> -----Original Message-----
> From: Intel-wired-lan <[email protected]> On Behalf
> Of Kohei Enju
> Sent: Thursday, March 19, 2026 6:17 PM
> To: [email protected]; [email protected]
> Cc: Nguyen, Anthony L <[email protected]>; Kitszel,
> Przemyslaw <[email protected]>; Andrew Lunn
> <[email protected]>; David S. Miller <[email protected]>; Eric
> Dumazet <[email protected]>; Jakub Kicinski <[email protected]>; Paolo
> Abeni <[email protected]>; [email protected]; Kohei Enju
> <[email protected]>
> Subject: [Intel-wired-lan] [PATCH iwl-next v1 2/3] i40e: add support
> for bpf_xdp_metadata_rx_hash()
>
> Introduce i40e_xdp_rx_hash() which takes the same approach as
> i40e_rx_hash() to extract the hash from RX descriptors.
>
> Tested with X710 adapter using xdp_hw_metadata, and verified hash
> consistency between bpf_xdp_metadata_rx_hash() and skb->hash.
>
> Signed-off-by: Kohei Enju <[email protected]>
> ---
> drivers/net/ethernet/intel/i40e/i40e_main.c | 30
> +++++++++++++++++++++ drivers/net/ethernet/intel/i40e/i40e_type.h |
> 5 ++++
> 2 files changed, 35 insertions(+)
>
> diff --git a/drivers/net/ethernet/intel/i40e/i40e_main.c
> b/drivers/net/ethernet/intel/i40e/i40e_main.c
> index 7966d9cb8009..6b7e34b16a8d 100644
> --- a/drivers/net/ethernet/intel/i40e/i40e_main.c
> +++ b/drivers/net/ethernet/intel/i40e/i40e_main.c
> @@ -4,6 +4,7 @@
> #include <generated/utsrelease.h>
> #include <linux/crash_dump.h>
> #include <linux/intel/libie/pctype.h>
> +#include <linux/intel/libie/rx.h>
> #include <linux/if_bridge.h>
> #include <linux/if_macvlan.h>
> #include <linux/module.h>
> @@ -13585,6 +13586,34 @@ static int i40e_xdp(struct net_device *dev,
> }
> }
>
> +static int i40e_xdp_rx_hash(const struct xdp_md *_ctx, u32 *hash,
> + enum xdp_rss_hash_type *rss_type) {
> + const struct i40e_xdp_buff *ctx = (const void *)_ctx;
> + const union i40e_rx_desc *desc = ctx->desc;
> + struct libeth_rx_pt rx_ptype;
> + u8 raw_rx_ptype;
> + u64 status;
> +
> + status = le64_to_cpu(desc->wb.qword1.status_error_len);
> + raw_rx_ptype = FIELD_GET(I40E_RXD_QW1_PTYPE_MASK, status);
> + rx_ptype = libie_rx_pt_parse(raw_rx_ptype);
> +
> + if (!libeth_rx_pt_has_hash(ctx->xdp.rxq->dev, rx_ptype) ||
> + FIELD_GET(I40E_RX_DESC_STATUS_FLTSTAT_MASK, status) !=
> + I40E_RX_DESC_FLTSTAT_RSS_HASH)
> + return -ENODATA;
> +
> + *hash = le32_to_cpu(desc->wb.qword0.hi_dword.rss);
> + *rss_type = rx_ptype.hash_type;
> +
> + return 0;
> +}
> +
> +static const struct xdp_metadata_ops i40e_xdp_metadata_ops = {
> + .xmo_rx_hash = i40e_xdp_rx_hash,
> +};
> +
> static const struct net_device_ops i40e_netdev_ops = {
> .ndo_open = i40e_open,
> .ndo_stop = i40e_close,
> @@ -13788,6 +13817,7 @@ static int i40e_config_netdev(struct i40e_vsi
> *vsi)
> i40e_vsi_config_netdev_tc(vsi, vsi->tc_config.enabled_tc);
>
> netdev->netdev_ops = &i40e_netdev_ops;
> + netdev->xdp_metadata_ops = &i40e_xdp_metadata_ops;
> netdev->watchdog_timeo = 5 * HZ;
> i40e_set_ethtool_ops(netdev);
>
> diff --git a/drivers/net/ethernet/intel/i40e/i40e_type.h
> b/drivers/net/ethernet/intel/i40e/i40e_type.h
> index ed8bbdb586da..16a65c6e5153 100644
> --- a/drivers/net/ethernet/intel/i40e/i40e_type.h
> +++ b/drivers/net/ethernet/intel/i40e/i40e_type.h
> @@ -4,6 +4,7 @@
> #ifndef _I40E_TYPE_H_
> #define _I40E_TYPE_H_
>
> +#include <linux/bits.h>
> #include <uapi/linux/if_ether.h>
> #include "i40e_adminq.h"
> #include "i40e_hmc.h"
> @@ -699,6 +700,10 @@ enum i40e_rx_desc_status_bits {
> I40E_RX_DESC_STATUS_LAST /* this entry must be last!!! */ };
>
> +#define I40E_RX_DESC_STATUS_FLTSTAT_MASK \
> + GENMASK_ULL(I40E_RX_DESC_STATUS_FLTSTAT_SHIFT + 1, \
> + I40E_RX_DESC_STATUS_FLTSTAT_SHIFT)
> +
> #define I40E_RXD_QW1_STATUS_SHIFT 0
> #define I40E_RXD_QW1_STATUS_MASK ((BIT(I40E_RX_DESC_STATUS_LAST) - 1)
> \
> << I40E_RXD_QW1_STATUS_SHIFT)
> --
> 2.51.0
Reviewed-by: Aleksandr Loktionov <[email protected]>
