e_sendpage,
};
网卡控制因为涉及到的知识点比较多,上面只是从宏观上对数据流程做了一个简单的介绍,深入到其中的每个知识点,都会牵扯出一系列文章,读者需要自己去一个个的慢慢深入,希望本文能够对刚刚接触网络驱动的读者有所帮助和启发【gliethttp.Leith】

wireless extention扩展接口Blog作者的回复:
wlan_add_card=>
wlan_create_thread(wlan_service_main_thread, &priv->MainThread, "wlan_main_service");
=>wlan_service_main_thread=>wlan_exec_next_cmd=>
将调用wlan_enter_ps和wlan_exit_ps


sbi_interrupt=>从sdio口上传来的中断数据,sdio_irq_thread=>process_sdio_pending_irqs=>调用func->irq_handler(func);即本.
在mmc_signal_sdio_irq=>将调用wake_up_process(host->sdio_irq_thread);来唤醒该irq处理线程,可能还有其他命令需要处理wlan_exec_next_cmd
这个pxamci_irq就是mmc的物理irq中断了,pxamci_irq=>mmc_signal_sdio_irq(host->mmc);

wlan_exec_next_cmd=>只要cmd链表上CmdNode还存在,
那么就会执行wlan_dnld_cmd_to_fw(wlan_private * priv, CmdCtrlNode * CmdNode)将CmdNode中的数据下发下去,
然后重新触发wlan_mod_timer(&Adapter->MrvDrvCommandTimer, MRVDRV_TIMER_5S);
也就是wlan_cmd_timeout_func命令超时处理函数,
在cmd已经有了恢复之后,在主线程中调用wlan_process_cmdresp,立即调用wlan_cancel_timer(&Adapter->MrvDrvCommandTimer);来删除定时器

wlan_service_main_thread=>每次唤醒都会检查
====
/* Execute the next command */
if (!priv->wlan_dev.cmd_sent && !Adapter->CurCmd)
wlan_exec_next_cmd(priv);
====


wlan_prepare_cmd=>
wlan_hostcmd_ioctl=>
获取一个空闲的CmdNode节点wlan_get_cmd_node,当完成赋值之后,执行如下语句,将CmdNode节点添加到处理队列中:
wlan_insert_cmd_to_pending_q(Adapter, CmdNode, TRUE);
wake_up_interruptible(&priv->MainThread.waitQ);
另外在数组中
/*
* iwconfig settable callbacks
*/
static const iw_handler wlan_handler[]这个数组中全部是回调函数,

/** wlan_handler_def */
struct iw_handler_def wlan_handler_def = {
num_standard:sizeof(wlan_handler) / sizeof(iw_handler),
num_private:sizeof(wlan_private_handler) / sizeof(iw_handler),
num_private_args:sizeof(wlan_private_args) / sizeof(struct iw_priv_args),
standard:(iw_handler *) wlan_handler,
private:(iw_handler *) wlan_private_handler,
private_args:(struct iw_priv_args *) wlan_private_args,
#if WIRELESS_EXT > 20
get_wireless_stats:wlan_get_wireless_stats,
#endif
};
在wlan_add_card函数中
dev->wireless_handlers = (struct iw_handler_def *) &wlan_handler_def;

===============在kernel的net中使用wireless extention扩展接口

static iw_handler get_handler(struct net_device *dev, unsigned int cmd)
{
/* Don't "optimise" the followi
ng variable, it will crash */
unsigned int index; /* *MUST* be unsigned */

/* Check if we have some wireless handlers defined */