From ab46182d0dcb3a85fb31684246d626192c4a64da Mon Sep 17 00:00:00 2001 From: Stanislav Fomichev Date: Thu, 19 Jan 2023 14:15:32 -0800 Subject: [PATCH] net/mlx4_en: Support RX XDP metadata RX timestamp and hash for now. Tested using the prog from the next patch. Also enabling xdp metadata support; don't see why it's disabled, there is enough headroom.. Cc: John Fastabend Cc: David Ahern Cc: Martin KaFai Lau Cc: Jakub Kicinski Cc: Willem de Bruijn Cc: Jesper Dangaard Brouer Cc: Anatoly Burakov Cc: Alexander Lobakin Cc: Magnus Karlsson Cc: Maryam Tahhan Cc: xdp-hints@xdp-project.net Cc: netdev@vger.kernel.org Reviewed-by: Tariq Toukan Signed-off-by: Stanislav Fomichev Link: https://lore.kernel.org/r/20230119221536.3349901-14-sdf@google.com Signed-off-by: Martin KaFai Lau --- drivers/net/ethernet/mellanox/mlx4/en_clock.c | 13 +++++--- .../net/ethernet/mellanox/mlx4/en_netdev.c | 6 ++++ drivers/net/ethernet/mellanox/mlx4/en_rx.c | 33 ++++++++++++++++++- drivers/net/ethernet/mellanox/mlx4/mlx4_en.h | 5 +++ 4 files changed, 52 insertions(+), 5 deletions(-) diff --git a/drivers/net/ethernet/mellanox/mlx4/en_clock.c b/drivers/net/ethernet/mellanox/mlx4/en_clock.c index 98b5ffb4d729..9e3b76182088 100644 --- a/drivers/net/ethernet/mellanox/mlx4/en_clock.c +++ b/drivers/net/ethernet/mellanox/mlx4/en_clock.c @@ -58,9 +58,7 @@ u64 mlx4_en_get_cqe_ts(struct mlx4_cqe *cqe) return hi | lo; } -void mlx4_en_fill_hwtstamps(struct mlx4_en_dev *mdev, - struct skb_shared_hwtstamps *hwts, - u64 timestamp) +u64 mlx4_en_get_hwtstamp(struct mlx4_en_dev *mdev, u64 timestamp) { unsigned int seq; u64 nsec; @@ -70,8 +68,15 @@ void mlx4_en_fill_hwtstamps(struct mlx4_en_dev *mdev, nsec = timecounter_cyc2time(&mdev->clock, timestamp); } while (read_seqretry(&mdev->clock_lock, seq)); + return ns_to_ktime(nsec); +} + +void mlx4_en_fill_hwtstamps(struct mlx4_en_dev *mdev, + struct skb_shared_hwtstamps *hwts, + u64 timestamp) +{ memset(hwts, 0, sizeof(struct skb_shared_hwtstamps)); - hwts->hwtstamp = ns_to_ktime(nsec); + hwts->hwtstamp = mlx4_en_get_hwtstamp(mdev, timestamp); } /** diff --git a/drivers/net/ethernet/mellanox/mlx4/en_netdev.c b/drivers/net/ethernet/mellanox/mlx4/en_netdev.c index 8800d3f1f55c..af4c4858f397 100644 --- a/drivers/net/ethernet/mellanox/mlx4/en_netdev.c +++ b/drivers/net/ethernet/mellanox/mlx4/en_netdev.c @@ -2889,6 +2889,11 @@ static const struct net_device_ops mlx4_netdev_ops_master = { .ndo_bpf = mlx4_xdp, }; +static const struct xdp_metadata_ops mlx4_xdp_metadata_ops = { + .xmo_rx_timestamp = mlx4_en_xdp_rx_timestamp, + .xmo_rx_hash = mlx4_en_xdp_rx_hash, +}; + struct mlx4_en_bond { struct work_struct work; struct mlx4_en_priv *priv; @@ -3310,6 +3315,7 @@ int mlx4_en_init_netdev(struct mlx4_en_dev *mdev, int port, dev->netdev_ops = &mlx4_netdev_ops_master; else dev->netdev_ops = &mlx4_netdev_ops; + dev->xdp_metadata_ops = &mlx4_xdp_metadata_ops; dev->watchdog_timeo = MLX4_EN_WATCHDOG_TIMEOUT; netif_set_real_num_tx_queues(dev, priv->tx_ring_num[TX]); netif_set_real_num_rx_queues(dev, priv->rx_ring_num); diff --git a/drivers/net/ethernet/mellanox/mlx4/en_rx.c b/drivers/net/ethernet/mellanox/mlx4/en_rx.c index 014a80af2813..0869d4fff17b 100644 --- a/drivers/net/ethernet/mellanox/mlx4/en_rx.c +++ b/drivers/net/ethernet/mellanox/mlx4/en_rx.c @@ -663,8 +663,35 @@ static int check_csum(struct mlx4_cqe *cqe, struct sk_buff *skb, void *va, struct mlx4_en_xdp_buff { struct xdp_buff xdp; + struct mlx4_cqe *cqe; + struct mlx4_en_dev *mdev; + struct mlx4_en_rx_ring *ring; + struct net_device *dev; }; +int mlx4_en_xdp_rx_timestamp(const struct xdp_md *ctx, u64 *timestamp) +{ + struct mlx4_en_xdp_buff *_ctx = (void *)ctx; + + if (unlikely(_ctx->ring->hwtstamp_rx_filter != HWTSTAMP_FILTER_ALL)) + return -EOPNOTSUPP; + + *timestamp = mlx4_en_get_hwtstamp(_ctx->mdev, + mlx4_en_get_cqe_ts(_ctx->cqe)); + return 0; +} + +int mlx4_en_xdp_rx_hash(const struct xdp_md *ctx, u32 *hash) +{ + struct mlx4_en_xdp_buff *_ctx = (void *)ctx; + + if (unlikely(!(_ctx->dev->features & NETIF_F_RXHASH))) + return -EOPNOTSUPP; + + *hash = be32_to_cpu(_ctx->cqe->immed_rss_invalid); + return 0; +} + int mlx4_en_process_rx_cq(struct net_device *dev, struct mlx4_en_cq *cq, int budget) { struct mlx4_en_priv *priv = netdev_priv(dev); @@ -781,8 +808,12 @@ int mlx4_en_process_rx_cq(struct net_device *dev, struct mlx4_en_cq *cq, int bud DMA_FROM_DEVICE); xdp_prepare_buff(&mxbuf.xdp, va - frags[0].page_offset, - frags[0].page_offset, length, false); + frags[0].page_offset, length, true); orig_data = mxbuf.xdp.data; + mxbuf.cqe = cqe; + mxbuf.mdev = priv->mdev; + mxbuf.ring = ring; + mxbuf.dev = dev; act = bpf_prog_run_xdp(xdp_prog, &mxbuf.xdp); diff --git a/drivers/net/ethernet/mellanox/mlx4/mlx4_en.h b/drivers/net/ethernet/mellanox/mlx4/mlx4_en.h index 3d4226ddba5e..544e09b97483 100644 --- a/drivers/net/ethernet/mellanox/mlx4/mlx4_en.h +++ b/drivers/net/ethernet/mellanox/mlx4/mlx4_en.h @@ -796,10 +796,15 @@ void mlx4_en_update_pfc_stats_bitmap(struct mlx4_dev *dev, int mlx4_en_netdev_event(struct notifier_block *this, unsigned long event, void *ptr); +struct xdp_md; +int mlx4_en_xdp_rx_timestamp(const struct xdp_md *ctx, u64 *timestamp); +int mlx4_en_xdp_rx_hash(const struct xdp_md *ctx, u32 *hash); + /* * Functions for time stamping */ u64 mlx4_en_get_cqe_ts(struct mlx4_cqe *cqe); +u64 mlx4_en_get_hwtstamp(struct mlx4_en_dev *mdev, u64 timestamp); void mlx4_en_fill_hwtstamps(struct mlx4_en_dev *mdev, struct skb_shared_hwtstamps *hwts, u64 timestamp);