linux-kernel - [PATCH 3/4] amd-iommu: Implement iommu_device

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Message-ID: <20111021195618.8438.17663.stgit@s20.home>
Date:	Fri, 21 Oct 2011 13:56:18 -0600
From:	Alex Williamson <alex.williamson@...hat.com>
To:	joerg.roedel@....com, dwmw2@...radead.org,
	iommu@...ts.linux-foundation.org
Cc:	linux-kernel@...r.kernel.org, chrisw@...hat.com, agraf@...e.de,
	dwg@....ibm.com, scottwood@...escale.com, B08248@...escale.com,
	benh@...nel.crashing.org, alex.williamson@...hat.com
Subject: [PATCH 3/4] amd-iommu: Implement iommu_device_group

Just use the amd_iommu_alias_table directly.

Signed-off-by: Alex Williamson <alex.williamson@...hat.com>
---

 drivers/iommu/amd_iommu.c |   13 +++++++++++++
 1 files changed, 13 insertions(+), 0 deletions(-)

diff --git a/drivers/iommu/amd_iommu.c b/drivers/iommu/amd_iommu.c
index 4ee277a..1d82b63 100644
--- a/drivers/iommu/amd_iommu.c
+++ b/drivers/iommu/amd_iommu.c
@@ -2773,6 +2773,18 @@ static int amd_iommu_domain_has_cap(struct iommu_domain *domain,
 	return 0;
 }
 
+static int amd_iommu_device_group(struct device *dev, unsigned int *groupid)
+{
+	struct iommu_dev_data *dev_data = dev->archdata.iommu;
+
+	if (!dev_data)
+		return -ENODEV;
+
+	*groupid = amd_iommu_alias_table[dev_data->devid];
+
+	return 0;
+}
+
 static struct iommu_ops amd_iommu_ops = {
 	.domain_init = amd_iommu_domain_init,
 	.domain_destroy = amd_iommu_domain_destroy,
@@ -2782,6 +2794,7 @@ static struct iommu_ops amd_iommu_ops = {
 	.unmap = amd_iommu_unmap,
 	.iova_to_phys = amd_iommu_iova_to_phys,
 	.domain_has_cap = amd_iommu_domain_has_cap,
+	.device_group = amd_iommu_device_group,
 };
 
 /*****************************************************************************

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