119 строки
2.8 KiB
C
119 строки
2.8 KiB
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.offset=%lx\n",
|
|
(unsigned long)bo->mem.bus.offset);
|
|
}
|
|
EXPORT_SYMBOL(drm_gem_ttm_print_info);
|
|
|
|
/**
|
|
* drm_gem_ttm_vmap() - vmap &ttm_buffer_object
|
|
* @gem: GEM object.
|
|
* @map: [out] returns the dma-buf mapping.
|
|
*
|
|
* Maps a GEM object with ttm_bo_vmap(). This function can be used as
|
|
* &drm_gem_object_funcs.vmap callback.
|
|
*
|
|
* Returns:
|
|
* 0 on success, or a negative errno code otherwise.
|
|
*/
|
|
int drm_gem_ttm_vmap(struct drm_gem_object *gem,
|
|
struct dma_buf_map *map)
|
|
{
|
|
struct ttm_buffer_object *bo = drm_gem_ttm_of_gem(gem);
|
|
|
|
return ttm_bo_vmap(bo, map);
|
|
}
|
|
EXPORT_SYMBOL(drm_gem_ttm_vmap);
|
|
|
|
/**
|
|
* drm_gem_ttm_vunmap() - vunmap &ttm_buffer_object
|
|
* @gem: GEM object.
|
|
* @map: dma-buf mapping.
|
|
*
|
|
* Unmaps a GEM object with ttm_bo_vunmap(). This function can be used as
|
|
* &drm_gem_object_funcs.vmap callback.
|
|
*/
|
|
void drm_gem_ttm_vunmap(struct drm_gem_object *gem,
|
|
struct dma_buf_map *map)
|
|
{
|
|
struct ttm_buffer_object *bo = drm_gem_ttm_of_gem(gem);
|
|
|
|
ttm_bo_vunmap(bo, map);
|
|
}
|
|
EXPORT_SYMBOL(drm_gem_ttm_vunmap);
|
|
|
|
/**
|
|
* 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(gem);
|
|
|
|
return 0;
|
|
}
|
|
EXPORT_SYMBOL(drm_gem_ttm_mmap);
|
|
|
|
MODULE_DESCRIPTION("DRM gem ttm helpers");
|
|
MODULE_LICENSE("GPL");
|