ice: introduce new type of VSI for switchdev

New type of VSI has to be defined for switchdev control plane
VSI. Number of allocated Tx and Rx queue has to be equal to
amount of VFs, because each port representor should have one
Tx and Rx queue.

Also to not increase number of used irqs too much, control plane
VSI uses only one q_vector and handle all queues in one irq.
To allow handling all queues in one irq , new function to clean
msix for eswitch was introduced. This function will schedule napi
for each representor instead of scheduling it only for one like in
normal clean irq function.

Only one additional msix has to be requested. Always try to request
it in ice_ena_msix_range function.

Signed-off-by: Grzegorz Nitka <grzegorz.nitka@intel.com>
Tested-by: Sandeep Penigalapati <sandeep.penigalapati@intel.com>
Signed-off-by: Tony Nguyen <anthony.l.nguyen@intel.com>

1 files changed, 35 insertions, 1 deletions

diff --git a/drivers/net/ethernet/intel/ice/ice_base.c b/drivers/net/ethernet/intel/ice/ice_base.c
index c36057efc7ae..d7a5ac9346bc 100644
--- a/drivers/net/ethernet/intel/ice/ice_base.c
+++ b/drivers/net/ethernet/intel/ice/ice_base.c
@@ -218,6 +218,30 @@ static u16 ice_calc_q_handle(struct ice_vsi *vsi, struct ice_ring *ring, u8 tc)
 }
 
 /**
+ * ice_eswitch_calc_q_handle
+ * @ring: pointer to ring which unique index is needed
+ *
+ * To correctly work with many netdevs ring->q_index of Tx rings on switchdev
+ * VSI can repeat. Hardware ring setup requires unique q_index. Calculate it
+ * here by finding index in vsi->tx_rings of this ring.
+ *
+ * Return ICE_INVAL_Q_INDEX when index wasn't found. Should never happen,
+ * because VSI is get from ring->vsi, so it has to be present in this VSI.
+ */
+static u16 ice_eswitch_calc_q_handle(struct ice_ring *ring)
+{
+	struct ice_vsi *vsi = ring->vsi;
+	int i;
+
+	ice_for_each_txq(vsi, i) {
+		if (vsi->tx_rings[i] == ring)
+			return i;
+	}
+
+	return ICE_INVAL_Q_INDEX;
+}
+
+/**
  * ice_cfg_xps_tx_ring - Configure XPS for a Tx ring
  * @ring: The Tx ring to configure
  *
@@ -280,6 +304,9 @@ ice_setup_tx_ctx(struct ice_ring *ring, struct ice_tlan_ctx *tlan_ctx, u16 pf_q)
 		tlan_ctx->vmvf_num = hw->func_caps.vf_base_id + vsi->vf_id;
 		tlan_ctx->vmvf_type = ICE_TLAN_CTX_VMVF_TYPE_VF;
 		break;
+	case ICE_VSI_SWITCHDEV_CTRL:
+		tlan_ctx->vmvf_type = ICE_TLAN_CTX_VMVF_TYPE_VMQ;
+		break;
 	default:
 		return;
 	}
@@ -746,7 +773,14 @@ ice_vsi_cfg_txq(struct ice_vsi *vsi, struct ice_ring *ring,
 	/* Add unique software queue handle of the Tx queue per
 	 * TC into the VSI Tx ring
 	 */
-	ring->q_handle = ice_calc_q_handle(vsi, ring, tc);
+	if (vsi->type == ICE_VSI_SWITCHDEV_CTRL) {
+		ring->q_handle = ice_eswitch_calc_q_handle(ring);
+
+		if (ring->q_handle == ICE_INVAL_Q_INDEX)
+			return -ENODEV;
+	} else {
+		ring->q_handle = ice_calc_q_handle(vsi, ring, tc);
+	}
 
 	status = ice_ena_vsi_txq(vsi->port_info, vsi->idx, tc, ring->q_handle,
 				 1, qg_buf, buf_len, NULL);