Merge branch 'master' of git://git.kernel.org/pub/scm/linux/kernel/git/paulus/powerpc

[sfrench/cifs-2.6.git] / include / asm-powerpc / pci.h

diff --git a/include/asm-powerpc/pci.h b/include/asm-powerpc/pci.h
index 16f13319c7693fbb55cea896bab704885ebd4357..ce0f13e8eb141d6bc65aedd9aadd92a204d8c577 100644 (file)
--- a/include/asm-powerpc/pci.h
+++ b/include/asm-powerpc/pci.h
@@ -70,19 +70,22 @@ static inline int pci_get_legacy_ide_irq(struct pci_dev *dev, int channel)
  */
 #define PCI_DISABLE_MWI
 
-extern struct dma_mapping_ops *pci_dma_ops;
+#ifdef CONFIG_PCI
+extern void set_pci_dma_ops(struct dma_mapping_ops *dma_ops);
+extern struct dma_mapping_ops *get_pci_dma_ops(void);
 
 /* For DAC DMA, we currently don't support it by default, but
  * we let 64-bit platforms override this.
  */
 static inline int pci_dac_dma_supported(struct pci_dev *hwdev,u64 mask)
 {
-       if (pci_dma_ops && pci_dma_ops->dac_dma_supported)
-               return pci_dma_ops->dac_dma_supported(&hwdev->dev, mask);
+       struct dma_mapping_ops *d = get_pci_dma_ops();
+
+       if (d && d->dac_dma_supported)
+               return d->dac_dma_supported(&hwdev->dev, mask);
        return 0;
 }
 
-#ifdef CONFIG_PCI
 static inline void pci_dma_burst_advice(struct pci_dev *pdev,
                                        enum pci_dma_burst_strategy *strat,
                                        unsigned long *strategy_parameter)
@@ -99,6 +102,9 @@ static inline void pci_dma_burst_advice(struct pci_dev *pdev,
        *strat = PCI_DMA_BURST_MULTIPLE;
        *strategy_parameter = cacheline_size;
 }
+#else  /* CONFIG_PCI */
+#define set_pci_dma_ops(d)
+#define get_pci_dma_ops()      NULL
 #endif
 
 extern int pci_domain_nr(struct pci_bus *bus);
@@ -143,8 +149,13 @@ 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... */
+#if defined(CONFIG_PPC64) || defined(CONFIG_NOT_COHERENT_CACHE)
+/*
+ * For 64-bit kernels, pci_unmap_{single,page} is not a nop.
+ * For 32-bit non-coherent kernels, pci_dma_sync_single_for_cpu() and
+ * so on are not nops.
+ * and thus...
+ */
 #define DECLARE_PCI_UNMAP_ADDR(ADDR_NAME)      \
        dma_addr_t ADDR_NAME;
 #define DECLARE_PCI_UNMAP_LEN(LEN_NAME)                \
@@ -158,6 +169,20 @@ 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))
 
+#else /* 32-bit && coherent */
+
+/* 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 || CONFIG_NOT_COHERENT_CACHE */
+
+#ifdef CONFIG_PPC64
+
 /* 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.
@@ -172,16 +197,8 @@ int pci_mmap_page_range(struct pci_dev *pdev, struct vm_area_struct *vma,
  */
 #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,
                        struct resource *res);