ide: add ide_queue_pc_head() helper

[linux-2.6-omap-h63xx.git] / include / linux / ide.h

diff --git a/include/linux/ide.h b/include/linux/ide.h
index bba2f73b99a072feadf9c2c65e01eb44b863f592..1bd49784e4da41b9573ba18fbd22aad09716a413 100644 (file)
--- a/include/linux/ide.h
+++ b/include/linux/ide.h
@@ -1121,6 +1121,22 @@ int ide_check_atapi_device(ide_drive_t *, const char *);
 
 void ide_init_pc(struct ide_atapi_pc *);
 
+/*
+ * Special requests for ide-tape block device strategy routine.
+ *
+ * In order to service a character device command, we add special requests to
+ * the tail of our block device request queue and wait for their completion.
+ */
+enum {
+       REQ_IDETAPE_PC1         = (1 << 0), /* packet command (first stage) */
+       REQ_IDETAPE_PC2         = (1 << 1), /* packet command (second stage) */
+       REQ_IDETAPE_READ        = (1 << 2),
+       REQ_IDETAPE_WRITE       = (1 << 3),
+};
+
+void ide_queue_pc_head(ide_drive_t *, struct gendisk *, struct ide_atapi_pc *,
+                      struct request *);
+
 ide_startstop_t ide_pc_intr(ide_drive_t *drive, struct ide_atapi_pc *pc,
        ide_handler_t *handler, unsigned int timeout, ide_expiry_t *expiry,
        void (*update_buffers)(ide_drive_t *, struct ide_atapi_pc *),