iv/linux
1
0
Fork 0
Code Issues Pull Requests Actions Packages Projects Releases Wiki Activity

net: mvneta: rely on open-coding updating stats for non-xdp and tx path

Browse Source 
In oreder to avoid unnecessary instructions rely on open-coding updating
per-cpu stats in mvneta_tx/mvneta_xdp_submit_frame and mvneta_rx_hwbm
routines. This patch will be used to add xdp support to ethtool for the
mvneta driver

Signed-off-by: Lorenzo Bianconi <lorenzo@kernel.org>
Signed-off-by: David S. Miller <davem@davemloft.net>
This commit is contained in:
Lorenzo Bianconi 2020-02-16 22:07:30 +01:00 committed by David S. Miller
parent 9ac41f3c9f
commit 69de66fcc9
1 changed files with 24 additions and 16 deletions
Show Stats Download Patch File Download Diff File Expand all files Collapse all files

40
drivers/net/ethernet/marvell/mvneta.c
View File

@ -1945,19 +1945,13 @@ static void mvneta_rxq_drop_pkts(struct mvneta_port *pp,
}
static void
mvneta_update_stats(struct mvneta_port *pp, u32 pkts,
u32 len, bool tx)
mvneta_update_stats(struct mvneta_port *pp, u32 pkts, u32 len)
{
struct mvneta_pcpu_stats *stats = this_cpu_ptr(pp->stats);
u64_stats_update_begin(&stats->syncp);
if (tx) {
stats->tx_packets += pkts;
stats->tx_bytes += len;
} else {
stats->rx_packets += pkts;
stats->rx_bytes += len;
}
stats->rx_packets += pkts;
stats->rx_bytes += len;
u64_stats_update_end(&stats->syncp);
}
@ -1996,6 +1990,7 @@ static int
mvneta_xdp_submit_frame(struct mvneta_port *pp, struct mvneta_tx_queue *txq,
struct xdp_frame *xdpf, bool dma_map)
{
struct mvneta_pcpu_stats *stats = this_cpu_ptr(pp->stats);
struct mvneta_tx_desc *tx_desc;
struct mvneta_tx_buf *buf;
dma_addr_t dma_addr;
@ -2030,7 +2025,11 @@ mvneta_xdp_submit_frame(struct mvneta_port *pp, struct mvneta_tx_queue *txq,
tx_desc->buf_phys_addr = dma_addr;
tx_desc->data_size = xdpf->len;
mvneta_update_stats(pp, 1, xdpf->len, true);
u64_stats_update_begin(&stats->syncp);
stats->tx_bytes += xdpf->len;
stats->tx_packets++;
u64_stats_update_end(&stats->syncp);
mvneta_txq_inc_put(txq);
txq->pending++;
txq->count++;
@ -2189,8 +2188,7 @@ mvneta_swbm_rx_frame(struct mvneta_port *pp,
ret = mvneta_run_xdp(pp, rxq, xdp_prog, xdp);
if (ret != MVNETA_XDP_PASS) {
mvneta_update_stats(pp, 1,
xdp->data_end - xdp->data,
false);
xdp->data_end - xdp->data);
rx_desc->buf_phys_addr = 0;
*xdp_ret |= ret;
return ret;
@ -2340,7 +2338,7 @@ static int mvneta_rx_swbm(struct napi_struct *napi,
xdp_do_flush_map();
if (rcvd_pkts)
mvneta_update_stats(pp, rcvd_pkts, rcvd_bytes, false);
mvneta_update_stats(pp, rcvd_pkts, rcvd_bytes);
/* return some buffers to hardware queue, one at a time is too slow */
refill = mvneta_rx_refill_queue(pp, rxq);
@ -2470,8 +2468,14 @@ err_drop_frame:
napi_gro_receive(napi, skb);
}
if (rcvd_pkts)
mvneta_update_stats(pp, rcvd_pkts, rcvd_bytes, false);
if (rcvd_pkts) {
struct mvneta_pcpu_stats *stats = this_cpu_ptr(pp->stats);
u64_stats_update_begin(&stats->syncp);
stats->rx_packets += rcvd_pkts;
stats->rx_bytes += rcvd_bytes;
u64_stats_update_end(&stats->syncp);
}
/* Update rxq management counters */
mvneta_rxq_desc_num_update(pp, rxq, rx_done, rx_done);
@ -2727,6 +2731,7 @@ static netdev_tx_t mvneta_tx(struct sk_buff *skb, struct net_device *dev)
out:
if (frags > 0) {
struct netdev_queue *nq = netdev_get_tx_queue(dev, txq_id);
struct mvneta_pcpu_stats *stats = this_cpu_ptr(pp->stats);
netdev_tx_sent_queue(nq, len);
@ -2740,7 +2745,10 @@ out:
else
txq->pending += frags;
mvneta_update_stats(pp, 1, len, true);
u64_stats_update_begin(&stats->syncp);
stats->tx_bytes += len;
stats->tx_packets++;
u64_stats_update_end(&stats->syncp);
} else {
dev->stats.tx_dropped++;
dev_kfree_skb_any(skb);