patch-2.4.4 linux/drivers/net/wan/sdla_chdlc.c
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- Lines: 4103
- Date:
Fri Apr 20 11:54:22 2001
- Orig file:
v2.4.3/linux/drivers/net/wan/sdla_chdlc.c
- Orig date:
Tue Mar 6 19:44:36 2001
diff -u --recursive --new-file v2.4.3/linux/drivers/net/wan/sdla_chdlc.c linux/drivers/net/wan/sdla_chdlc.c
@@ -4,14 +4,40 @@
* Authors: Nenad Corbic <ncorbic@sangoma.com>
* Gideon Hack
*
-* Copyright: (c) 1995-1999 Sangoma Technologies Inc.
+* 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.
* ============================================================================
-* Feb 28, 2000 Jeff Garzik softnet updates
+* Feb 28, 2001 Nenad Corbic Updated if_tx_timeout() routine for
+* 2.4.X kernels.
+* Jan 25, 2001 Nenad Corbic Added a TTY Sync serial driver over the
+* HDLC streaming protocol
+* Added a TTY Async serial driver over the
+* Async protocol.
+* Dec 15, 2000 Nenad Corbic Updated for 2.4.X Kernel support
+* Nov 13, 2000 Nenad Corbic Added true interface type encoding option.
+* Tcpdump doesn't support CHDLC inteface
+* types, to fix this "true type" option will set
+* the interface type to RAW IP mode.
+* Nov 07, 2000 Nenad Corbic Added security features for UDP debugging:
+* Deny all and specify allowed requests.
+* Jun 20, 2000 Nenad Corbic Fixed the API IP ERROR bug. Caused by the
+* latest update.
+* May 09, 2000 Nenad Corbic Option to bring down an interface
+* upon disconnect.
+* Mar 23, 2000 Nenad Corbic Improved task queue, bh handling.
+* Mar 16, 2000 Nenad Corbic Fixed the SLARP Dynamic IP addressing.
+* Mar 06, 2000 Nenad Corbic Bug Fix: corrupted mbox recovery.
+* Feb 10, 2000 Gideon Hack Added ASYNC support.
+* Feb 09, 2000 Nenad Corbic Fixed two shutdown bugs in update() and
+* if_stats() functions.
+* Jan 24, 2000 Nenad Corbic Fixed a startup wanpipe state racing,
+* condition between if_open and isr.
+* Jan 10, 2000 Nenad Corbic Added new socket API support.
+* Dev 15, 1999 Nenad Corbic Fixed up header files for 2.0.X kernels
* Nov 20, 1999 Nenad Corbic Fixed zero length API bug.
* Sep 30, 1999 Nenad Corbic Fixed dynamic IP and route setup.
* Sep 23, 1999 Nenad Corbic Added SMP support, fixed tracing
@@ -22,18 +48,26 @@
* Aug 07, 1998 David Fong Initial version.
*****************************************************************************/
-#include <linux/config.h>
#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/slab.h> /* kmalloc(), kfree() */
+#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/inetdevice.h>
-#include <asm/uaccess.h>
+
+
+#if defined(LINUX_2_1) || defined(LINUX_2_4)
+ #include <asm/uaccess.h>
+ #include <linux/inetdevice.h>
+ #include <linux/netdevice.h>
+#else
+ #include <asm/segment.h>
+ #include <net/route.h> /* Adding new route entries : 2.0.X kernels */
+#endif
+
#include <linux/in.h> /* sockaddr_in */
#include <linux/inet.h>
#include <linux/if.h>
@@ -42,32 +76,42 @@
#include <asm/io.h>
#include <linux/sdla_chdlc.h> /* CHDLC firmware API definitions */
+#include <linux/sdla_asy.h> /* CHDLC (async) API definitions */
-/****** Defines & Macros ****************************************************/
+#include <linux/if_wanpipe_common.h> /* Socket Driver common area */
+#include <linux/if_wanpipe.h>
+
+/* TTY Includes */
+#include <linux/tty.h>
+#include <linux/tty_flip.h>
+#include <linux/serial.h>
-#ifdef _DEBUG_
-#define STATIC
-#else
-#define STATIC static
-#endif
+
+/****** Defines & Macros ****************************************************/
/* reasons for enabling the timer interrupt on the adapter */
-#define TMR_INT_ENABLED_UDP 0x0001
-#define TMR_INT_ENABLED_UPDATE 0x0002
-
+#define TMR_INT_ENABLED_UDP 0x01
+#define TMR_INT_ENABLED_UPDATE 0x02
+#define TMR_INT_ENABLED_CONFIG 0x10
+
+#define MAX_IP_ERRORS 10
+
+#define TTY_CHDLC_MAX_MTU 2000
#define CHDLC_DFLT_DATA_LEN 1500 /* default MTU */
#define CHDLC_HDR_LEN 1
-#define IFF_POINTTOPOINT 0x10
-
-#define WANPIPE 0x00
-#define API 0x01
#define CHDLC_API 0x01
#define PORT(x) (x == 0 ? "PRIMARY" : "SECONDARY" )
+#define MAX_BH_BUFF 10
+
+//#define PRINT_DEBUG
+#ifdef PRINT_DEBUG
+#define dbg_printk(format, a...) printk(format, ## a)
+#else
+#define dbg_printk(format, a...)
+#endif
-#define TX_TIMEOUT (5*HZ)
-
/******Data Structures*****************************************************/
/* This structure is placed in the private data area of the device structure.
@@ -77,9 +121,7 @@
typedef struct chdlc_private_area
{
- /* This member must be first. */
- struct net_device *slave; /* WAN slave */
-
+ wanpipe_common_t common;
sdla_t *card;
int TracingEnabled; /* For enabling Tracing */
unsigned long curr_trace_addr; /* Used for Tracing */
@@ -96,12 +138,38 @@
unsigned long router_up_time;
u32 IP_address; /* IP addressing */
u32 IP_netmask;
+ u32 ip_local;
+ u32 ip_remote;
+ u32 ip_local_tmp;
+ u32 ip_remote_tmp;
+ u8 ip_error;
+ u8 config_chdlc;
+ u8 config_chdlc_timeout;
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 */
+
+#if defined(LINUX_2_1) || defined(LINUX_2_4)
+ bh_data_t *bh_head; /* Circular buffer for chdlc_bh */
+ unsigned long tq_working;
+ volatile int bh_write;
+ volatile int bh_read;
+ atomic_t bh_buff_used;
+#endif
+
+ unsigned char interface_down;
+
+ /* Polling task queue. Each interface
+ * has its own task queue, which is used
+ * to defer events from the interrupt */
+ struct tq_struct poll_task;
+ struct timer_list poll_delay_timer;
+
+ u8 gateway;
+ u8 true_if_encoding;
//FIXME: add driver stats as per frame relay!
} chdlc_private_area_t;
@@ -125,41 +193,47 @@
/****** 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, struct net_device* dev,
+static int new_if (wan_device_t* wandev, netdevice_t* dev,
wanif_conf_t* conf);
-static int del_if (wan_device_t* 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 void if_tx_timeout (struct net_device *dev);
-static int if_header (struct sk_buff* skb, struct net_device* dev,
+static int if_init (netdevice_t* dev);
+static int if_open (netdevice_t* dev);
+static int if_close (netdevice_t* dev);
+static int if_header (struct sk_buff* skb, netdevice_t* dev,
unsigned short type, void* daddr, void* saddr, unsigned len);
-#ifdef LINUX_2_1
-static int if_rebuild_hdr (struct sk_buff *skb);
+
+#if defined(LINUX_2_1) || defined(LINUX_2_4)
+ static int if_rebuild_hdr (struct sk_buff *skb);
+ static struct net_device_stats* if_stats (netdevice_t* dev);
+
#else
-static int if_rebuild_hdr (void* hdr, struct net_device* dev, unsigned long raddr,
+ static int if_rebuild_hdr (void* hdr, netdevice_t* dev, unsigned long raddr,
struct sk_buff* skb);
+ static struct enet_statistics* if_stats (netdevice_t* dev);
#endif
-static int if_send (struct sk_buff* skb, struct net_device* dev);
-static struct net_device_stats* if_stats (struct net_device* dev);
+
+static int if_send (struct sk_buff* skb, netdevice_t* dev);
/* CHDLC Firmware interface functions */
static int chdlc_configure (sdla_t* card, void* data);
static int chdlc_comm_enable (sdla_t* card);
-static int chdlc_comm_disable (sdla_t* card);
static int chdlc_read_version (sdla_t* card, char* str);
static int chdlc_set_intr_mode (sdla_t* card, unsigned mode);
static int 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 chdlc_error (sdla_t *card, int err, CHDLC_MAILBOX_STRUCT *mb);
+
+static int chdlc_disable_comm_shutdown (sdla_t *card);
+#ifdef LINUX_2_4
+ static void if_tx_timeout (netdevice_t *dev);
+#endif
/* 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 void init_chdlc_tx_rx_buff( sdla_t* card);
static int process_chdlc_exception(sdla_t *card);
static int process_global_exception(sdla_t *card);
static int update_comms_stats(sdla_t* card,
@@ -168,23 +242,40 @@
static int unconfigure_ip (sdla_t* card);
static void process_route(sdla_t *card);
static void port_set_state (sdla_t *card, int);
+static int config_chdlc (sdla_t *card);
+static void disable_comm (sdla_t *card);
+
+static void trigger_chdlc_poll (netdevice_t *);
+static void chdlc_poll (netdevice_t *);
+static void chdlc_poll_delay (unsigned long dev_ptr);
+
+/* Miscellaneous asynchronous interface Functions */
+static int set_asy_config (sdla_t* card);
+static int asy_comm_enable (sdla_t* card);
/* Interrupt handlers */
static void wpc_isr (sdla_t* card);
static void rx_intr (sdla_t* card);
static void timer_intr(sdla_t *);
+#if defined(LINUX_2_1) || defined(LINUX_2_4)
+ /* Bottom half handlers */
+ static void chdlc_bh (netdevice_t *);
+ static int chdlc_bh_cleanup (netdevice_t *);
+ static int bh_enqueue (netdevice_t *, struct sk_buff *);
+#endif
+
/* Miscellaneous functions */
-static int chk_bcast_mcast_addr(sdla_t* card, struct net_device* dev,
+static int chk_bcast_mcast_addr(sdla_t* card, netdevice_t* dev,
struct sk_buff *skb);
static int reply_udp( unsigned char *data, unsigned int mbox_len );
-static int intr_test( sdla_t* card, struct net_device *dev );
+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,
+ struct sk_buff *skb, netdevice_t* dev,
chdlc_private_area_t* chdlc_priv_area);
-static int process_udp_mgmt_pkt(sdla_t* card, struct net_device* dev,
+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);
@@ -192,6 +283,46 @@
static int Intr_test_counter;
+
+/* TTY Global Definitions */
+
+#if defined(LINUX_2_4) || defined(LINUX_2_1)
+
+#define NR_PORTS 4
+#define WAN_TTY_MAJOR 226
+#define WAN_TTY_MINOR 0
+
+#define WAN_CARD(port) (tty_card_map[port])
+#define MIN_PORT 0
+#define MAX_PORT NR_PORTS-1
+
+#define CRC_LENGTH 2
+
+static int wanpipe_tty_init(sdla_t *card);
+static void wanpipe_tty_receive(sdla_t *, unsigned, unsigned int);
+static void wanpipe_tty_trigger_poll(sdla_t *card);
+
+static struct tty_driver serial_driver, callout_driver;
+static int serial_refcount=1;
+static int tty_init_cnt=0;
+
+static struct serial_state rs_table[NR_PORTS];
+static struct tty_struct *serial_table[NR_PORTS];
+static struct termios *serial_termios[NR_PORTS];
+static struct termios *serial_termios_locked[NR_PORTS];
+
+static char tty_driver_mode=WANOPT_TTY_SYNC;
+
+static char *opt_decode[] = {"NONE","CRTSCTS","XONXOFF-RX",
+ "CRTSCTS XONXOFF-RX","XONXOFF-TX",
+ "CRTSCTS XONXOFF-TX","CRTSCTS XONXOFF"};
+static char *p_decode[] = {"NONE","ODD","EVEN"};
+
+static void* tty_card_map[NR_PORTS] = {NULL,NULL,NULL,NULL};
+
+#endif
+
+
/****** Public Functions ****************************************************/
/*============================================================================
@@ -211,6 +342,7 @@
unsigned char port_num;
int err;
unsigned long max_permitted_baud = 0;
+ SHARED_MEMORY_INFO_STRUCT *flags;
union
{
@@ -234,7 +366,7 @@
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",
+ printk(KERN_INFO "%s: ERROR - %s port used!\n",
card->wandev.name, PORT(conf->comm_port));
return -EINVAL;
}
@@ -242,7 +374,7 @@
card->u.c.comm_port = conf->comm_port;
}
}else{
- printk(KERN_ERR "%s: ERROR - Invalid Port Selected!\n",
+ printk(KERN_INFO "%s: ERROR - Invalid Port Selected!\n",
card->wandev.name);
return -EINVAL;
}
@@ -305,15 +437,11 @@
card->exec = NULL;
card->wandev.update = &update;
card->wandev.new_if = &new_if;
- card->wandev.del_if = &del_if;
- card->wandev.state = WAN_DUALPORT;
+ card->wandev.del_if = NULL;
card->wandev.udp_port = conf->udp_port;
-
+ card->disable_comm = &disable_comm;
card->wandev.new_if_cnt = 0;
- /* This is for the ports link state */
- card->u.c.state = WAN_DISCONNECTED;
-
/* reset the number of times the 'update()' proc has been called */
card->u.c.update_call_count = 0;
@@ -331,18 +459,27 @@
port_num = card->u.c.comm_port;
+ /* in API mode, we can configure for "receive only" buffering */
+ if(card->hw.type == SDLA_S514) {
+ card->u.c.receive_only = conf->receive_only;
+ if(conf->receive_only) {
+ printk(KERN_INFO
+ "%s: Configured for 'receive only' mode\n",
+ card->devname);
+ }
+ }
+
/* Setup Port Bps */
if(card->wandev.clocking) {
-
- if(port_num == WANOPT_PRI) {
+ 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) {
+
+ }else if(port_num == WANOPT_SEC) {
/* For Secondary Port 1 */
max_permitted_baud =
(card->hw.type == SDLA_S514) ?
@@ -357,14 +494,14 @@
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) {
+ if((port_num == WANOPT_PRI) || card->u.c.receive_only) {
+
/* For Primary Port 0 */
card->wandev.mtu =
(conf->mtu >= MIN_LGTH_CHDLC_DATA_CFG) ?
@@ -387,8 +524,6 @@
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);
@@ -406,6 +541,72 @@
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){
+ int err;
+
+ /* Perform interrupt testing */
+ err = intr_test(card);
+
+ if(err || (Intr_test_counter < MAX_INTR_TEST_COUNTER)) {
+ printk(KERN_INFO "%s: Interrupt test failed (%i)\n",
+ card->devname, Intr_test_counter);
+ printk(KERN_INFO "%s: Please choose another interrupt\n",
+ card->devname);
+ return -EIO;
+ }
+
+ printk(KERN_INFO "%s: Interrupt test passed (%i)\n",
+ card->devname, Intr_test_counter);
+ card->configured = 1;
+ }
+
+ if ((card->tty_opt=conf->tty) == WANOPT_YES){
+#if defined(LINUX_2_4) || defined(LINUX_2_1)
+ int err;
+ card->tty_minor = conf->tty_minor;
+
+ /* On ASYNC connections internal clocking
+ * is mandatory */
+ if ((card->u.c.async_mode = conf->tty_mode)){
+ card->wandev.clocking = 1;
+ }
+ err=wanpipe_tty_init(card);
+ if (err){
+ return err;
+ }
+#else
+ printk(KERN_INFO "%s: Error: TTY driver is not supported on 2.0.X kernels!\n",
+ card->devname);
+ return -EINVAL;
+#endif
+ }else{
+
+
+ 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;
+ }
+
+ /* If we are using CHDLC in backup mode, this flag will
+ * indicate not to look for IP addresses in config_chdlc()*/
+ card->u.c.backup = conf->backup;
+
+ printk(KERN_INFO "\n");
+
return 0;
}
@@ -427,8 +628,8 @@
static int update (wan_device_t* wandev)
{
sdla_t* card = wandev->private;
- struct net_device* dev = card->wandev.dev;
- volatile chdlc_private_area_t* chdlc_priv_area = dev->priv;
+ netdevice_t* dev;
+ volatile chdlc_private_area_t* chdlc_priv_area;
SHARED_MEMORY_INFO_STRUCT *flags;
unsigned long timeout;
@@ -442,10 +643,14 @@
/* more sanity checks */
if(!card->u.c.flags)
return -ENODEV;
- if(test_bit(1, (void*)&card->wandev.critical))
+
+ if(test_bit(PERI_CRIT, (void*)&card->wandev.critical))
return -EAGAIN;
- if(!netif_running(dev))
+ if((dev=card->wandev.dev) == NULL)
+ return -ENODEV;
+
+ if((chdlc_priv_area=dev->priv) == NULL)
return -ENODEV;
flags = card->u.c.flags;
@@ -488,13 +693,17 @@
* Return: 0 o.k.
* < 0 failure (channel will not be created)
*/
-static int new_if (wan_device_t* wandev, struct net_device* dev, wanif_conf_t* conf)
+static int new_if (wan_device_t* wandev, netdevice_t* dev, wanif_conf_t* conf)
{
sdla_t* card = wandev->private;
chdlc_private_area_t* chdlc_priv_area;
+
+ printk(KERN_INFO "%s: Configuring Interface: %s\n",
+ card->devname, conf->name);
+
if ((conf->name[0] == '\0') || (strlen(conf->name) > WAN_IFNAME_SZ)) {
- printk(KERN_INFO "%s: invalid interface name!\n",
+ printk(KERN_INFO "%s: Invalid interface name!\n",
card->devname);
return -EINVAL;
}
@@ -506,9 +715,11 @@
return -ENOMEM;
memset(chdlc_priv_area, 0, sizeof(chdlc_private_area_t));
-
+
chdlc_priv_area->card = card;
-
+ chdlc_priv_area->common.sk = NULL;
+ chdlc_priv_area->common.func = NULL;
+
/* initialize data */
strcpy(card->u.c.if_name, conf->name);
@@ -523,110 +734,216 @@
chdlc_priv_area->route_status = NO_ROUTE;
chdlc_priv_area->route_removed = 0;
- /* Setup protocol options */
-
- card->u.c.protocol_options = 0;
-
- if (conf->ignore_dcd == WANOPT_YES){
- card->u.c.protocol_options |= IGNORE_DCD_FOR_LINK_STAT;
- }
+ card->u.c.async_mode = conf->async_mode;
+
+ /* setup for asynchronous mode */
+ if(conf->async_mode) {
+ printk(KERN_INFO "%s: Configuring for asynchronous mode\n",
+ wandev->name);
- if (conf->ignore_cts == WANOPT_YES){
- card->u.c.protocol_options |= IGNORE_CTS_FOR_LINK_STAT;
- }
+ if(card->u.c.comm_port == WANOPT_PRI) {
+ printk(KERN_INFO
+ "%s:Asynchronous mode on secondary port only\n",
+ wandev->name);
+ kfree(chdlc_priv_area);
+ return -EINVAL;
+ }
- if (conf->ignore_keepalive == WANOPT_YES) {
- card->u.c.protocol_options |= IGNORE_KPALV_FOR_LINK_STAT;
- card->u.c.kpalv_tx = MIN_Tx_KPALV_TIMER;
- card->u.c.kpalv_rx = MIN_Rx_KPALV_TIMER;
- card->u.c.kpalv_err = MIN_KPALV_ERR_TOL;
+ if(strcmp(conf->usedby, "WANPIPE") == 0) {
+ printk(KERN_INFO
+ "%s: Running in WANIPE Async Mode\n", wandev->name);
+ card->u.c.usedby = WANPIPE;
+ }else{
+ card->u.c.usedby = API;
+ }
- } else { /* Do not ignore keepalives */
+ if(!card->wandev.clocking) {
+ printk(KERN_INFO
+ "%s: Asynch. clocking must be 'Internal'\n",
+ wandev->name);
+ kfree(chdlc_priv_area);
+ return -EINVAL;
+ }
- card->u.c.kpalv_tx =
- (conf->keepalive_tx_tmr - MIN_Tx_KPALV_TIMER) >= 0 ?
- min (conf->keepalive_tx_tmr, MAX_Tx_KPALV_TIMER) :
- DEFAULT_Tx_KPALV_TIMER;
+ if((card->wandev.bps < MIN_ASY_BAUD_RATE) ||
+ (card->wandev.bps > MAX_ASY_BAUD_RATE)) {
+ printk(KERN_INFO "%s: Selected baud rate is invalid.\n",
+ wandev->name);
+ printk(KERN_INFO "Must be between %u and %u bps.\n",
+ MIN_ASY_BAUD_RATE, MAX_ASY_BAUD_RATE);
+ kfree(chdlc_priv_area);
+ return -EINVAL;
+ }
- card->u.c.kpalv_rx =
- (conf->keepalive_rx_tmr - MIN_Rx_KPALV_TIMER) >= 0 ?
- min (conf->keepalive_rx_tmr, MAX_Rx_KPALV_TIMER) :
- DEFAULT_Rx_KPALV_TIMER;
+ card->u.c.api_options = 0;
+ if (conf->asy_data_trans == WANOPT_YES) {
+ card->u.c.api_options |= ASY_RX_DATA_TRANSPARENT;
+ }
+
+ card->u.c.protocol_options = 0;
+ if (conf->rts_hs_for_receive == WANOPT_YES) {
+ card->u.c.protocol_options |= ASY_RTS_HS_FOR_RX;
+ }
+ if (conf->xon_xoff_hs_for_receive == WANOPT_YES) {
+ card->u.c.protocol_options |= ASY_XON_XOFF_HS_FOR_RX;
+ }
+ if (conf->xon_xoff_hs_for_transmit == WANOPT_YES) {
+ card->u.c.protocol_options |= ASY_XON_XOFF_HS_FOR_TX;
+ }
+ if (conf->dcd_hs_for_transmit == WANOPT_YES) {
+ card->u.c.protocol_options |= ASY_DCD_HS_FOR_TX;
+ }
+ if (conf->cts_hs_for_transmit == WANOPT_YES) {
+ card->u.c.protocol_options |= ASY_CTS_HS_FOR_TX;
+ }
- card->u.c.kpalv_err =
- (conf->keepalive_err_margin - MIN_KPALV_ERR_TOL) >= 0 ?
- min (conf->keepalive_err_margin, MAX_KPALV_ERR_TOL) :
- DEFAULT_KPALV_ERR_TOL;
- }
+ card->u.c.tx_bits_per_char = conf->tx_bits_per_char;
+ card->u.c.rx_bits_per_char = conf->rx_bits_per_char;
+ card->u.c.stop_bits = conf->stop_bits;
+ card->u.c.parity = conf->parity;
+ card->u.c.break_timer = conf->break_timer;
+ card->u.c.inter_char_timer = conf->inter_char_timer;
+ card->u.c.rx_complete_length = conf->rx_complete_length;
+ card->u.c.xon_char = conf->xon_char;
+
+ } else { /* setup for synchronous mode */
+
+ card->u.c.protocol_options = 0;
+ if (conf->ignore_dcd == WANOPT_YES){
+ card->u.c.protocol_options |= IGNORE_DCD_FOR_LINK_STAT;
+ }
+ if (conf->ignore_cts == WANOPT_YES){
+ card->u.c.protocol_options |= IGNORE_CTS_FOR_LINK_STAT;
+ }
+ if (conf->ignore_keepalive == WANOPT_YES) {
+ card->u.c.protocol_options |=
+ IGNORE_KPALV_FOR_LINK_STAT;
+ card->u.c.kpalv_tx = MIN_Tx_KPALV_TIMER;
+ card->u.c.kpalv_rx = MIN_Rx_KPALV_TIMER;
+ card->u.c.kpalv_err = MIN_KPALV_ERR_TOL;
+
+ } else { /* Do not ignore keepalives */
+ card->u.c.kpalv_tx =
+ ((conf->keepalive_tx_tmr - MIN_Tx_KPALV_TIMER)
+ >= 0) ?
+ min(conf->keepalive_tx_tmr,MAX_Tx_KPALV_TIMER) :
+ DEFAULT_Tx_KPALV_TIMER;
+
+ card->u.c.kpalv_rx =
+ ((conf->keepalive_rx_tmr - MIN_Rx_KPALV_TIMER)
+ >= 0) ?
+ min(conf->keepalive_rx_tmr,MAX_Rx_KPALV_TIMER) :
+ DEFAULT_Rx_KPALV_TIMER;
+
+ card->u.c.kpalv_err =
+ ((conf->keepalive_err_margin-MIN_KPALV_ERR_TOL)
+ >= 0) ?
+ min(conf->keepalive_err_margin,
+ MAX_KPALV_ERR_TOL) :
+ DEFAULT_KPALV_ERR_TOL;
+ }
- /* Setup slarp timer to control delay between slarps
- */
- card->u.c.slarp_timer =
- (conf->slarp_timer - MIN_SLARP_REQ_TIMER) >=0 ?
- min (conf->slarp_timer, MAX_SLARP_REQ_TIMER) :
- DEFAULT_SLARP_REQ_TIMER;
+ /* Setup slarp timer to control delay between slarps */
+ card->u.c.slarp_timer =
+ ((conf->slarp_timer - MIN_SLARP_REQ_TIMER) >= 0) ?
+ min (conf->slarp_timer, MAX_SLARP_REQ_TIMER) :
+ DEFAULT_SLARP_REQ_TIMER;
+
+#ifdef LINUX_2_0
+ if (card->u.c.slarp_timer){
+ printk(KERN_INFO
+ "%s: Error: Dynamic IP support not available for 2.0.X kernels\n",
+ card->devname);
+ printk(KERN_INFO "%s: Defaulting to Static IP addressing\n",
+ card->devname);
+ }
+ card->u.c.slarp_timer=0;
+#endif
- /* If HDLC_STRAMING is enabled then IGNORE DCD, CTS and KEEPALIVES
- * are automatically ignored
- */
- if (conf->hdlc_streaming == WANOPT_YES) {
- printk(KERN_INFO "%s: Enabling HDLC STREAMING Mode\n",
- wandev->name);
- card->u.c.protocol_options = HDLC_STREAMING_MODE;
- }
+ if (conf->hdlc_streaming == WANOPT_YES) {
+ printk(KERN_INFO "%s: Enabling HDLC STREAMING Mode\n",
+ wandev->name);
+ card->u.c.protocol_options = HDLC_STREAMING_MODE;
+ }
+ if ((chdlc_priv_area->true_if_encoding = conf->true_if_encoding) == WANOPT_YES){
+ printk(KERN_INFO
+ "%s: Enabling, true interface type encoding.\n",
+ card->devname);
+ }
+
+ /* Setup wanpipe as a router (WANPIPE) or as an API */
+ if( strcmp(conf->usedby, "WANPIPE") == 0) {
- /* Setup wanpipe as a router (WANPIPE) or as an API */
- if( strcmp(conf->usedby, "WANPIPE") == 0) {
- printk(KERN_INFO "%s: Running in WANPIPE mode !\n",wandev->name);
- card->u.c.usedby = WANPIPE;
-
- } else if( strcmp(conf->usedby, "API") == 0){
-
-#ifdef CHDLC_API
- card->u.c.usedby = API;
- printk(KERN_INFO "%s: Running in API mode !\n",wandev->name);
+ printk(KERN_INFO "%s: Running in WANPIPE mode!\n",
+ wandev->name);
+ card->u.c.usedby = WANPIPE;
+
+ /* Option to bring down the interface when
+ * the link goes down */
+ if (conf->if_down){
+ set_bit(DYN_OPT_ON,&chdlc_priv_area->interface_down);
+ printk(KERN_INFO
+ "%s: Dynamic interface configuration enabled\n",
+ card->devname);
+ }
+
+ } else if( strcmp(conf->usedby, "API") == 0) {
+#if defined(LINUX_2_1) || defined(LINUX_2_4)
+ card->u.c.usedby = API;
+ printk(KERN_INFO "%s: Running in API mode !\n",
+ wandev->name);
#else
- printk(KERN_INFO "%s: API Mode is not supported!\n",
- wandev->name);
- printk(KERN_INFO "%s: Chdlc API patch can be obtained from Sangoma Tech.\n",
- wandev->name);
- kfree(chdlc_priv_area);
- return -EINVAL;
+ printk(KERN_INFO "%s: API Mode is not supported for kernels lower than 2.2.X!\n",
+ wandev->name);
+ printk(KERN_INFO "%s: Please upgrade to a 2.2.X kernel fro the API support\n",
+ wandev->name);
+ kfree(chdlc_priv_area);
+ return -EINVAL;
#endif
+ }
}
+#if defined(LINUX_2_1) || defined(LINUX_2_4)
+ /* Tells us that if this interface is a
+ * gateway or not */
+ if ((chdlc_priv_area->gateway = conf->gateway) == WANOPT_YES){
+ printk(KERN_INFO "%s: Interface %s is set as a gateway.\n",
+ card->devname,card->u.c.if_name);
+ }
+#endif
/* Get Multicast Information */
chdlc_priv_area->mc = conf->mc;
/* prepare network device data space for registration */
- strcpy(dev->name, card->u.c.if_name);
+#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, struct net_device* dev)
-{
-
-/* FIXME: This code generates kernel panic during
- router stop!. Investigate futher.
- (Error is dereferencing a NULL pointer)
-
- if(dev->priv){
-
- kfree(dev->priv);
- dev->priv = NULL;
+ /* Initialize the polling task routine */
+#ifndef LINUX_2_4
+ chdlc_priv_area->poll_task.next = NULL;
+#endif
+ chdlc_priv_area->poll_task.sync=0;
+ chdlc_priv_area->poll_task.routine = (void*)(void*)chdlc_poll;
+ chdlc_priv_area->poll_task.data = dev;
+
+ /* Initialize the polling delay timer */
+ init_timer(&chdlc_priv_area->poll_delay_timer);
+ chdlc_priv_area->poll_delay_timer.data = (unsigned long)dev;
+ chdlc_priv_area->poll_delay_timer.function = chdlc_poll_delay;
+
+ printk(KERN_INFO "\n");
- }
-*/
return 0;
}
@@ -640,12 +957,12 @@
* interface registration. Returning anything but zero will fail interface
* registration.
*/
-static int if_init (struct net_device* dev)
+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;
-#ifndef LINUX_2_1
+#ifdef LINUX_2_0
int i;
#endif
@@ -656,22 +973,41 @@
dev->rebuild_header = &if_rebuild_hdr;
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
+
/* Initialize media-specific parameters */
- dev->flags |= IFF_POINTTOPOINT;
+ dev->flags |= IFF_POINTOPOINT;
+ dev->flags |= IFF_NOARP;
/* Enable Mulitcasting if user selected */
if (chdlc_priv_area->mc == WANOPT_YES){
dev->flags |= IFF_MULTICAST;
}
-
-#ifndef LINUX_2_1
+
+#ifdef LINUX_2_0
dev->family = AF_INET;
#endif
- dev->type = ARPHRD_PPP; /* ARP hw type -- dummy value */
+
+ if (chdlc_priv_area->true_if_encoding){
+#if defined(LINUX_2_1) || defined(LINUX_2_4)
+ dev->type = ARPHRD_HDLC; /* This breaks the tcpdump */
+#else
+ dev->type = ARPHRD_PPP;
+#endif
+ }else{
+ dev->type = ARPHRD_PPP;
+ }
+
dev->mtu = card->wandev.mtu;
+ /* for API usage, add the API header size to the requested MTU size */
+ if(card->u.c.usedby == API) {
+ dev->mtu += sizeof(api_tx_hdr_t);
+ }
+
dev->hard_header_len = CHDLC_HDR_LEN;
/* Initialize hardware parameters */
@@ -688,13 +1024,10 @@
dev->tx_queue_len = 100;
/* Initialize socket buffers */
-#ifdef LINUX_2_1
- dev_init_buffers(dev);
-#else
+#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;
}
@@ -705,85 +1038,63 @@
*
* Return 0 if O.k. or errno.
*/
-static int if_open (struct net_device* dev)
+static int if_open (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;
struct timeval tv;
int err = 0;
/* Only one open per interface is allowed */
- if(netif_running(dev))
+ if (is_dev_running(dev))
return -EBUSY;
-
- if(test_and_set_bit(1, (void*)&card->wandev.critical)) {
- return -EAGAIN;
- }
-
- /* Setup the Board for CHDLC */
- if (set_chdlc_config(card)) {
- clear_bit(1, (void*)&card->wandev.critical);
- return -EIO;
- }
-
- if (!card->configured && !card->wandev.piggyback){
- /* Perform interrupt testing */
- err = intr_test(card, dev);
-
- 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);
- clear_bit(1, (void*)&card->wandev.critical);
- return -EIO;
- }
-
- printk(KERN_INFO "%s: Interrupt test passed (%i)\n",
- card->devname, Intr_test_counter);
- card->configured = 1;
- }else{
- printk(KERN_INFO "%s: Card configured, skip interrupt test\n",
- card->devname);
- }
-
- /* Initialize Rx/Tx buffer control fields */
- 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)){
- clear_bit(1, (void*)&card->wandev.critical);
- return -EIO;
- }
-
-
- /* Mask the Transmit and Timer interrupt */
- flags->interrupt_info_struct.interrupt_permission &=
- ~(APP_INT_ON_TX_FRAME | APP_INT_ON_TIMER);
-
-
- /* Enable communications */
- if (chdlc_comm_enable(card)) {
- clear_bit(1, (void*)&card->wandev.critical);
- return -EIO;
- }
-
- clear_bit(1, (void*)&card->wandev.critical);
+#if defined(LINUX_2_1) || defined(LINUX_2_4)
+ /* Initialize the task queue */
+ chdlc_priv_area->tq_working=0;
- port_set_state(card, WAN_CONNECTING);
+#ifndef LINUX_2_4
+ chdlc_priv_area->common.wanpipe_task.next = NULL;
+#endif
+ chdlc_priv_area->common.wanpipe_task.sync = 0;
+ chdlc_priv_area->common.wanpipe_task.routine = (void *)(void *)chdlc_bh;
+ chdlc_priv_area->common.wanpipe_task.data = dev;
+
+ /* Allocate and initialize BH circular buffer */
+ /* Add 1 to MAX_BH_BUFF so we don't have test with (MAX_BH_BUFF-1) */
+ chdlc_priv_area->bh_head = kmalloc((sizeof(bh_data_t)*(MAX_BH_BUFF+1)),GFP_ATOMIC);
+ memset(chdlc_priv_area->bh_head,0,(sizeof(bh_data_t)*(MAX_BH_BUFF+1)));
+ atomic_set(&chdlc_priv_area->bh_buff_used, 0);
+#endif
+
do_gettimeofday(&tv);
chdlc_priv_area->router_start_time = tv.tv_sec;
-
+
+#ifdef LINUX_2_4
netif_start_queue(dev);
- dev->flags |= IFF_POINTTOPOINT;
+#else
+ dev->interrupt = 0;
+ dev->tbusy = 0;
+ dev->start = 1;
+#endif
+
wanpipe_open(card);
+ /* TTY is configured during wanpipe_set_termios
+ * call, not here */
+ if (card->tty_opt)
+ return err;
+
+ set_bit(0,&chdlc_priv_area->config_chdlc);
+ chdlc_priv_area->config_chdlc_timeout=jiffies;
+ del_timer(&chdlc_priv_area->poll_delay_timer);
+
+ /* Start the CHDLC configuration after 1sec delay.
+ * This will give the interface initilization time
+ * to finish its configuration */
+ chdlc_priv_area->poll_delay_timer.expires=jiffies+HZ;
+ add_timer(&chdlc_priv_area->poll_delay_timer);
return err;
}
@@ -792,25 +1103,76 @@
* o if this is the last close, then disable communications and interrupts.
* o reset flags.
*/
-static int if_close (struct net_device* dev)
+static int if_close (netdevice_t* dev)
{
chdlc_private_area_t* chdlc_priv_area = dev->priv;
sdla_t* card = chdlc_priv_area->card;
- if(test_and_set_bit(1, (void*)&card->wandev.critical))
- return -EAGAIN;
+#if defined(LINUX_2_1) || defined(LINUX_2_4)
- netif_stop_queue(dev);
+ if (chdlc_priv_area->bh_head){
+ int i;
+ struct sk_buff *skb;
+
+ for (i=0; i<(MAX_BH_BUFF+1); i++){
+ skb = ((bh_data_t *)&chdlc_priv_area->bh_head[i])->skb;
+ if (skb != NULL){
+ wan_dev_kfree_skb(skb, FREE_READ);
+ }
+ }
+ kfree(chdlc_priv_area->bh_head);
+ chdlc_priv_area->bh_head=NULL;
+ }
+#endif
+
+ stop_net_queue(dev);
+#ifndef LINUX_2_4
+ dev->start=0;
+#endif
wanpipe_close(card);
- port_set_state(card, WAN_DISCONNECTED);
- chdlc_set_intr_mode(card, 0);
- chdlc_comm_disable(card);
+ del_timer(&chdlc_priv_area->poll_delay_timer);
+ return 0;
+}
- clear_bit(1, (void*)&card->wandev.critical);
+static void disable_comm (sdla_t *card)
+{
+ SHARED_MEMORY_INFO_STRUCT *flags = card->u.c.flags;
+
+ if (card->u.c.comm_enabled){
+ chdlc_disable_comm_shutdown (card);
+ }else{
+ flags->interrupt_info_struct.interrupt_permission = 0;
+ }
- return 0;
+#if defined(LINUX_2_4) || defined(LINUX_2_1)
+ if (!tty_init_cnt)
+ return;
+
+ if (card->tty_opt){
+ struct serial_state * state;
+ if (!(--tty_init_cnt)){
+ int e1,e2;
+ *serial_driver.refcount=0;
+
+ if ((e1 = tty_unregister_driver(&serial_driver)))
+ printk("SERIAL: failed to unregister serial driver (%d)\n",
+ e1);
+ if ((e2 = tty_unregister_driver(&callout_driver)))
+ printk("SERIAL: failed to unregister callout driver (%d)\n",
+ e2);
+ printk(KERN_INFO "%s: Unregistering TTY Driver, Major %i\n",
+ card->devname,WAN_TTY_MAJOR);
+ }
+ card->tty=NULL;
+ tty_card_map[card->tty_minor]=NULL;
+ state = &rs_table[card->tty_minor];
+ memset(state,0,sizeof(state));
+ }
+#endif
+ return;
}
+
/*============================================================================
* Build media header.
*
@@ -820,7 +1182,7 @@
*
* Return: media header length.
*/
-static int if_header (struct sk_buff* skb, struct net_device* dev,
+static int if_header (struct sk_buff* skb, netdevice_t* dev,
unsigned short type, void* daddr, void* saddr, unsigned len)
{
skb->protocol = htons(type);
@@ -828,49 +1190,50 @@
return CHDLC_HDR_LEN;
}
+
+#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
+
+
+
/*============================================================================
* Re-build media header.
*
* Return: 1 physical address resolved.
* 0 physical address not resolved
*/
-#ifdef LINUX_2_1
+#if defined(LINUX_2_1) || defined(LINUX_2_4)
static int if_rebuild_hdr (struct sk_buff *skb)
{
return 1;
}
#else
-static int if_rebuild_hdr (void* hdr, struct net_device* dev, unsigned long raddr,
+static int if_rebuild_hdr (void* hdr, netdevice_t* dev, unsigned long raddr,
struct sk_buff* skb)
{
return 1;
}
#endif
-
-/*============================================================================
- * Handle transmit timeout event from netif watchdog
- */
-static void if_tx_timeout (struct net_device *dev)
-{
- chdlc_private_area_t *chdlc_priv_area = dev->priv;
- sdla_t *card = chdlc_priv_area->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 timeout !\n",
- card->devname);
-
- /* unbusy the interface */
- netif_wake_queue (dev);
-}
-
-
/*============================================================================
* Send a packet on a network interface.
* o set tbusy flag (marks start of the transmission) to block a timer-based
@@ -888,7 +1251,7 @@
* 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)
+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;
@@ -896,33 +1259,68 @@
INTERRUPT_INFORMATION_STRUCT *chdlc_int = &flags->interrupt_info_struct;
int udp_type = 0;
unsigned long smp_flags;
+ int err=0;
- if(skb == NULL) {
+#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: interface %s got kicked!\n",
card->devname, dev->name);
- netif_wake_queue(dev);
+
+ wake_net_dev(dev);
return 0;
}
- if(ntohs(skb->protocol) != 0x16) {
+#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 timeout !\n",
+ card->devname);
+
+ /* unbusy the interface */
+ clear_bit(0,&dev->tbusy);
+ }
+#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 (udp_type == UDP_CPIPE_TYPE){
if(store_udp_mgmt_pkt(UDP_PKT_FRM_STACK, card, skb, dev,
- chdlc_priv_area))
+ chdlc_priv_area)){
chdlc_int->interrupt_permission |=
APP_INT_ON_TIMER;
+ }
+ start_net_queue(dev);
return 0;
}
/* check to see if the source IP address is a broadcast or */
/* multicast IP address */
- if(chk_bcast_mcast_addr(card, dev, skb))
- return 0;
+ if(chk_bcast_mcast_addr(card, dev, skb)){
+ ++card->wandev.stats.tx_dropped;
+ wan_dev_kfree_skb(skb,FREE_WRITE);
+ start_net_queue(dev);
+ return 0;
+ }
}
/* Lock the 508 Card: SMP is supported */
@@ -930,29 +1328,24 @@
s508_lock(card,&smp_flags);
}
- if(test_and_set_bit(0, (void*)&card->wandev.critical)) {
+ 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;
-#ifdef LINUX_2_1
- dev_kfree_skb(skb);
-#else
- dev_kfree_skb(skb, FREE_WRITE);
-#endif
- if(card->hw.type != SDLA_S514){
- s508_unlock(card,&smp_flags);
- }
- return 0;
+ start_net_queue(dev);
+ goto if_send_exit_crit;
}
- if(card->u.c.state != WAN_CONNECTED)
+ if(card->u.c.state != WAN_CONNECTED){
++card->wandev.stats.tx_dropped;
-
- else if(!skb->protocol)
+ start_net_queue(dev);
+
+ }else if(!skb->protocol){
++card->wandev.stats.tx_errors;
-
- else {
+ start_net_queue(dev);
+
+ }else {
void* data = skb->data;
unsigned len = skb->len;
unsigned char attr;
@@ -964,18 +1357,14 @@
if (card->u.c.usedby == API){
api_tx_hdr_t* api_tx_hdr;
- if (len <= sizeof(api_tx_hdr_t)){
-#ifdef LINUX_2_1
- dev_kfree_skb(skb);
-#else
- dev_kfree_skb(skb, FREE_WRITE);
-#endif
+ /* discard the frame if we are configured for */
+ /* 'receive only' mode or if there is no data */
+ if (card->u.c.receive_only ||
+ (len <= sizeof(api_tx_hdr_t))) {
+
++card->wandev.stats.tx_dropped;
- clear_bit(0, (void*)&card->wandev.critical);
- if(card->hw.type != SDLA_S514){
- s508_unlock(card,&smp_flags);
- }
- return 0;
+ start_net_queue(dev);
+ goto if_send_exit_crit;
}
api_tx_hdr = (api_tx_hdr_t *)data;
@@ -985,24 +1374,36 @@
}
if(chdlc_send(card, data, len)) {
- netif_stop_queue(dev);
- chdlc_priv_area->tick_counter = jiffies;
- chdlc_int->interrupt_permission |= APP_INT_ON_TX_FRAME;
- }
- else {
+ stop_net_queue(dev);
+ }else{
++card->wandev.stats.tx_packets;
+#if defined(LINUX_2_1) || defined(LINUX_2_4)
card->wandev.stats.tx_bytes += len;
+#endif
+
+ start_net_queue(dev);
+
+#ifdef LINUX_2_4
+ dev->trans_start = jiffies;
+#endif
}
}
- if (!netif_queue_stopped(dev))
- dev_kfree_skb(skb);
+if_send_exit_crit:
+
+ 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(0, (void*)&card->wandev.critical);
+ clear_bit(SEND_CRIT, (void*)&card->wandev.critical);
if(card->hw.type != SDLA_S514){
s508_unlock(card,&smp_flags);
}
- return netif_queue_stopped(dev);
+
+ return err;
}
@@ -1011,19 +1412,19 @@
* multicast source IP address.
*/
-static int chk_bcast_mcast_addr(sdla_t *card, struct net_device* dev,
+static int chk_bcast_mcast_addr(sdla_t *card, netdevice_t* dev,
struct sk_buff *skb)
{
u32 src_ip_addr;
u32 broadcast_ip_addr = 0;
-#ifdef LINUX_2_1
+#if defined(LINUX_2_1) || defined(LINUX_2_4)
struct in_device *in_dev;
#endif
/* read the IP source address from the outgoing packet */
src_ip_addr = *(u32 *)(skb->data + 12);
/* read the IP broadcast address for the device */
-#ifdef LINUX_2_1
+#if defined(LINUX_2_1) || defined(LINUX_2_4)
in_dev = dev->ip_ptr;
if(in_dev != NULL) {
struct in_ifaddr *ifa= in_dev->ifa_list;
@@ -1040,12 +1441,6 @@
if((dev->flags & IFF_BROADCAST) && (src_ip_addr == broadcast_ip_addr)) {
printk(KERN_INFO "%s: Broadcast Source Address silently discarded\n",
card->devname);
-#ifdef LINUX_2_1
- dev_kfree_skb(skb);
-#else
- dev_kfree_skb(skb, FREE_WRITE);
-#endif
- ++card->wandev.stats.tx_dropped;
return 1;
}
@@ -1054,12 +1449,6 @@
(ntohl(src_ip_addr) <= 0xFFFFFFFE)) {
printk(KERN_INFO "%s: Multicast Source Address silently discarded\n",
card->devname);
-#ifdef LINUX_2_1
- dev_kfree_skb(skb);
-#else
- dev_kfree_skb(skb, FREE_WRITE);
-#endif
- ++card->wandev.stats.tx_dropped;
return 1;
}
@@ -1169,23 +1558,29 @@
/*============================================================================
* Get ethernet-style interface statistics.
- * Return a pointer to struct net_device_stats.
+ * Return a pointer to struct enet_statistics.
*/
-#ifdef LINUX_2_1
-static struct net_device_stats* if_stats (struct net_device* dev)
+#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 = dev->priv;
+ chdlc_private_area_t* chdlc_priv_area;
+
+ if ((chdlc_priv_area=dev->priv) == NULL)
+ return NULL;
my_card = chdlc_priv_area->card;
return &my_card->wandev.stats;
}
#else
-static struct net_device_stats* if_stats (struct net_device* dev)
+static struct enet_statistics* if_stats (netdevice_t* dev)
{
sdla_t *my_card;
chdlc_private_area_t* chdlc_priv_area = dev->priv;
+ if ((chdlc_priv_area=dev->priv) == NULL)
+ return NULL;
+
my_card = chdlc_priv_area->card;
return &my_card->wandev.stats;
}
@@ -1261,44 +1656,63 @@
}
-/*============================================================================
- * Enable communications.
- */
+/*===========================================================
+ * chdlc_disable_comm_shutdown
+ *
+ * Shutdown() disables the communications. We must
+ * have a sparate functions, because we must not
+ * call chdlc_error() hander since the private
+ * area has already been replaced */
-static int chdlc_comm_enable (sdla_t* card)
+static int chdlc_disable_comm_shutdown (sdla_t *card)
{
- int err;
CHDLC_MAILBOX_STRUCT* mb = card->mbox;
+ CHDLC_INT_TRIGGERS_STRUCT* int_data =
+ (CHDLC_INT_TRIGGERS_STRUCT *)mb->data;
+ int err;
+
+ /* Disable Interrutps */
+ int_data->CHDLC_interrupt_triggers = 0;
+ 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;
+ /* Disable Communications */
+
+ if (card->u.c.async_mode) {
+ mb->command = DISABLE_ASY_COMMUNICATIONS;
+ }else{
+ mb->command = DISABLE_CHDLC_COMMUNICATIONS;
+ }
+
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);
- return err;
+
+ card->u.c.comm_enabled = 0;
+
+ return 0;
}
/*============================================================================
- * Disable communications and Drop the Modem lines (DCD and RTS).
+ * Enable communications.
*/
-static int chdlc_comm_disable (sdla_t* card)
+
+static int chdlc_comm_enable (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);
-
- mb->command = SET_MODEM_STATUS;
- mb->buffer_length = 1;
- mb->data[0] = 0;
+ mb->command = ENABLE_CHDLC_COMMUNICATIONS;
err = sdla_exec(mb) ? mb->return_code : CMD_TIMEOUT;
if (err != COMMAND_OK)
- chdlc_error(card,err,mb);
-
+ chdlc_error(card, err, mb);
+ else
+ card->u.c.comm_enabled = 1;
+
return err;
}
@@ -1397,10 +1811,10 @@
/* 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;
}
@@ -1420,7 +1834,7 @@
switch (err) {
case CMD_TIMEOUT:
- printk(KERN_ERR "%s: command 0x%02X timed out!\n",
+ printk(KERN_INFO "%s: command 0x%02X timed out!\n",
card->devname, cmd);
break;
@@ -1440,17 +1854,112 @@
return 0;
}
+#if defined(LINUX_2_1) || defined(LINUX_2_4)
+/********** Bottom Half Handlers ********************************************/
+
+/* NOTE: There is no API, BH support for Kernels lower than 2.2.X.
+ * DO NOT INSERT ANY CODE HERE, NOTICE THE
+ * PREPROCESSOR STATEMENT ABOVE, UNLESS YOU KNOW WHAT YOU ARE
+ * DOING */
+
+static void chdlc_bh (netdevice_t * dev)
+{
+ chdlc_private_area_t* chan = dev->priv;
+ sdla_t *card = chan->card;
+ struct sk_buff *skb;
+
+ if (atomic_read(&chan->bh_buff_used) == 0){
+ clear_bit(0, &chan->tq_working);
+ return;
+ }
+
+ while (atomic_read(&chan->bh_buff_used)){
+
+ skb = ((bh_data_t *)&chan->bh_head[chan->bh_read])->skb;
+
+ if (skb != NULL){
+
+ if (chan->common.sk == NULL || chan->common.func == NULL){
+ ++card->wandev.stats.rx_dropped;
+ wan_dev_kfree_skb(skb, FREE_READ);
+ chdlc_bh_cleanup(dev);
+ continue;
+ }
+
+ if (chan->common.func(skb,dev,chan->common.sk) != 0){
+ /* Sock full cannot send, queue us for another
+ * try */
+ atomic_set(&chan->common.receive_block,1);
+ return;
+ }else{
+ chdlc_bh_cleanup(dev);
+ }
+ }else{
+ chdlc_bh_cleanup(dev);
+ }
+ }
+ clear_bit(0, &chan->tq_working);
+
+ return;
+}
+
+static int chdlc_bh_cleanup (netdevice_t *dev)
+{
+ chdlc_private_area_t* chan = dev->priv;
+
+ ((bh_data_t *)&chan->bh_head[chan->bh_read])->skb = NULL;
+
+ if (chan->bh_read == MAX_BH_BUFF){
+ chan->bh_read=0;
+ }else{
+ ++chan->bh_read;
+ }
+
+ atomic_dec(&chan->bh_buff_used);
+ return 0;
+}
+
+
+
+static int bh_enqueue (netdevice_t *dev, struct sk_buff *skb)
+{
+ /* Check for full */
+ chdlc_private_area_t* chan = dev->priv;
+ sdla_t *card = chan->card;
+
+ if (atomic_read(&chan->bh_buff_used) == (MAX_BH_BUFF+1)){
+ ++card->wandev.stats.rx_dropped;
+ wan_dev_kfree_skb(skb, FREE_READ);
+ return 1;
+ }
+
+ ((bh_data_t *)&chan->bh_head[chan->bh_write])->skb = skb;
+
+ if (chan->bh_write == MAX_BH_BUFF){
+ chan->bh_write=0;
+ }else{
+ ++chan->bh_write;
+ }
+
+ atomic_inc(&chan->bh_buff_used);
+
+ return 0;
+}
+
+/* END OF API BH Support */
+
+#endif
+
/****** Interrupt Handlers **************************************************/
/*============================================================================
* Cisco HDLC interrupt service routine.
*/
-STATIC void wpc_isr (sdla_t* card)
+static void wpc_isr (sdla_t* card)
{
- struct net_device* dev;
- chdlc_private_area_t* chdlc_priv_area;
+ netdevice_t* dev;
SHARED_MEMORY_INFO_STRUCT* flags = NULL;
- int i, interrupt_serviced = 0;
+ int i;
sdla_t *my_card;
@@ -1462,95 +1971,97 @@
flags = card->u.c.flags;
if (!flags->interrupt_info_struct.interrupt_type){
/* Check for a second port (piggybacking) */
- if((my_card = card->next)){
+ 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;
}
}
}
+ flags = card->u.c.flags;
+ card->in_isr = 1;
dev = card->wandev.dev;
- card->in_isr = 1;
+ /* If we get an interrupt with no network device, stop the interrupts
+ * and issue an error */
+ if (!card->tty_opt && !dev &&
+ 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(1, (void*)&card->wandev.critical)) {
- if(card->u.c.flags != NULL) {
- flags = card->u.c.flags;
- if(flags->interrupt_info_struct.
- interrupt_type) {
- flags->interrupt_info_struct.
- interrupt_type = 0;
- }
- }
- card->in_isr = 0;
- return;
+ if(test_bit(PERI_CRIT, (void*)&card->wandev.critical)) {
+ printk(KERN_INFO "ISR CRIT TO PERI\n");
+ goto isr_done;
}
-
/* On a 508 Card, if critical due to if_send
- * Major Error !!!
- */
+ * Major Error !!! */
if(card->hw.type != SDLA_S514) {
- if(test_and_set_bit(0, (void*)&card->wandev.critical)) {
+ if(test_bit(SEND_CRIT, (void*)&card->wandev.critical)) {
printk(KERN_INFO "%s: Critical while in ISR: %lx\n",
card->devname, card->wandev.critical);
card->in_isr = 0;
+ flags->interrupt_info_struct.interrupt_type = 0;
return;
}
}
- /* FIXME: Take this check out later in the future */
- if(card->u.c.flags != NULL) {
-
- flags = card->u.c.flags;
+ switch(flags->interrupt_info_struct.interrupt_type) {
- switch(flags->interrupt_info_struct.interrupt_type) {
+ case RX_APP_INT_PEND: /* 0x01: receive interrupt */
+ rx_intr(card);
+ break;
- case RX_APP_INT_PEND: /* 0x01: receive interrupt */
- interrupt_serviced = 1;
- rx_intr(card);
- break;
+ case TX_APP_INT_PEND: /* 0x02: transmit interrupt */
+ flags->interrupt_info_struct.interrupt_permission &=
+ ~APP_INT_ON_TX_FRAME;
- case TX_APP_INT_PEND: /* 0x02: transmit interrupt */
- interrupt_serviced = 1;
- flags->interrupt_info_struct.interrupt_permission &=
- ~APP_INT_ON_TX_FRAME;
+#if defined(LINUX_2_1) || defined(LINUX_2_4)
- chdlc_priv_area = dev->priv;
- netif_wake_queue(dev);
+ if (card->tty_opt){
+ wanpipe_tty_trigger_poll(card);
break;
+ }
- case COMMAND_COMPLETE_APP_INT_PEND:/* 0x04: cmd cplt */
- interrupt_serviced = 1;
- ++ Intr_test_counter;
- break;
+ if (dev && is_queue_stopped(dev)){
+ if (card->u.c.usedby == API){
+ start_net_queue(dev);
+ wakeup_sk_bh(dev);
+ }else{
+ wake_net_dev(dev);
+ }
+ }
+#else
+ wake_net_dev(dev);
+#endif
+ break;
- case CHDLC_EXCEP_COND_APP_INT_PEND: /* 0x20 */
- interrupt_serviced = 1;
- process_chdlc_exception(card);
- break;
+ case COMMAND_COMPLETE_APP_INT_PEND:/* 0x04: cmd cplt */
+ ++ Intr_test_counter;
+ break;
- case GLOBAL_EXCEP_COND_APP_INT_PEND:
- interrupt_serviced = 1;
- process_global_exception(card);
- break;
+ case CHDLC_EXCEP_COND_APP_INT_PEND: /* 0x20 */
+ process_chdlc_exception(card);
+ break;
- case TIMER_APP_INT_PEND:
- interrupt_serviced = 1;
- timer_intr(card);
- break;
+ case GLOBAL_EXCEP_COND_APP_INT_PEND:
+ process_global_exception(card);
+ break;
- default:
- break;
- }
- }
+ case TIMER_APP_INT_PEND:
+ timer_intr(card);
+ break;
- if(!interrupt_serviced) {
+ default:
printk(KERN_INFO "%s: spurious interrupt 0x%02X!\n",
card->devname,
flags->interrupt_info_struct.interrupt_type);
@@ -1563,14 +2074,14 @@
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;
- if(card->hw.type != SDLA_S514){
- clear_bit(0, (void*)&card->wandev.critical);
- }
-
+ return;
}
/*============================================================================
@@ -1578,15 +2089,16 @@
*/
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;
- void *buf;
- int i,udp_type;
-
+ 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",
@@ -1600,90 +2112,132 @@
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;
}
+ len = rxbuf->frame_length;
+
+#if defined(LINUX_2_4) || defined(LINUX_2_1)
+ if (card->tty_opt){
+
+ if (rxbuf->error_flag){
+ goto rx_exit;
+ }
+
+ if (len <= CRC_LENGTH){
+ goto rx_exit;
+ }
+
+ if (!card->u.c.async_mode){
+ len -= CRC_LENGTH;
+ }
+
+ wanpipe_tty_receive(card,addr,len);
+ goto rx_exit;
+ }
+#endif
+
dev = card->wandev.dev;
- chdlc_priv_area = dev->priv;
- if(dev && netif_running(dev)) {
+ if (!dev){
+ goto rx_exit;
+ }
+
+ if (!is_dev_running(dev))
+ goto rx_exit;
- len = rxbuf->frame_length;
+ chdlc_priv_area = dev->priv;
- /* Allocate socket buffer */
- skb = dev_alloc_skb(len);
+
+ /* Allocate socket buffer */
+ skb = dev_alloc_skb(len);
- if (skb != NULL) {
- /* Copy data to the socket buffer */
- unsigned addr = rxbuf->ptr_data_bfr;
-
- 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;
- }
+ if (skb == NULL) {
+ 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);
+ buf = skb_put(skb, len);
+ sdla_peek(&card->hw, addr, buf, len);
- /* Decapsulate packet */
- skb->protocol = htons(ETH_P_IP);
+ skb->protocol = htons(ETH_P_IP);
- card->wandev.stats.rx_packets ++;
-#ifdef LINUX_2_1
- card->wandev.stats.rx_bytes += skb->len;
+ 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 );
+ 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.
+ 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 {
-
- if(card->u.c.usedby == API) {
- api_rx_hdr_t* api_rx_hdr;
- skb_push(skb, sizeof(api_rx_hdr_t));
- api_rx_hdr =
- (api_rx_hdr_t*)&skb->data[0x00];
- api_rx_hdr->error_flag =
- rxbuf->error_flag;
- api_rx_hdr->time_stamp =
- rxbuf->time_stamp;
- skb->protocol = htons(0x16);
- skb->pkt_type = PACKET_HOST;
- }
-
-/* FIXME: we should check to see if the received packet is a multicast packet so that we can increment the multicast statistic
- ++ chdlc_priv_area->if_stats.multicast;
-*/
- /* Pass it up the protocol stack */
- skb->dev = dev;
- skb->mac.raw = skb->data;
- netif_rx(skb);
- }
-
- } else {
- printk(KERN_INFO
- "%s: no socket buffers available!\n",
- card->devname);
- ++card->wandev.stats.rx_dropped;
}
- }
+#if defined(LINUX_2_1) || defined(LINUX_2_4)
+ } else if(card->u.c.usedby == API) {
- /* 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;
+ api_rx_hdr_t* api_rx_hdr;
+ skb_push(skb, sizeof(api_rx_hdr_t));
+ api_rx_hdr = (api_rx_hdr_t*)&skb->data[0x00];
+ api_rx_hdr->error_flag = rxbuf->error_flag;
+ api_rx_hdr->time_stamp = rxbuf->time_stamp;
+
+ skb->protocol = htons(PVC_PROT);
+ skb->mac.raw = skb->data;
+ skb->dev = dev;
+ skb->pkt_type = WAN_PACKET_DATA;
+
+ bh_enqueue(dev, skb);
+
+ if (!test_and_set_bit(0,&chdlc_priv_area->tq_working)){
+ wanpipe_queue_tq(&chdlc_priv_area->common.wanpipe_task);
+ wanpipe_mark_bh();
+ }
+#endif
+ }else{
+ /* FIXME: we should check to see if the received packet is a
+ multicast packet so that we can increment the multicast
+ statistic
+ ++ chdlc_priv_area->if_stats.multicast;
+ */
+ /* 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;
+ }
}
/*============================================================================
@@ -1694,13 +2248,25 @@
*/
void timer_intr(sdla_t *card)
{
- struct net_device* dev;
+ netdevice_t* dev;
chdlc_private_area_t* chdlc_priv_area = NULL;
SHARED_MEMORY_INFO_STRUCT* flags = NULL;
- dev = card->wandev.dev;
+ if ((dev = card->wandev.dev)==NULL){
+ flags = card->u.c.flags;
+ flags->interrupt_info_struct.interrupt_permission &=
+ ~APP_INT_ON_TIMER;
+ return;
+ }
+
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,
@@ -1733,16 +2299,14 @@
static int set_chdlc_config(sdla_t* card)
{
-
- struct net_device * dev = card->wandev.dev;
- chdlc_private_area_t *chdlc_priv_area = dev->priv;
CHDLC_CONFIGURATION_STRUCT cfg;
memset(&cfg, 0, sizeof(CHDLC_CONFIGURATION_STRUCT));
- if(card->wandev.clocking)
+ 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;
@@ -1750,9 +2314,18 @@
cfg.modem_status_timer = 100;
cfg.CHDLC_protocol_options = card->u.c.protocol_options;
- cfg.percent_data_buffer_for_Tx = 50;
+
+ if (card->tty_opt){
+ cfg.CHDLC_API_options = DISCARD_RX_ERROR_FRAMES;
+ }
+
+ cfg.percent_data_buffer_for_Tx = (card->u.c.receive_only) ? 0 : 50;
cfg.CHDLC_statistics_options = (CHDLC_TX_DATA_BYTE_COUNT_STAT |
CHDLC_RX_DATA_BYTE_COUNT_STAT);
+
+ if (card->tty_opt){
+ card->wandev.mtu = TTY_CHDLC_MAX_MTU;
+ }
cfg.max_CHDLC_data_field_length = card->wandev.mtu;
cfg.transmit_keepalive_timer = card->u.c.kpalv_tx;
cfg.receive_keepalive_timer = card->u.c.kpalv_rx;
@@ -1762,9 +2335,12 @@
if (cfg.SLARP_request_timer) {
cfg.IP_address = 0;
cfg.IP_netmask = 0;
- }
- else {
-#ifdef LINUX_2_1
+
+ }else if (card->wandev.dev){
+ netdevice_t * dev = card->wandev.dev;
+ chdlc_private_area_t *chdlc_priv_area = dev->priv;
+
+#if defined(LINUX_2_1) || defined(LINUX_2_4)
struct in_device *in_dev = dev->ip_ptr;
if(in_dev != NULL) {
@@ -1773,10 +2349,8 @@
if (ifa != NULL ) {
cfg.IP_address = ntohl(ifa->ifa_local);
cfg.IP_netmask = ntohl(ifa->ifa_mask);
- chdlc_priv_area->IP_address =
- ntohl(ifa->ifa_local);
- chdlc_priv_area->IP_netmask =
- ntohl(ifa->ifa_mask);
+ chdlc_priv_area->IP_address = ntohl(ifa->ifa_local);
+ chdlc_priv_area->IP_netmask = ntohl(ifa->ifa_mask);
}
}
#else
@@ -1803,6 +2377,70 @@
}
+/*-----------------------------------------------------------------------------
+ set_asy_config() used to set asynchronous configuration options on the board
+------------------------------------------------------------------------------*/
+
+static int set_asy_config(sdla_t* card)
+{
+
+ ASY_CONFIGURATION_STRUCT cfg;
+ CHDLC_MAILBOX_STRUCT *mailbox = card->mbox;
+ int err;
+
+ memset(&cfg, 0, sizeof(ASY_CONFIGURATION_STRUCT));
+
+ if(card->wandev.clocking)
+ cfg.baud_rate = card->wandev.bps;
+
+ cfg.line_config_options = (card->wandev.interface == WANOPT_RS232) ?
+ INTERFACE_LEVEL_RS232 : INTERFACE_LEVEL_V35;
+
+ cfg.modem_config_options = 0;
+ cfg.asy_API_options = card->u.c.api_options;
+ cfg.asy_protocol_options = card->u.c.protocol_options;
+ cfg.Tx_bits_per_char = card->u.c.tx_bits_per_char;
+ cfg.Rx_bits_per_char = card->u.c.rx_bits_per_char;
+ cfg.stop_bits = card->u.c.stop_bits;
+ cfg.parity = card->u.c.parity;
+ cfg.break_timer = card->u.c.break_timer;
+ cfg.asy_Rx_inter_char_timer = card->u.c.inter_char_timer;
+ cfg.asy_Rx_complete_length = card->u.c.rx_complete_length;
+ cfg.XON_char = card->u.c.xon_char;
+ cfg.XOFF_char = card->u.c.xoff_char;
+ cfg.asy_statistics_options = (CHDLC_TX_DATA_BYTE_COUNT_STAT |
+ CHDLC_RX_DATA_BYTE_COUNT_STAT);
+
+ mailbox->buffer_length = sizeof(ASY_CONFIGURATION_STRUCT);
+ memcpy(mailbox->data, &cfg, mailbox->buffer_length);
+ mailbox->command = SET_ASY_CONFIGURATION;
+ err = sdla_exec(mailbox) ? mailbox->return_code : CMD_TIMEOUT;
+ if (err != COMMAND_OK)
+ chdlc_error (card, err, mailbox);
+ return err;
+}
+
+/*============================================================================
+ * Enable asynchronous communications.
+ */
+
+static int asy_comm_enable (sdla_t* card)
+{
+
+ int err;
+ CHDLC_MAILBOX_STRUCT* mb = card->mbox;
+
+ mb->buffer_length = 0;
+ mb->command = ENABLE_ASY_COMMUNICATIONS;
+ err = sdla_exec(mb) ? mb->return_code : CMD_TIMEOUT;
+ if (err != COMMAND_OK && card->wandev.dev)
+ chdlc_error(card, err, mb);
+
+ if (!err)
+ card->u.c.comm_enabled = 1;
+
+ return err;
+}
/*============================================================================
* Process global exception condition
@@ -1830,7 +2468,8 @@
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;
+ 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;
@@ -1850,6 +2489,19 @@
card->devname);
break;
+ case 0x17:
+ if (card->tty_opt){
+ if (card->tty && card->tty_open){
+ printk(KERN_INFO
+ "%s: Modem Hangup Exception: Hanging Up!\n",
+ card->devname);
+ tty_hangup(card->tty);
+ }
+ break;
+ }
+
+ /* If TTY is not used just drop throught */
+
default:
printk(KERN_INFO "%s: Global exception %x\n",
card->devname, mbox->return_code);
@@ -1877,11 +2529,13 @@
case EXCEP_LINK_ACTIVE:
port_set_state(card, WAN_CONNECTED);
+ trigger_chdlc_poll(card->wandev.dev);
break;
case EXCEP_LINK_INACTIVE_MODEM:
port_set_state(card, WAN_DISCONNECTED);
unconfigure_ip(card);
+ trigger_chdlc_poll(card->wandev.dev);
break;
case EXCEP_LINK_INACTIVE_KPALV:
@@ -1889,6 +2543,7 @@
printk(KERN_INFO "%s: Keepalive timer expired.\n",
card->devname);
unconfigure_ip(card);
+ trigger_chdlc_poll(card->wandev.dev);
break;
case EXCEP_IP_ADDRESS_DISCOVERED:
@@ -1919,10 +2574,16 @@
static int configure_ip (sdla_t* card)
{
- struct net_device *dev = card->wandev.dev;
- chdlc_private_area_t *chdlc_priv_area = dev->priv;
+ netdevice_t *dev = card->wandev.dev;
+ chdlc_private_area_t *chdlc_priv_area;
char err;
+ if (!dev)
+ return 0;
+
+ chdlc_priv_area = dev->priv;
+
+
/* set to discover */
if(card->u.c.slarp_timer != 0x00) {
CHDLC_MAILBOX_STRUCT* mb = card->mbox;
@@ -1940,14 +2601,14 @@
cfg = (CHDLC_CONFIGURATION_STRUCT *)mb->data;
chdlc_priv_area->IP_address = cfg->IP_address;
chdlc_priv_area->IP_netmask = cfg->IP_netmask;
- }
- /* Set flag to add route */
- chdlc_priv_area->route_status = ADD_ROUTE;
+ /* Set flag to add route */
+ chdlc_priv_area->route_status = ADD_ROUTE;
- /* The idea here is to add the route in the poll routine.
- This way, we aren't in interrupt context when adding routes */
- card->poll = process_route;
+ /* The idea here is to add the route in the poll routine.
+ This way, we aren't in interrupt context when adding routes */
+ trigger_chdlc_poll(dev);
+ }
return 0;
}
@@ -1960,17 +2621,23 @@
static int unconfigure_ip (sdla_t* card)
{
- struct net_device *dev = card->wandev.dev;
- chdlc_private_area_t *chdlc_priv_area= dev->priv;
+ netdevice_t *dev = card->wandev.dev;
+ chdlc_private_area_t *chdlc_priv_area;
+
+ if (!dev)
+ return 0;
+ chdlc_priv_area= dev->priv;
+
if (chdlc_priv_area->route_status == ROUTE_ADDED) {
- chdlc_priv_area->route_status = REMOVE_ROUTE;
- /* The idea here is to delete the route in
- * the poll routine.
- * This way, we aren't in interrupt context
- * when adding routes
+
+ /* Note: If this function is called, the
+ * port state has been DISCONNECTED. This state
+ * change will trigger a poll_disconnected
+ * function, that will check for this condition.
*/
- card->poll = process_route;
+ chdlc_priv_area->route_status = REMOVE_ROUTE;
+
}
return 0;
}
@@ -1982,14 +2649,14 @@
static void process_route (sdla_t *card)
{
- struct net_device *dev = card->wandev.dev;
+ netdevice_t *dev = card->wandev.dev;
unsigned char port_num;
chdlc_private_area_t *chdlc_priv_area = NULL;
u32 local_IP_addr = 0;
u32 remote_IP_addr = 0;
u32 IP_netmask, IP_addr;
int err = 0;
-#ifdef LINUX_2_1
+#if defined(LINUX_2_1) || defined(LINUX_2_4)
struct in_device *in_dev;
mm_segment_t fs;
struct ifreq if_info;
@@ -2002,16 +2669,25 @@
chdlc_priv_area = dev->priv;
port_num = card->u.c.comm_port;
+ /* Bug Fix Mar 16 2000
+ * AND the IP address to the Mask before checking
+ * the last two bits. */
+
if((chdlc_priv_area->route_status == ADD_ROUTE) &&
- ((chdlc_priv_area->IP_address & 0x000000FF) > 2)) {
+ ((chdlc_priv_area->IP_address & ~chdlc_priv_area->IP_netmask) > 2)) {
+
printk(KERN_INFO "%s: Dynamic route failure.\n",card->devname);
+
if(card->u.c.slarp_timer) {
+
printk(KERN_INFO "%s: Bad IP address %s received\n",
card->devname,
in_ntoa(ntohl(chdlc_priv_area->IP_address)));
printk(KERN_INFO "%s: from remote station.\n",
card->devname);
+
}else{
+
printk(KERN_INFO "%s: Bad IP address %s issued\n",
card->devname,
in_ntoa(ntohl(chdlc_priv_area->IP_address)));
@@ -2033,11 +2709,10 @@
/* do not remove a bad route that has already been removed */
if(chdlc_priv_area->route_removed) {
- card->poll = NULL;
return;
}
-#ifdef LINUX_2_1
+#if defined(LINUX_2_1) || defined(LINUX_2_4)
in_dev = dev->ip_ptr;
if(in_dev != NULL) {
@@ -2058,7 +2733,17 @@
*/
IP_netmask = ntohl(chdlc_priv_area->IP_netmask);
remote_IP_addr = ntohl(chdlc_priv_area->IP_address);
- local_IP_addr = (remote_IP_addr & ntohl(0xFFFFFF00)) +
+
+
+ /* If Netmask is 255.255.255.255 the local address
+ * calculation will fail. Default it back to 255.255.255.0 */
+ if (IP_netmask == 0xffffffff)
+ IP_netmask &= 0x00ffffff;
+
+ /* Bug Fix Mar 16 2000
+ * AND the Remote IP address with IP netmask, instead
+ * of static netmask of 255.255.255.0 */
+ local_IP_addr = (remote_IP_addr & IP_netmask) +
(~remote_IP_addr & ntohl(0x0003));
if(!card->u.c.slarp_timer) {
@@ -2071,7 +2756,7 @@
fs = get_fs(); /* Save file system */
set_fs(get_ds()); /* Get user space block */
-#ifdef LINUX_2_1
+#if defined(LINUX_2_1) || defined(LINUX_2_4)
/* Setup a structure for adding/removing routes */
memset(&if_info, 0, sizeof(if_info));
strcpy(if_info.ifr_name, dev->name);
@@ -2099,7 +2784,7 @@
case ADD_ROUTE:
if(!card->u.c.slarp_timer) {
-#ifdef LINUX_2_1
+#if defined(LINUX_2_1) || defined(LINUX_2_4)
if_data2 = (struct sockaddr_in *)&if_info.ifr_dstaddr;
if_data2->sin_addr.s_addr = remote_IP_addr;
if_data2->sin_family = AF_INET;
@@ -2108,7 +2793,7 @@
err = ip_rt_new(&route);
#endif
} else {
-#ifdef LINUX_2_1
+#if defined(LINUX_2_1) || defined(LINUX_2_4)
if_data1 = (struct sockaddr_in *)&if_info.ifr_addr;
if_data1->sin_addr.s_addr = local_IP_addr;
if_data1->sin_family = AF_INET;
@@ -2141,7 +2826,7 @@
case REMOVE_ROUTE:
-#ifdef LINUX_2_1
+#if defined(LINUX_2_1) || defined(LINUX_2_4)
/* Change the local ip address of the interface to 0.
* This will also delete the destination route.
*/
@@ -2179,9 +2864,6 @@
set_fs(fs); /* Restore file system */
- /* Once we've processed the route, stop polling */
- card->poll = NULL;
-
}
@@ -2190,7 +2872,7 @@
*/
static int store_udp_mgmt_pkt(char udp_pkt_src, sdla_t* card,
- struct sk_buff *skb, struct net_device* dev,
+ struct sk_buff *skb, netdevice_t* dev,
chdlc_private_area_t* chdlc_priv_area )
{
int udp_pkt_stored = 0;
@@ -2204,15 +2886,12 @@
udp_pkt_stored = 1;
}
-#ifdef LINUX_2_1
- dev_kfree_skb(skb);
-#else
- if(udp_pkt_src == UDP_PKT_FRM_STACK)
- dev_kfree_skb(skb, FREE_WRITE);
- else
- dev_kfree_skb(skb, FREE_READ);
-#endif
-
+ 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);
}
@@ -2221,7 +2900,7 @@
* Process UDP management packet.
*/
-static int process_udp_mgmt_pkt(sdla_t* card, struct net_device* dev,
+static int process_udp_mgmt_pkt(sdla_t* card, netdevice_t* dev,
chdlc_private_area_t* chdlc_priv_area )
{
unsigned char *buf;
@@ -2240,22 +2919,30 @@
chdlc_udp_pkt = (chdlc_udp_pkt_t *) chdlc_priv_area->udp_pkt_data;
- switch(chdlc_udp_pkt->cblock.command) {
+ if(chdlc_priv_area->udp_pkt_src == UDP_PKT_FRM_NETWORK){
- case FT1_MONITOR_STATUS_CTRL:
- case CPIPE_ENABLE_TRACING:
- case CPIPE_DISABLE_TRACING:
- case CPIPE_GET_TRACE_INFO:
- case SET_FT1_MODE:
- if(chdlc_priv_area->udp_pkt_src ==
- UDP_PKT_FRM_NETWORK) {
- udp_mgmt_req_valid = 0;
- }
- break;
-
- default:
- break;
- }
+ /* Only these commands are support for remote debugging.
+ * All others are not */
+ 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) {
@@ -2265,6 +2952,12 @@
/* 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;
@@ -2488,11 +3181,12 @@
((unsigned char *)chdlc_udp_pkt->data )[1] =
flags->FT1_info_struct.parallel_port_B_input;
-
+
chdlc_udp_pkt->cblock.return_code = COMMAND_OK;
+ chdlc_udp_pkt->cblock.buffer_length = 2;
mb->buffer_length = 2;
break;
-
+
case CPIPE_ROUTER_UP_TIME:
do_gettimeofday( &tv );
chdlc_priv_area->router_up_time = tv.tv_sec -
@@ -2500,6 +3194,8 @@
*(unsigned long *)&chdlc_udp_pkt->data =
chdlc_priv_area->router_up_time;
mb->buffer_length = sizeof(unsigned long);
+ chdlc_udp_pkt->cblock.buffer_length = sizeof(unsigned long);
+ chdlc_udp_pkt->cblock.return_code = COMMAND_OK;
break;
case FT1_MONITOR_STATUS_CTRL:
@@ -2525,8 +3221,10 @@
break;
}
}
-
+ goto dflt_1;
+
default:
+dflt_1:
/* it's a board command */
mb->command = chdlc_udp_pkt->cblock.command;
mb->buffer_length = chdlc_udp_pkt->cblock.buffer_length;
@@ -2556,12 +3254,19 @@
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;
-#ifdef LINUX_2_1
- card->wandev.stats.tx_bytes += len;
+
+ if(chdlc_priv_area->udp_pkt_src == UDP_PKT_FRM_NETWORK){
+
+ /* Must check if we interrupted if_send() routine. The
+ * tx buffers might be used. If so drop the packet */
+ if (!test_bit(SEND_CRIT,&card->wandev.critical)) {
+
+ 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 {
@@ -2595,7 +3300,7 @@
* Initialize Receive and Transmit Buffers.
*/
-static void init_chdlc_tx_rx_buff( sdla_t* card, struct net_device *dev )
+static void init_chdlc_tx_rx_buff( sdla_t* card)
{
CHDLC_MAILBOX_STRUCT* mb = card->mbox;
CHDLC_TX_STATUS_EL_CFG_STRUCT *tx_config;
@@ -2607,7 +3312,9 @@
err = sdla_exec(mb) ? mb->return_code : CMD_TIMEOUT;
if(err != COMMAND_OK) {
- chdlc_error(card,err,mb);
+ if (card->wandev.dev){
+ chdlc_error(card,err,mb);
+ }
return;
}
@@ -2678,19 +3385,13 @@
* Perform Interrupt Test by running READ_CHDLC_CODE_VERSION command MAX_INTR
* _TEST_COUNTER times.
*/
-static int intr_test( sdla_t* card, struct net_device *dev )
+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.
- */
-
- clear_bit(1, (void*)&card->wandev.critical);
+
err = chdlc_set_intr_mode(card, APP_INT_ON_COMMAND_COMPLETE);
if (err == CMD_OK) {
@@ -2707,8 +3408,6 @@
}
err = chdlc_set_intr_mode(card, 0);
- set_bit(1, (void*)&card->wandev.critical);
-
if (err != CMD_OK)
return err;
@@ -2723,13 +3422,33 @@
{
chdlc_udp_pkt_t *chdlc_udp_pkt = (chdlc_udp_pkt_t *)skb->data;
+#ifdef _WAN_UDP_DEBUG
+ printk(KERN_INFO "SIG %s = %s\n\
+ UPP %x = %x\n\
+ PRT %x = %x\n\
+ REQ %i = %i\n\
+ 36 th = %x 37th = %x\n",
+ chdlc_udp_pkt->wp_mgmt.signature,
+ UDPMGMT_SIGNATURE,
+ 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,
+ skb->data[36], skb->data[37]);
+#endif
+
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;
}
- else return UDP_INVALID_TYPE;
}
/*============================================================================
@@ -2744,7 +3463,7 @@
case WAN_CONNECTED:
printk (KERN_INFO "%s: Link connected!\n",
card->devname);
- break;
+ break;
case WAN_CONNECTING:
printk (KERN_INFO "%s: Link connecting...\n",
@@ -2758,31 +3477,1268 @@
}
card->wandev.state = card->u.c.state = state;
+ if (card->wandev.dev){
+ netdevice_t *dev = card->wandev.dev;
+ chdlc_private_area_t *chdlc_priv_area = dev->priv;
+ chdlc_priv_area->common.state = state;
+ }
}
}
-void s508_lock (sdla_t *card, unsigned long *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)
{
-#ifdef CONFIG_SMP
- spin_lock_irqsave(&card->lock, *smp_flags);
- if (card->next){
- spin_lock(&card->next->lock);
- }
-#else
- disable_irq(card->hw.irq);
-#endif
+ netdevice_t *dev = card->wandev.dev;
+ chdlc_private_area_t *chdlc_priv_area = dev->priv;
+ SHARED_MEMORY_INFO_STRUCT *flags = card->u.c.flags;
+
+ if (card->u.c.comm_enabled){
+
+ /* Jun 20. 2000: NC
+ * IP addresses are not used in the API mode */
+
+ if ((chdlc_priv_area->ip_local_tmp != chdlc_priv_area->ip_local ||
+ chdlc_priv_area->ip_remote_tmp != chdlc_priv_area->ip_remote) &&
+ card->u.c.usedby == WANPIPE) {
+
+ /* The IP addersses have changed, we must
+ * stop the communications and reconfigure
+ * the card. Reason: the firmware must know
+ * the local and remote IP addresses. */
+ disable_comm(card);
+ port_set_state(card, WAN_DISCONNECTED);
+ printk(KERN_INFO
+ "%s: IP addresses changed!\n",
+ card->devname);
+ printk(KERN_INFO
+ "%s: Restarting communications ...\n",
+ card->devname);
+ }else{
+ /* IP addresses are the same and the link is up,
+ * we dont have to do anything here. Therefore, exit */
+ return 0;
+ }
+ }
+
+ chdlc_priv_area->ip_local = chdlc_priv_area->ip_local_tmp;
+ chdlc_priv_area->ip_remote = chdlc_priv_area->ip_remote_tmp;
+
+
+ /* Setup the Board for asynchronous mode */
+ if (card->u.c.async_mode){
+
+ if (set_asy_config(card)) {
+ printk (KERN_INFO "%s: Failed CHDLC Async configuration!\n",
+ card->devname);
+ return 0;
+ }
+ }else{
+ /* Setup the Board for CHDLC */
+ if (set_chdlc_config(card)) {
+ printk (KERN_INFO "%s: Failed CHDLC configuration!\n",
+ card->devname);
+ return 0;
+ }
+ }
+
+ /* 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);
+
+ /* In TTY mode, receive interrupt will be enabled during
+ * wanpipe_tty_open() operation */
+ if (card->tty_opt){
+ flags->interrupt_info_struct.interrupt_permission &= ~APP_INT_ON_RX_FRAME;
+ }
+
+ /* Enable communications */
+ if (card->u.c.async_mode){
+ if (asy_comm_enable(card) != 0) {
+ printk(KERN_INFO "%s: Failed to enable async commnunication!\n",
+ card->devname);
+ flags->interrupt_info_struct.interrupt_permission = 0;
+ card->u.c.comm_enabled=0;
+ chdlc_set_intr_mode(card,0);
+ return 0;
+ }
+ }else{
+ 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 */
+ init_chdlc_tx_rx_buff(card);
+ port_set_state(card, WAN_CONNECTING);
+ return 0;
}
-void s508_unlock (sdla_t *card, unsigned long *smp_flags)
+
+/*============================================================
+ * chdlc_poll
+ *
+ * Rationale:
+ * We cannot manipulate the routing tables, or
+ * ip addresses withing the interrupt. Therefore
+ * we must perform such actons outside an interrupt
+ * at a later time.
+ *
+ * Description:
+ * CHDLC polling routine, responsible for
+ * shutting down interfaces upon disconnect
+ * and adding/removing routes.
+ *
+ * Usage:
+ * This function is executed for each CHDLC
+ * interface through a tq_schedule bottom half.
+ *
+ * trigger_chdlc_poll() function is used to kick
+ * the chldc_poll routine.
+ */
+
+static void chdlc_poll (netdevice_t *dev)
{
-#ifdef CONFIG_SMP
- if (card->next){
- spin_unlock(&card->next->lock);
- }
- spin_unlock_irqrestore(&card->lock, *smp_flags);
-#else
- enable_irq(card->hw.irq);
-#endif
-}
+ chdlc_private_area_t *chdlc_priv_area;
+ sdla_t *card;
+ u8 check_gateway=0;
+ SHARED_MEMORY_INFO_STRUCT* flags;
+
+
+ if (!dev || (chdlc_priv_area=dev->priv) == NULL)
+ return;
+
+ card = chdlc_priv_area->card;
+ flags = card->u.c.flags;
+
+ /* (Re)Configuraiton is in progress, stop what you are
+ * doing and get out */
+ if (test_bit(PERI_CRIT,&card->wandev.critical)){
+ clear_bit(POLL_CRIT,&card->wandev.critical);
+ return;
+ }
+
+ /* if_open() function has triggered the polling routine
+ * to determine the configured IP addresses. Once the
+ * addresses are found, trigger the chdlc configuration */
+ if (test_bit(0,&chdlc_priv_area->config_chdlc)){
+
+ chdlc_priv_area->ip_local_tmp = get_ip_address(dev,WAN_LOCAL_IP);
+ chdlc_priv_area->ip_remote_tmp = get_ip_address(dev,WAN_POINTOPOINT_IP);
+
+ /* Jun 20. 2000 Bug Fix
+ * Only perform this check in WANPIPE mode, since
+ * IP addresses are not used in the API mode. */
+
+ if (chdlc_priv_area->ip_local_tmp == chdlc_priv_area->ip_remote_tmp &&
+ card->u.c.slarp_timer == 0x00 &&
+ !card->u.c.backup &&
+ card->u.c.usedby == WANPIPE){
+
+ if (++chdlc_priv_area->ip_error > MAX_IP_ERRORS){
+ printk(KERN_INFO "\n%s: --- WARNING ---\n",
+ card->devname);
+ printk(KERN_INFO
+ "%s: The local IP address is the same as the\n",
+ card->devname);
+ printk(KERN_INFO
+ "%s: Point-to-Point IP address.\n",
+ card->devname);
+ printk(KERN_INFO "%s: --- WARNING ---\n\n",
+ card->devname);
+ }else{
+ clear_bit(POLL_CRIT,&card->wandev.critical);
+ chdlc_priv_area->poll_delay_timer.expires = jiffies+HZ;
+ add_timer(&chdlc_priv_area->poll_delay_timer);
+ return;
+ }
+ }
+
+ clear_bit(0,&chdlc_priv_area->config_chdlc);
+ clear_bit(POLL_CRIT,&card->wandev.critical);
+
+ chdlc_priv_area->timer_int_enabled |= TMR_INT_ENABLED_CONFIG;
+ flags->interrupt_info_struct.interrupt_permission |= APP_INT_ON_TIMER;
+ return;
+ }
+ /* Dynamic interface implementation, as well as dynamic
+ * routing. */
+
+ switch (card->u.c.state){
+
+ case WAN_DISCONNECTED:
+
+ /* If the dynamic interface configuration is on, and interface
+ * is up, then bring down the netowrk interface */
+
+ if (test_bit(DYN_OPT_ON,&chdlc_priv_area->interface_down) &&
+ !test_bit(DEV_DOWN, &chdlc_priv_area->interface_down) &&
+ card->wandev.dev->flags & IFF_UP){
+
+ printk(KERN_INFO "%s: Interface %s down.\n",
+ card->devname,card->wandev.dev->name);
+ change_dev_flags(card->wandev.dev,(card->wandev.dev->flags&~IFF_UP));
+ set_bit(DEV_DOWN,&chdlc_priv_area->interface_down);
+ chdlc_priv_area->route_status = NO_ROUTE;
+
+ }else{
+ /* We need to check if the local IP address is
+ * zero. If it is, we shouldn't try to remove it.
+ */
+
+ if (card->wandev.dev->flags & IFF_UP &&
+ get_ip_address(card->wandev.dev,WAN_LOCAL_IP) &&
+ chdlc_priv_area->route_status != NO_ROUTE &&
+ card->u.c.slarp_timer){
+
+ process_route(card);
+ }
+ }
+ break;
+
+ case WAN_CONNECTED:
+
+ /* In SMP machine this code can execute before the interface
+ * comes up. In this case, we must make sure that we do not
+ * try to bring up the interface before dev_open() is finished */
+
+
+ /* DEV_DOWN will be set only when we bring down the interface
+ * for the very first time. This way we know that it was us
+ * that brought the interface down */
+
+ if (test_bit(DYN_OPT_ON,&chdlc_priv_area->interface_down) &&
+ test_bit(DEV_DOWN, &chdlc_priv_area->interface_down) &&
+ !(card->wandev.dev->flags & IFF_UP)){
+
+ printk(KERN_INFO "%s: Interface %s up.\n",
+ card->devname,card->wandev.dev->name);
+ change_dev_flags(card->wandev.dev,(card->wandev.dev->flags|IFF_UP));
+ clear_bit(DEV_DOWN,&chdlc_priv_area->interface_down);
+ check_gateway=1;
+ }
+
+ if (chdlc_priv_area->route_status == ADD_ROUTE &&
+ card->u.c.slarp_timer){
+
+ process_route(card);
+ check_gateway=1;
+ }
+
+ if (chdlc_priv_area->gateway && check_gateway)
+ add_gateway(card,dev);
+
+ break;
+ }
+
+ clear_bit(POLL_CRIT,&card->wandev.critical);
+}
+
+/*============================================================
+ * trigger_chdlc_poll
+ *
+ * Description:
+ * Add a chdlc_poll() task into a tq_scheduler bh handler
+ * for a specific dlci/interface. This will kick
+ * the fr_poll() routine at a later time.
+ *
+ * Usage:
+ * Interrupts use this to defer a taks to
+ * a polling routine.
+ *
+ */
+static void trigger_chdlc_poll (netdevice_t *dev)
+{
+ chdlc_private_area_t *chdlc_priv_area;
+ sdla_t *card;
+
+ if (!dev)
+ return;
+
+ if ((chdlc_priv_area = dev->priv)==NULL)
+ return;
+
+ card = chdlc_priv_area->card;
+
+ if (test_and_set_bit(POLL_CRIT,&card->wandev.critical)){
+ return;
+ }
+ if (test_bit(PERI_CRIT,&card->wandev.critical)){
+ return;
+ }
+#ifdef LINUX_2_4
+ schedule_task(&chdlc_priv_area->poll_task);
+#else
+ queue_task(&chdlc_priv_area->poll_task, &tq_scheduler);
+#endif
+ return;
+}
+
+
+static void chdlc_poll_delay (unsigned long dev_ptr)
+{
+ netdevice_t *dev = (netdevice_t *)dev_ptr;
+ trigger_chdlc_poll(dev);
+}
+
+
+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){
+ 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
+}
+
+//*********** TTY SECTION ****************
+#if defined(LINUX_2_4) || defined(LINUX_2_1)
+
+static void wanpipe_tty_trigger_tx_irq(sdla_t *card)
+{
+ SHARED_MEMORY_INFO_STRUCT *flags = card->u.c.flags;
+ INTERRUPT_INFORMATION_STRUCT *chdlc_int = &flags->interrupt_info_struct;
+ chdlc_int->interrupt_permission |= APP_INT_ON_TX_FRAME;
+}
+
+static void wanpipe_tty_trigger_poll(sdla_t *card)
+{
+#ifdef LINUX_2_4
+ schedule_task(&card->tty_task_queue);
+#else
+ queue_task(&card->tty_task_queue, &tq_scheduler);
+#endif
+}
+
+static void tty_poll_task (void* data)
+{
+ sdla_t *card = (sdla_t*)data;
+ struct tty_struct *tty;
+
+ if ((tty=card->tty)==NULL)
+ return;
+
+ if ((tty->flags & (1 << TTY_DO_WRITE_WAKEUP)) &&
+ tty->ldisc.write_wakeup){
+ (tty->ldisc.write_wakeup)(tty);
+ }
+ wake_up_interruptible(&tty->write_wait);
+#if defined(SERIAL_HAVE_POLL_WAIT) || \
+ (defined LINUX_2_1 && LINUX_VERSION_CODE >= KERNEL_VERSION(2,2,15))
+ wake_up_interruptible(&tty->poll_wait);
+#endif
+ return;
+}
+
+static void wanpipe_tty_close(struct tty_struct *tty, struct file * filp)
+{
+ sdla_t *card;
+ unsigned long smp_flags;
+
+ if (!tty || !tty->driver_data){
+ return;
+ }
+
+ card = (sdla_t*)tty->driver_data;
+
+ if (!card)
+ return;
+
+ printk(KERN_INFO "%s: Closing TTY Driver!\n",
+ card->devname);
+
+ /* Sanity Check */
+ if (!card->tty_open)
+ return;
+
+ wanpipe_close(card);
+ if (--card->tty_open == 0){
+
+ lock_adapter_irq(&card->wandev.lock,&smp_flags);
+ card->tty=NULL;
+ chdlc_disable_comm_shutdown(card);
+ unlock_adapter_irq(&card->wandev.lock,&smp_flags);
+
+ if (card->tty_buf){
+ kfree(card->tty_buf);
+ card->tty_buf=NULL;
+ }
+
+ if (card->tty_rx){
+ kfree(card->tty_rx);
+ card->tty_rx=NULL;
+ }
+ }
+ return;
+}
+static int wanpipe_tty_open(struct tty_struct *tty, struct file * filp)
+{
+ unsigned long smp_flags;
+ sdla_t *card;
+
+ if (!tty){
+ return -ENODEV;
+ }
+
+ if (!tty->driver_data){
+ int port;
+ port = MINOR(tty->device) - tty->driver.minor_start;
+ if ((port < 0) || (port >= NR_PORTS))
+ return -ENODEV;
+
+ tty->driver_data = WAN_CARD(port);
+ if (!tty->driver_data)
+ return -ENODEV;
+ }
+
+ card = (sdla_t*)tty->driver_data;
+
+ if (!card){
+ lock_adapter_irq(&card->wandev.lock,&smp_flags);
+ card->tty=NULL;
+ unlock_adapter_irq(&card->wandev.lock,&smp_flags);
+ return -ENODEV;
+ }
+
+ printk(KERN_INFO "%s: Opening TTY Driver!\n",
+ card->devname);
+
+ if (card->tty_open == 0){
+ lock_adapter_irq(&card->wandev.lock,&smp_flags);
+ card->tty=tty;
+ unlock_adapter_irq(&card->wandev.lock,&smp_flags);
+
+ if (!card->tty_buf){
+ card->tty_buf = kmalloc(TTY_CHDLC_MAX_MTU, GFP_KERNEL);
+ if (!card->tty_buf){
+ card->tty_buf=NULL;
+ card->tty=NULL;
+ return -ENOMEM;
+ }
+ }
+
+ if (!card->tty_rx){
+ card->tty_rx = kmalloc(TTY_CHDLC_MAX_MTU, GFP_KERNEL);
+ if (!card->tty_rx){
+ /* Free the buffer above */
+ kfree(card->tty_buf);
+ card->tty_buf=NULL;
+ card->tty=NULL;
+ return -ENOMEM;
+ }
+ }
+ }
+
+ ++card->tty_open;
+ wanpipe_open(card);
+ return 0;
+}
+
+static int wanpipe_tty_write(struct tty_struct * tty, int from_user,
+ const unsigned char *buf, int count)
+{
+ unsigned long smp_flags=0;
+ sdla_t *card=NULL;
+
+ if (!tty){
+ dbg_printk(KERN_INFO "NO TTY in Write\n");
+ return -ENODEV;
+ }
+
+ card = (sdla_t *)tty->driver_data;
+
+ if (!card){
+ dbg_printk(KERN_INFO "No Card in TTY Write\n");
+ return -ENODEV;
+ }
+
+ if (count > card->wandev.mtu){
+ dbg_printk(KERN_INFO "Frame too big in Write %i Max: %i\n",
+ count,card->wandev.mtu);
+ return -EINVAL;
+ }
+
+ if (card->wandev.state != WAN_CONNECTED){
+ dbg_printk(KERN_INFO "Card not connected in TTY Write\n");
+ return -EINVAL;
+ }
+
+ /* 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 TTY Write\n",
+ card->devname);
+
+ /* Lock the 508 Card: SMP is supported */
+ if(card->hw.type != SDLA_S514)
+ s508_unlock(card,&smp_flags);
+
+ return -EINVAL;
+ }
+
+ if (from_user) {
+
+ unsigned char *tmp_buf;
+
+ if ((tmp_buf=card->tty_buf)==NULL){
+ dbg_printk(KERN_INFO "No TTY BUF in Write\n");
+
+ clear_bit(SEND_CRIT,(void*)&card->wandev.critical);
+
+ if(card->hw.type != SDLA_S514)
+ s508_unlock(card,&smp_flags);
+
+ return -ENOMEM;
+ }
+
+ if (copy_from_user(tmp_buf,buf,count)){
+ dbg_printk(KERN_INFO "%s: Failed to copy from user!\n",
+ card->devname);
+
+ clear_bit(SEND_CRIT,(void*)&card->wandev.critical);
+
+ if(card->hw.type != SDLA_S514)
+ s508_unlock(card,&smp_flags);
+
+ return -EINVAL;
+ }
+
+ if (chdlc_send(card,(void*)tmp_buf,count)){
+ dbg_printk(KERN_INFO "%s: Failed to send, retry later: user!\n",
+ card->devname);
+
+ clear_bit(SEND_CRIT,(void*)&card->wandev.critical);
+
+ wanpipe_tty_trigger_tx_irq(card);
+
+ if(card->hw.type != SDLA_S514)
+ s508_unlock(card,&smp_flags);
+ return 0;
+ }
+
+ }else{
+ if (chdlc_send(card,(void*)buf,count)){
+ dbg_printk(KERN_INFO "%s: Failed to send, retry later: kernel!\n",
+ card->devname);
+ clear_bit(SEND_CRIT,(void*)&card->wandev.critical);
+
+ wanpipe_tty_trigger_tx_irq(card);
+
+ if(card->hw.type != SDLA_S514)
+ s508_unlock(card,&smp_flags);
+ return 0;
+ }
+ }
+ dbg_printk(KERN_INFO "%s: Packet sent OK: %i\n",card->devname,count);
+ clear_bit(SEND_CRIT,(void*)&card->wandev.critical);
+
+ if(card->hw.type != SDLA_S514)
+ s508_unlock(card,&smp_flags);
+
+ return count;
+}
+
+static void wanpipe_tty_receive(sdla_t *card, unsigned addr, unsigned int len)
+{
+ unsigned offset=0;
+ unsigned olen=len;
+ char fp=0;
+ struct tty_struct *tty;
+ int i;
+
+ if (!card->tty_open){
+ dbg_printk(KERN_INFO "%s: TTY not open during receive\n",
+ card->devname);
+ return;
+ }
+
+ if ((tty=card->tty) == NULL){
+ dbg_printk(KERN_INFO "%s: No TTY on receive\n",
+ card->devname);
+ return;
+ }
+
+ if (!tty->driver_data){
+ dbg_printk(KERN_INFO "%s: No Driver Data, or Flip on receive\n",
+ card->devname);
+ return;
+ }
+
+
+ if (card->u.c.async_mode){
+ if ((tty->flip.count+len) >= TTY_FLIPBUF_SIZE){
+ if (net_ratelimit()){
+ printk(KERN_INFO
+ "%s: Received packet size too big: %i bytes, Max: %i!\n",
+ card->devname,len,TTY_FLIPBUF_SIZE);
+ }
+ return;
+ }
+
+
+ if((addr + len) > card->u.c.rx_top + 1) {
+ offset = card->u.c.rx_top - addr + 1;
+
+ sdla_peek(&card->hw, addr, tty->flip.char_buf_ptr, offset);
+
+ addr = card->u.c.rx_base;
+ len -= offset;
+
+ tty->flip.char_buf_ptr+=offset;
+ tty->flip.count+=offset;
+ for (i=0;i<offset;i++){
+ *tty->flip.flag_buf_ptr = 0;
+ tty->flip.flag_buf_ptr++;
+ }
+ }
+
+ sdla_peek(&card->hw, addr, tty->flip.char_buf_ptr, len);
+
+ tty->flip.char_buf_ptr+=len;
+ card->tty->flip.count+=len;
+ for (i=0;i<len;i++){
+ *tty->flip.flag_buf_ptr = 0;
+ tty->flip.flag_buf_ptr++;
+ }
+
+ tty->low_latency=1;
+ tty_flip_buffer_push(tty);
+ }else{
+ if (!card->tty_rx){
+ if (net_ratelimit()){
+ printk(KERN_INFO
+ "%s: Receive sync buffer not available!\n",
+ card->devname);
+ }
+ return;
+ }
+
+ if (len > TTY_CHDLC_MAX_MTU){
+ if (net_ratelimit()){
+ printk(KERN_INFO
+ "%s: Received packet size too big: %i bytes, Max: %i!\n",
+ card->devname,len,TTY_FLIPBUF_SIZE);
+ }
+ return;
+ }
+
+
+ if((addr + len) > card->u.c.rx_top + 1) {
+ offset = card->u.c.rx_top - addr + 1;
+
+ sdla_peek(&card->hw, addr, card->tty_rx, offset);
+
+ addr = card->u.c.rx_base;
+ len -= offset;
+ }
+ sdla_peek(&card->hw, addr, card->tty_rx+offset, len);
+ if (tty->ldisc.receive_buf){
+ tty->ldisc.receive_buf(tty,card->tty_rx,&fp,olen);
+ }else{
+ if (net_ratelimit()){
+ printk(KERN_INFO
+ "%s: NO TTY Sync line discipline!\n",
+ card->devname);
+ }
+ }
+ }
+
+ dbg_printk(KERN_INFO "%s: Received Data %i\n",card->devname,olen);
+ return;
+}
+
+#if 0
+static int wanpipe_tty_ioctl(struct tty_struct *tty, struct file * file,
+ unsigned int cmd, unsigned long arg)
+{
+ return -ENOIOCTLCMD;
+}
+#endif
+
+static void wanpipe_tty_stop(struct tty_struct *tty)
+{
+ return;
+}
+
+static void wanpipe_tty_start(struct tty_struct *tty)
+{
+ return;
+}
+
+static int config_tty (sdla_t *card)
+{
+ SHARED_MEMORY_INFO_STRUCT *flags = card->u.c.flags;
+
+ /* Setup the Board for asynchronous mode */
+ if (card->u.c.async_mode){
+
+ if (set_asy_config(card)) {
+ printk (KERN_INFO "%s: Failed CHDLC Async configuration!\n",
+ card->devname);
+ return -EINVAL;
+ }
+ }else{
+ /* Setup the Board for CHDLC */
+ if (set_chdlc_config(card)) {
+ printk (KERN_INFO "%s: Failed CHDLC configuration!\n",
+ card->devname);
+ return -EINVAL;
+ }
+ }
+
+ /* Set interrupt mode and mask */
+ if (chdlc_set_intr_mode(card, APP_INT_ON_RX_FRAME |
+ APP_INT_ON_GLOBAL_EXCEP_COND |
+ APP_INT_ON_TX_FRAME |
+ APP_INT_ON_CHDLC_EXCEP_COND | APP_INT_ON_TIMER)){
+ printk (KERN_INFO "%s: Failed to set interrupt triggers!\n",
+ card->devname);
+ return -EINVAL;
+ }
+
+
+ /* Mask the Transmit and Timer interrupt */
+ flags->interrupt_info_struct.interrupt_permission &=
+ ~(APP_INT_ON_TX_FRAME | APP_INT_ON_TIMER);
+
+
+ /* Enable communications */
+ if (card->u.c.async_mode){
+ if (asy_comm_enable(card) != 0) {
+ printk(KERN_INFO "%s: Failed to enable async commnunication!\n",
+ card->devname);
+ flags->interrupt_info_struct.interrupt_permission = 0;
+ card->u.c.comm_enabled=0;
+ chdlc_set_intr_mode(card,0);
+ return -EINVAL;
+ }
+ }else{
+ 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 -EINVAL;
+ }
+ }
+
+ /* Initialize Rx/Tx buffer control fields */
+ init_chdlc_tx_rx_buff(card);
+ port_set_state(card, WAN_CONNECTING);
+ return 0;
+}
+
+
+static int change_speed(sdla_t *card, struct tty_struct *tty,
+ struct termios *old_termios)
+{
+ int baud, ret=0;
+ unsigned cflag;
+ int dbits,sbits,parity,handshaking;
+
+ cflag = tty->termios->c_cflag;
+
+ /* There is always one stop bit */
+ sbits=WANOPT_ONE;
+
+ /* Parity is defaulted to NONE */
+ parity = WANOPT_NONE;
+
+ handshaking=0;
+
+ /* byte size and parity */
+ switch (cflag & CSIZE) {
+ case CS5: dbits = 5; break;
+ case CS6: dbits = 6; break;
+ case CS7: dbits = 7; break;
+ case CS8: dbits = 8; break;
+ /* Never happens, but GCC is too dumb to figure it out */
+ default: dbits = 8; break;
+ }
+
+ /* One more stop bit should be supported, thus increment
+ * the number of stop bits Max=2 */
+ if (cflag & CSTOPB) {
+ sbits = WANOPT_TWO;
+ }
+ if (cflag & PARENB) {
+ parity = WANOPT_EVEN;
+ }
+ if (cflag & PARODD){
+ parity = WANOPT_ODD;
+ }
+
+ /* Determine divisor based on baud rate */
+ baud = tty_get_baud_rate(tty);
+
+ if (!baud)
+ baud = 9600; /* B0 transition handled in rs_set_termios */
+
+ if (cflag & CRTSCTS) {
+ handshaking|=ASY_RTS_HS_FOR_RX;
+ }
+
+ if (I_IGNPAR(tty))
+ parity = WANOPT_NONE;
+
+ if (I_IXOFF(tty)){
+ handshaking|=ASY_XON_XOFF_HS_FOR_RX;
+ handshaking|=ASY_XON_XOFF_HS_FOR_TX;
+ }
+
+ if (I_IXON(tty)){
+ handshaking|=ASY_XON_XOFF_HS_FOR_RX;
+ handshaking|=ASY_XON_XOFF_HS_FOR_TX;
+ }
+
+ if (card->u.c.async_mode){
+ if (card->wandev.bps != baud)
+ ret=1;
+ card->wandev.bps = baud;
+ }
+
+ if (card->u.c.async_mode){
+ if (card->u.c.protocol_options != handshaking)
+ ret=1;
+ card->u.c.protocol_options = handshaking;
+
+ if (card->u.c.tx_bits_per_char != dbits)
+ ret=1;
+ card->u.c.tx_bits_per_char = dbits;
+
+ if (card->u.c.rx_bits_per_char != dbits)
+ ret=1;
+ card->u.c.rx_bits_per_char = dbits;
+
+ if (card->u.c.stop_bits != sbits)
+ ret=1;
+ card->u.c.stop_bits = sbits;
+
+ if (card->u.c.parity != parity)
+ ret=1;
+ card->u.c.parity = parity;
+
+ card->u.c.break_timer = 50;
+ card->u.c.inter_char_timer = 10;
+ card->u.c.rx_complete_length = 100;
+ card->u.c.xon_char = 0xFE;
+ }else{
+ card->u.c.protocol_options = HDLC_STREAMING_MODE;
+ }
+
+ return ret;
+}
+
+
+static void wanpipe_tty_set_termios(struct tty_struct *tty, struct termios *old_termios)
+{
+ sdla_t *card;
+ int err=1;
+
+ if (!tty){
+ return;
+ }
+
+ card = (sdla_t *)tty->driver_data;
+
+ if (!card)
+ return;
+
+ if (change_speed(card, tty, old_termios) || !card->u.c.comm_enabled){
+ unsigned long smp_flags;
+
+ if (card->u.c.comm_enabled){
+ lock_adapter_irq(&card->wandev.lock,&smp_flags);
+ chdlc_disable_comm_shutdown(card);
+ unlock_adapter_irq(&card->wandev.lock,&smp_flags);
+ }
+ lock_adapter_irq(&card->wandev.lock,&smp_flags);
+ err = config_tty(card);
+ unlock_adapter_irq(&card->wandev.lock,&smp_flags);
+ if (card->u.c.async_mode){
+ printk(KERN_INFO "%s: TTY Async Configuration:\n"
+ " Baud =%i\n"
+ " Handshaking =%s\n"
+ " Tx Dbits =%i\n"
+ " Rx Dbits =%i\n"
+ " Parity =%s\n"
+ " Stop Bits =%i\n",
+ card->devname,
+ card->wandev.bps,
+ opt_decode[card->u.c.protocol_options],
+ card->u.c.tx_bits_per_char,
+ card->u.c.rx_bits_per_char,
+ p_decode[card->u.c.parity] ,
+ card->u.c.stop_bits);
+ }else{
+ printk(KERN_INFO "%s: TTY Sync Configuration:\n"
+ " Baud =%i\n"
+ " Protocol =HDLC_STREAMING\n",
+ card->devname,card->wandev.bps);
+ }
+ if (!err){
+ port_set_state(card,WAN_CONNECTED);
+ }else{
+ port_set_state(card,WAN_DISCONNECTED);
+ }
+ }
+ return;
+}
+
+static void wanpipe_tty_put_char(struct tty_struct *tty, unsigned char ch)
+{
+ sdla_t *card;
+ unsigned long smp_flags=0;
+
+ if (!tty){
+ return;
+ }
+
+ card = (sdla_t *)tty->driver_data;
+
+ if (!card)
+ return;
+
+ if (card->wandev.state != WAN_CONNECTED)
+ return;
+
+ if(card->hw.type != SDLA_S514)
+ s508_lock(card,&smp_flags);
+
+ if (test_and_set_bit(SEND_CRIT,(void*)&card->wandev.critical)){
+
+ wanpipe_tty_trigger_tx_irq(card);
+
+ if(card->hw.type != SDLA_S514)
+ s508_unlock(card,&smp_flags);
+ return;
+ }
+
+ if (chdlc_send(card,(void*)&ch,1)){
+ wanpipe_tty_trigger_tx_irq(card);
+ dbg_printk("%s: Failed to TX char!\n",card->devname);
+ }
+
+ dbg_printk("%s: Char TX OK\n",card->devname);
+
+ clear_bit(SEND_CRIT,(void*)&card->wandev.critical);
+
+ if(card->hw.type != SDLA_S514)
+ s508_unlock(card,&smp_flags);
+
+ return;
+}
+
+static void wanpipe_tty_flush_chars(struct tty_struct *tty)
+{
+ return;
+}
+
+static void wanpipe_tty_flush_buffer(struct tty_struct *tty)
+{
+ if (!tty)
+ return;
+
+ wake_up_interruptible(&tty->write_wait);
+#if defined(SERIAL_HAVE_POLL_WAIT) || \
+ (defined LINUX_2_1 && LINUX_VERSION_CODE >= KERNEL_VERSION(2,2,15))
+ wake_up_interruptible(&tty->poll_wait);
+#endif
+ if ((tty->flags & (1 << TTY_DO_WRITE_WAKEUP)) &&
+ tty->ldisc.write_wakeup)
+ (tty->ldisc.write_wakeup)(tty);
+
+ return;
+}
+
+/*
+ * This function is used to send a high-priority XON/XOFF character to
+ * the device
+ */
+static void wanpipe_tty_send_xchar(struct tty_struct *tty, char ch)
+{
+ return;
+}
+
+
+static int wanpipe_tty_chars_in_buffer(struct tty_struct *tty)
+{
+ return 0;
+}
+
+
+static int wanpipe_tty_write_room(struct tty_struct *tty)
+{
+ sdla_t *card;
+
+ printk(KERN_INFO "TTY Write Room\n");
+
+ if (!tty){
+ return 0;
+ }
+
+ card = (sdla_t *)tty->driver_data;
+ if (!card)
+ return 0;
+
+ if (card->wandev.state != WAN_CONNECTED)
+ return 0;
+
+ return SEC_MAX_NO_DATA_BYTES_IN_FRAME;
+}
+
+
+static int set_modem_status(sdla_t *card, unsigned char data)
+{
+ CHDLC_MAILBOX_STRUCT *mb = card->mbox;
+ int err;
+
+ mb->buffer_length=1;
+ mb->command=SET_MODEM_STATUS;
+ mb->data[0]=data;
+ err = sdla_exec(mb) ? mb->return_code : CMD_TIMEOUT;
+ if (err != COMMAND_OK)
+ chdlc_error (card, err, mb);
+
+ return err;
+}
+
+static void wanpipe_tty_hangup(struct tty_struct *tty)
+{
+ sdla_t *card;
+ unsigned long smp_flags;
+
+ printk(KERN_INFO "TTY Hangup!\n");
+
+ if (!tty){
+ return;
+ }
+
+ card = (sdla_t *)tty->driver_data;
+ if (!card)
+ return;
+
+ lock_adapter_irq(&card->wandev.lock,&smp_flags);
+ set_modem_status(card,0);
+ unlock_adapter_irq(&card->wandev.lock,&smp_flags);
+ return;
+}
+
+static void wanpipe_tty_break(struct tty_struct *tty, int break_state)
+{
+ return;
+}
+
+static void wanpipe_tty_wait_until_sent(struct tty_struct *tty, int timeout)
+{
+ return;
+}
+
+static void wanpipe_tty_throttle(struct tty_struct * tty)
+{
+ return;
+}
+
+static void wanpipe_tty_unthrottle(struct tty_struct * tty)
+{
+ return;
+}
+
+int wanpipe_tty_read_proc(char *page, char **start, off_t off, int count,
+ int *eof, void *data)
+{
+ return 0;
+}
+
+/*
+ * The serial driver boot-time initialization code!
+ */
+int wanpipe_tty_init(sdla_t *card)
+{
+ struct serial_state * state;
+
+ /* Initialize the tty_driver structure */
+
+ if (card->tty_minor < 0 || card->tty_minor > NR_PORTS){
+ printk(KERN_INFO "%s: Illegal Minor TTY number (0-4): %i\n",
+ card->devname,card->tty_minor);
+ return -EINVAL;
+ }
+
+ if (WAN_CARD(card->tty_minor)){
+ printk(KERN_INFO "%s: TTY Minor %i, already in use\n",
+ card->devname,card->tty_minor);
+ return -EBUSY;
+ }
+
+ if (tty_init_cnt==0){
+
+ printk(KERN_INFO "%s: TTY %s Driver Init: Major %i, Minor Range %i-%i\n",
+ card->devname,
+ card->u.c.async_mode ? "ASYNC" : "SYNC",
+ WAN_TTY_MAJOR,MIN_PORT,MAX_PORT);
+
+ tty_driver_mode = card->u.c.async_mode;
+
+ memset(&serial_driver, 0, sizeof(struct tty_driver));
+ serial_driver.magic = TTY_DRIVER_MAGIC;
+ serial_driver.driver_name = "wanpipe_tty";
+ serial_driver.name = "ttyW";
+ serial_driver.major = WAN_TTY_MAJOR;
+ serial_driver.minor_start = WAN_TTY_MINOR;
+ serial_driver.num = NR_PORTS;
+ serial_driver.type = TTY_DRIVER_TYPE_SERIAL;
+ serial_driver.subtype = SERIAL_TYPE_NORMAL;
+
+ serial_driver.init_termios = tty_std_termios;
+ serial_driver.init_termios.c_cflag =
+ B9600 | CS8 | CREAD | HUPCL | CLOCAL;
+ serial_driver.flags = TTY_DRIVER_REAL_RAW;
+
+ serial_driver.refcount = &serial_refcount;
+ serial_driver.table = serial_table;
+ serial_driver.termios = serial_termios;
+ serial_driver.termios_locked = serial_termios_locked;
+
+ serial_driver.open = wanpipe_tty_open;
+ serial_driver.close = wanpipe_tty_close;
+ serial_driver.write = wanpipe_tty_write;
+
+ serial_driver.put_char = wanpipe_tty_put_char;
+ serial_driver.flush_chars = wanpipe_tty_flush_chars;
+ serial_driver.write_room = wanpipe_tty_write_room;
+ serial_driver.chars_in_buffer = wanpipe_tty_chars_in_buffer;
+ serial_driver.flush_buffer = wanpipe_tty_flush_buffer;
+ //serial_driver.ioctl = wanpipe_tty_ioctl;
+ serial_driver.throttle = wanpipe_tty_throttle;
+ serial_driver.unthrottle = wanpipe_tty_unthrottle;
+ serial_driver.send_xchar = wanpipe_tty_send_xchar;
+ serial_driver.set_termios = wanpipe_tty_set_termios;
+ serial_driver.stop = wanpipe_tty_stop;
+ serial_driver.start = wanpipe_tty_start;
+ serial_driver.hangup = wanpipe_tty_hangup;
+ serial_driver.break_ctl = wanpipe_tty_break;
+ serial_driver.wait_until_sent = wanpipe_tty_wait_until_sent;
+ serial_driver.read_proc = wanpipe_tty_read_proc;
+
+ /*
+ * The callout device is just like normal device except for
+ * major number and the subtype code.
+ */
+ callout_driver = serial_driver;
+ callout_driver.name = "cuw";
+ callout_driver.major = TTYAUX_MAJOR;
+ callout_driver.subtype = SERIAL_TYPE_CALLOUT;
+ callout_driver.read_proc = 0;
+ callout_driver.proc_entry = 0;
+
+ if (tty_register_driver(&serial_driver)){
+ printk(KERN_INFO "%s: Failed to register serial driver!\n",
+ card->devname);
+ }
+
+ if (tty_register_driver(&callout_driver)){
+ printk(KERN_INFO "%s: Failed to register callout driver!\n",
+ card->devname);
+ }
+
+ }
+
+
+ /* The subsequent ports must comply to the initial configuration */
+ if (tty_driver_mode != card->u.c.async_mode){
+ printk(KERN_INFO "%s: Error: TTY Driver operation mode mismatch!\n",
+ card->devname);
+ printk(KERN_INFO "%s: The TTY driver is configured for %s!\n",
+ card->devname, tty_driver_mode ? "ASYNC" : "SYNC");
+ return -EINVAL;
+ }
+
+ tty_init_cnt++;
+
+ printk(KERN_INFO "%s: Initializing TTY %s Driver Minor %i\n",
+ card->devname,
+ tty_driver_mode ? "ASYNC" : "SYNC",
+ card->tty_minor);
+
+ tty_card_map[card->tty_minor] = card;
+ state = &rs_table[card->tty_minor];
+
+ state->magic = SSTATE_MAGIC;
+ state->line = 0;
+ state->type = PORT_UNKNOWN;
+ state->custom_divisor = 0;
+ state->close_delay = 5*HZ/10;
+ state->closing_wait = 30*HZ;
+ state->callout_termios = callout_driver.init_termios;
+ state->normal_termios = serial_driver.init_termios;
+ state->icount.cts = state->icount.dsr =
+ state->icount.rng = state->icount.dcd = 0;
+ state->icount.rx = state->icount.tx = 0;
+ state->icount.frame = state->icount.parity = 0;
+ state->icount.overrun = state->icount.brk = 0;
+ state->irq = card->wandev.irq;
+
+ card->tty_task_queue.routine = tty_poll_task;
+ card->tty_task_queue.data = (void*)card;
+ return 0;
+}
+
+#endif
+
/****** End ****************************************************************/
FUNET's LINUX-ADM group, linux-adm@nic.funet.fi
TCL-scripts by Sam Shen (who was at: slshen@lbl.gov)