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8139too: Support RX-ALL logic. 

This allows the NIC to receive Runts and frames with bad
Ethernet Frame Checksums (FCS).

Useful to sniffing & diagnosing bad networks.

Signed-off-by: Ben Greear <greearb@candelatech.com>
This commit is contained in:
Ben Greear 2012-02-10 15:04:31 +00:00 committed by Jeff Kirsher
parent b0d1562c82
commit d95089dc54
1 changed files with 52 additions and 0 deletions
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52
drivers/net/ethernet/realtek/8139too.c
View File

@ -907,6 +907,33 @@ static __devinit struct net_device * rtl8139_init_board (struct pci_dev *pdev)
return ERR_PTR(rc);
}
static int rtl8139_set_features(struct net_device *dev, netdev_features_t features)
{
struct rtl8139_private *tp = netdev_priv(dev);
unsigned long flags;
netdev_features_t changed = features ^ dev->features;
void __iomem *ioaddr = tp->mmio_addr;
if (!(changed & (NETIF_F_RXALL)))
return 0;
spin_lock_irqsave(&tp->lock, flags);
if (changed & NETIF_F_RXALL) {
int rx_mode = tp->rx_config;
if (features & NETIF_F_RXALL)
rx_mode |= (AcceptErr | AcceptRunt);
else
rx_mode &= ~(AcceptErr | AcceptRunt);
tp->rx_config = rtl8139_rx_config | rx_mode;
RTL_W32_F(RxConfig, tp->rx_config);
}
spin_unlock_irqrestore(&tp->lock, flags);
return 0;
}
static const struct net_device_ops rtl8139_netdev_ops = {
.ndo_open = rtl8139_open,
.ndo_stop = rtl8139_close,
@ -921,6 +948,7 @@ static const struct net_device_ops rtl8139_netdev_ops = {
#ifdef CONFIG_NET_POLL_CONTROLLER
.ndo_poll_controller = rtl8139_poll_controller,
#endif
.ndo_set_features = rtl8139_set_features,
};
static int __devinit rtl8139_init_one (struct pci_dev *pdev,
@ -994,6 +1022,8 @@ static int __devinit rtl8139_init_one (struct pci_dev *pdev,
dev->features |= NETIF_F_SG | NETIF_F_HW_CSUM | NETIF_F_HIGHDMA;
dev->vlan_features = dev->features;
dev->hw_features |= NETIF_F_RXALL;
dev->irq = pdev->irq;
/* tp zeroed and aligned in alloc_etherdev */
@ -1978,11 +2008,30 @@ static int rtl8139_rx(struct net_device *dev, struct rtl8139_private *tp,
if (unlikely((rx_size > (MAX_ETH_FRAME_SIZE+4)) ||
(rx_size < 8) ||
(!(rx_status & RxStatusOK)))) {
if ((dev->features & NETIF_F_RXALL) &&
(rx_size <= (MAX_ETH_FRAME_SIZE + 4)) &&
(rx_size >= 8) &&
(!(rx_status & RxStatusOK))) {
/* Length is at least mostly OK, but pkt has
* error. I'm hoping we can handle some of these
* errors without resetting the chip. --Ben
*/
dev->stats.rx_errors++;
if (rx_status & RxCRCErr) {
dev->stats.rx_crc_errors++;
goto keep_pkt;
}
if (rx_status & RxRunt) {
dev->stats.rx_length_errors++;
goto keep_pkt;
}
}
rtl8139_rx_err (rx_status, dev, tp, ioaddr);
received = -1;
goto out;
}
keep_pkt:
/* Malloc up new buffer, compatible with net-2e. */
/* Omit the four octet CRC from the length. */
@ -2515,6 +2564,9 @@ static void __set_rx_mode (struct net_device *dev)
}
}
if (dev->features & NETIF_F_RXALL)
rx_mode |= (AcceptErr | AcceptRunt);
/* We can safely update without stopping the chip. */
tmp = rtl8139_rx_config | rx_mode;
if (tp->rx_config != tmp) {