drivers/gpu/drm/nouveau/nv50_instmem.c

   1 /*
   2  * Copyright (C) 2007 Ben Skeggs.
   3  *
   4  * All Rights Reserved.
   5  *
   6  * Permission is hereby granted, free of charge, to any person obtaining
   7  * a copy of this software and associated documentation files (the
   8  * "Software"), to deal in the Software without restriction, including
   9  * without limitation the rights to use, copy, modify, merge, publish,
  10  * distribute, sublicense, and/or sell copies of the Software, and to
  11  * permit persons to whom the Software is furnished to do so, subject to
  12  * the following conditions:
  13  *
  14  * The above copyright notice and this permission notice (including the
  15  * next paragraph) shall be included in all copies or substantial
  16  * portions of the Software.
  17  *
  18  * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND,
  19  * EXPRESS OR IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF
  20  * MERCHANTABILITY, FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT.
  21  * IN NO EVENT SHALL THE COPYRIGHT OWNER(S) AND/OR ITS SUPPLIERS BE
  22  * LIABLE FOR ANY CLAIM, DAMAGES OR OTHER LIABILITY, WHETHER IN AN ACTION
  23  * OF CONTRACT, TORT OR OTHERWISE, ARISING FROM, OUT OF OR IN CONNECTION
  24  * WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE SOFTWARE.
  25  *
  26  */
  27
  28 #include "drmP.h"
  29 #include "drm.h"
  30 #include "nouveau_drv.h"
  31
  32 struct nv50_instmem_priv {
  33         uint32_t save1700[5]; /* 0x1700->0x1710 */
  34
  35         struct nouveau_gpuobj_ref *pramin_pt;
  36         struct nouveau_gpuobj_ref *pramin_bar;
  37         struct nouveau_gpuobj_ref *fb_bar;
  38 };
  39
  40 #define NV50_INSTMEM_PAGE_SHIFT 12
  41 #define NV50_INSTMEM_PAGE_SIZE  (1 << NV50_INSTMEM_PAGE_SHIFT)
  42 #define NV50_INSTMEM_PT_SIZE(a) (((a) >> 12) << 3)
  43
  44 /*NOTE: - Assumes 0x1700 already covers the correct MiB of PRAMIN
  45  */
  46 #define BAR0_WI32(g, o, v) do {                                   \
  47         uint32_t offset;                                          \
  48         if ((g)->im_backing) {                                    \
  49                 offset = (g)->im_backing_start;                   \
  50         } else {                                                  \
  51                 offset  = chan->ramin->gpuobj->im_backing_start;  \
  52                 offset += (g)->im_pramin->start;                  \
  53         }                                                         \
  54         offset += (o);                                            \
  55         nv_wr32(dev, NV_RAMIN + (offset & 0xfffff), (v));              \
  56 } while (0)
  57
  58 int
  59 nv50_instmem_init(struct drm_device *dev)
  60 {
  61         struct drm_nouveau_private *dev_priv = dev->dev_private;
  62         struct nouveau_channel *chan;
  63         uint32_t c_offset, c_size, c_ramfc, c_vmpd, c_base, pt_size;
  64         uint32_t save_nv001700;
  65         uint64_t v;
  66         struct nv50_instmem_priv *priv;
  67         int ret, i;
  68
  69         priv = kzalloc(sizeof(*priv), GFP_KERNEL);
  70         if (!priv)
  71                 return -ENOMEM;
  72         dev_priv->engine.instmem.priv = priv;
  73
  74         /* Save state, will restore at takedown. */
  75         for (i = 0x1700; i <= 0x1710; i += 4)
  76                 priv->save1700[(i-0x1700)/4] = nv_rd32(dev, i);
  77
  78         /* Reserve the last MiB of VRAM, we should probably try to avoid
  79          * setting up the below tables over the top of the VBIOS image at
  80          * some point.
  81          */
  82         dev_priv->ramin_rsvd_vram = 1 << 20;
  83         c_offset = dev_priv->vram_size - dev_priv->ramin_rsvd_vram;
  84         c_size   = 128 << 10;
  85         c_vmpd   = ((dev_priv->chipset & 0xf0) == 0x50) ? 0x1400 : 0x200;
  86         c_ramfc  = ((dev_priv->chipset & 0xf0) == 0x50) ? 0x0 : 0x20;
  87         c_base   = c_vmpd + 0x4000;
  88         pt_size  = NV50_INSTMEM_PT_SIZE(dev_priv->ramin_size);
  89
  90         NV_DEBUG(dev, " Rsvd VRAM base: 0x%08x\n", c_offset);
  91         NV_DEBUG(dev, "    VBIOS image: 0x%08x\n",
  92                                 (nv_rd32(dev, 0x619f04) & ~0xff) << 8);
  93         NV_DEBUG(dev, "  Aperture size: %d MiB\n", dev_priv->ramin_size >> 20);
  94         NV_DEBUG(dev, "        PT size: %d KiB\n", pt_size >> 10);
  95
  96         /* Determine VM layout, we need to do this first to make sure
  97          * we allocate enough memory for all the page tables.
  98          */
  99         dev_priv->vm_gart_base = roundup(NV50_VM_BLOCK, NV50_VM_BLOCK);
 100         dev_priv->vm_gart_size = NV50_VM_BLOCK;
 101
 102         dev_priv->vm_vram_base = dev_priv->vm_gart_base + dev_priv->vm_gart_size;
 103         dev_priv->vm_vram_size = dev_priv->vram_size;
 104         if (dev_priv->vm_vram_size > NV50_VM_MAX_VRAM)
 105                 dev_priv->vm_vram_size = NV50_VM_MAX_VRAM;
 106         dev_priv->vm_vram_size = roundup(dev_priv->vm_vram_size, NV50_VM_BLOCK);
 107         dev_priv->vm_vram_pt_nr = dev_priv->vm_vram_size / NV50_VM_BLOCK;
 108
 109         dev_priv->vm_end = dev_priv->vm_vram_base + dev_priv->vm_vram_size;
 110
 111         NV_DEBUG(dev, "NV50VM: GART 0x%016llx-0x%016llx\n",
 112                  dev_priv->vm_gart_base,
 113                  dev_priv->vm_gart_base + dev_priv->vm_gart_size - 1);
 114         NV_DEBUG(dev, "NV50VM: VRAM 0x%016llx-0x%016llx\n",
 115                  dev_priv->vm_vram_base,
 116                  dev_priv->vm_vram_base + dev_priv->vm_vram_size - 1);
 117
 118         c_size += dev_priv->vm_vram_pt_nr * (NV50_VM_BLOCK / 65536 * 8);
 119
 120         /* Map BAR0 PRAMIN aperture over the memory we want to use */
 121         save_nv001700 = nv_rd32(dev, NV50_PUNK_BAR0_PRAMIN);
 122         nv_wr32(dev, NV50_PUNK_BAR0_PRAMIN, (c_offset >> 16));
 123
 124         /* Create a fake channel, and use it as our "dummy" channels 0/127.
 125          * The main reason for creating a channel is so we can use the gpuobj
 126          * code.  However, it's probably worth noting that NVIDIA also setup
 127          * their channels 0/127 with the same values they configure here.
 128          * So, there may be some other reason for doing this.
 129          *
 130          * Have to create the entire channel manually, as the real channel
 131          * creation code assumes we have PRAMIN access, and we don't until
 132          * we're done here.
 133          */
 134         chan = kzalloc(sizeof(*chan), GFP_KERNEL);
 135         if (!chan)
 136                 return -ENOMEM;
 137         chan->id = 0;
 138         chan->dev = dev;
 139         chan->file_priv = (struct drm_file *)-2;
 140         dev_priv->fifos[0] = dev_priv->fifos[127] = chan;
 141
 142         INIT_LIST_HEAD(&chan->ramht_refs);
 143
 144         /* Channel's PRAMIN object + heap */
 145         ret = nouveau_gpuobj_new_fake(dev, 0, c_offset, c_size, 0,
 146                                                         NULL, &chan->ramin);
 147         if (ret)
 148                 return ret;
 149
 150         if (drm_mm_init(&chan->ramin_heap, c_base, c_size - c_base))
 151                 return -ENOMEM;
 152
 153         /* RAMFC + zero channel's PRAMIN up to start of VM pagedir */
 154         ret = nouveau_gpuobj_new_fake(dev, c_ramfc, c_offset + c_ramfc,
 155                                                 0x4000, 0, NULL, &chan->ramfc);
 156         if (ret)
 157                 return ret;
 158
 159         for (i = 0; i < c_vmpd; i += 4)
 160                 BAR0_WI32(chan->ramin->gpuobj, i, 0);
 161
 162         /* VM page directory */
 163         ret = nouveau_gpuobj_new_fake(dev, c_vmpd, c_offset + c_vmpd,
 164                                            0x4000, 0, &chan->vm_pd, NULL);
 165         if (ret)
 166                 return ret;
 167         for (i = 0; i < 0x4000; i += 8) {
 168                 BAR0_WI32(chan->vm_pd, i + 0x00, 0x00000000);
 169                 BAR0_WI32(chan->vm_pd, i + 0x04, 0x00000000);
 170         }
 171
 172         /* PRAMIN page table, cheat and map into VM at 0x0000000000.
 173          * We map the entire fake channel into the start of the PRAMIN BAR
 174          */
 175         ret = nouveau_gpuobj_new_ref(dev, chan, NULL, 0, pt_size, 0x1000,
 176                                      0, &priv->pramin_pt);
 177         if (ret)
 178                 return ret;
 179
 180         v = c_offset | 1;
 181         if (dev_priv->vram_sys_base) {
 182                 v += dev_priv->vram_sys_base;
 183                 v |= 0x30;
 184         }
 185
 186         i = 0;
 187         while (v < dev_priv->vram_sys_base + c_offset + c_size) {
 188                 BAR0_WI32(priv->pramin_pt->gpuobj, i + 0, lower_32_bits(v));
 189                 BAR0_WI32(priv->pramin_pt->gpuobj, i + 4, upper_32_bits(v));
 190                 v += 0x1000;
 191                 i += 8;
 192         }
 193
 194         while (i < pt_size) {
 195                 BAR0_WI32(priv->pramin_pt->gpuobj, i + 0, 0x00000000);
 196                 BAR0_WI32(priv->pramin_pt->gpuobj, i + 4, 0x00000000);
 197                 i += 8;
 198         }
 199
 200         BAR0_WI32(chan->vm_pd, 0x00, priv->pramin_pt->instance | 0x63);
 201         BAR0_WI32(chan->vm_pd, 0x04, 0x00000000);
 202
 203         /* VRAM page table(s), mapped into VM at +1GiB  */
 204         for (i = 0; i < dev_priv->vm_vram_pt_nr; i++) {
 205                 ret = nouveau_gpuobj_new_ref(dev, chan, NULL, 0,
 206                                              NV50_VM_BLOCK/65536*8, 0, 0,
 207                                              &chan->vm_vram_pt[i]);
 208                 if (ret) {
 209                         NV_ERROR(dev, "Error creating VRAM page tables: %d\n",
 210                                                                         ret);
 211                         dev_priv->vm_vram_pt_nr = i;
 212                         return ret;
 213                 }
 214                 dev_priv->vm_vram_pt[i] = chan->vm_vram_pt[i]->gpuobj;
 215
 216                 for (v = 0; v < dev_priv->vm_vram_pt[i]->im_pramin->size;
 217                                                                 v += 4)
 218                         BAR0_WI32(dev_priv->vm_vram_pt[i], v, 0);
 219
 220                 BAR0_WI32(chan->vm_pd, 0x10 + (i*8),
 221                           chan->vm_vram_pt[i]->instance | 0x61);
 222                 BAR0_WI32(chan->vm_pd, 0x14 + (i*8), 0);
 223         }
 224
 225         /* DMA object for PRAMIN BAR */
 226         ret = nouveau_gpuobj_new_ref(dev, chan, chan, 0, 6*4, 16, 0,
 227                                                         &priv->pramin_bar);
 228         if (ret)
 229                 return ret;
 230         BAR0_WI32(priv->pramin_bar->gpuobj, 0x00, 0x7fc00000);
 231         BAR0_WI32(priv->pramin_bar->gpuobj, 0x04, dev_priv->ramin_size - 1);
 232         BAR0_WI32(priv->pramin_bar->gpuobj, 0x08, 0x00000000);
 233         BAR0_WI32(priv->pramin_bar->gpuobj, 0x0c, 0x00000000);
 234         BAR0_WI32(priv->pramin_bar->gpuobj, 0x10, 0x00000000);
 235         BAR0_WI32(priv->pramin_bar->gpuobj, 0x14, 0x00000000);
 236
 237         /* DMA object for FB BAR */
 238         ret = nouveau_gpuobj_new_ref(dev, chan, chan, 0, 6*4, 16, 0,
 239                                                         &priv->fb_bar);
 240         if (ret)
 241                 return ret;
 242         BAR0_WI32(priv->fb_bar->gpuobj, 0x00, 0x7fc00000);
 243         BAR0_WI32(priv->fb_bar->gpuobj, 0x04, 0x40000000 +
 244                                               pci_resource_len(dev->pdev, 1) - 1);
 245         BAR0_WI32(priv->fb_bar->gpuobj, 0x08, 0x40000000);
 246         BAR0_WI32(priv->fb_bar->gpuobj, 0x0c, 0x00000000);
 247         BAR0_WI32(priv->fb_bar->gpuobj, 0x10, 0x00000000);
 248         BAR0_WI32(priv->fb_bar->gpuobj, 0x14, 0x00000000);
 249
 250         /* Poke the relevant regs, and pray it works :) */
 251         nv_wr32(dev, NV50_PUNK_BAR_CFG_BASE, (chan->ramin->instance >> 12));
 252         nv_wr32(dev, NV50_PUNK_UNK1710, 0);
 253         nv_wr32(dev, NV50_PUNK_BAR_CFG_BASE, (chan->ramin->instance >> 12) |
 254                                          NV50_PUNK_BAR_CFG_BASE_VALID);
 255         nv_wr32(dev, NV50_PUNK_BAR1_CTXDMA, (priv->fb_bar->instance >> 4) |
 256                                         NV50_PUNK_BAR1_CTXDMA_VALID);
 257         nv_wr32(dev, NV50_PUNK_BAR3_CTXDMA, (priv->pramin_bar->instance >> 4) |
 258                                         NV50_PUNK_BAR3_CTXDMA_VALID);
 259
 260         for (i = 0; i < 8; i++)
 261                 nv_wr32(dev, 0x1900 + (i*4), 0);
 262
 263         /* Assume that praying isn't enough, check that we can re-read the
 264          * entire fake channel back from the PRAMIN BAR */
 265         for (i = 0; i < c_size; i += 4) {
 266                 if (nv_rd32(dev, NV_RAMIN + i) != nv_ri32(dev, i)) {
 267                         NV_ERROR(dev, "Error reading back PRAMIN at 0x%08x\n",
 268                                                                         i);
 269                         return -EINVAL;
 270                 }
 271         }
 272
 273         nv_wr32(dev, NV50_PUNK_BAR0_PRAMIN, save_nv001700);
 274
 275         /* Global PRAMIN heap */
 276         if (drm_mm_init(&dev_priv->ramin_heap, c_size, dev_priv->ramin_size - c_size)) {
 277                 NV_ERROR(dev, "Failed to init RAMIN heap\n");
 278         }
 279
 280         /*XXX: incorrect, but needed to make hash func "work" */
 281         dev_priv->ramht_offset = 0x10000;
 282         dev_priv->ramht_bits   = 9;
 283         dev_priv->ramht_size   = (1 << dev_priv->ramht_bits) * 8;
 284         return 0;
 285 }
 286
 287 void
 288 nv50_instmem_takedown(struct drm_device *dev)
 289 {
 290         struct drm_nouveau_private *dev_priv = dev->dev_private;
 291         struct nv50_instmem_priv *priv = dev_priv->engine.instmem.priv;
 292         struct nouveau_channel *chan = dev_priv->fifos[0];
 293         int i;
 294
 295         NV_DEBUG(dev, "\n");
 296
 297         if (!priv)
 298                 return;
 299
 300         /* Restore state from before init */
 301         for (i = 0x1700; i <= 0x1710; i += 4)
 302                 nv_wr32(dev, i, priv->save1700[(i - 0x1700) / 4]);
 303
 304         nouveau_gpuobj_ref_del(dev, &priv->fb_bar);
 305         nouveau_gpuobj_ref_del(dev, &priv->pramin_bar);
 306         nouveau_gpuobj_ref_del(dev, &priv->pramin_pt);
 307
 308         /* Destroy dummy channel */
 309         if (chan) {
 310                 for (i = 0; i < dev_priv->vm_vram_pt_nr; i++) {
 311                         nouveau_gpuobj_ref_del(dev, &chan->vm_vram_pt[i]);
 312                         dev_priv->vm_vram_pt[i] = NULL;
 313                 }
 314                 dev_priv->vm_vram_pt_nr = 0;
 315
 316                 nouveau_gpuobj_del(dev, &chan->vm_pd);
 317                 nouveau_gpuobj_ref_del(dev, &chan->ramfc);
 318                 nouveau_gpuobj_ref_del(dev, &chan->ramin);
 319                 drm_mm_takedown(&chan->ramin_heap);
 320
 321                 dev_priv->fifos[0] = dev_priv->fifos[127] = NULL;
 322                 kfree(chan);
 323         }
 324
 325         dev_priv->engine.instmem.priv = NULL;
 326         kfree(priv);
 327 }
 328
 329 int
 330 nv50_instmem_suspend(struct drm_device *dev)
 331 {
 332         struct drm_nouveau_private *dev_priv = dev->dev_private;
 333         struct nouveau_channel *chan = dev_priv->fifos[0];
 334         struct nouveau_gpuobj *ramin = chan->ramin->gpuobj;
 335         int i;
 336
 337         ramin->im_backing_suspend = vmalloc(ramin->im_pramin->size);
 338         if (!ramin->im_backing_suspend)
 339                 return -ENOMEM;
 340
 341         for (i = 0; i < ramin->im_pramin->size; i += 4)
 342                 ramin->im_backing_suspend[i/4] = nv_ri32(dev, i);
 343         return 0;
 344 }
 345
 346 void
 347 nv50_instmem_resume(struct drm_device *dev)
 348 {
 349         struct drm_nouveau_private *dev_priv = dev->dev_private;
 350         struct nv50_instmem_priv *priv = dev_priv->engine.instmem.priv;
 351         struct nouveau_channel *chan = dev_priv->fifos[0];
 352         struct nouveau_gpuobj *ramin = chan->ramin->gpuobj;
 353         int i;
 354
 355         nv_wr32(dev, NV50_PUNK_BAR0_PRAMIN, (ramin->im_backing_start >> 16));
 356         for (i = 0; i < ramin->im_pramin->size; i += 4)
 357                 BAR0_WI32(ramin, i, ramin->im_backing_suspend[i/4]);
 358         vfree(ramin->im_backing_suspend);
 359         ramin->im_backing_suspend = NULL;
 360
 361         /* Poke the relevant regs, and pray it works :) */
 362         nv_wr32(dev, NV50_PUNK_BAR_CFG_BASE, (chan->ramin->instance >> 12));
 363         nv_wr32(dev, NV50_PUNK_UNK1710, 0);
 364         nv_wr32(dev, NV50_PUNK_BAR_CFG_BASE, (chan->ramin->instance >> 12) |
 365                                          NV50_PUNK_BAR_CFG_BASE_VALID);
 366         nv_wr32(dev, NV50_PUNK_BAR1_CTXDMA, (priv->fb_bar->instance >> 4) |
 367                                         NV50_PUNK_BAR1_CTXDMA_VALID);
 368         nv_wr32(dev, NV50_PUNK_BAR3_CTXDMA, (priv->pramin_bar->instance >> 4) |
 369                                         NV50_PUNK_BAR3_CTXDMA_VALID);
 370
 371         for (i = 0; i < 8; i++)
 372                 nv_wr32(dev, 0x1900 + (i*4), 0);
 373 }
 374
 375 int
 376 nv50_instmem_populate(struct drm_device *dev, struct nouveau_gpuobj *gpuobj,
 377                       uint32_t *sz)
 378 {
 379         int ret;
 380
 381         if (gpuobj->im_backing)
 382                 return -EINVAL;
 383
 384         *sz = ALIGN(*sz, NV50_INSTMEM_PAGE_SIZE);
 385         if (*sz == 0)
 386                 return -EINVAL;
 387
 388         ret = nouveau_bo_new(dev, NULL, *sz, 0, TTM_PL_FLAG_VRAM, 0, 0x0000,
 389                              true, false, &gpuobj->im_backing);
 390         if (ret) {
 391                 NV_ERROR(dev, "error getting PRAMIN backing pages: %d\n", ret);
 392                 return ret;
 393         }
 394
 395         ret = nouveau_bo_pin(gpuobj->im_backing, TTM_PL_FLAG_VRAM);
 396         if (ret) {
 397                 NV_ERROR(dev, "error pinning PRAMIN backing VRAM: %d\n", ret);
 398                 nouveau_bo_ref(NULL, &gpuobj->im_backing);
 399                 return ret;
 400         }
 401
 402         gpuobj->im_backing_start = gpuobj->im_backing->bo.mem.mm_node->start;
 403         gpuobj->im_backing_start <<= PAGE_SHIFT;
 404
 405         return 0;
 406 }
 407
 408 void
 409 nv50_instmem_clear(struct drm_device *dev, struct nouveau_gpuobj *gpuobj)
 410 {
 411         struct drm_nouveau_private *dev_priv = dev->dev_private;
 412
 413         if (gpuobj && gpuobj->im_backing) {
 414                 if (gpuobj->im_bound)
 415                         dev_priv->engine.instmem.unbind(dev, gpuobj);
 416                 nouveau_bo_unpin(gpuobj->im_backing);
 417                 nouveau_bo_ref(NULL, &gpuobj->im_backing);
 418                 gpuobj->im_backing = NULL;
 419         }
 420 }
 421
 422 int
 423 nv50_instmem_bind(struct drm_device *dev, struct nouveau_gpuobj *gpuobj)
 424 {
 425         struct drm_nouveau_private *dev_priv = dev->dev_private;
 426         struct nv50_instmem_priv *priv = dev_priv->engine.instmem.priv;
 427         struct nouveau_gpuobj *pramin_pt = priv->pramin_pt->gpuobj;
 428         uint32_t pte, pte_end;
 429         uint64_t vram;
 430
 431         if (!gpuobj->im_backing || !gpuobj->im_pramin || gpuobj->im_bound)
 432                 return -EINVAL;
 433
 434         NV_DEBUG(dev, "st=0x%lx sz=0x%lx\n",
 435                  gpuobj->im_pramin->start, gpuobj->im_pramin->size);
 436
 437         pte     = (gpuobj->im_pramin->start >> 12) << 1;
 438         pte_end = ((gpuobj->im_pramin->size >> 12) << 1) + pte;
 439         vram    = gpuobj->im_backing_start;
 440
 441         NV_DEBUG(dev, "pramin=0x%lx, pte=%d, pte_end=%d\n",
 442                  gpuobj->im_pramin->start, pte, pte_end);
 443         NV_DEBUG(dev, "first vram page: 0x%08x\n", gpuobj->im_backing_start);
 444
 445         vram |= 1;
 446         if (dev_priv->vram_sys_base) {
 447                 vram += dev_priv->vram_sys_base;
 448                 vram |= 0x30;
 449         }
 450
 451         while (pte < pte_end) {
 452                 nv_wo32(dev, pramin_pt, pte++, lower_32_bits(vram));
 453                 nv_wo32(dev, pramin_pt, pte++, upper_32_bits(vram));
 454                 vram += NV50_INSTMEM_PAGE_SIZE;
 455         }
 456         dev_priv->engine.instmem.flush(dev);
 457
 458         nv50_vm_flush(dev, 4);
 459         nv50_vm_flush(dev, 6);
 460
 461         gpuobj->im_bound = 1;
 462         return 0;
 463 }
 464
 465 int
 466 nv50_instmem_unbind(struct drm_device *dev, struct nouveau_gpuobj *gpuobj)
 467 {
 468         struct drm_nouveau_private *dev_priv = dev->dev_private;
 469         struct nv50_instmem_priv *priv = dev_priv->engine.instmem.priv;
 470         uint32_t pte, pte_end;
 471
 472         if (gpuobj->im_bound == 0)
 473                 return -EINVAL;
 474
 475         pte     = (gpuobj->im_pramin->start >> 12) << 1;
 476         pte_end = ((gpuobj->im_pramin->size >> 12) << 1) + pte;
 477
 478         while (pte < pte_end) {
 479                 nv_wo32(dev, priv->pramin_pt->gpuobj, pte++, 0x00000000);
 480                 nv_wo32(dev, priv->pramin_pt->gpuobj, pte++, 0x00000000);
 481         }
 482         dev_priv->engine.instmem.flush(dev);
 483
 484         gpuobj->im_bound = 0;
 485         return 0;
 486 }
 487
 488 void
 489 nv50_instmem_flush(struct drm_device *dev)
 490 {
 491         nv_wr32(dev, 0x00330c, 0x00000001);
 492         if (!nv_wait(0x00330c, 0x00000002, 0x00000000))
 493                 NV_ERROR(dev, "PRAMIN flush timeout\n");
 494 }
 495
 496 void
 497 nv84_instmem_flush(struct drm_device *dev)
 498 {
 499         nv_wr32(dev, 0x070000, 0x00000001);
 500         if (!nv_wait(0x070000, 0x00000002, 0x00000000))
 501                 NV_ERROR(dev, "PRAMIN flush timeout\n");
 502 }
 503
 504 void
 505 nv50_vm_flush(struct drm_device *dev, int engine)
 506 {
 507         nv_wr32(dev, 0x100c80, (engine << 16) | 1);
 508         if (!nv_wait(0x100c80, 0x00000001, 0x00000000))
 509                 NV_ERROR(dev, "vm flush timeout: engine %d\n", engine);
 510 }
 511