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Message-Id: <1432831305-11126-20-git-send-email-joro@8bytes.org>
Date: Thu, 28 May 2015 18:41:42 +0200
From: Joerg Roedel <joro@...tes.org>
To: iommu@...ts.linux-foundation.org
Cc: Will Deacon <will.deacon@....com>, Kukjin Kim <kgene@...nel.org>,
David Woodhouse <dwmw2@...radead.org>,
Heiko Stuebner <heiko@...ech.de>,
Hiroshi Doyu <hdoyu@...dia.com>,
Thierry Reding <thierry.reding@...il.com>,
Alex Williamson <alex.williamson@...hat.com>,
Robin Murphy <robin.murphy@....com>,
Laurent Pinchart <laurent.pinchart@...asonboard.com>,
Oded Gabbay <oded.gabbay@...il.com>, joro@...tes.org,
jroedel@...e.de, linux-kernel@...r.kernel.org
Subject: [PATCH 19/22] iommu/amd: Put IOMMUv2 devices in a direct mapped domain
From: Joerg Roedel <jroedel@...e.de>
A device that might be used for HSA needs to be in a direct
mapped domain so that all DMA-API mappings stay alive when
the IOMMUv2 stack is used.
Signed-off-by: Joerg Roedel <jroedel@...e.de>
---
drivers/iommu/amd_iommu.c | 15 ++++++++++++++-
1 file changed, 14 insertions(+), 1 deletion(-)
diff --git a/drivers/iommu/amd_iommu.c b/drivers/iommu/amd_iommu.c
index 33bbb4d..8682786 100644
--- a/drivers/iommu/amd_iommu.c
+++ b/drivers/iommu/amd_iommu.c
@@ -2253,6 +2253,8 @@ static void detach_device(struct device *dev)
static int amd_iommu_add_device(struct device *dev)
{
+ struct iommu_dev_data *dev_data;
+ struct iommu_domain *domain;
struct amd_iommu *iommu;
u16 devid;
int ret;
@@ -2270,7 +2272,18 @@ static int amd_iommu_add_device(struct device *dev)
}
init_iommu_group(dev);
- dev->archdata.dma_ops = &amd_iommu_dma_ops;
+ dev_data = get_dev_data(dev);
+ if (dev_data && dev_data->iommu_v2)
+ iommu_request_dm_for_dev(dev);
+
+ /* Domains are initialized for this device - have a look what we ended up with */
+ domain = iommu_get_domain_for_dev(dev);
+ if (domain->type == IOMMU_DOMAIN_IDENTITY) {
+ dev_data->passthrough = true;
+ dev->archdata.dma_ops = &nommu_dma_ops;
+ } else {
+ dev->archdata.dma_ops = &amd_iommu_dma_ops;
+ }
out:
iommu_completion_wait(iommu);
--
1.9.1
--
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