net/sfc: invalidate dangling MAE flow action FW resource IDs

[ upstream commit cf1e1a8e869b49ac9e2e097bbd272e94cc4f2c74 ]

When reinserting a flow (on port restart, for instance)
FW resource IDs found in the action set specification
need to be invalidated so that the new (reallocated)
FW resource IDs can be accepted by libefx again.

Fixes: 1bbd1ec ("net/sfc: support action VXLAN encap in MAE backend")

Signed-off-by: Ivan Malov <ivan.malov@arknetworks.am>
Reviewed-by: Andy Moreton <amoreton@xilinx.com>
Tested-by: Denis Pryazhennikov <denis.pryazhennikov@arknetworks.am>
Acked-by: Andrew Rybchenko <andrew.rybchenko@oktetlabs.ru>

.mailmap

@@ -297,6 +297,7 @@ Deepak Khandelwal <deepak.khandelwal@intel.com>
 Deepak Kumar Jain <deepak.k.jain@intel.com>
 Deirdre O'Connor <deirdre.o.connor@intel.com>
 Dekel Peled <dekelp@nvidia.com> <dekelp@mellanox.com>
+Denis Pryazhennikov <denis.pryazhennikov@arknetworks.am>
 Dennis Marinus <dmarinus@amazon.com>
 Derek Chickles <derek.chickles@caviumnetworks.com>
 Des O Dea <des.j.o.dea@intel.com>

drivers/common/sfc_efx/base/efx.h

@@ -4701,6 +4701,20 @@ efx_mae_action_set_fill_in_counter_id(
 	__in				efx_mae_actions_t *spec,
 	__in				const efx_counter_t *counter_idp);
 
+/*
+ * Clears dangling FW object IDs (counter ID, for instance) in
+ * the action set specification. Useful for adapter restarts,
+ * when all MAE objects need to be reallocated by the driver.
+ *
+ * This method only clears the IDs in the specification.
+ * The driver is still responsible for keeping the IDs
+ * separately and freeing them when stopping the port.
+ */
+LIBEFX_API
+extern					void
+efx_mae_action_set_clear_fw_rsrc_ids(
+	__in				efx_mae_actions_t *spec);
+
 /* Action set ID */
 typedef struct efx_mae_aset_id_s {
 	uint32_t id;

drivers/common/sfc_efx/base/efx_impl.h

@@ -1799,6 +1799,10 @@ typedef struct efx_mae_action_vlan_push_s {
 	uint16_t			emavp_tci_be;
 } efx_mae_action_vlan_push_t;
 
+/*
+ * Helper efx_mae_action_set_clear_fw_rsrc_ids() is responsible
+ * to initialise every field in this structure to INVALID value.
+ */
 typedef struct efx_mae_actions_rsrc_s {
 	efx_mae_mac_id_t		emar_dst_mac_id;
 	efx_mae_mac_id_t		emar_src_mac_id;

drivers/common/sfc_efx/base/efx_mae.c

@@ -1394,10 +1394,7 @@ efx_mae_action_set_spec_init(
 		goto fail1;
 	}
 
-	spec->ema_rsrc.emar_dst_mac_id.id = EFX_MAE_RSRC_ID_INVALID;
-	spec->ema_rsrc.emar_src_mac_id.id = EFX_MAE_RSRC_ID_INVALID;
-	spec->ema_rsrc.emar_eh_id.id = EFX_MAE_RSRC_ID_INVALID;
-	spec->ema_rsrc.emar_counter_id.id = EFX_MAE_RSRC_ID_INVALID;
+	efx_mae_action_set_clear_fw_rsrc_ids(spec);
 
 	/*
 	 * Helpers which populate v2 actions must reject them when v2 is not
@@ -3027,6 +3024,16 @@ efx_mae_action_set_fill_in_counter_id(
 	return (rc);
 }
 
+					void
+efx_mae_action_set_clear_fw_rsrc_ids(
+	__in				efx_mae_actions_t *spec)
+{
+	spec->ema_rsrc.emar_dst_mac_id.id = EFX_MAE_RSRC_ID_INVALID;
+	spec->ema_rsrc.emar_src_mac_id.id = EFX_MAE_RSRC_ID_INVALID;
+	spec->ema_rsrc.emar_eh_id.id = EFX_MAE_RSRC_ID_INVALID;
+	spec->ema_rsrc.emar_counter_id.id = EFX_MAE_RSRC_ID_INVALID;
+}
+
 	__checkReturn			efx_rc_t
 efx_mae_counters_alloc(
 	__in				efx_nic_t *enp,

drivers/common/sfc_efx/version.map

@@ -89,6 +89,7 @@ INTERNAL {
 	efx_mae_action_rule_insert;
 	efx_mae_action_rule_remove;
 	efx_mae_action_set_alloc;
+	efx_mae_action_set_clear_fw_rsrc_ids;
 	efx_mae_action_set_fill_in_counter_id;
 	efx_mae_action_set_fill_in_dst_mac_id;
 	efx_mae_action_set_fill_in_eh_id;

drivers/net/sfc/sfc_mae.c

@@ -1180,6 +1180,8 @@ sfc_mae_action_set_disable(struct sfc_adapter *sa,
 	}
 
 	if (fw_rsrc->refcnt == 1) {
+		efx_mae_action_set_clear_fw_rsrc_ids(action_set->spec);
+
 		rc = efx_mae_action_set_free(sa->nic, &fw_rsrc->aset_id);
 		if (rc == 0) {
 			sfc_dbg(sa, "disabled action_set=%p with AS_ID=0x%08x",