linux/drivers/gpu/drm/i915/i915_sw_fence_work.h

/* SPDX-License-Identifier: MIT */

/*
 * Copyright © 2019 Intel Corporation
 */

#ifndef I915_SW_FENCE_WORK_H
#define I915_SW_FENCE_WORK_H

#include <linux/dma-fence.h>
#include <linux/spinlock.h>
#include <linux/workqueue.h>

#include "i915_sw_fence.h"

struct dma_fence_work;

struct dma_fence_work_ops { … };

struct dma_fence_work { … };

enum { … };

void dma_fence_work_init(struct dma_fence_work *f,
			 const struct dma_fence_work_ops *ops);
int dma_fence_work_chain(struct dma_fence_work *f, struct dma_fence *signal);

static inline void dma_fence_work_commit(struct dma_fence_work *f)
{ … }

/**
 * dma_fence_work_commit_imm: Commit the fence, and if possible execute locally.
 * @f: the fenced worker
 *
 * Instead of always scheduling a worker to execute the callback (see
 * dma_fence_work_commit()), we try to execute the callback immediately in
 * the local context. It is required that the fence be committed before it
 * is published, and that no other threads try to tamper with the number
 * of asynchronous waits on the fence (or else the callback will be
 * executed in the wrong context, i.e. not the callers).
 */
static inline void dma_fence_work_commit_imm(struct dma_fence_work *f)
{ … }

#endif /* I915_SW_FENCE_WORK_H */