diff options
| author | Hiroshi Doyu <hdoyu@nvidia.com> | 2013-09-11 14:43:59 +0300 |
|---|---|---|
| committer | Dan Willemsen <dwillemsen@nvidia.com> | 2013-09-16 17:42:20 -0700 |
| commit | 01650df9eec73d65750ab9074eb26f0a7f2a195e (patch) | |
| tree | 54e1915513ca625c8f7ee94d48bd2556b129034c /drivers/iommu | |
| parent | f46788a6f7d9d3999fdb0f7a2da63d19f3281907 (diff) | |
iommu/tegra: smmu: Remove page validataion
This page is returned from alloc_ptbl() and it's ensured that page is
valid at this point. This code is inside of loop for map_sg/map_pages
so that this affects the perf.
Bug 1290869
Change-Id: I2b2165851a320496d650d6335127168f02882bed
Signed-off-by: Hiroshi Doyu <hdoyu@nvidia.com>
Reviewed-on: http://git-master/r/273151
Reviewed-by: Krishna Reddy <vdumpa@nvidia.com>
Diffstat (limited to 'drivers/iommu')
| -rw-r--r-- | drivers/iommu/tegra-smmu.c | 10 |
1 files changed, 2 insertions, 8 deletions
diff --git a/drivers/iommu/tegra-smmu.c b/drivers/iommu/tegra-smmu.c index 3172293cc55a..341f2b47a6ac 100644 --- a/drivers/iommu/tegra-smmu.c +++ b/drivers/iommu/tegra-smmu.c @@ -1161,9 +1161,6 @@ static int smmu_iommu_map_pages(struct iommu_domain *domain, unsigned long iova, tbl_page = SMMU_EX_PTBL_PAGE(pdir[pdn]); } - if (WARN_ON(!pfn_valid(page_to_pfn(tbl_page)))) - goto skip; - ptbl = page_address(tbl_page); for (i = 0; i < count; i++) { pte = &ptbl[ptn + i]; @@ -1179,7 +1176,7 @@ static int smmu_iommu_map_pages(struct iommu_domain *domain, unsigned long iova, if (!flush_all) flush_ptc_and_tlb_range(smmu, as, iova, pte, tbl_page, count); -skip: + iova += PAGE_SIZE * count; total -= count; pages += count; @@ -1238,9 +1235,6 @@ static int smmu_iommu_map_sg(struct iommu_domain *domain, unsigned long iova, tbl_page = SMMU_EX_PTBL_PAGE(pdir[pdn]); } - if (WARN_ON(!pfn_valid(page_to_pfn(tbl_page)))) - goto skip; - ptbl = page_address(tbl_page); for (i = 0; i < count; i++) { @@ -1264,7 +1258,7 @@ static int smmu_iommu_map_sg(struct iommu_domain *domain, unsigned long iova, if (!flush_all) flush_ptc_and_tlb_range(smmu, as, iova, pte, tbl_page, count); -skip: + iova += PAGE_SIZE * count; total -= count; |