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/*
* Copyright 1996 The Australian National University.
* Copyright 1996 Fujitsu Laboratories Limited
*
* This software may be distributed under the terms of the Gnu
* Public License version 2 or later
*/
/*
* $Id: apfddi.c,v 1.6 1996/12/18 01:45:51 tridge Exp $
*
* Network interface definitions for AP1000 fddi device.
*/
#include <linux/kernel.h>
#include <linux/sched.h>
#include <linux/interrupt.h>
#include <linux/fs.h>
#include <linux/types.h>
#include <linux/string.h>
#include <linux/socket.h>
#include <linux/errno.h>
#include <linux/fcntl.h>
#include <linux/in.h>
#include <linux/if_ether.h> /* For the statistics structure. */
#include <linux/netdevice.h>
#include <linux/if_arp.h>
#include <asm/system.h>
#include <asm/segment.h>
#include <asm/io.h>
#include <linux/inet.h>
#include <linux/netdevice.h>
#include <linux/etherdevice.h>
#include <linux/skbuff.h>
#include <net/sock.h>
#include <asm/ap1000/apservice.h>
#include <asm/ap1000/apreg.h>
#include <asm/irq.h>
#include <net/arp.h>
#include "apfddi.h"
#include "smt-types.h"
#include "mac.h"
#include "plc.h"
#include "am79c830.h"
#include "apfddi-reg.h"
volatile struct formac *mac;
volatile struct plc *plc;
volatile int *csr0;
volatile int *csr1;
volatile int *buffer_mem;
volatile int *fifo;
#define APFDDI_DEBUG 0
#define APFDDI_IRQ 7
#define T(x) (-SECS_TO_FDDI_TIME(x))
struct plc_info plc_info = {
pt_s, /* port_type */
T(1.6e-3), /* c_min */
T(50e-6), /* tl_min */
T(5e-3), /* tb_min */
T(100e-3), /* t_out */
T(50e-3), /* lc_short */
T(500e-3), /* lc_medium */
T(5.0), /* lc_long */
T(50.0), /* lc_extended */
T(3.5e-3), /* t_scrub */
T(1.3e-3), /* ns_max */
};
struct mac_info mac_info = {
T(165e-3), /* tmax */
T(3.5e-3), /* tvx */
T(20e-3), /* treq */
{ 0x42, 0x59 }, /* s_address */
{ 0x42, 0x59, 0x10, 0x76, 0x88, 0x82 }, /* l_address */
{ 0 }, /* s_group_adrs */
{ 0 }, /* l_group_adrs */
0, /* rcv_own_frames */
1, /* only_good_frames */
};
u_char fddi_bitrev[256] = {
0x00, 0x80, 0x40, 0xc0, 0x20, 0xa0, 0x60, 0xe0,
0x10, 0x90, 0x50, 0xd0, 0x30, 0xb0, 0x70, 0xf0,
0x08, 0x88, 0x48, 0xc8, 0x28, 0xa8, 0x68, 0xe8,
0x18, 0x98, 0x58, 0xd8, 0x38, 0xb8, 0x78, 0xf8,
0x04, 0x84, 0x44, 0xc4, 0x24, 0xa4, 0x64, 0xe4,
0x14, 0x94, 0x54, 0xd4, 0x34, 0xb4, 0x74, 0xf4,
0x0c, 0x8c, 0x4c, 0xcc, 0x2c, 0xac, 0x6c, 0xec,
0x1c, 0x9c, 0x5c, 0xdc, 0x3c, 0xbc, 0x7c, 0xfc,
0x02, 0x82, 0x42, 0xc2, 0x22, 0xa2, 0x62, 0xe2,
0x12, 0x92, 0x52, 0xd2, 0x32, 0xb2, 0x72, 0xf2,
0x0a, 0x8a, 0x4a, 0xca, 0x2a, 0xaa, 0x6a, 0xea,
0x1a, 0x9a, 0x5a, 0xda, 0x3a, 0xba, 0x7a, 0xfa,
0x06, 0x86, 0x46, 0xc6, 0x26, 0xa6, 0x66, 0xe6,
0x16, 0x96, 0x56, 0xd6, 0x36, 0xb6, 0x76, 0xf6,
0x0e, 0x8e, 0x4e, 0xce, 0x2e, 0xae, 0x6e, 0xee,
0x1e, 0x9e, 0x5e, 0xde, 0x3e, 0xbe, 0x7e, 0xfe,
0x01, 0x81, 0x41, 0xc1, 0x21, 0xa1, 0x61, 0xe1,
0x11, 0x91, 0x51, 0xd1, 0x31, 0xb1, 0x71, 0xf1,
0x09, 0x89, 0x49, 0xc9, 0x29, 0xa9, 0x69, 0xe9,
0x19, 0x99, 0x59, 0xd9, 0x39, 0xb9, 0x79, 0xf9,
0x05, 0x85, 0x45, 0xc5, 0x25, 0xa5, 0x65, 0xe5,
0x15, 0x95, 0x55, 0xd5, 0x35, 0xb5, 0x75, 0xf5,
0x0d, 0x8d, 0x4d, 0xcd, 0x2d, 0xad, 0x6d, 0xed,
0x1d, 0x9d, 0x5d, 0xdd, 0x3d, 0xbd, 0x7d, 0xfd,
0x03, 0x83, 0x43, 0xc3, 0x23, 0xa3, 0x63, 0xe3,
0x13, 0x93, 0x53, 0xd3, 0x33, 0xb3, 0x73, 0xf3,
0x0b, 0x8b, 0x4b, 0xcb, 0x2b, 0xab, 0x6b, 0xeb,
0x1b, 0x9b, 0x5b, 0xdb, 0x3b, 0xbb, 0x7b, 0xfb,
0x07, 0x87, 0x47, 0xc7, 0x27, 0xa7, 0x67, 0xe7,
0x17, 0x97, 0x57, 0xd7, 0x37, 0xb7, 0x77, 0xf7,
0x0f, 0x8f, 0x4f, 0xcf, 0x2f, 0xaf, 0x6f, 0xef,
0x1f, 0x9f, 0x5f, 0xdf, 0x3f, 0xbf, 0x7f, 0xff,
};
/* XXX our hardware address, canonical bit order */
static u_char apfddi_saddr[6] = { 0x42, 0x9a, 0x08, 0x6e, 0x11, 0x41 };
struct device *apfddi_device = NULL;
struct net_device_stats *apfddi_stats = NULL;
volatile struct apfddi_queue *apfddi_queue_top = NULL;
void map_regs(void)
{
unsigned long reg_base_addr = 0xfbf00000;
mac = (volatile struct formac *) (reg_base_addr + FORMAC);
plc = (volatile struct plc *) (reg_base_addr + PLC);
csr0 = (volatile int *) (reg_base_addr + CSR0);
csr1 = (volatile int *) (reg_base_addr + CSR1);
buffer_mem = (volatile int *) (reg_base_addr + BUFFER_MEM);
fifo = (volatile int *) (reg_base_addr + FIFO);
}
int ring_op;
void apfddi_startup(void)
{
int reason;
#if APFDDI_DEBUG
printk("In apfddi_startup\n");
#endif
*csr0 = CS0_LED0;
ring_op = 0;
if (*csr1 & 0xf078) {
*csr1 = CS1_RESET_MAC | CS1_RESET_FIFO;
*csr1 = 0;
reason = 1;
printk("resetting after power-on\n");
} else {
*csr1 = CS1_RESET_FIFO;
*csr1 = 0;
reason = plc_inited(&plc_info);
if (reason)
printk("resetting: plc reason %d\n", reason);
}
if (reason) {
#if APFDDI_DEBUG
printk("Calling plc_init\n");
#endif
plc_init(&plc_info);
#if APFDDI_DEBUG
printk("Calling mac_init\n");
#endif
mac_init(&mac_info);
*csr0 |= CS0_LED1;
pc_start(loop_none);
} else {
*csr0 |= CS0_LED2 | CS0_LED1;
reason = mac_inited(&mac_info);
if (reason) {
printk("resetting mac: reason %d\n", reason);
mac_init(&mac_info);
mac_reset(loop_none);
mac_claim();
} else {
ring_op = 1;
*csr0 &= ~(CS0_LED0 | CS0_LED1 | CS0_LED2);
}
}
}
void apfddi_off(void)
{
*csr0 &= ~CS0_LED1;
pc_stop();
}
void apfddi_sleep(void)
{
mac_sleep();
plc_sleep();
}
void apfddi_poll(void)
{
if (*csr0 & CS0_PHY_IRQ)
plc_poll();
if (*csr0 & CS0_MAC_IRQ)
mac_poll();
}
void set_cf_join(int on)
{
if (on) {
#if APFDDI_DEBUG
printk("apfddi: joined the ring!\n");
#endif
mac_reset(loop_none);
*csr0 |= CS0_LED2;
mac_claim();
} else {
mac_disable();
ring_op = 0;
*csr0 = (*csr0 & ~CS0_LED2) | CS0_LED1 | CS0_LED0;
}
}
void set_ring_op(int up)
{
ring_op = up;
if (up) {
#if APFDDI_DEBUG
printk("apfddi: ring operational!\n");
#endif
*csr0 &= ~(CS0_LED2 | CS0_LED1 | CS0_LED0);
} else
*csr0 |= CS0_LED2 | CS0_LED1 | CS0_LED0;
}
void rmt_event(int st)
{
if (st & (S2_BEACON_STATE|S2_MULTIPLE_DA|S2_TOKEN_ERR
|S2_DUPL_CLAIM|S2_TRT_EXP_RECOV)) {
printk("st2 = %x\n", st);
}
}
int apfddi_init(struct device *dev);
static void apfddi_interrupt(int irq, void *dev_id, struct pt_regs *regs);
static int apfddi_xmit(struct sk_buff *skb, struct device *dev);
int apfddi_rx(struct mac_buf *mbuf);
static struct net_device_stats *apfddi_get_stats(struct device *dev);
#if APFDDI_DEBUG
void dump_packet(char *action, char *buf, int len, int seq);
#endif
/*
* Create FDDI header for an arbitrary protocol layer
*
* saddr=NULL means use device source address (always will anyway)
* daddr=NULL means leave destination address (eg unresolved arp)
*/
static int apfddi_hard_header(struct sk_buff *skb, struct device *dev,
unsigned short type, void *daddr,
void *saddr, unsigned len)
{
struct fddi_header *fh;
struct llc_header *lh;
u_char *base_header;
u_char *fd_daddr = (u_char *)daddr;
int i;
#if APFDDI_DEBUG
printk("In apfddi_hard_header\n");
#endif
if (skb == NULL) {
printk("Null skb in apfddi_hard_header... returning...\n");
return 0;
}
switch(type) {
case ETH_P_IP:
#if APFDDI_DEBUG
printk("apfddi_hard_header: Processing IP packet\n");
#endif
break;
case ETH_P_ARP:
#if APFDDI_DEBUG
printk("apfddi_hard_header: Processing ARP packet\n");
#endif
break;
case ETH_P_RARP:
#if APFDDI_DEBUG
printk("apfddi_hard_header: Processing RARP packet\n");
#endif
break;
default:
printk("apfddi_hard_header: I don't understand protocol %d (0x%x)\n",
type, type);
apfddi_stats->tx_errors++;
return 0;
}
base_header = (u_char *)skb_push(skb, FDDI_HARDHDR_LEN-4);
if (base_header == NULL) {
printk("apfddi_hard_header: Memory squeeze, dropping packet.\n");
apfddi_stats->tx_dropped++;
return 0;
}
fh = (struct fddi_header *)(base_header + 3);
lh = (struct llc_header *)((char *)fh + FDDI_HDRLEN);
lh->llc_dsap = lh->llc_ssap = LLC_SNAP_LSAP;
lh->snap_control = LLC_UI;
lh->snap_org_code[0] = 0;
lh->snap_org_code[1] = 0;
lh->snap_org_code[2] = 0;
lh->snap_ether_type = htons(type);
#if APFDDI_DEBUG
printk("snap_ether_type is %d (0x%x)\n", lh->snap_ether_type,
lh->snap_ether_type);
#endif
fh->fddi_fc = FDDI_FC_LLC;
/*
* Fill in the source address.
*/
for (i = 0; i < 6; i++)
fh->fddi_shost[i] = fddi_bitrev[apfddi_saddr[i]];
/*
* Fill in the destination address.
*/
if (daddr) {
#if APFDDI_DEBUG
printk("daddr is: ");
#endif
for (i = 0; i < 6; i++) {
fh->fddi_dhost[i] = fddi_bitrev[fd_daddr[i]];
#if APFDDI_DEBUG
printk("%x(%x):",fh->fddi_dhost[i], fd_daddr[i]);
#endif
}
#if APFDDI_DEBUG
printk("\n");
#endif
return(FDDI_HARDHDR_LEN-4);
}
else {
#if APFDDI_DEBUG
printk("apfddi_hard_header, daddr was NULL\n");
#endif
return -(FDDI_HARDHDR_LEN-4);
}
}
/*
* Rebuild the FDDI header. This is called after an ARP (or in future
* other address resolution) has completed on this sk_buff. We now let
* ARP fill in the other fields.
*/
static int apfddi_rebuild_header(void *buff, struct device *dev,
unsigned long raddr, struct sk_buff *skb)
{
int i, status;
struct fddi_header *fh = (struct fddi_header *)(buff+3);
#if APFDDI_DEBUG
printk("In apfddi_rebuild_header, dev is %x apfddi_device is %x\n", dev,
apfddi_device);
printk("rebuild header for fc 0x%x\n", fh->fddi_fc);
printk("dest address is:\n");
for (i = 0; i < 6; i++) printk("%x:", fh->fddi_dhost[i]);
#endif
status = arp_find(raddr, skb) ? 1 : 0;
if (!status) {
#if APFDDI_DEBUG
printk("dest address is now:\n");
for (i = 0; i < 6; i++) printk("%x:", fh->fddi_dhost[i]);
printk("status is %d\n", status);
#endif
/*
* Bit reverse the dest_address.
*/
for (i = 0; i < 6; i++)
fh->fddi_dhost[i] = fddi_bitrev[fh->fddi_dhost[i]];
}
#if APFDDI_DEBUG
printk("\n");
#endif
return(status);
}
static int apfddi_set_mac_address(struct device *dev, void *addr)
{
#if APFDDI_DEBUG
printk("In apfddi_set_mac_address\n");
#endif
return (0);
}
static void apfddi_set_multicast_list(struct device *dev)
{
#if APFDDI_DEBUG
printk("In apfddi_set_multicast_list\n");
#endif
}
static int apfddi_do_ioctl(struct device *dev, struct ifreq *ifr, int cmd)
{
#if APFDDI_DEBUG
printk("In apfddi_do_ioctl\n");
#endif
return (0);
}
static int apfddi_set_config(struct device *dev, struct ifmap *map)
{
#if APFDDI_DEBUG
printk("In apfddi_set_config\n");
#endif
return (0);
}
/*
* Opening the fddi device through ifconfig.
*/
int apfddi_open(struct device *dev)
{
static int already_run = 0;
unsigned flags;
int res;
if (already_run) {
apfddi_startup();
*csr0 |= CS0_INT_ENABLE;
return 0;
}
already_run = 1;
map_regs();
apfddi_startup();
save_flags(flags); cli();
if ((res = request_irq(APFDDI_IRQ, apfddi_interrupt, SA_INTERRUPT,
"apfddi", dev))) {
printk("Failed to install apfddi handler error=%d\n", res);
restore_flags(flags);
return(0);
}
enable_irq(APFDDI_IRQ);
restore_flags(flags);
#if APFDDI_DEBUG
printk("Installed apfddi interrupt handler\n");
#endif
*csr0 |= CS0_INT_ENABLE;
#if APFDDI_DEBUG
printk("Enabled fddi interrupts\n");
#endif
return 0;
}
/*
* Stop the fddi device through ifconfig.
*/
int apfddi_stop(struct device *dev)
{
*csr0 &= ~CS0_INT_ENABLE;
apfddi_sleep();
return 0;
}
/*
* Initialise fddi network interface.
*/
int apfddi_init(struct device *dev)
{
int i;
/*
* Check if this thing has already been initialised.
*/
if (apfddi_device != NULL)
return -ENODEV;
printk("apfddi_init(): Initialising fddi interface\n");
apfddi_device = dev;
dev->open = apfddi_open;
dev->stop = apfddi_stop;
dev->hard_start_xmit = apfddi_xmit;
dev->get_stats = apfddi_get_stats;
dev->priv = kmalloc(sizeof(struct net_device_stats), GFP_ATOMIC);
if (dev->priv == NULL)
return -ENOMEM;
memset(dev->priv, 0, sizeof(struct net_device_stats));
apfddi_stats = (struct net_device_stats *)apfddi_device->priv;
/* Initialise the fddi device structure */
for (i = 0; i < DEV_NUMBUFFS; i++)
skb_queue_head_init(&dev->buffs[i]);
dev->hard_header = apfddi_hard_header;
dev->rebuild_header = apfddi_rebuild_header;
dev->set_mac_address = apfddi_set_mac_address;
dev->header_cache_update = NULL;
dev->do_ioctl = apfddi_do_ioctl;
dev->set_config = apfddi_set_config;
dev->set_multicast_list = apfddi_set_multicast_list;
dev->type = ARPHRD_ETHER;
dev->hard_header_len = FDDI_HARDHDR_LEN;
dev->mtu = FDDIMTU;
dev->addr_len = 6;
memcpy(dev->dev_addr, apfddi_saddr, sizeof(apfddi_saddr));
dev->tx_queue_len = 100; /* XXX What should this be? */
dev->irq = APFDDI_IRQ;
memset(dev->broadcast, 0xFF, ETH_ALEN);
return(0);
}
static void apfddi_interrupt(int irq, void *dev_id, struct pt_regs *regs)
{
#if APFDDI_DEBUG
static int times = 0;
#endif
unsigned flags;
save_flags(flags); cli();
#if APFDDI_DEBUG
printk("In apfddi_interrupt irq %d dev_id %p times %d\n",
irq, dev_id, ++times);
#endif
apfddi_poll();
restore_flags(flags);
}
#if APFDDI_DEBUG
static char *flagbits[8] = {
"fin", "syn", "rst", "push", "ack", "urg", "6", "7"
};
void dump_packet(action, buf, len, seq)
char *action, *buf;
int len, seq;
{
int i, flags;
char *sep;
printk("%s packet %d of %d bytes at %d:\n", action, seq,
len, jiffies);
printk(" from %x to %x pktid=%d ttl=%d pcol=%d len=%d\n",
*(long *)(buf+12), *(long *)(buf+16), *(u_short *)(buf+4),
*(unsigned char *)(buf+8), buf[9], *(u_short *)(buf+2));
if( buf[9] == 6 || buf[9] == 17 ){
/* TCP or UDP */
printk(" sport=%d dport=%d",
*(u_short *)(buf+20), *(u_short *)(buf+22));
if( buf[9] == 6 ){
printk(" seq=%d ack=%d win=%d flags=<",
*(long *)(buf+24), *(long *)(buf+28),
*(unsigned short *)(buf+34));
flags = buf[33];
sep = "";
for (i = 7; i >= 0; --i) {
if (flags & (1 << i)) {
printk("%s%s", sep, flagbits[i]);
sep = "+";
}
}
printk(">");
}
printk("\n");
}
}
#endif
#if APFDDI_DEBUG
static void apfddi_print_frame(struct sk_buff *skb)
{
int i;
struct llc_header *lh;
static int seq = 0;
#if 0
printk("skb->len is %d\n", skb->len);
printk("fc is 0x%x\n", *(u_char *)(skb->data+3));
printk("dest address is:\n");
for (i = 0; i < 6; i++) {
printk("%x:", fddi_bitrev[*(u_char *)(skb->data+4+i)]);
}
printk("\n");
printk("source address is:\n");
for (i = 0; i < 6; i++) {
printk("%x:", fddi_bitrev[*(u_char *)(skb->data+10+i)]);
}
printk("\n");
#endif
lh = (struct llc_header *)(skb->data+16);
#if 0
printk("llc_dsp %d llc_ssap %d snap_control %d org_code [0]=%d [1]=%d [2]=%d ether_type=%d\n",
lh->llc_dsap, lh->llc_ssap, lh->snap_control,
lh->snap_org_code[0], lh->snap_org_code[1], lh->snap_org_code[2],
lh->snap_ether_type);
#endif
if (lh->snap_ether_type == ETH_P_IP)
dump_packet("apfddi_xmit:", skb->data+24, skb->len-24, seq++);
}
#endif
/*
* Transmitting packet over FDDI.
*/
static int apfddi_xmit(struct sk_buff *skb, struct device *dev)
{
unsigned long flags;
#if APFDDI_DEBUG
printk("In apfddi_xmit\n");
#endif
/*
* Check there is some work to do.
*/
if (skb == NULL || dev == NULL)
return(0);
#if APFDDI_DEBUG
printk("skb address is for apfddi 0x%x\n", skb);
#endif
/*
* Check lock variable.
*/
save_flags(flags); cli();
if (dev->tbusy != 0) {
restore_flags(flags);
printk("apfddi_xmit: device busy\n");
apfddi_stats->tx_errors++;
return 1;
}
restore_flags(flags);
dev->tbusy = 1;
dev->trans_start = jiffies;
skb->mac.raw = skb->data;
/*
* Append packet onto send queue.
*/
if (mac_queue_append(skb)) {
/*
* No memory.
*/
return 1;
}
/*
* Process packet queue.
*/
mac_process();
apfddi_stats->tx_packets++;
dev->tbusy = 0;
return 0;
}
#if APFDDI_DEBUG
void print_mbuf(struct mac_buf *mbuf)
{
printk("mac %p length=%d ptr=%p wraplen=%d wrapptr=%x fr_start=%d fr_end=%d\n",
mbuf, mbuf->length, mbuf->ptr, mbuf->wraplen, mbuf->wrapptr,
mbuf->fr_start, mbuf->fr_end);
}
#endif
/*
* Return statistics of fddi driver.
*/
static struct net_device_stats *apfddi_get_stats(struct device *dev)
{
return((struct net_device_stats *)dev->priv);
}
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