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* sdla_fr.c WANPIPE(tm) Multiprotocol WAN Link Driver. Frame relay module.
*
* Author(s): Gene Kozin
* Jaspreet Singh <jaspreet@sangoma.com>
*
* 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 <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/malloc.h> /* kmalloc(), kfree() */
#include <linux/wanrouter.h> /* WAN router definitions */
#include <linux/wanpipe.h> /* WANPIPE common user API definitions */
#include <linux/if_arp.h> /* ARPHRD_* defines */
#include <asm/byteorder.h> /* htons(), etc. */
#include <asm/io.h> /* for inb(), outb(), etc. */
#include <linux/time.h> /* for do_gettimeofday */
#define _GNUC_
#include <linux/sdla_fr.h> /* frame relay firmware API definitions */
#include <asm/uaccess.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
/* 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 *****************************************************************/
|