On Thu, Jun 24, 2021 at 7:39 PM Christian König
<christian.koenig@xxxxxxx> wrote:
>
>
>
> Am 24.06.21 um 19:37 schrieb Daniel Vetter:
> > On Thu, Jun 24, 2021 at 7:30 PM Christian König
> > <christian.koenig@xxxxxxx> wrote:
> >> Am 24.06.21 um 16:00 schrieb Daniel Vetter:
> >>> This is a very confusingly named function, because not just does it
> >>> init an object, it arms it and provides a point of no return for
> >>> pushing a job into the scheduler. It would be nice if that's a bit
> >>> clearer in the interface.
> >> We originally had that in the push_job interface, but moved that to init
> >> for some reason I don't remember.
> >>
> >>> But the real reason is that I want to push the dependency tracking
> >>> helpers into the scheduler code, and that means drm_sched_job_init
> >>> must be called a lot earlier, without arming the job.
> >> I'm really questioning myself if I like that naming.
> >>
> >> What about using drm_sched_job_add_dependency instead?
> > You're suggesting a
> > s/drm_sched_job_init/drm_sched_job_add_dependency/, or just replied to
> > the wrong patch?
>
> Replied to the wrong patch accidentally. I was talking about the "await"
> terminology.
Can you pls reply there so we don't have too much of a confusion in
the discussion?
Thanks, Daniel
> Christian.
>
> > -Daniel
> >
> >> Christian.
> >>
> >>> Signed-off-by: Daniel Vetter <daniel.vetter@xxxxxxxxx>
> >>> Cc: Lucas Stach <l.stach@xxxxxxxxxxxxxx>
> >>> Cc: Russell King <linux+etnaviv@xxxxxxxxxxxxxxx>
> >>> Cc: Christian Gmeiner <christian.gmeiner@xxxxxxxxx>
> >>> Cc: Qiang Yu <yuq825@xxxxxxxxx>
> >>> Cc: Rob Herring <robh@xxxxxxxxxx>
> >>> Cc: Tomeu Vizoso <tomeu.vizoso@xxxxxxxxxxxxx>
> >>> Cc: Steven Price <steven.price@xxxxxxx>
> >>> Cc: Alyssa Rosenzweig <alyssa.rosenzweig@xxxxxxxxxxxxx>
> >>> Cc: David Airlie <airlied@xxxxxxxx>
> >>> Cc: Daniel Vetter <daniel@xxxxxxxx>
> >>> Cc: Sumit Semwal <sumit.semwal@xxxxxxxxxx>
> >>> Cc: "Christian König" <christian.koenig@xxxxxxx>
> >>> Cc: Masahiro Yamada <masahiroy@xxxxxxxxxx>
> >>> Cc: Kees Cook <keescook@xxxxxxxxxxxx>
> >>> Cc: Adam Borowski <kilobyte@xxxxxxxxxx>
> >>> Cc: Nick Terrell <terrelln@xxxxxx>
> >>> Cc: Mauro Carvalho Chehab <mchehab+huawei@xxxxxxxxxx>
> >>> Cc: Paul Menzel <pmenzel@xxxxxxxxxxxxx>
> >>> Cc: Sami Tolvanen <samitolvanen@xxxxxxxxxx>
> >>> Cc: Viresh Kumar <viresh.kumar@xxxxxxxxxx>
> >>> Cc: Alex Deucher <alexander.deucher@xxxxxxx>
> >>> Cc: Dave Airlie <airlied@xxxxxxxxxx>
> >>> Cc: Nirmoy Das <nirmoy.das@xxxxxxx>
> >>> Cc: Deepak R Varma <mh12gx2825@xxxxxxxxx>
> >>> Cc: Lee Jones <lee.jones@xxxxxxxxxx>
> >>> Cc: Kevin Wang <kevin1.wang@xxxxxxx>
> >>> Cc: Chen Li <chenli@xxxxxxxxxxxxx>
> >>> Cc: Luben Tuikov <luben.tuikov@xxxxxxx>
> >>> Cc: "Marek Olšák" <marek.olsak@xxxxxxx>
> >>> Cc: Dennis Li <Dennis.Li@xxxxxxx>
> >>> Cc: Maarten Lankhorst <maarten.lankhorst@xxxxxxxxxxxxxxx>
> >>> Cc: Andrey Grodzovsky <andrey.grodzovsky@xxxxxxx>
> >>> Cc: Sonny Jiang <sonny.jiang@xxxxxxx>
> >>> Cc: Boris Brezillon <boris.brezillon@xxxxxxxxxxxxx>
> >>> Cc: Tian Tao <tiantao6@xxxxxxxxxxxxx>
> >>> Cc: Jack Zhang <Jack.Zhang1@xxxxxxx>
> >>> Cc: etnaviv@xxxxxxxxxxxxxxxxxxxxx
> >>> Cc: lima@xxxxxxxxxxxxxxxxxxxxx
> >>> Cc: linux-media@xxxxxxxxxxxxxxx
> >>> Cc: linaro-mm-sig@xxxxxxxxxxxxxxxx
> >>> ---
> >>> .gitignore | 1 +
> >>> drivers/gpu/drm/amd/amdgpu/amdgpu_cs.c | 2 ++
> >>> drivers/gpu/drm/amd/amdgpu/amdgpu_job.c | 2 ++
> >>> drivers/gpu/drm/etnaviv/etnaviv_sched.c | 2 ++
> >>> drivers/gpu/drm/lima/lima_sched.c | 2 ++
> >>> drivers/gpu/drm/panfrost/panfrost_job.c | 2 ++
> >>> drivers/gpu/drm/scheduler/sched_entity.c | 6 +++---
> >>> drivers/gpu/drm/scheduler/sched_fence.c | 15 ++++++++++-----
> >>> drivers/gpu/drm/scheduler/sched_main.c | 23 ++++++++++++++++++++++-
> >>> include/drm/gpu_scheduler.h | 6 +++++-
> >>> 10 files changed, 51 insertions(+), 10 deletions(-)
> >>>
> >>> diff --git a/.gitignore b/.gitignore
> >>> index 7afd412dadd2..52433a930299 100644
> >>> --- a/.gitignore
> >>> +++ b/.gitignore
> >>> @@ -66,6 +66,7 @@ modules.order
> >>> /modules.builtin
> >>> /modules.builtin.modinfo
> >>> /modules.nsdeps
> >>> +*.builtin
> >>>
> >>> #
> >>> # RPM spec file (make rpm-pkg)
> >>> diff --git a/drivers/gpu/drm/amd/amdgpu/amdgpu_cs.c b/drivers/gpu/drm/amd/amdgpu/amdgpu_cs.c
> >>> index c5386d13eb4a..a4ec092af9a7 100644
> >>> --- a/drivers/gpu/drm/amd/amdgpu/amdgpu_cs.c
> >>> +++ b/drivers/gpu/drm/amd/amdgpu/amdgpu_cs.c
> >>> @@ -1226,6 +1226,8 @@ static int amdgpu_cs_submit(struct amdgpu_cs_parser *p,
> >>> if (r)
> >>> goto error_unlock;
> >>>
> >>> + drm_sched_job_arm(&job->base);
> >>> +
> >>> /* No memory allocation is allowed while holding the notifier lock.
> >>> * The lock is held until amdgpu_cs_submit is finished and fence is
> >>> * added to BOs.
> >>> diff --git a/drivers/gpu/drm/amd/amdgpu/amdgpu_job.c b/drivers/gpu/drm/amd/amdgpu/amdgpu_job.c
> >>> index d33e6d97cc89..5ddb955d2315 100644
> >>> --- a/drivers/gpu/drm/amd/amdgpu/amdgpu_job.c
> >>> +++ b/drivers/gpu/drm/amd/amdgpu/amdgpu_job.c
> >>> @@ -170,6 +170,8 @@ int amdgpu_job_submit(struct amdgpu_job *job, struct drm_sched_entity *entity,
> >>> if (r)
> >>> return r;
> >>>
> >>> + drm_sched_job_arm(&job->base);
> >>> +
> >>> *f = dma_fence_get(&job->base.s_fence->finished);
> >>> amdgpu_job_free_resources(job);
> >>> drm_sched_entity_push_job(&job->base, entity);
> >>> diff --git a/drivers/gpu/drm/etnaviv/etnaviv_sched.c b/drivers/gpu/drm/etnaviv/etnaviv_sched.c
> >>> index 19826e504efc..af1671f01c7f 100644
> >>> --- a/drivers/gpu/drm/etnaviv/etnaviv_sched.c
> >>> +++ b/drivers/gpu/drm/etnaviv/etnaviv_sched.c
> >>> @@ -163,6 +163,8 @@ int etnaviv_sched_push_job(struct drm_sched_entity *sched_entity,
> >>> if (ret)
> >>> goto out_unlock;
> >>>
> >>> + drm_sched_job_arm(&submit->sched_job);
> >>> +
> >>> submit->out_fence = dma_fence_get(&submit->sched_job.s_fence->finished);
> >>> submit->out_fence_id = idr_alloc_cyclic(&submit->gpu->fence_idr,
> >>> submit->out_fence, 0,
> >>> diff --git a/drivers/gpu/drm/lima/lima_sched.c b/drivers/gpu/drm/lima/lima_sched.c
> >>> index ecf3267334ff..bd1af1fd8c0f 100644
> >>> --- a/drivers/gpu/drm/lima/lima_sched.c
> >>> +++ b/drivers/gpu/drm/lima/lima_sched.c
> >>> @@ -129,6 +129,8 @@ int lima_sched_task_init(struct lima_sched_task *task,
> >>> return err;
> >>> }
> >>>
> >>> + drm_sched_job_arm(&task->base);
> >>> +
> >>> task->num_bos = num_bos;
> >>> task->vm = lima_vm_get(vm);
> >>>
> >>> diff --git a/drivers/gpu/drm/panfrost/panfrost_job.c b/drivers/gpu/drm/panfrost/panfrost_job.c
> >>> index beb62c8fc851..1e950534b9b0 100644
> >>> --- a/drivers/gpu/drm/panfrost/panfrost_job.c
> >>> +++ b/drivers/gpu/drm/panfrost/panfrost_job.c
> >>> @@ -244,6 +244,8 @@ int panfrost_job_push(struct panfrost_job *job)
> >>> goto unlock;
> >>> }
> >>>
> >>> + drm_sched_job_arm(&job->base);
> >>> +
> >>> job->render_done_fence = dma_fence_get(&job->base.s_fence->finished);
> >>>
> >>> ret = panfrost_acquire_object_fences(job->bos, job->bo_count,
> >>> diff --git a/drivers/gpu/drm/scheduler/sched_entity.c b/drivers/gpu/drm/scheduler/sched_entity.c
> >>> index 79554aa4dbb1..f7347c284886 100644
> >>> --- a/drivers/gpu/drm/scheduler/sched_entity.c
> >>> +++ b/drivers/gpu/drm/scheduler/sched_entity.c
> >>> @@ -485,9 +485,9 @@ void drm_sched_entity_select_rq(struct drm_sched_entity *entity)
> >>> * @sched_job: job to submit
> >>> * @entity: scheduler entity
> >>> *
> >>> - * Note: To guarantee that the order of insertion to queue matches
> >>> - * the job's fence sequence number this function should be
> >>> - * called with drm_sched_job_init under common lock.
> >>> + * Note: To guarantee that the order of insertion to queue matches the job's
> >>> + * fence sequence number this function should be called with drm_sched_job_arm()
> >>> + * under common lock.
> >>> *
> >>> * Returns 0 for success, negative error code otherwise.
> >>> */
> >>> diff --git a/drivers/gpu/drm/scheduler/sched_fence.c b/drivers/gpu/drm/scheduler/sched_fence.c
> >>> index 69de2c76731f..0ba810c198bd 100644
> >>> --- a/drivers/gpu/drm/scheduler/sched_fence.c
> >>> +++ b/drivers/gpu/drm/scheduler/sched_fence.c
> >>> @@ -152,11 +152,10 @@ struct drm_sched_fence *to_drm_sched_fence(struct dma_fence *f)
> >>> }
> >>> EXPORT_SYMBOL(to_drm_sched_fence);
> >>>
> >>> -struct drm_sched_fence *drm_sched_fence_create(struct drm_sched_entity *entity,
> >>> - void *owner)
> >>> +struct drm_sched_fence *drm_sched_fence_alloc(struct drm_sched_entity *entity,
> >>> + void *owner)
> >>> {
> >>> struct drm_sched_fence *fence = NULL;
> >>> - unsigned seq;
> >>>
> >>> fence = kmem_cache_zalloc(sched_fence_slab, GFP_KERNEL);
> >>> if (fence == NULL)
> >>> @@ -166,13 +165,19 @@ struct drm_sched_fence *drm_sched_fence_create(struct drm_sched_entity *entity,
> >>> fence->sched = entity->rq->sched;
> >>> spin_lock_init(&fence->lock);
> >>>
> >>> + return fence;
> >>> +}
> >>> +
> >>> +void drm_sched_fence_init(struct drm_sched_fence *fence,
> >>> + struct drm_sched_entity *entity)
> >>> +{
> >>> + unsigned seq;
> >>> +
> >>> seq = atomic_inc_return(&entity->fence_seq);
> >>> dma_fence_init(&fence->scheduled, &drm_sched_fence_ops_scheduled,
> >>> &fence->lock, entity->fence_context, seq);
> >>> dma_fence_init(&fence->finished, &drm_sched_fence_ops_finished,
> >>> &fence->lock, entity->fence_context + 1, seq);
> >>> -
> >>> - return fence;
> >>> }
> >>>
> >>> module_init(drm_sched_fence_slab_init);
> >>> diff --git a/drivers/gpu/drm/scheduler/sched_main.c b/drivers/gpu/drm/scheduler/sched_main.c
> >>> index 61420a9c1021..70eefed17e06 100644
> >>> --- a/drivers/gpu/drm/scheduler/sched_main.c
> >>> +++ b/drivers/gpu/drm/scheduler/sched_main.c
> >>> @@ -48,9 +48,11 @@
> >>> #include <linux/wait.h>
> >>> #include <linux/sched.h>
> >>> #include <linux/completion.h>
> >>> +#include <linux/dma-resv.h>
> >>> #include <uapi/linux/sched/types.h>
> >>>
> >>> #include <drm/drm_print.h>
> >>> +#include <drm/drm_gem.h>
> >>> #include <drm/gpu_scheduler.h>
> >>> #include <drm/spsc_queue.h>
> >>>
> >>> @@ -594,7 +596,7 @@ int drm_sched_job_init(struct drm_sched_job *job,
> >>> job->sched = sched;
> >>> job->entity = entity;
> >>> job->s_priority = entity->rq - sched->sched_rq;
> >>> - job->s_fence = drm_sched_fence_create(entity, owner);
> >>> + job->s_fence = drm_sched_fence_alloc(entity, owner);
> >>> if (!job->s_fence)
> >>> return -ENOMEM;
> >>> job->id = atomic64_inc_return(&sched->job_id_count);
> >>> @@ -605,6 +607,25 @@ int drm_sched_job_init(struct drm_sched_job *job,
> >>> }
> >>> EXPORT_SYMBOL(drm_sched_job_init);
> >>>
> >>> +/**
> >>> + * drm_sched_job_arm - arm a scheduler job for execution
> >>> + * @job: scheduler job to arm
> >>> + *
> >>> + * This arms a scheduler job for execution. Specifically it initializes the
> >>> + * &drm_sched_job.s_fence of @job, so that it can be attached to struct dma_resv
> >>> + * or other places that need to track the completion of this job.
> >>> + *
> >>> + * Refer to drm_sched_entity_push_job() documentation for locking
> >>> + * considerations.
> >>> + *
> >>> + * This can only be called if drm_sched_job_init() succeeded.
> >>> + */
> >>> +void drm_sched_job_arm(struct drm_sched_job *job)
> >>> +{
> >>> + drm_sched_fence_init(job->s_fence, job->entity);
> >>> +}
> >>> +EXPORT_SYMBOL(drm_sched_job_arm);
> >>> +
> >>> /**
> >>> * drm_sched_job_cleanup - clean up scheduler job resources
> >>> *
> >>> diff --git a/include/drm/gpu_scheduler.h b/include/drm/gpu_scheduler.h
> >>> index d18af49fd009..80438d126c9d 100644
> >>> --- a/include/drm/gpu_scheduler.h
> >>> +++ b/include/drm/gpu_scheduler.h
> >>> @@ -313,6 +313,7 @@ void drm_sched_fini(struct drm_gpu_scheduler *sched);
> >>> int drm_sched_job_init(struct drm_sched_job *job,
> >>> struct drm_sched_entity *entity,
> >>> void *owner);
> >>> +void drm_sched_job_arm(struct drm_sched_job *job);
> >>> void drm_sched_entity_modify_sched(struct drm_sched_entity *entity,
> >>> struct drm_gpu_scheduler **sched_list,
> >>> unsigned int num_sched_list);
> >>> @@ -352,8 +353,11 @@ void drm_sched_entity_set_priority(struct drm_sched_entity *entity,
> >>> enum drm_sched_priority priority);
> >>> bool drm_sched_entity_is_ready(struct drm_sched_entity *entity);
> >>>
> >>> -struct drm_sched_fence *drm_sched_fence_create(
> >>> +struct drm_sched_fence *drm_sched_fence_alloc(
> >>> struct drm_sched_entity *s_entity, void *owner);
> >>> +void drm_sched_fence_init(struct drm_sched_fence *fence,
> >>> + struct drm_sched_entity *entity);
> >>> +
> >>> void drm_sched_fence_scheduled(struct drm_sched_fence *fence);
> >>> void drm_sched_fence_finished(struct drm_sched_fence *fence);
> >>>
> >
>
--
Daniel Vetter
Software Engineer, Intel Corporation
http://blog.ffwll.ch
