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/*
8139too.c: A RealTek RTL-8139 Fast Ethernet driver for Linux.
Maintained by Jeff Garzik <jgarzik@pobox.com>
Copyright 2000-2002 Jeff Garzik
Much code comes from Donald Becker's rtl8139.c driver,
versions 1.13 and older. This driver was originally based
on rtl8139.c version 1.07. Header of rtl8139.c version 1.13:
-----<snip>-----
Written 1997-2001 by Donald Becker.
This software may be used and distributed according to the
terms of the GNU General Public License (GPL), incorporated
herein by reference. Drivers based on or derived from this
code fall under the GPL and must retain the authorship,
copyright and license notice. This file is not a complete
program and may only be used when the entire operating
system is licensed under the GPL.
This driver is for boards based on the RTL8129 and RTL8139
PCI ethernet chips.
The author may be reached as becker@scyld.com, or C/O Scyld
Computing Corporation 410 Severn Ave., Suite 210 Annapolis
MD 21403
Support and updates available at
http://www.scyld.com/network/rtl8139.html
Twister-tuning table provided by Kinston
<shangh@realtek.com.tw>.
-----<snip>-----
This software may be used and distributed according to the terms
of the GNU General Public License, incorporated herein by reference.
Contributors:
Donald Becker - he wrote the original driver, kudos to him!
(but please don't e-mail him for support, this isn't his driver)
Tigran Aivazian - bug fixes, skbuff free cleanup
Martin Mares - suggestions for PCI cleanup
David S. Miller - PCI DMA and softnet updates
Ernst Gill - fixes ported from BSD driver
Daniel Kobras - identified specific locations of
posted MMIO write bugginess
Gerard Sharp - bug fix, testing and feedback
David Ford - Rx ring wrap fix
Dan DeMaggio - swapped RTL8139 cards with me, and allowed me
to find and fix a crucial bug on older chipsets.
Donald Becker/Chris Butterworth/Marcus Westergren -
Noticed various Rx packet size-related buglets.
Santiago Garcia Mantinan - testing and feedback
Jens David - 2.2.x kernel backports
Martin Dennett - incredibly helpful insight on undocumented
features of the 8139 chips
Jean-Jacques Michel - bug fix
Tobias Ringström - Rx interrupt status checking suggestion
Andrew Morton - Clear blocked signals, avoid
buffer overrun setting current->comm.
Kalle Olavi Niemitalo - Wake-on-LAN ioctls
Robert Kuebel - Save kernel thread from dying on any signal.
Submitting bug reports:
"rtl8139-diag -mmmaaavvveefN" output
enable RTL8139_DEBUG below, and look at 'dmesg' or kernel log
*/
#define DRV_NAME "8139too"
#define DRV_VERSION "0.9.28"
#include <linux/module.h>
#include <linux/kernel.h>
#include <linux/compiler.h>
#include <linux/pci.h>
#include <linux/init.h>
#include <linux/netdevice.h>
#include <linux/etherdevice.h>
#include <linux/rtnetlink.h>
#include <linux/delay.h>
#include <linux/ethtool.h>
#include <linux/mii.h>
#include <linux/completion.h>
#include <linux/crc32.h>
#include <linux/io.h>
#include <linux/uaccess.h>
#include <asm/irq.h>
#define RTL8139_DRIVER_NAME DRV_NAME " Fast Ethernet driver " DRV_VERSION
#define PFX DRV_NAME ": "
/* Default Message level */
#define RTL8139_DEF_MSG_ENABLE (NETIF_MSG_DRV | \
NETIF_MSG_PROBE | \
NETIF_MSG_LINK)
/* define to 1, 2 or 3 to enable copious debugging info */
#define RTL8139_DEBUG 0
/* define to 1 to disable lightweight runtime debugging checks */
#undef RTL8139_NDEBUG
#if RTL8139_DEBUG
# define DPRINTK(fmt, args...) printk(KERN_DEBUG "%s: " fmt, __func__ , ## args)
#else
# define DPRINTK(fmt, args...)
#endif
#ifdef RTL8139_NDEBUG
# define assert(expr) do {} while (0)
#else
# define assert(expr) \
if(unlikely(!(expr))) { \
printk(KERN_ERR "Assertion failed! %s,%s,%s,line=%d\n", \
}
#endif
/* A few user-configurable values. */
/* media options */
#define MAX_UNITS 8
static int media[MAX_UNITS] = {-1, -1, -1, -1, -1, -1, -1, -1};
static int full_duplex[MAX_UNITS] = {-1, -1, -1, -1, -1, -1, -1, -1};
/* Whether to use MMIO or PIO. Default to MMIO. */
#ifdef CONFIG_8139TOO_PIO
static int use_io = 1;
#else
static int use_io = 0;
#endif
/* Maximum number of multicast addresses to filter (vs. Rx-all-multicast).
The RTL chips use a 64 element hash table based on the Ethernet CRC. */
static int multicast_filter_limit = 32;
/* bitmapped message enable number */
static int debug = -1;
/*
* Receive ring size
* Warning: 64K ring has hardware issues and may lock up.
*/
#if defined(CONFIG_SH_DREAMCAST)
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#else
#define RX_BUF_IDX 2 /* 32K ring */
#endif
#define RX_BUF_LEN (8192 << RX_BUF_IDX)
#define RX_BUF_PAD 16
#define RX_BUF_WRAP_PAD 2048 /* spare padding to handle lack of packet wrap */
#if RX_BUF_LEN == 65536
#define RX_BUF_TOT_LEN RX_BUF_LEN
#else
#define RX_BUF_TOT_LEN (RX_BUF_LEN + RX_BUF_PAD + RX_BUF_WRAP_PAD)
#endif
/* Number of Tx descriptor registers. */
#define NUM_TX_DESC 4
/* max supported ethernet frame size -- must be at least (dev->mtu+14+4).*/
#define MAX_ETH_FRAME_SIZE 1536
/* Size of the Tx bounce buffers -- must be at least (dev->mtu+14+4). */
#define TX_BUF_SIZE MAX_ETH_FRAME_SIZE
#define TX_BUF_TOT_LEN (TX_BUF_SIZE * NUM_TX_DESC)
/* PCI Tuning Parameters
Threshold is bytes transferred to chip before transmission starts. */
#define TX_FIFO_THRESH 256 /* In bytes, rounded down to 32 byte units. */
/* The following settings are log_2(bytes)-4: 0 == 16 bytes .. 6==1024, 7==end of packet. */
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