drm/msm: Add VMA unmap reason

Make the VM log a bit more useful by providing a reason for the unmap
(ie. closing VM vs evict/purge, etc)

Signed-off-by: Rob Clark <robdclark@chromium.org>
Signed-off-by: Rob Clark <robin.clark@oss.qualcomm.com>
Tested-by: Antonino Maniscalco <antomani103@gmail.com>
Reviewed-by: Antonino Maniscalco <antomani103@gmail.com>
Patchwork: https://patchwork.freedesktop.org/patch/661527/

Author: robclark

drivers/gpu/drm/msm/msm_gem.c

@@ -43,7 +43,8 @@ static int msm_gem_open(struct drm_gem_object *obj, struct drm_file *file)
 	return 0;
 }
 
-static void put_iova_spaces(struct drm_gem_object *obj, struct drm_gpuvm *vm, bool close);
+static void put_iova_spaces(struct drm_gem_object *obj, struct drm_gpuvm *vm,
+			    bool close, const char *reason);
 
 static void detach_vm(struct drm_gem_object *obj, struct drm_gpuvm *vm)
 {
@@ -57,7 +58,7 @@ static void detach_vm(struct drm_gem_object *obj, struct drm_gpuvm *vm)
 		drm_gpuvm_bo_for_each_va (vma, vm_bo) {
 			if (vma->vm != vm)
 				continue;
-			msm_gem_vma_unmap(vma);
+			msm_gem_vma_unmap(vma, "detach");
 			msm_gem_vma_close(vma);
 			break;
 		}
@@ -97,7 +98,7 @@ static void msm_gem_close(struct drm_gem_object *obj, struct drm_file *file)
 			      MAX_SCHEDULE_TIMEOUT);
 
 	msm_gem_lock_vm_and_obj(&exec, obj, ctx->vm);
-	put_iova_spaces(obj, ctx->vm, true);
+	put_iova_spaces(obj, ctx->vm, true, "close");
 	detach_vm(obj, ctx->vm);
 	drm_exec_fini(&exec);     /* drop locks */
 }
@@ -425,7 +426,8 @@ static struct drm_gpuva *lookup_vma(struct drm_gem_object *obj,
  * mapping.
  */
 static void
-put_iova_spaces(struct drm_gem_object *obj, struct drm_gpuvm *vm, bool close)
+put_iova_spaces(struct drm_gem_object *obj, struct drm_gpuvm *vm,
+		bool close, const char *reason)
 {
 	struct drm_gpuvm_bo *vm_bo, *tmp;
 
@@ -440,7 +442,7 @@ put_iova_spaces(struct drm_gem_object *obj, struct drm_gpuvm *vm, bool close)
 		drm_gpuvm_bo_get(vm_bo);
 
 		drm_gpuvm_bo_for_each_va_safe (vma, vmatmp, vm_bo) {
-			msm_gem_vma_unmap(vma);
+			msm_gem_vma_unmap(vma, reason);
 			if (close)
 				msm_gem_vma_close(vma);
 		}
@@ -617,7 +619,7 @@ static int clear_iova(struct drm_gem_object *obj,
 	if (!vma)
 		return 0;
 
-	msm_gem_vma_unmap(vma);
+	msm_gem_vma_unmap(vma, NULL);
 	msm_gem_vma_close(vma);
 
 	return 0;
@@ -829,7 +831,7 @@ void msm_gem_purge(struct drm_gem_object *obj)
 	GEM_WARN_ON(!is_purgeable(msm_obj));
 
 	/* Get rid of any iommu mapping(s): */
-	put_iova_spaces(obj, NULL, false);
+	put_iova_spaces(obj, NULL, false, "purge");
 
 	msm_gem_vunmap(obj);
 
@@ -867,7 +869,7 @@ void msm_gem_evict(struct drm_gem_object *obj)
 	GEM_WARN_ON(is_unevictable(msm_obj));
 
 	/* Get rid of any iommu mapping(s): */
-	put_iova_spaces(obj, NULL, false);
+	put_iova_spaces(obj, NULL, false, "evict");
 
 	drm_vma_node_unmap(&obj->vma_node, dev->anon_inode->i_mapping);
 
@@ -1079,7 +1081,7 @@ static void msm_gem_free_object(struct drm_gem_object *obj)
 				drm_exec_retry_on_contention(&exec);
 			}
 		}
-		put_iova_spaces(obj, NULL, true);
+		put_iova_spaces(obj, NULL, true, "free");
 		drm_exec_fini(&exec);     /* drop locks */
 	}
 

drivers/gpu/drm/msm/msm_gem.h

@@ -168,7 +168,7 @@ struct msm_gem_vma {
 struct drm_gpuva *
 msm_gem_vma_new(struct drm_gpuvm *vm, struct drm_gem_object *obj,
 		u64 offset, u64 range_start, u64 range_end);
-void msm_gem_vma_unmap(struct drm_gpuva *vma);
+void msm_gem_vma_unmap(struct drm_gpuva *vma, const char *reason);
 int msm_gem_vma_map(struct drm_gpuva *vma, int prot, struct sg_table *sgt);
 void msm_gem_vma_close(struct drm_gpuva *vma);
 

drivers/gpu/drm/msm/msm_gem_vma.c

@@ -53,6 +53,9 @@ struct msm_vm_unmap_op {
 	/** @range: size of region to unmap */
 	uint64_t range;
 
+	/** @reason: The reason for the unmap */
+	const char *reason;
+
 	/**
 	 * @queue_id: The id of the submitqueue the operation is performed
 	 * on, or zero for (in particular) UNMAP ops triggered outside of
@@ -242,7 +245,12 @@ vm_log(struct msm_gem_vm *vm, const char *op, uint64_t iova, uint64_t range, int
 static void
 vm_unmap_op(struct msm_gem_vm *vm, const struct msm_vm_unmap_op *op)
 {
-	vm_log(vm, "unmap", op->iova, op->range, op->queue_id);
+	const char *reason = op->reason;
+
+	if (!reason)
+		reason = "unmap";
+
+	vm_log(vm, reason, op->iova, op->range, op->queue_id);
 
 	vm->mmu->funcs->unmap(vm->mmu, op->iova, op->range);
 }
@@ -257,7 +265,7 @@ vm_map_op(struct msm_gem_vm *vm, const struct msm_vm_map_op *op)
 }
 
 /* Actually unmap memory for the vma */
-void msm_gem_vma_unmap(struct drm_gpuva *vma)
+void msm_gem_vma_unmap(struct drm_gpuva *vma, const char *reason)
 {
 	struct msm_gem_vm *vm = to_msm_vm(vma->vm);
 	struct msm_gem_vma *msm_vma = to_msm_vma(vma);
@@ -277,6 +285,7 @@ void msm_gem_vma_unmap(struct drm_gpuva *vma)
 	vm_unmap_op(vm, &(struct msm_vm_unmap_op){
 		.iova = vma->va.addr,
 		.range = vma->va.range,
+		.reason = reason,
 	});
 
 	if (!vm->managed)
@@ -863,7 +872,7 @@ msm_gem_vm_close(struct drm_gpuvm *gpuvm)
 				drm_exec_retry_on_contention(&exec);
 			}
 
-			msm_gem_vma_unmap(vma);
+			msm_gem_vma_unmap(vma, "close");
 			msm_gem_vma_close(vma);
 
 			if (obj) {