drm: Add drm_gem_vram_fill_create_dumb() to create dumb buffers (fed1eec0) · Commits · 戴 / test

drivers/gpu/drm/drm_gem_vram_helper.c

+62 −0

Original line number	Diff line number	Diff line
		// SPDX-License-Identifier: GPL-2.0-or-later

		#include <drm/drm_gem_vram_helper.h>
		#include <drm/drm_mode.h>
		#include <drm/ttm/ttm_page_alloc.h>

		/**
		@@ -411,6 +412,67 @@ void drm_gem_vram_kunmap(struct drm_gem_vram_object *gbo)
		}
		EXPORT_SYMBOL(drm_gem_vram_kunmap);

		/**
		* drm_gem_vram_fill_create_dumb() - \
		Helper for implementing &struct drm_driver.dumb_create
		* @file: the DRM file
		* @dev: the DRM device
		* @bdev: the TTM BO device managing the buffer object
		* @pg_align: the buffer's alignment in multiples of the page size
		* @interruptible: sleep interruptible if waiting for memory
		* @args: the arguments as provided to \
		&struct drm_driver.dumb_create
		*
		* This helper function fills &struct drm_mode_create_dumb, which is used
		* by &struct drm_driver.dumb_create. Implementations of this interface
		* should forwards their arguments to this helper, plus the driver-specific
		* parameters.
		*
		* Returns:
		* 0 on success, or
		* a negative error code otherwise.
		*/
		int drm_gem_vram_fill_create_dumb(struct drm_file *file,
		struct drm_device *dev,
		struct ttm_bo_device *bdev,
		unsigned long pg_align,
		bool interruptible,
		struct drm_mode_create_dumb *args)
		{
		size_t pitch, size;
		struct drm_gem_vram_object *gbo;
		int ret;
		u32 handle;

		pitch = args->width * ((args->bpp + 7) / 8);
		size = pitch * args->height;

		size = roundup(size, PAGE_SIZE);
		if (!size)
		return -EINVAL;

		gbo = drm_gem_vram_create(dev, bdev, size, pg_align, interruptible);
		if (IS_ERR(gbo))
		return PTR_ERR(gbo);

		ret = drm_gem_handle_create(file, &gbo->gem, &handle);
		if (ret)
		goto err_drm_gem_object_put_unlocked;

		drm_gem_object_put_unlocked(&gbo->gem);

		args->pitch = pitch;
		args->size = size;
		args->handle = handle;

		return 0;

		err_drm_gem_object_put_unlocked:
		drm_gem_object_put_unlocked(&gbo->gem);
		return ret;
		}
		EXPORT_SYMBOL(drm_gem_vram_fill_create_dumb);

		/*
		* Helpers for struct ttm_bo_driver
		*/

include/drm/drm_gem_vram_helper.h

+8 −0

Original line number	Diff line number	Diff line
		@@ -8,6 +8,7 @@
		#include <drm/ttm/ttm_placement.h>
		#include <linux/kernel.h> /* for container_of() */

		struct drm_mode_create_dumb;
		struct filp;

		#define DRM_GEM_VRAM_PL_FLAG_VRAM TTM_PL_FLAG_VRAM
		@@ -89,6 +90,13 @@ void drm_gem_vram_kunmap_at(struct drm_gem_vram_object *gbo,
		struct ttm_bo_kmap_obj *kmap);
		void drm_gem_vram_kunmap(struct drm_gem_vram_object *gbo);

		int drm_gem_vram_fill_create_dumb(struct drm_file *file,
		struct drm_device *dev,
		struct ttm_bo_device *bdev,
		unsigned long pg_align,
		bool interruptible,
		struct drm_mode_create_dumb *args);

		/*
		* Helpers for struct ttm_bo_driver
		*/

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