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gpu: nvgpu: detect iommu'ability dynamically

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A device can be iommu'able whenever it's registered so that this patch
detects its iommu'ability dynamically.

Bug 1577389

Change-Id: I8ea20e5dd997fc1a399f517c17783323f238ecc3
Signed-off-by: Hiroshi Doyu <hdoyu@nvidia.com>
Reviewed-on: http://git-master/r/606019
Reviewed-by: Terje Bergstrom <tbergstrom@nvidia.com>
This commit is contained in:
Hiroshi Doyu
2014-11-19 08:43:08 +02:00
committed by Dan Willemsen
parent 8af8c35741
commit 75af9eb590
1 changed files with 9 additions and 7 deletions
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16
drivers/gpu/nvgpu/gk20a/mm_gk20a.c
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@@ -1664,14 +1664,16 @@ u64 gk20a_mm_smmu_vaddr_translate(struct gk20a *g, dma_addr_t iova)
u64 gk20a_mm_iova_addr(struct gk20a *g, struct scatterlist *sgl)
{
u64 result = sg_phys(sgl);
#ifdef CONFIG_TEGRA_IOMMU_SMMU
if (!device_is_iommuable(dev_from_gk20a(g)))
return sg_phys(sgl);
if (sg_dma_address(sgl) == 0)
return sg_phys(sgl);
if (sg_dma_address(sgl) == DMA_ERROR_CODE)
result = 0;
else if (sg_dma_address(sgl))
result = gk20a_mm_smmu_vaddr_translate(g, sg_dma_address(sgl));
#endif
return result;
return 0;
return gk20a_mm_smmu_vaddr_translate(g, sg_dma_address(sgl));
}
static int update_gmmu_ptes_locked(struct vm_gk20a *vm,