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

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/*****************************************************************************
* wanpipe_multppp.c Multi-Port PPP driver module.
*
* Authors: Nenad Corbic <ncorbic@sangoma.com>
*
* Copyright: (c) 1995-2001 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.
* ============================================================================
* Apr 12, 2003 Nenad Corbic Added MPAPI Annexg Support as well as the
* new tracing package.
* Mar 26, 2003 David Rokhvarg Added PAP and CHAP support. Only as a peer,
* not an authenticator.
* Sep 20, 2001 Nenad Corbic The min() function has changed for 2.4.9
* kernel. Thus using the wp_min() defined in
* wanpipe.h
* May 29 2001 Nenad Corbic Added T1/E1 support (TE1).
* Apr 15 2001 Nenad Corbic Bug Fix (2.2.X kernel) Driver
* crashed on shutdown while mrouted
* was running. The dev->do_ioctl call
* was still bound to syncppp after
* syncpp_detach().
* Dec 15 2000 Nenad Corbic Updated for 2.4.X kernel
* Nov 15 2000 Nenad Corbic Fixed the SyncPPP support for
* kernels 2.2.16 and higher.
* The pppstruct has changed.
* Jul 13 2000 Nenad Corbic Using the kernel Syncppp module on
* top of RAW Wanpipe CHDLC module.
*****************************************************************************/
#include <linux/wanpipe_includes.h>
#include <linux/wanpipe_defines.h>
#include <linux/wanpipe_debug.h>
#include <linux/wanpipe_abstr.h>
#include <linux/wanpipe_common.h>
#include <linux/wanrouter.h> /* WAN router definitions */
#include <linux/wanpipe.h> /* WANPIPE common user API definitions */
#include <linux/sdlapci.h>
#include <linux/wanproc.h>
#include <linux/sdla_chdlc.h> /* CHDLC firmware API definitions */
#include <linux/sdla_asy.h> /* CHDLC (async) API definitions */
#include <linux/if_wanpipe_common.h> /* Socket Driver common area */
#include <linux/if_wanpipe.h>
#include <linux/wanpipe_syncppp.h>
#ifdef CONFIG_PRODUCT_WANPIPE_ANNEXG
# include "wanpipe_lapb_kernel.h"
#endif
/****** Defines & Macros ****************************************************/
#ifdef _DEBUG_
#define STATIC
#else
#define STATIC static
#endif
/* reasons for enabling the timer interrupt on the adapter */
#define TMR_INT_ENABLED_UDP 0x01
#define TMR_INT_ENABLED_UPDATE 0x02
#define TMR_INT_ENABLED_CONFIG 0x04
#define TMR_INT_ENABLED_TE 0x20
#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_QUEUE 100
#define MAX_TRACE_BUFFER WAN_MAX_DATA_SIZE
#define MAX_RX_QUEUE 100
/******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 private_area
{
wanpipe_common_t common;
sdla_t *card;
netdevice_t *dev;
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;
unsigned char mc; /* Mulitcast support on/off */
char update_comms_stats; /* updating comms stats */
/* Entry in proc fs per each interface */
struct proc_dir_entry* dent;
unsigned char ignore_modem;
char udp_pkt_src;
unsigned char udp_pkt_data[sizeof(wan_udp_pkt_t)+10];
atomic_t udp_pkt_len;
wan_trace_t trace_info;
wan_tasklet_t tasklet;
wan_skb_queue_t rx_queue;
char if_name[WAN_IFNAME_SZ+1];
netdevice_t *annexg_dev;
unsigned char label[WAN_IF_LABEL_SZ+1];
unsigned char prev_error;
} private_area_t;
/* Route Status options */
#define NO_ROUTE 0x00
#define ADD_ROUTE 0x01
#define ROUTE_ADDED 0x02
#define REMOVE_ROUTE 0x03
/* variable for keeping track of enabling/disabling FT1 monitor status */
static int rCount = 0;
/* variable for tracking how many interfaces to open for WANPIPE on the
two ports */
extern void disable_irq(unsigned int);
extern void enable_irq(unsigned int);
/****** 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);
static void if_tx_timeout (netdevice_t *dev);
/* CHDLC Firmware interface functions */
static int chdlc_configure (sdla_t* card, void* data);
static int chdlc_comm_enable (sdla_t* card);
static int chdlc_comm_disable (sdla_t* card);
static int chdlc_read_version (sdla_t* card, char* str);
static int chdlc_set_intr_mode (sdla_t* card, unsigned mode);
static int set_adapter_config (sdla_t* card);
static int chdlc_send (sdla_t* card, void* data, unsigned len);
static int chdlc_read_comm_err_stats (sdla_t* card);
static int chdlc_read_op_stats (sdla_t* card);
static int config_chdlc (sdla_t *card);
/* Miscellaneous CHDLC Functions */
static int set_chdlc_config (sdla_t* card);
static int set_asy_config(sdla_t* card);
static int asy_comm_enable (sdla_t* card);
static void init_chdlc_tx_rx_buff( sdla_t* card, netdevice_t *dev );
static int chdlc_error (sdla_t *card, int err, wan_mbox_t *mb);
static int process_chdlc_exception(sdla_t *card);
static int process_global_exception(sdla_t *card);
static int update_comms_stats(sdla_t* card,
private_area_t* chan);
static void port_set_state (sdla_t *card, int);
/* Interrupt handlers */
static WAN_IRQ_RETVAL wsppp_isr (sdla_t* card);
static void rx_intr (sdla_t* card);
static void timer_intr(sdla_t *);
/* Miscellaneous functions */
static int intr_test( sdla_t* card);
static int udp_pkt_type( struct sk_buff *skb , sdla_t* card);
static int store_udp_mgmt_pkt(char udp_pkt_src, sdla_t* card,
struct sk_buff *skb, netdevice_t* dev,
private_area_t* chan);
static int process_udp_mgmt_pkt(sdla_t* card, netdevice_t* dev,
private_area_t* chan,int local_dev);
static void s508_lock (sdla_t *card, unsigned long *smp_flags);
static void s508_unlock (sdla_t *card, unsigned long *smp_flags);
static void send_ppp_term_request (netdevice_t*);
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 *);
static int if_do_ioctl(netdevice_t *dev, struct ifreq *ifr, int cmd);
static void chdlc_enable_timer (void* card_id);
static void wp_bh (unsigned long data);
#ifdef CONFIG_PRODUCT_WANPIPE_ANNEXG
static int bind_annexg(netdevice_t *dev, netdevice_t *annexg_dev);
static netdevice_t * un_bind_annexg(wan_device_t *wandev, netdevice_t* annexg_dev_name);
static int get_map(wan_device_t*, netdevice_t*, struct seq_file* m, int*);
static void get_active_inactive(wan_device_t *wandev, netdevice_t *dev,
void *wp_stats);
#endif
static int digital_loop_test(sdla_t* card,wan_udp_pkt_t* wan_udp_pkt);
/* TE1 */
static WRITE_FRONT_END_REG_T write_front_end_reg;
static READ_FRONT_END_REG_T read_front_end_reg;
static void handle_front_end_state(void* card_id);
/****** 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_mprot_init (sdla_t* card, wandev_conf_t* conf)
{
unsigned char port_num;
int err;
u_int32_t max_permitted_baud = 0;
union
{
char str[80];
} u;
volatile wan_mbox_t* mb;
wan_mbox_t* mb1;
unsigned long timeout;
/* Verify configuration ID */
if (conf->config_id != WANCONFIG_MPPP) {
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) || (conf->comm_port == WANOPT_SEC)){
if (card->next){
if (conf->comm_port != card->next->u.c.comm_port){
card->u.c.comm_port = conf->comm_port;
}else{
printk(KERN_INFO "%s: ERROR - %s port used!\n",
card->wandev.name, PORT(conf->comm_port));
return -EINVAL;
}
}else{
card->u.c.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 */
if (card->u.c.comm_port == WANOPT_PRI){
card->mbox_off = PRI_BASE_ADDR_MB_STRUCT;
}else{
card->mbox_off = SEC_BASE_ADDR_MB_STRUCT;
}
mb = &card->wan_mbox;
mb1 = &card->wan_mbox;
if (!card->configured){
unsigned char return_code;
/* The board will place an 'I' in the return code to indicate that it is
ready to accept commands. We expect this to be completed in less
than 1 second. */
timeout = jiffies;
/* Wait 1s for board to initialize */
do {
return_code = 0x00;
card->hw_iface.peek(card->hw,
card->mbox_off+offsetof(wan_mbox_t, wan_return_code),
&return_code,
sizeof(unsigned char));
if ((jiffies - timeout) > 1*HZ) break;
}while(return_code != 'I');
if (return_code != 'I') {
printk(KERN_INFO
"%s: Initialization not completed by adapter\n",
card->devname);
printk(KERN_INFO "Please contact Sangoma representative.\n");
return -EIO;
}
}
err = (card->hw_iface.check_mismatch) ?
card->hw_iface.check_mismatch(card->hw,conf->fe_cfg.media) : -EINVAL;
if (err){
return err;
}
/* TE1 Make special hardware initialization for T1/E1 board */
if (IS_TE1_MEDIA(&conf->fe_cfg)){
memcpy(&card->fe.fe_cfg, &conf->fe_cfg, sizeof(sdla_fe_cfg_t));
sdla_te_iface_init(&card->wandev.fe_iface);
card->fe.name = card->devname;
card->fe.card = card;
card->fe.write_fe_reg = write_front_end_reg;
card->fe.read_fe_reg = read_front_end_reg;
card->wandev.fe_enable_timer = chdlc_enable_timer;
card->wandev.te_link_state = handle_front_end_state;
conf->interface =
(IS_T1_CARD(card)) ? WANOPT_V35 : WANOPT_RS232;
if (card->u.c.comm_port == WANOPT_PRI){
conf->clocking = WANOPT_EXTERNAL;
}
}else if (IS_56K_MEDIA(&conf->fe_cfg)){
memcpy(&card->fe.fe_cfg, &conf->fe_cfg, sizeof(sdla_fe_cfg_t));
sdla_56k_iface_init(&card->wandev.fe_iface);
card->fe.name = card->devname;
card->fe.card = card;
card->fe.write_fe_reg = write_front_end_reg;
card->fe.read_fe_reg = read_front_end_reg;
}else{
card->fe.fe_status = FE_CONNECTED;
}
card->wandev.ignore_front_end_status = conf->ignore_front_end_status;
if (card->wandev.ignore_front_end_status == WANOPT_NO){
printk(KERN_INFO
"%s: Enabling front end link monitor\n",
card->devname);
}else{
printk(KERN_INFO
"%s: Disabling front end link monitor\n",
card->devname);
}
/* Read firmware version. Note that when adapter initializes, it
* clears the mailbox, so it may appear that the first command was
* executed successfully when in fact it was merely erased. To work
* around this, we execute the first command twice.
*/
if (chdlc_read_version(card, u.str))
return -EIO;
printk(KERN_INFO "%s: Running Raw HDLC firmware v%s\n"
"%s: for Multi-Port protocol.\n",
card->devname,u.str,card->devname);
if (set_adapter_config(card)) {
return -EIO;
}
card->isr = &wsppp_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;
#ifdef CONFIG_PRODUCT_WANPIPE_ANNEXG
card->wandev.bind_annexg = &bind_annexg;
card->wandev.un_bind_annexg = &un_bind_annexg;
card->wandev.get_map = &get_map;
card->wandev.get_active_inactive= &get_active_inactive;
#endif
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;
/* reset the number of times the 'update()' proc has been called */
card->u.c.update_call_count = 0;
card->wandev.ttl = conf->ttl;
card->wandev.interface = conf->interface;
if ((card->u.c.comm_port == WANOPT_SEC && conf->interface == WANOPT_V35)&&
card->type != SDLA_S514){
printk(KERN_INFO "%s: ERROR - V35 Interface not supported on S508 %s port \n",
card->devname, PORT(card->u.c.comm_port));
return -EIO;
}
card->wandev.clocking = conf->clocking;
port_num = card->u.c.comm_port;
/* Setup Port Bps */
if(card->wandev.clocking) {
if((port_num == WANOPT_PRI) || card->u.c.receive_only) {
/* For Primary Port 0 */
max_permitted_baud =
(card->type == SDLA_S514) ?
PRI_MAX_BAUD_RATE_S514 :
PRI_MAX_BAUD_RATE_S508;
}
else if(port_num == WANOPT_SEC) {
/* For Secondary Port 1 */
max_permitted_baud =
(card->type == SDLA_S514) ?
SEC_MAX_BAUD_RATE_S514 :
SEC_MAX_BAUD_RATE_S508;
}
if(conf->bps > max_permitted_baud) {
conf->bps = max_permitted_baud;
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);
}
card->wandev.bps = conf->bps;
}else{
card->wandev.bps = 0;
}
if (conf->u.chdlc.fast_isr == WANOPT_YES){
DEBUG_EVENT("%s: Configuring Fast Interrupt Handlers\n",
card->devname);
card->u.c.protocol_options|=INSTALL_FAST_INT_HANDLERS;
}
/* Setup the Port MTU */
if((port_num == WANOPT_PRI) || card->u.c.receive_only) {
/* For Primary Port 0 */
card->wandev.mtu =
(conf->mtu >= MIN_LGTH_CHDLC_DATA_CFG) ?
wp_min(conf->mtu, PRI_MAX_NO_DATA_BYTES_IN_FRAME) :
CHDLC_DFLT_DATA_LEN;
} else if(port_num == WANOPT_SEC) {
/* For Secondary Port 1 */
card->wandev.mtu =
(conf->mtu >= MIN_LGTH_CHDLC_DATA_CFG) ?
wp_min(conf->mtu, SEC_MAX_NO_DATA_BYTES_IN_FRAME) :
CHDLC_DFLT_DATA_LEN;
}
/* Add on a PPP Header */
card->wandev.mtu += PPP_HEADER_LEN;
/* Set up the interrupt status area */
/* Read the CHDLC Configuration and obtain:
* Ptr to shared memory infor struct
* Use this pointer to calculate the value of card->u.c.flags !
*/
mb1->wan_data_len = 0;
mb1->wan_command = READ_CHDLC_CONFIGURATION;
err = card->hw_iface.cmd(card->hw, card->mbox_off, mb1);
if(err != COMMAND_OK) {
wan_clear_bit(1, (void*)&card->wandev.critical);
if(card->type != SDLA_S514)
enable_irq(card->wandev.irq/* ALEX_TODAY ard->hw.irq*/);
chdlc_error(card, err, mb1);
return -EIO;
}
/* Alex Apr 8 2004 Sangoma ISA card */
card->flags_off =
((CHDLC_CONFIGURATION_STRUCT *)mb1->wan_data)->
ptr_shared_mem_info_struct;
card->intr_type_off =
card->flags_off +
offsetof(SHARED_MEMORY_INFO_STRUCT, interrupt_info_struct) +
offsetof(INTERRUPT_INFORMATION_STRUCT, interrupt_type);
card->intr_perm_off =
card->flags_off +
offsetof(SHARED_MEMORY_INFO_STRUCT, interrupt_info_struct) +
offsetof(INTERRUPT_INFORMATION_STRUCT, interrupt_permission);
card->fe_status_off =
card->flags_off +
offsetof(SHARED_MEMORY_INFO_STRUCT, FT1_info_struct) +
offsetof(FT1_INFORMATION_STRUCT, parallel_port_A_input);
/* This is for the ports link state */
card->wandev.state = WAN_DUALPORT;
card->u.c.state = WAN_DISCONNECTED;
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);
card->configured = 1;
}
if (chdlc_set_intr_mode(card, APP_INT_ON_TIMER)){
printk (KERN_INFO "%s: Failed to set interrupt triggers!\n",
card->devname);
return -EIO;
}
/* Mask the Timer interrupt */
card->hw_iface.clear_bit(card->hw, card->intr_perm_off, APP_INT_ON_TIMER);
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;
private_area_t* chan;
unsigned long smp_flags;
/* sanity checks */
if((wandev == NULL) || (wandev->private == NULL))
return -EFAULT;
if(wandev->state == WAN_UNCONFIGURED)
return -ENODEV;
/* more sanity checks */
dev = WAN_DEVLE2DEV(WAN_LIST_FIRST(&card->wandev.dev_head));
if(dev == NULL)
return -ENODEV;
if((chan=dev->priv) == NULL)
return -ENODEV;
if(chan->update_comms_stats){
return -EAGAIN;
}
spin_lock_irqsave(&card->wandev.lock, smp_flags);
update_comms_stats(card, chan);
chan->update_comms_stats=0;
spin_unlock_irqrestore(&card->wandev.lock, smp_flags);
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)
{
struct ppp_device *pppdev=NULL;
struct sppp *sp=NULL;
sdla_t* card = wandev->private;
private_area_t* chan;
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;
}
if(++card->wandev.new_if_cnt > 1) {
DEBUG_EVENT("%s: Error: Interface already configured!\n",
card->devname);
--card->wandev.new_if_cnt;
return -EEXIST;
}
/* allocate and initialize private data */
chan = kmalloc(sizeof(private_area_t), GFP_KERNEL);
if(chan == NULL){
--card->wandev.new_if_cnt;
return -ENOMEM;
}
memset(chan, 0, sizeof(private_area_t));
chan->card = card;
/* initialize data */
strncpy(card->u.c.if_name, conf->name,WAN_IFNAME_SZ);
strncpy(chan->if_name,conf->name,WAN_IFNAME_SZ);
/* Initialize the trace queue */
if (!conf->max_trace_queue){
conf->max_trace_queue=MAX_TRACE_QUEUE;
}
wan_trace_info_init(&chan->trace_info,conf->max_trace_queue);
/* Initialize the receive bh handler */
WAN_TASKLET_INIT((&chan->tasklet),
0, wp_bh, (unsigned long)chan);
WAN_IFQ_INIT((&chan->rx_queue),0);
//We don't need this any more
chan->route_status = NO_ROUTE;
chan->route_removed = 0;
card->u.c.async_mode = conf->async_mode;
printk(KERN_INFO "%s: Firmware running in HDLC STREAMING Mode\n",
wandev->name);
chan->common.prot_ptr=NULL;
/* setup for asynchronous mode */
if(conf->async_mode) {
printk(KERN_INFO "%s: Configuring for asynchronous mode\n",
wandev->name);
if(card->u.c.comm_port == WANOPT_PRI) {
printk(KERN_INFO
"%s:Asynchronous mode on secondary port only\n",
wandev->name);
err=-EINVAL;
goto new_if_error;
}
if (strcmp(conf->usedby, "API") == 0){
printk(KERN_INFO "%s: Running in API Async Mode\n",
wandev->name);
chan->common.usedby = API;
wan_reg_api(chan, dev, card->devname);
}else{
DEBUG_EVENT("%s: Invalid Async Operation Mode: %s\n",
chan->if_name, conf->usedby);
err=-EINVAL;
goto new_if_error;
}
if(!card->wandev.clocking) {
printk(KERN_INFO
"%s: Asynch. clocking must be 'Internal'\n",
wandev->name);
err=-EINVAL;
goto new_if_error;
}
if((card->wandev.bps < MIN_ASY_BAUD_RATE) ||
(card->wandev.bps > MAX_ASY_BAUD_RATE)) {
printk(KERN_INFO "%s: Selected baud rate is invalid.\n",
wandev->name);
printk(KERN_INFO "Must be between %u and %u bps.\n",
MIN_ASY_BAUD_RATE, MAX_ASY_BAUD_RATE);
err=-EINVAL;
goto new_if_error;
}
card->u.c.api_options = 0;
if (conf->asy_data_trans == WANOPT_YES) {
card->u.c.api_options |= ASY_RX_DATA_TRANSPARENT;
}
card->u.c.protocol_options = 0;
if (conf->rts_hs_for_receive == WANOPT_YES) {
card->u.c.protocol_options |= ASY_RTS_HS_FOR_RX;
}
if (conf->xon_xoff_hs_for_receive == WANOPT_YES) {
card->u.c.protocol_options |= ASY_XON_XOFF_HS_FOR_RX;
}
if (conf->xon_xoff_hs_for_transmit == WANOPT_YES) {
card->u.c.protocol_options |= ASY_XON_XOFF_HS_FOR_TX;
}
if (conf->dcd_hs_for_transmit == WANOPT_YES) {
card->u.c.protocol_options |= ASY_DCD_HS_FOR_TX;
}
if (conf->cts_hs_for_transmit == WANOPT_YES) {
card->u.c.protocol_options |= ASY_CTS_HS_FOR_TX;
}
card->u.c.tx_bits_per_char = conf->tx_bits_per_char;
card->u.c.rx_bits_per_char = conf->rx_bits_per_char;
card->u.c.stop_bits = conf->stop_bits;
card->u.c.parity = conf->parity;
card->u.c.break_timer = conf->break_timer;
card->u.c.inter_char_timer = conf->inter_char_timer;
card->u.c.rx_complete_length = conf->rx_complete_length;
card->u.c.xon_char = conf->xon_char;
}else{
/* Setup wanpipe as a router (WANPIPE) or as an API */
if( strcmp(conf->usedby, "WANPIPE") == 0) {
printk(KERN_INFO "%s:%s: Interface running in WANPIPE mode!\n",
wandev->name,chan->if_name);
chan->common.usedby=WANPIPE;
pppdev=kmalloc(sizeof(struct ppp_device),GFP_KERNEL);
if (!pppdev){
err = -ENOMEM;
goto new_if_error;
}
memset(pppdev,0,sizeof(struct ppp_device));
chan->common.prot_ptr=(void*)pppdev;
/* Attach PPP protocol layer to pppdev
* The wp_sppp_attach() will initilize the dev structure
* and setup ppp layer protocols.
* All we have to do is to bind in:
* if_open(), if_close(), if_send() and get_stats() functions.
*/
pppdev->dev=dev;
/* Get authentication info. */
if(conf->pap == WANOPT_YES){
pppdev->sppp.myauth.proto = PPP_PAP;
}else if(conf->chap == WANOPT_YES){
pppdev->sppp.myauth.proto = PPP_CHAP;
}else{
pppdev->sppp.myauth.proto = 0;
}
if(pppdev->sppp.myauth.proto){
memcpy(pppdev->sppp.myauth.name, conf->userid, AUTHNAMELEN);
memcpy(pppdev->sppp.myauth.secret, conf->passwd, AUTHNAMELEN);
}
pppdev->sppp.gateway = conf->gateway;
if (conf->if_down){
pppdev->sppp.dynamic_ip = 1;
}
sprintf(pppdev->sppp.hwdevname,"%s",card->devname);
wp_sppp_attach(pppdev);
sp = &pppdev->sppp;
/* Enable PPP Debugging */
if (conf->protocol == WANCONFIG_CHDLC){
printk(KERN_INFO "%s: Starting Kernel CISCO HDLC protocol\n",
card->devname);
sp->pp_flags |= PP_CISCO;
conf->ignore_dcd = WANOPT_YES;
conf->ignore_cts = WANOPT_YES;
}else{
printk(KERN_INFO "%s: Starting Kernel Sync PPP protocol\n",
card->devname);
sp->pp_flags &= ~PP_CISCO;
dev->type = ARPHRD_PPP;
}
#ifdef CONFIG_PRODUCT_WANPIPE_ANNEXG
}else if (strcmp(conf->usedby, "ANNEXG") == 0) {
printk(KERN_INFO "%s:%s: Interface running in ANNEXG mode!\n",
wandev->name,chan->if_name);
chan->common.usedby=ANNEXG;
if (strlen(conf->label)){
strncpy(chan->label,conf->label,WAN_IF_LABEL_SZ);
}
#endif
}else if (strcmp(conf->usedby, "STACK") == 0) {
chan->common.usedby = STACK;
DEBUG_EVENT( "%s:%s: Running in Stack mode.\n",
card->devname,chan->if_name);
}else if (strcmp(conf->usedby, "API") == 0) {
chan->common.usedby = API;
wan_reg_api(chan, dev, card->devname);
DEBUG_EVENT( "%s:%s: Running in API mode.\n",
card->devname,chan->if_name);
}else{
printk(KERN_INFO
"%s:%s: Error: Unsupported operation mode!\n",
wandev->name,chan->if_name);
err=-EINVAL;
goto new_if_error;
}
}
if (conf->single_tx_buf) {
DEBUG_EVENT("%s: Enabling Single Tx Buffer \n",chan->if_name);
card->u.c.protocol_options|=SINGLE_TX_BUFFER;
}
/* Get Multicast Information */
chan->mc = conf->mc;
/* prepare network device data space for registration */
if (conf->ignore_dcd == WANOPT_YES || conf->ignore_cts == WANOPT_YES){
printk(KERN_INFO "%s: Ignore modem changes DCD/CTS\n",card->devname);
chan->ignore_modem=1;
}else{
printk(KERN_INFO "%s: Restart protocol on modem changes DCD/CTS\n",
card->devname);
}
dev->init = &if_init;
dev->priv = chan;
chan->dev=dev;
/*
* Create interface file in proc fs.
*/
err = wanrouter_proc_add_interface(wandev,
&chan->dent,
card->u.c.if_name,
dev);
if (err){
printk(KERN_INFO
"%s: can't create /proc/net/router/mprot/%s entry!\n",
card->devname, card->u.c.if_name);
err = -ENOMEM;
goto new_if_error;
}
return 0;
new_if_error:
--card->wandev.new_if_cnt;
if (chan->common.usedby == API){
wan_unreg_api(chan, card->devname);
}
if (chan){
chan->common.prot_ptr=NULL;
kfree(chan);
}
if (pppdev){
wp_sppp_detach(dev);
kfree(pppdev);
}
dev->priv=NULL;
return err;
}
/*============================================================================
* Delete logical channel.
*/
static int del_if (wan_device_t* wandev, netdevice_t* dev)
{
private_area_t *chan = dev->priv;
sdla_t *card = chan->card;
unsigned long smp_flags;
#ifdef CONFIG_PRODUCT_WANPIPE_ANNEXG
if (chan->common.usedby == ANNEXG && chan->annexg_dev){
netdevice_t *tmp_dev;
int err;
printk(KERN_INFO "%s: Unregistering Lapb Protocol\n",wandev->name);
if (!IS_FUNC_CALL(lapb_protocol,lapb_unregister)){
wan_spin_lock_irq(&wandev->lock, &smp_flags);
chan->annexg_dev = NULL;
wan_spin_unlock_irq(&wandev->lock, &smp_flags);
return 0;
}
wan_spin_lock_irq(&wandev->lock, &smp_flags);
tmp_dev=chan->annexg_dev;
chan->annexg_dev=NULL;
wan_spin_unlock_irq(&wandev->lock, &smp_flags);
if ((err=lapb_protocol.lapb_unregister(tmp_dev))){
wan_spin_lock_irq(&wandev->lock, &smp_flags);
chan->annexg_dev=tmp_dev;
wan_spin_unlock_irq(&wandev->lock, &smp_flags);
return err;
}
}
#endif
/* Delete interface name from proc fs. */
wanrouter_proc_delete_interface(wandev, card->u.c.if_name);
wan_spin_lock_irq(&wandev->lock,&smp_flags);
if (chan->common.prot_ptr){
/* Detach the PPP layer */
printk(KERN_INFO "%s: Detaching SyncPPP Module from %s\n",
wandev->name,dev->name);
wp_sppp_detach(dev);
}
/* 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;
if (chan->common.prot_ptr){
kfree(chan->common.prot_ptr);
chan->common.prot_ptr= NULL;
}
chdlc_set_intr_mode(card, 0);
if (card->u.c.comm_enabled){
chdlc_comm_disable(card);
}
wan_spin_unlock_irq(&wandev->lock,&smp_flags);
port_set_state(card, WAN_DISCONNECTED);
wan_unreg_api(chan, card->devname);
/* TE1 - Unconfiging, only on shutdown */
if (IS_TE1_CARD(card)) {
if (card->wandev.fe_iface.unconfig){
card->wandev.fe_iface.unconfig(&card->fe);
}
}
return 0;
}
/****** 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)
{
private_area_t* chan = dev->priv;
sdla_t* card = chan->card;
wan_device_t* wandev = &card->wandev;
/* NOTE: Most of the dev initialization was
* done in wp_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 = &if_tx_timeout;
dev->watchdog_timeo = TX_TIMEOUT;
#endif
if (!chan->common.prot_ptr){
dev->flags |= IFF_POINTOPOINT;
dev->flags |= IFF_NOARP;
dev->type = ARPHRD_PPP;
dev->mtu = card->wandev.mtu;
dev->hard_header_len = 0;
dev->hard_header = NULL;
dev->rebuild_header = NULL;
}
/* Overwrite the sppp ioctl, because we need to run
* our debugging commands via ioctl(). However
* call syncppp ioctl with in it :) */
dev->do_ioctl = &if_do_ioctl;
/* 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.
* wp_sppp_attach() sets this to 10, but
* 100 will give us more room at low speeds.
*/
dev->tx_queue_len = 100;
return 0;
}
/*============================================================================
* Handle transmit timeout event from netif watchdog
*/
static void if_tx_timeout (netdevice_t *dev)
{
private_area_t* chan = dev->priv;
sdla_t *card = chan->card;
/* 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.
*/
++card->wandev.stats.collisions;
chan->tick_counter = jiffies;
card->hw_iface.set_bit(card->hw, card->intr_perm_off, APP_INT_ON_TX_FRAME);
printk (KERN_INFO "%s: Transmit timed out on %s\n", card->devname,dev->name);
netif_wake_queue (dev);
dev->trans_start = jiffies;
if (chan->common.usedby == STACK){
wanpipe_lip_kick(chan,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)
{
private_area_t* chan = dev->priv;
sdla_t* card = chan->card;
struct timeval tv;
/* Only one open per interface is allowed */
if (open_dev_check(dev))
return -EBUSY;
/* Start PPP Layer */
if (chan->common.prot_ptr){
if (wp_sppp_open(dev)){
return -EIO;
}
}
do_gettimeofday(&tv);
chan->router_start_time = tv.tv_sec;
WAN_NETIF_START_QUEUE(dev);
WAN_NETIF_CARRIER_OFF(dev);
if (chan->common.state == WAN_CONNECTED){
WAN_NETIF_CARRIER_ON(dev);
}
wanpipe_open(card);
card->u.c.timer_int_enabled |= TMR_INT_ENABLED_CONFIG;
card->hw_iface.set_bit(card->hw, card->intr_perm_off, APP_INT_ON_TIMER);
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)
{
private_area_t* chan = dev->priv;
sdla_t* card = chan->card;
WAN_TASKLET_KILL((&chan->tasklet));
/* Stop the PPP Layer */
if (chan->common.prot_ptr){
wp_sppp_close(dev);
}
stop_net_queue(dev);
#if defined(LINUX_2_1)
dev->start=0;
#endif
wanpipe_close(card);
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)
{
private_area_t *chan = dev->priv;
sdla_t *card = chan->card;
int udp_type = 0;
unsigned long smp_flags=0;
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.
*/
++card->wandev.stats.collisions;
if((jiffies - chan->tick_counter) < (5 * HZ)) {
return 1;
}
if_tx_timeout(dev);
}
#else
netif_stop_queue(dev);
#endif
if (chan->common.usedby != ANNEXG &&
chan->common.usedby != STACK &&
ntohs(skb->protocol) != htons(PVC_PROT)){
/* check the udp packet type */
udp_type = udp_pkt_type(skb, card);
if (udp_type == UDP_CPIPE_TYPE){
if(store_udp_mgmt_pkt(UDP_PKT_FRM_STACK, card, skb, dev,
chan)){
card->hw_iface.set_bit(card->hw, card->intr_perm_off, APP_INT_ON_TIMER);
}
start_net_queue(dev);
return 0;
}
}
/* Lock the 508 Card: SMP is supported */
if(card->type != SDLA_S514){
s508_lock(card,&smp_flags);
}
err=0;
if (wan_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;
start_net_queue(dev);
goto if_send_crit_exit;
}
if (card->u.c.state != WAN_CONNECTED){
++card->wandev.stats.tx_carrier_errors;
start_net_queue(dev);
goto if_send_crit_exit;
}
/* If it's an API packet pull off the API
* header. Also check that the packet size
* is larger than the API header
*/
if (chan->common.usedby == API){
/* discard the frame if we are configured for */
/* 'receive only' mode or if there is no data */
if (card->u.c.receive_only ||
(wan_skb_len(skb) <= sizeof(api_tx_hdr_t))) {
++card->wandev.stats.tx_dropped;
goto if_send_crit_exit;
}
wan_skb_pull(skb,sizeof(api_tx_hdr_t));
}
if ((err=chdlc_send(card, skb->data, skb->len))){
if(card->type == SDLA_S514){
wan_smp_flag_t smp_flags1;
wan_spin_lock_irq(&card->wandev.lock,&smp_flags1);
err=1;
stop_net_queue(dev);
wan_spin_unlock_irq(&card->wandev.lock,&smp_flags1);
} else {
err=1;
stop_net_queue(dev);
}
}else{
++card->wandev.stats.tx_packets;
card->wandev.stats.tx_bytes += skb->len;
dev->trans_start = jiffies;
start_net_queue(dev);
wan_capture_trace_packet(card, &chan->trace_info, skb, TRC_OUTGOING_FRM);
}
if_send_crit_exit:
if (err==0){
wan_skb_free(skb);
}else{
chan->tick_counter = jiffies;
card->hw_iface.set_bit(card->hw, card->intr_perm_off, APP_INT_ON_TX_FRAME);
}
wan_clear_bit(SEND_CRIT, (void*)&card->wandev.critical);
if(card->type != SDLA_S514){
s508_unlock(card,&smp_flags);
}
return err;
}
/*============================================================================
* Get ethernet-style interface statistics.
* Return a pointer to struct enet_statistics.
*/
static struct net_device_stats gstats;
static struct net_device_stats* if_stats (netdevice_t* dev)
{
sdla_t *my_card;
private_area_t* chan;
/* 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 ((chan=dev->priv) == NULL)
return &gstats;
my_card = chan->card;
if (!my_card){
return &gstats;
}
return &my_card->wandev.stats;
}
/****** Cisco HDLC Firmware Interface Functions *******************************/
/*============================================================================
* Read firmware code version.
* Put code version as ASCII string in str.
*/
static int chdlc_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_CHDLC_CODE_VERSION;
err = card->hw_iface.cmd(card->hw, card->mbox_off, mb);
if(err != COMMAND_OK) {
chdlc_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 chdlc_configure (sdla_t* card, void* data)
{
int err;
wan_mbox_t *mb = &card->wan_mbox;
int data_length = sizeof(CHDLC_CONFIGURATION_STRUCT);
mb->wan_data_len = data_length;
memcpy(mb->wan_data, data, data_length);
mb->wan_command = SET_CHDLC_CONFIGURATION;
err = card->hw_iface.cmd(card->hw, card->mbox_off, mb);
if (err != COMMAND_OK) chdlc_error (card, err, mb);
return err;
}
/*============================================================================
* Set interrupt mode -- HDLC Version.
*/
static int chdlc_set_intr_mode (sdla_t* card, unsigned mode)
{
wan_mbox_t* mb = &card->wan_mbox;
CHDLC_INT_TRIGGERS_STRUCT* int_data =
(CHDLC_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;
mb->wan_data_len = sizeof(CHDLC_INT_TRIGGERS_STRUCT);
mb->wan_command = SET_CHDLC_INTERRUPT_TRIGGERS;
err = card->hw_iface.cmd(card->hw, card->mbox_off, mb);
if (err != COMMAND_OK)
chdlc_error (card, err, mb);
return err;
}
/*============================================================================
* Enable communications.
*/
static int chdlc_comm_enable (sdla_t* card)
{
int err;
wan_mbox_t* mb = &card->wan_mbox;
mb->wan_data_len = 0;
mb->wan_command = ENABLE_CHDLC_COMMUNICATIONS;
err = card->hw_iface.cmd(card->hw, card->mbox_off, mb);
if (err != COMMAND_OK)
chdlc_error(card, err, mb);
else
card->u.c.comm_enabled=1;
return err;
}
/*============================================================================
* Disable communications and Drop the Modem lines (DCD and RTS).
*/
static int chdlc_comm_disable (sdla_t* card)
{
int err;
wan_mbox_t* mb = &card->wan_mbox;
mb->wan_data_len = 0;
mb->wan_command = DISABLE_CHDLC_COMMUNICATIONS;
err = card->hw_iface.cmd(card->hw, card->mbox_off, mb);
if (err != COMMAND_OK)
chdlc_error(card,err,mb);
return err;
}
/*============================================================================
* Read communication error statistics.
*/
static int chdlc_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_ERROR_STATS;
err = card->hw_iface.cmd(card->hw, card->mbox_off, mb);
if (err != COMMAND_OK)
chdlc_error(card,err,mb);
return err;
}
/*============================================================================
* Read CHDLC operational statistics.
*/
static int chdlc_read_op_stats (sdla_t* card)
{
int err;
wan_mbox_t* mb = &card->wan_mbox;
mb->wan_data_len = 0;
mb->wan_command = READ_CHDLC_OPERATIONAL_STATS;
err = card->hw_iface.cmd(card->hw, card->mbox_off, mb);
if (err != COMMAND_OK)
chdlc_error(card,err,mb);
return err;
}
/*============================================================================
* Update communications error and general packet statistics.
*/
static int update_comms_stats(sdla_t* card,
private_area_t* chan)
{
wan_mbox_t* mb = &card->wan_mbox;
COMMS_ERROR_STATS_STRUCT* err_stats;
CHDLC_OPERATIONAL_STATS_STRUCT *op_stats;
/* 1. On the first timer interrupt, update T1/E1 alarms
* and PMON counters (only for T1/E1 card) (TE1)
*/
/* TE1 Update T1/E1 alarms */
if (IS_TE1_CARD(card)) {
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(chdlc_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_count;
card->wandev.stats.rx_crc_errors =
err_stats->CRC_err_count;
card->wandev.stats.rx_frame_errors =
err_stats->Rx_abort_count;
card->wandev.stats.rx_fifo_errors =
err_stats->Rx_dis_pri_bfrs_full_count;
card->wandev.stats.rx_missed_errors =
card->wandev.stats.rx_fifo_errors;
card->wandev.stats.tx_aborted_errors =
err_stats->sec_Tx_abort_count;
/* on the second timer interrupt, read the operational statistics */
if(chdlc_read_op_stats(card))
return 1;
op_stats = (CHDLC_OPERATIONAL_STATS_STRUCT *)mb->wan_data;
card->wandev.stats.rx_length_errors =
(op_stats->Rx_Data_discard_short_count +
op_stats->Rx_Data_discard_long_count);
return 0;
}
/*============================================================================
* Send packet.
* Return: 0 - o.k.
* 1 - no transmit buffers available
*/
static int chdlc_send (sdla_t* card, void* data, unsigned len)
{
CHDLC_DATA_TX_STATUS_EL_STRUCT txbuf;
card->hw_iface.peek(card->hw, card->u.c.txbuf_off, &txbuf, sizeof(txbuf));
if (txbuf.opp_flag)
return 1;
card->hw_iface.poke(card->hw, txbuf.ptr_data_bfr, data, len);
txbuf.frame_length = len;
card->hw_iface.poke(card->hw, card->u.c.txbuf_off, &txbuf, sizeof(txbuf));
txbuf.opp_flag = 1; /* start transmission */
card->hw_iface.poke_byte(card->hw,
card->u.c.txbuf_off+offsetof(CHDLC_DATA_TX_STATUS_EL_STRUCT, opp_flag),
txbuf.opp_flag);
/* Update transmit buffer control fields */
card->u.c.txbuf_off += sizeof(txbuf);
if (card->u.c.txbuf_off > card->u.c.txbuf_last_off)
card->u.c.txbuf_off = card->u.c.txbuf_base_off;
return 0;
}
/*============================================================================
* TE1
* Read value from PMC register.
*/
static unsigned char read_front_end_reg (void* card1, ...)
{
va_list args;
sdla_t *card = (sdla_t*)card1;
wan_mbox_t* mb = &card->wan_mbox;
char* data = mb->wan_data;
u16 reg, line_no;
int err;
va_start(args, card1);
line_no = (u16)va_arg(args, int);
reg = (u16)va_arg(args, int);
va_end(args);
((FRONT_END_REG_STRUCT *)data)->register_number = (unsigned short)reg;
mb->wan_data_len = sizeof(FRONT_END_REG_STRUCT);
mb->wan_command = READ_FRONT_END_REGISTER;
err = card->hw_iface.cmd(card->hw, card->mbox_off, mb);
if (err != COMMAND_OK)
chdlc_error(card,err,mb);
return(((FRONT_END_REG_STRUCT *)data)->register_value);
}
/*============================================================================
* TE1
* Write value to PMC register.
*/
static int write_front_end_reg (void* card1, ... )
{
va_list args;
sdla_t* card = (sdla_t*)card1;
wan_mbox_t* mb = &card->wan_mbox;
u16 reg, line_no;
u8 value;
char* data = mb->wan_data;
int err;
int retry=15;
va_start(args, card1);
line_no = (u16)va_arg(args, int);
reg = (u16)va_arg(args, int);
value = (u8)va_arg(args, int);
va_end(args);
do {
((FRONT_END_REG_STRUCT *)data)->register_number = (unsigned short)reg;
((FRONT_END_REG_STRUCT *)data)->register_value = value;
mb->wan_data_len = sizeof(FRONT_END_REG_STRUCT);
mb->wan_command = WRITE_FRONT_END_REGISTER;
err = card->hw_iface.cmd(card->hw, card->mbox_off, mb);
if (err != COMMAND_OK){
chdlc_error(card,err,mb);
}
}while(err && --retry);
return err;
}
/****** 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 chdlc_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 S514_BOTH_PORTS_SAME_CLK_MODE:
if(cmd == SET_CHDLC_CONFIGURATION) {
printk(KERN_INFO
"%s: Configure both ports for the same clock source\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 wsppp_isr (sdla_t* card)
{
netdevice_t* dev;
SHARED_MEMORY_INFO_STRUCT flags;
private_area_t *chan;
int i;
/* Check for which port the interrupt has been generated
* Since Secondary Port is piggybacking on the Primary
* the check must be done here.
*/
if (!card->hw){
WAN_IRQ_RETURN(WAN_IRQ_HANDLED);
}
/* Start card isr critical area */
wan_set_bit(0,&card->in_isr);
card->spurious = 0;
card->hw_iface.peek(card->hw, card->flags_off, &flags, sizeof(flags));
dev = WAN_DEVLE2DEV(WAN_LIST_FIRST(&card->wandev.dev_head));
/* If we get an interrupt with no network device, stop the interrupts
* and issue an error */
if ((!dev || !dev->priv) && flags.interrupt_info_struct.interrupt_type !=
COMMAND_COMPLETE_APP_INT_PEND){
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(wan_test_bit(PERI_CRIT, (void*)&card->wandev.critical)) {
card->hw_iface.poke_byte(card->hw, card->intr_type_off, 0x00);
goto isr_done;
}
/* On a 508 Card, if critical due to if_send
* Major Error !!!
*/
if(card->type != SDLA_S514) {
if(wan_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_info_struct.interrupt_type) {
case RX_APP_INT_PEND: /* 0x01: receive interrupt */
rx_intr(card);
break;
case TX_APP_INT_PEND: /* 0x02: transmit interrupt */
chan=dev->priv;
card->hw_iface.clear_bit(card->hw, card->intr_perm_off, APP_INT_ON_TX_FRAME);
if (chan->common.usedby == STACK){
start_net_queue(dev);
wanpipe_lip_kick(chan,0);
break;
}
if (chan->common.usedby == API){
start_net_queue(dev);
wan_wakeup_api(chan);
break;
}
#ifdef CONFIG_PRODUCT_WANPIPE_ANNEXG
if (chan->common.usedby == ANNEXG &&
chan->annexg_dev){
start_net_queue(dev);
if (IS_FUNC_CALL(lapb_protocol,lapb_mark_bh)){
lapb_protocol.lapb_mark_bh(chan->annexg_dev);
}
break;
}
#endif
wake_net_dev(dev);
break;
case COMMAND_COMPLETE_APP_INT_PEND:/* 0x04: cmd cplt */
++card->timer_int_enabled;
break;
case CHDLC_EXCEP_COND_APP_INT_PEND: /* 0x20 */
process_chdlc_exception(card);
break;
case GLOBAL_EXCEP_COND_APP_INT_PEND:
process_global_exception(card);
/* Reset the 56k or T1/E1 front end exception condition */
if(IS_56K_CARD(card) || IS_TE1_CARD(card)) {
FRONT_END_STATUS_STRUCT FE_status;
card->hw_iface.peek(card->hw,
card->fe_status_off,
&FE_status,
sizeof(FE_status));
FE_status.opp_flag = 0x01;
card->hw_iface.poke(card->hw,
card->fe_status_off,
&FE_status,
sizeof(FE_status));
}
break;
case TIMER_APP_INT_PEND:
timer_intr(card);
break;
default:
if (card->next){
wan_set_bit(0,&card->spurious);
break;
}
printk(KERN_INFO "%s: spurious interrupt 0x%02X!\n",
card->devname,
flags.interrupt_info_struct.interrupt_type);
printk(KERN_INFO "Code name: ");
for(i = 0; i < 4; i ++)
printk("%c",
flags.global_info_struct.codename[i]);
printk("\n");
printk(KERN_INFO "Code version: ");
for(i = 0; i < 4; i ++)
printk("%c",
flags.global_info_struct.codeversion[i]);
printk("\n");
break;
}
isr_done:
card->in_isr = 0;
card->hw_iface.poke_byte(card->hw, card->intr_type_off, 0x00);
WAN_IRQ_RETURN(WAN_IRQ_HANDLED);
}
/*============================================================================
* Receive interrupt handler.
*/
static void rx_intr (sdla_t* card)
{
netdevice_t *dev;
private_area_t *chan;
SHARED_MEMORY_INFO_STRUCT flags;
CHDLC_DATA_RX_STATUS_EL_STRUCT rxbuf;
struct sk_buff *skb;
unsigned len;
unsigned addr;
void *buf;
int i,udp_type;
unsigned int tmp_prev_error;
card->hw_iface.peek(card->hw, card->flags_off, &flags, sizeof(flags));
card->hw_iface.peek(card->hw, card->u.c.rxmb_off, &rxbuf, sizeof(rxbuf));
addr = rxbuf.ptr_data_bfr;
if (rxbuf.opp_flag != 0x01) {
printk(KERN_INFO
"%s: corrupted Rx buffer @ 0x%X, flag = 0x%02X!\n",
card->devname, (unsigned)card->u.c.rxmb_off, rxbuf.opp_flag);
printk(KERN_INFO "Code name: ");
for(i = 0; i < 4; i ++)
printk(KERN_INFO "%c",
flags.global_info_struct.codename[i]);
printk(KERN_INFO "\n");
printk(KERN_INFO "Code version: ");
for(i = 0; i < 4; i ++)
printk(KERN_INFO "%c",
flags.global_info_struct.codeversion[i]);
printk(KERN_INFO "\n");
/* Bug Fix: Mar 6 2000
* If we get a corrupted mailbox, it measn that driver
* is out of sync with the firmware. There is no recovery.
* If we don't turn off all interrupts for this card
* the machine will crash.
*/
printk(KERN_INFO "%s: Critical router failure ...!!!\n",
card->devname);
printk(KERN_INFO "Please contact Sangoma Technologies !\n");
chdlc_set_intr_mode(card,0);
return;
}
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;
tmp_prev_error=chan->prev_error;
chan->prev_error=rxbuf.error_flag;
if (rxbuf.error_flag){
goto rx_exit;
}
if (tmp_prev_error){
goto rx_exit;
}
if (chan->common.usedby == ANNEXG || chan->common.usedby == STACK){
if (rxbuf.frame_length <= 2 || rxbuf.frame_length > 4103){
DEBUG_EVENT("%s: Bad Rx Frame Length %i\n",
card->devname,rxbuf.frame_length);
goto rx_exit;
}
}else{
if (rxbuf.frame_length < 7 || rxbuf.frame_length > 4103){
goto rx_exit;
}
}
/* Make sure that data len is greater than CRC_LEN
* before we remove the CRC bytes */
if (rxbuf.frame_length <= CRC_LENGTH){
++card->wandev.stats.rx_dropped;
goto rx_exit;
}
/* Take off two CRC bytes */
if (chan->common.usedby == API){
len = rxbuf.frame_length;
}else{
len = rxbuf.frame_length - CRC_LENGTH;
}
/* Allocate socket buffer */
skb = dev_alloc_skb(len+2);
if (skb == NULL) {
if (net_ratelimit()){
printk(KERN_INFO "%s: Error: No memory available!\n",
card->devname);
}
++card->wandev.stats.rx_dropped;
goto rx_exit;
}
/* Copy data to the socket buffer */
if ((addr + len) > card->u.c.rx_top_off + 1) {
unsigned tmp = card->u.c.rx_top_off - addr + 1;
buf = skb_put(skb, tmp);
card->hw_iface.peek(card->hw, addr, buf, tmp);
addr = card->u.c.rx_base_off;
len -= tmp;
}
buf = skb_put(skb, len);
card->hw_iface.peek(card->hw, addr, buf, len);
wan_capture_trace_packet(card, &chan->trace_info, skb, TRC_INCOMING_FRM);
udp_type = udp_pkt_type(skb, card);
if(udp_type == UDP_CPIPE_TYPE) {
card->wandev.stats.rx_packets ++;
card->wandev.stats.rx_bytes += skb->len;
skb->protocol = htons(ETH_P_IP);
if(store_udp_mgmt_pkt(UDP_PKT_FRM_NETWORK,
card, skb, dev, chan)) {
card->hw_iface.set_bit(card->hw, card->intr_perm_off, APP_INT_ON_TIMER);
}
}else if (chan->common.usedby == ANNEXG){
if (chan->annexg_dev){
skb->protocol = htons(ETH_P_X25);
skb->dev = chan->annexg_dev;
wan_skb_reset_mac_header(skb);
if (wan_skb_queue_len(&chan->rx_queue) > MAX_RX_QUEUE){
wan_skb_free(skb);
if (net_ratelimit()){
DEBUG_EVENT("%s: Error Rx queue full, dropping pkt!\n",
card->devname);
}
++card->wandev.stats.rx_dropped;
goto rx_exit;
}
wan_skb_queue_tail(&chan->rx_queue,skb);
WAN_TASKLET_SCHEDULE((&chan->tasklet));
}else{
wan_skb_free(skb);
++card->wandev.stats.rx_errors;
}
}else if (chan->common.usedby == STACK){
skb->dev = chan->annexg_dev;
wan_skb_reset_mac_header(skb);
if (wan_skb_queue_len(&chan->rx_queue) > MAX_RX_QUEUE){
wan_skb_free(skb);
if (net_ratelimit()){
DEBUG_EVENT("%s: Error:(STACK) Rx queue full, dropping pkt!\n",
card->devname);
}
++card->wandev.stats.rx_dropped;
goto rx_exit;
}
wan_skb_queue_tail(&chan->rx_queue,skb);
WAN_TASKLET_SCHEDULE((&chan->tasklet));
}else{
if (wan_skb_queue_len(&chan->rx_queue) > MAX_RX_QUEUE){
wan_skb_free(skb);
if (net_ratelimit()){
DEBUG_EVENT("%s: Error Rx queue full, dropping pkt!\n",
card->devname);
}
++card->wandev.stats.rx_dropped;
goto rx_exit;
}
/* Pass it up the protocol stack */
skb->protocol = htons(ETH_P_WAN_PPP);
skb->dev = dev;
wan_skb_reset_mac_header(skb);
wan_skb_queue_tail(&chan->rx_queue,skb);
WAN_TASKLET_SCHEDULE((&chan->tasklet));
}
rx_exit:
/* Release buffer element and calculate a pointer to the next one */
rxbuf.opp_flag = 0x00;
card->hw_iface.poke(card->hw, card->u.c.rxmb_off, &rxbuf, sizeof(rxbuf));
card->u.c.rxmb_off += sizeof(rxbuf);
if (card->u.c.rxmb_off > card->u.c.rxbuf_last_off){
card->u.c.rxmb_off = card->u.c.rxbuf_base_off;
}
}
/*============================================================================
* 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;
private_area_t *chan = NULL;
dev = WAN_DEVLE2DEV(WAN_LIST_FIRST(&card->wandev.dev_head));
if (!dev){
return;
}
if (!(chan = dev->priv)){
return;
}
/* TE timer interrupt */
if (card->u.c.timer_int_enabled & TMR_INT_ENABLED_TE) {
card->wandev.fe_iface.polling(&card->fe);
card->u.c.timer_int_enabled &= ~TMR_INT_ENABLED_TE;
}
if (card->u.c.timer_int_enabled & TMR_INT_ENABLED_CONFIG) {
config_chdlc(card);
card->u.c.timer_int_enabled &= ~TMR_INT_ENABLED_CONFIG;
}
/* process a udp call if pending */
if(card->u.c.timer_int_enabled & TMR_INT_ENABLED_UDP) {
process_udp_mgmt_pkt(card, dev,
chan,0);
card->u.c.timer_int_enabled &= ~TMR_INT_ENABLED_UDP;
}
/* only disable the timer interrupt if there are no udp or statistic */
/* updates pending */
if(!card->u.c.timer_int_enabled) {
card->hw_iface.clear_bit(card->hw, card->intr_perm_off, APP_INT_ON_TIMER);
}
}
/*-----------------------------------------------------------------------------
set_asy_config() used to set asynchronous configuration options on the board
------------------------------------------------------------------------------*/
static int set_asy_config(sdla_t* card)
{
ASY_CONFIGURATION_STRUCT cfg;
wan_mbox_t *mb = &card->wan_mbox;
int err;
memset(&cfg, 0, sizeof(ASY_CONFIGURATION_STRUCT));
if(card->wandev.clocking)
cfg.baud_rate = card->wandev.bps;
cfg.line_config_options = (card->wandev.interface == WANOPT_RS232) ?
INTERFACE_LEVEL_RS232 : INTERFACE_LEVEL_V35;
cfg.modem_config_options = 0;
cfg.asy_API_options = card->u.c.api_options;
cfg.asy_protocol_options = card->u.c.protocol_options;
cfg.Tx_bits_per_char = card->u.c.tx_bits_per_char;
cfg.Rx_bits_per_char = card->u.c.rx_bits_per_char;
cfg.stop_bits = card->u.c.stop_bits;
cfg.parity = card->u.c.parity;
cfg.break_timer = card->u.c.break_timer;
cfg.asy_Rx_inter_char_timer = card->u.c.inter_char_timer;
cfg.asy_Rx_complete_length = card->u.c.rx_complete_length;
cfg.XON_char = card->u.c.xon_char;
cfg.XOFF_char = card->u.c.xoff_char;
cfg.asy_statistics_options = (CHDLC_TX_DATA_BYTE_COUNT_STAT |
CHDLC_RX_DATA_BYTE_COUNT_STAT);
mb->wan_data_len = sizeof(ASY_CONFIGURATION_STRUCT);
memcpy(mb->wan_data, &cfg, mb->wan_data_len);
mb->wan_command = SET_ASY_CONFIGURATION;
err = card->hw_iface.cmd(card->hw, card->mbox_off, mb);
if (err != COMMAND_OK)
chdlc_error (card, err, mb);
if (err == 0x4F){
DEBUG_EVENT("%s: Error: ASYNC Not Supported by Firmware!\n",
card->devname);
}
return err;
}
/*============================================================================
* Enable asynchronous communications.
*/
static int asy_comm_enable (sdla_t* card)
{
netdevice_t *dev;
int err;
wan_mbox_t *mb = &card->wan_mbox;
dev = WAN_DEVLE2DEV(WAN_LIST_FIRST(&card->wandev.dev_head));
if (dev == NULL){
return -EINVAL;
}
mb->wan_data_len = 0;
mb->wan_command = ENABLE_ASY_COMMUNICATIONS;
err = card->hw_iface.cmd(card->hw, card->mbox_off, mb);
if (err != COMMAND_OK && dev)
chdlc_error(card, err, mb);
if (!err)
card->u.c.comm_enabled = 1;
return err;
}
/*------------------------------------------------------------------------------
Miscellaneous Functions
- set_chdlc_config() used to set configuration options on the board
------------------------------------------------------------------------------*/
static int set_chdlc_config(sdla_t* card)
{
CHDLC_CONFIGURATION_STRUCT cfg;
memset(&cfg, 0, sizeof(CHDLC_CONFIGURATION_STRUCT));
if(card->wandev.clocking)
cfg.baud_rate = card->wandev.bps;
cfg.line_config_options = (card->wandev.interface == WANOPT_RS232) ?
INTERFACE_LEVEL_RS232 : INTERFACE_LEVEL_V35;
cfg.modem_config_options = 0;
//API OPTIONS
cfg.CHDLC_API_options = 0;
cfg.modem_status_timer = 100;
cfg.CHDLC_protocol_options = card->u.c.protocol_options | HDLC_STREAMING_MODE;
cfg.percent_data_buffer_for_Tx = 50;
cfg.CHDLC_statistics_options = (CHDLC_TX_DATA_BYTE_COUNT_STAT |
CHDLC_RX_DATA_BYTE_COUNT_STAT);
cfg.max_CHDLC_data_field_length = card->wandev.mtu+CRC_LENGTH;
cfg.transmit_keepalive_timer = 0;
cfg.receive_keepalive_timer = 0;
cfg.keepalive_error_tolerance = 0;
cfg.SLARP_request_timer = 0;
cfg.IP_address = 0;
cfg.IP_netmask = 0;
return chdlc_configure(card, &cfg);
}
/*============================================================================
* Process global exception condition
*/
static int process_global_exception(sdla_t *card)
{
wan_mbox_t* mb = &card->wan_mbox;
int err;
mb->wan_data_len = 0;
mb->wan_command = READ_GLOBAL_EXCEPTION_CONDITION;
err = card->hw_iface.cmd(card->hw, card->mbox_off, mb);
if(err != CMD_TIMEOUT ){
switch(mb->wan_return_code) {
case EXCEP_MODEM_STATUS_CHANGE:
if (IS_56K_CARD(card)) {
FRONT_END_STATUS_STRUCT FE_status;
card->hw_iface.peek(card->hw,
card->fe_status_off,
&FE_status,
sizeof(FE_status));
card->fe.fe_param.k56_param.RR8_reg_56k =
FE_status.FE_U.stat_56k.RR8_56k;
card->fe.fe_param.k56_param.RRA_reg_56k =
FE_status.FE_U.stat_56k.RRA_56k;
card->fe.fe_param.k56_param.RRC_reg_56k =
FE_status.FE_U.stat_56k.RRC_56k;
card->wandev.fe_iface.read_alarm(&card->fe, 0);
handle_front_end_state(card);
break;
}
if (IS_TE1_CARD(card)) {
/* TE_INTR */
card->wandev.fe_iface.isr(&card->fe);
handle_front_end_state(card);
break;
}
if ((mb->wan_data[0] & (DCD_HIGH | CTS_HIGH)) == (DCD_HIGH | CTS_HIGH)){
card->fe.fe_status = FE_CONNECTED;
}else{
card->fe.fe_status = FE_DISCONNECTED;
}
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;
}
handle_front_end_state(card);
break;
case EXCEP_TRC_DISABLED:
printk(KERN_INFO "%s: Line trace disabled\n",
card->devname);
break;
case EXCEP_IRQ_TIMEOUT:
printk(KERN_INFO "%s: IRQ timeout occurred\n",
card->devname);
break;
default:
printk(KERN_INFO "%s: Global exception %x\n",
card->devname, mb->wan_return_code);
break;
}
}
return 0;
}
static void handle_front_end_state(void* card_id)
{
sdla_t* card = (sdla_t*)card_id;
if (card->wandev.ignore_front_end_status == WANOPT_YES){
return;
}
if (card->fe.fe_status == FE_CONNECTED){
if (card->u.c.state == WAN_CONNECTED){
port_set_state(card,WAN_CONNECTED);
}
}else{
if (!IS_56K_CARD(card)) {
netdevice_t *dev;
dev = WAN_DEVLE2DEV(WAN_LIST_FIRST(&card->wandev.dev_head));
send_ppp_term_request(dev);
port_set_state(card,WAN_DISCONNECTED);
} else {
card->wandev.state = WAN_DISCONNECTED;
}
}
}
/*============================================================================
* Process chdlc exception condition
*/
static int process_chdlc_exception(sdla_t *card)
{
wan_mbox_t* mb = &card->wan_mbox;
int err;
mb->wan_data_len = 0;
mb->wan_command = READ_CHDLC_EXCEPTION_CONDITION;
err = card->hw_iface.cmd(card->hw, card->mbox_off, mb);
if(err != CMD_TIMEOUT) {
switch (err) {
case EXCEP_LINK_ACTIVE:
card->u.c.state = WAN_CONNECTED;
DEBUG_EVENT("%s: Exception condition: Link active!\n",
card->devname);
if (IS_56K_CARD(card)) {
port_set_state(card, WAN_CONNECTED);
if (card->fe.fe_status != FE_CONNECTED) {
card->wandev.state = WAN_DISCONNECTED;
}
} else {
if (card->wandev.ignore_front_end_status == WANOPT_YES ||
card->fe.fe_status == FE_CONNECTED){
port_set_state(card, WAN_CONNECTED);
}
}
break;
case EXCEP_LINK_INACTIVE_MODEM:
DEBUG_EVENT("%s: Exception condition: Link In-active!\n",
card->devname);
card->u.c.state = WAN_DISCONNECTED;
port_set_state(card, WAN_DISCONNECTED);
break;
case EXCEP_LOOPBACK_CONDITION:
printk(KERN_INFO "%s: Loopback Condition Detected.\n",
card->devname);
break;
case NO_CHDLC_EXCEP_COND_TO_REPORT:
printk(KERN_INFO "%s: No exceptions reported.\n",
card->devname);
break;
default:
printk(KERN_INFO "%s: Exception Condition %x!\n",
card->devname,err);
break;
}
}
return 0;
}
/*=============================================================================
* Store a UDP management packet for later processing.
*/
static int store_udp_mgmt_pkt(char udp_pkt_src, sdla_t* card,
struct sk_buff *skb, netdevice_t* dev,
private_area_t* chan )
{
int udp_pkt_stored = 0;
if(!atomic_read(&chan->udp_pkt_len) &&
(skb->len <= MAX_LGTH_UDP_MGNT_PKT)) {
atomic_set(&chan->udp_pkt_len, skb->len);
chan->udp_pkt_src = udp_pkt_src;
memcpy(chan->udp_pkt_data, skb->data+4, skb->len-4);
card->u.c.timer_int_enabled = TMR_INT_ENABLED_UDP;
udp_pkt_stored = 1;
}
wan_skb_free(skb);
return(udp_pkt_stored);
}
/**
* 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)
{
private_area_t* chan= (private_area_t*)dev->priv;
unsigned long smp_flags;
sdla_t *card;
int err=-EINVAL;
wan_udp_pkt_t *wan_udp_pkt;
if (!chan){
return -ENODEV;
}
card=chan->card;
switch(cmd)
{
case SIOC_WANPIPE_BIND_SK:
if (!ifr){
err= -EINVAL;
break;
}
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;
}
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_CHECK_TX:
case SIOC_ANNEXG_CHECK_TX:
err=0;
break;
case SIOC_WANPIPE_DEV_STATE:
err = chan->common.state;
break;
case SIOC_ANNEXG_KICK:
err=0;
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 (wan_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;
}
if (wan_udp_pkt->wan_udp_command == DIGITAL_LOOPTEST) {
process_udp_mgmt_pkt(card,dev,chan,1);
} else {
spin_lock_irqsave(&card->wandev.lock, smp_flags);
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;
default:
if (chan->common.prot_ptr){
return wp_sppp_do_ioctl(dev,ifr,cmd);
}
return -EINVAL;
}
return err;
}
/*=============================================================================
* Process UDP management packet.
*/
static int process_udp_mgmt_pkt(sdla_t* card, netdevice_t* dev,
private_area_t* chan, int local_dev )
{
unsigned char *buf;
unsigned int len;
struct sk_buff *new_skb;
unsigned short buffer_length;
int udp_mgmt_req_valid = 1;
wan_mbox_t *mb = &card->wan_mbox;
SHARED_MEMORY_INFO_STRUCT flags;
wan_udp_pkt_t *wan_udp_pkt;
struct timeval tv;
int err;
netskb_t *skb;
wan_udp_pkt = (wan_udp_pkt_t *) chan->udp_pkt_data;
if (!local_dev){
if(chan->udp_pkt_src == UDP_PKT_FRM_NETWORK){
/* Only these commands are support for remote debugging.
* All others are not */
switch(wan_udp_pkt->wan_udp_command) {
case READ_GLOBAL_STATISTICS:
case READ_MODEM_STATUS:
case READ_CHDLC_LINK_STATUS:
case CPIPE_ROUTER_UP_TIME:
case READ_COMMS_ERROR_STATS:
case READ_CHDLC_OPERATIONAL_STATS:
/* These two commands are executed for
* each request */
case READ_CHDLC_CONFIGURATION:
case READ_CHDLC_CODE_VERSION:
case WAN_GET_MEDIA_TYPE:
case WAN_FE_GET_CFG:
case WAN_FE_GET_STAT:
case WAN_GET_PROTOCOL:
case WAN_GET_PLATFORM:
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 {
wan_udp_hdr_t* udp_hdr = &wan_udp_pkt->wan_udp_hdr;
wan_trace_t *trace_info = &chan->trace_info;
wan_udp_pkt->wan_udp_opp_flag = 0;
switch(wan_udp_pkt->wan_udp_command) {
case DIGITAL_LOOPTEST:
wan_udp_pkt->wan_udp_return_code =
digital_loop_test(card,wan_udp_pkt);
break;
case CPIPE_ENABLE_TRACING:
udp_hdr->wan_udphdr_return_code = WAN_CMD_OK;
udp_hdr->wan_udphdr_data_len = 0;
if (!wan_test_bit(0,&trace_info->tracing_enabled)){
trace_info->trace_timeout = SYSTEM_TICKS;
wan_trace_purge(trace_info);
DEBUG_UDP("%s: Traceing enabled!\n",
card->devname);
wan_set_bit (0,&trace_info->tracing_enabled);
}else{
DEBUG_EVENT("%s: Error: Trace running!\n",
card->devname);
udp_hdr->wan_udphdr_return_code = 2;
}
break;
case CPIPE_DISABLE_TRACING:
udp_hdr->wan_udphdr_return_code = WAN_CMD_OK;
if(wan_test_bit(0,&trace_info->tracing_enabled)) {
wan_clear_bit(0,&trace_info->tracing_enabled);
wan_trace_purge(trace_info);
DEBUG_UDP("%s: Disabling ADSL trace\n",
card->devname);
}else{
/* set return code to line trace already
disabled */
udp_hdr->wan_udphdr_return_code = 1;
}
break;
case CPIPE_GET_TRACE_INFO:
if(wan_test_bit(0,&trace_info->tracing_enabled)){
trace_info->trace_timeout = SYSTEM_TICKS;
}else{
DEBUG_EVENT("%s: Error trace not enabled\n",
card->devname);
/* set return code */
udp_hdr->wan_udphdr_return_code = 1;
break;
}
buffer_length = 0;
udp_hdr->wan_udphdr_chdlc_num_frames = 0;
udp_hdr->wan_udphdr_chdlc_ismoredata = 0;
#if defined(__FreeBSD__) || defined(__OpenBSD__)
while (wan_trace_queue_len(trace_info)){
WAN_IFQ_POLL(&trace_info->trace_queue, skb);
if (skb == NULL){
DEBUG_EVENT("%s: No more trace packets in trace queue!\n",
card->devname);
break;
}
if ((WAN_MAX_DATA_SIZE - buffer_length) < skb->m_pkthdr.len){
/* indicate there are more frames on board & exit */
udp_hdr->wan_udphdr_chdlc_ismoredata = 0x01;
break;
}
m_copydata(skb,
0,
skb->m_pkthdr.len,
&udp_hdr->wan_udphdr_data[buffer_length]);
buffer_length += skb->m_pkthdr.len;
WAN_IFQ_DEQUEUE(&trace_info->trace_queue, skb);
if (skb){
m_freem(skb);
}
udp_hdr->wan_udphdr_chdlc_num_frames++;
}
#elif defined(__LINUX__)
while ((skb=skb_dequeue(&trace_info->trace_queue)) != NULL){
if((MAX_TRACE_BUFFER - buffer_length) < wan_skb_len(skb)){
/* indicate there are more frames on board & exit */
udp_hdr->wan_udphdr_chdlc_ismoredata = 0x01;
if (buffer_length != 0){
wan_skb_queue_head(&trace_info->trace_queue, skb);
}else{
/* If rx buffer length is greater than the
* whole udp buffer copy only the trace
* header and drop the trace packet */
memcpy(&udp_hdr->wan_udphdr_chdlc_data[buffer_length],
wan_skb_data(skb),
sizeof(wan_trace_pkt_t));
buffer_length = sizeof(wan_trace_pkt_t);
udp_hdr->wan_udphdr_chdlc_num_frames++;
wan_skb_free(skb);
}
break;
}
memcpy(&udp_hdr->wan_udphdr_chdlc_data[buffer_length],
wan_skb_data(skb),
wan_skb_len(skb));
buffer_length += wan_skb_len(skb);
wan_skb_free(skb);
udp_hdr->wan_udphdr_chdlc_num_frames++;
}
#endif
/* set the data length and return code */
udp_hdr->wan_udphdr_data_len = buffer_length;
udp_hdr->wan_udphdr_return_code = WAN_CMD_OK;
break;
case CPIPE_FT1_READ_STATUS:
card->hw_iface.peek(card->hw, card->flags_off, &flags, sizeof(flags));
((unsigned char *)wan_udp_pkt->wan_udp_data )[0] =
flags.FT1_info_struct.parallel_port_A_input;
((unsigned char *)wan_udp_pkt->wan_udp_data )[1] =
flags.FT1_info_struct.parallel_port_B_input;
wan_udp_pkt->wan_udp_return_code = COMMAND_OK;
wan_udp_pkt->wan_udp_data_len = 2;
mb->wan_data_len = 2;
break;
case CPIPE_ROUTER_UP_TIME:
do_gettimeofday( &tv );
chan->router_up_time = tv.tv_sec -
chan->router_start_time;
*(u_int32_t *)&wan_udp_pkt->wan_udp_data =
chan->router_up_time;
mb->wan_data_len = sizeof(u_int32_t);
wan_udp_pkt->wan_udp_data_len = sizeof(u_int32_t);
wan_udp_pkt->wan_udp_return_code = COMMAND_OK;
break;
case FT1_MONITOR_STATUS_CTRL:
/* Enable FT1 MONITOR STATUS */
if ((wan_udp_pkt->wan_udp_data[0] & ENABLE_READ_FT1_STATUS) ||
(wan_udp_pkt->wan_udp_data[0] & ENABLE_READ_FT1_OP_STATS)) {
if( rCount++ != 0 ) {
wan_udp_pkt->wan_udp_return_code = COMMAND_OK;
mb->wan_data_len = 1;
break;
}
}
/* Disable FT1 MONITOR STATUS */
if( wan_udp_pkt->wan_udp_data[0] == 0) {
if( --rCount != 0) {
wan_udp_pkt->wan_udp_return_code = COMMAND_OK;
mb->wan_data_len = 1;
break;
}
}
goto dflt_1;
case WAN_GET_MEDIA_TYPE:
case WAN_FE_GET_STAT:
case WAN_FE_SET_LB_MODE:
case WAN_FE_FLUSH_PMON:
case WAN_FE_GET_CFG:
if (IS_TE1_CARD(card)){
card->wandev.fe_iface.process_udp(
&card->fe,
&wan_udp_pkt->wan_udp_cmd,
&wan_udp_pkt->wan_udp_data[0]);
}else if (IS_56K_CARD(card)){
card->wandev.fe_iface.process_udp(
&card->fe,
&wan_udp_pkt->wan_udp_cmd,
&wan_udp_pkt->wan_udp_data[0]);
}else{
if (wan_udp_pkt->wan_udp_command == WAN_GET_MEDIA_TYPE){
wan_udp_pkt->wan_udp_data_len = sizeof(unsigned char);
wan_udp_pkt->wan_udp_return_code = CMD_OK;
}else{
wan_udp_pkt->wan_udp_return_code = WAN_UDP_INVALID_CMD;
}
}
mb->wan_data_len = wan_udp_pkt->wan_udp_data_len;
break;
case WAN_GET_PROTOCOL:
wan_udp_pkt->wan_udp_chdlc_num_frames = WANCONFIG_CHDLC;
wan_udp_pkt->wan_udp_return_code = CMD_OK;
mb->wan_data_len = wan_udp_pkt->wan_udp_data_len = 1;
break;
case WAN_GET_PLATFORM:
wan_udp_pkt->wan_udp_data[0] = WAN_LINUX_PLATFORM;
wan_udp_pkt->wan_udp_return_code = CMD_OK;
mb->wan_data_len = wan_udp_pkt->wan_udp_data_len = 1;
break;
case WAN_GET_MASTER_DEV_NAME:
wan_udp_pkt->wan_udp_data_len = 0;
wan_udp_pkt->wan_udp_return_code = 0xCD;
break;
default:
dflt_1:
/* 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){
wan_udp_pkt->wan_udp_request_reply = UDPMGMT_REPLY;
return 1;
}
len = wan_reply_udp(card,chan->udp_pkt_data, mb->wan_data_len);
if(chan->udp_pkt_src == UDP_PKT_FRM_NETWORK){
/* Must check if we interrupted if_send() routine. The
* tx buffers might be used. If so drop the packet */
if (!wan_test_bit(SEND_CRIT,&card->wandev.critical)) {
if(!chdlc_send(card, chan->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, chan->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);
}
}
atomic_set(&chan->udp_pkt_len,0);
return 0;
}
/*============================================================================
* Initialize Receive and Transmit Buffers.
*/
static void init_chdlc_tx_rx_buff( sdla_t* card, netdevice_t *dev )
{
wan_mbox_t* mb = &card->wan_mbox;
unsigned long tx_config_off;
unsigned long rx_config_off;
CHDLC_TX_STATUS_EL_CFG_STRUCT tx_config;
CHDLC_RX_STATUS_EL_CFG_STRUCT rx_config;
char err;
mb->wan_data_len = 0;
mb->wan_command = READ_CHDLC_CONFIGURATION;
err = card->hw_iface.cmd(card->hw, card->mbox_off, mb);
if(err != COMMAND_OK) {
chdlc_error(card,err,mb);
return;
}
/* Alex Apr 8 2004 Sangoma ISA card */
tx_config_off =
((CHDLC_CONFIGURATION_STRUCT *)mb->wan_data)->
ptr_CHDLC_Tx_stat_el_cfg_struct;
rx_config_off =
((CHDLC_CONFIGURATION_STRUCT *)mb->wan_data)->
ptr_CHDLC_Rx_stat_el_cfg_struct;
/* Setup Head and Tails for buffers */
card->hw_iface.peek(card->hw, tx_config_off, &tx_config, sizeof(tx_config));
card->u.c.txbuf_base_off =
tx_config.base_addr_Tx_status_elements;
card->u.c.txbuf_last_off =
card->u.c.txbuf_base_off +
(tx_config.number_Tx_status_elements - 1) *
sizeof(CHDLC_DATA_TX_STATUS_EL_STRUCT);
card->hw_iface.peek(card->hw, rx_config_off, &rx_config, sizeof(rx_config));
card->u.c.rxbuf_base_off =
rx_config.base_addr_Rx_status_elements;
card->u.c.rxbuf_last_off =
card->u.c.rxbuf_base_off +
(rx_config.number_Rx_status_elements - 1) *
sizeof(CHDLC_DATA_RX_STATUS_EL_STRUCT);
/* Set up next pointer to be used */
card->u.c.txbuf_off =
tx_config.next_Tx_status_element_to_use;
card->u.c.rxmb_off =
rx_config.next_Rx_status_element_to_use;
/* Setup Actual Buffer Start and end addresses */
card->u.c.rx_base_off = rx_config.base_addr_Rx_buffer;
card->u.c.rx_top_off = rx_config.end_addr_Rx_buffer;
}
/*=============================================================================
* 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 = chdlc_set_intr_mode(card, APP_INT_ON_COMMAND_COMPLETE);
if (err == CMD_OK) {
for (i = 0; i < MAX_INTR_TEST_COUNTER; i ++) {
memset(mb,0,sizeof(wan_mbox_t));
mb->wan_data_len = 0;
mb->wan_command = READ_CHDLC_CODE_VERSION;
err = card->hw_iface.cmd(card->hw, card->mbox_off, mb);
if (err != CMD_OK)
chdlc_error(card, err, mb);
udelay(10000);
schedule();
}
}else{
return err;
}
card->hw_iface.poke_byte(card->hw, card->intr_type_off, 0x00);
err = chdlc_set_intr_mode(card, 0);
if (err != CMD_OK)
return err;
return 0;
}
/*==============================================================================
* Determine what type of UDP call it is. CPIPEAB ?
*/
static int udp_pkt_type(struct sk_buff *skb, sdla_t* card)
{
wan_udp_pkt_t *wan_udp_pkt = (wan_udp_pkt_t *)(skb->data+4);
if (skb->len < sizeof(wan_udp_pkt_t)){
return UDP_INVALID_TYPE;
}
#ifdef _WAN_UDP_DEBUG
printk(KERN_INFO "SIG %s = %s\n\
UPP %x = %x\n\
PRT %x = %x\n\
REQ %i = %i\n\
36 th = %x 37th = %x\n",
wan_udp_pkt->wan_udp_signature,
UDPMGMT_SIGNATURE,
wan_udp_pkt->wan_udp_dport,
ntohs(card->wandev.udp_port),
wan_udp_pkt->wan_ip_p,
UDPMGMT_UDP_PROTOCOL,
wan_udp_pkt->wan_udp_request_reply,
UDPMGMT_REQUEST,
skb->data[36], skb->data[37]);
#endif
if ((wan_udp_pkt->wan_udp_dport == ntohs(card->wandev.udp_port)) &&
(wan_udp_pkt->wan_ip_p == UDPMGMT_UDP_PROTOCOL) &&
(wan_udp_pkt->wan_udp_request_reply == UDPMGMT_REQUEST)) {
if (!strncmp(wan_udp_pkt->wan_udp_signature,UDPMGMT_SIGNATURE,8)){
return UDP_CPIPE_TYPE;
}
if (!strncmp(wan_udp_pkt->wan_udp_signature,GLOBAL_UDP_SIGNATURE,8)){
return UDP_CPIPE_TYPE;
}
}
return UDP_INVALID_TYPE;
}
/*============================================================================
* Set PORT state.
*/
static void port_set_state (sdla_t *card, int state)
{
netdevice_t *dev;
private_area_t *chan;
dev = WAN_DEVLE2DEV(WAN_LIST_FIRST(&card->wandev.dev_head));
if (!dev || !dev->priv){
return;
}
chan=dev->priv;
if (card->wandev.state != state)
{
switch (state)
{
case WAN_CONNECTED:
printk (KERN_INFO "%s: HDLC link connected!\n",
card->devname);
WAN_NETIF_WAKE_QUEUE(dev);
WAN_NETIF_CARRIER_ON(dev);
#ifdef CONFIG_PRODUCT_WANPIPE_ANNEXG
if (chan->common.usedby == ANNEXG &&
chan->annexg_dev){
if (IS_FUNC_CALL(lapb_protocol,lapb_link_up)){
lapb_protocol.lapb_link_up(chan->annexg_dev);
}
}
#endif
if (chan->common.usedby == STACK){
wanpipe_lip_connect(chan,0);
break;
}
break;
case WAN_CONNECTING:
printk (KERN_INFO "%s: HDLC link connecting...\n",
card->devname);
WAN_NETIF_STOP_QUEUE(dev);
WAN_NETIF_CARRIER_OFF(dev);
break;
case WAN_DISCONNECTED:
printk (KERN_INFO "%s: HDLC link disconnected!\n",
card->devname);
WAN_NETIF_STOP_QUEUE(dev);
WAN_NETIF_CARRIER_OFF(dev);
#ifdef CONFIG_PRODUCT_WANPIPE_ANNEXG
if (chan->common.usedby == ANNEXG &&
chan->annexg_dev){
if (IS_FUNC_CALL(lapb_protocol,lapb_link_down))
lapb_protocol.lapb_link_down(chan->annexg_dev);
break;
}
#endif
if (chan->common.usedby == STACK){
wanpipe_lip_disconnect(chan,0);
break;
}
break;
}
card->wandev.state = state;
chan->common.state = state;
}
}
void s508_lock (sdla_t *card, unsigned long *smp_flags)
{
spin_lock_irqsave(&card->wandev.lock, *smp_flags);
if (card->next){
/* It is ok to use spin_lock here, since we
* already turned off interrupts */
spin_lock(&card->next->wandev.lock);
}
}
void s508_unlock (sdla_t *card, unsigned long *smp_flags)
{
if (card->next){
spin_unlock(&card->next->wandev.lock);
}
spin_unlock_irqrestore(&card->wandev.lock, *smp_flags);
}
/*===========================================================================
* config_chdlc
*
* 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_chdlc (sdla_t *card)
{
netdevice_t *dev;
dev = WAN_DEVLE2DEV(WAN_LIST_FIRST(&card->wandev.dev_head));
if (card->u.c.comm_enabled){
chdlc_comm_disable(card);
port_set_state(card, WAN_DISCONNECTED);
}
/* Setup the Board for asynchronous mode */
if (card->u.c.async_mode){
if (set_asy_config(card)) {
printk (KERN_INFO "%s: Failed Async configuration!\n",
card->devname);
port_set_state(card, WAN_DISCONNECTED);
return -EINVAL;
}
}else{
if (set_chdlc_config(card)) {
printk(KERN_INFO "%s: HDLC Configuration Failed!\n",
card->devname);
port_set_state(card, WAN_DISCONNECTED);
return -EINVAL;
}
}
card->hw_iface.poke_byte(card->hw, card->intr_type_off, 0x00);
card->hw_iface.poke_byte(card->hw, card->intr_perm_off, 0x00);
if (IS_TE1_CARD(card)) {
int err = -EINVAL;
printk(KERN_INFO "%s: Configuring onboard %s CSU/DSU\n",
card->devname,
(IS_T1_CARD(card))?"T1":"E1");
if (card->wandev.fe_iface.config){
err = card->wandev.fe_iface.config(&card->fe);
}
if (err){
printk(KERN_INFO "%s: Failed %s configuratoin!\n",
card->devname,
(IS_T1_CARD(card))?"T1":"E1");
return -EINVAL;
}
}
if (IS_56K_CARD(card)) {
int err = -EINVAL;
printk(KERN_INFO "%s: Configuring 56K onboard CSU/DSU\n",
card->devname);
if (card->wandev.fe_iface.config){
err = card->wandev.fe_iface.config(&card->fe);
}
if(err){
printk (KERN_INFO "%s: Failed 56K configuration!\n",
card->devname);
return -EINVAL;
}
}
/* Set interrupt mode and mask */
if (chdlc_set_intr_mode(card, APP_INT_ON_RX_FRAME |
APP_INT_ON_GLOBAL_EXCEP_COND |
APP_INT_ON_TX_FRAME |
APP_INT_ON_CHDLC_EXCEP_COND | APP_INT_ON_TIMER)){
printk (KERN_INFO "%s: Failed to set interrupt triggers!\n",
card->devname);
return 0;
}
/* Mask All interrupts */
card->hw_iface.clear_bit(card->hw, card->intr_perm_off,
(APP_INT_ON_RX_FRAME | APP_INT_ON_TX_FRAME |
APP_INT_ON_TIMER | APP_INT_ON_GLOBAL_EXCEP_COND |
APP_INT_ON_CHDLC_EXCEP_COND));
init_chdlc_tx_rx_buff(card, dev);
if (card->u.c.async_mode){
if (asy_comm_enable(card) != 0) {
printk(KERN_INFO "%s: Failed to enable async commnunication!\n",
card->devname);
card->hw_iface.poke_byte(card->hw, card->intr_perm_off, 0x00);
card->u.c.comm_enabled=0;
chdlc_set_intr_mode(card,0);
port_set_state(card, WAN_DISCONNECTED);
return 0;
}
}else{
if (chdlc_comm_enable(card) != 0) {
printk(KERN_INFO "%s: Failed to enable chdlc communications!\n",
card->devname);
card->hw_iface.poke_byte(card->hw, card->intr_perm_off, 0x00);
card->u.c.comm_enabled=0;
chdlc_set_intr_mode(card,0);
port_set_state(card, WAN_DISCONNECTED);
return 0;
}
}
/* Initialize Rx/Tx buffer control fields */
init_chdlc_tx_rx_buff(card, dev);
card->u.c.state = WAN_CONNECTING;
port_set_state(card, WAN_CONNECTING);
/* Manually poll the 56K CSU/DSU to get the status */
if (IS_56K_CARD(card)) {
/* 56K Update CSU/DSU alarms */
card->wandev.fe_iface.read_alarm(&card->fe, 1);
}
/* Unmask all interrupts except the Transmit and Timer interrupts */
card->hw_iface.set_bit(card->hw, card->intr_perm_off,
(APP_INT_ON_RX_FRAME | APP_INT_ON_GLOBAL_EXCEP_COND |
APP_INT_ON_CHDLC_EXCEP_COND));
card->hw_iface.poke_byte(card->hw, card->intr_type_off, 0);
return 0;
}
static void send_ppp_term_request (netdevice_t *dev)
{
struct sk_buff *new_skb;
unsigned char *buf;
private_area_t *chan=dev->priv;
if (!chan->common.prot_ptr){
return;
}
if (chan->ignore_modem)
return;
if ((new_skb = dev_alloc_skb(8)) != NULL) {
/* copy data into new_skb */
buf = skb_put(new_skb, 8);
sprintf(buf,"%c%c%c%c%c%c%c%c", 0xFF,0x03,0xC0,0x21,0x05,0x98,0x00,0x07);
/* Decapsulate pkt and pass it up the protocol stack */
new_skb->protocol = htons(ETH_P_WAN_PPP);
new_skb->dev = dev;
wan_skb_reset_mac_header(new_skb);
wan_skb_queue_tail(&chan->rx_queue,new_skb);
WAN_TASKLET_SCHEDULE((&chan->tasklet));
}
}
/*
* ******************************************************************
* 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)
{
private_area_t* chan = priv;
sdla_t* card = NULL;
if (chan == NULL)
return m->count;
card = chan->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.c.if_name, card->devname);
return m->count;
}
static int chdlc_get_status_info(void* priv, struct seq_file* m, int* stop_cnt)
{
private_area_t* chan = priv;
sdla_t* card = NULL;
if (chan == NULL)
return m->count;
card = chan->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.c.if_name, card->devname, STATE_DECODE(chan->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;
private_area_t* chan = NULL;
sdla_t* card = NULL;
if (dev == NULL || dev->priv == NULL)
return count;
chan = (private_area_t*)dev->priv;
if (chan->card == NULL)
return count;
card = chan->card;
printk(KERN_INFO "%s: New interface config (%s)\n",
card->u.c.if_name, buffer);
/* Parse string */
return count;
}
static int set_adapter_config (sdla_t* card)
{
wan_mbox_t* mb = &card->wan_mbox;
ADAPTER_CONFIGURATION_STRUCT* cfg = (ADAPTER_CONFIGURATION_STRUCT*)mb->wan_data;
int err;
card->hw_iface.getcfg(card->hw, SDLA_ADAPTERTYPE, &cfg->adapter_type);
cfg->adapter_config = 0x00;
cfg->operating_frequency = 00;
mb->wan_data_len = sizeof(ADAPTER_CONFIGURATION_STRUCT);
mb->wan_command = SET_ADAPTER_CONFIGURATION;
err = card->hw_iface.cmd(card->hw, card->mbox_off, mb);
if(err != COMMAND_OK) {
chdlc_error(card,err,mb);
}
return (err);
}
/*============================================================================
* Enable timer interrupt
*/
static void chdlc_enable_timer (void* card_id)
{
sdla_t* card = (sdla_t*)card_id;
card->u.c.timer_int_enabled |= TMR_INT_ENABLED_TE;
card->hw_iface.set_bit(card->hw, card->intr_perm_off, APP_INT_ON_TIMER);
return;
}
/**SECTION**************************************************
*
* Bottom Half Handlers
*
**********************************************************/
static void wp_bh (unsigned long data)
{
private_area_t *chan = (private_area_t *)data;
sdla_t *card = chan->card;
netskb_t *skb;
int len;
if (wan_test_bit(PERI_CRIT, (void*)&card->wandev.critical)){
DEBUG_EVENT("%s: WpBH PERI Critical\n",
card->devname);
WAN_TASKLET_END((&chan->tasklet));
return;
}
if (!WAN_NETIF_UP(chan->dev)){
DEBUG_EVENT("%s: WpBH Dev done\n",
card->devname);
WAN_TASKLET_END((&chan->tasklet));
return;
}
while ((skb=wan_skb_dequeue(&chan->rx_queue))){
len=skb->len;
if (chan->common.usedby == WANPIPE){
card->wandev.stats.rx_packets ++;
card->wandev.stats.rx_bytes += skb->len;
wp_sppp_input(skb->dev,skb);
}else if (chan->common.usedby == API){
if (wan_skb_headroom(skb) >= sizeof(api_rx_hdr_t)){
api_rx_hdr_t *rx_hdr=
(api_rx_hdr_t*)wan_skb_push(skb,sizeof(api_rx_hdr_t));
memset(rx_hdr,0,sizeof(api_rx_hdr_t));
}else{
if (WAN_NET_RATELIMIT()){
DEBUG_EVENT("%s: Error Rx pkt headroom %d < %u\n",
chan->if_name,
wan_skb_headroom(skb),
sizeof(api_rx_hdr_t));
}
++card->wandev.stats.rx_dropped;
wan_skb_free(skb);
continue;
}
skb->protocol = htons(PVC_PROT);
wan_skb_reset_mac_header(skb);
skb->dev = chan->common.dev;
skb->pkt_type = WAN_PACKET_DATA;
if (wan_api_rx(chan,skb) == 0){
card->wandev.stats.rx_packets++;
card->wandev.stats.rx_bytes += len;
}else{
++card->wandev.stats.rx_dropped;
wan_skb_free(skb);
}
}else if (chan->common.usedby == STACK){
if (wanpipe_lip_rx(chan,skb) != 0){
++card->wandev.stats.rx_dropped;
wan_skb_free(skb);
}else{
card->wandev.stats.rx_packets++;
card->wandev.stats.rx_bytes += len;
}
}else{
#ifdef CONFIG_PRODUCT_WANPIPE_ANNEXG
if (chan->annexg_dev){
if (IS_FUNC_CALL(lapb_protocol,lapb_rx)){
lapb_protocol.lapb_rx(chan->annexg_dev,skb);
card->wandev.stats.rx_packets++;
card->wandev.stats.rx_bytes += len;
}else{
wan_skb_free(skb);
++card->wandev.stats.rx_dropped;
}
}else{
wan_skb_free(skb);
++card->wandev.stats.rx_dropped;
}
#else
wan_skb_free(skb);
++card->wandev.stats.rx_dropped;
#endif
}
}
WAN_TASKLET_END((&chan->tasklet));
return;
}
#ifdef CONFIG_PRODUCT_WANPIPE_ANNEXG
static int bind_annexg(netdevice_t *dev, netdevice_t *annexg_dev)
{
unsigned long smp_flags=0;
private_area_t* chan = dev->priv;
sdla_t *card = chan->card;
if (!chan)
return -EINVAL;
if (chan->common.usedby != ANNEXG)
return -EPROTONOSUPPORT;
if (chan->annexg_dev)
return -EBUSY;
spin_lock_irqsave(&card->wandev.lock,smp_flags);
chan->annexg_dev = annexg_dev;
spin_unlock_irqrestore(&card->wandev.lock,smp_flags);
return 0;
}
static netdevice_t * un_bind_annexg(wan_device_t *wandev, netdevice_t *annexg_dev)
{
struct wan_dev_le *devle;
netdevice_t *dev;
unsigned long smp_flags=0;
sdla_t *card = wandev->private;
WAN_LIST_FOREACH(devle, &card->wandev.dev_head, dev_link){
private_area_t* chan;
dev = WAN_DEVLE2DEV(devle);
if (dev == NULL || (chan = wan_netif_priv(dev)) == NULL)
continue;
if (!chan->annexg_dev || chan->common.usedby != ANNEXG)
continue;
if (chan->annexg_dev == annexg_dev){
spin_lock_irqsave(&card->wandev.lock,smp_flags);
chan->annexg_dev = NULL;
spin_unlock_irqrestore(&card->wandev.lock,smp_flags);
return dev;
}
}
return NULL;
}
static void get_active_inactive(wan_device_t *wandev, netdevice_t *dev,
void *wp_stats_ptr)
{
private_area_t* chan = dev->priv;
wp_stack_stats_t *wp_stats = (wp_stack_stats_t *)wp_stats_ptr;
if (chan->common.usedby == ANNEXG && chan->annexg_dev){
if (IS_FUNC_CALL(lapb_protocol,lapb_get_active_inactive)){
lapb_protocol.lapb_get_active_inactive(chan->annexg_dev,wp_stats);
}
}
if (chan->common.state == WAN_CONNECTED){
wp_stats->fr_active++;
}else{
wp_stats->fr_inactive++;
}
}
static int
get_map(wan_device_t *wandev, netdevice_t *dev, struct seq_file* m, int* stop_cnt)
{
private_area_t* chan = dev->priv;
if (!(dev->flags&IFF_UP)){
return m->count;
}
if (chan->common.usedby == ANNEXG && chan->annexg_dev){
if (IS_FUNC_CALL(lapb_protocol,lapb_get_map)){
return lapb_protocol.lapb_get_map(chan->annexg_dev,
m);
}
}
PROC_ADD_LINE(m,
"%15s:%s:%c:%s:%c\n",
chan->label,
wandev->name,(wandev->state == WAN_CONNECTED) ? '*' : ' ',
dev->name,(chan->common.state == WAN_CONNECTED) ? '*' : ' ');
return m->count;
}
#endif
static int digital_loop_test(sdla_t* card,wan_udp_pkt_t* wan_udp_pkt)
{
netskb_t* skb;
netdevice_t* dev;
char* buf;
private_area_t *chan;
dev = WAN_DEVLE2DEV(WAN_LIST_FIRST(&card->wandev.dev_head));
if (dev == NULL) {
return 1;
}
chan = wan_netif_priv(dev);
if (chan == NULL) {
return 1;
}
if (chan->common.state != WAN_CONNECTED) {
DEBUG_EVENT("%s: Loop test failed: dev not connected!\n",
card->devname);
return 2;
}
skb = wan_skb_alloc(wan_udp_pkt->wan_udp_data_len+100);
if (skb == NULL) {
return 3;
}
switch (chan->common.usedby) {
case API:
wan_skb_push(skb, sizeof(api_rx_hdr_t));
break;
case STACK:
case WANPIPE:
break;
default:
DEBUG_EVENT("%s: Loop test failed: invalid operation mode!\n",
card->devname);
wan_skb_free(skb);
return 4;
}
buf = wan_skb_put(skb, wan_udp_pkt->wan_udp_data_len);
memcpy(buf, wan_udp_pkt->wan_udp_data, wan_udp_pkt->wan_udp_data_len);
skb->next = skb->prev = NULL;
skb->dev = dev;
skb->protocol = htons(ETH_P_IP);
wan_skb_reset_mac_header(skb);
dev_queue_xmit(skb);
return 0;
}
/****** End ****************************************************************/
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