drm/amdgpu: remove distinction between explicit and implicit sync (v2)

According to Marek a pipeline sync should be inserted for implicit syncs well.

v2: bump the driver version
Signed-off-by: Christian König <christian.koenig@amd.com>
Tested-by: Marek Olšák <marek.olsak@amd.com>
Signed-off-by: Marek Olšák <marek.olsak@amd.com>
Signed-off-by: Alex Deucher <alexander.deucher@amd.com>

drivers/gpu/drm/amd/amdgpu/amdgpu_amdkfd_gpuvm.c

@@ -395,7 +395,7 @@ static int vm_update_pds(struct amdgpu_vm *vm, struct amdgpu_sync *sync)
 	if (ret)
 		return ret;
 
-	return amdgpu_sync_fence(sync, vm->last_update, false);
+	return amdgpu_sync_fence(sync, vm->last_update);
 }
 
 static uint64_t get_pte_flags(struct amdgpu_device *adev, struct kgd_mem *mem)
@@ -785,7 +785,7 @@ static int unmap_bo_from_gpuvm(struct amdgpu_device *adev,
 
 	amdgpu_vm_clear_freed(adev, vm, &bo_va->last_pt_update);
 
-	amdgpu_sync_fence(sync, bo_va->last_pt_update, false);
+	amdgpu_sync_fence(sync, bo_va->last_pt_update);
 
 	return 0;
 }
@@ -804,7 +804,7 @@ static int update_gpuvm_pte(struct amdgpu_device *adev,
 		return ret;
 	}
 
-	return amdgpu_sync_fence(sync, bo_va->last_pt_update, false);
+	return amdgpu_sync_fence(sync, bo_va->last_pt_update);
 }
 
 static int map_bo_to_gpuvm(struct amdgpu_device *adev,
@@ -2102,7 +2102,7 @@ int amdgpu_amdkfd_gpuvm_restore_process_bos(void *info, struct dma_fence **ef)
 			pr_debug("Memory eviction: Validate BOs failed. Try again\n");
 			goto validate_map_fail;
 		}
-		ret = amdgpu_sync_fence(&sync_obj, bo->tbo.moving, false);
+		ret = amdgpu_sync_fence(&sync_obj, bo->tbo.moving);
 		if (ret) {
 			pr_debug("Memory eviction: Sync BO fence failed. Try again\n");
 			goto validate_map_fail;

drivers/gpu/drm/amd/amdgpu/amdgpu_cs.c

@@ -992,7 +992,7 @@ static int amdgpu_cs_process_fence_dep(struct amdgpu_cs_parser *p,
 			dma_fence_put(old);
 		}
 
-		r = amdgpu_sync_fence(&p->job->sync, fence, true);
+		r = amdgpu_sync_fence(&p->job->sync, fence);
 		dma_fence_put(fence);
 		if (r)
 			return r;
@@ -1014,7 +1014,7 @@ static int amdgpu_syncobj_lookup_and_add_to_sync(struct amdgpu_cs_parser *p,
 		return r;
 	}
 
-	r = amdgpu_sync_fence(&p->job->sync, fence, true);
+	r = amdgpu_sync_fence(&p->job->sync, fence);
 	dma_fence_put(fence);
 
 	return r;

drivers/gpu/drm/amd/amdgpu/amdgpu_drv.c

@@ -87,9 +87,10 @@
  * - 3.36.0 - Allow reading more status registers on si/cik
  * - 3.37.0 - L2 is invalidated before SDMA IBs, needed for correctness
  * - 3.38.0 - Add AMDGPU_IB_FLAG_EMIT_MEM_SYNC
+ * - 3.39.0 - DMABUF implicit sync does a full pipeline sync
  */
 #define KMS_DRIVER_MAJOR	3
-#define KMS_DRIVER_MINOR	38
+#define KMS_DRIVER_MINOR	39
 #define KMS_DRIVER_PATCHLEVEL	0
 
 int amdgpu_vram_limit = 0;

drivers/gpu/drm/amd/amdgpu/amdgpu_ib.c

@@ -178,7 +178,7 @@ 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, NULL)) ||
+	    ((tmp = amdgpu_sync_get_fence(&job->sched_sync)) ||
 	     (amdgpu_sriov_vf(adev) && need_ctx_switch) ||
 	     amdgpu_vm_need_pipeline_sync(ring, job))) {
 		need_pipe_sync = true;

drivers/gpu/drm/amd/amdgpu/amdgpu_ids.c

@@ -206,7 +206,7 @@ static int amdgpu_vmid_grab_idle(struct amdgpu_vm *vm,
 	int r;
 
 	if (ring->vmid_wait && !dma_fence_is_signaled(ring->vmid_wait))
-		return amdgpu_sync_fence(sync, ring->vmid_wait, false);
+		return amdgpu_sync_fence(sync, ring->vmid_wait);
 
 	fences = kmalloc_array(sizeof(void *), id_mgr->num_ids, GFP_KERNEL);
 	if (!fences)
@@ -241,7 +241,7 @@ static int amdgpu_vmid_grab_idle(struct amdgpu_vm *vm,
 			return -ENOMEM;
 		}
 
-		r = amdgpu_sync_fence(sync, &array->base, false);
+		r = amdgpu_sync_fence(sync, &array->base);
 		dma_fence_put(ring->vmid_wait);
 		ring->vmid_wait = &array->base;
 		return r;
@@ -294,7 +294,7 @@ static int amdgpu_vmid_grab_reserved(struct amdgpu_vm *vm,
 		tmp = amdgpu_sync_peek_fence(&(*id)->active, ring);
 		if (tmp) {
 			*id = NULL;
-			r = amdgpu_sync_fence(sync, tmp, false);
+			r = amdgpu_sync_fence(sync, tmp);
 			return r;
 		}
 		needs_flush = true;
@@ -303,7 +303,7 @@ 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, false);
+	r = amdgpu_sync_fence(&(*id)->active, fence);
 	if (r)
 		return r;
 
@@ -375,7 +375,7 @@ 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, false);
+		r = amdgpu_sync_fence(&(*id)->active, fence);
 		if (r)
 			return r;
 
@@ -435,7 +435,7 @@ 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, false);
+			r = amdgpu_sync_fence(&id->active, fence);
 			if (r)
 				goto error;
 

drivers/gpu/drm/amd/amdgpu/amdgpu_job.c

@@ -183,16 +183,13 @@ static struct dma_fence *amdgpu_job_dependency(struct drm_sched_job *sched_job,
 	struct amdgpu_job *job = to_amdgpu_job(sched_job);
 	struct amdgpu_vm *vm = job->vm;
 	struct dma_fence *fence;
-	bool explicit = false;
 	int r;
 
-	fence = amdgpu_sync_get_fence(&job->sync, &explicit);
-	if (fence && explicit) {
-		if (drm_sched_dependency_optimized(fence, s_entity)) {
-			r = amdgpu_sync_fence(&job->sched_sync, fence, false);
-			if (r)
-				DRM_ERROR("Error adding fence (%d)\n", 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 && vm && !job->vmid) {
@@ -202,7 +199,7 @@ static struct dma_fence *amdgpu_job_dependency(struct drm_sched_job *sched_job,
 		if (r)
 			DRM_ERROR("Error getting VM ID (%d)\n", r);
 
-		fence = amdgpu_sync_get_fence(&job->sync, NULL);
+		fence = amdgpu_sync_get_fence(&job->sync);
 	}
 
 	return fence;

drivers/gpu/drm/amd/amdgpu/amdgpu_sync.c

@@ -35,7 +35,6 @@
 struct amdgpu_sync_entry {
 	struct hlist_node	node;
 	struct dma_fence	*fence;
-	bool	explicit;
 };
 
 static struct kmem_cache *amdgpu_sync_slab;
@@ -129,8 +128,7 @@ static void amdgpu_sync_keep_later(struct dma_fence **keep,
  * Tries to add the fence to an existing hash entry. Returns true when an entry
  * was found, false otherwise.
  */
-static bool amdgpu_sync_add_later(struct amdgpu_sync *sync, struct dma_fence *f,
-				  bool explicit)
+static bool amdgpu_sync_add_later(struct amdgpu_sync *sync, struct dma_fence *f)
 {
 	struct amdgpu_sync_entry *e;
 
@@ -139,10 +137,6 @@ static bool amdgpu_sync_add_later(struct amdgpu_sync *sync, struct dma_fence *f,
 			continue;
 
 		amdgpu_sync_keep_later(&e->fence, f);
-
-		/* Preserve eplicit flag to not loose pipe line sync */
-		e->explicit |= explicit;
-
 		return true;
 	}
 	return false;
@@ -153,27 +147,23 @@ static bool amdgpu_sync_add_later(struct amdgpu_sync *sync, struct dma_fence *f,
  *
  * @sync: sync object to add fence to
  * @f: fence to sync to
- * @explicit: if this is an explicit dependency
  *
  * Add the fence to the sync object.
  */
-int amdgpu_sync_fence(struct amdgpu_sync *sync, struct dma_fence *f,
-		      bool explicit)
+int amdgpu_sync_fence(struct amdgpu_sync *sync, struct dma_fence *f)
 {
 	struct amdgpu_sync_entry *e;
 
 	if (!f)
 		return 0;
 
-	if (amdgpu_sync_add_later(sync, f, explicit))
+	if (amdgpu_sync_add_later(sync, f))
 		return 0;
 
 	e = kmem_cache_alloc(amdgpu_sync_slab, GFP_KERNEL);
 	if (!e)
 		return -ENOMEM;
 
-	e->explicit = explicit;
-
 	hash_add(sync->fences, &e->node, f->context);
 	e->fence = dma_fence_get(f);
 	return 0;
@@ -194,7 +184,7 @@ int amdgpu_sync_vm_fence(struct amdgpu_sync *sync, struct dma_fence *fence)
 		return 0;
 
 	amdgpu_sync_keep_later(&sync->last_vm_update, fence);
-	return amdgpu_sync_fence(sync, fence, false);
+	return amdgpu_sync_fence(sync, fence);
 }
 
 /**
@@ -221,7 +211,7 @@ int amdgpu_sync_resv(struct amdgpu_device *adev, struct amdgpu_sync *sync,
 
 	/* always sync to the exclusive fence */
 	f = dma_resv_get_excl(resv);
-	r = amdgpu_sync_fence(sync, f, false);
+	r = amdgpu_sync_fence(sync, f);
 
 	flist = dma_resv_get_list(resv);
 	if (!flist || r)
@@ -237,7 +227,7 @@ int amdgpu_sync_resv(struct amdgpu_device *adev, struct amdgpu_sync *sync,
 
 		/* Always sync to moves, no matter what */
 		if (fence_owner == AMDGPU_FENCE_OWNER_UNDEFINED) {
-			r = amdgpu_sync_fence(sync, f, false);
+			r = amdgpu_sync_fence(sync, f);
 			if (r)
 				break;
 		}
@@ -277,7 +267,7 @@ int amdgpu_sync_resv(struct amdgpu_device *adev, struct amdgpu_sync *sync,
 
 		WARN(debug_evictions && fence_owner == AMDGPU_FENCE_OWNER_KFD,
 		     "Adding eviction fence to sync obj");
-		r = amdgpu_sync_fence(sync, f, false);
+		r = amdgpu_sync_fence(sync, f);
 		if (r)
 			break;
 	}
@@ -332,11 +322,10 @@ struct dma_fence *amdgpu_sync_peek_fence(struct amdgpu_sync *sync,
  * amdgpu_sync_get_fence - get the next fence from the sync object
  *
  * @sync: sync object to use
- * @explicit: true if the next fence is explicit
  *
  * Get and removes the next fence from the sync object not signaled yet.
  */
-struct dma_fence *amdgpu_sync_get_fence(struct amdgpu_sync *sync, bool *explicit)
+struct dma_fence *amdgpu_sync_get_fence(struct amdgpu_sync *sync)
 {
 	struct amdgpu_sync_entry *e;
 	struct hlist_node *tmp;
@@ -345,8 +334,6 @@ struct dma_fence *amdgpu_sync_get_fence(struct amdgpu_sync *sync, bool *explicit
 	hash_for_each_safe(sync->fences, i, tmp, e, node) {
 
 		f = e->fence;
-		if (explicit)
-			*explicit = e->explicit;
 
 		hash_del(&e->node);
 		kmem_cache_free(amdgpu_sync_slab, e);
@@ -378,7 +365,7 @@ int amdgpu_sync_clone(struct amdgpu_sync *source, struct amdgpu_sync *clone)
 	hash_for_each_safe(source->fences, i, tmp, e, node) {
 		f = e->fence;
 		if (!dma_fence_is_signaled(f)) {
-			r = amdgpu_sync_fence(clone, f, e->explicit);
+			r = amdgpu_sync_fence(clone, f);
 			if (r)
 				return r;
 		} else {

drivers/gpu/drm/amd/amdgpu/amdgpu_sync.h

@@ -47,16 +47,14 @@ struct amdgpu_sync {
 };
 
 void amdgpu_sync_create(struct amdgpu_sync *sync);
-int amdgpu_sync_fence(struct amdgpu_sync *sync, struct dma_fence *f,
-		      bool explicit);
+int amdgpu_sync_fence(struct amdgpu_sync *sync, struct dma_fence *f);
 int amdgpu_sync_vm_fence(struct amdgpu_sync *sync, struct dma_fence *fence);
 int amdgpu_sync_resv(struct amdgpu_device *adev, struct amdgpu_sync *sync,
 		     struct dma_resv *resv, enum amdgpu_sync_mode mode,
 		     void *owner);
 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,
-					bool *explicit);
+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_wait(struct amdgpu_sync *sync, bool intr);
 void amdgpu_sync_free(struct amdgpu_sync *sync);

drivers/gpu/drm/amd/amdgpu/amdgpu_vm_sdma.c

@@ -208,7 +208,7 @@ static int amdgpu_vm_sdma_update(struct amdgpu_vm_update_params *p,
 	int r;
 
 	/* Wait for PD/PT moves to be completed */
-	r = amdgpu_sync_fence(&p->job->sync, bo->tbo.moving, false);
+	r = amdgpu_sync_fence(&p->job->sync, bo->tbo.moving);
 	if (r)
 		return r;