1/* SPDX-License-Identifier: MIT */
2/*
3 * Copyright © 2021 Intel Corporation
4 */
5
6#include <drm/drm_modeset_helper.h>
7#include <drm/ttm/ttm_bo.h>
8
9#include "intel_display_types.h"
10#include "intel_fb.h"
11#include "intel_fb_bo.h"
12#include "xe_bo.h"
13
14void intel_fb_bo_framebuffer_fini(struct drm_gem_object *obj)
15{
16 struct xe_bo *bo = gem_to_xe_bo(obj);
17
18 if (bo->flags & XE_BO_FLAG_PINNED) {
19 /* Unpin our kernel fb first */
20 xe_bo_lock(bo, false);
21 xe_bo_unpin(bo);
22 xe_bo_unlock(bo);
23 }
24 xe_bo_put(bo);
25}
26
27int intel_fb_bo_framebuffer_init(struct drm_gem_object *obj,
28 struct drm_mode_fb_cmd2 *mode_cmd)
29{
30 struct xe_bo *bo = gem_to_xe_bo(obj);
31 struct xe_device *xe = to_xe_device(bo->ttm.base.dev);
32 int ret;
33
34 /*
35 * Some modifiers require physical alignment of 64KiB VRAM pages;
36 * require that the BO in those cases is created correctly.
37 */
38 if (XE_IOCTL_DBG(xe, intel_fb_needs_64k_phys(mode_cmd->modifier[0]) &&
39 !(bo->flags & XE_BO_FLAG_NEEDS_64K)))
40 return -EINVAL;
41
42 xe_bo_get(bo);
43
44 ret = ttm_bo_reserve(bo: &bo->ttm, interruptible: true, no_wait: false, NULL);
45 if (ret)
46 goto err;
47
48 if (!(bo->flags & XE_BO_FLAG_SCANOUT)) {
49 /*
50 * XE_BO_FLAG_SCANOUT should ideally be set at creation, or is
51 * automatically set when creating FB. We cannot change caching
52 * mode when the bo is VM_BINDed, so we can only set
53 * coherency with display when unbound.
54 */
55 if (XE_IOCTL_DBG(xe, xe_bo_is_vm_bound(bo))) {
56 ttm_bo_unreserve(bo: &bo->ttm);
57 ret = -EINVAL;
58 goto err;
59 }
60 bo->flags |= XE_BO_FLAG_SCANOUT;
61 }
62 ttm_bo_unreserve(bo: &bo->ttm);
63 return 0;
64
65err:
66 xe_bo_put(bo);
67 return ret;
68}
69
70struct drm_gem_object *intel_fb_bo_lookup_valid_bo(struct drm_device *drm,
71 struct drm_file *filp,
72 const struct drm_mode_fb_cmd2 *mode_cmd)
73{
74 struct xe_device *xe = to_xe_device(drm);
75 struct xe_bo *bo;
76 struct drm_gem_object *gem = drm_gem_object_lookup(filp, handle: mode_cmd->handles[0]);
77
78 if (!gem)
79 return ERR_PTR(error: -ENOENT);
80
81 bo = gem_to_xe_bo(gem);
82 /* Require vram placement or dma-buf import */
83 if (IS_DGFX(xe) &&
84 !xe_bo_can_migrate(bo, XE_PL_VRAM0) &&
85 bo->ttm.type != ttm_bo_type_sg) {
86 drm_gem_object_put(obj: gem);
87 return ERR_PTR(error: -EREMOTE);
88 }
89
90 return gem;
91}
92

source code of linux/drivers/gpu/drm/xe/display/intel_fb_bo.c