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| author |   Jesse Brandeburg <jesse.brandeburg@intel.com> | 2022-07-27 09:24:05 +0200 |
|---|---|---|
| committer |   Tony Nguyen <anthony.l.nguyen@intel.com> | 2022-08-18 08:08:23 -0700 |
| commit | dddd406d9dbe4a94919b377a84b696e97f709379 (patch) | |
| tree | 8bc58b69f58b12d208372c4ec168e4bb899cf66d /drivers/net/ethernet/intel/ice/ice_lib.h | |
| parent | stmmac: intel: remove unused 'has_crossts' flag (diff) | |
| download | linux-dev-dddd406d9dbe4a94919b377a84b696e97f709379.tar.xz linux-dev-dddd406d9dbe4a94919b377a84b696e97f709379.zip | |
ice: Implement control of FCS/CRC stripping
The driver can allow the user to configure whether the CRC aka the FCS
(Frame Check Sequence) is DMA'd to the host as part of the receive
buffer. The driver usually wants this feature disabled so that the
hardware checks the FCS and strips it in order to save PCI bandwidth.
Control the reception of FCS to the host using the command:
ethtool -K eth0 rx-fcs <on|off>
The default shown in ethtool -k eth0 | grep fcs; should be "off", as the
hardware will drop any frame with a bad checksum, and DMA of the
checksum is useless overhead especially for small packets.
Testing Hints:
test the FCS/CRC arrives with received packets using
tcpdump -nnpi eth0 -xxxx
and it should show crc data as the last 4 bytes of the packet. Can also
use wireshark to turn on CRC checking and check the data is correct.
Signed-off-by: Jesse Brandeburg <jesse.brandeburg@intel.com>
Co-developed-by: Grzegorz Nitka <grzegorz.nitka@intel.com>
Signed-off-by: Grzegorz Nitka <grzegorz.nitka@intel.com>
Co-developed-by: Benjamin Mikailenko <benjamin.mikailenko@intel.com>
Signed-off-by: Benjamin Mikailenko <benjamin.mikailenko@intel.com>
Co-developed-by: Anatolii Gerasymenko <anatolii.gerasymenko@intel.com>
Signed-off-by: Anatolii Gerasymenko <anatolii.gerasymenko@intel.com>
Tested-by: Gurucharan <gurucharanx.g@intel.com> (A Contingent worker at Intel)
Signed-off-by: Tony Nguyen <anthony.l.nguyen@intel.com>
Diffstat (limited to 'drivers/net/ethernet/intel/ice/ice_lib.h')
| -rw-r--r-- | drivers/net/ethernet/intel/ice/ice_lib.h | 2 |
1 files changed, 2 insertions, 0 deletions
diff --git a/drivers/net/ethernet/intel/ice/ice_lib.h b/drivers/net/ethernet/intel/ice/ice_lib.h index 8712b1d2ceec..ec4bf0c89857 100644 --- a/drivers/net/ethernet/intel/ice/ice_lib.h +++ b/drivers/net/ethernet/intel/ice/ice_lib.h @@ -89,6 +89,8 @@ void ice_vsi_free_tx_rings(struct ice_vsi *vsi); void ice_vsi_manage_rss_lut(struct ice_vsi *vsi, bool ena); +void ice_vsi_cfg_crc_strip(struct ice_vsi *vsi, bool disable); + void ice_update_tx_ring_stats(struct ice_tx_ring *ring, u64 pkts, u64 bytes); void ice_update_rx_ring_stats(struct ice_rx_ring *ring, u64 pkts, u64 bytes); |