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nfp: compile flower vxlan tunnel set actions

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Compile set tunnel actions for tc flower. Only support VXLAN and ensure a
tunnel destination port of 4789 is used.

Signed-off-by: John Hurley <john.hurley@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:
John Hurley 2017-09-25 12:23:37 +02:00 committed by David S. Miller
parent 611aec101a
commit b27d6a95a7
2 changed files with 180 additions and 22 deletions
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171
drivers/net/ethernet/netronome/nfp/flower/action.c
View File

@ -37,6 +37,7 @@
#include <net/tc_act/tc_gact.h>
#include <net/tc_act/tc_mirred.h>
#include <net/tc_act/tc_vlan.h>
#include <net/tc_act/tc_tunnel_key.h>
#include "cmsg.h"
#include "main.h"
@ -80,14 +81,27 @@ nfp_fl_push_vlan(struct nfp_fl_push_vlan *push_vlan,
push_vlan->vlan_tci = cpu_to_be16(tmp_push_vlan_tci);
}
static bool nfp_fl_netdev_is_tunnel_type(struct net_device *out_dev,
enum nfp_flower_tun_type tun_type)
{
if (!out_dev->rtnl_link_ops)
return false;
if (!strcmp(out_dev->rtnl_link_ops->kind, "vxlan"))
return tun_type == NFP_FL_TUNNEL_VXLAN;
return false;
}
static int
nfp_fl_output(struct nfp_fl_output *output, const struct tc_action *action,
struct nfp_fl_payload *nfp_flow, bool last,
struct net_device *in_dev)
struct net_device *in_dev, enum nfp_flower_tun_type tun_type,
int *tun_out_cnt)
{
size_t act_size = sizeof(struct nfp_fl_output);
u16 tmp_output_op, tmp_flags;
struct net_device *out_dev;
u16 tmp_output_op;
int ifindex;
/* Set action opcode to output action. */
@ -97,34 +111,126 @@ nfp_fl_output(struct nfp_fl_output *output, const struct tc_action *action,
output->a_op = cpu_to_be16(tmp_output_op);
/* Set action output parameters. */
output->flags = cpu_to_be16(last ? NFP_FL_OUT_FLAGS_LAST : 0);
ifindex = tcf_mirred_ifindex(action);
out_dev = __dev_get_by_index(dev_net(in_dev), ifindex);
if (!out_dev)
return -EOPNOTSUPP;
/* Only offload egress ports are on the same device as the ingress
* port.
*/
if (!switchdev_port_same_parent_id(in_dev, out_dev))
return -EOPNOTSUPP;
tmp_flags = last ? NFP_FL_OUT_FLAGS_LAST : 0;
output->port = cpu_to_be32(nfp_repr_get_port_id(out_dev));
if (!output->port)
return -EOPNOTSUPP;
if (tun_type) {
/* Verify the egress netdev matches the tunnel type. */
if (!nfp_fl_netdev_is_tunnel_type(out_dev, tun_type))
return -EOPNOTSUPP;
if (*tun_out_cnt)
return -EOPNOTSUPP;
(*tun_out_cnt)++;
output->flags = cpu_to_be16(tmp_flags |
NFP_FL_OUT_FLAGS_USE_TUN);
output->port = cpu_to_be32(NFP_FL_PORT_TYPE_TUN | tun_type);
} else {
/* Set action output parameters. */
output->flags = cpu_to_be16(tmp_flags);
/* Only offload if egress ports are on the same device as the
* ingress port.
*/
if (!switchdev_port_same_parent_id(in_dev, out_dev))
return -EOPNOTSUPP;
output->port = cpu_to_be32(nfp_repr_get_port_id(out_dev));
if (!output->port)
return -EOPNOTSUPP;
}
nfp_flow->meta.shortcut = output->port;
return 0;
}
static bool nfp_fl_supported_tun_port(const struct tc_action *action)
{
struct ip_tunnel_info *tun = tcf_tunnel_info(action);
return tun->key.tp_dst == htons(NFP_FL_VXLAN_PORT);
}
static struct nfp_fl_pre_tunnel *nfp_fl_pre_tunnel(char *act_data, int act_len)
{
size_t act_size = sizeof(struct nfp_fl_pre_tunnel);
struct nfp_fl_pre_tunnel *pre_tun_act;
u16 tmp_pre_tun_op;
/* Pre_tunnel action must be first on action list.
* If other actions already exist they need pushed forward.
*/
if (act_len)
memmove(act_data + act_size, act_data, act_len);
pre_tun_act = (struct nfp_fl_pre_tunnel *)act_data;
memset(pre_tun_act, 0, act_size);
tmp_pre_tun_op =
FIELD_PREP(NFP_FL_ACT_LEN_LW, act_size >> NFP_FL_LW_SIZ) |
FIELD_PREP(NFP_FL_ACT_JMP_ID, NFP_FL_ACTION_OPCODE_PRE_TUNNEL);
pre_tun_act->a_op = cpu_to_be16(tmp_pre_tun_op);
return pre_tun_act;
}
static int
nfp_fl_set_vxlan(struct nfp_fl_set_vxlan *set_vxlan,
const struct tc_action *action,
struct nfp_fl_pre_tunnel *pre_tun)
{
struct ip_tunnel_info *vxlan = tcf_tunnel_info(action);
size_t act_size = sizeof(struct nfp_fl_set_vxlan);
u32 tmp_set_vxlan_type_index = 0;
u16 tmp_set_vxlan_op;
/* Currently support one pre-tunnel so index is always 0. */
int pretun_idx = 0;
if (vxlan->options_len) {
/* Do not support options e.g. vxlan gpe. */
return -EOPNOTSUPP;
}
tmp_set_vxlan_op =
FIELD_PREP(NFP_FL_ACT_LEN_LW, act_size >> NFP_FL_LW_SIZ) |
FIELD_PREP(NFP_FL_ACT_JMP_ID,
NFP_FL_ACTION_OPCODE_SET_IPV4_TUNNEL);
set_vxlan->a_op = cpu_to_be16(tmp_set_vxlan_op);
/* Set tunnel type and pre-tunnel index. */
tmp_set_vxlan_type_index |=
FIELD_PREP(NFP_FL_IPV4_TUNNEL_TYPE, NFP_FL_TUNNEL_VXLAN) |
FIELD_PREP(NFP_FL_IPV4_PRE_TUN_INDEX, pretun_idx);
set_vxlan->tun_type_index = cpu_to_be32(tmp_set_vxlan_type_index);
set_vxlan->tun_id = vxlan->key.tun_id;
set_vxlan->tun_flags = vxlan->key.tun_flags;
set_vxlan->ipv4_ttl = vxlan->key.ttl;
set_vxlan->ipv4_tos = vxlan->key.tos;
/* Complete pre_tunnel action. */
pre_tun->ipv4_dst = vxlan->key.u.ipv4.dst;
return 0;
}
static int
nfp_flower_loop_action(const struct tc_action *a,
struct nfp_fl_payload *nfp_fl, int *a_len,
struct net_device *netdev)
struct net_device *netdev,
enum nfp_flower_tun_type *tun_type, int *tun_out_cnt)
{
struct nfp_fl_pre_tunnel *pre_tun;
struct nfp_fl_set_vxlan *s_vxl;
struct nfp_fl_push_vlan *psh_v;
struct nfp_fl_pop_vlan *pop_v;
struct nfp_fl_output *output;
@ -137,7 +243,8 @@ nfp_flower_loop_action(const struct tc_action *a,
return -EOPNOTSUPP;
output = (struct nfp_fl_output *)&nfp_fl->action_data[*a_len];
err = nfp_fl_output(output, a, nfp_fl, true, netdev);
err = nfp_fl_output(output, a, nfp_fl, true, netdev, *tun_type,
tun_out_cnt);
if (err)
return err;
@ -147,7 +254,8 @@ nfp_flower_loop_action(const struct tc_action *a,
return -EOPNOTSUPP;
output = (struct nfp_fl_output *)&nfp_fl->action_data[*a_len];
err = nfp_fl_output(output, a, nfp_fl, false, netdev);
err = nfp_fl_output(output, a, nfp_fl, false, netdev, *tun_type,
tun_out_cnt);
if (err)
return err;
@ -170,6 +278,29 @@ nfp_flower_loop_action(const struct tc_action *a,
nfp_fl_push_vlan(psh_v, a);
*a_len += sizeof(struct nfp_fl_push_vlan);
} else if (is_tcf_tunnel_set(a) && nfp_fl_supported_tun_port(a)) {
/* Pre-tunnel action is required for tunnel encap.
* This checks for next hop entries on NFP.
* If none, the packet falls back before applying other actions.
*/
if (*a_len + sizeof(struct nfp_fl_pre_tunnel) +
sizeof(struct nfp_fl_set_vxlan) > NFP_FL_MAX_A_SIZ)
return -EOPNOTSUPP;
*tun_type = NFP_FL_TUNNEL_VXLAN;
pre_tun = nfp_fl_pre_tunnel(nfp_fl->action_data, *a_len);
nfp_fl->meta.shortcut = cpu_to_be32(NFP_FL_SC_ACT_NULL);
*a_len += sizeof(struct nfp_fl_pre_tunnel);
s_vxl = (struct nfp_fl_set_vxlan *)&nfp_fl->action_data[*a_len];
err = nfp_fl_set_vxlan(s_vxl, a, pre_tun);
if (err)
return err;
*a_len += sizeof(struct nfp_fl_set_vxlan);
} else if (is_tcf_tunnel_release(a)) {
/* Tunnel decap is handled by default so accept action. */
return 0;
} else {
/* Currently we do not handle any other actions. */
return -EOPNOTSUPP;
@ -182,18 +313,22 @@ int nfp_flower_compile_action(struct tc_cls_flower_offload *flow,
struct net_device *netdev,
struct nfp_fl_payload *nfp_flow)
{
int act_len, act_cnt, err;
int act_len, act_cnt, err, tun_out_cnt;
enum nfp_flower_tun_type tun_type;
const struct tc_action *a;
LIST_HEAD(actions);
memset(nfp_flow->action_data, 0, NFP_FL_MAX_A_SIZ);
nfp_flow->meta.act_len = 0;
tun_type = NFP_FL_TUNNEL_NONE;
act_len = 0;
act_cnt = 0;
tun_out_cnt = 0;
tcf_exts_to_list(flow->exts, &actions);
list_for_each_entry(a, &actions, list) {
err = nfp_flower_loop_action(a, nfp_flow, &act_len, netdev);
err = nfp_flower_loop_action(a, nfp_flow, &act_len, netdev,
&tun_type, &tun_out_cnt);
if (err)
return err;
act_cnt++;

31
drivers/net/ethernet/netronome/nfp/flower/cmsg.h
View File

@ -67,10 +67,12 @@
#define NFP_FL_LW_SIZ 2
/* Action opcodes */
#define NFP_FL_ACTION_OPCODE_OUTPUT 0
#define NFP_FL_ACTION_OPCODE_PUSH_VLAN 1
#define NFP_FL_ACTION_OPCODE_POP_VLAN 2
#define NFP_FL_ACTION_OPCODE_NUM 32
#define NFP_FL_ACTION_OPCODE_OUTPUT 0
#define NFP_FL_ACTION_OPCODE_PUSH_VLAN 1
#define NFP_FL_ACTION_OPCODE_POP_VLAN 2
#define NFP_FL_ACTION_OPCODE_SET_IPV4_TUNNEL 6
#define NFP_FL_ACTION_OPCODE_PRE_TUNNEL 17
#define NFP_FL_ACTION_OPCODE_NUM 32
#define NFP_FL_ACT_JMP_ID GENMASK(15, 8)
#define NFP_FL_ACT_LEN_LW GENMASK(7, 0)
@ -85,6 +87,8 @@
/* Tunnel ports */
#define NFP_FL_PORT_TYPE_TUN 0x50000000
#define NFP_FL_IPV4_TUNNEL_TYPE GENMASK(7, 4)
#define NFP_FL_IPV4_PRE_TUN_INDEX GENMASK(2, 0)
enum nfp_flower_tun_type {
NFP_FL_TUNNEL_NONE = 0,
@ -123,6 +127,25 @@ struct nfp_flower_meta_one {
u16 reserved;
};
struct nfp_fl_pre_tunnel {
__be16 a_op;
__be16 reserved;
__be32 ipv4_dst;
/* reserved for use with IPv6 addresses */
__be32 extra[3];
};
struct nfp_fl_set_vxlan {
__be16 a_op;
__be16 reserved;
__be64 tun_id;
__be32 tun_type_index;
__be16 tun_flags;
u8 ipv4_ttl;
u8 ipv4_tos;
__be32 extra[2];
} __packed;
/* Metadata with L2 (1W/4B)
* ----------------------------------------------------------------
* 3 2 1