Commit 68e9c5de authored by Vijayakannan Ayyathurai's avatar Vijayakannan Ayyathurai Committed by David S. Miller
Browse files

net: stmmac: add ethtool per-queue statistic framework 



Adding generic ethtool per-queue statistic framework to display the
statistics for each rx/tx queue. In future, users can avail it to add
more per-queue specific counters. Number of rx/tx queues displayed is
depending on the available rx/tx queues in that particular MAC config
and this number is limited up to the MTL_MAX_{RX|TX}_QUEUES defined
in the driver.

Ethtool per-queue statistic display will look like below, when users
start adding more counters.

Example:
 q0_tx_statA:
 q0_tx_statB:
 q0_tx_statC:
 |
 q0_tx_statX:
 .
 .
 .
 qMAX_tx_statA:
 qMAX_tx_statB:
 qMAX_tx_statC:
 |
 qMAX_tx_statX:

 q0_rx_statA:
 q0_rx_statB:
 q0_rx_statC:
 |
 q0_rx_statX:
 .
 .
 .
 qMAX_rx_statA:
 qMAX_rx_statB:
 qMAX_rx_statC:
 |
 qMAX_rx_statX:

In addition, this patch has the support on displaying the number of
packets received and transmitted per queue.

Signed-off-by: default avatarVijayakannan Ayyathurai <vijayakannan.ayyathurai@intel.com>
Signed-off-by: default avatarDavid S. Miller <davem@davemloft.net>
parent 1975df88

drivers/net/ethernet/stmicro/stmmac/common.h

+11 −0
Original line number Diff line number Diff line
@@ -58,6 +58,14 @@ 
#undef FRAME_FILTER_DEBUG

/* #define FRAME_FILTER_DEBUG */



struct stmmac_txq_stats {

	unsigned long tx_pkt_n;

};



struct stmmac_rxq_stats {

	unsigned long rx_pkt_n;

};



/* Extra statistic and debug information exposed by ethtool */

struct stmmac_extra_stats {

	/* Transmit errors */
@@ -189,6 +197,9 @@ struct stmmac_extra_stats { 
	unsigned long mtl_est_hlbf;

	unsigned long mtl_est_btre;

	unsigned long mtl_est_btrlm;

	/* per queue statistics */

	struct stmmac_txq_stats txq_stats[MTL_MAX_TX_QUEUES];

	struct stmmac_rxq_stats rxq_stats[MTL_MAX_RX_QUEUES];

};



/* Safety Feature statistics exposed by ethtool */

drivers/net/ethernet/stmicro/stmmac/stmmac_ethtool.c

+64 −1
Original line number Diff line number Diff line
@@ -261,6 +261,16 @@ static const struct stmmac_stats stmmac_mmc[] = { 
};

#define STMMAC_MMC_STATS_LEN ARRAY_SIZE(stmmac_mmc)



static const char stmmac_qstats_tx_string[][ETH_GSTRING_LEN] = {

	"tx_pkt_n",

#define STMMAC_TXQ_STATS ARRAY_SIZE(stmmac_qstats_tx_string)

};



static const char stmmac_qstats_rx_string[][ETH_GSTRING_LEN] = {

	"rx_pkt_n",

#define STMMAC_RXQ_STATS ARRAY_SIZE(stmmac_qstats_rx_string)

};



static void stmmac_ethtool_getdrvinfo(struct net_device *dev,

				      struct ethtool_drvinfo *info)

{
@@ -510,6 +520,31 @@ stmmac_set_pauseparam(struct net_device *netdev, 
	}

}



static void stmmac_get_per_qstats(struct stmmac_priv *priv, u64 *data)

{

	u32 tx_cnt = priv->plat->tx_queues_to_use;

	u32 rx_cnt = priv->plat->rx_queues_to_use;

	int q, stat;

	char *p;



	for (q = 0; q < tx_cnt; q++) {

		p = (char *)priv + offsetof(struct stmmac_priv,

					    xstats.txq_stats[q].tx_pkt_n);

		for (stat = 0; stat < STMMAC_TXQ_STATS; stat++) {

			*data++ = (*(u64 *)p);

			p += sizeof(u64 *);

		}

	}

	for (q = 0; q < rx_cnt; q++) {

		p = (char *)priv + offsetof(struct stmmac_priv,

					    xstats.rxq_stats[q].rx_pkt_n);

		for (stat = 0; stat < STMMAC_RXQ_STATS; stat++) {

			*data++ = (*(u64 *)p);

			p += sizeof(u64 *);

		}

	}

}



static void stmmac_get_ethtool_stats(struct net_device *dev,

				 struct ethtool_stats *dummy, u64 *data)

{
@@ -560,16 +595,21 @@ static void stmmac_get_ethtool_stats(struct net_device *dev, 
		data[j++] = (stmmac_gstrings_stats[i].sizeof_stat ==

			     sizeof(u64)) ? (*(u64 *)p) : (*(u32 *)p);

	}

	stmmac_get_per_qstats(priv, &data[j]);

}



static int stmmac_get_sset_count(struct net_device *netdev, int sset)

{

	struct stmmac_priv *priv = netdev_priv(netdev);

	u32 tx_cnt = priv->plat->tx_queues_to_use;

	u32 rx_cnt = priv->plat->rx_queues_to_use;

	int i, len, safety_len = 0;



	switch (sset) {

	case ETH_SS_STATS:

		len = STMMAC_STATS_LEN;

		len = STMMAC_STATS_LEN +

		      STMMAC_TXQ_STATS * tx_cnt +

		      STMMAC_RXQ_STATS * rx_cnt;



		if (priv->dma_cap.rmon)

			len += STMMAC_MMC_STATS_LEN;
@@ -592,6 +632,28 @@ static int stmmac_get_sset_count(struct net_device *netdev, int sset) 
	}

}



static void stmmac_get_qstats_string(struct stmmac_priv *priv, u8 *data)

{

	u32 tx_cnt = priv->plat->tx_queues_to_use;

	u32 rx_cnt = priv->plat->rx_queues_to_use;

	int q, stat;



	for (q = 0; q < tx_cnt; q++) {

		for (stat = 0; stat < STMMAC_TXQ_STATS; stat++) {

			snprintf(data, ETH_GSTRING_LEN, "q%d_%s", q,

				 stmmac_qstats_tx_string[stat]);

			data += ETH_GSTRING_LEN;

		}

	}

	for (q = 0; q < rx_cnt; q++) {

		for (stat = 0; stat < STMMAC_RXQ_STATS; stat++) {

			snprintf(data, ETH_GSTRING_LEN, "q%d_%s", q,

				 stmmac_qstats_rx_string[stat]);

			data += ETH_GSTRING_LEN;

		}

	}

}



static void stmmac_get_strings(struct net_device *dev, u32 stringset, u8 *data)

{

	int i;
@@ -622,6 +684,7 @@ static void stmmac_get_strings(struct net_device *dev, u32 stringset, u8 *data) 
				ETH_GSTRING_LEN);

			p += ETH_GSTRING_LEN;

		}

		stmmac_get_qstats_string(priv, p);

		break;

	case ETH_SS_TEST:

		stmmac_selftest_get_strings(priv, p);

drivers/net/ethernet/stmicro/stmmac/stmmac_main.c

+5 −0
Original line number Diff line number Diff line
@@ -2500,6 +2500,7 @@ static int stmmac_tx_clean(struct stmmac_priv *priv, int budget, u32 queue) 
			} else {

				priv->dev->stats.tx_packets++;

				priv->xstats.tx_pkt_n++;

				priv->xstats.txq_stats[queue].tx_pkt_n++;

			}

			if (skb)

				stmmac_get_tx_hwtstamp(priv, p, skb);
@@ -5000,6 +5001,9 @@ static int stmmac_rx_zc(struct stmmac_priv *priv, int limit, u32 queue) 


	stmmac_finalize_xdp_rx(priv, xdp_status);



	priv->xstats.rx_pkt_n += count;

	priv->xstats.rxq_stats[queue].rx_pkt_n += count;



	if (xsk_uses_need_wakeup(rx_q->xsk_pool)) {

		if (failure || stmmac_rx_dirty(priv, queue) > 0)

			xsk_set_rx_need_wakeup(rx_q->xsk_pool);
@@ -5287,6 +5291,7 @@ static int stmmac_rx(struct stmmac_priv *priv, int limit, u32 queue) 
	stmmac_rx_refill(priv, queue);



	priv->xstats.rx_pkt_n += count;

	priv->xstats.rxq_stats[queue].rx_pkt_n += count;



	return count;

}