linux-kernel - [PATCH 05/20] iommu/amd: Implement apply_dm

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Message-Id: <1467978311-28322-6-git-send-email-joro@8bytes.org>
Date:	Fri,  8 Jul 2016 13:44:56 +0200
From:	Joerg Roedel <joro@...tes.org>
To:	iommu@...ts.linux-foundation.org
Cc:	linux-kernel@...r.kernel.org,
	Suravee Suthikulpanit <Suravee.Suthikulpanit@....com>,
	Vincent.Wan@....com, Joerg Roedel <jroedel@...e.de>
Subject: [PATCH 05/20] iommu/amd: Implement apply_dm_region call-back

From: Joerg Roedel <jroedel@...e.de>

It is used to reserve the dm-regions in the iova-tree.

Signed-off-by: Joerg Roedel <jroedel@...e.de>
---
 drivers/iommu/amd_iommu.c | 15 +++++++++++++++
 1 file changed, 15 insertions(+)

diff --git a/drivers/iommu/amd_iommu.c b/drivers/iommu/amd_iommu.c
index 4b8b9ee..5ea5679 100644
--- a/drivers/iommu/amd_iommu.c
+++ b/drivers/iommu/amd_iommu.c
@@ -3379,6 +3379,20 @@ static void amd_iommu_put_dm_regions(struct device *dev,
 		kfree(entry);
 }
 
+static void amd_iommu_apply_dm_region(struct device *dev,
+				      struct iommu_domain *domain,
+				      struct iommu_dm_region *region)
+{
+	struct protection_domain *pdomain = to_pdomain(domain);
+	struct dma_ops_domain *dma_dom = pdomain->priv;
+	unsigned long start, end;
+
+	start = IOVA_PFN(region->start);
+	end   = IOVA_PFN(region->start + region->length);
+
+	WARN_ON_ONCE(reserve_iova(&dma_dom->iovad, start, end) == NULL);
+}
+
 static const struct iommu_ops amd_iommu_ops = {
 	.capable = amd_iommu_capable,
 	.domain_alloc = amd_iommu_domain_alloc,
@@ -3394,6 +3408,7 @@ static const struct iommu_ops amd_iommu_ops = {
 	.device_group = amd_iommu_device_group,
 	.get_dm_regions = amd_iommu_get_dm_regions,
 	.put_dm_regions = amd_iommu_put_dm_regions,
+	.apply_dm_region = amd_iommu_apply_dm_region,
 	.pgsize_bitmap	= AMD_IOMMU_PGSIZES,
 };
 
-- 
1.9.1