, &a->flags);
 627
 628                         esas2r_log_dev(ESAS2R_LOG_INFO,
 629                                        &(a->host->shost_gendev),
 630                                        "scsi_remove_host() called");
 631
 632                         scsi_remove_host(a->host);
 633
 634                         esas2r_log_dev(ESAS2R_LOG_INFO,
 635                                        &(a->host->shost_gendev),
 636                                        "scsi_host_put() called");
 637
 638                         scsi_host_put(a->host);
 639                 }
 640         }
 641 }
 642
 643 int esas2r_suspend(struct pci_dev *pdev, pm_message_t state)
 644 {
 645         struct Scsi_Host *host = pci_get_drvdata(pdev);
 646         u32 device_state;
 647         struct esas2r_adapter *a = (struct esas2r_adapter *)host->hostdata;
 648
 649         esas2r_log_dev(ESAS2R_LOG_INFO, &(pdev->dev), "suspending adapter()");
 650         if (!a)
 651                 return -ENODEV;
 652
 653         esas2r_adapter_power_down(a, 1);
 654         device_state = pci_choose_state(pdev, state);
 655         esas2r_log_dev(ESAS2R_LOG_INFO, &(pdev->dev),
 656                        "pci_save_state() called");
 657         pci_save_state(pdev);
 658         esas2r_log_dev(ESAS2R_LOG_INFO, &(pdev->dev),
 659                        "pci_disable_device() called");
 660         pci_disable_device(pdev);
 661         esas2r_log_dev(ESAS2R_LOG_INFO, &(pdev->dev),
 662                        "pci_set_power_state() called");
 663         pci_set_power_state(pdev, device_state);
 664         esas2r_log_dev(ESAS2R_LOG_INFO, &(pdev->dev), "esas2r_suspend(): 0");
 665         return 0;
 666 }
 667
 668 int esas2r_resume(struct pci_dev *pdev)
 669 {
 670         struct Scsi_Host *host = pci_get_drvdata(pdev);
 671         struct esas2r_adapter *a = (struct esas2r_adapter *)host->hostdata;
 672         int rez;
 673
 674         esas2r_log_dev(ESAS2R_LOG_INFO, &(pdev->dev), "resuming adapter()");
 675         esas2r_log_dev(ESAS2R_LOG_INFO, &(pdev->dev),
 676                        "pci_set_power_state(PCI_D0) "
 677                        "called");
 678         pci_set_power_state(pdev, PCI_D0);
 679         esas2r_log_dev(ESAS2R_LOG_INFO, &(pdev->dev),
 680                        "pci_enable_wake(PCI_D0, 0) "
 681                        "called");
 682         pci_enable_wake(pdev, PCI_D0, 0);
 683         esas2r_log_dev(ESAS2R_LOG_INFO, &(pdev->dev),
 684                        "pci_restore_state() called");
 685         pci_restore_state(pdev);
 686         esas2r_log_dev(ESAS2R_LOG_INFO, &(pdev->dev),
 687                        "pci_enable_device() called");
 688         rez = pci_enable_device(pdev);
 689         pci_set_master(pdev);
 690
 691         if (!a) {
 692                 rez = -ENODEV;
 693                 goto error_exit;
 694         }
 695
 696         if (esas2r_map_regions(a) != 0) {
 697                 esas2r_log(ESAS2R_LOG_CRIT, "could not re-map PCI regions!");
 698                 rez = -ENOMEM;
 699                 goto error_exit;
 700         }
 701
 702         /* Set up interupt mode */
 703         esas2r_setup_interrupts(a, a->intr_mode);
 704
 705         /*
 706          * Disable chip interrupts to prevent spurious interrupts until we
 707          * claim the IRQ.
 708          */
 709         esas2r_disable_chip_interrupts(a);
 710         if (!esas2r_power_up(a, true)) {
 711                 esas2r_debug("yikes, esas2r_power_up failed");
 712                 rez = -ENOMEM;
 713                 goto error_exit;
 714         }
 715
 716         esas2r_claim_interrupts(a);
 717
 718         if (test_bit(AF2_IRQ_CLAIMED, &a->flags2)) {
 719                 /*
 720                  * Now that system interrupt(s) are claimed, we can enable
 721                  * chip interrupts.
 722                  */
 723                 esas2r_enable_chip_interrupts(a);
 724                 esas2r_kickoff_timer(a);
 725         } else {
 726                 esas2r_debug("yikes, unable to claim IRQ");
 727                 esas2r_log(ESAS2R_LOG_CRIT, "could not re-claim IRQ!");
 728                 rez = -ENOMEM;
 729                 goto error_exit;
 730         }
 731
 732 error_exit:
 733         esas2r_log_dev(ESAS2R_LOG_CRIT, &(pdev->dev), "esas2r_resume(): %d",
 734                        rez);
 735         return rez;
 736 }
 737
 738 bool esas2r_set_degraded_mode(struct esas2r_adapter *a, char *error_str)
 739 {
 740         set_bit(AF_DEGRADED_MODE, &a->flags);
 741         esas2r_log(ESAS2R_LOG_CRIT,
 742                    "setting adapter to degraded mode: %s\n", error_str);
 743         return false;
 744 }
 745
 746 u32 esas2r_get_uncached_size(struct esas2r_adapter *a)
 747 {
 748         return sizeof(struct esas2r_sas_nvram)
 749                + ALIGN(ESAS2R_DISC_BUF_LEN, 8)
 750                + ALIGN(sizeof(u32), 8) /* outbound list copy pointer */
 751                + 8
 752                + (num_sg_lists * (u16)sgl_page_size)
 753                + ALIGN((num_requests + num_ae_requests + 1 +
 754                         ESAS2R_LIST_EXTRA) *
 755                        sizeof(struct esas2r_inbound_list_source_entry),
 756                        8)
 757                + ALIGN((num_requests + num_ae_requests + 1 +
 758                         ESAS2R_LIST_EXTRA) *
 759                        sizeof(struct atto_vda_ob_rsp), 8)
 760                + 256; /* VDA request and buffer align */
 761 }
 762
 763 static void esas2r_init_pci_cfg_space(struct esas2r_adapter *a)
 764 {
 765         if (pci_is_pcie(a->pcid)) {
 766                 u16 devcontrol;
 767
 768                 pcie_capability_read_word(a->pcid, PCI_EXP_DEVCTL, &devcontrol);
 769
 770                 if ((devcontrol & PCI_EXP_DEVCTL_READRQ) >
 771                      PCI_EXP_DEVCTL_READRQ_512B) {
 772                         esas2r_log(ESAS2R_LOG_INFO,
 773                                    "max read request size > 512B");
 774
 775                         devcontrol &= ~PCI_EXP_DEVCTL_READRQ;
 776                         devcontrol |= PCI_EXP_DEVCTL_READRQ_512B;
 777                         pcie_capability_write_word(a->pcid, PCI_EXP_DEVCTL,
 778                                                    devcontrol);
 779                 }
 780         }
 781 }
 782
 783 /*
 784  * Determine the organization of the uncached data area and
 785  * finish initializing the adapter structure
 786  */
 787 bool esas2r_init_adapter_struct(struct esas2r_adapter *a,
 788                                 void **uncached_area)
 789 {
 790         u32 i;
 791         u8 *high;
 792         struct esas2r_inbound_list_source_entry *element;
 793         struct esas2r_request *rq;
 794         struct esas2r_mem_desc *sgl;
 795
 796         spin_lock_init(&a->sg_list_lock);
 797         spin_lock_init(&a->mem_lock);
 798         spin_lock_init(&a->queue_lock);
 799
 800         a->targetdb_end = &a->targetdb[ESAS2R_MAX_TARGETS];
 801
 802         if (!alloc_vda_req(a, &a->general_req)) {
 803                 esas2r_hdebug(
 804                         "failed to allocate a VDA request for the general req!");
 805                 return false;
 806         }
 807
 808         /* allocate requests for asynchronous events */
 809         a->first_ae_req =
 810                 kcalloc(num_ae_requests, sizeof(struct esas2r_request),
 811                         GFP_KERNEL);
 812
 813         if (a->first_ae_req == NULL) {
 814                 esas2r_log(ESAS2R_LOG_CRIT,
 815                            "failed to allocate memory for asynchronous events");
 816                 return false;
 817         }
 818
 819         /* allocate the S/G list memory descriptors */
 820         a->sg_list_mds = kcalloc(num_sg_lists, sizeof(struct esas2r_mem_desc),
 821                                  GFP_KERNEL);
 822
 823         if (a->sg_list_mds == NULL) {
 824                 esas2r_log(ESAS2R_LOG_CRIT,
 825                            "failed to allocate memory for s/g list descriptors");
 826                 return false;
 827         }
 828
 829         /* allocate the request table */
 830         a->req_table =
 831                 kcalloc(num_requests + num_ae_requests + 1,
 832                         sizeof(struct esas2r_request *),
 833                         GFP_KERNEL);
 834
 835         if (a->req_table == NULL) {
 836                 esas2r_log(ESAS2R_LOG_CRIT,
 837                            "failed to allocate memory for the request table");
 838                 return false;
 839         }
 840
 841         /* initialize PCI configuration space */
 842         esas2r_init_pci_cfg_space(a);
 843
 844         /*
 845          * the thunder_stream boards all have a serial flash part that has a
 846          * different base address on the AHB bus.
 847          */
 848         if ((a->pcid->subsystem_vendor == ATTO_VENDOR_ID)
 849             && (a->pcid->subsystem_device & ATTO_SSDID_TBT))
 850                 a->flags2 |= AF2_THUNDERBOLT;
 851
 852         if (test_bit(AF2_THUNDERBOLT, &a->flags2))
 853                 a->flags2 |= AF2_SERIAL_FLASH;
 854
 855         if (a->pcid->subsystem_device == ATTO_TLSH_1068)
 856                 a->flags2 |= AF2_THUNDERLINK;
 857
 858         /* Uncached Area */
 859         high = (u8 *)*uncached_area;
 860
 861         /* initialize the scatter/gather table pages */
 862
 863         for (i = 0, sgl = a->sg_list_mds; i < num_sg_lists; i++, sgl++) {
 864                 sgl->size = sgl_page_size;
 865
 866                 list_add_tail(&sgl->next_desc, &a->free_sg_list_head);
 867
 868                 if (!esas2r_initmem_alloc(a, sgl, ESAS2R_SGL_ALIGN)) {
 869                         /* Allow the driver to load if the minimum count met. */
 870                         if (i < NUM_SGL_MIN)
 871                                 return false;
 872                         break;
 873                 }
 874         }
 875
 876         /* compute the size of the lists */
 877         a->list_size = num_requests + ESAS2R_LIST_EXTRA;
 878
 879         /* allocate the inbound list */
 880         a->inbound_list_md.size = a->list_size *
 881                                   sizeof(struct
 882                                          esas2r_inbound_list_source_entry);
 883
 884         if (!esas2r_initmem_alloc(a, &a->inbound_list_md, ESAS2R_LIST_ALIGN)) {
 885                 esas2r_hdebug("failed to allocate IB list");
 886                 return false;
 887         }
 888
 889         /* allocate the outbound list */
 890         a->outbound_list_md.size = a->list_size *
 891                                    sizeof(struct atto_vda_ob_rsp);
 892
 893         if (!esas2r_initmem_alloc(a, &a->outbound_list_md,
 894                                   ESAS2R_LIST_ALIGN)) {
 895                 esas2r_hdebug("failed to allocate IB list");
 896                 return false;
 897         }
 898
 899         /* allocate the NVRAM structure */
 900         a->nvram = (struct esas2r_sas_nvram *)high;
 901         high += sizeof(struct esas2r_sas_nvram);
 902
 903         /* allocate the discovery buffer */
 904         a->disc_buffer = high;
 905         high += ESAS2R_DISC_BUF_LEN;
 906         high = PTR_ALIGN(high, 8);
 907
 908         /* allocate the outbound list copy pointer */
 909         a->outbound_copy = (u32 volatile *)high;
 910         high += sizeof(u32);
 911
 912         if (!test_bit(AF_NVR_VALID, &a->flags))
 913                 esas2r_nvram_set_defaults(a);
 914
 915         /* update the caller's uncached memory area pointer */
 916         *uncached_area = (void *)high;
 917
 918         /* initialize the allocated memory */
 919         if (test_bit(AF_FIRST_INIT, &a->flags)) {
 920                 esas2r_targ_db_initialize(a);
 921
 922                 /* prime parts of the inbound list */
 923                 element =
 924                         (struct esas2r_inbound_list_source_entry *)a->
 925                         inbound_list_md.
 926                         virt_addr;
 927
 928                 for (i = 0; i < a->list_size; i++) {
 929                         element->address = 0;
 930                         element->reserved = 0;
 931                         element->length = cpu_to_le32(HWILSE_INTERFACE_F0
 932                                                       | (sizeof(union
 933                                                                 atto_vda_req)
 934                                                          /
 935                                                          sizeof(u32)));
 936                         element++;
 937                 }
 938
 939                 /* init the AE requests */
 940                 for (rq = a->first_ae_req, i = 0; i < num_ae_requests; rq++,
 941                      i++) {
 942                         INIT_LIST_HEAD(&rq->req_list);
 943                         if (!alloc_vda_req(a, rq)) {
 944                                 esas2r_hdebug(
 945                                         "failed to allocate a VDA request!");
 946                                 return false;
 947                         }
 948
 949                         esas2r_rq_init_request(rq, a);
 950
 951                         /* override the completion function */
 952                         rq->comp_cb = esas2r_ae_complete;
 953                 }
 954         }
 955
 956         return true;
 957 }
 958
 959 /* This code will verify that the chip is operational. */
 960 bool esas2r_check_adapter(struct esas2r_adapter *a)
 961 {
 962         u32 starttime;
 963         u32 doorbell;
 964         u64 ppaddr;
 965         u32 dw;
 966
 967         /*
 968          * if the chip reset detected flag is set, we can bypass a bunch of
 969          * stuff.
 970          */
 971         if (test_bit(AF_CHPRST_DETECTED, &a->flags))
 972                 goto skip_chip_reset;
 973
 974         /*
 975          * BEFORE WE DO ANYTHING, disable the chip interrupts!  the boot driver
 976          * may have left them enabled or we may be recovering from a fault.
 977          */
 978         esas2r_write_register_dword(a, MU_INT_MASK_OUT, ESAS2R_INT_DIS_MASK);
 979         esas2r_flush_register_dword(a, MU_INT_MASK_OUT);
 980
 981         /*
 982          * wait for the firmware to become ready by forcing an interrupt and
 983          * waiting for a response.
 984          */
 985         starttime = jiffies_to_msecs(jiffies);
 986
 987         while (true) {
 988                 esas2r_force_interrupt(a);
 989                 doorbell = esas2r_read_register_dword(a, MU_DOORBELL_OUT);
 990                 if (doorbell == 0xFFFFFFFF) {
 991                         /*
 992                          * Give the firmware up to two seconds to enable
 993                          * register access after a reset.
 994                          */
 995                         if ((jiffies_to_msecs(jiffies) - starttime) > 2000)
 996                                 return esas2r_set_degraded_mode(a,
 997                                                                 "unable to access registers");
 998                 } else if (doorbell & DRBL_FORCE_INT) {
 999                         u32 ver = (doorbell & DRBL_FW_VER_MSK);
1000
1001                         /*
1002                          * This driver supports version 0 and version 1 of
1003                          * the API
1004                          */
1005                         esas2r_write_register_dword(a, MU_DOORBELL_OUT,
1006                                                     doorbell);
1007
1008                         if (ver == DRBL_FW_VER_0) {
1009                                 set_bit(AF_LEGACY_SGE_MODE, &a->flags);
1010
1011                                 a->max_vdareq_size = 128;
1012                                 a->build_sgl = esas2r_build_sg_list_sge;
1013                         } else if (ver == DRBL_FW_VER_1) {
1014                                 clear_bit(AF_LEGACY_SGE_MODE, &a->flags);
1015
1016                                 a->max_vdareq_size = 1024;
1017                                 a->build_sgl = esas2r_build_sg_list_prd;
1018                         } else {
1019                                 return esas2r_set_degraded_mode(a,
1020                                                                 "unknown firmware version");
1021                         }
1022                         break;
1023                 }
1024
1025                 schedule_timeout_interruptible(msecs_to_jiffies(100));
1026
1027                 if ((jiffies_to_msecs(jiffies) - starttime) > 180000) {
1028                         esas2r_hdebug("FW ready TMO");
1029                         esas2r_bugon();
1030
1031                         return esas2r_set_degraded_mode(a,
1032                                                         "firmware start has timed out");
1033                 }
1034         }
1035
1036         /* purge any asynchronous events since we will repost them later */
1037         esas2r_write_register_dword(a, MU_DOORBELL_IN, DRBL_MSG_IFC_DOWN);
1038         starttime = jiffies_to_msecs(jiffies);
1039
1040         while (true) {
1041                 doorbell = esas2r_read_register_dword(a, MU_DOORBELL_OUT);
1042                 if (doorbell & DRBL_MSG_IFC_DOWN) {
1043                         esas2r_write_register_dword(a, MU_DOORBELL_OUT,
1044                                                     doorbell);
1045                         break;
1046                 }
1047
1048                 schedule_timeout_interruptible(msecs_to_jiffies(50));
1049
1050                 if ((jiffies_to_msecs(jiffies) - starttime) > 3000) {
1051                         esas2r_hdebug("timeout waiting for interface down");
1052                         break;
1053                 }
1054         }
1055 skip_chip_reset:
1056         /*
1057          * first things first, before we go changing any of these registers
1058          * disable the communication lists.
1059          */
1060         dw = esas2r_read_register_dword(a, MU_IN_LIST_CONFIG);
1061         dw &= ~MU_ILC_ENABLE;
1062         esas2r_write_register_dword(a, MU_IN_LIST_CONFIG, dw);
1063         dw = esas2r_read_register_dword(a, MU_OUT_LIST_CONFIG);
1064         dw &= ~MU_OLC_ENABLE;
1065         esas2r_write_register_dword(a, MU_OUT_LIST_CONFIG, dw);
1066
1067         /* configure the communication list addresses */
1068         ppaddr = a->inbound_list_md.phys_addr;
1069         esas2r_write_register_dword(a, MU_IN_LIST_ADDR_LO,
1070                                     lower_32_bits(ppaddr));
1071         esas2r_write_register_dword(a, MU_IN_LIST_ADDR_HI,
1072                                     upper_32_bits(ppaddr));
1073         ppaddr = a->outbound_list_md.phys_addr;
1074         esas2r_write_register_dword(a, MU_OUT_LIST_ADDR_LO,
1075                                     lower_32_bits(ppaddr));
1076         esas2r_write_register_dword(a, MU_OUT_LIST_ADDR_HI,
1077                                     upper_32_bits(ppaddr));
1078         ppaddr = a->uncached_phys +
1079                  ((u8 *)a->outbound_copy - a->uncached);
1080         esas2r_write_register_dword(a, MU_OUT_LIST_COPY_PTR_LO,
1081                                     lower_32_bits(ppaddr));
1082         esas2r_write_register_dword(a, MU_OUT_LIST_COPY_PTR_HI,
1083                                     upper_32_bits(ppaddr));
1084
1085         /* reset the read and write pointers */
1086         *a->outbound_copy =
1087                 a->last_write =
1088                         a->last_read = a->list_size - 1;
1089         set_bit(AF_COMM_LIST_TOGGLE, &a->flags);
1090         esas2r_write_register_dword(a, MU_IN_LIST_WRITE, MU_ILW_TOGGLE |
1091                                     a->last_write);
1092         esas2r_write_register_dword(a, MU_OUT_LIST_COPY, MU_OLC_TOGGLE |
1093                                     a->last_write);
1094         esas2r_write_register_dword(a, MU_IN_LIST_READ, MU_ILR_TOGGLE |
1095                                     a->last_write);
1096         esas2r_write_register_dword(a, MU_OUT_LIST_WRITE,
1097                                     MU_OLW_TOGGLE | a->last_write);
1098
1099         /* configure the interface select fields */
1100         dw = esas2r_read_register_dword(a, MU_IN_LIST_IFC_CONFIG);
1101         dw &= ~(MU_ILIC_LIST | MU_ILIC_DEST);
1102         esas2r_write_register_dword(a, MU_IN_LIST_IFC_CONFIG,
1103                                     (dw | MU_ILIC_LIST_F0 | MU_ILIC_DEST_DDR));
1104         dw = esas2r_read_register_dword(a, MU_OUT_LIST_IFC_CONFIG);
1105         dw &= ~(MU_OLIC_LIST | MU_OLIC_SOURCE);
1106         esas2r_write_register_dword(a, MU_OUT_LIST_IFC_CONFIG,
1107                                     (dw | MU_OLIC_LIST_F0 |
1108                                      MU_OLIC_SOURCE_DDR));
1109
1110         /* finish configuring the communication lists */
1111         dw = esas2r_read_register_dword(a, MU_IN_LIST_CONFIG);
1112         dw &= ~(MU_ILC_ENTRY_MASK | MU_ILC_NUMBER_MASK);
1113         dw |= MU_ILC_ENTRY_4_DW | MU_ILC_DYNAMIC_SRC
1114               | (a->list_size << MU_ILC_NUMBER_SHIFT);
1115         esas2r_write_register_dword(a, MU_IN_LIST_CONFIG, dw);
1116         dw = esas2r_read_register_dword(a, MU_OUT_LIST_CONFIG);
1117         dw &= ~(MU_OLC_ENTRY_MASK | MU_OLC_NUMBER_MASK);
1118         dw |= MU_OLC_ENTRY_4_DW | (a->list_size << MU_OLC_NUMBER_SHIFT);
1119         esas2r_write_register_dword(a, MU_OUT_LIST_CONFIG, dw);
1120
1121         /*
1122          * notify the firmware that we're done setting up the communication
1123          * list registers.  wait here until the firmware is done configuring
1124          * its lists.  it will signal that it is done by enabling the lists.
1125          */
1126         esas2r_write_register_dword(a, MU_DOORBELL_IN, DRBL_MSG_IFC_INIT);
1127         starttime = jiffies_to_msecs(jiffies);
1128
1129         while (true) {
1130                 doorbell = esas2r_read_register_dword(a, MU_DOORBELL_OUT);
1131                 if (doorbell & DRBL_MSG_IFC_INIT) {
1132                         esas2r_write_register_dword(a, MU_DOORBELL_OUT,
1133                                                     doorbell);
1134                         break;
1135                 }
1136
1137                 schedule_timeout_interruptible(msecs_to_jiffies(100));
1138
1139                 if ((jiffies_to_msecs(jiffies) - starttime) > 3000) {
1140                         esas2r_hdebug(
1141                                 "timeout waiting for communication list init");
1142                         esas2r_bugon();
1143                         return esas2r_set_degraded_mode(a,
1144                                                         "timeout waiting for communication list init");
1145                 }
1146         }
1147
1148         /*
1149          * flag whether the firmware supports the power down doorbell.  we
1150          * determine this by reading the inbound doorbell enable mask.
1151          */
1152         doorbell = esas2r_read_register_dword(a, MU_DOORBELL_IN_ENB);
1153         if (doorbell & DRBL_POWER_DOWN)
1154                 set_bit(AF2_VDA_POWER_DOWN, &a->flags2);
1155         else
1156                 clear_bit(AF2_VDA_POWER_DOWN, &a->flags2);
1157
1158         /*
1159          * enable assertion of outbound queue and doorbell interrupts in the
1160          * main interrupt cause register.
1161          */
1162         esas2r_write_register_dword(a, MU_OUT_LIST_INT_MASK, MU_OLIS_MASK);
1163         esas2r_write_register_dword(a, MU_DOORBELL_OUT_ENB, DRBL_ENB_MASK);
1164         return true;
1165 }
1166
1167 /* Process the initialization message just completed and format the next one. */
1168 static bool esas2r_format_init_msg(struct esas2r_adapter *a,
1169                                    struct esas2r_request *rq)
1170 {
1171         u32 msg = a->init_msg;
1172         struct atto_vda_cfg_init *ci;
1173
1174         a->init_msg = 0;
1175
1176         switch (msg) {
1177         case ESAS2R_INIT_MSG_START:
1178         case ESAS2R_INIT_MSG_REINIT:
1179         {
1180                 esas2r_hdebug("CFG init");
1181                 esas2r_build_cfg_req(a,
1182                                      rq,
1183                                      VDA_CFG_INIT,
1184                                      0,
1185                                      NULL);
1186                 ci = (struct atto_vda_cfg_init *)&rq->vrq->cfg.data.init;
1187                 ci->sgl_page_size = cpu_to_le32(sgl_page_size);
1188                 /* firmware interface overflows in y2106 */
1189                 ci->epoch_time = cpu_to_le32(ktime_get_real_seconds());
1190                 rq->flags |= RF_FAILURE_OK;
1191                 a->init_msg = ESAS2R_INIT_MSG_INIT;
1192                 break;
1193         }
1194
1195         case ESAS2R_INIT_MSG_INIT:
1196                 if (rq->req_stat == RS_SUCCESS) {
1197                         u32 major;
1198                         u32 minor;
1199                         u16 fw_release;
1200
1201                         a->fw_version = le16_to_cpu(
1202                                 rq->func_rsp.cfg_rsp.vda_version);
1203                         a->fw_build = rq->func_rsp.cfg_rsp.fw_build;
1204                         fw_release = le16_to_cpu(
1205                                 rq->func_rsp.cfg_rsp.fw_release);
1206                         major = LOBYTE(fw_release);
1207                         minor = HIBYTE(fw_release);
1208                         a->fw_version += (major << 16) + (minor << 24);
1209                 } else {
1210                         esas2r_hdebug("FAILED");
1211                 }
1212
1213                 /*
1214                  * the 2.71 and earlier releases of R6xx firmware did not error
1215                  * unsupported config requests correctly.
1216                  */
1217
1218                 if ((test_bit(AF2_THUNDERBOLT, &a->flags2))
1219                     || (be32_to_cpu(a->fw_version) > 0x00524702)) {
1220                         esas2r_hdebug("CFG get init");
1221                         esas2r_build_cfg_req(a,
1222                                              rq,
1223                                              VDA_CFG_GET_INIT2,
1224                                              sizeof(struct atto_vda_cfg_init),
1225                                              NULL);
1226
1227                         rq->vrq->cfg.sg_list_offset = offsetof(
1228                                 struct atto_vda_cfg_req,
1229                                 data.sge);
1230                         rq->vrq->cfg.data.prde.ctl_len =
1231                                 cpu_to_le32(sizeof(struct atto_vda_cfg_init));
1232                         rq->vrq->cfg.data.prde.address = cpu_to_le64(
1233                                 rq->vrq_md->phys_addr +
1234                                 sizeof(union atto_vda_req));
1235                         rq->flags |= RF_FAILURE_OK;
1236                         a->init_msg = ESAS2R_INIT_MSG_GET_INIT;
1237                         break;
1238                 }
1239                 fallthrough;
1240
1241         case ESAS2R_INIT_MSG_GET_INIT:
1242                 if (msg == ESAS2R_INIT_MSG_GET_INIT) {
1243                         ci = (struct atto_vda_cfg_init *)rq->data_buf;
1244                         if (rq->req_stat == RS_SUCCESS) {
1245                                 a->num_targets_backend =
1246                                         le32_to_cpu(ci->num_targets_backend);
1247                                 a->ioctl_tunnel =
1248                                         le32_to_cpu(ci->ioctl_tunnel);
1249                         } else {
1250                                 esas2r_hdebug("FAILED");
1251                         }
1252                 }
1253                 fallthrough;
1254
1255         default:
1256                 rq->req_stat = RS_SUCCESS;
1257                 return false;
1258         }
1259         return true;
1260 }
1261
1262 /*
1263  * Perform initialization messages via the request queue.  Messages are
1264  * performed with interrupts disabled.
1265  */
1266 bool esas2r_init_msgs(struct esas2r_adapter *a)
1267 {
1268         bool success = true;
1269         struct esas2r_request *rq = &a->general_req;
1270
1271         esas2r_rq_init_request(rq, a);
1272         rq->comp_cb = esas2r_dummy_complete;
1273
1274         if (a->init_msg == 0)
1275                 a->init_msg = ESAS2R_INIT_MSG_REINIT;
1276
1277         while (a->init_msg) {
1278                 if (esas2r_format_init_msg(a, rq)) {
1279                         unsigned long flags;
1280                         while (true) {
1281                                 spin_lock_irqsave(&a->queue_lock, flags);
1282                                 esas2r_start_vda_request(a, rq);
1283                                 spin_unlock_irqrestore(&a->queue_lock, flags);
1284                                 esas2r_wait_request(a, rq);
1285                                 if (rq->req_stat != RS_PENDING)
1286                                         break;
1287                         }
1288                 }
1289
1290                 if (rq->req_stat == RS_SUCCESS
1291                     || ((rq->flags & RF_FAILURE_OK)
1292                         && rq->req_stat != RS_TIMEOUT))
1293                         continue;
1294
1295                 esas2r_log(ESAS2R_LOG_CRIT, "init message %x failed (%x, %x)",
1296                            a->init_msg, rq->req_stat, rq->flags);
1297                 a->init_msg = ESAS2R_INIT_MSG_START;
1298                 success = false;
1299                 break;
1300         }
1301
1302         esas2r_rq_destroy_request(rq, a);
1303         return success;
1304 }
1305
1306 /* Initialize the adapter chip */
1307 bool esas2r_init_adapter_hw(struct esas2r_adapter *a, bool init_poll)
1308 {
1309         bool rslt = false;
1310         struct esas2r_request *rq;
1311         u32 i;
1312
1313         if (test_bit(AF_DEGRADED_MODE, &a->flags))
1314                 goto exit;
1315
1316         if (!test_bit(AF_NVR_VALID, &a->flags)) {
1317                 if (!esas2r_nvram_read_direct(a))
1318                         esas2r_log(ESAS2R_LOG_WARN,
1319                                    "invalid/missing NVRAM parameters");
1320         }
1321
1322         if (!esas2r_init_msgs(a)) {
1323                 esas2r_set_degraded_mode(a, "init messages failed");
1324                 goto exit;
1325         }
1326
1327         /* The firmware is ready. */
1328         clear_bit(AF_DEGRADED_MODE, &a->flags);
1329         clear_bit(AF_CHPRST_PENDING, &a->flags);
1330
1331         /* Post all the async event requests */
1332         for (i = 0, rq = a->first_ae_req; i < num_ae_requests; i++, rq++)
1333                 esas2r_start_ae_request(a, rq);
1334
1335         if (!a->flash_rev[0])
1336                 esas2r_read_flash_rev(a);
1337
1338         if (!a->image_type[0])
1339                 esas2r_read_image_type(a);
1340
1341         if (a->fw_version == 0)
1342                 a->fw_rev[0] = 0;
1343         else
1344                 sprintf(a->fw_rev, "%1d.%02d",
1345                         (int)LOBYTE(HIWORD(a->fw_version)),
1346                         (int)HIBYTE(HIWORD(a->fw_version)));
1347
1348         esas2r_hdebug("firmware revision: %s", a->fw_rev);
1349
1350         if (test_bit(AF_CHPRST_DETECTED, &a->flags)
1351             && (test_bit(AF_FIRST_INIT, &a->flags))) {
1352                 esas2r_enable_chip_interrupts(a);
1353                 return true;
1354         }
1355
1356         /* initialize discovery */
1357         esas2r_disc_initialize(a);
1358
1359         /*
1360          * wait for the device wait time to expire here if requested.  this is
1361          * usually requested during initial driver load and possibly when
1362          * resuming from a low power state.  deferred device waiting will use
1363          * interrupts.  chip reset recovery always defers device waiting to
1364          * avoid being in a TASKLET too long.
1365          */
1366         if (init_poll) {
1367                 u32 currtime = a->disc_start_time;
1368                 u32 nexttick = 100;
1369                 u32 deltatime;
1370
1371                 /*
1372                  * Block Tasklets from getting scheduled and indicate this is
1373                  * polled discovery.
1374                  */
1375                 set_bit(AF_TASKLET_SCHEDULED, &a->flags);
1376                 set_bit(AF_DISC_POLLED, &a->flags);
1377
1378                 /*
1379                  * Temporarily bring the disable count to zero to enable
1380                  * deferred processing.  Note that the count is already zero
1381                  * after the first initialization.
1382                  */
1383                 if (test_bit(AF_FIRST_INIT, &a->flags))
1384                         atomic_dec(&a->disable_cnt);
1385
1386                 while (test_bit(AF_DISC_PENDING, &a->flags)) {
1387                         schedule_timeout_interruptible(msecs_to_jiffies(100));
1388
1389                         /*
1390                          * Determine the need for a timer tick based on the
1391                          * delta time between this and the last iteration of
1392                          * this loop.  We don't use the absolute time because
1393                          * then we would have to worry about when nexttick
1394                          * wraps and currtime hasn't yet.
1395                          */
1396                         deltatime = jiffies_to_msecs(jiffies) - currtime;
1397                         currtime += deltatime;
1398
1399                         /*
1400                          * Process any waiting discovery as long as the chip is
1401                          * up.  If a chip reset happens during initial polling,
1402                          * we have to make sure the timer tick processes the
1403                          * doorbell indicating the firmware is ready.
1404                          */
1405                         if (!test_bit(AF_CHPRST_PENDING, &a->flags))
1406                                 esas2r_disc_check_for_work(a);
1407
1408                         /* Simulate a timer tick. */
1409                         if (nexttick <= deltatime) {
1410
1411                                 /* Time for a timer tick */
1412                                 nexttick += 100;
1413                                 esas2r_timer_tick(a);
1414                         }
1415
1416                         if (nexttick > deltatime)
1417                                 nexttick -= deltatime;
1418
1419                         /* Do any deferred processing */
1420                         if (esas2r_is_tasklet_pending(a))
1421                                 esas2r_do_tasklet_tasks(a);
1422
1423                 }
1424
1425                 if (test_bit(AF_FIRST_INIT, &a->flags))
1426                         atomic_inc(&a->disable_cnt);
1427
1428                 clear_bit(AF_DISC_POLLED, &a->flags);
1429                 clear_bit(AF_TASKLET_SCHEDULED, &a->flags);
1430         }
1431
1432
1433         esas2r_targ_db_report_changes(a);
1434
1435         /*
1436          * For cases where (a) the initialization messages processing may
1437          * handle an interrupt for a port event and a discovery is waiting, but
1438          * we are not waiting for devices, or (b) the device wait time has been
1439          * exhausted but there is still discovery pending, start any leftover
1440          * discovery in interrupt driven mode.
1441          */
1442         esas2r_disc_start_waiting(a);
1443
1444         /* Enable chip interrupts */
1445         a->int_mask = ESAS2R_INT_STS_MASK;
1446         esas2r_enable_chip_interrupts(a);
1447         esas2r_enable_heartbeat(a);
1448         rslt = true;
1449
1450 exit:
1451         /*
1452          * Regardless of whether initialization was successful, certain things
1453          * need to get done before we exit.
1454          */
1455
1456         if (test_bit(AF_CHPRST_DETECTED, &a->flags) &&
1457             test_bit(AF_FIRST_INIT, &a->flags)) {
1458                 /*
1459                  * Reinitialization was performed during the first
1460                  * initialization.  Only clear the chip reset flag so the
1461                  * original device polling is not cancelled.
1462                  */
1463                 if (!rslt)
1464                         clear_bit(AF_CHPRST_PENDING, &a->flags);
1465         } else {
1466                 /* First initialization or a subsequent re-init is complete. */
1467                 if (!rslt) {
1468                         clear_bit(AF_CHPRST_PENDING, &a->flags);
1469                         clear_bit(AF_DISC_PENDING, &a->flags);
1470                 }
1471
1472
1473                 /* Enable deferred processing after the first initialization. */
1474                 if (test_bit(AF_FIRST_INIT, &a->flags)) {
1475                         clear_bit(AF_FIRST_INIT, &a->flags);
1476
1477                         if (atomic_dec_return(&a->disable_cnt) == 0)
1478                                 esas2r_do_deferred_processes(a);
1479                 }
1480         }
1481
1482         return rslt;
1483 }
1484
1485 void esas2r_reset_adapter(struct esas2r_adapter *a)
1486 {
1487         set_bit(AF_OS_RESET, &a->flags);
1488         esas2r_local_reset_adapter(a);
1489         esas2r_schedule_tasklet(a);
1490 }
1491
1492 void esas2r_reset_chip(struct esas2r_adapter *a)
1493 {
1494         if (!esas2r_is_adapter_present(a))
1495                 return;
1496
1497         /*
1498          * Before we reset the chip, save off the VDA core dump.  The VDA core
1499          * dump is located in the upper 512KB of the onchip SRAM.  Make sure
1500          * to not overwrite a previous crash that was saved.
1501          */
1502         if (test_bit(AF2_COREDUMP_AVAIL, &a->flags2) &&
1503             !test_bit(AF2_COREDUMP_SAVED, &a->flags2)) {
1504                 esas2r_read_mem_block(a,
1505                                       a->fw_coredump_buff,
1506                                       MW_DATA_ADDR_SRAM + 0x80000,
1507                                       ESAS2R_FWCOREDUMP_SZ);
1508
1509                 set_bit(AF2_COREDUMP_SAVED, &a->flags2);
1510         }
1511
1512         clear_bit(AF2_COREDUMP_AVAIL, &a->flags2);
1513
1514         /* Reset the chip */
1515         if (a->pcid->revision == MVR_FREY_B2)
1516                 esas2r_write_register_dword(a, MU_CTL_STATUS_IN_B2,
1517                                             MU_CTL_IN_FULL_RST2);
1518         else
1519                 esas2r_write_register_dword(a, MU_CTL_STATUS_IN,
1520                                             MU_CTL_IN_FULL_RST);
1521
1522
1523         /* Stall a little while to let the reset condition clear */
1524         mdelay(10);
1525 }
1526
1527 static void esas2r_power_down_notify_firmware(struct esas2r_adapter *a)
1528 {
1529         u32 starttime;
1530         u32 doorbell;
1531
1532         esas2r_write_register_dword(a, MU_DOORBELL_IN, DRBL_POWER_DOWN);
1533         starttime = jiffies_to_msecs(jiffies);
1534
1535         while (true) {
1536                 doorbell = esas2r_read_register_dword(a, MU_DOORBELL_OUT);
1537                 if (doorbell & DRBL_POWER_DOWN) {
1538                         esas2r_write_register_dword(a, MU_DOORBELL_OUT,
1539                                                     doorbell);
1540                         break;
1541                 }
1542
1543                 schedule_timeout_interruptible(msecs_to_jiffies(100));
1544
1545                 if ((jiffies_to_msecs(jiffies) - starttime) > 30000) {
1546                         esas2r_hdebug("Timeout waiting for power down");
1547                         break;
1548                 }
1549         }
1550 }
1551
1552 /*
1553  * Perform power management processing including managing device states, adapter
1554  * states, interrupts, and I/O.
1555  */
1556 void esas2r_power_down(struct esas2r_adapter *a)
1557 {
1558         set_bit(AF_POWER_MGT, &a->flags);
1559         set_bit(AF_POWER_DOWN, &a->flags);
1560
1561         if (!test_bit(AF_DEGRADED_MODE, &a->flags)) {
1562                 u32 starttime;
1563                 u32 doorbell;
1564
1565                 /*
1566                  * We are currently running OK and will be reinitializing later.
1567                  * increment the disable count to coordinate with
1568                  * esas2r_init_adapter.  We don't have to do this in degraded
1569                  * mode since we never enabled interrupts in the first place.
1570                  */
1571                 esas2r_disable_chip_interrupts(a);
1572                 esas2r_disable_heartbeat(a);
1573
1574                 /* wait for any VDA activity to clear before continuing */
1575                 esas2r_write_register_dword(a, MU_DOORBELL_IN,
1576                                             DRBL_MSG_IFC_DOWN);
1577                 starttime = jiffies_to_msecs(jiffies);
1578
1579                 while (true) {
1580                         doorbell =
1581                                 esas2r_read_register_dword(a, MU_DOORBELL_OUT);
1582                         if (doorbell & DRBL_MSG_IFC_DOWN) {
1583                                 esas2r_write_register_dword(a, MU_DOORBELL_OUT,
1584                                                             doorbell);
1585                                 break;
1586                         }
1587
1588                         schedule_timeout_interruptible(msecs_to_jiffies(100));
1589
1590                         if ((jiffies_to_msecs(jiffies) - starttime) > 3000) {
1591                                 esas2r_hdebug(
1592                                         "timeout waiting for interface down");
1593                                 break;
1594                         }
1595                 }
1596
1597                 /*
1598                  * For versions of firmware that support it tell them the driver
1599                  * is powering down.
1600                  */
1601                 if (test_bit(AF2_VDA_POWER_DOWN, &a->flags2))
1602                         esas2r_power_down_notify_firmware(a);
1603         }
1604
1605         /* Suspend I/O processing. */
1606         set_bit(AF_OS_RESET, &a->flags);
1607         set_bit(AF_DISC_PENDING, &a->flags);
1608         set_bit(AF_CHPRST_PENDING, &a->flags);
1609
1610         esas2r_process_adapter_reset(a);
1611
1612         /* Remove devices now that I/O is cleaned up. */
1613         a->prev_dev_cnt = esas2r_targ_db_get_tgt_cnt(a);
1614         esas2r_targ_db_remove_all(a, false);
1615 }
1616
1617 /*
1618  * Perform power management processing including managing device states, adapter
1619  * states, interrupts, and I/O.
1620  */
1621 bool esas2r_power_up(struct esas2r_adapter *a, bool init_poll)
1622 {
1623         bool ret;
1624
1625         clear_bit(AF_POWER_DOWN, &a->flags);
1626         esas2r_init_pci_cfg_space(a);
1627         set_bit(AF_FIRST_INIT, &a->flags);
1628         atomic_inc(&a->disable_cnt);
1629
1630         /* reinitialize the adapter */
1631         ret = esas2r_check_adapter(a);
1632         if (!esas2r_init_adapter_hw(a, init_poll))
1633                 ret = false;
1634
1635         /* send the reset asynchronous event */
1636         esas2r_send_reset_ae(a, true);
1637
1638         /* clear this flag after initialization. */
1639         clear_bit(AF_POWER_MGT, &a->flags);
1640         return ret;
1641 }
1642
1643 bool esas2r_is_adapter_present(struct esas2r_adapter *a)
1644 {
1645         if (test_bit(AF_NOT_PRESENT, &a->flags))
1646                 return false;
1647
1648         if (esas2r_read_register_dword(a, MU_DOORBELL_OUT) == 0xFFFFFFFF) {
1649                 set_bit(AF_NOT_PRESENT, &a->flags);
1650
1651                 return false;
1652         }
1653         return true;
1654 }
1655
1656 const char *esas2r_get_model_name(struct esas2r_adapter *a)
1657 {
1658         switch (a->pcid->subsystem_device) {
1659         case ATTO_ESAS_R680:
1660                 return "ATTO ExpressSAS R680";
1661
1662         case ATTO_ESAS_R608:
1663                 return "ATTO ExpressSAS R608";
1664
1665         case ATTO_ESAS_R60F:
1666                 return "ATTO ExpressSAS R60F";
1667
1668         case ATTO_ESAS_R6F0:
1669                 return "ATTO ExpressSAS R6F0";
1670
1671         case ATTO_ESAS_R644:
1672                 return "ATTO ExpressSAS R644";
1673
1674         case ATTO_ESAS_R648:
1675                 return "ATTO ExpressSAS R648";
1676
1677         case ATTO_TSSC_3808:
1678                 return "ATTO ThunderStream SC 3808D";
1679
1680         case ATTO_TSSC_3808E:
1681                 return "ATTO ThunderStream SC 3808E";
1682
1683         case ATTO_TLSH_1068:
1684                 return "ATTO ThunderLink SH 1068";
1685         }
1686
1687         return "ATTO SAS Controller";
1688 }
1689
1690 const char *esas2r_get_model_name_short(struct esas2r_adapter *a)
1691 {
1692         switch (a->pcid->subsystem_device) {
1693         case ATTO_ESAS_R680:
1694                 return "R680";
1695
1696         case ATTO_ESAS_R608:
1697                 return "R608";
1698
1699         case ATTO_ESAS_R60F:
1700                 return "R60F";
1701
1702         case ATTO_ESAS_R6F0:
1703                 return "R6F0";
1704
1705         case ATTO_ESAS_R644:
1706                 return "R644";
1707
1708         case ATTO_ESAS_R648:
1709                 return "R648";
1710
1711         case ATTO_TSSC_3808:
1712                 return "SC 3808D";
1713
1714         case ATTO_TSSC_3808E:
1715                 return "SC 3808E";
1716
1717         case ATTO_TLSH_1068:
1718                 return "SH 1068";
1719         }
1720
1721         return "unknown";
1722 }