intel_fb_bo.c

 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->ttm, true, 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->ttm);
57			ret = -EINVAL;
58			goto err;
59		}
60		bo->flags |= XE_BO_FLAG_SCANOUT;
61	}
62	ttm_bo_unreserve(&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, mode_cmd->handles[0]);
77
78	if (!gem)
79		return ERR_PTR(-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(gem);
87		return ERR_PTR(-EREMOTE);
88	}
89
90	return gem;
91}