diff options
| author | Linus Torvalds <torvalds@ppc970.osdl.org> | 2005-04-16 15:20:36 -0700 |
|---|---|---|
| committer | Linus Torvalds <torvalds@ppc970.osdl.org> | 2005-04-16 15:20:36 -0700 |
| commit | 1da177e4c3f41524e886b7f1b8a0c1fc7321cac2 (patch) | |
| tree | 0bba044c4ce775e45a88a51686b5d9f90697ea9d /drivers/net/wan/sdla_fr.c | |
Linux-2.6.12-rc2v2.6.12-rc2
Initial git repository build. I'm not bothering with the full history,
even though we have it. We can create a separate "historical" git
archive of that later if we want to, and in the meantime it's about
3.2GB when imported into git - space that would just make the early
git days unnecessarily complicated, when we don't have a lot of good
infrastructure for it.
Let it rip!
Diffstat (limited to 'drivers/net/wan/sdla_fr.c')
| -rw-r--r-- | drivers/net/wan/sdla_fr.c | 5068 |
1 files changed, 5068 insertions, 0 deletions
diff --git a/drivers/net/wan/sdla_fr.c b/drivers/net/wan/sdla_fr.c new file mode 100644 index 000000000000..2efccb0554c0 --- /dev/null +++ b/drivers/net/wan/sdla_fr.c @@ -0,0 +1,5068 @@ +/***************************************************************************** +* sdla_fr.c WANPIPE(tm) Multiprotocol WAN Link Driver. Frame relay module. +* +* Author(s): Nenad Corbic <ncorbic@sangoma.com> +* Gideon Hack +* +* Copyright: (c) 1995-2001 Sangoma Technologies Inc. +* +* This program is free software; you can redistribute it and/or +* modify it under the terms of the GNU General Public License +* as published by the Free Software Foundation; either version +* 2 of the License, or (at your option) any later version. +* ============================================================================ +* Nov 23, 2000 Nenad Corbic o Added support for 2.4.X kernels +* Nov 15, 2000 David Rokavarg +* Nenad Corbic o Added frame relay bridging support. +* Original code from Mark Wells and Kristian Hoffmann has +* been integrated into the frame relay driver. +* Nov 13, 2000 Nenad Corbic o Added true interface type encoding option. +* Tcpdump doesn't support Frame Relay inteface +* types, to fix this true type option will set +* the interface type to RAW IP mode. +* Nov 07, 2000 Nenad Corbic o Added security features for UDP debugging: +* Deny all and specify allowed requests. +* Nov 06, 2000 Nenad Corbic o Wanpipe interfaces conform to raw packet interfaces. +* Moved the if_header into the if_send() routine. +* The if_header() was breaking the libpcap +* support. i.e. support for tcpdump, ethereal ... +* Oct 12. 2000 Nenad Corbic o Added error message in fr_configure +* Jul 31, 2000 Nenad Corbic o Fixed the Router UP Time. +* Apr 28, 2000 Nenad Corbic o Added the option to shutdown an interface +* when the channel gets disconnected. +* Apr 28, 2000 Nenad Corbic o Added M.Grants patch: disallow duplicate +* interface setups. +* Apr 25, 2000 Nenad Corbic o Added M.Grants patch: dynamically add/remove +* new dlcis/interfaces. +* Mar 23, 2000 Nenad Corbic o Improved task queue, bh handling. +* Mar 16, 2000 Nenad Corbic o Added Inverse ARP support +* Mar 13, 2000 Nenad Corbic o Added new socket API support. +* Mar 06, 2000 Nenad Corbic o Bug Fix: corrupted mbox recovery. +* Feb 24, 2000 Nenad Corbic o Fixed up FT1 UDP debugging problem. +* Dev 15, 1999 Nenad Corbic o Fixed up header files for 2.0.X kernels +* +* Nov 08, 1999 Nenad Corbic o Combined all debug UDP calls into one function +* o Removed the ARP support. This has to be done +* in the next version. +* o Only a Node can implement NO signalling. +* Initialize DLCI during if_open() if NO +* signalling. +* o Took out IPX support, implement in next +* version +* Sep 29, 1999 Nenad Corbic o Added SMP support and changed the update +* function to use timer interrupt. +* o Fixed the CIR bug: Set the value of BC +* to CIR when the CIR is enabled. +* o Updated comments, statistics and tracing. +* Jun 02, 1999 Gideon Hack o Updated for S514 support. +* Sep 18, 1998 Jaspreet Singh o Updated for 2.2.X kernels. +* Jul 31, 1998 Jaspreet Singh o Removed wpf_poll routine. The channel/DLCI +* status is received through an event interrupt. +* Jul 08, 1998 David Fong o Added inverse ARP support. +* Mar 26, 1997 Jaspreet Singh o Returning return codes for failed UDP cmds. +* Jan 28, 1997 Jaspreet Singh o Improved handling of inactive DLCIs. +* Dec 30, 1997 Jaspreet Singh o Replaced dev_tint() with mark_bh(NET_BH) +* Dec 16, 1997 Jaspreet Singh o Implemented Multiple IPX support. +* Nov 26, 1997 Jaspreet Singh o Improved load sharing with multiple boards +* o Added Cli() to protect enabling of interrupts +* while polling is called. +* Nov 24, 1997 Jaspreet Singh o Added counters to avoid enabling of interrupts +* when they have been disabled by another +* interface or routine (eg. wpf_poll). +* Nov 06, 1997 Jaspreet Singh o Added INTR_TEST_MODE to avoid polling +* routine disable interrupts during interrupt +* testing. +* Oct 20, 1997 Jaspreet Singh o Added hooks in for Router UP time. +* Oct 16, 1997 Jaspreet Singh o The critical flag is used to maintain flow +* control by avoiding RACE conditions. The +* cli() and restore_flags() are taken out. +* The fr_channel structure is appended for +* Driver Statistics. +* Oct 15, 1997 Farhan Thawar o updated if_send() and receive for IPX +* Aug 29, 1997 Farhan Thawar o Removed most of the cli() and sti() +* o Abstracted the UDP management stuff +* o Now use tbusy and critical more intelligently +* Jul 21, 1997 Jaspreet Singh o Can configure T391, T392, N391, N392 & N393 +* through router.conf. +* o Protected calls to sdla_peek() by adDing +* save_flags(), cli() and restore_flags(). +* o Added error message for Inactive DLCIs in +* fr_event() and update_chan_state(). +* o Fixed freeing up of buffers using kfree() +* when packets are received. +* Jul 07, 1997 Jaspreet Singh o Added configurable TTL for UDP packets +* o Added ability to discard multicast and +* broadcast source addressed packets +* Jun 27, 1997 Jaspreet Singh o Added FT1 monitor capabilities +* New case (0x44) statement in if_send routine +* Added a global variable rCount to keep track +* of FT1 status enabled on the board. +* May 29, 1997 Jaspreet Singh o Fixed major Flow Control Problem +* With multiple boards a problem was seen where +* the second board always stopped transmitting +* packet after running for a while. The code +* got into a stage where the interrupts were +* disabled and dev->tbusy was set to 1. +* This caused the If_send() routine to get into +* the if clause for it(0,dev->tbusy) +* forever. +* The code got into this stage due to an +* interrupt occurring within the if clause for +* set_bit(0,dev->tbusy). Since an interrupt +* disables furhter transmit interrupt and +* makes dev->tbusy = 0, this effect was undone +* by making dev->tbusy = 1 in the if clause. +* The Fix checks to see if Transmit interrupts +* are disabled then do not make dev->tbusy = 1 +* Introduced a global variable: int_occur and +* added tx_int_enabled in the wan_device +* structure. +* May 21, 1997 Jaspreet Singh o Fixed UDP Management for multiple +* boards. +* +* Apr 25, 1997 Farhan Thawar o added UDP Management stuff +* o fixed bug in if_send() and tx_intr() to +* sleep and wakeup all devices +* Mar 11, 1997 Farhan Thawar Version 3.1.1 +* o fixed (+1) bug in fr508_rx_intr() +* o changed if_send() to return 0 if +* wandev.critical() is true +* o free socket buffer in if_send() if +* returning 0 +* o added tx_intr() routine +* Jan 30, 1997 Gene Kozin Version 3.1.0 +* o implemented exec() entry point +* o fixed a bug causing driver configured as +* a FR switch to be stuck in WAN_ +* mode +* Jan 02, 1997 Gene Kozin Initial version. +*****************************************************************************/ + +#include <linux/module.h> +#include <linux/kernel.h> /* printk(), and other useful stuff */ +#include <linux/stddef.h> /* offsetof(), etc. */ +#include <linux/errno.h> /* return codes */ +#include <linux/string.h> /* inline memset(), etc. */ +#include <linux/slab.h> /* kmalloc(), kfree() */ +#include <linux/wanrouter.h> /* WAN router definitions */ +#include <linux/wanpipe.h> /* WANPIPE common user API definitions */ +#include <linux/workqueue.h> +#include <linux/if_arp.h> /* ARPHRD_* defines */ +#include <asm/byteorder.h> /* htons(), etc. */ +#include <asm/io.h> /* for inb(), outb(), etc. */ +#include <linux/time.h> /* for do_gettimeofday */ +#include <linux/in.h> /* sockaddr_in */ +#include <asm/errno.h> + +#include <linux/ip.h> +#include <linux/if.h> + +#include <linux/if_wanpipe_common.h> /* Wanpipe Socket */ +#include <linux/if_wanpipe.h> + +#include <linux/sdla_fr.h> /* frame relay firmware API definitions */ + +#include <asm/uaccess.h> +#include <linux/inetdevice.h> +#include <linux/netdevice.h> + +#include <net/route.h> /* Dynamic Route Creation */ +#include <linux/etherdevice.h> /* eth_type_trans() used for bridging */ +#include <linux/random.h> + +/****** Defines & Macros ****************************************************/ + +#define MAX_CMD_RETRY 10 /* max number of firmware retries */ + +#define FR_HEADER_LEN 8 /* max encapsulation header size */ +#define FR_CHANNEL_MTU 1500 /* unfragmented logical channel MTU */ + +/* Q.922 frame types */ +#define Q922_UI 0x03 /* Unnumbered Info frame */ +#define Q922_XID 0xAF + +/* DLCI configured or not */ +#define DLCI_NOT_CONFIGURED 0x00 +#define DLCI_CONFIG_PENDING 0x01 +#define DLCI_CONFIGURED 0x02 + +/* CIR enabled or not */ +#define CIR_ENABLED 0x00 +#define CIR_DISABLED 0x01 + +#define FRAME_RELAY_API 1 +#define MAX_BH_BUFF 10 + +/* For handle_IPXWAN() */ +#define CVHexToAscii(b) (((unsigned char)(b) > (unsigned char)9) ? ((unsigned char)'A' + ((unsigned char)(b) - (unsigned char)10)) : ((unsigned char)'0' + (unsigned char)(b))) + +/****** Data Structures *****************************************************/ + +/* This is an extention of the 'struct device' we create for each network + * interface to keep the rest of channel-specific data. + */ +typedef struct fr_channel +{ + wanpipe_common_t common; + char name[WAN_IFNAME_SZ+1]; /* interface name, ASCIIZ */ + unsigned dlci_configured ; /* check whether configured or not */ + unsigned cir_status; /* check whether CIR enabled or not */ + unsigned dlci; /* logical channel number */ + unsigned cir; /* committed information rate */ + unsigned bc; /* committed burst size */ + unsigned be; /* excess burst size */ + unsigned mc; /* multicast support on or off */ + unsigned tx_int_status; /* Transmit Interrupt Status */ + unsigned short pkt_length; /* Packet Length */ + unsigned long router_start_time;/* Router start time in seconds */ + unsigned long tick_counter; /* counter for transmit time out */ + char dev_pending_devtint; /* interface pending dev_tint() */ + void *dlci_int_interface; /* pointer to the DLCI Interface */ + unsigned long IB_addr; /* physical address of Interface Byte */ + unsigned long state_tick; /* time of the last state change */ + unsigned char enable_IPX; /* Enable/Disable the use of IPX */ + unsigned long network_number; /* Internal Network Number for IPX*/ + sdla_t *card; /* -> owner */ + unsigned route_flag; /* Add/Rem dest addr in route tables */ + unsigned inarp; /* Inverse Arp Request status */ + long inarp_ready; /* Ready to send requests */ + int inarp_interval; /* Time between InArp Requests */ + unsigned long inarp_tick; /* InArp jiffies tick counter */ + long interface_down; /* Bring interface down on disconnect */ + struct net_device_stats ifstats; /* interface statistics */ + if_send_stat_t drvstats_if_send; + rx_intr_stat_t drvstats_rx_intr; + pipe_mgmt_stat_t drvstats_gen; + unsigned long router_up_time; + + unsigned short transmit_length; + struct sk_buff *delay_skb; + + bh_data_t *bh_head; /* Circular buffer for chdlc_bh */ + unsigned long tq_working; + volatile int bh_write; + volatile int bh_read; + atomic_t bh_buff_used; + + /* Polling task queue. Each interface + * has its own task queue, which is used + * to defer events from the interrupt */ + struct work_struct fr_poll_work; + struct timer_list fr_arp_timer; + + u32 ip_local; + u32 ip_remote; + long config_dlci; + long unconfig_dlci; + + /* Whether this interface should be setup as a gateway. + * Used by dynamic route setup code */ + u8 gateway; + + /* True interface type */ + u8 true_if_encoding; + u8 fr_header[FR_HEADER_LEN]; + char fr_header_len; + +} fr_channel_t; + +/* Route Flag options */ +#define NO_ROUTE 0x00 +#define ADD_ROUTE 0x01 +#define ROUTE_ADDED 0x02 +#define REMOVE_ROUTE 0x03 +#define ARP_REQ 0x04 + +/* inarp options */ +#define INARP_NONE 0x00 +#define INARP_REQUEST 0x01 +#define INARP_CONFIGURED 0x02 + +/* reasons for enabling the timer interrupt on the adapter */ +#define TMR_INT_ENABLED_UDP 0x01 +#define TMR_INT_ENABLED_UPDATE 0x02 +#define TMR_INT_ENABLED_ARP 0x04 +#define TMR_INT_ENABLED_UPDATE_STATE 0x08 +#define TMR_INT_ENABLED_CONFIG 0x10 +#define TMR_INT_ENABLED_UNCONFIG 0x20 + + +typedef struct dlci_status +{ + unsigned short dlci PACKED; + unsigned char state PACKED; +} dlci_status_t; + +typedef struct dlci_IB_mapping +{ + unsigned short dlci PACKED; + unsigned long addr_value PACKED; +} dlci_IB_mapping_t; + +/* This structure is used for DLCI list Tx interrupt mode. It is used to + enable interrupt bit and set the packet length for transmission + */ +typedef struct fr_dlci_interface +{ + unsigned char gen_interrupt PACKED; + unsigned short packet_length PACKED; + unsigned char reserved PACKED; +} fr_dlci_interface_t; + +/* variable for keeping track of enabling/disabling FT1 monitor status */ +static int rCount = 0; + +extern void disable_irq(unsigned int); +extern void enable_irq(unsigned int); + +/* variable for keeping track of number of interrupts generated during + * interrupt test routine + */ +static int Intr_test_counter; + +/****** Function Prototypes *************************************************/ + +/* WAN link driver entry points. These are called by the WAN router module. */ +static int update(struct wan_device *wandev); +static int new_if(struct wan_device *wandev, struct net_device *dev, + wanif_conf_t *conf); +static int del_if(struct wan_device *wandev, struct net_device *dev); +static void disable_comm (sdla_t *card); + +/* WANPIPE-specific entry points */ +static int wpf_exec(struct sdla *card, void *u_cmd, void *u_data); + +/* Network device interface */ +static int if_init(struct net_device *dev); +static int if_open(struct net_device *dev); +static int if_close(struct net_device *dev); + +static void if_tx_timeout(struct net_device *dev); + +static int if_rebuild_hdr (struct sk_buff *skb); + +static int if_send(struct sk_buff *skb, struct net_device *dev); +static int chk_bcast_mcast_addr(sdla_t *card, struct net_device* dev, + struct sk_buff *skb); +static struct net_device_stats *if_stats(struct net_device *dev); + +/* Interrupt handlers */ +static void fr_isr(sdla_t *card); +static void rx_intr(sdla_t *card); +static void tx_intr(sdla_t *card); +static void timer_intr(sdla_t *card); +static void spur_intr(sdla_t *card); + +/* Frame relay firmware interface functions */ +static int fr_read_version(sdla_t *card, char *str); +static int fr_configure(sdla_t *card, fr_conf_t *conf); +static int fr_dlci_configure(sdla_t *card, fr_dlc_conf_t *conf, unsigned dlci); +static int fr_init_dlci (sdla_t *card, fr_channel_t *chan); +static int fr_set_intr_mode (sdla_t *card, unsigned mode, unsigned mtu, unsigned short timeout); +static int fr_comm_enable(sdla_t *card); +static void fr_comm_disable(sdla_t *card); +static int fr_get_err_stats(sdla_t *card); +static int fr_get_stats(sdla_t *card); +static int fr_add_dlci(sdla_t *card, int dlci); +static int fr_activate_dlci(sdla_t *card, int dlci); +static int fr_delete_dlci (sdla_t* card, int dlci); +static int fr_issue_isf(sdla_t *card, int isf); +static int fr_send(sdla_t *card, int dlci, unsigned char attr, int len, + void *buf); +static int fr_send_data_header(sdla_t *card, int dlci, unsigned char attr, int len, + void *buf,unsigned char hdr_len); +static unsigned int fr_send_hdr(sdla_t *card, int dlci, unsigned int offset); + +static int check_dlci_config (sdla_t *card, fr_channel_t *chan); +static void initialize_rx_tx_buffers (sdla_t *card); + + +/* Firmware asynchronous event handlers */ +static int fr_event(sdla_t *card, int event, fr_mbox_t *mbox); +static int fr_modem_failure(sdla_t *card, fr_mbox_t *mbox); +static int fr_dlci_change(sdla_t *card, fr_mbox_t *mbox); + +/* Miscellaneous functions */ +static int update_chan_state(struct net_device *dev); +static void set_chan_state(struct net_device *dev, int state); +static struct net_device *find_channel(sdla_t *card, unsigned dlci); +static int is_tx_ready(sdla_t *card, fr_channel_t *chan); +static unsigned int dec_to_uint(unsigned char *str, int len); +static int reply_udp( unsigned char *data, unsigned int mbox_len ); + +static int intr_test( sdla_t* card ); +static void init_chan_statistics( fr_channel_t* chan ); +static void init_global_statistics( sdla_t* card ); +static void read_DLCI_IB_mapping( sdla_t* card, fr_channel_t* chan ); +static int setup_for_delayed_transmit(struct net_device* dev, + struct sk_buff *skb); + +struct net_device *move_dev_to_next(sdla_t *card, struct net_device *dev); +static int check_tx_status(sdla_t *card, struct net_device *dev); + +/* Frame Relay Socket API */ +static void trigger_fr_bh (fr_channel_t *); +static void fr_bh(struct net_device *dev); +static int fr_bh_cleanup(struct net_device *dev); +static int bh_enqueue(struct net_device *dev, struct sk_buff *skb); + +static void trigger_fr_poll(struct net_device *dev); +static void fr_poll(struct net_device *dev); +//static void add_gateway(struct net_device *dev); + +static void trigger_unconfig_fr(struct net_device *dev); +static void unconfig_fr (sdla_t *); + +static void trigger_config_fr (sdla_t *); +static void config_fr (sdla_t *); + + +/* Inverse ARP and Dynamic routing functions */ +int process_ARP(arphdr_1490_t *ArpPacket, sdla_t *card, struct net_device *dev); +int is_arp(void *buf); +int send_inarp_request(sdla_t *card, struct net_device *dev); + +static void trigger_fr_arp(struct net_device *dev); +static void fr_arp (unsigned long data); + + +/* Udp management functions */ +static int process_udp_mgmt_pkt(sdla_t *card); +static int udp_pkt_type( struct sk_buff *skb, sdla_t *card ); +static int store_udp_mgmt_pkt(int udp_type, char udp_pkt_src, sdla_t* card, + struct sk_buff *skb, int dlci); + +/* IPX functions */ +static void switch_net_numbers(unsigned char *sendpacket, + unsigned long network_number, unsigned char incoming); + +static int handle_IPXWAN(unsigned char *sendpacket, char *devname, + unsigned char enable_IPX, unsigned long network_number); + +/* Lock Functions: SMP supported */ +void s508_s514_unlock(sdla_t *card, unsigned long *smp_flags); +void s508_s514_lock(sdla_t *card, unsigned long *smp_flags); + +unsigned short calc_checksum (char *, int); +static int setup_fr_header(struct sk_buff** skb, + struct net_device* dev, char op_mode); + + +/****** Public Functions ****************************************************/ + +/*============================================================================ + * Frame relay protocol initialization routine. + * + * This routine is called by the main WANPIPE module during setup. At this + * point adapter is completely initialized and firmware is running. + * o read firmware version (to make sure it's alive) + * o configure adapter + * o initialize protocol-specific fields of the adapter data space. + * + * Return: 0 o.k. + * < 0 failure. + */ +int wpf_init(sdla_t *card, wandev_conf_t *conf) +{ + + int err; + fr508_flags_t* flags; + + union + { + char str[80]; + fr_conf_t cfg; + } u; + + fr_buf_info_t* buf_info; + int i; + + + printk(KERN_INFO "\n"); + + /* Verify configuration ID */ + if (conf->config_id != WANCONFIG_FR) { + + printk(KERN_INFO "%s: invalid configuration ID %u!\n", + card->devname, conf->config_id); + return -EINVAL; + + } + + /* Initialize protocol-specific fields of adapter data space */ + switch (card->hw.fwid) { + + case SFID_FR508: + card->mbox = (void*)(card->hw.dpmbase + + FR508_MBOX_OFFS); + card->flags = (void*)(card->hw.dpmbase + + FR508_FLAG_OFFS); + if(card->hw.type == SDLA_S514) { + card->mbox += FR_MB_VECTOR; + card->flags += FR_MB_VECTOR; + } + card->isr = &fr_isr; + break; + + default: + return -EINVAL; + } + + flags = card->flags; + + /* Read firmware version. Note that when adapter initializes, it + * clears the mailbox, so it may appear that the first command was + * executed successfully when in fact it was merely erased. To work + * around this, we execute the first command twice. + */ + + if (fr_read_version(card, NULL) || fr_read_version(card, u.str)) + return -EIO; + + printk(KERN_INFO "%s: running frame relay firmware v%s\n", + card->devname, u.str); + + /* Adjust configuration */ + conf->mtu += FR_HEADER_LEN; + conf->mtu = (conf->mtu >= MIN_LGTH_FR_DATA_CFG) ? + min_t(unsigned int, conf->mtu, FR_MAX_NO_DATA_BYTES_IN_FRAME) : + FR_CHANNEL_MTU + FR_HEADER_LEN; + + conf->bps = min_t(unsigned int, conf->bps, 2048000); + + /* Initialze the configuration structure sent to the board to zero */ + memset(&u.cfg, 0, sizeof(u.cfg)); + + memset(card->u.f.dlci_to_dev_map, 0, sizeof(card->u.f.dlci_to_dev_map)); + + /* Configure adapter firmware */ + + u.cfg.mtu = conf->mtu; + u.cfg.kbps = conf->bps / 1000; + + u.cfg.cir_fwd = u.cfg.cir_bwd = 16; + u.cfg.bc_fwd = u.cfg.bc_bwd = 16; + + u.cfg.options = 0x0000; + printk(KERN_INFO "%s: Global CIR enabled by Default\n", card->devname); + + switch (conf->u.fr.signalling) { + + case WANOPT_FR_ANSI: + u.cfg.options = 0x0000; + break; + + case WANOPT_FR_Q933: + u.cfg.options |= 0x0200; + break; + + case WANOPT_FR_LMI: + u.cfg.options |= 0x0400; + break; + + case WANOPT_NO: + u.cfg.options |= 0x0800; + break; + default: + printk(KERN_INFO "%s: Illegal Signalling option\n", + card->wandev.name); + return -EINVAL; + } + + + card->wandev.signalling = conf->u.fr.signalling; + + if (conf->station == WANOPT_CPE) { + + + if (conf->u.fr.signalling == WANOPT_NO){ + printk(KERN_INFO + "%s: ERROR - For NO signalling, station must be set to Node!", + card->devname); + return -EINVAL; + } + + u.cfg.station = 0; + u.cfg.options |= 0x8000; /* auto config DLCI */ + card->u.f.dlci_num = 0; + + } else { + + u.cfg.station = 1; /* switch emulation mode */ + + /* For switch emulation we have to create a list of dlci(s) + * that will be sent to be global SET_DLCI_CONFIGURATION + * command in fr_configure() routine. + */ + + card->u.f.dlci_num = min_t(unsigned int, max_t(unsigned int, conf->u.fr.dlci_num, 1), 100); + + for ( i = 0; i < card->u.f.dlci_num; i++) { + + card->u.f.node_dlci[i] = (unsigned short) + conf->u.fr.dlci[i] ? conf->u.fr.dlci[i] : 16; + + } + } + + if (conf->clocking == WANOPT_INTERNAL) + u.cfg.port |= 0x0001; + + if (conf->interface == WANOPT_RS232) + u.cfg.port |= 0x0002; + + if (conf->u.fr.t391) + u.cfg.t391 = min_t(unsigned int, conf->u.fr.t391, 30); + else + u.cfg.t391 = 5; + + if (conf->u.fr.t392) + u.cfg.t392 = min_t(unsigned int, conf->u.fr.t392, 30); + else + u.cfg.t392 = 15; + + if (conf->u.fr.n391) + u.cfg.n391 = min_t(unsigned int, conf->u.fr.n391, 255); + else + u.cfg.n391 = 2; + + if (conf->u.fr.n392) + u.cfg.n392 = min_t(unsigned int, conf->u.fr.n392, 10); + else + u.cfg.n392 = 3; + + if (conf->u.fr.n393) + u.cfg.n393 = min_t(unsigned int, conf->u.fr.n393, 10); + else + u.cfg.n393 = 4; + + if (fr_configure(card, &u.cfg)) + return -EIO; + + if (card->hw.type == SDLA_S514) { + + buf_info = (void*)(card->hw.dpmbase + FR_MB_VECTOR + + FR508_RXBC_OFFS); + + card->rxmb = (void*)(buf_info->rse_next + card->hw.dpmbase); + + card->u.f.rxmb_base = + (void*)(buf_info->rse_base + card->hw.dpmbase); + + card->u.f.rxmb_last = + (void*)(buf_info->rse_base + + (buf_info->rse_num - 1) * sizeof(fr_rx_buf_ctl_t) + + card->hw.dpmbase); + }else{ + buf_info = (void*)(card->hw.dpmbase + FR508_RXBC_OFFS); + + card->rxmb = (void*)(buf_info->rse_next - + FR_MB_VECTOR + card->hw.dpmbase); + + card->u.f.rxmb_base = + (void*)(buf_info->rse_base - + FR_MB_VECTOR + card->hw.dpmbase); + + card->u.f.rxmb_last = + (void*)(buf_info->rse_base + + (buf_info->rse_num - 1) * sizeof(fr_rx_buf_ctl_t) - + FR_MB_VECTOR + card->hw.dpmbase); + } + + card->u.f.rx_base = buf_info->buf_base; + card->u.f.rx_top = buf_info->buf_top; + + card->u.f.tx_interrupts_pending = 0; + + card->wandev.mtu = conf->mtu; + card->wandev.bps = conf->bps; + card->wandev.interface = conf->interface; + card->wandev.clocking = conf->clocking; + card->wandev.station = conf->station; + card->poll = NULL; + card->exec = &wpf_exec; + card->wandev.update = &update; + card->wandev.new_if = &new_if; + card->wandev.del_if = &del_if; + card->wandev.state = WAN_DISCONNECTED; + card->wandev.ttl = conf->ttl; + card->wandev.udp_port = conf->udp_port; + card->disable_comm = &disable_comm; + card->u.f.arp_dev = NULL; + + /* Intialize global statistics for a card */ + init_global_statistics( card ); + + card->TracingEnabled = 0; + + /* Interrupt Test */ + Intr_test_counter = 0; + card->intr_mode = INTR_TEST_MODE; + err = intr_test( card ); + + printk(KERN_INFO "%s: End of Interrupt Test rc=0x%x count=%i\n", + card->devname,err,Intr_test_counter); + + if (err || (Intr_test_counter < MAX_INTR_TEST_COUNTER)) { + printk(KERN_ERR "%s: Interrupt Test Failed, Counter: %i\n", + card->devname, Intr_test_counter); + printk(KERN_ERR "Please choose another interrupt\n"); + err = -EIO; + return err; + } + + printk(KERN_INFO "%s: Interrupt Test Passed, Counter: %i\n", + card->devname, Intr_test_counter); + + + /* Apr 28 2000. Nenad Corbic + * Enable commnunications here, not in if_open or new_if, since + * interfaces come down when the link is disconnected. + */ + + /* If you enable comms and then set ints, you get a Tx int as you + * perform the SET_INT_TRIGGERS command. So, we only set int + * triggers and then adjust the interrupt mask (to disable Tx ints) + * before enabling comms. + */ + if (fr_set_intr_mode(card, (FR_INTR_RXRDY | FR_INTR_TXRDY | + FR_INTR_DLC | FR_INTR_TIMER | FR_INTR_TX_MULT_DLCIs) , + card->wandev.mtu, 0)) { + return -EIO; + } + + flags->imask &= ~(FR_INTR_TXRDY | FR_INTR_TIMER); + + if (fr_comm_enable(card)) { + return -EIO; + } + wanpipe_set_state(card, WAN_CONNECTED); + spin_lock_init(&card->u.f.if_send_lock); + + printk(KERN_INFO "\n"); + + return 0; +} + +/******* WAN Device Driver Entry Points *************************************/ + +/*============================================================================ + * Update device status & statistics. + */ +static int update(struct wan_device* wandev) +{ + volatile sdla_t* card; + unsigned long timeout; + fr508_flags_t* flags; + + /* sanity checks */ + if ((wandev == NULL) || (wandev->private == NULL)) + return -EFAULT; + + if (wandev->state == WAN_UNCONFIGURED) + return -ENODEV; + + card = wandev->private; + flags = card->flags; + + + card->u.f.update_comms_stats = 1; + card->u.f.timer_int_enabled |= TMR_INT_ENABLED_UPDATE; + flags->imask |= FR_INTR_TIMER; + timeout = jiffies; + for(;;) { + if(card->u.f.update_comms_stats == 0) + break; + if ((jiffies - timeout) > (1 * HZ)){ + card->u.f.update_comms_stats = 0; + 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; + fr_channel_t* chan; + int dlci = 0; + int err = 0; + + + if ((conf->name[0] == '\0') || (strlen(conf->name) > WAN_IFNAME_SZ)) { + + printk(KERN_INFO "%s: Invalid interface name!\n", + card->devname); + return -EINVAL; + } + + /* allocate and initialize private data */ + chan = kmalloc(sizeof(fr_channel_t), GFP_KERNEL); + + if (chan == NULL) + return -ENOMEM; + + memset(chan, 0, sizeof(fr_channel_t)); + strcpy(chan->name, conf->name); + chan->card = card; + + /* verify media address */ + if (is_digit(conf->addr[0])) { + + dlci = dec_to_uint(conf->addr, 0); + + if (dlci && (dlci <= HIGHEST_VALID_DLCI)) { + + chan->dlci = dlci; + + } else { + + printk(KERN_ERR + "%s: Invalid DLCI %u on interface %s!\n", + wandev->name, dlci, chan->name); + err = -EINVAL; + } + + } else { + printk(KERN_ERR + "%s: Invalid media address on interface %s!\n", + wandev->name, chan->name); + err = -EINVAL; + } + + if ((chan->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) even if it is + * a bridged DLCI, or as an API + */ + if (strcmp(conf->usedby, "WANPIPE") == 0 || + strcmp(conf->usedby, "BRIDGE") == 0 || + strcmp(conf->usedby, "BRIDGE_N") == 0){ + + if(strcmp(conf->usedby, "WANPIPE") == 0){ + chan->common.usedby = WANPIPE; + + printk(KERN_INFO "%s: Running in WANPIPE mode.\n", + card->devname); + + }else if(strcmp(conf->usedby, "BRIDGE") == 0){ + + chan->common.usedby = BRIDGE; + + printk(KERN_INFO "%s: Running in WANPIPE (BRIDGE) mode.\n", + card->devname); + }else if( strcmp(conf->usedby, "BRIDGE_N") == 0 ){ + + chan->common.usedby = BRIDGE_NODE; + + printk(KERN_INFO "%s: Running in WANPIPE (BRIDGE_NODE) mode.\n", + card->devname); + } + + if (!err){ + /* Dynamic interface configuration option. + * On disconnect, if the options is selected, + * the interface will be brought down */ + if (conf->if_down == WANOPT_YES){ + set_bit(DYN_OPT_ON,&chan->interface_down); + printk(KERN_INFO + "%s: Dynamic interface configuration enabled.\n", + card->devname); + } + } + + } else if(strcmp(conf->usedby, "API") == 0){ + + chan->common.usedby = API; + printk(KERN_INFO "%s: Running in API mode.\n", + wandev->name); + } + + if (err) { + + kfree(chan); + return err; + } + + /* place cir,be,bc and other channel specific information into the + * chan structure + */ + if (conf->cir) { + + chan->cir = max_t(unsigned int, 1, + min_t(unsigned int, conf->cir, 512)); + chan->cir_status = CIR_ENABLED; + + + /* If CIR is enabled, force BC to equal CIR + * this solves number of potential problems if CIR is + * set and BC is not + */ + chan->bc = chan->cir; + + if (conf->be){ + chan->be = max_t(unsigned int, + 0, min_t(unsigned int, conf->be, 511)); + }else{ + conf->be = 0; + } + + printk (KERN_INFO "%s: CIR enabled for DLCI %i \n", + wandev->name,chan->dlci); + printk (KERN_INFO "%s: CIR = %i ; BC = %i ; BE = %i\n", + wandev->name,chan->cir,chan->bc,chan->be); + + + }else{ + chan->cir_status = CIR_DISABLED; + printk (KERN_INFO "%s: CIR disabled for DLCI %i\n", + wandev->name,chan->dlci); + } + + chan->mc = conf->mc; + + if (conf->inarp == WANOPT_YES){ + printk(KERN_INFO "%s: Inverse ARP Support Enabled\n",card->devname); + chan->inarp = conf->inarp ? INARP_REQUEST : INARP_NONE; + chan->inarp_interval = conf->inarp_interval ? conf->inarp_interval : 10; + }else{ + printk(KERN_INFO "%s: Inverse ARP Support Disabled\n",card->devname); + chan->inarp = INARP_NONE; + chan->inarp_interval = 10; + } + + + chan->dlci_configured = DLCI_NOT_CONFIGURED; + + + /*FIXME: IPX disabled in this WANPIPE version */ + if (conf->enable_IPX == WANOPT_YES){ + printk(KERN_INFO "%s: ERROR - This version of WANPIPE doesn't support IPX\n", + card->devname); + kfree(chan); + return -EINVAL; + }else{ + chan->enable_IPX = WANOPT_NO; + } + + if (conf->network_number){ + chan->network_number = conf->network_number; + }else{ + chan->network_number = 0xDEADBEEF; + } + + chan->route_flag = NO_ROUTE; + + init_chan_statistics(chan); + + chan->transmit_length = 0; + + /* prepare network device data space for registration */ + strcpy(dev->name,chan->name); + + dev->init = &if_init; + dev->priv = chan; + + /* Initialize FR Polling Task Queue + * We need a poll routine for each network + * interface. + */ + INIT_WORK(&chan->fr_poll_work, (void *)fr_poll, dev); + + init_timer(&chan->fr_arp_timer); + chan->fr_arp_timer.data=(unsigned long)dev; + chan->fr_arp_timer.function = fr_arp; + + wandev->new_if_cnt++; + + /* Tells us that if this interface is a + * gateway or not */ + if ((chan->gateway = conf->gateway) == WANOPT_YES){ + printk(KERN_INFO "%s: Interface %s is set as a gateway.\n", + card->devname,dev->name); + } + + /* M. Grant Patch Apr 28 2000 + * Disallow duplicate dlci configurations. */ + if (card->u.f.dlci_to_dev_map[chan->dlci] != NULL) { + kfree(chan); + return -EBUSY; + } + + /* Configure this dlci at a later date, when + * the interface comes up. i.e. when if_open() + * executes */ + set_bit(0,&chan->config_dlci); + + printk(KERN_INFO "\n"); + + return 0; +} + +/*============================================================================ + * Delete logical channel. + */ +static int del_if(struct wan_device* wandev, struct net_device* dev) +{ + fr_channel_t* chan = dev->priv; + unsigned long smp_flags=0; + + /* This interface is dead, make sure the + * ARP timer is stopped */ + del_timer(&chan->fr_arp_timer); + + /* If we are a NODE, we must unconfigure this DLCI + * Trigger an unconfigure command that will + * be executed in timer interrupt. We must wait + * for the command to complete. */ + trigger_unconfig_fr(dev); + + lock_adapter_irq(&wandev->lock, &smp_flags); + wandev->new_if_cnt--; + unlock_adapter_irq(&wandev->lock, &smp_flags); + + return 0; +} + + +/*===================================================================== + * disable_comm + * + * Description: + * Disable communications. + * This code runs in shutdown (sdlamain.c) + * under critical flag. Therefore it is not + * necessary to set a critical flag here + * + * Usage: + * Commnunications are disabled only on a card + * shutdown. + */ + +static void disable_comm (sdla_t *card) +{ + printk(KERN_INFO "%s: Disabling Communications!\n", + card->devname); + fr_comm_disable(card); +} + +/****** WANPIPE-specific entry points ***************************************/ + +/*============================================================================ + * Execute adapter interface command. + */ +static int wpf_exec (struct sdla* card, void* u_cmd, void* u_data) +{ + fr_mbox_t* mbox = card->mbox; + int retry = MAX_CMD_RETRY; + int err, len; + fr_cmd_t cmd; + + if(copy_from_user((void*)&cmd, u_cmd, sizeof(cmd))) + return -EFAULT; + + /* execute command */ + do + { + memcpy(&mbox->cmd, &cmd, sizeof(cmd)); + + if (cmd.length){ + if( copy_from_user((void*)&mbox->data, u_data, cmd.length)) + return -EFAULT; + } + + if (sdla_exec(mbox)) + err = mbox->cmd.result; + + else return -EIO; + + } while (err && retry-- && fr_event(card, err, mbox)); + + /* return result */ + if (copy_to_user(u_cmd, (void*)&mbox->cmd, sizeof(fr_cmd_t))) + return -EFAULT; + + len = mbox->cmd.length; + + if (len && u_data && !copy_to_user(u_data, (void*)&mbox->data, len)) + return -EFAULT; + 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) +{ + fr_channel_t* chan = dev->priv; + sdla_t* card = chan->card; + struct wan_device* wandev = &card->wandev; + + /* Initialize device driver entry points */ + dev->open = &if_open; + dev->stop = &if_close; + dev->hard_header = NULL; + 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; + + if (chan->common.usedby == WANPIPE || chan->common.usedby == API){ + + /* Initialize media-specific parameters */ + if (chan->true_if_encoding){ + dev->type = ARPHRD_DLCI; /* This breaks tcpdump */ + }else{ + dev->type = ARPHRD_PPP; /* ARP h/w type */ + } + + dev->flags |= IFF_POINTOPOINT; + dev->flags |= IFF_NOARP; + + /* Enable Multicast addressing */ + if (chan->mc == WANOPT_YES){ + dev->flags |= IFF_MULTICAST; + } + + dev->mtu = wandev->mtu - FR_HEADER_LEN; + /* For an API, the maximum number of bytes that the stack will pass + to the driver is (dev->mtu + dev->hard_header_len). So, adjust the + mtu so that a frame of maximum size can be transmitted by the API. + */ + if(chan->common.usedby == API) { + dev->mtu += (sizeof(api_tx_hdr_t) - FR_HEADER_LEN); + } + + dev->hard_header_len = FR_HEADER_LEN;/* media header length */ + dev->addr_len = 2; /* hardware address length */ + *(unsigned short*)dev->dev_addr = htons(chan->dlci); + + /* Set transmit buffer queue length */ + dev->tx_queue_len = 100; + + }else{ + + /* Setup the interface for Bridging */ + int hw_addr=0; + ether_setup(dev); + + /* Use a random number to generate the MAC address */ + memcpy(dev->dev_addr, "\xFE\xFC\x00\x00\x00\x00", 6); + get_random_bytes(&hw_addr, sizeof(hw_addr)); + *(int *)(dev->dev_addr + 2) += hw_addr; + } + + /* Initialize hardware parameters (just for reference) */ + 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_MODULE_OWNER(dev); + + return 0; +} + +/*============================================================================ + * Open network interface. + * o if this is the first open, then 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) +{ + fr_channel_t* chan = dev->priv; + sdla_t* card = chan->card; + int err = 0; + struct timeval tv; + + if (netif_running(dev)) + return -EBUSY; + + /* Initialize the task queue */ + chan->tq_working=0; + + INIT_WORK(&chan->common.wanpipe_work, (void *)fr_bh, dev); + + /* Allocate and initialize BH circular buffer */ + chan->bh_head = kmalloc((sizeof(bh_data_t)*MAX_BH_BUFF),GFP_ATOMIC); + memset(chan->bh_head,0,(sizeof(bh_data_t)*MAX_BH_BUFF)); + atomic_set(&chan->bh_buff_used, 0); + + netif_start_queue(dev); + + wanpipe_open(card); + do_gettimeofday( &tv ); + chan->router_start_time = tv.tv_sec; + + if (test_bit(0,&chan->config_dlci)){ + trigger_config_fr (card); + }else if (chan->inarp == INARP_REQUEST){ + trigger_fr_arp(dev); + } + + return err; +} + +/*============================================================================ + * Close network interface. + * o if this is the last open, then disable communications and interrupts. + * o reset flags. + */ +static int if_close(struct net_device* dev) +{ + fr_channel_t* chan = dev->priv; + sdla_t* card = chan->card; + + if (chan->inarp == INARP_CONFIGURED) { + chan->inarp = INARP_REQUEST; + } + + netif_stop_queue(dev); + wanpipe_close(card); + + return 0; +} + +/*============================================================================ + * Re-build media header. + * + * Return: 1 physical address resolved. + * 0 physical address not resolved + */ +static int if_rebuild_hdr (struct sk_buff* skb) +{ + struct net_device *dev = skb->dev; + fr_channel_t* chan = dev->priv; + sdla_t* card = chan->card; + + printk(KERN_INFO "%s: rebuild_header() called for interface %s!\n", + card->devname, dev->name); + return 1; +} + +/*============================================================================ + * Handle transmit timeout event from netif watchdog + */ +static void if_tx_timeout(struct net_device *dev) +{ + fr_channel_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. + */ + + chan->drvstats_if_send.if_send_tbusy++; + ++chan->ifstats.collisions; + + printk (KERN_INFO "%s: Transmit timed out on %s\n", + card->devname, dev->name); + chan->drvstats_if_send.if_send_tbusy_timeout++; + netif_wake_queue (dev); + +} + + +/*============================================================================ + * Send a packet on a network interface. + * o set tbusy flag (marks start of the transmission) to block a timer-based + * transmit from overlapping. + * o set critical flag when accessing board. + * o check link state. If link is not up, then drop the packet. + * o check channel status. If it's down then initiate a call. + * o pass a packet to corresponding WAN device. + * 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. Using netif_start_queue() and netif_stop_queue() + * 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) +{ + fr_channel_t* chan = dev->priv; + sdla_t* card = chan->card; + int err; + unsigned char *sendpacket; + fr508_flags_t* adptr_flags = card->flags; + int udp_type; + long delay_tx_queued = 0; + unsigned long smp_flags=0; + unsigned char attr = 0; + + chan->drvstats_if_send.if_send_entry++; + + 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); + chan->drvstats_if_send.if_send_skb_null ++; + + netif_wake_queue(dev); + return 0; + } + + /* If a peripheral task is running just drop packets */ + if (test_bit(PERI_CRIT, &card->wandev.critical)){ + + printk(KERN_INFO "%s: Critical in if_send(): Peripheral running!\n", + card->devname); + + dev_kfree_skb_any(skb); + netif_start_queue(dev); + return 0; + } + + /* We must set the 'tbusy' flag if we already have a packet queued for + transmission in the transmit interrupt handler. However, we must + ensure that the transmit interrupt does not reset the 'tbusy' flag + just before we set it, as this will result in a "transmit timeout". + */ + set_bit(SEND_TXIRQ_CRIT, (void*)&card->wandev.critical); + if(chan->transmit_length) { + netif_stop_queue(dev); + chan->tick_counter = jiffies; + clear_bit(SEND_TXIRQ_CRIT, (void*)&card->wandev.critical); + return 1; + } + clear_bit(SEND_TXIRQ_CRIT, (void*)&card->wandev.critical); + + /* Move the if_header() code to here. By inserting frame + * relay header in if_header() we would break the + * tcpdump and other packet sniffers */ + chan->fr_header_len = setup_fr_header(&skb,dev,chan->common.usedby); + if (chan->fr_header_len < 0 ){ + ++chan->ifstats.tx_dropped; + ++card->wandev.stats.tx_dropped; + + dev_kfree_skb_any(skb); + netif_start_queue(dev); + return 0; + } + + sendpacket = skb->data; + + udp_type = udp_pkt_type(skb, card); + + if(udp_type != UDP_INVALID_TYPE) { + if(store_udp_mgmt_pkt(udp_type, UDP_PKT_FRM_STACK, card, skb, + chan->dlci)) { + adptr_flags->imask |= FR_INTR_TIMER; + if (udp_type == UDP_FPIPE_TYPE){ + chan->drvstats_if_send. + if_send_PIPE_request ++; + } + } + netif_start_queue(dev); + return 0; + } + + //FIXME: can we do better than sendpacket[2]? + if ((chan->common.usedby == WANPIPE) && (sendpacket[2] == 0x45)) { + + /* check to see if the source IP address is a broadcast or */ + /* multicast IP address */ + if(chk_bcast_mcast_addr(card, dev, skb)){ + ++chan->ifstats.tx_dropped; + ++card->wandev.stats.tx_dropped; + dev_kfree_skb_any(skb); + netif_start_queue(dev); + return 0; + } + } + + + /* Lock the S514/S508 card: SMP Supported */ + s508_s514_lock(card,&smp_flags); + + if (test_and_set_bit(SEND_CRIT, (void*)&card->wandev.critical)) { + + chan->drvstats_if_send.if_send_critical_non_ISR ++; + chan->ifstats.tx_dropped ++; + printk(KERN_INFO "%s Critical in IF_SEND: if_send() already running!\n", + card->devname); + goto if_send_start_and_exit; + } + + /* API packet check: minimum packet size must be greater than + * 16 byte API header */ + if((chan->common.usedby == API) && (skb->len <= sizeof(api_tx_hdr_t))) { + ++chan->ifstats.tx_dropped; + ++card->wandev.stats.tx_dropped; + + + goto if_send_start_and_exit; + + }else{ + /* During API transmission, get rid of the API header */ + if (chan->common.usedby == API) { + api_tx_hdr_t* api_tx_hdr; + api_tx_hdr = (api_tx_hdr_t*)&skb->data[0x00]; + attr = api_tx_hdr->attr; + skb_pull(skb,sizeof(api_tx_hdr_t)); + } + } + + if (card->wandev.state != WAN_CONNECTED) { + chan->drvstats_if_send.if_send_wan_disconnected ++; + ++chan->ifstats.tx_dropped; + ++card->wandev.stats.tx_dropped; + + } else if (chan->common.state != WAN_CONNECTED) { + chan->drvstats_if_send.if_send_dlci_disconnected ++; + + /* Update the DLCI state in timer interrupt */ + card->u.f.timer_int_enabled |= TMR_INT_ENABLED_UPDATE_STATE; + adptr_flags->imask |= FR_INTR_TIMER; + + ++chan->ifstats.tx_dropped; + ++card->wandev.stats.tx_dropped; + + } else if (!is_tx_ready(card, chan)) { + /* No tx buffers available, store for delayed transmit */ + if (!setup_for_delayed_transmit(dev, skb)){ + set_bit(1,&delay_tx_queued); + } + chan->drvstats_if_send.if_send_no_bfrs++; + + } else if (!skb->protocol) { + /* No protocols drop packet */ + chan->drvstats_if_send.if_send_protocol_error ++; + ++card->wandev.stats.tx_errors; + + } else if (test_bit(ARP_CRIT,&card->wandev.critical)){ + /* We are trying to send an ARP Packet, block IP data until + * ARP is sent */ + ++chan->ifstats.tx_dropped; + ++card->wandev.stats.tx_dropped; + + } else { + //FIXME: IPX is not implemented in this version of Frame Relay ? + if((chan->common.usedby == WANPIPE) && + sendpacket[1] == 0x00 && + sendpacket[2] == 0x80 && + sendpacket[6] == 0x81 && + sendpacket[7] == 0x37) { + + if( chan->enable_IPX ) { + switch_net_numbers(sendpacket, + chan->network_number, 0); + } else { + //FIXME: Take this out when IPX is fixed + printk(KERN_INFO + "%s: WARNING: Unsupported IPX data in send, packet dropped\n", + card->devname); + } + + }else{ + err = fr_send_data_header(card, chan->dlci, attr, skb->len, skb->data, chan->fr_header_len); + if (err) { + switch(err) { + case FRRES_CIR_OVERFLOW: + case FRRES_BUFFER_OVERFLOW: + if (!setup_for_delayed_transmit(dev, skb)){ + set_bit(1,&delay_tx_queued); + } + chan->drvstats_if_send. + if_send_adptr_bfrs_full ++; + break; + + case FRRES_TOO_LONG: + if (net_ratelimit()){ + printk(KERN_INFO + "%s: Error: Frame too long, transmission failed %i\n", + card->devname, (unsigned int)skb->len); + } + /* Drop down to default */ + default: + chan->drvstats_if_send. + if_send_dlci_disconnected ++; + ++chan->ifstats.tx_dropped; + ++card->wandev.stats.tx_dropped; + break; + } + } else { + chan->drvstats_if_send. + if_send_bfr_passed_to_adptr++; + ++chan->ifstats.tx_packets; + ++card->wandev.stats.tx_packets; + + chan->ifstats.tx_bytes += skb->len; + card->wandev.stats.tx_bytes += skb->len; + dev->trans_start = jiffies; + } + } + } + +if_send_start_and_exit: + + netif_start_queue(dev); + + /* If we queued the packet for transmission, we must not + * deallocate it. The packet is unlinked from the IP stack + * not copied. Therefore, we must keep the original packet */ + if (!test_bit(1,&delay_tx_queued)) { + dev_kfree_skb_any(skb); + }else{ + adptr_flags->imask |= FR_INTR_TXRDY; + card->u.f.tx_interrupts_pending ++; + } + + clear_bit(SEND_CRIT, (void*)&card->wandev.critical); + + s508_s514_unlock(card,&smp_flags); + + return 0; +} + + + +/*============================================================================ + * Setup so that a frame can be transmitted on the occurrence of a transmit + * interrupt. + */ +static int setup_for_delayed_transmit(struct net_device* dev, + struct sk_buff *skb) +{ + fr_channel_t* chan = dev->priv; + sdla_t* card = chan->card; + fr_dlci_interface_t* dlci_interface; + int len = skb->len; + + /* Check that the dlci is properly configured, + * before using tx interrupt */ + if (!chan->dlci_int_interface){ + if (net_ratelimit()){ + printk(KERN_INFO + "%s: ERROR on DLCI %i: Not configured properly !\n", + card->devname, chan->dlci); + printk(KERN_INFO "%s: Please contact Sangoma Technologies\n", + card->devname); + } + return 1; + } + + dlci_interface = chan->dlci_int_interface; + + if(chan->transmit_length) { + printk(KERN_INFO "%s: Big mess in setup_for_del...\n", + card->devname); + return 1; + } + + if(len > FR_MAX_NO_DATA_BYTES_IN_FRAME) { + //FIXME: increment some statistic */ + return 1; + } + + skb_unlink(skb); + + chan->transmit_length = len; + chan->delay_skb = skb; + + dlci_interface->gen_interrupt |= FR_INTR_TXRDY; + dlci_interface->packet_length = len; + + /* Turn on TX interrupt at the end of if_send */ + return 0; +} + + +/*============================================================================ + * Check to see if the packet to be transmitted contains a broadcast or + * multicast source IP address. + * Return 0 if not broadcast/multicast address, otherwise return 1. + */ + +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; + fr_channel_t* chan = dev->priv; + + /* read the IP source address from the outgoing packet */ + src_ip_addr = *(u32 *)(skb->data + 14); + + /* 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((chan->mc == WANOPT_NO) && (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 nothing. + */ +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; + + + fr_udp_pkt_t *fr_udp_pkt = (fr_udp_pkt_t *)data; + + /* Set length of packet */ + len = //sizeof(fr_encap_hdr_t)+ + sizeof(ip_pkt_t)+ + sizeof(udp_pkt_t)+ + sizeof(wp_mgmt_t)+ + sizeof(cblock_t)+ + mbox_len; + + + /* fill in UDP reply */ + fr_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)+ + 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); + fr_udp_pkt->udp_pkt.udp_length = temp; + + /* swap UDP ports */ + temp = fr_udp_pkt->udp_pkt.udp_src_port; + fr_udp_pkt->udp_pkt.udp_src_port = + fr_udp_pkt->udp_pkt.udp_dst_port; + fr_udp_pkt->udp_pkt.udp_dst_port = temp; + + + + /* add UDP pseudo header */ + temp = 0x1100; + *((unsigned short *) + (fr_udp_pkt->data+mbox_len+even_bound)) = temp; + temp = (udp_length<<8)|(udp_length>>8); + *((unsigned short *) + (fr_udp_pkt->data+mbox_len+even_bound+2)) = temp; + + /* calculate UDP checksum */ + fr_udp_pkt->udp_pkt.udp_checksum = 0; + + fr_udp_pkt->udp_pkt.udp_checksum = + calc_checksum(&data[UDP_OFFSET/*+sizeof(fr_encap_hdr_t)*/], + udp_length+UDP_OFFSET); + + /* fill in IP length */ + ip_length = udp_length + sizeof(ip_pkt_t); + temp = (ip_length<<8)|(ip_length>>8); + fr_udp_pkt->ip_pkt.total_length = temp; + + /* swap IP addresses */ + ip_temp = fr_udp_pkt->ip_pkt.ip_src_address; + fr_udp_pkt->ip_pkt.ip_src_address = + fr_udp_pkt->ip_pkt.ip_dst_address; + fr_udp_pkt->ip_pkt.ip_dst_address = ip_temp; + + + /* fill in IP checksum */ + fr_udp_pkt->ip_pkt.hdr_checksum = 0; + fr_udp_pkt->ip_pkt.hdr_checksum = + calc_checksum(&data[/*sizeof(fr_encap_hdr_t)*/0], + 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; +} + +/* + If incoming is 0 (outgoing)- if the net numbers is ours make it 0 + if incoming is 1 - if the net number is 0 make it ours + +*/ +static void switch_net_numbers(unsigned char *sendpacket, unsigned long network_number, unsigned char incoming) +{ + unsigned long pnetwork_number; + + pnetwork_number = (unsigned long)((sendpacket[14] << 24) + + (sendpacket[15] << 16) + (sendpacket[16] << 8) + + sendpacket[17]); + + if (!incoming) { + /* If the destination network number is ours, make it 0 */ + if( pnetwork_number == network_number) { + sendpacket[14] = sendpacket[15] = sendpacket[16] = + sendpacket[17] = 0x00; + } + } else { + /* If the incoming network is 0, make it ours */ + if( pnetwork_number == 0) { + sendpacket[14] = (unsigned char)(network_number >> 24); + sendpacket[15] = (unsigned char)((network_number & + 0x00FF0000) >> 16); + sendpacket[16] = (unsigned char)((network_number & + 0x0000FF00) >> 8); + sendpacket[17] = (unsigned char)(network_number & + 0x000000FF); + } + } + + + pnetwork_number = (unsigned long)((sendpacket[26] << 24) + + (sendpacket[27] << 16) + (sendpacket[28] << 8) + + sendpacket[29]); + + if( !incoming ) { + /* If the source network is ours, make it 0 */ + if( pnetwork_number == network_number) { + sendpacket[26] = sendpacket[27] = sendpacket[28] = + sendpacket[29] = 0x00; + } + } else { + /* If the source network is 0, make it ours */ + if( pnetwork_number == 0 ) { + sendpacket[26] = (unsigned char)(network_number >> 24); + sendpacket[27] = (unsigned char)((network_number & + 0x00FF0000) >> 16); + sendpacket[28] = (unsigned char)((network_number & + 0x0000FF00) >> 8); + sendpacket[29] = (unsigned char)(network_number & + 0x000000FF); + } + } +} /* switch_net_numbers */ + +/*============================================================================ + * Get ethernet-style interface statistics. + * Return a pointer to struct enet_statistics. + */ +static struct net_device_stats *if_stats(struct net_device *dev) +{ + fr_channel_t* chan = dev->priv; + + if(chan == NULL) + return NULL; + + return &chan->ifstats; +} + +/****** Interrupt Handlers **************************************************/ + +/*============================================================================ + * fr_isr: S508 frame relay interrupt service routine. + * + * Description: + * Frame relay main interrupt service route. This + * function check the interrupt type and takes + * the appropriate action. + */ +static void fr_isr (sdla_t* card) +{ + fr508_flags_t* flags = card->flags; + char *ptr = &flags->iflag; + int i,err; + fr_mbox_t* mbox = card->mbox; + + /* This flag prevents nesting of interrupts. See sdla_isr() routine + * in sdlamain.c. */ + card->in_isr = 1; + + ++card->statistics.isr_entry; + + + /* All peripheral (configuraiton, re-configuration) events + * take presidence over the ISR. Thus, retrigger */ + if (test_bit(PERI_CRIT, (void*)&card->wandev.critical)) { + ++card->statistics.isr_already_critical; + goto fr_isr_exit; + } + + if(card->hw.type != SDLA_S514) { + if (test_bit(SEND_CRIT, (void*)&card->wandev.critical)) { + printk(KERN_INFO "%s: Critical while in ISR: If Send Running!\n", + card->devname); + ++card->statistics.isr_already_critical; + goto fr_isr_exit; + } + } + + switch (flags->iflag) { + + case FR_INTR_RXRDY: /* receive interrupt */ + ++card->statistics.isr_rx; + rx_intr(card); + break; + + + case FR_INTR_TXRDY: /* transmit interrupt */ + ++ card->statistics.isr_tx; + tx_intr(card); + break; + + case FR_INTR_READY: + Intr_test_counter++; + ++card->statistics.isr_intr_test; + break; + + case FR_INTR_DLC: /* Event interrupt occurred */ + mbox->cmd.command = FR_READ_STATUS; + mbox->cmd.length = 0; + err = sdla_exec(mbox) ? mbox->cmd.result : CMD_TIMEOUT; + if (err) + fr_event(card, err, mbox); + break; + + case FR_INTR_TIMER: /* Timer interrupt */ + timer_intr(card); + break; + + default: + ++card->statistics.isr_spurious; + spur_intr(card); + printk(KERN_INFO "%s: Interrupt Type 0x%02X!\n", + card->devname, flags->iflag); + + printk(KERN_INFO "%s: ID Bytes = ",card->devname); + for(i = 0; i < 8; i ++) + printk(KERN_INFO "0x%02X ", *(ptr + 0x28 + i)); + printk(KERN_INFO "\n"); + + break; + } + +fr_isr_exit: + + card->in_isr = 0; + flags->iflag = 0; + return; +} + + + +/*=========================================================== + * rx_intr Receive interrupt handler. + * + * Description + * Upon receiveing an interrupt: + * 1. Check that the firmware is in sync with + * the driver. + * 2. Find an appropriate network interface + * based on the received dlci number. + * 3. Check that the netowrk interface exists + * and that it's setup properly. + * 4. Copy the data into an skb buffer. + * 5. Check the packet type and take + * appropriate acton: UPD, API, ARP or Data. + */ + +static void rx_intr (sdla_t* card) +{ + fr_rx_buf_ctl_t* frbuf = card->rxmb; + fr508_flags_t* flags = card->flags; + fr_channel_t* chan; + char *ptr = &flags->iflag; + struct sk_buff* skb; + struct net_device* dev; + void* buf; + unsigned dlci, len, offs, len_incl_hdr; + int i, udp_type; + + + /* Check that firmware buffers are in sync */ + if (frbuf->flag != 0x01) { + + printk(KERN_INFO + "%s: corrupted Rx buffer @ 0x%X, flag = 0x%02X!\n", + card->devname, (unsigned)frbuf, frbuf->flag); + + printk(KERN_INFO "%s: ID Bytes = ",card->devname); + for(i = 0; i < 8; i ++) + printk(KERN_INFO "0x%02X ", *(ptr + 0x28 + i)); + printk(KERN_INFO "\n"); + + ++card->statistics.rx_intr_corrupt_rx_bfr; + + /* Bug Fix: Mar 6 2000 + * If we get a corrupted mailbox, it means 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"); + fr_set_intr_mode(card, 0, 0, 0); + return; + } + + len = frbuf->length; + dlci = frbuf->dlci; + offs = frbuf->offset; + + /* Find the network interface for this packet */ + dev = find_channel(card, dlci); + + + /* Check that the network interface is active and + * properly setup */ + if (dev == NULL) { + if( net_ratelimit()) { + printk(KERN_INFO "%s: received data on unconfigured DLCI %d!\n", + card->devname, dlci); + } + ++card->statistics.rx_intr_on_orphaned_DLCI; + ++card->wandev.stats.rx_dropped; + goto rx_done; + } + + if ((chan = dev->priv) == NULL){ + if( net_ratelimit()) { + printk(KERN_INFO "%s: received data on unconfigured DLCI %d!\n", + card->devname, dlci); + } + ++card->statistics.rx_intr_on_orphaned_DLCI; + ++card->wandev.stats.rx_dropped; + goto rx_done; + } + + skb = dev_alloc_skb(len); + + if (!netif_running(dev) || (skb == NULL)){ + + ++chan->ifstats.rx_dropped; + + if(skb == NULL) { + if (net_ratelimit()) { + printk(KERN_INFO + "%s: no socket buffers available!\n", + card->devname); + } + chan->drvstats_rx_intr.rx_intr_no_socket ++; + } + + if (!netif_running(dev)){ + chan->drvstats_rx_intr. + rx_intr_dev_not_started ++; + if (skb){ + dev_kfree_skb_any(skb); + } + } + goto rx_done; + } + + /* Copy data from the board into the socket buffer */ + if ((offs + len) > card->u.f.rx_top + 1) { + unsigned tmp = card->u.f.rx_top - offs + 1; + + buf = skb_put(skb, tmp); + sdla_peek(&card->hw, offs, buf, tmp); + offs = card->u.f.rx_base; + len -= tmp; + } + + buf = skb_put(skb, len); + sdla_peek(&card->hw, offs, buf, len); + + + /* We got the packet from the bard. + * Check the packet type and take appropriate action */ + + udp_type = udp_pkt_type( skb, card ); + + if(udp_type != UDP_INVALID_TYPE) { + + /* UDP Debug packet received, store the + * packet and handle it in timer interrupt */ + + skb_pull(skb, 1); + if (wanrouter_type_trans(skb, dev)){ + if(store_udp_mgmt_pkt(udp_type,UDP_PKT_FRM_NETWORK,card,skb,dlci)){ + + flags->imask |= FR_INTR_TIMER; + + if (udp_type == UDP_FPIPE_TYPE){ + ++chan->drvstats_rx_intr.rx_intr_PIPE_request; + } + } + } + + }else if (chan->common.usedby == API) { + + /* We are in API mode. + * Add an API header to the RAW packet + * and queue it into a circular buffer. + * Then kick the fr_bh() bottom half handler */ + + api_rx_hdr_t* api_rx_hdr; + chan->drvstats_rx_intr.rx_intr_bfr_passed_to_stack ++; + chan->ifstats.rx_packets ++; + card->wandev.stats.rx_packets ++; + + chan->ifstats.rx_bytes += skb->len; + card->wandev.stats.rx_bytes += skb->len; + + skb_push(skb, sizeof(api_rx_hdr_t)); + api_rx_hdr = (api_rx_hdr_t*)&skb->data[0x00]; + api_rx_hdr->attr = frbuf->attr; + api_rx_hdr->time_stamp = frbuf->tmstamp; + + skb->protocol = htons(ETH_P_IP); + skb->mac.raw = skb->data; + skb->dev = dev; + skb->pkt_type = WAN_PACKET_DATA; + + bh_enqueue(dev, skb); + + trigger_fr_bh(chan); + + }else if (handle_IPXWAN(skb->data,chan->name,chan->enable_IPX, chan->network_number)){ + + //FIXME: Frame Relay IPX is not supported, Yet ! + //if (chan->enable_IPX) { + // fr_send(card, dlci, 0, skb->len,skb->data); + //} + dev_kfree_skb_any(skb); + + } else if (is_arp(skb->data)) { + + /* ARP support enabled Mar 16 2000 + * Process incoming ARP reply/request, setup + * dynamic routes. */ + + if (process_ARP((arphdr_1490_t *)skb->data, card, dev)) { + if (net_ratelimit()){ + printk (KERN_INFO + "%s: Error processing ARP Packet.\n", + card->devname); + } + } + dev_kfree_skb_any(skb); + + } else if (skb->data[0] != 0x03) { + + if (net_ratelimit()) { + printk(KERN_INFO "%s: Non IETF packet discarded.\n", + card->devname); + } + dev_kfree_skb_any(skb); + + } else { + + len_incl_hdr = skb->len; + /* Decapsulate packet and pass it up the + protocol stack */ + skb->dev = dev; + + if (chan->common.usedby == BRIDGE || chan->common.usedby == BRIDGE_NODE){ + + /* Make sure it's an Ethernet frame, otherwise drop it */ + if (!memcmp(skb->data, "\x03\x00\x80\x00\x80\xC2\x00\x07", 8)) { + skb_pull(skb, 8); + skb->protocol=eth_type_trans(skb,dev); + }else{ + ++chan->drvstats_rx_intr.rx_intr_bfr_not_passed_to_stack; + ++chan->ifstats.rx_errors; + ++card->wandev.stats.rx_errors; + goto rx_done; + } + }else{ + + /* remove hardware header */ + buf = skb_pull(skb, 1); + + if (!wanrouter_type_trans(skb, dev)) { + + /* can't decapsulate packet */ + dev_kfree_skb_any(skb); + + ++chan->drvstats_rx_intr.rx_intr_bfr_not_passed_to_stack; + ++chan->ifstats.rx_errors; + ++card->wandev.stats.rx_errors; + goto rx_done; + } + skb->mac.raw = skb->data; + } + + + /* Send a packet up the IP stack */ + skb->dev->last_rx = jiffies; + netif_rx(skb); + ++chan->drvstats_rx_intr.rx_intr_bfr_passed_to_stack; + ++chan->ifstats.rx_packets; + ++card->wandev.stats.rx_packets; + + chan->ifstats.rx_bytes += len_incl_hdr; + card->wandev.stats.rx_bytes += len_incl_hdr; + } + +rx_done: + + /* Release buffer element and calculate a pointer to the next one */ + frbuf->flag = 0; + card->rxmb = ++frbuf; + if ((void*)frbuf > card->u.f.rxmb_last) + card->rxmb = card->u.f.rxmb_base; + +} + +/*================================================================== + * tx_intr: Transmit interrupt handler. + * + * Rationale: + * If the board is busy transmitting, if_send() will + * buffers a single packet and turn on + * the tx interrupt. Tx interrupt will be called + * by the board, once the firmware can send more + * data. Thus, no polling is required. + * + * Description: + * Tx interrupt is called for each + * configured dlci channel. Thus: + * 1. Obtain the netowrk interface based on the + * dlci number. + * 2. Check that network interface is up and + * properly setup. + * 3. Check for a buffered packet. + * 4. Transmit the packet. + * 5. If we are in WANPIPE mode, mark the + * NET_BH handler. + * 6. If we are in API mode, kick + * the AF_WANPIPE socket for more data. + * + */ +static void tx_intr(sdla_t *card) +{ + fr508_flags_t* flags = card->flags; + fr_tx_buf_ctl_t* bctl; + struct net_device* dev; + fr_channel_t* chan; + + if(card->hw.type == SDLA_S514){ + bctl = (void*)(flags->tse_offs + card->hw.dpmbase); + }else{ + bctl = (void*)(flags->tse_offs - FR_MB_VECTOR + + card->hw.dpmbase); + } + + /* Find the structure and make it unbusy */ + dev = find_channel(card, flags->dlci); + if (dev == NULL){ + printk(KERN_INFO "NO DEV IN TX Interrupt\n"); + goto end_of_tx_intr; + } + + if ((chan = dev->priv) == NULL){ + printk(KERN_INFO "NO CHAN IN TX Interrupt\n"); + goto end_of_tx_intr; + } + + if(!chan->transmit_length || !chan->delay_skb) { + printk(KERN_INFO "%s: tx int error - transmit length zero\n", + card->wandev.name); + goto end_of_tx_intr; + } + + /* If the 'if_send()' procedure is currently checking the 'tbusy' + status, then we cannot transmit. Instead, we configure the microcode + so as to re-issue this transmit interrupt at a later stage. + */ + if (test_bit(SEND_TXIRQ_CRIT, (void*)&card->wandev.critical)) { + + fr_dlci_interface_t* dlci_interface = chan->dlci_int_interface; + bctl->flag = 0xA0; + dlci_interface->gen_interrupt |= FR_INTR_TXRDY; + return; + + }else{ + bctl->dlci = flags->dlci; + bctl->length = chan->transmit_length+chan->fr_header_len; + sdla_poke(&card->hw, + fr_send_hdr(card,bctl->dlci,bctl->offset), + chan->delay_skb->data, + chan->delay_skb->len); + bctl->flag = 0xC0; + + ++chan->ifstats.tx_packets; + ++card->wandev.stats.tx_packets; + chan->ifstats.tx_bytes += chan->transmit_length; + card->wandev.stats.tx_bytes += chan->transmit_length; + + /* We must free an sk buffer, which we used + * for delayed transmission; Otherwise, the sock + * will run out of memory */ + dev_kfree_skb_any(chan->delay_skb); + + chan->delay_skb = NULL; + chan->transmit_length = 0; + + dev->trans_start = jiffies; + + if (netif_queue_stopped(dev)){ + /* If using API, than wakeup socket BH handler */ + if (chan->common.usedby == API){ + netif_start_queue(dev); + wakeup_sk_bh(dev); + }else{ + netif_wake_queue(dev); + } + } + } + +end_of_tx_intr: + + /* if any other interfaces have transmit interrupts pending, + * do not disable the global transmit interrupt */ + if(!(-- card->u.f.tx_interrupts_pending)) + flags->imask &= ~FR_INTR_TXRDY; + + +} + + +/*============================================================================ + * timer_intr: Timer interrupt handler. + * + * Rationale: + * All commans must be executed within the timer + * interrupt since no two commands should execute + * at the same time. + * + * Description: + * The timer interrupt is used to: + * 1. Processing udp calls from 'fpipemon'. + * 2. Processing update calls from /proc file system + * 3. Reading board-level statistics for + * updating the proc file system. + * 4. Sending inverse ARP request packets. + * 5. Configure a dlci/channel. + * 6. Unconfigure a dlci/channel. (Node only) + */ + +static void timer_intr(sdla_t *card) +{ + fr508_flags_t* flags = card->flags; + + /* UDP Debuging: fpipemon call */ + if (card->u.f.timer_int_enabled & TMR_INT_ENABLED_UDP) { + if(card->u.f.udp_type == UDP_FPIPE_TYPE) { + if(process_udp_mgmt_pkt(card)) { + card->u.f.timer_int_enabled &= + ~TMR_INT_ENABLED_UDP; + } + } + } + + /* /proc update call : triggered from update() */ + if (card->u.f.timer_int_enabled & TMR_INT_ENABLED_UPDATE) { + fr_get_err_stats(card); + fr_get_stats(card); + card->u.f.update_comms_stats = 0; + card->u.f.timer_int_enabled &= ~TMR_INT_ENABLED_UPDATE; + } + + /* Update the channel state call. This is call is + * triggered by if_send() function */ + if (card->u.f.timer_int_enabled & TMR_INT_ENABLED_UPDATE_STATE){ + struct net_device *dev; + if (card->wandev.state == WAN_CONNECTED){ + for (dev = card->wandev.dev; dev; + dev = *((struct net_device **)dev->priv)){ + fr_channel_t *chan = dev->priv; + if (chan->common.state != WAN_CONNECTED){ + update_chan_state(dev); + } + } + } + card->u.f.timer_int_enabled &= ~TMR_INT_ENABLED_UPDATE_STATE; + } + + /* configure a dlci/channel */ + if (card->u.f.timer_int_enabled & TMR_INT_ENABLED_CONFIG){ + config_fr(card); + card->u.f.timer_int_enabled &= ~TMR_INT_ENABLED_CONFIG; + } + + /* unconfigure a dlci/channel */ + if (card->u.f.timer_int_enabled & TMR_INT_ENABLED_UNCONFIG){ + unconfig_fr(card); + card->u.f.timer_int_enabled &= ~TMR_INT_ENABLED_UNCONFIG; + } + + + /* Transmit ARP packets */ + if (card->u.f.timer_int_enabled & TMR_INT_ENABLED_ARP){ + int i=0; + struct net_device *dev; + + if (card->u.f.arp_dev == NULL) + card->u.f.arp_dev = card->wandev.dev; + + dev = card->u.f.arp_dev; + + for (;;){ + + fr_channel_t *chan = dev->priv; + + /* If the interface is brought down cancel sending In-ARPs */ + if (!(dev->flags&IFF_UP)){ + clear_bit(0,&chan->inarp_ready); + } + + if (test_bit(0,&chan->inarp_ready)){ + + if (check_tx_status(card,dev)){ + set_bit(ARP_CRIT,&card->wandev.critical); + break; + } + + if (!send_inarp_request(card,dev)){ + trigger_fr_arp(dev); + chan->inarp_tick = jiffies; + } + + clear_bit(0,&chan->inarp_ready); + dev = move_dev_to_next(card,dev); + break; + } + dev = move_dev_to_next(card,dev); + + if (++i == card->wandev.new_if_cnt){ + card->u.f.timer_int_enabled &= ~TMR_INT_ENABLED_ARP; + break; + } + } + card->u.f.arp_dev = dev; + } + + if(!card->u.f.timer_int_enabled) + flags->imask &= ~FR_INTR_TIMER; +} + + +/*============================================================================ + * spur_intr: Spurious interrupt handler. + * + * Description: + * We don't know this interrupt. + * Print a warning. + */ + +static void spur_intr (sdla_t* card) +{ + if (net_ratelimit()){ + printk(KERN_INFO "%s: spurious interrupt!\n", card->devname); + } +} + + +//FIXME: Fix the IPX in next version +/*=========================================================================== + * Return 0 for non-IPXWAN packet + * 1 for IPXWAN packet or IPX is not enabled! + * FIXME: Use a IPX structure here not offsets + */ +static int handle_IPXWAN(unsigned char *sendpacket, + char *devname, unsigned char enable_IPX, + unsigned long network_number) +{ + int i; + + if( sendpacket[1] == 0x00 && sendpacket[2] == 0x80 && + sendpacket[6] == 0x81 && sendpacket[7] == 0x37) { + + /* It's an IPX packet */ + if (!enable_IPX){ + /* Return 1 so we don't pass it up the stack. */ + //FIXME: Take this out when IPX is fixed + if (net_ratelimit()){ + printk (KERN_INFO + "%s: WARNING: Unsupported IPX packet received and dropped\n", + devname); + } + return 1; + } + } else { + /* It's not IPX so return and pass it up the stack. */ + return 0; + } + + if( sendpacket[24] == 0x90 && sendpacket[25] == 0x04){ + /* It's IPXWAN */ + + if( sendpacket[10] == 0x02 && sendpacket[42] == 0x00){ + + /* It's a timer request packet */ + printk(KERN_INFO "%s: Received IPXWAN Timer Request packet\n", + devname); + + /* Go through the routing options and answer no to every + * option except Unnumbered RIP/SAP + */ + for(i = 49; sendpacket[i] == 0x00; i += 5){ + /* 0x02 is the option for Unnumbered RIP/SAP */ + if( sendpacket[i + 4] != 0x02){ + sendpacket[i + 1] = 0; + } + } + + /* Skip over the extended Node ID option */ + if( sendpacket[i] == 0x04 ){ + i += 8; + } + + /* We also want to turn off all header compression opt. + */ + for(; sendpacket[i] == 0x80 ;){ + sendpacket[i + 1] = 0; + i += (sendpacket[i + 2] << 8) + (sendpacket[i + 3]) + 4; + } + + /* Set the packet type to timer response */ + sendpacket[42] = 0x01; + + printk(KERN_INFO "%s: Sending IPXWAN Timer Response\n", + devname); + + } else if( sendpacket[42] == 0x02 ){ + + /* This is an information request packet */ + printk(KERN_INFO + "%s: Received IPXWAN Information Request packet\n", + devname); + + /* Set the packet type to information response */ + sendpacket[42] = 0x03; + + /* Set the router name */ + sendpacket[59] = 'F'; + sendpacket[60] = 'P'; + sendpacket[61] = 'I'; + sendpacket[62] = 'P'; + sendpacket[63] = 'E'; + sendpacket[64] = '-'; + sendpacket[65] = CVHexToAscii(network_number >> 28); + sendpacket[66] = CVHexToAscii((network_number & 0x0F000000)>> 24); + sendpacket[67] = CVHexToAscii((network_number & 0x00F00000)>> 20); + sendpacket[68] = CVHexToAscii((network_number & 0x000F0000)>> 16); + sendpacket[69] = CVHexToAscii((network_number & 0x0000F000)>> 12); + sendpacket[70] = CVHexToAscii((network_number & 0x00000F00)>> 8); + sendpacket[71] = CVHexToAscii((network_number & 0x000000F0)>> 4); + sendpacket[72] = CVHexToAscii(network_number & 0x0000000F); + for(i = 73; i < 107; i+= 1) + { + sendpacket[i] = 0; + } + + printk(KERN_INFO "%s: Sending IPXWAN Information Response packet\n", + devname); + } else { + + printk(KERN_INFO "%s: Unknown IPXWAN packet!\n",devname); + return 0; + } + + /* Set the WNodeID to our network address */ + sendpacket[43] = (unsigned char)(network_number >> 24); + sendpacket[44] = (unsigned char)((network_number & 0x00FF0000) >> 16); + sendpacket[45] = (unsigned char)((network_number & 0x0000FF00) >> 8); + sendpacket[46] = (unsigned char)(network_number & 0x000000FF); + + return 1; + } + + /* If we get here, it's an IPX-data packet so it'll get passed up the + * stack. + * switch the network numbers + */ + switch_net_numbers(sendpacket, network_number ,1); + return 0; +} +/*============================================================================ + * process_route + * + * Rationale: + * If the interface goes down, or we receive an ARP request, + * we have to change the network interface ip addresses. + * This cannot be done within the interrupt. + * + * Description: + * + * This routine is called as a polling routine to dynamically + * add/delete routes negotiated by inverse ARP. It is in this + * "task" because we don't want routes to be added while in + * interrupt context. + * + * Usage: + * This function is called by fr_poll() polling funtion. + */ + +static void process_route(struct net_device *dev) +{ + fr_channel_t *chan = dev->priv; + sdla_t *card = chan->card; + + struct ifreq if_info; + struct sockaddr_in *if_data; + mm_segment_t fs = get_fs(); + u32 ip_tmp; + int err; + + + switch(chan->route_flag){ + + case ADD_ROUTE: + + /* Set remote addresses */ + memset(&if_info, 0, sizeof(if_info)); + strcpy(if_info.ifr_name, dev->name); + + set_fs(get_ds()); /* get user space block */ + + if_data = (struct sockaddr_in *)&if_info.ifr_dstaddr; + if_data->sin_addr.s_addr = chan->ip_remote; + if_data->sin_family = AF_INET; + err = devinet_ioctl( SIOCSIFDSTADDR, &if_info ); + + set_fs(fs); /* restore old block */ + + if (err) { + printk(KERN_INFO + "%s: Route Add failed. Error: %d\n", + card->devname,err); + printk(KERN_INFO "%s: Address: %u.%u.%u.%u\n", + chan->name, NIPQUAD(chan->ip_remote)); + + }else { + printk(KERN_INFO "%s: Route Added Successfully: %u.%u.%u.%u\n", + card->devname,NIPQUAD(chan->ip_remote)); + chan->route_flag = ROUTE_ADDED; + } + break; + + case REMOVE_ROUTE: + + /* Set remote addresses */ + memset(&if_info, 0, sizeof(if_info)); + strcpy(if_info.ifr_name, dev->name); + + ip_tmp = get_ip_address(dev,WAN_POINTOPOINT_IP); + + set_fs(get_ds()); /* get user space block */ + + if_data = (struct sockaddr_in *)&if_info.ifr_dstaddr; + if_data->sin_addr.s_addr = 0; + if_data->sin_family = AF_INET; + err = devinet_ioctl( SIOCSIFDSTADDR, &if_info ); + + set_fs(fs); + + if (err) { + printk(KERN_INFO + "%s: Deleting of route failed. Error: %d\n", + card->devname,err); + printk(KERN_INFO "%s: Address: %u.%u.%u.%u\n", + dev->name,NIPQUAD(chan->ip_remote) ); + + } else { + printk(KERN_INFO "%s: Route Removed Sucessfuly: %u.%u.%u.%u\n", + card->devname,NIPQUAD(ip_tmp)); + chan->route_flag = NO_ROUTE; + } + break; + + } /* Case Statement */ + +} + + + +/****** Frame Relay Firmware-Specific Functions *****************************/ + +/*============================================================================ + * Read firmware code version. + * o fill string str with firmware version info. + */ +static int fr_read_version (sdla_t* card, char* str) +{ + fr_mbox_t* mbox = card->mbox; + int retry = MAX_CMD_RETRY; + int err; + + do + { + mbox->cmd.command = FR_READ_CODE_VERSION; + mbox->cmd.length = 0; + err = sdla_exec(mbox) ? mbox->cmd.result : CMD_TIMEOUT; + } while (err && retry-- && fr_event(card, err, mbox)); + + if (!err && str) { + int len = mbox->cmd.length; + memcpy(str, mbox->data, len); + str[len] = '\0'; + } + return err; +} + +/*============================================================================ + * Set global configuration. + */ +static int fr_configure (sdla_t* card, fr_conf_t *conf) +{ + fr_mbox_t* mbox = card->mbox; + int retry = MAX_CMD_RETRY; + int dlci_num = card->u.f.dlci_num; + int err, i; + + do + { + memcpy(mbox->data, conf, sizeof(fr_conf_t)); + + if (dlci_num) for (i = 0; i < dlci_num; ++i) + ((fr_conf_t*)mbox->data)->dlci[i] = + card->u.f.node_dlci[i]; + + mbox->cmd.command = FR_SET_CONFIG; + mbox->cmd.length = + sizeof(fr_conf_t) + dlci_num * sizeof(short); + + err = sdla_exec(mbox) ? mbox->cmd.result : CMD_TIMEOUT; + + } while (err && retry-- && fr_event(card, err, mbox)); + + /*NC Oct 12 2000 */ + if (err != CMD_OK){ + printk(KERN_ERR "%s: Frame Relay Configuration Failed: rc=0x%x\n", + card->devname,err); + } + + return err; +} + +/*============================================================================ + * Set DLCI configuration. + */ +static int fr_dlci_configure (sdla_t* card, fr_dlc_conf_t *conf, unsigned dlci) +{ + fr_mbox_t* mbox = card->mbox; + int retry = MAX_CMD_RETRY; + int err; + + do + { + memcpy(mbox->data, conf, sizeof(fr_dlc_conf_t)); + mbox->cmd.dlci = (unsigned short) dlci; + mbox->cmd.command = FR_SET_CONFIG; + mbox->cmd.length = sizeof(fr_dlc_conf_t); + err = sdla_exec(mbox) ? mbox->cmd.result : CMD_TIMEOUT; + } while (err && retry--); + + return err; +} +/*============================================================================ + * Set interrupt mode. + */ +static int fr_set_intr_mode (sdla_t* card, unsigned mode, unsigned mtu, + unsigned short timeout) +{ + fr_mbox_t* mbox = card->mbox; + fr508_intr_ctl_t* ictl = (void*)mbox->data; + int retry = MAX_CMD_RETRY; + int err; + + do + { + memset(ictl, 0, sizeof(fr508_intr_ctl_t)); + ictl->mode = mode; + ictl->tx_len = mtu; + ictl->irq = card->hw.irq; + + /* indicate timeout on timer */ + if (mode & 0x20) ictl->timeout = timeout; + + mbox->cmd.length = sizeof(fr508_intr_ctl_t); + mbox->cmd.command = FR_SET_INTR_MODE; + err = sdla_exec(mbox) ? mbox->cmd.result : CMD_TIMEOUT; + + } while (err && retry-- && fr_event(card, err, mbox)); + + return err; +} + +/*============================================================================ + * Enable communications. + */ +static int fr_comm_enable (sdla_t* card) +{ + fr_mbox_t* mbox = card->mbox; + int retry = MAX_CMD_RETRY; + int err; + + do + { + mbox->cmd.command = FR_COMM_ENABLE; + mbox->cmd.length = 0; + err = sdla_exec(mbox) ? mbox->cmd.result : CMD_TIMEOUT; + } while (err && retry-- && fr_event(card, err, mbox)); + + return err; +} + +/*============================================================================ + * fr_comm_disable + * + * Warning: This functin is called by the shutdown() procedure. It is void + * since dev->priv are has already been deallocated and no + * error checking is possible using fr_event() function. + */ +static void fr_comm_disable (sdla_t* card) +{ + fr_mbox_t* mbox = card->mbox; + int retry = MAX_CMD_RETRY; + int err; + + do { + mbox->cmd.command = FR_SET_MODEM_STATUS; + mbox->cmd.length = 1; + mbox->data[0] = 0; + err = sdla_exec(mbox) ? mbox->cmd.result : CMD_TIMEOUT; + } while (err && retry--); + + retry = MAX_CMD_RETRY; + + do + { + mbox->cmd.command = FR_COMM_DISABLE; + mbox->cmd.length = 0; + err = sdla_exec(mbox) ? mbox->cmd.result : CMD_TIMEOUT; + } while (err && retry--); + + return; +} + + + +/*============================================================================ + * Get communications error statistics. + */ +static int fr_get_err_stats (sdla_t* card) +{ + fr_mbox_t* mbox = card->mbox; + int retry = MAX_CMD_RETRY; + int err; + + + do + { + mbox->cmd.command = FR_READ_ERROR_STATS; + mbox->cmd.length = 0; + mbox->cmd.dlci = 0; + err = sdla_exec(mbox) ? mbox->cmd.result : CMD_TIMEOUT; + } while (err && retry-- && fr_event(card, err, mbox)); + + if (!err) { + fr_comm_stat_t* stats = (void*)mbox->data; + card->wandev.stats.rx_over_errors = stats->rx_overruns; + card->wandev.stats.rx_crc_errors = stats->rx_bad_crc; + card->wandev.stats.rx_missed_errors = stats->rx_aborts; + card->wandev.stats.rx_length_errors = stats->rx_too_long; + card->wandev.stats.tx_aborted_errors = stats->tx_aborts; + + } + + return err; +} + +/*============================================================================ + * Get statistics. + */ +static int fr_get_stats (sdla_t* card) +{ + fr_mbox_t* mbox = card->mbox; + int retry = MAX_CMD_RETRY; + int err; + + + do + { + mbox->cmd.command = FR_READ_STATISTICS; + mbox->cmd.length = 0; + mbox->cmd.dlci = 0; + err = sdla_exec(mbox) ? mbox->cmd.result : CMD_TIMEOUT; + } while (err && retry-- && fr_event(card, err, mbox)); + + if (!err) { + fr_link_stat_t* stats = (void*)mbox->data; + card->wandev.stats.rx_frame_errors = stats->rx_bad_format; + card->wandev.stats.rx_dropped = + stats->rx_dropped + stats->rx_dropped2; + } + + return err; +} + +/*============================================================================ + * Add DLCI(s) (Access Node only!). + * This routine will perform the ADD_DLCIs command for the specified DLCI. + */ +static int fr_add_dlci (sdla_t* card, int dlci) +{ + fr_mbox_t* mbox = card->mbox; + int retry = MAX_CMD_RETRY; + int err; + + do + { + unsigned short* dlci_list = (void*)mbox->data; + + mbox->cmd.length = sizeof(short); + dlci_list[0] = dlci; + mbox->cmd.command = FR_ADD_DLCI; + err = sdla_exec(mbox) ? mbox->cmd.result : CMD_TIMEOUT; + + } while (err && retry-- && fr_event(card, err, mbox)); + + return err; +} + +/*============================================================================ + * Activate DLCI(s) (Access Node only!). + * This routine will perform the ACTIVATE_DLCIs command with a DLCI number. + */ +static int fr_activate_dlci (sdla_t* card, int dlci) +{ + fr_mbox_t* mbox = card->mbox; + int retry = MAX_CMD_RETRY; + int err; + + do + { + unsigned short* dlci_list = (void*)mbox->data; + + mbox->cmd.length = sizeof(short); + dlci_list[0] = dlci; + mbox->cmd.command = FR_ACTIVATE_DLCI; + err = sdla_exec(mbox) ? mbox->cmd.result : CMD_TIMEOUT; + + } while (err && retry-- && fr_event(card, err, mbox)); + + return err; +} + +/*============================================================================ + * Delete DLCI(s) (Access Node only!). + * This routine will perform the DELETE_DLCIs command with a DLCI number. + */ +static int fr_delete_dlci (sdla_t* card, int dlci) +{ + fr_mbox_t* mbox = card->mbox; + int retry = MAX_CMD_RETRY; + int err; + + do + { + unsigned short* dlci_list = (void*)mbox->data; + + mbox->cmd.length = sizeof(short); + dlci_list[0] = dlci; + mbox->cmd.command = FR_DELETE_DLCI; + err = sdla_exec(mbox) ? mbox->cmd.result : CMD_TIMEOUT; + + } while (err && retry-- && fr_event(card, err, mbox)); + + return err; +} + + + +/*============================================================================ + * Issue in-channel signalling frame. + */ +static int fr_issue_isf (sdla_t* card, int isf) +{ + fr_mbox_t* mbox = card->mbox; + int retry = MAX_CMD_RETRY; + int err; + + do + { + mbox->data[0] = isf; + mbox->cmd.length = 1; + mbox->cmd.command = FR_ISSUE_IS_FRAME; + err = sdla_exec(mbox) ? mbox->cmd.result : CMD_TIMEOUT; + } while (err && retry-- && fr_event(card, err, mbox)); + + return err; +} + + +static unsigned int fr_send_hdr (sdla_t*card, int dlci, unsigned int offset) +{ + struct net_device *dev = find_channel(card,dlci); + fr_channel_t *chan; + + if (!dev || !(chan=dev->priv)) + return offset; + + if (chan->fr_header_len){ + sdla_poke(&card->hw, offset, chan->fr_header, chan->fr_header_len); + } + + return offset+chan->fr_header_len; +} + +/*============================================================================ + * Send a frame on a selected DLCI. + */ +static int fr_send_data_header (sdla_t* card, int dlci, unsigned char attr, int len, + void *buf, unsigned char hdr_len) +{ + fr_mbox_t* mbox = card->mbox + 0x800; + int retry = MAX_CMD_RETRY; + int err; + + do + { + mbox->cmd.dlci = dlci; + mbox->cmd.attr = attr; + mbox->cmd.length = len+hdr_len; + mbox->cmd.command = FR_WRITE; + err = sdla_exec(mbox) ? mbox->cmd.result : CMD_TIMEOUT; + } while (err && retry-- && fr_event(card, err, mbox)); + + if (!err) { + fr_tx_buf_ctl_t* frbuf; + + if(card->hw.type == SDLA_S514) + frbuf = (void*)(*(unsigned long*)mbox->data + + card->hw.dpmbase); + else + frbuf = (void*)(*(unsigned long*)mbox->data - + FR_MB_VECTOR + card->hw.dpmbase); + + sdla_poke(&card->hw, fr_send_hdr(card,dlci,frbuf->offset), buf, len); + frbuf->flag = 0x01; + } + + return err; +} + +static int fr_send (sdla_t* card, int dlci, unsigned char attr, int len, + void *buf) +{ + fr_mbox_t* mbox = card->mbox + 0x800; + int retry = MAX_CMD_RETRY; + int err; + + do + { + mbox->cmd.dlci = dlci; + mbox->cmd.attr = attr; + mbox->cmd.length = len; + mbox->cmd.command = FR_WRITE; + err = sdla_exec(mbox) ? mbox->cmd.result : CMD_TIMEOUT; + } while (err && retry-- && fr_event(card, err, mbox)); + + if (!err) { + fr_tx_buf_ctl_t* frbuf; + + if(card->hw.type == SDLA_S514) + frbuf = (void*)(*(unsigned long*)mbox->data + + card->hw.dpmbase); + else + frbuf = (void*)(*(unsigned long*)mbox->data - + FR_MB_VECTOR + card->hw.dpmbase); + + sdla_poke(&card->hw, frbuf->offset, buf, len); + frbuf->flag = 0x01; + } + + return err; +} + + +/****** Firmware Asynchronous Event Handlers ********************************/ + +/*============================================================================ + * Main asyncronous event/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 fr_event (sdla_t *card, int event, fr_mbox_t* mbox) +{ + fr508_flags_t* flags = card->flags; + char *ptr = &flags->iflag; + int i; + + switch (event) { + + case FRRES_MODEM_FAILURE: + return fr_modem_failure(card, mbox); + + case FRRES_CHANNEL_DOWN: { + struct net_device *dev; + + /* Remove all routes from associated DLCI's */ + for (dev = card->wandev.dev; dev; + dev = *((struct net_device **)dev->priv)) { + fr_channel_t *chan = dev->priv; + if (chan->route_flag == ROUTE_ADDED) { + chan->route_flag = REMOVE_ROUTE; + } + + if (chan->inarp == INARP_CONFIGURED) { + chan->inarp = INARP_REQUEST; + } + + /* If the link becomes disconnected then, + * all channels will be disconnected + * as well. + */ + set_chan_state(dev,WAN_DISCONNECTED); + } + + wanpipe_set_state(card, WAN_DISCONNECTED); + return 1; + } + + case FRRES_CHANNEL_UP: { + struct net_device *dev; + + /* FIXME: Only startup devices that are on the list */ + + for (dev = card->wandev.dev; dev; + dev = *((struct net_device **)dev->priv)) { + + set_chan_state(dev,WAN_CONNECTED); + } + + wanpipe_set_state(card, WAN_CONNECTED); + return 1; + } + + case FRRES_DLCI_CHANGE: + return fr_dlci_change(card, mbox); + + case FRRES_DLCI_MISMATCH: + printk(KERN_INFO "%s: DLCI list mismatch!\n", + card->devname); + return 1; + + case CMD_TIMEOUT: + printk(KERN_ERR "%s: command 0x%02X timed out!\n", + card->devname, mbox->cmd.command); + printk(KERN_INFO "%s: ID Bytes = ",card->devname); + for(i = 0; i < 8; i ++) + printk(KERN_INFO "0x%02X ", *(ptr + 0x18 + i)); + printk(KERN_INFO "\n"); + + break; + + case FRRES_DLCI_INACTIVE: + break; + + case FRRES_CIR_OVERFLOW: + break; + + case FRRES_BUFFER_OVERFLOW: + break; + + default: + printk(KERN_INFO "%s: command 0x%02X returned 0x%02X!\n" + , card->devname, mbox->cmd.command, event); + } + + return 0; +} + +/*============================================================================ + * Handle modem error. + * + * Return zero if previous command has to be cancelled. + */ +static int fr_modem_failure (sdla_t *card, fr_mbox_t* mbox) +{ + printk(KERN_INFO "%s: physical link down! (modem error 0x%02X)\n", + card->devname, mbox->data[0]); + + switch (mbox->cmd.command){ + case FR_WRITE: + + case FR_READ: + return 0; + } + + return 1; +} + +/*============================================================================ + * Handle DLCI status change. + * + * Return zero if previous command has to be cancelled. + */ +static int fr_dlci_change (sdla_t *card, fr_mbox_t* mbox) +{ + dlci_status_t* status = (void*)mbox->data; + int cnt = mbox->cmd.length / sizeof(dlci_status_t); + fr_channel_t *chan; + struct net_device* dev2; + + + for (; cnt; --cnt, ++status) { + + unsigned short dlci= status->dlci; + struct net_device* dev = find_channel(card, dlci); + + if (dev == NULL){ + printk(KERN_INFO + "%s: CPE contains unconfigured DLCI= %d\n", + card->devname, dlci); + + printk(KERN_INFO + "%s: unconfigured DLCI %d reported by network\n" + , card->devname, dlci); + + }else{ + if (status->state == FR_LINK_INOPER) { + printk(KERN_INFO + "%s: DLCI %u is inactive!\n", + card->devname, dlci); + + if (dev && netif_running(dev)) + set_chan_state(dev, WAN_DISCONNECTED); + } + + if (status->state & FR_DLCI_DELETED) { + + printk(KERN_INFO + "%s: DLCI %u has been deleted!\n", + card->devname, dlci); + + if (dev && netif_running(dev)){ + + fr_channel_t *chan = dev->priv; + + if (chan->route_flag == ROUTE_ADDED) { + chan->route_flag = REMOVE_ROUTE; + /* The state change will trigger + * the fr polling routine */ + } + + if (chan->inarp == INARP_CONFIGURED) { + chan->inarp = INARP_REQUEST; + } + + set_chan_state(dev, WAN_DISCONNECTED); + } + + } else if (status->state & FR_DLCI_ACTIVE) { + + chan = dev->priv; + + /* This flag is used for configuring specific + DLCI(s) when they become active. + */ + chan->dlci_configured = DLCI_CONFIG_PENDING; + + set_chan_state(dev, WAN_CONNECTED); + + } + } + } + + for (dev2 = card->wandev.dev; dev2; + dev2 = *((struct net_device **)dev2->priv)){ + + chan = dev2->priv; + + if (chan->dlci_configured == DLCI_CONFIG_PENDING) { + if (fr_init_dlci(card, chan)){ + return 1; + } + } + + } + return 1; +} + + +static int fr_init_dlci (sdla_t *card, fr_channel_t *chan) +{ + fr_dlc_conf_t cfg; + + memset(&cfg, 0, sizeof(cfg)); + + if ( chan->cir_status == CIR_DISABLED) { + + cfg.cir_fwd = cfg.cir_bwd = 16; + cfg.bc_fwd = cfg.bc_bwd = 16; + cfg.conf_flags = 0x0001; + + }else if (chan->cir_status == CIR_ENABLED) { + + cfg.cir_fwd = cfg.cir_bwd = chan->cir; + cfg.bc_fwd = cfg.bc_bwd = chan->bc; + cfg.be_fwd = cfg.be_bwd = chan->be; + cfg.conf_flags = 0x0000; + } + + if (fr_dlci_configure( card, &cfg , chan->dlci)){ + printk(KERN_INFO + "%s: DLCI Configure failed for %d\n", + card->devname, chan->dlci); + return 1; + } + + chan->dlci_configured = DLCI_CONFIGURED; + + /* Read the interface byte mapping into the channel + * structure. + */ + read_DLCI_IB_mapping( card, chan ); + + return 0; +} +/******* Miscellaneous ******************************************************/ + +/*============================================================================ + * Update channel state. + */ +static int update_chan_state(struct net_device* dev) +{ + fr_channel_t* chan = dev->priv; + sdla_t* card = chan->card; + fr_mbox_t* mbox = card->mbox; + int retry = MAX_CMD_RETRY; + int err; + + do + { + mbox->cmd.command = FR_LIST_ACTIVE_DLCI; + mbox->cmd.length = 0; + err = sdla_exec(mbox) ? mbox->cmd.result : CMD_TIMEOUT; + } while (err && retry-- && fr_event(card, err, mbox)); + + if (!err) { + + unsigned short* list = (void*)mbox->data; + int cnt = mbox->cmd.length / sizeof(short); + + err=1; + + for (; cnt; --cnt, ++list) { + + if (*list == chan->dlci) { + set_chan_state(dev, WAN_CONNECTED); + + + /* May 23 2000. NC + * When a dlci is added or restarted, + * the dlci_int_interface pointer must + * be reinitialized. */ + if (!chan->dlci_int_interface){ + err=fr_init_dlci (card,chan); + } + break; + } + } + } + + return err; +} + +/*============================================================================ + * Set channel state. + */ +static void set_chan_state(struct net_device* dev, int state) +{ + fr_channel_t* chan = dev->priv; + sdla_t* card = chan->card; + + if (chan->common.state != state) { + + switch (state) { + + case WAN_CONNECTED: + printk(KERN_INFO + "%s: Interface %s: DLCI %d connected\n", + card->devname, dev->name, chan->dlci); + + /* If the interface was previoulsy down, + * bring it up, since the channel is active */ + + trigger_fr_poll (dev); + trigger_fr_arp (dev); + break; + + case WAN_CONNECTING: + printk(KERN_INFO + "%s: Interface %s: DLCI %d connecting\n", + card->devname, dev->name, chan->dlci); + break; + + case WAN_DISCONNECTED: + printk (KERN_INFO + "%s: Interface %s: DLCI %d disconnected!\n", + card->devname, dev->name, chan->dlci); + + /* If the interface is up, bring it down, + * since the channel is now disconnected */ + trigger_fr_poll (dev); + break; + } + + chan->common.state = state; + } + + chan->state_tick = jiffies; +} + +/*============================================================================ + * Find network device by its channel number. + * + * We need this critical flag because we change + * the dlci_to_dev_map outside the interrupt. + * + * NOTE: del_if() functions updates this array, it uses + * the spin locks to avoid corruption. + */ +static struct net_device* find_channel(sdla_t* card, unsigned dlci) +{ + if(dlci > HIGHEST_VALID_DLCI) + return NULL; + + return(card->u.f.dlci_to_dev_map[dlci]); +} + +/*============================================================================ + * Check to see if a frame can be sent. If no transmit buffers available, + * enable transmit interrupts. + * + * Return: 1 - Tx buffer(s) available + * 0 - no buffers available + */ +static int is_tx_ready (sdla_t* card, fr_channel_t* chan) +{ + unsigned char sb; + + if(card->hw.type == SDLA_S514) + return 1; + + sb = inb(card->hw.port); + if (sb & 0x02) + return 1; + + return 0; +} + +/*============================================================================ + * Convert decimal string to unsigned integer. + * If len != 0 then only 'len' characters of the string are converted. + */ +static unsigned int dec_to_uint (unsigned char* str, int len) +{ + unsigned val; + + if (!len) + len = strlen(str); + + for (val = 0; len && is_digit(*str); ++str, --len) + val = (val * 10) + (*str - (unsigned)'0'); + + return val; +} + + + +/*============================================================================= + * Store a UDP management packet for later processing. + */ + +static int store_udp_mgmt_pkt(int udp_type, char udp_pkt_src, sdla_t* card, + struct sk_buff *skb, int dlci) +{ + int udp_pkt_stored = 0; + + struct net_device *dev = find_channel(card, dlci); + fr_channel_t *chan; + + if (!dev || !(chan=dev->priv)) + return 1; + + if(!card->u.f.udp_pkt_lgth && (skb->len <= MAX_LGTH_UDP_MGNT_PKT)){ + card->u.f.udp_pkt_lgth = skb->len + chan->fr_header_len; + card->u.f.udp_type = udp_type; + card->u.f.udp_pkt_src = udp_pkt_src; + card->u.f.udp_dlci = dlci; + memcpy(card->u.f.udp_pkt_data, skb->data, skb->len); + card->u.f.timer_int_enabled |= TMR_INT_ENABLED_UDP; + udp_pkt_stored = 1; + + }else{ + printk(KERN_INFO "ERROR: UDP packet not stored for DLCI %d\n", + dlci); + } + + 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 call of type FPIPE8ND + */ +static int process_udp_mgmt_pkt(sdla_t* card) +{ + + int c_retry = MAX_CMD_RETRY; + unsigned char *buf; + unsigned char frames; + unsigned int len; + unsigned short buffer_length; + struct sk_buff *new_skb; + fr_mbox_t* mbox = card->mbox; + int err; + struct timeval tv; + int udp_mgmt_req_valid = 1; + struct net_device* dev; + fr_channel_t* chan; + fr_udp_pkt_t *fr_udp_pkt; + unsigned short num_trc_els; + fr_trc_el_t* ptr_trc_el; + fr_trc_el_t trc_el; + fpipemon_trc_t* fpipemon_trc; + + char udp_pkt_src = card->u.f.udp_pkt_src; + int dlci = card->u.f.udp_dlci; + + /* Find network interface for this packet */ + dev = find_channel(card, dlci); + if (!dev){ + card->u.f.udp_pkt_lgth = 0; + return 1; + } + if ((chan = dev->priv) == NULL){ + card->u.f.udp_pkt_lgth = 0; + return 1; + } + + /* If the UDP packet is from the network, we are going to have to + transmit a response. Before doing so, we must check to see that + we are not currently transmitting a frame (in 'if_send()') and + that we are not already in a 'delayed transmit' state. + */ + if(udp_pkt_src == UDP_PKT_FRM_NETWORK) { + if (check_tx_status(card,dev)){ + card->u.f.udp_pkt_lgth = 0; + return 1; + } + } + + fr_udp_pkt = (fr_udp_pkt_t *)card->u.f.udp_pkt_data; + + if(udp_pkt_src == UDP_PKT_FRM_NETWORK) { + + switch(fr_udp_pkt->cblock.command) { + + case FR_READ_MODEM_STATUS: + case FR_READ_STATUS: + case FPIPE_ROUTER_UP_TIME: + case FR_READ_ERROR_STATS: + case FPIPE_DRIVER_STAT_GEN: + case FR_READ_STATISTICS: + case FR_READ_ADD_DLC_STATS: + case FR_READ_CONFIG: + case FR_READ_CODE_VERSION: + udp_mgmt_req_valid = 1; + break; + default: + udp_mgmt_req_valid = 0; + break; + } + } + + if(!udp_mgmt_req_valid) { + /* set length to 0 */ + fr_udp_pkt->cblock.length = 0; + /* set return code */ + fr_udp_pkt->cblock.result = 0xCD; + + chan->drvstats_gen.UDP_PIPE_mgmt_direction_err ++; + + if (net_ratelimit()){ + printk(KERN_INFO + "%s: Warning, Illegal UDP command attempted from network: %x\n", + card->devname,fr_udp_pkt->cblock.command); + } + + } else { + + switch(fr_udp_pkt->cblock.command) { + + case FPIPE_ENABLE_TRACING: + if(!card->TracingEnabled) { + do { + mbox->cmd.command = FR_SET_TRACE_CONFIG; + mbox->cmd.length = 1; + mbox->cmd.dlci = 0x00; + mbox->data[0] = fr_udp_pkt->data[0] | + RESET_TRC; + err = sdla_exec(mbox) ? + mbox->cmd.result : CMD_TIMEOUT; + } while (err && c_retry-- && fr_event(card, err, + mbox)); + + if(err) { + card->TracingEnabled = 0; + /* set the return code */ + fr_udp_pkt->cblock.result = + mbox->cmd.result; + mbox->cmd.length = 0; + break; + } + + sdla_peek(&card->hw, NO_TRC_ELEMENTS_OFF, + &num_trc_els, 2); + sdla_peek(&card->hw, BASE_TRC_ELEMENTS_OFF, + &card->u.f.trc_el_base, 4); + card->u.f.curr_trc_el = card->u.f.trc_el_base; + card->u.f.trc_el_last = card->u.f.curr_trc_el + + ((num_trc_els - 1) * + sizeof(fr_trc_el_t)); + + /* Calculate the maximum trace data area in */ + /* the UDP packet */ + card->u.f.trc_bfr_space=(MAX_LGTH_UDP_MGNT_PKT - + //sizeof(fr_encap_hdr_t) - + sizeof(ip_pkt_t) - + sizeof(udp_pkt_t) - + sizeof(wp_mgmt_t) - + sizeof(cblock_t)); + + /* set return code */ + fr_udp_pkt->cblock.result = 0; + + } else { + /* set return code to line trace already + enabled */ + fr_udp_pkt->cblock.result = 1; + } + + mbox->cmd.length = 0; + card->TracingEnabled = 1; + break; + + + case FPIPE_DISABLE_TRACING: + if(card->TracingEnabled) { + + do { + mbox->cmd.command = FR_SET_TRACE_CONFIG; + mbox->cmd.length = 1; + mbox->cmd.dlci = 0x00; + mbox->data[0] = ~ACTIVATE_TRC; + err = sdla_exec(mbox) ? + mbox->cmd.result : CMD_TIMEOUT; + } while (err && c_retry-- && fr_event(card, err, mbox)); + } + + /* set return code */ + fr_udp_pkt->cblock.result = 0; + mbox->cmd.length = 0; + card->TracingEnabled = 0; + break; + + case FPIPE_GET_TRACE_INFO: + + /* Line trace cannot be performed on the 502 */ + if(!card->TracingEnabled) { + /* set return code */ + fr_udp_pkt->cblock.result = 1; + mbox->cmd.length = 0; + break; + } + + ptr_trc_el = (void *)card->u.f.curr_trc_el; + + buffer_length = 0; + fr_udp_pkt->data[0x00] = 0x00; + + for(frames = 0; frames < MAX_FRMS_TRACED; frames ++) { + + sdla_peek(&card->hw, (unsigned long)ptr_trc_el, + (void *)&trc_el.flag, + sizeof(fr_trc_el_t)); + if(trc_el.flag == 0x00) { + break; + } + if((card->u.f.trc_bfr_space - buffer_length) + < sizeof(fpipemon_trc_hdr_t)) { + fr_udp_pkt->data[0x00] |= MORE_TRC_DATA; + break; + } + + fpipemon_trc = + (fpipemon_trc_t *)&fr_udp_pkt->data[buffer_length]; + fpipemon_trc->fpipemon_trc_hdr.status = + trc_el.attr; + fpipemon_trc->fpipemon_trc_hdr.tmstamp = + trc_el.tmstamp; + fpipemon_trc->fpipemon_trc_hdr.length = + trc_el.length; + + if(!trc_el.offset || !trc_el.length) { + + fpipemon_trc->fpipemon_trc_hdr.data_passed = 0x00; + + }else if((trc_el.length + sizeof(fpipemon_trc_hdr_t) + 1) > + (card->u.f.trc_bfr_space - buffer_length)){ + + fpipemon_trc->fpipemon_trc_hdr.data_passed = 0x00; + fr_udp_pkt->data[0x00] |= MORE_TRC_DATA; + + }else { + fpipemon_trc->fpipemon_trc_hdr.data_passed = 0x01; + sdla_peek(&card->hw, trc_el.offset, + fpipemon_trc->data, + trc_el.length); + } + + trc_el.flag = 0x00; + sdla_poke(&card->hw, (unsigned long)ptr_trc_el, + &trc_el.flag, 1); + + ptr_trc_el ++; + if((void *)ptr_trc_el > card->u.f.trc_el_last) + ptr_trc_el = (void*)card->u.f.trc_el_base; + + buffer_length += sizeof(fpipemon_trc_hdr_t); + if(fpipemon_trc->fpipemon_trc_hdr.data_passed) { + buffer_length += trc_el.length; + } + + if(fr_udp_pkt->data[0x00] & MORE_TRC_DATA) { + break; + } + } + + if(frames == MAX_FRMS_TRACED) { + fr_udp_pkt->data[0x00] |= MORE_TRC_DATA; + } + + card->u.f.curr_trc_el = (void *)ptr_trc_el; + + /* set the total number of frames passed */ + fr_udp_pkt->data[0x00] |= + ((frames << 1) & (MAX_FRMS_TRACED << 1)); + + /* set the data length and return code */ + fr_udp_pkt->cblock.length = mbox->cmd.length = buffer_length; + fr_udp_pkt->cblock.result = 0; + break; + + case FPIPE_FT1_READ_STATUS: + sdla_peek(&card->hw, 0xF020, + &fr_udp_pkt->data[0x00] , 2); + fr_udp_pkt->cblock.length = mbox->cmd.length = 2; + fr_udp_pkt->cblock.result = 0; + break; + + case FPIPE_FLUSH_DRIVER_STATS: + init_chan_statistics(chan); + init_global_statistics(card); + mbox->cmd.length = 0; + break; + + case FPIPE_ROUTER_UP_TIME: + do_gettimeofday(&tv); + chan->router_up_time = tv.tv_sec - + chan->router_start_time; + *(unsigned long *)&fr_udp_pkt->data = + chan->router_up_time; + mbox->cmd.length = fr_udp_pkt->cblock.length = 4; + fr_udp_pkt->cblock.result = 0; + break; + + case FPIPE_DRIVER_STAT_IFSEND: + memcpy(fr_udp_pkt->data, + &chan->drvstats_if_send.if_send_entry, + sizeof(if_send_stat_t)); + mbox->cmd.length = fr_udp_pkt->cblock.length =sizeof(if_send_stat_t); + fr_udp_pkt->cblock.result = 0; + break; + + case FPIPE_DRIVER_STAT_INTR: + + memcpy(fr_udp_pkt->data, + &card->statistics.isr_entry, + sizeof(global_stats_t)); + + memcpy(&fr_udp_pkt->data[sizeof(global_stats_t)], + &chan->drvstats_rx_intr.rx_intr_no_socket, + sizeof(rx_intr_stat_t)); + + mbox->cmd.length = fr_udp_pkt->cblock.length = + sizeof(global_stats_t) + + sizeof(rx_intr_stat_t); + fr_udp_pkt->cblock.result = 0; + break; + + case FPIPE_DRIVER_STAT_GEN: + memcpy(fr_udp_pkt->data, + &chan->drvstats_gen.UDP_PIPE_mgmt_kmalloc_err, + sizeof(pipe_mgmt_stat_t)); + + memcpy(&fr_udp_pkt->data[sizeof(pipe_mgmt_stat_t)], + &card->statistics, sizeof(global_stats_t)); + + mbox->cmd.length = fr_udp_pkt->cblock.length = sizeof(global_stats_t)+ + sizeof(rx_intr_stat_t); + fr_udp_pkt->cblock.result = 0; + break; + + + case FR_FT1_STATUS_CTRL: + if(fr_udp_pkt->data[0] == 1) { + if(rCount++ != 0 ){ + fr_udp_pkt->cblock.result = 0; + mbox->cmd.length = 1; + break; + } + } + + /* Disable FT1 MONITOR STATUS */ + if(fr_udp_pkt->data[0] == 0) { + if( --rCount != 0) { + fr_udp_pkt->cblock.result = 0; + mbox->cmd.length = 1; + break; + } + } + goto udp_mgmt_dflt; + + + default: +udp_mgmt_dflt: + do { + memcpy(&mbox->cmd, + &fr_udp_pkt->cblock.command, + sizeof(fr_cmd_t)); + if(mbox->cmd.length) { + memcpy(&mbox->data, + (char *)fr_udp_pkt->data, + mbox->cmd.length); + } + + err = sdla_exec(mbox) ? mbox->cmd.result : + CMD_TIMEOUT; + } while (err && c_retry-- && fr_event(card, err, mbox)); + + if(!err) + chan->drvstats_gen. + UDP_PIPE_mgmt_adptr_cmnd_OK ++; + else + chan->drvstats_gen. + UDP_PIPE_mgmt_adptr_cmnd_timeout ++; + + /* copy the result back to our buffer */ + memcpy(&fr_udp_pkt->cblock.command, + &mbox->cmd, sizeof(fr_cmd_t)); + + if(mbox->cmd.length) { + memcpy(&fr_udp_pkt->data, + &mbox->data, mbox->cmd.length); + } + } + } + + /* Fill UDP TTL */ + fr_udp_pkt->ip_pkt.ttl = card->wandev.ttl; + len = reply_udp(card->u.f.udp_pkt_data, mbox->cmd.length); + + if(udp_pkt_src == UDP_PKT_FRM_NETWORK) { + + chan->fr_header_len=2; + chan->fr_header[0]=Q922_UI; + chan->fr_header[1]=NLPID_IP; + + err = fr_send_data_header(card, dlci, 0, len, + card->u.f.udp_pkt_data,chan->fr_header_len); + if (err){ + chan->drvstats_gen.UDP_PIPE_mgmt_adptr_send_passed ++; + }else{ + chan->drvstats_gen.UDP_PIPE_mgmt_adptr_send_failed ++; + } + + } else { + /* Allocate socket buffer */ + if((new_skb = dev_alloc_skb(len)) != NULL) { + + /* copy data into new_skb */ + buf = skb_put(new_skb, len); + memcpy(buf, card->u.f.udp_pkt_data, len); + + chan->drvstats_gen. + UDP_PIPE_mgmt_passed_to_stack ++; + new_skb->dev = dev; + new_skb->protocol = htons(ETH_P_IP); + new_skb->mac.raw = new_skb->data; + netif_rx(new_skb); + + } else { + chan->drvstats_gen.UDP_PIPE_mgmt_no_socket ++; + printk(KERN_INFO + "%s: UDP mgmt cmnd, no socket buffers available!\n", + card->devname); + } + } + + card->u.f.udp_pkt_lgth = 0; + + return 1; +} + +/*============================================================================== + * Send Inverse ARP Request + */ + +int send_inarp_request(sdla_t *card, struct net_device *dev) +{ + int err=0; + + arphdr_1490_t *ArpPacket; + arphdr_fr_t *arphdr; + fr_channel_t *chan = dev->priv; + struct in_device *in_dev; + + in_dev = dev->ip_ptr; + + if(in_dev != NULL ) { + + ArpPacket = kmalloc(sizeof(arphdr_1490_t) + sizeof(arphdr_fr_t), GFP_ATOMIC); + /* SNAP Header indicating ARP */ + ArpPacket->control = 0x03; + ArpPacket->pad = 0x00; + ArpPacket->NLPID = 0x80; + ArpPacket->OUI[0] = 0; + ArpPacket->OUI[1] = 0; + ArpPacket->OUI[2] = 0; + ArpPacket->PID = 0x0608; + + arphdr = (arphdr_fr_t *)(ArpPacket + 1); // Go to ARP Packet + + /* InARP request */ + arphdr->ar_hrd = 0x0F00; /* Frame Relay HW type */ + arphdr->ar_pro = 0x0008; /* IP Protocol */ + arphdr->ar_hln = 2; /* HW addr length */ + arphdr->ar_pln = 4; /* IP addr length */ + arphdr->ar_op = htons(0x08); /* InARP Request */ + arphdr->ar_sha = 0; /* src HW DLCI - Doesn't matter */ + if(in_dev->ifa_list != NULL) + arphdr->ar_sip = in_dev->ifa_list->ifa_local; /* Local Address */else + arphdr->ar_sip = 0; + arphdr->ar_tha = 0; /* dst HW DLCI - Doesn't matter */ + arphdr->ar_tip = 0; /* Remote Address -- what we want */ + + err = fr_send(card, chan->dlci, 0, sizeof(arphdr_1490_t) + sizeof(arphdr_fr_t), + (void *)ArpPacket); + + if (!err){ + printk(KERN_INFO "\n%s: Sending InARP request on DLCI %d.\n", + card->devname, chan->dlci); + clear_bit(ARP_CRIT,&card->wandev.critical); + } + + kfree(ArpPacket); + }else{ + printk(KERN_INFO "%s: INARP ERROR: %s doesn't have a local IP address!\n", + card->devname,dev->name); + return 1; + } + + return 0; +} + + +/*============================================================================== + * Check packet for ARP Type + */ + +int is_arp(void *buf) +{ + arphdr_1490_t *arphdr = (arphdr_1490_t *)buf; + + if (arphdr->pad == 0x00 && + arphdr->NLPID == 0x80 && + arphdr->PID == 0x0608) + return 1; + else return 0; +} + +/*============================================================================== + * Process ARP Packet Type + */ + +int process_ARP(arphdr_1490_t *ArpPacket, sdla_t *card, struct net_device* dev) +{ + + + arphdr_fr_t *arphdr = (arphdr_fr_t *)(ArpPacket + 1); /* Skip header */ + fr_rx_buf_ctl_t* frbuf = card->rxmb; + struct in_device *in_dev; + fr_channel_t *chan = dev->priv; + + /* Before we transmit ARP packet, we must check + * to see that we are not currently transmitting a + * frame (in 'if_send()') and that we are not + * already in a 'delayed transmit' state. */ + if (check_tx_status(card,dev)){ + if (net_ratelimit()){ + printk(KERN_INFO "%s: Disabling comminication to process ARP\n", + card->devname); + } + set_bit(ARP_CRIT,&card->wandev.critical); + return 0; + } + + in_dev = dev->ip_ptr; + + /* Check that IP addresses exist for our network address */ + if (in_dev == NULL || in_dev->ifa_list == NULL) + return -1; + + switch (ntohs(arphdr->ar_op)) { + + case 0x08: // Inverse ARP request -- Send Reply, add route. + + /* Check for valid Address */ + printk(KERN_INFO "%s: Recvd PtP addr -InArp Req: %u.%u.%u.%u\n", + card->devname, NIPQUAD(arphdr->ar_sip)); + + + /* Check that the network address is the same as ours, only + * if the netowrk mask is not 255.255.255.255. Otherwise + * this check would not make sense */ + + if (in_dev->ifa_list->ifa_mask != 0xFFFFFFFF && + (in_dev->ifa_list->ifa_mask & arphdr->ar_sip) != + (in_dev->ifa_list->ifa_mask & in_dev->ifa_list->ifa_local)){ + printk(KERN_INFO + "%s: Invalid PtP address. %u.%u.%u.%u InARP ignored.\n", + card->devname,NIPQUAD(arphdr->ar_sip)); + + printk(KERN_INFO "%s: mask %u.%u.%u.%u\n", + card->devname, NIPQUAD(in_dev->ifa_list->ifa_mask)); + printk(KERN_INFO "%s: local %u.%u.%u.%u\n", + card->devname,NIPQUAD(in_dev->ifa_list->ifa_local)); + return -1; + } + + if (in_dev->ifa_list->ifa_local == arphdr->ar_sip){ + printk(KERN_INFO + "%s: Local addr = PtP addr. InARP ignored.\n", + card->devname); + return -1; + } + + arphdr->ar_op = htons(0x09); /* InARP Reply */ + + /* Set addresses */ + arphdr->ar_tip = arphdr->ar_sip; + arphdr->ar_sip = in_dev->ifa_list->ifa_local; + + chan->ip_local = in_dev->ifa_list->ifa_local; + chan->ip_remote = arphdr->ar_sip; + + fr_send(card, frbuf->dlci, 0, frbuf->length, (void *)ArpPacket); + + if (test_bit(ARP_CRIT,&card->wandev.critical)){ + if (net_ratelimit()){ + printk(KERN_INFO "%s: ARP Processed Enabling Communication!\n", + card->devname); + } + } + clear_bit(ARP_CRIT,&card->wandev.critical); + + chan->ip_local = in_dev->ifa_list->ifa_local; + chan->ip_remote = arphdr->ar_sip; + + /* Add Route Flag */ + /* The route will be added in the polling routine so + that it is not interrupt context. */ + + chan->route_flag = ADD_ROUTE; + trigger_fr_poll (dev); + + break; + + case 0x09: // Inverse ARP reply + + /* Check for valid Address */ + printk(KERN_INFO "%s: Recvd PtP addr %u.%u.%u.%u -InArp Reply\n", + card->devname, NIPQUAD(arphdr->ar_sip)); + + + /* Compare network addresses, only if network mask + * is not 255.255.255.255 It would not make sense + * to perform this test if the mask was all 1's */ + + if (in_dev->ifa_list->ifa_mask != 0xffffffff && + (in_dev->ifa_list->ifa_mask & arphdr->ar_sip) != + (in_dev->ifa_list->ifa_mask & in_dev->ifa_list->ifa_local)) { + + printk(KERN_INFO "%s: Invalid PtP address. InARP ignored.\n", + card->devname); + return -1; + } + + /* Make sure that the received IP address is not + * the same as our own local address */ + if (in_dev->ifa_list->ifa_local == arphdr->ar_sip) { + printk(KERN_INFO "%s: Local addr = PtP addr. InARP ignored.\n", + card->devname); + return -1; + } + + chan->ip_local = in_dev->ifa_list->ifa_local; + chan->ip_remote = arphdr->ar_sip; + + /* Add Route Flag */ + /* The route will be added in the polling routine so + that it is not interrupt context. */ + + chan->route_flag = ADD_ROUTE; + chan->inarp = INARP_CONFIGURED; + trigger_fr_poll(dev); + + break; + default: + break; // ARP's and RARP's -- Shouldn't happen. + } + + return 0; +} + + +/*============================================================ + * trigger_fr_arp + * + * Description: + * Add an fr_arp() task into a arp + * timer handler for a specific dlci/interface. + * This will kick the fr_arp() routine + * within the specified time interval. + * + * Usage: + * This timer is used to send ARP requests at + * certain time intervals. + * Called by an interrupt to request an action + * at a later date. + */ + +static void trigger_fr_arp(struct net_device *dev) +{ + fr_channel_t* chan = dev->priv; + + mod_timer(&chan->fr_arp_timer, jiffies + chan->inarp_interval * HZ); + return; +} + + + +/*============================================================================== + * ARP Request Action + * + * This funciton is called by timer interrupt to send an arp request + * to the remote end. + */ + +static void fr_arp (unsigned long data) +{ + struct net_device *dev = (struct net_device *)data; + fr_channel_t *chan = dev->priv; + volatile sdla_t *card = chan->card; + fr508_flags_t* flags = card->flags; + + /* Send ARP packets for all devs' until + * ARP state changes to CONFIGURED */ + + if (chan->inarp == INARP_REQUEST && + chan->common.state == WAN_CONNECTED && + card->wandev.state == WAN_CONNECTED){ + set_bit(0,&chan->inarp_ready); + card->u.f.timer_int_enabled |= TMR_INT_ENABLED_ARP; + flags->imask |= FR_INTR_TIMER; + } + + return; +} + + +/*============================================================================== + * Perform the Interrupt Test by running the READ_CODE_VERSION command MAX_INTR_ + * TEST_COUNTER times. + */ +static int intr_test( sdla_t* card ) +{ + fr_mbox_t* mb = card->mbox; + int err,i; + + err = fr_set_intr_mode(card, FR_INTR_READY, card->wandev.mtu, 0 ); + + if (err == CMD_OK) { + + for ( i = 0; i < MAX_INTR_TEST_COUNTER; i++ ) { + /* Run command READ_CODE_VERSION */ + mb->cmd.length = 0; + mb->cmd.command = FR_READ_CODE_VERSION; + err = sdla_exec(mb) ? mb->cmd.result : CMD_TIMEOUT; + if (err != CMD_OK) + fr_event(card, err, mb); + } + + } else { + return err; + } + + err = fr_set_intr_mode( card, 0, card->wandev.mtu, 0 ); + + if( err != CMD_OK ) + return err; + + return 0; +} + +/*============================================================================== + * Determine what type of UDP call it is. FPIPE8ND ? + */ +static int udp_pkt_type( struct sk_buff *skb, sdla_t* card ) +{ + fr_udp_pkt_t *fr_udp_pkt = (fr_udp_pkt_t *)skb->data; + + /* Quick HACK */ + + + if((fr_udp_pkt->ip_pkt.protocol == UDPMGMT_UDP_PROTOCOL) && + (fr_udp_pkt->ip_pkt.ver_inet_hdr_length == 0x45) && + (fr_udp_pkt->udp_pkt.udp_dst_port == + ntohs(card->wandev.udp_port)) && + (fr_udp_pkt->wp_mgmt.request_reply == + UDPMGMT_REQUEST)) { + if(!strncmp(fr_udp_pkt->wp_mgmt.signature, + UDPMGMT_FPIPE_SIGNATURE, 8)){ + return UDP_FPIPE_TYPE; + } + } + return UDP_INVALID_TYPE; +} + + +/*============================================================================== + * Initializes the Statistics values in the fr_channel structure. + */ +void init_chan_statistics( fr_channel_t* chan) +{ + memset(&chan->drvstats_if_send.if_send_entry, 0, + sizeof(if_send_stat_t)); + memset(&chan->drvstats_rx_intr.rx_intr_no_socket, 0, + sizeof(rx_intr_stat_t)); + memset(&chan->drvstats_gen.UDP_PIPE_mgmt_kmalloc_err, 0, + sizeof(pipe_mgmt_stat_t)); +} + +/*============================================================================== + * Initializes the Statistics values in the Sdla_t structure. + */ +void init_global_statistics( sdla_t* card ) +{ + /* Intialize global statistics for a card */ + memset(&card->statistics.isr_entry, 0, sizeof(global_stats_t)); +} + +static void read_DLCI_IB_mapping( sdla_t* card, fr_channel_t* chan ) +{ + fr_mbox_t* mbox = card->mbox; + int retry = MAX_CMD_RETRY; + dlci_IB_mapping_t* result; + int err, counter, found; + + do { + mbox->cmd.command = FR_READ_DLCI_IB_MAPPING; + mbox->cmd.length = 0; + err = sdla_exec(mbox) ? mbox->cmd.result : CMD_TIMEOUT; + } while (err && retry-- && fr_event(card, err, mbox)); + + if( mbox->cmd.result != 0){ + printk(KERN_INFO "%s: Read DLCI IB Mapping failed\n", + chan->name); + } + + counter = mbox->cmd.length / sizeof(dlci_IB_mapping_t); + result = (void *)mbox->data; + + found = 0; + for (; counter; --counter, ++result) { + if ( result->dlci == chan->dlci ) { + chan->IB_addr = result->addr_value; + if(card->hw.type == SDLA_S514){ + chan->dlci_int_interface = + (void*)(card->hw.dpmbase + + chan->IB_addr); + }else{ + chan->dlci_int_interface = + (void*)(card->hw.dpmbase + + (chan->IB_addr & 0x00001FFF)); + + } + found = 1; + break; + } + } + if (!found) + printk( KERN_INFO "%s: DLCI %d not found by IB MAPPING cmd\n", + card->devname, chan->dlci); +} + + + +void s508_s514_lock(sdla_t *card, unsigned long *smp_flags) +{ + if (card->hw.type != SDLA_S514){ + + spin_lock_irqsave(&card->wandev.lock, *smp_flags); + }else{ + spin_lock(&card->u.f.if_send_lock); + } + return; +} + + +void s508_s514_unlock(sdla_t *card, unsigned long *smp_flags) +{ + if (card->hw.type != SDLA_S514){ + + spin_unlock_irqrestore (&card->wandev.lock, *smp_flags); + }else{ + spin_unlock(&card->u.f.if_send_lock); + } + return; +} + + + +/*---------------------------------------------------------------------- + RECEIVE INTERRUPT: BOTTOM HALF HANDLERS + ----------------------------------------------------------------------*/ + + +/*======================================================== + * bh_enqueue + * + * Description: + * Insert a received packet into a circular + * rx queue. This packet will be picked up + * by fr_bh() and sent up the stack to the + * user. + * + * Usage: + * This function is called by rx interrupt, + * in API mode. + * + */ + +static int bh_enqueue(struct net_device *dev, struct sk_buff *skb) +{ + /* Check for full */ + fr_channel_t* chan = dev->priv; + sdla_t *card = chan->card; + + + if (atomic_read(&chan->bh_buff_used) == MAX_BH_BUFF){ + ++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-1)){ + chan->bh_write=0; + }else{ + ++chan->bh_write; + } + + atomic_inc(&chan->bh_buff_used); + + return 0; +} + + +/*======================================================== + * trigger_fr_bh + * + * Description: + * Kick the fr_bh() handler + * + * Usage: + * rx interrupt calls this function during + * the API mode. + */ + +static void trigger_fr_bh (fr_channel_t *chan) +{ + if (!test_and_set_bit(0,&chan->tq_working)){ + wanpipe_queue_work(&chan->common.wanpipe_work); + } +} + + +/*======================================================== + * fr_bh + * + * Description: + * Frame relay receive BH handler. + * Dequeue data from the BH circular + * buffer and pass it up the API sock. + * + * Rationale: + * This fuction is used to offload the + * rx_interrupt during API operation mode. + * The fr_bh() function executes for each + * dlci/interface. + * + * Once receive interrupt copies data from the + * card into an skb buffer, the skb buffer + * is appended to a circular BH buffer. + * Then the interrupt kicks fr_bh() to finish the + * job at a later time (not within the interrupt). + * + * Usage: + * Interrupts use this to defer a task to + * a polling routine. + * + */ + +static void fr_bh(struct net_device * dev) +{ + fr_channel_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)){ + + if (chan->common.sk == NULL || chan->common.func == NULL){ + clear_bit(0, &chan->tq_working); + return; + } + + 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; + ++chan->ifstats.rx_dropped; + dev_kfree_skb_any(skb); + fr_bh_cleanup(dev); + continue; + } + + if (chan->common.func(skb,dev,chan->common.sk) != 0){ + /* Sock full cannot send, queue us for + * another try */ + atomic_set(&chan->common.receive_block,1); + return; + }else{ + fr_bh_cleanup(dev); + } + }else{ + fr_bh_cleanup(dev); + } + } + clear_bit(0, &chan->tq_working); + + return; +} + +static int fr_bh_cleanup(struct net_device *dev) +{ + fr_channel_t* chan = dev->priv; + + ((bh_data_t *)&chan->bh_head[chan->bh_read])->skb = NULL; + + if (chan->bh_read == (MAX_BH_BUFF-1)){ + chan->bh_read=0; + }else{ + ++chan->bh_read; + } + + atomic_dec(&chan->bh_buff_used); + return 0; +} + + +/*---------------------------------------------------------------------- + POLL BH HANDLERS AND KICK ROUTINES + ----------------------------------------------------------------------*/ + +/*============================================================ + * trigger_fr_poll + * + * Description: + * Add a fr_poll() task into a tq_scheduler bh handler + * for a specific dlci/interface. This will kick + * the fr_poll() routine at a later time. + * + * Usage: + * Interrupts use this to defer a taks to + * a polling routine. + * + */ +static void trigger_fr_poll(struct net_device *dev) +{ + fr_channel_t* chan = dev->priv; + schedule_work(&chan->fr_poll_work); + return; +} + + +/*============================================================ + * fr_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: + * Frame relay polling routine, responsible for + * shutting down interfaces upon disconnect + * and adding/removing routes. + * + * Usage: + * This function is executed for each frame relay + * dlci/interface through a tq_schedule bottom half. + * + * trigger_fr_poll() function is used to kick + * the fr_poll routine. + */ + +static void fr_poll(struct net_device *dev) +{ + + fr_channel_t* chan; + sdla_t *card; + u8 check_gateway=0; + + if (!dev || (chan = dev->priv) == NULL) + return; + + card = chan->card; + + /* (Re)Configuraiton is in progress, stop what you are + * doing and get out */ + if (test_bit(PERI_CRIT,&card->wandev.critical)){ + return; + } + + switch (chan->common.state){ + + case WAN_DISCONNECTED: + + if (test_bit(DYN_OPT_ON,&chan->interface_down) && + !test_bit(DEV_DOWN, &chan->interface_down) && + dev->flags&IFF_UP){ + + printk(KERN_INFO "%s: Interface %s is Down.\n", + card->devname,dev->name); + change_dev_flags(dev,dev->flags&~IFF_UP); + set_bit(DEV_DOWN, &chan->interface_down); + chan->route_flag = NO_ROUTE; + + }else{ + if (chan->inarp != INARP_NONE) + process_route(dev); + } + break; + + case WAN_CONNECTED: + + if (test_bit(DYN_OPT_ON,&chan->interface_down) && + test_bit(DEV_DOWN, &chan->interface_down) && + !(dev->flags&IFF_UP)){ + + printk(KERN_INFO "%s: Interface %s is Up.\n", + card->devname,dev->name); + + change_dev_flags(dev,dev->flags|IFF_UP); + clear_bit(DEV_DOWN, &chan->interface_down); + check_gateway=1; + } + + if (chan->inarp != INARP_NONE){ + process_route(dev); + check_gateway=1; + } + + if (chan->gateway && check_gateway) + add_gateway(card,dev); + + break; + + } + + return; +} + +/*============================================================== + * check_tx_status + * + * Rationale: + * We cannot transmit from an interrupt while + * the if_send is transmitting data. Therefore, + * we must check whether the tx buffers are + * begin used, before we transmit from an + * interrupt. + * + * Description: + * Checks whether it's safe to use the transmit + * buffers. + * + * Usage: + * ARP and UDP handling routines use this function + * because, they need to transmit data during + * an interrupt. + */ + +static int check_tx_status(sdla_t *card, struct net_device *dev) +{ + + if (card->hw.type == SDLA_S514){ + if (test_bit(SEND_CRIT, (void*)&card->wandev.critical) || + test_bit(SEND_TXIRQ_CRIT, (void*)&card->wandev.critical)) { + return 1; + } + } + + if (netif_queue_stopped(dev) || (card->u.f.tx_interrupts_pending)) + return 1; + + return 0; +} + +/*=============================================================== + * move_dev_to_next + * + * Description: + * Move the dev pointer to the next location in the + * link list. Check if we are at the end of the + * list, if so start from the begining. + * + * Usage: + * Timer interrupt uses this function to efficiently + * step through the devices that need to send ARP data. + * + */ + +struct net_device *move_dev_to_next(sdla_t *card, struct net_device *dev) +{ + if (card->wandev.new_if_cnt != 1){ + if (!*((struct net_device **)dev->priv)) + return card->wandev.dev; + else + return *((struct net_device **)dev->priv); + } + return dev; +} + +/*============================================================== + * trigger_config_fr + * + * Rationale: + * All commands must be performed inside of a + * interrupt. + * + * Description: + * Kick the config_fr() routine throught the + * timer interrupt. + */ + + +static void trigger_config_fr (sdla_t *card) +{ + fr508_flags_t* flags = card->flags; + + card->u.f.timer_int_enabled |= TMR_INT_ENABLED_CONFIG; + flags->imask |= FR_INTR_TIMER; +} + + +/*============================================================== + * config_fr + * + * Rationale: + * All commands must be performed inside of a + * interrupt. + & + * Description: + * Configure a DLCI. This function is executed + * by a timer_interrupt. The if_open() function + * triggers it. + * + * Usage: + * new_if() collects all data necessary to + * configure the DLCI. It sets the chan->dlci_ready + * bit. When the if_open() function is executed + * it checks this bit, and if its set it triggers + * the timer interrupt to execute the config_fr() + * function. + */ + +static void config_fr (sdla_t *card) +{ + struct net_device *dev; + fr_channel_t *chan; + + for (dev = card->wandev.dev; dev; + dev = *((struct net_device **)dev->priv)) { + + if ((chan=dev->priv) == NULL) + continue; + + if (!test_bit(0,&chan->config_dlci)) + continue; + + clear_bit(0,&chan->config_dlci); + + /* If signalling is set to NO, then setup + * DLCI addresses right away. Don't have to wait for + * link to connect. + */ + if (card->wandev.signalling == WANOPT_NO){ + printk(KERN_INFO "%s: Signalling set to NO: Mapping DLCI's\n", + card->wandev.name); + if (fr_init_dlci(card,chan)){ + printk(KERN_INFO "%s: ERROR: Failed to configure DLCI %i !\n", + card->devname, chan->dlci); + return; + } + } + + if (card->wandev.station == WANOPT_CPE) { + + update_chan_state(dev); + + /* CPE: issue full status enquiry */ + fr_issue_isf(card, FR_ISF_FSE); + + } else { + /* FR switch: activate DLCI(s) */ + + /* For Switch emulation we have to ADD and ACTIVATE + * the DLCI(s) that were configured with the SET_DLCI_ + * CONFIGURATION command. Add and Activate will fail if + * DLCI specified is not included in the list. + * + * Also If_open is called once for each interface. But + * it does not get in here for all the interface. So + * we have to pass the entire list of DLCI(s) to add + * activate routines. + */ + + if (!check_dlci_config (card, chan)){ + fr_add_dlci(card, chan->dlci); + fr_activate_dlci(card, chan->dlci); + } + } + + card->u.f.dlci_to_dev_map[chan->dlci] = dev; + } + return; +} + + +/*============================================================== + * config_fr + * + * Rationale: + * All commands must be executed during an interrupt. + * + * Description: + * Trigger uncofig_fr() function through + * the timer interrupt. + * + */ + +static void trigger_unconfig_fr(struct net_device *dev) +{ + fr_channel_t *chan = dev->priv; + volatile sdla_t *card = chan->card; + u32 timeout; + fr508_flags_t* flags = card->flags; + int reset_critical=0; + + if (test_bit(PERI_CRIT,(void*)&card->wandev.critical)){ + clear_bit(PERI_CRIT,(void*)&card->wandev.critical); + reset_critical=1; + } + + /* run unconfig_dlci() function + * throught the timer interrupt */ + set_bit(0,(void*)&chan->unconfig_dlci); + card->u.f.timer_int_enabled |= TMR_INT_ENABLED_UNCONFIG; + flags->imask |= FR_INTR_TIMER; + + /* Wait for the command to complete */ + timeout = jiffies; + for(;;) { + + if(!(card->u.f.timer_int_enabled & TMR_INT_ENABLED_UNCONFIG)) + break; + + if ((jiffies - timeout) > (1 * HZ)){ + card->u.f.timer_int_enabled &= ~TMR_INT_ENABLED_UNCONFIG; + printk(KERN_INFO "%s: Failed to delete DLCI %i\n", + card->devname,chan->dlci); + break; + } + } + + if (reset_critical){ + set_bit(PERI_CRIT,(void*)&card->wandev.critical); + } +} + +/*============================================================== + * unconfig_fr + * + * Rationale: + * All commands must be executed during an interrupt. + * + * Description: + * Remove the dlci from firmware. + * This funciton is used in NODE shutdown. + */ + +static void unconfig_fr (sdla_t *card) +{ + struct net_device *dev; + fr_channel_t *chan; + + for (dev = card->wandev.dev; dev; + dev = *((struct net_device **)dev->priv)){ + + if ((chan=dev->priv) == NULL) + continue; + + if (!test_bit(0,&chan->unconfig_dlci)) + continue; + + clear_bit(0,&chan->unconfig_dlci); + + if (card->wandev.station == WANOPT_NODE){ + printk(KERN_INFO "%s: Unconfiguring DLCI %i\n", + card->devname,chan->dlci); + fr_delete_dlci(card,chan->dlci); + } + card->u.f.dlci_to_dev_map[chan->dlci] = NULL; + } +} + +static int setup_fr_header(struct sk_buff **skb_orig, struct net_device* dev, + char op_mode) +{ + struct sk_buff *skb = *skb_orig; + fr_channel_t *chan=dev->priv; + + if (op_mode == WANPIPE){ + + chan->fr_header[0]=Q922_UI; + + switch (htons(skb->protocol)){ + + case ETH_P_IP: + chan->fr_header[1]=NLPID_IP; + break; + default: + return -EINVAL; + } + + return 2; + } + + /* If we are in bridging mode, we must apply + * an Ethernet header */ + if (op_mode == BRIDGE || op_mode == BRIDGE_NODE){ + + + /* Encapsulate the packet as a bridged Ethernet frame. */ +#ifdef DEBUG + printk(KERN_INFO "%s: encapsulating skb for frame relay\n", + dev->name); +#endif + + chan->fr_header[0] = 0x03; + chan->fr_header[1] = 0x00; + chan->fr_header[2] = 0x80; + chan->fr_header[3] = 0x00; + chan->fr_header[4] = 0x80; + chan->fr_header[5] = 0xC2; + chan->fr_header[6] = 0x00; + chan->fr_header[7] = 0x07; + + /* Yuck. */ + skb->protocol = ETH_P_802_3; + return 8; + + } + + return 0; +} + + +static int check_dlci_config (sdla_t *card, fr_channel_t *chan) +{ + fr_mbox_t* mbox = card->mbox; + int err=0; + fr_conf_t *conf=NULL; + unsigned short dlci_num = chan->dlci; + int dlci_offset=0; + struct net_device *dev = NULL; + + mbox->cmd.command = FR_READ_CONFIG; + mbox->cmd.length = 0; + mbox->cmd.dlci = dlci_num; + + err = sdla_exec(mbox) ? mbox->cmd.result : CMD_TIMEOUT; + + if (err == CMD_OK){ + return 0; + } + + for (dev = card->wandev.dev; dev; + dev=*((struct net_device **)dev->priv)) + set_chan_state(dev,WAN_DISCONNECTED); + + printk(KERN_INFO "DLCI %i Not configured, configuring\n",dlci_num); + + mbox->cmd.command = FR_COMM_DISABLE; + mbox->cmd.length = 0; + err = sdla_exec(mbox) ? mbox->cmd.result : CMD_TIMEOUT; + if (err != CMD_OK){ + fr_event(card, err, mbox); + return 2; + } + + printk(KERN_INFO "Disabled Communications \n"); + + mbox->cmd.command = FR_READ_CONFIG; + mbox->cmd.length = 0; + mbox->cmd.dlci = 0; + + err = sdla_exec(mbox) ? mbox->cmd.result : CMD_TIMEOUT; + + if (err != CMD_OK){ + fr_event(card, err, mbox); + return 2; + } + + conf = (fr_conf_t *)mbox->data; + + dlci_offset=0; + for (dev = card->wandev.dev; dev; + dev = *((struct net_device **)dev->priv)) { + fr_channel_t *chan_tmp = dev->priv; + conf->dlci[dlci_offset] = chan_tmp->dlci; + dlci_offset++; + } + + printk(KERN_INFO "Got Fr configuration Buffer Length is %x Dlci %i Dlci Off %i\n", + mbox->cmd.length, + mbox->cmd.length > 0x20 ? conf->dlci[0] : -1, + dlci_offset ); + + mbox->cmd.length = 0x20 + dlci_offset*2; + + mbox->cmd.command = FR_SET_CONFIG; + mbox->cmd.dlci = 0; + + err = sdla_exec(mbox) ? mbox->cmd.result : CMD_TIMEOUT; + + if (err != CMD_OK){ + fr_event(card, err, mbox); + return 2; + } + + initialize_rx_tx_buffers (card); + + + printk(KERN_INFO "Configuraiton Succeded for new DLCI %i\n",dlci_num); + + if (fr_comm_enable (card)){ + return 2; + } + + printk(KERN_INFO "Enabling Communications \n"); + + for (dev = card->wandev.dev; dev; + dev = *((struct net_device **)dev->priv)) { + fr_channel_t *chan_tmp = dev->priv; + fr_init_dlci(card,chan_tmp); + fr_add_dlci(card, chan_tmp->dlci); + fr_activate_dlci(card, chan_tmp->dlci); + } + + printk(KERN_INFO "END OF CONFIGURAITON %i\n",dlci_num); + + return 1; +} + +static void initialize_rx_tx_buffers (sdla_t *card) +{ + fr_buf_info_t* buf_info; + + if (card->hw.type == SDLA_S514) { + + buf_info = (void*)(card->hw.dpmbase + FR_MB_VECTOR + + FR508_RXBC_OFFS); + + card->rxmb = (void*)(buf_info->rse_next + card->hw.dpmbase); + + card->u.f.rxmb_base = + (void*)(buf_info->rse_base + card->hw.dpmbase); + + card->u.f.rxmb_last = + (void*)(buf_info->rse_base + + (buf_info->rse_num - 1) * sizeof(fr_rx_buf_ctl_t) + + card->hw.dpmbase); + }else{ + buf_info = (void*)(card->hw.dpmbase + FR508_RXBC_OFFS); + + card->rxmb = (void*)(buf_info->rse_next - + FR_MB_VECTOR + card->hw.dpmbase); + + card->u.f.rxmb_base = + (void*)(buf_info->rse_base - + FR_MB_VECTOR + card->hw.dpmbase); + + card->u.f.rxmb_last = + (void*)(buf_info->rse_base + + (buf_info->rse_num - 1) * sizeof(fr_rx_buf_ctl_t) - + FR_MB_VECTOR + card->hw.dpmbase); + } + + card->u.f.rx_base = buf_info->buf_base; + card->u.f.rx_top = buf_info->buf_top; + + card->u.f.tx_interrupts_pending = 0; + + return; +} + + + +MODULE_LICENSE("GPL"); + +/****** End *****************************************************************/ |