drm/radeon: remove global vm lock

Not needed any more.

Signed-off-by: Christian König <christian.koenig@amd.com>
Reviewed-by: Alex Deucher <alexander.deucher@amd.com>

drivers/gpu/drm/radeon/radeon.h

@@ -884,7 +884,6 @@ struct radeon_vm {
 };
 
 struct radeon_vm_manager {
-	struct mutex			lock;
 	struct radeon_fence		*active[RADEON_NUM_VM];
 	uint32_t			max_pfn;
 	/* number of VMIDs */

drivers/gpu/drm/radeon/radeon_cs.c

@@ -502,7 +502,6 @@ static int radeon_cs_ib_vm_chunk(struct radeon_device *rdev,
 	if (parser->ring == R600_RING_TYPE_UVD_INDEX)
 		radeon_uvd_note_usage(rdev);
 
-	mutex_lock(&rdev->vm_manager.lock);
 	mutex_lock(&vm->mutex);
 	r = radeon_bo_vm_update_pte(parser, vm);
 	if (r) {
@@ -510,8 +509,6 @@ static int radeon_cs_ib_vm_chunk(struct radeon_device *rdev,
 	}
 	radeon_cs_sync_rings(parser);
 	radeon_semaphore_sync_to(parser->ib.semaphore, vm->fence);
-	radeon_semaphore_sync_to(parser->ib.semaphore,
-				 radeon_vm_grab_id(rdev, vm, parser->ring));
 
 	if ((rdev->family >= CHIP_TAHITI) &&
 	    (parser->chunk_const_ib_idx != -1)) {
@@ -522,7 +519,6 @@ static int radeon_cs_ib_vm_chunk(struct radeon_device *rdev,
 
 out:
 	mutex_unlock(&vm->mutex);
-	mutex_unlock(&rdev->vm_manager.lock);
 	return r;
 }
 

drivers/gpu/drm/radeon/radeon_device.c

@@ -1191,8 +1191,7 @@ int radeon_device_init(struct radeon_device *rdev,
 	r = radeon_gem_init(rdev);
 	if (r)
 		return r;
-	/* initialize vm here */
-	mutex_init(&rdev->vm_manager.lock);
+
 	/* Adjust VM size here.
 	 * Currently set to 4GB ((1 << 20) 4k pages).
 	 * Max GPUVM size for cayman and SI is 40 bits.

drivers/gpu/drm/radeon/radeon_ring.c

@@ -145,6 +145,13 @@ int radeon_ib_schedule(struct radeon_device *rdev, struct radeon_ib *ib,
 		return r;
 	}
 
+	/* grab a vm id if necessary */
+	if (ib->vm) {
+		struct radeon_fence *vm_id_fence;
+		vm_id_fence = radeon_vm_grab_id(rdev, ib->vm, ib->ring);
+        	radeon_semaphore_sync_to(ib->semaphore, vm_id_fence);
+	}
+
 	/* sync with other rings */
 	r = radeon_semaphore_sync_rings(rdev, ib->semaphore, ib->ring);
 	if (r) {

drivers/gpu/drm/radeon/radeon_vm.c

@@ -110,12 +110,10 @@ void radeon_vm_manager_fini(struct radeon_device *rdev)
 	if (!rdev->vm_manager.enabled)
 		return;
 
-	mutex_lock(&rdev->vm_manager.lock);
 	for (i = 0; i < RADEON_NUM_VM; ++i)
 		radeon_fence_unref(&rdev->vm_manager.active[i]);
 	radeon_asic_vm_fini(rdev);
 	rdev->vm_manager.enabled = false;
-	mutex_unlock(&rdev->vm_manager.lock);
 }
 
 /**
@@ -734,7 +732,7 @@ static void radeon_vm_update_ptes(struct radeon_device *rdev,
  * Fill in the page table entries for @bo (cayman+).
  * Returns 0 for success, -EINVAL for failure.
  *
- * Object have to be reserved & global and local mutex must be locked!
+ * Object have to be reserved and mutex must be locked!
  */
 int radeon_vm_bo_update(struct radeon_device *rdev,
 			struct radeon_vm *vm,
@@ -842,12 +840,10 @@ int radeon_vm_bo_rmv(struct radeon_device *rdev,
 {
 	int r = 0;
 
-	mutex_lock(&rdev->vm_manager.lock);
 	mutex_lock(&bo_va->vm->mutex);
-	if (bo_va->soffset) {
+	if (bo_va->soffset)
 		r = radeon_vm_bo_update(rdev, bo_va->vm, bo_va->bo, NULL);
-	}
-	mutex_unlock(&rdev->vm_manager.lock);
+
 	list_del(&bo_va->vm_list);
 	mutex_unlock(&bo_va->vm->mutex);
 	list_del(&bo_va->bo_list);