Merge tag 'v2.6.38' of git://git.kernel.org/pub/scm/linux/kernel/git/torvalds/linux-2.6

[mv-sheeva.git] / include / drm / ttm / ttm_bo_api.h

diff --git a/include/drm/ttm/ttm_bo_api.h b/include/drm/ttm/ttm_bo_api.h
index beafc156a5353259d6b077ca57b2dd13af39f48d..50852aad260a2854a9e5bd0f9e9daffb1fc4ae7b 100644 (file)
--- a/include/drm/ttm/ttm_bo_api.h
+++ b/include/drm/ttm/ttm_bo_api.h
@@ -74,6 +74,8 @@ struct ttm_placement {
  * @is_iomem:          is this io memory ?
  * @size:              size in byte
  * @offset:            offset from the base address
+ * @io_reserved_vm:     The VM system has a refcount in @io_reserved_count
+ * @io_reserved_count:  Refcounting the numbers of callers to ttm_mem_io_reserve
  *
  * Structure indicating the bus placement of an object.
  */
@@ -83,7 +85,8 @@ struct ttm_bus_placement {
        unsigned long   size;
        unsigned long   offset;
        bool            is_iomem;
-       bool            io_reserved;
+       bool            io_reserved_vm;
+       uint64_t        io_reserved_count;
 };
 
 
@@ -154,7 +157,6 @@ struct ttm_tt;
  * keeps one refcount. When this refcount reaches zero,
  * the object is destroyed.
  * @event_queue: Queue for processes waiting on buffer object status change.
- * @lock: spinlock protecting mostly synchronization members.
  * @mem: structure describing current placement.
  * @persistant_swap_storage: Usually the swap storage is deleted for buffers
  * pinned in physical memory. If this behaviour is not desired, this member
@@ -213,7 +215,6 @@ struct ttm_buffer_object {
        struct kref kref;
        struct kref list_kref;
        wait_queue_head_t event_queue;
-       spinlock_t lock;
 
        /**
         * Members protected by the bo::reserved lock.
@@ -237,6 +238,7 @@ struct ttm_buffer_object {
        struct list_head lru;
        struct list_head ddestroy;
        struct list_head swap;
+       struct list_head io_reserve_lru;
        uint32_t val_seq;
        bool seq_valid;
 
@@ -248,10 +250,10 @@ struct ttm_buffer_object {
        atomic_t reserved;
 
        /**
-        * Members protected by the bo::lock
+        * Members protected by struct buffer_object_device::fence_lock
         * In addition, setting sync_obj to anything else
         * than NULL requires bo::reserved to be held. This allows for
-        * checking NULL while reserved but not holding bo::lock.
+        * checking NULL while reserved but not holding the mentioned lock.
         */
 
        void *sync_obj_arg;
@@ -364,6 +366,44 @@ extern int ttm_bo_validate(struct ttm_buffer_object *bo,
  */
 extern void ttm_bo_unref(struct ttm_buffer_object **bo);
 
+
+/**
+ * ttm_bo_list_ref_sub
+ *
+ * @bo: The buffer object.
+ * @count: The number of references with which to decrease @bo::list_kref;
+ * @never_free: The refcount should not reach zero with this operation.
+ *
+ * Release @count lru list references to this buffer object.
+ */
+extern void ttm_bo_list_ref_sub(struct ttm_buffer_object *bo, int count,
+                               bool never_free);
+
+/**
+ * ttm_bo_add_to_lru
+ *
+ * @bo: The buffer object.
+ *
+ * Add this bo to the relevant mem type lru and, if it's backed by
+ * system pages (ttms) to the swap list.
+ * This function must be called with struct ttm_bo_global::lru_lock held, and
+ * is typically called immediately prior to unreserving a bo.
+ */
+extern void ttm_bo_add_to_lru(struct ttm_buffer_object *bo);
+
+/**
+ * ttm_bo_del_from_lru
+ *
+ * @bo: The buffer object.
+ *
+ * Remove this bo from all lru lists used to lookup and reserve an object.
+ * This function must be called with struct ttm_bo_global::lru_lock held,
+ * and is usually called just immediately after the bo has been reserved to
+ * avoid recursive reservation from lru lists.
+ */
+extern int ttm_bo_del_from_lru(struct ttm_buffer_object *bo);
+
+
 /**
  * ttm_bo_lock_delayed_workqueue
  *