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414c4531 DA |
1 | /* |
2 | * Copyright 2010 Matt Turner. | |
3 | * Copyright 2012 Red Hat | |
4 | * | |
5 | * This file is subject to the terms and conditions of the GNU General | |
6 | * Public License version 2. See the file COPYING in the main | |
7 | * directory of this archive for more details. | |
8 | * | |
9 | * Authors: Matthew Garrett | |
10 | * Matt Turner | |
11 | * Dave Airlie | |
12 | */ | |
13 | #include <linux/module.h> | |
760285e7 DH |
14 | #include <drm/drmP.h> |
15 | #include <drm/drm_fb_helper.h> | |
76a39dbf | 16 | #include <drm/drm_crtc_helper.h> |
414c4531 | 17 | |
414c4531 DA |
18 | #include "mgag200_drv.h" |
19 | ||
20 | static void mga_dirty_update(struct mga_fbdev *mfbdev, | |
21 | int x, int y, int width, int height) | |
22 | { | |
23 | int i; | |
24 | struct drm_gem_object *obj; | |
25 | struct mgag200_bo *bo; | |
26 | int src_offset, dst_offset; | |
272725c7 | 27 | int bpp = mfbdev->mfb.base.format->cpp[0]; |
a06b9a74 | 28 | int ret = -EBUSY; |
414c4531 | 29 | bool unmap = false; |
64171959 DA |
30 | bool store_for_later = false; |
31 | int x2, y2; | |
32 | unsigned long flags; | |
414c4531 DA |
33 | |
34 | obj = mfbdev->mfb.obj; | |
35 | bo = gem_to_mga_bo(obj); | |
36 | ||
64171959 DA |
37 | /* |
38 | * try and reserve the BO, if we fail with busy | |
39 | * then the BO is being moved and we should | |
40 | * store up the damage until later. | |
41 | */ | |
8b7ad1bb | 42 | if (drm_can_sleep()) |
a06b9a74 | 43 | ret = mgag200_bo_reserve(bo, true); |
414c4531 | 44 | if (ret) { |
64171959 DA |
45 | if (ret != -EBUSY) |
46 | return; | |
47 | ||
48 | store_for_later = true; | |
49 | } | |
50 | ||
51 | x2 = x + width - 1; | |
52 | y2 = y + height - 1; | |
53 | spin_lock_irqsave(&mfbdev->dirty_lock, flags); | |
54 | ||
55 | if (mfbdev->y1 < y) | |
56 | y = mfbdev->y1; | |
57 | if (mfbdev->y2 > y2) | |
58 | y2 = mfbdev->y2; | |
59 | if (mfbdev->x1 < x) | |
60 | x = mfbdev->x1; | |
61 | if (mfbdev->x2 > x2) | |
62 | x2 = mfbdev->x2; | |
63 | ||
64 | if (store_for_later) { | |
65 | mfbdev->x1 = x; | |
66 | mfbdev->x2 = x2; | |
67 | mfbdev->y1 = y; | |
68 | mfbdev->y2 = y2; | |
69 | spin_unlock_irqrestore(&mfbdev->dirty_lock, flags); | |
414c4531 DA |
70 | return; |
71 | } | |
72 | ||
64171959 DA |
73 | mfbdev->x1 = mfbdev->y1 = INT_MAX; |
74 | mfbdev->x2 = mfbdev->y2 = 0; | |
75 | spin_unlock_irqrestore(&mfbdev->dirty_lock, flags); | |
76 | ||
414c4531 DA |
77 | if (!bo->kmap.virtual) { |
78 | ret = ttm_bo_kmap(&bo->bo, 0, bo->bo.num_pages, &bo->kmap); | |
79 | if (ret) { | |
80 | DRM_ERROR("failed to kmap fb updates\n"); | |
81 | mgag200_bo_unreserve(bo); | |
82 | return; | |
83 | } | |
84 | unmap = true; | |
85 | } | |
64171959 | 86 | for (i = y; i <= y2; i++) { |
414c4531 DA |
87 | /* assume equal stride for now */ |
88 | src_offset = dst_offset = i * mfbdev->mfb.base.pitches[0] + (x * bpp); | |
64171959 | 89 | memcpy_toio(bo->kmap.virtual + src_offset, mfbdev->sysram + src_offset, (x2 - x + 1) * bpp); |
414c4531 DA |
90 | |
91 | } | |
92 | if (unmap) | |
93 | ttm_bo_kunmap(&bo->kmap); | |
94 | ||
95 | mgag200_bo_unreserve(bo); | |
96 | } | |
97 | ||
98 | static void mga_fillrect(struct fb_info *info, | |
99 | const struct fb_fillrect *rect) | |
100 | { | |
101 | struct mga_fbdev *mfbdev = info->par; | |
4f72a6ea | 102 | drm_fb_helper_sys_fillrect(info, rect); |
414c4531 DA |
103 | mga_dirty_update(mfbdev, rect->dx, rect->dy, rect->width, |
104 | rect->height); | |
105 | } | |
106 | ||
107 | static void mga_copyarea(struct fb_info *info, | |
108 | const struct fb_copyarea *area) | |
109 | { | |
110 | struct mga_fbdev *mfbdev = info->par; | |
4f72a6ea | 111 | drm_fb_helper_sys_copyarea(info, area); |
414c4531 DA |
112 | mga_dirty_update(mfbdev, area->dx, area->dy, area->width, |
113 | area->height); | |
114 | } | |
115 | ||
116 | static void mga_imageblit(struct fb_info *info, | |
117 | const struct fb_image *image) | |
118 | { | |
119 | struct mga_fbdev *mfbdev = info->par; | |
4f72a6ea | 120 | drm_fb_helper_sys_imageblit(info, image); |
414c4531 DA |
121 | mga_dirty_update(mfbdev, image->dx, image->dy, image->width, |
122 | image->height); | |
123 | } | |
124 | ||
125 | ||
126 | static struct fb_ops mgag200fb_ops = { | |
127 | .owner = THIS_MODULE, | |
128 | .fb_check_var = drm_fb_helper_check_var, | |
129 | .fb_set_par = drm_fb_helper_set_par, | |
130 | .fb_fillrect = mga_fillrect, | |
131 | .fb_copyarea = mga_copyarea, | |
132 | .fb_imageblit = mga_imageblit, | |
133 | .fb_pan_display = drm_fb_helper_pan_display, | |
134 | .fb_blank = drm_fb_helper_blank, | |
135 | .fb_setcmap = drm_fb_helper_setcmap, | |
136 | }; | |
137 | ||
138 | static int mgag200fb_create_object(struct mga_fbdev *afbdev, | |
1eb83451 | 139 | const struct drm_mode_fb_cmd2 *mode_cmd, |
414c4531 DA |
140 | struct drm_gem_object **gobj_p) |
141 | { | |
142 | struct drm_device *dev = afbdev->helper.dev; | |
414c4531 DA |
143 | u32 size; |
144 | struct drm_gem_object *gobj; | |
414c4531 | 145 | int ret = 0; |
414c4531 DA |
146 | |
147 | size = mode_cmd->pitches[0] * mode_cmd->height; | |
148 | ret = mgag200_gem_create(dev, size, true, &gobj); | |
149 | if (ret) | |
150 | return ret; | |
151 | ||
152 | *gobj_p = gobj; | |
153 | return ret; | |
154 | } | |
155 | ||
cd5428a5 | 156 | static int mgag200fb_create(struct drm_fb_helper *helper, |
414c4531 DA |
157 | struct drm_fb_helper_surface_size *sizes) |
158 | { | |
98cc0343 FF |
159 | struct mga_fbdev *mfbdev = |
160 | container_of(helper, struct mga_fbdev, helper); | |
414c4531 DA |
161 | struct drm_device *dev = mfbdev->helper.dev; |
162 | struct drm_mode_fb_cmd2 mode_cmd; | |
163 | struct mga_device *mdev = dev->dev_private; | |
164 | struct fb_info *info; | |
165 | struct drm_framebuffer *fb; | |
166 | struct drm_gem_object *gobj = NULL; | |
414c4531 DA |
167 | int ret; |
168 | void *sysram; | |
169 | int size; | |
170 | ||
171 | mode_cmd.width = sizes->surface_width; | |
172 | mode_cmd.height = sizes->surface_height; | |
173 | mode_cmd.pitches[0] = mode_cmd.width * ((sizes->surface_bpp + 7) / 8); | |
174 | ||
175 | mode_cmd.pixel_format = drm_mode_legacy_fb_format(sizes->surface_bpp, | |
176 | sizes->surface_depth); | |
177 | size = mode_cmd.pitches[0] * mode_cmd.height; | |
178 | ||
179 | ret = mgag200fb_create_object(mfbdev, &mode_cmd, &gobj); | |
180 | if (ret) { | |
181 | DRM_ERROR("failed to create fbcon backing object %d\n", ret); | |
182 | return ret; | |
183 | } | |
414c4531 DA |
184 | |
185 | sysram = vmalloc(size); | |
b0f56683 WY |
186 | if (!sysram) { |
187 | ret = -ENOMEM; | |
aec9e129 | 188 | goto err_sysram; |
b0f56683 | 189 | } |
414c4531 | 190 | |
4f72a6ea | 191 | info = drm_fb_helper_alloc_fbi(helper); |
aec9e129 AT |
192 | if (IS_ERR(info)) { |
193 | ret = PTR_ERR(info); | |
194 | goto err_alloc_fbi; | |
195 | } | |
414c4531 DA |
196 | |
197 | info->par = mfbdev; | |
198 | ||
199 | ret = mgag200_framebuffer_init(dev, &mfbdev->mfb, &mode_cmd, gobj); | |
200 | if (ret) | |
da7bdda2 | 201 | goto err_alloc_fbi; |
414c4531 DA |
202 | |
203 | mfbdev->sysram = sysram; | |
204 | mfbdev->size = size; | |
205 | ||
206 | fb = &mfbdev->mfb.base; | |
207 | ||
208 | /* setup helper */ | |
209 | mfbdev->helper.fb = fb; | |
414c4531 DA |
210 | |
211 | strcpy(info->fix.id, "mgadrmfb"); | |
212 | ||
414c4531 DA |
213 | info->fbops = &mgag200fb_ops; |
214 | ||
215 | /* setup aperture base/size for vesafb takeover */ | |
414c4531 DA |
216 | info->apertures->ranges[0].base = mdev->dev->mode_config.fb_base; |
217 | info->apertures->ranges[0].size = mdev->mc.vram_size; | |
218 | ||
b00c600e | 219 | drm_fb_helper_fill_fix(info, fb->pitches[0], fb->format->depth); |
414c4531 DA |
220 | drm_fb_helper_fill_var(info, &mfbdev->helper, sizes->fb_width, |
221 | sizes->fb_height); | |
222 | ||
223 | info->screen_base = sysram; | |
224 | info->screen_size = size; | |
225 | info->pixmap.flags = FB_PIXMAP_SYSTEM; | |
226 | ||
227 | DRM_DEBUG_KMS("allocated %dx%d\n", | |
228 | fb->width, fb->height); | |
aec9e129 | 229 | |
414c4531 | 230 | return 0; |
aec9e129 | 231 | |
aec9e129 AT |
232 | err_alloc_fbi: |
233 | vfree(sysram); | |
234 | err_sysram: | |
235 | drm_gem_object_unreference_unlocked(gobj); | |
236 | ||
237 | return ret; | |
414c4531 DA |
238 | } |
239 | ||
414c4531 DA |
240 | static int mga_fbdev_destroy(struct drm_device *dev, |
241 | struct mga_fbdev *mfbdev) | |
242 | { | |
414c4531 DA |
243 | struct mga_framebuffer *mfb = &mfbdev->mfb; |
244 | ||
4f72a6ea | 245 | drm_fb_helper_unregister_fbi(&mfbdev->helper); |
414c4531 DA |
246 | |
247 | if (mfb->obj) { | |
248 | drm_gem_object_unreference_unlocked(mfb->obj); | |
249 | mfb->obj = NULL; | |
250 | } | |
251 | drm_fb_helper_fini(&mfbdev->helper); | |
252 | vfree(mfbdev->sysram); | |
36206361 | 253 | drm_framebuffer_unregister_private(&mfb->base); |
414c4531 DA |
254 | drm_framebuffer_cleanup(&mfb->base); |
255 | ||
256 | return 0; | |
257 | } | |
258 | ||
3a493879 | 259 | static const struct drm_fb_helper_funcs mga_fb_helper_funcs = { |
414c4531 DA |
260 | .gamma_set = mga_crtc_fb_gamma_set, |
261 | .gamma_get = mga_crtc_fb_gamma_get, | |
cd5428a5 | 262 | .fb_probe = mgag200fb_create, |
414c4531 DA |
263 | }; |
264 | ||
265 | int mgag200_fbdev_init(struct mga_device *mdev) | |
266 | { | |
267 | struct mga_fbdev *mfbdev; | |
268 | int ret; | |
918be888 DA |
269 | int bpp_sel = 32; |
270 | ||
271 | /* prefer 16bpp on low end gpus with limited VRAM */ | |
272 | if (IS_G200_SE(mdev) && mdev->mc.vram_size < (2048*1024)) | |
273 | bpp_sel = 16; | |
414c4531 | 274 | |
c2ed8844 | 275 | mfbdev = devm_kzalloc(mdev->dev->dev, sizeof(struct mga_fbdev), GFP_KERNEL); |
414c4531 DA |
276 | if (!mfbdev) |
277 | return -ENOMEM; | |
278 | ||
279 | mdev->mfbdev = mfbdev; | |
64171959 | 280 | spin_lock_init(&mfbdev->dirty_lock); |
414c4531 | 281 | |
10a23102 TR |
282 | drm_fb_helper_prepare(mdev->dev, &mfbdev->helper, &mga_fb_helper_funcs); |
283 | ||
414c4531 | 284 | ret = drm_fb_helper_init(mdev->dev, &mfbdev->helper, |
e4563f6b | 285 | MGAG200FB_CONN_LIMIT); |
c2ed8844 | 286 | if (ret) |
aec9e129 | 287 | goto err_fb_helper; |
c2ed8844 | 288 | |
01934c2a TR |
289 | ret = drm_fb_helper_single_add_all_connectors(&mfbdev->helper); |
290 | if (ret) | |
aec9e129 | 291 | goto err_fb_setup; |
76a39dbf DV |
292 | |
293 | /* disable all the possible outputs/crtcs before entering KMS mode */ | |
294 | drm_helper_disable_unused_functions(mdev->dev); | |
295 | ||
01934c2a TR |
296 | ret = drm_fb_helper_initial_config(&mfbdev->helper, bpp_sel); |
297 | if (ret) | |
aec9e129 | 298 | goto err_fb_setup; |
414c4531 DA |
299 | |
300 | return 0; | |
01934c2a | 301 | |
aec9e129 | 302 | err_fb_setup: |
01934c2a | 303 | drm_fb_helper_fini(&mfbdev->helper); |
aec9e129 AT |
304 | err_fb_helper: |
305 | mdev->mfbdev = NULL; | |
306 | ||
01934c2a | 307 | return ret; |
414c4531 DA |
308 | } |
309 | ||
310 | void mgag200_fbdev_fini(struct mga_device *mdev) | |
311 | { | |
312 | if (!mdev->mfbdev) | |
313 | return; | |
314 | ||
315 | mga_fbdev_destroy(mdev->dev, mdev->mfbdev); | |
414c4531 | 316 | } |