tjh.dev
Linux kernel mirror (for testing)
git.kernel.org/pub/scm/linux/kernel/git/torvalds/linux.git
kernel
os
linux
1/* SPDX-License-Identifier: MIT */
2/*
3 * Copyright © 2021 Intel Corporation
4 */
5
6#include <drm/drm_modeset_helper.h>
7
8#include "i915_drv.h"
9#include "intel_display_types.h"
10#include "intel_fb_bo.h"
11
12void intel_fb_bo_framebuffer_fini(struct xe_bo *bo)
13{
14 if (bo->flags & XE_BO_FLAG_PINNED) {
15 /* Unpin our kernel fb first */
16 xe_bo_lock(bo, false);
17 xe_bo_unpin(bo);
18 xe_bo_unlock(bo);
19 }
20 xe_bo_put(bo);
21}
22
23int intel_fb_bo_framebuffer_init(struct intel_framebuffer *intel_fb,
24 struct xe_bo *bo,
25 struct drm_mode_fb_cmd2 *mode_cmd)
26{
27 struct drm_i915_private *i915 = to_i915(bo->ttm.base.dev);
28 int ret;
29
30 xe_bo_get(bo);
31
32 ret = ttm_bo_reserve(&bo->ttm, true, false, NULL);
33 if (ret)
34 goto err;
35
36 if (!(bo->flags & XE_BO_FLAG_SCANOUT)) {
37 /*
38 * XE_BO_FLAG_SCANOUT should ideally be set at creation, or is
39 * automatically set when creating FB. We cannot change caching
40 * mode when the boect is VM_BINDed, so we can only set
41 * coherency with display when unbound.
42 */
43 if (XE_IOCTL_DBG(i915, !list_empty(&bo->ttm.base.gpuva.list))) {
44 ttm_bo_unreserve(&bo->ttm);
45 ret = -EINVAL;
46 goto err;
47 }
48 bo->flags |= XE_BO_FLAG_SCANOUT;
49 }
50 ttm_bo_unreserve(&bo->ttm);
51 return 0;
52
53err:
54 xe_bo_put(bo);
55 return ret;
56}
57
58struct xe_bo *intel_fb_bo_lookup_valid_bo(struct drm_i915_private *i915,
59 struct drm_file *filp,
60 const struct drm_mode_fb_cmd2 *mode_cmd)
61{
62 struct drm_i915_gem_object *bo;
63 struct drm_gem_object *gem = drm_gem_object_lookup(filp, mode_cmd->handles[0]);
64
65 if (!gem)
66 return ERR_PTR(-ENOENT);
67
68 bo = gem_to_xe_bo(gem);
69 /* Require vram placement or dma-buf import */
70 if (IS_DGFX(i915) &&
71 !xe_bo_can_migrate(gem_to_xe_bo(gem), XE_PL_VRAM0) &&
72 bo->ttm.type != ttm_bo_type_sg) {
73 drm_gem_object_put(gem);
74 return ERR_PTR(-EREMOTE);
75 }
76
77 return bo;
78}