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