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| author | Nicolin Chen <nicoleotsuka@gmail.com> | 2020-09-11 00:16:41 -0700 |
|---|---|---|
| committer | Joerg Roedel <jroedel@suse.de> | 2020-09-24 12:32:31 +0200 |
| commit | 82fa58e81d9edc77182aaba4110c3124481e6704 (patch) | |
| tree | 1e316fbc8ec5369f3c877b1ce8652d4b2bbbe5fc /drivers/iommu/tegra-smmu.c | |
| parent | 675d12acb66bb190d32a3fae187e379f01cbd8ce (diff) | |
| download | linux-82fa58e81d9edc77182aaba4110c3124481e6704.tar.bz2 | |
iommu/tegra-smmu: Do not use PAGE_SHIFT and PAGE_MASK
PAGE_SHIFT and PAGE_MASK are defined corresponding to the page size
for CPU virtual addresses, which means PAGE_SHIFT could be a number
other than 12, but tegra-smmu maintains fixed 4KB IOVA pages and has
fixed [21:12] bit range for PTE entries.
So this patch replaces all PAGE_SHIFT/PAGE_MASK references with the
macros defined with SMMU_PTE_SHIFT.
Signed-off-by: Nicolin Chen <nicoleotsuka@gmail.com>
Acked-by: Thierry Reding <treding@nvidia.com>
Link: https://lore.kernel.org/r/20200911071643.17212-2-nicoleotsuka@gmail.com
Signed-off-by: Joerg Roedel <jroedel@suse.de>
Diffstat (limited to 'drivers/iommu/tegra-smmu.c')
| -rw-r--r-- | drivers/iommu/tegra-smmu.c | 14 |
1 files changed, 10 insertions, 4 deletions
diff --git a/drivers/iommu/tegra-smmu.c b/drivers/iommu/tegra-smmu.c index 9bfff94ca348..bd473e085aac 100644 --- a/drivers/iommu/tegra-smmu.c +++ b/drivers/iommu/tegra-smmu.c @@ -130,6 +130,11 @@ static inline u32 smmu_readl(struct tegra_smmu *smmu, unsigned long offset) #define SMMU_PDE_SHIFT 22 #define SMMU_PTE_SHIFT 12 +#define SMMU_PAGE_MASK (~(SMMU_SIZE_PT-1)) +#define SMMU_OFFSET_IN_PAGE(x) ((unsigned long)(x) & ~SMMU_PAGE_MASK) +#define SMMU_PFN_PHYS(x) ((phys_addr_t)(x) << SMMU_PTE_SHIFT) +#define SMMU_PHYS_PFN(x) ((unsigned long)((x) >> SMMU_PTE_SHIFT)) + #define SMMU_PD_READABLE (1 << 31) #define SMMU_PD_WRITABLE (1 << 30) #define SMMU_PD_NONSECURE (1 << 29) @@ -644,7 +649,7 @@ static void tegra_smmu_set_pte(struct tegra_smmu_as *as, unsigned long iova, u32 *pte, dma_addr_t pte_dma, u32 val) { struct tegra_smmu *smmu = as->smmu; - unsigned long offset = offset_in_page(pte); + unsigned long offset = SMMU_OFFSET_IN_PAGE(pte); *pte = val; @@ -726,7 +731,7 @@ __tegra_smmu_map(struct iommu_domain *domain, unsigned long iova, pte_attrs |= SMMU_PTE_WRITABLE; tegra_smmu_set_pte(as, iova, pte, pte_dma, - __phys_to_pfn(paddr) | pte_attrs); + SMMU_PHYS_PFN(paddr) | pte_attrs); return 0; } @@ -790,7 +795,7 @@ static phys_addr_t tegra_smmu_iova_to_phys(struct iommu_domain *domain, pfn = *pte & as->smmu->pfn_mask; - return PFN_PHYS(pfn); + return SMMU_PFN_PHYS(pfn); } static struct tegra_smmu *tegra_smmu_find(struct device_node *np) @@ -1108,7 +1113,8 @@ struct tegra_smmu *tegra_smmu_probe(struct device *dev, smmu->dev = dev; smmu->mc = mc; - smmu->pfn_mask = BIT_MASK(mc->soc->num_address_bits - PAGE_SHIFT) - 1; + smmu->pfn_mask = + BIT_MASK(mc->soc->num_address_bits - SMMU_PTE_SHIFT) - 1; dev_dbg(dev, "address bits: %u, PFN mask: %#lx\n", mc->soc->num_address_bits, smmu->pfn_mask); smmu->tlb_mask = (1 << fls(smmu->soc->num_tlb_lines)) - 1; |