[PATCH v5 1/2] drm/sched: Refactor ring mirror list handling.
Grodzovsky, Andrey
Andrey.Grodzovsky at amd.com
Thu Jan 3 17:42:40 UTC 2019
On 01/03/2019 11:20 AM, Grodzovsky, Andrey wrote:
>
> On 01/03/2019 03:54 AM, Koenig, Christian wrote:
>> Am 21.12.18 um 21:36 schrieb Grodzovsky, Andrey:
>>> On 12/21/2018 01:37 PM, Christian König wrote:
>>>> Am 20.12.18 um 20:23 schrieb Andrey Grodzovsky:
>>>>> Decauple sched threads stop and start and ring mirror
>>>>> list handling from the policy of what to do about the
>>>>> guilty jobs.
>>>>> When stoppping the sched thread and detaching sched fences
>>>>> from non signaled HW fenes wait for all signaled HW fences
>>>>> to complete before rerunning the jobs.
>>>>>
>>>>> v2: Fix resubmission of guilty job into HW after refactoring.
>>>>>
>>>>> v4:
>>>>> Full restart for all the jobs, not only from guilty ring.
>>>>> Extract karma increase into standalone function.
>>>>>
>>>>> v5:
>>>>> Rework waiting for signaled jobs without relying on the job
>>>>> struct itself as those might already be freed for non 'guilty'
>>>>> job's schedulers.
>>>>> Expose karma increase to drivers.
>>>>>
>>>>> Suggested-by: Christian Koenig <Christian.Koenig at amd.com>
>>>>> Signed-off-by: Andrey Grodzovsky <andrey.grodzovsky at amd.com>
>>>>> ---
>>>>> drivers/gpu/drm/amd/amdgpu/amdgpu_device.c | 18 +--
>>>>> drivers/gpu/drm/etnaviv/etnaviv_sched.c | 11 +-
>>>>> drivers/gpu/drm/scheduler/sched_main.c | 188
>>>>> +++++++++++++++++++----------
>>>>> drivers/gpu/drm/v3d/v3d_sched.c | 12 +-
>>>>> include/drm/gpu_scheduler.h | 10 +-
>>>>> 5 files changed, 151 insertions(+), 88 deletions(-)
>>>>>
>>>>> diff --git a/drivers/gpu/drm/amd/amdgpu/amdgpu_device.c
>>>>> b/drivers/gpu/drm/amd/amdgpu/amdgpu_device.c
>>>>> index 8a078f4..a4bd2d3 100644
>>>>> --- a/drivers/gpu/drm/amd/amdgpu/amdgpu_device.c
>>>>> +++ b/drivers/gpu/drm/amd/amdgpu/amdgpu_device.c
>>>>> @@ -3298,12 +3298,10 @@ static int
>>>>> amdgpu_device_pre_asic_reset(struct amdgpu_device *adev,
>>>>> if (!ring || !ring->sched.thread)
>>>>> continue;
>>>>> - kthread_park(ring->sched.thread);
>>>>> + drm_sched_stop(&ring->sched, job ? &job->base : NULL);
>>>>> - if (job && job->base.sched != &ring->sched)
>>>>> - continue;
>>>>> -
>>>>> - drm_sched_hw_job_reset(&ring->sched, job ? &job->base : NULL);
>>>>> + if(job)
>>>>> + drm_sched_increase_karma(&job->base);
>>>> Since we dropped the "job && job->base.sched != &ring->sched" check
>>>> above this will now increase the jobs karma multiple times.
>>>>
>>>> Maybe just move that outside of the loop.
>>>>
>>>>> /* after all hw jobs are reset, hw fence is meaningless,
>>>>> so force_completion */
>>>>> amdgpu_fence_driver_force_completion(ring);
>>>>> @@ -3454,14 +3452,10 @@ static void
>>>>> amdgpu_device_post_asic_reset(struct amdgpu_device *adev,
>>>>> if (!ring || !ring->sched.thread)
>>>>> continue;
>>>>> - /* only need recovery sched of the given job's ring
>>>>> - * or all rings (in the case @job is NULL)
>>>>> - * after above amdgpu_reset accomplished
>>>>> - */
>>>>> - if ((!job || job->base.sched == &ring->sched) &&
>>>>> !adev->asic_reset_res)
>>>>> - drm_sched_job_recovery(&ring->sched);
>>>>> + if (!adev->asic_reset_res)
>>>>> + drm_sched_resubmit_jobs(&ring->sched);
>>>>> - kthread_unpark(ring->sched.thread);
>>>>> + drm_sched_start(&ring->sched, !adev->asic_reset_res);
>>>>> }
>>>>> if (!amdgpu_device_has_dc_support(adev)) {
>>>>> diff --git a/drivers/gpu/drm/etnaviv/etnaviv_sched.c
>>>>> b/drivers/gpu/drm/etnaviv/etnaviv_sched.c
>>>>> index 49a6763..6f1268f 100644
>>>>> --- a/drivers/gpu/drm/etnaviv/etnaviv_sched.c
>>>>> +++ b/drivers/gpu/drm/etnaviv/etnaviv_sched.c
>>>>> @@ -109,16 +109,19 @@ static void etnaviv_sched_timedout_job(struct
>>>>> drm_sched_job *sched_job)
>>>>> }
>>>>> /* block scheduler */
>>>>> - kthread_park(gpu->sched.thread);
>>>>> - drm_sched_hw_job_reset(&gpu->sched, sched_job);
>>>>> + drm_sched_stop(&gpu->sched, sched_job);
>>>>> +
>>>>> + if(sched_job)
>>>>> + drm_sched_increase_karma(sched_job);
>>>>> /* get the GPU back into the init state */
>>>>> etnaviv_core_dump(gpu);
>>>>> etnaviv_gpu_recover_hang(gpu);
>>>>> + drm_sched_resubmit_jobs(&gpu->sched);
>>>>> +
>>>>> /* restart scheduler after GPU is usable again */
>>>>> - drm_sched_job_recovery(&gpu->sched);
>>>>> - kthread_unpark(gpu->sched.thread);
>>>>> + drm_sched_start(&gpu->sched, true);
>>>>> }
>>>>> static void etnaviv_sched_free_job(struct drm_sched_job *sched_job)
>>>>> diff --git a/drivers/gpu/drm/scheduler/sched_main.c
>>>>> b/drivers/gpu/drm/scheduler/sched_main.c
>>>>> index dbb6906..b5c5bee 100644
>>>>> --- a/drivers/gpu/drm/scheduler/sched_main.c
>>>>> +++ b/drivers/gpu/drm/scheduler/sched_main.c
>>>>> @@ -60,8 +60,6 @@
>>>>> static void drm_sched_process_job(struct dma_fence *f, struct
>>>>> dma_fence_cb *cb);
>>>>> -static void drm_sched_expel_job_unlocked(struct drm_sched_job
>>>>> *s_job);
>>>>> -
>>>>> /**
>>>>> * drm_sched_rq_init - initialize a given run queue struct
>>>>> *
>>>>> @@ -335,6 +333,42 @@ static void drm_sched_job_timedout(struct
>>>>> work_struct *work)
>>>>> spin_unlock_irqrestore(&sched->job_list_lock, flags);
>>>>> }
>>>> Kernel doc here would be nice to have.
>>>>
>>>>> +void drm_sched_increase_karma(struct drm_sched_job *bad)
>>>>> +{
>>>>> + int i;
>>>>> + struct drm_sched_entity *tmp;
>>>>> + struct drm_sched_entity *entity;
>>>>> + struct drm_gpu_scheduler *sched = bad->sched;
>>>>> +
>>>>> + /* don't increase @bad's karma if it's from KERNEL RQ,
>>>>> + * because sometimes GPU hang would cause kernel jobs (like VM
>>>>> updating jobs)
>>>>> + * corrupt but keep in mind that kernel jobs always considered
>>>>> good.
>>>>> + */
>>>>> + if (bad->s_priority != DRM_SCHED_PRIORITY_KERNEL) {
>>>>> + atomic_inc(&bad->karma);
>>>>> + for (i = DRM_SCHED_PRIORITY_MIN; i < DRM_SCHED_PRIORITY_KERNEL;
>>>>> + i++) {
>>>>> + struct drm_sched_rq *rq = &sched->sched_rq[i];
>>>>> +
>>>>> + spin_lock(&rq->lock);
>>>>> + list_for_each_entry_safe(entity, tmp, &rq->entities,
>>>>> list) {
>>>>> + if (bad->s_fence->scheduled.context ==
>>>>> + entity->fence_context) {
>>>>> + if (atomic_read(&bad->karma) >
>>>>> + bad->sched->hang_limit)
>>>>> + if (entity->guilty)
>>>>> + atomic_set(entity->guilty, 1);
>>>>> + break;
>>>>> + }
>>>>> + }
>>>>> + spin_unlock(&rq->lock);
>>>>> + if (&entity->list != &rq->entities)
>>>>> + break;
>>>>> + }
>>>>> + }
>>>>> +}
>>>>> +EXPORT_SYMBOL(drm_sched_increase_karma);
>>>>> +
>>>>> /**
>>>>> * drm_sched_hw_job_reset - stop the scheduler if it contains the
>>>>> bad job
>>>>> *
>>>>> @@ -342,13 +376,22 @@ static void drm_sched_job_timedout(struct
>>>>> work_struct *work)
>>>>> * @bad: bad scheduler job
>>>>> *
>>>>> */
>>>>> -void drm_sched_hw_job_reset(struct drm_gpu_scheduler *sched, struct
>>>>> drm_sched_job *bad)
>>>>> +void drm_sched_stop(struct drm_gpu_scheduler *sched, struct
>>>>> drm_sched_job *bad)
>>>>> {
>>>>> - struct drm_sched_job *s_job;
>>>>> - struct drm_sched_entity *entity, *tmp;
>>>>> + struct drm_sched_job *s_job, *last_job;
>>>>> unsigned long flags;
>>>>> - int i;
>>>>> + struct dma_fence *wait_fence = NULL;
>>>>> + int r;
>>>>> +
>>>>> + kthread_park(sched->thread);
>>>>> + /*
>>>>> + * Verify all the signaled jobs in mirror list are removed from
>>>>> the ring
>>>>> + * by waiting for their respective scheduler fences to signal.
>>>>> + * Continually repeat traversing the ring mirror list until no
>>>>> more signaled
>>>>> + * fences are found
>>>>> + */
>>>>> +retry_wait:
>>>>> spin_lock_irqsave(&sched->job_list_lock, flags);
>>>>> list_for_each_entry_reverse(s_job, &sched->ring_mirror_list,
>>>>> node) {
>>>>> if (s_job->s_fence->parent &&
>>>>> @@ -357,35 +400,45 @@ void drm_sched_hw_job_reset(struct
>>>>> drm_gpu_scheduler *sched, struct drm_sched_jo
>>>>> dma_fence_put(s_job->s_fence->parent);
>>>>> s_job->s_fence->parent = NULL;
>>>>> atomic_dec(&sched->hw_rq_count);
>>>>> + } else {
>>>>> + wait_fence = dma_fence_get(&s_job->s_fence->finished);
>>>>> + last_job = s_job;
>>>>> + break;
>>>>> }
>>>>> }
>>>>> - spin_unlock_irqrestore(&sched->job_list_lock, flags);
>>>>> - if (bad && bad->s_priority != DRM_SCHED_PRIORITY_KERNEL) {
>>>>> - atomic_inc(&bad->karma);
>>>>> - /* don't increase @bad's karma if it's from KERNEL RQ,
>>>>> - * becuase sometimes GPU hang would cause kernel jobs (like
>>>>> VM updating jobs)
>>>>> - * corrupt but keep in mind that kernel jobs always
>>>>> considered good.
>>>>> - */
>>>>> - for (i = DRM_SCHED_PRIORITY_MIN; i <
>>>>> DRM_SCHED_PRIORITY_KERNEL; i++ ) {
>>>>> - struct drm_sched_rq *rq = &sched->sched_rq[i];
>>>>> + /* No signaled jobs in the ring, its safe to proceed to ASIC
>>>>> reset */
>>>>> + if (!wait_fence) {
>>>>> + spin_unlock_irqrestore(&sched->job_list_lock, flags);
>>>>> + goto done;
>>>>> + }
>>>>> - spin_lock(&rq->lock);
>>>>> - list_for_each_entry_safe(entity, tmp, &rq->entities,
>>>>> list) {
>>>>> - if (bad->s_fence->scheduled.context ==
>>>>> entity->fence_context) {
>>>>> - if (atomic_read(&bad->karma) >
>>>>> bad->sched->hang_limit)
>>>>> - if (entity->guilty)
>>>>> - atomic_set(entity->guilty, 1);
>>>>> - break;
>>>>> - }
>>>>> - }
>>>>> - spin_unlock(&rq->lock);
>>>>> - if (&entity->list != &rq->entities)
>>>>> - break;
>>>>> + /* Restore removed cb since removing again already removed cb is
>>>>> undefined */
>>>>> + list_for_each_entry_reverse(s_job, &sched->ring_mirror_list,
>>>>> node) {
>>>>> + if(s_job == last_job)
>>>>> + break;
>>>> Need to double check after the holidays, but you should be able to use
>>>> list_for_each_entry_continue here.
>>> I think it should work - kind of traversing back on all the jobs we just
>>> removed their callbacks.
>> Wrapping your head around stuff again after the holidays sometimes shows
>> new problems we have completely missed :)
>>
>> Adding the callbacks again won't work because we have freed up our
>> reference to the hardware fence above:
>>> dma_fence_put(s_job->s_fence->parent);
>>> s_job->s_fence->parent = NULL;
>> We need to drop this or we would never be able to re-add the fences
> Yea, that a big miss on my side...
>
>> .
>>
>> But I'm still not sure if we shouldn't rely on the correct order of
>> signaling and simplify this instead.
> As you said before, once we switched to signaling the parent from the
> interrupt context instead of scheduled work no danger of race there
Correction here - once we switched removing the job from mirror_ring
list directly in interrupt context instead later from scheduled work
Andrey
> , so
> what if we submit job A and after it job B and B completes before A
> (like the sync dependency test in libdrm amdgpu tests but without adding
> explicit dependency to the second command on the first) I believe that
> still in this case job B's parent (HW) fence will not be signaled before
> job A completes since EOP event is not signaled until the entire pipe
> completed and flushed it's cashes including job A. So from this seems to
> me that indeed it's enough to wait for the last inserted job's parent
> (HW) fence in ring mirror list to signal.
> Let me know what you think on that.
>
> P.S V5 is not the last iteration and there was V6 series.
>
> Andrey
>
>> Regards,
>> Christian.
>>
>>> Andrey
>>>
>>>>> +
>>>>> + if (s_job->s_fence->parent) {
>>>>> + r = dma_fence_add_callback(s_job->s_fence->parent,
>>>>> + &s_job->s_fence->cb,
>>>>> + drm_sched_process_job);
>>>>> + if (r)
>>>>> + DRM_ERROR("fence restore callback failed (%d)\n",
>>>>> + r);
>>>> When you fail to add the callback this means that you need to call
>>>> call drm_sched_process_job manually here.
>>>>
>>>>> }
>>>>> }
>>>>> + spin_unlock_irqrestore(&sched->job_list_lock, flags);
>>>>> +
>>>>> + dma_fence_wait(wait_fence, false);
>>>>> + dma_fence_put(wait_fence);
>>>>> + wait_fence = NULL;
>>>>> +
>>>>> + goto retry_wait;
>>>>> +
>>>>> +done:
>>>>> + return;
>>>> Drop the done: label and return directly above.
>>>>
>>>> Apart from all those nit picks that starts to look like it should work,
>>>> Christian.
>>>>
>>>>> }
>>>>> -EXPORT_SYMBOL(drm_sched_hw_job_reset);
>>>>> +EXPORT_SYMBOL(drm_sched_stop);
>>>>> /**
>>>>> * drm_sched_job_recovery - recover jobs after a reset
>>>>> @@ -393,33 +446,21 @@ EXPORT_SYMBOL(drm_sched_hw_job_reset);
>>>>> * @sched: scheduler instance
>>>>> *
>>>>> */
>>>>> -void drm_sched_job_recovery(struct drm_gpu_scheduler *sched)
>>>>> +void drm_sched_start(struct drm_gpu_scheduler *sched, bool
>>>>> full_recovery)
>>>>> {
>>>>> struct drm_sched_job *s_job, *tmp;
>>>>> - bool found_guilty = false;
>>>>> unsigned long flags;
>>>>> int r;
>>>>> + if (!full_recovery)
>>>>> + goto unpark;
>>>>> +
>>>>> spin_lock_irqsave(&sched->job_list_lock, flags);
>>>>> list_for_each_entry_safe(s_job, tmp, &sched->ring_mirror_list,
>>>>> node) {
>>>>> struct drm_sched_fence *s_fence = s_job->s_fence;
>>>>> - struct dma_fence *fence;
>>>>> - uint64_t guilty_context;
>>>>> -
>>>>> - if (!found_guilty && atomic_read(&s_job->karma) >
>>>>> sched->hang_limit) {
>>>>> - found_guilty = true;
>>>>> - guilty_context = s_job->s_fence->scheduled.context;
>>>>> - }
>>>>> -
>>>>> - if (found_guilty && s_job->s_fence->scheduled.context ==
>>>>> guilty_context)
>>>>> - dma_fence_set_error(&s_fence->finished, -ECANCELED);
>>>>> -
>>>>> - spin_unlock_irqrestore(&sched->job_list_lock, flags);
>>>>> - fence = sched->ops->run_job(s_job);
>>>>> - atomic_inc(&sched->hw_rq_count);
>>>>> + struct dma_fence *fence = s_job->s_fence->parent;
>>>>> if (fence) {
>>>>> - s_fence->parent = dma_fence_get(fence);
>>>>> r = dma_fence_add_callback(fence, &s_fence->cb,
>>>>> drm_sched_process_job);
>>>>> if (r == -ENOENT)
>>>>> @@ -427,18 +468,47 @@ void drm_sched_job_recovery(struct
>>>>> drm_gpu_scheduler *sched)
>>>>> else if (r)
>>>>> DRM_ERROR("fence add callback failed (%d)\n",
>>>>> r);
>>>>> - dma_fence_put(fence);
>>>>> - } else {
>>>>> - if (s_fence->finished.error < 0)
>>>>> - drm_sched_expel_job_unlocked(s_job);
>>>>> + } else
>>>>> drm_sched_process_job(NULL, &s_fence->cb);
>>>>> - }
>>>>> - spin_lock_irqsave(&sched->job_list_lock, flags);
>>>>> }
>>>>> +
>>>>> drm_sched_start_timeout(sched);
>>>>> spin_unlock_irqrestore(&sched->job_list_lock, flags);
>>>>> +
>>>>> +unpark:
>>>>> + kthread_unpark(sched->thread);
>>>>> +}
>>>>> +EXPORT_SYMBOL(drm_sched_start);
>>>>> +
>>>>> +/**
>>>>> + * drm_sched_resubmit_jobs - helper to relunch job from mirror ring
>>>>> list
>>>>> + *
>>>>> + * @sched: scheduler instance
>>>>> + *
>>>>> + */
>>>>> +void drm_sched_resubmit_jobs(struct drm_gpu_scheduler *sched)
>>>>> +{
>>>>> + struct drm_sched_job *s_job, *tmp;
>>>>> + uint64_t guilty_context;
>>>>> + bool found_guilty = false;
>>>>> +
>>>>> + /*TODO DO we need spinlock here ? */
>>>>> + list_for_each_entry_safe(s_job, tmp, &sched->ring_mirror_list,
>>>>> node) {
>>>>> + struct drm_sched_fence *s_fence = s_job->s_fence;
>>>>> +
>>>>> + if (!found_guilty && atomic_read(&s_job->karma) >
>>>>> sched->hang_limit) {
>>>>> + found_guilty = true;
>>>>> + guilty_context = s_job->s_fence->scheduled.context;
>>>>> + }
>>>>> +
>>>>> + if (found_guilty && s_job->s_fence->scheduled.context ==
>>>>> guilty_context)
>>>>> + dma_fence_set_error(&s_fence->finished, -ECANCELED);
>>>>> +
>>>>> + s_job->s_fence->parent = sched->ops->run_job(s_job);
>>>>> + atomic_inc(&sched->hw_rq_count);
>>>>> + }
>>>>> }
>>>>> -EXPORT_SYMBOL(drm_sched_job_recovery);
>>>>> +EXPORT_SYMBOL(drm_sched_resubmit_jobs);
>>>>> /**
>>>>> * drm_sched_job_init - init a scheduler job
>>>>> @@ -634,26 +704,14 @@ static int drm_sched_main(void *param)
>>>>> DRM_ERROR("fence add callback failed (%d)\n",
>>>>> r);
>>>>> dma_fence_put(fence);
>>>>> - } else {
>>>>> - if (s_fence->finished.error < 0)
>>>>> - drm_sched_expel_job_unlocked(sched_job);
>>>>> + } else
>>>>> drm_sched_process_job(NULL, &s_fence->cb);
>>>>> - }
>>>>> wake_up(&sched->job_scheduled);
>>>>> }
>>>>> return 0;
>>>>> }
>>>>> -static void drm_sched_expel_job_unlocked(struct drm_sched_job *s_job)
>>>>> -{
>>>>> - struct drm_gpu_scheduler *sched = s_job->sched;
>>>>> -
>>>>> - spin_lock(&sched->job_list_lock);
>>>>> - list_del_init(&s_job->node);
>>>>> - spin_unlock(&sched->job_list_lock);
>>>>> -}
>>>>> -
>>>>> /**
>>>>> * drm_sched_init - Init a gpu scheduler instance
>>>>> *
>>>>> diff --git a/drivers/gpu/drm/v3d/v3d_sched.c
>>>>> b/drivers/gpu/drm/v3d/v3d_sched.c
>>>>> index 445b2ef..f76d9ed 100644
>>>>> --- a/drivers/gpu/drm/v3d/v3d_sched.c
>>>>> +++ b/drivers/gpu/drm/v3d/v3d_sched.c
>>>>> @@ -178,18 +178,22 @@ v3d_job_timedout(struct drm_sched_job *sched_job)
>>>>> for (q = 0; q < V3D_MAX_QUEUES; q++) {
>>>>> struct drm_gpu_scheduler *sched = &v3d->queue[q].sched;
>>>>> - kthread_park(sched->thread);
>>>>> - drm_sched_hw_job_reset(sched, (sched_job->sched == sched ?
>>>>> + drm_sched_stop(sched, (sched_job->sched == sched ?
>>>>> sched_job : NULL));
>>>>> +
>>>>> + if(sched_job)
>>>>> + drm_sched_increase_karma(sched_job);
>>>>> }
>>>>> /* get the GPU back into the init state */
>>>>> v3d_reset(v3d);
>>>>> + for (q = 0; q < V3D_MAX_QUEUES; q++)
>>>>> + drm_sched_resubmit_jobs(sched_job->sched);
>>>>> +
>>>>> /* Unblock schedulers and restart their jobs. */
>>>>> for (q = 0; q < V3D_MAX_QUEUES; q++) {
>>>>> - drm_sched_job_recovery(&v3d->queue[q].sched);
>>>>> - kthread_unpark(v3d->queue[q].sched.thread);
>>>>> + drm_sched_start(&v3d->queue[q].sched, true);
>>>>> }
>>>>> mutex_unlock(&v3d->reset_lock);
>>>>> diff --git a/include/drm/gpu_scheduler.h b/include/drm/gpu_scheduler.h
>>>>> index 47e1979..5ab2d97 100644
>>>>> --- a/include/drm/gpu_scheduler.h
>>>>> +++ b/include/drm/gpu_scheduler.h
>>>>> @@ -175,6 +175,7 @@ struct drm_sched_fence *to_drm_sched_fence(struct
>>>>> dma_fence *f);
>>>>> * finished to remove the job from the
>>>>> * @drm_gpu_scheduler.ring_mirror_list.
>>>>> * @node: used to append this struct to the
>>>>> @drm_gpu_scheduler.ring_mirror_list.
>>>>> + * @finish_node: used in a list to wait on before resetting the
>>>>> scheduler
>>>>> * @id: a unique id assigned to each job scheduled on the scheduler.
>>>>> * @karma: increment on every hang caused by this job. If this
>>>>> exceeds the hang
>>>>> * limit of the scheduler then the job is marked guilty and
>>>>> will not
>>>>> @@ -193,6 +194,7 @@ struct drm_sched_job {
>>>>> struct dma_fence_cb finish_cb;
>>>>> struct work_struct finish_work;
>>>>> struct list_head node;
>>>>> + struct list_head finish_node;
>>>>> uint64_t id;
>>>>> atomic_t karma;
>>>>> enum drm_sched_priority s_priority;
>>>>> @@ -298,9 +300,11 @@ int drm_sched_job_init(struct drm_sched_job *job,
>>>>> void *owner);
>>>>> void drm_sched_job_cleanup(struct drm_sched_job *job);
>>>>> void drm_sched_wakeup(struct drm_gpu_scheduler *sched);
>>>>> -void drm_sched_hw_job_reset(struct drm_gpu_scheduler *sched,
>>>>> - struct drm_sched_job *job);
>>>>> -void drm_sched_job_recovery(struct drm_gpu_scheduler *sched);
>>>>> +void drm_sched_stop(struct drm_gpu_scheduler *sched,
>>>>> + struct drm_sched_job *job);
>>>>> +void drm_sched_start(struct drm_gpu_scheduler *sched, bool
>>>>> full_recovery);
>>>>> +void drm_sched_resubmit_jobs(struct drm_gpu_scheduler *sched);
>>>>> +void drm_sched_increase_karma(struct drm_sched_job *bad);
>>>>> bool drm_sched_dependency_optimized(struct dma_fence* fence,
>>>>> struct drm_sched_entity *entity);
>>>>> void drm_sched_fault(struct drm_gpu_scheduler *sched);
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