[PATCH v5 net-next 7/8] ice: add Tx reference clock index handling to AN restart command

Grzegorz Nitka
2026-04-02T23:10:57Z

Extend the Restart Auto-Negotiation (AN) AdminQ command with a new
parameter allowing software to specify the Tx reference clock index to
be used during link restart.

This patch:
- adds REFCLK field definitions to ice_aqc_restart_an
- updates ice_aq_set_link_restart_an() to take a new refclk parameter
and properly encode it into the command
- keeps legacy behavior by passing REFCLK_NOCHANGE where appropriate

This prepares the driver for configurations requiring dynamic selection
of the Tx reference clock as part of the AN flow.

Reviewed-by: Arkadiusz Kubalewski <arkadiusz.kubalewski@intel.com>
Signed-off-by: Grzegorz Nitka <grzegorz.nitka@intel.com>
---
drivers/net/ethernet/intel/ice/ice_adminq_cmd.h | 2 ++
drivers/net/ethernet/intel/ice/ice_common.c | 5 ++++-
drivers/net/ethernet/intel/ice/ice_common.h | 2 +-
drivers/net/ethernet/intel/ice/ice_lib.c | 3 ++-
4 files changed, 9 insertions(+), 3 deletions(-)

diff --git a/drivers/net/ethernet/intel/ice/ice_adminq_cmd.h b/drivers/net/ethernet/intel/ice/ice_adminq_cmd.h
index 859e9c66f3e7..a24a0613d887 100644
--- a/drivers/net/ethernet/intel/ice/ice_adminq_cmd.h
+++ b/drivers/net/ethernet/intel/ice/ice_adminq_cmd.h
@@ -1169,6 +1169,8 @@ struct ice_aqc_restart_an {
u8 cmd_flags;
#define ICE_AQC_RESTART_AN_LINK_RESTART BIT(1)
#define ICE_AQC_RESTART_AN_LINK_ENABLE BIT(2)
+#define ICE_AQC_RESTART_AN_REFCLK_M GENMASK(4, 3)
+#define ICE_AQC_RESTART_AN_REFCLK_NOCHANGE 0
u8 reserved2[13];
};

diff --git a/drivers/net/ethernet/intel/ice/ice_common.c b/drivers/net/ethernet/intel/ice/ice_common.c
index ce11fea122d0..de88aec9137c 100644
--- a/drivers/net/ethernet/intel/ice/ice_common.c
+++ b/drivers/net/ethernet/intel/ice/ice_common.c
@@ -4126,12 +4126,13 @@ int ice_get_link_status(struct ice_port_info *pi, bool *link_up)
* @pi: pointer to the port information structure
* @ena_link: if true: enable link, if false: disable link
* @cd: pointer to command details structure or NULL
+ * @refclk: the new TX reference clock, 0 if no change
*
* Sets up the link and restarts the Auto-Negotiation over the link.
*/
int
ice_aq_set_link_restart_an(struct ice_port_info *pi, bool ena_link,
- struct ice_sq_cd *cd)
+ struct ice_sq_cd *cd, u8 refclk)
{
struct ice_aqc_restart_an *cmd;
struct libie_aq_desc desc;
@@ -4147,6 +4148,8 @@ ice_aq_set_link_restart_an(struct ice_port_info *pi, bool ena_link,
else
cmd->cmd_flags &= ~ICE_AQC_RESTART_AN_LINK_ENABLE;

+ cmd->cmd_flags |= FIELD_PREP(ICE_AQC_RESTART_AN_REFCLK_M, refclk);
+
return ice_aq_send_cmd(pi->hw, &desc, NULL, 0, cd);
}

diff --git a/drivers/net/ethernet/intel/ice/ice_common.h b/drivers/net/ethernet/intel/ice/ice_common.h
index e700ac0dc347..9f5344212195 100644
--- a/drivers/net/ethernet/intel/ice/ice_common.h
+++ b/drivers/net/ethernet/intel/ice/ice_common.h
@@ -215,7 +215,7 @@ ice_cfg_phy_fec(struct ice_port_info *pi, struct ice_aqc_set_phy_cfg_data *cfg,
enum ice_fec_mode fec);
int
ice_aq_set_link_restart_an(struct ice_port_info *pi, bool ena_link,
- struct ice_sq_cd *cd);
+ struct ice_sq_cd *cd, u8 refclk);
int
ice_aq_set_mac_cfg(struct ice_hw *hw, u16 max_frame_size, struct ice_sq_cd *cd);
int
diff --git a/drivers/net/ethernet/intel/ice/ice_lib.c b/drivers/net/ethernet/intel/ice/ice_lib.c
index 689c6025ea82..c2c7f186bcc7 100644
--- a/drivers/net/ethernet/intel/ice/ice_lib.c
+++ b/drivers/net/ethernet/intel/ice/ice_lib.c
@@ -3769,7 +3769,8 @@ int ice_set_link(struct ice_vsi *vsi, bool ena)
if (vsi->type != ICE_VSI_PF)
return -EINVAL;

- status = ice_aq_set_link_restart_an(pi, ena, NULL);
+ status = ice_aq_set_link_restart_an(pi, ena, NULL,
+ ICE_AQC_RESTART_AN_REFCLK_NOCHANGE);

/* if link is owned by manageability, FW will return LIBIE_AQ_RC_EMODE.
* this is not a fatal error, so print a warning message and return
--
2.39.3