dma-buf: Rename struct fence to dma_fence

I plan to usurp the short name of struct fence for a core kernel struct,
and so I need to rename the specialised fence/timeline for DMA
operations to make room.

A consensus was reached in
https://lists.freedesktop.org/archives/dri-devel/2016-July/113083.html
that making clear this fence applies to DMA operations was a good thing.
Since then the patch has grown a bit as usage increases, so hopefully it
remains a good thing!

(v2...: rebase, rerun spatch)
v3: Compile on msm, spotted a manual fixup that I broke.
v4: Try again for msm, sorry Daniel

coccinelle script:
@@

@@
- struct fence
+ struct dma_fence
@@

@@
- struct fence_ops
+ struct dma_fence_ops
@@

@@
- struct fence_cb
+ struct dma_fence_cb
@@

@@
- struct fence_array
+ struct dma_fence_array
@@

@@
- enum fence_flag_bits
+ enum dma_fence_flag_bits
@@

@@
(
- fence_init
+ dma_fence_init
|
- fence_release
+ dma_fence_release
|
- fence_free
+ dma_fence_free
|
- fence_get
+ dma_fence_get
|
- fence_get_rcu
+ dma_fence_get_rcu
|
- fence_put
+ dma_fence_put
|
- fence_signal
+ dma_fence_signal
|
- fence_signal_locked
+ dma_fence_signal_locked
|
- fence_default_wait
+ dma_fence_default_wait
|
- fence_add_callback
+ dma_fence_add_callback
|
- fence_remove_callback
+ dma_fence_remove_callback
|
- fence_enable_sw_signaling
+ dma_fence_enable_sw_signaling
|
- fence_is_signaled_locked
+ dma_fence_is_signaled_locked
|
- fence_is_signaled
+ dma_fence_is_signaled
|
- fence_is_later
+ dma_fence_is_later
|
- fence_later
+ dma_fence_later
|
- fence_wait_timeout
+ dma_fence_wait_timeout
|
- fence_wait_any_timeout
+ dma_fence_wait_any_timeout
|
- fence_wait
+ dma_fence_wait
|
- fence_context_alloc
+ dma_fence_context_alloc
|
- fence_array_create
+ dma_fence_array_create
|
- to_fence_array
+ to_dma_fence_array
|
- fence_is_array
+ dma_fence_is_array
|
- trace_fence_emit
+ trace_dma_fence_emit
|
- FENCE_TRACE
+ DMA_FENCE_TRACE
|
- FENCE_WARN
+ DMA_FENCE_WARN
|
- FENCE_ERR
+ DMA_FENCE_ERR
)
 (
 ...
 )

Signed-off-by: Chris Wilson <chris@chris-wilson.co.uk>
Reviewed-by: Gustavo Padovan <gustavo.padovan@collabora.co.uk>
Acked-by: Sumit Semwal <sumit.semwal@linaro.org>
Acked-by: Christian König <christian.koenig@amd.com>
Signed-off-by: Daniel Vetter <daniel.vetter@ffwll.ch>
Link: http://patchwork.freedesktop.org/patch/msgid/20161025120045.28839-1-chris@chris-wilson.co.uk

14 files changed, 275 insertions, 260 deletions

diff --git a/include/drm/drmP.h b/include/drm/drmP.h
index 672644031bd5..e336e3901876 100644
--- a/include/drm/drmP.h
+++ b/include/drm/drmP.h
@@ -57,7 +57,7 @@
 #include <linux/types.h>
 #include <linux/vmalloc.h>
 #include <linux/workqueue.h>
-#include <linux/fence.h>
+#include <linux/dma-fence.h>
 
 #include <asm/mman.h>
 #include <asm/pgalloc.h>
@@ -362,7 +362,7 @@ struct drm_ioctl_desc {
 struct drm_pending_event {
 	struct completion *completion;
 	struct drm_event *event;
-	struct fence *fence;
+	struct dma_fence *fence;
 	struct list_head link;
 	struct list_head pending_link;
 	struct drm_file *file_priv;
diff --git a/include/drm/drm_crtc.h b/include/drm/drm_crtc.h
index bc860cfc67ca..fa1aa214c8ea 100644
--- a/include/drm/drm_crtc.h
+++ b/include/drm/drm_crtc.h
@@ -54,7 +54,7 @@ struct drm_mode_set;
 struct drm_file;
 struct drm_clip_rect;
 struct device_node;
-struct fence;
+struct dma_fence;
 struct edid;
 
 static inline int64_t U642I64(uint64_t val)
diff --git a/include/drm/drm_plane.h b/include/drm/drm_plane.h
index 98b39d66eb32..c5e8a0df1623 100644
--- a/include/drm/drm_plane.h
+++ b/include/drm/drm_plane.h
@@ -59,7 +59,7 @@ struct drm_plane_state {
 
 	struct drm_crtc *crtc;   /* do not write directly, use drm_atomic_set_crtc_for_plane() */
 	struct drm_framebuffer *fb;  /* do not write directly, use drm_atomic_set_fb_for_plane() */
-	struct fence *fence;
+	struct dma_fence *fence;
 
 	/* Signed dest location allows it to be partially off screen */
 	int32_t crtc_x, crtc_y;
diff --git a/include/drm/ttm/ttm_bo_api.h b/include/drm/ttm/ttm_bo_api.h
index 9eb940d6755f..5beae7969bf7 100644
--- a/include/drm/ttm/ttm_bo_api.h
+++ b/include/drm/ttm/ttm_bo_api.h
@@ -209,7 +209,7 @@ struct ttm_buffer_object {
 	 * Members protected by a bo reservation.
 	 */
 
-	struct fence *moving;
+	struct dma_fence *moving;
 
 	struct drm_vma_offset_node vma_node;
 
diff --git a/include/drm/ttm/ttm_bo_driver.h b/include/drm/ttm/ttm_bo_driver.h
index 4f0a92185995..27e9c26c9150 100644
--- a/include/drm/ttm/ttm_bo_driver.h
+++ b/include/drm/ttm/ttm_bo_driver.h
@@ -303,7 +303,7 @@ struct ttm_mem_type_manager {
 	/*
 	 * Protected by @move_lock.
 	 */
-	struct fence *move;
+	struct dma_fence *move;
 };
 
 /**
@@ -1025,7 +1025,7 @@ extern void ttm_bo_free_old_node(struct ttm_buffer_object *bo);
  */
 
 extern int ttm_bo_move_accel_cleanup(struct ttm_buffer_object *bo,
-				     struct fence *fence, bool evict,
+				     struct dma_fence *fence, bool evict,
 				     struct ttm_mem_reg *new_mem);
 
 /**
@@ -1040,7 +1040,7 @@ extern int ttm_bo_move_accel_cleanup(struct ttm_buffer_object *bo,
  * immediately or hang it on a temporary buffer object.
  */
 int ttm_bo_pipeline_move(struct ttm_buffer_object *bo,
-			 struct fence *fence, bool evict,
+			 struct dma_fence *fence, bool evict,
 			 struct ttm_mem_reg *new_mem);
 
 /**
diff --git a/include/drm/ttm/ttm_execbuf_util.h b/include/drm/ttm/ttm_execbuf_util.h
index b620c317c772..47f35b8e6d09 100644
--- a/include/drm/ttm/ttm_execbuf_util.h
+++ b/include/drm/ttm/ttm_execbuf_util.h
@@ -114,6 +114,6 @@ extern int ttm_eu_reserve_buffers(struct ww_acquire_ctx *ticket,
 
 extern void ttm_eu_fence_buffer_objects(struct ww_acquire_ctx *ticket,
 					struct list_head *list,
-					struct fence *fence);
+					struct dma_fence *fence);
 
 #endif
diff --git a/include/linux/dma-buf.h b/include/linux/dma-buf.h
index e0b0741ae671..8daeb3ce0016 100644
--- a/include/linux/dma-buf.h
+++ b/include/linux/dma-buf.h
@@ -30,7 +30,7 @@
 #include <linux/list.h>
 #include <linux/dma-mapping.h>
 #include <linux/fs.h>
-#include <linux/fence.h>
+#include <linux/dma-fence.h>
 #include <linux/wait.h>
 
 struct device;
@@ -143,7 +143,7 @@ struct dma_buf {
 	wait_queue_head_t poll;
 
 	struct dma_buf_poll_cb_t {
-		struct fence_cb cb;
+		struct dma_fence_cb cb;
 		wait_queue_head_t *poll;
 
 		unsigned long active;
diff --git a/include/linux/dma-fence-array.h b/include/linux/dma-fence-array.h
new file mode 100644
index 000000000000..5900945f962d
--- /dev/null
+++ b/include/linux/dma-fence-array.h
@@ -0,0 +1,86 @@
+/*
+ * fence-array: aggregates fence to be waited together
+ *
+ * Copyright (C) 2016 Collabora Ltd
+ * Copyright (C) 2016 Advanced Micro Devices, Inc.
+ * Authors:
+ *	Gustavo Padovan <gustavo@padovan.org>
+ *	Christian König <christian.koenig@amd.com>
+ *
+ * This program is free software; you can redistribute it and/or modify it
+ * under the terms of the GNU General Public License version 2 as published by
+ * the Free Software Foundation.
+ *
+ * This program is distributed in the hope that it will be useful, but WITHOUT
+ * ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or
+ * FITNESS FOR A PARTICULAR PURPOSE.  See the GNU General Public License for
+ * more details.
+ */
+
+#ifndef __LINUX_DMA_FENCE_ARRAY_H
+#define __LINUX_DMA_FENCE_ARRAY_H
+
+#include <linux/dma-fence.h>
+
+/**
+ * struct dma_fence_array_cb - callback helper for fence array
+ * @cb: fence callback structure for signaling
+ * @array: reference to the parent fence array object
+ */
+struct dma_fence_array_cb {
+	struct dma_fence_cb cb;
+	struct dma_fence_array *array;
+};
+
+/**
+ * struct dma_fence_array - fence to represent an array of fences
+ * @base: fence base class
+ * @lock: spinlock for fence handling
+ * @num_fences: number of fences in the array
+ * @num_pending: fences in the array still pending
+ * @fences: array of the fences
+ */
+struct dma_fence_array {
+	struct dma_fence base;
+
+	spinlock_t lock;
+	unsigned num_fences;
+	atomic_t num_pending;
+	struct dma_fence **fences;
+};
+
+extern const struct dma_fence_ops dma_fence_array_ops;
+
+/**
+ * dma_fence_is_array - check if a fence is from the array subsclass
+ * @fence: fence to test
+ *
+ * Return true if it is a dma_fence_array and false otherwise.
+ */
+static inline bool dma_fence_is_array(struct dma_fence *fence)
+{
+	return fence->ops == &dma_fence_array_ops;
+}
+
+/**
+ * to_dma_fence_array - cast a fence to a dma_fence_array
+ * @fence: fence to cast to a dma_fence_array
+ *
+ * Returns NULL if the fence is not a dma_fence_array,
+ * or the dma_fence_array otherwise.
+ */
+static inline struct dma_fence_array *
+to_dma_fence_array(struct dma_fence *fence)
+{
+	if (fence->ops != &dma_fence_array_ops)
+		return NULL;
+
+	return container_of(fence, struct dma_fence_array, base);
+}
+
+struct dma_fence_array *dma_fence_array_create(int num_fences,
+					       struct dma_fence **fences,
+					       u64 context, unsigned seqno,
+					       bool signal_on_any);
+
+#endif /* __LINUX_DMA_FENCE_ARRAY_H */
diff --git a/include/linux/fence.h b/include/linux/dma-fence.h
index c9c5ba98c302..ba60c043a5d3 100644
--- a/include/linux/fence.h
+++ b/include/linux/dma-fence.h
@@ -18,8 +18,8 @@
  * more details.
  */
 
-#ifndef __LINUX_FENCE_H
-#define __LINUX_FENCE_H
+#ifndef __LINUX_DMA_FENCE_H
+#define __LINUX_DMA_FENCE_H
 
 #include <linux/err.h>
 #include <linux/wait.h>
@@ -30,48 +30,48 @@
 #include <linux/printk.h>
 #include <linux/rcupdate.h>
 
-struct fence;
-struct fence_ops;
-struct fence_cb;
+struct dma_fence;
+struct dma_fence_ops;
+struct dma_fence_cb;
 
 /**
- * struct fence - software synchronization primitive
+ * struct dma_fence - software synchronization primitive
  * @refcount: refcount for this fence
- * @ops: fence_ops associated with this fence
+ * @ops: dma_fence_ops associated with this fence
  * @rcu: used for releasing fence with kfree_rcu
  * @cb_list: list of all callbacks to call
  * @lock: spin_lock_irqsave used for locking
  * @context: execution context this fence belongs to, returned by
- *           fence_context_alloc()
+ *           dma_fence_context_alloc()
  * @seqno: the sequence number of this fence inside the execution context,
  * can be compared to decide which fence would be signaled later.
- * @flags: A mask of FENCE_FLAG_* defined below
+ * @flags: A mask of DMA_FENCE_FLAG_* defined below
  * @timestamp: Timestamp when the fence was signaled.
  * @status: Optional, only valid if < 0, must be set before calling
- * fence_signal, indicates that the fence has completed with an error.
+ * dma_fence_signal, indicates that the fence has completed with an error.
  *
  * the flags member must be manipulated and read using the appropriate
  * atomic ops (bit_*), so taking the spinlock will not be needed most
  * of the time.
  *
- * FENCE_FLAG_SIGNALED_BIT - fence is already signaled
- * FENCE_FLAG_ENABLE_SIGNAL_BIT - enable_signaling might have been called*
- * FENCE_FLAG_USER_BITS - start of the unused bits, can be used by the
+ * DMA_FENCE_FLAG_SIGNALED_BIT - fence is already signaled
+ * DMA_FENCE_FLAG_ENABLE_SIGNAL_BIT - enable_signaling might have been called
+ * DMA_FENCE_FLAG_USER_BITS - start of the unused bits, can be used by the
  * implementer of the fence for its own purposes. Can be used in different
  * ways by different fence implementers, so do not rely on this.
  *
  * Since atomic bitops are used, this is not guaranteed to be the case.
- * Particularly, if the bit was set, but fence_signal was called right
+ * Particularly, if the bit was set, but dma_fence_signal was called right
  * before this bit was set, it would have been able to set the
- * FENCE_FLAG_SIGNALED_BIT, before enable_signaling was called.
- * Adding a check for FENCE_FLAG_SIGNALED_BIT after setting
- * FENCE_FLAG_ENABLE_SIGNAL_BIT closes this race, and makes sure that
- * after fence_signal was called, any enable_signaling call will have either
+ * DMA_FENCE_FLAG_SIGNALED_BIT, before enable_signaling was called.
+ * Adding a check for DMA_FENCE_FLAG_SIGNALED_BIT after setting
+ * DMA_FENCE_FLAG_ENABLE_SIGNAL_BIT closes this race, and makes sure that
+ * after dma_fence_signal was called, any enable_signaling call will have either
  * been completed, or never called at all.
  */
-struct fence {
+struct dma_fence {
 	struct kref refcount;
-	const struct fence_ops *ops;
+	const struct dma_fence_ops *ops;
 	struct rcu_head rcu;
 	struct list_head cb_list;
 	spinlock_t *lock;
@@ -82,34 +82,35 @@ struct fence {
 	int status;
 };
 
-enum fence_flag_bits {
-	FENCE_FLAG_SIGNALED_BIT,
-	FENCE_FLAG_ENABLE_SIGNAL_BIT,
-	FENCE_FLAG_USER_BITS, /* must always be last member */
+enum dma_fence_flag_bits {
+	DMA_FENCE_FLAG_SIGNALED_BIT,
+	DMA_FENCE_FLAG_ENABLE_SIGNAL_BIT,
+	DMA_FENCE_FLAG_USER_BITS, /* must always be last member */
 };
 
-typedef void (*fence_func_t)(struct fence *fence, struct fence_cb *cb);
+typedef void (*dma_fence_func_t)(struct dma_fence *fence,
+				 struct dma_fence_cb *cb);
 
 /**
- * struct fence_cb - callback for fence_add_callback
- * @node: used by fence_add_callback to append this struct to fence::cb_list
- * @func: fence_func_t to call
+ * struct dma_fence_cb - callback for dma_fence_add_callback
+ * @node: used by dma_fence_add_callback to append this struct to fence::cb_list
+ * @func: dma_fence_func_t to call
  *
- * This struct will be initialized by fence_add_callback, additional
- * data can be passed along by embedding fence_cb in another struct.
+ * This struct will be initialized by dma_fence_add_callback, additional
+ * data can be passed along by embedding dma_fence_cb in another struct.
  */
-struct fence_cb {
+struct dma_fence_cb {
 	struct list_head node;
-	fence_func_t func;
+	dma_fence_func_t func;
 };
 
 /**
- * struct fence_ops - operations implemented for fence
+ * struct dma_fence_ops - operations implemented for fence
  * @get_driver_name: returns the driver name.
  * @get_timeline_name: return the name of the context this fence belongs to.
  * @enable_signaling: enable software signaling of fence.
  * @signaled: [optional] peek whether the fence is signaled, can be null.
- * @wait: custom wait implementation, or fence_default_wait.
+ * @wait: custom wait implementation, or dma_fence_default_wait.
  * @release: [optional] called on destruction of fence, can be null
  * @fill_driver_data: [optional] callback to fill in free-form debug info
  * Returns amount of bytes filled, or -errno.
@@ -135,20 +136,20 @@ struct fence_cb {
  * fence->status may be set in enable_signaling, but only when false is
  * returned.
  *
- * Calling fence_signal before enable_signaling is called allows
+ * Calling dma_fence_signal before enable_signaling is called allows
  * for a tiny race window in which enable_signaling is called during,
- * before, or after fence_signal. To fight this, it is recommended
+ * before, or after dma_fence_signal. To fight this, it is recommended
  * that before enable_signaling returns true an extra reference is
  * taken on the fence, to be released when the fence is signaled.
- * This will mean fence_signal will still be called twice, but
+ * This will mean dma_fence_signal will still be called twice, but
  * the second time will be a noop since it was already signaled.
  *
  * Notes on signaled:
  * May set fence->status if returning true.
  *
  * Notes on wait:
- * Must not be NULL, set to fence_default_wait for default implementation.
- * the fence_default_wait implementation should work for any fence, as long
+ * Must not be NULL, set to dma_fence_default_wait for default implementation.
+ * the dma_fence_default_wait implementation should work for any fence, as long
  * as enable_signaling works correctly.
  *
  * Must return -ERESTARTSYS if the wait is intr = true and the wait was
@@ -163,42 +164,44 @@ struct fence_cb {
  * If pointer is set to NULL, kfree will get called instead.
  */
 
-struct fence_ops {
-	const char * (*get_driver_name)(struct fence *fence);
-	const char * (*get_timeline_name)(struct fence *fence);
-	bool (*enable_signaling)(struct fence *fence);
-	bool (*signaled)(struct fence *fence);
-	signed long (*wait)(struct fence *fence, bool intr, signed long timeout);
-	void (*release)(struct fence *fence);
-
-	int (*fill_driver_data)(struct fence *fence, void *data, int size);
-	void (*fence_value_str)(struct fence *fence, char *str, int size);
-	void (*timeline_value_str)(struct fence *fence, char *str, int size);
+struct dma_fence_ops {
+	const char * (*get_driver_name)(struct dma_fence *fence);
+	const char * (*get_timeline_name)(struct dma_fence *fence);
+	bool (*enable_signaling)(struct dma_fence *fence);
+	bool (*signaled)(struct dma_fence *fence);
+	signed long (*wait)(struct dma_fence *fence,
+			    bool intr, signed long timeout);
+	void (*release)(struct dma_fence *fence);
+
+	int (*fill_driver_data)(struct dma_fence *fence, void *data, int size);
+	void (*fence_value_str)(struct dma_fence *fence, char *str, int size);
+	void (*timeline_value_str)(struct dma_fence *fence,
+				   char *str, int size);
 };
 
-void fence_init(struct fence *fence, const struct fence_ops *ops,
-		spinlock_t *lock, u64 context, unsigned seqno);
+void dma_fence_init(struct dma_fence *fence, const struct dma_fence_ops *ops,
+		    spinlock_t *lock, u64 context, unsigned seqno);
 
-void fence_release(struct kref *kref);
-void fence_free(struct fence *fence);
+void dma_fence_release(struct kref *kref);
+void dma_fence_free(struct dma_fence *fence);
 
 /**
- * fence_put - decreases refcount of the fence
+ * dma_fence_put - decreases refcount of the fence
  * @fence:	[in]	fence to reduce refcount of
  */
-static inline void fence_put(struct fence *fence)
+static inline void dma_fence_put(struct dma_fence *fence)
 {
 	if (fence)
-		kref_put(&fence->refcount, fence_release);
+		kref_put(&fence->refcount, dma_fence_release);
 }
 
 /**
- * fence_get - increases refcount of the fence
+ * dma_fence_get - increases refcount of the fence
  * @fence:	[in]	fence to increase refcount of
  *
  * Returns the same fence, with refcount increased by 1.
  */
-static inline struct fence *fence_get(struct fence *fence)
+static inline struct dma_fence *dma_fence_get(struct dma_fence *fence)
 {
 	if (fence)
 		kref_get(&fence->refcount);
@@ -206,12 +209,13 @@ static inline struct fence *fence_get(struct fence *fence)
 }
 
 /**
- * fence_get_rcu - get a fence from a reservation_object_list with rcu read lock
+ * dma_fence_get_rcu - get a fence from a reservation_object_list with
+ *                     rcu read lock
  * @fence:	[in]	fence to increase refcount of
  *
  * Function returns NULL if no refcount could be obtained, or the fence.
  */
-static inline struct fence *fence_get_rcu(struct fence *fence)
+static inline struct dma_fence *dma_fence_get_rcu(struct dma_fence *fence)
 {
 	if (kref_get_unless_zero(&fence->refcount))
 		return fence;
@@ -220,7 +224,7 @@ static inline struct fence *fence_get_rcu(struct fence *fence)
 }
 
 /**
- * fence_get_rcu_safe  - acquire a reference to an RCU tracked fence
+ * dma_fence_get_rcu_safe  - acquire a reference to an RCU tracked fence
  * @fence:	[in]	pointer to fence to increase refcount of
  *
  * Function returns NULL if no refcount could be obtained, or the fence.
@@ -235,16 +239,17 @@ static inline struct fence *fence_get_rcu(struct fence *fence)
  *
  * The caller is required to hold the RCU read lock.
  */
-static inline struct fence *fence_get_rcu_safe(struct fence * __rcu *fencep)
+static inline struct dma_fence *
+dma_fence_get_rcu_safe(struct dma_fence * __rcu *fencep)
 {
 	do {
-		struct fence *fence;
+		struct dma_fence *fence;
 
 		fence = rcu_dereference(*fencep);
-		if (!fence || !fence_get_rcu(fence))
+		if (!fence || !dma_fence_get_rcu(fence))
 			return NULL;
 
-		/* The atomic_inc_not_zero() inside fence_get_rcu()
+		/* The atomic_inc_not_zero() inside dma_fence_get_rcu()
 		 * provides a full memory barrier upon success (such as now).
 		 * This is paired with the write barrier from assigning
 		 * to the __rcu protected fence pointer so that if that
@@ -261,37 +266,41 @@ static inline struct fence *fence_get_rcu_safe(struct fence * __rcu *fencep)
 		if (fence == rcu_access_pointer(*fencep))
 			return rcu_pointer_handoff(fence);
 
-		fence_put(fence);
+		dma_fence_put(fence);
 	} while (1);
 }
 
-int fence_signal(struct fence *fence);
-int fence_signal_locked(struct fence *fence);
-signed long fence_default_wait(struct fence *fence, bool intr, signed long timeout);
-int fence_add_callback(struct fence *fence, struct fence_cb *cb,
-		       fence_func_t func);
-bool fence_remove_callback(struct fence *fence, struct fence_cb *cb);
-void fence_enable_sw_signaling(struct fence *fence);
+int dma_fence_signal(struct dma_fence *fence);
+int dma_fence_signal_locked(struct dma_fence *fence);
+signed long dma_fence_default_wait(struct dma_fence *fence,
+				   bool intr, signed long timeout);
+int dma_fence_add_callback(struct dma_fence *fence,
+			   struct dma_fence_cb *cb,
+			   dma_fence_func_t func);
+bool dma_fence_remove_callback(struct dma_fence *fence,
+			       struct dma_fence_cb *cb);
+void dma_fence_enable_sw_signaling(struct dma_fence *fence);
 
 /**
- * fence_is_signaled_locked - Return an indication if the fence is signaled yet.
+ * dma_fence_is_signaled_locked - Return an indication if the fence
+ *                                is signaled yet.
  * @fence:	[in]	the fence to check
  *
  * Returns true if the fence was already signaled, false if not. Since this
  * function doesn't enable signaling, it is not guaranteed to ever return
- * true if fence_add_callback, fence_wait or fence_enable_sw_signaling
- * haven't been called before.
+ * true if dma_fence_add_callback, dma_fence_wait or
+ * dma_fence_enable_sw_signaling haven't been called before.
  *
  * This function requires fence->lock to be held.
  */
 static inline bool
-fence_is_signaled_locked(struct fence *fence)
+dma_fence_is_signaled_locked(struct dma_fence *fence)
 {
-	if (test_bit(FENCE_FLAG_SIGNALED_BIT, &fence->flags))
+	if (test_bit(DMA_FENCE_FLAG_SIGNALED_BIT, &fence->flags))
 		return true;
 
 	if (fence->ops->signaled && fence->ops->signaled(fence)) {
-		fence_signal_locked(fence);
+		dma_fence_signal_locked(fence);
 		return true;
 	}
 
@@ -299,27 +308,27 @@ fence_is_signaled_locked(struct fence *fence)
 }
 
 /**
- * fence_is_signaled - Return an indication if the fence is signaled yet.
+ * dma_fence_is_signaled - Return an indication if the fence is signaled yet.
  * @fence:	[in]	the fence to check
  *
  * Returns true if the fence was already signaled, false if not. Since this
  * function doesn't enable signaling, it is not guaranteed to ever return
- * true if fence_add_callback, fence_wait or fence_enable_sw_signaling
- * haven't been called before.
+ * true if dma_fence_add_callback, dma_fence_wait or
+ * dma_fence_enable_sw_signaling haven't been called before.
  *
- * It's recommended for seqno fences to call fence_signal when the
+ * It's recommended for seqno fences to call dma_fence_signal when the
  * operation is complete, it makes it possible to prevent issues from
  * wraparound between time of issue and time of use by checking the return
  * value of this function before calling hardware-specific wait instructions.
  */
 static inline bool
-fence_is_signaled(struct fence *fence)
+dma_fence_is_signaled(struct dma_fence *fence)
 {
-	if (test_bit(FENCE_FLAG_SIGNALED_BIT, &fence->flags))
+	if (test_bit(DMA_FENCE_FLAG_SIGNALED_BIT, &fence->flags))
 		return true;
 
 	if (fence->ops->signaled && fence->ops->signaled(fence)) {
-		fence_signal(fence);
+		dma_fence_signal(fence);
 		return true;
 	}
 
@@ -327,14 +336,15 @@ fence_is_signaled(struct fence *fence)
 }
 
 /**
- * fence_is_later - return if f1 is chronologically later than f2
+ * dma_fence_is_later - return if f1 is chronologically later than f2
  * @f1:	[in]	the first fence from the same context
  * @f2:	[in]	the second fence from the same context
  *
  * Returns true if f1 is chronologically later than f2. Both fences must be
  * from the same context, since a seqno is not re-used across contexts.
  */
-static inline bool fence_is_later(struct fence *f1, struct fence *f2)
+static inline bool dma_fence_is_later(struct dma_fence *f1,
+				      struct dma_fence *f2)
 {
 	if (WARN_ON(f1->context != f2->context))
 		return false;
@@ -343,7 +353,7 @@ static inline bool fence_is_later(struct fence *f1, struct fence *f2)
 }
 
 /**
- * fence_later - return the chronologically later fence
+ * dma_fence_later - return the chronologically later fence
  * @f1:	[in]	the first fence from the same context
  * @f2:	[in]	the second fence from the same context
  *
@@ -351,28 +361,31 @@ static inline bool fence_is_later(struct fence *f1, struct fence *f2)
  * signaled last. Both fences must be from the same context, since a seqno is
  * not re-used across contexts.
  */
-static inline struct fence *fence_later(struct fence *f1, struct fence *f2)
+static inline struct dma_fence *dma_fence_later(struct dma_fence *f1,
+						struct dma_fence *f2)
 {
 	if (WARN_ON(f1->context != f2->context))
 		return NULL;
 
 	/*
-	 * can't check just FENCE_FLAG_SIGNALED_BIT here, it may never have been
-	 * set if enable_signaling wasn't called, and enabling that here is
-	 * overkill.
+	 * Can't check just DMA_FENCE_FLAG_SIGNALED_BIT here, it may never
+	 * have been set if enable_signaling wasn't called, and enabling that
+	 * here is overkill.
 	 */
-	if (fence_is_later(f1, f2))
-		return fence_is_signaled(f1) ? NULL : f1;
+	if (dma_fence_is_later(f1, f2))
+		return dma_fence_is_signaled(f1) ? NULL : f1;
 	else
-		return fence_is_signaled(f2) ? NULL : f2;
+		return dma_fence_is_signaled(f2) ? NULL : f2;
 }
 
-signed long fence_wait_timeout(struct fence *, bool intr, signed long timeout);
-signed long fence_wait_any_timeout(struct fence **fences, uint32_t count,
+signed long dma_fence_wait_timeout(struct dma_fence *,
 				   bool intr, signed long timeout);
+signed long dma_fence_wait_any_timeout(struct dma_fence **fences,
+				       uint32_t count,
+				       bool intr, signed long timeout);
 
 /**
- * fence_wait - sleep until the fence gets signaled
+ * dma_fence_wait - sleep until the fence gets signaled
  * @fence:	[in]	the fence to wait on
  * @intr:	[in]	if true, do an interruptible wait
  *
@@ -384,41 +397,41 @@ signed long fence_wait_any_timeout(struct fence **fences, uint32_t count,
  * directly or indirectly holds a reference to the fence, otherwise the
  * fence might be freed before return, resulting in undefined behavior.
  */
-static inline signed long fence_wait(struct fence *fence, bool intr)
+static inline signed long dma_fence_wait(struct dma_fence *fence, bool intr)
 {
 	signed long ret;
 
-	/* Since fence_wait_timeout cannot timeout with
+	/* Since dma_fence_wait_timeout cannot timeout with
 	 * MAX_SCHEDULE_TIMEOUT, only valid return values are
 	 * -ERESTARTSYS and MAX_SCHEDULE_TIMEOUT.
 	 */
-	ret = fence_wait_timeout(fence, intr, MAX_SCHEDULE_TIMEOUT);
+	ret = dma_fence_wait_timeout(fence, intr, MAX_SCHEDULE_TIMEOUT);
 
 	return ret < 0 ? ret : 0;
 }
 
-u64 fence_context_alloc(unsigned num);
+u64 dma_fence_context_alloc(unsigned num);
 
-#define FENCE_TRACE(f, fmt, args...) \
+#define DMA_FENCE_TRACE(f, fmt, args...) \
 	do {								\
-		struct fence *__ff = (f);				\
-		if (IS_ENABLED(CONFIG_FENCE_TRACE))			\
+		struct dma_fence *__ff = (f);				\
+		if (IS_ENABLED(CONFIG_DMA_FENCE_TRACE))			\
 			pr_info("f %llu#%u: " fmt,			\
 				__ff->context, __ff->seqno, ##args);	\
 	} while (0)
 
-#define FENCE_WARN(f, fmt, args...) \
+#define DMA_FENCE_WARN(f, fmt, args...) \
 	do {								\
-		struct fence *__ff = (f);				\
+		struct dma_fence *__ff = (f);				\
 		pr_warn("f %llu#%u: " fmt, __ff->context, __ff->seqno,	\
 			 ##args);					\
 	} while (0)
 
-#define FENCE_ERR(f, fmt, args...) \
+#define DMA_FENCE_ERR(f, fmt, args...) \
 	do {								\
-		struct fence *__ff = (f);				\
+		struct dma_fence *__ff = (f);				\
 		pr_err("f %llu#%u: " fmt, __ff->context, __ff->seqno,	\
 			##args);					\
 	} while (0)
 
-#endif /* __LINUX_FENCE_H */
+#endif /* __LINUX_DMA_FENCE_H */
diff --git a/include/linux/fence-array.h b/include/linux/fence-array.h
deleted file mode 100644
index 9ea2bde10ac1..000000000000
--- a/include/linux/fence-array.h
+++ /dev/null
@@ -1,84 +0,0 @@
-/*
- * fence-array: aggregates fence to be waited together
- *
- * Copyright (C) 2016 Collabora Ltd
- * Copyright (C) 2016 Advanced Micro Devices, Inc.
- * Authors:
- *	Gustavo Padovan <gustavo@padovan.org>
- *	Christian König <christian.koenig@amd.com>
- *
- * This program is free software; you can redistribute it and/or modify it
- * under the terms of the GNU General Public License version 2 as published by
- * the Free Software Foundation.
- *
- * This program is distributed in the hope that it will be useful, but WITHOUT
- * ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or
- * FITNESS FOR A PARTICULAR PURPOSE.  See the GNU General Public License for
- * more details.
- */
-
-#ifndef __LINUX_FENCE_ARRAY_H
-#define __LINUX_FENCE_ARRAY_H
-
-#include <linux/fence.h>
-
-/**
- * struct fence_array_cb - callback helper for fence array
- * @cb: fence callback structure for signaling
- * @array: reference to the parent fence array object
- */
-struct fence_array_cb {
-	struct fence_cb cb;
-	struct fence_array *array;
-};
-
-/**
- * struct fence_array - fence to represent an array of fences
- * @base: fence base class
- * @lock: spinlock for fence handling
- * @num_fences: number of fences in the array
- * @num_pending: fences in the array still pending
- * @fences: array of the fences
- */
-struct fence_array {
-	struct fence base;
-
-	spinlock_t lock;
-	unsigned num_fences;
-	atomic_t num_pending;
-	struct fence **fences;
-};
-
-extern const struct fence_ops fence_array_ops;
-
-/**
- * fence_is_array - check if a fence is from the array subsclass
- * @fence: fence to test
- *
- * Return true if it is a fence_array and false otherwise.
- */
-static inline bool fence_is_array(struct fence *fence)
-{
-	return fence->ops == &fence_array_ops;
-}
-
-/**
- * to_fence_array - cast a fence to a fence_array
- * @fence: fence to cast to a fence_array
- *
- * Returns NULL if the fence is not a fence_array,
- * or the fence_array otherwise.
- */
-static inline struct fence_array *to_fence_array(struct fence *fence)
-{
-	if (fence->ops != &fence_array_ops)
-		return NULL;
-
-	return container_of(fence, struct fence_array, base);
-}
-
-struct fence_array *fence_array_create(int num_fences, struct fence **fences,
-				       u64 context, unsigned seqno,
-				       bool signal_on_any);
-
-#endif /* __LINUX_FENCE_ARRAY_H */
diff --git a/include/linux/reservation.h b/include/linux/reservation.h
index b0f305e77b7f..2e313cca08f0 100644
--- a/include/linux/reservation.h
+++ b/include/linux/reservation.h
@@ -40,7 +40,7 @@
 #define _LINUX_RESERVATION_H
 
 #include <linux/ww_mutex.h>
-#include <linux/fence.h>
+#include <linux/dma-fence.h>
 #include <linux/slab.h>
 #include <linux/seqlock.h>
 #include <linux/rcupdate.h>
@@ -59,7 +59,7 @@ extern const char reservation_seqcount_string[];
 struct reservation_object_list {
 	struct rcu_head rcu;
 	u32 shared_count, shared_max;
-	struct fence __rcu *shared[];
+	struct dma_fence __rcu *shared[];
 };
 
 /**
@@ -74,7 +74,7 @@ struct reservation_object {
 	struct ww_mutex lock;
 	seqcount_t seq;
 
-	struct fence __rcu *fence_excl;
+	struct dma_fence __rcu *fence_excl;
 	struct reservation_object_list __rcu *fence;
 	struct reservation_object_list *staged;
 };
@@ -107,7 +107,7 @@ reservation_object_fini(struct reservation_object *obj)
 {
 	int i;
 	struct reservation_object_list *fobj;
-	struct fence *excl;
+	struct dma_fence *excl;
 
 	/*
 	 * This object should be dead and all references must have
@@ -115,12 +115,12 @@ reservation_object_fini(struct reservation_object *obj)
 	 */
 	excl = rcu_dereference_protected(obj->fence_excl, 1);
 	if (excl)
-		fence_put(excl);
+		dma_fence_put(excl);
 
 	fobj = rcu_dereference_protected(obj->fence, 1);
 	if (fobj) {
 		for (i = 0; i < fobj->shared_count; ++i)
-			fence_put(rcu_dereference_protected(fobj->shared[i], 1));
+			dma_fence_put(rcu_dereference_protected(fobj->shared[i], 1));
 
 		kfree(fobj);
 	}
@@ -155,7 +155,7 @@ reservation_object_get_list(struct reservation_object *obj)
  * RETURNS
  * The exclusive fence or NULL
  */
-static inline struct fence *
+static inline struct dma_fence *
 reservation_object_get_excl(struct reservation_object *obj)
 {
 	return rcu_dereference_protected(obj->fence_excl,
@@ -173,10 +173,10 @@ reservation_object_get_excl(struct reservation_object *obj)
  * RETURNS
  * The exclusive fence or NULL if none
  */
-static inline struct fence *
+static inline struct dma_fence *
 reservation_object_get_excl_rcu(struct reservation_object *obj)
 {
-	struct fence *fence;
+	struct dma_fence *fence;
 	unsigned seq;
 retry:
 	seq = read_seqcount_begin(&obj->seq);
@@ -186,22 +186,22 @@ retry:
 		rcu_read_unlock();
 		goto retry;
 	}
-	fence = fence_get(fence);
+	fence = dma_fence_get(fence);
 	rcu_read_unlock();
 	return fence;
 }
 
 int reservation_object_reserve_shared(struct reservation_object *obj);
 void reservation_object_add_shared_fence(struct reservation_object *obj,
-					 struct fence *fence);
+					 struct dma_fence *fence);
 
 void reservation_object_add_excl_fence(struct reservation_object *obj,
-				       struct fence *fence);
+				       struct dma_fence *fence);
 
 int reservation_object_get_fences_rcu(struct reservation_object *obj,
-				      struct fence **pfence_excl,
+				      struct dma_fence **pfence_excl,
 				      unsigned *pshared_count,
-				      struct fence ***pshared);
+				      struct dma_fence ***pshared);
 
 long reservation_object_wait_timeout_rcu(struct reservation_object *obj,
 					 bool wait_all, bool intr,
diff --git a/include/linux/seqno-fence.h b/include/linux/seqno-fence.h
index a1ba6a5ccdd6..c58c535d12a8 100644
--- a/include/linux/seqno-fence.h
+++ b/include/linux/seqno-fence.h
@@ -20,7 +20,7 @@
 #ifndef __LINUX_SEQNO_FENCE_H
 #define __LINUX_SEQNO_FENCE_H
 
-#include <linux/fence.h>
+#include <linux/dma-fence.h>
 #include <linux/dma-buf.h>
 
 enum seqno_fence_condition {
@@ -29,15 +29,15 @@ enum seqno_fence_condition {
 };
 
 struct seqno_fence {
-	struct fence base;
+	struct dma_fence base;
 
-	const struct fence_ops *ops;
+	const struct dma_fence_ops *ops;
 	struct dma_buf *sync_buf;
 	uint32_t seqno_ofs;
 	enum seqno_fence_condition condition;
 };
 
-extern const struct fence_ops seqno_fence_ops;
+extern const struct dma_fence_ops seqno_fence_ops;
 
 /**
  * to_seqno_fence - cast a fence to a seqno_fence
@@ -47,7 +47,7 @@ extern const struct fence_ops seqno_fence_ops;
  * or the seqno_fence otherwise.
  */
 static inline struct seqno_fence *
-to_seqno_fence(struct fence *fence)
+to_seqno_fence(struct dma_fence *fence)
 {
 	if (fence->ops != &seqno_fence_ops)
 		return NULL;
@@ -83,9 +83,9 @@ to_seqno_fence(struct fence *fence)
  * dma-buf for sync_buf, since mapping or unmapping the sync_buf to the
  * device's vm can be expensive.
  *
- * It is recommended for creators of seqno_fence to call fence_signal
+ * It is recommended for creators of seqno_fence to call dma_fence_signal()
  * before destruction. This will prevent possible issues from wraparound at
- * time of issue vs time of check, since users can check fence_is_signaled
+ * time of issue vs time of check, since users can check dma_fence_is_signaled()
  * before submitting instructions for the hardware to wait on the fence.
  * However, when ops.enable_signaling is not called, it doesn't have to be
  * done as soon as possible, just before there's any real danger of seqno
@@ -96,18 +96,18 @@ seqno_fence_init(struct seqno_fence *fence, spinlock_t *lock,
 		 struct dma_buf *sync_buf,  uint32_t context,
 		 uint32_t seqno_ofs, uint32_t seqno,
 		 enum seqno_fence_condition cond,
-		 const struct fence_ops *ops)
+		 const struct dma_fence_ops *ops)
 {
 	BUG_ON(!fence || !sync_buf || !ops);
 	BUG_ON(!ops->wait || !ops->enable_signaling ||
 	       !ops->get_driver_name || !ops->get_timeline_name);
 
 	/*
-	 * ops is used in fence_init for get_driver_name, so needs to be
+	 * ops is used in dma_fence_init for get_driver_name, so needs to be
 	 * initialized first
 	 */
 	fence->ops = ops;
-	fence_init(&fence->base, &seqno_fence_ops, lock, context, seqno);
+	dma_fence_init(&fence->base, &seqno_fence_ops, lock, context, seqno);
 	get_dma_buf(sync_buf);
 	fence->sync_buf = sync_buf;
 	fence->seqno_ofs = seqno_ofs;
diff --git a/include/linux/sync_file.h b/include/linux/sync_file.h
index aa17ccfc2f57..3e3ab84fc4cd 100644
--- a/include/linux/sync_file.h
+++ b/include/linux/sync_file.h
@@ -18,8 +18,8 @@
 #include <linux/ktime.h>
 #include <linux/list.h>
 #include <linux/spinlock.h>
-#include <linux/fence.h>
-#include <linux/fence-array.h>
+#include <linux/dma-fence.h>
+#include <linux/dma-fence-array.h>
 
 /**
  * struct sync_file - sync file to export to the userspace
@@ -41,13 +41,13 @@ struct sync_file {
 
 	wait_queue_head_t	wq;
 
-	struct fence		*fence;
-	struct fence_cb cb;
+	struct dma_fence	*fence;
+	struct dma_fence_cb cb;
 };
 
-#define POLL_ENABLED FENCE_FLAG_USER_BITS
+#define POLL_ENABLED DMA_FENCE_FLAG_USER_BITS
 
-struct sync_file *sync_file_create(struct fence *fence);
-struct fence *sync_file_get_fence(int fd);
+struct sync_file *sync_file_create(struct dma_fence *fence);
+struct dma_fence *sync_file_get_fence(int fd);
 
 #endif /* _LINUX_SYNC_H */
diff --git a/include/trace/events/fence.h b/include/trace/events/dma_fence.h
index d6dfa05ba322..1157cb4c3c6f 100644
--- a/include/trace/events/fence.h
+++ b/include/trace/events/dma_fence.h
@@ -1,17 +1,17 @@
 #undef TRACE_SYSTEM
-#define TRACE_SYSTEM fence
+#define TRACE_SYSTEM dma_fence
 
 #if !defined(_TRACE_FENCE_H) || defined(TRACE_HEADER_MULTI_READ)
-#define _TRACE_FENCE_H
+#define _TRACE_DMA_FENCE_H
 
 #include <linux/tracepoint.h>
 
-struct fence;
+struct dma_fence;
 
-TRACE_EVENT(fence_annotate_wait_on,
+TRACE_EVENT(dma_fence_annotate_wait_on,
 
 	/* fence: the fence waiting on f1, f1: the fence to be waited on. */
-	TP_PROTO(struct fence *fence, struct fence *f1),
+	TP_PROTO(struct dma_fence *fence, struct dma_fence *f1),
 
 	TP_ARGS(fence, f1),
 
@@ -48,9 +48,9 @@ TRACE_EVENT(fence_annotate_wait_on,
 		  __entry->waiting_context, __entry->waiting_seqno)
 );
 
-DECLARE_EVENT_CLASS(fence,
+DECLARE_EVENT_CLASS(dma_fence,
 
-	TP_PROTO(struct fence *fence),
+	TP_PROTO(struct dma_fence *fence),
 
 	TP_ARGS(fence),
 
@@ -73,56 +73,56 @@ DECLARE_EVENT_CLASS(fence,
 		  __entry->seqno)
 );
 
-DEFINE_EVENT(fence, fence_emit,
+DEFINE_EVENT(dma_fence, dma_fence_emit,
 
-	TP_PROTO(struct fence *fence),
+	TP_PROTO(struct dma_fence *fence),
 
 	TP_ARGS(fence)
 );
 
-DEFINE_EVENT(fence, fence_init,
+DEFINE_EVENT(dma_fence, dma_fence_init,
 
-	TP_PROTO(struct fence *fence),
+	TP_PROTO(struct dma_fence *fence),
 
 	TP_ARGS(fence)
 );
 
-DEFINE_EVENT(fence, fence_destroy,
+DEFINE_EVENT(dma_fence, dma_fence_destroy,
 
-	TP_PROTO(struct fence *fence),
+	TP_PROTO(struct dma_fence *fence),
 
 	TP_ARGS(fence)
 );
 
-DEFINE_EVENT(fence, fence_enable_signal,
+DEFINE_EVENT(dma_fence, dma_fence_enable_signal,
 
-	TP_PROTO(struct fence *fence),
+	TP_PROTO(struct dma_fence *fence),
 
 	TP_ARGS(fence)
 );
 
-DEFINE_EVENT(fence, fence_signaled,
+DEFINE_EVENT(dma_fence, dma_fence_signaled,
 
-	TP_PROTO(struct fence *fence),
+	TP_PROTO(struct dma_fence *fence),
 
 	TP_ARGS(fence)
 );
 
-DEFINE_EVENT(fence, fence_wait_start,
+DEFINE_EVENT(dma_fence, dma_fence_wait_start,
 
-	TP_PROTO(struct fence *fence),
+	TP_PROTO(struct dma_fence *fence),
 
 	TP_ARGS(fence)
 );
 
-DEFINE_EVENT(fence, fence_wait_end,
+DEFINE_EVENT(dma_fence, dma_fence_wait_end,
 
-	TP_PROTO(struct fence *fence),
+	TP_PROTO(struct dma_fence *fence),
 
 	TP_ARGS(fence)
 );
 
-#endif /*  _TRACE_FENCE_H */
+#endif /*  _TRACE_DMA_FENCE_H */
 
 /* This part must be outside protection */
 #include <trace/define_trace.h>