common/sfc_efx/base: indicate MAE support for encapsulation

MAE provides support for encapsulation. One needs to insert
a so-called outer rule, which can match outer packet fields,
to require that matching packets be parsed as tunnel frames
of a given type (VXLAN, Geneve, NVGRE). Then it is possible
to chain this rule with an action rule in order to match on
inner fields and carry out some actions on matching packets.

Report to clients what encapsulation types are supported by
MAE. Indicate the number of priority levels for outer rules.

Signed-off-by: Ivan Malov <ivan.malov@oktetlabs.ru>
Signed-off-by: Andrew Rybchenko <arybchenko@solarflare.com>
Reviewed-by: Andy Moreton <amoreton@xilinx.com>

diff --git a/drivers/common/sfc_efx/base/efx.h b/drivers/common/sfc_efx/base/efx.h
index b84a433..dea1fe3 100644 (file)
--- a/drivers/common/sfc_efx/base/efx.h
+++ b/drivers/common/sfc_efx/base/efx.h
@@ -4068,6 +4068,8 @@ efx_mae_fini(
 
 typedef struct efx_mae_limits_s {
        uint32_t                        eml_max_n_action_prios;
+       uint32_t                        eml_max_n_outer_prios;
+       uint32_t                        eml_encap_types_supported;
 } efx_mae_limits_t;
 
 LIBEFX_API

diff --git a/drivers/common/sfc_efx/base/efx_impl.h b/drivers/common/sfc_efx/base/efx_impl.h
index 5f662b6..3d1a4fd 100644 (file)
--- a/drivers/common/sfc_efx/base/efx_impl.h
+++ b/drivers/common/sfc_efx/base/efx_impl.h
@@ -798,6 +798,8 @@ typedef struct efx_mae_s {
        /** Action rule match field capabilities. */
        efx_mae_field_cap_t             *em_action_rule_field_caps;
        size_t                          em_action_rule_field_caps_size;
+       uint32_t                        em_max_n_outer_prios;
+       uint32_t                        em_encap_types_supported;
 } efx_mae_t;
 
 #endif /* EFSYS_OPT_MAE */

diff --git a/drivers/common/sfc_efx/base/efx_mae.c b/drivers/common/sfc_efx/base/efx_mae.c
index a2b541a..58b323d 100644 (file)
--- a/drivers/common/sfc_efx/base/efx_mae.c
+++ b/drivers/common/sfc_efx/base/efx_mae.c
@@ -39,9 +39,29 @@ efx_mae_get_capabilities(
                goto fail2;
        }
 
+       maep->em_max_n_outer_prios =
+           MCDI_OUT_DWORD(req, MAE_GET_CAPS_OUT_OUTER_PRIOS);
+
        maep->em_max_n_action_prios =
            MCDI_OUT_DWORD(req, MAE_GET_CAPS_OUT_ACTION_PRIOS);
 
+       maep->em_encap_types_supported = 0;
+
+       if (MCDI_OUT_DWORD(req, MAE_GET_CAPS_OUT_ENCAP_TYPE_VXLAN) == 1) {
+               maep->em_encap_types_supported |=
+                   (1U << EFX_TUNNEL_PROTOCOL_VXLAN);
+       }
+
+       if (MCDI_OUT_DWORD(req, MAE_GET_CAPS_OUT_ENCAP_TYPE_GENEVE) == 1) {
+               maep->em_encap_types_supported |=
+                   (1U << EFX_TUNNEL_PROTOCOL_GENEVE);
+       }
+
+       if (MCDI_OUT_DWORD(req, MAE_GET_CAPS_OUT_ENCAP_TYPE_NVGRE) == 1) {
+               maep->em_encap_types_supported |=
+                   (1U << EFX_TUNNEL_PROTOCOL_NVGRE);
+       }
+
        maep->em_max_nfields =
            MCDI_OUT_DWORD(req, MAE_GET_CAPS_OUT_MATCH_FIELD_COUNT);
 
@@ -225,7 +245,9 @@ efx_mae_get_limits(
                goto fail1;
        }
 
+       emlp->eml_max_n_outer_prios = maep->em_max_n_outer_prios;
        emlp->eml_max_n_action_prios = maep->em_max_n_action_prios;
+       emlp->eml_encap_types_supported = maep->em_encap_types_supported;
 
        return (0);