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/*
* (C) Copyright IBM Corporation 2006
* Copyright 2009 Red Hat, Inc.
* All Rights Reserved.
*
* Permission is hereby granted, free of charge, to any person obtaining a
* copy of this software and associated documentation files (the "Software"),
* to deal in the Software without restriction, including without limitation
* on the rights to use, copy, modify, merge, publish, distribute, sub
* license, and/or sell copies of the Software, and to permit persons to whom
* the Software is furnished to do so, subject to the following conditions:
*
* The above copyright notice and this permission notice (including the next
* paragraph) shall be included in all copies or substantial portions of the
* Software.
*
* THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
* IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
* FITNESS FOR A PARTICULAR PURPOSE AND NON-INFRINGEMENT. IN NO EVENT SHALL
* IBM AND/OR THEIR SUPPLIERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER
* LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING
* FROM, OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER
* DEALINGS IN THE SOFTWARE.
*/
/*
* Copyright (c) 2007 Paulo R. Zanoni, Tiago Vignatti
*
* Permission is hereby granted, free of charge, to any person
* obtaining a copy of this software and associated documentation
* files (the "Software"), to deal in the Software without
* restriction, including without limitation the rights to use,
* copy, modify, merge, publish, distribute, sublicense, and/or sell
* copies of the Software, and to permit persons to whom the
* Software is furnished to do so, subject to the following
* conditions:
*
* The above copyright notice and this permission notice shall be
* included in all copies or substantial portions of the Software.
*
* THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND,
* EXPRESS OR IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES
* OF MERCHANTABILITY, FITNESS FOR A PARTICULAR PURPOSE AND
* NONINFRINGEMENT. IN NO EVENT SHALL THE AUTHORS OR COPYRIGHT
* HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER LIABILITY,
* WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING
* FROM, OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR
* OTHER DEALINGS IN THE SOFTWARE.
*
*/
/**
* \file pciaccess.h
*
* \author Ian Romanick <idr@us.ibm.com>
*/
#ifndef PCIACCESS_H
#define PCIACCESS_H
#include <inttypes.h>
#if (__GNUC__ >= 3) || (__SUNPRO_C >= 0x5130)
#define __deprecated __attribute__((deprecated))
#else
#define __deprecated
#endif
typedef uint64_t pciaddr_t;
struct pci_device;
struct pci_device_iterator;
struct pci_id_match;
struct pci_slot_match;
#ifdef __cplusplus
extern "C" {
#endif
int pci_device_has_kernel_driver(struct pci_device *dev);
int pci_device_is_boot_vga(struct pci_device *dev);
int pci_device_read_rom(struct pci_device *dev, void *buffer);
int __deprecated pci_device_map_region(struct pci_device *dev,
unsigned region, int write_enable);
int __deprecated pci_device_unmap_region(struct pci_device *dev,
unsigned region);
int pci_device_map_range(struct pci_device *dev, pciaddr_t base,
pciaddr_t size, unsigned map_flags, void **addr);
int pci_device_unmap_range(struct pci_device *dev, void *memory,
pciaddr_t size);
int __deprecated pci_device_map_memory_range(struct pci_device *dev,
pciaddr_t base, pciaddr_t size, int write_enable, void **addr);
int __deprecated pci_device_unmap_memory_range(struct pci_device *dev,
void *memory, pciaddr_t size);
int pci_device_probe(struct pci_device *dev);
const struct pci_agp_info *pci_device_get_agp_info(struct pci_device *dev);
const struct pci_bridge_info *pci_device_get_bridge_info(
struct pci_device *dev);
const struct pci_pcmcia_bridge_info *pci_device_get_pcmcia_bridge_info(
struct pci_device *dev);
int pci_device_get_bridge_buses(struct pci_device *dev, int *primary_bus,
int *secondary_bus, int *subordinate_bus);
int pci_system_init(void);
void pci_system_init_dev_mem(int fd);
void pci_system_cleanup(void);
struct pci_device_iterator *pci_slot_match_iterator_create(
const struct pci_slot_match *match);
struct pci_device_iterator *pci_id_match_iterator_create(
const struct pci_id_match *match);
void pci_iterator_destroy(struct pci_device_iterator *iter);
struct pci_device *pci_device_next(struct pci_device_iterator *iter);
struct pci_device *pci_device_find_by_slot(uint32_t domain, uint32_t bus,
uint32_t dev, uint32_t func);
struct pci_device *pci_device_get_parent_bridge(struct pci_device *dev);
void pci_get_strings(const struct pci_id_match *m,
const char **device_name, const char **vendor_name,
const char **subdevice_name, const char **subvendor_name);
const char *pci_device_get_device_name(const struct pci_device *dev);
const char *pci_device_get_subdevice_name(const struct pci_device *dev);
const char *pci_device_get_vendor_name(const struct pci_device *dev);
const char *pci_device_get_subvendor_name(const struct pci_device *dev);
void pci_device_enable(struct pci_device *dev);
int pci_device_cfg_read (struct pci_device *dev, void *data,
pciaddr_t offset, pciaddr_t size, pciaddr_t *bytes_read);
int pci_device_cfg_read_u8 (struct pci_device *dev, uint8_t *data,
pciaddr_t offset);
int pci_device_cfg_read_u16(struct pci_device *dev, uint16_t *data,
pciaddr_t offset);
int pci_device_cfg_read_u32(struct pci_device *dev, uint32_t *data,
pciaddr_t offset);
int pci_device_cfg_write (struct pci_device *dev, const void *data,
pciaddr_t offset, pciaddr_t size, pciaddr_t *bytes_written);
int pci_device_cfg_write_u8 (struct pci_device *dev, uint8_t data,
pciaddr_t offset);
int pci_device_cfg_write_u16(struct pci_device *dev, uint16_t data,
pciaddr_t offset);
int pci_device_cfg_write_u32(struct pci_device *dev, uint32_t data,
pciaddr_t offset);
int pci_device_cfg_write_bits(struct pci_device *dev, uint32_t mask,
uint32_t data, pciaddr_t offset);
#ifdef __cplusplus
}
#endif
/**
* \name Mapping flags passed to \c pci_device_map_range
*/
/*@{*/
#define PCI_DEV_MAP_FLAG_WRITABLE (1U<<0)
#define PCI_DEV_MAP_FLAG_WRITE_COMBINE (1U<<1)
#define PCI_DEV_MAP_FLAG_CACHABLE (1U<<2)
/*@}*/
#define PCI_MATCH_ANY (~0U)
/**
* Compare two PCI ID values (either vendor or device). This is used
* internally to compare the fields of \c pci_id_match to the fields of
* \c pci_device.
*/
#define PCI_ID_COMPARE(a, b) \
(((a) == PCI_MATCH_ANY) || ((a) == (b)))
/**
*/
struct pci_id_match {
/**
* \name Device / vendor matching controls
*
* Control the search based on the device, vendor, subdevice, or subvendor
* IDs. Setting any of these fields to \c PCI_MATCH_ANY will cause the
* field to not be used in the comparison.
*/
/*@{*/
uint32_t vendor_id;
uint32_t device_id;
uint32_t subvendor_id;
uint32_t subdevice_id;
/*@}*/
/**
* \name Device class matching controls
*
*/
/*@{*/
uint32_t device_class;
uint32_t device_class_mask;
/*@}*/
intptr_t match_data;
};
/**
*/
struct pci_slot_match {
/**
* \name Device slot matching controls
*
* Control the search based on the domain, bus, slot, and function of
* the device. Setting any of these fields to \c PCI_MATCH_ANY will cause
* the field to not be used in the comparison.
*/
/*@{*/
uint32_t domain;
uint32_t bus;
uint32_t dev;
uint32_t func;
/*@}*/
intptr_t match_data;
};
/**
* BAR descriptor for a PCI device.
*/
struct pci_mem_region {
/**
* When the region is mapped, this is the pointer to the memory.
*
* This field is \b only set when the deprecated \c pci_device_map_region
* interface is used. Use \c pci_device_map_range instead.
*
* \deprecated
*/
void *memory;
/**
* Base physical address of the region within its bus / domain.
*
* \warning
* This address is really only useful to other devices in the same
* domain. It's probably \b not the address applications will ever
* use.
*
* \warning
* Most (all?) platform back-ends leave this field unset.
*/
pciaddr_t bus_addr;
/**
* Base physical address of the region from the CPU's point of view.
*
* This address is typically passed to \c pci_device_map_range to create
* a mapping of the region to the CPU's virtual address space.
*/
pciaddr_t base_addr;
/**
* Size, in bytes, of the region.
*/
pciaddr_t size;
/**
* Is the region I/O ports or memory?
*/
unsigned is_IO:1;
/**
* Is the memory region prefetchable?
*
* \note
* This can only be set if \c is_IO is not set.
*/
unsigned is_prefetchable:1;
/**
* Is the memory at a 64-bit address?
*
* \note
* This can only be set if \c is_IO is not set.
*/
unsigned is_64:1;
};
/**
* PCI device.
*
* Contains all of the information about a particular PCI device.
*/
struct pci_device {
/**
* \name Device bus identification.
*
* Complete bus identification, including domain, of the device. On
* platforms that do not support PCI domains (e.g., 32-bit x86 hardware),
* the domain will always be zero.
*/
/*@{*/
uint16_t domain;
uint8_t bus;
uint8_t dev;
uint8_t func;
/*@}*/
/**
* \name Vendor / device ID
*
* The vendor ID, device ID, and sub-IDs for the device.
*/
/*@{*/
uint16_t vendor_id;
uint16_t device_id;
uint16_t subvendor_id;
uint16_t subdevice_id;
/*@}*/
/**
* Device's class, subclass, and programming interface packed into a
* single 32-bit value. The class is at bits [23:16], subclass is at
* bits [15:8], and programming interface is at [7:0].
*/
uint32_t device_class;
/**
* Device revision number, as read from the configuration header.
*/
uint8_t revision;
/**
* BAR descriptors for the device.
*/
struct pci_mem_region regions[6];
/**
* Size, in bytes, of the device's expansion ROM.
*/
pciaddr_t rom_size;
/**
* IRQ associated with the device. If there is no IRQ, this value will
* be -1.
*/
int irq;
/**
* Storage for user data. Users of the library can store arbitrary
* data in this pointer. The library will not use it for any purpose.
* It is the user's responsability to free this memory before destroying
* the \c pci_device structure.
*/
intptr_t user_data;
/**
* Used by the VGA arbiter. Type of resource decoded by the device and
* the file descriptor (/dev/vga_arbiter). */
int vgaarb_rsrc;
};
/**
* Description of the AGP capability of the device.
*
* \sa pci_device_get_agp_info
*/
struct pci_agp_info {
/**
* Offset of the AGP registers in the devices configuration register
* space. This is generally used so that the offset of the AGP command
* register can be determined.
*/
unsigned config_offset;
/**
* \name AGP major / minor version.
*/
/*@{*/
uint8_t major_version;
uint8_t minor_version;
/*@}*/
/**
* Logical OR of the supported AGP rates. For example, a value of 0x07
* means that the device can support 1x, 2x, and 4x. A value of 0x0c
* means that the device can support 8x and 4x.
*/
uint8_t rates;
unsigned int fast_writes:1; /**< Are fast-writes supported? */
unsigned int addr64:1;
unsigned int htrans:1;
unsigned int gart64:1;
unsigned int coherent:1;
unsigned int sideband:1; /**< Is side-band addressing supported? */
unsigned int isochronus:1;
uint8_t async_req_size;
uint8_t calibration_cycle_timing;
uint8_t max_requests;
};
/**
* Description of a PCI-to-PCI bridge device.
*
* \sa pci_device_get_bridge_info
*/
struct pci_bridge_info {
uint8_t primary_bus;
uint8_t secondary_bus;
uint8_t subordinate_bus;
uint8_t secondary_latency_timer;
uint8_t io_type;
uint8_t mem_type;
uint8_t prefetch_mem_type;
uint16_t secondary_status;
uint16_t bridge_control;
uint32_t io_base;
uint32_t io_limit;
uint32_t mem_base;
uint32_t mem_limit;
uint64_t prefetch_mem_base;
uint64_t prefetch_mem_limit;
};
/**
* Description of a PCI-to-PCMCIA bridge device.
*
* \sa pci_device_get_pcmcia_bridge_info
*/
struct pci_pcmcia_bridge_info {
uint8_t primary_bus;
uint8_t card_bus;
uint8_t subordinate_bus;
uint8_t cardbus_latency_timer;
uint16_t secondary_status;
uint16_t bridge_control;
struct {
uint32_t base;
uint32_t limit;
} io[2];
struct {
uint32_t base;
uint32_t limit;
} mem[2];
};
/**
* VGA Arbiter definitions, functions and related.
*/
/* Legacy VGA regions */
#define VGA_ARB_RSRC_NONE 0x00
#define VGA_ARB_RSRC_LEGACY_IO 0x01
#define VGA_ARB_RSRC_LEGACY_MEM 0x02
/* Non-legacy access */
#define VGA_ARB_RSRC_NORMAL_IO 0x04
#define VGA_ARB_RSRC_NORMAL_MEM 0x08
int pci_device_vgaarb_init (void);
void pci_device_vgaarb_fini (void);
int pci_device_vgaarb_set_target (struct pci_device *dev);
/* use the targetted device */
int pci_device_vgaarb_decodes (int new_vga_rsrc);
int pci_device_vgaarb_lock (void);
int pci_device_vgaarb_trylock (void);
int pci_device_vgaarb_unlock (void);
/* return the current device count + resource decodes for the device */
int pci_device_vgaarb_get_info (struct pci_device *dev, int *vga_count, int *rsrc_decodes);
/*
* I/O space access.
*/
struct pci_io_handle;
struct pci_io_handle *pci_device_open_io(struct pci_device *dev, pciaddr_t base,
pciaddr_t size);
struct pci_io_handle *pci_legacy_open_io(struct pci_device *dev, pciaddr_t base,
pciaddr_t size);
void pci_device_close_io(struct pci_device *dev, struct pci_io_handle *handle);
uint32_t pci_io_read32(struct pci_io_handle *handle, uint32_t reg);
uint16_t pci_io_read16(struct pci_io_handle *handle, uint32_t reg);
uint8_t pci_io_read8(struct pci_io_handle *handle, uint32_t reg);
void pci_io_write32(struct pci_io_handle *handle, uint32_t reg, uint32_t data);
void pci_io_write16(struct pci_io_handle *handle, uint32_t reg, uint16_t data);
void pci_io_write8(struct pci_io_handle *handle, uint32_t reg, uint8_t data);
/*
* Legacy memory access
*/
int pci_device_map_legacy(struct pci_device *dev, pciaddr_t base,
pciaddr_t size, unsigned map_flags, void **addr);
int pci_device_unmap_legacy(struct pci_device *dev, void *addr, pciaddr_t size);
#endif /* PCIACCESS_H */