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Merge branch '10GbE' of git://git.kernel.org/pub/scm/linux/kernel/git/tnguy/net-queue 

Tony Nguyen says:

====================
Intel Wired LAN Driver Updates 2023-02-14 (ixgbe, i40e)

This series contains updates to ixgbe and i40e drivers.

Jason Xing corrects comparison of frame sizes for setting MTU with XDP on
ixgbe and adjusts frame size to account for a second VLAN header on ixgbe
and i40e.

* '10GbE' of git://git.kernel.org/pub/scm/linux/kernel/git/tnguy/net-queue:
  ixgbe: add double of VLAN header when computing the max MTU
  i40e: add double of VLAN header when computing the max MTU
  ixgbe: allow to increase MTU to 3K with XDP enabled
====================

Link: https://lore.kernel.org/r/20230214185146.1305819-1-anthony.l.nguyen@intel.com
Signed-off-by: Jakub Kicinski <kuba@kernel.org>
This commit is contained in:
Jakub Kicinski 2023-02-15 19:20:58 -08:00
parent fda6c89fe3 0967bf8377
commit dee4bf7167
3 changed files with 20 additions and 12 deletions
Show Stats Download Patch File Download Diff File Expand all files Collapse all files

2
drivers/net/ethernet/intel/i40e/i40e_main.c
View File

@ -2921,7 +2921,7 @@ static int i40e_change_mtu(struct net_device *netdev, int new_mtu)
struct i40e_pf *pf = vsi->back;
if (i40e_enabled_xdp_vsi(vsi)) {
int frame_size = new_mtu + ETH_HLEN + ETH_FCS_LEN + VLAN_HLEN;
int frame_size = new_mtu + I40E_PACKET_HDR_PAD;
if (frame_size > i40e_max_xdp_frame_size(vsi))
return -EINVAL;

2
drivers/net/ethernet/intel/ixgbe/ixgbe.h
View File

@ -73,6 +73,8 @@
#define IXGBE_RXBUFFER_4K 4096
#define IXGBE_MAX_RXBUFFER 16384 /* largest size for a single descriptor */
#define IXGBE_PKT_HDR_PAD (ETH_HLEN + ETH_FCS_LEN + (VLAN_HLEN * 2))
/* Attempt to maximize the headroom available for incoming frames. We
* use a 2K buffer for receives and need 1536/1534 to store the data for
* the frame. This leaves us with 512 bytes of room. From that we need

28
drivers/net/ethernet/intel/ixgbe/ixgbe_main.c
View File

@ -6777,6 +6777,18 @@ static void ixgbe_free_all_rx_resources(struct ixgbe_adapter *adapter)
ixgbe_free_rx_resources(adapter->rx_ring[i]);
}
/**
* ixgbe_max_xdp_frame_size - returns the maximum allowed frame size for XDP
* @adapter: device handle, pointer to adapter
*/
static int ixgbe_max_xdp_frame_size(struct ixgbe_adapter *adapter)
{
if (PAGE_SIZE >= 8192 || adapter->flags2 & IXGBE_FLAG2_RX_LEGACY)
return IXGBE_RXBUFFER_2K;
else
return IXGBE_RXBUFFER_3K;
}
/**
* ixgbe_change_mtu - Change the Maximum Transfer Unit
* @netdev: network interface device structure
@ -6788,18 +6800,12 @@ static int ixgbe_change_mtu(struct net_device *netdev, int new_mtu)
{
struct ixgbe_adapter *adapter = netdev_priv(netdev);
if (adapter->xdp_prog) {
int new_frame_size = new_mtu + ETH_HLEN + ETH_FCS_LEN +
VLAN_HLEN;
int i;
if (ixgbe_enabled_xdp_adapter(adapter)) {
int new_frame_size = new_mtu + IXGBE_PKT_HDR_PAD;
for (i = 0; i < adapter->num_rx_queues; i++) {
struct ixgbe_ring *ring = adapter->rx_ring[i];
if (new_frame_size > ixgbe_rx_bufsz(ring)) {
e_warn(probe, "Requested MTU size is not supported with XDP\n");
return -EINVAL;
}
if (new_frame_size > ixgbe_max_xdp_frame_size(adapter)) {
e_warn(probe, "Requested MTU size is not supported with XDP\n");
return -EINVAL;
}
}