Commit aca25753 authored by Krzysztof Hałasa's avatar Krzysztof Hałasa
Browse files

WAN: Port COSA driver to generic HDLC.


Signed-off-by: default avatarKrzysztof Hałasa <khc@pm.waw.pl>
parent 0bee8db8
......@@ -37,7 +37,7 @@ config HOSTESS_SV11
# The COSA/SRP driver has not been tested as non-modular yet.
config COSA
tristate "COSA/SRP sync serial boards support"
depends on ISA && m && ISA_DMA_API
depends on ISA && m && ISA_DMA_API && HDLC
---help---
Driver for COSA and SRP synchronous serial boards.
......
......@@ -23,7 +23,7 @@ pc300-objs := $(pc300-y)
obj-$(CONFIG_HOSTESS_SV11) += z85230.o syncppp.o hostess_sv11.o
obj-$(CONFIG_SEALEVEL_4021) += z85230.o syncppp.o sealevel.o
obj-$(CONFIG_COSA) += syncppp.o cosa.o
obj-$(CONFIG_COSA) += cosa.o
obj-$(CONFIG_FARSYNC) += farsync.o
obj-$(CONFIG_DSCC4) += dscc4.o
obj-$(CONFIG_LANMEDIA) += syncppp.o
......
......@@ -2,6 +2,7 @@
/*
* Copyright (C) 1995-1997 Jan "Yenya" Kasprzak <kas@fi.muni.cz>
* Generic HDLC port Copyright (C) 2008 Krzysztof Halasa <khc@pm.waw.pl>
*
* This program is free software; you can redistribute it and/or modify
* it under the terms of the GNU General Public License as published by
......@@ -54,7 +55,7 @@
*
* The Linux driver (unlike the present *BSD drivers :-) can work even
* for the COSA and SRP in one computer and allows each channel to work
* in one of the three modes (character device, Cisco HDLC, Sync PPP).
* in one of the two modes (character or network device).
*
* AUTHOR
*
......@@ -72,12 +73,6 @@
* The Comtrol Hostess SV11 driver by Alan Cox
* The Sync PPP/Cisco HDLC layer (syncppp.c) ported to Linux by Alan Cox
*/
/*
* 5/25/1999 : Marcelo Tosatti <marcelo@conectiva.com.br>
* fixed a deadlock in cosa_sppp_open
*/
/* ---------- Headers, macros, data structures ---------- */
#include <linux/module.h>
#include <linux/kernel.h>
......@@ -86,6 +81,7 @@
#include <linux/fs.h>
#include <linux/interrupt.h>
#include <linux/delay.h>
#include <linux/hdlc.h>
#include <linux/errno.h>
#include <linux/ioport.h>
#include <linux/netdevice.h>
......@@ -93,14 +89,12 @@
#include <linux/mutex.h>
#include <linux/device.h>
#include <linux/smp_lock.h>
#undef COSA_SLOW_IO /* for testing purposes only */
#include <asm/io.h>
#include <asm/dma.h>
#include <asm/byteorder.h>
#include <net/syncppp.h>
#undef COSA_SLOW_IO /* for testing purposes only */
#include "cosa.h"
/* Maximum length of the identification string. */
......@@ -112,7 +106,6 @@
/* Per-channel data structure */
struct channel_data {
void *if_ptr; /* General purpose pointer (used by SPPP) */
int usage; /* Usage count; >0 for chrdev, -1 for netdev */
int num; /* Number of the channel */
struct cosa_data *cosa; /* Pointer to the per-card structure */
......@@ -136,10 +129,9 @@ struct channel_data {
wait_queue_head_t txwaitq, rxwaitq;
int tx_status, rx_status;
/* SPPP/HDLC device parts */
struct ppp_device pppdev;
/* generic HDLC device parts */
struct net_device *netdev;
struct sk_buff *rx_skb, *tx_skb;
struct net_device_stats stats;
};
/* cosa->firmware_status bits */
......@@ -281,21 +273,19 @@ static int cosa_start_tx(struct channel_data *channel, char *buf, int size);
static void cosa_kick(struct cosa_data *cosa);
static int cosa_dma_able(struct channel_data *chan, char *buf, int data);
/* SPPP/HDLC stuff */
static void sppp_channel_init(struct channel_data *chan);
static void sppp_channel_delete(struct channel_data *chan);
static int cosa_sppp_open(struct net_device *d);
static int cosa_sppp_close(struct net_device *d);
static void cosa_sppp_timeout(struct net_device *d);
static int cosa_sppp_tx(struct sk_buff *skb, struct net_device *d);
static char *sppp_setup_rx(struct channel_data *channel, int size);
static int sppp_rx_done(struct channel_data *channel);
static int sppp_tx_done(struct channel_data *channel, int size);
static int cosa_sppp_ioctl(struct net_device *dev, struct ifreq *ifr, int cmd);
static struct net_device_stats *cosa_net_stats(struct net_device *dev);
/* Network device stuff */
static int cosa_net_attach(struct net_device *dev, unsigned short encoding,
unsigned short parity);
static int cosa_net_open(struct net_device *d);
static int cosa_net_close(struct net_device *d);
static void cosa_net_timeout(struct net_device *d);
static int cosa_net_tx(struct sk_buff *skb, struct net_device *d);
static char *cosa_net_setup_rx(struct channel_data *channel, int size);
static int cosa_net_rx_done(struct channel_data *channel);
static int cosa_net_tx_done(struct channel_data *channel, int size);
static int cosa_net_ioctl(struct net_device *dev, struct ifreq *ifr, int cmd);
/* Character device */
static void chardev_channel_init(struct channel_data *chan);
static char *chrdev_setup_rx(struct channel_data *channel, int size);
static int chrdev_rx_done(struct channel_data *channel);
static int chrdev_tx_done(struct channel_data *channel, int size);
......@@ -357,17 +347,17 @@ static void debug_status_in(struct cosa_data *cosa, int status);
static void debug_status_out(struct cosa_data *cosa, int status);
#endif
static inline struct channel_data* dev_to_chan(struct net_device *dev)
{
return (struct channel_data *)dev_to_hdlc(dev)->priv;
}
/* ---------- Initialization stuff ---------- */
static int __init cosa_init(void)
{
int i, err = 0;
printk(KERN_INFO "cosa v1.08 (c) 1997-2000 Jan Kasprzak <kas@fi.muni.cz>\n");
#ifdef CONFIG_SMP
printk(KERN_INFO "cosa: SMP found. Please mail any success/failure reports to the author.\n");
#endif
if (cosa_major > 0) {
if (register_chrdev(cosa_major, "cosa", &cosa_fops)) {
printk(KERN_WARNING "cosa: unable to get major %d\n",
......@@ -402,7 +392,7 @@ static int __init cosa_init(void)
}
err = 0;
goto out;
out_chrdev:
unregister_chrdev(cosa_major, "cosa");
out:
......@@ -414,43 +404,29 @@ static void __exit cosa_exit(void)
{
struct cosa_data *cosa;
int i;
printk(KERN_INFO "Unloading the cosa module\n");
for (i=0; i<nr_cards; i++)
for (i = 0; i < nr_cards; i++)
device_destroy(cosa_class, MKDEV(cosa_major, i));
class_destroy(cosa_class);
for (cosa=cosa_cards; nr_cards--; cosa++) {
for (cosa = cosa_cards; nr_cards--; cosa++) {
/* Clean up the per-channel data */
for (i=0; i<cosa->nchannels; i++) {
for (i = 0; i < cosa->nchannels; i++) {
/* Chardev driver has no alloc'd per-channel data */
sppp_channel_delete(cosa->chan+i);
unregister_hdlc_device(cosa->chan[i].netdev);
free_netdev(cosa->chan[i].netdev);
}
/* Clean up the per-card data */
kfree(cosa->chan);
kfree(cosa->bouncebuf);
free_irq(cosa->irq, cosa);
free_dma(cosa->dma);
release_region(cosa->datareg,is_8bit(cosa)?2:4);
release_region(cosa->datareg, is_8bit(cosa) ? 2 : 4);
}
unregister_chrdev(cosa_major, "cosa");
}
module_exit(cosa_exit);
/*
* This function should register all the net devices needed for the
* single channel.
*/
static __inline__ void channel_init(struct channel_data *chan)
{
sprintf(chan->name, "cosa%dc%d", chan->cosa->num, chan->num);
/* Initialize the chardev data structures */
chardev_channel_init(chan);
/* Register the sppp interface */
sppp_channel_init(chan);
}
static int cosa_probe(int base, int irq, int dma)
{
struct cosa_data *cosa = cosa_cards+nr_cards;
......@@ -576,13 +552,43 @@ static int cosa_probe(int base, int irq, int dma)
/* Initialize the per-channel data */
cosa->chan = kcalloc(cosa->nchannels, sizeof(struct channel_data), GFP_KERNEL);
if (!cosa->chan) {
err = -ENOMEM;
err = -ENOMEM;
goto err_out3;
}
for (i=0; i<cosa->nchannels; i++) {
cosa->chan[i].cosa = cosa;
cosa->chan[i].num = i;
channel_init(cosa->chan+i);
for (i = 0; i < cosa->nchannels; i++) {
struct channel_data *chan = &cosa->chan[i];
chan->cosa = cosa;
chan->num = i;
sprintf(chan->name, "cosa%dc%d", chan->cosa->num, i);
/* Initialize the chardev data structures */
mutex_init(&chan->rlock);
init_MUTEX(&chan->wsem);
/* Register the network interface */
if (!(chan->netdev = alloc_hdlcdev(chan))) {
printk(KERN_WARNING "%s: alloc_hdlcdev failed.\n",
chan->name);
goto err_hdlcdev;
}
dev_to_hdlc(chan->netdev)->attach = cosa_net_attach;
dev_to_hdlc(chan->netdev)->xmit = cosa_net_tx;
chan->netdev->open = cosa_net_open;
chan->netdev->stop = cosa_net_close;
chan->netdev->do_ioctl = cosa_net_ioctl;
chan->netdev->tx_timeout = cosa_net_timeout;
chan->netdev->watchdog_timeo = TX_TIMEOUT;
chan->netdev->base_addr = chan->cosa->datareg;
chan->netdev->irq = chan->cosa->irq;
chan->netdev->dma = chan->cosa->dma;
if (register_hdlc_device(chan->netdev)) {
printk(KERN_WARNING "%s: register_hdlc_device()"
" failed.\n", chan->netdev->name);
free_netdev(chan->netdev);
goto err_hdlcdev;
}
}
printk (KERN_INFO "cosa%d: %s (%s at 0x%x irq %d dma %d), %d channels\n",
......@@ -590,13 +596,20 @@ static int cosa_probe(int base, int irq, int dma)
cosa->datareg, cosa->irq, cosa->dma, cosa->nchannels);
return nr_cards++;
err_hdlcdev:
while (i-- > 0) {
unregister_hdlc_device(cosa->chan[i].netdev);
free_netdev(cosa->chan[i].netdev);
}
kfree(cosa->chan);
err_out3:
kfree(cosa->bouncebuf);
err_out2:
free_dma(cosa->dma);
err_out1:
free_irq(cosa->irq, cosa);
err_out:
err_out:
release_region(cosa->datareg,is_8bit(cosa)?2:4);
printk(KERN_NOTICE "cosa%d: allocating resources failed\n",
cosa->num);
......@@ -604,54 +617,19 @@ err_out:
}
/*---------- SPPP/HDLC netdevice ---------- */
/*---------- network device ---------- */
static void cosa_setup(struct net_device *d)
static int cosa_net_attach(struct net_device *dev, unsigned short encoding,
unsigned short parity)
{
d->open = cosa_sppp_open;
d->stop = cosa_sppp_close;
d->hard_start_xmit = cosa_sppp_tx;
d->do_ioctl = cosa_sppp_ioctl;
d->get_stats = cosa_net_stats;
d->tx_timeout = cosa_sppp_timeout;
d->watchdog_timeo = TX_TIMEOUT;
}
static void sppp_channel_init(struct channel_data *chan)
{
struct net_device *d;
chan->if_ptr = &chan->pppdev;
d = alloc_netdev(0, chan->name, cosa_setup);
if (!d) {
printk(KERN_WARNING "%s: alloc_netdev failed.\n", chan->name);
return;
}
chan->pppdev.dev = d;
d->base_addr = chan->cosa->datareg;
d->irq = chan->cosa->irq;
d->dma = chan->cosa->dma;
d->ml_priv = chan;
sppp_attach(&chan->pppdev);
if (register_netdev(d)) {
printk(KERN_WARNING "%s: register_netdev failed.\n", d->name);
sppp_detach(d);
free_netdev(d);
chan->pppdev.dev = NULL;
return;
}
}
static void sppp_channel_delete(struct channel_data *chan)
{
unregister_netdev(chan->pppdev.dev);
sppp_detach(chan->pppdev.dev);
free_netdev(chan->pppdev.dev);
chan->pppdev.dev = NULL;
if (encoding == ENCODING_NRZ && parity == PARITY_CRC16_PR1_CCITT)
return 0;
return -EINVAL;
}
static int cosa_sppp_open(struct net_device *d)
static int cosa_net_open(struct net_device *dev)
{
struct channel_data *chan = d->ml_priv;
struct channel_data *chan = dev_to_chan(dev);
int err;
unsigned long flags;
......@@ -662,36 +640,35 @@ static int cosa_sppp_open(struct net_device *d)
}
spin_lock_irqsave(&chan->cosa->lock, flags);
if (chan->usage != 0) {
printk(KERN_WARNING "%s: sppp_open called with usage count %d\n",
chan->name, chan->usage);
printk(KERN_WARNING "%s: cosa_net_open called with usage count"
" %d\n", chan->name, chan->usage);
spin_unlock_irqrestore(&chan->cosa->lock, flags);
return -EBUSY;
}
chan->setup_rx = sppp_setup_rx;
chan->tx_done = sppp_tx_done;
chan->rx_done = sppp_rx_done;
chan->usage=-1;
chan->setup_rx = cosa_net_setup_rx;
chan->tx_done = cosa_net_tx_done;
chan->rx_done = cosa_net_rx_done;
chan->usage = -1;
chan->cosa->usage++;
spin_unlock_irqrestore(&chan->cosa->lock, flags);
err = sppp_open(d);
err = hdlc_open(dev);
if (err) {
spin_lock_irqsave(&chan->cosa->lock, flags);
chan->usage=0;
chan->usage = 0;
chan->cosa->usage--;
spin_unlock_irqrestore(&chan->cosa->lock, flags);
return err;
}
netif_start_queue(d);
netif_start_queue(dev);
cosa_enable_rx(chan);
return 0;
}
static int cosa_sppp_tx(struct sk_buff *skb, struct net_device *dev)
static int cosa_net_tx(struct sk_buff *skb, struct net_device *dev)
{
struct channel_data *chan = dev->ml_priv;
struct channel_data *chan = dev_to_chan(dev);
netif_stop_queue(dev);
......@@ -700,16 +677,16 @@ static int cosa_sppp_tx(struct sk_buff *skb, struct net_device *dev)
return 0;
}
static void cosa_sppp_timeout(struct net_device *dev)
static void cosa_net_timeout(struct net_device *dev)
{
struct channel_data *chan = dev->ml_priv;
struct channel_data *chan = dev_to_chan(dev);
if (test_bit(RXBIT, &chan->cosa->rxtx)) {
chan->stats.rx_errors++;
chan->stats.rx_missed_errors++;
chan->netdev->stats.rx_errors++;
chan->netdev->stats.rx_missed_errors++;
} else {
chan->stats.tx_errors++;
chan->stats.tx_aborted_errors++;
chan->netdev->stats.tx_errors++;
chan->netdev->stats.tx_aborted_errors++;
}
cosa_kick(chan->cosa);
if (chan->tx_skb) {
......@@ -719,13 +696,13 @@ static void cosa_sppp_timeout(struct net_device *dev)
netif_wake_queue(dev);
}
static int cosa_sppp_close(struct net_device *d)
static int cosa_net_close(struct net_device *dev)
{
struct channel_data *chan = d->ml_priv;
struct channel_data *chan = dev_to_chan(dev);
unsigned long flags;
netif_stop_queue(d);
sppp_close(d);
netif_stop_queue(dev);
hdlc_close(dev);
cosa_disable_rx(chan);
spin_lock_irqsave(&chan->cosa->lock, flags);
if (chan->rx_skb) {
......@@ -736,13 +713,13 @@ static int cosa_sppp_close(struct net_device *d)
kfree_skb(chan->tx_skb);
chan->tx_skb = NULL;
}
chan->usage=0;
chan->usage = 0;
chan->cosa->usage--;
spin_unlock_irqrestore(&chan->cosa->lock, flags);
return 0;
}
static char *sppp_setup_rx(struct channel_data *chan, int size)
static char *cosa_net_setup_rx(struct channel_data *chan, int size)
{
/*
* We can safely fall back to non-dma-able memory, because we have
......@@ -754,66 +731,53 @@ static char *sppp_setup_rx(struct channel_data *chan, int size)
if (chan->rx_skb == NULL) {
printk(KERN_NOTICE "%s: Memory squeeze, dropping packet\n",
chan->name);
chan->stats.rx_dropped++;
chan->netdev->stats.rx_dropped++;
return NULL;
}
chan->pppdev.dev->trans_start = jiffies;
chan->netdev->trans_start = jiffies;
return skb_put(chan->rx_skb, size);
}
static int sppp_rx_done(struct channel_data *chan)
static int cosa_net_rx_done(struct channel_data *chan)
{
if (!chan->rx_skb) {
printk(KERN_WARNING "%s: rx_done with empty skb!\n",
chan->name);
chan->stats.rx_errors++;
chan->stats.rx_frame_errors++;
chan->netdev->stats.rx_errors++;
chan->netdev->stats.rx_frame_errors++;
return 0;
}
chan->rx_skb->protocol = htons(ETH_P_WAN_PPP);
chan->rx_skb->dev = chan->pppdev.dev;
chan->rx_skb->protocol = hdlc_type_trans(chan->rx_skb, chan->netdev);
chan->rx_skb->dev = chan->netdev;
skb_reset_mac_header(chan->rx_skb);
chan->stats.rx_packets++;
chan->stats.rx_bytes += chan->cosa->rxsize;
chan->netdev->stats.rx_packets++;
chan->netdev->stats.rx_bytes += chan->cosa->rxsize;
netif_rx(chan->rx_skb);
chan->rx_skb = NULL;
chan->pppdev.dev->last_rx = jiffies;
chan->netdev->last_rx = jiffies;
return 0;
}
/* ARGSUSED */
static int sppp_tx_done(struct channel_data *chan, int size)
static int cosa_net_tx_done(struct channel_data *chan, int size)
{
if (!chan->tx_skb) {
printk(KERN_WARNING "%s: tx_done with empty skb!\n",
chan->name);
chan->stats.tx_errors++;
chan->stats.tx_aborted_errors++;
chan->netdev->stats.tx_errors++;
chan->netdev->stats.tx_aborted_errors++;
return 1;
}
dev_kfree_skb_irq(chan->tx_skb);
chan->tx_skb = NULL;
chan->stats.tx_packets++;
chan->stats.tx_bytes += size;
netif_wake_queue(chan->pppdev.dev);
chan->netdev->stats.tx_packets++;
chan->netdev->stats.tx_bytes += size;
netif_wake_queue(chan->netdev);
return 1;
}
static struct net_device_stats *cosa_net_stats(struct net_device *dev)
{
struct channel_data *chan = dev->ml_priv;
return &chan->stats;
}
/*---------- Character device ---------- */
static void chardev_channel_init(struct channel_data *chan)
{
mutex_init(&chan->rlock);
init_MUTEX(&chan->wsem);
}
static ssize_t cosa_read(struct file *file,
char __user *buf, size_t count, loff_t *ppos)
{
......@@ -1223,16 +1187,15 @@ static int cosa_ioctl_common(struct cosa_data *cosa,
return -ENOIOCTLCMD;
}
static int cosa_sppp_ioctl(struct net_device *dev, struct ifreq *ifr,
int cmd)
static int cosa_net_ioctl(struct net_device *dev, struct ifreq *ifr, int cmd)
{
int rv;
struct channel_data *chan = dev->ml_priv;
rv = cosa_ioctl_common(chan->cosa, chan, cmd, (unsigned long)ifr->ifr_data);
if (rv == -ENOIOCTLCMD) {
return sppp_do_ioctl(dev, ifr, cmd);
}
return rv;
struct channel_data *chan = dev_to_chan(dev);
rv = cosa_ioctl_common(chan->cosa, chan, cmd,
(unsigned long)ifr->ifr_data);
if (rv != -ENOIOCTLCMD)
return rv;
return hdlc_ioctl(dev, ifr, cmd);
}
static int cosa_chardev_ioctl(struct inode *inode, struct file *file,
......
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