[PATCH 01/11] drm/sched: Split drm_sched_job_init

Christian König christian.koenig at amd.com
Thu Jun 24 17:39:26 UTC 2021



Am 24.06.21 um 19:37 schrieb Daniel Vetter:
> On Thu, Jun 24, 2021 at 7:30 PM Christian König
> <christian.koenig at amd.com> 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.

Christian.

> -Daniel
>
>> Christian.
>>
>>> Signed-off-by: Daniel Vetter <daniel.vetter at intel.com>
>>> Cc: Lucas Stach <l.stach at pengutronix.de>
>>> Cc: Russell King <linux+etnaviv at armlinux.org.uk>
>>> Cc: Christian Gmeiner <christian.gmeiner at gmail.com>
>>> Cc: Qiang Yu <yuq825 at gmail.com>
>>> Cc: Rob Herring <robh at kernel.org>
>>> Cc: Tomeu Vizoso <tomeu.vizoso at collabora.com>
>>> Cc: Steven Price <steven.price at arm.com>
>>> Cc: Alyssa Rosenzweig <alyssa.rosenzweig at collabora.com>
>>> Cc: David Airlie <airlied at linux.ie>
>>> Cc: Daniel Vetter <daniel at ffwll.ch>
>>> Cc: Sumit Semwal <sumit.semwal at linaro.org>
>>> Cc: "Christian König" <christian.koenig at amd.com>
>>> Cc: Masahiro Yamada <masahiroy at kernel.org>
>>> Cc: Kees Cook <keescook at chromium.org>
>>> Cc: Adam Borowski <kilobyte at angband.pl>
>>> Cc: Nick Terrell <terrelln at fb.com>
>>> Cc: Mauro Carvalho Chehab <mchehab+huawei at kernel.org>
>>> Cc: Paul Menzel <pmenzel at molgen.mpg.de>
>>> Cc: Sami Tolvanen <samitolvanen at google.com>
>>> Cc: Viresh Kumar <viresh.kumar at linaro.org>
>>> Cc: Alex Deucher <alexander.deucher at amd.com>
>>> Cc: Dave Airlie <airlied at redhat.com>
>>> Cc: Nirmoy Das <nirmoy.das at amd.com>
>>> Cc: Deepak R Varma <mh12gx2825 at gmail.com>
>>> Cc: Lee Jones <lee.jones at linaro.org>
>>> Cc: Kevin Wang <kevin1.wang at amd.com>
>>> Cc: Chen Li <chenli at uniontech.com>
>>> Cc: Luben Tuikov <luben.tuikov at amd.com>
>>> Cc: "Marek Olšák" <marek.olsak at amd.com>
>>> Cc: Dennis Li <Dennis.Li at amd.com>
>>> Cc: Maarten Lankhorst <maarten.lankhorst at linux.intel.com>
>>> Cc: Andrey Grodzovsky <andrey.grodzovsky at amd.com>
>>> Cc: Sonny Jiang <sonny.jiang at amd.com>
>>> Cc: Boris Brezillon <boris.brezillon at collabora.com>
>>> Cc: Tian Tao <tiantao6 at hisilicon.com>
>>> Cc: Jack Zhang <Jack.Zhang1 at amd.com>
>>> Cc: etnaviv at lists.freedesktop.org
>>> Cc: lima at lists.freedesktop.org
>>> Cc: linux-media at vger.kernel.org
>>> Cc: linaro-mm-sig at lists.linaro.org
>>> ---
>>>    .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);
>>>
>



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