/******************************************************************************/
/*                                                                            */
/* 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                                                                   */
/*                                                                            */
/******************************************************************************/

#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");

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

	bypass_cb = (struct if_bypass *)ifr;
	bypass_cb->cmd = cmd;
	bypass_cb->data = *data;

	if (dev->netdev_ops && dev->netdev_ops->ndo_do_ioctl) {
		ret = dev->netdev_ops->ndo_do_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;
}

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

	while ((pdev = pci_get_class(PCI_CLASS_NETWORK_ETHERNET << 8, pdev))) {
		dev = pci_get_drvdata(pdev);
		if ((dev != 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;
}

static 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;
}
EXPORT_SYMBOL(is_bypass);

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

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

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

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

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

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

static 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);
}
EXPORT_SYMBOL(set_dis_bypass);

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

static 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);
}
EXPORT_SYMBOL(set_bypass_pwoff);

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

static 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);
}
EXPORT_SYMBOL(set_bypass_pwup);

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

static int set_bypass_wd(int if_index, int ms_timeout, int *ms_timeout_set)
{
	int data = ms_timeout;
	int 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;
}
EXPORT_SYMBOL(set_bypass_wd);

static int get_bypass_wd(int if_index, int *ms_timeout_set)
{
	int *data = ms_timeout_set;
	int 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;
}
EXPORT_SYMBOL(get_bypass_wd);

static 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;
}
EXPORT_SYMBOL(get_wd_expire_time);

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

static 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);
}
EXPORT_SYMBOL(set_std_nic);

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

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

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

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

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

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

static 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);
}
EXPORT_SYMBOL(set_dis_tap);

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

static 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);
}
EXPORT_SYMBOL(set_tap_pwup);

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

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

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

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

static 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);
}
EXPORT_SYMBOL(set_bp_dis_disc);

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

static 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);
}
EXPORT_SYMBOL(set_bp_disc_pwup);

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

static 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);
}
EXPORT_SYMBOL(set_wd_exp_mode);

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

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

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

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

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

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

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

static 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 {
		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 &&
					dev->netdev_ops->ndo_do_ioctl)
					ret = dev->netdev_ops->ndo_do_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;
}
EXPORT_SYMBOL(get_bypass_info);

static int __init init_lib_module(void)
{
	printk(VERSION);
	return 0;
}

static void __exit cleanup_lib_module(void)
{
}

module_init(init_lib_module);
module_exit(cleanup_lib_module);