66 lines
1.6 KiB
C
66 lines
1.6 KiB
C
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/*
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* i915_sw_fence.h - library routines for N:M synchronisation points
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*
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* Copyright (C) 2016 Intel Corporation
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*
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* This file is released under the GPLv2.
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*
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*/
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#ifndef _I915_SW_FENCE_H_
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#define _I915_SW_FENCE_H_
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#include <linux/gfp.h>
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#include <linux/kref.h>
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#include <linux/notifier.h> /* for NOTIFY_DONE */
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#include <linux/wait.h>
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struct completion;
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struct fence;
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struct fence_ops;
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struct reservation_object;
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struct i915_sw_fence {
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wait_queue_head_t wait;
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unsigned long flags;
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struct kref kref;
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atomic_t pending;
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};
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#define I915_SW_FENCE_CHECKED_BIT 0 /* used internally for DAG checking */
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#define I915_SW_FENCE_PRIVATE_BIT 1 /* available for use by owner */
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#define I915_SW_FENCE_MASK (~3)
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enum i915_sw_fence_notify {
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FENCE_COMPLETE,
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FENCE_FREE
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};
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typedef int (*i915_sw_fence_notify_t)(struct i915_sw_fence *,
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enum i915_sw_fence_notify state);
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#define __i915_sw_fence_call __aligned(4)
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void i915_sw_fence_init(struct i915_sw_fence *fence, i915_sw_fence_notify_t fn);
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void i915_sw_fence_commit(struct i915_sw_fence *fence);
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int i915_sw_fence_await_sw_fence(struct i915_sw_fence *fence,
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struct i915_sw_fence *after,
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wait_queue_t *wq);
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int i915_sw_fence_await_dma_fence(struct i915_sw_fence *fence,
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struct fence *dma,
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unsigned long timeout,
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gfp_t gfp);
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int i915_sw_fence_await_reservation(struct i915_sw_fence *fence,
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struct reservation_object *resv,
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const struct fence_ops *exclude,
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bool write,
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unsigned long timeout,
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gfp_t gfp);
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static inline bool i915_sw_fence_done(const struct i915_sw_fence *fence)
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{
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return atomic_read(&fence->pending) < 0;
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}
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#endif /* _I915_SW_FENCE_H_ */
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