drivers/gpu/drm/nouveau/nv40_graph.c

   1 /*
   2  * Copyright (C) 2007 Ben Skeggs.
   3  * All Rights Reserved.
   4  *
   5  * Permission is hereby granted, free of charge, to any person obtaining
   6  * a copy of this software and associated documentation files (the
   7  * "Software"), to deal in the Software without restriction, including
   8  * without limitation the rights to use, copy, modify, merge, publish,
   9  * distribute, sublicense, and/or sell copies of the Software, and to
  10  * permit persons to whom the Software is furnished to do so, subject to
  11  * the following conditions:
  12  *
  13  * The above copyright notice and this permission notice (including the
  14  * next paragraph) shall be included in all copies or substantial
  15  * portions of the Software.
  16  *
  17  * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND,
  18  * EXPRESS OR IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF
  19  * MERCHANTABILITY, FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT.
  20  * IN NO EVENT SHALL THE COPYRIGHT OWNER(S) AND/OR ITS SUPPLIERS BE
  21  * LIABLE FOR ANY CLAIM, DAMAGES OR OTHER LIABILITY, WHETHER IN AN ACTION
  22  * OF CONTRACT, TORT OR OTHERWISE, ARISING FROM, OUT OF OR IN CONNECTION
  23  * WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE SOFTWARE.
  24  *
  25  */
  26
  27 #include "drmP.h"
  28 #include "drm.h"
  29 #include "nouveau_drv.h"
  30 #include "nouveau_grctx.h"
  31
  32 static int nv40_graph_register(struct drm_device *);
  33 static void nv40_graph_isr(struct drm_device *);
  34
  35 struct nouveau_channel *
  36 nv40_graph_channel(struct drm_device *dev)
  37 {
  38         struct drm_nouveau_private *dev_priv = dev->dev_private;
  39         uint32_t inst;
  40         int i;
  41
  42         inst = nv_rd32(dev, NV40_PGRAPH_CTXCTL_CUR);
  43         if (!(inst & NV40_PGRAPH_CTXCTL_CUR_LOADED))
  44                 return NULL;
  45         inst = (inst & NV40_PGRAPH_CTXCTL_CUR_INSTANCE) << 4;
  46
  47         for (i = 0; i < dev_priv->engine.fifo.channels; i++) {
  48                 struct nouveau_channel *chan = dev_priv->channels.ptr[i];
  49
  50                 if (chan && chan->ramin_grctx &&
  51                     chan->ramin_grctx->pinst == inst)
  52                         return chan;
  53         }
  54
  55         return NULL;
  56 }
  57
  58 int
  59 nv40_graph_create_context(struct nouveau_channel *chan)
  60 {
  61         struct drm_device *dev = chan->dev;
  62         struct drm_nouveau_private *dev_priv = dev->dev_private;
  63         struct nouveau_pgraph_engine *pgraph = &dev_priv->engine.graph;
  64         struct nouveau_grctx ctx = {};
  65         unsigned long flags;
  66         int ret;
  67
  68         ret = nouveau_gpuobj_new(dev, chan, pgraph->grctx_size, 16,
  69                                  NVOBJ_FLAG_ZERO_ALLOC, &chan->ramin_grctx);
  70         if (ret)
  71                 return ret;
  72
  73         /* Initialise default context values */
  74         ctx.dev = chan->dev;
  75         ctx.mode = NOUVEAU_GRCTX_VALS;
  76         ctx.data = chan->ramin_grctx;
  77         nv40_grctx_init(&ctx);
  78
  79         nv_wo32(chan->ramin_grctx, 0, chan->ramin_grctx->pinst);
  80
  81         /* init grctx pointer in ramfc, and on PFIFO if channel is
  82          * already active there
  83          */
  84         spin_lock_irqsave(&dev_priv->context_switch_lock, flags);
  85         nv_wo32(chan->ramfc, 0x38, chan->ramin_grctx->pinst >> 4);
  86         nv_mask(dev, 0x002500, 0x00000001, 0x00000000);
  87         if ((nv_rd32(dev, 0x003204) & 0x0000001f) == chan->id)
  88                 nv_wr32(dev, 0x0032e0, chan->ramin_grctx->pinst >> 4);
  89         nv_mask(dev, 0x002500, 0x00000001, 0x00000001);
  90         spin_unlock_irqrestore(&dev_priv->context_switch_lock, flags);
  91         return 0;
  92 }
  93
  94 void
  95 nv40_graph_destroy_context(struct nouveau_channel *chan)
  96 {
  97         struct drm_device *dev = chan->dev;
  98         struct drm_nouveau_private *dev_priv = dev->dev_private;
  99         struct nouveau_pgraph_engine *pgraph = &dev_priv->engine.graph;
 100         unsigned long flags;
 101
 102         spin_lock_irqsave(&dev_priv->context_switch_lock, flags);
 103         pgraph->fifo_access(dev, false);
 104
 105         /* Unload the context if it's the currently active one */
 106         if (pgraph->channel(dev) == chan)
 107                 pgraph->unload_context(dev);
 108
 109         pgraph->fifo_access(dev, true);
 110         spin_unlock_irqrestore(&dev_priv->context_switch_lock, flags);
 111
 112         /* Free the context resources */
 113         nouveau_gpuobj_ref(NULL, &chan->ramin_grctx);
 114 }
 115
 116 static int
 117 nv40_graph_transfer_context(struct drm_device *dev, uint32_t inst, int save)
 118 {
 119         uint32_t old_cp, tv = 1000, tmp;
 120         int i;
 121
 122         old_cp = nv_rd32(dev, NV20_PGRAPH_CHANNEL_CTX_POINTER);
 123         nv_wr32(dev, NV20_PGRAPH_CHANNEL_CTX_POINTER, inst);
 124
 125         tmp  = nv_rd32(dev, NV40_PGRAPH_CTXCTL_0310);
 126         tmp |= save ? NV40_PGRAPH_CTXCTL_0310_XFER_SAVE :
 127                       NV40_PGRAPH_CTXCTL_0310_XFER_LOAD;
 128         nv_wr32(dev, NV40_PGRAPH_CTXCTL_0310, tmp);
 129
 130         tmp  = nv_rd32(dev, NV40_PGRAPH_CTXCTL_0304);
 131         tmp |= NV40_PGRAPH_CTXCTL_0304_XFER_CTX;
 132         nv_wr32(dev, NV40_PGRAPH_CTXCTL_0304, tmp);
 133
 134         nouveau_wait_for_idle(dev);
 135
 136         for (i = 0; i < tv; i++) {
 137                 if (nv_rd32(dev, NV40_PGRAPH_CTXCTL_030C) == 0)
 138                         break;
 139         }
 140
 141         nv_wr32(dev, NV20_PGRAPH_CHANNEL_CTX_POINTER, old_cp);
 142
 143         if (i == tv) {
 144                 uint32_t ucstat = nv_rd32(dev, NV40_PGRAPH_CTXCTL_UCODE_STAT);
 145                 NV_ERROR(dev, "Failed: Instance=0x%08x Save=%d\n", inst, save);
 146                 NV_ERROR(dev, "IP: 0x%02x, Opcode: 0x%08x\n",
 147                          ucstat >> NV40_PGRAPH_CTXCTL_UCODE_STAT_IP_SHIFT,
 148                          ucstat  & NV40_PGRAPH_CTXCTL_UCODE_STAT_OP_MASK);
 149                 NV_ERROR(dev, "0x40030C = 0x%08x\n",
 150                          nv_rd32(dev, NV40_PGRAPH_CTXCTL_030C));
 151                 return -EBUSY;
 152         }
 153
 154         return 0;
 155 }
 156
 157 /* Restore the context for a specific channel into PGRAPH */
 158 int
 159 nv40_graph_load_context(struct nouveau_channel *chan)
 160 {
 161         struct drm_device *dev = chan->dev;
 162         uint32_t inst;
 163         int ret;
 164
 165         if (!chan->ramin_grctx)
 166                 return -EINVAL;
 167         inst = chan->ramin_grctx->pinst >> 4;
 168
 169         ret = nv40_graph_transfer_context(dev, inst, 0);
 170         if (ret)
 171                 return ret;
 172
 173         /* 0x40032C, no idea of it's exact function.  Could simply be a
 174          * record of the currently active PGRAPH context.  It's currently
 175          * unknown as to what bit 24 does.  The nv ddx has it set, so we will
 176          * set it here too.
 177          */
 178         nv_wr32(dev, NV20_PGRAPH_CHANNEL_CTX_POINTER, inst);
 179         nv_wr32(dev, NV40_PGRAPH_CTXCTL_CUR,
 180                  (inst & NV40_PGRAPH_CTXCTL_CUR_INSTANCE) |
 181                   NV40_PGRAPH_CTXCTL_CUR_LOADED);
 182         /* 0x32E0 records the instance address of the active FIFO's PGRAPH
 183          * context.  If at any time this doesn't match 0x40032C, you will
 184          * recieve PGRAPH_INTR_CONTEXT_SWITCH
 185          */
 186         nv_wr32(dev, NV40_PFIFO_GRCTX_INSTANCE, inst);
 187         return 0;
 188 }
 189
 190 int
 191 nv40_graph_unload_context(struct drm_device *dev)
 192 {
 193         uint32_t inst;
 194         int ret;
 195
 196         inst = nv_rd32(dev, NV40_PGRAPH_CTXCTL_CUR);
 197         if (!(inst & NV40_PGRAPH_CTXCTL_CUR_LOADED))
 198                 return 0;
 199         inst &= NV40_PGRAPH_CTXCTL_CUR_INSTANCE;
 200
 201         ret = nv40_graph_transfer_context(dev, inst, 1);
 202
 203         nv_wr32(dev, NV40_PGRAPH_CTXCTL_CUR, inst);
 204         return ret;
 205 }
 206
 207 void
 208 nv40_graph_set_tile_region(struct drm_device *dev, int i)
 209 {
 210         struct drm_nouveau_private *dev_priv = dev->dev_private;
 211         struct nouveau_tile_reg *tile = &dev_priv->tile.reg[i];
 212
 213         switch (dev_priv->chipset) {
 214         case 0x40:
 215         case 0x41: /* guess */
 216         case 0x42:
 217         case 0x43:
 218         case 0x45: /* guess */
 219         case 0x4e:
 220                 nv_wr32(dev, NV20_PGRAPH_TSIZE(i), tile->pitch);
 221                 nv_wr32(dev, NV20_PGRAPH_TLIMIT(i), tile->limit);
 222                 nv_wr32(dev, NV20_PGRAPH_TILE(i), tile->addr);
 223                 nv_wr32(dev, NV40_PGRAPH_TSIZE1(i), tile->pitch);
 224                 nv_wr32(dev, NV40_PGRAPH_TLIMIT1(i), tile->limit);
 225                 nv_wr32(dev, NV40_PGRAPH_TILE1(i), tile->addr);
 226                 break;
 227         case 0x44:
 228         case 0x4a:
 229                 nv_wr32(dev, NV20_PGRAPH_TSIZE(i), tile->pitch);
 230                 nv_wr32(dev, NV20_PGRAPH_TLIMIT(i), tile->limit);
 231                 nv_wr32(dev, NV20_PGRAPH_TILE(i), tile->addr);
 232                 break;
 233         case 0x46:
 234         case 0x47:
 235         case 0x49:
 236         case 0x4b:
 237         case 0x4c:
 238         case 0x67:
 239         default:
 240                 nv_wr32(dev, NV47_PGRAPH_TSIZE(i), tile->pitch);
 241                 nv_wr32(dev, NV47_PGRAPH_TLIMIT(i), tile->limit);
 242                 nv_wr32(dev, NV47_PGRAPH_TILE(i), tile->addr);
 243                 nv_wr32(dev, NV40_PGRAPH_TSIZE1(i), tile->pitch);
 244                 nv_wr32(dev, NV40_PGRAPH_TLIMIT1(i), tile->limit);
 245                 nv_wr32(dev, NV40_PGRAPH_TILE1(i), tile->addr);
 246                 break;
 247         }
 248 }
 249
 250 /*
 251  * G70          0x47
 252  * G71          0x49
 253  * NV45         0x48
 254  * G72[M]       0x46
 255  * G73          0x4b
 256  * C51_G7X      0x4c
 257  * C51          0x4e
 258  */
 259 int
 260 nv40_graph_init(struct drm_device *dev)
 261 {
 262         struct drm_nouveau_private *dev_priv =
 263                 (struct drm_nouveau_private *)dev->dev_private;
 264         struct nouveau_fb_engine *pfb = &dev_priv->engine.fb;
 265         struct nouveau_grctx ctx = {};
 266         uint32_t vramsz, *cp;
 267         int ret, i, j;
 268
 269         nv_wr32(dev, NV03_PMC_ENABLE, nv_rd32(dev, NV03_PMC_ENABLE) &
 270                         ~NV_PMC_ENABLE_PGRAPH);
 271         nv_wr32(dev, NV03_PMC_ENABLE, nv_rd32(dev, NV03_PMC_ENABLE) |
 272                          NV_PMC_ENABLE_PGRAPH);
 273
 274         cp = kmalloc(sizeof(*cp) * 256, GFP_KERNEL);
 275         if (!cp)
 276                 return -ENOMEM;
 277
 278         ctx.dev = dev;
 279         ctx.mode = NOUVEAU_GRCTX_PROG;
 280         ctx.data = cp;
 281         ctx.ctxprog_max = 256;
 282         nv40_grctx_init(&ctx);
 283         dev_priv->engine.graph.grctx_size = ctx.ctxvals_pos * 4;
 284
 285         nv_wr32(dev, NV40_PGRAPH_CTXCTL_UCODE_INDEX, 0);
 286         for (i = 0; i < ctx.ctxprog_len; i++)
 287                 nv_wr32(dev, NV40_PGRAPH_CTXCTL_UCODE_DATA, cp[i]);
 288
 289         kfree(cp);
 290
 291         ret = nv40_graph_register(dev);
 292         if (ret)
 293                 return ret;
 294
 295         /* No context present currently */
 296         nv_wr32(dev, NV40_PGRAPH_CTXCTL_CUR, 0x00000000);
 297
 298         nouveau_irq_register(dev, 12, nv40_graph_isr);
 299         nv_wr32(dev, NV03_PGRAPH_INTR   , 0xFFFFFFFF);
 300         nv_wr32(dev, NV40_PGRAPH_INTR_EN, 0xFFFFFFFF);
 301
 302         nv_wr32(dev, NV04_PGRAPH_DEBUG_0, 0xFFFFFFFF);
 303         nv_wr32(dev, NV04_PGRAPH_DEBUG_0, 0x00000000);
 304         nv_wr32(dev, NV04_PGRAPH_DEBUG_1, 0x401287c0);
 305         nv_wr32(dev, NV04_PGRAPH_DEBUG_3, 0xe0de8055);
 306         nv_wr32(dev, NV10_PGRAPH_DEBUG_4, 0x00008000);
 307         nv_wr32(dev, NV04_PGRAPH_LIMIT_VIOL_PIX, 0x00be3c5f);
 308
 309         nv_wr32(dev, NV10_PGRAPH_CTX_CONTROL, 0x10010100);
 310         nv_wr32(dev, NV10_PGRAPH_STATE      , 0xFFFFFFFF);
 311
 312         j = nv_rd32(dev, 0x1540) & 0xff;
 313         if (j) {
 314                 for (i = 0; !(j & 1); j >>= 1, i++)
 315                         ;
 316                 nv_wr32(dev, 0x405000, i);
 317         }
 318
 319         if (dev_priv->chipset == 0x40) {
 320                 nv_wr32(dev, 0x4009b0, 0x83280fff);
 321                 nv_wr32(dev, 0x4009b4, 0x000000a0);
 322         } else {
 323                 nv_wr32(dev, 0x400820, 0x83280eff);
 324                 nv_wr32(dev, 0x400824, 0x000000a0);
 325         }
 326
 327         switch (dev_priv->chipset) {
 328         case 0x40:
 329         case 0x45:
 330                 nv_wr32(dev, 0x4009b8, 0x0078e366);
 331                 nv_wr32(dev, 0x4009bc, 0x0000014c);
 332                 break;
 333         case 0x41:
 334         case 0x42: /* pciid also 0x00Cx */
 335         /* case 0x0120: XXX (pciid) */
 336                 nv_wr32(dev, 0x400828, 0x007596ff);
 337                 nv_wr32(dev, 0x40082c, 0x00000108);
 338                 break;
 339         case 0x43:
 340                 nv_wr32(dev, 0x400828, 0x0072cb77);
 341                 nv_wr32(dev, 0x40082c, 0x00000108);
 342                 break;
 343         case 0x44:
 344         case 0x46: /* G72 */
 345         case 0x4a:
 346         case 0x4c: /* G7x-based C51 */
 347         case 0x4e:
 348                 nv_wr32(dev, 0x400860, 0);
 349                 nv_wr32(dev, 0x400864, 0);
 350                 break;
 351         case 0x47: /* G70 */
 352         case 0x49: /* G71 */
 353         case 0x4b: /* G73 */
 354                 nv_wr32(dev, 0x400828, 0x07830610);
 355                 nv_wr32(dev, 0x40082c, 0x0000016A);
 356                 break;
 357         default:
 358                 break;
 359         }
 360
 361         nv_wr32(dev, 0x400b38, 0x2ffff800);
 362         nv_wr32(dev, 0x400b3c, 0x00006000);
 363
 364         /* Tiling related stuff. */
 365         switch (dev_priv->chipset) {
 366         case 0x44:
 367         case 0x4a:
 368                 nv_wr32(dev, 0x400bc4, 0x1003d888);
 369                 nv_wr32(dev, 0x400bbc, 0xb7a7b500);
 370                 break;
 371         case 0x46:
 372                 nv_wr32(dev, 0x400bc4, 0x0000e024);
 373                 nv_wr32(dev, 0x400bbc, 0xb7a7b520);
 374                 break;
 375         case 0x4c:
 376         case 0x4e:
 377         case 0x67:
 378                 nv_wr32(dev, 0x400bc4, 0x1003d888);
 379                 nv_wr32(dev, 0x400bbc, 0xb7a7b540);
 380                 break;
 381         default:
 382                 break;
 383         }
 384
 385         /* Turn all the tiling regions off. */
 386         for (i = 0; i < pfb->num_tiles; i++)
 387                 nv40_graph_set_tile_region(dev, i);
 388
 389         /* begin RAM config */
 390         vramsz = pci_resource_len(dev->pdev, 0) - 1;
 391         switch (dev_priv->chipset) {
 392         case 0x40:
 393                 nv_wr32(dev, 0x4009A4, nv_rd32(dev, NV04_PFB_CFG0));
 394                 nv_wr32(dev, 0x4009A8, nv_rd32(dev, NV04_PFB_CFG1));
 395                 nv_wr32(dev, 0x4069A4, nv_rd32(dev, NV04_PFB_CFG0));
 396                 nv_wr32(dev, 0x4069A8, nv_rd32(dev, NV04_PFB_CFG1));
 397                 nv_wr32(dev, 0x400820, 0);
 398                 nv_wr32(dev, 0x400824, 0);
 399                 nv_wr32(dev, 0x400864, vramsz);
 400                 nv_wr32(dev, 0x400868, vramsz);
 401                 break;
 402         default:
 403                 switch (dev_priv->chipset) {
 404                 case 0x41:
 405                 case 0x42:
 406                 case 0x43:
 407                 case 0x45:
 408                 case 0x4e:
 409                 case 0x44:
 410                 case 0x4a:
 411                         nv_wr32(dev, 0x4009F0, nv_rd32(dev, NV04_PFB_CFG0));
 412                         nv_wr32(dev, 0x4009F4, nv_rd32(dev, NV04_PFB_CFG1));
 413                         break;
 414                 default:
 415                         nv_wr32(dev, 0x400DF0, nv_rd32(dev, NV04_PFB_CFG0));
 416                         nv_wr32(dev, 0x400DF4, nv_rd32(dev, NV04_PFB_CFG1));
 417                         break;
 418                 }
 419                 nv_wr32(dev, 0x4069F0, nv_rd32(dev, NV04_PFB_CFG0));
 420                 nv_wr32(dev, 0x4069F4, nv_rd32(dev, NV04_PFB_CFG1));
 421                 nv_wr32(dev, 0x400840, 0);
 422                 nv_wr32(dev, 0x400844, 0);
 423                 nv_wr32(dev, 0x4008A0, vramsz);
 424                 nv_wr32(dev, 0x4008A4, vramsz);
 425                 break;
 426         }
 427
 428         return 0;
 429 }
 430
 431 void nv40_graph_takedown(struct drm_device *dev)
 432 {
 433         nouveau_irq_unregister(dev, 12);
 434 }
 435
 436 static int
 437 nv40_graph_register(struct drm_device *dev)
 438 {
 439         struct drm_nouveau_private *dev_priv = dev->dev_private;
 440
 441         if (dev_priv->engine.graph.registered)
 442                 return 0;
 443
 444         NVOBJ_CLASS(dev, 0x506e, SW); /* nvsw */
 445         NVOBJ_CLASS(dev, 0x0030, GR); /* null */
 446         NVOBJ_CLASS(dev, 0x0039, GR); /* m2mf */
 447         NVOBJ_CLASS(dev, 0x004a, GR); /* gdirect */
 448         NVOBJ_CLASS(dev, 0x009f, GR); /* imageblit (nv12) */
 449         NVOBJ_CLASS(dev, 0x008a, GR); /* ifc */
 450         NVOBJ_CLASS(dev, 0x0089, GR); /* sifm */
 451         NVOBJ_CLASS(dev, 0x3089, GR); /* sifm (nv40) */
 452         NVOBJ_CLASS(dev, 0x0062, GR); /* surf2d */
 453         NVOBJ_CLASS(dev, 0x3062, GR); /* surf2d (nv40) */
 454         NVOBJ_CLASS(dev, 0x0043, GR); /* rop */
 455         NVOBJ_CLASS(dev, 0x0012, GR); /* beta1 */
 456         NVOBJ_CLASS(dev, 0x0072, GR); /* beta4 */
 457         NVOBJ_CLASS(dev, 0x0019, GR); /* cliprect */
 458         NVOBJ_CLASS(dev, 0x0044, GR); /* pattern */
 459         NVOBJ_CLASS(dev, 0x309e, GR); /* swzsurf */
 460
 461         /* curie */
 462         if (nv44_graph_class(dev))
 463                 NVOBJ_CLASS(dev, 0x4497, GR);
 464         else
 465                 NVOBJ_CLASS(dev, 0x4097, GR);
 466
 467         /* nvsw */
 468         NVOBJ_CLASS(dev, 0x506e, SW);
 469         NVOBJ_MTHD (dev, 0x506e, 0x0500, nv04_graph_mthd_page_flip);
 470
 471         dev_priv->engine.graph.registered = true;
 472         return 0;
 473 }
 474
 475 static int
 476 nv40_graph_isr_chid(struct drm_device *dev, u32 inst)
 477 {
 478         struct drm_nouveau_private *dev_priv = dev->dev_private;
 479         struct nouveau_channel *chan;
 480         unsigned long flags;
 481         int i;
 482
 483         spin_lock_irqsave(&dev_priv->channels.lock, flags);
 484         for (i = 0; i < dev_priv->engine.fifo.channels; i++) {
 485                 chan = dev_priv->channels.ptr[i];
 486                 if (!chan || !chan->ramin_grctx)
 487                         continue;
 488
 489                 if (inst == chan->ramin_grctx->pinst)
 490                         break;
 491         }
 492         spin_unlock_irqrestore(&dev_priv->channels.lock, flags);
 493         return i;
 494 }
 495
 496 static void
 497 nv40_graph_isr(struct drm_device *dev)
 498 {
 499         u32 stat;
 500
 501         while ((stat = nv_rd32(dev, NV03_PGRAPH_INTR))) {
 502                 u32 nsource = nv_rd32(dev, NV03_PGRAPH_NSOURCE);
 503                 u32 nstatus = nv_rd32(dev, NV03_PGRAPH_NSTATUS);
 504                 u32 inst = (nv_rd32(dev, 0x40032c) & 0x000fffff) << 4;
 505                 u32 chid = nv40_graph_isr_chid(dev, inst);
 506                 u32 addr = nv_rd32(dev, NV04_PGRAPH_TRAPPED_ADDR);
 507                 u32 subc = (addr & 0x00070000) >> 16;
 508                 u32 mthd = (addr & 0x00001ffc);
 509                 u32 data = nv_rd32(dev, NV04_PGRAPH_TRAPPED_DATA);
 510                 u32 class = nv_rd32(dev, 0x400160 + subc * 4) & 0xffff;
 511                 u32 show = stat;
 512
 513                 if (stat & NV_PGRAPH_INTR_ERROR) {
 514                         if (nsource & NV03_PGRAPH_NSOURCE_ILLEGAL_MTHD) {
 515                                 if (!nouveau_gpuobj_mthd_call2(dev, chid, class, mthd, data))
 516                                         show &= ~NV_PGRAPH_INTR_ERROR;
 517                         } else
 518                         if (nsource & NV03_PGRAPH_NSOURCE_DMA_VTX_PROTECTION) {
 519                                 nv_mask(dev, 0x402000, 0, 0);
 520                         }
 521                 }
 522
 523                 nv_wr32(dev, NV03_PGRAPH_INTR, stat);
 524                 nv_wr32(dev, NV04_PGRAPH_FIFO, 0x00000001);
 525
 526                 if (show && nouveau_ratelimit()) {
 527                         NV_INFO(dev, "PGRAPH -");
 528                         nouveau_bitfield_print(nv10_graph_intr, show);
 529                         printk(" nsource:");
 530                         nouveau_bitfield_print(nv04_graph_nsource, nsource);
 531                         printk(" nstatus:");
 532                         nouveau_bitfield_print(nv10_graph_nstatus, nstatus);
 533                         printk("\n");
 534                         NV_INFO(dev, "PGRAPH - ch %d (0x%08x) subc %d "
 535                                      "class 0x%04x mthd 0x%04x data 0x%08x\n",
 536                                 chid, inst, subc, class, mthd, data);
 537                 }
 538         }
 539 }