linux-kernel - [PATCH v4 3/7] iommu/omap: announce supported page sizes

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Message-Id: <1318850846-16066-4-git-send-email-ohad@wizery.com>
Date:	Mon, 17 Oct 2011 13:27:22 +0200
From:	Ohad Ben-Cohen <ohad@...ery.com>
To:	<iommu@...ts.linux-foundation.org>
Cc:	<linux-omap@...r.kernel.org>,
	Laurent Pinchart <laurent.pinchart@...asonboard.com>,
	Joerg Roedel <Joerg.Roedel@....com>,
	David Woodhouse <dwmw2@...radead.org>,
	<linux-arm-kernel@...ts.infradead.org>,
	David Brown <davidb@...eaurora.org>,
	Arnd Bergmann <arnd@...db.de>, <linux-kernel@...r.kernel.org>,
	Hiroshi Doyu <hdoyu@...dia.com>,
	Stepan Moskovchenko <stepanm@...eaurora.org>,
	KyongHo Cho <pullip.cho@...sung.com>,
	Ohad Ben-Cohen <ohad@...ery.com>
Subject: [PATCH v4 3/7] iommu/omap: announce supported page sizes

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@...ery.com>
Cc: Hiroshi DOYU <hdoyu@...dia.com>
---
 drivers/iommu/omap-iommu.c |    4 ++++
 1 files changed, 4 insertions(+), 0 deletions(-)

diff --git a/drivers/iommu/omap-iommu.c b/drivers/iommu/omap-iommu.c
index 1bb2971..1692b6a 100644
--- a/drivers/iommu/omap-iommu.c
+++ b/drivers/iommu/omap-iommu.c
@@ -33,6 +33,9 @@
 	     (__i < (n)) && (cr = __iotlb_read_cr((obj), __i), true);	\
 	     __i++)
 
+/* bitmap of the page sizes currently supported */
+#define OMAP_IOMMU_PGSIZES	(SZ_4K | SZ_64K | SZ_1M | SZ_16M)
+
 /**
  * struct omap_iommu_domain - omap iommu domain
  * @pgtable:	the page table
@@ -1207,6 +1210,7 @@ static struct iommu_ops omap_iommu_ops = {
 	.unmap		= omap_iommu_unmap,
 	.iova_to_phys	= omap_iommu_iova_to_phys,
 	.domain_has_cap	= omap_iommu_domain_has_cap,
+	.pgsize_bitmap	= OMAP_IOMMU_PGSIZES,
 };
 
 static int __init omap_iommu_init(void)
-- 
1.7.4.1

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