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authorJoerg Roedel <joerg.roedel@amd.com>2012-06-12 14:09:35 +0400
committerJoerg Roedel <joerg.roedel@amd.com>2012-07-17 14:14:58 +0400
commit643511b37eb72d831646bacafaeace1eeadf5a54 (patch)
treeb541b53f37fe8a49b4edccd96c924099dfaee201 /drivers/iommu/amd_iommu_init.c
parent4d121c3256edc66fe8a8e7f975eba72add120a26 (diff)
downloadlinux-643511b37eb72d831646bacafaeace1eeadf5a54.tar.xz
iommu/amd: Introduce early_amd_iommu_init routine
Split out the code to parse the ACPI table and setup relevant data structures into a new function. Signed-off-by: Joerg Roedel <joerg.roedel@amd.com>
Diffstat (limited to 'drivers/iommu/amd_iommu_init.c')
-rw-r--r--drivers/iommu/amd_iommu_init.c38
1 files changed, 23 insertions, 15 deletions
diff --git a/drivers/iommu/amd_iommu_init.c b/drivers/iommu/amd_iommu_init.c
index b18034a8fdb3..a5dbefb8e260 100644
--- a/drivers/iommu/amd_iommu_init.c
+++ b/drivers/iommu/amd_iommu_init.c
@@ -1491,17 +1491,14 @@ static void __init free_on_init_error(void)
* After everything is set up the IOMMUs are enabled and the necessary
* hotplug and suspend notifiers are registered.
*/
-int __init amd_iommu_init_hardware(void)
+static int __init early_amd_iommu_init(void)
{
struct acpi_table_header *ivrs_base;
acpi_size ivrs_size;
acpi_status status;
int i, ret = 0;
- if (no_iommu || (iommu_detected && !gart_iommu_aperture))
- return -ENODEV;
-
- if (amd_iommu_disabled || !amd_iommu_detected)
+ if (!amd_iommu_detected)
return -ENODEV;
if (amd_iommu_dev_table != NULL) {
@@ -1588,16 +1585,6 @@ int __init amd_iommu_init_hardware(void)
if (ret)
goto free;
- ret = amd_iommu_init_pci();
- if (ret)
- goto free;
-
- enable_iommus();
-
- amd_iommu_init_notifier();
-
- register_syscore_ops(&amd_iommu_syscore_ops);
-
out:
/* Don't leak any ACPI memory */
early_acpi_os_unmap_memory((char __iomem *)ivrs_base, ivrs_size);
@@ -1611,6 +1598,27 @@ free:
goto out;
}
+int __init amd_iommu_init_hardware(void)
+{
+ int ret = 0;
+
+ ret = early_amd_iommu_init();
+ if (ret)
+ return ret;
+
+ ret = amd_iommu_init_pci();
+ if (ret)
+ return ret;
+
+ enable_iommus();
+
+ amd_iommu_init_notifier();
+
+ register_syscore_ops(&amd_iommu_syscore_ops);
+
+ return ret;
+}
+
static int amd_iommu_enable_interrupts(void)
{
struct amd_iommu *iommu;