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

   1/* SPDX-License-Identifier: GPL-2.0 */
   2#ifndef __ALPHA_PCI_H
   3#define __ALPHA_PCI_H
   4
   5#ifdef __KERNEL__
   6
   7#include <linux/spinlock.h>
   8#include <linux/dma-mapping.h>
   9#include <linux/scatterlist.h>
  10#include <asm/machvec.h>
  11
  12/*
  13 * The following structure is used to manage multiple PCI busses.
  14 */
  15
  16struct pci_dev;
  17struct pci_bus;
  18struct resource;
  19struct pci_iommu_arena;
  20struct page;
  21
  22/* A controller.  Used to manage multiple PCI busses.  */
  23
  24struct pci_controller {
  25        struct pci_controller *next;
  26        struct pci_bus *bus;
  27        struct resource *io_space;
  28        struct resource *mem_space;
  29
  30        /* The following are for reporting to userland.  The invariant is
  31           that if we report a BWX-capable dense memory, we do not report
  32           a sparse memory at all, even if it exists.  */
  33        unsigned long sparse_mem_base;
  34        unsigned long dense_mem_base;
  35        unsigned long sparse_io_base;
  36        unsigned long dense_io_base;
  37
  38        /* This one's for the kernel only.  It's in KSEG somewhere.  */
  39        unsigned long config_space_base;
  40
  41        unsigned int index;
  42        /* For compatibility with current (as of July 2003) pciutils
  43           and XFree86. Eventually will be removed. */
  44        unsigned int need_domain_info;
  45
  46        struct pci_iommu_arena *sg_pci;
  47        struct pci_iommu_arena *sg_isa;
  48
  49        void *sysdata;
  50};
  51
  52/* Override the logic in pci_scan_bus for skipping already-configured
  53   bus numbers.  */
  54
  55#define pcibios_assign_all_busses()     1
  56
  57#define PCIBIOS_MIN_IO          alpha_mv.min_io_address
  58#define PCIBIOS_MIN_MEM         alpha_mv.min_mem_address
  59
  60extern void pcibios_set_master(struct pci_dev *dev);
  61
  62/* IOMMU controls.  */
  63
  64/* The PCI address space does not equal the physical memory address space.
  65   The networking and block device layers use this boolean for bounce buffer
  66   decisions.  */
  67#define PCI_DMA_BUS_IS_PHYS  0
  68
  69/* TODO: integrate with include/asm-generic/pci.h ? */
  70static inline int pci_get_legacy_ide_irq(struct pci_dev *dev, int channel)
  71{
  72        return channel ? 15 : 14;
  73}
  74
  75#define pci_domain_nr(bus) ((struct pci_controller *)(bus)->sysdata)->index
  76
  77static inline int pci_proc_domain(struct pci_bus *bus)
  78{
  79        struct pci_controller *hose = bus->sysdata;
  80        return hose->need_domain_info;
  81}
  82
  83#endif /* __KERNEL__ */
  84
  85/* Values for the `which' argument to sys_pciconfig_iobase.  */
  86#define IOBASE_HOSE             0
  87#define IOBASE_SPARSE_MEM       1
  88#define IOBASE_DENSE_MEM        2
  89#define IOBASE_SPARSE_IO        3
  90#define IOBASE_DENSE_IO         4
  91#define IOBASE_ROOT_BUS         5
  92#define IOBASE_FROM_HOSE        0x10000
  93
  94extern struct pci_dev *isa_bridge;
  95
  96extern int pci_legacy_read(struct pci_bus *bus, loff_t port, u32 *val,
  97                           size_t count);
  98extern int pci_legacy_write(struct pci_bus *bus, loff_t port, u32 val,
  99                            size_t count);
 100extern int pci_mmap_legacy_page_range(struct pci_bus *bus,
 101                                      struct vm_area_struct *vma,
 102                                      enum pci_mmap_state mmap_state);
 103extern void pci_adjust_legacy_attr(struct pci_bus *bus,
 104                                   enum pci_mmap_state mmap_type);
 105#define HAVE_PCI_LEGACY 1
 106
 107extern int pci_create_resource_files(struct pci_dev *dev);
 108extern void pci_remove_resource_files(struct pci_dev *dev);
 109
 110#endif /* __ALPHA_PCI_H */
 111