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