netdev - [PATCH net-next 7/8] dpaa2-eth: Cleanup channel stats

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Date:   Fri, 23 Nov 2018 16:56:36 +0000
From:   Ioana Ciocoi Radulescu <ruxandra.radulescu@....com>
To:     "netdev@...r.kernel.org" <netdev@...r.kernel.org>,
        "davem@...emloft.net" <davem@...emloft.net>
CC:     Ioana Ciornei <ioana.ciornei@....com>
Subject: [PATCH net-next 7/8] dpaa2-eth: Cleanup channel stats

Remove one unused counter. Move the Tx portal busy counter to
the channel stats, since it logically belongs here.

Reorder fields in channel stats structure to match the ethtool
strings order and make it easier to print them with ethtool -S.

Signed-off-by: Ioana Radulescu <ruxandra.radulescu@....com>
---
 drivers/net/ethernet/freescale/dpaa2/dpaa2-eth.c     |  3 +--
 drivers/net/ethernet/freescale/dpaa2/dpaa2-eth.h     | 10 ++++------
 drivers/net/ethernet/freescale/dpaa2/dpaa2-ethtool.c | 18 ++++++------------
 3 files changed, 11 insertions(+), 20 deletions(-)

diff --git a/drivers/net/ethernet/freescale/dpaa2/dpaa2-eth.c b/drivers/net/ethernet/freescale/dpaa2/dpaa2-eth.c
index 3dabee0..995a17d 100644
--- a/drivers/net/ethernet/freescale/dpaa2/dpaa2-eth.c
+++ b/drivers/net/ethernet/freescale/dpaa2/dpaa2-eth.c
@@ -456,7 +456,6 @@ static int consume_frames(struct dpaa2_eth_channel *ch,
 		return 0;
 
 	fq->stats.frames += cleaned;
-	ch->stats.frames += cleaned;
 
 	/* A dequeue operation only pulls frames from a single queue
 	 * into the store. Return the frame queue as an out param.
@@ -776,7 +775,7 @@ static netdev_tx_t dpaa2_eth_tx(struct sk_buff *skb, struct net_device *net_dev)
 		if (err != -EBUSY)
 			break;
 	}
-	percpu_extras->tx_portal_busy += i;
+	fq->channel->stats.tx_portal_busy += i;
 	if (unlikely(err < 0)) {
 		percpu_stats->tx_errors++;
 		/* Clean up everything, including freeing the skb */
diff --git a/drivers/net/ethernet/freescale/dpaa2/dpaa2-eth.h b/drivers/net/ethernet/freescale/dpaa2/dpaa2-eth.h
index 5530a0e..320c0d0 100644
--- a/drivers/net/ethernet/freescale/dpaa2/dpaa2-eth.h
+++ b/drivers/net/ethernet/freescale/dpaa2/dpaa2-eth.h
@@ -231,8 +231,6 @@ struct dpaa2_eth_drv_stats {
 	__u64	tx_reallocs;
 	__u64	rx_sg_frames;
 	__u64	rx_sg_bytes;
-	/* Enqueues retried due to portal busy */
-	__u64	tx_portal_busy;
 };
 
 /* Per-FQ statistics */
@@ -243,14 +241,14 @@ struct dpaa2_eth_fq_stats {
 
 /* Per-channel statistics */
 struct dpaa2_eth_ch_stats {
+	/* Enqueues retried due to portal busy */
+	__u64	tx_portal_busy;
 	/* Volatile dequeues retried due to portal busy */
 	__u64 dequeue_portal_busy;
-	/* Number of CDANs; useful to estimate avg NAPI len */
-	__u64 cdan;
-	/* Number of frames received on queues from this channel */
-	__u64 frames;
 	/* Pull errors */
 	__u64 pull_err;
+	/* Number of CDANs; useful to estimate avg NAPI len */
+	__u64 cdan;
 };
 
 /* Maximum number of queues associated with a DPNI */
diff --git a/drivers/net/ethernet/freescale/dpaa2/dpaa2-ethtool.c b/drivers/net/ethernet/freescale/dpaa2/dpaa2-ethtool.c
index 26bd5a2..3aa7885 100644
--- a/drivers/net/ethernet/freescale/dpaa2/dpaa2-ethtool.c
+++ b/drivers/net/ethernet/freescale/dpaa2/dpaa2-ethtool.c
@@ -40,8 +40,8 @@ static char dpaa2_ethtool_extras[][ETH_GSTRING_LEN] = {
 	"[drv] tx realloc frames",
 	"[drv] rx sg frames",
 	"[drv] rx sg bytes",
-	"[drv] enqueue portal busy",
 	/* Channel stats */
+	"[drv] enqueue portal busy",
 	"[drv] dequeue portal busy",
 	"[drv] channel pull errors",
 	"[drv] cdan",
@@ -174,8 +174,6 @@ static void dpaa2_eth_get_ethtool_stats(struct net_device *net_dev,
 	int j, k, err;
 	int num_cnt;
 	union dpni_statistics dpni_stats;
-	u64 cdan = 0;
-	u64 portal_busy = 0, pull_err = 0;
 	struct dpaa2_eth_priv *priv = netdev_priv(net_dev);
 	struct dpaa2_eth_drv_stats *extras;
 	struct dpaa2_eth_ch_stats *ch_stats;
@@ -212,16 +210,12 @@ static void dpaa2_eth_get_ethtool_stats(struct net_device *net_dev,
 	}
 	i += j;
 
-	for (j = 0; j < priv->num_channels; j++) {
-		ch_stats = &priv->channel[j]->stats;
-		cdan += ch_stats->cdan;
-		portal_busy += ch_stats->dequeue_portal_busy;
-		pull_err += ch_stats->pull_err;
+	/* Per-channel stats */
+	for (k = 0; k < priv->num_channels; k++) {
+		ch_stats = &priv->channel[k]->stats;
+		for (j = 0; j < sizeof(*ch_stats) / sizeof(__u64); j++)
+			*((__u64 *)data + i + j) += *((__u64 *)ch_stats + j);
 	}
-
-	*(data + i++) = portal_busy;
-	*(data + i++) = pull_err;
-	*(data + i++) = cdan;
 }
 
 static int prep_eth_rule(struct ethhdr *eth_value, struct ethhdr *eth_mask,
-- 
2.7.4