diff options
| author | Paul Greenwalt <paul.greenwalt@intel.com> | 2024-08-20 17:26:16 -0400 |
|---|---|---|
| committer | Tony Nguyen <anthony.l.nguyen@intel.com> | 2024-10-08 14:37:15 -0700 |
| commit | 59f4d59b25aec39a015c0949f4ec235c7a839c44 (patch) | |
| tree | 2509bbbb752050eec414927bdde81b8c51c75e17 /drivers/net/ethernet/intel/ice/ice_virtchnl.c | |
| parent | b699c81af0683ad5b7a7e2b3ef4ae3ff8ee41153 (diff) | |
| download | linux-59f4d59b25aec39a015c0949f4ec235c7a839c44.tar.gz linux-59f4d59b25aec39a015c0949f4ec235c7a839c44.tar.bz2 linux-59f4d59b25aec39a015c0949f4ec235c7a839c44.zip | |
ice: add E830 HW VF mailbox message limit support
E830 adds hardware support to prevent the VF from overflowing the PF
mailbox with VIRTCHNL messages. E830 will use the hardware feature
(ICE_F_MBX_LIMIT) instead of the software solution ice_is_malicious_vf().
To prevent a VF from overflowing the PF, the PF sets the number of
messages per VF that can be in the PF's mailbox queue
(ICE_MBX_OVERFLOW_WATERMARK). When the PF processes a message from a VF,
the PF decrements the per VF message count using the E830_MBX_VF_DEC_TRIG
register.
Signed-off-by: Paul Greenwalt <paul.greenwalt@intel.com>
Reviewed-by: Alexander Lobakin <aleksander.lobakin@intel.com>
Tested-by: Rafal Romanowski <rafal.romanowski@intel.com>
Signed-off-by: Tony Nguyen <anthony.l.nguyen@intel.com>
Diffstat (limited to 'drivers/net/ethernet/intel/ice/ice_virtchnl.c')
| -rw-r--r-- | drivers/net/ethernet/intel/ice/ice_virtchnl.c | 8 |
1 files changed, 5 insertions, 3 deletions
diff --git a/drivers/net/ethernet/intel/ice/ice_virtchnl.c b/drivers/net/ethernet/intel/ice/ice_virtchnl.c index 59f62306b9cb..3c86d0c2fe1f 100644 --- a/drivers/net/ethernet/intel/ice/ice_virtchnl.c +++ b/drivers/net/ethernet/intel/ice/ice_virtchnl.c @@ -4009,8 +4009,10 @@ ice_is_malicious_vf(struct ice_vf *vf, struct ice_mbx_data *mbxdata) * @event: pointer to the AQ event * @mbxdata: information used to detect VF attempting mailbox overflow * - * called from the common asq/arq handler to - * process request from VF + * Called from the common asq/arq handler to process request from VF. When this + * flow is used for devices with hardware VF to PF message queue overflow + * support (ICE_F_MBX_LIMIT) mbxdata is set to NULL and ice_is_malicious_vf + * check is skipped. */ void ice_vc_process_vf_msg(struct ice_pf *pf, struct ice_rq_event_info *event, struct ice_mbx_data *mbxdata) @@ -4036,7 +4038,7 @@ void ice_vc_process_vf_msg(struct ice_pf *pf, struct ice_rq_event_info *event, mutex_lock(&vf->cfg_lock); /* Check if the VF is trying to overflow the mailbox */ - if (ice_is_malicious_vf(vf, mbxdata)) + if (mbxdata && ice_is_malicious_vf(vf, mbxdata)) goto finish; /* Check if VF is disabled. */ |