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- // 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_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");
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