[PATCH v3 2/6] iommu/omap: announce supported page sizes
From: Ohad Ben-Cohen <hidden>
Date: 2011-09-16 17:53:30
Also in:
linux-omap, lkml
Subsystem:
iommu subsystem, the rest · Maintainers:
Joerg Roedel, Will Deacon, Linus Torvalds
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 <redacted> Cc: Hiroshi DOYU <redacted> --- 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