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nfp: add set ethernet header action flower offload
Previously we did not have offloading support for set ethernet actions. This patch enables TC flower offload of set ethernet actions. Signed-off-by: Pieter Jansen van Vuuren <pieter.jansenvanvuuren@netronome.com> Reviewed-by: Jakub Kicinski <jakub.kicinski@netronome.com> Signed-off-by: Simon Horman <simon.horman@netronome.com> Signed-off-by: David S. Miller <davem@davemloft.net>
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2 changed files with 93 additions and 0 deletions
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@ -36,6 +36,7 @@
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#include <net/switchdev.h>
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#include <net/tc_act/tc_gact.h>
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#include <net/tc_act/tc_mirred.h>
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#include <net/tc_act/tc_pedit.h>
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#include <net/tc_act/tc_vlan.h>
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#include <net/tc_act/tc_tunnel_key.h>
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@ -223,6 +224,87 @@ nfp_fl_set_vxlan(struct nfp_fl_set_vxlan *set_vxlan,
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return 0;
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}
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static void nfp_fl_set_helper32(u32 value, u32 mask, u8 *p_exact, u8 *p_mask)
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{
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u32 oldvalue = get_unaligned((u32 *)p_exact);
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u32 oldmask = get_unaligned((u32 *)p_mask);
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value &= mask;
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value |= oldvalue & ~mask;
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put_unaligned(oldmask | mask, (u32 *)p_mask);
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put_unaligned(value, (u32 *)p_exact);
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}
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static int
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nfp_fl_set_eth(const struct tc_action *action, int idx, u32 off,
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struct nfp_fl_set_eth *set_eth)
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{
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u16 tmp_set_eth_op;
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u32 exact, mask;
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if (off + 4 > ETH_ALEN * 2)
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return -EOPNOTSUPP;
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mask = ~tcf_pedit_mask(action, idx);
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exact = tcf_pedit_val(action, idx);
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if (exact & ~mask)
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return -EOPNOTSUPP;
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nfp_fl_set_helper32(exact, mask, &set_eth->eth_addr_val[off],
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&set_eth->eth_addr_mask[off]);
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set_eth->reserved = cpu_to_be16(0);
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tmp_set_eth_op = FIELD_PREP(NFP_FL_ACT_LEN_LW,
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sizeof(*set_eth) >> NFP_FL_LW_SIZ) |
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FIELD_PREP(NFP_FL_ACT_JMP_ID,
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NFP_FL_ACTION_OPCODE_SET_ETHERNET);
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set_eth->a_op = cpu_to_be16(tmp_set_eth_op);
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return 0;
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}
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static int
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nfp_fl_pedit(const struct tc_action *action, char *nfp_action, int *a_len)
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{
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struct nfp_fl_set_eth set_eth;
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enum pedit_header_type htype;
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int idx, nkeys, err;
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size_t act_size;
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u32 offset, cmd;
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memset(&set_eth, 0, sizeof(set_eth));
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nkeys = tcf_pedit_nkeys(action);
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for (idx = 0; idx < nkeys; idx++) {
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cmd = tcf_pedit_cmd(action, idx);
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htype = tcf_pedit_htype(action, idx);
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offset = tcf_pedit_offset(action, idx);
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if (cmd != TCA_PEDIT_KEY_EX_CMD_SET)
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return -EOPNOTSUPP;
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switch (htype) {
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case TCA_PEDIT_KEY_EX_HDR_TYPE_ETH:
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err = nfp_fl_set_eth(action, idx, offset, &set_eth);
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break;
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default:
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return -EOPNOTSUPP;
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}
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if (err)
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return err;
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}
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if (set_eth.a_op) {
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act_size = sizeof(set_eth);
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memcpy(nfp_action, &set_eth, act_size);
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*a_len += act_size;
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}
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return 0;
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}
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static int
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nfp_flower_loop_action(const struct tc_action *a,
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struct nfp_fl_payload *nfp_fl, int *a_len,
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@ -301,6 +383,9 @@ nfp_flower_loop_action(const struct tc_action *a,
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} else if (is_tcf_tunnel_release(a)) {
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/* Tunnel decap is handled by default so accept action. */
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return 0;
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} else if (is_tcf_pedit(a)) {
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if (nfp_fl_pedit(a, &nfp_fl->action_data[*a_len], a_len))
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return -EOPNOTSUPP;
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} else {
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/* Currently we do not handle any other actions. */
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return -EOPNOTSUPP;
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@ -77,6 +77,7 @@
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#define NFP_FL_ACTION_OPCODE_PUSH_VLAN 1
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#define NFP_FL_ACTION_OPCODE_POP_VLAN 2
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#define NFP_FL_ACTION_OPCODE_SET_IPV4_TUNNEL 6
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#define NFP_FL_ACTION_OPCODE_SET_ETHERNET 7
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#define NFP_FL_ACTION_OPCODE_PRE_TUNNEL 17
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#define NFP_FL_ACTION_OPCODE_NUM 32
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@ -107,6 +108,13 @@ enum nfp_flower_tun_type {
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NFP_FL_TUNNEL_VXLAN = 2,
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};
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struct nfp_fl_set_eth {
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__be16 a_op;
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__be16 reserved;
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u8 eth_addr_mask[ETH_ALEN * 2];
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u8 eth_addr_val[ETH_ALEN * 2];
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};
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struct nfp_fl_output {
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__be16 a_op;
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__be16 flags;
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