1 files changed, 11 insertions, 2 deletions

diff --git a/include/linux/libata.h b/include/linux/libata.h
index 244ff601559a..1f44cfb847e1 100644
--- a/include/linux/libata.h
+++ b/include/linux/libata.h
@@ -146,6 +146,7 @@ enum {
         ATA_DFLAG_SPUNDOWN      = (1 << 14), /* XXX: for spindown_compat */
         ATA_DFLAG_SLEEPING      = (1 << 15), /* device is sleeping */
         ATA_DFLAG_DUBIOUS_XFER  = (1 << 16), /* data transfer not verified */
+        ATA_DFLAG_NO_UNLOAD     = (1 << 17), /* device doesn't support unload */
         ATA_DFLAG_INIT_MASK     = (1 << 24) - 1,
 
         ATA_DFLAG_DETACH        = (1 << 24),
@@ -244,6 +245,7 @@ enum {
         ATA_TMOUT_BOOT          = 30000,        /* heuristic */
         ATA_TMOUT_BOOT_QUICK    =  7000,        /* heuristic */
         ATA_TMOUT_INTERNAL_QUICK = 5000,
+        ATA_TMOUT_MAX_PARK      = 30000,
 
         /* FIXME: GoVault needs 2s but we can't afford that without
          * parallel probing.  800ms is enough for iVDR disk
@@ -319,8 +321,9 @@ enum {
         ATA_EH_RESET            = ATA_EH_SOFTRESET | ATA_EH_HARDRESET,
         ATA_EH_ENABLE_LINK      = (1 << 3),
         ATA_EH_LPM              = (1 << 4),  /* link power management action */
+        ATA_EH_PARK             = (1 << 5), /* unload heads and stop I/O */
 
-        ATA_EH_PERDEV_MASK      = ATA_EH_REVALIDATE,
+        ATA_EH_PERDEV_MASK      = ATA_EH_REVALIDATE | ATA_EH_PARK,
         ATA_EH_ALL_ACTIONS      = ATA_EH_REVALIDATE | ATA_EH_RESET |
                                   ATA_EH_ENABLE_LINK | ATA_EH_LPM,
 
@@ -454,6 +457,7 @@ enum link_pm {
         MEDIUM_POWER,
 };
 extern struct device_attribute dev_attr_link_power_management_policy;
+extern struct device_attribute dev_attr_unload_heads;
 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;
@@ -566,6 +570,7 @@ struct ata_device {
         /* n_sector is used as CLEAR_OFFSET, read comment above CLEAR_OFFSET */
         u64                     n_sectors;      /* size of device, if ATA */
         unsigned int            class;          /* ATA_DEV_xxx */
+        unsigned long           unpark_deadline;
 
         u8                      pio_mode;
         u8                      dma_mode;
@@ -623,6 +628,7 @@ struct ata_eh_context {
                                                [ATA_EH_CMD_TIMEOUT_TABLE_SIZE];
         unsigned int            classes[ATA_MAX_DEVICES];
         unsigned int            did_probe_mask;
+        unsigned int            unloaded_mask;
         unsigned int            saved_ncq_enabled;
         u8                      saved_xfer_mode[ATA_MAX_DEVICES];
         /* timestamp for the last reset attempt or success */
@@ -712,6 +718,7 @@ struct ata_port {
         struct list_head        eh_done_q;
         wait_queue_head_t       eh_wait_q;
         int                     eh_tries;
+        struct completion       park_req_pending;
 
         pm_message_t            pm_mesg;
         int                     *pm_result;
@@ -1102,6 +1109,7 @@ extern void ata_std_error_handler(struct ata_port *ap);
  */
 extern const struct ata_port_operations ata_base_port_ops;
 extern const struct ata_port_operations sata_port_ops;
+extern struct device_attribute *ata_common_sdev_attrs[];
 
 #define ATA_BASE_SHT(drv_name)                                  \
         .module                 = THIS_MODULE,                  \
@@ -1116,7 +1124,8 @@ extern const struct ata_port_operations sata_port_ops;
         .proc_name              = drv_name,                     \
         .slave_configure        = ata_scsi_slave_config,        \
         .slave_destroy          = ata_scsi_slave_destroy,       \
-        .bios_param             = ata_std_bios_param
+        .bios_param             = ata_std_bios_param,           \
+        .sdev_attrs             = ata_common_sdev_attrs
 
 #define ATA_NCQ_SHT(drv_name)                                   \
         ATA_BASE_SHT(drv_name),                                 \