1 /*
2 * Copyright © 2007 David Airlie
3 *
4 * Permission is hereby granted, free of charge, to any person obtaining a
5 * copy of this software and associated documentation files (the "Software"),
6 * to deal in the Software without restriction, including without limitation
7 * the rights to use, copy, modify, merge, publish, distribute, sublicense,
8 * and/or sell copies of the Software, and to permit persons to whom the
9 * Software is furnished to do so, subject to the following conditions:
10 *
11 * The above copyright notice and this permission notice (including the next
12 * paragraph) shall be included in all copies or substantial portions of the
13 * Software.
14 *
15 * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
16 * IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
17 * FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL
18 * THE AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER
19 * LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING
20 * FROM, OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER
21 * DEALINGS IN THE SOFTWARE.
22 *
23 * Authors:
24 * David Airlie
25 */
26 #include <linux/module.h>
27 #include <linux/slab.h>
28 #include <linux/pm_runtime.h>
29
30 #include <drm/drmP.h>
31 #include <drm/drm_crtc.h>
32 #include <drm/drm_crtc_helper.h>
33 #include <drm/radeon_drm.h>
34 #include "radeon.h"
35
36 #include <drm/drm_fb_helper.h>
37
38 #include <linux/vga_switcheroo.h>
39
40 /* object hierarchy -
41 * this contains a helper + a radeon fb
42 * the helper contains a pointer to radeon framebuffer baseclass.
43 */
44 struct radeon_fbdev {
45 struct drm_fb_helper helper;
46 struct drm_framebuffer fb;
47 struct radeon_device *rdev;
48 };
49
50 static int
radeonfb_open(struct fb_info * info,int user)51 radeonfb_open(struct fb_info *info, int user)
52 {
53 struct radeon_fbdev *rfbdev = info->par;
54 struct radeon_device *rdev = rfbdev->rdev;
55 int ret = pm_runtime_get_sync(rdev->ddev->dev);
56 if (ret < 0 && ret != -EACCES) {
57 pm_runtime_mark_last_busy(rdev->ddev->dev);
58 pm_runtime_put_autosuspend(rdev->ddev->dev);
59 return ret;
60 }
61 return 0;
62 }
63
64 static int
radeonfb_release(struct fb_info * info,int user)65 radeonfb_release(struct fb_info *info, int user)
66 {
67 struct radeon_fbdev *rfbdev = info->par;
68 struct radeon_device *rdev = rfbdev->rdev;
69
70 pm_runtime_mark_last_busy(rdev->ddev->dev);
71 pm_runtime_put_autosuspend(rdev->ddev->dev);
72 return 0;
73 }
74
75 static struct fb_ops radeonfb_ops = {
76 .owner = THIS_MODULE,
77 DRM_FB_HELPER_DEFAULT_OPS,
78 .fb_open = radeonfb_open,
79 .fb_release = radeonfb_release,
80 .fb_fillrect = drm_fb_helper_cfb_fillrect,
81 .fb_copyarea = drm_fb_helper_cfb_copyarea,
82 .fb_imageblit = drm_fb_helper_cfb_imageblit,
83 };
84
85
radeon_align_pitch(struct radeon_device * rdev,int width,int cpp,bool tiled)86 int radeon_align_pitch(struct radeon_device *rdev, int width, int cpp, bool tiled)
87 {
88 int aligned = width;
89 int align_large = (ASIC_IS_AVIVO(rdev)) || tiled;
90 int pitch_mask = 0;
91
92 switch (cpp) {
93 case 1:
94 pitch_mask = align_large ? 255 : 127;
95 break;
96 case 2:
97 pitch_mask = align_large ? 127 : 31;
98 break;
99 case 3:
100 case 4:
101 pitch_mask = align_large ? 63 : 15;
102 break;
103 }
104
105 aligned += pitch_mask;
106 aligned &= ~pitch_mask;
107 return aligned * cpp;
108 }
109
radeonfb_destroy_pinned_object(struct drm_gem_object * gobj)110 static void radeonfb_destroy_pinned_object(struct drm_gem_object *gobj)
111 {
112 struct radeon_bo *rbo = gem_to_radeon_bo(gobj);
113 int ret;
114
115 ret = radeon_bo_reserve(rbo, false);
116 if (likely(ret == 0)) {
117 radeon_bo_kunmap(rbo);
118 radeon_bo_unpin(rbo);
119 radeon_bo_unreserve(rbo);
120 }
121 drm_gem_object_put_unlocked(gobj);
122 }
123
radeonfb_create_pinned_object(struct radeon_fbdev * rfbdev,struct drm_mode_fb_cmd2 * mode_cmd,struct drm_gem_object ** gobj_p)124 static int radeonfb_create_pinned_object(struct radeon_fbdev *rfbdev,
125 struct drm_mode_fb_cmd2 *mode_cmd,
126 struct drm_gem_object **gobj_p)
127 {
128 struct radeon_device *rdev = rfbdev->rdev;
129 struct drm_gem_object *gobj = NULL;
130 struct radeon_bo *rbo = NULL;
131 bool fb_tiled = false; /* useful for testing */
132 u32 tiling_flags = 0;
133 int ret;
134 int aligned_size, size;
135 int height = mode_cmd->height;
136 u32 cpp;
137
138 cpp = drm_format_plane_cpp(mode_cmd->pixel_format, 0);
139
140 /* need to align pitch with crtc limits */
141 mode_cmd->pitches[0] = radeon_align_pitch(rdev, mode_cmd->width, cpp,
142 fb_tiled);
143
144 if (rdev->family >= CHIP_R600)
145 height = ALIGN(mode_cmd->height, 8);
146 size = mode_cmd->pitches[0] * height;
147 aligned_size = ALIGN(size, PAGE_SIZE);
148 ret = radeon_gem_object_create(rdev, aligned_size, 0,
149 RADEON_GEM_DOMAIN_VRAM,
150 0, true, &gobj);
151 if (ret) {
152 pr_err("failed to allocate framebuffer (%d)\n", aligned_size);
153 return -ENOMEM;
154 }
155 rbo = gem_to_radeon_bo(gobj);
156
157 if (fb_tiled)
158 tiling_flags = RADEON_TILING_MACRO;
159
160 #ifdef __BIG_ENDIAN
161 switch (cpp) {
162 case 4:
163 tiling_flags |= RADEON_TILING_SWAP_32BIT;
164 break;
165 case 2:
166 tiling_flags |= RADEON_TILING_SWAP_16BIT;
167 default:
168 break;
169 }
170 #endif
171
172 if (tiling_flags) {
173 ret = radeon_bo_set_tiling_flags(rbo,
174 tiling_flags | RADEON_TILING_SURFACE,
175 mode_cmd->pitches[0]);
176 if (ret)
177 dev_err(rdev->dev, "FB failed to set tiling flags\n");
178 }
179
180
181 ret = radeon_bo_reserve(rbo, false);
182 if (unlikely(ret != 0))
183 goto out_unref;
184 /* Only 27 bit offset for legacy CRTC */
185 ret = radeon_bo_pin_restricted(rbo, RADEON_GEM_DOMAIN_VRAM,
186 ASIC_IS_AVIVO(rdev) ? 0 : 1 << 27,
187 NULL);
188 if (ret) {
189 radeon_bo_unreserve(rbo);
190 goto out_unref;
191 }
192 if (fb_tiled)
193 radeon_bo_check_tiling(rbo, 0, 0);
194 ret = radeon_bo_kmap(rbo, NULL);
195 radeon_bo_unreserve(rbo);
196 if (ret) {
197 goto out_unref;
198 }
199
200 *gobj_p = gobj;
201 return 0;
202 out_unref:
203 radeonfb_destroy_pinned_object(gobj);
204 *gobj_p = NULL;
205 return ret;
206 }
207
radeonfb_create(struct drm_fb_helper * helper,struct drm_fb_helper_surface_size * sizes)208 static int radeonfb_create(struct drm_fb_helper *helper,
209 struct drm_fb_helper_surface_size *sizes)
210 {
211 struct radeon_fbdev *rfbdev =
212 container_of(helper, struct radeon_fbdev, helper);
213 struct radeon_device *rdev = rfbdev->rdev;
214 struct fb_info *info;
215 struct drm_framebuffer *fb = NULL;
216 struct drm_mode_fb_cmd2 mode_cmd;
217 struct drm_gem_object *gobj = NULL;
218 struct radeon_bo *rbo = NULL;
219 int ret;
220 unsigned long tmp;
221
222 mode_cmd.width = sizes->surface_width;
223 mode_cmd.height = sizes->surface_height;
224
225 /* avivo can't scanout real 24bpp */
226 if ((sizes->surface_bpp == 24) && ASIC_IS_AVIVO(rdev))
227 sizes->surface_bpp = 32;
228
229 mode_cmd.pixel_format = drm_mode_legacy_fb_format(sizes->surface_bpp,
230 sizes->surface_depth);
231
232 ret = radeonfb_create_pinned_object(rfbdev, &mode_cmd, &gobj);
233 if (ret) {
234 DRM_ERROR("failed to create fbcon object %d\n", ret);
235 return ret;
236 }
237
238 rbo = gem_to_radeon_bo(gobj);
239
240 /* okay we have an object now allocate the framebuffer */
241 info = drm_fb_helper_alloc_fbi(helper);
242 if (IS_ERR(info)) {
243 ret = PTR_ERR(info);
244 goto out;
245 }
246
247 info->par = rfbdev;
248
249 ret = radeon_framebuffer_init(rdev->ddev, &rfbdev->fb, &mode_cmd, gobj);
250 if (ret) {
251 DRM_ERROR("failed to initialize framebuffer %d\n", ret);
252 goto out;
253 }
254
255 fb = &rfbdev->fb;
256
257 /* setup helper */
258 rfbdev->helper.fb = fb;
259
260 memset_io(rbo->kptr, 0x0, radeon_bo_size(rbo));
261
262 strcpy(info->fix.id, "radeondrmfb");
263
264 drm_fb_helper_fill_fix(info, fb->pitches[0], fb->format->depth);
265
266 info->fbops = &radeonfb_ops;
267
268 tmp = radeon_bo_gpu_offset(rbo) - rdev->mc.vram_start;
269 info->fix.smem_start = rdev->mc.aper_base + tmp;
270 info->fix.smem_len = radeon_bo_size(rbo);
271 info->screen_base = rbo->kptr;
272 info->screen_size = radeon_bo_size(rbo);
273
274 drm_fb_helper_fill_var(info, &rfbdev->helper, sizes->fb_width, sizes->fb_height);
275
276 /* setup aperture base/size for vesafb takeover */
277 info->apertures->ranges[0].base = rdev->ddev->mode_config.fb_base;
278 info->apertures->ranges[0].size = rdev->mc.aper_size;
279
280 /* Use default scratch pixmap (info->pixmap.flags = FB_PIXMAP_SYSTEM) */
281
282 if (info->screen_base == NULL) {
283 ret = -ENOSPC;
284 goto out;
285 }
286
287 DRM_INFO("fb mappable at 0x%lX\n", info->fix.smem_start);
288 DRM_INFO("vram apper at 0x%lX\n", (unsigned long)rdev->mc.aper_base);
289 DRM_INFO("size %lu\n", (unsigned long)radeon_bo_size(rbo));
290 DRM_INFO("fb depth is %d\n", fb->format->depth);
291 DRM_INFO(" pitch is %d\n", fb->pitches[0]);
292
293 vga_switcheroo_client_fb_set(rdev->ddev->pdev, info);
294 return 0;
295
296 out:
297 if (rbo) {
298
299 }
300 if (fb && ret) {
301 drm_gem_object_put_unlocked(gobj);
302 drm_framebuffer_unregister_private(fb);
303 drm_framebuffer_cleanup(fb);
304 kfree(fb);
305 }
306 return ret;
307 }
308
radeon_fbdev_destroy(struct drm_device * dev,struct radeon_fbdev * rfbdev)309 static int radeon_fbdev_destroy(struct drm_device *dev, struct radeon_fbdev *rfbdev)
310 {
311 struct drm_framebuffer *fb = &rfbdev->fb;
312
313 drm_fb_helper_unregister_fbi(&rfbdev->helper);
314
315 if (fb->obj[0]) {
316 radeonfb_destroy_pinned_object(fb->obj[0]);
317 fb->obj[0] = NULL;
318 drm_framebuffer_unregister_private(fb);
319 drm_framebuffer_cleanup(fb);
320 }
321 drm_fb_helper_fini(&rfbdev->helper);
322
323 return 0;
324 }
325
326 static const struct drm_fb_helper_funcs radeon_fb_helper_funcs = {
327 .fb_probe = radeonfb_create,
328 };
329
radeon_fbdev_init(struct radeon_device * rdev)330 int radeon_fbdev_init(struct radeon_device *rdev)
331 {
332 struct radeon_fbdev *rfbdev;
333 int bpp_sel = 32;
334 int ret;
335
336 /* don't enable fbdev if no connectors */
337 if (list_empty(&rdev->ddev->mode_config.connector_list))
338 return 0;
339
340 /* select 8 bpp console on 8MB cards, or 16 bpp on RN50 or 32MB */
341 if (rdev->mc.real_vram_size <= (8*1024*1024))
342 bpp_sel = 8;
343 else if (ASIC_IS_RN50(rdev) ||
344 rdev->mc.real_vram_size <= (32*1024*1024))
345 bpp_sel = 16;
346
347 rfbdev = kzalloc(sizeof(struct radeon_fbdev), GFP_KERNEL);
348 if (!rfbdev)
349 return -ENOMEM;
350
351 rfbdev->rdev = rdev;
352 rdev->mode_info.rfbdev = rfbdev;
353
354 drm_fb_helper_prepare(rdev->ddev, &rfbdev->helper,
355 &radeon_fb_helper_funcs);
356
357 ret = drm_fb_helper_init(rdev->ddev, &rfbdev->helper,
358 RADEONFB_CONN_LIMIT);
359 if (ret)
360 goto free;
361
362 ret = drm_fb_helper_single_add_all_connectors(&rfbdev->helper);
363 if (ret)
364 goto fini;
365
366 /* disable all the possible outputs/crtcs before entering KMS mode */
367 drm_helper_disable_unused_functions(rdev->ddev);
368
369 ret = drm_fb_helper_initial_config(&rfbdev->helper, bpp_sel);
370 if (ret)
371 goto fini;
372
373 return 0;
374
375 fini:
376 drm_fb_helper_fini(&rfbdev->helper);
377 free:
378 kfree(rfbdev);
379 return ret;
380 }
381
radeon_fbdev_fini(struct radeon_device * rdev)382 void radeon_fbdev_fini(struct radeon_device *rdev)
383 {
384 if (!rdev->mode_info.rfbdev)
385 return;
386
387 radeon_fbdev_destroy(rdev->ddev, rdev->mode_info.rfbdev);
388 kfree(rdev->mode_info.rfbdev);
389 rdev->mode_info.rfbdev = NULL;
390 }
391
radeon_fbdev_set_suspend(struct radeon_device * rdev,int state)392 void radeon_fbdev_set_suspend(struct radeon_device *rdev, int state)
393 {
394 if (rdev->mode_info.rfbdev)
395 drm_fb_helper_set_suspend(&rdev->mode_info.rfbdev->helper, state);
396 }
397
radeon_fbdev_robj_is_fb(struct radeon_device * rdev,struct radeon_bo * robj)398 bool radeon_fbdev_robj_is_fb(struct radeon_device *rdev, struct radeon_bo *robj)
399 {
400 if (!rdev->mode_info.rfbdev)
401 return false;
402
403 if (robj == gem_to_radeon_bo(rdev->mode_info.rfbdev->fb.obj[0]))
404 return true;
405 return false;
406 }
407
radeon_fb_add_connector(struct radeon_device * rdev,struct drm_connector * connector)408 void radeon_fb_add_connector(struct radeon_device *rdev, struct drm_connector *connector)
409 {
410 if (rdev->mode_info.rfbdev)
411 drm_fb_helper_add_one_connector(&rdev->mode_info.rfbdev->helper, connector);
412 }
413
radeon_fb_remove_connector(struct radeon_device * rdev,struct drm_connector * connector)414 void radeon_fb_remove_connector(struct radeon_device *rdev, struct drm_connector *connector)
415 {
416 if (rdev->mode_info.rfbdev)
417 drm_fb_helper_remove_one_connector(&rdev->mode_info.rfbdev->helper, connector);
418 }
419
