ib-net.h

linux下的无线宽带驱动

/* iBurst (TM) compatible driver for 2.6 Linux kernel.
 * based on the original ArrayComm (TM) iBurst (TM) driver.
 * Nicholas Jefferson <[e-mail]>
 * 11 May 2005
 *
 * 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.
 */

#include <linux/netdevice.h>
#include <linux/wireless.h>

#define IB_PROTO 0xac
#define STATUS_READY 0x06

/*
 * if macro is undefined, define it to be a noop
 */
#ifndef SET_MODULE_OWNER
#define SET_MODULE_OWNER while (0) {}
#endif

/**
 * enum ib_net_flag - radio frame flag field.
 */
enum ib_net_flag
{
	FLAG_BROADCAST = 0x08,
	FLAG_EXTENSION = 0x80,
};

/**
 * struct ib_net_driver_t - driver callback functions.
 * @poll: called by ib_net_poll, ib_net_tx_start.
 * @tx_timeout: called by ib_net_tx_timeout.
 * @close: called by ib_net_close.
 */
struct ib_net_driver_t {
	void (*poll)(void*);
	void (*tx_timeout)(void*);
	int (*open)(void*);
	void (*rx_parse)(void*);
	int (*close)(void*);
};

/**
 * struct ib_net_radio_t - radio frame header.
 * @word: packet length and flags.
 *     word[0].2 word[0].1 word[0].0 word[1]: packet length.
 *     word[0].3: broadcast flag.
 *     word[0].6 word[0].5 word[0].4: priority field (ignore this field).
 *     word[0].7: extension flag (drop packet if set).
 * @packet: packet identifier.
 * @check: ones' complement of word[1].
 * @proto: next protocol field.
 * @payload: payload.
 */
struct ib_net_radio_t {
	unsigned char word[2];
	unsigned char packet;
	unsigned char check;
	unsigned char proto[2];
	unsigned char payload[0];
};

#define IB_NET_RADIO_HEAD sizeof(struct ib_net_radio_t)
#define IB_NET_RADIO_SIZE ((IB_NET_RADIO_HEAD + ETH_DATA_LEN + 31) & ~31)
#define IB_NET_NBUF(word0, word1) ((((word0) & 0x07) << 8) | (word1))

/**
 * struct ib_net_ether_t - ethernet frame header.
 * @dest: destination MAC address.
 * @source: source MAC address.
 * @proto: next protocol field.
 * @payload: payload.
 */
struct ib_net_ether_t {
	unsigned char dest[ETH_ALEN];
	unsigned char source[ETH_ALEN];
	unsigned char proto[2];
	unsigned char payload[0];
};

#define IB_NET_ETHER_HEAD sizeof(struct ib_net_ether_t)

/**
 * struct ib_net_modem_t - modem state.
 * NTJ: 1.3.4: added 1 byte to buffers for possible padding
 *
 * @netdev: network device.
 * @stats: device statistics.
 * @wstats: wireless statistics.
 * @status: network device status; used by ib_net_close.
 * @driver: driver callback functions.
 * @pdriver: instance for driver callback functions.
 * @rx_buf: buffer to receive one iBurst radio cell.
 * @tx_buf: buffer to transmit one iBurst radio cell.
 * @tx_queue: transmit cell queue.
 * @task_queue: bottom half handler.
 */
struct ib_net_modem_t {
	struct net_device *netdev;
	struct net_device_stats stats;
	struct iw_statistics wstats;
	int pc_status, ut_status, uprate, downrate;
	struct ib_net_driver_t *driver;
	void *pdriver;
	unsigned char rx_buf[IB_NET_RADIO_SIZE + 1];
	unsigned char tx_buf[IB_NET_RADIO_SIZE + 1];
	struct sk_buff_head tx_queue;
	struct work_struct work_queue;
};

/**
 * ib_net_lock - spin lock for entire driver.
 */
extern spinlock_t ib_lock;

/**
 * ib_net_addr - set network device MAC address.
 * @modem: modem state.
 * @addr: MAC address.
 */
static inline void ib_net_addr(struct ib_net_modem_t *modem,
		unsigned char *addr)
{
	memcpy(modem->netdev->dev_addr, addr, ETH_ALEN);
	modem->netdev->dev_addr[0] &= ~1; /* hack - make unicast */
}

/**
 * ib_net_attach - attach network device.
 * @modem: modem state.
 */
static inline void ib_net_attach(struct ib_net_modem_t *modem)
{
	netif_device_attach(modem->netdev);
}

/**
 * ib_net_detach - detach network device.
 * @modem: modem state.
 */
static inline void ib_net_detach(struct ib_net_modem_t *modem)
{
	netif_device_detach(modem->netdev);
}

/**
 * ib_net_schedule - schedule bottom half handler.
 * @modem: modem state.
 */
static inline void ib_net_schedule(struct ib_net_modem_t *modem)
{
	schedule_work(&modem->work_queue);
}

/**
 * ib_net_flush - flush workqueue.
 * @modem: modem state.
 */
static inline void ib_net_flush(struct ib_net_modem_t *modem)
{
	flush_scheduled_work();
}

static inline void ib_net_ut_status(struct ib_net_modem_t *modem,
		int ut_status)
{
	if ((ut_status ^ modem->ut_status) & STATUS_READY) {
		if (ut_status & STATUS_READY)
			netif_carrier_on(modem->netdev);
		else
			netif_carrier_off(modem->netdev);
	}
	modem->ut_status = ut_status;
}

extern int ib_net_register(struct net_device **netdev);
extern void ib_net_deregister(struct ib_net_modem_t *modem);
extern void ib_net_rx_parse(struct ib_net_modem_t *modem, int nbuf);
extern int ib_net_tx_prepare(struct ib_net_modem_t *modem);