[PATCH 01/13] drm/scheduler: fix fence ref counting

[PATCH 01/13] drm/scheduler: fix fence ref counting

[Christian König]

We leaked dependency fences when processes were beeing killed.

Additional to that grab a reference to the last scheduled fence.

Signed-off-by: Christian König <christian.koenig@amd.com>
---
 drivers/gpu/drm/scheduler/sched_entity.c | 6 +++++-
 1 file changed, 5 insertions(+), 1 deletion(-)

diff --git a/drivers/gpu/drm/scheduler/sched_entity.c b/drivers/gpu/drm/scheduler/sched_entity.c
index 191c56064f19..1bb1437a8fed 100644
--- a/drivers/gpu/drm/scheduler/sched_entity.c
+++ b/drivers/gpu/drm/scheduler/sched_entity.c
@@ -207,6 +207,7 @@ static void drm_sched_entity_kill_jobs_cb(struct dma_fence *f,
 	struct drm_sched_job *job = container_of(cb, struct drm_sched_job,
 						 finish_cb);
 
+	dma_fence_put(f);
 	init_irq_work(&job->work, drm_sched_entity_kill_jobs_irq_work);
 	irq_work_queue(&job->work);
 }
@@ -234,8 +235,10 @@ static void drm_sched_entity_kill_jobs(struct drm_sched_entity *entity)
 		struct drm_sched_fence *s_fence = job->s_fence;
 
 		/* Wait for all dependencies to avoid data corruptions */
-		while ((f = drm_sched_job_dependency(job, entity)))
+		while ((f = drm_sched_job_dependency(job, entity))) {
 			dma_fence_wait(f, false);
+			dma_fence_put(f);
+		}
 
 		drm_sched_fence_scheduled(s_fence);
 		dma_fence_set_error(&s_fence->finished, -ESRCH);
@@ -250,6 +253,7 @@ static void drm_sched_entity_kill_jobs(struct drm_sched_entity *entity)
 			continue;
 		}
 
+		dma_fence_get(entity->last_scheduled);
 		r = dma_fence_add_callback(entity->last_scheduled,
 					   &job->finish_cb,
 					   drm_sched_entity_kill_jobs_cb);
-- 
2.25.1

[PATCH 02/13] drm/scheduler: add drm_sched_job_add_resv_dependencies

[Christian König]

Add a new function to update job dependencies from a resv obj.

Signed-off-by: Christian König <christian.koenig@amd.com>
---
 drivers/gpu/drm/scheduler/sched_main.c | 49 ++++++++++++++++++--------
 include/drm/gpu_scheduler.h            |  5 +++
 2 files changed, 39 insertions(+), 15 deletions(-)

diff --git a/drivers/gpu/drm/scheduler/sched_main.c b/drivers/gpu/drm/scheduler/sched_main.c
index e0ab14e0fb6b..6e2cd0f906b2 100644
--- a/drivers/gpu/drm/scheduler/sched_main.c
+++ b/drivers/gpu/drm/scheduler/sched_main.c
@@ -685,32 +685,28 @@ int drm_sched_job_add_dependency(struct drm_sched_job *job,
 EXPORT_SYMBOL(drm_sched_job_add_dependency);
 
 /**
- * drm_sched_job_add_implicit_dependencies - adds implicit dependencies as job
- *   dependencies
+ * drm_sched_job_add_resv_dependencies - add all fences from the resv to the job
  * @job: scheduler job to add the dependencies to
- * @obj: the gem object to add new dependencies from.
- * @write: whether the job might write the object (so we need to depend on
- * shared fences in the reservation object).
+ * @resv: the dma_resv object to get the fences from
+ * @usage: the dma_resv_usage to use to filter the fences
  *
- * This should be called after drm_gem_lock_reservations() on your array of
- * GEM objects used in the job but before updating the reservations with your
- * own fences.
+ * This adds all fences matching the given usage from @resv to @job.
+ * Must be called with the @resv lock held.
  *
  * Returns:
  * 0 on success, or an error on failing to expand the array.
  */
-int drm_sched_job_add_implicit_dependencies(struct drm_sched_job *job,
-					    struct drm_gem_object *obj,
-					    bool write)
+int drm_sched_job_add_resv_dependencies(struct drm_sched_job *job,
+					struct dma_resv *resv,
+					enum dma_resv_usage usage)
 {
 	struct dma_resv_iter cursor;
 	struct dma_fence *fence;
 	int ret;
 
-	dma_resv_assert_held(obj->resv);
+	dma_resv_assert_held(resv);
 
-	dma_resv_for_each_fence(&cursor, obj->resv, dma_resv_usage_rw(write),
-				fence) {
+	dma_resv_for_each_fence(&cursor, resv, usage, fence) {
 		/* Make sure to grab an additional ref on the added fence */
 		dma_fence_get(fence);
 		ret = drm_sched_job_add_dependency(job, fence);
@@ -721,8 +717,31 @@ int drm_sched_job_add_implicit_dependencies(struct drm_sched_job *job,
 	}
 	return 0;
 }
-EXPORT_SYMBOL(drm_sched_job_add_implicit_dependencies);
+EXPORT_SYMBOL(drm_sched_job_add_resv_dependencies);
 
+/**
+ * drm_sched_job_add_implicit_dependencies - adds implicit dependencies as job
+ *   dependencies
+ * @job: scheduler job to add the dependencies to
+ * @obj: the gem object to add new dependencies from.
+ * @write: whether the job might write the object (so we need to depend on
+ * shared fences in the reservation object).
+ *
+ * This should be called after drm_gem_lock_reservations() on your array of
+ * GEM objects used in the job but before updating the reservations with your
+ * own fences.
+ *
+ * Returns:
+ * 0 on success, or an error on failing to expand the array.
+ */
+int drm_sched_job_add_implicit_dependencies(struct drm_sched_job *job,
+					    struct drm_gem_object *obj,
+					    bool write)
+{
+	return drm_sched_job_add_resv_dependencies(job, obj->resv,
+						   dma_resv_usage_rw(write));
+}
+EXPORT_SYMBOL(drm_sched_job_add_implicit_dependencies);
 
 /**
  * drm_sched_job_cleanup - clean up scheduler job resources
diff --git a/include/drm/gpu_scheduler.h b/include/drm/gpu_scheduler.h
index 0fca8f38bee4..3315e5be7791 100644
--- a/include/drm/gpu_scheduler.h
+++ b/include/drm/gpu_scheduler.h
@@ -32,6 +32,8 @@
 
 #define MAX_WAIT_SCHED_ENTITY_Q_EMPTY msecs_to_jiffies(1000)
 
+enum dma_resv_usage;
+struct dma_resv;
 struct drm_gem_object;
 
 struct drm_gpu_scheduler;
@@ -474,6 +476,9 @@ int drm_sched_job_init(struct drm_sched_job *job,
 void drm_sched_job_arm(struct drm_sched_job *job);
 int drm_sched_job_add_dependency(struct drm_sched_job *job,
 				 struct dma_fence *fence);
+int drm_sched_job_add_resv_dependencies(struct drm_sched_job *job,
+					struct dma_resv *resv,
+					enum dma_resv_usage usage);
 int drm_sched_job_add_implicit_dependencies(struct drm_sched_job *job,
 					    struct drm_gem_object *obj,
 					    bool write);
-- 
2.25.1

RE: [PATCH 02/13] drm/scheduler: add drm_sched_job_add_resv_dependencies

[Chien, WenChieh (Jay)]

[AMD Official Use Only - General]

Hi Christian

This looks on kernel revision 5.15, currently, the Zork use 5.4 
Google also comment that kernel 5.15 fix the issue. 

I'm not sure the kernel  have rev plan to 5.15 or not
We will discuss this on 10/3. 

Do you suggest that use kernel 5.15 and merge patch to test  ?

Jay



-----Original Message-----
From: Christian König <ckoenig.leichtzumerken@gmail.com> 
Sent: Thursday, September 29, 2022 9:21 PM
To: dri-devel@lists.freedesktop.org
Cc: Grodzovsky, Andrey <Andrey.Grodzovsky@amd.com>; Chien, WenChieh (Jay) <WenChieh.Chien@amd.com>; Wang, Chester <shansheng.wang@amd.com>; Tuikov, Luben <Luben.Tuikov@amd.com>; Koenig, Christian <Christian.Koenig@amd.com>
Subject: [PATCH 02/13] drm/scheduler: add drm_sched_job_add_resv_dependencies

Add a new function to update job dependencies from a resv obj.

Signed-off-by: Christian König <christian.koenig@amd.com>
---
 drivers/gpu/drm/scheduler/sched_main.c | 49 ++++++++++++++++++--------
 include/drm/gpu_scheduler.h            |  5 +++
 2 files changed, 39 insertions(+), 15 deletions(-)

diff --git a/drivers/gpu/drm/scheduler/sched_main.c b/drivers/gpu/drm/scheduler/sched_main.c
index e0ab14e0fb6b..6e2cd0f906b2 100644
--- a/drivers/gpu/drm/scheduler/sched_main.c
+++ b/drivers/gpu/drm/scheduler/sched_main.c
@@ -685,32 +685,28 @@ int drm_sched_job_add_dependency(struct drm_sched_job *job,  EXPORT_SYMBOL(drm_sched_job_add_dependency);
 
 /**
- * drm_sched_job_add_implicit_dependencies - adds implicit dependencies as job
- *   dependencies
+ * drm_sched_job_add_resv_dependencies - add all fences from the resv 
+ to the job
  * @job: scheduler job to add the dependencies to
- * @obj: the gem object to add new dependencies from.
- * @write: whether the job might write the object (so we need to depend on
- * shared fences in the reservation object).
+ * @resv: the dma_resv object to get the fences from
+ * @usage: the dma_resv_usage to use to filter the fences
  *
- * This should be called after drm_gem_lock_reservations() on your array of
- * GEM objects used in the job but before updating the reservations with your
- * own fences.
+ * This adds all fences matching the given usage from @resv to @job.
+ * Must be called with the @resv lock held.
  *
  * Returns:
  * 0 on success, or an error on failing to expand the array.
  */
-int drm_sched_job_add_implicit_dependencies(struct drm_sched_job *job,
-					    struct drm_gem_object *obj,
-					    bool write)
+int drm_sched_job_add_resv_dependencies(struct drm_sched_job *job,
+					struct dma_resv *resv,
+					enum dma_resv_usage usage)
 {
 	struct dma_resv_iter cursor;
 	struct dma_fence *fence;
 	int ret;
 
-	dma_resv_assert_held(obj->resv);
+	dma_resv_assert_held(resv);
 
-	dma_resv_for_each_fence(&cursor, obj->resv, dma_resv_usage_rw(write),
-				fence) {
+	dma_resv_for_each_fence(&cursor, resv, usage, fence) {
 		/* Make sure to grab an additional ref on the added fence */
 		dma_fence_get(fence);
 		ret = drm_sched_job_add_dependency(job, fence); @@ -721,8 +717,31 @@ int drm_sched_job_add_implicit_dependencies(struct drm_sched_job *job,
 	}
 	return 0;
 }
-EXPORT_SYMBOL(drm_sched_job_add_implicit_dependencies);
+EXPORT_SYMBOL(drm_sched_job_add_resv_dependencies);
 
+/**
+ * drm_sched_job_add_implicit_dependencies - adds implicit dependencies as job
+ *   dependencies
+ * @job: scheduler job to add the dependencies to
+ * @obj: the gem object to add new dependencies from.
+ * @write: whether the job might write the object (so we need to depend 
+on
+ * shared fences in the reservation object).
+ *
+ * This should be called after drm_gem_lock_reservations() on your 
+array of
+ * GEM objects used in the job but before updating the reservations 
+with your
+ * own fences.
+ *
+ * Returns:
+ * 0 on success, or an error on failing to expand the array.
+ */
+int drm_sched_job_add_implicit_dependencies(struct drm_sched_job *job,
+					    struct drm_gem_object *obj,
+					    bool write)
+{
+	return drm_sched_job_add_resv_dependencies(job, obj->resv,
+						   dma_resv_usage_rw(write));
+}
+EXPORT_SYMBOL(drm_sched_job_add_implicit_dependencies);
 
 /**
  * drm_sched_job_cleanup - clean up scheduler job resources diff --git a/include/drm/gpu_scheduler.h b/include/drm/gpu_scheduler.h index 0fca8f38bee4..3315e5be7791 100644
--- a/include/drm/gpu_scheduler.h
+++ b/include/drm/gpu_scheduler.h
@@ -32,6 +32,8 @@
 
 #define MAX_WAIT_SCHED_ENTITY_Q_EMPTY msecs_to_jiffies(1000)
 
+enum dma_resv_usage;
+struct dma_resv;
 struct drm_gem_object;
 
 struct drm_gpu_scheduler;
@@ -474,6 +476,9 @@ int drm_sched_job_init(struct drm_sched_job *job,  void drm_sched_job_arm(struct drm_sched_job *job);  int drm_sched_job_add_dependency(struct drm_sched_job *job,
 				 struct dma_fence *fence);
+int drm_sched_job_add_resv_dependencies(struct drm_sched_job *job,
+					struct dma_resv *resv,
+					enum dma_resv_usage usage);
 int drm_sched_job_add_implicit_dependencies(struct drm_sched_job *job,
 					    struct drm_gem_object *obj,
 					    bool write);
--
2.25.1

Re: [PATCH 02/13] drm/scheduler: add drm_sched_job_add_resv_dependencies

[Christian König]

Well this won't be fixed on older kernel like 5.4 or 5.15.

You at least need something like 5.19 and even then you need to look 
into backporting that stuff.

Regards,
Christian.

Am 30.09.22 um 04:05 schrieb Chien, WenChieh (Jay):
> [AMD Official Use Only - General]
>
> Hi Christian
>
> This looks on kernel revision 5.15, currently, the Zork use 5.4
> Google also comment that kernel 5.15 fix the issue.
>
> I'm not sure the kernel  have rev plan to 5.15 or not
> We will discuss this on 10/3.
>
> Do you suggest that use kernel 5.15 and merge patch to test  ?
>
> Jay
>
>
>
> -----Original Message-----
> From: Christian König <ckoenig.leichtzumerken@gmail.com>
> Sent: Thursday, September 29, 2022 9:21 PM
> To: dri-devel@lists.freedesktop.org
> Cc: Grodzovsky, Andrey <Andrey.Grodzovsky@amd.com>; Chien, WenChieh (Jay) <WenChieh.Chien@amd.com>; Wang, Chester <shansheng.wang@amd.com>; Tuikov, Luben <Luben.Tuikov@amd.com>; Koenig, Christian <Christian.Koenig@amd.com>
> Subject: [PATCH 02/13] drm/scheduler: add drm_sched_job_add_resv_dependencies
>
> Add a new function to update job dependencies from a resv obj.
>
> Signed-off-by: Christian König <christian.koenig@amd.com>
> ---
>   drivers/gpu/drm/scheduler/sched_main.c | 49 ++++++++++++++++++--------
>   include/drm/gpu_scheduler.h            |  5 +++
>   2 files changed, 39 insertions(+), 15 deletions(-)
>
> diff --git a/drivers/gpu/drm/scheduler/sched_main.c b/drivers/gpu/drm/scheduler/sched_main.c
> index e0ab14e0fb6b..6e2cd0f906b2 100644
> --- a/drivers/gpu/drm/scheduler/sched_main.c
> +++ b/drivers/gpu/drm/scheduler/sched_main.c
> @@ -685,32 +685,28 @@ int drm_sched_job_add_dependency(struct drm_sched_job *job,  EXPORT_SYMBOL(drm_sched_job_add_dependency);
>   
>   /**
> - * drm_sched_job_add_implicit_dependencies - adds implicit dependencies as job
> - *   dependencies
> + * drm_sched_job_add_resv_dependencies - add all fences from the resv
> + to the job
>    * @job: scheduler job to add the dependencies to
> - * @obj: the gem object to add new dependencies from.
> - * @write: whether the job might write the object (so we need to depend on
> - * shared fences in the reservation object).
> + * @resv: the dma_resv object to get the fences from
> + * @usage: the dma_resv_usage to use to filter the fences
>    *
> - * This should be called after drm_gem_lock_reservations() on your array of
> - * GEM objects used in the job but before updating the reservations with your
> - * own fences.
> + * This adds all fences matching the given usage from @resv to @job.
> + * Must be called with the @resv lock held.
>    *
>    * Returns:
>    * 0 on success, or an error on failing to expand the array.
>    */
> -int drm_sched_job_add_implicit_dependencies(struct drm_sched_job *job,
> -					    struct drm_gem_object *obj,
> -					    bool write)
> +int drm_sched_job_add_resv_dependencies(struct drm_sched_job *job,
> +					struct dma_resv *resv,
> +					enum dma_resv_usage usage)
>   {
>   	struct dma_resv_iter cursor;
>   	struct dma_fence *fence;
>   	int ret;
>   
> -	dma_resv_assert_held(obj->resv);
> +	dma_resv_assert_held(resv);
>   
> -	dma_resv_for_each_fence(&cursor, obj->resv, dma_resv_usage_rw(write),
> -				fence) {
> +	dma_resv_for_each_fence(&cursor, resv, usage, fence) {
>   		/* Make sure to grab an additional ref on the added fence */
>   		dma_fence_get(fence);
>   		ret = drm_sched_job_add_dependency(job, fence); @@ -721,8 +717,31 @@ int drm_sched_job_add_implicit_dependencies(struct drm_sched_job *job,
>   	}
>   	return 0;
>   }
> -EXPORT_SYMBOL(drm_sched_job_add_implicit_dependencies);
> +EXPORT_SYMBOL(drm_sched_job_add_resv_dependencies);
>   
> +/**
> + * drm_sched_job_add_implicit_dependencies - adds implicit dependencies as job
> + *   dependencies
> + * @job: scheduler job to add the dependencies to
> + * @obj: the gem object to add new dependencies from.
> + * @write: whether the job might write the object (so we need to depend
> +on
> + * shared fences in the reservation object).
> + *
> + * This should be called after drm_gem_lock_reservations() on your
> +array of
> + * GEM objects used in the job but before updating the reservations
> +with your
> + * own fences.
> + *
> + * Returns:
> + * 0 on success, or an error on failing to expand the array.
> + */
> +int drm_sched_job_add_implicit_dependencies(struct drm_sched_job *job,
> +					    struct drm_gem_object *obj,
> +					    bool write)
> +{
> +	return drm_sched_job_add_resv_dependencies(job, obj->resv,
> +						   dma_resv_usage_rw(write));
> +}
> +EXPORT_SYMBOL(drm_sched_job_add_implicit_dependencies);
>   
>   /**
>    * drm_sched_job_cleanup - clean up scheduler job resources diff --git a/include/drm/gpu_scheduler.h b/include/drm/gpu_scheduler.h index 0fca8f38bee4..3315e5be7791 100644
> --- a/include/drm/gpu_scheduler.h
> +++ b/include/drm/gpu_scheduler.h
> @@ -32,6 +32,8 @@
>   
>   #define MAX_WAIT_SCHED_ENTITY_Q_EMPTY msecs_to_jiffies(1000)
>   
> +enum dma_resv_usage;
> +struct dma_resv;
>   struct drm_gem_object;
>   
>   struct drm_gpu_scheduler;
> @@ -474,6 +476,9 @@ int drm_sched_job_init(struct drm_sched_job *job,  void drm_sched_job_arm(struct drm_sched_job *job);  int drm_sched_job_add_dependency(struct drm_sched_job *job,
>   				 struct dma_fence *fence);
> +int drm_sched_job_add_resv_dependencies(struct drm_sched_job *job,
> +					struct dma_resv *resv,
> +					enum dma_resv_usage usage);
>   int drm_sched_job_add_implicit_dependencies(struct drm_sched_job *job,
>   					    struct drm_gem_object *obj,
>   					    bool write);
> --
> 2.25.1

[PATCH 03/13] drm/amdgpu: use drm_sched_job_add_resv_dependencies for moves

[Christian König]

Use the new common scheduler functions to figure out what to wait for.

Signed-off-by: Christian König <christian.koenig@amd.com>
---
 drivers/gpu/drm/amd/amdgpu/amdgpu_ttm.c | 16 +++++-----------
 1 file changed, 5 insertions(+), 11 deletions(-)

diff --git a/drivers/gpu/drm/amd/amdgpu/amdgpu_ttm.c b/drivers/gpu/drm/amd/amdgpu/amdgpu_ttm.c
index 134575a3893c..4fabb194ef89 100644
--- a/drivers/gpu/drm/amd/amdgpu/amdgpu_ttm.c
+++ b/drivers/gpu/drm/amd/amdgpu/amdgpu_ttm.c
@@ -1977,17 +1977,11 @@ static int amdgpu_ttm_prepare_job(struct amdgpu_device *adev,
 							adev->gart.bo);
 		(*job)->vm_needs_flush = true;
 	}
-	if (resv) {
-		r = amdgpu_sync_resv(adev, &(*job)->sync, resv,
-				     AMDGPU_SYNC_ALWAYS,
-				     AMDGPU_FENCE_OWNER_UNDEFINED);
-		if (r) {
-			DRM_ERROR("sync failed (%d).\n", r);
-			amdgpu_job_free(*job);
-			return r;
-		}
-	}
-	return 0;
+	if (!resv)
+		return 0;
+
+	return drm_sched_job_add_resv_dependencies(&(*job)->base, resv,
+						   DMA_RESV_USAGE_BOOKKEEP);
 }
 
 int amdgpu_copy_buffer(struct amdgpu_ring *ring, uint64_t src_offset,
-- 
2.25.1

[PATCH 04/13] drm/amdgpu: drop the fence argument from amdgpu_vmid_grab

[Christian König]

This is always the job anyway.

Signed-off-by: Christian König <christian.koenig@amd.com>
---
 drivers/gpu/drm/amd/amdgpu/amdgpu_ids.c | 20 ++++++++------------
 drivers/gpu/drm/amd/amdgpu/amdgpu_ids.h |  3 +--
 drivers/gpu/drm/amd/amdgpu/amdgpu_job.c |  4 +---
 3 files changed, 10 insertions(+), 17 deletions(-)

diff --git a/drivers/gpu/drm/amd/amdgpu/amdgpu_ids.c b/drivers/gpu/drm/amd/amdgpu/amdgpu_ids.c
index 03d115d2b5ed..b76294d4275b 100644
--- a/drivers/gpu/drm/amd/amdgpu/amdgpu_ids.c
+++ b/drivers/gpu/drm/amd/amdgpu/amdgpu_ids.c
@@ -244,7 +244,6 @@ static int amdgpu_vmid_grab_idle(struct amdgpu_vm *vm,
  * @vm: vm to allocate id for
  * @ring: ring we want to submit job to
  * @sync: sync object where we add dependencies
- * @fence: fence protecting ID from reuse
  * @job: job who wants to use the VMID
  * @id: resulting VMID
  *
@@ -253,7 +252,6 @@ static int amdgpu_vmid_grab_idle(struct amdgpu_vm *vm,
 static int amdgpu_vmid_grab_reserved(struct amdgpu_vm *vm,
 				     struct amdgpu_ring *ring,
 				     struct amdgpu_sync *sync,
-				     struct dma_fence *fence,
 				     struct amdgpu_job *job,
 				     struct amdgpu_vmid **id)
 {
@@ -290,7 +288,7 @@ static int amdgpu_vmid_grab_reserved(struct amdgpu_vm *vm,
 	/* Good we can use this VMID. Remember this submission as
 	* user of the VMID.
 	*/
-	r = amdgpu_sync_fence(&(*id)->active, fence);
+	r = amdgpu_sync_fence(&(*id)->active, &job->base.s_fence->finished);
 	if (r)
 		return r;
 
@@ -305,7 +303,6 @@ static int amdgpu_vmid_grab_reserved(struct amdgpu_vm *vm,
  * @vm: vm to allocate id for
  * @ring: ring we want to submit job to
  * @sync: sync object where we add dependencies
- * @fence: fence protecting ID from reuse
  * @job: job who wants to use the VMID
  * @id: resulting VMID
  *
@@ -314,7 +311,6 @@ static int amdgpu_vmid_grab_reserved(struct amdgpu_vm *vm,
 static int amdgpu_vmid_grab_used(struct amdgpu_vm *vm,
 				 struct amdgpu_ring *ring,
 				 struct amdgpu_sync *sync,
-				 struct dma_fence *fence,
 				 struct amdgpu_job *job,
 				 struct amdgpu_vmid **id)
 {
@@ -352,7 +348,8 @@ static int amdgpu_vmid_grab_used(struct amdgpu_vm *vm,
 		/* Good, we can use this VMID. Remember this submission as
 		 * user of the VMID.
 		 */
-		r = amdgpu_sync_fence(&(*id)->active, fence);
+		r = amdgpu_sync_fence(&(*id)->active,
+				      &job->base.s_fence->finished);
 		if (r)
 			return r;
 
@@ -371,14 +368,12 @@ static int amdgpu_vmid_grab_used(struct amdgpu_vm *vm,
  * @vm: vm to allocate id for
  * @ring: ring we want to submit job to
  * @sync: sync object where we add dependencies
- * @fence: fence protecting ID from reuse
  * @job: job who wants to use the VMID
  *
  * Allocate an id for the vm, adding fences to the sync obj as necessary.
  */
 int amdgpu_vmid_grab(struct amdgpu_vm *vm, struct amdgpu_ring *ring,
-		     struct amdgpu_sync *sync, struct dma_fence *fence,
-		     struct amdgpu_job *job)
+		     struct amdgpu_sync *sync, struct amdgpu_job *job)
 {
 	struct amdgpu_device *adev = ring->adev;
 	unsigned vmhub = ring->funcs->vmhub;
@@ -393,11 +388,11 @@ int amdgpu_vmid_grab(struct amdgpu_vm *vm, struct amdgpu_ring *ring,
 		goto error;
 
 	if (vm->reserved_vmid[vmhub]) {
-		r = amdgpu_vmid_grab_reserved(vm, ring, sync, fence, job, &id);
+		r = amdgpu_vmid_grab_reserved(vm, ring, sync, job, &id);
 		if (r || !id)
 			goto error;
 	} else {
-		r = amdgpu_vmid_grab_used(vm, ring, sync, fence, job, &id);
+		r = amdgpu_vmid_grab_used(vm, ring, sync, job, &id);
 		if (r)
 			goto error;
 
@@ -406,7 +401,8 @@ int amdgpu_vmid_grab(struct amdgpu_vm *vm, struct amdgpu_ring *ring,
 			id = idle;
 
 			/* Remember this submission as user of the VMID */
-			r = amdgpu_sync_fence(&id->active, fence);
+			r = amdgpu_sync_fence(&id->active,
+					      &job->base.s_fence->finished);
 			if (r)
 				goto error;
 
diff --git a/drivers/gpu/drm/amd/amdgpu/amdgpu_ids.h b/drivers/gpu/drm/amd/amdgpu/amdgpu_ids.h
index 06c8a0034fa5..1b1e7d04655c 100644
--- a/drivers/gpu/drm/amd/amdgpu/amdgpu_ids.h
+++ b/drivers/gpu/drm/amd/amdgpu/amdgpu_ids.h
@@ -84,8 +84,7 @@ void amdgpu_vmid_free_reserved(struct amdgpu_device *adev,
 			       struct amdgpu_vm *vm,
 			       unsigned vmhub);
 int amdgpu_vmid_grab(struct amdgpu_vm *vm, struct amdgpu_ring *ring,
-		     struct amdgpu_sync *sync, struct dma_fence *fence,
-		     struct amdgpu_job *job);
+		     struct amdgpu_sync *sync, struct amdgpu_job *job);
 void amdgpu_vmid_reset(struct amdgpu_device *adev, unsigned vmhub,
 		       unsigned vmid);
 void amdgpu_vmid_reset_all(struct amdgpu_device *adev);
diff --git a/drivers/gpu/drm/amd/amdgpu/amdgpu_job.c b/drivers/gpu/drm/amd/amdgpu/amdgpu_job.c
index 46c99331d7f1..5aa053acc0b4 100644
--- a/drivers/gpu/drm/amd/amdgpu/amdgpu_job.c
+++ b/drivers/gpu/drm/amd/amdgpu/amdgpu_job.c
@@ -256,9 +256,7 @@ static struct dma_fence *amdgpu_job_dependency(struct drm_sched_job *sched_job,
 	}
 
 	while (fence == NULL && vm && !job->vmid) {
-		r = amdgpu_vmid_grab(vm, ring, &job->sync,
-				     &job->base.s_fence->finished,
-				     job);
+		r = amdgpu_vmid_grab(vm, ring, &job->sync, job);
 		if (r)
 			DRM_ERROR("Error getting VM ID (%d)\n", r);
 
-- 
2.25.1

[PATCH 05/13] drm/amdgpu: drop amdgpu_sync from amdgpu_vmid_grab

[Christian König]

Instead return the fence directly. Avoids memory allocation to store the
fence.

Signed-off-by: Christian König <christian.koenig@amd.com>
---
 drivers/gpu/drm/amd/amdgpu/amdgpu_ids.c | 42 +++++++++++++------------
 drivers/gpu/drm/amd/amdgpu/amdgpu_ids.h |  2 +-
 drivers/gpu/drm/amd/amdgpu/amdgpu_job.c | 12 +++----
 3 files changed, 28 insertions(+), 28 deletions(-)

diff --git a/drivers/gpu/drm/amd/amdgpu/amdgpu_ids.c b/drivers/gpu/drm/amd/amdgpu/amdgpu_ids.c
index b76294d4275b..2a9a2593dc18 100644
--- a/drivers/gpu/drm/amd/amdgpu/amdgpu_ids.c
+++ b/drivers/gpu/drm/amd/amdgpu/amdgpu_ids.c
@@ -170,26 +170,27 @@ bool amdgpu_vmid_had_gpu_reset(struct amdgpu_device *adev,
  *
  * @vm: vm to allocate id for
  * @ring: ring we want to submit job to
- * @sync: sync object where we add dependencies
  * @idle: resulting idle VMID
+ * @fence: fence to wait for if no id could be grabbed
  *
  * Try to find an idle VMID, if none is idle add a fence to wait to the sync
  * object. Returns -ENOMEM when we are out of memory.
  */
 static int amdgpu_vmid_grab_idle(struct amdgpu_vm *vm,
 				 struct amdgpu_ring *ring,
-				 struct amdgpu_sync *sync,
-				 struct amdgpu_vmid **idle)
+				 struct amdgpu_vmid **idle,
+				 struct dma_fence **fence)
 {
 	struct amdgpu_device *adev = ring->adev;
 	unsigned vmhub = ring->funcs->vmhub;
 	struct amdgpu_vmid_mgr *id_mgr = &adev->vm_manager.id_mgr[vmhub];
 	struct dma_fence **fences;
 	unsigned i;
-	int r;
 
-	if (!dma_fence_is_signaled(ring->vmid_wait))
-		return amdgpu_sync_fence(sync, ring->vmid_wait);
+	if (!dma_fence_is_signaled(ring->vmid_wait)) {
+		*fence = dma_fence_get(ring->vmid_wait);
+		return 0;
+	}
 
 	fences = kmalloc_array(id_mgr->num_ids, sizeof(void *), GFP_KERNEL);
 	if (!fences)
@@ -228,10 +229,10 @@ static int amdgpu_vmid_grab_idle(struct amdgpu_vm *vm,
 			return -ENOMEM;
 		}
 
-		r = amdgpu_sync_fence(sync, &array->base);
+		*fence = dma_fence_get(&array->base);
 		dma_fence_put(ring->vmid_wait);
 		ring->vmid_wait = &array->base;
-		return r;
+		return 0;
 	}
 	kfree(fences);
 
@@ -243,17 +244,17 @@ static int amdgpu_vmid_grab_idle(struct amdgpu_vm *vm,
  *
  * @vm: vm to allocate id for
  * @ring: ring we want to submit job to
- * @sync: sync object where we add dependencies
  * @job: job who wants to use the VMID
  * @id: resulting VMID
+ * @fence: fence to wait for if no id could be grabbed
  *
  * Try to assign a reserved VMID.
  */
 static int amdgpu_vmid_grab_reserved(struct amdgpu_vm *vm,
 				     struct amdgpu_ring *ring,
-				     struct amdgpu_sync *sync,
 				     struct amdgpu_job *job,
-				     struct amdgpu_vmid **id)
+				     struct amdgpu_vmid **id,
+				     struct dma_fence **fence)
 {
 	struct amdgpu_device *adev = ring->adev;
 	unsigned vmhub = ring->funcs->vmhub;
@@ -280,7 +281,8 @@ static int amdgpu_vmid_grab_reserved(struct amdgpu_vm *vm,
 		tmp = amdgpu_sync_peek_fence(&(*id)->active, ring);
 		if (tmp) {
 			*id = NULL;
-			return amdgpu_sync_fence(sync, tmp);
+			*fence = dma_fence_get(tmp);
+			return 0;
 		}
 		needs_flush = true;
 	}
@@ -302,17 +304,17 @@ static int amdgpu_vmid_grab_reserved(struct amdgpu_vm *vm,
  *
  * @vm: vm to allocate id for
  * @ring: ring we want to submit job to
- * @sync: sync object where we add dependencies
  * @job: job who wants to use the VMID
  * @id: resulting VMID
+ * @fence: fence to wait for if no id could be grabbed
  *
  * Try to reuse a VMID for this submission.
  */
 static int amdgpu_vmid_grab_used(struct amdgpu_vm *vm,
 				 struct amdgpu_ring *ring,
-				 struct amdgpu_sync *sync,
 				 struct amdgpu_job *job,
-				 struct amdgpu_vmid **id)
+				 struct amdgpu_vmid **id,
+				 struct dma_fence **fence)
 {
 	struct amdgpu_device *adev = ring->adev;
 	unsigned vmhub = ring->funcs->vmhub;
@@ -367,13 +369,13 @@ static int amdgpu_vmid_grab_used(struct amdgpu_vm *vm,
  *
  * @vm: vm to allocate id for
  * @ring: ring we want to submit job to
- * @sync: sync object where we add dependencies
  * @job: job who wants to use the VMID
+ * @fence: fence to wait for if no id could be grabbed
  *
  * Allocate an id for the vm, adding fences to the sync obj as necessary.
  */
 int amdgpu_vmid_grab(struct amdgpu_vm *vm, struct amdgpu_ring *ring,
-		     struct amdgpu_sync *sync, struct amdgpu_job *job)
+		     struct amdgpu_job *job, struct dma_fence **fence)
 {
 	struct amdgpu_device *adev = ring->adev;
 	unsigned vmhub = ring->funcs->vmhub;
@@ -383,16 +385,16 @@ int amdgpu_vmid_grab(struct amdgpu_vm *vm, struct amdgpu_ring *ring,
 	int r = 0;
 
 	mutex_lock(&id_mgr->lock);
-	r = amdgpu_vmid_grab_idle(vm, ring, sync, &idle);
+	r = amdgpu_vmid_grab_idle(vm, ring, &idle, fence);
 	if (r || !idle)
 		goto error;
 
 	if (vm->reserved_vmid[vmhub]) {
-		r = amdgpu_vmid_grab_reserved(vm, ring, sync, job, &id);
+		r = amdgpu_vmid_grab_reserved(vm, ring, job, &id, fence);
 		if (r || !id)
 			goto error;
 	} else {
-		r = amdgpu_vmid_grab_used(vm, ring, sync, job, &id);
+		r = amdgpu_vmid_grab_used(vm, ring, job, &id, fence);
 		if (r)
 			goto error;
 
diff --git a/drivers/gpu/drm/amd/amdgpu/amdgpu_ids.h b/drivers/gpu/drm/amd/amdgpu/amdgpu_ids.h
index 1b1e7d04655c..57efe61dceed 100644
--- a/drivers/gpu/drm/amd/amdgpu/amdgpu_ids.h
+++ b/drivers/gpu/drm/amd/amdgpu/amdgpu_ids.h
@@ -84,7 +84,7 @@ void amdgpu_vmid_free_reserved(struct amdgpu_device *adev,
 			       struct amdgpu_vm *vm,
 			       unsigned vmhub);
 int amdgpu_vmid_grab(struct amdgpu_vm *vm, struct amdgpu_ring *ring,
-		     struct amdgpu_sync *sync, struct amdgpu_job *job);
+		     struct amdgpu_job *job, struct dma_fence **fence);
 void amdgpu_vmid_reset(struct amdgpu_device *adev, unsigned vmhub,
 		       unsigned vmid);
 void amdgpu_vmid_reset_all(struct amdgpu_device *adev);
diff --git a/drivers/gpu/drm/amd/amdgpu/amdgpu_job.c b/drivers/gpu/drm/amd/amdgpu/amdgpu_job.c
index 5aa053acc0b4..8c2001ddab39 100644
--- a/drivers/gpu/drm/amd/amdgpu/amdgpu_job.c
+++ b/drivers/gpu/drm/amd/amdgpu/amdgpu_job.c
@@ -239,12 +239,12 @@ int amdgpu_job_submit_direct(struct amdgpu_job *job, struct amdgpu_ring *ring,
 	return 0;
 }
 
-static struct dma_fence *amdgpu_job_dependency(struct drm_sched_job *sched_job,
-					       struct drm_sched_entity *s_entity)
+static struct dma_fence *
+amdgpu_job_dependency(struct drm_sched_job *sched_job,
+		      struct drm_sched_entity *s_entity)
 {
 	struct amdgpu_ring *ring = to_amdgpu_ring(s_entity->rq->sched);
 	struct amdgpu_job *job = to_amdgpu_job(sched_job);
-	struct amdgpu_vm *vm = job->vm;
 	struct dma_fence *fence;
 	int r;
 
@@ -255,12 +255,10 @@ static struct dma_fence *amdgpu_job_dependency(struct drm_sched_job *sched_job,
 			DRM_ERROR("Error adding fence (%d)\n", r);
 	}
 
-	while (fence == NULL && vm && !job->vmid) {
-		r = amdgpu_vmid_grab(vm, ring, &job->sync, job);
+	while (fence == NULL && job->vm && !job->vmid) {
+		r = amdgpu_vmid_grab(job->vm, ring, job, &fence);
 		if (r)
 			DRM_ERROR("Error getting VM ID (%d)\n", r);
-
-		fence = amdgpu_sync_get_fence(&job->sync);
 	}
 
 	if (!fence && job->gang_submit)
-- 
2.25.1

[PATCH 06/13] drm/amdgpu: cleanup scheduler job initialization

[Christian König]

Init the DRM scheduler base class while allocating the job.

This makes the whole handling much more cleaner.

Signed-off-by: Christian König <christian.koenig@amd.com>
---
 drivers/gpu/drm/amd/amdgpu/amdgpu_amdkfd.c  |  2 +-
 drivers/gpu/drm/amd/amdgpu/amdgpu_cs.c      |  8 +--
 drivers/gpu/drm/amd/amdgpu/amdgpu_job.c     | 44 ++++++++-------
 drivers/gpu/drm/amd/amdgpu/amdgpu_job.h     | 14 +++--
 drivers/gpu/drm/amd/amdgpu/amdgpu_jpeg.c    |  7 ++-
 drivers/gpu/drm/amd/amdgpu/amdgpu_ttm.c     | 56 +++++++------------
 drivers/gpu/drm/amd/amdgpu/amdgpu_uvd.c     |  9 ++-
 drivers/gpu/drm/amd/amdgpu/amdgpu_vce.c     | 13 +++--
 drivers/gpu/drm/amd/amdgpu/amdgpu_vcn.c     | 22 +++++---
 drivers/gpu/drm/amd/amdgpu/amdgpu_vm_sdma.c | 61 +++++++++++----------
 drivers/gpu/drm/amd/amdgpu/gmc_v10_0.c      | 12 ++--
 drivers/gpu/drm/amd/amdgpu/uvd_v6_0.c       |  8 +--
 drivers/gpu/drm/amd/amdgpu/uvd_v7_0.c       | 14 +++--
 drivers/gpu/drm/amd/amdkfd/kfd_migrate.c    | 17 ++----
 14 files changed, 137 insertions(+), 150 deletions(-)

diff --git a/drivers/gpu/drm/amd/amdgpu/amdgpu_amdkfd.c b/drivers/gpu/drm/amd/amdgpu/amdgpu_amdkfd.c
index c7b1a2dfde13..2a0a670f1fae 100644
--- a/drivers/gpu/drm/amd/amdgpu/amdgpu_amdkfd.c
+++ b/drivers/gpu/drm/amd/amdgpu/amdgpu_amdkfd.c
@@ -674,7 +674,7 @@ int amdgpu_amdkfd_submit_ib(struct amdgpu_device *adev,
 		goto err;
 	}
 
-	ret = amdgpu_job_alloc(adev, 1, &job, NULL);
+	ret = amdgpu_job_alloc(adev, NULL, NULL, NULL, 1, &job);
 	if (ret)
 		goto err;
 
diff --git a/drivers/gpu/drm/amd/amdgpu/amdgpu_cs.c b/drivers/gpu/drm/amd/amdgpu/amdgpu_cs.c
index 1bbd39b3b0fc..aa6f6c428dbc 100644
--- a/drivers/gpu/drm/amd/amdgpu/amdgpu_cs.c
+++ b/drivers/gpu/drm/amd/amdgpu/amdgpu_cs.c
@@ -291,12 +291,8 @@ static int amdgpu_cs_pass1(struct amdgpu_cs_parser *p,
 		return -EINVAL;
 
 	for (i = 0; i < p->gang_size; ++i) {
-		ret = amdgpu_job_alloc(p->adev, num_ibs[i], &p->jobs[i], vm);
-		if (ret)
-			goto free_all_kdata;
-
-		ret = drm_sched_job_init(&p->jobs[i]->base, p->entities[i],
-					 &fpriv->vm);
+		ret = amdgpu_job_alloc(p->adev, vm, p->entities[i], vm,
+				       num_ibs[i], &p->jobs[i]);
 		if (ret)
 			goto free_all_kdata;
 	}
diff --git a/drivers/gpu/drm/amd/amdgpu/amdgpu_job.c b/drivers/gpu/drm/amd/amdgpu/amdgpu_job.c
index 8c2001ddab39..26e5584e7eea 100644
--- a/drivers/gpu/drm/amd/amdgpu/amdgpu_job.c
+++ b/drivers/gpu/drm/amd/amdgpu/amdgpu_job.c
@@ -89,8 +89,9 @@ static enum drm_gpu_sched_stat amdgpu_job_timedout(struct drm_sched_job *s_job)
 	return DRM_GPU_SCHED_STAT_NOMINAL;
 }
 
-int amdgpu_job_alloc(struct amdgpu_device *adev, unsigned num_ibs,
-		     struct amdgpu_job **job, struct amdgpu_vm *vm)
+int amdgpu_job_alloc(struct amdgpu_device *adev, struct amdgpu_vm *vm,
+		     struct drm_sched_entity *entity, void *owner,
+		     unsigned num_ibs, struct amdgpu_job **job)
 {
 	if (num_ibs == 0)
 		return -EINVAL;
@@ -111,23 +112,30 @@ int amdgpu_job_alloc(struct amdgpu_device *adev, unsigned num_ibs,
 	(*job)->vram_lost_counter = atomic_read(&adev->vram_lost_counter);
 	(*job)->vm_pd_addr = AMDGPU_BO_INVALID_OFFSET;
 
-	return 0;
+	if (!entity)
+		return 0;
+
+	return drm_sched_job_init(&(*job)->base, entity, owner);
 }
 
-int amdgpu_job_alloc_with_ib(struct amdgpu_device *adev, unsigned size,
-		enum amdgpu_ib_pool_type pool_type,
-		struct amdgpu_job **job)
+int amdgpu_job_alloc_with_ib(struct amdgpu_device *adev,
+			     struct drm_sched_entity *entity, void *owner,
+			     unsigned size, enum amdgpu_ib_pool_type pool_type,
+			     struct amdgpu_job **job)
 {
 	int r;
 
-	r = amdgpu_job_alloc(adev, 1, job, NULL);
+	r = amdgpu_job_alloc(adev, NULL, entity, owner, 1, job);
 	if (r)
 		return r;
 
 	(*job)->num_ibs = 1;
 	r = amdgpu_ib_get(adev, NULL, size, pool_type, &(*job)->ibs[0]);
-	if (r)
+	if (r) {
+		if (entity)
+			drm_sched_job_cleanup(&(*job)->base);
 		kfree(*job);
+	}
 
 	return r;
 }
@@ -191,6 +199,9 @@ void amdgpu_job_set_gang_leader(struct amdgpu_job *job,
 
 void amdgpu_job_free(struct amdgpu_job *job)
 {
+	if (job->base.entity)
+		drm_sched_job_cleanup(&job->base);
+
 	amdgpu_job_free_resources(job);
 	amdgpu_sync_free(&job->sync);
 	amdgpu_sync_free(&job->sched_sync);
@@ -203,25 +214,16 @@ void amdgpu_job_free(struct amdgpu_job *job)
 		dma_fence_put(&job->hw_fence);
 }
 
-int amdgpu_job_submit(struct amdgpu_job *job, struct drm_sched_entity *entity,
-		      void *owner, struct dma_fence **f)
+struct dma_fence *amdgpu_job_submit(struct amdgpu_job *job)
 {
-	int r;
-
-	if (!f)
-		return -EINVAL;
-
-	r = drm_sched_job_init(&job->base, entity, owner);
-	if (r)
-		return r;
+	struct dma_fence *f;
 
 	drm_sched_job_arm(&job->base);
-
-	*f = dma_fence_get(&job->base.s_fence->finished);
+	f = dma_fence_get(&job->base.s_fence->finished);
 	amdgpu_job_free_resources(job);
 	drm_sched_entity_push_job(&job->base);
 
-	return 0;
+	return f;
 }
 
 int amdgpu_job_submit_direct(struct amdgpu_job *job, struct amdgpu_ring *ring,
diff --git a/drivers/gpu/drm/amd/amdgpu/amdgpu_job.h b/drivers/gpu/drm/amd/amdgpu/amdgpu_job.h
index ab7b150e5d50..f099210c386a 100644
--- a/drivers/gpu/drm/amd/amdgpu/amdgpu_job.h
+++ b/drivers/gpu/drm/amd/amdgpu/amdgpu_job.h
@@ -78,18 +78,20 @@ static inline struct amdgpu_ring *amdgpu_job_ring(struct amdgpu_job *job)
 	return to_amdgpu_ring(job->base.entity->rq->sched);
 }
 
-int amdgpu_job_alloc(struct amdgpu_device *adev, unsigned num_ibs,
-		     struct amdgpu_job **job, struct amdgpu_vm *vm);
-int amdgpu_job_alloc_with_ib(struct amdgpu_device *adev, unsigned size,
-		enum amdgpu_ib_pool_type pool, struct amdgpu_job **job);
+int amdgpu_job_alloc(struct amdgpu_device *adev, struct amdgpu_vm *vm,
+		     struct drm_sched_entity *entity, void *owner,
+		     unsigned num_ibs, struct amdgpu_job **job);
+int amdgpu_job_alloc_with_ib(struct amdgpu_device *adev,
+			     struct drm_sched_entity *entity, void *owner,
+			     unsigned size, enum amdgpu_ib_pool_type pool_type,
+			     struct amdgpu_job **job);
 void amdgpu_job_set_resources(struct amdgpu_job *job, struct amdgpu_bo *gds,
 			      struct amdgpu_bo *gws, struct amdgpu_bo *oa);
 void amdgpu_job_free_resources(struct amdgpu_job *job);
 void amdgpu_job_set_gang_leader(struct amdgpu_job *job,
 				struct amdgpu_job *leader);
 void amdgpu_job_free(struct amdgpu_job *job);
-int amdgpu_job_submit(struct amdgpu_job *job, struct drm_sched_entity *entity,
-		      void *owner, struct dma_fence **f);
+struct dma_fence *amdgpu_job_submit(struct amdgpu_job *job);
 int amdgpu_job_submit_direct(struct amdgpu_job *job, struct amdgpu_ring *ring,
 			     struct dma_fence **fence);
 
diff --git a/drivers/gpu/drm/amd/amdgpu/amdgpu_jpeg.c b/drivers/gpu/drm/amd/amdgpu/amdgpu_jpeg.c
index 518eb0e40d32..de182bfcf85f 100644
--- a/drivers/gpu/drm/amd/amdgpu/amdgpu_jpeg.c
+++ b/drivers/gpu/drm/amd/amdgpu/amdgpu_jpeg.c
@@ -150,14 +150,15 @@ static int amdgpu_jpeg_dec_set_reg(struct amdgpu_ring *ring, uint32_t handle,
 	const unsigned ib_size_dw = 16;
 	int i, r;
 
-	r = amdgpu_job_alloc_with_ib(ring->adev, ib_size_dw * 4,
-					AMDGPU_IB_POOL_DIRECT, &job);
+	r = amdgpu_job_alloc_with_ib(ring->adev, NULL, NULL, ib_size_dw * 4,
+				     AMDGPU_IB_POOL_DIRECT, &job);
 	if (r)
 		return r;
 
 	ib = &job->ibs[0];
 
-	ib->ptr[0] = PACKETJ(adev->jpeg.internal.jpeg_pitch, 0, 0, PACKETJ_TYPE0);
+	ib->ptr[0] = PACKETJ(adev->jpeg.internal.jpeg_pitch, 0, 0,
+			     PACKETJ_TYPE0);
 	ib->ptr[1] = 0xDEADBEEF;
 	for (i = 2; i < 16; i += 2) {
 		ib->ptr[i] = PACKETJ(0, 0, 0, PACKETJ_TYPE6);
diff --git a/drivers/gpu/drm/amd/amdgpu/amdgpu_ttm.c b/drivers/gpu/drm/amd/amdgpu/amdgpu_ttm.c
index 4fabb194ef89..b64586732129 100644
--- a/drivers/gpu/drm/amd/amdgpu/amdgpu_ttm.c
+++ b/drivers/gpu/drm/amd/amdgpu/amdgpu_ttm.c
@@ -189,7 +189,6 @@ static int amdgpu_ttm_map_buffer(struct ttm_buffer_object *bo,
 	struct amdgpu_device *adev = ring->adev;
 	unsigned offset, num_pages, num_dw, num_bytes;
 	uint64_t src_addr, dst_addr;
-	struct dma_fence *fence;
 	struct amdgpu_job *job;
 	void *cpu_addr;
 	uint64_t flags;
@@ -229,7 +228,9 @@ static int amdgpu_ttm_map_buffer(struct ttm_buffer_object *bo,
 	num_dw = ALIGN(adev->mman.buffer_funcs->copy_num_dw, 8);
 	num_bytes = num_pages * 8 * AMDGPU_GPU_PAGES_IN_CPU_PAGE;
 
-	r = amdgpu_job_alloc_with_ib(adev, num_dw * 4 + num_bytes,
+	r = amdgpu_job_alloc_with_ib(adev, &adev->mman.entity,
+				     AMDGPU_FENCE_OWNER_UNDEFINED,
+				     num_dw * 4 + num_bytes,
 				     AMDGPU_IB_POOL_DELAYED, &job);
 	if (r)
 		return r;
@@ -269,18 +270,8 @@ static int amdgpu_ttm_map_buffer(struct ttm_buffer_object *bo,
 		}
 	}
 
-	r = amdgpu_job_submit(job, &adev->mman.entity,
-			      AMDGPU_FENCE_OWNER_UNDEFINED, &fence);
-	if (r)
-		goto error_free;
-
-	dma_fence_put(fence);
-
-	return r;
-
-error_free:
-	amdgpu_job_free(job);
-	return r;
+	dma_fence_put(amdgpu_job_submit(job));
+	return 0;
 }
 
 /**
@@ -1425,7 +1416,8 @@ static void amdgpu_ttm_vram_mm_access(struct amdgpu_device *adev, loff_t pos,
 }
 
 static int amdgpu_ttm_access_memory_sdma(struct ttm_buffer_object *bo,
-					unsigned long offset, void *buf, int len, int write)
+					unsigned long offset, void *buf,
+					int len, int write)
 {
 	struct amdgpu_bo *abo = ttm_to_amdgpu_bo(bo);
 	struct amdgpu_device *adev = amdgpu_ttm_adev(abo->tbo.bdev);
@@ -1449,26 +1441,27 @@ static int amdgpu_ttm_access_memory_sdma(struct ttm_buffer_object *bo,
 		memcpy(adev->mman.sdma_access_ptr, buf, len);
 
 	num_dw = ALIGN(adev->mman.buffer_funcs->copy_num_dw, 8);
-	r = amdgpu_job_alloc_with_ib(adev, num_dw * 4, AMDGPU_IB_POOL_DELAYED, &job);
+	r = amdgpu_job_alloc_with_ib(adev, &adev->mman.entity,
+				     AMDGPU_FENCE_OWNER_UNDEFINED,
+				     num_dw * 4, AMDGPU_IB_POOL_DELAYED,
+				     &job);
 	if (r)
 		goto out;
 
 	amdgpu_res_first(abo->tbo.resource, offset, len, &src_mm);
-	src_addr = amdgpu_ttm_domain_start(adev, bo->resource->mem_type) + src_mm.start;
+	src_addr = amdgpu_ttm_domain_start(adev, bo->resource->mem_type) +
+		src_mm.start;
 	dst_addr = amdgpu_bo_gpu_offset(adev->mman.sdma_access_bo);
 	if (write)
 		swap(src_addr, dst_addr);
 
-	amdgpu_emit_copy_buffer(adev, &job->ibs[0], src_addr, dst_addr, PAGE_SIZE, false);
+	amdgpu_emit_copy_buffer(adev, &job->ibs[0], src_addr, dst_addr,
+				PAGE_SIZE, false);
 
 	amdgpu_ring_pad_ib(adev->mman.buffer_funcs_ring, &job->ibs[0]);
 	WARN_ON(job->ibs[0].length_dw > num_dw);
 
-	r = amdgpu_job_submit(job, &adev->mman.entity, AMDGPU_FENCE_OWNER_UNDEFINED, &fence);
-	if (r) {
-		amdgpu_job_free(job);
-		goto out;
-	}
+	fence = amdgpu_job_submit(job);
 
 	if (!dma_fence_wait_timeout(fence, false, adev->sdma_timeout))
 		r = -ETIMEDOUT;
@@ -1967,7 +1960,9 @@ static int amdgpu_ttm_prepare_job(struct amdgpu_device *adev,
 		AMDGPU_IB_POOL_DELAYED;
 	int r;
 
-	r = amdgpu_job_alloc_with_ib(adev, num_dw * 4, pool, job);
+	r = amdgpu_job_alloc_with_ib(adev, &adev->mman.entity,
+				     AMDGPU_FENCE_OWNER_UNDEFINED,
+				     num_dw * 4, pool, job);
 	if (r)
 		return r;
 
@@ -2026,8 +2021,7 @@ int amdgpu_copy_buffer(struct amdgpu_ring *ring, uint64_t src_offset,
 	if (direct_submit)
 		r = amdgpu_job_submit_direct(job, ring, fence);
 	else
-		r = amdgpu_job_submit(job, &adev->mman.entity,
-				      AMDGPU_FENCE_OWNER_UNDEFINED, fence);
+		*fence = amdgpu_job_submit(job);
 	if (r)
 		goto error_free;
 
@@ -2072,16 +2066,8 @@ static int amdgpu_ttm_fill_mem(struct amdgpu_ring *ring, uint32_t src_data,
 
 	amdgpu_ring_pad_ib(ring, &job->ibs[0]);
 	WARN_ON(job->ibs[0].length_dw > num_dw);
-	r = amdgpu_job_submit(job, &adev->mman.entity,
-			      AMDGPU_FENCE_OWNER_UNDEFINED, fence);
-	if (r)
-		goto error_free;
-
+	*fence = amdgpu_job_submit(job);
 	return 0;
-
-error_free:
-	amdgpu_job_free(job);
-	return r;
 }
 
 int amdgpu_fill_buffer(struct amdgpu_bo *bo,
diff --git a/drivers/gpu/drm/amd/amdgpu/amdgpu_uvd.c b/drivers/gpu/drm/amd/amdgpu/amdgpu_uvd.c
index 6eac649499d3..8baddf79635b 100644
--- a/drivers/gpu/drm/amd/amdgpu/amdgpu_uvd.c
+++ b/drivers/gpu/drm/amd/amdgpu/amdgpu_uvd.c
@@ -1132,7 +1132,9 @@ static int amdgpu_uvd_send_msg(struct amdgpu_ring *ring, struct amdgpu_bo *bo,
 	unsigned offset_idx = 0;
 	unsigned offset[3] = { UVD_BASE_SI, 0, 0 };
 
-	r = amdgpu_job_alloc_with_ib(adev, 64, direct ? AMDGPU_IB_POOL_DIRECT :
+	r = amdgpu_job_alloc_with_ib(ring->adev, &adev->uvd.entity,
+				     AMDGPU_FENCE_OWNER_UNDEFINED,
+				     64, direct ? AMDGPU_IB_POOL_DIRECT :
 				     AMDGPU_IB_POOL_DELAYED, &job);
 	if (r)
 		return r;
@@ -1181,10 +1183,7 @@ static int amdgpu_uvd_send_msg(struct amdgpu_ring *ring, struct amdgpu_bo *bo,
 		if (r)
 			goto err_free;
 
-		r = amdgpu_job_submit(job, &adev->uvd.entity,
-				      AMDGPU_FENCE_OWNER_UNDEFINED, &f);
-		if (r)
-			goto err_free;
+		f = amdgpu_job_submit(job);
 	}
 
 	amdgpu_bo_reserve(bo, true);
diff --git a/drivers/gpu/drm/amd/amdgpu/amdgpu_vce.c b/drivers/gpu/drm/amd/amdgpu/amdgpu_vce.c
index 02cb3a12dd76..b239e874f2d5 100644
--- a/drivers/gpu/drm/amd/amdgpu/amdgpu_vce.c
+++ b/drivers/gpu/drm/amd/amdgpu/amdgpu_vce.c
@@ -450,8 +450,10 @@ static int amdgpu_vce_get_create_msg(struct amdgpu_ring *ring, uint32_t handle,
 	uint64_t addr;
 	int i, r;
 
-	r = amdgpu_job_alloc_with_ib(ring->adev, ib_size_dw * 4,
-				     AMDGPU_IB_POOL_DIRECT, &job);
+	r = amdgpu_job_alloc_with_ib(ring->adev, &ring->adev->vce.entity,
+				     AMDGPU_FENCE_OWNER_UNDEFINED,
+				     ib_size_dw * 4, AMDGPU_IB_POOL_DIRECT,
+				     &job);
 	if (r)
 		return r;
 
@@ -538,7 +540,9 @@ static int amdgpu_vce_get_destroy_msg(struct amdgpu_ring *ring, uint32_t handle,
 	struct dma_fence *f = NULL;
 	int i, r;
 
-	r = amdgpu_job_alloc_with_ib(ring->adev, ib_size_dw * 4,
+	r = amdgpu_job_alloc_with_ib(ring->adev, &ring->adev->vce.entity,
+				     AMDGPU_FENCE_OWNER_UNDEFINED,
+				     ib_size_dw * 4,
 				     direct ? AMDGPU_IB_POOL_DIRECT :
 				     AMDGPU_IB_POOL_DELAYED, &job);
 	if (r)
@@ -570,8 +574,7 @@ static int amdgpu_vce_get_destroy_msg(struct amdgpu_ring *ring, uint32_t handle,
 	if (direct)
 		r = amdgpu_job_submit_direct(job, ring, &f);
 	else
-		r = amdgpu_job_submit(job, &ring->adev->vce.entity,
-				      AMDGPU_FENCE_OWNER_UNDEFINED, &f);
+		f = amdgpu_job_submit(job);
 	if (r)
 		goto err;
 
diff --git a/drivers/gpu/drm/amd/amdgpu/amdgpu_vcn.c b/drivers/gpu/drm/amd/amdgpu/amdgpu_vcn.c
index f36e4f08db6d..dda05f8a6166 100644
--- a/drivers/gpu/drm/amd/amdgpu/amdgpu_vcn.c
+++ b/drivers/gpu/drm/amd/amdgpu/amdgpu_vcn.c
@@ -600,15 +600,16 @@ static int amdgpu_vcn_dec_send_msg(struct amdgpu_ring *ring,
 				   struct amdgpu_ib *ib_msg,
 				   struct dma_fence **fence)
 {
+	uint64_t addr = AMDGPU_GPU_PAGE_ALIGN(ib_msg->gpu_addr);
 	struct amdgpu_device *adev = ring->adev;
 	struct dma_fence *f = NULL;
 	struct amdgpu_job *job;
 	struct amdgpu_ib *ib;
-	uint64_t addr = AMDGPU_GPU_PAGE_ALIGN(ib_msg->gpu_addr);
 	int i, r;
 
-	r = amdgpu_job_alloc_with_ib(adev, 64,
-					AMDGPU_IB_POOL_DIRECT, &job);
+	r = amdgpu_job_alloc_with_ib(ring->adev, NULL, NULL,
+				     64, AMDGPU_IB_POOL_DIRECT,
+				     &job);
 	if (r)
 		goto err;
 
@@ -787,8 +788,9 @@ static int amdgpu_vcn_dec_sw_send_msg(struct amdgpu_ring *ring,
 	if (sq)
 		ib_size_dw += 8;
 
-	r = amdgpu_job_alloc_with_ib(adev, ib_size_dw * 4,
-				AMDGPU_IB_POOL_DIRECT, &job);
+	r = amdgpu_job_alloc_with_ib(ring->adev, NULL, NULL,
+				     ib_size_dw * 4, AMDGPU_IB_POOL_DIRECT,
+				     &job);
 	if (r)
 		goto err;
 
@@ -916,8 +918,9 @@ static int amdgpu_vcn_enc_get_create_msg(struct amdgpu_ring *ring, uint32_t hand
 	if (sq)
 		ib_size_dw += 8;
 
-	r = amdgpu_job_alloc_with_ib(ring->adev, ib_size_dw * 4,
-					AMDGPU_IB_POOL_DIRECT, &job);
+	r = amdgpu_job_alloc_with_ib(ring->adev, NULL, NULL,
+				     ib_size_dw * 4, AMDGPU_IB_POOL_DIRECT,
+				     &job);
 	if (r)
 		return r;
 
@@ -982,8 +985,9 @@ static int amdgpu_vcn_enc_get_destroy_msg(struct amdgpu_ring *ring, uint32_t han
 	if (sq)
 		ib_size_dw += 8;
 
-	r = amdgpu_job_alloc_with_ib(ring->adev, ib_size_dw * 4,
-					AMDGPU_IB_POOL_DIRECT, &job);
+	r = amdgpu_job_alloc_with_ib(ring->adev, NULL, NULL,
+				     ib_size_dw * 4, AMDGPU_IB_POOL_DIRECT,
+				     &job);
 	if (r)
 		return r;
 
diff --git a/drivers/gpu/drm/amd/amdgpu/amdgpu_vm_sdma.c b/drivers/gpu/drm/amd/amdgpu/amdgpu_vm_sdma.c
index 2b0669c464f6..6768af365f3b 100644
--- a/drivers/gpu/drm/amd/amdgpu/amdgpu_vm_sdma.c
+++ b/drivers/gpu/drm/amd/amdgpu/amdgpu_vm_sdma.c
@@ -47,6 +47,32 @@ static int amdgpu_vm_sdma_map_table(struct amdgpu_bo_vm *table)
 	return r;
 }
 
+/* Allocate a new job for @count PTE updates */
+static int amdgpu_vm_sdma_alloc_job(struct amdgpu_vm_update_params *p,
+				    unsigned int count)
+{
+	enum amdgpu_ib_pool_type pool = p->immediate ? AMDGPU_IB_POOL_IMMEDIATE
+		: AMDGPU_IB_POOL_DELAYED;
+	struct drm_sched_entity *entity = p->immediate ? &p->vm->immediate
+		: &p->vm->delayed;
+	unsigned int ndw;
+	int r;
+
+	/* estimate how many dw we need */
+	ndw = AMDGPU_VM_SDMA_MIN_NUM_DW;
+	if (p->pages_addr)
+		ndw += count * 2;
+	ndw = min(ndw, AMDGPU_VM_SDMA_MAX_NUM_DW);
+
+	r = amdgpu_job_alloc_with_ib(p->adev, entity, AMDGPU_FENCE_OWNER_VM,
+				     ndw * 4, pool, &p->job);
+	if (r)
+		return r;
+
+	p->num_dw_left = ndw;
+	return 0;
+}
+
 /**
  * amdgpu_vm_sdma_prepare - prepare SDMA command submission
  *
@@ -61,17 +87,12 @@ static int amdgpu_vm_sdma_prepare(struct amdgpu_vm_update_params *p,
 				  struct dma_resv *resv,
 				  enum amdgpu_sync_mode sync_mode)
 {
-	enum amdgpu_ib_pool_type pool = p->immediate ? AMDGPU_IB_POOL_IMMEDIATE
-		: AMDGPU_IB_POOL_DELAYED;
-	unsigned int ndw = AMDGPU_VM_SDMA_MIN_NUM_DW;
 	int r;
 
-	r = amdgpu_job_alloc_with_ib(p->adev, ndw * 4, pool, &p->job);
+	r = amdgpu_vm_sdma_alloc_job(p, 0);
 	if (r)
 		return r;
 
-	p->num_dw_left = ndw;
-
 	if (!resv)
 		return 0;
 
@@ -91,20 +112,16 @@ static int amdgpu_vm_sdma_commit(struct amdgpu_vm_update_params *p,
 				 struct dma_fence **fence)
 {
 	struct amdgpu_ib *ib = p->job->ibs;
-	struct drm_sched_entity *entity;
 	struct amdgpu_ring *ring;
 	struct dma_fence *f;
-	int r;
 
-	entity = p->immediate ? &p->vm->immediate : &p->vm->delayed;
-	ring = container_of(entity->rq->sched, struct amdgpu_ring, sched);
+	ring = container_of(p->vm->delayed.rq->sched, struct amdgpu_ring,
+			    sched);
 
 	WARN_ON(ib->length_dw == 0);
 	amdgpu_ring_pad_ib(ring, ib);
 	WARN_ON(ib->length_dw > p->num_dw_left);
-	r = amdgpu_job_submit(p->job, entity, AMDGPU_FENCE_OWNER_VM, &f);
-	if (r)
-		goto error;
+	f = amdgpu_job_submit(p->job);
 
 	if (p->unlocked) {
 		struct dma_fence *tmp = dma_fence_get(f);
@@ -120,10 +137,6 @@ static int amdgpu_vm_sdma_commit(struct amdgpu_vm_update_params *p,
 		swap(*fence, f);
 	dma_fence_put(f);
 	return 0;
-
-error:
-	amdgpu_job_free(p->job);
-	return r;
 }
 
 /**
@@ -203,8 +216,6 @@ static int amdgpu_vm_sdma_update(struct amdgpu_vm_update_params *p,
 				 uint64_t flags)
 {
 	struct amdgpu_bo *bo = &vmbo->bo;
-	enum amdgpu_ib_pool_type pool = p->immediate ? AMDGPU_IB_POOL_IMMEDIATE
-		: AMDGPU_IB_POOL_DELAYED;
 	struct dma_resv_iter cursor;
 	unsigned int i, ndw, nptes;
 	struct dma_fence *fence;
@@ -231,19 +242,9 @@ static int amdgpu_vm_sdma_update(struct amdgpu_vm_update_params *p,
 			if (r)
 				return r;
 
-			/* estimate how many dw we need */
-			ndw = 32;
-			if (p->pages_addr)
-				ndw += count * 2;
-			ndw = max(ndw, AMDGPU_VM_SDMA_MIN_NUM_DW);
-			ndw = min(ndw, AMDGPU_VM_SDMA_MAX_NUM_DW);
-
-			r = amdgpu_job_alloc_with_ib(p->adev, ndw * 4, pool,
-						     &p->job);
+			r = amdgpu_vm_sdma_alloc_job(p, count);
 			if (r)
 				return r;
-
-			p->num_dw_left = ndw;
 		}
 
 		if (!p->pages_addr) {
diff --git a/drivers/gpu/drm/amd/amdgpu/gmc_v10_0.c b/drivers/gpu/drm/amd/amdgpu/gmc_v10_0.c
index f513e2c2e964..657e53708248 100644
--- a/drivers/gpu/drm/amd/amdgpu/gmc_v10_0.c
+++ b/drivers/gpu/drm/amd/amdgpu/gmc_v10_0.c
@@ -371,7 +371,9 @@ static void gmc_v10_0_flush_gpu_tlb(struct amdgpu_device *adev, uint32_t vmid,
 	 * translation. Avoid this by doing the invalidation from the SDMA
 	 * itself.
 	 */
-	r = amdgpu_job_alloc_with_ib(adev, 16 * 4, AMDGPU_IB_POOL_IMMEDIATE,
+	r = amdgpu_job_alloc_with_ib(ring->adev, &adev->mman.entity,
+				     AMDGPU_FENCE_OWNER_UNDEFINED,
+				     16 * 4, AMDGPU_IB_POOL_IMMEDIATE,
 				     &job);
 	if (r)
 		goto error_alloc;
@@ -380,10 +382,7 @@ static void gmc_v10_0_flush_gpu_tlb(struct amdgpu_device *adev, uint32_t vmid,
 	job->vm_needs_flush = true;
 	job->ibs->ptr[job->ibs->length_dw++] = ring->funcs->nop;
 	amdgpu_ring_pad_ib(ring, &job->ibs[0]);
-	r = amdgpu_job_submit(job, &adev->mman.entity,
-			      AMDGPU_FENCE_OWNER_UNDEFINED, &fence);
-	if (r)
-		goto error_submit;
+	fence = amdgpu_job_submit(job);
 
 	mutex_unlock(&adev->mman.gtt_window_lock);
 
@@ -392,9 +391,6 @@ static void gmc_v10_0_flush_gpu_tlb(struct amdgpu_device *adev, uint32_t vmid,
 
 	return;
 
-error_submit:
-	amdgpu_job_free(job);
-
 error_alloc:
 	mutex_unlock(&adev->mman.gtt_window_lock);
 	DRM_ERROR("Error flushing GPU TLB using the SDMA (%d)!\n", r);
diff --git a/drivers/gpu/drm/amd/amdgpu/uvd_v6_0.c b/drivers/gpu/drm/amd/amdgpu/uvd_v6_0.c
index 375c440957dc..5fe872f4bea7 100644
--- a/drivers/gpu/drm/amd/amdgpu/uvd_v6_0.c
+++ b/drivers/gpu/drm/amd/amdgpu/uvd_v6_0.c
@@ -216,8 +216,8 @@ static int uvd_v6_0_enc_get_create_msg(struct amdgpu_ring *ring, uint32_t handle
 	uint64_t addr;
 	int i, r;
 
-	r = amdgpu_job_alloc_with_ib(ring->adev, ib_size_dw * 4,
-					AMDGPU_IB_POOL_DIRECT, &job);
+	r = amdgpu_job_alloc_with_ib(ring->adev, NULL, NULL, ib_size_dw * 4,
+				     AMDGPU_IB_POOL_DIRECT, &job);
 	if (r)
 		return r;
 
@@ -280,8 +280,8 @@ static int uvd_v6_0_enc_get_destroy_msg(struct amdgpu_ring *ring,
 	uint64_t addr;
 	int i, r;
 
-	r = amdgpu_job_alloc_with_ib(ring->adev, ib_size_dw * 4,
-					AMDGPU_IB_POOL_DIRECT, &job);
+	r = amdgpu_job_alloc_with_ib(ring->adev, NULL, NULL, ib_size_dw * 4,
+				     AMDGPU_IB_POOL_DIRECT, &job);
 	if (r)
 		return r;
 
diff --git a/drivers/gpu/drm/amd/amdgpu/uvd_v7_0.c b/drivers/gpu/drm/amd/amdgpu/uvd_v7_0.c
index e668b3baa8c6..1c0210de8455 100644
--- a/drivers/gpu/drm/amd/amdgpu/uvd_v7_0.c
+++ b/drivers/gpu/drm/amd/amdgpu/uvd_v7_0.c
@@ -213,7 +213,8 @@ static int uvd_v7_0_enc_ring_test_ring(struct amdgpu_ring *ring)
  *
  * Open up a stream for HW test
  */
-static int uvd_v7_0_enc_get_create_msg(struct amdgpu_ring *ring, uint32_t handle,
+static int uvd_v7_0_enc_get_create_msg(struct amdgpu_ring *ring,
+				       uint32_t handle,
 				       struct amdgpu_bo *bo,
 				       struct dma_fence **fence)
 {
@@ -224,8 +225,8 @@ static int uvd_v7_0_enc_get_create_msg(struct amdgpu_ring *ring, uint32_t handle
 	uint64_t addr;
 	int i, r;
 
-	r = amdgpu_job_alloc_with_ib(ring->adev, ib_size_dw * 4,
-					AMDGPU_IB_POOL_DIRECT, &job);
+	r = amdgpu_job_alloc_with_ib(ring->adev, NULL, NULL, ib_size_dw * 4,
+				     AMDGPU_IB_POOL_DIRECT, &job);
 	if (r)
 		return r;
 
@@ -276,7 +277,8 @@ static int uvd_v7_0_enc_get_create_msg(struct amdgpu_ring *ring, uint32_t handle
  *
  * Close up a stream for HW test or if userspace failed to do so
  */
-static int uvd_v7_0_enc_get_destroy_msg(struct amdgpu_ring *ring, uint32_t handle,
+static int uvd_v7_0_enc_get_destroy_msg(struct amdgpu_ring *ring,
+					uint32_t handle,
 					struct amdgpu_bo *bo,
 					struct dma_fence **fence)
 {
@@ -287,8 +289,8 @@ static int uvd_v7_0_enc_get_destroy_msg(struct amdgpu_ring *ring, uint32_t handl
 	uint64_t addr;
 	int i, r;
 
-	r = amdgpu_job_alloc_with_ib(ring->adev, ib_size_dw * 4,
-					AMDGPU_IB_POOL_DIRECT, &job);
+	r = amdgpu_job_alloc_with_ib(ring->adev, NULL, NULL, ib_size_dw * 4,
+				     AMDGPU_IB_POOL_DIRECT, &job);
 	if (r)
 		return r;
 
diff --git a/drivers/gpu/drm/amd/amdkfd/kfd_migrate.c b/drivers/gpu/drm/amd/amdkfd/kfd_migrate.c
index dd56d7678876..cd2909d0ad26 100644
--- a/drivers/gpu/drm/amd/amdkfd/kfd_migrate.c
+++ b/drivers/gpu/drm/amd/amdkfd/kfd_migrate.c
@@ -65,8 +65,11 @@ svm_migrate_gart_map(struct amdgpu_ring *ring, uint64_t npages,
 	num_dw = ALIGN(adev->mman.buffer_funcs->copy_num_dw, 8);
 	num_bytes = npages * 8;
 
-	r = amdgpu_job_alloc_with_ib(adev, num_dw * 4 + num_bytes,
-				     AMDGPU_IB_POOL_DELAYED, &job);
+	r = amdgpu_job_alloc_with_ib(adev, &adev->mman.entity,
+				     AMDGPU_FENCE_OWNER_UNDEFINED,
+				     num_dw * 4 + num_bytes,
+				     AMDGPU_IB_POOL_DELAYED,
+				     &job);
 	if (r)
 		return r;
 
@@ -89,18 +92,10 @@ svm_migrate_gart_map(struct amdgpu_ring *ring, uint64_t npages,
 	cpu_addr = &job->ibs[0].ptr[num_dw];
 
 	amdgpu_gart_map(adev, 0, npages, addr, pte_flags, cpu_addr);
-	r = amdgpu_job_submit(job, &adev->mman.entity,
-			      AMDGPU_FENCE_OWNER_UNDEFINED, &fence);
-	if (r)
-		goto error_free;
-
+	fence = amdgpu_job_submit(job);
 	dma_fence_put(fence);
 
 	return r;
-
-error_free:
-	amdgpu_job_free(job);
-	return r;
 }
 
 /**
-- 
2.25.1

[PATCH 07/13] drm/amdgpu: move explicit sync check into the CS

[Christian König]

This moves the memory allocation out of the critical code path.

Signed-off-by: Christian König <christian.koenig@amd.com>
---
 drivers/gpu/drm/amd/amdgpu/amdgpu_cs.c  | 13 ++++++++++++-
 drivers/gpu/drm/amd/amdgpu/amdgpu_ib.c  |  2 +-
 drivers/gpu/drm/amd/amdgpu/amdgpu_job.c | 12 +++---------
 drivers/gpu/drm/amd/amdgpu/amdgpu_job.h |  2 +-
 4 files changed, 17 insertions(+), 12 deletions(-)

diff --git a/drivers/gpu/drm/amd/amdgpu/amdgpu_cs.c b/drivers/gpu/drm/amd/amdgpu/amdgpu_cs.c
index aa6f6c428dbc..d45b86bcf7fa 100644
--- a/drivers/gpu/drm/amd/amdgpu/amdgpu_cs.c
+++ b/drivers/gpu/drm/amd/amdgpu/amdgpu_cs.c
@@ -449,8 +449,19 @@ static int amdgpu_syncobj_lookup_and_add(struct amdgpu_cs_parser *p,
 	}
 
 	r = amdgpu_sync_fence(&p->gang_leader->sync, fence);
-	dma_fence_put(fence);
+	if (r)
+		goto error;
+
+	/*
+	 * When we have an explicit dependency it might be necessary to insert a
+	 * pipeline sync to make sure that all caches etc are flushed and the
+	 * next job actually sees the results from the previous one.
+	 */
+	if (fence->context == p->gang_leader->base.entity->fence_context)
+		r = amdgpu_sync_fence(&p->gang_leader->explicit_sync, fence);
 
+error:
+	dma_fence_put(fence);
 	return r;
 }
 
diff --git a/drivers/gpu/drm/amd/amdgpu/amdgpu_ib.c b/drivers/gpu/drm/amd/amdgpu/amdgpu_ib.c
index 258cffe3c06a..774c77bb8f4e 100644
--- a/drivers/gpu/drm/amd/amdgpu/amdgpu_ib.c
+++ b/drivers/gpu/drm/amd/amdgpu/amdgpu_ib.c
@@ -182,7 +182,7 @@ int amdgpu_ib_schedule(struct amdgpu_ring *ring, unsigned num_ibs,
 
 	need_ctx_switch = ring->current_ctx != fence_ctx;
 	if (ring->funcs->emit_pipeline_sync && job &&
-	    ((tmp = amdgpu_sync_get_fence(&job->sched_sync)) ||
+	    ((tmp = amdgpu_sync_get_fence(&job->explicit_sync)) ||
 	     (amdgpu_sriov_vf(adev) && need_ctx_switch) ||
 	     amdgpu_vm_need_pipeline_sync(ring, job))) {
 		need_pipe_sync = true;
diff --git a/drivers/gpu/drm/amd/amdgpu/amdgpu_job.c b/drivers/gpu/drm/amd/amdgpu/amdgpu_job.c
index 26e5584e7eea..139b9526072a 100644
--- a/drivers/gpu/drm/amd/amdgpu/amdgpu_job.c
+++ b/drivers/gpu/drm/amd/amdgpu/amdgpu_job.c
@@ -108,7 +108,7 @@ int amdgpu_job_alloc(struct amdgpu_device *adev, struct amdgpu_vm *vm,
 	(*job)->vm = vm;
 
 	amdgpu_sync_create(&(*job)->sync);
-	amdgpu_sync_create(&(*job)->sched_sync);
+	amdgpu_sync_create(&(*job)->explicit_sync);
 	(*job)->vram_lost_counter = atomic_read(&adev->vram_lost_counter);
 	(*job)->vm_pd_addr = AMDGPU_BO_INVALID_OFFSET;
 
@@ -176,7 +176,7 @@ static void amdgpu_job_free_cb(struct drm_sched_job *s_job)
 	drm_sched_job_cleanup(s_job);
 
 	amdgpu_sync_free(&job->sync);
-	amdgpu_sync_free(&job->sched_sync);
+	amdgpu_sync_free(&job->explicit_sync);
 
 	dma_fence_put(&job->hw_fence);
 }
@@ -204,7 +204,7 @@ void amdgpu_job_free(struct amdgpu_job *job)
 
 	amdgpu_job_free_resources(job);
 	amdgpu_sync_free(&job->sync);
-	amdgpu_sync_free(&job->sched_sync);
+	amdgpu_sync_free(&job->explicit_sync);
 	if (job->gang_submit != &job->base.s_fence->scheduled)
 		dma_fence_put(job->gang_submit);
 
@@ -251,12 +251,6 @@ amdgpu_job_dependency(struct drm_sched_job *sched_job,
 	int r;
 
 	fence = amdgpu_sync_get_fence(&job->sync);
-	if (fence && drm_sched_dependency_optimized(fence, s_entity)) {
-		r = amdgpu_sync_fence(&job->sched_sync, fence);
-		if (r)
-			DRM_ERROR("Error adding fence (%d)\n", r);
-	}
-
 	while (fence == NULL && job->vm && !job->vmid) {
 		r = amdgpu_vmid_grab(job->vm, ring, job, &fence);
 		if (r)
diff --git a/drivers/gpu/drm/amd/amdgpu/amdgpu_job.h b/drivers/gpu/drm/amd/amdgpu/amdgpu_job.h
index f099210c386a..9c10b9bd0084 100644
--- a/drivers/gpu/drm/amd/amdgpu/amdgpu_job.h
+++ b/drivers/gpu/drm/amd/amdgpu/amdgpu_job.h
@@ -48,7 +48,7 @@ struct amdgpu_job {
 	struct drm_sched_job    base;
 	struct amdgpu_vm	*vm;
 	struct amdgpu_sync	sync;
-	struct amdgpu_sync	sched_sync;
+	struct amdgpu_sync	explicit_sync;
 	struct dma_fence	hw_fence;
 	struct dma_fence	*gang_submit;
 	uint32_t		preamble_status;
-- 
2.25.1

[PATCH 08/13] drm/amdgpu: use scheduler depenencies for VM updates

[Christian König]

Instead of putting that into the job sync object.

Signed-off-by: Christian König <christian.koenig@amd.com>
---
 drivers/gpu/drm/amd/amdgpu/amdgpu_sync.c    | 56 +++++++++++++++------
 drivers/gpu/drm/amd/amdgpu/amdgpu_sync.h    |  2 +
 drivers/gpu/drm/amd/amdgpu/amdgpu_vm_sdma.c | 10 +++-
 3 files changed, 52 insertions(+), 16 deletions(-)

diff --git a/drivers/gpu/drm/amd/amdgpu/amdgpu_sync.c b/drivers/gpu/drm/amd/amdgpu/amdgpu_sync.c
index 090e66a1b284..bac7976975bd 100644
--- a/drivers/gpu/drm/amd/amdgpu/amdgpu_sync.c
+++ b/drivers/gpu/drm/amd/amdgpu/amdgpu_sync.c
@@ -259,6 +259,14 @@ int amdgpu_sync_resv(struct amdgpu_device *adev, struct amdgpu_sync *sync,
 	return 0;
 }
 
+/* Free the entry back to the slab */
+static void amdgpu_sync_entry_free(struct amdgpu_sync_entry *e)
+{
+	hash_del(&e->node);
+	dma_fence_put(e->fence);
+	kmem_cache_free(amdgpu_sync_slab, e);
+}
+
 /**
  * amdgpu_sync_peek_fence - get the next fence not signaled yet
  *
@@ -280,9 +288,7 @@ struct dma_fence *amdgpu_sync_peek_fence(struct amdgpu_sync *sync,
 		struct drm_sched_fence *s_fence = to_drm_sched_fence(f);
 
 		if (dma_fence_is_signaled(f)) {
-			hash_del(&e->node);
-			dma_fence_put(f);
-			kmem_cache_free(amdgpu_sync_slab, e);
+			amdgpu_sync_entry_free(e);
 			continue;
 		}
 		if (ring && s_fence) {
@@ -355,15 +361,42 @@ int amdgpu_sync_clone(struct amdgpu_sync *source, struct amdgpu_sync *clone)
 			if (r)
 				return r;
 		} else {
-			hash_del(&e->node);
-			dma_fence_put(f);
-			kmem_cache_free(amdgpu_sync_slab, e);
+			amdgpu_sync_entry_free(e);
 		}
 	}
 
 	return 0;
 }
 
+/**
+ * amdgpu_sync_push_to_job - push fences into job
+ * @sync: sync object to get the fences from
+ * @job: job to push the fences into
+ *
+ * Add all unsignaled fences from sync to job.
+ */
+int amdgpu_sync_push_to_job(struct amdgpu_sync *sync, struct amdgpu_job *job)
+{
+	struct amdgpu_sync_entry *e;
+	struct hlist_node *tmp;
+	struct dma_fence *f;
+	int i, r;
+
+	hash_for_each_safe(sync->fences, i, tmp, e, node) {
+		f = e->fence;
+		if (dma_fence_is_signaled(f)) {
+			amdgpu_sync_entry_free(e);
+			continue;
+		}
+
+		dma_fence_get(f);
+		r = drm_sched_job_add_dependency(&job->base, f);
+		if (r)
+			return r;
+	}
+	return 0;
+}
+
 int amdgpu_sync_wait(struct amdgpu_sync *sync, bool intr)
 {
 	struct amdgpu_sync_entry *e;
@@ -375,9 +408,7 @@ int amdgpu_sync_wait(struct amdgpu_sync *sync, bool intr)
 		if (r)
 			return r;
 
-		hash_del(&e->node);
-		dma_fence_put(e->fence);
-		kmem_cache_free(amdgpu_sync_slab, e);
+		amdgpu_sync_entry_free(e);
 	}
 
 	return 0;
@@ -396,11 +427,8 @@ void amdgpu_sync_free(struct amdgpu_sync *sync)
 	struct hlist_node *tmp;
 	unsigned int i;
 
-	hash_for_each_safe(sync->fences, i, tmp, e, node) {
-		hash_del(&e->node);
-		dma_fence_put(e->fence);
-		kmem_cache_free(amdgpu_sync_slab, e);
-	}
+	hash_for_each_safe(sync->fences, i, tmp, e, node)
+		amdgpu_sync_entry_free(e);
 }
 
 /**
diff --git a/drivers/gpu/drm/amd/amdgpu/amdgpu_sync.h b/drivers/gpu/drm/amd/amdgpu/amdgpu_sync.h
index 2d5c613cda10..cf1e9e858efd 100644
--- a/drivers/gpu/drm/amd/amdgpu/amdgpu_sync.h
+++ b/drivers/gpu/drm/amd/amdgpu/amdgpu_sync.h
@@ -30,6 +30,7 @@ struct dma_fence;
 struct dma_resv;
 struct amdgpu_device;
 struct amdgpu_ring;
+struct amdgpu_job;
 
 enum amdgpu_sync_mode {
 	AMDGPU_SYNC_ALWAYS,
@@ -54,6 +55,7 @@ struct dma_fence *amdgpu_sync_peek_fence(struct amdgpu_sync *sync,
 				     struct amdgpu_ring *ring);
 struct dma_fence *amdgpu_sync_get_fence(struct amdgpu_sync *sync);
 int amdgpu_sync_clone(struct amdgpu_sync *source, struct amdgpu_sync *clone);
+int amdgpu_sync_push_to_job(struct amdgpu_sync *sync, struct amdgpu_job *job);
 int amdgpu_sync_wait(struct amdgpu_sync *sync, bool intr);
 void amdgpu_sync_free(struct amdgpu_sync *sync);
 int amdgpu_sync_init(void);
diff --git a/drivers/gpu/drm/amd/amdgpu/amdgpu_vm_sdma.c b/drivers/gpu/drm/amd/amdgpu/amdgpu_vm_sdma.c
index 6768af365f3b..df6fd6d6a82c 100644
--- a/drivers/gpu/drm/amd/amdgpu/amdgpu_vm_sdma.c
+++ b/drivers/gpu/drm/amd/amdgpu/amdgpu_vm_sdma.c
@@ -87,6 +87,7 @@ static int amdgpu_vm_sdma_prepare(struct amdgpu_vm_update_params *p,
 				  struct dma_resv *resv,
 				  enum amdgpu_sync_mode sync_mode)
 {
+	struct amdgpu_sync sync;
 	int r;
 
 	r = amdgpu_vm_sdma_alloc_job(p, 0);
@@ -96,7 +97,12 @@ static int amdgpu_vm_sdma_prepare(struct amdgpu_vm_update_params *p,
 	if (!resv)
 		return 0;
 
-	return amdgpu_sync_resv(p->adev, &p->job->sync, resv, sync_mode, p->vm);
+	amdgpu_sync_create(&sync);
+	r = amdgpu_sync_resv(p->adev, &sync, resv, sync_mode, p->vm);
+	if (!r)
+		r = amdgpu_sync_push_to_job(&sync, p->job);
+	amdgpu_sync_free(&sync);
+	return r;
 }
 
 /**
@@ -225,7 +231,7 @@ static int amdgpu_vm_sdma_update(struct amdgpu_vm_update_params *p,
 	/* Wait for PD/PT moves to be completed */
 	dma_resv_iter_begin(&cursor, bo->tbo.base.resv, DMA_RESV_USAGE_KERNEL);
 	dma_resv_for_each_fence_unlocked(&cursor, fence) {
-		r = amdgpu_sync_fence(&p->job->sync, fence);
+		r = drm_sched_job_add_dependency(&p->job->base, fence);
 		if (r) {
 			dma_resv_iter_end(&cursor);
 			return r;
-- 
2.25.1

[PATCH 09/13] drm/amdgpu: use scheduler depenencies for UVD msgs

[Christian König]

Instead of putting that into the job sync object.

Signed-off-by: Christian König <christian.koenig@amd.com>
---
 drivers/gpu/drm/amd/amdgpu/amdgpu_uvd.c | 6 +++---
 1 file changed, 3 insertions(+), 3 deletions(-)

diff --git a/drivers/gpu/drm/amd/amdgpu/amdgpu_uvd.c b/drivers/gpu/drm/amd/amdgpu/amdgpu_uvd.c
index 8baddf79635b..e00bb654e24b 100644
--- a/drivers/gpu/drm/amd/amdgpu/amdgpu_uvd.c
+++ b/drivers/gpu/drm/amd/amdgpu/amdgpu_uvd.c
@@ -1177,9 +1177,9 @@ static int amdgpu_uvd_send_msg(struct amdgpu_ring *ring, struct amdgpu_bo *bo,
 		if (r)
 			goto err_free;
 	} else {
-		r = amdgpu_sync_resv(adev, &job->sync, bo->tbo.base.resv,
-				     AMDGPU_SYNC_ALWAYS,
-				     AMDGPU_FENCE_OWNER_UNDEFINED);
+		r = drm_sched_job_add_resv_dependencies(&job->base,
+							bo->tbo.base.resv,
+							DMA_RESV_USAGE_KERNEL);
 		if (r)
 			goto err_free;
 
-- 
2.25.1

[PATCH 10/13] drm/amdgpu: use scheduler depenencies for CS

[Christian König]

Entirely remove the sync obj in the job.

Signed-off-by: Christian König <christian.koenig@amd.com>
---
 drivers/gpu/drm/amd/amdgpu/amdgpu_cs.c  | 21 ++++++++++-----------
 drivers/gpu/drm/amd/amdgpu/amdgpu_cs.h  |  2 ++
 drivers/gpu/drm/amd/amdgpu/amdgpu_job.c |  9 +--------
 drivers/gpu/drm/amd/amdgpu/amdgpu_job.h |  1 -
 4 files changed, 13 insertions(+), 20 deletions(-)

diff --git a/drivers/gpu/drm/amd/amdgpu/amdgpu_cs.c b/drivers/gpu/drm/amd/amdgpu/amdgpu_cs.c
index d45b86bcf7fa..0528c2b1db6e 100644
--- a/drivers/gpu/drm/amd/amdgpu/amdgpu_cs.c
+++ b/drivers/gpu/drm/amd/amdgpu/amdgpu_cs.c
@@ -426,7 +426,7 @@ static int amdgpu_cs_p2_dependencies(struct amdgpu_cs_parser *p,
 			dma_fence_put(old);
 		}
 
-		r = amdgpu_sync_fence(&p->gang_leader->sync, fence);
+		r = amdgpu_sync_fence(&p->sync, fence);
 		dma_fence_put(fence);
 		if (r)
 			return r;
@@ -448,7 +448,7 @@ static int amdgpu_syncobj_lookup_and_add(struct amdgpu_cs_parser *p,
 		return r;
 	}
 
-	r = amdgpu_sync_fence(&p->gang_leader->sync, fence);
+	r = amdgpu_sync_fence(&p->sync, fence);
 	if (r)
 		goto error;
 
@@ -1108,7 +1108,7 @@ static int amdgpu_cs_vm_handling(struct amdgpu_cs_parser *p)
 	if (r)
 		return r;
 
-	r = amdgpu_sync_fence(&job->sync, fpriv->prt_va->last_pt_update);
+	r = amdgpu_sync_fence(&p->sync, fpriv->prt_va->last_pt_update);
 	if (r)
 		return r;
 
@@ -1119,7 +1119,7 @@ static int amdgpu_cs_vm_handling(struct amdgpu_cs_parser *p)
 		if (r)
 			return r;
 
-		r = amdgpu_sync_fence(&job->sync, bo_va->last_pt_update);
+		r = amdgpu_sync_fence(&p->sync, bo_va->last_pt_update);
 		if (r)
 			return r;
 	}
@@ -1138,7 +1138,7 @@ static int amdgpu_cs_vm_handling(struct amdgpu_cs_parser *p)
 		if (r)
 			return r;
 
-		r = amdgpu_sync_fence(&job->sync, bo_va->last_pt_update);
+		r = amdgpu_sync_fence(&p->sync, bo_va->last_pt_update);
 		if (r)
 			return r;
 	}
@@ -1151,7 +1151,7 @@ static int amdgpu_cs_vm_handling(struct amdgpu_cs_parser *p)
 	if (r)
 		return r;
 
-	r = amdgpu_sync_fence(&job->sync, vm->last_update);
+	r = amdgpu_sync_fence(&p->sync, vm->last_update);
 	if (r)
 		return r;
 
@@ -1183,7 +1183,6 @@ static int amdgpu_cs_vm_handling(struct amdgpu_cs_parser *p)
 static int amdgpu_cs_sync_rings(struct amdgpu_cs_parser *p)
 {
 	struct amdgpu_fpriv *fpriv = p->filp->driver_priv;
-	struct amdgpu_job *leader = p->gang_leader;
 	struct amdgpu_bo_list_entry *e;
 	unsigned int i;
 	int r;
@@ -1195,14 +1194,14 @@ static int amdgpu_cs_sync_rings(struct amdgpu_cs_parser *p)
 
 		sync_mode = amdgpu_bo_explicit_sync(bo) ?
 			AMDGPU_SYNC_EXPLICIT : AMDGPU_SYNC_NE_OWNER;
-		r = amdgpu_sync_resv(p->adev, &leader->sync, resv, sync_mode,
+		r = amdgpu_sync_resv(p->adev, &p->sync, resv, sync_mode,
 				     &fpriv->vm);
 		if (r)
 			return r;
 	}
 
-	for (i = 0; i < p->gang_size - 1; ++i) {
-		r = amdgpu_sync_clone(&leader->sync, &p->jobs[i]->sync);
+	for (i = 0; i < p->gang_size; ++i) {
+		r = amdgpu_sync_push_to_job(&p->sync, p->jobs[i]);
 		if (r)
 			return r;
 	}
@@ -1248,7 +1247,7 @@ static int amdgpu_cs_submit(struct amdgpu_cs_parser *p,
 		struct dma_fence *fence;
 
 		fence = &p->jobs[i]->base.s_fence->scheduled;
-		r = amdgpu_sync_fence(&leader->sync, fence);
+		r = drm_sched_job_add_dependency(&leader->base, fence);
 		if (r)
 			goto error_cleanup;
 	}
diff --git a/drivers/gpu/drm/amd/amdgpu/amdgpu_cs.h b/drivers/gpu/drm/amd/amdgpu/amdgpu_cs.h
index cbaa19b2b8a3..207e801c24ed 100644
--- a/drivers/gpu/drm/amd/amdgpu/amdgpu_cs.h
+++ b/drivers/gpu/drm/amd/amdgpu/amdgpu_cs.h
@@ -75,6 +75,8 @@ struct amdgpu_cs_parser {
 
 	unsigned			num_post_deps;
 	struct amdgpu_cs_post_dep	*post_deps;
+
+	struct amdgpu_sync		sync;
 };
 
 int amdgpu_cs_find_mapping(struct amdgpu_cs_parser *parser,
diff --git a/drivers/gpu/drm/amd/amdgpu/amdgpu_job.c b/drivers/gpu/drm/amd/amdgpu/amdgpu_job.c
index 139b9526072a..98e05f16cd55 100644
--- a/drivers/gpu/drm/amd/amdgpu/amdgpu_job.c
+++ b/drivers/gpu/drm/amd/amdgpu/amdgpu_job.c
@@ -107,7 +107,6 @@ int amdgpu_job_alloc(struct amdgpu_device *adev, struct amdgpu_vm *vm,
 	(*job)->base.sched = &adev->rings[0]->sched;
 	(*job)->vm = vm;
 
-	amdgpu_sync_create(&(*job)->sync);
 	amdgpu_sync_create(&(*job)->explicit_sync);
 	(*job)->vram_lost_counter = atomic_read(&adev->vram_lost_counter);
 	(*job)->vm_pd_addr = AMDGPU_BO_INVALID_OFFSET;
@@ -175,9 +174,7 @@ static void amdgpu_job_free_cb(struct drm_sched_job *s_job)
 
 	drm_sched_job_cleanup(s_job);
 
-	amdgpu_sync_free(&job->sync);
 	amdgpu_sync_free(&job->explicit_sync);
-
 	dma_fence_put(&job->hw_fence);
 }
 
@@ -203,7 +200,6 @@ void amdgpu_job_free(struct amdgpu_job *job)
 		drm_sched_job_cleanup(&job->base);
 
 	amdgpu_job_free_resources(job);
-	amdgpu_sync_free(&job->sync);
 	amdgpu_sync_free(&job->explicit_sync);
 	if (job->gang_submit != &job->base.s_fence->scheduled)
 		dma_fence_put(job->gang_submit);
@@ -247,10 +243,9 @@ amdgpu_job_dependency(struct drm_sched_job *sched_job,
 {
 	struct amdgpu_ring *ring = to_amdgpu_ring(s_entity->rq->sched);
 	struct amdgpu_job *job = to_amdgpu_job(sched_job);
-	struct dma_fence *fence;
+	struct dma_fence *fence = NULL;
 	int r;
 
-	fence = amdgpu_sync_get_fence(&job->sync);
 	while (fence == NULL && job->vm && !job->vmid) {
 		r = amdgpu_vmid_grab(job->vm, ring, job, &fence);
 		if (r)
@@ -274,8 +269,6 @@ static struct dma_fence *amdgpu_job_run(struct drm_sched_job *sched_job)
 	job = to_amdgpu_job(sched_job);
 	finished = &job->base.s_fence->finished;
 
-	BUG_ON(amdgpu_sync_peek_fence(&job->sync, NULL));
-
 	trace_amdgpu_sched_run_job(job);
 
 	/* Skip job if VRAM is lost and never resubmit gangs */
diff --git a/drivers/gpu/drm/amd/amdgpu/amdgpu_job.h b/drivers/gpu/drm/amd/amdgpu/amdgpu_job.h
index 9c10b9bd0084..6558839fda03 100644
--- a/drivers/gpu/drm/amd/amdgpu/amdgpu_job.h
+++ b/drivers/gpu/drm/amd/amdgpu/amdgpu_job.h
@@ -47,7 +47,6 @@ enum amdgpu_ib_pool_type;
 struct amdgpu_job {
 	struct drm_sched_job    base;
 	struct amdgpu_vm	*vm;
-	struct amdgpu_sync	sync;
 	struct amdgpu_sync	explicit_sync;
 	struct dma_fence	hw_fence;
 	struct dma_fence	*gang_submit;
-- 
2.25.1

[PATCH 11/13] drm/scheduler: remove drm_sched_dependency_optimized

[Christian König]

Not used any more.

Signed-off-by: Christian König <christian.koenig@amd.com>
---
 drivers/gpu/drm/scheduler/sched_main.c | 26 --------------------------
 include/drm/gpu_scheduler.h            |  2 --
 2 files changed, 28 deletions(-)

diff --git a/drivers/gpu/drm/scheduler/sched_main.c b/drivers/gpu/drm/scheduler/sched_main.c
index 6e2cd0f906b2..ae4aac6eb26e 100644
--- a/drivers/gpu/drm/scheduler/sched_main.c
+++ b/drivers/gpu/drm/scheduler/sched_main.c
@@ -197,32 +197,6 @@ static void drm_sched_job_done_cb(struct dma_fence *f, struct dma_fence_cb *cb)
 	drm_sched_job_done(s_job);
 }
 
-/**
- * drm_sched_dependency_optimized
- *
- * @fence: the dependency fence
- * @entity: the entity which depends on the above fence
- *
- * Returns true if the dependency can be optimized and false otherwise
- */
-bool drm_sched_dependency_optimized(struct dma_fence* fence,
-				    struct drm_sched_entity *entity)
-{
-	struct drm_gpu_scheduler *sched = entity->rq->sched;
-	struct drm_sched_fence *s_fence;
-
-	if (!fence || dma_fence_is_signaled(fence))
-		return false;
-	if (fence->context == entity->fence_context)
-		return true;
-	s_fence = to_drm_sched_fence(fence);
-	if (s_fence && s_fence->sched == sched)
-		return true;
-
-	return false;
-}
-EXPORT_SYMBOL(drm_sched_dependency_optimized);
-
 /**
  * drm_sched_start_timeout - start timeout for reset worker
  *
diff --git a/include/drm/gpu_scheduler.h b/include/drm/gpu_scheduler.h
index 3315e5be7791..5f51eef2a835 100644
--- a/include/drm/gpu_scheduler.h
+++ b/include/drm/gpu_scheduler.h
@@ -497,8 +497,6 @@ void drm_sched_resubmit_jobs_ext(struct drm_gpu_scheduler *sched, int max);
 void drm_sched_increase_karma(struct drm_sched_job *bad);
 void drm_sched_reset_karma(struct drm_sched_job *bad);
 void drm_sched_increase_karma_ext(struct drm_sched_job *bad, int type);
-bool drm_sched_dependency_optimized(struct dma_fence* fence,
-				    struct drm_sched_entity *entity);
 void drm_sched_fault(struct drm_gpu_scheduler *sched);
 void drm_sched_job_kickout(struct drm_sched_job *s_job);
 
-- 
2.25.1

[PATCH 12/13] drm/scheduler: rework entity flush, kill and fini

[Christian König]

This was buggy because when we had to wait for entities which were
killed as well we would just deadlock.

Instead move all the dependency handling into the callbacks so that
will all happen asynchronously.

Signed-off-by: Christian König <christian.koenig@amd.com>
---
 drivers/gpu/drm/scheduler/sched_entity.c | 197 +++++++++++------------
 1 file changed, 92 insertions(+), 105 deletions(-)

diff --git a/drivers/gpu/drm/scheduler/sched_entity.c b/drivers/gpu/drm/scheduler/sched_entity.c
index 1bb1437a8fed..1d448e376811 100644
--- a/drivers/gpu/drm/scheduler/sched_entity.c
+++ b/drivers/gpu/drm/scheduler/sched_entity.c
@@ -139,6 +139,74 @@ bool drm_sched_entity_is_ready(struct drm_sched_entity *entity)
 	return true;
 }
 
+static void drm_sched_entity_kill_jobs_irq_work(struct irq_work *wrk)
+{
+	struct drm_sched_job *job = container_of(wrk, typeof(*job), work);
+
+	drm_sched_fence_scheduled(job->s_fence);
+	drm_sched_fence_finished(job->s_fence);
+	WARN_ON(job->s_fence->parent);
+	job->sched->ops->free_job(job);
+}
+
+/* Signal the scheduler finished fence when the entity in question is killed. */
+static void drm_sched_entity_kill_jobs_cb(struct dma_fence *f,
+					  struct dma_fence_cb *cb)
+{
+	struct drm_sched_job *job = container_of(cb, struct drm_sched_job,
+						 finish_cb);
+	int r;
+
+	dma_fence_put(f);
+
+	/* Wait for all dependencies to avoid data corruptions */
+	while (!xa_empty(&job->dependencies)) {
+		f = xa_erase(&job->dependencies, job->last_dependency++);
+		r = dma_fence_add_callback(f, &job->finish_cb,
+					   drm_sched_entity_kill_jobs_cb);
+		if (!r)
+			return;
+
+		dma_fence_put(f);
+	}
+
+	init_irq_work(&job->work, drm_sched_entity_kill_jobs_irq_work);
+	irq_work_queue(&job->work);
+}
+
+/* Remove the entity from the scheduler and kill all pending jobs */
+static void drm_sched_entity_kill(struct drm_sched_entity *entity)
+{
+	struct drm_sched_job *job;
+	struct dma_fence *prev;
+
+	if (!entity->rq)
+		return;
+
+	spin_lock(&entity->rq_lock);
+	entity->stopped = true;
+	drm_sched_rq_remove_entity(entity->rq, entity);
+	spin_unlock(&entity->rq_lock);
+
+	/* Make sure this entity is not used by the scheduler at the moment */
+	wait_for_completion(&entity->entity_idle);
+
+	prev = dma_fence_get(entity->last_scheduled);
+	while ((job = to_drm_sched_job(spsc_queue_pop(&entity->job_queue)))) {
+		struct drm_sched_fence *s_fence = job->s_fence;
+
+		dma_fence_set_error(&s_fence->finished, -ESRCH);
+
+		dma_fence_get(&s_fence->finished);
+		if (!prev || dma_fence_add_callback(prev, &job->finish_cb,
+					   drm_sched_entity_kill_jobs_cb))
+			drm_sched_entity_kill_jobs_cb(NULL, &job->finish_cb);
+
+		prev = &s_fence->finished;
+	}
+	dma_fence_put(prev);
+}
+
 /**
  * drm_sched_entity_flush - Flush a context entity
  *
@@ -179,91 +247,13 @@ long drm_sched_entity_flush(struct drm_sched_entity *entity, long timeout)
 	/* For killed process disable any more IBs enqueue right now */
 	last_user = cmpxchg(&entity->last_user, current->group_leader, NULL);
 	if ((!last_user || last_user == current->group_leader) &&
-	    (current->flags & PF_EXITING) && (current->exit_code == SIGKILL)) {
-		spin_lock(&entity->rq_lock);
-		entity->stopped = true;
-		drm_sched_rq_remove_entity(entity->rq, entity);
-		spin_unlock(&entity->rq_lock);
-	}
+	    (current->flags & PF_EXITING) && (current->exit_code == SIGKILL))
+		drm_sched_entity_kill(entity);
 
 	return ret;
 }
 EXPORT_SYMBOL(drm_sched_entity_flush);
 
-static void drm_sched_entity_kill_jobs_irq_work(struct irq_work *wrk)
-{
-	struct drm_sched_job *job = container_of(wrk, typeof(*job), work);
-
-	drm_sched_fence_finished(job->s_fence);
-	WARN_ON(job->s_fence->parent);
-	job->sched->ops->free_job(job);
-}
-
-
-/* Signal the scheduler finished fence when the entity in question is killed. */
-static void drm_sched_entity_kill_jobs_cb(struct dma_fence *f,
-					  struct dma_fence_cb *cb)
-{
-	struct drm_sched_job *job = container_of(cb, struct drm_sched_job,
-						 finish_cb);
-
-	dma_fence_put(f);
-	init_irq_work(&job->work, drm_sched_entity_kill_jobs_irq_work);
-	irq_work_queue(&job->work);
-}
-
-static struct dma_fence *
-drm_sched_job_dependency(struct drm_sched_job *job,
-			 struct drm_sched_entity *entity)
-{
-	if (!xa_empty(&job->dependencies))
-		return xa_erase(&job->dependencies, job->last_dependency++);
-
-	if (job->sched->ops->dependency)
-		return job->sched->ops->dependency(job, entity);
-
-	return NULL;
-}
-
-static void drm_sched_entity_kill_jobs(struct drm_sched_entity *entity)
-{
-	struct drm_sched_job *job;
-	struct dma_fence *f;
-	int r;
-
-	while ((job = to_drm_sched_job(spsc_queue_pop(&entity->job_queue)))) {
-		struct drm_sched_fence *s_fence = job->s_fence;
-
-		/* Wait for all dependencies to avoid data corruptions */
-		while ((f = drm_sched_job_dependency(job, entity))) {
-			dma_fence_wait(f, false);
-			dma_fence_put(f);
-		}
-
-		drm_sched_fence_scheduled(s_fence);
-		dma_fence_set_error(&s_fence->finished, -ESRCH);
-
-		/*
-		 * When pipe is hanged by older entity, new entity might
-		 * not even have chance to submit it's first job to HW
-		 * and so entity->last_scheduled will remain NULL
-		 */
-		if (!entity->last_scheduled) {
-			drm_sched_entity_kill_jobs_cb(NULL, &job->finish_cb);
-			continue;
-		}
-
-		dma_fence_get(entity->last_scheduled);
-		r = dma_fence_add_callback(entity->last_scheduled,
-					   &job->finish_cb,
-					   drm_sched_entity_kill_jobs_cb);
-		if (r == -ENOENT)
-			drm_sched_entity_kill_jobs_cb(NULL, &job->finish_cb);
-		else if (r)
-			DRM_ERROR("fence add callback failed (%d)\n", r);
-	}
-}
-
 /**
  * drm_sched_entity_fini - Destroy a context entity
  *
@@ -277,33 +267,17 @@ static void drm_sched_entity_kill_jobs(struct drm_sched_entity *entity)
  */
 void drm_sched_entity_fini(struct drm_sched_entity *entity)
 {
-	struct drm_gpu_scheduler *sched = NULL;
-
-	if (entity->rq) {
-		sched = entity->rq->sched;
-		drm_sched_rq_remove_entity(entity->rq, entity);
-	}
-
-	/* Consumption of existing IBs wasn't completed. Forcefully
-	 * remove them here.
+	/*
+	 * If consumption of existing IBs wasn't completed. Forcefully remove
+	 * them here. Also makes sure that the scheduler won't touch this entity
+	 * any more.
 	 */
-	if (spsc_queue_count(&entity->job_queue)) {
-		if (sched) {
-			/*
-			 * Wait for thread to idle to make sure it isn't processing
-			 * this entity.
-			 */
-			wait_for_completion(&entity->entity_idle);
-
-		}
-		if (entity->dependency) {
-			dma_fence_remove_callback(entity->dependency,
-						  &entity->cb);
-			dma_fence_put(entity->dependency);
-			entity->dependency = NULL;
-		}
+	drm_sched_entity_kill(entity);
 
-		drm_sched_entity_kill_jobs(entity);
+	if (entity->dependency) {
+		dma_fence_remove_callback(entity->dependency, &entity->cb);
+		dma_fence_put(entity->dependency);
+		entity->dependency = NULL;
 	}
 
 	dma_fence_put(entity->last_scheduled);
@@ -415,6 +389,19 @@ static bool drm_sched_entity_add_dependency_cb(struct drm_sched_entity *entity)
 	return false;
 }
 
+static struct dma_fence *
+drm_sched_job_dependency(struct drm_sched_job *job,
+			 struct drm_sched_entity *entity)
+{
+	if (!xa_empty(&job->dependencies))
+		return xa_erase(&job->dependencies, job->last_dependency++);
+
+	if (job->sched->ops->dependency)
+		return job->sched->ops->dependency(job, entity);
+
+	return NULL;
+}
+
 struct drm_sched_job *drm_sched_entity_pop_job(struct drm_sched_entity *entity)
 {
 	struct drm_sched_job *sched_job;
-- 
2.25.1

Re: [PATCH 12/13] drm/scheduler: rework entity flush, kill and fini

[Andrey Grodzovsky]

On 2022-09-29 09:21, Christian König wrote:
> This was buggy because when we had to wait for entities which were
> killed as well we would just deadlock.
>
> Instead move all the dependency handling into the callbacks so that
> will all happen asynchronously.
>
> Signed-off-by: Christian König <christian.koenig@amd.com>
> ---
>   drivers/gpu/drm/scheduler/sched_entity.c | 197 +++++++++++------------
>   1 file changed, 92 insertions(+), 105 deletions(-)
>
> diff --git a/drivers/gpu/drm/scheduler/sched_entity.c b/drivers/gpu/drm/scheduler/sched_entity.c
> index 1bb1437a8fed..1d448e376811 100644
> --- a/drivers/gpu/drm/scheduler/sched_entity.c
> +++ b/drivers/gpu/drm/scheduler/sched_entity.c
> @@ -139,6 +139,74 @@ bool drm_sched_entity_is_ready(struct drm_sched_entity *entity)
>   	return true;
>   }
>   
> +static void drm_sched_entity_kill_jobs_irq_work(struct irq_work *wrk)
> +{
> +	struct drm_sched_job *job = container_of(wrk, typeof(*job), work);
> +
> +	drm_sched_fence_scheduled(job->s_fence);
> +	drm_sched_fence_finished(job->s_fence);
> +	WARN_ON(job->s_fence->parent);
> +	job->sched->ops->free_job(job);
> +}
> +
> +/* Signal the scheduler finished fence when the entity in question is killed. */
> +static void drm_sched_entity_kill_jobs_cb(struct dma_fence *f,
> +					  struct dma_fence_cb *cb)
> +{
> +	struct drm_sched_job *job = container_of(cb, struct drm_sched_job,
> +						 finish_cb);
> +	int r;
> +
> +	dma_fence_put(f);
> +
> +	/* Wait for all dependencies to avoid data corruptions */
> +	while (!xa_empty(&job->dependencies)) {
> +		f = xa_erase(&job->dependencies, job->last_dependency++);
> +		r = dma_fence_add_callback(f, &job->finish_cb,
> +					   drm_sched_entity_kill_jobs_cb);
> +		if (!r)
> +			return;
> +
> +		dma_fence_put(f);
> +	}
> +
> +	init_irq_work(&job->work, drm_sched_entity_kill_jobs_irq_work);
> +	irq_work_queue(&job->work);
> +}
> +
> +/* Remove the entity from the scheduler and kill all pending jobs */
> +static void drm_sched_entity_kill(struct drm_sched_entity *entity)
> +{
> +	struct drm_sched_job *job;
> +	struct dma_fence *prev;
> +
> +	if (!entity->rq)
> +		return;
> +
> +	spin_lock(&entity->rq_lock);
> +	entity->stopped = true;
> +	drm_sched_rq_remove_entity(entity->rq, entity);
> +	spin_unlock(&entity->rq_lock);
> +
> +	/* Make sure this entity is not used by the scheduler at the moment */
> +	wait_for_completion(&entity->entity_idle);


Does it really stop processing in case more jobs are pending in entity 
queue already ?
It probably makes sense to integrate drm_sched_entity_is_idle into 
drm_sched_entity_is_ready
to prevent rq selecting this  entity  in such case

> +
> +	prev = dma_fence_get(entity->last_scheduled);
> +	while ((job = to_drm_sched_job(spsc_queue_pop(&entity->job_queue)))) {
> +		struct drm_sched_fence *s_fence = job->s_fence;
> +
> +		dma_fence_set_error(&s_fence->finished, -ESRCH);
> +
> +		dma_fence_get(&s_fence->finished);
> +		if (!prev || dma_fence_add_callback(prev, &job->finish_cb,
> +					   drm_sched_entity_kill_jobs_cb))
> +			drm_sched_entity_kill_jobs_cb(NULL, &job->finish_cb);
> +
> +		prev = &s_fence->finished;
> +	}
> +	dma_fence_put(prev);
> +}
> +
>   /**
>    * drm_sched_entity_flush - Flush a context entity
>    *
> @@ -179,91 +247,13 @@ long drm_sched_entity_flush(struct drm_sched_entity *entity, long timeout)
>   	/* For killed process disable any more IBs enqueue right now */
>   	last_user = cmpxchg(&entity->last_user, current->group_leader, NULL);
>   	if ((!last_user || last_user == current->group_leader) &&
> -	    (current->flags & PF_EXITING) && (current->exit_code == SIGKILL)) {
> -		spin_lock(&entity->rq_lock);
> -		entity->stopped = true;
> -		drm_sched_rq_remove_entity(entity->rq, entity);
> -		spin_unlock(&entity->rq_lock);
> -	}
> +	    (current->flags & PF_EXITING) && (current->exit_code == SIGKILL))
> +		drm_sched_entity_kill(entity);


This reverts 'drm/scheduler: only kill entity if last user is killed v2' 
and so might break this use case - when entity
gets through FD into child process. Why this needs to be removed ?

Andrey


>   
>   	return ret;
>   }
>   EXPORT_SYMBOL(drm_sched_entity_flush);
>   
> -static void drm_sched_entity_kill_jobs_irq_work(struct irq_work *wrk)
> -{
> -	struct drm_sched_job *job = container_of(wrk, typeof(*job), work);
> -
> -	drm_sched_fence_finished(job->s_fence);
> -	WARN_ON(job->s_fence->parent);
> -	job->sched->ops->free_job(job);
> -}
> -
> -
> -/* Signal the scheduler finished fence when the entity in question is killed. */
> -static void drm_sched_entity_kill_jobs_cb(struct dma_fence *f,
> -					  struct dma_fence_cb *cb)
> -{
> -	struct drm_sched_job *job = container_of(cb, struct drm_sched_job,
> -						 finish_cb);
> -
> -	dma_fence_put(f);
> -	init_irq_work(&job->work, drm_sched_entity_kill_jobs_irq_work);
> -	irq_work_queue(&job->work);
> -}
> -
> -static struct dma_fence *
> -drm_sched_job_dependency(struct drm_sched_job *job,
> -			 struct drm_sched_entity *entity)
> -{
> -	if (!xa_empty(&job->dependencies))
> -		return xa_erase(&job->dependencies, job->last_dependency++);
> -
> -	if (job->sched->ops->dependency)
> -		return job->sched->ops->dependency(job, entity);
> -
> -	return NULL;
> -}
> -
> -static void drm_sched_entity_kill_jobs(struct drm_sched_entity *entity)
> -{
> -	struct drm_sched_job *job;
> -	struct dma_fence *f;
> -	int r;
> -
> -	while ((job = to_drm_sched_job(spsc_queue_pop(&entity->job_queue)))) {
> -		struct drm_sched_fence *s_fence = job->s_fence;
> -
> -		/* Wait for all dependencies to avoid data corruptions */
> -		while ((f = drm_sched_job_dependency(job, entity))) {
> -			dma_fence_wait(f, false);
> -			dma_fence_put(f);
> -		}
> -
> -		drm_sched_fence_scheduled(s_fence);
> -		dma_fence_set_error(&s_fence->finished, -ESRCH);
> -
> -		/*
> -		 * When pipe is hanged by older entity, new entity might
> -		 * not even have chance to submit it's first job to HW
> -		 * and so entity->last_scheduled will remain NULL
> -		 */
> -		if (!entity->last_scheduled) {
> -			drm_sched_entity_kill_jobs_cb(NULL, &job->finish_cb);
> -			continue;
> -		}
> -
> -		dma_fence_get(entity->last_scheduled);
> -		r = dma_fence_add_callback(entity->last_scheduled,
> -					   &job->finish_cb,
> -					   drm_sched_entity_kill_jobs_cb);
> -		if (r == -ENOENT)
> -			drm_sched_entity_kill_jobs_cb(NULL, &job->finish_cb);
> -		else if (r)
> -			DRM_ERROR("fence add callback failed (%d)\n", r);
> -	}
> -}
> -
>   /**
>    * drm_sched_entity_fini - Destroy a context entity
>    *
> @@ -277,33 +267,17 @@ static void drm_sched_entity_kill_jobs(struct drm_sched_entity *entity)
>    */
>   void drm_sched_entity_fini(struct drm_sched_entity *entity)
>   {
> -	struct drm_gpu_scheduler *sched = NULL;
> -
> -	if (entity->rq) {
> -		sched = entity->rq->sched;
> -		drm_sched_rq_remove_entity(entity->rq, entity);
> -	}
> -
> -	/* Consumption of existing IBs wasn't completed. Forcefully
> -	 * remove them here.
> +	/*
> +	 * If consumption of existing IBs wasn't completed. Forcefully remove
> +	 * them here. Also makes sure that the scheduler won't touch this entity
> +	 * any more.
>   	 */
> -	if (spsc_queue_count(&entity->job_queue)) {
> -		if (sched) {
> -			/*
> -			 * Wait for thread to idle to make sure it isn't processing
> -			 * this entity.
> -			 */
> -			wait_for_completion(&entity->entity_idle);
> -
> -		}
> -		if (entity->dependency) {
> -			dma_fence_remove_callback(entity->dependency,
> -						  &entity->cb);
> -			dma_fence_put(entity->dependency);
> -			entity->dependency = NULL;
> -		}
> +	drm_sched_entity_kill(entity);
>   
> -		drm_sched_entity_kill_jobs(entity);
> +	if (entity->dependency) {
> +		dma_fence_remove_callback(entity->dependency, &entity->cb);
> +		dma_fence_put(entity->dependency);
> +		entity->dependency = NULL;
>   	}
>   
>   	dma_fence_put(entity->last_scheduled);
> @@ -415,6 +389,19 @@ static bool drm_sched_entity_add_dependency_cb(struct drm_sched_entity *entity)
>   	return false;
>   }
>   
> +static struct dma_fence *
> +drm_sched_job_dependency(struct drm_sched_job *job,
> +			 struct drm_sched_entity *entity)
> +{
> +	if (!xa_empty(&job->dependencies))
> +		return xa_erase(&job->dependencies, job->last_dependency++);
> +
> +	if (job->sched->ops->dependency)
> +		return job->sched->ops->dependency(job, entity);
> +
> +	return NULL;
> +}
> +
>   struct drm_sched_job *drm_sched_entity_pop_job(struct drm_sched_entity *entity)
>   {
>   	struct drm_sched_job *sched_job;

Re: [PATCH 12/13] drm/scheduler: rework entity flush, kill and fini

[Christian König]

Am 29.09.22 um 21:20 schrieb Andrey Grodzovsky:
>
> On 2022-09-29 09:21, Christian König wrote:
>> This was buggy because when we had to wait for entities which were
>> killed as well we would just deadlock.
>>
>> Instead move all the dependency handling into the callbacks so that
>> will all happen asynchronously.
>>
>> Signed-off-by: Christian König <christian.koenig@amd.com>
>> ---
>>   drivers/gpu/drm/scheduler/sched_entity.c | 197 +++++++++++------------
>>   1 file changed, 92 insertions(+), 105 deletions(-)
>>
>> diff --git a/drivers/gpu/drm/scheduler/sched_entity.c 
>> b/drivers/gpu/drm/scheduler/sched_entity.c
>> index 1bb1437a8fed..1d448e376811 100644
>> --- a/drivers/gpu/drm/scheduler/sched_entity.c
>> +++ b/drivers/gpu/drm/scheduler/sched_entity.c
>> @@ -139,6 +139,74 @@ bool drm_sched_entity_is_ready(struct 
>> drm_sched_entity *entity)
>>       return true;
>>   }
>>   +static void drm_sched_entity_kill_jobs_irq_work(struct irq_work *wrk)
>> +{
>> +    struct drm_sched_job *job = container_of(wrk, typeof(*job), work);
>> +
>> +    drm_sched_fence_scheduled(job->s_fence);
>> +    drm_sched_fence_finished(job->s_fence);
>> +    WARN_ON(job->s_fence->parent);
>> +    job->sched->ops->free_job(job);
>> +}
>> +
>> +/* Signal the scheduler finished fence when the entity in question 
>> is killed. */
>> +static void drm_sched_entity_kill_jobs_cb(struct dma_fence *f,
>> +                      struct dma_fence_cb *cb)
>> +{
>> +    struct drm_sched_job *job = container_of(cb, struct drm_sched_job,
>> +                         finish_cb);
>> +    int r;
>> +
>> +    dma_fence_put(f);
>> +
>> +    /* Wait for all dependencies to avoid data corruptions */
>> +    while (!xa_empty(&job->dependencies)) {
>> +        f = xa_erase(&job->dependencies, job->last_dependency++);
>> +        r = dma_fence_add_callback(f, &job->finish_cb,
>> +                       drm_sched_entity_kill_jobs_cb);
>> +        if (!r)
>> +            return;
>> +
>> +        dma_fence_put(f);
>> +    }
>> +
>> +    init_irq_work(&job->work, drm_sched_entity_kill_jobs_irq_work);
>> +    irq_work_queue(&job->work);
>> +}
>> +
>> +/* Remove the entity from the scheduler and kill all pending jobs */
>> +static void drm_sched_entity_kill(struct drm_sched_entity *entity)
>> +{
>> +    struct drm_sched_job *job;
>> +    struct dma_fence *prev;
>> +
>> +    if (!entity->rq)
>> +        return;
>> +
>> +    spin_lock(&entity->rq_lock);
>> +    entity->stopped = true;
>> +    drm_sched_rq_remove_entity(entity->rq, entity);
>> +    spin_unlock(&entity->rq_lock);
>> +
>> +    /* Make sure this entity is not used by the scheduler at the 
>> moment */
>> +    wait_for_completion(&entity->entity_idle);
>
>
> Does it really stop processing in case more jobs are pending in entity 
> queue already ?
> It probably makes sense to integrate drm_sched_entity_is_idle into 
> drm_sched_entity_is_ready
> to prevent rq selecting this  entity  in such case

We make sure that the entity is not used for scheduling any more by 
calling drm_sched_rq_remove_entity() right above this check here.

The wait is only to prevent us from racing with the scheduler thread 
submitting one more job from the entity.

>
>> +
>> +    prev = dma_fence_get(entity->last_scheduled);
>> +    while ((job = 
>> to_drm_sched_job(spsc_queue_pop(&entity->job_queue)))) {
>> +        struct drm_sched_fence *s_fence = job->s_fence;
>> +
>> +        dma_fence_set_error(&s_fence->finished, -ESRCH);
>> +
>> +        dma_fence_get(&s_fence->finished);
>> +        if (!prev || dma_fence_add_callback(prev, &job->finish_cb,
>> +                       drm_sched_entity_kill_jobs_cb))
>> +            drm_sched_entity_kill_jobs_cb(NULL, &job->finish_cb);
>> +
>> +        prev = &s_fence->finished;
>> +    }
>> +    dma_fence_put(prev);
>> +}
>> +
>>   /**
>>    * drm_sched_entity_flush - Flush a context entity
>>    *
>> @@ -179,91 +247,13 @@ long drm_sched_entity_flush(struct 
>> drm_sched_entity *entity, long timeout)
>>       /* For killed process disable any more IBs enqueue right now */
>>       last_user = cmpxchg(&entity->last_user, current->group_leader, 
>> NULL);
>>       if ((!last_user || last_user == current->group_leader) &&
>> -        (current->flags & PF_EXITING) && (current->exit_code == 
>> SIGKILL)) {
>> -        spin_lock(&entity->rq_lock);
>> -        entity->stopped = true;
>> -        drm_sched_rq_remove_entity(entity->rq, entity);
>> -        spin_unlock(&entity->rq_lock);
>> -    }
>> +        (current->flags & PF_EXITING) && (current->exit_code == 
>> SIGKILL))
>> +        drm_sched_entity_kill(entity);
>
>
> This reverts 'drm/scheduler: only kill entity if last user is killed 
> v2' and so might break this use case - when entity
> gets through FD into child process. Why this needs to be removed ?

This patch isn't reverted. I keep the "last_user == 
current->group_leader" check in the line above.

Christian.

>
> Andrey
>
>
>>         return ret;
>>   }
>>   EXPORT_SYMBOL(drm_sched_entity_flush);
>>   -static void drm_sched_entity_kill_jobs_irq_work(struct irq_work *wrk)
>> -{
>> -    struct drm_sched_job *job = container_of(wrk, typeof(*job), work);
>> -
>> -    drm_sched_fence_finished(job->s_fence);
>> -    WARN_ON(job->s_fence->parent);
>> -    job->sched->ops->free_job(job);
>> -}
>> -
>> -
>> -/* Signal the scheduler finished fence when the entity in question 
>> is killed. */
>> -static void drm_sched_entity_kill_jobs_cb(struct dma_fence *f,
>> -                      struct dma_fence_cb *cb)
>> -{
>> -    struct drm_sched_job *job = container_of(cb, struct drm_sched_job,
>> -                         finish_cb);
>> -
>> -    dma_fence_put(f);
>> -    init_irq_work(&job->work, drm_sched_entity_kill_jobs_irq_work);
>> -    irq_work_queue(&job->work);
>> -}
>> -
>> -static struct dma_fence *
>> -drm_sched_job_dependency(struct drm_sched_job *job,
>> -             struct drm_sched_entity *entity)
>> -{
>> -    if (!xa_empty(&job->dependencies))
>> -        return xa_erase(&job->dependencies, job->last_dependency++);
>> -
>> -    if (job->sched->ops->dependency)
>> -        return job->sched->ops->dependency(job, entity);
>> -
>> -    return NULL;
>> -}
>> -
>> -static void drm_sched_entity_kill_jobs(struct drm_sched_entity *entity)
>> -{
>> -    struct drm_sched_job *job;
>> -    struct dma_fence *f;
>> -    int r;
>> -
>> -    while ((job = 
>> to_drm_sched_job(spsc_queue_pop(&entity->job_queue)))) {
>> -        struct drm_sched_fence *s_fence = job->s_fence;
>> -
>> -        /* Wait for all dependencies to avoid data corruptions */
>> -        while ((f = drm_sched_job_dependency(job, entity))) {
>> -            dma_fence_wait(f, false);
>> -            dma_fence_put(f);
>> -        }
>> -
>> -        drm_sched_fence_scheduled(s_fence);
>> -        dma_fence_set_error(&s_fence->finished, -ESRCH);
>> -
>> -        /*
>> -         * When pipe is hanged by older entity, new entity might
>> -         * not even have chance to submit it's first job to HW
>> -         * and so entity->last_scheduled will remain NULL
>> -         */
>> -        if (!entity->last_scheduled) {
>> -            drm_sched_entity_kill_jobs_cb(NULL, &job->finish_cb);
>> -            continue;
>> -        }
>> -
>> -        dma_fence_get(entity->last_scheduled);
>> -        r = dma_fence_add_callback(entity->last_scheduled,
>> -                       &job->finish_cb,
>> -                       drm_sched_entity_kill_jobs_cb);
>> -        if (r == -ENOENT)
>> -            drm_sched_entity_kill_jobs_cb(NULL, &job->finish_cb);
>> -        else if (r)
>> -            DRM_ERROR("fence add callback failed (%d)\n", r);
>> -    }
>> -}
>> -
>>   /**
>>    * drm_sched_entity_fini - Destroy a context entity
>>    *
>> @@ -277,33 +267,17 @@ static void drm_sched_entity_kill_jobs(struct 
>> drm_sched_entity *entity)
>>    */
>>   void drm_sched_entity_fini(struct drm_sched_entity *entity)
>>   {
>> -    struct drm_gpu_scheduler *sched = NULL;
>> -
>> -    if (entity->rq) {
>> -        sched = entity->rq->sched;
>> -        drm_sched_rq_remove_entity(entity->rq, entity);
>> -    }
>> -
>> -    /* Consumption of existing IBs wasn't completed. Forcefully
>> -     * remove them here.
>> +    /*
>> +     * If consumption of existing IBs wasn't completed. Forcefully 
>> remove
>> +     * them here. Also makes sure that the scheduler won't touch 
>> this entity
>> +     * any more.
>>        */
>> -    if (spsc_queue_count(&entity->job_queue)) {
>> -        if (sched) {
>> -            /*
>> -             * Wait for thread to idle to make sure it isn't processing
>> -             * this entity.
>> -             */
>> -            wait_for_completion(&entity->entity_idle);
>> -
>> -        }
>> -        if (entity->dependency) {
>> -            dma_fence_remove_callback(entity->dependency,
>> -                          &entity->cb);
>> -            dma_fence_put(entity->dependency);
>> -            entity->dependency = NULL;
>> -        }
>> +    drm_sched_entity_kill(entity);
>>   -        drm_sched_entity_kill_jobs(entity);
>> +    if (entity->dependency) {
>> +        dma_fence_remove_callback(entity->dependency, &entity->cb);
>> +        dma_fence_put(entity->dependency);
>> +        entity->dependency = NULL;
>>       }
>>         dma_fence_put(entity->last_scheduled);
>> @@ -415,6 +389,19 @@ static bool 
>> drm_sched_entity_add_dependency_cb(struct drm_sched_entity *entity)
>>       return false;
>>   }
>>   +static struct dma_fence *
>> +drm_sched_job_dependency(struct drm_sched_job *job,
>> +             struct drm_sched_entity *entity)
>> +{
>> +    if (!xa_empty(&job->dependencies))
>> +        return xa_erase(&job->dependencies, job->last_dependency++);
>> +
>> +    if (job->sched->ops->dependency)
>> +        return job->sched->ops->dependency(job, entity);
>> +
>> +    return NULL;
>> +}
>> +
>>   struct drm_sched_job *drm_sched_entity_pop_job(struct 
>> drm_sched_entity *entity)
>>   {
>>       struct drm_sched_job *sched_job;

Re: [PATCH 12/13] drm/scheduler: rework entity flush, kill and fini

[Andrey Grodzovsky]

On 2022-09-30 07:51, Christian König wrote:
> Am 29.09.22 um 21:20 schrieb Andrey Grodzovsky:
>>
>> On 2022-09-29 09:21, Christian König wrote:
>>> This was buggy because when we had to wait for entities which were
>>> killed as well we would just deadlock.
>>>
>>> Instead move all the dependency handling into the callbacks so that
>>> will all happen asynchronously.
>>>
>>> Signed-off-by: Christian König <christian.koenig@amd.com>
>>> ---
>>>   drivers/gpu/drm/scheduler/sched_entity.c | 197 
>>> +++++++++++------------
>>>   1 file changed, 92 insertions(+), 105 deletions(-)
>>>
>>> diff --git a/drivers/gpu/drm/scheduler/sched_entity.c 
>>> b/drivers/gpu/drm/scheduler/sched_entity.c
>>> index 1bb1437a8fed..1d448e376811 100644
>>> --- a/drivers/gpu/drm/scheduler/sched_entity.c
>>> +++ b/drivers/gpu/drm/scheduler/sched_entity.c
>>> @@ -139,6 +139,74 @@ bool drm_sched_entity_is_ready(struct 
>>> drm_sched_entity *entity)
>>>       return true;
>>>   }
>>>   +static void drm_sched_entity_kill_jobs_irq_work(struct irq_work 
>>> *wrk)
>>> +{
>>> +    struct drm_sched_job *job = container_of(wrk, typeof(*job), work);
>>> +
>>> +    drm_sched_fence_scheduled(job->s_fence);
>>> +    drm_sched_fence_finished(job->s_fence);
>>> +    WARN_ON(job->s_fence->parent);
>>> +    job->sched->ops->free_job(job);
>>> +}
>>> +
>>> +/* Signal the scheduler finished fence when the entity in question 
>>> is killed. */
>>> +static void drm_sched_entity_kill_jobs_cb(struct dma_fence *f,
>>> +                      struct dma_fence_cb *cb)
>>> +{
>>> +    struct drm_sched_job *job = container_of(cb, struct drm_sched_job,
>>> +                         finish_cb);
>>> +    int r;
>>> +
>>> +    dma_fence_put(f);
>>> +
>>> +    /* Wait for all dependencies to avoid data corruptions */
>>> +    while (!xa_empty(&job->dependencies)) {
>>> +        f = xa_erase(&job->dependencies, job->last_dependency++);
>>> +        r = dma_fence_add_callback(f, &job->finish_cb,
>>> +                       drm_sched_entity_kill_jobs_cb);
>>> +        if (!r)
>>> +            return;
>>> +
>>> +        dma_fence_put(f);
>>> +    }
>>> +
>>> +    init_irq_work(&job->work, drm_sched_entity_kill_jobs_irq_work);
>>> +    irq_work_queue(&job->work);
>>> +}
>>> +
>>> +/* Remove the entity from the scheduler and kill all pending jobs */
>>> +static void drm_sched_entity_kill(struct drm_sched_entity *entity)
>>> +{
>>> +    struct drm_sched_job *job;
>>> +    struct dma_fence *prev;
>>> +
>>> +    if (!entity->rq)
>>> +        return;
>>> +
>>> +    spin_lock(&entity->rq_lock);
>>> +    entity->stopped = true;
>>> +    drm_sched_rq_remove_entity(entity->rq, entity);
>>> +    spin_unlock(&entity->rq_lock);
>>> +
>>> +    /* Make sure this entity is not used by the scheduler at the 
>>> moment */
>>> +    wait_for_completion(&entity->entity_idle);
>>
>>
>> Does it really stop processing in case more jobs are pending in 
>> entity queue already ?
>> It probably makes sense to integrate drm_sched_entity_is_idle into 
>> drm_sched_entity_is_ready
>> to prevent rq selecting this  entity  in such case
>
> We make sure that the entity is not used for scheduling any more by 
> calling drm_sched_rq_remove_entity() right above this check here.
>
> The wait is only to prevent us from racing with the scheduler thread 
> submitting one more job from the entity.


Ok, missed the entity remove in the code


>
>>
>>> +
>>> +    prev = dma_fence_get(entity->last_scheduled);
>>> +    while ((job = 
>>> to_drm_sched_job(spsc_queue_pop(&entity->job_queue)))) {
>>> +        struct drm_sched_fence *s_fence = job->s_fence;
>>> +
>>> +        dma_fence_set_error(&s_fence->finished, -ESRCH);
>>> +
>>> +        dma_fence_get(&s_fence->finished);
>>> +        if (!prev || dma_fence_add_callback(prev, &job->finish_cb,
>>> +                       drm_sched_entity_kill_jobs_cb))
>>> +            drm_sched_entity_kill_jobs_cb(NULL, &job->finish_cb);
>>> +
>>> +        prev = &s_fence->finished;
>>> +    }
>>> +    dma_fence_put(prev);
>>> +}
>>> +
>>>   /**
>>>    * drm_sched_entity_flush - Flush a context entity
>>>    *
>>> @@ -179,91 +247,13 @@ long drm_sched_entity_flush(struct 
>>> drm_sched_entity *entity, long timeout)
>>>       /* For killed process disable any more IBs enqueue right now */
>>>       last_user = cmpxchg(&entity->last_user, current->group_leader, 
>>> NULL);
>>>       if ((!last_user || last_user == current->group_leader) &&
>>> -        (current->flags & PF_EXITING) && (current->exit_code == 
>>> SIGKILL)) {
>>> -        spin_lock(&entity->rq_lock);
>>> -        entity->stopped = true;
>>> -        drm_sched_rq_remove_entity(entity->rq, entity);
>>> -        spin_unlock(&entity->rq_lock);
>>> -    }
>>> +        (current->flags & PF_EXITING) && (current->exit_code == 
>>> SIGKILL))
>>> +        drm_sched_entity_kill(entity);
>>
>>
>> This reverts 'drm/scheduler: only kill entity if last user is killed 
>> v2' and so might break this use case - when entity
>> gets through FD into child process. Why this needs to be removed ?
>
> This patch isn't reverted. I keep the "last_user == 
> current->group_leader" check in the line above.
>
> Christian.


OK, second time i didn't look carefully... My bad

Another question - you call drm_sched_entity_kill now both in 
drm_sched_entity_flush and in drm_sched_entity_kill_jobs - so
for drm_sched_entity_destroy it will be called twice, no ? because it 
will be called from drm_sched_entity_flush and from
drm_sched_entity_fini. Why we need to call drm_sched_entity_kill from 
flush ? With your new async scheme of jobs killing
we can even leave the flush code unchanged and just call 
drm_sched_entity_kill from drm_sched_entity_fini  and no deadlock
will happen, what I am missing here ?

Andrey


>
>>
>> Andrey
>>
>>
>>>         return ret;
>>>   }
>>>   EXPORT_SYMBOL(drm_sched_entity_flush);
>>>   -static void drm_sched_entity_kill_jobs_irq_work(struct irq_work 
>>> *wrk)
>>> -{
>>> -    struct drm_sched_job *job = container_of(wrk, typeof(*job), work);
>>> -
>>> -    drm_sched_fence_finished(job->s_fence);
>>> -    WARN_ON(job->s_fence->parent);
>>> -    job->sched->ops->free_job(job);
>>> -}
>>> -
>>> -
>>> -/* Signal the scheduler finished fence when the entity in question 
>>> is killed. */
>>> -static void drm_sched_entity_kill_jobs_cb(struct dma_fence *f,
>>> -                      struct dma_fence_cb *cb)
>>> -{
>>> -    struct drm_sched_job *job = container_of(cb, struct drm_sched_job,
>>> -                         finish_cb);
>>> -
>>> -    dma_fence_put(f);
>>> -    init_irq_work(&job->work, drm_sched_entity_kill_jobs_irq_work);
>>> -    irq_work_queue(&job->work);
>>> -}
>>> -
>>> -static struct dma_fence *
>>> -drm_sched_job_dependency(struct drm_sched_job *job,
>>> -             struct drm_sched_entity *entity)
>>> -{
>>> -    if (!xa_empty(&job->dependencies))
>>> -        return xa_erase(&job->dependencies, job->last_dependency++);
>>> -
>>> -    if (job->sched->ops->dependency)
>>> -        return job->sched->ops->dependency(job, entity);
>>> -
>>> -    return NULL;
>>> -}
>>> -
>>> -static void drm_sched_entity_kill_jobs(struct drm_sched_entity 
>>> *entity)
>>> -{
>>> -    struct drm_sched_job *job;
>>> -    struct dma_fence *f;
>>> -    int r;
>>> -
>>> -    while ((job = 
>>> to_drm_sched_job(spsc_queue_pop(&entity->job_queue)))) {
>>> -        struct drm_sched_fence *s_fence = job->s_fence;
>>> -
>>> -        /* Wait for all dependencies to avoid data corruptions */
>>> -        while ((f = drm_sched_job_dependency(job, entity))) {
>>> -            dma_fence_wait(f, false);
>>> -            dma_fence_put(f);
>>> -        }
>>> -
>>> -        drm_sched_fence_scheduled(s_fence);
>>> -        dma_fence_set_error(&s_fence->finished, -ESRCH);
>>> -
>>> -        /*
>>> -         * When pipe is hanged by older entity, new entity might
>>> -         * not even have chance to submit it's first job to HW
>>> -         * and so entity->last_scheduled will remain NULL
>>> -         */
>>> -        if (!entity->last_scheduled) {
>>> -            drm_sched_entity_kill_jobs_cb(NULL, &job->finish_cb);
>>> -            continue;
>>> -        }
>>> -
>>> -        dma_fence_get(entity->last_scheduled);
>>> -        r = dma_fence_add_callback(entity->last_scheduled,
>>> -                       &job->finish_cb,
>>> -                       drm_sched_entity_kill_jobs_cb);
>>> -        if (r == -ENOENT)
>>> -            drm_sched_entity_kill_jobs_cb(NULL, &job->finish_cb);
>>> -        else if (r)
>>> -            DRM_ERROR("fence add callback failed (%d)\n", r);
>>> -    }
>>> -}
>>> -
>>>   /**
>>>    * drm_sched_entity_fini - Destroy a context entity
>>>    *
>>> @@ -277,33 +267,17 @@ static void drm_sched_entity_kill_jobs(struct 
>>> drm_sched_entity *entity)
>>>    */
>>>   void drm_sched_entity_fini(struct drm_sched_entity *entity)
>>>   {
>>> -    struct drm_gpu_scheduler *sched = NULL;
>>> -
>>> -    if (entity->rq) {
>>> -        sched = entity->rq->sched;
>>> -        drm_sched_rq_remove_entity(entity->rq, entity);
>>> -    }
>>> -
>>> -    /* Consumption of existing IBs wasn't completed. Forcefully
>>> -     * remove them here.
>>> +    /*
>>> +     * If consumption of existing IBs wasn't completed. Forcefully 
>>> remove
>>> +     * them here. Also makes sure that the scheduler won't touch 
>>> this entity
>>> +     * any more.
>>>        */
>>> -    if (spsc_queue_count(&entity->job_queue)) {
>>> -        if (sched) {
>>> -            /*
>>> -             * Wait for thread to idle to make sure it isn't 
>>> processing
>>> -             * this entity.
>>> -             */
>>> -            wait_for_completion(&entity->entity_idle);
>>> -
>>> -        }
>>> -        if (entity->dependency) {
>>> -            dma_fence_remove_callback(entity->dependency,
>>> -                          &entity->cb);
>>> -            dma_fence_put(entity->dependency);
>>> -            entity->dependency = NULL;
>>> -        }
>>> +    drm_sched_entity_kill(entity);
>>>   -        drm_sched_entity_kill_jobs(entity);
>>> +    if (entity->dependency) {
>>> +        dma_fence_remove_callback(entity->dependency, &entity->cb);
>>> +        dma_fence_put(entity->dependency);
>>> +        entity->dependency = NULL;
>>>       }
>>>         dma_fence_put(entity->last_scheduled);
>>> @@ -415,6 +389,19 @@ static bool 
>>> drm_sched_entity_add_dependency_cb(struct drm_sched_entity *entity)
>>>       return false;
>>>   }
>>>   +static struct dma_fence *
>>> +drm_sched_job_dependency(struct drm_sched_job *job,
>>> +             struct drm_sched_entity *entity)
>>> +{
>>> +    if (!xa_empty(&job->dependencies))
>>> +        return xa_erase(&job->dependencies, job->last_dependency++);
>>> +
>>> +    if (job->sched->ops->dependency)
>>> +        return job->sched->ops->dependency(job, entity);
>>> +
>>> +    return NULL;
>>> +}
>>> +
>>>   struct drm_sched_job *drm_sched_entity_pop_job(struct 
>>> drm_sched_entity *entity)
>>>   {
>>>       struct drm_sched_job *sched_job;
>

[PATCH 13/13] drm/scheduler: rename dependency callback into prepare_job

[Christian König]

This now matches much better what this is doing.

Signed-off-by: Christian König <christian.koenig@amd.com>
---
 drivers/gpu/drm/amd/amdgpu/amdgpu_job.c  |  4 ++--
 drivers/gpu/drm/scheduler/sched_entity.c |  4 ++--
 include/drm/gpu_scheduler.h              | 13 ++++++-------
 3 files changed, 10 insertions(+), 11 deletions(-)

diff --git a/drivers/gpu/drm/amd/amdgpu/amdgpu_job.c b/drivers/gpu/drm/amd/amdgpu/amdgpu_job.c
index 98e05f16cd55..7176b18f664f 100644
--- a/drivers/gpu/drm/amd/amdgpu/amdgpu_job.c
+++ b/drivers/gpu/drm/amd/amdgpu/amdgpu_job.c
@@ -238,7 +238,7 @@ int amdgpu_job_submit_direct(struct amdgpu_job *job, struct amdgpu_ring *ring,
 }
 
 static struct dma_fence *
-amdgpu_job_dependency(struct drm_sched_job *sched_job,
+amdgpu_job_prepare_job(struct drm_sched_job *sched_job,
 		      struct drm_sched_entity *s_entity)
 {
 	struct amdgpu_ring *ring = to_amdgpu_ring(s_entity->rq->sched);
@@ -327,7 +327,7 @@ void amdgpu_job_stop_all_jobs_on_sched(struct drm_gpu_scheduler *sched)
 }
 
 const struct drm_sched_backend_ops amdgpu_sched_ops = {
-	.dependency = amdgpu_job_dependency,
+	.prepare_job = amdgpu_job_prepare_job,
 	.run_job = amdgpu_job_run,
 	.timedout_job = amdgpu_job_timedout,
 	.free_job = amdgpu_job_free_cb
diff --git a/drivers/gpu/drm/scheduler/sched_entity.c b/drivers/gpu/drm/scheduler/sched_entity.c
index 1d448e376811..45b10ee0c12f 100644
--- a/drivers/gpu/drm/scheduler/sched_entity.c
+++ b/drivers/gpu/drm/scheduler/sched_entity.c
@@ -396,8 +396,8 @@ drm_sched_job_dependency(struct drm_sched_job *job,
 	if (!xa_empty(&job->dependencies))
 		return xa_erase(&job->dependencies, job->last_dependency++);
 
-	if (job->sched->ops->dependency)
-		return job->sched->ops->dependency(job, entity);
+	if (job->sched->ops->prepare_job)
+		return job->sched->ops->prepare_job(job, entity);
 
 	return NULL;
 }
diff --git a/include/drm/gpu_scheduler.h b/include/drm/gpu_scheduler.h
index 5f51eef2a835..5a790d0a0009 100644
--- a/include/drm/gpu_scheduler.h
+++ b/include/drm/gpu_scheduler.h
@@ -297,7 +297,7 @@ struct drm_sched_job {
 	 */
 	union {
 		struct dma_fence_cb		finish_cb;
-		struct irq_work 		work;
+		struct irq_work			work;
 	};
 
 	uint64_t			id;
@@ -338,18 +338,17 @@ enum drm_gpu_sched_stat {
  */
 struct drm_sched_backend_ops {
 	/**
-	 * @dependency:
+	 * @prepare_job:
 	 *
 	 * Called when the scheduler is considering scheduling this job next, to
 	 * get another struct dma_fence for this job to block on.  Once it
 	 * returns NULL, run_job() may be called.
 	 *
-	 * If a driver exclusively uses drm_sched_job_add_dependency() and
-	 * drm_sched_job_add_implicit_dependencies() this can be ommitted and
-	 * left as NULL.
+	 * Can be NULL if no additional preparation to the dependencies are
+	 * necessary. Skipped when jobs are killed instead of run.
 	 */
-	struct dma_fence *(*dependency)(struct drm_sched_job *sched_job,
-					struct drm_sched_entity *s_entity);
+	struct dma_fence *(*prepare_job)(struct drm_sched_job *sched_job,
+					 struct drm_sched_entity *s_entity);
 
 	/**
          * @run_job: Called to execute the job once all of the dependencies
-- 
2.25.1

Re: [PATCH 01/13] drm/scheduler: fix fence ref counting

[Christian König]

I've forgot to add a cover letter, so here some more background to this 
change.

Basically I'm switching amdgpu over to using the dependencies inside the 
drm_sched_job instead of it's own data structure.

This has the major advantage that we can keep those dependencies around 
after the entity is already freed up. Otherwise the blocking for killed 
entities can easily result in a deadlock.

Regards,
Christian.

Am 29.09.22 um 15:21 schrieb Christian König:
> We leaked dependency fences when processes were beeing killed.
>
> Additional to that grab a reference to the last scheduled fence.
>
> Signed-off-by: Christian König <christian.koenig@amd.com>
> ---
>   drivers/gpu/drm/scheduler/sched_entity.c | 6 +++++-
>   1 file changed, 5 insertions(+), 1 deletion(-)
>
> diff --git a/drivers/gpu/drm/scheduler/sched_entity.c b/drivers/gpu/drm/scheduler/sched_entity.c
> index 191c56064f19..1bb1437a8fed 100644
> --- a/drivers/gpu/drm/scheduler/sched_entity.c
> +++ b/drivers/gpu/drm/scheduler/sched_entity.c
> @@ -207,6 +207,7 @@ static void drm_sched_entity_kill_jobs_cb(struct dma_fence *f,
>   	struct drm_sched_job *job = container_of(cb, struct drm_sched_job,
>   						 finish_cb);
>   
> +	dma_fence_put(f);
>   	init_irq_work(&job->work, drm_sched_entity_kill_jobs_irq_work);
>   	irq_work_queue(&job->work);
>   }
> @@ -234,8 +235,10 @@ static void drm_sched_entity_kill_jobs(struct drm_sched_entity *entity)
>   		struct drm_sched_fence *s_fence = job->s_fence;
>   
>   		/* Wait for all dependencies to avoid data corruptions */
> -		while ((f = drm_sched_job_dependency(job, entity)))
> +		while ((f = drm_sched_job_dependency(job, entity))) {
>   			dma_fence_wait(f, false);
> +			dma_fence_put(f);
> +		}
>   
>   		drm_sched_fence_scheduled(s_fence);
>   		dma_fence_set_error(&s_fence->finished, -ESRCH);
> @@ -250,6 +253,7 @@ static void drm_sched_entity_kill_jobs(struct drm_sched_entity *entity)
>   			continue;
>   		}
>   
> +		dma_fence_get(entity->last_scheduled);
>   		r = dma_fence_add_callback(entity->last_scheduled,
>   					   &job->finish_cb,
>   					   drm_sched_entity_kill_jobs_cb);

Fixes for scheduler hang when killing a process

[Christian König]

Hi guys,

rebased those patches on top of amd-staging-drm-next since the
amdgpu changes are quite substencial.

Please review and comment,
Christian.

[PATCH 05/13] drm/amdgpu: drop amdgpu_sync from amdgpu_vmid_grab

[Christian König]

Instead return the fence directly. Avoids memory allocation to store the
fence.

Signed-off-by: Christian König <christian.koenig@amd.com>
---
 drivers/gpu/drm/amd/amdgpu/amdgpu_ids.c | 42 +++++++++++++------------
 drivers/gpu/drm/amd/amdgpu/amdgpu_ids.h |  2 +-
 drivers/gpu/drm/amd/amdgpu/amdgpu_job.c | 12 +++----
 3 files changed, 28 insertions(+), 28 deletions(-)

diff --git a/drivers/gpu/drm/amd/amdgpu/amdgpu_ids.c b/drivers/gpu/drm/amd/amdgpu/amdgpu_ids.c
index b76294d4275b..2a9a2593dc18 100644
--- a/drivers/gpu/drm/amd/amdgpu/amdgpu_ids.c
+++ b/drivers/gpu/drm/amd/amdgpu/amdgpu_ids.c
@@ -170,26 +170,27 @@ bool amdgpu_vmid_had_gpu_reset(struct amdgpu_device *adev,
  *
  * @vm: vm to allocate id for
  * @ring: ring we want to submit job to
- * @sync: sync object where we add dependencies
  * @idle: resulting idle VMID
+ * @fence: fence to wait for if no id could be grabbed
  *
  * Try to find an idle VMID, if none is idle add a fence to wait to the sync
  * object. Returns -ENOMEM when we are out of memory.
  */
 static int amdgpu_vmid_grab_idle(struct amdgpu_vm *vm,
 				 struct amdgpu_ring *ring,
-				 struct amdgpu_sync *sync,
-				 struct amdgpu_vmid **idle)
+				 struct amdgpu_vmid **idle,
+				 struct dma_fence **fence)
 {
 	struct amdgpu_device *adev = ring->adev;
 	unsigned vmhub = ring->funcs->vmhub;
 	struct amdgpu_vmid_mgr *id_mgr = &adev->vm_manager.id_mgr[vmhub];
 	struct dma_fence **fences;
 	unsigned i;
-	int r;
 
-	if (!dma_fence_is_signaled(ring->vmid_wait))
-		return amdgpu_sync_fence(sync, ring->vmid_wait);
+	if (!dma_fence_is_signaled(ring->vmid_wait)) {
+		*fence = dma_fence_get(ring->vmid_wait);
+		return 0;
+	}
 
 	fences = kmalloc_array(id_mgr->num_ids, sizeof(void *), GFP_KERNEL);
 	if (!fences)
@@ -228,10 +229,10 @@ static int amdgpu_vmid_grab_idle(struct amdgpu_vm *vm,
 			return -ENOMEM;
 		}
 
-		r = amdgpu_sync_fence(sync, &array->base);
+		*fence = dma_fence_get(&array->base);
 		dma_fence_put(ring->vmid_wait);
 		ring->vmid_wait = &array->base;
-		return r;
+		return 0;
 	}
 	kfree(fences);
 
@@ -243,17 +244,17 @@ static int amdgpu_vmid_grab_idle(struct amdgpu_vm *vm,
  *
  * @vm: vm to allocate id for
  * @ring: ring we want to submit job to
- * @sync: sync object where we add dependencies
  * @job: job who wants to use the VMID
  * @id: resulting VMID
+ * @fence: fence to wait for if no id could be grabbed
  *
  * Try to assign a reserved VMID.
  */
 static int amdgpu_vmid_grab_reserved(struct amdgpu_vm *vm,
 				     struct amdgpu_ring *ring,
-				     struct amdgpu_sync *sync,
 				     struct amdgpu_job *job,
-				     struct amdgpu_vmid **id)
+				     struct amdgpu_vmid **id,
+				     struct dma_fence **fence)
 {
 	struct amdgpu_device *adev = ring->adev;
 	unsigned vmhub = ring->funcs->vmhub;
@@ -280,7 +281,8 @@ static int amdgpu_vmid_grab_reserved(struct amdgpu_vm *vm,
 		tmp = amdgpu_sync_peek_fence(&(*id)->active, ring);
 		if (tmp) {
 			*id = NULL;
-			return amdgpu_sync_fence(sync, tmp);
+			*fence = dma_fence_get(tmp);
+			return 0;
 		}
 		needs_flush = true;
 	}
@@ -302,17 +304,17 @@ static int amdgpu_vmid_grab_reserved(struct amdgpu_vm *vm,
  *
  * @vm: vm to allocate id for
  * @ring: ring we want to submit job to
- * @sync: sync object where we add dependencies
  * @job: job who wants to use the VMID
  * @id: resulting VMID
+ * @fence: fence to wait for if no id could be grabbed
  *
  * Try to reuse a VMID for this submission.
  */
 static int amdgpu_vmid_grab_used(struct amdgpu_vm *vm,
 				 struct amdgpu_ring *ring,
-				 struct amdgpu_sync *sync,
 				 struct amdgpu_job *job,
-				 struct amdgpu_vmid **id)
+				 struct amdgpu_vmid **id,
+				 struct dma_fence **fence)
 {
 	struct amdgpu_device *adev = ring->adev;
 	unsigned vmhub = ring->funcs->vmhub;
@@ -367,13 +369,13 @@ static int amdgpu_vmid_grab_used(struct amdgpu_vm *vm,
  *
  * @vm: vm to allocate id for
  * @ring: ring we want to submit job to
- * @sync: sync object where we add dependencies
  * @job: job who wants to use the VMID
+ * @fence: fence to wait for if no id could be grabbed
  *
  * Allocate an id for the vm, adding fences to the sync obj as necessary.
  */
 int amdgpu_vmid_grab(struct amdgpu_vm *vm, struct amdgpu_ring *ring,
-		     struct amdgpu_sync *sync, struct amdgpu_job *job)
+		     struct amdgpu_job *job, struct dma_fence **fence)
 {
 	struct amdgpu_device *adev = ring->adev;
 	unsigned vmhub = ring->funcs->vmhub;
@@ -383,16 +385,16 @@ int amdgpu_vmid_grab(struct amdgpu_vm *vm, struct amdgpu_ring *ring,
 	int r = 0;
 
 	mutex_lock(&id_mgr->lock);
-	r = amdgpu_vmid_grab_idle(vm, ring, sync, &idle);
+	r = amdgpu_vmid_grab_idle(vm, ring, &idle, fence);
 	if (r || !idle)
 		goto error;
 
 	if (vm->reserved_vmid[vmhub]) {
-		r = amdgpu_vmid_grab_reserved(vm, ring, sync, job, &id);
+		r = amdgpu_vmid_grab_reserved(vm, ring, job, &id, fence);
 		if (r || !id)
 			goto error;
 	} else {
-		r = amdgpu_vmid_grab_used(vm, ring, sync, job, &id);
+		r = amdgpu_vmid_grab_used(vm, ring, job, &id, fence);
 		if (r)
 			goto error;
 
diff --git a/drivers/gpu/drm/amd/amdgpu/amdgpu_ids.h b/drivers/gpu/drm/amd/amdgpu/amdgpu_ids.h
index 1b1e7d04655c..57efe61dceed 100644
--- a/drivers/gpu/drm/amd/amdgpu/amdgpu_ids.h
+++ b/drivers/gpu/drm/amd/amdgpu/amdgpu_ids.h
@@ -84,7 +84,7 @@ void amdgpu_vmid_free_reserved(struct amdgpu_device *adev,
 			       struct amdgpu_vm *vm,
 			       unsigned vmhub);
 int amdgpu_vmid_grab(struct amdgpu_vm *vm, struct amdgpu_ring *ring,
-		     struct amdgpu_sync *sync, struct amdgpu_job *job);
+		     struct amdgpu_job *job, struct dma_fence **fence);
 void amdgpu_vmid_reset(struct amdgpu_device *adev, unsigned vmhub,
 		       unsigned vmid);
 void amdgpu_vmid_reset_all(struct amdgpu_device *adev);
diff --git a/drivers/gpu/drm/amd/amdgpu/amdgpu_job.c b/drivers/gpu/drm/amd/amdgpu/amdgpu_job.c
index 13b752687b30..e187dc0ab898 100644
--- a/drivers/gpu/drm/amd/amdgpu/amdgpu_job.c
+++ b/drivers/gpu/drm/amd/amdgpu/amdgpu_job.c
@@ -238,12 +238,12 @@ int amdgpu_job_submit_direct(struct amdgpu_job *job, struct amdgpu_ring *ring,
 	return 0;
 }
 
-static struct dma_fence *amdgpu_job_dependency(struct drm_sched_job *sched_job,
-					       struct drm_sched_entity *s_entity)
+static struct dma_fence *
+amdgpu_job_dependency(struct drm_sched_job *sched_job,
+		      struct drm_sched_entity *s_entity)
 {
 	struct amdgpu_ring *ring = to_amdgpu_ring(s_entity->rq->sched);
 	struct amdgpu_job *job = to_amdgpu_job(sched_job);
-	struct amdgpu_vm *vm = job->vm;
 	struct dma_fence *fence;
 	int r;
 
@@ -254,12 +254,10 @@ static struct dma_fence *amdgpu_job_dependency(struct drm_sched_job *sched_job,
 			DRM_ERROR("Error adding fence (%d)\n", r);
 	}
 
-	while (fence == NULL && vm && !job->vmid) {
-		r = amdgpu_vmid_grab(vm, ring, &job->sync, job);
+	while (fence == NULL && job->vm && !job->vmid) {
+		r = amdgpu_vmid_grab(job->vm, ring, job, &fence);
 		if (r)
 			DRM_ERROR("Error getting VM ID (%d)\n", r);
-
-		fence = amdgpu_sync_get_fence(&job->sync);
 	}
 
 	if (!fence && job->gang_submit)
-- 
2.25.1

Re: [PATCH 05/13] drm/amdgpu: drop amdgpu_sync from amdgpu_vmid_grab

[Luben Tuikov]

On 2022-10-14 04:46, Christian König wrote:
> Instead return the fence directly. Avoids memory allocation to store the
> fence.
> 
> Signed-off-by: Christian König <christian.koenig@amd.com>
> ---
>  drivers/gpu/drm/amd/amdgpu/amdgpu_ids.c | 42 +++++++++++++------------
>  drivers/gpu/drm/amd/amdgpu/amdgpu_ids.h |  2 +-
>  drivers/gpu/drm/amd/amdgpu/amdgpu_job.c | 12 +++----
>  3 files changed, 28 insertions(+), 28 deletions(-)
> 
> diff --git a/drivers/gpu/drm/amd/amdgpu/amdgpu_ids.c b/drivers/gpu/drm/amd/amdgpu/amdgpu_ids.c
> index b76294d4275b..2a9a2593dc18 100644
> --- a/drivers/gpu/drm/amd/amdgpu/amdgpu_ids.c
> +++ b/drivers/gpu/drm/amd/amdgpu/amdgpu_ids.c
> @@ -170,26 +170,27 @@ bool amdgpu_vmid_had_gpu_reset(struct amdgpu_device *adev,
>   *
>   * @vm: vm to allocate id for
>   * @ring: ring we want to submit job to
> - * @sync: sync object where we add dependencies
>   * @idle: resulting idle VMID
> + * @fence: fence to wait for if no id could be grabbed
>   *
>   * Try to find an idle VMID, if none is idle add a fence to wait to the sync
>   * object. Returns -ENOMEM when we are out of memory.
>   */
>  static int amdgpu_vmid_grab_idle(struct amdgpu_vm *vm,
>  				 struct amdgpu_ring *ring,
> -				 struct amdgpu_sync *sync,
> -				 struct amdgpu_vmid **idle)
> +				 struct amdgpu_vmid **idle,
> +				 struct dma_fence **fence)
>  {
>  	struct amdgpu_device *adev = ring->adev;
>  	unsigned vmhub = ring->funcs->vmhub;
>  	struct amdgpu_vmid_mgr *id_mgr = &adev->vm_manager.id_mgr[vmhub];
>  	struct dma_fence **fences;
>  	unsigned i;
> -	int r;
>  
> -	if (!dma_fence_is_signaled(ring->vmid_wait))
> -		return amdgpu_sync_fence(sync, ring->vmid_wait);
> +	if (!dma_fence_is_signaled(ring->vmid_wait)) {
> +		*fence = dma_fence_get(ring->vmid_wait);
> +		return 0;
> +	}
>  
>  	fences = kmalloc_array(id_mgr->num_ids, sizeof(void *), GFP_KERNEL);
>  	if (!fences)
> @@ -228,10 +229,10 @@ static int amdgpu_vmid_grab_idle(struct amdgpu_vm *vm,
>  			return -ENOMEM;
>  		}
>  
> -		r = amdgpu_sync_fence(sync, &array->base);
> +		*fence = dma_fence_get(&array->base);
>  		dma_fence_put(ring->vmid_wait);
>  		ring->vmid_wait = &array->base;
> -		return r;
> +		return 0;
>  	}
>  	kfree(fences);
>  
> @@ -243,17 +244,17 @@ static int amdgpu_vmid_grab_idle(struct amdgpu_vm *vm,
>   *
>   * @vm: vm to allocate id for
>   * @ring: ring we want to submit job to
> - * @sync: sync object where we add dependencies
>   * @job: job who wants to use the VMID
>   * @id: resulting VMID
> + * @fence: fence to wait for if no id could be grabbed
>   *
>   * Try to assign a reserved VMID.
>   */
>  static int amdgpu_vmid_grab_reserved(struct amdgpu_vm *vm,
>  				     struct amdgpu_ring *ring,
> -				     struct amdgpu_sync *sync,
>  				     struct amdgpu_job *job,
> -				     struct amdgpu_vmid **id)
> +				     struct amdgpu_vmid **id,
> +				     struct dma_fence **fence)
>  {
>  	struct amdgpu_device *adev = ring->adev;
>  	unsigned vmhub = ring->funcs->vmhub;
> @@ -280,7 +281,8 @@ static int amdgpu_vmid_grab_reserved(struct amdgpu_vm *vm,
>  		tmp = amdgpu_sync_peek_fence(&(*id)->active, ring);
>  		if (tmp) {
>  			*id = NULL;
> -			return amdgpu_sync_fence(sync, tmp);
> +			*fence = dma_fence_get(tmp);
> +			return 0;
>  		}
>  		needs_flush = true;
>  	}
> @@ -302,17 +304,17 @@ static int amdgpu_vmid_grab_reserved(struct amdgpu_vm *vm,
>   *
>   * @vm: vm to allocate id for
>   * @ring: ring we want to submit job to
> - * @sync: sync object where we add dependencies
>   * @job: job who wants to use the VMID
>   * @id: resulting VMID
> + * @fence: fence to wait for if no id could be grabbed
>   *
>   * Try to reuse a VMID for this submission.
>   */
>  static int amdgpu_vmid_grab_used(struct amdgpu_vm *vm,
>  				 struct amdgpu_ring *ring,
> -				 struct amdgpu_sync *sync,
>  				 struct amdgpu_job *job,
> -				 struct amdgpu_vmid **id)
> +				 struct amdgpu_vmid **id,
> +				 struct dma_fence **fence)
>  {
>  	struct amdgpu_device *adev = ring->adev;
>  	unsigned vmhub = ring->funcs->vmhub;
> @@ -367,13 +369,13 @@ static int amdgpu_vmid_grab_used(struct amdgpu_vm *vm,
>   *
>   * @vm: vm to allocate id for
>   * @ring: ring we want to submit job to
> - * @sync: sync object where we add dependencies
>   * @job: job who wants to use the VMID
> + * @fence: fence to wait for if no id could be grabbed
>   *
>   * Allocate an id for the vm, adding fences to the sync obj as necessary.
>   */
>  int amdgpu_vmid_grab(struct amdgpu_vm *vm, struct amdgpu_ring *ring,
> -		     struct amdgpu_sync *sync, struct amdgpu_job *job)
> +		     struct amdgpu_job *job, struct dma_fence **fence)
>  {
>  	struct amdgpu_device *adev = ring->adev;
>  	unsigned vmhub = ring->funcs->vmhub;
> @@ -383,16 +385,16 @@ int amdgpu_vmid_grab(struct amdgpu_vm *vm, struct amdgpu_ring *ring,
>  	int r = 0;
>  
>  	mutex_lock(&id_mgr->lock);
> -	r = amdgpu_vmid_grab_idle(vm, ring, sync, &idle);
> +	r = amdgpu_vmid_grab_idle(vm, ring, &idle, fence);
>  	if (r || !idle)
>  		goto error;
>  
>  	if (vm->reserved_vmid[vmhub]) {
> -		r = amdgpu_vmid_grab_reserved(vm, ring, sync, job, &id);
> +		r = amdgpu_vmid_grab_reserved(vm, ring, job, &id, fence);
>  		if (r || !id)
>  			goto error;
>  	} else {
> -		r = amdgpu_vmid_grab_used(vm, ring, sync, job, &id);
> +		r = amdgpu_vmid_grab_used(vm, ring, job, &id, fence);
>  		if (r)
>  			goto error;
>  
> diff --git a/drivers/gpu/drm/amd/amdgpu/amdgpu_ids.h b/drivers/gpu/drm/amd/amdgpu/amdgpu_ids.h
> index 1b1e7d04655c..57efe61dceed 100644
> --- a/drivers/gpu/drm/amd/amdgpu/amdgpu_ids.h
> +++ b/drivers/gpu/drm/amd/amdgpu/amdgpu_ids.h
> @@ -84,7 +84,7 @@ void amdgpu_vmid_free_reserved(struct amdgpu_device *adev,
>  			       struct amdgpu_vm *vm,
>  			       unsigned vmhub);
>  int amdgpu_vmid_grab(struct amdgpu_vm *vm, struct amdgpu_ring *ring,
> -		     struct amdgpu_sync *sync, struct amdgpu_job *job);
> +		     struct amdgpu_job *job, struct dma_fence **fence);
>  void amdgpu_vmid_reset(struct amdgpu_device *adev, unsigned vmhub,
>  		       unsigned vmid);
>  void amdgpu_vmid_reset_all(struct amdgpu_device *adev);
> diff --git a/drivers/gpu/drm/amd/amdgpu/amdgpu_job.c b/drivers/gpu/drm/amd/amdgpu/amdgpu_job.c
> index 13b752687b30..e187dc0ab898 100644
> --- a/drivers/gpu/drm/amd/amdgpu/amdgpu_job.c
> +++ b/drivers/gpu/drm/amd/amdgpu/amdgpu_job.c
> @@ -238,12 +238,12 @@ int amdgpu_job_submit_direct(struct amdgpu_job *job, struct amdgpu_ring *ring,
>  	return 0;
>  }
>  
> -static struct dma_fence *amdgpu_job_dependency(struct drm_sched_job *sched_job,
> -					       struct drm_sched_entity *s_entity)
> +static struct dma_fence *
> +amdgpu_job_dependency(struct drm_sched_job *sched_job,
> +		      struct drm_sched_entity *s_entity)
>  {
>  	struct amdgpu_ring *ring = to_amdgpu_ring(s_entity->rq->sched);
>  	struct amdgpu_job *job = to_amdgpu_job(sched_job);
> -	struct amdgpu_vm *vm = job->vm;
>  	struct dma_fence *fence;
>  	int r;
>  
> @@ -254,12 +254,10 @@ static struct dma_fence *amdgpu_job_dependency(struct drm_sched_job *sched_job,
>  			DRM_ERROR("Error adding fence (%d)\n", r);
>  	}
>  
> -	while (fence == NULL && vm && !job->vmid) {
> -		r = amdgpu_vmid_grab(vm, ring, &job->sync, job);
> +	while (fence == NULL && job->vm && !job->vmid) {

In preliminary application of the patch series, checkpatch.pl complains about comparison to NULL,
and wants !fence, instead:

	while (!fence && job->vm && !job->vmid) {

I can see that it had been like this before... and I know it's out of the scope of this series,
but we should fix this at some point in time.

Regards,
Luben

Re: [PATCH 05/13] drm/amdgpu: drop amdgpu_sync from amdgpu_vmid_grab

[Christian König]

Am 23.10.22 um 03:25 schrieb Luben Tuikov:
> On 2022-10-14 04:46, Christian König wrote:
>> [SNIP]
>> @@ -254,12 +254,10 @@ static struct dma_fence *amdgpu_job_dependency(struct drm_sched_job *sched_job,
>>   			DRM_ERROR("Error adding fence (%d)\n", r);
>>   	}
>>   
>> -	while (fence == NULL && vm && !job->vmid) {
>> -		r = amdgpu_vmid_grab(vm, ring, &job->sync, job);
>> +	while (fence == NULL && job->vm && !job->vmid) {
> In preliminary application of the patch series, checkpatch.pl complains about comparison to NULL,
> and wants !fence, instead:
>
> 	while (!fence && job->vm && !job->vmid) {
>
> I can see that it had been like this before... and I know it's out of the scope of this series,
> but we should fix this at some point in time.

Thanks for pointing that out. I try to fix it whenever I encounter 
something like this, but sometimes just forget to double check.

Thanks,
Christian.

>
> Regards,
> Luben
>