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From: "Ananyev, Konstantin" <konstantin.ananyev@intel.com>
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Thread-Topic: [PATCH v5 1/3] ethdev: support API to set max LRO packet size
Thread-Index: AQHVllPQujwU493i4ECQgVknOV62maeFCHeg
Date: Sun, 10 Nov 2019 23:07:39 +0000
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Subject: Re: [dpdk-dev] [PATCH v5 1/3] ethdev: support API to set max LRO
packet size
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> This patch implements [1], to support API for configuration and
> validation of max size for LRO aggregated packet.
> API change notice [2] is removed, and release notes for 19.11
> are updated accordingly.
>=20
> Various PMDs using LRO offload are updated, the new data members are
> initialized to ensure they don't fail validation.
>=20
> [1] http://patches.dpdk.org/patch/58217/
> [2] http://patches.dpdk.org/patch/57492/
Actually if the requirement is just to allow user to limit max lro size,
then why not to add just new function for that:
int rte_eth_dev_set_max_lro(uint16_t port_id, uint32_t lro);
?
And make it optional for the drivers to support it.
That way PMD/devices that allow LRO max size to be configurable,
can support it others can fail.
=20
Konstantin
>=20
> Signed-off-by: Dekel Peled <dekelp@mellanox.com>
> Reviewed-by: Andrew Rybchenko <arybchenko@solarflare.com>
> Acked-by: Thomas Monjalon <thomas@monjalon.net>
> Acked-by: Matan Azrad <matan@mellanox.com>
> ---
> doc/guides/nics/features.rst | 2 ++
> doc/guides/rel_notes/deprecation.rst | 4 ----
> doc/guides/rel_notes/release_19_11.rst | 8 +++++++
> drivers/net/bnxt/bnxt_ethdev.c | 1 +
> drivers/net/hinic/hinic_pmd_ethdev.c | 1 +
> drivers/net/ixgbe/ixgbe_ethdev.c | 1 +
> drivers/net/mlx5/mlx5.h | 3 +++
> drivers/net/mlx5/mlx5_ethdev.c | 1 +
> drivers/net/mlx5/mlx5_rxq.c | 1 -
> drivers/net/qede/qede_ethdev.c | 1 +
> drivers/net/virtio/virtio_ethdev.c | 1 +
> drivers/net/vmxnet3/vmxnet3_ethdev.c | 1 +
> lib/librte_ethdev/rte_ethdev.c | 44 ++++++++++++++++++++++++++++=
++++++
> lib/librte_ethdev/rte_ethdev.h | 4 ++++
> 14 files changed, 68 insertions(+), 5 deletions(-)
>=20
> diff --git a/doc/guides/nics/features.rst b/doc/guides/nics/features.rst
> index 7a31cf7..2138ce3 100644
> --- a/doc/guides/nics/features.rst
> +++ b/doc/guides/nics/features.rst
> @@ -193,10 +193,12 @@ LRO
> Supports Large Receive Offload.
>=20
> * **[uses] rte_eth_rxconf,rte_eth_rxmode**: ``offloads:DEV_RX_OFFL=
OAD_TCP_LRO``.
> + ``dev_conf.rxmode.max_lro_pkt_size``.
> * **[implements] datapath**: ``LRO functionality``.
> * **[implements] rte_eth_dev_data**: ``lro``.
> * **[provides] mbuf**: ``mbuf.ol_flags:PKT_RX_LRO``, ``mbuf.tso_segsz`=
`.
> * **[provides] rte_eth_dev_info**: ``rx_offload_capa,rx_queue_offload_=
capa:DEV_RX_OFFLOAD_TCP_LRO``.
> +* **[provides] rte_eth_dev_info**: ``max_lro_pkt_size``.
>=20
>=20
> .. _nic_features_tso:
> diff --git a/doc/guides/rel_notes/deprecation.rst b/doc/guides/rel_notes/=
deprecation.rst
> index c10dc30..fdec33d 100644
> --- a/doc/guides/rel_notes/deprecation.rst
> +++ b/doc/guides/rel_notes/deprecation.rst
> @@ -87,10 +87,6 @@ Deprecation Notices
> This scheme will allow PMDs to avoid lookup to internal ptype table on=
Rx and
> thereby improve Rx performance if application wishes do so.
>=20
> -* ethdev: New 32-bit fields may be added for maximum LRO session size, i=
n
> - struct ``rte_eth_dev_info`` for the port capability and in struct
> - ``rte_eth_rxmode`` for the port configuration.
> -
> * cryptodev: support for using IV with all sizes is added, J0 still can
> be used but only when IV length in following structs ``rte_crypto_auth=
_xform``,
> ``rte_crypto_aead_xform`` is set to zero. When IV length is greater or=
equal
> diff --git a/doc/guides/rel_notes/release_19_11.rst b/doc/guides/rel_note=
s/release_19_11.rst
> index 87b7bd0..a3fc023 100644
> --- a/doc/guides/rel_notes/release_19_11.rst
> +++ b/doc/guides/rel_notes/release_19_11.rst
> @@ -418,6 +418,14 @@ ABI Changes
> align the Ethernet header on receive and all known encapsulations
> preserve the alignment of the header.
>=20
> +* ethdev: Added 32-bit fields for maximum LRO aggregated packet size, in
> + struct ``rte_eth_dev_info`` for the port capability and in struct
> + ``rte_eth_rxmode`` for the port configuration.
> + Application should use the new field in struct ``rte_eth_rxmode`` to c=
onfigure
> + the requested size.
That part I am not happy with: * application should use*.
Many apps I suppose are ok with default LRO size selected by PMD/HW.
Why to force changes in all of them?
> + PMD should use the new field in struct ``rte_eth_dev_info`` to report =
the
> + supported port capability.
> +
>=20
> Shared Library Versions
> -----------------------
> diff --git a/drivers/net/bnxt/bnxt_ethdev.c b/drivers/net/bnxt/bnxt_ethde=
v.c
> index b9b055e..741b897 100644
> --- a/drivers/net/bnxt/bnxt_ethdev.c
> +++ b/drivers/net/bnxt/bnxt_ethdev.c
> @@ -519,6 +519,7 @@ static int bnxt_dev_info_get_op(struct rte_eth_dev *e=
th_dev,
> /* Fast path specifics */
> dev_info->min_rx_bufsize =3D 1;
> dev_info->max_rx_pktlen =3D BNXT_MAX_PKT_LEN;
> + dev_info->max_lro_pkt_size =3D BNXT_MAX_PKT_LEN;
>=20
> dev_info->rx_offload_capa =3D BNXT_DEV_RX_OFFLOAD_SUPPORT;
> if (bp->flags & BNXT_FLAG_PTP_SUPPORTED)
> diff --git a/drivers/net/hinic/hinic_pmd_ethdev.c b/drivers/net/hinic/hin=
ic_pmd_ethdev.c
> index 9f37a40..b33b2cf 100644
> --- a/drivers/net/hinic/hinic_pmd_ethdev.c
> +++ b/drivers/net/hinic/hinic_pmd_ethdev.c
> @@ -727,6 +727,7 @@ static void hinic_get_speed_capa(struct rte_eth_dev *=
dev, uint32_t *speed_capa)
> info->max_tx_queues =3D nic_dev->nic_cap.max_sqs;
> info->min_rx_bufsize =3D HINIC_MIN_RX_BUF_SIZE;
> info->max_rx_pktlen =3D HINIC_MAX_JUMBO_FRAME_SIZE;
> + info->max_lro_pkt_size =3D HINIC_MAX_JUMBO_FRAME_SIZE;
> info->max_mac_addrs =3D HINIC_MAX_UC_MAC_ADDRS;
> info->min_mtu =3D HINIC_MIN_MTU_SIZE;
> info->max_mtu =3D HINIC_MAX_MTU_SIZE;
> diff --git a/drivers/net/ixgbe/ixgbe_ethdev.c b/drivers/net/ixgbe/ixgbe_e=
thdev.c
> index 30c0379..5719552 100644
> --- a/drivers/net/ixgbe/ixgbe_ethdev.c
> +++ b/drivers/net/ixgbe/ixgbe_ethdev.c
> @@ -3814,6 +3814,7 @@ static int ixgbevf_dev_xstats_get_names(__rte_unuse=
d struct rte_eth_dev *dev,
> }
> dev_info->min_rx_bufsize =3D 1024; /* cf BSIZEPACKET in SRRCTL register=
*/
> dev_info->max_rx_pktlen =3D 15872; /* includes CRC, cf MAXFRS register =
*/
> + dev_info->max_lro_pkt_size =3D RTE_IPV4_MAX_PKT_LEN;
> dev_info->max_mac_addrs =3D hw->mac.num_rar_entries;
> dev_info->max_hash_mac_addrs =3D IXGBE_VMDQ_NUM_UC_MAC;
> dev_info->max_vfs =3D pci_dev->max_vfs;
> diff --git a/drivers/net/mlx5/mlx5.h b/drivers/net/mlx5/mlx5.h
> index fab58c9..4783b5c 100644
> --- a/drivers/net/mlx5/mlx5.h
> +++ b/drivers/net/mlx5/mlx5.h
> @@ -206,6 +206,9 @@ struct mlx5_hca_attr {
> #define MLX5_LRO_SUPPORTED(dev) \
> (((struct mlx5_priv *)((dev)->data->dev_private))->config.lro.supported=
)
>=20
> +/* Maximal size of aggregated LRO packet. */
> +#define MLX5_MAX_LRO_SIZE (UINT8_MAX * 256u)
> +
> /* LRO configurations structure. */
> struct mlx5_lro_config {
> uint32_t supported:1; /* Whether LRO is supported. */
> diff --git a/drivers/net/mlx5/mlx5_ethdev.c b/drivers/net/mlx5/mlx5_ethde=
v.c
> index 2b7c867..3adc824 100644
> --- a/drivers/net/mlx5/mlx5_ethdev.c
> +++ b/drivers/net/mlx5/mlx5_ethdev.c
> @@ -606,6 +606,7 @@ struct ethtool_link_settings {
> /* FIXME: we should ask the device for these values. */
> info->min_rx_bufsize =3D 32;
> info->max_rx_pktlen =3D 65536;
> + info->max_lro_pkt_size =3D MLX5_MAX_LRO_SIZE;
> /*
> * Since we need one CQ per QP, the limit is the minimum number
> * between the two values.
> diff --git a/drivers/net/mlx5/mlx5_rxq.c b/drivers/net/mlx5/mlx5_rxq.c
> index 24d0eaa..9423e7b 100644
> --- a/drivers/net/mlx5/mlx5_rxq.c
> +++ b/drivers/net/mlx5/mlx5_rxq.c
> @@ -1701,7 +1701,6 @@ struct mlx5_rxq_obj *
> return 0;
> }
>=20
> -#define MLX5_MAX_LRO_SIZE (UINT8_MAX * 256u)
> #define MLX5_MAX_TCP_HDR_OFFSET ((unsigned int)(sizeof(struct rte_ether_=
hdr) + \
> sizeof(struct rte_vlan_hdr) * 2 + \
> sizeof(struct rte_ipv6_hdr)))
> diff --git a/drivers/net/qede/qede_ethdev.c b/drivers/net/qede/qede_ethde=
v.c
> index 575982f..ccbb8a4 100644
> --- a/drivers/net/qede/qede_ethdev.c
> +++ b/drivers/net/qede/qede_ethdev.c
> @@ -1277,6 +1277,7 @@ static int qede_dev_configure(struct rte_eth_dev *e=
th_dev)
>=20
> dev_info->min_rx_bufsize =3D (uint32_t)QEDE_MIN_RX_BUFF_SIZE;
> dev_info->max_rx_pktlen =3D (uint32_t)ETH_TX_MAX_NON_LSO_PKT_LEN;
> + dev_info->max_lro_pkt_size =3D (uint32_t)0x7FFF;
> dev_info->rx_desc_lim =3D qede_rx_desc_lim;
> dev_info->tx_desc_lim =3D qede_tx_desc_lim;
>=20
> diff --git a/drivers/net/virtio/virtio_ethdev.c b/drivers/net/virtio/virt=
io_ethdev.c
> index 044eb10..22ce5a2 100644
> --- a/drivers/net/virtio/virtio_ethdev.c
> +++ b/drivers/net/virtio/virtio_ethdev.c
> @@ -2435,6 +2435,7 @@ static void virtio_dev_free_mbufs(struct rte_eth_de=
v *dev)
> RTE_MIN(hw->max_queue_pairs, VIRTIO_MAX_TX_QUEUES);
> dev_info->min_rx_bufsize =3D VIRTIO_MIN_RX_BUFSIZE;
> dev_info->max_rx_pktlen =3D VIRTIO_MAX_RX_PKTLEN;
> + dev_info->max_lro_pkt_size =3D VIRTIO_MAX_RX_PKTLEN;
> dev_info->max_mac_addrs =3D VIRTIO_MAX_MAC_ADDRS;
>=20
> host_features =3D VTPCI_OPS(hw)->get_features(hw);
> diff --git a/drivers/net/vmxnet3/vmxnet3_ethdev.c b/drivers/net/vmxnet3/v=
mxnet3_ethdev.c
> index d1faeaa..d18e8bc 100644
> --- a/drivers/net/vmxnet3/vmxnet3_ethdev.c
> +++ b/drivers/net/vmxnet3/vmxnet3_ethdev.c
> @@ -1161,6 +1161,7 @@ static int eth_vmxnet3_pci_remove(struct rte_pci_de=
vice *pci_dev)
> dev_info->max_tx_queues =3D VMXNET3_MAX_TX_QUEUES;
> dev_info->min_rx_bufsize =3D 1518 + RTE_PKTMBUF_HEADROOM;
> dev_info->max_rx_pktlen =3D 16384; /* includes CRC, cf MAXFRS register =
*/
> + dev_info->max_lro_pkt_size =3D 16384;
> dev_info->speed_capa =3D ETH_LINK_SPEED_10G;
> dev_info->max_mac_addrs =3D VMXNET3_MAX_MAC_ADDRS;
>=20
> diff --git a/lib/librte_ethdev/rte_ethdev.c b/lib/librte_ethdev/rte_ethde=
v.c
> index 652c369..c642ba5 100644
> --- a/lib/librte_ethdev/rte_ethdev.c
> +++ b/lib/librte_ethdev/rte_ethdev.c
> @@ -1136,6 +1136,26 @@ struct rte_eth_dev *
> return name;
> }
>=20
> +static inline int
> +check_lro_pkt_size(uint16_t port_id, uint32_t config_size,
> + uint32_t dev_info_size)
> +{
> + int ret =3D 0;
> +
> + if (config_size > dev_info_size) {
> + RTE_ETHDEV_LOG(ERR, "Ethdev port_id=3D%d max_lro_pkt_size %u "
> + "> max allowed value %u\n", port_id, config_size,
> + dev_info_size);
> + ret =3D -EINVAL;
> + } else if (config_size < RTE_ETHER_MIN_LEN) {
> + RTE_ETHDEV_LOG(ERR, "Ethdev port_id=3D%d max_lro_pkt_size %u "
> + "< min allowed value %u\n", port_id, config_size,
> + (unsigned int)RTE_ETHER_MIN_LEN);
> + ret =3D -EINVAL;
> + }
> + return ret;
> +}
> +
> int
> rte_eth_dev_configure(uint16_t port_id, uint16_t nb_rx_q, uint16_t nb_tx=
_q,
> const struct rte_eth_conf *dev_conf)
> @@ -1266,6 +1286,18 @@ struct rte_eth_dev *
> RTE_ETHER_MAX_LEN;
> }
>=20
> + /*
> + * If LRO is enabled, check that the maximum aggregated packet
> + * size is supported by the configured device.
> + */
> + if (dev_conf->rxmode.offloads & DEV_RX_OFFLOAD_TCP_LRO) {
> + ret =3D check_lro_pkt_size(
> + port_id, dev_conf->rxmode.max_lro_pkt_size,
> + dev_info.max_lro_pkt_size);
> + if (ret !=3D 0)
> + goto rollback;
> + }
> +
> /* Any requested offloading must be within its device capabilities */
> if ((dev_conf->rxmode.offloads & dev_info.rx_offload_capa) !=3D
> dev_conf->rxmode.offloads) {
> @@ -1770,6 +1802,18 @@ struct rte_eth_dev *
> return -EINVAL;
> }
>=20
> + /*
> + * If LRO is enabled, check that the maximum aggregated packet
> + * size is supported by the configured device.
> + */
> + if (local_conf.offloads & DEV_RX_OFFLOAD_TCP_LRO) {
> + int ret =3D check_lro_pkt_size(port_id,
> + dev->data->dev_conf.rxmode.max_lro_pkt_size,
> + dev_info.max_lro_pkt_size);
> + if (ret !=3D 0)
> + return ret;
> + }
> +
> ret =3D (*dev->dev_ops->rx_queue_setup)(dev, rx_queue_id, nb_rx_desc,
> socket_id, &local_conf, mp);
> if (!ret) {
> diff --git a/lib/librte_ethdev/rte_ethdev.h b/lib/librte_ethdev/rte_ethde=
v.h
> index 44d77b3..1b76df5 100644
> --- a/lib/librte_ethdev/rte_ethdev.h
> +++ b/lib/librte_ethdev/rte_ethdev.h
> @@ -395,6 +395,8 @@ struct rte_eth_rxmode {
> /** The multi-queue packet distribution mode to be used, e.g. RSS. */
> enum rte_eth_rx_mq_mode mq_mode;
> uint32_t max_rx_pkt_len; /**< Only used if JUMBO_FRAME enabled. */
> + /** Maximum allowed size of LRO aggregated packet. */
> + uint32_t max_lro_pkt_size;
> uint16_t split_hdr_size; /**< hdr buf size (header_split enabled).*/
> /**
> * Per-port Rx offloads to be set using DEV_RX_OFFLOAD_* flags.
> @@ -1218,6 +1220,8 @@ struct rte_eth_dev_info {
> const uint32_t *dev_flags; /**< Device flags */
> uint32_t min_rx_bufsize; /**< Minimum size of RX buffer. */
> uint32_t max_rx_pktlen; /**< Maximum configurable length of RX pkt. */
> + /** Maximum configurable size of LRO aggregated packet. */
> + uint32_t max_lro_pkt_size;
> uint16_t max_rx_queues; /**< Maximum number of RX queues. */
> uint16_t max_tx_queues; /**< Maximum number of TX queues. */
> uint32_t max_mac_addrs; /**< Maximum number of MAC addresses. */
> --
> 1.8.3.1