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Date: Thu, 1 Feb 2024 15:22:57 +0100
From: Marcin Szycik <marcin.szycik@...ux.intel.com>
To: Takeru Hayasaka <hayatake396@...il.com>,
Jesse Brandeburg <jesse.brandeburg@...el.com>,
Tony Nguyen <anthony.l.nguyen@...el.com>,
"David S. Miller" <davem@...emloft.net>, Eric Dumazet <edumazet@...gle.com>,
Jakub Kicinski <kuba@...nel.org>, Paolo Abeni <pabeni@...hat.com>,
Jonathan Corbet <corbet@....net>
Cc: linux-doc@...r.kernel.org, vladimir.oltean@....com,
linux-kernel@...r.kernel.org, laforge@...monks.org,
intel-wired-lan@...ts.osuosl.org, netdev@...r.kernel.org,
mailhol.vincent@...adoo.fr
Subject: Re: [Intel-wired-lan] [PATCH net-next v7 2/2] ice: Implement RSS
settings for GTP using ethtool
On 01.02.2024 04:33, Takeru Hayasaka wrote:
> Following the addition of new GTP RSS hash options to ethtool.h, this patch
> implements the corresponding RSS settings for GTP packets in the Intel ice
> driver. It enables users to configure RSS for GTP-U and GTP-C traffic over IPv4
> and IPv6, utilizing the newly defined hash options.
>
> The implementation covers the handling of gtpu(4|6), gtpc(4|6), gtpc(4|6)t,
> gtpu(4|6)e, gtpu(4|6)u, and gtpu(4|6)d traffic, providing enhanced load
> distribution for GTP traffic across multiple processing units.
Reviewed-by: Marcin Szycik <marcin.szycik@...ux.intel.com>
> Signed-off-by: Takeru Hayasaka <hayatake396@...il.com>
> ---
> .../device_drivers/ethernet/intel/ice.rst | 21 ++++-
> drivers/net/ethernet/intel/ice/ice_ethtool.c | 82 +++++++++++++++++++
> drivers/net/ethernet/intel/ice/ice_flow.h | 31 +++++--
> drivers/net/ethernet/intel/ice/ice_lib.c | 37 +++++++++
> 4 files changed, 162 insertions(+), 9 deletions(-)
>
> diff --git a/Documentation/networking/device_drivers/ethernet/intel/ice.rst b/Documentation/networking/device_drivers/ethernet/intel/ice.rst
> index 5038e54586af..934752f675ba 100644
> --- a/Documentation/networking/device_drivers/ethernet/intel/ice.rst
> +++ b/Documentation/networking/device_drivers/ethernet/intel/ice.rst
> @@ -368,15 +368,28 @@ more options for Receive Side Scaling (RSS) hash byte configuration.
> # ethtool -N <ethX> rx-flow-hash <type> <option>
>
> Where <type> is:
> - tcp4 signifying TCP over IPv4
> - udp4 signifying UDP over IPv4
> - tcp6 signifying TCP over IPv6
> - udp6 signifying UDP over IPv6
> + tcp4 signifying TCP over IPv4
> + udp4 signifying UDP over IPv4
> + gtpc4 signifying GTP-C over IPv4
> + gtpc4t signifying GTP-C (include TEID) over IPv4
> + gtpu4 signifying GTP-U over IPV4
> + gtpu4e signifying GTP-U and Extension Header over IPV4
> + gtpu4u signifying GTP-U PSC Uplink over IPV4
> + gtpu4d signifying GTP-U PSC Downlink over IPV4
> + tcp6 signifying TCP over IPv6
> + udp6 signifying UDP over IPv6
> + gtpc6 signifying GTP-C over IPv6
> + gtpc6t signifying GTP-C (include TEID) over IPv6
> + gtpu6 signifying GTP-U over IPV6
> + gtpu6e signifying GTP-U and Extension Header over IPV6
> + gtpu6u signifying GTP-U PSC Uplink over IPV6
> + gtpu6d signifying GTP-U PSC Downlink over IPV6
> And <option> is one or more of:
> s Hash on the IP source address of the Rx packet.
> d Hash on the IP destination address of the Rx packet.
> f Hash on bytes 0 and 1 of the Layer 4 header of the Rx packet.
> n Hash on bytes 2 and 3 of the Layer 4 header of the Rx packet.
> + e Hash on GTP Packet on TEID (4bytes) of the Rx packet.
>
>
> Accelerated Receive Flow Steering (aRFS)
> diff --git a/drivers/net/ethernet/intel/ice/ice_ethtool.c b/drivers/net/ethernet/intel/ice/ice_ethtool.c
> index a19b06f18e40..d0e05032f464 100644
> --- a/drivers/net/ethernet/intel/ice/ice_ethtool.c
> +++ b/drivers/net/ethernet/intel/ice/ice_ethtool.c
> @@ -2486,6 +2486,24 @@ static u32 ice_parse_hdrs(struct ethtool_rxnfc *nfc)
> case SCTP_V4_FLOW:
> hdrs |= ICE_FLOW_SEG_HDR_SCTP | ICE_FLOW_SEG_HDR_IPV4;
> break;
> + case GTPU_V4_FLOW:
> + hdrs |= ICE_FLOW_SEG_HDR_GTPU_IP | ICE_FLOW_SEG_HDR_IPV4;
> + break;
> + case GTPC_V4_FLOW:
> + hdrs |= ICE_FLOW_SEG_HDR_GTPC | ICE_FLOW_SEG_HDR_IPV4;
> + break;
> + case GTPC_TEID_V4_FLOW:
> + hdrs |= ICE_FLOW_SEG_HDR_GTPC_TEID | ICE_FLOW_SEG_HDR_IPV4;
> + break;
> + case GTPU_EH_V4_FLOW:
> + hdrs |= ICE_FLOW_SEG_HDR_GTPU_EH | ICE_FLOW_SEG_HDR_IPV4;
> + break;
> + case GTPU_UL_V4_FLOW:
> + hdrs |= ICE_FLOW_SEG_HDR_GTPU_UP | ICE_FLOW_SEG_HDR_IPV4;
> + break;
> + case GTPU_DL_V4_FLOW:
> + hdrs |= ICE_FLOW_SEG_HDR_GTPU_DWN | ICE_FLOW_SEG_HDR_IPV4;
> + break;
> case TCP_V6_FLOW:
> hdrs |= ICE_FLOW_SEG_HDR_TCP | ICE_FLOW_SEG_HDR_IPV6;
> break;
> @@ -2495,6 +2513,24 @@ static u32 ice_parse_hdrs(struct ethtool_rxnfc *nfc)
> case SCTP_V6_FLOW:
> hdrs |= ICE_FLOW_SEG_HDR_SCTP | ICE_FLOW_SEG_HDR_IPV6;
> break;
> + case GTPU_V6_FLOW:
> + hdrs |= ICE_FLOW_SEG_HDR_GTPU_IP | ICE_FLOW_SEG_HDR_IPV6;
> + break;
> + case GTPC_V6_FLOW:
> + hdrs |= ICE_FLOW_SEG_HDR_GTPC | ICE_FLOW_SEG_HDR_IPV6;
> + break;
> + case GTPC_TEID_V6_FLOW:
> + hdrs |= ICE_FLOW_SEG_HDR_GTPC_TEID | ICE_FLOW_SEG_HDR_IPV6;
> + break;
> + case GTPU_EH_V6_FLOW:
> + hdrs |= ICE_FLOW_SEG_HDR_GTPU_EH | ICE_FLOW_SEG_HDR_IPV6;
> + break;
> + case GTPU_UL_V6_FLOW:
> + hdrs |= ICE_FLOW_SEG_HDR_GTPU_UP | ICE_FLOW_SEG_HDR_IPV6;
> + break;
> + case GTPU_DL_V6_FLOW:
> + hdrs |= ICE_FLOW_SEG_HDR_GTPU_DWN | ICE_FLOW_SEG_HDR_IPV6;
> + break;
> default:
> break;
> }
> @@ -2518,6 +2554,12 @@ static u64 ice_parse_hash_flds(struct ethtool_rxnfc *nfc, bool symm)
> case TCP_V4_FLOW:
> case UDP_V4_FLOW:
> case SCTP_V4_FLOW:
> + case GTPU_V4_FLOW:
> + case GTPC_V4_FLOW:
> + case GTPC_TEID_V4_FLOW:
> + case GTPU_EH_V4_FLOW:
> + case GTPU_UL_V4_FLOW:
> + case GTPU_DL_V4_FLOW:
> if (nfc->data & RXH_IP_SRC)
> hfld |= ICE_FLOW_HASH_FLD_IPV4_SA;
> if (nfc->data & RXH_IP_DST)
> @@ -2526,6 +2568,12 @@ static u64 ice_parse_hash_flds(struct ethtool_rxnfc *nfc, bool symm)
> case TCP_V6_FLOW:
> case UDP_V6_FLOW:
> case SCTP_V6_FLOW:
> + case GTPU_V6_FLOW:
> + case GTPC_V6_FLOW:
> + case GTPC_TEID_V6_FLOW:
> + case GTPU_EH_V6_FLOW:
> + case GTPU_UL_V6_FLOW:
> + case GTPU_DL_V6_FLOW:
> if (nfc->data & RXH_IP_SRC)
> hfld |= ICE_FLOW_HASH_FLD_IPV6_SA;
> if (nfc->data & RXH_IP_DST)
> @@ -2564,6 +2612,33 @@ static u64 ice_parse_hash_flds(struct ethtool_rxnfc *nfc, bool symm)
> }
> }
>
> + if (nfc->data & RXH_GTP_TEID) {
> + switch (nfc->flow_type) {
> + case GTPC_TEID_V4_FLOW:
> + case GTPC_TEID_V6_FLOW:
> + hfld |= ICE_FLOW_HASH_FLD_GTPC_TEID;
> + break;
> + case GTPU_V4_FLOW:
> + case GTPU_V6_FLOW:
> + hfld |= ICE_FLOW_HASH_FLD_GTPU_IP_TEID;
> + break;
> + case GTPU_EH_V4_FLOW:
> + case GTPU_EH_V6_FLOW:
> + hfld |= ICE_FLOW_HASH_FLD_GTPU_EH_TEID;
> + break;
> + case GTPU_UL_V4_FLOW:
> + case GTPU_UL_V6_FLOW:
> + hfld |= ICE_FLOW_HASH_FLD_GTPU_UP_TEID;
> + break;
> + case GTPU_DL_V4_FLOW:
> + case GTPU_DL_V6_FLOW:
> + hfld |= ICE_FLOW_HASH_FLD_GTPU_DWN_TEID;
> + break;
> + default:
> + break;
> + }
> + }
> +
> return hfld;
> }
>
> @@ -2676,6 +2751,13 @@ ice_get_rss_hash_opt(struct ice_vsi *vsi, struct ethtool_rxnfc *nfc)
> hash_flds & ICE_FLOW_HASH_FLD_UDP_DST_PORT ||
> hash_flds & ICE_FLOW_HASH_FLD_SCTP_DST_PORT)
> nfc->data |= (u64)RXH_L4_B_2_3;
> +
> + if (hash_flds & ICE_FLOW_HASH_FLD_GTPC_TEID ||
> + hash_flds & ICE_FLOW_HASH_FLD_GTPU_IP_TEID ||
> + hash_flds & ICE_FLOW_HASH_FLD_GTPU_EH_TEID ||
> + hash_flds & ICE_FLOW_HASH_FLD_GTPU_UP_TEID ||
> + hash_flds & ICE_FLOW_HASH_FLD_GTPU_DWN_TEID)
> + nfc->data |= (u64)RXH_GTP_TEID;
> }
>
> /**
> diff --git a/drivers/net/ethernet/intel/ice/ice_flow.h b/drivers/net/ethernet/intel/ice/ice_flow.h
> index ff82915ab497..2fd2e0cb483d 100644
> --- a/drivers/net/ethernet/intel/ice/ice_flow.h
> +++ b/drivers/net/ethernet/intel/ice/ice_flow.h
> @@ -37,13 +37,13 @@
> #define ICE_HASH_SCTP_IPV4 (ICE_FLOW_HASH_IPV4 | ICE_FLOW_HASH_SCTP_PORT)
> #define ICE_HASH_SCTP_IPV6 (ICE_FLOW_HASH_IPV6 | ICE_FLOW_HASH_SCTP_PORT)
>
> -#define ICE_FLOW_HASH_GTP_TEID \
> +#define ICE_FLOW_HASH_GTP_C_TEID \
> (BIT_ULL(ICE_FLOW_FIELD_IDX_GTPC_TEID))
>
> -#define ICE_FLOW_HASH_GTP_IPV4_TEID \
> - (ICE_FLOW_HASH_IPV4 | ICE_FLOW_HASH_GTP_TEID)
> -#define ICE_FLOW_HASH_GTP_IPV6_TEID \
> - (ICE_FLOW_HASH_IPV6 | ICE_FLOW_HASH_GTP_TEID)
> +#define ICE_FLOW_HASH_GTP_C_IPV4_TEID \
> + (ICE_FLOW_HASH_IPV4 | ICE_FLOW_HASH_GTP_C_TEID)
> +#define ICE_FLOW_HASH_GTP_C_IPV6_TEID \
> + (ICE_FLOW_HASH_IPV6 | ICE_FLOW_HASH_GTP_C_TEID)
>
> #define ICE_FLOW_HASH_GTP_U_TEID \
> (BIT_ULL(ICE_FLOW_FIELD_IDX_GTPU_IP_TEID))
> @@ -66,6 +66,20 @@
> (ICE_FLOW_HASH_IPV6 | ICE_FLOW_HASH_GTP_U_EH_TEID | \
> ICE_FLOW_HASH_GTP_U_EH_QFI)
>
> +#define ICE_FLOW_HASH_GTP_U_UP \
> + (BIT_ULL(ICE_FLOW_FIELD_IDX_GTPU_UP_TEID))
> +#define ICE_FLOW_HASH_GTP_U_DWN \
> + (BIT_ULL(ICE_FLOW_FIELD_IDX_GTPU_DWN_TEID))
> +
> +#define ICE_FLOW_HASH_GTP_U_IPV4_UP \
> + (ICE_FLOW_HASH_IPV4 | ICE_FLOW_HASH_GTP_U_UP)
> +#define ICE_FLOW_HASH_GTP_U_IPV6_UP \
> + (ICE_FLOW_HASH_IPV6 | ICE_FLOW_HASH_GTP_U_UP)
> +#define ICE_FLOW_HASH_GTP_U_IPV4_DWN \
> + (ICE_FLOW_HASH_IPV4 | ICE_FLOW_HASH_GTP_U_DWN)
> +#define ICE_FLOW_HASH_GTP_U_IPV6_DWN \
> + (ICE_FLOW_HASH_IPV6 | ICE_FLOW_HASH_GTP_U_DWN)
> +
> #define ICE_FLOW_HASH_PPPOE_SESS_ID \
> (BIT_ULL(ICE_FLOW_FIELD_IDX_PPPOE_SESS_ID))
>
> @@ -242,6 +256,13 @@ enum ice_flow_field {
> #define ICE_FLOW_HASH_FLD_SCTP_DST_PORT \
> BIT_ULL(ICE_FLOW_FIELD_IDX_SCTP_DST_PORT)
>
> +#define ICE_FLOW_HASH_FLD_GTPC_TEID BIT_ULL(ICE_FLOW_FIELD_IDX_GTPC_TEID)
> +#define ICE_FLOW_HASH_FLD_GTPU_IP_TEID BIT_ULL(ICE_FLOW_FIELD_IDX_GTPU_IP_TEID)
> +#define ICE_FLOW_HASH_FLD_GTPU_EH_TEID BIT_ULL(ICE_FLOW_FIELD_IDX_GTPU_EH_TEID)
> +#define ICE_FLOW_HASH_FLD_GTPU_UP_TEID BIT_ULL(ICE_FLOW_FIELD_IDX_GTPU_UP_TEID)
> +#define ICE_FLOW_HASH_FLD_GTPU_DWN_TEID \
> + BIT_ULL(ICE_FLOW_FIELD_IDX_GTPU_DWN_TEID)
> +
> /* Flow headers and fields for AVF support */
> enum ice_flow_avf_hdr_field {
> /* Values 0 - 28 are reserved for future use */
> diff --git a/drivers/net/ethernet/intel/ice/ice_lib.c b/drivers/net/ethernet/intel/ice/ice_lib.c
> index 9be724291ef8..3c4282019570 100644
> --- a/drivers/net/ethernet/intel/ice/ice_lib.c
> +++ b/drivers/net/ethernet/intel/ice/ice_lib.c
> @@ -1618,6 +1618,25 @@ static const struct ice_rss_hash_cfg default_rss_cfgs[] = {
> */
> {ICE_FLOW_SEG_HDR_SCTP | ICE_FLOW_SEG_HDR_IPV4,
> ICE_HASH_SCTP_IPV4, ICE_RSS_OUTER_HEADERS, false},
> + /* configure RSS for gtpc4 with input set IPv4 src/dst */
> + {ICE_FLOW_SEG_HDR_GTPC | ICE_FLOW_SEG_HDR_IPV4,
> + ICE_FLOW_HASH_IPV4, ICE_RSS_OUTER_HEADERS, false},
> + /* configure RSS for gtpc4t with input set IPv4 src/dst */
> + {ICE_FLOW_SEG_HDR_GTPC_TEID | ICE_FLOW_SEG_HDR_IPV4,
> + ICE_FLOW_HASH_GTP_C_IPV4_TEID, ICE_RSS_OUTER_HEADERS, false},
> + /* configure RSS for gtpu4 with input set IPv4 src/dst */
> + {ICE_FLOW_SEG_HDR_GTPU_IP | ICE_FLOW_SEG_HDR_IPV4,
> + ICE_FLOW_HASH_GTP_U_IPV4_TEID, ICE_RSS_OUTER_HEADERS, false},
> + /* configure RSS for gtpu4e with input set IPv4 src/dst */
> + {ICE_FLOW_SEG_HDR_GTPU_EH | ICE_FLOW_SEG_HDR_IPV4,
> + ICE_FLOW_HASH_GTP_U_IPV4_EH, ICE_RSS_OUTER_HEADERS, false},
> + /* configure RSS for gtpu4u with input set IPv4 src/dst */
> + { ICE_FLOW_SEG_HDR_GTPU_UP | ICE_FLOW_SEG_HDR_IPV4,
> + ICE_FLOW_HASH_GTP_U_IPV4_UP, ICE_RSS_OUTER_HEADERS, false},
> + /* configure RSS for gtpu4d with input set IPv4 src/dst */
> + {ICE_FLOW_SEG_HDR_GTPU_DWN | ICE_FLOW_SEG_HDR_IPV4,
> + ICE_FLOW_HASH_GTP_U_IPV4_DWN, ICE_RSS_OUTER_HEADERS, false},
> +
> /* configure RSS for tcp6 with input set IPv6 src/dst, TCP src/dst */
> {ICE_FLOW_SEG_HDR_TCP | ICE_FLOW_SEG_HDR_IPV6,
> ICE_HASH_TCP_IPV6, ICE_RSS_ANY_HEADERS, false},
> @@ -1632,6 +1651,24 @@ static const struct ice_rss_hash_cfg default_rss_cfgs[] = {
> /* configure RSS for IPSEC ESP SPI with input set MAC_IPV4_SPI */
> {ICE_FLOW_SEG_HDR_ESP,
> ICE_FLOW_HASH_ESP_SPI, ICE_RSS_OUTER_HEADERS, false},
> + /* configure RSS for gtpc6 with input set IPv6 src/dst */
> + {ICE_FLOW_SEG_HDR_GTPC | ICE_FLOW_SEG_HDR_IPV6,
> + ICE_FLOW_HASH_IPV6, ICE_RSS_OUTER_HEADERS, false},
> + /* configure RSS for gtpc6t with input set IPv6 src/dst */
> + {ICE_FLOW_SEG_HDR_GTPC_TEID | ICE_FLOW_SEG_HDR_IPV6,
> + ICE_FLOW_HASH_GTP_C_IPV6_TEID, ICE_RSS_OUTER_HEADERS, false},
> + /* configure RSS for gtpu6 with input set IPv6 src/dst */
> + {ICE_FLOW_SEG_HDR_GTPU_IP | ICE_FLOW_SEG_HDR_IPV6,
> + ICE_FLOW_HASH_GTP_U_IPV6_TEID, ICE_RSS_OUTER_HEADERS, false},
> + /* configure RSS for gtpu6e with input set IPv6 src/dst */
> + {ICE_FLOW_SEG_HDR_GTPU_EH | ICE_FLOW_SEG_HDR_IPV6,
> + ICE_FLOW_HASH_GTP_U_IPV6_EH, ICE_RSS_OUTER_HEADERS, false},
> + /* configure RSS for gtpu6u with input set IPv6 src/dst */
> + { ICE_FLOW_SEG_HDR_GTPU_UP | ICE_FLOW_SEG_HDR_IPV6,
> + ICE_FLOW_HASH_GTP_U_IPV6_UP, ICE_RSS_OUTER_HEADERS, false},
> + /* configure RSS for gtpu6d with input set IPv6 src/dst */
> + {ICE_FLOW_SEG_HDR_GTPU_DWN | ICE_FLOW_SEG_HDR_IPV6,
> + ICE_FLOW_HASH_GTP_U_IPV6_DWN, ICE_RSS_OUTER_HEADERS, false},
> };
>
> /**
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