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Subject[PATCH 07/28] iommu/amd: Introduce early_amd_iommu_init routine
Date
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>
---
drivers/iommu/amd_iommu.c | 1 -
drivers/iommu/amd_iommu_init.c | 38 +++++++++++++++++++++++---------------
2 files changed, 23 insertions(+), 16 deletions(-)

diff --git a/drivers/iommu/amd_iommu.c b/drivers/iommu/amd_iommu.c
index a2e418c..cfa01c4 100644
--- a/drivers/iommu/amd_iommu.c
+++ b/drivers/iommu/amd_iommu.c
@@ -382,7 +382,6 @@ DECLARE_STATS_COUNTER(invalidate_iotlb);
DECLARE_STATS_COUNTER(invalidate_iotlb_all);
DECLARE_STATS_COUNTER(pri_requests);

-
static struct dentry *stats_dir;
static struct dentry *de_fflush;

diff --git a/drivers/iommu/amd_iommu_init.c b/drivers/iommu/amd_iommu_init.c
index e6782fa..1b23235 100644
--- a/drivers/iommu/amd_iommu_init.c
+++ b/drivers/iommu/amd_iommu_init.c
@@ -1494,17 +1494,14 @@ 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) {
@@ -1591,16 +1588,6 @@ 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 *)ivrs_base, ivrs_size);
@@ -1614,6 +1601,27 @@ free:
goto out;
}

+int 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;
--
1.7.9.5



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