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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/module.h>
28#include <linux/kernel.h>
29#include <linux/errno.h>
30#include <linux/string.h>
31#include <linux/mm.h>
32#include <linux/tty.h>
33#include <linux/sysrq.h>
34#include <linux/delay.h>
35#include <linux/fb.h>
36#include <linux/init.h>
37#include <linux/screen_info.h>
38#include <linux/vga_switcheroo.h>
39#include <linux/console.h>
40
41#include <drm/drmP.h>
42#include <drm/drm_crtc.h>
43#include <drm/drm_crtc_helper.h>
44#include <drm/drm_fb_helper.h>
45
46#include "nouveau_drm.h"
47#include "nouveau_gem.h"
48#include "nouveau_bo.h"
49#include "nouveau_fbcon.h"
50#include "nouveau_chan.h"
51
52#include "nouveau_crtc.h"
53
54MODULE_PARM_DESC(nofbaccel, "Disable fbcon acceleration");
55int nouveau_nofbaccel = 0;
56module_param_named(nofbaccel, nouveau_nofbaccel, int, 0400);
57
58static void
59nouveau_fbcon_fillrect(struct fb_info *info, const struct fb_fillrect *rect)
60{
61 struct nouveau_fbdev *fbcon = info->par;
62 struct nouveau_drm *drm = nouveau_drm(fbcon->dev);
63 struct nvif_device *device = &drm->device;
64 int ret;
65
66 if (info->state != FBINFO_STATE_RUNNING)
67 return;
68
69 ret = -ENODEV;
70 if (!in_interrupt() && !(info->flags & FBINFO_HWACCEL_DISABLED) &&
71 mutex_trylock(&drm->client.mutex)) {
72 if (device->info.family < NV_DEVICE_INFO_V0_TESLA)
73 ret = nv04_fbcon_fillrect(info, rect);
74 else
75 if (device->info.family < NV_DEVICE_INFO_V0_FERMI)
76 ret = nv50_fbcon_fillrect(info, rect);
77 else
78 ret = nvc0_fbcon_fillrect(info, rect);
79 mutex_unlock(&drm->client.mutex);
80 }
81
82 if (ret == 0)
83 return;
84
85 if (ret != -ENODEV)
86 nouveau_fbcon_gpu_lockup(info);
87 drm_fb_helper_cfb_fillrect(info, rect);
88}
89
90static void
91nouveau_fbcon_copyarea(struct fb_info *info, const struct fb_copyarea *image)
92{
93 struct nouveau_fbdev *fbcon = info->par;
94 struct nouveau_drm *drm = nouveau_drm(fbcon->dev);
95 struct nvif_device *device = &drm->device;
96 int ret;
97
98 if (info->state != FBINFO_STATE_RUNNING)
99 return;
100
101 ret = -ENODEV;
102 if (!in_interrupt() && !(info->flags & FBINFO_HWACCEL_DISABLED) &&
103 mutex_trylock(&drm->client.mutex)) {
104 if (device->info.family < NV_DEVICE_INFO_V0_TESLA)
105 ret = nv04_fbcon_copyarea(info, image);
106 else
107 if (device->info.family < NV_DEVICE_INFO_V0_FERMI)
108 ret = nv50_fbcon_copyarea(info, image);
109 else
110 ret = nvc0_fbcon_copyarea(info, image);
111 mutex_unlock(&drm->client.mutex);
112 }
113
114 if (ret == 0)
115 return;
116
117 if (ret != -ENODEV)
118 nouveau_fbcon_gpu_lockup(info);
119 drm_fb_helper_cfb_copyarea(info, image);
120}
121
122static void
123nouveau_fbcon_imageblit(struct fb_info *info, const struct fb_image *image)
124{
125 struct nouveau_fbdev *fbcon = info->par;
126 struct nouveau_drm *drm = nouveau_drm(fbcon->dev);
127 struct nvif_device *device = &drm->device;
128 int ret;
129
130 if (info->state != FBINFO_STATE_RUNNING)
131 return;
132
133 ret = -ENODEV;
134 if (!in_interrupt() && !(info->flags & FBINFO_HWACCEL_DISABLED) &&
135 mutex_trylock(&drm->client.mutex)) {
136 if (device->info.family < NV_DEVICE_INFO_V0_TESLA)
137 ret = nv04_fbcon_imageblit(info, image);
138 else
139 if (device->info.family < NV_DEVICE_INFO_V0_FERMI)
140 ret = nv50_fbcon_imageblit(info, image);
141 else
142 ret = nvc0_fbcon_imageblit(info, image);
143 mutex_unlock(&drm->client.mutex);
144 }
145
146 if (ret == 0)
147 return;
148
149 if (ret != -ENODEV)
150 nouveau_fbcon_gpu_lockup(info);
151 drm_fb_helper_cfb_imageblit(info, image);
152}
153
154static int
155nouveau_fbcon_sync(struct fb_info *info)
156{
157 struct nouveau_fbdev *fbcon = info->par;
158 struct nouveau_drm *drm = nouveau_drm(fbcon->dev);
159 struct nouveau_channel *chan = drm->channel;
160 int ret;
161
162 if (!chan || !chan->accel_done || in_interrupt() ||
163 info->state != FBINFO_STATE_RUNNING ||
164 info->flags & FBINFO_HWACCEL_DISABLED)
165 return 0;
166
167 if (!mutex_trylock(&drm->client.mutex))
168 return 0;
169
170 ret = nouveau_channel_idle(chan);
171 mutex_unlock(&drm->client.mutex);
172 if (ret) {
173 nouveau_fbcon_gpu_lockup(info);
174 return 0;
175 }
176
177 chan->accel_done = false;
178 return 0;
179}
180
181static int
182nouveau_fbcon_open(struct fb_info *info, int user)
183{
184 struct nouveau_fbdev *fbcon = info->par;
185 struct nouveau_drm *drm = nouveau_drm(fbcon->dev);
186 int ret = pm_runtime_get_sync(drm->dev->dev);
187 if (ret < 0 && ret != -EACCES)
188 return ret;
189 return 0;
190}
191
192static int
193nouveau_fbcon_release(struct fb_info *info, int user)
194{
195 struct nouveau_fbdev *fbcon = info->par;
196 struct nouveau_drm *drm = nouveau_drm(fbcon->dev);
197 pm_runtime_put(drm->dev->dev);
198 return 0;
199}
200
201static struct fb_ops nouveau_fbcon_ops = {
202 .owner = THIS_MODULE,
203 .fb_open = nouveau_fbcon_open,
204 .fb_release = nouveau_fbcon_release,
205 .fb_check_var = drm_fb_helper_check_var,
206 .fb_set_par = drm_fb_helper_set_par,
207 .fb_fillrect = nouveau_fbcon_fillrect,
208 .fb_copyarea = nouveau_fbcon_copyarea,
209 .fb_imageblit = nouveau_fbcon_imageblit,
210 .fb_sync = nouveau_fbcon_sync,
211 .fb_pan_display = drm_fb_helper_pan_display,
212 .fb_blank = drm_fb_helper_blank,
213 .fb_setcmap = drm_fb_helper_setcmap,
214 .fb_debug_enter = drm_fb_helper_debug_enter,
215 .fb_debug_leave = drm_fb_helper_debug_leave,
216};
217
218static struct fb_ops nouveau_fbcon_sw_ops = {
219 .owner = THIS_MODULE,
220 .fb_open = nouveau_fbcon_open,
221 .fb_release = nouveau_fbcon_release,
222 .fb_check_var = drm_fb_helper_check_var,
223 .fb_set_par = drm_fb_helper_set_par,
224 .fb_fillrect = drm_fb_helper_cfb_fillrect,
225 .fb_copyarea = drm_fb_helper_cfb_copyarea,
226 .fb_imageblit = drm_fb_helper_cfb_imageblit,
227 .fb_pan_display = drm_fb_helper_pan_display,
228 .fb_blank = drm_fb_helper_blank,
229 .fb_setcmap = drm_fb_helper_setcmap,
230 .fb_debug_enter = drm_fb_helper_debug_enter,
231 .fb_debug_leave = drm_fb_helper_debug_leave,
232};
233
234void
235nouveau_fbcon_accel_save_disable(struct drm_device *dev)
236{
237 struct nouveau_drm *drm = nouveau_drm(dev);
238 if (drm->fbcon) {
239 drm->fbcon->saved_flags = drm->fbcon->helper.fbdev->flags;
240 drm->fbcon->helper.fbdev->flags |= FBINFO_HWACCEL_DISABLED;
241 }
242}
243
244void
245nouveau_fbcon_accel_restore(struct drm_device *dev)
246{
247 struct nouveau_drm *drm = nouveau_drm(dev);
248 if (drm->fbcon) {
249 drm->fbcon->helper.fbdev->flags = drm->fbcon->saved_flags;
250 }
251}
252
253static void
254nouveau_fbcon_accel_fini(struct drm_device *dev)
255{
256 struct nouveau_drm *drm = nouveau_drm(dev);
257 struct nouveau_fbdev *fbcon = drm->fbcon;
258 if (fbcon && drm->channel) {
259 console_lock();
260 fbcon->helper.fbdev->flags |= FBINFO_HWACCEL_DISABLED;
261 console_unlock();
262 nouveau_channel_idle(drm->channel);
263 nvif_object_fini(&fbcon->twod);
264 nvif_object_fini(&fbcon->blit);
265 nvif_object_fini(&fbcon->gdi);
266 nvif_object_fini(&fbcon->patt);
267 nvif_object_fini(&fbcon->rop);
268 nvif_object_fini(&fbcon->clip);
269 nvif_object_fini(&fbcon->surf2d);
270 }
271}
272
273static void
274nouveau_fbcon_accel_init(struct drm_device *dev)
275{
276 struct nouveau_drm *drm = nouveau_drm(dev);
277 struct nouveau_fbdev *fbcon = drm->fbcon;
278 struct fb_info *info = fbcon->helper.fbdev;
279 int ret;
280
281 if (drm->device.info.family < NV_DEVICE_INFO_V0_TESLA)
282 ret = nv04_fbcon_accel_init(info);
283 else
284 if (drm->device.info.family < NV_DEVICE_INFO_V0_FERMI)
285 ret = nv50_fbcon_accel_init(info);
286 else
287 ret = nvc0_fbcon_accel_init(info);
288
289 if (ret == 0)
290 info->fbops = &nouveau_fbcon_ops;
291}
292
293static void nouveau_fbcon_gamma_set(struct drm_crtc *crtc, u16 red, u16 green,
294 u16 blue, int regno)
295{
296 struct nouveau_crtc *nv_crtc = nouveau_crtc(crtc);
297
298 nv_crtc->lut.r[regno] = red;
299 nv_crtc->lut.g[regno] = green;
300 nv_crtc->lut.b[regno] = blue;
301}
302
303static void nouveau_fbcon_gamma_get(struct drm_crtc *crtc, u16 *red, u16 *green,
304 u16 *blue, int regno)
305{
306 struct nouveau_crtc *nv_crtc = nouveau_crtc(crtc);
307
308 *red = nv_crtc->lut.r[regno];
309 *green = nv_crtc->lut.g[regno];
310 *blue = nv_crtc->lut.b[regno];
311}
312
313static void
314nouveau_fbcon_zfill(struct drm_device *dev, struct nouveau_fbdev *fbcon)
315{
316 struct fb_info *info = fbcon->helper.fbdev;
317 struct fb_fillrect rect;
318
319 /* Clear the entire fbcon. The drm will program every connector
320 * with it's preferred mode. If the sizes differ, one display will
321 * quite likely have garbage around the console.
322 */
323 rect.dx = rect.dy = 0;
324 rect.width = info->var.xres_virtual;
325 rect.height = info->var.yres_virtual;
326 rect.color = 0;
327 rect.rop = ROP_COPY;
328 info->fbops->fb_fillrect(info, &rect);
329}
330
331static int
332nouveau_fbcon_create(struct drm_fb_helper *helper,
333 struct drm_fb_helper_surface_size *sizes)
334{
335 struct nouveau_fbdev *fbcon =
336 container_of(helper, struct nouveau_fbdev, helper);
337 struct drm_device *dev = fbcon->dev;
338 struct nouveau_drm *drm = nouveau_drm(dev);
339 struct nvif_device *device = &drm->device;
340 struct fb_info *info;
341 struct drm_framebuffer *fb;
342 struct nouveau_framebuffer *nouveau_fb;
343 struct nouveau_channel *chan;
344 struct nouveau_bo *nvbo;
345 struct drm_mode_fb_cmd2 mode_cmd;
346 int size, ret;
347
348 mode_cmd.width = sizes->surface_width;
349 mode_cmd.height = sizes->surface_height;
350
351 mode_cmd.pitches[0] = mode_cmd.width * (sizes->surface_bpp >> 3);
352 mode_cmd.pitches[0] = roundup(mode_cmd.pitches[0], 256);
353
354 mode_cmd.pixel_format = drm_mode_legacy_fb_format(sizes->surface_bpp,
355 sizes->surface_depth);
356
357 size = mode_cmd.pitches[0] * mode_cmd.height;
358 size = roundup(size, PAGE_SIZE);
359
360 ret = nouveau_gem_new(dev, size, 0, NOUVEAU_GEM_DOMAIN_VRAM,
361 0, 0x0000, &nvbo);
362 if (ret) {
363 NV_ERROR(drm, "failed to allocate framebuffer\n");
364 goto out;
365 }
366
367 ret = nouveau_bo_pin(nvbo, TTM_PL_FLAG_VRAM, false);
368 if (ret) {
369 NV_ERROR(drm, "failed to pin fb: %d\n", ret);
370 goto out_unref;
371 }
372
373 ret = nouveau_bo_map(nvbo);
374 if (ret) {
375 NV_ERROR(drm, "failed to map fb: %d\n", ret);
376 goto out_unpin;
377 }
378
379 chan = nouveau_nofbaccel ? NULL : drm->channel;
380 if (chan && device->info.family >= NV_DEVICE_INFO_V0_TESLA) {
381 ret = nouveau_bo_vma_add(nvbo, drm->client.vm,
382 &fbcon->nouveau_fb.vma);
383 if (ret) {
384 NV_ERROR(drm, "failed to map fb into chan: %d\n", ret);
385 chan = NULL;
386 }
387 }
388
389 mutex_lock(&dev->struct_mutex);
390
391 info = drm_fb_helper_alloc_fbi(helper);
392 if (IS_ERR(info)) {
393 ret = PTR_ERR(info);
394 goto out_unlock;
395 }
396 info->skip_vt_switch = 1;
397
398 info->par = fbcon;
399
400 nouveau_framebuffer_init(dev, &fbcon->nouveau_fb, &mode_cmd, nvbo);
401
402 nouveau_fb = &fbcon->nouveau_fb;
403 fb = &nouveau_fb->base;
404
405 /* setup helper */
406 fbcon->helper.fb = fb;
407
408 strcpy(info->fix.id, "nouveaufb");
409 if (!chan)
410 info->flags = FBINFO_DEFAULT | FBINFO_HWACCEL_DISABLED;
411 else
412 info->flags = FBINFO_DEFAULT | FBINFO_HWACCEL_COPYAREA |
413 FBINFO_HWACCEL_FILLRECT |
414 FBINFO_HWACCEL_IMAGEBLIT;
415 info->flags |= FBINFO_CAN_FORCE_OUTPUT;
416 info->fbops = &nouveau_fbcon_sw_ops;
417 info->fix.smem_start = nvbo->bo.mem.bus.base +
418 nvbo->bo.mem.bus.offset;
419 info->fix.smem_len = size;
420
421 info->screen_base = nvbo_kmap_obj_iovirtual(nouveau_fb->nvbo);
422 info->screen_size = size;
423
424 drm_fb_helper_fill_fix(info, fb->pitches[0], fb->depth);
425 drm_fb_helper_fill_var(info, &fbcon->helper, sizes->fb_width, sizes->fb_height);
426
427 /* Use default scratch pixmap (info->pixmap.flags = FB_PIXMAP_SYSTEM) */
428
429 mutex_unlock(&dev->struct_mutex);
430
431 if (chan)
432 nouveau_fbcon_accel_init(dev);
433 nouveau_fbcon_zfill(dev, fbcon);
434
435 /* To allow resizeing without swapping buffers */
436 NV_INFO(drm, "allocated %dx%d fb: 0x%llx, bo %p\n",
437 nouveau_fb->base.width, nouveau_fb->base.height,
438 nvbo->bo.offset, nvbo);
439
440 vga_switcheroo_client_fb_set(dev->pdev, info);
441 return 0;
442
443out_unlock:
444 mutex_unlock(&dev->struct_mutex);
445 if (chan)
446 nouveau_bo_vma_del(nvbo, &fbcon->nouveau_fb.vma);
447 nouveau_bo_unmap(nvbo);
448out_unpin:
449 nouveau_bo_unpin(nvbo);
450out_unref:
451 nouveau_bo_ref(NULL, &nvbo);
452out:
453 return ret;
454}
455
456void
457nouveau_fbcon_output_poll_changed(struct drm_device *dev)
458{
459 struct nouveau_drm *drm = nouveau_drm(dev);
460 if (drm->fbcon)
461 drm_fb_helper_hotplug_event(&drm->fbcon->helper);
462}
463
464static int
465nouveau_fbcon_destroy(struct drm_device *dev, struct nouveau_fbdev *fbcon)
466{
467 struct nouveau_framebuffer *nouveau_fb = &fbcon->nouveau_fb;
468
469 drm_fb_helper_unregister_fbi(&fbcon->helper);
470 drm_fb_helper_release_fbi(&fbcon->helper);
471
472 if (nouveau_fb->nvbo) {
473 nouveau_bo_unmap(nouveau_fb->nvbo);
474 nouveau_bo_vma_del(nouveau_fb->nvbo, &nouveau_fb->vma);
475 nouveau_bo_unpin(nouveau_fb->nvbo);
476 drm_gem_object_unreference_unlocked(&nouveau_fb->nvbo->gem);
477 nouveau_fb->nvbo = NULL;
478 }
479 drm_fb_helper_fini(&fbcon->helper);
480 drm_framebuffer_unregister_private(&nouveau_fb->base);
481 drm_framebuffer_cleanup(&nouveau_fb->base);
482 return 0;
483}
484
485void nouveau_fbcon_gpu_lockup(struct fb_info *info)
486{
487 struct nouveau_fbdev *fbcon = info->par;
488 struct nouveau_drm *drm = nouveau_drm(fbcon->dev);
489
490 NV_ERROR(drm, "GPU lockup - switching to software fbcon\n");
491 info->flags |= FBINFO_HWACCEL_DISABLED;
492}
493
494static const struct drm_fb_helper_funcs nouveau_fbcon_helper_funcs = {
495 .gamma_set = nouveau_fbcon_gamma_set,
496 .gamma_get = nouveau_fbcon_gamma_get,
497 .fb_probe = nouveau_fbcon_create,
498};
499
500void
501nouveau_fbcon_set_suspend(struct drm_device *dev, int state)
502{
503 struct nouveau_drm *drm = nouveau_drm(dev);
504 if (drm->fbcon) {
505 console_lock();
506 if (state == FBINFO_STATE_RUNNING)
507 nouveau_fbcon_accel_restore(dev);
508 drm_fb_helper_set_suspend(&drm->fbcon->helper, state);
509 if (state != FBINFO_STATE_RUNNING)
510 nouveau_fbcon_accel_save_disable(dev);
511 console_unlock();
512 }
513}
514
515int
516nouveau_fbcon_init(struct drm_device *dev)
517{
518 struct nouveau_drm *drm = nouveau_drm(dev);
519 struct nouveau_fbdev *fbcon;
520 int preferred_bpp;
521 int ret;
522
523 if (!dev->mode_config.num_crtc ||
524 (dev->pdev->class >> 8) != PCI_CLASS_DISPLAY_VGA)
525 return 0;
526
527 fbcon = kzalloc(sizeof(struct nouveau_fbdev), GFP_KERNEL);
528 if (!fbcon)
529 return -ENOMEM;
530
531 fbcon->dev = dev;
532 drm->fbcon = fbcon;
533
534 drm_fb_helper_prepare(dev, &fbcon->helper, &nouveau_fbcon_helper_funcs);
535
536 ret = drm_fb_helper_init(dev, &fbcon->helper,
537 dev->mode_config.num_crtc, 4);
538 if (ret)
539 goto free;
540
541 ret = drm_fb_helper_single_add_all_connectors(&fbcon->helper);
542 if (ret)
543 goto fini;
544
545 if (drm->device.info.ram_size <= 32 * 1024 * 1024)
546 preferred_bpp = 8;
547 else
548 if (drm->device.info.ram_size <= 64 * 1024 * 1024)
549 preferred_bpp = 16;
550 else
551 preferred_bpp = 32;
552
553 /* disable all the possible outputs/crtcs before entering KMS mode */
554 drm_helper_disable_unused_functions(dev);
555
556 ret = drm_fb_helper_initial_config(&fbcon->helper, preferred_bpp);
557 if (ret)
558 goto fini;
559
560 return 0;
561
562fini:
563 drm_fb_helper_fini(&fbcon->helper);
564free:
565 kfree(fbcon);
566 return ret;
567}
568
569void
570nouveau_fbcon_fini(struct drm_device *dev)
571{
572 struct nouveau_drm *drm = nouveau_drm(dev);
573
574 if (!drm->fbcon)
575 return;
576
577 nouveau_fbcon_accel_fini(dev);
578 nouveau_fbcon_destroy(dev, drm->fbcon);
579 kfree(drm->fbcon);
580 drm->fbcon = NULL;
581}