1/* SPDX-License-Identifier: MIT */
2/*
3 * Copyright © 2023 Intel Corporation
4 */
5
6#include <linux/fb.h>
7
8#include "intel_fbdev_fb.h"
9#include "xe_bo.h"
10#include "xe_ttm_stolen_mgr.h"
11#include "xe_wa.h"
12
13#include <generated/xe_device_wa_oob.h>
14
15/*
16 * FIXME: There shouldn't be any reason to have XE_PAGE_SIZE stride
17 * alignment. The same 64 as i915 uses should be fine, and we shouldn't need to
18 * have driver specific values. However, dropping the stride alignment to 64
19 * leads to underflowing the bo pin count in the atomic cleanup work.
20 */
21u32 intel_fbdev_fb_pitch_align(u32 stride)
22{
23 return ALIGN(stride, XE_PAGE_SIZE);
24}
25
26struct drm_gem_object *intel_fbdev_fb_bo_create(struct drm_device *drm, int size)
27{
28 struct xe_device *xe = to_xe_device(drm);
29 struct xe_bo *obj;
30
31 obj = ERR_PTR(error: -ENODEV);
32
33 if (!IS_DGFX(xe) && !XE_DEVICE_WA(xe, 22019338487_display)) {
34 obj = xe_bo_create_pin_map_novm(xe, xe_device_get_root_tile(xe),
35 size,
36 ttm_bo_type_kernel, XE_BO_FLAG_SCANOUT |
37 XE_BO_FLAG_STOLEN |
38 XE_BO_FLAG_GGTT, false);
39 if (!IS_ERR(ptr: obj))
40 drm_info(&xe->drm, "Allocated fbdev into stolen\n");
41 else
42 drm_info(&xe->drm, "Allocated fbdev into stolen failed: %li\n", PTR_ERR(ptr: obj));
43 }
44
45 if (IS_ERR(ptr: obj)) {
46 obj = xe_bo_create_pin_map_novm(xe, xe_device_get_root_tile(xe), size,
47 ttm_bo_type_kernel, XE_BO_FLAG_SCANOUT |
48 XE_BO_FLAG_VRAM_IF_DGFX(xe_device_get_root_tile(xe)) |
49 XE_BO_FLAG_GGTT, false);
50 }
51
52 if (IS_ERR(ptr: obj)) {
53 drm_err(&xe->drm, "failed to allocate framebuffer (%pe)\n", obj);
54 return ERR_PTR(error: -ENOMEM);
55 }
56
57 return &obj->ttm.base;
58}
59
60void intel_fbdev_fb_bo_destroy(struct drm_gem_object *obj)
61{
62 xe_bo_unpin_map_no_vm(gem_to_xe_bo(obj));
63}
64
65int intel_fbdev_fb_fill_info(struct drm_device *drm, struct fb_info *info,
66 struct drm_gem_object *_obj, struct i915_vma *vma)
67{
68 struct xe_bo *obj = gem_to_xe_bo(_obj);
69 struct pci_dev *pdev = to_pci_dev(drm->dev);
70
71 if (!(obj->flags & XE_BO_FLAG_SYSTEM)) {
72 if (obj->flags & XE_BO_FLAG_STOLEN)
73 info->fix.smem_start = xe_ttm_stolen_io_offset(obj, 0);
74 else
75 info->fix.smem_start =
76 pci_resource_start(pdev, 2) +
77 xe_bo_addr(obj, 0, XE_PAGE_SIZE);
78
79 info->fix.smem_len = obj->ttm.base.size;
80 } else {
81 /* XXX: Pure fiction, as the BO may not be physically accessible.. */
82 info->fix.smem_start = 0;
83 info->fix.smem_len = obj->ttm.base.size;
84 }
85 XE_WARN_ON(iosys_map_is_null(&obj->vmap));
86
87 info->screen_base = obj->vmap.vaddr_iomem;
88 info->screen_size = obj->ttm.base.size;
89
90 return 0;
91}
92

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