iommu/tegra: smmu: remove smmu_tegra_map_pages

Remove unused smmu_tegra_map_pages.

This can help improve code coverage as we would not be
supporting unused code paths.

Bug 1275792

Change-Id: Ie86333bef141e45ccf2c01ae2868fd12fd71625a
Signed-off-by: Sri Krishna chowdary <schowdary@nvidia.com>
Reviewed-on: http://git-master/r/563074
Reviewed-by: Automatic_Commit_Validation_User
GVS: Gerrit_Virtual_Submit
Reviewed-by: Hiroshi Doyu <hdoyu@nvidia.com>

diff --git a/drivers/iommu/tegra-smmu.c b/drivers/iommu/tegra-smmu.c
index 2383655271175fddc9b5ad5cb0741a4c412cda2e..ced76bde5e339720c567ab779c85060ccd878f75 100644 (file)
--- a/drivers/iommu/tegra-smmu.c
+++ b/drivers/iommu/tegra-smmu.c
@@ -1234,79 +1234,6 @@ static int smmu_iommu_map(struct iommu_domain *domain, unsigned long iova,
        return err;
 }
 
-static int smmu_iommu_map_pages(struct iommu_domain *domain, unsigned long iova,
-                               struct page **pages, size_t total, unsigned long prot)
-{
-       struct smmu_as *as = domain_to_as(domain, iova);
-       struct smmu_device *smmu = as->smmu;
-       u32 *pdir = page_address(as->pdir_page);
-       int err = 0;
-       unsigned long iova_base = iova;
-       bool flush_all = (total > smmu_flush_all_th_pages) ? true : false;
-       int attrs = as->pte_attr;
-
-       if (dma_get_attr(DMA_ATTR_READ_ONLY, (struct dma_attrs *)prot))
-               attrs &= ~_WRITABLE;
-       else if (dma_get_attr(DMA_ATTR_WRITE_ONLY, (struct dma_attrs *)prot))
-               attrs &= ~_READABLE;
-
-       while (total > 0) {
-               int pdn = SMMU_ADDR_TO_PDN(iova);
-               int ptn = SMMU_ADDR_TO_PTN(iova);
-               unsigned int *rest = &as->pte_count[pdn];
-               int count = min_t(size_t, SMMU_PTBL_COUNT - ptn, total);
-               struct page *tbl_page;
-               u32 *ptbl;
-               u32 *pte;
-               int i;
-               unsigned long flags;
-
-               spin_lock_irqsave(&as->lock, flags);
-
-               if (pdir[pdn] == _PDE_VACANT(pdn)) {
-                       tbl_page = alloc_ptbl(as, iova, !flush_all);
-                       if (!tbl_page) {
-                               err = -ENOMEM;
-                               spin_unlock_irqrestore(&as->lock, flags);
-                               goto out;
-                       }
-
-               } else {
-                       tbl_page = SMMU_EX_PTBL_PAGE(pdir[pdn]);
-               }
-
-               ptbl = page_address(tbl_page);
-               for (i = 0; i < count; i++) {
-                       pte = &ptbl[ptn + i];
-
-                       if (*pte == _PTE_VACANT(iova + i * PAGE_SIZE))
-                               (*rest)++;
-
-                       *pte = SMMU_PFN_TO_PTE(page_to_pfn(pages[i]), attrs);
-                       trace_smmu_set_pte(as->asid, iova, page_to_phys(pages[i]),
-                                          PAGE_SIZE, attrs);
-               }
-
-               pte = &ptbl[ptn];
-               FLUSH_CPU_DCACHE(pte, tbl_page, count * sizeof(*pte));
-               if (!flush_all)
-                       flush_ptc_and_tlb_range(smmu, as, iova, pte, tbl_page,
-                                               count);
-
-               iova += PAGE_SIZE * count;
-               total -= count;
-               pages += count;
-
-               spin_unlock_irqrestore(&as->lock, flags);
-       }
-
-out:
-       if (flush_all)
-               flush_ptc_and_tlb_as(as, iova_base,
-                                    iova_base + total * PAGE_SIZE);
-       return err;
-}
-
 #define sg_num_pages(sg)                                       \
        (PAGE_ALIGN((sg)->offset + (sg)->length) >> PAGE_SHIFT)
 
@@ -1788,7 +1715,6 @@ static struct iommu_ops smmu_iommu_ops = {
        .attach_dev     = smmu_iommu_attach_dev,
        .detach_dev     = smmu_iommu_detach_dev,
        .map            = smmu_iommu_map,
-       .map_pages      = smmu_iommu_map_pages,
        .map_sg         = smmu_iommu_map_sg,
        .unmap          = smmu_iommu_unmap,
        .iova_to_phys   = smmu_iommu_iova_to_phys,