4429 lines
121 KiB
C
4429 lines
121 KiB
C
/*****************************************************************************
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* sdla_chdlc.c WANPIPE(tm) Multiprotocol WAN Link Driver. Cisco HDLC module.
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*
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* Authors: Nenad Corbic <ncorbic@sangoma.com>
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* Gideon Hack
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*
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* Copyright: (c) 1995-2001 Sangoma Technologies Inc.
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*
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* This program is free software; you can redistribute it and/or
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* modify it under the terms of the GNU General Public License
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* as published by the Free Software Foundation; either version
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* 2 of the License, or (at your option) any later version.
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* ============================================================================
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* Feb 28, 2001 Nenad Corbic Updated if_tx_timeout() routine for
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* 2.4.X kernels.
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* Jan 25, 2001 Nenad Corbic Added a TTY Sync serial driver over the
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* HDLC streaming protocol
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* Added a TTY Async serial driver over the
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* Async protocol.
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* Dec 15, 2000 Nenad Corbic Updated for 2.4.X Kernel support
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* Nov 13, 2000 Nenad Corbic Added true interface type encoding option.
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* Tcpdump doesn't support CHDLC inteface
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* types, to fix this "true type" option will set
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* the interface type to RAW IP mode.
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* Nov 07, 2000 Nenad Corbic Added security features for UDP debugging:
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* Deny all and specify allowed requests.
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* Jun 20, 2000 Nenad Corbic Fixed the API IP ERROR bug. Caused by the
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* latest update.
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* May 09, 2000 Nenad Corbic Option to bring down an interface
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* upon disconnect.
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* Mar 23, 2000 Nenad Corbic Improved task queue, bh handling.
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* Mar 16, 2000 Nenad Corbic Fixed the SLARP Dynamic IP addressing.
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* Mar 06, 2000 Nenad Corbic Bug Fix: corrupted mbox recovery.
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* Feb 10, 2000 Gideon Hack Added ASYNC support.
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* Feb 09, 2000 Nenad Corbic Fixed two shutdown bugs in update() and
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* if_stats() functions.
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* Jan 24, 2000 Nenad Corbic Fixed a startup wanpipe state racing,
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* condition between if_open and isr.
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* Jan 10, 2000 Nenad Corbic Added new socket API support.
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* Dev 15, 1999 Nenad Corbic Fixed up header files for 2.0.X kernels
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* Nov 20, 1999 Nenad Corbic Fixed zero length API bug.
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* Sep 30, 1999 Nenad Corbic Fixed dynamic IP and route setup.
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* Sep 23, 1999 Nenad Corbic Added SMP support, fixed tracing
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* Sep 13, 1999 Nenad Corbic Split up Port 0 and 1 into separate devices.
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* Jun 02, 1999 Gideon Hack Added support for the S514 adapter.
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* Oct 30, 1998 Jaspreet Singh Added Support for CHDLC API (HDLC STREAMING).
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* Oct 28, 1998 Jaspreet Singh Added Support for Dual Port CHDLC.
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* Aug 07, 1998 David Fong Initial version.
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*****************************************************************************/
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#include <linux/module.h>
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#include <linux/kernel.h> /* printk(), and other useful stuff */
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#include <linux/stddef.h> /* offsetof(), etc. */
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#include <linux/errno.h> /* return codes */
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#include <linux/string.h> /* inline memset(), etc. */
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#include <linux/slab.h> /* kmalloc(), kfree() */
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#include <linux/wanrouter.h> /* WAN router definitions */
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#include <linux/wanpipe.h> /* WANPIPE common user API definitions */
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#include <linux/if_arp.h> /* ARPHRD_* defines */
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#include <asm/uaccess.h>
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#include <linux/inetdevice.h>
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#include <linux/netdevice.h>
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#include <linux/in.h> /* sockaddr_in */
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#include <linux/inet.h>
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#include <linux/if.h>
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#include <asm/byteorder.h> /* htons(), etc. */
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#include <linux/sdlapci.h>
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#include <asm/io.h>
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#include <linux/sdla_chdlc.h> /* CHDLC firmware API definitions */
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#include <linux/sdla_asy.h> /* CHDLC (async) API definitions */
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#include <linux/if_wanpipe_common.h> /* Socket Driver common area */
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#include <linux/if_wanpipe.h>
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/* TTY Includes */
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#include <linux/tty.h>
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#include <linux/tty_flip.h>
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#include <linux/serial.h>
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/****** Defines & Macros ****************************************************/
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/* reasons for enabling the timer interrupt on the adapter */
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#define TMR_INT_ENABLED_UDP 0x01
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#define TMR_INT_ENABLED_UPDATE 0x02
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#define TMR_INT_ENABLED_CONFIG 0x10
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#define MAX_IP_ERRORS 10
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#define TTY_CHDLC_MAX_MTU 2000
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#define CHDLC_DFLT_DATA_LEN 1500 /* default MTU */
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#define CHDLC_HDR_LEN 1
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#define CHDLC_API 0x01
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#define PORT(x) (x == 0 ? "PRIMARY" : "SECONDARY" )
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#define MAX_BH_BUFF 10
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//#define PRINT_DEBUG
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#ifdef PRINT_DEBUG
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#define dbg_printk(format, a...) printk(format, ## a)
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#else
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#define dbg_printk(format, a...)
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#endif
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/******Data Structures*****************************************************/
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/* This structure is placed in the private data area of the device structure.
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* The card structure used to occupy the private area but now the following
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* structure will incorporate the card structure along with CHDLC specific data
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*/
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typedef struct chdlc_private_area
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{
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wanpipe_common_t common;
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sdla_t *card;
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int TracingEnabled; /* For enabling Tracing */
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unsigned long curr_trace_addr; /* Used for Tracing */
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unsigned long start_trace_addr;
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unsigned long end_trace_addr;
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unsigned long base_addr_trace_buffer;
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unsigned long end_addr_trace_buffer;
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unsigned short number_trace_elements;
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unsigned available_buffer_space;
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unsigned long router_start_time;
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unsigned char route_status;
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unsigned char route_removed;
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unsigned long tick_counter; /* For 5s timeout counter */
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unsigned long router_up_time;
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u32 IP_address; /* IP addressing */
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u32 IP_netmask;
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u32 ip_local;
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u32 ip_remote;
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u32 ip_local_tmp;
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u32 ip_remote_tmp;
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u8 ip_error;
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u8 config_chdlc;
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u8 config_chdlc_timeout;
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unsigned char mc; /* Mulitcast support on/off */
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unsigned short udp_pkt_lgth; /* udp packet processing */
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char udp_pkt_src;
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char udp_pkt_data[MAX_LGTH_UDP_MGNT_PKT];
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unsigned short timer_int_enabled;
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char update_comms_stats; /* updating comms stats */
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bh_data_t *bh_head; /* Circular buffer for chdlc_bh */
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unsigned long tq_working;
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volatile int bh_write;
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volatile int bh_read;
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atomic_t bh_buff_used;
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unsigned char interface_down;
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/* Polling work queue entry. Each interface
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* has its own work queue entry, which is used
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* to defer events from the interrupt */
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struct work_struct poll_work;
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struct timer_list poll_delay_timer;
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u8 gateway;
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u8 true_if_encoding;
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//FIXME: add driver stats as per frame relay!
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} chdlc_private_area_t;
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/* Route Status options */
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#define NO_ROUTE 0x00
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#define ADD_ROUTE 0x01
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#define ROUTE_ADDED 0x02
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#define REMOVE_ROUTE 0x03
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/* variable for keeping track of enabling/disabling FT1 monitor status */
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static int rCount = 0;
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/* variable for tracking how many interfaces to open for WANPIPE on the
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two ports */
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extern void disable_irq(unsigned int);
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extern void enable_irq(unsigned int);
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/****** Function Prototypes *************************************************/
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/* WAN link driver entry points. These are called by the WAN router module. */
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static int update(struct wan_device* wandev);
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static int new_if(struct wan_device* wandev, struct net_device* dev,
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wanif_conf_t* conf);
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/* Network device interface */
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static int if_init(struct net_device* dev);
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static int if_open(struct net_device* dev);
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static int if_close(struct net_device* dev);
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static int if_header(struct sk_buff* skb, struct net_device* dev,
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unsigned short type, void* daddr, void* saddr,
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unsigned len);
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static int if_rebuild_hdr (struct sk_buff *skb);
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static struct net_device_stats* if_stats(struct net_device* dev);
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static int if_send(struct sk_buff* skb, struct net_device* dev);
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/* CHDLC Firmware interface functions */
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static int chdlc_configure (sdla_t* card, void* data);
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static int chdlc_comm_enable (sdla_t* card);
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static int chdlc_read_version (sdla_t* card, char* str);
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static int chdlc_set_intr_mode (sdla_t* card, unsigned mode);
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static int chdlc_send (sdla_t* card, void* data, unsigned len);
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static int chdlc_read_comm_err_stats (sdla_t* card);
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static int chdlc_read_op_stats (sdla_t* card);
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static int chdlc_error (sdla_t *card, int err, CHDLC_MAILBOX_STRUCT *mb);
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static int chdlc_disable_comm_shutdown (sdla_t *card);
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static void if_tx_timeout(struct net_device *dev);
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/* Miscellaneous CHDLC Functions */
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static int set_chdlc_config (sdla_t* card);
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static void init_chdlc_tx_rx_buff( sdla_t* card);
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static int process_chdlc_exception(sdla_t *card);
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static int process_global_exception(sdla_t *card);
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static int update_comms_stats(sdla_t* card,
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chdlc_private_area_t* chdlc_priv_area);
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static int configure_ip (sdla_t* card);
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static int unconfigure_ip (sdla_t* card);
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static void process_route(sdla_t *card);
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static void port_set_state (sdla_t *card, int);
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static int config_chdlc (sdla_t *card);
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static void disable_comm (sdla_t *card);
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static void trigger_chdlc_poll(struct net_device *dev);
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static void chdlc_poll(struct net_device *dev);
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static void chdlc_poll_delay (unsigned long dev_ptr);
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/* Miscellaneous asynchronous interface Functions */
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static int set_asy_config (sdla_t* card);
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static int asy_comm_enable (sdla_t* card);
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/* Interrupt handlers */
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static void wpc_isr (sdla_t* card);
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static void rx_intr (sdla_t* card);
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static void timer_intr(sdla_t *);
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/* Bottom half handlers */
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static void chdlc_work(struct net_device *dev);
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static int chdlc_work_cleanup(struct net_device *dev);
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static int bh_enqueue(struct net_device *dev, struct sk_buff *skb);
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/* Miscellaneous functions */
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static int chk_bcast_mcast_addr(sdla_t* card, struct net_device* dev,
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struct sk_buff *skb);
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static int reply_udp( unsigned char *data, unsigned int mbox_len );
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static int intr_test( sdla_t* card);
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static int udp_pkt_type( struct sk_buff *skb , sdla_t* card);
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static int store_udp_mgmt_pkt(char udp_pkt_src, sdla_t* card,
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struct sk_buff *skb, struct net_device* dev,
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chdlc_private_area_t* chdlc_priv_area);
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static int process_udp_mgmt_pkt(sdla_t* card, struct net_device* dev,
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chdlc_private_area_t* chdlc_priv_area);
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static unsigned short calc_checksum (char *, int);
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static void s508_lock (sdla_t *card, unsigned long *smp_flags);
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static void s508_unlock (sdla_t *card, unsigned long *smp_flags);
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static int Intr_test_counter;
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/* TTY Global Definitions */
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#define NR_PORTS 4
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#define WAN_TTY_MAJOR 226
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#define WAN_TTY_MINOR 0
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#define WAN_CARD(port) (tty_card_map[port])
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#define MIN_PORT 0
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#define MAX_PORT NR_PORTS-1
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#define CRC_LENGTH 2
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static int wanpipe_tty_init(sdla_t *card);
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static void wanpipe_tty_receive(sdla_t *, unsigned, unsigned int);
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static void wanpipe_tty_trigger_poll(sdla_t *card);
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static struct tty_driver serial_driver;
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static int tty_init_cnt=0;
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static struct serial_state rs_table[NR_PORTS];
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static char tty_driver_mode=WANOPT_TTY_SYNC;
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static char *opt_decode[] = {"NONE","CRTSCTS","XONXOFF-RX",
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"CRTSCTS XONXOFF-RX","XONXOFF-TX",
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"CRTSCTS XONXOFF-TX","CRTSCTS XONXOFF"};
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static char *p_decode[] = {"NONE","ODD","EVEN"};
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static void* tty_card_map[NR_PORTS] = {NULL,NULL,NULL,NULL};
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/****** Public Functions ****************************************************/
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/*============================================================================
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* Cisco HDLC protocol initialization routine.
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*
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* This routine is called by the main WANPIPE module during setup. At this
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* point adapter is completely initialized and firmware is running.
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* o read firmware version (to make sure it's alive)
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* o configure adapter
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* o initialize protocol-specific fields of the adapter data space.
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*
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* Return: 0 o.k.
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* < 0 failure.
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*/
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int wpc_init (sdla_t* card, wandev_conf_t* conf)
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{
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unsigned char port_num;
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int err;
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unsigned long max_permitted_baud = 0;
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SHARED_MEMORY_INFO_STRUCT *flags;
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union
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{
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char str[80];
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} u;
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volatile CHDLC_MAILBOX_STRUCT* mb;
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CHDLC_MAILBOX_STRUCT* mb1;
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unsigned long timeout;
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/* Verify configuration ID */
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if (conf->config_id != WANCONFIG_CHDLC) {
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printk(KERN_INFO "%s: invalid configuration ID %u!\n",
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card->devname, conf->config_id);
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return -EINVAL;
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}
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/* Find out which Port to use */
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if ((conf->comm_port == WANOPT_PRI) || (conf->comm_port == WANOPT_SEC)){
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if (card->next){
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if (conf->comm_port != card->next->u.c.comm_port){
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card->u.c.comm_port = conf->comm_port;
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}else{
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printk(KERN_INFO "%s: ERROR - %s port used!\n",
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card->wandev.name, PORT(conf->comm_port));
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return -EINVAL;
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}
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}else{
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card->u.c.comm_port = conf->comm_port;
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}
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}else{
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printk(KERN_INFO "%s: ERROR - Invalid Port Selected!\n",
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card->wandev.name);
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return -EINVAL;
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}
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/* Initialize protocol-specific fields */
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if(card->hw.type != SDLA_S514){
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if (card->u.c.comm_port == WANOPT_PRI){
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card->mbox = (void *) card->hw.dpmbase;
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}else{
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card->mbox = (void *) card->hw.dpmbase +
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SEC_BASE_ADDR_MB_STRUCT - PRI_BASE_ADDR_MB_STRUCT;
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}
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}else{
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/* for a S514 adapter, set a pointer to the actual mailbox in the */
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/* allocated virtual memory area */
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if (card->u.c.comm_port == WANOPT_PRI){
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card->mbox = (void *) card->hw.dpmbase + PRI_BASE_ADDR_MB_STRUCT;
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}else{
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card->mbox = (void *) card->hw.dpmbase + SEC_BASE_ADDR_MB_STRUCT;
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}
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}
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mb = mb1 = card->mbox;
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if (!card->configured){
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/* The board will place an 'I' in the return code to indicate that it is
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ready to accept commands. We expect this to be completed in less
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than 1 second. */
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timeout = jiffies;
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while (mb->return_code != 'I') /* Wait 1s for board to initialize */
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if ((jiffies - timeout) > 1*HZ) break;
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if (mb->return_code != 'I') {
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printk(KERN_INFO
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"%s: Initialization not completed by adapter\n",
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card->devname);
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printk(KERN_INFO "Please contact Sangoma representative.\n");
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return -EIO;
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}
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}
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/* Read firmware version. Note that when adapter initializes, it
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* clears the mailbox, so it may appear that the first command was
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* executed successfully when in fact it was merely erased. To work
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* around this, we execute the first command twice.
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*/
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if (chdlc_read_version(card, u.str))
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return -EIO;
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printk(KERN_INFO "%s: Running Cisco HDLC firmware v%s\n",
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card->devname, u.str);
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card->isr = &wpc_isr;
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card->poll = NULL;
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card->exec = NULL;
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card->wandev.update = &update;
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card->wandev.new_if = &new_if;
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card->wandev.del_if = NULL;
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card->wandev.udp_port = conf->udp_port;
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card->disable_comm = &disable_comm;
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card->wandev.new_if_cnt = 0;
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/* reset the number of times the 'update()' proc has been called */
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card->u.c.update_call_count = 0;
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card->wandev.ttl = conf->ttl;
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card->wandev.interface = conf->interface;
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if ((card->u.c.comm_port == WANOPT_SEC && conf->interface == WANOPT_V35)&&
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card->hw.type != SDLA_S514){
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printk(KERN_INFO "%s: ERROR - V35 Interface not supported on S508 %s port \n",
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card->devname, PORT(card->u.c.comm_port));
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return -EIO;
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}
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card->wandev.clocking = conf->clocking;
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port_num = card->u.c.comm_port;
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/* in API mode, we can configure for "receive only" buffering */
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if(card->hw.type == SDLA_S514) {
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card->u.c.receive_only = conf->receive_only;
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if(conf->receive_only) {
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printk(KERN_INFO
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"%s: Configured for 'receive only' mode\n",
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card->devname);
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}
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}
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/* Setup Port Bps */
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if(card->wandev.clocking) {
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if((port_num == WANOPT_PRI) || card->u.c.receive_only) {
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/* For Primary Port 0 */
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max_permitted_baud =
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(card->hw.type == SDLA_S514) ?
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PRI_MAX_BAUD_RATE_S514 :
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PRI_MAX_BAUD_RATE_S508;
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}else if(port_num == WANOPT_SEC) {
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/* For Secondary Port 1 */
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max_permitted_baud =
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(card->hw.type == SDLA_S514) ?
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SEC_MAX_BAUD_RATE_S514 :
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SEC_MAX_BAUD_RATE_S508;
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}
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if(conf->bps > max_permitted_baud) {
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conf->bps = max_permitted_baud;
|
|
printk(KERN_INFO "%s: Baud too high!\n",
|
|
card->wandev.name);
|
|
printk(KERN_INFO "%s: Baud rate set to %lu bps\n",
|
|
card->wandev.name, max_permitted_baud);
|
|
}
|
|
card->wandev.bps = conf->bps;
|
|
}else{
|
|
card->wandev.bps = 0;
|
|
}
|
|
|
|
/* Setup the Port MTU */
|
|
if((port_num == WANOPT_PRI) || card->u.c.receive_only) {
|
|
|
|
/* For Primary Port 0 */
|
|
card->wandev.mtu =
|
|
(conf->mtu >= MIN_LGTH_CHDLC_DATA_CFG) ?
|
|
min_t(unsigned int, conf->mtu, PRI_MAX_NO_DATA_BYTES_IN_FRAME) :
|
|
CHDLC_DFLT_DATA_LEN;
|
|
} else if(port_num == WANOPT_SEC) {
|
|
/* For Secondary Port 1 */
|
|
card->wandev.mtu =
|
|
(conf->mtu >= MIN_LGTH_CHDLC_DATA_CFG) ?
|
|
min_t(unsigned int, conf->mtu, SEC_MAX_NO_DATA_BYTES_IN_FRAME) :
|
|
CHDLC_DFLT_DATA_LEN;
|
|
}
|
|
|
|
/* Set up the interrupt status area */
|
|
/* Read the CHDLC Configuration and obtain:
|
|
* Ptr to shared memory infor struct
|
|
* Use this pointer to calculate the value of card->u.c.flags !
|
|
*/
|
|
mb1->buffer_length = 0;
|
|
mb1->command = READ_CHDLC_CONFIGURATION;
|
|
err = sdla_exec(mb1) ? mb1->return_code : CMD_TIMEOUT;
|
|
if(err != COMMAND_OK) {
|
|
if(card->hw.type != SDLA_S514)
|
|
enable_irq(card->hw.irq);
|
|
|
|
chdlc_error(card, err, mb1);
|
|
return -EIO;
|
|
}
|
|
|
|
if(card->hw.type == SDLA_S514){
|
|
card->u.c.flags = (void *)(card->hw.dpmbase +
|
|
(((CHDLC_CONFIGURATION_STRUCT *)mb1->data)->
|
|
ptr_shared_mem_info_struct));
|
|
}else{
|
|
card->u.c.flags = (void *)(card->hw.dpmbase +
|
|
(((CHDLC_CONFIGURATION_STRUCT *)mb1->data)->
|
|
ptr_shared_mem_info_struct % SDLA_WINDOWSIZE));
|
|
}
|
|
|
|
flags = card->u.c.flags;
|
|
|
|
/* This is for the ports link state */
|
|
card->wandev.state = WAN_DUALPORT;
|
|
card->u.c.state = WAN_DISCONNECTED;
|
|
|
|
|
|
if (!card->wandev.piggyback){
|
|
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){
|
|
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{
|
|
|
|
|
|
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;
|
|
}
|
|
|
|
/******* WAN Device Driver Entry Points *************************************/
|
|
|
|
/*============================================================================
|
|
* Update device status & statistics
|
|
* This procedure is called when updating the PROC file system and returns
|
|
* various communications statistics. These statistics are accumulated from 3
|
|
* different locations:
|
|
* 1) The 'if_stats' recorded for the device.
|
|
* 2) Communication error statistics on the adapter.
|
|
* 3) CHDLC operational statistics on the adapter.
|
|
* The board level statistics are read during a timer interrupt. Note that we
|
|
* read the error and operational statistics during consecitive timer ticks so
|
|
* as to minimize the time that we are inside the interrupt handler.
|
|
*
|
|
*/
|
|
static int update(struct wan_device* wandev)
|
|
{
|
|
sdla_t* card = wandev->private;
|
|
struct net_device* dev;
|
|
volatile chdlc_private_area_t* chdlc_priv_area;
|
|
SHARED_MEMORY_INFO_STRUCT *flags;
|
|
unsigned long timeout;
|
|
|
|
/* sanity checks */
|
|
if((wandev == NULL) || (wandev->private == NULL))
|
|
return -EFAULT;
|
|
|
|
if(wandev->state == WAN_UNCONFIGURED)
|
|
return -ENODEV;
|
|
|
|
/* more sanity checks */
|
|
if(!card->u.c.flags)
|
|
return -ENODEV;
|
|
|
|
if(test_bit(PERI_CRIT, (void*)&card->wandev.critical))
|
|
return -EAGAIN;
|
|
|
|
if((dev=card->wandev.dev) == NULL)
|
|
return -ENODEV;
|
|
|
|
if((chdlc_priv_area=dev->priv) == NULL)
|
|
return -ENODEV;
|
|
|
|
flags = card->u.c.flags;
|
|
if(chdlc_priv_area->update_comms_stats){
|
|
return -EAGAIN;
|
|
}
|
|
|
|
/* we will need 2 timer interrupts to complete the */
|
|
/* reading of the statistics */
|
|
chdlc_priv_area->update_comms_stats = 2;
|
|
flags->interrupt_info_struct.interrupt_permission |= APP_INT_ON_TIMER;
|
|
chdlc_priv_area->timer_int_enabled = TMR_INT_ENABLED_UPDATE;
|
|
|
|
/* wait a maximum of 1 second for the statistics to be updated */
|
|
timeout = jiffies;
|
|
for(;;) {
|
|
if(chdlc_priv_area->update_comms_stats == 0)
|
|
break;
|
|
if ((jiffies - timeout) > (1 * HZ)){
|
|
chdlc_priv_area->update_comms_stats = 0;
|
|
chdlc_priv_area->timer_int_enabled &=
|
|
~TMR_INT_ENABLED_UPDATE;
|
|
return -EAGAIN;
|
|
}
|
|
}
|
|
|
|
return 0;
|
|
}
|
|
|
|
|
|
/*============================================================================
|
|
* Create new logical channel.
|
|
* This routine is called by the router when ROUTER_IFNEW IOCTL is being
|
|
* handled.
|
|
* o parse media- and hardware-specific configuration
|
|
* o make sure that a new channel can be created
|
|
* o allocate resources, if necessary
|
|
* o prepare network device structure for registaration.
|
|
*
|
|
* Return: 0 o.k.
|
|
* < 0 failure (channel will not be created)
|
|
*/
|
|
static int new_if(struct wan_device* wandev, struct net_device* 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",
|
|
card->devname);
|
|
return -EINVAL;
|
|
}
|
|
|
|
/* allocate and initialize private data */
|
|
chdlc_priv_area = kmalloc(sizeof(chdlc_private_area_t), GFP_KERNEL);
|
|
|
|
if(chdlc_priv_area == NULL)
|
|
return -ENOMEM;
|
|
|
|
memset(chdlc_priv_area, 0, sizeof(chdlc_private_area_t));
|
|
|
|
chdlc_priv_area->card = card;
|
|
chdlc_priv_area->common.sk = NULL;
|
|
chdlc_priv_area->common.func = NULL;
|
|
|
|
/* initialize data */
|
|
strcpy(card->u.c.if_name, conf->name);
|
|
|
|
if(card->wandev.new_if_cnt > 0) {
|
|
kfree(chdlc_priv_area);
|
|
return -EEXIST;
|
|
}
|
|
|
|
card->wandev.new_if_cnt++;
|
|
|
|
chdlc_priv_area->TracingEnabled = 0;
|
|
chdlc_priv_area->route_status = NO_ROUTE;
|
|
chdlc_priv_area->route_removed = 0;
|
|
|
|
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(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(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;
|
|
}
|
|
|
|
if(!card->wandev.clocking) {
|
|
printk(KERN_INFO
|
|
"%s: Asynch. clocking must be 'Internal'\n",
|
|
wandev->name);
|
|
kfree(chdlc_priv_area);
|
|
return -EINVAL;
|
|
}
|
|
|
|
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.api_options = 0;
|
|
if (conf->asy_data_trans == WANOPT_YES) {
|
|
card->u.c.api_options |= ASY_RX_DATA_TRANSPARENT;
|
|
}
|
|
|
|
card->u.c.protocol_options = 0;
|
|
if (conf->rts_hs_for_receive == WANOPT_YES) {
|
|
card->u.c.protocol_options |= ASY_RTS_HS_FOR_RX;
|
|
}
|
|
if (conf->xon_xoff_hs_for_receive == WANOPT_YES) {
|
|
card->u.c.protocol_options |= ASY_XON_XOFF_HS_FOR_RX;
|
|
}
|
|
if (conf->xon_xoff_hs_for_transmit == WANOPT_YES) {
|
|
card->u.c.protocol_options |= ASY_XON_XOFF_HS_FOR_TX;
|
|
}
|
|
if (conf->dcd_hs_for_transmit == WANOPT_YES) {
|
|
card->u.c.protocol_options |= ASY_DCD_HS_FOR_TX;
|
|
}
|
|
if (conf->cts_hs_for_transmit == WANOPT_YES) {
|
|
card->u.c.protocol_options |= ASY_CTS_HS_FOR_TX;
|
|
}
|
|
|
|
card->u.c.tx_bits_per_char = conf->tx_bits_per_char;
|
|
card->u.c.rx_bits_per_char = conf->rx_bits_per_char;
|
|
card->u.c.stop_bits = conf->stop_bits;
|
|
card->u.c.parity = conf->parity;
|
|
card->u.c.break_timer = conf->break_timer;
|
|
card->u.c.inter_char_timer = conf->inter_char_timer;
|
|
card->u.c.rx_complete_length = conf->rx_complete_length;
|
|
card->u.c.xon_char = conf->xon_char;
|
|
|
|
} else { /* setup 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_t(unsigned int, 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_t(unsigned int, 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_t(unsigned int, 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_t(unsigned int, conf->slarp_timer, MAX_SLARP_REQ_TIMER) :
|
|
DEFAULT_SLARP_REQ_TIMER;
|
|
|
|
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) {
|
|
|
|
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) {
|
|
card->u.c.usedby = API;
|
|
printk(KERN_INFO "%s: Running in API mode !\n",
|
|
wandev->name);
|
|
}
|
|
}
|
|
|
|
/* 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);
|
|
}
|
|
|
|
/* Get Multicast Information */
|
|
chdlc_priv_area->mc = conf->mc;
|
|
|
|
/* prepare network device data space for registration */
|
|
strcpy(dev->name,card->u.c.if_name);
|
|
|
|
dev->init = &if_init;
|
|
dev->priv = chdlc_priv_area;
|
|
|
|
/* Initialize the polling work routine */
|
|
INIT_WORK(&chdlc_priv_area->poll_work, (void*)(void*)chdlc_poll, 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;
|
|
}
|
|
|
|
|
|
/****** Network Device Interface ********************************************/
|
|
|
|
/*============================================================================
|
|
* Initialize Linux network interface.
|
|
*
|
|
* This routine is called only once for each interface, during Linux network
|
|
* interface registration. Returning anything but zero will fail interface
|
|
* registration.
|
|
*/
|
|
static int if_init(struct net_device* dev)
|
|
{
|
|
chdlc_private_area_t* chdlc_priv_area = dev->priv;
|
|
sdla_t* card = chdlc_priv_area->card;
|
|
struct wan_device* wandev = &card->wandev;
|
|
|
|
/* Initialize device driver entry points */
|
|
dev->open = &if_open;
|
|
dev->stop = &if_close;
|
|
dev->hard_header = &if_header;
|
|
dev->rebuild_header = &if_rebuild_hdr;
|
|
dev->hard_start_xmit = &if_send;
|
|
dev->get_stats = &if_stats;
|
|
dev->tx_timeout = &if_tx_timeout;
|
|
dev->watchdog_timeo = TX_TIMEOUT;
|
|
|
|
/* Initialize media-specific parameters */
|
|
dev->flags |= IFF_POINTOPOINT;
|
|
dev->flags |= IFF_NOARP;
|
|
|
|
/* Enable Mulitcasting if user selected */
|
|
if (chdlc_priv_area->mc == WANOPT_YES){
|
|
dev->flags |= IFF_MULTICAST;
|
|
}
|
|
|
|
if (chdlc_priv_area->true_if_encoding){
|
|
dev->type = ARPHRD_HDLC; /* This breaks the tcpdump */
|
|
}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 */
|
|
dev->irq = wandev->irq;
|
|
dev->dma = wandev->dma;
|
|
dev->base_addr = wandev->ioport;
|
|
dev->mem_start = wandev->maddr;
|
|
dev->mem_end = wandev->maddr + wandev->msize - 1;
|
|
|
|
/* Set transmit buffer queue length
|
|
* If too low packets will not be retransmitted
|
|
* by stack.
|
|
*/
|
|
dev->tx_queue_len = 100;
|
|
SET_MODULE_OWNER(dev);
|
|
|
|
return 0;
|
|
}
|
|
|
|
/*============================================================================
|
|
* Open network interface.
|
|
* o enable communications and interrupts.
|
|
* o prevent module from unloading by incrementing use count
|
|
*
|
|
* Return 0 if O.k. or errno.
|
|
*/
|
|
static int if_open(struct net_device* dev)
|
|
{
|
|
chdlc_private_area_t* chdlc_priv_area = dev->priv;
|
|
sdla_t* card = chdlc_priv_area->card;
|
|
struct timeval tv;
|
|
int err = 0;
|
|
|
|
/* Only one open per interface is allowed */
|
|
|
|
if (netif_running(dev))
|
|
return -EBUSY;
|
|
|
|
/* Initialize the work queue entry */
|
|
chdlc_priv_area->tq_working=0;
|
|
|
|
INIT_WORK(&chdlc_priv_area->common.wanpipe_work,
|
|
(void *)(void *)chdlc_work, 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);
|
|
|
|
do_gettimeofday(&tv);
|
|
chdlc_priv_area->router_start_time = tv.tv_sec;
|
|
|
|
netif_start_queue(dev);
|
|
|
|
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;
|
|
|
|
/* Start the CHDLC configuration after 1sec delay.
|
|
* This will give the interface initilization time
|
|
* to finish its configuration */
|
|
mod_timer(&chdlc_priv_area->poll_delay_timer, jiffies + HZ);
|
|
return err;
|
|
}
|
|
|
|
/*============================================================================
|
|
* Close network interface.
|
|
* o if this is the last close, then disable communications and interrupts.
|
|
* o reset flags.
|
|
*/
|
|
static int if_close(struct net_device* dev)
|
|
{
|
|
chdlc_private_area_t* chdlc_priv_area = dev->priv;
|
|
sdla_t* card = chdlc_priv_area->card;
|
|
|
|
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){
|
|
dev_kfree_skb_any(skb);
|
|
}
|
|
}
|
|
kfree(chdlc_priv_area->bh_head);
|
|
chdlc_priv_area->bh_head=NULL;
|
|
}
|
|
|
|
netif_stop_queue(dev);
|
|
wanpipe_close(card);
|
|
del_timer(&chdlc_priv_area->poll_delay_timer);
|
|
return 0;
|
|
}
|
|
|
|
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;
|
|
}
|
|
|
|
if (!tty_init_cnt)
|
|
return;
|
|
|
|
if (card->tty_opt){
|
|
struct serial_state * state;
|
|
if (!(--tty_init_cnt)){
|
|
int e1;
|
|
serial_driver.refcount=0;
|
|
|
|
if ((e1 = tty_unregister_driver(&serial_driver)))
|
|
printk("SERIAL: failed to unregister serial driver (%d)\n",
|
|
e1);
|
|
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));
|
|
}
|
|
return;
|
|
}
|
|
|
|
|
|
/*============================================================================
|
|
* Build media header.
|
|
*
|
|
* The trick here is to put packet type (Ethertype) into 'protocol' field of
|
|
* the socket buffer, so that we don't forget it. If packet type is not
|
|
* supported, set skb->protocol to 0 and discard packet later.
|
|
*
|
|
* Return: media header length.
|
|
*/
|
|
static int if_header(struct sk_buff* skb, struct net_device* dev,
|
|
unsigned short type, void* daddr, void* saddr,
|
|
unsigned len)
|
|
{
|
|
skb->protocol = htons(type);
|
|
|
|
return CHDLC_HDR_LEN;
|
|
}
|
|
|
|
|
|
/*============================================================================
|
|
* Handle transmit timeout event from netif watchdog
|
|
*/
|
|
static void if_tx_timeout(struct net_device *dev)
|
|
{
|
|
chdlc_private_area_t* chan = dev->priv;
|
|
sdla_t *card = chan->card;
|
|
|
|
/* If our device stays busy for at least 5 seconds then we will
|
|
* kick start the device by making dev->tbusy = 0. We expect
|
|
* that our device never stays busy more than 5 seconds. So this
|
|
* is only used as a last resort.
|
|
*/
|
|
|
|
++card->wandev.stats.collisions;
|
|
|
|
printk (KERN_INFO "%s: Transmit timed out on %s\n", card->devname,dev->name);
|
|
netif_wake_queue (dev);
|
|
}
|
|
|
|
|
|
|
|
/*============================================================================
|
|
* Re-build media header.
|
|
*
|
|
* Return: 1 physical address resolved.
|
|
* 0 physical address not resolved
|
|
*/
|
|
static int if_rebuild_hdr (struct sk_buff *skb)
|
|
{
|
|
return 1;
|
|
}
|
|
|
|
|
|
/*============================================================================
|
|
* Send a packet on a network interface.
|
|
* o set tbusy flag (marks start of the transmission) to block a timer-based
|
|
* transmit from overlapping.
|
|
* o check link state. If link is not up, then drop the packet.
|
|
* o execute adapter send command.
|
|
* o free socket buffer
|
|
*
|
|
* Return: 0 complete (socket buffer must be freed)
|
|
* non-0 packet may be re-transmitted (tbusy must be set)
|
|
*
|
|
* Notes:
|
|
* 1. This routine is called either by the protocol stack or by the "net
|
|
* bottom half" (with interrupts enabled).
|
|
* 2. Setting tbusy flag will inhibit further transmit requests from the
|
|
* protocol stack and can be used for flow control with protocol layer.
|
|
*/
|
|
static int if_send(struct sk_buff* skb, struct net_device* dev)
|
|
{
|
|
chdlc_private_area_t *chdlc_priv_area = dev->priv;
|
|
sdla_t *card = chdlc_priv_area->card;
|
|
SHARED_MEMORY_INFO_STRUCT *flags = card->u.c.flags;
|
|
INTERRUPT_INFORMATION_STRUCT *chdlc_int = &flags->interrupt_info_struct;
|
|
int udp_type = 0;
|
|
unsigned long smp_flags;
|
|
int err=0;
|
|
|
|
netif_stop_queue(dev);
|
|
|
|
if (skb == NULL){
|
|
/* If we get here, some higher layer thinks we've missed an
|
|
* tx-done interrupt.
|
|
*/
|
|
printk(KERN_INFO "%s: interface %s got kicked!\n",
|
|
card->devname, dev->name);
|
|
|
|
netif_wake_queue(dev);
|
|
return 0;
|
|
}
|
|
|
|
if (ntohs(skb->protocol) != htons(PVC_PROT)){
|
|
|
|
/* check the udp packet type */
|
|
|
|
udp_type = udp_pkt_type(skb, card);
|
|
|
|
if (udp_type == UDP_CPIPE_TYPE){
|
|
if(store_udp_mgmt_pkt(UDP_PKT_FRM_STACK, card, skb, dev,
|
|
chdlc_priv_area)){
|
|
chdlc_int->interrupt_permission |=
|
|
APP_INT_ON_TIMER;
|
|
}
|
|
netif_start_queue(dev);
|
|
return 0;
|
|
}
|
|
|
|
/* check to see if the source IP address is a broadcast or */
|
|
/* multicast IP address */
|
|
if(chk_bcast_mcast_addr(card, dev, skb)){
|
|
++card->wandev.stats.tx_dropped;
|
|
dev_kfree_skb_any(skb);
|
|
netif_start_queue(dev);
|
|
return 0;
|
|
}
|
|
}
|
|
|
|
/* Lock the 508 Card: SMP is supported */
|
|
if(card->hw.type != SDLA_S514){
|
|
s508_lock(card,&smp_flags);
|
|
}
|
|
|
|
if(test_and_set_bit(SEND_CRIT, (void*)&card->wandev.critical)) {
|
|
|
|
printk(KERN_INFO "%s: Critical in if_send: %lx\n",
|
|
card->wandev.name,card->wandev.critical);
|
|
++card->wandev.stats.tx_dropped;
|
|
netif_start_queue(dev);
|
|
goto if_send_exit_crit;
|
|
}
|
|
|
|
if(card->u.c.state != WAN_CONNECTED){
|
|
++card->wandev.stats.tx_dropped;
|
|
netif_start_queue(dev);
|
|
|
|
}else if(!skb->protocol){
|
|
++card->wandev.stats.tx_errors;
|
|
netif_start_queue(dev);
|
|
|
|
}else {
|
|
void* data = skb->data;
|
|
unsigned len = skb->len;
|
|
unsigned char attr;
|
|
|
|
/* If it's an API packet pull off the API
|
|
* header. Also check that the packet size
|
|
* is larger than the API header
|
|
*/
|
|
if (card->u.c.usedby == API){
|
|
api_tx_hdr_t* api_tx_hdr;
|
|
|
|
/* 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;
|
|
netif_start_queue(dev);
|
|
goto if_send_exit_crit;
|
|
}
|
|
|
|
api_tx_hdr = (api_tx_hdr_t *)data;
|
|
attr = api_tx_hdr->attr;
|
|
data += sizeof(api_tx_hdr_t);
|
|
len -= sizeof(api_tx_hdr_t);
|
|
}
|
|
|
|
if(chdlc_send(card, data, len)) {
|
|
netif_stop_queue(dev);
|
|
}else{
|
|
++card->wandev.stats.tx_packets;
|
|
card->wandev.stats.tx_bytes += len;
|
|
|
|
netif_start_queue(dev);
|
|
|
|
dev->trans_start = jiffies;
|
|
}
|
|
}
|
|
|
|
if_send_exit_crit:
|
|
|
|
if (!(err=netif_queue_stopped(dev))) {
|
|
dev_kfree_skb_any(skb);
|
|
}else{
|
|
chdlc_priv_area->tick_counter = jiffies;
|
|
chdlc_int->interrupt_permission |= APP_INT_ON_TX_FRAME;
|
|
}
|
|
|
|
clear_bit(SEND_CRIT, (void*)&card->wandev.critical);
|
|
if(card->hw.type != SDLA_S514){
|
|
s508_unlock(card,&smp_flags);
|
|
}
|
|
|
|
return err;
|
|
}
|
|
|
|
|
|
/*============================================================================
|
|
* Check to see if the packet to be transmitted contains a broadcast or
|
|
* multicast source IP address.
|
|
*/
|
|
|
|
static int chk_bcast_mcast_addr(sdla_t *card, struct net_device* dev,
|
|
struct sk_buff *skb)
|
|
{
|
|
u32 src_ip_addr;
|
|
u32 broadcast_ip_addr = 0;
|
|
struct in_device *in_dev;
|
|
|
|
/* read the IP source address from the outgoing packet */
|
|
src_ip_addr = *(u32 *)(skb->data + 12);
|
|
|
|
/* read the IP broadcast address for the device */
|
|
in_dev = dev->ip_ptr;
|
|
if(in_dev != NULL) {
|
|
struct in_ifaddr *ifa= in_dev->ifa_list;
|
|
if(ifa != NULL)
|
|
broadcast_ip_addr = ifa->ifa_broadcast;
|
|
else
|
|
return 0;
|
|
}
|
|
|
|
/* check if the IP Source Address is a Broadcast address */
|
|
if((dev->flags & IFF_BROADCAST) && (src_ip_addr == broadcast_ip_addr)) {
|
|
printk(KERN_INFO "%s: Broadcast Source Address silently discarded\n",
|
|
card->devname);
|
|
return 1;
|
|
}
|
|
|
|
/* check if the IP Source Address is a Multicast address */
|
|
if((ntohl(src_ip_addr) >= 0xE0000001) &&
|
|
(ntohl(src_ip_addr) <= 0xFFFFFFFE)) {
|
|
printk(KERN_INFO "%s: Multicast Source Address silently discarded\n",
|
|
card->devname);
|
|
return 1;
|
|
}
|
|
|
|
return 0;
|
|
}
|
|
|
|
|
|
/*============================================================================
|
|
* Reply to UDP Management system.
|
|
* Return length of reply.
|
|
*/
|
|
static int reply_udp( unsigned char *data, unsigned int mbox_len )
|
|
{
|
|
|
|
unsigned short len, udp_length, temp, ip_length;
|
|
unsigned long ip_temp;
|
|
int even_bound = 0;
|
|
chdlc_udp_pkt_t *c_udp_pkt = (chdlc_udp_pkt_t *)data;
|
|
|
|
/* Set length of packet */
|
|
len = sizeof(ip_pkt_t)+
|
|
sizeof(udp_pkt_t)+
|
|
sizeof(wp_mgmt_t)+
|
|
sizeof(cblock_t)+
|
|
sizeof(trace_info_t)+
|
|
mbox_len;
|
|
|
|
/* fill in UDP reply */
|
|
c_udp_pkt->wp_mgmt.request_reply = UDPMGMT_REPLY;
|
|
|
|
/* fill in UDP length */
|
|
udp_length = sizeof(udp_pkt_t)+
|
|
sizeof(wp_mgmt_t)+
|
|
sizeof(cblock_t)+
|
|
sizeof(trace_info_t)+
|
|
mbox_len;
|
|
|
|
/* put it on an even boundary */
|
|
if ( udp_length & 0x0001 ) {
|
|
udp_length += 1;
|
|
len += 1;
|
|
even_bound = 1;
|
|
}
|
|
|
|
temp = (udp_length<<8)|(udp_length>>8);
|
|
c_udp_pkt->udp_pkt.udp_length = temp;
|
|
|
|
/* swap UDP ports */
|
|
temp = c_udp_pkt->udp_pkt.udp_src_port;
|
|
c_udp_pkt->udp_pkt.udp_src_port =
|
|
c_udp_pkt->udp_pkt.udp_dst_port;
|
|
c_udp_pkt->udp_pkt.udp_dst_port = temp;
|
|
|
|
/* add UDP pseudo header */
|
|
temp = 0x1100;
|
|
*((unsigned short *)(c_udp_pkt->data+mbox_len+even_bound)) = temp;
|
|
temp = (udp_length<<8)|(udp_length>>8);
|
|
*((unsigned short *)(c_udp_pkt->data+mbox_len+even_bound+2)) = temp;
|
|
|
|
|
|
/* calculate UDP checksum */
|
|
c_udp_pkt->udp_pkt.udp_checksum = 0;
|
|
c_udp_pkt->udp_pkt.udp_checksum = calc_checksum(&data[UDP_OFFSET],udp_length+UDP_OFFSET);
|
|
|
|
/* fill in IP length */
|
|
ip_length = len;
|
|
temp = (ip_length<<8)|(ip_length>>8);
|
|
c_udp_pkt->ip_pkt.total_length = temp;
|
|
|
|
/* swap IP addresses */
|
|
ip_temp = c_udp_pkt->ip_pkt.ip_src_address;
|
|
c_udp_pkt->ip_pkt.ip_src_address = c_udp_pkt->ip_pkt.ip_dst_address;
|
|
c_udp_pkt->ip_pkt.ip_dst_address = ip_temp;
|
|
|
|
/* fill in IP checksum */
|
|
c_udp_pkt->ip_pkt.hdr_checksum = 0;
|
|
c_udp_pkt->ip_pkt.hdr_checksum = calc_checksum(data,sizeof(ip_pkt_t));
|
|
|
|
return len;
|
|
|
|
} /* reply_udp */
|
|
|
|
unsigned short calc_checksum (char *data, int len)
|
|
{
|
|
unsigned short temp;
|
|
unsigned long sum=0;
|
|
int i;
|
|
|
|
for( i = 0; i <len; i+=2 ) {
|
|
memcpy(&temp,&data[i],2);
|
|
sum += (unsigned long)temp;
|
|
}
|
|
|
|
while (sum >> 16 ) {
|
|
sum = (sum & 0xffffUL) + (sum >> 16);
|
|
}
|
|
|
|
temp = (unsigned short)sum;
|
|
temp = ~temp;
|
|
|
|
if( temp == 0 )
|
|
temp = 0xffff;
|
|
|
|
return temp;
|
|
}
|
|
|
|
|
|
/*============================================================================
|
|
* Get ethernet-style interface statistics.
|
|
* Return a pointer to struct enet_statistics.
|
|
*/
|
|
static struct net_device_stats* if_stats(struct net_device* dev)
|
|
{
|
|
sdla_t *my_card;
|
|
chdlc_private_area_t* chdlc_priv_area;
|
|
|
|
if ((chdlc_priv_area=dev->priv) == NULL)
|
|
return NULL;
|
|
|
|
my_card = chdlc_priv_area->card;
|
|
return &my_card->wandev.stats;
|
|
}
|
|
|
|
|
|
/****** Cisco HDLC Firmware Interface Functions *******************************/
|
|
|
|
/*============================================================================
|
|
* Read firmware code version.
|
|
* Put code version as ASCII string in str.
|
|
*/
|
|
static int chdlc_read_version (sdla_t* card, char* str)
|
|
{
|
|
CHDLC_MAILBOX_STRUCT* mb = card->mbox;
|
|
int len;
|
|
char err;
|
|
mb->buffer_length = 0;
|
|
mb->command = READ_CHDLC_CODE_VERSION;
|
|
err = sdla_exec(mb) ? mb->return_code : CMD_TIMEOUT;
|
|
|
|
if(err != COMMAND_OK) {
|
|
chdlc_error(card,err,mb);
|
|
}
|
|
else if (str) { /* is not null */
|
|
len = mb->buffer_length;
|
|
memcpy(str, mb->data, len);
|
|
str[len] = '\0';
|
|
}
|
|
return (err);
|
|
}
|
|
|
|
/*-----------------------------------------------------------------------------
|
|
* Configure CHDLC firmware.
|
|
*/
|
|
static int chdlc_configure (sdla_t* card, void* data)
|
|
{
|
|
int err;
|
|
CHDLC_MAILBOX_STRUCT *mailbox = card->mbox;
|
|
int data_length = sizeof(CHDLC_CONFIGURATION_STRUCT);
|
|
|
|
mailbox->buffer_length = data_length;
|
|
memcpy(mailbox->data, data, data_length);
|
|
mailbox->command = SET_CHDLC_CONFIGURATION;
|
|
err = sdla_exec(mailbox) ? mailbox->return_code : CMD_TIMEOUT;
|
|
|
|
if (err != COMMAND_OK) chdlc_error (card, err, mailbox);
|
|
|
|
return err;
|
|
}
|
|
|
|
|
|
/*============================================================================
|
|
* Set interrupt mode -- HDLC Version.
|
|
*/
|
|
|
|
static int chdlc_set_intr_mode (sdla_t* card, unsigned mode)
|
|
{
|
|
CHDLC_MAILBOX_STRUCT* mb = card->mbox;
|
|
CHDLC_INT_TRIGGERS_STRUCT* int_data =
|
|
(CHDLC_INT_TRIGGERS_STRUCT *)mb->data;
|
|
int err;
|
|
|
|
int_data->CHDLC_interrupt_triggers = mode;
|
|
int_data->IRQ = card->hw.irq;
|
|
int_data->interrupt_timer = 1;
|
|
|
|
mb->buffer_length = sizeof(CHDLC_INT_TRIGGERS_STRUCT);
|
|
mb->command = SET_CHDLC_INTERRUPT_TRIGGERS;
|
|
err = sdla_exec(mb) ? mb->return_code : CMD_TIMEOUT;
|
|
if (err != COMMAND_OK)
|
|
chdlc_error (card, err, mb);
|
|
return err;
|
|
}
|
|
|
|
|
|
/*===========================================================
|
|
* 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_disable_comm_shutdown (sdla_t *card)
|
|
{
|
|
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;
|
|
err = sdla_exec(mb) ? mb->return_code : CMD_TIMEOUT;
|
|
|
|
card->u.c.comm_enabled = 0;
|
|
|
|
return 0;
|
|
}
|
|
|
|
/*============================================================================
|
|
* Enable communications.
|
|
*/
|
|
|
|
static int chdlc_comm_enable (sdla_t* card)
|
|
{
|
|
int err;
|
|
CHDLC_MAILBOX_STRUCT* mb = card->mbox;
|
|
|
|
mb->buffer_length = 0;
|
|
mb->command = ENABLE_CHDLC_COMMUNICATIONS;
|
|
err = sdla_exec(mb) ? mb->return_code : CMD_TIMEOUT;
|
|
if (err != COMMAND_OK)
|
|
chdlc_error(card, err, mb);
|
|
else
|
|
card->u.c.comm_enabled = 1;
|
|
|
|
return err;
|
|
}
|
|
|
|
/*============================================================================
|
|
* Read communication error statistics.
|
|
*/
|
|
static int chdlc_read_comm_err_stats (sdla_t* card)
|
|
{
|
|
int err;
|
|
CHDLC_MAILBOX_STRUCT* mb = card->mbox;
|
|
|
|
mb->buffer_length = 0;
|
|
mb->command = READ_COMMS_ERROR_STATS;
|
|
err = sdla_exec(mb) ? mb->return_code : CMD_TIMEOUT;
|
|
if (err != COMMAND_OK)
|
|
chdlc_error(card,err,mb);
|
|
return err;
|
|
}
|
|
|
|
|
|
/*============================================================================
|
|
* Read CHDLC operational statistics.
|
|
*/
|
|
static int chdlc_read_op_stats (sdla_t* card)
|
|
{
|
|
int err;
|
|
CHDLC_MAILBOX_STRUCT* mb = card->mbox;
|
|
|
|
mb->buffer_length = 0;
|
|
mb->command = READ_CHDLC_OPERATIONAL_STATS;
|
|
err = sdla_exec(mb) ? mb->return_code : CMD_TIMEOUT;
|
|
if (err != COMMAND_OK)
|
|
chdlc_error(card,err,mb);
|
|
return err;
|
|
}
|
|
|
|
|
|
/*============================================================================
|
|
* Update communications error and general packet statistics.
|
|
*/
|
|
static int update_comms_stats(sdla_t* card,
|
|
chdlc_private_area_t* chdlc_priv_area)
|
|
{
|
|
CHDLC_MAILBOX_STRUCT* mb = card->mbox;
|
|
COMMS_ERROR_STATS_STRUCT* err_stats;
|
|
CHDLC_OPERATIONAL_STATS_STRUCT *op_stats;
|
|
|
|
/* on the first timer interrupt, read the comms error statistics */
|
|
if(chdlc_priv_area->update_comms_stats == 2) {
|
|
if(chdlc_read_comm_err_stats(card))
|
|
return 1;
|
|
err_stats = (COMMS_ERROR_STATS_STRUCT *)mb->data;
|
|
card->wandev.stats.rx_over_errors =
|
|
err_stats->Rx_overrun_err_count;
|
|
card->wandev.stats.rx_crc_errors =
|
|
err_stats->CRC_err_count;
|
|
card->wandev.stats.rx_frame_errors =
|
|
err_stats->Rx_abort_count;
|
|
card->wandev.stats.rx_fifo_errors =
|
|
err_stats->Rx_dis_pri_bfrs_full_count;
|
|
card->wandev.stats.rx_missed_errors =
|
|
card->wandev.stats.rx_fifo_errors;
|
|
card->wandev.stats.tx_aborted_errors =
|
|
err_stats->sec_Tx_abort_count;
|
|
}
|
|
|
|
/* on the second timer interrupt, read the operational statistics */
|
|
else {
|
|
if(chdlc_read_op_stats(card))
|
|
return 1;
|
|
op_stats = (CHDLC_OPERATIONAL_STATS_STRUCT *)mb->data;
|
|
card->wandev.stats.rx_length_errors =
|
|
(op_stats->Rx_Data_discard_short_count +
|
|
op_stats->Rx_Data_discard_long_count);
|
|
}
|
|
|
|
return 0;
|
|
}
|
|
|
|
/*============================================================================
|
|
* Send packet.
|
|
* Return: 0 - o.k.
|
|
* 1 - no transmit buffers available
|
|
*/
|
|
static int chdlc_send (sdla_t* card, void* data, unsigned len)
|
|
{
|
|
CHDLC_DATA_TX_STATUS_EL_STRUCT *txbuf = card->u.c.txbuf;
|
|
|
|
if (txbuf->opp_flag)
|
|
return 1;
|
|
|
|
sdla_poke(&card->hw, txbuf->ptr_data_bfr, data, len);
|
|
|
|
txbuf->frame_length = len;
|
|
txbuf->opp_flag = 1; /* start transmission */
|
|
|
|
/* Update transmit buffer control fields */
|
|
card->u.c.txbuf = ++txbuf;
|
|
|
|
if ((void*)txbuf > card->u.c.txbuf_last)
|
|
card->u.c.txbuf = card->u.c.txbuf_base;
|
|
|
|
return 0;
|
|
}
|
|
|
|
/****** Firmware Error Handler **********************************************/
|
|
|
|
/*============================================================================
|
|
* Firmware error handler.
|
|
* This routine is called whenever firmware command returns non-zero
|
|
* return code.
|
|
*
|
|
* Return zero if previous command has to be cancelled.
|
|
*/
|
|
static int chdlc_error (sdla_t *card, int err, CHDLC_MAILBOX_STRUCT *mb)
|
|
{
|
|
unsigned cmd = mb->command;
|
|
|
|
switch (err) {
|
|
|
|
case CMD_TIMEOUT:
|
|
printk(KERN_INFO "%s: command 0x%02X timed out!\n",
|
|
card->devname, cmd);
|
|
break;
|
|
|
|
case S514_BOTH_PORTS_SAME_CLK_MODE:
|
|
if(cmd == SET_CHDLC_CONFIGURATION) {
|
|
printk(KERN_INFO
|
|
"%s: Configure both ports for the same clock source\n",
|
|
card->devname);
|
|
break;
|
|
}
|
|
|
|
default:
|
|
printk(KERN_INFO "%s: command 0x%02X returned 0x%02X!\n",
|
|
card->devname, cmd, err);
|
|
}
|
|
|
|
return 0;
|
|
}
|
|
|
|
|
|
/********** 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_work(struct net_device * 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;
|
|
dev_kfree_skb_any(skb);
|
|
chdlc_work_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_work_cleanup(dev);
|
|
}
|
|
}else{
|
|
chdlc_work_cleanup(dev);
|
|
}
|
|
}
|
|
clear_bit(0, &chan->tq_working);
|
|
|
|
return;
|
|
}
|
|
|
|
static int chdlc_work_cleanup(struct net_device *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(struct net_device *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;
|
|
dev_kfree_skb_any(skb);
|
|
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 */
|
|
|
|
|
|
/****** Interrupt Handlers **************************************************/
|
|
|
|
/*============================================================================
|
|
* Cisco HDLC interrupt service routine.
|
|
*/
|
|
static void wpc_isr (sdla_t* card)
|
|
{
|
|
struct net_device* dev;
|
|
SHARED_MEMORY_INFO_STRUCT* flags = NULL;
|
|
int i;
|
|
sdla_t *my_card;
|
|
|
|
|
|
/* Check for which port the interrupt has been generated
|
|
* Since Secondary Port is piggybacking on the Primary
|
|
* the check must be done here.
|
|
*/
|
|
|
|
flags = card->u.c.flags;
|
|
if (!flags->interrupt_info_struct.interrupt_type){
|
|
/* Check for a second port (piggybacking) */
|
|
if ((my_card = card->next)){
|
|
flags = my_card->u.c.flags;
|
|
if (flags->interrupt_info_struct.interrupt_type){
|
|
card = my_card;
|
|
card->isr(card);
|
|
return;
|
|
}
|
|
}
|
|
}
|
|
|
|
flags = card->u.c.flags;
|
|
card->in_isr = 1;
|
|
dev = card->wandev.dev;
|
|
|
|
/* 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(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 !!! */
|
|
if(card->hw.type != SDLA_S514) {
|
|
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;
|
|
}
|
|
}
|
|
|
|
switch(flags->interrupt_info_struct.interrupt_type) {
|
|
|
|
case RX_APP_INT_PEND: /* 0x01: receive interrupt */
|
|
rx_intr(card);
|
|
break;
|
|
|
|
case TX_APP_INT_PEND: /* 0x02: transmit interrupt */
|
|
flags->interrupt_info_struct.interrupt_permission &=
|
|
~APP_INT_ON_TX_FRAME;
|
|
|
|
if (card->tty_opt){
|
|
wanpipe_tty_trigger_poll(card);
|
|
break;
|
|
}
|
|
|
|
if (dev && netif_queue_stopped(dev)){
|
|
if (card->u.c.usedby == API){
|
|
netif_start_queue(dev);
|
|
wakeup_sk_bh(dev);
|
|
}else{
|
|
netif_wake_queue(dev);
|
|
}
|
|
}
|
|
break;
|
|
|
|
case COMMAND_COMPLETE_APP_INT_PEND:/* 0x04: cmd cplt */
|
|
++ Intr_test_counter;
|
|
break;
|
|
|
|
case CHDLC_EXCEP_COND_APP_INT_PEND: /* 0x20 */
|
|
process_chdlc_exception(card);
|
|
break;
|
|
|
|
case GLOBAL_EXCEP_COND_APP_INT_PEND:
|
|
process_global_exception(card);
|
|
break;
|
|
|
|
case TIMER_APP_INT_PEND:
|
|
timer_intr(card);
|
|
break;
|
|
|
|
default:
|
|
printk(KERN_INFO "%s: spurious interrupt 0x%02X!\n",
|
|
card->devname,
|
|
flags->interrupt_info_struct.interrupt_type);
|
|
printk(KERN_INFO "Code name: ");
|
|
for(i = 0; i < 4; i ++)
|
|
printk(KERN_INFO "%c",
|
|
flags->global_info_struct.codename[i]);
|
|
printk(KERN_INFO "\nCode version: ");
|
|
for(i = 0; i < 4; i ++)
|
|
printk(KERN_INFO "%c",
|
|
flags->global_info_struct.codeversion[i]);
|
|
printk(KERN_INFO "\n");
|
|
break;
|
|
}
|
|
|
|
isr_done:
|
|
|
|
card->in_isr = 0;
|
|
flags->interrupt_info_struct.interrupt_type = 0;
|
|
return;
|
|
}
|
|
|
|
/*============================================================================
|
|
* Receive interrupt handler.
|
|
*/
|
|
static void rx_intr (sdla_t* card)
|
|
{
|
|
struct net_device *dev;
|
|
chdlc_private_area_t *chdlc_priv_area;
|
|
SHARED_MEMORY_INFO_STRUCT *flags = card->u.c.flags;
|
|
CHDLC_DATA_RX_STATUS_EL_STRUCT *rxbuf = card->u.c.rxmb;
|
|
struct sk_buff *skb;
|
|
unsigned len;
|
|
unsigned addr = rxbuf->ptr_data_bfr;
|
|
void *buf;
|
|
int i,udp_type;
|
|
|
|
if (rxbuf->opp_flag != 0x01) {
|
|
printk(KERN_INFO
|
|
"%s: corrupted Rx buffer @ 0x%X, flag = 0x%02X!\n",
|
|
card->devname, (unsigned)rxbuf, rxbuf->opp_flag);
|
|
printk(KERN_INFO "Code name: ");
|
|
for(i = 0; i < 4; i ++)
|
|
printk(KERN_INFO "%c",
|
|
flags->global_info_struct.codename[i]);
|
|
printk(KERN_INFO "\nCode version: ");
|
|
for(i = 0; i < 4; i ++)
|
|
printk(KERN_INFO "%c",
|
|
flags->global_info_struct.codeversion[i]);
|
|
printk(KERN_INFO "\n");
|
|
|
|
|
|
/* Bug Fix: Mar 6 2000
|
|
* If we get a corrupted mailbox, it measn that driver
|
|
* is out of sync with the firmware. There is no recovery.
|
|
* If we don't turn off all interrupts for this card
|
|
* the machine will crash.
|
|
*/
|
|
printk(KERN_INFO "%s: Critical router failure ...!!!\n", card->devname);
|
|
printk(KERN_INFO "Please contact Sangoma Technologies !\n");
|
|
chdlc_set_intr_mode(card,0);
|
|
return;
|
|
}
|
|
|
|
len = rxbuf->frame_length;
|
|
|
|
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;
|
|
}
|
|
|
|
dev = card->wandev.dev;
|
|
|
|
if (!dev){
|
|
goto rx_exit;
|
|
}
|
|
|
|
if (!netif_running(dev))
|
|
goto rx_exit;
|
|
|
|
chdlc_priv_area = dev->priv;
|
|
|
|
|
|
/* Allocate socket buffer */
|
|
skb = dev_alloc_skb(len);
|
|
|
|
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);
|
|
|
|
skb->protocol = htons(ETH_P_IP);
|
|
|
|
card->wandev.stats.rx_packets ++;
|
|
card->wandev.stats.rx_bytes += skb->len;
|
|
udp_type = udp_pkt_type( skb, card );
|
|
|
|
if(udp_type == UDP_CPIPE_TYPE) {
|
|
if(store_udp_mgmt_pkt(UDP_PKT_FRM_NETWORK,
|
|
card, skb, dev, chdlc_priv_area)) {
|
|
flags->interrupt_info_struct.
|
|
interrupt_permission |=
|
|
APP_INT_ON_TIMER;
|
|
}
|
|
} else 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(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_work(&chdlc_priv_area->common.wanpipe_work);
|
|
}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);
|
|
dev->last_rx = jiffies;
|
|
}
|
|
|
|
rx_exit:
|
|
/* Release buffer element and calculate a pointer to the next one */
|
|
rxbuf->opp_flag = 0x00;
|
|
card->u.c.rxmb = ++ rxbuf;
|
|
if((void*)rxbuf > card->u.c.rxbuf_last){
|
|
card->u.c.rxmb = card->u.c.rxbuf_base;
|
|
}
|
|
}
|
|
|
|
/*============================================================================
|
|
* Timer interrupt handler.
|
|
* The timer interrupt is used for two purposes:
|
|
* 1) Processing udp calls from 'cpipemon'.
|
|
* 2) Reading board-level statistics for updating the proc file system.
|
|
*/
|
|
void timer_intr(sdla_t *card)
|
|
{
|
|
struct net_device* dev;
|
|
chdlc_private_area_t* chdlc_priv_area = NULL;
|
|
SHARED_MEMORY_INFO_STRUCT* flags = NULL;
|
|
|
|
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,
|
|
chdlc_priv_area);
|
|
chdlc_priv_area->timer_int_enabled &= ~TMR_INT_ENABLED_UDP;
|
|
}
|
|
|
|
/* read the communications statistics if required */
|
|
if(chdlc_priv_area->timer_int_enabled & TMR_INT_ENABLED_UPDATE) {
|
|
update_comms_stats(card, chdlc_priv_area);
|
|
if(!(-- chdlc_priv_area->update_comms_stats)) {
|
|
chdlc_priv_area->timer_int_enabled &=
|
|
~TMR_INT_ENABLED_UPDATE;
|
|
}
|
|
}
|
|
|
|
/* only disable the timer interrupt if there are no udp or statistic */
|
|
/* updates pending */
|
|
if(!chdlc_priv_area->timer_int_enabled) {
|
|
flags = card->u.c.flags;
|
|
flags->interrupt_info_struct.interrupt_permission &=
|
|
~APP_INT_ON_TIMER;
|
|
}
|
|
}
|
|
|
|
/*------------------------------------------------------------------------------
|
|
Miscellaneous Functions
|
|
- set_chdlc_config() used to set configuration options on the board
|
|
------------------------------------------------------------------------------*/
|
|
|
|
static int set_chdlc_config(sdla_t* card)
|
|
{
|
|
CHDLC_CONFIGURATION_STRUCT cfg;
|
|
|
|
memset(&cfg, 0, sizeof(CHDLC_CONFIGURATION_STRUCT));
|
|
|
|
if(card->wandev.clocking){
|
|
cfg.baud_rate = card->wandev.bps;
|
|
}
|
|
|
|
cfg.line_config_options = (card->wandev.interface == WANOPT_RS232) ?
|
|
INTERFACE_LEVEL_RS232 : INTERFACE_LEVEL_V35;
|
|
|
|
cfg.modem_config_options = 0;
|
|
cfg.modem_status_timer = 100;
|
|
|
|
cfg.CHDLC_protocol_options = card->u.c.protocol_options;
|
|
|
|
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;
|
|
cfg.keepalive_error_tolerance = card->u.c.kpalv_err;
|
|
cfg.SLARP_request_timer = card->u.c.slarp_timer;
|
|
|
|
if (cfg.SLARP_request_timer) {
|
|
cfg.IP_address = 0;
|
|
cfg.IP_netmask = 0;
|
|
|
|
}else if (card->wandev.dev){
|
|
struct net_device *dev = card->wandev.dev;
|
|
chdlc_private_area_t *chdlc_priv_area = dev->priv;
|
|
|
|
struct in_device *in_dev = dev->ip_ptr;
|
|
|
|
if(in_dev != NULL) {
|
|
struct in_ifaddr *ifa = in_dev->ifa_list;
|
|
|
|
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);
|
|
}
|
|
}
|
|
|
|
/* FIXME: We must re-think this message in next release
|
|
if((cfg.IP_address & 0x000000FF) > 2) {
|
|
printk(KERN_WARNING "\n");
|
|
printk(KERN_WARNING " WARNING:%s configured with an\n",
|
|
card->devname);
|
|
printk(KERN_WARNING " invalid local IP address.\n");
|
|
printk(KERN_WARNING " Slarp pragmatics will fail.\n");
|
|
printk(KERN_WARNING " IP address should be of the\n");
|
|
printk(KERN_WARNING " format A.B.C.1 or A.B.C.2.\n");
|
|
}
|
|
*/
|
|
}
|
|
|
|
return chdlc_configure(card, &cfg);
|
|
}
|
|
|
|
|
|
/*-----------------------------------------------------------------------------
|
|
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
|
|
*/
|
|
static int process_global_exception(sdla_t *card)
|
|
{
|
|
CHDLC_MAILBOX_STRUCT* mbox = card->mbox;
|
|
int err;
|
|
|
|
mbox->buffer_length = 0;
|
|
mbox->command = READ_GLOBAL_EXCEPTION_CONDITION;
|
|
err = sdla_exec(mbox) ? mbox->return_code : CMD_TIMEOUT;
|
|
|
|
if(err != CMD_TIMEOUT ){
|
|
|
|
switch(mbox->return_code) {
|
|
|
|
case EXCEP_MODEM_STATUS_CHANGE:
|
|
|
|
printk(KERN_INFO "%s: Modem status change\n",
|
|
card->devname);
|
|
|
|
switch(mbox->data[0] & (DCD_HIGH | CTS_HIGH)) {
|
|
case (DCD_HIGH):
|
|
printk(KERN_INFO "%s: DCD high, CTS low\n",card->devname);
|
|
break;
|
|
case (CTS_HIGH):
|
|
printk(KERN_INFO "%s: DCD low, CTS high\n",card->devname);
|
|
break;
|
|
case ((DCD_HIGH | CTS_HIGH)):
|
|
printk(KERN_INFO "%s: DCD high, CTS high\n",card->devname);
|
|
break;
|
|
default:
|
|
printk(KERN_INFO "%s: DCD low, CTS low\n",card->devname);
|
|
break;
|
|
}
|
|
break;
|
|
|
|
case EXCEP_TRC_DISABLED:
|
|
printk(KERN_INFO "%s: Line trace disabled\n",
|
|
card->devname);
|
|
break;
|
|
|
|
case EXCEP_IRQ_TIMEOUT:
|
|
printk(KERN_INFO "%s: IRQ timeout occurred\n",
|
|
card->devname);
|
|
break;
|
|
|
|
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);
|
|
break;
|
|
}
|
|
}
|
|
return 0;
|
|
}
|
|
|
|
|
|
/*============================================================================
|
|
* Process chdlc exception condition
|
|
*/
|
|
static int process_chdlc_exception(sdla_t *card)
|
|
{
|
|
CHDLC_MAILBOX_STRUCT* mb = card->mbox;
|
|
int err;
|
|
|
|
mb->buffer_length = 0;
|
|
mb->command = READ_CHDLC_EXCEPTION_CONDITION;
|
|
err = sdla_exec(mb) ? mb->return_code : CMD_TIMEOUT;
|
|
if(err != CMD_TIMEOUT) {
|
|
|
|
switch (err) {
|
|
|
|
case EXCEP_LINK_ACTIVE:
|
|
port_set_state(card, WAN_CONNECTED);
|
|
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:
|
|
port_set_state(card, WAN_DISCONNECTED);
|
|
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:
|
|
if (configure_ip(card))
|
|
return -1;
|
|
break;
|
|
|
|
case EXCEP_LOOPBACK_CONDITION:
|
|
printk(KERN_INFO "%s: Loopback Condition Detected.\n",
|
|
card->devname);
|
|
break;
|
|
|
|
case NO_CHDLC_EXCEP_COND_TO_REPORT:
|
|
printk(KERN_INFO "%s: No exceptions reported.\n",
|
|
card->devname);
|
|
break;
|
|
}
|
|
|
|
}
|
|
return 0;
|
|
}
|
|
|
|
|
|
/*============================================================================
|
|
* Configure IP from SLARP negotiation
|
|
* This adds dynamic routes when SLARP has provided valid addresses
|
|
*/
|
|
|
|
static int configure_ip (sdla_t* card)
|
|
{
|
|
struct net_device *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;
|
|
CHDLC_CONFIGURATION_STRUCT *cfg;
|
|
|
|
mb->buffer_length = 0;
|
|
mb->command = READ_CHDLC_CONFIGURATION;
|
|
err = sdla_exec(mb) ? mb->return_code : CMD_TIMEOUT;
|
|
|
|
if(err != COMMAND_OK) {
|
|
chdlc_error(card,err,mb);
|
|
return -1;
|
|
}
|
|
|
|
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;
|
|
|
|
/* 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;
|
|
}
|
|
|
|
|
|
/*============================================================================
|
|
* Un-Configure IP negotiated by SLARP
|
|
* This removes dynamic routes when the link becomes inactive.
|
|
*/
|
|
|
|
static int unconfigure_ip (sdla_t* card)
|
|
{
|
|
struct net_device *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) {
|
|
|
|
/* 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.
|
|
*/
|
|
chdlc_priv_area->route_status = REMOVE_ROUTE;
|
|
|
|
}
|
|
return 0;
|
|
}
|
|
|
|
/*============================================================================
|
|
* Routine to add/remove routes
|
|
* Called like a polling routine when Routes are flagged to be added/removed.
|
|
*/
|
|
|
|
static void process_route (sdla_t *card)
|
|
{
|
|
struct net_device *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;
|
|
struct in_device *in_dev;
|
|
mm_segment_t fs;
|
|
struct ifreq if_info;
|
|
struct sockaddr_in *if_data1, *if_data2;
|
|
|
|
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 & ~chdlc_priv_area->IP_netmask) > 2)) {
|
|
|
|
printk(KERN_INFO "%s: Dynamic route failure.\n",card->devname);
|
|
|
|
if(card->u.c.slarp_timer) {
|
|
u32 addr_net = htonl(chdlc_priv_area->IP_address);
|
|
|
|
printk(KERN_INFO "%s: Bad IP address %u.%u.%u.%u received\n",
|
|
card->devname,
|
|
NIPQUAD(addr_net));
|
|
printk(KERN_INFO "%s: from remote station.\n",
|
|
card->devname);
|
|
|
|
}else{
|
|
u32 addr_net = htonl(chdlc_priv_area->IP_address);
|
|
|
|
printk(KERN_INFO "%s: Bad IP address %u.%u.%u.%u issued\n",
|
|
card->devname,
|
|
NIPQUAD(addr_net));
|
|
printk(KERN_INFO "%s: to remote station. Local\n",
|
|
card->devname);
|
|
printk(KERN_INFO "%s: IP address must be A.B.C.1\n",
|
|
card->devname);
|
|
printk(KERN_INFO "%s: or A.B.C.2.\n",card->devname);
|
|
}
|
|
|
|
/* remove the route due to the IP address error condition */
|
|
chdlc_priv_area->route_status = REMOVE_ROUTE;
|
|
err = 1;
|
|
}
|
|
|
|
/* If we are removing a route with bad IP addressing, then use the */
|
|
/* locally configured IP addresses */
|
|
if((chdlc_priv_area->route_status == REMOVE_ROUTE) && err) {
|
|
|
|
/* do not remove a bad route that has already been removed */
|
|
if(chdlc_priv_area->route_removed) {
|
|
return;
|
|
}
|
|
|
|
in_dev = dev->ip_ptr;
|
|
|
|
if(in_dev != NULL) {
|
|
struct in_ifaddr *ifa = in_dev->ifa_list;
|
|
if (ifa != NULL ) {
|
|
local_IP_addr = ifa->ifa_local;
|
|
IP_netmask = ifa->ifa_mask;
|
|
}
|
|
}
|
|
}else{
|
|
/* According to Cisco HDLC, if the point-to-point address is
|
|
A.B.C.1, then we are the opposite (A.B.C.2), and vice-versa.
|
|
*/
|
|
IP_netmask = ntohl(chdlc_priv_area->IP_netmask);
|
|
remote_IP_addr = ntohl(chdlc_priv_area->IP_address);
|
|
|
|
|
|
/* 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) {
|
|
IP_addr = local_IP_addr;
|
|
local_IP_addr = remote_IP_addr;
|
|
remote_IP_addr = IP_addr;
|
|
}
|
|
}
|
|
|
|
fs = get_fs(); /* Save file system */
|
|
set_fs(get_ds()); /* Get user space block */
|
|
|
|
/* Setup a structure for adding/removing routes */
|
|
memset(&if_info, 0, sizeof(if_info));
|
|
strcpy(if_info.ifr_name, dev->name);
|
|
|
|
switch (chdlc_priv_area->route_status) {
|
|
|
|
case ADD_ROUTE:
|
|
|
|
if(!card->u.c.slarp_timer) {
|
|
if_data2 = (struct sockaddr_in *)&if_info.ifr_dstaddr;
|
|
if_data2->sin_addr.s_addr = remote_IP_addr;
|
|
if_data2->sin_family = AF_INET;
|
|
err = devinet_ioctl(SIOCSIFDSTADDR, &if_info);
|
|
} else {
|
|
if_data1 = (struct sockaddr_in *)&if_info.ifr_addr;
|
|
if_data1->sin_addr.s_addr = local_IP_addr;
|
|
if_data1->sin_family = AF_INET;
|
|
if(!(err = devinet_ioctl(SIOCSIFADDR, &if_info))){
|
|
if_data2 = (struct sockaddr_in *)&if_info.ifr_dstaddr;
|
|
if_data2->sin_addr.s_addr = remote_IP_addr;
|
|
if_data2->sin_family = AF_INET;
|
|
err = devinet_ioctl(SIOCSIFDSTADDR, &if_info);
|
|
}
|
|
}
|
|
|
|
if(err) {
|
|
printk(KERN_INFO "%s: Add route %u.%u.%u.%u failed (%d)\n",
|
|
card->devname, NIPQUAD(remote_IP_addr), err);
|
|
} else {
|
|
((chdlc_private_area_t *)dev->priv)->route_status = ROUTE_ADDED;
|
|
printk(KERN_INFO "%s: Dynamic route added.\n",
|
|
card->devname);
|
|
printk(KERN_INFO "%s: Local IP addr : %u.%u.%u.%u\n",
|
|
card->devname, NIPQUAD(local_IP_addr));
|
|
printk(KERN_INFO "%s: Remote IP addr: %u.%u.%u.%u\n",
|
|
card->devname, NIPQUAD(remote_IP_addr));
|
|
chdlc_priv_area->route_removed = 0;
|
|
}
|
|
break;
|
|
|
|
|
|
case REMOVE_ROUTE:
|
|
|
|
/* Change the local ip address of the interface to 0.
|
|
* This will also delete the destination route.
|
|
*/
|
|
if(!card->u.c.slarp_timer) {
|
|
if_data2 = (struct sockaddr_in *)&if_info.ifr_dstaddr;
|
|
if_data2->sin_addr.s_addr = 0;
|
|
if_data2->sin_family = AF_INET;
|
|
err = devinet_ioctl(SIOCSIFDSTADDR, &if_info);
|
|
} else {
|
|
if_data1 = (struct sockaddr_in *)&if_info.ifr_addr;
|
|
if_data1->sin_addr.s_addr = 0;
|
|
if_data1->sin_family = AF_INET;
|
|
err = devinet_ioctl(SIOCSIFADDR,&if_info);
|
|
|
|
}
|
|
if(err) {
|
|
printk(KERN_INFO
|
|
"%s: Remove route %u.%u.%u.%u failed, (err %d)\n",
|
|
card->devname, NIPQUAD(remote_IP_addr),
|
|
err);
|
|
} else {
|
|
((chdlc_private_area_t *)dev->priv)->route_status =
|
|
NO_ROUTE;
|
|
printk(KERN_INFO "%s: Dynamic route removed: %u.%u.%u.%u\n",
|
|
card->devname, NIPQUAD(local_IP_addr));
|
|
chdlc_priv_area->route_removed = 1;
|
|
}
|
|
break;
|
|
}
|
|
|
|
set_fs(fs); /* Restore file system */
|
|
|
|
}
|
|
|
|
|
|
/*=============================================================================
|
|
* Store a UDP management packet for later processing.
|
|
*/
|
|
|
|
static int store_udp_mgmt_pkt(char udp_pkt_src, sdla_t* card,
|
|
struct sk_buff *skb, struct net_device* dev,
|
|
chdlc_private_area_t* chdlc_priv_area)
|
|
{
|
|
int udp_pkt_stored = 0;
|
|
|
|
if(!chdlc_priv_area->udp_pkt_lgth &&
|
|
(skb->len <= MAX_LGTH_UDP_MGNT_PKT)) {
|
|
chdlc_priv_area->udp_pkt_lgth = skb->len;
|
|
chdlc_priv_area->udp_pkt_src = udp_pkt_src;
|
|
memcpy(chdlc_priv_area->udp_pkt_data, skb->data, skb->len);
|
|
chdlc_priv_area->timer_int_enabled = TMR_INT_ENABLED_UDP;
|
|
udp_pkt_stored = 1;
|
|
}
|
|
|
|
if(udp_pkt_src == UDP_PKT_FRM_STACK){
|
|
dev_kfree_skb_any(skb);
|
|
}else{
|
|
dev_kfree_skb_any(skb);
|
|
}
|
|
|
|
return(udp_pkt_stored);
|
|
}
|
|
|
|
|
|
/*=============================================================================
|
|
* Process UDP management packet.
|
|
*/
|
|
|
|
static int process_udp_mgmt_pkt(sdla_t* card, struct net_device* dev,
|
|
chdlc_private_area_t* chdlc_priv_area )
|
|
{
|
|
unsigned char *buf;
|
|
unsigned int frames, len;
|
|
struct sk_buff *new_skb;
|
|
unsigned short buffer_length, real_len;
|
|
unsigned long data_ptr;
|
|
unsigned data_length;
|
|
int udp_mgmt_req_valid = 1;
|
|
CHDLC_MAILBOX_STRUCT *mb = card->mbox;
|
|
SHARED_MEMORY_INFO_STRUCT *flags = card->u.c.flags;
|
|
chdlc_udp_pkt_t *chdlc_udp_pkt;
|
|
struct timeval tv;
|
|
int err;
|
|
char ut_char;
|
|
|
|
chdlc_udp_pkt = (chdlc_udp_pkt_t *) chdlc_priv_area->udp_pkt_data;
|
|
|
|
if(chdlc_priv_area->udp_pkt_src == UDP_PKT_FRM_NETWORK){
|
|
|
|
/* 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) {
|
|
|
|
/* set length to 0 */
|
|
chdlc_udp_pkt->cblock.buffer_length = 0;
|
|
|
|
/* set return code */
|
|
chdlc_udp_pkt->cblock.return_code = 0xCD;
|
|
|
|
if (net_ratelimit()){
|
|
printk(KERN_INFO
|
|
"%s: Warning, Illegal UDP command attempted from network: %x\n",
|
|
card->devname,chdlc_udp_pkt->cblock.command);
|
|
}
|
|
|
|
} else {
|
|
unsigned long trace_status_cfg_addr = 0;
|
|
TRACE_STATUS_EL_CFG_STRUCT trace_cfg_struct;
|
|
TRACE_STATUS_ELEMENT_STRUCT trace_element_struct;
|
|
|
|
switch(chdlc_udp_pkt->cblock.command) {
|
|
|
|
case CPIPE_ENABLE_TRACING:
|
|
if (!chdlc_priv_area->TracingEnabled) {
|
|
|
|
/* OPERATE_DATALINE_MONITOR */
|
|
|
|
mb->buffer_length = sizeof(LINE_TRACE_CONFIG_STRUCT);
|
|
mb->command = SET_TRACE_CONFIGURATION;
|
|
|
|
((LINE_TRACE_CONFIG_STRUCT *)mb->data)->
|
|
trace_config = TRACE_ACTIVE;
|
|
/* Trace delay mode is not used because it slows
|
|
down transfer and results in a standoff situation
|
|
when there is a lot of data */
|
|
|
|
/* Configure the Trace based on user inputs */
|
|
((LINE_TRACE_CONFIG_STRUCT *)mb->data)->trace_config |=
|
|
chdlc_udp_pkt->data[0];
|
|
|
|
((LINE_TRACE_CONFIG_STRUCT *)mb->data)->
|
|
trace_deactivation_timer = 4000;
|
|
|
|
|
|
err = sdla_exec(mb) ? mb->return_code : CMD_TIMEOUT;
|
|
if (err != COMMAND_OK) {
|
|
chdlc_error(card,err,mb);
|
|
card->TracingEnabled = 0;
|
|
chdlc_udp_pkt->cblock.return_code = err;
|
|
mb->buffer_length = 0;
|
|
break;
|
|
}
|
|
|
|
/* Get the base address of the trace element list */
|
|
mb->buffer_length = 0;
|
|
mb->command = READ_TRACE_CONFIGURATION;
|
|
err = sdla_exec(mb) ? mb->return_code : CMD_TIMEOUT;
|
|
|
|
if (err != COMMAND_OK) {
|
|
chdlc_error(card,err,mb);
|
|
chdlc_priv_area->TracingEnabled = 0;
|
|
chdlc_udp_pkt->cblock.return_code = err;
|
|
mb->buffer_length = 0;
|
|
break;
|
|
}
|
|
|
|
trace_status_cfg_addr =((LINE_TRACE_CONFIG_STRUCT *)
|
|
mb->data) -> ptr_trace_stat_el_cfg_struct;
|
|
|
|
sdla_peek(&card->hw, trace_status_cfg_addr,
|
|
&trace_cfg_struct, sizeof(trace_cfg_struct));
|
|
|
|
chdlc_priv_area->start_trace_addr = trace_cfg_struct.
|
|
base_addr_trace_status_elements;
|
|
|
|
chdlc_priv_area->number_trace_elements =
|
|
trace_cfg_struct.number_trace_status_elements;
|
|
|
|
chdlc_priv_area->end_trace_addr = (unsigned long)
|
|
((TRACE_STATUS_ELEMENT_STRUCT *)
|
|
chdlc_priv_area->start_trace_addr +
|
|
(chdlc_priv_area->number_trace_elements - 1));
|
|
|
|
chdlc_priv_area->base_addr_trace_buffer =
|
|
trace_cfg_struct.base_addr_trace_buffer;
|
|
|
|
chdlc_priv_area->end_addr_trace_buffer =
|
|
trace_cfg_struct.end_addr_trace_buffer;
|
|
|
|
chdlc_priv_area->curr_trace_addr =
|
|
trace_cfg_struct.next_trace_element_to_use;
|
|
|
|
chdlc_priv_area->available_buffer_space = 2000 -
|
|
sizeof(ip_pkt_t) -
|
|
sizeof(udp_pkt_t) -
|
|
sizeof(wp_mgmt_t) -
|
|
sizeof(cblock_t) -
|
|
sizeof(trace_info_t);
|
|
}
|
|
chdlc_udp_pkt->cblock.return_code = COMMAND_OK;
|
|
mb->buffer_length = 0;
|
|
chdlc_priv_area->TracingEnabled = 1;
|
|
break;
|
|
|
|
|
|
case CPIPE_DISABLE_TRACING:
|
|
if (chdlc_priv_area->TracingEnabled) {
|
|
|
|
/* OPERATE_DATALINE_MONITOR */
|
|
mb->buffer_length = sizeof(LINE_TRACE_CONFIG_STRUCT);
|
|
mb->command = SET_TRACE_CONFIGURATION;
|
|
((LINE_TRACE_CONFIG_STRUCT *)mb->data)->
|
|
trace_config = TRACE_INACTIVE;
|
|
err = sdla_exec(mb) ? mb->return_code : CMD_TIMEOUT;
|
|
}
|
|
|
|
chdlc_priv_area->TracingEnabled = 0;
|
|
chdlc_udp_pkt->cblock.return_code = COMMAND_OK;
|
|
mb->buffer_length = 0;
|
|
break;
|
|
|
|
|
|
case CPIPE_GET_TRACE_INFO:
|
|
|
|
if (!chdlc_priv_area->TracingEnabled) {
|
|
chdlc_udp_pkt->cblock.return_code = 1;
|
|
mb->buffer_length = 0;
|
|
break;
|
|
}
|
|
|
|
chdlc_udp_pkt->trace_info.ismoredata = 0x00;
|
|
buffer_length = 0; /* offset of packet already occupied */
|
|
|
|
for (frames=0; frames < chdlc_priv_area->number_trace_elements; frames++){
|
|
|
|
trace_pkt_t *trace_pkt = (trace_pkt_t *)
|
|
&chdlc_udp_pkt->data[buffer_length];
|
|
|
|
sdla_peek(&card->hw, chdlc_priv_area->curr_trace_addr,
|
|
(unsigned char *)&trace_element_struct,
|
|
sizeof(TRACE_STATUS_ELEMENT_STRUCT));
|
|
|
|
if (trace_element_struct.opp_flag == 0x00) {
|
|
break;
|
|
}
|
|
|
|
/* get pointer to real data */
|
|
data_ptr = trace_element_struct.ptr_data_bfr;
|
|
|
|
/* See if there is actual data on the trace buffer */
|
|
if (data_ptr){
|
|
data_length = trace_element_struct.trace_length;
|
|
}else{
|
|
data_length = 0;
|
|
chdlc_udp_pkt->trace_info.ismoredata = 0x01;
|
|
}
|
|
|
|
if( (chdlc_priv_area->available_buffer_space - buffer_length)
|
|
< ( sizeof(trace_pkt_t) + data_length) ) {
|
|
|
|
/* indicate there are more frames on board & exit */
|
|
chdlc_udp_pkt->trace_info.ismoredata = 0x01;
|
|
break;
|
|
}
|
|
|
|
trace_pkt->status = trace_element_struct.trace_type;
|
|
|
|
trace_pkt->time_stamp =
|
|
trace_element_struct.trace_time_stamp;
|
|
|
|
trace_pkt->real_length =
|
|
trace_element_struct.trace_length;
|
|
|
|
/* see if we can fit the frame into the user buffer */
|
|
real_len = trace_pkt->real_length;
|
|
|
|
if (data_ptr == 0) {
|
|
trace_pkt->data_avail = 0x00;
|
|
} else {
|
|
unsigned tmp = 0;
|
|
|
|
/* get the data from circular buffer
|
|
must check for end of buffer */
|
|
trace_pkt->data_avail = 0x01;
|
|
|
|
if ((data_ptr + real_len) >
|
|
chdlc_priv_area->end_addr_trace_buffer + 1){
|
|
|
|
tmp = chdlc_priv_area->end_addr_trace_buffer - data_ptr + 1;
|
|
sdla_peek(&card->hw, data_ptr,
|
|
trace_pkt->data,tmp);
|
|
data_ptr = chdlc_priv_area->base_addr_trace_buffer;
|
|
}
|
|
|
|
sdla_peek(&card->hw, data_ptr,
|
|
&trace_pkt->data[tmp], real_len - tmp);
|
|
}
|
|
|
|
/* zero the opp flag to show we got the frame */
|
|
ut_char = 0x00;
|
|
sdla_poke(&card->hw, chdlc_priv_area->curr_trace_addr, &ut_char, 1);
|
|
|
|
/* now move onto the next frame */
|
|
chdlc_priv_area->curr_trace_addr += sizeof(TRACE_STATUS_ELEMENT_STRUCT);
|
|
|
|
/* check if we went over the last address */
|
|
if ( chdlc_priv_area->curr_trace_addr > chdlc_priv_area->end_trace_addr ) {
|
|
chdlc_priv_area->curr_trace_addr = chdlc_priv_area->start_trace_addr;
|
|
}
|
|
|
|
if(trace_pkt->data_avail == 0x01) {
|
|
buffer_length += real_len - 1;
|
|
}
|
|
|
|
/* for the header */
|
|
buffer_length += sizeof(trace_pkt_t);
|
|
|
|
} /* For Loop */
|
|
|
|
if (frames == chdlc_priv_area->number_trace_elements){
|
|
chdlc_udp_pkt->trace_info.ismoredata = 0x01;
|
|
}
|
|
chdlc_udp_pkt->trace_info.num_frames = frames;
|
|
|
|
mb->buffer_length = buffer_length;
|
|
chdlc_udp_pkt->cblock.buffer_length = buffer_length;
|
|
|
|
chdlc_udp_pkt->cblock.return_code = COMMAND_OK;
|
|
|
|
break;
|
|
|
|
|
|
case CPIPE_FT1_READ_STATUS:
|
|
((unsigned char *)chdlc_udp_pkt->data )[0] =
|
|
flags->FT1_info_struct.parallel_port_A_input;
|
|
|
|
((unsigned char *)chdlc_udp_pkt->data )[1] =
|
|
flags->FT1_info_struct.parallel_port_B_input;
|
|
|
|
chdlc_udp_pkt->cblock.return_code = COMMAND_OK;
|
|
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 -
|
|
chdlc_priv_area->router_start_time;
|
|
*(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:
|
|
/* Enable FT1 MONITOR STATUS */
|
|
if ((chdlc_udp_pkt->data[0] & ENABLE_READ_FT1_STATUS) ||
|
|
(chdlc_udp_pkt->data[0] & ENABLE_READ_FT1_OP_STATS)) {
|
|
|
|
if( rCount++ != 0 ) {
|
|
chdlc_udp_pkt->cblock.
|
|
return_code = COMMAND_OK;
|
|
mb->buffer_length = 1;
|
|
break;
|
|
}
|
|
}
|
|
|
|
/* Disable FT1 MONITOR STATUS */
|
|
if( chdlc_udp_pkt->data[0] == 0) {
|
|
|
|
if( --rCount != 0) {
|
|
chdlc_udp_pkt->cblock.
|
|
return_code = COMMAND_OK;
|
|
mb->buffer_length = 1;
|
|
break;
|
|
}
|
|
}
|
|
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;
|
|
if (mb->buffer_length) {
|
|
memcpy(&mb->data, (unsigned char *) chdlc_udp_pkt->
|
|
data, mb->buffer_length);
|
|
}
|
|
/* run the command on the board */
|
|
err = sdla_exec(mb) ? mb->return_code : CMD_TIMEOUT;
|
|
if (err != COMMAND_OK) {
|
|
break;
|
|
}
|
|
|
|
/* copy the result back to our buffer */
|
|
memcpy(&chdlc_udp_pkt->cblock, mb, sizeof(cblock_t));
|
|
|
|
if (mb->buffer_length) {
|
|
memcpy(&chdlc_udp_pkt->data, &mb->data,
|
|
mb->buffer_length);
|
|
}
|
|
|
|
} /* end of switch */
|
|
} /* end of else */
|
|
|
|
/* Fill UDP TTL */
|
|
chdlc_udp_pkt->ip_pkt.ttl = card->wandev.ttl;
|
|
|
|
len = reply_udp(chdlc_priv_area->udp_pkt_data, mb->buffer_length);
|
|
|
|
|
|
if(chdlc_priv_area->udp_pkt_src == UDP_PKT_FRM_NETWORK){
|
|
|
|
/* 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;
|
|
card->wandev.stats.tx_bytes += len;
|
|
}
|
|
}
|
|
} else {
|
|
|
|
/* Pass it up the stack
|
|
Allocate socket buffer */
|
|
if ((new_skb = dev_alloc_skb(len)) != NULL) {
|
|
/* copy data into new_skb */
|
|
|
|
buf = skb_put(new_skb, len);
|
|
memcpy(buf, chdlc_priv_area->udp_pkt_data, len);
|
|
|
|
/* Decapsulate pkt and pass it up the protocol stack */
|
|
new_skb->protocol = htons(ETH_P_IP);
|
|
new_skb->dev = dev;
|
|
new_skb->mac.raw = new_skb->data;
|
|
|
|
netif_rx(new_skb);
|
|
dev->last_rx = jiffies;
|
|
} else {
|
|
|
|
printk(KERN_INFO "%s: no socket buffers available!\n",
|
|
card->devname);
|
|
}
|
|
}
|
|
|
|
chdlc_priv_area->udp_pkt_lgth = 0;
|
|
|
|
return 0;
|
|
}
|
|
|
|
/*============================================================================
|
|
* Initialize Receive and Transmit Buffers.
|
|
*/
|
|
|
|
static void init_chdlc_tx_rx_buff( sdla_t* card)
|
|
{
|
|
CHDLC_MAILBOX_STRUCT* mb = card->mbox;
|
|
CHDLC_TX_STATUS_EL_CFG_STRUCT *tx_config;
|
|
CHDLC_RX_STATUS_EL_CFG_STRUCT *rx_config;
|
|
char err;
|
|
|
|
mb->buffer_length = 0;
|
|
mb->command = READ_CHDLC_CONFIGURATION;
|
|
err = sdla_exec(mb) ? mb->return_code : CMD_TIMEOUT;
|
|
|
|
if(err != COMMAND_OK) {
|
|
if (card->wandev.dev){
|
|
chdlc_error(card,err,mb);
|
|
}
|
|
return;
|
|
}
|
|
|
|
if(card->hw.type == SDLA_S514) {
|
|
tx_config = (CHDLC_TX_STATUS_EL_CFG_STRUCT *)(card->hw.dpmbase +
|
|
(((CHDLC_CONFIGURATION_STRUCT *)mb->data)->
|
|
ptr_CHDLC_Tx_stat_el_cfg_struct));
|
|
rx_config = (CHDLC_RX_STATUS_EL_CFG_STRUCT *)(card->hw.dpmbase +
|
|
(((CHDLC_CONFIGURATION_STRUCT *)mb->data)->
|
|
ptr_CHDLC_Rx_stat_el_cfg_struct));
|
|
|
|
/* Setup Head and Tails for buffers */
|
|
card->u.c.txbuf_base = (void *)(card->hw.dpmbase +
|
|
tx_config->base_addr_Tx_status_elements);
|
|
card->u.c.txbuf_last =
|
|
(CHDLC_DATA_TX_STATUS_EL_STRUCT *)
|
|
card->u.c.txbuf_base +
|
|
(tx_config->number_Tx_status_elements - 1);
|
|
|
|
card->u.c.rxbuf_base = (void *)(card->hw.dpmbase +
|
|
rx_config->base_addr_Rx_status_elements);
|
|
card->u.c.rxbuf_last =
|
|
(CHDLC_DATA_RX_STATUS_EL_STRUCT *)
|
|
card->u.c.rxbuf_base +
|
|
(rx_config->number_Rx_status_elements - 1);
|
|
|
|
/* Set up next pointer to be used */
|
|
card->u.c.txbuf = (void *)(card->hw.dpmbase +
|
|
tx_config->next_Tx_status_element_to_use);
|
|
card->u.c.rxmb = (void *)(card->hw.dpmbase +
|
|
rx_config->next_Rx_status_element_to_use);
|
|
}
|
|
else {
|
|
tx_config = (CHDLC_TX_STATUS_EL_CFG_STRUCT *)(card->hw.dpmbase +
|
|
(((CHDLC_CONFIGURATION_STRUCT *)mb->data)->
|
|
ptr_CHDLC_Tx_stat_el_cfg_struct % SDLA_WINDOWSIZE));
|
|
|
|
rx_config = (CHDLC_RX_STATUS_EL_CFG_STRUCT *)(card->hw.dpmbase +
|
|
(((CHDLC_CONFIGURATION_STRUCT *)mb->data)->
|
|
ptr_CHDLC_Rx_stat_el_cfg_struct % SDLA_WINDOWSIZE));
|
|
|
|
/* Setup Head and Tails for buffers */
|
|
card->u.c.txbuf_base = (void *)(card->hw.dpmbase +
|
|
(tx_config->base_addr_Tx_status_elements % SDLA_WINDOWSIZE));
|
|
card->u.c.txbuf_last =
|
|
(CHDLC_DATA_TX_STATUS_EL_STRUCT *)card->u.c.txbuf_base
|
|
+ (tx_config->number_Tx_status_elements - 1);
|
|
card->u.c.rxbuf_base = (void *)(card->hw.dpmbase +
|
|
(rx_config->base_addr_Rx_status_elements % SDLA_WINDOWSIZE));
|
|
card->u.c.rxbuf_last =
|
|
(CHDLC_DATA_RX_STATUS_EL_STRUCT *)card->u.c.rxbuf_base
|
|
+ (rx_config->number_Rx_status_elements - 1);
|
|
|
|
/* Set up next pointer to be used */
|
|
card->u.c.txbuf = (void *)(card->hw.dpmbase +
|
|
(tx_config->next_Tx_status_element_to_use % SDLA_WINDOWSIZE));
|
|
card->u.c.rxmb = (void *)(card->hw.dpmbase +
|
|
(rx_config->next_Rx_status_element_to_use % SDLA_WINDOWSIZE));
|
|
}
|
|
|
|
/* Setup Actual Buffer Start and end addresses */
|
|
card->u.c.rx_base = rx_config->base_addr_Rx_buffer;
|
|
card->u.c.rx_top = rx_config->end_addr_Rx_buffer;
|
|
|
|
}
|
|
|
|
/*=============================================================================
|
|
* Perform Interrupt Test by running READ_CHDLC_CODE_VERSION command MAX_INTR
|
|
* _TEST_COUNTER times.
|
|
*/
|
|
static int intr_test( sdla_t* card)
|
|
{
|
|
CHDLC_MAILBOX_STRUCT* mb = card->mbox;
|
|
int err,i;
|
|
|
|
Intr_test_counter = 0;
|
|
|
|
err = chdlc_set_intr_mode(card, APP_INT_ON_COMMAND_COMPLETE);
|
|
|
|
if (err == CMD_OK) {
|
|
for (i = 0; i < MAX_INTR_TEST_COUNTER; i ++) {
|
|
mb->buffer_length = 0;
|
|
mb->command = READ_CHDLC_CODE_VERSION;
|
|
err = sdla_exec(mb) ? mb->return_code : CMD_TIMEOUT;
|
|
if (err != CMD_OK)
|
|
chdlc_error(card, err, mb);
|
|
}
|
|
}
|
|
else {
|
|
return err;
|
|
}
|
|
|
|
err = chdlc_set_intr_mode(card, 0);
|
|
|
|
if (err != CMD_OK)
|
|
return err;
|
|
|
|
return 0;
|
|
}
|
|
|
|
/*==============================================================================
|
|
* Determine what type of UDP call it is. CPIPEAB ?
|
|
*/
|
|
static int udp_pkt_type(struct sk_buff *skb, sdla_t* card)
|
|
{
|
|
chdlc_udp_pkt_t *chdlc_udp_pkt = (chdlc_udp_pkt_t *)skb->data;
|
|
|
|
#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;
|
|
}
|
|
}
|
|
|
|
/*============================================================================
|
|
* Set PORT state.
|
|
*/
|
|
static void port_set_state (sdla_t *card, int state)
|
|
{
|
|
if (card->u.c.state != state)
|
|
{
|
|
switch (state)
|
|
{
|
|
case WAN_CONNECTED:
|
|
printk (KERN_INFO "%s: Link connected!\n",
|
|
card->devname);
|
|
break;
|
|
|
|
case WAN_CONNECTING:
|
|
printk (KERN_INFO "%s: Link connecting...\n",
|
|
card->devname);
|
|
break;
|
|
|
|
case WAN_DISCONNECTED:
|
|
printk (KERN_INFO "%s: Link disconnected!\n",
|
|
card->devname);
|
|
break;
|
|
}
|
|
|
|
card->wandev.state = card->u.c.state = state;
|
|
if (card->wandev.dev){
|
|
struct net_device *dev = card->wandev.dev;
|
|
chdlc_private_area_t *chdlc_priv_area = dev->priv;
|
|
chdlc_priv_area->common.state = state;
|
|
}
|
|
}
|
|
}
|
|
|
|
/*===========================================================================
|
|
* config_chdlc
|
|
*
|
|
* Configure the chdlc protocol and enable communications.
|
|
*
|
|
* The if_open() function binds this function to the poll routine.
|
|
* Therefore, this function will run every time the chdlc interface
|
|
* is brought up. We cannot run this function from the if_open
|
|
* because if_open does not have access to the remote IP address.
|
|
*
|
|
* If the communications are not enabled, proceed to configure
|
|
* the card and enable communications.
|
|
*
|
|
* If the communications are enabled, it means that the interface
|
|
* was shutdown by ether the user or driver. In this case, we
|
|
* have to check that the IP addresses have not changed. If
|
|
* the IP addresses have changed, we have to reconfigure the firmware
|
|
* and update the changed IP addresses. Otherwise, just exit.
|
|
*
|
|
*/
|
|
|
|
static int config_chdlc (sdla_t *card)
|
|
{
|
|
struct net_device *dev = card->wandev.dev;
|
|
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 don't 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;
|
|
}
|
|
|
|
|
|
/*============================================================
|
|
* 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(struct net_device *dev)
|
|
{
|
|
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() work entry into the keventd work queue
|
|
* 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(struct net_device *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;
|
|
}
|
|
schedule_work(&chdlc_priv_area->poll_work);
|
|
}
|
|
|
|
|
|
static void chdlc_poll_delay (unsigned long dev_ptr)
|
|
{
|
|
struct net_device *dev = (struct net_device *)dev_ptr;
|
|
trigger_chdlc_poll(dev);
|
|
}
|
|
|
|
|
|
void s508_lock (sdla_t *card, unsigned long *smp_flags)
|
|
{
|
|
spin_lock_irqsave(&card->wandev.lock, *smp_flags);
|
|
if (card->next){
|
|
spin_lock(&card->next->wandev.lock);
|
|
}
|
|
}
|
|
|
|
void s508_unlock (sdla_t *card, unsigned long *smp_flags)
|
|
{
|
|
if (card->next){
|
|
spin_unlock(&card->next->wandev.lock);
|
|
}
|
|
spin_unlock_irqrestore(&card->wandev.lock, *smp_flags);
|
|
}
|
|
|
|
//*********** TTY SECTION ****************
|
|
|
|
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)
|
|
{
|
|
schedule_work(&card->tty_work);
|
|
}
|
|
|
|
static void tty_poll_work (void* data)
|
|
{
|
|
sdla_t *card = (sdla_t*)data;
|
|
struct tty_struct *tty;
|
|
|
|
if ((tty=card->tty)==NULL)
|
|
return;
|
|
|
|
tty_wakeup(tty);
|
|
#if defined(SERIAL_HAVE_POLL_WAIT)
|
|
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);
|
|
|
|
kfree(card->tty_buf);
|
|
card->tty_buf = NULL;
|
|
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 = tty->index;
|
|
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, 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 (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;
|
|
struct tty_ldisc *ld;
|
|
|
|
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);
|
|
ld = tty_ldisc_ref(tty);
|
|
if (ld) {
|
|
if (ld->receive_buf)
|
|
ld->receive_buf(tty,card->tty_rx,&fp,olen);
|
|
tty_ldisc_deref(ld);
|
|
}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;
|
|
|
|
#if defined(SERIAL_HAVE_POLL_WAIT)
|
|
wake_up_interruptible(&tty->poll_wait);
|
|
#endif
|
|
tty_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.owner = THIS_MODULE;
|
|
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 = 1; /* !@!@^#^&!! */
|
|
|
|
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;
|
|
|
|
if (tty_register_driver(&serial_driver)){
|
|
printk(KERN_INFO "%s: Failed to register serial 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->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;
|
|
|
|
INIT_WORK(&card->tty_work, tty_poll_work, (void*)card);
|
|
return 0;
|
|
}
|
|
|
|
|
|
MODULE_LICENSE("GPL");
|
|
|
|
/****** End ****************************************************************/
|