drivers/gpu/drm/amd/amdgpu/amdgpu_eviction_fence.h

/* SPDX-License-Identifier: MIT */
/*
 * Copyright 2023 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 AMDGPU_EV_FENCE_H_
#define AMDGPU_EV_FENCE_H_

struct amdgpu_eviction_fence {
	struct dma_fence base;
	spinlock_t	 lock;
	char		 timeline_name[TASK_COMM_LEN];
	struct amdgpu_eviction_fence_mgr *evf_mgr;
};

struct amdgpu_eviction_fence_mgr {
	u64			ev_fence_ctx;
	atomic_t		ev_fence_seq;
	spinlock_t		ev_fence_lock;
	struct amdgpu_eviction_fence *ev_fence;
	struct delayed_work	suspend_work;
	uint8_t fd_closing;
};

/* Eviction fence helper functions */
struct amdgpu_eviction_fence *
amdgpu_eviction_fence_create(struct amdgpu_eviction_fence_mgr *evf_mgr);

void
amdgpu_eviction_fence_destroy(struct amdgpu_eviction_fence_mgr *evf_mgr);

int
amdgpu_eviction_fence_attach(struct amdgpu_eviction_fence_mgr *evf_mgr,
			     struct amdgpu_bo *bo);

void
amdgpu_eviction_fence_detach(struct amdgpu_eviction_fence_mgr *evf_mgr,
			     struct amdgpu_bo *bo);

int
amdgpu_eviction_fence_init(struct amdgpu_eviction_fence_mgr *evf_mgr);

void
amdgpu_eviction_fence_signal(struct amdgpu_eviction_fence_mgr *evf_mgr,
			     struct amdgpu_eviction_fence *ev_fence);

int
amdgpu_eviction_fence_replace_fence(struct amdgpu_eviction_fence_mgr *evf_mgr,
				    struct drm_exec *exec);
#endif