a8178345c4
From: Marcelo Feitoza Parisi <marcelo@feitoza.com.br> Use of the time_after() macro, defined at linux/jiffies.h, which deal with wrapping correctly and are nicer to read. Signed-off-by: Marcelo Feitoza Parisi <marcelo@feitoza.com.br> Signed-off-by: Domen Puncer <domen@coderock.org> Signed-off-by: David S. Miller <davem@davemloft.net>
5070 lines
137 KiB
C
5070 lines
137 KiB
C
/*****************************************************************************
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* sdla_fr.c WANPIPE(tm) Multiprotocol WAN Link Driver. Frame relay module.
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*
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* Author(s): Nenad Corbic <ncorbic@sangoma.com>
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* Gideon Hack
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*
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* Copyright: (c) 1995-2001 Sangoma Technologies Inc.
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*
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* This program is free software; you can redistribute it and/or
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* modify it under the terms of the GNU General Public License
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* as published by the Free Software Foundation; either version
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* 2 of the License, or (at your option) any later version.
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* ============================================================================
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* Nov 23, 2000 Nenad Corbic o Added support for 2.4.X kernels
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* Nov 15, 2000 David Rokavarg
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* Nenad Corbic o Added frame relay bridging support.
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* Original code from Mark Wells and Kristian Hoffmann has
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* been integrated into the frame relay driver.
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* Nov 13, 2000 Nenad Corbic o Added true interface type encoding option.
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* Tcpdump doesn't support Frame Relay inteface
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* types, to fix this true type option will set
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* the interface type to RAW IP mode.
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* Nov 07, 2000 Nenad Corbic o Added security features for UDP debugging:
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* Deny all and specify allowed requests.
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* Nov 06, 2000 Nenad Corbic o Wanpipe interfaces conform to raw packet interfaces.
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* Moved the if_header into the if_send() routine.
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* The if_header() was breaking the libpcap
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* support. i.e. support for tcpdump, ethereal ...
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* Oct 12. 2000 Nenad Corbic o Added error message in fr_configure
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* Jul 31, 2000 Nenad Corbic o Fixed the Router UP Time.
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* Apr 28, 2000 Nenad Corbic o Added the option to shutdown an interface
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* when the channel gets disconnected.
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* Apr 28, 2000 Nenad Corbic o Added M.Grants patch: disallow duplicate
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* interface setups.
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* Apr 25, 2000 Nenad Corbic o Added M.Grants patch: dynamically add/remove
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* new dlcis/interfaces.
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* Mar 23, 2000 Nenad Corbic o Improved task queue, bh handling.
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* Mar 16, 2000 Nenad Corbic o Added Inverse ARP support
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* Mar 13, 2000 Nenad Corbic o Added new socket API support.
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* Mar 06, 2000 Nenad Corbic o Bug Fix: corrupted mbox recovery.
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* Feb 24, 2000 Nenad Corbic o Fixed up FT1 UDP debugging problem.
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* Dev 15, 1999 Nenad Corbic o Fixed up header files for 2.0.X kernels
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*
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* Nov 08, 1999 Nenad Corbic o Combined all debug UDP calls into one function
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* o Removed the ARP support. This has to be done
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* in the next version.
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* o Only a Node can implement NO signalling.
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* Initialize DLCI during if_open() if NO
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* signalling.
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* o Took out IPX support, implement in next
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* version
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* Sep 29, 1999 Nenad Corbic o Added SMP support and changed the update
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* function to use timer interrupt.
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* o Fixed the CIR bug: Set the value of BC
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* to CIR when the CIR is enabled.
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* o Updated comments, statistics and tracing.
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* Jun 02, 1999 Gideon Hack o Updated for S514 support.
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* Sep 18, 1998 Jaspreet Singh o Updated for 2.2.X kernels.
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* Jul 31, 1998 Jaspreet Singh o Removed wpf_poll routine. The channel/DLCI
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* status is received through an event interrupt.
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* Jul 08, 1998 David Fong o Added inverse ARP support.
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* Mar 26, 1997 Jaspreet Singh o Returning return codes for failed UDP cmds.
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* Jan 28, 1997 Jaspreet Singh o Improved handling of inactive DLCIs.
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* Dec 30, 1997 Jaspreet Singh o Replaced dev_tint() with mark_bh(NET_BH)
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* Dec 16, 1997 Jaspreet Singh o Implemented Multiple IPX support.
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* Nov 26, 1997 Jaspreet Singh o Improved load sharing with multiple boards
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* o Added Cli() to protect enabling of interrupts
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* while polling is called.
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* Nov 24, 1997 Jaspreet Singh o Added counters to avoid enabling of interrupts
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* when they have been disabled by another
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* interface or routine (eg. wpf_poll).
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* Nov 06, 1997 Jaspreet Singh o Added INTR_TEST_MODE to avoid polling
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* routine disable interrupts during interrupt
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* testing.
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* Oct 20, 1997 Jaspreet Singh o Added hooks in for Router UP time.
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* Oct 16, 1997 Jaspreet Singh o The critical flag is used to maintain flow
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* control by avoiding RACE conditions. The
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* cli() and restore_flags() are taken out.
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* The fr_channel structure is appended for
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* Driver Statistics.
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* Oct 15, 1997 Farhan Thawar o updated if_send() and receive for IPX
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* Aug 29, 1997 Farhan Thawar o Removed most of the cli() and sti()
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* o Abstracted the UDP management stuff
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* o Now use tbusy and critical more intelligently
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* Jul 21, 1997 Jaspreet Singh o Can configure T391, T392, N391, N392 & N393
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* through router.conf.
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* o Protected calls to sdla_peek() by adDing
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* save_flags(), cli() and restore_flags().
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* o Added error message for Inactive DLCIs in
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* fr_event() and update_chan_state().
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* o Fixed freeing up of buffers using kfree()
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* when packets are received.
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* Jul 07, 1997 Jaspreet Singh o Added configurable TTL for UDP packets
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* o Added ability to discard multicast and
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* broadcast source addressed packets
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* Jun 27, 1997 Jaspreet Singh o Added FT1 monitor capabilities
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* New case (0x44) statement in if_send routine
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* Added a global variable rCount to keep track
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* of FT1 status enabled on the board.
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* May 29, 1997 Jaspreet Singh o Fixed major Flow Control Problem
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* With multiple boards a problem was seen where
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* the second board always stopped transmitting
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* packet after running for a while. The code
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* got into a stage where the interrupts were
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* disabled and dev->tbusy was set to 1.
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* This caused the If_send() routine to get into
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* the if clause for it(0,dev->tbusy)
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* forever.
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* The code got into this stage due to an
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* interrupt occurring within the if clause for
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* set_bit(0,dev->tbusy). Since an interrupt
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* disables furhter transmit interrupt and
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* makes dev->tbusy = 0, this effect was undone
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* by making dev->tbusy = 1 in the if clause.
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* The Fix checks to see if Transmit interrupts
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* are disabled then do not make dev->tbusy = 1
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* Introduced a global variable: int_occur and
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* added tx_int_enabled in the wan_device
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* structure.
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* May 21, 1997 Jaspreet Singh o Fixed UDP Management for multiple
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* boards.
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*
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* Apr 25, 1997 Farhan Thawar o added UDP Management stuff
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* o fixed bug in if_send() and tx_intr() to
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* sleep and wakeup all devices
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* Mar 11, 1997 Farhan Thawar Version 3.1.1
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* o fixed (+1) bug in fr508_rx_intr()
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* o changed if_send() to return 0 if
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* wandev.critical() is true
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* o free socket buffer in if_send() if
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* returning 0
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* o added tx_intr() routine
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* Jan 30, 1997 Gene Kozin Version 3.1.0
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* o implemented exec() entry point
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* o fixed a bug causing driver configured as
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* a FR switch to be stuck in WAN_
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* mode
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* Jan 02, 1997 Gene Kozin Initial version.
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*****************************************************************************/
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#include <linux/module.h>
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#include <linux/kernel.h> /* printk(), and other useful stuff */
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#include <linux/stddef.h> /* offsetof(), etc. */
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#include <linux/errno.h> /* return codes */
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#include <linux/string.h> /* inline memset(), etc. */
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#include <linux/slab.h> /* kmalloc(), kfree() */
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#include <linux/wanrouter.h> /* WAN router definitions */
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#include <linux/wanpipe.h> /* WANPIPE common user API definitions */
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#include <linux/workqueue.h>
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#include <linux/if_arp.h> /* ARPHRD_* defines */
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#include <asm/byteorder.h> /* htons(), etc. */
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#include <asm/io.h> /* for inb(), outb(), etc. */
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#include <linux/time.h> /* for do_gettimeofday */
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#include <linux/in.h> /* sockaddr_in */
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#include <linux/jiffies.h> /* time_after() macro */
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#include <asm/errno.h>
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#include <linux/ip.h>
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#include <linux/if.h>
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#include <linux/if_wanpipe_common.h> /* Wanpipe Socket */
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#include <linux/if_wanpipe.h>
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#include <linux/sdla_fr.h> /* frame relay firmware API definitions */
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#include <asm/uaccess.h>
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#include <linux/inetdevice.h>
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#include <linux/netdevice.h>
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#include <net/route.h> /* Dynamic Route Creation */
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#include <linux/etherdevice.h> /* eth_type_trans() used for bridging */
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#include <linux/random.h>
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/****** Defines & Macros ****************************************************/
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#define MAX_CMD_RETRY 10 /* max number of firmware retries */
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#define FR_HEADER_LEN 8 /* max encapsulation header size */
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#define FR_CHANNEL_MTU 1500 /* unfragmented logical channel MTU */
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/* Q.922 frame types */
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#define Q922_UI 0x03 /* Unnumbered Info frame */
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#define Q922_XID 0xAF
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/* DLCI configured or not */
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#define DLCI_NOT_CONFIGURED 0x00
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#define DLCI_CONFIG_PENDING 0x01
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#define DLCI_CONFIGURED 0x02
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/* CIR enabled or not */
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#define CIR_ENABLED 0x00
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#define CIR_DISABLED 0x01
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#define FRAME_RELAY_API 1
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#define MAX_BH_BUFF 10
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/* For handle_IPXWAN() */
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#define CVHexToAscii(b) (((unsigned char)(b) > (unsigned char)9) ? ((unsigned char)'A' + ((unsigned char)(b) - (unsigned char)10)) : ((unsigned char)'0' + (unsigned char)(b)))
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/****** Data Structures *****************************************************/
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/* This is an extention of the 'struct device' we create for each network
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* interface to keep the rest of channel-specific data.
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*/
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typedef struct fr_channel
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{
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wanpipe_common_t common;
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char name[WAN_IFNAME_SZ+1]; /* interface name, ASCIIZ */
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unsigned dlci_configured ; /* check whether configured or not */
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unsigned cir_status; /* check whether CIR enabled or not */
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unsigned dlci; /* logical channel number */
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unsigned cir; /* committed information rate */
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unsigned bc; /* committed burst size */
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unsigned be; /* excess burst size */
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unsigned mc; /* multicast support on or off */
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unsigned tx_int_status; /* Transmit Interrupt Status */
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unsigned short pkt_length; /* Packet Length */
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unsigned long router_start_time;/* Router start time in seconds */
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unsigned long tick_counter; /* counter for transmit time out */
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char dev_pending_devtint; /* interface pending dev_tint() */
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void *dlci_int_interface; /* pointer to the DLCI Interface */
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unsigned long IB_addr; /* physical address of Interface Byte */
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unsigned long state_tick; /* time of the last state change */
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unsigned char enable_IPX; /* Enable/Disable the use of IPX */
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unsigned long network_number; /* Internal Network Number for IPX*/
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sdla_t *card; /* -> owner */
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unsigned route_flag; /* Add/Rem dest addr in route tables */
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unsigned inarp; /* Inverse Arp Request status */
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long inarp_ready; /* Ready to send requests */
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int inarp_interval; /* Time between InArp Requests */
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unsigned long inarp_tick; /* InArp jiffies tick counter */
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long interface_down; /* Bring interface down on disconnect */
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struct net_device_stats ifstats; /* interface statistics */
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if_send_stat_t drvstats_if_send;
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rx_intr_stat_t drvstats_rx_intr;
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pipe_mgmt_stat_t drvstats_gen;
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unsigned long router_up_time;
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unsigned short transmit_length;
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struct sk_buff *delay_skb;
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bh_data_t *bh_head; /* Circular buffer for chdlc_bh */
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unsigned long tq_working;
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volatile int bh_write;
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volatile int bh_read;
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atomic_t bh_buff_used;
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/* Polling task queue. Each interface
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* has its own task queue, which is used
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* to defer events from the interrupt */
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struct work_struct fr_poll_work;
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struct timer_list fr_arp_timer;
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u32 ip_local;
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u32 ip_remote;
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long config_dlci;
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long unconfig_dlci;
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/* Whether this interface should be setup as a gateway.
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* Used by dynamic route setup code */
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u8 gateway;
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/* True interface type */
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u8 true_if_encoding;
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u8 fr_header[FR_HEADER_LEN];
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char fr_header_len;
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} fr_channel_t;
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/* Route Flag options */
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#define NO_ROUTE 0x00
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#define ADD_ROUTE 0x01
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#define ROUTE_ADDED 0x02
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#define REMOVE_ROUTE 0x03
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#define ARP_REQ 0x04
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/* inarp options */
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#define INARP_NONE 0x00
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#define INARP_REQUEST 0x01
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#define INARP_CONFIGURED 0x02
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/* reasons for enabling the timer interrupt on the adapter */
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#define TMR_INT_ENABLED_UDP 0x01
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#define TMR_INT_ENABLED_UPDATE 0x02
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#define TMR_INT_ENABLED_ARP 0x04
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#define TMR_INT_ENABLED_UPDATE_STATE 0x08
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#define TMR_INT_ENABLED_CONFIG 0x10
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#define TMR_INT_ENABLED_UNCONFIG 0x20
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typedef struct dlci_status
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{
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unsigned short dlci PACKED;
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unsigned char state PACKED;
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} dlci_status_t;
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typedef struct dlci_IB_mapping
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{
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unsigned short dlci PACKED;
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unsigned long addr_value PACKED;
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} dlci_IB_mapping_t;
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/* This structure is used for DLCI list Tx interrupt mode. It is used to
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enable interrupt bit and set the packet length for transmission
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*/
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typedef struct fr_dlci_interface
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{
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unsigned char gen_interrupt PACKED;
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unsigned short packet_length PACKED;
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unsigned char reserved PACKED;
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} fr_dlci_interface_t;
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/* variable for keeping track of enabling/disabling FT1 monitor status */
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static int rCount = 0;
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extern void disable_irq(unsigned int);
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extern void enable_irq(unsigned int);
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/* variable for keeping track of number of interrupts generated during
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* interrupt test routine
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*/
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static int Intr_test_counter;
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/****** Function Prototypes *************************************************/
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/* WAN link driver entry points. These are called by the WAN router module. */
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static int update(struct wan_device *wandev);
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static int new_if(struct wan_device *wandev, struct net_device *dev,
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wanif_conf_t *conf);
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static int del_if(struct wan_device *wandev, struct net_device *dev);
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static void disable_comm (sdla_t *card);
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/* WANPIPE-specific entry points */
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static int wpf_exec(struct sdla *card, void *u_cmd, void *u_data);
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/* Network device interface */
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static int if_init(struct net_device *dev);
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static int if_open(struct net_device *dev);
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static int if_close(struct net_device *dev);
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static void if_tx_timeout(struct net_device *dev);
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static int if_rebuild_hdr (struct sk_buff *skb);
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static int if_send(struct sk_buff *skb, struct net_device *dev);
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static int chk_bcast_mcast_addr(sdla_t *card, struct net_device* dev,
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struct sk_buff *skb);
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static struct net_device_stats *if_stats(struct net_device *dev);
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/* Interrupt handlers */
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static void fr_isr(sdla_t *card);
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static void rx_intr(sdla_t *card);
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static void tx_intr(sdla_t *card);
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static void timer_intr(sdla_t *card);
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static void spur_intr(sdla_t *card);
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/* Frame relay firmware interface functions */
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static int fr_read_version(sdla_t *card, char *str);
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static int fr_configure(sdla_t *card, fr_conf_t *conf);
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static int fr_dlci_configure(sdla_t *card, fr_dlc_conf_t *conf, unsigned dlci);
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static int fr_init_dlci (sdla_t *card, fr_channel_t *chan);
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static int fr_set_intr_mode (sdla_t *card, unsigned mode, unsigned mtu, unsigned short timeout);
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static int fr_comm_enable(sdla_t *card);
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static void fr_comm_disable(sdla_t *card);
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static int fr_get_err_stats(sdla_t *card);
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static int fr_get_stats(sdla_t *card);
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static int fr_add_dlci(sdla_t *card, int dlci);
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static int fr_activate_dlci(sdla_t *card, int dlci);
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static int fr_delete_dlci (sdla_t* card, int dlci);
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static int fr_issue_isf(sdla_t *card, int isf);
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static int fr_send(sdla_t *card, int dlci, unsigned char attr, int len,
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void *buf);
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static int fr_send_data_header(sdla_t *card, int dlci, unsigned char attr, int len,
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void *buf,unsigned char hdr_len);
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static unsigned int fr_send_hdr(sdla_t *card, int dlci, unsigned int offset);
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static int check_dlci_config (sdla_t *card, fr_channel_t *chan);
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static void initialize_rx_tx_buffers (sdla_t *card);
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/* Firmware asynchronous event handlers */
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static int fr_event(sdla_t *card, int event, fr_mbox_t *mbox);
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static int fr_modem_failure(sdla_t *card, fr_mbox_t *mbox);
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static int fr_dlci_change(sdla_t *card, fr_mbox_t *mbox);
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/* Miscellaneous functions */
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static int update_chan_state(struct net_device *dev);
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static void set_chan_state(struct net_device *dev, int state);
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static struct net_device *find_channel(sdla_t *card, unsigned dlci);
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static int is_tx_ready(sdla_t *card, fr_channel_t *chan);
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static unsigned int dec_to_uint(unsigned char *str, int len);
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static int reply_udp( unsigned char *data, unsigned int mbox_len );
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static int intr_test( sdla_t* card );
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static void init_chan_statistics( fr_channel_t* chan );
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static void init_global_statistics( sdla_t* card );
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static void read_DLCI_IB_mapping( sdla_t* card, fr_channel_t* chan );
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static int setup_for_delayed_transmit(struct net_device* dev,
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struct sk_buff *skb);
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struct net_device *move_dev_to_next(sdla_t *card, struct net_device *dev);
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static int check_tx_status(sdla_t *card, struct net_device *dev);
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/* Frame Relay Socket API */
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static void trigger_fr_bh (fr_channel_t *);
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static void fr_bh(struct net_device *dev);
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static int fr_bh_cleanup(struct net_device *dev);
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static int bh_enqueue(struct net_device *dev, struct sk_buff *skb);
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static void trigger_fr_poll(struct net_device *dev);
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static void fr_poll(struct net_device *dev);
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//static void add_gateway(struct net_device *dev);
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static void trigger_unconfig_fr(struct net_device *dev);
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static void unconfig_fr (sdla_t *);
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static void trigger_config_fr (sdla_t *);
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static void config_fr (sdla_t *);
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/* Inverse ARP and Dynamic routing functions */
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int process_ARP(arphdr_1490_t *ArpPacket, sdla_t *card, struct net_device *dev);
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int is_arp(void *buf);
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int send_inarp_request(sdla_t *card, struct net_device *dev);
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|
|
static void trigger_fr_arp(struct net_device *dev);
|
|
static void fr_arp (unsigned long data);
|
|
|
|
|
|
/* Udp management functions */
|
|
static int process_udp_mgmt_pkt(sdla_t *card);
|
|
static int udp_pkt_type( struct sk_buff *skb, sdla_t *card );
|
|
static int store_udp_mgmt_pkt(int udp_type, char udp_pkt_src, sdla_t* card,
|
|
struct sk_buff *skb, int dlci);
|
|
|
|
/* IPX functions */
|
|
static void switch_net_numbers(unsigned char *sendpacket,
|
|
unsigned long network_number, unsigned char incoming);
|
|
|
|
static int handle_IPXWAN(unsigned char *sendpacket, char *devname,
|
|
unsigned char enable_IPX, unsigned long network_number);
|
|
|
|
/* Lock Functions: SMP supported */
|
|
void s508_s514_unlock(sdla_t *card, unsigned long *smp_flags);
|
|
void s508_s514_lock(sdla_t *card, unsigned long *smp_flags);
|
|
|
|
unsigned short calc_checksum (char *, int);
|
|
static int setup_fr_header(struct sk_buff** skb,
|
|
struct net_device* dev, char op_mode);
|
|
|
|
|
|
/****** Public Functions ****************************************************/
|
|
|
|
/*============================================================================
|
|
* Frame relay protocol initialization routine.
|
|
*
|
|
* This routine is called by the main WANPIPE module during setup. At this
|
|
* point adapter is completely initialized and firmware is running.
|
|
* o read firmware version (to make sure it's alive)
|
|
* o configure adapter
|
|
* o initialize protocol-specific fields of the adapter data space.
|
|
*
|
|
* Return: 0 o.k.
|
|
* < 0 failure.
|
|
*/
|
|
int wpf_init(sdla_t *card, wandev_conf_t *conf)
|
|
{
|
|
|
|
int err;
|
|
fr508_flags_t* flags;
|
|
|
|
union
|
|
{
|
|
char str[80];
|
|
fr_conf_t cfg;
|
|
} u;
|
|
|
|
fr_buf_info_t* buf_info;
|
|
int i;
|
|
|
|
|
|
printk(KERN_INFO "\n");
|
|
|
|
/* Verify configuration ID */
|
|
if (conf->config_id != WANCONFIG_FR) {
|
|
|
|
printk(KERN_INFO "%s: invalid configuration ID %u!\n",
|
|
card->devname, conf->config_id);
|
|
return -EINVAL;
|
|
|
|
}
|
|
|
|
/* Initialize protocol-specific fields of adapter data space */
|
|
switch (card->hw.fwid) {
|
|
|
|
case SFID_FR508:
|
|
card->mbox = (void*)(card->hw.dpmbase +
|
|
FR508_MBOX_OFFS);
|
|
card->flags = (void*)(card->hw.dpmbase +
|
|
FR508_FLAG_OFFS);
|
|
if(card->hw.type == SDLA_S514) {
|
|
card->mbox += FR_MB_VECTOR;
|
|
card->flags += FR_MB_VECTOR;
|
|
}
|
|
card->isr = &fr_isr;
|
|
break;
|
|
|
|
default:
|
|
return -EINVAL;
|
|
}
|
|
|
|
flags = card->flags;
|
|
|
|
/* Read firmware version. Note that when adapter initializes, it
|
|
* clears the mailbox, so it may appear that the first command was
|
|
* executed successfully when in fact it was merely erased. To work
|
|
* around this, we execute the first command twice.
|
|
*/
|
|
|
|
if (fr_read_version(card, NULL) || fr_read_version(card, u.str))
|
|
return -EIO;
|
|
|
|
printk(KERN_INFO "%s: running frame relay firmware v%s\n",
|
|
card->devname, u.str);
|
|
|
|
/* Adjust configuration */
|
|
conf->mtu += FR_HEADER_LEN;
|
|
conf->mtu = (conf->mtu >= MIN_LGTH_FR_DATA_CFG) ?
|
|
min_t(unsigned int, conf->mtu, FR_MAX_NO_DATA_BYTES_IN_FRAME) :
|
|
FR_CHANNEL_MTU + FR_HEADER_LEN;
|
|
|
|
conf->bps = min_t(unsigned int, conf->bps, 2048000);
|
|
|
|
/* Initialze the configuration structure sent to the board to zero */
|
|
memset(&u.cfg, 0, sizeof(u.cfg));
|
|
|
|
memset(card->u.f.dlci_to_dev_map, 0, sizeof(card->u.f.dlci_to_dev_map));
|
|
|
|
/* Configure adapter firmware */
|
|
|
|
u.cfg.mtu = conf->mtu;
|
|
u.cfg.kbps = conf->bps / 1000;
|
|
|
|
u.cfg.cir_fwd = u.cfg.cir_bwd = 16;
|
|
u.cfg.bc_fwd = u.cfg.bc_bwd = 16;
|
|
|
|
u.cfg.options = 0x0000;
|
|
printk(KERN_INFO "%s: Global CIR enabled by Default\n", card->devname);
|
|
|
|
switch (conf->u.fr.signalling) {
|
|
|
|
case WANOPT_FR_ANSI:
|
|
u.cfg.options = 0x0000;
|
|
break;
|
|
|
|
case WANOPT_FR_Q933:
|
|
u.cfg.options |= 0x0200;
|
|
break;
|
|
|
|
case WANOPT_FR_LMI:
|
|
u.cfg.options |= 0x0400;
|
|
break;
|
|
|
|
case WANOPT_NO:
|
|
u.cfg.options |= 0x0800;
|
|
break;
|
|
default:
|
|
printk(KERN_INFO "%s: Illegal Signalling option\n",
|
|
card->wandev.name);
|
|
return -EINVAL;
|
|
}
|
|
|
|
|
|
card->wandev.signalling = conf->u.fr.signalling;
|
|
|
|
if (conf->station == WANOPT_CPE) {
|
|
|
|
|
|
if (conf->u.fr.signalling == WANOPT_NO){
|
|
printk(KERN_INFO
|
|
"%s: ERROR - For NO signalling, station must be set to Node!",
|
|
card->devname);
|
|
return -EINVAL;
|
|
}
|
|
|
|
u.cfg.station = 0;
|
|
u.cfg.options |= 0x8000; /* auto config DLCI */
|
|
card->u.f.dlci_num = 0;
|
|
|
|
} else {
|
|
|
|
u.cfg.station = 1; /* switch emulation mode */
|
|
|
|
/* For switch emulation we have to create a list of dlci(s)
|
|
* that will be sent to be global SET_DLCI_CONFIGURATION
|
|
* command in fr_configure() routine.
|
|
*/
|
|
|
|
card->u.f.dlci_num = min_t(unsigned int, max_t(unsigned int, conf->u.fr.dlci_num, 1), 100);
|
|
|
|
for ( i = 0; i < card->u.f.dlci_num; i++) {
|
|
|
|
card->u.f.node_dlci[i] = (unsigned short)
|
|
conf->u.fr.dlci[i] ? conf->u.fr.dlci[i] : 16;
|
|
|
|
}
|
|
}
|
|
|
|
if (conf->clocking == WANOPT_INTERNAL)
|
|
u.cfg.port |= 0x0001;
|
|
|
|
if (conf->interface == WANOPT_RS232)
|
|
u.cfg.port |= 0x0002;
|
|
|
|
if (conf->u.fr.t391)
|
|
u.cfg.t391 = min_t(unsigned int, conf->u.fr.t391, 30);
|
|
else
|
|
u.cfg.t391 = 5;
|
|
|
|
if (conf->u.fr.t392)
|
|
u.cfg.t392 = min_t(unsigned int, conf->u.fr.t392, 30);
|
|
else
|
|
u.cfg.t392 = 15;
|
|
|
|
if (conf->u.fr.n391)
|
|
u.cfg.n391 = min_t(unsigned int, conf->u.fr.n391, 255);
|
|
else
|
|
u.cfg.n391 = 2;
|
|
|
|
if (conf->u.fr.n392)
|
|
u.cfg.n392 = min_t(unsigned int, conf->u.fr.n392, 10);
|
|
else
|
|
u.cfg.n392 = 3;
|
|
|
|
if (conf->u.fr.n393)
|
|
u.cfg.n393 = min_t(unsigned int, conf->u.fr.n393, 10);
|
|
else
|
|
u.cfg.n393 = 4;
|
|
|
|
if (fr_configure(card, &u.cfg))
|
|
return -EIO;
|
|
|
|
if (card->hw.type == SDLA_S514) {
|
|
|
|
buf_info = (void*)(card->hw.dpmbase + FR_MB_VECTOR +
|
|
FR508_RXBC_OFFS);
|
|
|
|
card->rxmb = (void*)(buf_info->rse_next + card->hw.dpmbase);
|
|
|
|
card->u.f.rxmb_base =
|
|
(void*)(buf_info->rse_base + card->hw.dpmbase);
|
|
|
|
card->u.f.rxmb_last =
|
|
(void*)(buf_info->rse_base +
|
|
(buf_info->rse_num - 1) * sizeof(fr_rx_buf_ctl_t) +
|
|
card->hw.dpmbase);
|
|
}else{
|
|
buf_info = (void*)(card->hw.dpmbase + FR508_RXBC_OFFS);
|
|
|
|
card->rxmb = (void*)(buf_info->rse_next -
|
|
FR_MB_VECTOR + card->hw.dpmbase);
|
|
|
|
card->u.f.rxmb_base =
|
|
(void*)(buf_info->rse_base -
|
|
FR_MB_VECTOR + card->hw.dpmbase);
|
|
|
|
card->u.f.rxmb_last =
|
|
(void*)(buf_info->rse_base +
|
|
(buf_info->rse_num - 1) * sizeof(fr_rx_buf_ctl_t) -
|
|
FR_MB_VECTOR + card->hw.dpmbase);
|
|
}
|
|
|
|
card->u.f.rx_base = buf_info->buf_base;
|
|
card->u.f.rx_top = buf_info->buf_top;
|
|
|
|
card->u.f.tx_interrupts_pending = 0;
|
|
|
|
card->wandev.mtu = conf->mtu;
|
|
card->wandev.bps = conf->bps;
|
|
card->wandev.interface = conf->interface;
|
|
card->wandev.clocking = conf->clocking;
|
|
card->wandev.station = conf->station;
|
|
card->poll = NULL;
|
|
card->exec = &wpf_exec;
|
|
card->wandev.update = &update;
|
|
card->wandev.new_if = &new_if;
|
|
card->wandev.del_if = &del_if;
|
|
card->wandev.state = WAN_DISCONNECTED;
|
|
card->wandev.ttl = conf->ttl;
|
|
card->wandev.udp_port = conf->udp_port;
|
|
card->disable_comm = &disable_comm;
|
|
card->u.f.arp_dev = NULL;
|
|
|
|
/* Intialize global statistics for a card */
|
|
init_global_statistics( card );
|
|
|
|
card->TracingEnabled = 0;
|
|
|
|
/* Interrupt Test */
|
|
Intr_test_counter = 0;
|
|
card->intr_mode = INTR_TEST_MODE;
|
|
err = intr_test( card );
|
|
|
|
printk(KERN_INFO "%s: End of Interrupt Test rc=0x%x count=%i\n",
|
|
card->devname,err,Intr_test_counter);
|
|
|
|
if (err || (Intr_test_counter < MAX_INTR_TEST_COUNTER)) {
|
|
printk(KERN_ERR "%s: Interrupt Test Failed, Counter: %i\n",
|
|
card->devname, Intr_test_counter);
|
|
printk(KERN_ERR "Please choose another interrupt\n");
|
|
err = -EIO;
|
|
return err;
|
|
}
|
|
|
|
printk(KERN_INFO "%s: Interrupt Test Passed, Counter: %i\n",
|
|
card->devname, Intr_test_counter);
|
|
|
|
|
|
/* Apr 28 2000. Nenad Corbic
|
|
* Enable commnunications here, not in if_open or new_if, since
|
|
* interfaces come down when the link is disconnected.
|
|
*/
|
|
|
|
/* If you enable comms and then set ints, you get a Tx int as you
|
|
* perform the SET_INT_TRIGGERS command. So, we only set int
|
|
* triggers and then adjust the interrupt mask (to disable Tx ints)
|
|
* before enabling comms.
|
|
*/
|
|
if (fr_set_intr_mode(card, (FR_INTR_RXRDY | FR_INTR_TXRDY |
|
|
FR_INTR_DLC | FR_INTR_TIMER | FR_INTR_TX_MULT_DLCIs) ,
|
|
card->wandev.mtu, 0)) {
|
|
return -EIO;
|
|
}
|
|
|
|
flags->imask &= ~(FR_INTR_TXRDY | FR_INTR_TIMER);
|
|
|
|
if (fr_comm_enable(card)) {
|
|
return -EIO;
|
|
}
|
|
wanpipe_set_state(card, WAN_CONNECTED);
|
|
spin_lock_init(&card->u.f.if_send_lock);
|
|
|
|
printk(KERN_INFO "\n");
|
|
|
|
return 0;
|
|
}
|
|
|
|
/******* WAN Device Driver Entry Points *************************************/
|
|
|
|
/*============================================================================
|
|
* Update device status & statistics.
|
|
*/
|
|
static int update(struct wan_device* wandev)
|
|
{
|
|
volatile sdla_t* card;
|
|
unsigned long timeout;
|
|
fr508_flags_t* flags;
|
|
|
|
/* sanity checks */
|
|
if ((wandev == NULL) || (wandev->private == NULL))
|
|
return -EFAULT;
|
|
|
|
if (wandev->state == WAN_UNCONFIGURED)
|
|
return -ENODEV;
|
|
|
|
card = wandev->private;
|
|
flags = card->flags;
|
|
|
|
|
|
card->u.f.update_comms_stats = 1;
|
|
card->u.f.timer_int_enabled |= TMR_INT_ENABLED_UPDATE;
|
|
flags->imask |= FR_INTR_TIMER;
|
|
timeout = jiffies;
|
|
for(;;) {
|
|
if(card->u.f.update_comms_stats == 0)
|
|
break;
|
|
if (time_after(jiffies, timeout + 1 * HZ)){
|
|
card->u.f.update_comms_stats = 0;
|
|
return -EAGAIN;
|
|
}
|
|
}
|
|
|
|
return 0;
|
|
}
|
|
|
|
/*============================================================================
|
|
* Create new logical channel.
|
|
* This routine is called by the router when ROUTER_IFNEW IOCTL is being
|
|
* handled.
|
|
* o parse media- and hardware-specific configuration
|
|
* o make sure that a new channel can be created
|
|
* o allocate resources, if necessary
|
|
* o prepare network device structure for registaration.
|
|
*
|
|
* Return: 0 o.k.
|
|
* < 0 failure (channel will not be created)
|
|
*/
|
|
static int new_if(struct wan_device* wandev, struct net_device* dev,
|
|
wanif_conf_t* conf)
|
|
{
|
|
sdla_t* card = wandev->private;
|
|
fr_channel_t* chan;
|
|
int dlci = 0;
|
|
int err = 0;
|
|
|
|
|
|
if ((conf->name[0] == '\0') || (strlen(conf->name) > WAN_IFNAME_SZ)) {
|
|
|
|
printk(KERN_INFO "%s: Invalid interface name!\n",
|
|
card->devname);
|
|
return -EINVAL;
|
|
}
|
|
|
|
/* allocate and initialize private data */
|
|
chan = kmalloc(sizeof(fr_channel_t), GFP_KERNEL);
|
|
|
|
if (chan == NULL)
|
|
return -ENOMEM;
|
|
|
|
memset(chan, 0, sizeof(fr_channel_t));
|
|
strcpy(chan->name, conf->name);
|
|
chan->card = card;
|
|
|
|
/* verify media address */
|
|
if (is_digit(conf->addr[0])) {
|
|
|
|
dlci = dec_to_uint(conf->addr, 0);
|
|
|
|
if (dlci && (dlci <= HIGHEST_VALID_DLCI)) {
|
|
|
|
chan->dlci = dlci;
|
|
|
|
} else {
|
|
|
|
printk(KERN_ERR
|
|
"%s: Invalid DLCI %u on interface %s!\n",
|
|
wandev->name, dlci, chan->name);
|
|
err = -EINVAL;
|
|
}
|
|
|
|
} else {
|
|
printk(KERN_ERR
|
|
"%s: Invalid media address on interface %s!\n",
|
|
wandev->name, chan->name);
|
|
err = -EINVAL;
|
|
}
|
|
|
|
if ((chan->true_if_encoding = conf->true_if_encoding) == WANOPT_YES){
|
|
printk(KERN_INFO
|
|
"%s: Enabling, true interface type encoding.\n",
|
|
card->devname);
|
|
}
|
|
|
|
|
|
|
|
/* Setup wanpipe as a router (WANPIPE) even if it is
|
|
* a bridged DLCI, or as an API
|
|
*/
|
|
if (strcmp(conf->usedby, "WANPIPE") == 0 ||
|
|
strcmp(conf->usedby, "BRIDGE") == 0 ||
|
|
strcmp(conf->usedby, "BRIDGE_N") == 0){
|
|
|
|
if(strcmp(conf->usedby, "WANPIPE") == 0){
|
|
chan->common.usedby = WANPIPE;
|
|
|
|
printk(KERN_INFO "%s: Running in WANPIPE mode.\n",
|
|
card->devname);
|
|
|
|
}else if(strcmp(conf->usedby, "BRIDGE") == 0){
|
|
|
|
chan->common.usedby = BRIDGE;
|
|
|
|
printk(KERN_INFO "%s: Running in WANPIPE (BRIDGE) mode.\n",
|
|
card->devname);
|
|
}else if( strcmp(conf->usedby, "BRIDGE_N") == 0 ){
|
|
|
|
chan->common.usedby = BRIDGE_NODE;
|
|
|
|
printk(KERN_INFO "%s: Running in WANPIPE (BRIDGE_NODE) mode.\n",
|
|
card->devname);
|
|
}
|
|
|
|
if (!err){
|
|
/* Dynamic interface configuration option.
|
|
* On disconnect, if the options is selected,
|
|
* the interface will be brought down */
|
|
if (conf->if_down == WANOPT_YES){
|
|
set_bit(DYN_OPT_ON,&chan->interface_down);
|
|
printk(KERN_INFO
|
|
"%s: Dynamic interface configuration enabled.\n",
|
|
card->devname);
|
|
}
|
|
}
|
|
|
|
} else if(strcmp(conf->usedby, "API") == 0){
|
|
|
|
chan->common.usedby = API;
|
|
printk(KERN_INFO "%s: Running in API mode.\n",
|
|
wandev->name);
|
|
}
|
|
|
|
if (err) {
|
|
|
|
kfree(chan);
|
|
return err;
|
|
}
|
|
|
|
/* place cir,be,bc and other channel specific information into the
|
|
* chan structure
|
|
*/
|
|
if (conf->cir) {
|
|
|
|
chan->cir = max_t(unsigned int, 1,
|
|
min_t(unsigned int, conf->cir, 512));
|
|
chan->cir_status = CIR_ENABLED;
|
|
|
|
|
|
/* If CIR is enabled, force BC to equal CIR
|
|
* this solves number of potential problems if CIR is
|
|
* set and BC is not
|
|
*/
|
|
chan->bc = chan->cir;
|
|
|
|
if (conf->be){
|
|
chan->be = max_t(unsigned int,
|
|
0, min_t(unsigned int, conf->be, 511));
|
|
}else{
|
|
conf->be = 0;
|
|
}
|
|
|
|
printk (KERN_INFO "%s: CIR enabled for DLCI %i \n",
|
|
wandev->name,chan->dlci);
|
|
printk (KERN_INFO "%s: CIR = %i ; BC = %i ; BE = %i\n",
|
|
wandev->name,chan->cir,chan->bc,chan->be);
|
|
|
|
|
|
}else{
|
|
chan->cir_status = CIR_DISABLED;
|
|
printk (KERN_INFO "%s: CIR disabled for DLCI %i\n",
|
|
wandev->name,chan->dlci);
|
|
}
|
|
|
|
chan->mc = conf->mc;
|
|
|
|
if (conf->inarp == WANOPT_YES){
|
|
printk(KERN_INFO "%s: Inverse ARP Support Enabled\n",card->devname);
|
|
chan->inarp = conf->inarp ? INARP_REQUEST : INARP_NONE;
|
|
chan->inarp_interval = conf->inarp_interval ? conf->inarp_interval : 10;
|
|
}else{
|
|
printk(KERN_INFO "%s: Inverse ARP Support Disabled\n",card->devname);
|
|
chan->inarp = INARP_NONE;
|
|
chan->inarp_interval = 10;
|
|
}
|
|
|
|
|
|
chan->dlci_configured = DLCI_NOT_CONFIGURED;
|
|
|
|
|
|
/*FIXME: IPX disabled in this WANPIPE version */
|
|
if (conf->enable_IPX == WANOPT_YES){
|
|
printk(KERN_INFO "%s: ERROR - This version of WANPIPE doesn't support IPX\n",
|
|
card->devname);
|
|
kfree(chan);
|
|
return -EINVAL;
|
|
}else{
|
|
chan->enable_IPX = WANOPT_NO;
|
|
}
|
|
|
|
if (conf->network_number){
|
|
chan->network_number = conf->network_number;
|
|
}else{
|
|
chan->network_number = 0xDEADBEEF;
|
|
}
|
|
|
|
chan->route_flag = NO_ROUTE;
|
|
|
|
init_chan_statistics(chan);
|
|
|
|
chan->transmit_length = 0;
|
|
|
|
/* prepare network device data space for registration */
|
|
strcpy(dev->name,chan->name);
|
|
|
|
dev->init = &if_init;
|
|
dev->priv = chan;
|
|
|
|
/* Initialize FR Polling Task Queue
|
|
* We need a poll routine for each network
|
|
* interface.
|
|
*/
|
|
INIT_WORK(&chan->fr_poll_work, (void *)fr_poll, dev);
|
|
|
|
init_timer(&chan->fr_arp_timer);
|
|
chan->fr_arp_timer.data=(unsigned long)dev;
|
|
chan->fr_arp_timer.function = fr_arp;
|
|
|
|
wandev->new_if_cnt++;
|
|
|
|
/* Tells us that if this interface is a
|
|
* gateway or not */
|
|
if ((chan->gateway = conf->gateway) == WANOPT_YES){
|
|
printk(KERN_INFO "%s: Interface %s is set as a gateway.\n",
|
|
card->devname,dev->name);
|
|
}
|
|
|
|
/* M. Grant Patch Apr 28 2000
|
|
* Disallow duplicate dlci configurations. */
|
|
if (card->u.f.dlci_to_dev_map[chan->dlci] != NULL) {
|
|
kfree(chan);
|
|
return -EBUSY;
|
|
}
|
|
|
|
/* Configure this dlci at a later date, when
|
|
* the interface comes up. i.e. when if_open()
|
|
* executes */
|
|
set_bit(0,&chan->config_dlci);
|
|
|
|
printk(KERN_INFO "\n");
|
|
|
|
return 0;
|
|
}
|
|
|
|
/*============================================================================
|
|
* Delete logical channel.
|
|
*/
|
|
static int del_if(struct wan_device* wandev, struct net_device* dev)
|
|
{
|
|
fr_channel_t* chan = dev->priv;
|
|
unsigned long smp_flags=0;
|
|
|
|
/* This interface is dead, make sure the
|
|
* ARP timer is stopped */
|
|
del_timer(&chan->fr_arp_timer);
|
|
|
|
/* If we are a NODE, we must unconfigure this DLCI
|
|
* Trigger an unconfigure command that will
|
|
* be executed in timer interrupt. We must wait
|
|
* for the command to complete. */
|
|
trigger_unconfig_fr(dev);
|
|
|
|
lock_adapter_irq(&wandev->lock, &smp_flags);
|
|
wandev->new_if_cnt--;
|
|
unlock_adapter_irq(&wandev->lock, &smp_flags);
|
|
|
|
return 0;
|
|
}
|
|
|
|
|
|
/*=====================================================================
|
|
* disable_comm
|
|
*
|
|
* Description:
|
|
* Disable communications.
|
|
* This code runs in shutdown (sdlamain.c)
|
|
* under critical flag. Therefore it is not
|
|
* necessary to set a critical flag here
|
|
*
|
|
* Usage:
|
|
* Commnunications are disabled only on a card
|
|
* shutdown.
|
|
*/
|
|
|
|
static void disable_comm (sdla_t *card)
|
|
{
|
|
printk(KERN_INFO "%s: Disabling Communications!\n",
|
|
card->devname);
|
|
fr_comm_disable(card);
|
|
}
|
|
|
|
/****** WANPIPE-specific entry points ***************************************/
|
|
|
|
/*============================================================================
|
|
* Execute adapter interface command.
|
|
*/
|
|
static int wpf_exec (struct sdla* card, void* u_cmd, void* u_data)
|
|
{
|
|
fr_mbox_t* mbox = card->mbox;
|
|
int retry = MAX_CMD_RETRY;
|
|
int err, len;
|
|
fr_cmd_t cmd;
|
|
|
|
if(copy_from_user((void*)&cmd, u_cmd, sizeof(cmd)))
|
|
return -EFAULT;
|
|
|
|
/* execute command */
|
|
do
|
|
{
|
|
memcpy(&mbox->cmd, &cmd, sizeof(cmd));
|
|
|
|
if (cmd.length){
|
|
if( copy_from_user((void*)&mbox->data, u_data, cmd.length))
|
|
return -EFAULT;
|
|
}
|
|
|
|
if (sdla_exec(mbox))
|
|
err = mbox->cmd.result;
|
|
|
|
else return -EIO;
|
|
|
|
} while (err && retry-- && fr_event(card, err, mbox));
|
|
|
|
/* return result */
|
|
if (copy_to_user(u_cmd, (void*)&mbox->cmd, sizeof(fr_cmd_t)))
|
|
return -EFAULT;
|
|
|
|
len = mbox->cmd.length;
|
|
|
|
if (len && u_data && !copy_to_user(u_data, (void*)&mbox->data, len))
|
|
return -EFAULT;
|
|
return 0;
|
|
}
|
|
|
|
/****** Network Device Interface ********************************************/
|
|
|
|
/*============================================================================
|
|
* Initialize Linux network interface.
|
|
*
|
|
* This routine is called only once for each interface, during Linux network
|
|
* interface registration. Returning anything but zero will fail interface
|
|
* registration.
|
|
*/
|
|
static int if_init(struct net_device* dev)
|
|
{
|
|
fr_channel_t* chan = dev->priv;
|
|
sdla_t* card = chan->card;
|
|
struct wan_device* wandev = &card->wandev;
|
|
|
|
/* Initialize device driver entry points */
|
|
dev->open = &if_open;
|
|
dev->stop = &if_close;
|
|
dev->hard_header = NULL;
|
|
dev->rebuild_header = &if_rebuild_hdr;
|
|
dev->hard_start_xmit = &if_send;
|
|
dev->get_stats = &if_stats;
|
|
dev->tx_timeout = &if_tx_timeout;
|
|
dev->watchdog_timeo = TX_TIMEOUT;
|
|
|
|
if (chan->common.usedby == WANPIPE || chan->common.usedby == API){
|
|
|
|
/* Initialize media-specific parameters */
|
|
if (chan->true_if_encoding){
|
|
dev->type = ARPHRD_DLCI; /* This breaks tcpdump */
|
|
}else{
|
|
dev->type = ARPHRD_PPP; /* ARP h/w type */
|
|
}
|
|
|
|
dev->flags |= IFF_POINTOPOINT;
|
|
dev->flags |= IFF_NOARP;
|
|
|
|
/* Enable Multicast addressing */
|
|
if (chan->mc == WANOPT_YES){
|
|
dev->flags |= IFF_MULTICAST;
|
|
}
|
|
|
|
dev->mtu = wandev->mtu - FR_HEADER_LEN;
|
|
/* For an API, the maximum number of bytes that the stack will pass
|
|
to the driver is (dev->mtu + dev->hard_header_len). So, adjust the
|
|
mtu so that a frame of maximum size can be transmitted by the API.
|
|
*/
|
|
if(chan->common.usedby == API) {
|
|
dev->mtu += (sizeof(api_tx_hdr_t) - FR_HEADER_LEN);
|
|
}
|
|
|
|
dev->hard_header_len = FR_HEADER_LEN;/* media header length */
|
|
dev->addr_len = 2; /* hardware address length */
|
|
*(unsigned short*)dev->dev_addr = htons(chan->dlci);
|
|
|
|
/* Set transmit buffer queue length */
|
|
dev->tx_queue_len = 100;
|
|
|
|
}else{
|
|
|
|
/* Setup the interface for Bridging */
|
|
int hw_addr=0;
|
|
ether_setup(dev);
|
|
|
|
/* Use a random number to generate the MAC address */
|
|
memcpy(dev->dev_addr, "\xFE\xFC\x00\x00\x00\x00", 6);
|
|
get_random_bytes(&hw_addr, sizeof(hw_addr));
|
|
*(int *)(dev->dev_addr + 2) += hw_addr;
|
|
}
|
|
|
|
/* Initialize hardware parameters (just for reference) */
|
|
dev->irq = wandev->irq;
|
|
dev->dma = wandev->dma;
|
|
dev->base_addr = wandev->ioport;
|
|
dev->mem_start = wandev->maddr;
|
|
dev->mem_end = wandev->maddr + wandev->msize - 1;
|
|
SET_MODULE_OWNER(dev);
|
|
|
|
return 0;
|
|
}
|
|
|
|
/*============================================================================
|
|
* Open network interface.
|
|
* o if this is the first open, then enable communications and interrupts.
|
|
* o prevent module from unloading by incrementing use count
|
|
*
|
|
* Return 0 if O.k. or errno.
|
|
*/
|
|
static int if_open(struct net_device* dev)
|
|
{
|
|
fr_channel_t* chan = dev->priv;
|
|
sdla_t* card = chan->card;
|
|
int err = 0;
|
|
struct timeval tv;
|
|
|
|
if (netif_running(dev))
|
|
return -EBUSY;
|
|
|
|
/* Initialize the task queue */
|
|
chan->tq_working=0;
|
|
|
|
INIT_WORK(&chan->common.wanpipe_work, (void *)fr_bh, dev);
|
|
|
|
/* Allocate and initialize BH circular buffer */
|
|
chan->bh_head = kmalloc((sizeof(bh_data_t)*MAX_BH_BUFF),GFP_ATOMIC);
|
|
memset(chan->bh_head,0,(sizeof(bh_data_t)*MAX_BH_BUFF));
|
|
atomic_set(&chan->bh_buff_used, 0);
|
|
|
|
netif_start_queue(dev);
|
|
|
|
wanpipe_open(card);
|
|
do_gettimeofday( &tv );
|
|
chan->router_start_time = tv.tv_sec;
|
|
|
|
if (test_bit(0,&chan->config_dlci)){
|
|
trigger_config_fr (card);
|
|
}else if (chan->inarp == INARP_REQUEST){
|
|
trigger_fr_arp(dev);
|
|
}
|
|
|
|
return err;
|
|
}
|
|
|
|
/*============================================================================
|
|
* Close network interface.
|
|
* o if this is the last open, then disable communications and interrupts.
|
|
* o reset flags.
|
|
*/
|
|
static int if_close(struct net_device* dev)
|
|
{
|
|
fr_channel_t* chan = dev->priv;
|
|
sdla_t* card = chan->card;
|
|
|
|
if (chan->inarp == INARP_CONFIGURED) {
|
|
chan->inarp = INARP_REQUEST;
|
|
}
|
|
|
|
netif_stop_queue(dev);
|
|
wanpipe_close(card);
|
|
|
|
return 0;
|
|
}
|
|
|
|
/*============================================================================
|
|
* Re-build media header.
|
|
*
|
|
* Return: 1 physical address resolved.
|
|
* 0 physical address not resolved
|
|
*/
|
|
static int if_rebuild_hdr (struct sk_buff* skb)
|
|
{
|
|
struct net_device *dev = skb->dev;
|
|
fr_channel_t* chan = dev->priv;
|
|
sdla_t* card = chan->card;
|
|
|
|
printk(KERN_INFO "%s: rebuild_header() called for interface %s!\n",
|
|
card->devname, dev->name);
|
|
return 1;
|
|
}
|
|
|
|
/*============================================================================
|
|
* Handle transmit timeout event from netif watchdog
|
|
*/
|
|
static void if_tx_timeout(struct net_device *dev)
|
|
{
|
|
fr_channel_t* chan = dev->priv;
|
|
sdla_t *card = chan->card;
|
|
|
|
/* If our device stays busy for at least 5 seconds then we will
|
|
* kick start the device by making dev->tbusy = 0. We expect
|
|
* that our device never stays busy more than 5 seconds. So this
|
|
* is only used as a last resort.
|
|
*/
|
|
|
|
chan->drvstats_if_send.if_send_tbusy++;
|
|
++chan->ifstats.collisions;
|
|
|
|
printk (KERN_INFO "%s: Transmit timed out on %s\n",
|
|
card->devname, dev->name);
|
|
chan->drvstats_if_send.if_send_tbusy_timeout++;
|
|
netif_wake_queue (dev);
|
|
|
|
}
|
|
|
|
|
|
/*============================================================================
|
|
* Send a packet on a network interface.
|
|
* o set tbusy flag (marks start of the transmission) to block a timer-based
|
|
* transmit from overlapping.
|
|
* o set critical flag when accessing board.
|
|
* o check link state. If link is not up, then drop the packet.
|
|
* o check channel status. If it's down then initiate a call.
|
|
* o pass a packet to corresponding WAN device.
|
|
* o free socket buffer
|
|
*
|
|
* Return: 0 complete (socket buffer must be freed)
|
|
* non-0 packet may be re-transmitted (tbusy must be set)
|
|
*
|
|
* Notes:
|
|
* 1. This routine is called either by the protocol stack or by the "net
|
|
* bottom half" (with interrupts enabled).
|
|
*
|
|
* 2. Using netif_start_queue() and netif_stop_queue()
|
|
* will inhibit further transmit requests from the protocol stack
|
|
* and can be used for flow control with protocol layer.
|
|
*/
|
|
static int if_send(struct sk_buff* skb, struct net_device* dev)
|
|
{
|
|
fr_channel_t* chan = dev->priv;
|
|
sdla_t* card = chan->card;
|
|
int err;
|
|
unsigned char *sendpacket;
|
|
fr508_flags_t* adptr_flags = card->flags;
|
|
int udp_type;
|
|
long delay_tx_queued = 0;
|
|
unsigned long smp_flags=0;
|
|
unsigned char attr = 0;
|
|
|
|
chan->drvstats_if_send.if_send_entry++;
|
|
|
|
netif_stop_queue(dev);
|
|
|
|
if (skb == NULL) {
|
|
/* if we get here, some higher layer thinks we've missed an
|
|
* tx-done interrupt.
|
|
*/
|
|
printk(KERN_INFO "%s: interface %s got kicked!\n",
|
|
card->devname, dev->name);
|
|
chan->drvstats_if_send.if_send_skb_null ++;
|
|
|
|
netif_wake_queue(dev);
|
|
return 0;
|
|
}
|
|
|
|
/* If a peripheral task is running just drop packets */
|
|
if (test_bit(PERI_CRIT, &card->wandev.critical)){
|
|
|
|
printk(KERN_INFO "%s: Critical in if_send(): Peripheral running!\n",
|
|
card->devname);
|
|
|
|
dev_kfree_skb_any(skb);
|
|
netif_start_queue(dev);
|
|
return 0;
|
|
}
|
|
|
|
/* We must set the 'tbusy' flag if we already have a packet queued for
|
|
transmission in the transmit interrupt handler. However, we must
|
|
ensure that the transmit interrupt does not reset the 'tbusy' flag
|
|
just before we set it, as this will result in a "transmit timeout".
|
|
*/
|
|
set_bit(SEND_TXIRQ_CRIT, (void*)&card->wandev.critical);
|
|
if(chan->transmit_length) {
|
|
netif_stop_queue(dev);
|
|
chan->tick_counter = jiffies;
|
|
clear_bit(SEND_TXIRQ_CRIT, (void*)&card->wandev.critical);
|
|
return 1;
|
|
}
|
|
clear_bit(SEND_TXIRQ_CRIT, (void*)&card->wandev.critical);
|
|
|
|
/* Move the if_header() code to here. By inserting frame
|
|
* relay header in if_header() we would break the
|
|
* tcpdump and other packet sniffers */
|
|
chan->fr_header_len = setup_fr_header(&skb,dev,chan->common.usedby);
|
|
if (chan->fr_header_len < 0 ){
|
|
++chan->ifstats.tx_dropped;
|
|
++card->wandev.stats.tx_dropped;
|
|
|
|
dev_kfree_skb_any(skb);
|
|
netif_start_queue(dev);
|
|
return 0;
|
|
}
|
|
|
|
sendpacket = skb->data;
|
|
|
|
udp_type = udp_pkt_type(skb, card);
|
|
|
|
if(udp_type != UDP_INVALID_TYPE) {
|
|
if(store_udp_mgmt_pkt(udp_type, UDP_PKT_FRM_STACK, card, skb,
|
|
chan->dlci)) {
|
|
adptr_flags->imask |= FR_INTR_TIMER;
|
|
if (udp_type == UDP_FPIPE_TYPE){
|
|
chan->drvstats_if_send.
|
|
if_send_PIPE_request ++;
|
|
}
|
|
}
|
|
netif_start_queue(dev);
|
|
return 0;
|
|
}
|
|
|
|
//FIXME: can we do better than sendpacket[2]?
|
|
if ((chan->common.usedby == WANPIPE) && (sendpacket[2] == 0x45)) {
|
|
|
|
/* check to see if the source IP address is a broadcast or */
|
|
/* multicast IP address */
|
|
if(chk_bcast_mcast_addr(card, dev, skb)){
|
|
++chan->ifstats.tx_dropped;
|
|
++card->wandev.stats.tx_dropped;
|
|
dev_kfree_skb_any(skb);
|
|
netif_start_queue(dev);
|
|
return 0;
|
|
}
|
|
}
|
|
|
|
|
|
/* Lock the S514/S508 card: SMP Supported */
|
|
s508_s514_lock(card,&smp_flags);
|
|
|
|
if (test_and_set_bit(SEND_CRIT, (void*)&card->wandev.critical)) {
|
|
|
|
chan->drvstats_if_send.if_send_critical_non_ISR ++;
|
|
chan->ifstats.tx_dropped ++;
|
|
printk(KERN_INFO "%s Critical in IF_SEND: if_send() already running!\n",
|
|
card->devname);
|
|
goto if_send_start_and_exit;
|
|
}
|
|
|
|
/* API packet check: minimum packet size must be greater than
|
|
* 16 byte API header */
|
|
if((chan->common.usedby == API) && (skb->len <= sizeof(api_tx_hdr_t))) {
|
|
++chan->ifstats.tx_dropped;
|
|
++card->wandev.stats.tx_dropped;
|
|
|
|
|
|
goto if_send_start_and_exit;
|
|
|
|
}else{
|
|
/* During API transmission, get rid of the API header */
|
|
if (chan->common.usedby == API) {
|
|
api_tx_hdr_t* api_tx_hdr;
|
|
api_tx_hdr = (api_tx_hdr_t*)&skb->data[0x00];
|
|
attr = api_tx_hdr->attr;
|
|
skb_pull(skb,sizeof(api_tx_hdr_t));
|
|
}
|
|
}
|
|
|
|
if (card->wandev.state != WAN_CONNECTED) {
|
|
chan->drvstats_if_send.if_send_wan_disconnected ++;
|
|
++chan->ifstats.tx_dropped;
|
|
++card->wandev.stats.tx_dropped;
|
|
|
|
} else if (chan->common.state != WAN_CONNECTED) {
|
|
chan->drvstats_if_send.if_send_dlci_disconnected ++;
|
|
|
|
/* Update the DLCI state in timer interrupt */
|
|
card->u.f.timer_int_enabled |= TMR_INT_ENABLED_UPDATE_STATE;
|
|
adptr_flags->imask |= FR_INTR_TIMER;
|
|
|
|
++chan->ifstats.tx_dropped;
|
|
++card->wandev.stats.tx_dropped;
|
|
|
|
} else if (!is_tx_ready(card, chan)) {
|
|
/* No tx buffers available, store for delayed transmit */
|
|
if (!setup_for_delayed_transmit(dev, skb)){
|
|
set_bit(1,&delay_tx_queued);
|
|
}
|
|
chan->drvstats_if_send.if_send_no_bfrs++;
|
|
|
|
} else if (!skb->protocol) {
|
|
/* No protocols drop packet */
|
|
chan->drvstats_if_send.if_send_protocol_error ++;
|
|
++card->wandev.stats.tx_errors;
|
|
|
|
} else if (test_bit(ARP_CRIT,&card->wandev.critical)){
|
|
/* We are trying to send an ARP Packet, block IP data until
|
|
* ARP is sent */
|
|
++chan->ifstats.tx_dropped;
|
|
++card->wandev.stats.tx_dropped;
|
|
|
|
} else {
|
|
//FIXME: IPX is not implemented in this version of Frame Relay ?
|
|
if((chan->common.usedby == WANPIPE) &&
|
|
sendpacket[1] == 0x00 &&
|
|
sendpacket[2] == 0x80 &&
|
|
sendpacket[6] == 0x81 &&
|
|
sendpacket[7] == 0x37) {
|
|
|
|
if( chan->enable_IPX ) {
|
|
switch_net_numbers(sendpacket,
|
|
chan->network_number, 0);
|
|
} else {
|
|
//FIXME: Take this out when IPX is fixed
|
|
printk(KERN_INFO
|
|
"%s: WARNING: Unsupported IPX data in send, packet dropped\n",
|
|
card->devname);
|
|
}
|
|
|
|
}else{
|
|
err = fr_send_data_header(card, chan->dlci, attr, skb->len, skb->data, chan->fr_header_len);
|
|
if (err) {
|
|
switch(err) {
|
|
case FRRES_CIR_OVERFLOW:
|
|
case FRRES_BUFFER_OVERFLOW:
|
|
if (!setup_for_delayed_transmit(dev, skb)){
|
|
set_bit(1,&delay_tx_queued);
|
|
}
|
|
chan->drvstats_if_send.
|
|
if_send_adptr_bfrs_full ++;
|
|
break;
|
|
|
|
case FRRES_TOO_LONG:
|
|
if (net_ratelimit()){
|
|
printk(KERN_INFO
|
|
"%s: Error: Frame too long, transmission failed %i\n",
|
|
card->devname, (unsigned int)skb->len);
|
|
}
|
|
/* Drop down to default */
|
|
default:
|
|
chan->drvstats_if_send.
|
|
if_send_dlci_disconnected ++;
|
|
++chan->ifstats.tx_dropped;
|
|
++card->wandev.stats.tx_dropped;
|
|
break;
|
|
}
|
|
} else {
|
|
chan->drvstats_if_send.
|
|
if_send_bfr_passed_to_adptr++;
|
|
++chan->ifstats.tx_packets;
|
|
++card->wandev.stats.tx_packets;
|
|
|
|
chan->ifstats.tx_bytes += skb->len;
|
|
card->wandev.stats.tx_bytes += skb->len;
|
|
dev->trans_start = jiffies;
|
|
}
|
|
}
|
|
}
|
|
|
|
if_send_start_and_exit:
|
|
|
|
netif_start_queue(dev);
|
|
|
|
/* If we queued the packet for transmission, we must not
|
|
* deallocate it. The packet is unlinked from the IP stack
|
|
* not copied. Therefore, we must keep the original packet */
|
|
if (!test_bit(1,&delay_tx_queued)) {
|
|
dev_kfree_skb_any(skb);
|
|
}else{
|
|
adptr_flags->imask |= FR_INTR_TXRDY;
|
|
card->u.f.tx_interrupts_pending ++;
|
|
}
|
|
|
|
clear_bit(SEND_CRIT, (void*)&card->wandev.critical);
|
|
|
|
s508_s514_unlock(card,&smp_flags);
|
|
|
|
return 0;
|
|
}
|
|
|
|
|
|
|
|
/*============================================================================
|
|
* Setup so that a frame can be transmitted on the occurrence of a transmit
|
|
* interrupt.
|
|
*/
|
|
static int setup_for_delayed_transmit(struct net_device* dev,
|
|
struct sk_buff *skb)
|
|
{
|
|
fr_channel_t* chan = dev->priv;
|
|
sdla_t* card = chan->card;
|
|
fr_dlci_interface_t* dlci_interface;
|
|
int len = skb->len;
|
|
|
|
/* Check that the dlci is properly configured,
|
|
* before using tx interrupt */
|
|
if (!chan->dlci_int_interface){
|
|
if (net_ratelimit()){
|
|
printk(KERN_INFO
|
|
"%s: ERROR on DLCI %i: Not configured properly !\n",
|
|
card->devname, chan->dlci);
|
|
printk(KERN_INFO "%s: Please contact Sangoma Technologies\n",
|
|
card->devname);
|
|
}
|
|
return 1;
|
|
}
|
|
|
|
dlci_interface = chan->dlci_int_interface;
|
|
|
|
if(chan->transmit_length) {
|
|
printk(KERN_INFO "%s: Big mess in setup_for_del...\n",
|
|
card->devname);
|
|
return 1;
|
|
}
|
|
|
|
if(len > FR_MAX_NO_DATA_BYTES_IN_FRAME) {
|
|
//FIXME: increment some statistic */
|
|
return 1;
|
|
}
|
|
|
|
skb_unlink(skb);
|
|
|
|
chan->transmit_length = len;
|
|
chan->delay_skb = skb;
|
|
|
|
dlci_interface->gen_interrupt |= FR_INTR_TXRDY;
|
|
dlci_interface->packet_length = len;
|
|
|
|
/* Turn on TX interrupt at the end of if_send */
|
|
return 0;
|
|
}
|
|
|
|
|
|
/*============================================================================
|
|
* Check to see if the packet to be transmitted contains a broadcast or
|
|
* multicast source IP address.
|
|
* Return 0 if not broadcast/multicast address, otherwise return 1.
|
|
*/
|
|
|
|
static int chk_bcast_mcast_addr(sdla_t *card, struct net_device* dev,
|
|
struct sk_buff *skb)
|
|
{
|
|
u32 src_ip_addr;
|
|
u32 broadcast_ip_addr = 0;
|
|
struct in_device *in_dev;
|
|
fr_channel_t* chan = dev->priv;
|
|
|
|
/* read the IP source address from the outgoing packet */
|
|
src_ip_addr = *(u32 *)(skb->data + 14);
|
|
|
|
/* read the IP broadcast address for the device */
|
|
in_dev = dev->ip_ptr;
|
|
if(in_dev != NULL) {
|
|
struct in_ifaddr *ifa= in_dev->ifa_list;
|
|
if(ifa != NULL)
|
|
broadcast_ip_addr = ifa->ifa_broadcast;
|
|
else
|
|
return 0;
|
|
}
|
|
|
|
/* check if the IP Source Address is a Broadcast address */
|
|
if((dev->flags & IFF_BROADCAST) && (src_ip_addr == broadcast_ip_addr)) {
|
|
printk(KERN_INFO
|
|
"%s: Broadcast Source Address silently discarded\n",
|
|
card->devname);
|
|
return 1;
|
|
}
|
|
|
|
/* check if the IP Source Address is a Multicast address */
|
|
if((chan->mc == WANOPT_NO) && (ntohl(src_ip_addr) >= 0xE0000001) &&
|
|
(ntohl(src_ip_addr) <= 0xFFFFFFFE)) {
|
|
printk(KERN_INFO
|
|
"%s: Multicast Source Address silently discarded\n",
|
|
card->devname);
|
|
return 1;
|
|
}
|
|
|
|
return 0;
|
|
}
|
|
|
|
/*============================================================================
|
|
* Reply to UDP Management system.
|
|
* Return nothing.
|
|
*/
|
|
static int reply_udp( unsigned char *data, unsigned int mbox_len )
|
|
{
|
|
unsigned short len, udp_length, temp, ip_length;
|
|
unsigned long ip_temp;
|
|
int even_bound = 0;
|
|
|
|
|
|
fr_udp_pkt_t *fr_udp_pkt = (fr_udp_pkt_t *)data;
|
|
|
|
/* Set length of packet */
|
|
len = //sizeof(fr_encap_hdr_t)+
|
|
sizeof(ip_pkt_t)+
|
|
sizeof(udp_pkt_t)+
|
|
sizeof(wp_mgmt_t)+
|
|
sizeof(cblock_t)+
|
|
mbox_len;
|
|
|
|
|
|
/* fill in UDP reply */
|
|
fr_udp_pkt->wp_mgmt.request_reply = UDPMGMT_REPLY;
|
|
|
|
/* fill in UDP length */
|
|
udp_length = sizeof(udp_pkt_t)+
|
|
sizeof(wp_mgmt_t)+
|
|
sizeof(cblock_t)+
|
|
mbox_len;
|
|
|
|
|
|
/* put it on an even boundary */
|
|
if ( udp_length & 0x0001 ) {
|
|
udp_length += 1;
|
|
len += 1;
|
|
even_bound = 1;
|
|
}
|
|
|
|
temp = (udp_length<<8)|(udp_length>>8);
|
|
fr_udp_pkt->udp_pkt.udp_length = temp;
|
|
|
|
/* swap UDP ports */
|
|
temp = fr_udp_pkt->udp_pkt.udp_src_port;
|
|
fr_udp_pkt->udp_pkt.udp_src_port =
|
|
fr_udp_pkt->udp_pkt.udp_dst_port;
|
|
fr_udp_pkt->udp_pkt.udp_dst_port = temp;
|
|
|
|
|
|
|
|
/* add UDP pseudo header */
|
|
temp = 0x1100;
|
|
*((unsigned short *)
|
|
(fr_udp_pkt->data+mbox_len+even_bound)) = temp;
|
|
temp = (udp_length<<8)|(udp_length>>8);
|
|
*((unsigned short *)
|
|
(fr_udp_pkt->data+mbox_len+even_bound+2)) = temp;
|
|
|
|
/* calculate UDP checksum */
|
|
fr_udp_pkt->udp_pkt.udp_checksum = 0;
|
|
|
|
fr_udp_pkt->udp_pkt.udp_checksum =
|
|
calc_checksum(&data[UDP_OFFSET/*+sizeof(fr_encap_hdr_t)*/],
|
|
udp_length+UDP_OFFSET);
|
|
|
|
/* fill in IP length */
|
|
ip_length = udp_length + sizeof(ip_pkt_t);
|
|
temp = (ip_length<<8)|(ip_length>>8);
|
|
fr_udp_pkt->ip_pkt.total_length = temp;
|
|
|
|
/* swap IP addresses */
|
|
ip_temp = fr_udp_pkt->ip_pkt.ip_src_address;
|
|
fr_udp_pkt->ip_pkt.ip_src_address =
|
|
fr_udp_pkt->ip_pkt.ip_dst_address;
|
|
fr_udp_pkt->ip_pkt.ip_dst_address = ip_temp;
|
|
|
|
|
|
/* fill in IP checksum */
|
|
fr_udp_pkt->ip_pkt.hdr_checksum = 0;
|
|
fr_udp_pkt->ip_pkt.hdr_checksum =
|
|
calc_checksum(&data[/*sizeof(fr_encap_hdr_t)*/0],
|
|
sizeof(ip_pkt_t));
|
|
|
|
return len;
|
|
} /* reply_udp */
|
|
|
|
unsigned short calc_checksum (char *data, int len)
|
|
{
|
|
unsigned short temp;
|
|
unsigned long sum=0;
|
|
int i;
|
|
|
|
for( i = 0; i <len; i+=2 ) {
|
|
memcpy(&temp,&data[i],2);
|
|
sum += (unsigned long)temp;
|
|
}
|
|
|
|
while (sum >> 16 ) {
|
|
sum = (sum & 0xffffUL) + (sum >> 16);
|
|
}
|
|
|
|
temp = (unsigned short)sum;
|
|
temp = ~temp;
|
|
|
|
if( temp == 0 )
|
|
temp = 0xffff;
|
|
|
|
return temp;
|
|
}
|
|
|
|
/*
|
|
If incoming is 0 (outgoing)- if the net numbers is ours make it 0
|
|
if incoming is 1 - if the net number is 0 make it ours
|
|
|
|
*/
|
|
static void switch_net_numbers(unsigned char *sendpacket, unsigned long network_number, unsigned char incoming)
|
|
{
|
|
unsigned long pnetwork_number;
|
|
|
|
pnetwork_number = (unsigned long)((sendpacket[14] << 24) +
|
|
(sendpacket[15] << 16) + (sendpacket[16] << 8) +
|
|
sendpacket[17]);
|
|
|
|
if (!incoming) {
|
|
/* If the destination network number is ours, make it 0 */
|
|
if( pnetwork_number == network_number) {
|
|
sendpacket[14] = sendpacket[15] = sendpacket[16] =
|
|
sendpacket[17] = 0x00;
|
|
}
|
|
} else {
|
|
/* If the incoming network is 0, make it ours */
|
|
if( pnetwork_number == 0) {
|
|
sendpacket[14] = (unsigned char)(network_number >> 24);
|
|
sendpacket[15] = (unsigned char)((network_number &
|
|
0x00FF0000) >> 16);
|
|
sendpacket[16] = (unsigned char)((network_number &
|
|
0x0000FF00) >> 8);
|
|
sendpacket[17] = (unsigned char)(network_number &
|
|
0x000000FF);
|
|
}
|
|
}
|
|
|
|
|
|
pnetwork_number = (unsigned long)((sendpacket[26] << 24) +
|
|
(sendpacket[27] << 16) + (sendpacket[28] << 8) +
|
|
sendpacket[29]);
|
|
|
|
if( !incoming ) {
|
|
/* If the source network is ours, make it 0 */
|
|
if( pnetwork_number == network_number) {
|
|
sendpacket[26] = sendpacket[27] = sendpacket[28] =
|
|
sendpacket[29] = 0x00;
|
|
}
|
|
} else {
|
|
/* If the source network is 0, make it ours */
|
|
if( pnetwork_number == 0 ) {
|
|
sendpacket[26] = (unsigned char)(network_number >> 24);
|
|
sendpacket[27] = (unsigned char)((network_number &
|
|
0x00FF0000) >> 16);
|
|
sendpacket[28] = (unsigned char)((network_number &
|
|
0x0000FF00) >> 8);
|
|
sendpacket[29] = (unsigned char)(network_number &
|
|
0x000000FF);
|
|
}
|
|
}
|
|
} /* switch_net_numbers */
|
|
|
|
/*============================================================================
|
|
* Get ethernet-style interface statistics.
|
|
* Return a pointer to struct enet_statistics.
|
|
*/
|
|
static struct net_device_stats *if_stats(struct net_device *dev)
|
|
{
|
|
fr_channel_t* chan = dev->priv;
|
|
|
|
if(chan == NULL)
|
|
return NULL;
|
|
|
|
return &chan->ifstats;
|
|
}
|
|
|
|
/****** Interrupt Handlers **************************************************/
|
|
|
|
/*============================================================================
|
|
* fr_isr: S508 frame relay interrupt service routine.
|
|
*
|
|
* Description:
|
|
* Frame relay main interrupt service route. This
|
|
* function check the interrupt type and takes
|
|
* the appropriate action.
|
|
*/
|
|
static void fr_isr (sdla_t* card)
|
|
{
|
|
fr508_flags_t* flags = card->flags;
|
|
char *ptr = &flags->iflag;
|
|
int i,err;
|
|
fr_mbox_t* mbox = card->mbox;
|
|
|
|
/* This flag prevents nesting of interrupts. See sdla_isr() routine
|
|
* in sdlamain.c. */
|
|
card->in_isr = 1;
|
|
|
|
++card->statistics.isr_entry;
|
|
|
|
|
|
/* All peripheral (configuraiton, re-configuration) events
|
|
* take presidence over the ISR. Thus, retrigger */
|
|
if (test_bit(PERI_CRIT, (void*)&card->wandev.critical)) {
|
|
++card->statistics.isr_already_critical;
|
|
goto fr_isr_exit;
|
|
}
|
|
|
|
if(card->hw.type != SDLA_S514) {
|
|
if (test_bit(SEND_CRIT, (void*)&card->wandev.critical)) {
|
|
printk(KERN_INFO "%s: Critical while in ISR: If Send Running!\n",
|
|
card->devname);
|
|
++card->statistics.isr_already_critical;
|
|
goto fr_isr_exit;
|
|
}
|
|
}
|
|
|
|
switch (flags->iflag) {
|
|
|
|
case FR_INTR_RXRDY: /* receive interrupt */
|
|
++card->statistics.isr_rx;
|
|
rx_intr(card);
|
|
break;
|
|
|
|
|
|
case FR_INTR_TXRDY: /* transmit interrupt */
|
|
++ card->statistics.isr_tx;
|
|
tx_intr(card);
|
|
break;
|
|
|
|
case FR_INTR_READY:
|
|
Intr_test_counter++;
|
|
++card->statistics.isr_intr_test;
|
|
break;
|
|
|
|
case FR_INTR_DLC: /* Event interrupt occurred */
|
|
mbox->cmd.command = FR_READ_STATUS;
|
|
mbox->cmd.length = 0;
|
|
err = sdla_exec(mbox) ? mbox->cmd.result : CMD_TIMEOUT;
|
|
if (err)
|
|
fr_event(card, err, mbox);
|
|
break;
|
|
|
|
case FR_INTR_TIMER: /* Timer interrupt */
|
|
timer_intr(card);
|
|
break;
|
|
|
|
default:
|
|
++card->statistics.isr_spurious;
|
|
spur_intr(card);
|
|
printk(KERN_INFO "%s: Interrupt Type 0x%02X!\n",
|
|
card->devname, flags->iflag);
|
|
|
|
printk(KERN_INFO "%s: ID Bytes = ",card->devname);
|
|
for(i = 0; i < 8; i ++)
|
|
printk(KERN_INFO "0x%02X ", *(ptr + 0x28 + i));
|
|
printk(KERN_INFO "\n");
|
|
|
|
break;
|
|
}
|
|
|
|
fr_isr_exit:
|
|
|
|
card->in_isr = 0;
|
|
flags->iflag = 0;
|
|
return;
|
|
}
|
|
|
|
|
|
|
|
/*===========================================================
|
|
* rx_intr Receive interrupt handler.
|
|
*
|
|
* Description
|
|
* Upon receiveing an interrupt:
|
|
* 1. Check that the firmware is in sync with
|
|
* the driver.
|
|
* 2. Find an appropriate network interface
|
|
* based on the received dlci number.
|
|
* 3. Check that the netowrk interface exists
|
|
* and that it's setup properly.
|
|
* 4. Copy the data into an skb buffer.
|
|
* 5. Check the packet type and take
|
|
* appropriate acton: UPD, API, ARP or Data.
|
|
*/
|
|
|
|
static void rx_intr (sdla_t* card)
|
|
{
|
|
fr_rx_buf_ctl_t* frbuf = card->rxmb;
|
|
fr508_flags_t* flags = card->flags;
|
|
fr_channel_t* chan;
|
|
char *ptr = &flags->iflag;
|
|
struct sk_buff* skb;
|
|
struct net_device* dev;
|
|
void* buf;
|
|
unsigned dlci, len, offs, len_incl_hdr;
|
|
int i, udp_type;
|
|
|
|
|
|
/* Check that firmware buffers are in sync */
|
|
if (frbuf->flag != 0x01) {
|
|
|
|
printk(KERN_INFO
|
|
"%s: corrupted Rx buffer @ 0x%X, flag = 0x%02X!\n",
|
|
card->devname, (unsigned)frbuf, frbuf->flag);
|
|
|
|
printk(KERN_INFO "%s: ID Bytes = ",card->devname);
|
|
for(i = 0; i < 8; i ++)
|
|
printk(KERN_INFO "0x%02X ", *(ptr + 0x28 + i));
|
|
printk(KERN_INFO "\n");
|
|
|
|
++card->statistics.rx_intr_corrupt_rx_bfr;
|
|
|
|
/* Bug Fix: Mar 6 2000
|
|
* If we get a corrupted mailbox, it means that driver
|
|
* is out of sync with the firmware. There is no recovery.
|
|
* If we don't turn off all interrupts for this card
|
|
* the machine will crash.
|
|
*/
|
|
printk(KERN_INFO "%s: Critical router failure ...!!!\n", card->devname);
|
|
printk(KERN_INFO "Please contact Sangoma Technologies !\n");
|
|
fr_set_intr_mode(card, 0, 0, 0);
|
|
return;
|
|
}
|
|
|
|
len = frbuf->length;
|
|
dlci = frbuf->dlci;
|
|
offs = frbuf->offset;
|
|
|
|
/* Find the network interface for this packet */
|
|
dev = find_channel(card, dlci);
|
|
|
|
|
|
/* Check that the network interface is active and
|
|
* properly setup */
|
|
if (dev == NULL) {
|
|
if( net_ratelimit()) {
|
|
printk(KERN_INFO "%s: received data on unconfigured DLCI %d!\n",
|
|
card->devname, dlci);
|
|
}
|
|
++card->statistics.rx_intr_on_orphaned_DLCI;
|
|
++card->wandev.stats.rx_dropped;
|
|
goto rx_done;
|
|
}
|
|
|
|
if ((chan = dev->priv) == NULL){
|
|
if( net_ratelimit()) {
|
|
printk(KERN_INFO "%s: received data on unconfigured DLCI %d!\n",
|
|
card->devname, dlci);
|
|
}
|
|
++card->statistics.rx_intr_on_orphaned_DLCI;
|
|
++card->wandev.stats.rx_dropped;
|
|
goto rx_done;
|
|
}
|
|
|
|
skb = dev_alloc_skb(len);
|
|
|
|
if (!netif_running(dev) || (skb == NULL)){
|
|
|
|
++chan->ifstats.rx_dropped;
|
|
|
|
if(skb == NULL) {
|
|
if (net_ratelimit()) {
|
|
printk(KERN_INFO
|
|
"%s: no socket buffers available!\n",
|
|
card->devname);
|
|
}
|
|
chan->drvstats_rx_intr.rx_intr_no_socket ++;
|
|
}
|
|
|
|
if (!netif_running(dev)){
|
|
chan->drvstats_rx_intr.
|
|
rx_intr_dev_not_started ++;
|
|
if (skb){
|
|
dev_kfree_skb_any(skb);
|
|
}
|
|
}
|
|
goto rx_done;
|
|
}
|
|
|
|
/* Copy data from the board into the socket buffer */
|
|
if ((offs + len) > card->u.f.rx_top + 1) {
|
|
unsigned tmp = card->u.f.rx_top - offs + 1;
|
|
|
|
buf = skb_put(skb, tmp);
|
|
sdla_peek(&card->hw, offs, buf, tmp);
|
|
offs = card->u.f.rx_base;
|
|
len -= tmp;
|
|
}
|
|
|
|
buf = skb_put(skb, len);
|
|
sdla_peek(&card->hw, offs, buf, len);
|
|
|
|
|
|
/* We got the packet from the bard.
|
|
* Check the packet type and take appropriate action */
|
|
|
|
udp_type = udp_pkt_type( skb, card );
|
|
|
|
if(udp_type != UDP_INVALID_TYPE) {
|
|
|
|
/* UDP Debug packet received, store the
|
|
* packet and handle it in timer interrupt */
|
|
|
|
skb_pull(skb, 1);
|
|
if (wanrouter_type_trans(skb, dev)){
|
|
if(store_udp_mgmt_pkt(udp_type,UDP_PKT_FRM_NETWORK,card,skb,dlci)){
|
|
|
|
flags->imask |= FR_INTR_TIMER;
|
|
|
|
if (udp_type == UDP_FPIPE_TYPE){
|
|
++chan->drvstats_rx_intr.rx_intr_PIPE_request;
|
|
}
|
|
}
|
|
}
|
|
|
|
}else if (chan->common.usedby == API) {
|
|
|
|
/* We are in API mode.
|
|
* Add an API header to the RAW packet
|
|
* and queue it into a circular buffer.
|
|
* Then kick the fr_bh() bottom half handler */
|
|
|
|
api_rx_hdr_t* api_rx_hdr;
|
|
chan->drvstats_rx_intr.rx_intr_bfr_passed_to_stack ++;
|
|
chan->ifstats.rx_packets ++;
|
|
card->wandev.stats.rx_packets ++;
|
|
|
|
chan->ifstats.rx_bytes += skb->len;
|
|
card->wandev.stats.rx_bytes += skb->len;
|
|
|
|
skb_push(skb, sizeof(api_rx_hdr_t));
|
|
api_rx_hdr = (api_rx_hdr_t*)&skb->data[0x00];
|
|
api_rx_hdr->attr = frbuf->attr;
|
|
api_rx_hdr->time_stamp = frbuf->tmstamp;
|
|
|
|
skb->protocol = htons(ETH_P_IP);
|
|
skb->mac.raw = skb->data;
|
|
skb->dev = dev;
|
|
skb->pkt_type = WAN_PACKET_DATA;
|
|
|
|
bh_enqueue(dev, skb);
|
|
|
|
trigger_fr_bh(chan);
|
|
|
|
}else if (handle_IPXWAN(skb->data,chan->name,chan->enable_IPX, chan->network_number)){
|
|
|
|
//FIXME: Frame Relay IPX is not supported, Yet !
|
|
//if (chan->enable_IPX) {
|
|
// fr_send(card, dlci, 0, skb->len,skb->data);
|
|
//}
|
|
dev_kfree_skb_any(skb);
|
|
|
|
} else if (is_arp(skb->data)) {
|
|
|
|
/* ARP support enabled Mar 16 2000
|
|
* Process incoming ARP reply/request, setup
|
|
* dynamic routes. */
|
|
|
|
if (process_ARP((arphdr_1490_t *)skb->data, card, dev)) {
|
|
if (net_ratelimit()){
|
|
printk (KERN_INFO
|
|
"%s: Error processing ARP Packet.\n",
|
|
card->devname);
|
|
}
|
|
}
|
|
dev_kfree_skb_any(skb);
|
|
|
|
} else if (skb->data[0] != 0x03) {
|
|
|
|
if (net_ratelimit()) {
|
|
printk(KERN_INFO "%s: Non IETF packet discarded.\n",
|
|
card->devname);
|
|
}
|
|
dev_kfree_skb_any(skb);
|
|
|
|
} else {
|
|
|
|
len_incl_hdr = skb->len;
|
|
/* Decapsulate packet and pass it up the
|
|
protocol stack */
|
|
skb->dev = dev;
|
|
|
|
if (chan->common.usedby == BRIDGE || chan->common.usedby == BRIDGE_NODE){
|
|
|
|
/* Make sure it's an Ethernet frame, otherwise drop it */
|
|
if (!memcmp(skb->data, "\x03\x00\x80\x00\x80\xC2\x00\x07", 8)) {
|
|
skb_pull(skb, 8);
|
|
skb->protocol=eth_type_trans(skb,dev);
|
|
}else{
|
|
++chan->drvstats_rx_intr.rx_intr_bfr_not_passed_to_stack;
|
|
++chan->ifstats.rx_errors;
|
|
++card->wandev.stats.rx_errors;
|
|
goto rx_done;
|
|
}
|
|
}else{
|
|
|
|
/* remove hardware header */
|
|
buf = skb_pull(skb, 1);
|
|
|
|
if (!wanrouter_type_trans(skb, dev)) {
|
|
|
|
/* can't decapsulate packet */
|
|
dev_kfree_skb_any(skb);
|
|
|
|
++chan->drvstats_rx_intr.rx_intr_bfr_not_passed_to_stack;
|
|
++chan->ifstats.rx_errors;
|
|
++card->wandev.stats.rx_errors;
|
|
goto rx_done;
|
|
}
|
|
skb->mac.raw = skb->data;
|
|
}
|
|
|
|
|
|
/* Send a packet up the IP stack */
|
|
skb->dev->last_rx = jiffies;
|
|
netif_rx(skb);
|
|
++chan->drvstats_rx_intr.rx_intr_bfr_passed_to_stack;
|
|
++chan->ifstats.rx_packets;
|
|
++card->wandev.stats.rx_packets;
|
|
|
|
chan->ifstats.rx_bytes += len_incl_hdr;
|
|
card->wandev.stats.rx_bytes += len_incl_hdr;
|
|
}
|
|
|
|
rx_done:
|
|
|
|
/* Release buffer element and calculate a pointer to the next one */
|
|
frbuf->flag = 0;
|
|
card->rxmb = ++frbuf;
|
|
if ((void*)frbuf > card->u.f.rxmb_last)
|
|
card->rxmb = card->u.f.rxmb_base;
|
|
|
|
}
|
|
|
|
/*==================================================================
|
|
* tx_intr: Transmit interrupt handler.
|
|
*
|
|
* Rationale:
|
|
* If the board is busy transmitting, if_send() will
|
|
* buffers a single packet and turn on
|
|
* the tx interrupt. Tx interrupt will be called
|
|
* by the board, once the firmware can send more
|
|
* data. Thus, no polling is required.
|
|
*
|
|
* Description:
|
|
* Tx interrupt is called for each
|
|
* configured dlci channel. Thus:
|
|
* 1. Obtain the netowrk interface based on the
|
|
* dlci number.
|
|
* 2. Check that network interface is up and
|
|
* properly setup.
|
|
* 3. Check for a buffered packet.
|
|
* 4. Transmit the packet.
|
|
* 5. If we are in WANPIPE mode, mark the
|
|
* NET_BH handler.
|
|
* 6. If we are in API mode, kick
|
|
* the AF_WANPIPE socket for more data.
|
|
*
|
|
*/
|
|
static void tx_intr(sdla_t *card)
|
|
{
|
|
fr508_flags_t* flags = card->flags;
|
|
fr_tx_buf_ctl_t* bctl;
|
|
struct net_device* dev;
|
|
fr_channel_t* chan;
|
|
|
|
if(card->hw.type == SDLA_S514){
|
|
bctl = (void*)(flags->tse_offs + card->hw.dpmbase);
|
|
}else{
|
|
bctl = (void*)(flags->tse_offs - FR_MB_VECTOR +
|
|
card->hw.dpmbase);
|
|
}
|
|
|
|
/* Find the structure and make it unbusy */
|
|
dev = find_channel(card, flags->dlci);
|
|
if (dev == NULL){
|
|
printk(KERN_INFO "NO DEV IN TX Interrupt\n");
|
|
goto end_of_tx_intr;
|
|
}
|
|
|
|
if ((chan = dev->priv) == NULL){
|
|
printk(KERN_INFO "NO CHAN IN TX Interrupt\n");
|
|
goto end_of_tx_intr;
|
|
}
|
|
|
|
if(!chan->transmit_length || !chan->delay_skb) {
|
|
printk(KERN_INFO "%s: tx int error - transmit length zero\n",
|
|
card->wandev.name);
|
|
goto end_of_tx_intr;
|
|
}
|
|
|
|
/* If the 'if_send()' procedure is currently checking the 'tbusy'
|
|
status, then we cannot transmit. Instead, we configure the microcode
|
|
so as to re-issue this transmit interrupt at a later stage.
|
|
*/
|
|
if (test_bit(SEND_TXIRQ_CRIT, (void*)&card->wandev.critical)) {
|
|
|
|
fr_dlci_interface_t* dlci_interface = chan->dlci_int_interface;
|
|
bctl->flag = 0xA0;
|
|
dlci_interface->gen_interrupt |= FR_INTR_TXRDY;
|
|
return;
|
|
|
|
}else{
|
|
bctl->dlci = flags->dlci;
|
|
bctl->length = chan->transmit_length+chan->fr_header_len;
|
|
sdla_poke(&card->hw,
|
|
fr_send_hdr(card,bctl->dlci,bctl->offset),
|
|
chan->delay_skb->data,
|
|
chan->delay_skb->len);
|
|
bctl->flag = 0xC0;
|
|
|
|
++chan->ifstats.tx_packets;
|
|
++card->wandev.stats.tx_packets;
|
|
chan->ifstats.tx_bytes += chan->transmit_length;
|
|
card->wandev.stats.tx_bytes += chan->transmit_length;
|
|
|
|
/* We must free an sk buffer, which we used
|
|
* for delayed transmission; Otherwise, the sock
|
|
* will run out of memory */
|
|
dev_kfree_skb_any(chan->delay_skb);
|
|
|
|
chan->delay_skb = NULL;
|
|
chan->transmit_length = 0;
|
|
|
|
dev->trans_start = jiffies;
|
|
|
|
if (netif_queue_stopped(dev)){
|
|
/* If using API, than wakeup socket BH handler */
|
|
if (chan->common.usedby == API){
|
|
netif_start_queue(dev);
|
|
wakeup_sk_bh(dev);
|
|
}else{
|
|
netif_wake_queue(dev);
|
|
}
|
|
}
|
|
}
|
|
|
|
end_of_tx_intr:
|
|
|
|
/* if any other interfaces have transmit interrupts pending,
|
|
* do not disable the global transmit interrupt */
|
|
if(!(-- card->u.f.tx_interrupts_pending))
|
|
flags->imask &= ~FR_INTR_TXRDY;
|
|
|
|
|
|
}
|
|
|
|
|
|
/*============================================================================
|
|
* timer_intr: Timer interrupt handler.
|
|
*
|
|
* Rationale:
|
|
* All commans must be executed within the timer
|
|
* interrupt since no two commands should execute
|
|
* at the same time.
|
|
*
|
|
* Description:
|
|
* The timer interrupt is used to:
|
|
* 1. Processing udp calls from 'fpipemon'.
|
|
* 2. Processing update calls from /proc file system
|
|
* 3. Reading board-level statistics for
|
|
* updating the proc file system.
|
|
* 4. Sending inverse ARP request packets.
|
|
* 5. Configure a dlci/channel.
|
|
* 6. Unconfigure a dlci/channel. (Node only)
|
|
*/
|
|
|
|
static void timer_intr(sdla_t *card)
|
|
{
|
|
fr508_flags_t* flags = card->flags;
|
|
|
|
/* UDP Debuging: fpipemon call */
|
|
if (card->u.f.timer_int_enabled & TMR_INT_ENABLED_UDP) {
|
|
if(card->u.f.udp_type == UDP_FPIPE_TYPE) {
|
|
if(process_udp_mgmt_pkt(card)) {
|
|
card->u.f.timer_int_enabled &=
|
|
~TMR_INT_ENABLED_UDP;
|
|
}
|
|
}
|
|
}
|
|
|
|
/* /proc update call : triggered from update() */
|
|
if (card->u.f.timer_int_enabled & TMR_INT_ENABLED_UPDATE) {
|
|
fr_get_err_stats(card);
|
|
fr_get_stats(card);
|
|
card->u.f.update_comms_stats = 0;
|
|
card->u.f.timer_int_enabled &= ~TMR_INT_ENABLED_UPDATE;
|
|
}
|
|
|
|
/* Update the channel state call. This is call is
|
|
* triggered by if_send() function */
|
|
if (card->u.f.timer_int_enabled & TMR_INT_ENABLED_UPDATE_STATE){
|
|
struct net_device *dev;
|
|
if (card->wandev.state == WAN_CONNECTED){
|
|
for (dev = card->wandev.dev; dev;
|
|
dev = *((struct net_device **)dev->priv)){
|
|
fr_channel_t *chan = dev->priv;
|
|
if (chan->common.state != WAN_CONNECTED){
|
|
update_chan_state(dev);
|
|
}
|
|
}
|
|
}
|
|
card->u.f.timer_int_enabled &= ~TMR_INT_ENABLED_UPDATE_STATE;
|
|
}
|
|
|
|
/* configure a dlci/channel */
|
|
if (card->u.f.timer_int_enabled & TMR_INT_ENABLED_CONFIG){
|
|
config_fr(card);
|
|
card->u.f.timer_int_enabled &= ~TMR_INT_ENABLED_CONFIG;
|
|
}
|
|
|
|
/* unconfigure a dlci/channel */
|
|
if (card->u.f.timer_int_enabled & TMR_INT_ENABLED_UNCONFIG){
|
|
unconfig_fr(card);
|
|
card->u.f.timer_int_enabled &= ~TMR_INT_ENABLED_UNCONFIG;
|
|
}
|
|
|
|
|
|
/* Transmit ARP packets */
|
|
if (card->u.f.timer_int_enabled & TMR_INT_ENABLED_ARP){
|
|
int i=0;
|
|
struct net_device *dev;
|
|
|
|
if (card->u.f.arp_dev == NULL)
|
|
card->u.f.arp_dev = card->wandev.dev;
|
|
|
|
dev = card->u.f.arp_dev;
|
|
|
|
for (;;){
|
|
|
|
fr_channel_t *chan = dev->priv;
|
|
|
|
/* If the interface is brought down cancel sending In-ARPs */
|
|
if (!(dev->flags&IFF_UP)){
|
|
clear_bit(0,&chan->inarp_ready);
|
|
}
|
|
|
|
if (test_bit(0,&chan->inarp_ready)){
|
|
|
|
if (check_tx_status(card,dev)){
|
|
set_bit(ARP_CRIT,&card->wandev.critical);
|
|
break;
|
|
}
|
|
|
|
if (!send_inarp_request(card,dev)){
|
|
trigger_fr_arp(dev);
|
|
chan->inarp_tick = jiffies;
|
|
}
|
|
|
|
clear_bit(0,&chan->inarp_ready);
|
|
dev = move_dev_to_next(card,dev);
|
|
break;
|
|
}
|
|
dev = move_dev_to_next(card,dev);
|
|
|
|
if (++i == card->wandev.new_if_cnt){
|
|
card->u.f.timer_int_enabled &= ~TMR_INT_ENABLED_ARP;
|
|
break;
|
|
}
|
|
}
|
|
card->u.f.arp_dev = dev;
|
|
}
|
|
|
|
if(!card->u.f.timer_int_enabled)
|
|
flags->imask &= ~FR_INTR_TIMER;
|
|
}
|
|
|
|
|
|
/*============================================================================
|
|
* spur_intr: Spurious interrupt handler.
|
|
*
|
|
* Description:
|
|
* We don't know this interrupt.
|
|
* Print a warning.
|
|
*/
|
|
|
|
static void spur_intr (sdla_t* card)
|
|
{
|
|
if (net_ratelimit()){
|
|
printk(KERN_INFO "%s: spurious interrupt!\n", card->devname);
|
|
}
|
|
}
|
|
|
|
|
|
//FIXME: Fix the IPX in next version
|
|
/*===========================================================================
|
|
* Return 0 for non-IPXWAN packet
|
|
* 1 for IPXWAN packet or IPX is not enabled!
|
|
* FIXME: Use a IPX structure here not offsets
|
|
*/
|
|
static int handle_IPXWAN(unsigned char *sendpacket,
|
|
char *devname, unsigned char enable_IPX,
|
|
unsigned long network_number)
|
|
{
|
|
int i;
|
|
|
|
if( sendpacket[1] == 0x00 && sendpacket[2] == 0x80 &&
|
|
sendpacket[6] == 0x81 && sendpacket[7] == 0x37) {
|
|
|
|
/* It's an IPX packet */
|
|
if (!enable_IPX){
|
|
/* Return 1 so we don't pass it up the stack. */
|
|
//FIXME: Take this out when IPX is fixed
|
|
if (net_ratelimit()){
|
|
printk (KERN_INFO
|
|
"%s: WARNING: Unsupported IPX packet received and dropped\n",
|
|
devname);
|
|
}
|
|
return 1;
|
|
}
|
|
} else {
|
|
/* It's not IPX so return and pass it up the stack. */
|
|
return 0;
|
|
}
|
|
|
|
if( sendpacket[24] == 0x90 && sendpacket[25] == 0x04){
|
|
/* It's IPXWAN */
|
|
|
|
if( sendpacket[10] == 0x02 && sendpacket[42] == 0x00){
|
|
|
|
/* It's a timer request packet */
|
|
printk(KERN_INFO "%s: Received IPXWAN Timer Request packet\n",
|
|
devname);
|
|
|
|
/* Go through the routing options and answer no to every
|
|
* option except Unnumbered RIP/SAP
|
|
*/
|
|
for(i = 49; sendpacket[i] == 0x00; i += 5){
|
|
/* 0x02 is the option for Unnumbered RIP/SAP */
|
|
if( sendpacket[i + 4] != 0x02){
|
|
sendpacket[i + 1] = 0;
|
|
}
|
|
}
|
|
|
|
/* Skip over the extended Node ID option */
|
|
if( sendpacket[i] == 0x04 ){
|
|
i += 8;
|
|
}
|
|
|
|
/* We also want to turn off all header compression opt.
|
|
*/
|
|
for(; sendpacket[i] == 0x80 ;){
|
|
sendpacket[i + 1] = 0;
|
|
i += (sendpacket[i + 2] << 8) + (sendpacket[i + 3]) + 4;
|
|
}
|
|
|
|
/* Set the packet type to timer response */
|
|
sendpacket[42] = 0x01;
|
|
|
|
printk(KERN_INFO "%s: Sending IPXWAN Timer Response\n",
|
|
devname);
|
|
|
|
} else if( sendpacket[42] == 0x02 ){
|
|
|
|
/* This is an information request packet */
|
|
printk(KERN_INFO
|
|
"%s: Received IPXWAN Information Request packet\n",
|
|
devname);
|
|
|
|
/* Set the packet type to information response */
|
|
sendpacket[42] = 0x03;
|
|
|
|
/* Set the router name */
|
|
sendpacket[59] = 'F';
|
|
sendpacket[60] = 'P';
|
|
sendpacket[61] = 'I';
|
|
sendpacket[62] = 'P';
|
|
sendpacket[63] = 'E';
|
|
sendpacket[64] = '-';
|
|
sendpacket[65] = CVHexToAscii(network_number >> 28);
|
|
sendpacket[66] = CVHexToAscii((network_number & 0x0F000000)>> 24);
|
|
sendpacket[67] = CVHexToAscii((network_number & 0x00F00000)>> 20);
|
|
sendpacket[68] = CVHexToAscii((network_number & 0x000F0000)>> 16);
|
|
sendpacket[69] = CVHexToAscii((network_number & 0x0000F000)>> 12);
|
|
sendpacket[70] = CVHexToAscii((network_number & 0x00000F00)>> 8);
|
|
sendpacket[71] = CVHexToAscii((network_number & 0x000000F0)>> 4);
|
|
sendpacket[72] = CVHexToAscii(network_number & 0x0000000F);
|
|
for(i = 73; i < 107; i+= 1)
|
|
{
|
|
sendpacket[i] = 0;
|
|
}
|
|
|
|
printk(KERN_INFO "%s: Sending IPXWAN Information Response packet\n",
|
|
devname);
|
|
} else {
|
|
|
|
printk(KERN_INFO "%s: Unknown IPXWAN packet!\n",devname);
|
|
return 0;
|
|
}
|
|
|
|
/* Set the WNodeID to our network address */
|
|
sendpacket[43] = (unsigned char)(network_number >> 24);
|
|
sendpacket[44] = (unsigned char)((network_number & 0x00FF0000) >> 16);
|
|
sendpacket[45] = (unsigned char)((network_number & 0x0000FF00) >> 8);
|
|
sendpacket[46] = (unsigned char)(network_number & 0x000000FF);
|
|
|
|
return 1;
|
|
}
|
|
|
|
/* If we get here, it's an IPX-data packet so it'll get passed up the
|
|
* stack.
|
|
* switch the network numbers
|
|
*/
|
|
switch_net_numbers(sendpacket, network_number ,1);
|
|
return 0;
|
|
}
|
|
/*============================================================================
|
|
* process_route
|
|
*
|
|
* Rationale:
|
|
* If the interface goes down, or we receive an ARP request,
|
|
* we have to change the network interface ip addresses.
|
|
* This cannot be done within the interrupt.
|
|
*
|
|
* Description:
|
|
*
|
|
* This routine is called as a polling routine to dynamically
|
|
* add/delete routes negotiated by inverse ARP. It is in this
|
|
* "task" because we don't want routes to be added while in
|
|
* interrupt context.
|
|
*
|
|
* Usage:
|
|
* This function is called by fr_poll() polling funtion.
|
|
*/
|
|
|
|
static void process_route(struct net_device *dev)
|
|
{
|
|
fr_channel_t *chan = dev->priv;
|
|
sdla_t *card = chan->card;
|
|
|
|
struct ifreq if_info;
|
|
struct sockaddr_in *if_data;
|
|
mm_segment_t fs = get_fs();
|
|
u32 ip_tmp;
|
|
int err;
|
|
|
|
|
|
switch(chan->route_flag){
|
|
|
|
case ADD_ROUTE:
|
|
|
|
/* Set remote addresses */
|
|
memset(&if_info, 0, sizeof(if_info));
|
|
strcpy(if_info.ifr_name, dev->name);
|
|
|
|
set_fs(get_ds()); /* get user space block */
|
|
|
|
if_data = (struct sockaddr_in *)&if_info.ifr_dstaddr;
|
|
if_data->sin_addr.s_addr = chan->ip_remote;
|
|
if_data->sin_family = AF_INET;
|
|
err = devinet_ioctl( SIOCSIFDSTADDR, &if_info );
|
|
|
|
set_fs(fs); /* restore old block */
|
|
|
|
if (err) {
|
|
printk(KERN_INFO
|
|
"%s: Route Add failed. Error: %d\n",
|
|
card->devname,err);
|
|
printk(KERN_INFO "%s: Address: %u.%u.%u.%u\n",
|
|
chan->name, NIPQUAD(chan->ip_remote));
|
|
|
|
}else {
|
|
printk(KERN_INFO "%s: Route Added Successfully: %u.%u.%u.%u\n",
|
|
card->devname,NIPQUAD(chan->ip_remote));
|
|
chan->route_flag = ROUTE_ADDED;
|
|
}
|
|
break;
|
|
|
|
case REMOVE_ROUTE:
|
|
|
|
/* Set remote addresses */
|
|
memset(&if_info, 0, sizeof(if_info));
|
|
strcpy(if_info.ifr_name, dev->name);
|
|
|
|
ip_tmp = get_ip_address(dev,WAN_POINTOPOINT_IP);
|
|
|
|
set_fs(get_ds()); /* get user space block */
|
|
|
|
if_data = (struct sockaddr_in *)&if_info.ifr_dstaddr;
|
|
if_data->sin_addr.s_addr = 0;
|
|
if_data->sin_family = AF_INET;
|
|
err = devinet_ioctl( SIOCSIFDSTADDR, &if_info );
|
|
|
|
set_fs(fs);
|
|
|
|
if (err) {
|
|
printk(KERN_INFO
|
|
"%s: Deleting of route failed. Error: %d\n",
|
|
card->devname,err);
|
|
printk(KERN_INFO "%s: Address: %u.%u.%u.%u\n",
|
|
dev->name,NIPQUAD(chan->ip_remote) );
|
|
|
|
} else {
|
|
printk(KERN_INFO "%s: Route Removed Sucessfuly: %u.%u.%u.%u\n",
|
|
card->devname,NIPQUAD(ip_tmp));
|
|
chan->route_flag = NO_ROUTE;
|
|
}
|
|
break;
|
|
|
|
} /* Case Statement */
|
|
|
|
}
|
|
|
|
|
|
|
|
/****** Frame Relay Firmware-Specific Functions *****************************/
|
|
|
|
/*============================================================================
|
|
* Read firmware code version.
|
|
* o fill string str with firmware version info.
|
|
*/
|
|
static int fr_read_version (sdla_t* card, char* str)
|
|
{
|
|
fr_mbox_t* mbox = card->mbox;
|
|
int retry = MAX_CMD_RETRY;
|
|
int err;
|
|
|
|
do
|
|
{
|
|
mbox->cmd.command = FR_READ_CODE_VERSION;
|
|
mbox->cmd.length = 0;
|
|
err = sdla_exec(mbox) ? mbox->cmd.result : CMD_TIMEOUT;
|
|
} while (err && retry-- && fr_event(card, err, mbox));
|
|
|
|
if (!err && str) {
|
|
int len = mbox->cmd.length;
|
|
memcpy(str, mbox->data, len);
|
|
str[len] = '\0';
|
|
}
|
|
return err;
|
|
}
|
|
|
|
/*============================================================================
|
|
* Set global configuration.
|
|
*/
|
|
static int fr_configure (sdla_t* card, fr_conf_t *conf)
|
|
{
|
|
fr_mbox_t* mbox = card->mbox;
|
|
int retry = MAX_CMD_RETRY;
|
|
int dlci_num = card->u.f.dlci_num;
|
|
int err, i;
|
|
|
|
do
|
|
{
|
|
memcpy(mbox->data, conf, sizeof(fr_conf_t));
|
|
|
|
if (dlci_num) for (i = 0; i < dlci_num; ++i)
|
|
((fr_conf_t*)mbox->data)->dlci[i] =
|
|
card->u.f.node_dlci[i];
|
|
|
|
mbox->cmd.command = FR_SET_CONFIG;
|
|
mbox->cmd.length =
|
|
sizeof(fr_conf_t) + dlci_num * sizeof(short);
|
|
|
|
err = sdla_exec(mbox) ? mbox->cmd.result : CMD_TIMEOUT;
|
|
|
|
} while (err && retry-- && fr_event(card, err, mbox));
|
|
|
|
/*NC Oct 12 2000 */
|
|
if (err != CMD_OK){
|
|
printk(KERN_ERR "%s: Frame Relay Configuration Failed: rc=0x%x\n",
|
|
card->devname,err);
|
|
}
|
|
|
|
return err;
|
|
}
|
|
|
|
/*============================================================================
|
|
* Set DLCI configuration.
|
|
*/
|
|
static int fr_dlci_configure (sdla_t* card, fr_dlc_conf_t *conf, unsigned dlci)
|
|
{
|
|
fr_mbox_t* mbox = card->mbox;
|
|
int retry = MAX_CMD_RETRY;
|
|
int err;
|
|
|
|
do
|
|
{
|
|
memcpy(mbox->data, conf, sizeof(fr_dlc_conf_t));
|
|
mbox->cmd.dlci = (unsigned short) dlci;
|
|
mbox->cmd.command = FR_SET_CONFIG;
|
|
mbox->cmd.length = sizeof(fr_dlc_conf_t);
|
|
err = sdla_exec(mbox) ? mbox->cmd.result : CMD_TIMEOUT;
|
|
} while (err && retry--);
|
|
|
|
return err;
|
|
}
|
|
/*============================================================================
|
|
* Set interrupt mode.
|
|
*/
|
|
static int fr_set_intr_mode (sdla_t* card, unsigned mode, unsigned mtu,
|
|
unsigned short timeout)
|
|
{
|
|
fr_mbox_t* mbox = card->mbox;
|
|
fr508_intr_ctl_t* ictl = (void*)mbox->data;
|
|
int retry = MAX_CMD_RETRY;
|
|
int err;
|
|
|
|
do
|
|
{
|
|
memset(ictl, 0, sizeof(fr508_intr_ctl_t));
|
|
ictl->mode = mode;
|
|
ictl->tx_len = mtu;
|
|
ictl->irq = card->hw.irq;
|
|
|
|
/* indicate timeout on timer */
|
|
if (mode & 0x20) ictl->timeout = timeout;
|
|
|
|
mbox->cmd.length = sizeof(fr508_intr_ctl_t);
|
|
mbox->cmd.command = FR_SET_INTR_MODE;
|
|
err = sdla_exec(mbox) ? mbox->cmd.result : CMD_TIMEOUT;
|
|
|
|
} while (err && retry-- && fr_event(card, err, mbox));
|
|
|
|
return err;
|
|
}
|
|
|
|
/*============================================================================
|
|
* Enable communications.
|
|
*/
|
|
static int fr_comm_enable (sdla_t* card)
|
|
{
|
|
fr_mbox_t* mbox = card->mbox;
|
|
int retry = MAX_CMD_RETRY;
|
|
int err;
|
|
|
|
do
|
|
{
|
|
mbox->cmd.command = FR_COMM_ENABLE;
|
|
mbox->cmd.length = 0;
|
|
err = sdla_exec(mbox) ? mbox->cmd.result : CMD_TIMEOUT;
|
|
} while (err && retry-- && fr_event(card, err, mbox));
|
|
|
|
return err;
|
|
}
|
|
|
|
/*============================================================================
|
|
* fr_comm_disable
|
|
*
|
|
* Warning: This functin is called by the shutdown() procedure. It is void
|
|
* since dev->priv are has already been deallocated and no
|
|
* error checking is possible using fr_event() function.
|
|
*/
|
|
static void fr_comm_disable (sdla_t* card)
|
|
{
|
|
fr_mbox_t* mbox = card->mbox;
|
|
int retry = MAX_CMD_RETRY;
|
|
int err;
|
|
|
|
do {
|
|
mbox->cmd.command = FR_SET_MODEM_STATUS;
|
|
mbox->cmd.length = 1;
|
|
mbox->data[0] = 0;
|
|
err = sdla_exec(mbox) ? mbox->cmd.result : CMD_TIMEOUT;
|
|
} while (err && retry--);
|
|
|
|
retry = MAX_CMD_RETRY;
|
|
|
|
do
|
|
{
|
|
mbox->cmd.command = FR_COMM_DISABLE;
|
|
mbox->cmd.length = 0;
|
|
err = sdla_exec(mbox) ? mbox->cmd.result : CMD_TIMEOUT;
|
|
} while (err && retry--);
|
|
|
|
return;
|
|
}
|
|
|
|
|
|
|
|
/*============================================================================
|
|
* Get communications error statistics.
|
|
*/
|
|
static int fr_get_err_stats (sdla_t* card)
|
|
{
|
|
fr_mbox_t* mbox = card->mbox;
|
|
int retry = MAX_CMD_RETRY;
|
|
int err;
|
|
|
|
|
|
do
|
|
{
|
|
mbox->cmd.command = FR_READ_ERROR_STATS;
|
|
mbox->cmd.length = 0;
|
|
mbox->cmd.dlci = 0;
|
|
err = sdla_exec(mbox) ? mbox->cmd.result : CMD_TIMEOUT;
|
|
} while (err && retry-- && fr_event(card, err, mbox));
|
|
|
|
if (!err) {
|
|
fr_comm_stat_t* stats = (void*)mbox->data;
|
|
card->wandev.stats.rx_over_errors = stats->rx_overruns;
|
|
card->wandev.stats.rx_crc_errors = stats->rx_bad_crc;
|
|
card->wandev.stats.rx_missed_errors = stats->rx_aborts;
|
|
card->wandev.stats.rx_length_errors = stats->rx_too_long;
|
|
card->wandev.stats.tx_aborted_errors = stats->tx_aborts;
|
|
|
|
}
|
|
|
|
return err;
|
|
}
|
|
|
|
/*============================================================================
|
|
* Get statistics.
|
|
*/
|
|
static int fr_get_stats (sdla_t* card)
|
|
{
|
|
fr_mbox_t* mbox = card->mbox;
|
|
int retry = MAX_CMD_RETRY;
|
|
int err;
|
|
|
|
|
|
do
|
|
{
|
|
mbox->cmd.command = FR_READ_STATISTICS;
|
|
mbox->cmd.length = 0;
|
|
mbox->cmd.dlci = 0;
|
|
err = sdla_exec(mbox) ? mbox->cmd.result : CMD_TIMEOUT;
|
|
} while (err && retry-- && fr_event(card, err, mbox));
|
|
|
|
if (!err) {
|
|
fr_link_stat_t* stats = (void*)mbox->data;
|
|
card->wandev.stats.rx_frame_errors = stats->rx_bad_format;
|
|
card->wandev.stats.rx_dropped =
|
|
stats->rx_dropped + stats->rx_dropped2;
|
|
}
|
|
|
|
return err;
|
|
}
|
|
|
|
/*============================================================================
|
|
* Add DLCI(s) (Access Node only!).
|
|
* This routine will perform the ADD_DLCIs command for the specified DLCI.
|
|
*/
|
|
static int fr_add_dlci (sdla_t* card, int dlci)
|
|
{
|
|
fr_mbox_t* mbox = card->mbox;
|
|
int retry = MAX_CMD_RETRY;
|
|
int err;
|
|
|
|
do
|
|
{
|
|
unsigned short* dlci_list = (void*)mbox->data;
|
|
|
|
mbox->cmd.length = sizeof(short);
|
|
dlci_list[0] = dlci;
|
|
mbox->cmd.command = FR_ADD_DLCI;
|
|
err = sdla_exec(mbox) ? mbox->cmd.result : CMD_TIMEOUT;
|
|
|
|
} while (err && retry-- && fr_event(card, err, mbox));
|
|
|
|
return err;
|
|
}
|
|
|
|
/*============================================================================
|
|
* Activate DLCI(s) (Access Node only!).
|
|
* This routine will perform the ACTIVATE_DLCIs command with a DLCI number.
|
|
*/
|
|
static int fr_activate_dlci (sdla_t* card, int dlci)
|
|
{
|
|
fr_mbox_t* mbox = card->mbox;
|
|
int retry = MAX_CMD_RETRY;
|
|
int err;
|
|
|
|
do
|
|
{
|
|
unsigned short* dlci_list = (void*)mbox->data;
|
|
|
|
mbox->cmd.length = sizeof(short);
|
|
dlci_list[0] = dlci;
|
|
mbox->cmd.command = FR_ACTIVATE_DLCI;
|
|
err = sdla_exec(mbox) ? mbox->cmd.result : CMD_TIMEOUT;
|
|
|
|
} while (err && retry-- && fr_event(card, err, mbox));
|
|
|
|
return err;
|
|
}
|
|
|
|
/*============================================================================
|
|
* Delete DLCI(s) (Access Node only!).
|
|
* This routine will perform the DELETE_DLCIs command with a DLCI number.
|
|
*/
|
|
static int fr_delete_dlci (sdla_t* card, int dlci)
|
|
{
|
|
fr_mbox_t* mbox = card->mbox;
|
|
int retry = MAX_CMD_RETRY;
|
|
int err;
|
|
|
|
do
|
|
{
|
|
unsigned short* dlci_list = (void*)mbox->data;
|
|
|
|
mbox->cmd.length = sizeof(short);
|
|
dlci_list[0] = dlci;
|
|
mbox->cmd.command = FR_DELETE_DLCI;
|
|
err = sdla_exec(mbox) ? mbox->cmd.result : CMD_TIMEOUT;
|
|
|
|
} while (err && retry-- && fr_event(card, err, mbox));
|
|
|
|
return err;
|
|
}
|
|
|
|
|
|
|
|
/*============================================================================
|
|
* Issue in-channel signalling frame.
|
|
*/
|
|
static int fr_issue_isf (sdla_t* card, int isf)
|
|
{
|
|
fr_mbox_t* mbox = card->mbox;
|
|
int retry = MAX_CMD_RETRY;
|
|
int err;
|
|
|
|
do
|
|
{
|
|
mbox->data[0] = isf;
|
|
mbox->cmd.length = 1;
|
|
mbox->cmd.command = FR_ISSUE_IS_FRAME;
|
|
err = sdla_exec(mbox) ? mbox->cmd.result : CMD_TIMEOUT;
|
|
} while (err && retry-- && fr_event(card, err, mbox));
|
|
|
|
return err;
|
|
}
|
|
|
|
|
|
static unsigned int fr_send_hdr (sdla_t*card, int dlci, unsigned int offset)
|
|
{
|
|
struct net_device *dev = find_channel(card,dlci);
|
|
fr_channel_t *chan;
|
|
|
|
if (!dev || !(chan=dev->priv))
|
|
return offset;
|
|
|
|
if (chan->fr_header_len){
|
|
sdla_poke(&card->hw, offset, chan->fr_header, chan->fr_header_len);
|
|
}
|
|
|
|
return offset+chan->fr_header_len;
|
|
}
|
|
|
|
/*============================================================================
|
|
* Send a frame on a selected DLCI.
|
|
*/
|
|
static int fr_send_data_header (sdla_t* card, int dlci, unsigned char attr, int len,
|
|
void *buf, unsigned char hdr_len)
|
|
{
|
|
fr_mbox_t* mbox = card->mbox + 0x800;
|
|
int retry = MAX_CMD_RETRY;
|
|
int err;
|
|
|
|
do
|
|
{
|
|
mbox->cmd.dlci = dlci;
|
|
mbox->cmd.attr = attr;
|
|
mbox->cmd.length = len+hdr_len;
|
|
mbox->cmd.command = FR_WRITE;
|
|
err = sdla_exec(mbox) ? mbox->cmd.result : CMD_TIMEOUT;
|
|
} while (err && retry-- && fr_event(card, err, mbox));
|
|
|
|
if (!err) {
|
|
fr_tx_buf_ctl_t* frbuf;
|
|
|
|
if(card->hw.type == SDLA_S514)
|
|
frbuf = (void*)(*(unsigned long*)mbox->data +
|
|
card->hw.dpmbase);
|
|
else
|
|
frbuf = (void*)(*(unsigned long*)mbox->data -
|
|
FR_MB_VECTOR + card->hw.dpmbase);
|
|
|
|
sdla_poke(&card->hw, fr_send_hdr(card,dlci,frbuf->offset), buf, len);
|
|
frbuf->flag = 0x01;
|
|
}
|
|
|
|
return err;
|
|
}
|
|
|
|
static int fr_send (sdla_t* card, int dlci, unsigned char attr, int len,
|
|
void *buf)
|
|
{
|
|
fr_mbox_t* mbox = card->mbox + 0x800;
|
|
int retry = MAX_CMD_RETRY;
|
|
int err;
|
|
|
|
do
|
|
{
|
|
mbox->cmd.dlci = dlci;
|
|
mbox->cmd.attr = attr;
|
|
mbox->cmd.length = len;
|
|
mbox->cmd.command = FR_WRITE;
|
|
err = sdla_exec(mbox) ? mbox->cmd.result : CMD_TIMEOUT;
|
|
} while (err && retry-- && fr_event(card, err, mbox));
|
|
|
|
if (!err) {
|
|
fr_tx_buf_ctl_t* frbuf;
|
|
|
|
if(card->hw.type == SDLA_S514)
|
|
frbuf = (void*)(*(unsigned long*)mbox->data +
|
|
card->hw.dpmbase);
|
|
else
|
|
frbuf = (void*)(*(unsigned long*)mbox->data -
|
|
FR_MB_VECTOR + card->hw.dpmbase);
|
|
|
|
sdla_poke(&card->hw, frbuf->offset, buf, len);
|
|
frbuf->flag = 0x01;
|
|
}
|
|
|
|
return err;
|
|
}
|
|
|
|
|
|
/****** Firmware Asynchronous Event Handlers ********************************/
|
|
|
|
/*============================================================================
|
|
* Main asyncronous event/error handler.
|
|
* This routine is called whenever firmware command returns non-zero
|
|
* return code.
|
|
*
|
|
* Return zero if previous command has to be cancelled.
|
|
*/
|
|
static int fr_event (sdla_t *card, int event, fr_mbox_t* mbox)
|
|
{
|
|
fr508_flags_t* flags = card->flags;
|
|
char *ptr = &flags->iflag;
|
|
int i;
|
|
|
|
switch (event) {
|
|
|
|
case FRRES_MODEM_FAILURE:
|
|
return fr_modem_failure(card, mbox);
|
|
|
|
case FRRES_CHANNEL_DOWN: {
|
|
struct net_device *dev;
|
|
|
|
/* Remove all routes from associated DLCI's */
|
|
for (dev = card->wandev.dev; dev;
|
|
dev = *((struct net_device **)dev->priv)) {
|
|
fr_channel_t *chan = dev->priv;
|
|
if (chan->route_flag == ROUTE_ADDED) {
|
|
chan->route_flag = REMOVE_ROUTE;
|
|
}
|
|
|
|
if (chan->inarp == INARP_CONFIGURED) {
|
|
chan->inarp = INARP_REQUEST;
|
|
}
|
|
|
|
/* If the link becomes disconnected then,
|
|
* all channels will be disconnected
|
|
* as well.
|
|
*/
|
|
set_chan_state(dev,WAN_DISCONNECTED);
|
|
}
|
|
|
|
wanpipe_set_state(card, WAN_DISCONNECTED);
|
|
return 1;
|
|
}
|
|
|
|
case FRRES_CHANNEL_UP: {
|
|
struct net_device *dev;
|
|
|
|
/* FIXME: Only startup devices that are on the list */
|
|
|
|
for (dev = card->wandev.dev; dev;
|
|
dev = *((struct net_device **)dev->priv)) {
|
|
|
|
set_chan_state(dev,WAN_CONNECTED);
|
|
}
|
|
|
|
wanpipe_set_state(card, WAN_CONNECTED);
|
|
return 1;
|
|
}
|
|
|
|
case FRRES_DLCI_CHANGE:
|
|
return fr_dlci_change(card, mbox);
|
|
|
|
case FRRES_DLCI_MISMATCH:
|
|
printk(KERN_INFO "%s: DLCI list mismatch!\n",
|
|
card->devname);
|
|
return 1;
|
|
|
|
case CMD_TIMEOUT:
|
|
printk(KERN_ERR "%s: command 0x%02X timed out!\n",
|
|
card->devname, mbox->cmd.command);
|
|
printk(KERN_INFO "%s: ID Bytes = ",card->devname);
|
|
for(i = 0; i < 8; i ++)
|
|
printk(KERN_INFO "0x%02X ", *(ptr + 0x18 + i));
|
|
printk(KERN_INFO "\n");
|
|
|
|
break;
|
|
|
|
case FRRES_DLCI_INACTIVE:
|
|
break;
|
|
|
|
case FRRES_CIR_OVERFLOW:
|
|
break;
|
|
|
|
case FRRES_BUFFER_OVERFLOW:
|
|
break;
|
|
|
|
default:
|
|
printk(KERN_INFO "%s: command 0x%02X returned 0x%02X!\n"
|
|
, card->devname, mbox->cmd.command, event);
|
|
}
|
|
|
|
return 0;
|
|
}
|
|
|
|
/*============================================================================
|
|
* Handle modem error.
|
|
*
|
|
* Return zero if previous command has to be cancelled.
|
|
*/
|
|
static int fr_modem_failure (sdla_t *card, fr_mbox_t* mbox)
|
|
{
|
|
printk(KERN_INFO "%s: physical link down! (modem error 0x%02X)\n",
|
|
card->devname, mbox->data[0]);
|
|
|
|
switch (mbox->cmd.command){
|
|
case FR_WRITE:
|
|
|
|
case FR_READ:
|
|
return 0;
|
|
}
|
|
|
|
return 1;
|
|
}
|
|
|
|
/*============================================================================
|
|
* Handle DLCI status change.
|
|
*
|
|
* Return zero if previous command has to be cancelled.
|
|
*/
|
|
static int fr_dlci_change (sdla_t *card, fr_mbox_t* mbox)
|
|
{
|
|
dlci_status_t* status = (void*)mbox->data;
|
|
int cnt = mbox->cmd.length / sizeof(dlci_status_t);
|
|
fr_channel_t *chan;
|
|
struct net_device* dev2;
|
|
|
|
|
|
for (; cnt; --cnt, ++status) {
|
|
|
|
unsigned short dlci= status->dlci;
|
|
struct net_device* dev = find_channel(card, dlci);
|
|
|
|
if (dev == NULL){
|
|
printk(KERN_INFO
|
|
"%s: CPE contains unconfigured DLCI= %d\n",
|
|
card->devname, dlci);
|
|
|
|
printk(KERN_INFO
|
|
"%s: unconfigured DLCI %d reported by network\n"
|
|
, card->devname, dlci);
|
|
|
|
}else{
|
|
if (status->state == FR_LINK_INOPER) {
|
|
printk(KERN_INFO
|
|
"%s: DLCI %u is inactive!\n",
|
|
card->devname, dlci);
|
|
|
|
if (dev && netif_running(dev))
|
|
set_chan_state(dev, WAN_DISCONNECTED);
|
|
}
|
|
|
|
if (status->state & FR_DLCI_DELETED) {
|
|
|
|
printk(KERN_INFO
|
|
"%s: DLCI %u has been deleted!\n",
|
|
card->devname, dlci);
|
|
|
|
if (dev && netif_running(dev)){
|
|
|
|
fr_channel_t *chan = dev->priv;
|
|
|
|
if (chan->route_flag == ROUTE_ADDED) {
|
|
chan->route_flag = REMOVE_ROUTE;
|
|
/* The state change will trigger
|
|
* the fr polling routine */
|
|
}
|
|
|
|
if (chan->inarp == INARP_CONFIGURED) {
|
|
chan->inarp = INARP_REQUEST;
|
|
}
|
|
|
|
set_chan_state(dev, WAN_DISCONNECTED);
|
|
}
|
|
|
|
} else if (status->state & FR_DLCI_ACTIVE) {
|
|
|
|
chan = dev->priv;
|
|
|
|
/* This flag is used for configuring specific
|
|
DLCI(s) when they become active.
|
|
*/
|
|
chan->dlci_configured = DLCI_CONFIG_PENDING;
|
|
|
|
set_chan_state(dev, WAN_CONNECTED);
|
|
|
|
}
|
|
}
|
|
}
|
|
|
|
for (dev2 = card->wandev.dev; dev2;
|
|
dev2 = *((struct net_device **)dev2->priv)){
|
|
|
|
chan = dev2->priv;
|
|
|
|
if (chan->dlci_configured == DLCI_CONFIG_PENDING) {
|
|
if (fr_init_dlci(card, chan)){
|
|
return 1;
|
|
}
|
|
}
|
|
|
|
}
|
|
return 1;
|
|
}
|
|
|
|
|
|
static int fr_init_dlci (sdla_t *card, fr_channel_t *chan)
|
|
{
|
|
fr_dlc_conf_t cfg;
|
|
|
|
memset(&cfg, 0, sizeof(cfg));
|
|
|
|
if ( chan->cir_status == CIR_DISABLED) {
|
|
|
|
cfg.cir_fwd = cfg.cir_bwd = 16;
|
|
cfg.bc_fwd = cfg.bc_bwd = 16;
|
|
cfg.conf_flags = 0x0001;
|
|
|
|
}else if (chan->cir_status == CIR_ENABLED) {
|
|
|
|
cfg.cir_fwd = cfg.cir_bwd = chan->cir;
|
|
cfg.bc_fwd = cfg.bc_bwd = chan->bc;
|
|
cfg.be_fwd = cfg.be_bwd = chan->be;
|
|
cfg.conf_flags = 0x0000;
|
|
}
|
|
|
|
if (fr_dlci_configure( card, &cfg , chan->dlci)){
|
|
printk(KERN_INFO
|
|
"%s: DLCI Configure failed for %d\n",
|
|
card->devname, chan->dlci);
|
|
return 1;
|
|
}
|
|
|
|
chan->dlci_configured = DLCI_CONFIGURED;
|
|
|
|
/* Read the interface byte mapping into the channel
|
|
* structure.
|
|
*/
|
|
read_DLCI_IB_mapping( card, chan );
|
|
|
|
return 0;
|
|
}
|
|
/******* Miscellaneous ******************************************************/
|
|
|
|
/*============================================================================
|
|
* Update channel state.
|
|
*/
|
|
static int update_chan_state(struct net_device* dev)
|
|
{
|
|
fr_channel_t* chan = dev->priv;
|
|
sdla_t* card = chan->card;
|
|
fr_mbox_t* mbox = card->mbox;
|
|
int retry = MAX_CMD_RETRY;
|
|
int err;
|
|
|
|
do
|
|
{
|
|
mbox->cmd.command = FR_LIST_ACTIVE_DLCI;
|
|
mbox->cmd.length = 0;
|
|
err = sdla_exec(mbox) ? mbox->cmd.result : CMD_TIMEOUT;
|
|
} while (err && retry-- && fr_event(card, err, mbox));
|
|
|
|
if (!err) {
|
|
|
|
unsigned short* list = (void*)mbox->data;
|
|
int cnt = mbox->cmd.length / sizeof(short);
|
|
|
|
err=1;
|
|
|
|
for (; cnt; --cnt, ++list) {
|
|
|
|
if (*list == chan->dlci) {
|
|
set_chan_state(dev, WAN_CONNECTED);
|
|
|
|
|
|
/* May 23 2000. NC
|
|
* When a dlci is added or restarted,
|
|
* the dlci_int_interface pointer must
|
|
* be reinitialized. */
|
|
if (!chan->dlci_int_interface){
|
|
err=fr_init_dlci (card,chan);
|
|
}
|
|
break;
|
|
}
|
|
}
|
|
}
|
|
|
|
return err;
|
|
}
|
|
|
|
/*============================================================================
|
|
* Set channel state.
|
|
*/
|
|
static void set_chan_state(struct net_device* dev, int state)
|
|
{
|
|
fr_channel_t* chan = dev->priv;
|
|
sdla_t* card = chan->card;
|
|
|
|
if (chan->common.state != state) {
|
|
|
|
switch (state) {
|
|
|
|
case WAN_CONNECTED:
|
|
printk(KERN_INFO
|
|
"%s: Interface %s: DLCI %d connected\n",
|
|
card->devname, dev->name, chan->dlci);
|
|
|
|
/* If the interface was previoulsy down,
|
|
* bring it up, since the channel is active */
|
|
|
|
trigger_fr_poll (dev);
|
|
trigger_fr_arp (dev);
|
|
break;
|
|
|
|
case WAN_CONNECTING:
|
|
printk(KERN_INFO
|
|
"%s: Interface %s: DLCI %d connecting\n",
|
|
card->devname, dev->name, chan->dlci);
|
|
break;
|
|
|
|
case WAN_DISCONNECTED:
|
|
printk (KERN_INFO
|
|
"%s: Interface %s: DLCI %d disconnected!\n",
|
|
card->devname, dev->name, chan->dlci);
|
|
|
|
/* If the interface is up, bring it down,
|
|
* since the channel is now disconnected */
|
|
trigger_fr_poll (dev);
|
|
break;
|
|
}
|
|
|
|
chan->common.state = state;
|
|
}
|
|
|
|
chan->state_tick = jiffies;
|
|
}
|
|
|
|
/*============================================================================
|
|
* Find network device by its channel number.
|
|
*
|
|
* We need this critical flag because we change
|
|
* the dlci_to_dev_map outside the interrupt.
|
|
*
|
|
* NOTE: del_if() functions updates this array, it uses
|
|
* the spin locks to avoid corruption.
|
|
*/
|
|
static struct net_device* find_channel(sdla_t* card, unsigned dlci)
|
|
{
|
|
if(dlci > HIGHEST_VALID_DLCI)
|
|
return NULL;
|
|
|
|
return(card->u.f.dlci_to_dev_map[dlci]);
|
|
}
|
|
|
|
/*============================================================================
|
|
* Check to see if a frame can be sent. If no transmit buffers available,
|
|
* enable transmit interrupts.
|
|
*
|
|
* Return: 1 - Tx buffer(s) available
|
|
* 0 - no buffers available
|
|
*/
|
|
static int is_tx_ready (sdla_t* card, fr_channel_t* chan)
|
|
{
|
|
unsigned char sb;
|
|
|
|
if(card->hw.type == SDLA_S514)
|
|
return 1;
|
|
|
|
sb = inb(card->hw.port);
|
|
if (sb & 0x02)
|
|
return 1;
|
|
|
|
return 0;
|
|
}
|
|
|
|
/*============================================================================
|
|
* Convert decimal string to unsigned integer.
|
|
* If len != 0 then only 'len' characters of the string are converted.
|
|
*/
|
|
static unsigned int dec_to_uint (unsigned char* str, int len)
|
|
{
|
|
unsigned val;
|
|
|
|
if (!len)
|
|
len = strlen(str);
|
|
|
|
for (val = 0; len && is_digit(*str); ++str, --len)
|
|
val = (val * 10) + (*str - (unsigned)'0');
|
|
|
|
return val;
|
|
}
|
|
|
|
|
|
|
|
/*=============================================================================
|
|
* Store a UDP management packet for later processing.
|
|
*/
|
|
|
|
static int store_udp_mgmt_pkt(int udp_type, char udp_pkt_src, sdla_t* card,
|
|
struct sk_buff *skb, int dlci)
|
|
{
|
|
int udp_pkt_stored = 0;
|
|
|
|
struct net_device *dev = find_channel(card, dlci);
|
|
fr_channel_t *chan;
|
|
|
|
if (!dev || !(chan=dev->priv))
|
|
return 1;
|
|
|
|
if(!card->u.f.udp_pkt_lgth && (skb->len <= MAX_LGTH_UDP_MGNT_PKT)){
|
|
card->u.f.udp_pkt_lgth = skb->len + chan->fr_header_len;
|
|
card->u.f.udp_type = udp_type;
|
|
card->u.f.udp_pkt_src = udp_pkt_src;
|
|
card->u.f.udp_dlci = dlci;
|
|
memcpy(card->u.f.udp_pkt_data, skb->data, skb->len);
|
|
card->u.f.timer_int_enabled |= TMR_INT_ENABLED_UDP;
|
|
udp_pkt_stored = 1;
|
|
|
|
}else{
|
|
printk(KERN_INFO "ERROR: UDP packet not stored for DLCI %d\n",
|
|
dlci);
|
|
}
|
|
|
|
if(udp_pkt_src == UDP_PKT_FRM_STACK){
|
|
dev_kfree_skb_any(skb);
|
|
}else{
|
|
dev_kfree_skb_any(skb);
|
|
}
|
|
|
|
return(udp_pkt_stored);
|
|
}
|
|
|
|
|
|
/*==============================================================================
|
|
* Process UDP call of type FPIPE8ND
|
|
*/
|
|
static int process_udp_mgmt_pkt(sdla_t* card)
|
|
{
|
|
|
|
int c_retry = MAX_CMD_RETRY;
|
|
unsigned char *buf;
|
|
unsigned char frames;
|
|
unsigned int len;
|
|
unsigned short buffer_length;
|
|
struct sk_buff *new_skb;
|
|
fr_mbox_t* mbox = card->mbox;
|
|
int err;
|
|
struct timeval tv;
|
|
int udp_mgmt_req_valid = 1;
|
|
struct net_device* dev;
|
|
fr_channel_t* chan;
|
|
fr_udp_pkt_t *fr_udp_pkt;
|
|
unsigned short num_trc_els;
|
|
fr_trc_el_t* ptr_trc_el;
|
|
fr_trc_el_t trc_el;
|
|
fpipemon_trc_t* fpipemon_trc;
|
|
|
|
char udp_pkt_src = card->u.f.udp_pkt_src;
|
|
int dlci = card->u.f.udp_dlci;
|
|
|
|
/* Find network interface for this packet */
|
|
dev = find_channel(card, dlci);
|
|
if (!dev){
|
|
card->u.f.udp_pkt_lgth = 0;
|
|
return 1;
|
|
}
|
|
if ((chan = dev->priv) == NULL){
|
|
card->u.f.udp_pkt_lgth = 0;
|
|
return 1;
|
|
}
|
|
|
|
/* If the UDP packet is from the network, we are going to have to
|
|
transmit a response. Before doing so, we must check to see that
|
|
we are not currently transmitting a frame (in 'if_send()') and
|
|
that we are not already in a 'delayed transmit' state.
|
|
*/
|
|
if(udp_pkt_src == UDP_PKT_FRM_NETWORK) {
|
|
if (check_tx_status(card,dev)){
|
|
card->u.f.udp_pkt_lgth = 0;
|
|
return 1;
|
|
}
|
|
}
|
|
|
|
fr_udp_pkt = (fr_udp_pkt_t *)card->u.f.udp_pkt_data;
|
|
|
|
if(udp_pkt_src == UDP_PKT_FRM_NETWORK) {
|
|
|
|
switch(fr_udp_pkt->cblock.command) {
|
|
|
|
case FR_READ_MODEM_STATUS:
|
|
case FR_READ_STATUS:
|
|
case FPIPE_ROUTER_UP_TIME:
|
|
case FR_READ_ERROR_STATS:
|
|
case FPIPE_DRIVER_STAT_GEN:
|
|
case FR_READ_STATISTICS:
|
|
case FR_READ_ADD_DLC_STATS:
|
|
case FR_READ_CONFIG:
|
|
case FR_READ_CODE_VERSION:
|
|
udp_mgmt_req_valid = 1;
|
|
break;
|
|
default:
|
|
udp_mgmt_req_valid = 0;
|
|
break;
|
|
}
|
|
}
|
|
|
|
if(!udp_mgmt_req_valid) {
|
|
/* set length to 0 */
|
|
fr_udp_pkt->cblock.length = 0;
|
|
/* set return code */
|
|
fr_udp_pkt->cblock.result = 0xCD;
|
|
|
|
chan->drvstats_gen.UDP_PIPE_mgmt_direction_err ++;
|
|
|
|
if (net_ratelimit()){
|
|
printk(KERN_INFO
|
|
"%s: Warning, Illegal UDP command attempted from network: %x\n",
|
|
card->devname,fr_udp_pkt->cblock.command);
|
|
}
|
|
|
|
} else {
|
|
|
|
switch(fr_udp_pkt->cblock.command) {
|
|
|
|
case FPIPE_ENABLE_TRACING:
|
|
if(!card->TracingEnabled) {
|
|
do {
|
|
mbox->cmd.command = FR_SET_TRACE_CONFIG;
|
|
mbox->cmd.length = 1;
|
|
mbox->cmd.dlci = 0x00;
|
|
mbox->data[0] = fr_udp_pkt->data[0] |
|
|
RESET_TRC;
|
|
err = sdla_exec(mbox) ?
|
|
mbox->cmd.result : CMD_TIMEOUT;
|
|
} while (err && c_retry-- && fr_event(card, err,
|
|
mbox));
|
|
|
|
if(err) {
|
|
card->TracingEnabled = 0;
|
|
/* set the return code */
|
|
fr_udp_pkt->cblock.result =
|
|
mbox->cmd.result;
|
|
mbox->cmd.length = 0;
|
|
break;
|
|
}
|
|
|
|
sdla_peek(&card->hw, NO_TRC_ELEMENTS_OFF,
|
|
&num_trc_els, 2);
|
|
sdla_peek(&card->hw, BASE_TRC_ELEMENTS_OFF,
|
|
&card->u.f.trc_el_base, 4);
|
|
card->u.f.curr_trc_el = card->u.f.trc_el_base;
|
|
card->u.f.trc_el_last = card->u.f.curr_trc_el +
|
|
((num_trc_els - 1) *
|
|
sizeof(fr_trc_el_t));
|
|
|
|
/* Calculate the maximum trace data area in */
|
|
/* the UDP packet */
|
|
card->u.f.trc_bfr_space=(MAX_LGTH_UDP_MGNT_PKT -
|
|
//sizeof(fr_encap_hdr_t) -
|
|
sizeof(ip_pkt_t) -
|
|
sizeof(udp_pkt_t) -
|
|
sizeof(wp_mgmt_t) -
|
|
sizeof(cblock_t));
|
|
|
|
/* set return code */
|
|
fr_udp_pkt->cblock.result = 0;
|
|
|
|
} else {
|
|
/* set return code to line trace already
|
|
enabled */
|
|
fr_udp_pkt->cblock.result = 1;
|
|
}
|
|
|
|
mbox->cmd.length = 0;
|
|
card->TracingEnabled = 1;
|
|
break;
|
|
|
|
|
|
case FPIPE_DISABLE_TRACING:
|
|
if(card->TracingEnabled) {
|
|
|
|
do {
|
|
mbox->cmd.command = FR_SET_TRACE_CONFIG;
|
|
mbox->cmd.length = 1;
|
|
mbox->cmd.dlci = 0x00;
|
|
mbox->data[0] = ~ACTIVATE_TRC;
|
|
err = sdla_exec(mbox) ?
|
|
mbox->cmd.result : CMD_TIMEOUT;
|
|
} while (err && c_retry-- && fr_event(card, err, mbox));
|
|
}
|
|
|
|
/* set return code */
|
|
fr_udp_pkt->cblock.result = 0;
|
|
mbox->cmd.length = 0;
|
|
card->TracingEnabled = 0;
|
|
break;
|
|
|
|
case FPIPE_GET_TRACE_INFO:
|
|
|
|
/* Line trace cannot be performed on the 502 */
|
|
if(!card->TracingEnabled) {
|
|
/* set return code */
|
|
fr_udp_pkt->cblock.result = 1;
|
|
mbox->cmd.length = 0;
|
|
break;
|
|
}
|
|
|
|
ptr_trc_el = (void *)card->u.f.curr_trc_el;
|
|
|
|
buffer_length = 0;
|
|
fr_udp_pkt->data[0x00] = 0x00;
|
|
|
|
for(frames = 0; frames < MAX_FRMS_TRACED; frames ++) {
|
|
|
|
sdla_peek(&card->hw, (unsigned long)ptr_trc_el,
|
|
(void *)&trc_el.flag,
|
|
sizeof(fr_trc_el_t));
|
|
if(trc_el.flag == 0x00) {
|
|
break;
|
|
}
|
|
if((card->u.f.trc_bfr_space - buffer_length)
|
|
< sizeof(fpipemon_trc_hdr_t)) {
|
|
fr_udp_pkt->data[0x00] |= MORE_TRC_DATA;
|
|
break;
|
|
}
|
|
|
|
fpipemon_trc =
|
|
(fpipemon_trc_t *)&fr_udp_pkt->data[buffer_length];
|
|
fpipemon_trc->fpipemon_trc_hdr.status =
|
|
trc_el.attr;
|
|
fpipemon_trc->fpipemon_trc_hdr.tmstamp =
|
|
trc_el.tmstamp;
|
|
fpipemon_trc->fpipemon_trc_hdr.length =
|
|
trc_el.length;
|
|
|
|
if(!trc_el.offset || !trc_el.length) {
|
|
|
|
fpipemon_trc->fpipemon_trc_hdr.data_passed = 0x00;
|
|
|
|
}else if((trc_el.length + sizeof(fpipemon_trc_hdr_t) + 1) >
|
|
(card->u.f.trc_bfr_space - buffer_length)){
|
|
|
|
fpipemon_trc->fpipemon_trc_hdr.data_passed = 0x00;
|
|
fr_udp_pkt->data[0x00] |= MORE_TRC_DATA;
|
|
|
|
}else {
|
|
fpipemon_trc->fpipemon_trc_hdr.data_passed = 0x01;
|
|
sdla_peek(&card->hw, trc_el.offset,
|
|
fpipemon_trc->data,
|
|
trc_el.length);
|
|
}
|
|
|
|
trc_el.flag = 0x00;
|
|
sdla_poke(&card->hw, (unsigned long)ptr_trc_el,
|
|
&trc_el.flag, 1);
|
|
|
|
ptr_trc_el ++;
|
|
if((void *)ptr_trc_el > card->u.f.trc_el_last)
|
|
ptr_trc_el = (void*)card->u.f.trc_el_base;
|
|
|
|
buffer_length += sizeof(fpipemon_trc_hdr_t);
|
|
if(fpipemon_trc->fpipemon_trc_hdr.data_passed) {
|
|
buffer_length += trc_el.length;
|
|
}
|
|
|
|
if(fr_udp_pkt->data[0x00] & MORE_TRC_DATA) {
|
|
break;
|
|
}
|
|
}
|
|
|
|
if(frames == MAX_FRMS_TRACED) {
|
|
fr_udp_pkt->data[0x00] |= MORE_TRC_DATA;
|
|
}
|
|
|
|
card->u.f.curr_trc_el = (void *)ptr_trc_el;
|
|
|
|
/* set the total number of frames passed */
|
|
fr_udp_pkt->data[0x00] |=
|
|
((frames << 1) & (MAX_FRMS_TRACED << 1));
|
|
|
|
/* set the data length and return code */
|
|
fr_udp_pkt->cblock.length = mbox->cmd.length = buffer_length;
|
|
fr_udp_pkt->cblock.result = 0;
|
|
break;
|
|
|
|
case FPIPE_FT1_READ_STATUS:
|
|
sdla_peek(&card->hw, 0xF020,
|
|
&fr_udp_pkt->data[0x00] , 2);
|
|
fr_udp_pkt->cblock.length = mbox->cmd.length = 2;
|
|
fr_udp_pkt->cblock.result = 0;
|
|
break;
|
|
|
|
case FPIPE_FLUSH_DRIVER_STATS:
|
|
init_chan_statistics(chan);
|
|
init_global_statistics(card);
|
|
mbox->cmd.length = 0;
|
|
break;
|
|
|
|
case FPIPE_ROUTER_UP_TIME:
|
|
do_gettimeofday(&tv);
|
|
chan->router_up_time = tv.tv_sec -
|
|
chan->router_start_time;
|
|
*(unsigned long *)&fr_udp_pkt->data =
|
|
chan->router_up_time;
|
|
mbox->cmd.length = fr_udp_pkt->cblock.length = 4;
|
|
fr_udp_pkt->cblock.result = 0;
|
|
break;
|
|
|
|
case FPIPE_DRIVER_STAT_IFSEND:
|
|
memcpy(fr_udp_pkt->data,
|
|
&chan->drvstats_if_send.if_send_entry,
|
|
sizeof(if_send_stat_t));
|
|
mbox->cmd.length = fr_udp_pkt->cblock.length =sizeof(if_send_stat_t);
|
|
fr_udp_pkt->cblock.result = 0;
|
|
break;
|
|
|
|
case FPIPE_DRIVER_STAT_INTR:
|
|
|
|
memcpy(fr_udp_pkt->data,
|
|
&card->statistics.isr_entry,
|
|
sizeof(global_stats_t));
|
|
|
|
memcpy(&fr_udp_pkt->data[sizeof(global_stats_t)],
|
|
&chan->drvstats_rx_intr.rx_intr_no_socket,
|
|
sizeof(rx_intr_stat_t));
|
|
|
|
mbox->cmd.length = fr_udp_pkt->cblock.length =
|
|
sizeof(global_stats_t) +
|
|
sizeof(rx_intr_stat_t);
|
|
fr_udp_pkt->cblock.result = 0;
|
|
break;
|
|
|
|
case FPIPE_DRIVER_STAT_GEN:
|
|
memcpy(fr_udp_pkt->data,
|
|
&chan->drvstats_gen.UDP_PIPE_mgmt_kmalloc_err,
|
|
sizeof(pipe_mgmt_stat_t));
|
|
|
|
memcpy(&fr_udp_pkt->data[sizeof(pipe_mgmt_stat_t)],
|
|
&card->statistics, sizeof(global_stats_t));
|
|
|
|
mbox->cmd.length = fr_udp_pkt->cblock.length = sizeof(global_stats_t)+
|
|
sizeof(rx_intr_stat_t);
|
|
fr_udp_pkt->cblock.result = 0;
|
|
break;
|
|
|
|
|
|
case FR_FT1_STATUS_CTRL:
|
|
if(fr_udp_pkt->data[0] == 1) {
|
|
if(rCount++ != 0 ){
|
|
fr_udp_pkt->cblock.result = 0;
|
|
mbox->cmd.length = 1;
|
|
break;
|
|
}
|
|
}
|
|
|
|
/* Disable FT1 MONITOR STATUS */
|
|
if(fr_udp_pkt->data[0] == 0) {
|
|
if( --rCount != 0) {
|
|
fr_udp_pkt->cblock.result = 0;
|
|
mbox->cmd.length = 1;
|
|
break;
|
|
}
|
|
}
|
|
goto udp_mgmt_dflt;
|
|
|
|
|
|
default:
|
|
udp_mgmt_dflt:
|
|
do {
|
|
memcpy(&mbox->cmd,
|
|
&fr_udp_pkt->cblock.command,
|
|
sizeof(fr_cmd_t));
|
|
if(mbox->cmd.length) {
|
|
memcpy(&mbox->data,
|
|
(char *)fr_udp_pkt->data,
|
|
mbox->cmd.length);
|
|
}
|
|
|
|
err = sdla_exec(mbox) ? mbox->cmd.result :
|
|
CMD_TIMEOUT;
|
|
} while (err && c_retry-- && fr_event(card, err, mbox));
|
|
|
|
if(!err)
|
|
chan->drvstats_gen.
|
|
UDP_PIPE_mgmt_adptr_cmnd_OK ++;
|
|
else
|
|
chan->drvstats_gen.
|
|
UDP_PIPE_mgmt_adptr_cmnd_timeout ++;
|
|
|
|
/* copy the result back to our buffer */
|
|
memcpy(&fr_udp_pkt->cblock.command,
|
|
&mbox->cmd, sizeof(fr_cmd_t));
|
|
|
|
if(mbox->cmd.length) {
|
|
memcpy(&fr_udp_pkt->data,
|
|
&mbox->data, mbox->cmd.length);
|
|
}
|
|
}
|
|
}
|
|
|
|
/* Fill UDP TTL */
|
|
fr_udp_pkt->ip_pkt.ttl = card->wandev.ttl;
|
|
len = reply_udp(card->u.f.udp_pkt_data, mbox->cmd.length);
|
|
|
|
if(udp_pkt_src == UDP_PKT_FRM_NETWORK) {
|
|
|
|
chan->fr_header_len=2;
|
|
chan->fr_header[0]=Q922_UI;
|
|
chan->fr_header[1]=NLPID_IP;
|
|
|
|
err = fr_send_data_header(card, dlci, 0, len,
|
|
card->u.f.udp_pkt_data,chan->fr_header_len);
|
|
if (err){
|
|
chan->drvstats_gen.UDP_PIPE_mgmt_adptr_send_passed ++;
|
|
}else{
|
|
chan->drvstats_gen.UDP_PIPE_mgmt_adptr_send_failed ++;
|
|
}
|
|
|
|
} else {
|
|
/* Allocate socket buffer */
|
|
if((new_skb = dev_alloc_skb(len)) != NULL) {
|
|
|
|
/* copy data into new_skb */
|
|
buf = skb_put(new_skb, len);
|
|
memcpy(buf, card->u.f.udp_pkt_data, len);
|
|
|
|
chan->drvstats_gen.
|
|
UDP_PIPE_mgmt_passed_to_stack ++;
|
|
new_skb->dev = dev;
|
|
new_skb->protocol = htons(ETH_P_IP);
|
|
new_skb->mac.raw = new_skb->data;
|
|
netif_rx(new_skb);
|
|
|
|
} else {
|
|
chan->drvstats_gen.UDP_PIPE_mgmt_no_socket ++;
|
|
printk(KERN_INFO
|
|
"%s: UDP mgmt cmnd, no socket buffers available!\n",
|
|
card->devname);
|
|
}
|
|
}
|
|
|
|
card->u.f.udp_pkt_lgth = 0;
|
|
|
|
return 1;
|
|
}
|
|
|
|
/*==============================================================================
|
|
* Send Inverse ARP Request
|
|
*/
|
|
|
|
int send_inarp_request(sdla_t *card, struct net_device *dev)
|
|
{
|
|
int err=0;
|
|
|
|
arphdr_1490_t *ArpPacket;
|
|
arphdr_fr_t *arphdr;
|
|
fr_channel_t *chan = dev->priv;
|
|
struct in_device *in_dev;
|
|
|
|
in_dev = dev->ip_ptr;
|
|
|
|
if(in_dev != NULL ) {
|
|
|
|
ArpPacket = kmalloc(sizeof(arphdr_1490_t) + sizeof(arphdr_fr_t), GFP_ATOMIC);
|
|
/* SNAP Header indicating ARP */
|
|
ArpPacket->control = 0x03;
|
|
ArpPacket->pad = 0x00;
|
|
ArpPacket->NLPID = 0x80;
|
|
ArpPacket->OUI[0] = 0;
|
|
ArpPacket->OUI[1] = 0;
|
|
ArpPacket->OUI[2] = 0;
|
|
ArpPacket->PID = 0x0608;
|
|
|
|
arphdr = (arphdr_fr_t *)(ArpPacket + 1); // Go to ARP Packet
|
|
|
|
/* InARP request */
|
|
arphdr->ar_hrd = 0x0F00; /* Frame Relay HW type */
|
|
arphdr->ar_pro = 0x0008; /* IP Protocol */
|
|
arphdr->ar_hln = 2; /* HW addr length */
|
|
arphdr->ar_pln = 4; /* IP addr length */
|
|
arphdr->ar_op = htons(0x08); /* InARP Request */
|
|
arphdr->ar_sha = 0; /* src HW DLCI - Doesn't matter */
|
|
if(in_dev->ifa_list != NULL)
|
|
arphdr->ar_sip = in_dev->ifa_list->ifa_local; /* Local Address */else
|
|
arphdr->ar_sip = 0;
|
|
arphdr->ar_tha = 0; /* dst HW DLCI - Doesn't matter */
|
|
arphdr->ar_tip = 0; /* Remote Address -- what we want */
|
|
|
|
err = fr_send(card, chan->dlci, 0, sizeof(arphdr_1490_t) + sizeof(arphdr_fr_t),
|
|
(void *)ArpPacket);
|
|
|
|
if (!err){
|
|
printk(KERN_INFO "\n%s: Sending InARP request on DLCI %d.\n",
|
|
card->devname, chan->dlci);
|
|
clear_bit(ARP_CRIT,&card->wandev.critical);
|
|
}
|
|
|
|
kfree(ArpPacket);
|
|
}else{
|
|
printk(KERN_INFO "%s: INARP ERROR: %s doesn't have a local IP address!\n",
|
|
card->devname,dev->name);
|
|
return 1;
|
|
}
|
|
|
|
return 0;
|
|
}
|
|
|
|
|
|
/*==============================================================================
|
|
* Check packet for ARP Type
|
|
*/
|
|
|
|
int is_arp(void *buf)
|
|
{
|
|
arphdr_1490_t *arphdr = (arphdr_1490_t *)buf;
|
|
|
|
if (arphdr->pad == 0x00 &&
|
|
arphdr->NLPID == 0x80 &&
|
|
arphdr->PID == 0x0608)
|
|
return 1;
|
|
else return 0;
|
|
}
|
|
|
|
/*==============================================================================
|
|
* Process ARP Packet Type
|
|
*/
|
|
|
|
int process_ARP(arphdr_1490_t *ArpPacket, sdla_t *card, struct net_device* dev)
|
|
{
|
|
|
|
|
|
arphdr_fr_t *arphdr = (arphdr_fr_t *)(ArpPacket + 1); /* Skip header */
|
|
fr_rx_buf_ctl_t* frbuf = card->rxmb;
|
|
struct in_device *in_dev;
|
|
fr_channel_t *chan = dev->priv;
|
|
|
|
/* Before we transmit ARP packet, we must check
|
|
* to see that we are not currently transmitting a
|
|
* frame (in 'if_send()') and that we are not
|
|
* already in a 'delayed transmit' state. */
|
|
if (check_tx_status(card,dev)){
|
|
if (net_ratelimit()){
|
|
printk(KERN_INFO "%s: Disabling comminication to process ARP\n",
|
|
card->devname);
|
|
}
|
|
set_bit(ARP_CRIT,&card->wandev.critical);
|
|
return 0;
|
|
}
|
|
|
|
in_dev = dev->ip_ptr;
|
|
|
|
/* Check that IP addresses exist for our network address */
|
|
if (in_dev == NULL || in_dev->ifa_list == NULL)
|
|
return -1;
|
|
|
|
switch (ntohs(arphdr->ar_op)) {
|
|
|
|
case 0x08: // Inverse ARP request -- Send Reply, add route.
|
|
|
|
/* Check for valid Address */
|
|
printk(KERN_INFO "%s: Recvd PtP addr -InArp Req: %u.%u.%u.%u\n",
|
|
card->devname, NIPQUAD(arphdr->ar_sip));
|
|
|
|
|
|
/* Check that the network address is the same as ours, only
|
|
* if the netowrk mask is not 255.255.255.255. Otherwise
|
|
* this check would not make sense */
|
|
|
|
if (in_dev->ifa_list->ifa_mask != 0xFFFFFFFF &&
|
|
(in_dev->ifa_list->ifa_mask & arphdr->ar_sip) !=
|
|
(in_dev->ifa_list->ifa_mask & in_dev->ifa_list->ifa_local)){
|
|
printk(KERN_INFO
|
|
"%s: Invalid PtP address. %u.%u.%u.%u InARP ignored.\n",
|
|
card->devname,NIPQUAD(arphdr->ar_sip));
|
|
|
|
printk(KERN_INFO "%s: mask %u.%u.%u.%u\n",
|
|
card->devname, NIPQUAD(in_dev->ifa_list->ifa_mask));
|
|
printk(KERN_INFO "%s: local %u.%u.%u.%u\n",
|
|
card->devname,NIPQUAD(in_dev->ifa_list->ifa_local));
|
|
return -1;
|
|
}
|
|
|
|
if (in_dev->ifa_list->ifa_local == arphdr->ar_sip){
|
|
printk(KERN_INFO
|
|
"%s: Local addr = PtP addr. InARP ignored.\n",
|
|
card->devname);
|
|
return -1;
|
|
}
|
|
|
|
arphdr->ar_op = htons(0x09); /* InARP Reply */
|
|
|
|
/* Set addresses */
|
|
arphdr->ar_tip = arphdr->ar_sip;
|
|
arphdr->ar_sip = in_dev->ifa_list->ifa_local;
|
|
|
|
chan->ip_local = in_dev->ifa_list->ifa_local;
|
|
chan->ip_remote = arphdr->ar_sip;
|
|
|
|
fr_send(card, frbuf->dlci, 0, frbuf->length, (void *)ArpPacket);
|
|
|
|
if (test_bit(ARP_CRIT,&card->wandev.critical)){
|
|
if (net_ratelimit()){
|
|
printk(KERN_INFO "%s: ARP Processed Enabling Communication!\n",
|
|
card->devname);
|
|
}
|
|
}
|
|
clear_bit(ARP_CRIT,&card->wandev.critical);
|
|
|
|
chan->ip_local = in_dev->ifa_list->ifa_local;
|
|
chan->ip_remote = arphdr->ar_sip;
|
|
|
|
/* Add Route Flag */
|
|
/* The route will be added in the polling routine so
|
|
that it is not interrupt context. */
|
|
|
|
chan->route_flag = ADD_ROUTE;
|
|
trigger_fr_poll (dev);
|
|
|
|
break;
|
|
|
|
case 0x09: // Inverse ARP reply
|
|
|
|
/* Check for valid Address */
|
|
printk(KERN_INFO "%s: Recvd PtP addr %u.%u.%u.%u -InArp Reply\n",
|
|
card->devname, NIPQUAD(arphdr->ar_sip));
|
|
|
|
|
|
/* Compare network addresses, only if network mask
|
|
* is not 255.255.255.255 It would not make sense
|
|
* to perform this test if the mask was all 1's */
|
|
|
|
if (in_dev->ifa_list->ifa_mask != 0xffffffff &&
|
|
(in_dev->ifa_list->ifa_mask & arphdr->ar_sip) !=
|
|
(in_dev->ifa_list->ifa_mask & in_dev->ifa_list->ifa_local)) {
|
|
|
|
printk(KERN_INFO "%s: Invalid PtP address. InARP ignored.\n",
|
|
card->devname);
|
|
return -1;
|
|
}
|
|
|
|
/* Make sure that the received IP address is not
|
|
* the same as our own local address */
|
|
if (in_dev->ifa_list->ifa_local == arphdr->ar_sip) {
|
|
printk(KERN_INFO "%s: Local addr = PtP addr. InARP ignored.\n",
|
|
card->devname);
|
|
return -1;
|
|
}
|
|
|
|
chan->ip_local = in_dev->ifa_list->ifa_local;
|
|
chan->ip_remote = arphdr->ar_sip;
|
|
|
|
/* Add Route Flag */
|
|
/* The route will be added in the polling routine so
|
|
that it is not interrupt context. */
|
|
|
|
chan->route_flag = ADD_ROUTE;
|
|
chan->inarp = INARP_CONFIGURED;
|
|
trigger_fr_poll(dev);
|
|
|
|
break;
|
|
default:
|
|
break; // ARP's and RARP's -- Shouldn't happen.
|
|
}
|
|
|
|
return 0;
|
|
}
|
|
|
|
|
|
/*============================================================
|
|
* trigger_fr_arp
|
|
*
|
|
* Description:
|
|
* Add an fr_arp() task into a arp
|
|
* timer handler for a specific dlci/interface.
|
|
* This will kick the fr_arp() routine
|
|
* within the specified time interval.
|
|
*
|
|
* Usage:
|
|
* This timer is used to send ARP requests at
|
|
* certain time intervals.
|
|
* Called by an interrupt to request an action
|
|
* at a later date.
|
|
*/
|
|
|
|
static void trigger_fr_arp(struct net_device *dev)
|
|
{
|
|
fr_channel_t* chan = dev->priv;
|
|
|
|
mod_timer(&chan->fr_arp_timer, jiffies + chan->inarp_interval * HZ);
|
|
return;
|
|
}
|
|
|
|
|
|
|
|
/*==============================================================================
|
|
* ARP Request Action
|
|
*
|
|
* This funciton is called by timer interrupt to send an arp request
|
|
* to the remote end.
|
|
*/
|
|
|
|
static void fr_arp (unsigned long data)
|
|
{
|
|
struct net_device *dev = (struct net_device *)data;
|
|
fr_channel_t *chan = dev->priv;
|
|
volatile sdla_t *card = chan->card;
|
|
fr508_flags_t* flags = card->flags;
|
|
|
|
/* Send ARP packets for all devs' until
|
|
* ARP state changes to CONFIGURED */
|
|
|
|
if (chan->inarp == INARP_REQUEST &&
|
|
chan->common.state == WAN_CONNECTED &&
|
|
card->wandev.state == WAN_CONNECTED){
|
|
set_bit(0,&chan->inarp_ready);
|
|
card->u.f.timer_int_enabled |= TMR_INT_ENABLED_ARP;
|
|
flags->imask |= FR_INTR_TIMER;
|
|
}
|
|
|
|
return;
|
|
}
|
|
|
|
|
|
/*==============================================================================
|
|
* Perform the Interrupt Test by running the READ_CODE_VERSION command MAX_INTR_
|
|
* TEST_COUNTER times.
|
|
*/
|
|
static int intr_test( sdla_t* card )
|
|
{
|
|
fr_mbox_t* mb = card->mbox;
|
|
int err,i;
|
|
|
|
err = fr_set_intr_mode(card, FR_INTR_READY, card->wandev.mtu, 0 );
|
|
|
|
if (err == CMD_OK) {
|
|
|
|
for ( i = 0; i < MAX_INTR_TEST_COUNTER; i++ ) {
|
|
/* Run command READ_CODE_VERSION */
|
|
mb->cmd.length = 0;
|
|
mb->cmd.command = FR_READ_CODE_VERSION;
|
|
err = sdla_exec(mb) ? mb->cmd.result : CMD_TIMEOUT;
|
|
if (err != CMD_OK)
|
|
fr_event(card, err, mb);
|
|
}
|
|
|
|
} else {
|
|
return err;
|
|
}
|
|
|
|
err = fr_set_intr_mode( card, 0, card->wandev.mtu, 0 );
|
|
|
|
if( err != CMD_OK )
|
|
return err;
|
|
|
|
return 0;
|
|
}
|
|
|
|
/*==============================================================================
|
|
* Determine what type of UDP call it is. FPIPE8ND ?
|
|
*/
|
|
static int udp_pkt_type( struct sk_buff *skb, sdla_t* card )
|
|
{
|
|
fr_udp_pkt_t *fr_udp_pkt = (fr_udp_pkt_t *)skb->data;
|
|
|
|
/* Quick HACK */
|
|
|
|
|
|
if((fr_udp_pkt->ip_pkt.protocol == UDPMGMT_UDP_PROTOCOL) &&
|
|
(fr_udp_pkt->ip_pkt.ver_inet_hdr_length == 0x45) &&
|
|
(fr_udp_pkt->udp_pkt.udp_dst_port ==
|
|
ntohs(card->wandev.udp_port)) &&
|
|
(fr_udp_pkt->wp_mgmt.request_reply ==
|
|
UDPMGMT_REQUEST)) {
|
|
if(!strncmp(fr_udp_pkt->wp_mgmt.signature,
|
|
UDPMGMT_FPIPE_SIGNATURE, 8)){
|
|
return UDP_FPIPE_TYPE;
|
|
}
|
|
}
|
|
return UDP_INVALID_TYPE;
|
|
}
|
|
|
|
|
|
/*==============================================================================
|
|
* Initializes the Statistics values in the fr_channel structure.
|
|
*/
|
|
void init_chan_statistics( fr_channel_t* chan)
|
|
{
|
|
memset(&chan->drvstats_if_send.if_send_entry, 0,
|
|
sizeof(if_send_stat_t));
|
|
memset(&chan->drvstats_rx_intr.rx_intr_no_socket, 0,
|
|
sizeof(rx_intr_stat_t));
|
|
memset(&chan->drvstats_gen.UDP_PIPE_mgmt_kmalloc_err, 0,
|
|
sizeof(pipe_mgmt_stat_t));
|
|
}
|
|
|
|
/*==============================================================================
|
|
* Initializes the Statistics values in the Sdla_t structure.
|
|
*/
|
|
void init_global_statistics( sdla_t* card )
|
|
{
|
|
/* Intialize global statistics for a card */
|
|
memset(&card->statistics.isr_entry, 0, sizeof(global_stats_t));
|
|
}
|
|
|
|
static void read_DLCI_IB_mapping( sdla_t* card, fr_channel_t* chan )
|
|
{
|
|
fr_mbox_t* mbox = card->mbox;
|
|
int retry = MAX_CMD_RETRY;
|
|
dlci_IB_mapping_t* result;
|
|
int err, counter, found;
|
|
|
|
do {
|
|
mbox->cmd.command = FR_READ_DLCI_IB_MAPPING;
|
|
mbox->cmd.length = 0;
|
|
err = sdla_exec(mbox) ? mbox->cmd.result : CMD_TIMEOUT;
|
|
} while (err && retry-- && fr_event(card, err, mbox));
|
|
|
|
if( mbox->cmd.result != 0){
|
|
printk(KERN_INFO "%s: Read DLCI IB Mapping failed\n",
|
|
chan->name);
|
|
}
|
|
|
|
counter = mbox->cmd.length / sizeof(dlci_IB_mapping_t);
|
|
result = (void *)mbox->data;
|
|
|
|
found = 0;
|
|
for (; counter; --counter, ++result) {
|
|
if ( result->dlci == chan->dlci ) {
|
|
chan->IB_addr = result->addr_value;
|
|
if(card->hw.type == SDLA_S514){
|
|
chan->dlci_int_interface =
|
|
(void*)(card->hw.dpmbase +
|
|
chan->IB_addr);
|
|
}else{
|
|
chan->dlci_int_interface =
|
|
(void*)(card->hw.dpmbase +
|
|
(chan->IB_addr & 0x00001FFF));
|
|
|
|
}
|
|
found = 1;
|
|
break;
|
|
}
|
|
}
|
|
if (!found)
|
|
printk( KERN_INFO "%s: DLCI %d not found by IB MAPPING cmd\n",
|
|
card->devname, chan->dlci);
|
|
}
|
|
|
|
|
|
|
|
void s508_s514_lock(sdla_t *card, unsigned long *smp_flags)
|
|
{
|
|
if (card->hw.type != SDLA_S514){
|
|
|
|
spin_lock_irqsave(&card->wandev.lock, *smp_flags);
|
|
}else{
|
|
spin_lock(&card->u.f.if_send_lock);
|
|
}
|
|
return;
|
|
}
|
|
|
|
|
|
void s508_s514_unlock(sdla_t *card, unsigned long *smp_flags)
|
|
{
|
|
if (card->hw.type != SDLA_S514){
|
|
|
|
spin_unlock_irqrestore (&card->wandev.lock, *smp_flags);
|
|
}else{
|
|
spin_unlock(&card->u.f.if_send_lock);
|
|
}
|
|
return;
|
|
}
|
|
|
|
|
|
|
|
/*----------------------------------------------------------------------
|
|
RECEIVE INTERRUPT: BOTTOM HALF HANDLERS
|
|
----------------------------------------------------------------------*/
|
|
|
|
|
|
/*========================================================
|
|
* bh_enqueue
|
|
*
|
|
* Description:
|
|
* Insert a received packet into a circular
|
|
* rx queue. This packet will be picked up
|
|
* by fr_bh() and sent up the stack to the
|
|
* user.
|
|
*
|
|
* Usage:
|
|
* This function is called by rx interrupt,
|
|
* in API mode.
|
|
*
|
|
*/
|
|
|
|
static int bh_enqueue(struct net_device *dev, struct sk_buff *skb)
|
|
{
|
|
/* Check for full */
|
|
fr_channel_t* chan = dev->priv;
|
|
sdla_t *card = chan->card;
|
|
|
|
|
|
if (atomic_read(&chan->bh_buff_used) == MAX_BH_BUFF){
|
|
++card->wandev.stats.rx_dropped;
|
|
dev_kfree_skb_any(skb);
|
|
return 1;
|
|
}
|
|
|
|
((bh_data_t *)&chan->bh_head[chan->bh_write])->skb = skb;
|
|
|
|
if (chan->bh_write == (MAX_BH_BUFF-1)){
|
|
chan->bh_write=0;
|
|
}else{
|
|
++chan->bh_write;
|
|
}
|
|
|
|
atomic_inc(&chan->bh_buff_used);
|
|
|
|
return 0;
|
|
}
|
|
|
|
|
|
/*========================================================
|
|
* trigger_fr_bh
|
|
*
|
|
* Description:
|
|
* Kick the fr_bh() handler
|
|
*
|
|
* Usage:
|
|
* rx interrupt calls this function during
|
|
* the API mode.
|
|
*/
|
|
|
|
static void trigger_fr_bh (fr_channel_t *chan)
|
|
{
|
|
if (!test_and_set_bit(0,&chan->tq_working)){
|
|
wanpipe_queue_work(&chan->common.wanpipe_work);
|
|
}
|
|
}
|
|
|
|
|
|
/*========================================================
|
|
* fr_bh
|
|
*
|
|
* Description:
|
|
* Frame relay receive BH handler.
|
|
* Dequeue data from the BH circular
|
|
* buffer and pass it up the API sock.
|
|
*
|
|
* Rationale:
|
|
* This fuction is used to offload the
|
|
* rx_interrupt during API operation mode.
|
|
* The fr_bh() function executes for each
|
|
* dlci/interface.
|
|
*
|
|
* Once receive interrupt copies data from the
|
|
* card into an skb buffer, the skb buffer
|
|
* is appended to a circular BH buffer.
|
|
* Then the interrupt kicks fr_bh() to finish the
|
|
* job at a later time (not within the interrupt).
|
|
*
|
|
* Usage:
|
|
* Interrupts use this to defer a task to
|
|
* a polling routine.
|
|
*
|
|
*/
|
|
|
|
static void fr_bh(struct net_device * dev)
|
|
{
|
|
fr_channel_t* chan = dev->priv;
|
|
sdla_t *card = chan->card;
|
|
struct sk_buff *skb;
|
|
|
|
if (atomic_read(&chan->bh_buff_used) == 0){
|
|
clear_bit(0, &chan->tq_working);
|
|
return;
|
|
}
|
|
|
|
while (atomic_read(&chan->bh_buff_used)){
|
|
|
|
if (chan->common.sk == NULL || chan->common.func == NULL){
|
|
clear_bit(0, &chan->tq_working);
|
|
return;
|
|
}
|
|
|
|
skb = ((bh_data_t *)&chan->bh_head[chan->bh_read])->skb;
|
|
|
|
if (skb != NULL){
|
|
|
|
if (chan->common.sk == NULL || chan->common.func == NULL){
|
|
++card->wandev.stats.rx_dropped;
|
|
++chan->ifstats.rx_dropped;
|
|
dev_kfree_skb_any(skb);
|
|
fr_bh_cleanup(dev);
|
|
continue;
|
|
}
|
|
|
|
if (chan->common.func(skb,dev,chan->common.sk) != 0){
|
|
/* Sock full cannot send, queue us for
|
|
* another try */
|
|
atomic_set(&chan->common.receive_block,1);
|
|
return;
|
|
}else{
|
|
fr_bh_cleanup(dev);
|
|
}
|
|
}else{
|
|
fr_bh_cleanup(dev);
|
|
}
|
|
}
|
|
clear_bit(0, &chan->tq_working);
|
|
|
|
return;
|
|
}
|
|
|
|
static int fr_bh_cleanup(struct net_device *dev)
|
|
{
|
|
fr_channel_t* chan = dev->priv;
|
|
|
|
((bh_data_t *)&chan->bh_head[chan->bh_read])->skb = NULL;
|
|
|
|
if (chan->bh_read == (MAX_BH_BUFF-1)){
|
|
chan->bh_read=0;
|
|
}else{
|
|
++chan->bh_read;
|
|
}
|
|
|
|
atomic_dec(&chan->bh_buff_used);
|
|
return 0;
|
|
}
|
|
|
|
|
|
/*----------------------------------------------------------------------
|
|
POLL BH HANDLERS AND KICK ROUTINES
|
|
----------------------------------------------------------------------*/
|
|
|
|
/*============================================================
|
|
* trigger_fr_poll
|
|
*
|
|
* Description:
|
|
* Add a fr_poll() task into a tq_scheduler bh handler
|
|
* for a specific dlci/interface. This will kick
|
|
* the fr_poll() routine at a later time.
|
|
*
|
|
* Usage:
|
|
* Interrupts use this to defer a taks to
|
|
* a polling routine.
|
|
*
|
|
*/
|
|
static void trigger_fr_poll(struct net_device *dev)
|
|
{
|
|
fr_channel_t* chan = dev->priv;
|
|
schedule_work(&chan->fr_poll_work);
|
|
return;
|
|
}
|
|
|
|
|
|
/*============================================================
|
|
* fr_poll
|
|
*
|
|
* Rationale:
|
|
* We cannot manipulate the routing tables, or
|
|
* ip addresses withing the interrupt. Therefore
|
|
* we must perform such actons outside an interrupt
|
|
* at a later time.
|
|
*
|
|
* Description:
|
|
* Frame relay polling routine, responsible for
|
|
* shutting down interfaces upon disconnect
|
|
* and adding/removing routes.
|
|
*
|
|
* Usage:
|
|
* This function is executed for each frame relay
|
|
* dlci/interface through a tq_schedule bottom half.
|
|
*
|
|
* trigger_fr_poll() function is used to kick
|
|
* the fr_poll routine.
|
|
*/
|
|
|
|
static void fr_poll(struct net_device *dev)
|
|
{
|
|
|
|
fr_channel_t* chan;
|
|
sdla_t *card;
|
|
u8 check_gateway=0;
|
|
|
|
if (!dev || (chan = dev->priv) == NULL)
|
|
return;
|
|
|
|
card = chan->card;
|
|
|
|
/* (Re)Configuraiton is in progress, stop what you are
|
|
* doing and get out */
|
|
if (test_bit(PERI_CRIT,&card->wandev.critical)){
|
|
return;
|
|
}
|
|
|
|
switch (chan->common.state){
|
|
|
|
case WAN_DISCONNECTED:
|
|
|
|
if (test_bit(DYN_OPT_ON,&chan->interface_down) &&
|
|
!test_bit(DEV_DOWN, &chan->interface_down) &&
|
|
dev->flags&IFF_UP){
|
|
|
|
printk(KERN_INFO "%s: Interface %s is Down.\n",
|
|
card->devname,dev->name);
|
|
change_dev_flags(dev,dev->flags&~IFF_UP);
|
|
set_bit(DEV_DOWN, &chan->interface_down);
|
|
chan->route_flag = NO_ROUTE;
|
|
|
|
}else{
|
|
if (chan->inarp != INARP_NONE)
|
|
process_route(dev);
|
|
}
|
|
break;
|
|
|
|
case WAN_CONNECTED:
|
|
|
|
if (test_bit(DYN_OPT_ON,&chan->interface_down) &&
|
|
test_bit(DEV_DOWN, &chan->interface_down) &&
|
|
!(dev->flags&IFF_UP)){
|
|
|
|
printk(KERN_INFO "%s: Interface %s is Up.\n",
|
|
card->devname,dev->name);
|
|
|
|
change_dev_flags(dev,dev->flags|IFF_UP);
|
|
clear_bit(DEV_DOWN, &chan->interface_down);
|
|
check_gateway=1;
|
|
}
|
|
|
|
if (chan->inarp != INARP_NONE){
|
|
process_route(dev);
|
|
check_gateway=1;
|
|
}
|
|
|
|
if (chan->gateway && check_gateway)
|
|
add_gateway(card,dev);
|
|
|
|
break;
|
|
|
|
}
|
|
|
|
return;
|
|
}
|
|
|
|
/*==============================================================
|
|
* check_tx_status
|
|
*
|
|
* Rationale:
|
|
* We cannot transmit from an interrupt while
|
|
* the if_send is transmitting data. Therefore,
|
|
* we must check whether the tx buffers are
|
|
* begin used, before we transmit from an
|
|
* interrupt.
|
|
*
|
|
* Description:
|
|
* Checks whether it's safe to use the transmit
|
|
* buffers.
|
|
*
|
|
* Usage:
|
|
* ARP and UDP handling routines use this function
|
|
* because, they need to transmit data during
|
|
* an interrupt.
|
|
*/
|
|
|
|
static int check_tx_status(sdla_t *card, struct net_device *dev)
|
|
{
|
|
|
|
if (card->hw.type == SDLA_S514){
|
|
if (test_bit(SEND_CRIT, (void*)&card->wandev.critical) ||
|
|
test_bit(SEND_TXIRQ_CRIT, (void*)&card->wandev.critical)) {
|
|
return 1;
|
|
}
|
|
}
|
|
|
|
if (netif_queue_stopped(dev) || (card->u.f.tx_interrupts_pending))
|
|
return 1;
|
|
|
|
return 0;
|
|
}
|
|
|
|
/*===============================================================
|
|
* move_dev_to_next
|
|
*
|
|
* Description:
|
|
* Move the dev pointer to the next location in the
|
|
* link list. Check if we are at the end of the
|
|
* list, if so start from the begining.
|
|
*
|
|
* Usage:
|
|
* Timer interrupt uses this function to efficiently
|
|
* step through the devices that need to send ARP data.
|
|
*
|
|
*/
|
|
|
|
struct net_device *move_dev_to_next(sdla_t *card, struct net_device *dev)
|
|
{
|
|
if (card->wandev.new_if_cnt != 1){
|
|
if (!*((struct net_device **)dev->priv))
|
|
return card->wandev.dev;
|
|
else
|
|
return *((struct net_device **)dev->priv);
|
|
}
|
|
return dev;
|
|
}
|
|
|
|
/*==============================================================
|
|
* trigger_config_fr
|
|
*
|
|
* Rationale:
|
|
* All commands must be performed inside of a
|
|
* interrupt.
|
|
*
|
|
* Description:
|
|
* Kick the config_fr() routine throught the
|
|
* timer interrupt.
|
|
*/
|
|
|
|
|
|
static void trigger_config_fr (sdla_t *card)
|
|
{
|
|
fr508_flags_t* flags = card->flags;
|
|
|
|
card->u.f.timer_int_enabled |= TMR_INT_ENABLED_CONFIG;
|
|
flags->imask |= FR_INTR_TIMER;
|
|
}
|
|
|
|
|
|
/*==============================================================
|
|
* config_fr
|
|
*
|
|
* Rationale:
|
|
* All commands must be performed inside of a
|
|
* interrupt.
|
|
&
|
|
* Description:
|
|
* Configure a DLCI. This function is executed
|
|
* by a timer_interrupt. The if_open() function
|
|
* triggers it.
|
|
*
|
|
* Usage:
|
|
* new_if() collects all data necessary to
|
|
* configure the DLCI. It sets the chan->dlci_ready
|
|
* bit. When the if_open() function is executed
|
|
* it checks this bit, and if its set it triggers
|
|
* the timer interrupt to execute the config_fr()
|
|
* function.
|
|
*/
|
|
|
|
static void config_fr (sdla_t *card)
|
|
{
|
|
struct net_device *dev;
|
|
fr_channel_t *chan;
|
|
|
|
for (dev = card->wandev.dev; dev;
|
|
dev = *((struct net_device **)dev->priv)) {
|
|
|
|
if ((chan=dev->priv) == NULL)
|
|
continue;
|
|
|
|
if (!test_bit(0,&chan->config_dlci))
|
|
continue;
|
|
|
|
clear_bit(0,&chan->config_dlci);
|
|
|
|
/* If signalling is set to NO, then setup
|
|
* DLCI addresses right away. Don't have to wait for
|
|
* link to connect.
|
|
*/
|
|
if (card->wandev.signalling == WANOPT_NO){
|
|
printk(KERN_INFO "%s: Signalling set to NO: Mapping DLCI's\n",
|
|
card->wandev.name);
|
|
if (fr_init_dlci(card,chan)){
|
|
printk(KERN_INFO "%s: ERROR: Failed to configure DLCI %i !\n",
|
|
card->devname, chan->dlci);
|
|
return;
|
|
}
|
|
}
|
|
|
|
if (card->wandev.station == WANOPT_CPE) {
|
|
|
|
update_chan_state(dev);
|
|
|
|
/* CPE: issue full status enquiry */
|
|
fr_issue_isf(card, FR_ISF_FSE);
|
|
|
|
} else {
|
|
/* FR switch: activate DLCI(s) */
|
|
|
|
/* For Switch emulation we have to ADD and ACTIVATE
|
|
* the DLCI(s) that were configured with the SET_DLCI_
|
|
* CONFIGURATION command. Add and Activate will fail if
|
|
* DLCI specified is not included in the list.
|
|
*
|
|
* Also If_open is called once for each interface. But
|
|
* it does not get in here for all the interface. So
|
|
* we have to pass the entire list of DLCI(s) to add
|
|
* activate routines.
|
|
*/
|
|
|
|
if (!check_dlci_config (card, chan)){
|
|
fr_add_dlci(card, chan->dlci);
|
|
fr_activate_dlci(card, chan->dlci);
|
|
}
|
|
}
|
|
|
|
card->u.f.dlci_to_dev_map[chan->dlci] = dev;
|
|
}
|
|
return;
|
|
}
|
|
|
|
|
|
/*==============================================================
|
|
* config_fr
|
|
*
|
|
* Rationale:
|
|
* All commands must be executed during an interrupt.
|
|
*
|
|
* Description:
|
|
* Trigger uncofig_fr() function through
|
|
* the timer interrupt.
|
|
*
|
|
*/
|
|
|
|
static void trigger_unconfig_fr(struct net_device *dev)
|
|
{
|
|
fr_channel_t *chan = dev->priv;
|
|
volatile sdla_t *card = chan->card;
|
|
unsigned long timeout;
|
|
fr508_flags_t* flags = card->flags;
|
|
int reset_critical=0;
|
|
|
|
if (test_bit(PERI_CRIT,(void*)&card->wandev.critical)){
|
|
clear_bit(PERI_CRIT,(void*)&card->wandev.critical);
|
|
reset_critical=1;
|
|
}
|
|
|
|
/* run unconfig_dlci() function
|
|
* throught the timer interrupt */
|
|
set_bit(0,(void*)&chan->unconfig_dlci);
|
|
card->u.f.timer_int_enabled |= TMR_INT_ENABLED_UNCONFIG;
|
|
flags->imask |= FR_INTR_TIMER;
|
|
|
|
/* Wait for the command to complete */
|
|
timeout = jiffies;
|
|
for(;;) {
|
|
|
|
if(!(card->u.f.timer_int_enabled & TMR_INT_ENABLED_UNCONFIG))
|
|
break;
|
|
|
|
if (time_after(jiffies, timeout + 1 * HZ)){
|
|
card->u.f.timer_int_enabled &= ~TMR_INT_ENABLED_UNCONFIG;
|
|
printk(KERN_INFO "%s: Failed to delete DLCI %i\n",
|
|
card->devname,chan->dlci);
|
|
break;
|
|
}
|
|
}
|
|
|
|
if (reset_critical){
|
|
set_bit(PERI_CRIT,(void*)&card->wandev.critical);
|
|
}
|
|
}
|
|
|
|
/*==============================================================
|
|
* unconfig_fr
|
|
*
|
|
* Rationale:
|
|
* All commands must be executed during an interrupt.
|
|
*
|
|
* Description:
|
|
* Remove the dlci from firmware.
|
|
* This funciton is used in NODE shutdown.
|
|
*/
|
|
|
|
static void unconfig_fr (sdla_t *card)
|
|
{
|
|
struct net_device *dev;
|
|
fr_channel_t *chan;
|
|
|
|
for (dev = card->wandev.dev; dev;
|
|
dev = *((struct net_device **)dev->priv)){
|
|
|
|
if ((chan=dev->priv) == NULL)
|
|
continue;
|
|
|
|
if (!test_bit(0,&chan->unconfig_dlci))
|
|
continue;
|
|
|
|
clear_bit(0,&chan->unconfig_dlci);
|
|
|
|
if (card->wandev.station == WANOPT_NODE){
|
|
printk(KERN_INFO "%s: Unconfiguring DLCI %i\n",
|
|
card->devname,chan->dlci);
|
|
fr_delete_dlci(card,chan->dlci);
|
|
}
|
|
card->u.f.dlci_to_dev_map[chan->dlci] = NULL;
|
|
}
|
|
}
|
|
|
|
static int setup_fr_header(struct sk_buff **skb_orig, struct net_device* dev,
|
|
char op_mode)
|
|
{
|
|
struct sk_buff *skb = *skb_orig;
|
|
fr_channel_t *chan=dev->priv;
|
|
|
|
if (op_mode == WANPIPE){
|
|
|
|
chan->fr_header[0]=Q922_UI;
|
|
|
|
switch (htons(skb->protocol)){
|
|
|
|
case ETH_P_IP:
|
|
chan->fr_header[1]=NLPID_IP;
|
|
break;
|
|
default:
|
|
return -EINVAL;
|
|
}
|
|
|
|
return 2;
|
|
}
|
|
|
|
/* If we are in bridging mode, we must apply
|
|
* an Ethernet header */
|
|
if (op_mode == BRIDGE || op_mode == BRIDGE_NODE){
|
|
|
|
|
|
/* Encapsulate the packet as a bridged Ethernet frame. */
|
|
#ifdef DEBUG
|
|
printk(KERN_INFO "%s: encapsulating skb for frame relay\n",
|
|
dev->name);
|
|
#endif
|
|
|
|
chan->fr_header[0] = 0x03;
|
|
chan->fr_header[1] = 0x00;
|
|
chan->fr_header[2] = 0x80;
|
|
chan->fr_header[3] = 0x00;
|
|
chan->fr_header[4] = 0x80;
|
|
chan->fr_header[5] = 0xC2;
|
|
chan->fr_header[6] = 0x00;
|
|
chan->fr_header[7] = 0x07;
|
|
|
|
/* Yuck. */
|
|
skb->protocol = ETH_P_802_3;
|
|
return 8;
|
|
|
|
}
|
|
|
|
return 0;
|
|
}
|
|
|
|
|
|
static int check_dlci_config (sdla_t *card, fr_channel_t *chan)
|
|
{
|
|
fr_mbox_t* mbox = card->mbox;
|
|
int err=0;
|
|
fr_conf_t *conf=NULL;
|
|
unsigned short dlci_num = chan->dlci;
|
|
int dlci_offset=0;
|
|
struct net_device *dev = NULL;
|
|
|
|
mbox->cmd.command = FR_READ_CONFIG;
|
|
mbox->cmd.length = 0;
|
|
mbox->cmd.dlci = dlci_num;
|
|
|
|
err = sdla_exec(mbox) ? mbox->cmd.result : CMD_TIMEOUT;
|
|
|
|
if (err == CMD_OK){
|
|
return 0;
|
|
}
|
|
|
|
for (dev = card->wandev.dev; dev;
|
|
dev=*((struct net_device **)dev->priv))
|
|
set_chan_state(dev,WAN_DISCONNECTED);
|
|
|
|
printk(KERN_INFO "DLCI %i Not configured, configuring\n",dlci_num);
|
|
|
|
mbox->cmd.command = FR_COMM_DISABLE;
|
|
mbox->cmd.length = 0;
|
|
err = sdla_exec(mbox) ? mbox->cmd.result : CMD_TIMEOUT;
|
|
if (err != CMD_OK){
|
|
fr_event(card, err, mbox);
|
|
return 2;
|
|
}
|
|
|
|
printk(KERN_INFO "Disabled Communications \n");
|
|
|
|
mbox->cmd.command = FR_READ_CONFIG;
|
|
mbox->cmd.length = 0;
|
|
mbox->cmd.dlci = 0;
|
|
|
|
err = sdla_exec(mbox) ? mbox->cmd.result : CMD_TIMEOUT;
|
|
|
|
if (err != CMD_OK){
|
|
fr_event(card, err, mbox);
|
|
return 2;
|
|
}
|
|
|
|
conf = (fr_conf_t *)mbox->data;
|
|
|
|
dlci_offset=0;
|
|
for (dev = card->wandev.dev; dev;
|
|
dev = *((struct net_device **)dev->priv)) {
|
|
fr_channel_t *chan_tmp = dev->priv;
|
|
conf->dlci[dlci_offset] = chan_tmp->dlci;
|
|
dlci_offset++;
|
|
}
|
|
|
|
printk(KERN_INFO "Got Fr configuration Buffer Length is %x Dlci %i Dlci Off %i\n",
|
|
mbox->cmd.length,
|
|
mbox->cmd.length > 0x20 ? conf->dlci[0] : -1,
|
|
dlci_offset );
|
|
|
|
mbox->cmd.length = 0x20 + dlci_offset*2;
|
|
|
|
mbox->cmd.command = FR_SET_CONFIG;
|
|
mbox->cmd.dlci = 0;
|
|
|
|
err = sdla_exec(mbox) ? mbox->cmd.result : CMD_TIMEOUT;
|
|
|
|
if (err != CMD_OK){
|
|
fr_event(card, err, mbox);
|
|
return 2;
|
|
}
|
|
|
|
initialize_rx_tx_buffers (card);
|
|
|
|
|
|
printk(KERN_INFO "Configuraiton Succeded for new DLCI %i\n",dlci_num);
|
|
|
|
if (fr_comm_enable (card)){
|
|
return 2;
|
|
}
|
|
|
|
printk(KERN_INFO "Enabling Communications \n");
|
|
|
|
for (dev = card->wandev.dev; dev;
|
|
dev = *((struct net_device **)dev->priv)) {
|
|
fr_channel_t *chan_tmp = dev->priv;
|
|
fr_init_dlci(card,chan_tmp);
|
|
fr_add_dlci(card, chan_tmp->dlci);
|
|
fr_activate_dlci(card, chan_tmp->dlci);
|
|
}
|
|
|
|
printk(KERN_INFO "END OF CONFIGURAITON %i\n",dlci_num);
|
|
|
|
return 1;
|
|
}
|
|
|
|
static void initialize_rx_tx_buffers (sdla_t *card)
|
|
{
|
|
fr_buf_info_t* buf_info;
|
|
|
|
if (card->hw.type == SDLA_S514) {
|
|
|
|
buf_info = (void*)(card->hw.dpmbase + FR_MB_VECTOR +
|
|
FR508_RXBC_OFFS);
|
|
|
|
card->rxmb = (void*)(buf_info->rse_next + card->hw.dpmbase);
|
|
|
|
card->u.f.rxmb_base =
|
|
(void*)(buf_info->rse_base + card->hw.dpmbase);
|
|
|
|
card->u.f.rxmb_last =
|
|
(void*)(buf_info->rse_base +
|
|
(buf_info->rse_num - 1) * sizeof(fr_rx_buf_ctl_t) +
|
|
card->hw.dpmbase);
|
|
}else{
|
|
buf_info = (void*)(card->hw.dpmbase + FR508_RXBC_OFFS);
|
|
|
|
card->rxmb = (void*)(buf_info->rse_next -
|
|
FR_MB_VECTOR + card->hw.dpmbase);
|
|
|
|
card->u.f.rxmb_base =
|
|
(void*)(buf_info->rse_base -
|
|
FR_MB_VECTOR + card->hw.dpmbase);
|
|
|
|
card->u.f.rxmb_last =
|
|
(void*)(buf_info->rse_base +
|
|
(buf_info->rse_num - 1) * sizeof(fr_rx_buf_ctl_t) -
|
|
FR_MB_VECTOR + card->hw.dpmbase);
|
|
}
|
|
|
|
card->u.f.rx_base = buf_info->buf_base;
|
|
card->u.f.rx_top = buf_info->buf_top;
|
|
|
|
card->u.f.tx_interrupts_pending = 0;
|
|
|
|
return;
|
|
}
|
|
|
|
|
|
|
|
MODULE_LICENSE("GPL");
|
|
|
|
/****** End *****************************************************************/
|