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->ddev, 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
145 #ifdef __linux__
radeon_fbdev_fb_open(struct fb_info * info,int user)146 static int radeon_fbdev_fb_open(struct fb_info *info, int user)
147 {
148 struct drm_fb_helper *fb_helper = info->par;
149 struct radeon_device *rdev = fb_helper->dev->dev_private;
150 int ret;
151
152 ret = pm_runtime_get_sync(rdev->ddev->dev);
153 if (ret < 0 && ret != -EACCES)
154 goto err_pm_runtime_mark_last_busy;
155
156 return 0;
157
158 err_pm_runtime_mark_last_busy:
159 pm_runtime_mark_last_busy(rdev->ddev->dev);
160 pm_runtime_put_autosuspend(rdev->ddev->dev);
161 return ret;
162 }
163
radeon_fbdev_fb_release(struct fb_info * info,int user)164 static int radeon_fbdev_fb_release(struct fb_info *info, int user)
165 {
166 struct drm_fb_helper *fb_helper = info->par;
167 struct radeon_device *rdev = fb_helper->dev->dev_private;
168
169 pm_runtime_mark_last_busy(rdev->ddev->dev);
170 pm_runtime_put_autosuspend(rdev->ddev->dev);
171
172 return 0;
173 }
174
radeon_fbdev_fb_destroy(struct fb_info * info)175 static void radeon_fbdev_fb_destroy(struct fb_info *info)
176 {
177 struct drm_fb_helper *fb_helper = info->par;
178 struct drm_framebuffer *fb = fb_helper->fb;
179 struct drm_gem_object *gobj = drm_gem_fb_get_obj(fb, 0);
180
181 drm_fb_helper_fini(fb_helper);
182
183 drm_framebuffer_unregister_private(fb);
184 drm_framebuffer_cleanup(fb);
185 kfree(fb);
186 radeon_fbdev_destroy_pinned_object(gobj);
187
188 drm_client_release(&fb_helper->client);
189 drm_fb_helper_unprepare(fb_helper);
190 kfree(fb_helper);
191 }
192 #endif /* __linux__ */
193
194 static const struct fb_ops radeon_fbdev_fb_ops = {
195 #ifdef notyet
196 .owner = THIS_MODULE,
197 .fb_open = radeon_fbdev_fb_open,
198 .fb_release = radeon_fbdev_fb_release,
199 FB_DEFAULT_IOMEM_OPS,
200 DRM_FB_HELPER_DEFAULT_OPS,
201 .fb_destroy = radeon_fbdev_fb_destroy,
202 #else
203 DRM_FB_HELPER_DEFAULT_OPS,
204 #endif
205 };
206
207 /*
208 * Fbdev helpers and struct drm_fb_helper_funcs
209 */
210
radeon_fbdev_fb_helper_fb_probe(struct drm_fb_helper * fb_helper,struct drm_fb_helper_surface_size * sizes)211 static int radeon_fbdev_fb_helper_fb_probe(struct drm_fb_helper *fb_helper,
212 struct drm_fb_helper_surface_size *sizes)
213 {
214 struct radeon_device *rdev = fb_helper->dev->dev_private;
215 struct drm_mode_fb_cmd2 mode_cmd = { };
216 struct fb_info *info;
217 struct rasops_info *ri = &rdev->ro;
218 struct drm_gem_object *gobj;
219 struct radeon_bo *rbo;
220 struct drm_framebuffer *fb;
221 int ret;
222 unsigned long tmp;
223
224 mode_cmd.width = sizes->surface_width;
225 mode_cmd.height = sizes->surface_height;
226
227 /* avivo can't scanout real 24bpp */
228 if ((sizes->surface_bpp == 24) && ASIC_IS_AVIVO(rdev))
229 sizes->surface_bpp = 32;
230
231 mode_cmd.pixel_format = drm_mode_legacy_fb_format(sizes->surface_bpp,
232 sizes->surface_depth);
233
234 ret = radeon_fbdev_create_pinned_object(fb_helper, &mode_cmd, &gobj);
235 if (ret) {
236 DRM_ERROR("failed to create fbcon object %d\n", ret);
237 return ret;
238 }
239 rbo = gem_to_radeon_bo(gobj);
240
241 fb = kzalloc(sizeof(*fb), GFP_KERNEL);
242 if (!fb) {
243 ret = -ENOMEM;
244 goto err_radeon_fbdev_destroy_pinned_object;
245 }
246 ret = radeon_framebuffer_init(rdev->ddev, fb, &mode_cmd, gobj);
247 if (ret) {
248 DRM_ERROR("failed to initialize framebuffer %d\n", ret);
249 goto err_kfree;
250 }
251
252 /* setup helper */
253 fb_helper->fb = fb;
254
255 /* okay we have an object now allocate the framebuffer */
256 info = drm_fb_helper_alloc_info(fb_helper);
257 if (IS_ERR(info)) {
258 ret = PTR_ERR(info);
259 goto err_drm_framebuffer_unregister_private;
260 }
261
262 info->fbops = &radeon_fbdev_fb_ops;
263
264 /* radeon resume is fragile and needs a vt switch to help it along */
265 info->skip_vt_switch = false;
266
267 drm_fb_helper_fill_info(info, fb_helper, sizes);
268
269 tmp = radeon_bo_gpu_offset(rbo) - rdev->mc.vram_start;
270 info->fix.smem_start = rdev->mc.aper_base + tmp;
271 info->fix.smem_len = radeon_bo_size(rbo);
272 info->screen_base = (__force void __iomem *)rbo->kptr;
273 info->screen_size = radeon_bo_size(rbo);
274
275 memset_io(info->screen_base, 0, info->screen_size);
276
277 /* Use default scratch pixmap (info->pixmap.flags = FB_PIXMAP_SYSTEM) */
278
279 DRM_INFO("fb mappable at 0x%lX\n", info->fix.smem_start);
280 DRM_INFO("vram apper at 0x%lX\n", (unsigned long)rdev->mc.aper_base);
281 DRM_INFO("size %lu\n", (unsigned long)radeon_bo_size(rbo));
282 DRM_INFO("fb depth is %d\n", fb->format->depth);
283 DRM_INFO(" pitch is %d\n", fb->pitches[0]);
284
285 ri->ri_bits = rbo->kptr;
286 ri->ri_depth = fb->format->cpp[0] * 8;
287 ri->ri_stride = fb->pitches[0];
288 ri->ri_width = sizes->fb_width;
289 ri->ri_height = sizes->fb_height;
290
291 switch (fb->format->format) {
292 case DRM_FORMAT_XRGB8888:
293 ri->ri_rnum = 8;
294 ri->ri_rpos = 16;
295 ri->ri_gnum = 8;
296 ri->ri_gpos = 8;
297 ri->ri_bnum = 8;
298 ri->ri_bpos = 0;
299 break;
300 case DRM_FORMAT_RGB565:
301 ri->ri_rnum = 5;
302 ri->ri_rpos = 11;
303 ri->ri_gnum = 6;
304 ri->ri_gpos = 5;
305 ri->ri_bnum = 5;
306 ri->ri_bpos = 0;
307 break;
308 }
309
310 return 0;
311
312 err_drm_framebuffer_unregister_private:
313 fb_helper->fb = NULL;
314 drm_framebuffer_unregister_private(fb);
315 drm_framebuffer_cleanup(fb);
316 err_kfree:
317 kfree(fb);
318 err_radeon_fbdev_destroy_pinned_object:
319 radeon_fbdev_destroy_pinned_object(gobj);
320 return ret;
321 }
322
323 static const struct drm_fb_helper_funcs radeon_fbdev_fb_helper_funcs = {
324 .fb_probe = radeon_fbdev_fb_helper_fb_probe,
325 };
326
327 /*
328 * Fbdev client and struct drm_client_funcs
329 */
330
radeon_fbdev_client_unregister(struct drm_client_dev * client)331 static void radeon_fbdev_client_unregister(struct drm_client_dev *client)
332 {
333 struct drm_fb_helper *fb_helper = drm_fb_helper_from_client(client);
334 struct drm_device *dev = fb_helper->dev;
335 struct radeon_device *rdev = dev->dev_private;
336
337 if (fb_helper->info) {
338 vga_switcheroo_client_fb_set(rdev->pdev, NULL);
339 drm_helper_force_disable_all(dev);
340 drm_fb_helper_unregister_info(fb_helper);
341 } else {
342 drm_client_release(&fb_helper->client);
343 drm_fb_helper_unprepare(fb_helper);
344 kfree(fb_helper);
345 }
346 }
347
348 #ifdef __sparc64__
349 void radeondrm_setcolor(void *, u_int, u_int8_t, u_int8_t, u_int8_t);
350 #endif
351
352 void radeondrm_burner_cb(void *);
353
radeon_fbdev_client_restore(struct drm_client_dev * client)354 static int radeon_fbdev_client_restore(struct drm_client_dev *client)
355 {
356 #ifdef __sparc64__
357 struct radeon_device *rdev = client->dev->dev_private;
358 fbwscons_setcolormap(&rdev->sf, radeondrm_setcolor);
359 #endif
360 drm_fb_helper_lastclose(client->dev);
361 vga_switcheroo_process_delayed_switch();
362
363 return 0;
364 }
365
radeon_fbdev_client_hotplug(struct drm_client_dev * client)366 static int radeon_fbdev_client_hotplug(struct drm_client_dev *client)
367 {
368 struct drm_fb_helper *fb_helper = drm_fb_helper_from_client(client);
369 struct drm_device *dev = client->dev;
370 struct radeon_device *rdev = dev->dev_private;
371 int ret;
372
373 if (dev->fb_helper)
374 return drm_fb_helper_hotplug_event(dev->fb_helper);
375
376 ret = drm_fb_helper_init(dev, fb_helper);
377 if (ret)
378 goto err_drm_err;
379
380 task_set(&rdev->burner_task, radeondrm_burner_cb, rdev);
381
382 #ifdef __sparc64__
383 {
384 struct drm_connector_list_iter conn_iter;
385 struct drm_connector *connector;
386 struct drm_cmdline_mode *mode;
387
388 drm_connector_list_iter_begin(fb_helper->dev, &conn_iter);
389 drm_client_for_each_connector_iter(connector, &conn_iter) {
390 mode = &connector->cmdline_mode;
391
392 mode->specified = true;
393 mode->xres = rdev->sf.sf_width;
394 mode->yres = rdev->sf.sf_height;
395 mode->bpp_specified = true;
396 mode->bpp = rdev->sf.sf_depth;
397 }
398 drm_connector_list_iter_end(&conn_iter);
399 }
400 #endif
401
402 if (!drm_drv_uses_atomic_modeset(dev))
403 drm_helper_disable_unused_functions(dev);
404
405 ret = drm_fb_helper_initial_config(fb_helper);
406 if (ret)
407 goto err_drm_fb_helper_fini;
408
409 vga_switcheroo_client_fb_set(rdev->pdev, fb_helper->info);
410
411 return 0;
412
413 err_drm_fb_helper_fini:
414 drm_fb_helper_fini(fb_helper);
415 err_drm_err:
416 drm_err(dev, "Failed to setup radeon fbdev emulation (ret=%d)\n", ret);
417 return ret;
418 }
419
420 static const struct drm_client_funcs radeon_fbdev_client_funcs = {
421 .owner = THIS_MODULE,
422 .unregister = radeon_fbdev_client_unregister,
423 .restore = radeon_fbdev_client_restore,
424 .hotplug = radeon_fbdev_client_hotplug,
425 };
426
radeon_fbdev_setup(struct radeon_device * rdev)427 void radeon_fbdev_setup(struct radeon_device *rdev)
428 {
429 struct drm_fb_helper *fb_helper;
430 int bpp_sel = 32;
431 int ret;
432
433 if (rdev->mc.real_vram_size <= (8 * 1024 * 1024))
434 bpp_sel = 8;
435 else if (ASIC_IS_RN50(rdev) || rdev->mc.real_vram_size <= (32 * 1024 * 1024))
436 bpp_sel = 16;
437
438 fb_helper = kzalloc(sizeof(*fb_helper), GFP_KERNEL);
439 if (!fb_helper)
440 return;
441 drm_fb_helper_prepare(rdev->ddev, fb_helper, bpp_sel, &radeon_fbdev_fb_helper_funcs);
442
443 ret = drm_client_init(rdev->ddev, &fb_helper->client, "radeon-fbdev",
444 &radeon_fbdev_client_funcs);
445 if (ret) {
446 drm_err(rdev->ddev, "Failed to register client: %d\n", ret);
447 goto err_drm_client_init;
448 }
449
450 drm_client_register(&fb_helper->client);
451
452 return;
453
454 err_drm_client_init:
455 drm_fb_helper_unprepare(fb_helper);
456 kfree(fb_helper);
457 }
458
radeon_fbdev_set_suspend(struct radeon_device * rdev,int state)459 void radeon_fbdev_set_suspend(struct radeon_device *rdev, int state)
460 {
461 if (rdev->ddev->fb_helper)
462 drm_fb_helper_set_suspend(rdev->ddev->fb_helper, state);
463 }
464
radeon_fbdev_robj_is_fb(struct radeon_device * rdev,struct radeon_bo * robj)465 bool radeon_fbdev_robj_is_fb(struct radeon_device *rdev, struct radeon_bo *robj)
466 {
467 struct drm_fb_helper *fb_helper = rdev->ddev->fb_helper;
468 struct drm_gem_object *gobj;
469
470 if (!fb_helper)
471 return false;
472
473 gobj = drm_gem_fb_get_obj(fb_helper->fb, 0);
474 if (!gobj)
475 return false;
476 if (gobj != &robj->tbo.base)
477 return false;
478
479 return true;
480 }
481
482 void
radeondrm_burner(void * v,u_int on,u_int flags)483 radeondrm_burner(void *v, u_int on, u_int flags)
484 {
485 struct rasops_info *ri = v;
486 struct radeon_device *rdev = ri->ri_hw;
487
488 task_del(systq, &rdev->burner_task);
489
490 if (on)
491 rdev->burner_fblank = FB_BLANK_UNBLANK;
492 else {
493 if (flags & WSDISPLAY_BURN_VBLANK)
494 rdev->burner_fblank = FB_BLANK_VSYNC_SUSPEND;
495 else
496 rdev->burner_fblank = FB_BLANK_NORMAL;
497 }
498
499 /*
500 * Setting the DPMS mode may sleep while waiting for vblank so
501 * hand things off to a taskq.
502 */
503 task_add(systq, &rdev->burner_task);
504 }
505
506 void
radeondrm_burner_cb(void * arg1)507 radeondrm_burner_cb(void *arg1)
508 {
509 struct radeon_device *rdev = arg1;
510 struct drm_fb_helper *helper = rdev->ddev->fb_helper;
511
512 drm_fb_helper_blank(rdev->burner_fblank, helper->info);
513 }
514