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nfp: flower: add geneve option push action offload 

Introduce new push geneve option action. This allows offloading
filters configured to entunnel geneve with options.

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>
This commit is contained in:
Pieter Jansen van Vuuren 2018-08-07 17:36:02 +02:00 committed by David S. Miller
parent 0a6e77784f
commit 9e7c32fe44
3 changed files with 114 additions and 7 deletions
Show Stats Download Patch File Download Diff File Expand all files Collapse all files

100
drivers/net/ethernet/netronome/nfp/flower/action.c
View File

@ -32,6 +32,7 @@
*/
#include <linux/bitfield.h>
#include <net/geneve.h>
#include <net/pkt_cls.h>
#include <net/switchdev.h>
#include <net/tc_act/tc_csum.h>
@ -45,7 +46,15 @@
#include "main.h"
#include "../nfp_net_repr.h"
#define NFP_FL_SUPPORTED_IPV4_UDP_TUN_FLAGS (TUNNEL_CSUM | TUNNEL_KEY)
/* The kernel versions of TUNNEL_* are not ABI and therefore vulnerable
* to change. Such changes will break our FW ABI.
*/
#define NFP_FL_TUNNEL_CSUM cpu_to_be16(0x01)
#define NFP_FL_TUNNEL_KEY cpu_to_be16(0x04)
#define NFP_FL_TUNNEL_GENEVE_OPT cpu_to_be16(0x0800)
#define NFP_FL_SUPPORTED_IPV4_UDP_TUN_FLAGS (NFP_FL_TUNNEL_CSUM | \
NFP_FL_TUNNEL_KEY | \
NFP_FL_TUNNEL_GENEVE_OPT)
static void nfp_fl_pop_vlan(struct nfp_fl_pop_vlan *pop_vlan)
{
@ -229,7 +238,71 @@ static struct nfp_fl_pre_tunnel *nfp_fl_pre_tunnel(char *act_data, int act_len)
}
static int
nfp_fl_set_ipv4_udp_tun(struct nfp_fl_set_ipv4_udp_tun *set_tun,
nfp_fl_push_geneve_options(struct nfp_fl_payload *nfp_fl, int *list_len,
const struct tc_action *action)
{
struct ip_tunnel_info *ip_tun = tcf_tunnel_info(action);
int opt_len, opt_cnt, act_start, tot_push_len;
u8 *src = ip_tunnel_info_opts(ip_tun);
/* We need to populate the options in reverse order for HW.
* Therefore we go through the options, calculating the
* number of options and the total size, then we populate
* them in reverse order in the action list.
*/
opt_cnt = 0;
tot_push_len = 0;
opt_len = ip_tun->options_len;
while (opt_len > 0) {
struct geneve_opt *opt = (struct geneve_opt *)src;
opt_cnt++;
if (opt_cnt > NFP_FL_MAX_GENEVE_OPT_CNT)
return -EOPNOTSUPP;
tot_push_len += sizeof(struct nfp_fl_push_geneve) +
opt->length * 4;
if (tot_push_len > NFP_FL_MAX_GENEVE_OPT_ACT)
return -EOPNOTSUPP;
opt_len -= sizeof(struct geneve_opt) + opt->length * 4;
src += sizeof(struct geneve_opt) + opt->length * 4;
}
if (*list_len + tot_push_len > NFP_FL_MAX_A_SIZ)
return -EOPNOTSUPP;
act_start = *list_len;
*list_len += tot_push_len;
src = ip_tunnel_info_opts(ip_tun);
while (opt_cnt) {
struct geneve_opt *opt = (struct geneve_opt *)src;
struct nfp_fl_push_geneve *push;
size_t act_size, len;
opt_cnt--;
act_size = sizeof(struct nfp_fl_push_geneve) + opt->length * 4;
tot_push_len -= act_size;
len = act_start + tot_push_len;
push = (struct nfp_fl_push_geneve *)&nfp_fl->action_data[len];
push->head.jump_id = NFP_FL_ACTION_OPCODE_PUSH_GENEVE;
push->head.len_lw = act_size >> NFP_FL_LW_SIZ;
push->reserved = 0;
push->class = opt->opt_class;
push->type = opt->type;
push->length = opt->length;
memcpy(&push->opt_data, opt->opt_data, opt->length * 4);
src += sizeof(struct geneve_opt) + opt->length * 4;
}
return 0;
}
static int
nfp_fl_set_ipv4_udp_tun(struct nfp_app *app,
struct nfp_fl_set_ipv4_udp_tun *set_tun,
const struct tc_action *action,
struct nfp_fl_pre_tunnel *pre_tun,
enum nfp_flower_tun_type tun_type,
@ -237,11 +310,17 @@ nfp_fl_set_ipv4_udp_tun(struct nfp_fl_set_ipv4_udp_tun *set_tun,
{
size_t act_size = sizeof(struct nfp_fl_set_ipv4_udp_tun);
struct ip_tunnel_info *ip_tun = tcf_tunnel_info(action);
struct nfp_flower_priv *priv = app->priv;
u32 tmp_set_ip_tun_type_index = 0;
/* Currently support one pre-tunnel so index is always 0. */
int pretun_idx = 0;
if (ip_tun->options_len)
BUILD_BUG_ON(NFP_FL_TUNNEL_CSUM != TUNNEL_CSUM ||
NFP_FL_TUNNEL_KEY != TUNNEL_KEY ||
NFP_FL_TUNNEL_GENEVE_OPT != TUNNEL_GENEVE_OPT);
if (ip_tun->options_len &&
(tun_type != NFP_FL_TUNNEL_GENEVE ||
!(priv->flower_ext_feats & NFP_FL_FEATS_GENEVE_OPT)))
return -EOPNOTSUPP;
set_tun->head.jump_id = NFP_FL_ACTION_OPCODE_SET_IPV4_TUNNEL;
@ -281,11 +360,16 @@ nfp_fl_set_ipv4_udp_tun(struct nfp_fl_set_ipv4_udp_tun *set_tun,
set_tun->tos = ip_tun->key.tos;
if (!(ip_tun->key.tun_flags & TUNNEL_KEY) ||
if (!(ip_tun->key.tun_flags & NFP_FL_TUNNEL_KEY) ||
ip_tun->key.tun_flags & ~NFP_FL_SUPPORTED_IPV4_UDP_TUN_FLAGS)
return -EOPNOTSUPP;
set_tun->tun_flags = ip_tun->key.tun_flags;
if (tun_type == NFP_FL_TUNNEL_GENEVE) {
set_tun->tun_proto = htons(ETH_P_TEB);
set_tun->tun_len = ip_tun->options_len / 4;
}
/* Complete pre_tunnel action. */
pre_tun->ipv4_dst = ip_tun->key.u.ipv4.dst;
@ -674,9 +758,13 @@ nfp_flower_loop_action(struct nfp_app *app, const struct tc_action *a,
nfp_fl->meta.shortcut = cpu_to_be32(NFP_FL_SC_ACT_NULL);
*a_len += sizeof(struct nfp_fl_pre_tunnel);
err = nfp_fl_push_geneve_options(nfp_fl, a_len, a);
if (err)
return err;
set_tun = (void *)&nfp_fl->action_data[*a_len];
err = nfp_fl_set_ipv4_udp_tun(set_tun, a, pre_tun, *tun_type,
netdev);
err = nfp_fl_set_ipv4_udp_tun(app, set_tun, a, pre_tun,
*tun_type, netdev);
if (err)
return err;
*a_len += sizeof(struct nfp_fl_set_ipv4_udp_tun);

20
drivers/net/ethernet/netronome/nfp/flower/cmsg.h
View File

@ -37,6 +37,7 @@
#include <linux/bitfield.h>
#include <linux/skbuff.h>
#include <linux/types.h>
#include <net/geneve.h>
#include "../nfp_app.h"
#include "../nfpcore/nfp_cpp.h"
@ -81,6 +82,10 @@
#define NFP_FL_MAX_A_SIZ 1216
#define NFP_FL_LW_SIZ 2
/* Maximum allowed geneve options */
#define NFP_FL_MAX_GENEVE_OPT_ACT 32
#define NFP_FL_MAX_GENEVE_OPT_CNT 64
/* Action opcodes */
#define NFP_FL_ACTION_OPCODE_OUTPUT 0
#define NFP_FL_ACTION_OPCODE_PUSH_VLAN 1
@ -94,6 +99,7 @@
#define NFP_FL_ACTION_OPCODE_SET_TCP 15
#define NFP_FL_ACTION_OPCODE_PRE_LAG 16
#define NFP_FL_ACTION_OPCODE_PRE_TUNNEL 17
#define NFP_FL_ACTION_OPCODE_PUSH_GENEVE 26
#define NFP_FL_ACTION_OPCODE_NUM 32
#define NFP_FL_OUT_FLAGS_LAST BIT(15)
@ -206,7 +212,19 @@ struct nfp_fl_set_ipv4_udp_tun {
__be16 tun_flags;
u8 ttl;
u8 tos;
__be32 extra[2];
__be32 extra;
u8 tun_len;
u8 res2;
__be16 tun_proto;
};
struct nfp_fl_push_geneve {
struct nfp_fl_act_head head;
__be16 reserved;
__be16 class;
u8 type;
u8 length;
u8 opt_data[];
};
/* Metadata with L2 (1W/4B)

1
drivers/net/ethernet/netronome/nfp/flower/main.h
View File

@ -69,6 +69,7 @@ struct nfp_app;
/* Extra features bitmap. */
#define NFP_FL_FEATS_GENEVE BIT(0)
#define NFP_FL_NBI_MTU_SETTING BIT(1)
#define NFP_FL_FEATS_GENEVE_OPT BIT(2)
#define NFP_FL_FEATS_LAG BIT(31)
struct nfp_fl_mask_id {