linux/drivers/gpu/drm/i915/selftests/lib_sw_fence.c

/*
 * Copyright © 2017 Intel Corporation
 *
 * 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 (including the next
 * paragraph) 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 AUTHORS OR COPYRIGHT HOLDERS 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.
 *
 */

#include "lib_sw_fence.h"

/* Small library of different fence types useful for writing tests */

static int
nop_fence_notify(struct i915_sw_fence *fence, enum i915_sw_fence_notify state)
{ … }

void __onstack_fence_init(struct i915_sw_fence *fence,
			  const char *name,
			  struct lock_class_key *key)
{ … }

void onstack_fence_fini(struct i915_sw_fence *fence)
{ … }

static void timed_fence_wake(struct timer_list *t)
{ … }

void timed_fence_init(struct timed_fence *tf, unsigned long expires)
{ … }

void timed_fence_fini(struct timed_fence *tf)
{ … }

struct heap_fence { … };

static int
heap_fence_notify(struct i915_sw_fence *fence, enum i915_sw_fence_notify state)
{ … }

struct i915_sw_fence *heap_fence_create(gfp_t gfp)
{ … }

static void heap_fence_release(struct kref *ref)
{ … }

void heap_fence_put(struct i915_sw_fence *fence)
{ … }