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;
 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 = nouveau_channel_idle(chan);
 167         mutex_unlock(&chan->mutex);
 168         if (ret) {
 169                 nouveau_fbcon_gpu_lockup(info);
 170                 return 0;
 171         }
 172
 173         chan->accel_done = false;
 174         return 0;
 175 }
 176
 177 static struct fb_ops nouveau_fbcon_ops = {
 178         .owner = THIS_MODULE,
 179         .fb_check_var = drm_fb_helper_check_var,
 180         .fb_set_par = drm_fb_helper_set_par,
 181         .fb_fillrect = nouveau_fbcon_fillrect,
 182         .fb_copyarea = nouveau_fbcon_copyarea,
 183         .fb_imageblit = nouveau_fbcon_imageblit,
 184         .fb_sync = nouveau_fbcon_sync,
 185         .fb_pan_display = drm_fb_helper_pan_display,
 186         .fb_blank = drm_fb_helper_blank,
 187         .fb_setcmap = drm_fb_helper_setcmap,
 188         .fb_debug_enter = drm_fb_helper_debug_enter,
 189         .fb_debug_leave = drm_fb_helper_debug_leave,
 190 };
 191
 192 static struct fb_ops nouveau_fbcon_sw_ops = {
 193         .owner = THIS_MODULE,
 194         .fb_check_var = drm_fb_helper_check_var,
 195         .fb_set_par = drm_fb_helper_set_par,
 196         .fb_fillrect = cfb_fillrect,
 197         .fb_copyarea = cfb_copyarea,
 198         .fb_imageblit = cfb_imageblit,
 199         .fb_pan_display = drm_fb_helper_pan_display,
 200         .fb_blank = drm_fb_helper_blank,
 201         .fb_setcmap = drm_fb_helper_setcmap,
 202         .fb_debug_enter = drm_fb_helper_debug_enter,
 203         .fb_debug_leave = drm_fb_helper_debug_leave,
 204 };
 205
 206 static void nouveau_fbcon_gamma_set(struct drm_crtc *crtc, u16 red, u16 green,
 207                                     u16 blue, int regno)
 208 {
 209         struct nouveau_crtc *nv_crtc = nouveau_crtc(crtc);
 210
 211         nv_crtc->lut.r[regno] = red;
 212         nv_crtc->lut.g[regno] = green;
 213         nv_crtc->lut.b[regno] = blue;
 214 }
 215
 216 static void nouveau_fbcon_gamma_get(struct drm_crtc *crtc, u16 *red, u16 *green,
 217                                     u16 *blue, int regno)
 218 {
 219         struct nouveau_crtc *nv_crtc = nouveau_crtc(crtc);
 220
 221         *red = nv_crtc->lut.r[regno];
 222         *green = nv_crtc->lut.g[regno];
 223         *blue = nv_crtc->lut.b[regno];
 224 }
 225
 226 static void
 227 nouveau_fbcon_zfill(struct drm_device *dev, struct nouveau_fbdev *nfbdev)
 228 {
 229         struct fb_info *info = nfbdev->helper.fbdev;
 230         struct fb_fillrect rect;
 231
 232         /* Clear the entire fbcon.  The drm will program every connector
 233          * with it's preferred mode.  If the sizes differ, one display will
 234          * quite likely have garbage around the console.
 235          */
 236         rect.dx = rect.dy = 0;
 237         rect.width = info->var.xres_virtual;
 238         rect.height = info->var.yres_virtual;
 239         rect.color = 0;
 240         rect.rop = ROP_COPY;
 241         info->fbops->fb_fillrect(info, &rect);
 242 }
 243
 244 static int
 245 nouveau_fbcon_create(struct nouveau_fbdev *nfbdev,
 246                      struct drm_fb_helper_surface_size *sizes)
 247 {
 248         struct drm_device *dev = nfbdev->dev;
 249         struct drm_nouveau_private *dev_priv = dev->dev_private;
 250         struct fb_info *info;
 251         struct drm_framebuffer *fb;
 252         struct nouveau_framebuffer *nouveau_fb;
 253         struct nouveau_channel *chan;
 254         struct nouveau_bo *nvbo;
 255         struct drm_mode_fb_cmd2 mode_cmd;
 256         struct pci_dev *pdev = dev->pdev;
 257         struct device *device = &pdev->dev;
 258         int size, ret;
 259
 260         mode_cmd.width = sizes->surface_width;
 261         mode_cmd.height = sizes->surface_height;
 262
 263         mode_cmd.pitches[0] = mode_cmd.width * (sizes->surface_bpp >> 3);
 264         mode_cmd.pitches[0] = roundup(mode_cmd.pitches[0], 256);
 265
 266         mode_cmd.pixel_format = drm_mode_legacy_fb_format(sizes->surface_bpp,
 267                                                           sizes->surface_depth);
 268
 269         size = mode_cmd.pitches[0] * mode_cmd.height;
 270         size = roundup(size, PAGE_SIZE);
 271
 272         ret = nouveau_gem_new(dev, size, 0, NOUVEAU_GEM_DOMAIN_VRAM,
 273                               0, 0x0000, &nvbo);
 274         if (ret) {
 275                 NV_ERROR(dev, "failed to allocate framebuffer\n");
 276                 goto out;
 277         }
 278
 279         ret = nouveau_bo_pin(nvbo, TTM_PL_FLAG_VRAM);
 280         if (ret) {
 281                 NV_ERROR(dev, "failed to pin fb: %d\n", ret);
 282                 nouveau_bo_ref(NULL, &nvbo);
 283                 goto out;
 284         }
 285
 286         ret = nouveau_bo_map(nvbo);
 287         if (ret) {
 288                 NV_ERROR(dev, "failed to map fb: %d\n", ret);
 289                 nouveau_bo_unpin(nvbo);
 290                 nouveau_bo_ref(NULL, &nvbo);
 291                 goto out;
 292         }
 293
 294         chan = nouveau_nofbaccel ? NULL : dev_priv->channel;
 295         if (chan && dev_priv->card_type >= NV_50) {
 296                 ret = nouveau_bo_vma_add(nvbo, chan->vm, &nfbdev->nouveau_fb.vma);
 297                 if (ret) {
 298                         NV_ERROR(dev, "failed to map fb into chan: %d\n", ret);
 299                         chan = NULL;
 300                 }
 301         }
 302
 303         mutex_lock(&dev->struct_mutex);
 304
 305         info = framebuffer_alloc(0, device);
 306         if (!info) {
 307                 ret = -ENOMEM;
 308                 goto out_unref;
 309         }
 310
 311         ret = fb_alloc_cmap(&info->cmap, 256, 0);
 312         if (ret) {
 313                 ret = -ENOMEM;
 314                 goto out_unref;
 315         }
 316
 317         info->par = nfbdev;
 318
 319         nouveau_framebuffer_init(dev, &nfbdev->nouveau_fb, &mode_cmd, nvbo);
 320
 321         nouveau_fb = &nfbdev->nouveau_fb;
 322         fb = &nouveau_fb->base;
 323
 324         /* setup helper */
 325         nfbdev->helper.fb = fb;
 326         nfbdev->helper.fbdev = info;
 327
 328         strcpy(info->fix.id, "nouveaufb");
 329         if (nouveau_nofbaccel)
 330                 info->flags = FBINFO_DEFAULT | FBINFO_HWACCEL_DISABLED;
 331         else
 332                 info->flags = FBINFO_DEFAULT | FBINFO_HWACCEL_COPYAREA |
 333                               FBINFO_HWACCEL_FILLRECT |
 334                               FBINFO_HWACCEL_IMAGEBLIT;
 335         info->flags |= FBINFO_CAN_FORCE_OUTPUT;
 336         info->fbops = &nouveau_fbcon_sw_ops;
 337         info->fix.smem_start = nvbo->bo.mem.bus.base +
 338                                nvbo->bo.mem.bus.offset;
 339         info->fix.smem_len = size;
 340
 341         info->screen_base = nvbo_kmap_obj_iovirtual(nouveau_fb->nvbo);
 342         info->screen_size = size;
 343
 344         drm_fb_helper_fill_fix(info, fb->pitches[0], fb->depth);
 345         drm_fb_helper_fill_var(info, &nfbdev->helper, sizes->fb_width, sizes->fb_height);
 346
 347         /* Set aperture base/size for vesafb takeover */
 348         info->apertures = dev_priv->apertures;
 349         if (!info->apertures) {
 350                 ret = -ENOMEM;
 351                 goto out_unref;
 352         }
 353
 354         /* Use default scratch pixmap (info->pixmap.flags = FB_PIXMAP_SYSTEM) */
 355
 356         mutex_unlock(&dev->struct_mutex);
 357
 358         if (dev_priv->channel && !nouveau_nofbaccel) {
 359                 ret = -ENODEV;
 360                 if (dev_priv->card_type < NV_50)
 361                         ret = nv04_fbcon_accel_init(info);
 362                 else
 363                 if (dev_priv->card_type < NV_C0)
 364                         ret = nv50_fbcon_accel_init(info);
 365                 else
 366                         ret = nvc0_fbcon_accel_init(info);
 367
 368                 if (ret == 0)
 369                         info->fbops = &nouveau_fbcon_ops;
 370         }
 371
 372         nouveau_fbcon_zfill(dev, nfbdev);
 373
 374         /* To allow resizeing without swapping buffers */
 375         NV_INFO(dev, "allocated %dx%d fb: 0x%lx, bo %p\n",
 376                                                 nouveau_fb->base.width,
 377                                                 nouveau_fb->base.height,
 378                                                 nvbo->bo.offset, nvbo);
 379
 380         vga_switcheroo_client_fb_set(dev->pdev, info);
 381         return 0;
 382
 383 out_unref:
 384         mutex_unlock(&dev->struct_mutex);
 385 out:
 386         return ret;
 387 }
 388
 389 static int
 390 nouveau_fbcon_find_or_create_single(struct drm_fb_helper *helper,
 391                                     struct drm_fb_helper_surface_size *sizes)
 392 {
 393         struct nouveau_fbdev *nfbdev = (struct nouveau_fbdev *)helper;
 394         int new_fb = 0;
 395         int ret;
 396
 397         if (!helper->fb) {
 398                 ret = nouveau_fbcon_create(nfbdev, sizes);
 399                 if (ret)
 400                         return ret;
 401                 new_fb = 1;
 402         }
 403         return new_fb;
 404 }
 405
 406 void
 407 nouveau_fbcon_output_poll_changed(struct drm_device *dev)
 408 {
 409         struct drm_nouveau_private *dev_priv = dev->dev_private;
 410         drm_fb_helper_hotplug_event(&dev_priv->nfbdev->helper);
 411 }
 412
 413 static int
 414 nouveau_fbcon_destroy(struct drm_device *dev, struct nouveau_fbdev *nfbdev)
 415 {
 416         struct nouveau_framebuffer *nouveau_fb = &nfbdev->nouveau_fb;
 417         struct fb_info *info;
 418
 419         if (nfbdev->helper.fbdev) {
 420                 info = nfbdev->helper.fbdev;
 421                 unregister_framebuffer(info);
 422                 if (info->cmap.len)
 423                         fb_dealloc_cmap(&info->cmap);
 424                 framebuffer_release(info);
 425         }
 426
 427         if (nouveau_fb->nvbo) {
 428                 nouveau_bo_unmap(nouveau_fb->nvbo);
 429                 nouveau_bo_vma_del(nouveau_fb->nvbo, &nouveau_fb->vma);
 430                 drm_gem_object_unreference_unlocked(nouveau_fb->nvbo->gem);
 431                 nouveau_fb->nvbo = NULL;
 432         }
 433         drm_fb_helper_fini(&nfbdev->helper);
 434         drm_framebuffer_cleanup(&nouveau_fb->base);
 435         return 0;
 436 }
 437
 438 void nouveau_fbcon_gpu_lockup(struct fb_info *info)
 439 {
 440         struct nouveau_fbdev *nfbdev = info->par;
 441         struct drm_device *dev = nfbdev->dev;
 442
 443         NV_ERROR(dev, "GPU lockup - switching to software fbcon\n");
 444         info->flags |= FBINFO_HWACCEL_DISABLED;
 445 }
 446
 447 static struct drm_fb_helper_funcs nouveau_fbcon_helper_funcs = {
 448         .gamma_set = nouveau_fbcon_gamma_set,
 449         .gamma_get = nouveau_fbcon_gamma_get,
 450         .fb_probe = nouveau_fbcon_find_or_create_single,
 451 };
 452
 453
 454 int nouveau_fbcon_init(struct drm_device *dev)
 455 {
 456         struct drm_nouveau_private *dev_priv = dev->dev_private;
 457         struct nouveau_fbdev *nfbdev;
 458         int preferred_bpp;
 459         int ret;
 460
 461         nfbdev = kzalloc(sizeof(struct nouveau_fbdev), GFP_KERNEL);
 462         if (!nfbdev)
 463                 return -ENOMEM;
 464
 465         nfbdev->dev = dev;
 466         dev_priv->nfbdev = nfbdev;
 467         nfbdev->helper.funcs = &nouveau_fbcon_helper_funcs;
 468
 469         ret = drm_fb_helper_init(dev, &nfbdev->helper,
 470                                  dev->mode_config.num_crtc, 4);
 471         if (ret) {
 472                 kfree(nfbdev);
 473                 return ret;
 474         }
 475
 476         drm_fb_helper_single_add_all_connectors(&nfbdev->helper);
 477
 478         if (dev_priv->vram_size <= 32 * 1024 * 1024)
 479                 preferred_bpp = 8;
 480         else if (dev_priv->vram_size <= 64 * 1024 * 1024)
 481                 preferred_bpp = 16;
 482         else
 483                 preferred_bpp = 32;
 484
 485         drm_fb_helper_initial_config(&nfbdev->helper, preferred_bpp);
 486         return 0;
 487 }
 488
 489 void nouveau_fbcon_fini(struct drm_device *dev)
 490 {
 491         struct drm_nouveau_private *dev_priv = dev->dev_private;
 492
 493         if (!dev_priv->nfbdev)
 494                 return;
 495
 496         nouveau_fbcon_destroy(dev, dev_priv->nfbdev);
 497         kfree(dev_priv->nfbdev);
 498         dev_priv->nfbdev = NULL;
 499 }
 500
 501 void nouveau_fbcon_save_disable_accel(struct drm_device *dev)
 502 {
 503         struct drm_nouveau_private *dev_priv = dev->dev_private;
 504
 505         dev_priv->nfbdev->saved_flags = dev_priv->nfbdev->helper.fbdev->flags;
 506         dev_priv->nfbdev->helper.fbdev->flags |= FBINFO_HWACCEL_DISABLED;
 507 }
 508
 509 void nouveau_fbcon_restore_accel(struct drm_device *dev)
 510 {
 511         struct drm_nouveau_private *dev_priv = dev->dev_private;
 512         dev_priv->nfbdev->helper.fbdev->flags = dev_priv->nfbdev->saved_flags;
 513 }
 514
 515 void nouveau_fbcon_set_suspend(struct drm_device *dev, int state)
 516 {
 517         struct drm_nouveau_private *dev_priv = dev->dev_private;
 518         console_lock();
 519         if (state == 0)
 520                 nouveau_fbcon_save_disable_accel(dev);
 521         fb_set_suspend(dev_priv->nfbdev->helper.fbdev, state);
 522         if (state == 1)
 523                 nouveau_fbcon_restore_accel(dev);
 524         console_unlock();
 525 }
 526
 527 void nouveau_fbcon_zfill_all(struct drm_device *dev)
 528 {
 529         struct drm_nouveau_private *dev_priv = dev->dev_private;
 530         nouveau_fbcon_zfill(dev, dev_priv->nfbdev);
 531 }