[PATCH net-next v2 5/5] mvpp2: xdp ethtool stats

Matteo Croce
2020-07-02T14:15:40Z

From: Sven Auhagen <sven.auhagen@voleatech.de>

Add ethtool statistics for XDP.

Signed-off-by: Sven Auhagen <sven.auhagen@voleatech.de>
---
drivers/net/ethernet/marvell/mvpp2/mvpp2.h | 8 +
.../net/ethernet/marvell/mvpp2/mvpp2_main.c | 158 ++++++++++++++++--
2 files changed, 148 insertions(+), 18 deletions(-)

diff --git a/drivers/net/ethernet/marvell/mvpp2/mvpp2.h b/drivers/net/ethernet/marvell/mvpp2/mvpp2.h
index c52955b33fab..ebec47087b27 100644
--- a/drivers/net/ethernet/marvell/mvpp2/mvpp2.h
+++ b/drivers/net/ethernet/marvell/mvpp2/mvpp2.h
@@ -846,6 +846,14 @@ struct mvpp2_pcpu_stats {
u64 rx_bytes;
u64 tx_packets;
u64 tx_bytes;
+ /* XDP */
+ u64 xdp_redirect;
+ u64 xdp_pass;
+ u64 xdp_drop;
+ u64 xdp_xmit;
+ u64 xdp_xmit_err;
+ u64 xdp_tx;
+ u64 xdp_tx_err;
};

/* Per-CPU port control */
diff --git a/drivers/net/ethernet/marvell/mvpp2/mvpp2_main.c b/drivers/net/ethernet/marvell/mvpp2/mvpp2_main.c
index d49a814311be..d8e238ed533e 100644
--- a/drivers/net/ethernet/marvell/mvpp2/mvpp2_main.c
+++ b/drivers/net/ethernet/marvell/mvpp2/mvpp2_main.c
@@ -1485,6 +1485,16 @@ static void mvpp2_port_loopback_set(struct mvpp2_port *port,
writel(val, port->base + MVPP2_GMAC_CTRL_1_REG);
}

+enum {
+ ETHTOOL_XDP_REDIRECT,
+ ETHTOOL_XDP_PASS,
+ ETHTOOL_XDP_DROP,
+ ETHTOOL_XDP_TX,
+ ETHTOOL_XDP_TX_ERR,
+ ETHTOOL_XDP_XMIT,
+ ETHTOOL_XDP_XMIT_ERR,
+};
+
struct mvpp2_ethtool_counter {
unsigned int offset;
const char string[ETH_GSTRING_LEN];
@@ -1577,10 +1587,21 @@ static const struct mvpp2_ethtool_counter mvpp2_ethtool_rxq_regs[] = {
{ MVPP2_RX_PKTS_BM_DROP_CTR, "rxq_%d_packets_bm_drops" },
};

+static const struct mvpp2_ethtool_counter mvpp2_ethtool_xdp[] = {
+ { ETHTOOL_XDP_REDIRECT, "rx_xdp_redirect", },
+ { ETHTOOL_XDP_PASS, "rx_xdp_pass", },
+ { ETHTOOL_XDP_DROP, "rx_xdp_drop", },
+ { ETHTOOL_XDP_TX, "rx_xdp_tx", },
+ { ETHTOOL_XDP_TX_ERR, "rx_xdp_tx_errors", },
+ { ETHTOOL_XDP_XMIT, "tx_xdp_xmit", },
+ { ETHTOOL_XDP_XMIT_ERR, "tx_xdp_xmit_errors", },
+};
+
#define MVPP2_N_ETHTOOL_STATS(ntxqs, nrxqs) (ARRAY_SIZE(mvpp2_ethtool_mib_regs) + \
ARRAY_SIZE(mvpp2_ethtool_port_regs) + \
(ARRAY_SIZE(mvpp2_ethtool_txq_regs) * (ntxqs)) + \
- (ARRAY_SIZE(mvpp2_ethtool_rxq_regs) * (nrxqs)))
+ (ARRAY_SIZE(mvpp2_ethtool_rxq_regs) * (nrxqs)) + \
+ ARRAY_SIZE(mvpp2_ethtool_xdp))

static void mvpp2_ethtool_get_strings(struct net_device *netdev, u32 sset,
u8 *data)
@@ -1619,10 +1640,57 @@ static void mvpp2_ethtool_get_strings(struct net_device *netdev, u32 sset,
data += ETH_GSTRING_LEN;
}
}
+
+ for (i = 0; i < ARRAY_SIZE(mvpp2_ethtool_xdp); i++) {
+ strscpy(data, mvpp2_ethtool_xdp[i].string,
+ ETH_GSTRING_LEN);
+ data += ETH_GSTRING_LEN;
+ }
+}
+
+static void
+mvpp2_get_xdp_stats(struct mvpp2_port *port, struct mvpp2_pcpu_stats *xdp_stats)
+{
+ unsigned int start;
+ unsigned int cpu;
+
+ /* Gather XDP Statistics */
+ for_each_possible_cpu(cpu) {
+ struct mvpp2_pcpu_stats *cpu_stats;
+ u64 xdp_redirect;
+ u64 xdp_pass;
+ u64 xdp_drop;
+ u64 xdp_xmit;
+ u64 xdp_xmit_err;
+ u64 xdp_tx;
+ u64 xdp_tx_err;
+
+ cpu_stats = per_cpu_ptr(port->stats, cpu);
+ do {
+ start = u64_stats_fetch_begin_irq(&cpu_stats->syncp);
+ xdp_redirect = cpu_stats->xdp_redirect;
+ xdp_pass = cpu_stats->xdp_pass;
+ xdp_drop = cpu_stats->xdp_drop;
+ xdp_xmit = cpu_stats->xdp_xmit;
+ xdp_xmit_err = cpu_stats->xdp_xmit_err;
+ xdp_tx = cpu_stats->xdp_tx;
+ xdp_tx_err = cpu_stats->xdp_tx_err;
+ } while (u64_stats_fetch_retry_irq(&cpu_stats->syncp, start));
+
+ xdp_stats->xdp_redirect += xdp_redirect;
+ xdp_stats->xdp_pass += xdp_pass;
+ xdp_stats->xdp_drop += xdp_drop;
+ xdp_stats->xdp_xmit += xdp_xmit;
+ xdp_stats->xdp_xmit_err += xdp_xmit_err;
+ xdp_stats->xdp_tx += xdp_tx;
+ xdp_stats->xdp_tx_err += xdp_tx_err;
+ }
}

static void mvpp2_read_stats(struct mvpp2_port *port)
{
+ struct mvpp2_pcpu_stats xdp_stats = {};
+ const struct mvpp2_ethtool_counter *s;
u64 *pstats;
int i, q;

@@ -1650,6 +1718,37 @@ static void mvpp2_read_stats(struct mvpp2_port *port)
*pstats++ += mvpp2_read_index(port->priv,
port->first_rxq + q,
mvpp2_ethtool_rxq_regs[i].offset);
+
+ /* Gather XDP Statistics */
+ mvpp2_get_xdp_stats(port, &xdp_stats);
+
+ for (i = 0, s = mvpp2_ethtool_xdp;
+ s < mvpp2_ethtool_xdp + ARRAY_SIZE(mvpp2_ethtool_xdp);
+ s++, i++) {
+ switch (s->offset) {
+ case ETHTOOL_XDP_REDIRECT:
+ *pstats++ = xdp_stats.xdp_redirect;
+ break;
+ case ETHTOOL_XDP_PASS:
+ *pstats++ = xdp_stats.xdp_pass;
+ break;
+ case ETHTOOL_XDP_DROP:
+ *pstats++ = xdp_stats.xdp_drop;
+ break;
+ case ETHTOOL_XDP_TX:
+ *pstats++ = xdp_stats.xdp_tx;
+ break;
+ case ETHTOOL_XDP_TX_ERR:
+ *pstats++ = xdp_stats.xdp_tx_err;
+ break;
+ case ETHTOOL_XDP_XMIT:
+ *pstats++ = xdp_stats.xdp_xmit;
+ break;
+ case ETHTOOL_XDP_XMIT_ERR:
+ *pstats++ = xdp_stats.xdp_xmit_err;
+ break;
+ }
+ }
}

static void mvpp2_gather_hw_statistics(struct work_struct *work)
@@ -3063,7 +3162,6 @@ static u32 mvpp2_skb_tx_csum(struct mvpp2_port *port, struct sk_buff *skb)
static void mvpp2_xdp_finish_tx(struct mvpp2_port *port, u16 txq_id, int nxmit, int nxmit_byte)
{
unsigned int thread = mvpp2_cpu_to_thread(port->priv, smp_processor_id());
- struct mvpp2_pcpu_stats *stats = per_cpu_ptr(port->stats, thread);
struct mvpp2_tx_queue *aggr_txq;
struct mvpp2_txq_pcpu *txq_pcpu;
struct mvpp2_tx_queue *txq;
@@ -3085,11 +3183,6 @@ static void mvpp2_xdp_finish_tx(struct mvpp2_port *port, u16 txq_id, int nxmit,
if (txq_pcpu->count >= txq_pcpu->stop_threshold)
netif_tx_stop_queue(nq);

- u64_stats_update_begin(&stats->syncp);
- stats->tx_bytes += nxmit_byte;
- stats->tx_packets += nxmit;
- u64_stats_update_end(&stats->syncp);
-
/* Finalize TX processing */
if (!port->has_tx_irqs && txq_pcpu->count >= txq->done_pkts_coal)
mvpp2_txq_done(port, txq, txq_pcpu);
@@ -3162,6 +3255,7 @@ mvpp2_xdp_submit_frame(struct mvpp2_port *port, u16 txq_id,
static int
mvpp2_xdp_xmit_back(struct mvpp2_port *port, struct xdp_buff *xdp)
{
+ struct mvpp2_pcpu_stats *stats = this_cpu_ptr(port->stats);
struct xdp_frame *xdpf;
u16 txq_id;
int ret;
@@ -3176,8 +3270,19 @@ mvpp2_xdp_xmit_back(struct mvpp2_port *port, struct xdp_buff *xdp)
txq_id = mvpp2_cpu_to_thread(port->priv, smp_processor_id()) + (port->ntxqs / 2);

ret = mvpp2_xdp_submit_frame(port, txq_id, xdpf, false);
- if (ret == MVPP2_XDP_TX)
+ if (ret == MVPP2_XDP_TX) {
+ u64_stats_update_begin(&stats->syncp);
+ stats->tx_bytes += xdpf->len;
+ stats->tx_packets++;
+ stats->xdp_tx++;
+ u64_stats_update_end(&stats->syncp);
+
mvpp2_xdp_finish_tx(port, txq_id, 1, xdpf->len);
+ } else {
+ u64_stats_update_begin(&stats->syncp);
+ stats->xdp_tx_err++;
+ u64_stats_update_end(&stats->syncp);
+ }

return ret;
}
@@ -3188,6 +3293,7 @@ mvpp2_xdp_xmit(struct net_device *dev, int num_frame,
{
struct mvpp2_port *port = netdev_priv(dev);
int i, nxmit_byte = 0, nxmit = num_frame;
+ struct mvpp2_pcpu_stats *stats;
u16 txq_id;
u32 ret;

@@ -3212,16 +3318,24 @@ mvpp2_xdp_xmit(struct net_device *dev, int num_frame,
}
}

- if (nxmit > 0)
+ if (likely(nxmit > 0))
mvpp2_xdp_finish_tx(port, txq_id, nxmit, nxmit_byte);

+ stats = this_cpu_ptr(port->stats);
+ u64_stats_update_begin(&stats->syncp);
+ stats->tx_bytes += nxmit_byte;
+ stats->tx_packets += nxmit;
+ stats->xdp_xmit += nxmit;
+ stats->xdp_xmit_err += num_frame - nxmit;
+ u64_stats_update_end(&stats->syncp);
+
return nxmit;
}

static int
mvpp2_run_xdp(struct mvpp2_port *port, struct mvpp2_rx_queue *rxq,
struct bpf_prog *prog, struct xdp_buff *xdp,
- struct page_pool *pp)
+ struct page_pool *pp, struct mvpp2_pcpu_stats *stats)
{
unsigned int len, sync, err;
struct page *page;
@@ -3236,6 +3350,7 @@ mvpp2_run_xdp(struct mvpp2_port *port, struct mvpp2_rx_queue *rxq,

switch (act) {
case XDP_PASS:
+ stats->xdp_pass++;
ret = MVPP2_XDP_PASS;
break;
case XDP_REDIRECT:
@@ -3246,6 +3361,7 @@ mvpp2_run_xdp(struct mvpp2_port *port, struct mvpp2_rx_queue *rxq,
page_pool_put_page(pp, page, sync, true);
} else {
ret = MVPP2_XDP_REDIR;
+ stats->xdp_redirect++;
}
break;
case XDP_TX:
@@ -3265,6 +3381,7 @@ mvpp2_run_xdp(struct mvpp2_port *port, struct mvpp2_rx_queue *rxq,
page = virt_to_head_page(xdp->data);
page_pool_put_page(pp, page, sync, true);
ret = MVPP2_XDP_DROPPED;
+ stats->xdp_drop++;
break;
}

@@ -3276,14 +3393,13 @@ static int mvpp2_rx(struct mvpp2_port *port, struct napi_struct *napi,
int rx_todo, struct mvpp2_rx_queue *rxq)
{
struct net_device *dev = port->dev;
+ struct mvpp2_pcpu_stats ps = {};
enum dma_data_direction dma_dir;
struct bpf_prog *xdp_prog;
struct xdp_buff xdp;
int rx_received;
int rx_done = 0;
u32 xdp_ret = 0;
- u32 rcvd_pkts = 0;
- u32 rcvd_bytes = 0;

rcu_read_lock();

@@ -3358,7 +3474,7 @@ static int mvpp2_rx(struct mvpp2_port *port, struct napi_struct *napi,

xdp_set_data_meta_invalid(&xdp);

- ret = mvpp2_run_xdp(port, rxq, xdp_prog, &xdp, pp);
+ ret = mvpp2_run_xdp(port, rxq, xdp_prog, &xdp, pp, &ps);

if (ret) {
xdp_ret |= ret;
@@ -3368,6 +3484,8 @@ static int mvpp2_rx(struct mvpp2_port *port, struct napi_struct *napi,
goto err_drop_frame;
}

+ ps.rx_packets++;
+ ps.rx_bytes += rx_bytes;
continue;
}
}
@@ -3391,8 +3509,8 @@ static int mvpp2_rx(struct mvpp2_port *port, struct napi_struct *napi,
bm_pool->buf_size, DMA_FROM_DEVICE,
DMA_ATTR_SKIP_CPU_SYNC);

- rcvd_pkts++;
- rcvd_bytes += rx_bytes;
+ ps.rx_packets++;
+ ps.rx_bytes += rx_bytes;

skb_reserve(skb, MVPP2_MH_SIZE + MVPP2_SKB_HEADROOM);
skb_put(skb, rx_bytes);
@@ -3414,12 +3532,16 @@ static int mvpp2_rx(struct mvpp2_port *port, struct napi_struct *napi,
if (xdp_ret & MVPP2_XDP_REDIR)
xdp_do_flush_map();

- if (rcvd_pkts) {
+ if (ps.rx_packets) {
struct mvpp2_pcpu_stats *stats = this_cpu_ptr(port->stats);

u64_stats_update_begin(&stats->syncp);
- stats->rx_packets += rcvd_pkts;
- stats->rx_bytes += rcvd_bytes;
+ stats->rx_packets += ps.rx_packets;
+ stats->rx_bytes += ps.rx_bytes;
+ /* xdp */
+ stats->xdp_redirect += ps.xdp_redirect;
+ stats->xdp_pass += ps.xdp_pass;
+ stats->xdp_drop += ps.xdp_drop;
u64_stats_update_end(&stats->syncp);
}

--
2.26.2