1 files changed, 13 insertions, 0 deletions

diff --git a/include/linux/ide.h b/include/linux/ide.h
index 8247b286838d..c47e371554c1 100644
--- a/include/linux/ide.h
+++ b/include/linux/ide.h
@@ -156,6 +156,8 @@ enum {
  */
 #define REQ_DRIVE_RESET         0x20
 #define REQ_DEVSET_EXEC         0x21
+#define REQ_PARK_HEADS          0x22
+#define REQ_UNPARK_HEADS        0x23
 
 /*
  * Check for an interrupt and acknowledge the interrupt status
@@ -573,6 +575,10 @@ enum {
         /* retrying in PIO */
         IDE_DFLAG_DMA_PIO_RETRY         = (1 << 25),
         IDE_DFLAG_LBA                   = (1 << 26),
+        /* don't unload heads */
+        IDE_DFLAG_NO_UNLOAD             = (1 << 27),
+        /* heads unloaded, please don't reset port */
+        IDE_DFLAG_PARKED                = (1 << 28)
 };
 
 struct ide_drive_s {
@@ -1207,6 +1213,13 @@ int ide_check_atapi_device(ide_drive_t *, const char *);
 
 void ide_init_pc(struct ide_atapi_pc *);
 
+/* Disk head parking */
+extern wait_queue_head_t ide_park_wq;
+ssize_t ide_park_show(struct device *dev, struct device_attribute *attr,
+                      char *buf);
+ssize_t ide_park_store(struct device *dev, struct device_attribute *attr,
+                       const char *buf, size_t len);
+
 /*
  * Special requests for ide-tape block device strategy routine.
  *