x86: Use x86_platform for iommu_shutdown
This patch cleans up pci_iommu_shutdown() a bit to use
x86_platform (similar to how IA64 initializes an IOMMU driver).
This adds iommu_shutdown() to x86_platform to avoid calling
every IOMMUs' shutdown functions in pci_iommu_shutdown() in
order. The IOMMU shutdown functions are platform specific (we
don't have multiple different IOMMU hardware) so the current way
is pointless.
An IOMMU driver sets x86_platform.iommu_shutdown to the shutdown
function if necessary.
Signed-off-by: FUJITA Tomonori <fujita.tomonori@lab.ntt.co.jp>
Cc: joerg.roedel@amd.com
LKML-Reference: <20091027163358F.fujita.tomonori@lab.ntt.co.jp>
Signed-off-by: Ingo Molnar <mingo@elte.hu>
diff --git a/arch/x86/kernel/pci-gart_64.c b/arch/x86/kernel/pci-gart_64.c
index a7f1b64..a9bcdf7 100644
--- a/arch/x86/kernel/pci-gart_64.c
+++ b/arch/x86/kernel/pci-gart_64.c
@@ -39,6 +39,7 @@
#include <asm/swiotlb.h>
#include <asm/dma.h>
#include <asm/k8.h>
+#include <asm/x86_init.h>
static unsigned long iommu_bus_base; /* GART remapping area (physical) */
static unsigned long iommu_size; /* size of remapping area bytes */
@@ -688,12 +689,12 @@
.free_coherent = gart_free_coherent,
};
-void gart_iommu_shutdown(void)
+static void gart_iommu_shutdown(void)
{
struct pci_dev *dev;
int i;
- if (no_agp && (dma_ops != &gart_dma_ops))
+ if (no_agp)
return;
for (i = 0; i < num_k8_northbridges; i++) {
@@ -838,6 +839,7 @@
flush_gart();
dma_ops = &gart_dma_ops;
+ x86_platform.iommu_shutdown = gart_iommu_shutdown;
}
void __init gart_parse_options(char *p)
