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From:   Laurentiu Tudor <laurentiu.tudor@nxp.com>
To:     "hch@lst.de" <hch@lst.de>, "joro@8bytes.org" <joro@8bytes.org>,
        Ioana Ciocoi Radulescu <ruxandra.radulescu@nxp.com>,
        "linux-kernel@vger.kernel.org" <linux-kernel@vger.kernel.org>,
        "iommu@lists.linux-foundation.org" <iommu@lists.linux-foundation.org>,
        "netdev@vger.kernel.org" <netdev@vger.kernel.org>,
        Ioana Ciornei <ioana.ciornei@nxp.com>
CC:     Leo Li <leoyang.li@nxp.com>,
        "robin.murphy@arm.com" <robin.murphy@arm.com>,
        Diana Madalina Craciun <diana.craciun@nxp.com>,
        "davem@davemloft.net" <davem@davemloft.net>,
        Madalin Bucur <madalin.bucur@nxp.com>,
        Laurentiu Tudor <laurentiu.tudor@nxp.com>
Subject: [PATCH v2 2/3] iommu/dma: wire-up new dma map op .get_virt_addr
Thread-Topic: [PATCH v2 2/3] iommu/dma: wire-up new dma map op .get_virt_addr
Thread-Index: AQHVimhko79KRtEs6EStpPYaN5eAjw==
Date:   Thu, 24 Oct 2019 12:41:43 +0000
Message-ID: <20191024124130.16871-3-laurentiu.tudor@nxp.com>
References: <20191024124130.16871-1-laurentiu.tudor@nxp.com>
In-Reply-To: <20191024124130.16871-1-laurentiu.tudor@nxp.com>
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From: Laurentiu Tudor <laurentiu.tudor@nxp.com>

Add an implementation of the newly introduced dma map op in the
generic DMA IOMMU generic glue layer and wire it up.

Signed-off-by: Laurentiu Tudor <laurentiu.tudor@nxp.com>
---
 drivers/iommu/dma-iommu.c | 16 ++++++++++++++++
 1 file changed, 16 insertions(+)

diff --git a/drivers/iommu/dma-iommu.c b/drivers/iommu/dma-iommu.c
index f321279baf9e..15e76232d697 100644
--- a/drivers/iommu/dma-iommu.c
+++ b/drivers/iommu/dma-iommu.c
@@ -1091,6 +1091,21 @@ static unsigned long iommu_dma_get_merge_boundary(st=
ruct device *dev)
 	return (1UL << __ffs(domain->pgsize_bitmap)) - 1;
 }
=20
+static void *iommu_dma_get_virt_addr(struct device *dev, dma_addr_t dma_ha=
ndle)
+{
+	struct iommu_domain *domain =3D iommu_get_domain_for_dev(dev);
+
+	if (domain) {
+		phys_addr_t phys;
+
+		phys =3D iommu_iova_to_phys(domain, dma_handle);
+		if (phys)
+			return phys_to_virt(phys);
+	}
+
+	return NULL;
+}
+
 static const struct dma_map_ops iommu_dma_ops =3D {
 	.alloc			=3D iommu_dma_alloc,
 	.free			=3D iommu_dma_free,
@@ -1107,6 +1122,7 @@ static const struct dma_map_ops iommu_dma_ops =3D {
 	.map_resource		=3D iommu_dma_map_resource,
 	.unmap_resource		=3D iommu_dma_unmap_resource,
 	.get_merge_boundary	=3D iommu_dma_get_merge_boundary,
+	.get_virt_addr		=3D iommu_dma_get_virt_addr,
 };
=20
 /*
--=20
2.17.1