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e1000e: Disable TSO on i219-LM card to increase speed

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While using i219-LM card currently it was only possible to achieve
about 60% of maximum speed due to regression introduced in Linux 5.8.
This was caused by TSO not being disabled by default despite commit
f29801030a ("e1000e: Disable TSO for buffer overrun workaround").
Fix that by disabling TSO during driver probe.

Fixes: f29801030a ("e1000e: Disable TSO for buffer overrun workaround")
Signed-off-by: Sebastian Basierski <sebastianx.basierski@intel.com>
Signed-off-by: Mateusz Palczewski <mateusz.palczewski@intel.com>
Tested-by: Naama Meir <naamax.meir@linux.intel.com>
Signed-off-by: Tony Nguyen <anthony.l.nguyen@intel.com>
Reviewed-by: Simon Horman <simon.horman@corigine.com>
Link: https://lore.kernel.org/r/20230417205345.1030801-1-anthony.l.nguyen@intel.com
Signed-off-by: Jakub Kicinski <kuba@kernel.org>
This commit is contained in:
Sebastian Basierski 2023-04-17 13:53:45 -07:00 committed by Jakub Kicinski
parent 8c154d272c
commit 67d47b9511
1 changed files with 26 additions and 25 deletions
Show Stats Download Patch File Download Diff File Expand all files Collapse all files

51
drivers/net/ethernet/intel/e1000e/netdev.c
View File

@ -5288,31 +5288,6 @@ static void e1000_watchdog_task(struct work_struct *work)
ew32(TARC(0), tarc0);
}
/* disable TSO for pcie and 10/100 speeds, to avoid
* some hardware issues
*/
if (!(adapter->flags & FLAG_TSO_FORCE)) {
switch (adapter->link_speed) {
case SPEED_10:
case SPEED_100:
e_info("10/100 speed: disabling TSO\n");
netdev->features &= ~NETIF_F_TSO;
netdev->features &= ~NETIF_F_TSO6;
break;
case SPEED_1000:
netdev->features |= NETIF_F_TSO;
netdev->features |= NETIF_F_TSO6;
break;
default:
/* oops */
break;
}
if (hw->mac.type == e1000_pch_spt) {
netdev->features &= ~NETIF_F_TSO;
netdev->features &= ~NETIF_F_TSO6;
}
}
/* enable transmits in the hardware, need to do this
* after setting TARC(0)
*/
@ -7526,6 +7501,32 @@ static int e1000_probe(struct pci_dev *pdev, const struct pci_device_id *ent)
NETIF_F_RXCSUM |
NETIF_F_HW_CSUM);
/* disable TSO for pcie and 10/100 speeds to avoid
* some hardware issues and for i219 to fix transfer
* speed being capped at 60%
*/
if (!(adapter->flags & FLAG_TSO_FORCE)) {
switch (adapter->link_speed) {
case SPEED_10:
case SPEED_100:
e_info("10/100 speed: disabling TSO\n");
netdev->features &= ~NETIF_F_TSO;
netdev->features &= ~NETIF_F_TSO6;
break;
case SPEED_1000:
netdev->features |= NETIF_F_TSO;
netdev->features |= NETIF_F_TSO6;
break;
default:
/* oops */
break;
}
if (hw->mac.type == e1000_pch_spt) {
netdev->features &= ~NETIF_F_TSO;
netdev->features &= ~NETIF_F_TSO6;
}
}
/* Set user-changeable features (subset of all device features) */
netdev->hw_features = netdev->features;
netdev->hw_features |= NETIF_F_RXFCS;