linux-kernel - [PATCH 10/28] iommu/amd: Introduce amd_iommu_init

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Date:	Thu, 5 Jul 2012 14:36:30 +0200
From:	Joerg Roedel <joerg.roedel@....com>
To:	<iommu@...ts.linux-foundation.org>
CC:	<linux-kernel@...r.kernel.org>, Joerg Roedel <joerg.roedel@....com>
Subject: [PATCH 10/28] iommu/amd: Introduce amd_iommu_init_dma routine

This function will initialize everthing necessary so that
devices can do DMA. This includes dma_ops and iommu_ops.

Signed-off-by: Joerg Roedel <joerg.roedel@....com>
---
 drivers/iommu/amd_iommu_init.c |   27 ++++++++++++++++++++-------
 1 file changed, 20 insertions(+), 7 deletions(-)

diff --git a/drivers/iommu/amd_iommu_init.c b/drivers/iommu/amd_iommu_init.c
index ab3bc19..0afd89c 100644
--- a/drivers/iommu/amd_iommu_init.c
+++ b/drivers/iommu/amd_iommu_init.c
@@ -1633,8 +1633,6 @@ int amd_iommu_init_hardware(void)
 
 	enable_iommus();
 
-	amd_iommu_init_notifier();
-
 	register_syscore_ops(&amd_iommu_syscore_ops);
 
 	return ret;
@@ -1675,6 +1673,25 @@ static bool detect_ivrs(void)
 	return true;
 }
 
+static int amd_iommu_init_dma(void)
+{
+	int ret;
+
+	if (iommu_pass_through)
+		ret = amd_iommu_init_passthrough();
+	else
+		ret = amd_iommu_init_dma_ops();
+
+	if (ret)
+		return ret;
+
+	amd_iommu_init_api();
+
+	amd_iommu_init_notifier();
+
+	return 0;
+}
+
 /*
  * This is the core init function for AMD IOMMU hardware in the system.
  * This function is called from the generic x86 DMA layer initialization
@@ -1696,11 +1713,7 @@ static int __init amd_iommu_init(void)
 	if (ret)
 		goto free;
 
-	if (iommu_pass_through)
-		ret = amd_iommu_init_passthrough();
-	else
-		ret = amd_iommu_init_dma_ops();
-
+	ret = amd_iommu_init_dma();
 	if (ret)
 		goto free;
 
-- 
1.7.9.5


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