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tg3: Allow ethtool to enable/disable loopback. 

This patch adds tg3_set_features() to handle loopback mode. Currently the
capability is added for the devices which support internal MAC loopback mode.
So when enabled, it enables internal-MAC loopback.

Signed-off-by: Mahesh Bandewar <maheshb@google.com>
Signed-off-by: David S. Miller <davem@davemloft.net>
This commit is contained in:
Mahesh Bandewar 2011-05-08 06:51:48 +00:00 committed by David S. Miller
parent cbfd1526f6
commit 06c03c02ea
1 changed files with 67 additions and 2 deletions
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69
drivers/net/tg3.c
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@ -3373,8 +3373,8 @@ static int tg3_setup_copper_phy(struct tg3 *tp, int force_reset)
tg3_phy_copper_begin(tp);
tg3_readphy(tp, MII_BMSR, &bmsr);
if (!tg3_readphy(tp, MII_BMSR, &bmsr) &&
(bmsr & BMSR_LSTATUS))
if ((!tg3_readphy(tp, MII_BMSR, &bmsr) && (bmsr & BMSR_LSTATUS)) ||
(tp->mac_mode & MAC_MODE_PORT_INT_LPBACK))
current_link_up = 1;
}
@ -6309,6 +6309,42 @@ static netdev_tx_t tg3_start_xmit_dma_bug(struct sk_buff *skb,
return NETDEV_TX_OK;
}
static void tg3_set_loopback(struct net_device *dev, u32 features)
{
struct tg3 *tp = netdev_priv(dev);
if (features & NETIF_F_LOOPBACK) {
if (tp->mac_mode & MAC_MODE_PORT_INT_LPBACK)
return;
/*
* Clear MAC_MODE_HALF_DUPLEX or you won't get packets back in
* loopback mode if Half-Duplex mode was negotiated earlier.
*/
tp->mac_mode &= ~MAC_MODE_HALF_DUPLEX;
/* Enable internal MAC loopback mode */
tp->mac_mode |= MAC_MODE_PORT_INT_LPBACK;
spin_lock_bh(&tp->lock);
tw32(MAC_MODE, tp->mac_mode);
netif_carrier_on(tp->dev);
spin_unlock_bh(&tp->lock);
netdev_info(dev, "Internal MAC loopback mode enabled.\n");
} else {
if (!(tp->mac_mode & MAC_MODE_PORT_INT_LPBACK))
return;
/* Disable internal MAC loopback mode */
tp->mac_mode &= ~MAC_MODE_PORT_INT_LPBACK;
spin_lock_bh(&tp->lock);
tw32(MAC_MODE, tp->mac_mode);
/* Force link status check */
tg3_setup_phy(tp, 1);
spin_unlock_bh(&tp->lock);
netdev_info(dev, "Internal MAC loopback mode disabled.\n");
}
}
static u32 tg3_fix_features(struct net_device *dev, u32 features)
{
struct tg3 *tp = netdev_priv(dev);
@ -6319,6 +6355,16 @@ static u32 tg3_fix_features(struct net_device *dev, u32 features)
return features;
}
static int tg3_set_features(struct net_device *dev, u32 features)
{
u32 changed = dev->features ^ features;
if ((changed & NETIF_F_LOOPBACK) && netif_running(dev))
tg3_set_loopback(dev, features);
return 0;
}
static inline void tg3_set_mtu(struct net_device *dev, struct tg3 *tp,
int new_mtu)
{
@ -9485,6 +9531,13 @@ static int tg3_open(struct net_device *dev)
netif_tx_start_all_queues(dev);
/*
* Reset loopback feature if it was turned on while the device was down
* make sure that it's installed properly now.
*/
if (dev->features & NETIF_F_LOOPBACK)
tg3_set_loopback(dev, dev->features);
return 0;
err_out3:
@ -15033,6 +15086,7 @@ static const struct net_device_ops tg3_netdev_ops = {
.ndo_tx_timeout = tg3_tx_timeout,
.ndo_change_mtu = tg3_change_mtu,
.ndo_fix_features = tg3_fix_features,
.ndo_set_features = tg3_set_features,
#ifdef CONFIG_NET_POLL_CONTROLLER
.ndo_poll_controller = tg3_poll_controller,
#endif
@ -15049,6 +15103,7 @@ static const struct net_device_ops tg3_netdev_ops_dma_bug = {
.ndo_do_ioctl = tg3_ioctl,
.ndo_tx_timeout = tg3_tx_timeout,
.ndo_change_mtu = tg3_change_mtu,
.ndo_set_features = tg3_set_features,
#ifdef CONFIG_NET_POLL_CONTROLLER
.ndo_poll_controller = tg3_poll_controller,
#endif
@ -15246,6 +15301,16 @@ static int __devinit tg3_init_one(struct pci_dev *pdev,
dev->features |= hw_features;
dev->vlan_features |= hw_features;
/*
* Add loopback capability only for a subset of devices that support
* MAC-LOOPBACK. Eventually this need to be enhanced to allow INT-PHY
* loopback for the remaining devices.
*/
if (GET_ASIC_REV(tp->pci_chip_rev_id) != ASIC_REV_5780 &&
!tg3_flag(tp, CPMU_PRESENT))
/* Add the loopback capability */
dev->hw_features |= NETIF_F_LOOPBACK;
if (tp->pci_chip_rev_id == CHIPREV_ID_5705_A1 &&
!tg3_flag(tp, TSO_CAPABLE) &&
!(tr32(TG3PCI_PCISTATE) & PCISTATE_BUS_SPEED_HIGH)) {