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
27 #include <linux/fb.h>
28 #include <linux/pci.h>
29 #include <linux/pm_runtime.h>
30 #include <linux/vga_switcheroo.h>
31
32 #include <drm/drm_crtc_helper.h>
33 #include <drm/drm_drv.h>
34 #include <drm/drm_fb_helper.h>
35 #include <drm/drm_fourcc.h>
36 #include <drm/drm_framebuffer.h>
37 #include <drm/drm_gem_framebuffer_helper.h>
38
39 #include "radeon.h"
40
radeon_fbdev_destroy_pinned_object(struct drm_gem_object * gobj)41 static void radeon_fbdev_destroy_pinned_object(struct drm_gem_object *gobj)
42 {
43 struct radeon_bo *rbo = gem_to_radeon_bo(gobj);
44 int ret;
45
46 ret = radeon_bo_reserve(rbo, false);
47 if (likely(ret == 0)) {
48 radeon_bo_kunmap(rbo);
49 radeon_bo_unpin(rbo);
50 radeon_bo_unreserve(rbo);
51 }
52 drm_gem_object_put(gobj);
53 }
54
radeon_fbdev_create_pinned_object(struct drm_fb_helper * fb_helper,struct drm_mode_fb_cmd2 * mode_cmd,struct drm_gem_object ** gobj_p)55 static int radeon_fbdev_create_pinned_object(struct drm_fb_helper *fb_helper,
56 struct drm_mode_fb_cmd2 *mode_cmd,
57 struct drm_gem_object **gobj_p)
58 {
59 const struct drm_format_info *info;
60 struct radeon_device *rdev = fb_helper->dev->dev_private;
61 struct drm_gem_object *gobj = NULL;
62 struct radeon_bo *rbo = NULL;
63 bool fb_tiled = false; /* useful for testing */
64 u32 tiling_flags = 0;
65 int ret;
66 int aligned_size, size;
67 int height = mode_cmd->height;
68 u32 cpp;
69
70 info = drm_get_format_info(rdev_to_drm(rdev), mode_cmd);
71 cpp = info->cpp[0];
72
73 /* need to align pitch with crtc limits */
74 mode_cmd->pitches[0] = radeon_align_pitch(rdev, mode_cmd->width, cpp,
75 fb_tiled);
76
77 if (rdev->family >= CHIP_R600)
78 height = ALIGN(mode_cmd->height, 8);
79 size = mode_cmd->pitches[0] * height;
80 aligned_size = ALIGN(size, PAGE_SIZE);
81 ret = radeon_gem_object_create(rdev, aligned_size, 0,
82 RADEON_GEM_DOMAIN_VRAM,
83 0, true, &gobj);
84 if (ret) {
85 pr_err("failed to allocate framebuffer (%d)\n", aligned_size);
86 return -ENOMEM;
87 }
88 rbo = gem_to_radeon_bo(gobj);
89
90 if (fb_tiled)
91 tiling_flags = RADEON_TILING_MACRO;
92
93 #ifdef __BIG_ENDIAN
94 switch (cpp) {
95 case 4:
96 tiling_flags |= RADEON_TILING_SWAP_32BIT;
97 break;
98 case 2:
99 tiling_flags |= RADEON_TILING_SWAP_16BIT;
100 break;
101 default:
102 break;
103 }
104 #endif
105
106 if (tiling_flags) {
107 ret = radeon_bo_set_tiling_flags(rbo,
108 tiling_flags | RADEON_TILING_SURFACE,
109 mode_cmd->pitches[0]);
110 if (ret)
111 dev_err(rdev->dev, "FB failed to set tiling flags\n");
112 }
113
114 ret = radeon_bo_reserve(rbo, false);
115 if (unlikely(ret != 0))
116 goto err_radeon_fbdev_destroy_pinned_object;
117 /* Only 27 bit offset for legacy CRTC */
118 ret = radeon_bo_pin_restricted(rbo, RADEON_GEM_DOMAIN_VRAM,
119 ASIC_IS_AVIVO(rdev) ? 0 : 1 << 27,
120 NULL);
121 if (ret) {
122 radeon_bo_unreserve(rbo);
123 goto err_radeon_fbdev_destroy_pinned_object;
124 }
125 if (fb_tiled)
126 radeon_bo_check_tiling(rbo, 0, 0);
127 ret = radeon_bo_kmap(rbo, NULL);
128 radeon_bo_unreserve(rbo);
129 if (ret)
130 goto err_radeon_fbdev_destroy_pinned_object;
131
132 *gobj_p = gobj;
133 return 0;
134
135 err_radeon_fbdev_destroy_pinned_object:
136 radeon_fbdev_destroy_pinned_object(gobj);
137 *gobj_p = NULL;
138 return ret;
139 }
140
141 /*
142 * Fbdev ops and struct fb_ops
143 */
144
radeon_fbdev_fb_open(struct fb_info * info,int user)145 static int radeon_fbdev_fb_open(struct fb_info *info, int user)
146 {
147 struct drm_fb_helper *fb_helper = info->par;
148 struct radeon_device *rdev = fb_helper->dev->dev_private;
149 int ret;
150
151 ret = pm_runtime_get_sync(rdev_to_drm(rdev)->dev);
152 if (ret < 0 && ret != -EACCES)
153 goto err_pm_runtime_mark_last_busy;
154
155 return 0;
156
157 err_pm_runtime_mark_last_busy:
158 pm_runtime_mark_last_busy(rdev_to_drm(rdev)->dev);
159 pm_runtime_put_autosuspend(rdev_to_drm(rdev)->dev);
160 return ret;
161 }
162
radeon_fbdev_fb_release(struct fb_info * info,int user)163 static int radeon_fbdev_fb_release(struct fb_info *info, int user)
164 {
165 struct drm_fb_helper *fb_helper = info->par;
166 struct radeon_device *rdev = fb_helper->dev->dev_private;
167
168 pm_runtime_mark_last_busy(rdev_to_drm(rdev)->dev);
169 pm_runtime_put_autosuspend(rdev_to_drm(rdev)->dev);
170
171 return 0;
172 }
173
radeon_fbdev_fb_destroy(struct fb_info * info)174 static void radeon_fbdev_fb_destroy(struct fb_info *info)
175 {
176 struct drm_fb_helper *fb_helper = info->par;
177 struct drm_framebuffer *fb = fb_helper->fb;
178 struct drm_gem_object *gobj = drm_gem_fb_get_obj(fb, 0);
179
180 drm_fb_helper_fini(fb_helper);
181
182 drm_framebuffer_unregister_private(fb);
183 drm_framebuffer_cleanup(fb);
184 kfree(fb);
185 radeon_fbdev_destroy_pinned_object(gobj);
186
187 drm_client_release(&fb_helper->client);
188 drm_fb_helper_unprepare(fb_helper);
189 kfree(fb_helper);
190 }
191
192 static const struct fb_ops radeon_fbdev_fb_ops = {
193 .owner = THIS_MODULE,
194 .fb_open = radeon_fbdev_fb_open,
195 .fb_release = radeon_fbdev_fb_release,
196 FB_DEFAULT_IOMEM_OPS,
197 DRM_FB_HELPER_DEFAULT_OPS,
198 .fb_destroy = radeon_fbdev_fb_destroy,
199 };
200
201 /*
202 * Fbdev helpers and struct drm_fb_helper_funcs
203 */
204
radeon_fbdev_fb_helper_fb_probe(struct drm_fb_helper * fb_helper,struct drm_fb_helper_surface_size * sizes)205 static int radeon_fbdev_fb_helper_fb_probe(struct drm_fb_helper *fb_helper,
206 struct drm_fb_helper_surface_size *sizes)
207 {
208 struct radeon_device *rdev = fb_helper->dev->dev_private;
209 struct drm_mode_fb_cmd2 mode_cmd = { };
210 struct fb_info *info;
211 struct drm_gem_object *gobj;
212 struct radeon_bo *rbo;
213 struct drm_framebuffer *fb;
214 int ret;
215 unsigned long tmp;
216
217 mode_cmd.width = sizes->surface_width;
218 mode_cmd.height = sizes->surface_height;
219
220 /* avivo can't scanout real 24bpp */
221 if ((sizes->surface_bpp == 24) && ASIC_IS_AVIVO(rdev))
222 sizes->surface_bpp = 32;
223
224 mode_cmd.pixel_format = drm_mode_legacy_fb_format(sizes->surface_bpp,
225 sizes->surface_depth);
226
227 ret = radeon_fbdev_create_pinned_object(fb_helper, &mode_cmd, &gobj);
228 if (ret) {
229 DRM_ERROR("failed to create fbcon object %d\n", ret);
230 return ret;
231 }
232 rbo = gem_to_radeon_bo(gobj);
233
234 fb = kzalloc(sizeof(*fb), GFP_KERNEL);
235 if (!fb) {
236 ret = -ENOMEM;
237 goto err_radeon_fbdev_destroy_pinned_object;
238 }
239 ret = radeon_framebuffer_init(rdev_to_drm(rdev), fb, &mode_cmd, gobj);
240 if (ret) {
241 DRM_ERROR("failed to initialize framebuffer %d\n", ret);
242 goto err_kfree;
243 }
244
245 /* setup helper */
246 fb_helper->fb = fb;
247
248 /* okay we have an object now allocate the framebuffer */
249 info = drm_fb_helper_alloc_info(fb_helper);
250 if (IS_ERR(info)) {
251 ret = PTR_ERR(info);
252 goto err_drm_framebuffer_unregister_private;
253 }
254
255 info->fbops = &radeon_fbdev_fb_ops;
256
257 /* radeon resume is fragile and needs a vt switch to help it along */
258 info->skip_vt_switch = false;
259
260 drm_fb_helper_fill_info(info, fb_helper, sizes);
261
262 tmp = radeon_bo_gpu_offset(rbo) - rdev->mc.vram_start;
263 info->fix.smem_start = rdev->mc.aper_base + tmp;
264 info->fix.smem_len = radeon_bo_size(rbo);
265 info->screen_base = (__force void __iomem *)rbo->kptr;
266 info->screen_size = radeon_bo_size(rbo);
267
268 memset_io(info->screen_base, 0, info->screen_size);
269
270 /* Use default scratch pixmap (info->pixmap.flags = FB_PIXMAP_SYSTEM) */
271
272 DRM_INFO("fb mappable at 0x%lX\n", info->fix.smem_start);
273 DRM_INFO("vram apper at 0x%lX\n", (unsigned long)rdev->mc.aper_base);
274 DRM_INFO("size %lu\n", (unsigned long)radeon_bo_size(rbo));
275 DRM_INFO("fb depth is %d\n", fb->format->depth);
276 DRM_INFO(" pitch is %d\n", fb->pitches[0]);
277
278 return 0;
279
280 err_drm_framebuffer_unregister_private:
281 fb_helper->fb = NULL;
282 drm_framebuffer_unregister_private(fb);
283 drm_framebuffer_cleanup(fb);
284 err_kfree:
285 kfree(fb);
286 err_radeon_fbdev_destroy_pinned_object:
287 radeon_fbdev_destroy_pinned_object(gobj);
288 return ret;
289 }
290
291 static const struct drm_fb_helper_funcs radeon_fbdev_fb_helper_funcs = {
292 .fb_probe = radeon_fbdev_fb_helper_fb_probe,
293 };
294
295 /*
296 * Fbdev client and struct drm_client_funcs
297 */
298
radeon_fbdev_client_unregister(struct drm_client_dev * client)299 static void radeon_fbdev_client_unregister(struct drm_client_dev *client)
300 {
301 struct drm_fb_helper *fb_helper = drm_fb_helper_from_client(client);
302 struct drm_device *dev = fb_helper->dev;
303 struct radeon_device *rdev = dev->dev_private;
304
305 if (fb_helper->info) {
306 vga_switcheroo_client_fb_set(rdev->pdev, NULL);
307 drm_helper_force_disable_all(dev);
308 drm_fb_helper_unregister_info(fb_helper);
309 } else {
310 drm_client_release(&fb_helper->client);
311 drm_fb_helper_unprepare(fb_helper);
312 kfree(fb_helper);
313 }
314 }
315
radeon_fbdev_client_restore(struct drm_client_dev * client)316 static int radeon_fbdev_client_restore(struct drm_client_dev *client)
317 {
318 drm_fb_helper_lastclose(client->dev);
319 vga_switcheroo_process_delayed_switch();
320
321 return 0;
322 }
323
radeon_fbdev_client_hotplug(struct drm_client_dev * client)324 static int radeon_fbdev_client_hotplug(struct drm_client_dev *client)
325 {
326 struct drm_fb_helper *fb_helper = drm_fb_helper_from_client(client);
327 struct drm_device *dev = client->dev;
328 struct radeon_device *rdev = dev->dev_private;
329 int ret;
330
331 if (dev->fb_helper)
332 return drm_fb_helper_hotplug_event(dev->fb_helper);
333
334 ret = drm_fb_helper_init(dev, fb_helper);
335 if (ret)
336 goto err_drm_err;
337
338 if (!drm_drv_uses_atomic_modeset(dev))
339 drm_helper_disable_unused_functions(dev);
340
341 ret = drm_fb_helper_initial_config(fb_helper);
342 if (ret)
343 goto err_drm_fb_helper_fini;
344
345 vga_switcheroo_client_fb_set(rdev->pdev, fb_helper->info);
346
347 return 0;
348
349 err_drm_fb_helper_fini:
350 drm_fb_helper_fini(fb_helper);
351 err_drm_err:
352 drm_err(dev, "Failed to setup radeon fbdev emulation (ret=%d)\n", ret);
353 return ret;
354 }
355
356 static const struct drm_client_funcs radeon_fbdev_client_funcs = {
357 .owner = THIS_MODULE,
358 .unregister = radeon_fbdev_client_unregister,
359 .restore = radeon_fbdev_client_restore,
360 .hotplug = radeon_fbdev_client_hotplug,
361 };
362
radeon_fbdev_setup(struct radeon_device * rdev)363 void radeon_fbdev_setup(struct radeon_device *rdev)
364 {
365 struct drm_fb_helper *fb_helper;
366 int bpp_sel = 32;
367 int ret;
368
369 if (rdev->mc.real_vram_size <= (8 * 1024 * 1024))
370 bpp_sel = 8;
371 else if (ASIC_IS_RN50(rdev) || rdev->mc.real_vram_size <= (32 * 1024 * 1024))
372 bpp_sel = 16;
373
374 fb_helper = kzalloc(sizeof(*fb_helper), GFP_KERNEL);
375 if (!fb_helper)
376 return;
377 drm_fb_helper_prepare(rdev_to_drm(rdev), fb_helper, bpp_sel, &radeon_fbdev_fb_helper_funcs);
378
379 ret = drm_client_init(rdev_to_drm(rdev), &fb_helper->client, "radeon-fbdev",
380 &radeon_fbdev_client_funcs);
381 if (ret) {
382 drm_err(rdev_to_drm(rdev), "Failed to register client: %d\n", ret);
383 goto err_drm_client_init;
384 }
385
386 drm_client_register(&fb_helper->client);
387
388 return;
389
390 err_drm_client_init:
391 drm_fb_helper_unprepare(fb_helper);
392 kfree(fb_helper);
393 }
394
radeon_fbdev_set_suspend(struct radeon_device * rdev,int state)395 void radeon_fbdev_set_suspend(struct radeon_device *rdev, int state)
396 {
397 if (rdev_to_drm(rdev)->fb_helper)
398 drm_fb_helper_set_suspend(rdev_to_drm(rdev)->fb_helper, state);
399 }
400
radeon_fbdev_robj_is_fb(struct radeon_device * rdev,struct radeon_bo * robj)401 bool radeon_fbdev_robj_is_fb(struct radeon_device *rdev, struct radeon_bo *robj)
402 {
403 struct drm_fb_helper *fb_helper = rdev_to_drm(rdev)->fb_helper;
404 struct drm_gem_object *gobj;
405
406 if (!fb_helper)
407 return false;
408
409 gobj = drm_gem_fb_get_obj(fb_helper->fb, 0);
410 if (!gobj)
411 return false;
412 if (gobj != &robj->tbo.base)
413 return false;
414
415 return true;
416 }
417