--- /dev/null
+/*
+ * 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;
+
+ 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;
+}
projects / platform / kernel / linux-rpi.git / commitdiff