[dpdk-dev] [PATCH] ethdev: add pause frame counters for em/igb/ixgbe

[Ivan Boule]

Add into the `rte_eth_stats` data structure 4 (64-bit) counters
of XOFF/XON pause frames received and sent on a given port.

Update em, igb, and ixgbe drivers to return the value of the 4 XOFF/XON
counters through the `rte_eth_stats_get` function exported by the DPDK
API.

Display the value of the 4 XOFF/XON counters in the `testpmd` application.

Signed-off-by: Ivan Boule <ivan.boule at 6wind.com>
---
 app/test-pmd/config.c               |    8 ++++++++
 app/test-pmd/testpmd.c              |   10 ++++++++++
 lib/librte_ether/rte_ethdev.h       |    4 ++++
 lib/librte_pmd_e1000/em_ethdev.c    |    6 ++++++
 lib/librte_pmd_e1000/igb_ethdev.c   |    6 ++++++
 lib/librte_pmd_ixgbe/ixgbe_ethdev.c |    6 ++++++
 6 files changed, 40 insertions(+)

diff --git a/app/test-pmd/config.c b/app/test-pmd/config.c
index 0b66671..0be0db8 100644
--- a/app/test-pmd/config.c
+++ b/app/test-pmd/config.c
@@ -167,6 +167,14 @@ nic_stats_display(portid_t port_id)
 		}
 	}
 
+	/* Display statistics of XON/XOFF pause frames, if any. */
+	if ((stats.tx_pause_xon  | stats.rx_pause_xon |
+	     stats.tx_pause_xoff | stats.rx_pause_xoff) > 0) {
+		printf("  RX-XOFF:    %-10"PRIu64" RX-XON:    %-10"PRIu64"\n",
+		       stats.rx_pause_xoff, stats.rx_pause_xon);
+		printf("  TX-XOFF:    %-10"PRIu64" TX-XON:    %-10"PRIu64"\n",
+		       stats.tx_pause_xoff, stats.tx_pause_xon);
+	}
 	printf("  %s############################%s\n",
 	       nic_stats_border, nic_stats_border);
 }
diff --git a/app/test-pmd/testpmd.c b/app/test-pmd/testpmd.c
index 58833ac..69eb26c 100644
--- a/app/test-pmd/testpmd.c
+++ b/app/test-pmd/testpmd.c
@@ -674,6 +674,16 @@ fwd_port_stats_display(portid_t port_id, struct rte_eth_stats *stats)
 		if (stats->rx_nombuf > 0)
 			printf("  RX-nombufs:%14"PRIu64"\n", stats->rx_nombuf);
 	}
+
+	/* Display statistics of XON/XOFF pause frames, if any. */
+	if ((stats->tx_pause_xon  | stats->rx_pause_xon |
+	     stats->tx_pause_xoff | stats->rx_pause_xoff) > 0) {
+		printf("  RX-XOFF:    %-14"PRIu64" RX-XON:     %-14"PRIu64"\n",
+		       stats->rx_pause_xoff, stats->rx_pause_xon);
+		printf("  TX-XOFF:    %-14"PRIu64" TX-XON:     %-14"PRIu64"\n",
+		       stats->tx_pause_xoff, stats->tx_pause_xon);
+	}
+
 #ifdef RTE_TEST_PMD_RECORD_BURST_STATS
 	if (port->rx_stream)
 		pkt_burst_stats_display("RX",
diff --git a/lib/librte_ether/rte_ethdev.h b/lib/librte_ether/rte_ethdev.h
index 86eb295..12ecad1 100644
--- a/lib/librte_ether/rte_ethdev.h
+++ b/lib/librte_ether/rte_ethdev.h
@@ -193,6 +193,10 @@ struct rte_eth_stats {
 	uint64_t rx_nombuf; /**< Total number of RX mbuf allocation failures. */
 	uint64_t fdirmatch; /**< Total number of RX packets matching a filter. */
 	uint64_t fdirmiss;  /**< Total number of RX packets not matching any filter. */
+	uint64_t tx_pause_xon;  /**< Total nb. of XON pause frame sent. */
+	uint64_t rx_pause_xon;  /**< Total nb. of XON pause frame received. */
+	uint64_t tx_pause_xoff; /**< Total nb. of XOFF pause frame sent. */
+	uint64_t rx_pause_xoff; /**< Total nb. of XOFF pause frame received. */
 	uint64_t q_ipackets[RTE_ETHDEV_QUEUE_STAT_CNTRS];
 	/**< Total number of queue RX packets. */
 	uint64_t q_opackets[RTE_ETHDEV_QUEUE_STAT_CNTRS];
diff --git a/lib/librte_pmd_e1000/em_ethdev.c b/lib/librte_pmd_e1000/em_ethdev.c
index d0d2d79..5e00b98 100644
--- a/lib/librte_pmd_e1000/em_ethdev.c
+++ b/lib/librte_pmd_e1000/em_ethdev.c
@@ -801,6 +801,12 @@ eth_em_stats_get(struct rte_eth_dev *dev, struct rte_eth_stats *rte_stats)
 	rte_stats->opackets = stats->gptc;
 	rte_stats->ibytes   = stats->gorc;
 	rte_stats->obytes   = stats->gotc;
+
+	/* XON/XOFF pause frames stats registers */
+	rte_stats->tx_pause_xon  = stats->xontxc;
+	rte_stats->rx_pause_xon  = stats->xonrxc;
+	rte_stats->tx_pause_xoff = stats->xofftxc;
+	rte_stats->rx_pause_xoff = stats->xoffrxc;
 }
 
 static void
diff --git a/lib/librte_pmd_e1000/igb_ethdev.c b/lib/librte_pmd_e1000/igb_ethdev.c
index 9936583..f62426e 100644
--- a/lib/librte_pmd_e1000/igb_ethdev.c
+++ b/lib/librte_pmd_e1000/igb_ethdev.c
@@ -911,6 +911,12 @@ eth_igb_stats_get(struct rte_eth_dev *dev, struct rte_eth_stats *rte_stats)
 	/* Tx Errors */
 	rte_stats->oerrors = stats->ecol + stats->latecol;
 
+	/* XON/XOFF pause frames */
+	rte_stats->tx_pause_xon  = stats->xontxc;
+	rte_stats->rx_pause_xon  = stats->xonrxc;
+	rte_stats->tx_pause_xoff = stats->xofftxc;
+	rte_stats->rx_pause_xoff = stats->xoffrxc;
+
 	rte_stats->ipackets = stats->gprc;
 	rte_stats->opackets = stats->gptc;
 	rte_stats->ibytes   = stats->gorc;
diff --git a/lib/librte_pmd_ixgbe/ixgbe_ethdev.c b/lib/librte_pmd_ixgbe/ixgbe_ethdev.c
index 1f2d9da..7dab5e2 100644
--- a/lib/librte_pmd_ixgbe/ixgbe_ethdev.c
+++ b/lib/librte_pmd_ixgbe/ixgbe_ethdev.c
@@ -1425,6 +1425,12 @@ ixgbe_dev_stats_get(struct rte_eth_dev *dev, struct rte_eth_stats *stats)
 
 	stats->oerrors  = 0;
 
+	/* XON/XOFF pause frames */
+	stats->tx_pause_xon  = hw_stats->lxontxc;
+	stats->rx_pause_xon  = hw_stats->lxonrxc;
+	stats->tx_pause_xoff = hw_stats->lxofftxc;
+	stats->rx_pause_xoff = hw_stats->lxoffrxc;
+
 	/* Flow Director Stats registers */
 	hw_stats->fdirmatch += IXGBE_READ_REG(hw, IXGBE_FDIRMATCH);
 	hw_stats->fdirmiss += IXGBE_READ_REG(hw, IXGBE_FDIRMISS);
-- 
1.7.10.4