diff options
Diffstat (limited to 'drivers/gpu/drm/msm/msm_iommu.c')
| -rw-r--r-- | drivers/gpu/drm/msm/msm_iommu.c | 22 |
1 files changed, 20 insertions, 2 deletions
diff --git a/drivers/gpu/drm/msm/msm_iommu.c b/drivers/gpu/drm/msm/msm_iommu.c index 739ce2c283a4..3c2eb59bfd49 100644 --- a/drivers/gpu/drm/msm/msm_iommu.c +++ b/drivers/gpu/drm/msm/msm_iommu.c @@ -113,7 +113,8 @@ static int msm_iommu_pagetable_unmap(struct msm_mmu *mmu, u64 iova, } static int msm_iommu_pagetable_map(struct msm_mmu *mmu, u64 iova, - struct sg_table *sgt, size_t len, int prot) + struct sg_table *sgt, size_t off, size_t len, + int prot) { struct msm_iommu_pagetable *pagetable = to_pagetable(mmu); struct io_pgtable_ops *ops = pagetable->pgtbl_ops; @@ -125,6 +126,19 @@ static int msm_iommu_pagetable_map(struct msm_mmu *mmu, u64 iova, size_t size = sg->length; phys_addr_t phys = sg_phys(sg); + if (!len) + break; + + if (size <= off) { + off -= size; + continue; + } + + phys += off; + size -= off; + size = min_t(size_t, size, len); + off = 0; + while (size) { size_t pgsize, count, mapped = 0; int ret; @@ -140,6 +154,7 @@ static int msm_iommu_pagetable_map(struct msm_mmu *mmu, u64 iova, phys += mapped; addr += mapped; size -= mapped; + len -= mapped; if (ret) { msm_iommu_pagetable_unmap(mmu, iova, addr - iova); @@ -388,11 +403,14 @@ static void msm_iommu_detach(struct msm_mmu *mmu) } static int msm_iommu_map(struct msm_mmu *mmu, uint64_t iova, - struct sg_table *sgt, size_t len, int prot) + struct sg_table *sgt, size_t off, size_t len, + int prot) { struct msm_iommu *iommu = to_msm_iommu(mmu); size_t ret; + WARN_ON(off != 0); + /* The arm-smmu driver expects the addresses to be sign extended */ if (iova & BIT_ULL(48)) iova |= GENMASK_ULL(63, 49); |