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Commit c46920da authored by David S. Miller's avatar David S. Miller
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Merge branch 'for-david' of git://git.kernel.org/pub/scm/linux/kernel/git/chris/linux-2.6

parents f5f4cf08 6476a907
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Documentation/DocBook/Makefile
View file @ c46920da
......@@ -6,7 +6,7 @@
# To add a new book the only step required is to add the book to the
# list of DOCBOOKS.
DOCBOOKS := wanbook.xml z8530book.xml mcabook.xml \
DOCBOOKS := z8530book.xml mcabook.xml \
kernel-hacking.xml kernel-locking.xml deviceiobook.xml \
procfs-guide.xml writing_usb_driver.xml networking.xml \
kernel-api.xml filesystems.xml lsm.xml usb.xml kgdb.xml \
......
Documentation/DocBook/networking.tmpl
View file @ c46920da
......@@ -98,9 +98,6 @@
X!Enet/core/wireless.c
</sect1>
-->
<sect1><title>Synchronous PPP</title>
!Edrivers/net/wan/syncppp.c
</sect1>
</chapter>
</book>
Documentation/DocBook/wanbook.tmpl deleted 100644 → 0
View file @ f5f4cf08
<?xml version="1.0" encoding="UTF-8"?>
<!DOCTYPE book PUBLIC "-//OASIS//DTD DocBook XML V4.1.2//EN"
"http://www.oasis-open.org/docbook/xml/4.1.2/docbookx.dtd" []>
<book id="WANGuide">
<bookinfo>
<title>Synchronous PPP and Cisco HDLC Programming Guide</title>
<authorgroup>
<author>
<firstname>Alan</firstname>
<surname>Cox</surname>
<affiliation>
<address>
<email>alan@lxorguk.ukuu.org.uk</email>
</address>
</affiliation>
</author>
</authorgroup>
<copyright>
<year>2000</year>
<holder>Alan Cox</holder>
</copyright>
<legalnotice>
<para>
This documentation is free software; you can redistribute
it and/or modify it under the terms of the GNU General Public
License as published by the Free Software Foundation; either
version 2 of the License, or (at your option) any later
version.
</para>
<para>
This program is distributed in the hope that it will be
useful, but WITHOUT ANY WARRANTY; without even the implied
warranty of MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.
See the GNU General Public License for more details.
</para>
<para>
You should have received a copy of the GNU General Public
License along with this program; if not, write to the Free
Software Foundation, Inc., 59 Temple Place, Suite 330, Boston,
MA 02111-1307 USA
</para>
<para>
For more details see the file COPYING in the source
distribution of Linux.
</para>
</legalnotice>
</bookinfo>
<toc></toc>
<chapter id="intro">
<title>Introduction</title>
<para>
The syncppp drivers in Linux provide a fairly complete
implementation of Cisco HDLC and a minimal implementation of
PPP. The longer term goal is to switch the PPP layer to the
generic PPP interface that is new in Linux 2.3.x. The API should
remain unchanged when this is done, but support will then be
available for IPX, compression and other PPP features
</para>
</chapter>
<chapter id="bugs">
<title>Known Bugs And Assumptions</title>
<para>
<variablelist>
<varlistentry><term>PPP is minimal</term>
<listitem>
<para>
The current PPP implementation is very basic, although sufficient
for most wan usages.
</para>
</listitem></varlistentry>
<varlistentry><term>Cisco HDLC Quirks</term>
<listitem>
<para>
Currently we do not end all packets with the correct Cisco multicast
or unicast flags. Nothing appears to mind too much but this should
be corrected.
</para>
</listitem></varlistentry>
</variablelist>
</para>
</chapter>
<chapter id="pubfunctions">
<title>Public Functions Provided</title>
!Edrivers/net/wan/syncppp.c
</chapter>
</book>
Documentation/networking/generic-hdlc.txt
View file @ c46920da
......@@ -3,15 +3,15 @@ Krzysztof Halasa <khc@pm.waw.pl>
Generic HDLC layer currently supports:
1. Frame Relay (ANSI, CCITT, Cisco and no LMI).
1. Frame Relay (ANSI, CCITT, Cisco and no LMI)
- Normal (routed) and Ethernet-bridged (Ethernet device emulation)
interfaces can share a single PVC.
- ARP support (no InARP support in the kernel - there is an
experimental InARP user-space daemon available on:
http://www.kernel.org/pub/linux/utils/net/hdlc/).
2. raw HDLC - either IP (IPv4) interface or Ethernet device emulation.
3. Cisco HDLC.
4. PPP (uses syncppp.c).
2. raw HDLC - either IP (IPv4) interface or Ethernet device emulation
3. Cisco HDLC
4. PPP
5. X.25 (uses X.25 routines).
Generic HDLC is a protocol driver only - it needs a low-level driver
......
drivers/net/wan/Makefile
View file @ c46920da
......@@ -14,7 +14,7 @@ obj-$(CONFIG_HDLC_RAW) += hdlc_raw.o
obj-$(CONFIG_HDLC_RAW_ETH) += hdlc_raw_eth.o
obj-$(CONFIG_HDLC_CISCO) += hdlc_cisco.o
obj-$(CONFIG_HDLC_FR) += hdlc_fr.o
obj-$(CONFIG_HDLC_PPP) += hdlc_ppp.o syncppp.o
obj-$(CONFIG_HDLC_PPP) += hdlc_ppp.o
obj-$(CONFIG_HDLC_X25) += hdlc_x25.o
pc300-y := pc300_drv.o
......
drivers/net/wan/c101.c
View file @ c46920da
......@@ -88,7 +88,7 @@ static card_t **new_card = &first_card;
/* EDA address register must be set in EDAL, EDAH order - 8 bit ISA bus */
#define sca_outw(value, reg, card) do { \
writeb(value & 0xFF, (card)->win0base + C101_SCA + (reg)); \
writeb((value >> 8 ) & 0xFF, (card)->win0base + C101_SCA + (reg+1));\
writeb((value >> 8 ) & 0xFF, (card)->win0base + C101_SCA + (reg + 1));\
} while(0)
#define port_to_card(port) (port)
......@@ -113,7 +113,7 @@ static inline void openwin(card_t *card, u8 page)
}
#include "hd6457x.c"
#include "hd64570.c"
static inline void set_carrier(port_t *port)
......@@ -381,7 +381,7 @@ static int __init c101_run(unsigned long irq, unsigned long winbase)
return result;
}
sca_init_sync_port(card); /* Set up C101 memory */
sca_init_port(card); /* Set up C101 memory */
set_carrier(card);
printk(KERN_INFO "%s: Moxa C101 on IRQ%u,"
......
drivers/net/wan/hd6457x.c → drivers/net/wan/hd64570.c
View file @ c46920da
/*
* Hitachi SCA HD64570 and HD64572 common driver for Linux
* Hitachi SCA HD64570 driver for Linux
*
* Copyright (C) 1998-2003 Krzysztof Halasa <khc@pm.waw.pl>
*
......@@ -7,9 +7,7 @@
* under the terms of version 2 of the GNU General Public License
* as published by the Free Software Foundation.
*
* Sources of information:
* Hitachi HD64570 SCA User's Manual
* Hitachi HD64572 SCA-II User's Manual
* Source of information: Hitachi HD64570 SCA User's Manual
*
* We use the following SCA memory map:
*
......@@ -26,33 +24,26 @@
* tx_ring_buffers * HDLC_MAX_MRU = logical channel #0 TX buffers (if used)
*/
#include <linux/module.h>
#include <linux/kernel.h>
#include <linux/slab.h>
#include <linux/jiffies.h>
#include <linux/types.h>
#include <linux/bitops.h>
#include <linux/errno.h>
#include <linux/fcntl.h>
#include <linux/interrupt.h>
#include <linux/hdlc.h>
#include <linux/in.h>
#include <linux/string.h>
#include <linux/errno.h>
#include <linux/init.h>
#include <linux/interrupt.h>
#include <linux/ioport.h>
#include <linux/bitops.h>
#include <asm/system.h>
#include <asm/uaccess.h>
#include <asm/io.h>
#include <linux/jiffies.h>
#include <linux/kernel.h>
#include <linux/module.h>
#include <linux/netdevice.h>
#include <linux/skbuff.h>
#include <linux/hdlc.h>
#if (!defined (__HD64570_H) && !defined (__HD64572_H)) || \
(defined (__HD64570_H) && defined (__HD64572_H))
#error Either hd64570.h or hd64572.h must be included
#endif
#include <linux/slab.h>
#include <linux/string.h>
#include <linux/types.h>
#include <asm/io.h>
#include <asm/system.h>
#include <asm/uaccess.h>
#include "hd64570.h"
#define get_msci(port) (phy_node(port) ? MSCI1_OFFSET : MSCI0_OFFSET)
#define get_dmac_rx(port) (phy_node(port) ? DMAC1RX_OFFSET : DMAC0RX_OFFSET)
......@@ -62,16 +53,6 @@
#define SCA_INTR_DMAC_RX(node) (node ? 0x20 : 0x02)
#define SCA_INTR_DMAC_TX(node) (node ? 0x40 : 0x04)
#ifdef __HD64570_H /* HD64570 */
#define sca_outa(value, reg, card) sca_outw(value, reg, card)
#define sca_ina(reg, card) sca_inw(reg, card)
#define writea(value, ptr) writew(value, ptr)
#else /* HD64572 */
#define sca_outa(value, reg, card) sca_outl(value, reg, card)
#define sca_ina(reg, card) sca_inl(reg, card)
#define writea(value, ptr) writel(value, ptr)
#endif
static inline struct net_device *port_to_dev(port_t *port)
{
......@@ -81,8 +62,6 @@ static inline struct net_device *port_to_dev(port_t *port)
static inline int sca_intr_status(card_t *card)
{
u8 result = 0;
#ifdef __HD64570_H /* HD64570 */
u8 isr0 = sca_in(ISR0, card);
u8 isr1 = sca_in(ISR1, card);
......@@ -93,18 +72,6 @@ static inline int sca_intr_status(card_t *card)
if (isr0 & 0x0F) result |= SCA_INTR_MSCI(0);
if (isr0 & 0xF0) result |= SCA_INTR_MSCI(1);
#else /* HD64572 */
u32 isr0 = sca_inl(ISR0, card);
if (isr0 & 0x0000000F) result |= SCA_INTR_DMAC_RX(0);
if (isr0 & 0x000000F0) result |= SCA_INTR_DMAC_TX(0);
if (isr0 & 0x00000F00) result |= SCA_INTR_DMAC_RX(1);
if (isr0 & 0x0000F000) result |= SCA_INTR_DMAC_TX(1);
if (isr0 & 0x003E0000) result |= SCA_INTR_MSCI(0);
if (isr0 & 0x3E000000) result |= SCA_INTR_MSCI(1);
#endif /* HD64570 vs HD64572 */
if (!(result & SCA_INTR_DMAC_TX(0)))
if (sca_in(DSR_TX(0), card) & DSR_EOM)
result |= SCA_INTR_DMAC_TX(0);
......@@ -127,7 +94,6 @@ static inline u16 next_desc(port_t *port, u16 desc, int transmit)
}
static inline u16 desc_abs_number(port_t *port, u16 desc, int transmit)
{
u16 rx_buffs = port_to_card(port)->rx_ring_buffers;
......@@ -139,28 +105,26 @@ static inline u16 desc_abs_number(port_t *port, u16 desc, int transmit)
}
static inline u16 desc_offset(port_t *port, u16 desc, int transmit)
{
/* Descriptor offset always fits in 16 bytes */
/* Descriptor offset always fits in 16 bits */
return desc_abs_number(port, desc, transmit) * sizeof(pkt_desc);
}
static inline pkt_desc __iomem *desc_address(port_t *port, u16 desc, int transmit)
static inline pkt_desc __iomem *desc_address(port_t *port, u16 desc,
int transmit)
{
#ifdef PAGE0_ALWAYS_MAPPED
return (pkt_desc __iomem *)(win0base(port_to_card(port))
+ desc_offset(port, desc, transmit));
+ desc_offset(port, desc, transmit));
#else
return (pkt_desc __iomem *)(winbase(port_to_card(port))
+ desc_offset(port, desc, transmit));
+ desc_offset(port, desc, transmit));
#endif
}
static inline u32 buffer_offset(port_t *port, u16 desc, int transmit)
{
return port_to_card(port)->buff_offset +
......@@ -186,7 +150,7 @@ static inline void sca_set_carrier(port_t *port)
}
static void sca_init_sync_port(port_t *port)
static void sca_init_port(port_t *port)
{
card_t *card = port_to_card(port);
int transmit, i;
......@@ -195,7 +159,7 @@ static void sca_init_sync_port(port_t *port)
port->txin = 0;
port->txlast = 0;
#if !defined(PAGE0_ALWAYS_MAPPED) && !defined(ALL_PAGES_ALWAYS_MAPPED)
#ifndef PAGE0_ALWAYS_MAPPED
openwin(card, 0);
#endif
......@@ -209,7 +173,7 @@ static void sca_init_sync_port(port_t *port)
u16 chain_off = desc_offset(port, i + 1, transmit);
u32 buff_off = buffer_offset(port, i, transmit);
writea(chain_off, &desc->cp);
writew(chain_off, &desc->cp);
writel(buff_off, &desc->bp);
writew(0, &desc->len);
writeb(0, &desc->stat);
......@@ -222,16 +186,14 @@ static void sca_init_sync_port(port_t *port)
sca_out(DCR_ABORT, transmit ? DCR_TX(phy_node(port)) :
DCR_RX(phy_node(port)), card);
#ifdef __HD64570_H
sca_out(0, dmac + CPB, card); /* pointer base */
#endif
/* current desc addr */
sca_outa(desc_offset(port, 0, transmit), dmac + CDAL, card);
sca_out(0, dmac + CPB, card); /* pointer base */
sca_outw(desc_offset(port, 0, transmit), dmac + CDAL, card);
if (!transmit)
sca_outa(desc_offset(port, buffs - 1, transmit),
sca_outw(desc_offset(port, buffs - 1, transmit),
dmac + EDAL, card);
else
sca_outa(desc_offset(port, 0, transmit), dmac + EDAL,
sca_outw(desc_offset(port, 0, transmit), dmac + EDAL,
card);
/* clear frame end interrupt counter */
......@@ -258,7 +220,6 @@ static void sca_init_sync_port(port_t *port)
}
#ifdef NEED_SCA_MSCI_INTR
/* MSCI interrupt service */
static inline void sca_msci_intr(port_t *port)
......@@ -282,17 +243,15 @@ static inline void sca_msci_intr(port_t *port)
#endif
static inline void sca_rx(card_t *card, port_t *port, pkt_desc __iomem *desc, u16 rxin)
static inline void sca_rx(card_t *card, port_t *port, pkt_desc __iomem *desc,
u16 rxin)
{
struct net_device *dev = port_to_dev(port);
struct sk_buff *skb;
u16 len;
u32 buff;
#ifndef ALL_PAGES_ALWAYS_MAPPED
u32 maxlen;
u8 page;
#endif
len = readw(&desc->len);
skb = dev_alloc_skb(len);
......@@ -302,7 +261,6 @@ static inline void sca_rx(card_t *card, port_t *port, pkt_desc __iomem *desc, u1
}
buff = buffer_offset(port, rxin, 0);
#ifndef ALL_PAGES_ALWAYS_MAPPED
page = buff / winsize(card);
buff = buff % winsize(card);
maxlen = winsize(card) - buff;
......@@ -314,12 +272,10 @@ static inline void sca_rx(card_t *card, port_t *port, pkt_desc __iomem *desc, u1
openwin(card, page + 1);
memcpy_fromio(skb->data + maxlen, winbase(card), len - maxlen);
} else
#endif
memcpy_fromio(skb->data, winbase(card) + buff, len);
memcpy_fromio(skb->data, winbase(card) + buff, len);
#if !defined(PAGE0_ALWAYS_MAPPED) && !defined(ALL_PAGES_ALWAYS_MAPPED)
/* select pkt_desc table page back */
openwin(card, 0);
#ifndef PAGE0_ALWAYS_MAPPED
openwin(card, 0); /* select pkt_desc table page back */
#endif
skb_put(skb, len);
#ifdef DEBUG_PKT
......@@ -333,7 +289,6 @@ static inline void sca_rx(card_t *card, port_t *port, pkt_desc __iomem *desc, u1
}
/* Receive DMA interrupt service */
static inline void sca_rx_intr(port_t *port)
{
......@@ -353,7 +308,7 @@ static inline void sca_rx_intr(port_t *port)
while (1) {
u32 desc_off = desc_offset(port, port->rxin, 0);
pkt_desc __iomem *desc;
u32 cda = sca_ina(dmac + CDAL, card);
u32 cda = sca_inw(dmac + CDAL, card);
if ((cda >= desc_off) && (cda < desc_off + sizeof(pkt_desc)))
break; /* No frame received */
......@@ -377,7 +332,7 @@ static inline void sca_rx_intr(port_t *port)
sca_rx(card, port, desc, port->rxin);
/* Set new error descriptor address */
sca_outa(desc_off, dmac + EDAL, card);
sca_outw(desc_off, dmac + EDAL, card);
port->rxin = next_desc(port, port->rxin, 0);
}
......@@ -386,7 +341,6 @@ static inline void sca_rx_intr(port_t *port)
}
/* Transmit DMA interrupt service */
static inline void sca_tx_intr(port_t *port)
{
......@@ -407,7 +361,7 @@ static inline void sca_tx_intr(port_t *port)
pkt_desc __iomem *desc;
u32 desc_off = desc_offset(port, port->txlast, 1);
u32 cda = sca_ina(dmac + CDAL, card);
u32 cda = sca_inw(dmac + CDAL, card);
if ((cda >= desc_off) && (cda < desc_off + sizeof(pkt_desc)))
break; /* Transmitter is/will_be sending this frame */
......@@ -423,17 +377,13 @@ static inline void sca_tx_intr(port_t *port)
}
static irqreturn_t sca_intr(int irq, void* dev_id)
{
card_t *card = dev_id;
int i;
u8 stat;
int handled = 0;
#ifndef ALL_PAGES_ALWAYS_MAPPED
u8 page = sca_get_page(card);
#endif
while((stat = sca_intr_status(card)) != 0) {
handled = 1;
......@@ -452,14 +402,11 @@ static irqreturn_t sca_intr(int irq, void* dev_id)
}
}
#ifndef ALL_PAGES_ALWAYS_MAPPED
openwin(card, page); /* Restore original page */
#endif
return IRQ_RETVAL(handled);
}
static void sca_set_port(port_t *port)
{
card_t* card = port_to_card(port);
......@@ -497,12 +444,7 @@ static void sca_set_port(port_t *port)
port->tmc = tmc;
/* baud divisor - time constant*/
#ifdef __HD64570_H
sca_out(port->tmc, msci + TMC, card);
#else
sca_out(port->tmc, msci + TMCR, card);
sca_out(port->tmc, msci + TMCT, card);
#endif
/* Set BRG bits */
sca_out(port->rxs, msci + RXS, card);
......@@ -518,7 +460,6 @@ static void sca_set_port(port_t *port)
}
static void sca_open(struct net_device *dev)
{
port_t *port = dev_to_port(dev);
......@@ -540,11 +481,7 @@ static void sca_open(struct net_device *dev)
switch(port->parity) {
case PARITY_CRC16_PR0: md0 = MD0_HDLC | MD0_CRC_16_0; break;
case PARITY_CRC16_PR1: md0 = MD0_HDLC | MD0_CRC_16; break;
#ifdef __HD64570_H
case PARITY_CRC16_PR0_CCITT: md0 = MD0_HDLC | MD0_CRC_ITU_0; break;
#else
case PARITY_CRC32_PR1_CCITT: md0 = MD0_HDLC | MD0_CRC_ITU32; break;
#endif
case PARITY_CRC16_PR1_CCITT: md0 = MD0_HDLC | MD0_CRC_ITU; break;
default: md0 = MD0_HDLC | MD0_CRC_NONE;
}
......@@ -554,35 +491,20 @@ static void sca_open(struct net_device *dev)
sca_out(0x00, msci + MD1, card); /* no address field check */
sca_out(md2, msci + MD2, card);
sca_out(0x7E, msci + IDL, card); /* flag character 0x7E */
#ifdef __HD64570_H
sca_out(CTL_IDLE, msci + CTL, card);
#else
/* Skip the rest of underrun frame */
sca_out(CTL_IDLE | CTL_URCT | CTL_URSKP, msci + CTL, card);
#endif
#ifdef __HD64570_H
/* Allow at least 8 bytes before requesting RX DMA operation */
/* TX with higher priority and possibly with shorter transfers */
sca_out(0x07, msci + RRC, card); /* +1=RXRDY/DMA activation condition*/
sca_out(0x10, msci + TRC0, card); /* = TXRDY/DMA activation condition*/
sca_out(0x14, msci + TRC1, card); /* +1=TXRDY/DMA deactiv condition */
#else
sca_out(0x0F, msci + RNR, card); /* +1=RX DMA activation condition */
sca_out(0x3C, msci + TFS, card); /* +1 = TX start */
sca_out(0x38, msci + TCR, card); /* =Critical TX DMA activ condition */
sca_out(0x38, msci + TNR0, card); /* =TX DMA activation condition */
sca_out(0x3F, msci + TNR1, card); /* +1=TX DMA deactivation condition*/
#endif
/* We're using the following interrupts:
- TXINT (DMAC completed all transmisions, underrun or DCD change)
- all DMA interrupts
*/
sca_set_carrier(port);
#ifdef __HD64570_H
/* MSCI TX INT and RX INT A IRQ enable */
sca_out(IE0_TXINT | IE0_RXINTA, msci + IE0, card);
sca_out(IE1_UDRN | IE1_CDCD, msci + IE1, card);
......@@ -591,21 +513,8 @@ static void sca_open(struct net_device *dev)
/* enable DMA IRQ */
sca_out(sca_in(IER1, card) | (phy_node(port) ? 0xF0 : 0x0F),
IER1, card);
#else
/* MSCI TXINT and RXINTA interrupt enable */
sca_outl(IE0_TXINT | IE0_RXINTA | IE0_UDRN | IE0_CDCD, msci + IE0,
card);
/* DMA & MSCI IRQ enable */
sca_outl(sca_inl(IER0, card) |
(phy_node(port) ? 0x0A006600 : 0x000A0066), IER0, card);
#endif
#ifdef __HD64570_H
sca_out(port->tmc, msci + TMC, card); /* Restore registers */
#else
sca_out(port->tmc, msci + TMCR, card);
sca_out(port->tmc, msci + TMCT, card);
#endif
sca_out(port->rxs, msci + RXS, card);
sca_out(port->txs, msci + TXS, card);
sca_out(CMD_TX_ENABLE, msci + CMD, card);
......@@ -615,7 +524,6 @@ static void sca_open(struct net_device *dev)
}
static void sca_close(struct net_device *dev)
{
port_t *port = dev_to_port(dev);
......@@ -623,23 +531,17 @@ static void sca_close(struct net_device *dev)
/* reset channel */
sca_out(CMD_RESET, get_msci(port) + CMD, port_to_card(port));
#ifdef __HD64570_H
/* disable MSCI interrupts */
sca_out(sca_in(IER0, card) & (phy_node(port) ? 0x0F : 0xF0),
IER0, card);
/* disable DMA interrupts */
sca_out(sca_in(IER1, card) & (phy_node(port) ? 0x0F : 0xF0),
IER1, card);
#else
/* disable DMA & MSCI IRQ */
sca_outl(sca_inl(IER0, card) &
(phy_node(port) ? 0x00FF00FF : 0xFF00FF00), IER0, card);
#endif
netif_stop_queue(dev);
}
static int sca_attach(struct net_device *dev, unsigned short encoding,
unsigned short parity)
{
......@@ -653,11 +555,7 @@ static int sca_attach(struct net_device *dev, unsigned short encoding,
if (parity != PARITY_NONE &&
parity != PARITY_CRC16_PR0 &&
parity != PARITY_CRC16_PR1 &&
#ifdef __HD64570_H
parity != PARITY_CRC16_PR0_CCITT &&
#else
parity != PARITY_CRC32_PR1_CCITT &&
#endif
parity != PARITY_CRC16_PR1_CCITT)
return -EINVAL;
......@@ -667,34 +565,30 @@ static int sca_attach(struct net_device *dev, unsigned short encoding,
}
#ifdef DEBUG_RINGS
static void sca_dump_rings(struct net_device *dev)
{
port_t *port = dev_to_port(dev);
card_t *card = port_to_card(port);
u16 cnt;
#if !defined(PAGE0_ALWAYS_MAPPED) && !defined(ALL_PAGES_ALWAYS_MAPPED)
u8 page;
#endif
#ifndef PAGE0_ALWAYS_MAPPED
u8 page = sca_get_page(card);
#if !defined(PAGE0_ALWAYS_MAPPED) && !defined(ALL_PAGES_ALWAYS_MAPPED)
page = sca_get_page(card);
openwin(card, 0);
#endif
printk(KERN_DEBUG "RX ring: CDA=%u EDA=%u DSR=%02X in=%u %sactive",
sca_ina(get_dmac_rx(port) + CDAL, card),
sca_ina(get_dmac_rx(port) + EDAL, card),
sca_inw(get_dmac_rx(port) + CDAL, card),
sca_inw(get_dmac_rx(port) + EDAL, card),
sca_in(DSR_RX(phy_node(port)), card), port->rxin,
sca_in(DSR_RX(phy_node(port)), card) & DSR_DE?"":"in");
sca_in(DSR_RX(phy_node(port)), card) & DSR_DE ? "" : "in");
for (cnt = 0; cnt < port_to_card(port)->rx_ring_buffers; cnt++)
printk(" %02X", readb(&(desc_address(port, cnt, 0)->stat)));
printk("\n" KERN_DEBUG "TX ring: CDA=%u EDA=%u DSR=%02X in=%u "
"last=%u %sactive",
sca_ina(get_dmac_tx(port) + CDAL, card),
sca_ina(get_dmac_tx(port) + EDAL, card),
sca_inw(get_dmac_tx(port) + CDAL, card),
sca_inw(get_dmac_tx(port) + EDAL, card),
sca_in(DSR_TX(phy_node(port)), card), port->txin, port->txlast,
sca_in(DSR_TX(phy_node(port)), card) & DSR_DE ? "" : "in");
......@@ -702,12 +596,8 @@ static void sca_dump_rings(struct net_device *dev)
printk(" %02X", readb(&(desc_address(port, cnt, 1)->stat)));
printk("\n");
printk(KERN_DEBUG "MSCI: MD: %02x %02x %02x, "
"ST: %02x %02x %02x %02x"
#ifdef __HD64572_H
" %02x"
#endif
", FST: %02x CST: %02x %02x\n",
printk(KERN_DEBUG "MSCI: MD: %02x %02x %02x, ST: %02x %02x %02x %02x,"
" FST: %02x CST: %02x %02x\n",
sca_in(get_msci(port) + MD0, card),
sca_in(get_msci(port) + MD1, card),
sca_in(get_msci(port) + MD2, card),
......@@ -715,52 +605,33 @@ static void sca_dump_rings(struct net_device *dev)
sca_in(get_msci(port) + ST1, card),
sca_in(get_msci(port) + ST2, card),
sca_in(get_msci(port) + ST3, card),
#ifdef __HD64572_H
sca_in(get_msci(port) + ST4, card),
#endif
sca_in(get_msci(port) + FST, card),
sca_in(get_msci(port) + CST0, card),
sca_in(get_msci(port) + CST1, card));
#ifdef __HD64572_H
printk(KERN_DEBUG "ILAR: %02x ISR: %08x %08x\n", sca_in(ILAR, card),
sca_inl(ISR0, card), sca_inl(ISR1, card));
#else
printk(KERN_DEBUG "ISR: %02x %02x %02x\n", sca_in(ISR0, card),
sca_in(ISR1, card), sca_in(ISR2, card));
#endif
#if !defined(PAGE0_ALWAYS_MAPPED) && !defined(ALL_PAGES_ALWAYS_MAPPED)
#ifndef PAGE0_ALWAYS_MAPPED
openwin(card, page); /* Restore original page */
#endif
}
#endif /* DEBUG_RINGS */
static int sca_xmit(struct sk_buff *skb, struct net_device *dev)
{
port_t *port = dev_to_port(dev);
card_t *card = port_to_card(port);
pkt_desc __iomem *desc;
u32 buff, len;
#ifndef ALL_PAGES_ALWAYS_MAPPED
u8 page;
u32 maxlen;
#endif
spin_lock_irq(&port->lock);
desc = desc_address(port, port->txin + 1, 1);
if (readb(&desc->stat)) { /* allow 1 packet gap */
/* should never happen - previous xmit should stop queue */
#ifdef DEBUG_PKT
printk(KERN_DEBUG "%s: transmitter buffer full\n", dev->name);
#endif
netif_stop_queue(dev);
spin_unlock_irq(&port->lock);
return 1; /* request packet to be queued */
}
BUG_ON(readb(&desc->stat)); /* previous xmit should stop queue */
#ifdef DEBUG_PKT
printk(KERN_DEBUG "%s TX(%i):", dev->name, skb->len);
......@@ -770,7 +641,6 @@ static int sca_xmit(struct sk_buff *skb, struct net_device *dev)
desc = desc_address(port, port->txin, 1);
buff = buffer_offset(port, port->txin, 1);
len = skb->len;
#ifndef ALL_PAGES_ALWAYS_MAPPED
page = buff / winsize(card);
buff = buff % winsize(card);
maxlen = winsize(card) - buff;
......@@ -780,12 +650,10 @@ static int sca_xmit(struct sk_buff *skb, struct net_device *dev)
memcpy_toio(winbase(card) + buff, skb->data, maxlen);
openwin(card, page + 1);
memcpy_toio(winbase(card), skb->data + maxlen, len - maxlen);
}
else
#endif
} else
memcpy_toio(winbase(card) + buff, skb->data, len);
#if !defined(PAGE0_ALWAYS_MAPPED) && !defined(ALL_PAGES_ALWAYS_MAPPED)
#ifndef PAGE0_ALWAYS_MAPPED
openwin(card, 0); /* select pkt_desc table page back */
#endif
writew(len, &desc->len);
......@@ -793,7 +661,7 @@ static int sca_xmit(struct sk_buff *skb, struct net_device *dev)
dev->trans_start = jiffies;
port->txin = next_desc(port, port->txin, 1);
sca_outa(desc_offset(port, port->txin, 1),
sca_outw(desc_offset(port, port->txin, 1),
get_dmac_tx(port) + EDAL, card);
sca_out(DSR_DE, DSR_TX(phy_node(port)), card); /* Enable TX DMA */
......@@ -809,40 +677,29 @@ static int sca_xmit(struct sk_buff *skb, struct net_device *dev)
}
#ifdef NEED_DETECT_RAM
static u32 __devinit sca_detect_ram(card_t *card, u8 __iomem *rambase, u32 ramsize)
static u32 __devinit sca_detect_ram(card_t *card, u8 __iomem *rambase,
u32 ramsize)
{
/* Round RAM size to 32 bits, fill from end to start */
u32 i = ramsize &= ~3;
#ifndef ALL_PAGES_ALWAYS_MAPPED
u32 size = winsize(card);
openwin(card, (i - 4) / size); /* select last window */
#endif
do {
i -= 4;
#ifndef ALL_PAGES_ALWAYS_MAPPED
if ((i + 4) % size == 0)
openwin(card, i / size);
writel(i ^ 0x12345678, rambase + i % size);
#else
writel(i ^ 0x12345678, rambase + i);
#endif
}while (i > 0);
} while (i > 0);
for (i = 0; i < ramsize ; i += 4) {
#ifndef ALL_PAGES_ALWAYS_MAPPED
if (i % size == 0)
openwin(card, i / size);
if (readl(rambase + i % size) != (i ^ 0x12345678))
break;
#else
if (readl(rambase + i) != (i ^ 0x12345678))
break;
#endif
}
return i;
......@@ -850,7 +707,6 @@ static u32 __devinit sca_detect_ram(card_t *card, u8 __iomem *rambase, u32 ramsi
#endif /* NEED_DETECT_RAM */
static void __devinit sca_init(card_t *card, int wait_states)
{
sca_out(wait_states, WCRL, card); /* Wait Control */
......
drivers/net/wan/hd64572.c 0 → 100644
View file @ c46920da
/*
* Hitachi (now Renesas) SCA-II HD64572 driver for Linux
*
* Copyright (C) 1998-2008 Krzysztof Halasa <khc@pm.waw.pl>
*
* This program is free software; you can redistribute it and/or modify it
* under the terms of version 2 of the GNU General Public License
* as published by the Free Software Foundation.
*
* Source of information: HD64572 SCA-II User's Manual
*
* We use the following SCA memory map:
*
* Packet buffer descriptor rings - starting from card->rambase:
* rx_ring_buffers * sizeof(pkt_desc) = logical channel #0 RX ring
* tx_ring_buffers * sizeof(pkt_desc) = logical channel #0 TX ring
* rx_ring_buffers * sizeof(pkt_desc) = logical channel #1 RX ring (if used)
* tx_ring_buffers * sizeof(pkt_desc) = logical channel #1 TX ring (if used)
*
* Packet data buffers - starting from card->rambase + buff_offset:
* rx_ring_buffers * HDLC_MAX_MRU = logical channel #0 RX buffers
* tx_ring_buffers * HDLC_MAX_MRU = logical channel #0 TX buffers
* rx_ring_buffers * HDLC_MAX_MRU = logical channel #0 RX buffers (if used)
* tx_ring_buffers * HDLC_MAX_MRU = logical channel #0 TX buffers (if used)
*/
#include <linux/bitops.h>
#include <linux/errno.h>
#include <linux/fcntl.h>
#include <linux/hdlc.h>
#include <linux/in.h>
#include <linux/init.h>
#include <linux/interrupt.h>
#include <linux/ioport.h>
#include <linux/jiffies.h>
#include <linux/kernel.h>
#include <linux/module.h>
#include <linux/netdevice.h>
#include <linux/skbuff.h>
#include <linux/slab.h>
#include <linux/string.h>
#include <linux/types.h>
#include <asm/io.h>
#include <asm/system.h>
#include <asm/uaccess.h>
#include "hd64572.h"
#define NAPI_WEIGHT 16
#define get_msci(port) (port->chan ? MSCI1_OFFSET : MSCI0_OFFSET)
#define get_dmac_rx(port) (port->chan ? DMAC1RX_OFFSET : DMAC0RX_OFFSET)
#define get_dmac_tx(port) (port->chan ? DMAC1TX_OFFSET : DMAC0TX_OFFSET)
#define sca_in(reg, card) readb(card->scabase + (reg))
#define sca_out(value, reg, card) writeb(value, card->scabase + (reg))
#define sca_inw(reg, card) readw(card->scabase + (reg))
#define sca_outw(value, reg, card) writew(value, card->scabase + (reg))
#define sca_inl(reg, card) readl(card->scabase + (reg))
#define sca_outl(value, reg, card) writel(value, card->scabase + (reg))
static int sca_poll(struct napi_struct *napi, int budget);
static inline port_t* dev_to_port(struct net_device *dev)
{
return dev_to_hdlc(dev)->priv;
}
static inline void enable_intr(port_t *port)
{
/* enable DMIB and MSCI RXINTA interrupts */
sca_outl(sca_inl(IER0, port->card) |
(port->chan ? 0x08002200 : 0x00080022), IER0, port->card);
}
static inline void disable_intr(port_t *port)
{
sca_outl(sca_inl(IER0, port->card) &
(port->chan ? 0x00FF00FF : 0xFF00FF00), IER0, port->card);
}
static inline u16 desc_abs_number(port_t *port, u16 desc, int transmit)
{
u16 rx_buffs = port->card->rx_ring_buffers;
u16 tx_buffs = port->card->tx_ring_buffers;
desc %= (transmit ? tx_buffs : rx_buffs); // called with "X + 1" etc.
return port->chan * (rx_buffs + tx_buffs) + transmit * rx_buffs + desc;
}
static inline u16 desc_offset(port_t *port, u16 desc, int transmit)
{
/* Descriptor offset always fits in 16 bits */
return desc_abs_number(port, desc, transmit) * sizeof(pkt_desc);
}
static inline pkt_desc __iomem *desc_address(port_t *port, u16 desc,
int transmit)
{
return (pkt_desc __iomem *)(port->card->rambase +
desc_offset(port, desc, transmit));
}
static inline u32 buffer_offset(port_t *port, u16 desc, int transmit)
{
return port->card->buff_offset +
desc_abs_number(port, desc, transmit) * (u32)HDLC_MAX_MRU;
}
static inline void sca_set_carrier(port_t *port)
{
if (!(sca_in(get_msci(port) + ST3, port->card) & ST3_DCD)) {
#ifdef DEBUG_LINK
printk(KERN_DEBUG "%s: sca_set_carrier on\n",
port->netdev.name);
#endif
netif_carrier_on(port->netdev);
} else {
#ifdef DEBUG_LINK
printk(KERN_DEBUG "%s: sca_set_carrier off\n",
port->netdev.name);
#endif
netif_carrier_off(port->netdev);
}
}
static void sca_init_port(port_t *port)
{
card_t *card = port->card;
u16 dmac_rx = get_dmac_rx(port), dmac_tx = get_dmac_tx(port);
int transmit, i;
port->rxin = 0;
port->txin = 0;
port->txlast = 0;
for (transmit = 0; transmit < 2; transmit++) {
u16 buffs = transmit ? card->tx_ring_buffers
: card->rx_ring_buffers;
for (i = 0; i < buffs; i++) {
pkt_desc __iomem *desc = desc_address(port, i, transmit);
u16 chain_off = desc_offset(port, i + 1, transmit);
u32 buff_off = buffer_offset(port, i, transmit);
writel(chain_off, &desc->cp);
writel(buff_off, &desc->bp);
writew(0, &desc->len);
writeb(0, &desc->stat);
}
}
/* DMA disable - to halt state */
sca_out(0, DSR_RX(port->chan), card);
sca_out(0, DSR_TX(port->chan), card);
/* software ABORT - to initial state */
sca_out(DCR_ABORT, DCR_RX(port->chan), card);
sca_out(DCR_ABORT, DCR_TX(port->chan), card);
/* current desc addr */
sca_outl(desc_offset(port, 0, 0), dmac_rx + CDAL, card);
sca_outl(desc_offset(port, card->tx_ring_buffers - 1, 0),
dmac_rx + EDAL, card);
sca_outl(desc_offset(port, 0, 1), dmac_tx + CDAL, card);
sca_outl(desc_offset(port, 0, 1), dmac_tx + EDAL, card);
/* clear frame end interrupt counter */
sca_out(DCR_CLEAR_EOF, DCR_RX(port->chan), card);
sca_out(DCR_CLEAR_EOF, DCR_TX(port->chan), card);
/* Receive */
sca_outw(HDLC_MAX_MRU, dmac_rx + BFLL, card); /* set buffer length */
sca_out(0x14, DMR_RX(port->chan), card); /* Chain mode, Multi-frame */
sca_out(DIR_EOME, DIR_RX(port->chan), card); /* enable interrupts */
sca_out(DSR_DE, DSR_RX(port->chan), card); /* DMA enable */
/* Transmit */
sca_out(0x14, DMR_TX(port->chan), card); /* Chain mode, Multi-frame */
sca_out(DIR_EOME, DIR_TX(port->chan), card); /* enable interrupts */
sca_set_carrier(port);
netif_napi_add(port->netdev, &port->napi, sca_poll, NAPI_WEIGHT);
}
/* MSCI interrupt service */
static inline void sca_msci_intr(port_t *port)
{
u16 msci = get_msci(port);
card_t* card = port->card;
if (sca_in(msci + ST1, card) & ST1_CDCD) {
/* Reset MSCI CDCD status bit */
sca_out(ST1_CDCD, msci + ST1, card);
sca_set_carrier(port);
}
}
static inline void sca_rx(card_t *card, port_t *port, pkt_desc __iomem *desc,
u16 rxin)
{
struct net_device *dev = port->netdev;
struct sk_buff *skb;
u16 len;
u32 buff;
len = readw(&desc->len);
skb = dev_alloc_skb(len);
if (!skb) {
dev->stats.rx_dropped++;
return;
}
buff = buffer_offset(port, rxin, 0);
memcpy_fromio(skb->data, card->rambase + buff, len);
skb_put(skb, len);
#ifdef DEBUG_PKT
printk(KERN_DEBUG "%s RX(%i):", dev->name, skb->len);
debug_frame(skb);
#endif
dev->stats.rx_packets++;
dev->stats.rx_bytes += skb->len;
skb->protocol = hdlc_type_trans(skb, dev);
netif_receive_skb(skb);
}
/* Receive DMA service */
static inline int sca_rx_done(port_t *port, int budget)
{
struct net_device *dev = port->netdev;
u16 dmac = get_dmac_rx(port);
card_t *card = port->card;
u8 stat = sca_in(DSR_RX(port->chan), card); /* read DMA Status */
int received = 0;
/* Reset DSR status bits */
sca_out((stat & (DSR_EOT | DSR_EOM | DSR_BOF | DSR_COF)) | DSR_DWE,
DSR_RX(port->chan), card);
if (stat & DSR_BOF)
/* Dropped one or more frames */
dev->stats.rx_over_errors++;
while (received < budget) {
u32 desc_off = desc_offset(port, port->rxin, 0);
pkt_desc __iomem *desc;
u32 cda = sca_inl(dmac + CDAL, card);
if ((cda >= desc_off) && (cda < desc_off + sizeof(pkt_desc)))
break; /* No frame received */
desc = desc_address(port, port->rxin, 0);
stat = readb(&desc->stat);
if (!(stat & ST_RX_EOM))
port->rxpart = 1; /* partial frame received */
else if ((stat & ST_ERROR_MASK) || port->rxpart) {
dev->stats.rx_errors++;
if (stat & ST_RX_OVERRUN)
dev->stats.rx_fifo_errors++;
else if ((stat & (ST_RX_SHORT | ST_RX_ABORT |
ST_RX_RESBIT)) || port->rxpart)
dev->stats.rx_frame_errors++;
else if (stat & ST_RX_CRC)
dev->stats.rx_crc_errors++;
if (stat & ST_RX_EOM)
port->rxpart = 0; /* received last fragment */
} else {
sca_rx(card, port, desc, port->rxin);
received++;
}
/* Set new error descriptor address */
sca_outl(desc_off, dmac + EDAL, card);
port->rxin = (port->rxin + 1) % card->rx_ring_buffers;
}
/* make sure RX DMA is enabled */
sca_out(DSR_DE, DSR_RX(port->chan), card);
return received;
}
/* Transmit DMA service */
static inline void sca_tx_done(port_t *port)
{
struct net_device *dev = port->netdev;
card_t* card = port->card;
u8 stat;
spin_lock(&port->lock);
stat = sca_in(DSR_TX(port->chan), card); /* read DMA Status */
/* Reset DSR status bits */
sca_out((stat & (DSR_EOT | DSR_EOM | DSR_BOF | DSR_COF)) | DSR_DWE,
DSR_TX(port->chan), card);
while (1) {
pkt_desc __iomem *desc = desc_address(port, port->txlast, 1);
u8 stat = readb(&desc->stat);
if (!(stat & ST_TX_OWNRSHP))
break; /* not yet transmitted */
if (stat & ST_TX_UNDRRUN) {
dev->stats.tx_errors++;
dev->stats.tx_fifo_errors++;
} else {
dev->stats.tx_packets++;
dev->stats.tx_bytes += readw(&desc->len);
}
writeb(0, &desc->stat); /* Free descriptor */
port->txlast = (port->txlast + 1) % card->tx_ring_buffers;
}
netif_wake_queue(dev);
spin_unlock(&port->lock);
}
static int sca_poll(struct napi_struct *napi, int budget)
{
port_t *port = container_of(napi, port_t, napi);
u32 isr0 = sca_inl(ISR0, port->card);
int received = 0;
if (isr0 & (port->chan ? 0x08000000 : 0x00080000))
sca_msci_intr(port);
if (isr0 & (port->chan ? 0x00002000 : 0x00000020))
sca_tx_done(port);
if (isr0 & (port->chan ? 0x00000200 : 0x00000002))
received = sca_rx_done(port, budget);
if (received < budget) {
netif_rx_complete(port->netdev, napi);
enable_intr(port);
}
return received;
}
static irqreturn_t sca_intr(int irq, void *dev_id)
{
card_t *card = dev_id;
u32 isr0 = sca_inl(ISR0, card);
int i, handled = 0;
for (i = 0; i < 2; i++) {
port_t *port = get_port(card, i);
if (port && (isr0 & (i ? 0x08002200 : 0x00080022))) {
handled = 1;
disable_intr(port);
netif_rx_schedule(port->netdev, &port->napi);
}
}
return IRQ_RETVAL(handled);
}
static void sca_set_port(port_t *port)
{
card_t* card = port->card;
u16 msci = get_msci(port);
u8 md2 = sca_in(msci + MD2, card);
unsigned int tmc, br = 10, brv = 1024;
if (port->settings.clock_rate > 0) {
/* Try lower br for better accuracy*/
do {
br--;
brv >>= 1; /* brv = 2^9 = 512 max in specs */
/* Baud Rate = CLOCK_BASE / TMC / 2^BR */
tmc = CLOCK_BASE / brv / port->settings.clock_rate;
}while (br > 1 && tmc <= 128);
if (tmc < 1) {
tmc = 1;
br = 0; /* For baud=CLOCK_BASE we use tmc=1 br=0 */
brv = 1;
} else if (tmc > 255)
tmc = 256; /* tmc=0 means 256 - low baud rates */
port->settings.clock_rate = CLOCK_BASE / brv / tmc;
} else {
br = 9; /* Minimum clock rate */
tmc = 256; /* 8bit = 0 */
port->settings.clock_rate = CLOCK_BASE / (256 * 512);
}
port->rxs = (port->rxs & ~CLK_BRG_MASK) | br;
port->txs = (port->txs & ~CLK_BRG_MASK) | br;
port->tmc = tmc;
/* baud divisor - time constant*/
sca_out(port->tmc, msci + TMCR, card);
sca_out(port->tmc, msci + TMCT, card);
/* Set BRG bits */
sca_out(port->rxs, msci + RXS, card);
sca_out(port->txs, msci + TXS, card);
if (port->settings.loopback)
md2 |= MD2_LOOPBACK;
else
md2 &= ~MD2_LOOPBACK;
sca_out(md2, msci + MD2, card);
}
static void sca_open(struct net_device *dev)
{
port_t *port = dev_to_port(dev);
card_t* card = port->card;
u16 msci = get_msci(port);
u8 md0, md2;
switch(port->encoding) {
case ENCODING_NRZ: md2 = MD2_NRZ; break;
case ENCODING_NRZI: md2 = MD2_NRZI; break;
case ENCODING_FM_MARK: md2 = MD2_FM_MARK; break;
case ENCODING_FM_SPACE: md2 = MD2_FM_SPACE; break;
default: md2 = MD2_MANCHESTER;
}
if (port->settings.loopback)
md2 |= MD2_LOOPBACK;
switch(port->parity) {
case PARITY_CRC16_PR0: md0 = MD0_HDLC | MD0_CRC_16_0; break;
case PARITY_CRC16_PR1: md0 = MD0_HDLC | MD0_CRC_16; break;
case PARITY_CRC32_PR1_CCITT: md0 = MD0_HDLC | MD0_CRC_ITU32; break;
case PARITY_CRC16_PR1_CCITT: md0 = MD0_HDLC | MD0_CRC_ITU; break;
default: md0 = MD0_HDLC | MD0_CRC_NONE;
}
sca_out(CMD_RESET, msci + CMD, card);
sca_out(md0, msci + MD0, card);
sca_out(0x00, msci + MD1, card); /* no address field check */
sca_out(md2, msci + MD2, card);
sca_out(0x7E, msci + IDL, card); /* flag character 0x7E */
/* Skip the rest of underrun frame */
sca_out(CTL_IDLE | CTL_URCT | CTL_URSKP, msci + CTL, card);
sca_out(0x0F, msci + RNR, card); /* +1=RX DMA activation condition */
sca_out(0x3C, msci + TFS, card); /* +1 = TX start */
sca_out(0x38, msci + TCR, card); /* =Critical TX DMA activ condition */
sca_out(0x38, msci + TNR0, card); /* =TX DMA activation condition */
sca_out(0x3F, msci + TNR1, card); /* +1=TX DMA deactivation condition*/
/* We're using the following interrupts:
- RXINTA (DCD changes only)
- DMIB (EOM - single frame transfer complete)
*/
sca_outl(IE0_RXINTA | IE0_CDCD, msci + IE0, card);
sca_out(port->tmc, msci + TMCR, card);
sca_out(port->tmc, msci + TMCT, card);
sca_out(port->rxs, msci + RXS, card);
sca_out(port->txs, msci + TXS, card);
sca_out(CMD_TX_ENABLE, msci + CMD, card);
sca_out(CMD_RX_ENABLE, msci + CMD, card);
sca_set_carrier(port);
enable_intr(port);
napi_enable(&port->napi);
netif_start_queue(dev);
}
static void sca_close(struct net_device *dev)
{
port_t *port = dev_to_port(dev);
/* reset channel */
sca_out(CMD_RESET, get_msci(port) + CMD, port->card);
disable_intr(port);
napi_disable(&port->napi);
netif_stop_queue(dev);
}
static int sca_attach(struct net_device *dev, unsigned short encoding,
unsigned short parity)
{
if (encoding != ENCODING_NRZ &&
encoding != ENCODING_NRZI &&
encoding != ENCODING_FM_MARK &&
encoding != ENCODING_FM_SPACE &&
encoding != ENCODING_MANCHESTER)
return -EINVAL;
if (parity != PARITY_NONE &&
parity != PARITY_CRC16_PR0 &&
parity != PARITY_CRC16_PR1 &&
parity != PARITY_CRC32_PR1_CCITT &&
parity != PARITY_CRC16_PR1_CCITT)
return -EINVAL;
dev_to_port(dev)->encoding = encoding;
dev_to_port(dev)->parity = parity;
return 0;
}
#ifdef DEBUG_RINGS
static void sca_dump_rings(struct net_device *dev)
{
port_t *port = dev_to_port(dev);
card_t *card = port->card;
u16 cnt;
printk(KERN_DEBUG "RX ring: CDA=%u EDA=%u DSR=%02X in=%u %sactive",
sca_inl(get_dmac_rx(port) + CDAL, card),
sca_inl(get_dmac_rx(port) + EDAL, card),
sca_in(DSR_RX(port->chan), card), port->rxin,
sca_in(DSR_RX(port->chan), card) & DSR_DE ? "" : "in");
for (cnt = 0; cnt < port->card->rx_ring_buffers; cnt++)
printk(" %02X", readb(&(desc_address(port, cnt, 0)->stat)));
printk("\n" KERN_DEBUG "TX ring: CDA=%u EDA=%u DSR=%02X in=%u "
"last=%u %sactive",
sca_inl(get_dmac_tx(port) + CDAL, card),
sca_inl(get_dmac_tx(port) + EDAL, card),
sca_in(DSR_TX(port->chan), card), port->txin, port->txlast,
sca_in(DSR_TX(port->chan), card) & DSR_DE ? "" : "in");
for (cnt = 0; cnt < port->card->tx_ring_buffers; cnt++)
printk(" %02X", readb(&(desc_address(port, cnt, 1)->stat)));
printk("\n");
printk(KERN_DEBUG "MSCI: MD: %02x %02x %02x,"
" ST: %02x %02x %02x %02x %02x, FST: %02x CST: %02x %02x\n",
sca_in(get_msci(port) + MD0, card),
sca_in(get_msci(port) + MD1, card),
sca_in(get_msci(port) + MD2, card),
sca_in(get_msci(port) + ST0, card),
sca_in(get_msci(port) + ST1, card),
sca_in(get_msci(port) + ST2, card),
sca_in(get_msci(port) + ST3, card),
sca_in(get_msci(port) + ST4, card),
sca_in(get_msci(port) + FST, card),
sca_in(get_msci(port) + CST0, card),
sca_in(get_msci(port) + CST1, card));
printk(KERN_DEBUG "ILAR: %02x ISR: %08x %08x\n", sca_in(ILAR, card),
sca_inl(ISR0, card), sca_inl(ISR1, card));
}
#endif /* DEBUG_RINGS */
static int sca_xmit(struct sk_buff *skb, struct net_device *dev)
{
port_t *port = dev_to_port(dev);
card_t *card = port->card;
pkt_desc __iomem *desc;
u32 buff, len;
spin_lock_irq(&port->lock);
desc = desc_address(port, port->txin + 1, 1);
BUG_ON(readb(&desc->stat)); /* previous xmit should stop queue */
#ifdef DEBUG_PKT
printk(KERN_DEBUG "%s TX(%i):", dev->name, skb->len);
debug_frame(skb);
#endif
desc = desc_address(port, port->txin, 1);
buff = buffer_offset(port, port->txin, 1);
len = skb->len;
memcpy_toio(card->rambase + buff, skb->data, len);
writew(len, &desc->len);
writeb(ST_TX_EOM, &desc->stat);
dev->trans_start = jiffies;
port->txin = (port->txin + 1) % card->tx_ring_buffers;
sca_outl(desc_offset(port, port->txin, 1),
get_dmac_tx(port) + EDAL, card);
sca_out(DSR_DE, DSR_TX(port->chan), card); /* Enable TX DMA */
desc = desc_address(port, port->txin + 1, 1);
if (readb(&desc->stat)) /* allow 1 packet gap */
netif_stop_queue(dev);
spin_unlock_irq(&port->lock);
dev_kfree_skb(skb);
return 0;
}
static u32 __devinit sca_detect_ram(card_t *card, u8 __iomem *rambase,
u32 ramsize)
{
/* Round RAM size to 32 bits, fill from end to start */
u32 i = ramsize &= ~3;
do {
i -= 4;
writel(i ^ 0x12345678, rambase + i);
} while (i > 0);
for (i = 0; i < ramsize ; i += 4) {
if (readl(rambase + i) != (i ^ 0x12345678))
break;
}
return i;
}
static void __devinit sca_init(card_t *card, int wait_states)
{
sca_out(wait_states, WCRL, card); /* Wait Control */
sca_out(wait_states, WCRM, card);
sca_out(wait_states, WCRH, card);
sca_out(0, DMER, card); /* DMA Master disable */
sca_out(0x03, PCR, card); /* DMA priority */
sca_out(0, DSR_RX(0), card); /* DMA disable - to halt state */
sca_out(0, DSR_TX(0), card);
sca_out(0, DSR_RX(1), card);
sca_out(0, DSR_TX(1), card);
sca_out(DMER_DME, DMER, card); /* DMA Master enable */
}
drivers/net/wan/hdlc_ppp.c
View file @ c46920da
......@@ -2,7 +2,7 @@
* Generic HDLC support routines for Linux
* Point-to-point protocol support
*
* Copyright (C) 1999 - 2006 Krzysztof Halasa <khc@pm.waw.pl>
* Copyright (C) 1999 - 2008 Krzysztof Halasa <khc@pm.waw.pl>
*
* This program is free software; you can redistribute it and/or modify it
* under the terms of version 2 of the GNU General Public License
......@@ -18,87 +18,632 @@
#include <linux/module.h>
#include <linux/pkt_sched.h>
#include <linux/poll.h>
#include <linux/rtnetlink.h>
#include <linux/skbuff.h>
#include <linux/slab.h>
#include <net/syncppp.h>
#include <linux/spinlock.h>
#define DEBUG_CP 0 /* also bytes# to dump */
#define DEBUG_STATE 0
#define DEBUG_HARD_HEADER 0
#define HDLC_ADDR_ALLSTATIONS 0xFF
#define HDLC_CTRL_UI 0x03
#define PID_LCP 0xC021
#define PID_IP 0x0021
#define PID_IPCP 0x8021
#define PID_IPV6 0x0057
#define PID_IPV6CP 0x8057
enum {IDX_LCP = 0, IDX_IPCP, IDX_IPV6CP, IDX_COUNT};
enum {CP_CONF_REQ = 1, CP_CONF_ACK, CP_CONF_NAK, CP_CONF_REJ, CP_TERM_REQ,
CP_TERM_ACK, CP_CODE_REJ, LCP_PROTO_REJ, LCP_ECHO_REQ, LCP_ECHO_REPLY,
LCP_DISC_REQ, CP_CODES};
#if DEBUG_CP
static const char *const code_names[CP_CODES] = {
"0", "ConfReq", "ConfAck", "ConfNak", "ConfRej", "TermReq",
"TermAck", "CodeRej", "ProtoRej", "EchoReq", "EchoReply", "Discard"
};
static char debug_buffer[64 + 3 * DEBUG_CP];
#endif
enum {LCP_OPTION_MRU = 1, LCP_OPTION_ACCM, LCP_OPTION_MAGIC = 5};
struct hdlc_header {
u8 address;
u8 control;
__be16 protocol;
};
struct cp_header {
u8 code;
u8 id;
__be16 len;
};
struct ppp_state {
struct ppp_device pppdev;
struct ppp_device *syncppp_ptr;
int (*old_change_mtu)(struct net_device *dev, int new_mtu);
struct proto {
struct net_device *dev;
struct timer_list timer;
unsigned long timeout;
u16 pid; /* protocol ID */
u8 state;
u8 cr_id; /* ID of last Configuration-Request */
u8 restart_counter;
};
struct ppp {
struct proto protos[IDX_COUNT];
spinlock_t lock;
unsigned long last_pong;
unsigned int req_timeout, cr_retries, term_retries;
unsigned int keepalive_interval, keepalive_timeout;
u8 seq; /* local sequence number for requests */
u8 echo_id; /* ID of last Echo-Request (LCP) */
};
enum {CLOSED = 0, STOPPED, STOPPING, REQ_SENT, ACK_RECV, ACK_SENT, OPENED,
STATES, STATE_MASK = 0xF};
enum {START = 0, STOP, TO_GOOD, TO_BAD, RCR_GOOD, RCR_BAD, RCA, RCN, RTR, RTA,
RUC, RXJ_GOOD, RXJ_BAD, EVENTS};
enum {INV = 0x10, IRC = 0x20, ZRC = 0x40, SCR = 0x80, SCA = 0x100,
SCN = 0x200, STR = 0x400, STA = 0x800, SCJ = 0x1000};
#if DEBUG_STATE
static const char *const state_names[STATES] = {
"Closed", "Stopped", "Stopping", "ReqSent", "AckRecv", "AckSent",
"Opened"
};
static const char *const event_names[EVENTS] = {
"Start", "Stop", "TO+", "TO-", "RCR+", "RCR-", "RCA", "RCN",
"RTR", "RTA", "RUC", "RXJ+", "RXJ-"
};
#endif
static struct sk_buff_head tx_queue; /* used when holding the spin lock */
static int ppp_ioctl(struct net_device *dev, struct ifreq *ifr);
static inline struct ppp* get_ppp(struct net_device *dev)
{
return (struct ppp *)dev_to_hdlc(dev)->state;
}
static inline struct ppp_state* state(hdlc_device *hdlc)
static inline struct proto* get_proto(struct net_device *dev, u16 pid)
{
return(struct ppp_state *)(hdlc->state);
struct ppp *ppp = get_ppp(dev);
switch (pid) {
case PID_LCP:
return &ppp->protos[IDX_LCP];
case PID_IPCP:
return &ppp->protos[IDX_IPCP];
case PID_IPV6CP:
return &ppp->protos[IDX_IPV6CP];
default:
return NULL;
}
}
static inline const char* proto_name(u16 pid)
{
switch (pid) {
case PID_LCP:
return "LCP";
case PID_IPCP:
return "IPCP";
case PID_IPV6CP:
return "IPV6CP";
default:
return NULL;
}
}
static int ppp_open(struct net_device *dev)
static __be16 ppp_type_trans(struct sk_buff *skb, struct net_device *dev)
{
hdlc_device *hdlc = dev_to_hdlc(dev);
int (*old_ioctl)(struct net_device *, struct ifreq *, int);
int result;
struct hdlc_header *data = (struct hdlc_header*)skb->data;
if (skb->len < sizeof(struct hdlc_header))
return htons(ETH_P_HDLC);
if (data->address != HDLC_ADDR_ALLSTATIONS ||
data->control != HDLC_CTRL_UI)
return htons(ETH_P_HDLC);
switch (data->protocol) {
case __constant_htons(PID_IP):
skb_pull(skb, sizeof(struct hdlc_header));
return htons(ETH_P_IP);
dev->ml_priv = &state(hdlc)->syncppp_ptr;
state(hdlc)->syncppp_ptr = &state(hdlc)->pppdev;
state(hdlc)->pppdev.dev = dev;
case __constant_htons(PID_IPV6):
skb_pull(skb, sizeof(struct hdlc_header));
return htons(ETH_P_IPV6);
old_ioctl = dev->do_ioctl;
state(hdlc)->old_change_mtu = dev->change_mtu;
sppp_attach(&state(hdlc)->pppdev);
/* sppp_attach nukes them. We don't need syncppp's ioctl */
dev->do_ioctl = old_ioctl;
state(hdlc)->pppdev.sppp.pp_flags &= ~PP_CISCO;
dev->type = ARPHRD_PPP;
result = sppp_open(dev);
if (result) {
sppp_detach(dev);
return result;
default:
return htons(ETH_P_HDLC);
}
}
return 0;
static int ppp_hard_header(struct sk_buff *skb, struct net_device *dev,
u16 type, const void *daddr, const void *saddr,
unsigned int len)
{
struct hdlc_header *data;
#if DEBUG_HARD_HEADER
printk(KERN_DEBUG "%s: ppp_hard_header() called\n", dev->name);
#endif
skb_push(skb, sizeof(struct hdlc_header));
data = (struct hdlc_header*)skb->data;
data->address = HDLC_ADDR_ALLSTATIONS;
data->control = HDLC_CTRL_UI;
switch (type) {
case ETH_P_IP:
data->protocol = htons(PID_IP);
break;
case ETH_P_IPV6:
data->protocol = htons(PID_IPV6);
break;
case PID_LCP:
case PID_IPCP:
case PID_IPV6CP:
data->protocol = htons(type);
break;
default: /* unknown protocol */
data->protocol = 0;
}
return sizeof(struct hdlc_header);
}
static void ppp_tx_flush(void)
{
struct sk_buff *skb;
while ((skb = skb_dequeue(&tx_queue)) != NULL)
dev_queue_xmit(skb);
}
static void ppp_close(struct net_device *dev)
static void ppp_tx_cp(struct net_device *dev, u16 pid, u8 code,
u8 id, unsigned int len, const void *data)
{
hdlc_device *hdlc = dev_to_hdlc(dev);
struct sk_buff *skb;
struct cp_header *cp;
unsigned int magic_len = 0;
static u32 magic;
#if DEBUG_CP
int i;
char *ptr;
#endif
if (pid == PID_LCP && (code == LCP_ECHO_REQ || code == LCP_ECHO_REPLY))
magic_len = sizeof(magic);
skb = dev_alloc_skb(sizeof(struct hdlc_header) +
sizeof(struct cp_header) + magic_len + len);
if (!skb) {
printk(KERN_WARNING "%s: out of memory in ppp_tx_cp()\n",
dev->name);
return;
}
skb_reserve(skb, sizeof(struct hdlc_header));
cp = (struct cp_header *)skb_put(skb, sizeof(struct cp_header));
cp->code = code;
cp->id = id;
cp->len = htons(sizeof(struct cp_header) + magic_len + len);
if (magic_len)
memcpy(skb_put(skb, magic_len), &magic, magic_len);
if (len)
memcpy(skb_put(skb, len), data, len);
#if DEBUG_CP
BUG_ON(code >= CP_CODES);
ptr = debug_buffer;
*ptr = '\x0';
for (i = 0; i < min_t(unsigned int, magic_len + len, DEBUG_CP); i++) {
sprintf(ptr, " %02X", skb->data[sizeof(struct cp_header) + i]);
ptr += strlen(ptr);
}
printk(KERN_DEBUG "%s: TX %s [%s id 0x%X]%s\n", dev->name,
proto_name(pid), code_names[code], id, debug_buffer);
#endif
sppp_close(dev);
sppp_detach(dev);
ppp_hard_header(skb, dev, pid, NULL, NULL, 0);
dev->change_mtu = state(hdlc)->old_change_mtu;
dev->mtu = HDLC_MAX_MTU;
dev->hard_header_len = 16;
skb->priority = TC_PRIO_CONTROL;
skb->dev = dev;
skb_reset_network_header(skb);
skb_queue_tail(&tx_queue, skb);
}
/* State transition table (compare STD-51)
Events Actions
TO+ = Timeout with counter > 0 irc = Initialize-Restart-Count
TO- = Timeout with counter expired zrc = Zero-Restart-Count
RCR+ = Receive-Configure-Request (Good) scr = Send-Configure-Request
RCR- = Receive-Configure-Request (Bad)
RCA = Receive-Configure-Ack sca = Send-Configure-Ack
RCN = Receive-Configure-Nak/Rej scn = Send-Configure-Nak/Rej
RTR = Receive-Terminate-Request str = Send-Terminate-Request
RTA = Receive-Terminate-Ack sta = Send-Terminate-Ack
RUC = Receive-Unknown-Code scj = Send-Code-Reject
RXJ+ = Receive-Code-Reject (permitted)
or Receive-Protocol-Reject
RXJ- = Receive-Code-Reject (catastrophic)
or Receive-Protocol-Reject
*/
static int cp_table[EVENTS][STATES] = {
/* CLOSED STOPPED STOPPING REQ_SENT ACK_RECV ACK_SENT OPENED
0 1 2 3 4 5 6 */
{IRC|SCR|3, INV , INV , INV , INV , INV , INV }, /* START */
{ INV , 0 , 0 , 0 , 0 , 0 , 0 }, /* STOP */
{ INV , INV ,STR|2, SCR|3 ,SCR|3, SCR|5 , INV }, /* TO+ */
{ INV , INV , 1 , 1 , 1 , 1 , INV }, /* TO- */
{ STA|0 ,IRC|SCR|SCA|5, 2 , SCA|5 ,SCA|6, SCA|5 ,SCR|SCA|5}, /* RCR+ */
{ STA|0 ,IRC|SCR|SCN|3, 2 , SCN|3 ,SCN|4, SCN|3 ,SCR|SCN|3}, /* RCR- */
{ STA|0 , STA|1 , 2 , IRC|4 ,SCR|3, 6 , SCR|3 }, /* RCA */
{ STA|0 , STA|1 , 2 ,IRC|SCR|3,SCR|3,IRC|SCR|5, SCR|3 }, /* RCN */
{ STA|0 , STA|1 ,STA|2, STA|3 ,STA|3, STA|3 ,ZRC|STA|2}, /* RTR */
{ 0 , 1 , 1 , 3 , 3 , 5 , SCR|3 }, /* RTA */
{ SCJ|0 , SCJ|1 ,SCJ|2, SCJ|3 ,SCJ|4, SCJ|5 , SCJ|6 }, /* RUC */
{ 0 , 1 , 2 , 3 , 3 , 5 , 6 }, /* RXJ+ */
{ 0 , 1 , 1 , 1 , 1 , 1 ,IRC|STR|2}, /* RXJ- */
};
static __be16 ppp_type_trans(struct sk_buff *skb, struct net_device *dev)
/* SCA: RCR+ must supply id, len and data
SCN: RCR- must supply code, id, len and data
STA: RTR must supply id
SCJ: RUC must supply CP packet len and data */
static void ppp_cp_event(struct net_device *dev, u16 pid, u16 event, u8 code,
u8 id, unsigned int len, void *data)
{
return __constant_htons(ETH_P_WAN_PPP);
int old_state, action;
struct ppp *ppp = get_ppp(dev);
struct proto *proto = get_proto(dev, pid);
old_state = proto->state;
BUG_ON(old_state >= STATES);
BUG_ON(event >= EVENTS);
#if DEBUG_STATE
printk(KERN_DEBUG "%s: %s ppp_cp_event(%s) %s ...\n", dev->name,
proto_name(pid), event_names[event], state_names[proto->state]);
#endif
action = cp_table[event][old_state];
proto->state = action & STATE_MASK;
if (action & (SCR | STR)) /* set Configure-Req/Terminate-Req timer */
mod_timer(&proto->timer, proto->timeout =
jiffies + ppp->req_timeout * HZ);
if (action & ZRC)
proto->restart_counter = 0;
if (action & IRC)
proto->restart_counter = (proto->state == STOPPING) ?
ppp->term_retries : ppp->cr_retries;
if (action & SCR) /* send Configure-Request */
ppp_tx_cp(dev, pid, CP_CONF_REQ, proto->cr_id = ++ppp->seq,
0, NULL);
if (action & SCA) /* send Configure-Ack */
ppp_tx_cp(dev, pid, CP_CONF_ACK, id, len, data);
if (action & SCN) /* send Configure-Nak/Reject */
ppp_tx_cp(dev, pid, code, id, len, data);
if (action & STR) /* send Terminate-Request */
ppp_tx_cp(dev, pid, CP_TERM_REQ, ++ppp->seq, 0, NULL);
if (action & STA) /* send Terminate-Ack */
ppp_tx_cp(dev, pid, CP_TERM_ACK, id, 0, NULL);
if (action & SCJ) /* send Code-Reject */
ppp_tx_cp(dev, pid, CP_CODE_REJ, ++ppp->seq, len, data);
if (old_state != OPENED && proto->state == OPENED) {
printk(KERN_INFO "%s: %s up\n", dev->name, proto_name(pid));
if (pid == PID_LCP) {
netif_dormant_off(dev);
ppp_cp_event(dev, PID_IPCP, START, 0, 0, 0, NULL);
ppp_cp_event(dev, PID_IPV6CP, START, 0, 0, 0, NULL);
ppp->last_pong = jiffies;
mod_timer(&proto->timer, proto->timeout =
jiffies + ppp->keepalive_interval * HZ);
}
}
if (old_state == OPENED && proto->state != OPENED) {
printk(KERN_INFO "%s: %s down\n", dev->name, proto_name(pid));
if (pid == PID_LCP) {
netif_dormant_on(dev);
ppp_cp_event(dev, PID_IPCP, STOP, 0, 0, 0, NULL);
ppp_cp_event(dev, PID_IPV6CP, STOP, 0, 0, 0, NULL);
}
}
if (old_state != CLOSED && proto->state == CLOSED)
del_timer(&proto->timer);
#if DEBUG_STATE
printk(KERN_DEBUG "%s: %s ppp_cp_event(%s) ... %s\n", dev->name,
proto_name(pid), event_names[event], state_names[proto->state]);
#endif
}
static void ppp_cp_parse_cr(struct net_device *dev, u16 pid, u8 id,
unsigned int len, u8 *data)
{
static u8 const valid_accm[6] = { LCP_OPTION_ACCM, 6, 0, 0, 0, 0 };
u8 *opt, *out;
unsigned int nak_len = 0, rej_len = 0;
if (!(out = kmalloc(len, GFP_ATOMIC))) {
dev->stats.rx_dropped++;
return; /* out of memory, ignore CR packet */
}
for (opt = data; len; len -= opt[1], opt += opt[1]) {
if (len < 2 || len < opt[1]) {
dev->stats.rx_errors++;
return; /* bad packet, drop silently */
}
if (pid == PID_LCP)
switch (opt[0]) {
case LCP_OPTION_MRU:
continue; /* MRU always OK and > 1500 bytes? */
case LCP_OPTION_ACCM: /* async control character map */
if (!memcmp(opt, valid_accm,
sizeof(valid_accm)))
continue;
if (!rej_len) { /* NAK it */
memcpy(out + nak_len, valid_accm,
sizeof(valid_accm));
nak_len += sizeof(valid_accm);
continue;
}
break;
case LCP_OPTION_MAGIC:
if (opt[1] != 6 || (!opt[2] && !opt[3] &&
!opt[4] && !opt[5]))
break; /* reject invalid magic number */
continue;
}
/* reject this option */
memcpy(out + rej_len, opt, opt[1]);
rej_len += opt[1];
}
if (rej_len)
ppp_cp_event(dev, pid, RCR_BAD, CP_CONF_REJ, id, rej_len, out);
else if (nak_len)
ppp_cp_event(dev, pid, RCR_BAD, CP_CONF_NAK, id, nak_len, out);
else
ppp_cp_event(dev, pid, RCR_GOOD, CP_CONF_ACK, id, len, data);
kfree(out);
}
static int ppp_rx(struct sk_buff *skb)
{
struct hdlc_header *hdr = (struct hdlc_header*)skb->data;
struct net_device *dev = skb->dev;
struct ppp *ppp = get_ppp(dev);
struct proto *proto;
struct cp_header *cp;
unsigned long flags;
unsigned int len;
u16 pid;
#if DEBUG_CP
int i;
char *ptr;
#endif
spin_lock_irqsave(&ppp->lock, flags);
/* Check HDLC header */
if (skb->len < sizeof(struct hdlc_header))
goto rx_error;
cp = (struct cp_header*)skb_pull(skb, sizeof(struct hdlc_header));
if (hdr->address != HDLC_ADDR_ALLSTATIONS ||
hdr->control != HDLC_CTRL_UI)
goto rx_error;
pid = ntohs(hdr->protocol);
proto = get_proto(dev, pid);
if (!proto) {
if (ppp->protos[IDX_LCP].state == OPENED)
ppp_tx_cp(dev, PID_LCP, LCP_PROTO_REJ,
++ppp->seq, skb->len + 2, &hdr->protocol);
goto rx_error;
}
len = ntohs(cp->len);
if (len < sizeof(struct cp_header) /* no complete CP header? */ ||
skb->len < len /* truncated packet? */)
goto rx_error;
skb_pull(skb, sizeof(struct cp_header));
len -= sizeof(struct cp_header);
/* HDLC and CP headers stripped from skb */
#if DEBUG_CP
if (cp->code < CP_CODES)
sprintf(debug_buffer, "[%s id 0x%X]", code_names[cp->code],
cp->id);
else
sprintf(debug_buffer, "[code %u id 0x%X]", cp->code, cp->id);
ptr = debug_buffer + strlen(debug_buffer);
for (i = 0; i < min_t(unsigned int, len, DEBUG_CP); i++) {
sprintf(ptr, " %02X", skb->data[i]);
ptr += strlen(ptr);
}
printk(KERN_DEBUG "%s: RX %s %s\n", dev->name, proto_name(pid),
debug_buffer);
#endif
/* LCP only */
if (pid == PID_LCP)
switch (cp->code) {
case LCP_PROTO_REJ:
pid = ntohs(*(__be16*)skb->data);
if (pid == PID_LCP || pid == PID_IPCP ||
pid == PID_IPV6CP)
ppp_cp_event(dev, pid, RXJ_BAD, 0, 0,
0, NULL);
goto out;
case LCP_ECHO_REQ: /* send Echo-Reply */
if (len >= 4 && proto->state == OPENED)
ppp_tx_cp(dev, PID_LCP, LCP_ECHO_REPLY,
cp->id, len - 4, skb->data + 4);
goto out;
case LCP_ECHO_REPLY:
if (cp->id == ppp->echo_id)
ppp->last_pong = jiffies;
goto out;
case LCP_DISC_REQ: /* discard */
goto out;
}
/* LCP, IPCP and IPV6CP */
switch (cp->code) {
case CP_CONF_REQ:
ppp_cp_parse_cr(dev, pid, cp->id, len, skb->data);
goto out;
case CP_CONF_ACK:
if (cp->id == proto->cr_id)
ppp_cp_event(dev, pid, RCA, 0, 0, 0, NULL);
goto out;
case CP_CONF_REJ:
case CP_CONF_NAK:
if (cp->id == proto->cr_id)
ppp_cp_event(dev, pid, RCN, 0, 0, 0, NULL);
goto out;
case CP_TERM_REQ:
ppp_cp_event(dev, pid, RTR, 0, cp->id, 0, NULL);
goto out;
case CP_TERM_ACK:
ppp_cp_event(dev, pid, RTA, 0, 0, 0, NULL);
goto out;
case CP_CODE_REJ:
ppp_cp_event(dev, pid, RXJ_BAD, 0, 0, 0, NULL);
goto out;
default:
len += sizeof(struct cp_header);
if (len > dev->mtu)
len = dev->mtu;
ppp_cp_event(dev, pid, RUC, 0, 0, len, cp);
goto out;
}
goto out;
rx_error:
dev->stats.rx_errors++;
out:
spin_unlock_irqrestore(&ppp->lock, flags);
dev_kfree_skb_any(skb);
ppp_tx_flush();
return NET_RX_DROP;
}
static void ppp_timer(unsigned long arg)
{
struct proto *proto = (struct proto *)arg;
struct ppp *ppp = get_ppp(proto->dev);
unsigned long flags;
spin_lock_irqsave(&ppp->lock, flags);
switch (proto->state) {
case STOPPING:
case REQ_SENT:
case ACK_RECV:
case ACK_SENT:
if (proto->restart_counter) {
ppp_cp_event(proto->dev, proto->pid, TO_GOOD, 0, 0,
0, NULL);
proto->restart_counter--;
} else
ppp_cp_event(proto->dev, proto->pid, TO_BAD, 0, 0,
0, NULL);
break;
case OPENED:
if (proto->pid != PID_LCP)
break;
if (time_after(jiffies, ppp->last_pong +
ppp->keepalive_timeout * HZ)) {
printk(KERN_INFO "%s: Link down\n", proto->dev->name);
ppp_cp_event(proto->dev, PID_LCP, STOP, 0, 0, 0, NULL);
ppp_cp_event(proto->dev, PID_LCP, START, 0, 0, 0, NULL);
} else { /* send keep-alive packet */
ppp->echo_id = ++ppp->seq;
ppp_tx_cp(proto->dev, PID_LCP, LCP_ECHO_REQ,
ppp->echo_id, 0, NULL);
proto->timer.expires = jiffies +
ppp->keepalive_interval * HZ;
add_timer(&proto->timer);
}
break;
}
spin_unlock_irqrestore(&ppp->lock, flags);
ppp_tx_flush();
}
static void ppp_start(struct net_device *dev)
{
struct ppp *ppp = get_ppp(dev);
int i;
for (i = 0; i < IDX_COUNT; i++) {
struct proto *proto = &ppp->protos[i];
proto->dev = dev;
init_timer(&proto->timer);
proto->timer.function = ppp_timer;
proto->timer.data = (unsigned long)proto;
proto->state = CLOSED;
}
ppp->protos[IDX_LCP].pid = PID_LCP;
ppp->protos[IDX_IPCP].pid = PID_IPCP;
ppp->protos[IDX_IPV6CP].pid = PID_IPV6CP;
ppp_cp_event(dev, PID_LCP, START, 0, 0, 0, NULL);
}
static void ppp_stop(struct net_device *dev)
{
ppp_cp_event(dev, PID_LCP, STOP, 0, 0, 0, NULL);
}
static struct hdlc_proto proto = {
.open = ppp_open,
.close = ppp_close,
.start = ppp_start,
.stop = ppp_stop,
.type_trans = ppp_type_trans,
.ioctl = ppp_ioctl,
.netif_rx = ppp_rx,
.module = THIS_MODULE,
};
static const struct header_ops ppp_header_ops = {
.create = ppp_hard_header,
};
static int ppp_ioctl(struct net_device *dev, struct ifreq *ifr)
{
hdlc_device *hdlc = dev_to_hdlc(dev);
struct ppp *ppp;
int result;
switch (ifr->ifr_settings.type) {
......@@ -109,25 +654,35 @@ static int ppp_ioctl(struct net_device *dev, struct ifreq *ifr)
return 0; /* return protocol only, no settable parameters */
case IF_PROTO_PPP:
if(!capable(CAP_NET_ADMIN))
if (!capable(CAP_NET_ADMIN))
return -EPERM;
if(dev->flags & IFF_UP)
if (dev->flags & IFF_UP)
return -EBUSY;
/* no settable parameters */
result=hdlc->attach(dev, ENCODING_NRZ,PARITY_CRC16_PR1_CCITT);
result = hdlc->attach(dev, ENCODING_NRZ,PARITY_CRC16_PR1_CCITT);
if (result)
return result;
result = attach_hdlc_protocol(dev, &proto,
sizeof(struct ppp_state));
result = attach_hdlc_protocol(dev, &proto, sizeof(struct ppp));
if (result)
return result;
ppp = get_ppp(dev);
spin_lock_init(&ppp->lock);
ppp->req_timeout = 2;
ppp->cr_retries = 10;
ppp->term_retries = 2;
ppp->keepalive_interval = 10;
ppp->keepalive_timeout = 60;
dev->hard_start_xmit = hdlc->xmit;
dev->hard_header_len = sizeof(struct hdlc_header);
dev->header_ops = &ppp_header_ops;
dev->type = ARPHRD_PPP;
netif_dormant_off(dev);
netif_dormant_on(dev);
return 0;
}
......@@ -137,12 +692,11 @@ static int ppp_ioctl(struct net_device *dev, struct ifreq *ifr)
static int __init mod_init(void)
{
skb_queue_head_init(&tx_queue);
register_hdlc_protocol(&proto);
return 0;
}
static void __exit mod_exit(void)
{
unregister_hdlc_protocol(&proto);
......
drivers/net/wan/n2.c
View file @ c46920da
......@@ -53,7 +53,7 @@ static const char* devname = "RISCom/N2";
#define NEED_SCA_MSCI_INTR
#define MAX_TX_BUFFERS 10
static char *hw = NULL; /* pointer to hw=xxx command line string */
static char *hw; /* pointer to hw=xxx command line string */
/* RISCom/N2 Board Registers */
......@@ -145,7 +145,6 @@ static card_t **new_card = &first_card;
&(card)->ports[port] : NULL)
static __inline__ u8 sca_get_page(card_t *card)
{
return inb(card->io + N2_PSR) & PSR_PAGEBITS;
......@@ -159,9 +158,7 @@ static __inline__ void openwin(card_t *card, u8 page)
}
#include "hd6457x.c"
#include "hd64570.c"
static void n2_set_iface(port_t *port)
......@@ -478,7 +475,7 @@ static int __init n2_run(unsigned long io, unsigned long irq,
n2_destroy_card(card);
return -ENOBUFS;
}
sca_init_sync_port(port); /* Set up SCA memory */
sca_init_port(port); /* Set up SCA memory */
printk(KERN_INFO "%s: RISCom/N2 node %d\n",
dev->name, port->phy_node);
......
drivers/net/wan/pc300too.c
View file @ c46920da
/*
* Cyclades PC300 synchronous serial card driver for Linux
*
* Copyright (C) 2000-2007 Krzysztof Halasa <khc@pm.waw.pl>
* Copyright (C) 2000-2008 Krzysztof Halasa <khc@pm.waw.pl>
*
* This program is free software; you can redistribute it and/or modify it
* under the terms of version 2 of the GNU General Public License
......@@ -11,7 +11,7 @@
*
* Sources of information:
* Hitachi HD64572 SCA-II User's Manual
* Cyclades PC300 Linux driver
* Original Cyclades PC300 Linux driver
*
* This driver currently supports only PC300/RSV (V.24/V.35) and
* PC300/X21 cards.
......@@ -37,17 +37,11 @@
#include "hd64572.h"
static const char* version = "Cyclades PC300 driver version: 1.17";
static const char* devname = "PC300";
#undef DEBUG_PKT
#define DEBUG_RINGS
#define PC300_PLX_SIZE 0x80 /* PLX control window size (128 B) */
#define PC300_SCA_SIZE 0x400 /* SCA window size (1 KB) */
#define ALL_PAGES_ALWAYS_MAPPED
#define NEED_DETECT_RAM
#define NEED_SCA_MSCI_INTR
#define MAX_TX_BUFFERS 10
static int pci_clock_freq = 33000000;
......@@ -81,7 +75,8 @@ typedef struct {
typedef struct port_s {
struct net_device *dev;
struct napi_struct napi;
struct net_device *netdev;
struct card_s *card;
spinlock_t lock; /* TX lock */
sync_serial_settings settings;
......@@ -93,7 +88,7 @@ typedef struct port_s {
u16 txin; /* tx ring buffer 'in' and 'last' pointers */
u16 txlast;
u8 rxs, txs, tmc; /* SCA registers */
u8 phy_node; /* physical port # - 0 or 1 */
u8 chan; /* physical port # - 0 or 1 */
}port_t;
......@@ -114,21 +109,10 @@ typedef struct card_s {
}card_t;
#define sca_in(reg, card) readb(card->scabase + (reg))
#define sca_out(value, reg, card) writeb(value, card->scabase + (reg))
#define sca_inw(reg, card) readw(card->scabase + (reg))
#define sca_outw(value, reg, card) writew(value, card->scabase + (reg))
#define sca_inl(reg, card) readl(card->scabase + (reg))
#define sca_outl(value, reg, card) writel(value, card->scabase + (reg))
#define port_to_card(port) (port->card)
#define log_node(port) (port->phy_node)
#define phy_node(port) (port->phy_node)
#define winbase(card) (card->rambase)
#define get_port(card, port) ((port) < (card)->n_ports ? \
(&(card)->ports[port]) : (NULL))
#include "hd6457x.c"
#include "hd64572.c"
static void pc300_set_iface(port_t *port)
......@@ -139,8 +123,8 @@ static void pc300_set_iface(port_t *port)
u8 rxs = port->rxs & CLK_BRG_MASK;
u8 txs = port->txs & CLK_BRG_MASK;
sca_out(EXS_TES1, (phy_node(port) ? MSCI1_OFFSET : MSCI0_OFFSET) + EXS,
port_to_card(port));
sca_out(EXS_TES1, (port->chan ? MSCI1_OFFSET : MSCI0_OFFSET) + EXS,
port->card);
switch(port->settings.clock_type) {
case CLOCK_INT:
rxs |= CLK_BRG; /* BRG output */
......@@ -172,10 +156,10 @@ static void pc300_set_iface(port_t *port)
if (port->card->type == PC300_RSV) {
if (port->iface == IF_IFACE_V35)
writel(card->init_ctrl_value |
PC300_CHMEDIA_MASK(port->phy_node), init_ctrl);
PC300_CHMEDIA_MASK(port->chan), init_ctrl);
else
writel(card->init_ctrl_value &
~PC300_CHMEDIA_MASK(port->phy_node), init_ctrl);
~PC300_CHMEDIA_MASK(port->chan), init_ctrl);
}
}
......@@ -280,10 +264,8 @@ static void pc300_pci_remove_one(struct pci_dev *pdev)
card_t *card = pci_get_drvdata(pdev);
for (i = 0; i < 2; i++)
if (card->ports[i].card) {
struct net_device *dev = port_to_dev(&card->ports[i]);
unregister_hdlc_device(dev);
}
if (card->ports[i].card)
unregister_hdlc_device(card->ports[i].netdev);
if (card->irq)
free_irq(card->irq, card);
......@@ -298,10 +280,10 @@ static void pc300_pci_remove_one(struct pci_dev *pdev)
pci_release_regions(pdev);
pci_disable_device(pdev);
pci_set_drvdata(pdev, NULL);
if (card->ports[0].dev)
free_netdev(card->ports[0].dev);
if (card->ports[1].dev)
free_netdev(card->ports[1].dev);
if (card->ports[0].netdev)
free_netdev(card->ports[0].netdev);
if (card->ports[1].netdev)
free_netdev(card->ports[1].netdev);
kfree(card);
}
......@@ -318,12 +300,6 @@ static int __devinit pc300_pci_init_one(struct pci_dev *pdev,
u32 scaphys; /* SCA memory base */
u32 plxphys; /* PLX registers memory base */
#ifndef MODULE
static int printed_version;
if (!printed_version++)
printk(KERN_INFO "%s\n", version);
#endif
i = pci_enable_device(pdev);
if (i)
return i;
......@@ -343,27 +319,6 @@ static int __devinit pc300_pci_init_one(struct pci_dev *pdev,
}
pci_set_drvdata(pdev, card);
if (pdev->device == PCI_DEVICE_ID_PC300_TE_1 ||
pdev->device == PCI_DEVICE_ID_PC300_TE_2)
card->type = PC300_TE; /* not fully supported */
else if (card->init_ctrl_value & PC300_CTYPE_MASK)
card->type = PC300_X21;
else
card->type = PC300_RSV;
if (pdev->device == PCI_DEVICE_ID_PC300_RX_1 ||
pdev->device == PCI_DEVICE_ID_PC300_TE_1)
card->n_ports = 1;
else
card->n_ports = 2;
for (i = 0; i < card->n_ports; i++)
if (!(card->ports[i].dev = alloc_hdlcdev(&card->ports[i]))) {
printk(KERN_ERR "pc300: unable to allocate memory\n");
pc300_pci_remove_one(pdev);
return -ENOMEM;
}
if (pci_resource_len(pdev, 0) != PC300_PLX_SIZE ||
pci_resource_len(pdev, 2) != PC300_SCA_SIZE ||
pci_resource_len(pdev, 3) < 16384) {
......@@ -372,13 +327,13 @@ static int __devinit pc300_pci_init_one(struct pci_dev *pdev,
return -EFAULT;
}
plxphys = pci_resource_start(pdev,0) & PCI_BASE_ADDRESS_MEM_MASK;
plxphys = pci_resource_start(pdev, 0) & PCI_BASE_ADDRESS_MEM_MASK;
card->plxbase = ioremap(plxphys, PC300_PLX_SIZE);
scaphys = pci_resource_start(pdev,2) & PCI_BASE_ADDRESS_MEM_MASK;
scaphys = pci_resource_start(pdev, 2) & PCI_BASE_ADDRESS_MEM_MASK;
card->scabase = ioremap(scaphys, PC300_SCA_SIZE);
ramphys = pci_resource_start(pdev,3) & PCI_BASE_ADDRESS_MEM_MASK;
ramphys = pci_resource_start(pdev, 3) & PCI_BASE_ADDRESS_MEM_MASK;
card->rambase = pci_ioremap_bar(pdev, 3);
if (card->plxbase == NULL ||
......@@ -393,6 +348,27 @@ static int __devinit pc300_pci_init_one(struct pci_dev *pdev,
card->init_ctrl_value = readl(&((plx9050 __iomem *)card->scabase)->init_ctrl);
pci_write_config_dword(pdev, PCI_BASE_ADDRESS_0, plxphys);
if (pdev->device == PCI_DEVICE_ID_PC300_TE_1 ||
pdev->device == PCI_DEVICE_ID_PC300_TE_2)
card->type = PC300_TE; /* not fully supported */
else if (card->init_ctrl_value & PC300_CTYPE_MASK)
card->type = PC300_X21;
else
card->type = PC300_RSV;
if (pdev->device == PCI_DEVICE_ID_PC300_RX_1 ||
pdev->device == PCI_DEVICE_ID_PC300_TE_1)
card->n_ports = 1;
else
card->n_ports = 2;
for (i = 0; i < card->n_ports; i++)
if (!(card->ports[i].netdev = alloc_hdlcdev(&card->ports[i]))) {
printk(KERN_ERR "pc300: unable to allocate memory\n");
pc300_pci_remove_one(pdev);
return -ENOMEM;
}
/* Reset PLX */
p = &card->plxbase->init_ctrl;
writel(card->init_ctrl_value | 0x40000000, p);
......@@ -446,7 +422,7 @@ static int __devinit pc300_pci_init_one(struct pci_dev *pdev,
writew(0x0041, &card->plxbase->intr_ctrl_stat);
/* Allocate IRQ */
if (request_irq(pdev->irq, sca_intr, IRQF_SHARED, devname, card)) {
if (request_irq(pdev->irq, sca_intr, IRQF_SHARED, "pc300", card)) {
printk(KERN_WARNING "pc300: could not allocate IRQ%d.\n",
pdev->irq);
pc300_pci_remove_one(pdev);
......@@ -463,9 +439,9 @@ static int __devinit pc300_pci_init_one(struct pci_dev *pdev,
for (i = 0; i < card->n_ports; i++) {
port_t *port = &card->ports[i];
struct net_device *dev = port_to_dev(port);
struct net_device *dev = port->netdev;
hdlc_device *hdlc = dev_to_hdlc(dev);
port->phy_node = i;
port->chan = i;
spin_lock_init(&port->lock);
dev->irq = card->irq;
......@@ -484,6 +460,7 @@ static int __devinit pc300_pci_init_one(struct pci_dev *pdev,
else
port->iface = IF_IFACE_V35;
sca_init_port(port);
if (register_hdlc_device(dev)) {
printk(KERN_ERR "pc300: unable to register hdlc "
"device\n");
......@@ -491,10 +468,9 @@ static int __devinit pc300_pci_init_one(struct pci_dev *pdev,
pc300_pci_remove_one(pdev);
return -ENOBUFS;
}
sca_init_sync_port(port); /* Set up SCA memory */
printk(KERN_INFO "%s: PC300 node %d\n",
dev->name, port->phy_node);
printk(KERN_INFO "%s: PC300 channel %d\n",
dev->name, port->chan);
}
return 0;
}
......@@ -524,9 +500,6 @@ static struct pci_driver pc300_pci_driver = {
static int __init pc300_init_module(void)
{
#ifdef MODULE
printk(KERN_INFO "%s\n", version);
#endif
if (pci_clock_freq < 1000000 || pci_clock_freq > 80000000) {
printk(KERN_ERR "pc300: Invalid PCI clock frequency\n");
return -EINVAL;
......
drivers/net/wan/pci200syn.c
View file @ c46920da
/*
* Goramo PCI200SYN synchronous serial card driver for Linux
*
* Copyright (C) 2002-2003 Krzysztof Halasa <khc@pm.waw.pl>
* Copyright (C) 2002-2008 Krzysztof Halasa <khc@pm.waw.pl>
*
* This program is free software; you can redistribute it and/or modify it
* under the terms of version 2 of the GNU General Public License
......@@ -33,17 +33,11 @@
#include "hd64572.h"
static const char* version = "Goramo PCI200SYN driver version: 1.16";
static const char* devname = "PCI200SYN";
#undef DEBUG_PKT
#define DEBUG_RINGS
#define PCI200SYN_PLX_SIZE 0x80 /* PLX control window size (128b) */
#define PCI200SYN_SCA_SIZE 0x400 /* SCA window size (1Kb) */
#define ALL_PAGES_ALWAYS_MAPPED
#define NEED_DETECT_RAM
#define NEED_SCA_MSCI_INTR
#define MAX_TX_BUFFERS 10
static int pci_clock_freq = 33000000;
......@@ -68,7 +62,8 @@ typedef struct {
typedef struct port_s {
struct net_device *dev;
struct napi_struct napi;
struct net_device *netdev;
struct card_s *card;
spinlock_t lock; /* TX lock */
sync_serial_settings settings;
......@@ -79,7 +74,7 @@ typedef struct port_s {
u16 txin; /* tx ring buffer 'in' and 'last' pointers */
u16 txlast;
u8 rxs, txs, tmc; /* SCA registers */
u8 phy_node; /* physical port # - 0 or 1 */
u8 chan; /* physical port # - 0 or 1 */
}port_t;
......@@ -97,17 +92,6 @@ typedef struct card_s {
}card_t;
#define sca_in(reg, card) readb(card->scabase + (reg))
#define sca_out(value, reg, card) writeb(value, card->scabase + (reg))
#define sca_inw(reg, card) readw(card->scabase + (reg))
#define sca_outw(value, reg, card) writew(value, card->scabase + (reg))
#define sca_inl(reg, card) readl(card->scabase + (reg))
#define sca_outl(value, reg, card) writel(value, card->scabase + (reg))
#define port_to_card(port) (port->card)
#define log_node(port) (port->phy_node)
#define phy_node(port) (port->phy_node)
#define winbase(card) (card->rambase)
#define get_port(card, port) (&card->ports[port])
#define sca_flush(card) (sca_in(IER0, card));
......@@ -127,7 +111,7 @@ static inline void new_memcpy_toio(char __iomem *dest, char *src, int length)
#undef memcpy_toio
#define memcpy_toio new_memcpy_toio
#include "hd6457x.c"
#include "hd64572.c"
static void pci200_set_iface(port_t *port)
......@@ -137,8 +121,8 @@ static void pci200_set_iface(port_t *port)
u8 rxs = port->rxs & CLK_BRG_MASK;
u8 txs = port->txs & CLK_BRG_MASK;
sca_out(EXS_TES1, (phy_node(port) ? MSCI1_OFFSET : MSCI0_OFFSET) + EXS,
port_to_card(port));
sca_out(EXS_TES1, (port->chan ? MSCI1_OFFSET : MSCI0_OFFSET) + EXS,
port->card);
switch(port->settings.clock_type) {
case CLOCK_INT:
rxs |= CLK_BRG; /* BRG output */
......@@ -180,7 +164,7 @@ static int pci200_open(struct net_device *dev)
sca_open(dev);
pci200_set_iface(port);
sca_flush(port_to_card(port));
sca_flush(port->card);
return 0;
}
......@@ -189,7 +173,7 @@ static int pci200_open(struct net_device *dev)
static int pci200_close(struct net_device *dev)
{
sca_close(dev);
sca_flush(port_to_card(dev_to_port(dev)));
sca_flush(dev_to_port(dev)->card);
hdlc_close(dev);
return 0;
}
......@@ -242,7 +226,7 @@ static int pci200_ioctl(struct net_device *dev, struct ifreq *ifr, int cmd)
memcpy(&port->settings, &new_line, size); /* Update settings */
pci200_set_iface(port);
sca_flush(port_to_card(port));
sca_flush(port->card);
return 0;
default:
......@@ -258,10 +242,8 @@ static void pci200_pci_remove_one(struct pci_dev *pdev)
card_t *card = pci_get_drvdata(pdev);
for (i = 0; i < 2; i++)
if (card->ports[i].card) {
struct net_device *dev = port_to_dev(&card->ports[i]);
unregister_hdlc_device(dev);
}
if (card->ports[i].card)
unregister_hdlc_device(card->ports[i].netdev);
if (card->irq)
free_irq(card->irq, card);
......@@ -276,10 +258,10 @@ static void pci200_pci_remove_one(struct pci_dev *pdev)
pci_release_regions(pdev);
pci_disable_device(pdev);
pci_set_drvdata(pdev, NULL);
if (card->ports[0].dev)
free_netdev(card->ports[0].dev);
if (card->ports[1].dev)
free_netdev(card->ports[1].dev);
if (card->ports[0].netdev)
free_netdev(card->ports[0].netdev);
if (card->ports[1].netdev)
free_netdev(card->ports[1].netdev);
kfree(card);
}
......@@ -296,12 +278,6 @@ static int __devinit pci200_pci_init_one(struct pci_dev *pdev,
u32 scaphys; /* SCA memory base */
u32 plxphys; /* PLX registers memory base */
#ifndef MODULE
static int printed_version;
if (!printed_version++)
printk(KERN_INFO "%s\n", version);
#endif
i = pci_enable_device(pdev);
if (i)
return i;
......@@ -320,9 +296,9 @@ static int __devinit pci200_pci_init_one(struct pci_dev *pdev,
return -ENOBUFS;
}
pci_set_drvdata(pdev, card);
card->ports[0].dev = alloc_hdlcdev(&card->ports[0]);
card->ports[1].dev = alloc_hdlcdev(&card->ports[1]);
if (!card->ports[0].dev || !card->ports[1].dev) {
card->ports[0].netdev = alloc_hdlcdev(&card->ports[0]);
card->ports[1].netdev = alloc_hdlcdev(&card->ports[1]);
if (!card->ports[0].netdev || !card->ports[1].netdev) {
printk(KERN_ERR "pci200syn: unable to allocate memory\n");
pci200_pci_remove_one(pdev);
return -ENOMEM;
......@@ -398,7 +374,7 @@ static int __devinit pci200_pci_init_one(struct pci_dev *pdev,
writew(readw(p) | 0x0040, p);
/* Allocate IRQ */
if (request_irq(pdev->irq, sca_intr, IRQF_SHARED, devname, card)) {
if (request_irq(pdev->irq, sca_intr, IRQF_SHARED, "pci200syn", card)) {
printk(KERN_WARNING "pci200syn: could not allocate IRQ%d.\n",
pdev->irq);
pci200_pci_remove_one(pdev);
......@@ -410,9 +386,9 @@ static int __devinit pci200_pci_init_one(struct pci_dev *pdev,
for (i = 0; i < 2; i++) {
port_t *port = &card->ports[i];
struct net_device *dev = port_to_dev(port);
struct net_device *dev = port->netdev;
hdlc_device *hdlc = dev_to_hdlc(dev);
port->phy_node = i;
port->chan = i;
spin_lock_init(&port->lock);
dev->irq = card->irq;
......@@ -426,6 +402,7 @@ static int __devinit pci200_pci_init_one(struct pci_dev *pdev,
hdlc->xmit = sca_xmit;
port->settings.clock_type = CLOCK_EXT;
port->card = card;
sca_init_port(port);
if (register_hdlc_device(dev)) {
printk(KERN_ERR "pci200syn: unable to register hdlc "
"device\n");
......@@ -433,10 +410,9 @@ static int __devinit pci200_pci_init_one(struct pci_dev *pdev,
pci200_pci_remove_one(pdev);
return -ENOBUFS;
}
sca_init_sync_port(port); /* Set up SCA memory */
printk(KERN_INFO "%s: PCI200SYN node %d\n",
dev->name, port->phy_node);
printk(KERN_INFO "%s: PCI200SYN channel %d\n",
dev->name, port->chan);
}
sca_flush(card);
......@@ -464,9 +440,6 @@ static struct pci_driver pci200_pci_driver = {
static int __init pci200_init_module(void)
{
#ifdef MODULE
printk(KERN_INFO "%s\n", version);
#endif
if (pci_clock_freq < 1000000 || pci_clock_freq > 80000000) {
printk(KERN_ERR "pci200syn: Invalid PCI clock frequency\n");
return -EINVAL;
......
drivers/net/wan/syncppp.c deleted 100644 → 0
View file @ f5f4cf08
/*
* NET3: A (fairly minimal) implementation of synchronous PPP for Linux
* as well as a CISCO HDLC implementation. See the copyright
* message below for the original source.
*
* This program is free software; you can redistribute it and/or
* modify it under the terms of the GNU General Public License
* as published by the Free Software Foundation; either version
* 2 of the license, or (at your option) any later version.
*
* Note however. This code is also used in a different form by FreeBSD.
* Therefore when making any non OS specific change please consider
* contributing it back to the original author under the terms
* below in addition.
* -- Alan
*
* Port for Linux-2.1 by Jan "Yenya" Kasprzak <kas@fi.muni.cz>
*/
/*
* Synchronous PPP/Cisco link level subroutines.
* Keepalive protocol implemented in both Cisco and PPP modes.
*
* Copyright (C) 1994 Cronyx Ltd.
* Author: Serge Vakulenko, <vak@zebub.msk.su>
*
* This software is distributed with NO WARRANTIES, not even the implied
* warranties for MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.
*
* Authors grant any other persons or organisations permission to use
* or modify this software as long as this message is kept with the software,
* all derivative works or modified versions.
*
* Version 1.9, Wed Oct 4 18:58:15 MSK 1995
*
* $Id: syncppp.c,v 1.18 2000/04/11 05:25:31 asj Exp $
*/
#undef DEBUG
#include <linux/module.h>
#include <linux/kernel.h>
#include <linux/errno.h>
#include <linux/init.h>
#include <linux/if_arp.h>
#include <linux/skbuff.h>
#include <linux/route.h>
#include <linux/netdevice.h>
#include <linux/inetdevice.h>
#include <linux/random.h>
#include <linux/pkt_sched.h>
#include <linux/spinlock.h>
#include <linux/rcupdate.h>
#include <net/net_namespace.h>
#include <net/syncppp.h>
#include <asm/byteorder.h>
#include <asm/uaccess.h>
#define MAXALIVECNT 6 /* max. alive packets */
#define PPP_ALLSTATIONS 0xff /* All-Stations broadcast address */
#define PPP_UI 0x03 /* Unnumbered Information */
#define PPP_IP 0x0021 /* Internet Protocol */
#define PPP_ISO 0x0023 /* ISO OSI Protocol */
#define PPP_XNS 0x0025 /* Xerox NS Protocol */
#define PPP_IPX 0x002b /* Novell IPX Protocol */
#define PPP_LCP 0xc021 /* Link Control Protocol */
#define PPP_IPCP 0x8021 /* Internet Protocol Control Protocol */
#define LCP_CONF_REQ 1 /* PPP LCP configure request */
#define LCP_CONF_ACK 2 /* PPP LCP configure acknowledge */
#define LCP_CONF_NAK 3 /* PPP LCP configure negative ack */
#define LCP_CONF_REJ 4 /* PPP LCP configure reject */
#define LCP_TERM_REQ 5 /* PPP LCP terminate request */
#define LCP_TERM_ACK 6 /* PPP LCP terminate acknowledge */
#define LCP_CODE_REJ 7 /* PPP LCP code reject */
#define LCP_PROTO_REJ 8 /* PPP LCP protocol reject */
#define LCP_ECHO_REQ 9 /* PPP LCP echo request */
#define LCP_ECHO_REPLY 10 /* PPP LCP echo reply */
#define LCP_DISC_REQ 11 /* PPP LCP discard request */
#define LCP_OPT_MRU 1 /* maximum receive unit */
#define LCP_OPT_ASYNC_MAP 2 /* async control character map */
#define LCP_OPT_AUTH_PROTO 3 /* authentication protocol */
#define LCP_OPT_QUAL_PROTO 4 /* quality protocol */
#define LCP_OPT_MAGIC 5 /* magic number */
#define LCP_OPT_RESERVED 6 /* reserved */
#define LCP_OPT_PROTO_COMP 7 /* protocol field compression */
#define LCP_OPT_ADDR_COMP 8 /* address/control field compression */
#define IPCP_CONF_REQ LCP_CONF_REQ /* PPP IPCP configure request */
#define IPCP_CONF_ACK LCP_CONF_ACK /* PPP IPCP configure acknowledge */
#define IPCP_CONF_NAK LCP_CONF_NAK /* PPP IPCP configure negative ack */
#define IPCP_CONF_REJ LCP_CONF_REJ /* PPP IPCP configure reject */
#define IPCP_TERM_REQ LCP_TERM_REQ /* PPP IPCP terminate request */
#define IPCP_TERM_ACK LCP_TERM_ACK /* PPP IPCP terminate acknowledge */
#define IPCP_CODE_REJ LCP_CODE_REJ /* PPP IPCP code reject */
#define CISCO_MULTICAST 0x8f /* Cisco multicast address */
#define CISCO_UNICAST 0x0f /* Cisco unicast address */
#define CISCO_KEEPALIVE 0x8035 /* Cisco keepalive protocol */
#define CISCO_ADDR_REQ 0 /* Cisco address request */
#define CISCO_ADDR_REPLY 1 /* Cisco address reply */
#define CISCO_KEEPALIVE_REQ 2 /* Cisco keepalive request */
struct ppp_header {
u8 address;
u8 control;
__be16 protocol;
};
#define PPP_HEADER_LEN sizeof (struct ppp_header)
struct lcp_header {
u8 type;
u8 ident;
__be16 len;
};
#define LCP_HEADER_LEN sizeof (struct lcp_header)
struct cisco_packet {
__be32 type;
__be32 par1;
__be32 par2;
__be16 rel;
__be16 time0;
__be16 time1;
};
#define CISCO_PACKET_LEN 18
#define CISCO_BIG_PACKET_LEN 20
static struct sppp *spppq;
static struct timer_list sppp_keepalive_timer;
static DEFINE_SPINLOCK(spppq_lock);
/* global xmit queue for sending packets while spinlock is held */
static struct sk_buff_head tx_queue;
static void sppp_keepalive (unsigned long dummy);
static void sppp_cp_send (struct sppp *sp, u16 proto, u8 type,
u8 ident, u16 len, void *data);
static void sppp_cisco_send (struct sppp *sp, int type, u32 par1, u32 par2);
static void sppp_lcp_input (struct sppp *sp, struct sk_buff *m);
static void sppp_cisco_input (struct sppp *sp, struct sk_buff *m);
static void sppp_ipcp_input (struct sppp *sp, struct sk_buff *m);
static void sppp_lcp_open (struct sppp *sp);
static void sppp_ipcp_open (struct sppp *sp);
static int sppp_lcp_conf_parse_options (struct sppp *sp, struct lcp_header *h,
int len, u32 *magic);
static void sppp_cp_timeout (unsigned long arg);
static char *sppp_lcp_type_name (u8 type);
static char *sppp_ipcp_type_name (u8 type);
static void sppp_print_bytes (u8 *p, u16 len);
static int debug;
/* Flush global outgoing packet queue to dev_queue_xmit().
*
* dev_queue_xmit() must be called with interrupts enabled
* which means it can't be called with spinlocks held.
* If a packet needs to be sent while a spinlock is held,
* then put the packet into tx_queue, and call sppp_flush_xmit()
* after spinlock is released.
*/
static void sppp_flush_xmit(void)
{
struct sk_buff *skb;
while ((skb = skb_dequeue(&tx_queue)) != NULL)
dev_queue_xmit(skb);
}
/*
* Interface down stub
*/
static void if_down(struct net_device *dev)
{
struct sppp *sp = (struct sppp *)sppp_of(dev);
sp->pp_link_state=SPPP_LINK_DOWN;
}
/*
* Timeout routine activations.
*/
static void sppp_set_timeout(struct sppp *p,int s)
{
if (! (p->pp_flags & PP_TIMO))
{
init_timer(&p->pp_timer);
p->pp_timer.function=sppp_cp_timeout;
p->pp_timer.expires=jiffies+s*HZ;
p->pp_timer.data=(unsigned long)p;
p->pp_flags |= PP_TIMO;
add_timer(&p->pp_timer);
}
}
static void sppp_clear_timeout(struct sppp *p)
{
if (p->pp_flags & PP_TIMO)
{
del_timer(&p->pp_timer);
p->pp_flags &= ~PP_TIMO;
}
}
/**
* sppp_input - receive and process a WAN PPP frame
* @skb: The buffer to process
* @dev: The device it arrived on
*
* This can be called directly by cards that do not have
* timing constraints but is normally called from the network layer
* after interrupt servicing to process frames queued via netif_rx().
*
* We process the options in the card. If the frame is destined for
* the protocol stacks then it requeues the frame for the upper level
* protocol. If it is a control from it is processed and discarded
* here.
*/
static void sppp_input (struct net_device *dev, struct sk_buff *skb)
{
struct ppp_header *h;
struct sppp *sp = (struct sppp *)sppp_of(dev);
unsigned long flags;
skb->dev=dev;
skb_reset_mac_header(skb);
if (!pskb_may_pull(skb, PPP_HEADER_LEN)) {
/* Too small packet, drop it. */
if (sp->pp_flags & PP_DEBUG)
printk (KERN_DEBUG "%s: input packet is too small, %d bytes\n",
dev->name, skb->len);
kfree_skb(skb);
return;
}
/* Get PPP header. */
h = (struct ppp_header *)skb->data;
skb_pull(skb,sizeof(struct ppp_header));
spin_lock_irqsave(&sp->lock, flags);
switch (h->address) {
default: /* Invalid PPP packet. */
goto invalid;
case PPP_ALLSTATIONS:
if (h->control != PPP_UI)
goto invalid;
if (sp->pp_flags & PP_CISCO) {
if (sp->pp_flags & PP_DEBUG)
printk (KERN_WARNING "%s: PPP packet in Cisco mode <0x%x 0x%x 0x%x>\n",
dev->name,
h->address, h->control, ntohs (h->protocol));
goto drop;
}
switch (ntohs (h->protocol)) {
default:
if (sp->lcp.state == LCP_STATE_OPENED)
sppp_cp_send (sp, PPP_LCP, LCP_PROTO_REJ,
++sp->pp_seq, skb->len + 2,
&h->protocol);
if (sp->pp_flags & PP_DEBUG)
printk (KERN_WARNING "%s: invalid input protocol <0x%x 0x%x 0x%x>\n",
dev->name,
h->address, h->control, ntohs (h->protocol));
goto drop;
case PPP_LCP:
sppp_lcp_input (sp, skb);
goto drop;
case PPP_IPCP:
if (sp->lcp.state == LCP_STATE_OPENED)
sppp_ipcp_input (sp, skb);
else
printk(KERN_DEBUG "IPCP when still waiting LCP finish.\n");
goto drop;
case PPP_IP:
if (sp->ipcp.state == IPCP_STATE_OPENED) {
if(sp->pp_flags&PP_DEBUG)
printk(KERN_DEBUG "Yow an IP frame.\n");
skb->protocol=htons(ETH_P_IP);
netif_rx(skb);
goto done;
}
break;
#ifdef IPX
case PPP_IPX:
/* IPX IPXCP not implemented yet */
if (sp->lcp.state == LCP_STATE_OPENED) {
skb->protocol=htons(ETH_P_IPX);
netif_rx(skb);
goto done;
}
break;
#endif
}
break;
case CISCO_MULTICAST:
case CISCO_UNICAST:
/* Don't check the control field here (RFC 1547). */
if (! (sp->pp_flags & PP_CISCO)) {
if (sp->pp_flags & PP_DEBUG)
printk (KERN_WARNING "%s: Cisco packet in PPP mode <0x%x 0x%x 0x%x>\n",
dev->name,
h->address, h->control, ntohs (h->protocol));
goto drop;
}
switch (ntohs (h->protocol)) {
default:
goto invalid;
case CISCO_KEEPALIVE:
sppp_cisco_input (sp, skb);
goto drop;
#ifdef CONFIG_INET
case ETH_P_IP:
skb->protocol=htons(ETH_P_IP);
netif_rx(skb);
goto done;
#endif
#ifdef CONFIG_IPX
case ETH_P_IPX:
skb->protocol=htons(ETH_P_IPX);
netif_rx(skb);
goto done;
#endif
}
break;
}
goto drop;
invalid:
if (sp->pp_flags & PP_DEBUG)
printk (KERN_WARNING "%s: invalid input packet <0x%x 0x%x 0x%x>\n",
dev->name, h->address, h->control, ntohs (h->protocol));
drop:
kfree_skb(skb);
done:
spin_unlock_irqrestore(&sp->lock, flags);
sppp_flush_xmit();
return;
}
/*
* Handle transmit packets.
*/
static int sppp_hard_header(struct sk_buff *skb,
struct net_device *dev, __u16 type,
const void *daddr, const void *saddr,
unsigned int len)
{
struct sppp *sp = (struct sppp *)sppp_of(dev);
struct ppp_header *h;
skb_push(skb,sizeof(struct ppp_header));
h=(struct ppp_header *)skb->data;
if(sp->pp_flags&PP_CISCO)
{
h->address = CISCO_UNICAST;
h->control = 0;
}
else
{
h->address = PPP_ALLSTATIONS;
h->control = PPP_UI;
}
if(sp->pp_flags & PP_CISCO)
{
h->protocol = htons(type);
}
else switch(type)
{
case ETH_P_IP:
h->protocol = htons(PPP_IP);
break;
case ETH_P_IPX:
h->protocol = htons(PPP_IPX);
break;
}
return sizeof(struct ppp_header);
}
static const struct header_ops sppp_header_ops = {
.create = sppp_hard_header,
};
/*
* Send keepalive packets, every 10 seconds.
*/
static void sppp_keepalive (unsigned long dummy)
{
struct sppp *sp;
unsigned long flags;
spin_lock_irqsave(&spppq_lock, flags);
for (sp=spppq; sp; sp=sp->pp_next)
{
struct net_device *dev = sp->pp_if;
/* Keepalive mode disabled or channel down? */
if (! (sp->pp_flags & PP_KEEPALIVE) ||
! (dev->flags & IFF_UP))
continue;
spin_lock(&sp->lock);
/* No keepalive in PPP mode if LCP not opened yet. */
if (! (sp->pp_flags & PP_CISCO) &&
sp->lcp.state != LCP_STATE_OPENED) {
spin_unlock(&sp->lock);
continue;
}
if (sp->pp_alivecnt == MAXALIVECNT) {
/* No keepalive packets got. Stop the interface. */
printk (KERN_WARNING "%s: protocol down\n", dev->name);
if_down (dev);
if (! (sp->pp_flags & PP_CISCO)) {
/* Shut down the PPP link. */
sp->lcp.magic = jiffies;
sp->lcp.state = LCP_STATE_CLOSED;
sp->ipcp.state = IPCP_STATE_CLOSED;
sppp_clear_timeout (sp);
/* Initiate negotiation. */
sppp_lcp_open (sp);
}
}
if (sp->pp_alivecnt <= MAXALIVECNT)
++sp->pp_alivecnt;
if (sp->pp_flags & PP_CISCO)
sppp_cisco_send (sp, CISCO_KEEPALIVE_REQ, ++sp->pp_seq,
sp->pp_rseq);
else if (sp->lcp.state == LCP_STATE_OPENED) {
__be32 nmagic = htonl (sp->lcp.magic);
sp->lcp.echoid = ++sp->pp_seq;
sppp_cp_send (sp, PPP_LCP, LCP_ECHO_REQ,
sp->lcp.echoid, 4, &nmagic);
}
spin_unlock(&sp->lock);
}
spin_unlock_irqrestore(&spppq_lock, flags);
sppp_flush_xmit();
sppp_keepalive_timer.expires=jiffies+10*HZ;
add_timer(&sppp_keepalive_timer);
}
/*
* Handle incoming PPP Link Control Protocol packets.
*/
static void sppp_lcp_input (struct sppp *sp, struct sk_buff *skb)
{
struct lcp_header *h;
struct net_device *dev = sp->pp_if;
int len = skb->len;
u8 *p, opt[6];
u32 rmagic = 0;
if (!pskb_may_pull(skb, sizeof(struct lcp_header))) {
if (sp->pp_flags & PP_DEBUG)
printk (KERN_WARNING "%s: invalid lcp packet length: %d bytes\n",
dev->name, len);
return;
}
h = (struct lcp_header *)skb->data;
skb_pull(skb,sizeof(struct lcp_header *));
if (sp->pp_flags & PP_DEBUG)
{
char state = '?';
switch (sp->lcp.state) {
case LCP_STATE_CLOSED: state = 'C'; break;
case LCP_STATE_ACK_RCVD: state = 'R'; break;
case LCP_STATE_ACK_SENT: state = 'S'; break;
case LCP_STATE_OPENED: state = 'O'; break;
}
printk (KERN_WARNING "%s: lcp input(%c): %d bytes <%s id=%xh len=%xh",
dev->name, state, len,
sppp_lcp_type_name (h->type), h->ident, ntohs (h->len));
if (len > 4)
sppp_print_bytes ((u8*) (h+1), len-4);
printk (">\n");
}
if (len > ntohs (h->len))
len = ntohs (h->len);
switch (h->type) {
default:
/* Unknown packet type -- send Code-Reject packet. */
sppp_cp_send (sp, PPP_LCP, LCP_CODE_REJ, ++sp->pp_seq,
skb->len, h);
break;
case LCP_CONF_REQ:
if (len < 4) {
if (sp->pp_flags & PP_DEBUG)
printk (KERN_DEBUG"%s: invalid lcp configure request packet length: %d bytes\n",
dev->name, len);
break;
}
if (len>4 && !sppp_lcp_conf_parse_options (sp, h, len, &rmagic))
goto badreq;
if (rmagic == sp->lcp.magic) {
/* Local and remote magics equal -- loopback? */
if (sp->pp_loopcnt >= MAXALIVECNT*5) {
printk (KERN_WARNING "%s: loopback\n",
dev->name);
sp->pp_loopcnt = 0;
if (dev->flags & IFF_UP) {
if_down (dev);
}
} else if (sp->pp_flags & PP_DEBUG)
printk (KERN_DEBUG "%s: conf req: magic glitch\n",
dev->name);
++sp->pp_loopcnt;
/* MUST send Conf-Nack packet. */
rmagic = ~sp->lcp.magic;
opt[0] = LCP_OPT_MAGIC;
opt[1] = sizeof (opt);
opt[2] = rmagic >> 24;
opt[3] = rmagic >> 16;
opt[4] = rmagic >> 8;
opt[5] = rmagic;
sppp_cp_send (sp, PPP_LCP, LCP_CONF_NAK,
h->ident, sizeof (opt), &opt);
badreq:
switch (sp->lcp.state) {
case LCP_STATE_OPENED:
/* Initiate renegotiation. */
sppp_lcp_open (sp);
/* fall through... */
case LCP_STATE_ACK_SENT:
/* Go to closed state. */
sp->lcp.state = LCP_STATE_CLOSED;
sp->ipcp.state = IPCP_STATE_CLOSED;
}
break;
}
/* Send Configure-Ack packet. */
sp->pp_loopcnt = 0;
if (sp->lcp.state != LCP_STATE_OPENED) {
sppp_cp_send (sp, PPP_LCP, LCP_CONF_ACK,
h->ident, len-4, h+1);
}
/* Change the state. */
switch (sp->lcp.state) {
case LCP_STATE_CLOSED:
sp->lcp.state = LCP_STATE_ACK_SENT;
break;
case LCP_STATE_ACK_RCVD:
sp->lcp.state = LCP_STATE_OPENED;
sppp_ipcp_open (sp);
break;
case LCP_STATE_OPENED:
/* Remote magic changed -- close session. */
sp->lcp.state = LCP_STATE_CLOSED;
sp->ipcp.state = IPCP_STATE_CLOSED;
/* Initiate renegotiation. */
sppp_lcp_open (sp);
/* Send ACK after our REQ in attempt to break loop */
sppp_cp_send (sp, PPP_LCP, LCP_CONF_ACK,
h->ident, len-4, h+1);
sp->lcp.state = LCP_STATE_ACK_SENT;
break;
}
break;
case LCP_CONF_ACK:
if (h->ident != sp->lcp.confid)
break;
sppp_clear_timeout (sp);
if ((sp->pp_link_state != SPPP_LINK_UP) &&
(dev->flags & IFF_UP)) {
/* Coming out of loopback mode. */
sp->pp_link_state=SPPP_LINK_UP;
printk (KERN_INFO "%s: protocol up\n", dev->name);
}
switch (sp->lcp.state) {
case LCP_STATE_CLOSED:
sp->lcp.state = LCP_STATE_ACK_RCVD;
sppp_set_timeout (sp, 5);
break;
case LCP_STATE_ACK_SENT:
sp->lcp.state = LCP_STATE_OPENED;
sppp_ipcp_open (sp);
break;
}
break;
case LCP_CONF_NAK:
if (h->ident != sp->lcp.confid)
break;
p = (u8*) (h+1);
if (len>=10 && p[0] == LCP_OPT_MAGIC && p[1] >= 4) {
rmagic = (u32)p[2] << 24 |
(u32)p[3] << 16 | p[4] << 8 | p[5];
if (rmagic == ~sp->lcp.magic) {
int newmagic;
if (sp->pp_flags & PP_DEBUG)
printk (KERN_DEBUG "%s: conf nak: magic glitch\n",
dev->name);
get_random_bytes(&newmagic, sizeof(newmagic));
sp->lcp.magic += newmagic;
} else
sp->lcp.magic = rmagic;
}
if (sp->lcp.state != LCP_STATE_ACK_SENT) {
/* Go to closed state. */
sp->lcp.state = LCP_STATE_CLOSED;
sp->ipcp.state = IPCP_STATE_CLOSED;
}
/* The link will be renegotiated after timeout,
* to avoid endless req-nack loop. */
sppp_clear_timeout (sp);
sppp_set_timeout (sp, 2);
break;
case LCP_CONF_REJ:
if (h->ident != sp->lcp.confid)
break;
sppp_clear_timeout (sp);
/* Initiate renegotiation. */
sppp_lcp_open (sp);
if (sp->lcp.state != LCP_STATE_ACK_SENT) {
/* Go to closed state. */
sp->lcp.state = LCP_STATE_CLOSED;
sp->ipcp.state = IPCP_STATE_CLOSED;
}
break;
case LCP_TERM_REQ:
sppp_clear_timeout (sp);
/* Send Terminate-Ack packet. */
sppp_cp_send (sp, PPP_LCP, LCP_TERM_ACK, h->ident, 0, NULL);
/* Go to closed state. */
sp->lcp.state = LCP_STATE_CLOSED;
sp->ipcp.state = IPCP_STATE_CLOSED;
/* Initiate renegotiation. */
sppp_lcp_open (sp);
break;
case LCP_TERM_ACK:
case LCP_CODE_REJ:
case LCP_PROTO_REJ:
/* Ignore for now. */
break;
case LCP_DISC_REQ:
/* Discard the packet. */
break;
case LCP_ECHO_REQ:
if (sp->lcp.state != LCP_STATE_OPENED)
break;
if (len < 8) {
if (sp->pp_flags & PP_DEBUG)
printk (KERN_WARNING "%s: invalid lcp echo request packet length: %d bytes\n",
dev->name, len);
break;
}
if (ntohl (*(__be32*)(h+1)) == sp->lcp.magic) {
/* Line loopback mode detected. */
printk (KERN_WARNING "%s: loopback\n", dev->name);
if_down (dev);
/* Shut down the PPP link. */
sp->lcp.state = LCP_STATE_CLOSED;
sp->ipcp.state = IPCP_STATE_CLOSED;
sppp_clear_timeout (sp);
/* Initiate negotiation. */
sppp_lcp_open (sp);
break;
}
*(__be32 *)(h+1) = htonl (sp->lcp.magic);
sppp_cp_send (sp, PPP_LCP, LCP_ECHO_REPLY, h->ident, len-4, h+1);
break;
case LCP_ECHO_REPLY:
if (h->ident != sp->lcp.echoid)
break;
if (len < 8) {
if (sp->pp_flags & PP_DEBUG)
printk (KERN_WARNING "%s: invalid lcp echo reply packet length: %d bytes\n",
dev->name, len);
break;
}
if (ntohl(*(__be32 *)(h+1)) != sp->lcp.magic)
sp->pp_alivecnt = 0;
break;
}
}
/*
* Handle incoming Cisco keepalive protocol packets.
*/
static void sppp_cisco_input (struct sppp *sp, struct sk_buff *skb)
{
struct cisco_packet *h;
struct net_device *dev = sp->pp_if;
if (!pskb_may_pull(skb, sizeof(struct cisco_packet))
|| (skb->len != CISCO_PACKET_LEN
&& skb->len != CISCO_BIG_PACKET_LEN)) {
if (sp->pp_flags & PP_DEBUG)
printk (KERN_WARNING "%s: invalid cisco packet length: %d bytes\n",
dev->name, skb->len);
return;
}
h = (struct cisco_packet *)skb->data;
skb_pull(skb, sizeof(struct cisco_packet*));
if (sp->pp_flags & PP_DEBUG)
printk (KERN_WARNING "%s: cisco input: %d bytes <%xh %xh %xh %xh %xh-%xh>\n",
dev->name, skb->len,
ntohl (h->type), h->par1, h->par2, h->rel,
h->time0, h->time1);
switch (ntohl (h->type)) {
default:
if (sp->pp_flags & PP_DEBUG)
printk (KERN_WARNING "%s: unknown cisco packet type: 0x%x\n",
dev->name, ntohl (h->type));
break;
case CISCO_ADDR_REPLY:
/* Reply on address request, ignore */
break;
case CISCO_KEEPALIVE_REQ:
sp->pp_alivecnt = 0;
sp->pp_rseq = ntohl (h->par1);
if (sp->pp_seq == sp->pp_rseq) {
/* Local and remote sequence numbers are equal.
* Probably, the line is in loopback mode. */
int newseq;
if (sp->pp_loopcnt >= MAXALIVECNT) {
printk (KERN_WARNING "%s: loopback\n",
dev->name);
sp->pp_loopcnt = 0;
if (dev->flags & IFF_UP) {
if_down (dev);
}
}
++sp->pp_loopcnt;
/* Generate new local sequence number */
get_random_bytes(&newseq, sizeof(newseq));
sp->pp_seq ^= newseq;
break;
}
sp->pp_loopcnt = 0;
if (sp->pp_link_state==SPPP_LINK_DOWN &&
(dev->flags & IFF_UP)) {
sp->pp_link_state=SPPP_LINK_UP;
printk (KERN_INFO "%s: protocol up\n", dev->name);
}
break;
case CISCO_ADDR_REQ:
/* Stolen from net/ipv4/devinet.c -- SIOCGIFADDR ioctl */
{
__be32 addr = 0, mask = htonl(~0U); /* FIXME: is the mask correct? */
#ifdef CONFIG_INET
struct in_device *in_dev;
struct in_ifaddr *ifa;
rcu_read_lock();
if ((in_dev = __in_dev_get_rcu(dev)) != NULL)
{
for (ifa=in_dev->ifa_list; ifa != NULL;
ifa=ifa->ifa_next) {
if (strcmp(dev->name, ifa->ifa_label) == 0)
{
addr = ifa->ifa_local;
mask = ifa->ifa_mask;
break;
}
}
}
rcu_read_unlock();
#endif
sppp_cisco_send (sp, CISCO_ADDR_REPLY, ntohl(addr), ntohl(mask));
break;
}
}
}
/*
* Send PPP LCP packet.
*/
static void sppp_cp_send (struct sppp *sp, u16 proto, u8 type,
u8 ident, u16 len, void *data)
{
struct ppp_header *h;
struct lcp_header *lh;
struct sk_buff *skb;
struct net_device *dev = sp->pp_if;
skb=alloc_skb(dev->hard_header_len+PPP_HEADER_LEN+LCP_HEADER_LEN+len,
GFP_ATOMIC);
if (skb==NULL)
return;
skb_reserve(skb,dev->hard_header_len);
h = (struct ppp_header *)skb_put(skb, sizeof(struct ppp_header));
h->address = PPP_ALLSTATIONS; /* broadcast address */
h->control = PPP_UI; /* Unnumbered Info */
h->protocol = htons (proto); /* Link Control Protocol */
lh = (struct lcp_header *)skb_put(skb, sizeof(struct lcp_header));
lh->type = type;
lh->ident = ident;
lh->len = htons (LCP_HEADER_LEN + len);
if (len)
memcpy(skb_put(skb,len),data, len);
if (sp->pp_flags & PP_DEBUG) {
printk (KERN_WARNING "%s: %s output <%s id=%xh len=%xh",
dev->name,
proto==PPP_LCP ? "lcp" : "ipcp",
proto==PPP_LCP ? sppp_lcp_type_name (lh->type) :
sppp_ipcp_type_name (lh->type), lh->ident,
ntohs (lh->len));
if (len)
sppp_print_bytes ((u8*) (lh+1), len);
printk (">\n");
}
/* Control is high priority so it doesn't get queued behind data */
skb->priority=TC_PRIO_CONTROL;
skb->dev = dev;
skb_queue_tail(&tx_queue, skb);
}
/*
* Send Cisco keepalive packet.
*/
static void sppp_cisco_send (struct sppp *sp, int type, u32 par1, u32 par2)
{
struct ppp_header *h;
struct cisco_packet *ch;
struct sk_buff *skb;
struct net_device *dev = sp->pp_if;
u32 t = jiffies * 1000/HZ;
skb=alloc_skb(dev->hard_header_len+PPP_HEADER_LEN+CISCO_PACKET_LEN,
GFP_ATOMIC);
if(skb==NULL)
return;
skb_reserve(skb, dev->hard_header_len);
h = (struct ppp_header *)skb_put (skb, sizeof(struct ppp_header));
h->address = CISCO_MULTICAST;
h->control = 0;
h->protocol = htons (CISCO_KEEPALIVE);
ch = (struct cisco_packet*)skb_put(skb, CISCO_PACKET_LEN);
ch->type = htonl (type);
ch->par1 = htonl (par1);
ch->par2 = htonl (par2);
ch->rel = htons(0xffff);
ch->time0 = htons ((u16) (t >> 16));
ch->time1 = htons ((u16) t);
if (sp->pp_flags & PP_DEBUG)
printk (KERN_WARNING "%s: cisco output: <%xh %xh %xh %xh %xh-%xh>\n",
dev->name, ntohl (ch->type), ch->par1,
ch->par2, ch->rel, ch->time0, ch->time1);
skb->priority=TC_PRIO_CONTROL;
skb->dev = dev;
skb_queue_tail(&tx_queue, skb);
}
/**
* sppp_close - close down a synchronous PPP or Cisco HDLC link
* @dev: The network device to drop the link of
*
* This drops the logical interface to the channel. It is not
* done politely as we assume we will also be dropping DTR. Any
* timeouts are killed.
*/
int sppp_close (struct net_device *dev)
{
struct sppp *sp = (struct sppp *)sppp_of(dev);
unsigned long flags;
spin_lock_irqsave(&sp->lock, flags);
sp->pp_link_state = SPPP_LINK_DOWN;
sp->lcp.state = LCP_STATE_CLOSED;
sp->ipcp.state = IPCP_STATE_CLOSED;
sppp_clear_timeout (sp);
spin_unlock_irqrestore(&sp->lock, flags);
return 0;
}
EXPORT_SYMBOL(sppp_close);
/**
* sppp_open - open a synchronous PPP or Cisco HDLC link
* @dev: Network device to activate
*
* Close down any existing synchronous session and commence
* from scratch. In the PPP case this means negotiating LCP/IPCP
* and friends, while for Cisco HDLC we simply need to start sending
* keepalives
*/
int sppp_open (struct net_device *dev)
{
struct sppp *sp = (struct sppp *)sppp_of(dev);
unsigned long flags;
sppp_close(dev);
spin_lock_irqsave(&sp->lock, flags);
if (!(sp->pp_flags & PP_CISCO)) {
sppp_lcp_open (sp);
}
sp->pp_link_state = SPPP_LINK_DOWN;
spin_unlock_irqrestore(&sp->lock, flags);
sppp_flush_xmit();
return 0;
}
EXPORT_SYMBOL(sppp_open);
/**
* sppp_reopen - notify of physical link loss
* @dev: Device that lost the link
*
* This function informs the synchronous protocol code that
* the underlying link died (for example a carrier drop on X.21)
*
* We increment the magic numbers to ensure that if the other end
* failed to notice we will correctly start a new session. It happens
* do to the nature of telco circuits is that you can lose carrier on
* one endonly.
*
* Having done this we go back to negotiating. This function may
* be called from an interrupt context.
*/
int sppp_reopen (struct net_device *dev)
{
struct sppp *sp = (struct sppp *)sppp_of(dev);
unsigned long flags;
sppp_close(dev);
spin_lock_irqsave(&sp->lock, flags);
if (!(sp->pp_flags & PP_CISCO))
{
sp->lcp.magic = jiffies;
++sp->pp_seq;
sp->lcp.state = LCP_STATE_CLOSED;
sp->ipcp.state = IPCP_STATE_CLOSED;
/* Give it a moment for the line to settle then go */
sppp_set_timeout (sp, 1);
}
sp->pp_link_state=SPPP_LINK_DOWN;
spin_unlock_irqrestore(&sp->lock, flags);
return 0;
}
EXPORT_SYMBOL(sppp_reopen);
/**
* sppp_change_mtu - Change the link MTU
* @dev: Device to change MTU on
* @new_mtu: New MTU
*
* Change the MTU on the link. This can only be called with
* the link down. It returns an error if the link is up or
* the mtu is out of range.
*/
static int sppp_change_mtu(struct net_device *dev, int new_mtu)
{
if(new_mtu<128||new_mtu>PPP_MTU||(dev->flags&IFF_UP))
return -EINVAL;
dev->mtu=new_mtu;
return 0;
}
/**
* sppp_do_ioctl - Ioctl handler for ppp/hdlc
* @dev: Device subject to ioctl
* @ifr: Interface request block from the user
* @cmd: Command that is being issued
*
* This function handles the ioctls that may be issued by the user
* to control the settings of a PPP/HDLC link. It does both busy
* and security checks. This function is intended to be wrapped by
* callers who wish to add additional ioctl calls of their own.
*/
int sppp_do_ioctl(struct net_device *dev, struct ifreq *ifr, int cmd)
{
struct sppp *sp = (struct sppp *)sppp_of(dev);
if(dev->flags&IFF_UP)
return -EBUSY;
if(!capable(CAP_NET_ADMIN))
return -EPERM;
switch(cmd)
{
case SPPPIOCCISCO:
sp->pp_flags|=PP_CISCO;
dev->type = ARPHRD_HDLC;
break;
case SPPPIOCPPP:
sp->pp_flags&=~PP_CISCO;
dev->type = ARPHRD_PPP;
break;
case SPPPIOCDEBUG:
sp->pp_flags&=~PP_DEBUG;
if(ifr->ifr_flags)
sp->pp_flags|=PP_DEBUG;
break;
case SPPPIOCGFLAGS:
if(copy_to_user(ifr->ifr_data, &sp->pp_flags, sizeof(sp->pp_flags)))
return -EFAULT;
break;
case SPPPIOCSFLAGS:
if(copy_from_user(&sp->pp_flags, ifr->ifr_data, sizeof(sp->pp_flags)))
return -EFAULT;
break;
default:
return -EINVAL;
}
return 0;
}
EXPORT_SYMBOL(sppp_do_ioctl);
/**
* sppp_attach - attach synchronous PPP/HDLC to a device
* @pd: PPP device to initialise
*
* This initialises the PPP/HDLC support on an interface. At the
* time of calling the dev element must point to the network device
* that this interface is attached to. The interface should not yet
* be registered.
*/
void sppp_attach(struct ppp_device *pd)
{
struct net_device *dev = pd->dev;
struct sppp *sp = &pd->sppp;
unsigned long flags;
/* Make sure embedding is safe for sppp_of */
BUG_ON(sppp_of(dev) != sp);
spin_lock_irqsave(&spppq_lock, flags);
/* Initialize keepalive handler. */
if (! spppq)
{
init_timer(&sppp_keepalive_timer);
sppp_keepalive_timer.expires=jiffies+10*HZ;
sppp_keepalive_timer.function=sppp_keepalive;
add_timer(&sppp_keepalive_timer);
}
/* Insert new entry into the keepalive list. */
sp->pp_next = spppq;
spppq = sp;
spin_unlock_irqrestore(&spppq_lock, flags);
sp->pp_loopcnt = 0;
sp->pp_alivecnt = 0;
sp->pp_seq = 0;
sp->pp_rseq = 0;
sp->pp_flags = PP_KEEPALIVE|PP_CISCO|debug;/*PP_DEBUG;*/
sp->lcp.magic = 0;
sp->lcp.state = LCP_STATE_CLOSED;
sp->ipcp.state = IPCP_STATE_CLOSED;
sp->pp_if = dev;
spin_lock_init(&sp->lock);
/*
* Device specific setup. All but interrupt handler and
* hard_start_xmit.
*/
dev->header_ops = &sppp_header_ops;
dev->tx_queue_len = 10;
dev->type = ARPHRD_HDLC;
dev->addr_len = 0;
dev->hard_header_len = sizeof(struct ppp_header);
dev->mtu = PPP_MTU;
/*
* These 4 are callers but MUST also call sppp_ functions
*/
dev->do_ioctl = sppp_do_ioctl;
#if 0
dev->get_stats = NULL; /* Let the driver override these */
dev->open = sppp_open;
dev->stop = sppp_close;
#endif
dev->change_mtu = sppp_change_mtu;
dev->flags = IFF_MULTICAST|IFF_POINTOPOINT|IFF_NOARP;
}
EXPORT_SYMBOL(sppp_attach);
/**
* sppp_detach - release PPP resources from a device
* @dev: Network device to release
*
* Stop and free up any PPP/HDLC resources used by this
* interface. This must be called before the device is
* freed.
*/
void sppp_detach (struct net_device *dev)
{
struct sppp **q, *p, *sp = (struct sppp *)sppp_of(dev);
unsigned long flags;
spin_lock_irqsave(&spppq_lock, flags);
/* Remove the entry from the keepalive list. */
for (q = &spppq; (p = *q); q = &p->pp_next)
if (p == sp) {
*q = p->pp_next;
break;
}
/* Stop keepalive handler. */
if (! spppq)
del_timer(&sppp_keepalive_timer);
sppp_clear_timeout (sp);
spin_unlock_irqrestore(&spppq_lock, flags);
}
EXPORT_SYMBOL(sppp_detach);
/*
* Analyze the LCP Configure-Request options list
* for the presence of unknown options.
* If the request contains unknown options, build and
* send Configure-reject packet, containing only unknown options.
*/
static int
sppp_lcp_conf_parse_options (struct sppp *sp, struct lcp_header *h,
int len, u32 *magic)
{
u8 *buf, *r, *p;
int rlen;
len -= 4;
buf = r = kmalloc (len, GFP_ATOMIC);
if (! buf)
return (0);
p = (void*) (h+1);
for (rlen=0; len>1 && p[1]; len-=p[1], p+=p[1]) {
switch (*p) {
case LCP_OPT_MAGIC:
/* Magic number -- extract. */
if (len >= 6 && p[1] == 6) {
*magic = (u32)p[2] << 24 |
(u32)p[3] << 16 | p[4] << 8 | p[5];
continue;
}
break;
case LCP_OPT_ASYNC_MAP:
/* Async control character map -- check to be zero. */
if (len >= 6 && p[1] == 6 && ! p[2] && ! p[3] &&
! p[4] && ! p[5])
continue;
break;
case LCP_OPT_MRU:
/* Maximum receive unit -- always OK. */
continue;
default:
/* Others not supported. */
break;
}
/* Add the option to rejected list. */
memcpy(r, p, p[1]);
r += p[1];
rlen += p[1];
}
if (rlen)
sppp_cp_send (sp, PPP_LCP, LCP_CONF_REJ, h->ident, rlen, buf);
kfree(buf);
return (rlen == 0);
}
static void sppp_ipcp_input (struct sppp *sp, struct sk_buff *skb)
{
struct lcp_header *h;
struct net_device *dev = sp->pp_if;
int len = skb->len;
if (!pskb_may_pull(skb, sizeof(struct lcp_header))) {
if (sp->pp_flags & PP_DEBUG)
printk (KERN_WARNING "%s: invalid ipcp packet length: %d bytes\n",
dev->name, len);
return;
}
h = (struct lcp_header *)skb->data;
skb_pull(skb,sizeof(struct lcp_header));
if (sp->pp_flags & PP_DEBUG) {
printk (KERN_WARNING "%s: ipcp input: %d bytes <%s id=%xh len=%xh",
dev->name, len,
sppp_ipcp_type_name (h->type), h->ident, ntohs (h->len));
if (len > 4)
sppp_print_bytes ((u8*) (h+1), len-4);
printk (">\n");
}
if (len > ntohs (h->len))
len = ntohs (h->len);
switch (h->type) {
default:
/* Unknown packet type -- send Code-Reject packet. */
sppp_cp_send (sp, PPP_IPCP, IPCP_CODE_REJ, ++sp->pp_seq, len, h);
break;
case IPCP_CONF_REQ:
if (len < 4) {
if (sp->pp_flags & PP_DEBUG)
printk (KERN_WARNING "%s: invalid ipcp configure request packet length: %d bytes\n",
dev->name, len);
return;
}
if (len > 4) {
sppp_cp_send (sp, PPP_IPCP, LCP_CONF_REJ, h->ident,
len-4, h+1);
switch (sp->ipcp.state) {
case IPCP_STATE_OPENED:
/* Initiate renegotiation. */
sppp_ipcp_open (sp);
/* fall through... */
case IPCP_STATE_ACK_SENT:
/* Go to closed state. */
sp->ipcp.state = IPCP_STATE_CLOSED;
}
} else {
/* Send Configure-Ack packet. */
sppp_cp_send (sp, PPP_IPCP, IPCP_CONF_ACK, h->ident,
0, NULL);
/* Change the state. */
if (sp->ipcp.state == IPCP_STATE_ACK_RCVD)
sp->ipcp.state = IPCP_STATE_OPENED;
else
sp->ipcp.state = IPCP_STATE_ACK_SENT;
}
break;
case IPCP_CONF_ACK:
if (h->ident != sp->ipcp.confid)
break;
sppp_clear_timeout (sp);
switch (sp->ipcp.state) {
case IPCP_STATE_CLOSED:
sp->ipcp.state = IPCP_STATE_ACK_RCVD;
sppp_set_timeout (sp, 5);
break;
case IPCP_STATE_ACK_SENT:
sp->ipcp.state = IPCP_STATE_OPENED;
break;
}
break;
case IPCP_CONF_NAK:
case IPCP_CONF_REJ:
if (h->ident != sp->ipcp.confid)
break;
sppp_clear_timeout (sp);
/* Initiate renegotiation. */
sppp_ipcp_open (sp);
if (sp->ipcp.state != IPCP_STATE_ACK_SENT)
/* Go to closed state. */
sp->ipcp.state = IPCP_STATE_CLOSED;
break;
case IPCP_TERM_REQ:
/* Send Terminate-Ack packet. */
sppp_cp_send (sp, PPP_IPCP, IPCP_TERM_ACK, h->ident, 0, NULL);
/* Go to closed state. */
sp->ipcp.state = IPCP_STATE_CLOSED;
/* Initiate renegotiation. */
sppp_ipcp_open (sp);
break;
case IPCP_TERM_ACK:
/* Ignore for now. */
case IPCP_CODE_REJ:
/* Ignore for now. */
break;
}
}
static void sppp_lcp_open (struct sppp *sp)
{
char opt[6];
if (! sp->lcp.magic)
sp->lcp.magic = jiffies;
opt[0] = LCP_OPT_MAGIC;
opt[1] = sizeof (opt);
opt[2] = sp->lcp.magic >> 24;
opt[3] = sp->lcp.magic >> 16;
opt[4] = sp->lcp.magic >> 8;
opt[5] = sp->lcp.magic;
sp->lcp.confid = ++sp->pp_seq;
sppp_cp_send (sp, PPP_LCP, LCP_CONF_REQ, sp->lcp.confid,
sizeof (opt), &opt);
sppp_set_timeout (sp, 2);
}
static void sppp_ipcp_open (struct sppp *sp)
{
sp->ipcp.confid = ++sp->pp_seq;
sppp_cp_send (sp, PPP_IPCP, IPCP_CONF_REQ, sp->ipcp.confid, 0, NULL);
sppp_set_timeout (sp, 2);
}
/*
* Process PPP control protocol timeouts.
*/
static void sppp_cp_timeout (unsigned long arg)
{
struct sppp *sp = (struct sppp*) arg;
unsigned long flags;
spin_lock_irqsave(&sp->lock, flags);
sp->pp_flags &= ~PP_TIMO;
if (! (sp->pp_if->flags & IFF_UP) || (sp->pp_flags & PP_CISCO)) {
spin_unlock_irqrestore(&sp->lock, flags);
return;
}
switch (sp->lcp.state) {
case LCP_STATE_CLOSED:
/* No ACK for Configure-Request, retry. */
sppp_lcp_open (sp);
break;
case LCP_STATE_ACK_RCVD:
/* ACK got, but no Configure-Request for peer, retry. */
sppp_lcp_open (sp);
sp->lcp.state = LCP_STATE_CLOSED;
break;
case LCP_STATE_ACK_SENT:
/* ACK sent but no ACK for Configure-Request, retry. */
sppp_lcp_open (sp);
break;
case LCP_STATE_OPENED:
/* LCP is already OK, try IPCP. */
switch (sp->ipcp.state) {
case IPCP_STATE_CLOSED:
/* No ACK for Configure-Request, retry. */
sppp_ipcp_open (sp);
break;
case IPCP_STATE_ACK_RCVD:
/* ACK got, but no Configure-Request for peer, retry. */
sppp_ipcp_open (sp);
sp->ipcp.state = IPCP_STATE_CLOSED;
break;
case IPCP_STATE_ACK_SENT:
/* ACK sent but no ACK for Configure-Request, retry. */
sppp_ipcp_open (sp);
break;
case IPCP_STATE_OPENED:
/* IPCP is OK. */
break;
}
break;
}
spin_unlock_irqrestore(&sp->lock, flags);
sppp_flush_xmit();
}
static char *sppp_lcp_type_name (u8 type)
{
static char buf [8];
switch (type) {
case LCP_CONF_REQ: return ("conf-req");
case LCP_CONF_ACK: return ("conf-ack");
case LCP_CONF_NAK: return ("conf-nack");
case LCP_CONF_REJ: return ("conf-rej");
case LCP_TERM_REQ: return ("term-req");
case LCP_TERM_ACK: return ("term-ack");
case LCP_CODE_REJ: return ("code-rej");
case LCP_PROTO_REJ: return ("proto-rej");
case LCP_ECHO_REQ: return ("echo-req");
case LCP_ECHO_REPLY: return ("echo-reply");
case LCP_DISC_REQ: return ("discard-req");
}
sprintf (buf, "%xh", type);
return (buf);
}
static char *sppp_ipcp_type_name (u8 type)
{
static char buf [8];
switch (type) {
case IPCP_CONF_REQ: return ("conf-req");
case IPCP_CONF_ACK: return ("conf-ack");
case IPCP_CONF_NAK: return ("conf-nack");
case IPCP_CONF_REJ: return ("conf-rej");
case IPCP_TERM_REQ: return ("term-req");
case IPCP_TERM_ACK: return ("term-ack");
case IPCP_CODE_REJ: return ("code-rej");
}
sprintf (buf, "%xh", type);
return (buf);
}
static void sppp_print_bytes (u_char *p, u16 len)
{
printk (" %x", *p++);
while (--len > 0)
printk ("-%x", *p++);
}
/**
* sppp_rcv - receive and process a WAN PPP frame
* @skb: The buffer to process
* @dev: The device it arrived on
* @p: Unused
* @orig_dev: Unused
*
* Protocol glue. This drives the deferred processing mode the poorer
* cards use. This can be called directly by cards that do not have
* timing constraints but is normally called from the network layer
* after interrupt servicing to process frames queued via netif_rx.
*/
static int sppp_rcv(struct sk_buff *skb, struct net_device *dev, struct packet_type *p, struct net_device *orig_dev)
{
if (dev_net(dev) != &init_net) {
kfree_skb(skb);
return 0;
}
if ((skb = skb_share_check(skb, GFP_ATOMIC)) == NULL)
return NET_RX_DROP;
sppp_input(dev,skb);
return 0;
}
static struct packet_type sppp_packet_type = {
.type = __constant_htons(ETH_P_WAN_PPP),
.func = sppp_rcv,
};
static char banner[] __initdata =
KERN_INFO "Cronyx Ltd, Synchronous PPP and CISCO HDLC (c) 1994\n"
KERN_INFO "Linux port (c) 1998 Building Number Three Ltd & "
"Jan \"Yenya\" Kasprzak.\n";
static int __init sync_ppp_init(void)
{
if(debug)
debug=PP_DEBUG;
printk(banner);
skb_queue_head_init(&tx_queue);
dev_add_pack(&sppp_packet_type);
return 0;
}
static void __exit sync_ppp_cleanup(void)
{
dev_remove_pack(&sppp_packet_type);
}
module_init(sync_ppp_init);
module_exit(sync_ppp_cleanup);
module_param(debug, int, 0);
MODULE_LICENSE("GPL");
include/net/syncppp.h deleted 100644 → 0
View file @ f5f4cf08
/*
* Defines for synchronous PPP/Cisco link level subroutines.
*
* Copyright (C) 1994 Cronyx Ltd.
* Author: Serge Vakulenko, <vak@zebub.msk.su>
*
* This software is distributed with NO WARRANTIES, not even the implied
* warranties for MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.
*
* Authors grant any other persons or organizations permission to use
* or modify this software as long as this message is kept with the software,
* all derivative works or modified versions.
*
* Version 1.7, Wed Jun 7 22:12:02 MSD 1995
*
*
*
*/
#ifndef _SYNCPPP_H_
#define _SYNCPPP_H_ 1
#ifdef __KERNEL__
struct slcp {
u16 state; /* state machine */
u32 magic; /* local magic number */
u_char echoid; /* id of last keepalive echo request */
u_char confid; /* id of last configuration request */
};
struct sipcp {
u16 state; /* state machine */
u_char confid; /* id of last configuration request */
};
struct sppp
{
struct sppp * pp_next; /* next interface in keepalive list */
u32 pp_flags; /* use Cisco protocol instead of PPP */
u16 pp_alivecnt; /* keepalive packets counter */
u16 pp_loopcnt; /* loopback detection counter */
u32 pp_seq; /* local sequence number */
u32 pp_rseq; /* remote sequence number */
struct slcp lcp; /* LCP params */
struct sipcp ipcp; /* IPCP params */
struct timer_list pp_timer;
struct net_device *pp_if;
char pp_link_state; /* Link status */
spinlock_t lock;
};
struct ppp_device
{
struct net_device *dev; /* Network device pointer */
struct sppp sppp; /* Synchronous PPP */
};
static inline struct sppp *sppp_of(struct net_device *dev)
{
struct ppp_device **ppp = dev->ml_priv;
BUG_ON((*ppp)->dev != dev);
return &(*ppp)->sppp;
}
#define PP_KEEPALIVE 0x01 /* use keepalive protocol */
#define PP_CISCO 0x02 /* use Cisco protocol instead of PPP */
#define PP_TIMO 0x04 /* cp_timeout routine active */
#define PP_DEBUG 0x08
#define PPP_MTU 1500 /* max. transmit unit */
#define LCP_STATE_CLOSED 0 /* LCP state: closed (conf-req sent) */
#define LCP_STATE_ACK_RCVD 1 /* LCP state: conf-ack received */
#define LCP_STATE_ACK_SENT 2 /* LCP state: conf-ack sent */
#define LCP_STATE_OPENED 3 /* LCP state: opened */
#define IPCP_STATE_CLOSED 0 /* IPCP state: closed (conf-req sent) */
#define IPCP_STATE_ACK_RCVD 1 /* IPCP state: conf-ack received */
#define IPCP_STATE_ACK_SENT 2 /* IPCP state: conf-ack sent */
#define IPCP_STATE_OPENED 3 /* IPCP state: opened */
#define SPPP_LINK_DOWN 0 /* link down - no keepalive */
#define SPPP_LINK_UP 1 /* link is up - keepalive ok */
void sppp_attach (struct ppp_device *pd);
void sppp_detach (struct net_device *dev);
int sppp_do_ioctl (struct net_device *dev, struct ifreq *ifr, int cmd);
struct sk_buff *sppp_dequeue (struct net_device *dev);
int sppp_isempty (struct net_device *dev);
void sppp_flush (struct net_device *dev);
int sppp_open (struct net_device *dev);
int sppp_reopen (struct net_device *dev);
int sppp_close (struct net_device *dev);
#endif
#define SPPPIOCCISCO (SIOCDEVPRIVATE)
#define SPPPIOCPPP (SIOCDEVPRIVATE+1)
#define SPPPIOCDEBUG (SIOCDEVPRIVATE+2)
#define SPPPIOCSFLAGS (SIOCDEVPRIVATE+3)
#define SPPPIOCGFLAGS (SIOCDEVPRIVATE+4)
#endif /* _SYNCPPP_H_ */
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