powerpc: Merge pci.h

This involves some minor changes: a few unused functions that the
ppc32 pci.c provides are no longer declared here or exported;
pcibios_assign_all_busses now just refers to the pci_assign_all_buses
variable on both 32-bit and 64-bit; pcibios_scan_all_fns is now
just 0 instead of a function that always returns 0 on 64-bit.

Signed-off-by: Paul Mackerras <paulus@samba.org>

2 files changed, 82 insertions, 30 deletions

diff --git a/include/asm-ppc64/pci.h b/include/asm-powerpc/pci.h
index fafdf885a3cc..d5934a076bd0 100644
--- a/include/asm-ppc64/pci.h
+++ b/include/asm-powerpc/pci.h
@@ -1,5 +1,5 @@
-#ifndef __PPC64_PCI_H
-#define __PPC64_PCI_H
+#ifndef __ASM_POWERPC_PCI_H
+#define __ASM_POWERPC_PCI_H
 #ifdef __KERNEL__
 
 /*
@@ -18,6 +18,7 @@
 #include <asm/scatterlist.h>
 #include <asm/io.h>
 #include <asm/prom.h>
+#include <asm/pci-bridge.h>
 
 #include <asm-generic/pci-dma-compat.h>
 
@@ -26,11 +27,21 @@
 
 struct pci_dev;
 
-#ifdef CONFIG_PPC_ISERIES
+/* Values for the `which' argument to sys_pciconfig_iobase syscall.  */
+#define IOBASE_BRIDGE_NUMBER    0
+#define IOBASE_MEMORY           1
+#define IOBASE_IO               2
+#define IOBASE_ISA_IO           3
+#define IOBASE_ISA_MEM          4
+
+/*
+ * Set this to 1 if you want the kernel to re-assign all PCI
+ * bus numbers
+ */
+extern int pci_assign_all_buses;
+#define pcibios_assign_all_busses()     (pci_assign_all_buses)
+
 #define pcibios_scan_all_fns(a, b)      0
-#else
-extern int pcibios_scan_all_fns(struct pci_bus *bus, int devfn);
-#endif
 
 static inline void pcibios_set_master(struct pci_dev *dev)
 {
@@ -50,6 +61,7 @@ static inline int pci_get_legacy_ide_irq(struct pci_dev *dev, int channel)
         return channel ? 15 : 14;
 }
 
+#ifdef CONFIG_PPC64
 #define HAVE_ARCH_PCI_MWI 1
 static inline int pcibios_prep_mwi(struct pci_dev *dev)
 {
@@ -64,12 +76,10 @@ static inline int pcibios_prep_mwi(struct pci_dev *dev)
         return 0;
 }
 
-extern unsigned int pcibios_assign_all_busses(void);
-
 extern struct dma_mapping_ops pci_dma_ops;
 
 /* For DAC DMA, we currently don't support it by default, but
- * we let the platform override this
+ * we let 64-bit platforms override this.
  */
 static inline int pci_dac_dma_supported(struct pci_dev *hwdev,u64 mask)
 {
@@ -102,6 +112,35 @@ extern int pci_domain_nr(struct pci_bus *bus);
 /* Decide whether to display the domain number in /proc */
 extern int pci_proc_domain(struct pci_bus *bus);
 
+#else /* 32-bit */
+
+#ifdef CONFIG_PCI
+static inline void pci_dma_burst_advice(struct pci_dev *pdev,
+                                        enum pci_dma_burst_strategy *strat,
+                                        unsigned long *strategy_parameter)
+{
+        *strat = PCI_DMA_BURST_INFINITY;
+        *strategy_parameter = ~0UL;
+}
+#endif
+
+/*
+ * At present there are very few 32-bit PPC machines that can have
+ * memory above the 4GB point, and we don't support that.
+ */
+#define pci_dac_dma_supported(pci_dev, mask)    (0)
+
+/* Return the index of the PCI controller for device PDEV. */
+#define pci_domain_nr(bus) ((struct pci_controller *)(bus)->sysdata)->index
+
+/* Set the name of the bus as it appears in /proc/bus/pci */
+static inline int pci_proc_domain(struct pci_bus *bus)
+{
+        return 0;
+}
+
+#endif /* CONFIG_PPC64 */
+
 struct vm_area_struct;
 /* Map a range of PCI memory or I/O space for a device into user space */
 int pci_mmap_page_range(struct pci_dev *pdev, struct vm_area_struct *vma,
@@ -110,6 +149,7 @@ int pci_mmap_page_range(struct pci_dev *pdev, struct vm_area_struct *vma,
 /* Tell drivers/pci/proc.c that we have pci_mmap_page_range() */
 #define HAVE_PCI_MMAP   1
 
+#ifdef CONFIG_PPC64
 /* pci_unmap_{single,page} is not a nop, thus... */
 #define DECLARE_PCI_UNMAP_ADDR(ADDR_NAME)       \
         dma_addr_t ADDR_NAME;
@@ -124,22 +164,40 @@ int pci_mmap_page_range(struct pci_dev *pdev, struct vm_area_struct *vma,
 #define pci_unmap_len_set(PTR, LEN_NAME, VAL)           \
         (((PTR)->LEN_NAME) = (VAL))
 
-/* The PCI address space does equal the physical memory
- * address space.  The networking and block device layers use
+/* The PCI address space does not equal the physical memory address
+ * space (we have an IOMMU).  The IDE and SCSI device layers use
  * this boolean for bounce buffer decisions.
  */
 #define PCI_DMA_BUS_IS_PHYS     (0)
+
+#else /* 32-bit */
+
+/* The PCI address space does equal the physical memory
+ * address space (no IOMMU).  The IDE and SCSI device layers use
+ * this boolean for bounce buffer decisions.
+ */
+#define PCI_DMA_BUS_IS_PHYS     (1)
+
+/* pci_unmap_{page,single} is a nop so... */
+#define DECLARE_PCI_UNMAP_ADDR(ADDR_NAME)
+#define DECLARE_PCI_UNMAP_LEN(LEN_NAME)
+#define pci_unmap_addr(PTR, ADDR_NAME)          (0)
+#define pci_unmap_addr_set(PTR, ADDR_NAME, VAL) do { } while (0)
+#define pci_unmap_len(PTR, LEN_NAME)            (0)
+#define pci_unmap_len_set(PTR, LEN_NAME, VAL)   do { } while (0)
+
+#endif /* CONFIG_PPC64 */
         
-extern void
-pcibios_resource_to_bus(struct pci_dev *dev, struct pci_bus_region *region,
+extern void pcibios_resource_to_bus(struct pci_dev *dev,
+                        struct pci_bus_region *region,
                         struct resource *res);
 
-extern void
-pcibios_bus_to_resource(struct pci_dev *dev, struct resource *res,
+extern void pcibios_bus_to_resource(struct pci_dev *dev,
+                        struct resource *res,
                         struct pci_bus_region *region);
 
-static inline struct resource *
-pcibios_select_root(struct pci_dev *pdev, struct resource *res)
+static inline struct resource *pcibios_select_root(struct pci_dev *pdev,
+                        struct resource *res)
 {
         struct resource *root = NULL;
 
@@ -151,14 +209,12 @@ pcibios_select_root(struct pci_dev *pdev, struct resource *res)
         return root;
 }
 
-extern int
-unmap_bus_range(struct pci_bus *bus);
+extern int unmap_bus_range(struct pci_bus *bus);
 
-extern int
-remap_bus_range(struct pci_bus *bus);
+extern int remap_bus_range(struct pci_bus *bus);
 
-extern void
-pcibios_fixup_device_resources(struct pci_dev *dev, struct pci_bus *bus);
+extern void pcibios_fixup_device_resources(struct pci_dev *dev,
+                        struct pci_bus *bus);
 
 extern struct pci_controller *init_phb_dynamic(struct device_node *dn);
 
@@ -180,14 +236,12 @@ extern pgprot_t	pci_phys_mem_access_prot(struct file *file,
                                          unsigned long size,
                                          pgprot_t prot);
 
-#ifdef CONFIG_PPC_MULTIPLATFORM
+#if defined(CONFIG_PPC_MULTIPLATFORM) || defined(CONFIG_PPC32)
 #define HAVE_ARCH_PCI_RESOURCE_TO_USER
 extern void pci_resource_to_user(const struct pci_dev *dev, int bar,
                                  const struct resource *rsrc,
                                  u64 *start, u64 *end);
-#endif /* CONFIG_PPC_MULTIPLATFORM */
-
+#endif /* CONFIG_PPC_MULTIPLATFORM || CONFIG_PPC32 */
 
 #endif  /* __KERNEL__ */
-
-#endif /* __PPC64_PCI_H */
+#endif /* __ASM_POWERPC_PCI_H */
diff --git a/include/asm-powerpc/ppc-pci.h b/include/asm-powerpc/ppc-pci.h
index 2e36e5a7f4f3..36cdc869e580 100644
--- a/include/asm-powerpc/ppc-pci.h
+++ b/include/asm-powerpc/ppc-pci.h
@@ -48,8 +48,6 @@ extern void pSeries_final_fixup(void);
 extern void pSeries_irq_bus_setup(struct pci_bus *bus);
 
 extern unsigned long pci_probe_only;
-extern unsigned long pci_assign_all_buses;
-extern int pci_read_irq_line(struct pci_dev *pci_dev);
 
 /* ---- EEH internal-use-only related routines ---- */
 #ifdef CONFIG_EEH