/*
* Amiga Linux/m68k Ariadne Ethernet Driver
*
* © Copyright 1995 by Geert Uytterhoeven
* (Geert.Uytterhoeven@cs.kuleuven.ac.be)
* Peter De Schrijver
* (Peter.DeSchrijver@linux.cc.kuleuven.ac.be)
*
* ----------------------------------------------------------------------------------
*
* This program is based on
*
* lance.c: An AMD LANCE ethernet driver for linux.
* Written 1993-94 by Donald Becker.
*
* Am79C960: PCnet(tm)-ISA Single-Chip Ethernet Controller
* Advanced Micro Devices
* Publication #16907, Rev. B, Amendment/0, May 1994
*
* MC68230: Parallel Interface/Timer (PI/T)
* Motorola Semiconductors, December, 1983
*
* ----------------------------------------------------------------------------------
*
* This file is subject to the terms and conditions of the GNU General Public
* License. See the file COPYING in the main directory of the Linux
* distribution for more details.
*
* ----------------------------------------------------------------------------------
*
* The Ariadne is a Zorro-II board made by Village Tronic. It contains:
*
* - an Am79C960 PCnet-ISA Single-Chip Ethernet Controller with both
* 10BASE-2 (thin coax) and 10BASE-T (UTP) connectors
*
* - an MC68230 Parallel Interface/Timer configured as 2 parallel ports
*/
#include <linux/module.h>
#include <linux/stddef.h>
#include <linux/kernel.h>
#include <linux/sched.h>
#include <linux/string.h>
#include <linux/ptrace.h>
#include <linux/errno.h>
#include <linux/ioport.h>
#include <linux/malloc.h>
#include <linux/netdevice.h>
#include <linux/etherdevice.h>
#include <linux/interrupt.h>
#include <linux/skbuff.h>
#include <asm/bitops.h>
#include <asm/amigaints.h>
#include <asm/amigahw.h>
#include <asm/zorro.h>
#include <asm/bootinfo.h>
#include <asm/io.h>
#include <asm/irq.h>
#include "ariadne.h"
#ifdef ARIADNE_DEBUG
int ariadne_debug = ARIADNE_DEBUG;
#else
int ariadne_debug = 1;
#endif
/*
* Macros to Fix Endianness problems
*/
/* Swap the Bytes in a WORD */
#define swapw(x) (((x>>8)&0x00ff)|((x<<8)&0xff00))
/* Get the Low BYTE in a WORD */
#define lowb(x) (x&0xff)
/* Get the Swapped High WORD in a LONG */
#define swhighw(x) ((((x)>>8)&0xff00)|(((x)>>24)&0x00ff))
/* Get the Swapped Low WORD in a LONG */
#define swloww(x) ((((x)<<8)&0xff00)|(((x)>>8)&0x00ff))
/*
* Transmit/Receive Ring Definitions
*/
#define TX_RING_SIZE 5
#define RX_RING_SIZE 16
#define PKT_BUF_SIZE 1520
/*
* Private Device Data
*/
struct ariadne_private {
struct AriadneBoard *board;
struct TDRE *tx_ring[TX_RING_SIZE];
struct RDRE *rx_ring[RX_RING_SIZE];
u_short *tx_buff[TX_RING_SIZE];
u_short *rx_buff[RX_RING_SIZE];
int cur_tx, cur_rx; /* The next free ring entry */
int dirty_tx; /* The ring entries to be free()ed. */
struct enet_statistics stats;
char tx_full;
unsigned long lock;
int key;
};
/*
* Structure Created in the Ariadne's RAM Buffer
*/
struct lancedata {
struct TDRE tx_ring[TX_RING_SIZE];
struct RDRE rx_ring[RX_RING_SIZE];
u_short tx_buff[TX_RING_SIZE][PKT_BUF_SIZE/sizeof(u_short)];
u_short rx_buff[RX_RING_SIZE][PKT_BUF_SIZE/sizeof(u_short)];
};
static int ariadne_open(struct device *dev);
static void ariadne_init_ring(struct device *dev);
static int ariadne_start_xmit(struct sk_buff *skb, struct device *dev);
static int ariadne_rx(struct device *dev);
static void ariadne_interrupt(int irq, struct pt_regs *fp, void *data);
static int ariadne_close(struct device *dev);
static struct enet_statistics *ariadne_get_stats(struct device *dev);
#ifdef HAVE_MULTICAST
static void set_multicast_list(struct device *dev);
#endif
static void memcpyw(u_short *dest, u_short *src, int len)
{
while (len >= 2) {
*(dest++) = *(src++);
len -= 2;
}
if (len == 1)
*dest = (*(u_char *)src)<<8;
}
int ariadne_probe(struct device *dev)
{
int key;
struct ConfigDev *cd;
u_long board;
struct ariadne_private *priv;
/* Ethernet is part 0, Parallel is part 1 */
if ((key = zorro_find(MANUF_VILLAGE_TRONIC, PROD_ARIADNE, 0, 0))) {
cd = zorro_get_board(key);
if ((board = (u_long)cd->cd_BoardAddr)) {
dev->dev_addr[0] = 0x00;
dev->dev_addr[1] = 0x60;
dev->dev_addr[2] = 0x30;
dev->dev_addr[3] = (cd->cd_Rom.er_SerialNumber>>16)&0xff;
dev->dev_addr[4] = (cd->cd_Rom.er_SerialNumber>>8)&0xff;
dev->dev_addr[5] = cd->cd_Rom.er_SerialNumber&0xff;
printk("%s: Ariadne at 0x%08lx, Ethernet Address "
"%02x:%02x:%02x:%02x:%02x:%02x\n", dev->name, board,
dev->dev_addr[0], dev->dev_addr[1], dev->dev_addr[2],
dev->dev_addr[3], dev->dev_addr[4], dev->dev_addr[5]);
init_etherdev(dev, 0);
dev->priv = kmalloc(sizeof(struct ariadne_private), GFP_KERNEL);
priv = (struct ariadne_private *)dev->priv;
memset(priv, 0, sizeof(struct ariadne_private));
priv->board = (struct AriadneBoard *)ZTWO_VADDR(board);
priv->key = key;
dev->open = &ariadne_open;
dev->stop = &ariadne_close;
dev->hard_start_xmit = &ariadne_start_xmit;
dev->get_stats = &ariadne_get_stats;
dev->set_multicast_list = &set_multicast_list;
zorro_config_board(key, 0);
return(0);
}
}
return(ENODEV);
}
static int ariadne_open(struct device *dev)
{
struct ariadne_private *priv = (struct ariadne_private *)dev->priv;
struct AriadneBoard *board = priv->board;
struct lancedata *lancedata;
u_short in;
u_long version;
/* Reset the LANCE */
in = board->Lance.Reset;
/* Stop the LANCE */
board->Lance.RAP = CSR0; /* PCnet-ISA Controller Status */
board->Lance.RDP = STOP;
/* Check the LANCE version */
board->Lance.RAP = CSR88; /* Chip ID */
version = swapw(board->Lance.RDP);
board->Lance.RAP = CSR89; /* Chip ID */
version |= swapw(board->Lance.RDP)<<16;
if ((version & 0x00000fff) != 0x00000003) {
printk("ariadne_open: Couldn't find AMD Ethernet Chip\n");
return(-EAGAIN);
}
if ((version & 0x0ffff000) != 0x00003000) {
printk("ariadne_open: Couldn't find Am79C960 (Wrong part number = %ld)\n",
(version & 0x0ffff000)>>12);
return(-EAGAIN);
}
#if 0
printk("ariadne_open: Am79C960 (PCnet-ISA) Revision %ld\n",
(version & 0xf0000000)>>28);
#endif
ariadne_init_ring(dev);
/* Miscellaneous Stuff */
board->Lance.RAP = CSR3; /* Interrupt Masks and Deferral Control */
board->Lance.RDP = 0x0000;
board->Lance.RAP = CSR4; /* Test and Features Control */
board->Lance.RDP = DPOLL|APAD_XMT|MFCOM|RCVCCOM|TXSTRTM|JABM;
/* Set the Multicast Table */
board->Lance.RAP = CSR8; /* Logical Address Filter, LADRF[15:0] */
board->Lance.RDP = 0x0000;
board->Lance.RAP = CSR9; /* Logical Address Filter, LADRF[31:16] */
board->Lance.RDP = 0x0000;
board->Lance.RAP = CSR10; /* Logical Address Filter, LADRF[47:32] */
board->Lance.RDP = 0x0000;
board->Lance.RAP = CSR11; /* Logical Address Filter, LADRF[63:48] */
board->Lance.RDP = 0x0000;
/* Set the Ethernet Hardware Address */
board->Lance.RAP = CSR12; /* Physical Address Register, PADR[15:0] */
board->Lance.RDP = ((u_short *)&dev->dev_addr[0])[0];
board->Lance.RAP = CSR13; /* Physical Address Register, PADR[31:16] */
board->Lance.RDP = ((u_short *)&dev->dev_addr[0])[1];
board->Lance.RAP = CSR14; /* Physical Address Register, PADR[47:32] */
board->Lance.RDP = ((u_short *)&dev->dev_addr[0])[2];
/* Set the Init Block Mode */
board->Lance.RAP = CSR15; /* Mode Register */
board->Lance.RDP = 0x0000;
lancedata = (struct lancedata *)offsetof(struct AriadneBoard, RAM);
/* Set the Transmit Descriptor Ring Pointer */
board->Lance.RAP = CSR30; /* Base Address of Transmit Ring */
board->Lance.RDP = swloww((u_long)&lancedata->tx_ring);
board->Lance.RAP = CSR31; /* Base Address of transmit Ring */
board->Lance.RDP = swhighw((u_long)&lancedata->tx_ring);
/* Set the Receive Descriptor Ring Pointer */
board->Lance.RAP = CSR24; /* Base Address of Receive Ring */
board->Lance.RDP = swloww((u_long)&lancedata->rx_ring);
board->Lance.RAP = CSR25; /* Base Address of Receive Ring */
board->Lance.RDP = swhighw((u_long)&lancedata->rx_ring);
/* Set the Number of RX and TX Ring Entries */
board->Lance.RAP = CSR76; /* Receive Ring Length */
board->Lance.RDP = swapw(((u_short)-RX_RING_SIZE));
board->Lance.RAP = CSR78; /* Transmit Ring Length */
board->Lance.RDP = swapw(((u_short)-TX_RING_SIZE));
/* Enable Media Interface Port Auto Select (10BASE-2/10BASE-T) */
board->Lance.RAP = ISACSR2; /* Miscellaneous Configuration */
board->Lance.IDP = ASEL;
/* LED Control */
board->Lance.RAP = ISACSR5; /* LED1 Status */
board->Lance.IDP = PSE|XMTE;
board->Lance.RAP = ISACSR6; /* LED2 Status */
board->Lance.IDP = PSE|COLE;
board->Lance.RAP = ISACSR7; /* LED3 Status */
board->Lance.IDP = PSE|RCVE;
dev->tbusy = 0;
dev->interrupt = 0;
dev->start = 1;
if (!add_isr(IRQ_AMIGA_PORTS, ariadne_interrupt, 0, dev,
"Ariadne Ethernet"))
return(-EAGAIN);
board->Lance.RAP = CSR0; /* PCnet-ISA Controller Status */
board->Lance.RDP = INEA|STRT;
MOD_INC_USE_COUNT;
return(0);
}
static void ariadne_init_ring(struct device *dev)
{
struct ariadne_private *priv = (struct ariadne_private *)dev->priv;
struct AriadneBoard *board = priv->board;
struct lancedata *lancedata; /* LANCE point of view */
struct lancedata *alancedata; /* Amiga point of view */
int i;
priv->lock = 0, priv->tx_full = 0;
priv->cur_rx = priv->cur_tx = 0;
priv->dirty_tx = 0;
lancedata = (struct lancedata *)offsetof(struct AriadneBoard, RAM);
alancedata = (struct lancedata *)board->RAM;
/* Set up TX Ring */
for (i = 0; i < TX_RING_SIZE; i++) {
alancedata->tx_ring[i].TMD0 = swloww((u_long)lancedata->tx_buff[i]);
alancedata->tx_ring[i].TMD1 = swhighw((u_long)lancedata->tx_buff[i])|TF_STP|TF_ENP;
alancedata->tx_ring[i].TMD2 = swapw((u_short)-PKT_BUF_SIZE);
alancedata->tx_ring[i].TMD3 = 0;
priv->tx_ring[i] = &alancedata->tx_ring[i];
priv->tx_buff[i] = alancedata->tx_buff[i];
#if 0
printk("TX Entry %2d @ 0x%08x (LANCE 0x%08x), Buf @ 0x%08x (LANCE 0x%08x)\n",
i, (int)&alancedata->tx_ring[i], (int)&lancedata->tx_ring[i],
(int)alancedata->tx_buff[i], (int)lancedata->tx_buff[i]);
#endif
}
/* Set up RX Ring */
for (i = 0; i < RX_RING_SIZE; i++) {
alancedata->rx_ring[i].RMD0 = swloww((u_long)lancedata->rx_buff[i]);
alancedata->rx_ring[i].RMD1 = swhighw((u_long)lancedata->rx_buff[i])|RF_OWN;
alancedata->rx_ring[i].RMD2 = swapw((u_short)-PKT_BUF_SIZE);
alancedata->rx_ring[i].RMD3 = 0x0000;
priv->rx_ring[i] = &alancedata->rx_ring[i];
priv->rx_buff[i] = alancedata->rx_buff[i];
#if 0
printk("RX Entry %2d @ 0x%08x (LANCE 0x%08x), Buf @ 0x%08x (LANCE 0x%08x)\n",
i, (int)&alancedata->rx_ring[i], (int)&lancedata->rx_ring[i],
(int)alancedata->rx_buff[i], (int)lancedata->rx_buff[i]);
#endif
}
}
static int ariadne_close(struct device *dev)
{
struct ariadne_private *priv = (struct ariadne_private *)dev->priv;
struct AriadneBoard *board = priv->board;
dev->start = 0;
dev->tbusy = 1;
board->Lance.RAP = CSR112; /* Missed Frame Count */
priv->stats.rx_missed_errors = swapw(board->Lance.RDP);
board->Lance.RAP = CSR0; /* PCnet-ISA Controller Status */
if (ariadne_debug > 1) {
printk("%s: Shutting down ethercard, status was %2.2x.\n", dev->name,
board->Lance.RDP);
printk("%s: %d packets missed\n", dev->name,
priv->stats.rx_missed_errors);
}
/* We stop the LANCE here -- it occasionally polls memory if we don't. */
board->Lance.RDP = STOP;
remove_isr(IRQ_AMIGA_PORTS, ariadne_interrupt, dev);
MOD_DEC_USE_COUNT;
return(0);
}
static void ariadne_interrupt(int irq, struct pt_regs *fp, void *data)
{
struct device *dev = (struct device *)data;
struct ariadne_private *priv;
struct AriadneBoard *board;
int csr0, boguscnt = 10;
if (dev == NULL) {
printk("ariadne_interrupt(): irq for unknown device.\n");
return;
}
priv = (struct ariadne_private *)dev->priv;
board = priv->board;
board->Lance.RAP = CSR0; /* PCnet-ISA Controller Status */
if (!(board->Lance.RDP & INTR)) /* Check if any interrupt has been
return; generated by the board. */
if (dev->interrupt)
printk("%s: Re-entering the interrupt handler.\n", dev->name);
dev->interrupt = 1;
while ((csr0 = board->Lance.RDP) & (ERR|RINT|TINT) && --boguscnt >= 0) {
/* Acknowledge all of the current interrupt sources ASAP. */
board->Lance.RDP = csr0 & ~(INEA|TDMD|STOP|STRT|INIT);
#if 0
if (ariadne_debug > 5) {
printk("%s: interrupt csr0=%#2.2x new csr=%#2.2x.", dev->name,
csr0, board->Lance.RDP);
printk("[");
if (csr0 & INTR)
printk(" INTR");
if (csr0 & INEA)
printk(" INEA");
if (csr0 & RXON)
printk(" RXON");
if (csr0 & TXON)
printk(" TXON");
if (csr0 & TDMD)
printk(" TDMD");
if (csr0 & STOP)
printk(" STOP");
if (csr0 & STRT)
printk(" STRT");
if (csr0 & INIT)
printk(" INIT");
if (csr0 & ERR)
printk(" ERR");
if (csr0 & BABL)
printk(" BABL");
if (csr0 & CERR)
printk(" CERR");
if (csr0 & MISS)
printk(" MISS");
if (csr0 & MERR)
printk(" MERR");
if (csr0 & RINT)
printk(" RINT");
if (csr0 & TINT)
printk(" TINT");
if (csr0 & IDON)
printk(" IDON");
printk(" ]\n");
}
#endif
if (csr0 & RINT) /* Rx interrupt */
ariadne_rx(dev);
if (csr0 & TINT) { /* Tx-done interrupt */
int dirty_tx = priv->dirty_tx;
while (dirty_tx < priv->cur_tx) {
int entry = dirty_tx % TX_RING_SIZE;
int status = lowb(priv->tx_ring[entry]->TMD1);
if (status & TF_OWN)
break; /* It still hasn't been Txed */
priv->tx_ring[entry]->TMD1 &= 0xff00;
if (status & TF_ERR) {
/* There was an major error, log it. */
int err_status = priv->tx_ring[entry]->TMD3;
priv->stats.tx_errors++;
if (err_status & EF_RTRY)
priv->stats.tx_aborted_errors++;
if (err_status & EF_LCAR)
priv->stats.tx_carrier_errors++;
if (err_status & EF_LCOL)
priv->stats.tx_window_errors++;
if (err_status & EF_UFLO) {
/* Ackk! On FIFO errors the Tx unit is turned off! */
priv->stats.tx_fifo_errors++;
/* Remove this verbosity later! */
printk("%s: Tx FIFO error! Status %4.4x.\n", dev->name,
csr0);
/* Restart the chip. */
board->Lance.RDP = STRT;
}
} else {
if (status & (TF_MORE|TF_ONE))
priv->stats.collisions++;
priv->stats.tx_packets++;
}
dirty_tx++;
}
#ifndef final_version
if (priv->cur_tx - dirty_tx >= TX_RING_SIZE) {
printk("out-of-sync dirty pointer, %d vs. %d, full=%d.\n",
dirty_tx, priv->cur_tx, priv->tx_full);
dirty_tx += TX_RING_SIZE;
}
#endif
if (priv->tx_full && dev->tbusy &&
dirty_tx > priv->cur_tx - TX_RING_SIZE + 2) {
/* The ring is no longer full, clear tbusy. */
priv->tx_full = 0;
dev->tbusy = 0;
mark_bh(NET_BH);
}
priv->dirty_tx = dirty_tx;
}
/* Log misc errors. */
if (csr0 & BABL)
priv->stats.tx_errors++; /* Tx babble. */
if (csr0 & MISS)
priv->stats.rx_errors++; /* Missed a Rx frame. */
if (csr0 & MERR) {
printk("%s: Bus master arbitration failure, status %4.4x.\n",
dev->name, csr0);
/* Restart the chip. */
board->Lance.RDP = STRT;
}
}
/* Clear any other interrupt, and set interrupt enable. */
board->Lance.RAP = CSR0; /* PCnet-ISA Controller Status */
board->Lance.RDP = INEA|BABL|CERR|MISS|MERR|IDON;
#if 0
if (ariadne_debug > 4)
printk("%s: exiting interrupt, csr%d=%#4.4x.\n", dev->name,
board->Lance.RAP, board->Lance.RDP);
#endif
dev->interrupt = 0;
return;
}
static int ariadne_start_xmit(struct sk_buff *skb, struct device *dev)
{
struct ariadne_private *priv = (struct ariadne_private *)dev->priv;
struct AriadneBoard *board = priv->board;
int entry;
/* Transmitter timeout, serious problems. */
if (dev->tbusy) {
int tickssofar = jiffies - dev->trans_start;
if (tickssofar < 20)
return(1);
board->Lance.RAP = CSR0; /* PCnet-ISA Controller Status */
printk("%s: transmit timed out, status %4.4x, resetting.\n", dev->name,
board->Lance.RDP);
board->Lance.RDP = STOP;
priv->stats.tx_errors++;
#ifndef final_version
{
int i;
printk(" Ring data dump: dirty_tx %d cur_tx %d%s cur_rx %d.",
priv->dirty_tx, priv->cur_tx, priv->tx_full ? " (full)" : "",
priv->cur_rx);
for (i = 0 ; i < RX_RING_SIZE; i++)
printk("%s %08x %04x %04x", i & 0x3 ? "" : "\n ",
(swapw((priv->rx_ring[i]->RMD1))<<16)|swapw(priv->rx_ring[i]->RMD0),
swapw(-priv->rx_ring[i]->RMD2), swapw(priv->rx_ring[i]->RMD3));
for (i = 0 ; i < TX_RING_SIZE; i++)
printk("%s %08x %04x %04x", i & 0x3 ? "" : "\n ",
(swapw((priv->tx_ring[i]->TMD1))<<16)|swapw(priv->tx_ring[i]->TMD0),
swapw(-priv->tx_ring[i]->TMD2), priv->tx_ring[i]->TMD3);
printk("\n");
}
#endif
ariadne_init_ring(dev);
board->Lance.RDP = INEA|STRT;
dev->tbusy = 0;
dev->trans_start = jiffies;
dev_kfree_skb(skb, FREE_WRITE);
return(0);
}
if (skb == NULL) {
dev_tint(dev);
return(0);
}
if (skb->len <= 0)
return(0);
#if 0
if (ariadne_debug > 3) {
board->Lance.RAP = CSR0; /* PCnet-ISA Controller Status */
printk("%s: ariadne_start_xmit() called, csr0 %4.4x.\n", dev->name,
board->Lance.RDP);
board->Lance.RDP = 0x0000;
}
#endif
/* Block a timer-based transmit from overlapping. This could better be
done with atomic_swap(1, dev->tbusy), but set_bit() works as well. */
if (set_bit(0, (void*)&dev->tbusy) != 0) {
printk("%s: Transmitter access conflict.\n", dev->name);
return(1);
}
if (set_bit(0, (void*)&priv->lock) != 0) {
if (ariadne_debug > 0)
printk("%s: tx queue lock!.\n", dev->name);
/* don't clear dev->tbusy flag. */
return(1);
}
/* Fill in a Tx ring entry */
#if 0
printk("TX pkt type 0x%04x from ", ((u_short *)skb->data)[6]);
{
int i;
u_char *ptr = &((u_char *)skb->data)[6];
for (i = 0; i < 6; i++)
printk("%02x", ptr[i]);
}
printk(" to ");
{
int i;
u_char *ptr = (u_char *)skb->data;
for (i = 0; i < 6; i++)
printk("%02x", ptr[i]);
}
printk(" data 0x%08x len %d\n", (int)skb->data, (int)skb->len);
#endif
entry = priv->cur_tx % TX_RING_SIZE;
/* Caution: the write order is important here, set the base address with
the "ownership" bits last. */
priv->tx_ring[entry]->TMD2 = swapw((u_short)-skb->len);
priv->tx_ring[entry]->TMD3 = 0x0000;
memcpyw(priv->tx_buff[entry], (u_short *)skb->data, skb->len);
#if 0
{
int i, len;
len = skb->len > 64 ? 64 : skb->len;
len >>= 1;
for (i = 0; i < len; i += 8) {
int j;
printk("%04x:", i);
for (j = 0; (j < 8) && ((i+j) < len); j++) {
if (!(j & 1))
printk(" ");
printk("%04x", priv->tx_buff[entry][i+j]);
}
printk("\n");
}
}
#endif
priv->tx_ring[entry]->TMD1 = (priv->tx_ring[entry]->TMD1&0xff00)|TF_OWN|TF_STP|TF_ENP;
dev_kfree_skb(skb, FREE_WRITE);
priv->cur_tx++;
if ((priv->cur_tx >= TX_RING_SIZE) && (priv->dirty_tx >= TX_RING_SIZE)) {
#if 0
printk("*** Subtracting TX_RING_SIZE from cur_tx (%d) and dirty_tx (%d)\n",
priv->cur_tx, priv->dirty_tx);
#endif
priv->cur_tx -= TX_RING_SIZE;
priv->dirty_tx -= TX_RING_SIZE;
}
/* Trigger an immediate send poll. */
board->Lance.RAP = CSR0; /* PCnet-ISA Controller Status */
board->Lance.RDP = INEA|TDMD;
dev->trans_start = jiffies;
cli();
priv->lock = 0;
if (lowb(priv->tx_ring[(entry+1) % TX_RING_SIZE]->TMD1) == 0)
dev->tbusy = 0;
else
priv->tx_full = 1;
sti();
return(0);
}
static int ariadne_rx(struct device *dev)
{
struct ariadne_private *priv = (struct ariadne_private *)dev->priv;
int entry = priv->cur_rx % RX_RING_SIZE;
int i;
/* If we own the next entry, it's a new packet. Send it up. */
while (!(lowb(priv->rx_ring[entry]->RMD1) & RF_OWN)) {
int status = lowb(priv->rx_ring[entry]->RMD1);
if (status != (RF_STP|RF_ENP)) { /* There was an error. */
/* There is a tricky error noted by John Murphy,
<murf@perftech.com> to Russ Nelson: Even with full-sized
buffers it's possible for a jabber packet to use two
buffers, with only the last correctly noting the error. */
if (status & RF_ENP)
/* Only count a general error at the end of a packet.*/
priv->stats.rx_errors++;
if (status & RF_FRAM)
priv->stats.rx_frame_errors++;
if (status & RF_OFLO)
priv->stats.rx_over_errors++;
if (status & RF_CRC)
priv->stats.rx_crc_errors++;
if (status & RF_BUFF)
priv->stats.rx_fifo_errors++;
priv->rx_ring[entry]->RMD1 &= 0xff00|RF_STP|RF_ENP;
} else {
/* Malloc up new buffer, compatible with net-3. */
short pkt_len = swapw(priv->rx_ring[entry]->RMD3);
struct sk_buff *skb;
skb = dev_alloc_skb(pkt_len+2);
if (skb == NULL) {
printk("%s: Memory squeeze, deferring packet.\n", dev->name);
for (i = 0; i < RX_RING_SIZE; i++)
if (lowb(priv->rx_ring[(entry+i) % RX_RING_SIZE]->RMD1) & RF_OWN)
break;
if (i > RX_RING_SIZE-2) {
priv->stats.rx_dropped++;
priv->rx_ring[entry]->RMD1 |= RF_OWN;
priv->cur_rx++;
}
break;
}
skb->dev = dev;
skb_reserve(skb,2); /* 16 byte align */
skb_put(skb,pkt_len); /* Make room */
eth_copy_and_sum(skb, (char *)priv->rx_buff[entry], pkt_len,0);
skb->protocol=eth_type_trans(skb,dev);
#if 0
printk("RX pkt type 0x%04x from ", ((u_short *)skb->data)[6]);
{
int i;
u_char *ptr = &((u_char *)skb->data)[6];
for (i = 0; i < 6; i++)
printk("%02x", ptr[i]);
}
printk(" to ");
{
int i;
u_char *ptr = (u_char *)skb->data;
for (i = 0; i < 6; i++)
printk("%02x", ptr[i]);
}
printk(" data 0x%08x len %d\n", (int)skb->data, (int)skb->len);
#endif
netif_rx(skb);
priv->stats.rx_packets++;
}
priv->rx_ring[entry]->RMD1 |= RF_OWN;
entry = (++priv->cur_rx) % RX_RING_SIZE;
}
priv->cur_rx = priv->cur_rx % RX_RING_SIZE;
/* We should check that at least two ring entries are free. If not,
we should free one and mark stats->rx_dropped++. */
return(0);
}
static struct enet_statistics *ariadne_get_stats(struct device *dev)
{
struct ariadne_private *priv = (struct ariadne_private *)dev->priv;
struct AriadneBoard *board = priv->board;
short saved_addr;
cli();
saved_addr = board->Lance.RAP;
board->Lance.RAP = CSR112; /* Missed Frame Count */
priv->stats.rx_missed_errors = swapw(board->Lance.RDP);
board->Lance.RAP = saved_addr;
sti();
return(&priv->stats);
}
/* Set or clear the multicast filter for this adaptor.
num_addrs == -1 Promiscuous mode, receive all packets
num_addrs == 0 Normal mode, clear multicast list
num_addrs > 0 Multicast mode, receive normal and MC packets, and do
best-effort filtering.
*/
static void set_multicast_list(struct device *dev)
{
struct ariadne_private *priv = (struct ariadne_private *)dev->priv;
struct AriadneBoard *board = priv->board;
/* We take the simple way out and always enable promiscuous mode. */
board->Lance.RAP = CSR0; /* PCnet-ISA Controller Status */
board->Lance.RDP = STOP; /* Temporarily stop the lance. */
if (dev->flags & IFF_PROMISC) {
/* Log any net taps. */
printk("%s: Promiscuous mode enabled.\n", dev->name);
board->Lance.RAP = CSR15; /* Mode Register */
board->Lance.RDP = PROM; /* Set promiscuous mode */
} else {
short multicast_table[4];
int num_addrs = dev->mc_count;
int i;
/* We don't use the multicast table, but rely on upper-layer filtering. */
memset(multicast_table, (num_addrs == 0) ? 0 : -1,
sizeof(multicast_table));
for (i = 0; i < 4; i++) {
board->Lance.RAP = CSR8+(i<<8); /* Logical Address Filter */
board->Lance.RDP = swapw(multicast_table[i]);
}
board->Lance.RAP = CSR15; /* Mode Register */
board->Lance.RDP = 0x0000; /* Unset promiscuous mode */
}
board->Lance.RAP = CSR0; /* PCnet-ISA Controller Status */
board->Lance.RDP = INEA|STRT|IDON; /* Resume normal operation. */
}
#ifdef MODULE
static char devicename[9] = { 0, };
static struct device ariadne_dev =
{
devicename, /* filled in by register_netdev() */
0, 0, 0, 0, /* memory */
0, 0, /* base, irq */
0, 0, 0, NULL, ariadne_probe,
};
int init_module(void)
{
int err;
if ((err = register_netdev(&ariadne_dev))) {
if (err == -EIO)
printk("No Ariadne board found. Module not loaded.\n");
return(err);
}
return(0);
}
void cleanup_module(void)
{
struct ariadne_private *priv = (struct ariadne_private *)ariadne_dev.priv;
unregister_netdev(&ariadne_dev);
zorro_unconfig_board(priv->key, 0);
kfree(priv);
}
#endif /* MODULE */
