1 | /* SPDX-License-Identifier: MIT */ |
2 | /* |
3 | * Copyright © 2023 Intel Corporation |
4 | */ |
5 | |
6 | #include <drm/drm_fb_helper.h> |
7 | |
8 | #include "gem/i915_gem_lmem.h" |
9 | |
10 | #include "i915_drv.h" |
11 | #include "intel_display_types.h" |
12 | #include "intel_fbdev_fb.h" |
13 | |
14 | struct drm_framebuffer *intel_fbdev_fb_alloc(struct drm_fb_helper *helper, |
15 | struct drm_fb_helper_surface_size *sizes) |
16 | { |
17 | struct drm_framebuffer *fb; |
18 | struct drm_device *dev = helper->dev; |
19 | struct drm_i915_private *dev_priv = to_i915(dev); |
20 | struct drm_mode_fb_cmd2 mode_cmd = {}; |
21 | struct drm_i915_gem_object *obj; |
22 | int size; |
23 | |
24 | /* we don't do packed 24bpp */ |
25 | if (sizes->surface_bpp == 24) |
26 | sizes->surface_bpp = 32; |
27 | |
28 | mode_cmd.width = sizes->surface_width; |
29 | mode_cmd.height = sizes->surface_height; |
30 | |
31 | mode_cmd.pitches[0] = ALIGN(mode_cmd.width * |
32 | DIV_ROUND_UP(sizes->surface_bpp, 8), 64); |
33 | mode_cmd.pixel_format = drm_mode_legacy_fb_format(bpp: sizes->surface_bpp, |
34 | depth: sizes->surface_depth); |
35 | |
36 | size = mode_cmd.pitches[0] * mode_cmd.height; |
37 | size = PAGE_ALIGN(size); |
38 | |
39 | obj = ERR_PTR(error: -ENODEV); |
40 | if (HAS_LMEM(dev_priv)) { |
41 | obj = i915_gem_object_create_lmem(i915: dev_priv, size, |
42 | I915_BO_ALLOC_CONTIGUOUS | |
43 | I915_BO_ALLOC_USER); |
44 | } else { |
45 | /* |
46 | * If the FB is too big, just don't use it since fbdev is not very |
47 | * important and we should probably use that space with FBC or other |
48 | * features. |
49 | * |
50 | * Also skip stolen on MTL as Wa_22018444074 mitigation. |
51 | */ |
52 | if (!(IS_METEORLAKE(dev_priv)) && size * 2 < dev_priv->dsm.usable_size) |
53 | obj = i915_gem_object_create_stolen(dev_priv, size); |
54 | if (IS_ERR(ptr: obj)) |
55 | obj = i915_gem_object_create_shmem(i915: dev_priv, size); |
56 | } |
57 | |
58 | if (IS_ERR(ptr: obj)) { |
59 | drm_err(&dev_priv->drm, "failed to allocate framebuffer (%pe)\n" , obj); |
60 | return ERR_PTR(error: -ENOMEM); |
61 | } |
62 | |
63 | fb = intel_framebuffer_create(obj, mode_cmd: &mode_cmd); |
64 | i915_gem_object_put(obj); |
65 | |
66 | return fb; |
67 | } |
68 | |
69 | int intel_fbdev_fb_fill_info(struct drm_i915_private *i915, struct fb_info *info, |
70 | struct drm_i915_gem_object *obj, struct i915_vma *vma) |
71 | { |
72 | struct i915_gem_ww_ctx ww; |
73 | void __iomem *vaddr; |
74 | int ret; |
75 | |
76 | if (i915_gem_object_is_lmem(obj)) { |
77 | struct intel_memory_region *mem = obj->mm.region; |
78 | |
79 | /* Use fbdev's framebuffer from lmem for discrete */ |
80 | info->fix.smem_start = |
81 | (unsigned long)(mem->io.start + |
82 | i915_gem_object_get_dma_address(obj, 0) - |
83 | mem->region.start); |
84 | info->fix.smem_len = obj->base.size; |
85 | } else { |
86 | struct i915_ggtt *ggtt = to_gt(i915)->ggtt; |
87 | |
88 | /* Our framebuffer is the entirety of fbdev's system memory */ |
89 | info->fix.smem_start = |
90 | (unsigned long)(ggtt->gmadr.start + i915_ggtt_offset(vma)); |
91 | info->fix.smem_len = vma->size; |
92 | } |
93 | |
94 | for_i915_gem_ww(&ww, ret, false) { |
95 | ret = i915_gem_object_lock(obj: vma->obj, ww: &ww); |
96 | |
97 | if (ret) |
98 | continue; |
99 | |
100 | vaddr = i915_vma_pin_iomap(vma); |
101 | if (IS_ERR(ptr: vaddr)) { |
102 | drm_err(&i915->drm, |
103 | "Failed to remap framebuffer into virtual memory (%pe)\n" , vaddr); |
104 | ret = PTR_ERR(ptr: vaddr); |
105 | continue; |
106 | } |
107 | } |
108 | |
109 | if (ret) |
110 | return ret; |
111 | |
112 | info->screen_base = vaddr; |
113 | info->screen_size = intel_bo_to_drm_bo(obj)->size; |
114 | |
115 | return 0; |
116 | } |
117 | |