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bnx2x: Prevent inner-reload while VFs exist 

On some feature changes, driver employes an inner-reload flow where it
resets the function and re-configures it with the new required set of
parameters.

Such a flow proves fatal to any VF since those were not intended to be used
while HW is being reset underneath, causing them [at best] to lose all
connectivity.

This changes driver behavior to fail all configuration changes [e.g., mtu
change] requested of the driver in case VFs are active.

Signed-off-by: Yuval Mintz <Yuval.Mintz@qlogic.com>
Signed-off-by: Ariel Elior <Ariel.Elior@qlogic.com>
Signed-off-by: David S. Miller <davem@davemloft.net>
This commit is contained in:
Yuval Mintz 2015-04-22 12:47:32 +03:00 committed by David S. Miller
parent a2c3935aaa
commit 909d9faae2
2 changed files with 51 additions and 9 deletions
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43
drivers/net/ethernet/broadcom/bnx2x/bnx2x_cmn.c
View File

@ -4809,6 +4809,23 @@ netdev_features_t bnx2x_fix_features(struct net_device *dev,
{
struct bnx2x *bp = netdev_priv(dev);
if (pci_num_vf(bp->pdev)) {
netdev_features_t changed = dev->features ^ features;
/* Revert the requested changes in features if they
* would require internal reload of PF in bnx2x_set_features().
*/
if (!(features & NETIF_F_RXCSUM) && !bp->disable_tpa) {
features &= ~NETIF_F_RXCSUM;
features |= dev->features & NETIF_F_RXCSUM;
}
if (changed & NETIF_F_LOOPBACK) {
features &= ~NETIF_F_LOOPBACK;
features |= dev->features & NETIF_F_LOOPBACK;
}
}
/* TPA requires Rx CSUM offloading */
if (!(features & NETIF_F_RXCSUM)) {
features &= ~NETIF_F_LRO;
@ -4839,15 +4856,18 @@ int bnx2x_set_features(struct net_device *dev, netdev_features_t features)
else
flags &= ~GRO_ENABLE_FLAG;
if (features & NETIF_F_LOOPBACK) {
if (bp->link_params.loopback_mode != LOOPBACK_BMAC) {
bp->link_params.loopback_mode = LOOPBACK_BMAC;
bnx2x_reload = true;
}
} else {
if (bp->link_params.loopback_mode != LOOPBACK_NONE) {
bp->link_params.loopback_mode = LOOPBACK_NONE;
bnx2x_reload = true;
/* VFs or non SRIOV PFs should be able to change loopback feature */
if (!pci_num_vf(bp->pdev)) {
if (features & NETIF_F_LOOPBACK) {
if (bp->link_params.loopback_mode != LOOPBACK_BMAC) {
bp->link_params.loopback_mode = LOOPBACK_BMAC;
bnx2x_reload = true;
}
} else {
if (bp->link_params.loopback_mode != LOOPBACK_NONE) {
bp->link_params.loopback_mode = LOOPBACK_NONE;
bnx2x_reload = true;
}
}
}
@ -4931,6 +4951,11 @@ int bnx2x_resume(struct pci_dev *pdev)
}
bp = netdev_priv(dev);
if (pci_num_vf(bp->pdev)) {
DP(BNX2X_MSG_IOV, "VFs are enabled, can not change MTU\n");
return -EPERM;
}
if (bp->recovery_state != BNX2X_RECOVERY_DONE) {
BNX2X_ERR("Handling parity error recovery. Try again later\n");
return -EAGAIN;

17
drivers/net/ethernet/broadcom/bnx2x/bnx2x_ethtool.c
View File

@ -1843,6 +1843,12 @@ static int bnx2x_set_ringparam(struct net_device *dev,
"set ring params command parameters: rx_pending = %d, tx_pending = %d\n",
ering->rx_pending, ering->tx_pending);
if (pci_num_vf(bp->pdev)) {
DP(BNX2X_MSG_IOV,
"VFs are enabled, can not change ring parameters\n");
return -EPERM;
}
if (bp->recovery_state != BNX2X_RECOVERY_DONE) {
DP(BNX2X_MSG_ETHTOOL,
"Handling parity error recovery. Try again later\n");
@ -2899,6 +2905,12 @@ static void bnx2x_self_test(struct net_device *dev,
u8 is_serdes, link_up;
int rc, cnt = 0;
if (pci_num_vf(bp->pdev)) {
DP(BNX2X_MSG_IOV,
"VFs are enabled, can not perform self test\n");
return;
}
if (bp->recovery_state != BNX2X_RECOVERY_DONE) {
netdev_err(bp->dev,
"Handling parity error recovery. Try again later\n");
@ -3468,6 +3480,11 @@ static int bnx2x_set_channels(struct net_device *dev,
channels->rx_count, channels->tx_count, channels->other_count,
channels->combined_count);
if (pci_num_vf(bp->pdev)) {
DP(BNX2X_MSG_IOV, "VFs are enabled, can not set channels\n");
return -EPERM;
}
/* We don't support separate rx / tx channels.
* We don't allow setting 'other' channels.
*/