| // SPDX-License-Identifier: GPL-2.0 |
| /* Copyright 2020, NXP Semiconductors |
| */ |
| #include "sja1105.h" |
| |
| static struct sja1105_rule *sja1105_rule_find(struct sja1105_private *priv, |
| unsigned long cookie) |
| { |
| struct sja1105_rule *rule; |
| |
| list_for_each_entry(rule, &priv->flow_block.rules, list) |
| if (rule->cookie == cookie) |
| return rule; |
| |
| return NULL; |
| } |
| |
| static int sja1105_find_free_l2_policer(struct sja1105_private *priv) |
| { |
| int i; |
| |
| for (i = 0; i < SJA1105_NUM_L2_POLICERS; i++) |
| if (!priv->flow_block.l2_policer_used[i]) |
| return i; |
| |
| return -1; |
| } |
| |
| static int sja1105_setup_bcast_policer(struct sja1105_private *priv, |
| struct netlink_ext_ack *extack, |
| unsigned long cookie, int port, |
| u64 rate_bytes_per_sec, |
| s64 burst) |
| { |
| struct sja1105_rule *rule = sja1105_rule_find(priv, cookie); |
| struct sja1105_l2_policing_entry *policing; |
| bool new_rule = false; |
| unsigned long p; |
| int rc; |
| |
| if (!rule) { |
| rule = kzalloc(sizeof(*rule), GFP_KERNEL); |
| if (!rule) |
| return -ENOMEM; |
| |
| rule->cookie = cookie; |
| rule->type = SJA1105_RULE_BCAST_POLICER; |
| rule->bcast_pol.sharindx = sja1105_find_free_l2_policer(priv); |
| new_rule = true; |
| } |
| |
| if (rule->bcast_pol.sharindx == -1) { |
| NL_SET_ERR_MSG_MOD(extack, "No more L2 policers free"); |
| rc = -ENOSPC; |
| goto out; |
| } |
| |
| policing = priv->static_config.tables[BLK_IDX_L2_POLICING].entries; |
| |
| if (policing[(SJA1105_NUM_PORTS * SJA1105_NUM_TC) + port].sharindx != port) { |
| NL_SET_ERR_MSG_MOD(extack, |
| "Port already has a broadcast policer"); |
| rc = -EEXIST; |
| goto out; |
| } |
| |
| rule->port_mask |= BIT(port); |
| |
| /* Make the broadcast policers of all ports attached to this block |
| * point to the newly allocated policer |
| */ |
| for_each_set_bit(p, &rule->port_mask, SJA1105_NUM_PORTS) { |
| int bcast = (SJA1105_NUM_PORTS * SJA1105_NUM_TC) + p; |
| |
| policing[bcast].sharindx = rule->bcast_pol.sharindx; |
| } |
| |
| policing[rule->bcast_pol.sharindx].rate = div_u64(rate_bytes_per_sec * |
| 512, 1000000); |
| policing[rule->bcast_pol.sharindx].smax = div_u64(rate_bytes_per_sec * |
| PSCHED_NS2TICKS(burst), |
| PSCHED_TICKS_PER_SEC); |
| /* TODO: support per-flow MTU */ |
| policing[rule->bcast_pol.sharindx].maxlen = VLAN_ETH_FRAME_LEN + |
| ETH_FCS_LEN; |
| |
| rc = sja1105_static_config_reload(priv, SJA1105_BEST_EFFORT_POLICING); |
| |
| out: |
| if (rc == 0 && new_rule) { |
| priv->flow_block.l2_policer_used[rule->bcast_pol.sharindx] = true; |
| list_add(&rule->list, &priv->flow_block.rules); |
| } else if (new_rule) { |
| kfree(rule); |
| } |
| |
| return rc; |
| } |
| |
| static int sja1105_setup_tc_policer(struct sja1105_private *priv, |
| struct netlink_ext_ack *extack, |
| unsigned long cookie, int port, int tc, |
| u64 rate_bytes_per_sec, |
| s64 burst) |
| { |
| struct sja1105_rule *rule = sja1105_rule_find(priv, cookie); |
| struct sja1105_l2_policing_entry *policing; |
| bool new_rule = false; |
| unsigned long p; |
| int rc; |
| |
| if (!rule) { |
| rule = kzalloc(sizeof(*rule), GFP_KERNEL); |
| if (!rule) |
| return -ENOMEM; |
| |
| rule->cookie = cookie; |
| rule->type = SJA1105_RULE_TC_POLICER; |
| rule->tc_pol.sharindx = sja1105_find_free_l2_policer(priv); |
| rule->tc_pol.tc = tc; |
| new_rule = true; |
| } |
| |
| if (rule->tc_pol.sharindx == -1) { |
| NL_SET_ERR_MSG_MOD(extack, "No more L2 policers free"); |
| rc = -ENOSPC; |
| goto out; |
| } |
| |
| policing = priv->static_config.tables[BLK_IDX_L2_POLICING].entries; |
| |
| if (policing[(port * SJA1105_NUM_TC) + tc].sharindx != port) { |
| NL_SET_ERR_MSG_MOD(extack, |
| "Port-TC pair already has an L2 policer"); |
| rc = -EEXIST; |
| goto out; |
| } |
| |
| rule->port_mask |= BIT(port); |
| |
| /* Make the policers for traffic class @tc of all ports attached to |
| * this block point to the newly allocated policer |
| */ |
| for_each_set_bit(p, &rule->port_mask, SJA1105_NUM_PORTS) { |
| int index = (p * SJA1105_NUM_TC) + tc; |
| |
| policing[index].sharindx = rule->tc_pol.sharindx; |
| } |
| |
| policing[rule->tc_pol.sharindx].rate = div_u64(rate_bytes_per_sec * |
| 512, 1000000); |
| policing[rule->tc_pol.sharindx].smax = div_u64(rate_bytes_per_sec * |
| PSCHED_NS2TICKS(burst), |
| PSCHED_TICKS_PER_SEC); |
| /* TODO: support per-flow MTU */ |
| policing[rule->tc_pol.sharindx].maxlen = VLAN_ETH_FRAME_LEN + |
| ETH_FCS_LEN; |
| |
| rc = sja1105_static_config_reload(priv, SJA1105_BEST_EFFORT_POLICING); |
| |
| out: |
| if (rc == 0 && new_rule) { |
| priv->flow_block.l2_policer_used[rule->tc_pol.sharindx] = true; |
| list_add(&rule->list, &priv->flow_block.rules); |
| } else if (new_rule) { |
| kfree(rule); |
| } |
| |
| return rc; |
| } |
| |
| static int sja1105_flower_parse_policer(struct sja1105_private *priv, int port, |
| struct netlink_ext_ack *extack, |
| struct flow_cls_offload *cls, |
| u64 rate_bytes_per_sec, |
| s64 burst) |
| { |
| struct flow_rule *rule = flow_cls_offload_flow_rule(cls); |
| struct flow_dissector *dissector = rule->match.dissector; |
| |
| if (dissector->used_keys & |
| ~(BIT(FLOW_DISSECTOR_KEY_BASIC) | |
| BIT(FLOW_DISSECTOR_KEY_CONTROL) | |
| BIT(FLOW_DISSECTOR_KEY_VLAN) | |
| BIT(FLOW_DISSECTOR_KEY_ETH_ADDRS))) { |
| NL_SET_ERR_MSG_MOD(extack, |
| "Unsupported keys used"); |
| return -EOPNOTSUPP; |
| } |
| |
| if (flow_rule_match_key(rule, FLOW_DISSECTOR_KEY_BASIC)) { |
| struct flow_match_basic match; |
| |
| flow_rule_match_basic(rule, &match); |
| if (match.key->n_proto) { |
| NL_SET_ERR_MSG_MOD(extack, |
| "Matching on protocol not supported"); |
| return -EOPNOTSUPP; |
| } |
| } |
| |
| if (flow_rule_match_key(rule, FLOW_DISSECTOR_KEY_ETH_ADDRS)) { |
| u8 bcast[] = {0xff, 0xff, 0xff, 0xff, 0xff, 0xff}; |
| u8 null[] = {0x00, 0x00, 0x00, 0x00, 0x00, 0x00}; |
| struct flow_match_eth_addrs match; |
| |
| flow_rule_match_eth_addrs(rule, &match); |
| |
| if (!ether_addr_equal_masked(match.key->src, null, |
| match.mask->src)) { |
| NL_SET_ERR_MSG_MOD(extack, |
| "Matching on source MAC not supported"); |
| return -EOPNOTSUPP; |
| } |
| |
| if (!ether_addr_equal_masked(match.key->dst, bcast, |
| match.mask->dst)) { |
| NL_SET_ERR_MSG_MOD(extack, |
| "Only matching on broadcast DMAC is supported"); |
| return -EOPNOTSUPP; |
| } |
| |
| return sja1105_setup_bcast_policer(priv, extack, cls->cookie, |
| port, rate_bytes_per_sec, |
| burst); |
| } |
| |
| if (flow_rule_match_key(rule, FLOW_DISSECTOR_KEY_VLAN)) { |
| struct flow_match_vlan match; |
| |
| flow_rule_match_vlan(rule, &match); |
| |
| if (match.key->vlan_id & match.mask->vlan_id) { |
| NL_SET_ERR_MSG_MOD(extack, |
| "Matching on VID is not supported"); |
| return -EOPNOTSUPP; |
| } |
| |
| if (match.mask->vlan_priority != 0x7) { |
| NL_SET_ERR_MSG_MOD(extack, |
| "Masked matching on PCP is not supported"); |
| return -EOPNOTSUPP; |
| } |
| |
| return sja1105_setup_tc_policer(priv, extack, cls->cookie, port, |
| match.key->vlan_priority, |
| rate_bytes_per_sec, |
| burst); |
| } |
| |
| NL_SET_ERR_MSG_MOD(extack, "Not matching on any known key"); |
| return -EOPNOTSUPP; |
| } |
| |
| int sja1105_cls_flower_add(struct dsa_switch *ds, int port, |
| struct flow_cls_offload *cls, bool ingress) |
| { |
| struct flow_rule *rule = flow_cls_offload_flow_rule(cls); |
| struct netlink_ext_ack *extack = cls->common.extack; |
| struct sja1105_private *priv = ds->priv; |
| const struct flow_action_entry *act; |
| int rc = -EOPNOTSUPP, i; |
| |
| flow_action_for_each(i, act, &rule->action) { |
| switch (act->id) { |
| case FLOW_ACTION_POLICE: |
| rc = sja1105_flower_parse_policer(priv, port, extack, cls, |
| act->police.rate_bytes_ps, |
| act->police.burst); |
| break; |
| default: |
| NL_SET_ERR_MSG_MOD(extack, |
| "Action not supported"); |
| break; |
| } |
| } |
| |
| return rc; |
| } |
| |
| int sja1105_cls_flower_del(struct dsa_switch *ds, int port, |
| struct flow_cls_offload *cls, bool ingress) |
| { |
| struct sja1105_private *priv = ds->priv; |
| struct sja1105_rule *rule = sja1105_rule_find(priv, cls->cookie); |
| struct sja1105_l2_policing_entry *policing; |
| int old_sharindx; |
| |
| if (!rule) |
| return 0; |
| |
| policing = priv->static_config.tables[BLK_IDX_L2_POLICING].entries; |
| |
| if (rule->type == SJA1105_RULE_BCAST_POLICER) { |
| int bcast = (SJA1105_NUM_PORTS * SJA1105_NUM_TC) + port; |
| |
| old_sharindx = policing[bcast].sharindx; |
| policing[bcast].sharindx = port; |
| } else if (rule->type == SJA1105_RULE_TC_POLICER) { |
| int index = (port * SJA1105_NUM_TC) + rule->tc_pol.tc; |
| |
| old_sharindx = policing[index].sharindx; |
| policing[index].sharindx = port; |
| } else { |
| return -EINVAL; |
| } |
| |
| rule->port_mask &= ~BIT(port); |
| if (!rule->port_mask) { |
| priv->flow_block.l2_policer_used[old_sharindx] = false; |
| list_del(&rule->list); |
| kfree(rule); |
| } |
| |
| return sja1105_static_config_reload(priv, SJA1105_BEST_EFFORT_POLICING); |
| } |
| |
| void sja1105_flower_setup(struct dsa_switch *ds) |
| { |
| struct sja1105_private *priv = ds->priv; |
| int port; |
| |
| INIT_LIST_HEAD(&priv->flow_block.rules); |
| |
| for (port = 0; port < SJA1105_NUM_PORTS; port++) |
| priv->flow_block.l2_policer_used[port] = true; |
| } |
| |
| void sja1105_flower_teardown(struct dsa_switch *ds) |
| { |
| struct sja1105_private *priv = ds->priv; |
| struct sja1105_rule *rule; |
| struct list_head *pos, *n; |
| |
| list_for_each_safe(pos, n, &priv->flow_block.rules) { |
| rule = list_entry(pos, struct sja1105_rule, list); |
| list_del(&rule->list); |
| kfree(rule); |
| } |
| } |