[SCSI] qla2xxx: Add VPD sysfs attribute.

Signed-off-by: Andrew Vasquez <andrew.vasquez@qlogic.com>
Signed-off-by: James Bottomley <James.Bottomley@SteelEye.com>

1 files changed, 57 insertions, 0 deletions

diff --git a/drivers/scsi/qla2xxx/qla_attr.c b/drivers/scsi/qla2xxx/qla_attr.c
index 2b9e329a240c..488b3d16427b 100644
--- a/drivers/scsi/qla2xxx/qla_attr.c
+++ b/drivers/scsi/qla2xxx/qla_attr.c
@@ -308,6 +308,61 @@ static struct bin_attribute sysfs_optrom_ctl_attr = {
         .write = qla2x00_sysfs_write_optrom_ctl,
 };
 
+static ssize_t
+qla2x00_sysfs_read_vpd(struct kobject *kobj, char *buf, loff_t off,
+    size_t count)
+{
+        struct scsi_qla_host *ha = to_qla_host(dev_to_shost(container_of(kobj,
+            struct device, kobj)));
+        unsigned long flags;
+
+        if (!capable(CAP_SYS_ADMIN) || off != 0)
+                return 0;
+
+        if (!IS_QLA24XX(ha) && !IS_QLA54XX(ha))
+                return -ENOTSUPP;
+
+        /* Read NVRAM. */
+        spin_lock_irqsave(&ha->hardware_lock, flags);
+        ha->isp_ops.read_nvram(ha, (uint8_t *)buf, ha->vpd_base, ha->vpd_size);
+        spin_unlock_irqrestore(&ha->hardware_lock, flags);
+
+        return ha->vpd_size;
+}
+
+static ssize_t
+qla2x00_sysfs_write_vpd(struct kobject *kobj, char *buf, loff_t off,
+    size_t count)
+{
+        struct scsi_qla_host *ha = to_qla_host(dev_to_shost(container_of(kobj,
+            struct device, kobj)));
+        unsigned long flags;
+
+        if (!capable(CAP_SYS_ADMIN) || off != 0 || count != ha->vpd_size)
+                return 0;
+
+        if (!IS_QLA24XX(ha) && !IS_QLA54XX(ha))
+                return -ENOTSUPP;
+
+        /* Write NVRAM. */
+        spin_lock_irqsave(&ha->hardware_lock, flags);
+        ha->isp_ops.write_nvram(ha, (uint8_t *)buf, ha->vpd_base, count);
+        spin_unlock_irqrestore(&ha->hardware_lock, flags);
+
+        return count;
+}
+
+static struct bin_attribute sysfs_vpd_attr = {
+        .attr = {
+                .name = "vpd",
+                .mode = S_IRUSR | S_IWUSR,
+                .owner = THIS_MODULE,
+        },
+        .size = 0,
+        .read = qla2x00_sysfs_read_vpd,
+        .write = qla2x00_sysfs_write_vpd,
+};
+
 void
 qla2x00_alloc_sysfs_attr(scsi_qla_host_t *ha)
 {
@@ -318,6 +373,7 @@ qla2x00_alloc_sysfs_attr(scsi_qla_host_t *ha)
         sysfs_create_bin_file(&host->shost_gendev.kobj, &sysfs_optrom_attr);
         sysfs_create_bin_file(&host->shost_gendev.kobj,
             &sysfs_optrom_ctl_attr);
+        sysfs_create_bin_file(&host->shost_gendev.kobj, &sysfs_vpd_attr);
 }
 
 void
@@ -330,6 +386,7 @@ qla2x00_free_sysfs_attr(scsi_qla_host_t *ha)
         sysfs_remove_bin_file(&host->shost_gendev.kobj, &sysfs_optrom_attr);
         sysfs_remove_bin_file(&host->shost_gendev.kobj,
             &sysfs_optrom_ctl_attr);
+        sysfs_remove_bin_file(&host->shost_gendev.kobj, &sysfs_vpd_attr);
 
         if (ha->beacon_blink_led == 1)
                 ha->isp_ops.beacon_off(ha);