1*4882a593Smuzhiyun // SPDX-License-Identifier: GPL-2.0-or-later
2*4882a593Smuzhiyun
3*4882a593Smuzhiyun #include <linux/module.h>
4*4882a593Smuzhiyun
5*4882a593Smuzhiyun #include <drm/drm_gem_ttm_helper.h>
6*4882a593Smuzhiyun
7*4882a593Smuzhiyun /**
8*4882a593Smuzhiyun * DOC: overview
9*4882a593Smuzhiyun *
10*4882a593Smuzhiyun * This library provides helper functions for gem objects backed by
11*4882a593Smuzhiyun * ttm.
12*4882a593Smuzhiyun */
13*4882a593Smuzhiyun
14*4882a593Smuzhiyun /**
15*4882a593Smuzhiyun * drm_gem_ttm_print_info() - Print &ttm_buffer_object info for debugfs
16*4882a593Smuzhiyun * @p: DRM printer
17*4882a593Smuzhiyun * @indent: Tab indentation level
18*4882a593Smuzhiyun * @gem: GEM object
19*4882a593Smuzhiyun *
20*4882a593Smuzhiyun * This function can be used as &drm_gem_object_funcs.print_info
21*4882a593Smuzhiyun * callback.
22*4882a593Smuzhiyun */
drm_gem_ttm_print_info(struct drm_printer * p,unsigned int indent,const struct drm_gem_object * gem)23*4882a593Smuzhiyun void drm_gem_ttm_print_info(struct drm_printer *p, unsigned int indent,
24*4882a593Smuzhiyun const struct drm_gem_object *gem)
25*4882a593Smuzhiyun {
26*4882a593Smuzhiyun static const char * const plname[] = {
27*4882a593Smuzhiyun [ TTM_PL_SYSTEM ] = "system",
28*4882a593Smuzhiyun [ TTM_PL_TT ] = "tt",
29*4882a593Smuzhiyun [ TTM_PL_VRAM ] = "vram",
30*4882a593Smuzhiyun [ TTM_PL_PRIV ] = "priv",
31*4882a593Smuzhiyun
32*4882a593Smuzhiyun [ 16 ] = "cached",
33*4882a593Smuzhiyun [ 17 ] = "uncached",
34*4882a593Smuzhiyun [ 18 ] = "wc",
35*4882a593Smuzhiyun [ 19 ] = "contig",
36*4882a593Smuzhiyun
37*4882a593Smuzhiyun [ 21 ] = "pinned", /* NO_EVICT */
38*4882a593Smuzhiyun [ 22 ] = "topdown",
39*4882a593Smuzhiyun };
40*4882a593Smuzhiyun const struct ttm_buffer_object *bo = drm_gem_ttm_of_gem(gem);
41*4882a593Smuzhiyun
42*4882a593Smuzhiyun drm_printf_indent(p, indent, "placement=");
43*4882a593Smuzhiyun drm_print_bits(p, bo->mem.placement, plname, ARRAY_SIZE(plname));
44*4882a593Smuzhiyun drm_printf(p, "\n");
45*4882a593Smuzhiyun
46*4882a593Smuzhiyun if (bo->mem.bus.is_iomem)
47*4882a593Smuzhiyun drm_printf_indent(p, indent, "bus.offset=%lx\n",
48*4882a593Smuzhiyun (unsigned long)bo->mem.bus.offset);
49*4882a593Smuzhiyun }
50*4882a593Smuzhiyun EXPORT_SYMBOL(drm_gem_ttm_print_info);
51*4882a593Smuzhiyun
52*4882a593Smuzhiyun /**
53*4882a593Smuzhiyun * drm_gem_ttm_mmap() - mmap &ttm_buffer_object
54*4882a593Smuzhiyun * @gem: GEM object.
55*4882a593Smuzhiyun * @vma: vm area.
56*4882a593Smuzhiyun *
57*4882a593Smuzhiyun * This function can be used as &drm_gem_object_funcs.mmap
58*4882a593Smuzhiyun * callback.
59*4882a593Smuzhiyun */
drm_gem_ttm_mmap(struct drm_gem_object * gem,struct vm_area_struct * vma)60*4882a593Smuzhiyun int drm_gem_ttm_mmap(struct drm_gem_object *gem,
61*4882a593Smuzhiyun struct vm_area_struct *vma)
62*4882a593Smuzhiyun {
63*4882a593Smuzhiyun struct ttm_buffer_object *bo = drm_gem_ttm_of_gem(gem);
64*4882a593Smuzhiyun int ret;
65*4882a593Smuzhiyun
66*4882a593Smuzhiyun ret = ttm_bo_mmap_obj(vma, bo);
67*4882a593Smuzhiyun if (ret < 0)
68*4882a593Smuzhiyun return ret;
69*4882a593Smuzhiyun
70*4882a593Smuzhiyun /*
71*4882a593Smuzhiyun * ttm has its own object refcounting, so drop gem reference
72*4882a593Smuzhiyun * to avoid double accounting counting.
73*4882a593Smuzhiyun */
74*4882a593Smuzhiyun drm_gem_object_put(gem);
75*4882a593Smuzhiyun
76*4882a593Smuzhiyun return 0;
77*4882a593Smuzhiyun }
78*4882a593Smuzhiyun EXPORT_SYMBOL(drm_gem_ttm_mmap);
79*4882a593Smuzhiyun
80*4882a593Smuzhiyun MODULE_DESCRIPTION("DRM gem ttm helpers");
81*4882a593Smuzhiyun MODULE_LICENSE("GPL");
82