[SCSI] qla2xxx: Retrieve board serial-number and description from VPD.

Recent ISPs have this information written at manufacturing time,
so use the information.  This also reduces future churn of the
qla_devtbl.h file contents, as the driver can now depend on the
information to be present in VPD.

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

1 files changed, 45 insertions, 0 deletions

diff --git a/drivers/scsi/qla2xxx/qla_sup.c b/drivers/scsi/qla2xxx/qla_sup.c
index ebea62246c80..1bca74474935 100644
--- a/drivers/scsi/qla2xxx/qla_sup.c
+++ b/drivers/scsi/qla2xxx/qla_sup.c
@@ -2303,6 +2303,51 @@ qla24xx_get_flash_version(scsi_qla_host_t *ha, void *mbuf)
 }
 
 static int
+qla2xxx_is_vpd_valid(uint8_t *pos, uint8_t *end)
+{
+        if (pos >= end || *pos != 0x82)
+                return 0;
+
+        pos += 3 + pos[1];
+        if (pos >= end || *pos != 0x90)
+                return 0;
+
+        pos += 3 + pos[1];
+        if (pos >= end || *pos != 0x78)
+                return 0;
+
+        return 1;
+}
+
+int
+qla2xxx_get_vpd_field(scsi_qla_host_t *ha, char *key, char *str, size_t size)
+{
+        uint8_t *pos = ha->vpd;
+        uint8_t *end = pos + ha->vpd_size;
+        int len = 0;
+
+        if (!IS_FWI2_CAPABLE(ha) || !qla2xxx_is_vpd_valid(pos, end))
+                return 0;
+
+        while (pos < end && *pos != 0x78) {
+                len = (*pos == 0x82) ? pos[1] : pos[2];
+
+                if (!strncmp(pos, key, strlen(key)))
+                        break;
+
+                if (*pos != 0x90 && *pos != 0x91)
+                        pos += len;
+
+                pos += 3;
+        }
+
+        if (pos < end - len && *pos != 0x78)
+                return snprintf(str, size, "%.*s", len, pos + 3);
+
+        return 0;
+}
+
+static int
 qla2xxx_hw_event_store(scsi_qla_host_t *ha, uint32_t *fdata)
 {
         uint32_t d[2], faddr;