[dpdk-dev] [PATCH v6 5/5] net/ixgbe: new xstats API add ID support for ixgbe

[Kuba Kozak <kubax.kozak@intel.com>]

From: Jacek Piasecki <jacekx.piasecki@intel.com>

To achieve functionality of retrieving only specific statistics
given by application there are two new functions added:
ixgbe_dev_xstats_get_by_ids() which retrieve
values of statistics specified by ids array
and ixgbe_dev_xstats_get_names_by_ids() which retrieve
names of statistics specified by ids array.

Signed-off-by: Jacek Piasecki <jacekx.piasecki@intel.com>
Signed-off-by: Kuba Kozak <kubax.kozak@intel.com>
---
 drivers/net/ixgbe/ixgbe_ethdev.c | 179 +++++++++++++++++++++++++++++++++++++++
 1 file changed, 179 insertions(+)

diff --git a/drivers/net/ixgbe/ixgbe_ethdev.c b/drivers/net/ixgbe/ixgbe_ethdev.c
index 1462324..76a5499 100644
--- a/drivers/net/ixgbe/ixgbe_ethdev.c
+++ b/drivers/net/ixgbe/ixgbe_ethdev.c
@@ -183,12 +183,20 @@ static int ixgbe_dev_xstats_get(struct rte_eth_dev *dev,
 				struct rte_eth_xstat *xstats, unsigned n);
 static int ixgbevf_dev_xstats_get(struct rte_eth_dev *dev,
 				  struct rte_eth_xstat *xstats, unsigned n);
+static int
+ixgbe_dev_xstats_get_by_ids(struct rte_eth_dev *dev, uint64_t *ids,
+		uint64_t *values, unsigned int n);
 static void ixgbe_dev_stats_reset(struct rte_eth_dev *dev);
 static void ixgbe_dev_xstats_reset(struct rte_eth_dev *dev);
 static int ixgbe_dev_xstats_get_names(__rte_unused struct rte_eth_dev *dev,
 	struct rte_eth_xstat_name *xstats_names, __rte_unused unsigned limit);
 static int ixgbevf_dev_xstats_get_names(__rte_unused struct rte_eth_dev *dev,
 	struct rte_eth_xstat_name *xstats_names, __rte_unused unsigned limit);
+static int ixgbe_dev_xstats_get_names_by_ids(
+	__rte_unused struct rte_eth_dev *dev,
+	struct rte_eth_xstat_name *xstats_names,
+	uint64_t *ids,
+	unsigned int limit);
 static int ixgbe_dev_queue_stats_mapping_set(struct rte_eth_dev *eth_dev,
 					     uint16_t queue_id,
 					     uint8_t stat_idx,
@@ -524,9 +532,11 @@ static int ixgbe_dev_udp_tunnel_port_del(struct rte_eth_dev *dev,
 	.link_update          = ixgbe_dev_link_update,
 	.stats_get            = ixgbe_dev_stats_get,
 	.xstats_get           = ixgbe_dev_xstats_get,
+	.xstats_get_by_ids    = ixgbe_dev_xstats_get_by_ids,
 	.stats_reset          = ixgbe_dev_stats_reset,
 	.xstats_reset         = ixgbe_dev_xstats_reset,
 	.xstats_get_names     = ixgbe_dev_xstats_get_names,
+	.xstats_get_names_by_ids = ixgbe_dev_xstats_get_names_by_ids,
 	.queue_stats_mapping_set = ixgbe_dev_queue_stats_mapping_set,
 	.fw_version_get       = ixgbe_fw_version_get,
 	.dev_infos_get        = ixgbe_dev_info_get,
@@ -3095,6 +3105,84 @@ static int ixgbe_dev_xstats_get_names(__rte_unused struct rte_eth_dev *dev,
 	return cnt_stats;
 }
 
+static int ixgbe_dev_xstats_get_names_by_ids(
+	__rte_unused struct rte_eth_dev *dev,
+	struct rte_eth_xstat_name *xstats_names,
+	uint64_t *ids,
+	unsigned int limit)
+{
+	if (!ids) {
+		const unsigned int cnt_stats = ixgbe_xstats_calc_num();
+		unsigned int stat, i, count;
+
+		if (xstats_names != NULL) {
+			count = 0;
+
+			/* Note: limit >= cnt_stats checked upstream
+			 * in rte_eth_xstats_names()
+			 */
+
+			/* Extended stats from ixgbe_hw_stats */
+			for (i = 0; i < IXGBE_NB_HW_STATS; i++) {
+				snprintf(xstats_names[count].name,
+					sizeof(xstats_names[count].name),
+					"%s",
+					rte_ixgbe_stats_strings[i].name);
+				count++;
+			}
+
+			/* MACsec Stats */
+			for (i = 0; i < IXGBE_NB_MACSEC_STATS; i++) {
+				snprintf(xstats_names[count].name,
+					sizeof(xstats_names[count].name),
+					"%s",
+					rte_ixgbe_macsec_strings[i].name);
+				count++;
+			}
+
+			/* RX Priority Stats */
+			for (stat = 0; stat < IXGBE_NB_RXQ_PRIO_STATS; stat++) {
+				for (i = 0; i < IXGBE_NB_RXQ_PRIO_VALUES; i++) {
+					snprintf(xstats_names[count].name,
+					    sizeof(xstats_names[count].name),
+					    "rx_priority%u_%s", i,
+					    rte_ixgbe_rxq_strings[stat].name);
+					count++;
+				}
+			}
+
+			/* TX Priority Stats */
+			for (stat = 0; stat < IXGBE_NB_TXQ_PRIO_STATS; stat++) {
+				for (i = 0; i < IXGBE_NB_TXQ_PRIO_VALUES; i++) {
+					snprintf(xstats_names[count].name,
+					    sizeof(xstats_names[count].name),
+					    "tx_priority%u_%s", i,
+					    rte_ixgbe_txq_strings[stat].name);
+					count++;
+				}
+			}
+		}
+		return cnt_stats;
+	}
+
+	uint16_t i;
+	uint16_t size = ixgbe_xstats_calc_num();
+	struct rte_eth_xstat_name xstats_names_copy[size];
+
+	ixgbe_dev_xstats_get_names_by_ids(dev, xstats_names_copy, NULL,
+			size);
+
+	for (i = 0; i < limit; i++) {
+		if (ids[i] >= size) {
+			PMD_INIT_LOG(ERR, "id value isn't valid");
+			return -1;
+		}
+		strcpy(xstats_names[i].name,
+				xstats_names_copy[ids[i]].name);
+	}
+	return limit;
+}
+
 static int ixgbevf_dev_xstats_get_names(__rte_unused struct rte_eth_dev *dev,
 	struct rte_eth_xstat_name *xstats_names, unsigned limit)
 {
@@ -3185,6 +3273,97 @@ static int ixgbevf_dev_xstats_get_names(__rte_unused struct rte_eth_dev *dev,
 	return count;
 }
 
+static int
+ixgbe_dev_xstats_get_by_ids(struct rte_eth_dev *dev, uint64_t *ids,
+		uint64_t *values, unsigned int n)
+{
+	if (!ids) {
+		struct ixgbe_hw *hw =
+				IXGBE_DEV_PRIVATE_TO_HW(dev->data->dev_private);
+		struct ixgbe_hw_stats *hw_stats =
+				IXGBE_DEV_PRIVATE_TO_STATS(
+						dev->data->dev_private);
+		struct ixgbe_macsec_stats *macsec_stats =
+				IXGBE_DEV_PRIVATE_TO_MACSEC_STATS(
+					dev->data->dev_private);
+		uint64_t total_missed_rx, total_qbrc, total_qprc, total_qprdc;
+		unsigned int i, stat, count = 0;
+
+		count = ixgbe_xstats_calc_num();
+
+		if (!ids && n < count)
+			return count;
+
+		total_missed_rx = 0;
+		total_qbrc = 0;
+		total_qprc = 0;
+		total_qprdc = 0;
+
+		ixgbe_read_stats_registers(hw, hw_stats, macsec_stats,
+				&total_missed_rx, &total_qbrc, &total_qprc,
+				&total_qprdc);
+
+		/* If this is a reset xstats is NULL, and we have cleared the
+		 * registers by reading them.
+		 */
+		if (!ids && !values)
+			return 0;
+
+		/* Extended stats from ixgbe_hw_stats */
+		count = 0;
+		for (i = 0; i < IXGBE_NB_HW_STATS; i++) {
+			values[count] = *(uint64_t *)(((char *)hw_stats) +
+					rte_ixgbe_stats_strings[i].offset);
+			count++;
+		}
+
+		/* MACsec Stats */
+		for (i = 0; i < IXGBE_NB_MACSEC_STATS; i++) {
+			values[count] = *(uint64_t *)(((char *)macsec_stats) +
+					rte_ixgbe_macsec_strings[i].offset);
+			count++;
+		}
+
+		/* RX Priority Stats */
+		for (stat = 0; stat < IXGBE_NB_RXQ_PRIO_STATS; stat++) {
+			for (i = 0; i < IXGBE_NB_RXQ_PRIO_VALUES; i++) {
+				values[count] =
+					*(uint64_t *)(((char *)hw_stats) +
+					rte_ixgbe_rxq_strings[stat].offset +
+					(sizeof(uint64_t) * i));
+				count++;
+			}
+		}
+
+		/* TX Priority Stats */
+		for (stat = 0; stat < IXGBE_NB_TXQ_PRIO_STATS; stat++) {
+			for (i = 0; i < IXGBE_NB_TXQ_PRIO_VALUES; i++) {
+				values[count] =
+					*(uint64_t *)(((char *)hw_stats) +
+					rte_ixgbe_txq_strings[stat].offset +
+					(sizeof(uint64_t) * i));
+				count++;
+			}
+		}
+		return count;
+	}
+
+	uint16_t i;
+	uint16_t size = ixgbe_xstats_calc_num();
+	uint64_t values_copy[size];
+
+	ixgbe_dev_xstats_get_by_ids(dev, NULL, values_copy, size);
+
+	for (i = 0; i < n; i++) {
+		if (ids[i] >= size) {
+			PMD_INIT_LOG(ERR, "id value isn't valid");
+			return -1;
+		}
+		values[i] = values_copy[ids[i]];
+	}
+	return n;
+}
+
 static void
 ixgbe_dev_xstats_reset(struct rte_eth_dev *dev)
 {
-- 
1.9.1