[PATCH] ppc64: don't build virtual IO drivers for PowerMac

Only compile vio.c on iSeries and pSeries, since other PPC64 platforms
(PowerMac) don't use virtual IO.  The resulting #ifdefs in dma.c are kind
of ugly, but at least contained, and I can't see a nicer way of doing it
for the time being.
Signed-off-by: David Gibson <david@gibson.dropbear.id.au>
Signed-off-by: Andrew Morton <akpm@osdl.org>
Signed-off-by: Linus Torvalds <torvalds@osdl.org>

arch/ppc64/Kconfig

@@ -110,6 +110,11 @@ config PPC_SPLPAR
 	  processors, that is, which share physical processors between
 	  two or more partitions.
 
+config IBMVIO
+	depends on PPC_PSERIES || PPC_ISERIES
+	bool
+	default y
+
 config U3_DART
 	bool 
 	depends on PPC_MULTIPLATFORM

arch/ppc64/kernel/Makefile

@@ -11,7 +11,7 @@ obj-y               :=	setup.o entry.o traps.o irq.o idle.o dma.o \
 			udbg.o binfmt_elf32.o sys_ppc32.o ioctl32.o \
 			ptrace32.o signal32.o rtc.o init_task.o \
 			lmb.o cputable.o cpu_setup_power4.o idle_power4.o \
-			iommu.o sysfs.o vio.o
+			iommu.o sysfs.o
 
 obj-$(CONFIG_PPC_OF) +=	of_device.o
 
@@ -45,6 +45,7 @@ obj-$(CONFIG_LPARCFG)		+= lparcfg.o
 obj-$(CONFIG_HVC_CONSOLE)	+= hvconsole.o
 obj-$(CONFIG_BOOTX_TEXT)	+= btext.o
 obj-$(CONFIG_HVCS)		+= hvcserver.o
+obj-$(CONFIG_IBMVIO)		+= vio.o
 
 obj-$(CONFIG_PPC_PMAC)		+= pmac_setup.o pmac_feature.o pmac_pci.o \
 				   pmac_time.o pmac_nvram.o pmac_low_i2c.o

arch/ppc64/kernel/dma.c

@@ -17,8 +17,10 @@ int dma_supported(struct device *dev, u64 mask)
 {
 	if (dev->bus == &pci_bus_type)
 		return pci_dma_supported(to_pci_dev(dev), mask);
+#ifdef CONFIG_IBMVIO
 	if (dev->bus == &vio_bus_type)
 		return vio_dma_supported(to_vio_dev(dev), mask);
+#endif /* CONFIG_IBMVIO */
 	BUG();
 	return 0;
 }
@@ -28,8 +30,10 @@ int dma_set_mask(struct device *dev, u64 dma_mask)
 {
 	if (dev->bus == &pci_bus_type)
 		return pci_set_dma_mask(to_pci_dev(dev), dma_mask);
+#ifdef CONFIG_IBMVIO
 	if (dev->bus == &vio_bus_type)
 		return vio_set_dma_mask(to_vio_dev(dev), dma_mask);
+#endif /* CONFIG_IBMVIO */
 	BUG();
 	return 0;
 }
@@ -40,8 +44,10 @@ void *dma_alloc_coherent(struct device *dev, size_t size,
 {
 	if (dev->bus == &pci_bus_type)
 		return pci_alloc_consistent(to_pci_dev(dev), size, dma_handle);
+#ifdef CONFIG_IBMVIO
 	if (dev->bus == &vio_bus_type)
 		return vio_alloc_consistent(to_vio_dev(dev), size, dma_handle);
+#endif /* CONFIG_IBMVIO */
 	BUG();
 	return NULL;
 }
@@ -52,8 +58,10 @@ void dma_free_coherent(struct device *dev, size_t size, void *cpu_addr,
 {
 	if (dev->bus == &pci_bus_type)
 		pci_free_consistent(to_pci_dev(dev), size, cpu_addr, dma_handle);
+#ifdef CONFIG_IBMVIO
 	else if (dev->bus == &vio_bus_type)
 		vio_free_consistent(to_vio_dev(dev), size, cpu_addr, dma_handle);
+#endif /* CONFIG_IBMVIO */
 	else
 		BUG();
 }
@@ -64,8 +72,10 @@ dma_addr_t dma_map_single(struct device *dev, void *cpu_addr, size_t size,
 {
 	if (dev->bus == &pci_bus_type)
 		return pci_map_single(to_pci_dev(dev), cpu_addr, size, (int)direction);
+#ifdef CONFIG_IBMVIO
 	if (dev->bus == &vio_bus_type)
 		return vio_map_single(to_vio_dev(dev), cpu_addr, size, direction);
+#endif /* CONFIG_IBMVIO */
 	BUG();
 	return (dma_addr_t)0;
 }
@@ -76,8 +86,10 @@ void dma_unmap_single(struct device *dev, dma_addr_t dma_addr, size_t size,
 {
 	if (dev->bus == &pci_bus_type)
 		pci_unmap_single(to_pci_dev(dev), dma_addr, size, (int)direction);
+#ifdef CONFIG_IBMVIO
 	else if (dev->bus == &vio_bus_type)
 		vio_unmap_single(to_vio_dev(dev), dma_addr, size, direction);
+#endif /* CONFIG_IBMVIO */
 	else
 		BUG();
 }
@@ -89,8 +101,10 @@ dma_addr_t dma_map_page(struct device *dev, struct page *page,
 {
 	if (dev->bus == &pci_bus_type)
 		return pci_map_page(to_pci_dev(dev), page, offset, size, (int)direction);
+#ifdef CONFIG_IBMVIO
 	if (dev->bus == &vio_bus_type)
 		return vio_map_page(to_vio_dev(dev), page, offset, size, direction);
+#endif /* CONFIG_IBMVIO */
 	BUG();
 	return (dma_addr_t)0;
 }
@@ -101,8 +115,10 @@ void dma_unmap_page(struct device *dev, dma_addr_t dma_address, size_t size,
 {
 	if (dev->bus == &pci_bus_type)
 		pci_unmap_page(to_pci_dev(dev), dma_address, size, (int)direction);
+#ifdef CONFIG_IBMVIO
 	else if (dev->bus == &vio_bus_type)
 		vio_unmap_page(to_vio_dev(dev), dma_address, size, direction);
+#endif /* CONFIG_IBMVIO */
 	else
 		BUG();
 }
@@ -113,8 +129,10 @@ int dma_map_sg(struct device *dev, struct scatterlist *sg, int nents,
 {
 	if (dev->bus == &pci_bus_type)
 		return pci_map_sg(to_pci_dev(dev), sg, nents, (int)direction);
+#ifdef CONFIG_IBMVIO
 	if (dev->bus == &vio_bus_type)
 		return vio_map_sg(to_vio_dev(dev), sg, nents, direction);
+#endif /* CONFIG_IBMVIO */
 	BUG();
 	return 0;
 }
@@ -125,8 +143,10 @@ void dma_unmap_sg(struct device *dev, struct scatterlist *sg, int nhwentries,
 {
 	if (dev->bus == &pci_bus_type)
 		pci_unmap_sg(to_pci_dev(dev), sg, nhwentries, (int)direction);
+#ifdef CONFIG_IBMVIO
 	else if (dev->bus == &vio_bus_type)
 		vio_unmap_sg(to_vio_dev(dev), sg, nhwentries, direction);
+#endif /* CONFIG_IBMVIO */
 	else
 		BUG();
 }