drm/exynos: gem code cleanup

This cleans codes of exynos gem - indents and order function and so on.

Signed-off-by: Joonyoung Shim <jy0922.shim@samsung.com>
Signed-off-by: Inki Dae <inki.dae@samsung.com>
Signed-off-by: Kyungmin Park <kyungmin.park@samsung.com>

drivers/gpu/drm/exynos/exynos_drm_buf.c

@@ -73,7 +73,7 @@ struct exynos_drm_gem_buf *exynos_drm_buf_create(struct drm_device *dev,
 	buffer = kzalloc(sizeof(*buffer), GFP_KERNEL);
 	if (!buffer) {
 		DRM_ERROR("failed to allocate exynos_drm_gem_buf.\n");
-		return ERR_PTR(-ENOMEM);
+		return NULL;
 	}
 
 	buffer->size = size;
@@ -84,8 +84,7 @@ struct exynos_drm_gem_buf *exynos_drm_buf_create(struct drm_device *dev,
 	 */
 	if (lowlevel_buffer_allocate(dev, buffer) < 0) {
 		kfree(buffer);
-		buffer = NULL;
-		return ERR_PTR(-ENOMEM);
+		return NULL;
 	}
 
 	return buffer;

drivers/gpu/drm/exynos/exynos_drm_fb.c

@@ -150,8 +150,8 @@ exynos_drm_fb_init(struct drm_file *file_priv, struct drm_device *dev,
 			 * for default framebuffer.
 			 */
 			buffer = exynos_drm_buf_create(dev, size);
-			if (IS_ERR(buffer)) {
-				ret = PTR_ERR(buffer);
+			if (!buffer) {
+				ret = -ENOMEM;
 				goto err_buffer;
 			}
 

drivers/gpu/drm/exynos/exynos_drm_gem.c

@@ -62,10 +62,9 @@ static unsigned int get_gem_mmap_offset(struct drm_gem_object *obj)
 	return (unsigned int)obj->map_list.hash.key << PAGE_SHIFT;
 }
 
-static struct exynos_drm_gem_obj
-		*exynos_drm_gem_init(struct drm_device *drm_dev,
-			struct drm_file *file_priv, unsigned int *handle,
-			unsigned int size)
+static struct exynos_drm_gem_obj *
+exynos_drm_gem_init(struct drm_device *drm_dev, struct drm_file *file_priv,
+		    unsigned int *handle, unsigned int size)
 {
 	struct exynos_drm_gem_obj *exynos_gem_obj;
 	struct drm_gem_object *obj;
@@ -83,15 +82,15 @@ static struct exynos_drm_gem_obj
 	if (ret < 0) {
 		DRM_ERROR("failed to initialize gem object.\n");
 		ret = -EINVAL;
-		goto err_object_init;
+		goto err;
 	}
 
 	DRM_DEBUG_KMS("created file object = 0x%x\n", (unsigned int)obj->filp);
 
 	ret = drm_gem_create_mmap_offset(obj);
 	if (ret < 0) {
 		DRM_ERROR("failed to allocate mmap offset.\n");
-		goto err_create_mmap_offset;
+		goto err_release;
 	}
 
 	/*
@@ -100,7 +99,7 @@ static struct exynos_drm_gem_obj
 	 */
 	ret = drm_gem_handle_create(file_priv, obj, handle);
 	if (ret)
-		goto err_handle_create;
+		goto err_free_mmap_offset;
 
 	DRM_DEBUG_KMS("gem handle = 0x%x\n", *handle);
 
@@ -109,34 +108,32 @@ static struct exynos_drm_gem_obj
 
 	return exynos_gem_obj;
 
-err_handle_create:
+err_free_mmap_offset:
 	drm_gem_free_mmap_offset(obj);
 
-err_create_mmap_offset:
+err_release:
 	drm_gem_object_release(obj);
 
-err_object_init:
+err:
 	kfree(exynos_gem_obj);
-
 	return ERR_PTR(ret);
 }
 
 struct exynos_drm_gem_obj *exynos_drm_gem_create(struct drm_device *dev,
-				struct drm_file *file_priv,
-				unsigned int *handle, unsigned long size)
+						 struct drm_file *file_priv,
+						 unsigned int *handle,
+						 unsigned long size)
 {
 
-	struct exynos_drm_gem_obj *exynos_gem_obj = NULL;
+	struct exynos_drm_gem_obj *exynos_gem_obj;
 	struct exynos_drm_gem_buf *buffer;
 
 	size = roundup(size, PAGE_SIZE);
-
 	DRM_DEBUG_KMS("%s: size = 0x%lx\n", __FILE__, size);
 
 	buffer = exynos_drm_buf_create(dev, size);
-	if (IS_ERR(buffer)) {
-		return ERR_CAST(buffer);
-	}
+	if (!buffer)
+		return ERR_PTR(-ENOMEM);
 
 	exynos_gem_obj = exynos_drm_gem_init(dev, file_priv, handle, size);
 	if (IS_ERR(exynos_gem_obj)) {
@@ -150,23 +147,23 @@ struct exynos_drm_gem_obj *exynos_drm_gem_create(struct drm_device *dev,
 }
 
 int exynos_drm_gem_create_ioctl(struct drm_device *dev, void *data,
-					struct drm_file *file_priv)
+				struct drm_file *file_priv)
 {
 	struct drm_exynos_gem_create *args = data;
-	struct exynos_drm_gem_obj *exynos_gem_obj = NULL;
+	struct exynos_drm_gem_obj *exynos_gem_obj;
 
 	DRM_DEBUG_KMS("%s\n", __FILE__);
 
-	exynos_gem_obj = exynos_drm_gem_create(dev, file_priv,
-						&args->handle, args->size);
+	exynos_gem_obj = exynos_drm_gem_create(dev, file_priv, &args->handle,
+			args->size);
 	if (IS_ERR(exynos_gem_obj))
 		return PTR_ERR(exynos_gem_obj);
 
 	return 0;
 }
 
 int exynos_drm_gem_map_offset_ioctl(struct drm_device *dev, void *data,
-		struct drm_file *file_priv)
+				    struct drm_file *file_priv)
 {
 	struct drm_exynos_gem_map_off *args = data;
 
@@ -185,7 +182,7 @@ int exynos_drm_gem_map_offset_ioctl(struct drm_device *dev, void *data,
 }
 
 static int exynos_drm_gem_mmap_buffer(struct file *filp,
-		struct vm_area_struct *vma)
+				      struct vm_area_struct *vma)
 {
 	struct drm_gem_object *obj = filp->private_data;
 	struct exynos_drm_gem_obj *exynos_gem_obj = to_exynos_gem_obj(obj);
@@ -232,7 +229,7 @@ static const struct file_operations exynos_drm_gem_fops = {
 };
 
 int exynos_drm_gem_mmap_ioctl(struct drm_device *dev, void *data,
-		struct drm_file *file_priv)
+			      struct drm_file *file_priv)
 {
 	struct drm_exynos_gem_mmap *args = data;
 	struct drm_gem_object *obj;
@@ -278,30 +275,31 @@ int exynos_drm_gem_init_object(struct drm_gem_object *obj)
 	return 0;
 }
 
-void exynos_drm_gem_free_object(struct drm_gem_object *gem_obj)
+void exynos_drm_gem_free_object(struct drm_gem_object *obj)
 {
 	struct exynos_drm_gem_obj *exynos_gem_obj;
 
 	DRM_DEBUG_KMS("%s\n", __FILE__);
 
 	DRM_DEBUG_KMS("handle count = %d\n",
-			atomic_read(&gem_obj->handle_count));
+			atomic_read(&obj->handle_count));
 
-	if (gem_obj->map_list.map)
-		drm_gem_free_mmap_offset(gem_obj);
+	if (obj->map_list.map)
+		drm_gem_free_mmap_offset(obj);
 
 	/* release file pointer to gem object. */
-	drm_gem_object_release(gem_obj);
+	drm_gem_object_release(obj);
 
-	exynos_gem_obj = to_exynos_gem_obj(gem_obj);
+	exynos_gem_obj = to_exynos_gem_obj(obj);
 
-	exynos_drm_buf_destroy(gem_obj->dev, exynos_gem_obj->buffer);
+	exynos_drm_buf_destroy(obj->dev, exynos_gem_obj->buffer);
 
 	kfree(exynos_gem_obj);
 }
 
 int exynos_drm_gem_dumb_create(struct drm_file *file_priv,
-		struct drm_device *dev, struct drm_mode_create_dumb *args)
+			       struct drm_device *dev,
+			       struct drm_mode_create_dumb *args)
 {
 	struct exynos_drm_gem_obj *exynos_gem_obj;
 
@@ -317,15 +315,16 @@ int exynos_drm_gem_dumb_create(struct drm_file *file_priv,
 	args->size = args->pitch * args->height;
 
 	exynos_gem_obj = exynos_drm_gem_create(dev, file_priv, &args->handle,
-							args->size);
+			args->size);
 	if (IS_ERR(exynos_gem_obj))
 		return PTR_ERR(exynos_gem_obj);
 
 	return 0;
 }
 
 int exynos_drm_gem_dumb_map_offset(struct drm_file *file_priv,
-		struct drm_device *dev, uint32_t handle, uint64_t *offset)
+				   struct drm_device *dev, uint32_t handle,
+				   uint64_t *offset)
 {
 	struct exynos_drm_gem_obj *exynos_gem_obj;
 	struct drm_gem_object *obj;
@@ -360,6 +359,28 @@ int exynos_drm_gem_dumb_map_offset(struct drm_file *file_priv,
 	return 0;
 }
 
+int exynos_drm_gem_dumb_destroy(struct drm_file *file_priv,
+				struct drm_device *dev,
+				unsigned int handle)
+{
+	int ret;
+
+	DRM_DEBUG_KMS("%s\n", __FILE__);
+
+	/*
+	 * obj->refcount and obj->handle_count are decreased and
+	 * if both them are 0 then exynos_drm_gem_free_object()
+	 * would be called by callback to release resources.
+	 */
+	ret = drm_gem_handle_delete(file_priv, handle);
+	if (ret < 0) {
+		DRM_ERROR("failed to delete drm_gem_handle.\n");
+		return ret;
+	}
+
+	return 0;
+}
+
 int exynos_drm_gem_fault(struct vm_area_struct *vma, struct vm_fault *vmf)
 {
 	struct drm_gem_object *obj = vma->vm_private_data;
@@ -403,28 +424,6 @@ int exynos_drm_gem_mmap(struct file *filp, struct vm_area_struct *vma)
 	return ret;
 }
 
-
-int exynos_drm_gem_dumb_destroy(struct drm_file *file_priv,
-		struct drm_device *dev, unsigned int handle)
-{
-	int ret;
-
-	DRM_DEBUG_KMS("%s\n", __FILE__);
-
-	/*
-	 * obj->refcount and obj->handle_count are decreased and
-	 * if both them are 0 then exynos_drm_gem_free_object()
-	 * would be called by callback to release resources.
-	 */
-	ret = drm_gem_handle_delete(file_priv, handle);
-	if (ret < 0) {
-		DRM_ERROR("failed to delete drm_gem_handle.\n");
-		return ret;
-	}
-
-	return 0;
-}
-
 MODULE_AUTHOR("Inki Dae <inki.dae@samsung.com>");
 MODULE_DESCRIPTION("Samsung SoC DRM GEM Module");
 MODULE_LICENSE("GPL");

drivers/gpu/drm/exynos/exynos_drm_gem.h

@@ -60,30 +60,34 @@ struct exynos_drm_gem_buf {
  *	user can access the buffer through kms_bo.handle.
  */
 struct exynos_drm_gem_obj {
-	struct drm_gem_object base;
-	struct exynos_drm_gem_buf *buffer;
+	struct drm_gem_object		base;
+	struct exynos_drm_gem_buf	*buffer;
 };
 
 /* create a new buffer and get a new gem handle. */
 struct exynos_drm_gem_obj *exynos_drm_gem_create(struct drm_device *dev,
-		struct drm_file *file_priv,
-		unsigned int *handle, unsigned long size);
+						 struct drm_file *file_priv,
+						 unsigned int *handle,
+						 unsigned long size);
 
 /*
  * request gem object creation and buffer allocation as the size
  * that it is calculated with framebuffer information such as width,
  * height and bpp.
  */
 int exynos_drm_gem_create_ioctl(struct drm_device *dev, void *data,
-		struct drm_file *file_priv);
+				struct drm_file *file_priv);
 
 /* get buffer offset to map to user space. */
 int exynos_drm_gem_map_offset_ioctl(struct drm_device *dev, void *data,
-		struct drm_file *file_priv);
+				    struct drm_file *file_priv);
 
-/* unmap a buffer from user space. */
-int exynos_drm_gem_munmap_ioctl(struct drm_device *dev, void *data,
-		struct drm_file *file_priv);
+/*
+ * mmap the physically continuous memory that a gem object contains
+ * to user space.
+ */
+int exynos_drm_gem_mmap_ioctl(struct drm_device *dev, void *data,
+			      struct drm_file *file_priv);
 
 /* initialize gem object. */
 int exynos_drm_gem_init_object(struct drm_gem_object *obj);
@@ -93,31 +97,27 @@ void exynos_drm_gem_free_object(struct drm_gem_object *gem_obj);
 
 /* create memory region for drm framebuffer. */
 int exynos_drm_gem_dumb_create(struct drm_file *file_priv,
-		struct drm_device *dev, struct drm_mode_create_dumb *args);
+			       struct drm_device *dev,
+			       struct drm_mode_create_dumb *args);
 
 /* map memory region for drm framebuffer to user space. */
 int exynos_drm_gem_dumb_map_offset(struct drm_file *file_priv,
-		struct drm_device *dev, uint32_t handle, uint64_t *offset);
-
-/* page fault handler and mmap fault address(virtual) to physical memory. */
-int exynos_drm_gem_fault(struct vm_area_struct *vma, struct vm_fault *vmf);
-
-/*
- * mmap the physically continuous memory that a gem object contains
- * to user space.
- */
-int exynos_drm_gem_mmap_ioctl(struct drm_device *dev, void *data,
-		struct drm_file *file_priv);
-
-/* set vm_flags and we can change the vm attribute to other one at here. */
-int exynos_drm_gem_mmap(struct file *filp, struct vm_area_struct *vma);
+				   struct drm_device *dev, uint32_t handle,
+				   uint64_t *offset);
 
 /*
  * destroy memory region allocated.
  *	- a gem handle and physical memory region pointed by a gem object
  *	would be released by drm_gem_handle_delete().
  */
 int exynos_drm_gem_dumb_destroy(struct drm_file *file_priv,
-		struct drm_device *dev, unsigned int handle);
+				struct drm_device *dev,
+				unsigned int handle);
+
+/* page fault handler and mmap fault address(virtual) to physical memory. */
+int exynos_drm_gem_fault(struct vm_area_struct *vma, struct vm_fault *vmf);
+
+/* set vm_flags and we can change the vm attribute to other one at here. */
+int exynos_drm_gem_mmap(struct file *filp, struct vm_area_struct *vma);
 
 #endif