ixgbe: Enable Jumbo Frames on the X540 10Gigabit Controller
The X540 controller supports jumbo frames in SR-IOV mode. Allow
configuration of jumbo frames either in the PF driver or on behalf of
a VF.
Signed-off-by: Greg Rose <gregory.v.rose@intel.com>
Signed-off-by: Jeff Kirsher <jeffrey.t.kirsher@intel.com>
diff --git a/drivers/net/ixgbe/ixgbe_main.c b/drivers/net/ixgbe/ixgbe_main.c
index eca762d..f0d0c5a 100644
--- a/drivers/net/ixgbe/ixgbe_main.c
+++ b/drivers/net/ixgbe/ixgbe_main.c
@@ -3077,6 +3077,14 @@
ixgbe_configure_srrctl(adapter, ring);
ixgbe_configure_rscctl(adapter, ring);
+ /* If operating in IOV mode set RLPML for X540 */
+ if ((adapter->flags & IXGBE_FLAG_SRIOV_ENABLED) &&
+ hw->mac.type == ixgbe_mac_X540) {
+ rxdctl &= ~IXGBE_RXDCTL_RLPMLMASK;
+ rxdctl |= ((ring->netdev->mtu + ETH_HLEN +
+ ETH_FCS_LEN + VLAN_HLEN) | IXGBE_RXDCTL_RLPML_EN);
+ }
+
if (hw->mac.type == ixgbe_mac_82598EB) {
/*
* enable cache line friendly hardware writes:
@@ -5441,8 +5449,14 @@
int max_frame = new_mtu + ETH_HLEN + ETH_FCS_LEN;
/* MTU < 68 is an error and causes problems on some kernels */
- if ((new_mtu < 68) || (max_frame > IXGBE_MAX_JUMBO_FRAME_SIZE))
- return -EINVAL;
+ if (adapter->flags & IXGBE_FLAG_SRIOV_ENABLED &&
+ hw->mac.type != ixgbe_mac_X540) {
+ if ((new_mtu < 68) || (max_frame > MAXIMUM_ETHERNET_VLAN_SIZE))
+ return -EINVAL;
+ } else {
+ if ((new_mtu < 68) || (max_frame > IXGBE_MAX_JUMBO_FRAME_SIZE))
+ return -EINVAL;
+ }
e_info(probe, "changing MTU from %d to %d\n", netdev->mtu, new_mtu);
/* must set new MTU before calling down or up */