drivers/scsi/arcmsr/arcmsr_hba.c

   1 /*
   2 *******************************************************************************
   3 **        O.S   : Linux
   4 **   FILE NAME  : arcmsr_hba.c
   5 **        BY    : Erich Chen
   6 **   Description: SCSI RAID Device Driver for
   7 **                ARECA RAID Host adapter
   8 *******************************************************************************
   9 ** Copyright (C) 2002 - 2005, Areca Technology Corporation All rights reserved
  10 **
  11 **     Web site: www.areca.com.tw
  12 **       E-mail: support@areca.com.tw
  13 **
  14 ** This program is free software; you can redistribute it and/or modify
  15 ** it under the terms of the GNU General Public License version 2 as
  16 ** published by the Free Software Foundation.
  17 ** This program is distributed in the hope that it will be useful,
  18 ** but WITHOUT ANY WARRANTY; without even the implied warranty of
  19 ** MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
  20 ** GNU General Public License for more details.
  21 *******************************************************************************
  22 ** Redistribution and use in source and binary forms, with or without
  23 ** modification, are permitted provided that the following conditions
  24 ** are met:
  25 ** 1. Redistributions of source code must retain the above copyright
  26 **    notice, this list of conditions and the following disclaimer.
  27 ** 2. Redistributions in binary form must reproduce the above copyright
  28 **    notice, this list of conditions and the following disclaimer in the
  29 **    documentation and/or other materials provided with the distribution.
  30 ** 3. The name of the author may not be used to endorse or promote products
  31 **    derived from this software without specific prior written permission.
  32 **
  33 ** THIS SOFTWARE IS PROVIDED BY THE AUTHOR ``AS IS'' AND ANY EXPRESS OR
  34 ** IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES
  35 ** OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE DISCLAIMED.
  36 ** IN NO EVENT SHALL THE AUTHOR BE LIABLE FOR ANY DIRECT, INDIRECT,
  37 ** INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES(INCLUDING,BUT
  38 ** NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE,
  39 ** DATA, OR PROFITS; OR BUSINESS INTERRUPTION)HOWEVER CAUSED AND ON ANY
  40 ** THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
  41 ** (INCLUDING NEGLIGENCE OR OTHERWISE)ARISING IN ANY WAY OUT OF THE USE OF
  42 ** THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
  43 *******************************************************************************
  44 ** For history of changes, see Documentation/scsi/ChangeLog.arcmsr
  45 **     Firmware Specification, see Documentation/scsi/arcmsr_spec.txt
  46 *******************************************************************************
  47 */
  48 #include <linux/module.h>
  49 #include <linux/reboot.h>
  50 #include <linux/spinlock.h>
  51 #include <linux/pci_ids.h>
  52 #include <linux/interrupt.h>
  53 #include <linux/moduleparam.h>
  54 #include <linux/errno.h>
  55 #include <linux/types.h>
  56 #include <linux/delay.h>
  57 #include <linux/dma-mapping.h>
  58 #include <linux/timer.h>
  59 #include <linux/pci.h>
  60 #include <linux/aer.h>
  61 #include <asm/dma.h>
  62 #include <asm/io.h>
  63 #include <asm/system.h>
  64 #include <asm/uaccess.h>
  65 #include <scsi/scsi_host.h>
  66 #include <scsi/scsi.h>
  67 #include <scsi/scsi_cmnd.h>
  68 #include <scsi/scsi_tcq.h>
  69 #include <scsi/scsi_device.h>
  70 #include <scsi/scsi_transport.h>
  71 #include <scsi/scsicam.h>
  72 #include "arcmsr.h"
  73
  74 MODULE_AUTHOR("Erich Chen <support@areca.com.tw>");
  75 MODULE_DESCRIPTION("ARECA (ARC11xx/12xx/13xx/16xx) SATA/SAS RAID HOST Adapter");
  76 MODULE_LICENSE("Dual BSD/GPL");
  77 MODULE_VERSION(ARCMSR_DRIVER_VERSION);
  78
  79 static int arcmsr_iop_message_xfer(struct AdapterControlBlock *acb,
  80                                         struct scsi_cmnd *cmd);
  81 static int arcmsr_iop_confirm(struct AdapterControlBlock *acb);
  82 static int arcmsr_abort(struct scsi_cmnd *);
  83 static int arcmsr_bus_reset(struct scsi_cmnd *);
  84 static int arcmsr_bios_param(struct scsi_device *sdev,
  85                 struct block_device *bdev, sector_t capacity, int *info);
  86 static int arcmsr_queue_command(struct scsi_cmnd *cmd,
  87                                         void (*done) (struct scsi_cmnd *));
  88 static int arcmsr_probe(struct pci_dev *pdev,
  89                                 const struct pci_device_id *id);
  90 static void arcmsr_remove(struct pci_dev *pdev);
  91 static void arcmsr_shutdown(struct pci_dev *pdev);
  92 static void arcmsr_iop_init(struct AdapterControlBlock *acb);
  93 static void arcmsr_free_ccb_pool(struct AdapterControlBlock *acb);
  94 static u32 arcmsr_disable_outbound_ints(struct AdapterControlBlock *acb);
  95 static void arcmsr_stop_adapter_bgrb(struct AdapterControlBlock *acb);
  96 static void arcmsr_flush_hba_cache(struct AdapterControlBlock *acb);
  97 static void arcmsr_flush_hbb_cache(struct AdapterControlBlock *acb);
  98 static const char *arcmsr_info(struct Scsi_Host *);
  99 static irqreturn_t arcmsr_interrupt(struct AdapterControlBlock *acb);
 100 static int arcmsr_adjust_disk_queue_depth(struct scsi_device *sdev,
 101                                                                 int queue_depth)
 102 {
 103         if (queue_depth > ARCMSR_MAX_CMD_PERLUN)
 104                 queue_depth = ARCMSR_MAX_CMD_PERLUN;
 105         scsi_adjust_queue_depth(sdev, MSG_ORDERED_TAG, queue_depth);
 106         return queue_depth;
 107 }
 108
 109 static struct scsi_host_template arcmsr_scsi_host_template = {
 110         .module                 = THIS_MODULE,
 111         .name                   = "ARCMSR ARECA SATA/SAS RAID HOST Adapter"
 112                                                         ARCMSR_DRIVER_VERSION,
 113         .info                   = arcmsr_info,
 114         .queuecommand           = arcmsr_queue_command,
 115         .eh_abort_handler       = arcmsr_abort,
 116         .eh_bus_reset_handler   = arcmsr_bus_reset,
 117         .bios_param             = arcmsr_bios_param,
 118         .change_queue_depth     = arcmsr_adjust_disk_queue_depth,
 119         .can_queue              = ARCMSR_MAX_OUTSTANDING_CMD,
 120         .this_id                = ARCMSR_SCSI_INITIATOR_ID,
 121         .sg_tablesize           = ARCMSR_MAX_SG_ENTRIES,
 122         .max_sectors            = ARCMSR_MAX_XFER_SECTORS,
 123         .cmd_per_lun            = ARCMSR_MAX_CMD_PERLUN,
 124         .use_clustering         = ENABLE_CLUSTERING,
 125         .use_sg_chaining        = ENABLE_SG_CHAINING,
 126         .shost_attrs            = arcmsr_host_attrs,
 127 };
 128 #ifdef CONFIG_SCSI_ARCMSR_AER
 129 static pci_ers_result_t arcmsr_pci_slot_reset(struct pci_dev *pdev);
 130 static pci_ers_result_t arcmsr_pci_error_detected(struct pci_dev *pdev,
 131                                                 pci_channel_state_t state);
 132
 133 static struct pci_error_handlers arcmsr_pci_error_handlers = {
 134         .error_detected         = arcmsr_pci_error_detected,
 135         .slot_reset             = arcmsr_pci_slot_reset,
 136 };
 137 #endif
 138 static struct pci_device_id arcmsr_device_id_table[] = {
 139         {PCI_DEVICE(PCI_VENDOR_ID_ARECA, PCI_DEVICE_ID_ARECA_1110)},
 140         {PCI_DEVICE(PCI_VENDOR_ID_ARECA, PCI_DEVICE_ID_ARECA_1120)},
 141         {PCI_DEVICE(PCI_VENDOR_ID_ARECA, PCI_DEVICE_ID_ARECA_1130)},
 142         {PCI_DEVICE(PCI_VENDOR_ID_ARECA, PCI_DEVICE_ID_ARECA_1160)},
 143         {PCI_DEVICE(PCI_VENDOR_ID_ARECA, PCI_DEVICE_ID_ARECA_1170)},
 144         {PCI_DEVICE(PCI_VENDOR_ID_ARECA, PCI_DEVICE_ID_ARECA_1200)},
 145         {PCI_DEVICE(PCI_VENDOR_ID_ARECA, PCI_DEVICE_ID_ARECA_1201)},
 146         {PCI_DEVICE(PCI_VENDOR_ID_ARECA, PCI_DEVICE_ID_ARECA_1202)},
 147         {PCI_DEVICE(PCI_VENDOR_ID_ARECA, PCI_DEVICE_ID_ARECA_1210)},
 148         {PCI_DEVICE(PCI_VENDOR_ID_ARECA, PCI_DEVICE_ID_ARECA_1220)},
 149         {PCI_DEVICE(PCI_VENDOR_ID_ARECA, PCI_DEVICE_ID_ARECA_1230)},
 150         {PCI_DEVICE(PCI_VENDOR_ID_ARECA, PCI_DEVICE_ID_ARECA_1260)},
 151         {PCI_DEVICE(PCI_VENDOR_ID_ARECA, PCI_DEVICE_ID_ARECA_1270)},
 152         {PCI_DEVICE(PCI_VENDOR_ID_ARECA, PCI_DEVICE_ID_ARECA_1280)},
 153         {PCI_DEVICE(PCI_VENDOR_ID_ARECA, PCI_DEVICE_ID_ARECA_1380)},
 154         {PCI_DEVICE(PCI_VENDOR_ID_ARECA, PCI_DEVICE_ID_ARECA_1381)},
 155         {PCI_DEVICE(PCI_VENDOR_ID_ARECA, PCI_DEVICE_ID_ARECA_1680)},
 156         {PCI_DEVICE(PCI_VENDOR_ID_ARECA, PCI_DEVICE_ID_ARECA_1681)},
 157         {0, 0}, /* Terminating entry */
 158 };
 159 MODULE_DEVICE_TABLE(pci, arcmsr_device_id_table);
 160 static struct pci_driver arcmsr_pci_driver = {
 161         .name                   = "arcmsr",
 162         .id_table               = arcmsr_device_id_table,
 163         .probe                  = arcmsr_probe,
 164         .remove                 = arcmsr_remove,
 165         .shutdown               = arcmsr_shutdown,
 166         #ifdef CONFIG_SCSI_ARCMSR_AER
 167         .err_handler            = &arcmsr_pci_error_handlers,
 168         #endif
 169 };
 170
 171 static irqreturn_t arcmsr_do_interrupt(int irq, void *dev_id)
 172 {
 173         irqreturn_t handle_state;
 174         struct AdapterControlBlock *acb = dev_id;
 175
 176         spin_lock(acb->host->host_lock);
 177         handle_state = arcmsr_interrupt(acb);
 178         spin_unlock(acb->host->host_lock);
 179
 180         return handle_state;
 181 }
 182
 183 static int arcmsr_bios_param(struct scsi_device *sdev,
 184                 struct block_device *bdev, sector_t capacity, int *geom)
 185 {
 186         int ret, heads, sectors, cylinders, total_capacity;
 187         unsigned char *buffer;/* return copy of block device's partition table */
 188
 189         buffer = scsi_bios_ptable(bdev);
 190         if (buffer) {
 191                 ret = scsi_partsize(buffer, capacity, &geom[2], &geom[0], &geom[1]);
 192                 kfree(buffer);
 193                 if (ret != -1)
 194                         return ret;
 195         }
 196         total_capacity = capacity;
 197         heads = 64;
 198         sectors = 32;
 199         cylinders = total_capacity / (heads * sectors);
 200         if (cylinders > 1024) {
 201                 heads = 255;
 202                 sectors = 63;
 203                 cylinders = total_capacity / (heads * sectors);
 204         }
 205         geom[0] = heads;
 206         geom[1] = sectors;
 207         geom[2] = cylinders;
 208         return 0;
 209 }
 210
 211 static void arcmsr_define_adapter_type(struct AdapterControlBlock *acb)
 212 {
 213         struct pci_dev *pdev = acb->pdev;
 214         u16 dev_id;
 215         pci_read_config_word(pdev, PCI_DEVICE_ID, &dev_id);
 216         switch (dev_id) {
 217         case 0x1201 : {
 218                 acb->adapter_type = ACB_ADAPTER_TYPE_B;
 219                 }
 220                 break;
 221
 222         default : acb->adapter_type = ACB_ADAPTER_TYPE_A;
 223         }
 224 }
 225
 226 static int arcmsr_alloc_ccb_pool(struct AdapterControlBlock *acb)
 227 {
 228
 229         switch (acb->adapter_type) {
 230
 231         case ACB_ADAPTER_TYPE_A: {
 232                 struct pci_dev *pdev = acb->pdev;
 233                 void *dma_coherent;
 234                 dma_addr_t dma_coherent_handle, dma_addr;
 235                 struct CommandControlBlock *ccb_tmp;
 236                 uint32_t intmask_org;
 237                 int i, j;
 238
 239                 acb->pmuA = ioremap(pci_resource_start(pdev, 0), pci_resource_len(pdev, 0));
 240                 if (!acb->pmuA) {
 241                         printk(KERN_NOTICE "arcmsr%d: memory mapping region fail \n",
 242                                                         acb->host->host_no);
 243                 }
 244
 245                 dma_coherent = dma_alloc_coherent(&pdev->dev,
 246                         ARCMSR_MAX_FREECCB_NUM *
 247                         sizeof (struct CommandControlBlock) + 0x20,
 248                         &dma_coherent_handle, GFP_KERNEL);
 249                 if (!dma_coherent)
 250                         return -ENOMEM;
 251
 252                 acb->dma_coherent = dma_coherent;
 253                 acb->dma_coherent_handle = dma_coherent_handle;
 254
 255                 if (((unsigned long)dma_coherent & 0x1F)) {
 256                         dma_coherent = dma_coherent +
 257                                 (0x20 - ((unsigned long)dma_coherent & 0x1F));
 258                         dma_coherent_handle = dma_coherent_handle +
 259                                 (0x20 - ((unsigned long)dma_coherent_handle & 0x1F));
 260                 }
 261
 262                 dma_addr = dma_coherent_handle;
 263                 ccb_tmp = (struct CommandControlBlock *)dma_coherent;
 264                 for (i = 0; i < ARCMSR_MAX_FREECCB_NUM; i++) {
 265                         ccb_tmp->cdb_shifted_phyaddr = dma_addr >> 5;
 266                         ccb_tmp->acb = acb;
 267                         acb->pccb_pool[i] = ccb_tmp;
 268                         list_add_tail(&ccb_tmp->list, &acb->ccb_free_list);
 269                         dma_addr = dma_addr + sizeof(struct CommandControlBlock);
 270                         ccb_tmp++;
 271                 }
 272
 273                 acb->vir2phy_offset = (unsigned long)ccb_tmp -(unsigned long)dma_addr;
 274                 for (i = 0; i < ARCMSR_MAX_TARGETID; i++)
 275                         for (j = 0; j < ARCMSR_MAX_TARGETLUN; j++)
 276                                 acb->devstate[i][j] = ARECA_RAID_GONE;
 277
 278                 /*
 279                 ** here we need to tell iop 331 our ccb_tmp.HighPart
 280                 ** if ccb_tmp.HighPart is not zero
 281                 */
 282                 intmask_org = arcmsr_disable_outbound_ints(acb);
 283                 }
 284                 break;
 285
 286         case ACB_ADAPTER_TYPE_B: {
 287
 288                 struct pci_dev *pdev = acb->pdev;
 289                 struct MessageUnit_B *reg;
 290                 void __iomem *mem_base0, *mem_base1;
 291                 void *dma_coherent;
 292                 dma_addr_t dma_coherent_handle, dma_addr;
 293                 uint32_t intmask_org;
 294                 struct CommandControlBlock *ccb_tmp;
 295                 int i, j;
 296
 297                 dma_coherent = dma_alloc_coherent(&pdev->dev,
 298                         ((ARCMSR_MAX_FREECCB_NUM *
 299                         sizeof(struct CommandControlBlock) + 0x20) +
 300                         sizeof(struct MessageUnit_B)),
 301                         &dma_coherent_handle, GFP_KERNEL);
 302                 if (!dma_coherent)
 303                         return -ENOMEM;
 304
 305                 acb->dma_coherent = dma_coherent;
 306                 acb->dma_coherent_handle = dma_coherent_handle;
 307
 308                 if (((unsigned long)dma_coherent & 0x1F)) {
 309                         dma_coherent = dma_coherent +
 310                                 (0x20 - ((unsigned long)dma_coherent & 0x1F));
 311                         dma_coherent_handle = dma_coherent_handle +
 312                                 (0x20 - ((unsigned long)dma_coherent_handle & 0x1F));
 313                 }
 314
 315                 reg = (struct MessageUnit_B *)(dma_coherent +
 316                 ARCMSR_MAX_FREECCB_NUM * sizeof(struct CommandControlBlock));
 317
 318                 dma_addr = dma_coherent_handle;
 319                 ccb_tmp = (struct CommandControlBlock *)dma_coherent;
 320                 for (i = 0; i < ARCMSR_MAX_FREECCB_NUM; i++) {
 321                         ccb_tmp->cdb_shifted_phyaddr = dma_addr >> 5;
 322                         ccb_tmp->acb = acb;
 323                         acb->pccb_pool[i] = ccb_tmp;
 324                         list_add_tail(&ccb_tmp->list, &acb->ccb_free_list);
 325                         dma_addr = dma_addr + sizeof(struct CommandControlBlock);
 326                         ccb_tmp++;
 327                 }
 328
 329                 reg = (struct MessageUnit_B *)(dma_coherent +
 330                 ARCMSR_MAX_FREECCB_NUM * sizeof(struct CommandControlBlock));
 331                 acb->pmuB = reg;
 332                 mem_base0 = ioremap(pci_resource_start(pdev, 0),
 333                                         pci_resource_len(pdev, 0));
 334                 mem_base1 = ioremap(pci_resource_start(pdev, 2),
 335                                         pci_resource_len(pdev, 2));
 336                 reg->drv2iop_doorbell_reg = mem_base0 + ARCMSR_DRV2IOP_DOORBELL;
 337                 reg->drv2iop_doorbell_mask_reg = mem_base0 +
 338                                                 ARCMSR_DRV2IOP_DOORBELL_MASK;
 339                 reg->iop2drv_doorbell_reg = mem_base0 + ARCMSR_IOP2DRV_DOORBELL;
 340                 reg->iop2drv_doorbell_mask_reg = mem_base0 +
 341                                                 ARCMSR_IOP2DRV_DOORBELL_MASK;
 342                 reg->ioctl_wbuffer_reg = mem_base1 + ARCMSR_IOCTL_WBUFFER;
 343                 reg->ioctl_rbuffer_reg = mem_base1 + ARCMSR_IOCTL_RBUFFER;
 344                 reg->msgcode_rwbuffer_reg = mem_base1 + ARCMSR_MSGCODE_RWBUFFER;
 345
 346                 acb->vir2phy_offset = (unsigned long)ccb_tmp -(unsigned long)dma_addr;
 347                 for (i = 0; i < ARCMSR_MAX_TARGETID; i++)
 348                         for (j = 0; j < ARCMSR_MAX_TARGETLUN; j++)
 349                                 acb->devstate[i][j] = ARECA_RAID_GOOD;
 350
 351                 /*
 352                 ** here we need to tell iop 331 our ccb_tmp.HighPart
 353                 ** if ccb_tmp.HighPart is not zero
 354                 */
 355                 intmask_org = arcmsr_disable_outbound_ints(acb);
 356                 }
 357                 break;
 358         }
 359         return 0;
 360 }
 361
 362 static int arcmsr_probe(struct pci_dev *pdev,
 363         const struct pci_device_id *id)
 364 {
 365         struct Scsi_Host *host;
 366         struct AdapterControlBlock *acb;
 367         uint8_t bus, dev_fun;
 368         int error;
 369
 370         error = pci_enable_device(pdev);
 371         if (error)
 372                 goto out;
 373         pci_set_master(pdev);
 374
 375         host = scsi_host_alloc(&arcmsr_scsi_host_template,
 376                         sizeof(struct AdapterControlBlock));
 377         if (!host) {
 378                 error = -ENOMEM;
 379                 goto out_disable_device;
 380         }
 381         acb = (struct AdapterControlBlock *)host->hostdata;
 382         memset(acb, 0, sizeof (struct AdapterControlBlock));
 383
 384         error = pci_set_dma_mask(pdev, DMA_64BIT_MASK);
 385         if (error) {
 386                 error = pci_set_dma_mask(pdev, DMA_32BIT_MASK);
 387                 if (error) {
 388                         printk(KERN_WARNING
 389                                "scsi%d: No suitable DMA mask available\n",
 390                                host->host_no);
 391                         goto out_host_put;
 392                 }
 393         }
 394         bus = pdev->bus->number;
 395         dev_fun = pdev->devfn;
 396         acb->host = host;
 397         acb->pdev = pdev;
 398         host->max_sectors = ARCMSR_MAX_XFER_SECTORS;
 399         host->max_lun = ARCMSR_MAX_TARGETLUN;
 400         host->max_id = ARCMSR_MAX_TARGETID;/*16:8*/
 401         host->max_cmd_len = 16;    /*this is issue of 64bit LBA, over 2T byte*/
 402         host->sg_tablesize = ARCMSR_MAX_SG_ENTRIES;
 403         host->can_queue = ARCMSR_MAX_FREECCB_NUM; /* max simultaneous cmds */
 404         host->cmd_per_lun = ARCMSR_MAX_CMD_PERLUN;
 405         host->this_id = ARCMSR_SCSI_INITIATOR_ID;
 406         host->unique_id = (bus << 8) | dev_fun;
 407         host->irq = pdev->irq;
 408         error = pci_request_regions(pdev, "arcmsr");
 409         if (error) {
 410                 goto out_host_put;
 411         }
 412         arcmsr_define_adapter_type(acb);
 413
 414         acb->acb_flags |= (ACB_F_MESSAGE_WQBUFFER_CLEARED |
 415                            ACB_F_MESSAGE_RQBUFFER_CLEARED |
 416                            ACB_F_MESSAGE_WQBUFFER_READED);
 417         acb->acb_flags &= ~ACB_F_SCSISTOPADAPTER;
 418         INIT_LIST_HEAD(&acb->ccb_free_list);
 419
 420         error = arcmsr_alloc_ccb_pool(acb);
 421         if (error)
 422                 goto out_release_regions;
 423
 424         error = request_irq(pdev->irq, arcmsr_do_interrupt,
 425                             IRQF_SHARED, "arcmsr", acb);
 426         if (error)
 427                 goto out_free_ccb_pool;
 428
 429         arcmsr_iop_init(acb);
 430         pci_set_drvdata(pdev, host);
 431         if (strncmp(acb->firm_version, "V1.42", 5) >= 0)
 432                 host->max_sectors= ARCMSR_MAX_XFER_SECTORS_B;
 433
 434         error = scsi_add_host(host, &pdev->dev);
 435         if (error)
 436                 goto out_free_irq;
 437
 438         error = arcmsr_alloc_sysfs_attr(acb);
 439         if (error)
 440                 goto out_free_sysfs;
 441
 442         scsi_scan_host(host);
 443         #ifdef CONFIG_SCSI_ARCMSR_AER
 444         pci_enable_pcie_error_reporting(pdev);
 445         #endif
 446         return 0;
 447  out_free_sysfs:
 448  out_free_irq:
 449         free_irq(pdev->irq, acb);
 450  out_free_ccb_pool:
 451         arcmsr_free_ccb_pool(acb);
 452         iounmap(acb->pmu);
 453  out_release_regions:
 454         pci_release_regions(pdev);
 455  out_host_put:
 456         scsi_host_put(host);
 457  out_disable_device:
 458         pci_disable_device(pdev);
 459  out:
 460         return error;
 461 }
 462
 463 static uint8_t arcmsr_hba_wait_msgint_ready(struct AdapterControlBlock *acb)
 464 {
 465         struct MessageUnit_A __iomem *reg = acb->pmuA;
 466         uint32_t Index;
 467         uint8_t Retries = 0x00;
 468
 469         do {
 470                 for (Index = 0; Index < 100; Index++) {
 471                         if (readl(&reg->outbound_intstatus) &
 472                                         ARCMSR_MU_OUTBOUND_MESSAGE0_INT) {
 473                                 writel(ARCMSR_MU_OUTBOUND_MESSAGE0_INT,
 474                                         &reg->outbound_intstatus);
 475                                 return 0x00;
 476                         }
 477                         msleep(10);
 478                 }/*max 1 seconds*/
 479
 480         } while (Retries++ < 20);/*max 20 sec*/
 481         return 0xff;
 482 }
 483
 484 static uint8_t arcmsr_hbb_wait_msgint_ready(struct AdapterControlBlock *acb)
 485 {
 486         struct MessageUnit_B *reg = acb->pmuB;
 487         uint32_t Index;
 488         uint8_t Retries = 0x00;
 489
 490         do {
 491                 for (Index = 0; Index < 100; Index++) {
 492                         if (readl(reg->iop2drv_doorbell_reg)
 493                                 & ARCMSR_IOP2DRV_MESSAGE_CMD_DONE) {
 494                                 writel(ARCMSR_MESSAGE_INT_CLEAR_PATTERN
 495                                         , reg->iop2drv_doorbell_reg);
 496                                 return 0x00;
 497                         }
 498                         msleep(10);
 499                 }/*max 1 seconds*/
 500
 501         } while (Retries++ < 20);/*max 20 sec*/
 502         return 0xff;
 503 }
 504
 505 static void arcmsr_abort_hba_allcmd(struct AdapterControlBlock *acb)
 506 {
 507         struct MessageUnit_A __iomem *reg = acb->pmuA;
 508
 509         writel(ARCMSR_INBOUND_MESG0_ABORT_CMD, &reg->inbound_msgaddr0);
 510         if (arcmsr_hba_wait_msgint_ready(acb))
 511                 printk(KERN_NOTICE
 512                         "arcmsr%d: wait 'abort all outstanding command' timeout \n"
 513                         , acb->host->host_no);
 514 }
 515
 516 static void arcmsr_abort_hbb_allcmd(struct AdapterControlBlock *acb)
 517 {
 518         struct MessageUnit_B *reg = acb->pmuB;
 519
 520         writel(ARCMSR_MESSAGE_ABORT_CMD, reg->drv2iop_doorbell_reg);
 521         if (arcmsr_hbb_wait_msgint_ready(acb))
 522                 printk(KERN_NOTICE
 523                         "arcmsr%d: wait 'abort all outstanding command' timeout \n"
 524                         , acb->host->host_no);
 525 }
 526
 527 static void arcmsr_abort_allcmd(struct AdapterControlBlock *acb)
 528 {
 529         switch (acb->adapter_type) {
 530         case ACB_ADAPTER_TYPE_A: {
 531                 arcmsr_abort_hba_allcmd(acb);
 532                 }
 533                 break;
 534
 535         case ACB_ADAPTER_TYPE_B: {
 536                 arcmsr_abort_hbb_allcmd(acb);
 537                 }
 538         }
 539 }
 540
 541 static void arcmsr_pci_unmap_dma(struct CommandControlBlock *ccb)
 542 {
 543         struct scsi_cmnd *pcmd = ccb->pcmd;
 544
 545         scsi_dma_unmap(pcmd);
 546 }
 547
 548 static void arcmsr_ccb_complete(struct CommandControlBlock *ccb, int stand_flag)
 549 {
 550         struct AdapterControlBlock *acb = ccb->acb;
 551         struct scsi_cmnd *pcmd = ccb->pcmd;
 552
 553         arcmsr_pci_unmap_dma(ccb);
 554         if (stand_flag == 1)
 555                 atomic_dec(&acb->ccboutstandingcount);
 556         ccb->startdone = ARCMSR_CCB_DONE;
 557         ccb->ccb_flags = 0;
 558         list_add_tail(&ccb->list, &acb->ccb_free_list);
 559         pcmd->scsi_done(pcmd);
 560 }
 561
 562 static void arcmsr_flush_hba_cache(struct AdapterControlBlock *acb)
 563 {
 564         struct MessageUnit_A __iomem *reg = acb->pmuA;
 565         int retry_count = 30;
 566
 567         writel(ARCMSR_INBOUND_MESG0_FLUSH_CACHE, &reg->inbound_msgaddr0);
 568         do {
 569                 if (!arcmsr_hba_wait_msgint_ready(acb))
 570                         break;
 571                 else {
 572                         retry_count--;
 573                         printk(KERN_NOTICE "arcmsr%d: wait 'flush adapter cache' \
 574                         timeout, retry count down = %d \n", acb->host->host_no, retry_count);
 575                 }
 576         } while (retry_count != 0);
 577 }
 578
 579 static void arcmsr_flush_hbb_cache(struct AdapterControlBlock *acb)
 580 {
 581         struct MessageUnit_B *reg = acb->pmuB;
 582         int retry_count = 30;
 583
 584         writel(ARCMSR_MESSAGE_FLUSH_CACHE, reg->drv2iop_doorbell_reg);
 585         do {
 586                 if (!arcmsr_hbb_wait_msgint_ready(acb))
 587                         break;
 588                 else {
 589                         retry_count--;
 590                         printk(KERN_NOTICE "arcmsr%d: wait 'flush adapter cache' \
 591                         timeout,retry count down = %d \n", acb->host->host_no, retry_count);
 592                 }
 593         } while (retry_count != 0);
 594 }
 595
 596 static void arcmsr_flush_adapter_cache(struct AdapterControlBlock *acb)
 597 {
 598         switch (acb->adapter_type) {
 599
 600         case ACB_ADAPTER_TYPE_A: {
 601                 arcmsr_flush_hba_cache(acb);
 602                 }
 603                 break;
 604
 605         case ACB_ADAPTER_TYPE_B: {
 606                 arcmsr_flush_hbb_cache(acb);
 607                 }
 608         }
 609 }
 610
 611 static void arcmsr_report_sense_info(struct CommandControlBlock *ccb)
 612 {
 613
 614         struct scsi_cmnd *pcmd = ccb->pcmd;
 615         struct SENSE_DATA *sensebuffer = (struct SENSE_DATA *)pcmd->sense_buffer;
 616
 617         pcmd->result = DID_OK << 16;
 618         if (sensebuffer) {
 619                 int sense_data_length =
 620                         sizeof(struct SENSE_DATA) < sizeof(pcmd->sense_buffer)
 621                         ? sizeof(struct SENSE_DATA) : sizeof(pcmd->sense_buffer);
 622                 memset(sensebuffer, 0, sizeof(pcmd->sense_buffer));
 623                 memcpy(sensebuffer, ccb->arcmsr_cdb.SenseData, sense_data_length);
 624                 sensebuffer->ErrorCode = SCSI_SENSE_CURRENT_ERRORS;
 625                 sensebuffer->Valid = 1;
 626         }
 627 }
 628
 629 static u32 arcmsr_disable_outbound_ints(struct AdapterControlBlock *acb)
 630 {
 631         u32 orig_mask = 0;
 632         switch (acb->adapter_type) {
 633
 634         case ACB_ADAPTER_TYPE_A : {
 635                 struct MessageUnit_A __iomem *reg = acb->pmuA;
 636                 orig_mask = readl(&reg->outbound_intmask)|\
 637                                 ARCMSR_MU_OUTBOUND_MESSAGE0_INTMASKENABLE;
 638                 writel(orig_mask|ARCMSR_MU_OUTBOUND_ALL_INTMASKENABLE, \
 639                                                 &reg->outbound_intmask);
 640                 }
 641                 break;
 642
 643         case ACB_ADAPTER_TYPE_B : {
 644                 struct MessageUnit_B *reg = acb->pmuB;
 645                 orig_mask = readl(reg->iop2drv_doorbell_mask_reg) & \
 646                                         (~ARCMSR_IOP2DRV_MESSAGE_CMD_DONE);
 647                 writel(0, reg->iop2drv_doorbell_mask_reg);
 648                 }
 649                 break;
 650         }
 651         return orig_mask;
 652 }
 653
 654 static void arcmsr_report_ccb_state(struct AdapterControlBlock *acb, \
 655                         struct CommandControlBlock *ccb, uint32_t flag_ccb)
 656 {
 657
 658         uint8_t id, lun;
 659         id = ccb->pcmd->device->id;
 660         lun = ccb->pcmd->device->lun;
 661         if (!(flag_ccb & ARCMSR_CCBREPLY_FLAG_ERROR)) {
 662                 if (acb->devstate[id][lun] == ARECA_RAID_GONE)
 663                         acb->devstate[id][lun] = ARECA_RAID_GOOD;
 664                         ccb->pcmd->result = DID_OK << 16;
 665                         arcmsr_ccb_complete(ccb, 1);
 666         } else {
 667                 switch (ccb->arcmsr_cdb.DeviceStatus) {
 668                 case ARCMSR_DEV_SELECT_TIMEOUT: {
 669                         acb->devstate[id][lun] = ARECA_RAID_GONE;
 670                         ccb->pcmd->result = DID_NO_CONNECT << 16;
 671                         arcmsr_ccb_complete(ccb, 1);
 672                         }
 673                         break;
 674
 675                 case ARCMSR_DEV_ABORTED:
 676
 677                 case ARCMSR_DEV_INIT_FAIL: {
 678                         acb->devstate[id][lun] = ARECA_RAID_GONE;
 679                         ccb->pcmd->result = DID_BAD_TARGET << 16;
 680                         arcmsr_ccb_complete(ccb, 1);
 681                         }
 682                         break;
 683
 684                 case ARCMSR_DEV_CHECK_CONDITION: {
 685                         acb->devstate[id][lun] = ARECA_RAID_GOOD;
 686                         arcmsr_report_sense_info(ccb);
 687                         arcmsr_ccb_complete(ccb, 1);
 688                         }
 689                         break;
 690
 691                 default:
 692                                 printk(KERN_NOTICE
 693                                         "arcmsr%d: scsi id = %d lun = %d"
 694                                         " isr get command error done, "
 695                                         "but got unknown DeviceStatus = 0x%x \n"
 696                                         , acb->host->host_no
 697                                         , id
 698                                         , lun
 699                                         , ccb->arcmsr_cdb.DeviceStatus);
 700                                         acb->devstate[id][lun] = ARECA_RAID_GONE;
 701                                         ccb->pcmd->result = DID_NO_CONNECT << 16;
 702                                         arcmsr_ccb_complete(ccb, 1);
 703                         break;
 704                 }
 705         }
 706 }
 707
 708 static void arcmsr_drain_donequeue(struct AdapterControlBlock *acb, uint32_t flag_ccb)
 709
 710 {
 711         struct CommandControlBlock *ccb;
 712
 713         ccb = (struct CommandControlBlock *)(acb->vir2phy_offset + (flag_ccb << 5));
 714         if ((ccb->acb != acb) || (ccb->startdone != ARCMSR_CCB_START)) {
 715                 if (ccb->startdone == ARCMSR_CCB_ABORTED) {
 716                         struct scsi_cmnd *abortcmd = ccb->pcmd;
 717                         if (abortcmd) {
 718                                 abortcmd->result |= DID_ABORT << 16;
 719                                 arcmsr_ccb_complete(ccb, 1);
 720                                 printk(KERN_NOTICE "arcmsr%d: ccb ='0x%p' \
 721                                 isr got aborted command \n", acb->host->host_no, ccb);
 722                         }
 723                 }
 724                 printk(KERN_NOTICE "arcmsr%d: isr get an illegal ccb command \
 725                                 done acb = '0x%p'"
 726                                 "ccb = '0x%p' ccbacb = '0x%p' startdone = 0x%x"
 727                                 " ccboutstandingcount = %d \n"
 728                                 , acb->host->host_no
 729                                 , acb
 730                                 , ccb
 731                                 , ccb->acb
 732                                 , ccb->startdone
 733                                 , atomic_read(&acb->ccboutstandingcount));
 734                 }
 735         arcmsr_report_ccb_state(acb, ccb, flag_ccb);
 736 }
 737
 738 static void arcmsr_done4abort_postqueue(struct AdapterControlBlock *acb)
 739 {
 740         int i = 0;
 741         uint32_t flag_ccb;
 742
 743         switch (acb->adapter_type) {
 744
 745         case ACB_ADAPTER_TYPE_A: {
 746                 struct MessageUnit_A __iomem *reg = acb->pmuA;
 747                 uint32_t outbound_intstatus;
 748                 outbound_intstatus = readl(&reg->outbound_intstatus) &
 749                                         acb->outbound_int_enable;
 750                 /*clear and abort all outbound posted Q*/
 751                 writel(outbound_intstatus, &reg->outbound_intstatus);/*clear interrupt*/
 752                 while (((flag_ccb = readl(&reg->outbound_queueport)) != 0xFFFFFFFF)
 753                                 && (i++ < ARCMSR_MAX_OUTSTANDING_CMD)) {
 754                         arcmsr_drain_donequeue(acb, flag_ccb);
 755                 }
 756                 }
 757                 break;
 758
 759         case ACB_ADAPTER_TYPE_B: {
 760                 struct MessageUnit_B *reg = acb->pmuB;
 761                 /*clear all outbound posted Q*/
 762                 for (i = 0; i < ARCMSR_MAX_HBB_POSTQUEUE; i++) {
 763                         if ((flag_ccb = readl(&reg->done_qbuffer[i])) != 0) {
 764                                 writel(0, &reg->done_qbuffer[i]);
 765                                 arcmsr_drain_donequeue(acb, flag_ccb);
 766                         }
 767                         writel(0, &reg->post_qbuffer[i]);
 768                 }
 769                 reg->doneq_index = 0;
 770                 reg->postq_index = 0;
 771                 }
 772                 break;
 773         }
 774 }
 775 static void arcmsr_remove(struct pci_dev *pdev)
 776 {
 777         struct Scsi_Host *host = pci_get_drvdata(pdev);
 778         struct AdapterControlBlock *acb =
 779                 (struct AdapterControlBlock *) host->hostdata;
 780         int poll_count = 0;
 781
 782         arcmsr_free_sysfs_attr(acb);
 783         scsi_remove_host(host);
 784         arcmsr_stop_adapter_bgrb(acb);
 785         arcmsr_flush_adapter_cache(acb);
 786         arcmsr_disable_outbound_ints(acb);
 787         acb->acb_flags |= ACB_F_SCSISTOPADAPTER;
 788         acb->acb_flags &= ~ACB_F_IOP_INITED;
 789
 790         for (poll_count = 0; poll_count < ARCMSR_MAX_OUTSTANDING_CMD; poll_count++) {
 791                 if (!atomic_read(&acb->ccboutstandingcount))
 792                         break;
 793                 arcmsr_interrupt(acb);/* FIXME: need spinlock */
 794                 msleep(25);
 795         }
 796
 797         if (atomic_read(&acb->ccboutstandingcount)) {
 798                 int i;
 799
 800                 arcmsr_abort_allcmd(acb);
 801                 arcmsr_done4abort_postqueue(acb);
 802                 for (i = 0; i < ARCMSR_MAX_FREECCB_NUM; i++) {
 803                         struct CommandControlBlock *ccb = acb->pccb_pool[i];
 804                         if (ccb->startdone == ARCMSR_CCB_START) {
 805                                 ccb->startdone = ARCMSR_CCB_ABORTED;
 806                                 ccb->pcmd->result = DID_ABORT << 16;
 807                                 arcmsr_ccb_complete(ccb, 1);
 808                         }
 809                 }
 810         }
 811
 812         free_irq(pdev->irq, acb);
 813         iounmap(acb->pmu);
 814         arcmsr_free_ccb_pool(acb);
 815         pci_release_regions(pdev);
 816
 817         scsi_host_put(host);
 818
 819         pci_disable_device(pdev);
 820         pci_set_drvdata(pdev, NULL);
 821 }
 822
 823 static void arcmsr_shutdown(struct pci_dev *pdev)
 824 {
 825         struct Scsi_Host *host = pci_get_drvdata(pdev);
 826         struct AdapterControlBlock *acb =
 827                 (struct AdapterControlBlock *)host->hostdata;
 828
 829         arcmsr_stop_adapter_bgrb(acb);
 830         arcmsr_flush_adapter_cache(acb);
 831 }
 832
 833 static int arcmsr_module_init(void)
 834 {
 835         int error = 0;
 836
 837         error = pci_register_driver(&arcmsr_pci_driver);
 838         return error;
 839 }
 840
 841 static void arcmsr_module_exit(void)
 842 {
 843         pci_unregister_driver(&arcmsr_pci_driver);
 844 }
 845 module_init(arcmsr_module_init);
 846 module_exit(arcmsr_module_exit);
 847
 848 static void arcmsr_enable_outbound_ints(struct AdapterControlBlock *acb, \
 849                                                 u32 intmask_org)
 850 {
 851         u32 mask;
 852
 853         switch (acb->adapter_type) {
 854
 855         case ACB_ADAPTER_TYPE_A : {
 856                 struct MessageUnit_A __iomem *reg = acb->pmuA;
 857                 mask = intmask_org & ~(ARCMSR_MU_OUTBOUND_POSTQUEUE_INTMASKENABLE |
 858                              ARCMSR_MU_OUTBOUND_DOORBELL_INTMASKENABLE);
 859                 writel(mask, &reg->outbound_intmask);
 860                 acb->outbound_int_enable = ~(intmask_org & mask) & 0x000000ff;
 861                 }
 862                 break;
 863
 864         case ACB_ADAPTER_TYPE_B : {
 865                 struct MessageUnit_B *reg = acb->pmuB;
 866                 mask = intmask_org | (ARCMSR_IOP2DRV_DATA_WRITE_OK | \
 867                         ARCMSR_IOP2DRV_DATA_READ_OK | ARCMSR_IOP2DRV_CDB_DONE);
 868                 writel(mask, reg->iop2drv_doorbell_mask_reg);
 869                 acb->outbound_int_enable = (intmask_org | mask) & 0x0000000f;
 870                 }
 871         }
 872 }
 873
 874 static void arcmsr_build_ccb(struct AdapterControlBlock *acb,
 875         struct CommandControlBlock *ccb, struct scsi_cmnd *pcmd)
 876 {
 877         struct ARCMSR_CDB *arcmsr_cdb = (struct ARCMSR_CDB *)&ccb->arcmsr_cdb;
 878         int8_t *psge = (int8_t *)&arcmsr_cdb->u;
 879         __le32 address_lo, address_hi;
 880         int arccdbsize = 0x30;
 881         int nseg;
 882
 883         ccb->pcmd = pcmd;
 884         memset(arcmsr_cdb, 0, sizeof(struct ARCMSR_CDB));
 885         arcmsr_cdb->Bus = 0;
 886         arcmsr_cdb->TargetID = pcmd->device->id;
 887         arcmsr_cdb->LUN = pcmd->device->lun;
 888         arcmsr_cdb->Function = 1;
 889         arcmsr_cdb->CdbLength = (uint8_t)pcmd->cmd_len;
 890         arcmsr_cdb->Context = (unsigned long)arcmsr_cdb;
 891         memcpy(arcmsr_cdb->Cdb, pcmd->cmnd, pcmd->cmd_len);
 892
 893         nseg = scsi_dma_map(pcmd);
 894         BUG_ON(nseg < 0);
 895
 896         if (nseg) {
 897                 __le32 length;
 898                 int i, cdb_sgcount = 0;
 899                 struct scatterlist *sg;
 900
 901                 /* map stor port SG list to our iop SG List. */
 902                 scsi_for_each_sg(pcmd, sg, nseg, i) {
 903                         /* Get the physical address of the current data pointer */
 904                         length = cpu_to_le32(sg_dma_len(sg));
 905                         address_lo = cpu_to_le32(dma_addr_lo32(sg_dma_address(sg)));
 906                         address_hi = cpu_to_le32(dma_addr_hi32(sg_dma_address(sg)));
 907                         if (address_hi == 0) {
 908                                 struct SG32ENTRY *pdma_sg = (struct SG32ENTRY *)psge;
 909
 910                                 pdma_sg->address = address_lo;
 911                                 pdma_sg->length = length;
 912                                 psge += sizeof (struct SG32ENTRY);
 913                                 arccdbsize += sizeof (struct SG32ENTRY);
 914                         } else {
 915                                 struct SG64ENTRY *pdma_sg = (struct SG64ENTRY *)psge;
 916
 917                                 pdma_sg->addresshigh = address_hi;
 918                                 pdma_sg->address = address_lo;
 919                                 pdma_sg->length = length|IS_SG64_ADDR;
 920                                 psge += sizeof (struct SG64ENTRY);
 921                                 arccdbsize += sizeof (struct SG64ENTRY);
 922                         }
 923                         cdb_sgcount++;
 924                 }
 925                 arcmsr_cdb->sgcount = (uint8_t)cdb_sgcount;
 926                 arcmsr_cdb->DataLength = scsi_bufflen(pcmd);
 927                 if ( arccdbsize > 256)
 928                         arcmsr_cdb->Flags |= ARCMSR_CDB_FLAG_SGL_BSIZE;
 929         }
 930         if (pcmd->sc_data_direction == DMA_TO_DEVICE ) {
 931                 arcmsr_cdb->Flags |= ARCMSR_CDB_FLAG_WRITE;
 932                 ccb->ccb_flags |= CCB_FLAG_WRITE;
 933         }
 934 }
 935
 936 static void arcmsr_post_ccb(struct AdapterControlBlock *acb, struct CommandControlBlock *ccb)
 937 {
 938         uint32_t cdb_shifted_phyaddr = ccb->cdb_shifted_phyaddr;
 939         struct ARCMSR_CDB *arcmsr_cdb = (struct ARCMSR_CDB *)&ccb->arcmsr_cdb;
 940         atomic_inc(&acb->ccboutstandingcount);
 941         ccb->startdone = ARCMSR_CCB_START;
 942
 943         switch (acb->adapter_type) {
 944         case ACB_ADAPTER_TYPE_A: {
 945                 struct MessageUnit_A __iomem *reg = acb->pmuA;
 946
 947                 if (arcmsr_cdb->Flags & ARCMSR_CDB_FLAG_SGL_BSIZE)
 948                         writel(cdb_shifted_phyaddr | ARCMSR_CCBPOST_FLAG_SGL_BSIZE,
 949                         &reg->inbound_queueport);
 950                 else {
 951                                 writel(cdb_shifted_phyaddr, &reg->inbound_queueport);
 952                 }
 953                 }
 954                 break;
 955
 956         case ACB_ADAPTER_TYPE_B: {
 957                 struct MessageUnit_B *reg = acb->pmuB;
 958                 uint32_t ending_index, index = reg->postq_index;
 959
 960                 ending_index = ((index + 1) % ARCMSR_MAX_HBB_POSTQUEUE);
 961                 writel(0, &reg->post_qbuffer[ending_index]);
 962                 if (arcmsr_cdb->Flags & ARCMSR_CDB_FLAG_SGL_BSIZE) {
 963                         writel(cdb_shifted_phyaddr | ARCMSR_CCBPOST_FLAG_SGL_BSIZE,\
 964                                                  &reg->post_qbuffer[index]);
 965                 }
 966                 else {
 967                         writel(cdb_shifted_phyaddr, &reg->post_qbuffer[index]);
 968                 }
 969                 index++;
 970                 index %= ARCMSR_MAX_HBB_POSTQUEUE;/*if last index number set it to 0 */
 971                 reg->postq_index = index;
 972                 writel(ARCMSR_DRV2IOP_CDB_POSTED, reg->drv2iop_doorbell_reg);
 973                 }
 974                 break;
 975         }
 976 }
 977
 978 static void arcmsr_stop_hba_bgrb(struct AdapterControlBlock *acb)
 979 {
 980         struct MessageUnit_A __iomem *reg = acb->pmuA;
 981         acb->acb_flags &= ~ACB_F_MSG_START_BGRB;
 982         writel(ARCMSR_INBOUND_MESG0_STOP_BGRB, &reg->inbound_msgaddr0);
 983
 984         if (arcmsr_hba_wait_msgint_ready(acb)) {
 985                 printk(KERN_NOTICE
 986                         "arcmsr%d: wait 'stop adapter background rebulid' timeout \n"
 987                         , acb->host->host_no);
 988         }
 989 }
 990
 991 static void arcmsr_stop_hbb_bgrb(struct AdapterControlBlock *acb)
 992 {
 993         struct MessageUnit_B *reg = acb->pmuB;
 994         acb->acb_flags &= ~ACB_F_MSG_START_BGRB;
 995         writel(ARCMSR_MESSAGE_STOP_BGRB, reg->drv2iop_doorbell_reg);
 996
 997         if (arcmsr_hbb_wait_msgint_ready(acb)) {
 998                 printk(KERN_NOTICE
 999                         "arcmsr%d: wait 'stop adapter background rebulid' timeout \n"
1000                         , acb->host->host_no);
1001         }
1002 }
1003
1004 static void arcmsr_stop_adapter_bgrb(struct AdapterControlBlock *acb)
1005 {
1006         switch (acb->adapter_type) {
1007         case ACB_ADAPTER_TYPE_A: {
1008                 arcmsr_stop_hba_bgrb(acb);
1009                 }
1010                 break;
1011
1012         case ACB_ADAPTER_TYPE_B: {
1013                 arcmsr_stop_hbb_bgrb(acb);
1014                 }
1015                 break;
1016         }
1017 }
1018
1019 static void arcmsr_free_ccb_pool(struct AdapterControlBlock *acb)
1020 {
1021         dma_free_coherent(&acb->pdev->dev,
1022                 ARCMSR_MAX_FREECCB_NUM * sizeof (struct CommandControlBlock) + 0x20,
1023                 acb->dma_coherent,
1024                 acb->dma_coherent_handle);
1025 }
1026
1027 void arcmsr_iop_message_read(struct AdapterControlBlock *acb)
1028 {
1029         switch (acb->adapter_type) {
1030         case ACB_ADAPTER_TYPE_A: {
1031                 struct MessageUnit_A __iomem *reg = acb->pmuA;
1032                 writel(ARCMSR_INBOUND_DRIVER_DATA_READ_OK, &reg->inbound_doorbell);
1033                 }
1034                 break;
1035
1036         case ACB_ADAPTER_TYPE_B: {
1037                 struct MessageUnit_B *reg = acb->pmuB;
1038                 writel(ARCMSR_DRV2IOP_DATA_READ_OK, reg->drv2iop_doorbell_reg);
1039                 }
1040                 break;
1041         }
1042 }
1043
1044 static void arcmsr_iop_message_wrote(struct AdapterControlBlock *acb)
1045 {
1046         switch (acb->adapter_type) {
1047         case ACB_ADAPTER_TYPE_A: {
1048                 struct MessageUnit_A __iomem *reg = acb->pmuA;
1049                 /*
1050                 ** push inbound doorbell tell iop, driver data write ok
1051                 ** and wait reply on next hwinterrupt for next Qbuffer post
1052                 */
1053                 writel(ARCMSR_INBOUND_DRIVER_DATA_WRITE_OK, &reg->inbound_doorbell);
1054                 }
1055                 break;
1056
1057         case ACB_ADAPTER_TYPE_B: {
1058                 struct MessageUnit_B *reg = acb->pmuB;
1059                 /*
1060                 ** push inbound doorbell tell iop, driver data write ok
1061                 ** and wait reply on next hwinterrupt for next Qbuffer post
1062                 */
1063                 writel(ARCMSR_DRV2IOP_DATA_WRITE_OK, reg->drv2iop_doorbell_reg);
1064                 }
1065                 break;
1066         }
1067 }
1068
1069 struct QBUFFER __iomem *arcmsr_get_iop_rqbuffer(struct AdapterControlBlock *acb)
1070 {
1071         static struct QBUFFER __iomem *qbuffer;
1072
1073         switch (acb->adapter_type) {
1074
1075         case ACB_ADAPTER_TYPE_A: {
1076                 struct MessageUnit_A __iomem *reg = acb->pmuA;
1077                 qbuffer = (struct QBUFFER __iomem *)&reg->message_rbuffer;
1078                 }
1079                 break;
1080
1081         case ACB_ADAPTER_TYPE_B: {
1082                 struct MessageUnit_B *reg = acb->pmuB;
1083                 qbuffer = (struct QBUFFER __iomem *)reg->ioctl_rbuffer_reg;
1084                 }
1085                 break;
1086         }
1087         return qbuffer;
1088 }
1089
1090 static struct QBUFFER __iomem *arcmsr_get_iop_wqbuffer(struct AdapterControlBlock *acb)
1091 {
1092         static struct QBUFFER __iomem *pqbuffer;
1093
1094         switch (acb->adapter_type) {
1095
1096         case ACB_ADAPTER_TYPE_A: {
1097                 struct MessageUnit_A __iomem *reg = acb->pmuA;
1098                 pqbuffer = (struct QBUFFER __iomem *) &reg->message_wbuffer;
1099                 }
1100                 break;
1101
1102         case ACB_ADAPTER_TYPE_B: {
1103                 struct MessageUnit_B  *reg = acb->pmuB;
1104                 pqbuffer = (struct QBUFFER __iomem *)reg->ioctl_wbuffer_reg;
1105                 }
1106                 break;
1107         }
1108         return pqbuffer;
1109 }
1110
1111 static void arcmsr_iop2drv_data_wrote_handle(struct AdapterControlBlock *acb)
1112 {
1113         struct QBUFFER __iomem *prbuffer;
1114         struct QBUFFER *pQbuffer;
1115         uint8_t __iomem *iop_data;
1116         int32_t my_empty_len, iop_len, rqbuf_firstindex, rqbuf_lastindex;
1117
1118         rqbuf_lastindex = acb->rqbuf_lastindex;
1119         rqbuf_firstindex = acb->rqbuf_firstindex;
1120         prbuffer = arcmsr_get_iop_rqbuffer(acb);
1121         iop_data = (uint8_t __iomem *)prbuffer->data;
1122         iop_len = prbuffer->data_len;
1123         my_empty_len = (rqbuf_firstindex - rqbuf_lastindex -1)&(ARCMSR_MAX_QBUFFER -1);
1124
1125         if (my_empty_len >= iop_len)
1126         {
1127                 while (iop_len > 0) {
1128                         pQbuffer = (struct QBUFFER *)&acb->rqbuffer[rqbuf_lastindex];
1129                         memcpy(pQbuffer, iop_data,1);
1130                         rqbuf_lastindex++;
1131                         rqbuf_lastindex %= ARCMSR_MAX_QBUFFER;
1132                         iop_data++;
1133                         iop_len--;
1134                 }
1135                 acb->rqbuf_lastindex = rqbuf_lastindex;
1136                 arcmsr_iop_message_read(acb);
1137         }
1138
1139         else {
1140                 acb->acb_flags |= ACB_F_IOPDATA_OVERFLOW;
1141         }
1142 }
1143
1144 static void arcmsr_iop2drv_data_read_handle(struct AdapterControlBlock *acb)
1145 {
1146         acb->acb_flags |= ACB_F_MESSAGE_WQBUFFER_READED;
1147         if (acb->wqbuf_firstindex != acb->wqbuf_lastindex) {
1148                 uint8_t *pQbuffer;
1149                 struct QBUFFER __iomem *pwbuffer;
1150                 uint8_t __iomem *iop_data;
1151                 int32_t allxfer_len = 0;
1152
1153                 acb->acb_flags &= (~ACB_F_MESSAGE_WQBUFFER_READED);
1154                 pwbuffer = arcmsr_get_iop_wqbuffer(acb);
1155                 iop_data = (uint8_t __iomem *)pwbuffer->data;
1156
1157                 while ((acb->wqbuf_firstindex != acb->wqbuf_lastindex) && \
1158                                                         (allxfer_len < 124)) {
1159                         pQbuffer = &acb->wqbuffer[acb->wqbuf_firstindex];
1160                         memcpy(iop_data, pQbuffer, 1);
1161                         acb->wqbuf_firstindex++;
1162                         acb->wqbuf_firstindex %= ARCMSR_MAX_QBUFFER;
1163                         iop_data++;
1164                         allxfer_len++;
1165                 }
1166                 pwbuffer->data_len = allxfer_len;
1167
1168                 arcmsr_iop_message_wrote(acb);
1169         }
1170
1171         if (acb->wqbuf_firstindex == acb->wqbuf_lastindex) {
1172                 acb->acb_flags |= ACB_F_MESSAGE_WQBUFFER_CLEARED;
1173         }
1174 }
1175
1176 static void arcmsr_hba_doorbell_isr(struct AdapterControlBlock *acb)
1177 {
1178         uint32_t outbound_doorbell;
1179         struct MessageUnit_A __iomem *reg = acb->pmuA;
1180
1181         outbound_doorbell = readl(&reg->outbound_doorbell);
1182         writel(outbound_doorbell, &reg->outbound_doorbell);
1183         if (outbound_doorbell & ARCMSR_OUTBOUND_IOP331_DATA_WRITE_OK) {
1184                 arcmsr_iop2drv_data_wrote_handle(acb);
1185         }
1186
1187         if (outbound_doorbell & ARCMSR_OUTBOUND_IOP331_DATA_READ_OK)    {
1188                 arcmsr_iop2drv_data_read_handle(acb);
1189         }
1190 }
1191
1192 static void arcmsr_hba_postqueue_isr(struct AdapterControlBlock *acb)
1193 {
1194         uint32_t flag_ccb;
1195         struct MessageUnit_A __iomem *reg = acb->pmuA;
1196
1197         while ((flag_ccb = readl(&reg->outbound_queueport)) != 0xFFFFFFFF) {
1198                 arcmsr_drain_donequeue(acb, flag_ccb);
1199         }
1200 }
1201
1202 static void arcmsr_hbb_postqueue_isr(struct AdapterControlBlock *acb)
1203 {
1204         uint32_t index;
1205         uint32_t flag_ccb;
1206         struct MessageUnit_B *reg = acb->pmuB;
1207
1208         index = reg->doneq_index;
1209
1210         while ((flag_ccb = readl(&reg->done_qbuffer[index])) != 0) {
1211                 writel(0, &reg->done_qbuffer[index]);
1212                 arcmsr_drain_donequeue(acb, flag_ccb);
1213                 index++;
1214                 index %= ARCMSR_MAX_HBB_POSTQUEUE;
1215                 reg->doneq_index = index;
1216         }
1217 }
1218
1219 static int arcmsr_handle_hba_isr(struct AdapterControlBlock *acb)
1220 {
1221         uint32_t outbound_intstatus;
1222         struct MessageUnit_A __iomem *reg = acb->pmuA;
1223
1224         outbound_intstatus = readl(&reg->outbound_intstatus) & \
1225                                                         acb->outbound_int_enable;
1226         if (!(outbound_intstatus & ARCMSR_MU_OUTBOUND_HANDLE_INT))      {
1227                 return 1;
1228         }
1229         writel(outbound_intstatus, &reg->outbound_intstatus);
1230         if (outbound_intstatus & ARCMSR_MU_OUTBOUND_DOORBELL_INT)       {
1231                 arcmsr_hba_doorbell_isr(acb);
1232         }
1233         if (outbound_intstatus & ARCMSR_MU_OUTBOUND_POSTQUEUE_INT) {
1234                 arcmsr_hba_postqueue_isr(acb);
1235         }
1236         return 0;
1237 }
1238
1239 static int arcmsr_handle_hbb_isr(struct AdapterControlBlock *acb)
1240 {
1241         uint32_t outbound_doorbell;
1242         struct MessageUnit_B *reg = acb->pmuB;
1243
1244         outbound_doorbell = readl(reg->iop2drv_doorbell_reg) & \
1245                                                         acb->outbound_int_enable;
1246         if (!outbound_doorbell)
1247                 return 1;
1248
1249         writel(~outbound_doorbell, reg->iop2drv_doorbell_reg);
1250
1251         if (outbound_doorbell & ARCMSR_IOP2DRV_DATA_WRITE_OK)   {
1252                 arcmsr_iop2drv_data_wrote_handle(acb);
1253         }
1254         if (outbound_doorbell & ARCMSR_IOP2DRV_DATA_READ_OK) {
1255                 arcmsr_iop2drv_data_read_handle(acb);
1256         }
1257         if (outbound_doorbell & ARCMSR_IOP2DRV_CDB_DONE) {
1258                 arcmsr_hbb_postqueue_isr(acb);
1259         }
1260
1261         return 0;
1262 }
1263
1264 static irqreturn_t arcmsr_interrupt(struct AdapterControlBlock *acb)
1265 {
1266         switch (acb->adapter_type) {
1267         case ACB_ADAPTER_TYPE_A: {
1268                 if (arcmsr_handle_hba_isr(acb)) {
1269                         return IRQ_NONE;
1270                 }
1271                 }
1272                 break;
1273
1274         case ACB_ADAPTER_TYPE_B: {
1275                 if (arcmsr_handle_hbb_isr(acb)) {
1276                         return IRQ_NONE;
1277                 }
1278                 }
1279                 break;
1280         }
1281         return IRQ_HANDLED;
1282 }
1283
1284 static void arcmsr_iop_parking(struct AdapterControlBlock *acb)
1285 {
1286         if (acb) {
1287                 /* stop adapter background rebuild */
1288                 if (acb->acb_flags & ACB_F_MSG_START_BGRB) {
1289                         uint32_t intmask_org;
1290                         acb->acb_flags &= ~ACB_F_MSG_START_BGRB;
1291                         intmask_org = arcmsr_disable_outbound_ints(acb);
1292                         arcmsr_stop_adapter_bgrb(acb);
1293                         arcmsr_flush_adapter_cache(acb);
1294                         arcmsr_enable_outbound_ints(acb, intmask_org);
1295                 }
1296         }
1297 }
1298
1299 void arcmsr_post_ioctldata2iop(struct AdapterControlBlock *acb)
1300 {
1301         int32_t wqbuf_firstindex, wqbuf_lastindex;
1302         uint8_t *pQbuffer;
1303         struct QBUFFER __iomem *pwbuffer;
1304         uint8_t __iomem *iop_data;
1305         int32_t allxfer_len = 0;
1306
1307         pwbuffer = arcmsr_get_iop_wqbuffer(acb);
1308         iop_data = (uint8_t __iomem *)pwbuffer->data;
1309         if (acb->acb_flags & ACB_F_MESSAGE_WQBUFFER_READED) {
1310                 acb->acb_flags &= (~ACB_F_MESSAGE_WQBUFFER_READED);
1311                 wqbuf_firstindex = acb->wqbuf_firstindex;
1312                 wqbuf_lastindex = acb->wqbuf_lastindex;
1313                 while ((wqbuf_firstindex != wqbuf_lastindex) && (allxfer_len < 124)) {
1314                         pQbuffer = &acb->wqbuffer[wqbuf_firstindex];
1315                         memcpy(iop_data, pQbuffer, 1);
1316                         wqbuf_firstindex++;
1317                         wqbuf_firstindex %= ARCMSR_MAX_QBUFFER;
1318                         iop_data++;
1319                         allxfer_len++;
1320                 }
1321                 acb->wqbuf_firstindex = wqbuf_firstindex;
1322                 pwbuffer->data_len = allxfer_len;
1323                 arcmsr_iop_message_wrote(acb);
1324         }
1325 }
1326
1327 static int arcmsr_iop_message_xfer(struct AdapterControlBlock *acb, \
1328                                         struct scsi_cmnd *cmd)
1329 {
1330         struct CMD_MESSAGE_FIELD *pcmdmessagefld;
1331         int retvalue = 0, transfer_len = 0;
1332         char *buffer;
1333         struct scatterlist *sg;
1334         uint32_t controlcode = (uint32_t ) cmd->cmnd[5] << 24 |
1335                                                 (uint32_t ) cmd->cmnd[6] << 16 |
1336                                                 (uint32_t ) cmd->cmnd[7] << 8  |
1337                                                 (uint32_t ) cmd->cmnd[8];
1338                                                 /* 4 bytes: Areca io control code */
1339
1340         sg = scsi_sglist(cmd);
1341         buffer = kmap_atomic(sg_page(sg), KM_IRQ0) + sg->offset;
1342         if (scsi_sg_count(cmd) > 1) {
1343                 retvalue = ARCMSR_MESSAGE_FAIL;
1344                 goto message_out;
1345         }
1346         transfer_len += sg->length;
1347
1348         if (transfer_len > sizeof(struct CMD_MESSAGE_FIELD)) {
1349                 retvalue = ARCMSR_MESSAGE_FAIL;
1350                 goto message_out;
1351         }
1352         pcmdmessagefld = (struct CMD_MESSAGE_FIELD *) buffer;
1353         switch(controlcode) {
1354
1355         case ARCMSR_MESSAGE_READ_RQBUFFER: {
1356                 unsigned long *ver_addr;
1357                 dma_addr_t buf_handle;
1358                 uint8_t *pQbuffer, *ptmpQbuffer;
1359                 int32_t allxfer_len = 0;
1360
1361                 ver_addr = pci_alloc_consistent(acb->pdev, 1032, &buf_handle);
1362                 if (!ver_addr) {
1363                         retvalue = ARCMSR_MESSAGE_FAIL;
1364                         goto message_out;
1365                 }
1366                 ptmpQbuffer = (uint8_t *) ver_addr;
1367                 while ((acb->rqbuf_firstindex != acb->rqbuf_lastindex)
1368                         && (allxfer_len < 1031)) {
1369                         pQbuffer = &acb->rqbuffer[acb->rqbuf_firstindex];
1370                         memcpy(ptmpQbuffer, pQbuffer, 1);
1371                         acb->rqbuf_firstindex++;
1372                         acb->rqbuf_firstindex %= ARCMSR_MAX_QBUFFER;
1373                         ptmpQbuffer++;
1374                         allxfer_len++;
1375                 }
1376                 if (acb->acb_flags & ACB_F_IOPDATA_OVERFLOW) {
1377
1378                         struct QBUFFER __iomem *prbuffer;
1379                         uint8_t __iomem *iop_data;
1380                         int32_t iop_len;
1381
1382                         acb->acb_flags &= ~ACB_F_IOPDATA_OVERFLOW;
1383                         prbuffer = arcmsr_get_iop_rqbuffer(acb);
1384                         iop_data = prbuffer->data;
1385                         iop_len = readl(&prbuffer->data_len);
1386                         while (iop_len > 0) {
1387                                 acb->rqbuffer[acb->rqbuf_lastindex] = readb(iop_data);
1388                                 acb->rqbuf_lastindex++;
1389                                 acb->rqbuf_lastindex %= ARCMSR_MAX_QBUFFER;
1390                                 iop_data++;
1391                                 iop_len--;
1392                         }
1393                         arcmsr_iop_message_read(acb);
1394                 }
1395                 memcpy(pcmdmessagefld->messagedatabuffer, (uint8_t *)ver_addr, allxfer_len);
1396                 pcmdmessagefld->cmdmessage.Length = allxfer_len;
1397                 pcmdmessagefld->cmdmessage.ReturnCode = ARCMSR_MESSAGE_RETURNCODE_OK;
1398                 pci_free_consistent(acb->pdev, 1032, ver_addr, buf_handle);
1399                 }
1400                 break;
1401
1402         case ARCMSR_MESSAGE_WRITE_WQBUFFER: {
1403                 unsigned long *ver_addr;
1404                 dma_addr_t buf_handle;
1405                 int32_t my_empty_len, user_len, wqbuf_firstindex, wqbuf_lastindex;
1406                 uint8_t *pQbuffer, *ptmpuserbuffer;
1407
1408                 ver_addr = pci_alloc_consistent(acb->pdev, 1032, &buf_handle);
1409                 if (!ver_addr) {
1410                         retvalue = ARCMSR_MESSAGE_FAIL;
1411                         goto message_out;
1412                 }
1413                 ptmpuserbuffer = (uint8_t *)ver_addr;
1414                 user_len = pcmdmessagefld->cmdmessage.Length;
1415                 memcpy(ptmpuserbuffer, pcmdmessagefld->messagedatabuffer, user_len);
1416                 wqbuf_lastindex = acb->wqbuf_lastindex;
1417                 wqbuf_firstindex = acb->wqbuf_firstindex;
1418                 if (wqbuf_lastindex != wqbuf_firstindex) {
1419                         struct SENSE_DATA *sensebuffer =
1420                                 (struct SENSE_DATA *)cmd->sense_buffer;
1421                         arcmsr_post_ioctldata2iop(acb);
1422                         /* has error report sensedata */
1423                         sensebuffer->ErrorCode = 0x70;
1424                         sensebuffer->SenseKey = ILLEGAL_REQUEST;
1425                         sensebuffer->AdditionalSenseLength = 0x0A;
1426                         sensebuffer->AdditionalSenseCode = 0x20;
1427                         sensebuffer->Valid = 1;
1428                         retvalue = ARCMSR_MESSAGE_FAIL;
1429                 } else {
1430                         my_empty_len = (wqbuf_firstindex-wqbuf_lastindex - 1)
1431                                 &(ARCMSR_MAX_QBUFFER - 1);
1432                         if (my_empty_len >= user_len) {
1433                                 while (user_len > 0) {
1434                                         pQbuffer =
1435                                         &acb->wqbuffer[acb->wqbuf_lastindex];
1436                                         memcpy(pQbuffer, ptmpuserbuffer, 1);
1437                                         acb->wqbuf_lastindex++;
1438                                         acb->wqbuf_lastindex %= ARCMSR_MAX_QBUFFER;
1439                                         ptmpuserbuffer++;
1440                                         user_len--;
1441                                 }
1442                                 if (acb->acb_flags & ACB_F_MESSAGE_WQBUFFER_CLEARED) {
1443                                         acb->acb_flags &=
1444                                                 ~ACB_F_MESSAGE_WQBUFFER_CLEARED;
1445                                         arcmsr_post_ioctldata2iop(acb);
1446                                 }
1447                         } else {
1448                                 /* has error report sensedata */
1449                                 struct SENSE_DATA *sensebuffer =
1450                                         (struct SENSE_DATA *)cmd->sense_buffer;
1451                                 sensebuffer->ErrorCode = 0x70;
1452                                 sensebuffer->SenseKey = ILLEGAL_REQUEST;
1453                                 sensebuffer->AdditionalSenseLength = 0x0A;
1454                                 sensebuffer->AdditionalSenseCode = 0x20;
1455                                 sensebuffer->Valid = 1;
1456                                 retvalue = ARCMSR_MESSAGE_FAIL;
1457                         }
1458                         }
1459                         pci_free_consistent(acb->pdev, 1032, ver_addr, buf_handle);
1460                 }
1461                 break;
1462
1463         case ARCMSR_MESSAGE_CLEAR_RQBUFFER: {
1464                 uint8_t *pQbuffer = acb->rqbuffer;
1465
1466                 if (acb->acb_flags & ACB_F_IOPDATA_OVERFLOW) {
1467                         acb->acb_flags &= ~ACB_F_IOPDATA_OVERFLOW;
1468                         arcmsr_iop_message_read(acb);
1469                 }
1470                 acb->acb_flags |= ACB_F_MESSAGE_RQBUFFER_CLEARED;
1471                 acb->rqbuf_firstindex = 0;
1472                 acb->rqbuf_lastindex = 0;
1473                 memset(pQbuffer, 0, ARCMSR_MAX_QBUFFER);
1474                 pcmdmessagefld->cmdmessage.ReturnCode = ARCMSR_MESSAGE_RETURNCODE_OK;
1475                 }
1476                 break;
1477
1478         case ARCMSR_MESSAGE_CLEAR_WQBUFFER: {
1479                 uint8_t *pQbuffer = acb->wqbuffer;
1480
1481                 if (acb->acb_flags & ACB_F_IOPDATA_OVERFLOW) {
1482                         acb->acb_flags &= ~ACB_F_IOPDATA_OVERFLOW;
1483                         arcmsr_iop_message_read(acb);
1484                 }
1485                 acb->acb_flags |=
1486                         (ACB_F_MESSAGE_WQBUFFER_CLEARED |
1487                                 ACB_F_MESSAGE_WQBUFFER_READED);
1488                 acb->wqbuf_firstindex = 0;
1489                 acb->wqbuf_lastindex = 0;
1490                 memset(pQbuffer, 0, ARCMSR_MAX_QBUFFER);
1491                 pcmdmessagefld->cmdmessage.ReturnCode =
1492                         ARCMSR_MESSAGE_RETURNCODE_OK;
1493                 }
1494                 break;
1495
1496         case ARCMSR_MESSAGE_CLEAR_ALLQBUFFER: {
1497                 uint8_t *pQbuffer;
1498
1499                 if (acb->acb_flags & ACB_F_IOPDATA_OVERFLOW) {
1500                         acb->acb_flags &= ~ACB_F_IOPDATA_OVERFLOW;
1501                         arcmsr_iop_message_read(acb);
1502                 }
1503                 acb->acb_flags |=
1504                         (ACB_F_MESSAGE_WQBUFFER_CLEARED
1505                         | ACB_F_MESSAGE_RQBUFFER_CLEARED
1506                         | ACB_F_MESSAGE_WQBUFFER_READED);
1507                 acb->rqbuf_firstindex = 0;
1508                 acb->rqbuf_lastindex = 0;
1509                 acb->wqbuf_firstindex = 0;
1510                 acb->wqbuf_lastindex = 0;
1511                 pQbuffer = acb->rqbuffer;
1512                 memset(pQbuffer, 0, sizeof(struct QBUFFER));
1513                 pQbuffer = acb->wqbuffer;
1514                 memset(pQbuffer, 0, sizeof(struct QBUFFER));
1515                 pcmdmessagefld->cmdmessage.ReturnCode = ARCMSR_MESSAGE_RETURNCODE_OK;
1516                 }
1517                 break;
1518
1519         case ARCMSR_MESSAGE_RETURN_CODE_3F: {
1520                 pcmdmessagefld->cmdmessage.ReturnCode = ARCMSR_MESSAGE_RETURNCODE_3F;
1521                 }
1522                 break;
1523
1524         case ARCMSR_MESSAGE_SAY_HELLO: {
1525                 int8_t *hello_string = "Hello! I am ARCMSR";
1526
1527                 memcpy(pcmdmessagefld->messagedatabuffer, hello_string
1528                         , (int16_t)strlen(hello_string));
1529                 pcmdmessagefld->cmdmessage.ReturnCode = ARCMSR_MESSAGE_RETURNCODE_OK;
1530                 }
1531                 break;
1532
1533         case ARCMSR_MESSAGE_SAY_GOODBYE:
1534                 arcmsr_iop_parking(acb);
1535                 break;
1536
1537         case ARCMSR_MESSAGE_FLUSH_ADAPTER_CACHE:
1538                 arcmsr_flush_adapter_cache(acb);
1539                 break;
1540
1541         default:
1542                 retvalue = ARCMSR_MESSAGE_FAIL;
1543         }
1544         message_out:
1545         sg = scsi_sglist(cmd);
1546         kunmap_atomic(buffer - sg->offset, KM_IRQ0);
1547         return retvalue;
1548 }
1549
1550 static struct CommandControlBlock *arcmsr_get_freeccb(struct AdapterControlBlock *acb)
1551 {
1552         struct list_head *head = &acb->ccb_free_list;
1553         struct CommandControlBlock *ccb = NULL;
1554
1555         if (!list_empty(head)) {
1556                 ccb = list_entry(head->next, struct CommandControlBlock, list);
1557                 list_del(head->next);
1558         }
1559         return ccb;
1560 }
1561
1562 static void arcmsr_handle_virtual_command(struct AdapterControlBlock *acb,
1563                 struct scsi_cmnd *cmd)
1564 {
1565         switch (cmd->cmnd[0]) {
1566         case INQUIRY: {
1567                 unsigned char inqdata[36];
1568                 char *buffer;
1569                 struct scatterlist *sg;
1570
1571                 if (cmd->device->lun) {
1572                         cmd->result = (DID_TIME_OUT << 16);
1573                         cmd->scsi_done(cmd);
1574                         return;
1575                 }
1576                 inqdata[0] = TYPE_PROCESSOR;
1577                 /* Periph Qualifier & Periph Dev Type */
1578                 inqdata[1] = 0;
1579                 /* rem media bit & Dev Type Modifier */
1580                 inqdata[2] = 0;
1581                 /* ISO, ECMA, & ANSI versions */
1582                 inqdata[4] = 31;
1583                 /* length of additional data */
1584                 strncpy(&inqdata[8], "Areca   ", 8);
1585                 /* Vendor Identification */
1586                 strncpy(&inqdata[16], "RAID controller ", 16);
1587                 /* Product Identification */
1588                 strncpy(&inqdata[32], "R001", 4); /* Product Revision */
1589
1590                 sg = scsi_sglist(cmd);
1591                 buffer = kmap_atomic(sg_page(sg), KM_IRQ0) + sg->offset;
1592
1593                 memcpy(buffer, inqdata, sizeof(inqdata));
1594                 sg = scsi_sglist(cmd);
1595                 kunmap_atomic(buffer - sg->offset, KM_IRQ0);
1596
1597                 cmd->scsi_done(cmd);
1598         }
1599         break;
1600         case WRITE_BUFFER:
1601         case READ_BUFFER: {
1602                 if (arcmsr_iop_message_xfer(acb, cmd))
1603                         cmd->result = (DID_ERROR << 16);
1604                 cmd->scsi_done(cmd);
1605         }
1606         break;
1607         default:
1608                 cmd->scsi_done(cmd);
1609         }
1610 }
1611
1612 static int arcmsr_queue_command(struct scsi_cmnd *cmd,
1613         void (* done)(struct scsi_cmnd *))
1614 {
1615         struct Scsi_Host *host = cmd->device->host;
1616         struct AdapterControlBlock *acb = (struct AdapterControlBlock *) host->hostdata;
1617         struct CommandControlBlock *ccb;
1618         int target = cmd->device->id;
1619         int lun = cmd->device->lun;
1620
1621         cmd->scsi_done = done;
1622         cmd->host_scribble = NULL;
1623         cmd->result = 0;
1624         if (acb->acb_flags & ACB_F_BUS_RESET) {
1625                 printk(KERN_NOTICE "arcmsr%d: bus reset"
1626                         " and return busy \n"
1627                         , acb->host->host_no);
1628                 return SCSI_MLQUEUE_HOST_BUSY;
1629         }
1630         if (target == 16) {
1631                 /* virtual device for iop message transfer */
1632                 arcmsr_handle_virtual_command(acb, cmd);
1633                 return 0;
1634         }
1635         if (acb->devstate[target][lun] == ARECA_RAID_GONE) {
1636                 uint8_t block_cmd;
1637
1638                 block_cmd = cmd->cmnd[0] & 0x0f;
1639                 if (block_cmd == 0x08 || block_cmd == 0x0a) {
1640                         printk(KERN_NOTICE
1641                                 "arcmsr%d: block 'read/write'"
1642                                 "command with gone raid volume"
1643                                 " Cmd = %2x, TargetId = %d, Lun = %d \n"
1644                                 , acb->host->host_no
1645                                 , cmd->cmnd[0]
1646                                 , target, lun);
1647                         cmd->result = (DID_NO_CONNECT << 16);
1648                         cmd->scsi_done(cmd);
1649                         return 0;
1650                 }
1651         }
1652         if (atomic_read(&acb->ccboutstandingcount) >=
1653                         ARCMSR_MAX_OUTSTANDING_CMD)
1654                 return SCSI_MLQUEUE_HOST_BUSY;
1655
1656         ccb = arcmsr_get_freeccb(acb);
1657         if (!ccb)
1658                 return SCSI_MLQUEUE_HOST_BUSY;
1659
1660         arcmsr_build_ccb(acb, ccb, cmd);
1661         arcmsr_post_ccb(acb, ccb);
1662         return 0;
1663 }
1664
1665 static void arcmsr_get_hba_config(struct AdapterControlBlock *acb)
1666 {
1667         struct MessageUnit_A __iomem *reg = acb->pmuA;
1668         char *acb_firm_model = acb->firm_model;
1669         char *acb_firm_version = acb->firm_version;
1670         char __iomem *iop_firm_model = (char __iomem *)(&reg->message_rwbuffer[15]);
1671         char __iomem *iop_firm_version = (char __iomem *)(&reg->message_rwbuffer[17]);
1672         int count;
1673
1674         writel(ARCMSR_INBOUND_MESG0_GET_CONFIG, &reg->inbound_msgaddr0);
1675         if (arcmsr_hba_wait_msgint_ready(acb)) {
1676                 printk(KERN_NOTICE "arcmsr%d: wait 'get adapter firmware \
1677                         miscellaneous data' timeout \n", acb->host->host_no);
1678         }
1679
1680         count = 8;
1681         while (count) {
1682                 *acb_firm_model = readb(iop_firm_model);
1683                 acb_firm_model++;
1684                 iop_firm_model++;
1685                 count--;
1686         }
1687
1688         count = 16;
1689         while (count) {
1690                 *acb_firm_version = readb(iop_firm_version);
1691                 acb_firm_version++;
1692                 iop_firm_version++;
1693                 count--;
1694         }
1695
1696         printk(KERN_INFO        "ARECA RAID ADAPTER%d: FIRMWARE VERSION %s \n"
1697                 , acb->host->host_no
1698                 , acb->firm_version);
1699
1700         acb->firm_request_len = readl(&reg->message_rwbuffer[1]);
1701         acb->firm_numbers_queue = readl(&reg->message_rwbuffer[2]);
1702         acb->firm_sdram_size = readl(&reg->message_rwbuffer[3]);
1703         acb->firm_hd_channels = readl(&reg->message_rwbuffer[4]);
1704 }
1705
1706 static void arcmsr_get_hbb_config(struct AdapterControlBlock *acb)
1707 {
1708         struct MessageUnit_B *reg = acb->pmuB;
1709         uint32_t __iomem *lrwbuffer = reg->msgcode_rwbuffer_reg;
1710         char *acb_firm_model = acb->firm_model;
1711         char *acb_firm_version = acb->firm_version;
1712         char __iomem *iop_firm_model = (char __iomem *)(&lrwbuffer[15]);
1713         /*firm_model,15,60-67*/
1714         char __iomem *iop_firm_version = (char __iomem *)(&lrwbuffer[17]);
1715         /*firm_version,17,68-83*/
1716         int count;
1717
1718         writel(ARCMSR_MESSAGE_GET_CONFIG, reg->drv2iop_doorbell_reg);
1719         if (arcmsr_hbb_wait_msgint_ready(acb)) {
1720                 printk(KERN_NOTICE "arcmsr%d: wait 'get adapter firmware \
1721                         miscellaneous data' timeout \n", acb->host->host_no);
1722         }
1723
1724         count = 8;
1725         while (count)
1726         {
1727                 *acb_firm_model = readb(iop_firm_model);
1728                 acb_firm_model++;
1729                 iop_firm_model++;
1730                 count--;
1731         }
1732
1733         count = 16;
1734         while (count)
1735         {
1736                 *acb_firm_version = readb(iop_firm_version);
1737                 acb_firm_version++;
1738                 iop_firm_version++;
1739                 count--;
1740         }
1741
1742         printk(KERN_INFO "ARECA RAID ADAPTER%d: FIRMWARE VERSION %s \n",
1743                         acb->host->host_no,
1744                         acb->firm_version);
1745
1746         lrwbuffer++;
1747         acb->firm_request_len = readl(lrwbuffer++);
1748         /*firm_request_len,1,04-07*/
1749         acb->firm_numbers_queue = readl(lrwbuffer++);
1750         /*firm_numbers_queue,2,08-11*/
1751         acb->firm_sdram_size = readl(lrwbuffer++);
1752         /*firm_sdram_size,3,12-15*/
1753         acb->firm_hd_channels = readl(lrwbuffer);
1754         /*firm_ide_channels,4,16-19*/
1755 }
1756
1757 static void arcmsr_get_firmware_spec(struct AdapterControlBlock *acb)
1758 {
1759         switch (acb->adapter_type) {
1760         case ACB_ADAPTER_TYPE_A: {
1761                 arcmsr_get_hba_config(acb);
1762                 }
1763                 break;
1764
1765         case ACB_ADAPTER_TYPE_B: {
1766                 arcmsr_get_hbb_config(acb);
1767                 }
1768                 break;
1769         }
1770 }
1771
1772 static void arcmsr_polling_hba_ccbdone(struct AdapterControlBlock *acb,
1773         struct CommandControlBlock *poll_ccb)
1774 {
1775         struct MessageUnit_A __iomem *reg = acb->pmuA;
1776         struct CommandControlBlock *ccb;
1777         uint32_t flag_ccb, outbound_intstatus, poll_ccb_done = 0, poll_count = 0;
1778
1779         polling_hba_ccb_retry:
1780         poll_count++;
1781         outbound_intstatus = readl(&reg->outbound_intstatus) & acb->outbound_int_enable;
1782         writel(outbound_intstatus, &reg->outbound_intstatus);/*clear interrupt*/
1783         while (1) {
1784                 if ((flag_ccb = readl(&reg->outbound_queueport)) == 0xFFFFFFFF) {
1785                         if (poll_ccb_done)
1786                                 break;
1787                         else {
1788                                 msleep(25);
1789                                 if (poll_count > 100)
1790                                         break;
1791                                 goto polling_hba_ccb_retry;
1792                         }
1793                 }
1794                 ccb = (struct CommandControlBlock *)(acb->vir2phy_offset + (flag_ccb << 5));
1795                 poll_ccb_done = (ccb == poll_ccb) ? 1:0;
1796                 if ((ccb->acb != acb) || (ccb->startdone != ARCMSR_CCB_START)) {
1797                         if ((ccb->startdone == ARCMSR_CCB_ABORTED) || (ccb == poll_ccb)) {
1798                                 printk(KERN_NOTICE "arcmsr%d: scsi id = %d lun = %d ccb = '0x%p'"
1799                                         " poll command abort successfully \n"
1800                                         , acb->host->host_no
1801                                         , ccb->pcmd->device->id
1802                                         , ccb->pcmd->device->lun
1803                                         , ccb);
1804                                 ccb->pcmd->result = DID_ABORT << 16;
1805                                 arcmsr_ccb_complete(ccb, 1);
1806                                 poll_ccb_done = 1;
1807                                 continue;
1808                         }
1809                         printk(KERN_NOTICE "arcmsr%d: polling get an illegal ccb"
1810                                 " command done ccb = '0x%p'"
1811                                 "ccboutstandingcount = %d \n"
1812                                 , acb->host->host_no
1813                                 , ccb
1814                                 , atomic_read(&acb->ccboutstandingcount));
1815                         continue;
1816                 }
1817                 arcmsr_report_ccb_state(acb, ccb, flag_ccb);
1818         }
1819 }
1820
1821 static void arcmsr_polling_hbb_ccbdone(struct AdapterControlBlock *acb, \
1822                                         struct CommandControlBlock *poll_ccb)
1823 {
1824                 struct MessageUnit_B *reg = acb->pmuB;
1825                 struct CommandControlBlock *ccb;
1826                 uint32_t flag_ccb, poll_ccb_done = 0, poll_count = 0;
1827                 int index;
1828
1829         polling_hbb_ccb_retry:
1830                 poll_count++;
1831                 /* clear doorbell interrupt */
1832                 writel(ARCMSR_DOORBELL_INT_CLEAR_PATTERN, reg->iop2drv_doorbell_reg);
1833                 while (1) {
1834                         index = reg->doneq_index;
1835                         if ((flag_ccb = readl(&reg->done_qbuffer[index])) == 0) {
1836                                 if (poll_ccb_done)
1837                                         break;
1838                                 else {
1839                                         msleep(25);
1840                                         if (poll_count > 100)
1841                                                 break;
1842                                         goto polling_hbb_ccb_retry;
1843                                 }
1844                         }
1845                         writel(0, &reg->done_qbuffer[index]);
1846                         index++;
1847                         /*if last index number set it to 0 */
1848                         index %= ARCMSR_MAX_HBB_POSTQUEUE;
1849                         reg->doneq_index = index;
1850                         /* check ifcommand done with no error*/
1851                         ccb = (struct CommandControlBlock *)\
1852       (acb->vir2phy_offset + (flag_ccb << 5));/*frame must be 32 bytes aligned*/
1853                         poll_ccb_done = (ccb == poll_ccb) ? 1:0;
1854                         if ((ccb->acb != acb) || (ccb->startdone != ARCMSR_CCB_START)) {
1855                                 if (ccb->startdone == ARCMSR_CCB_ABORTED) {
1856                                         printk(KERN_NOTICE "arcmsr%d: \
1857                 scsi id = %d lun = %d ccb = '0x%p' poll command abort successfully \n"
1858                                                 ,acb->host->host_no
1859                                                 ,ccb->pcmd->device->id
1860                                                 ,ccb->pcmd->device->lun
1861                                                 ,ccb);
1862                                         ccb->pcmd->result = DID_ABORT << 16;
1863                                         arcmsr_ccb_complete(ccb, 1);
1864                                         continue;
1865                                 }
1866                                 printk(KERN_NOTICE "arcmsr%d: polling get an illegal ccb"
1867                                         " command done ccb = '0x%p'"
1868                                         "ccboutstandingcount = %d \n"
1869                                         , acb->host->host_no
1870                                         , ccb
1871                                         , atomic_read(&acb->ccboutstandingcount));
1872                                 continue;
1873                         }
1874                         arcmsr_report_ccb_state(acb, ccb, flag_ccb);
1875                 }       /*drain reply FIFO*/
1876 }
1877
1878 static void arcmsr_polling_ccbdone(struct AdapterControlBlock *acb, \
1879                                         struct CommandControlBlock *poll_ccb)
1880 {
1881         switch (acb->adapter_type) {
1882
1883         case ACB_ADAPTER_TYPE_A: {
1884                 arcmsr_polling_hba_ccbdone(acb,poll_ccb);
1885                 }
1886                 break;
1887
1888         case ACB_ADAPTER_TYPE_B: {
1889                 arcmsr_polling_hbb_ccbdone(acb,poll_ccb);
1890                 }
1891         }
1892 }
1893
1894 static int arcmsr_iop_confirm(struct AdapterControlBlock *acb)
1895 {
1896         uint32_t cdb_phyaddr, ccb_phyaddr_hi32;
1897         dma_addr_t dma_coherent_handle;
1898         /*
1899         ********************************************************************
1900         ** here we need to tell iop 331 our freeccb.HighPart
1901         ** if freeccb.HighPart is not zero
1902         ********************************************************************
1903         */
1904         dma_coherent_handle = acb->dma_coherent_handle;
1905         cdb_phyaddr = (uint32_t)(dma_coherent_handle);
1906         ccb_phyaddr_hi32 = (uint32_t)((cdb_phyaddr >> 16) >> 16);
1907         /*
1908         ***********************************************************************
1909         **    if adapter type B, set window of "post command Q"
1910         ***********************************************************************
1911         */
1912         switch (acb->adapter_type) {
1913
1914         case ACB_ADAPTER_TYPE_A: {
1915                 if (ccb_phyaddr_hi32 != 0) {
1916                         struct MessageUnit_A __iomem *reg = acb->pmuA;
1917                         uint32_t intmask_org;
1918                         intmask_org = arcmsr_disable_outbound_ints(acb);
1919                         writel(ARCMSR_SIGNATURE_SET_CONFIG, \
1920                                                 &reg->message_rwbuffer[0]);
1921                         writel(ccb_phyaddr_hi32, &reg->message_rwbuffer[1]);
1922                         writel(ARCMSR_INBOUND_MESG0_SET_CONFIG, \
1923                                                         &reg->inbound_msgaddr0);
1924                         if (arcmsr_hba_wait_msgint_ready(acb)) {
1925                                 printk(KERN_NOTICE "arcmsr%d: ""set ccb high \
1926                                 part physical address timeout\n",
1927                                 acb->host->host_no);
1928                                 return 1;
1929                         }
1930                         arcmsr_enable_outbound_ints(acb, intmask_org);
1931                 }
1932                 }
1933                 break;
1934
1935         case ACB_ADAPTER_TYPE_B: {
1936                 unsigned long post_queue_phyaddr;
1937                 uint32_t __iomem *rwbuffer;
1938
1939                 struct MessageUnit_B *reg = acb->pmuB;
1940                 uint32_t intmask_org;
1941                 intmask_org = arcmsr_disable_outbound_ints(acb);
1942                 reg->postq_index = 0;
1943                 reg->doneq_index = 0;
1944                 writel(ARCMSR_MESSAGE_SET_POST_WINDOW, reg->drv2iop_doorbell_reg);
1945                 if (arcmsr_hbb_wait_msgint_ready(acb)) {
1946                         printk(KERN_NOTICE "arcmsr%d:can not set diver mode\n", \
1947                                 acb->host->host_no);
1948                         return 1;
1949                 }
1950                 post_queue_phyaddr = cdb_phyaddr + ARCMSR_MAX_FREECCB_NUM * \
1951                 sizeof(struct CommandControlBlock) + offsetof(struct MessageUnit_B, post_qbuffer) ;
1952                 rwbuffer = reg->msgcode_rwbuffer_reg;
1953                 /* driver "set config" signature */
1954                 writel(ARCMSR_SIGNATURE_SET_CONFIG, rwbuffer++);
1955                 /* normal should be zero */
1956                 writel(ccb_phyaddr_hi32, rwbuffer++);
1957                 /* postQ size (256 + 8)*4        */
1958                 writel(post_queue_phyaddr, rwbuffer++);
1959                 /* doneQ size (256 + 8)*4        */
1960                 writel(post_queue_phyaddr + 1056, rwbuffer++);
1961                 /* ccb maxQ size must be --> [(256 + 8)*4]*/
1962                 writel(1056, rwbuffer);
1963
1964                 writel(ARCMSR_MESSAGE_SET_CONFIG, reg->drv2iop_doorbell_reg);
1965                 if (arcmsr_hbb_wait_msgint_ready(acb)) {
1966                         printk(KERN_NOTICE "arcmsr%d: 'set command Q window' \
1967                         timeout \n",acb->host->host_no);
1968                         return 1;
1969                 }
1970
1971                 writel(ARCMSR_MESSAGE_START_DRIVER_MODE, reg->drv2iop_doorbell_reg);
1972                 if (arcmsr_hbb_wait_msgint_ready(acb)) {
1973                         printk(KERN_NOTICE "arcmsr%d: 'can not set diver mode \n"\
1974                         ,acb->host->host_no);
1975                         return 1;
1976                 }
1977                 arcmsr_enable_outbound_ints(acb, intmask_org);
1978                 }
1979                 break;
1980         }
1981         return 0;
1982 }
1983
1984 static void arcmsr_wait_firmware_ready(struct AdapterControlBlock *acb)
1985 {
1986         uint32_t firmware_state = 0;
1987
1988         switch (acb->adapter_type) {
1989
1990         case ACB_ADAPTER_TYPE_A: {
1991                 struct MessageUnit_A __iomem *reg = acb->pmuA;
1992                 do {
1993                         firmware_state = readl(&reg->outbound_msgaddr1);
1994                 } while ((firmware_state & ARCMSR_OUTBOUND_MESG1_FIRMWARE_OK) == 0);
1995                 }
1996                 break;
1997
1998         case ACB_ADAPTER_TYPE_B: {
1999                 struct MessageUnit_B *reg = acb->pmuB;
2000                 do {
2001                         firmware_state = readl(reg->iop2drv_doorbell_reg);
2002                 } while ((firmware_state & ARCMSR_MESSAGE_FIRMWARE_OK) == 0);
2003                 }
2004                 break;
2005         }
2006 }
2007
2008 static void arcmsr_start_hba_bgrb(struct AdapterControlBlock *acb)
2009 {
2010         struct MessageUnit_A __iomem *reg = acb->pmuA;
2011         acb->acb_flags |= ACB_F_MSG_START_BGRB;
2012         writel(ARCMSR_INBOUND_MESG0_START_BGRB, &reg->inbound_msgaddr0);
2013         if (arcmsr_hba_wait_msgint_ready(acb)) {
2014                 printk(KERN_NOTICE "arcmsr%d: wait 'start adapter background \
2015                                 rebulid' timeout \n", acb->host->host_no);
2016         }
2017 }
2018
2019 static void arcmsr_start_hbb_bgrb(struct AdapterControlBlock *acb)
2020 {
2021         struct MessageUnit_B *reg = acb->pmuB;
2022         acb->acb_flags |= ACB_F_MSG_START_BGRB;
2023         writel(ARCMSR_MESSAGE_START_BGRB, reg->drv2iop_doorbell_reg);
2024         if (arcmsr_hbb_wait_msgint_ready(acb)) {
2025                 printk(KERN_NOTICE "arcmsr%d: wait 'start adapter background \
2026                                 rebulid' timeout \n",acb->host->host_no);
2027         }
2028 }
2029
2030 static void arcmsr_start_adapter_bgrb(struct AdapterControlBlock *acb)
2031 {
2032         switch (acb->adapter_type) {
2033         case ACB_ADAPTER_TYPE_A:
2034                 arcmsr_start_hba_bgrb(acb);
2035                 break;
2036         case ACB_ADAPTER_TYPE_B:
2037                 arcmsr_start_hbb_bgrb(acb);
2038                 break;
2039         }
2040 }
2041
2042 static void arcmsr_clear_doorbell_queue_buffer(struct AdapterControlBlock *acb)
2043 {
2044         switch (acb->adapter_type) {
2045         case ACB_ADAPTER_TYPE_A: {
2046                 struct MessageUnit_A __iomem *reg = acb->pmuA;
2047                 uint32_t outbound_doorbell;
2048                 /* empty doorbell Qbuffer if door bell ringed */
2049                 outbound_doorbell = readl(&reg->outbound_doorbell);
2050                 /*clear doorbell interrupt */
2051                 writel(outbound_doorbell, &reg->outbound_doorbell);
2052                 writel(ARCMSR_INBOUND_DRIVER_DATA_READ_OK, &reg->inbound_doorbell);
2053                 }
2054                 break;
2055
2056         case ACB_ADAPTER_TYPE_B: {
2057                 struct MessageUnit_B *reg = acb->pmuB;
2058                 /*clear interrupt and message state*/
2059                 writel(ARCMSR_MESSAGE_INT_CLEAR_PATTERN, reg->iop2drv_doorbell_reg);
2060                 writel(ARCMSR_DRV2IOP_DATA_READ_OK, reg->drv2iop_doorbell_reg);
2061                 /* let IOP know data has been read */
2062                 }
2063                 break;
2064         }
2065 }
2066
2067 static void arcmsr_iop_init(struct AdapterControlBlock *acb)
2068 {
2069         uint32_t intmask_org;
2070
2071         arcmsr_wait_firmware_ready(acb);
2072         arcmsr_iop_confirm(acb);
2073        /* disable all outbound interrupt */
2074        intmask_org = arcmsr_disable_outbound_ints(acb);
2075         arcmsr_get_firmware_spec(acb);
2076         /*start background rebuild*/
2077         arcmsr_start_adapter_bgrb(acb);
2078         /* empty doorbell Qbuffer if door bell ringed */
2079         arcmsr_clear_doorbell_queue_buffer(acb);
2080         /* enable outbound Post Queue,outbound doorbell Interrupt */
2081         arcmsr_enable_outbound_ints(acb, intmask_org);
2082         acb->acb_flags |= ACB_F_IOP_INITED;
2083 }
2084
2085 static void arcmsr_iop_reset(struct AdapterControlBlock *acb)
2086 {
2087         struct CommandControlBlock *ccb;
2088         uint32_t intmask_org;
2089         int i = 0;
2090
2091         if (atomic_read(&acb->ccboutstandingcount) != 0) {
2092                 /* talk to iop 331 outstanding command aborted */
2093                 arcmsr_abort_allcmd(acb);
2094
2095                 /* wait for 3 sec for all command aborted*/
2096                 ssleep(3);
2097
2098                 /* disable all outbound interrupt */
2099                 intmask_org = arcmsr_disable_outbound_ints(acb);
2100                 /* clear all outbound posted Q */
2101                 arcmsr_done4abort_postqueue(acb);
2102                 for (i = 0; i < ARCMSR_MAX_FREECCB_NUM; i++) {
2103                         ccb = acb->pccb_pool[i];
2104                         if (ccb->startdone == ARCMSR_CCB_START) {
2105                                 ccb->startdone = ARCMSR_CCB_ABORTED;
2106                                 arcmsr_ccb_complete(ccb, 1);
2107                         }
2108                 }
2109                 /* enable all outbound interrupt */
2110                 arcmsr_enable_outbound_ints(acb, intmask_org);
2111         }
2112 }
2113
2114 static int arcmsr_bus_reset(struct scsi_cmnd *cmd)
2115 {
2116         struct AdapterControlBlock *acb =
2117                 (struct AdapterControlBlock *)cmd->device->host->hostdata;
2118         int i;
2119
2120         acb->num_resets++;
2121         acb->acb_flags |= ACB_F_BUS_RESET;
2122         for (i = 0; i < 400; i++) {
2123                 if (!atomic_read(&acb->ccboutstandingcount))
2124                         break;
2125                 arcmsr_interrupt(acb);/* FIXME: need spinlock */
2126                 msleep(25);
2127         }
2128         arcmsr_iop_reset(acb);
2129         acb->acb_flags &= ~ACB_F_BUS_RESET;
2130         return SUCCESS;
2131 }
2132
2133 static void arcmsr_abort_one_cmd(struct AdapterControlBlock *acb,
2134                 struct CommandControlBlock *ccb)
2135 {
2136         u32 intmask;
2137
2138         ccb->startdone = ARCMSR_CCB_ABORTED;
2139
2140         /*
2141         ** Wait for 3 sec for all command done.
2142         */
2143         ssleep(3);
2144
2145         intmask = arcmsr_disable_outbound_ints(acb);
2146         arcmsr_polling_ccbdone(acb, ccb);
2147         arcmsr_enable_outbound_ints(acb, intmask);
2148 }
2149
2150 static int arcmsr_abort(struct scsi_cmnd *cmd)
2151 {
2152         struct AdapterControlBlock *acb =
2153                 (struct AdapterControlBlock *)cmd->device->host->hostdata;
2154         int i = 0;
2155
2156         printk(KERN_NOTICE
2157                 "arcmsr%d: abort device command of scsi id = %d lun = %d \n",
2158                 acb->host->host_no, cmd->device->id, cmd->device->lun);
2159         acb->num_aborts++;
2160         /*
2161         ************************************************
2162         ** the all interrupt service routine is locked
2163         ** we need to handle it as soon as possible and exit
2164         ************************************************
2165         */
2166         if (!atomic_read(&acb->ccboutstandingcount))
2167                 return SUCCESS;
2168
2169         for (i = 0; i < ARCMSR_MAX_FREECCB_NUM; i++) {
2170                 struct CommandControlBlock *ccb = acb->pccb_pool[i];
2171                 if (ccb->startdone == ARCMSR_CCB_START && ccb->pcmd == cmd) {
2172                         arcmsr_abort_one_cmd(acb, ccb);
2173                         break;
2174                 }
2175         }
2176
2177         return SUCCESS;
2178 }
2179
2180 static const char *arcmsr_info(struct Scsi_Host *host)
2181 {
2182         struct AdapterControlBlock *acb =
2183                 (struct AdapterControlBlock *) host->hostdata;
2184         static char buf[256];
2185         char *type;
2186         int raid6 = 1;
2187
2188         switch (acb->pdev->device) {
2189         case PCI_DEVICE_ID_ARECA_1110:
2190         case PCI_DEVICE_ID_ARECA_1200:
2191         case PCI_DEVICE_ID_ARECA_1202:
2192         case PCI_DEVICE_ID_ARECA_1210:
2193                 raid6 = 0;
2194                 /*FALLTHRU*/
2195         case PCI_DEVICE_ID_ARECA_1120:
2196         case PCI_DEVICE_ID_ARECA_1130:
2197         case PCI_DEVICE_ID_ARECA_1160:
2198         case PCI_DEVICE_ID_ARECA_1170:
2199         case PCI_DEVICE_ID_ARECA_1201:
2200         case PCI_DEVICE_ID_ARECA_1220:
2201         case PCI_DEVICE_ID_ARECA_1230:
2202         case PCI_DEVICE_ID_ARECA_1260:
2203         case PCI_DEVICE_ID_ARECA_1270:
2204         case PCI_DEVICE_ID_ARECA_1280:
2205                 type = "SATA";
2206                 break;
2207         case PCI_DEVICE_ID_ARECA_1380:
2208         case PCI_DEVICE_ID_ARECA_1381:
2209         case PCI_DEVICE_ID_ARECA_1680:
2210         case PCI_DEVICE_ID_ARECA_1681:
2211                 type = "SAS";
2212                 break;
2213         default:
2214                 type = "X-TYPE";
2215                 break;
2216         }
2217         sprintf(buf, "Areca %s Host Adapter RAID Controller%s\n %s",
2218                         type, raid6 ? "( RAID6 capable)" : "",
2219                         ARCMSR_DRIVER_VERSION);
2220         return buf;
2221 }
2222 #ifdef CONFIG_SCSI_ARCMSR_AER
2223 static pci_ers_result_t arcmsr_pci_slot_reset(struct pci_dev *pdev)
2224 {
2225         struct Scsi_Host *host = pci_get_drvdata(pdev);
2226         struct AdapterControlBlock *acb =
2227                 (struct AdapterControlBlock *) host->hostdata;
2228         uint32_t intmask_org;
2229         int i, j;
2230
2231         if (pci_enable_device(pdev)) {
2232                 return PCI_ERS_RESULT_DISCONNECT;
2233         }
2234         pci_set_master(pdev);
2235         intmask_org = arcmsr_disable_outbound_ints(acb);
2236         acb->acb_flags |= (ACB_F_MESSAGE_WQBUFFER_CLEARED |
2237                            ACB_F_MESSAGE_RQBUFFER_CLEARED |
2238                            ACB_F_MESSAGE_WQBUFFER_READED);
2239         acb->acb_flags &= ~ACB_F_SCSISTOPADAPTER;
2240         for (i = 0; i < ARCMSR_MAX_TARGETID; i++)
2241                 for (j = 0; j < ARCMSR_MAX_TARGETLUN; j++)
2242                         acb->devstate[i][j] = ARECA_RAID_GONE;
2243
2244         arcmsr_wait_firmware_ready(acb);
2245         arcmsr_iop_confirm(acb);
2246        /* disable all outbound interrupt */
2247         arcmsr_get_firmware_spec(acb);
2248         /*start background rebuild*/
2249         arcmsr_start_adapter_bgrb(acb);
2250         /* empty doorbell Qbuffer if door bell ringed */
2251         arcmsr_clear_doorbell_queue_buffer(acb);
2252         /* enable outbound Post Queue,outbound doorbell Interrupt */
2253         arcmsr_enable_outbound_ints(acb, intmask_org);
2254         acb->acb_flags |= ACB_F_IOP_INITED;
2255
2256         pci_enable_pcie_error_reporting(pdev);
2257         return PCI_ERS_RESULT_RECOVERED;
2258 }
2259
2260 static void arcmsr_pci_ers_need_reset_forepart(struct pci_dev *pdev)
2261 {
2262         struct Scsi_Host *host = pci_get_drvdata(pdev);
2263         struct AdapterControlBlock *acb = (struct AdapterControlBlock *)host->hostdata;
2264         struct CommandControlBlock *ccb;
2265         uint32_t intmask_org;
2266         int i = 0;
2267
2268         if (atomic_read(&acb->ccboutstandingcount) != 0) {
2269                 /* talk to iop 331 outstanding command aborted */
2270                 arcmsr_abort_allcmd(acb);
2271                 /* wait for 3 sec for all command aborted*/
2272                 ssleep(3);
2273                 /* disable all outbound interrupt */
2274                 intmask_org = arcmsr_disable_outbound_ints(acb);
2275                 /* clear all outbound posted Q */
2276                 arcmsr_done4abort_postqueue(acb);
2277                 for (i = 0; i < ARCMSR_MAX_FREECCB_NUM; i++) {
2278                         ccb = acb->pccb_pool[i];
2279                         if (ccb->startdone == ARCMSR_CCB_START) {
2280                                 ccb->startdone = ARCMSR_CCB_ABORTED;
2281                                 arcmsr_ccb_complete(ccb, 1);
2282                         }
2283                 }
2284                 /* enable all outbound interrupt */
2285                 arcmsr_enable_outbound_ints(acb, intmask_org);
2286         }
2287         pci_disable_device(pdev);
2288 }
2289
2290 static void arcmsr_pci_ers_disconnect_forepart(struct pci_dev *pdev)
2291 {
2292                         struct Scsi_Host *host = pci_get_drvdata(pdev);
2293                         struct AdapterControlBlock *acb = \
2294                                 (struct AdapterControlBlock *)host->hostdata;
2295
2296                         arcmsr_stop_adapter_bgrb(acb);
2297                         arcmsr_flush_adapter_cache(acb);
2298 }
2299
2300 static pci_ers_result_t arcmsr_pci_error_detected(struct pci_dev *pdev,
2301                                                 pci_channel_state_t state)
2302 {
2303         switch (state) {
2304         case pci_channel_io_frozen:
2305                         arcmsr_pci_ers_need_reset_forepart(pdev);
2306                         return PCI_ERS_RESULT_NEED_RESET;
2307         case pci_channel_io_perm_failure:
2308                         arcmsr_pci_ers_disconnect_forepart(pdev);
2309                         return PCI_ERS_RESULT_DISCONNECT;
2310                         break;
2311         default:
2312                         return PCI_ERS_RESULT_NEED_RESET;
2313           }
2314 }
2315 #endif