cregit-Linux how code gets into the kernel

Release 4.11 drivers/net/plip/plip.c

Directory: drivers/net/plip
/* $Id: plip.c,v 1.3.6.2 1997/04/16 15:07:56 phil Exp $ */
/* PLIP: A parallel port "network" driver for Linux. */
/* This driver is for parallel port with 5-bit cable (LapLink (R) cable). */
/*
 * Authors:     Donald Becker <becker@scyld.com>
 *              Tommy Thorn <thorn@daimi.aau.dk>
 *              Tanabe Hiroyasu <hiro@sanpo.t.u-tokyo.ac.jp>
 *              Alan Cox <gw4pts@gw4pts.ampr.org>
 *              Peter Bauer <100136.3530@compuserve.com>
 *              Niibe Yutaka <gniibe@mri.co.jp>
 *              Nimrod Zimerman <zimerman@mailandnews.com>
 *
 * Enhancements:
 *              Modularization and ifreq/ifmap support by Alan Cox.
 *              Rewritten by Niibe Yutaka.
 *              parport-sharing awareness code by Philip Blundell.
 *              SMP locking by Niibe Yutaka.
 *              Support for parallel ports with no IRQ (poll mode),
 *              Modifications to use the parallel port API
 *              by Nimrod Zimerman.
 *
 * Fixes:
 *              Niibe Yutaka
 *                - Module initialization.
 *                - MTU fix.
 *                - Make sure other end is OK, before sending a packet.
 *                - Fix immediate timer problem.
 *
 *              Al Viro
 *                - Changed {enable,disable}_irq handling to make it work
 *                  with new ("stack") semantics.
 *
 *              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 the Free Software Foundation; either version
 *              2 of the License, or (at your option) any later version.
 */

/*
 * Original version and the name 'PLIP' from Donald Becker <becker@scyld.com>
 * inspired by Russ Nelson's parallel port packet driver.
 *
 * NOTE:
 *     Tanabe Hiroyasu had changed the protocol, and it was in Linux v1.0.
 *     Because of the necessity to communicate to DOS machines with the
 *     Crynwr packet driver, Peter Bauer changed the protocol again
 *     back to original protocol.
 *
 *     This version follows original PLIP protocol.
 *     So, this PLIP can't communicate the PLIP of Linux v1.0.
 */

/*
 *     To use with DOS box, please do (Turn on ARP switch):
 *      # ifconfig plip[0-2] arp
 */

static const char version[] = "NET3 PLIP version 2.4-parport gniibe@mri.co.jp\n";

/*
  Sources:
        Ideas and protocols came from Russ Nelson's <nelson@crynwr.com>
        "parallel.asm" parallel port packet driver.

  The "Crynwr" parallel port standard specifies the following protocol:
    Trigger by sending nibble '0x8' (this causes interrupt on other end)
    count-low octet
    count-high octet
    ... data octets
    checksum octet
  Each octet is sent as <wait for rx. '0x1?'> <send 0x10+(octet&0x0F)>
                        <wait for rx. '0x0?'> <send 0x00+((octet>>4)&0x0F)>

  The packet is encapsulated as if it were ethernet.

  The cable used is a de facto standard parallel null cable -- sold as
  a "LapLink" cable by various places.  You'll need a 12-conductor cable to
  make one yourself.  The wiring is:
    SLCTIN      17 - 17
    GROUND      25 - 25
    D0->ERROR   2 - 15          15 - 2
    D1->SLCT    3 - 13          13 - 3
    D2->PAPOUT  4 - 12          12 - 4
    D3->ACK     5 - 10          10 - 5
    D4->BUSY    6 - 11          11 - 6
  Do not connect the other pins.  They are
    D5,D6,D7 are 7,8,9
    STROBE is 1, FEED is 14, INIT is 16
    extra grounds are 18,19,20,21,22,23,24
*/

#include <linux/module.h>
#include <linux/kernel.h>
#include <linux/types.h>
#include <linux/fcntl.h>
#include <linux/interrupt.h>
#include <linux/string.h>
#include <linux/slab.h>
#include <linux/if_ether.h>
#include <linux/in.h>
#include <linux/errno.h>
#include <linux/delay.h>
#include <linux/init.h>
#include <linux/netdevice.h>
#include <linux/etherdevice.h>
#include <linux/inetdevice.h>
#include <linux/skbuff.h>
#include <linux/if_plip.h>
#include <linux/workqueue.h>
#include <linux/spinlock.h>
#include <linux/completion.h>
#include <linux/parport.h>
#include <linux/bitops.h>

#include <net/neighbour.h>

#include <asm/irq.h>
#include <asm/byteorder.h>

/* Maximum number of devices to support. */

#define PLIP_MAX  8

/* Use 0 for production, 1 for verification, >2 for debug */
#ifndef NET_DEBUG

#define NET_DEBUG 1
#endif

static const unsigned int net_debug = NET_DEBUG;


#define ENABLE(irq)  if (irq != -1) enable_irq(irq)

#define DISABLE(irq) if (irq != -1) disable_irq(irq)

/* In micro second */

#define PLIP_DELAY_UNIT		   1

/* Connection time out = PLIP_TRIGGER_WAIT * PLIP_DELAY_UNIT usec */

#define PLIP_TRIGGER_WAIT	 500

/* Nibble time out = PLIP_NIBBLE_WAIT * PLIP_DELAY_UNIT usec */

#define PLIP_NIBBLE_WAIT        3000

/* Bottom halves */
static void plip_kick_bh(struct work_struct *work);
static void plip_bh(struct work_struct *work);
static void plip_timer_bh(struct work_struct *work);

/* Interrupt handler */
static void plip_interrupt(void *dev_id);

/* Functions for DEV methods */
static int plip_tx_packet(struct sk_buff *skb, struct net_device *dev);
static int plip_hard_header(struct sk_buff *skb, struct net_device *dev,
                            unsigned short type, const void *daddr,
			    const void *saddr, unsigned len);
static int plip_hard_header_cache(const struct neighbour *neigh,
                                  struct hh_cache *hh, __be16 type);
static int plip_open(struct net_device *dev);
static int plip_close(struct net_device *dev);
static int plip_ioctl(struct net_device *dev, struct ifreq *ifr, int cmd);
static int plip_preempt(void *handle);
static void plip_wakeup(void *handle);


enum plip_connection_state {
	
PLIP_CN_NONE=0,
	
PLIP_CN_RECEIVE,
	
PLIP_CN_SEND,
	
PLIP_CN_CLOSING,
	
PLIP_CN_ERROR
};


enum plip_packet_state {
	
PLIP_PK_DONE=0,
	
PLIP_PK_TRIGGER,
	
PLIP_PK_LENGTH_LSB,
	
PLIP_PK_LENGTH_MSB,
	
PLIP_PK_DATA,
	
PLIP_PK_CHECKSUM
};


enum plip_nibble_state {
	
PLIP_NB_BEGIN,
	
PLIP_NB_1,
	
PLIP_NB_2,
};


struct plip_local {
	
enum plip_packet_state state;
	
enum plip_nibble_state nibble;
	union {
		struct {
#if defined(__LITTLE_ENDIAN)
			
unsigned char lsb;
			
unsigned char msb;
#elif defined(__BIG_ENDIAN)
			unsigned char msb;
			unsigned char lsb;
#else
#error	"Please fix the endianness defines in <asm/byteorder.h>"
#endif
		} 
b;
		
unsigned short h;
	} 
length;
	
unsigned short byte;
	
unsigned char  checksum;
	
unsigned char  data;
	
struct sk_buff *skb;
};


struct net_local {
	
struct net_device *dev;
	
struct work_struct immediate;
	
struct delayed_work deferred;
	
struct delayed_work timer;
	
struct plip_local snd_data;
	
struct plip_local rcv_data;
	
struct pardevice *pardev;
	
unsigned long  trigger;
	
unsigned long  nibble;
	
enum plip_connection_state connection;
	
unsigned short timeout_count;
	
int is_deferred;
	
int port_owner;
	
int should_relinquish;
	
spinlock_t lock;
	
atomic_t kill_timer;
	
struct completion killed_timer_cmp;
};




static inline void enable_parport_interrupts (struct net_device *dev)
{
	if (dev->irq != -1)
	{
		struct parport *port =
		   ((struct net_local *)netdev_priv(dev))->pardev->port;
		port->ops->enable_irq (port);
	}
}


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static inline void disable_parport_interrupts (struct net_device *dev)
{
	if (dev->irq != -1)
	{
		struct parport *port =
		   ((struct net_local *)netdev_priv(dev))->pardev->port;
		port->ops->disable_irq (port);
	}
}


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static inline void write_data (struct net_device *dev, unsigned char data)
{
	struct parport *port =
	   ((struct net_local *)netdev_priv(dev))->pardev->port;

	port->ops->write_data (port, data);
}


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static inline unsigned char read_status (struct net_device *dev)
{
	struct parport *port =
	   ((struct net_local *)netdev_priv(dev))->pardev->port;

	return port->ops->read_status (port);
}


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static const struct header_ops plip_header_ops = {
	.create	= plip_hard_header,
	.cache  = plip_hard_header_cache,
};


static const struct net_device_ops plip_netdev_ops = {
	.ndo_open		 = plip_open,
	.ndo_stop		 = plip_close,
	.ndo_start_xmit		 = plip_tx_packet,
	.ndo_do_ioctl		 = plip_ioctl,
	.ndo_set_mac_address	 = eth_mac_addr,
	.ndo_validate_addr	 = eth_validate_addr,
};

/* Entry point of PLIP driver.
   Probe the hardware, and register/initialize the driver.

   PLIP is rather weird, because of the way it interacts with the parport
   system.  It is _not_ initialised from Space.c.  Instead, plip_init()
   is called, and that function makes up a "struct net_device" for each port, and
   then calls us here.

   */


static void

plip_init_netdev(struct net_device *dev)
{
	struct net_local *nl = netdev_priv(dev);

	/* Then, override parts of it */
	dev->tx_queue_len 	 = 10;
	dev->flags	         = IFF_POINTOPOINT|IFF_NOARP;
	memset(dev->dev_addr, 0xfc, ETH_ALEN);

	dev->netdev_ops		 = &plip_netdev_ops;
	dev->header_ops          = &plip_header_ops;


	nl->port_owner = 0;

	/* Initialize constants */
	nl->trigger	= PLIP_TRIGGER_WAIT;
	nl->nibble	= PLIP_NIBBLE_WAIT;

	/* Initialize task queue structures */
	INIT_WORK(&nl->immediate, plip_bh);
	INIT_DELAYED_WORK(&nl->deferred, plip_kick_bh);

	if (dev->irq == -1)
		INIT_DELAYED_WORK(&nl->timer, plip_timer_bh);

	spin_lock_init(&nl->lock);
}


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Total128100.00%12100.00%



/* Bottom half handler for the delayed request.
   This routine is kicked by do_timer().
   Request `plip_bh' to be invoked. */


static void

plip_kick_bh(struct work_struct *work)
{
	struct net_local *nl =
		container_of(work, struct net_local, deferred.work);

	if (nl->is_deferred)
		schedule_work(&nl->immediate);
}


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/* Forward declarations of internal routines */
static int plip_none(struct net_device *, struct net_local *,
		     struct plip_local *, struct plip_local *);
static int plip_receive_packet(struct net_device *, struct net_local *,
			       struct plip_local *, struct plip_local *);
static int plip_send_packet(struct net_device *, struct net_local *,
			    struct plip_local *, struct plip_local *);
static int plip_connection_close(struct net_device *, struct net_local *,
				 struct plip_local *, struct plip_local *);
static int plip_error(struct net_device *, struct net_local *,
		      struct plip_local *, struct plip_local *);
static int plip_bh_timeout_error(struct net_device *dev, struct net_local *nl,
				 struct plip_local *snd,
				 struct plip_local *rcv,
				 int error);


#define OK        0

#define TIMEOUT   1

#define ERROR     2

#define HS_TIMEOUT	3


typedef int (*plip_func)(struct net_device *dev, struct net_local *nl,
			 struct plip_local *snd, struct plip_local *rcv);


static const plip_func connection_state_table[] =
{
	plip_none,
	plip_receive_packet,
	plip_send_packet,
	plip_connection_close,
	plip_error
};

/* Bottom half handler of PLIP. */


static void

plip_bh(struct work_struct *work)
{
	struct net_local *nl = container_of(work, struct net_local, immediate);
	struct plip_local *snd = &nl->snd_data;
	struct plip_local *rcv = &nl->rcv_data;
	plip_func f;
	int r;

	nl->is_deferred = 0;
	f = connection_state_table[nl->connection];
	if ((r = (*f)(nl->dev, nl, snd, rcv)) != OK &&
	    (r = plip_bh_timeout_error(nl->dev, nl, snd, rcv, r)) != OK) {
		nl->is_deferred = 1;
		schedule_delayed_work(&nl->deferred, 1);
	}
}


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Total130100.00%4100.00%





static void

plip_timer_bh(struct work_struct *work)
{
	struct net_local *nl =
		container_of(work, struct net_local, timer.work);

	if (!(atomic_read (&nl->kill_timer))) {
		plip_interrupt (nl->dev);

		schedule_delayed_work(&nl->timer, 1);
	}
	else {
		complete(&nl->killed_timer_cmp);
	}
}


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Randy Dunlap22.82%116.67%


Total71100.00%6100.00%





static int

plip_bh_timeout_error(struct net_device *dev, struct net_local *nl,
		      struct plip_local *snd, struct plip_local *rcv,
		      int error)
{
	unsigned char c0;
	/*
         * This is tricky. If we got here from the beginning of send (either
         * with ERROR or HS_TIMEOUT) we have IRQ enabled. Otherwise it's
         * already disabled. With the old variant of {enable,disable}_irq()
         * extra disable_irq() was a no-op. Now it became mortal - it's
         * unbalanced and thus we'll never re-enable IRQ (until rmmod plip,
         * that is). So we have to treat HS_TIMEOUT and ERROR from send
         * in a special way.
         */

	spin_lock_irq(&nl->lock);
	if (nl->connection == PLIP_CN_SEND) {

		if (error != ERROR) { /* Timeout */
			nl->timeout_count++;
			if ((error == HS_TIMEOUT && nl->timeout_count <= 10) ||
			    nl->timeout_count <= 3) {
				spin_unlock_irq(&nl->lock);
				/* Try again later */
				return TIMEOUT;
			}
			c0 = read_status(dev);
			printk(KERN_WARNING "%s: transmit timeout(%d,%02x)\n",
			       dev->name, snd->state, c0);
		} else
			error = HS_TIMEOUT;
		dev->stats.tx_errors++;
		dev->stats.tx_aborted_errors++;
	} else if (nl->connection == PLIP_CN_RECEIVE) {
		if (rcv->state == PLIP_PK_TRIGGER) {
			/* Transmission was interrupted. */
			spin_unlock_irq(&nl->lock);
			return OK;
		}
		if (error != ERROR) { /* Timeout */
			if (++nl->timeout_count <= 3) {
				spin_unlock_irq(&nl->lock);
				/* Try again later */
				return TIMEOUT;
			}
			c0 = read_status(dev);
			printk(KERN_WARNING "%s: receive timeout(%d,%02x)\n",
			       dev->name, rcv->state, c0);
		}
		dev->stats.rx_dropped++;
	}
	rcv->state = PLIP_PK_DONE;
	if (rcv->skb) {
		kfree_skb(rcv->skb);
		rcv->skb = NULL;
	}
	snd->state = PLIP_PK_DONE;
	if (snd->skb) {
		dev_kfree_skb(snd->skb);
		snd->skb = NULL;
	}
	spin_unlock_irq(&nl->lock);
	if (error == HS_TIMEOUT) {
		DISABLE(dev->irq);
		synchronize_irq(dev->irq);
	}
	disable_parport_interrupts (dev);
	netif_stop_queue (dev);
	nl->connection = PLIP_CN_ERROR;
	write_data (dev, 0x00);

	return TIMEOUT;
}


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static int

plip_none(struct net_device *dev, struct net_local *nl,
	  struct plip_local *snd, struct plip_local *rcv)
{
	return OK;
}


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/* PLIP_RECEIVE --- receive a byte(two nibbles)
   Returns OK on success, TIMEOUT on timeout */


static inline int

plip_receive(unsigned short nibble_timeout, struct net_device *dev,
	     enum plip_nibble_state *ns_p, unsigned char *data_p)
{
	unsigned char c0, c1;
	unsigned int cx;

	switch (*ns_p) {
	case PLIP_NB_BEGIN:
		cx = nibble_timeout;
		while (1) {
			c0 = read_status(dev);
			udelay(PLIP_DELAY_UNIT);
			if ((c0 & 0x80) == 0) {
				c1 = read_status(dev);
				if (c0 == c1)
					break;
			}
			if (--cx == 0)
				return TIMEOUT;
		}
		*data_p = (c0 >> 3) & 0x0f;
		write_data (dev, 0x10); /* send ACK */
		*ns_p = PLIP_NB_1;

	case PLIP_NB_1:
		cx = nibble_timeout;
		while (1) {
			c0 = read_status(dev);
			udelay(PLIP_DELAY_UNIT);
			if (c0 & 0x80) {
				c1 = read_status(dev);
				if (c0 == c1)
					break;
			}
			if (--cx == 0)
				return TIMEOUT;
		}
		*data_p |= (c0 << 1) & 0xf0;
		write_data (dev, 0x00); /* send ACK */
		*ns_p = PLIP_NB_BEGIN;
	case PLIP_NB_2:
		break;
	}
	return OK;
}


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/*
 *      Determine the packet's protocol ID. The rule here is that we
 *      assume 802.3 if the type field is short enough to be a length.
 *      This is normal practice and works for any 'now in use' protocol.
 *
 *      PLIP is ethernet ish but the daddr might not be valid if unicast.
 *      PLIP fortunately has no bus architecture (its Point-to-point).
 *
 *      We can't fix the daddr thing as that quirk (more bug) is embedded
 *      in far too many old systems not all even running Linux.
 */




static __be16 plip_type_trans(struct sk_buff *skb, struct net_device *dev)
{
	struct ethhdr *eth;
	unsigned char *rawp;

	skb_reset_mac_header(skb);
	skb_pull(skb,dev->hard_header_len);
	eth = eth_hdr(skb);

	if(is_multicast_ether_addr(eth->h_dest))
	{
		if(ether_addr_equal_64bits(eth->h_dest, dev->broadcast))
			skb->pkt_type=PACKET_BROADCAST;
		else
			skb->pkt_type=PACKET_MULTICAST;
	}

	/*
         *      This ALLMULTI check should be redundant by 1.4
         *      so don't forget to remove it.
         */

	if (ntohs(eth->h_proto) >= ETH_P_802_3_MIN)
		return eth->h_proto;

	rawp = skb->data;

	/*
         *      This is a magic hack to spot IPX packets. Older Novell breaks
         *      the protocol design and runs IPX over 802.3 without an 802.2 LLC
         *      layer. We look for FFFF which isn't a used 802.2 SSAP/DSAP. This
         *      won't work for fault tolerant netware but does for the rest.
         */
	if (*(unsigned short *)rawp == 0xFFFF)
		return htons(ETH_P_802_3);

	/*
         *      Real 802.2 LLC
         */
	return htons(ETH_P_802_2);
}


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/* PLIP_RECEIVE_PACKET --- receive a packet */


static int

plip_receive_packet(struct net_device *dev, struct net_local *nl,
		    struct plip_local *snd, struct plip_local *rcv)
{
	unsigned short nibble_timeout = nl->nibble;
	unsigned char *lbuf;

	switch (rcv->state) {
	case PLIP_PK_TRIGGER:
		DISABLE(dev->irq);
		/* Don't need to synchronize irq, as we can safely ignore it */
		disable_parport_interrupts (dev);
		write_data (dev, 0x01); /* send ACK */
		if (net_debug > 2)
			printk(KERN_DEBUG "%s: receive start\n", dev->name);
		rcv->state = PLIP_PK_LENGTH_LSB;
		rcv->nibble = PLIP_NB_BEGIN;

	case PLIP_PK_LENGTH_LSB:
		if (snd->state != PLIP_PK_DONE) {
			if (plip_receive(nl->trigger, dev,
					 &rcv->nibble, &rcv->length.b.lsb)) {
				/* collision, here dev->tbusy == 1 */
				rcv->state = PLIP_PK_DONE;
				nl->is_deferred = 1;
				nl->connection = PLIP_CN_SEND;
				schedule_delayed_work(&nl->deferred, 1);
				enable_parport_interrupts (dev);
				ENABLE(dev->irq);
				return OK;
			}
		} else {
			if (plip_receive(nibble_timeout, dev,
					 &rcv->nibble, &rcv->length.b.lsb))
				return TIMEOUT;
		}
		rcv->state = PLIP_PK_LENGTH_MSB;

	case PLIP_PK_LENGTH_MSB:
		if (plip_receive(nibble_timeout, dev,
				 &rcv->nibble, &rcv->length.b.msb))
			return TIMEOUT;
		if (rcv->length.h > dev->mtu + dev->hard_header_len ||
		    rcv->length.h < 8) {
			printk(KERN_WARNING "%s: bogus packet size %d.\n", dev->name, rcv->length.h);
			return ERROR;
		}
		/* Malloc up new buffer. */
		rcv->skb = dev_alloc_skb(rcv->length.h + 2);
		if (rcv->skb == NULL) {
			printk(KERN_ERR "%s: Memory squeeze.\n", dev->name);
			return ERROR;
		}
		skb_reserve(rcv->skb, 2);	/* Align IP on 16 byte boundaries */
		skb_put(rcv->skb,rcv->length.h);
		rcv->skb->dev = dev;
		rcv->state = PLIP_PK_DATA;
		rcv->byte = 0;
		rcv->checksum = 0;

	case PLIP_PK_DATA:
		lbuf = rcv->skb->data;
		do {
			if (plip_receive(nibble_timeout, dev,
					 &rcv->nibble, &lbuf[rcv->byte]))
				return TIMEOUT;
		} while (++rcv->byte < rcv->length.h);
		do {
			rcv->checksum += lbuf[--rcv->byte];
		} while (rcv->byte);
		rcv->state = PLIP_PK_CHECKSUM;

	case PLIP_PK_CHECKSUM:
		if (plip_receive(nibble_timeout, dev,
				 &rcv->nibble, &rcv->data))
			return TIMEOUT;
		if (rcv->data != rcv->checksum) {
			dev->stats.rx_crc_errors++;
			if (net_debug)
				printk(KERN_DEBUG "%s: checksum error\n", dev->name);
			return ERROR;
		}
		rcv->state = PLIP_PK_DONE;

	case PLIP_PK_DONE:
		/* Inform the upper layer for the arrival of a packet. */
		rcv->skb->protocol=plip_type_trans(rcv->skb, dev);
		netif_rx_ni(rcv->skb);
		dev->stats.rx_bytes += rcv->length.h;
		dev->stats.rx_packets++;
		rcv->skb = NULL;
		if (net_debug > 2)
			printk(KERN_DEBUG "%s: receive end\n", dev->name);

		/* Close the connection. */
		write_data (dev, 0x00);
		spin_lock_irq(&nl->lock);
		if (snd->state != PLIP_PK_DONE) {
			nl->connection = PLIP_CN_SEND;
			spin_unlock_irq(&nl->lock);
			schedule_work(&nl->immediate);
			enable_parport_interrupts (dev);
			ENABLE(dev->irq);
			return OK;
		} else {
			nl->connection = PLIP_CN_NONE;
			spin_unlock_irq(&nl->lock);
			enable_parport_interrupts (dev);
			ENABLE(dev->irq);
			return OK;
		}
	}
	return OK;
}


Contributors
PersonTokensPropCommitsCommitProp
Linus Torvalds (pre-git)67897.84%1168.75%


Jeff Garzik50.72%16.25%


Hannes Eder40.58%16.25%


Ingo Molnar30.43%16.25%


Linus Torvalds20.29%16.25%


Mikulas Patocka10.14%16.25%


Total693100.00%16100.00%



/* PLIP_SEND --- send a byte (two nibbles)
   Returns OK on success, TIMEOUT when timeout    */


static inline int

plip_send(unsigned short nibble_timeout, struct net_device *dev,
	  enum plip_nibble_state *ns_p, unsigned char data)
{
	unsigned char c0;
	unsigned int cx;

	switch (*ns_p) {
	case PLIP_NB_BEGIN:
		write_data (dev, data & 0x0f);
		*ns_p = PLIP_NB_1;

	case PLIP_NB_1:
		write_data (dev, 0x10 | (data & 0x0f));
		cx = nibble_timeout;
		while (1) {
			c0 = read_status(dev);
			if ((c0 & 0x80) == 0)
				break;
			if (--cx == 0)
				return TIMEOUT;
			udelay(PLIP_DELAY_UNIT);
		}
		write_data (dev, 0x10 | (data >> 4));
		*ns_p = PLIP_NB_2;

	case PLIP_NB_2:
		write_data (dev, (data >> 4));
		cx = nibble_timeout;
		while (1) {
			c0 = read_status(dev);
			if (c0 & 0x80)
				break;
			if (--cx == 0)
				return TIMEOUT;
			udelay(PLIP_DELAY_UNIT);
		}
		*ns_p = PLIP_NB_BEGIN;
		return OK;
	}
	return OK;
}


Contributors
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Linus Torvalds (pre-git)19799.49%266.67%


Jesper Juhl10.51%133.33%


Total198100.00%3100.00%



/* PLIP_SEND_PACKET --- send a packet */


static int

plip_send_packet(struct net_device *dev, struct net_local *nl,
		 struct plip_local *snd, struct plip_local *rcv)
{
	unsigned short nibble_timeout = nl->nibble;
	unsigned char *lbuf;
	unsigned char c0;
	unsigned int cx;

	if (snd->skb == NULL || (lbuf = snd->skb->data) == NULL) {
		printk(KERN_DEBUG "%s: send skb lost\n", dev->name);
		snd->state = PLIP_PK_DONE;
		snd->skb = NULL;
		return ERROR;
	}

	switch (snd->state) {
	case PLIP_PK_TRIGGER:
		if ((read_status(dev) & 0xf8) != 0x80)
			return HS_TIMEOUT;

		/* Trigger remote rx interrupt. */
		write_data (dev, 0x08);
		cx = nl->trigger;
		while (1) {
			udelay(PLIP_DELAY_UNIT);
			spin_lock_irq(&nl->lock);
			if (nl->connection == PLIP_CN_RECEIVE) {
				spin_unlock_irq(&nl->lock);
				/* Interrupted. */
				dev->stats.collisions++;
				return OK;
			}
			c0 = read_status(dev);
			if (c0 & 0x08) {
				spin_unlock_irq(&nl->lock);
				DISABLE(dev->irq);
				synchronize_irq(dev->irq);
				if (nl->connection == PLIP_CN_RECEIVE) {
					/* Interrupted.
                                           We don't need to enable irq,
                                           as it is soon disabled.    */
					/* Yes, we do. New variant of
                                           {enable,disable}_irq *counts*
                                           them.  -- AV  */
					ENABLE(dev->irq);
					dev->stats.collisions++;
					return OK;
				}
				disable_parport_interrupts (dev);
				if (net_debug > 2)
					printk(KERN_DEBUG "%s: send start\n", dev->name);
				snd->state = PLIP_PK_LENGTH_LSB;
				snd->nibble = PLIP_NB_BEGIN;
				nl->timeout_count = 0;
				break;
			}
			spin_unlock_irq(&nl->lock);
			if (--cx == 0) {
				write_data (dev, 0x00);
				return HS_TIMEOUT;
			}
		}

	case PLIP_PK_LENGTH_LSB:
		if (plip_send(nibble_timeout, dev,
			      &snd->nibble, snd->length.b.lsb))
			return TIMEOUT;
		snd->state = PLIP_PK_LENGTH_MSB;

	case PLIP_PK_LENGTH_MSB:
		if (plip_send(nibble_timeout, dev,
			      &snd->nibble, snd->length.b.msb))
			return TIMEOUT;
		snd->state = PLIP_PK_DATA;
		snd->byte = 0;
		snd->checksum = 0;

	case PLIP_PK_DATA:
		do {
			if (plip_send(nibble_timeout, dev,
				      &snd->nibble, lbuf[snd->byte]))
				return TIMEOUT;
		} while (++snd->byte < snd->length.h);
		do {
			snd->checksum += lbuf[--snd->byte];
		} while (snd->byte);
		snd->state = PLIP_PK_CHECKSUM;

	case PLIP_PK_CHECKSUM:
		if (plip_send(nibble_timeout, dev,
			      &snd->nibble, snd->checksum))
			return TIMEOUT;

		dev->stats.tx_bytes += snd->skb->len;
		dev_kfree_skb(snd->skb);
		dev->stats.tx_packets++;
		snd->state = PLIP_PK_DONE;

	case PLIP_PK_DONE:
		/* Close the connection */
		write_data (dev, 0x00);
		snd->skb = NULL;
		if (net_debug > 2)
			printk(KERN_DEBUG "%s: send end\n", dev->name);
		nl->connection = PLIP_CN_CLOSING;
		nl->is_deferred = 1;
		schedule_delayed_work(&nl->deferred, 1);
		enable_parport_interrupts (dev);
		ENABLE(dev->irq);
		return OK;
	}
	return OK;
}


Contributors
PersonTokensPropCommitsCommitProp
Linus Torvalds (pre-git)57896.82%969.23%


Jeff Garzik81.34%17.69%


Linus Torvalds50.84%17.69%


Hannes Eder40.67%17.69%


Ingo Molnar20.34%17.69%


Total597100.00%13100.00%





static int

plip_connection_close(struct net_device *dev, struct net_local *nl,
		      struct plip_local *snd, struct plip_local *rcv)
{
	spin_lock_irq(&nl->lock);
	if (nl->connection == PLIP_CN_CLOSING) {
		nl->connection = PLIP_CN_NONE;
		netif_wake_queue (dev);
	}
	spin_unlock_irq(&nl->lock);
	if (nl->should_relinquish) {
		nl->should_relinquish = nl->port_owner = 0;
		parport_release(nl->pardev);
	}
	return OK;
}


Contributors
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Linus Torvalds (pre-git)91100.00%4100.00%


Total91100.00%4100.00%



/* PLIP_ERROR --- wait till other end settled */


static int

plip_error(struct net_device *dev, struct net_local *nl,
	   struct plip_local *snd, struct plip_local *rcv)
{
	unsigned char status;

	status = read_status(dev);
	if ((status & 0xf8) == 0x80) {
		if (net_debug > 2)
			printk(KERN_DEBUG "%s: reset interface.\n", dev->name);
		nl->connection = PLIP_CN_NONE;
		nl->should_relinquish = 0;
		netif_start_queue (dev);
		enable_parport_interrupts (dev);
		ENABLE(dev->irq);
		netif_wake_queue (dev);
	} else {
		nl->is_deferred = 1;
		schedule_delayed_work(&nl->deferred, 1);
	}

	return OK;
}


Contributors
PersonTokensPropCommitsCommitProp
Linus Torvalds (pre-git)11998.35%685.71%


Ingo Molnar21.65%114.29%


Total121100.00%7100.00%



/* Handle the parallel port interrupts. */


static void

plip_interrupt(void *dev_id)
{
	struct net_device *dev = dev_id;
	struct net_local *nl;
	struct plip_local *rcv;
	unsigned char c0;
	unsigned long flags;

	nl = netdev_priv(dev);
	rcv = &nl->rcv_data;

	spin_lock_irqsave (&nl->lock, flags);

	c0 = read_status(dev);
	if ((c0 & 0xf8) != 0xc0) {
		if ((dev->irq != -1) && (net_debug > 1))
			printk(KERN_DEBUG "%s: spurious interrupt\n", dev->name);
		spin_unlock_irqrestore (&nl->lock, flags);
		return;
	}

	if (net_debug > 3)
		printk(KERN_DEBUG "%s: interrupt.\n", dev->name);

	switch (nl->connection) {
	case PLIP_CN_CLOSING:
		netif_wake_queue (dev);
	case PLIP_CN_NONE:
	case PLIP_CN_SEND:
		rcv->state = PLIP_PK_TRIGGER;
		nl->connection = PLIP_CN_RECEIVE;
		nl->timeout_count = 0;
		schedule_work(&nl->immediate);
		break;

	case PLIP_CN_RECEIVE:
		/* May occur because there is race condition
                   around test and set of dev->interrupt.
                   Ignore this interrupt. */
		break;

	case PLIP_CN_ERROR:
		printk(KERN_ERR "%s: receive interrupt in error state\n", dev->name);
		break;
	}

	spin_unlock_irqrestore(&nl->lock, flags);
}


Contributors
PersonTokensPropCommitsCommitProp
Linus Torvalds (pre-git)19391.90%872.73%


Mikulas Patocka136.19%19.09%


Randy Dunlap31.43%19.09%


Ingo Molnar10.48%19.09%


Total210100.00%11100.00%





static int

plip_tx_packet(struct sk_buff *skb, struct net_device *dev)
{
	struct net_local *nl = netdev_priv(dev);
	struct plip_local *snd = &nl->snd_data;

	if (netif_queue_stopped(dev))
		return NETDEV_TX_BUSY;

	/* We may need to grab the bus */
	if (!nl->port_owner) {
		if (parport_claim(nl->pardev))
			return NETDEV_TX_BUSY;
		nl->port_owner = 1;
	}

	netif_stop_queue (dev);

	if (skb->len > dev->mtu + dev->hard_header_len) {
		printk(KERN_WARNING "%s: packet too big, %d.\n", dev->name, (int)skb->len);
		netif_start_queue (dev);
		return NETDEV_TX_BUSY;
	}

	if (net_debug > 2)
		printk(KERN_DEBUG "%s: send request\n", dev->name);

	spin_lock_irq(&nl->lock);
	snd->skb = skb;
	snd->length.h = skb->len;
	snd->state = PLIP_PK_TRIGGER;
	if (nl->connection == PLIP_CN_NONE) {
		nl->connection = PLIP_CN_SEND;
		nl->timeout_count = 0;
	}
	schedule_work(&nl->immediate);
	spin_unlock_irq(&nl->lock);

	return NETDEV_TX_OK;
}


Contributors
PersonTokensPropCommitsCommitProp
Linus Torvalds (pre-git)19996.14%763.64%


Patrick McHardy41.93%218.18%


Randy Dunlap31.45%19.09%


Ingo Molnar10.48%19.09%


Total207100.00%11100.00%





static void

plip_rewrite_address(const struct net_device *dev, struct ethhdr *eth)
{
	const struct in_device *in_dev;

	rcu_read_lock();
	in_dev = __in_dev_get_rcu(dev);
	if (in_dev) {
		/* Any address will do - we take the first */
		const struct in_ifaddr *ifa = in_dev->ifa_list;
		if (ifa) {
			memcpy(eth->h_source, dev->dev_addr, ETH_ALEN);
			memset(eth->h_dest, 0xfc, 2);
			memcpy(eth->h_dest+2, &ifa->ifa_address, 4);
		}
	}
	rcu_read_unlock();
}


Contributors
PersonTokensPropCommitsCommitProp
Linus Torvalds (pre-git)8282.83%125.00%


Eric Dumazet1313.13%125.00%


Stephen Hemminger33.03%125.00%


Joe Perches11.01%125.00%


Total99100.00%4100.00%





static int

plip_hard_header(struct sk_buff *skb, struct net_device *dev,
		 unsigned short type, const void *daddr,
		 const void *saddr, unsigned len)
{
	int ret;

	ret = eth_header(skb, dev, type, daddr, saddr, len);
	if (ret >= 0)
		plip_rewrite_address (dev, (struct ethhdr *)skb->data);

	return ret;
}


Contributors
PersonTokensPropCommitsCommitProp
Linus Torvalds (pre-git)6990.79%266.67%


Stephen Hemminger79.21%133.33%


Total76100.00%3100.00%






static int plip_hard_header_cache(const struct neighbour *neigh,
				  struct hh_cache *hh, __be16 type)
{
	int ret;

	ret = eth_header_cache(neigh, hh, type);
	if (ret == 0) {
		struct ethhdr *eth;

		eth = (struct ethhdr*)(((u8*)hh->hh_data) +
				       HH_DATA_OFF(sizeof(*eth)));
		plip_rewrite_address (neigh->dev, eth);
	}

	return ret;
}


Contributors
PersonTokensPropCommitsCommitProp
Linus Torvalds (pre-git)6372.41%342.86%


David S. Miller1719.54%228.57%


Stephen Hemminger66.90%114.29%


Hannes Eder11.15%114.29%


Total87100.00%7100.00%



/* Open/initialize the board.  This is called (in the current kernel)
   sometime after booting when the 'ifconfig' program is run.

   This routine gets exclusive access to the parallel port by allocating
   its IRQ line.
 */


static int

plip_open(struct net_device *dev)
{
	struct net_local *nl = netdev_priv(dev);
	struct in_device *in_dev;

	/* Grab the port */
	if (!nl->port_owner) {
		if (parport_claim(nl->pardev)) return -EAGAIN;
		nl->port_owner = 1;
	}

	nl->should_relinquish = 0;

	/* Clear the data port. */
	write_data (dev, 0x00);

	/* Enable rx interrupt. */
	enable_parport_interrupts (dev);
	if (dev->irq == -1)
	{
		atomic_set (&nl->kill_timer, 0);
		schedule_delayed_work(&nl->timer, 1);
	}

	/* Initialize the state machine. */
	nl->rcv_data.state = nl->snd_data.state = PLIP_PK_DONE;
	nl->rcv_data.skb = nl->snd_data.skb = NULL;
	nl->connection = PLIP_CN_NONE;
	nl->is_deferred = 0;

	/* Fill in the MAC-level header.
           We used to abuse dev->broadcast to store the point-to-point
           MAC address, but we no longer do it. Instead, we fetch the
           interface address whenever it is needed, which is cheap enough
           because we use the hh_cache. Actually, abusing dev->broadcast
           didn't work, because when using plip_open the point-to-point
           address isn't yet known.
           PLIP doesn't have a real MAC address, but we need it to be
           DOS compatible, and to properly support taps (otherwise,
           when the device address isn't identical to the address of a
           received frame, the kernel incorrectly drops it).             */

	in_dev=__in_dev_get_rtnl(dev);
	if (in_dev) {
		/* Any address will do - we take the first. We already
                   have the first two bytes filled with 0xfc, from
                   plip_init_dev(). */
		struct in_ifaddr *ifa=in_dev->ifa_list;
		if (ifa != NULL) {
			memcpy(dev->dev_addr+2, &ifa->ifa_local, 4);
		}
	}

	netif_start_queue (dev);

	return 0;
}


Contributors
PersonTokensPropCommitsCommitProp
Linus Torvalds (pre-git)19194.09%770.00%


Eric Dumazet73.45%110.00%


Randy Dunlap31.48%110.00%


Ingo Molnar20.99%110.00%


Total203100.00%10100.00%



/* The inverse routine to plip_open (). */


static int

plip_close(struct net_device *dev)
{
	struct net_local *nl = netdev_priv(dev);
	struct plip_local *snd = &nl->snd_data;
	struct plip_local *rcv = &nl->rcv_data;

	netif_stop_queue (dev);
	DISABLE(dev->irq);
	synchronize_irq(dev->irq);

	if (dev->irq == -1)
	{
		init_completion(&nl->killed_timer_cmp);
		atomic_set (&nl->kill_timer, 1);
		wait_for_completion(&nl->killed_timer_cmp);
	}

#ifdef NOTDEF
	outb(0x00, PAR_DATA(dev));
#endif
	nl->is_deferred = 0;
	nl->connection = PLIP_CN_NONE;
	if (nl->port_owner) {
		parport_release(nl->pardev);
		nl->port_owner = 0;
	}

	snd->state = PLIP_PK_DONE;
	if (snd->skb) {
		dev_kfree_skb(snd->skb);
		snd->skb = NULL;
	}
	rcv->state = PLIP_PK_DONE;
	if (rcv->skb) {
		kfree_skb(rcv->skb);
		rcv->skb = NULL;
	}

#ifdef NOTDEF
	/* Reset. */
	outb(0x00, PAR_CONTROL(dev));
#endif
	return 0;
}


Contributors
PersonTokensPropCommitsCommitProp
Linus Torvalds (pre-git)20694.50%872.73%


Linus Torvalds52.29%19.09%


Matthias Kaehlcke41.83%19.09%


Randy Dunlap31.38%19.09%


Total218100.00%11100.00%





static int

plip_preempt(void *handle)
{
	struct net_device *dev = (struct net_device *)handle;
	struct net_local *nl = netdev_priv(dev);

	/* Stand our ground if a datagram is on the wire */
	if (nl->connection != PLIP_CN_NONE) {
		nl->should_relinquish = 1;
		return 1;
	}

	nl->port_owner = 0;	/* Remember that we released the bus */
	return 0;
}


Contributors
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Linus Torvalds (pre-git)5995.16%375.00%


Randy Dunlap34.84%125.00%


Total62100.00%4100.00%





static void

plip_wakeup(void *handle)
{
	struct net_device *dev = (struct net_device *)handle;
	struct net_local *nl = netdev_priv(dev);

	if (nl->port_owner) {
		/* Why are we being woken up? */
		printk(KERN_DEBUG "%s: why am I being woken up?\n", dev->name);
		if (!parport_claim(nl->pardev))
			/* bus_owner is already set (but why?) */
			printk(KERN_DEBUG "%s: I'm broken.\n", dev->name);
		else
			return;
	}

	if (!(dev->flags & IFF_UP))
		/* Don't need the port when the interface is down */
		return;

	if (!parport_claim(nl->pardev)) {
		nl->port_owner = 1;
		/* Clear the data port. */
		write_data (dev, 0x00);
	}
}


Contributors
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Linus Torvalds (pre-git)11097.35%480.00%


Randy Dunlap32.65%120.00%


Total113100.00%5100.00%





static int

plip_ioctl(struct net_device *dev, struct ifreq *rq, int cmd)
{
	struct net_local *nl = netdev_priv(dev);
	struct plipconf *pc = (struct plipconf *) &rq->ifr_ifru;

	if (cmd != SIOCDEVPLIP)
		return -EOPNOTSUPP;

	switch(pc->pcmd) {
	case PLIP_GET_TIMEOUT:
		pc->trigger = nl->trigger;
		pc->nibble  = nl->nibble;
		break;
	case PLIP_SET_TIMEOUT:
		if(!capable(CAP_NET_ADMIN))
			return -EPERM;
		nl->trigger = pc->trigger;
		nl->nibble  = pc->nibble;
		break;
	default:
		return -EOPNOTSUPP;
	}
	return 0;
}


Contributors
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Linus Torvalds (pre-git)10888.52%350.00%


Herbert Xu108.20%116.67%


Randy Dunlap32.46%116.67%


Al Viro10.82%116.67%


Total122100.00%6100.00%




static int parport[PLIP_MAX] = { [0 ... PLIP_MAX-1] = -1 };

static int timid;

module_param_array(parport, int, NULL, 0);
module_param(timid, int, 0);
MODULE_PARM_DESC(parport, "List of parport device numbers to use by plip");


static struct net_device *dev_plip[PLIP_MAX] = { NULL, };



static inline int

plip_searchfor(int list[], int a)
{
	int i;
	for (i = 0; i < PLIP_MAX && list[i] != -1; i++) {
		if (list[i] == a) return 1;
	}
	return 0;
}


Contributors
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Linus Torvalds (pre-git)5498.18%375.00%


Dave Jones11.82%125.00%


Total55100.00%4100.00%



/* plip_attach() is called (by the parport code) when a port is
 * available to use. */



static void plip_attach (struct parport *port)
{
	static int unit;
	struct net_device *dev;
	struct net_local *nl;
	char name[IFNAMSIZ];
	struct pardev_cb plip_cb;

	if ((parport[0] == -1 && (!timid || !port->devices)) ||
	    plip_searchfor(parport, port->number)) {
		if (unit == PLIP_MAX) {
			printk(KERN_ERR "plip: too many devices\n");
			return;
		}

		sprintf(name, "plip%d", unit);
		dev = alloc_etherdev(sizeof(struct net_local));
		if (!dev)
			return;

		strcpy(dev->name, name);

		dev->irq = port->irq;
		dev->base_addr = port->base;
		if (port->irq == -1) {
			printk(KERN_INFO "plip: %s has no IRQ. Using IRQ-less mode,"
		                 "which is fairly inefficient!\n", port->name);
		}

		nl = netdev_priv(dev);
		nl->dev = dev;

		memset(&plip_cb, 0, sizeof(plip_cb));
		plip_cb.private = dev;
		plip_cb.preempt = plip_preempt;
		plip_cb.wakeup = plip_wakeup;
		plip_cb.irq_func = plip_interrupt;

		nl->pardev = parport_register_dev_model(port, dev->name,
							&plip_cb, unit);

		if (!nl->pardev) {
			printk(KERN_ERR "%s: parport_register failed\n", name);
			goto err_free_dev;
		}

		plip_init_netdev(dev);

		if (register_netdev(dev)) {
			printk(KERN_ERR "%s: network register failed\n", name);
			goto err_parport_unregister;
		}

		printk(KERN_INFO "%s", version);
		if (dev->irq != -1)
			printk(KERN_INFO "%s: Parallel port at %#3lx, "
					 "using IRQ %d.\n",
				         dev->name, dev->base_addr, dev->irq);
		else
			printk(KERN_INFO "%s: Parallel port at %#3lx, "
					 "not using IRQ.\n",
					 dev->name, dev->base_addr);
		dev_plip[unit++] = dev;
	}
	return;

err_parport_unregister:
	parport_unregister_device(nl->pardev);
err_free_dev:
	free_netdev(dev);
}


Contributors
PersonTokensPropCommitsCommitProp
Stephen Hemminger10229.48%110.00%


Linus Torvalds (pre-git)9828.32%220.00%


Al Viro6719.36%220.00%


Sudip Mukherjee4513.01%110.00%


François Romieu236.65%110.00%


David Howells61.73%110.00%


Randy Dunlap30.87%110.00%


Mikulas Patocka20.58%110.00%


Total346100.00%10100.00%



/* plip_detach() is called (by the parport code) when a port is
 * no longer available to use. */



static void plip_detach (struct parport *port)
{
	/* Nothing to do */
}


Contributors
PersonTokensPropCommitsCommitProp
Linus Torvalds (pre-git)12100.00%1100.00%


Total12100.00%1100.00%






static int plip_probe(struct pardevice *par_dev)
{
	struct device_driver *drv = par_dev->dev.driver;
	int len = strlen(drv->name);

	if (strncmp(par_dev->name, drv->name, len))
		return -ENODEV;

	return 0;
}


Contributors
PersonTokensPropCommitsCommitProp
Sudip Mukherjee54100.00%1100.00%


Total54100.00%1100.00%




static struct parport_driver plip_driver = {
	.name		= "plip",
	.probe		= plip_probe,
	.match_port	= plip_attach,
	.detach		= plip_detach,
	.devmodel	= true,
};




static void __exit plip_cleanup_module (void)
{
	struct net_device *dev;
	int i;

	for (i=0; i < PLIP_MAX; i++) {
		if ((dev = dev_plip[i])) {
			struct net_local *nl = netdev_priv(dev);
			unregister_netdev(dev);
			if (nl->port_owner)
				parport_release(nl->pardev);
			parport_unregister_device(nl->pardev);
			free_netdev(dev);
			dev_plip[i] = NULL;
		}
	}

	parport_unregister_driver(&plip_driver);
}


Contributors
PersonTokensPropCommitsCommitProp
Linus Torvalds (pre-git)7677.55%342.86%


Stephen Hemminger1313.27%228.57%


Sudip Mukherjee66.12%114.29%


Randy Dunlap33.06%114.29%


Total98100.00%7100.00%



#ifndef MODULE


static int parport_ptr;




static int __init plip_setup(char *str)
{
	int ints[4];

	str = get_options(str, ARRAY_SIZE(ints), ints);

	/* Ugh. */
	if (!strncmp(str, "parport", 7)) {
		int n = simple_strtoul(str+7, NULL, 10);
		if (parport_ptr < PLIP_MAX)
			parport[parport_ptr++] = n;
		else
			printk(KERN_INFO "plip: too many ports, %s ignored.\n",
			       str);
	} else if (!strcmp(str, "timid")) {
		timid = 1;
	} else {
		if (ints[0] == 0 || ints[1] == 0) {
			/* disable driver on "plip=" or "plip=0" */
			parport[0] = -2;
		} else {
			printk(KERN_WARNING "warning: 'plip=0x%x' ignored\n",
			       ints[1]);
		}
	}
	return 1;
}


Contributors
PersonTokensPropCommitsCommitProp
Linus Torvalds (pre-git)147100.00%5100.00%


Total147100.00%5100.00%



__setup("plip=", plip_setup);

#endif /* !MODULE */




static int __init plip_init (void)
{
	if (parport[0] == -2)
		return 0;

	if (parport[0] != -1 && timid) {
		printk(KERN_WARNING "plip: warning, ignoring `timid' since specific ports given.\n");
		timid = 0;
	}

	if (parport_register_driver (&plip_driver)) {
		printk (KERN_WARNING "plip: couldn't register driver\n");
		return 1;
	}

	return 0;
}


Contributors
PersonTokensPropCommitsCommitProp
Linus Torvalds (pre-git)68100.00%4100.00%


Total68100.00%4100.00%




module_init(plip_init);

module_exit(plip_cleanup_module);
MODULE_LICENSE("GPL");

Overall Contributors
PersonTokensPropCommitsCommitProp
Linus Torvalds (pre-git)533187.91%3542.17%


Stephen Hemminger1943.20%44.82%


Sudip Mukherjee1171.93%11.20%


Al Viro691.14%33.61%


David Howells580.96%11.20%


Randy Dunlap360.59%11.20%


Linus Torvalds310.51%67.23%


Ingo Molnar240.40%11.20%


François Romieu230.38%11.20%


Jeff Garzik210.35%22.41%


Eric Dumazet200.33%11.20%


David S. Miller200.33%22.41%


Mikulas Patocka160.26%33.61%


Wang Chen120.20%11.20%


Arnaldo Carvalho de Melo110.18%33.61%


Matthias Kaehlcke110.18%11.20%


Ben Hutchings100.16%11.20%


Andrew Morton100.16%11.20%


Herbert Xu100.16%11.20%


Hannes Eder90.15%22.41%


Rusty Russell60.10%11.20%


Jesper Juhl60.10%11.20%


Ding Tianhong40.07%11.20%


Patrick McHardy40.07%22.41%


Tejun Heo30.05%11.20%


Adrian Bunk20.03%11.20%


Arjan van de Ven20.03%11.20%


Simon Horman10.02%11.20%


Joe Perches10.02%11.20%


Dave Jones10.02%11.20%


Alexey Dobriyan10.02%11.20%


Total6064100.00%83100.00%


Directory: drivers/net/plip



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