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/slab.h>
  34 #include <linux/sysrq.h>
  35 #include <linux/delay.h>
  36 #include <linux/fb.h>
  37 #include <linux/init.h>
  38 #include <linux/screen_info.h>
  39 #include <linux/vga_switcheroo.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 int
  54 nouveau_fbcon_sync(struct fb_info *info)
  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         struct nouveau_channel *chan = dev_priv->channel;
  60         int ret, i;
  61
  62         if (!chan || !chan->accel_done ||
  63             info->state != FBINFO_STATE_RUNNING ||
  64             info->flags & FBINFO_HWACCEL_DISABLED)
  65                 return 0;
  66
  67         if (RING_SPACE(chan, 4)) {
  68                 nouveau_fbcon_gpu_lockup(info);
  69                 return 0;
  70         }
  71
  72         BEGIN_RING(chan, 0, 0x0104, 1);
  73         OUT_RING(chan, 0);
  74         BEGIN_RING(chan, 0, 0x0100, 1);
  75         OUT_RING(chan, 0);
  76         nouveau_bo_wr32(chan->notifier_bo, chan->m2mf_ntfy + 3, 0xffffffff);
  77         FIRE_RING(chan);
  78
  79         ret = -EBUSY;
  80         for (i = 0; i < 100000; i++) {
  81                 if (!nouveau_bo_rd32(chan->notifier_bo, chan->m2mf_ntfy + 3)) {
  82                         ret = 0;
  83                         break;
  84                 }
  85                 DRM_UDELAY(1);
  86         }
  87
  88         if (ret) {
  89                 nouveau_fbcon_gpu_lockup(info);
  90                 return 0;
  91         }
  92
  93         chan->accel_done = false;
  94         return 0;
  95 }
  96
  97 static struct fb_ops nouveau_fbcon_ops = {
  98         .owner = THIS_MODULE,
  99         .fb_check_var = drm_fb_helper_check_var,
 100         .fb_set_par = drm_fb_helper_set_par,
 101         .fb_fillrect = cfb_fillrect,
 102         .fb_copyarea = cfb_copyarea,
 103         .fb_imageblit = cfb_imageblit,
 104         .fb_sync = nouveau_fbcon_sync,
 105         .fb_pan_display = drm_fb_helper_pan_display,
 106         .fb_blank = drm_fb_helper_blank,
 107         .fb_setcmap = drm_fb_helper_setcmap,
 108 };
 109
 110 static struct fb_ops nv04_fbcon_ops = {
 111         .owner = THIS_MODULE,
 112         .fb_check_var = drm_fb_helper_check_var,
 113         .fb_set_par = drm_fb_helper_set_par,
 114         .fb_fillrect = nv04_fbcon_fillrect,
 115         .fb_copyarea = nv04_fbcon_copyarea,
 116         .fb_imageblit = nv04_fbcon_imageblit,
 117         .fb_sync = nouveau_fbcon_sync,
 118         .fb_pan_display = drm_fb_helper_pan_display,
 119         .fb_blank = drm_fb_helper_blank,
 120         .fb_setcmap = drm_fb_helper_setcmap,
 121 };
 122
 123 static struct fb_ops nv50_fbcon_ops = {
 124         .owner = THIS_MODULE,
 125         .fb_check_var = drm_fb_helper_check_var,
 126         .fb_set_par = drm_fb_helper_set_par,
 127         .fb_fillrect = nv50_fbcon_fillrect,
 128         .fb_copyarea = nv50_fbcon_copyarea,
 129         .fb_imageblit = nv50_fbcon_imageblit,
 130         .fb_sync = nouveau_fbcon_sync,
 131         .fb_pan_display = drm_fb_helper_pan_display,
 132         .fb_blank = drm_fb_helper_blank,
 133         .fb_setcmap = drm_fb_helper_setcmap,
 134 };
 135
 136 static void nouveau_fbcon_gamma_set(struct drm_crtc *crtc, u16 red, u16 green,
 137                                     u16 blue, int regno)
 138 {
 139         struct nouveau_crtc *nv_crtc = nouveau_crtc(crtc);
 140
 141         nv_crtc->lut.r[regno] = red;
 142         nv_crtc->lut.g[regno] = green;
 143         nv_crtc->lut.b[regno] = blue;
 144 }
 145
 146 static void nouveau_fbcon_gamma_get(struct drm_crtc *crtc, u16 *red, u16 *green,
 147                                     u16 *blue, int regno)
 148 {
 149         struct nouveau_crtc *nv_crtc = nouveau_crtc(crtc);
 150
 151         *red = nv_crtc->lut.r[regno];
 152         *green = nv_crtc->lut.g[regno];
 153         *blue = nv_crtc->lut.b[regno];
 154 }
 155
 156 #if defined(__i386__) || defined(__x86_64__)
 157 static bool
 158 nouveau_fbcon_has_vesafb_or_efifb(struct drm_device *dev)
 159 {
 160         struct pci_dev *pdev = dev->pdev;
 161         int ramin;
 162
 163         if (screen_info.orig_video_isVGA != VIDEO_TYPE_VLFB &&
 164             screen_info.orig_video_isVGA != VIDEO_TYPE_EFI)
 165                 return false;
 166
 167         if (screen_info.lfb_base < pci_resource_start(pdev, 1))
 168                 goto not_fb;
 169
 170         if (screen_info.lfb_base + screen_info.lfb_size >=
 171             pci_resource_start(pdev, 1) + pci_resource_len(pdev, 1))
 172                 goto not_fb;
 173
 174         return true;
 175 not_fb:
 176         ramin = 2;
 177         if (pci_resource_len(pdev, ramin) == 0) {
 178                 ramin = 3;
 179                 if (pci_resource_len(pdev, ramin) == 0)
 180                         return false;
 181         }
 182
 183         if (screen_info.lfb_base < pci_resource_start(pdev, ramin))
 184                 return false;
 185
 186         if (screen_info.lfb_base + screen_info.lfb_size >=
 187             pci_resource_start(pdev, ramin) + pci_resource_len(pdev, ramin))
 188                 return false;
 189
 190         return true;
 191 }
 192 #endif
 193
 194 static void
 195 nouveau_fbcon_zfill(struct drm_device *dev, struct nouveau_fbdev *nfbdev)
 196 {
 197         struct fb_info *info = nfbdev->helper.fbdev;
 198         struct fb_fillrect rect;
 199
 200         /* Clear the entire fbcon.  The drm will program every connector
 201          * with it's preferred mode.  If the sizes differ, one display will
 202          * quite likely have garbage around the console.
 203          */
 204         rect.dx = rect.dy = 0;
 205         rect.width = info->var.xres_virtual;
 206         rect.height = info->var.yres_virtual;
 207         rect.color = 0;
 208         rect.rop = ROP_COPY;
 209         info->fbops->fb_fillrect(info, &rect);
 210 }
 211
 212 static int
 213 nouveau_fbcon_create(struct nouveau_fbdev *nfbdev,
 214                      struct drm_fb_helper_surface_size *sizes)
 215 {
 216         struct drm_device *dev = nfbdev->dev;
 217         struct drm_nouveau_private *dev_priv = dev->dev_private;
 218         struct fb_info *info;
 219         struct drm_framebuffer *fb;
 220         struct nouveau_framebuffer *nouveau_fb;
 221         struct nouveau_bo *nvbo;
 222         struct drm_mode_fb_cmd mode_cmd;
 223         struct device *device = &dev->pdev->dev;
 224         int size, ret;
 225
 226         mode_cmd.width = sizes->surface_width;
 227         mode_cmd.height = sizes->surface_height;
 228
 229         mode_cmd.bpp = sizes->surface_bpp;
 230         mode_cmd.pitch = mode_cmd.width * (mode_cmd.bpp >> 3);
 231         mode_cmd.pitch = roundup(mode_cmd.pitch, 256);
 232         mode_cmd.depth = sizes->surface_depth;
 233
 234         size = mode_cmd.pitch * mode_cmd.height;
 235         size = roundup(size, PAGE_SIZE);
 236
 237         ret = nouveau_gem_new(dev, dev_priv->channel, size, 0, TTM_PL_FLAG_VRAM,
 238                               0, 0x0000, false, true, &nvbo);
 239         if (ret) {
 240                 NV_ERROR(dev, "failed to allocate framebuffer\n");
 241                 goto out;
 242         }
 243
 244         ret = nouveau_bo_pin(nvbo, TTM_PL_FLAG_VRAM);
 245         if (ret) {
 246                 NV_ERROR(dev, "failed to pin fb: %d\n", ret);
 247                 nouveau_bo_ref(NULL, &nvbo);
 248                 goto out;
 249         }
 250
 251         ret = nouveau_bo_map(nvbo);
 252         if (ret) {
 253                 NV_ERROR(dev, "failed to map fb: %d\n", ret);
 254                 nouveau_bo_unpin(nvbo);
 255                 nouveau_bo_ref(NULL, &nvbo);
 256                 goto out;
 257         }
 258
 259         mutex_lock(&dev->struct_mutex);
 260
 261         info = framebuffer_alloc(0, device);
 262         if (!info) {
 263                 ret = -ENOMEM;
 264                 goto out_unref;
 265         }
 266
 267         ret = fb_alloc_cmap(&info->cmap, 256, 0);
 268         if (ret) {
 269                 ret = -ENOMEM;
 270                 goto out_unref;
 271         }
 272
 273         info->par = nfbdev;
 274
 275         nouveau_framebuffer_init(dev, &nfbdev->nouveau_fb, &mode_cmd, nvbo);
 276
 277         nouveau_fb = &nfbdev->nouveau_fb;
 278         fb = &nouveau_fb->base;
 279
 280         /* setup helper */
 281         nfbdev->helper.fb = fb;
 282         nfbdev->helper.fbdev = info;
 283
 284         strcpy(info->fix.id, "nouveaufb");
 285         if (nouveau_nofbaccel)
 286                 info->flags = FBINFO_DEFAULT | FBINFO_HWACCEL_DISABLED;
 287         else
 288                 info->flags = FBINFO_DEFAULT | FBINFO_HWACCEL_COPYAREA |
 289                               FBINFO_HWACCEL_FILLRECT |
 290                               FBINFO_HWACCEL_IMAGEBLIT;
 291         info->fbops = &nouveau_fbcon_ops;
 292         info->fix.smem_start = dev->mode_config.fb_base + nvbo->bo.offset -
 293                                dev_priv->vm_vram_base;
 294         info->fix.smem_len = size;
 295
 296         info->screen_base = nvbo_kmap_obj_iovirtual(nouveau_fb->nvbo);
 297         info->screen_size = size;
 298
 299         drm_fb_helper_fill_fix(info, fb->pitch, fb->depth);
 300         drm_fb_helper_fill_var(info, &nfbdev->helper, sizes->fb_width, sizes->fb_height);
 301
 302         /* FIXME: we really shouldn't expose mmio space at all */
 303         info->fix.mmio_start = pci_resource_start(dev->pdev, 1);
 304         info->fix.mmio_len = pci_resource_len(dev->pdev, 1);
 305
 306         /* Set aperture base/size for vesafb takeover */
 307 #if defined(__i386__) || defined(__x86_64__)
 308         if (nouveau_fbcon_has_vesafb_or_efifb(dev)) {
 309                 /* Some NVIDIA VBIOS' are stupid and decide to put the
 310                  * framebuffer in the middle of the PRAMIN BAR for
 311                  * whatever reason.  We need to know the exact lfb_base
 312                  * to get vesafb kicked off, and the only reliable way
 313                  * we have left is to find out lfb_base the same way
 314                  * vesafb did.
 315                  */
 316                 info->aperture_base = screen_info.lfb_base;
 317                 info->aperture_size = screen_info.lfb_size;
 318                 if (screen_info.orig_video_isVGA == VIDEO_TYPE_VLFB)
 319                         info->aperture_size *= 65536;
 320         } else
 321 #endif
 322         {
 323                 info->aperture_base = info->fix.mmio_start;
 324                 info->aperture_size = info->fix.mmio_len;
 325         }
 326
 327         info->pixmap.size = 64*1024;
 328         info->pixmap.buf_align = 8;
 329         info->pixmap.access_align = 32;
 330         info->pixmap.flags = FB_PIXMAP_SYSTEM;
 331         info->pixmap.scan_align = 1;
 332
 333         if (dev_priv->channel && !nouveau_nofbaccel) {
 334                 switch (dev_priv->card_type) {
 335                 case NV_50:
 336                         nv50_fbcon_accel_init(info);
 337                         info->fbops = &nv50_fbcon_ops;
 338                         break;
 339                 default:
 340                         nv04_fbcon_accel_init(info);
 341                         info->fbops = &nv04_fbcon_ops;
 342                         break;
 343                 };
 344         }
 345
 346         nouveau_fbcon_zfill(dev, nfbdev);
 347
 348         /* To allow resizeing without swapping buffers */
 349         NV_INFO(dev, "allocated %dx%d fb: 0x%lx, bo %p\n",
 350                                                 nouveau_fb->base.width,
 351                                                 nouveau_fb->base.height,
 352                                                 nvbo->bo.offset, nvbo);
 353
 354         mutex_unlock(&dev->struct_mutex);
 355         vga_switcheroo_client_fb_set(dev->pdev, info);
 356         return 0;
 357
 358 out_unref:
 359         mutex_unlock(&dev->struct_mutex);
 360 out:
 361         return ret;
 362 }
 363
 364 static int
 365 nouveau_fbcon_find_or_create_single(struct drm_fb_helper *helper,
 366                                     struct drm_fb_helper_surface_size *sizes)
 367 {
 368         struct nouveau_fbdev *nfbdev = (struct nouveau_fbdev *)helper;
 369         int new_fb = 0;
 370         int ret;
 371
 372         if (!helper->fb) {
 373                 ret = nouveau_fbcon_create(nfbdev, sizes);
 374                 if (ret)
 375                         return ret;
 376                 new_fb = 1;
 377         }
 378         return new_fb;
 379 }
 380
 381 void nouveau_fbcon_hotplug(struct drm_device *dev)
 382 {
 383         struct drm_nouveau_private *dev_priv = dev->dev_private;
 384         drm_helper_fb_hpd_irq_event(&dev_priv->nfbdev->helper);
 385 }
 386
 387 static void nouveau_fbcon_output_status_changed(struct drm_fb_helper *fb_helper)
 388 {
 389         drm_helper_fb_hotplug_event(fb_helper, true);
 390 }
 391
 392 int
 393 nouveau_fbcon_destroy(struct drm_device *dev, struct nouveau_fbdev *nfbdev)
 394 {
 395         struct nouveau_framebuffer *nouveau_fb = &nfbdev->nouveau_fb;
 396         struct fb_info *info;
 397
 398         if (nfbdev->helper.fbdev) {
 399                 info = nfbdev->helper.fbdev;
 400                 unregister_framebuffer(info);
 401                 if (info->cmap.len)
 402                         fb_dealloc_cmap(&info->cmap);
 403                 framebuffer_release(info);
 404         }
 405
 406         if (nouveau_fb->nvbo) {
 407                 nouveau_bo_unmap(nouveau_fb->nvbo);
 408                 drm_gem_object_unreference_unlocked(nouveau_fb->nvbo->gem);
 409                 nouveau_fb->nvbo = NULL;
 410         }
 411         drm_fb_helper_fini(&nfbdev->helper);
 412         drm_framebuffer_cleanup(&nouveau_fb->base);
 413         return 0;
 414 }
 415
 416 void nouveau_fbcon_gpu_lockup(struct fb_info *info)
 417 {
 418         struct nouveau_fbdev *nfbdev = info->par;
 419         struct drm_device *dev = nfbdev->dev;
 420
 421         NV_ERROR(dev, "GPU lockup - switching to software fbcon\n");
 422         info->flags |= FBINFO_HWACCEL_DISABLED;
 423 }
 424
 425 static struct drm_fb_helper_funcs nouveau_fbcon_helper_funcs = {
 426         .gamma_set = nouveau_fbcon_gamma_set,
 427         .gamma_get = nouveau_fbcon_gamma_get,
 428         .fb_probe = nouveau_fbcon_find_or_create_single,
 429         .fb_output_status_changed = nouveau_fbcon_output_status_changed,
 430 };
 431
 432
 433 int nouveau_fbcon_init(struct drm_device *dev)
 434 {
 435         struct drm_nouveau_private *dev_priv = dev->dev_private;
 436         struct nouveau_fbdev *nfbdev;
 437
 438         nfbdev = kzalloc(sizeof(struct nouveau_fbdev), GFP_KERNEL);
 439         if (!nfbdev)
 440                 return -ENOMEM;
 441
 442         nfbdev->dev = dev;
 443         dev_priv->nfbdev = nfbdev;
 444         nfbdev->helper.funcs = &nouveau_fbcon_helper_funcs;
 445
 446         drm_fb_helper_init(dev, &nfbdev->helper,
 447                            2, 4, true);
 448         drm_fb_helper_single_add_all_connectors(&nfbdev->helper);
 449         drm_fb_helper_initial_config(&nfbdev->helper, 32);
 450         return 0;
 451 }
 452
 453 void nouveau_fbcon_fini(struct drm_device *dev)
 454 {
 455         struct drm_nouveau_private *dev_priv = dev->dev_private;
 456
 457         if (!dev_priv->nfbdev)
 458                 return;
 459
 460         nouveau_fbcon_destroy(dev, dev_priv->nfbdev);
 461         kfree(dev_priv->nfbdev);
 462         dev_priv->nfbdev = NULL;
 463 }
 464
 465 void nouveau_fbcon_save_disable_accel(struct drm_device *dev)
 466 {
 467         struct drm_nouveau_private *dev_priv = dev->dev_private;
 468
 469         dev_priv->nfbdev->saved_flags = dev_priv->nfbdev->helper.fbdev->flags;
 470         dev_priv->nfbdev->helper.fbdev->flags |= FBINFO_HWACCEL_DISABLED;
 471 }
 472
 473 void nouveau_fbcon_restore_accel(struct drm_device *dev)
 474 {
 475         struct drm_nouveau_private *dev_priv = dev->dev_private;
 476         dev_priv->nfbdev->helper.fbdev->flags = dev_priv->nfbdev->saved_flags;
 477 }
 478
 479 void nouveau_fbcon_set_suspend(struct drm_device *dev, int state)
 480 {
 481         struct drm_nouveau_private *dev_priv = dev->dev_private;
 482         fb_set_suspend(dev_priv->nfbdev->helper.fbdev, state);
 483 }
 484
 485 void nouveau_fbcon_zfill_all(struct drm_device *dev)
 486 {
 487         struct drm_nouveau_private *dev_priv = dev->dev_private;
 488         nouveau_fbcon_zfill(dev, dev_priv->nfbdev);
 489 }