ahci: EM message type auto detect

Detect enclosure management message type automatically at driver
initialization, instead of using module parameter "ahci_em_messages".

Signed-off-by: Harry Zhang <harry.zhang@amd.com>
Signed-off-by: Jeff Garzik <jgarzik@redhat.com>

1 files changed, 7 insertions, 1 deletions

diff --git a/drivers/ata/ahci.h b/drivers/ata/ahci.h
index 733def27df07..5edce4447d84 100644
--- a/drivers/ata/ahci.h
+++ b/drivers/ata/ahci.h
@@ -227,6 +227,12 @@ enum {
         EM_CTL_RST                      = (1 << 9), /* Reset */
         EM_CTL_TM                       = (1 << 8), /* Transmit Message */
         EM_CTL_ALHD                     = (1 << 26), /* Activity LED */
+
+        /* em message type */
+        EM_MSG_TYPE_LED         = (1 << 0), /* LED */
+        EM_MSG_TYPE_SAFTE       = (1 << 1), /* SAF-TE */
+        EM_MSG_TYPE_SES2        = (1 << 2), /* SES-2 */
+        EM_MSG_TYPE_SGPIO       = (1 << 3), /* SGPIO */
 };
 
 struct ahci_cmd_hdr {
@@ -282,9 +288,9 @@ struct ahci_host_priv {
         u32                     saved_cap2;     /* saved initial cap2 */
         u32                     saved_port_map; /* saved initial port_map */
         u32                     em_loc; /* enclosure management location */
+        u32                     em_msg_type;    /* EM message type */
 };
 
-extern int ahci_em_messages;
 extern int ahci_ignore_sss;
 
 extern struct scsi_host_template ahci_sht;