134fedbb7669cebd1e7cec8129e20110e8271128
[linux-2.6.git] / drivers / gpu / drm / nouveau / nouveau_mem.c
1 /*
2  * Copyright (C) The Weather Channel, Inc.  2002.  All Rights Reserved.
3  * Copyright 2005 Stephane Marchesin
4  *
5  * The Weather Channel (TM) funded Tungsten Graphics to develop the
6  * initial release of the Radeon 8500 driver under the XFree86 license.
7  * This notice must be preserved.
8  *
9  * Permission is hereby granted, free of charge, to any person obtaining a
10  * copy of this software and associated documentation files (the "Software"),
11  * to deal in the Software without restriction, including without limitation
12  * the rights to use, copy, modify, merge, publish, distribute, sublicense,
13  * and/or sell copies of the Software, and to permit persons to whom the
14  * Software is furnished to do so, subject to the following conditions:
15  *
16  * The above copyright notice and this permission notice (including the next
17  * paragraph) shall be included in all copies or substantial portions of the
18  * Software.
19  *
20  * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
21  * IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
22  * FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT.  IN NO EVENT SHALL
23  * THE AUTHORS AND/OR THEIR SUPPLIERS BE LIABLE FOR ANY CLAIM, DAMAGES OR
24  * OTHER LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE,
25  * ARISING FROM, OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER
26  * DEALINGS IN THE SOFTWARE.
27  *
28  * Authors:
29  *    Keith Whitwell <keith@tungstengraphics.com>
30  */
31
32
33 #include "drmP.h"
34 #include "drm.h"
35 #include "drm_sarea.h"
36 #include "nouveau_drv.h"
37
38 static struct mem_block *
39 split_block(struct mem_block *p, uint64_t start, uint64_t size,
40             struct drm_file *file_priv)
41 {
42         /* Maybe cut off the start of an existing block */
43         if (start > p->start) {
44                 struct mem_block *newblock =
45                         kmalloc(sizeof(*newblock), GFP_KERNEL);
46                 if (!newblock)
47                         goto out;
48                 newblock->start = start;
49                 newblock->size = p->size - (start - p->start);
50                 newblock->file_priv = NULL;
51                 newblock->next = p->next;
52                 newblock->prev = p;
53                 p->next->prev = newblock;
54                 p->next = newblock;
55                 p->size -= newblock->size;
56                 p = newblock;
57         }
58
59         /* Maybe cut off the end of an existing block */
60         if (size < p->size) {
61                 struct mem_block *newblock =
62                         kmalloc(sizeof(*newblock), GFP_KERNEL);
63                 if (!newblock)
64                         goto out;
65                 newblock->start = start + size;
66                 newblock->size = p->size - size;
67                 newblock->file_priv = NULL;
68                 newblock->next = p->next;
69                 newblock->prev = p;
70                 p->next->prev = newblock;
71                 p->next = newblock;
72                 p->size = size;
73         }
74
75 out:
76         /* Our block is in the middle */
77         p->file_priv = file_priv;
78         return p;
79 }
80
81 struct mem_block *
82 nouveau_mem_alloc_block(struct mem_block *heap, uint64_t size,
83                         int align2, struct drm_file *file_priv, int tail)
84 {
85         struct mem_block *p;
86         uint64_t mask = (1 << align2) - 1;
87
88         if (!heap)
89                 return NULL;
90
91         if (tail) {
92                 list_for_each_prev(p, heap) {
93                         uint64_t start = ((p->start + p->size) - size) & ~mask;
94
95                         if (p->file_priv == NULL && start >= p->start &&
96                             start + size <= p->start + p->size)
97                                 return split_block(p, start, size, file_priv);
98                 }
99         } else {
100                 list_for_each(p, heap) {
101                         uint64_t start = (p->start + mask) & ~mask;
102
103                         if (p->file_priv == NULL &&
104                             start + size <= p->start + p->size)
105                                 return split_block(p, start, size, file_priv);
106                 }
107         }
108
109         return NULL;
110 }
111
112 void nouveau_mem_free_block(struct mem_block *p)
113 {
114         p->file_priv = NULL;
115
116         /* Assumes a single contiguous range.  Needs a special file_priv in
117          * 'heap' to stop it being subsumed.
118          */
119         if (p->next->file_priv == NULL) {
120                 struct mem_block *q = p->next;
121                 p->size += q->size;
122                 p->next = q->next;
123                 p->next->prev = p;
124                 kfree(q);
125         }
126
127         if (p->prev->file_priv == NULL) {
128                 struct mem_block *q = p->prev;
129                 q->size += p->size;
130                 q->next = p->next;
131                 q->next->prev = q;
132                 kfree(p);
133         }
134 }
135
136 /* Initialize.  How to check for an uninitialized heap?
137  */
138 int nouveau_mem_init_heap(struct mem_block **heap, uint64_t start,
139                           uint64_t size)
140 {
141         struct mem_block *blocks = kmalloc(sizeof(*blocks), GFP_KERNEL);
142
143         if (!blocks)
144                 return -ENOMEM;
145
146         *heap = kmalloc(sizeof(**heap), GFP_KERNEL);
147         if (!*heap) {
148                 kfree(blocks);
149                 return -ENOMEM;
150         }
151
152         blocks->start = start;
153         blocks->size = size;
154         blocks->file_priv = NULL;
155         blocks->next = blocks->prev = *heap;
156
157         memset(*heap, 0, sizeof(**heap));
158         (*heap)->file_priv = (struct drm_file *) -1;
159         (*heap)->next = (*heap)->prev = blocks;
160         return 0;
161 }
162
163 /*
164  * Free all blocks associated with the releasing file_priv
165  */
166 void nouveau_mem_release(struct drm_file *file_priv, struct mem_block *heap)
167 {
168         struct mem_block *p;
169
170         if (!heap || !heap->next)
171                 return;
172
173         list_for_each(p, heap) {
174                 if (p->file_priv == file_priv)
175                         p->file_priv = NULL;
176         }
177
178         /* Assumes a single contiguous range.  Needs a special file_priv in
179          * 'heap' to stop it being subsumed.
180          */
181         list_for_each(p, heap) {
182                 while ((p->file_priv == NULL) &&
183                                         (p->next->file_priv == NULL) &&
184                                         (p->next != heap)) {
185                         struct mem_block *q = p->next;
186                         p->size += q->size;
187                         p->next = q->next;
188                         p->next->prev = p;
189                         kfree(q);
190                 }
191         }
192 }
193
194 /*
195  * NV10-NV40 tiling helpers
196  */
197
198 static void
199 nv10_mem_set_region_tiling(struct drm_device *dev, int i, uint32_t addr,
200                            uint32_t size, uint32_t pitch)
201 {
202         struct drm_nouveau_private *dev_priv = dev->dev_private;
203         struct nouveau_fifo_engine *pfifo = &dev_priv->engine.fifo;
204         struct nouveau_fb_engine *pfb = &dev_priv->engine.fb;
205         struct nouveau_pgraph_engine *pgraph = &dev_priv->engine.graph;
206         struct nouveau_tile_reg *tile = &dev_priv->tile.reg[i];
207
208         tile->addr = addr;
209         tile->size = size;
210         tile->used = !!pitch;
211         nouveau_fence_unref((void **)&tile->fence);
212
213         if (!pfifo->cache_flush(dev))
214                 return;
215
216         pfifo->reassign(dev, false);
217         pfifo->cache_flush(dev);
218         pfifo->cache_pull(dev, false);
219
220         nouveau_wait_for_idle(dev);
221
222         pgraph->set_region_tiling(dev, i, addr, size, pitch);
223         pfb->set_region_tiling(dev, i, addr, size, pitch);
224
225         pfifo->cache_pull(dev, true);
226         pfifo->reassign(dev, true);
227 }
228
229 struct nouveau_tile_reg *
230 nv10_mem_set_tiling(struct drm_device *dev, uint32_t addr, uint32_t size,
231                     uint32_t pitch)
232 {
233         struct drm_nouveau_private *dev_priv = dev->dev_private;
234         struct nouveau_fb_engine *pfb = &dev_priv->engine.fb;
235         struct nouveau_tile_reg *tile = dev_priv->tile.reg, *found = NULL;
236         int i;
237
238         spin_lock(&dev_priv->tile.lock);
239
240         for (i = 0; i < pfb->num_tiles; i++) {
241                 if (tile[i].used)
242                         /* Tile region in use. */
243                         continue;
244
245                 if (tile[i].fence &&
246                     !nouveau_fence_signalled(tile[i].fence, NULL))
247                         /* Pending tile region. */
248                         continue;
249
250                 if (max(tile[i].addr, addr) <
251                     min(tile[i].addr + tile[i].size, addr + size))
252                         /* Kill an intersecting tile region. */
253                         nv10_mem_set_region_tiling(dev, i, 0, 0, 0);
254
255                 if (pitch && !found) {
256                         /* Free tile region. */
257                         nv10_mem_set_region_tiling(dev, i, addr, size, pitch);
258                         found = &tile[i];
259                 }
260         }
261
262         spin_unlock(&dev_priv->tile.lock);
263
264         return found;
265 }
266
267 void
268 nv10_mem_expire_tiling(struct drm_device *dev, struct nouveau_tile_reg *tile,
269                        struct nouveau_fence *fence)
270 {
271         if (fence) {
272                 /* Mark it as pending. */
273                 tile->fence = fence;
274                 nouveau_fence_ref(fence);
275         }
276
277         tile->used = false;
278 }
279
280 /*
281  * NV50 VM helpers
282  */
283 int
284 nv50_mem_vm_bind_linear(struct drm_device *dev, uint64_t virt, uint32_t size,
285                         uint32_t flags, uint64_t phys)
286 {
287         struct drm_nouveau_private *dev_priv = dev->dev_private;
288         struct nouveau_gpuobj *pgt;
289         unsigned block;
290         int i;
291
292         virt = ((virt - dev_priv->vm_vram_base) >> 16) << 1;
293         size = (size >> 16) << 1;
294         phys |= ((uint64_t)flags << 32) | 1;
295
296         dev_priv->engine.instmem.prepare_access(dev, true);
297         while (size) {
298                 unsigned offset_h = upper_32_bits(phys);
299                 unsigned offset_l = lower_32_bits(phys);
300                 unsigned pte, end;
301
302                 for (i = 7; i >= 0; i--) {
303                         block = 1 << (i + 1);
304                         if (size >= block && !(virt & (block - 1)))
305                                 break;
306                 }
307                 offset_l |= (i << 7);
308
309                 phys += block << 15;
310                 size -= block;
311
312                 while (block) {
313                         pgt = dev_priv->vm_vram_pt[virt >> 14];
314                         pte = virt & 0x3ffe;
315
316                         end = pte + block;
317                         if (end > 16384)
318                                 end = 16384;
319                         block -= (end - pte);
320                         virt  += (end - pte);
321
322                         while (pte < end) {
323                                 nv_wo32(dev, pgt, pte++, offset_l);
324                                 nv_wo32(dev, pgt, pte++, offset_h);
325                         }
326                 }
327         }
328         dev_priv->engine.instmem.finish_access(dev);
329
330         nv_wr32(dev, 0x100c80, 0x00050001);
331         if (!nv_wait(0x100c80, 0x00000001, 0x00000000)) {
332                 NV_ERROR(dev, "timeout: (0x100c80 & 1) == 0 (2)\n");
333                 NV_ERROR(dev, "0x100c80 = 0x%08x\n", nv_rd32(dev, 0x100c80));
334                 return -EBUSY;
335         }
336
337         nv_wr32(dev, 0x100c80, 0x00000001);
338         if (!nv_wait(0x100c80, 0x00000001, 0x00000000)) {
339                 NV_ERROR(dev, "timeout: (0x100c80 & 1) == 0 (2)\n");
340                 NV_ERROR(dev, "0x100c80 = 0x%08x\n", nv_rd32(dev, 0x100c80));
341                 return -EBUSY;
342         }
343
344         return 0;
345 }
346
347 void
348 nv50_mem_vm_unbind(struct drm_device *dev, uint64_t virt, uint32_t size)
349 {
350         struct drm_nouveau_private *dev_priv = dev->dev_private;
351         struct nouveau_gpuobj *pgt;
352         unsigned pages, pte, end;
353
354         virt -= dev_priv->vm_vram_base;
355         pages = (size >> 16) << 1;
356
357         dev_priv->engine.instmem.prepare_access(dev, true);
358         while (pages) {
359                 pgt = dev_priv->vm_vram_pt[virt >> 29];
360                 pte = (virt & 0x1ffe0000ULL) >> 15;
361
362                 end = pte + pages;
363                 if (end > 16384)
364                         end = 16384;
365                 pages -= (end - pte);
366                 virt  += (end - pte) << 15;
367
368                 while (pte < end)
369                         nv_wo32(dev, pgt, pte++, 0);
370         }
371         dev_priv->engine.instmem.finish_access(dev);
372
373         nv_wr32(dev, 0x100c80, 0x00050001);
374         if (!nv_wait(0x100c80, 0x00000001, 0x00000000)) {
375                 NV_ERROR(dev, "timeout: (0x100c80 & 1) == 0 (2)\n");
376                 NV_ERROR(dev, "0x100c80 = 0x%08x\n", nv_rd32(dev, 0x100c80));
377                 return;
378         }
379
380         nv_wr32(dev, 0x100c80, 0x00000001);
381         if (!nv_wait(0x100c80, 0x00000001, 0x00000000)) {
382                 NV_ERROR(dev, "timeout: (0x100c80 & 1) == 0 (2)\n");
383                 NV_ERROR(dev, "0x100c80 = 0x%08x\n", nv_rd32(dev, 0x100c80));
384         }
385 }
386
387 /*
388  * Cleanup everything
389  */
390 void nouveau_mem_takedown(struct mem_block **heap)
391 {
392         struct mem_block *p;
393
394         if (!*heap)
395                 return;
396
397         for (p = (*heap)->next; p != *heap;) {
398                 struct mem_block *q = p;
399                 p = p->next;
400                 kfree(q);
401         }
402
403         kfree(*heap);
404         *heap = NULL;
405 }
406
407 void nouveau_mem_close(struct drm_device *dev)
408 {
409         struct drm_nouveau_private *dev_priv = dev->dev_private;
410
411         nouveau_bo_unpin(dev_priv->vga_ram);
412         nouveau_bo_ref(NULL, &dev_priv->vga_ram);
413
414         ttm_bo_device_release(&dev_priv->ttm.bdev);
415
416         nouveau_ttm_global_release(dev_priv);
417
418         if (drm_core_has_AGP(dev) && dev->agp &&
419             drm_core_check_feature(dev, DRIVER_MODESET)) {
420                 struct drm_agp_mem *entry, *tempe;
421
422                 /* Remove AGP resources, but leave dev->agp
423                    intact until drv_cleanup is called. */
424                 list_for_each_entry_safe(entry, tempe, &dev->agp->memory, head) {
425                         if (entry->bound)
426                                 drm_unbind_agp(entry->memory);
427                         drm_free_agp(entry->memory, entry->pages);
428                         kfree(entry);
429                 }
430                 INIT_LIST_HEAD(&dev->agp->memory);
431
432                 if (dev->agp->acquired)
433                         drm_agp_release(dev);
434
435                 dev->agp->acquired = 0;
436                 dev->agp->enabled = 0;
437         }
438
439         if (dev_priv->fb_mtrr) {
440                 drm_mtrr_del(dev_priv->fb_mtrr, drm_get_resource_start(dev, 1),
441                              drm_get_resource_len(dev, 1), DRM_MTRR_WC);
442                 dev_priv->fb_mtrr = 0;
443         }
444 }
445
446 /*XXX won't work on BSD because of pci_read_config_dword */
447 static uint32_t
448 nouveau_mem_fb_amount_igp(struct drm_device *dev)
449 {
450         struct drm_nouveau_private *dev_priv = dev->dev_private;
451         struct pci_dev *bridge;
452         uint32_t mem;
453
454         bridge = pci_get_bus_and_slot(0, PCI_DEVFN(0, 1));
455         if (!bridge) {
456                 NV_ERROR(dev, "no bridge device\n");
457                 return 0;
458         }
459
460         if (dev_priv->flags&NV_NFORCE) {
461                 pci_read_config_dword(bridge, 0x7C, &mem);
462                 return (uint64_t)(((mem >> 6) & 31) + 1)*1024*1024;
463         } else
464         if (dev_priv->flags&NV_NFORCE2) {
465                 pci_read_config_dword(bridge, 0x84, &mem);
466                 return (uint64_t)(((mem >> 4) & 127) + 1)*1024*1024;
467         }
468
469         NV_ERROR(dev, "impossible!\n");
470         return 0;
471 }
472
473 /* returns the amount of FB ram in bytes */
474 uint64_t nouveau_mem_fb_amount(struct drm_device *dev)
475 {
476         struct drm_nouveau_private *dev_priv = dev->dev_private;
477         uint32_t boot0;
478
479         switch (dev_priv->card_type) {
480         case NV_04:
481                 boot0 = nv_rd32(dev, NV03_BOOT_0);
482                 if (boot0 & 0x00000100)
483                         return (((boot0 >> 12) & 0xf) * 2 + 2) * 1024 * 1024;
484
485                 switch (boot0 & NV03_BOOT_0_RAM_AMOUNT) {
486                 case NV04_BOOT_0_RAM_AMOUNT_32MB:
487                         return 32 * 1024 * 1024;
488                 case NV04_BOOT_0_RAM_AMOUNT_16MB:
489                         return 16 * 1024 * 1024;
490                 case NV04_BOOT_0_RAM_AMOUNT_8MB:
491                         return 8 * 1024 * 1024;
492                 case NV04_BOOT_0_RAM_AMOUNT_4MB:
493                         return 4 * 1024 * 1024;
494                 }
495                 break;
496         case NV_10:
497         case NV_20:
498         case NV_30:
499         case NV_40:
500         case NV_50:
501         default:
502                 if (dev_priv->flags & (NV_NFORCE | NV_NFORCE2)) {
503                         return nouveau_mem_fb_amount_igp(dev);
504                 } else {
505                         uint64_t mem;
506                         mem = (nv_rd32(dev, NV04_FIFO_DATA) &
507                                         NV10_FIFO_DATA_RAM_AMOUNT_MB_MASK) >>
508                                         NV10_FIFO_DATA_RAM_AMOUNT_MB_SHIFT;
509                         return mem * 1024 * 1024;
510                 }
511                 break;
512         }
513
514         NV_ERROR(dev,
515                 "Unable to detect video ram size. Please report your setup to "
516                                                         DRIVER_EMAIL "\n");
517         return 0;
518 }
519
520 #if __OS_HAS_AGP
521 static void nouveau_mem_reset_agp(struct drm_device *dev)
522 {
523         uint32_t saved_pci_nv_1, saved_pci_nv_19, pmc_enable;
524
525         saved_pci_nv_1 = nv_rd32(dev, NV04_PBUS_PCI_NV_1);
526         saved_pci_nv_19 = nv_rd32(dev, NV04_PBUS_PCI_NV_19);
527
528         /* clear busmaster bit */
529         nv_wr32(dev, NV04_PBUS_PCI_NV_1, saved_pci_nv_1 & ~0x4);
530         /* clear SBA and AGP bits */
531         nv_wr32(dev, NV04_PBUS_PCI_NV_19, saved_pci_nv_19 & 0xfffff0ff);
532
533         /* power cycle pgraph, if enabled */
534         pmc_enable = nv_rd32(dev, NV03_PMC_ENABLE);
535         if (pmc_enable & NV_PMC_ENABLE_PGRAPH) {
536                 nv_wr32(dev, NV03_PMC_ENABLE,
537                                 pmc_enable & ~NV_PMC_ENABLE_PGRAPH);
538                 nv_wr32(dev, NV03_PMC_ENABLE, nv_rd32(dev, NV03_PMC_ENABLE) |
539                                 NV_PMC_ENABLE_PGRAPH);
540         }
541
542         /* and restore (gives effect of resetting AGP) */
543         nv_wr32(dev, NV04_PBUS_PCI_NV_19, saved_pci_nv_19);
544         nv_wr32(dev, NV04_PBUS_PCI_NV_1, saved_pci_nv_1);
545 }
546 #endif
547
548 int
549 nouveau_mem_init_agp(struct drm_device *dev)
550 {
551 #if __OS_HAS_AGP
552         struct drm_nouveau_private *dev_priv = dev->dev_private;
553         struct drm_agp_info info;
554         struct drm_agp_mode mode;
555         int ret;
556
557         if (nouveau_noagp)
558                 return 0;
559
560         nouveau_mem_reset_agp(dev);
561
562         if (!dev->agp->acquired) {
563                 ret = drm_agp_acquire(dev);
564                 if (ret) {
565                         NV_ERROR(dev, "Unable to acquire AGP: %d\n", ret);
566                         return ret;
567                 }
568         }
569
570         ret = drm_agp_info(dev, &info);
571         if (ret) {
572                 NV_ERROR(dev, "Unable to get AGP info: %d\n", ret);
573                 return ret;
574         }
575
576         /* see agp.h for the AGPSTAT_* modes available */
577         mode.mode = info.mode;
578         ret = drm_agp_enable(dev, mode);
579         if (ret) {
580                 NV_ERROR(dev, "Unable to enable AGP: %d\n", ret);
581                 return ret;
582         }
583
584         dev_priv->gart_info.type        = NOUVEAU_GART_AGP;
585         dev_priv->gart_info.aper_base   = info.aperture_base;
586         dev_priv->gart_info.aper_size   = info.aperture_size;
587 #endif
588         return 0;
589 }
590
591 int
592 nouveau_mem_init(struct drm_device *dev)
593 {
594         struct drm_nouveau_private *dev_priv = dev->dev_private;
595         struct ttm_bo_device *bdev = &dev_priv->ttm.bdev;
596         int ret, dma_bits = 32;
597
598         dev_priv->fb_phys = drm_get_resource_start(dev, 1);
599         dev_priv->gart_info.type = NOUVEAU_GART_NONE;
600
601         if (dev_priv->card_type >= NV_50 &&
602             pci_dma_supported(dev->pdev, DMA_BIT_MASK(40)))
603                 dma_bits = 40;
604
605         ret = pci_set_dma_mask(dev->pdev, DMA_BIT_MASK(dma_bits));
606         if (ret) {
607                 NV_ERROR(dev, "Error setting DMA mask: %d\n", ret);
608                 return ret;
609         }
610
611         ret = nouveau_ttm_global_init(dev_priv);
612         if (ret)
613                 return ret;
614
615         ret = ttm_bo_device_init(&dev_priv->ttm.bdev,
616                                  dev_priv->ttm.bo_global_ref.ref.object,
617                                  &nouveau_bo_driver, DRM_FILE_PAGE_OFFSET,
618                                  dma_bits <= 32 ? true : false);
619         if (ret) {
620                 NV_ERROR(dev, "Error initialising bo driver: %d\n", ret);
621                 return ret;
622         }
623
624         INIT_LIST_HEAD(&dev_priv->ttm.bo_list);
625         spin_lock_init(&dev_priv->ttm.bo_list_lock);
626         spin_lock_init(&dev_priv->tile.lock);
627
628         dev_priv->fb_available_size = nouveau_mem_fb_amount(dev);
629
630         dev_priv->fb_mappable_pages = dev_priv->fb_available_size;
631         if (dev_priv->fb_mappable_pages > drm_get_resource_len(dev, 1))
632                 dev_priv->fb_mappable_pages = drm_get_resource_len(dev, 1);
633         dev_priv->fb_mappable_pages >>= PAGE_SHIFT;
634
635         NV_INFO(dev, "%d MiB VRAM\n", (int)(dev_priv->fb_available_size >> 20));
636
637         /* remove reserved space at end of vram from available amount */
638         dev_priv->fb_available_size -= dev_priv->ramin_rsvd_vram;
639         dev_priv->fb_aper_free = dev_priv->fb_available_size;
640
641         /* mappable vram */
642         ret = ttm_bo_init_mm(bdev, TTM_PL_VRAM,
643                              dev_priv->fb_available_size >> PAGE_SHIFT);
644         if (ret) {
645                 NV_ERROR(dev, "Failed VRAM mm init: %d\n", ret);
646                 return ret;
647         }
648
649         ret = nouveau_bo_new(dev, NULL, 256*1024, 0, TTM_PL_FLAG_VRAM,
650                              0, 0, true, true, &dev_priv->vga_ram);
651         if (ret == 0)
652                 ret = nouveau_bo_pin(dev_priv->vga_ram, TTM_PL_FLAG_VRAM);
653         if (ret) {
654                 NV_WARN(dev, "failed to reserve VGA memory\n");
655                 nouveau_bo_ref(NULL, &dev_priv->vga_ram);
656         }
657
658         /* GART */
659 #if !defined(__powerpc__) && !defined(__ia64__)
660         if (drm_device_is_agp(dev) && dev->agp) {
661                 ret = nouveau_mem_init_agp(dev);
662                 if (ret)
663                         NV_ERROR(dev, "Error initialising AGP: %d\n", ret);
664         }
665 #endif
666
667         if (dev_priv->gart_info.type == NOUVEAU_GART_NONE) {
668                 ret = nouveau_sgdma_init(dev);
669                 if (ret) {
670                         NV_ERROR(dev, "Error initialising PCI(E): %d\n", ret);
671                         return ret;
672                 }
673         }
674
675         NV_INFO(dev, "%d MiB GART (aperture)\n",
676                 (int)(dev_priv->gart_info.aper_size >> 20));
677         dev_priv->gart_info.aper_free = dev_priv->gart_info.aper_size;
678
679         ret = ttm_bo_init_mm(bdev, TTM_PL_TT,
680                              dev_priv->gart_info.aper_size >> PAGE_SHIFT);
681         if (ret) {
682                 NV_ERROR(dev, "Failed TT mm init: %d\n", ret);
683                 return ret;
684         }
685
686         dev_priv->fb_mtrr = drm_mtrr_add(drm_get_resource_start(dev, 1),
687                                          drm_get_resource_len(dev, 1),
688                                          DRM_MTRR_WC);
689
690         return 0;
691 }
692
693