sfc: add mport lookup based on driver's mport data

Obtaining mport id is based on asking the firmware about it. This is
still needed for mport initialization itself, but once the mport data is
now kept by the driver, further mport id request can be satisfied
internally without firmware interaction.

Previous function is just modified in name making clear the firmware
interaction. The new function uses the old name and looks for the data
in the mport data structure.
Signed-off-by: Alejandro Lucero <alejandro.lucero-palau@amd.com>
Acked-by: Martin Habets <habetsm.xilinx@gmail.com>
Signed-off-by: Paolo Abeni <pabeni@redhat.com>

drivers/net/ethernet/sfc/ef100_nic.c

@@ -736,7 +736,7 @@ static int efx_ef100_get_base_mport(struct efx_nic *efx)
 	/* Construct mport selector for "physical network port" */
 	efx_mae_mport_wire(efx, &selector);
 	/* Look up actual mport ID */
-	rc = efx_mae_lookup_mport(efx, selector, &id);
+	rc = efx_mae_fw_lookup_mport(efx, selector, &id);
 	if (rc)
 		return rc;
 	/* The ID should always fit in 16 bits, because that's how wide the
@@ -751,7 +751,7 @@ static int efx_ef100_get_base_mport(struct efx_nic *efx)
 	/* Construct mport selector for "calling PF" */
 	efx_mae_mport_uplink(efx, &selector);
 	/* Look up actual mport ID */
-	rc = efx_mae_lookup_mport(efx, selector, &id);
+	rc = efx_mae_fw_lookup_mport(efx, selector, &id);
 	if (rc)
 		return rc;
 	if (id >> 16)

drivers/net/ethernet/sfc/ef100_rep.c

@@ -243,14 +243,11 @@ static struct efx_rep *efx_ef100_rep_create_netdev(struct efx_nic *efx,
 static int efx_ef100_configure_rep(struct efx_rep *efv)
 {
 	struct efx_nic *efx = efv->parent;
-	u32 selector;
 	int rc;
 
 	efv->rx_pring_size = EFX_REP_DEFAULT_PSEUDO_RING_SIZE;
-	/* Construct mport selector for corresponding VF */
-	efx_mae_mport_vf(efx, efv->idx, &selector);
 	/* Look up actual mport ID */
-	rc = efx_mae_lookup_mport(efx, selector, &efv->mport);
+	rc = efx_mae_lookup_mport(efx, efv->idx, &efv->mport);
 	if (rc)
 		return rc;
 	pci_dbg(efx->pci_dev, "VF %u has mport ID %#x\n", efv->idx, efv->mport);

drivers/net/ethernet/sfc/mae.c

@@ -97,7 +97,7 @@ void efx_mae_mport_mport(struct efx_nic *efx __always_unused, u32 mport_id, u32
 }
 
 /* id is really only 24 bits wide */
-int efx_mae_lookup_mport(struct efx_nic *efx, u32 selector, u32 *id)
+int efx_mae_fw_lookup_mport(struct efx_nic *efx, u32 selector, u32 *id)
 {
 	MCDI_DECLARE_BUF(outbuf, MC_CMD_MAE_MPORT_LOOKUP_OUT_LEN);
 	MCDI_DECLARE_BUF(inbuf, MC_CMD_MAE_MPORT_LOOKUP_IN_LEN);
@@ -488,6 +488,31 @@ int efx_mae_free_counter(struct efx_nic *efx, struct efx_tc_counter *cnt)
 	return 0;
 }
 
+int efx_mae_lookup_mport(struct efx_nic *efx, u32 vf_idx, u32 *id)
+{
+	struct ef100_nic_data *nic_data = efx->nic_data;
+	struct efx_mae *mae = efx->mae;
+	struct rhashtable_iter walk;
+	struct mae_mport_desc *m;
+	int rc = -ENOENT;
+
+	rhashtable_walk_enter(&mae->mports_ht, &walk);
+	rhashtable_walk_start(&walk);
+	while ((m = rhashtable_walk_next(&walk)) != NULL) {
+		if (m->mport_type == MAE_MPORT_DESC_MPORT_TYPE_VNIC &&
+		    m->interface_idx == nic_data->local_mae_intf &&
+		    m->pf_idx == 0 &&
+		    m->vf_idx == vf_idx) {
+			*id = m->mport_id;
+			rc = 0;
+			break;
+		}
+	}
+	rhashtable_walk_stop(&walk);
+	rhashtable_walk_exit(&walk);
+	return rc;
+}
+
 static bool efx_mae_asl_id(u32 id)
 {
 	return !!(id & BIT(31));

drivers/net/ethernet/sfc/mae.h

@@ -96,4 +96,6 @@ int efx_mae_delete_rule(struct efx_nic *efx, u32 id);
 int efx_init_mae(struct efx_nic *efx);
 void efx_fini_mae(struct efx_nic *efx);
 void efx_mae_remove_mport(void *desc, void *arg);
+int efx_mae_fw_lookup_mport(struct efx_nic *efx, u32 selector, u32 *id);
+int efx_mae_lookup_mport(struct efx_nic *efx, u32 vf, u32 *id);
 #endif /* EF100_MAE_H */