From aca257530f7d681b953961090ad729c32aa5ad62 Mon Sep 17 00:00:00 2001 From: =?UTF-8?q?Krzysztof=20Ha=C5=82asa?= Date: Tue, 1 Jul 2008 23:40:29 +0200 Subject: WAN: Port COSA driver to generic HDLC. MIME-Version: 1.0 Content-Type: text/plain; charset=UTF-8 Content-Transfer-Encoding: 8bit Signed-off-by: Krzysztof Hałasa --- drivers/net/wan/Kconfig | 2 +- drivers/net/wan/Makefile | 2 +- drivers/net/wan/cosa.c | 293 +++++++++++++++++++++-------------------------- 3 files changed, 130 insertions(+), 167 deletions(-) diff --git a/drivers/net/wan/Kconfig b/drivers/net/wan/Kconfig index 846be60e782..e08cd4bf7f5 100644 --- a/drivers/net/wan/Kconfig +++ b/drivers/net/wan/Kconfig @@ -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. diff --git a/drivers/net/wan/Makefile b/drivers/net/wan/Makefile index 94c1d474e30..9d085e0f0f4 100644 --- a/drivers/net/wan/Makefile +++ b/drivers/net/wan/Makefile @@ -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 diff --git a/drivers/net/wan/cosa.c b/drivers/net/wan/cosa.c index 5827324e9d9..e38b7acc52d 100644 --- a/drivers/net/wan/cosa.c +++ b/drivers/net/wan/cosa.c @@ -2,6 +2,7 @@ /* * Copyright (C) 1995-1997 Jan "Yenya" Kasprzak + * Generic HDLC port Copyright (C) 2008 Krzysztof Halasa * * 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 - * fixed a deadlock in cosa_sppp_open - */ - -/* ---------- Headers, macros, data structures ---------- */ #include #include @@ -86,6 +81,7 @@ #include #include #include +#include #include #include #include @@ -93,14 +89,12 @@ #include #include #include - -#undef COSA_SLOW_IO /* for testing purposes only */ - #include #include #include -#include +#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 \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; inchannels; 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; inchannels; 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, -- cgit v1.2.3