[mirror_ubuntu-bionic-kernel.git] / drivers / gpu / drm / amd / scheduler / sched_fence.c

/*
 * Copyright 2015 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.
 *
 *
 */
#include <linux/kthread.h>
#include <linux/wait.h>
#include <linux/sched.h>
#include <drm/drmP.h>
#include "gpu_scheduler.h"

struct amd_sched_fence *amd_sched_fence_create(struct amd_sched_entity *s_entity, void *owner)
{
	struct amd_sched_fence *fence = NULL;
	unsigned seq;

	fence = kmem_cache_zalloc(sched_fence_slab, GFP_KERNEL);
	if (fence == NULL)
		return NULL;

	INIT_LIST_HEAD(&fence->scheduled_cb);
	fence->owner = owner;
	fence->sched = s_entity->sched;
	spin_lock_init(&fence->lock);

	seq = atomic_inc_return(&s_entity->fence_seq);
	fence_init(&fence->base, &amd_sched_fence_ops, &fence->lock,
		   s_entity->fence_context, seq);

	return fence;
}

void amd_sched_fence_signal(struct amd_sched_fence *fence)
{
	int ret = fence_signal(&fence->base);
	if (!ret)
		FENCE_TRACE(&fence->base, "signaled from irq context\n");
	else
		FENCE_TRACE(&fence->base, "was already signaled\n");
}

void amd_sched_fence_scheduled(struct amd_sched_fence *s_fence)
{
	struct fence_cb *cur, *tmp;

	set_bit(AMD_SCHED_FENCE_SCHEDULED_BIT, &s_fence->base.flags);
	list_for_each_entry_safe(cur, tmp, &s_fence->scheduled_cb, node) {
		list_del_init(&cur->node);
		cur->func(&s_fence->base, cur);
	}
}

static const char *amd_sched_fence_get_driver_name(struct fence *fence)
{
	return "amd_sched";
}

static const char *amd_sched_fence_get_timeline_name(struct fence *f)
{
	struct amd_sched_fence *fence = to_amd_sched_fence(f);
	return (const char *)fence->sched->name;
}

static bool amd_sched_fence_enable_signaling(struct fence *f)
{
	return true;
}

static void amd_sched_fence_release(struct fence *f)
{
	struct amd_sched_fence *fence = to_amd_sched_fence(f);
	kmem_cache_free(sched_fence_slab, fence);
}

const struct fence_ops amd_sched_fence_ops = {
	.get_driver_name = amd_sched_fence_get_driver_name,
	.get_timeline_name = amd_sched_fence_get_timeline_name,
	.enable_signaling = amd_sched_fence_enable_signaling,
	.signaled = NULL,
	.wait = fence_default_wait,
	.release = amd_sched_fence_release,
};
Commit	Line	Data
f556cb0c CZ	1	/*
	2	* Copyright 2015 Advanced Micro Devices, Inc.
	3	*
	4	* Permission is hereby granted, free of charge, to any person obtaining a
	5	* copy of this software and associated documentation files (the "Software"),
	6	* to deal in the Software without restriction, including without limitation
	7	* the rights to use, copy, modify, merge, publish, distribute, sublicense,
	8	* and/or sell copies of the Software, and to permit persons to whom the
	9	* Software is furnished to do so, subject to the following conditions:
	10	*
	11	* The above copyright notice and this permission notice shall be included in
	12	* all copies or substantial portions of the Software.
	13	*
	14	* THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
	15	* IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
	16	* FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL
	17	* THE COPYRIGHT HOLDER(S) OR AUTHOR(S) BE LIABLE FOR ANY CLAIM, DAMAGES OR
	18	* OTHER LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE,
	19	* ARISING FROM, OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR
	20	* OTHER DEALINGS IN THE SOFTWARE.
	21	*
	22	*
	23	*/
	24	#include <linux/kthread.h>
	25	#include <linux/wait.h>
	26	#include <linux/sched.h>
	27	#include <drm/drmP.h>
	28	#include "gpu_scheduler.h"
	29
84f76ea6	30	struct amd_sched_fence amd_sched_fence_create(struct amd_sched_entity s_entity, void *owner)
f556cb0c CZ	31	{
f556cb0c CZ	32	struct amd_sched_fence *fence = NULL;
ce882e6d CK	33	unsigned seq;
ce882e6d CK	34
f5617f9d	35	fence = kmem_cache_zalloc(sched_fence_slab, GFP_KERNEL);
f556cb0c CZ	36	if (fence == NULL)
f556cb0c CZ	37	return NULL;
393a0bd4 CK	38
393a0bd4 CK	39	INIT_LIST_HEAD(&fence->scheduled_cb);
84f76ea6	40	fence->owner = owner;
9b398fa5	41	fence->sched = s_entity->sched;
f556cb0c	42	spin_lock_init(&fence->lock);
ce882e6d CK	43
	44	seq = atomic_inc_return(&s_entity->fence_seq);
	45	fence_init(&fence->base, &amd_sched_fence_ops, &fence->lock,
	46	s_entity->fence_context, seq);
	47
f556cb0c CZ	48	return fence;
	49	}
	50
f556cb0c CZ	51	void amd_sched_fence_signal(struct amd_sched_fence *fence)
f556cb0c CZ	52	{
2983e5ce CK	53	int ret = fence_signal(&fence->base);
	54	if (!ret)
	55	FENCE_TRACE(&fence->base, "signaled from irq context\n");
	56	else
	57	FENCE_TRACE(&fence->base, "was already signaled\n");
f556cb0c CZ	58	}
f556cb0c CZ	59
393a0bd4 CK	60	void amd_sched_fence_scheduled(struct amd_sched_fence *s_fence)
	61	{
	62	struct fence_cb cur, tmp;
	63
	64	set_bit(AMD_SCHED_FENCE_SCHEDULED_BIT, &s_fence->base.flags);
	65	list_for_each_entry_safe(cur, tmp, &s_fence->scheduled_cb, node) {
	66	list_del_init(&cur->node);
	67	cur->func(&s_fence->base, cur);
	68	}
	69	}
	70
f556cb0c CZ	71	static const char amd_sched_fence_get_driver_name(struct fence fence)
	72	{
	73	return "amd_sched";
	74	}
	75
	76	static const char amd_sched_fence_get_timeline_name(struct fence f)
	77	{
	78	struct amd_sched_fence *fence = to_amd_sched_fence(f);
9b398fa5	79	return (const char *)fence->sched->name;
f556cb0c CZ	80	}
	81
	82	static bool amd_sched_fence_enable_signaling(struct fence *f)
	83	{
2983e5ce	84	return true;
f556cb0c CZ	85	}
f556cb0c CZ	86
f5617f9d CZ	87	static void amd_sched_fence_release(struct fence *f)
	88	{
	89	struct amd_sched_fence *fence = to_amd_sched_fence(f);
	90	kmem_cache_free(sched_fence_slab, fence);
	91	}
	92
f556cb0c CZ	93	const struct fence_ops amd_sched_fence_ops = {
	94	.get_driver_name = amd_sched_fence_get_driver_name,
	95	.get_timeline_name = amd_sched_fence_get_timeline_name,
	96	.enable_signaling = amd_sched_fence_enable_signaling,
2983e5ce	97	.signaled = NULL,
f556cb0c	98	.wait = fence_default_wait,
f5617f9d	99	.release = amd_sched_fence_release,
f556cb0c	100	};