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>

1 files changed, 9 insertions, 0 deletions

diff --git a/drivers/net/ethernet/intel/ice/ice_vf_mbx.h b/drivers/net/ethernet/intel/ice/ice_vf_mbx.h
index 44bc030d17e0..684de89e5c5e 100644
--- a/drivers/net/ethernet/intel/ice/ice_vf_mbx.h
+++ b/drivers/net/ethernet/intel/ice/ice_vf_mbx.h
@@ -19,6 +19,9 @@ ice_aq_send_msg_to_vf(struct ice_hw *hw, u16 vfid, u32 v_opcode, u32 v_retval,
 		      u8 *msg, u16 msglen, struct ice_sq_cd *cd);
 
 u32 ice_conv_link_speed_to_virtchnl(bool adv_link_support, u16 link_speed);
+void ice_mbx_vf_dec_trig_e830(const struct ice_hw *hw,
+			      const struct ice_rq_event_info *event);
+void ice_mbx_vf_clear_cnt_e830(const struct ice_hw *hw, u16 vf_id);
 int
 ice_mbx_vf_state_handler(struct ice_hw *hw, struct ice_mbx_data *mbx_data,
 			 struct ice_mbx_vf_info *vf_info, bool *report_malvf);
@@ -47,5 +50,11 @@ static inline void ice_mbx_init_snapshot(struct ice_hw *hw)
 {
 }
 
+static inline void
+ice_mbx_vf_dec_trig_e830(const struct ice_hw *hw,
+			 const struct ice_rq_event_info *event)
+{
+}
+
 #endif /* CONFIG_PCI_IOV */
 #endif /* _ICE_VF_MBX_H_ */