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Subject[PATCH v3 2/6] iommu/omap: 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: Hiroshi DOYU <Hiroshi.DOYU@nokia.com>
---
drivers/iommu/omap-iommu.c | 6 +++++-
1 files changed, 5 insertions(+), 1 deletions(-)
diff --git a/drivers/iommu/omap-iommu.c b/drivers/iommu/omap-iommu.c
index 7e0188f..403dd6a 100644
--- a/drivers/iommu/omap-iommu.c
+++ b/drivers/iommu/omap-iommu.c
@@ -1202,6 +1202,9 @@ static int omap_iommu_domain_has_cap(struct iommu_domain *domain,
return 0;
}

+/* bitmap of the page sizes supported by the OMAP IOMMU hardware */
+static unsigned long omap_iommu_pgsizes = SZ_4K | SZ_64K | SZ_1M | SZ_16M;
+
static struct iommu_ops omap_iommu_ops = {
.domain_init = omap_iommu_domain_init,
.domain_destroy = omap_iommu_domain_destroy,
@@ -1225,7 +1228,8 @@ static int __init omap_iommu_init(void)
return -ENOMEM;
iopte_cachep = p;

- register_iommu(&omap_iommu_ops);
+ /* we're only using the first 25 bits of the pgsizes bitmap */
+ register_iommu_pgsize(&omap_iommu_ops, &omap_iommu_pgsizes, 25);

return platform_driver_register(&omap_iommu_driver);
}
--
1.7.4.1


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