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Date: Thu, 29 Feb 2024 12:59:02 +0100
From: "Plachno, Lukasz" <lukasz.plachno@...el.com>
To: <intel-wired-lan@...ts.osuosl.org>
CC: <netdev@...r.kernel.org>, <brett.creeley@....com>, <horms@...nel.org>,
<pmenzel@...gen.mpg.de>, <aleksander.lobakin@...el.com>, Jakub Buchocki
<jakubx.buchocki@...el.com>, Mateusz Pacuszka <mateuszx.pacuszka@...el.com>
Subject: Re: [PATCH iwl-next v7 2/2] ice: Implement 'flow-type ether' rules
On 2/12/2024 12:03 PM, Lukasz Plachno wrote:
> From: Jakub Buchocki <jakubx.buchocki@...el.com>
>
> Add support for 'flow-type ether' Flow Director rules via ethtool.
>
> Create packet segment info for filter configuration based on ethtool
> command parameters. Reuse infrastructure already created for
> ipv4 and ipv6 flows to convert packet segment into
> extraction sequence, which is later used to program the filter
> inside Flow Director block of the Rx pipeline.
>
> Rules not containing masks are processed by the Flow Director,
> and support the following set of input parameters in all combinations:
> src, dst, proto, vlan-etype, vlan, action.
>
> It is possible to specify address mask in ethtool parameters but only
> 00:00:00:00:00 and FF:FF:FF:FF:FF are valid.
> The same applies to proto, vlan-etype and vlan masks:
> only 0x0000 and 0xffff masks are valid.
>
> Testing:
> (DUT) iperf3 -s
> (DUT) ethtool -U ens785f0np0 flow-type ether dst <ens785f0np0 mac> \
> action 10
> (DUT) watch 'ethtool -S ens785f0np0 | grep rx_queue'
> (LP) iperf3 -c ${DUT_IP}
>
> Counters increase only for:
> 'rx_queue_10_packets'
> 'rx_queue_10_bytes'
>
> Signed-off-by: Jakub Buchocki <jakubx.buchocki@...el.com>
> Co-developed-by: Mateusz Pacuszka <mateuszx.pacuszka@...el.com>
> Signed-off-by: Mateusz Pacuszka <mateuszx.pacuszka@...el.com>
> Signed-off-by: Lukasz Plachno <lukasz.plachno@...el.com>
> ---
> .../net/ethernet/intel/ice/ice_ethtool_fdir.c | 130 +++++++++++++++++-
> drivers/net/ethernet/intel/ice/ice_fdir.c | 27 ++++
> drivers/net/ethernet/intel/ice/ice_fdir.h | 5 +
> drivers/net/ethernet/intel/ice/ice_type.h | 1 +
> 4 files changed, 162 insertions(+), 1 deletion(-)
>
> diff --git a/drivers/net/ethernet/intel/ice/ice_ethtool_fdir.c b/drivers/net/ethernet/intel/ice/ice_ethtool_fdir.c
> index 9a1a04f5f146..6963e0da6518 100644
> --- a/drivers/net/ethernet/intel/ice/ice_ethtool_fdir.c
> +++ b/drivers/net/ethernet/intel/ice/ice_ethtool_fdir.c
> @@ -41,6 +41,8 @@ static struct in6_addr zero_ipv6_addr_mask = {
> static int ice_fltr_to_ethtool_flow(enum ice_fltr_ptype flow)
> {
> switch (flow) {
> + case ICE_FLTR_PTYPE_NONF_ETH:
> + return ETHER_FLOW;
> case ICE_FLTR_PTYPE_NONF_IPV4_TCP:
> return TCP_V4_FLOW;
> case ICE_FLTR_PTYPE_NONF_IPV4_UDP:
> @@ -72,6 +74,8 @@ static int ice_fltr_to_ethtool_flow(enum ice_fltr_ptype flow)
> static enum ice_fltr_ptype ice_ethtool_flow_to_fltr(int eth)
> {
> switch (eth) {
> + case ETHER_FLOW:
> + return ICE_FLTR_PTYPE_NONF_ETH;
> case TCP_V4_FLOW:
> return ICE_FLTR_PTYPE_NONF_IPV4_TCP;
> case UDP_V4_FLOW:
> @@ -137,6 +141,10 @@ int ice_get_ethtool_fdir_entry(struct ice_hw *hw, struct ethtool_rxnfc *cmd)
> memset(&fsp->m_ext, 0, sizeof(fsp->m_ext));
>
> switch (fsp->flow_type) {
> + case ETHER_FLOW:
> + fsp->h_u.ether_spec = rule->eth;
> + fsp->m_u.ether_spec = rule->eth_mask;
> + break;
> case IPV4_USER_FLOW:
> fsp->h_u.usr_ip4_spec.ip_ver = ETH_RX_NFC_IP4;
> fsp->h_u.usr_ip4_spec.proto = 0;
> @@ -1193,6 +1201,112 @@ ice_set_fdir_ip6_usr_seg(struct ice_flow_seg_info *seg,
> return 0;
> }
>
> +/**
> + * ice_fdir_vlan_valid - validate VLAN data for Flow Director rule
> + * @fsp: pointer to ethtool Rx flow specification
> + *
> + * Return: true if vlan data is valid, false otherwise
> + */
> +static bool ice_fdir_vlan_valid(struct ethtool_rx_flow_spec *fsp)
> +{
> + if (fsp->m_ext.vlan_etype && !eth_type_vlan(fsp->h_ext.vlan_etype))
> + return false;
> +
> + if (fsp->m_ext.vlan_tci &&
> + ntohs(fsp->h_ext.vlan_tci) >= VLAN_N_VID)
> + return false;
> +
> + return true;
> +}
> +
> +/**
> + * ice_set_ether_flow_seg
> + * @dev: network interface device structure
> + * @seg: flow segment for programming
> + * @eth_spec: mask data from ethtool
> + *
> + * Return: 0 on success and errno in case of error.
> + */
> +static int ice_set_ether_flow_seg(struct device *dev,
> + struct ice_flow_seg_info *seg,
> + struct ethhdr *eth_spec)
> +{
> + ICE_FLOW_SET_HDRS(seg, ICE_FLOW_SEG_HDR_ETH);
> +
> + /* empty rules are not valid */
> + if (is_zero_ether_addr(eth_spec->h_source) &&
> + is_zero_ether_addr(eth_spec->h_dest) &&
> + !eth_spec->h_proto)
> + return -EINVAL;
> +
> + /* Ethertype */
> + if (eth_spec->h_proto == htons(0xFFFF)) {
> + ice_flow_set_fld(seg, ICE_FLOW_FIELD_IDX_ETH_TYPE,
> + ICE_FLOW_FLD_OFF_INVAL,
> + ICE_FLOW_FLD_OFF_INVAL,
> + ICE_FLOW_FLD_OFF_INVAL, false);
> + } else if (eth_spec->h_proto) {
> + dev_warn(dev, "Only 0x0000 or 0xffff proto mask is allowed for flow-type ether");
> + return -EOPNOTSUPP;
> + }
> +
> + /* Source MAC address */
> + if (is_broadcast_ether_addr(eth_spec->h_source))
> + ice_flow_set_fld(seg, ICE_FLOW_FIELD_IDX_ETH_SA,
> + ICE_FLOW_FLD_OFF_INVAL, ICE_FLOW_FLD_OFF_INVAL,
> + ICE_FLOW_FLD_OFF_INVAL, false);
> + else if (!is_zero_ether_addr(eth_spec->h_source))
> + goto err_mask;
> +
> + /* Destination MAC address */
> + if (is_broadcast_ether_addr(eth_spec->h_dest))
> + ice_flow_set_fld(seg, ICE_FLOW_FIELD_IDX_ETH_DA,
> + ICE_FLOW_FLD_OFF_INVAL, ICE_FLOW_FLD_OFF_INVAL,
> + ICE_FLOW_FLD_OFF_INVAL, false);
> + else if (!is_zero_ether_addr(eth_spec->h_dest))
> + goto err_mask;
> +
> + return 0;
> +
> +err_mask:
> + dev_warn(dev, "Only 00:00:00:00:00:00 or ff:ff:ff:ff:ff:ff MAC address mask is allowed for flow-type ether");
> + return -EOPNOTSUPP;
> +}
> +
> +/**
> + * ice_set_fdir_vlan_seg
> + * @seg: flow segment for programming
> + * @ext_masks: masks for additional RX flow fields
> + */
> +static int
> +ice_set_fdir_vlan_seg(struct ice_flow_seg_info *seg,
> + struct ethtool_flow_ext *ext_masks)
> +{
> + ICE_FLOW_SET_HDRS(seg, ICE_FLOW_SEG_HDR_VLAN);
> +
> + if (ext_masks->vlan_etype) {
> + if (ext_masks->vlan_etype != htons(0xFFFF))
> + return -EOPNOTSUPP;
> +
> + ice_flow_set_fld(seg, ICE_FLOW_FIELD_IDX_S_VLAN,
> + ICE_FLOW_FLD_OFF_INVAL,
> + ICE_FLOW_FLD_OFF_INVAL,
> + ICE_FLOW_FLD_OFF_INVAL, false);
> + }
> +
> + if (ext_masks->vlan_tci) {
> + if (ext_masks->vlan_tci != htons(0xFFFF))
> + return -EOPNOTSUPP;
> +
> + ice_flow_set_fld(seg, ICE_FLOW_FIELD_IDX_C_VLAN,
> + ICE_FLOW_FLD_OFF_INVAL,
> + ICE_FLOW_FLD_OFF_INVAL,
> + ICE_FLOW_FLD_OFF_INVAL, false);
> + }
> +
> + return 0;
> +}
> +
> /**
> * ice_cfg_fdir_xtrct_seq - Configure extraction sequence for the given filter
> * @pf: PF structure
> @@ -1209,7 +1323,7 @@ ice_cfg_fdir_xtrct_seq(struct ice_pf *pf, struct ethtool_rx_flow_spec *fsp,
> struct device *dev = ice_pf_to_dev(pf);
> enum ice_fltr_ptype fltr_idx;
> struct ice_hw *hw = &pf->hw;
> - bool perfect_filter;
> + bool perfect_filter = false;
> int ret;
>
> seg = devm_kzalloc(dev, sizeof(*seg), GFP_KERNEL);
> @@ -1262,6 +1376,16 @@ ice_cfg_fdir_xtrct_seq(struct ice_pf *pf, struct ethtool_rx_flow_spec *fsp,
> ret = ice_set_fdir_ip6_usr_seg(seg, &fsp->m_u.usr_ip6_spec,
> &perfect_filter);
> break;
> + case ETHER_FLOW:
> + ret = ice_set_ether_flow_seg(dev, seg, &fsp->m_u.ether_spec);
> + if (!ret && (fsp->m_ext.vlan_etype || fsp->m_ext.vlan_tci)) {
> + if (!ice_fdir_vlan_valid(fsp)) {
> + ret = -EINVAL;
> + break;
> + }
> + ret = ice_set_fdir_vlan_seg(seg, &fsp->m_ext);
> + }
> + break;
> default:
> ret = -EINVAL;
> }
> @@ -1823,6 +1947,10 @@ ice_set_fdir_input_set(struct ice_vsi *vsi, struct ethtool_rx_flow_spec *fsp,
> input->mask.v6.tc = fsp->m_u.usr_ip6_spec.tclass;
> input->mask.v6.proto = fsp->m_u.usr_ip6_spec.l4_proto;
> break;
> + case ETHER_FLOW:
> + input->eth = fsp->h_u.ether_spec;
> + input->eth_mask = fsp->m_u.ether_spec;
> + break;
> default:
> /* not doing un-parsed flow types */
> return -EINVAL;
> diff --git a/drivers/net/ethernet/intel/ice/ice_fdir.c b/drivers/net/ethernet/intel/ice/ice_fdir.c
> index 1f7b26f38818..b51ca73ca6c4 100644
> --- a/drivers/net/ethernet/intel/ice/ice_fdir.c
> +++ b/drivers/net/ethernet/intel/ice/ice_fdir.c
> @@ -4,6 +4,8 @@
> #include "ice_common.h"
>
> /* These are training packet headers used to program flow director filters. */
> +static const u8 ice_fdir_eth_pkt[22];
> +
> static const u8 ice_fdir_tcpv4_pkt[] = {
> 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00,
> 0x00, 0x00, 0x00, 0x00, 0x08, 0x00, 0x45, 0x00,
> @@ -416,6 +418,11 @@ static const u8 ice_fdir_ip6_tun_pkt[] = {
>
> /* Flow Director no-op training packet table */
> static const struct ice_fdir_base_pkt ice_fdir_pkt[] = {
> + {
> + ICE_FLTR_PTYPE_NONF_ETH,
> + sizeof(ice_fdir_eth_pkt), ice_fdir_eth_pkt,
> + sizeof(ice_fdir_eth_pkt), ice_fdir_eth_pkt,
> + },
> {
> ICE_FLTR_PTYPE_NONF_IPV4_TCP,
> sizeof(ice_fdir_tcpv4_pkt), ice_fdir_tcpv4_pkt,
> @@ -914,6 +921,22 @@ ice_fdir_get_gen_prgm_pkt(struct ice_hw *hw, struct ice_fdir_fltr *input,
> * perspective. The input from user is from Rx filter perspective.
> */
> switch (flow) {
> + case ICE_FLTR_PTYPE_NONF_ETH:
> + ice_pkt_insert_mac_addr(loc, input->eth.h_dest);
> + ice_pkt_insert_mac_addr(loc + ETH_ALEN, input->eth.h_source);
> + if (input->ext_data.vlan_tag ||
> + input->ext_data.vlan_type) {
> + ice_pkt_insert_u16(loc, ICE_ETH_TYPE_F_OFFSET,
> + input->ext_data.vlan_type);
> + ice_pkt_insert_u16(loc, ICE_ETH_VLAN_TCI_OFFSET,
> + input->ext_data.vlan_tag);
> + ice_pkt_insert_u16(loc, ICE_ETH_TYPE_VLAN_OFFSET,
> + input->eth.h_proto);
> + } else {
> + ice_pkt_insert_u16(loc, ICE_ETH_TYPE_F_OFFSET,
> + input->eth.h_proto);
> + }
> + break;
> case ICE_FLTR_PTYPE_NONF_IPV4_TCP:
> ice_pkt_insert_u32(loc, ICE_IPV4_DST_ADDR_OFFSET,
> input->ip.v4.src_ip);
> @@ -1201,6 +1224,10 @@ ice_fdir_comp_rules(struct ice_fdir_fltr *a, struct ice_fdir_fltr *b)
> * same flow_type.
> */
> switch (flow_type) {
> + case ICE_FLTR_PTYPE_NONF_ETH:
> + if (!memcmp(&a->eth, &b->eth, sizeof(a->eth)))
> + return true;
> + break;
> case ICE_FLTR_PTYPE_NONF_IPV4_TCP:
> case ICE_FLTR_PTYPE_NONF_IPV4_UDP:
> case ICE_FLTR_PTYPE_NONF_IPV4_SCTP:
> diff --git a/drivers/net/ethernet/intel/ice/ice_fdir.h b/drivers/net/ethernet/intel/ice/ice_fdir.h
> index 1b9b84490689..021ecbac7848 100644
> --- a/drivers/net/ethernet/intel/ice/ice_fdir.h
> +++ b/drivers/net/ethernet/intel/ice/ice_fdir.h
> @@ -8,6 +8,9 @@
> #define ICE_FDIR_MAX_RAW_PKT_SIZE (512 + ICE_FDIR_TUN_PKT_OFF)
>
> /* macros for offsets into packets for flow director programming */
> +#define ICE_ETH_TYPE_F_OFFSET 12
> +#define ICE_ETH_VLAN_TCI_OFFSET 14
> +#define ICE_ETH_TYPE_VLAN_OFFSET 16
> #define ICE_IPV4_SRC_ADDR_OFFSET 26
> #define ICE_IPV4_DST_ADDR_OFFSET 30
> #define ICE_IPV4_TCP_SRC_PORT_OFFSET 34
> @@ -159,6 +162,8 @@ struct ice_fdir_fltr {
> struct list_head fltr_node;
> enum ice_fltr_ptype flow_type;
>
> + struct ethhdr eth, eth_mask;
> +
> union {
> struct ice_fdir_v4 v4;
> struct ice_fdir_v6 v6;
> diff --git a/drivers/net/ethernet/intel/ice/ice_type.h b/drivers/net/ethernet/intel/ice/ice_type.h
> index 6df7c4487ad0..391e48d2bb92 100644
> --- a/drivers/net/ethernet/intel/ice/ice_type.h
> +++ b/drivers/net/ethernet/intel/ice/ice_type.h
> @@ -203,6 +203,7 @@ struct ice_phy_info {
> enum ice_fltr_ptype {
> /* NONE - used for undef/error */
> ICE_FLTR_PTYPE_NONF_NONE = 0,
> + ICE_FLTR_PTYPE_NONF_ETH,
> ICE_FLTR_PTYPE_NONF_IPV4_UDP,
> ICE_FLTR_PTYPE_NONF_IPV4_TCP,
> ICE_FLTR_PTYPE_NONF_IPV4_SCTP,
Internal validation in Intel reported issues with handling of vlan-etype
parameter, I will send v8 when I am able to fix the issue.
Łukasz
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