drm/amdgpu: use scheduler dependencies for VM updates

Instead of putting that into the job sync object.

Signed-off-by: Christian König <christian.koenig@amd.com>
Reviewed-by: Luben Tuikov <luben.tuikov@amd.com>
Link: https://patchwork.freedesktop.org/patch/msgid/20221014084641.128280-9-christian.koenig@amd.com

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);
 }
 
 /**

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);

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;