[mirror_ubuntu-jammy-kernel.git] / drivers / gpu / drm / drm_gem_ttm_helper.c

// SPDX-License-Identifier: GPL-2.0-or-later

#include <linux/module.h>

#include <drm/drm_gem_ttm_helper.h>

/**
 * DOC: overview
 *
 * This library provides helper functions for gem objects backed by
 * ttm.
 */

/**
 * drm_gem_ttm_print_info() - Print &ttm_buffer_object info for debugfs
 * @p: DRM printer
 * @indent: Tab indentation level
 * @gem: GEM object
 *
 * This function can be used as &drm_gem_object_funcs.print_info
 * callback.
 */
void drm_gem_ttm_print_info(struct drm_printer *p, unsigned int indent,
			    const struct drm_gem_object *gem)
{
	static const char * const plname[] = {
		[ TTM_PL_SYSTEM ] = "system",
		[ TTM_PL_TT     ] = "tt",
		[ TTM_PL_VRAM   ] = "vram",
		[ TTM_PL_PRIV   ] = "priv",

		[ 16 ]            = "cached",
		[ 17 ]            = "uncached",
		[ 18 ]            = "wc",
		[ 19 ]            = "contig",

		[ 21 ]            = "pinned", /* NO_EVICT */
		[ 22 ]            = "topdown",
	};
	const struct ttm_buffer_object *bo = drm_gem_ttm_of_gem(gem);

	drm_printf_indent(p, indent, "placement=");
	drm_print_bits(p, bo->mem.placement, plname, ARRAY_SIZE(plname));
	drm_printf(p, "\n");

	if (bo->mem.bus.is_iomem) {
		drm_printf_indent(p, indent, "bus.base=%lx\n",
				  (unsigned long)bo->mem.bus.base);
		drm_printf_indent(p, indent, "bus.offset=%lx\n",
				  (unsigned long)bo->mem.bus.offset);
	}
}
EXPORT_SYMBOL(drm_gem_ttm_print_info);

/**
 * drm_gem_ttm_mmap() - mmap &ttm_buffer_object
 * @gem: GEM object.
 * @vma: vm area.
 *
 * This function can be used as &drm_gem_object_funcs.mmap
 * callback.
 */
int drm_gem_ttm_mmap(struct drm_gem_object *gem,
		     struct vm_area_struct *vma)
{
	struct ttm_buffer_object *bo = drm_gem_ttm_of_gem(gem);
	int ret;

	ret = ttm_bo_mmap_obj(vma, bo);
	if (ret < 0)
		return ret;

	/*
	 * ttm has its own object refcounting, so drop gem reference
	 * to avoid double accounting counting.
	 */
	drm_gem_object_put_unlocked(gem);

	return 0;
}
EXPORT_SYMBOL(drm_gem_ttm_mmap);

MODULE_DESCRIPTION("DRM gem ttm helpers");
MODULE_LICENSE("GPL");
Commit	Line	Data
ff540b76 GH	1	// SPDX-License-Identifier: GPL-2.0-or-later
	2
	3	#include <linux/module.h>
	4
	5	#include <drm/drm_gem_ttm_helper.h>
	6
	7	/**
	8	* DOC: overview
	9	*
	10	* This library provides helper functions for gem objects backed by
	11	* ttm.
	12	*/
	13
	14	/**
	15	* drm_gem_ttm_print_info() - Print &ttm_buffer_object info for debugfs
	16	* @p: DRM printer
	17	* @indent: Tab indentation level
	18	* @gem: GEM object
	19	*
	20	* This function can be used as &drm_gem_object_funcs.print_info
	21	* callback.
	22	*/
	23	void drm_gem_ttm_print_info(struct drm_printer *p, unsigned int indent,
	24	const struct drm_gem_object *gem)
	25	{
141f6357	26	static const char * const plname[] = {
ff540b76 GH	27	[ TTM_PL_SYSTEM ] = "system",
	28	[ TTM_PL_TT ] = "tt",
	29	[ TTM_PL_VRAM ] = "vram",
	30	[ TTM_PL_PRIV ] = "priv",
	31
	32	[ 16 ] = "cached",
	33	[ 17 ] = "uncached",
	34	[ 18 ] = "wc",
	35	[ 19 ] = "contig",
	36
	37	[ 21 ] = "pinned", /* NO_EVICT */
	38	[ 22 ] = "topdown",
	39	};
	40	const struct ttm_buffer_object *bo = drm_gem_ttm_of_gem(gem);
	41
	42	drm_printf_indent(p, indent, "placement=");
141f6357	43	drm_print_bits(p, bo->mem.placement, plname, ARRAY_SIZE(plname));
ff540b76 GH	44	drm_printf(p, "\n");
	45
	46	if (bo->mem.bus.is_iomem) {
	47	drm_printf_indent(p, indent, "bus.base=%lx\n",
	48	(unsigned long)bo->mem.bus.base);
	49	drm_printf_indent(p, indent, "bus.offset=%lx\n",
	50	(unsigned long)bo->mem.bus.offset);
	51	}
	52	}
	53	EXPORT_SYMBOL(drm_gem_ttm_print_info);
	54
231927d9 GH	55	/**
	56	* drm_gem_ttm_mmap() - mmap &ttm_buffer_object
	57	* @gem: GEM object.
	58	* @vma: vm area.
	59	*
	60	* This function can be used as &drm_gem_object_funcs.mmap
	61	* callback.
	62	*/
	63	int drm_gem_ttm_mmap(struct drm_gem_object *gem,
	64	struct vm_area_struct *vma)
	65	{
	66	struct ttm_buffer_object *bo = drm_gem_ttm_of_gem(gem);
9786b65b	67	int ret;
231927d9	68
9786b65b GH	69	ret = ttm_bo_mmap_obj(vma, bo);
	70	if (ret < 0)
	71	return ret;
	72
	73	/*
	74	* ttm has its own object refcounting, so drop gem reference
	75	* to avoid double accounting counting.
	76	*/
	77	drm_gem_object_put_unlocked(gem);
	78
	79	return 0;
231927d9 GH	80	}
	81	EXPORT_SYMBOL(drm_gem_ttm_mmap);
	82
ff540b76 GH	83	MODULE_DESCRIPTION("DRM gem ttm helpers");
ff540b76 GH	84	MODULE_LICENSE("GPL");