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wanpipe/patches/kdrivers/src/net/sdla_sdlc.c

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/*****************************************************************************
* wanpipe_sdlc.c SDLC driver module.
*
* Authors: Nenad Corbic <ncorbic@sangoma.com>
*
* Copyright: (c) 2002 Sangoma Technologies Inc.
*
* 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.
* ============================================================================
* Jul 24 2002 Nenad Corbic Initial Version
*****************************************************************************/
#include <linux/wanpipe_includes.h>
#include <linux/wanpipe_defines.h>
#include <linux/wanpipe.h> /* WANPIPE common user API definitions */
#include <linux/wanrouter.h> /* WAN router definitions */
#include <linux/sdlapci.h>
#include <linux/wanproc.h>
#include <linux/if_wanpipe_common.h> /* Socket Driver common area */
#include <linux/if_wanpipe.h>
#include <linux/sdla_sdlc.h> /* CHDLC firmware API definitions */
/****** Defines & Macros ****************************************************/
/* Private critical flags */
enum {
REG_CRIT = PRIV_CRIT
};
/* reasons for enabling the timer interrupt on the adapter */
#define TMR_INT_ENABLED_UDP 0x01
#define TMR_INT_ENABLED_UPDATE 0x02
#define CHDLC_DFLT_DATA_LEN 1500 /* default MTU */
#define CHDLC_HDR_LEN 1
#define IFF_POINTTOPOINT 0x10
#define CHDLC_API 0x01
#define PORT(x) (x == 0 ? "PRIMARY" : "SECONDARY" )
#define MAX_BH_BUFF 10
#define CRC_LENGTH 2
#define PPP_HEADER_LEN 4
#define MAX_TRACE_LEN 25
#define MAX_TRACE_ASCII_LEN MAX_TRACE_LEN*3+5
#define MAX_CMD_RETRY 10 /* max number of firmware retries */
#ifndef ARPHRD_SDLC
#define ARPHRD_SDLC 514
#endif
/******Data Structures*****************************************************/
/* This structure is placed in the private data area of the device structure.
* The card structure used to occupy the private area but now the following
* structure will incorporate the card structure along with CHDLC specific data
*/
typedef struct sdlc_private_area
{
wanpipe_common_t common;
sdla_t *card;
int TracingEnabled; /* For enabling Tracing */
unsigned long curr_trace_addr; /* Used for Tracing */
unsigned long start_trace_addr;
unsigned long end_trace_addr;
unsigned long base_addr_trace_buffer;
unsigned long end_addr_trace_buffer;
unsigned short number_trace_elements;
unsigned available_buffer_space;
unsigned long router_start_time;
unsigned char route_status;
unsigned char route_removed;
unsigned long tick_counter; /* For 5s timeout counter */
unsigned long router_up_time;
u32 IP_address; /* IP addressing */
u32 IP_netmask;
unsigned char mc; /* Mulitcast support on/off */
unsigned short udp_pkt_lgth; /* udp packet processing */
char udp_pkt_src;
unsigned short timer_int_enabled;
char update_comms_stats; /* updating comms stats */
unsigned long trace_state;
/* Entry in proc fs per each interface */
struct proc_dir_entry* dent;
unsigned char ignore_modem;
unsigned char udp_pkt_data[sizeof(wan_udp_pkt_t)+10];
atomic_t udp_pkt_len;
wp_sdlc_reg_t wp_sdlc_register;
} sdlc_private_area_t;
/* Route Status options */
#define NO_ROUTE 0x00
#define ADD_ROUTE 0x01
#define ROUTE_ADDED 0x02
#define REMOVE_ROUTE 0x03
/****** Function Prototypes *************************************************/
/* WAN link driver entry points. These are called by the WAN router module. */
static int update (wan_device_t* wandev);
static int new_if (wan_device_t* wandev, netdevice_t* dev,
wanif_conf_t* conf);
static int del_if (wan_device_t* wandev, netdevice_t* dev);
/* Network device interface */
static int if_init (netdevice_t* dev);
static int if_open (netdevice_t* dev);
static int if_close (netdevice_t* dev);
static int if_send (struct sk_buff* skb, netdevice_t* dev);
static struct net_device_stats* if_stats (netdevice_t* dev);
/* CHDLC Firmware interface functions */
static int sdlc_configure (sdla_t* card, void* data);
static int sdlc_comm_enable (sdla_t* card);
static int sdlc_comm_disable (sdla_t* card);
static int sdlc_read_version (sdla_t* card, char* str);
static int sdlc_set_intr_mode (sdla_t* card, unsigned mode);
static int sdlc_send (sdla_t* card, void* data, unsigned len);
static int sdlc_list_stations_with_ifrms (sdla_t* card);
static int sdlc_read_comm_err_stats (sdla_t* card);
static int sdlc_read_op_stats (sdla_t* card);
static int config_sdlc (sdla_t *card);
/* Miscellaneous CHDLC Functions */
static int set_sdlc_config (sdla_t* card);
static int sdlc_error (sdla_t *card, int err, wan_mbox_t *mb);
static int process_sdlc_exception(sdla_t *card);
static int update_comms_stats(sdla_t* card,
sdlc_private_area_t* sdlc_priv_area);
static void port_set_state (sdla_t *card, int);
/* Interrupt handlers */
static WAN_IRQ_RETVAL wp_sdlc_isr (sdla_t* card);
static void rx_intr (sdla_t* card);
static void tx_intr(sdla_t *card);
static void timer_intr(sdla_t *);
/* Miscellaneous functions */
static int intr_test( sdla_t* card);
static int process_udp_mgmt_pkt(sdla_t* card, netdevice_t* dev,
sdlc_private_area_t* sdlc_priv_area,int local_dev);
static int chdlc_get_config_info(void* priv, struct seq_file* m, int*);
static int chdlc_get_status_info(void* priv, struct seq_file* m, int*);
static int chdlc_set_dev_config(struct file*, const char*, unsigned long, void *);
static int chdlc_set_if_info(struct file*, const char*, unsigned long, void *);
void send_oob_msg(sdla_t *card, wan_mbox_t *mb);
/****** Public Functions ****************************************************/
/*============================================================================
* Cisco HDLC protocol initialization routine.
*
* This routine is called by the main WANPIPE module during setup. At this
* point adapter is completely initialized and firmware is running.
* o read firmware version (to make sure it's alive)
* o configure adapter
* o initialize protocol-specific fields of the adapter data space.
*
* Return: 0 o.k.
* < 0 failure.
*/
int wp_sdlc_init (sdla_t* card, wandev_conf_t* conf)
{
unsigned char port_num;
int err;
union{
char str[80];
} u;
volatile wan_mbox_t* mb;
wan_mbox_t* mb1;
/* Verify configuration ID */
if (conf->config_id != WANCONFIG_SDLC) {
printk(KERN_INFO "%s: invalid configuration ID %u!\n",
card->devname, conf->config_id);
return -EINVAL;
}
/* Find out which Port to use */
if (conf->comm_port == WANOPT_PRI){
card->u.sdlc.comm_port = conf->comm_port;
}else{
printk(KERN_INFO "%s: ERROR - Invalid Port Selected!\n",
card->wandev.name);
return -EINVAL;
}
/* Initialize protocol-specific fields */
/* Set a pointer to the actual mailbox in the allocated virtual
* memory area */
/* Alex Apr 8 2004 Sangoma ISA card */
card->mbox_off = BASE_ADDR_OF_MB_STRUCTS;
card->rxmb_off = 0xE230;
mb = &card->wan_mbox;
mb1 = &card->wan_mbox;
if (!card->configured){
/* Wait for the board to initialize. */
udelay(500);
}
/* TE1 and 56K boards are not supported by this firmware */
if (IS_TE1_MEDIA(&conf->fe_cfg) || IS_56K_MEDIA(&conf->fe_cfg)) {
printk(KERN_INFO "%s: SDLC protocol doesn't support TE1 or 56K cards\n",
card->devname);
return -EINVAL;
}
if (sdlc_read_version(card, u.str))
return -EIO;
printk(KERN_INFO "%s: Running SDLC firmware v%s\n",
card->devname,u.str);
card->isr = &wp_sdlc_isr;
card->poll = NULL;
card->exec = NULL;
card->wandev.update = &update;
card->wandev.new_if = &new_if;
card->wandev.del_if = &del_if;
card->wandev.udp_port = conf->udp_port;
card->wandev.new_if_cnt = 0;
// Proc fs functions
card->wandev.get_config_info = &chdlc_get_config_info;
card->wandev.get_status_info = &chdlc_get_status_info;
card->wandev.set_dev_config = &chdlc_set_dev_config;
card->wandev.set_if_info = &chdlc_set_if_info;
card->wandev.ttl = conf->ttl;
card->wandev.interface = conf->interface;
card->wandev.clocking = conf->clocking;
port_num = card->u.sdlc.comm_port;
/* Setup Port Bps */
if(card->wandev.clocking) {
if(conf->bps > MAX_PERMITTED_BAUD_RATE) {
conf->bps = MAX_PERMITTED_BAUD_RATE;
printk(KERN_INFO "%s: Baud too high!\n",
card->wandev.name);
printk(KERN_INFO "%s: Baud rate set to %u bps\n",
card->wandev.name, MAX_PERMITTED_BAUD_RATE);
}
card->wandev.bps = conf->bps;
}else{
card->wandev.bps = 0;
}
/* For Primary Port 0 */
card->wandev.mtu = (conf->mtu >= MIN_PERMITTED_I_FIELD_LENGTH) ?
wp_min(conf->mtu, MAX_PERMITTED_I_FIELD_LENGTH) :
MAX_PERMITTED_I_FIELD_LENGTH;
/* Alex Apr 8 2004 Sangoma ISA card */
card->flags_off = ADDR_INTERRUPT_REPORT_INTERFACE_BYTE;
card->intr_type_off =
card->flags_off +
offsetof(INTERRUPT_INFORMATION_STRUCT, interrupt_type);
card->intr_perm_off =
card->flags_off +
offsetof(INTERRUPT_INFORMATION_STRUCT, interrupt_permission);
/* This is for the ports link state */
card->wandev.state = WAN_DUALPORT;
card->u.sdlc.state = WAN_DISCONNECTED;
if (card->u.sdlc.comm_enabled){
sdlc_comm_disable(card);
port_set_state(card, WAN_DISCONNECTED);
}
memcpy(&card->wandev.sdlc_cfg,&conf->u.sdlc,sizeof(wan_sdlc_conf_t));
if (set_sdlc_config(card)) {
printk(KERN_INFO "%s: SDLC Configuration Failed: Off=%i\n",
card->devname,mb->wan_data_len);
return -EINVAL;
}
if (!card->wandev.piggyback){
err = intr_test(card);
if(err || (card->timer_int_enabled < MAX_INTR_TEST_COUNTER)) {
printk(KERN_INFO "%s: Interrupt test failed (%i)\n",
card->devname, card->timer_int_enabled);
printk(KERN_INFO "%s: Please choose another interrupt\n",
card->devname);
return -EIO;
}
printk(KERN_INFO "%s: Interrupt test passed (%i)\n",
card->devname, card->timer_int_enabled);
}
err=config_sdlc(card);
if (err!=0){
return err;
}
printk(KERN_INFO "\n");
return 0;
}
/******* WAN Device Driver Entry Points *************************************/
/*============================================================================
* Update device status & statistics
* This procedure is called when updating the PROC file system and returns
* various communications statistics. These statistics are accumulated from 3
* different locations:
* 1) The 'if_stats' recorded for the device.
* 2) Communication error statistics on the adapter.
* 3) CHDLC operational statistics on the adapter.
* The board level statistics are read during a timer interrupt. Note that we
* read the error and operational statistics during consecitive timer ticks so
* as to minimize the time that we are inside the interrupt handler.
*
*/
static int update (wan_device_t* wandev)
{
sdla_t* card = wandev->private;
netdevice_t* dev;
volatile sdlc_private_area_t* sdlc_priv_area;
unsigned long timeout;
/* sanity checks */
if((wandev == NULL) || (wandev->private == NULL))
return -EFAULT;
if(wandev->state == WAN_UNCONFIGURED)
return -ENODEV;
/* more sanity checks */
if(!card->flags_off)
return -ENODEV;
dev = WAN_DEVLE2DEV(WAN_LIST_FIRST(&card->wandev.dev_head));
if(dev == NULL)
return -ENODEV;
if((sdlc_priv_area=dev->priv) == NULL)
return -ENODEV;
if(sdlc_priv_area->update_comms_stats){
return -EAGAIN;
}
/* we will need 2 timer interrupts to complete the */
/* reading of the statistics */
sdlc_priv_area->update_comms_stats = 2;
card->hw_iface.set_bit(card->hw, card->intr_perm_off, INTERRUPT_ON_TIMER);
sdlc_priv_area->timer_int_enabled = TMR_INT_ENABLED_UPDATE;
/* wait a maximum of 1 second for the statistics to be updated */
timeout = jiffies;
for(;;) {
if(sdlc_priv_area->update_comms_stats == 0)
break;
if ((jiffies - timeout) > (1 * HZ)){
sdlc_priv_area->update_comms_stats = 0;
sdlc_priv_area->timer_int_enabled &=
~TMR_INT_ENABLED_UPDATE;
return -EAGAIN;
}
}
return 0;
}
/*============================================================================
* Create new logical channel.
* This routine is called by the router when ROUTER_IFNEW IOCTL is being
* handled.
* o parse media- and hardware-specific configuration
* o make sure that a new channel can be created
* o allocate resources, if necessary
* o prepare network device structure for registaration.
*
* Return: 0 o.k.
* < 0 failure (channel will not be created)
*/
static int new_if (wan_device_t* wandev, netdevice_t* dev, wanif_conf_t* conf)
{
sdla_t* card = wandev->private;
sdlc_private_area_t* sdlc_priv_area;
int err = 0;
if ((conf->name[0] == '\0') || (strlen(conf->name) > WAN_IFNAME_SZ)) {
printk(KERN_INFO "%s: invalid interface name!\n",
card->devname);
return -EINVAL;
}
/* allocate and initialize private data */
sdlc_priv_area = kmalloc(sizeof(sdlc_private_area_t), GFP_KERNEL);
if(sdlc_priv_area == NULL){
return -ENOMEM;
}
memset(sdlc_priv_area, 0, sizeof(sdlc_private_area_t));
sdlc_priv_area->card = card;
/* initialize data */
strcpy(card->u.sdlc.if_name, conf->name);
sdlc_priv_area->common.sk = NULL;
sdlc_priv_area->common.state = WAN_CONNECTING;
sdlc_priv_area->common.dev = dev;
if(card->wandev.new_if_cnt > 0) {
err = -EEXIST;
goto new_if_error;
}
card->wandev.new_if_cnt++;
sdlc_priv_area->TracingEnabled = 0;
printk(KERN_INFO "%s: Firmware running in SDLC Mode\n",
wandev->name);
if(strcmp(conf->usedby, "STACK") == 0) {
printk(KERN_INFO "%s: Driver running in API STACK mode!\n",
wandev->name);
card->u.sdlc.usedby = STACK;
sdlc_priv_area->common.usedby=STACK;
}else{
printk(KERN_INFO "%s: Driver running in API mode!\n",
wandev->name);
card->u.sdlc.usedby = API;
sdlc_priv_area->common.usedby =API;
}
/* Get Multicast Information */
sdlc_priv_area->mc = conf->mc;
dev->init = &if_init;
dev->priv = sdlc_priv_area;
#if 0
/*
* Create interface file in proc fs.
*/
err = wanrouter_proc_add_interface(wandev,
&sdlc_priv_area->dent,
card->u.sdlc.if_name,
dev);
if (err){
printk(KERN_INFO
"%s: can't create /proc/net/router/sdlc/%s entry!\n",
card->devname, card->u.sdlc.if_name);
goto new_if_error;
}
#endif
return 0;
new_if_error:
if (sdlc_priv_area){
kfree(sdlc_priv_area);
}
dev->priv=NULL;
return err;
}
/*============================================================================
* Delete logical channel.
*/
static int del_if (wan_device_t* wandev, netdevice_t* dev)
{
sdlc_private_area_t *sdlc_priv_area = dev->priv;
sdla_t *card = sdlc_priv_area->card;
unsigned long smp_lock;
/* Delete interface name from proc fs. */
//wanrouter_proc_delete_interface(wandev, card->u.sdlc.if_name);
wan_spin_lock_irq(&wandev->lock,&smp_lock);
/* Bug Fix: Kernel 2.2.X
* We must manually remove the ioctl call binding
* since in some cases (mrouted) daemons continue
* to call ioctl() after the device has gone down */
dev->do_ioctl = NULL;
dev->hard_header = NULL;
dev->rebuild_header = NULL;
sdlc_set_intr_mode(card, 0);
if (card->u.sdlc.comm_enabled){
sdlc_comm_disable(card);
}
wan_spin_unlock_irq(&wandev->lock,&smp_lock);
port_set_state(card, WAN_DISCONNECTED);
return 0;
}
/**
* if_do_ioctl - Ioctl handler for fr
* @dev: Device subject to ioctl
* @ifr: Interface request block from the user
* @cmd: Command that is being issued
*
* This function handles the ioctls that may be issued by the user
* to control the settings of a FR. It does both busy
* and security checks. This function is intended to be wrapped by
* callers who wish to add additional ioctl calls of their own.
*/
/* SNMP */
static int if_do_ioctl(netdevice_t *dev, struct ifreq *ifr, int cmd)
{
sdlc_private_area_t* chan= (sdlc_private_area_t*)dev->priv;
unsigned long smp_flags;
sdla_t *card;
wan_udp_pkt_t *wan_udp_pkt;
wan_mbox_t *usr_mb, *mb;
int err=0;
char usedby=API;
if (!chan){
return -ENODEV;
}
card=chan->card;
mb=&card->wan_mbox;
if (chan->common.usedby == STACK){
//if (ifr->ifr_flags != STACK_IF_REQ){
// printk(KERN_INFO
// "%s: Stack if cmd request with invalid flag %i, expecting %i\n",
// card->devname,ifr->ifr_flags,STACK_IF_REQ);
// return -EINVAL;
//}
usedby=STACK;
}
switch(cmd){
case SIOC_WANPIPE_DEV_STATE:
err = chan->common.state;
break;
case SIOC_WANPIPE_BIND_SK:
if (!ifr){
err= -EINVAL;
break;
}
DEBUG_TEST("%s: SIOC_WANPIPE_BIND_SK \n",__FUNCTION__);
spin_lock_irqsave(&card->wandev.lock,smp_flags);
err=wan_bind_api_to_svc(chan,ifr->ifr_data);
spin_unlock_irqrestore(&card->wandev.lock,smp_flags);
break;
case SIOC_WANPIPE_UNBIND_SK:
if (!ifr){
err= -EINVAL;
break;
}
DEBUG_TEST("%s: SIOC_WANPIPE_UNBIND_SK \n",__FUNCTION__);
spin_lock_irqsave(&card->wandev.lock,smp_flags);
err=wan_unbind_api_from_svc(chan,ifr->ifr_data);
spin_unlock_irqrestore(&card->wandev.lock,smp_flags);
break;
case SIOC_WANPIPE_PIPEMON:
NET_ADMIN_CHECK();
if (atomic_read(&chan->udp_pkt_len) != 0){
return -EBUSY;
}
atomic_set(&chan->udp_pkt_len,MAX_LGTH_UDP_MGNT_PKT);
/* For performance reasons test the critical
* here before spin lock */
if (test_bit(0,&card->in_isr)){
atomic_set(&chan->udp_pkt_len,0);
return -EBUSY;
}
wan_udp_pkt=(wan_udp_pkt_t*)chan->udp_pkt_data;
if (copy_from_user(&wan_udp_pkt->wan_udp_hdr,
ifr->ifr_data,
sizeof(wan_udp_hdr_t))){
atomic_set(&chan->udp_pkt_len,0);
return -EFAULT;
}
spin_lock_irqsave(&card->wandev.lock, smp_flags);
/* We have to check here again because we don't know
* what happened during spin_lock */
if (test_bit(0,&card->in_isr)) {
printk(KERN_INFO "%s:%s Pipemon command failed, Driver busy: try again.\n",
card->devname,dev->name);
atomic_set(&chan->udp_pkt_len,0);
spin_unlock_irqrestore(&card->wandev.lock, smp_flags);
return -EBUSY;
}
process_udp_mgmt_pkt(card,dev,chan,1);
spin_unlock_irqrestore(&card->wandev.lock, smp_flags);
/* This area will still be critical to other
* PIPEMON commands due to udp_pkt_len
* thus we can release the irq */
if (atomic_read(&chan->udp_pkt_len) > sizeof(wan_udp_pkt_t)){
printk(KERN_INFO "%s: Error: Pipemon buf too bit on the way up! %i\n",
card->devname,atomic_read(&chan->udp_pkt_len));
atomic_set(&chan->udp_pkt_len,0);
return -EINVAL;
}
if (copy_to_user(ifr->ifr_data,&wan_udp_pkt->wan_udp_hdr,sizeof(wan_udp_hdr_t))){
atomic_set(&chan->udp_pkt_len,0);
return -EFAULT;
}
atomic_set(&chan->udp_pkt_len,0);
return 0;
case SIOC_WANPIPE_EXEC_CMD:
usr_mb=(wan_mbox_t*)ifr->ifr_ifru.ifru_data;
if (!usr_mb){
printk (KERN_INFO
"%s: Ioctl command %x, has no Mbox attached\n",
card->devname, cmd);
return -EINVAL;
}
if (usedby == STACK){
memcpy(&mb->wan_command,&usr_mb->wan_command,sizeof(wan_cmd_t)-1);
}else{
if (copy_from_user(&mb->wan_command, &usr_mb->wan_command,sizeof(wan_cmd_t)-1)){
printk(KERN_INFO "%s: SDLC Cmd: Failed to copy mb \n",card->devname);
err = -EFAULT;
break;
}
}
if (mb->wan_data_len){
if (usedby == STACK){
memcpy(&mb->wan_data[0], &usr_mb->wan_data[0] ,mb->wan_data_len);
}else{
if (copy_from_user(&mb->wan_data[0], &usr_mb->wan_data[0] ,mb->wan_data_len)){
printk(KERN_INFO "%s: SDLC Cmd: Failed to copy mb data: len= %i\n",
card->devname, mb->wan_data_len);
err = -EFAULT;
break;
}
}
}
spin_lock_irqsave(&card->wandev.lock,smp_flags);
err = card->hw_iface.cmd(card->hw, card->mbox_off, mb);
if (err != COMMAND_OK) {
spin_unlock_irqrestore(&card->wandev.lock,smp_flags);
break;
}
spin_unlock_irqrestore(&card->wandev.lock,smp_flags);
DEBUG_TEST("%s: CMD=0x%x Err=0x%X\n",
card->devname,
mb->wan_command,mb->wan_return_code);
/* copy the result back to our buffer */
if (usedby == STACK){
memcpy(&usr_mb->wan_command, &mb->wan_command,sizeof(wan_cmd_t)-1);
}else{
if (copy_to_user(&usr_mb->wan_command, &mb->wan_command,sizeof(wan_cmd_t)-1)){
err= -EFAULT;
break;
}
}
if (mb->wan_data_len) {
if (usedby == STACK){
memcpy(&usr_mb->wan_data[0], &mb->wan_data[0], mb->wan_data_len);
}else{
if (copy_to_user(&usr_mb->wan_data[0], &mb->wan_data[0], mb->wan_data_len)){
err= -EFAULT;
break;
}
}
}
break;
default:
return -EOPNOTSUPP;
}
return err;
}
/****** Network Device Interface ********************************************/
/*============================================================================
* Initialize Linux network interface.
*
* This routine is called only once for each interface, during Linux network
* interface registration. Returning anything but zero will fail interface
* registration.
*/
static int if_init (netdevice_t* dev)
{
sdlc_private_area_t* sdlc_priv_area = dev->priv;
sdla_t* card = sdlc_priv_area->card;
wan_device_t* wandev = &card->wandev;
/* NOTE: Most of the dev initialization was
* done in sppp_attach(), called by new_if()
* function. All we have to do here is
* to link four major routines below.
*/
/* Initialize device driver entry points */
dev->open = &if_open;
dev->stop = &if_close;
dev->hard_start_xmit = &if_send;
dev->get_stats = &if_stats;
#if defined(LINUX_2_4)||defined(LINUX_2_6)
dev->tx_timeout = NULL;
dev->watchdog_timeo = 0;
#endif
dev->do_ioctl = if_do_ioctl;
dev->type = ARPHRD_SDLC; /* This breaks the tcpdump */
dev->mtu = card->wandev.mtu+sizeof(wan_api_hdr_t);
/* Initialize hardware parameters */
dev->irq = wandev->irq;
dev->dma = wandev->dma;
dev->base_addr = wandev->ioport;
card->hw_iface.getcfg(card->hw, SDLA_MEMBASE, &dev->mem_start); //ALEX_TODAY wandev->maddr;
card->hw_iface.getcfg(card->hw, SDLA_MEMEND, &dev->mem_end); //ALEX_TODAY wandev->maddr + wandev->msize - 1;
/* Set transmit buffer queue length
* If we over fill this queue the packets will
* be droped by the kernel.
* sppp_attach() sets this to 10, but
* 100 will give us more room at low speeds.
*/
dev->tx_queue_len = 100;
return 0;
}
/*============================================================================
* Open network interface.
* o enable communications and interrupts.
* o prevent module from unloading by incrementing use count
*
* Return 0 if O.k. or errno.
*/
static int if_open (netdevice_t* dev)
{
sdlc_private_area_t* sdlc_priv_area = dev->priv;
sdla_t* card = sdlc_priv_area->card;
struct timeval tv;
/* Only one open per interface is allowed */
if (open_dev_check(dev))
return -EBUSY;
do_gettimeofday(&tv);
sdlc_priv_area->router_start_time = tv.tv_sec;
netif_start_queue(dev);
wanpipe_open(card);
port_set_state(card, WAN_CONNECTED);
if (sdlc_priv_area->common.usedby==API){
wan_wakeup_api(sdlc_priv_area);
}
return 0;
}
/*============================================================================
* Close network interface.
* o if this is the last close, then disable communications and interrupts.
* o reset flags.
*/
static int if_close (netdevice_t* dev)
{
sdlc_private_area_t* sdlc_priv_area = dev->priv;
sdla_t* card = sdlc_priv_area->card;
stop_net_queue(dev);
#if defined(LINUX_2_1)
dev->start=0;
#endif
wanpipe_close(card);
port_set_state(card, WAN_DISCONNECTED);
return 0;
}
/*============================================================================
* Send a packet on a network interface.
* o set tbusy flag (marks start of the transmission) to block a timer-based
* transmit from overlapping.
* o check link state. If link is not up, then drop the packet.
* o execute adapter send command.
* o free socket buffer
*
* Return: 0 complete (socket buffer must be freed)
* non-0 packet may be re-transmitted (tbusy must be set)
*
* Notes:
* 1. This routine is called either by the protocol stack or by the "net
* bottom half" (with interrupts enabled).
* 2. Setting tbusy flag will inhibit further transmit requests from the
* protocol stack and can be used for flow control with protocol layer.
*/
static int if_send (struct sk_buff* skb, netdevice_t* dev)
{
sdlc_private_area_t *sdlc_priv_area = dev->priv;
sdla_t *card = sdlc_priv_area->card;
unsigned long smp_flags;
int err=0;
if (skb == NULL){
/* If we get here, some higher layer thinks we've missed an
* tx-done interrupt.
*/
printk(KERN_INFO "%s: Received NULL skb buffer! interface %s got kicked!\n",
card->devname, dev->name);
wake_net_dev(dev);
return 0;
}
#if defined(LINUX_2_1)
if (dev->tbusy){
/* If our device stays busy for at least 5 seconds then we will
* kick start the device by making dev->tbusy = 0. We expect
* that our device never stays busy more than 5 seconds. So this
* is only used as a last resort.
*/
if((jiffies - sdlc_priv_area->tick_counter) < (5 * HZ)) {
return 1;
}
++card->wandev.stats.collisions;
printk (KERN_INFO "%s: Transmit timed out on %s\n", card->devname,dev->name);
netif_wake_queue (dev);
}
#endif
sdlc_priv_area->tick_counter=jiffies;
err=0;
if (test_and_set_bit(SEND_CRIT, (void*)&card->wandev.critical)){
printk(KERN_INFO "%s: Critical in if_send: %lx\n",
card->wandev.name,card->wandev.critical);
++card->wandev.stats.tx_dropped;
goto if_send_crit_exit;
}
if (card->wandev.state != WAN_CONNECTED){
++card->wandev.stats.tx_dropped;
goto if_send_crit_exit;
}
wan_spin_lock_irq(&card->wandev.lock,&smp_flags);
err=sdlc_send(card, skb->data, skb->len);
wan_spin_unlock_irq(&card->wandev.lock,&smp_flags);
if (err){
err=1;
}else{
++card->wandev.stats.tx_packets;
card->wandev.stats.tx_bytes += skb->len;
#if defined(LINUX_2_4)||defined(LINUX_2_6)
dev->trans_start = jiffies;
#endif
if (test_bit(0,&sdlc_priv_area->trace_state)){
int i;
DEBUG_EVENT("%s:%s: OUTPUT:\n",card->devname,dev->name);
for (i=0; i < skb->len; i++){
printk("%02X ",skb->data[i]);
}
printk("\n");
}
}
if_send_crit_exit:
if (err==0){
dev_kfree_skb_any(skb);
}
start_net_queue(dev);
clear_bit(SEND_CRIT, (void*)&card->wandev.critical);
return err;
}
/*============================================================================
* Get ethernet-style interface statistics.
* Return a pointer to struct enet_statistics.
*/
static struct net_device_stats* if_stats (netdevice_t* dev)
{
sdla_t *my_card;
sdlc_private_area_t* sdlc_priv_area;
/* Shutdown bug fix. In del_if() we kill
* dev->priv pointer. This function, gets
* called after del_if(), thus check
* if pointer has been deleted */
if ((sdlc_priv_area=dev->priv) == NULL)
return NULL;
my_card = sdlc_priv_area->card;
return &my_card->wandev.stats;
}
/****** Cisco HDLC Firmware Interface Functions *******************************/
/*============================================================================
* Read firmware code version.
* Put code version as ASCII string in str.
*/
static int sdlc_read_version (sdla_t* card, char* str)
{
wan_mbox_t* mb = &card->wan_mbox;
int len;
char err;
mb->wan_data_len = 0;
mb->wan_command = READ_CODE_VERSION;
err = card->hw_iface.cmd(card->hw, card->mbox_off, mb);
if(err != COMMAND_OK) {
sdlc_error(card,err,mb);
}else if (str) { /* is not null */
len = mb->wan_data_len;
memcpy(str, mb->wan_data, len);
str[len] = '\0';
}
return (err);
}
/*-----------------------------------------------------------------------------
* Configure CHDLC firmware.
*/
static int sdlc_configure (sdla_t* card, void* data)
{
int err;
wan_mbox_t *mb = &card->wan_mbox;
int data_length = sizeof(SDLC_CONFIGURATION_STRUCT);
int retry=10;
do {
mb->wan_data_len = data_length;
memcpy(mb->wan_data, data, data_length);
mb->wan_command = SET_SDLC_CONFIGURATION;
err = card->hw_iface.cmd(card->hw, card->mbox_off, mb);
if (err != COMMAND_OK)
sdlc_error (card, err, mb);
if (err != 0x30){
break;
}
}while((err!=COMMAND_OK) && --retry);
return err;
}
/*-----------------------------------------------------------------------------
* Configure CHDLC firmware.
*/
static int sdlc_read_config (sdla_t* card)
{
int err;
wan_mbox_t *mb = &card->wan_mbox;
mb->wan_data_len = 0;
mb->wan_command = READ_SDLC_CONFIGURATION;
err = card->hw_iface.cmd(card->hw, card->mbox_off, mb);
if (err != COMMAND_OK) sdlc_error (card, err, mb);
return err;
}
/*============================================================================
* Set interrupt mode -- HDLC Version.
*/
static int sdlc_set_intr_mode (sdla_t* card, unsigned mode)
{
wan_mbox_t* mb = &card->wan_mbox;
SDLC_INT_TRIGGERS_STRUCT* int_data =
(SDLC_INT_TRIGGERS_STRUCT *)mb->wan_data;
int err;
int_data->CHDLC_interrupt_triggers = mode;
int_data->IRQ = card->wandev.irq; // ALEX_TODAY card->hw.irq;
int_data->interrupt_timer = 1;
int_data->misc_interrupt_bits = 0;
mb->wan_data_len = sizeof(SDLC_INT_TRIGGERS_STRUCT);
mb->wan_command = SET_INTERRUPT_TRIGGERS;
err = card->hw_iface.cmd(card->hw, card->mbox_off, mb);
if (err != COMMAND_OK)
sdlc_error (card, err, mb);
return err;
}
/*============================================================================
* Enable communications.
*/
static int sdlc_comm_enable (sdla_t* card)
{
int err;
wan_mbox_t* mb = &card->wan_mbox;
mb->wan_data_len = 0;
mb->wan_command = ENABLE_COMMUNICATIONS;
err = card->hw_iface.cmd(card->hw, card->mbox_off, mb);
if (err != COMMAND_OK)
sdlc_error(card, err, mb);
else
card->u.sdlc.comm_enabled=1;
return err;
}
/*============================================================================
* Disable communications and Drop the Modem lines (DCD and RTS).
*/
static int sdlc_comm_disable (sdla_t* card)
{
int err;
wan_mbox_t* mb = &card->wan_mbox;
mb->wan_data_len = 0;
mb->wan_command = DISABLE_COMMUNICATIONS;
err = card->hw_iface.cmd(card->hw, card->mbox_off, mb);
if (err != COMMAND_OK)
sdlc_error(card,err,mb);
return err;
}
/*============================================================================
* Read communication error statistics.
*/
static int sdlc_read_comm_err_stats (sdla_t* card)
{
int err;
wan_mbox_t* mb = &card->wan_mbox;
mb->wan_data_len = 0;
mb->wan_command = READ_COMMS_ERR_STATISTICS;
err = card->hw_iface.cmd(card->hw, card->mbox_off, mb);
if (err != COMMAND_OK)
sdlc_error(card,err,mb);
return err;
}
/*============================================================================
* Read CHDLC operational statistics.
*/
static int sdlc_read_op_stats (sdla_t* card)
{
int err;
wan_mbox_t* mb = &card->wan_mbox;
mb->wan_data_len = 0;
mb->wan_command = READ_OPERATIONAL_STATISTICS;
err = card->hw_iface.cmd(card->hw, card->mbox_off, mb);
if (err != COMMAND_OK)
sdlc_error(card,err,mb);
return err;
}
/*============================================================================
* Update communications error and general packet statistics.
*/
static int update_comms_stats(sdla_t* card, sdlc_private_area_t* sdlc_priv_area)
{
wan_mbox_t* mb = &card->wan_mbox;
COMMS_ERROR_STATS_STRUCT *err_stats;
SDLC_OPERATIONAL_STATS_STRUCT *op_stats;
/* on the first timer interrupt, read the comms error statistics */
if(sdlc_priv_area->update_comms_stats == 2) {
if(sdlc_read_comm_err_stats(card))
return 1;
err_stats = (COMMS_ERROR_STATS_STRUCT *)mb->wan_data;
card->wandev.stats.rx_over_errors =
err_stats->Rx_overrun_err_cnt;
card->wandev.stats.rx_crc_errors =
err_stats->CRC_err_cnt;
card->wandev.stats.rx_frame_errors =
err_stats->Rx_abort_cnt;
card->wandev.stats.rx_fifo_errors =
err_stats->Rx_frm_lgth_err_cnt;
card->wandev.stats.rx_missed_errors =
card->wandev.stats.rx_fifo_errors;
card->wandev.stats.tx_aborted_errors =
err_stats->msd_Tx_und_int_cnt;
}
/* on the second timer interrupt, read the operational statistics */
else {
if(sdlc_read_op_stats(card))
return 1;
op_stats = (SDLC_OPERATIONAL_STATS_STRUCT *)mb->wan_data;
//FIXME
card->wandev.stats.rx_length_errors =
(op_stats->no_short_frames_Rx +
op_stats->no_short_frames_Rx);
}
return 0;
}
/*============================================================================
* Send packet.
* Return: 0 - o.k.
* 1 - no transmit buffers available
*/
static int sdlc_list_stations_with_ifrms (sdla_t* card)
{
wan_mbox_t *mb = &card->wan_mbox;
int retry=MAX_CMD_RETRY;
int err;
do {
mb->wan_command=LIST_STATIONS_WITH_I_FRMS_AVAILABLE;
mb->wan_return_code=0;
mb->wan_data_len=0;
err = card->hw_iface.cmd(card->hw, card->mbox_off, mb);
if (err){
sdlc_error(card,err,mb);
}
}while (err && --retry);
return err;
}
static int sdlc_read (sdla_t* card,unsigned char station)
{
wan_mbox_t *mb = &card->wan_mbox;
volatile int retry=MAX_CMD_RETRY;
volatile int err;
do {
mb->wan_command=SDLC_READ;
mb->wan_return_code=0;
mb->wan_data_len=0;
mb->wan_sdlc_address=station;
err = card->hw_iface.cmd(card->hw, card->rxmb_off, mb);
if (err){
sdlc_error(card,err,mb);
}
}while (err && --retry);
return err;
}
/*============================================================================
* Send packet.
* Return: 0 - o.k.
* 1 - no transmit buffers available
*/
static int sdlc_send (sdla_t* card, void* data, unsigned len)
{
wan_mbox_t *mb = &card->wan_mbox;
wan_api_t* wan_api;
if (mb->wan_opp_flag){
printk(KERN_INFO "%s: Critical in sdlc_send() opp flag set!",
card->devname);
return 1;
}
wan_api = (wan_api_t*)data;
len -= sizeof(wan_api_hdr_t);
mb->wan_command =SDLC_WRITE;
mb->wan_return_code =0;
mb->wan_data_len = len;
mb->wan_sdlc_address = wan_api->wan_api_sdlc_station;
mb->wan_sdlc_poll_interval = wan_api->wan_api_sdlc_poll_interval;
mb->wan_sdlc_pf = wan_api->wan_api_sdlc_pf;
mb->wan_sdlc_general_mb_byte = wan_api->wan_api_sdlc_general_mb_byte;
memcpy(mb->wan_data,wan_api->data,len);
return card->hw_iface.cmd(card->hw, card->mbox_off, mb);
}
/****** Firmware Error Handler **********************************************/
/*============================================================================
* Firmware error handler.
* This routine is called whenever firmware command returns non-zero
* return code.
*
* Return zero if previous command has to be cancelled.
*/
static int sdlc_error (sdla_t *card, int err, wan_mbox_t *mb)
{
unsigned cmd = mb->wan_command;
switch (err) {
case CMD_TIMEOUT:
printk(KERN_INFO "%s: command 0x%02X timed out!\n",
card->devname, cmd);
break;
case BUSY_WITH_BAUD_CALIBRATION:
/* Do not print here, because we have to wait in
* this contiditon */
break;
case BAUD_CALIBRATION_FAILED:
printk(KERN_INFO "%s: Baud calibration failed!\n",
card->devname);
break;
default:
printk(KERN_INFO "%s: command 0x%02X returned 0x%02X!\n",
card->devname, cmd, err);
}
return 0;
}
/****** Interrupt Handlers **************************************************/
/*============================================================================
* Cisco HDLC interrupt service routine.
*/
static WAN_IRQ_RETVAL wp_sdlc_isr (sdla_t* card)
{
netdevice_t* dev;
INTERRUPT_INFORMATION_STRUCT flags;
dev = WAN_DEVLE2DEV(WAN_LIST_FIRST(&card->wandev.dev_head));
card->in_isr = 1;
card->hw_iface.peek(card->hw, card->flags_off, &flags, sizeof(flags));
/* If we get an interrupt with no network device, stop the interrupts
* and issue an error */
if ((!dev || !dev->priv) && flags.interrupt_type != COMMAND_COMPLETE_INTERRUPT_PENDING){
goto isr_done;
}
/* if critical due to peripheral operations
* ie. update() or getstats() then reset the interrupt and
* wait for the board to retrigger.
*/
if(test_bit(PERI_CRIT, (void*)&card->wandev.critical)) {
goto isr_done;
}
/* On a 508 Card, if critical due to if_send
* Major Error !!!
*/
if(card->type != SDLA_S514) {
if(test_bit(0, (void*)&card->wandev.critical)) {
printk(KERN_INFO "%s: Critical while in ISR: %lx\n",
card->devname, card->wandev.critical);
goto isr_done;
}
}
switch(flags.interrupt_type) {
case RX_INTERRUPT_PENDING: /* 0x01: receive interrupt */
rx_intr(card);
break;
case TX_INTERRUPT_PENDING: /* 0x02: transmit interrupt */
/* Not used, because, tx interrupt
* is not supported by Gideon */
tx_intr(card);
card->hw_iface.clear_bit(card->hw, card->intr_perm_off, INTERRUPT_ON_TX_FRAME);
break;
case COMMAND_COMPLETE_INTERRUPT_PENDING:/* 0x04: cmd cplt */
++ card->timer_int_enabled;
break;
case EXCEPTION_CONDITION_INTERRUPT_PENDING: /* 0x20 */
process_sdlc_exception(card);
break;
case TIMER_INTERRUPT_PENDING:
timer_intr(card);
break;
default:
printk(KERN_INFO "%s: spurious interrupt 0x%02X!\n",
card->devname,
flags.interrupt_type);
break;
}
isr_done:
card->hw_iface.poke_byte(card->hw, card->intr_type_off, 0x00);
card->in_isr = 0;
WAN_IRQ_RETURN(WAN_IRQ_HANDLED);
}
static unsigned char station_list[500];
/*============================================================================
* Receive interrupt handler.
*/
static void rx_intr (sdla_t* card)
{
netdevice_t *dev;
sdlc_private_area_t *chan;
wan_mbox_t *mb = &card->wan_mbox;
wan_mbox_t *rxmb = &card->wan_rxmb;
struct sk_buff *skb;
unsigned len,station_cnt;
unsigned char *buf;
int i,udp_type;
dev = WAN_DEVLE2DEV(WAN_LIST_FIRST(&card->wandev.dev_head));
if (!dev){
goto rx_exit;
}
#if defined(LINUX_2_4)||defined(LINUX_2_6)
if (!netif_running(dev)){
goto rx_exit;
}
#else
if (!dev->start){
goto rx_exit;
}
#endif
chan = dev->priv;
if (sdlc_list_stations_with_ifrms(card) != 0){
goto rx_exit;
}
station_cnt=mb->wan_data_len;
memcpy(&station_list,mb->wan_data,station_cnt);
for (i=0; i < station_cnt; i++){
int err;
err = sdlc_read(card,station_list[i]);
if (err != 0){
DEBUG_EVENT("%s: Receive failed for station %i\n",
card->devname, mb->wan_data[i]);
continue;
}
card->hw_iface.peek(card->hw, card->rxmb_off, rxmb, sizeof(wan_cmd_t));
len=rxmb->wan_data_len;
if (len){
card->hw_iface.peek(card->hw,
card->rxmb_off+offsetof(wan_mbox_t, wan_data),
rxmb->wan_data, len);
}
if (len > card->wandev.mtu){
printk(KERN_INFO "%s: Rx packet too big len %i > MTU %i\n",
card->devname,len,card->wandev.mtu);
continue;
}
/* Allocate socket buffer */
skb = dev_alloc_skb(len+sizeof(wan_api_hdr_t)+2);
if (skb == NULL){
if (net_ratelimit()){
printk(KERN_INFO "%s: no socket buffers available!\n",
card->devname);
}
++card->wandev.stats.rx_dropped;
goto rx_exit;
}
/* Align to 16 byte boundary */
skb_reserve(skb,2);
buf=skb_put(skb,len);
memcpy(buf,rxmb->wan_data,len);
skb->protocol = htons(ETH_P_IP);
card->wandev.stats.rx_packets++;
card->wandev.stats.rx_bytes += skb->len;
udp_type = wan_udp_pkt_type(card,skb->data);
if (chan->common.usedby == API){
wan_api_hdr_t *api_hdr;
skb_push(skb,sizeof(wan_api_hdr_t));
api_hdr = (wan_api_hdr_t*)&skb->data[0];
api_hdr->wan_apihdr_sdlc_station =mb->wan_sdlc_address;
api_hdr->wan_apihdr_sdlc_pf =mb->wan_sdlc_pf;
api_hdr->wan_apihdr_sdlc_poll_interval =mb->wan_sdlc_poll_interval;
api_hdr->wan_apihdr_sdlc_general_mb_byte=mb->wan_sdlc_general_mb_byte;
skb->pkt_type = WAN_PACKET_DATA;
if (chan->common.sk == NULL){
++card->wandev.stats.rx_dropped;
card->wandev.stats.rx_packets --;
card->wandev.stats.rx_bytes -= skb->len;
dev_kfree_skb_any(skb);
continue;
}
if (wan_api_rx(chan,skb) != 0){
++card->wandev.stats.rx_dropped;
card->wandev.stats.rx_packets --;
card->wandev.stats.rx_bytes -= skb->len;
dev_kfree_skb_any(skb);
}
}else if (chan->common.usedby == STACK) {
wan_api_hdr_t *api_hdr;
skb_push(skb,sizeof(wan_api_hdr_t));
api_hdr = (wan_api_hdr_t*)&skb->data[0];
api_hdr->wan_apihdr_sdlc_station=mb->wan_data[i];
skb->pkt_type = WAN_PACKET_DATA;
if (!test_bit(REG_CRIT,&card->wandev.critical) ||
!chan->wp_sdlc_register.sdlc_stack_rx){
++card->wandev.stats.rx_dropped;
card->wandev.stats.rx_packets --;
card->wandev.stats.rx_bytes -= skb->len;
dev_kfree_skb_any(skb);
continue;
}
skb->dev = dev;
wan_skb_reset_mac_header(skb);
if (chan->wp_sdlc_register.sdlc_stack_rx(skb) != 0){
++card->wandev.stats.rx_dropped;
card->wandev.stats.rx_packets --;
card->wandev.stats.rx_bytes -= skb->len;
dev_kfree_skb_any(skb);
}
}else{
/* Pass it up the protocol stack */
skb->dev = dev;
wan_skb_reset_mac_header(skb);
netif_rx(skb);
}
}
rx_exit:
return;
}
static void tx_intr(sdla_t *card)
{
netdevice_t *dev;
sdlc_private_area_t* sdlc_priv_area;
dev = WAN_DEVLE2DEV(WAN_LIST_FIRST(&card->wandev.dev_head));
if (dev == NULL){
return;
}
if ((sdlc_priv_area=dev->priv) == NULL){
return;
}
if (sdlc_priv_area->common.usedby == API){
start_net_queue(dev);
wan_wakeup_api(sdlc_priv_area);
}else{
wake_net_dev(dev);
}
}
/*============================================================================
* Timer interrupt handler.
* The timer interrupt is used for two purposes:
* 1) Processing udp calls from 'cpipemon'.
* 2) Reading board-level statistics for updating the proc file system.
*/
void timer_intr(sdla_t *card)
{
netdevice_t* dev;
sdlc_private_area_t* sdlc_priv_area = NULL;
dev = WAN_DEVLE2DEV(WAN_LIST_FIRST(&card->wandev.dev_head));
if (!dev) return;
sdlc_priv_area = dev->priv;
/* read the communications statistics if required */
if(sdlc_priv_area->timer_int_enabled & TMR_INT_ENABLED_UPDATE){
update_comms_stats(card, sdlc_priv_area);
if (IS_TE1_CARD(card)) {
/* TE1 Update T1/E1 alarms */
card->wandev.fe_iface.read_alarm(&card->fe, 0);
/* TE1 Update T1/E1 perfomance counters */
card->wandev.fe_iface.read_pmon(&card->fe, 0);
}else if (IS_56K_CARD(card)) {
/* 56K Update CSU/DSU alarms */
card->wandev.fe_iface.read_alarm(&card->fe, 1);
}
if(!(-- sdlc_priv_area->update_comms_stats)) {
sdlc_priv_area->timer_int_enabled &=
~TMR_INT_ENABLED_UPDATE;
}
}
/* only disable the timer interrupt if there are no udp or statistic */
/* updates pending */
if(!sdlc_priv_area->timer_int_enabled) {
card->hw_iface.clear_bit(card->hw, card->intr_perm_off, INTERRUPT_ON_TIMER);
}
}
/*------------------------------------------------------------------------------
Miscellaneous Functions
- set_sdlc_config() used to set configuration options on the board
------------------------------------------------------------------------------*/
static int set_sdlc_config(sdla_t* card)
{
SDLC_CONFIGURATION_STRUCT cfg;
memset(&cfg, 0, sizeof(SDLC_CONFIGURATION_STRUCT));
/* Generate an interrupt on an exception condition,
* do not give it to me on a command */
cfg.general_operational_config_bits |= APP_REQUESTS_PASSING_EXCEPT_COND;
if(card->wandev.clocking){
cfg.baud_rate = card->wandev.bps;
}
/* the station configuration (primary or secondary) */
cfg.station_configuration=card->wandev.sdlc_cfg.station_configuration;
/* the maximum permitted Information field length supported */
if (card->wandev.sdlc_cfg.max_I_field_length){
cfg.max_I_field_length = card->wandev.mtu = card->wandev.sdlc_cfg.max_I_field_length;
}else{
cfg.max_I_field_length = card->wandev.mtu;
}
cfg.general_operational_config_bits=card->wandev.sdlc_cfg.general_operational_config_bits;
if (card->wandev.interface != WANOPT_RS232){
cfg.general_operational_config_bits |= INTERFACE_LEVEL_V35;
}
/* miscellaneous protocol configuration bits */
cfg.protocol_config_bits=card->wandev.sdlc_cfg.protocol_config_bits;
/* bits to specify which exception conditions are reported to the application */
cfg.exception_condition_reporting_config=card->wandev.sdlc_cfg.exception_condition_reporting_config;
/* modem operation configuration bits */
cfg.modem_config_bits=card->wandev.sdlc_cfg.modem_config_bits;
/* the statistics format byte */
cfg.statistics_format=card->wandev.sdlc_cfg.statistics_format;
/* the slow poll interval for a primary station (milliseconds) */
cfg.pri_station_slow_poll_interval=card->wandev.sdlc_cfg.pri_station_slow_poll_interval;
/* the permitted secondary station_response timeout (milliseconds) */
cfg.permitted_sec_station_response_TO=card->wandev.sdlc_cfg.permitted_sec_station_response_TO;
/* the number of consecutive secondary timeouts while */
/* in the NRM before a SNRM is issued */
cfg.no_consec_sec_TOs_in_NRM_before_SNRM_issued=card->wandev.sdlc_cfg.no_consec_sec_TOs_in_NRM_before_SNRM_issued;
/* the maximum Information field length permitted in an XID */
/* frame sent by a primary station */
cfg.max_lgth_I_fld_pri_XID_frame=card->wandev.sdlc_cfg.max_lgth_I_fld_pri_XID_frame;
/* the additional bit delay before transmitting the opening */
/* character in a frame */
cfg.opening_flag_bit_delay_count=card->wandev.sdlc_cfg.opening_flag_bit_delay_count;
/* the additional bit delay before dropping RTS */
cfg.RTS_bit_delay_count=card->wandev.sdlc_cfg.RTS_bit_delay_count;
/* the permitted CTS timeout for switched CTS/RTS configurations */
/* (in 1000ths/second) */
cfg.CTS_timeout_1000ths_sec=card->wandev.sdlc_cfg.CTS_timeout_1000ths_sec;
/* the adapter type and the CPU speed */
cfg.SDLA_configuration=card->wandev.sdlc_cfg.SDLA_configuration;
DEBUG_EVENT("\n");
DEBUG_EVENT("%s: SDLC Config:\n",card->devname);
DEBUG_EVENT("%s: Station Cfg : 0x%X\n",
card->devname,cfg.station_configuration);
DEBUG_EVENT("%s: Baud Rate : 0x%lX\n",
card->devname,cfg.baud_rate);
DEBUG_EVENT("%s: Max I Frame Len : %i\n",
card->devname,cfg.max_I_field_length);
DEBUG_EVENT("%s: Misc Oper. Cfg : 0x%X\n",
card->devname,cfg.general_operational_config_bits);
DEBUG_EVENT("%s: Misc Protocol Cfg : 0x%X\n",
card->devname,cfg.protocol_config_bits);
DEBUG_EVENT("%s: Exception Reporting : 0x%X\n",
card->devname,cfg.exception_condition_reporting_config);
DEBUG_EVENT("%s: Modem Op Cfg : 0x%X\n",
card->devname,cfg.modem_config_bits);
DEBUG_EVENT("%s: Statistics Format : 0x%X\n",
card->devname,cfg.statistics_format);
DEBUG_EVENT("%s: Slow poll Inter Pri : %i\n",
card->devname,cfg.pri_station_slow_poll_interval);
DEBUG_EVENT("%s: Sec Station Resp : %i\n",
card->devname,cfg.permitted_sec_station_response_TO);
DEBUG_EVENT("%s: No Tout NRM b4 SNRM : %i\n",
card->devname,cfg.no_consec_sec_TOs_in_NRM_before_SNRM_issued);
DEBUG_EVENT("%s: Max I Frm in XID Pri : %i\n",
card->devname,cfg.max_lgth_I_fld_pri_XID_frame);
DEBUG_EVENT("%s: Bit delay b4 Tx Ch : %i\n",
card->devname,cfg.opening_flag_bit_delay_count);
DEBUG_EVENT("%s: Bit delay b4 drop RTS : %i\n",
card->devname,cfg.RTS_bit_delay_count);
DEBUG_EVENT("%s: CTS Timeout Sw CTS/RTS: %i\n",
card->devname,cfg.CTS_timeout_1000ths_sec);
DEBUG_EVENT("%s: Adapter Type CPU Speed: 0x%X\n",
card->devname,cfg.SDLA_configuration);
DEBUG_EVENT("\n");
return sdlc_configure(card, &cfg);
}
static void sdlc_modem_change(sdla_t *card, wan_mbox_t *mb)
{
#if 0
if (IS_56K_CARD(card)) {
INTERRUPT_INFORMATION_STRUCT *flags = card->u.sdlc.flags;
FRONT_END_STATUS_STRUCT *FE_status =
(FRONT_END_STATUS_STRUCT *)&flags->FT1_info_struct.parallel_port_A_input;
card->wandev.RR8_reg_56k =
FE_status->FE_U.stat_56k.RR8_56k;
card->wandev.RRA_reg_56k =
FE_status->FE_U.stat_56k.RRA_56k;
card->wandev.RRC_reg_56k =
FE_status->FE_U.stat_56k.RRC_56k;
card->wandev.fe_iface.read_alarm(&card->fe, 0);
return;
}
if (IS_TE1_CARD(card)) {
/* TE_INTR */
card->wandev.fe_iface.isr(&card->fe);
return;
}
#endif
printk(KERN_INFO "%s: Modem status change\n",
card->devname);
switch(mb->wan_data[0] & (DCD_HIGH | CTS_HIGH)) {
case (DCD_HIGH):
printk(KERN_INFO "%s: DCD high, CTS low\n",card->devname);
break;
case (CTS_HIGH):
printk(KERN_INFO "%s: DCD low, CTS high\n",card->devname);
break;
case ((DCD_HIGH | CTS_HIGH)):
printk(KERN_INFO "%s: DCD high, CTS high\n",card->devname);
break;
default:
printk(KERN_INFO "%s: DCD low, CTS low\n",card->devname);
break;
}
return;
}
static void sdlc_state_change(sdla_t *card, wan_mbox_t *mb)
{
int i;
netdevice_t *dev;
sdlc_private_area_t *sdlc_chan;
SDLC_STATE_STRUCT *sdlc_state=(SDLC_STATE_STRUCT *)mb->wan_data;
dev = WAN_DEVLE2DEV(WAN_LIST_FIRST(&card->wandev.dev_head));
if (!dev)
return;
if ((sdlc_chan=dev->priv) == NULL)
return;
for (i=0;i<mb->wan_data_len;i+=sizeof(SDLC_STATE_STRUCT)){
printk(KERN_INFO "%s: Station %X State = %s\n",
card->devname,
sdlc_state->station,
sdlc_state->state?"Connected (NRM)":"Disconnected (NDM)");
sdlc_state++;
}
if (sdlc_chan->common.usedby != WANPIPE){
send_oob_msg(card,mb);
}
return;
}
/*============================================================================
* Process chdlc exception condition
*/
static int process_sdlc_exception(sdla_t *card)
{
wan_mbox_t* mb = &card->wan_mbox;
int err;
mb->wan_data_len = 0;
mb->wan_command = READ_EXCEPTION_CONDITION;
err = card->hw_iface.cmd(card->hw, card->mbox_off, mb);
if(err != CMD_TIMEOUT) {
switch (err) {
case EXCEP_COND_STATE_CHANGE:
/* the SDLC station changed state */
sdlc_state_change(card,mb);
break;
case EXCEP_COND_TIMEOUT_NRM:
/* a timeout occurred while the stations was in the NRM */
break;
case EXCEP_COND_RD_FRM_RX_WHILE_IN_NRM:
/* a RD was received while the link was in the NRM */
break;
case EXCEP_COND_DM_FRM_RX_WHILE_IN_NRM:
/* a DM was received while the link was in the NRM */
break;
case EXCEP_COND_SNRM_FRM_RX_WHILE_IN_NRM:
/* a SNRM was received while the link was in the NRM */
break;
case EXCEP_COND_RIM_FRM_RX:
/* a RIM was received */
break;
case EXCEP_COND_XID_FRM_RX:
/* an XID frame was received */
break;
case EXCEP_COND_TEST_FRM_RX:
/* a TEST frame was received */
break;
case EXCEP_COND_FRMR_FRM_RX_TX:
/* a FRMR condition occurred */
break;
case EXCEP_COND_CHANGE_IN_MODEM_STATUS:
/* a modem status change occurred */
sdlc_modem_change(card,mb);
break;
default:
printk(KERN_INFO "%s: Exception Condition %x!\n",
card->devname,err);
break;
}
}
return 0;
}
/*=============================================================================
* Process UDP management packet.
*/
static int process_udp_mgmt_pkt(sdla_t* card, netdevice_t* dev,
sdlc_private_area_t* sdlc_priv_area,int local_dev)
{
unsigned char *buf;
unsigned int len;
struct sk_buff *new_skb;
int udp_mgmt_req_valid = 1;
wan_mbox_t *mb = &card->wan_mbox;
wan_udp_pkt_t *wan_udp_pkt;
struct timeval tv;
int err;
wan_udp_pkt = (wan_udp_pkt_t *) sdlc_priv_area->udp_pkt_data;
if(sdlc_priv_area->udp_pkt_src == UDP_PKT_FRM_NETWORK) {
switch(wan_udp_pkt->wan_udp_command) {
case READ_MODEM_STATUS:
case READ_STATION_STATUS:
case CPIPE_ROUTER_UP_TIME:
case READ_COMMS_ERR_STATISTICS:
case READ_OPERATIONAL_STATISTICS:
/* These two commands are executed for
* each request */
case READ_SDLC_CONFIGURATION:
case READ_CODE_VERSION:
udp_mgmt_req_valid = 1;
break;
default:
udp_mgmt_req_valid = 0;
break;
}
}
if(!udp_mgmt_req_valid) {
/* set length to 0 */
wan_udp_pkt->wan_udp_data_len = 0;
/* set return code */
wan_udp_pkt->wan_udp_return_code = 0xCD;
if (net_ratelimit()){
printk(KERN_INFO
"%s: Warning, Illegal UDP command attempted from network: %x\n",
card->devname,wan_udp_pkt->wan_udp_command);
}
} else {
switch(wan_udp_pkt->wan_udp_command) {
case CPIPE_ROUTER_UP_TIME:
do_gettimeofday( &tv );
sdlc_priv_area->router_up_time = tv.tv_sec -
sdlc_priv_area->router_start_time;
*(unsigned long *)&wan_udp_pkt->wan_udp_data =
sdlc_priv_area->router_up_time;
mb->wan_data_len = sizeof(unsigned long);
wan_udp_pkt->wan_udp_return_code = COMMAND_OK;
break;
default:
/* it's a board command */
mb->wan_command = wan_udp_pkt->wan_udp_command;
mb->wan_data_len = wan_udp_pkt->wan_udp_data_len;
if (mb->wan_data_len) {
memcpy(&mb->wan_data, (unsigned char *) wan_udp_pkt->
wan_udp_data, mb->wan_data_len);
}
/* run the command on the board */
err = card->hw_iface.cmd(card->hw, card->mbox_off, mb);
if (err != COMMAND_OK) {
break;
}
/* copy the result back to our buffer */
memcpy(&wan_udp_pkt->wan_udp_hdr.wan_cmd, mb, sizeof(wan_cmd_t));
if (mb->wan_data_len) {
memcpy(&wan_udp_pkt->wan_udp_data, &mb->wan_data,
mb->wan_data_len);
}
} /* end of switch */
} /* end of else */
/* Fill UDP TTL */
wan_udp_pkt->wan_ip_ttl = card->wandev.ttl;
if (local_dev){
}
len = wan_reply_udp(card, sdlc_priv_area->udp_pkt_data, mb->wan_data_len);
if(sdlc_priv_area->udp_pkt_src == UDP_PKT_FRM_NETWORK) {
if(!sdlc_send(card, sdlc_priv_area->udp_pkt_data, len)) {
++ card->wandev.stats.tx_packets;
card->wandev.stats.tx_bytes += len;
}
} else {
/* Pass it up the stack
Allocate socket buffer */
if ((new_skb = dev_alloc_skb(len)) != NULL) {
/* copy data into new_skb */
buf = skb_put(new_skb, len);
memcpy(buf, sdlc_priv_area->udp_pkt_data, len);
/* Decapsulate pkt and pass it up the protocol stack */
new_skb->protocol = htons(ETH_P_IP);
new_skb->dev = dev;
wan_skb_reset_mac_header(new_skb);
netif_rx(new_skb);
} else {
printk(KERN_INFO "%s: no socket buffers available!\n",
card->devname);
}
}
sdlc_priv_area->udp_pkt_lgth = 0;
return 0;
}
/*=============================================================================
* Perform Interrupt Test by running READ_CHDLC_CODE_VERSION command MAX_INTR
* _TEST_COUNTER times.
*/
static int intr_test( sdla_t* card)
{
wan_mbox_t* mb = &card->wan_mbox;
int err,i;
card->timer_int_enabled = 0;
/* The critical flag is unset because during intialization (if_open)
* we want the interrupts to be enabled so that when the wpc_isr is
* called it does not exit due to critical flag set.
*/
err = sdlc_set_intr_mode(card, INTERRUPT_ON_COMMAND_COMPLETE);
if (err == CMD_OK) {
for (i = 0; i < MAX_INTR_TEST_COUNTER; i ++) {
mb->wan_data_len = 0;
mb->wan_command = READ_CODE_VERSION;
err = card->hw_iface.cmd(card->hw, card->mbox_off, mb);
}
}
else {
return err;
}
err = sdlc_set_intr_mode(card, 0);
if (err != CMD_OK)
return err;
return 0;
}
/*============================================================================
* Set PORT state.
*/
static void port_set_state (sdla_t *card, int state)
{
netdevice_t *dev;
sdlc_private_area_t *sdlc_priv_area;
dev = WAN_DEVLE2DEV(WAN_LIST_FIRST(&card->wandev.dev_head));
if (!dev || !dev->priv){
return;
}
sdlc_priv_area=dev->priv;
if (card->u.sdlc.state != state)
{
switch (state)
{
case WAN_CONNECTED:
printk (KERN_INFO "%s: SDLC comms enabled!\n",
card->devname);
break;
case WAN_CONNECTING:
printk (KERN_INFO "%s: SDLC comms disabled!\n",
card->devname);
break;
case WAN_DISCONNECTED:
printk (KERN_INFO "%s: SDLC comms disabled!\n",
card->devname);
break;
}
card->wandev.state = card->u.sdlc.state = state;
sdlc_priv_area->common.state = state;
wan_update_api_state(sdlc_priv_area);
}
}
/*===========================================================================
* config_sdlc
*
* Configure the chdlc protocol and enable communications.
*
* The if_open() function binds this function to the poll routine.
* Therefore, this function will run every time the chdlc interface
* is brought up. We cannot run this function from the if_open
* because if_open does not have access to the remote IP address.
*
* If the communications are not enabled, proceed to configure
* the card and enable communications.
*
* If the communications are enabled, it means that the interface
* was shutdown by ether the user or driver. In this case, we
* have to check that the IP addresses have not changed. If
* the IP addresses have changed, we have to reconfigure the firmware
* and update the changed IP addresses. Otherwise, just exit.
*
*/
static int config_sdlc (sdla_t *card)
{
wan_mbox_t *mb=&card->wan_mbox;
unsigned long timeout;
int err=0;
/* Set interrupt mode and mask */
if (sdlc_set_intr_mode(card, INTERRUPT_ON_RX_FRAME |
INTERRUPT_ON_EXCEPTION_CONDITION |
INTERRUPT_ON_TIMER)){
printk (KERN_INFO "%s: Failed to set interrupt triggers!\n",
card->devname);
return -EINVAL;
}
/* Mask the Transmit and Timer interrupt */
card->hw_iface.clear_bit(card->hw, card->intr_perm_off, (INTERRUPT_ON_TIMER));
timeout=jiffies;
while ((jiffies-timeout) < 2*HZ){
err = sdlc_comm_enable(card);
if (err == BUSY_WITH_BAUD_CALIBRATION){
udelay(100);
schedule();
continue;
}else{
break;
}
}
if (err !=0){
printk(KERN_INFO "%s: Failed to enable sdlc communications!\n",
card->devname);
card->hw_iface.poke_byte(card->hw, card->intr_perm_off, 0x00);
card->u.sdlc.comm_enabled=0;
sdlc_set_intr_mode(card,0);
return -EINVAL;
}
err = sdlc_read_config(card);
if (err==0){
SDLC_CONFIGURATION_STRUCT *sdla_cfg =
(SDLC_CONFIGURATION_STRUCT *)mb->wan_data;
printk(KERN_INFO "%s: Baud rate calibrated at %li bps\n",
card->devname,sdla_cfg->baud_rate);
}else{
printk(KERN_INFO "%s: Failed to read configuration!\n",
card->devname);
card->hw_iface.poke_byte(card->hw, card->intr_perm_off, 0x00);
sdlc_set_intr_mode(card,0);
sdlc_comm_disable(card);
return -EINVAL;
}
return 0;
}
/*
* ******************************************************************
* Proc FS function
*/
#define PROC_CFG_FRM "%-15s| %-12s|\n"
#define PROC_STAT_FRM "%-15s| %-12s| %-14s|\n"
static char chdlc_config_hdr[] =
"Interface name | Device name |\n";
static char chdlc_status_hdr[] =
"Interface name | Device name | Status |\n";
static int chdlc_get_config_info(void* priv, struct seq_file* m, int* stop_cnt)
{
sdlc_private_area_t* sdlc_priv_area = priv;
sdla_t* card = NULL;
if (sdlc_priv_area == NULL)
return m->count;
card = sdlc_priv_area->card;
if ((m->from == 0 && m->count == 0) || (m->from && m->from == *stop_cnt)){
PROC_ADD_LINE(m,
"%s", chdlc_config_hdr);
}
PROC_ADD_LINE(m,
PROC_CFG_FRM, card->u.sdlc.if_name, card->devname);
return m->count;
}
static int chdlc_get_status_info(void* priv, struct seq_file* m, int* stop_cnt)
{
sdlc_private_area_t* sdlc_priv_area = priv;
sdla_t* card = NULL;
if (sdlc_priv_area == NULL)
return m->count;
card = sdlc_priv_area->card;
if ((m->from == 0 && m->count == 0) || (m->from && m->from == *stop_cnt)){
PROC_ADD_LINE(m,
"%s", chdlc_status_hdr);
}
PROC_ADD_LINE(m,
PROC_STAT_FRM,
card->u.sdlc.if_name, card->devname, STATE_DECODE(sdlc_priv_area->common.state));
return m->count;
}
#define PROC_DEV_FR_S_FRM "%-20s| %-14s|\n"
#define PROC_DEV_FR_D_FRM "%-20s| %-14d|\n"
#define PROC_DEV_SEPARATE "=====================================\n"
static int chdlc_set_dev_config(struct file *file,
const char *buffer,
unsigned long count,
void *data)
{
int cnt = 0;
wan_device_t* wandev = (void*)data;
sdla_t* card = NULL;
if (wandev == NULL)
return cnt;
card = (sdla_t*)wandev->private;
printk(KERN_INFO "%s: New device config (%s)\n",
wandev->name, buffer);
/* Parse string */
return count;
}
#define PROC_IF_FR_S_FRM "%-30s\t%-14s\n"
#define PROC_IF_FR_D_FRM "%-30s\t%-14d\n"
#define PROC_IF_FR_L_FRM "%-30s\t%-14ld\n"
#define PROC_IF_SEPARATE "====================================================\n"
static int chdlc_set_if_info(struct file *file,
const char *buffer,
unsigned long count,
void *data)
{
netdevice_t* dev = (void*)data;
sdlc_private_area_t* sdlc_priv_area = NULL;
sdla_t* card = NULL;
if (dev == NULL || dev->priv == NULL)
return count;
sdlc_priv_area = (sdlc_private_area_t*)dev->priv;
if (sdlc_priv_area->card == NULL)
return count;
card = sdlc_priv_area->card;
printk(KERN_INFO "%s: New interface config (%s)\n",
card->u.sdlc.if_name, buffer);
/* Parse string */
return count;
}
int wanpipe_sdlc_register(netdevice_t *dev, void *reg_data)
{
netdevice_t *dev1;
wp_sdlc_reg_t *wp_sdlc_reg = (wp_sdlc_reg_t *)reg_data;
sdlc_private_area_t *chan;
sdla_t *card=NULL;
if (!dev || !wp_sdlc_reg){
return -ENODEV;
}
if (dev->type != ARPHRD_SDLC){
printk(KERN_INFO "%s: Device %s type not SDLC! type=%i\n",
card->devname,dev->name,dev->type);
return -EINVAL;
}
if ((chan=dev->priv) == NULL){
return -ENODEV;
}
if ((card=chan->card) == NULL){
return -ENODEV;
}
dev1 = WAN_DEVLE2DEV(WAN_LIST_FIRST(&card->wandev.dev_head));
if (dev != dev1){
return -EINVAL;
}
if (chan->common.usedby != STACK){
printk(KERN_INFO "%s: Device %s doesn't support registration!\n",
card->devname,dev->name);
return -EINVAL;
}
if (test_bit(REG_CRIT,&card->wandev.critical)){
printk(KERN_INFO "%s: Device %s already registered!\n",
card->devname,dev->name);
return -EBUSY;
}
memcpy(&chan->wp_sdlc_register,wp_sdlc_reg,sizeof(wp_sdlc_reg_t));
set_bit(REG_CRIT,&card->wandev.critical);
printk(KERN_INFO "%s: Registering sdlc device %s \n",
card->devname,dev->name);
return 0;
}
int wanpipe_sdlc_unregister(netdevice_t *dev)
{
netdevice_t *dev1;
sdlc_private_area_t *chan;
sdla_t *card;
if (!dev){
return -ENODEV;
}
if ((chan=dev->priv) == NULL){
return -ENODEV;
}
if ((card=chan->card) == NULL){
return -ENODEV;
}
dev1 = WAN_DEVLE2DEV(WAN_LIST_FIRST(&card->wandev.dev_head));
if (dev != dev1){
return -EINVAL;
}
if (chan->common.usedby != STACK){
printk(KERN_INFO "%s: Device %s doesn't support un-registration!\n",
card->devname,dev->name);
return -EINVAL;
}
if (test_bit(REG_CRIT,&card->wandev.critical)){
clear_bit(REG_CRIT,&card->wandev.critical);
printk(KERN_INFO "%s: Unregistering sdlc device %s \n",
card->devname,dev->name);
}
return 0;
}
void send_oob_msg(sdla_t *card, wan_mbox_t *mb)
{
struct sk_buff *skb;
netdevice_t *dev;
sdlc_private_area_t *chan;
wan_api_t *wan_api;
dev = WAN_DEVLE2DEV(WAN_LIST_FIRST(&card->wandev.dev_head));
if (!dev || !wan_netif_priv(dev))
return;
chan = wan_netif_priv(dev);
if (chan->common.usedby == WANPIPE){
return;
}
skb=dev_alloc_skb(sizeof(wan_api_hdr_t)+mb->wan_data_len+10);
if (!skb){
printk(KERN_INFO "%s: OOB msg failed: faild to allocate skb!\n",
card->devname);
return;
}
wan_api=(wan_api_t *)skb_put(skb,sizeof(wan_api_hdr_t)+mb->wan_data_len);
wan_api->wan_api_pktType = mb->wan_command;
wan_api->wan_api_length=mb->wan_data_len;
wan_api->wan_api_sdlc_station = 0;
memcpy(wan_api->data,mb->wan_data,mb->wan_data_len);
skb->dev=dev;
skb->pkt_type = WAN_PACKET_CMD;
if (chan->common.usedby == API){
if (chan->common.sk == NULL){
++card->wandev.stats.rx_dropped;
dev_kfree_skb_any(skb);
}
if (wan_api_rx(chan,skb) != 0){
++card->wandev.stats.rx_dropped;
dev_kfree_skb_any(skb);
}
}else if (chan->common.usedby == STACK) {
if (!test_bit(REG_CRIT,&card->wandev.critical) ||
!chan->wp_sdlc_register.sdlc_stack_rx){
++card->wandev.stats.rx_dropped;
dev_kfree_skb_any(skb);
}
skb->dev = dev;
wan_skb_reset_mac_header(skb);
if (chan->wp_sdlc_register.sdlc_stack_rx(skb) != 0){
++card->wandev.stats.rx_dropped;
dev_kfree_skb_any(skb);
}
}
}
/****** End ****************************************************************/
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