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path: root/drivers/net/wan/wanpipe_multppp.c
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-rw-r--r--drivers/net/wan/wanpipe_multppp.c2358
1 files changed, 0 insertions, 2358 deletions
diff --git a/drivers/net/wan/wanpipe_multppp.c b/drivers/net/wan/wanpipe_multppp.c
deleted file mode 100644
index 812a118..0000000
--- a/drivers/net/wan/wanpipe_multppp.c
+++ /dev/null
@@ -1,2358 +0,0 @@
-/*****************************************************************************
-* 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.
-* ============================================================================
-* Dec 15 2000 Updated for 2.4.X kernel
-* Nov 15 2000 Fixed the SyncPPP support for kernels 2.2.16 and higher.
-* The pppstruct has changed.
-* Jul 13 2000 Using the kernel Syncppp module on top of RAW Wanpipe CHDLC
-* module.
-*****************************************************************************/
-
-#include <linux/module.h>
-#include <linux/kernel.h> /* printk(), and other useful stuff */
-#include <linux/stddef.h> /* offsetof(), etc. */
-#include <linux/errno.h> /* return codes */
-#include <linux/string.h> /* inline memset(), etc. */
-#include <linux/slab.h> /* kmalloc(), kfree() */
-#include <linux/wanrouter.h> /* WAN router definitions */
-#include <linux/wanpipe.h> /* WANPIPE common user API definitions */
-#include <linux/if_arp.h> /* ARPHRD_* defines */
-#include <linux/jiffies.h> /* time_after() macro */
-
-#include <linux/in.h> /* sockaddr_in */
-#include <linux/inet.h>
-#include <linux/if.h>
-#include <asm/byteorder.h> /* htons(), etc. */
-#include <linux/sdlapci.h>
-#include <asm/io.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/inetdevice.h>
-#include <asm/uaccess.h>
-
-#include <net/syncppp.h>
-
-
-/****** 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 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
-
-/******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 chdlc_private_area
-{
- void *if_ptr; /* General Pointer used by SPPP */
- 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;
- char udp_pkt_data[MAX_LGTH_UDP_MGNT_PKT];
- unsigned short timer_int_enabled;
- char update_comms_stats; /* updating comms stats */
-
- //FIXME: add driver stats as per frame relay!
-
-} chdlc_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(struct wan_device* wandev);
-static int new_if(struct wan_device* wandev, struct net_device* dev,
- wanif_conf_t* conf);
-static int del_if(struct wan_device* wandev, struct net_device* dev);
-
-/* Network device interface */
-static int if_init(struct net_device* dev);
-static int if_open(struct net_device* dev);
-static int if_close(struct net_device* dev);
-static int if_send(struct sk_buff* skb, struct net_device* dev);
-static struct net_device_stats* if_stats(struct net_device* dev);
-
-static void if_tx_timeout(struct net_device *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 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 void init_chdlc_tx_rx_buff(sdla_t* card, struct net_device *dev);
-static int chdlc_error (sdla_t *card, int err, CHDLC_MAILBOX_STRUCT *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,
- chdlc_private_area_t* chdlc_priv_area);
-static void port_set_state (sdla_t *card, int);
-
-/* Interrupt handlers */
-static void wsppp_isr (sdla_t* card);
-static void rx_intr (sdla_t* card);
-static void timer_intr(sdla_t *);
-
-/* Miscellaneous functions */
-static int reply_udp( unsigned char *data, unsigned int mbox_len );
-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, struct net_device* dev,
- chdlc_private_area_t* chdlc_priv_area);
-static int process_udp_mgmt_pkt(sdla_t* card, struct net_device* dev,
- chdlc_private_area_t* chdlc_priv_area);
-static unsigned short calc_checksum (char *, int);
-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(struct net_device *dev);
-
-
-static int Intr_test_counter;
-/****** 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 wsppp_init (sdla_t* card, wandev_conf_t* conf)
-{
- unsigned char port_num;
- int err;
- unsigned long max_permitted_baud = 0;
- SHARED_MEMORY_INFO_STRUCT *flags;
-
- union
- {
- char str[80];
- } u;
- volatile CHDLC_MAILBOX_STRUCT* mb;
- CHDLC_MAILBOX_STRUCT* 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_ERR "%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_ERR "%s: ERROR - Invalid Port Selected!\n",
- card->wandev.name);
- return -EINVAL;
- }
-
-
- /* Initialize protocol-specific fields */
- if(card->hw.type != SDLA_S514){
-
- if (card->u.c.comm_port == WANOPT_PRI){
- card->mbox = (void *) card->hw.dpmbase;
- }else{
- card->mbox = (void *) card->hw.dpmbase +
- SEC_BASE_ADDR_MB_STRUCT - PRI_BASE_ADDR_MB_STRUCT;
- }
- }else{
- /* for a S514 adapter, set a pointer to the actual mailbox in the */
- /* allocated virtual memory area */
- if (card->u.c.comm_port == WANOPT_PRI){
- card->mbox = (void *) card->hw.dpmbase + PRI_BASE_ADDR_MB_STRUCT;
- }else{
- card->mbox = (void *) card->hw.dpmbase + SEC_BASE_ADDR_MB_STRUCT;
- }
- }
-
- mb = mb1 = card->mbox;
-
- if (!card->configured){
-
- /* 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 + 1 * HZ;
- while (mb->return_code != 'I') /* Wait 1s for board to initialize */
- if (time_after(jiffies, timeout)) break;
-
- if (mb->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;
- }
- }
-
- /* 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 CHDLC firmware v%s\n"
- "%s: for Multi-Port PPP protocol.\n",
- card->devname,u.str,card->devname);
-
- 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;
-
- card->wandev.new_if_cnt = 0;
-
- /* 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->hw.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->hw.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->hw.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 %lu bps\n",
- card->wandev.name, max_permitted_baud);
- }
-
- card->wandev.bps = conf->bps;
- }else{
- card->wandev.bps = 0;
- }
-
- /* 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) ?
- min_t(unsigned int, 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) ?
- min_t(unsigned int, 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->buffer_length = 0;
- mb1->command = READ_CHDLC_CONFIGURATION;
- err = sdla_exec(mb1) ? mb1->return_code : CMD_TIMEOUT;
- if(err != COMMAND_OK) {
- clear_bit(1, (void*)&card->wandev.critical);
-
- if(card->hw.type != SDLA_S514)
- enable_irq(card->hw.irq);
-
- chdlc_error(card, err, mb1);
- return -EIO;
- }
-
- if(card->hw.type == SDLA_S514){
- card->u.c.flags = (void *)(card->hw.dpmbase +
- (((CHDLC_CONFIGURATION_STRUCT *)mb1->data)->
- ptr_shared_mem_info_struct));
- }else{
- card->u.c.flags = (void *)(card->hw.dpmbase +
- (((CHDLC_CONFIGURATION_STRUCT *)mb1->data)->
- ptr_shared_mem_info_struct % SDLA_WINDOWSIZE));
- }
-
- flags = card->u.c.flags;
-
- /* 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 || (Intr_test_counter < MAX_INTR_TEST_COUNTER)) {
- printk(KERN_ERR "%s: Interrupt test failed (%i)\n",
- card->devname, Intr_test_counter);
- printk(KERN_ERR "%s: Please choose another interrupt\n",
- card->devname);
- return -EIO;
- }
-
- printk(KERN_INFO "%s: Interrupt test passed (%i)\n",
- card->devname, Intr_test_counter);
- }
-
-
- 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 */
- flags->interrupt_info_struct.interrupt_permission &=
- ~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(struct wan_device* wandev)
-{
- sdla_t* card = wandev->private;
- struct net_device* dev;
- volatile chdlc_private_area_t* chdlc_priv_area;
- SHARED_MEMORY_INFO_STRUCT *flags;
- 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->u.c.flags)
- return -ENODEV;
-
- if((dev=card->wandev.dev) == NULL)
- return -ENODEV;
-
- if((chdlc_priv_area=dev->priv) == NULL)
- return -ENODEV;
-
- flags = card->u.c.flags;
-
- if(chdlc_priv_area->update_comms_stats){
- return -EAGAIN;
- }
-
- /* we will need 2 timer interrupts to complete the */
- /* reading of the statistics */
- chdlc_priv_area->update_comms_stats = 2;
- flags->interrupt_info_struct.interrupt_permission |= APP_INT_ON_TIMER;
- chdlc_priv_area->timer_int_enabled = TMR_INT_ENABLED_UPDATE;
-
- /* wait a maximum of 1 second for the statistics to be updated */
- timeout = jiffies + 1 * HZ;
- for(;;) {
- if(chdlc_priv_area->update_comms_stats == 0)
- break;
- if (time_after(jiffies, timeout)){
- chdlc_priv_area->update_comms_stats = 0;
- chdlc_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(struct wan_device* wandev, struct net_device* pdev,
- wanif_conf_t* conf)
-{
-
- struct ppp_device *pppdev = (struct ppp_device *)pdev;
- struct net_device *dev = NULL;
- struct sppp *sp;
- sdla_t* card = wandev->private;
- chdlc_private_area_t* chdlc_priv_area;
-
- 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 */
- chdlc_priv_area = kmalloc(sizeof(chdlc_private_area_t), GFP_KERNEL);
-
- if(chdlc_priv_area == NULL)
- return -ENOMEM;
-
- memset(chdlc_priv_area, 0, sizeof(chdlc_private_area_t));
-
- chdlc_priv_area->card = card;
-
- /* initialize data */
- strcpy(card->u.c.if_name, conf->name);
-
- if(card->wandev.new_if_cnt > 0) {
- kfree(chdlc_priv_area);
- return -EEXIST;
- }
-
- card->wandev.new_if_cnt++;
-
- chdlc_priv_area->TracingEnabled = 0;
-
- //We don't need this any more
- chdlc_priv_area->route_status = NO_ROUTE;
- chdlc_priv_area->route_removed = 0;
-
- printk(KERN_INFO "%s: Firmware running in HDLC STREAMING Mode\n",
- wandev->name);
-
- /* Setup wanpipe as a router (WANPIPE) or as an API */
- if( strcmp(conf->usedby, "WANPIPE") == 0) {
- printk(KERN_INFO "%s: Driver running in WANPIPE mode!\n",
- wandev->name);
- card->u.c.usedby = WANPIPE;
- } else {
- printk(KERN_INFO
- "%s: API Mode is not supported for SyncPPP!\n",
- wandev->name);
- kfree(chdlc_priv_area);
- return -EINVAL;
- }
-
- /* Get Multicast Information */
- chdlc_priv_area->mc = conf->mc;
-
-
- chdlc_priv_area->if_ptr = pppdev;
-
- /* prepare network device data space for registration */
-
- strcpy(dev->name,card->u.c.if_name);
-
- /* Attach PPP protocol layer to pppdev
- * The 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.
- */
- sppp_attach(pppdev);
- dev = pppdev->dev;
- sp = &pppdev->sppp;
-
- /* Enable PPP Debugging */
- // FIXME Fix this up somehow
- //sp->pp_flags |= PP_DEBUG;
- sp->pp_flags &= ~PP_CISCO;
-
- dev->init = &if_init;
- dev->priv = chdlc_priv_area;
-
- return 0;
-}
-
-
-
-
-/*============================================================================
- * Delete logical channel.
- */
-static int del_if(struct wan_device* wandev, struct net_device* dev)
-{
- chdlc_private_area_t *chdlc_priv_area = dev->priv;
- sdla_t *card = chdlc_priv_area->card;
- unsigned long smp_lock;
-
- /* Detach the PPP layer */
- printk(KERN_INFO "%s: Detaching SyncPPP Module from %s\n",
- wandev->name,dev->name);
-
- lock_adapter_irq(&wandev->lock,&smp_lock);
-
- sppp_detach(dev);
- chdlc_priv_area->if_ptr=NULL;
-
- chdlc_set_intr_mode(card, 0);
- if (card->u.c.comm_enabled)
- chdlc_comm_disable(card);
- unlock_adapter_irq(&wandev->lock,&smp_lock);
-
- port_set_state(card, WAN_DISCONNECTED);
-
- 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(struct net_device* dev)
-{
- chdlc_private_area_t* chdlc_priv_area = dev->priv;
- sdla_t* card = chdlc_priv_area->card;
- struct wan_device* 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;
- dev->tx_timeout = &if_tx_timeout;
- dev->watchdog_timeo = TX_TIMEOUT;
-
-
- /* Initialize hardware parameters */
- dev->irq = wandev->irq;
- dev->dma = wandev->dma;
- dev->base_addr = wandev->ioport;
- dev->mem_start = wandev->maddr;
- dev->mem_end = 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;
-}
-
-
-/*============================================================================
- * Handle transmit timeout event from netif watchdog
- */
-static void if_tx_timeout(struct net_device *dev)
-{
- chdlc_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;
-
- printk (KERN_INFO "%s: Transmit timed out on %s\n", card->devname,dev->name);
- netif_wake_queue (dev);
-}
-
-
-/*============================================================================
- * 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(struct net_device* dev)
-{
- chdlc_private_area_t* chdlc_priv_area = dev->priv;
- sdla_t* card = chdlc_priv_area->card;
- struct timeval tv;
- SHARED_MEMORY_INFO_STRUCT *flags = card->u.c.flags;
-
- /* Only one open per interface is allowed */
- if (netif_running(dev))
- return -EBUSY;
-
- /* Start PPP Layer */
- if (sppp_open(dev)){
- return -EIO;
- }
-
- do_gettimeofday(&tv);
- chdlc_priv_area->router_start_time = tv.tv_sec;
-
- netif_start_queue(dev);
-
- wanpipe_open(card);
-
- chdlc_priv_area->timer_int_enabled |= TMR_INT_ENABLED_CONFIG;
- flags->interrupt_info_struct.interrupt_permission |= 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(struct net_device* dev)
-{
- chdlc_private_area_t* chdlc_priv_area = dev->priv;
- sdla_t* card = chdlc_priv_area->card;
-
- /* Stop the PPP Layer */
- sppp_close(dev);
- netif_stop_queue(dev);
-
- 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, struct net_device* dev)
-{
- chdlc_private_area_t *chdlc_priv_area = dev->priv;
- sdla_t *card = chdlc_priv_area->card;
- SHARED_MEMORY_INFO_STRUCT *flags = card->u.c.flags;
- INTERRUPT_INFORMATION_STRUCT *chdlc_int = &flags->interrupt_info_struct;
- int udp_type = 0;
- unsigned long smp_flags;
- int err=0;
-
- netif_stop_queue(dev);
-
-
- 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);
-
- netif_wake_queue(dev);
- return 0;
- }
-
- if (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,
- chdlc_priv_area)){
- chdlc_int->interrupt_permission |=
- APP_INT_ON_TIMER;
- }
- netif_start_queue(dev);
- return 0;
- }
- }
-
- /* Lock the 508 Card: SMP is supported */
- if(card->hw.type != SDLA_S514){
- s508_lock(card,&smp_flags);
- }
-
- 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;
- netif_start_queue(dev);
- goto if_send_crit_exit;
- }
-
- if (card->wandev.state != WAN_CONNECTED){
- ++card->wandev.stats.tx_dropped;
- netif_start_queue(dev);
- goto if_send_crit_exit;
- }
-
- if (chdlc_send(card, skb->data, skb->len)){
- netif_stop_queue(dev);
-
- }else{
- ++card->wandev.stats.tx_packets;
- card->wandev.stats.tx_bytes += skb->len;
- dev->trans_start = jiffies;
- netif_start_queue(dev);
- }
-
-if_send_crit_exit:
- if (!(err=netif_queue_stopped(dev))){
- dev_kfree_skb_any(skb);
- }else{
- chdlc_priv_area->tick_counter = jiffies;
- chdlc_int->interrupt_permission |= APP_INT_ON_TX_FRAME;
- }
-
- clear_bit(SEND_CRIT, (void*)&card->wandev.critical);
- if(card->hw.type != SDLA_S514){
- s508_unlock(card,&smp_flags);
- }
-
- return err;
-}
-
-
-/*============================================================================
- * Reply to UDP Management system.
- * Return length of reply.
- */
-static int reply_udp( unsigned char *data, unsigned int mbox_len )
-{
-
- unsigned short len, udp_length, temp, ip_length;
- unsigned long ip_temp;
- int even_bound = 0;
- chdlc_udp_pkt_t *c_udp_pkt = (chdlc_udp_pkt_t *)data;
-
- /* Set length of packet */
- len = sizeof(ip_pkt_t)+
- sizeof(udp_pkt_t)+
- sizeof(wp_mgmt_t)+
- sizeof(cblock_t)+
- sizeof(trace_info_t)+
- mbox_len;
-
- /* fill in UDP reply */
- c_udp_pkt->wp_mgmt.request_reply = UDPMGMT_REPLY;
-
- /* fill in UDP length */
- udp_length = sizeof(udp_pkt_t)+
- sizeof(wp_mgmt_t)+
- sizeof(cblock_t)+
- sizeof(trace_info_t)+
- mbox_len;
-
- /* put it on an even boundary */
- if ( udp_length & 0x0001 ) {
- udp_length += 1;
- len += 1;
- even_bound = 1;
- }
-
- temp = (udp_length<<8)|(udp_length>>8);
- c_udp_pkt->udp_pkt.udp_length = temp;
-
- /* swap UDP ports */
- temp = c_udp_pkt->udp_pkt.udp_src_port;
- c_udp_pkt->udp_pkt.udp_src_port =
- c_udp_pkt->udp_pkt.udp_dst_port;
- c_udp_pkt->udp_pkt.udp_dst_port = temp;
-
- /* add UDP pseudo header */
- temp = 0x1100;
- *((unsigned short *)(c_udp_pkt->data+mbox_len+even_bound)) = temp;
- temp = (udp_length<<8)|(udp_length>>8);
- *((unsigned short *)(c_udp_pkt->data+mbox_len+even_bound+2)) = temp;
-
-
- /* calculate UDP checksum */
- c_udp_pkt->udp_pkt.udp_checksum = 0;
- c_udp_pkt->udp_pkt.udp_checksum = calc_checksum(&data[UDP_OFFSET],udp_length+UDP_OFFSET);
-
- /* fill in IP length */
- ip_length = len;
- temp = (ip_length<<8)|(ip_length>>8);
- c_udp_pkt->ip_pkt.total_length = temp;
-
- /* swap IP addresses */
- ip_temp = c_udp_pkt->ip_pkt.ip_src_address;
- c_udp_pkt->ip_pkt.ip_src_address = c_udp_pkt->ip_pkt.ip_dst_address;
- c_udp_pkt->ip_pkt.ip_dst_address = ip_temp;
-
- /* fill in IP checksum */
- c_udp_pkt->ip_pkt.hdr_checksum = 0;
- c_udp_pkt->ip_pkt.hdr_checksum = calc_checksum(data,sizeof(ip_pkt_t));
-
- return len;
-
-} /* reply_udp */
-
-unsigned short calc_checksum (char *data, int len)
-{
- unsigned short temp;
- unsigned long sum=0;
- int i;
-
- for( i = 0; i <len; i+=2 ) {
- memcpy(&temp,&data[i],2);
- sum += (unsigned long)temp;
- }
-
- while (sum >> 16 ) {
- sum = (sum & 0xffffUL) + (sum >> 16);
- }
-
- temp = (unsigned short)sum;
- temp = ~temp;
-
- if( temp == 0 )
- temp = 0xffff;
-
- return temp;
-}
-
-
-/*============================================================================
- * Get ethernet-style interface statistics.
- * Return a pointer to struct enet_statistics.
- */
-static struct net_device_stats* if_stats(struct net_device* dev)
-{
- sdla_t *my_card;
- chdlc_private_area_t* chdlc_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 ((chdlc_priv_area=dev->priv) == NULL)
- return NULL;
-
- my_card = chdlc_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 chdlc_read_version (sdla_t* card, char* str)
-{
- CHDLC_MAILBOX_STRUCT* mb = card->mbox;
- int len;
- char err;
- mb->buffer_length = 0;
- mb->command = READ_CHDLC_CODE_VERSION;
- err = sdla_exec(mb) ? mb->return_code : CMD_TIMEOUT;
-
- if(err != COMMAND_OK) {
- chdlc_error(card,err,mb);
- }
- else if (str) { /* is not null */
- len = mb->buffer_length;
- memcpy(str, mb->data, len);
- str[len] = '\0';
- }
- return (err);
-}
-
-/*-----------------------------------------------------------------------------
- * Configure CHDLC firmware.
- */
-static int chdlc_configure (sdla_t* card, void* data)
-{
- int err;
- CHDLC_MAILBOX_STRUCT *mailbox = card->mbox;
- int data_length = sizeof(CHDLC_CONFIGURATION_STRUCT);
-
- mailbox->buffer_length = data_length;
- memcpy(mailbox->data, data, data_length);
- mailbox->command = SET_CHDLC_CONFIGURATION;
- err = sdla_exec(mailbox) ? mailbox->return_code : CMD_TIMEOUT;
-
- if (err != COMMAND_OK) chdlc_error (card, err, mailbox);
-
- return err;
-}
-
-
-/*============================================================================
- * Set interrupt mode -- HDLC Version.
- */
-
-static int chdlc_set_intr_mode (sdla_t* card, unsigned mode)
-{
- CHDLC_MAILBOX_STRUCT* mb = card->mbox;
- CHDLC_INT_TRIGGERS_STRUCT* int_data =
- (CHDLC_INT_TRIGGERS_STRUCT *)mb->data;
- int err;
-
- int_data->CHDLC_interrupt_triggers = mode;
- int_data->IRQ = card->hw.irq;
- int_data->interrupt_timer = 1;
-
- mb->buffer_length = sizeof(CHDLC_INT_TRIGGERS_STRUCT);
- mb->command = SET_CHDLC_INTERRUPT_TRIGGERS;
- err = sdla_exec(mb) ? mb->return_code : CMD_TIMEOUT;
- if (err != COMMAND_OK)
- chdlc_error (card, err, mb);
- return err;
-}
-
-
-/*============================================================================
- * Enable communications.
- */
-
-static int chdlc_comm_enable (sdla_t* card)
-{
- int err;
- CHDLC_MAILBOX_STRUCT* mb = card->mbox;
-
- mb->buffer_length = 0;
- mb->command = ENABLE_CHDLC_COMMUNICATIONS;
- err = sdla_exec(mb) ? mb->return_code : CMD_TIMEOUT;
- 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;
- CHDLC_MAILBOX_STRUCT* mb = card->mbox;
-
- mb->buffer_length = 0;
- mb->command = DISABLE_CHDLC_COMMUNICATIONS;
- err = sdla_exec(mb) ? mb->return_code : CMD_TIMEOUT;
- 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;
- CHDLC_MAILBOX_STRUCT* mb = card->mbox;
-
- mb->buffer_length = 0;
- mb->command = READ_COMMS_ERROR_STATS;
- err = sdla_exec(mb) ? mb->return_code : CMD_TIMEOUT;
- 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;
- CHDLC_MAILBOX_STRUCT* mb = card->mbox;
-
- mb->buffer_length = 0;
- mb->command = READ_CHDLC_OPERATIONAL_STATS;
- err = sdla_exec(mb) ? mb->return_code : CMD_TIMEOUT;
- 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,
- chdlc_private_area_t* chdlc_priv_area)
-{
- CHDLC_MAILBOX_STRUCT* mb = card->mbox;
- COMMS_ERROR_STATS_STRUCT* err_stats;
- CHDLC_OPERATIONAL_STATS_STRUCT *op_stats;
-
- /* on the first timer interrupt, read the comms error statistics */
- if(chdlc_priv_area->update_comms_stats == 2) {
- if(chdlc_read_comm_err_stats(card))
- return 1;
- err_stats = (COMMS_ERROR_STATS_STRUCT *)mb->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 */
- else {
- if(chdlc_read_op_stats(card))
- return 1;
- op_stats = (CHDLC_OPERATIONAL_STATS_STRUCT *)mb->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->u.c.txbuf;
-
- if (txbuf->opp_flag)
- return 1;
-
- sdla_poke(&card->hw, txbuf->ptr_data_bfr, data, len);
-
- txbuf->frame_length = len;
- txbuf->opp_flag = 1; /* start transmission */
-
- /* Update transmit buffer control fields */
- card->u.c.txbuf = ++txbuf;
-
- if ((void*)txbuf > card->u.c.txbuf_last)
- card->u.c.txbuf = card->u.c.txbuf_base;
-
- return 0;
-}
-
-/****** 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, CHDLC_MAILBOX_STRUCT *mb)
-{
- unsigned cmd = mb->command;
-
- switch (err) {
-
- case CMD_TIMEOUT:
- printk(KERN_ERR "%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 void wsppp_isr (sdla_t* card)
-{
- struct net_device* dev;
- SHARED_MEMORY_INFO_STRUCT* flags = NULL;
- int i;
- sdla_t *my_card;
-
-
- /* Check for which port the interrupt has been generated
- * Since Secondary Port is piggybacking on the Primary
- * the check must be done here.
- */
-
- flags = card->u.c.flags;
- if (!flags->interrupt_info_struct.interrupt_type){
- /* Check for a second port (piggybacking) */
- if((my_card = card->next)){
- flags = my_card->u.c.flags;
- if (flags->interrupt_info_struct.interrupt_type){
- card = my_card;
- card->isr(card);
- return;
- }
- }
- }
-
- dev = card->wandev.dev;
- card->in_isr = 1;
- flags = card->u.c.flags;
-
- /* 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(test_bit(PERI_CRIT, (void*)&card->wandev.critical)) {
- flags->interrupt_info_struct.
- interrupt_type = 0;
- goto isr_done;
- }
-
-
- /* On a 508 Card, if critical due to if_send
- * Major Error !!!
- */
- if(card->hw.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_info_struct.interrupt_type) {
-
- case RX_APP_INT_PEND: /* 0x01: receive interrupt */
- rx_intr(card);
- break;
-
- case TX_APP_INT_PEND: /* 0x02: transmit interrupt */
- flags->interrupt_info_struct.interrupt_permission &=
- ~APP_INT_ON_TX_FRAME;
-
- netif_wake_queue(dev);
- break;
-
- case COMMAND_COMPLETE_APP_INT_PEND:/* 0x04: cmd cplt */
- ++ Intr_test_counter;
- 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);
- break;
-
- case TIMER_APP_INT_PEND:
- timer_intr(card);
- break;
-
- default:
- 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(KERN_INFO "%c",
- flags->global_info_struct.codename[i]);
- printk(KERN_INFO "\nCode version: ");
- for(i = 0; i < 4; i ++)
- printk(KERN_INFO "%c",
- flags->global_info_struct.codeversion[i]);
- printk(KERN_INFO "\n");
- break;
- }
-
-isr_done:
- card->in_isr = 0;
- flags->interrupt_info_struct.interrupt_type = 0;
-}
-
-/*============================================================================
- * Receive interrupt handler.
- */
-static void rx_intr (sdla_t* card)
-{
- struct net_device *dev;
- chdlc_private_area_t *chdlc_priv_area;
- SHARED_MEMORY_INFO_STRUCT *flags = card->u.c.flags;
- CHDLC_DATA_RX_STATUS_EL_STRUCT *rxbuf = card->u.c.rxmb;
- struct sk_buff *skb;
- unsigned len;
- unsigned addr = rxbuf->ptr_data_bfr;
- void *buf;
- int i,udp_type;
-
- if (rxbuf->opp_flag != 0x01) {
- printk(KERN_INFO
- "%s: corrupted Rx buffer @ 0x%X, flag = 0x%02X!\n",
- card->devname, (unsigned)rxbuf, 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 "\nCode 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 = card->wandev.dev;
-
- if (!dev){
- goto rx_exit;
- }
-
- if (!netif_running(dev)){
- goto rx_exit;
- }
-
- chdlc_priv_area = dev->priv;
-
- if (rxbuf->error_flag){
- goto rx_exit;
- }
- /* Take off two CRC bytes */
-
- if (rxbuf->frame_length < 7 || rxbuf->frame_length > 1506 ){
- goto rx_exit;
- }
-
- len = rxbuf->frame_length - CRC_LENGTH;
-
- /* Allocate socket buffer */
- skb = dev_alloc_skb(len);
-
- 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;
- }
-
- /* Copy data to the socket buffer */
- if((addr + len) > card->u.c.rx_top + 1) {
- unsigned tmp = card->u.c.rx_top - addr + 1;
- buf = skb_put(skb, tmp);
- sdla_peek(&card->hw, addr, buf, tmp);
- addr = card->u.c.rx_base;
- len -= tmp;
- }
-
- buf = skb_put(skb, len);
- sdla_peek(&card->hw, addr, buf, len);
-
- skb->protocol = htons(ETH_P_WAN_PPP);
-
- card->wandev.stats.rx_packets ++;
- card->wandev.stats.rx_bytes += skb->len;
- udp_type = udp_pkt_type( skb, card );
-
- if(udp_type == UDP_CPIPE_TYPE) {
- if(store_udp_mgmt_pkt(UDP_PKT_FRM_NETWORK,
- card, skb, dev, chdlc_priv_area)) {
- flags->interrupt_info_struct.
- interrupt_permission |=
- APP_INT_ON_TIMER;
- }
- }else{
- /* Pass it up the protocol stack */
- skb->dev = dev;
- skb->mac.raw = skb->data;
- netif_rx(skb);
- dev->last_rx = jiffies;
- }
-
-rx_exit:
- /* Release buffer element and calculate a pointer to the next one */
- rxbuf->opp_flag = 0x00;
- card->u.c.rxmb = ++ rxbuf;
- if((void*)rxbuf > card->u.c.rxbuf_last){
- card->u.c.rxmb = card->u.c.rxbuf_base;
- }
-}
-
-/*============================================================================
- * 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)
-{
- struct net_device* dev;
- chdlc_private_area_t* chdlc_priv_area = NULL;
- SHARED_MEMORY_INFO_STRUCT* flags = NULL;
-
- dev = card->wandev.dev;
- chdlc_priv_area = dev->priv;
-
- if (chdlc_priv_area->timer_int_enabled & TMR_INT_ENABLED_CONFIG) {
- if (!config_chdlc(card)){
- chdlc_priv_area->timer_int_enabled &= ~TMR_INT_ENABLED_CONFIG;
- }
- }
-
- /* process a udp call if pending */
- if(chdlc_priv_area->timer_int_enabled & TMR_INT_ENABLED_UDP) {
- process_udp_mgmt_pkt(card, dev,
- chdlc_priv_area);
- chdlc_priv_area->timer_int_enabled &= ~TMR_INT_ENABLED_UDP;
- }
-
-
- /* read the communications statistics if required */
- if(chdlc_priv_area->timer_int_enabled & TMR_INT_ENABLED_UPDATE) {
- update_comms_stats(card, chdlc_priv_area);
- if(!(-- chdlc_priv_area->update_comms_stats)) {
- chdlc_priv_area->timer_int_enabled &=
- ~TMR_INT_ENABLED_UPDATE;
- }
- }
-
- /* only disable the timer interrupt if there are no udp or statistic */
- /* updates pending */
- if(!chdlc_priv_area->timer_int_enabled) {
- flags = card->u.c.flags;
- flags->interrupt_info_struct.interrupt_permission &=
- ~APP_INT_ON_TIMER;
- }
-}
-
-/*------------------------------------------------------------------------------
- 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 = DISCARD_RX_ERROR_FRAMES;
- cfg.modem_status_timer = 100;
- cfg.CHDLC_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;
-
- 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)
-{
- CHDLC_MAILBOX_STRUCT* mbox = card->mbox;
- int err;
-
- mbox->buffer_length = 0;
- mbox->command = READ_GLOBAL_EXCEPTION_CONDITION;
- err = sdla_exec(mbox) ? mbox->return_code : CMD_TIMEOUT;
-
- if(err != CMD_TIMEOUT ){
-
- switch(mbox->return_code) {
-
- case EXCEP_MODEM_STATUS_CHANGE:
-
- printk(KERN_INFO "%s: Modem status change\n",
- card->devname);
-
- switch(mbox->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;
- }
-
- if (!(mbox->data[0] & DCD_HIGH) || !(mbox->data[0] & DCD_HIGH)){
- //printk(KERN_INFO "Sending TERM Request Manually !\n");
- send_ppp_term_request(card->wandev.dev);
- }
- 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, mbox->return_code);
- break;
- }
- }
- return 0;
-}
-
-
-/*============================================================================
- * Process chdlc exception condition
- */
-static int process_chdlc_exception(sdla_t *card)
-{
- CHDLC_MAILBOX_STRUCT* mb = card->mbox;
- int err;
-
- mb->buffer_length = 0;
- mb->command = READ_CHDLC_EXCEPTION_CONDITION;
- err = sdla_exec(mb) ? mb->return_code : CMD_TIMEOUT;
- if(err != CMD_TIMEOUT) {
-
- switch (err) {
-
- case EXCEP_LINK_ACTIVE:
- port_set_state(card, WAN_CONNECTED);
- break;
-
- case EXCEP_LINK_INACTIVE_MODEM:
- 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, struct net_device* dev,
- chdlc_private_area_t* chdlc_priv_area )
-{
- int udp_pkt_stored = 0;
-
- if(!chdlc_priv_area->udp_pkt_lgth &&
- (skb->len <= MAX_LGTH_UDP_MGNT_PKT)) {
- chdlc_priv_area->udp_pkt_lgth = skb->len;
- chdlc_priv_area->udp_pkt_src = udp_pkt_src;
- memcpy(chdlc_priv_area->udp_pkt_data, skb->data, skb->len);
- chdlc_priv_area->timer_int_enabled = TMR_INT_ENABLED_UDP;
- udp_pkt_stored = 1;
- }
-
- if(udp_pkt_src == UDP_PKT_FRM_STACK)
- dev_kfree_skb_any(skb);
- else
- dev_kfree_skb_any(skb);
-
- return(udp_pkt_stored);
-}
-
-
-/*=============================================================================
- * Process UDP management packet.
- */
-
-static int process_udp_mgmt_pkt(sdla_t* card, struct net_device* dev,
- chdlc_private_area_t* chdlc_priv_area )
-{
- unsigned char *buf;
- unsigned int frames, len;
- struct sk_buff *new_skb;
- unsigned short buffer_length, real_len;
- unsigned long data_ptr;
- unsigned data_length;
- int udp_mgmt_req_valid = 1;
- CHDLC_MAILBOX_STRUCT *mb = card->mbox;
- SHARED_MEMORY_INFO_STRUCT *flags = card->u.c.flags;
- chdlc_udp_pkt_t *chdlc_udp_pkt;
- struct timeval tv;
- int err;
- char ut_char;
-
- chdlc_udp_pkt = (chdlc_udp_pkt_t *) chdlc_priv_area->udp_pkt_data;
-
- if(chdlc_priv_area->udp_pkt_src == UDP_PKT_FRM_NETWORK) {
-
- switch(chdlc_udp_pkt->cblock.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:
- udp_mgmt_req_valid = 1;
- break;
- default:
- udp_mgmt_req_valid = 0;
- break;
- }
- }
-
- if(!udp_mgmt_req_valid) {
-
- /* set length to 0 */
- chdlc_udp_pkt->cblock.buffer_length = 0;
-
- /* set return code */
- chdlc_udp_pkt->cblock.return_code = 0xCD;
-
- if (net_ratelimit()){
- printk(KERN_INFO
- "%s: Warning, Illegal UDP command attempted from network: %x\n",
- card->devname,chdlc_udp_pkt->cblock.command);
- }
-
- } else {
- unsigned long trace_status_cfg_addr = 0;
- TRACE_STATUS_EL_CFG_STRUCT trace_cfg_struct;
- TRACE_STATUS_ELEMENT_STRUCT trace_element_struct;
-
- switch(chdlc_udp_pkt->cblock.command) {
-
- case CPIPE_ENABLE_TRACING:
- if (!chdlc_priv_area->TracingEnabled) {
-
- /* OPERATE_DATALINE_MONITOR */
-
- mb->buffer_length = sizeof(LINE_TRACE_CONFIG_STRUCT);
- mb->command = SET_TRACE_CONFIGURATION;
-
- ((LINE_TRACE_CONFIG_STRUCT *)mb->data)->
- trace_config = TRACE_ACTIVE;
- /* Trace delay mode is not used because it slows
- down transfer and results in a standoff situation
- when there is a lot of data */
-
- /* Configure the Trace based on user inputs */
- ((LINE_TRACE_CONFIG_STRUCT *)mb->data)->trace_config |=
- chdlc_udp_pkt->data[0];
-
- ((LINE_TRACE_CONFIG_STRUCT *)mb->data)->
- trace_deactivation_timer = 4000;
-
-
- err = sdla_exec(mb) ? mb->return_code : CMD_TIMEOUT;
- if (err != COMMAND_OK) {
- chdlc_error(card,err,mb);
- card->TracingEnabled = 0;
- chdlc_udp_pkt->cblock.return_code = err;
- mb->buffer_length = 0;
- break;
- }
-
- /* Get the base address of the trace element list */
- mb->buffer_length = 0;
- mb->command = READ_TRACE_CONFIGURATION;
- err = sdla_exec(mb) ? mb->return_code : CMD_TIMEOUT;
-
- if (err != COMMAND_OK) {
- chdlc_error(card,err,mb);
- chdlc_priv_area->TracingEnabled = 0;
- chdlc_udp_pkt->cblock.return_code = err;
- mb->buffer_length = 0;
- break;
- }
-
- trace_status_cfg_addr =((LINE_TRACE_CONFIG_STRUCT *)
- mb->data) -> ptr_trace_stat_el_cfg_struct;
-
- sdla_peek(&card->hw, trace_status_cfg_addr,
- &trace_cfg_struct, sizeof(trace_cfg_struct));
-
- chdlc_priv_area->start_trace_addr = trace_cfg_struct.
- base_addr_trace_status_elements;
-
- chdlc_priv_area->number_trace_elements =
- trace_cfg_struct.number_trace_status_elements;
-
- chdlc_priv_area->end_trace_addr = (unsigned long)
- ((TRACE_STATUS_ELEMENT_STRUCT *)
- chdlc_priv_area->start_trace_addr +
- (chdlc_priv_area->number_trace_elements - 1));
-
- chdlc_priv_area->base_addr_trace_buffer =
- trace_cfg_struct.base_addr_trace_buffer;
-
- chdlc_priv_area->end_addr_trace_buffer =
- trace_cfg_struct.end_addr_trace_buffer;
-
- chdlc_priv_area->curr_trace_addr =
- trace_cfg_struct.next_trace_element_to_use;
-
- chdlc_priv_area->available_buffer_space = 2000 -
- sizeof(ip_pkt_t) -
- sizeof(udp_pkt_t) -
- sizeof(wp_mgmt_t) -
- sizeof(cblock_t) -
- sizeof(trace_info_t);
- }
- chdlc_udp_pkt->cblock.return_code = COMMAND_OK;
- mb->buffer_length = 0;
- chdlc_priv_area->TracingEnabled = 1;
- break;
-
-
- case CPIPE_DISABLE_TRACING:
- if (chdlc_priv_area->TracingEnabled) {
-
- /* OPERATE_DATALINE_MONITOR */
- mb->buffer_length = sizeof(LINE_TRACE_CONFIG_STRUCT);
- mb->command = SET_TRACE_CONFIGURATION;
- ((LINE_TRACE_CONFIG_STRUCT *)mb->data)->
- trace_config = TRACE_INACTIVE;
- err = sdla_exec(mb) ? mb->return_code : CMD_TIMEOUT;
- }
-
- chdlc_priv_area->TracingEnabled = 0;
- chdlc_udp_pkt->cblock.return_code = COMMAND_OK;
- mb->buffer_length = 0;
- break;
-
-
- case CPIPE_GET_TRACE_INFO:
-
- if (!chdlc_priv_area->TracingEnabled) {
- chdlc_udp_pkt->cblock.return_code = 1;
- mb->buffer_length = 0;
- break;
- }
-
- chdlc_udp_pkt->trace_info.ismoredata = 0x00;
- buffer_length = 0; /* offset of packet already occupied */
-
- for (frames=0; frames < chdlc_priv_area->number_trace_elements; frames++){
-
- trace_pkt_t *trace_pkt = (trace_pkt_t *)
- &chdlc_udp_pkt->data[buffer_length];
-
- sdla_peek(&card->hw, chdlc_priv_area->curr_trace_addr,
- (unsigned char *)&trace_element_struct,
- sizeof(TRACE_STATUS_ELEMENT_STRUCT));
-
- if (trace_element_struct.opp_flag == 0x00) {
- break;
- }
-
- /* get pointer to real data */
- data_ptr = trace_element_struct.ptr_data_bfr;
-
- /* See if there is actual data on the trace buffer */
- if (data_ptr){
- data_length = trace_element_struct.trace_length;
- }else{
- data_length = 0;
- chdlc_udp_pkt->trace_info.ismoredata = 0x01;
- }
-
- if( (chdlc_priv_area->available_buffer_space - buffer_length)
- < ( sizeof(trace_pkt_t) + data_length) ) {
-
- /* indicate there are more frames on board & exit */
- chdlc_udp_pkt->trace_info.ismoredata = 0x01;
- break;
- }
-
- trace_pkt->status = trace_element_struct.trace_type;
-
- trace_pkt->time_stamp =
- trace_element_struct.trace_time_stamp;
-
- trace_pkt->real_length =
- trace_element_struct.trace_length;
-
- /* see if we can fit the frame into the user buffer */
- real_len = trace_pkt->real_length;
-
- if (data_ptr == 0) {
- trace_pkt->data_avail = 0x00;
- } else {
- unsigned tmp = 0;
-
- /* get the data from circular buffer
- must check for end of buffer */
- trace_pkt->data_avail = 0x01;
-
- if ((data_ptr + real_len) >
- chdlc_priv_area->end_addr_trace_buffer + 1){
-
- tmp = chdlc_priv_area->end_addr_trace_buffer - data_ptr + 1;
- sdla_peek(&card->hw, data_ptr,
- trace_pkt->data,tmp);
- data_ptr = chdlc_priv_area->base_addr_trace_buffer;
- }
-
- sdla_peek(&card->hw, data_ptr,
- &trace_pkt->data[tmp], real_len - tmp);
- }
-
- /* zero the opp flag to show we got the frame */
- ut_char = 0x00;
- sdla_poke(&card->hw, chdlc_priv_area->curr_trace_addr, &ut_char, 1);
-
- /* now move onto the next frame */
- chdlc_priv_area->curr_trace_addr += sizeof(TRACE_STATUS_ELEMENT_STRUCT);
-
- /* check if we went over the last address */
- if ( chdlc_priv_area->curr_trace_addr > chdlc_priv_area->end_trace_addr ) {
- chdlc_priv_area->curr_trace_addr = chdlc_priv_area->start_trace_addr;
- }
-
- if(trace_pkt->data_avail == 0x01) {
- buffer_length += real_len - 1;
- }
-
- /* for the header */
- buffer_length += sizeof(trace_pkt_t);
-
- } /* For Loop */
-
- if (frames == chdlc_priv_area->number_trace_elements){
- chdlc_udp_pkt->trace_info.ismoredata = 0x01;
- }
- chdlc_udp_pkt->trace_info.num_frames = frames;
-
- mb->buffer_length = buffer_length;
- chdlc_udp_pkt->cblock.buffer_length = buffer_length;
-
- chdlc_udp_pkt->cblock.return_code = COMMAND_OK;
-
- break;
-
-
- case CPIPE_FT1_READ_STATUS:
- ((unsigned char *)chdlc_udp_pkt->data )[0] =
- flags->FT1_info_struct.parallel_port_A_input;
-
- ((unsigned char *)chdlc_udp_pkt->data )[1] =
- flags->FT1_info_struct.parallel_port_B_input;
-
- chdlc_udp_pkt->cblock.return_code = COMMAND_OK;
- mb->buffer_length = 2;
- break;
-
- case CPIPE_ROUTER_UP_TIME:
- do_gettimeofday( &tv );
- chdlc_priv_area->router_up_time = tv.tv_sec -
- chdlc_priv_area->router_start_time;
- *(unsigned long *)&chdlc_udp_pkt->data =
- chdlc_priv_area->router_up_time;
- mb->buffer_length = sizeof(unsigned long);
- break;
-
- case FT1_MONITOR_STATUS_CTRL:
- /* Enable FT1 MONITOR STATUS */
- if ((chdlc_udp_pkt->data[0] & ENABLE_READ_FT1_STATUS) ||
- (chdlc_udp_pkt->data[0] & ENABLE_READ_FT1_OP_STATS)) {
-
- if( rCount++ != 0 ) {
- chdlc_udp_pkt->cblock.
- return_code = COMMAND_OK;
- mb->buffer_length = 1;
- break;
- }
- }
-
- /* Disable FT1 MONITOR STATUS */
- if( chdlc_udp_pkt->data[0] == 0) {
-
- if( --rCount != 0) {
- chdlc_udp_pkt->cblock.
- return_code = COMMAND_OK;
- mb->buffer_length = 1;
- break;
- }
- }
-
- default:
- /* it's a board command */
- mb->command = chdlc_udp_pkt->cblock.command;
- mb->buffer_length = chdlc_udp_pkt->cblock.buffer_length;
- if (mb->buffer_length) {
- memcpy(&mb->data, (unsigned char *) chdlc_udp_pkt->
- data, mb->buffer_length);
- }
- /* run the command on the board */
- err = sdla_exec(mb) ? mb->return_code : CMD_TIMEOUT;
- if (err != COMMAND_OK) {
- break;
- }
-
- /* copy the result back to our buffer */
- memcpy(&chdlc_udp_pkt->cblock, mb, sizeof(cblock_t));
-
- if (mb->buffer_length) {
- memcpy(&chdlc_udp_pkt->data, &mb->data,
- mb->buffer_length);
- }
-
- } /* end of switch */
- } /* end of else */
-
- /* Fill UDP TTL */
- chdlc_udp_pkt->ip_pkt.ttl = card->wandev.ttl;
-
- len = reply_udp(chdlc_priv_area->udp_pkt_data, mb->buffer_length);
-
- if(chdlc_priv_area->udp_pkt_src == UDP_PKT_FRM_NETWORK) {
- if(!chdlc_send(card, chdlc_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, chdlc_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;
- new_skb->mac.raw = new_skb->data;
-
- netif_rx(new_skb);
- dev->last_rx = jiffies;
- } else {
-
- printk(KERN_INFO "%s: no socket buffers available!\n",
- card->devname);
- }
- }
-
- chdlc_priv_area->udp_pkt_lgth = 0;
-
- return 0;
-}
-
-/*============================================================================
- * Initialize Receive and Transmit Buffers.
- */
-
-static void init_chdlc_tx_rx_buff(sdla_t* card, struct net_device *dev)
-{
- CHDLC_MAILBOX_STRUCT* mb = card->mbox;
- CHDLC_TX_STATUS_EL_CFG_STRUCT *tx_config;
- CHDLC_RX_STATUS_EL_CFG_STRUCT *rx_config;
- char err;
-
- mb->buffer_length = 0;
- mb->command = READ_CHDLC_CONFIGURATION;
- err = sdla_exec(mb) ? mb->return_code : CMD_TIMEOUT;
-
- if(err != COMMAND_OK) {
- chdlc_error(card,err,mb);
- return;
- }
-
- if(card->hw.type == SDLA_S514) {
- tx_config = (CHDLC_TX_STATUS_EL_CFG_STRUCT *)(card->hw.dpmbase +
- (((CHDLC_CONFIGURATION_STRUCT *)mb->data)->
- ptr_CHDLC_Tx_stat_el_cfg_struct));
- rx_config = (CHDLC_RX_STATUS_EL_CFG_STRUCT *)(card->hw.dpmbase +
- (((CHDLC_CONFIGURATION_STRUCT *)mb->data)->
- ptr_CHDLC_Rx_stat_el_cfg_struct));
-
- /* Setup Head and Tails for buffers */
- card->u.c.txbuf_base = (void *)(card->hw.dpmbase +
- tx_config->base_addr_Tx_status_elements);
- card->u.c.txbuf_last =
- (CHDLC_DATA_TX_STATUS_EL_STRUCT *)
- card->u.c.txbuf_base +
- (tx_config->number_Tx_status_elements - 1);
-
- card->u.c.rxbuf_base = (void *)(card->hw.dpmbase +
- rx_config->base_addr_Rx_status_elements);
- card->u.c.rxbuf_last =
- (CHDLC_DATA_RX_STATUS_EL_STRUCT *)
- card->u.c.rxbuf_base +
- (rx_config->number_Rx_status_elements - 1);
-
- /* Set up next pointer to be used */
- card->u.c.txbuf = (void *)(card->hw.dpmbase +
- tx_config->next_Tx_status_element_to_use);
- card->u.c.rxmb = (void *)(card->hw.dpmbase +
- rx_config->next_Rx_status_element_to_use);
- }
- else {
- tx_config = (CHDLC_TX_STATUS_EL_CFG_STRUCT *)(card->hw.dpmbase +
- (((CHDLC_CONFIGURATION_STRUCT *)mb->data)->
- ptr_CHDLC_Tx_stat_el_cfg_struct % SDLA_WINDOWSIZE));
-
- rx_config = (CHDLC_RX_STATUS_EL_CFG_STRUCT *)(card->hw.dpmbase +
- (((CHDLC_CONFIGURATION_STRUCT *)mb->data)->
- ptr_CHDLC_Rx_stat_el_cfg_struct % SDLA_WINDOWSIZE));
-
- /* Setup Head and Tails for buffers */
- card->u.c.txbuf_base = (void *)(card->hw.dpmbase +
- (tx_config->base_addr_Tx_status_elements % SDLA_WINDOWSIZE));
- card->u.c.txbuf_last =
- (CHDLC_DATA_TX_STATUS_EL_STRUCT *)card->u.c.txbuf_base
- + (tx_config->number_Tx_status_elements - 1);
- card->u.c.rxbuf_base = (void *)(card->hw.dpmbase +
- (rx_config->base_addr_Rx_status_elements % SDLA_WINDOWSIZE));
- card->u.c.rxbuf_last =
- (CHDLC_DATA_RX_STATUS_EL_STRUCT *)card->u.c.rxbuf_base
- + (rx_config->number_Rx_status_elements - 1);
-
- /* Set up next pointer to be used */
- card->u.c.txbuf = (void *)(card->hw.dpmbase +
- (tx_config->next_Tx_status_element_to_use % SDLA_WINDOWSIZE));
- card->u.c.rxmb = (void *)(card->hw.dpmbase +
- (rx_config->next_Rx_status_element_to_use % SDLA_WINDOWSIZE));
- }
-
- /* Setup Actual Buffer Start and end addresses */
- card->u.c.rx_base = rx_config->base_addr_Rx_buffer;
- card->u.c.rx_top = 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)
-{
- CHDLC_MAILBOX_STRUCT* mb = card->mbox;
- int err,i;
-
- Intr_test_counter = 0;
-
- /* The critical flag is unset because during initialization (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 ++) {
- mb->buffer_length = 0;
- mb->command = READ_CHDLC_CODE_VERSION;
- err = sdla_exec(mb) ? mb->return_code : CMD_TIMEOUT;
- }
- }
- else {
- return err;
- }
-
- 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)
-{
- chdlc_udp_pkt_t *chdlc_udp_pkt = (chdlc_udp_pkt_t *)skb->data;
-
- if (!strncmp(chdlc_udp_pkt->wp_mgmt.signature,UDPMGMT_SIGNATURE,8) &&
- (chdlc_udp_pkt->udp_pkt.udp_dst_port == ntohs(card->wandev.udp_port)) &&
- (chdlc_udp_pkt->ip_pkt.protocol == UDPMGMT_UDP_PROTOCOL) &&
- (chdlc_udp_pkt->wp_mgmt.request_reply == UDPMGMT_REQUEST)) {
- return UDP_CPIPE_TYPE;
- }
- else return UDP_INVALID_TYPE;
-}
-
-/*============================================================================
- * Set PORT state.
- */
-static void port_set_state (sdla_t *card, int state)
-{
- struct net_device *dev = card->wandev.dev;
- chdlc_private_area_t *chdlc_priv_area = dev->priv;
-
- if (card->u.c.state != state)
- {
- switch (state)
- {
- case WAN_CONNECTED:
- printk (KERN_INFO "%s: HDLC link connected!\n",
- card->devname);
- break;
-
- case WAN_CONNECTING:
- printk (KERN_INFO "%s: HDLC link connecting...\n",
- card->devname);
- break;
-
- case WAN_DISCONNECTED:
- printk (KERN_INFO "%s: HDLC link disconnected!\n",
- card->devname);
- break;
- }
-
- card->wandev.state = card->u.c.state = state;
- chdlc_priv_area->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)
-{
- struct net_device *dev = card->wandev.dev;
- SHARED_MEMORY_INFO_STRUCT *flags = card->u.c.flags;
-
- if (card->u.c.comm_enabled){
- chdlc_comm_disable(card);
- port_set_state(card, WAN_DISCONNECTED);
- }
-
- if (set_chdlc_config(card)) {
- printk(KERN_INFO "%s: CHDLC Configuration Failed!\n",
- card->devname);
- return 0;
- }
- init_chdlc_tx_rx_buff(card, dev);
-
- /* 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 the Transmit and Timer interrupt */
- flags->interrupt_info_struct.interrupt_permission &=
- ~(APP_INT_ON_TX_FRAME | APP_INT_ON_TIMER);
-
-
- if (chdlc_comm_enable(card) != 0) {
- printk(KERN_INFO "%s: Failed to enable chdlc communications!\n",
- card->devname);
- flags->interrupt_info_struct.interrupt_permission = 0;
- card->u.c.comm_enabled=0;
- chdlc_set_intr_mode(card,0);
- return 0;
- }
-
- /* Initialize Rx/Tx buffer control fields */
- port_set_state(card, WAN_CONNECTING);
- return 0;
-}
-
-
-static void send_ppp_term_request(struct net_device *dev)
-{
- struct sk_buff *new_skb;
- unsigned char *buf;
-
- 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;
- new_skb->mac.raw = new_skb->data;
-
- netif_rx(new_skb);
- dev->last_rx = jiffies;
- }
-}
-
-
-MODULE_LICENSE("GPL");
-
-/****** End ****************************************************************/