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 "drmP.h"
  42 #include "drm.h"
  43 #include "drm_crtc.h"
  44 #include "drm_crtc_helper.h"
  45 #include "drm_fb_helper.h"
  46 #include "nouveau_drv.h"
  47 #include "nouveau_drm.h"
  48 #include "nouveau_crtc.h"
  49 #include "nouveau_fb.h"
  50 #include "nouveau_fbcon.h"
  51 #include "nouveau_dma.h"
  52
  53 static void
  54 nouveau_fbcon_fillrect(struct fb_info *info, const struct fb_fillrect *rect)
  55 {
  56         struct nouveau_fbdev *nfbdev = info->par;
  57         struct drm_device *dev = nfbdev->dev;
  58         struct drm_nouveau_private *dev_priv = dev->dev_private;
  59         int ret;
  60
  61         if (info->state != FBINFO_STATE_RUNNING)
  62                 return;
  63
  64         ret = -ENODEV;
  65         if (!in_interrupt() && !(info->flags & FBINFO_HWACCEL_DISABLED) &&
  66             mutex_trylock(&dev_priv->channel->mutex)) {
  67                 if (dev_priv->card_type < NV_50)
  68                         ret = nv04_fbcon_fillrect(info, rect);
  69                 else
  70                 if (dev_priv->card_type < NV_C0)
  71                         ret = nv50_fbcon_fillrect(info, rect);
  72                 else
  73                         ret = nvc0_fbcon_fillrect(info, rect);
  74                 mutex_unlock(&dev_priv->channel->mutex);
  75         }
  76
  77         if (ret == 0)
  78                 return;
  79
  80         if (ret != -ENODEV)
  81                 nouveau_fbcon_gpu_lockup(info);
  82         cfb_fillrect(info, rect);
  83 }
  84
  85 static void
  86 nouveau_fbcon_copyarea(struct fb_info *info, const struct fb_copyarea *image)
  87 {
  88         struct nouveau_fbdev *nfbdev = info->par;
  89         struct drm_device *dev = nfbdev->dev;
  90         struct drm_nouveau_private *dev_priv = dev->dev_private;
  91         int ret;
  92
  93         if (info->state != FBINFO_STATE_RUNNING)
  94                 return;
  95
  96         ret = -ENODEV;
  97         if (!in_interrupt() && !(info->flags & FBINFO_HWACCEL_DISABLED) &&
  98             mutex_trylock(&dev_priv->channel->mutex)) {
  99                 if (dev_priv->card_type < NV_50)
 100                         ret = nv04_fbcon_copyarea(info, image);
 101                 else
 102                 if (dev_priv->card_type < NV_C0)
 103                         ret = nv50_fbcon_copyarea(info, image);
 104                 else
 105                         ret = nvc0_fbcon_copyarea(info, image);
 106                 mutex_unlock(&dev_priv->channel->mutex);
 107         }
 108
 109         if (ret == 0)
 110                 return;
 111
 112         if (ret != -ENODEV)
 113                 nouveau_fbcon_gpu_lockup(info);
 114         cfb_copyarea(info, image);
 115 }
 116
 117 static void
 118 nouveau_fbcon_imageblit(struct fb_info *info, const struct fb_image *image)
 119 {
 120         struct nouveau_fbdev *nfbdev = info->par;
 121         struct drm_device *dev = nfbdev->dev;
 122         struct drm_nouveau_private *dev_priv = dev->dev_private;
 123         int ret;
 124
 125         if (info->state != FBINFO_STATE_RUNNING)
 126                 return;
 127
 128         ret = -ENODEV;
 129         if (!in_interrupt() && !(info->flags & FBINFO_HWACCEL_DISABLED) &&
 130             mutex_trylock(&dev_priv->channel->mutex)) {
 131                 if (dev_priv->card_type < NV_50)
 132                         ret = nv04_fbcon_imageblit(info, image);
 133                 else
 134                 if (dev_priv->card_type < NV_C0)
 135                         ret = nv50_fbcon_imageblit(info, image);
 136                 else
 137                         ret = nvc0_fbcon_imageblit(info, image);
 138                 mutex_unlock(&dev_priv->channel->mutex);
 139         }
 140
 141         if (ret == 0)
 142                 return;
 143
 144         if (ret != -ENODEV)
 145                 nouveau_fbcon_gpu_lockup(info);
 146         cfb_imageblit(info, image);
 147 }
 148
 149 static int
 150 nouveau_fbcon_sync(struct fb_info *info)
 151 {
 152         struct nouveau_fbdev *nfbdev = info->par;
 153         struct drm_device *dev = nfbdev->dev;
 154         struct drm_nouveau_private *dev_priv = dev->dev_private;
 155         struct nouveau_channel *chan = dev_priv->channel;
 156         int ret, i;
 157
 158         if (!chan || !chan->accel_done || in_interrupt() ||
 159             info->state != FBINFO_STATE_RUNNING ||
 160             info->flags & FBINFO_HWACCEL_DISABLED)
 161                 return 0;
 162
 163         if (!mutex_trylock(&chan->mutex))
 164                 return 0;
 165
 166         ret = RING_SPACE(chan, 4);
 167         if (ret) {
 168                 mutex_unlock(&chan->mutex);
 169                 nouveau_fbcon_gpu_lockup(info);
 170                 return 0;
 171         }
 172
 173         if (dev_priv->card_type >= NV_C0) {
 174                 BEGIN_NVC0(chan, 2, NvSub2D, 0x010c, 1);
 175                 OUT_RING  (chan, 0);
 176                 BEGIN_NVC0(chan, 2, NvSub2D, 0x0100, 1);
 177                 OUT_RING  (chan, 0);
 178         } else {
 179                 BEGIN_RING(chan, 0, 0x0104, 1);
 180                 OUT_RING  (chan, 0);
 181                 BEGIN_RING(chan, 0, 0x0100, 1);
 182                 OUT_RING  (chan, 0);
 183         }
 184
 185         nouveau_bo_wr32(chan->notifier_bo, chan->m2mf_ntfy/4 + 3, 0xffffffff);
 186         FIRE_RING(chan);
 187         mutex_unlock(&chan->mutex);
 188
 189         ret = -EBUSY;
 190         for (i = 0; i < 100000; i++) {
 191                 if (!nouveau_bo_rd32(chan->notifier_bo, chan->m2mf_ntfy/4 + 3)) {
 192                         ret = 0;
 193                         break;
 194                 }
 195                 DRM_UDELAY(1);
 196         }
 197
 198         if (ret) {
 199                 nouveau_fbcon_gpu_lockup(info);
 200                 return 0;
 201         }
 202
 203         chan->accel_done = false;
 204         return 0;
 205 }
 206
 207 static struct fb_ops nouveau_fbcon_ops = {
 208         .owner = THIS_MODULE,
 209         .fb_check_var = drm_fb_helper_check_var,
 210         .fb_set_par = drm_fb_helper_set_par,
 211         .fb_fillrect = nouveau_fbcon_fillrect,
 212         .fb_copyarea = nouveau_fbcon_copyarea,
 213         .fb_imageblit = nouveau_fbcon_imageblit,
 214         .fb_sync = nouveau_fbcon_sync,
 215         .fb_pan_display = drm_fb_helper_pan_display,
 216         .fb_blank = drm_fb_helper_blank,
 217         .fb_setcmap = drm_fb_helper_setcmap,
 218         .fb_debug_enter = drm_fb_helper_debug_enter,
 219         .fb_debug_leave = drm_fb_helper_debug_leave,
 220 };
 221
 222 static struct fb_ops nouveau_fbcon_sw_ops = {
 223         .owner = THIS_MODULE,
 224         .fb_check_var = drm_fb_helper_check_var,
 225         .fb_set_par = drm_fb_helper_set_par,
 226         .fb_fillrect = cfb_fillrect,
 227         .fb_copyarea = cfb_copyarea,
 228         .fb_imageblit = cfb_imageblit,
 229         .fb_pan_display = drm_fb_helper_pan_display,
 230         .fb_blank = drm_fb_helper_blank,
 231         .fb_setcmap = drm_fb_helper_setcmap,
 232         .fb_debug_enter = drm_fb_helper_debug_enter,
 233         .fb_debug_leave = drm_fb_helper_debug_leave,
 234 };
 235
 236 static void nouveau_fbcon_gamma_set(struct drm_crtc *crtc, u16 red, u16 green,
 237                                     u16 blue, int regno)
 238 {
 239         struct nouveau_crtc *nv_crtc = nouveau_crtc(crtc);
 240
 241         nv_crtc->lut.r[regno] = red;
 242         nv_crtc->lut.g[regno] = green;
 243         nv_crtc->lut.b[regno] = blue;
 244 }
 245
 246 static void nouveau_fbcon_gamma_get(struct drm_crtc *crtc, u16 *red, u16 *green,
 247                                     u16 *blue, int regno)
 248 {
 249         struct nouveau_crtc *nv_crtc = nouveau_crtc(crtc);
 250
 251         *red = nv_crtc->lut.r[regno];
 252         *green = nv_crtc->lut.g[regno];
 253         *blue = nv_crtc->lut.b[regno];
 254 }
 255
 256 static void
 257 nouveau_fbcon_zfill(struct drm_device *dev, struct nouveau_fbdev *nfbdev)
 258 {
 259         struct fb_info *info = nfbdev->helper.fbdev;
 260         struct fb_fillrect rect;
 261
 262         /* Clear the entire fbcon.  The drm will program every connector
 263          * with it's preferred mode.  If the sizes differ, one display will
 264          * quite likely have garbage around the console.
 265          */
 266         rect.dx = rect.dy = 0;
 267         rect.width = info->var.xres_virtual;
 268         rect.height = info->var.yres_virtual;
 269         rect.color = 0;
 270         rect.rop = ROP_COPY;
 271         info->fbops->fb_fillrect(info, &rect);
 272 }
 273
 274 static int
 275 nouveau_fbcon_create(struct nouveau_fbdev *nfbdev,
 276                      struct drm_fb_helper_surface_size *sizes)
 277 {
 278         struct drm_device *dev = nfbdev->dev;
 279         struct drm_nouveau_private *dev_priv = dev->dev_private;
 280         struct fb_info *info;
 281         struct drm_framebuffer *fb;
 282         struct nouveau_framebuffer *nouveau_fb;
 283         struct nouveau_channel *chan;
 284         struct nouveau_bo *nvbo;
 285         struct drm_mode_fb_cmd2 mode_cmd;
 286         struct pci_dev *pdev = dev->pdev;
 287         struct device *device = &pdev->dev;
 288         int size, ret;
 289
 290         mode_cmd.width = sizes->surface_width;
 291         mode_cmd.height = sizes->surface_height;
 292
 293         mode_cmd.pitches[0] = mode_cmd.width * (sizes->surface_bpp >> 3);
 294         mode_cmd.pitches[0] = roundup(mode_cmd.pitches[0], 256);
 295
 296         mode_cmd.pixel_format = drm_mode_legacy_fb_format(sizes->surface_bpp,
 297                                                           sizes->surface_depth);
 298
 299         size = mode_cmd.pitches[0] * mode_cmd.height;
 300         size = roundup(size, PAGE_SIZE);
 301
 302         ret = nouveau_gem_new(dev, size, 0, NOUVEAU_GEM_DOMAIN_VRAM,
 303                               0, 0x0000, &nvbo);
 304         if (ret) {
 305                 NV_ERROR(dev, "failed to allocate framebuffer\n");
 306                 goto out;
 307         }
 308
 309         ret = nouveau_bo_pin(nvbo, TTM_PL_FLAG_VRAM);
 310         if (ret) {
 311                 NV_ERROR(dev, "failed to pin fb: %d\n", ret);
 312                 nouveau_bo_ref(NULL, &nvbo);
 313                 goto out;
 314         }
 315
 316         ret = nouveau_bo_map(nvbo);
 317         if (ret) {
 318                 NV_ERROR(dev, "failed to map fb: %d\n", ret);
 319                 nouveau_bo_unpin(nvbo);
 320                 nouveau_bo_ref(NULL, &nvbo);
 321                 goto out;
 322         }
 323
 324         chan = nouveau_nofbaccel ? NULL : dev_priv->channel;
 325         if (chan && dev_priv->card_type >= NV_50) {
 326                 ret = nouveau_bo_vma_add(nvbo, chan->vm, &nfbdev->nouveau_fb.vma);
 327                 if (ret) {
 328                         NV_ERROR(dev, "failed to map fb into chan: %d\n", ret);
 329                         chan = NULL;
 330                 }
 331         }
 332
 333         mutex_lock(&dev->struct_mutex);
 334
 335         info = framebuffer_alloc(0, device);
 336         if (!info) {
 337                 ret = -ENOMEM;
 338                 goto out_unref;
 339         }
 340
 341         ret = fb_alloc_cmap(&info->cmap, 256, 0);
 342         if (ret) {
 343                 ret = -ENOMEM;
 344                 goto out_unref;
 345         }
 346
 347         info->par = nfbdev;
 348
 349         nouveau_framebuffer_init(dev, &nfbdev->nouveau_fb, &mode_cmd, nvbo);
 350
 351         nouveau_fb = &nfbdev->nouveau_fb;
 352         fb = &nouveau_fb->base;
 353
 354         /* setup helper */
 355         nfbdev->helper.fb = fb;
 356         nfbdev->helper.fbdev = info;
 357
 358         strcpy(info->fix.id, "nouveaufb");
 359         if (nouveau_nofbaccel)
 360                 info->flags = FBINFO_DEFAULT | FBINFO_HWACCEL_DISABLED;
 361         else
 362                 info->flags = FBINFO_DEFAULT | FBINFO_HWACCEL_COPYAREA |
 363                               FBINFO_HWACCEL_FILLRECT |
 364                               FBINFO_HWACCEL_IMAGEBLIT;
 365         info->flags |= FBINFO_CAN_FORCE_OUTPUT;
 366         info->fbops = &nouveau_fbcon_sw_ops;
 367         info->fix.smem_start = nvbo->bo.mem.bus.base +
 368                                nvbo->bo.mem.bus.offset;
 369         info->fix.smem_len = size;
 370
 371         info->screen_base = nvbo_kmap_obj_iovirtual(nouveau_fb->nvbo);
 372         info->screen_size = size;
 373
 374         drm_fb_helper_fill_fix(info, fb->pitches[0], fb->depth);
 375         drm_fb_helper_fill_var(info, &nfbdev->helper, sizes->fb_width, sizes->fb_height);
 376
 377         /* Set aperture base/size for vesafb takeover */
 378         info->apertures = dev_priv->apertures;
 379         if (!info->apertures) {
 380                 ret = -ENOMEM;
 381                 goto out_unref;
 382         }
 383
 384         /* Use default scratch pixmap (info->pixmap.flags = FB_PIXMAP_SYSTEM) */
 385
 386         mutex_unlock(&dev->struct_mutex);
 387
 388         if (dev_priv->channel && !nouveau_nofbaccel) {
 389                 ret = -ENODEV;
 390                 if (dev_priv->card_type < NV_50)
 391                         ret = nv04_fbcon_accel_init(info);
 392                 else
 393                 if (dev_priv->card_type < NV_C0)
 394                         ret = nv50_fbcon_accel_init(info);
 395                 else
 396                         ret = nvc0_fbcon_accel_init(info);
 397
 398                 if (ret == 0)
 399                         info->fbops = &nouveau_fbcon_ops;
 400         }
 401
 402         nouveau_fbcon_zfill(dev, nfbdev);
 403
 404         /* To allow resizeing without swapping buffers */
 405         NV_INFO(dev, "allocated %dx%d fb: 0x%lx, bo %p\n",
 406                                                 nouveau_fb->base.width,
 407                                                 nouveau_fb->base.height,
 408                                                 nvbo->bo.offset, nvbo);
 409
 410         vga_switcheroo_client_fb_set(dev->pdev, info);
 411         return 0;
 412
 413 out_unref:
 414         mutex_unlock(&dev->struct_mutex);
 415 out:
 416         return ret;
 417 }
 418
 419 static int
 420 nouveau_fbcon_find_or_create_single(struct drm_fb_helper *helper,
 421                                     struct drm_fb_helper_surface_size *sizes)
 422 {
 423         struct nouveau_fbdev *nfbdev = (struct nouveau_fbdev *)helper;
 424         int new_fb = 0;
 425         int ret;
 426
 427         if (!helper->fb) {
 428                 ret = nouveau_fbcon_create(nfbdev, sizes);
 429                 if (ret)
 430                         return ret;
 431                 new_fb = 1;
 432         }
 433         return new_fb;
 434 }
 435
 436 void
 437 nouveau_fbcon_output_poll_changed(struct drm_device *dev)
 438 {
 439         struct drm_nouveau_private *dev_priv = dev->dev_private;
 440         drm_fb_helper_hotplug_event(&dev_priv->nfbdev->helper);
 441 }
 442
 443 static int
 444 nouveau_fbcon_destroy(struct drm_device *dev, struct nouveau_fbdev *nfbdev)
 445 {
 446         struct nouveau_framebuffer *nouveau_fb = &nfbdev->nouveau_fb;
 447         struct fb_info *info;
 448
 449         if (nfbdev->helper.fbdev) {
 450                 info = nfbdev->helper.fbdev;
 451                 unregister_framebuffer(info);
 452                 if (info->cmap.len)
 453                         fb_dealloc_cmap(&info->cmap);
 454                 framebuffer_release(info);
 455         }
 456
 457         if (nouveau_fb->nvbo) {
 458                 nouveau_bo_unmap(nouveau_fb->nvbo);
 459                 nouveau_bo_vma_del(nouveau_fb->nvbo, &nouveau_fb->vma);
 460                 drm_gem_object_unreference_unlocked(nouveau_fb->nvbo->gem);
 461                 nouveau_fb->nvbo = NULL;
 462         }
 463         drm_fb_helper_fini(&nfbdev->helper);
 464         drm_framebuffer_cleanup(&nouveau_fb->base);
 465         return 0;
 466 }
 467
 468 void nouveau_fbcon_gpu_lockup(struct fb_info *info)
 469 {
 470         struct nouveau_fbdev *nfbdev = info->par;
 471         struct drm_device *dev = nfbdev->dev;
 472
 473         NV_ERROR(dev, "GPU lockup - switching to software fbcon\n");
 474         info->flags |= FBINFO_HWACCEL_DISABLED;
 475 }
 476
 477 static struct drm_fb_helper_funcs nouveau_fbcon_helper_funcs = {
 478         .gamma_set = nouveau_fbcon_gamma_set,
 479         .gamma_get = nouveau_fbcon_gamma_get,
 480         .fb_probe = nouveau_fbcon_find_or_create_single,
 481 };
 482
 483
 484 int nouveau_fbcon_init(struct drm_device *dev)
 485 {
 486         struct drm_nouveau_private *dev_priv = dev->dev_private;
 487         struct nouveau_fbdev *nfbdev;
 488         int preferred_bpp;
 489         int ret;
 490
 491         nfbdev = kzalloc(sizeof(struct nouveau_fbdev), GFP_KERNEL);
 492         if (!nfbdev)
 493                 return -ENOMEM;
 494
 495         nfbdev->dev = dev;
 496         dev_priv->nfbdev = nfbdev;
 497         nfbdev->helper.funcs = &nouveau_fbcon_helper_funcs;
 498
 499         ret = drm_fb_helper_init(dev, &nfbdev->helper,
 500                                  nv_two_heads(dev) ? 2 : 1, 4);
 501         if (ret) {
 502                 kfree(nfbdev);
 503                 return ret;
 504         }
 505
 506         drm_fb_helper_single_add_all_connectors(&nfbdev->helper);
 507
 508         if (dev_priv->vram_size <= 32 * 1024 * 1024)
 509                 preferred_bpp = 8;
 510         else if (dev_priv->vram_size <= 64 * 1024 * 1024)
 511                 preferred_bpp = 16;
 512         else
 513                 preferred_bpp = 32;
 514
 515         drm_fb_helper_initial_config(&nfbdev->helper, preferred_bpp);
 516         return 0;
 517 }
 518
 519 void nouveau_fbcon_fini(struct drm_device *dev)
 520 {
 521         struct drm_nouveau_private *dev_priv = dev->dev_private;
 522
 523         if (!dev_priv->nfbdev)
 524                 return;
 525
 526         nouveau_fbcon_destroy(dev, dev_priv->nfbdev);
 527         kfree(dev_priv->nfbdev);
 528         dev_priv->nfbdev = NULL;
 529 }
 530
 531 void nouveau_fbcon_save_disable_accel(struct drm_device *dev)
 532 {
 533         struct drm_nouveau_private *dev_priv = dev->dev_private;
 534
 535         dev_priv->nfbdev->saved_flags = dev_priv->nfbdev->helper.fbdev->flags;
 536         dev_priv->nfbdev->helper.fbdev->flags |= FBINFO_HWACCEL_DISABLED;
 537 }
 538
 539 void nouveau_fbcon_restore_accel(struct drm_device *dev)
 540 {
 541         struct drm_nouveau_private *dev_priv = dev->dev_private;
 542         dev_priv->nfbdev->helper.fbdev->flags = dev_priv->nfbdev->saved_flags;
 543 }
 544
 545 void nouveau_fbcon_set_suspend(struct drm_device *dev, int state)
 546 {
 547         struct drm_nouveau_private *dev_priv = dev->dev_private;
 548         console_lock();
 549         if (state == 0)
 550                 nouveau_fbcon_save_disable_accel(dev);
 551         fb_set_suspend(dev_priv->nfbdev->helper.fbdev, state);
 552         if (state == 1)
 553                 nouveau_fbcon_restore_accel(dev);
 554         console_unlock();
 555 }
 556
 557 void nouveau_fbcon_zfill_all(struct drm_device *dev)
 558 {
 559         struct drm_nouveau_private *dev_priv = dev->dev_private;
 560         nouveau_fbcon_zfill(dev, dev_priv->nfbdev);
 561 }