Merge git://git.kernel.org/pub/scm/linux/kernel/git/davem/net
[linux-2.6-microblaze.git] / drivers / gpu / drm / nouveau / nouveau_fbcon.c
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
54 MODULE_PARM_DESC(nofbaccel, "Disable fbcon acceleration");
55 int nouveau_nofbaccel = 0;
56 module_param_named(nofbaccel, nouveau_nofbaccel, int, 0400);
57
58 static void
59 nouveau_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         cfb_fillrect(info, rect);
88 }
89
90 static void
91 nouveau_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         cfb_copyarea(info, image);
120 }
121
122 static void
123 nouveau_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         cfb_imageblit(info, image);
152 }
153
154 static int
155 nouveau_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
181 static struct fb_ops nouveau_fbcon_ops = {
182         .owner = THIS_MODULE,
183         .fb_check_var = drm_fb_helper_check_var,
184         .fb_set_par = drm_fb_helper_set_par,
185         .fb_fillrect = nouveau_fbcon_fillrect,
186         .fb_copyarea = nouveau_fbcon_copyarea,
187         .fb_imageblit = nouveau_fbcon_imageblit,
188         .fb_sync = nouveau_fbcon_sync,
189         .fb_pan_display = drm_fb_helper_pan_display,
190         .fb_blank = drm_fb_helper_blank,
191         .fb_setcmap = drm_fb_helper_setcmap,
192         .fb_debug_enter = drm_fb_helper_debug_enter,
193         .fb_debug_leave = drm_fb_helper_debug_leave,
194 };
195
196 static struct fb_ops nouveau_fbcon_sw_ops = {
197         .owner = THIS_MODULE,
198         .fb_check_var = drm_fb_helper_check_var,
199         .fb_set_par = drm_fb_helper_set_par,
200         .fb_fillrect = cfb_fillrect,
201         .fb_copyarea = cfb_copyarea,
202         .fb_imageblit = cfb_imageblit,
203         .fb_pan_display = drm_fb_helper_pan_display,
204         .fb_blank = drm_fb_helper_blank,
205         .fb_setcmap = drm_fb_helper_setcmap,
206         .fb_debug_enter = drm_fb_helper_debug_enter,
207         .fb_debug_leave = drm_fb_helper_debug_leave,
208 };
209
210 void
211 nouveau_fbcon_accel_save_disable(struct drm_device *dev)
212 {
213         struct nouveau_drm *drm = nouveau_drm(dev);
214         if (drm->fbcon) {
215                 drm->fbcon->saved_flags = drm->fbcon->helper.fbdev->flags;
216                 drm->fbcon->helper.fbdev->flags |= FBINFO_HWACCEL_DISABLED;
217         }
218 }
219
220 void
221 nouveau_fbcon_accel_restore(struct drm_device *dev)
222 {
223         struct nouveau_drm *drm = nouveau_drm(dev);
224         if (drm->fbcon) {
225                 drm->fbcon->helper.fbdev->flags = drm->fbcon->saved_flags;
226         }
227 }
228
229 static void
230 nouveau_fbcon_accel_fini(struct drm_device *dev)
231 {
232         struct nouveau_drm *drm = nouveau_drm(dev);
233         struct nouveau_fbdev *fbcon = drm->fbcon;
234         if (fbcon && drm->channel) {
235                 console_lock();
236                 fbcon->helper.fbdev->flags |= FBINFO_HWACCEL_DISABLED;
237                 console_unlock();
238                 nouveau_channel_idle(drm->channel);
239                 nvif_object_fini(&fbcon->twod);
240                 nvif_object_fini(&fbcon->blit);
241                 nvif_object_fini(&fbcon->gdi);
242                 nvif_object_fini(&fbcon->patt);
243                 nvif_object_fini(&fbcon->rop);
244                 nvif_object_fini(&fbcon->clip);
245                 nvif_object_fini(&fbcon->surf2d);
246         }
247 }
248
249 static void
250 nouveau_fbcon_accel_init(struct drm_device *dev)
251 {
252         struct nouveau_drm *drm = nouveau_drm(dev);
253         struct nouveau_fbdev *fbcon = drm->fbcon;
254         struct fb_info *info = fbcon->helper.fbdev;
255         int ret;
256
257         if (drm->device.info.family < NV_DEVICE_INFO_V0_TESLA)
258                 ret = nv04_fbcon_accel_init(info);
259         else
260         if (drm->device.info.family < NV_DEVICE_INFO_V0_FERMI)
261                 ret = nv50_fbcon_accel_init(info);
262         else
263                 ret = nvc0_fbcon_accel_init(info);
264
265         if (ret == 0)
266                 info->fbops = &nouveau_fbcon_ops;
267 }
268
269 static void nouveau_fbcon_gamma_set(struct drm_crtc *crtc, u16 red, u16 green,
270                                     u16 blue, int regno)
271 {
272         struct nouveau_crtc *nv_crtc = nouveau_crtc(crtc);
273
274         nv_crtc->lut.r[regno] = red;
275         nv_crtc->lut.g[regno] = green;
276         nv_crtc->lut.b[regno] = blue;
277 }
278
279 static void nouveau_fbcon_gamma_get(struct drm_crtc *crtc, u16 *red, u16 *green,
280                                     u16 *blue, int regno)
281 {
282         struct nouveau_crtc *nv_crtc = nouveau_crtc(crtc);
283
284         *red = nv_crtc->lut.r[regno];
285         *green = nv_crtc->lut.g[regno];
286         *blue = nv_crtc->lut.b[regno];
287 }
288
289 static void
290 nouveau_fbcon_zfill(struct drm_device *dev, struct nouveau_fbdev *fbcon)
291 {
292         struct fb_info *info = fbcon->helper.fbdev;
293         struct fb_fillrect rect;
294
295         /* Clear the entire fbcon.  The drm will program every connector
296          * with it's preferred mode.  If the sizes differ, one display will
297          * quite likely have garbage around the console.
298          */
299         rect.dx = rect.dy = 0;
300         rect.width = info->var.xres_virtual;
301         rect.height = info->var.yres_virtual;
302         rect.color = 0;
303         rect.rop = ROP_COPY;
304         info->fbops->fb_fillrect(info, &rect);
305 }
306
307 static int
308 nouveau_fbcon_create(struct drm_fb_helper *helper,
309                      struct drm_fb_helper_surface_size *sizes)
310 {
311         struct nouveau_fbdev *fbcon =
312                 container_of(helper, struct nouveau_fbdev, helper);
313         struct drm_device *dev = fbcon->dev;
314         struct nouveau_drm *drm = nouveau_drm(dev);
315         struct nvif_device *device = &drm->device;
316         struct fb_info *info;
317         struct drm_framebuffer *fb;
318         struct nouveau_framebuffer *nouveau_fb;
319         struct nouveau_channel *chan;
320         struct nouveau_bo *nvbo;
321         struct drm_mode_fb_cmd2 mode_cmd;
322         struct pci_dev *pdev = dev->pdev;
323         int size, ret;
324
325         mode_cmd.width = sizes->surface_width;
326         mode_cmd.height = sizes->surface_height;
327
328         mode_cmd.pitches[0] = mode_cmd.width * (sizes->surface_bpp >> 3);
329         mode_cmd.pitches[0] = roundup(mode_cmd.pitches[0], 256);
330
331         mode_cmd.pixel_format = drm_mode_legacy_fb_format(sizes->surface_bpp,
332                                                           sizes->surface_depth);
333
334         size = mode_cmd.pitches[0] * mode_cmd.height;
335         size = roundup(size, PAGE_SIZE);
336
337         ret = nouveau_gem_new(dev, size, 0, NOUVEAU_GEM_DOMAIN_VRAM,
338                               0, 0x0000, &nvbo);
339         if (ret) {
340                 NV_ERROR(drm, "failed to allocate framebuffer\n");
341                 goto out;
342         }
343
344         ret = nouveau_bo_pin(nvbo, TTM_PL_FLAG_VRAM, false);
345         if (ret) {
346                 NV_ERROR(drm, "failed to pin fb: %d\n", ret);
347                 goto out_unref;
348         }
349
350         ret = nouveau_bo_map(nvbo);
351         if (ret) {
352                 NV_ERROR(drm, "failed to map fb: %d\n", ret);
353                 goto out_unpin;
354         }
355
356         chan = nouveau_nofbaccel ? NULL : drm->channel;
357         if (chan && device->info.family >= NV_DEVICE_INFO_V0_TESLA) {
358                 ret = nouveau_bo_vma_add(nvbo, drm->client.vm,
359                                         &fbcon->nouveau_fb.vma);
360                 if (ret) {
361                         NV_ERROR(drm, "failed to map fb into chan: %d\n", ret);
362                         chan = NULL;
363                 }
364         }
365
366         mutex_lock(&dev->struct_mutex);
367
368         info = framebuffer_alloc(0, &pdev->dev);
369         if (!info) {
370                 ret = -ENOMEM;
371                 goto out_unlock;
372         }
373         info->skip_vt_switch = 1;
374
375         ret = fb_alloc_cmap(&info->cmap, 256, 0);
376         if (ret) {
377                 ret = -ENOMEM;
378                 framebuffer_release(info);
379                 goto out_unlock;
380         }
381
382         info->par = fbcon;
383
384         nouveau_framebuffer_init(dev, &fbcon->nouveau_fb, &mode_cmd, nvbo);
385
386         nouveau_fb = &fbcon->nouveau_fb;
387         fb = &nouveau_fb->base;
388
389         /* setup helper */
390         fbcon->helper.fb = fb;
391         fbcon->helper.fbdev = info;
392
393         strcpy(info->fix.id, "nouveaufb");
394         if (!chan)
395                 info->flags = FBINFO_DEFAULT | FBINFO_HWACCEL_DISABLED;
396         else
397                 info->flags = FBINFO_DEFAULT | FBINFO_HWACCEL_COPYAREA |
398                               FBINFO_HWACCEL_FILLRECT |
399                               FBINFO_HWACCEL_IMAGEBLIT;
400         info->flags |= FBINFO_CAN_FORCE_OUTPUT;
401         info->fbops = &nouveau_fbcon_sw_ops;
402         info->fix.smem_start = nvbo->bo.mem.bus.base +
403                                nvbo->bo.mem.bus.offset;
404         info->fix.smem_len = size;
405
406         info->screen_base = nvbo_kmap_obj_iovirtual(nouveau_fb->nvbo);
407         info->screen_size = size;
408
409         drm_fb_helper_fill_fix(info, fb->pitches[0], fb->depth);
410         drm_fb_helper_fill_var(info, &fbcon->helper, sizes->fb_width, sizes->fb_height);
411
412         /* Use default scratch pixmap (info->pixmap.flags = FB_PIXMAP_SYSTEM) */
413
414         mutex_unlock(&dev->struct_mutex);
415
416         if (chan)
417                 nouveau_fbcon_accel_init(dev);
418         nouveau_fbcon_zfill(dev, fbcon);
419
420         /* To allow resizeing without swapping buffers */
421         NV_INFO(drm, "allocated %dx%d fb: 0x%llx, bo %p\n",
422                 nouveau_fb->base.width, nouveau_fb->base.height,
423                 nvbo->bo.offset, nvbo);
424
425         vga_switcheroo_client_fb_set(dev->pdev, info);
426         return 0;
427
428 out_unlock:
429         mutex_unlock(&dev->struct_mutex);
430         if (chan)
431                 nouveau_bo_vma_del(nvbo, &fbcon->nouveau_fb.vma);
432         nouveau_bo_unmap(nvbo);
433 out_unpin:
434         nouveau_bo_unpin(nvbo);
435 out_unref:
436         nouveau_bo_ref(NULL, &nvbo);
437 out:
438         return ret;
439 }
440
441 void
442 nouveau_fbcon_output_poll_changed(struct drm_device *dev)
443 {
444         struct nouveau_drm *drm = nouveau_drm(dev);
445         if (drm->fbcon)
446                 drm_fb_helper_hotplug_event(&drm->fbcon->helper);
447 }
448
449 static int
450 nouveau_fbcon_destroy(struct drm_device *dev, struct nouveau_fbdev *fbcon)
451 {
452         struct nouveau_framebuffer *nouveau_fb = &fbcon->nouveau_fb;
453         struct fb_info *info;
454
455         if (fbcon->helper.fbdev) {
456                 info = fbcon->helper.fbdev;
457                 unregister_framebuffer(info);
458                 if (info->cmap.len)
459                         fb_dealloc_cmap(&info->cmap);
460                 framebuffer_release(info);
461         }
462
463         if (nouveau_fb->nvbo) {
464                 nouveau_bo_unmap(nouveau_fb->nvbo);
465                 nouveau_bo_vma_del(nouveau_fb->nvbo, &nouveau_fb->vma);
466                 nouveau_bo_unpin(nouveau_fb->nvbo);
467                 drm_gem_object_unreference_unlocked(&nouveau_fb->nvbo->gem);
468                 nouveau_fb->nvbo = NULL;
469         }
470         drm_fb_helper_fini(&fbcon->helper);
471         drm_framebuffer_unregister_private(&nouveau_fb->base);
472         drm_framebuffer_cleanup(&nouveau_fb->base);
473         return 0;
474 }
475
476 void nouveau_fbcon_gpu_lockup(struct fb_info *info)
477 {
478         struct nouveau_fbdev *fbcon = info->par;
479         struct nouveau_drm *drm = nouveau_drm(fbcon->dev);
480
481         NV_ERROR(drm, "GPU lockup - switching to software fbcon\n");
482         info->flags |= FBINFO_HWACCEL_DISABLED;
483 }
484
485 static const struct drm_fb_helper_funcs nouveau_fbcon_helper_funcs = {
486         .gamma_set = nouveau_fbcon_gamma_set,
487         .gamma_get = nouveau_fbcon_gamma_get,
488         .fb_probe = nouveau_fbcon_create,
489 };
490
491 void
492 nouveau_fbcon_set_suspend(struct drm_device *dev, int state)
493 {
494         struct nouveau_drm *drm = nouveau_drm(dev);
495         if (drm->fbcon) {
496                 console_lock();
497                 if (state == FBINFO_STATE_RUNNING)
498                         nouveau_fbcon_accel_restore(dev);
499                 fb_set_suspend(drm->fbcon->helper.fbdev, state);
500                 if (state != FBINFO_STATE_RUNNING)
501                         nouveau_fbcon_accel_save_disable(dev);
502                 console_unlock();
503         }
504 }
505
506 int
507 nouveau_fbcon_init(struct drm_device *dev)
508 {
509         struct nouveau_drm *drm = nouveau_drm(dev);
510         struct nouveau_fbdev *fbcon;
511         int preferred_bpp;
512         int ret;
513
514         if (!dev->mode_config.num_crtc ||
515             (dev->pdev->class >> 8) != PCI_CLASS_DISPLAY_VGA)
516                 return 0;
517
518         fbcon = kzalloc(sizeof(struct nouveau_fbdev), GFP_KERNEL);
519         if (!fbcon)
520                 return -ENOMEM;
521
522         fbcon->dev = dev;
523         drm->fbcon = fbcon;
524
525         drm_fb_helper_prepare(dev, &fbcon->helper, &nouveau_fbcon_helper_funcs);
526
527         ret = drm_fb_helper_init(dev, &fbcon->helper,
528                                  dev->mode_config.num_crtc, 4);
529         if (ret)
530                 goto free;
531
532         ret = drm_fb_helper_single_add_all_connectors(&fbcon->helper);
533         if (ret)
534                 goto fini;
535
536         if (drm->device.info.ram_size <= 32 * 1024 * 1024)
537                 preferred_bpp = 8;
538         else
539         if (drm->device.info.ram_size <= 64 * 1024 * 1024)
540                 preferred_bpp = 16;
541         else
542                 preferred_bpp = 32;
543
544         /* disable all the possible outputs/crtcs before entering KMS mode */
545         drm_helper_disable_unused_functions(dev);
546
547         ret = drm_fb_helper_initial_config(&fbcon->helper, preferred_bpp);
548         if (ret)
549                 goto fini;
550
551         return 0;
552
553 fini:
554         drm_fb_helper_fini(&fbcon->helper);
555 free:
556         kfree(fbcon);
557         return ret;
558 }
559
560 void
561 nouveau_fbcon_fini(struct drm_device *dev)
562 {
563         struct nouveau_drm *drm = nouveau_drm(dev);
564
565         if (!drm->fbcon)
566                 return;
567
568         nouveau_fbcon_accel_fini(dev);
569         nouveau_fbcon_destroy(dev, drm->fbcon);
570         kfree(drm->fbcon);
571         drm->fbcon = NULL;
572 }