x86-64: introduce struct pci_sysdata to facilitate sharing of ->sysdata

This patch introduces struct pci_sysdata to x86 and x86-64, and
converts the existing two users (NUMA, Calgary) to use it.

This lays the groundwork for having other users of sysdata, such as
the PCI domains work.

The Calgary bits are tested, the NUMA bits just look ok.

Signed-off-by: Jeff Garzik <jeff@garzik.org>
Signed-off-by: Muli Ben-Yehuda <muli@il.ibm.com>
Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>

2 files changed, 20 insertions, 1 deletions

diff --git a/include/asm-x86_64/pci.h b/include/asm-x86_64/pci.h
index bda94fd5176f..88926eb44f5c 100644
--- a/include/asm-x86_64/pci.h
+++ b/include/asm-x86_64/pci.h
@@ -5,6 +5,25 @@
 
 #ifdef __KERNEL__
 
+struct pci_sysdata {
+        int             node;           /* NUMA node */
+        void*           iommu;          /* IOMMU private data */
+};
+
+#ifdef CONFIG_CALGARY_IOMMU
+static inline void* pci_iommu(struct pci_bus *bus)
+{
+        struct pci_sysdata *sd = bus->sysdata;
+        return sd->iommu;
+}
+
+static inline void set_pci_iommu(struct pci_bus *bus, void *val)
+{
+        struct pci_sysdata *sd = bus->sysdata;
+        sd->iommu = val;
+}
+#endif /* CONFIG_CALGARY_IOMMU */
+
 #include <linux/mm.h> /* for struct page */
 
 /* Can be used to override the logic in pci_scan_bus for skipping
diff --git a/include/asm-x86_64/topology.h b/include/asm-x86_64/topology.h
index 4fd6fb23953e..36e52fba7960 100644
--- a/include/asm-x86_64/topology.h
+++ b/include/asm-x86_64/topology.h
@@ -22,7 +22,7 @@ extern int __node_distance(int, int);
 #define parent_node(node)               (node)
 #define node_to_first_cpu(node)         (first_cpu(node_to_cpumask[node]))
 #define node_to_cpumask(node)           (node_to_cpumask[node])
-#define pcibus_to_node(bus)             ((long)(bus->sysdata))  
+#define pcibus_to_node(bus)     ((struct pci_sysdata *)((bus)->sysdata))->node
 #define pcibus_to_cpumask(bus)          node_to_cpumask(pcibus_to_node(bus));
 
 #define numa_node_id()                  read_pda(nodenumber)