diff options
| author | Laurent Pinchart <laurent.pinchart+renesas@ideasonboard.com> | 2014-05-15 12:40:49 +0200 |
|---|---|---|
| committer | Joerg Roedel <jroedel@suse.de> | 2014-05-26 11:22:25 +0200 |
| commit | dda7c2e4d3f160aecf21ca56d73ceb0ff6ede587 (patch) | |
| tree | 4ecd22517afc46bf543967408ca1714e46eb48eb /drivers/iommu | |
| parent | 9009f256596da78567d63c434691f7e409a99400 (diff) | |
| download | linux-0-day-dda7c2e4d3f160aecf21ca56d73ceb0ff6ede587.tar.gz linux-0-day-dda7c2e4d3f160aecf21ca56d73ceb0ff6ede587.tar.xz | |
iommu/ipmmu-vmsa: Support 2MB mappings
Add support for 2MB block mappings at the PMD level.
Signed-off-by: Laurent Pinchart <laurent.pinchart+renesas@ideasonboard.com>
Signed-off-by: Joerg Roedel <jroedel@suse.de>
Diffstat (limited to 'drivers/iommu')
| -rw-r--r-- | drivers/iommu/ipmmu-vmsa.c | 32 |
1 files changed, 29 insertions, 3 deletions
diff --git a/drivers/iommu/ipmmu-vmsa.c b/drivers/iommu/ipmmu-vmsa.c index 87703c3faf589..7f0522048c6b7 100644 --- a/drivers/iommu/ipmmu-vmsa.c +++ b/drivers/iommu/ipmmu-vmsa.c @@ -479,7 +479,7 @@ static void ipmmu_free_pmds(pud_t *pud) unsigned int i; for (i = 0; i < IPMMU_PTRS_PER_PMD; ++i) { - if (pmd_none(*pmd)) + if (!pmd_table(*pmd)) continue; ipmmu_free_ptes(pmd); @@ -610,6 +610,18 @@ static int ipmmu_alloc_init_pte(struct ipmmu_vmsa_device *mmu, pmd_t *pmd, return 0; } +static int ipmmu_alloc_init_pmd(struct ipmmu_vmsa_device *mmu, pmd_t *pmd, + unsigned long iova, unsigned long pfn, + int prot) +{ + pmdval_t pmdval = ipmmu_page_prot(prot, PMD_TYPE_SECT); + + *pmd = pfn_pmd(pfn, __pgprot(pmdval)); + ipmmu_flush_pgtable(mmu, pmd, sizeof(*pmd)); + + return 0; +} + static int ipmmu_handle_mapping(struct ipmmu_vmsa_domain *domain, unsigned long iova, phys_addr_t paddr, size_t size, int prot) @@ -642,7 +654,18 @@ static int ipmmu_handle_mapping(struct ipmmu_vmsa_domain *domain, goto done; } - ret = ipmmu_alloc_init_pte(mmu, pmd, iova, pfn, size, prot); + switch (size) { + case SZ_2M: + ret = ipmmu_alloc_init_pmd(mmu, pmd, iova, pfn, prot); + break; + case SZ_64K: + case SZ_4K: + ret = ipmmu_alloc_init_pte(mmu, pmd, iova, pfn, size, prot); + break; + default: + ret = -EINVAL; + break; + } done: spin_unlock_irqrestore(&domain->lock, flags); @@ -792,6 +815,9 @@ static phys_addr_t ipmmu_iova_to_phys(struct iommu_domain *io_domain, if (pmd_none(pmd)) return 0; + if (pmd_sect(pmd)) + return __pfn_to_phys(pmd_pfn(pmd)) | (iova & ~PMD_MASK); + pte = *(pmd_page_vaddr(pmd) + pte_index(iova)); if (pte_none(pte)) return 0; @@ -930,7 +956,7 @@ static struct iommu_ops ipmmu_ops = { .iova_to_phys = ipmmu_iova_to_phys, .add_device = ipmmu_add_device, .remove_device = ipmmu_remove_device, - .pgsize_bitmap = SZ_64K | SZ_4K, + .pgsize_bitmap = SZ_2M | SZ_64K | SZ_4K, }; /* ----------------------------------------------------------------------------- |