drivers/gpu/drm/nouveau/nv50_fifo.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_ramht.h"
  31 #include "nouveau_vm.h"
  32
  33 static void
  34 nv50_fifo_playlist_update(struct drm_device *dev)
  35 {
  36         struct drm_nouveau_private *dev_priv = dev->dev_private;
  37         struct nouveau_fifo_engine *pfifo = &dev_priv->engine.fifo;
  38         struct nouveau_gpuobj *cur;
  39         int i, nr;
  40
  41         NV_DEBUG(dev, "\n");
  42
  43         cur = pfifo->playlist[pfifo->cur_playlist];
  44         pfifo->cur_playlist = !pfifo->cur_playlist;
  45
  46         /* We never schedule channel 0 or 127 */
  47         for (i = 1, nr = 0; i < 127; i++) {
  48                 if (dev_priv->channels.ptr[i] &&
  49                     dev_priv->channels.ptr[i]->ramfc) {
  50                         nv_wo32(cur, (nr * 4), i);
  51                         nr++;
  52                 }
  53         }
  54         dev_priv->engine.instmem.flush(dev);
  55
  56         nv_wr32(dev, 0x32f4, cur->vinst >> 12);
  57         nv_wr32(dev, 0x32ec, nr);
  58         nv_wr32(dev, 0x2500, 0x101);
  59 }
  60
  61 static void
  62 nv50_fifo_channel_enable(struct drm_device *dev, int channel)
  63 {
  64         struct drm_nouveau_private *dev_priv = dev->dev_private;
  65         struct nouveau_channel *chan = dev_priv->channels.ptr[channel];
  66         uint32_t inst;
  67
  68         NV_DEBUG(dev, "ch%d\n", channel);
  69
  70         if (dev_priv->chipset == 0x50)
  71                 inst = chan->ramfc->vinst >> 12;
  72         else
  73                 inst = chan->ramfc->vinst >> 8;
  74
  75         nv_wr32(dev, NV50_PFIFO_CTX_TABLE(channel), inst |
  76                      NV50_PFIFO_CTX_TABLE_CHANNEL_ENABLED);
  77 }
  78
  79 static void
  80 nv50_fifo_channel_disable(struct drm_device *dev, int channel)
  81 {
  82         struct drm_nouveau_private *dev_priv = dev->dev_private;
  83         uint32_t inst;
  84
  85         NV_DEBUG(dev, "ch%d\n", channel);
  86
  87         if (dev_priv->chipset == 0x50)
  88                 inst = NV50_PFIFO_CTX_TABLE_INSTANCE_MASK_G80;
  89         else
  90                 inst = NV50_PFIFO_CTX_TABLE_INSTANCE_MASK_G84;
  91         nv_wr32(dev, NV50_PFIFO_CTX_TABLE(channel), inst);
  92 }
  93
  94 static void
  95 nv50_fifo_init_reset(struct drm_device *dev)
  96 {
  97         uint32_t pmc_e = NV_PMC_ENABLE_PFIFO;
  98
  99         NV_DEBUG(dev, "\n");
 100
 101         nv_wr32(dev, NV03_PMC_ENABLE, nv_rd32(dev, NV03_PMC_ENABLE) & ~pmc_e);
 102         nv_wr32(dev, NV03_PMC_ENABLE, nv_rd32(dev, NV03_PMC_ENABLE) |  pmc_e);
 103 }
 104
 105 static void
 106 nv50_fifo_init_intr(struct drm_device *dev)
 107 {
 108         NV_DEBUG(dev, "\n");
 109
 110         nouveau_irq_register(dev, 8, nv04_fifo_isr);
 111         nv_wr32(dev, NV03_PFIFO_INTR_0, 0xFFFFFFFF);
 112         nv_wr32(dev, NV03_PFIFO_INTR_EN_0, 0xFFFFFFFF);
 113 }
 114
 115 static void
 116 nv50_fifo_init_context_table(struct drm_device *dev)
 117 {
 118         struct drm_nouveau_private *dev_priv = dev->dev_private;
 119         int i;
 120
 121         NV_DEBUG(dev, "\n");
 122
 123         for (i = 0; i < NV50_PFIFO_CTX_TABLE__SIZE; i++) {
 124                 if (dev_priv->channels.ptr[i])
 125                         nv50_fifo_channel_enable(dev, i);
 126                 else
 127                         nv50_fifo_channel_disable(dev, i);
 128         }
 129
 130         nv50_fifo_playlist_update(dev);
 131 }
 132
 133 static void
 134 nv50_fifo_init_regs__nv(struct drm_device *dev)
 135 {
 136         NV_DEBUG(dev, "\n");
 137
 138         nv_wr32(dev, 0x250c, 0x6f3cfc34);
 139 }
 140
 141 static void
 142 nv50_fifo_init_regs(struct drm_device *dev)
 143 {
 144         NV_DEBUG(dev, "\n");
 145
 146         nv_wr32(dev, 0x2500, 0);
 147         nv_wr32(dev, 0x3250, 0);
 148         nv_wr32(dev, 0x3220, 0);
 149         nv_wr32(dev, 0x3204, 0);
 150         nv_wr32(dev, 0x3210, 0);
 151         nv_wr32(dev, 0x3270, 0);
 152         nv_wr32(dev, 0x2044, 0x01003fff);
 153
 154         /* Enable dummy channels setup by nv50_instmem.c */
 155         nv50_fifo_channel_enable(dev, 0);
 156         nv50_fifo_channel_enable(dev, 127);
 157 }
 158
 159 int
 160 nv50_fifo_init(struct drm_device *dev)
 161 {
 162         struct drm_nouveau_private *dev_priv = dev->dev_private;
 163         struct nouveau_fifo_engine *pfifo = &dev_priv->engine.fifo;
 164         int ret;
 165
 166         NV_DEBUG(dev, "\n");
 167
 168         if (pfifo->playlist[0]) {
 169                 pfifo->cur_playlist = !pfifo->cur_playlist;
 170                 goto just_reset;
 171         }
 172
 173         ret = nouveau_gpuobj_new(dev, NULL, 128*4, 0x1000,
 174                                  NVOBJ_FLAG_ZERO_ALLOC,
 175                                  &pfifo->playlist[0]);
 176         if (ret) {
 177                 NV_ERROR(dev, "error creating playlist 0: %d\n", ret);
 178                 return ret;
 179         }
 180
 181         ret = nouveau_gpuobj_new(dev, NULL, 128*4, 0x1000,
 182                                  NVOBJ_FLAG_ZERO_ALLOC,
 183                                  &pfifo->playlist[1]);
 184         if (ret) {
 185                 nouveau_gpuobj_ref(NULL, &pfifo->playlist[0]);
 186                 NV_ERROR(dev, "error creating playlist 1: %d\n", ret);
 187                 return ret;
 188         }
 189
 190 just_reset:
 191         nv50_fifo_init_reset(dev);
 192         nv50_fifo_init_intr(dev);
 193         nv50_fifo_init_context_table(dev);
 194         nv50_fifo_init_regs__nv(dev);
 195         nv50_fifo_init_regs(dev);
 196         nv_wr32(dev, NV03_PFIFO_CACHE1_PUSH0, 1);
 197         nv_wr32(dev, NV04_PFIFO_CACHE1_PULL0, 1);
 198         nv_wr32(dev, NV03_PFIFO_CACHES, 1);
 199
 200         return 0;
 201 }
 202
 203 void
 204 nv50_fifo_takedown(struct drm_device *dev)
 205 {
 206         struct drm_nouveau_private *dev_priv = dev->dev_private;
 207         struct nouveau_fifo_engine *pfifo = &dev_priv->engine.fifo;
 208
 209         NV_DEBUG(dev, "\n");
 210
 211         if (!pfifo->playlist[0])
 212                 return;
 213
 214         nv_wr32(dev, 0x2140, 0x00000000);
 215         nouveau_irq_unregister(dev, 8);
 216
 217         nouveau_gpuobj_ref(NULL, &pfifo->playlist[0]);
 218         nouveau_gpuobj_ref(NULL, &pfifo->playlist[1]);
 219 }
 220
 221 int
 222 nv50_fifo_create_context(struct nouveau_channel *chan)
 223 {
 224         struct drm_device *dev = chan->dev;
 225         struct drm_nouveau_private *dev_priv = dev->dev_private;
 226         struct nouveau_gpuobj *ramfc = NULL;
 227         uint64_t ib_offset = chan->pushbuf_base + chan->dma.ib_base * 4;
 228         unsigned long flags;
 229         int ret;
 230
 231         NV_DEBUG(dev, "ch%d\n", chan->id);
 232
 233         if (dev_priv->chipset == 0x50) {
 234                 ret = nouveau_gpuobj_new_fake(dev, chan->ramin->pinst,
 235                                               chan->ramin->vinst, 0x100,
 236                                               NVOBJ_FLAG_ZERO_ALLOC |
 237                                               NVOBJ_FLAG_ZERO_FREE,
 238                                               &chan->ramfc);
 239                 if (ret)
 240                         return ret;
 241
 242                 ret = nouveau_gpuobj_new_fake(dev, chan->ramin->pinst + 0x0400,
 243                                               chan->ramin->vinst + 0x0400,
 244                                               4096, 0, &chan->cache);
 245                 if (ret)
 246                         return ret;
 247         } else {
 248                 ret = nouveau_gpuobj_new(dev, chan, 0x100, 256,
 249                                          NVOBJ_FLAG_ZERO_ALLOC |
 250                                          NVOBJ_FLAG_ZERO_FREE, &chan->ramfc);
 251                 if (ret)
 252                         return ret;
 253
 254                 ret = nouveau_gpuobj_new(dev, chan, 4096, 1024,
 255                                          0, &chan->cache);
 256                 if (ret)
 257                         return ret;
 258         }
 259         ramfc = chan->ramfc;
 260
 261         chan->user = ioremap(pci_resource_start(dev->pdev, 0) +
 262                              NV50_USER(chan->id), PAGE_SIZE);
 263         if (!chan->user)
 264                 return -ENOMEM;
 265
 266         spin_lock_irqsave(&dev_priv->context_switch_lock, flags);
 267
 268         nv_wo32(ramfc, 0x48, chan->pushbuf->cinst >> 4);
 269         nv_wo32(ramfc, 0x80, ((chan->ramht->bits - 9) << 27) |
 270                              (4 << 24) /* SEARCH_FULL */ |
 271                              (chan->ramht->gpuobj->cinst >> 4));
 272         nv_wo32(ramfc, 0x44, 0x01003fff);
 273         nv_wo32(ramfc, 0x60, 0x7fffffff);
 274         nv_wo32(ramfc, 0x40, 0x00000000);
 275         nv_wo32(ramfc, 0x7c, 0x30000001);
 276         nv_wo32(ramfc, 0x78, 0x00000000);
 277         nv_wo32(ramfc, 0x3c, 0x403f6078);
 278         nv_wo32(ramfc, 0x50, lower_32_bits(ib_offset));
 279         nv_wo32(ramfc, 0x54, upper_32_bits(ib_offset) |
 280                 drm_order(chan->dma.ib_max + 1) << 16);
 281
 282         if (dev_priv->chipset != 0x50) {
 283                 nv_wo32(chan->ramin, 0, chan->id);
 284                 nv_wo32(chan->ramin, 4, chan->ramfc->vinst >> 8);
 285
 286                 nv_wo32(ramfc, 0x88, chan->cache->vinst >> 10);
 287                 nv_wo32(ramfc, 0x98, chan->ramin->vinst >> 12);
 288         }
 289
 290         dev_priv->engine.instmem.flush(dev);
 291
 292         nv50_fifo_channel_enable(dev, chan->id);
 293         nv50_fifo_playlist_update(dev);
 294         spin_unlock_irqrestore(&dev_priv->context_switch_lock, flags);
 295         return 0;
 296 }
 297
 298 void
 299 nv50_fifo_destroy_context(struct nouveau_channel *chan)
 300 {
 301         struct drm_device *dev = chan->dev;
 302         struct drm_nouveau_private *dev_priv = dev->dev_private;
 303         struct nouveau_fifo_engine *pfifo = &dev_priv->engine.fifo;
 304         struct nouveau_gpuobj *ramfc = NULL;
 305         unsigned long flags;
 306
 307         NV_DEBUG(dev, "ch%d\n", chan->id);
 308
 309         spin_lock_irqsave(&dev_priv->context_switch_lock, flags);
 310         nv_wr32(dev, NV03_PFIFO_CACHES, 0);
 311
 312         /* Unload the context if it's the currently active one */
 313         if ((nv_rd32(dev, NV03_PFIFO_CACHE1_PUSH1) & 0x7f) == chan->id) {
 314                 nv_mask(dev, NV04_PFIFO_CACHE1_DMA_PUSH, 0x00000001, 0);
 315                 nv_wr32(dev, NV03_PFIFO_CACHE1_PUSH0, 0);
 316                 nv_mask(dev, NV04_PFIFO_CACHE1_PULL0, 0x00000001, 0);
 317                 pfifo->unload_context(dev);
 318                 nv_wr32(dev, NV03_PFIFO_CACHE1_PUSH0, 1);
 319                 nv_wr32(dev, NV04_PFIFO_CACHE1_PULL0, 1);
 320         }
 321
 322         /* This will ensure the channel is seen as disabled. */
 323         nouveau_gpuobj_ref(chan->ramfc, &ramfc);
 324         nouveau_gpuobj_ref(NULL, &chan->ramfc);
 325         nv50_fifo_channel_disable(dev, chan->id);
 326
 327         /* Dummy channel, also used on ch 127 */
 328         if (chan->id == 0)
 329                 nv50_fifo_channel_disable(dev, 127);
 330         nv50_fifo_playlist_update(dev);
 331
 332         nv_wr32(dev, NV03_PFIFO_CACHES, 1);
 333         spin_unlock_irqrestore(&dev_priv->context_switch_lock, flags);
 334
 335         /* Free the channel resources */
 336         if (chan->user) {
 337                 iounmap(chan->user);
 338                 chan->user = NULL;
 339         }
 340         nouveau_gpuobj_ref(NULL, &ramfc);
 341         nouveau_gpuobj_ref(NULL, &chan->cache);
 342 }
 343
 344 int
 345 nv50_fifo_load_context(struct nouveau_channel *chan)
 346 {
 347         struct drm_device *dev = chan->dev;
 348         struct drm_nouveau_private *dev_priv = dev->dev_private;
 349         struct nouveau_gpuobj *ramfc = chan->ramfc;
 350         struct nouveau_gpuobj *cache = chan->cache;
 351         int ptr, cnt;
 352
 353         NV_DEBUG(dev, "ch%d\n", chan->id);
 354
 355         nv_wr32(dev, 0x3330, nv_ro32(ramfc, 0x00));
 356         nv_wr32(dev, 0x3334, nv_ro32(ramfc, 0x04));
 357         nv_wr32(dev, 0x3240, nv_ro32(ramfc, 0x08));
 358         nv_wr32(dev, 0x3320, nv_ro32(ramfc, 0x0c));
 359         nv_wr32(dev, 0x3244, nv_ro32(ramfc, 0x10));
 360         nv_wr32(dev, 0x3328, nv_ro32(ramfc, 0x14));
 361         nv_wr32(dev, 0x3368, nv_ro32(ramfc, 0x18));
 362         nv_wr32(dev, 0x336c, nv_ro32(ramfc, 0x1c));
 363         nv_wr32(dev, 0x3370, nv_ro32(ramfc, 0x20));
 364         nv_wr32(dev, 0x3374, nv_ro32(ramfc, 0x24));
 365         nv_wr32(dev, 0x3378, nv_ro32(ramfc, 0x28));
 366         nv_wr32(dev, 0x337c, nv_ro32(ramfc, 0x2c));
 367         nv_wr32(dev, 0x3228, nv_ro32(ramfc, 0x30));
 368         nv_wr32(dev, 0x3364, nv_ro32(ramfc, 0x34));
 369         nv_wr32(dev, 0x32a0, nv_ro32(ramfc, 0x38));
 370         nv_wr32(dev, 0x3224, nv_ro32(ramfc, 0x3c));
 371         nv_wr32(dev, 0x324c, nv_ro32(ramfc, 0x40));
 372         nv_wr32(dev, 0x2044, nv_ro32(ramfc, 0x44));
 373         nv_wr32(dev, 0x322c, nv_ro32(ramfc, 0x48));
 374         nv_wr32(dev, 0x3234, nv_ro32(ramfc, 0x4c));
 375         nv_wr32(dev, 0x3340, nv_ro32(ramfc, 0x50));
 376         nv_wr32(dev, 0x3344, nv_ro32(ramfc, 0x54));
 377         nv_wr32(dev, 0x3280, nv_ro32(ramfc, 0x58));
 378         nv_wr32(dev, 0x3254, nv_ro32(ramfc, 0x5c));
 379         nv_wr32(dev, 0x3260, nv_ro32(ramfc, 0x60));
 380         nv_wr32(dev, 0x3264, nv_ro32(ramfc, 0x64));
 381         nv_wr32(dev, 0x3268, nv_ro32(ramfc, 0x68));
 382         nv_wr32(dev, 0x326c, nv_ro32(ramfc, 0x6c));
 383         nv_wr32(dev, 0x32e4, nv_ro32(ramfc, 0x70));
 384         nv_wr32(dev, 0x3248, nv_ro32(ramfc, 0x74));
 385         nv_wr32(dev, 0x2088, nv_ro32(ramfc, 0x78));
 386         nv_wr32(dev, 0x2058, nv_ro32(ramfc, 0x7c));
 387         nv_wr32(dev, 0x2210, nv_ro32(ramfc, 0x80));
 388
 389         cnt = nv_ro32(ramfc, 0x84);
 390         for (ptr = 0; ptr < cnt; ptr++) {
 391                 nv_wr32(dev, NV40_PFIFO_CACHE1_METHOD(ptr),
 392                         nv_ro32(cache, (ptr * 8) + 0));
 393                 nv_wr32(dev, NV40_PFIFO_CACHE1_DATA(ptr),
 394                         nv_ro32(cache, (ptr * 8) + 4));
 395         }
 396         nv_wr32(dev, NV03_PFIFO_CACHE1_PUT, cnt << 2);
 397         nv_wr32(dev, NV03_PFIFO_CACHE1_GET, 0);
 398
 399         /* guessing that all the 0x34xx regs aren't on NV50 */
 400         if (dev_priv->chipset != 0x50) {
 401                 nv_wr32(dev, 0x340c, nv_ro32(ramfc, 0x88));
 402                 nv_wr32(dev, 0x3400, nv_ro32(ramfc, 0x8c));
 403                 nv_wr32(dev, 0x3404, nv_ro32(ramfc, 0x90));
 404                 nv_wr32(dev, 0x3408, nv_ro32(ramfc, 0x94));
 405                 nv_wr32(dev, 0x3410, nv_ro32(ramfc, 0x98));
 406         }
 407
 408         nv_wr32(dev, NV03_PFIFO_CACHE1_PUSH1, chan->id | (1<<16));
 409         return 0;
 410 }
 411
 412 int
 413 nv50_fifo_unload_context(struct drm_device *dev)
 414 {
 415         struct drm_nouveau_private *dev_priv = dev->dev_private;
 416         struct nouveau_gpuobj *ramfc, *cache;
 417         struct nouveau_channel *chan = NULL;
 418         int chid, get, put, ptr;
 419
 420         NV_DEBUG(dev, "\n");
 421
 422         chid = nv_rd32(dev, NV03_PFIFO_CACHE1_PUSH1) & 0x7f;
 423         if (chid < 1 || chid >= dev_priv->engine.fifo.channels - 1)
 424                 return 0;
 425
 426         chan = dev_priv->channels.ptr[chid];
 427         if (!chan) {
 428                 NV_ERROR(dev, "Inactive channel on PFIFO: %d\n", chid);
 429                 return -EINVAL;
 430         }
 431         NV_DEBUG(dev, "ch%d\n", chan->id);
 432         ramfc = chan->ramfc;
 433         cache = chan->cache;
 434
 435         nv_wo32(ramfc, 0x00, nv_rd32(dev, 0x3330));
 436         nv_wo32(ramfc, 0x04, nv_rd32(dev, 0x3334));
 437         nv_wo32(ramfc, 0x08, nv_rd32(dev, 0x3240));
 438         nv_wo32(ramfc, 0x0c, nv_rd32(dev, 0x3320));
 439         nv_wo32(ramfc, 0x10, nv_rd32(dev, 0x3244));
 440         nv_wo32(ramfc, 0x14, nv_rd32(dev, 0x3328));
 441         nv_wo32(ramfc, 0x18, nv_rd32(dev, 0x3368));
 442         nv_wo32(ramfc, 0x1c, nv_rd32(dev, 0x336c));
 443         nv_wo32(ramfc, 0x20, nv_rd32(dev, 0x3370));
 444         nv_wo32(ramfc, 0x24, nv_rd32(dev, 0x3374));
 445         nv_wo32(ramfc, 0x28, nv_rd32(dev, 0x3378));
 446         nv_wo32(ramfc, 0x2c, nv_rd32(dev, 0x337c));
 447         nv_wo32(ramfc, 0x30, nv_rd32(dev, 0x3228));
 448         nv_wo32(ramfc, 0x34, nv_rd32(dev, 0x3364));
 449         nv_wo32(ramfc, 0x38, nv_rd32(dev, 0x32a0));
 450         nv_wo32(ramfc, 0x3c, nv_rd32(dev, 0x3224));
 451         nv_wo32(ramfc, 0x40, nv_rd32(dev, 0x324c));
 452         nv_wo32(ramfc, 0x44, nv_rd32(dev, 0x2044));
 453         nv_wo32(ramfc, 0x48, nv_rd32(dev, 0x322c));
 454         nv_wo32(ramfc, 0x4c, nv_rd32(dev, 0x3234));
 455         nv_wo32(ramfc, 0x50, nv_rd32(dev, 0x3340));
 456         nv_wo32(ramfc, 0x54, nv_rd32(dev, 0x3344));
 457         nv_wo32(ramfc, 0x58, nv_rd32(dev, 0x3280));
 458         nv_wo32(ramfc, 0x5c, nv_rd32(dev, 0x3254));
 459         nv_wo32(ramfc, 0x60, nv_rd32(dev, 0x3260));
 460         nv_wo32(ramfc, 0x64, nv_rd32(dev, 0x3264));
 461         nv_wo32(ramfc, 0x68, nv_rd32(dev, 0x3268));
 462         nv_wo32(ramfc, 0x6c, nv_rd32(dev, 0x326c));
 463         nv_wo32(ramfc, 0x70, nv_rd32(dev, 0x32e4));
 464         nv_wo32(ramfc, 0x74, nv_rd32(dev, 0x3248));
 465         nv_wo32(ramfc, 0x78, nv_rd32(dev, 0x2088));
 466         nv_wo32(ramfc, 0x7c, nv_rd32(dev, 0x2058));
 467         nv_wo32(ramfc, 0x80, nv_rd32(dev, 0x2210));
 468
 469         put = (nv_rd32(dev, NV03_PFIFO_CACHE1_PUT) & 0x7ff) >> 2;
 470         get = (nv_rd32(dev, NV03_PFIFO_CACHE1_GET) & 0x7ff) >> 2;
 471         ptr = 0;
 472         while (put != get) {
 473                 nv_wo32(cache, ptr + 0,
 474                         nv_rd32(dev, NV40_PFIFO_CACHE1_METHOD(get)));
 475                 nv_wo32(cache, ptr + 4,
 476                         nv_rd32(dev, NV40_PFIFO_CACHE1_DATA(get)));
 477                 get = (get + 1) & 0x1ff;
 478                 ptr += 8;
 479         }
 480
 481         /* guessing that all the 0x34xx regs aren't on NV50 */
 482         if (dev_priv->chipset != 0x50) {
 483                 nv_wo32(ramfc, 0x84, ptr >> 3);
 484                 nv_wo32(ramfc, 0x88, nv_rd32(dev, 0x340c));
 485                 nv_wo32(ramfc, 0x8c, nv_rd32(dev, 0x3400));
 486                 nv_wo32(ramfc, 0x90, nv_rd32(dev, 0x3404));
 487                 nv_wo32(ramfc, 0x94, nv_rd32(dev, 0x3408));
 488                 nv_wo32(ramfc, 0x98, nv_rd32(dev, 0x3410));
 489         }
 490
 491         dev_priv->engine.instmem.flush(dev);
 492
 493         /*XXX: probably reload ch127 (NULL) state back too */
 494         nv_wr32(dev, NV03_PFIFO_CACHE1_PUSH1, 127);
 495         return 0;
 496 }
 497
 498 void
 499 nv50_fifo_tlb_flush(struct drm_device *dev)
 500 {
 501         nv50_vm_flush_engine(dev, 5);
 502 }