/******************************************************************************/
/*                                                                            */
/* bypass library, Copyright (c) 2004-2007 Silicom, Ltd                       */
/*                                                                            */
/* 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, located in the file LICENSE.                 */
/*                                                                            */
/*                                                                            */
/* bypass.c                                                                    */
/*                                                                            */
/******************************************************************************/

#include <linux/version.h>
#if defined(CONFIG_SMP) && ! defined(__SMP__)
#define __SMP__
#endif

#include <linux/module.h>
#include <linux/kernel.h>
#include <asm/unistd.h>

#include <linux/sched.h>
#include <linux/wait.h>

#include <linux/netdevice.h>	// struct device, and other headers
#include <linux/kernel_stat.h>
#include <linux/pci.h>
#include <linux/rtnetlink.h>
#include <linux/ethtool.h>

#include <net/net_namespace.h>

#include "bplibk.h"

#define MOD_NAME "bypass"

#define VERSION "\n"MOD_NAME" version 9.0.4\n"

MODULE_AUTHOR("www.silicom.co.il");

MODULE_LICENSE("GPL");

int init_lib_module(void);
void cleanup_lib_module(void);

static int do_cmd(struct net_device *dev, struct ifreq *ifr, int cmd, int *data)
{
	int ret = -1;
	struct if_bypass *bypass_cb;
	static int (*ioctl) (struct net_device *, struct ifreq *, int);

	bypass_cb = (struct if_bypass *)ifr;
	bypass_cb->cmd = cmd;
	bypass_cb->data = *data;
	if ((dev->netdev_ops) && (ioctl = dev->netdev_ops->ndo_do_ioctl)) {
		ret = ioctl(dev, ifr, SIOCGIFBYPASS);
		*data = bypass_cb->data;
	}

	return ret;
}

static int doit(int cmd, int if_index, int *data)
{
	struct ifreq ifr;
	int ret = -1;
	struct net_device *dev;
	struct net_device *n;
	for_each_netdev_safe(&init_net, dev, n) {

		if (dev->ifindex == if_index) {
			ret = do_cmd(dev, &ifr, cmd, data);
			if (ret < 0)
				ret = -1;

		}
	}

	return ret;
}

#define bp_symbol_get(fn_name) symbol_get(fn_name)
#define bp_symbol_put(fn_name) symbol_put(fn_name)

#define SET_BPLIB_INT_FN(fn_name, arg_type, arg, ret) \
    ({ int (* fn_ex)(arg_type)=NULL; \
    fn_ex=bp_symbol_get(fn_name##_sd); \
       if(fn_ex) {  \
        ret= fn_ex(arg); \
       bp_symbol_put(fn_name##_sd); \
       } else ret=-1; \
    })

#define  SET_BPLIB_INT_FN2(fn_name, arg_type, arg, arg_type1, arg1, ret) \
    ({ int (* fn_ex)(arg_type,arg_type1)=NULL; \
        fn_ex=bp_symbol_get(fn_name##_sd); \
       if(fn_ex) {  \
        ret= fn_ex(arg,arg1); \
        bp_symbol_put(fn_name##_sd); \
       } else ret=-1; \
    })
#define SET_BPLIB_INT_FN3(fn_name, arg_type, arg, arg_type1, arg1,arg_type2, arg2, ret) \
    ({ int (* fn_ex)(arg_type,arg_type1, arg_type2)=NULL; \
        fn_ex=bp_symbol_get(fn_name##_sd); \
       if(fn_ex) {  \
        ret= fn_ex(arg,arg1,arg2); \
        bp_symbol_put(fn_name##_sd); \
       } else ret=-1; \
    })

#define DO_BPLIB_GET_ARG_FN(fn_name,ioctl_val, if_index) \
    ({    int data, ret=0; \
            if(is_dev_sd(if_index)){ \
            SET_BPLIB_INT_FN(fn_name, int, if_index, ret); \
            return ret; \
            }  \
            return doit(ioctl_val,if_index, &data); \
    })

#define DO_BPLIB_SET_ARG_FN(fn_name,ioctl_val,if_index,arg) \
    ({    int data, ret=0; \
            if(is_dev_sd(if_index)){ \
            SET_BPLIB_INT_FN2(fn_name, int, if_index, int, arg, ret); \
            return ret; \
            }  \
	    data=arg; \
            return doit(ioctl_val,if_index, &data); \
    })

static int is_dev_sd(int if_index)
{
	int ret = 0;
	SET_BPLIB_INT_FN(is_bypass, int, if_index, ret);
	return (ret >= 0 ? 1 : 0);
}

int is_bypass_dev(int if_index)
{
	struct pci_dev *pdev = NULL;
	struct net_device *dev = NULL;
	struct ifreq ifr;
	int ret = 0, data = 0;

	while ((pdev = pci_get_class(PCI_CLASS_NETWORK_ETHERNET << 8, pdev))) {
		if ((dev = pci_get_drvdata(pdev)) != NULL)
			if (((dev = pci_get_drvdata(pdev)) != NULL) &&
			    (dev->ifindex == if_index)) {
				if ((pdev->vendor == SILICOM_VID) &&
				    (pdev->device >= SILICOM_BP_PID_MIN) &&
				    (pdev->device <= SILICOM_BP_PID_MAX))
					goto send_cmd;
#if defined(BP_VENDOR_SUPPORT) && defined(ETHTOOL_GDRVINFO)
				else {
					struct ethtool_drvinfo info;
					const struct ethtool_ops *ops =
					    dev->ethtool_ops;
					int k = 0;

					if (ops->get_drvinfo) {
						memset(&info, 0, sizeof(info));
						info.cmd = ETHTOOL_GDRVINFO;
						ops->get_drvinfo(dev, &info);
						for (; bp_desc_array[k]; k++)
							if (!
							    (strcmp
							     (bp_desc_array[k],
							      info.driver)))
								goto send_cmd;

					}

				}
#endif
				return -1;
			}
	}
 send_cmd:
	ret = do_cmd(dev, &ifr, IS_BYPASS, &data);
	return (ret < 0 ? -1 : ret);
}

int is_bypass(int if_index)
{
	int ret = 0;
	SET_BPLIB_INT_FN(is_bypass, int, if_index, ret);

	if (ret < 0)
		return is_bypass_dev(if_index);
	return ret;
}

int get_bypass_slave(int if_index)
{
	DO_BPLIB_GET_ARG_FN(get_bypass_slave, GET_BYPASS_SLAVE, if_index);
}

int get_bypass_caps(int if_index)
{
	DO_BPLIB_GET_ARG_FN(get_bypass_caps, GET_BYPASS_CAPS, if_index);
}

int get_wd_set_caps(int if_index)
{
	DO_BPLIB_GET_ARG_FN(get_wd_set_caps, GET_WD_SET_CAPS, if_index);
}

int set_bypass(int if_index, int bypass_mode)
{
	DO_BPLIB_SET_ARG_FN(set_bypass, SET_BYPASS, if_index, bypass_mode);
}

int get_bypass(int if_index)
{
	DO_BPLIB_GET_ARG_FN(get_bypass, GET_BYPASS, if_index);
}

int get_bypass_change(int if_index)
{
	DO_BPLIB_GET_ARG_FN(get_bypass_change, GET_BYPASS_CHANGE, if_index);
}

int set_dis_bypass(int if_index, int dis_bypass)
{
	DO_BPLIB_SET_ARG_FN(set_dis_bypass, SET_DIS_BYPASS, if_index,
			    dis_bypass);
}

int get_dis_bypass(int if_index)
{
	DO_BPLIB_GET_ARG_FN(get_dis_bypass, GET_DIS_BYPASS, if_index);
}

int set_bypass_pwoff(int if_index, int bypass_mode)
{
	DO_BPLIB_SET_ARG_FN(set_bypass_pwoff, SET_BYPASS_PWOFF, if_index,
			    bypass_mode);
}

int get_bypass_pwoff(int if_index)
{
	DO_BPLIB_GET_ARG_FN(get_bypass_pwoff, GET_BYPASS_PWOFF, if_index);
}

int set_bypass_pwup(int if_index, int bypass_mode)
{
	DO_BPLIB_SET_ARG_FN(set_bypass_pwup, SET_BYPASS_PWUP, if_index,
			    bypass_mode);
}

int get_bypass_pwup(int if_index)
{
	DO_BPLIB_GET_ARG_FN(get_bypass_pwup, GET_BYPASS_PWUP, if_index);
}

int set_bypass_wd(int if_index, int ms_timeout, int *ms_timeout_set)
{
	int data = ms_timeout, ret = 0;
	if (is_dev_sd(if_index))
		SET_BPLIB_INT_FN3(set_bypass_wd, int, if_index, int, ms_timeout,
				  int *, ms_timeout_set, ret);
	else {
		ret = doit(SET_BYPASS_WD, if_index, &data);
		if (ret > 0) {
			*ms_timeout_set = ret;
			ret = 0;
		}
	}
	return ret;
}

int get_bypass_wd(int if_index, int *ms_timeout_set)
{
	int *data = ms_timeout_set, ret = 0;
	if (is_dev_sd(if_index))
		SET_BPLIB_INT_FN2(get_bypass_wd, int, if_index, int *,
				  ms_timeout_set, ret);
	else
		ret = doit(GET_BYPASS_WD, if_index, data);
	return ret;
}

int get_wd_expire_time(int if_index, int *ms_time_left)
{
	int *data = ms_time_left, ret = 0;
	if (is_dev_sd(if_index))
		SET_BPLIB_INT_FN2(get_wd_expire_time, int, if_index, int *,
				  ms_time_left, ret);
	else {
		ret = doit(GET_WD_EXPIRE_TIME, if_index, data);
		if ((ret == 0) && (*data != 0))
			ret = 1;
	}
	return ret;
}

int reset_bypass_wd_timer(int if_index)
{
	DO_BPLIB_GET_ARG_FN(reset_bypass_wd_timer, RESET_BYPASS_WD_TIMER,
			    if_index);
}

int set_std_nic(int if_index, int bypass_mode)
{
	DO_BPLIB_SET_ARG_FN(set_std_nic, SET_STD_NIC, if_index, bypass_mode);
}

int get_std_nic(int if_index)
{
	DO_BPLIB_GET_ARG_FN(get_std_nic, GET_STD_NIC, if_index);
}

int set_tx(int if_index, int tx_state)
{
	DO_BPLIB_SET_ARG_FN(set_tx, SET_TX, if_index, tx_state);
}

int get_tx(int if_index)
{
	DO_BPLIB_GET_ARG_FN(get_tx, GET_TX, if_index);
}

int set_tap(int if_index, int tap_mode)
{
	DO_BPLIB_SET_ARG_FN(set_tap, SET_TAP, if_index, tap_mode);
}

int get_tap(int if_index)
{
	DO_BPLIB_GET_ARG_FN(get_tap, GET_TAP, if_index);
}

int get_tap_change(int if_index)
{
	DO_BPLIB_GET_ARG_FN(get_tap_change, GET_TAP_CHANGE, if_index);
}

int set_dis_tap(int if_index, int dis_tap)
{
	DO_BPLIB_SET_ARG_FN(set_dis_tap, SET_DIS_TAP, if_index, dis_tap);
}

int get_dis_tap(int if_index)
{
	DO_BPLIB_GET_ARG_FN(get_dis_tap, GET_DIS_TAP, if_index);
}

int set_tap_pwup(int if_index, int tap_mode)
{
	DO_BPLIB_SET_ARG_FN(set_tap_pwup, SET_TAP_PWUP, if_index, tap_mode);
}

int get_tap_pwup(int if_index)
{
	DO_BPLIB_GET_ARG_FN(get_tap_pwup, GET_TAP_PWUP, if_index);
}

int set_bp_disc(int if_index, int disc_mode)
{
	DO_BPLIB_SET_ARG_FN(set_bp_disc, SET_DISC, if_index, disc_mode);
}

int get_bp_disc(int if_index)
{
	DO_BPLIB_GET_ARG_FN(get_bp_disc, GET_DISC, if_index);
}

int get_bp_disc_change(int if_index)
{
	DO_BPLIB_GET_ARG_FN(get_bp_disc_change, GET_DISC_CHANGE, if_index);
}

int set_bp_dis_disc(int if_index, int dis_disc)
{
	DO_BPLIB_SET_ARG_FN(set_bp_dis_disc, SET_DIS_DISC, if_index, dis_disc);
}

int get_bp_dis_disc(int if_index)
{
	DO_BPLIB_GET_ARG_FN(get_bp_dis_disc, GET_DIS_DISC, if_index);
}

int set_bp_disc_pwup(int if_index, int disc_mode)
{
	DO_BPLIB_SET_ARG_FN(set_bp_disc_pwup, SET_DISC_PWUP, if_index,
			    disc_mode);
}

int get_bp_disc_pwup(int if_index)
{
	DO_BPLIB_GET_ARG_FN(get_bp_disc_pwup, GET_DISC_PWUP, if_index);
}

int set_wd_exp_mode(int if_index, int mode)
{
	DO_BPLIB_SET_ARG_FN(set_wd_exp_mode, SET_WD_EXP_MODE, if_index, mode);
}

int get_wd_exp_mode(int if_index)
{
	DO_BPLIB_GET_ARG_FN(get_wd_exp_mode, GET_WD_EXP_MODE, if_index);
}

int set_wd_autoreset(int if_index, int time)
{
	DO_BPLIB_SET_ARG_FN(set_wd_autoreset, SET_WD_AUTORESET, if_index, time);
}

int get_wd_autoreset(int if_index)
{
	DO_BPLIB_GET_ARG_FN(get_wd_autoreset, GET_WD_AUTORESET, if_index);
}

int set_tpl(int if_index, int tpl_mode)
{
	DO_BPLIB_SET_ARG_FN(set_tpl, SET_TPL, if_index, tpl_mode);
}

int get_tpl(int if_index)
{
	DO_BPLIB_GET_ARG_FN(get_tpl, GET_TPL, if_index);
}

int set_bp_hw_reset(int if_index, int mode)
{
	DO_BPLIB_SET_ARG_FN(set_tpl, SET_BP_HW_RESET, if_index, mode);
}

int get_bp_hw_reset(int if_index)
{
	DO_BPLIB_GET_ARG_FN(get_tpl, GET_BP_HW_RESET, if_index);
}

int get_bypass_info(int if_index, struct bp_info *bp_info)
{
	int ret = 0;
	if (is_dev_sd(if_index)) {
		SET_BPLIB_INT_FN2(get_bypass_info, int, if_index,
				  struct bp_info *, bp_info, ret);
	} else {
		static int (*ioctl) (struct net_device *, struct ifreq *, int);
		struct net_device *dev;

		struct net_device *n;
		for_each_netdev_safe(&init_net, dev, n) {
			if (dev->ifindex == if_index) {
				struct if_bypass_info *bypass_cb;
				struct ifreq ifr;

				memset(&ifr, 0, sizeof(ifr));
				bypass_cb = (struct if_bypass_info *)&ifr;
				bypass_cb->cmd = GET_BYPASS_INFO;

				if ((dev->netdev_ops) &&
				    (ioctl = dev->netdev_ops->ndo_do_ioctl)) {
					ret = ioctl(dev, &ifr, SIOCGIFBYPASS);
				}

				else
					ret = -1;
				if (ret == 0)
					memcpy(bp_info, &bypass_cb->bp_info,
					       sizeof(struct bp_info));
				ret = (ret < 0 ? -1 : 0);
				break;
			}
		}
	}
	return ret;
}

int init_lib_module()
{

	printk(VERSION);
	return 0;
}

void cleanup_lib_module()
{
}

EXPORT_SYMBOL_NOVERS(is_bypass);
EXPORT_SYMBOL_NOVERS(get_bypass_slave);
EXPORT_SYMBOL_NOVERS(get_bypass_caps);
EXPORT_SYMBOL_NOVERS(get_wd_set_caps);
EXPORT_SYMBOL_NOVERS(set_bypass);
EXPORT_SYMBOL_NOVERS(get_bypass);
EXPORT_SYMBOL_NOVERS(get_bypass_change);
EXPORT_SYMBOL_NOVERS(set_dis_bypass);
EXPORT_SYMBOL_NOVERS(get_dis_bypass);
EXPORT_SYMBOL_NOVERS(set_bypass_pwoff);
EXPORT_SYMBOL_NOVERS(get_bypass_pwoff);
EXPORT_SYMBOL_NOVERS(set_bypass_pwup);
EXPORT_SYMBOL_NOVERS(get_bypass_pwup);
EXPORT_SYMBOL_NOVERS(set_bypass_wd);
EXPORT_SYMBOL_NOVERS(get_bypass_wd);
EXPORT_SYMBOL_NOVERS(get_wd_expire_time);
EXPORT_SYMBOL_NOVERS(reset_bypass_wd_timer);
EXPORT_SYMBOL_NOVERS(set_std_nic);
EXPORT_SYMBOL_NOVERS(get_std_nic);
EXPORT_SYMBOL_NOVERS(set_tx);
EXPORT_SYMBOL_NOVERS(get_tx);
EXPORT_SYMBOL_NOVERS(set_tap);
EXPORT_SYMBOL_NOVERS(get_tap);
EXPORT_SYMBOL_NOVERS(get_tap_change);
EXPORT_SYMBOL_NOVERS(set_dis_tap);
EXPORT_SYMBOL_NOVERS(get_dis_tap);
EXPORT_SYMBOL_NOVERS(set_tap_pwup);
EXPORT_SYMBOL_NOVERS(get_tap_pwup);
EXPORT_SYMBOL_NOVERS(set_bp_disc);
EXPORT_SYMBOL_NOVERS(get_bp_disc);
EXPORT_SYMBOL_NOVERS(get_bp_disc_change);
EXPORT_SYMBOL_NOVERS(set_bp_dis_disc);
EXPORT_SYMBOL_NOVERS(get_bp_dis_disc);
EXPORT_SYMBOL_NOVERS(set_bp_disc_pwup);
EXPORT_SYMBOL_NOVERS(get_bp_disc_pwup);
EXPORT_SYMBOL_NOVERS(set_wd_exp_mode);
EXPORT_SYMBOL_NOVERS(get_wd_exp_mode);
EXPORT_SYMBOL_NOVERS(set_wd_autoreset);
EXPORT_SYMBOL_NOVERS(get_wd_autoreset);
EXPORT_SYMBOL_NOVERS(set_tpl);
EXPORT_SYMBOL_NOVERS(get_tpl);
EXPORT_SYMBOL_NOVERS(set_bp_hw_reset);
EXPORT_SYMBOL_NOVERS(get_bp_hw_reset);
EXPORT_SYMBOL_NOVERS(get_bypass_info);

module_init(init_lib_module);
module_exit(cleanup_lib_module);