1 files changed, 38 insertions, 83 deletions

diff --git a/drivers/gpu/drm/drm_gem_cma_helper.c b/drivers/gpu/drm/drm_gem_cma_helper.c
index 6a4ef335ebc9..7942cf05cd93 100644
--- a/drivers/gpu/drm/drm_gem_cma_helper.c
+++ b/drivers/gpu/drm/drm_gem_cma_helper.c
@@ -38,6 +38,7 @@ static const struct drm_gem_object_funcs drm_gem_cma_default_funcs = {
 	.print_info = drm_gem_cma_print_info,
 	.get_sg_table = drm_gem_cma_get_sg_table,
 	.vmap = drm_gem_cma_vmap,
+	.mmap = drm_gem_cma_mmap,
 	.vm_ops = &drm_gem_cma_vm_ops,
 };
 
@@ -277,62 +278,6 @@ const struct vm_operations_struct drm_gem_cma_vm_ops = {
 };
 EXPORT_SYMBOL_GPL(drm_gem_cma_vm_ops);
 
-static int drm_gem_cma_mmap_obj(struct drm_gem_cma_object *cma_obj,
-				struct vm_area_struct *vma)
-{
-	int ret;
-
-	/*
-	 * Clear the VM_PFNMAP flag that was set by drm_gem_mmap(), and set the
-	 * vm_pgoff (used as a fake buffer offset by DRM) to 0 as we want to map
-	 * the whole buffer.
-	 */
-	vma->vm_flags &= ~VM_PFNMAP;
-	vma->vm_pgoff = 0;
-
-	ret = dma_mmap_wc(cma_obj->base.dev->dev, vma, cma_obj->vaddr,
-			  cma_obj->paddr, vma->vm_end - vma->vm_start);
-	if (ret)
-		drm_gem_vm_close(vma);
-
-	return ret;
-}
-
-/**
- * drm_gem_cma_mmap - memory-map a CMA GEM object
- * @filp: file object
- * @vma: VMA for the area to be mapped
- *
- * This function implements an augmented version of the GEM DRM file mmap
- * operation for CMA objects: In addition to the usual GEM VMA setup it
- * immediately faults in the entire object instead of using on-demaind
- * faulting. Drivers which employ the CMA helpers should use this function
- * as their ->mmap() handler in the DRM device file's file_operations
- * structure.
- *
- * Instead of directly referencing this function, drivers should use the
- * DEFINE_DRM_GEM_CMA_FOPS().macro.
- *
- * Returns:
- * 0 on success or a negative error code on failure.
- */
-int drm_gem_cma_mmap(struct file *filp, struct vm_area_struct *vma)
-{
-	struct drm_gem_cma_object *cma_obj;
-	struct drm_gem_object *gem_obj;
-	int ret;
-
-	ret = drm_gem_mmap(filp, vma);
-	if (ret)
-		return ret;
-
-	gem_obj = vma->vm_private_data;
-	cma_obj = to_drm_gem_cma_obj(gem_obj);
-
-	return drm_gem_cma_mmap_obj(cma_obj, vma);
-}
-EXPORT_SYMBOL_GPL(drm_gem_cma_mmap);
-
 #ifndef CONFIG_MMU
 /**
  * drm_gem_cma_get_unmapped_area - propose address for mapping in noMMU cases
@@ -501,33 +446,6 @@ drm_gem_cma_prime_import_sg_table(struct drm_device *dev,
 EXPORT_SYMBOL_GPL(drm_gem_cma_prime_import_sg_table);
 
 /**
- * drm_gem_cma_prime_mmap - memory-map an exported CMA GEM object
- * @obj: GEM object
- * @vma: VMA for the area to be mapped
- *
- * This function maps a buffer imported via DRM PRIME into a userspace
- * process's address space. Drivers that use the CMA helpers should set this
- * as their &drm_driver.gem_prime_mmap callback.
- *
- * Returns:
- * 0 on success or a negative error code on failure.
- */
-int drm_gem_cma_prime_mmap(struct drm_gem_object *obj,
-			   struct vm_area_struct *vma)
-{
-	struct drm_gem_cma_object *cma_obj;
-	int ret;
-
-	ret = drm_gem_mmap_obj(obj, obj->size, vma);
-	if (ret < 0)
-		return ret;
-
-	cma_obj = to_drm_gem_cma_obj(obj);
-	return drm_gem_cma_mmap_obj(cma_obj, vma);
-}
-EXPORT_SYMBOL_GPL(drm_gem_cma_prime_mmap);
-
-/**
  * drm_gem_cma_vmap - map a CMA GEM object into the kernel's virtual
  *     address space
  * @obj: GEM object
@@ -554,6 +472,43 @@ int drm_gem_cma_vmap(struct drm_gem_object *obj, struct dma_buf_map *map)
 EXPORT_SYMBOL_GPL(drm_gem_cma_vmap);
 
 /**
+ * drm_gem_cma_mmap - memory-map an exported CMA GEM object
+ * @obj: GEM object
+ * @vma: VMA for the area to be mapped
+ *
+ * This function maps a buffer into a userspace process's address space.
+ * In addition to the usual GEM VMA setup it immediately faults in the entire
+ * object instead of using on-demand faulting. Drivers that use the CMA
+ * helpers should set this as their &drm_gem_object_funcs.mmap callback.
+ *
+ * Returns:
+ * 0 on success or a negative error code on failure.
+ */
+int drm_gem_cma_mmap(struct drm_gem_object *obj, struct vm_area_struct *vma)
+{
+	struct drm_gem_cma_object *cma_obj;
+	int ret;
+
+	/*
+	 * Clear the VM_PFNMAP flag that was set by drm_gem_mmap(), and set the
+	 * vm_pgoff (used as a fake buffer offset by DRM) to 0 as we want to map
+	 * the whole buffer.
+	 */
+	vma->vm_pgoff -= drm_vma_node_start(&obj->vma_node);
+	vma->vm_flags &= ~VM_PFNMAP;
+
+	cma_obj = to_drm_gem_cma_obj(obj);
+
+	ret = dma_mmap_wc(cma_obj->base.dev->dev, vma, cma_obj->vaddr,
+			  cma_obj->paddr, vma->vm_end - vma->vm_start);
+	if (ret)
+		drm_gem_vm_close(vma);
+
+	return ret;
+}
+EXPORT_SYMBOL_GPL(drm_gem_cma_mmap);
+
+/**
  * drm_gem_cma_prime_import_sg_table_vmap - PRIME import another driver's
  *	scatter/gather table and get the virtual address of the buffer
  * @dev: DRM device