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/*
* Copyright (C) 2017 Etnaviv Project
*
* This program is free software; you can redistribute it and/or modify it
* under the terms of the GNU General Public License version 2 as published by
* the Free Software Foundation.
*
* This program is distributed in the hope that it will be useful, but WITHOUT
* ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or
* FITNESS FOR A PARTICULAR PURPOSE. See the GNU General Public License for
* more details.
*
* You should have received a copy of the GNU General Public License along with
* this program. If not, see <http://www.gnu.org/licenses/>.
*/
#include <drm/gpu_scheduler.h>
#include <linux/kthread.h>
#include "etnaviv_drv.h"
#include "etnaviv_gem.h"
#include "etnaviv_gpu.h"
static int etnaviv_job_hang_limit = 0;
module_param_named(job_hang_limit, etnaviv_job_hang_limit, int , 0444);
static int etnaviv_hw_jobs_limit = 2;
module_param_named(hw_job_limit, etnaviv_hw_jobs_limit, int , 0444);
static inline
struct etnaviv_gem_submit *to_etnaviv_submit(struct drm_sched_job *sched_job)
{
return container_of(sched_job, struct etnaviv_gem_submit, sched_job);
}
struct dma_fence *etnaviv_sched_dependency(struct drm_sched_job *sched_job,
struct drm_sched_entity *entity)
{
return NULL;
}
struct dma_fence *etnaviv_sched_run_job(struct drm_sched_job *sched_job)
{
struct etnaviv_gem_submit *submit = to_etnaviv_submit(sched_job);
struct dma_fence *fence;
mutex_lock(&submit->gpu->lock);
list_add_tail(&submit->node, &submit->gpu->active_submit_list);
mutex_unlock(&submit->gpu->lock);
fence = etnaviv_gpu_submit(submit);
if (!fence) {
etnaviv_submit_put(submit);
return NULL;
}
return fence;
}
static void etnaviv_sched_timedout_job(struct drm_sched_job *sched_job)
{
/* this replaces the hangcheck */
}
static void etnaviv_sched_free_job(struct drm_sched_job *sched_job)
{
struct etnaviv_gem_submit *submit = to_etnaviv_submit(sched_job);
mutex_lock(&submit->gpu->lock);
list_del(&submit->node);
mutex_unlock(&submit->gpu->lock);
etnaviv_submit_put(submit);
}
static const struct drm_sched_backend_ops etnaviv_sched_ops = {
.dependency = etnaviv_sched_dependency,
.run_job = etnaviv_sched_run_job,
.timedout_job = etnaviv_sched_timedout_job,
.free_job = etnaviv_sched_free_job,
};
int etnaviv_sched_push_job(struct drm_sched_entity *sched_entity,
struct etnaviv_gem_submit *submit)
{
int ret;
ret = drm_sched_job_init(&submit->sched_job, &submit->gpu->sched,
sched_entity, submit->cmdbuf.ctx);
if (ret)
return ret;
submit->out_fence = dma_fence_get(&submit->sched_job.s_fence->finished);
mutex_lock(&submit->gpu->fence_idr_lock);
submit->out_fence_id = idr_alloc_cyclic(&submit->gpu->fence_idr,
submit->out_fence, 0,
INT_MAX, GFP_KERNEL);
mutex_unlock(&submit->gpu->fence_idr_lock);
if (submit->out_fence_id < 0)
return -ENOMEM;
/* the scheduler holds on to the job now */
kref_get(&submit->refcount);
drm_sched_entity_push_job(&submit->sched_job, sched_entity);
return 0;
}
int etnaviv_sched_init(struct etnaviv_gpu *gpu)
{
int ret;
ret = drm_sched_init(&gpu->sched, &etnaviv_sched_ops,
etnaviv_hw_jobs_limit, etnaviv_job_hang_limit,
msecs_to_jiffies(500), dev_name(gpu->dev));
if (ret)
return ret;
return 0;
}
void etnaviv_sched_fini(struct etnaviv_gpu *gpu)
{
drm_sched_fini(&gpu->sched);
}
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