libata/ahci: enclosure management support

Add Enclosure Management support to libata and ahci.

Signed-off-by:  Kristen Carlson Accardi <kristen.c.accardi@intel.com>
Signed-off-by: Jeff Garzik <jgarzik@redhat.com>

1 files changed, 21 insertions, 0 deletions

diff --git a/include/linux/libata.h b/include/linux/libata.h
index 035f8e1cd0ac..5b247b8a6b3b 100644
--- a/include/linux/libata.h
+++ b/include/linux/libata.h
@@ -169,6 +169,7 @@ enum {
         ATA_LFLAG_ASSUME_CLASS  = ATA_LFLAG_ASSUME_ATA | ATA_LFLAG_ASSUME_SEMB,
         ATA_LFLAG_NO_RETRY      = (1 << 5), /* don't retry this link */
         ATA_LFLAG_DISABLED      = (1 << 6), /* link is disabled */
+        ATA_LFLAG_SW_ACTIVITY   = (1 << 7), /* keep activity stats */
 
         /* struct ata_port flags */
         ATA_FLAG_SLAVE_POSS     = (1 << 0), /* host supports slave dev */
@@ -191,6 +192,10 @@ enum {
         ATA_FLAG_AN             = (1 << 18), /* controller supports AN */
         ATA_FLAG_PMP            = (1 << 19), /* controller supports PMP */
         ATA_FLAG_IPM            = (1 << 20), /* driver can handle IPM */
+        ATA_FLAG_EM             = (1 << 21), /* driver supports enclosure
+                                              * management */
+        ATA_FLAG_SW_ACTIVITY    = (1 << 22), /* driver supports sw activity
+                                              * led */
 
         /* The following flag belongs to ap->pflags but is kept in
          * ap->flags because it's referenced in many LLDs and will be
@@ -446,6 +451,15 @@ enum link_pm {
         MEDIUM_POWER,
 };
 extern struct device_attribute dev_attr_link_power_management_policy;
+extern struct device_attribute dev_attr_em_message_type;
+extern struct device_attribute dev_attr_em_message;
+extern struct device_attribute dev_attr_sw_activity;
+
+enum sw_activity {
+        OFF,
+        BLINK_ON,
+        BLINK_OFF,
+};
 
 #ifdef CONFIG_ATA_SFF
 struct ata_ioports {
@@ -701,6 +715,7 @@ struct ata_port {
         struct timer_list       fastdrain_timer;
         unsigned long           fastdrain_cnt;
 
+        int                     em_message_type;
         void                    *private_data;
 
 #ifdef CONFIG_ATA_ACPI
@@ -792,6 +807,12 @@ struct ata_port_operations {
         u8   (*bmdma_status)(struct ata_port *ap);
 #endif /* CONFIG_ATA_SFF */
 
+        ssize_t (*em_show)(struct ata_port *ap, char *buf);
+        ssize_t (*em_store)(struct ata_port *ap, const char *message,
+                            size_t size);
+        ssize_t (*sw_activity_show)(struct ata_device *dev, char *buf);
+        ssize_t (*sw_activity_store)(struct ata_device *dev,
+                                     enum sw_activity val);
         /*
          * Obsolete
          */