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nfp: flower: offload MPLS set action

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Recent additions to the kernel include a TC action module to manipulate
MPLS headers on packets. Such actions are available to offload via the
flow_offload intermediate representation API.

Modify the NFP driver to allow the offload of MPLS set actions to
firmware. Set actions update the outermost MPLS header. The offload
includes a mask to specify which fields should be set.

Signed-off-by: John Hurley <john.hurley@netronome.com>
Reviewed-by: Simon Horman <simon.horman@netronome.com>
Reviewed-by: Jakub Kicinski <jakub.kicinski@netronome.com>
Signed-off-by: David S. Miller <davem@davemloft.net>
This commit is contained in:
John Hurley 2019-07-23 15:34:02 +01:00 committed by David S. Miller
parent 35b7c70cc3
commit e03e47a3dc
2 changed files with 53 additions and 0 deletions
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45
drivers/net/ethernet/netronome/nfp/flower/action.c
View File

@ -70,6 +70,37 @@ nfp_fl_pop_mpls(struct nfp_fl_pop_mpls *pop_mpls,
pop_mpls->ethtype = act->mpls_pop.proto;
}
static void
nfp_fl_set_mpls(struct nfp_fl_set_mpls *set_mpls,
const struct flow_action_entry *act)
{
size_t act_size = sizeof(struct nfp_fl_set_mpls);
u32 mpls_lse = 0, mpls_mask = 0;
set_mpls->head.jump_id = NFP_FL_ACTION_OPCODE_SET_MPLS;
set_mpls->head.len_lw = act_size >> NFP_FL_LW_SIZ;
if (act->mpls_mangle.label != ACT_MPLS_LABEL_NOT_SET) {
mpls_lse |= act->mpls_mangle.label << MPLS_LS_LABEL_SHIFT;
mpls_mask |= MPLS_LS_LABEL_MASK;
}
if (act->mpls_mangle.tc != ACT_MPLS_TC_NOT_SET) {
mpls_lse |= act->mpls_mangle.tc << MPLS_LS_TC_SHIFT;
mpls_mask |= MPLS_LS_TC_MASK;
}
if (act->mpls_mangle.bos != ACT_MPLS_BOS_NOT_SET) {
mpls_lse |= act->mpls_mangle.bos << MPLS_LS_S_SHIFT;
mpls_mask |= MPLS_LS_S_MASK;
}
if (act->mpls_mangle.ttl) {
mpls_lse |= act->mpls_mangle.ttl << MPLS_LS_TTL_SHIFT;
mpls_mask |= MPLS_LS_TTL_MASK;
}
set_mpls->lse = cpu_to_be32(mpls_lse);
set_mpls->lse_mask = cpu_to_be32(mpls_mask);
}
static void nfp_fl_pop_vlan(struct nfp_fl_pop_vlan *pop_vlan)
{
size_t act_size = sizeof(struct nfp_fl_pop_vlan);
@ -917,6 +948,7 @@ nfp_flower_loop_action(struct nfp_app *app, const struct flow_action_entry *act,
struct nfp_fl_push_mpls *psh_m;
struct nfp_fl_pop_vlan *pop_v;
struct nfp_fl_pop_mpls *pop_m;
struct nfp_fl_set_mpls *set_m;
int err;
switch (act->id) {
@ -1050,6 +1082,19 @@ nfp_flower_loop_action(struct nfp_app *app, const struct flow_action_entry *act,
nfp_fl_pop_mpls(pop_m, act);
*a_len += sizeof(struct nfp_fl_pop_mpls);
break;
case FLOW_ACTION_MPLS_MANGLE:
if (*a_len +
sizeof(struct nfp_fl_set_mpls) > NFP_FL_MAX_A_SIZ) {
NL_SET_ERR_MSG_MOD(extack, "unsupported offload: maximum allowed action list size exceeded at set MPLS");
return -EOPNOTSUPP;
}
set_m = (struct nfp_fl_set_mpls *)&nfp_fl->action_data[*a_len];
nfp_fl->meta.shortcut = cpu_to_be32(NFP_FL_SC_ACT_NULL);
nfp_fl_set_mpls(set_m, act);
*a_len += sizeof(struct nfp_fl_set_mpls);
break;
default:
/* Currently we do not handle any other actions. */
NL_SET_ERR_MSG_MOD(extack, "unsupported offload: unsupported action in action list");

8
drivers/net/ethernet/netronome/nfp/flower/cmsg.h
View File

@ -72,6 +72,7 @@
#define NFP_FL_ACTION_OPCODE_POP_MPLS 4
#define NFP_FL_ACTION_OPCODE_SET_IPV4_TUNNEL 6
#define NFP_FL_ACTION_OPCODE_SET_ETHERNET 7
#define NFP_FL_ACTION_OPCODE_SET_MPLS 8
#define NFP_FL_ACTION_OPCODE_SET_IPV4_ADDRS 9
#define NFP_FL_ACTION_OPCODE_SET_IPV4_TTL_TOS 10
#define NFP_FL_ACTION_OPCODE_SET_IPV6_SRC 11
@ -245,6 +246,13 @@ struct nfp_fl_pop_mpls {
__be16 ethtype;
};
struct nfp_fl_set_mpls {
struct nfp_fl_act_head head;
__be16 reserved;
__be32 lse_mask;
__be32 lse;
};
/* Metadata with L2 (1W/4B)
* ----------------------------------------------------------------
* 3 2 1