text: /*
   * PMC-Sierra 8001/8081/8088/8089 SAS/SATA based host adapters driver
   *
   * Copyright (c) 2008-2009 USI Co., Ltd.
   * All rights reserved.
   *
   * Redistribution and use in source and binary forms, with or without
   * modification, are permitted provided that the following conditions
   * are met:
   * 1. Redistributions of source code must retain the above copyright
   *    notice, this list of conditions, and the following disclaimer,
   *    without modification.
   * 2. Redistributions in binary form must reproduce at minimum a disclaimer
   *    substantially similar to the "NO WARRANTY" disclaimer below
   *    ("Disclaimer") and any redistribution must be conditioned upon
   *    including a substantially similar Disclaimer requirement for further
   *    binary redistribution.
   * 3. Neither the names of the above-listed copyright holders nor the names
   *    of any contributors may be used to endorse or promote products derived
   *    from this software without specific prior written permission.
   *
   * Alternatively, this software may be distributed under the terms of the
   * GNU General Public License ("GPL") version 2 as published by the Free
   * Software Foundation.
   *
   * NO WARRANTY
   * THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS
   * "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT
   * LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTIBILITY AND FITNESS FOR
   * A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT
   * HOLDERS OR CONTRIBUTORS BE LIABLE FOR SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
   * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
   * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
   * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT,
   * STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING
   * IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE
   * POSSIBILITY OF SUCH DAMAGES.
   *
   */
  #include <linux/firmware.h>
  #include <linux/slab.h>
  #include "pm8001_sas.h"
  #include "pm8001_ctl.h"
  
  /* scsi host attributes */
  
  /**
   * pm8001_ctl_mpi_interface_rev_show - MPI interface revision number
   * @cdev: pointer to embedded class device
   * @attr: device attribute (unused)
   * @buf: the buffer returned
   *
   * A sysfs 'read-only' shost attribute.
   */
  static ssize_t pm8001_ctl_mpi_interface_rev_show(struct device *cdev,
  	struct device_attribute *attr, char *buf)
  {
  	struct Scsi_Host *shost = class_to_shost(cdev);
  	struct sas_ha_struct *sha = SHOST_TO_SAS_HA(shost);
  	struct pm8001_hba_info *pm8001_ha = sha->lldd_ha;
  
  	if (pm8001_ha->chip_id == chip_8001) {
  		return snprintf(buf, PAGE_SIZE, "%d\n",
  			pm8001_ha->main_cfg_tbl.pm8001_tbl.interface_rev);
  	} else {
  		return snprintf(buf, PAGE_SIZE, "%d\n",
  			pm8001_ha->main_cfg_tbl.pm80xx_tbl.interface_rev);
  	}
  }
  static
  DEVICE_ATTR(interface_rev, S_IRUGO, pm8001_ctl_mpi_interface_rev_show, NULL);
  
  /**
   * controller_fatal_error_show - check controller is under fatal err
   * @cdev: pointer to embedded class device
   * @attr: device attribute (unused)
   * @buf: the buffer returned
   *
   * A sysfs 'read only' shost attribute.
   */
  static ssize_t controller_fatal_error_show(struct device *cdev,
  		struct device_attribute *attr, char *buf)
  {
  	struct Scsi_Host *shost = class_to_shost(cdev);
  	struct sas_ha_struct *sha = SHOST_TO_SAS_HA(shost);
  	struct pm8001_hba_info *pm8001_ha = sha->lldd_ha;
  
  	return snprintf(buf, PAGE_SIZE, "%d\n",
  			pm8001_ha->controller_fatal_error);
  }
  static DEVICE_ATTR_RO(controller_fatal_error);
  
  /**
   * pm8001_ctl_fw_version_show - firmware version
   * @cdev: pointer to embedded class device
   * @attr: device attribute (unused)
   * @buf: the buffer returned
   *
   * A sysfs 'read-only' shost attribute.
   */
  static ssize_t pm8001_ctl_fw_version_show(struct device *cdev,
  	struct device_attribute *attr, char *buf)
  {
  	struct Scsi_Host *shost = class_to_shost(cdev);
  	struct sas_ha_struct *sha = SHOST_TO_SAS_HA(shost);
  	struct pm8001_hba_info *pm8001_ha = sha->lldd_ha;
  
  	if (pm8001_ha->chip_id == chip_8001) {
  		return snprintf(buf, PAGE_SIZE, "%02x.%02x.%02x.%02x\n",
  		(u8)(pm8001_ha->main_cfg_tbl.pm8001_tbl.firmware_rev >> 24),
  		(u8)(pm8001_ha->main_cfg_tbl.pm8001_tbl.firmware_rev >> 16),
  		(u8)(pm8001_ha->main_cfg_tbl.pm8001_tbl.firmware_rev >> 8),
  		(u8)(pm8001_ha->main_cfg_tbl.pm8001_tbl.firmware_rev));
  	} else {
  		return snprintf(buf, PAGE_SIZE, "%02x.%02x.%02x.%02x\n",
  		(u8)(pm8001_ha->main_cfg_tbl.pm80xx_tbl.firmware_rev >> 24),
  		(u8)(pm8001_ha->main_cfg_tbl.pm80xx_tbl.firmware_rev >> 16),
  		(u8)(pm8001_ha->main_cfg_tbl.pm80xx_tbl.firmware_rev >> 8),
  		(u8)(pm8001_ha->main_cfg_tbl.pm80xx_tbl.firmware_rev));
  	}
  }
  static DEVICE_ATTR(fw_version, S_IRUGO, pm8001_ctl_fw_version_show, NULL);
  
  /**
   * pm8001_ctl_ila_version_show - ila version
   * @cdev: pointer to embedded class device
   * @attr: device attribute (unused)
   * @buf: the buffer returned
   *
   * A sysfs 'read-only' shost attribute.
   */
  static ssize_t pm8001_ctl_ila_version_show(struct device *cdev,
  	struct device_attribute *attr, char *buf)
  {
  	struct Scsi_Host *shost = class_to_shost(cdev);
  	struct sas_ha_struct *sha = SHOST_TO_SAS_HA(shost);
  	struct pm8001_hba_info *pm8001_ha = sha->lldd_ha;
  
  	if (pm8001_ha->chip_id != chip_8001) {
  		return snprintf(buf, PAGE_SIZE, "%02x.%02x.%02x.%02x\n",
  		(u8)(pm8001_ha->main_cfg_tbl.pm80xx_tbl.ila_version >> 24),
  		(u8)(pm8001_ha->main_cfg_tbl.pm80xx_tbl.ila_version >> 16),
  		(u8)(pm8001_ha->main_cfg_tbl.pm80xx_tbl.ila_version >> 8),
  		(u8)(pm8001_ha->main_cfg_tbl.pm80xx_tbl.ila_version));
  	}
  	return 0;
  }
  static DEVICE_ATTR(ila_version, 0444, pm8001_ctl_ila_version_show, NULL);
  
  /**
   * pm8001_ctl_inactive_fw_version_show - Inacative firmware version number
   * @cdev: pointer to embedded class device
   * @attr: device attribute (unused)
   * @buf: the buffer returned
   *
   * A sysfs 'read-only' shost attribute.
   */
  static ssize_t pm8001_ctl_inactive_fw_version_show(struct device *cdev,
  	struct device_attribute *attr, char *buf)
  {
  	struct Scsi_Host *shost = class_to_shost(cdev);
  	struct sas_ha_struct *sha = SHOST_TO_SAS_HA(shost);
  	struct pm8001_hba_info *pm8001_ha = sha->lldd_ha;
  
  	if (pm8001_ha->chip_id != chip_8001) {
  		return snprintf(buf, PAGE_SIZE, "%02x.%02x.%02x.%02x\n",
  		(u8)(pm8001_ha->main_cfg_tbl.pm80xx_tbl.inc_fw_version >> 24),
  		(u8)(pm8001_ha->main_cfg_tbl.pm80xx_tbl.inc_fw_version >> 16),
  		(u8)(pm8001_ha->main_cfg_tbl.pm80xx_tbl.inc_fw_version >> 8),
  		(u8)(pm8001_ha->main_cfg_tbl.pm80xx_tbl.inc_fw_version));
  	}
  	return 0;
  }
  static
  DEVICE_ATTR(inc_fw_ver, 0444, pm8001_ctl_inactive_fw_version_show, NULL);
  
  /**
   * pm8001_ctl_max_out_io_show - max outstanding io supported
   * @cdev: pointer to embedded class device
   * @attr: device attribute (unused)
   * @buf: the buffer returned
   *
   * A sysfs 'read-only' shost attribute.
   */
  static ssize_t pm8001_ctl_max_out_io_show(struct device *cdev,
  	struct device_attribute *attr, char *buf)
  {
  	struct Scsi_Host *shost = class_to_shost(cdev);
  	struct sas_ha_struct *sha = SHOST_TO_SAS_HA(shost);
  	struct pm8001_hba_info *pm8001_ha = sha->lldd_ha;
  
  	if (pm8001_ha->chip_id == chip_8001) {
  		return snprintf(buf, PAGE_SIZE, "%d\n",
  			pm8001_ha->main_cfg_tbl.pm8001_tbl.max_out_io);
  	} else {
  		return snprintf(buf, PAGE_SIZE, "%d\n",
  			pm8001_ha->main_cfg_tbl.pm80xx_tbl.max_out_io);
  	}
  }
  static DEVICE_ATTR(max_out_io, S_IRUGO, pm8001_ctl_max_out_io_show, NULL);
  /**
   * pm8001_ctl_max_devices_show - max devices support
   * @cdev: pointer to embedded class device
   * @attr: device attribute (unused)
   * @buf: the buffer returned
   *
   * A sysfs 'read-only' shost attribute.
   */
  static ssize_t pm8001_ctl_max_devices_show(struct device *cdev,
  	struct device_attribute *attr, char *buf)
  {
  	struct Scsi_Host *shost = class_to_shost(cdev);
  	struct sas_ha_struct *sha = SHOST_TO_SAS_HA(shost);
  	struct pm8001_hba_info *pm8001_ha = sha->lldd_ha;
  
  	if (pm8001_ha->chip_id == chip_8001) {
  		return snprintf(buf, PAGE_SIZE, "%04d\n",
  			(u16)(pm8001_ha->main_cfg_tbl.pm8001_tbl.max_sgl >> 16)
  			);
  	} else {
  		return snprintf(buf, PAGE_SIZE, "%04d\n",
  			(u16)(pm8001_ha->main_cfg_tbl.pm80xx_tbl.max_sgl >> 16)
  			);
  	}
  }
  static DEVICE_ATTR(max_devices, S_IRUGO, pm8001_ctl_max_devices_show, NULL);
  /**
   * pm8001_ctl_max_sg_list_show - max sg list supported iff not 0.0 for no
   * hardware limitation
   * @cdev: pointer to embedded class device
   * @attr: device attribute (unused)
   * @buf: the buffer returned
   *
   * A sysfs 'read-only' shost attribute.
   */
  static ssize_t pm8001_ctl_max_sg_list_show(struct device *cdev,
  	struct device_attribute *attr, char *buf)
  {
  	struct Scsi_Host *shost = class_to_shost(cdev);
  	struct sas_ha_struct *sha = SHOST_TO_SAS_HA(shost);
  	struct pm8001_hba_info *pm8001_ha = sha->lldd_ha;
  
  	if (pm8001_ha->chip_id == chip_8001) {
  		return snprintf(buf, PAGE_SIZE, "%04d\n",
  			pm8001_ha->main_cfg_tbl.pm8001_tbl.max_sgl & 0x0000FFFF
  			);
  	} else {
  		return snprintf(buf, PAGE_SIZE, "%04d\n",
  			pm8001_ha->main_cfg_tbl.pm80xx_tbl.max_sgl & 0x0000FFFF
  			);
  	}
  }
  static DEVICE_ATTR(max_sg_list, S_IRUGO, pm8001_ctl_max_sg_list_show, NULL);
  
  #define SAS_1_0 0x1
  #define SAS_1_1 0x2
  #define SAS_2_0 0x4
  
  static ssize_t
  show_sas_spec_support_status(unsigned int mode, char *buf)
  {
  	ssize_t len = 0;
  
  	if (mode & SAS_1_1)
  		len = sprintf(buf, "%s", "SAS1.1");
  	if (mode & SAS_2_0)
  		len += sprintf(buf + len, "%s%s", len ? ", " : "", "SAS2.0");
  	len += sprintf(buf + len, "\n");
  
  	return len;
  }
  
  /**
   * pm8001_ctl_sas_spec_support_show - sas spec supported
   * @cdev: pointer to embedded class device
   * @attr: device attribute (unused)
   * @buf: the buffer returned
   *
   * A sysfs 'read-only' shost attribute.
   */
  static ssize_t pm8001_ctl_sas_spec_support_show(struct device *cdev,
  	struct device_attribute *attr, char *buf)
  {
  	unsigned int mode;
  	struct Scsi_Host *shost = class_to_shost(cdev);
  	struct sas_ha_struct *sha = SHOST_TO_SAS_HA(shost);
  	struct pm8001_hba_info *pm8001_ha = sha->lldd_ha;
  	/* fe000000 means supports SAS2.1 */
  	if (pm8001_ha->chip_id == chip_8001)
  		mode = (pm8001_ha->main_cfg_tbl.pm8001_tbl.ctrl_cap_flag &
  							0xfe000000)>>25;
  	else
  		/* fe000000 means supports SAS2.1 */
  		mode = (pm8001_ha->main_cfg_tbl.pm80xx_tbl.ctrl_cap_flag &
  							0xfe000000)>>25;
  	return show_sas_spec_support_status(mode, buf);
  }
  static DEVICE_ATTR(sas_spec_support, S_IRUGO,
  		   pm8001_ctl_sas_spec_support_show, NULL);
  
  /**
   * pm8001_ctl_sas_address_show - sas address
   * @cdev: pointer to embedded class device
   * @attr: device attribute (unused)
   * @buf: the buffer returned
   *
   * This is the controller sas address
   *
   * A sysfs 'read-only' shost attribute.
   */
  static ssize_t pm8001_ctl_host_sas_address_show(struct device *cdev,
  	struct device_attribute *attr, char *buf)
  {
  	struct Scsi_Host *shost = class_to_shost(cdev);
  	struct sas_ha_struct *sha = SHOST_TO_SAS_HA(shost);
  	struct pm8001_hba_info *pm8001_ha = sha->lldd_ha;
  	return snprintf(buf, PAGE_SIZE, "0x%016llx\n",
  			be64_to_cpu(*(__be64 *)pm8001_ha->sas_addr));
  }
  static DEVICE_ATTR(host_sas_address, S_IRUGO,
  		   pm8001_ctl_host_sas_address_show, NULL);
  
  /**
   * pm8001_ctl_logging_level_show - logging level
   * @cdev: pointer to embedded class device
   * @attr: device attribute (unused)
   * @buf: the buffer returned
   *
   * A sysfs 'read/write' shost attribute.
   */
  static ssize_t pm8001_ctl_logging_level_show(struct device *cdev,
  	struct device_attribute *attr, char *buf)
  {
  	struct Scsi_Host *shost = class_to_shost(cdev);
  	struct sas_ha_struct *sha = SHOST_TO_SAS_HA(shost);
  	struct pm8001_hba_info *pm8001_ha = sha->lldd_ha;
  
  	return snprintf(buf, PAGE_SIZE, "%08xh\n", pm8001_ha->logging_level);
  }
  
  static ssize_t pm8001_ctl_logging_level_store(struct device *cdev,
  	struct device_attribute *attr, const char *buf, size_t count)
  {
  	struct Scsi_Host *shost = class_to_shost(cdev);
  	struct sas_ha_struct *sha = SHOST_TO_SAS_HA(shost);
  	struct pm8001_hba_info *pm8001_ha = sha->lldd_ha;
  	int val = 0;
  
  	if (sscanf(buf, "%x", &val) != 1)
  		return -EINVAL;
  
  	pm8001_ha->logging_level = val;
  	return strlen(buf);
  }
  
  static DEVICE_ATTR(logging_level, S_IRUGO | S_IWUSR,
  	pm8001_ctl_logging_level_show, pm8001_ctl_logging_level_store);
  /**
   * pm8001_ctl_aap_log_show - aap1 event log
   * @cdev: pointer to embedded class device
   * @attr: device attribute (unused)
   * @buf: the buffer returned
   *
   * A sysfs 'read-only' shost attribute.
   */
  static ssize_t pm8001_ctl_aap_log_show(struct device *cdev,
  	struct device_attribute *attr, char *buf)
  {
  	struct Scsi_Host *shost = class_to_shost(cdev);
  	struct sas_ha_struct *sha = SHOST_TO_SAS_HA(shost);
  	struct pm8001_hba_info *pm8001_ha = sha->lldd_ha;
  	int i;
  #define AAP1_MEMMAP(r, c) \
  	(*(u32 *)((u8*)pm8001_ha->memoryMap.region[AAP1].virt_ptr + (r) * 32 \
  	+ (c)))
  
  	char *str = buf;
  	int max = 2;
  	for (i = 0; i < max; i++) {
  		str += sprintf(str, "0x%08x 0x%08x 0x%08x 0x%08x 0x%08x 0x%08x"
  			       "0x%08x 0x%08x\n",
  			       AAP1_MEMMAP(i, 0),
  			       AAP1_MEMMAP(i, 4),
  			       AAP1_MEMMAP(i, 8),
  			       AAP1_MEMMAP(i, 12),
  			       AAP1_MEMMAP(i, 16),
  			       AAP1_MEMMAP(i, 20),
  			       AAP1_MEMMAP(i, 24),
  			       AAP1_MEMMAP(i, 28));
  	}
  
  	return str - buf;
  }
  static DEVICE_ATTR(aap_log, S_IRUGO, pm8001_ctl_aap_log_show, NULL);
  /**
   * pm8001_ctl_ib_queue_log_show - Out bound Queue log
   * @cdev:pointer to embedded class device
   * @attr: device attribute (unused)
   * @buf: the buffer returned
   * A sysfs 'read-only' shost attribute.
   */
  static ssize_t pm8001_ctl_ib_queue_log_show(struct device *cdev,
  	struct device_attribute *attr, char *buf)
  {
  	struct Scsi_Host *shost = class_to_shost(cdev);
  	struct sas_ha_struct *sha = SHOST_TO_SAS_HA(shost);
  	struct pm8001_hba_info *pm8001_ha = sha->lldd_ha;
  	int offset;
  	char *str = buf;
  	int start = 0;
  	u32 ib_offset = pm8001_ha->ib_offset;
  #define IB_MEMMAP(c)	\
  		(*(u32 *)((u8 *)pm8001_ha->	\
  		memoryMap.region[ib_offset].virt_ptr +	\
  		pm8001_ha->evtlog_ib_offset + (c)))
  
  	for (offset = 0; offset < IB_OB_READ_TIMES; offset++) {
  		str += sprintf(str, "0x%08x\n", IB_MEMMAP(start));
  		start = start + 4;
  	}
  	pm8001_ha->evtlog_ib_offset += SYSFS_OFFSET;
  	if (((pm8001_ha->evtlog_ib_offset) % (PM80XX_IB_OB_QUEUE_SIZE)) == 0)
  		pm8001_ha->evtlog_ib_offset = 0;
  
  	return str - buf;
  }
  
  static DEVICE_ATTR(ib_log, S_IRUGO, pm8001_ctl_ib_queue_log_show, NULL);
  /**
   * pm8001_ctl_ob_queue_log_show - Out bound Queue log
   * @cdev:pointer to embedded class device
   * @attr: device attribute (unused)
   * @buf: the buffer returned
   * A sysfs 'read-only' shost attribute.
   */
  
  static ssize_t pm8001_ctl_ob_queue_log_show(struct device *cdev,
  	struct device_attribute *attr, char *buf)
  {
  	struct Scsi_Host *shost = class_to_shost(cdev);
  	struct sas_ha_struct *sha = SHOST_TO_SAS_HA(shost);
  	struct pm8001_hba_info *pm8001_ha = sha->lldd_ha;
  	int offset;
  	char *str = buf;
  	int start = 0;
  	u32 ob_offset = pm8001_ha->ob_offset;
  #define OB_MEMMAP(c)	\
  		(*(u32 *)((u8 *)pm8001_ha->	\
  		memoryMap.region[ob_offset].virt_ptr +	\
  		pm8001_ha->evtlog_ob_offset + (c)))
  
  	for (offset = 0; offset < IB_OB_READ_TIMES; offset++) {
  		str += sprintf(str, "0x%08x\n", OB_MEMMAP(start));
  		start = start + 4;
  	}
  	pm8001_ha->evtlog_ob_offset += SYSFS_OFFSET;
  	if (((pm8001_ha->evtlog_ob_offset) % (PM80XX_IB_OB_QUEUE_SIZE)) == 0)
  		pm8001_ha->evtlog_ob_offset = 0;
  
  	return str - buf;
  }
  static DEVICE_ATTR(ob_log, S_IRUGO, pm8001_ctl_ob_queue_log_show, NULL);
  /**
   * pm8001_ctl_bios_version_show - Bios version Display
   * @cdev:pointer to embedded class device
   * @attr: device attribute (unused)
   * @buf:the buffer returned
   * A sysfs 'read-only' shost attribute.
   */
  static ssize_t pm8001_ctl_bios_version_show(struct device *cdev,
  	struct device_attribute *attr, char *buf)
  {
  	struct Scsi_Host *shost = class_to_shost(cdev);
  	struct sas_ha_struct *sha = SHOST_TO_SAS_HA(shost);
  	struct pm8001_hba_info *pm8001_ha = sha->lldd_ha;
  	char *str = buf;
  	int bios_index;
  	DECLARE_COMPLETION_ONSTACK(completion);
  	struct pm8001_ioctl_payload payload;
  
  	pm8001_ha->nvmd_completion = &completion;
  	payload.minor_function = 7;
  	payload.offset = 0;
  	payload.rd_length = 4096;
  	payload.func_specific = kzalloc(4096, GFP_KERNEL);
  	if (!payload.func_specific)
  		return -ENOMEM;
  	if (PM8001_CHIP_DISP->get_nvmd_req(pm8001_ha, &payload)) {
  		kfree(payload.func_specific);
  		return -ENOMEM;
  	}
  	wait_for_completion(&completion);
  	for (bios_index = BIOSOFFSET; bios_index < BIOS_OFFSET_LIMIT;
  		bios_index++)
  		str += sprintf(str, "%c",
  			*(payload.func_specific+bios_index));
  	kfree(payload.func_specific);
  	return str - buf;
  }
  static DEVICE_ATTR(bios_version, S_IRUGO, pm8001_ctl_bios_version_show, NULL);
  /**
   * event_log_size_show - event log size
   * @cdev: pointer to embedded class device
   * @attr: device attribute (unused)
   * @buf: the buffer returned
   *
   * A sysfs read  shost attribute.
   */
  static ssize_t event_log_size_show(struct device *cdev,
  	struct device_attribute *attr, char *buf)
  {
  	struct Scsi_Host *shost = class_to_shost(cdev);
  	struct sas_ha_struct *sha = SHOST_TO_SAS_HA(shost);
  	struct pm8001_hba_info *pm8001_ha = sha->lldd_ha;
  
  	return snprintf(buf, PAGE_SIZE, "%d\n",
  		pm8001_ha->main_cfg_tbl.pm80xx_tbl.event_log_size);
  }
  static DEVICE_ATTR_RO(event_log_size);
  /**
   * pm8001_ctl_aap_log_show - IOP event log
   * @cdev: pointer to embedded class device
   * @attr: device attribute (unused)
   * @buf: the buffer returned
   *
   * A sysfs 'read-only' shost attribute.
   */
  static ssize_t pm8001_ctl_iop_log_show(struct device *cdev,
  	struct device_attribute *attr, char *buf)
  {
  	struct Scsi_Host *shost = class_to_shost(cdev);
  	struct sas_ha_struct *sha = SHOST_TO_SAS_HA(shost);
  	struct pm8001_hba_info *pm8001_ha = sha->lldd_ha;
  	char *str = buf;
  	u32 read_size =
  		pm8001_ha->main_cfg_tbl.pm80xx_tbl.event_log_size / 1024;
  	static u32 start, end, count;
  	u32 max_read_times = 32;
  	u32 max_count = (read_size * 1024) / (max_read_times * 4);
  	u32 *temp = (u32 *)pm8001_ha->memoryMap.region[IOP].virt_ptr;
  
  	if ((count % max_count) == 0) {
  		start = 0;
  		end = max_read_times;
  		count = 0;
  	} else {
  		start = end;
  		end = end + max_read_times;
  	}
  
  	for (; start < end; start++)
  		str += sprintf(str, "%08x ", *(temp+start));
  	count++;
  	return str - buf;
  }
  static DEVICE_ATTR(iop_log, S_IRUGO, pm8001_ctl_iop_log_show, NULL);
  
  /**
   ** pm8001_ctl_fatal_log_show - fatal error logging
   ** @cdev:pointer to embedded class device
   ** @attr: device attribute
   ** @buf: the buffer returned
   **
   ** A sysfs 'read-only' shost attribute.
   **/
  
  static ssize_t pm8001_ctl_fatal_log_show(struct device *cdev,
  	struct device_attribute *attr, char *buf)
  {
  	ssize_t count;
  
  	count = pm80xx_get_fatal_dump(cdev, attr, buf);
  	return count;
  }
  
  static DEVICE_ATTR(fatal_log, S_IRUGO, pm8001_ctl_fatal_log_show, NULL);
  
  /**
   ** non_fatal_log_show - non fatal error logging
   ** @cdev:pointer to embedded class device
   ** @attr: device attribute
   ** @buf: the buffer returned
   **
   ** A sysfs 'read-only' shost attribute.
   **/
  static ssize_t non_fatal_log_show(struct device *cdev,
  	struct device_attribute *attr, char *buf)
  {
  	u32 count;
  
  	count = pm80xx_get_non_fatal_dump(cdev, attr, buf);
  	return count;
  }
  static DEVICE_ATTR_RO(non_fatal_log);
  
  static ssize_t non_fatal_count_show(struct device *cdev,
  		struct device_attribute *attr, char *buf)
  {
  	struct Scsi_Host *shost = class_to_shost(cdev);
  	struct sas_ha_struct *sha = SHOST_TO_SAS_HA(shost);
  	struct pm8001_hba_info *pm8001_ha = sha->lldd_ha;
  
  	return snprintf(buf, PAGE_SIZE, "%08x",
  			pm8001_ha->non_fatal_count);
  }
  
  static ssize_t non_fatal_count_store(struct device *cdev,
  		struct device_attribute *attr, const char *buf, size_t count)
  {
  	struct Scsi_Host *shost = class_to_shost(cdev);
  	struct sas_ha_struct *sha = SHOST_TO_SAS_HA(shost);
  	struct pm8001_hba_info *pm8001_ha = sha->lldd_ha;
  	int val = 0;
  
  	if (kstrtoint(buf, 16, &val) != 0)
  		return -EINVAL;
  
  	pm8001_ha->non_fatal_count = val;
  	return strlen(buf);
  }
  static DEVICE_ATTR_RW(non_fatal_count);
  
  /**
   ** pm8001_ctl_gsm_log_show - gsm dump collection
   ** @cdev:pointer to embedded class device
   ** @attr: device attribute (unused)
   ** @buf: the buffer returned
   ** A sysfs 'read-only' shost attribute.
   **/
  static ssize_t pm8001_ctl_gsm_log_show(struct device *cdev,
  	struct device_attribute *attr, char *buf)
  {
  	ssize_t count;
  
  	count = pm8001_get_gsm_dump(cdev, SYSFS_OFFSET, buf);
  	return count;
  }
  
  static DEVICE_ATTR(gsm_log, S_IRUGO, pm8001_ctl_gsm_log_show, NULL);
  
  #define FLASH_CMD_NONE      0x00
  #define FLASH_CMD_UPDATE    0x01
  #define FLASH_CMD_SET_NVMD    0x02
  
  struct flash_command {
       u8      command[8];
       int     code;
  };
  
  static struct flash_command flash_command_table[] =
  {
       {"set_nvmd",    FLASH_CMD_SET_NVMD},
       {"update",      FLASH_CMD_UPDATE},
       {"",            FLASH_CMD_NONE} /* Last entry should be NULL. */
  };
  
  struct error_fw {
       char    *reason;
       int     err_code;
  };
  
  static struct error_fw flash_error_table[] =
  {
       {"Failed to open fw image file",	FAIL_OPEN_BIOS_FILE},
       {"image header mismatch",		FLASH_UPDATE_HDR_ERR},
       {"image offset mismatch",		FLASH_UPDATE_OFFSET_ERR},
       {"image CRC Error",		FLASH_UPDATE_CRC_ERR},
       {"image length Error.",		FLASH_UPDATE_LENGTH_ERR},
       {"Failed to program flash chip",	FLASH_UPDATE_HW_ERR},
       {"Flash chip not supported.",	FLASH_UPDATE_DNLD_NOT_SUPPORTED},
       {"Flash update disabled.",		FLASH_UPDATE_DISABLED},
       {"Flash in progress",		FLASH_IN_PROGRESS},
       {"Image file size Error",		FAIL_FILE_SIZE},
       {"Input parameter error",		FAIL_PARAMETERS},
       {"Out of memory",			FAIL_OUT_MEMORY},
       {"OK", 0}	/* Last entry err_code = 0. */
  };
  
  static int pm8001_set_nvmd(struct pm8001_hba_info *pm8001_ha)
  {
  	struct pm8001_ioctl_payload	*payload;
  	DECLARE_COMPLETION_ONSTACK(completion);
  	u8		*ioctlbuffer;
  	u32		ret;
  	u32		length = 1024 * 5 + sizeof(*payload) - 1;
  
  	if (pm8001_ha->fw_image->size > 4096) {
  		pm8001_ha->fw_status = FAIL_FILE_SIZE;
  		return -EFAULT;
  	}
  
  	ioctlbuffer = kzalloc(length, GFP_KERNEL);
  	if (!ioctlbuffer) {
  		pm8001_ha->fw_status = FAIL_OUT_MEMORY;
  		return -ENOMEM;
  	}
  	payload = (struct pm8001_ioctl_payload *)ioctlbuffer;
  	memcpy((u8 *)&payload->func_specific, (u8 *)pm8001_ha->fw_image->data,
  				pm8001_ha->fw_image->size);
  	payload->wr_length = pm8001_ha->fw_image->size;
  	payload->id = 0;
  	payload->minor_function = 0x1;
  	pm8001_ha->nvmd_completion = &completion;
  	ret = PM8001_CHIP_DISP->set_nvmd_req(pm8001_ha, payload);
  	if (ret) {
  		pm8001_ha->fw_status = FAIL_OUT_MEMORY;
  		goto out;
  	}
  	wait_for_completion(&completion);
  out:
  	kfree(ioctlbuffer);
  	return ret;
  }
  
  static int pm8001_update_flash(struct pm8001_hba_info *pm8001_ha)
  {
  	struct pm8001_ioctl_payload	*payload;
  	DECLARE_COMPLETION_ONSTACK(completion);
  	u8		*ioctlbuffer;
  	struct fw_control_info	*fwControl;
  	u32		partitionSize, partitionSizeTmp;
  	u32		loopNumber, loopcount;
  	struct pm8001_fw_image_header *image_hdr;
  	u32		sizeRead = 0;
  	u32		ret = 0;
  	u32		length = 1024 * 16 + sizeof(*payload) - 1;
  
  	if (pm8001_ha->fw_image->size < 28) {
  		pm8001_ha->fw_status = FAIL_FILE_SIZE;
  		return -EFAULT;
  	}
  	ioctlbuffer = kzalloc(length, GFP_KERNEL);
  	if (!ioctlbuffer) {
  		pm8001_ha->fw_status = FAIL_OUT_MEMORY;
  		return -ENOMEM;
  	}
  	image_hdr = (struct pm8001_fw_image_header *)pm8001_ha->fw_image->data;
  	while (sizeRead < pm8001_ha->fw_image->size) {
  		partitionSizeTmp =
  			*(u32 *)((u8 *)&image_hdr->image_length + sizeRead);
  		partitionSize = be32_to_cpu(partitionSizeTmp);
  		loopcount = DIV_ROUND_UP(partitionSize + HEADER_LEN,
  					IOCTL_BUF_SIZE);
  		for (loopNumber = 0; loopNumber < loopcount; loopNumber++) {
  			payload = (struct pm8001_ioctl_payload *)ioctlbuffer;
  			payload->wr_length = 1024*16;
  			payload->id = 0;
  			fwControl =
  			      (struct fw_control_info *)&payload->func_specific;
  			fwControl->len = IOCTL_BUF_SIZE;   /* IN */
  			fwControl->size = partitionSize + HEADER_LEN;/* IN */
  			fwControl->retcode = 0;/* OUT */
  			fwControl->offset = loopNumber * IOCTL_BUF_SIZE;/*OUT */
  
  		/* for the last chunk of data in case file size is not even with
  		4k, load only the rest*/
  		if (((loopcount-loopNumber) == 1) &&
  			((partitionSize + HEADER_LEN) % IOCTL_BUF_SIZE)) {
  			fwControl->len =
  				(partitionSize + HEADER_LEN) % IOCTL_BUF_SIZE;
  			memcpy((u8 *)fwControl->buffer,
  				(u8 *)pm8001_ha->fw_image->data + sizeRead,
  				(partitionSize + HEADER_LEN) % IOCTL_BUF_SIZE);
  			sizeRead +=
  				(partitionSize + HEADER_LEN) % IOCTL_BUF_SIZE;
  		} else {
  			memcpy((u8 *)fwControl->buffer,
  				(u8 *)pm8001_ha->fw_image->data + sizeRead,
  				IOCTL_BUF_SIZE);
  			sizeRead += IOCTL_BUF_SIZE;
  		}
  
  		pm8001_ha->nvmd_completion = &completion;
  		ret = PM8001_CHIP_DISP->fw_flash_update_req(pm8001_ha, payload);
  		if (ret) {
  			pm8001_ha->fw_status = FAIL_OUT_MEMORY;
  			goto out;
  		}
  		wait_for_completion(&completion);
  		if (fwControl->retcode > FLASH_UPDATE_IN_PROGRESS) {
  			pm8001_ha->fw_status = fwControl->retcode;
  			ret = -EFAULT;
  			goto out;
  		}
  		}
  	}
  out:
  	kfree(ioctlbuffer);
  	return ret;
  }
  static ssize_t pm8001_store_update_fw(struct device *cdev,
  				      struct device_attribute *attr,
  				      const char *buf, size_t count)
  {
  	struct Scsi_Host *shost = class_to_shost(cdev);
  	struct sas_ha_struct *sha = SHOST_TO_SAS_HA(shost);
  	struct pm8001_hba_info *pm8001_ha = sha->lldd_ha;
  	char *cmd_ptr, *filename_ptr;
  	int res, i;
  	int flash_command = FLASH_CMD_NONE;
  	int ret;
  
  	if (!capable(CAP_SYS_ADMIN))
  		return -EACCES;
  
  	/* this test protects us from running two flash processes at once,
  	 * so we should start with this test */
  	if (pm8001_ha->fw_status == FLASH_IN_PROGRESS)
  		return -EINPROGRESS;
  	pm8001_ha->fw_status = FLASH_IN_PROGRESS;
  
  	cmd_ptr = kcalloc(count, 2, GFP_KERNEL);
  	if (!cmd_ptr) {
  		pm8001_ha->fw_status = FAIL_OUT_MEMORY;
  		return -ENOMEM;
  	}
  
  	filename_ptr = cmd_ptr + count;
  	res = sscanf(buf, "%s %s", cmd_ptr, filename_ptr);
  	if (res != 2) {
  		pm8001_ha->fw_status = FAIL_PARAMETERS;
  		ret = -EINVAL;
  		goto out;
  	}
  
  	for (i = 0; flash_command_table[i].code != FLASH_CMD_NONE; i++) {
  		if (!memcmp(flash_command_table[i].command,
  				 cmd_ptr, strlen(cmd_ptr))) {
  			flash_command = flash_command_table[i].code;
  			break;
  		}
  	}
  	if (flash_command == FLASH_CMD_NONE) {
  		pm8001_ha->fw_status = FAIL_PARAMETERS;
  		ret = -EINVAL;
  		goto out;
  	}
  
  	ret = request_firmware(&pm8001_ha->fw_image,
  			       filename_ptr,
  			       pm8001_ha->dev);
  
  	if (ret) {
  		PM8001_FAIL_DBG(pm8001_ha,
  			pm8001_printk(
  			"Failed to load firmware image file %s,	error %d\n",
  			filename_ptr, ret));
  		pm8001_ha->fw_status = FAIL_OPEN_BIOS_FILE;
  		goto out;
  	}
  
  	if (FLASH_CMD_UPDATE == flash_command)
  		ret = pm8001_update_flash(pm8001_ha);
  	else
  		ret = pm8001_set_nvmd(pm8001_ha);
  
  	release_firmware(pm8001_ha->fw_image);
  out:
  	kfree(cmd_ptr);
  
  	if (ret)
  		return ret;
  
  	pm8001_ha->fw_status = FLASH_OK;
  	return count;
  }
  
  static ssize_t pm8001_show_update_fw(struct device *cdev,
  				     struct device_attribute *attr, char *buf)
  {
  	int i;
  	struct Scsi_Host *shost = class_to_shost(cdev);
  	struct sas_ha_struct *sha = SHOST_TO_SAS_HA(shost);
  	struct pm8001_hba_info *pm8001_ha = sha->lldd_ha;
  
  	for (i = 0; flash_error_table[i].err_code != 0; i++) {
  		if (flash_error_table[i].err_code == pm8001_ha->fw_status)
  			break;
  	}
  	if (pm8001_ha->fw_status != FLASH_IN_PROGRESS)
  		pm8001_ha->fw_status = FLASH_OK;
  
  	return snprintf(buf, PAGE_SIZE, "status=%x %s\n",
  			flash_error_table[i].err_code,
  			flash_error_table[i].reason);
  }
  
  static DEVICE_ATTR(update_fw, S_IRUGO|S_IWUSR|S_IWGRP,
  	pm8001_show_update_fw, pm8001_store_update_fw);
  struct device_attribute *pm8001_host_attrs[] = {
  	&dev_attr_interface_rev,
  	&dev_attr_controller_fatal_error,
  	&dev_attr_fw_version,
  	&dev_attr_update_fw,
  	&dev_attr_aap_log,
  	&dev_attr_iop_log,
  	&dev_attr_fatal_log,
  	&dev_attr_non_fatal_log,
  	&dev_attr_non_fatal_count,
  	&dev_attr_gsm_log,
  	&dev_attr_max_out_io,
  	&dev_attr_max_devices,
  	&dev_attr_max_sg_list,
  	&dev_attr_sas_spec_support,
  	&dev_attr_logging_level,
  	&dev_attr_event_log_size,
  	&dev_attr_host_sas_address,
  	&dev_attr_bios_version,
  	&dev_attr_ib_log,
  	&dev_attr_ob_log,
  	&dev_attr_ila_version,
  	&dev_attr_inc_fw_ver,
  	NULL,
  };
  
  