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 #include "nouveau_drv.h"
  46 #include <drm/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;
 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 = nouveau_channel_idle(chan);
 166         mutex_unlock(&chan->mutex);
 167         if (ret) {
 168                 nouveau_fbcon_gpu_lockup(info);
 169                 return 0;
 170         }
 171
 172         chan->accel_done = false;
 173         return 0;
 174 }
 175
 176 static struct fb_ops nouveau_fbcon_ops = {
 177         .owner = THIS_MODULE,
 178         .fb_check_var = drm_fb_helper_check_var,
 179         .fb_set_par = drm_fb_helper_set_par,
 180         .fb_fillrect = nouveau_fbcon_fillrect,
 181         .fb_copyarea = nouveau_fbcon_copyarea,
 182         .fb_imageblit = nouveau_fbcon_imageblit,
 183         .fb_sync = nouveau_fbcon_sync,
 184         .fb_pan_display = drm_fb_helper_pan_display,
 185         .fb_blank = drm_fb_helper_blank,
 186         .fb_setcmap = drm_fb_helper_setcmap,
 187         .fb_debug_enter = drm_fb_helper_debug_enter,
 188         .fb_debug_leave = drm_fb_helper_debug_leave,
 189 };
 190
 191 static struct fb_ops nouveau_fbcon_sw_ops = {
 192         .owner = THIS_MODULE,
 193         .fb_check_var = drm_fb_helper_check_var,
 194         .fb_set_par = drm_fb_helper_set_par,
 195         .fb_fillrect = cfb_fillrect,
 196         .fb_copyarea = cfb_copyarea,
 197         .fb_imageblit = cfb_imageblit,
 198         .fb_pan_display = drm_fb_helper_pan_display,
 199         .fb_blank = drm_fb_helper_blank,
 200         .fb_setcmap = drm_fb_helper_setcmap,
 201         .fb_debug_enter = drm_fb_helper_debug_enter,
 202         .fb_debug_leave = drm_fb_helper_debug_leave,
 203 };
 204
 205 static void nouveau_fbcon_gamma_set(struct drm_crtc *crtc, u16 red, u16 green,
 206                                     u16 blue, int regno)
 207 {
 208         struct nouveau_crtc *nv_crtc = nouveau_crtc(crtc);
 209
 210         nv_crtc->lut.r[regno] = red;
 211         nv_crtc->lut.g[regno] = green;
 212         nv_crtc->lut.b[regno] = blue;
 213 }
 214
 215 static void nouveau_fbcon_gamma_get(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         *red = nv_crtc->lut.r[regno];
 221         *green = nv_crtc->lut.g[regno];
 222         *blue = nv_crtc->lut.b[regno];
 223 }
 224
 225 static void
 226 nouveau_fbcon_zfill(struct drm_device *dev, struct nouveau_fbdev *nfbdev)
 227 {
 228         struct fb_info *info = nfbdev->helper.fbdev;
 229         struct fb_fillrect rect;
 230
 231         /* Clear the entire fbcon.  The drm will program every connector
 232          * with it's preferred mode.  If the sizes differ, one display will
 233          * quite likely have garbage around the console.
 234          */
 235         rect.dx = rect.dy = 0;
 236         rect.width = info->var.xres_virtual;
 237         rect.height = info->var.yres_virtual;
 238         rect.color = 0;
 239         rect.rop = ROP_COPY;
 240         info->fbops->fb_fillrect(info, &rect);
 241 }
 242
 243 static int
 244 nouveau_fbcon_create(struct nouveau_fbdev *nfbdev,
 245                      struct drm_fb_helper_surface_size *sizes)
 246 {
 247         struct drm_device *dev = nfbdev->dev;
 248         struct drm_nouveau_private *dev_priv = dev->dev_private;
 249         struct fb_info *info;
 250         struct drm_framebuffer *fb;
 251         struct nouveau_framebuffer *nouveau_fb;
 252         struct nouveau_channel *chan;
 253         struct nouveau_bo *nvbo;
 254         struct drm_mode_fb_cmd2 mode_cmd;
 255         struct pci_dev *pdev = dev->pdev;
 256         struct device *device = &pdev->dev;
 257         int size, ret;
 258
 259         mode_cmd.width = sizes->surface_width;
 260         mode_cmd.height = sizes->surface_height;
 261
 262         mode_cmd.pitches[0] = mode_cmd.width * (sizes->surface_bpp >> 3);
 263         mode_cmd.pitches[0] = roundup(mode_cmd.pitches[0], 256);
 264
 265         mode_cmd.pixel_format = drm_mode_legacy_fb_format(sizes->surface_bpp,
 266                                                           sizes->surface_depth);
 267
 268         size = mode_cmd.pitches[0] * mode_cmd.height;
 269         size = roundup(size, PAGE_SIZE);
 270
 271         ret = nouveau_gem_new(dev, size, 0, NOUVEAU_GEM_DOMAIN_VRAM,
 272                               0, 0x0000, &nvbo);
 273         if (ret) {
 274                 NV_ERROR(dev, "failed to allocate framebuffer\n");
 275                 goto out;
 276         }
 277
 278         ret = nouveau_bo_pin(nvbo, TTM_PL_FLAG_VRAM);
 279         if (ret) {
 280                 NV_ERROR(dev, "failed to pin fb: %d\n", ret);
 281                 nouveau_bo_ref(NULL, &nvbo);
 282                 goto out;
 283         }
 284
 285         ret = nouveau_bo_map(nvbo);
 286         if (ret) {
 287                 NV_ERROR(dev, "failed to map fb: %d\n", ret);
 288                 nouveau_bo_unpin(nvbo);
 289                 nouveau_bo_ref(NULL, &nvbo);
 290                 goto out;
 291         }
 292
 293         chan = nouveau_nofbaccel ? NULL : dev_priv->channel;
 294         if (chan && dev_priv->card_type >= NV_50) {
 295                 ret = nouveau_bo_vma_add(nvbo, chan->vm, &nfbdev->nouveau_fb.vma);
 296                 if (ret) {
 297                         NV_ERROR(dev, "failed to map fb into chan: %d\n", ret);
 298                         chan = NULL;
 299                 }
 300         }
 301
 302         mutex_lock(&dev->struct_mutex);
 303
 304         info = framebuffer_alloc(0, device);
 305         if (!info) {
 306                 ret = -ENOMEM;
 307                 goto out_unref;
 308         }
 309
 310         ret = fb_alloc_cmap(&info->cmap, 256, 0);
 311         if (ret) {
 312                 ret = -ENOMEM;
 313                 goto out_unref;
 314         }
 315
 316         info->par = nfbdev;
 317
 318         nouveau_framebuffer_init(dev, &nfbdev->nouveau_fb, &mode_cmd, nvbo);
 319
 320         nouveau_fb = &nfbdev->nouveau_fb;
 321         fb = &nouveau_fb->base;
 322
 323         /* setup helper */
 324         nfbdev->helper.fb = fb;
 325         nfbdev->helper.fbdev = info;
 326
 327         strcpy(info->fix.id, "nouveaufb");
 328         if (nouveau_nofbaccel)
 329                 info->flags = FBINFO_DEFAULT | FBINFO_HWACCEL_DISABLED;
 330         else
 331                 info->flags = FBINFO_DEFAULT | FBINFO_HWACCEL_COPYAREA |
 332                               FBINFO_HWACCEL_FILLRECT |
 333                               FBINFO_HWACCEL_IMAGEBLIT;
 334         info->flags |= FBINFO_CAN_FORCE_OUTPUT;
 335         info->fbops = &nouveau_fbcon_sw_ops;
 336         info->fix.smem_start = nvbo->bo.mem.bus.base +
 337                                nvbo->bo.mem.bus.offset;
 338         info->fix.smem_len = size;
 339
 340         info->screen_base = nvbo_kmap_obj_iovirtual(nouveau_fb->nvbo);
 341         info->screen_size = size;
 342
 343         drm_fb_helper_fill_fix(info, fb->pitches[0], fb->depth);
 344         drm_fb_helper_fill_var(info, &nfbdev->helper, sizes->fb_width, sizes->fb_height);
 345
 346         /* Set aperture base/size for vesafb takeover */
 347         info->apertures = dev_priv->apertures;
 348         if (!info->apertures) {
 349                 ret = -ENOMEM;
 350                 goto out_unref;
 351         }
 352
 353         /* Use default scratch pixmap (info->pixmap.flags = FB_PIXMAP_SYSTEM) */
 354
 355         mutex_unlock(&dev->struct_mutex);
 356
 357         if (dev_priv->channel && !nouveau_nofbaccel) {
 358                 ret = -ENODEV;
 359                 if (dev_priv->card_type < NV_50)
 360                         ret = nv04_fbcon_accel_init(info);
 361                 else
 362                 if (dev_priv->card_type < NV_C0)
 363                         ret = nv50_fbcon_accel_init(info);
 364                 else
 365                         ret = nvc0_fbcon_accel_init(info);
 366
 367                 if (ret == 0)
 368                         info->fbops = &nouveau_fbcon_ops;
 369         }
 370
 371         nouveau_fbcon_zfill(dev, nfbdev);
 372
 373         /* To allow resizeing without swapping buffers */
 374         NV_INFO(dev, "allocated %dx%d fb: 0x%lx, bo %p\n",
 375                                                 nouveau_fb->base.width,
 376                                                 nouveau_fb->base.height,
 377                                                 nvbo->bo.offset, nvbo);
 378
 379         vga_switcheroo_client_fb_set(dev->pdev, info);
 380         return 0;
 381
 382 out_unref:
 383         mutex_unlock(&dev->struct_mutex);
 384 out:
 385         return ret;
 386 }
 387
 388 static int
 389 nouveau_fbcon_find_or_create_single(struct drm_fb_helper *helper,
 390                                     struct drm_fb_helper_surface_size *sizes)
 391 {
 392         struct nouveau_fbdev *nfbdev = (struct nouveau_fbdev *)helper;
 393         int new_fb = 0;
 394         int ret;
 395
 396         if (!helper->fb) {
 397                 ret = nouveau_fbcon_create(nfbdev, sizes);
 398                 if (ret)
 399                         return ret;
 400                 new_fb = 1;
 401         }
 402         return new_fb;
 403 }
 404
 405 void
 406 nouveau_fbcon_output_poll_changed(struct drm_device *dev)
 407 {
 408         struct drm_nouveau_private *dev_priv = dev->dev_private;
 409         drm_fb_helper_hotplug_event(&dev_priv->nfbdev->helper);
 410 }
 411
 412 static int
 413 nouveau_fbcon_destroy(struct drm_device *dev, struct nouveau_fbdev *nfbdev)
 414 {
 415         struct nouveau_framebuffer *nouveau_fb = &nfbdev->nouveau_fb;
 416         struct fb_info *info;
 417
 418         if (nfbdev->helper.fbdev) {
 419                 info = nfbdev->helper.fbdev;
 420                 unregister_framebuffer(info);
 421                 if (info->cmap.len)
 422                         fb_dealloc_cmap(&info->cmap);
 423                 framebuffer_release(info);
 424         }
 425
 426         if (nouveau_fb->nvbo) {
 427                 nouveau_bo_unmap(nouveau_fb->nvbo);
 428                 nouveau_bo_vma_del(nouveau_fb->nvbo, &nouveau_fb->vma);
 429                 drm_gem_object_unreference_unlocked(nouveau_fb->nvbo->gem);
 430                 nouveau_fb->nvbo = NULL;
 431         }
 432         drm_fb_helper_fini(&nfbdev->helper);
 433         drm_framebuffer_cleanup(&nouveau_fb->base);
 434         return 0;
 435 }
 436
 437 void nouveau_fbcon_gpu_lockup(struct fb_info *info)
 438 {
 439         struct nouveau_fbdev *nfbdev = info->par;
 440         struct drm_device *dev = nfbdev->dev;
 441
 442         NV_ERROR(dev, "GPU lockup - switching to software fbcon\n");
 443         info->flags |= FBINFO_HWACCEL_DISABLED;
 444 }
 445
 446 static struct drm_fb_helper_funcs nouveau_fbcon_helper_funcs = {
 447         .gamma_set = nouveau_fbcon_gamma_set,
 448         .gamma_get = nouveau_fbcon_gamma_get,
 449         .fb_probe = nouveau_fbcon_find_or_create_single,
 450 };
 451
 452
 453 int nouveau_fbcon_init(struct drm_device *dev)
 454 {
 455         struct drm_nouveau_private *dev_priv = dev->dev_private;
 456         struct nouveau_fbdev *nfbdev;
 457         int preferred_bpp;
 458         int ret;
 459
 460         nfbdev = kzalloc(sizeof(struct nouveau_fbdev), GFP_KERNEL);
 461         if (!nfbdev)
 462                 return -ENOMEM;
 463
 464         nfbdev->dev = dev;
 465         dev_priv->nfbdev = nfbdev;
 466         nfbdev->helper.funcs = &nouveau_fbcon_helper_funcs;
 467
 468         ret = drm_fb_helper_init(dev, &nfbdev->helper,
 469                                  dev->mode_config.num_crtc, 4);
 470         if (ret) {
 471                 kfree(nfbdev);
 472                 return ret;
 473         }
 474
 475         drm_fb_helper_single_add_all_connectors(&nfbdev->helper);
 476
 477         if (dev_priv->vram_size <= 32 * 1024 * 1024)
 478                 preferred_bpp = 8;
 479         else if (dev_priv->vram_size <= 64 * 1024 * 1024)
 480                 preferred_bpp = 16;
 481         else
 482                 preferred_bpp = 32;
 483
 484         drm_fb_helper_initial_config(&nfbdev->helper, preferred_bpp);
 485         return 0;
 486 }
 487
 488 void nouveau_fbcon_fini(struct drm_device *dev)
 489 {
 490         struct drm_nouveau_private *dev_priv = dev->dev_private;
 491
 492         if (!dev_priv->nfbdev)
 493                 return;
 494
 495         nouveau_fbcon_destroy(dev, dev_priv->nfbdev);
 496         kfree(dev_priv->nfbdev);
 497         dev_priv->nfbdev = NULL;
 498 }
 499
 500 void nouveau_fbcon_save_disable_accel(struct drm_device *dev)
 501 {
 502         struct drm_nouveau_private *dev_priv = dev->dev_private;
 503
 504         dev_priv->nfbdev->saved_flags = dev_priv->nfbdev->helper.fbdev->flags;
 505         dev_priv->nfbdev->helper.fbdev->flags |= FBINFO_HWACCEL_DISABLED;
 506 }
 507
 508 void nouveau_fbcon_restore_accel(struct drm_device *dev)
 509 {
 510         struct drm_nouveau_private *dev_priv = dev->dev_private;
 511         dev_priv->nfbdev->helper.fbdev->flags = dev_priv->nfbdev->saved_flags;
 512 }
 513
 514 void nouveau_fbcon_set_suspend(struct drm_device *dev, int state)
 515 {
 516         struct drm_nouveau_private *dev_priv = dev->dev_private;
 517         console_lock();
 518         if (state == 0)
 519                 nouveau_fbcon_save_disable_accel(dev);
 520         fb_set_suspend(dev_priv->nfbdev->helper.fbdev, state);
 521         if (state == 1)
 522                 nouveau_fbcon_restore_accel(dev);
 523         console_unlock();
 524 }
 525
 526 void nouveau_fbcon_zfill_all(struct drm_device *dev)
 527 {
 528         struct drm_nouveau_private *dev_priv = dev->dev_private;
 529         nouveau_fbcon_zfill(dev, dev_priv->nfbdev);
 530 }