git.oblomov.eu Git - linux-2.6/blob - 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         .shost_attrs            = arcmsr_host_attrs,
 126 };
 127 #ifdef CONFIG_SCSI_ARCMSR_AER
 128 static struct pci_error_handlers arcmsr_pci_error_handlers = {
 129         .error_detected         = arcmsr_pci_error_detected,
 130         .slot_reset             = arcmsr_pci_slot_reset,
 131 };
 132 #endif
 133 static struct pci_device_id arcmsr_device_id_table[] = {
 134         {PCI_DEVICE(PCI_VENDOR_ID_ARECA, PCI_DEVICE_ID_ARECA_1110)},
 135         {PCI_DEVICE(PCI_VENDOR_ID_ARECA, PCI_DEVICE_ID_ARECA_1120)},
 136         {PCI_DEVICE(PCI_VENDOR_ID_ARECA, PCI_DEVICE_ID_ARECA_1130)},
 137         {PCI_DEVICE(PCI_VENDOR_ID_ARECA, PCI_DEVICE_ID_ARECA_1160)},
 138         {PCI_DEVICE(PCI_VENDOR_ID_ARECA, PCI_DEVICE_ID_ARECA_1170)},
 139         {PCI_DEVICE(PCI_VENDOR_ID_ARECA, PCI_DEVICE_ID_ARECA_1200)},
 140         {PCI_DEVICE(PCI_VENDOR_ID_ARECA, PCI_DEVICE_ID_ARECA_1201)},
 141         {PCI_DEVICE(PCI_VENDOR_ID_ARECA, PCI_DEVICE_ID_ARECA_1202)},
 142         {PCI_DEVICE(PCI_VENDOR_ID_ARECA, PCI_DEVICE_ID_ARECA_1210)},
 143         {PCI_DEVICE(PCI_VENDOR_ID_ARECA, PCI_DEVICE_ID_ARECA_1220)},
 144         {PCI_DEVICE(PCI_VENDOR_ID_ARECA, PCI_DEVICE_ID_ARECA_1230)},
 145         {PCI_DEVICE(PCI_VENDOR_ID_ARECA, PCI_DEVICE_ID_ARECA_1260)},
 146         {PCI_DEVICE(PCI_VENDOR_ID_ARECA, PCI_DEVICE_ID_ARECA_1270)},
 147         {PCI_DEVICE(PCI_VENDOR_ID_ARECA, PCI_DEVICE_ID_ARECA_1280)},
 148         {PCI_DEVICE(PCI_VENDOR_ID_ARECA, PCI_DEVICE_ID_ARECA_1380)},
 149         {PCI_DEVICE(PCI_VENDOR_ID_ARECA, PCI_DEVICE_ID_ARECA_1381)},
 150         {PCI_DEVICE(PCI_VENDOR_ID_ARECA, PCI_DEVICE_ID_ARECA_1680)},
 151         {PCI_DEVICE(PCI_VENDOR_ID_ARECA, PCI_DEVICE_ID_ARECA_1681)},
 152         {0, 0}, /* Terminating entry */
 153 };
 154 MODULE_DEVICE_TABLE(pci, arcmsr_device_id_table);
 155 static struct pci_driver arcmsr_pci_driver = {
 156         .name                   = "arcmsr",
 157         .id_table               = arcmsr_device_id_table,
 158         .probe                  = arcmsr_probe,
 159         .remove                 = arcmsr_remove,
 160         .shutdown               = arcmsr_shutdown,
 161         #ifdef CONFIG_SCSI_ARCMSR_AER
 162         .err_handler            = &arcmsr_pci_error_handlers,
 163         #endif
 164 };
 165
 166 static irqreturn_t arcmsr_do_interrupt(int irq, void *dev_id)
 167 {
 168         irqreturn_t handle_state;
 169         struct AdapterControlBlock *acb = dev_id;
 170
 171         spin_lock(acb->host->host_lock);
 172         handle_state = arcmsr_interrupt(acb);
 173         spin_unlock(acb->host->host_lock);
 174
 175         return handle_state;
 176 }
 177
 178 static int arcmsr_bios_param(struct scsi_device *sdev,
 179                 struct block_device *bdev, sector_t capacity, int *geom)
 180 {
 181         int ret, heads, sectors, cylinders, total_capacity;
 182         unsigned char *buffer;/* return copy of block device's partition table */
 183
 184         buffer = scsi_bios_ptable(bdev);
 185         if (buffer) {
 186                 ret = scsi_partsize(buffer, capacity, &geom[2], &geom[0], &geom[1]);
 187                 kfree(buffer);
 188                 if (ret != -1)
 189                         return ret;
 190         }
 191         total_capacity = capacity;
 192         heads = 64;
 193         sectors = 32;
 194         cylinders = total_capacity / (heads * sectors);
 195         if (cylinders > 1024) {
 196                 heads = 255;
 197                 sectors = 63;
 198                 cylinders = total_capacity / (heads * sectors);
 199         }
 200         geom[0] = heads;
 201         geom[1] = sectors;
 202         geom[2] = cylinders;
 203         return 0;
 204 }
 205
 206 static void arcmsr_define_adapter_type(struct AdapterControlBlock *acb)
 207 {
 208         struct pci_dev *pdev = acb->pdev;
 209         u16 dev_id;
 210         pci_read_config_word(pdev, PCI_DEVICE_ID, &dev_id);
 211         switch (dev_id) {
 212         case 0x1201 : {
 213                 acb->adapter_type = ACB_ADAPTER_TYPE_B;
 214                 }
 215                 break;
 216
 217         default : acb->adapter_type = ACB_ADAPTER_TYPE_A;
 218         }
 219 }
 220
 221 static int arcmsr_alloc_ccb_pool(struct AdapterControlBlock *acb)
 222 {
 223
 224         switch (acb->adapter_type) {
 225
 226         case ACB_ADAPTER_TYPE_A: {
 227                 struct pci_dev *pdev = acb->pdev;
 228                 void *dma_coherent;
 229                 dma_addr_t dma_coherent_handle, dma_addr;
 230                 struct CommandControlBlock *ccb_tmp;
 231                 uint32_t intmask_org;
 232                 int i, j;
 233
 234                 acb->pmu = ioremap(pci_resource_start(pdev, 0), pci_resource_len(pdev, 0));
 235                 if (!acb->pmu) {
 236                         printk(KERN_NOTICE "arcmsr%d: memory mapping region fail \n",
 237                                                         acb->host->host_no);
 238                 }
 239
 240                 dma_coherent = dma_alloc_coherent(&pdev->dev,
 241                         ARCMSR_MAX_FREECCB_NUM *
 242                         sizeof (struct CommandControlBlock) + 0x20,
 243                         &dma_coherent_handle, GFP_KERNEL);
 244                 if (!dma_coherent)
 245                         return -ENOMEM;
 246
 247                 acb->dma_coherent = dma_coherent;
 248                 acb->dma_coherent_handle = dma_coherent_handle;
 249
 250                 if (((unsigned long)dma_coherent & 0x1F)) {
 251                         dma_coherent = dma_coherent +
 252                                 (0x20 - ((unsigned long)dma_coherent & 0x1F));
 253                         dma_coherent_handle = dma_coherent_handle +
 254                                 (0x20 - ((unsigned long)dma_coherent_handle & 0x1F));
 255                 }
 256
 257                 dma_addr = dma_coherent_handle;
 258                 ccb_tmp = (struct CommandControlBlock *)dma_coherent;
 259                 for (i = 0; i < ARCMSR_MAX_FREECCB_NUM; i++) {
 260                         ccb_tmp->cdb_shifted_phyaddr = dma_addr >> 5;
 261                         ccb_tmp->acb = acb;
 262                         acb->pccb_pool[i] = ccb_tmp;
 263                         list_add_tail(&ccb_tmp->list, &acb->ccb_free_list);
 264                         dma_addr = dma_addr + sizeof(struct CommandControlBlock);
 265                         ccb_tmp++;
 266                 }
 267
 268                 acb->vir2phy_offset = (unsigned long)ccb_tmp -(unsigned long)dma_addr;
 269                 for (i = 0; i < ARCMSR_MAX_TARGETID; i++)
 270                         for (j = 0; j < ARCMSR_MAX_TARGETLUN; j++)
 271                                 acb->devstate[i][j] = ARECA_RAID_GONE;
 272
 273                 /*
 274                 ** here we need to tell iop 331 our ccb_tmp.HighPart
 275                 ** if ccb_tmp.HighPart is not zero
 276                 */
 277                 intmask_org = arcmsr_disable_outbound_ints(acb);
 278                 }
 279                 break;
 280
 281         case ACB_ADAPTER_TYPE_B: {
 282
 283                 struct pci_dev *pdev = acb->pdev;
 284                 struct MessageUnit_B *reg;
 285                 void *mem_base0, *mem_base1;
 286                 void *dma_coherent;
 287                 dma_addr_t dma_coherent_handle, dma_addr;
 288                 uint32_t intmask_org;
 289                 struct CommandControlBlock *ccb_tmp;
 290                 int i, j;
 291
 292                 dma_coherent = dma_alloc_coherent(&pdev->dev,
 293                         ((ARCMSR_MAX_FREECCB_NUM *
 294                         sizeof(struct CommandControlBlock) + 0x20) +
 295                         sizeof(struct MessageUnit_B)),
 296                         &dma_coherent_handle, GFP_KERNEL);
 297                 if (!dma_coherent)
 298                         return -ENOMEM;
 299
 300                 acb->dma_coherent = dma_coherent;
 301                 acb->dma_coherent_handle = dma_coherent_handle;
 302
 303                 if (((unsigned long)dma_coherent & 0x1F)) {
 304                         dma_coherent = dma_coherent +
 305                                 (0x20 - ((unsigned long)dma_coherent & 0x1F));
 306                         dma_coherent_handle = dma_coherent_handle +
 307                                 (0x20 - ((unsigned long)dma_coherent_handle & 0x1F));
 308                 }
 309
 310                 reg = (struct MessageUnit_B *)(dma_coherent +
 311                 ARCMSR_MAX_FREECCB_NUM * sizeof(struct CommandControlBlock));
 312
 313                 dma_addr = dma_coherent_handle;
 314                 ccb_tmp = (struct CommandControlBlock *)dma_coherent;
 315                 for (i = 0; i < ARCMSR_MAX_FREECCB_NUM; i++) {
 316                         ccb_tmp->cdb_shifted_phyaddr = dma_addr >> 5;
 317                         ccb_tmp->acb = acb;
 318                         acb->pccb_pool[i] = ccb_tmp;
 319                         list_add_tail(&ccb_tmp->list, &acb->ccb_free_list);
 320                         dma_addr = dma_addr + sizeof(struct CommandControlBlock);
 321                         ccb_tmp++;
 322                 }
 323
 324                 reg = (struct MessageUnit_B *)(dma_coherent +
 325                 ARCMSR_MAX_FREECCB_NUM * sizeof(struct CommandControlBlock));
 326                 acb->pmu = (struct MessageUnit *)reg;
 327                 mem_base0 = ioremap(pci_resource_start(pdev, 0),
 328                                         pci_resource_len(pdev, 0));
 329                 mem_base1 = ioremap(pci_resource_start(pdev, 2),
 330                                         pci_resource_len(pdev, 2));
 331                 reg->drv2iop_doorbell_reg = (uint32_t *)((char *)mem_base0 +
 332                                                 ARCMSR_DRV2IOP_DOORBELL);
 333                 reg->drv2iop_doorbell_mask_reg = (uint32_t *)((char *)mem_base0 +
 334                                                 ARCMSR_DRV2IOP_DOORBELL_MASK);
 335                 reg->iop2drv_doorbell_reg = (uint32_t *)((char *)mem_base0 +
 336                                                         ARCMSR_IOP2DRV_DOORBELL);
 337                 reg->iop2drv_doorbell_mask_reg = (uint32_t *)((char *)mem_base0 +
 338                                                 ARCMSR_IOP2DRV_DOORBELL_MASK);
 339                 reg->ioctl_wbuffer_reg = (uint32_t *)((char *)mem_base1 +
 340                                                         ARCMSR_IOCTL_WBUFFER);
 341                 reg->ioctl_rbuffer_reg = (uint32_t *)((char *)mem_base1 +
 342                                                         ARCMSR_IOCTL_RBUFFER);
 343                 reg->msgcode_rwbuffer_reg = (uint32_t *)((char *)mem_base1 +
 344                                                         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 = (struct MessageUnit_A *)acb->pmu;
 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 = (struct MessageUnit_B *)acb->pmu;
 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 = (struct MessageUnit_A *)acb->pmu;
 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 = (struct MessageUnit_B *)acb->pmu;
 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 = (struct MessageUnit_A *)acb->pmu;
 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 = (struct MessageUnit_B *)acb->pmu;
 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 = (struct MessageUnit_A *)acb->pmu;
 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 = (struct MessageUnit_B *)acb->pmu;
 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 = \
 747                         (struct MessageUnit_A *)acb->pmu;
 748                 uint32_t outbound_intstatus;
 749                 outbound_intstatus = readl(&reg->outbound_intstatus) & \
 750                                         acb->outbound_int_enable;
 751                 /*clear and abort all outbound posted Q*/
 752                 writel(outbound_intstatus, &reg->outbound_intstatus);/*clear interrupt*/
 753                 while (((flag_ccb = readl(&reg->outbound_queueport)) != 0xFFFFFFFF) \
 754                                 && (i++ < ARCMSR_MAX_OUTSTANDING_CMD)) {
 755                         arcmsr_drain_donequeue(acb, flag_ccb);
 756                 }
 757                 }
 758                 break;
 759
 760         case ACB_ADAPTER_TYPE_B: {
 761                 struct MessageUnit_B *reg = (struct MessageUnit_B *)acb->pmu;
 762                 /*clear all outbound posted Q*/
 763                 for (i = 0; i < ARCMSR_MAX_HBB_POSTQUEUE; i++) {
 764                         if ((flag_ccb = readl(&reg->done_qbuffer[i])) != 0) {
 765                                 writel(0, &reg->done_qbuffer[i]);
 766                                 arcmsr_drain_donequeue(acb, flag_ccb);
 767                         }
 768                         writel(0, &reg->post_qbuffer[i]);
 769                 }
 770                 reg->doneq_index = 0;
 771                 reg->postq_index = 0;
 772                 }
 773                 break;
 774         }
 775 }
 776 static void arcmsr_remove(struct pci_dev *pdev)
 777 {
 778         struct Scsi_Host *host = pci_get_drvdata(pdev);
 779         struct AdapterControlBlock *acb =
 780                 (struct AdapterControlBlock *) host->hostdata;
 781         int poll_count = 0;
 782
 783         arcmsr_free_sysfs_attr(acb);
 784         scsi_remove_host(host);
 785         arcmsr_stop_adapter_bgrb(acb);
 786         arcmsr_flush_adapter_cache(acb);
 787         arcmsr_disable_outbound_ints(acb);
 788         acb->acb_flags |= ACB_F_SCSISTOPADAPTER;
 789         acb->acb_flags &= ~ACB_F_IOP_INITED;
 790
 791         for (poll_count = 0; poll_count < ARCMSR_MAX_OUTSTANDING_CMD; poll_count++) {
 792                 if (!atomic_read(&acb->ccboutstandingcount))
 793                         break;
 794                 arcmsr_interrupt(acb);/* FIXME: need spinlock */
 795                 msleep(25);
 796         }
 797
 798         if (atomic_read(&acb->ccboutstandingcount)) {
 799                 int i;
 800
 801                 arcmsr_abort_allcmd(acb);
 802                 arcmsr_done4abort_postqueue(acb);
 803                 for (i = 0; i < ARCMSR_MAX_FREECCB_NUM; i++) {
 804                         struct CommandControlBlock *ccb = acb->pccb_pool[i];
 805                         if (ccb->startdone == ARCMSR_CCB_START) {
 806                                 ccb->startdone = ARCMSR_CCB_ABORTED;
 807                                 ccb->pcmd->result = DID_ABORT << 16;
 808                                 arcmsr_ccb_complete(ccb, 1);
 809                         }
 810                 }
 811         }
 812
 813         free_irq(pdev->irq, acb);
 814         iounmap(acb->pmu);
 815         arcmsr_free_ccb_pool(acb);
 816         pci_release_regions(pdev);
 817
 818         scsi_host_put(host);
 819
 820         pci_disable_device(pdev);
 821         pci_set_drvdata(pdev, NULL);
 822 }
 823
 824 static void arcmsr_shutdown(struct pci_dev *pdev)
 825 {
 826         struct Scsi_Host *host = pci_get_drvdata(pdev);
 827         struct AdapterControlBlock *acb =
 828                 (struct AdapterControlBlock *)host->hostdata;
 829
 830         arcmsr_stop_adapter_bgrb(acb);
 831         arcmsr_flush_adapter_cache(acb);
 832 }
 833
 834 static int arcmsr_module_init(void)
 835 {
 836         int error = 0;
 837
 838         error = pci_register_driver(&arcmsr_pci_driver);
 839         return error;
 840 }
 841
 842 static void arcmsr_module_exit(void)
 843 {
 844         pci_unregister_driver(&arcmsr_pci_driver);
 845 }
 846 module_init(arcmsr_module_init);
 847 module_exit(arcmsr_module_exit);
 848
 849 static void arcmsr_enable_outbound_ints(struct AdapterControlBlock *acb, \
 850                                                 u32 intmask_org)
 851 {
 852         u32 mask;
 853
 854         switch (acb->adapter_type) {
 855
 856         case ACB_ADAPTER_TYPE_A : {
 857                 struct MessageUnit_A __iomem *reg = (struct MessageUnit_A *)acb->pmu;
 858                 mask = intmask_org & ~(ARCMSR_MU_OUTBOUND_POSTQUEUE_INTMASKENABLE |
 859                              ARCMSR_MU_OUTBOUND_DOORBELL_INTMASKENABLE);
 860                 writel(mask, &reg->outbound_intmask);
 861                 acb->outbound_int_enable = ~(intmask_org & mask) & 0x000000ff;
 862                 }
 863                 break;
 864
 865         case ACB_ADAPTER_TYPE_B : {
 866                 struct MessageUnit_B *reg = (struct MessageUnit_B *)acb->pmu;
 867                 mask = intmask_org | (ARCMSR_IOP2DRV_DATA_WRITE_OK | \
 868                         ARCMSR_IOP2DRV_DATA_READ_OK | ARCMSR_IOP2DRV_CDB_DONE);
 869                 writel(mask, reg->iop2drv_doorbell_mask_reg);
 870                 acb->outbound_int_enable = (intmask_org | mask) & 0x0000000f;
 871                 }
 872         }
 873 }
 874
 875 static void arcmsr_build_ccb(struct AdapterControlBlock *acb,
 876         struct CommandControlBlock *ccb, struct scsi_cmnd *pcmd)
 877 {
 878         struct ARCMSR_CDB *arcmsr_cdb = (struct ARCMSR_CDB *)&ccb->arcmsr_cdb;
 879         int8_t *psge = (int8_t *)&arcmsr_cdb->u;
 880         uint32_t address_lo, address_hi;
 881         int arccdbsize = 0x30;
 882         int nseg;
 883
 884         ccb->pcmd = pcmd;
 885         memset(arcmsr_cdb, 0, sizeof(struct ARCMSR_CDB));
 886         arcmsr_cdb->Bus = 0;
 887         arcmsr_cdb->TargetID = pcmd->device->id;
 888         arcmsr_cdb->LUN = pcmd->device->lun;
 889         arcmsr_cdb->Function = 1;
 890         arcmsr_cdb->CdbLength = (uint8_t)pcmd->cmd_len;
 891         arcmsr_cdb->Context = (unsigned long)arcmsr_cdb;
 892         memcpy(arcmsr_cdb->Cdb, pcmd->cmnd, pcmd->cmd_len);
 893
 894         nseg = scsi_dma_map(pcmd);
 895         BUG_ON(nseg < 0);
 896
 897         if (nseg) {
 898                 int length, 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 *reg = (struct MessageUnit_A *)acb->pmu;
 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 = (struct MessageUnit_B *)acb->pmu;
 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 = (struct MessageUnit_A *)acb->pmu;
 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 = (struct MessageUnit_B *)acb->pmu;
 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 = (struct MessageUnit_A *)acb->pmu;
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 = (struct MessageUnit_B *)acb->pmu;
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 = (struct MessageUnit_A *)acb->pmu;
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 = (struct MessageUnit_B *)acb->pmu;
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 *arcmsr_get_iop_rqbuffer(struct AdapterControlBlock *acb)
1070 {
1071         static struct QBUFFER *qbuffer;
1072
1073         switch (acb->adapter_type) {
1074
1075         case ACB_ADAPTER_TYPE_A: {
1076                 struct MessageUnit_A __iomem *reg = (struct MessageUnit_A *)acb->pmu;
1077                 qbuffer = (struct QBUFFER __iomem *) &reg->message_rbuffer;
1078                 }
1079                 break;
1080
1081         case ACB_ADAPTER_TYPE_B: {
1082                 struct MessageUnit_B *reg = (struct MessageUnit_B *)acb->pmu;
1083                 qbuffer = (struct QBUFFER __iomem *) reg->ioctl_rbuffer_reg;
1084                 }
1085                 break;
1086         }
1087         return qbuffer;
1088 }
1089
1090 static struct QBUFFER *arcmsr_get_iop_wqbuffer(struct AdapterControlBlock *acb)
1091 {
1092         static struct QBUFFER *pqbuffer;
1093
1094         switch (acb->adapter_type) {
1095
1096         case ACB_ADAPTER_TYPE_A: {
1097                 struct MessageUnit_A __iomem *reg = (struct MessageUnit_A *)acb->pmu;
1098                 pqbuffer = (struct QBUFFER *) &reg->message_wbuffer;
1099                 }
1100                 break;
1101
1102         case ACB_ADAPTER_TYPE_B: {
1103                 struct MessageUnit_B  *reg = (struct MessageUnit_B *)acb->pmu;
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 *prbuffer;
1114         struct QBUFFER *pQbuffer;
1115         uint8_t *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 *)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 *pwbuffer;
1150                 uint8_t *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 = (struct MessageUnit_A *)acb->pmu;
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 = (struct MessageUnit_A *)acb->pmu;
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 = (struct MessageUnit_B *)acb->pmu;
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 = (struct MessageUnit_A *)acb->pmu;
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 = (struct MessageUnit_B *)acb->pmu;
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 *pwbuffer;
1304         uint8_t *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, 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 *prbuffer;
1379                         uint8_t *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 = (uint8_t *)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, 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 = (struct MessageUnit_A *)acb->pmu;
1668         char *acb_firm_model = acb->firm_model;
1669         char *acb_firm_version = acb->firm_version;
1670         char *iop_firm_model = (char *) (&reg->message_rwbuffer[15]);
1671         char *iop_firm_version = (char *) (&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 = (struct MessageUnit_B *)acb->pmu;
1709         uint32_t *lrwbuffer = reg->msgcode_rwbuffer_reg;
1710         char *acb_firm_model = acb->firm_model;
1711         char *acb_firm_version = acb->firm_version;
1712         char *iop_firm_model = (char *) (&lrwbuffer[15]);
1713         /*firm_model,15,60-67*/
1714         char *iop_firm_version = (char *) (&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 = (struct MessageUnit_A *)acb->pmu;
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 = (struct MessageUnit_B *)acb->pmu;
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 = \
1917                                         (struct MessageUnit_A *)acb->pmu;
1918                         uint32_t intmask_org;
1919                         intmask_org = arcmsr_disable_outbound_ints(acb);
1920                         writel(ARCMSR_SIGNATURE_SET_CONFIG, \
1921                                                 &reg->message_rwbuffer[0]);
1922                         writel(ccb_phyaddr_hi32, &reg->message_rwbuffer[1]);
1923                         writel(ARCMSR_INBOUND_MESG0_SET_CONFIG, \
1924                                                         &reg->inbound_msgaddr0);
1925                         if (arcmsr_hba_wait_msgint_ready(acb)) {
1926                                 printk(KERN_NOTICE "arcmsr%d: ""set ccb high \
1927                                 part physical address timeout\n",
1928                                 acb->host->host_no);
1929                                 return 1;
1930                         }
1931                         arcmsr_enable_outbound_ints(acb, intmask_org);
1932                 }
1933                 }
1934                 break;
1935
1936         case ACB_ADAPTER_TYPE_B: {
1937                 unsigned long post_queue_phyaddr;
1938                 uint32_t *rwbuffer;
1939
1940                 struct MessageUnit_B *reg = (struct MessageUnit_B *)acb->pmu;
1941                 uint32_t intmask_org;
1942                 intmask_org = arcmsr_disable_outbound_ints(acb);
1943                 reg->postq_index = 0;
1944                 reg->doneq_index = 0;
1945                 writel(ARCMSR_MESSAGE_SET_POST_WINDOW, reg->drv2iop_doorbell_reg);
1946                 if (arcmsr_hbb_wait_msgint_ready(acb)) {
1947                         printk(KERN_NOTICE "arcmsr%d:can not set diver mode\n", \
1948                                 acb->host->host_no);
1949                         return 1;
1950                 }
1951                 post_queue_phyaddr = cdb_phyaddr + ARCMSR_MAX_FREECCB_NUM * \
1952                 sizeof(struct CommandControlBlock) + offsetof(struct MessageUnit_B, post_qbuffer) ;
1953                 rwbuffer = reg->msgcode_rwbuffer_reg;
1954                 /* driver "set config" signature */
1955                 writel(ARCMSR_SIGNATURE_SET_CONFIG, rwbuffer++);
1956                 /* normal should be zero */
1957                 writel(ccb_phyaddr_hi32, rwbuffer++);
1958                 /* postQ size (256 + 8)*4        */
1959                 writel(post_queue_phyaddr, rwbuffer++);
1960                 /* doneQ size (256 + 8)*4        */
1961                 writel(post_queue_phyaddr + 1056, rwbuffer++);
1962                 /* ccb maxQ size must be --> [(256 + 8)*4]*/
1963                 writel(1056, rwbuffer);
1964
1965                 writel(ARCMSR_MESSAGE_SET_CONFIG, reg->drv2iop_doorbell_reg);
1966                 if (arcmsr_hbb_wait_msgint_ready(acb)) {
1967                         printk(KERN_NOTICE "arcmsr%d: 'set command Q window' \
1968                         timeout \n",acb->host->host_no);
1969                         return 1;
1970                 }
1971
1972                 writel(ARCMSR_MESSAGE_START_DRIVER_MODE, reg->drv2iop_doorbell_reg);
1973                 if (arcmsr_hbb_wait_msgint_ready(acb)) {
1974                         printk(KERN_NOTICE "arcmsr%d: 'can not set diver mode \n"\
1975                         ,acb->host->host_no);
1976                         return 1;
1977                 }
1978                 arcmsr_enable_outbound_ints(acb, intmask_org);
1979                 }
1980                 break;
1981         }
1982         return 0;
1983 }
1984
1985 static void arcmsr_wait_firmware_ready(struct AdapterControlBlock *acb)
1986 {
1987         uint32_t firmware_state = 0;
1988
1989         switch (acb->adapter_type) {
1990
1991         case ACB_ADAPTER_TYPE_A: {
1992                 struct MessageUnit_A __iomem *reg = (struct MessageUnit_A *)acb->pmu;
1993                 do {
1994                         firmware_state = readl(&reg->outbound_msgaddr1);
1995                 } while ((firmware_state & ARCMSR_OUTBOUND_MESG1_FIRMWARE_OK) == 0);
1996                 }
1997                 break;
1998
1999         case ACB_ADAPTER_TYPE_B: {
2000                 struct MessageUnit_B *reg = (struct MessageUnit_B *)acb->pmu;
2001                 do {
2002                         firmware_state = readl(reg->iop2drv_doorbell_reg);
2003                 } while ((firmware_state & ARCMSR_MESSAGE_FIRMWARE_OK) == 0);
2004                 }
2005                 break;
2006         }
2007 }
2008
2009 static void arcmsr_start_hba_bgrb(struct AdapterControlBlock *acb)
2010 {
2011         struct MessageUnit_A __iomem *reg = (struct MessageUnit_A *)acb->pmu;
2012         acb->acb_flags |= ACB_F_MSG_START_BGRB;
2013         writel(ARCMSR_INBOUND_MESG0_START_BGRB, &reg->inbound_msgaddr0);
2014         if (arcmsr_hba_wait_msgint_ready(acb)) {
2015                 printk(KERN_NOTICE "arcmsr%d: wait 'start adapter background \
2016                                 rebulid' timeout \n", acb->host->host_no);
2017         }
2018 }
2019
2020 static void arcmsr_start_hbb_bgrb(struct AdapterControlBlock *acb)
2021 {
2022         struct MessageUnit_B *reg = (struct MessageUnit_B *)acb->pmu;
2023         acb->acb_flags |= ACB_F_MSG_START_BGRB;
2024         writel(ARCMSR_MESSAGE_START_BGRB, reg->drv2iop_doorbell_reg);
2025         if (arcmsr_hbb_wait_msgint_ready(acb)) {
2026                 printk(KERN_NOTICE "arcmsr%d: wait 'start adapter background \
2027                                 rebulid' timeout \n",acb->host->host_no);
2028         }
2029 }
2030
2031 static void arcmsr_start_adapter_bgrb(struct AdapterControlBlock *acb)
2032 {
2033         switch (acb->adapter_type) {
2034         case ACB_ADAPTER_TYPE_A:
2035                 arcmsr_start_hba_bgrb(acb);
2036                 break;
2037         case ACB_ADAPTER_TYPE_B:
2038                 arcmsr_start_hbb_bgrb(acb);
2039                 break;
2040         }
2041 }
2042
2043 static void arcmsr_clear_doorbell_queue_buffer(struct AdapterControlBlock *acb)
2044 {
2045         switch (acb->adapter_type) {
2046         case ACB_ADAPTER_TYPE_A: {
2047                 struct MessageUnit_A *reg = (struct MessageUnit_A *)acb->pmu;
2048                 uint32_t outbound_doorbell;
2049                 /* empty doorbell Qbuffer if door bell ringed */
2050                 outbound_doorbell = readl(&reg->outbound_doorbell);
2051                 /*clear doorbell interrupt */
2052                 writel(outbound_doorbell, &reg->outbound_doorbell);
2053                 writel(ARCMSR_INBOUND_DRIVER_DATA_READ_OK, &reg->inbound_doorbell);
2054                 }
2055                 break;
2056
2057         case ACB_ADAPTER_TYPE_B: {
2058                 struct MessageUnit_B *reg = (struct MessageUnit_B *)acb->pmu;
2059                 /*clear interrupt and message state*/
2060                 writel(ARCMSR_MESSAGE_INT_CLEAR_PATTERN, reg->iop2drv_doorbell_reg);
2061                 writel(ARCMSR_DRV2IOP_DATA_READ_OK, reg->drv2iop_doorbell_reg);
2062                 /* let IOP know data has been read */
2063                 }
2064                 break;
2065         }
2066 }
2067
2068 static void arcmsr_iop_init(struct AdapterControlBlock *acb)
2069 {
2070         uint32_t intmask_org;
2071
2072         arcmsr_wait_firmware_ready(acb);
2073         arcmsr_iop_confirm(acb);
2074        /* disable all outbound interrupt */
2075        intmask_org = arcmsr_disable_outbound_ints(acb);
2076         arcmsr_get_firmware_spec(acb);
2077         /*start background rebuild*/
2078         arcmsr_start_adapter_bgrb(acb);
2079         /* empty doorbell Qbuffer if door bell ringed */
2080         arcmsr_clear_doorbell_queue_buffer(acb);
2081         /* enable outbound Post Queue,outbound doorbell Interrupt */
2082         arcmsr_enable_outbound_ints(acb, intmask_org);
2083         acb->acb_flags |= ACB_F_IOP_INITED;
2084 }
2085
2086 static void arcmsr_iop_reset(struct AdapterControlBlock *acb)
2087 {
2088         struct CommandControlBlock *ccb;
2089         uint32_t intmask_org;
2090         int i = 0;
2091
2092         if (atomic_read(&acb->ccboutstandingcount) != 0) {
2093                 /* talk to iop 331 outstanding command aborted */
2094                 arcmsr_abort_allcmd(acb);
2095
2096                 /* wait for 3 sec for all command aborted*/
2097                 ssleep(3);
2098
2099                 /* disable all outbound interrupt */
2100                 intmask_org = arcmsr_disable_outbound_ints(acb);
2101                 /* clear all outbound posted Q */
2102                 arcmsr_done4abort_postqueue(acb);
2103                 for (i = 0; i < ARCMSR_MAX_FREECCB_NUM; i++) {
2104                         ccb = acb->pccb_pool[i];
2105                         if (ccb->startdone == ARCMSR_CCB_START) {
2106                                 ccb->startdone = ARCMSR_CCB_ABORTED;
2107                                 arcmsr_ccb_complete(ccb, 1);
2108                         }
2109                 }
2110                 /* enable all outbound interrupt */
2111                 arcmsr_enable_outbound_ints(acb, intmask_org);
2112         }
2113 }
2114
2115 static int arcmsr_bus_reset(struct scsi_cmnd *cmd)
2116 {
2117         struct AdapterControlBlock *acb =
2118                 (struct AdapterControlBlock *)cmd->device->host->hostdata;
2119         int i;
2120
2121         acb->num_resets++;
2122         acb->acb_flags |= ACB_F_BUS_RESET;
2123         for (i = 0; i < 400; i++) {
2124                 if (!atomic_read(&acb->ccboutstandingcount))
2125                         break;
2126                 arcmsr_interrupt(acb);/* FIXME: need spinlock */
2127                 msleep(25);
2128         }
2129         arcmsr_iop_reset(acb);
2130         acb->acb_flags &= ~ACB_F_BUS_RESET;
2131         return SUCCESS;
2132 }
2133
2134 static void arcmsr_abort_one_cmd(struct AdapterControlBlock *acb,
2135                 struct CommandControlBlock *ccb)
2136 {
2137         u32 intmask;
2138
2139         ccb->startdone = ARCMSR_CCB_ABORTED;
2140
2141         /*
2142         ** Wait for 3 sec for all command done.
2143         */
2144         ssleep(3);
2145
2146         intmask = arcmsr_disable_outbound_ints(acb);
2147         arcmsr_polling_ccbdone(acb, ccb);
2148         arcmsr_enable_outbound_ints(acb, intmask);
2149 }
2150
2151 static int arcmsr_abort(struct scsi_cmnd *cmd)
2152 {
2153         struct AdapterControlBlock *acb =
2154                 (struct AdapterControlBlock *)cmd->device->host->hostdata;
2155         int i = 0;
2156
2157         printk(KERN_NOTICE
2158                 "arcmsr%d: abort device command of scsi id = %d lun = %d \n",
2159                 acb->host->host_no, cmd->device->id, cmd->device->lun);
2160         acb->num_aborts++;
2161         /*
2162         ************************************************
2163         ** the all interrupt service routine is locked
2164         ** we need to handle it as soon as possible and exit
2165         ************************************************
2166         */
2167         if (!atomic_read(&acb->ccboutstandingcount))
2168                 return SUCCESS;
2169
2170         for (i = 0; i < ARCMSR_MAX_FREECCB_NUM; i++) {
2171                 struct CommandControlBlock *ccb = acb->pccb_pool[i];
2172                 if (ccb->startdone == ARCMSR_CCB_START && ccb->pcmd == cmd) {
2173                         arcmsr_abort_one_cmd(acb, ccb);
2174                         break;
2175                 }
2176         }
2177
2178         return SUCCESS;
2179 }
2180
2181 static const char *arcmsr_info(struct Scsi_Host *host)
2182 {
2183         struct AdapterControlBlock *acb =
2184                 (struct AdapterControlBlock *) host->hostdata;
2185         static char buf[256];
2186         char *type;
2187         int raid6 = 1;
2188
2189         switch (acb->pdev->device) {
2190         case PCI_DEVICE_ID_ARECA_1110:
2191         case PCI_DEVICE_ID_ARECA_1200:
2192         case PCI_DEVICE_ID_ARECA_1202:
2193         case PCI_DEVICE_ID_ARECA_1210:
2194                 raid6 = 0;
2195                 /*FALLTHRU*/
2196         case PCI_DEVICE_ID_ARECA_1120:
2197         case PCI_DEVICE_ID_ARECA_1130:
2198         case PCI_DEVICE_ID_ARECA_1160:
2199         case PCI_DEVICE_ID_ARECA_1170:
2200         case PCI_DEVICE_ID_ARECA_1201:
2201         case PCI_DEVICE_ID_ARECA_1220:
2202         case PCI_DEVICE_ID_ARECA_1230:
2203         case PCI_DEVICE_ID_ARECA_1260:
2204         case PCI_DEVICE_ID_ARECA_1270:
2205         case PCI_DEVICE_ID_ARECA_1280:
2206                 type = "SATA";
2207                 break;
2208         case PCI_DEVICE_ID_ARECA_1380:
2209         case PCI_DEVICE_ID_ARECA_1381:
2210         case PCI_DEVICE_ID_ARECA_1680:
2211         case PCI_DEVICE_ID_ARECA_1681:
2212                 type = "SAS";
2213                 break;
2214         default:
2215                 type = "X-TYPE";
2216                 break;
2217         }
2218         sprintf(buf, "Areca %s Host Adapter RAID Controller%s\n %s",
2219                         type, raid6 ? "( RAID6 capable)" : "",
2220                         ARCMSR_DRIVER_VERSION);
2221         return buf;
2222 }
2223 #ifdef CONFIG_SCSI_ARCMSR_AER
2224 static pci_ers_result_t arcmsr_pci_slot_reset(struct pci_dev *pdev)
2225 {
2226         struct Scsi_Host *host = pci_get_drvdata(pdev);
2227         struct AdapterControlBlock *acb =
2228                 (struct AdapterControlBlock *) host->hostdata;
2229         uint32_t intmask_org;
2230         int i, j;
2231
2232         if (pci_enable_device(pdev)) {
2233                 return PCI_ERS_RESULT_DISCONNECT;
2234         }
2235         pci_set_master(pdev);
2236         intmask_org = arcmsr_disable_outbound_ints(acb);
2237         acb->acb_flags |= (ACB_F_MESSAGE_WQBUFFER_CLEARED |
2238                            ACB_F_MESSAGE_RQBUFFER_CLEARED |
2239                            ACB_F_MESSAGE_WQBUFFER_READED);
2240         acb->acb_flags &= ~ACB_F_SCSISTOPADAPTER;
2241         for (i = 0; i < ARCMSR_MAX_TARGETID; i++)
2242                 for (j = 0; j < ARCMSR_MAX_TARGETLUN; j++)
2243                         acb->devstate[i][j] = ARECA_RAID_GONE;
2244
2245         arcmsr_wait_firmware_ready(acb);
2246         arcmsr_iop_confirm(acb);
2247        /* disable all outbound interrupt */
2248         arcmsr_get_firmware_spec(acb);
2249         /*start background rebuild*/
2250         arcmsr_start_adapter_bgrb(acb);
2251         /* empty doorbell Qbuffer if door bell ringed */
2252         arcmsr_clear_doorbell_queue_buffer(acb);
2253         /* enable outbound Post Queue,outbound doorbell Interrupt */
2254         arcmsr_enable_outbound_ints(acb, intmask_org);
2255         acb->acb_flags |= ACB_F_IOP_INITED;
2256
2257         pci_enable_pcie_error_reporting(pdev);
2258         return PCI_ERS_RESULT_RECOVERED;
2259 }
2260
2261 static void arcmsr_pci_ers_need_reset_forepart(struct pci_dev *pdev)
2262 {
2263         struct Scsi_Host *host = pci_get_drvdata(pdev);
2264         struct AdapterControlBlock *acb = (struct AdapterControlBlock *)host->hostdata;
2265         struct CommandControlBlock *ccb;
2266         uint32_t intmask_org;
2267         int i = 0;
2268
2269         if (atomic_read(&acb->ccboutstandingcount) != 0) {
2270                 /* talk to iop 331 outstanding command aborted */
2271                 arcmsr_abort_allcmd(acb);
2272                 /* wait for 3 sec for all command aborted*/
2273                 ssleep(3);
2274                 /* disable all outbound interrupt */
2275                 intmask_org = arcmsr_disable_outbound_ints(acb);
2276                 /* clear all outbound posted Q */
2277                 arcmsr_done4abort_postqueue(acb);
2278                 for (i = 0; i < ARCMSR_MAX_FREECCB_NUM; i++) {
2279                         ccb = acb->pccb_pool[i];
2280                         if (ccb->startdone == ARCMSR_CCB_START) {
2281                                 ccb->startdone = ARCMSR_CCB_ABORTED;
2282                                 arcmsr_ccb_complete(ccb, 1);
2283                         }
2284                 }
2285                 /* enable all outbound interrupt */
2286                 arcmsr_enable_outbound_ints(acb, intmask_org);
2287         }
2288         pci_disable_device(pdev);
2289 }
2290
2291 static void arcmsr_pci_ers_disconnect_forepart(struct pci_dev *pdev)
2292 {
2293                         struct Scsi_Host *host = pci_get_drvdata(pdev);
2294                         struct AdapterControlBlock *acb = \
2295                                 (struct AdapterControlBlock *)host->hostdata;
2296
2297                         arcmsr_stop_adapter_bgrb(acb);
2298                         arcmsr_flush_adapter_cache(acb);
2299 }
2300
2301 static pci_ers_result_t arcmsr_pci_error_detected(struct pci_dev *pdev,
2302                                                 pci_channel_state_t state)
2303 {
2304         switch (state) {
2305         case pci_channel_io_frozen:
2306                         arcmsr_pci_ers_need_reset_forepart(pdev);
2307                         return PCI_ERS_RESULT_NEED_RESET;
2308         case pci_channel_io_perm_failure:
2309                         arcmsr_pci_ers_disconnect_forepart(pdev);
2310                         return PCI_ERS_RESULT_DISCONNECT;
2311                         break;
2312         default:
2313                         return PCI_ERS_RESULT_NEED_RESET;
2314           }
2315 }
2316 #endif