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authorJoerg Roedel <joerg.roedel@amd.com>2012-03-15 16:39:21 +0100
committerJoerg Roedel <joerg.roedel@amd.com>2012-03-15 16:39:21 +0100
commit3d9761e7a55b429ccee305a53669577b9cc20dac (patch)
tree1dfd475d5272c77dc9bb206f7e2f3be6083b4da7 /drivers/iommu
parent9ddd592a191b32f2ee6c4b6ed2bd52665c3a49f5 (diff)
downloadop-kernel-dev-3d9761e7a55b429ccee305a53669577b9cc20dac.zip
op-kernel-dev-3d9761e7a55b429ccee305a53669577b9cc20dac.tar.gz
iommu/amd: Move interrupt setup code into seperate function
For interrupt remapping the enablement of the IOMMU MSI interrupt needs to be deferred because the IOMMU itself will be initialized before the io-apics are up and running. So the code to setup the MSI is moved seperated from the hardware-setup routine now. Signed-off-by: Joerg Roedel <joerg.roedel@amd.com>
Diffstat (limited to 'drivers/iommu')
-rw-r--r--drivers/iommu/amd_iommu_init.c24
1 files changed, 23 insertions, 1 deletions
diff --git a/drivers/iommu/amd_iommu_init.c b/drivers/iommu/amd_iommu_init.c
index 182b80b..8b026bf 100644
--- a/drivers/iommu/amd_iommu_init.c
+++ b/drivers/iommu/amd_iommu_init.c
@@ -196,6 +196,8 @@ static u32 rlookup_table_size; /* size if the rlookup table */
*/
extern void iommu_flush_all_caches(struct amd_iommu *iommu);
+static int __init amd_iommu_enable_interrupts(void);
+
static inline void update_last_devid(u16 devid)
{
if (devid > amd_iommu_last_bdf)
@@ -1383,7 +1385,6 @@ static void enable_iommus(void)
iommu_enable_ppr_log(iommu);
iommu_enable_gt(iommu);
iommu_set_exclusion_range(iommu);
- iommu_init_msi(iommu);
iommu_enable(iommu);
iommu_flush_all_caches(iommu);
}
@@ -1411,6 +1412,8 @@ static void amd_iommu_resume(void)
/* re-load the hardware */
enable_iommus();
+
+ amd_iommu_enable_interrupts();
}
static int amd_iommu_suspend(void)
@@ -1595,6 +1598,21 @@ free:
return ret;
}
+static int __init amd_iommu_enable_interrupts(void)
+{
+ struct amd_iommu *iommu;
+ int ret = 0;
+
+ for_each_iommu(iommu) {
+ ret = iommu_init_msi(iommu);
+ if (ret)
+ goto out;
+ }
+
+out:
+ return ret;
+}
+
/*
* This is the core init function for AMD IOMMU hardware in the system.
* This function is called from the generic x86 DMA layer initialization
@@ -1612,6 +1630,10 @@ static int __init amd_iommu_init(void)
if (ret)
goto out;
+ ret = amd_iommu_enable_interrupts();
+ if (ret)
+ goto free;
+
if (iommu_pass_through)
ret = amd_iommu_init_passthrough();
else
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