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From:   Laurentiu Tudor <laurentiu.tudor@nxp.com>
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        Camelia Alexandra Groza <camelia.groza@nxp.com>,
        Laurentiu Tudor <laurentiu.tudor@nxp.com>
Subject: [PATCH v3 2/4] iommu/dma: wire-up new dma map op .get_virt_addr
Thread-Topic: [PATCH v3 2/4] iommu/dma: wire-up new dma map op .get_virt_addr
Thread-Index: AQHVmh1GAJk81aT3UUaEgIm4Q06aaw==
Date:   Wed, 13 Nov 2019 12:24:21 +0000
Message-ID: <20191113122407.1171-3-laurentiu.tudor@nxp.com>
References: <20191113122407.1171-1-laurentiu.tudor@nxp.com>
In-Reply-To: <20191113122407.1171-1-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 | 13 +++++++++++++
 1 file changed, 13 insertions(+)

diff --git a/drivers/iommu/dma-iommu.c b/drivers/iommu/dma-iommu.c
index f321279baf9e..98742c1451ce 100644
--- a/drivers/iommu/dma-iommu.c
+++ b/drivers/iommu/dma-iommu.c
@@ -1091,6 +1091,18 @@ 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_dma_domain(dev);
+	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 +1119,7 @@ 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