diff options
| author | Alexandre Courbot <acourbot@nvidia.com> | 2015-09-04 19:59:34 +0900 |
|---|---|---|
| committer | Ben Skeggs <bskeggs@redhat.com> | 2015-10-12 13:08:19 +1000 |
| commit | 9e1fb7cf0090a2fd311377f0a6e9d6ad42c2e85a (patch) | |
| tree | 8408bcce0f6c39760bcc9fa0d4016380bbc1e0bf | |
| parent | 2ccdf94b27d28cbbfc5c6c9e6dbe220166df6d9d (diff) | |
| download | nouveau-9e1fb7cf0090a2fd311377f0a6e9d6ad42c2e85a.tar.gz | |
ttm: set the DMA mask for platform devices
So far the DMA mask was not set for platform devices, which limited them
to a 32-bit physical space. Allow dma_set_mask() to be called for
non-PCI devices, and also take the IOMMU bit into account since it could
restrict the physically addressable space.
Signed-off-by: Alexandre Courbot <acourbot@nvidia.com>
Signed-off-by: Ben Skeggs <bskeggs@redhat.com>
| -rw-r--r-- | drm/nouveau/nouveau_ttm.c | 25 |
1 files changed, 19 insertions, 6 deletions
diff --git a/drm/nouveau/nouveau_ttm.c b/drm/nouveau/nouveau_ttm.c index bd287c272..3f713c1b5 100644 --- a/drm/nouveau/nouveau_ttm.c +++ b/drm/nouveau/nouveau_ttm.c @@ -29,6 +29,9 @@ #include "nouveau_gem.h" #include "drm_legacy.h" + +#include <core/tegra.h> + static int nouveau_vram_manager_init(struct ttm_mem_type_manager *man, unsigned long psize) { @@ -353,16 +356,26 @@ nouveau_ttm_init(struct nouveau_drm *drm) if (drm->agp.bridge || !dma_supported(dev->dev, DMA_BIT_MASK(bits))) bits = 32; + } else if (device->func->tegra) { + struct nvkm_device_tegra *tegra = device->func->tegra(device); - ret = dma_set_mask(dev->dev, DMA_BIT_MASK(bits)); - if (ret) - return ret; + /* + * If the platform can use a IOMMU, then the addressable DMA + * space is constrained by the IOMMU bit + */ + if (tegra->func->iommu_bit) + bits = min(bits, tegra->func->iommu_bit); - ret = dma_set_coherent_mask(dev->dev, DMA_BIT_MASK(bits)); - if (ret) - dma_set_coherent_mask(dev->dev, DMA_BIT_MASK(32)); } + ret = dma_set_mask(dev->dev, DMA_BIT_MASK(bits)); + if (ret) + return ret; + + ret = dma_set_coherent_mask(dev->dev, DMA_BIT_MASK(bits)); + if (ret) + dma_set_coherent_mask(dev->dev, DMA_BIT_MASK(32)); + ret = nouveau_ttm_global_init(drm); if (ret) return ret; |