[SCSI] pm80xx: Display controller BIOS version.

Signed-off-by: Anandkumar.Santhanam@pmcs.com
Reviewed-by: Jack Wang <jinpu.wang@profitbricks.com>
Signed-off-by: James Bottomley <JBottomley@Parallels.com>

2 files changed, 36 insertions, 0 deletions

diff --git a/drivers/scsi/pm8001/pm8001_ctl.c b/drivers/scsi/pm8001/pm8001_ctl.c
index d99f41c2ca13..5a19e1930b4b 100644
--- a/drivers/scsi/pm8001/pm8001_ctl.c
+++ b/drivers/scsi/pm8001/pm8001_ctl.c
@@ -309,6 +309,39 @@ static ssize_t pm8001_ctl_aap_log_show(struct device *cdev,
 }
 static DEVICE_ATTR(aap_log, S_IRUGO, pm8001_ctl_aap_log_show, NULL);
 /**
+ * pm8001_ctl_bios_version_show - Bios version Display
+ * @cdev:pointer to embedded class device
+ * @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;
+        void *virt_addr;
+        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.length = 4096;
+        payload.func_specific = kzalloc(4096, GFP_KERNEL);
+        PM8001_CHIP_DISP->get_nvmd_req(pm8001_ha, &payload);
+        wait_for_completion(&completion);
+        virt_addr = pm8001_ha->memoryMap.region[NVMD].virt_ptr;
+        for (bios_index = BIOSOFFSET; bios_index < BIOS_OFFSET_LIMIT;
+                bios_index++)
+                str += sprintf(str, "%c",
+                        *((u8 *)((u8 *)virt_addr+bios_index)));
+        return str - buf;
+}
+static DEVICE_ATTR(bios_version, S_IRUGO, pm8001_ctl_bios_version_show, NULL);
+/**
  * pm8001_ctl_aap_log_show - IOP event log
  * @cdev: pointer to embedded class device
  * @buf: the buffer returned
@@ -609,6 +642,7 @@ struct device_attribute *pm8001_host_attrs[] = {
         &dev_attr_sas_spec_support,
         &dev_attr_logging_level,
         &dev_attr_host_sas_address,
+        &dev_attr_bios_version,
         NULL,
 };
 
diff --git a/drivers/scsi/pm8001/pm8001_ctl.h b/drivers/scsi/pm8001/pm8001_ctl.h
index 63ad4aa0c422..c6d8fdd3b9b9 100644
--- a/drivers/scsi/pm8001/pm8001_ctl.h
+++ b/drivers/scsi/pm8001/pm8001_ctl.h
@@ -45,6 +45,8 @@
 #define HEADER_LEN                      28
 #define SIZE_OFFSET                     16
 
+#define BIOSOFFSET                      56
+#define BIOS_OFFSET_LIMIT               61
 
 #define FLASH_OK                        0x000000
 #define FAIL_OPEN_BIOS_FILE             0x000100