ice: Add code to get DCB related statistics

This patch adds a new function ice_update_dcb_stats to get DCB stats
from the hardware and ethtool support for displaying these stats.
Signed-off-by: Anirudh Venkataramanan <anirudh.venkataramanan@intel.com>
Tested-by: Andrew Bowers <andrewx.bowers@intel.com>
Signed-off-by: Jeff Kirsher <jeffrey.t.kirsher@intel.com>

drivers/net/ethernet/intel/ice/ice_dcb_lib.c

@@ -359,6 +359,44 @@ int ice_init_pf_dcb(struct ice_pf *pf)
 	return err;
 }
 
+/**
+ * ice_update_dcb_stats - Update DCB stats counters
+ * @pf: PF whose stats needs to be updated
+ */
+void ice_update_dcb_stats(struct ice_pf *pf)
+{
+	struct ice_hw_port_stats *prev_ps, *cur_ps;
+	struct ice_hw *hw = &pf->hw;
+	u8 pf_id = hw->pf_id;
+	int i;
+
+	prev_ps = &pf->stats_prev;
+	cur_ps = &pf->stats;
+
+	for (i = 0; i < 8; i++) {
+		ice_stat_update32(hw, GLPRT_PXOFFRXC(pf_id, i),
+				  pf->stat_prev_loaded,
+				  &prev_ps->priority_xoff_rx[i],
+				  &cur_ps->priority_xoff_rx[i]);
+		ice_stat_update32(hw, GLPRT_PXONRXC(pf_id, i),
+				  pf->stat_prev_loaded,
+				  &prev_ps->priority_xon_rx[i],
+				  &cur_ps->priority_xon_rx[i]);
+		ice_stat_update32(hw, GLPRT_PXONTXC(pf_id, i),
+				  pf->stat_prev_loaded,
+				  &prev_ps->priority_xon_tx[i],
+				  &cur_ps->priority_xon_tx[i]);
+		ice_stat_update32(hw, GLPRT_PXOFFTXC(pf_id, i),
+				  pf->stat_prev_loaded,
+				  &prev_ps->priority_xoff_tx[i],
+				  &cur_ps->priority_xoff_tx[i]);
+		ice_stat_update32(hw, GLPRT_RXON2OFFCNT(pf_id, i),
+				  pf->stat_prev_loaded,
+				  &prev_ps->priority_xon_2_xoff[i],
+				  &cur_ps->priority_xon_2_xoff[i]);
+	}
+}
+
 /**
  * ice_tx_prepare_vlan_flags_dcb - prepare VLAN tagging for DCB
  * @tx_ring: ring to send buffer on

drivers/net/ethernet/intel/ice/ice_dcb_lib.h

@@ -12,6 +12,7 @@ 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_cfg_dcb_rings(struct ice_vsi *vsi);
 int ice_init_pf_dcb(struct ice_pf *pf);
+void ice_update_dcb_stats(struct ice_pf *pf);
 int
 ice_tx_prepare_vlan_flags_dcb(struct ice_ring *tx_ring,
 			      struct ice_tx_buf *first);
@@ -47,6 +48,7 @@ ice_tx_prepare_vlan_flags_dcb(struct ice_ring __always_unused *tx_ring,
 	return 0;
 }
 
+#define ice_update_dcb_stats(pf) do {} while (0)
 #define ice_vsi_cfg_dcb_rings(vsi) do {} while (0)
 #define ice_dcb_process_lldp_set_mib_change(pf, event) do {} while (0)
 #define ice_set_cgd_num(tlan_ctx, ring) do {} while (0)

drivers/net/ethernet/intel/ice/ice_ethtool.c

@@ -33,8 +33,14 @@ static int ice_q_stats_len(struct net_device *netdev)
 #define ICE_PF_STATS_LEN	ARRAY_SIZE(ice_gstrings_pf_stats)
 #define ICE_VSI_STATS_LEN	ARRAY_SIZE(ice_gstrings_vsi_stats)
 
-#define ICE_ALL_STATS_LEN(n)	(ICE_PF_STATS_LEN + ICE_VSI_STATS_LEN + \
-				 ice_q_stats_len(n))
+#define ICE_PFC_STATS_LEN ( \
+		(FIELD_SIZEOF(struct ice_pf, stats.priority_xoff_rx) + \
+		 FIELD_SIZEOF(struct ice_pf, stats.priority_xon_rx) + \
+		 FIELD_SIZEOF(struct ice_pf, stats.priority_xoff_tx) + \
+		 FIELD_SIZEOF(struct ice_pf, stats.priority_xon_tx)) \
+		 / sizeof(u64))
+#define ICE_ALL_STATS_LEN(n)	(ICE_PF_STATS_LEN + ICE_PFC_STATS_LEN + \
+				 ICE_VSI_STATS_LEN + ice_q_stats_len(n))
 
 static const struct ice_stats ice_gstrings_vsi_stats[] = {
 	ICE_VSI_STAT("tx_unicast", eth_stats.tx_unicast),
@@ -309,6 +315,22 @@ static void ice_get_strings(struct net_device *netdev, u32 stringset, u8 *data)
 			p += ETH_GSTRING_LEN;
 		}
 
+		for (i = 0; i < ICE_MAX_USER_PRIORITY; i++) {
+			snprintf(p, ETH_GSTRING_LEN,
+				 "port.tx-priority-%u-xon", i);
+			p += ETH_GSTRING_LEN;
+			snprintf(p, ETH_GSTRING_LEN,
+				 "port.tx-priority-%u-xoff", i);
+			p += ETH_GSTRING_LEN;
+		}
+		for (i = 0; i < ICE_MAX_USER_PRIORITY; i++) {
+			snprintf(p, ETH_GSTRING_LEN,
+				 "port.rx-priority-%u-xon", i);
+			p += ETH_GSTRING_LEN;
+			snprintf(p, ETH_GSTRING_LEN,
+				 "port.rx-priority-%u-xoff", i);
+			p += ETH_GSTRING_LEN;
+		}
 		break;
 	case ETH_SS_PRIV_FLAGS:
 		for (i = 0; i < ICE_PRIV_FLAG_ARRAY_SIZE; i++) {
@@ -486,6 +508,16 @@ ice_get_ethtool_stats(struct net_device *netdev,
 		data[i++] = (ice_gstrings_pf_stats[j].sizeof_stat ==
 			     sizeof(u64)) ? *(u64 *)p : *(u32 *)p;
 	}
+
+	for (j = 0; j < ICE_MAX_USER_PRIORITY; j++) {
+		data[i++] = pf->stats.priority_xon_tx[j];
+		data[i++] = pf->stats.priority_xoff_tx[j];
+	}
+
+	for (j = 0; j < ICE_MAX_USER_PRIORITY; j++) {
+		data[i++] = pf->stats.priority_xon_rx[j];
+		data[i++] = pf->stats.priority_xoff_rx[j];
+	}
 }
 
 /**

drivers/net/ethernet/intel/ice/ice_hw_autogen.h

@@ -321,11 +321,16 @@
 #define GLPRT_PTC64L(_i)			(0x00380B80 + ((_i) * 8))
 #define GLPRT_PTC9522H(_i)			(0x00380D04 + ((_i) * 8))
 #define GLPRT_PTC9522L(_i)			(0x00380D00 + ((_i) * 8))
+#define GLPRT_PXOFFRXC(_i, _j)			(0x00380500 + ((_i) * 8 + (_j) * 64))
+#define GLPRT_PXOFFTXC(_i, _j)			(0x00380F40 + ((_i) * 8 + (_j) * 64))
+#define GLPRT_PXONRXC(_i, _j)			(0x00380300 + ((_i) * 8 + (_j) * 64))
+#define GLPRT_PXONTXC(_i, _j)			(0x00380D40 + ((_i) * 8 + (_j) * 64))
 #define GLPRT_RFC(_i)				(0x00380AC0 + ((_i) * 8))
 #define GLPRT_RJC(_i)				(0x00380B00 + ((_i) * 8))
 #define GLPRT_RLEC(_i)				(0x00380140 + ((_i) * 8))
 #define GLPRT_ROC(_i)				(0x00380240 + ((_i) * 8))
 #define GLPRT_RUC(_i)				(0x00380200 + ((_i) * 8))
+#define GLPRT_RXON2OFFCNT(_i, _j)		(0x00380700 + ((_i) * 8 + (_j) * 64))
 #define GLPRT_TDOLD(_i)				(0x00381280 + ((_i) * 8))
 #define GLPRT_UPRCH(_i)				(0x00381304 + ((_i) * 8))
 #define GLPRT_UPRCL(_i)				(0x00381300 + ((_i) * 8))

drivers/net/ethernet/intel/ice/ice_main.c

@@ -3251,6 +3251,8 @@ static void ice_update_pf_stats(struct ice_pf *pf)
 	ice_stat_update32(hw, GLPRT_LXOFFTXC(pf_id), pf->stat_prev_loaded,
 			  &prev_ps->link_xoff_tx, &cur_ps->link_xoff_tx);
 
+	ice_update_dcb_stats(pf);
+
 	ice_stat_update32(hw, GLPRT_CRCERRS(pf_id), pf->stat_prev_loaded,
 			  &prev_ps->crc_errors, &cur_ps->crc_errors);
 

drivers/net/ethernet/intel/ice/ice_type.h

@@ -477,6 +477,11 @@ struct ice_hw_port_stats {
 	u64 link_xoff_rx;		/* lxoffrxc */
 	u64 link_xon_tx;		/* lxontxc */
 	u64 link_xoff_tx;		/* lxofftxc */
+	u64 priority_xon_rx[8];		/* pxonrxc[8] */
+	u64 priority_xoff_rx[8];	/* pxoffrxc[8] */
+	u64 priority_xon_tx[8];		/* pxontxc[8] */
+	u64 priority_xoff_tx[8];	/* pxofftxc[8] */
+	u64 priority_xon_2_xoff[8];	/* pxon2offc[8] */
 	u64 rx_size_64;			/* prc64 */
 	u64 rx_size_127;		/* prc127 */
 	u64 rx_size_255;		/* prc255 */