1 /*
2 * This program is free software; you can redistribute it and/or modify
3 * it under the terms of the GNU General Public License as published by
4 * the Free Software Foundation; either version 2 of the License, or
5 * (at your option) any later version.
6 */
7
8 #include "bochs.h"
9
10 /* ---------------------------------------------------------------------- */
11
bochsfb_mmap(struct fb_info * info,struct vm_area_struct * vma)12 static int bochsfb_mmap(struct fb_info *info,
13 struct vm_area_struct *vma)
14 {
15 struct drm_fb_helper *fb_helper = info->par;
16 struct bochs_device *bochs =
17 container_of(fb_helper, struct bochs_device, fb.helper);
18 struct bochs_bo *bo = gem_to_bochs_bo(bochs->fb.gfb.obj);
19
20 return ttm_fbdev_mmap(vma, &bo->bo);
21 }
22
23 static struct fb_ops bochsfb_ops = {
24 .owner = THIS_MODULE,
25 .fb_check_var = drm_fb_helper_check_var,
26 .fb_set_par = drm_fb_helper_set_par,
27 .fb_fillrect = drm_fb_helper_sys_fillrect,
28 .fb_copyarea = drm_fb_helper_sys_copyarea,
29 .fb_imageblit = drm_fb_helper_sys_imageblit,
30 .fb_pan_display = drm_fb_helper_pan_display,
31 .fb_blank = drm_fb_helper_blank,
32 .fb_setcmap = drm_fb_helper_setcmap,
33 .fb_mmap = bochsfb_mmap,
34 };
35
bochsfb_create_object(struct bochs_device * bochs,const struct drm_mode_fb_cmd2 * mode_cmd,struct drm_gem_object ** gobj_p)36 static int bochsfb_create_object(struct bochs_device *bochs,
37 const struct drm_mode_fb_cmd2 *mode_cmd,
38 struct drm_gem_object **gobj_p)
39 {
40 struct drm_device *dev = bochs->dev;
41 struct drm_gem_object *gobj;
42 u32 size;
43 int ret = 0;
44
45 size = mode_cmd->pitches[0] * mode_cmd->height;
46 ret = bochs_gem_create(dev, size, true, &gobj);
47 if (ret)
48 return ret;
49
50 *gobj_p = gobj;
51 return ret;
52 }
53
bochsfb_create(struct drm_fb_helper * helper,struct drm_fb_helper_surface_size * sizes)54 static int bochsfb_create(struct drm_fb_helper *helper,
55 struct drm_fb_helper_surface_size *sizes)
56 {
57 struct bochs_device *bochs =
58 container_of(helper, struct bochs_device, fb.helper);
59 struct fb_info *info;
60 struct drm_framebuffer *fb;
61 struct drm_mode_fb_cmd2 mode_cmd;
62 struct drm_gem_object *gobj = NULL;
63 struct bochs_bo *bo = NULL;
64 int size, ret;
65
66 if (sizes->surface_bpp != 32)
67 return -EINVAL;
68
69 mode_cmd.width = sizes->surface_width;
70 mode_cmd.height = sizes->surface_height;
71 mode_cmd.pitches[0] = mode_cmd.width * ((sizes->surface_bpp + 7) / 8);
72 mode_cmd.pixel_format = drm_mode_legacy_fb_format(sizes->surface_bpp,
73 sizes->surface_depth);
74 size = mode_cmd.pitches[0] * mode_cmd.height;
75
76 /* alloc, pin & map bo */
77 ret = bochsfb_create_object(bochs, &mode_cmd, &gobj);
78 if (ret) {
79 DRM_ERROR("failed to create fbcon backing object %d\n", ret);
80 return ret;
81 }
82
83 bo = gem_to_bochs_bo(gobj);
84
85 ret = ttm_bo_reserve(&bo->bo, true, false, NULL);
86 if (ret)
87 return ret;
88
89 ret = bochs_bo_pin(bo, TTM_PL_FLAG_VRAM, NULL);
90 if (ret) {
91 DRM_ERROR("failed to pin fbcon\n");
92 ttm_bo_unreserve(&bo->bo);
93 return ret;
94 }
95
96 ret = ttm_bo_kmap(&bo->bo, 0, bo->bo.num_pages,
97 &bo->kmap);
98 if (ret) {
99 DRM_ERROR("failed to kmap fbcon\n");
100 ttm_bo_unreserve(&bo->bo);
101 return ret;
102 }
103
104 ttm_bo_unreserve(&bo->bo);
105
106 /* init fb device */
107 info = drm_fb_helper_alloc_fbi(helper);
108 if (IS_ERR(info))
109 return PTR_ERR(info);
110
111 info->par = &bochs->fb.helper;
112
113 ret = bochs_framebuffer_init(bochs->dev, &bochs->fb.gfb, &mode_cmd, gobj);
114 if (ret) {
115 drm_fb_helper_release_fbi(helper);
116 return ret;
117 }
118
119 bochs->fb.size = size;
120
121 /* setup helper */
122 fb = &bochs->fb.gfb.base;
123 bochs->fb.helper.fb = fb;
124
125 strcpy(info->fix.id, "bochsdrmfb");
126
127 info->flags = FBINFO_DEFAULT;
128 info->fbops = &bochsfb_ops;
129
130 drm_fb_helper_fill_fix(info, fb->pitches[0], fb->depth);
131 drm_fb_helper_fill_var(info, &bochs->fb.helper, sizes->fb_width,
132 sizes->fb_height);
133
134 info->screen_base = bo->kmap.virtual;
135 info->screen_size = size;
136
137 drm_vma_offset_remove(&bo->bo.bdev->vma_manager, &bo->bo.vma_node);
138 info->fix.smem_start = 0;
139 info->fix.smem_len = size;
140
141 return 0;
142 }
143
bochs_fbdev_destroy(struct bochs_device * bochs)144 static int bochs_fbdev_destroy(struct bochs_device *bochs)
145 {
146 struct bochs_framebuffer *gfb = &bochs->fb.gfb;
147
148 DRM_DEBUG_DRIVER("\n");
149
150 drm_fb_helper_unregister_fbi(&bochs->fb.helper);
151 drm_fb_helper_release_fbi(&bochs->fb.helper);
152
153 if (gfb->obj) {
154 drm_gem_object_unreference_unlocked(gfb->obj);
155 gfb->obj = NULL;
156 }
157
158 drm_fb_helper_fini(&bochs->fb.helper);
159 drm_framebuffer_unregister_private(&gfb->base);
160 drm_framebuffer_cleanup(&gfb->base);
161
162 return 0;
163 }
164
165 static const struct drm_fb_helper_funcs bochs_fb_helper_funcs = {
166 .fb_probe = bochsfb_create,
167 };
168
bochs_fbdev_init(struct bochs_device * bochs)169 int bochs_fbdev_init(struct bochs_device *bochs)
170 {
171 int ret;
172
173 drm_fb_helper_prepare(bochs->dev, &bochs->fb.helper,
174 &bochs_fb_helper_funcs);
175
176 ret = drm_fb_helper_init(bochs->dev, &bochs->fb.helper,
177 1, 1);
178 if (ret)
179 return ret;
180
181 ret = drm_fb_helper_single_add_all_connectors(&bochs->fb.helper);
182 if (ret)
183 goto fini;
184
185 drm_helper_disable_unused_functions(bochs->dev);
186
187 ret = drm_fb_helper_initial_config(&bochs->fb.helper, 32);
188 if (ret)
189 goto fini;
190
191 bochs->fb.initialized = true;
192 return 0;
193
194 fini:
195 drm_fb_helper_fini(&bochs->fb.helper);
196 return ret;
197 }
198
bochs_fbdev_fini(struct bochs_device * bochs)199 void bochs_fbdev_fini(struct bochs_device *bochs)
200 {
201 if (!bochs->fb.initialized)
202 return;
203
204 bochs_fbdev_destroy(bochs);
205 bochs->fb.initialized = false;
206 }
207