Re: PROBLEM: Network hang: "eth0: Tx timed out (f0080), is buffer full?"

Richard Ems
2004-12-21T09:56:02Z

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The patch fails:

# patch -p0 < ~ems/dl2k.patch
patching file dl2k.c
Hunk #1 FAILED at 431.
Hunk #2 succeeded at 444 (offset -2 lines).
Hunk #3 succeeded at 477 (offset -2 lines).
Hunk #4 succeeded at 488 (offset -2 lines).
Hunk #5 succeeded at 573 (offset -2 lines).
Hunk #6 succeeded at 1018 (offset -2 lines).
1 out of 6 hunks FAILED -- saving rejects to file dl2k.c.rej

I tried with --fuzz 9 but it didn't help.

I attached SuSE's original dl2k.c

Thanks, Richard

--
Richard Ems
Tel: +49 40 65803 312
Fax: +49 40 65803 392
Richard.Ems@mtg-marinetechnik.de

MTG Marinetechnik GmbH - Wandsbeker Königstr. 62 - D 22041 Hamburg

GF Dipl.-Ing. Ullrich Keil
Handelsregister: Abt. B Nr. 11 500 - Amtsgericht Hamburg Abt. 66
USt.-IdNr.: DE 1186 70571

[-- Attachment #2: dl2k.c,orig-save-2004.12.20 --]
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/* D-Link DL2000-based Gigabit Ethernet Adapter Linux driver */
/*
Copyright (c) 2001, 2002 by D-Link Corporation
Written by Edward Peng.<edward_peng@dlink.com.tw>
Created 03-May-2001, base on Linux' sundance.c.

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.
*/
/*
Rev Date Description
==========================================================================
0.01 2001/05/03 Created DL2000-based linux driver
0.02 2001/05/21 Added VLAN and hardware checksum support.
1.00 2001/06/26 Added jumbo frame support.
1.01 2001/08/21 Added two parameters, rx_coalesce and rx_timeout.
1.02 2001/10/08 Supported fiber media.
Added flow control parameters.
1.03 2001/10/12 Changed the default media to 1000mbps_fd for
the fiber devices.
1.04 2001/11/08 Fixed Tx stopped when tx very busy.
1.05 2001/11/22 Fixed Tx stopped when unidirectional tx busy.
1.06 2001/12/13 Fixed disconnect bug at 10Mbps mode.
Fixed tx_full flag incorrect.
Added tx_coalesce paramter.
1.07 2002/01/03 Fixed miscount of RX frame error.
1.08 2002/01/17 Fixed the multicast bug.
1.09 2002/03/07 Move rx-poll-now to re-fill loop.
Added rio_timer() to watch rx buffers.
1.10 2002/04/16 Fixed miscount of carrier error.
1.11 2002/05/23 Added ISR schedule scheme
Fixed miscount of rx frame error for DGE-550SX.
Fixed VLAN bug.
1.12 2002/06/13 Lock tx_coalesce=1 on 10/100Mbps mode.
1.13 2002/08/13 1. Fix disconnection (many tx:carrier/rx:frame
errs) with some mainboards.
2. Use definition "DRV_NAME" "DRV_VERSION"
"DRV_RELDATE" for flexibility.
1.14 2002/08/14 Support ethtool.
1.15 2002/08/27 Changed the default media to Auto-Negotiation
for the fiber devices.
1.16 2002/09/04 More power down time for fiber devices auto-
negotiation.
Fix disconnect bug after ifup and ifdown.
1.17 2002/10/03 Fix RMON statistics overflow.
Always use I/O mapping to access eeprom,
avoid system freezing with some chipsets.

*/
#define DRV_NAME "D-Link DL2000-based linux driver"
#define DRV_VERSION "v1.17a"
#define DRV_RELDATE "2002/10/04"
#include "dl2k.h"

static char version[] __devinitdata =
KERN_INFO DRV_NAME " " DRV_VERSION " " DRV_RELDATE "\n";
#define MAX_UNITS 8
static int mtu[MAX_UNITS];
static int vlan[MAX_UNITS];
static int jumbo[MAX_UNITS];
static char *media[MAX_UNITS];
static int tx_flow=-1;
static int rx_flow=-1;
static int copy_thresh;
static int rx_coalesce=10; /* Rx frame count each interrupt */
static int rx_timeout=200; /* Rx DMA wait time in 640ns increments */
static int tx_coalesce=16; /* HW xmit count each TxDMAComplete */

MODULE_AUTHOR ("Edward Peng");
MODULE_DESCRIPTION ("D-Link DL2000-based Gigabit Ethernet Adapter");
MODULE_LICENSE("GPL");
MODULE_PARM (mtu, "1-" __MODULE_STRING (MAX_UNITS) "i");
MODULE_PARM (media, "1-" __MODULE_STRING (MAX_UNITS) "s");
MODULE_PARM (vlan, "1-" __MODULE_STRING (MAX_UNITS) "i");
MODULE_PARM (jumbo, "1-" __MODULE_STRING (MAX_UNITS) "i");
MODULE_PARM (tx_flow, "i");
MODULE_PARM (rx_flow, "i");
MODULE_PARM (copy_thresh, "i");
MODULE_PARM (rx_coalesce, "i"); /* Rx frame count each interrupt */
MODULE_PARM (rx_timeout, "i"); /* Rx DMA wait time in 64ns increments */
MODULE_PARM (tx_coalesce, "i"); /* HW xmit count each TxDMAComplete */

/* Enable the default interrupts */
#define DEFAULT_INTR (RxDMAComplete | HostError | IntRequested | TxDMAComplete| \
UpdateStats | LinkEvent)
#define EnableInt() \
writew(DEFAULT_INTR, ioaddr + IntEnable)

static int max_intrloop = 50;
static int multicast_filter_limit = 0x40;

static int rio_open (struct net_device *dev);
static void rio_timer (unsigned long data);
static void rio_tx_timeout (struct net_device *dev);
static void alloc_list (struct net_device *dev);
static int start_xmit (struct sk_buff *skb, struct net_device *dev);
static irqreturn_t rio_interrupt (int irq, void *dev_instance, struct pt_regs *regs);
static void rio_free_tx (struct net_device *dev, int irq);
static void tx_error (struct net_device *dev, int tx_status);
static int receive_packet (struct net_device *dev);
static void rio_error (struct net_device *dev, int int_status);
static int change_mtu (struct net_device *dev, int new_mtu);
static void set_multicast (struct net_device *dev);
static struct net_device_stats *get_stats (struct net_device *dev);
static int clear_stats (struct net_device *dev);
static int rio_ethtool_ioctl (struct net_device *dev, void __user *useraddr);
static int rio_ioctl (struct net_device *dev, struct ifreq *rq, int cmd);
static int rio_close (struct net_device *dev);
static int find_miiphy (struct net_device *dev);
static int parse_eeprom (struct net_device *dev);
static int read_eeprom (long ioaddr, int eep_addr);
static int mii_wait_link (struct net_device *dev, int wait);
static int mii_set_media (struct net_device *dev);
static int mii_get_media (struct net_device *dev);
static int mii_set_media_pcs (struct net_device *dev);
static int mii_get_media_pcs (struct net_device *dev);
static int mii_read (struct net_device *dev, int phy_addr, int reg_num);
static int mii_write (struct net_device *dev, int phy_addr, int reg_num,
u16 data);

static int __devinit
rio_probe1 (struct pci_dev *pdev, const struct pci_device_id *ent)
{
struct net_device *dev;
struct netdev_private *np;
static int card_idx;
int chip_idx = ent->driver_data;
int err, irq;
long ioaddr;
static int version_printed;
void *ring_space;
dma_addr_t ring_dma;

if (!version_printed++)
printk ("%s", version);

err = pci_enable_device (pdev);
if (err)
return err;

irq = pdev->irq;
err = pci_request_regions (pdev, "dl2k");
if (err)
goto err_out_disable;

pci_set_master (pdev);
dev = alloc_etherdev (sizeof (*np));
if (!dev) {
err = -ENOMEM;
goto err_out_res;
}
SET_MODULE_OWNER (dev);
SET_NETDEV_DEV(dev, &pdev->dev);

#ifdef MEM_MAPPING
ioaddr = pci_resource_start (pdev, 1);
ioaddr = (long) ioremap (ioaddr, RIO_IO_SIZE);
if (!ioaddr) {
err = -ENOMEM;
goto err_out_dev;
}
#else
ioaddr = pci_resource_start (pdev, 0);
#endif
dev->base_addr = ioaddr;
dev->irq = irq;
np = dev->priv;
np->chip_id = chip_idx;
np->pdev = pdev;
spin_lock_init (&np->tx_lock);
spin_lock_init (&np->rx_lock);

/* Parse manual configuration */
np->an_enable = 1;
np->tx_coalesce = 1;
if (card_idx < MAX_UNITS) {
if (media[card_idx] != NULL) {
np->an_enable = 0;
if (strcmp (media[card_idx], "auto") == 0 ||
strcmp (media[card_idx], "autosense") == 0 ||
strcmp (media[card_idx], "0") == 0 ) {
np->an_enable = 2;
} else if (strcmp (media[card_idx], "100mbps_fd") == 0 ||
strcmp (media[card_idx], "4") == 0) {
np->speed = 100;
np->full_duplex = 1;
} else if (strcmp (media[card_idx], "100mbps_hd") == 0
|| strcmp (media[card_idx], "3") == 0) {
np->speed = 100;
np->full_duplex = 0;
} else if (strcmp (media[card_idx], "10mbps_fd") == 0 ||
strcmp (media[card_idx], "2") == 0) {
np->speed = 10;
np->full_duplex = 1;
} else if (strcmp (media[card_idx], "10mbps_hd") == 0 ||
strcmp (media[card_idx], "1") == 0) {
np->speed = 10;
np->full_duplex = 0;
} else if (strcmp (media[card_idx], "1000mbps_fd") == 0 ||
strcmp (media[card_idx], "6") == 0) {
np->speed=1000;
np->full_duplex=1;
} else if (strcmp (media[card_idx], "1000mbps_hd") == 0 ||
strcmp (media[card_idx], "5") == 0) {
np->speed = 1000;
np->full_duplex = 0;
} else {
np->an_enable = 1;
}
}
if (jumbo[card_idx] != 0) {
np->jumbo = 1;
dev->mtu = MAX_JUMBO;
} else {
np->jumbo = 0;
if (mtu[card_idx] > 0 && mtu[card_idx] < PACKET_SIZE)
dev->mtu = mtu[card_idx];
}
np->vlan = (vlan[card_idx] > 0 && vlan[card_idx] < 4096) ?
vlan[card_idx] : 0;
if (rx_coalesce > 0 && rx_timeout > 0) {
np->rx_coalesce = rx_coalesce;
np->rx_timeout = rx_timeout;
np->coalesce = 1;
}
np->tx_flow = (tx_flow == 0) ? 0 : 1;
np->rx_flow = (rx_flow == 0) ? 0 : 1;

if (tx_coalesce < 1)
tx_coalesce = 1;
else if (tx_coalesce > TX_RING_SIZE-1)
tx_coalesce = TX_RING_SIZE - 1;
}
dev->open = &rio_open;
dev->hard_start_xmit = &start_xmit;
dev->stop = &rio_close;
dev->get_stats = &get_stats;
dev->set_multicast_list = &set_multicast;
dev->do_ioctl = &rio_ioctl;
dev->tx_timeout = &rio_tx_timeout;
dev->watchdog_timeo = TX_TIMEOUT;
dev->change_mtu = &change_mtu;
#if 0
dev->features = NETIF_F_IP_CSUM;
#endif
pci_set_drvdata (pdev, dev);

ring_space = pci_alloc_consistent (pdev, TX_TOTAL_SIZE, &ring_dma);
if (!ring_space)
goto err_out_iounmap;
np->tx_ring = (struct netdev_desc *) ring_space;
np->tx_ring_dma = ring_dma;

ring_space = pci_alloc_consistent (pdev, RX_TOTAL_SIZE, &ring_dma);
if (!ring_space)
goto err_out_unmap_tx;
np->rx_ring = (struct netdev_desc *) ring_space;
np->rx_ring_dma = ring_dma;

/* Parse eeprom data */
parse_eeprom (dev);

/* Find PHY address */
err = find_miiphy (dev);
if (err)
goto err_out_unmap_rx;

/* Fiber device? */
np->phy_media = (readw(ioaddr + ASICCtrl) & PhyMedia) ? 1 : 0;
np->link_status = 0;
/* Set media and reset PHY */
if (np->phy_media) {
/* default Auto-Negotiation for fiber deivices */
if (np->an_enable == 2) {
np->an_enable = 1;
}
mii_set_media_pcs (dev);
} else {
/* Auto-Negotiation is mandatory for 1000BASE-T,
IEEE 802.3ab Annex 28D page 14 */
if (np->speed == 1000)
np->an_enable = 1;
mii_set_media (dev);
}
pci_read_config_byte(pdev, PCI_REVISION_ID, &np->pci_rev_id);

err = register_netdev (dev);
if (err)
goto err_out_unmap_rx;

card_idx++;

printk (KERN_INFO "%s: %s, %02x:%02x:%02x:%02x:%02x:%02x, IRQ %d\n",
dev->name, np->name,
dev->dev_addr[0], dev->dev_addr[1], dev->dev_addr[2],
dev->dev_addr[3], dev->dev_addr[4], dev->dev_addr[5], irq);
if (tx_coalesce > 1)
printk(KERN_INFO "tx_coalesce:\t%d packets\n",
tx_coalesce);
if (np->coalesce)
printk(KERN_INFO "rx_coalesce:\t%d packets\n"
KERN_INFO "rx_timeout: \t%d ns\n",
np->rx_coalesce, np->rx_timeout*640);
if (np->vlan)
printk(KERN_INFO "vlan(id):\t%d\n", np->vlan);
return 0;

err_out_unmap_rx:
pci_free_consistent (pdev, RX_TOTAL_SIZE, np->rx_ring, np->rx_ring_dma);
err_out_unmap_tx:
pci_free_consistent (pdev, TX_TOTAL_SIZE, np->tx_ring, np->tx_ring_dma);
err_out_iounmap:
#ifdef MEM_MAPPING
iounmap ((void *) ioaddr);

err_out_dev:
#endif
free_netdev (dev);

err_out_res:
pci_release_regions (pdev);

err_out_disable:
pci_disable_device (pdev);
return err;
}

int
find_miiphy (struct net_device *dev)
{
int i, phy_found = 0;
struct netdev_private *np;
long ioaddr;
np = dev->priv;
ioaddr = dev->base_addr;
np->phy_addr = 1;

for (i = 31; i >= 0; i--) {
int mii_status = mii_read (dev, i, 1);
if (mii_status != 0xffff && mii_status != 0x0000) {
np->phy_addr = i;
phy_found++;
}
}
if (!phy_found) {
printk (KERN_ERR "%s: No MII PHY found!\n", dev->name);
return -ENODEV;
}
return 0;
}

int
parse_eeprom (struct net_device *dev)
{
int i, j;
long ioaddr = dev->base_addr;
u8 sromdata[256];
u8 *psib;
u32 crc;
PSROM_t psrom = (PSROM_t) sromdata;
struct netdev_private *np = dev->priv;

int cid, next;

#ifdef MEM_MAPPING
ioaddr = pci_resource_start (np->pdev, 0);
#endif
/* Read eeprom */
for (i = 0; i < 128; i++) {
((u16 *) sromdata)[i] = le16_to_cpu (read_eeprom (ioaddr, i));
}
#ifdef MEM_MAPPING
ioaddr = dev->base_addr;
#endif
/* Check CRC */
crc = ~ether_crc_le (256 - 4, sromdata);
if (psrom->crc != crc) {
printk (KERN_ERR "%s: EEPROM data CRC error.\n", dev->name);
return -1;
}

/* Set MAC address */
for (i = 0; i < 6; i++)
dev->dev_addr[i] = psrom->mac_addr[i];

/* Parse Software Infomation Block */
i = 0x30;
psib = (u8 *) sromdata;
do {
cid = psib[i++];
next = psib[i++];
if ((cid == 0 && next == 0) || (cid == 0xff && next == 0xff)) {
printk (KERN_ERR "Cell data error\n");
return -1;
}
switch (cid) {
case 0: /* Format version */
break;
case 1: /* End of cell */
return 0;
case 2: /* Duplex Polarity */
np->duplex_polarity = psib[i];
writeb (readb (ioaddr + PhyCtrl) | psib[i],
ioaddr + PhyCtrl);
break;
case 3: /* Wake Polarity */
np->wake_polarity = psib[i];
break;
case 9: /* Adapter description */
j = (next - i > 255) ? 255 : next - i;
memcpy (np->name, &(psib[i]), j);
break;
case 4:
case 5:
case 6:
case 7:
case 8: /* Reversed */
break;
default: /* Unknown cell */
return -1;
}
i = next;
} while (1);

return 0;
}

static int
rio_open (struct net_device *dev)
{
struct netdev_private *np = dev->priv;
long ioaddr = dev->base_addr;
int i;
u16 macctrl;

i = request_irq (dev->irq, &rio_interrupt, SA_SHIRQ, dev->name, dev);
if (i)
return i;

/* Reset all logic functions */
writew (GlobalReset | DMAReset | FIFOReset | NetworkReset | HostReset,
ioaddr + ASICCtrl + 2);
mdelay(10);

/* DebugCtrl bit 4, 5, 9 must set */
writel (readl (ioaddr + DebugCtrl) | 0x0230, ioaddr + DebugCtrl);

/* Jumbo frame */
if (np->jumbo != 0)
writew (MAX_JUMBO+14, ioaddr + MaxFrameSize);

alloc_list (dev);

/* Get station address */
for (i = 0; i < 6; i++)
writeb (dev->dev_addr[i], ioaddr + StationAddr0 + i);

set_multicast (dev);
if (np->coalesce) {
writel (np->rx_coalesce | np->rx_timeout << 16,
ioaddr + RxDMAIntCtrl);
}
/* Set RIO to poll every N*320nsec. */
writeb (0x20, ioaddr + RxDMAPollPeriod);
writeb (0xff, ioaddr + TxDMAPollPeriod);
writeb (0x30, ioaddr + RxDMABurstThresh);
writeb (0x30, ioaddr + RxDMAUrgentThresh);
writel (0x0007ffff, ioaddr + RmonStatMask);
/* clear statistics */
clear_stats (dev);

/* VLAN supported */
if (np->vlan) {
/* priority field in RxDMAIntCtrl */
writel (readl(ioaddr + RxDMAIntCtrl) | 0x7 << 10,
ioaddr + RxDMAIntCtrl);
/* VLANId */
writew (np->vlan, ioaddr + VLANId);
/* Length/Type should be 0x8100 */
writel (0x8100 << 16 | np->vlan, ioaddr + VLANTag);
/* Enable AutoVLANuntagging, but disable AutoVLANtagging.
VLAN information tagged by TFC' VID, CFI fields. */
writel (readl (ioaddr + MACCtrl) | AutoVLANuntagging,
ioaddr + MACCtrl);
}

init_timer (&np->timer);
np->timer.expires = jiffies + 1*HZ;
np->timer.data = (unsigned long) dev;
np->timer.function = &rio_timer;
add_timer (&np->timer);

/* Start Tx/Rx */
writel (readl (ioaddr + MACCtrl) | StatsEnable | RxEnable | TxEnable,
ioaddr + MACCtrl);

macctrl = 0;
macctrl |= (np->vlan) ? AutoVLANuntagging : 0;
macctrl |= (np->full_duplex) ? DuplexSelect : 0;
macctrl |= (np->tx_flow) ? TxFlowControlEnable : 0;
macctrl |= (np->rx_flow) ? RxFlowControlEnable : 0;
writew(macctrl, ioaddr + MACCtrl);

netif_start_queue (dev);

/* Enable default interrupts */
EnableInt ();
return 0;
}

static void
rio_timer (unsigned long data)
{
struct net_device *dev = (struct net_device *)data;
struct netdev_private *np = dev->priv;
unsigned int entry;
int next_tick = 1*HZ;
unsigned long flags;

spin_lock_irqsave(&np->rx_lock, flags);
/* Recover rx ring exhausted error */
if (np->cur_rx - np->old_rx >= RX_RING_SIZE) {
printk(KERN_INFO "Try to recover rx ring exhausted...\n");
/* Re-allocate skbuffs to fill the descriptor ring */
for (; np->cur_rx - np->old_rx > 0; np->old_rx++) {
struct sk_buff *skb;
entry = np->old_rx % RX_RING_SIZE;
/* Dropped packets don't need to re-allocate */
if (np->rx_skbuff[entry] == NULL) {
skb = dev_alloc_skb (np->rx_buf_sz);
if (skb == NULL) {
np->rx_ring[entry].fraginfo = 0;
printk (KERN_INFO
"%s: Still unable to re-allocate Rx skbuff.#%d\n",
dev->name, entry);
break;
}
np->rx_skbuff[entry] = skb;
skb->dev = dev;
/* 16 byte align the IP header */
skb_reserve (skb, 2);
np->rx_ring[entry].fraginfo =
cpu_to_le64 (pci_map_single
(np->pdev, skb->tail, np->rx_buf_sz,
PCI_DMA_FROMDEVICE));
}
np->rx_ring[entry].fraginfo |=
cpu_to_le64 (np->rx_buf_sz) << 48;
np->rx_ring[entry].status = 0;
} /* end for */
} /* end if */
spin_unlock_irqrestore (&np->rx_lock, flags);
np->timer.expires = jiffies + next_tick;
add_timer(&np->timer);
}

static void
rio_tx_timeout (struct net_device *dev)
{
long ioaddr = dev->base_addr;

printk (KERN_INFO "%s: Tx timed out (%4.4x), is buffer full?\n",
dev->name, readl (ioaddr + TxStatus));
rio_free_tx(dev, 0);
dev->if_port = 0;
dev->trans_start = jiffies;
}

/* allocate and initialize Tx and Rx descriptors */
static void
alloc_list (struct net_device *dev)
{
struct netdev_private *np = dev->priv;
int i;

np->cur_rx = np->cur_tx = 0;
np->old_rx = np->old_tx = 0;
np->rx_buf_sz = (dev->mtu <= 1500 ? PACKET_SIZE : dev->mtu + 32);

/* Initialize Tx descriptors, TFDListPtr leaves in start_xmit(). */
for (i = 0; i < TX_RING_SIZE; i++) {
np->tx_skbuff[i] = NULL;
np->tx_ring[i].status = cpu_to_le64 (TFDDone);
np->tx_ring[i].next_desc = cpu_to_le64 (np->tx_ring_dma +
((i+1)%TX_RING_SIZE) *
sizeof (struct netdev_desc));
}

/* Initialize Rx descriptors */
for (i = 0; i < RX_RING_SIZE; i++) {
np->rx_ring[i].next_desc = cpu_to_le64 (np->rx_ring_dma +
((i + 1) % RX_RING_SIZE) *
sizeof (struct netdev_desc));
np->rx_ring[i].status = 0;
np->rx_ring[i].fraginfo = 0;
np->rx_skbuff[i] = NULL;
}

/* Allocate the rx buffers */
for (i = 0; i < RX_RING_SIZE; i++) {
/* Allocated fixed size of skbuff */
struct sk_buff *skb = dev_alloc_skb (np->rx_buf_sz);
np->rx_skbuff[i] = skb;
if (skb == NULL) {
printk (KERN_ERR
"%s: alloc_list: allocate Rx buffer error! ",
dev->name);
break;
}
skb->dev = dev; /* Mark as being used by this device. */
skb_reserve (skb, 2); /* 16 byte align the IP header. */
/* Rubicon now supports 40 bits of addressing space. */
np->rx_ring[i].fraginfo =
cpu_to_le64 ( pci_map_single (
np->pdev, skb->tail, np->rx_buf_sz,
PCI_DMA_FROMDEVICE));
np->rx_ring[i].fraginfo |= cpu_to_le64 (np->rx_buf_sz) << 48;
}

/* Set RFDListPtr */
writel (cpu_to_le32 (np->rx_ring_dma), dev->base_addr + RFDListPtr0);
writel (0, dev->base_addr + RFDListPtr1);

return;
}

static int
start_xmit (struct sk_buff *skb, struct net_device *dev)
{
struct netdev_private *np = dev->priv;
struct netdev_desc *txdesc;
unsigned entry;
u32 ioaddr;
u64 tfc_vlan_tag = 0;

if (np->link_status == 0) { /* Link Down */
dev_kfree_skb(skb);
return 0;
}
ioaddr = dev->base_addr;
entry = np->cur_tx % TX_RING_SIZE;
np->tx_skbuff[entry] = skb;
txdesc = &np->tx_ring[entry];

#if 0
if (skb->ip_summed == CHECKSUM_HW) {
txdesc->status |=
cpu_to_le64 (TCPChecksumEnable | UDPChecksumEnable |
IPChecksumEnable);
}
#endif
if (np->vlan) {
tfc_vlan_tag =
cpu_to_le64 (VLANTagInsert) |
(cpu_to_le64 (np->vlan) << 32) |
(cpu_to_le64 (skb->priority) << 45);
}
txdesc->fraginfo = cpu_to_le64 (pci_map_single (np->pdev, skb->data,
skb->len,
PCI_DMA_TODEVICE));
txdesc->fraginfo |= cpu_to_le64 (skb->len) << 48;

/* DL2K bug: DMA fails to get next descriptor ptr in 10Mbps mode
* Work around: Always use 1 descriptor in 10Mbps mode */
if (entry % np->tx_coalesce == 0 || np->speed == 10)
txdesc->status = cpu_to_le64 (entry | tfc_vlan_tag |
WordAlignDisable |
TxDMAIndicate |
(1 << FragCountShift));
else
txdesc->status = cpu_to_le64 (entry | tfc_vlan_tag |
WordAlignDisable |
(1 << FragCountShift));

/* TxDMAPollNow */
writel (readl (ioaddr + DMACtrl) | 0x00001000, ioaddr + DMACtrl);
/* Schedule ISR */
writel(10000, ioaddr + CountDown);
np->cur_tx = (np->cur_tx + 1) % TX_RING_SIZE;
if ((np->cur_tx - np->old_tx + TX_RING_SIZE) % TX_RING_SIZE
< TX_QUEUE_LEN - 1 && np->speed != 10) {
/* do nothing */
} else if (!netif_queue_stopped(dev)) {
netif_stop_queue (dev);
}

/* The first TFDListPtr */
if (readl (dev->base_addr + TFDListPtr0) == 0) {
writel (np->tx_ring_dma + entry * sizeof (struct netdev_desc),
dev->base_addr + TFDListPtr0);
writel (0, dev->base_addr + TFDListPtr1);
}

/* NETDEV WATCHDOG timer */
dev->trans_start = jiffies;
return 0;
}

static irqreturn_t
rio_interrupt (int irq, void *dev_instance, struct pt_regs *rgs)
{
struct net_device *dev = dev_instance;
struct netdev_private *np;
unsigned int_status;
long ioaddr;
int cnt = max_intrloop;
int handled = 0;

ioaddr = dev->base_addr;
np = dev->priv;
while (1) {
int_status = readw (ioaddr + IntStatus);
writew (int_status, ioaddr + IntStatus);
int_status &= DEFAULT_INTR;
if (int_status == 0 || --cnt < 0)
break;
handled = 1;
/* Processing received packets */
if (int_status & RxDMAComplete)
receive_packet (dev);
/* TxDMAComplete interrupt */
if ((int_status & (TxDMAComplete|IntRequested))) {
int tx_status;
tx_status = readl (ioaddr + TxStatus);
if (tx_status & 0x01)
tx_error (dev, tx_status);
/* Free used tx skbuffs */
rio_free_tx (dev, 1);
}

/* Handle uncommon events */
if (int_status &
(HostError | LinkEvent | UpdateStats))
rio_error (dev, int_status);
}
if (np->cur_tx != np->old_tx)
writel (100, ioaddr + CountDown);
return IRQ_RETVAL(handled);
}

static void
rio_free_tx (struct net_device *dev, int irq)
{
struct netdev_private *np = dev->priv;
int entry = np->old_tx % TX_RING_SIZE;
int tx_use = 0;
unsigned long flag = 0;

if (irq)
spin_lock(&np->tx_lock);
else
spin_lock_irqsave(&np->tx_lock, flag);

/* Free used tx skbuffs */
while (entry != np->cur_tx) {
struct sk_buff *skb;

if (!(np->tx_ring[entry].status & TFDDone))
break;
skb = np->tx_skbuff[entry];
pci_unmap_single (np->pdev,
np->tx_ring[entry].fraginfo,
skb->len, PCI_DMA_TODEVICE);
if (irq)
dev_kfree_skb_irq (skb);
else
dev_kfree_skb (skb);

np->tx_skbuff[entry] = NULL;
entry = (entry + 1) % TX_RING_SIZE;
tx_use++;
}
if (irq)
spin_unlock(&np->tx_lock);
else
spin_unlock_irqrestore(&np->tx_lock, flag);
np->old_tx = entry;

/* If the ring is no longer full, clear tx_full and
call netif_wake_queue() */

if (netif_queue_stopped(dev) &&
((np->cur_tx - np->old_tx + TX_RING_SIZE) % TX_RING_SIZE
< TX_QUEUE_LEN - 1 || np->speed == 10)) {
netif_wake_queue (dev);
}
}

static void
tx_error (struct net_device *dev, int tx_status)
{
struct netdev_private *np;
long ioaddr = dev->base_addr;
int frame_id;
int i;

np = dev->priv;

frame_id = (tx_status & 0xffff0000);
printk (KERN_ERR "%s: Transmit error, TxStatus %4.4x, FrameId %d.\n",
dev->name, tx_status, frame_id);
np->stats.tx_errors++;
/* Ttransmit Underrun */
if (tx_status & 0x10) {
np->stats.tx_fifo_errors++;
writew (readw (ioaddr + TxStartThresh) + 0x10,
ioaddr + TxStartThresh);
/* Transmit Underrun need to set TxReset, DMARest, FIFOReset */
writew (TxReset | DMAReset | FIFOReset | NetworkReset,
ioaddr + ASICCtrl + 2);
/* Wait for ResetBusy bit clear */
for (i = 50; i > 0; i--) {
if ((readw (ioaddr + ASICCtrl + 2) & ResetBusy) == 0)
break;
mdelay (1);
}
rio_free_tx (dev, 1);
/* Reset TFDListPtr */
writel (np->tx_ring_dma +
np->old_tx * sizeof (struct netdev_desc),
dev->base_addr + TFDListPtr0);
writel (0, dev->base_addr + TFDListPtr1);

/* Let TxStartThresh stay default value */
}
/* Late Collision */
if (tx_status & 0x04) {
np->stats.tx_fifo_errors++;
/* TxReset and clear FIFO */
writew (TxReset | FIFOReset, ioaddr + ASICCtrl + 2);
/* Wait reset done */
for (i = 50; i > 0; i--) {
if ((readw (ioaddr + ASICCtrl + 2) & ResetBusy) == 0)
break;
mdelay (1);
}
/* Let TxStartThresh stay default value */
}
/* Maximum Collisions */
#ifdef ETHER_STATS
if (tx_status & 0x08)
np->stats.collisions16++;
#else
if (tx_status & 0x08)
np->stats.collisions++;
#endif
/* Restart the Tx */
writel (readw (dev->base_addr + MACCtrl) | TxEnable, ioaddr + MACCtrl);
}

static int
receive_packet (struct net_device *dev)
{
struct netdev_private *np = dev->priv;
int entry = np->cur_rx % RX_RING_SIZE;
int cnt = 30;

/* If RFDDone, FrameStart and FrameEnd set, there is a new packet in. */
while (1) {
struct netdev_desc *desc = &np->rx_ring[entry];
int pkt_len;
u64 frame_status;

if (!(desc->status & RFDDone) ||
!(desc->status & FrameStart) || !(desc->status & FrameEnd))
break;

/* Chip omits the CRC. */
pkt_len = le64_to_cpu (desc->status & 0xffff);
frame_status = le64_to_cpu (desc->status);
if (--cnt < 0)
break;
/* Update rx error statistics, drop packet. */
if (frame_status & RFS_Errors) {
np->stats.rx_errors++;
if (frame_status & (RxRuntFrame | RxLengthError))
np->stats.rx_length_errors++;
if (frame_status & RxFCSError)
np->stats.rx_crc_errors++;
if (frame_status & RxAlignmentError && np->speed != 1000)
np->stats.rx_frame_errors++;
if (frame_status & RxFIFOOverrun)
np->stats.rx_fifo_errors++;
} else {
struct sk_buff *skb;

/* Small skbuffs for short packets */
if (pkt_len > copy_thresh) {
pci_unmap_single (np->pdev, desc->fraginfo,
np->rx_buf_sz,
PCI_DMA_FROMDEVICE);
skb_put (skb = np->rx_skbuff[entry], pkt_len);
np->rx_skbuff[entry] = NULL;
} else if ((skb = dev_alloc_skb (pkt_len + 2)) != NULL) {
pci_dma_sync_single_for_cpu(np->pdev,
desc->fraginfo,
np->rx_buf_sz,
PCI_DMA_FROMDEVICE);
skb->dev = dev;
/* 16 byte align the IP header */
skb_reserve (skb, 2);
eth_copy_and_sum (skb,
np->rx_skbuff[entry]->tail,
pkt_len, 0);
skb_put (skb, pkt_len);
pci_dma_sync_single_for_device(np->pdev,
desc->fraginfo,
np->rx_buf_sz,
PCI_DMA_FROMDEVICE);
}
skb->protocol = eth_type_trans (skb, dev);
#if 0
/* Checksum done by hw, but csum value unavailable. */
if (np->pci_rev_id >= 0x0c &&
!(frame_status & (TCPError | UDPError | IPError))) {
skb->ip_summed = CHECKSUM_UNNECESSARY;
}
#endif
netif_rx (skb);
dev->last_rx = jiffies;
}
entry = (entry + 1) % RX_RING_SIZE;
}
spin_lock(&np->rx_lock);
np->cur_rx = entry;
/* Re-allocate skbuffs to fill the descriptor ring */
entry = np->old_rx;
while (entry != np->cur_rx) {
struct sk_buff *skb;
/* Dropped packets don't need to re-allocate */
if (np->rx_skbuff[entry] == NULL) {
skb = dev_alloc_skb (np->rx_buf_sz);
if (skb == NULL) {
np->rx_ring[entry].fraginfo = 0;
printk (KERN_INFO
"%s: receive_packet: "
"Unable to re-allocate Rx skbuff.#%d\n",
dev->name, entry);
break;
}
np->rx_skbuff[entry] = skb;
skb->dev = dev;
/* 16 byte align the IP header */
skb_reserve (skb, 2);
np->rx_ring[entry].fraginfo =
cpu_to_le64 (pci_map_single
(np->pdev, skb->tail, np->rx_buf_sz,
PCI_DMA_FROMDEVICE));
}
np->rx_ring[entry].fraginfo |=
cpu_to_le64 (np->rx_buf_sz) << 48;
np->rx_ring[entry].status = 0;
entry = (entry + 1) % RX_RING_SIZE;
}
np->old_rx = entry;
spin_unlock(&np->rx_lock);
return 0;
}

static void
rio_error (struct net_device *dev, int int_status)
{
long ioaddr = dev->base_addr;
struct netdev_private *np = dev->priv;
u16 macctrl;

/* Link change event */
if (int_status & LinkEvent) {
if (mii_wait_link (dev, 10) == 0) {
printk (KERN_INFO "%s: Link up\n", dev->name);
if (np->phy_media)
mii_get_media_pcs (dev);
else
mii_get_media (dev);
if (np->speed == 1000)
np->tx_coalesce = tx_coalesce;
else
np->tx_coalesce = 1;
macctrl = 0;
macctrl |= (np->vlan) ? AutoVLANuntagging : 0;
macctrl |= (np->full_duplex) ? DuplexSelect : 0;
macctrl |= (np->tx_flow) ?
TxFlowControlEnable : 0;
macctrl |= (np->rx_flow) ?
RxFlowControlEnable : 0;
writew(macctrl, ioaddr + MACCtrl);
np->link_status = 1;
netif_carrier_on(dev);
} else {
printk (KERN_INFO "%s: Link off\n", dev->name);
np->link_status = 0;
netif_carrier_off(dev);
}
}

/* UpdateStats statistics registers */
if (int_status & UpdateStats) {
get_stats (dev);
}

/* PCI Error, a catastronphic error related to the bus interface
occurs, set GlobalReset and HostReset to reset. */
if (int_status & HostError) {
printk (KERN_ERR "%s: HostError! IntStatus %4.4x.\n",
dev->name, int_status);
writew (GlobalReset | HostReset, ioaddr + ASICCtrl + 2);
mdelay (500);
}
}

static struct net_device_stats *
get_stats (struct net_device *dev)
{
long ioaddr = dev->base_addr;
struct netdev_private *np = dev->priv;
#ifdef MEM_MAPPING
int i;
#endif
unsigned int stat_reg;

/* All statistics registers need to be acknowledged,
else statistic overflow could cause problems */

np->stats.rx_packets += readl (ioaddr + FramesRcvOk);
np->stats.tx_packets += readl (ioaddr + FramesXmtOk);
np->stats.rx_bytes += readl (ioaddr + OctetRcvOk);
np->stats.tx_bytes += readl (ioaddr + OctetXmtOk);

np->stats.multicast = readl (ioaddr + McstFramesRcvdOk);
np->stats.collisions += readl (ioaddr + SingleColFrames)
+ readl (ioaddr + MultiColFrames);

/* detailed tx errors */
stat_reg = readw (ioaddr + FramesAbortXSColls);
np->stats.tx_aborted_errors += stat_reg;
np->stats.tx_errors += stat_reg;

stat_reg = readw (ioaddr + CarrierSenseErrors);
np->stats.tx_carrier_errors += stat_reg;
np->stats.tx_errors += stat_reg;

/* Clear all other statistic register. */
readl (ioaddr + McstOctetXmtOk);
readw (ioaddr + BcstFramesXmtdOk);
readl (ioaddr + McstFramesXmtdOk);
readw (ioaddr + BcstFramesRcvdOk);
readw (ioaddr + MacControlFramesRcvd);
readw (ioaddr + FrameTooLongErrors);
readw (ioaddr + InRangeLengthErrors);
readw (ioaddr + FramesCheckSeqErrors);
readw (ioaddr + FramesLostRxErrors);
readl (ioaddr + McstOctetXmtOk);
readl (ioaddr + BcstOctetXmtOk);
readl (ioaddr + McstFramesXmtdOk);
readl (ioaddr + FramesWDeferredXmt);
readl (ioaddr + LateCollisions);
readw (ioaddr + BcstFramesXmtdOk);
readw (ioaddr + MacControlFramesXmtd);
readw (ioaddr + FramesWEXDeferal);

#ifdef MEM_MAPPING
for (i = 0x100; i <= 0x150; i += 4)
readl (ioaddr + i);
#endif
readw (ioaddr + TxJumboFrames);
readw (ioaddr + RxJumboFrames);
readw (ioaddr + TCPCheckSumErrors);
readw (ioaddr + UDPCheckSumErrors);
readw (ioaddr + IPCheckSumErrors);
return &np->stats;
}

static int
clear_stats (struct net_device *dev)
{
long ioaddr = dev->base_addr;
#ifdef MEM_MAPPING
int i;
#endif

/* All statistics registers need to be acknowledged,
else statistic overflow could cause problems */
readl (ioaddr + FramesRcvOk);
readl (ioaddr + FramesXmtOk);
readl (ioaddr + OctetRcvOk);
readl (ioaddr + OctetXmtOk);

readl (ioaddr + McstFramesRcvdOk);
readl (ioaddr + SingleColFrames);
readl (ioaddr + MultiColFrames);
readl (ioaddr + LateCollisions);
/* detailed rx errors */
readw (ioaddr + FrameTooLongErrors);
readw (ioaddr + InRangeLengthErrors);
readw (ioaddr + FramesCheckSeqErrors);
readw (ioaddr + FramesLostRxErrors);

/* detailed tx errors */
readw (ioaddr + FramesAbortXSColls);
readw (ioaddr + CarrierSenseErrors);

/* Clear all other statistic register. */
readl (ioaddr + McstOctetXmtOk);
readw (ioaddr + BcstFramesXmtdOk);
readl (ioaddr + McstFramesXmtdOk);
readw (ioaddr + BcstFramesRcvdOk);
readw (ioaddr + MacControlFramesRcvd);
readl (ioaddr + McstOctetXmtOk);
readl (ioaddr + BcstOctetXmtOk);
readl (ioaddr + McstFramesXmtdOk);
readl (ioaddr + FramesWDeferredXmt);
readw (ioaddr + BcstFramesXmtdOk);
readw (ioaddr + MacControlFramesXmtd);
readw (ioaddr + FramesWEXDeferal);
#ifdef MEM_MAPPING
for (i = 0x100; i <= 0x150; i += 4)
readl (ioaddr + i);
#endif
readw (ioaddr + TxJumboFrames);
readw (ioaddr + RxJumboFrames);
readw (ioaddr + TCPCheckSumErrors);
readw (ioaddr + UDPCheckSumErrors);
readw (ioaddr + IPCheckSumErrors);
return 0;
}

int
change_mtu (struct net_device *dev, int new_mtu)
{
struct netdev_private *np = dev->priv;
int max = (np->jumbo) ? MAX_JUMBO : 1536;

if ((new_mtu < 68) || (new_mtu > max)) {
return -EINVAL;
}

dev->mtu = new_mtu;

return 0;
}

static void
set_multicast (struct net_device *dev)
{
long ioaddr = dev->base_addr;
u32 hash_table[2];
u16 rx_mode = 0;
struct netdev_private *np = dev->priv;

hash_table[0] = hash_table[1] = 0;
/* RxFlowcontrol DA: 01-80-C2-00-00-01. Hash index=0x39 */
hash_table[1] |= cpu_to_le32(0x02000000);
if (dev->flags & IFF_PROMISC) {
/* Receive all frames promiscuously. */
rx_mode = ReceiveAllFrames;
} else if ((dev->flags & IFF_ALLMULTI) ||
(dev->mc_count > multicast_filter_limit)) {
/* Receive broadcast and multicast frames */
rx_mode = ReceiveBroadcast | ReceiveMulticast | ReceiveUnicast;
} else if (dev->mc_count > 0) {
int i;
struct dev_mc_list *mclist;
/* Receive broadcast frames and multicast frames filtering
by Hashtable */
rx_mode =
ReceiveBroadcast | ReceiveMulticastHash | ReceiveUnicast;
for (i=0, mclist = dev->mc_list; mclist && i < dev->mc_count;
i++, mclist=mclist->next)
{
int bit, index = 0;
int crc = ether_crc_le (ETH_ALEN, mclist->dmi_addr);
/* The inverted high significant 6 bits of CRC are
used as an index to hashtable */
for (bit = 0; bit < 6; bit++)
if (crc & (1 << (31 - bit)))
index |= (1 << bit);
hash_table[index / 32] |= (1 << (index % 32));
}
} else {
rx_mode = ReceiveBroadcast | ReceiveUnicast;
}
if (np->vlan) {
/* ReceiveVLANMatch field in ReceiveMode */
rx_mode |= ReceiveVLANMatch;
}

writel (hash_table[0], ioaddr + HashTable0);
writel (hash_table[1], ioaddr + HashTable1);
writew (rx_mode, ioaddr + ReceiveMode);
}

static int
rio_ethtool_ioctl (struct net_device *dev, void __user *useraddr)
{
struct netdev_private *np = dev->priv;
u32 ethcmd;

if (copy_from_user (&ethcmd, useraddr, sizeof (ethcmd)))
return -EFAULT;
switch (ethcmd) {
case ETHTOOL_GDRVINFO: {
struct ethtool_drvinfo info = { ETHTOOL_GDRVINFO };
strcpy(info.driver, "DL2K");
strcpy(info.version, DRV_VERSION);
strcpy(info.bus_info, pci_name(np->pdev));
memset(&info.fw_version, 0, sizeof(info.fw_version));
if (copy_to_user(useraddr, &info, sizeof(info)))
return -EFAULT;
return 0;
}

case ETHTOOL_GSET: {
struct ethtool_cmd cmd = { ETHTOOL_GSET };
if (np->phy_media) {
/* fiber device */
cmd.supported = SUPPORTED_Autoneg |
SUPPORTED_FIBRE;
cmd.advertising= ADVERTISED_Autoneg |
ADVERTISED_FIBRE;
cmd.port = PORT_FIBRE;
cmd.transceiver = XCVR_INTERNAL;
} else {
/* copper device */
cmd.supported = SUPPORTED_10baseT_Half |
SUPPORTED_10baseT_Full | SUPPORTED_100baseT_Half
| SUPPORTED_100baseT_Full | SUPPORTED_1000baseT_Full |
SUPPORTED_Autoneg | SUPPORTED_MII;
cmd.advertising = ADVERTISED_10baseT_Half |
ADVERTISED_10baseT_Full | ADVERTISED_100baseT_Half |
ADVERTISED_100baseT_Full | ADVERTISED_1000baseT_Full|
ADVERTISED_Autoneg | ADVERTISED_MII;
cmd.port = PORT_MII;
cmd.transceiver = XCVR_INTERNAL;
}
if ( np->link_status ) {
cmd.speed = np->speed;
cmd.duplex = np->full_duplex ?
DUPLEX_FULL : DUPLEX_HALF;
} else {
cmd.speed = -1;
cmd.duplex = -1;
}
if ( np->an_enable)
cmd.autoneg = AUTONEG_ENABLE;
else
cmd.autoneg = AUTONEG_DISABLE;

cmd.phy_address = np->phy_addr;

if (copy_to_user(useraddr, &cmd,
sizeof(cmd)))
return -EFAULT;
return 0;
}
case ETHTOOL_SSET: {
struct ethtool_cmd cmd;
if (copy_from_user(&cmd, useraddr, sizeof(cmd)))
return -EFAULT;
netif_carrier_off(dev);
if (cmd.autoneg == AUTONEG_ENABLE) {
if (np->an_enable)
return 0;
else {
np->an_enable = 1;
mii_set_media(dev);
return 0;
}
} else {
np->an_enable = 0;
if (np->speed == 1000){
cmd.speed = SPEED_100;
cmd.duplex = DUPLEX_FULL;
printk("Warning!! Can't disable Auto negotiation in 1000Mbps, change to Manul 100Mbps, Full duplex.\n");
}
switch(cmd.speed + cmd.duplex){

case SPEED_10 + DUPLEX_HALF:
np->speed = 10;
np->full_duplex = 0;
break;

case SPEED_10 + DUPLEX_FULL:
np->speed = 10;
np->full_duplex = 1;
break;
case SPEED_100 + DUPLEX_HALF:
np->speed = 100;
np->full_duplex = 0;
break;
case SPEED_100 + DUPLEX_FULL:
np->speed = 100;
np->full_duplex = 1;
break;
case SPEED_1000 + DUPLEX_HALF:/* not supported */
case SPEED_1000 + DUPLEX_FULL:/* not supported */
default:
return -EINVAL;
}
mii_set_media(dev);
}
return 0;
}
#ifdef ETHTOOL_GLINK
case ETHTOOL_GLINK:{
struct ethtool_value link = { ETHTOOL_GLINK };
link.data = np->link_status;
if (copy_to_user(useraddr, &link, sizeof(link)))
return -EFAULT;
return 0;
}
#endif
default:
return -EOPNOTSUPP;
}
}

static int
rio_ioctl (struct net_device *dev, struct ifreq *rq, int cmd)
{
int phy_addr;
struct netdev_private *np = dev->priv;
struct mii_data *miidata = (struct mii_data *) &rq->ifr_ifru;

struct netdev_desc *desc;
int i;

phy_addr = np->phy_addr;
switch (cmd) {
case SIOCETHTOOL:
return rio_ethtool_ioctl(dev, rq->ifr_data);
case SIOCDEVPRIVATE:
break;

case SIOCDEVPRIVATE + 1:
miidata->out_value = mii_read (dev, phy_addr, miidata->reg_num);
break;
case SIOCDEVPRIVATE + 2:
mii_write (dev, phy_addr, miidata->reg_num, miidata->in_value);
break;
case SIOCDEVPRIVATE + 3:
break;
case SIOCDEVPRIVATE + 4:
break;
case SIOCDEVPRIVATE + 5:
netif_stop_queue (dev);
break;
case SIOCDEVPRIVATE + 6:
netif_wake_queue (dev);
break;
case SIOCDEVPRIVATE + 7:
printk
("tx_full=%x cur_tx=%lx old_tx=%lx cur_rx=%lx old_rx=%lx\n",
netif_queue_stopped(dev), np->cur_tx, np->old_tx, np->cur_rx,
np->old_rx);
break;
case SIOCDEVPRIVATE + 8:
printk("TX ring:\n");
for (i = 0; i < TX_RING_SIZE; i++) {
desc = &np->tx_ring[i];
printk
("%02x:cur:%08x next:%08x status:%08x frag1:%08x frag0:%08x",
i,
(u32) (np->tx_ring_dma + i * sizeof (*desc)),
(u32) desc->next_desc,
(u32) desc->status, (u32) (desc->fraginfo >> 32),
(u32) desc->fraginfo);
printk ("\n");
}
printk ("\n");
break;

default:
return -EOPNOTSUPP;
}
return 0;
}

#define EEP_READ 0x0200
#define EEP_BUSY 0x8000
/* Read the EEPROM word */
/* We use I/O instruction to read/write eeprom to avoid fail on some machines */
int
read_eeprom (long ioaddr, int eep_addr)
{
int i = 1000;
outw (EEP_READ | (eep_addr & 0xff), ioaddr + EepromCtrl);
while (i-- > 0) {
if (!(inw (ioaddr + EepromCtrl) & EEP_BUSY)) {
return inw (ioaddr + EepromData);
}
}
return 0;
}

enum phy_ctrl_bits {
MII_READ = 0x00, MII_CLK = 0x01, MII_DATA1 = 0x02, MII_WRITE = 0x04,
MII_DUPLEX = 0x08,
};

#define mii_delay() readb(ioaddr)
static void
mii_sendbit (struct net_device *dev, u32 data)
{
long ioaddr = dev->base_addr + PhyCtrl;
data = (data) ? MII_DATA1 : 0;
data |= MII_WRITE;
data |= (readb (ioaddr) & 0xf8) | MII_WRITE;
writeb (data, ioaddr);
mii_delay ();
writeb (data | MII_CLK, ioaddr);
mii_delay ();
}

static int
mii_getbit (struct net_device *dev)
{
long ioaddr = dev->base_addr + PhyCtrl;
u8 data;

data = (readb (ioaddr) & 0xf8) | MII_READ;
writeb (data, ioaddr);
mii_delay ();
writeb (data | MII_CLK, ioaddr);
mii_delay ();
return ((readb (ioaddr) >> 1) & 1);
}

static void
mii_send_bits (struct net_device *dev, u32 data, int len)
{
int i;
for (i = len - 1; i >= 0; i--) {
mii_sendbit (dev, data & (1 << i));
}
}

static int
mii_read (struct net_device *dev, int phy_addr, int reg_num)
{
u32 cmd;
int i;
u32 retval = 0;

/* Preamble */
mii_send_bits (dev, 0xffffffff, 32);
/* ST(2), OP(2), ADDR(5), REG#(5), TA(2), Data(16) total 32 bits */
/* ST,OP = 0110'b for read operation */
cmd = (0x06 << 10 | phy_addr << 5 | reg_num);
mii_send_bits (dev, cmd, 14);
/* Turnaround */
if (mii_getbit (dev))
goto err_out;
/* Read data */
for (i = 0; i < 16; i++) {
retval |= mii_getbit (dev);
retval <<= 1;
}
/* End cycle */
mii_getbit (dev);
return (retval >> 1) & 0xffff;

err_out:
return 0;
}
static int
mii_write (struct net_device *dev, int phy_addr, int reg_num, u16 data)
{
u32 cmd;

/* Preamble */
mii_send_bits (dev, 0xffffffff, 32);
/* ST(2), OP(2), ADDR(5), REG#(5), TA(2), Data(16) total 32 bits */
/* ST,OP,AAAAA,RRRRR,TA = 0101xxxxxxxxxx10'b = 0x5002 for write */
cmd = (0x5002 << 16) | (phy_addr << 23) | (reg_num << 18) | data;
mii_send_bits (dev, cmd, 32);
/* End cycle */
mii_getbit (dev);
return 0;
}
static int
mii_wait_link (struct net_device *dev, int wait)
{
BMSR_t bmsr;
int phy_addr;
struct netdev_private *np;

np = dev->priv;
phy_addr = np->phy_addr;

do {
bmsr.image = mii_read (dev, phy_addr, MII_BMSR);
if (bmsr.bits.link_status)
return 0;
mdelay (1);
} while (--wait > 0);
return -1;
}
static int
mii_get_media (struct net_device *dev)
{
ANAR_t negotiate;
BMSR_t bmsr;
BMCR_t bmcr;
MSCR_t mscr;
MSSR_t mssr;
int phy_addr;
struct netdev_private *np;

np = dev->priv;
phy_addr = np->phy_addr;

bmsr.image = mii_read (dev, phy_addr, MII_BMSR);
if (np->an_enable) {
if (!bmsr.bits.an_complete) {
/* Auto-Negotiation not completed */
return -1;
}
negotiate.image = mii_read (dev, phy_addr, MII_ANAR) &
mii_read (dev, phy_addr, MII_ANLPAR);
mscr.image = mii_read (dev, phy_addr, MII_MSCR);
mssr.image = mii_read (dev, phy_addr, MII_MSSR);
if (mscr.bits.media_1000BT_FD & mssr.bits.lp_1000BT_FD) {
np->speed = 1000;
np->full_duplex = 1;
printk (KERN_INFO "Auto 1000 Mbps, Full duplex\n");
} else if (mscr.bits.media_1000BT_HD & mssr.bits.lp_1000BT_HD) {
np->speed = 1000;
np->full_duplex = 0;
printk (KERN_INFO "Auto 1000 Mbps, Half duplex\n");
} else if (negotiate.bits.media_100BX_FD) {
np->speed = 100;
np->full_duplex = 1;
printk (KERN_INFO "Auto 100 Mbps, Full duplex\n");
} else if (negotiate.bits.media_100BX_HD) {
np->speed = 100;
np->full_duplex = 0;
printk (KERN_INFO "Auto 100 Mbps, Half duplex\n");
} else if (negotiate.bits.media_10BT_FD) {
np->speed = 10;
np->full_duplex = 1;
printk (KERN_INFO "Auto 10 Mbps, Full duplex\n");
} else if (negotiate.bits.media_10BT_HD) {
np->speed = 10;
np->full_duplex = 0;
printk (KERN_INFO "Auto 10 Mbps, Half duplex\n");
}
if (negotiate.bits.pause) {
np->tx_flow &= 1;
np->rx_flow &= 1;
} else if (negotiate.bits.asymmetric) {
np->tx_flow = 0;
np->rx_flow &= 1;
}
/* else tx_flow, rx_flow = user select */
} else {
bmcr.image = mii_read (dev, phy_addr, MII_BMCR);
if (bmcr.bits.speed100 == 1 && bmcr.bits.speed1000 == 0) {
printk (KERN_INFO "Operating at 100 Mbps, ");
} else if (bmcr.bits.speed100 == 0 && bmcr.bits.speed1000 == 0) {
printk (KERN_INFO "Operating at 10 Mbps, ");
} else if (bmcr.bits.speed100 == 0 && bmcr.bits.speed1000 == 1) {
printk (KERN_INFO "Operating at 1000 Mbps, ");
}
if (bmcr.bits.duplex_mode) {
printk ("Full duplex\n");
} else {
printk ("Half duplex\n");
}
}
if (np->tx_flow)
printk(KERN_INFO "Enable Tx Flow Control\n");
else
printk(KERN_INFO "Disable Tx Flow Control\n");
if (np->rx_flow)
printk(KERN_INFO "Enable Rx Flow Control\n");
else
printk(KERN_INFO "Disable Rx Flow Control\n");

return 0;
}

static int
mii_set_media (struct net_device *dev)
{
PHY_SCR_t pscr;
BMCR_t bmcr;
BMSR_t bmsr;
ANAR_t anar;
int phy_addr;
struct netdev_private *np;
np = dev->priv;
phy_addr = np->phy_addr;

/* Does user set speed? */
if (np->an_enable) {
/* Advertise capabilities */
bmsr.image = mii_read (dev, phy_addr, MII_BMSR);
anar.image = mii_read (dev, phy_addr, MII_ANAR);
anar.bits.media_100BX_FD = bmsr.bits.media_100BX_FD;
anar.bits.media_100BX_HD = bmsr.bits.media_100BX_HD;
anar.bits.media_100BT4 = bmsr.bits.media_100BT4;
anar.bits.media_10BT_FD = bmsr.bits.media_10BT_FD;
anar.bits.media_10BT_HD = bmsr.bits.media_10BT_HD;
anar.bits.pause = 1;
anar.bits.asymmetric = 1;
mii_write (dev, phy_addr, MII_ANAR, anar.image);

/* Enable Auto crossover */
pscr.image = mii_read (dev, phy_addr, MII_PHY_SCR);
pscr.bits.mdi_crossover_mode = 3; /* 11'b */
mii_write (dev, phy_addr, MII_PHY_SCR, pscr.image);

/* Soft reset PHY */
mii_write (dev, phy_addr, MII_BMCR, MII_BMCR_RESET);
bmcr.image = 0;
bmcr.bits.an_enable = 1;
bmcr.bits.restart_an = 1;
bmcr.bits.reset = 1;
mii_write (dev, phy_addr, MII_BMCR, bmcr.image);
mdelay(1);
} else {
/* Force speed setting */
/* 1) Disable Auto crossover */
pscr.image = mii_read (dev, phy_addr, MII_PHY_SCR);
pscr.bits.mdi_crossover_mode = 0;
mii_write (dev, phy_addr, MII_PHY_SCR, pscr.image);

/* 2) PHY Reset */
bmcr.image = mii_read (dev, phy_addr, MII_BMCR);
bmcr.bits.reset = 1;
mii_write (dev, phy_addr, MII_BMCR, bmcr.image);

/* 3) Power Down */
bmcr.image = 0x1940; /* must be 0x1940 */
mii_write (dev, phy_addr, MII_BMCR, bmcr.image);
mdelay (100); /* wait a certain time */

/* 4) Advertise nothing */
mii_write (dev, phy_addr, MII_ANAR, 0);

/* 5) Set media and Power Up */
bmcr.image = 0;
bmcr.bits.power_down = 1;
if (np->speed == 100) {
bmcr.bits.speed100 = 1;
bmcr.bits.speed1000 = 0;
printk (KERN_INFO "Manual 100 Mbps, ");
} else if (np->speed == 10) {
bmcr.bits.speed100 = 0;
bmcr.bits.speed1000 = 0;
printk (KERN_INFO "Manual 10 Mbps, ");
}
if (np->full_duplex) {
bmcr.bits.duplex_mode = 1;
printk ("Full duplex\n");
} else {
bmcr.bits.duplex_mode = 0;
printk ("Half duplex\n");
}
#if 0
/* Set 1000BaseT Master/Slave setting */
mscr.image = mii_read (dev, phy_addr, MII_MSCR);
mscr.bits.cfg_enable = 1;
mscr.bits.cfg_value = 0;
#endif
mii_write (dev, phy_addr, MII_BMCR, bmcr.image);
mdelay(10);
}
return 0;
}

static int
mii_get_media_pcs (struct net_device *dev)
{
ANAR_PCS_t negotiate;
BMSR_t bmsr;
BMCR_t bmcr;
int phy_addr;
struct netdev_private *np;

np = dev->priv;
phy_addr = np->phy_addr;

bmsr.image = mii_read (dev, phy_addr, PCS_BMSR);
if (np->an_enable) {
if (!bmsr.bits.an_complete) {
/* Auto-Negotiation not completed */
return -1;
}
negotiate.image = mii_read (dev, phy_addr, PCS_ANAR) &
mii_read (dev, phy_addr, PCS_ANLPAR);
np->speed = 1000;
if (negotiate.bits.full_duplex) {
printk (KERN_INFO "Auto 1000 Mbps, Full duplex\n");
np->full_duplex = 1;
} else {
printk (KERN_INFO "Auto 1000 Mbps, half duplex\n");
np->full_duplex = 0;
}
if (negotiate.bits.pause) {
np->tx_flow &= 1;
np->rx_flow &= 1;
} else if (negotiate.bits.asymmetric) {
np->tx_flow = 0;
np->rx_flow &= 1;
}
/* else tx_flow, rx_flow = user select */
} else {
bmcr.image = mii_read (dev, phy_addr, PCS_BMCR);
printk (KERN_INFO "Operating at 1000 Mbps, ");
if (bmcr.bits.duplex_mode) {
printk ("Full duplex\n");
} else {
printk ("Half duplex\n");
}
}
if (np->tx_flow)
printk(KERN_INFO "Enable Tx Flow Control\n");
else
printk(KERN_INFO "Disable Tx Flow Control\n");
if (np->rx_flow)
printk(KERN_INFO "Enable Rx Flow Control\n");
else
printk(KERN_INFO "Disable Rx Flow Control\n");

return 0;
}

static int
mii_set_media_pcs (struct net_device *dev)
{
BMCR_t bmcr;
ESR_t esr;
ANAR_PCS_t anar;
int phy_addr;
struct netdev_private *np;
np = dev->priv;
phy_addr = np->phy_addr;

/* Auto-Negotiation? */
if (np->an_enable) {
/* Advertise capabilities */
esr.image = mii_read (dev, phy_addr, PCS_ESR);
anar.image = mii_read (dev, phy_addr, MII_ANAR);
anar.bits.half_duplex =
esr.bits.media_1000BT_HD | esr.bits.media_1000BX_HD;
anar.bits.full_duplex =
esr.bits.media_1000BT_FD | esr.bits.media_1000BX_FD;
anar.bits.pause = 1;
anar.bits.asymmetric = 1;
mii_write (dev, phy_addr, MII_ANAR, anar.image);

/* Soft reset PHY */
mii_write (dev, phy_addr, MII_BMCR, MII_BMCR_RESET);
bmcr.image = 0;
bmcr.bits.an_enable = 1;
bmcr.bits.restart_an = 1;
bmcr.bits.reset = 1;
mii_write (dev, phy_addr, MII_BMCR, bmcr.image);
mdelay(1);
} else {
/* Force speed setting */
/* PHY Reset */
bmcr.image = 0;
bmcr.bits.reset = 1;
mii_write (dev, phy_addr, MII_BMCR, bmcr.image);
mdelay(10);
bmcr.image = 0;
bmcr.bits.an_enable = 0;
if (np->full_duplex) {
bmcr.bits.duplex_mode = 1;
printk (KERN_INFO "Manual full duplex\n");
} else {
bmcr.bits.duplex_mode = 0;
printk (KERN_INFO "Manual half duplex\n");
}
mii_write (dev, phy_addr, MII_BMCR, bmcr.image);
mdelay(10);

/* Advertise nothing */
mii_write (dev, phy_addr, MII_ANAR, 0);
}
return 0;
}

static int
rio_close (struct net_device *dev)
{
long ioaddr = dev->base_addr;
struct netdev_private *np = dev->priv;
struct sk_buff *skb;
int i;

netif_stop_queue (dev);

/* Disable interrupts */
writew (0, ioaddr + IntEnable);

/* Stop Tx and Rx logics */
writel (TxDisable | RxDisable | StatsDisable, ioaddr + MACCtrl);
synchronize_irq (dev->irq);
free_irq (dev->irq, dev);
del_timer_sync (&np->timer);

/* Free all the skbuffs in the queue. */
for (i = 0; i < RX_RING_SIZE; i++) {
np->rx_ring[i].status = 0;
np->rx_ring[i].fraginfo = 0;
skb = np->rx_skbuff[i];
if (skb) {
pci_unmap_single (np->pdev, np->rx_ring[i].fraginfo,
skb->len, PCI_DMA_FROMDEVICE);
dev_kfree_skb (skb);
np->rx_skbuff[i] = NULL;
}
}
for (i = 0; i < TX_RING_SIZE; i++) {
skb = np->tx_skbuff[i];
if (skb) {
pci_unmap_single (np->pdev, np->tx_ring[i].fraginfo,
skb->len, PCI_DMA_TODEVICE);
dev_kfree_skb (skb);
np->tx_skbuff[i] = NULL;
}
}

return 0;
}

static void __devexit
rio_remove1 (struct pci_dev *pdev)
{
struct net_device *dev = pci_get_drvdata (pdev);

if (dev) {
struct netdev_private *np = dev->priv;

unregister_netdev (dev);
pci_free_consistent (pdev, RX_TOTAL_SIZE, np->rx_ring,
np->rx_ring_dma);
pci_free_consistent (pdev, TX_TOTAL_SIZE, np->tx_ring,
np->tx_ring_dma);
#ifdef MEM_MAPPING
iounmap ((char *) (dev->base_addr));
#endif
free_netdev (dev);
pci_release_regions (pdev);
pci_disable_device (pdev);
}
pci_set_drvdata (pdev, NULL);
}

static struct pci_driver rio_driver = {
.name = "dl2k",
.id_table = rio_pci_tbl,
.probe = rio_probe1,
.remove = __devexit_p(rio_remove1),
};

static int __init
rio_init (void)
{
return pci_module_init (&rio_driver);
}

static void __exit
rio_exit (void)
{
pci_unregister_driver (&rio_driver);
}

module_init (rio_init);
module_exit (rio_exit);

/*

Compile command:

gcc -D__KERNEL__ -DMODULE -I/usr/src/linux/include -Wall -Wstrict-prototypes -O2 -c dl2k.c

Read Documentation/networking/dl2k.txt for details.

*/