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231927d939
Add helper function to mmap ttm bo's using &drm_gem_object_funcs.mmap(). Note that with this code path access verification is done by drm_gem_mmap() (which calls drm_vma_node_is_allowed(()). The &ttm_bo_driver.verify_access() callback is is not used. v3: use ttm_bo_mmap_obj instead of ttm_bo_mmap_vma_setup Signed-off-by: Gerd Hoffmann <kraxel@redhat.com> Reviewed-by: Daniel Vetter <daniel.vetter@ffwll.ch> Link: http://patchwork.freedesktop.org/patch/msgid/20191016115203.20095-9-kraxel@redhat.com
73 lines
1.8 KiB
C
73 lines
1.8 KiB
C
// SPDX-License-Identifier: GPL-2.0-or-later
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#include <linux/module.h>
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#include <drm/drm_gem_ttm_helper.h>
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/**
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* DOC: overview
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*
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* This library provides helper functions for gem objects backed by
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* ttm.
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*/
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/**
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* drm_gem_ttm_print_info() - Print &ttm_buffer_object info for debugfs
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* @p: DRM printer
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* @indent: Tab indentation level
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* @gem: GEM object
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*
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* This function can be used as &drm_gem_object_funcs.print_info
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* callback.
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*/
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void drm_gem_ttm_print_info(struct drm_printer *p, unsigned int indent,
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const struct drm_gem_object *gem)
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{
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static const char * const plname[] = {
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[ TTM_PL_SYSTEM ] = "system",
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[ TTM_PL_TT ] = "tt",
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[ TTM_PL_VRAM ] = "vram",
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[ TTM_PL_PRIV ] = "priv",
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[ 16 ] = "cached",
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[ 17 ] = "uncached",
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[ 18 ] = "wc",
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[ 19 ] = "contig",
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[ 21 ] = "pinned", /* NO_EVICT */
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[ 22 ] = "topdown",
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};
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const struct ttm_buffer_object *bo = drm_gem_ttm_of_gem(gem);
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drm_printf_indent(p, indent, "placement=");
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drm_print_bits(p, bo->mem.placement, plname, ARRAY_SIZE(plname));
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drm_printf(p, "\n");
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if (bo->mem.bus.is_iomem) {
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drm_printf_indent(p, indent, "bus.base=%lx\n",
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(unsigned long)bo->mem.bus.base);
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drm_printf_indent(p, indent, "bus.offset=%lx\n",
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(unsigned long)bo->mem.bus.offset);
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}
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}
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EXPORT_SYMBOL(drm_gem_ttm_print_info);
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/**
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* drm_gem_ttm_mmap() - mmap &ttm_buffer_object
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* @gem: GEM object.
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* @vma: vm area.
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*
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* This function can be used as &drm_gem_object_funcs.mmap
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* callback.
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*/
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int drm_gem_ttm_mmap(struct drm_gem_object *gem,
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struct vm_area_struct *vma)
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{
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struct ttm_buffer_object *bo = drm_gem_ttm_of_gem(gem);
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return ttm_bo_mmap_obj(vma, bo);
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}
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EXPORT_SYMBOL(drm_gem_ttm_mmap);
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MODULE_DESCRIPTION("DRM gem ttm helpers");
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MODULE_LICENSE("GPL");
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