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.

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.

v2:
- don't change .gitignore (Steven)
- don't forget v3d (Emma)

Acked-by: Steven Price <steven.price@arm.com>
Signed-off-by: Daniel Vetter <redacted>
Cc: Lucas Stach <l.stach@pengutronix.de>
Cc: Russell King <linux+etnaviv@armlinux.org.uk>
Cc: Christian Gmeiner <christian.gmeiner@gmail.com>
Cc: Qiang Yu <yuq825@gmail.com>
Cc: Rob Herring <robh@kernel.org>
Cc: Tomeu Vizoso <redacted>
Cc: Steven Price <steven.price@arm.com>
Cc: Alyssa Rosenzweig <redacted>
Cc: David Airlie <redacted>
Cc: Daniel Vetter <redacted>
Cc: Sumit Semwal <sumit.semwal@linaro.org>
Cc: "Christian König" <christian.koenig@amd.com>
Cc: Masahiro Yamada <masahiroy@kernel.org>
Cc: Kees Cook <redacted>
Cc: Adam Borowski <redacted>
Cc: Nick Terrell <terrelln@fb.com>
Cc: Mauro Carvalho Chehab <mchehab+huawei@kernel.org>
Cc: Paul Menzel <redacted>
Cc: Sami Tolvanen <samitolvanen@google.com>
Cc: Viresh Kumar <viresh.kumar@linaro.org>
Cc: Alex Deucher <alexander.deucher@amd.com>
Cc: Dave Airlie <airlied@redhat.com>
Cc: Nirmoy Das <redacted>
Cc: Deepak R Varma <redacted>
Cc: Lee Jones <redacted>
Cc: Kevin Wang <redacted>
Cc: Chen Li <redacted>
Cc: Luben Tuikov <redacted>
Cc: "Marek Olšák" <redacted>
Cc: Dennis Li <redacted>
Cc: Maarten Lankhorst <maarten.lankhorst@linux.intel.com>
Cc: Andrey Grodzovsky <redacted>
Cc: Sonny Jiang <redacted>
Cc: Boris Brezillon <boris.brezillon@collabora.com>
Cc: Tian Tao <tiantao6@hisilicon.com>
Cc: Jack Zhang <redacted>
Cc: etnaviv@lists.freedesktop.org
Cc: lima@lists.freedesktop.org
Cc: linux-media@vger.kernel.org
Cc: linaro-mm-sig@lists.linaro.org
Cc: Emma Anholt <redacted>
---
 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 ++++++++++++++++++++++-
 drivers/gpu/drm/v3d/v3d_gem.c            |  2 ++
 include/drm/gpu_scheduler.h              |  6 +++++-
 10 files changed, 52 insertions(+), 10 deletions(-)

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;
+}

+EXPORT_SYMBOL(drm_sched_job_arm);
+
 /**
  * drm_sched_job_cleanup - clean up scheduler job resources
  *

diff --git a/drivers/gpu/drm/v3d/v3d_gem.c b/drivers/gpu/drm/v3d/v3d_gem.c
index 4eb354226972..5c3a99027ecd 100644
--- a/drivers/gpu/drm/v3d/v3d_gem.c
+++ b/drivers/gpu/drm/v3d/v3d_gem.c

@@ -475,6 +475,8 @@ v3d_push_job(struct v3d_file_priv *v3d_priv,
        if (ret)
                return ret;

+       drm_sched_job_arm(&job->base);
+
        job->done_fence = dma_fence_get(&job->base.s_fence->finished);

        /* put by scheduler job completion */

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);

--

2.32.0.rc2