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kernel add
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/*
* 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
");
else
FENCE_TRACE(&fence->base, "was already signaled
");
}
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,
};
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