[dpdk-dev] [PATCH v4 10/12] net/ice: enable stats for DCF

[Ting Xu <ting.xu@intel.com>]

From: Qi Zhang <qi.z.zhang@intel.com>

Add support to get and reset Rx/Tx stats in DCF. Query stats
from PF.

Signed-off-by: Qi Zhang <qi.z.zhang@intel.com>
Signed-off-by: Ting Xu <ting.xu@intel.com>
---
 drivers/net/ice/ice_dcf.c        |  27 ++++++++
 drivers/net/ice/ice_dcf.h        |   4 ++
 drivers/net/ice/ice_dcf_ethdev.c | 102 +++++++++++++++++++++++++++----
 3 files changed, 120 insertions(+), 13 deletions(-)

diff --git a/drivers/net/ice/ice_dcf.c b/drivers/net/ice/ice_dcf.c
index f18c0f16a..fbeb58ee1 100644
--- a/drivers/net/ice/ice_dcf.c
+++ b/drivers/net/ice/ice_dcf.c
@@ -993,3 +993,30 @@ ice_dcf_disable_queues(struct ice_dcf_hw *hw)
 
 	return err;
 }
+
+int
+ice_dcf_query_stats(struct ice_dcf_hw *hw,
+				   struct virtchnl_eth_stats *pstats)
+{
+	struct virtchnl_queue_select q_stats;
+	struct dcf_virtchnl_cmd args;
+	int err;
+
+	memset(&q_stats, 0, sizeof(q_stats));
+	q_stats.vsi_id = hw->vsi_res->vsi_id;
+
+	args.v_op = VIRTCHNL_OP_GET_STATS;
+	args.req_msg = (uint8_t *)&q_stats;
+	args.req_msglen = sizeof(q_stats);
+	args.rsp_msglen = sizeof(*pstats);
+	args.rsp_msgbuf = (uint8_t *)pstats;
+	args.rsp_buflen = sizeof(*pstats);
+
+	err = ice_dcf_execute_virtchnl_cmd(hw, &args);
+	if (err) {
+		PMD_DRV_LOG(ERR, "fail to execute command OP_GET_STATS");
+		return err;
+	}
+
+	return 0;
+}
diff --git a/drivers/net/ice/ice_dcf.h b/drivers/net/ice/ice_dcf.h
index 68e1661c0..e82bc7748 100644
--- a/drivers/net/ice/ice_dcf.h
+++ b/drivers/net/ice/ice_dcf.h
@@ -58,6 +58,7 @@ struct ice_dcf_hw {
 	uint16_t msix_base;
 	uint16_t nb_msix;
 	uint16_t rxq_map[16];
+	struct virtchnl_eth_stats eth_stats_offset;
 };
 
 int ice_dcf_execute_virtchnl_cmd(struct ice_dcf_hw *hw,
@@ -72,4 +73,7 @@ int ice_dcf_configure_queues(struct ice_dcf_hw *hw);
 int ice_dcf_config_irq_map(struct ice_dcf_hw *hw);
 int ice_dcf_switch_queue(struct ice_dcf_hw *hw, uint16_t qid, bool rx, bool on);
 int ice_dcf_disable_queues(struct ice_dcf_hw *hw);
+int ice_dcf_query_stats(struct ice_dcf_hw *hw,
+			struct virtchnl_eth_stats *pstats);
+
 #endif /* _ICE_DCF_H_ */
diff --git a/drivers/net/ice/ice_dcf_ethdev.c b/drivers/net/ice/ice_dcf_ethdev.c
index d0219a728..38e321f4b 100644
--- a/drivers/net/ice/ice_dcf_ethdev.c
+++ b/drivers/net/ice/ice_dcf_ethdev.c
@@ -697,19 +697,6 @@ ice_dcf_dev_info_get(struct rte_eth_dev *dev,
 	return 0;
 }
 
-static int
-ice_dcf_stats_get(__rte_unused struct rte_eth_dev *dev,
-		  __rte_unused struct rte_eth_stats *igb_stats)
-{
-	return 0;
-}
-
-static int
-ice_dcf_stats_reset(__rte_unused struct rte_eth_dev *dev)
-{
-	return 0;
-}
-
 static int
 ice_dcf_dev_promiscuous_enable(__rte_unused struct rte_eth_dev *dev)
 {
@@ -762,6 +749,95 @@ ice_dcf_dev_filter_ctrl(struct rte_eth_dev *dev,
 	return ret;
 }
 
+#define ICE_DCF_32_BIT_WIDTH (CHAR_BIT * 4)
+#define ICE_DCF_48_BIT_WIDTH (CHAR_BIT * 6)
+#define ICE_DCF_48_BIT_MASK  RTE_LEN2MASK(ICE_DCF_48_BIT_WIDTH, uint64_t)
+
+static void
+ice_dcf_stat_update_48(uint64_t *offset, uint64_t *stat)
+{
+	if (*stat >= *offset)
+		*stat = *stat - *offset;
+	else
+		*stat = (uint64_t)((*stat +
+			((uint64_t)1 << ICE_DCF_48_BIT_WIDTH)) - *offset);
+
+	*stat &= ICE_DCF_48_BIT_MASK;
+}
+
+static void
+ice_dcf_stat_update_32(uint64_t *offset, uint64_t *stat)
+{
+	if (*stat >= *offset)
+		*stat = (uint64_t)(*stat - *offset);
+	else
+		*stat = (uint64_t)((*stat +
+			((uint64_t)1 << ICE_DCF_32_BIT_WIDTH)) - *offset);
+}
+
+static void
+ice_dcf_update_stats(struct virtchnl_eth_stats *oes,
+		     struct virtchnl_eth_stats *nes)
+{
+	ice_dcf_stat_update_48(&oes->rx_bytes, &nes->rx_bytes);
+	ice_dcf_stat_update_48(&oes->rx_unicast, &nes->rx_unicast);
+	ice_dcf_stat_update_48(&oes->rx_multicast, &nes->rx_multicast);
+	ice_dcf_stat_update_48(&oes->rx_broadcast, &nes->rx_broadcast);
+	ice_dcf_stat_update_32(&oes->rx_discards, &nes->rx_discards);
+	ice_dcf_stat_update_48(&oes->tx_bytes, &nes->tx_bytes);
+	ice_dcf_stat_update_48(&oes->tx_unicast, &nes->tx_unicast);
+	ice_dcf_stat_update_48(&oes->tx_multicast, &nes->tx_multicast);
+	ice_dcf_stat_update_48(&oes->tx_broadcast, &nes->tx_broadcast);
+	ice_dcf_stat_update_32(&oes->tx_errors, &nes->tx_errors);
+	ice_dcf_stat_update_32(&oes->tx_discards, &nes->tx_discards);
+}
+
+
+static int
+ice_dcf_stats_get(struct rte_eth_dev *dev, struct rte_eth_stats *stats)
+{
+	struct ice_dcf_adapter *ad = dev->data->dev_private;
+	struct ice_dcf_hw *hw = &ad->real_hw;
+	struct virtchnl_eth_stats pstats;
+	int ret;
+
+	ret = ice_dcf_query_stats(hw, &pstats);
+	if (ret == 0) {
+		ice_dcf_update_stats(&hw->eth_stats_offset, &pstats);
+		stats->ipackets = pstats.rx_unicast + pstats.rx_multicast +
+				pstats.rx_broadcast - pstats.rx_discards;
+		stats->opackets = pstats.tx_broadcast + pstats.tx_multicast +
+						pstats.tx_unicast;
+		stats->imissed = pstats.rx_discards;
+		stats->oerrors = pstats.tx_errors + pstats.tx_discards;
+		stats->ibytes = pstats.rx_bytes;
+		stats->ibytes -= stats->ipackets * RTE_ETHER_CRC_LEN;
+		stats->obytes = pstats.tx_bytes;
+	} else {
+		PMD_DRV_LOG(ERR, "Get statistics failed");
+	}
+	return ret;
+}
+
+static int
+ice_dcf_stats_reset(struct rte_eth_dev *dev)
+{
+	struct ice_dcf_adapter *ad = dev->data->dev_private;
+	struct ice_dcf_hw *hw = &ad->real_hw;
+	struct virtchnl_eth_stats pstats;
+	int ret;
+
+	/* read stat values to clear hardware registers */
+	ret = ice_dcf_query_stats(hw, &pstats);
+	if (ret != 0)
+		return ret;
+
+	/* set stats offset base on current values */
+	hw->eth_stats_offset = pstats;
+
+	return 0;
+}
+
 static void
 ice_dcf_dev_close(struct rte_eth_dev *dev)
 {
-- 
2.17.1