ice: Implement driver functionality to dump serdes equalizer values

To debug link issues in the field, serdes Tx/Rx equalizer values
help to determine the health of serdes lane.

Extend 'ethtool -d' option to dump serdes Tx/Rx equalizer.
The following list of equalizer param is supported
    a. rx_equalization_pre2
    b. rx_equalization_pre1
    c. rx_equalization_post1
    d. rx_equalization_bflf
    e. rx_equalization_bfhf
    f. rx_equalization_drate
    g. tx_equalization_pre1
    h. tx_equalization_pre3
    i. tx_equalization_atten
    j. tx_equalization_post1
    k. tx_equalization_pre2

Reviewed-by: Simon Horman <[email protected]>
Reviewed-by: Jesse Brandeburg <[email protected]>
Signed-off-by: Anil Samal <[email protected]>
Tested-by: Pucha Himasekhar Reddy <[email protected]> (A Contingent worker at Intel)
Signed-off-by: Tony Nguyen <[email protected]>
Link: https://patch.msgid.link/[email protected]
Signed-off-by: Jakub Kicinski <[email protected]>

1 files changed, 2 insertions, 0 deletions

diff --git a/drivers/net/ethernet/intel/ice/ice_common.h b/drivers/net/ethernet/intel/ice/ice_common.h
index bd814e751cbf..66f29bac783a 100644
--- a/drivers/net/ethernet/intel/ice/ice_common.h
+++ b/drivers/net/ethernet/intel/ice/ice_common.h
@@ -142,6 +142,8 @@ int
 ice_get_link_default_override(struct ice_link_default_override_tlv *ldo,
 			      struct ice_port_info *pi);
 bool ice_is_phy_caps_an_enabled(struct ice_aqc_get_phy_caps_data *caps);
+int ice_aq_get_phy_equalization(struct ice_hw *hw, u16 data_in, u16 op_code,
+				u8 serdes_num, int *output);
 int
 ice_aq_get_fec_stats(struct ice_hw *hw, u16 pcs_quad, u16 pcs_port,
 		     enum ice_fec_stats_types fec_type, u32 *output);