lib/pci.h

   1 /*
   2  *      The PCI Library
   3  *
   4  *      Copyright (c) 1997--2002 Martin Mares <mj@ucw.cz>
   5  *
   6  *      Can be freely distributed and used under the terms of the GNU GPL.
   7  */
   8
   9 #ifndef _PCI_LIB_H
  10 #define _PCI_LIB_H
  11
  12 #include "config.h"
  13 #include "header.h"
  14
  15 /*
  16  *      Types
  17  */
  18
  19 #ifdef OS_LINUX
  20 #include <linux/types.h>
  21
  22 typedef __u8 byte;
  23 typedef __u8 u8;
  24 typedef __u16 word;
  25 typedef __u16 u16;
  26 typedef __u32 u32;
  27 #endif
  28
  29 #ifdef OS_FREEBSD
  30 #include <sys/types.h>
  31
  32 typedef u_int8_t byte;
  33 typedef u_int8_t u8;
  34 typedef u_int16_t word;
  35 typedef u_int16_t u16;
  36 typedef u_int32_t u32;
  37 #endif
  38
  39 #ifdef OS_NETBSD
  40 #include <sys/types.h>
  41
  42 typedef u_int8_t byte;
  43 typedef u_int8_t u8;
  44 typedef u_int16_t word;
  45 typedef u_int16_t u16;
  46 typedef u_int32_t u32;
  47 #endif
  48
  49 #ifdef OS_AIX
  50 #include <sys/param.h>
  51
  52 typedef u_int8_t byte;
  53 typedef u_int8_t u8;
  54 typedef u_int16_t word;
  55 typedef u_int16_t u16;
  56 typedef u_int32_t u32;
  57 #endif
  58
  59 #ifdef HAVE_LONG_ADDRESS
  60 typedef unsigned long long pciaddr_t;
  61 #else
  62 typedef unsigned long pciaddr_t;
  63 #endif
  64
  65 /*
  66  *      PCI Access Structure
  67  */
  68
  69 struct pci_methods;
  70 struct nl_entry;
  71
  72 enum pci_access_type {
  73   /* Known access methods, remember to update access.c as well */
  74   PCI_ACCESS_AUTO,                      /* Autodetection (params: none) */
  75   PCI_ACCESS_PROC_BUS_PCI,              /* Linux /proc/bus/pci (params: path) */
  76   PCI_ACCESS_I386_TYPE1,                /* i386 ports, type 1 (params: none) */
  77   PCI_ACCESS_I386_TYPE2,                /* i386 ports, type 2 (params: none) */
  78   PCI_ACCESS_FBSD_DEVICE,               /* FreeBSD /dev/pci (params: path) */
  79   PCI_ACCESS_AIX_DEVICE,                /* /dev/pci0, /dev/bus0, etc. */
  80   PCI_ACCESS_NBSD_LIBPCI,               /* NetBSD libpci */
  81   PCI_ACCESS_DUMP,                      /* Dump file (params: filename) */
  82   PCI_ACCESS_MAX
  83 };
  84
  85 struct pci_access {
  86   /* Options you can change: */
  87   unsigned int method;                  /* Access method */
  88   char *method_params[PCI_ACCESS_MAX];  /* Parameters for the methods */
  89   int writeable;                        /* Open in read/write mode */
  90   int buscentric;                       /* Bus-centric view of the world */
  91   char *id_file_name;                   /* Name of ID list file */
  92   int numeric_ids;                      /* Don't resolve device IDs to names */
  93   int debugging;                        /* Turn on debugging messages */
  94
  95   /* Functions you can override: */
  96   void (*error)(char *msg, ...);        /* Write error message and quit */
  97   void (*warning)(char *msg, ...);      /* Write a warning message */
  98   void (*debug)(char *msg, ...);        /* Write a debugging message */
  99
 100   struct pci_dev *devices;              /* Devices found on this bus */
 101
 102   /* Fields used internally: */
 103   struct pci_methods *methods;
 104   char *nl_list;                        /* Name list cache */
 105   struct nl_entry **nl_hash;
 106   int fd;                               /* proc: fd */
 107   int fd_rw;                            /* proc: fd opened read-write */
 108   struct pci_dev *cached_dev;           /* proc: device the fd is for */
 109   int fd_pos;                           /* proc: current position */
 110 };
 111
 112 /* Initialize PCI access */
 113 struct pci_access *pci_alloc(void);
 114 void pci_init(struct pci_access *);
 115 void pci_cleanup(struct pci_access *);
 116
 117 /* Scanning of devices */
 118 void pci_scan_bus(struct pci_access *acc);
 119 struct pci_dev *pci_get_dev(struct pci_access *acc, int bus, int dev, int func); /* Raw access to specified device */
 120 void pci_free_dev(struct pci_dev *);
 121
 122 /*
 123  *      Devices
 124  */
 125
 126 struct pci_dev {
 127   struct pci_dev *next;                 /* Next device in the chain */
 128   word bus;                             /* Higher byte can select host bridges */
 129   byte dev, func;                       /* Device and function */
 130
 131   /* These fields are set by pci_fill_info() */
 132   int known_fields;                     /* Set of info fields already known */
 133   word vendor_id, device_id;            /* Identity of the device */
 134   int irq;                              /* IRQ number */
 135   pciaddr_t base_addr[6];               /* Base addresses */
 136   pciaddr_t size[6];                    /* Region sizes */
 137   pciaddr_t rom_base_addr;              /* Expansion ROM base address */
 138   pciaddr_t rom_size;                   /* Expansion ROM size */
 139
 140   /* Fields used internally: */
 141   struct pci_access *access;
 142   struct pci_methods *methods;
 143   byte *cache;                          /* Cached information */
 144   int cache_len;
 145   int hdrtype;                          /* Direct methods: header type */
 146   void *aux;                            /* Auxillary data */
 147 };
 148
 149 #define PCI_ADDR_IO_MASK (~(pciaddr_t) 0x3)
 150 #define PCI_ADDR_MEM_MASK (~(pciaddr_t) 0xf)
 151
 152 byte pci_read_byte(struct pci_dev *, int pos); /* Access to configuration space */
 153 word pci_read_word(struct pci_dev *, int pos);
 154 u32  pci_read_long(struct pci_dev *, int pos);
 155 int pci_read_block(struct pci_dev *, int pos, byte *buf, int len);
 156 int pci_write_byte(struct pci_dev *, int pos, byte data);
 157 int pci_write_word(struct pci_dev *, int pos, word data);
 158 int pci_write_long(struct pci_dev *, int pos, u32 data);
 159 int pci_write_block(struct pci_dev *, int pos, byte *buf, int len);
 160
 161 int pci_fill_info(struct pci_dev *, int flags); /* Fill in device information */
 162
 163 #define PCI_FILL_IDENT          1
 164 #define PCI_FILL_IRQ            2
 165 #define PCI_FILL_BASES          4
 166 #define PCI_FILL_ROM_BASE       8
 167 #define PCI_FILL_SIZES          16
 168 #define PCI_FILL_RESCAN         0x10000
 169
 170 void pci_setup_cache(struct pci_dev *, byte *cache, int len);
 171
 172 /*
 173  *      Filters
 174  */
 175
 176 struct pci_filter {
 177   int bus, slot, func;                  /* -1 = ANY */
 178   int vendor, device;
 179 };
 180
 181 void pci_filter_init(struct pci_access *, struct pci_filter *);
 182 char *pci_filter_parse_slot(struct pci_filter *, char *);
 183 char *pci_filter_parse_id(struct pci_filter *, char *);
 184 int pci_filter_match(struct pci_filter *, struct pci_dev *);
 185
 186 /*
 187  *      Device names
 188  */
 189
 190 char *pci_lookup_name(struct pci_access *a, char *buf, int size, int flags, u32 arg1, u32 arg2, u32 arg3, u32 arg4);
 191 void pci_free_name_list(struct pci_access *a);
 192
 193 #define PCI_LOOKUP_VENDOR 1
 194 #define PCI_LOOKUP_DEVICE 2
 195 #define PCI_LOOKUP_CLASS 4
 196 #define PCI_LOOKUP_SUBSYSTEM 8
 197 #define PCI_LOOKUP_PROGIF 16
 198 #define PCI_LOOKUP_NUMERIC 0x10000
 199
 200 #endif