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Subject[PATCH v3 3/6] iommu/msm: announce supported page sizes
Date
Let the IOMMU core know we support 4KiB, 64KiB, 1MiB and 16MiB page sizes.

This way the IOMMU core can split any arbitrary-sized physically
contiguous regions (that it needs to map) as needed.

Signed-off-by: Ohad Ben-Cohen <ohad@wizery.com>
Cc: David Brown <davidb@codeaurora.org>
Cc: Stepan Moskovchenko <stepanm@codeaurora.org>
---
drivers/iommu/msm_iommu.c | 8 +++++++-
1 files changed, 7 insertions(+), 1 deletions(-)
diff --git a/drivers/iommu/msm_iommu.c b/drivers/iommu/msm_iommu.c
index d1733f6..a4ed116 100644
--- a/drivers/iommu/msm_iommu.c
+++ b/drivers/iommu/msm_iommu.c
@@ -676,6 +676,9 @@ fail:
return 0;
}

+/* bitmap of the page sizes currently supported */
+static unsigned long msm_iommu_pgsizes = SZ_4K | SZ_64K | SZ_1M | SZ_16M;
+
static struct iommu_ops msm_iommu_ops = {
.domain_init = msm_iommu_domain_init,
.domain_destroy = msm_iommu_domain_destroy,
@@ -728,7 +731,10 @@ static void __init setup_iommu_tex_classes(void)
static int __init msm_iommu_init(void)
{
setup_iommu_tex_classes();
- register_iommu(&msm_iommu_ops);
+
+ /* we're only using the first 25 bits of the pgsizes bitmap */
+ register_iommu_pgsize(&msm_iommu_ops, &msm_iommu_pgsizes, 25);
+
return 0;
}

--
1.7.4.1


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