drivers/scsi/pm8001/pm8001_ctl.c

   1 /*
   2  * PMC-Sierra 8001/8081/8088/8089 SAS/SATA based host adapters driver
   3  *
   4  * Copyright (c) 2008-2009 USI Co., Ltd.
   5  * All rights reserved.
   6  *
   7  * Redistribution and use in source and binary forms, with or without
   8  * modification, are permitted provided that the following conditions
   9  * are met:
  10  * 1. Redistributions of source code must retain the above copyright
  11  *    notice, this list of conditions, and the following disclaimer,
  12  *    without modification.
  13  * 2. Redistributions in binary form must reproduce at minimum a disclaimer
  14  *    substantially similar to the "NO WARRANTY" disclaimer below
  15  *    ("Disclaimer") and any redistribution must be conditioned upon
  16  *    including a substantially similar Disclaimer requirement for further
  17  *    binary redistribution.
  18  * 3. Neither the names of the above-listed copyright holders nor the names
  19  *    of any contributors may be used to endorse or promote products derived
  20  *    from this software without specific prior written permission.
  21  *
  22  * Alternatively, this software may be distributed under the terms of the
  23  * GNU General Public License ("GPL") version 2 as published by the Free
  24  * Software Foundation.
  25  *
  26  * NO WARRANTY
  27  * THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS
  28  * "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT
  29  * LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTIBILITY AND FITNESS FOR
  30  * A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT
  31  * HOLDERS OR CONTRIBUTORS BE LIABLE FOR SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
  32  * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
  33  * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
  34  * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT,
  35  * STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING
  36  * IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE
  37  * POSSIBILITY OF SUCH DAMAGES.
  38  *
  39  */
  40 #include <linux/firmware.h>
  41 #include <linux/slab.h>
  42 #include "pm8001_sas.h"
  43 #include "pm8001_ctl.h"
  44
  45 /* scsi host attributes */
  46
  47 /**
  48  * pm8001_ctl_mpi_interface_rev_show - MPI interface revision number
  49  * @cdev: pointer to embedded class device
  50  * @buf: the buffer returned
  51  *
  52  * A sysfs 'read-only' shost attribute.
  53  */
  54 static ssize_t pm8001_ctl_mpi_interface_rev_show(struct device *cdev,
  55         struct device_attribute *attr, char *buf)
  56 {
  57         struct Scsi_Host *shost = class_to_shost(cdev);
  58         struct sas_ha_struct *sha = SHOST_TO_SAS_HA(shost);
  59         struct pm8001_hba_info *pm8001_ha = sha->lldd_ha;
  60
  61         if (pm8001_ha->chip_id == chip_8001) {
  62                 return snprintf(buf, PAGE_SIZE, "%d\n",
  63                         pm8001_ha->main_cfg_tbl.pm8001_tbl.interface_rev);
  64         } else {
  65                 return snprintf(buf, PAGE_SIZE, "%d\n",
  66                         pm8001_ha->main_cfg_tbl.pm80xx_tbl.interface_rev);
  67         }
  68 }
  69 static
  70 DEVICE_ATTR(interface_rev, S_IRUGO, pm8001_ctl_mpi_interface_rev_show, NULL);
  71
  72 /**
  73  * pm8001_ctl_fw_version_show - firmware version
  74  * @cdev: pointer to embedded class device
  75  * @buf: the buffer returned
  76  *
  77  * A sysfs 'read-only' shost attribute.
  78  */
  79 static ssize_t pm8001_ctl_fw_version_show(struct device *cdev,
  80         struct device_attribute *attr, char *buf)
  81 {
  82         struct Scsi_Host *shost = class_to_shost(cdev);
  83         struct sas_ha_struct *sha = SHOST_TO_SAS_HA(shost);
  84         struct pm8001_hba_info *pm8001_ha = sha->lldd_ha;
  85
  86         if (pm8001_ha->chip_id == chip_8001) {
  87                 return snprintf(buf, PAGE_SIZE, "%02x.%02x.%02x.%02x\n",
  88                 (u8)(pm8001_ha->main_cfg_tbl.pm8001_tbl.firmware_rev >> 24),
  89                 (u8)(pm8001_ha->main_cfg_tbl.pm8001_tbl.firmware_rev >> 16),
  90                 (u8)(pm8001_ha->main_cfg_tbl.pm8001_tbl.firmware_rev >> 8),
  91                 (u8)(pm8001_ha->main_cfg_tbl.pm8001_tbl.firmware_rev));
  92         } else {
  93                 return snprintf(buf, PAGE_SIZE, "%02x.%02x.%02x.%02x\n",
  94                 (u8)(pm8001_ha->main_cfg_tbl.pm80xx_tbl.firmware_rev >> 24),
  95                 (u8)(pm8001_ha->main_cfg_tbl.pm80xx_tbl.firmware_rev >> 16),
  96                 (u8)(pm8001_ha->main_cfg_tbl.pm80xx_tbl.firmware_rev >> 8),
  97                 (u8)(pm8001_ha->main_cfg_tbl.pm80xx_tbl.firmware_rev));
  98         }
  99 }
 100 static DEVICE_ATTR(fw_version, S_IRUGO, pm8001_ctl_fw_version_show, NULL);
 101 /**
 102  * pm8001_ctl_max_out_io_show - max outstanding io supported
 103  * @cdev: pointer to embedded class device
 104  * @buf: the buffer returned
 105  *
 106  * A sysfs 'read-only' shost attribute.
 107  */
 108 static ssize_t pm8001_ctl_max_out_io_show(struct device *cdev,
 109         struct device_attribute *attr, char *buf)
 110 {
 111         struct Scsi_Host *shost = class_to_shost(cdev);
 112         struct sas_ha_struct *sha = SHOST_TO_SAS_HA(shost);
 113         struct pm8001_hba_info *pm8001_ha = sha->lldd_ha;
 114
 115         if (pm8001_ha->chip_id == chip_8001) {
 116                 return snprintf(buf, PAGE_SIZE, "%d\n",
 117                         pm8001_ha->main_cfg_tbl.pm8001_tbl.max_out_io);
 118         } else {
 119                 return snprintf(buf, PAGE_SIZE, "%d\n",
 120                         pm8001_ha->main_cfg_tbl.pm80xx_tbl.max_out_io);
 121         }
 122 }
 123 static DEVICE_ATTR(max_out_io, S_IRUGO, pm8001_ctl_max_out_io_show, NULL);
 124 /**
 125  * pm8001_ctl_max_devices_show - max devices support
 126  * @cdev: pointer to embedded class device
 127  * @buf: the buffer returned
 128  *
 129  * A sysfs 'read-only' shost attribute.
 130  */
 131 static ssize_t pm8001_ctl_max_devices_show(struct device *cdev,
 132         struct device_attribute *attr, char *buf)
 133 {
 134         struct Scsi_Host *shost = class_to_shost(cdev);
 135         struct sas_ha_struct *sha = SHOST_TO_SAS_HA(shost);
 136         struct pm8001_hba_info *pm8001_ha = sha->lldd_ha;
 137
 138         if (pm8001_ha->chip_id == chip_8001) {
 139                 return snprintf(buf, PAGE_SIZE, "%04d\n",
 140                         (u16)(pm8001_ha->main_cfg_tbl.pm8001_tbl.max_sgl >> 16)
 141                         );
 142         } else {
 143                 return snprintf(buf, PAGE_SIZE, "%04d\n",
 144                         (u16)(pm8001_ha->main_cfg_tbl.pm80xx_tbl.max_sgl >> 16)
 145                         );
 146         }
 147 }
 148 static DEVICE_ATTR(max_devices, S_IRUGO, pm8001_ctl_max_devices_show, NULL);
 149 /**
 150  * pm8001_ctl_max_sg_list_show - max sg list supported iff not 0.0 for no
 151  * hardware limitation
 152  * @cdev: pointer to embedded class device
 153  * @buf: the buffer returned
 154  *
 155  * A sysfs 'read-only' shost attribute.
 156  */
 157 static ssize_t pm8001_ctl_max_sg_list_show(struct device *cdev,
 158         struct device_attribute *attr, char *buf)
 159 {
 160         struct Scsi_Host *shost = class_to_shost(cdev);
 161         struct sas_ha_struct *sha = SHOST_TO_SAS_HA(shost);
 162         struct pm8001_hba_info *pm8001_ha = sha->lldd_ha;
 163
 164         if (pm8001_ha->chip_id == chip_8001) {
 165                 return snprintf(buf, PAGE_SIZE, "%04d\n",
 166                         pm8001_ha->main_cfg_tbl.pm8001_tbl.max_sgl & 0x0000FFFF
 167                         );
 168         } else {
 169                 return snprintf(buf, PAGE_SIZE, "%04d\n",
 170                         pm8001_ha->main_cfg_tbl.pm80xx_tbl.max_sgl & 0x0000FFFF
 171                         );
 172         }
 173 }
 174 static DEVICE_ATTR(max_sg_list, S_IRUGO, pm8001_ctl_max_sg_list_show, NULL);
 175
 176 #define SAS_1_0 0x1
 177 #define SAS_1_1 0x2
 178 #define SAS_2_0 0x4
 179
 180 static ssize_t
 181 show_sas_spec_support_status(unsigned int mode, char *buf)
 182 {
 183         ssize_t len = 0;
 184
 185         if (mode & SAS_1_1)
 186                 len = sprintf(buf, "%s", "SAS1.1");
 187         if (mode & SAS_2_0)
 188                 len += sprintf(buf + len, "%s%s", len ? ", " : "", "SAS2.0");
 189         len += sprintf(buf + len, "\n");
 190
 191         return len;
 192 }
 193
 194 /**
 195  * pm8001_ctl_sas_spec_support_show - sas spec supported
 196  * @cdev: pointer to embedded class device
 197  * @buf: the buffer returned
 198  *
 199  * A sysfs 'read-only' shost attribute.
 200  */
 201 static ssize_t pm8001_ctl_sas_spec_support_show(struct device *cdev,
 202         struct device_attribute *attr, char *buf)
 203 {
 204         unsigned int mode;
 205         struct Scsi_Host *shost = class_to_shost(cdev);
 206         struct sas_ha_struct *sha = SHOST_TO_SAS_HA(shost);
 207         struct pm8001_hba_info *pm8001_ha = sha->lldd_ha;
 208         /* fe000000 means supports SAS2.1 */
 209         if (pm8001_ha->chip_id == chip_8001)
 210                 mode = (pm8001_ha->main_cfg_tbl.pm8001_tbl.ctrl_cap_flag &
 211                                                         0xfe000000)>>25;
 212         else
 213                 /* fe000000 means supports SAS2.1 */
 214                 mode = (pm8001_ha->main_cfg_tbl.pm80xx_tbl.ctrl_cap_flag &
 215                                                         0xfe000000)>>25;
 216         return show_sas_spec_support_status(mode, buf);
 217 }
 218 static DEVICE_ATTR(sas_spec_support, S_IRUGO,
 219                    pm8001_ctl_sas_spec_support_show, NULL);
 220
 221 /**
 222  * pm8001_ctl_sas_address_show - sas address
 223  * @cdev: pointer to embedded class device
 224  * @buf: the buffer returned
 225  *
 226  * This is the controller sas address
 227  *
 228  * A sysfs 'read-only' shost attribute.
 229  */
 230 static ssize_t pm8001_ctl_host_sas_address_show(struct device *cdev,
 231         struct device_attribute *attr, char *buf)
 232 {
 233         struct Scsi_Host *shost = class_to_shost(cdev);
 234         struct sas_ha_struct *sha = SHOST_TO_SAS_HA(shost);
 235         struct pm8001_hba_info *pm8001_ha = sha->lldd_ha;
 236         return snprintf(buf, PAGE_SIZE, "0x%016llx\n",
 237                         be64_to_cpu(*(__be64 *)pm8001_ha->sas_addr));
 238 }
 239 static DEVICE_ATTR(host_sas_address, S_IRUGO,
 240                    pm8001_ctl_host_sas_address_show, NULL);
 241
 242 /**
 243  * pm8001_ctl_logging_level_show - logging level
 244  * @cdev: pointer to embedded class device
 245  * @buf: the buffer returned
 246  *
 247  * A sysfs 'read/write' shost attribute.
 248  */
 249 static ssize_t pm8001_ctl_logging_level_show(struct device *cdev,
 250         struct device_attribute *attr, char *buf)
 251 {
 252         struct Scsi_Host *shost = class_to_shost(cdev);
 253         struct sas_ha_struct *sha = SHOST_TO_SAS_HA(shost);
 254         struct pm8001_hba_info *pm8001_ha = sha->lldd_ha;
 255
 256         return snprintf(buf, PAGE_SIZE, "%08xh\n", pm8001_ha->logging_level);
 257 }
 258 static ssize_t pm8001_ctl_logging_level_store(struct device *cdev,
 259         struct device_attribute *attr, const char *buf, size_t count)
 260 {
 261         struct Scsi_Host *shost = class_to_shost(cdev);
 262         struct sas_ha_struct *sha = SHOST_TO_SAS_HA(shost);
 263         struct pm8001_hba_info *pm8001_ha = sha->lldd_ha;
 264         int val = 0;
 265
 266         if (sscanf(buf, "%x", &val) != 1)
 267                 return -EINVAL;
 268
 269         pm8001_ha->logging_level = val;
 270         return strlen(buf);
 271 }
 272
 273 static DEVICE_ATTR(logging_level, S_IRUGO | S_IWUSR,
 274         pm8001_ctl_logging_level_show, pm8001_ctl_logging_level_store);
 275 /**
 276  * pm8001_ctl_aap_log_show - aap1 event log
 277  * @cdev: pointer to embedded class device
 278  * @buf: the buffer returned
 279  *
 280  * A sysfs 'read-only' shost attribute.
 281  */
 282 static ssize_t pm8001_ctl_aap_log_show(struct device *cdev,
 283         struct device_attribute *attr, char *buf)
 284 {
 285         struct Scsi_Host *shost = class_to_shost(cdev);
 286         struct sas_ha_struct *sha = SHOST_TO_SAS_HA(shost);
 287         struct pm8001_hba_info *pm8001_ha = sha->lldd_ha;
 288         int i;
 289 #define AAP1_MEMMAP(r, c) \
 290         (*(u32 *)((u8*)pm8001_ha->memoryMap.region[AAP1].virt_ptr + (r) * 32 \
 291         + (c)))
 292
 293         char *str = buf;
 294         int max = 2;
 295         for (i = 0; i < max; i++) {
 296                 str += sprintf(str, "0x%08x 0x%08x 0x%08x 0x%08x 0x%08x 0x%08x"
 297                                "0x%08x 0x%08x\n",
 298                                AAP1_MEMMAP(i, 0),
 299                                AAP1_MEMMAP(i, 4),
 300                                AAP1_MEMMAP(i, 8),
 301                                AAP1_MEMMAP(i, 12),
 302                                AAP1_MEMMAP(i, 16),
 303                                AAP1_MEMMAP(i, 20),
 304                                AAP1_MEMMAP(i, 24),
 305                                AAP1_MEMMAP(i, 28));
 306         }
 307
 308         return str - buf;
 309 }
 310 static DEVICE_ATTR(aap_log, S_IRUGO, pm8001_ctl_aap_log_show, NULL);
 311 /**
 312  * pm8001_ctl_aap_log_show - IOP event log
 313  * @cdev: pointer to embedded class device
 314  * @buf: the buffer returned
 315  *
 316  * A sysfs 'read-only' shost attribute.
 317  */
 318 static ssize_t pm8001_ctl_iop_log_show(struct device *cdev,
 319         struct device_attribute *attr, char *buf)
 320 {
 321         struct Scsi_Host *shost = class_to_shost(cdev);
 322         struct sas_ha_struct *sha = SHOST_TO_SAS_HA(shost);
 323         struct pm8001_hba_info *pm8001_ha = sha->lldd_ha;
 324 #define IOP_MEMMAP(r, c) \
 325         (*(u32 *)((u8*)pm8001_ha->memoryMap.region[IOP].virt_ptr + (r) * 32 \
 326         + (c)))
 327         int i;
 328         char *str = buf;
 329         int max = 2;
 330         for (i = 0; i < max; i++) {
 331                 str += sprintf(str, "0x%08x 0x%08x 0x%08x 0x%08x 0x%08x 0x%08x"
 332                                "0x%08x 0x%08x\n",
 333                                IOP_MEMMAP(i, 0),
 334                                IOP_MEMMAP(i, 4),
 335                                IOP_MEMMAP(i, 8),
 336                                IOP_MEMMAP(i, 12),
 337                                IOP_MEMMAP(i, 16),
 338                                IOP_MEMMAP(i, 20),
 339                                IOP_MEMMAP(i, 24),
 340                                IOP_MEMMAP(i, 28));
 341         }
 342
 343         return str - buf;
 344 }
 345 static DEVICE_ATTR(iop_log, S_IRUGO, pm8001_ctl_iop_log_show, NULL);
 346
 347 #define FLASH_CMD_NONE      0x00
 348 #define FLASH_CMD_UPDATE    0x01
 349 #define FLASH_CMD_SET_NVMD    0x02
 350
 351 struct flash_command {
 352      u8      command[8];
 353      int     code;
 354 };
 355
 356 static struct flash_command flash_command_table[] =
 357 {
 358      {"set_nvmd",    FLASH_CMD_SET_NVMD},
 359      {"update",      FLASH_CMD_UPDATE},
 360      {"",            FLASH_CMD_NONE} /* Last entry should be NULL. */
 361 };
 362
 363 struct error_fw {
 364      char    *reason;
 365      int     err_code;
 366 };
 367
 368 static struct error_fw flash_error_table[] =
 369 {
 370      {"Failed to open fw image file",   FAIL_OPEN_BIOS_FILE},
 371      {"image header mismatch",          FLASH_UPDATE_HDR_ERR},
 372      {"image offset mismatch",          FLASH_UPDATE_OFFSET_ERR},
 373      {"image CRC Error",                FLASH_UPDATE_CRC_ERR},
 374      {"image length Error.",            FLASH_UPDATE_LENGTH_ERR},
 375      {"Failed to program flash chip",   FLASH_UPDATE_HW_ERR},
 376      {"Flash chip not supported.",      FLASH_UPDATE_DNLD_NOT_SUPPORTED},
 377      {"Flash update disabled.",         FLASH_UPDATE_DISABLED},
 378      {"Flash in progress",              FLASH_IN_PROGRESS},
 379      {"Image file size Error",          FAIL_FILE_SIZE},
 380      {"Input parameter error",          FAIL_PARAMETERS},
 381      {"Out of memory",                  FAIL_OUT_MEMORY},
 382      {"OK", 0}  /* Last entry err_code = 0. */
 383 };
 384
 385 static int pm8001_set_nvmd(struct pm8001_hba_info *pm8001_ha)
 386 {
 387         struct pm8001_ioctl_payload     *payload;
 388         DECLARE_COMPLETION_ONSTACK(completion);
 389         u8              *ioctlbuffer = NULL;
 390         u32             length = 0;
 391         u32             ret = 0;
 392
 393         length = 1024 * 5 + sizeof(*payload) - 1;
 394         ioctlbuffer = kzalloc(length, GFP_KERNEL);
 395         if (!ioctlbuffer)
 396                 return -ENOMEM;
 397         if ((pm8001_ha->fw_image->size <= 0) ||
 398             (pm8001_ha->fw_image->size > 4096)) {
 399                 ret = FAIL_FILE_SIZE;
 400                 goto out;
 401         }
 402         payload = (struct pm8001_ioctl_payload *)ioctlbuffer;
 403         memcpy((u8 *)&payload->func_specific, (u8 *)pm8001_ha->fw_image->data,
 404                                 pm8001_ha->fw_image->size);
 405         payload->length = pm8001_ha->fw_image->size;
 406         payload->id = 0;
 407         payload->minor_function = 0x1;
 408         pm8001_ha->nvmd_completion = &completion;
 409         ret = PM8001_CHIP_DISP->set_nvmd_req(pm8001_ha, payload);
 410         wait_for_completion(&completion);
 411 out:
 412         kfree(ioctlbuffer);
 413         return ret;
 414 }
 415
 416 static int pm8001_update_flash(struct pm8001_hba_info *pm8001_ha)
 417 {
 418         struct pm8001_ioctl_payload     *payload;
 419         DECLARE_COMPLETION_ONSTACK(completion);
 420         u8              *ioctlbuffer = NULL;
 421         u32             length = 0;
 422         struct fw_control_info  *fwControl;
 423         u32             loopNumber, loopcount = 0;
 424         u32             sizeRead = 0;
 425         u32             partitionSize, partitionSizeTmp;
 426         u32             ret = 0;
 427         u32             partitionNumber = 0;
 428         struct pm8001_fw_image_header *image_hdr;
 429
 430         length = 1024 * 16 + sizeof(*payload) - 1;
 431         ioctlbuffer = kzalloc(length, GFP_KERNEL);
 432         image_hdr = (struct pm8001_fw_image_header *)pm8001_ha->fw_image->data;
 433         if (!ioctlbuffer)
 434                 return -ENOMEM;
 435         if (pm8001_ha->fw_image->size < 28) {
 436                 ret = FAIL_FILE_SIZE;
 437                 goto out;
 438         }
 439
 440         while (sizeRead < pm8001_ha->fw_image->size) {
 441                 partitionSizeTmp =
 442                         *(u32 *)((u8 *)&image_hdr->image_length + sizeRead);
 443                 partitionSize = be32_to_cpu(partitionSizeTmp);
 444                 loopcount = (partitionSize + HEADER_LEN)/IOCTL_BUF_SIZE;
 445                 if (loopcount % IOCTL_BUF_SIZE)
 446                         loopcount++;
 447                 if (loopcount == 0)
 448                         loopcount++;
 449                 for (loopNumber = 0; loopNumber < loopcount; loopNumber++) {
 450                         payload = (struct pm8001_ioctl_payload *)ioctlbuffer;
 451                         payload->length = 1024*16;
 452                         payload->id = 0;
 453                         fwControl =
 454                               (struct fw_control_info *)&payload->func_specific;
 455                         fwControl->len = IOCTL_BUF_SIZE;   /* IN */
 456                         fwControl->size = partitionSize + HEADER_LEN;/* IN */
 457                         fwControl->retcode = 0;/* OUT */
 458                         fwControl->offset = loopNumber * IOCTL_BUF_SIZE;/*OUT */
 459
 460                 /* for the last chunk of data in case file size is not even with
 461                 4k, load only the rest*/
 462                 if (((loopcount-loopNumber) == 1) &&
 463                         ((partitionSize + HEADER_LEN) % IOCTL_BUF_SIZE)) {
 464                         fwControl->len =
 465                                 (partitionSize + HEADER_LEN) % IOCTL_BUF_SIZE;
 466                         memcpy((u8 *)fwControl->buffer,
 467                                 (u8 *)pm8001_ha->fw_image->data + sizeRead,
 468                                 (partitionSize + HEADER_LEN) % IOCTL_BUF_SIZE);
 469                         sizeRead +=
 470                                 (partitionSize + HEADER_LEN) % IOCTL_BUF_SIZE;
 471                 } else {
 472                         memcpy((u8 *)fwControl->buffer,
 473                                 (u8 *)pm8001_ha->fw_image->data + sizeRead,
 474                                 IOCTL_BUF_SIZE);
 475                         sizeRead += IOCTL_BUF_SIZE;
 476                 }
 477
 478                 pm8001_ha->nvmd_completion = &completion;
 479                 ret = PM8001_CHIP_DISP->fw_flash_update_req(pm8001_ha, payload);
 480                 wait_for_completion(&completion);
 481                 if (ret || (fwControl->retcode > FLASH_UPDATE_IN_PROGRESS)) {
 482                         ret = fwControl->retcode;
 483                         kfree(ioctlbuffer);
 484                         ioctlbuffer = NULL;
 485                         break;
 486                 }
 487         }
 488         if (ret)
 489                 break;
 490         partitionNumber++;
 491 }
 492 out:
 493         kfree(ioctlbuffer);
 494         return ret;
 495 }
 496 static ssize_t pm8001_store_update_fw(struct device *cdev,
 497                                       struct device_attribute *attr,
 498                                       const char *buf, size_t count)
 499 {
 500         struct Scsi_Host *shost = class_to_shost(cdev);
 501         struct sas_ha_struct *sha = SHOST_TO_SAS_HA(shost);
 502         struct pm8001_hba_info *pm8001_ha = sha->lldd_ha;
 503         char *cmd_ptr, *filename_ptr;
 504         int res, i;
 505         int flash_command = FLASH_CMD_NONE;
 506         int err = 0;
 507         if (!capable(CAP_SYS_ADMIN))
 508                 return -EACCES;
 509
 510         cmd_ptr = kzalloc(count*2, GFP_KERNEL);
 511
 512         if (!cmd_ptr) {
 513                 err = FAIL_OUT_MEMORY;
 514                 goto out;
 515         }
 516
 517         filename_ptr = cmd_ptr + count;
 518         res = sscanf(buf, "%s %s", cmd_ptr, filename_ptr);
 519         if (res != 2) {
 520                 err = FAIL_PARAMETERS;
 521                 goto out1;
 522         }
 523
 524         for (i = 0; flash_command_table[i].code != FLASH_CMD_NONE; i++) {
 525                 if (!memcmp(flash_command_table[i].command,
 526                                  cmd_ptr, strlen(cmd_ptr))) {
 527                         flash_command = flash_command_table[i].code;
 528                         break;
 529                 }
 530         }
 531         if (flash_command == FLASH_CMD_NONE) {
 532                 err = FAIL_PARAMETERS;
 533                 goto out1;
 534         }
 535
 536         if (pm8001_ha->fw_status == FLASH_IN_PROGRESS) {
 537                 err = FLASH_IN_PROGRESS;
 538                 goto out1;
 539         }
 540         err = request_firmware(&pm8001_ha->fw_image,
 541                                filename_ptr,
 542                                pm8001_ha->dev);
 543
 544         if (err) {
 545                 PM8001_FAIL_DBG(pm8001_ha,
 546                         pm8001_printk("Failed to load firmware image file %s,"
 547                         " error %d\n", filename_ptr, err));
 548                 err = FAIL_OPEN_BIOS_FILE;
 549                 goto out1;
 550         }
 551
 552         switch (flash_command) {
 553         case FLASH_CMD_UPDATE:
 554                 pm8001_ha->fw_status = FLASH_IN_PROGRESS;
 555                 err = pm8001_update_flash(pm8001_ha);
 556                 break;
 557         case FLASH_CMD_SET_NVMD:
 558                 pm8001_ha->fw_status = FLASH_IN_PROGRESS;
 559                 err = pm8001_set_nvmd(pm8001_ha);
 560                 break;
 561         default:
 562                 pm8001_ha->fw_status = FAIL_PARAMETERS;
 563                 err = FAIL_PARAMETERS;
 564                 break;
 565         }
 566         release_firmware(pm8001_ha->fw_image);
 567 out1:
 568         kfree(cmd_ptr);
 569 out:
 570         pm8001_ha->fw_status = err;
 571
 572         if (!err)
 573                 return count;
 574         else
 575                 return -err;
 576 }
 577
 578 static ssize_t pm8001_show_update_fw(struct device *cdev,
 579                                      struct device_attribute *attr, char *buf)
 580 {
 581         int i;
 582         struct Scsi_Host *shost = class_to_shost(cdev);
 583         struct sas_ha_struct *sha = SHOST_TO_SAS_HA(shost);
 584         struct pm8001_hba_info *pm8001_ha = sha->lldd_ha;
 585
 586         for (i = 0; flash_error_table[i].err_code != 0; i++) {
 587                 if (flash_error_table[i].err_code == pm8001_ha->fw_status)
 588                         break;
 589         }
 590         if (pm8001_ha->fw_status != FLASH_IN_PROGRESS)
 591                 pm8001_ha->fw_status = FLASH_OK;
 592
 593         return snprintf(buf, PAGE_SIZE, "status=%x %s\n",
 594                         flash_error_table[i].err_code,
 595                         flash_error_table[i].reason);
 596 }
 597
 598 static DEVICE_ATTR(update_fw, S_IRUGO|S_IWUGO,
 599         pm8001_show_update_fw, pm8001_store_update_fw);
 600 struct device_attribute *pm8001_host_attrs[] = {
 601         &dev_attr_interface_rev,
 602         &dev_attr_fw_version,
 603         &dev_attr_update_fw,
 604         &dev_attr_aap_log,
 605         &dev_attr_iop_log,
 606         &dev_attr_max_out_io,
 607         &dev_attr_max_devices,
 608         &dev_attr_max_sg_list,
 609         &dev_attr_sas_spec_support,
 610         &dev_attr_logging_level,
 611         &dev_attr_host_sas_address,
 612         NULL,
 613 };
 614