On 2020-11-25 04:47, Christian König wrote:
> Am 25.11.20 um 04:17 schrieb Luben Tuikov:
>> Rename "ring_mirror_list" to "pending_list",
>> to describe what something is, not what it does,
>> how it's used, or how the hardware implements it.
>>
>> This also abstracts the actual hardware
>> implementation, i.e. how the low-level driver
>> communicates with the device it drives, ring, CAM,
>> etc., shouldn't be exposed to DRM.
>>
>> The pending_list keeps jobs submitted, which are
>> out of our control. Usually this means they are
>> pending execution status in hardware, but the
>> latter definition is a more general (inclusive)
>> definition.
>>
>> Signed-off-by: Luben Tuikov <luben.tuikov@xxxxxxx>
>
> In general the rename is a good idea, but I think we should try to
> remove this linked list in general.
>
> As the original name described this is essentially a ring buffer, the is
> no reason I can see to use a linked list here except for the add/remove
> madness we currently have.
>
> Anyway patch is Acked-by: Christian König <christian.koenig@xxxxxxx> for
> now.
Thanks for the Ack Christian.
Well this list is there now and I don't want to change too many
things or this patch would get out of hand.
Yeah, in the future, perhaps we can overhaul and change this. For now
this is a minimal rename-only patch.
Thanks,
Luben
>
> Regards,
> Christian.
>
>> ---
>> drivers/gpu/drm/amd/amdgpu/amdgpu_debugfs.c | 4 +--
>> drivers/gpu/drm/amd/amdgpu/amdgpu_device.c | 4 +--
>> drivers/gpu/drm/amd/amdgpu/amdgpu_job.c | 2 +-
>> drivers/gpu/drm/scheduler/sched_main.c | 34 ++++++++++-----------
>> include/drm/gpu_scheduler.h | 10 +++---
>> 5 files changed, 27 insertions(+), 27 deletions(-)
>>
>> diff --git a/drivers/gpu/drm/amd/amdgpu/amdgpu_debugfs.c b/drivers/gpu/drm/amd/amdgpu/amdgpu_debugfs.c
>> index 8358cae0b5a4..db77a5bdfa45 100644
>> --- a/drivers/gpu/drm/amd/amdgpu/amdgpu_debugfs.c
>> +++ b/drivers/gpu/drm/amd/amdgpu/amdgpu_debugfs.c
>> @@ -1427,7 +1427,7 @@ static void amdgpu_ib_preempt_job_recovery(struct drm_gpu_scheduler *sched)
>> struct dma_fence *fence;
>>
>> spin_lock(&sched->job_list_lock);
>> - list_for_each_entry(s_job, &sched->ring_mirror_list, list) {
>> + list_for_each_entry(s_job, &sched->pending_list, list) {
>> fence = sched->ops->run_job(s_job);
>> dma_fence_put(fence);
>> }
>> @@ -1459,7 +1459,7 @@ static void amdgpu_ib_preempt_mark_partial_job(struct amdgpu_ring *ring)
>>
>> no_preempt:
>> spin_lock(&sched->job_list_lock);
>> - list_for_each_entry_safe(s_job, tmp, &sched->ring_mirror_list, list) {
>> + list_for_each_entry_safe(s_job, tmp, &sched->pending_list, list) {
>> if (dma_fence_is_signaled(&s_job->s_fence->finished)) {
>> /* remove job from ring_mirror_list */
>> list_del_init(&s_job->list);
>> diff --git a/drivers/gpu/drm/amd/amdgpu/amdgpu_device.c b/drivers/gpu/drm/amd/amdgpu/amdgpu_device.c
>> index 4df6de81cd41..fbae600aa5f9 100644
>> --- a/drivers/gpu/drm/amd/amdgpu/amdgpu_device.c
>> +++ b/drivers/gpu/drm/amd/amdgpu/amdgpu_device.c
>> @@ -4127,8 +4127,8 @@ bool amdgpu_device_has_job_running(struct amdgpu_device *adev)
>> continue;
>>
>> spin_lock(&ring->sched.job_list_lock);
>> - job = list_first_entry_or_null(&ring->sched.ring_mirror_list,
>> - struct drm_sched_job, list);
>> + job = list_first_entry_or_null(&ring->sched.pending_list,
>> + struct drm_sched_job, list);
>> spin_unlock(&ring->sched.job_list_lock);
>> if (job)
>> return true;
>> diff --git a/drivers/gpu/drm/amd/amdgpu/amdgpu_job.c b/drivers/gpu/drm/amd/amdgpu/amdgpu_job.c
>> index aca52a46b93d..ff48101bab55 100644
>> --- a/drivers/gpu/drm/amd/amdgpu/amdgpu_job.c
>> +++ b/drivers/gpu/drm/amd/amdgpu/amdgpu_job.c
>> @@ -271,7 +271,7 @@ void amdgpu_job_stop_all_jobs_on_sched(struct drm_gpu_scheduler *sched)
>> }
>>
>> /* Signal all jobs already scheduled to HW */
>> - list_for_each_entry(s_job, &sched->ring_mirror_list, list) {
>> + list_for_each_entry(s_job, &sched->pending_list, list) {
>> struct drm_sched_fence *s_fence = s_job->s_fence;
>>
>> dma_fence_set_error(&s_fence->finished, -EHWPOISON);
>> diff --git a/drivers/gpu/drm/scheduler/sched_main.c b/drivers/gpu/drm/scheduler/sched_main.c
>> index c52eba407ebd..b694df12aaba 100644
>> --- a/drivers/gpu/drm/scheduler/sched_main.c
>> +++ b/drivers/gpu/drm/scheduler/sched_main.c
>> @@ -198,7 +198,7 @@ EXPORT_SYMBOL(drm_sched_dependency_optimized);
>> static void drm_sched_start_timeout(struct drm_gpu_scheduler *sched)
>> {
>> if (sched->timeout != MAX_SCHEDULE_TIMEOUT &&
>> - !list_empty(&sched->ring_mirror_list))
>> + !list_empty(&sched->pending_list))
>> schedule_delayed_work(&sched->work_tdr, sched->timeout);
>> }
>>
>> @@ -258,7 +258,7 @@ void drm_sched_resume_timeout(struct drm_gpu_scheduler *sched,
>> {
>> spin_lock(&sched->job_list_lock);
>>
>> - if (list_empty(&sched->ring_mirror_list))
>> + if (list_empty(&sched->pending_list))
>> cancel_delayed_work(&sched->work_tdr);
>> else
>> mod_delayed_work(system_wq, &sched->work_tdr, remaining);
>> @@ -272,7 +272,7 @@ static void drm_sched_job_begin(struct drm_sched_job *s_job)
>> struct drm_gpu_scheduler *sched = s_job->sched;
>>
>> spin_lock(&sched->job_list_lock);
>> - list_add_tail(&s_job->list, &sched->ring_mirror_list);
>> + list_add_tail(&s_job->list, &sched->pending_list);
>> drm_sched_start_timeout(sched);
>> spin_unlock(&sched->job_list_lock);
>> }
>> @@ -286,7 +286,7 @@ static void drm_sched_job_timedout(struct work_struct *work)
>>
>> /* Protects against concurrent deletion in drm_sched_get_cleanup_job */
>> spin_lock(&sched->job_list_lock);
>> - job = list_first_entry_or_null(&sched->ring_mirror_list,
>> + job = list_first_entry_or_null(&sched->pending_list,
>> struct drm_sched_job, list);
>>
>> if (job) {
>> @@ -371,7 +371,7 @@ EXPORT_SYMBOL(drm_sched_increase_karma);
>> * Stop the scheduler and also removes and frees all completed jobs.
>> * Note: bad job will not be freed as it might be used later and so it's
>> * callers responsibility to release it manually if it's not part of the
>> - * mirror list any more.
>> + * pending list any more.
>> *
>> */
>> void drm_sched_stop(struct drm_gpu_scheduler *sched, struct drm_sched_job *bad)
>> @@ -392,15 +392,15 @@ void drm_sched_stop(struct drm_gpu_scheduler *sched, struct drm_sched_job *bad)
>> * Add at the head of the queue to reflect it was the earliest
>> * job extracted.
>> */
>> - list_add(&bad->list, &sched->ring_mirror_list);
>> + list_add(&bad->list, &sched->pending_list);
>>
>> /*
>> * Iterate the job list from later to earlier one and either deactive
>> - * their HW callbacks or remove them from mirror list if they already
>> + * their HW callbacks or remove them from pending list if they already
>> * signaled.
>> * This iteration is thread safe as sched thread is stopped.
>> */
>> - list_for_each_entry_safe_reverse(s_job, tmp, &sched->ring_mirror_list,
>> + list_for_each_entry_safe_reverse(s_job, tmp, &sched->pending_list,
>> list) {
>> if (s_job->s_fence->parent &&
>> dma_fence_remove_callback(s_job->s_fence->parent,
>> @@ -408,7 +408,7 @@ void drm_sched_stop(struct drm_gpu_scheduler *sched, struct drm_sched_job *bad)
>> atomic_dec(&sched->hw_rq_count);
>> } else {
>> /*
>> - * remove job from ring_mirror_list.
>> + * remove job from pending_list.
>> * Locking here is for concurrent resume timeout
>> */
>> spin_lock(&sched->job_list_lock);
>> @@ -463,7 +463,7 @@ void drm_sched_start(struct drm_gpu_scheduler *sched, bool full_recovery)
>> * so no new jobs are being inserted or removed. Also concurrent
>> * GPU recovers can't run in parallel.
>> */
>> - list_for_each_entry_safe(s_job, tmp, &sched->ring_mirror_list, list) {
>> + list_for_each_entry_safe(s_job, tmp, &sched->pending_list, list) {
>> struct dma_fence *fence = s_job->s_fence->parent;
>>
>> atomic_inc(&sched->hw_rq_count);
>> @@ -494,7 +494,7 @@ void drm_sched_start(struct drm_gpu_scheduler *sched, bool full_recovery)
>> EXPORT_SYMBOL(drm_sched_start);
>>
>> /**
>> - * drm_sched_resubmit_jobs - helper to relunch job from mirror ring list
>> + * drm_sched_resubmit_jobs - helper to relunch job from pending ring list
>> *
>> * @sched: scheduler instance
>> *
>> @@ -506,7 +506,7 @@ void drm_sched_resubmit_jobs(struct drm_gpu_scheduler *sched)
>> bool found_guilty = false;
>> struct dma_fence *fence;
>>
>> - list_for_each_entry_safe(s_job, tmp, &sched->ring_mirror_list, list) {
>> + list_for_each_entry_safe(s_job, tmp, &sched->pending_list, list) {
>> struct drm_sched_fence *s_fence = s_job->s_fence;
>>
>> if (!found_guilty && atomic_read(&s_job->karma) > sched->hang_limit) {
>> @@ -665,7 +665,7 @@ static void drm_sched_process_job(struct dma_fence *f, struct dma_fence_cb *cb)
>> *
>> * @sched: scheduler instance
>> *
>> - * Returns the next finished job from the mirror list (if there is one)
>> + * Returns the next finished job from the pending list (if there is one)
>> * ready for it to be destroyed.
>> */
>> static struct drm_sched_job *
>> @@ -675,7 +675,7 @@ drm_sched_get_cleanup_job(struct drm_gpu_scheduler *sched)
>>
>> /*
>> * Don't destroy jobs while the timeout worker is running OR thread
>> - * is being parked and hence assumed to not touch ring_mirror_list
>> + * is being parked and hence assumed to not touch pending_list
>> */
>> if ((sched->timeout != MAX_SCHEDULE_TIMEOUT &&
>> !cancel_delayed_work(&sched->work_tdr)) ||
>> @@ -684,11 +684,11 @@ drm_sched_get_cleanup_job(struct drm_gpu_scheduler *sched)
>>
>> spin_lock(&sched->job_list_lock);
>>
>> - job = list_first_entry_or_null(&sched->ring_mirror_list,
>> + job = list_first_entry_or_null(&sched->pending_list,
>> struct drm_sched_job, list);
>>
>> if (job && dma_fence_is_signaled(&job->s_fence->finished)) {
>> - /* remove job from ring_mirror_list */
>> + /* remove job from pending_list */
>> list_del_init(&job->list);
>> } else {
>> job = NULL;
>> @@ -858,7 +858,7 @@ int drm_sched_init(struct drm_gpu_scheduler *sched,
>>
>> init_waitqueue_head(&sched->wake_up_worker);
>> init_waitqueue_head(&sched->job_scheduled);
>> - INIT_LIST_HEAD(&sched->ring_mirror_list);
>> + INIT_LIST_HEAD(&sched->pending_list);
>> spin_lock_init(&sched->job_list_lock);
>> atomic_set(&sched->hw_rq_count, 0);
>> INIT_DELAYED_WORK(&sched->work_tdr, drm_sched_job_timedout);
>> diff --git a/include/drm/gpu_scheduler.h b/include/drm/gpu_scheduler.h
>> index 3add0072bd37..2e0c368e19f6 100644
>> --- a/include/drm/gpu_scheduler.h
>> +++ b/include/drm/gpu_scheduler.h
>> @@ -174,7 +174,7 @@ struct drm_sched_fence *to_drm_sched_fence(struct dma_fence *f);
>> * @sched: the scheduler instance on which this job is scheduled.
>> * @s_fence: contains the fences for the scheduling of job.
>> * @finish_cb: the callback for the finished fence.
>> - * @node: used to append this struct to the @drm_gpu_scheduler.ring_mirror_list.
>> + * @node: used to append this struct to the @drm_gpu_scheduler.pending_list.
>> * @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
>> @@ -203,7 +203,7 @@ struct drm_sched_job {
>> static inline bool drm_sched_invalidate_job(struct drm_sched_job *s_job,
>> int threshold)
>> {
>> - return (s_job && atomic_inc_return(&s_job->karma) > threshold);
>> + return s_job && atomic_inc_return(&s_job->karma) > threshold;
>> }
>>
>> /**
>> @@ -260,8 +260,8 @@ struct drm_sched_backend_ops {
>> * @work_tdr: schedules a delayed call to @drm_sched_job_timedout after the
>> * timeout interval is over.
>> * @thread: the kthread on which the scheduler which run.
>> - * @ring_mirror_list: the list of jobs which are currently in the job queue.
>> - * @job_list_lock: lock to protect the ring_mirror_list.
>> + * @pending_list: the list of jobs which are currently in the job queue.
>> + * @job_list_lock: lock to protect the pending_list.
>> * @hang_limit: once the hangs by a job crosses this limit then it is marked
>> * guilty and it will be considered for scheduling further.
>> * @score: score to help loadbalancer pick a idle sched
>> @@ -282,7 +282,7 @@ struct drm_gpu_scheduler {
>> atomic64_t job_id_count;
>> struct delayed_work work_tdr;
>> struct task_struct *thread;
>> - struct list_head ring_mirror_list;
>> + struct list_head pending_list;
>> spinlock_t job_list_lock;
>> int hang_limit;
>> atomic_t score;
>
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