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Message-ID: <20221129193452.3448944-8-sdf@google.com>
Date: Tue, 29 Nov 2022 11:34:48 -0800
From: Stanislav Fomichev <sdf@...gle.com>
To: bpf@...r.kernel.org
Cc: ast@...nel.org, daniel@...earbox.net, andrii@...nel.org,
martin.lau@...ux.dev, song@...nel.org, yhs@...com,
john.fastabend@...il.com, kpsingh@...nel.org, sdf@...gle.com,
haoluo@...gle.com, jolsa@...nel.org,
Tariq Toukan <tariqt@...dia.com>,
David Ahern <dsahern@...il.com>,
Jakub Kicinski <kuba@...nel.org>,
Willem de Bruijn <willemb@...gle.com>,
Jesper Dangaard Brouer <brouer@...hat.com>,
Anatoly Burakov <anatoly.burakov@...el.com>,
Alexander Lobakin <alexandr.lobakin@...el.com>,
Magnus Karlsson <magnus.karlsson@...il.com>,
Maryam Tahhan <mtahhan@...hat.com>, xdp-hints@...-project.net,
netdev@...r.kernel.org
Subject: [PATCH bpf-next v3 07/11] mxl4: 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: Tariq Toukan <tariqt@...dia.com>
Cc: John Fastabend <john.fastabend@...il.com>
Cc: David Ahern <dsahern@...il.com>
Cc: Martin KaFai Lau <martin.lau@...ux.dev>
Cc: Jakub Kicinski <kuba@...nel.org>
Cc: Willem de Bruijn <willemb@...gle.com>
Cc: Jesper Dangaard Brouer <brouer@...hat.com>
Cc: Anatoly Burakov <anatoly.burakov@...el.com>
Cc: Alexander Lobakin <alexandr.lobakin@...el.com>
Cc: Magnus Karlsson <magnus.karlsson@...il.com>
Cc: Maryam Tahhan <mtahhan@...hat.com>
Cc: xdp-hints@...-project.net
Cc: netdev@...r.kernel.org
Signed-off-by: Stanislav Fomichev <sdf@...gle.com>
---
drivers/net/ethernet/mellanox/mlx4/en_clock.c | 13 +++++--
.../net/ethernet/mellanox/mlx4/en_netdev.c | 10 +++++
drivers/net/ethernet/mellanox/mlx4/en_rx.c | 38 ++++++++++++++++++-
drivers/net/ethernet/mellanox/mlx4/mlx4_en.h | 1 +
include/linux/mlx4/device.h | 7 ++++
5 files changed, 64 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..1cb63746a851 100644
--- a/drivers/net/ethernet/mellanox/mlx4/en_netdev.c
+++ b/drivers/net/ethernet/mellanox/mlx4/en_netdev.c
@@ -2855,6 +2855,11 @@ static const struct net_device_ops mlx4_netdev_ops = {
.ndo_features_check = mlx4_en_features_check,
.ndo_set_tx_maxrate = mlx4_en_set_tx_maxrate,
.ndo_bpf = mlx4_xdp,
+
+ .ndo_xdp_rx_timestamp_supported = mlx4_xdp_rx_timestamp_supported,
+ .ndo_xdp_rx_timestamp = mlx4_xdp_rx_timestamp,
+ .ndo_xdp_rx_hash_supported = mlx4_xdp_rx_hash_supported,
+ .ndo_xdp_rx_hash = mlx4_xdp_rx_hash,
};
static const struct net_device_ops mlx4_netdev_ops_master = {
@@ -2887,6 +2892,11 @@ static const struct net_device_ops mlx4_netdev_ops_master = {
.ndo_features_check = mlx4_en_features_check,
.ndo_set_tx_maxrate = mlx4_en_set_tx_maxrate,
.ndo_bpf = mlx4_xdp,
+
+ .ndo_xdp_rx_timestamp_supported = mlx4_xdp_rx_timestamp_supported,
+ .ndo_xdp_rx_timestamp = mlx4_xdp_rx_timestamp,
+ .ndo_xdp_rx_hash_supported = mlx4_xdp_rx_hash_supported,
+ .ndo_xdp_rx_hash = mlx4_xdp_rx_hash,
};
struct mlx4_en_bond {
diff --git a/drivers/net/ethernet/mellanox/mlx4/en_rx.c b/drivers/net/ethernet/mellanox/mlx4/en_rx.c
index 9c114fc723e3..1b8e1b2d8729 100644
--- a/drivers/net/ethernet/mellanox/mlx4/en_rx.c
+++ b/drivers/net/ethernet/mellanox/mlx4/en_rx.c
@@ -663,8 +663,40 @@ static int check_csum(struct mlx4_cqe *cqe, struct sk_buff *skb, void *va,
struct mlx4_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;
};
+bool mlx4_xdp_rx_timestamp_supported(const struct xdp_md *ctx)
+{
+ struct mlx4_xdp_buff *_ctx = (void *)ctx;
+
+ return _ctx->ring->hwtstamp_rx_filter == HWTSTAMP_FILTER_ALL;
+}
+
+u64 mlx4_xdp_rx_timestamp(const struct xdp_md *ctx)
+{
+ struct mlx4_xdp_buff *_ctx = (void *)ctx;
+
+ return mlx4_en_get_hwtstamp(_ctx->mdev, mlx4_en_get_cqe_ts(_ctx->cqe));
+}
+
+bool mlx4_xdp_rx_hash_supported(const struct xdp_md *ctx)
+{
+ struct mlx4_xdp_buff *_ctx = (void *)ctx;
+
+ return _ctx->dev->features & NETIF_F_RXHASH;
+}
+
+u32 mlx4_xdp_rx_hash(const struct xdp_md *ctx)
+{
+ struct mlx4_xdp_buff *_ctx = (void *)ctx;
+
+ return be32_to_cpu(_ctx->cqe->immed_rss_invalid);
+}
+
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 +813,12 @@ 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 e132ff4c82f2..b7c0d4899ad7 100644
--- a/drivers/net/ethernet/mellanox/mlx4/mlx4_en.h
+++ b/drivers/net/ethernet/mellanox/mlx4/mlx4_en.h
@@ -792,6 +792,7 @@ int mlx4_en_netdev_event(struct notifier_block *this,
* 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);
diff --git a/include/linux/mlx4/device.h b/include/linux/mlx4/device.h
index 6646634a0b9d..d5904da1d490 100644
--- a/include/linux/mlx4/device.h
+++ b/include/linux/mlx4/device.h
@@ -1585,4 +1585,11 @@ static inline int mlx4_get_num_reserved_uar(struct mlx4_dev *dev)
/* The first 128 UARs are used for EQ doorbells */
return (128 >> (PAGE_SHIFT - dev->uar_page_shift));
}
+
+struct xdp_md;
+bool mlx4_xdp_rx_timestamp_supported(const struct xdp_md *ctx);
+u64 mlx4_xdp_rx_timestamp(const struct xdp_md *ctx);
+bool mlx4_xdp_rx_hash_supported(const struct xdp_md *ctx);
+u32 mlx4_xdp_rx_hash(const struct xdp_md *ctx);
+
#endif /* MLX4_DEVICE_H */
--
2.38.1.584.g0f3c55d4c2-goog
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