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
  33 struct 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
  50 static 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
  58 extern void set_pci_dma_ops(struct dma_map_ops *dma_ops);
  59 extern 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
  76 extern int pci_domain_nr(struct pci_bus *bus);
  77
  78 /* Decide whether to display the domain number in /proc */
  79 extern int pci_proc_domain(struct pci_bus *bus);
  80
  81 struct vm_area_struct;
  82 /* Map a range of PCI memory or I/O space for a device into user space */
  83 int 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
  89 extern int pci_legacy_read(struct pci_bus *bus, loff_t port, u32 *val,
  90                            size_t count);
  91 extern int pci_legacy_write(struct pci_bus *bus, loff_t port, u32 val,
  92                            size_t count);
  93 extern 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
 117 extern void pcibios_claim_one_bus(struct pci_bus *b);
 118
 119 extern void pcibios_finish_adding_to_bus(struct pci_bus *bus);
 120
 121 extern void pcibios_resource_survey(void);
 122
 123 extern struct pci_controller *init_phb_dynamic(struct device_node *dn);
 124 extern int remove_phb_dynamic(struct pci_controller *phb);
 125
 126 extern struct pci_dev *of_create_pci_dev(struct device_node *node,
 127                                         struct pci_bus *bus, int devfn);
 128
 129 extern void of_scan_pci_bridge(struct pci_dev *dev);
 130
 131 extern void of_scan_bus(struct device_node *node, struct pci_bus *bus);
 132 extern void of_rescan_bus(struct device_node *node, struct pci_bus *bus);
 133
 134 struct file;
 135 extern 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
 141 extern 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
 145 extern resource_size_t pcibios_io_space_offset(struct pci_controller *hose);
 146 extern void pcibios_setup_bus_devices(struct pci_bus *bus);
 147 extern void pcibios_setup_bus_self(struct pci_bus *bus);
 148 extern void pcibios_setup_phb_io_space(struct pci_controller *hose);
 149 extern void pcibios_scan_phb(struct pci_controller *hose);
 150
 151 #endif  /* __KERNEL__ */
 152 #endif /* __ASM_POWERPC_PCI_H */