[dpdk-stable] patch 'net/cxgbe: fix port statistics' has been queued to LTS release 16.11.3

[Yuanhan Liu]

Hi,

FYI, your patch has been queued to LTS release 16.11.3

Note it hasn't been pushed to http://dpdk.org/browse/dpdk-stable yet.
It will be pushed if I get no objections before 07/19/17. So please
shout if anyone has objections.

Thanks.

	--yliu

---
>From a7bd289f483c992d5159cf7359cf0e2b1f61a2ae Mon Sep 17 00:00:00 2001
From: Rahul Lakkireddy <rahul.lakkireddy at chelsio.com>
Date: Sat, 27 May 2017 09:16:27 +0530
Subject: [PATCH] net/cxgbe: fix port statistics

[ upstream commit ea6a99c077212c5b054b951ef0cc19520076f50d ]

Do not count pause frames as part of normal TX/RX Frame/Byte counts.
Also, switch to using software counters rather than hardware for RX
stats.

Fixes: 856505d303f4 ("cxgbe: add port statistics")

Signed-off-by: Rahul Lakkireddy <rahul.lakkireddy at chelsio.com>
Signed-off-by: Kumar Sanghvi <kumaras at chelsio.com>
---
 drivers/net/cxgbe/base/t4_hw.c   | 20 ++++++++++++++++++++
 drivers/net/cxgbe/base/t4_regs.h | 18 ++++++++++++++++++
 drivers/net/cxgbe/cxgbe_ethdev.c |  4 ++--
 3 files changed, 40 insertions(+), 2 deletions(-)

diff --git a/drivers/net/cxgbe/base/t4_hw.c b/drivers/net/cxgbe/base/t4_hw.c
index 9dca8da..19afdac 100644
--- a/drivers/net/cxgbe/base/t4_hw.c
+++ b/drivers/net/cxgbe/base/t4_hw.c
@@ -2136,6 +2136,7 @@ unsigned int t4_get_mps_bg_map(struct adapter *adap, int idx)
 void t4_get_port_stats(struct adapter *adap, int idx, struct port_stats *p)
 {
 	u32 bgmap = t4_get_mps_bg_map(adap, idx);
+	u32 stat_ctl = t4_read_reg(adap, A_MPS_STAT_CTL);
 
 #define GET_STAT(name) \
 	t4_read_reg64(adap, \
@@ -2168,6 +2169,15 @@ void t4_get_port_stats(struct adapter *adap, int idx, struct port_stats *p)
 	p->tx_ppp6             = GET_STAT(TX_PORT_PPP6);
 	p->tx_ppp7             = GET_STAT(TX_PORT_PPP7);
 
+	if (CHELSIO_CHIP_VERSION(adap->params.chip) >= CHELSIO_T5) {
+		if (stat_ctl & F_COUNTPAUSESTATTX) {
+			p->tx_frames -= p->tx_pause;
+			p->tx_octets -= p->tx_pause * 64;
+		}
+		if (stat_ctl & F_COUNTPAUSEMCTX)
+			p->tx_mcast_frames -= p->tx_pause;
+	}
+
 	p->rx_octets           = GET_STAT(RX_PORT_BYTES);
 	p->rx_frames           = GET_STAT(RX_PORT_FRAMES);
 	p->rx_bcast_frames     = GET_STAT(RX_PORT_BCAST);
@@ -2195,6 +2205,16 @@ void t4_get_port_stats(struct adapter *adap, int idx, struct port_stats *p)
 	p->rx_ppp5             = GET_STAT(RX_PORT_PPP5);
 	p->rx_ppp6             = GET_STAT(RX_PORT_PPP6);
 	p->rx_ppp7             = GET_STAT(RX_PORT_PPP7);
+
+	if (CHELSIO_CHIP_VERSION(adap->params.chip) >= CHELSIO_T5) {
+		if (stat_ctl & F_COUNTPAUSESTATRX) {
+			p->rx_frames -= p->rx_pause;
+			p->rx_octets -= p->rx_pause * 64;
+		}
+		if (stat_ctl & F_COUNTPAUSEMCRX)
+			p->rx_mcast_frames -= p->rx_pause;
+	}
+
 	p->rx_ovflow0 = (bgmap & 1) ? GET_STAT_COM(RX_BG_0_MAC_DROP_FRAME) : 0;
 	p->rx_ovflow1 = (bgmap & 2) ? GET_STAT_COM(RX_BG_1_MAC_DROP_FRAME) : 0;
 	p->rx_ovflow2 = (bgmap & 4) ? GET_STAT_COM(RX_BG_2_MAC_DROP_FRAME) : 0;
diff --git a/drivers/net/cxgbe/base/t4_regs.h b/drivers/net/cxgbe/base/t4_regs.h
index 9057e40..9c132dc 100644
--- a/drivers/net/cxgbe/base/t4_regs.h
+++ b/drivers/net/cxgbe/base/t4_regs.h
@@ -553,6 +553,24 @@
 #define V_VF(x) ((x) << S_VF)
 #define G_VF(x) (((x) >> S_VF) & M_VF)
 
+#define A_MPS_STAT_CTL 0x9600
+
+#define S_COUNTPAUSEMCRX    5
+#define V_COUNTPAUSEMCRX(x) ((x) << S_COUNTPAUSEMCRX)
+#define F_COUNTPAUSEMCRX    V_COUNTPAUSEMCRX(1U)
+
+#define S_COUNTPAUSESTATRX    4
+#define V_COUNTPAUSESTATRX(x) ((x) << S_COUNTPAUSESTATRX)
+#define F_COUNTPAUSESTATRX    V_COUNTPAUSESTATRX(1U)
+
+#define S_COUNTPAUSEMCTX    3
+#define V_COUNTPAUSEMCTX(x) ((x) << S_COUNTPAUSEMCTX)
+#define F_COUNTPAUSEMCTX    V_COUNTPAUSEMCTX(1U)
+
+#define S_COUNTPAUSESTATTX    2
+#define V_COUNTPAUSESTATTX(x) ((x) << S_COUNTPAUSESTATTX)
+#define F_COUNTPAUSESTATTX    V_COUNTPAUSESTATTX(1U)
+
 #define A_MPS_PORT_STAT_TX_PORT_BYTES_L 0x400
 #define A_MPS_PORT_STAT_TX_PORT_BYTES_H 0x404
 #define A_MPS_PORT_STAT_TX_PORT_FRAMES_L 0x408
diff --git a/drivers/net/cxgbe/cxgbe_ethdev.c b/drivers/net/cxgbe/cxgbe_ethdev.c
index b7f28eb..06437c1 100644
--- a/drivers/net/cxgbe/cxgbe_ethdev.c
+++ b/drivers/net/cxgbe/cxgbe_ethdev.c
@@ -654,8 +654,6 @@ static void cxgbe_dev_stats_get(struct rte_eth_dev *eth_dev,
 	cxgbe_stats_get(pi, &ps);
 
 	/* RX Stats */
-	eth_stats->ipackets = ps.rx_frames;
-	eth_stats->ibytes   = ps.rx_octets;
 	eth_stats->imissed  = ps.rx_ovflow0 + ps.rx_ovflow1 +
 			      ps.rx_ovflow2 + ps.rx_ovflow3 +
 			      ps.rx_trunc0 + ps.rx_trunc1 +
@@ -675,6 +673,8 @@ static void cxgbe_dev_stats_get(struct rte_eth_dev *eth_dev,
 
 		eth_stats->q_ipackets[i] = rxq->stats.pkts;
 		eth_stats->q_ibytes[i] = rxq->stats.rx_bytes;
+		eth_stats->ipackets += eth_stats->q_ipackets[i];
+		eth_stats->ibytes += eth_stats->q_ibytes[i];
 	}
 
 	for (i = 0; i < pi->n_tx_qsets; i++) {
-- 
2.7.4