release/src-rt-6.x.4708/linux/linux-2.6.36/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 static void
 156 nouveau_fbcon_zfill(struct drm_device *dev, struct nouveau_fbdev *nfbdev)
 157 {
 158         struct fb_info *info = nfbdev->helper.fbdev;
 159         struct fb_fillrect rect;
 160
 161         /* Clear the entire fbcon.  The drm will program every connector
 162          * with it's preferred mode.  If the sizes differ, one display will
 163          * quite likely have garbage around the console.
 164          */
 165         rect.dx = rect.dy = 0;
 166         rect.width = info->var.xres_virtual;
 167         rect.height = info->var.yres_virtual;
 168         rect.color = 0;
 169         rect.rop = ROP_COPY;
 170         info->fbops->fb_fillrect(info, &rect);
 171 }
 172
 173 static int
 174 nouveau_fbcon_create(struct nouveau_fbdev *nfbdev,
 175                      struct drm_fb_helper_surface_size *sizes)
 176 {
 177         struct drm_device *dev = nfbdev->dev;
 178         struct drm_nouveau_private *dev_priv = dev->dev_private;
 179         struct fb_info *info;
 180         struct drm_framebuffer *fb;
 181         struct nouveau_framebuffer *nouveau_fb;
 182         struct nouveau_bo *nvbo;
 183         struct drm_mode_fb_cmd mode_cmd;
 184         struct pci_dev *pdev = dev->pdev;
 185         struct device *device = &pdev->dev;
 186         int size, ret;
 187
 188         mode_cmd.width = sizes->surface_width;
 189         mode_cmd.height = sizes->surface_height;
 190
 191         mode_cmd.bpp = sizes->surface_bpp;
 192         mode_cmd.pitch = mode_cmd.width * (mode_cmd.bpp >> 3);
 193         mode_cmd.pitch = roundup(mode_cmd.pitch, 256);
 194         mode_cmd.depth = sizes->surface_depth;
 195
 196         size = mode_cmd.pitch * mode_cmd.height;
 197         size = roundup(size, PAGE_SIZE);
 198
 199         ret = nouveau_gem_new(dev, dev_priv->channel, size, 0, TTM_PL_FLAG_VRAM,
 200                               0, 0x0000, false, true, &nvbo);
 201         if (ret) {
 202                 NV_ERROR(dev, "failed to allocate framebuffer\n");
 203                 goto out;
 204         }
 205
 206         ret = nouveau_bo_pin(nvbo, TTM_PL_FLAG_VRAM);
 207         if (ret) {
 208                 NV_ERROR(dev, "failed to pin fb: %d\n", ret);
 209                 nouveau_bo_ref(NULL, &nvbo);
 210                 goto out;
 211         }
 212
 213         ret = nouveau_bo_map(nvbo);
 214         if (ret) {
 215                 NV_ERROR(dev, "failed to map fb: %d\n", ret);
 216                 nouveau_bo_unpin(nvbo);
 217                 nouveau_bo_ref(NULL, &nvbo);
 218                 goto out;
 219         }
 220
 221         mutex_lock(&dev->struct_mutex);
 222
 223         info = framebuffer_alloc(0, device);
 224         if (!info) {
 225                 ret = -ENOMEM;
 226                 goto out_unref;
 227         }
 228
 229         ret = fb_alloc_cmap(&info->cmap, 256, 0);
 230         if (ret) {
 231                 ret = -ENOMEM;
 232                 goto out_unref;
 233         }
 234
 235         info->par = nfbdev;
 236
 237         nouveau_framebuffer_init(dev, &nfbdev->nouveau_fb, &mode_cmd, nvbo);
 238
 239         nouveau_fb = &nfbdev->nouveau_fb;
 240         fb = &nouveau_fb->base;
 241
 242         /* setup helper */
 243         nfbdev->helper.fb = fb;
 244         nfbdev->helper.fbdev = info;
 245
 246         strcpy(info->fix.id, "nouveaufb");
 247         if (nouveau_nofbaccel)
 248                 info->flags = FBINFO_DEFAULT | FBINFO_HWACCEL_DISABLED;
 249         else
 250                 info->flags = FBINFO_DEFAULT | FBINFO_HWACCEL_COPYAREA |
 251                               FBINFO_HWACCEL_FILLRECT |
 252                               FBINFO_HWACCEL_IMAGEBLIT;
 253         info->flags |= FBINFO_CAN_FORCE_OUTPUT;
 254         info->fbops = &nouveau_fbcon_ops;
 255         info->fix.smem_start = dev->mode_config.fb_base + nvbo->bo.offset -
 256                                dev_priv->vm_vram_base;
 257         info->fix.smem_len = size;
 258
 259         info->screen_base = nvbo_kmap_obj_iovirtual(nouveau_fb->nvbo);
 260         info->screen_size = size;
 261
 262         drm_fb_helper_fill_fix(info, fb->pitch, fb->depth);
 263         drm_fb_helper_fill_var(info, &nfbdev->helper, sizes->fb_width, sizes->fb_height);
 264
 265         info->fix.mmio_start = pci_resource_start(pdev, 1);
 266         info->fix.mmio_len = pci_resource_len(pdev, 1);
 267
 268         /* Set aperture base/size for vesafb takeover */
 269         info->apertures = dev_priv->apertures;
 270         if (!info->apertures) {
 271                 ret = -ENOMEM;
 272                 goto out_unref;
 273         }
 274
 275         info->pixmap.size = 64*1024;
 276         info->pixmap.buf_align = 8;
 277         info->pixmap.access_align = 32;
 278         info->pixmap.flags = FB_PIXMAP_SYSTEM;
 279         info->pixmap.scan_align = 1;
 280
 281         if (dev_priv->channel && !nouveau_nofbaccel) {
 282                 switch (dev_priv->card_type) {
 283                 case NV_C0:
 284                         break;
 285                 case NV_50:
 286                         nv50_fbcon_accel_init(info);
 287                         info->fbops = &nv50_fbcon_ops;
 288                         break;
 289                 default:
 290                         nv04_fbcon_accel_init(info);
 291                         info->fbops = &nv04_fbcon_ops;
 292                         break;
 293                 };
 294         }
 295
 296         nouveau_fbcon_zfill(dev, nfbdev);
 297
 298         /* To allow resizeing without swapping buffers */
 299         NV_INFO(dev, "allocated %dx%d fb: 0x%lx, bo %p\n",
 300                                                 nouveau_fb->base.width,
 301                                                 nouveau_fb->base.height,
 302                                                 nvbo->bo.offset, nvbo);
 303
 304         mutex_unlock(&dev->struct_mutex);
 305         vga_switcheroo_client_fb_set(dev->pdev, info);
 306         return 0;
 307
 308 out_unref:
 309         mutex_unlock(&dev->struct_mutex);
 310 out:
 311         return ret;
 312 }
 313
 314 static int
 315 nouveau_fbcon_find_or_create_single(struct drm_fb_helper *helper,
 316                                     struct drm_fb_helper_surface_size *sizes)
 317 {
 318         struct nouveau_fbdev *nfbdev = (struct nouveau_fbdev *)helper;
 319         int new_fb = 0;
 320         int ret;
 321
 322         if (!helper->fb) {
 323                 ret = nouveau_fbcon_create(nfbdev, sizes);
 324                 if (ret)
 325                         return ret;
 326                 new_fb = 1;
 327         }
 328         return new_fb;
 329 }
 330
 331 void
 332 nouveau_fbcon_output_poll_changed(struct drm_device *dev)
 333 {
 334         struct drm_nouveau_private *dev_priv = dev->dev_private;
 335         drm_fb_helper_hotplug_event(&dev_priv->nfbdev->helper);
 336 }
 337
 338 static int
 339 nouveau_fbcon_destroy(struct drm_device *dev, struct nouveau_fbdev *nfbdev)
 340 {
 341         struct nouveau_framebuffer *nouveau_fb = &nfbdev->nouveau_fb;
 342         struct fb_info *info;
 343
 344         if (nfbdev->helper.fbdev) {
 345                 info = nfbdev->helper.fbdev;
 346                 unregister_framebuffer(info);
 347                 if (info->cmap.len)
 348                         fb_dealloc_cmap(&info->cmap);
 349                 framebuffer_release(info);
 350         }
 351
 352         if (nouveau_fb->nvbo) {
 353                 nouveau_bo_unmap(nouveau_fb->nvbo);
 354                 drm_gem_object_unreference_unlocked(nouveau_fb->nvbo->gem);
 355                 nouveau_fb->nvbo = NULL;
 356         }
 357         drm_fb_helper_fini(&nfbdev->helper);
 358         drm_framebuffer_cleanup(&nouveau_fb->base);
 359         return 0;
 360 }
 361
 362 void nouveau_fbcon_gpu_lockup(struct fb_info *info)
 363 {
 364         struct nouveau_fbdev *nfbdev = info->par;
 365         struct drm_device *dev = nfbdev->dev;
 366
 367         NV_ERROR(dev, "GPU lockup - switching to software fbcon\n");
 368         info->flags |= FBINFO_HWACCEL_DISABLED;
 369 }
 370
 371 static struct drm_fb_helper_funcs nouveau_fbcon_helper_funcs = {
 372         .gamma_set = nouveau_fbcon_gamma_set,
 373         .gamma_get = nouveau_fbcon_gamma_get,
 374         .fb_probe = nouveau_fbcon_find_or_create_single,
 375 };
 376
 377
 378 int nouveau_fbcon_init(struct drm_device *dev)
 379 {
 380         struct drm_nouveau_private *dev_priv = dev->dev_private;
 381         struct nouveau_fbdev *nfbdev;
 382         int ret;
 383
 384         nfbdev = kzalloc(sizeof(struct nouveau_fbdev), GFP_KERNEL);
 385         if (!nfbdev)
 386                 return -ENOMEM;
 387
 388         nfbdev->dev = dev;
 389         dev_priv->nfbdev = nfbdev;
 390         nfbdev->helper.funcs = &nouveau_fbcon_helper_funcs;
 391
 392         ret = drm_fb_helper_init(dev, &nfbdev->helper,
 393                                  nv_two_heads(dev) ? 2 : 1, 4);
 394         if (ret) {
 395                 kfree(nfbdev);
 396                 return ret;
 397         }
 398
 399         drm_fb_helper_single_add_all_connectors(&nfbdev->helper);
 400         drm_fb_helper_initial_config(&nfbdev->helper, 32);
 401         return 0;
 402 }
 403
 404 void nouveau_fbcon_fini(struct drm_device *dev)
 405 {
 406         struct drm_nouveau_private *dev_priv = dev->dev_private;
 407
 408         if (!dev_priv->nfbdev)
 409                 return;
 410
 411         nouveau_fbcon_destroy(dev, dev_priv->nfbdev);
 412         kfree(dev_priv->nfbdev);
 413         dev_priv->nfbdev = NULL;
 414 }
 415
 416 void nouveau_fbcon_save_disable_accel(struct drm_device *dev)
 417 {
 418         struct drm_nouveau_private *dev_priv = dev->dev_private;
 419
 420         dev_priv->nfbdev->saved_flags = dev_priv->nfbdev->helper.fbdev->flags;
 421         dev_priv->nfbdev->helper.fbdev->flags |= FBINFO_HWACCEL_DISABLED;
 422 }
 423
 424 void nouveau_fbcon_restore_accel(struct drm_device *dev)
 425 {
 426         struct drm_nouveau_private *dev_priv = dev->dev_private;
 427         dev_priv->nfbdev->helper.fbdev->flags = dev_priv->nfbdev->saved_flags;
 428 }
 429
 430 void nouveau_fbcon_set_suspend(struct drm_device *dev, int state)
 431 {
 432         struct drm_nouveau_private *dev_priv = dev->dev_private;
 433         fb_set_suspend(dev_priv->nfbdev->helper.fbdev, state);
 434 }
 435
 436 void nouveau_fbcon_zfill_all(struct drm_device *dev)
 437 {
 438         struct drm_nouveau_private *dev_priv = dev->dev_private;
 439         nouveau_fbcon_zfill(dev, dev_priv->nfbdev);
 440 }