[iwl-next,v1,1/3] ice: support max_io_eqs for subfunction

Commit Message

Michal Swiatkowski Oct. 31, 2024, 6 a.m. UTC

Implement get and set for the maximum IO event queues for SF.
It is used to derive the maximum number of Rx/Tx queues on subfunction
device.

If the value isn't set when activating set it to the low default value.

Reviewed-by: Sridhar Samudrala <[e-mail]>
Signed-off-by: Michal Swiatkowski <[e-mail]>
---
 drivers/net/ethernet/intel/ice/devlink/port.c | 37 +++++++++++++++++++
 drivers/net/ethernet/intel/ice/ice.h          |  2 +
 2 files changed, 39 insertions(+)

Patch

diff --git a/drivers/net/ethernet/intel/ice/devlink/port.c b/drivers/net/ethernet/intel/ice/devlink/port.c
index 767419a67fef..a723895e4dff 100644
--- a/drivers/net/ethernet/intel/ice/devlink/port.c
+++ b/drivers/net/ethernet/intel/ice/devlink/port.c
@@ -530,6 +530,33 @@  void ice_devlink_destroy_sf_dev_port(struct ice_sf_dev *sf_dev)
 	devl_port_unregister(&sf_dev->priv->devlink_port);
 }
 
+static int
+ice_devlink_port_fn_max_io_eqs_set(struct devlink_port *port, u32 max_io_eqs,
+				   struct netlink_ext_ack *extack)
+{
+	struct ice_dynamic_port *dyn_port = ice_devlink_port_to_dyn(port);
+
+	if (max_io_eqs > num_online_cpus()) {
+		NL_SET_ERR_MSG_MOD(extack, "Supplied value out of range");
+		return -EINVAL;
+	}
+
+	dyn_port->vsi->max_io_eqs = max_io_eqs;
+
+	return 0;
+}
+
+static int
+ice_devlink_port_fn_max_io_eqs_get(struct devlink_port *port, u32 *max_io_eqs,
+				   struct netlink_ext_ack *extack)
+{
+	struct ice_dynamic_port *dyn_port = ice_devlink_port_to_dyn(port);
+
+	*max_io_eqs = dyn_port->vsi->max_io_eqs;
+
+	return 0;
+}
+
 /**
  * ice_activate_dynamic_port - Activate a dynamic port
  * @dyn_port: dynamic port instance to activate
@@ -548,6 +575,14 @@  ice_activate_dynamic_port(struct ice_dynamic_port *dyn_port,
 	if (dyn_port->active)
 		return 0;
 
+	if (!dyn_port->vsi->max_io_eqs) {
+		err = ice_devlink_port_fn_max_io_eqs_set(&dyn_port->devlink_port,
+							 ICE_SF_DEFAULT_EQS,
+							 extack);
+		if (err)
+			return err;
+	}
+
 	err = ice_sf_eth_activate(dyn_port, extack);
 	if (err)
 		return err;
@@ -807,6 +842,8 @@  static const struct devlink_port_ops ice_devlink_port_sf_ops = {
 	.port_fn_hw_addr_set = ice_devlink_port_fn_hw_addr_set,
 	.port_fn_state_get = ice_devlink_port_fn_state_get,
 	.port_fn_state_set = ice_devlink_port_fn_state_set,
+	.port_fn_max_io_eqs_set = ice_devlink_port_fn_max_io_eqs_set,
+	.port_fn_max_io_eqs_get = ice_devlink_port_fn_max_io_eqs_get,
 };
 
 /**
diff --git a/drivers/net/ethernet/intel/ice/ice.h b/drivers/net/ethernet/intel/ice/ice.h
index 70d5294a558c..ca0739625d3b 100644
--- a/drivers/net/ethernet/intel/ice/ice.h
+++ b/drivers/net/ethernet/intel/ice/ice.h
@@ -109,6 +109,7 @@ 
 #define ICE_Q_WAIT_MAX_RETRY	(5 * ICE_Q_WAIT_RETRY_LIMIT)
 #define ICE_MAX_LG_RSS_QS	256
 #define ICE_INVAL_Q_INDEX	0xffff
+#define ICE_SF_DEFAULT_EQS	8
 
 #define ICE_MAX_RXQS_PER_TC		256	/* Used when setting VSI context per TC Rx queues */
 
@@ -443,6 +444,7 @@  struct ice_vsi {
 	u8 old_numtc;
 	u16 old_ena_tc;
 
+	u32 max_io_eqs;
 	/* setup back reference, to which aggregator node this VSI
 	 * corresponds to
 	 */