Linux-2.6.12-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!
diff --git a/drivers/net/wan/sdla_fr.c b/drivers/net/wan/sdla_fr.c
new file mode 100644
index 0000000..2efccb0
--- /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 *****************************************************************/