/* 8390.c: A general NS8390 ethernet driver core for linux. */
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/* 8390.c: A general NS8390 ethernet driver core for linux. */
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/*
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/*
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Written 1992-94 by Donald Becker.
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Written 1992-94 by Donald Becker.
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Copyright 1993 United States Government as represented by the
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Copyright 1993 United States Government as represented by the
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Director, National Security Agency.
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Director, National Security Agency.
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This software may be used and distributed according to the terms
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This software may be used and distributed according to the terms
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of the GNU Public License, incorporated herein by reference.
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of the GNU Public License, incorporated herein by reference.
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The author may be reached as becker@CESDIS.gsfc.nasa.gov, or C/O
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The author may be reached as becker@CESDIS.gsfc.nasa.gov, or C/O
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Center of Excellence in Space Data and Information Sciences
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Center of Excellence in Space Data and Information Sciences
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Code 930.5, Goddard Space Flight Center, Greenbelt MD 20771
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Code 930.5, Goddard Space Flight Center, Greenbelt MD 20771
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This is the chip-specific code for many 8390-based ethernet adaptors.
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This is the chip-specific code for many 8390-based ethernet adaptors.
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This is not a complete driver, it must be combined with board-specific
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This is not a complete driver, it must be combined with board-specific
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code such as ne.c, wd.c, 3c503.c, etc.
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code such as ne.c, wd.c, 3c503.c, etc.
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Seeing how at least eight drivers use this code, (not counting the
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Seeing how at least eight drivers use this code, (not counting the
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PCMCIA ones either) it is easy to break some card by what seems like
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PCMCIA ones either) it is easy to break some card by what seems like
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a simple innocent change. Please contact me or Donald if you think
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a simple innocent change. Please contact me or Donald if you think
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you have found something that needs changing. -- PG
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you have found something that needs changing. -- PG
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Changelog:
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Changelog:
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Paul Gortmaker : remove set_bit lock, other cleanups.
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Paul Gortmaker : remove set_bit lock, other cleanups.
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Paul Gortmaker : add ei_get_8390_hdr() so we can pass skb's to
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Paul Gortmaker : add ei_get_8390_hdr() so we can pass skb's to
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ei_block_input() for eth_io_copy_and_sum().
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ei_block_input() for eth_io_copy_and_sum().
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Paul Gortmaker : exchange static int ei_pingpong for a #define,
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Paul Gortmaker : exchange static int ei_pingpong for a #define,
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also add better Tx error handling.
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also add better Tx error handling.
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Paul Gortmaker : rewrite Rx overrun handling as per NS specs.
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Paul Gortmaker : rewrite Rx overrun handling as per NS specs.
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Greg Ungerer : added some coldfire addressing code.
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Greg Ungerer : added some coldfire addressing code.
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Sources:
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Sources:
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The National Semiconductor LAN Databook, and the 3Com 3c503 databook.
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The National Semiconductor LAN Databook, and the 3Com 3c503 databook.
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*/
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*/
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static const char *version =
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static const char *version =
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"8390.c:v1.10 9/23/94 Donald Becker (becker@cesdis.gsfc.nasa.gov)\n";
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"8390.c:v1.10 9/23/94 Donald Becker (becker@cesdis.gsfc.nasa.gov)\n";
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#include <linux/module.h>
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#include <linux/module.h>
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#include <linux/kernel.h>
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#include <linux/kernel.h>
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#include <linux/sched.h>
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#include <linux/sched.h>
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#include <linux/fs.h>
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#include <linux/fs.h>
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#include <linux/types.h>
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#include <linux/types.h>
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#include <linux/ptrace.h>
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#include <linux/ptrace.h>
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#include <linux/string.h>
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#include <linux/string.h>
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#include <asm/system.h>
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#include <asm/system.h>
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#include <asm/segment.h>
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#include <asm/segment.h>
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#include <asm/bitops.h>
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#include <asm/bitops.h>
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#include <asm/io.h>
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#include <asm/io.h>
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#include <linux/errno.h>
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#include <linux/errno.h>
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#include <linux/fcntl.h>
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#include <linux/fcntl.h>
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#include <linux/in.h>
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#include <linux/in.h>
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#include <linux/interrupt.h>
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#include <linux/interrupt.h>
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#include <linux/netdevice.h>
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#include <linux/netdevice.h>
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#include <linux/etherdevice.h>
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#include <linux/etherdevice.h>
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#include "8390.h"
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#include "8390.h"
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#ifdef CONFIG_COLDFIRE
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#ifdef CONFIG_COLDFIRE
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#ifdef CONFIG_NETtel
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#ifdef CONFIG_NETtel
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#include <asm/nettel.h>
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#include <asm/nettel.h>
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int ethernet_tick = 0;
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int ethernet_tick = 0;
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#endif
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#endif
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#include <asm/mcfne.h>
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#include <asm/mcfne.h>
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#endif /* CONFIG_COLDFIRE */
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#endif /* CONFIG_COLDFIRE */
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#ifdef CONFIG_MCF_MPEGBOARD
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#ifdef CONFIG_MCF_MPEGBOARD
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#include <board/pport.h>
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#include <board/pport.h>
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#include <asm/coldfire.h>
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#include <asm/coldfire.h>
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#endif
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#endif
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/* These are the operational function interfaces to board-specific
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/* These are the operational function interfaces to board-specific
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routines.
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routines.
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void reset_8390(struct device *dev)
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void reset_8390(struct device *dev)
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Resets the board associated with DEV, including a hardware reset of
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Resets the board associated with DEV, including a hardware reset of
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the 8390. This is only called when there is a transmit timeout, and
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the 8390. This is only called when there is a transmit timeout, and
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it is always followed by 8390_init().
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it is always followed by 8390_init().
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void block_output(struct device *dev, int count, const unsigned char *buf,
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void block_output(struct device *dev, int count, const unsigned char *buf,
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int start_page)
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int start_page)
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Write the COUNT bytes of BUF to the packet buffer at START_PAGE. The
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Write the COUNT bytes of BUF to the packet buffer at START_PAGE. The
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"page" value uses the 8390's 256-byte pages.
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"page" value uses the 8390's 256-byte pages.
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void get_8390_hdr(struct device *dev, struct e8390_hdr *hdr, int ring_page)
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void get_8390_hdr(struct device *dev, struct e8390_hdr *hdr, int ring_page)
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Read the 4 byte, page aligned 8390 header. *If* there is a
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Read the 4 byte, page aligned 8390 header. *If* there is a
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subsequent read, it will be of the rest of the packet.
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subsequent read, it will be of the rest of the packet.
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void block_input(struct device *dev, int count, struct sk_buff *skb, int ring_offset)
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void block_input(struct device *dev, int count, struct sk_buff *skb, int ring_offset)
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Read COUNT bytes from the packet buffer into the skb data area. Start
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Read COUNT bytes from the packet buffer into the skb data area. Start
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reading from RING_OFFSET, the address as the 8390 sees it. This will always
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reading from RING_OFFSET, the address as the 8390 sees it. This will always
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follow the read of the 8390 header.
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follow the read of the 8390 header.
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*/
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*/
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#define ei_reset_8390 (ei_local->reset_8390)
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#define ei_reset_8390 (ei_local->reset_8390)
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#define ei_block_output (ei_local->block_output)
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#define ei_block_output (ei_local->block_output)
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#define ei_block_input (ei_local->block_input)
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#define ei_block_input (ei_local->block_input)
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#define ei_get_8390_hdr (ei_local->get_8390_hdr)
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#define ei_get_8390_hdr (ei_local->get_8390_hdr)
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/* use 0 for production, 1 for verification, >2 for debug */
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/* use 0 for production, 1 for verification, >2 for debug */
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#ifdef EI_DEBUG
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#ifdef EI_DEBUG
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int ei_debug = EI_DEBUG;
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int ei_debug = EI_DEBUG;
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#else
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#else
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int ei_debug = 1;
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int ei_debug = 1;
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#endif
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#endif
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/* Index to functions. */
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/* Index to functions. */
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static void ei_tx_intr(struct device *dev);
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static void ei_tx_intr(struct device *dev);
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static void ei_tx_err(struct device *dev);
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static void ei_tx_err(struct device *dev);
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static void ei_receive(struct device *dev);
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static void ei_receive(struct device *dev);
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static void ei_rx_overrun(struct device *dev);
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static void ei_rx_overrun(struct device *dev);
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/* Routines generic to NS8390-based boards. */
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/* Routines generic to NS8390-based boards. */
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static void NS8390_trigger_send(struct device *dev, unsigned int length,
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static void NS8390_trigger_send(struct device *dev, unsigned int length,
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int start_page);
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int start_page);
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static void set_multicast_list(struct device *dev);
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static void set_multicast_list(struct device *dev);
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/* Open/initialize the board. This routine goes all-out, setting everything
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/* Open/initialize the board. This routine goes all-out, setting everything
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up anew at each open, even though many of these registers should only
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up anew at each open, even though many of these registers should only
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need to be set once at boot.
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need to be set once at boot.
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*/
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*/
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int ei_open(struct device *dev)
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int ei_open(struct device *dev)
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{
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{
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struct ei_device *ei_local = (struct ei_device *) dev->priv;
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struct ei_device *ei_local = (struct ei_device *) dev->priv;
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/* This can't happen unless somebody forgot to call ethdev_init(). */
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/* This can't happen unless somebody forgot to call ethdev_init(). */
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if (ei_local == NULL) {
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if (ei_local == NULL) {
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printk(KERN_EMERG "%s: ei_open passed a non-existent device!\n", dev->name);
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printk(KERN_EMERG "%s: ei_open passed a non-existent device!\n", dev->name);
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return -ENXIO;
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return -ENXIO;
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}
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}
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irq2dev_map[dev->irq] = dev;
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irq2dev_map[dev->irq] = dev;
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NS8390_init(dev, 1);
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NS8390_init(dev, 1);
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dev->start = 1;
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dev->start = 1;
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ei_local->irqlock = 0;
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ei_local->irqlock = 0;
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return 0;
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return 0;
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}
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}
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/* Opposite of above. Only used when "ifconfig <devname> down" is done. */
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/* Opposite of above. Only used when "ifconfig <devname> down" is done. */
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int ei_close(struct device *dev)
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int ei_close(struct device *dev)
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{
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{
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NS8390_init(dev, 0);
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NS8390_init(dev, 0);
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dev->start = 0;
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dev->start = 0;
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return 0;
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return 0;
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}
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}
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static int ei_start_xmit(struct sk_buff *skb, struct device *dev)
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static int ei_start_xmit(struct sk_buff *skb, struct device *dev)
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{
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{
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int e8390_base = dev->base_addr;
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int e8390_base = dev->base_addr;
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struct ei_device *ei_local = (struct ei_device *) dev->priv;
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struct ei_device *ei_local = (struct ei_device *) dev->priv;
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int length, send_length, output_page;
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int length, send_length, output_page;
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int i;
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int i;
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int flags;
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int flags;
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/*
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/*
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* We normally shouldn't be called if dev->tbusy is set, but the
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* We normally shouldn't be called if dev->tbusy is set, but the
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* existing code does anyway. If it has been too long since the
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* existing code does anyway. If it has been too long since the
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* last Tx, we assume the board has died and kick it.
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* last Tx, we assume the board has died and kick it.
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*/
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*/
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if (dev->tbusy) { /* Do timeouts, just like the 8003 driver. */
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if (dev->tbusy) { /* Do timeouts, just like the 8003 driver. */
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int txsr = inb(e8390_base+EN0_TSR), isr;
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int txsr = inb(e8390_base+EN0_TSR), isr;
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int tickssofar = jiffies - dev->trans_start;
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int tickssofar = jiffies - dev->trans_start;
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if (tickssofar < TX_TIMEOUT || (tickssofar < (TX_TIMEOUT+5) && ! (txsr & ENTSR_PTX))) {
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if (tickssofar < TX_TIMEOUT || (tickssofar < (TX_TIMEOUT+5) && ! (txsr & ENTSR_PTX))) {
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return 1;
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return 1;
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}
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}
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isr = inb(e8390_base+EN0_ISR);
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isr = inb(e8390_base+EN0_ISR);
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if (dev->start == 0) {
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if (dev->start == 0) {
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printk("%s: xmit on stopped card\n", dev->name);
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printk("%s: xmit on stopped card\n", dev->name);
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return 1;
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return 1;
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}
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}
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/*
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/*
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* Note that if the Tx posted a TX_ERR interrupt, then the
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* Note that if the Tx posted a TX_ERR interrupt, then the
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* error will have been handled from the interrupt handler.
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* error will have been handled from the interrupt handler.
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* and not here.
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* and not here.
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*/
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*/
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printk(KERN_DEBUG "%s: Tx timed out, %s TSR=%#2x, ISR=%#2x, t=%d.\n",
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printk(KERN_DEBUG "%s: Tx timed out, %s TSR=%#2x, ISR=%#2x, t=%d.\n",
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dev->name, (txsr & ENTSR_ABT) ? "excess collisions." :
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dev->name, (txsr & ENTSR_ABT) ? "excess collisions." :
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(isr) ? "lost interrupt?" : "cable problem?", txsr, isr, tickssofar);
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(isr) ? "lost interrupt?" : "cable problem?", txsr, isr, tickssofar);
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if (!isr && !ei_local->stat.tx_packets) {
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if (!isr && !ei_local->stat.tx_packets) {
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/* The 8390 probably hasn't gotten on the cable yet. */
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/* The 8390 probably hasn't gotten on the cable yet. */
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ei_local->interface_num ^= 1; /* Try a different xcvr. */
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ei_local->interface_num ^= 1; /* Try a different xcvr. */
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}
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}
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/* Try to restart the card. Perhaps the user has fixed something. */
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/* Try to restart the card. Perhaps the user has fixed something. */
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ei_reset_8390(dev);
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ei_reset_8390(dev);
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NS8390_init(dev, 1);
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NS8390_init(dev, 1);
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dev->trans_start = jiffies;
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dev->trans_start = jiffies;
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}
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}
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/* Sending a NULL skb means some higher layer thinks we've missed an
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/* Sending a NULL skb means some higher layer thinks we've missed an
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tx-done interrupt. Caution: dev_tint() handles the cli()/sti()
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tx-done interrupt. Caution: dev_tint() handles the cli()/sti()
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itself. */
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itself. */
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if (skb == NULL) {
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if (skb == NULL) {
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dev_tint(dev);
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dev_tint(dev);
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return 0;
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return 0;
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}
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}
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length = skb->len;
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length = skb->len;
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if (skb->len <= 0)
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if (skb->len <= 0)
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return 0;
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return 0;
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/* Mask interrupts from the ethercard. */
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/* Mask interrupts from the ethercard. */
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save_flags(flags);
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save_flags(flags);
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cli();
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cli();
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outb_p(0x00, e8390_base + EN0_IMR);
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outb_p(0x00, e8390_base + EN0_IMR);
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restore_flags(flags);
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restore_flags(flags);
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if (dev->interrupt) {
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if (dev->interrupt) {
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printk("%s: Tx request while isr active.\n",dev->name);
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printk("%s: Tx request while isr active.\n",dev->name);
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outb_p(ENISR_ALL, e8390_base + EN0_IMR);
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outb_p(ENISR_ALL, e8390_base + EN0_IMR);
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return 1;
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return 1;
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}
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}
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ei_local->irqlock = 1;
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ei_local->irqlock = 1;
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send_length = ETH_ZLEN < length ? length : ETH_ZLEN;
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send_length = ETH_ZLEN < length ? length : ETH_ZLEN;
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#ifdef EI_PINGPONG
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#ifdef EI_PINGPONG
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/*
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/*
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* We have two Tx slots available for use. Find the first free
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* We have two Tx slots available for use. Find the first free
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* slot, and then perform some sanity checks. With two Tx bufs,
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* slot, and then perform some sanity checks. With two Tx bufs,
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* you get very close to transmitting back-to-back packets. With
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* you get very close to transmitting back-to-back packets. With
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* only one Tx buf, the transmitter sits idle while you reload the
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* only one Tx buf, the transmitter sits idle while you reload the
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* card, leaving a substantial gap between each transmitted packet.
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* card, leaving a substantial gap between each transmitted packet.
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*/
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*/
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if (ei_local->tx1 == 0) {
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if (ei_local->tx1 == 0) {
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output_page = ei_local->tx_start_page;
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output_page = ei_local->tx_start_page;
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ei_local->tx1 = send_length;
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ei_local->tx1 = send_length;
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if (ei_debug && ei_local->tx2 > 0)
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if (ei_debug && ei_local->tx2 > 0)
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printk("%s: idle transmitter tx2=%d, lasttx=%d, txing=%d.\n",
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printk("%s: idle transmitter tx2=%d, lasttx=%d, txing=%d.\n",
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dev->name, ei_local->tx2, ei_local->lasttx, ei_local->txing);
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dev->name, ei_local->tx2, ei_local->lasttx, ei_local->txing);
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} else if (ei_local->tx2 == 0) {
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} else if (ei_local->tx2 == 0) {
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output_page = ei_local->tx_start_page + TX_1X_PAGES;
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output_page = ei_local->tx_start_page + TX_1X_PAGES;
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ei_local->tx2 = send_length;
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ei_local->tx2 = send_length;
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if (ei_debug && ei_local->tx1 > 0)
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if (ei_debug && ei_local->tx1 > 0)
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printk("%s: idle transmitter, tx1=%d, lasttx=%d, txing=%d.\n",
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printk("%s: idle transmitter, tx1=%d, lasttx=%d, txing=%d.\n",
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dev->name, ei_local->tx1, ei_local->lasttx, ei_local->txing);
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dev->name, ei_local->tx1, ei_local->lasttx, ei_local->txing);
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} else { /* We should never get here. */
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} else { /* We should never get here. */
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if (ei_debug)
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if (ei_debug)
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printk("%s: No Tx buffers free! irq=%d tx1=%d tx2=%d last=%d\n",
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printk("%s: No Tx buffers free! irq=%d tx1=%d tx2=%d last=%d\n",
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dev->name, dev->interrupt, ei_local->tx1, ei_local->tx2, ei_local->lasttx);
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dev->name, dev->interrupt, ei_local->tx1, ei_local->tx2, ei_local->lasttx);
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ei_local->irqlock = 0;
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ei_local->irqlock = 0;
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dev->tbusy = 1;
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dev->tbusy = 1;
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outb_p(ENISR_ALL, e8390_base + EN0_IMR);
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outb_p(ENISR_ALL, e8390_base + EN0_IMR);
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return 1;
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return 1;
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}
|
}
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|
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/*
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/*
|
* Okay, now upload the packet and trigger a send if the transmitter
|
* Okay, now upload the packet and trigger a send if the transmitter
|
* isn't already sending. If it is busy, the interrupt handler will
|
* isn't already sending. If it is busy, the interrupt handler will
|
* trigger the send later, upon receiving a Tx done interrupt.
|
* trigger the send later, upon receiving a Tx done interrupt.
|
*/
|
*/
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|
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ei_block_output(dev, length, skb->data, output_page);
|
ei_block_output(dev, length, skb->data, output_page);
|
if (! ei_local->txing) {
|
if (! ei_local->txing) {
|
ei_local->txing = 1;
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ei_local->txing = 1;
|
NS8390_trigger_send(dev, send_length, output_page);
|
NS8390_trigger_send(dev, send_length, output_page);
|
dev->trans_start = jiffies;
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dev->trans_start = jiffies;
|
if (output_page == ei_local->tx_start_page) {
|
if (output_page == ei_local->tx_start_page) {
|
ei_local->tx1 = -1;
|
ei_local->tx1 = -1;
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ei_local->lasttx = -1;
|
ei_local->lasttx = -1;
|
} else {
|
} else {
|
ei_local->tx2 = -1;
|
ei_local->tx2 = -1;
|
ei_local->lasttx = -2;
|
ei_local->lasttx = -2;
|
}
|
}
|
} else
|
} else
|
ei_local->txqueue++;
|
ei_local->txqueue++;
|
|
|
dev->tbusy = (ei_local->tx1 && ei_local->tx2);
|
dev->tbusy = (ei_local->tx1 && ei_local->tx2);
|
|
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#else /* EI_PINGPONG */
|
#else /* EI_PINGPONG */
|
|
|
/*
|
/*
|
* Only one Tx buffer in use. You need two Tx bufs to come close to
|
* Only one Tx buffer in use. You need two Tx bufs to come close to
|
* back-to-back transmits. Expect a 20 -> 25% performance hit on
|
* back-to-back transmits. Expect a 20 -> 25% performance hit on
|
* reasonable hardware if you only use one Tx buffer.
|
* reasonable hardware if you only use one Tx buffer.
|
*/
|
*/
|
|
|
ei_block_output(dev, length, skb->data, ei_local->tx_start_page);
|
ei_block_output(dev, length, skb->data, ei_local->tx_start_page);
|
ei_local->txing = 1;
|
ei_local->txing = 1;
|
NS8390_trigger_send(dev, send_length, ei_local->tx_start_page);
|
NS8390_trigger_send(dev, send_length, ei_local->tx_start_page);
|
dev->trans_start = jiffies;
|
dev->trans_start = jiffies;
|
dev->tbusy = 1;
|
dev->tbusy = 1;
|
|
|
#endif /* EI_PINGPONG */
|
#endif /* EI_PINGPONG */
|
|
|
/* Turn 8390 interrupts back on. */
|
/* Turn 8390 interrupts back on. */
|
ei_local->irqlock = 0;
|
ei_local->irqlock = 0;
|
outb_p(ENISR_ALL, e8390_base + EN0_IMR);
|
outb_p(ENISR_ALL, e8390_base + EN0_IMR);
|
#ifdef CONFIG_MCF_MPEGBOARD
|
#ifdef CONFIG_MCF_MPEGBOARD
|
if(!skb->send_control)
|
if(!skb->send_control)
|
dev_kfree_skb (skb, FREE_WRITE);
|
dev_kfree_skb (skb, FREE_WRITE);
|
else
|
else
|
skb_device_unlock(skb);
|
skb_device_unlock(skb);
|
#else
|
#else
|
dev_kfree_skb (skb, FREE_WRITE);
|
dev_kfree_skb (skb, FREE_WRITE);
|
#endif
|
#endif
|
return 0;
|
return 0;
|
}
|
}
|
|
|
/* The typical workload of the driver:
|
/* The typical workload of the driver:
|
Handle the ether interface interrupts. */
|
Handle the ether interface interrupts. */
|
void ei_interrupt(int irq, void *dev_id, struct pt_regs * regs)
|
void ei_interrupt(int irq, void *dev_id, struct pt_regs * regs)
|
{
|
{
|
struct device *dev;
|
struct device *dev;
|
int e8390_base;
|
int e8390_base;
|
int interrupts, nr_serviced = 0;
|
int interrupts, nr_serviced = 0;
|
struct ei_device *ei_local;
|
struct ei_device *ei_local;
|
|
|
#ifdef CONFIG_COLDFIRE
|
#ifdef CONFIG_COLDFIRE
|
dev = (struct device *)(irq2dev_map[NE2000_ISA_IRQ]);
|
dev = (struct device *)(irq2dev_map[NE2000_ISA_IRQ]);
|
#ifdef NETtel_LEDETH
|
#ifdef NETtel_LEDETH
|
setled(NETtel_LEDETH);
|
setled(NETtel_LEDETH);
|
ethernet_tick = 4;
|
ethernet_tick = 4;
|
#endif
|
#endif
|
#else
|
#else
|
dev = (struct device *)(irq2dev_map[irq]);
|
dev = (struct device *)(irq2dev_map[irq]);
|
#endif
|
#endif
|
|
|
if (dev == NULL) {
|
if (dev == NULL) {
|
printk ("net_interrupt(): irq %d for unknown device.\n", irq);
|
printk ("net_interrupt(): irq %d for unknown device.\n", irq);
|
return;
|
return;
|
}
|
}
|
e8390_base = dev->base_addr;
|
e8390_base = dev->base_addr;
|
ei_local = (struct ei_device *) dev->priv;
|
ei_local = (struct ei_device *) dev->priv;
|
if (dev->interrupt || ei_local->irqlock) {
|
if (dev->interrupt || ei_local->irqlock) {
|
/* The "irqlock" check is only for testing. */
|
/* The "irqlock" check is only for testing. */
|
printk(ei_local->irqlock
|
printk(ei_local->irqlock
|
? "%s: Interrupted while interrupts are masked! isr=%#2x imr=%#2x.\n"
|
? "%s: Interrupted while interrupts are masked! isr=%#2x imr=%#2x.\n"
|
: "%s: Reentering the interrupt handler! isr=%#2x imr=%#2x.\n",
|
: "%s: Reentering the interrupt handler! isr=%#2x imr=%#2x.\n",
|
dev->name, inb_p(e8390_base + EN0_ISR),
|
dev->name, inb_p(e8390_base + EN0_ISR),
|
inb_p(e8390_base + EN0_IMR));
|
inb_p(e8390_base + EN0_IMR));
|
return;
|
return;
|
}
|
}
|
|
|
dev->interrupt = 1;
|
dev->interrupt = 1;
|
|
|
/* Change to page 0 and read the intr status reg. */
|
/* Change to page 0 and read the intr status reg. */
|
outb_p(E8390_NODMA+E8390_PAGE0, e8390_base + E8390_CMD);
|
outb_p(E8390_NODMA+E8390_PAGE0, e8390_base + E8390_CMD);
|
if (ei_debug > 3)
|
if (ei_debug > 3)
|
printk("%s: interrupt(isr=%#2.2x).\n", dev->name,
|
printk("%s: interrupt(isr=%#2.2x).\n", dev->name,
|
inb_p(e8390_base + EN0_ISR));
|
inb_p(e8390_base + EN0_ISR));
|
|
|
/* !!Assumption!! -- we stay in page 0. Don't break this. */
|
/* !!Assumption!! -- we stay in page 0. Don't break this. */
|
while ((interrupts = inb_p(e8390_base + EN0_ISR)) != 0
|
while ((interrupts = inb_p(e8390_base + EN0_ISR)) != 0
|
&& ++nr_serviced < MAX_SERVICE) {
|
&& ++nr_serviced < MAX_SERVICE) {
|
if (dev->start == 0) {
|
if (dev->start == 0) {
|
printk("%s: interrupt from stopped card\n", dev->name);
|
printk("%s: interrupt from stopped card\n", dev->name);
|
interrupts = 0;
|
interrupts = 0;
|
break;
|
break;
|
}
|
}
|
if (interrupts & ENISR_OVER) {
|
if (interrupts & ENISR_OVER) {
|
ei_rx_overrun(dev);
|
ei_rx_overrun(dev);
|
} else if (interrupts & (ENISR_RX+ENISR_RX_ERR)) {
|
} else if (interrupts & (ENISR_RX+ENISR_RX_ERR)) {
|
/* Got a good (?) packet. */
|
/* Got a good (?) packet. */
|
ei_receive(dev);
|
ei_receive(dev);
|
}
|
}
|
/* Push the next to-transmit packet through. */
|
/* Push the next to-transmit packet through. */
|
if (interrupts & ENISR_TX) {
|
if (interrupts & ENISR_TX) {
|
ei_tx_intr(dev);
|
ei_tx_intr(dev);
|
} else if (interrupts & ENISR_TX_ERR) {
|
} else if (interrupts & ENISR_TX_ERR) {
|
ei_tx_err(dev);
|
ei_tx_err(dev);
|
}
|
}
|
|
|
if (interrupts & ENISR_COUNTERS) {
|
if (interrupts & ENISR_COUNTERS) {
|
ei_local->stat.rx_frame_errors += inb_p(e8390_base + EN0_COUNTER0);
|
ei_local->stat.rx_frame_errors += inb_p(e8390_base + EN0_COUNTER0);
|
ei_local->stat.rx_crc_errors += inb_p(e8390_base + EN0_COUNTER1);
|
ei_local->stat.rx_crc_errors += inb_p(e8390_base + EN0_COUNTER1);
|
ei_local->stat.rx_missed_errors+= inb_p(e8390_base + EN0_COUNTER2);
|
ei_local->stat.rx_missed_errors+= inb_p(e8390_base + EN0_COUNTER2);
|
outb_p(ENISR_COUNTERS, e8390_base + EN0_ISR); /* Ack intr. */
|
outb_p(ENISR_COUNTERS, e8390_base + EN0_ISR); /* Ack intr. */
|
}
|
}
|
|
|
/* Ignore any RDC interrupts that make it back to here. */
|
/* Ignore any RDC interrupts that make it back to here. */
|
if (interrupts & ENISR_RDC) {
|
if (interrupts & ENISR_RDC) {
|
outb_p(ENISR_RDC, e8390_base + EN0_ISR);
|
outb_p(ENISR_RDC, e8390_base + EN0_ISR);
|
}
|
}
|
|
|
outb_p(E8390_NODMA+E8390_PAGE0+E8390_START, e8390_base + E8390_CMD);
|
outb_p(E8390_NODMA+E8390_PAGE0+E8390_START, e8390_base + E8390_CMD);
|
}
|
}
|
|
|
if (interrupts && ei_debug) {
|
if (interrupts && ei_debug) {
|
outb_p(E8390_NODMA+E8390_PAGE0+E8390_START, e8390_base + E8390_CMD);
|
outb_p(E8390_NODMA+E8390_PAGE0+E8390_START, e8390_base + E8390_CMD);
|
if (nr_serviced >= MAX_SERVICE) {
|
if (nr_serviced >= MAX_SERVICE) {
|
printk("%s: Too much work at interrupt, status %#2.2x\n",
|
printk("%s: Too much work at interrupt, status %#2.2x\n",
|
dev->name, interrupts);
|
dev->name, interrupts);
|
outb_p(ENISR_ALL, e8390_base + EN0_ISR); /* Ack. most intrs. */
|
outb_p(ENISR_ALL, e8390_base + EN0_ISR); /* Ack. most intrs. */
|
} else {
|
} else {
|
printk("%s: unknown interrupt %#2x\n", dev->name, interrupts);
|
printk("%s: unknown interrupt %#2x\n", dev->name, interrupts);
|
outb_p(0xff, e8390_base + EN0_ISR); /* Ack. all intrs. */
|
outb_p(0xff, e8390_base + EN0_ISR); /* Ack. all intrs. */
|
}
|
}
|
}
|
}
|
dev->interrupt = 0;
|
dev->interrupt = 0;
|
return;
|
return;
|
}
|
}
|
|
|
/*
|
/*
|
* A transmitter error has happened. Most likely excess collisions (which
|
* A transmitter error has happened. Most likely excess collisions (which
|
* is a fairly normal condition). If the error is one where the Tx will
|
* is a fairly normal condition). If the error is one where the Tx will
|
* have been aborted, we try and send another one right away, instead of
|
* have been aborted, we try and send another one right away, instead of
|
* letting the failed packet sit and collect dust in the Tx buffer. This
|
* letting the failed packet sit and collect dust in the Tx buffer. This
|
* is a much better solution as it avoids kernel based Tx timeouts, and
|
* is a much better solution as it avoids kernel based Tx timeouts, and
|
* an unnecessary card reset.
|
* an unnecessary card reset.
|
*/
|
*/
|
|
|
static void ei_tx_err(struct device *dev)
|
static void ei_tx_err(struct device *dev)
|
{
|
{
|
int e8390_base = dev->base_addr;
|
int e8390_base = dev->base_addr;
|
unsigned char txsr = inb_p(e8390_base+EN0_TSR);
|
unsigned char txsr = inb_p(e8390_base+EN0_TSR);
|
unsigned char tx_was_aborted = txsr & (ENTSR_ABT+ENTSR_FU);
|
unsigned char tx_was_aborted = txsr & (ENTSR_ABT+ENTSR_FU);
|
struct ei_device *ei_local = (struct ei_device *) dev->priv;
|
struct ei_device *ei_local = (struct ei_device *) dev->priv;
|
|
|
#ifdef VERBOSE_ERROR_DUMP
|
#ifdef VERBOSE_ERROR_DUMP
|
printk(KERN_DEBUG "%s: transmitter error (%#2x): ", dev->name, txsr);
|
printk(KERN_DEBUG "%s: transmitter error (%#2x): ", dev->name, txsr);
|
if (txsr & ENTSR_ABT)
|
if (txsr & ENTSR_ABT)
|
printk("excess-collisions ");
|
printk("excess-collisions ");
|
if (txsr & ENTSR_ND)
|
if (txsr & ENTSR_ND)
|
printk("non-deferral ");
|
printk("non-deferral ");
|
if (txsr & ENTSR_CRS)
|
if (txsr & ENTSR_CRS)
|
printk("lost-carrier ");
|
printk("lost-carrier ");
|
if (txsr & ENTSR_FU)
|
if (txsr & ENTSR_FU)
|
printk("FIFO-underrun ");
|
printk("FIFO-underrun ");
|
if (txsr & ENTSR_CDH)
|
if (txsr & ENTSR_CDH)
|
printk("lost-heartbeat ");
|
printk("lost-heartbeat ");
|
printk("\n");
|
printk("\n");
|
#endif
|
#endif
|
|
|
outb_p(ENISR_TX_ERR, e8390_base + EN0_ISR); /* Ack intr. */
|
outb_p(ENISR_TX_ERR, e8390_base + EN0_ISR); /* Ack intr. */
|
|
|
if (tx_was_aborted)
|
if (tx_was_aborted)
|
ei_tx_intr(dev);
|
ei_tx_intr(dev);
|
|
|
/*
|
/*
|
* Note: NCR reads zero on 16 collisions so we add them
|
* Note: NCR reads zero on 16 collisions so we add them
|
* in by hand. Somebody might care...
|
* in by hand. Somebody might care...
|
*/
|
*/
|
if (txsr & ENTSR_ABT)
|
if (txsr & ENTSR_ABT)
|
ei_local->stat.collisions += 16;
|
ei_local->stat.collisions += 16;
|
|
|
}
|
}
|
|
|
/* We have finished a transmit: check for errors and then trigger the next
|
/* We have finished a transmit: check for errors and then trigger the next
|
packet to be sent. */
|
packet to be sent. */
|
static void ei_tx_intr(struct device *dev)
|
static void ei_tx_intr(struct device *dev)
|
{
|
{
|
int e8390_base = dev->base_addr;
|
int e8390_base = dev->base_addr;
|
int status = inb(e8390_base + EN0_TSR);
|
int status = inb(e8390_base + EN0_TSR);
|
struct ei_device *ei_local = (struct ei_device *) dev->priv;
|
struct ei_device *ei_local = (struct ei_device *) dev->priv;
|
|
|
outb_p(ENISR_TX, e8390_base + EN0_ISR); /* Ack intr. */
|
outb_p(ENISR_TX, e8390_base + EN0_ISR); /* Ack intr. */
|
|
|
#ifdef EI_PINGPONG
|
#ifdef EI_PINGPONG
|
|
|
/*
|
/*
|
* There are two Tx buffers, see which one finished, and trigger
|
* There are two Tx buffers, see which one finished, and trigger
|
* the send of another one if it exists.
|
* the send of another one if it exists.
|
*/
|
*/
|
ei_local->txqueue--;
|
ei_local->txqueue--;
|
if (ei_local->tx1 < 0) {
|
if (ei_local->tx1 < 0) {
|
if (ei_local->lasttx != 1 && ei_local->lasttx != -1)
|
if (ei_local->lasttx != 1 && ei_local->lasttx != -1)
|
printk("%s: bogus last_tx_buffer %d, tx1=%d.\n",
|
printk("%s: bogus last_tx_buffer %d, tx1=%d.\n",
|
ei_local->name, ei_local->lasttx, ei_local->tx1);
|
ei_local->name, ei_local->lasttx, ei_local->tx1);
|
ei_local->tx1 = 0;
|
ei_local->tx1 = 0;
|
dev->tbusy = 0;
|
dev->tbusy = 0;
|
if (ei_local->tx2 > 0) {
|
if (ei_local->tx2 > 0) {
|
ei_local->txing = 1;
|
ei_local->txing = 1;
|
NS8390_trigger_send(dev, ei_local->tx2, ei_local->tx_start_page + 6);
|
NS8390_trigger_send(dev, ei_local->tx2, ei_local->tx_start_page + 6);
|
dev->trans_start = jiffies;
|
dev->trans_start = jiffies;
|
ei_local->tx2 = -1,
|
ei_local->tx2 = -1,
|
ei_local->lasttx = 2;
|
ei_local->lasttx = 2;
|
} else
|
} else
|
ei_local->lasttx = 20, ei_local->txing = 0;
|
ei_local->lasttx = 20, ei_local->txing = 0;
|
} else if (ei_local->tx2 < 0) {
|
} else if (ei_local->tx2 < 0) {
|
if (ei_local->lasttx != 2 && ei_local->lasttx != -2)
|
if (ei_local->lasttx != 2 && ei_local->lasttx != -2)
|
printk("%s: bogus last_tx_buffer %d, tx2=%d.\n",
|
printk("%s: bogus last_tx_buffer %d, tx2=%d.\n",
|
ei_local->name, ei_local->lasttx, ei_local->tx2);
|
ei_local->name, ei_local->lasttx, ei_local->tx2);
|
ei_local->tx2 = 0;
|
ei_local->tx2 = 0;
|
dev->tbusy = 0;
|
dev->tbusy = 0;
|
if (ei_local->tx1 > 0) {
|
if (ei_local->tx1 > 0) {
|
ei_local->txing = 1;
|
ei_local->txing = 1;
|
NS8390_trigger_send(dev, ei_local->tx1, ei_local->tx_start_page);
|
NS8390_trigger_send(dev, ei_local->tx1, ei_local->tx_start_page);
|
dev->trans_start = jiffies;
|
dev->trans_start = jiffies;
|
ei_local->tx1 = -1;
|
ei_local->tx1 = -1;
|
ei_local->lasttx = 1;
|
ei_local->lasttx = 1;
|
} else
|
} else
|
ei_local->lasttx = 10, ei_local->txing = 0;
|
ei_local->lasttx = 10, ei_local->txing = 0;
|
} else
|
} else
|
printk("%s: unexpected TX-done interrupt, lasttx=%d.\n",
|
printk("%s: unexpected TX-done interrupt, lasttx=%d.\n",
|
dev->name, ei_local->lasttx);
|
dev->name, ei_local->lasttx);
|
|
|
#else /* EI_PINGPONG */
|
#else /* EI_PINGPONG */
|
/*
|
/*
|
* Single Tx buffer: mark it free so another packet can be loaded.
|
* Single Tx buffer: mark it free so another packet can be loaded.
|
*/
|
*/
|
ei_local->txing = 0;
|
ei_local->txing = 0;
|
dev->tbusy = 0;
|
dev->tbusy = 0;
|
#endif
|
#endif
|
|
|
/* Minimize Tx latency: update the statistics after we restart TXing. */
|
/* Minimize Tx latency: update the statistics after we restart TXing. */
|
if (status & ENTSR_COL)
|
if (status & ENTSR_COL)
|
ei_local->stat.collisions++;
|
ei_local->stat.collisions++;
|
if (status & ENTSR_PTX)
|
if (status & ENTSR_PTX)
|
ei_local->stat.tx_packets++;
|
ei_local->stat.tx_packets++;
|
else {
|
else {
|
ei_local->stat.tx_errors++;
|
ei_local->stat.tx_errors++;
|
if (status & ENTSR_ABT) ei_local->stat.tx_aborted_errors++;
|
if (status & ENTSR_ABT) ei_local->stat.tx_aborted_errors++;
|
if (status & ENTSR_CRS) ei_local->stat.tx_carrier_errors++;
|
if (status & ENTSR_CRS) ei_local->stat.tx_carrier_errors++;
|
if (status & ENTSR_FU) ei_local->stat.tx_fifo_errors++;
|
if (status & ENTSR_FU) ei_local->stat.tx_fifo_errors++;
|
if (status & ENTSR_CDH) ei_local->stat.tx_heartbeat_errors++;
|
if (status & ENTSR_CDH) ei_local->stat.tx_heartbeat_errors++;
|
if (status & ENTSR_OWC) ei_local->stat.tx_window_errors++;
|
if (status & ENTSR_OWC) ei_local->stat.tx_window_errors++;
|
}
|
}
|
|
|
mark_bh (NET_BH);
|
mark_bh (NET_BH);
|
}
|
}
|
|
|
/* We have a good packet(s), get it/them out of the buffers. */
|
/* We have a good packet(s), get it/them out of the buffers. */
|
|
|
static void ei_receive(struct device *dev)
|
static void ei_receive(struct device *dev)
|
{
|
{
|
int e8390_base = dev->base_addr;
|
int e8390_base = dev->base_addr;
|
struct ei_device *ei_local = (struct ei_device *) dev->priv;
|
struct ei_device *ei_local = (struct ei_device *) dev->priv;
|
unsigned char rxing_page, this_frame, next_frame;
|
unsigned char rxing_page, this_frame, next_frame;
|
unsigned short current_offset;
|
unsigned short current_offset;
|
int rx_pkt_count = 0;
|
int rx_pkt_count = 0;
|
struct e8390_pkt_hdr rx_frame;
|
struct e8390_pkt_hdr rx_frame;
|
int num_rx_pages = ei_local->stop_page-ei_local->rx_start_page;
|
int num_rx_pages = ei_local->stop_page-ei_local->rx_start_page;
|
|
|
while (++rx_pkt_count < 10) {
|
while (++rx_pkt_count < 10) {
|
int pkt_len;
|
int pkt_len;
|
|
|
/* Get the rx page (incoming packet pointer). */
|
/* Get the rx page (incoming packet pointer). */
|
outb_p(E8390_NODMA+E8390_PAGE1, e8390_base + E8390_CMD);
|
outb_p(E8390_NODMA+E8390_PAGE1, e8390_base + E8390_CMD);
|
rxing_page = inb_p(e8390_base + EN1_CURPAG);
|
rxing_page = inb_p(e8390_base + EN1_CURPAG);
|
outb_p(E8390_NODMA+E8390_PAGE0, e8390_base + E8390_CMD);
|
outb_p(E8390_NODMA+E8390_PAGE0, e8390_base + E8390_CMD);
|
|
|
/* Remove one frame from the ring. Boundary is always a page behind. */
|
/* Remove one frame from the ring. Boundary is always a page behind. */
|
this_frame = inb_p(e8390_base + EN0_BOUNDARY) + 1;
|
this_frame = inb_p(e8390_base + EN0_BOUNDARY) + 1;
|
if (this_frame >= ei_local->stop_page)
|
if (this_frame >= ei_local->stop_page)
|
this_frame = ei_local->rx_start_page;
|
this_frame = ei_local->rx_start_page;
|
|
|
/* Someday we'll omit the previous, iff we never get this message.
|
/* Someday we'll omit the previous, iff we never get this message.
|
(There is at least one clone claimed to have a problem.) */
|
(There is at least one clone claimed to have a problem.) */
|
if (ei_debug > 0 && this_frame != ei_local->current_page)
|
if (ei_debug > 0 && this_frame != ei_local->current_page)
|
printk("%s: mismatched read page pointers %2x vs %2x.\n",
|
printk("%s: mismatched read page pointers %2x vs %2x.\n",
|
dev->name, this_frame, ei_local->current_page);
|
dev->name, this_frame, ei_local->current_page);
|
|
|
if (this_frame == rxing_page) /* Read all the frames? */
|
if (this_frame == rxing_page) /* Read all the frames? */
|
break; /* Done for now */
|
break; /* Done for now */
|
|
|
current_offset = this_frame << 8;
|
current_offset = this_frame << 8;
|
ei_get_8390_hdr(dev, &rx_frame, this_frame);
|
ei_get_8390_hdr(dev, &rx_frame, this_frame);
|
|
|
pkt_len = rx_frame.count - sizeof(struct e8390_pkt_hdr);
|
pkt_len = rx_frame.count - sizeof(struct e8390_pkt_hdr);
|
|
|
next_frame = this_frame + 1 + ((pkt_len+4)>>8);
|
next_frame = this_frame + 1 + ((pkt_len+4)>>8);
|
|
|
/* Check for bogosity warned by 3c503 book: the status byte is never
|
/* Check for bogosity warned by 3c503 book: the status byte is never
|
written. This happened a lot during testing! This code should be
|
written. This happened a lot during testing! This code should be
|
cleaned up someday. */
|
cleaned up someday. */
|
if (rx_frame.next != next_frame
|
if (rx_frame.next != next_frame
|
&& rx_frame.next != next_frame + 1
|
&& rx_frame.next != next_frame + 1
|
&& rx_frame.next != next_frame - num_rx_pages
|
&& rx_frame.next != next_frame - num_rx_pages
|
&& rx_frame.next != next_frame + 1 - num_rx_pages) {
|
&& rx_frame.next != next_frame + 1 - num_rx_pages) {
|
ei_local->current_page = rxing_page;
|
ei_local->current_page = rxing_page;
|
outb(ei_local->current_page-1, e8390_base+EN0_BOUNDARY);
|
outb(ei_local->current_page-1, e8390_base+EN0_BOUNDARY);
|
#if 1
|
#if 1
|
printk("%s(%d): ERROR -> rx_frame.next=%x "
|
printk("%s(%d): ERROR -> rx_frame.next=%x "
|
"next_frame=%x num_rx_pages=%x\n",
|
"next_frame=%x num_rx_pages=%x\n",
|
__FILE__, __LINE__, rx_frame.next,
|
__FILE__, __LINE__, rx_frame.next,
|
next_frame, num_rx_pages);
|
next_frame, num_rx_pages);
|
#endif
|
#endif
|
ei_local->stat.rx_errors++;
|
ei_local->stat.rx_errors++;
|
continue;
|
continue;
|
}
|
}
|
|
|
if (pkt_len < 60 || pkt_len > 1518) {
|
if (pkt_len < 60 || pkt_len > 1518) {
|
if (ei_debug)
|
if (ei_debug)
|
printk("%s: bogus packet size: %d, status=%#2x nxpg=%#2x.\n",
|
printk("%s: bogus packet size: %d, status=%#2x nxpg=%#2x.\n",
|
dev->name, rx_frame.count, rx_frame.status,
|
dev->name, rx_frame.count, rx_frame.status,
|
rx_frame.next);
|
rx_frame.next);
|
ei_local->stat.rx_errors++;
|
ei_local->stat.rx_errors++;
|
} else if ((rx_frame.status & 0x0F) == ENRSR_RXOK) {
|
} else if ((rx_frame.status & 0x0F) == ENRSR_RXOK) {
|
struct sk_buff *skb;
|
struct sk_buff *skb;
|
|
|
skb = dev_alloc_skb(pkt_len+2);
|
skb = dev_alloc_skb(pkt_len+2);
|
if (skb == NULL) {
|
if (skb == NULL) {
|
if (ei_debug > 1)
|
if (ei_debug > 1)
|
printk("%s: Couldn't allocate a sk_buff of size %d.\n",
|
printk("%s: Couldn't allocate a sk_buff of size %d.\n",
|
dev->name, pkt_len);
|
dev->name, pkt_len);
|
ei_local->stat.rx_dropped++;
|
ei_local->stat.rx_dropped++;
|
break;
|
break;
|
} else {
|
} else {
|
skb_reserve(skb,2); /* IP headers on 16 byte boundaries */
|
skb_reserve(skb,2); /* IP headers on 16 byte boundaries */
|
skb->dev = dev;
|
skb->dev = dev;
|
skb_put(skb, pkt_len); /* Make room */
|
skb_put(skb, pkt_len); /* Make room */
|
ei_block_input(dev, pkt_len, skb, current_offset + sizeof(rx_frame));
|
ei_block_input(dev, pkt_len, skb, current_offset + sizeof(rx_frame));
|
skb->protocol=eth_type_trans(skb,dev);
|
skb->protocol=eth_type_trans(skb,dev);
|
netif_rx(skb);
|
netif_rx(skb);
|
ei_local->stat.rx_packets++;
|
ei_local->stat.rx_packets++;
|
}
|
}
|
} else {
|
} else {
|
int errs = rx_frame.status;
|
int errs = rx_frame.status;
|
if (ei_debug)
|
if (ei_debug)
|
printk("%s: bogus packet: status=%#2x nxpg=%#2x size=%d\n",
|
printk("%s: bogus packet: status=%#2x nxpg=%#2x size=%d\n",
|
dev->name, rx_frame.status, rx_frame.next,
|
dev->name, rx_frame.status, rx_frame.next,
|
rx_frame.count);
|
rx_frame.count);
|
if (errs & ENRSR_FO)
|
if (errs & ENRSR_FO)
|
ei_local->stat.rx_fifo_errors++;
|
ei_local->stat.rx_fifo_errors++;
|
}
|
}
|
next_frame = rx_frame.next;
|
next_frame = rx_frame.next;
|
|
|
/* This _should_ never happen: it's here for avoiding bad clones. */
|
/* This _should_ never happen: it's here for avoiding bad clones. */
|
if (next_frame >= ei_local->stop_page) {
|
if (next_frame >= ei_local->stop_page) {
|
printk("%s: next frame inconsistency, %#2x\n", dev->name,
|
printk("%s: next frame inconsistency, %#2x\n", dev->name,
|
next_frame);
|
next_frame);
|
next_frame = ei_local->rx_start_page;
|
next_frame = ei_local->rx_start_page;
|
}
|
}
|
ei_local->current_page = next_frame;
|
ei_local->current_page = next_frame;
|
outb_p(next_frame-1, e8390_base+EN0_BOUNDARY);
|
outb_p(next_frame-1, e8390_base+EN0_BOUNDARY);
|
}
|
}
|
|
|
/* We used to also ack ENISR_OVER here, but that would sometimes mask
|
/* We used to also ack ENISR_OVER here, but that would sometimes mask
|
a real overrun, leaving the 8390 in a stopped state with rec'vr off. */
|
a real overrun, leaving the 8390 in a stopped state with rec'vr off. */
|
outb_p(ENISR_RX+ENISR_RX_ERR, e8390_base+EN0_ISR);
|
outb_p(ENISR_RX+ENISR_RX_ERR, e8390_base+EN0_ISR);
|
return;
|
return;
|
}
|
}
|
|
|
/*
|
/*
|
* We have a receiver overrun: we have to kick the 8390 to get it started
|
* We have a receiver overrun: we have to kick the 8390 to get it started
|
* again. Problem is that you have to kick it exactly as NS prescribes in
|
* again. Problem is that you have to kick it exactly as NS prescribes in
|
* the updated datasheets, or "the NIC may act in an unpredictable manner."
|
* the updated datasheets, or "the NIC may act in an unpredictable manner."
|
* This includes causing "the NIC to defer indefinitely when it is stopped
|
* This includes causing "the NIC to defer indefinitely when it is stopped
|
* on a busy network." Ugh.
|
* on a busy network." Ugh.
|
*/
|
*/
|
static void ei_rx_overrun(struct device *dev)
|
static void ei_rx_overrun(struct device *dev)
|
{
|
{
|
int e8390_base = dev->base_addr;
|
int e8390_base = dev->base_addr;
|
unsigned long wait_start_time;
|
unsigned long wait_start_time;
|
unsigned char was_txing, must_resend = 0;
|
unsigned char was_txing, must_resend = 0;
|
struct ei_device *ei_local = (struct ei_device *) dev->priv;
|
struct ei_device *ei_local = (struct ei_device *) dev->priv;
|
|
|
/*
|
/*
|
* Record whether a Tx was in progress and then issue the
|
* Record whether a Tx was in progress and then issue the
|
* stop command.
|
* stop command.
|
*/
|
*/
|
was_txing = inb_p(e8390_base+E8390_CMD) & E8390_TRANS;
|
was_txing = inb_p(e8390_base+E8390_CMD) & E8390_TRANS;
|
outb_p(E8390_NODMA+E8390_PAGE0+E8390_STOP, e8390_base+E8390_CMD);
|
outb_p(E8390_NODMA+E8390_PAGE0+E8390_STOP, e8390_base+E8390_CMD);
|
|
|
if (ei_debug > 1)
|
if (ei_debug > 1)
|
printk("%s: Receiver overrun.\n", dev->name);
|
printk("%s: Receiver overrun.\n", dev->name);
|
ei_local->stat.rx_over_errors++;
|
ei_local->stat.rx_over_errors++;
|
|
|
/*
|
/*
|
* Wait a full Tx time (1.2ms) + some guard time, NS says 1.6ms total.
|
* Wait a full Tx time (1.2ms) + some guard time, NS says 1.6ms total.
|
* Early datasheets said to poll the reset bit, but now they say that
|
* Early datasheets said to poll the reset bit, but now they say that
|
* it "is not a reliable indicator and subsequently should be ignored."
|
* it "is not a reliable indicator and subsequently should be ignored."
|
* We wait at least 10ms.
|
* We wait at least 10ms.
|
*/
|
*/
|
wait_start_time = jiffies;
|
wait_start_time = jiffies;
|
#ifdef CONFIG_COLDFIRE
|
#ifdef CONFIG_COLDFIRE
|
/*
|
/*
|
* I don't see how the following can work eithout enabling
|
* I don't see how the following can work eithout enabling
|
* interrupts again?
|
* interrupts again?
|
*/
|
*/
|
sti();
|
sti();
|
#endif
|
#endif
|
while (jiffies - wait_start_time <= 1*HZ/100)
|
while (jiffies - wait_start_time <= 1*HZ/100)
|
barrier();
|
barrier();
|
#ifdef CONFIG_COLDFIRE
|
#ifdef CONFIG_COLDFIRE
|
cli();
|
cli();
|
#endif
|
#endif
|
|
|
/*
|
/*
|
* Reset RBCR[01] back to zero as per magic incantation.
|
* Reset RBCR[01] back to zero as per magic incantation.
|
*/
|
*/
|
outb_p(0x00, e8390_base+EN0_RCNTLO);
|
outb_p(0x00, e8390_base+EN0_RCNTLO);
|
outb_p(0x00, e8390_base+EN0_RCNTHI);
|
outb_p(0x00, e8390_base+EN0_RCNTHI);
|
|
|
/*
|
/*
|
* See if any Tx was interrupted or not. According to NS, this
|
* See if any Tx was interrupted or not. According to NS, this
|
* step is vital, and skipping it will cause no end of havoc.
|
* step is vital, and skipping it will cause no end of havoc.
|
*/
|
*/
|
if (was_txing) {
|
if (was_txing) {
|
unsigned char tx_completed = inb_p(e8390_base+EN0_ISR) & (ENISR_TX+ENISR_TX_ERR);
|
unsigned char tx_completed = inb_p(e8390_base+EN0_ISR) & (ENISR_TX+ENISR_TX_ERR);
|
if (!tx_completed) must_resend = 1;
|
if (!tx_completed) must_resend = 1;
|
}
|
}
|
|
|
/*
|
/*
|
* Have to enter loopback mode and then restart the NIC before
|
* Have to enter loopback mode and then restart the NIC before
|
* you are allowed to slurp packets up off the ring.
|
* you are allowed to slurp packets up off the ring.
|
*/
|
*/
|
outb_p(E8390_TXOFF, e8390_base + EN0_TXCR);
|
outb_p(E8390_TXOFF, e8390_base + EN0_TXCR);
|
outb_p(E8390_NODMA + E8390_PAGE0 + E8390_START, e8390_base + E8390_CMD);
|
outb_p(E8390_NODMA + E8390_PAGE0 + E8390_START, e8390_base + E8390_CMD);
|
|
|
/*
|
/*
|
* Clear the Rx ring of all the debris, and ack the interrupt.
|
* Clear the Rx ring of all the debris, and ack the interrupt.
|
*/
|
*/
|
ei_receive(dev);
|
ei_receive(dev);
|
outb_p(ENISR_OVER, e8390_base+EN0_ISR);
|
outb_p(ENISR_OVER, e8390_base+EN0_ISR);
|
|
|
/*
|
/*
|
* Leave loopback mode, and resend any packet that got stopped.
|
* Leave loopback mode, and resend any packet that got stopped.
|
*/
|
*/
|
outb_p(E8390_TXCONFIG, e8390_base + EN0_TXCR);
|
outb_p(E8390_TXCONFIG, e8390_base + EN0_TXCR);
|
if (must_resend)
|
if (must_resend)
|
outb_p(E8390_NODMA + E8390_PAGE0 + E8390_START + E8390_TRANS, e8390_base + E8390_CMD);
|
outb_p(E8390_NODMA + E8390_PAGE0 + E8390_START + E8390_TRANS, e8390_base + E8390_CMD);
|
|
|
}
|
}
|
|
|
static struct enet_statistics *get_stats(struct device *dev)
|
static struct enet_statistics *get_stats(struct device *dev)
|
{
|
{
|
short ioaddr = dev->base_addr;
|
short ioaddr = dev->base_addr;
|
struct ei_device *ei_local = (struct ei_device *) dev->priv;
|
struct ei_device *ei_local = (struct ei_device *) dev->priv;
|
|
|
/* If the card is stopped, just return the present stats. */
|
/* If the card is stopped, just return the present stats. */
|
if (dev->start == 0) return &ei_local->stat;
|
if (dev->start == 0) return &ei_local->stat;
|
|
|
/* Read the counter registers, assuming we are in page 0. */
|
/* Read the counter registers, assuming we are in page 0. */
|
ei_local->stat.rx_frame_errors += inb_p(ioaddr + EN0_COUNTER0);
|
ei_local->stat.rx_frame_errors += inb_p(ioaddr + EN0_COUNTER0);
|
ei_local->stat.rx_crc_errors += inb_p(ioaddr + EN0_COUNTER1);
|
ei_local->stat.rx_crc_errors += inb_p(ioaddr + EN0_COUNTER1);
|
ei_local->stat.rx_missed_errors+= inb_p(ioaddr + EN0_COUNTER2);
|
ei_local->stat.rx_missed_errors+= inb_p(ioaddr + EN0_COUNTER2);
|
|
|
return &ei_local->stat;
|
return &ei_local->stat;
|
}
|
}
|
|
|
/*
|
/*
|
* Set or clear the multicast filter for this adaptor.
|
* Set or clear the multicast filter for this adaptor.
|
*/
|
*/
|
|
|
static void set_multicast_list(struct device *dev)
|
static void set_multicast_list(struct device *dev)
|
{
|
{
|
short ioaddr = dev->base_addr;
|
short ioaddr = dev->base_addr;
|
|
|
if(dev->flags&IFF_PROMISC)
|
if(dev->flags&IFF_PROMISC)
|
{
|
{
|
outb_p(E8390_RXCONFIG | 0x18, ioaddr + EN0_RXCR);
|
outb_p(E8390_RXCONFIG | 0x18, ioaddr + EN0_RXCR);
|
}
|
}
|
else if((dev->flags&IFF_ALLMULTI)||dev->mc_list)
|
else if((dev->flags&IFF_ALLMULTI)||dev->mc_list)
|
{
|
{
|
/* The multicast-accept list is initialized to accept-all, and we
|
/* The multicast-accept list is initialized to accept-all, and we
|
rely on higher-level filtering for now. */
|
rely on higher-level filtering for now. */
|
outb_p(E8390_RXCONFIG | 0x08, ioaddr + EN0_RXCR);
|
outb_p(E8390_RXCONFIG | 0x08, ioaddr + EN0_RXCR);
|
}
|
}
|
else
|
else
|
outb_p(E8390_RXCONFIG, ioaddr + EN0_RXCR);
|
outb_p(E8390_RXCONFIG, ioaddr + EN0_RXCR);
|
}
|
}
|
|
|
/* Initialize the rest of the 8390 device structure. */
|
/* Initialize the rest of the 8390 device structure. */
|
int ethdev_init(struct device *dev)
|
int ethdev_init(struct device *dev)
|
{
|
{
|
if (ei_debug > 1)
|
if (ei_debug > 1)
|
printk(version);
|
printk(version);
|
|
|
if (dev->priv == NULL) {
|
if (dev->priv == NULL) {
|
struct ei_device *ei_local;
|
struct ei_device *ei_local;
|
|
|
dev->priv = kmalloc(sizeof(struct ei_device), GFP_KERNEL);
|
dev->priv = kmalloc(sizeof(struct ei_device), GFP_KERNEL);
|
if (dev->priv == NULL)
|
if (dev->priv == NULL)
|
return -ENOMEM;
|
return -ENOMEM;
|
memset(dev->priv, 0, sizeof(struct ei_device));
|
memset(dev->priv, 0, sizeof(struct ei_device));
|
ei_local = (struct ei_device *)dev->priv;
|
ei_local = (struct ei_device *)dev->priv;
|
}
|
}
|
|
|
dev->hard_start_xmit = &ei_start_xmit;
|
dev->hard_start_xmit = &ei_start_xmit;
|
dev->get_stats = get_stats;
|
dev->get_stats = get_stats;
|
dev->set_multicast_list = &set_multicast_list;
|
dev->set_multicast_list = &set_multicast_list;
|
|
|
ether_setup(dev);
|
ether_setup(dev);
|
|
|
return 0;
|
return 0;
|
}
|
}
|
|
|
|
|
/* This page of functions should be 8390 generic */
|
/* This page of functions should be 8390 generic */
|
/* Follow National Semi's recommendations for initializing the "NIC". */
|
/* Follow National Semi's recommendations for initializing the "NIC". */
|
void NS8390_init(struct device *dev, int startp)
|
void NS8390_init(struct device *dev, int startp)
|
{
|
{
|
int e8390_base = dev->base_addr;
|
int e8390_base = dev->base_addr;
|
struct ei_device *ei_local = (struct ei_device *) dev->priv;
|
struct ei_device *ei_local = (struct ei_device *) dev->priv;
|
int i;
|
int i;
|
int endcfg = ei_local->word16 ? (0x48 | ENDCFG_WTS) : 0x48;
|
int endcfg = ei_local->word16 ? (0x48 | ENDCFG_WTS) : 0x48;
|
unsigned long flags;
|
unsigned long flags;
|
|
|
/* Follow National Semi's recommendations for initing the DP83902. */
|
/* Follow National Semi's recommendations for initing the DP83902. */
|
outb_p(E8390_NODMA+E8390_PAGE0+E8390_STOP, e8390_base); /* 0x21 */
|
outb_p(E8390_NODMA+E8390_PAGE0+E8390_STOP, e8390_base); /* 0x21 */
|
outb_p(endcfg, e8390_base + EN0_DCFG); /* 0x48 or 0x49 */
|
outb_p(endcfg, e8390_base + EN0_DCFG); /* 0x48 or 0x49 */
|
/* Clear the remote byte count registers. */
|
/* Clear the remote byte count registers. */
|
outb_p(0x00, e8390_base + EN0_RCNTLO);
|
outb_p(0x00, e8390_base + EN0_RCNTLO);
|
outb_p(0x00, e8390_base + EN0_RCNTHI);
|
outb_p(0x00, e8390_base + EN0_RCNTHI);
|
/* Set to monitor and loopback mode -- this is vital!. */
|
/* Set to monitor and loopback mode -- this is vital!. */
|
outb_p(E8390_RXOFF, e8390_base + EN0_RXCR); /* 0x20 */
|
outb_p(E8390_RXOFF, e8390_base + EN0_RXCR); /* 0x20 */
|
outb_p(E8390_TXOFF, e8390_base + EN0_TXCR); /* 0x02 */
|
outb_p(E8390_TXOFF, e8390_base + EN0_TXCR); /* 0x02 */
|
/* Set the transmit page and receive ring. */
|
/* Set the transmit page and receive ring. */
|
outb_p(ei_local->tx_start_page, e8390_base + EN0_TPSR);
|
outb_p(ei_local->tx_start_page, e8390_base + EN0_TPSR);
|
ei_local->tx1 = ei_local->tx2 = 0;
|
ei_local->tx1 = ei_local->tx2 = 0;
|
outb_p(ei_local->rx_start_page, e8390_base + EN0_STARTPG);
|
outb_p(ei_local->rx_start_page, e8390_base + EN0_STARTPG);
|
outb_p(ei_local->stop_page-1, e8390_base + EN0_BOUNDARY); /* 3c503 says 0x3f,NS0x26*/
|
outb_p(ei_local->stop_page-1, e8390_base + EN0_BOUNDARY); /* 3c503 says 0x3f,NS0x26*/
|
ei_local->current_page = ei_local->rx_start_page; /* assert boundary+1 */
|
ei_local->current_page = ei_local->rx_start_page; /* assert boundary+1 */
|
outb_p(ei_local->stop_page, e8390_base + EN0_STOPPG);
|
outb_p(ei_local->stop_page, e8390_base + EN0_STOPPG);
|
/* Clear the pending interrupts and mask. */
|
/* Clear the pending interrupts and mask. */
|
outb_p(0xFF, e8390_base + EN0_ISR);
|
outb_p(0xFF, e8390_base + EN0_ISR);
|
outb_p(0x00, e8390_base + EN0_IMR);
|
outb_p(0x00, e8390_base + EN0_IMR);
|
|
|
/* Copy the station address into the DS8390 registers,
|
/* Copy the station address into the DS8390 registers,
|
and set the multicast hash bitmap to receive all multicasts. */
|
and set the multicast hash bitmap to receive all multicasts. */
|
save_flags(flags);
|
save_flags(flags);
|
cli();
|
cli();
|
outb_p(E8390_NODMA + E8390_PAGE1 + E8390_STOP, e8390_base); /* 0x61 */
|
outb_p(E8390_NODMA + E8390_PAGE1 + E8390_STOP, e8390_base); /* 0x61 */
|
for(i = 0; i < 6; i++) {
|
for(i = 0; i < 6; i++) {
|
outb_p(dev->dev_addr[i], e8390_base + EN1_PHYS + i);
|
outb_p(dev->dev_addr[i], e8390_base + EN1_PHYS + i);
|
}
|
}
|
/* Initialize the multicast list to accept-all. If we enable multicast
|
/* Initialize the multicast list to accept-all. If we enable multicast
|
the higher levels can do the filtering. */
|
the higher levels can do the filtering. */
|
for(i = 0; i < 8; i++)
|
for(i = 0; i < 8; i++)
|
outb_p(0xff, e8390_base + EN1_MULT + i);
|
outb_p(0xff, e8390_base + EN1_MULT + i);
|
|
|
outb_p(ei_local->rx_start_page, e8390_base + EN1_CURPAG);
|
outb_p(ei_local->rx_start_page, e8390_base + EN1_CURPAG);
|
outb_p(E8390_NODMA+E8390_PAGE0+E8390_STOP, e8390_base);
|
outb_p(E8390_NODMA+E8390_PAGE0+E8390_STOP, e8390_base);
|
restore_flags(flags);
|
restore_flags(flags);
|
dev->tbusy = 0;
|
dev->tbusy = 0;
|
dev->interrupt = 0;
|
dev->interrupt = 0;
|
ei_local->tx1 = ei_local->tx2 = 0;
|
ei_local->tx1 = ei_local->tx2 = 0;
|
ei_local->txing = 0;
|
ei_local->txing = 0;
|
if (startp) {
|
if (startp) {
|
outb_p(0xff, e8390_base + EN0_ISR);
|
outb_p(0xff, e8390_base + EN0_ISR);
|
outb_p(ENISR_ALL, e8390_base + EN0_IMR);
|
outb_p(ENISR_ALL, e8390_base + EN0_IMR);
|
outb_p(E8390_NODMA+E8390_PAGE0+E8390_START, e8390_base);
|
outb_p(E8390_NODMA+E8390_PAGE0+E8390_START, e8390_base);
|
outb_p(E8390_TXCONFIG, e8390_base + EN0_TXCR); /* xmit on. */
|
outb_p(E8390_TXCONFIG, e8390_base + EN0_TXCR); /* xmit on. */
|
/* 3c503 TechMan says rxconfig only after the NIC is started. */
|
/* 3c503 TechMan says rxconfig only after the NIC is started. */
|
outb_p(E8390_RXCONFIG, e8390_base + EN0_RXCR); /* rx on, */
|
outb_p(E8390_RXCONFIG, e8390_base + EN0_RXCR); /* rx on, */
|
dev->set_multicast_list(dev); /* Get the multicast status right if this
|
dev->set_multicast_list(dev); /* Get the multicast status right if this
|
was a reset. */
|
was a reset. */
|
}
|
}
|
return;
|
return;
|
}
|
}
|
|
|
/* Trigger a transmit start, assuming the length is valid. */
|
/* Trigger a transmit start, assuming the length is valid. */
|
static void NS8390_trigger_send(struct device *dev, unsigned int length,
|
static void NS8390_trigger_send(struct device *dev, unsigned int length,
|
int start_page)
|
int start_page)
|
{
|
{
|
int e8390_base = dev->base_addr;
|
int e8390_base = dev->base_addr;
|
|
|
outb_p(E8390_NODMA+E8390_PAGE0, e8390_base);
|
outb_p(E8390_NODMA+E8390_PAGE0, e8390_base);
|
|
|
if (inb_p(e8390_base) & E8390_TRANS) {
|
if (inb_p(e8390_base) & E8390_TRANS) {
|
printk("%s: trigger_send() called with the transmitter busy.\n",
|
printk("%s: trigger_send() called with the transmitter busy.\n",
|
dev->name);
|
dev->name);
|
return;
|
return;
|
}
|
}
|
outb_p(length & 0xff, e8390_base + EN0_TCNTLO);
|
outb_p(length & 0xff, e8390_base + EN0_TCNTLO);
|
outb_p(length >> 8, e8390_base + EN0_TCNTHI);
|
outb_p(length >> 8, e8390_base + EN0_TCNTHI);
|
outb_p(start_page, e8390_base + EN0_TPSR);
|
outb_p(start_page, e8390_base + EN0_TPSR);
|
outb_p(E8390_NODMA+E8390_TRANS+E8390_START, e8390_base);
|
outb_p(E8390_NODMA+E8390_TRANS+E8390_START, e8390_base);
|
return;
|
return;
|
}
|
}
|
|
|
#ifdef MODULE
|
#ifdef MODULE
|
|
|
int init_module(void)
|
int init_module(void)
|
{
|
{
|
return 0;
|
return 0;
|
}
|
}
|
|
|
void
|
void
|
cleanup_module(void)
|
cleanup_module(void)
|
{
|
{
|
}
|
}
|
#endif /* MODULE */
|
#endif /* MODULE */
|
|
|
/*
|
/*
|
* Local variables:
|
* Local variables:
|
* compile-command: "gcc -D__KERNEL__ -I/usr/src/linux/net/inet -Wall -Wstrict-prototypes -O6 -m486 -c 8390.c"
|
* compile-command: "gcc -D__KERNEL__ -I/usr/src/linux/net/inet -Wall -Wstrict-prototypes -O6 -m486 -c 8390.c"
|
* version-control: t
|
* version-control: t
|
* kept-new-versions: 5
|
* kept-new-versions: 5
|
* c-indent-level: 4
|
* c-indent-level: 4
|
* tab-width: 4
|
* tab-width: 4
|
* End:
|
* End:
|
*/
|
*/
|
|
|
