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Commit 2b2fea83 authored by Paul Fulghum's avatar Paul Fulghum Committed by Linus Torvalds
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[PATCH] synclink_cs.c: replace syncppp with genhdlc 

Replace syncppp interface with generic HDLC interface.  Generic HDLC
provides superset of syncppp function.
Signed-off-by: default avatarPaul Fulghum <paulkf@microgate.com>
Signed-off-by: default avatarAndrew Morton <akpm@osdl.org>
Signed-off-by: default avatarLinus Torvalds <torvalds@osdl.org>
parent cc367a58
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Showing with 373 additions and 186 deletions
drivers/char/pcmcia/synclink_cs.c
View file @ 2b2fea83
/*
* linux/drivers/char/pcmcia/synclink_cs.c
*
* $Id: synclink_cs.c,v 4.22 2004/06/01 20:27:46 paulkf Exp $
* $Id: synclink_cs.c,v 4.26 2004/08/11 19:30:02 paulkf Exp $
*
* Device driver for Microgate SyncLink PC Card
* multiprotocol serial adapter.
......@@ -68,6 +68,7 @@
#include <asm/types.h>
#include <linux/termios.h>
#include <linux/workqueue.h>
#include <linux/hdlc.h>
#include <pcmcia/version.h>
#include <pcmcia/cs_types.h>
......@@ -76,12 +77,8 @@
#include <pcmcia/cisreg.h>
#include <pcmcia/ds.h>
#ifdef CONFIG_SYNCLINK_SYNCPPP_MODULE
#define CONFIG_SYNCLINK_SYNCPPP 1
#endif
#ifdef CONFIG_SYNCLINK_SYNCPPP
#include <net/syncppp.h>
#ifdef CONFIG_HDLC_MODULE
#define CONFIG_HDLC 1
#endif
#define GET_USER(error,value,addr) error = get_user(value,addr)
......@@ -239,12 +236,11 @@ typedef struct _mgslpc_info {
int netcount;
int dosyncppp;
spinlock_t netlock;
#ifdef CONFIG_SYNCLINK_SYNCPPP
struct ppp_device pppdev;
char netname[10];
#ifdef CONFIG_HDLC
struct net_device *netdev;
struct net_device_stats netstats;
#endif
} MGSLPC_INFO;
#define MGSLPC_MAGIC 0x5402
......@@ -398,18 +394,12 @@ static void tx_timeout(unsigned long context);
static int ioctl_common(MGSLPC_INFO *info, unsigned int cmd, unsigned long arg);
#ifdef CONFIG_SYNCLINK_SYNCPPP
/* SPPP/HDLC stuff */
static void mgslpc_sppp_init(MGSLPC_INFO *info);
static void mgslpc_sppp_delete(MGSLPC_INFO *info);
static int mgslpc_sppp_open(struct net_device *d);
static int mgslpc_sppp_close(struct net_device *d);
static void mgslpc_sppp_tx_timeout(struct net_device *d);
static int mgslpc_sppp_tx(struct sk_buff *skb, struct net_device *d);
static void mgslpc_sppp_rx_done(MGSLPC_INFO *info, char *buf, int size);
static void mgslpc_sppp_tx_done(MGSLPC_INFO *info);
static int mgslpc_sppp_ioctl(struct net_device *dev, struct ifreq *ifr, int cmd);
struct net_device_stats *mgslpc_net_stats(struct net_device *dev);
#ifdef CONFIG_HDLC
#define dev_to_port(D) (dev_to_hdlc(D)->priv)
static void hdlcdev_tx_done(MGSLPC_INFO *info);
static void hdlcdev_rx(MGSLPC_INFO *info, char *buf, int size);
static int hdlcdev_init(MGSLPC_INFO *info);
static void hdlcdev_exit(MGSLPC_INFO *info);
#endif
static void trace_block(MGSLPC_INFO *info,const char* data, int count, int xmit);
......@@ -494,7 +484,7 @@ MODULE_PARM(dosyncppp,"1-" __MODULE_STRING(MAX_DEVICE_COUNT) "i");
MODULE_LICENSE("GPL");
static char *driver_name = "SyncLink PC Card driver";
static char *driver_version = "$Revision: 4.22 $";
static char *driver_version = "$Revision: 4.26 $";
static struct tty_driver *serial_driver;
......@@ -1163,9 +1153,9 @@ void tx_done(MGSLPC_INFO *info)
info->drop_rts_on_tx_done = 0;
}
#ifdef CONFIG_SYNCLINK_SYNCPPP
#ifdef CONFIG_HDLC
if (info->netcount)
mgslpc_sppp_tx_done(info);
hdlcdev_tx_done(info);
else
#endif
{
......@@ -1271,13 +1261,13 @@ void dcd_change(MGSLPC_INFO *info)
info->icount.dcd++;
if (info->serial_signals & SerialSignal_DCD) {
info->input_signal_events.dcd_up++;
#ifdef CONFIG_SYNCLINK_SYNCPPP
if (info->netcount)
sppp_reopen(info->netdev);
#endif
}
else
info->input_signal_events.dcd_down++;
#ifdef CONFIG_HDLC
if (info->netcount)
hdlc_set_carrier(info->serial_signals & SerialSignal_DCD, info->netdev);
#endif
wake_up_interruptible(&info->status_event_wait_q);
wake_up_interruptible(&info->event_wait_q);
......@@ -2876,7 +2866,7 @@ static int mgslpc_open(struct tty_struct *tty, struct file * filp)
cleanup:
if (retval) {
if (tty->count == 1)
info->tty = NULL;/* tty layer will release tty struct */
info->tty = NULL; /* tty layer will release tty struct */
if(info->count)
info->count--;
}
......@@ -2931,7 +2921,7 @@ static inline int line_info(char *buf, MGSLPC_INFO *info)
if (info->icount.rxover)
ret += sprintf(buf+ret, " rxover:%d", info->icount.rxover);
if (info->icount.rxcrc)
ret += sprintf(buf+ret, " rxlong:%d", info->icount.rxcrc);
ret += sprintf(buf+ret, " rxcrc:%d", info->icount.rxcrc);
} else {
ret += sprintf(buf+ret, " ASYNC tx:%d rx:%d",
info->icount.tx, info->icount.rx);
......@@ -3070,12 +3060,8 @@ void mgslpc_add_device(MGSLPC_INFO *info)
printk( "SyncLink PC Card %s:IO=%04X IRQ=%d\n",
info->device_name, info->io_base, info->irq_level);
#ifdef CONFIG_SYNCLINK_SYNCPPP
#ifdef MODULE
if (info->dosyncppp)
#endif
mgslpc_sppp_init(info);
#ifdef CONFIG_HDLC
hdlcdev_init(info);
#endif
}
......@@ -3090,9 +3076,8 @@ void mgslpc_remove_device(MGSLPC_INFO *remove_info)
last->next_device = info->next_device;
else
mgslpc_device_list = info->next_device;
#ifdef CONFIG_SYNCLINK_SYNCPPP
if (info->dosyncppp)
mgslpc_sppp_delete(info);
#ifdef CONFIG_HDLC
hdlcdev_exit(info);
#endif
release_resources(info);
kfree(info);
......@@ -4021,9 +4006,12 @@ int rx_get_frame(MGSLPC_INFO *info)
return_frame = 1;
}
framesize = 0;
#ifdef CONFIG_SYNCLINK_SYNCPPP
info->netstats.rx_errors++;
info->netstats.rx_frame_errors++;
#ifdef CONFIG_HDLC
{
struct net_device_stats *stats = hdlc_stats(info->netdev);
stats->rx_errors++;
stats->rx_frame_errors++;
}
#endif
} else
return_frame = 1;
......@@ -4052,11 +4040,9 @@ int rx_get_frame(MGSLPC_INFO *info)
++framesize;
}
#ifdef CONFIG_SYNCLINK_SYNCPPP
if (info->netcount) {
/* pass frame to syncppp device */
mgslpc_sppp_rx_done(info, buf->data, framesize);
}
#ifdef CONFIG_HDLC
if (info->netcount)
hdlcdev_rx(info, buf->data, framesize);
else
#endif
{
......@@ -4215,88 +4201,134 @@ void tx_timeout(unsigned long context)
spin_unlock_irqrestore(&info->lock,flags);
#ifdef CONFIG_SYNCLINK_SYNCPPP
#ifdef CONFIG_HDLC
if (info->netcount)
mgslpc_sppp_tx_done(info);
hdlcdev_tx_done(info);
else
#endif
bh_transmit(info);
}
#ifdef CONFIG_SYNCLINK_SYNCPPP
/* syncppp net device routines
*/
static void mgslpc_setup(struct net_device *dev)
{
dev->open = mgslpc_sppp_open;
dev->stop = mgslpc_sppp_close;
dev->hard_start_xmit = mgslpc_sppp_tx;
dev->do_ioctl = mgslpc_sppp_ioctl;
dev->get_stats = mgslpc_net_stats;
dev->tx_timeout = mgslpc_sppp_tx_timeout;
dev->watchdog_timeo = 10*HZ;
}
#ifdef CONFIG_HDLC
void mgslpc_sppp_init(MGSLPC_INFO *info)
/**
* called by generic HDLC layer when protocol selected (PPP, frame relay, etc.)
* set encoding and frame check sequence (FCS) options
*
* dev pointer to network device structure
* encoding serial encoding setting
* parity FCS setting
*
* returns 0 if success, otherwise error code
*/
static int hdlcdev_attach(struct net_device *dev, unsigned short encoding,
unsigned short parity)
{
struct net_device *d;
MGSLPC_INFO *info = dev_to_port(dev);
unsigned char new_encoding;
unsigned short new_crctype;
sprintf(info->netname,"mgslp%d",info->line);
/* return error if TTY interface open */
if (info->count)
return -EBUSY;
d = alloc_netdev(0, info->netname, mgslpc_setup);
if (!d) {
printk(KERN_WARNING "%s: alloc_netdev failed.\n",
info->netname);
return;
switch (encoding)
{
case ENCODING_NRZ: new_encoding = HDLC_ENCODING_NRZ; break;
case ENCODING_NRZI: new_encoding = HDLC_ENCODING_NRZI_SPACE; break;
case ENCODING_FM_MARK: new_encoding = HDLC_ENCODING_BIPHASE_MARK; break;
case ENCODING_FM_SPACE: new_encoding = HDLC_ENCODING_BIPHASE_SPACE; break;
case ENCODING_MANCHESTER: new_encoding = HDLC_ENCODING_BIPHASE_LEVEL; break;
default: return -EINVAL;
}
info->if_ptr = &info->pppdev;
info->netdev = info->pppdev.dev = d;
d->base_addr = info->io_base;
d->irq = info->irq_level;
d->priv = info;
switch (parity)
{
case PARITY_NONE: new_crctype = HDLC_CRC_NONE; break;
case PARITY_CRC16_PR1_CCITT: new_crctype = HDLC_CRC_16_CCITT; break;
case PARITY_CRC32_PR1_CCITT: new_crctype = HDLC_CRC_32_CCITT; break;
default: return -EINVAL;
}
sppp_attach(&info->pppdev);
mgslpc_setup(d);
info->params.encoding = new_encoding;
info->params.crc_type = new_crctype;;
if (register_netdev(d)) {
printk(KERN_WARNING "%s: register_netdev failed.\n", d->name);
sppp_detach(info->netdev);
info->netdev = NULL;
info->pppdev.dev = NULL;
free_netdev(d);
return;
}
/* if network interface up, reprogram hardware */
if (info->netcount)
mgslpc_program_hw(info);
if (debug_level >= DEBUG_LEVEL_INFO)
printk("mgslpc_sppp_init()\n");
return 0;
}
void mgslpc_sppp_delete(MGSLPC_INFO *info)
/**
* called by generic HDLC layer to send frame
*
* skb socket buffer containing HDLC frame
* dev pointer to network device structure
*
* returns 0 if success, otherwise error code
*/
static int hdlcdev_xmit(struct sk_buff *skb, struct net_device *dev)
{
MGSLPC_INFO *info = dev_to_port(dev);
struct net_device_stats *stats = hdlc_stats(dev);
unsigned long flags;
if (debug_level >= DEBUG_LEVEL_INFO)
printk("mgslpc_sppp_delete(%s)\n",info->netname);
unregister_netdev(info->netdev);
sppp_detach(info->netdev);
free_netdev(info->netdev);
info->netdev = NULL;
info->pppdev.dev = NULL;
printk(KERN_INFO "%s:hdlc_xmit(%s)\n",__FILE__,dev->name);
/* stop sending until this frame completes */
netif_stop_queue(dev);
/* copy data to device buffers */
memcpy(info->tx_buf, skb->data, skb->len);
info->tx_get = 0;
info->tx_put = info->tx_count = skb->len;
/* update network statistics */
stats->tx_packets++;
stats->tx_bytes += skb->len;
/* done with socket buffer, so free it */
dev_kfree_skb(skb);
/* save start time for transmit timeout detection */
dev->trans_start = jiffies;
/* start hardware transmitter if necessary */
spin_lock_irqsave(&info->lock,flags);
if (!info->tx_active)
tx_start(info);
spin_unlock_irqrestore(&info->lock,flags);
return 0;
}
int mgslpc_sppp_open(struct net_device *d)
/**
* called by network layer when interface enabled
* claim resources and initialize hardware
*
* dev pointer to network device structure
*
* returns 0 if success, otherwise error code
*/
static int hdlcdev_open(struct net_device *dev)
{
MGSLPC_INFO *info = d->priv;
int err;
MGSLPC_INFO *info = dev_to_port(dev);
int rc;
unsigned long flags;
if (debug_level >= DEBUG_LEVEL_INFO)
printk("mgslpc_sppp_open(%s)\n",info->netname);
printk("%s:hdlcdev_open(%s)\n",__FILE__,dev->name);
/* generic HDLC layer open processing */
if ((rc = hdlc_open(dev)))
return rc;
/* arbitrate between network and tty opens */
spin_lock_irqsave(&info->netlock, flags);
if (info->count != 0 || info->netcount != 0) {
printk(KERN_WARNING "%s: sppp_open returning busy\n", info->netname);
printk(KERN_WARNING "%s: hdlc_open returning busy\n", dev->name);
spin_unlock_irqrestore(&info->netlock, flags);
return -EBUSY;
}
......@@ -4304,142 +4336,297 @@ int mgslpc_sppp_open(struct net_device *d)
spin_unlock_irqrestore(&info->netlock, flags);
/* claim resources and init adapter */
if ((err = startup(info)) != 0)
goto open_fail;
/* allow syncppp module to do open processing */
if ((err = sppp_open(d)) != 0) {
shutdown(info);
goto open_fail;
if ((rc = startup(info)) != 0) {
spin_lock_irqsave(&info->netlock, flags);
info->netcount=0;
spin_unlock_irqrestore(&info->netlock, flags);
return rc;
}
/* assert DTR and RTS, apply hardware settings */
info->serial_signals |= SerialSignal_RTS + SerialSignal_DTR;
mgslpc_program_hw(info);
d->trans_start = jiffies;
netif_start_queue(d);
return 0;
/* enable network layer transmit */
dev->trans_start = jiffies;
netif_start_queue(dev);
open_fail:
spin_lock_irqsave(&info->netlock, flags);
info->netcount=0;
spin_unlock_irqrestore(&info->netlock, flags);
return err;
/* inform generic HDLC layer of current DCD status */
spin_lock_irqsave(&info->lock, flags);
get_signals(info);
spin_unlock_irqrestore(&info->lock, flags);
hdlc_set_carrier(info->serial_signals & SerialSignal_DCD, dev);
return 0;
}
void mgslpc_sppp_tx_timeout(struct net_device *dev)
/**
* called by network layer when interface is disabled
* shutdown hardware and release resources
*
* dev pointer to network device structure
*
* returns 0 if success, otherwise error code
*/
static int hdlcdev_close(struct net_device *dev)
{
MGSLPC_INFO *info = dev->priv;
MGSLPC_INFO *info = dev_to_port(dev);
unsigned long flags;
if (debug_level >= DEBUG_LEVEL_INFO)
printk("mgslpc_sppp_tx_timeout(%s)\n",info->netname);
printk("%s:hdlcdev_close(%s)\n",__FILE__,dev->name);
info->netstats.tx_errors++;
info->netstats.tx_aborted_errors++;
netif_stop_queue(dev);
spin_lock_irqsave(&info->lock,flags);
tx_stop(info);
spin_unlock_irqrestore(&info->lock,flags);
/* shutdown adapter and release resources */
shutdown(info);
netif_wake_queue(dev);
hdlc_close(dev);
spin_lock_irqsave(&info->netlock, flags);
info->netcount=0;
spin_unlock_irqrestore(&info->netlock, flags);
return 0;
}
int mgslpc_sppp_tx(struct sk_buff *skb, struct net_device *dev)
/**
* called by network layer to process IOCTL call to network device
*
* dev pointer to network device structure
* ifr pointer to network interface request structure
* cmd IOCTL command code
*
* returns 0 if success, otherwise error code
*/
static int hdlcdev_ioctl(struct net_device *dev, struct ifreq *ifr, int cmd)
{
MGSLPC_INFO *info = dev->priv;
unsigned long flags;
const size_t size = sizeof(sync_serial_settings);
sync_serial_settings new_line;
sync_serial_settings __user *line = ifr->ifr_settings.ifs_ifsu.sync;
MGSLPC_INFO *info = dev_to_port(dev);
unsigned int flags;
if (debug_level >= DEBUG_LEVEL_INFO)
printk("mgslpc_sppp_tx(%s)\n",info->netname);
printk("%s:hdlcdev_ioctl(%s)\n",__FILE__,dev->name);
netif_stop_queue(dev);
/* return error if TTY interface open */
if (info->count)
return -EBUSY;
info->tx_count = skb->len;
if (cmd != SIOCWANDEV)
return hdlc_ioctl(dev, ifr, cmd);
memcpy(info->tx_buf, skb->data, skb->len);
info->tx_get = 0;
info->tx_put = info->tx_count = skb->len;
switch(ifr->ifr_settings.type) {
case IF_GET_IFACE: /* return current sync_serial_settings */
info->netstats.tx_packets++;
info->netstats.tx_bytes += skb->len;
dev_kfree_skb(skb);
ifr->ifr_settings.type = IF_IFACE_SYNC_SERIAL;
if (ifr->ifr_settings.size < size) {
ifr->ifr_settings.size = size; /* data size wanted */
return -ENOBUFS;
}
dev->trans_start = jiffies;
flags = info->params.flags & (HDLC_FLAG_RXC_RXCPIN | HDLC_FLAG_RXC_DPLL |
HDLC_FLAG_RXC_BRG | HDLC_FLAG_RXC_TXCPIN |
HDLC_FLAG_TXC_TXCPIN | HDLC_FLAG_TXC_DPLL |
HDLC_FLAG_TXC_BRG | HDLC_FLAG_TXC_RXCPIN);
spin_lock_irqsave(&info->lock,flags);
if (!info->tx_active)
tx_start(info);
spin_unlock_irqrestore(&info->lock,flags);
switch (flags){
case (HDLC_FLAG_RXC_RXCPIN | HDLC_FLAG_TXC_TXCPIN): new_line.clock_type = CLOCK_EXT; break;
case (HDLC_FLAG_RXC_BRG | HDLC_FLAG_TXC_BRG): new_line.clock_type = CLOCK_INT; break;
case (HDLC_FLAG_RXC_RXCPIN | HDLC_FLAG_TXC_BRG): new_line.clock_type = CLOCK_TXINT; break;
case (HDLC_FLAG_RXC_RXCPIN | HDLC_FLAG_TXC_RXCPIN): new_line.clock_type = CLOCK_TXFROMRX; break;
default: new_line.clock_type = CLOCK_DEFAULT;
}
new_line.clock_rate = info->params.clock_speed;
new_line.loopback = info->params.loopback ? 1:0;
if (copy_to_user(line, &new_line, size))
return -EFAULT;
return 0;
case IF_IFACE_SYNC_SERIAL: /* set sync_serial_settings */
if(!capable(CAP_NET_ADMIN))
return -EPERM;
if (copy_from_user(&new_line, line, size))
return -EFAULT;
switch (new_line.clock_type)
{
case CLOCK_EXT: flags = HDLC_FLAG_RXC_RXCPIN | HDLC_FLAG_TXC_TXCPIN; break;
case CLOCK_TXFROMRX: flags = HDLC_FLAG_RXC_RXCPIN | HDLC_FLAG_TXC_RXCPIN; break;
case CLOCK_INT: flags = HDLC_FLAG_RXC_BRG | HDLC_FLAG_TXC_BRG; break;
case CLOCK_TXINT: flags = HDLC_FLAG_RXC_RXCPIN | HDLC_FLAG_TXC_BRG; break;
case CLOCK_DEFAULT: flags = info->params.flags &
(HDLC_FLAG_RXC_RXCPIN | HDLC_FLAG_RXC_DPLL |
HDLC_FLAG_RXC_BRG | HDLC_FLAG_RXC_TXCPIN |
HDLC_FLAG_TXC_TXCPIN | HDLC_FLAG_TXC_DPLL |
HDLC_FLAG_TXC_BRG | HDLC_FLAG_TXC_RXCPIN); break;
default: return -EINVAL;
}
if (new_line.loopback != 0 && new_line.loopback != 1)
return -EINVAL;
info->params.flags &= ~(HDLC_FLAG_RXC_RXCPIN | HDLC_FLAG_RXC_DPLL |
HDLC_FLAG_RXC_BRG | HDLC_FLAG_RXC_TXCPIN |
HDLC_FLAG_TXC_TXCPIN | HDLC_FLAG_TXC_DPLL |
HDLC_FLAG_TXC_BRG | HDLC_FLAG_TXC_RXCPIN);
info->params.flags |= flags;
info->params.loopback = new_line.loopback;
if (flags & (HDLC_FLAG_RXC_BRG | HDLC_FLAG_TXC_BRG))
info->params.clock_speed = new_line.clock_rate;
else
info->params.clock_speed = 0;
/* if network interface up, reprogram hardware */
if (info->netcount)
mgslpc_program_hw(info);
return 0;
default:
return hdlc_ioctl(dev, ifr, cmd);
}
}
int mgslpc_sppp_close(struct net_device *d)
/**
* called by network layer when transmit timeout is detected
*
* dev pointer to network device structure
*/
static void hdlcdev_tx_timeout(struct net_device *dev)
{
MGSLPC_INFO *info = d->priv;
MGSLPC_INFO *info = dev_to_port(dev);
struct net_device_stats *stats = hdlc_stats(dev);
unsigned long flags;
if (debug_level >= DEBUG_LEVEL_INFO)
printk("mgslpc_sppp_close(%s)\n",info->netname);
printk("hdlcdev_tx_timeout(%s)\n",dev->name);
/* shutdown adapter and release resources */
shutdown(info);
stats->tx_errors++;
stats->tx_aborted_errors++;
spin_lock_irqsave(&info->lock,flags);
tx_stop(info);
spin_unlock_irqrestore(&info->lock,flags);
/* allow syncppp to do close processing */
sppp_close(d);
netif_stop_queue(d);
netif_wake_queue(dev);
}
spin_lock_irqsave(&info->netlock, flags);
info->netcount=0;
spin_unlock_irqrestore(&info->netlock, flags);
return 0;
/**
* called by device driver when transmit completes
* reenable network layer transmit if stopped
*
* info pointer to device instance information
*/
static void hdlcdev_tx_done(MGSLPC_INFO *info)
{
if (netif_queue_stopped(info->netdev))
netif_wake_queue(info->netdev);
}
void mgslpc_sppp_rx_done(MGSLPC_INFO *info, char *buf, int size)
/**
* called by device driver when frame received
* pass frame to network layer
*
* info pointer to device instance information
* buf pointer to buffer contianing frame data
* size count of data bytes in buf
*/
static void hdlcdev_rx(MGSLPC_INFO *info, char *buf, int size)
{
struct sk_buff *skb = dev_alloc_skb(size);
struct net_device *dev = info->netdev;
struct net_device_stats *stats = hdlc_stats(dev);
if (debug_level >= DEBUG_LEVEL_INFO)
printk("mgslpc_sppp_rx_done(%s)\n",info->netname);
printk("hdlcdev_rx(%s)\n",dev->name);
if (skb == NULL) {
printk(KERN_NOTICE "%s: can't alloc skb, dropping packet\n",
info->netname);
info->netstats.rx_dropped++;
printk(KERN_NOTICE "%s: can't alloc skb, dropping packet\n", dev->name);
stats->rx_dropped++;
return;
}
memcpy(skb_put(skb, size),buf,size);
skb->protocol = htons(ETH_P_WAN_PPP);
skb->dev = info->netdev;
skb->mac.raw = skb->data;
info->netstats.rx_packets++;
info->netstats.rx_bytes += size;
skb->protocol = hdlc_type_trans(skb, skb->dev);
stats->rx_packets++;
stats->rx_bytes += size;
netif_rx(skb);
info->netdev->trans_start = jiffies;
}
void mgslpc_sppp_tx_done(MGSLPC_INFO *info)
{
if (netif_queue_stopped(info->netdev))
netif_wake_queue(info->netdev);
info->netdev->last_rx = jiffies;
}
struct net_device_stats *mgslpc_net_stats(struct net_device *dev)
/**
* called by device driver when adding device instance
* do generic HDLC initialization
*
* info pointer to device instance information
*
* returns 0 if success, otherwise error code
*/
static int hdlcdev_init(MGSLPC_INFO *info)
{
MGSLPC_INFO *info = dev->priv;
if (debug_level >= DEBUG_LEVEL_INFO)
printk("mgslpc_net_stats(%s)\n",info->netname);
return &info->netstats;
int rc;
struct net_device *dev;
hdlc_device *hdlc;
/* allocate and initialize network and HDLC layer objects */
if (!(dev = alloc_hdlcdev(info))) {
printk(KERN_ERR "%s:hdlc device allocation failure\n",__FILE__);
return -ENOMEM;
}
/* for network layer reporting purposes only */
dev->base_addr = info->io_base;
dev->irq = info->irq_level;
/* network layer callbacks and settings */
dev->do_ioctl = hdlcdev_ioctl;
dev->open = hdlcdev_open;
dev->stop = hdlcdev_close;
dev->tx_timeout = hdlcdev_tx_timeout;
dev->watchdog_timeo = 10*HZ;
dev->tx_queue_len = 50;
/* generic HDLC layer callbacks and settings */
hdlc = dev_to_hdlc(dev);
hdlc->attach = hdlcdev_attach;
hdlc->xmit = hdlcdev_xmit;
/* register objects with HDLC layer */
if ((rc = register_hdlc_device(dev))) {
printk(KERN_WARNING "%s:unable to register hdlc device\n",__FILE__);
free_netdev(dev);
return rc;
}
info->netdev = dev;
return 0;
}
int mgslpc_sppp_ioctl(struct net_device *dev, struct ifreq *ifr, int cmd)
/**
* called by device driver when removing device instance
* do generic HDLC cleanup
*
* info pointer to device instance information
*/
static void hdlcdev_exit(MGSLPC_INFO *info)
{
MGSLPC_INFO *info = dev->priv;
if (debug_level >= DEBUG_LEVEL_INFO)
printk("%s(%d):mgslpc_ioctl %s cmd=%08X\n", __FILE__,__LINE__,
info->netname, cmd );
return sppp_do_ioctl(dev, ifr, cmd);
unregister_hdlc_device(info->netdev);
free_netdev(info->netdev);
info->netdev = NULL;
}
#endif /* ifdef CONFIG_SYNCLINK_SYNCPPP */
#endif /* CONFIG_HDLC */
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