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Message-Id: <20240823235401.29996-3-neescoba@cisco.com>
Date: Fri, 23 Aug 2024 16:54:01 -0700
From: Nelson Escobar <neescoba@...co.com>
To: netdev@...r.kernel.org
Cc: satishkh@...co.com, johndale@...co.com,
Nelson Escobar <neescoba@...co.com>
Subject: [PATCH net-next 2/2] enic: Expand statistics gathering and reporting
Collect and report per rq/wq statistics in ethtool.
Signed-off-by: Nelson Escobar <neescoba@...co.com>
Signed-off-by: John Daley <johndale@...co.com>
Signed-off-by: Satish Kharat <satishkh@...co.com>
---
drivers/net/ethernet/cisco/enic/enic.h | 38 +++++++-
.../net/ethernet/cisco/enic/enic_ethtool.c | 95 ++++++++++++++++++-
drivers/net/ethernet/cisco/enic/enic_main.c | 89 +++++++++++++----
3 files changed, 200 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_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)
diff --git a/drivers/net/ethernet/cisco/enic/enic_main.c b/drivers/net/ethernet/cisco/enic/enic_main.c
index 5f26fc3ad655..3dc9e4e6a7af 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]);
@@ -574,6 +580,8 @@ static int enic_queue_wq_skb_vlan(struct enic *enic, struct vnic_wq *wq,
dma_addr_t dma_addr;
int err = 0;
+ enic->wq_stats[wq->index].csum++;
+
dma_addr = dma_map_single(&enic->pdev->dev, skb->data, head_len,
DMA_TO_DEVICE);
if (unlikely(enic_dma_map_check(enic, dma_addr)))
@@ -605,6 +613,8 @@ static int enic_queue_wq_skb_csum_l4(struct enic *enic, struct vnic_wq *wq,
dma_addr_t dma_addr;
int err = 0;
+ enic->wq_stats[wq->index].csum_partial++;
+
dma_addr = dma_map_single(&enic->pdev->dev, skb->data, head_len,
DMA_TO_DEVICE);
if (unlikely(enic_dma_map_check(enic, dma_addr)))
@@ -682,9 +692,11 @@ static int enic_queue_wq_skb_tso(struct enic *enic, struct vnic_wq *wq,
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
@@ -752,6 +764,7 @@ static inline int enic_queue_wq_skb_encap(struct enic *enic, struct vnic_wq *wq,
dma_addr_t dma_addr;
int err = 0;
+ enic->wq_stats[wq->index].encap_csum++;
dma_addr = dma_map_single(&enic->pdev->dev, skb->data, head_len,
DMA_TO_DEVICE);
if (unlikely(enic_dma_map_check(enic, dma_addr)))
@@ -780,6 +793,7 @@ 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;
@@ -825,13 +839,15 @@ 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 +859,7 @@ 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;
}
@@ -854,18 +871,23 @@ 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);
+ enic->wq_stats[wq->index].packets++;
+ enic->wq_stats[wq->index].bytes += skb->len;
error:
spin_unlock(&enic->wq_lock[txq_map]);
@@ -878,7 +900,10 @@ 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 +922,17 @@ 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 +1295,10 @@ 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 +1349,7 @@ 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 +1360,11 @@ 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 +1382,9 @@ 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 +1399,7 @@ 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 +1417,13 @@ 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 +1460,16 @@ 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 +1482,7 @@ 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 +1573,11 @@ 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 +1615,9 @@ 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 +1677,7 @@ 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 +1707,7 @@ 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 +1743,9 @@ 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
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