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.pr...@arm.com>
Signed-off-by: Daniel Vetter <daniel.vet...@intel.com>
Cc: Lucas Stach <l.st...@pengutronix.de>
Cc: Russell King <linux+etna...@armlinux.org.uk>
Cc: Christian Gmeiner <christian.gmei...@gmail.com>
Cc: Qiang Yu <yuq...@gmail.com>
Cc: Rob Herring <r...@kernel.org>
Cc: Tomeu Vizoso <tomeu.viz...@collabora.com>
Cc: Steven Price <steven.pr...@arm.com>
Cc: Alyssa Rosenzweig <alyssa.rosenzw...@collabora.com>
Cc: David Airlie <airl...@linux.ie>
Cc: Daniel Vetter <dan...@ffwll.ch>
Cc: Sumit Semwal <sumit.sem...@linaro.org>
Cc: "Christian König" <christian.koe...@amd.com>
Cc: Masahiro Yamada <masahi...@kernel.org>
Cc: Kees Cook <keesc...@chromium.org>
Cc: Adam Borowski <kilob...@angband.pl>
Cc: Nick Terrell <terre...@fb.com>
Cc: Mauro Carvalho Chehab <mchehab+hua...@kernel.org>
Cc: Paul Menzel <pmen...@molgen.mpg.de>
Cc: Sami Tolvanen <samitolva...@google.com>
Cc: Viresh Kumar <viresh.ku...@linaro.org>
Cc: Alex Deucher <alexander.deuc...@amd.com>
Cc: Dave Airlie <airl...@redhat.com>
Cc: Nirmoy Das <nirmoy....@amd.com>
Cc: Deepak R Varma <mh12gx2...@gmail.com>
Cc: Lee Jones <lee.jo...@linaro.org>
Cc: Kevin Wang <kevin1.w...@amd.com>
Cc: Chen Li <che...@uniontech.com>
Cc: Luben Tuikov <luben.tui...@amd.com>
Cc: "Marek Olšák" <marek.ol...@amd.com>
Cc: Dennis Li <dennis...@amd.com>
Cc: Maarten Lankhorst <maarten.lankho...@linux.intel.com>
Cc: Andrey Grodzovsky <andrey.grodzov...@amd.com>
Cc: Sonny Jiang <sonny.ji...@amd.com>
Cc: Boris Brezillon <boris.brezil...@collabora.com>
Cc: Tian Tao <tiant...@hisilicon.com>
Cc: Jack Zhang <jack.zha...@amd.com>
Cc: etna...@lists.freedesktop.org
Cc: l...@lists.freedesktop.org
Cc: linux-me...@vger.kernel.org
Cc: linaro-mm-...@lists.linaro.org
Cc: Emma Anholt <e...@anholt.net>
---
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;
+}
+
+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/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
