SAFE public projects git trees. - safe/jmp/linux-2.6/blob - 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 int
  53 nouveau_fbcon_sync(struct fb_info *info)
  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         struct nouveau_channel *chan = dev_priv->channel;
  59         int ret, i;
  60
  61         if (!chan || !chan->accel_done ||
  62             info->state != FBINFO_STATE_RUNNING ||
  63             info->flags & FBINFO_HWACCEL_DISABLED)
  64                 return 0;
  65
  66         if (RING_SPACE(chan, 4)) {
  67                 nouveau_fbcon_gpu_lockup(info);
  68                 return 0;
  69         }
  70
  71         BEGIN_RING(chan, 0, 0x0104, 1);
  72         OUT_RING(chan, 0);
  73         BEGIN_RING(chan, 0, 0x0100, 1);
  74         OUT_RING(chan, 0);
  75         nouveau_bo_wr32(chan->notifier_bo, chan->m2mf_ntfy + 3, 0xffffffff);
  76         FIRE_RING(chan);
  77
  78         ret = -EBUSY;
  79         for (i = 0; i < 100000; i++) {
  80                 if (!nouveau_bo_rd32(chan->notifier_bo, chan->m2mf_ntfy + 3)) {
  81                         ret = 0;
  82                         break;
  83                 }
  84                 DRM_UDELAY(1);
  85         }
  86
  87         if (ret) {
  88                 nouveau_fbcon_gpu_lockup(info);
  89                 return 0;
  90         }
  91
  92         chan->accel_done = false;
  93         return 0;
  94 }
  95
  96 static struct fb_ops nouveau_fbcon_ops = {
  97         .owner = THIS_MODULE,
  98         .fb_check_var = drm_fb_helper_check_var,
  99         .fb_set_par = drm_fb_helper_set_par,
 100         .fb_fillrect = cfb_fillrect,
 101         .fb_copyarea = cfb_copyarea,
 102         .fb_imageblit = cfb_imageblit,
 103         .fb_sync = nouveau_fbcon_sync,
 104         .fb_pan_display = drm_fb_helper_pan_display,
 105         .fb_blank = drm_fb_helper_blank,
 106         .fb_setcmap = drm_fb_helper_setcmap,
 107 };
 108
 109 static struct fb_ops nv04_fbcon_ops = {
 110         .owner = THIS_MODULE,
 111         .fb_check_var = drm_fb_helper_check_var,
 112         .fb_set_par = drm_fb_helper_set_par,
 113         .fb_fillrect = nv04_fbcon_fillrect,
 114         .fb_copyarea = nv04_fbcon_copyarea,
 115         .fb_imageblit = nv04_fbcon_imageblit,
 116         .fb_sync = nouveau_fbcon_sync,
 117         .fb_pan_display = drm_fb_helper_pan_display,
 118         .fb_blank = drm_fb_helper_blank,
 119         .fb_setcmap = drm_fb_helper_setcmap,
 120 };
 121
 122 static struct fb_ops nv50_fbcon_ops = {
 123         .owner = THIS_MODULE,
 124         .fb_check_var = drm_fb_helper_check_var,
 125         .fb_set_par = drm_fb_helper_set_par,
 126         .fb_fillrect = nv50_fbcon_fillrect,
 127         .fb_copyarea = nv50_fbcon_copyarea,
 128         .fb_imageblit = nv50_fbcon_imageblit,
 129         .fb_sync = nouveau_fbcon_sync,
 130         .fb_pan_display = drm_fb_helper_pan_display,
 131         .fb_blank = drm_fb_helper_blank,
 132         .fb_setcmap = drm_fb_helper_setcmap,
 133 };
 134
 135 static void nouveau_fbcon_gamma_set(struct drm_crtc *crtc, u16 red, u16 green,
 136                                     u16 blue, int regno)
 137 {
 138         struct nouveau_crtc *nv_crtc = nouveau_crtc(crtc);
 139
 140         nv_crtc->lut.r[regno] = red;
 141         nv_crtc->lut.g[regno] = green;
 142         nv_crtc->lut.b[regno] = blue;
 143 }
 144
 145 static void nouveau_fbcon_gamma_get(struct drm_crtc *crtc, u16 *red, u16 *green,
 146                                     u16 *blue, int regno)
 147 {
 148         struct nouveau_crtc *nv_crtc = nouveau_crtc(crtc);
 149
 150         *red = nv_crtc->lut.r[regno];
 151         *green = nv_crtc->lut.g[regno];
 152         *blue = nv_crtc->lut.b[regno];
 153 }
 154
 155 #if defined(__i386__) || defined(__x86_64__)
 156 static bool
 157 nouveau_fbcon_has_vesafb_or_efifb(struct drm_device *dev)
 158 {
 159         struct pci_dev *pdev = dev->pdev;
 160         int ramin;
 161
 162         if (screen_info.orig_video_isVGA != VIDEO_TYPE_VLFB &&
 163             screen_info.orig_video_isVGA != VIDEO_TYPE_EFI)
 164                 return false;
 165
 166         if (screen_info.lfb_base < pci_resource_start(pdev, 1))
 167                 goto not_fb;
 168
 169         if (screen_info.lfb_base + screen_info.lfb_size >=
 170             pci_resource_start(pdev, 1) + pci_resource_len(pdev, 1))
 171                 goto not_fb;
 172
 173         return true;
 174 not_fb:
 175         ramin = 2;
 176         if (pci_resource_len(pdev, ramin) == 0) {
 177                 ramin = 3;
 178                 if (pci_resource_len(pdev, ramin) == 0)
 179                         return false;
 180         }
 181
 182         if (screen_info.lfb_base < pci_resource_start(pdev, ramin))
 183                 return false;
 184
 185         if (screen_info.lfb_base + screen_info.lfb_size >=
 186             pci_resource_start(pdev, ramin) + pci_resource_len(pdev, ramin))
 187                 return false;
 188
 189         return true;
 190 }
 191 #endif
 192
 193 static void
 194 nouveau_fbcon_zfill(struct drm_device *dev, struct nouveau_fbdev *nfbdev)
 195 {
 196         struct fb_info *info = nfbdev->helper.fbdev;
 197         struct fb_fillrect rect;
 198
 199         /* Clear the entire fbcon.  The drm will program every connector
 200          * with it's preferred mode.  If the sizes differ, one display will
 201          * quite likely have garbage around the console.
 202          */
 203         rect.dx = rect.dy = 0;
 204         rect.width = info->var.xres_virtual;
 205         rect.height = info->var.yres_virtual;
 206         rect.color = 0;
 207         rect.rop = ROP_COPY;
 208         info->fbops->fb_fillrect(info, &rect);
 209 }
 210
 211 static int
 212 nouveau_fbcon_create(struct nouveau_fbdev *nfbdev,
 213                      struct drm_fb_helper_surface_size *sizes)
 214 {
 215         struct drm_device *dev = nfbdev->dev;
 216         struct drm_nouveau_private *dev_priv = dev->dev_private;
 217         struct fb_info *info;
 218         struct drm_framebuffer *fb;
 219         struct nouveau_framebuffer *nouveau_fb;
 220         struct nouveau_bo *nvbo;
 221         struct drm_mode_fb_cmd mode_cmd;
 222         struct device *device = &dev->pdev->dev;
 223         int size, ret;
 224
 225         mode_cmd.width = sizes->surface_width;
 226         mode_cmd.height = sizes->surface_height;
 227
 228         mode_cmd.bpp = sizes->surface_bpp;
 229         mode_cmd.pitch = mode_cmd.width * (mode_cmd.bpp >> 3);
 230         mode_cmd.pitch = roundup(mode_cmd.pitch, 256);
 231         mode_cmd.depth = sizes->surface_depth;
 232
 233         size = mode_cmd.pitch * mode_cmd.height;
 234         size = roundup(size, PAGE_SIZE);
 235
 236         ret = nouveau_gem_new(dev, dev_priv->channel, size, 0, TTM_PL_FLAG_VRAM,
 237                               0, 0x0000, false, true, &nvbo);
 238         if (ret) {
 239                 NV_ERROR(dev, "failed to allocate framebuffer\n");
 240                 goto out;
 241         }
 242
 243         ret = nouveau_bo_pin(nvbo, TTM_PL_FLAG_VRAM);
 244         if (ret) {
 245                 NV_ERROR(dev, "failed to pin fb: %d\n", ret);
 246                 nouveau_bo_ref(NULL, &nvbo);
 247                 goto out;
 248         }
 249
 250         ret = nouveau_bo_map(nvbo);
 251         if (ret) {
 252                 NV_ERROR(dev, "failed to map fb: %d\n", ret);
 253                 nouveau_bo_unpin(nvbo);
 254                 nouveau_bo_ref(NULL, &nvbo);
 255                 goto out;
 256         }
 257
 258         mutex_lock(&dev->struct_mutex);
 259
 260         info = framebuffer_alloc(0, device);
 261         if (!info) {
 262                 ret = -ENOMEM;
 263                 goto out_unref;
 264         }
 265
 266         ret = fb_alloc_cmap(&info->cmap, 256, 0);
 267         if (ret) {
 268                 ret = -ENOMEM;
 269                 goto out_unref;
 270         }
 271
 272         info->par = nfbdev;
 273
 274         nouveau_framebuffer_init(dev, &nfbdev->nouveau_fb, &mode_cmd, nvbo);
 275
 276         nouveau_fb = &nfbdev->nouveau_fb;
 277         fb = &nouveau_fb->base;
 278
 279         /* setup helper */
 280         nfbdev->helper.fb = fb;
 281         nfbdev->helper.fbdev = info;
 282
 283         strcpy(info->fix.id, "nouveaufb");
 284         if (nouveau_nofbaccel)
 285                 info->flags = FBINFO_DEFAULT | FBINFO_HWACCEL_DISABLED;
 286         else
 287                 info->flags = FBINFO_DEFAULT | FBINFO_HWACCEL_COPYAREA |
 288                               FBINFO_HWACCEL_FILLRECT |
 289                               FBINFO_HWACCEL_IMAGEBLIT;
 290         info->fbops = &nouveau_fbcon_ops;
 291         info->fix.smem_start = dev->mode_config.fb_base + nvbo->bo.offset -
 292                                dev_priv->vm_vram_base;
 293         info->fix.smem_len = size;
 294
 295         info->screen_base = nvbo_kmap_obj_iovirtual(nouveau_fb->nvbo);
 296         info->screen_size = size;
 297
 298         drm_fb_helper_fill_fix(info, fb->pitch, fb->depth);
 299         drm_fb_helper_fill_var(info, &nfbdev->helper, sizes->fb_width, sizes->fb_height);
 300
 301         /* FIXME: we really shouldn't expose mmio space at all */
 302         info->fix.mmio_start = pci_resource_start(dev->pdev, 1);
 303         info->fix.mmio_len = pci_resource_len(dev->pdev, 1);
 304
 305         /* Set aperture base/size for vesafb takeover */
 306 #if defined(__i386__) || defined(__x86_64__)
 307         if (nouveau_fbcon_has_vesafb_or_efifb(dev)) {
 308                 /* Some NVIDIA VBIOS' are stupid and decide to put the
 309                  * framebuffer in the middle of the PRAMIN BAR for
 310                  * whatever reason.  We need to know the exact lfb_base
 311                  * to get vesafb kicked off, and the only reliable way
 312                  * we have left is to find out lfb_base the same way
 313                  * vesafb did.
 314                  */
 315                 info->aperture_base = screen_info.lfb_base;
 316                 info->aperture_size = screen_info.lfb_size;
 317                 if (screen_info.orig_video_isVGA == VIDEO_TYPE_VLFB)
 318                         info->aperture_size *= 65536;
 319         } else
 320 #endif
 321         {
 322                 info->aperture_base = info->fix.mmio_start;
 323                 info->aperture_size = info->fix.mmio_len;
 324         }
 325
 326         info->pixmap.size = 64*1024;
 327         info->pixmap.buf_align = 8;
 328         info->pixmap.access_align = 32;
 329         info->pixmap.flags = FB_PIXMAP_SYSTEM;
 330         info->pixmap.scan_align = 1;
 331
 332         if (dev_priv->channel && !nouveau_nofbaccel) {
 333                 switch (dev_priv->card_type) {
 334                 case NV_50:
 335                         nv50_fbcon_accel_init(info);
 336                         info->fbops = &nv50_fbcon_ops;
 337                         break;
 338                 default:
 339                         nv04_fbcon_accel_init(info);
 340                         info->fbops = &nv04_fbcon_ops;
 341                         break;
 342                 };
 343         }
 344
 345         nouveau_fbcon_zfill(dev, nfbdev);
 346
 347         /* To allow resizeing without swapping buffers */
 348         NV_INFO(dev, "allocated %dx%d fb: 0x%lx, bo %p\n",
 349                                                 nouveau_fb->base.width,
 350                                                 nouveau_fb->base.height,
 351                                                 nvbo->bo.offset, nvbo);
 352
 353         mutex_unlock(&dev->struct_mutex);
 354         vga_switcheroo_client_fb_set(dev->pdev, info);
 355         return 0;
 356
 357 out_unref:
 358         mutex_unlock(&dev->struct_mutex);
 359 out:
 360         return ret;
 361 }
 362
 363 static int
 364 nouveau_fbcon_find_or_create_single(struct drm_fb_helper *helper,
 365                                     struct drm_fb_helper_surface_size *sizes)
 366 {
 367         struct nouveau_fbdev *nfbdev = (struct nouveau_fbdev *)helper;
 368         int new_fb = 0;
 369         int ret;
 370
 371         if (!helper->fb) {
 372                 ret = nouveau_fbcon_create(nfbdev, sizes);
 373                 if (ret)
 374                         return ret;
 375                 new_fb = 1;
 376         }
 377         return new_fb;
 378 }
 379
 380 void nouveau_fbcon_hotplug(struct drm_device *dev)
 381 {
 382         struct drm_nouveau_private *dev_priv = dev->dev_private;
 383         drm_helper_fb_hpd_irq_event(&dev_priv->nfbdev->helper);
 384 }
 385
 386 static void nouveau_fbcon_output_status_changed(struct drm_fb_helper *fb_helper)
 387 {
 388         drm_helper_fb_hotplug_event(fb_helper, true);
 389 }
 390
 391 int
 392 nouveau_fbcon_destroy(struct drm_device *dev, struct nouveau_fbdev *nfbdev)
 393 {
 394         struct nouveau_framebuffer *nouveau_fb = &nfbdev->nouveau_fb;
 395         struct fb_info *info;
 396
 397         if (nfbdev->helper.fbdev) {
 398                 info = nfbdev->helper.fbdev;
 399                 unregister_framebuffer(info);
 400                 if (info->cmap.len)
 401                         fb_dealloc_cmap(&info->cmap);
 402                 framebuffer_release(info);
 403         }
 404
 405         if (nouveau_fb->nvbo) {
 406                 nouveau_bo_unmap(nouveau_fb->nvbo);
 407                 drm_gem_object_unreference_unlocked(nouveau_fb->nvbo->gem);
 408                 nouveau_fb->nvbo = NULL;
 409         }
 410         drm_fb_helper_fini(&nfbdev->helper);
 411         drm_framebuffer_cleanup(&nouveau_fb->base);
 412         return 0;
 413 }
 414
 415 void nouveau_fbcon_gpu_lockup(struct fb_info *info)
 416 {
 417         struct nouveau_fbdev *nfbdev = info->par;
 418         struct drm_device *dev = nfbdev->dev;
 419
 420         NV_ERROR(dev, "GPU lockup - switching to software fbcon\n");
 421         info->flags |= FBINFO_HWACCEL_DISABLED;
 422 }
 423
 424 static struct drm_fb_helper_funcs nouveau_fbcon_helper_funcs = {
 425         .gamma_set = nouveau_fbcon_gamma_set,
 426         .gamma_get = nouveau_fbcon_gamma_get,
 427         .fb_probe = nouveau_fbcon_find_or_create_single,
 428         .fb_output_status_changed = nouveau_fbcon_output_status_changed,
 429 };
 430
 431
 432 int nouveau_fbcon_init(struct drm_device *dev)
 433 {
 434         struct drm_nouveau_private *dev_priv = dev->dev_private;
 435         struct nouveau_fbdev *nfbdev;
 436
 437         nfbdev = kzalloc(sizeof(struct nouveau_fbdev), GFP_KERNEL);
 438         if (!nfbdev)
 439                 return -ENOMEM;
 440
 441         nfbdev->dev = dev;
 442         dev_priv->nfbdev = nfbdev;
 443         nfbdev->helper.funcs = &nouveau_fbcon_helper_funcs;
 444
 445         drm_fb_helper_init(dev, &nfbdev->helper,
 446                            2, 4, true);
 447         drm_fb_helper_single_add_all_connectors(&nfbdev->helper);
 448         drm_fb_helper_initial_config(&nfbdev->helper, 32);
 449         return 0;
 450 }
 451
 452 void nouveau_fbcon_fini(struct drm_device *dev)
 453 {
 454         struct drm_nouveau_private *dev_priv = dev->dev_private;
 455
 456         if (!dev_priv->nfbdev)
 457                 return;
 458
 459         nouveau_fbcon_destroy(dev, dev_priv->nfbdev);
 460         kfree(dev_priv->nfbdev);
 461         dev_priv->nfbdev = NULL;
 462 }
 463
 464 void nouveau_fbcon_save_disable_accel(struct drm_device *dev)
 465 {
 466         struct drm_nouveau_private *dev_priv = dev->dev_private;
 467
 468         dev_priv->nfbdev->saved_flags = dev_priv->nfbdev->helper.fbdev->flags;
 469         dev_priv->nfbdev->helper.fbdev->flags |= FBINFO_HWACCEL_DISABLED;
 470 }
 471
 472 void nouveau_fbcon_restore_accel(struct drm_device *dev)
 473 {
 474         struct drm_nouveau_private *dev_priv = dev->dev_private;
 475         dev_priv->nfbdev->helper.fbdev->flags = dev_priv->nfbdev->saved_flags;
 476 }
 477
 478 void nouveau_fbcon_set_suspend(struct drm_device *dev, int state)
 479 {
 480         struct drm_nouveau_private *dev_priv = dev->dev_private;
 481         fb_set_suspend(dev_priv->nfbdev->helper.fbdev, state);
 482 }
 483
 484 void nouveau_fbcon_zfill_all(struct drm_device *dev)
 485 {
 486         struct drm_nouveau_private *dev_priv = dev->dev_private;
 487         nouveau_fbcon_zfill(dev, dev_priv->nfbdev);
 488 }