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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: Madalin Bucur <madalin.bucur@nxp.com>,
	Leo Li <leoyang.li@nxp.com>,
	"robin.murphy@arm.com" <robin.murphy@arm.com>,
	"davem@davemloft.net" <davem@davemloft.net>
Subject: [PATCH v2 2/3] iommu/dma: wire-up new dma map op .get_virt_addr
Date: Thu, 24 Oct 2019 12:41:43 +0000	[thread overview]
Message-ID: <20191024124130.16871-3-laurentiu.tudor@nxp.com> (raw)
In-Reply-To: <20191024124130.16871-1-laurentiu.tudor@nxp.com>

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(struct device *dev)
 	return (1UL << __ffs(domain->pgsize_bitmap)) - 1;
 }
 
+static void *iommu_dma_get_virt_addr(struct device *dev, dma_addr_t dma_handle)
+{
+	struct iommu_domain *domain = iommu_get_domain_for_dev(dev);
+
+	if (domain) {
+		phys_addr_t phys;
+
+		phys = 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 = {
 	.alloc			= iommu_dma_alloc,
 	.free			= iommu_dma_free,
@@ -1107,6 +1122,7 @@ static const struct dma_map_ops iommu_dma_ops = {
 	.map_resource		= iommu_dma_map_resource,
 	.unmap_resource		= iommu_dma_unmap_resource,
 	.get_merge_boundary	= iommu_dma_get_merge_boundary,
+	.get_virt_addr		= iommu_dma_get_virt_addr,
 };
 
 /*
-- 
2.17.1

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  parent reply	other threads:[~2019-10-24 12:41 UTC|newest]

Thread overview: 15+ messages / expand[flat|nested]  mbox.gz  Atom feed  top
2019-10-24 12:41 [PATCH v2 0/3] dma-mapping: introduce new dma unmap and sync variants Laurentiu Tudor
2019-10-24 12:41 ` [PATCH v2 1/3] dma-mapping: introduce new dma unmap and sync api variants Laurentiu Tudor
2019-10-28 12:38   ` hch
2019-10-29  7:05     ` Laurentiu Tudor
2019-10-28 13:42   ` Robin Murphy
2019-11-06 11:32     ` Laurentiu Tudor
2019-11-07 12:30     ` Laurentiu Tudor
2019-10-30  9:48   ` kbuild test robot
2019-10-24 12:41 ` Laurentiu Tudor [this message]
2019-10-28 13:52   ` [PATCH v2 2/3] iommu/dma: wire-up new dma map op .get_virt_addr Robin Murphy
2019-10-24 12:41 ` [PATCH v2 3/3] dpaa2_eth: use new unmap and sync dma api variants Laurentiu Tudor
2019-10-25 16:12   ` Jonathan Lemon
2019-10-28 10:55     ` Laurentiu Tudor
2019-10-28 11:38       ` hch
2019-11-06 11:17         ` Laurentiu Tudor

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