Joshua Wise's Git repositories - netwatch.git/blame_incremental

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Commit	Line	Data
	1	/* pci-linux.c
	2	* Linux user-mode based PCI implementation
	3	* NetWatch system management mode administration console
	4	*
	5	* Copyright (c) 2008 Jacob Potter and Joshua Wise. All rights reserved.
	6	* This program is free software; you can redistribute and/or modify it under
	7	* the terms found in the file LICENSE in the root of this source tree.
	8	*
	9	*/
	10
	11	#include <sys/types.h>
	12	#include <sys/stat.h>
	13	#include <fcntl.h>
	14	#include <stdio.h>
	15	#include <inttypes.h>
	16
	17	#include "../include/pci.h"
	18
	19	static int _open(int bus, int slot, int fn)
	20	{
	21	char fname[512];
	22
	23	sprintf(fname, "/proc/bus/pci/%02x/%02x.%01x", bus, slot, fn);
	24	return open(fname, O_RDWR);
	25	}
	26
	27	void pci_write32(int bus, int slot, int fn, int addr, uint32_t data)
	28	{
	29	int fd;
	30
	31	fd = _open(bus, slot, fn);
	32	if (fd < 0)
	33	return;
	34	lseek(fd, addr, SEEK_SET);
	35	write(fd, &data, 4);
	36	close(fd);
	37	}
	38
	39	void pci_write16(int bus, int slot, int fn, int addr, uint16_t data)
	40	{
	41	int fd;
	42
	43	fd = _open(bus, slot, fn);
	44	if (fd < 0)
	45	return;
	46	lseek(fd, addr, SEEK_SET);
	47	write(fd, &data, 2);
	48	close(fd);
	49	}
	50
	51	void pci_write8(int bus, int slot, int fn, int addr, uint8_t data)
	52	{
	53	int fd;
	54
	55	fd = _open(bus, slot, fn);
	56	if (fd < 0)
	57	return;
	58	lseek(fd, addr, SEEK_SET);
	59	write(fd, &data, 1);
	60	close(fd);
	61	}
	62
	63	uint32_t pci_read32(int bus, int slot, int fn, int addr)
	64	{
	65	int fd;
	66	uint32_t data;
	67
	68	fd = _open(bus, slot, fn);
	69	if (fd < 0)
	70	return;
	71	lseek(fd, addr, SEEK_SET);
	72	read(fd, &data, 4);
	73	close(fd);
	74
	75	return data;
	76	}
	77
	78	uint16_t pci_read16(int bus, int slot, int fn, int addr)
	79	{
	80	int fd;
	81	uint16_t data;
	82
	83	fd = _open(bus, slot, fn);
	84	if (fd < 0)
	85	{
	86	perror("open");
	87	return;
	88	}
	89	lseek(fd, addr, SEEK_SET);
	90	read(fd, &data, 2);
	91	close(fd);
	92
	93	return data;
	94	}
	95
	96
	97	uint8_t pci_read8(int bus, int slot, int fn, int addr)
	98	{
	99	int fd;
	100	uint8_t data;
	101
	102	fd = _open(bus, slot, fn);
	103	if (fd < 0)
	104	{
	105	perror("open");
	106	return;
	107	}
	108	lseek(fd, addr, SEEK_SET);
	109	read(fd, &data, 1);
	110	close(fd);
	111
	112	return data;
	113	}