/***************************************************************************** * sdla_fr.c WANPIPE(tm) Multiprotocol WAN Link Driver. Frame relay module. * * Author(s): Gene Kozin * Jaspreet Singh * * Copyright: (c) 1995-1997 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 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 /* printk(), and other useful stuff */ #include /* offsetof(), etc. */ #include /* return codes */ #include /* inline memset(), etc. */ #include /* kmalloc(), kfree() */ #include /* WAN router definitions */ #include /* WANPIPE common user API definitions */ #include /* ARPHRD_* defines */ #include /* htons(), etc. */ #include /* for inb(), outb(), etc. */ #include /* for do_gettimeofday */ #define _GNUC_ #include /* frame relay firmware API definitions */ #include /****** 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 /* Interrupt mode for DLCI = 0 */ #define BUFFER_INTR_MODE 0x00 #define DLCI_LIST_INTR_MODE 0x01 /* Transmit Interrupt Status */ #define DISABLED 0x00 #define WAITING_TO_BE_ENABLED 0x01 /* 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 { 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() */ char state; /* channel state */ 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 */ sdla_t *card; /* -> owner */ struct net_device_stats ifstats; /* interface statistics */ unsigned long if_send_entry; unsigned long if_send_skb_null; unsigned long if_send_broadcast; unsigned long if_send_multicast; unsigned long if_send_critical_ISR; unsigned long if_send_critical_non_ISR; unsigned long if_send_busy; unsigned long if_send_busy_timeout; unsigned long if_send_FPIPE_request; unsigned long if_send_DRVSTATS_request; unsigned long if_send_wan_disconnected; unsigned long if_send_dlci_disconnected; unsigned long if_send_no_bfrs; unsigned long if_send_adptr_bfrs_full; unsigned long if_send_bfrs_passed_to_adptr; unsigned long rx_intr_no_socket; unsigned long rx_intr_dev_not_started; unsigned long rx_intr_FPIPE_request; unsigned long rx_intr_DRVSTATS_request; unsigned long rx_intr_bfr_not_passed_to_stack; unsigned long rx_intr_bfr_passed_to_stack; unsigned long UDP_FPIPE_mgmt_kmalloc_err; unsigned long UDP_FPIPE_mgmt_direction_err; unsigned long UDP_FPIPE_mgmt_adptr_type_err; unsigned long UDP_FPIPE_mgmt_adptr_cmnd_OK; unsigned long UDP_FPIPE_mgmt_adptr_cmnd_timeout; unsigned long UDP_FPIPE_mgmt_adptr_send_passed; unsigned long UDP_FPIPE_mgmt_adptr_send_failed; unsigned long UDP_FPIPE_mgmt_not_passed_to_stack; unsigned long UDP_FPIPE_mgmt_passed_to_stack; unsigned long UDP_FPIPE_mgmt_no_socket; unsigned long UDP_DRVSTATS_mgmt_kmalloc_err; unsigned long UDP_DRVSTATS_mgmt_adptr_cmnd_OK; unsigned long UDP_DRVSTATS_mgmt_adptr_cmnd_timeout; unsigned long UDP_DRVSTATS_mgmt_adptr_send_passed; unsigned long UDP_DRVSTATS_mgmt_adptr_send_failed; unsigned long UDP_DRVSTATS_mgmt_not_passed_to_stack; unsigned long UDP_DRVSTATS_mgmt_passed_to_stack; unsigned long UDP_DRVSTATS_mgmt_no_socket; unsigned long router_up_time; } fr_channel_t; 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; static unsigned short num_frames; static unsigned long curr_trace_addr; static unsigned long start_trace_addr; static unsigned short available_buffer_space; static char TracingEnabled; /* 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(wan_device_t * wandev); static int new_if(wan_device_t * wandev, struct device *dev, wanif_conf_t * conf); static int del_if(wan_device_t * wandev, struct device *dev); /* 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 device *dev); static int if_open(struct device *dev); static int if_close(struct device *dev); static int if_header(struct sk_buff *skb, struct device *dev, unsigned short type, void *daddr, void *saddr, unsigned len); static int if_rebuild_hdr(struct sk_buff *skb); static int if_send(struct sk_buff *skb, struct device *dev); static struct net_device_stats *if_stats(struct device *dev); /* Interrupt handlers */ static void fr502_isr(sdla_t * card); static void fr508_isr(sdla_t * card); static void fr502_rx_intr(sdla_t * card); static void fr508_rx_intr(sdla_t * card); static void tx_intr(sdla_t * card); static void spur_intr(sdla_t * card); /* Background polling routines */ static void wpf_poll(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_set_intr_mode(sdla_t * card, unsigned mode, unsigned mtu); static int fr_comm_enable(sdla_t * card); static int 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, int num); static int fr_activate_dlci(sdla_t * card, int dlci, int num); static int fr_issue_isf(sdla_t * card, int isf); static int fr502_send(sdla_t * card, int dlci, int attr, int len, void *buf); static int fr508_send(sdla_t * card, int dlci, int attr, int len, void *buf); /* 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 device *dev); static void set_chan_state(struct device *dev, int state); static struct 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); /* Udp management functions */ static int process_udp_mgmt_pkt(char udp_pkt_src, sdla_t * card, struct sk_buff *skb, struct device *dev, int dlci, fr_channel_t * chan); static int process_udp_driver_call(char udp_pkt_src, sdla_t * card, struct sk_buff *skb, struct device *dev, int dlci, fr_channel_t * chan); static int udp_pkt_type(struct sk_buff *skb, sdla_t * card); /* 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); /****** 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) { union { char str[80]; fr_conf_t cfg; } u; int i; /* 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_FR502: card->mbox = (void *) (card->hw.dpmbase + FR502_MBOX_OFFS); card->rxmb = (void *) (card->hw.dpmbase + FR502_RXMB_OFFS); card->flags = (void *) (card->hw.dpmbase + FR502_FLAG_OFFS); card->isr = &fr502_isr; break; case SFID_FR508: card->mbox = (void *) (card->hw.dpmbase + FR508_MBOX_OFFS); card->flags = (void *) (card->hw.dpmbase + FR508_FLAG_OFFS); card->isr = &fr508_isr; break; default: return -EINVAL; } /* 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 = max(min(conf->mtu, 4080), FR_CHANNEL_MTU + FR_HEADER_LEN); conf->bps = min(conf->bps, 2048000); /* Configure adapter firmware */ memset(&u.cfg, 0, sizeof(u.cfg)); 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; if (conf->station == WANOPT_CPE) { u.cfg.options = 0x0080; printk(KERN_INFO "%s: Global CIR enabled by Default\n", card->devname); } else { u.cfg.options = 0x0081; } switch (conf->u.fr.signalling) { case WANOPT_FR_Q933: u.cfg.options |= 0x0200; break; case WANOPT_FR_LMI: u.cfg.options |= 0x0400; break; } if (conf->station == WANOPT_CPE) { 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(max(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(conf->u.fr.t391, 30); else u.cfg.t391 = 5; if (conf->u.fr.t392) u.cfg.t392 = min(conf->u.fr.t392, 30); else u.cfg.t392 = 15; if (conf->u.fr.n391) u.cfg.n391 = min(conf->u.fr.n391, 255); else u.cfg.n391 = 2; if (conf->u.fr.n392) u.cfg.n392 = min(conf->u.fr.n392, 10); else u.cfg.n392 = 3; if (conf->u.fr.n393) u.cfg.n393 = min(conf->u.fr.n393, 10); else u.cfg.n393 = 4; if (fr_configure(card, &u.cfg)) return -EIO; if (card->hw.fwid == SFID_FR508) { fr_buf_info_t *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_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->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 = &wpf_poll; 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->wandev.enable_tx_int = 0; card->irq_dis_if_send_count = 0; card->irq_dis_poll_count = 0; card->wandev.enable_IPX = conf->enable_IPX; if (conf->network_number) card->wandev.network_number = conf->network_number; else card->wandev.network_number = 0xDEADBEEF; /* Intialize global statistics for a card */ init_global_statistics(card); TracingEnabled = 0; return 0; } /******* WAN Device Driver Entry Points *************************************/ /*============================================================================ * Update device status & statistics. */ static int update(wan_device_t * wandev) { sdla_t *card; /* sanity checks */ if ((wandev == NULL) || (wandev->private == NULL)) return -EFAULT; if (wandev->state == WAN_UNCONFIGURED) return -ENODEV; if (test_and_set_bit(0, (void *) &wandev->critical)) return -EAGAIN; card = wandev->private; fr_get_err_stats(card); fr_get_stats(card); wandev->critical = 0; return 0; } /*============================================================================ * Create new logical channel. * This routine is called by the router when ROUTER_IFNEW IOCTL is being * handled. * o parse media- and hardware-specific configuration * o make sure that a new channel can be created * o allocate resources, if necessary * o prepare network device structure for registaration. * * Return: 0 o.k. * < 0 failure (channel will not be created) */ static int new_if(wan_device_t * wandev, struct device *dev, wanif_conf_t * conf) { sdla_t *card = wandev->private; fr_channel_t *chan; 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])) { int dlci = dec_to_uint(conf->addr, 0); if (dlci && (dlci <= 4095)) { 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 (err) { kfree(chan); return err; } /* place cir,be,bc and other channel specific information into the * chan structure */ if (conf->cir) { chan->cir = max(1, min(conf->cir, 512)); chan->cir_status = CIR_ENABLED; if (conf->bc) chan->bc = max(1, min(conf->bc, 512)); if (conf->be) chan->be = max(0, min(conf->be, 511)); } else chan->cir_status = CIR_DISABLED; chan->mc = conf->mc; chan->dlci_configured = DLCI_NOT_CONFIGURED; chan->tx_int_status = DISABLED; init_chan_statistics(chan); /* prepare network device data space for registration */ dev->name = chan->name; dev->init = &if_init; dev->priv = chan; return 0; } /*============================================================================ * Delete logical channel. */ static int del_if(wan_device_t * wandev, struct device *dev) { if (dev->priv) { kfree(dev->priv); dev->priv = NULL; } return 0; } /****** 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 device *dev) { fr_channel_t *chan = dev->priv; sdla_t *card = chan->card; wan_device_t *wandev = &card->wandev; /* Initialize device driver entry points */ dev->open = &if_open; dev->stop = &if_close; dev->hard_header = &if_header; dev->rebuild_header = &if_rebuild_hdr; dev->hard_start_xmit = &if_send; dev->get_stats = &if_stats; /* Initialize media-specific parameters */ dev->type = ARPHRD_DLCI; /* ARP h/w type */ dev->mtu = FR_CHANNEL_MTU; 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); /* Initialize hardware parameters (just for reference) */ dev->irq = wandev->irq; dev->dma = wandev->dma; dev->base_addr = wandev->ioport; dev->mem_start = (unsigned long)wandev->maddr; dev->mem_end = dev->mem_start + wandev->msize - 1; /* Set transmit buffer queue length */ dev->tx_queue_len = 10; /* Initialize socket buffers */ dev_init_buffers(dev); set_chan_state(dev, WAN_DISCONNECTED); 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 device *dev) { fr_channel_t *chan = dev->priv; sdla_t *card = chan->card; struct device *dev2; int err = 0; fr508_flags_t *flags = card->flags; struct timeval tv; if (dev->start) return -EBUSY; /* only one open is allowed */ if (test_and_set_bit(0, (void *) &card->wandev.critical)) return -EAGAIN; if (!card->open_cnt) { Intr_test_counter = 0; card->intr_mode = INTR_TEST_MODE; err = intr_test(card); if ((err) || (Intr_test_counter != (MAX_INTR_TEST_COUNTER + 1))) { printk(KERN_INFO "%s: Interrupt Test Failed, Counter: %i\n", card->devname, Intr_test_counter); err = -EIO; card->wandev.critical = 0; return err; } printk(KERN_INFO "%s: Interrupt Test Passed, Counter: %i\n" ,card->devname, Intr_test_counter); /* The following allocates and intializes a circular * link list of interfaces per card. */ card->devs_struct = kmalloc(sizeof(load_sharing_t), GFP_KERNEL); if (card->devs_struct == NULL) return -ENOMEM; card->dev_to_devtint_next = card->devs_struct; for (dev2 = card->wandev.dev; dev2; dev2 = dev2->slave) { (card->devs_struct)->dev_ptr = dev2; if (dev2->slave == NULL) (card->devs_struct)->next = card->dev_to_devtint_next; else { (card->devs_struct)->next = kmalloc( sizeof(load_sharing_t), GFP_KERNEL); if ((card->devs_struct)->next == NULL) return -ENOMEM; card->devs_struct = (card->devs_struct)->next; } } card->devs_struct = card->dev_to_devtint_next; card->intr_mode = BUFFER_INTR_MODE; /* check all the interfaces for the device to see if CIR has been enabled for any DLCI(s). If so then use the DLCI list Interrupt mode for fr_set_intr_mode(), otherwise use the default global interrupt mode */ for (dev2 = card->wandev.dev; dev2; dev2 = dev2->slave) { if (((fr_channel_t *) dev2->priv)->cir_status == CIR_ENABLED) { card->intr_mode = DLCI_LIST_INTR_MODE; break; } } /* 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 (card->intr_mode == BUFFER_INTR_MODE) { if (fr_set_intr_mode(card, 0x03, card->wandev.mtu)) { err = -EIO; card->wandev.critical = 0; return err; } printk(KERN_INFO "%s: Global Buffering Tx Interrupt Mode\n" ,card->devname); } else if (card->intr_mode == DLCI_LIST_INTR_MODE) { if (fr_set_intr_mode(card, 0x83, card->wandev.mtu)) { err = -EIO; card->wandev.critical = 0; return err; } printk(KERN_INFO "%s: DLCI list Tx Interrupt Mode\n", card->devname); } flags->imask &= ~0x02; if (fr_comm_enable(card)) { err = -EIO; card->wandev.critical = 0; return err; } wanpipe_set_state(card, WAN_CONNECTED); if (card->wandev.station == WANOPT_CPE) { /* 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. */ fr_add_dlci(card, card->u.f.node_dlci[0], card->u.f.dlci_num); fr_activate_dlci(card, card->u.f.node_dlci[0], card->u.f.dlci_num); } } dev->mtu = min(dev->mtu, card->wandev.mtu - FR_HEADER_LEN); dev->interrupt = 0; dev->tbusy = 0; dev->start = 1; wanpipe_open(card); update_chan_state(dev); do_gettimeofday(&tv); chan->router_start_time = tv.tv_sec; card->wandev.critical = 0; 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 device *dev) { fr_channel_t *chan = dev->priv; sdla_t *card = chan->card; if (test_and_set_bit(0, (void *) &card->wandev.critical)) return -EAGAIN; dev->start = 0; wanpipe_close(card); if (!card->open_cnt) { wanpipe_set_state(card, WAN_DISCONNECTED); fr_set_intr_mode(card, 0, 0); fr_comm_disable(card); } card->wandev.critical = 0; return 0; } /*============================================================================ * Build media header. * o encapsulate packet according to encapsulation type. * * The trick here is to put packet type (Ethertype) into 'protocol' field of * the socket buffer, so that we don't forget it. If encapsulation fails, * set skb->protocol to 0 and discard packet later. * * Return: media header length. */ static int if_header(struct sk_buff *skb, struct device *dev, unsigned short type, void *daddr, void *saddr, unsigned len) { int hdr_len = 0; skb->protocol = type; hdr_len = wanrouter_encapsulate(skb, dev); if (hdr_len < 0) { hdr_len = 0; skb->protocol = 0; } skb_push(skb, 1); skb->data[0] = Q922_UI; ++hdr_len; return hdr_len; } /*============================================================================ * Re-build media header. * * Return: 1 physical address resolved. * 0 physical address not resolved */ static int if_rebuild_hdr(struct sk_buff *skb) { struct 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; } /*============================================================================ * Send a packet on a network interface. * o set tbusy flag (marks start of the transmission) to block a timer-based * transmit from overlapping. * o check link state. If link is not up, then drop the packet. * o 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. Setting tbusy flag will inhibit further transmit requests from the * protocol stack and can be used for flow control with protocol layer. */ static int if_send(struct sk_buff *skb, struct device *dev) { fr_channel_t *chan = dev->priv; sdla_t *card = chan->card; int retry = 0, err; unsigned char *sendpacket; struct device *dev2; unsigned long check_braddr, check_mcaddr; fr508_flags_t *adptr_flags = card->flags; int udp_type, send_data; fr_dlci_interface_t *dlci_interface = chan->dlci_int_interface; unsigned long host_cpu_flags; ++chan->if_send_entry; if (dev->tbusy) { /* If our device stays busy for at least 5 seconds then we will * kick start the device by making dev->tbusy = 0. We expect * that our device never stays busy more than 5 seconds. So this * is only used as a last resort. */ ++chan->if_send_busy; ++chan->ifstats.collisions; if ((jiffies - chan->tick_counter) < (5 * HZ)) return 1; printk(KERN_INFO "%s: Transmit timed out\n", chan->name); ++chan->if_send_busy_timeout; /* unbusy all the interfaces on the card */ for (dev2 = card->wandev.dev; dev2; dev2 = dev2->slave) dev2->tbusy = 0; } sendpacket = skb->data; udp_type = udp_pkt_type(skb, card); if (udp_type == UDP_DRVSTATS_TYPE) { ++chan->if_send_DRVSTATS_request; process_udp_driver_call(UDP_PKT_FRM_STACK, card, skb, dev, 0, chan); dev_kfree_skb(skb); return 0; } else if (udp_type == UDP_FPIPE_TYPE) ++chan->if_send_FPIPE_request; /* retreive source address in two forms: broadcast & multicast */ check_braddr = sendpacket[17]; check_mcaddr = sendpacket[14]; check_braddr = check_braddr << 8; check_mcaddr = check_mcaddr << 8; check_braddr |= sendpacket[16]; check_mcaddr |= sendpacket[15]; check_braddr = check_braddr << 8; check_mcaddr = check_mcaddr << 8; check_braddr |= sendpacket[15]; check_mcaddr |= sendpacket[16]; check_braddr = check_braddr << 8; check_mcaddr = check_mcaddr << 8; check_braddr |= sendpacket[14]; check_mcaddr |= sendpacket[17]; /* if the Source Address is a Multicast address */ if ((chan->mc == WANOPT_NO) && (check_mcaddr >= 0xE0000001) && (check_mcaddr <= 0xFFFFFFFE)) { printk(KERN_INFO "%s: Multicast Src. Addr. silently discarded\n" ,card->devname); dev_kfree_skb(skb); ++chan->ifstats.tx_dropped; ++chan->if_send_multicast; return 0; } disable_irq(card->hw.irq); ++card->irq_dis_if_send_count; if (test_and_set_bit(0, (void *) &card->wandev.critical)) { if (card->wandev.critical == CRITICAL_IN_ISR) { ++chan->if_send_critical_ISR; if (card->intr_mode == DLCI_LIST_INTR_MODE) { /* The enable_tx_int flag is set here so that if * the critical flag is set due to an interrupt * then we want to enable transmit interrupts * again. */ card->wandev.enable_tx_int = 1; /* Setting this flag to WAITING_TO_BE_ENABLED * specifies that interrupt bit has to be * enabled for that particular interface. * (delayed interrupt) */ chan->tx_int_status = WAITING_TO_BE_ENABLED; /* This is used for enabling dynamic calculation * of CIRs relative to the packet length. */ chan->pkt_length = skb->len; dev->tbusy = 1; chan->tick_counter = jiffies; } else { card->wandev.enable_tx_int = 1; dev->tbusy = 1; chan->tick_counter = jiffies; } save_flags(host_cpu_flags); cli(); if ((!(--card->irq_dis_if_send_count)) && (!card->irq_dis_poll_count)) enable_irq(card->hw.irq); restore_flags(host_cpu_flags); return 1; } ++chan->if_send_critical_non_ISR; ++chan->ifstats.tx_dropped; dev_kfree_skb(skb); save_flags(host_cpu_flags); cli(); if ((!(--card->irq_dis_if_send_count)) && (!card->irq_dis_poll_count)) enable_irq(card->hw.irq); restore_flags(host_cpu_flags); return 0; } card->wandev.critical = 0x21; if (udp_type == UDP_FPIPE_TYPE) { err = process_udp_mgmt_pkt(UDP_PKT_FRM_STACK, card, skb, dev, 0, chan); } else if (card->wandev.state != WAN_CONNECTED) { ++chan->if_send_wan_disconnected; ++chan->ifstats.tx_dropped; ++card->wandev.stats.tx_dropped; } else if (chan->state != WAN_CONNECTED) { ++chan->if_send_dlci_disconnected; update_chan_state(dev); ++chan->ifstats.tx_dropped; ++card->wandev.stats.tx_dropped; } else if (!is_tx_ready(card, chan)) { if (card->intr_mode == DLCI_LIST_INTR_MODE) { dlci_interface->gen_interrupt |= 0x40; dlci_interface->packet_length = skb->len; } dev->tbusy = 1; chan->tick_counter = jiffies; adptr_flags->imask |= 0x02; ++chan->if_send_no_bfrs; retry = 1; } else { send_data = 1; /* If it's an IPX packet */ if (sendpacket[1] == 0x00 && sendpacket[2] == 0x80 && sendpacket[6] == 0x81 && sendpacket[7] == 0x37) { if (card->wandev.enable_IPX) { switch_net_numbers(sendpacket, card->wandev.network_number, 0); } else { /* increment some statistic here! */ send_data = 0; } } if (send_data) { err = (card->hw.fwid == SFID_FR508) ? fr508_send(card, chan->dlci, 0, skb->len, skb->data) : fr502_send(card, chan->dlci, 0, skb->len, skb->data); if (err) { if (card->intr_mode == DLCI_LIST_INTR_MODE) { dlci_interface->gen_interrupt |= 0x40; dlci_interface->packet_length = skb->len; } dev->tbusy = 1; chan->tick_counter = jiffies; adptr_flags->imask |= 0x02; retry = 1; ++chan->if_send_adptr_bfrs_full; ++chan->ifstats.tx_errors; ++card->wandev.stats.tx_errors; } else { ++chan->if_send_bfrs_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; } } } if (!retry) dev_kfree_skb(skb); card->wandev.critical = 0; save_flags(host_cpu_flags); cli(); if ((!(--card->irq_dis_if_send_count)) && (!card->irq_dis_poll_count)) enable_irq(card->hw.irq); restore_flags(host_cpu_flags); return retry; } /*============================================================================ * Reply to UDP Management system. * Return nothing. */ static int reply_udp(unsigned char *data, unsigned int mbox_len) { unsigned short len, udp_length, temp, i, ip_length; unsigned long sum; /* Set length of packet */ len = mbox_len + 62; /* fill in UDP reply */ data[38] = 0x02; /* fill in UDP length */ udp_length = mbox_len + 40; /* put it on an even boundary */ if (udp_length & 0x0001) { udp_length += 1; len += 1; } temp = (udp_length << 8) | (udp_length >> 8); memcpy(&data[26], &temp, 2); /* swap UDP ports */ memcpy(&temp, &data[22], 2); memcpy(&data[22], &data[24], 2); memcpy(&data[24], &temp, 2); /* add UDP pseudo header */ temp = 0x1100; memcpy(&data[udp_length + 22], &temp, 2); temp = (udp_length << 8) | (udp_length >> 8); memcpy(&data[udp_length + 24], &temp, 2); /* calculate UDP checksum */ data[28] = data[29] = 0; sum = 0; for (i = 0; i < udp_length + 12; i += 2) { memcpy(&temp, &data[14 + 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; memcpy(&data[28], &temp, 2); /* fill in IP length */ ip_length = udp_length + 20; temp = (ip_length << 8) | (ip_length >> 8); memcpy(&data[4], &temp, 2); /* swap IP addresses */ memcpy(&temp, &data[14], 2); memcpy(&data[14], &data[18], 2); memcpy(&data[18], &temp, 2); memcpy(&temp, &data[16], 2); memcpy(&data[16], &data[20], 2); memcpy(&data[20], &temp, 2); /* fill in IP checksum */ data[12] = data[13] = 0; sum = 0; for (i = 0; i < 20; i += 2) { memcpy(&temp, &data[2 + 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; memcpy(&data[12], &temp, 2); return len; } /* reply_udp */ /* 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 net_device_stats. */ static struct net_device_stats *if_stats(struct device *dev) { fr_channel_t *chan = dev->priv; if(chan==NULL) return NULL; return &chan->ifstats; } /****** Interrupt Handlers **************************************************/ /*============================================================================ * S502 frame relay interrupt service routine. */ static void fr502_isr(sdla_t * card) { fr502_flags_t *flags = card->flags; switch (flags->iflag) { case 0x01: /* receive interrupt */ fr502_rx_intr(card); break; case 0x02: /* transmit interrupt */ flags->imask &= ~0x02; tx_intr(card); break; default: spur_intr(card); } flags->iflag = 0; } /*============================================================================ * S508 frame relay interrupt service routine. */ static void fr508_isr(sdla_t * card) { fr508_flags_t *flags = card->flags; fr_buf_ctl_t *bctl; char *ptr = &flags->iflag; struct device *dev = card->wandev.dev; struct device *dev2; int i; unsigned long host_cpu_flags; unsigned disable_tx_intr = 1; fr_channel_t *chan; fr_dlci_interface_t *dlci_interface; /* This flag prevents nesting of interrupts. See sdla_isr() routine * in sdlamain.c. */ card->in_isr = 1; ++card->statistics.isr_entry; if (test_and_set_bit(0, (void *) &card->wandev.critical)) { printk(KERN_INFO "fr508_isr: %s, wandev.critical set to 0x%02X, int type = 0x%02X\n", card->devname, card->wandev.critical, flags->iflag); ++card->statistics.isr_already_critical; card->in_isr = 0; return; } /* For all interrupts set the critical flag to CRITICAL_RX_INTR. * If the if_send routine is called with this flag set it will set * the enable transmit flag to 1. (for a delayed interrupt) */ card->wandev.critical = CRITICAL_IN_ISR; card->dlci_int_mode_unbusy = 0; card->buff_int_mode_unbusy = 0; switch (flags->iflag) { case 0x01: /* receive interrupt */ ++card->statistics.isr_rx; fr508_rx_intr(card); break; case 0x02: /* transmit interrupt */ ++card->statistics.isr_tx; bctl = (void *) (flags->tse_offs - FR_MB_VECTOR + card->hw.dpmbase); bctl->flag = 0xA0; if (card->intr_mode == DLCI_LIST_INTR_MODE) { /* Find the structure and make it unbusy */ dev = find_channel(card, flags->dlci); dev->tbusy = 0; /* This is used to perform devtint at the * end of the isr */ card->dlci_int_mode_unbusy = 1; /* check to see if any other interfaces are * busy. If so then do not disable the tx * interrupts */ for (dev2 = card->wandev.dev; dev2; dev2 = dev2->slave) { if (dev2->tbusy == 1) { disable_tx_intr = 0; break; } } if (disable_tx_intr) flags->imask &= ~0x02; } else if (card->intr_mode == BUFFER_INTR_MODE) { for (dev2 = card->wandev.dev; dev2; dev2 = dev2->slave) { if (!dev2 || !dev2->start) { ++card->statistics.tx_intr_dev_not_started; continue; } if (dev2->tbusy) { card->buff_int_mode_unbusy = 1; ((fr_channel_t *) dev2->priv)->dev_pending_devtint = 1; dev2->tbusy = 0; } else ((fr_channel_t *) dev2->priv)->dev_pending_devtint = 0; } flags->imask &= ~0x02; } break; case 0x08: Intr_test_counter++; ++card->statistics.isr_intr_test; 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; } card->wandev.critical = CRITICAL_INTR_HANDLED; if (card->wandev.enable_tx_int) { if (card->intr_mode == DLCI_LIST_INTR_MODE) { for (dev2 = card->wandev.dev; dev2; dev2 = dev2->slave) { chan = dev2->priv; if (chan->tx_int_status == WAITING_TO_BE_ENABLED) { dlci_interface = chan->dlci_int_interface; dlci_interface->gen_interrupt |= 0x40; dlci_interface->packet_length = chan->pkt_length; chan->tx_int_status = DISABLED; } } } card->wandev.enable_tx_int = 0; flags->imask |= 0x02; ++card->statistics.isr_enable_tx_int; } save_flags(host_cpu_flags); cli(); card->in_isr = 0; card->wandev.critical = 0xD1; flags->iflag = 0; card->wandev.critical = 0; restore_flags(host_cpu_flags); /* Device is now ready to send. The instant this is executed the If_Send routine is called. That is why this is put at the bottom of the ISR to prevent a endless loop condition caused by repeated Interrupts and enable_tx_int flag. */ if (card->dlci_int_mode_unbusy) mark_bh(NET_BH); if (card->buff_int_mode_unbusy) { for (;;) { if (((fr_channel_t *) ((card->devs_struct)->dev_ptr)->priv)->dev_pending_devtint == 1) { ((fr_channel_t *) ((card->devs_struct)->dev_ptr)->priv)->dev_pending_devtint = 0; mark_bh(NET_BH); } if ((card->devs_struct)->next == card->dev_to_devtint_next) break; card->devs_struct = (card->devs_struct)->next; } card->devs_struct = (card->dev_to_devtint_next)->next; card->dev_to_devtint_next = card->devs_struct; } } /*============================================================================ * Receive interrupt handler. */ static void fr502_rx_intr(sdla_t * card) { fr_mbox_t *mbox = card->rxmb; struct sk_buff *skb; struct device *dev; fr_channel_t *chan; unsigned dlci, len; void *buf; unsigned char *sendpacket; unsigned char buf2[3]; int udp_type; sdla_mapmem(&card->hw, FR502_RX_VECTOR); dlci = mbox->cmd.dlci; len = mbox->cmd.length; /* Find network interface for this packet */ dev = find_channel(card, dlci); if (dev == NULL) { /* Invalid channel, discard packet */ printk(KERN_INFO "%s: receiving on orphaned DLCI %d!\n", card->devname, dlci); sdla_mapmem(&card->hw, FR_MB_VECTOR); } chan = dev->priv; if (!dev->start) { ++chan->ifstats.rx_dropped; sdla_mapmem(&card->hw, FR_MB_VECTOR); } /* Allocate socket buffer */ skb = dev_alloc_skb(len); if (skb == NULL) { printk(KERN_INFO "%s: no socket buffers available!\n", card->devname); ++chan->ifstats.rx_dropped; sdla_mapmem(&card->hw, FR_MB_VECTOR); } /* Copy data to the socket buffer */ buf = skb_put(skb, len); memcpy(buf, mbox->data, len); sdla_mapmem(&card->hw, FR_MB_VECTOR); /* Check if it's a UDP management packet */ sendpacket = skb->data; memcpy(&buf2, &card->wandev.udp_port, 2); udp_type = udp_pkt_type(skb, card); if ((udp_type == UDP_FPIPE_TYPE) || (udp_type == UDP_DRVSTATS_TYPE)) { if (udp_type == UDP_DRVSTATS_TYPE) { ++chan->rx_intr_DRVSTATS_request; process_udp_driver_call(UDP_PKT_FRM_NETWORK, card, skb, dev, dlci, chan); } else { ++chan->rx_intr_FPIPE_request; process_udp_mgmt_pkt(UDP_PKT_FRM_NETWORK, card, skb, dev, dlci, chan); } } else { /* Decapsulate packet and pass it up the protocol stack */ skb->dev = dev; buf = skb_pull(skb, 1); /* remove hardware header */ if (!wanrouter_type_trans(skb, dev)) { /* can't decapsulate packet */ dev_kfree_skb(skb); ++chan->ifstats.rx_errors; ++card->wandev.stats.rx_errors; } else { netif_rx(skb); ++chan->ifstats.rx_packets; ++card->wandev.stats.rx_packets; chan->ifstats.rx_bytes += skb->len; card->wandev.stats.rx_bytes += skb->len; } } sdla_mapmem(&card->hw, FR_MB_VECTOR); } /*============================================================================ * Receive interrupt handler. */ static void fr508_rx_intr(sdla_t * card) { fr_buf_ctl_t *frbuf = card->rxmb; struct sk_buff *skb; struct device *dev; fr_channel_t *chan; unsigned dlci, len, offs; void *buf; unsigned rx_count = 0; fr508_flags_t *flags = card->flags; char *ptr = &flags->iflag; int i, err, udp_type; 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; return; } do { len = frbuf->length; dlci = frbuf->dlci; offs = frbuf->offset; /* Find network interface for this packet */ dev = find_channel(card, dlci); chan = dev->priv; if (dev == NULL) { /* Invalid channel, discard packet */ printk(KERN_INFO "%s: receiving on orphaned DLCI %d!\n" ,card->devname, dlci); ++card->statistics.rx_intr_on_orphaned_DLCI; } else { skb = dev_alloc_skb(len); if (!dev->start || (skb == NULL)) { ++chan->ifstats.rx_dropped; if (dev->start) { printk(KERN_INFO "%s: no socket buffers available!\n", card->devname); ++chan->rx_intr_no_socket; } else ++chan->rx_intr_dev_not_started; } else { /* Copy data to 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); udp_type = udp_pkt_type(skb, card); if (udp_type == UDP_DRVSTATS_TYPE) { ++chan->rx_intr_DRVSTATS_request; process_udp_driver_call( UDP_PKT_FRM_NETWORK, card, skb, dev, dlci, chan); } else if (udp_type == UDP_FPIPE_TYPE) { ++chan->rx_intr_FPIPE_request; err = process_udp_mgmt_pkt( UDP_PKT_FRM_NETWORK, card, skb, dev, dlci, chan); } else if (handle_IPXWAN(skb->data, card->devname, card->wandev.enable_IPX, card->wandev.network_number)) { if (card->wandev.enable_IPX) fr508_send(card, dlci, 0, skb->len, skb->data); } else { /* Decapsulate packet and pass it up the protocol stack */ skb->dev = dev; /* remove hardware header */ buf = skb_pull(skb, 1); if (!wanrouter_type_trans(skb, dev)) { /* can't decapsulate packet */ dev_kfree_skb(skb); ++chan-> rx_intr_bfr_not_passed_to_stack; ++chan-> ifstats.rx_errors; ++card-> wandev.stats.rx_errors; } else { netif_rx(skb); ++chan->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; } } } } /* 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; /* The loop put in is temporary, that is why the break is * placed here. (?????) */ break; frbuf = card->rxmb; } while (frbuf->flag && ((++rx_count) < 4)); } /*============================================================================ * Transmit interrupt handler. * o print a warning * o * If number of spurious interrupts exceeded some limit, then ??? */ static void tx_intr(sdla_t * card) { struct device *dev = card->wandev.dev; if (card->intr_mode == BUFFER_INTR_MODE) { for (; dev; dev = dev->slave) { if (!dev || !dev->start) { ++card->statistics.tx_intr_dev_not_started; continue; } dev->tbusy = 0; mark_bh(NET_BH); } } else { dev->tbusy = 0; mark_bh(NET_BH); } } /*============================================================================ * Spurious interrupt handler. * o print a warning * o * If number of spurious interrupts exceeded some limit, then ??? */ static void spur_intr(sdla_t * card) { printk(KERN_INFO "%s: spurious interrupt!\n", card->devname); } /* Return 0 for non-IPXWAN packet 1 for IPXWAN packet or IPX is not enabled! */ 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. */ 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, its 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; } /****** Background Polling Routines ****************************************/ /*============================================================================ * Main polling routine. * This routine is repeatedly called by the WANPIPE 'thead' to allow for * time-dependent housekeeping work. * * o fetch asynchronous network events. * * Notes: * 1. This routine may be called on interrupt context with all interrupts * enabled. Beware! */ static void wpf_poll(sdla_t * card) { /* struct device* dev = card->wandev.dev; */ fr508_flags_t *flags = card->flags; unsigned long host_cpu_flags; ++card->statistics.poll_entry; if (((jiffies - card->state_tick) < HZ) || (card->intr_mode == INTR_TEST_MODE)) return; disable_irq(card->hw.irq); ++card->irq_dis_poll_count; if (test_and_set_bit(0, (void *) &card->wandev.critical)) { ++card->statistics.poll_already_critical; save_flags(host_cpu_flags); cli(); if ((!card->irq_dis_if_send_count) && (!(--card->irq_dis_poll_count))) enable_irq(card->hw.irq); restore_flags(host_cpu_flags); return; } card->wandev.critical = 0x11; ++card->statistics.poll_processed; /* This is to be changed later ??? */ /* if( dev && dev->tbusy && !(flags->imask & 0x02) ) { printk(KERN_INFO "%s: Wpf_Poll: tbusy = 0x01, imask = 0x%02X\n", card->devname, flags->imask); } */ if (flags->event) { fr_mbox_t *mbox = card->mbox; int err; memset(&mbox->cmd, 0, sizeof(fr_cmd_t)); mbox->cmd.command = FR_READ_STATUS; err = sdla_exec(mbox) ? mbox->cmd.result : CMD_TIMEOUT; if (err) fr_event(card, err, mbox); } card->wandev.critical = 0; save_flags(host_cpu_flags); cli(); if ((!card->irq_dis_if_send_count) && (!(--card->irq_dis_poll_count))) enable_irq(card->hw.irq); restore_flags(host_cpu_flags); card->state_tick = jiffies; } /****** 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 { memset(&mbox->cmd, 0, sizeof(fr_cmd_t)); mbox->cmd.command = FR_READ_CODE_VERSION; 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 { memset(&mbox->cmd, 0, sizeof(fr_cmd_t)); 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)); 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 { memset(&mbox->cmd, 0, sizeof(fr_cmd_t)); memcpy(mbox->data, conf, sizeof(fr_dlc_conf_t)); mbox->cmd.dlci = (unsigned short) dlci; mbox->cmd.command = FR_SET_CONFIG; mbox->cmd.length = 0x0E; 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) { fr_mbox_t *mbox = card->mbox; int retry = MAX_CMD_RETRY; int err; do { memset(&mbox->cmd, 0, sizeof(fr_cmd_t)); if (card->hw.fwid == SFID_FR502) { fr502_intr_ctl_t *ictl = (void *) mbox->data; memset(ictl, 0, sizeof(fr502_intr_ctl_t)); ictl->mode = mode; ictl->tx_len = mtu; mbox->cmd.length = sizeof(fr502_intr_ctl_t); } else { fr508_intr_ctl_t *ictl = (void *) mbox->data; memset(ictl, 0, sizeof(fr508_intr_ctl_t)); ictl->mode = mode; ictl->tx_len = mtu; ictl->irq = card->hw.irq; 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 { memset(&mbox->cmd, 0, sizeof(fr_cmd_t)); mbox->cmd.command = FR_COMM_ENABLE; err = sdla_exec(mbox) ? mbox->cmd.result : CMD_TIMEOUT; } while (err && retry-- && fr_event(card, err, mbox)); return err; } /*============================================================================ * Disable communications. */ static int fr_comm_disable(sdla_t * card) { fr_mbox_t *mbox = card->mbox; int retry = MAX_CMD_RETRY; int err; do { memset(&mbox->cmd, 0, sizeof(fr_cmd_t)); mbox->cmd.command = FR_COMM_DISABLE; err = sdla_exec(mbox) ? mbox->cmd.result : CMD_TIMEOUT; } while (err && retry-- && fr_event(card, err, mbox)); return err; } /*============================================================================ * 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 { memset(&mbox->cmd, 0, sizeof(fr_cmd_t)); mbox->cmd.command = FR_READ_ERROR_STATS; 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 { memset(&mbox->cmd, 0, sizeof(fr_cmd_t)); mbox->cmd.command = FR_READ_STATISTICS; 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, int num) { fr_mbox_t *mbox = card->mbox; int retry = MAX_CMD_RETRY; int err, i; do { unsigned short *dlci_list = (void *) mbox->data; memset(&mbox->cmd, 0, sizeof(fr_cmd_t)); for (i = 0; i < num; ++i) dlci_list[i] = card->u.f.node_dlci[i]; mbox->cmd.length = num * sizeof(short); 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 list of DLCIs. */ static int fr_activate_dlci(sdla_t * card, int dlci, int num) { fr_mbox_t *mbox = card->mbox; int retry = MAX_CMD_RETRY; int err, i; do { unsigned short *dlci_list = (void *) mbox->data; memset(&mbox->cmd, 0, sizeof(fr_cmd_t)); for (i = 0; i < num; ++i) dlci_list[i] = card->u.f.node_dlci[i]; mbox->cmd.length = num * sizeof(short); 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; } /*============================================================================ * 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 { memset(&mbox->cmd, 0, sizeof(fr_cmd_t)); 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; } /*============================================================================ * Send a frame (S502 version). */ static int fr502_send(sdla_t * card, int dlci, int attr, int len, void *buf) { fr_mbox_t *mbox = card->mbox; int retry = MAX_CMD_RETRY; int err; do { memset(&mbox->cmd, 0, sizeof(fr_cmd_t)); memcpy(mbox->data, buf, len); 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)); return err; } /*============================================================================ * Send a frame (S508 version). */ static int fr508_send(sdla_t * card, int dlci, int attr, int len, void *buf) { fr_mbox_t *mbox = card->mbox; int retry = MAX_CMD_RETRY; int err; do { memset(&mbox->cmd, 0, sizeof(fr_cmd_t)); 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_buf_ctl_t *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 asynchronous 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: wanpipe_set_state(card, WAN_DISCONNECTED); return 1; case FRRES_CHANNEL_UP: 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 + 0x28 + i)); printk(KERN_INFO "\n"); break; case FRRES_DLCI_INACTIVE: printk(KERN_ERR "%s: DLCI %u is inactive!\n", card->devname, mbox->cmd.dlci); 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_dlc_conf_t cfg; fr_channel_t *chan; struct device *dev2; for (; cnt; --cnt, ++status) { unsigned short dlci = status->dlci; struct device *dev = find_channel(card, dlci); if (dev == NULL) { printk(KERN_INFO "%s: CPE contains unconfigured DLCI= %d\n", card->devname, dlci); } else { if (status->state & 0x01) { printk(KERN_INFO "%s: DLCI %u has been deleted!\n", card->devname, dlci); if (dev && dev->start) set_chan_state(dev, WAN_DISCONNECTED); } else if (status->state & 0x02) { printk(KERN_INFO "%s: DLCI %u becomes active!\n", card->devname, dlci); chan = dev->priv; /* This flag is used for configuring specific DLCI(s) when they become active. */ chan->dlci_configured = DLCI_CONFIG_PENDING; if (dev && dev->start) set_chan_state(dev, WAN_CONNECTED); } } } for (dev2 = card->wandev.dev; dev2; dev2 = dev2->slave) { chan = dev2->priv; if (chan->dlci_configured == DLCI_CONFIG_PENDING) { 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; printk(KERN_INFO "%s: CIR Disabled for %s\n", card->devname, chan->name); } 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; printk(KERN_INFO "%s: CIR Enabled for %s\n", card->devname, chan->name); } 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. */ if (card->intr_mode == DLCI_LIST_INTR_MODE) read_DLCI_IB_mapping(card, chan); } } return 1; } /******* Miscellaneous ******************************************************/ /*============================================================================ * Update channel state. */ static int update_chan_state(struct 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; int dlci_found = 0; do { memset(&mbox->cmd, 0, sizeof(fr_cmd_t)); mbox->cmd.command = FR_LIST_ACTIVE_DLCI; 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); for (; cnt; --cnt, ++list) { if (*list == chan->dlci) { dlci_found = 1; set_chan_state(dev, WAN_CONNECTED); break; } } if (!dlci_found) printk(KERN_INFO "%s: DLCI %u is inactive\n", card->devname, chan->dlci); } return err; } /*============================================================================ * Set channel state. */ static void set_chan_state(struct device *dev, int state) { fr_channel_t *chan = dev->priv; sdla_t *card = chan->card; unsigned long flags; save_flags(flags); cli(); if (chan->state != state) { switch (state) { case WAN_CONNECTED: printk(KERN_INFO "%s: interface %s connected!\n" ,card->devname, dev->name); break; case WAN_CONNECTING: printk(KERN_INFO "%s: interface %s connecting...\n", card->devname, dev->name); break; case WAN_DISCONNECTED: printk(KERN_INFO "%s: interface %s disconnected!\n", card->devname, dev->name); break; } chan->state = state; } chan->state_tick = jiffies; restore_flags(flags); } /*============================================================================ * Find network device by its channel number. */ static struct device *find_channel(sdla_t * card, unsigned dlci) { struct device *dev; for (dev = card->wandev.dev; dev; dev = dev->slave) if (((fr_channel_t *) dev->priv)->dlci == dlci) break; return dev; } /*============================================================================ * 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) { if (card->hw.fwid == SFID_FR508) { unsigned char sb = inb(card->hw.port); if (sb & 0x02) return 1; } else { fr502_flags_t *flags = card->flags; if (flags->tx_ready) return 1; flags->imask |= 0x02; } 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; } /*============================================================================== * Process UDP call of type FPIPE8ND */ static int process_udp_mgmt_pkt(char udp_pkt_src, sdla_t * card, struct sk_buff *skb, struct device *dev, int dlci, fr_channel_t * chan) { int c_retry = MAX_CMD_RETRY; unsigned char *data; unsigned char *buf; unsigned char buf2[5]; unsigned int loops, frames, len; unsigned long data_ptr; unsigned short real_len, buffer_length; struct sk_buff *new_skb; unsigned char *sendpacket; fr_mbox_t *mbox = card->mbox; int err; struct timeval tv; int udp_mgmt_req_valid = 1; sendpacket = skb->data; memcpy(&buf2, &card->wandev.udp_port, 2); if ((data = kmalloc(2000, GFP_ATOMIC)) == NULL) { printk(KERN_INFO "%s: Error allocating memory for UDP management cmnd 0x%02X", card->devname, data[47]); ++chan->UDP_FPIPE_mgmt_kmalloc_err; return 1; } memcpy(data, sendpacket, skb->len); switch (data[47]) { /* FPIPE_ENABLE_TRACE */ case 0x41: /* FPIPE_DISABLE_TRACE */ case 0x42: /* FPIPE_GET_TRACE_INFO */ case 0x43: /* SET FT1 MODE */ case 0x81: if (udp_pkt_src == UDP_PKT_FRM_NETWORK) { ++chan->UDP_FPIPE_mgmt_direction_err; udp_mgmt_req_valid = 0; break; } /* FPIPE_FT1_READ_STATUS */ case 0x44: /* FT1 MONITOR STATUS */ case 0x80: if (card->hw.fwid != SFID_FR508) { ++chan->UDP_FPIPE_mgmt_adptr_type_err; udp_mgmt_req_valid = 0; } break; default: break; } if (!udp_mgmt_req_valid) { /* set length to 0 */ data[48] = data[49] = 0; /* set return code */ data[50] = (card->hw.fwid != SFID_FR508) ? 0x1F : 0xCD; } else { switch (data[47]) { /* FPIPE_ENABLE_TRACE */ case 0x41: if (!TracingEnabled) { do { /* SET_TRACE_CONFIGURATION */ mbox->cmd.command = 0x60; mbox->cmd.length = 1; mbox->cmd.dlci = 0x00; mbox->data[0] = 0x37; err = sdla_exec(mbox) ? mbox->cmd.result : CMD_TIMEOUT; } while (err && c_retry-- && fr_event(card, err, mbox)); if (err) { TracingEnabled = 0; /* set the return code */ data[50] = mbox->cmd.result; mbox->cmd.length = 0; break; } /* get num_frames */ sdla_peek(&card->hw, 0x9000, &num_frames, 2); sdla_peek(&card->hw, 0x9002, &curr_trace_addr,4); start_trace_addr = curr_trace_addr; /* MAX_SEND_BUFFER_SIZE - * sizeof(UDP_MGMT_PACKET) - 41 */ available_buffer_space = 1926; /* set return code */ data[50] = 0; } else { /* set return code to line trace already enabled */ data[50] = 1; } mbox->cmd.length = 0; TracingEnabled = 1; break; /* FPIPE_DISABLE_TRACE */ case 0x42: if (TracingEnabled) { do { /* SET_TRACE_CONFIGURATION */ mbox->cmd.command = 0x60; mbox->cmd.length = 1; mbox->cmd.dlci = 0x00; mbox->data[0] = 0x36; err = sdla_exec(mbox) ? mbox->cmd.result : CMD_TIMEOUT; } while (err && c_retry-- && fr_event(card, err, mbox)); } /* set return code */ data[50] = 0; mbox->cmd.length = 0; TracingEnabled = 0; break; /* FPIPE_GET_TRACE_INFO */ case 0x43: /* Line trace cannot be performed on the 502 */ if (!TracingEnabled) { /* set return code */ data[50] = 1; mbox->cmd.length = 0; break; } buffer_length = 0; loops = (num_frames < 20) ? num_frames : 20; for (frames = 0; frames < loops; frames += 1) { sdla_peek(&card->hw, curr_trace_addr, &buf2, 1); /* no data on board so exit */ if (buf2[0] == 0x00) break; /* 1+sizeof(FRAME_DATA) = 9 */ if ((available_buffer_space - buffer_length) < 9) { /* indicate we have more frames on board and exit */ data[62] |= 0x02; break; } /* get frame status */ sdla_peek(&card->hw, curr_trace_addr + 0x05, &data[62 + buffer_length], 1); /* get time stamp */ sdla_peek(&card->hw, curr_trace_addr + 0x06, &data[66 + buffer_length], 2); /* get frame length */ sdla_peek(&card->hw, curr_trace_addr + 0x01, &data[64 + buffer_length], 2); /* get pointer to real data */ sdla_peek(&card->hw, curr_trace_addr + 0x0C,&data_ptr, 4); /* see if we can fit the frame into the user buffer */ memcpy(&real_len, &data[64 + buffer_length], 2); if (data_ptr == 0 || real_len + 8 > available_buffer_space) { data[63 + buffer_length] = 0x00; } else { /* we can take it next time */ if (available_buffer_space - buffer_length < real_len + 8) { data[62] |= 0x02; break; } /* ok, get the frame */ data[63 + buffer_length] = 0x01; /* get the data */ sdla_peek(&card->hw, data_ptr, &data[68 + buffer_length], real_len); /* zero the opp flag to show we got the frame */ buf2[0] = 0x00; sdla_poke(&card->hw, curr_trace_addr, &buf2, 1); /* now move onto the next frame */ curr_trace_addr += 16; /* check if we passed the last address */ if (curr_trace_addr >= (start_trace_addr + num_frames * 16)) curr_trace_addr = start_trace_addr; /* update buffer length and make sure its even */ if (data[63 + buffer_length] == 0x01) buffer_length += real_len - 1; /* for the header */ buffer_length += 8; if (buffer_length & 0x0001) buffer_length += 1; } } /* ok now set the total number of frames passed in the high 5 bits */ data[62] = (frames << 3) | data[62]; /* set the data length */ mbox->cmd.length = buffer_length; memcpy(&data[48], &buffer_length, 2); data[50] = 0; break; /* FPIPE_FT1_READ_STATUS */ case 0x44: sdla_peek(&card->hw, 0xF020, &data[62], 2); data[48] = 2; data[49] = 0; data[50] = 0; mbox->cmd.length = 2; break; /* FPIPE_FLUSH_DRIVER_STATS */ case 0x48: init_chan_statistics(chan); init_global_statistics(card); mbox->cmd.length = 0; break; case 0x49: do_gettimeofday(&tv); chan->router_up_time = tv.tv_sec - chan->router_start_time; *(unsigned long *) &data[62] = chan->router_up_time; mbox->cmd.length = 4; break; /* FPIPE_KILL_BOARD */ case 0x50: break; /* FT1 MONITOR STATUS */ case 0x80: if (data[62] == 1) { if (rCount++ != 0) { data[50] = 0; mbox->cmd.length = 1; break; } } /* Disable FT1 MONITOR STATUS */ if (data[62] == 0) { if (--rCount != 0) { data[50] = 0; mbox->cmd.length = 1; break; } } default: do { memcpy(&mbox->cmd, &sendpacket[47], sizeof(fr_cmd_t)); if (mbox->cmd.length) memcpy(&mbox->data, &sendpacket[62],mbox->cmd.length); err = sdla_exec(mbox) ? mbox->cmd.result : CMD_TIMEOUT; } while (err && c_retry-- && fr_event(card, err, mbox)); if (!err) { ++chan->UDP_FPIPE_mgmt_adptr_cmnd_OK; memcpy(data, sendpacket, skb->len); memcpy(&data[47], &mbox->cmd, sizeof(fr_cmd_t)); if (mbox->cmd.length) { memcpy(&data[62], &mbox->data,mbox->cmd.length); } } else { ++chan->UDP_FPIPE_mgmt_adptr_cmnd_timeout; } } } /* Fill UDP TTL */ data[10] = card->wandev.ttl; len = reply_udp(data, mbox->cmd.length); if (udp_pkt_src == UDP_PKT_FRM_NETWORK) { err = fr508_send(card, dlci, 0, len, data); if (err) ++chan->UDP_FPIPE_mgmt_adptr_send_passed; else ++chan->UDP_FPIPE_mgmt_adptr_send_failed; dev_kfree_skb(skb); } 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, data, len); /* Decapsulate packet and pass it up the protocol stack */ new_skb->dev = dev; buf = skb_pull(new_skb, 1); /* remove hardware header */ if (!wanrouter_type_trans(new_skb, dev)) { ++chan->UDP_FPIPE_mgmt_not_passed_to_stack; /* can't decapsulate packet */ dev_kfree_skb(new_skb); } else { ++chan->UDP_FPIPE_mgmt_passed_to_stack; netif_rx(new_skb); } } else { ++chan->UDP_FPIPE_mgmt_no_socket; printk(KERN_INFO "%s: UDP mgmt cmnd, no socket buffers available!\n", card->devname); } } kfree(data); return 0; } /*============================================================================== * 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; /* The critical flag is unset here because we want to get into the ISR without the flag already set. The If_open sets the flag. */ card->wandev.critical = 0; err = fr_set_intr_mode(card, 0x08, card->wandev.mtu); if (err == CMD_OK) { for (i = 0; i < MAX_INTR_TEST_COUNTER; i++) { /* Run command READ_CODE_VERSION */ memset(&mb->cmd, 0, sizeof(fr_cmd_t)); mb->cmd.length = 0; mb->cmd.command = 0x40; 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); if (err != CMD_OK) return err; card->wandev.critical = 1; return 0; } /*============================================================================ * Process UDP call of type DRVSTATS. */ static int process_udp_driver_call(char udp_pkt_src, sdla_t * card, struct sk_buff *skb, struct device *dev, int dlci, fr_channel_t * chan) { int c_retry = MAX_CMD_RETRY; unsigned char *sendpacket; unsigned char buf2[5]; unsigned char *data; unsigned char *buf; unsigned int len; fr_mbox_t *mbox = card->mbox; struct sk_buff *new_skb; int err; sendpacket = skb->data; memcpy(&buf2, &card->wandev.udp_port, 2); if ((data = kmalloc(2000, GFP_ATOMIC)) == NULL) { printk(KERN_INFO "%s: Error allocating memory for UDP DRIVER STATS cmnd0x%02X" ,card->devname, data[45]); ++chan->UDP_DRVSTATS_mgmt_kmalloc_err; return 1; } memcpy(data, sendpacket, skb->len); switch (data[47]) { case 0x45: *(unsigned long *) &data[62] = chan->if_send_entry; *(unsigned long *) &data[66] = chan->if_send_skb_null; *(unsigned long *) &data[70] = chan->if_send_broadcast; *(unsigned long *) &data[74] = chan->if_send_multicast; *(unsigned long *) &data[78] = chan->if_send_critical_ISR; *(unsigned long *) &data[82] = chan->if_send_critical_non_ISR; *(unsigned long *) &data[86] = chan->if_send_busy; *(unsigned long *) &data[90] = chan->if_send_busy_timeout; *(unsigned long *) &data[94] = chan->if_send_DRVSTATS_request; *(unsigned long *) &data[98] = chan->if_send_FPIPE_request; *(unsigned long *) &data[102] = chan->if_send_wan_disconnected; *(unsigned long *) &data[106] = chan->if_send_dlci_disconnected; *(unsigned long *) &data[110] = chan->if_send_no_bfrs; *(unsigned long *) &data[114] = chan->if_send_adptr_bfrs_full; *(unsigned long *) &data[118] = chan->if_send_bfrs_passed_to_adptr; *(unsigned long *) &data[120] = card->irq_dis_if_send_count; mbox->cmd.length = 62; break; case 0x46: *(unsigned long *) &data[62] = card->statistics.isr_entry; *(unsigned long *) &data[66] = card->statistics.isr_already_critical; *(unsigned long *) &data[70] = card->statistics.isr_rx; *(unsigned long *) &data[74] = card->statistics.isr_tx; *(unsigned long *) &data[78] = card->statistics.isr_intr_test; *(unsigned long *) &data[82] = card->statistics.isr_spurious; *(unsigned long *) &data[86] = card->statistics.isr_enable_tx_int; *(unsigned long *) &data[90] = card->statistics.tx_intr_dev_not_started; *(unsigned long *) &data[94] = card->statistics.rx_intr_corrupt_rx_bfr; *(unsigned long *) &data[98] = card->statistics.rx_intr_on_orphaned_DLCI; *(unsigned long *) &data[102] = chan->rx_intr_no_socket; *(unsigned long *) &data[106] = chan->rx_intr_dev_not_started; *(unsigned long *) &data[110] = chan->rx_intr_DRVSTATS_request; *(unsigned long *) &data[114] = chan->rx_intr_FPIPE_request; *(unsigned long *) &data[118] = chan->rx_intr_bfr_not_passed_to_stack; *(unsigned long *) &data[122] = chan->rx_intr_bfr_passed_to_stack; mbox->cmd.length = 64; break; case 0x47: *(unsigned long *) &data[62] = chan->UDP_FPIPE_mgmt_kmalloc_err; *(unsigned long *) &data[66] = chan->UDP_FPIPE_mgmt_adptr_type_err; *(unsigned long *) &data[70] = chan->UDP_FPIPE_mgmt_direction_err; *(unsigned long *) &data[74] = chan->UDP_FPIPE_mgmt_adptr_cmnd_timeout; *(unsigned long *) &data[78] = chan->UDP_FPIPE_mgmt_adptr_cmnd_OK; *(unsigned long *) &data[82] = chan->UDP_FPIPE_mgmt_adptr_send_passed; *(unsigned long *) &data[86] = chan->UDP_FPIPE_mgmt_adptr_send_failed; *(unsigned long *) &data[90] = chan->UDP_FPIPE_mgmt_no_socket; *(unsigned long *) &data[94] = chan->UDP_FPIPE_mgmt_not_passed_to_stack; *(unsigned long *) &data[98] = chan->UDP_FPIPE_mgmt_passed_to_stack; *(unsigned long *) &data[102] = chan->UDP_DRVSTATS_mgmt_kmalloc_err; *(unsigned long *) &data[106] = chan->UDP_DRVSTATS_mgmt_adptr_cmnd_timeout; *(unsigned long *) &data[110] = chan->UDP_DRVSTATS_mgmt_adptr_cmnd_OK; *(unsigned long *) &data[114] = chan->UDP_DRVSTATS_mgmt_adptr_send_passed; *(unsigned long *) &data[118] = chan->UDP_DRVSTATS_mgmt_adptr_send_failed; *(unsigned long *) &data[122] = chan->UDP_DRVSTATS_mgmt_no_socket; *(unsigned long *) &data[126] = chan->UDP_DRVSTATS_mgmt_not_passed_to_stack; *(unsigned long *) &data[130] = chan->UDP_DRVSTATS_mgmt_passed_to_stack; *(unsigned long *) &data[134] = card->statistics.poll_entry; *(unsigned long *) &data[138] = card->statistics.poll_already_critical; *(unsigned long *) &data[142] = card->statistics.poll_processed; *(unsigned long *) &data[144] = card->irq_dis_poll_count; mbox->cmd.length = 86; break; default: do { memcpy(&mbox->cmd, &sendpacket[47], sizeof(fr_cmd_t)); if (mbox->cmd.length) memcpy(&mbox->data, &sendpacket[62], mbox->cmd.length); err = sdla_exec(mbox) ? mbox->cmd.result : CMD_TIMEOUT; } while (err && c_retry-- && fr_event(card, err, mbox)); if (!err) { ++chan->UDP_DRVSTATS_mgmt_adptr_cmnd_OK; memcpy(data, sendpacket, skb->len); memcpy(&data[47], &mbox->cmd, sizeof(fr_cmd_t)); if (mbox->cmd.length) memcpy(&data[62], &mbox->data, mbox->cmd.length); } else { ++chan->UDP_DRVSTATS_mgmt_adptr_cmnd_timeout; } } /* Fill UDP TTL */ data[10] = card->wandev.ttl; len = reply_udp(data, mbox->cmd.length); if (udp_pkt_src == UDP_PKT_FRM_NETWORK) { err = fr508_send(card, dlci, 0, len, data); if (err) ++chan->UDP_DRVSTATS_mgmt_adptr_send_failed; else ++chan->UDP_DRVSTATS_mgmt_adptr_send_passed; dev_kfree_skb(skb); } 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, data, len); /* Decapsulate packet and pass it up the protocol stack */ new_skb->dev = dev; /* remove hardware header */ buf = skb_pull(new_skb, 1); if (!wanrouter_type_trans(new_skb, dev)) { /* can't decapsulate packet */ ++chan->UDP_DRVSTATS_mgmt_not_passed_to_stack; dev_kfree_skb(new_skb); } else { ++chan->UDP_DRVSTATS_mgmt_passed_to_stack; netif_rx(new_skb); } } else { ++chan->UDP_DRVSTATS_mgmt_no_socket; printk(KERN_INFO "%s: UDP mgmt cmnd, no socket buffers available!\n", card->devname); } } kfree(data); return 0; } /*============================================================================== * Determine what type of UDP call it is. DRVSTATS or FPIPE8ND ? */ static int udp_pkt_type(struct sk_buff *skb, sdla_t * card) { unsigned char *sendpacket; unsigned char buf2[5]; sendpacket = skb->data; memcpy(&buf2, &card->wandev.udp_port, 2); if (sendpacket[2] == 0x45 && /* IP packet */ sendpacket[11] == 0x11 && /* UDP packet */ sendpacket[24] == buf2[1] && /* UDP Port */ sendpacket[25] == buf2[0] && sendpacket[38] == 0x01) { if (sendpacket[30] == 0x46 && /* FPIPE8ND: Signature */ sendpacket[31] == 0x50 && sendpacket[32] == 0x49 && sendpacket[33] == 0x50 && sendpacket[34] == 0x45 && sendpacket[35] == 0x38 && sendpacket[36] == 0x4E && sendpacket[37] == 0x44) { return UDP_FPIPE_TYPE; } else if (sendpacket[30] == 0x44 && /* DRVSTATS: Signature */ sendpacket[31] == 0x52 && sendpacket[32] == 0x56 && sendpacket[33] == 0x53 && sendpacket[34] == 0x54 && sendpacket[35] == 0x41 && sendpacket[36] == 0x54 && sendpacket[37] == 0x53) { return UDP_DRVSTATS_TYPE; } else return UDP_INVALID_TYPE; } else return UDP_INVALID_TYPE; } /*============================================================================== * Initializes the Statistics values in the fr_channel structure. */ void init_chan_statistics(fr_channel_t * chan) { chan->if_send_entry = 0; chan->if_send_skb_null = 0; chan->if_send_broadcast = 0; chan->if_send_multicast = 0; chan->if_send_critical_ISR = 0; chan->if_send_critical_non_ISR = 0; chan->if_send_busy = 0; chan->if_send_busy_timeout = 0; chan->if_send_FPIPE_request = 0; chan->if_send_DRVSTATS_request = 0; chan->if_send_wan_disconnected = 0; chan->if_send_dlci_disconnected = 0; chan->if_send_no_bfrs = 0; chan->if_send_adptr_bfrs_full = 0; chan->if_send_bfrs_passed_to_adptr = 0; chan->rx_intr_no_socket = 0; chan->rx_intr_dev_not_started = 0; chan->rx_intr_FPIPE_request = 0; chan->rx_intr_DRVSTATS_request = 0; chan->rx_intr_bfr_not_passed_to_stack = 0; chan->rx_intr_bfr_passed_to_stack = 0; chan->UDP_FPIPE_mgmt_kmalloc_err = 0; chan->UDP_FPIPE_mgmt_direction_err = 0; chan->UDP_FPIPE_mgmt_adptr_type_err = 0; chan->UDP_FPIPE_mgmt_adptr_cmnd_OK = 0; chan->UDP_FPIPE_mgmt_adptr_cmnd_timeout = 0; chan->UDP_FPIPE_mgmt_adptr_send_passed = 0; chan->UDP_FPIPE_mgmt_adptr_send_failed = 0; chan->UDP_FPIPE_mgmt_not_passed_to_stack = 0; chan->UDP_FPIPE_mgmt_passed_to_stack = 0; chan->UDP_FPIPE_mgmt_no_socket = 0; chan->UDP_DRVSTATS_mgmt_kmalloc_err = 0; chan->UDP_DRVSTATS_mgmt_adptr_cmnd_OK = 0; chan->UDP_DRVSTATS_mgmt_adptr_cmnd_timeout = 0; chan->UDP_DRVSTATS_mgmt_adptr_send_passed = 0; chan->UDP_DRVSTATS_mgmt_adptr_send_failed = 0; chan->UDP_DRVSTATS_mgmt_not_passed_to_stack = 0; chan->UDP_DRVSTATS_mgmt_passed_to_stack = 0; chan->UDP_DRVSTATS_mgmt_no_socket = 0; } /*============================================================================== * Initializes the Statistics values in the Sdla_t structure. */ void init_global_statistics(sdla_t * card) { /* Intialize global statistics for a card */ card->statistics.isr_entry = 0; card->statistics.isr_already_critical = 0; card->statistics.isr_rx = 0; card->statistics.isr_tx = 0; card->statistics.isr_intr_test = 0; card->statistics.isr_spurious = 0; card->statistics.isr_enable_tx_int = 0; card->statistics.rx_intr_corrupt_rx_bfr = 0; card->statistics.rx_intr_on_orphaned_DLCI = 0; card->statistics.tx_intr_dev_not_started = 0; card->statistics.poll_entry = 0; card->statistics.poll_already_critical = 0; card->statistics.poll_processed = 0; } 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 { memset(&mbox->cmd, 0, sizeof(fr_cmd_t)); mbox->cmd.command = FR_READ_DLCI_IB_MAPPING; 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) { printk(KERN_INFO "%s: DLCI= %d, IB addr = %lx for %s\n" ,card->devname, result->dlci, result->addr_value ,chan->name); chan->IB_addr = result->addr_value; 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); } /****** End *****************************************************************/