[PATCH] net: mana: Add new MANA VF performance counters for easier troubleshooting

Shradha Gupta
2023-03-14T05:31:13Z

Extended performance counter stats in 'ethtool -S <interface>' output
for MANA VF to facilitate troubleshooting.

Tested-on: Ubuntu22
Signed-off-by: Shradha Gupta <shradhagupta@linux.microsoft.com>
---
drivers/net/ethernet/microsoft/mana/mana_en.c | 67 ++++++++++++++++++-
.../ethernet/microsoft/mana/mana_ethtool.c | 52 +++++++++++++-
include/net/mana/mana.h | 18 +++++
3 files changed, 133 insertions(+), 4 deletions(-)

diff --git a/drivers/net/ethernet/microsoft/mana/mana_en.c b/drivers/net/ethernet/microsoft/mana/mana_en.c
index 6120f2b6684f..9762bdda6df1 100644
--- a/drivers/net/ethernet/microsoft/mana/mana_en.c
+++ b/drivers/net/ethernet/microsoft/mana/mana_en.c
@@ -156,6 +156,8 @@ netdev_tx_t mana_start_xmit(struct sk_buff *skb, struct net_device *ndev)
struct mana_txq *txq;
struct mana_cq *cq;
int err, len;
+ u16 ihs;
+ int hopbyhop = 0;

if (unlikely(!apc->port_is_up))
goto tx_drop;
@@ -166,6 +168,7 @@ netdev_tx_t mana_start_xmit(struct sk_buff *skb, struct net_device *ndev)
txq = &apc->tx_qp[txq_idx].txq;
gdma_sq = txq->gdma_sq;
cq = &apc->tx_qp[txq_idx].tx_cq;
+ tx_stats = &txq->stats;

pkg.tx_oob.s_oob.vcq_num = cq->gdma_id;
pkg.tx_oob.s_oob.vsq_frame = txq->vsq_frame;
@@ -179,10 +182,17 @@ netdev_tx_t mana_start_xmit(struct sk_buff *skb, struct net_device *ndev)

pkg.tx_oob.s_oob.pkt_fmt = pkt_fmt;

- if (pkt_fmt == MANA_SHORT_PKT_FMT)
+ if (pkt_fmt == MANA_SHORT_PKT_FMT) {
pkg.wqe_req.inline_oob_size = sizeof(struct mana_tx_short_oob);
- else
+ u64_stats_update_begin(&tx_stats->syncp);
+ tx_stats->short_pkt_fmt++;
+ u64_stats_update_end(&tx_stats->syncp);
+ } else {
pkg.wqe_req.inline_oob_size = sizeof(struct mana_tx_oob);
+ u64_stats_update_begin(&tx_stats->syncp);
+ tx_stats->long_pkt_fmt++;
+ u64_stats_update_end(&tx_stats->syncp);
+ }

pkg.wqe_req.inline_oob_data = &pkg.tx_oob;
pkg.wqe_req.flags = 0;
@@ -232,9 +242,37 @@ netdev_tx_t mana_start_xmit(struct sk_buff *skb, struct net_device *ndev)
&ipv6_hdr(skb)->daddr, 0,
IPPROTO_TCP, 0);
}
+
+ if (skb->encapsulation) {
+ ihs = skb_inner_tcp_all_headers(skb);
+ u64_stats_update_begin(&tx_stats->syncp);
+ tx_stats->tso_inner_packets++;
+ tx_stats->tso_inner_bytes += skb->len - ihs;
+ u64_stats_update_end(&tx_stats->syncp);
+ } else {
+ if (skb_shinfo(skb)->gso_type & SKB_GSO_UDP_L4) {
+ ihs = skb_transport_offset(skb) + sizeof(struct udphdr);
+ } else {
+ ihs = skb_tcp_all_headers(skb);
+ if (ipv6_has_hopopt_jumbo(skb)) {
+ hopbyhop = sizeof(struct hop_jumbo_hdr);
+ ihs -= sizeof(struct hop_jumbo_hdr);
+ }
+ }
+
+ u64_stats_update_begin(&tx_stats->syncp);
+ tx_stats->tso_packets++;
+ tx_stats->tso_bytes += skb->len - ihs - hopbyhop;
+ u64_stats_update_end(&tx_stats->syncp);
+ }
+
} else if (skb->ip_summed == CHECKSUM_PARTIAL) {
csum_type = mana_checksum_info(skb);

+ u64_stats_update_begin(&tx_stats->syncp);
+ tx_stats->csum_partial++;
+ u64_stats_update_end(&tx_stats->syncp);
+
if (csum_type == IPPROTO_TCP) {
pkg.tx_oob.s_oob.is_outer_ipv4 = ipv4;
pkg.tx_oob.s_oob.is_outer_ipv6 = ipv6;
@@ -254,8 +292,12 @@ netdev_tx_t mana_start_xmit(struct sk_buff *skb, struct net_device *ndev)
}
}

- if (mana_map_skb(skb, apc, &pkg))
+ if (mana_map_skb(skb, apc, &pkg)) {
+ u64_stats_update_begin(&tx_stats->syncp);
+ tx_stats->mana_map_err++;
+ u64_stats_update_end(&tx_stats->syncp);
goto free_sgl_ptr;
+ }

skb_queue_tail(&txq->pending_skbs, skb);

@@ -1038,6 +1080,8 @@ static void mana_poll_tx_cq(struct mana_cq *cq)
if (comp_read < 1)
return;

+ apc->eth_stats.tx_cqes = comp_read;
+
for (i = 0; i < comp_read; i++) {
struct mana_tx_comp_oob *cqe_oob;

@@ -1064,6 +1108,7 @@ static void mana_poll_tx_cq(struct mana_cq *cq)
case CQE_TX_VLAN_TAGGING_VIOLATION:
WARN_ONCE(1, "TX: CQE error %d: ignored.\n",
cqe_oob->cqe_hdr.cqe_type);
+ apc->eth_stats.tx_cqe_err++;
break;

default:
@@ -1072,6 +1117,7 @@ static void mana_poll_tx_cq(struct mana_cq *cq)
*/
WARN_ONCE(1, "TX: Unexpected CQE type %d: HW BUG?\n",
cqe_oob->cqe_hdr.cqe_type);
+ apc->eth_stats.tx_cqe_unknown_type++;
return;
}

@@ -1118,6 +1164,8 @@ static void mana_poll_tx_cq(struct mana_cq *cq)
WARN_ON_ONCE(1);

cq->work_done = pkt_transmitted;
+
+ apc->eth_stats.tx_cqes -= pkt_transmitted;
}

static void mana_post_pkt_rxq(struct mana_rxq *rxq)
@@ -1255,9 +1303,12 @@ static void mana_process_rx_cqe(struct mana_rxq *rxq, struct mana_cq *cq,
struct device *dev = gc->dev;
void *new_buf, *old_buf;
struct page *new_page;
+ struct mana_port_context *apc;
u32 curr, pktlen;
dma_addr_t da;

+ apc = netdev_priv(ndev);
+
switch (oob->cqe_hdr.cqe_type) {
case CQE_RX_OKAY:
break;
@@ -1270,6 +1321,7 @@ static void mana_process_rx_cqe(struct mana_rxq *rxq, struct mana_cq *cq,

case CQE_RX_COALESCED_4:
netdev_err(ndev, "RX coalescing is unsupported\n");
+ apc->eth_stats.rx_coalesced_err++;
return;

case CQE_RX_OBJECT_FENCE:
@@ -1279,6 +1331,7 @@ static void mana_process_rx_cqe(struct mana_rxq *rxq, struct mana_cq *cq,
default:
netdev_err(ndev, "Unknown RX CQE type = %d\n",
oob->cqe_hdr.cqe_type);
+ apc->eth_stats.rx_cqe_unknown_type++;
return;
}

@@ -1341,11 +1394,17 @@ static void mana_poll_rx_cq(struct mana_cq *cq)
{
struct gdma_comp *comp = cq->gdma_comp_buf;
struct mana_rxq *rxq = cq->rxq;
+ struct net_device *ndev;
+ struct mana_port_context *apc;
int comp_read, i;

+ ndev = rxq->ndev;
+ apc = netdev_priv(ndev);
+
comp_read = mana_gd_poll_cq(cq->gdma_cq, comp, CQE_POLLING_BUFFER);
WARN_ON_ONCE(comp_read > CQE_POLLING_BUFFER);

+ apc->eth_stats.rx_cqes = comp_read;
rxq->xdp_flush = false;

for (i = 0; i < comp_read; i++) {
@@ -1357,6 +1416,8 @@ static void mana_poll_rx_cq(struct mana_cq *cq)
return;

mana_process_rx_cqe(rxq, cq, &comp[i]);
+
+ apc->eth_stats.rx_cqes--;
}

if (rxq->xdp_flush)
diff --git a/drivers/net/ethernet/microsoft/mana/mana_ethtool.c b/drivers/net/ethernet/microsoft/mana/mana_ethtool.c
index 5b776a33a817..a64c81410dc1 100644
--- a/drivers/net/ethernet/microsoft/mana/mana_ethtool.c
+++ b/drivers/net/ethernet/microsoft/mana/mana_ethtool.c
@@ -13,6 +13,15 @@ static const struct {
} mana_eth_stats[] = {
{"stop_queue", offsetof(struct mana_ethtool_stats, stop_queue)},
{"wake_queue", offsetof(struct mana_ethtool_stats, wake_queue)},
+ {"tx_cqes", offsetof(struct mana_ethtool_stats, tx_cqes)},
+ {"tx_cq_err", offsetof(struct mana_ethtool_stats, tx_cqe_err)},
+ {"tx_cqe_unknown_type", offsetof(struct mana_ethtool_stats,
+ tx_cqe_unknown_type)},
+ {"rx_cqes", offsetof(struct mana_ethtool_stats, rx_cqes)},
+ {"rx_coalesced_err", offsetof(struct mana_ethtool_stats,
+ rx_coalesced_err)},
+ {"rx_cqe_unknown_type", offsetof(struct mana_ethtool_stats,
+ rx_cqe_unknown_type)},
};

static int mana_get_sset_count(struct net_device *ndev, int stringset)
@@ -23,7 +32,8 @@ static int mana_get_sset_count(struct net_device *ndev, int stringset)
if (stringset != ETH_SS_STATS)
return -EINVAL;

- return ARRAY_SIZE(mana_eth_stats) + num_queues * 8;
+ return ARRAY_SIZE(mana_eth_stats) + num_queues *
+ (MANA_STATS_RX_COUNT + MANA_STATS_TX_COUNT);
}

static void mana_get_strings(struct net_device *ndev, u32 stringset, u8 *data)
@@ -61,6 +71,22 @@ static void mana_get_strings(struct net_device *ndev, u32 stringset, u8 *data)
p += ETH_GSTRING_LEN;
sprintf(p, "tx_%d_xdp_xmit", i);
p += ETH_GSTRING_LEN;
+ sprintf(p, "tx_%d_tso_packets", i);
+ p += ETH_GSTRING_LEN;
+ sprintf(p, "tx_%d_tso_bytes", i);
+ p += ETH_GSTRING_LEN;
+ sprintf(p, "tx_%d_tso_inner_packets", i);
+ p += ETH_GSTRING_LEN;
+ sprintf(p, "tx_%d_tso_inner_bytes", i);
+ p += ETH_GSTRING_LEN;
+ sprintf(p, "tx_%d_long_pkt_fmt", i);
+ p += ETH_GSTRING_LEN;
+ sprintf(p, "tx_%d_short_pkt_fmt", i);
+ p += ETH_GSTRING_LEN;
+ sprintf(p, "tx_%d_csum_partial", i);
+ p += ETH_GSTRING_LEN;
+ sprintf(p, "tx_%d_mana_map_err", i);
+ p += ETH_GSTRING_LEN;
}
}

@@ -78,6 +104,14 @@ static void mana_get_ethtool_stats(struct net_device *ndev,
u64 xdp_xmit;
u64 xdp_drop;
u64 xdp_tx;
+ u64 tso_packets;
+ u64 tso_bytes;
+ u64 tso_inner_packets;
+ u64 tso_inner_bytes;
+ u64 long_pkt_fmt;
+ u64 short_pkt_fmt;
+ u64 csum_partial;
+ u64 mana_map_err;
int q, i = 0;

if (!apc->port_is_up)
@@ -113,11 +147,27 @@ static void mana_get_ethtool_stats(struct net_device *ndev,
packets = tx_stats->packets;
bytes = tx_stats->bytes;
xdp_xmit = tx_stats->xdp_xmit;
+ tso_packets = tx_stats->tso_packets;
+ tso_bytes = tx_stats->tso_bytes;
+ tso_inner_packets = tx_stats->tso_inner_packets;
+ tso_inner_bytes = tx_stats->tso_inner_bytes;
+ long_pkt_fmt = tx_stats->long_pkt_fmt;
+ short_pkt_fmt = tx_stats->short_pkt_fmt;
+ csum_partial = tx_stats->csum_partial;
+ mana_map_err = tx_stats->mana_map_err;
} while (u64_stats_fetch_retry(&tx_stats->syncp, start));

data[i++] = packets;
data[i++] = bytes;
data[i++] = xdp_xmit;
+ data[i++] = tso_packets;
+ data[i++] = tso_bytes;
+ data[i++] = tso_inner_packets;
+ data[i++] = tso_inner_bytes;
+ data[i++] = long_pkt_fmt;
+ data[i++] = short_pkt_fmt;
+ data[i++] = csum_partial;
+ data[i++] = mana_map_err;
}
}

diff --git a/include/net/mana/mana.h b/include/net/mana/mana.h
index 3bb579962a14..bb11a6535d80 100644
--- a/include/net/mana/mana.h
+++ b/include/net/mana/mana.h
@@ -48,6 +48,10 @@ enum TRI_STATE {

#define MAX_PORTS_IN_MANA_DEV 256

+/* Update this count whenever the respective structures are changed */
+#define MANA_STATS_RX_COUNT 5
+#define MANA_STATS_TX_COUNT 11
+
struct mana_stats_rx {
u64 packets;
u64 bytes;
@@ -61,6 +65,14 @@ struct mana_stats_tx {
u64 packets;
u64 bytes;
u64 xdp_xmit;
+ u64 tso_packets;
+ u64 tso_bytes;
+ u64 tso_inner_packets;
+ u64 tso_inner_bytes;
+ u64 short_pkt_fmt;
+ u64 long_pkt_fmt;
+ u64 csum_partial;
+ u64 mana_map_err;
struct u64_stats_sync syncp;
};

@@ -331,6 +343,12 @@ struct mana_tx_qp {
struct mana_ethtool_stats {
u64 stop_queue;
u64 wake_queue;
+ u64 tx_cqes;
+ u64 tx_cqe_err;
+ u64 tx_cqe_unknown_type;
+ u64 rx_cqes;
+ u64 rx_coalesced_err;
+ u64 rx_cqe_unknown_type;
};

struct mana_context {
--
2.37.2