1 files changed, 0 insertions, 121 deletions
diff --git a/drivers/gpu/drm/amd/scheduler/spsc_queue.h b/drivers/gpu/drm/amd/scheduler/spsc_queue.h
deleted file mode 100644
index 5902f35ce759..000000000000
--- a/drivers/gpu/drm/amd/scheduler/spsc_queue.h
+++ /dev/null
@@ -1,121 +0,0 @@
-/*
- * Copyright 2017 Advanced Micro Devices, Inc.
- *
- * Permission is hereby granted, free of charge, to any person obtaining a
- * copy of this software and associated documentation files (the "Software"),
- * to deal in the Software without restriction, including without limitation
- * the rights to use, copy, modify, merge, publish, distribute, sublicense,
- * and/or sell copies of the Software, and to permit persons to whom the
- * Software is furnished to do so, subject to the following conditions:
- *
- * The above copyright notice and this permission notice shall be included in
- * all copies or substantial portions of the Software.
- *
- * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
- * IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
- * FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT.  IN NO EVENT SHALL
- * THE COPYRIGHT HOLDER(S) OR AUTHOR(S) BE LIABLE FOR ANY CLAIM, DAMAGES OR
- * OTHER LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE,
- * ARISING FROM, OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR
- * OTHER DEALINGS IN THE SOFTWARE.
- *
- */
-
-#ifndef AMD_SCHEDULER_SPSC_QUEUE_H_
-#define AMD_SCHEDULER_SPSC_QUEUE_H_
-
-#include <linux/atomic.h>
-
-/** SPSC lockless queue */
-
-struct spsc_node {
-
-	/* Stores spsc_node* */
-	struct spsc_node *next;
-};
-
-struct spsc_queue {
-
-	 struct spsc_node *head;
-
-	/* atomic pointer to struct spsc_node* */
-	atomic_long_t tail;
-
-	atomic_t job_count;
-};
-
-static inline void spsc_queue_init(struct spsc_queue *queue)
-{
-	queue->head = NULL;
-	atomic_long_set(&queue->tail, (long)&queue->head);
-	atomic_set(&queue->job_count, 0);
-}
-
-static inline struct spsc_node *spsc_queue_peek(struct spsc_queue *queue)
-{
-	return queue->head;
-}
-
-static inline int spsc_queue_count(struct spsc_queue *queue)
-{
-	return atomic_read(&queue->job_count);
-}
-
-static inline bool spsc_queue_push(struct spsc_queue *queue, struct spsc_node *node)
-{
-	struct spsc_node **tail;
-
-	node->next = NULL;
-
-	preempt_disable();
-
-	tail = (struct spsc_node **)atomic_long_xchg(&queue->tail, (long)&node->next);
-	WRITE_ONCE(*tail, node);
-	atomic_inc(&queue->job_count);
-
-	/*
-	 * In case of first element verify new node will be visible to the consumer
-	 * thread when we ping the kernel thread that there is new work to do.
-	 */
-	smp_wmb();
-
-	preempt_enable();
-
-	return tail == &queue->head;
-}
-
-
-static inline struct spsc_node *spsc_queue_pop(struct spsc_queue *queue)
-{
-	struct spsc_node *next, *node;
-
-	/* Verify reading from memory and not the cache */
-	smp_rmb();
-
-	node = READ_ONCE(queue->head);
-
-	if (!node)
-		return NULL;
-
-	next = READ_ONCE(node->next);
-	WRITE_ONCE(queue->head, next);
-
-	if (unlikely(!next)) {
-		/* slowpath for the last element in the queue */
-
-		if (atomic_long_cmpxchg(&queue->tail,
-				(long)&node->next, (long) &queue->head) != (long)&node->next) {
-			/* Updating tail failed wait for new next to appear */
-			do {
-				smp_rmb();
-			} while (unlikely(!(queue->head = READ_ONCE(node->next))));
-		}
-	}
-
-	atomic_dec(&queue->job_count);
-	return node;
-}
-
-
-
-#endif /* AMD_SCHEDULER_SPSC_QUEUE_H_ */