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 #include <core/client.h>
55 #include <core/device.h>
56
57 #include <subdev/fb.h>
58
59 MODULE_PARM_DESC(nofbaccel, "Disable fbcon acceleration");
60 static int nouveau_nofbaccel = 0;
61 module_param_named(nofbaccel, nouveau_nofbaccel, int, 0400);
62
63 static void
nouveau_fbcon_fillrect(struct fb_info * info,const struct fb_fillrect * rect)64 nouveau_fbcon_fillrect(struct fb_info *info, const struct fb_fillrect *rect)
65 {
66 struct nouveau_fbdev *fbcon = info->par;
67 struct nouveau_drm *drm = nouveau_drm(fbcon->dev);
68 struct nouveau_device *device = nv_device(drm->device);
69 int ret;
70
71 if (info->state != FBINFO_STATE_RUNNING)
72 return;
73
74 ret = -ENODEV;
75 if (!in_interrupt() && !(info->flags & FBINFO_HWACCEL_DISABLED) &&
76 mutex_trylock(&drm->client.mutex)) {
77 if (device->card_type < NV_50)
78 ret = nv04_fbcon_fillrect(info, rect);
79 else
80 if (device->card_type < NV_C0)
81 ret = nv50_fbcon_fillrect(info, rect);
82 else
83 ret = nvc0_fbcon_fillrect(info, rect);
84 mutex_unlock(&drm->client.mutex);
85 }
86
87 if (ret == 0)
88 return;
89
90 if (ret != -ENODEV)
91 nouveau_fbcon_gpu_lockup(info);
92 cfb_fillrect(info, rect);
93 }
94
95 static void
nouveau_fbcon_copyarea(struct fb_info * info,const struct fb_copyarea * image)96 nouveau_fbcon_copyarea(struct fb_info *info, const struct fb_copyarea *image)
97 {
98 struct nouveau_fbdev *fbcon = info->par;
99 struct nouveau_drm *drm = nouveau_drm(fbcon->dev);
100 struct nouveau_device *device = nv_device(drm->device);
101 int ret;
102
103 if (info->state != FBINFO_STATE_RUNNING)
104 return;
105
106 ret = -ENODEV;
107 if (!in_interrupt() && !(info->flags & FBINFO_HWACCEL_DISABLED) &&
108 mutex_trylock(&drm->client.mutex)) {
109 if (device->card_type < NV_50)
110 ret = nv04_fbcon_copyarea(info, image);
111 else
112 if (device->card_type < NV_C0)
113 ret = nv50_fbcon_copyarea(info, image);
114 else
115 ret = nvc0_fbcon_copyarea(info, image);
116 mutex_unlock(&drm->client.mutex);
117 }
118
119 if (ret == 0)
120 return;
121
122 if (ret != -ENODEV)
123 nouveau_fbcon_gpu_lockup(info);
124 cfb_copyarea(info, image);
125 }
126
127 static void
nouveau_fbcon_imageblit(struct fb_info * info,const struct fb_image * image)128 nouveau_fbcon_imageblit(struct fb_info *info, const struct fb_image *image)
129 {
130 struct nouveau_fbdev *fbcon = info->par;
131 struct nouveau_drm *drm = nouveau_drm(fbcon->dev);
132 struct nouveau_device *device = nv_device(drm->device);
133 int ret;
134
135 if (info->state != FBINFO_STATE_RUNNING)
136 return;
137
138 ret = -ENODEV;
139 if (!in_interrupt() && !(info->flags & FBINFO_HWACCEL_DISABLED) &&
140 mutex_trylock(&drm->client.mutex)) {
141 if (device->card_type < NV_50)
142 ret = nv04_fbcon_imageblit(info, image);
143 else
144 if (device->card_type < NV_C0)
145 ret = nv50_fbcon_imageblit(info, image);
146 else
147 ret = nvc0_fbcon_imageblit(info, image);
148 mutex_unlock(&drm->client.mutex);
149 }
150
151 if (ret == 0)
152 return;
153
154 if (ret != -ENODEV)
155 nouveau_fbcon_gpu_lockup(info);
156 cfb_imageblit(info, image);
157 }
158
159 static int
nouveau_fbcon_sync(struct fb_info * info)160 nouveau_fbcon_sync(struct fb_info *info)
161 {
162 struct nouveau_fbdev *fbcon = info->par;
163 struct nouveau_drm *drm = nouveau_drm(fbcon->dev);
164 struct nouveau_channel *chan = drm->channel;
165 int ret;
166
167 if (!chan || !chan->accel_done || in_interrupt() ||
168 info->state != FBINFO_STATE_RUNNING ||
169 info->flags & FBINFO_HWACCEL_DISABLED)
170 return 0;
171
172 if (!mutex_trylock(&drm->client.mutex))
173 return 0;
174
175 ret = nouveau_channel_idle(chan);
176 mutex_unlock(&drm->client.mutex);
177 if (ret) {
178 nouveau_fbcon_gpu_lockup(info);
179 return 0;
180 }
181
182 chan->accel_done = false;
183 return 0;
184 }
185
186 static struct fb_ops nouveau_fbcon_ops = {
187 .owner = THIS_MODULE,
188 .fb_check_var = drm_fb_helper_check_var,
189 .fb_set_par = drm_fb_helper_set_par,
190 .fb_fillrect = nouveau_fbcon_fillrect,
191 .fb_copyarea = nouveau_fbcon_copyarea,
192 .fb_imageblit = nouveau_fbcon_imageblit,
193 .fb_sync = nouveau_fbcon_sync,
194 .fb_pan_display = drm_fb_helper_pan_display,
195 .fb_blank = drm_fb_helper_blank,
196 .fb_setcmap = drm_fb_helper_setcmap,
197 .fb_debug_enter = drm_fb_helper_debug_enter,
198 .fb_debug_leave = drm_fb_helper_debug_leave,
199 };
200
201 static struct fb_ops nouveau_fbcon_sw_ops = {
202 .owner = THIS_MODULE,
203 .fb_check_var = drm_fb_helper_check_var,
204 .fb_set_par = drm_fb_helper_set_par,
205 .fb_fillrect = cfb_fillrect,
206 .fb_copyarea = cfb_copyarea,
207 .fb_imageblit = cfb_imageblit,
208 .fb_pan_display = drm_fb_helper_pan_display,
209 .fb_blank = drm_fb_helper_blank,
210 .fb_setcmap = drm_fb_helper_setcmap,
211 .fb_debug_enter = drm_fb_helper_debug_enter,
212 .fb_debug_leave = drm_fb_helper_debug_leave,
213 };
214
nouveau_fbcon_gamma_set(struct drm_crtc * crtc,u16 red,u16 green,u16 blue,int regno)215 static void nouveau_fbcon_gamma_set(struct drm_crtc *crtc, u16 red, u16 green,
216 u16 blue, int regno)
217 {
218 struct nouveau_crtc *nv_crtc = nouveau_crtc(crtc);
219
220 nv_crtc->lut.r[regno] = red;
221 nv_crtc->lut.g[regno] = green;
222 nv_crtc->lut.b[regno] = blue;
223 }
224
nouveau_fbcon_gamma_get(struct drm_crtc * crtc,u16 * red,u16 * green,u16 * blue,int regno)225 static void nouveau_fbcon_gamma_get(struct drm_crtc *crtc, u16 *red, u16 *green,
226 u16 *blue, int regno)
227 {
228 struct nouveau_crtc *nv_crtc = nouveau_crtc(crtc);
229
230 *red = nv_crtc->lut.r[regno];
231 *green = nv_crtc->lut.g[regno];
232 *blue = nv_crtc->lut.b[regno];
233 }
234
235 static void
nouveau_fbcon_zfill(struct drm_device * dev,struct nouveau_fbdev * fbcon)236 nouveau_fbcon_zfill(struct drm_device *dev, struct nouveau_fbdev *fbcon)
237 {
238 struct fb_info *info = fbcon->helper.fbdev;
239 struct fb_fillrect rect;
240
241 /* Clear the entire fbcon. The drm will program every connector
242 * with it's preferred mode. If the sizes differ, one display will
243 * quite likely have garbage around the console.
244 */
245 rect.dx = rect.dy = 0;
246 rect.width = info->var.xres_virtual;
247 rect.height = info->var.yres_virtual;
248 rect.color = 0;
249 rect.rop = ROP_COPY;
250 info->fbops->fb_fillrect(info, &rect);
251 }
252
253 static int
nouveau_fbcon_create(struct drm_fb_helper * helper,struct drm_fb_helper_surface_size * sizes)254 nouveau_fbcon_create(struct drm_fb_helper *helper,
255 struct drm_fb_helper_surface_size *sizes)
256 {
257 struct nouveau_fbdev *fbcon = (struct nouveau_fbdev *)helper;
258 struct drm_device *dev = fbcon->dev;
259 struct nouveau_drm *drm = nouveau_drm(dev);
260 struct nouveau_device *device = nv_device(drm->device);
261 struct fb_info *info;
262 struct drm_framebuffer *fb;
263 struct nouveau_framebuffer *nouveau_fb;
264 struct nouveau_channel *chan;
265 struct nouveau_bo *nvbo;
266 struct drm_mode_fb_cmd2 mode_cmd;
267 struct pci_dev *pdev = dev->pdev;
268 int size, ret;
269
270 mode_cmd.width = sizes->surface_width;
271 mode_cmd.height = sizes->surface_height;
272
273 mode_cmd.pitches[0] = mode_cmd.width * (sizes->surface_bpp >> 3);
274 mode_cmd.pitches[0] = roundup(mode_cmd.pitches[0], 256);
275
276 mode_cmd.pixel_format = drm_mode_legacy_fb_format(sizes->surface_bpp,
277 sizes->surface_depth);
278
279 size = mode_cmd.pitches[0] * mode_cmd.height;
280 size = roundup(size, PAGE_SIZE);
281
282 ret = nouveau_gem_new(dev, size, 0, NOUVEAU_GEM_DOMAIN_VRAM,
283 0, 0x0000, &nvbo);
284 if (ret) {
285 NV_ERROR(drm, "failed to allocate framebuffer\n");
286 goto out;
287 }
288
289 ret = nouveau_bo_pin(nvbo, TTM_PL_FLAG_VRAM);
290 if (ret) {
291 NV_ERROR(drm, "failed to pin fb: %d\n", ret);
292 nouveau_bo_ref(NULL, &nvbo);
293 goto out;
294 }
295
296 ret = nouveau_bo_map(nvbo);
297 if (ret) {
298 NV_ERROR(drm, "failed to map fb: %d\n", ret);
299 nouveau_bo_unpin(nvbo);
300 nouveau_bo_ref(NULL, &nvbo);
301 goto out;
302 }
303
304 chan = nouveau_nofbaccel ? NULL : drm->channel;
305 if (chan && device->card_type >= NV_50) {
306 ret = nouveau_bo_vma_add(nvbo, nv_client(chan->cli)->vm,
307 &fbcon->nouveau_fb.vma);
308 if (ret) {
309 NV_ERROR(drm, "failed to map fb into chan: %d\n", ret);
310 chan = NULL;
311 }
312 }
313
314 mutex_lock(&dev->struct_mutex);
315
316 info = framebuffer_alloc(0, &pdev->dev);
317 if (!info) {
318 ret = -ENOMEM;
319 goto out_unref;
320 }
321
322 ret = fb_alloc_cmap(&info->cmap, 256, 0);
323 if (ret) {
324 ret = -ENOMEM;
325 goto out_unref;
326 }
327
328 info->par = fbcon;
329
330 nouveau_framebuffer_init(dev, &fbcon->nouveau_fb, &mode_cmd, nvbo);
331
332 nouveau_fb = &fbcon->nouveau_fb;
333 fb = &nouveau_fb->base;
334
335 /* setup helper */
336 fbcon->helper.fb = fb;
337 fbcon->helper.fbdev = info;
338
339 strcpy(info->fix.id, "nouveaufb");
340 if (nouveau_nofbaccel)
341 info->flags = FBINFO_DEFAULT | FBINFO_HWACCEL_DISABLED;
342 else
343 info->flags = FBINFO_DEFAULT | FBINFO_HWACCEL_COPYAREA |
344 FBINFO_HWACCEL_FILLRECT |
345 FBINFO_HWACCEL_IMAGEBLIT;
346 info->flags |= FBINFO_CAN_FORCE_OUTPUT;
347 info->fbops = &nouveau_fbcon_sw_ops;
348 info->fix.smem_start = nvbo->bo.mem.bus.base +
349 nvbo->bo.mem.bus.offset;
350 info->fix.smem_len = size;
351
352 info->screen_base = nvbo_kmap_obj_iovirtual(nouveau_fb->nvbo);
353 info->screen_size = size;
354
355 drm_fb_helper_fill_fix(info, fb->pitches[0], fb->depth);
356 drm_fb_helper_fill_var(info, &fbcon->helper, sizes->fb_width, sizes->fb_height);
357
358 /* Use default scratch pixmap (info->pixmap.flags = FB_PIXMAP_SYSTEM) */
359
360 mutex_unlock(&dev->struct_mutex);
361
362 if (chan) {
363 ret = -ENODEV;
364 if (device->card_type < NV_50)
365 ret = nv04_fbcon_accel_init(info);
366 else
367 if (device->card_type < NV_C0)
368 ret = nv50_fbcon_accel_init(info);
369 else
370 ret = nvc0_fbcon_accel_init(info);
371
372 if (ret == 0)
373 info->fbops = &nouveau_fbcon_ops;
374 }
375
376 nouveau_fbcon_zfill(dev, fbcon);
377
378 /* To allow resizeing without swapping buffers */
379 NV_INFO(drm, "allocated %dx%d fb: 0x%lx, bo %p\n",
380 nouveau_fb->base.width, nouveau_fb->base.height,
381 nvbo->bo.offset, nvbo);
382
383 vga_switcheroo_client_fb_set(dev->pdev, info);
384 return 0;
385
386 out_unref:
387 mutex_unlock(&dev->struct_mutex);
388 out:
389 return ret;
390 }
391
392 void
nouveau_fbcon_output_poll_changed(struct drm_device * dev)393 nouveau_fbcon_output_poll_changed(struct drm_device *dev)
394 {
395 struct nouveau_drm *drm = nouveau_drm(dev);
396 drm_fb_helper_hotplug_event(&drm->fbcon->helper);
397 }
398
399 static int
nouveau_fbcon_destroy(struct drm_device * dev,struct nouveau_fbdev * fbcon)400 nouveau_fbcon_destroy(struct drm_device *dev, struct nouveau_fbdev *fbcon)
401 {
402 struct nouveau_framebuffer *nouveau_fb = &fbcon->nouveau_fb;
403 struct fb_info *info;
404
405 if (fbcon->helper.fbdev) {
406 info = fbcon->helper.fbdev;
407 unregister_framebuffer(info);
408 if (info->cmap.len)
409 fb_dealloc_cmap(&info->cmap);
410 framebuffer_release(info);
411 }
412
413 if (nouveau_fb->nvbo) {
414 nouveau_bo_unmap(nouveau_fb->nvbo);
415 nouveau_bo_vma_del(nouveau_fb->nvbo, &nouveau_fb->vma);
416 drm_gem_object_unreference_unlocked(nouveau_fb->nvbo->gem);
417 nouveau_fb->nvbo = NULL;
418 }
419 drm_fb_helper_fini(&fbcon->helper);
420 drm_framebuffer_unregister_private(&nouveau_fb->base);
421 drm_framebuffer_cleanup(&nouveau_fb->base);
422 return 0;
423 }
424
nouveau_fbcon_gpu_lockup(struct fb_info * info)425 void nouveau_fbcon_gpu_lockup(struct fb_info *info)
426 {
427 struct nouveau_fbdev *fbcon = info->par;
428 struct nouveau_drm *drm = nouveau_drm(fbcon->dev);
429
430 NV_ERROR(drm, "GPU lockup - switching to software fbcon\n");
431 info->flags |= FBINFO_HWACCEL_DISABLED;
432 }
433
434 static struct drm_fb_helper_funcs nouveau_fbcon_helper_funcs = {
435 .gamma_set = nouveau_fbcon_gamma_set,
436 .gamma_get = nouveau_fbcon_gamma_get,
437 .fb_probe = nouveau_fbcon_create,
438 };
439
440
441 int
nouveau_fbcon_init(struct drm_device * dev)442 nouveau_fbcon_init(struct drm_device *dev)
443 {
444 struct nouveau_drm *drm = nouveau_drm(dev);
445 struct nouveau_fb *pfb = nouveau_fb(drm->device);
446 struct nouveau_fbdev *fbcon;
447 int preferred_bpp;
448 int ret;
449
450 if (!dev->mode_config.num_crtc)
451 return 0;
452
453 fbcon = kzalloc(sizeof(struct nouveau_fbdev), GFP_KERNEL);
454 if (!fbcon)
455 return -ENOMEM;
456
457 fbcon->dev = dev;
458 drm->fbcon = fbcon;
459 fbcon->helper.funcs = &nouveau_fbcon_helper_funcs;
460
461 ret = drm_fb_helper_init(dev, &fbcon->helper,
462 dev->mode_config.num_crtc, 4);
463 if (ret) {
464 kfree(fbcon);
465 return ret;
466 }
467
468 drm_fb_helper_single_add_all_connectors(&fbcon->helper);
469
470 if (pfb->ram.size <= 32 * 1024 * 1024)
471 preferred_bpp = 8;
472 else
473 if (pfb->ram.size <= 64 * 1024 * 1024)
474 preferred_bpp = 16;
475 else
476 preferred_bpp = 32;
477
478 /* disable all the possible outputs/crtcs before entering KMS mode */
479 drm_helper_disable_unused_functions(dev);
480
481 drm_fb_helper_initial_config(&fbcon->helper, preferred_bpp);
482 return 0;
483 }
484
485 void
nouveau_fbcon_fini(struct drm_device * dev)486 nouveau_fbcon_fini(struct drm_device *dev)
487 {
488 struct nouveau_drm *drm = nouveau_drm(dev);
489
490 if (!drm->fbcon)
491 return;
492
493 nouveau_fbcon_destroy(dev, drm->fbcon);
494 kfree(drm->fbcon);
495 drm->fbcon = NULL;
496 }
497
nouveau_fbcon_save_disable_accel(struct drm_device * dev)498 void nouveau_fbcon_save_disable_accel(struct drm_device *dev)
499 {
500 struct nouveau_drm *drm = nouveau_drm(dev);
501
502 drm->fbcon->saved_flags = drm->fbcon->helper.fbdev->flags;
503 drm->fbcon->helper.fbdev->flags |= FBINFO_HWACCEL_DISABLED;
504 }
505
nouveau_fbcon_restore_accel(struct drm_device * dev)506 void nouveau_fbcon_restore_accel(struct drm_device *dev)
507 {
508 struct nouveau_drm *drm = nouveau_drm(dev);
509 drm->fbcon->helper.fbdev->flags = drm->fbcon->saved_flags;
510 }
511
nouveau_fbcon_set_suspend(struct drm_device * dev,int state)512 void nouveau_fbcon_set_suspend(struct drm_device *dev, int state)
513 {
514 struct nouveau_drm *drm = nouveau_drm(dev);
515 console_lock();
516 if (state == 0)
517 nouveau_fbcon_save_disable_accel(dev);
518 fb_set_suspend(drm->fbcon->helper.fbdev, state);
519 if (state == 1)
520 nouveau_fbcon_restore_accel(dev);
521 console_unlock();
522 }
523
nouveau_fbcon_zfill_all(struct drm_device * dev)524 void nouveau_fbcon_zfill_all(struct drm_device *dev)
525 {
526 struct nouveau_drm *drm = nouveau_drm(dev);
527 nouveau_fbcon_zfill(dev, drm->fbcon);
528 }
529