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>
14 #include <drm/drmP.h>
15 #include <drm/drm_fb_helper.h>
16 #include <drm/drm_crtc_helper.h>
17
18 #include <linux/fb.h>
19
20 #include "mgag200_drv.h"
21
mga_dirty_update(struct mga_fbdev * mfbdev,int x,int y,int width,int height)22 static void mga_dirty_update(struct mga_fbdev *mfbdev,
23 int x, int y, int width, int height)
24 {
25 int i;
26 struct drm_gem_object *obj;
27 struct mgag200_bo *bo;
28 int src_offset, dst_offset;
29 int bpp = (mfbdev->mfb.base.bits_per_pixel + 7)/8;
30 int ret = -EBUSY;
31 bool unmap = false;
32 bool store_for_later = false;
33 int x2, y2;
34 unsigned long flags;
35
36 obj = mfbdev->mfb.obj;
37 bo = gem_to_mga_bo(obj);
38
39 /*
40 * try and reserve the BO, if we fail with busy
41 * then the BO is being moved and we should
42 * store up the damage until later.
43 */
44 if (drm_can_sleep())
45 ret = mgag200_bo_reserve(bo, true);
46 if (ret) {
47 if (ret != -EBUSY)
48 return;
49
50 store_for_later = true;
51 }
52
53 x2 = x + width - 1;
54 y2 = y + height - 1;
55 spin_lock_irqsave(&mfbdev->dirty_lock, flags);
56
57 if (mfbdev->y1 < y)
58 y = mfbdev->y1;
59 if (mfbdev->y2 > y2)
60 y2 = mfbdev->y2;
61 if (mfbdev->x1 < x)
62 x = mfbdev->x1;
63 if (mfbdev->x2 > x2)
64 x2 = mfbdev->x2;
65
66 if (store_for_later) {
67 mfbdev->x1 = x;
68 mfbdev->x2 = x2;
69 mfbdev->y1 = y;
70 mfbdev->y2 = y2;
71 spin_unlock_irqrestore(&mfbdev->dirty_lock, flags);
72 return;
73 }
74
75 mfbdev->x1 = mfbdev->y1 = INT_MAX;
76 mfbdev->x2 = mfbdev->y2 = 0;
77 spin_unlock_irqrestore(&mfbdev->dirty_lock, flags);
78
79 if (!bo->kmap.virtual) {
80 ret = ttm_bo_kmap(&bo->bo, 0, bo->bo.num_pages, &bo->kmap);
81 if (ret) {
82 DRM_ERROR("failed to kmap fb updates\n");
83 mgag200_bo_unreserve(bo);
84 return;
85 }
86 unmap = true;
87 }
88 for (i = y; i <= y2; i++) {
89 /* assume equal stride for now */
90 src_offset = dst_offset = i * mfbdev->mfb.base.pitches[0] + (x * bpp);
91 memcpy_toio(bo->kmap.virtual + src_offset, mfbdev->sysram + src_offset, (x2 - x + 1) * bpp);
92
93 }
94 if (unmap)
95 ttm_bo_kunmap(&bo->kmap);
96
97 mgag200_bo_unreserve(bo);
98 }
99
mga_fillrect(struct fb_info * info,const struct fb_fillrect * rect)100 static void mga_fillrect(struct fb_info *info,
101 const struct fb_fillrect *rect)
102 {
103 struct mga_fbdev *mfbdev = info->par;
104 sys_fillrect(info, rect);
105 mga_dirty_update(mfbdev, rect->dx, rect->dy, rect->width,
106 rect->height);
107 }
108
mga_copyarea(struct fb_info * info,const struct fb_copyarea * area)109 static void mga_copyarea(struct fb_info *info,
110 const struct fb_copyarea *area)
111 {
112 struct mga_fbdev *mfbdev = info->par;
113 sys_copyarea(info, area);
114 mga_dirty_update(mfbdev, area->dx, area->dy, area->width,
115 area->height);
116 }
117
mga_imageblit(struct fb_info * info,const struct fb_image * image)118 static void mga_imageblit(struct fb_info *info,
119 const struct fb_image *image)
120 {
121 struct mga_fbdev *mfbdev = info->par;
122 sys_imageblit(info, image);
123 mga_dirty_update(mfbdev, image->dx, image->dy, image->width,
124 image->height);
125 }
126
127
128 static struct fb_ops mgag200fb_ops = {
129 .owner = THIS_MODULE,
130 .fb_check_var = drm_fb_helper_check_var,
131 .fb_set_par = drm_fb_helper_set_par,
132 .fb_fillrect = mga_fillrect,
133 .fb_copyarea = mga_copyarea,
134 .fb_imageblit = mga_imageblit,
135 .fb_pan_display = drm_fb_helper_pan_display,
136 .fb_blank = drm_fb_helper_blank,
137 .fb_setcmap = drm_fb_helper_setcmap,
138 };
139
mgag200fb_create_object(struct mga_fbdev * afbdev,struct drm_mode_fb_cmd2 * mode_cmd,struct drm_gem_object ** gobj_p)140 static int mgag200fb_create_object(struct mga_fbdev *afbdev,
141 struct drm_mode_fb_cmd2 *mode_cmd,
142 struct drm_gem_object **gobj_p)
143 {
144 struct drm_device *dev = afbdev->helper.dev;
145 u32 size;
146 struct drm_gem_object *gobj;
147 int ret = 0;
148
149 size = mode_cmd->pitches[0] * mode_cmd->height;
150 ret = mgag200_gem_create(dev, size, true, &gobj);
151 if (ret)
152 return ret;
153
154 *gobj_p = gobj;
155 return ret;
156 }
157
mgag200fb_create(struct drm_fb_helper * helper,struct drm_fb_helper_surface_size * sizes)158 static int mgag200fb_create(struct drm_fb_helper *helper,
159 struct drm_fb_helper_surface_size *sizes)
160 {
161 struct mga_fbdev *mfbdev =
162 container_of(helper, struct mga_fbdev, helper);
163 struct drm_device *dev = mfbdev->helper.dev;
164 struct drm_mode_fb_cmd2 mode_cmd;
165 struct mga_device *mdev = dev->dev_private;
166 struct fb_info *info;
167 struct drm_framebuffer *fb;
168 struct drm_gem_object *gobj = NULL;
169 struct device *device = &dev->pdev->dev;
170 struct mgag200_bo *bo;
171 int ret;
172 void *sysram;
173 int size;
174
175 mode_cmd.width = sizes->surface_width;
176 mode_cmd.height = sizes->surface_height;
177 mode_cmd.pitches[0] = mode_cmd.width * ((sizes->surface_bpp + 7) / 8);
178
179 mode_cmd.pixel_format = drm_mode_legacy_fb_format(sizes->surface_bpp,
180 sizes->surface_depth);
181 size = mode_cmd.pitches[0] * mode_cmd.height;
182
183 ret = mgag200fb_create_object(mfbdev, &mode_cmd, &gobj);
184 if (ret) {
185 DRM_ERROR("failed to create fbcon backing object %d\n", ret);
186 return ret;
187 }
188 bo = gem_to_mga_bo(gobj);
189
190 sysram = vmalloc(size);
191 if (!sysram)
192 return -ENOMEM;
193
194 info = framebuffer_alloc(0, device);
195 if (info == NULL)
196 return -ENOMEM;
197
198 info->par = mfbdev;
199
200 ret = mgag200_framebuffer_init(dev, &mfbdev->mfb, &mode_cmd, gobj);
201 if (ret)
202 return ret;
203
204 mfbdev->sysram = sysram;
205 mfbdev->size = size;
206
207 fb = &mfbdev->mfb.base;
208
209 /* setup helper */
210 mfbdev->helper.fb = fb;
211 mfbdev->helper.fbdev = info;
212
213 ret = fb_alloc_cmap(&info->cmap, 256, 0);
214 if (ret) {
215 DRM_ERROR("%s: can't allocate color map\n", info->fix.id);
216 ret = -ENOMEM;
217 goto out;
218 }
219
220 strcpy(info->fix.id, "mgadrmfb");
221
222 info->flags = FBINFO_DEFAULT | FBINFO_CAN_FORCE_OUTPUT;
223 info->fbops = &mgag200fb_ops;
224
225 /* setup aperture base/size for vesafb takeover */
226 info->apertures = alloc_apertures(1);
227 if (!info->apertures) {
228 ret = -ENOMEM;
229 goto out;
230 }
231 info->apertures->ranges[0].base = mdev->dev->mode_config.fb_base;
232 info->apertures->ranges[0].size = mdev->mc.vram_size;
233
234 drm_fb_helper_fill_fix(info, fb->pitches[0], fb->depth);
235 drm_fb_helper_fill_var(info, &mfbdev->helper, sizes->fb_width,
236 sizes->fb_height);
237
238 info->screen_base = sysram;
239 info->screen_size = size;
240 info->pixmap.flags = FB_PIXMAP_SYSTEM;
241
242 DRM_DEBUG_KMS("allocated %dx%d\n",
243 fb->width, fb->height);
244 return 0;
245 out:
246 return ret;
247 }
248
mga_fbdev_destroy(struct drm_device * dev,struct mga_fbdev * mfbdev)249 static int mga_fbdev_destroy(struct drm_device *dev,
250 struct mga_fbdev *mfbdev)
251 {
252 struct fb_info *info;
253 struct mga_framebuffer *mfb = &mfbdev->mfb;
254
255 if (mfbdev->helper.fbdev) {
256 info = mfbdev->helper.fbdev;
257
258 unregister_framebuffer(info);
259 if (info->cmap.len)
260 fb_dealloc_cmap(&info->cmap);
261 framebuffer_release(info);
262 }
263
264 if (mfb->obj) {
265 drm_gem_object_unreference_unlocked(mfb->obj);
266 mfb->obj = NULL;
267 }
268 drm_fb_helper_fini(&mfbdev->helper);
269 vfree(mfbdev->sysram);
270 drm_framebuffer_unregister_private(&mfb->base);
271 drm_framebuffer_cleanup(&mfb->base);
272
273 return 0;
274 }
275
276 static const struct drm_fb_helper_funcs mga_fb_helper_funcs = {
277 .gamma_set = mga_crtc_fb_gamma_set,
278 .gamma_get = mga_crtc_fb_gamma_get,
279 .fb_probe = mgag200fb_create,
280 };
281
mgag200_fbdev_init(struct mga_device * mdev)282 int mgag200_fbdev_init(struct mga_device *mdev)
283 {
284 struct mga_fbdev *mfbdev;
285 int ret;
286 int bpp_sel = 32;
287
288 /* prefer 16bpp on low end gpus with limited VRAM */
289 if (IS_G200_SE(mdev) && mdev->mc.vram_size < (2048*1024))
290 bpp_sel = 16;
291
292 mfbdev = devm_kzalloc(mdev->dev->dev, sizeof(struct mga_fbdev), GFP_KERNEL);
293 if (!mfbdev)
294 return -ENOMEM;
295
296 mdev->mfbdev = mfbdev;
297 spin_lock_init(&mfbdev->dirty_lock);
298
299 drm_fb_helper_prepare(mdev->dev, &mfbdev->helper, &mga_fb_helper_funcs);
300
301 ret = drm_fb_helper_init(mdev->dev, &mfbdev->helper,
302 mdev->num_crtc, MGAG200FB_CONN_LIMIT);
303 if (ret)
304 return ret;
305
306 ret = drm_fb_helper_single_add_all_connectors(&mfbdev->helper);
307 if (ret)
308 goto fini;
309
310 /* disable all the possible outputs/crtcs before entering KMS mode */
311 drm_helper_disable_unused_functions(mdev->dev);
312
313 ret = drm_fb_helper_initial_config(&mfbdev->helper, bpp_sel);
314 if (ret)
315 goto fini;
316
317 return 0;
318
319 fini:
320 drm_fb_helper_fini(&mfbdev->helper);
321 return ret;
322 }
323
mgag200_fbdev_fini(struct mga_device * mdev)324 void mgag200_fbdev_fini(struct mga_device *mdev)
325 {
326 if (!mdev->mfbdev)
327 return;
328
329 mga_fbdev_destroy(mdev->dev, mdev->mfbdev);
330 }
331