[libata] Link power management infrastructure

[safe/jmp/linux-2.6] / include / linux / libata.h

diff --git a/include/linux/libata.h b/include/linux/libata.h
index 439d40f..147ccc4 100644 (file)
--- a/include/linux/libata.h
+++ b/include/linux/libata.h
@@ -133,6 +133,8 @@ enum {
        ATA_DFLAG_ACPI_PENDING  = (1 << 5), /* ACPI resume action pending */
        ATA_DFLAG_ACPI_FAILED   = (1 << 6), /* ACPI on devcfg has failed */
        ATA_DFLAG_AN            = (1 << 7), /* AN configured */
+       ATA_DFLAG_HIPM          = (1 << 8), /* device supports HIPM */
+       ATA_DFLAG_DIPM          = (1 << 9), /* device supports DIPM */
        ATA_DFLAG_CFG_MASK      = (1 << 12) - 1,
 
        ATA_DFLAG_PIO           = (1 << 12), /* device limited to PIO mode */
@@ -186,6 +188,7 @@ enum {
        ATA_FLAG_ACPI_SATA      = (1 << 17), /* need native SATA ACPI layout */
        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 */
 
        /* The following flag belongs to ap->pflags but is kept in
         * ap->flags because it's referenced in many LLDs and will be
@@ -302,6 +305,7 @@ enum {
        ATA_EHI_RESUME_LINK     = (1 << 1),  /* resume link (reset modifier) */
        ATA_EHI_NO_AUTOPSY      = (1 << 2),  /* no autopsy */
        ATA_EHI_QUIET           = (1 << 3),  /* be quiet */
+       ATA_EHI_LPM             = (1 << 4),  /* link power management action */
 
        ATA_EHI_DID_SOFTRESET   = (1 << 16), /* already soft-reset this port */
        ATA_EHI_DID_HARDRESET   = (1 << 17), /* already soft-reset this port */
@@ -333,6 +337,7 @@ enum {
        ATA_HORKAGE_BROKEN_HPA  = (1 << 4),     /* Broken HPA */
        ATA_HORKAGE_SKIP_PM     = (1 << 5),     /* Skip PM operations */
        ATA_HORKAGE_HPA_SIZE    = (1 << 6),     /* native size off by one */
+       ATA_HORKAGE_IPM         = (1 << 7),     /* Link PM problems */
 
         /* DMA mask for user DMA control: User visible values; DO NOT
            renumber */
@@ -378,6 +383,18 @@ typedef int (*ata_reset_fn_t)(struct ata_link *link, unsigned int *classes,
                              unsigned long deadline);
 typedef void (*ata_postreset_fn_t)(struct ata_link *link, unsigned int *classes);
 
+/*
+ * host pm policy: If you alter this, you also need to alter libata-scsi.c
+ * (for the ascii descriptions)
+ */
+enum link_pm {
+       NOT_AVAILABLE,
+       MIN_POWER,
+       MAX_PERFORMANCE,
+       MEDIUM_POWER,
+};
+extern struct class_device_attribute class_device_attr_link_power_management_policy;
+
 struct ata_ioports {
        void __iomem            *cmd_addr;
        void __iomem            *data_addr;
@@ -624,6 +641,7 @@ struct ata_port {
 
        pm_message_t            pm_mesg;
        int                     *pm_result;
+       enum link_pm            pm_policy;
 
        struct timer_list       fastdrain_timer;
        unsigned long           fastdrain_cnt;
@@ -691,7 +709,8 @@ struct ata_port_operations {
 
        int (*port_suspend) (struct ata_port *ap, pm_message_t mesg);
        int (*port_resume) (struct ata_port *ap);
-
+       int (*enable_pm) (struct ata_port *ap, enum link_pm policy);
+       void (*disable_pm) (struct ata_port *ap);
        int (*port_start) (struct ata_port *ap);
        void (*port_stop) (struct ata_port *ap);