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Date: Tue, 1 Sep 2020 14:51:46 -0700
From: David Awogbemila <awogbemila@...gle.com>
To: netdev@...r.kernel.org
Cc: David Awogbemila <awogbemila@...gle.com>
Subject: [PATCH net-next v2 6/9] gve: NIC stats for report-stats and for ethtool
This adds per queue NIC stats to ethtool stats and to report-stats.
These stats are always exposed to guest whether or not the
report-stats flag is turned on.
Signed-off-by: David Awogbemila <awogbemila@...gle.com>
---
drivers/net/ethernet/google/gve/gve.h | 4 +
drivers/net/ethernet/google/gve/gve_adminq.h | 5 ++
drivers/net/ethernet/google/gve/gve_ethtool.c | 83 ++++++++++++++++++-
drivers/net/ethernet/google/gve/gve_main.c | 4 +-
4 files changed, 93 insertions(+), 3 deletions(-)
diff --git a/drivers/net/ethernet/google/gve/gve.h b/drivers/net/ethernet/google/gve/gve.h
index 9957a7d535ad..bc54059f9b2e 100644
--- a/drivers/net/ethernet/google/gve/gve.h
+++ b/drivers/net/ethernet/google/gve/gve.h
@@ -31,6 +31,10 @@
#define GVE_TX_STATS_REPORT_NUM 5
#define GVE_RX_STATS_REPORT_NUM 2
+/* Numbers of NIC tx/rx stats in stats report. */
+#define NIC_TX_STATS_REPORT_NUM 0
+#define NIC_RX_STATS_REPORT_NUM 4
+
/* Interval to schedule a service task, 20000ms. */
#define GVE_SERVICE_TIMER_PERIOD 20000
diff --git a/drivers/net/ethernet/google/gve/gve_adminq.h b/drivers/net/ethernet/google/gve/gve_adminq.h
index b81a3bb76d5e..a6c8c29f0d13 100644
--- a/drivers/net/ethernet/google/gve/gve_adminq.h
+++ b/drivers/net/ethernet/google/gve/gve_adminq.h
@@ -205,6 +205,11 @@ enum gve_stat_names {
TX_LAST_COMPLETION_PROCESSED = 5,
RX_NEXT_EXPECTED_SEQUENCE = 6,
RX_BUFFERS_POSTED = 7,
+ // stats from NIC
+ RX_QUEUE_DROP_CNT = 65,
+ RX_NO_BUFFERS_POSTED = 66,
+ RX_DROPS_PACKET_OVER_MRU = 67,
+ RX_DROPS_INVALID_CHECKSUM = 68,
};
union gve_adminq_command {
diff --git a/drivers/net/ethernet/google/gve/gve_ethtool.c b/drivers/net/ethernet/google/gve/gve_ethtool.c
index 8d70df2447ef..db5642fe966f 100644
--- a/drivers/net/ethernet/google/gve/gve_ethtool.c
+++ b/drivers/net/ethernet/google/gve/gve_ethtool.c
@@ -43,6 +43,8 @@ static const char gve_gstrings_main_stats[][ETH_GSTRING_LEN] = {
static const char gve_gstrings_rx_stats[][ETH_GSTRING_LEN] = {
"rx_posted_desc[%u]", "rx_completed_desc[%u]", "rx_bytes[%u]",
"rx_dropped_pkt[%u]", "rx_copybreak_pkt[%u]", "rx_copied_pkt[%u]",
+ "rx_queue_drop_cnt[%u]", "rx_no_buffers_posted[%u]",
+ "rx_drops_packet_over_mru[%u]", "rx_drops_invalid_checksum[%u]",
};
static const char gve_gstrings_tx_stats[][ETH_GSTRING_LEN] = {
@@ -138,14 +140,30 @@ gve_get_ethtool_stats(struct net_device *netdev,
tmp_rx_desc_err_dropped_pkt, tmp_tx_pkts, tmp_tx_bytes;
u64 rx_buf_alloc_fail, rx_desc_err_dropped_pkt, rx_pkts,
rx_skb_alloc_fail, rx_bytes, tx_pkts, tx_bytes;
+ int stats_idx, base_stats_idx, max_stats_idx;
+ struct stats *report_stats;
+ int *rx_qid_to_stats_idx;
+ int *tx_qid_to_stats_idx;
struct gve_priv *priv;
+ bool skip_nic_stats;
unsigned int start;
int ring;
- int i;
+ int i, j;
ASSERT_RTNL();
priv = netdev_priv(netdev);
+ report_stats = priv->stats_report->stats;
+ rx_qid_to_stats_idx = kmalloc_array(priv->rx_cfg.num_queues,
+ sizeof(int), GFP_KERNEL);
+ if (!rx_qid_to_stats_idx)
+ return;
+ tx_qid_to_stats_idx = kmalloc_array(priv->tx_cfg.num_queues,
+ sizeof(int), GFP_KERNEL);
+ if (!tx_qid_to_stats_idx) {
+ kfree(rx_qid_to_stats_idx);
+ return;
+ }
for (rx_pkts = 0, rx_bytes = 0, rx_skb_alloc_fail = 0,
rx_buf_alloc_fail = 0, rx_desc_err_dropped_pkt = 0, ring = 0;
ring < priv->rx_cfg.num_queues; ring++) {
@@ -206,6 +224,25 @@ gve_get_ethtool_stats(struct net_device *netdev,
data[i++] = priv->dma_mapping_error;
i = GVE_MAIN_STATS_LEN;
+ /* For rx cross-reporting stats, start from nic rx stats in report */
+ base_stats_idx = GVE_TX_STATS_REPORT_NUM * priv->tx_cfg.num_queues +
+ GVE_RX_STATS_REPORT_NUM * priv->rx_cfg.num_queues;
+ max_stats_idx = NIC_RX_STATS_REPORT_NUM * priv->rx_cfg.num_queues +
+ base_stats_idx;
+ /* Preprocess the stats report for rx, map queue id to start index */
+ skip_nic_stats = false;
+ for (stats_idx = base_stats_idx; stats_idx < max_stats_idx;
+ stats_idx += NIC_RX_STATS_REPORT_NUM) {
+ u32 stat_name = be32_to_cpu(report_stats[stats_idx].stat_name);
+ u32 queue_id = be32_to_cpu(report_stats[stats_idx].queue_id);
+
+ if (stat_name == 0) {
+ /* no stats written by NIC yet */
+ skip_nic_stats = true;
+ break;
+ }
+ rx_qid_to_stats_idx[queue_id] = stats_idx;
+ }
/* walk RX rings */
if (priv->rx) {
for (ring = 0; ring < priv->rx_cfg.num_queues; ring++) {
@@ -230,11 +267,41 @@ gve_get_ethtool_stats(struct net_device *netdev,
tmp_rx_desc_err_dropped_pkt;
data[i++] = rx->rx_copybreak_pkt;
data[i++] = rx->rx_copied_pkt;
+ /* stats from NIC */
+ if (skip_nic_stats) {
+ /* skip NIC rx stats */
+ i += NIC_RX_STATS_REPORT_NUM;
+ continue;
+ }
+ for (j = 0; j < NIC_RX_STATS_REPORT_NUM; j++) {
+ u64 value =
+ be64_to_cpu(report_stats[rx_qid_to_stats_idx[ring] + j].value);
+
+ data[i++] = value;
+ }
}
} else {
i += priv->rx_cfg.num_queues * NUM_GVE_RX_CNTS;
}
+ /* For tx cross-reporting stats, start from nic tx stats in report */
+ base_stats_idx = max_stats_idx;
+ max_stats_idx = NIC_TX_STATS_REPORT_NUM * priv->tx_cfg.num_queues +
+ max_stats_idx;
+ /* Preprocess the stats report for tx, map queue id to start index */
+ skip_nic_stats = false;
+ for (stats_idx = base_stats_idx; stats_idx < max_stats_idx;
+ stats_idx += NIC_TX_STATS_REPORT_NUM) {
+ u32 stat_name = be32_to_cpu(report_stats[stats_idx].stat_name);
+ u32 queue_id = be32_to_cpu(report_stats[stats_idx].queue_id);
+
+ if (stat_name == 0) {
+ /* no stats written by NIC yet */
+ skip_nic_stats = true;
+ break;
+ }
+ tx_qid_to_stats_idx[queue_id] = stats_idx;
+ }
/* walk TX rings */
if (priv->tx) {
for (ring = 0; ring < priv->tx_cfg.num_queues; ring++) {
@@ -253,11 +320,25 @@ gve_get_ethtool_stats(struct net_device *netdev,
data[i++] = tx->stop_queue;
data[i++] = be32_to_cpu(gve_tx_load_event_counter(priv,
tx));
+ /* stats from NIC */
+ if (skip_nic_stats) {
+ /* skip NIC tx stats */
+ i += NIC_TX_STATS_REPORT_NUM;
+ continue;
+ }
+ for (j = 0; j < NIC_TX_STATS_REPORT_NUM; j++) {
+ u64 value =
+ be64_to_cpu(report_stats[tx_qid_to_stats_idx[ring] + j].value);
+ data[i++] = value;
+ }
}
} else {
i += priv->tx_cfg.num_queues * NUM_GVE_TX_CNTS;
}
+ kfree(rx_qid_to_stats_idx);
+ kfree(tx_qid_to_stats_idx);
+
/* AQ Stats */
data[i++] = priv->adminq_prod_cnt;
data[i++] = priv->adminq_cmd_fail;
diff --git a/drivers/net/ethernet/google/gve/gve_main.c b/drivers/net/ethernet/google/gve/gve_main.c
index b76fc547cf5d..0c94dda67ba4 100644
--- a/drivers/net/ethernet/google/gve/gve_main.c
+++ b/drivers/net/ethernet/google/gve/gve_main.c
@@ -101,9 +101,9 @@ static int gve_alloc_stats_report(struct gve_priv *priv)
{
int tx_stats_num, rx_stats_num;
- tx_stats_num = (GVE_TX_STATS_REPORT_NUM) *
+ tx_stats_num = (GVE_TX_STATS_REPORT_NUM + NIC_TX_STATS_REPORT_NUM) *
priv->tx_cfg.num_queues;
- rx_stats_num = (GVE_RX_STATS_REPORT_NUM) *
+ rx_stats_num = (GVE_RX_STATS_REPORT_NUM + NIC_RX_STATS_REPORT_NUM) *
priv->rx_cfg.num_queues;
priv->stats_report_len = sizeof(struct gve_stats_report) +
(tx_stats_num + rx_stats_num) *
--
2.28.0.402.g5ffc5be6b7-goog
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