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drm/nv50-: map TTM_PL_SYSTEM through a BAR for CPU access

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Moves bo's to TTM_PL_TT for BAR mapping, to hide tiling from user.

Signed-off-by: Maarten Lankhorst <maarten.lankhorst@canonical.com>
Signed-off-by: Ben Skeggs <bskeggs@redhat.com>
This commit is contained in:
Maarten Lankhorst 2013-11-12 13:34:09 +01:00 committed by Ben Skeggs
parent ce8f7699f2
commit a554090664
1 changed files with 17 additions and 3 deletions
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20
drivers/gpu/drm/nouveau/nouveau_bo.c
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@ -1241,6 +1241,7 @@ nouveau_ttm_io_mem_reserve(struct ttm_bo_device *bdev, struct ttm_mem_reg *mem)
{
struct ttm_mem_type_manager *man = &bdev->man[mem->mem_type];
struct nouveau_drm *drm = nouveau_bdev(bdev);
struct nouveau_mem *node = mem->mm_node;
struct drm_device *dev = drm->dev;
int ret;
@ -1263,14 +1264,16 @@ nouveau_ttm_io_mem_reserve(struct ttm_bo_device *bdev, struct ttm_mem_reg *mem)
mem->bus.is_iomem = !dev->agp->cant_use_aperture;
}
#endif
break;
if (!node->memtype)
/* untiled */
break;
/* fallthrough, tiled memory */
case TTM_PL_VRAM:
mem->bus.offset = mem->start << PAGE_SHIFT;
mem->bus.base = pci_resource_start(dev->pdev, 1);
mem->bus.is_iomem = true;
if (nv_device(drm->device)->card_type >= NV_50) {
struct nouveau_bar *bar = nouveau_bar(drm->device);
struct nouveau_mem *node = mem->mm_node;
ret = bar->umap(bar, node, NV_MEM_ACCESS_RW,
&node->bar_vma);
@ -1306,6 +1309,7 @@ nouveau_ttm_fault_reserve_notify(struct ttm_buffer_object *bo)
struct nouveau_bo *nvbo = nouveau_bo(bo);
struct nouveau_device *device = nv_device(drm->device);
u32 mappable = pci_resource_len(device->pdev, 1) >> PAGE_SHIFT;
int ret;
/* as long as the bo isn't in vram, and isn't tiled, we've got
* nothing to do here.
@ -1314,10 +1318,20 @@ nouveau_ttm_fault_reserve_notify(struct ttm_buffer_object *bo)
if (nv_device(drm->device)->card_type < NV_50 ||
!nouveau_bo_tile_layout(nvbo))
return 0;
if (bo->mem.mem_type == TTM_PL_SYSTEM) {
nouveau_bo_placement_set(nvbo, TTM_PL_TT, 0);
ret = nouveau_bo_validate(nvbo, false, false);
if (ret)
return ret;
}
return 0;
}
/* make sure bo is in mappable vram */
if (bo->mem.start + bo->mem.num_pages < mappable)
if (nv_device(drm->device)->card_type >= NV_50 ||
bo->mem.start + bo->mem.num_pages < mappable)
return 0;