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/*
* Copyright (C) 2017 Netronome Systems, Inc.
*
* This software is dual licensed under the GNU General License Version 2,
* June 1991 as shown in the file COPYING in the top-level directory of this
* source tree or the BSD 2-Clause License provided below. You have the
* option to license this software under the complete terms of either license.
*
* The BSD 2-Clause License:
*
* Redistribution and use in source and binary forms, with or
* without modification, are permitted provided that the following
* conditions are met:
*
* 1. Redistributions of source code must retain the above
* copyright notice, this list of conditions and the following
* disclaimer.
*
* 2. Redistributions in binary form must reproduce the above
* copyright notice, this list of conditions and the following
* disclaimer in the documentation and/or other materials
* provided with the distribution.
*
* THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND,
* EXPRESS OR IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF
* MERCHANTABILITY, FITNESS FOR A PARTICULAR PURPOSE AND
* NONINFRINGEMENT. IN NO EVENT SHALL THE AUTHORS OR COPYRIGHT HOLDERS
* BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER LIABILITY, WHETHER IN AN
* ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM, OUT OF OR IN
* CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE
* SOFTWARE.
*/
#include <linux/bitfield.h>
#include <net/pkt_cls.h>
#include <net/switchdev.h>
#include <net/tc_act/tc_gact.h>
#include <net/tc_act/tc_mirred.h>
#include <net/tc_act/tc_vlan.h>
#include "cmsg.h"
#include "main.h"
#include "../nfp_net_repr.h"
static void nfp_fl_pop_vlan(struct nfp_fl_pop_vlan *pop_vlan)
{
size_t act_size = sizeof(struct nfp_fl_pop_vlan);
u16 tmp_pop_vlan_op;
tmp_pop_vlan_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_POP_VLAN);
pop_vlan->a_op = cpu_to_be16(tmp_pop_vlan_op);
pop_vlan->reserved = 0;
}
static void
nfp_fl_push_vlan(struct nfp_fl_push_vlan *push_vlan,
const struct tc_action *action)
{
size_t act_size = sizeof(struct nfp_fl_push_vlan);
struct tcf_vlan *vlan = to_vlan(action);
u16 tmp_push_vlan_tci;
u16 tmp_push_vlan_op;
tmp_push_vlan_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_PUSH_VLAN);
push_vlan->a_op = cpu_to_be16(tmp_push_vlan_op);
/* Set action push vlan parameters. */
push_vlan->reserved = 0;
push_vlan->vlan_tpid = tcf_vlan_push_proto(action);
tmp_push_vlan_tci =
FIELD_PREP(NFP_FL_PUSH_VLAN_PRIO, vlan->tcfv_push_prio) |
FIELD_PREP(NFP_FL_PUSH_VLAN_VID, vlan->tcfv_push_vid) |
NFP_FL_PUSH_VLAN_CFI;
push_vlan->vlan_tci = cpu_to_be16(tmp_push_vlan_tci);
}
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)
{
size_t act_size = sizeof(struct nfp_fl_output);
struct net_device *out_dev;
u16 tmp_output_op;
int ifindex;
/* Set action opcode to output action. */
tmp_output_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_OUTPUT);
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;
if (!nfp_netdev_is_nfp_repr(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 int
nfp_flower_loop_action(const struct tc_action *a,
struct nfp_fl_payload *nfp_fl, int *a_len,
struct net_device *netdev)
{
struct nfp_fl_push_vlan *psh_v;
struct nfp_fl_pop_vlan *pop_v;
struct nfp_fl_output *output;
int err;
if (is_tcf_gact_shot(a)) {
nfp_fl->meta.shortcut = cpu_to_be32(NFP_FL_SC_ACT_DROP);
} else if (is_tcf_mirred_egress_redirect(a)) {
if (*a_len + sizeof(struct nfp_fl_output) > NFP_FL_MAX_A_SIZ)
return -EOPNOTSUPP;
output = (struct nfp_fl_output *)&nfp_fl->action_data[*a_len];
err = nfp_fl_output(output, a, nfp_fl, true, netdev);
if (err)
return err;
*a_len += sizeof(struct nfp_fl_output);
} else if (is_tcf_mirred_egress_mirror(a)) {
if (*a_len + sizeof(struct nfp_fl_output) > NFP_FL_MAX_A_SIZ)
return -EOPNOTSUPP;
output = (struct nfp_fl_output *)&nfp_fl->action_data[*a_len];
err = nfp_fl_output(output, a, nfp_fl, false, netdev);
if (err)
return err;
*a_len += sizeof(struct nfp_fl_output);
} else if (is_tcf_vlan(a) && tcf_vlan_action(a) == TCA_VLAN_ACT_POP) {
if (*a_len + sizeof(struct nfp_fl_pop_vlan) > NFP_FL_MAX_A_SIZ)
return -EOPNOTSUPP;
pop_v = (struct nfp_fl_pop_vlan *)&nfp_fl->action_data[*a_len];
nfp_fl->meta.shortcut = cpu_to_be32(NFP_FL_SC_ACT_POPV);
nfp_fl_pop_vlan(pop_v);
*a_len += sizeof(struct nfp_fl_pop_vlan);
} else if (is_tcf_vlan(a) && tcf_vlan_action(a) == TCA_VLAN_ACT_PUSH) {
if (*a_len + sizeof(struct nfp_fl_push_vlan) > NFP_FL_MAX_A_SIZ)
return -EOPNOTSUPP;
psh_v = (struct nfp_fl_push_vlan *)&nfp_fl->action_data[*a_len];
nfp_fl->meta.shortcut = cpu_to_be32(NFP_FL_SC_ACT_NULL);
nfp_fl_push_vlan(psh_v, a);
*a_len += sizeof(struct nfp_fl_push_vlan);
} else {
/* Currently we do not handle any other actions. */
return -EOPNOTSUPP;
}
return 0;
}
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;
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;
act_len = 0;
act_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);
if (err)
return err;
act_cnt++;
}
/* We optimise when the action list is small, this can unfortunately
* not happen once we have more than one action in the action list.
*/
if (act_cnt > 1)
nfp_flow->meta.shortcut = cpu_to_be32(NFP_FL_SC_ACT_NULL);
nfp_flow->meta.act_len = act_len;
return 0;
}
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