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Diffstat (limited to 'drivers/iommu/amd_iommu_init.c')
-rw-r--r--drivers/iommu/amd_iommu_init.c40
1 files changed, 31 insertions, 9 deletions
diff --git a/drivers/iommu/amd_iommu_init.c b/drivers/iommu/amd_iommu_init.c
index d536d24b6f34..fee872f666f5 100644
--- a/drivers/iommu/amd_iommu_init.c
+++ b/drivers/iommu/amd_iommu_init.c
@@ -1399,6 +1399,16 @@ static void init_device_table_dma(void)
}
}
+static void __init uninit_device_table_dma(void)
+{
+ u32 devid;
+
+ for (devid = 0; devid <= amd_iommu_last_bdf; ++devid) {
+ amd_iommu_dev_table[devid].data[0] = 0ULL;
+ amd_iommu_dev_table[devid].data[1] = 0ULL;
+ }
+}
+
static void init_device_table(void)
{
u32 devid;
@@ -1567,11 +1577,6 @@ static void __init free_on_init_error(void)
}
- amd_iommu_uninit_devices();
-
- free_pages((unsigned long)amd_iommu_pd_alloc_bitmap,
- get_order(MAX_DOMAIN_ID/8));
-
free_pages((unsigned long)amd_iommu_rlookup_table,
get_order(rlookup_table_size));
@@ -1583,8 +1588,6 @@ static void __init free_on_init_error(void)
free_iommu_all();
- free_unity_maps();
-
#ifdef CONFIG_GART_IOMMU
/*
* We failed to initialize the AMD IOMMU - try fallback to GART
@@ -1612,6 +1615,16 @@ static bool __init check_ioapic_information(void)
return true;
}
+static void __init free_dma_resources(void)
+{
+ amd_iommu_uninit_devices();
+
+ free_pages((unsigned long)amd_iommu_pd_alloc_bitmap,
+ get_order(MAX_DOMAIN_ID/8));
+
+ free_unity_maps();
+}
+
/*
* This is the hardware init function for AMD IOMMU in the system.
* This function is called either from amd_iommu_init or from the interrupt
@@ -1952,8 +1965,17 @@ static int __init amd_iommu_init(void)
ret = iommu_go_to_state(IOMMU_INITIALIZED);
if (ret) {
- disable_iommus();
- free_on_init_error();
+ free_dma_resources();
+ if (!irq_remapping_enabled) {
+ disable_iommus();
+ free_on_init_error();
+ } else {
+ struct amd_iommu *iommu;
+
+ uninit_device_table_dma();
+ for_each_iommu(iommu)
+ iommu_flush_all_caches(iommu);
+ }
}
return ret;