[PATCH net-next v2 0/4] enic: Report per queue stats

[PATCH net-next v2 0/4] enic: Report per queue stats

[Nelson Escobar]

Hi,

This is V2 of a series that adds per queue stats report to enic driver.
Per Jakub's suggestion, I've added support for reporting the stats in netdev
qstats.  I've also split out the ethtool reporting into its own patch.

Patch #1: Use a macro instead of static const variables for array sizes.  I
          didn't want to add more static const variables in the next patch
          so clean up the existing ones first.

Patch #2: Collect per queue statistics

Patch #3: Report per queue stats in ethtool

Patch #4: Report per queue stats in netdev qstats

---

v2:
  - Split the ethtool stats reporting into its own patch
  - Added a patch for reporting stats with netdev qstats per Jakub's
    suggestion
v1: https://lore.kernel.org/all/20240823235401.29996-1-neescoba@cisco.com/

Nelson Escobar (4):
  enic: Use macro instead of static const variables for array sizes
  enic: Collect per queue statistics
  enic: Report per queue statistics in ethtool
  enic: Report per queue statistics in netdev qstats

 drivers/net/ethernet/cisco/enic/enic.h        |  38 ++++-
 .../net/ethernet/cisco/enic/enic_ethtool.c    | 114 +++++++++++--
 drivers/net/ethernet/cisco/enic/enic_main.c   | 157 +++++++++++++++---
 3 files changed, 277 insertions(+), 32 deletions(-)

-- 
2.35.2

[PATCH net-next v2 1/4] enic: Use macro instead of static const variables for array sizes

[Nelson Escobar]

In enic_ethtool.c there is no need to use static const variables to store
array sizes when a macro can be used instead.

Signed-off-by: Nelson Escobar <neescoba@cisco.com>
Signed-off-by: John Daley <johndale@cisco.com>
Signed-off-by: Satish Kharat <satishkh@cisco.com>
---
 .../net/ethernet/cisco/enic/enic_ethtool.c    | 23 +++++++++++--------
 1 file changed, 13 insertions(+), 10 deletions(-)

diff --git a/drivers/net/ethernet/cisco/enic/enic_ethtool.c b/drivers/net/ethernet/cisco/enic/enic_ethtool.c
index f2f1055880b2..b71146209334 100644
--- a/drivers/net/ethernet/cisco/enic/enic_ethtool.c
+++ b/drivers/net/ethernet/cisco/enic/enic_ethtool.c
@@ -46,6 +46,8 @@ static const struct enic_stat enic_tx_stats[] = {
 	ENIC_TX_STAT(tx_tso),
 };
 
+#define NUM_ENIC_TX_STATS	ARRAY_SIZE(enic_tx_stats)
+
 static const struct enic_stat enic_rx_stats[] = {
 	ENIC_RX_STAT(rx_frames_ok),
 	ENIC_RX_STAT(rx_frames_total),
@@ -70,13 +72,13 @@ static const struct enic_stat enic_rx_stats[] = {
 	ENIC_RX_STAT(rx_frames_to_max),
 };
 
+#define NUM_ENIC_RX_STATS	ARRAY_SIZE(enic_rx_stats)
+
 static const struct enic_stat enic_gen_stats[] = {
 	ENIC_GEN_STAT(dma_map_error),
 };
 
-static const unsigned int enic_n_tx_stats = ARRAY_SIZE(enic_tx_stats);
-static const unsigned int enic_n_rx_stats = ARRAY_SIZE(enic_rx_stats);
-static const unsigned int enic_n_gen_stats = ARRAY_SIZE(enic_gen_stats);
+#define NUM_ENIC_GEN_STATS	ARRAY_SIZE(enic_gen_stats)
 
 static void enic_intr_coal_set_rx(struct enic *enic, u32 timer)
 {
@@ -145,15 +147,15 @@ static void enic_get_strings(struct net_device *netdev, u32 stringset,
 
 	switch (stringset) {
 	case ETH_SS_STATS:
-		for (i = 0; i < enic_n_tx_stats; i++) {
+		for (i = 0; i < NUM_ENIC_TX_STATS; i++) {
 			memcpy(data, enic_tx_stats[i].name, ETH_GSTRING_LEN);
 			data += ETH_GSTRING_LEN;
 		}
-		for (i = 0; i < enic_n_rx_stats; i++) {
+		for (i = 0; i < NUM_ENIC_RX_STATS; i++) {
 			memcpy(data, enic_rx_stats[i].name, ETH_GSTRING_LEN);
 			data += ETH_GSTRING_LEN;
 		}
-		for (i = 0; i < enic_n_gen_stats; i++) {
+		for (i = 0; i < NUM_ENIC_GEN_STATS; i++) {
 			memcpy(data, enic_gen_stats[i].name, ETH_GSTRING_LEN);
 			data += ETH_GSTRING_LEN;
 		}
@@ -244,7 +246,8 @@ static int enic_get_sset_count(struct net_device *netdev, int sset)
 {
 	switch (sset) {
 	case ETH_SS_STATS:
-		return enic_n_tx_stats + enic_n_rx_stats + enic_n_gen_stats;
+		return NUM_ENIC_TX_STATS + NUM_ENIC_RX_STATS +
+			NUM_ENIC_GEN_STATS;
 	default:
 		return -EOPNOTSUPP;
 	}
@@ -266,11 +269,11 @@ static void enic_get_ethtool_stats(struct net_device *netdev,
 	if (err == -ENOMEM)
 		return;
 
-	for (i = 0; i < enic_n_tx_stats; i++)
+	for (i = 0; i < NUM_ENIC_TX_STATS; i++)
 		*(data++) = ((u64 *)&vstats->tx)[enic_tx_stats[i].index];
-	for (i = 0; i < enic_n_rx_stats; i++)
+	for (i = 0; i < NUM_ENIC_RX_STATS; i++)
 		*(data++) = ((u64 *)&vstats->rx)[enic_rx_stats[i].index];
-	for (i = 0; i < enic_n_gen_stats; i++)
+	for (i = 0; i < NUM_ENIC_GEN_STATS; i++)
 		*(data++) = ((u64 *)&enic->gen_stats)[enic_gen_stats[i].index];
 }
 
-- 
2.35.2

[PATCH net-next v2 2/4] enic: Collect per queue statistics

[Nelson Escobar]

Collect and per rq/wq statistics.

Signed-off-by: Nelson Escobar <neescoba@cisco.com>
Signed-off-by: John Daley <johndale@cisco.com>
Signed-off-by: Satish Kharat <satishkh@cisco.com>
---
 drivers/net/ethernet/cisco/enic/enic.h      |  38 ++++++-
 drivers/net/ethernet/cisco/enic/enic_main.c | 108 ++++++++++++++++----
 2 files changed, 124 insertions(+), 22 deletions(-)

diff --git a/drivers/net/ethernet/cisco/enic/enic.h b/drivers/net/ethernet/cisco/enic/enic.h
index 300ad05ee05b..774ba7415dc4 100644
--- a/drivers/net/ethernet/cisco/enic/enic.h
+++ b/drivers/net/ethernet/cisco/enic/enic.h
@@ -128,6 +128,40 @@ struct vxlan_offload {
 	u8 flags;
 };
 
+struct enic_wq_stats {
+	u64 packets;		/* pkts queued for Tx */
+	u64 stopped;		/* Tx ring almost full, queue stopped */
+	u64 wake;		/* Tx ring no longer full, queue woken up*/
+	u64 tso;		/* non-encap tso pkt */
+	u64 encap_tso;		/* encap vxlan tso pkt */
+	u64 encap_csum;		/* encap vxlan WQ_ENET_OFFLOAD_MODE_CSUM */
+	u64 csum_partial;	/* skb->ip_summed = CHECKSUM_PARTIAL */
+	u64 csum;		/* WQ_ENET_OFFLOAD_MODE_CSUM */
+	u64 bytes;		/* bytes queued for Tx */
+	u64 add_vlan;		/* HW adds vlan tag */
+	u64 cq_work;		/* Tx completions processed */
+	u64 cq_bytes;		/* Tx bytes processed */
+	u64 null_pkt;		/* skb length <= 0 */
+	u64 skb_linear_fail;	/* linearize failures */
+	u64 desc_full_awake;	/* TX ring full while queue awake */
+};
+
+struct enic_rq_stats {
+	u64 packets;			/* pkts received */
+	u64 bytes;			/* bytes received */
+	u64 l4_rss_hash;		/* hashed on l4 */
+	u64 l3_rss_hash;		/* hashed on l3 */
+	u64 csum_unnecessary;		/* HW verified csum */
+	u64 csum_unnecessary_encap;	/* HW verified csum on encap packet */
+	u64 vlan_stripped;		/* HW stripped vlan */
+	u64 napi_complete;		/* napi complete intr reenabled */
+	u64 napi_repoll;		/* napi poll again */
+	u64 bad_fcs;			/* bad pkts */
+	u64 pkt_truncated;		/* truncated pkts */
+	u64 no_skb;			/* out of skbs */
+	u64 desc_skip;			/* Rx pkt went into later buffer */
+};
+
 /* Per-instance private data structure */
 struct enic {
 	struct net_device *netdev;
@@ -162,16 +196,16 @@ struct enic {
 	/* work queue cache line section */
 	____cacheline_aligned struct vnic_wq wq[ENIC_WQ_MAX];
 	spinlock_t wq_lock[ENIC_WQ_MAX];
+	struct enic_wq_stats wq_stats[ENIC_WQ_MAX];
 	unsigned int wq_count;
 	u16 loop_enable;
 	u16 loop_tag;
 
 	/* receive queue cache line section */
 	____cacheline_aligned struct vnic_rq rq[ENIC_RQ_MAX];
+	struct enic_rq_stats rq_stats[ENIC_RQ_MAX];
 	unsigned int rq_count;
 	struct vxlan_offload vxlan;
-	u64 rq_truncated_pkts;
-	u64 rq_bad_fcs;
 	struct napi_struct napi[ENIC_RQ_MAX + ENIC_WQ_MAX];
 
 	/* interrupt resource cache line section */
diff --git a/drivers/net/ethernet/cisco/enic/enic_main.c b/drivers/net/ethernet/cisco/enic/enic_main.c
index 5f26fc3ad655..7d4b44f1abb2 100644
--- a/drivers/net/ethernet/cisco/enic/enic_main.c
+++ b/drivers/net/ethernet/cisco/enic/enic_main.c
@@ -339,6 +339,10 @@ static void enic_free_wq_buf(struct vnic_wq *wq, struct vnic_wq_buf *buf)
 static void enic_wq_free_buf(struct vnic_wq *wq,
 	struct cq_desc *cq_desc, struct vnic_wq_buf *buf, void *opaque)
 {
+	struct enic *enic = (struct enic *)opaque;
+
+	enic->wq_stats[wq->index].cq_work++;
+	enic->wq_stats[wq->index].cq_bytes += buf->len;
 	enic_free_wq_buf(wq, buf);
 }
 
@@ -355,8 +359,10 @@ static int enic_wq_service(struct vnic_dev *vdev, struct cq_desc *cq_desc,
 
 	if (netif_tx_queue_stopped(netdev_get_tx_queue(enic->netdev, q_number)) &&
 	    vnic_wq_desc_avail(&enic->wq[q_number]) >=
-	    (MAX_SKB_FRAGS + ENIC_DESC_MAX_SPLITS))
+	    (MAX_SKB_FRAGS + ENIC_DESC_MAX_SPLITS)) {
 		netif_wake_subqueue(enic->netdev, q_number);
+		enic->wq_stats[q_number].wake++;
+	}
 
 	spin_unlock(&enic->wq_lock[q_number]);
 
@@ -590,6 +596,10 @@ static int enic_queue_wq_skb_vlan(struct enic *enic, struct vnic_wq *wq,
 	if (!eop)
 		err = enic_queue_wq_skb_cont(enic, wq, skb, len_left, loopback);
 
+	enic->wq_stats[wq->index].csum++;
+	enic->wq_stats[wq->index].packets++;
+	enic->wq_stats[wq->index].bytes += skb->len;
+
 	return err;
 }
 
@@ -622,6 +632,10 @@ static int enic_queue_wq_skb_csum_l4(struct enic *enic, struct vnic_wq *wq,
 	if (!eop)
 		err = enic_queue_wq_skb_cont(enic, wq, skb, len_left, loopback);
 
+	enic->wq_stats[wq->index].csum_partial++;
+	enic->wq_stats[wq->index].packets++;
+	enic->wq_stats[wq->index].bytes += skb->len;
+
 	return err;
 }
 
@@ -676,15 +690,18 @@ static int enic_queue_wq_skb_tso(struct enic *enic, struct vnic_wq *wq,
 	unsigned int offset = 0;
 	unsigned int hdr_len;
 	dma_addr_t dma_addr;
+	unsigned int pkts;
 	unsigned int len;
 	skb_frag_t *frag;
 
 	if (skb->encapsulation) {
 		hdr_len = skb_inner_tcp_all_headers(skb);
 		enic_preload_tcp_csum_encap(skb);
+		enic->wq_stats[wq->index].encap_tso++;
 	} else {
 		hdr_len = skb_tcp_all_headers(skb);
 		enic_preload_tcp_csum(skb);
+		enic->wq_stats[wq->index].tso++;
 	}
 
 	/* Queue WQ_ENET_MAX_DESC_LEN length descriptors
@@ -705,7 +722,7 @@ static int enic_queue_wq_skb_tso(struct enic *enic, struct vnic_wq *wq,
 	}
 
 	if (eop)
-		return 0;
+		goto tso_out_stats;
 
 	/* Queue WQ_ENET_MAX_DESC_LEN length descriptors
 	 * for additional data fragments
@@ -732,6 +749,15 @@ static int enic_queue_wq_skb_tso(struct enic *enic, struct vnic_wq *wq,
 		}
 	}
 
+tso_out_stats:
+	/* calculate how many packets tso sent */
+	len = skb->len - hdr_len;
+	pkts = len / mss;
+	if ((len % mss) > 0)
+		pkts++;
+	enic->wq_stats[wq->index].packets += pkts;
+	enic->wq_stats[wq->index].bytes += (len + (pkts * hdr_len));
+
 	return 0;
 }
 
@@ -764,6 +790,10 @@ static inline int enic_queue_wq_skb_encap(struct enic *enic, struct vnic_wq *wq,
 	if (!eop)
 		err = enic_queue_wq_skb_cont(enic, wq, skb, len_left, loopback);
 
+	enic->wq_stats[wq->index].encap_csum++;
+	enic->wq_stats[wq->index].packets++;
+	enic->wq_stats[wq->index].bytes += skb->len;
+
 	return err;
 }
 
@@ -780,6 +810,7 @@ static inline int enic_queue_wq_skb(struct enic *enic,
 		/* VLAN tag from trunking driver */
 		vlan_tag_insert = 1;
 		vlan_tag = skb_vlan_tag_get(skb);
+		enic->wq_stats[wq->index].add_vlan++;
 	} else if (enic->loop_enable) {
 		vlan_tag = enic->loop_tag;
 		loopback = 1;
@@ -792,7 +823,7 @@ static inline int enic_queue_wq_skb(struct enic *enic,
 	else if (skb->encapsulation)
 		err = enic_queue_wq_skb_encap(enic, wq, skb, vlan_tag_insert,
 					      vlan_tag, loopback);
-	else if	(skb->ip_summed == CHECKSUM_PARTIAL)
+	else if (skb->ip_summed == CHECKSUM_PARTIAL)
 		err = enic_queue_wq_skb_csum_l4(enic, wq, skb, vlan_tag_insert,
 						vlan_tag, loopback);
 	else
@@ -825,13 +856,15 @@ static netdev_tx_t enic_hard_start_xmit(struct sk_buff *skb,
 	unsigned int txq_map;
 	struct netdev_queue *txq;
 
+	txq_map = skb_get_queue_mapping(skb) % enic->wq_count;
+	wq = &enic->wq[txq_map];
+
 	if (skb->len <= 0) {
 		dev_kfree_skb_any(skb);
+		enic->wq_stats[wq->index].null_pkt++;
 		return NETDEV_TX_OK;
 	}
 
-	txq_map = skb_get_queue_mapping(skb) % enic->wq_count;
-	wq = &enic->wq[txq_map];
 	txq = netdev_get_tx_queue(netdev, txq_map);
 
 	/* Non-TSO sends must fit within ENIC_NON_TSO_MAX_DESC descs,
@@ -843,6 +876,7 @@ static netdev_tx_t enic_hard_start_xmit(struct sk_buff *skb,
 	    skb_shinfo(skb)->nr_frags + 1 > ENIC_NON_TSO_MAX_DESC &&
 	    skb_linearize(skb)) {
 		dev_kfree_skb_any(skb);
+		enic->wq_stats[wq->index].skb_linear_fail++;
 		return NETDEV_TX_OK;
 	}
 
@@ -854,14 +888,17 @@ static netdev_tx_t enic_hard_start_xmit(struct sk_buff *skb,
 		/* This is a hard error, log it */
 		netdev_err(netdev, "BUG! Tx ring full when queue awake!\n");
 		spin_unlock(&enic->wq_lock[txq_map]);
+		enic->wq_stats[wq->index].desc_full_awake++;
 		return NETDEV_TX_BUSY;
 	}
 
 	if (enic_queue_wq_skb(enic, wq, skb))
 		goto error;
 
-	if (vnic_wq_desc_avail(wq) < MAX_SKB_FRAGS + ENIC_DESC_MAX_SPLITS)
+	if (vnic_wq_desc_avail(wq) < MAX_SKB_FRAGS + ENIC_DESC_MAX_SPLITS) {
 		netif_tx_stop_queue(txq);
+		enic->wq_stats[wq->index].stopped++;
+	}
 	skb_tx_timestamp(skb);
 	if (!netdev_xmit_more() || netif_xmit_stopped(txq))
 		vnic_wq_doorbell(wq);
@@ -878,7 +915,10 @@ static void enic_get_stats(struct net_device *netdev,
 {
 	struct enic *enic = netdev_priv(netdev);
 	struct vnic_stats *stats;
+	u64 pkt_truncated = 0;
+	u64 bad_fcs = 0;
 	int err;
+	int i;
 
 	err = enic_dev_stats_dump(enic, &stats);
 	/* return only when dma_alloc_coherent fails in vnic_dev_stats_dump
@@ -897,8 +937,17 @@ static void enic_get_stats(struct net_device *netdev,
 	net_stats->rx_bytes = stats->rx.rx_bytes_ok;
 	net_stats->rx_errors = stats->rx.rx_errors;
 	net_stats->multicast = stats->rx.rx_multicast_frames_ok;
-	net_stats->rx_over_errors = enic->rq_truncated_pkts;
-	net_stats->rx_crc_errors = enic->rq_bad_fcs;
+
+	for (i = 0; i < ENIC_RQ_MAX; i++) {
+		struct enic_rq_stats *rqs = &enic->rq_stats[i];
+
+		if (!enic->rq->ctrl)
+			break;
+		pkt_truncated += rqs->pkt_truncated;
+		bad_fcs += rqs->bad_fcs;
+	}
+	net_stats->rx_over_errors = pkt_truncated;
+	net_stats->rx_crc_errors = bad_fcs;
 	net_stats->rx_dropped = stats->rx.rx_no_bufs + stats->rx.rx_drop;
 }
 
@@ -1261,8 +1310,10 @@ static int enic_rq_alloc_buf(struct vnic_rq *rq)
 		return 0;
 	}
 	skb = netdev_alloc_skb_ip_align(netdev, len);
-	if (!skb)
+	if (!skb) {
+		enic->rq_stats[rq->index].no_skb++;
 		return -ENOMEM;
+	}
 
 	dma_addr = dma_map_single(&enic->pdev->dev, skb->data, len,
 				  DMA_FROM_DEVICE);
@@ -1313,6 +1364,7 @@ static void enic_rq_indicate_buf(struct vnic_rq *rq,
 	struct net_device *netdev = enic->netdev;
 	struct sk_buff *skb;
 	struct vnic_cq *cq = &enic->cq[enic_cq_rq(enic, rq->index)];
+	struct enic_rq_stats *rqstats = &enic->rq_stats[rq->index];
 
 	u8 type, color, eop, sop, ingress_port, vlan_stripped;
 	u8 fcoe, fcoe_sof, fcoe_fc_crc_ok, fcoe_enc_error, fcoe_eof;
@@ -1323,8 +1375,11 @@ static void enic_rq_indicate_buf(struct vnic_rq *rq,
 	u32 rss_hash;
 	bool outer_csum_ok = true, encap = false;
 
-	if (skipped)
+	rqstats->packets++;
+	if (skipped) {
+		rqstats->desc_skip++;
 		return;
+	}
 
 	skb = buf->os_buf;
 
@@ -1342,9 +1397,9 @@ static void enic_rq_indicate_buf(struct vnic_rq *rq,
 
 		if (!fcs_ok) {
 			if (bytes_written > 0)
-				enic->rq_bad_fcs++;
+				rqstats->bad_fcs++;
 			else if (bytes_written == 0)
-				enic->rq_truncated_pkts++;
+				rqstats->pkt_truncated++;
 		}
 
 		dma_unmap_single(&enic->pdev->dev, buf->dma_addr, buf->len,
@@ -1359,7 +1414,7 @@ static void enic_rq_indicate_buf(struct vnic_rq *rq,
 
 		/* Good receive
 		 */
-
+		rqstats->bytes += bytes_written;
 		if (!enic_rxcopybreak(netdev, &skb, buf, bytes_written)) {
 			buf->os_buf = NULL;
 			dma_unmap_single(&enic->pdev->dev, buf->dma_addr,
@@ -1377,11 +1432,13 @@ static void enic_rq_indicate_buf(struct vnic_rq *rq,
 			case CQ_ENET_RQ_DESC_RSS_TYPE_TCP_IPv6:
 			case CQ_ENET_RQ_DESC_RSS_TYPE_TCP_IPv6_EX:
 				skb_set_hash(skb, rss_hash, PKT_HASH_TYPE_L4);
+				rqstats->l4_rss_hash++;
 				break;
 			case CQ_ENET_RQ_DESC_RSS_TYPE_IPv4:
 			case CQ_ENET_RQ_DESC_RSS_TYPE_IPv6:
 			case CQ_ENET_RQ_DESC_RSS_TYPE_IPv6_EX:
 				skb_set_hash(skb, rss_hash, PKT_HASH_TYPE_L3);
+				rqstats->l3_rss_hash++;
 				break;
 			}
 		}
@@ -1418,11 +1475,16 @@ static void enic_rq_indicate_buf(struct vnic_rq *rq,
 		    (ipv4_csum_ok || ipv6)) {
 			skb->ip_summed = CHECKSUM_UNNECESSARY;
 			skb->csum_level = encap;
+			if (encap)
+				rqstats->csum_unnecessary_encap++;
+			else
+				rqstats->csum_unnecessary++;
 		}
 
-		if (vlan_stripped)
+		if (vlan_stripped) {
 			__vlan_hwaccel_put_tag(skb, htons(ETH_P_8021Q), vlan_tci);
-
+			rqstats->vlan_stripped++;
+		}
 		skb_mark_napi_id(skb, &enic->napi[rq->index]);
 		if (!(netdev->features & NETIF_F_GRO))
 			netif_receive_skb(skb);
@@ -1435,7 +1497,7 @@ static void enic_rq_indicate_buf(struct vnic_rq *rq,
 
 		/* Buffer overflow
 		 */
-
+		rqstats->pkt_truncated++;
 		dma_unmap_single(&enic->pdev->dev, buf->dma_addr, buf->len,
 				 DMA_FROM_DEVICE);
 		dev_kfree_skb_any(skb);
@@ -1526,11 +1588,11 @@ static int enic_poll(struct napi_struct *napi, int budget)
 	int err;
 
 	wq_work_done = vnic_cq_service(&enic->cq[cq_wq], wq_work_to_do,
-				       enic_wq_service, NULL);
+				       enic_wq_service, enic);
 
 	if (budget > 0)
 		rq_work_done = vnic_cq_service(&enic->cq[cq_rq],
-			rq_work_to_do, enic_rq_service, NULL);
+			rq_work_to_do, enic_rq_service, enic);
 
 	/* Accumulate intr event credits for this polling
 	 * cycle.  An intr event is the completion of a
@@ -1568,6 +1630,9 @@ static int enic_poll(struct napi_struct *napi, int budget)
 		if (enic->rx_coalesce_setting.use_adaptive_rx_coalesce)
 			enic_set_int_moderation(enic, &enic->rq[0]);
 		vnic_intr_unmask(&enic->intr[intr]);
+		enic->rq_stats[0].napi_complete++;
+	} else {
+		enic->rq_stats[0].napi_repoll++;
 	}
 
 	return rq_work_done;
@@ -1627,7 +1692,7 @@ static int enic_poll_msix_wq(struct napi_struct *napi, int budget)
 	cq = enic_cq_wq(enic, wq_irq);
 	intr = enic_msix_wq_intr(enic, wq_irq);
 	wq_work_done = vnic_cq_service(&enic->cq[cq], wq_work_to_do,
-				       enic_wq_service, NULL);
+				       enic_wq_service, enic);
 
 	vnic_intr_return_credits(&enic->intr[intr], wq_work_done,
 				 0 /* don't unmask intr */,
@@ -1657,7 +1722,7 @@ static int enic_poll_msix_rq(struct napi_struct *napi, int budget)
 
 	if (budget > 0)
 		work_done = vnic_cq_service(&enic->cq[cq],
-			work_to_do, enic_rq_service, NULL);
+			work_to_do, enic_rq_service, enic);
 
 	/* Return intr event credits for this polling
 	 * cycle.  An intr event is the completion of a
@@ -1693,6 +1758,9 @@ static int enic_poll_msix_rq(struct napi_struct *napi, int budget)
 		if (enic->rx_coalesce_setting.use_adaptive_rx_coalesce)
 			enic_set_int_moderation(enic, &enic->rq[rq]);
 		vnic_intr_unmask(&enic->intr[intr]);
+		enic->rq_stats[rq].napi_complete++;
+	} else {
+		enic->rq_stats[rq].napi_repoll++;
 	}
 
 	return work_done;
-- 
2.35.2

[PATCH net-next v2 3/4] enic: Report per queue statistics in ethtool

[Nelson Escobar]

Make 'ethtool -S <intf>' output show per rq/wq statistics.

Signed-off-by: Nelson Escobar <neescoba@cisco.com>
Signed-off-by: John Daley <johndale@cisco.com>
Signed-off-by: Satish Kharat <satishkh@cisco.com>
---
 .../net/ethernet/cisco/enic/enic_ethtool.c    | 95 ++++++++++++++++++-
 1 file changed, 93 insertions(+), 2 deletions(-)

diff --git a/drivers/net/ethernet/cisco/enic/enic_ethtool.c b/drivers/net/ethernet/cisco/enic/enic_ethtool.c
index b71146209334..50ab04845547 100644
--- a/drivers/net/ethernet/cisco/enic/enic_ethtool.c
+++ b/drivers/net/ethernet/cisco/enic/enic_ethtool.c
@@ -32,6 +32,53 @@ struct enic_stat {
 	.index = offsetof(struct vnic_gen_stats, stat) / sizeof(u64)\
 }
 
+#define ENIC_PER_RQ_STAT(stat) { \
+	.name = "rq[%d]_"#stat, \
+	.index = offsetof(struct enic_rq_stats, stat) / sizeof(u64) \
+}
+
+#define ENIC_PER_WQ_STAT(stat) { \
+	.name = "wq[%d]_"#stat, \
+	.index = offsetof(struct enic_wq_stats, stat) / sizeof(u64) \
+}
+
+static const struct enic_stat enic_per_rq_stats[] = {
+	ENIC_PER_RQ_STAT(packets),
+	ENIC_PER_RQ_STAT(bytes),
+	ENIC_PER_RQ_STAT(l4_rss_hash),
+	ENIC_PER_RQ_STAT(l3_rss_hash),
+	ENIC_PER_RQ_STAT(csum_unnecessary),
+	ENIC_PER_RQ_STAT(csum_unnecessary_encap),
+	ENIC_PER_RQ_STAT(vlan_stripped),
+	ENIC_PER_RQ_STAT(napi_complete),
+	ENIC_PER_RQ_STAT(napi_repoll),
+	ENIC_PER_RQ_STAT(bad_fcs),
+	ENIC_PER_RQ_STAT(pkt_truncated),
+	ENIC_PER_RQ_STAT(no_skb),
+	ENIC_PER_RQ_STAT(desc_skip),
+};
+
+#define NUM_ENIC_PER_RQ_STATS   ARRAY_SIZE(enic_per_rq_stats)
+
+static const struct enic_stat enic_per_wq_stats[] = {
+	ENIC_PER_WQ_STAT(packets),
+	ENIC_PER_WQ_STAT(stopped),
+	ENIC_PER_WQ_STAT(wake),
+	ENIC_PER_WQ_STAT(tso),
+	ENIC_PER_WQ_STAT(encap_tso),
+	ENIC_PER_WQ_STAT(encap_csum),
+	ENIC_PER_WQ_STAT(csum_partial),
+	ENIC_PER_WQ_STAT(csum),
+	ENIC_PER_WQ_STAT(bytes),
+	ENIC_PER_WQ_STAT(add_vlan),
+	ENIC_PER_WQ_STAT(cq_work),
+	ENIC_PER_WQ_STAT(cq_bytes),
+	ENIC_PER_WQ_STAT(null_pkt),
+	ENIC_PER_WQ_STAT(skb_linear_fail),
+	ENIC_PER_WQ_STAT(desc_full_awake),
+};
+
+#define NUM_ENIC_PER_WQ_STATS   ARRAY_SIZE(enic_per_wq_stats)
 static const struct enic_stat enic_tx_stats[] = {
 	ENIC_TX_STAT(tx_frames_ok),
 	ENIC_TX_STAT(tx_unicast_frames_ok),
@@ -143,7 +190,9 @@ static void enic_get_drvinfo(struct net_device *netdev,
 static void enic_get_strings(struct net_device *netdev, u32 stringset,
 	u8 *data)
 {
+	struct enic *enic = netdev_priv(netdev);
 	unsigned int i;
+	unsigned int j;
 
 	switch (stringset) {
 	case ETH_SS_STATS:
@@ -159,6 +208,20 @@ static void enic_get_strings(struct net_device *netdev, u32 stringset,
 			memcpy(data, enic_gen_stats[i].name, ETH_GSTRING_LEN);
 			data += ETH_GSTRING_LEN;
 		}
+		for (i = 0; i < enic->rq_count; i++) {
+			for (j = 0; j < NUM_ENIC_PER_RQ_STATS; j++) {
+				snprintf(data, ETH_GSTRING_LEN,
+					 enic_per_rq_stats[j].name, i);
+				data += ETH_GSTRING_LEN;
+			}
+		}
+		for (i = 0; i < enic->wq_count; i++) {
+			for (j = 0; j < NUM_ENIC_PER_WQ_STATS; j++) {
+				snprintf(data, ETH_GSTRING_LEN,
+					 enic_per_wq_stats[j].name, i);
+				data += ETH_GSTRING_LEN;
+			}
+		}
 		break;
 	}
 }
@@ -244,10 +307,19 @@ static int enic_set_ringparam(struct net_device *netdev,
 
 static int enic_get_sset_count(struct net_device *netdev, int sset)
 {
+	struct enic *enic = netdev_priv(netdev);
+	unsigned int n_per_rq_stats;
+	unsigned int n_per_wq_stats;
+	unsigned int n_stats;
+
 	switch (sset) {
 	case ETH_SS_STATS:
-		return NUM_ENIC_TX_STATS + NUM_ENIC_RX_STATS +
-			NUM_ENIC_GEN_STATS;
+		n_per_rq_stats = NUM_ENIC_PER_RQ_STATS * enic->rq_count;
+		n_per_wq_stats = NUM_ENIC_PER_WQ_STATS * enic->wq_count;
+		n_stats = NUM_ENIC_TX_STATS + NUM_ENIC_RX_STATS +
+			NUM_ENIC_GEN_STATS +
+			n_per_rq_stats + n_per_wq_stats;
+		return n_stats;
 	default:
 		return -EOPNOTSUPP;
 	}
@@ -259,6 +331,7 @@ static void enic_get_ethtool_stats(struct net_device *netdev,
 	struct enic *enic = netdev_priv(netdev);
 	struct vnic_stats *vstats;
 	unsigned int i;
+	unsigned int j;
 	int err;
 
 	err = enic_dev_stats_dump(enic, &vstats);
@@ -275,6 +348,24 @@ static void enic_get_ethtool_stats(struct net_device *netdev,
 		*(data++) = ((u64 *)&vstats->rx)[enic_rx_stats[i].index];
 	for (i = 0; i < NUM_ENIC_GEN_STATS; i++)
 		*(data++) = ((u64 *)&enic->gen_stats)[enic_gen_stats[i].index];
+	for (i = 0; i < enic->rq_count; i++) {
+		struct enic_rq_stats *rqstats = &enic->rq_stats[i];
+		int index;
+
+		for (j = 0; j < NUM_ENIC_PER_RQ_STATS; j++) {
+			index = enic_per_rq_stats[j].index;
+			*(data++) = ((u64 *)rqstats)[index];
+		}
+	}
+	for (i = 0; i < enic->wq_count; i++) {
+		struct enic_wq_stats *wqstats = &enic->wq_stats[i];
+		int index;
+
+		for (j = 0; j < NUM_ENIC_PER_WQ_STATS; j++) {
+			index = enic_per_wq_stats[j].index;
+			*(data++) = ((u64 *)wqstats)[index];
+		}
+	}
 }
 
 static u32 enic_get_msglevel(struct net_device *netdev)
-- 
2.35.2

[PATCH net-next v2 4/4] enic: Report per queue statistics in netdev qstats

[Nelson Escobar]

Report per queue wq/rq statistics in netdev qstats.

Signed-off-by: Nelson Escobar <neescoba@cisco.com>
Signed-off-by: John Daley <johndale@cisco.com>
Signed-off-by: Satish Kharat <satishkh@cisco.com>
---
 drivers/net/ethernet/cisco/enic/enic_main.c | 49 +++++++++++++++++++++
 1 file changed, 49 insertions(+)

diff --git a/drivers/net/ethernet/cisco/enic/enic_main.c b/drivers/net/ethernet/cisco/enic/enic_main.c
index 7d4b44f1abb2..6d86cb5ad6d8 100644
--- a/drivers/net/ethernet/cisco/enic/enic_main.c
+++ b/drivers/net/ethernet/cisco/enic/enic_main.c
@@ -46,6 +46,7 @@
 #include <linux/crash_dump.h>
 #include <net/busy_poll.h>
 #include <net/vxlan.h>
+#include <net/netdev_queues.h>
 
 #include "cq_enet_desc.h"
 #include "vnic_dev.h"
@@ -2570,6 +2571,47 @@ static void enic_clear_intr_mode(struct enic *enic)
 	vnic_dev_set_intr_mode(enic->vdev, VNIC_DEV_INTR_MODE_UNKNOWN);
 }
 
+static void enic_get_queue_stats_rx(struct net_device *dev, int idx,
+				    struct netdev_queue_stats_rx *rxs)
+{
+	struct enic *enic = netdev_priv(dev);
+	struct enic_rq_stats *rqstats = &enic->rq_stats[idx];
+
+	rxs->bytes = rqstats->bytes;
+	rxs->packets = rqstats->packets;
+	rxs->hw_drops = rqstats->bad_fcs + rqstats->pkt_truncated;
+	rxs->hw_drop_overruns = rqstats->pkt_truncated;
+	rxs->csum_unnecessary = rqstats->csum_unnecessary +
+				rqstats->csum_unnecessary_encap;
+}
+
+static void enic_get_queue_stats_tx(struct net_device *dev, int idx,
+				    struct netdev_queue_stats_tx *txs)
+{
+	struct enic *enic = netdev_priv(dev);
+	struct enic_wq_stats *wqstats = &enic->wq_stats[idx];
+
+	txs->bytes = wqstats->bytes;
+	txs->packets = wqstats->packets;
+	txs->stop = wqstats->stopped;
+	txs->wake = wqstats->wake;
+}
+
+static void enic_get_base_stats(struct net_device *dev,
+				struct netdev_queue_stats_rx *rxs,
+				struct netdev_queue_stats_tx *txs)
+{
+	rxs->bytes = 0;
+	rxs->packets = 0;
+	rxs->hw_drops = 0;
+	rxs->hw_drop_overruns = 0;
+	rxs->csum_unnecessary = 0;
+	txs->bytes = 0;
+	txs->packets = 0;
+	txs->stop = 0;
+	txs->wake = 0;
+}
+
 static const struct net_device_ops enic_netdev_dynamic_ops = {
 	.ndo_open		= enic_open,
 	.ndo_stop		= enic_stop,
@@ -2618,6 +2660,12 @@ static const struct net_device_ops enic_netdev_ops = {
 	.ndo_features_check	= enic_features_check,
 };
 
+static const struct netdev_stat_ops enic_netdev_stat_ops = {
+	.get_queue_stats_rx	= enic_get_queue_stats_rx,
+	.get_queue_stats_tx	= enic_get_queue_stats_tx,
+	.get_base_stats		= enic_get_base_stats,
+};
+
 static void enic_dev_deinit(struct enic *enic)
 {
 	unsigned int i;
@@ -2960,6 +3008,7 @@ static int enic_probe(struct pci_dev *pdev, const struct pci_device_id *ent)
 		netdev->netdev_ops = &enic_netdev_dynamic_ops;
 	else
 		netdev->netdev_ops = &enic_netdev_ops;
+	netdev->stat_ops = &enic_netdev_stat_ops;
 
 	netdev->watchdog_timeo = 2 * HZ;
 	enic_set_ethtool_ops(netdev);
-- 
2.35.2

Re: [PATCH net-next v2 4/4] enic: Report per queue statistics in netdev qstats

[Jakub Kicinski]

On Wed,  4 Sep 2024 18:09:00 -0700 Nelson Escobar wrote:
> Report per queue wq/rq statistics in netdev qstats.

Nice! Have you had a chance to run the test?

tools/testing/selftests/drivers/net/stats.py

more info:
https://github.com/linux-netdev/nipa/wiki/Running-driver-tests

Re: [PATCH net-next v2 3/4] enic: Report per queue statistics in ethtool

[Jakub Kicinski]

On Wed,  4 Sep 2024 18:08:59 -0700 Nelson Escobar wrote:
> Make 'ethtool -S <intf>' output show per rq/wq statistics.

> +static const struct enic_stat enic_per_wq_stats[] = {
> +	ENIC_PER_WQ_STAT(packets),
> +	ENIC_PER_WQ_STAT(stopped),

Stats for which structured APIs exist must not be added to ethtool -S
Please filter things which exist in qstat out of ethtool

please see:
https://docs.kernel.org/next/networking/statistics.html#notes-for-driver-authors
(it talks about rtnl_link_stats because only those existed at the time).