ice: Add DSCP support

Implement code to handle submission of APP TLV's
containing DSCP to TC mapping.

The first such mapping received on an interface
will cause that PF to switch to L3 DSCP QoS mode,
apply the default config for that mode, and apply
the received mapping.

Only one such mapping will be allowed per DSCP value,
and when the last DSCP mapping is deleted, the PF
will switch back into L2 VLAN QoS mode, applying the
appropriate default QoS settings.

L3 DSCP QoS mode will only be allowed in SW DCBx
mode, in other words, when the FW LLDP engine is
disabled.  Commands that break this mutual exclusivity
will be blocked.

Co-developed-by: Anirudh Venkataramanan <anirudh.venkataramanan@intel.com>
Signed-off-by: Anirudh Venkataramanan <anirudh.venkataramanan@intel.com>
Signed-off-by: Dave Ertman <david.m.ertman@intel.com>
Tested-by: Gurucharan G <gurucharanx.g@intel.com>
Signed-off-by: Tony Nguyen <anthony.l.nguyen@intel.com>

1 files changed, 12 insertions, 0 deletions

diff --git a/drivers/net/ethernet/intel/ice/ice_dcb_lib.h b/drivers/net/ethernet/intel/ice/ice_dcb_lib.h
index 261b6e2ed7bc..3dcde1750a5e 100644
--- a/drivers/net/ethernet/intel/ice/ice_dcb_lib.h
+++ b/drivers/net/ethernet/intel/ice/ice_dcb_lib.h
@@ -15,6 +15,7 @@
 #define ICE_DCB_HW_CHG		2 /* DCB configuration changed, no reset */
 
 void ice_dcb_rebuild(struct ice_pf *pf);
+int ice_dcb_sw_dflt_cfg(struct ice_pf *pf, bool ets_willing, bool locked);
 u8 ice_dcb_get_ena_tc(struct ice_dcbx_cfg *dcbcfg);
 u8 ice_dcb_get_num_tc(struct ice_dcbx_cfg *dcbcfg);
 void ice_vsi_set_dcb_tc_cfg(struct ice_vsi *vsi);
@@ -59,6 +60,12 @@ static inline bool ice_is_dcb_active(struct ice_pf *pf)
 	return (test_bit(ICE_FLAG_FW_LLDP_AGENT, pf->flags) ||
 		test_bit(ICE_FLAG_DCB_ENA, pf->flags));
 }
+
+static inline u8 ice_get_pfc_mode(struct ice_pf *pf)
+{
+	return pf->hw.port_info->qos_cfg.local_dcbx_cfg.pfc_mode;
+}
+
 #else
 static inline void ice_dcb_rebuild(struct ice_pf *pf) { }
 
@@ -113,6 +120,11 @@ ice_is_pfc_causing_hung_q(struct ice_pf __always_unused *pf,
 	return false;
 }
 
+static inline u8 ice_get_pfc_mode(struct ice_pf *pf)
+{
+	return 0;
+}
+
 static inline void ice_pf_dcb_recfg(struct ice_pf *pf) { }
 static inline void ice_vsi_cfg_dcb_rings(struct ice_vsi *vsi) { }
 static inline void ice_update_dcb_stats(struct ice_pf *pf) { }