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Date: Tue, 30 Nov 2021 20:14:29 +0100
From: Alexander Lobakin <alexandr.lobakin@...el.com>
To: Shay Agroskin <shayagr@...zon.com>
Cc: Alexander Lobakin <alexandr.lobakin@...el.com>,
"David S. Miller" <davem@...emloft.net>,
Jakub Kicinski <kuba@...nel.org>,
Jesse Brandeburg <jesse.brandeburg@...el.com>,
"Michal Swiatkowski" <michal.swiatkowski@...ux.intel.com>,
Maciej Fijalkowski <maciej.fijalkowski@...el.com>,
Jonathan Corbet <corbet@....net>,
"Arthur Kiyanovski" <akiyano@...zon.com>,
David Arinzon <darinzon@...zon.com>,
"Noam Dagan" <ndagan@...zon.com>,
Saeed Bishara <saeedb@...zon.com>,
"Ioana Ciornei" <ioana.ciornei@....com>,
Claudiu Manoil <claudiu.manoil@....com>,
Tony Nguyen <anthony.l.nguyen@...el.com>,
Thomas Petazzoni <thomas.petazzoni@...tlin.com>,
Marcin Wojtas <mw@...ihalf.com>,
"Russell King" <linux@...linux.org.uk>,
Saeed Mahameed <saeedm@...dia.com>,
"Leon Romanovsky" <leon@...nel.org>,
Alexei Starovoitov <ast@...nel.org>,
"Daniel Borkmann" <daniel@...earbox.net>,
Jesper Dangaard Brouer <hawk@...nel.org>,
Toke Høiland-Jørgensen <toke@...hat.com>,
"John Fastabend" <john.fastabend@...il.com>,
Edward Cree <ecree.xilinx@...il.com>,
"Martin Habets" <habetsm.xilinx@...il.com>,
"Michael S. Tsirkin" <mst@...hat.com>,
Jason Wang <jasowang@...hat.com>,
Andrii Nakryiko <andrii@...nel.org>,
Martin KaFai Lau <kafai@...com>,
Song Liu <songliubraving@...com>, Yonghong Song <yhs@...com>,
KP Singh <kpsingh@...nel.org>,
"Lorenzo Bianconi" <lorenzo@...nel.org>,
Yajun Deng <yajun.deng@...ux.dev>,
"Sergey Ryazanov" <ryazanov.s.a@...il.com>,
David Ahern <dsahern@...nel.org>,
Andrei Vagin <avagin@...il.com>,
Johannes Berg <johannes.berg@...el.com>,
Vladimir Oltean <vladimir.oltean@....com>,
Cong Wang <cong.wang@...edance.com>, netdev@...r.kernel.org,
linux-doc@...r.kernel.org, linux-kernel@...r.kernel.org,
linux-rdma@...r.kernel.org, bpf@...r.kernel.org,
virtualization@...ts.linux-foundation.org
Subject: Re: [PATCH v2 net-next 03/26] ena: implement generic XDP statistics callbacks
From: Shay Agroskin <shayagr@...zon.com>
Date: Mon, 29 Nov 2021 15:34:19 +0200
> Alexander Lobakin <alexandr.lobakin@...el.com> writes:
>
> > ena driver has 6 XDP counters collected per-channel. Add
> > callbacks
> > for getting the number of channels and those counters using
> > generic
> > XDP stats infra.
> >
> > Signed-off-by: Alexander Lobakin <alexandr.lobakin@...el.com>
> > Reviewed-by: Jesse Brandeburg <jesse.brandeburg@...el.com>
> > ---
> > drivers/net/ethernet/amazon/ena/ena_netdev.c | 53
> > ++++++++++++++++++++
> > 1 file changed, 53 insertions(+)
> >
> > diff --git a/drivers/net/ethernet/amazon/ena/ena_netdev.c
> > b/drivers/net/ethernet/amazon/ena/ena_netdev.c
> > index 7d5d885d85d5..83e9b85cc998 100644
> > --- a/drivers/net/ethernet/amazon/ena/ena_netdev.c
> > +++ b/drivers/net/ethernet/amazon/ena/ena_netdev.c
> > @@ -3313,12 +3313,65 @@ static void ena_get_stats64(struct
> > net_device *netdev,
> > stats->tx_errors = 0;
> > }
> >
> > +static int ena_get_xdp_stats_nch(const struct net_device
> > *netdev, u32 attr_id)
> > +{
> > + const struct ena_adapter *adapter = netdev_priv(netdev);
> > +
> > + switch (attr_id) {
> > + case IFLA_XDP_XSTATS_TYPE_XDP:
> > + return adapter->num_io_queues;
> > + default:
> > + return -EOPNOTSUPP;
> > + }
> > +}
> > +
> > +static int ena_get_xdp_stats(const struct net_device *netdev,
> > u32 attr_id,
> > + void *attr_data)
> > +{
> > + const struct ena_adapter *adapter = netdev_priv(netdev);
> > + struct ifla_xdp_stats *xdp_stats = attr_data;
> > + u32 i;
> > +
> > + switch (attr_id) {
> > + case IFLA_XDP_XSTATS_TYPE_XDP:
> > + break;
> > + default:
> > + return -EOPNOTSUPP;
> > + }
> > +
> > + for (i = 0; i < adapter->num_io_queues; i++) {
> > + const struct u64_stats_sync *syncp;
> > + const struct ena_stats_rx *stats;
> > + u32 start;
> > +
> > + stats = &adapter->rx_ring[i].rx_stats;
> > + syncp = &adapter->rx_ring[i].syncp;
> > +
> > + do {
> > + start = u64_stats_fetch_begin_irq(syncp);
> > +
> > + xdp_stats->drop = stats->xdp_drop;
> > + xdp_stats->pass = stats->xdp_pass;
> > + xdp_stats->tx = stats->xdp_tx;
> > + xdp_stats->redirect = stats->xdp_redirect;
> > + xdp_stats->aborted = stats->xdp_aborted;
> > + xdp_stats->invalid = stats->xdp_invalid;
> > + } while (u64_stats_fetch_retry_irq(syncp, start));
> > +
> > + xdp_stats++;
> > + }
> > +
> > + return 0;
> > +}
> > +
>
> Hi,
> thank you for the time you took in adding ENA support, this code
> doesn't update the XDP TX queues (which only available when an XDP
> program is loaded).
>
> In theory the following patch should fix it, but I was unable to
> compile your version of iproute2 and test the patch properly. Can
> you please let me know if I need to do anything special to bring
> up your version of iproute2 and test this patch?
Did you clone 'xdp_stats' branch? I've just rechecked on a freshly
cloned copy, works for me.
> diff --git a/drivers/net/ethernet/amazon/ena/ena_netdev.c
> b/drivers/net/ethernet/amazon/ena/ena_netdev.c
> index 7d5d885d8..4e89a7d60 100644
> --- a/drivers/net/ethernet/amazon/ena/ena_netdev.c
> +++ b/drivers/net/ethernet/amazon/ena/ena_netdev.c
> @@ -3313,12 +3313,85 @@ static void ena_get_stats64(struct
> net_device *netdev,
> stats->tx_errors = 0;
> }
>
> +static int ena_get_xdp_stats_nch(const struct net_device *netdev,
> u32 attr_id)
> +{
> + const struct ena_adapter *adapter = netdev_priv(netdev);
> +
> + switch (attr_id) {
> + case IFLA_XDP_XSTATS_TYPE_XDP:
> + return adapter->num_io_queues;
> + default:
> + return -EOPNOTSUPP;
> + }
> +}
> +
> +static int ena_get_xdp_stats(const struct net_device *netdev, u32
> attr_id,
> + void *attr_data)
> +{
> + const struct ena_adapter *adapter = netdev_priv(netdev);
> + struct ifla_xdp_stats *xdp_stats = attr_data;
> + const struct u64_stats_sync *syncp;
> + u32 start;
> + u32 i;
> +
> + switch (attr_id) {
> + case IFLA_XDP_XSTATS_TYPE_XDP:
> + break;
> + default:
> + return -EOPNOTSUPP;
> + }
> +
> + for (i = 0; i < adapter->num_io_queues; i++) {
> + const struct ena_stats_rx *rx_stats;
> +
> + rx_stats = &adapter->rx_ring[i].rx_stats;
> + syncp = &adapter->rx_ring[i].syncp;
> +
> + do {
> + start = u64_stats_fetch_begin_irq(syncp);
> +
> + xdp_stats->drop = rx_stats->xdp_drop;
> + xdp_stats->pass = rx_stats->xdp_pass;
> + xdp_stats->tx = rx_stats->xdp_tx;
> + xdp_stats->redirect =
> rx_stats->xdp_redirect;
> + xdp_stats->aborted =
> rx_stats->xdp_aborted;
> + xdp_stats->invalid =
> rx_stats->xdp_invalid;
> + } while (u64_stats_fetch_retry_irq(syncp, start));
> +
> + xdp_stats++;
> + }
> +
> + xdp_stats = attr_data;
> + /* xdp_num_queues can be 0 if an XDP program isn't loaded
> */
> + for (i = 0; i < adapter->xdp_num_queues; i++) {
> + const struct ena_stats_tx *tx_stats;
> +
> + tx_stats =
> &adapter->rx_ring[i].xdp_ring->tx_stats;
> + syncp = &adapter->rx_ring[i].xdp_ring->syncp;
> +
> + do {
> + start = u64_stats_fetch_begin_irq(syncp);
> +
> + xdp_stats->xmit_packets = tx_stats->cnt;
> + xdp_stats->xmit_bytes = tx_stats->bytes;
> + xdp_stats->xmit_errors =
> tx_stats->dma_mapping_err +
> +
> tx_stats->prepare_ctx_err;
> + } while (u64_stats_fetch_retry_irq(syncp, start));
> +
> + xdp_stats++;
> + }
> +
> + return 0;
> +}
> +
> static const struct net_device_ops ena_netdev_ops = {
> .ndo_open = ena_open,
> .ndo_stop = ena_close,
> .ndo_start_xmit = ena_start_xmit,
> .ndo_select_queue = ena_select_queue,
> .ndo_get_stats64 = ena_get_stats64,
> + .ndo_get_xdp_stats_nch = ena_get_xdp_stats_nch,
> + .ndo_get_xdp_stats = ena_get_xdp_stats,
> .ndo_tx_timeout = ena_tx_timeout,
> .ndo_change_mtu = ena_change_mtu,
> .ndo_set_mac_address = NULL,
I'll update it in v3 and mention you, thanks!
Al
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