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FROMLIST: iommu/io-pgtable-arm-v7s: Implement arm_v7s_unmap_pages()

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Implement the unmap_pages() callback for the ARM v7s io-pgtable
format.

Bug: 178537788
Change-Id: I964390fe18a6ce0f1c7c2bd6f52707507d0450cd
Link: https://lore.kernel.org/linux-iommu/20210408171402.12607-1-isaacm@codeaurora.org/T/#t
Signed-off-by: Isaac J. Manjarres <isaacm@codeaurora.org>
This commit is contained in:
Isaac J. Manjarres
2021-04-07 17:33:36 -07:00
committed by Todd Kjos
parent ac3994447c
commit a9b45f6174
1 changed files with 21 additions and 3 deletions
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24
drivers/iommu/io-pgtable-arm-v7s.c
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@@ -710,15 +710,32 @@ static size_t __arm_v7s_unmap(struct arm_v7s_io_pgtable *data,
return __arm_v7s_unmap(data, gather, iova, size, lvl + 1, ptep);
}
static size_t arm_v7s_unmap(struct io_pgtable_ops *ops, unsigned long iova,
size_t size, struct iommu_iotlb_gather *gather)
static size_t arm_v7s_unmap_pages(struct io_pgtable_ops *ops, unsigned long iova,
size_t pgsize, size_t pgcount,
struct iommu_iotlb_gather *gather)
{
struct arm_v7s_io_pgtable *data = io_pgtable_ops_to_data(ops);
size_t unmapped = 0, ret;
if (WARN_ON(iova >= (1ULL << data->iop.cfg.ias)))
return 0;
return __arm_v7s_unmap(data, gather, iova, size, 1, data->pgd);
while (pgcount--) {
ret = __arm_v7s_unmap(data, gather, iova, pgsize, 1, data->pgd);
if (!ret)
break;
unmapped += pgsize;
iova += pgsize;
}
return unmapped;
}
static size_t arm_v7s_unmap(struct io_pgtable_ops *ops, unsigned long iova,
size_t size, struct iommu_iotlb_gather *gather)
{
return arm_v7s_unmap_pages(ops, iova, size, 1, gather);
}
static phys_addr_t arm_v7s_iova_to_phys(struct io_pgtable_ops *ops,
@@ -781,6 +798,7 @@ static struct io_pgtable *arm_v7s_alloc_pgtable(struct io_pgtable_cfg *cfg,
data->iop.ops = (struct io_pgtable_ops) {
.map = arm_v7s_map,
.unmap = arm_v7s_unmap,
.unmap_pages = arm_v7s_unmap_pages,
.iova_to_phys = arm_v7s_iova_to_phys,
};