patch-2.4.4 linux/drivers/net/wan/wanpipe_multppp.c
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- Lines: 2472
- Date:
Fri Apr 20 11:54:22 2001
- Orig file:
v2.4.3/linux/drivers/net/wan/wanpipe_multppp.c
- Orig date:
Wed Dec 31 16:00:00 1969
diff -u --recursive --new-file v2.4.3/linux/drivers/net/wan/wanpipe_multppp.c linux/drivers/net/wan/wanpipe_multppp.c
@@ -0,0 +1,2471 @@
+/*****************************************************************************
+* 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/version.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/malloc.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/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>
+
+
+#if defined(LINUX_2_1) || defined(LINUX_2_4)
+ #include <linux/inetdevice.h>
+ #include <asm/uaccess.h>
+
+#if LINUX_VERSION_CODE >= KERNEL_VERSION(2,4,3)
+ #include <net/syncppp.h>
+#else
+ #include "syncppp.h"
+#endif
+
+#else
+ #include <net/route.h> /* Adding new route entries */
+#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 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 (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);
+#if defined(LINUX_2_1) || defined(LINUX_2_4)
+static struct net_device_stats* if_stats (netdevice_t* dev);
+#else
+static struct enet_statistics* if_stats (netdevice_t* dev);
+#endif
+
+#ifdef LINUX_2_4
+static void if_tx_timeout (netdevice_t *dev);
+#endif
+
+/* 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, netdevice_t *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, netdevice_t* dev,
+ chdlc_private_area_t* chdlc_priv_area);
+static int process_udp_mgmt_pkt(sdla_t* card, netdevice_t* 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 (netdevice_t*);
+
+
+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;
+ while (mb->return_code != 'I') /* Wait 1s for board to initialize */
+ if ((jiffies - timeout) > 1*HZ) 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(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(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 (wan_device_t* wandev)
+{
+ sdla_t* card = wandev->private;
+ netdevice_t* 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;
+ for(;;) {
+ if(chdlc_priv_area->update_comms_stats == 0)
+ break;
+ if ((jiffies - timeout) > (1 * HZ)){
+ 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 (wan_device_t* wandev, netdevice_t* pdev, wanif_conf_t* conf)
+{
+
+ struct ppp_device *pppdev = (struct ppp_device *)pdev;
+ netdevice_t *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 */
+
+ /* 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);
+ #if LINUX_VERSION_CODE >= KERNEL_VERSION(2,2,16)
+ dev = pppdev->dev;
+ #else
+ dev = &pppdev->dev;
+ #endif
+ sp = &pppdev->sppp;
+
+ /* Enable PPP Debugging */
+ // FIXME Fix this up somehow
+ //sp->pp_flags |= PP_DEBUG;
+ sp->pp_flags &= ~PP_CISCO;
+
+ #ifdef LINUX_2_4
+ strcpy(dev->name,card->u.c.if_name);
+ #else
+ dev->name = (char *)kmalloc(strlen(card->u.c.if_name) + 2, GFP_KERNEL);
+ sprintf(dev->name, "%s", card->u.c.if_name);
+ #endif
+
+ dev->init = &if_init;
+ dev->priv = chdlc_priv_area;
+
+ return 0;
+}
+
+
+
+
+/*============================================================================
+ * Delete logical channel.
+ */
+static int del_if (wan_device_t* wandev, netdevice_t* 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 (netdevice_t* dev)
+ {
+ chdlc_private_area_t* chdlc_priv_area = dev->priv;
+ sdla_t* card = chdlc_priv_area->card;
+ wan_device_t* wandev = &card->wandev;
+ #ifdef LINUX_2_0
+ int i;
+ #endif
+
+ /* 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;
+ #ifdef LINUX_2_4
+ dev->tx_timeout = &if_tx_timeout;
+ dev->watchdog_timeo = TX_TIMEOUT;
+ #endif
+
+
+ #ifdef LINUX_2_0
+ dev->family = AF_INET;
+ #endif
+
+ /* 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;
+
+ /* Initialize socket buffers */
+ #if !defined(LINUX_2_1) && !defined(LINUX_2_4)
+ for (i = 0; i < DEV_NUMBUFFS; ++i)
+ skb_queue_head_init(&dev->buffs[i]);
+ #endif
+
+ return 0;
+}
+
+
+#ifdef LINUX_2_4
+/*============================================================================
+ * Handle transmit timeout event from netif watchdog
+ */
+static void if_tx_timeout (netdevice_t *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);
+}
+#endif
+
+
+
+/*============================================================================
+ * 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)
+{
+ 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 */
+
+ #ifdef LINUX_2_4
+ if (netif_running(dev))
+ return -EBUSY;
+ #else
+ if (dev->start)
+ return -EBUSY; /* only one open is allowed */
+ #endif
+
+ /* Start PPP Layer */
+ if (sppp_open(dev)){
+ return -EIO;
+ }
+
+ do_gettimeofday(&tv);
+ chdlc_priv_area->router_start_time = tv.tv_sec;
+
+ #ifdef LINUX_2_4
+ netif_start_queue(dev);
+ #else
+ dev->interrupt = 0;
+ dev->tbusy = 0;
+ dev->start = 1;
+ #endif
+
+ 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 (netdevice_t* dev)
+{
+ chdlc_private_area_t* chdlc_priv_area = dev->priv;
+ sdla_t* card = chdlc_priv_area->card;
+
+ /* Stop the PPP Layer */
+ sppp_close(dev);
+ stop_net_queue(dev);
+
+ #ifndef LINUX_2_4
+ 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)
+{
+ 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;
+
+ #ifdef LINUX_2_4
+ netif_stop_queue(dev);
+ #endif
+
+
+ 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;
+ }
+
+ #ifndef LINUX_2_4
+ 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 - chdlc_priv_area->tick_counter) < (5 * HZ)) {
+ return 1;
+ }
+
+ printk (KERN_INFO "%s: Transmit (tbusy) timeout !\n",
+ card->devname);
+
+ /* unbusy the interface */
+ dev->tbusy = 0;
+ }
+ #endif
+
+ 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;
+ }
+ start_net_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;
+ start_net_queue(dev);
+ goto if_send_crit_exit;
+ }
+
+ if (card->wandev.state != WAN_CONNECTED){
+ ++card->wandev.stats.tx_dropped;
+ start_net_queue(dev);
+ goto if_send_crit_exit;
+ }
+
+ if (chdlc_send(card, skb->data, skb->len)){
+ stop_net_queue(dev);
+
+ }else{
+ ++card->wandev.stats.tx_packets;
+ #if defined(LINUX_2_1) || defined(LINUX_2_4)
+ card->wandev.stats.tx_bytes += skb->len;
+ #endif
+ #ifdef LINUX_2_4
+ dev->trans_start = jiffies;
+ #endif
+ start_net_queue(dev);
+ }
+
+if_send_crit_exit:
+ if (!(err=is_queue_stopped(dev))){
+ wan_dev_kfree_skb(skb, FREE_WRITE);
+ }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.
+ */
+#if defined(LINUX_2_1) || defined(LINUX_2_4)
+static struct net_device_stats* if_stats (netdevice_t* 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;
+}
+#else
+static struct enet_statistics* if_stats (netdevice_t* dev)
+{
+ sdla_t *my_card;
+ chdlc_private_area_t* chdlc_priv_area = dev->priv;
+
+ /* 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;
+}
+#endif
+
+/****** 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)
+{
+ netdevice_t* 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;
+
+ wake_net_dev(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)
+{
+ netdevice_t *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;
+ }
+
+ #ifdef LINUX_2_4
+ if (!netif_running(dev)){
+ goto rx_exit;
+ }
+ #else
+ if (!dev->start){
+ goto rx_exit;
+ }
+ #endif
+
+ 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 ++;
+#if defined(LINUX_2_1) || defined(LINUX_2_4)
+ card->wandev.stats.rx_bytes += skb->len;
+#endif
+ 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);
+ }
+
+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)
+{
+ netdevice_t* 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, netdevice_t* 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)
+ wan_dev_kfree_skb(skb, FREE_WRITE);
+ else
+ wan_dev_kfree_skb(skb, FREE_READ);
+
+ return(udp_pkt_stored);
+}
+
+
+/*=============================================================================
+ * Process UDP management packet.
+ */
+
+static int process_udp_mgmt_pkt(sdla_t* card, netdevice_t* 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;
+#if defined(LINUX_2_1) || defined(LINUX_2_4)
+ card->wandev.stats.tx_bytes += len;
+#endif
+ }
+ } 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);
+ } 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, netdevice_t *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 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 ++) {
+ 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)
+{
+ netdevice_t *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)
+{
+ #if defined(__SMP__) || defined(LINUX_2_4)
+ 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);
+ }
+ #else
+ disable_irq(card->hw.irq);
+ #endif
+}
+
+void s508_unlock (sdla_t *card, unsigned long *smp_flags)
+{
+ #if defined(__SMP__) || defined(LINUX_2_4)
+ if (card->next){
+ spin_unlock(&card->next->wandev.lock);
+ }
+ spin_unlock_irqrestore(&card->wandev.lock, *smp_flags);
+ #else
+ enable_irq(card->hw.irq);
+ #endif
+}
+
+
+
+/*===========================================================================
+ * 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 = 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 (netdevice_t *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);
+ }
+}
+
+
+/****** End ****************************************************************/
FUNET's LINUX-ADM group, linux-adm@nic.funet.fi
TCL-scripts by Sam Shen (who was at: slshen@lbl.gov)