LXR linux/arch/powerpc/include/asm/pci.h

   1#ifndef __ASM_POWERPC_PCI_H
   2#define __ASM_POWERPC_PCI_H
   3#ifdef __KERNEL__
   4
   5/*
   6 * This program is free software; you can redistribute it and/or
   7 * modify it under the terms of the GNU General Public License
   8 * as published by the Free Software Foundation; either version
   9 * 2 of the License, or (at your option) any later version.
  10 */
  11
  12#include <linux/types.h>
  13#include <linux/slab.h>
  14#include <linux/string.h>
  15#include <linux/dma-mapping.h>
  16#include <linux/scatterlist.h>
  17
  18#include <asm/machdep.h>
  19#include <asm/io.h>
  20#include <asm/prom.h>
  21#include <asm/pci-bridge.h>
  22
  23#include <asm-generic/pci-dma-compat.h>
  24
  25/* Return values for pci_controller_ops.probe_mode function */
  26#define PCI_PROBE_NONE          -1      /* Don't look at this bus at all */
  27#define PCI_PROBE_NORMAL        0       /* Do normal PCI probing */
  28#define PCI_PROBE_DEVTREE       1       /* Instantiate from device tree */
  29
  30#define PCIBIOS_MIN_IO          0x1000
  31#define PCIBIOS_MIN_MEM         0x10000000
  32
  33struct pci_dev;
  34
  35/* Values for the `which' argument to sys_pciconfig_iobase syscall.  */
  36#define IOBASE_BRIDGE_NUMBER    0
  37#define IOBASE_MEMORY           1
  38#define IOBASE_IO               2
  39#define IOBASE_ISA_IO           3
  40#define IOBASE_ISA_MEM          4
  41
  42/*
  43 * Set this to 1 if you want the kernel to re-assign all PCI
  44 * bus numbers (don't do that on ppc64 yet !)
  45 */
  46#define pcibios_assign_all_busses() \
  47        (pci_has_flag(PCI_REASSIGN_ALL_BUS))
  48
  49#define HAVE_ARCH_PCI_GET_LEGACY_IDE_IRQ
  50static inline int pci_get_legacy_ide_irq(struct pci_dev *dev, int channel)
  51{
  52        if (ppc_md.pci_get_legacy_ide_irq)
  53                return ppc_md.pci_get_legacy_ide_irq(dev, channel);
  54        return channel ? 15 : 14;
  55}
  56
  57#ifdef CONFIG_PCI
  58extern void set_pci_dma_ops(struct dma_map_ops *dma_ops);
  59extern struct dma_map_ops *get_pci_dma_ops(void);
  60#else   /* CONFIG_PCI */
  61#define set_pci_dma_ops(d)
  62#define get_pci_dma_ops()       NULL
  63#endif
  64
  65#ifdef CONFIG_PPC64
  66
  67/*
  68 * We want to avoid touching the cacheline size or MWI bit.
  69 * pSeries firmware sets the cacheline size (which is not the cpu cacheline
  70 * size in all cases) and hardware treats MWI the same as memory write.
  71 */
  72#define PCI_DISABLE_MWI
  73
  74#endif /* CONFIG_PPC64 */
  75
  76extern int pci_domain_nr(struct pci_bus *bus);
  77
  78/* Decide whether to display the domain number in /proc */
  79extern int pci_proc_domain(struct pci_bus *bus);
  80
  81struct vm_area_struct;
  82/* Map a range of PCI memory or I/O space for a device into user space */
  83int pci_mmap_page_range(struct pci_dev *pdev, struct vm_area_struct *vma,
  84                        enum pci_mmap_state mmap_state, int write_combine);
  85
  86/* Tell drivers/pci/proc.c that we have pci_mmap_page_range() */
  87#define HAVE_PCI_MMAP   1
  88
  89extern int pci_legacy_read(struct pci_bus *bus, loff_t port, u32 *val,
  90                           size_t count);
  91extern int pci_legacy_write(struct pci_bus *bus, loff_t port, u32 val,
  92                           size_t count);
  93extern int pci_mmap_legacy_page_range(struct pci_bus *bus,
  94                                      struct vm_area_struct *vma,
  95                                      enum pci_mmap_state mmap_state);
  96
  97#define HAVE_PCI_LEGACY 1
  98
  99#ifdef CONFIG_PPC64
 100
 101/* The PCI address space does not equal the physical memory address
 102 * space (we have an IOMMU).  The IDE and SCSI device layers use
 103 * this boolean for bounce buffer decisions.
 104 */
 105#define PCI_DMA_BUS_IS_PHYS     (0)
 106
 107#else /* 32-bit */
 108
 109/* The PCI address space does equal the physical memory
 110 * address space (no IOMMU).  The IDE and SCSI device layers use
 111 * this boolean for bounce buffer decisions.
 112 */
 113#define PCI_DMA_BUS_IS_PHYS     (1)
 114
 115#endif /* CONFIG_PPC64 */
 116
 117extern void pcibios_claim_one_bus(struct pci_bus *b);
 118
 119extern void pcibios_finish_adding_to_bus(struct pci_bus *bus);
 120
 121extern void pcibios_resource_survey(void);
 122
 123extern struct pci_controller *init_phb_dynamic(struct device_node *dn);
 124extern int remove_phb_dynamic(struct pci_controller *phb);
 125
 126extern struct pci_dev *of_create_pci_dev(struct device_node *node,
 127                                        struct pci_bus *bus, int devfn);
 128
 129extern void of_scan_pci_bridge(struct pci_dev *dev);
 130
 131extern void of_scan_bus(struct device_node *node, struct pci_bus *bus);
 132extern void of_rescan_bus(struct device_node *node, struct pci_bus *bus);
 133
 134struct file;
 135extern pgprot_t pci_phys_mem_access_prot(struct file *file,
 136                                         unsigned long pfn,
 137                                         unsigned long size,
 138                                         pgprot_t prot);
 139
 140#define HAVE_ARCH_PCI_RESOURCE_TO_USER
 141extern void pci_resource_to_user(const struct pci_dev *dev, int bar,
 142                                 const struct resource *rsrc,
 143                                 resource_size_t *start, resource_size_t *end);
 144
 145extern resource_size_t pcibios_io_space_offset(struct pci_controller *hose);
 146extern void pcibios_setup_bus_devices(struct pci_bus *bus);
 147extern void pcibios_setup_bus_self(struct pci_bus *bus);
 148extern void pcibios_setup_phb_io_space(struct pci_controller *hose);
 149extern void pcibios_scan_phb(struct pci_controller *hose);
 150
 151#endif  /* __KERNEL__ */
 152#endif /* __ASM_POWERPC_PCI_H */
 153