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nfp: bpf: add support for legacy redirect action

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Data path has redirect support so expressing redirect
to the port frame came from is a trivial matter of
setting the right result code.

Signed-off-by: Jakub Kicinski <jakub.kicinski@netronome.com>
Signed-off-by: David S. Miller <davem@davemloft.net>
This commit is contained in:
Jakub Kicinski 2016-09-21 11:44:06 +01:00 • committed by David S. Miller
parent 9798e6fe4f
commit 2d18421deb
3 changed files with 7 additions and 0 deletions
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1
drivers/net/ethernet/netronome/nfp/nfp_bpf.h
View file

@ -60,6 +60,7 @@ enum static_regs {
enum nfp_bpf_action_type { enum nfp_bpf_action_type {
NN_ACT_TC_DROP, NN_ACT_TC_DROP,
NN_ACT_TC_REDIR,
}; };
/* Software register representation, hardware encoding in asm.h */ /* Software register representation, hardware encoding in asm.h */

2
drivers/net/ethernet/netronome/nfp/nfp_bpf_jit.c
View file

@ -1440,6 +1440,7 @@ static void nfp_outro_tc_legacy(struct nfp_prog *nfp_prog)
{ {
const u8 act2code[] = { const u8 act2code[] = {
[NN_ACT_TC_DROP] = 0x22, [NN_ACT_TC_DROP] = 0x22,
[NN_ACT_TC_REDIR] = 0x24
}; };
/* Target for aborts */ /* Target for aborts */
nfp_prog->tgt_abort = nfp_prog_current_offset(nfp_prog); nfp_prog->tgt_abort = nfp_prog_current_offset(nfp_prog);
@ -1468,6 +1469,7 @@ static void nfp_outro(struct nfp_prog *nfp_prog)
{ {
switch (nfp_prog->act) { switch (nfp_prog->act) {
case NN_ACT_TC_DROP: case NN_ACT_TC_DROP:
case NN_ACT_TC_REDIR:
nfp_outro_tc_legacy(nfp_prog); nfp_outro_tc_legacy(nfp_prog);
break; break;
} }

4
drivers/net/ethernet/netronome/nfp/nfp_net_offload.c
View file

@ -123,6 +123,10 @@ nfp_net_bpf_get_act(struct nfp_net *nn, struct tc_cls_bpf_offload *cls_bpf)
list_for_each_entry(a, &actions, list) { list_for_each_entry(a, &actions, list) {
if (is_tcf_gact_shot(a)) if (is_tcf_gact_shot(a))
return NN_ACT_TC_DROP; return NN_ACT_TC_DROP;
if (is_tcf_mirred_redirect(a) &&
tcf_mirred_ifindex(a) == nn->netdev->ifindex)
return NN_ACT_TC_REDIR;
} }
return -ENOTSUPP; return -ENOTSUPP;