| /* Broadcom NetXtreme-C/E network driver. |
| * |
| * Copyright (c) 2017 Broadcom Limited |
| * |
| * This program is free software; you can redistribute it and/or modify |
| * it under the terms of the GNU General Public License as published by |
| * the Free Software Foundation. |
| */ |
| |
| #include <linux/netdevice.h> |
| #include <linux/inetdevice.h> |
| #include <linux/if_vlan.h> |
| #include <net/flow_dissector.h> |
| #include <net/pkt_cls.h> |
| #include <net/tc_act/tc_gact.h> |
| #include <net/tc_act/tc_skbedit.h> |
| #include <net/tc_act/tc_mirred.h> |
| #include <net/tc_act/tc_vlan.h> |
| #include <net/tc_act/tc_tunnel_key.h> |
| |
| #include "bnxt_hsi.h" |
| #include "bnxt.h" |
| #include "bnxt_sriov.h" |
| #include "bnxt_tc.h" |
| #include "bnxt_vfr.h" |
| |
| #define BNXT_FID_INVALID 0xffff |
| #define VLAN_TCI(vid, prio) ((vid) | ((prio) << VLAN_PRIO_SHIFT)) |
| |
| #define is_vlan_pcp_wildcarded(vlan_tci_mask) \ |
| ((ntohs(vlan_tci_mask) & VLAN_PRIO_MASK) == 0x0000) |
| #define is_vlan_pcp_exactmatch(vlan_tci_mask) \ |
| ((ntohs(vlan_tci_mask) & VLAN_PRIO_MASK) == VLAN_PRIO_MASK) |
| #define is_vlan_pcp_zero(vlan_tci) \ |
| ((ntohs(vlan_tci) & VLAN_PRIO_MASK) == 0x0000) |
| #define is_vid_exactmatch(vlan_tci_mask) \ |
| ((ntohs(vlan_tci_mask) & VLAN_VID_MASK) == VLAN_VID_MASK) |
| |
| /* Return the dst fid of the func for flow forwarding |
| * For PFs: src_fid is the fid of the PF |
| * For VF-reps: src_fid the fid of the VF |
| */ |
| static u16 bnxt_flow_get_dst_fid(struct bnxt *pf_bp, struct net_device *dev) |
| { |
| struct bnxt *bp; |
| |
| /* check if dev belongs to the same switch */ |
| if (!netdev_port_same_parent_id(pf_bp->dev, dev)) { |
| netdev_info(pf_bp->dev, "dev(ifindex=%d) not on same switch", |
| dev->ifindex); |
| return BNXT_FID_INVALID; |
| } |
| |
| /* Is dev a VF-rep? */ |
| if (bnxt_dev_is_vf_rep(dev)) |
| return bnxt_vf_rep_get_fid(dev); |
| |
| bp = netdev_priv(dev); |
| return bp->pf.fw_fid; |
| } |
| |
| static int bnxt_tc_parse_redir(struct bnxt *bp, |
| struct bnxt_tc_actions *actions, |
| const struct flow_action_entry *act) |
| { |
| struct net_device *dev = act->dev; |
| |
| if (!dev) { |
| netdev_info(bp->dev, "no dev in mirred action"); |
| return -EINVAL; |
| } |
| |
| actions->flags |= BNXT_TC_ACTION_FLAG_FWD; |
| actions->dst_dev = dev; |
| return 0; |
| } |
| |
| static int bnxt_tc_parse_vlan(struct bnxt *bp, |
| struct bnxt_tc_actions *actions, |
| const struct flow_action_entry *act) |
| { |
| switch (act->id) { |
| case FLOW_ACTION_VLAN_POP: |
| actions->flags |= BNXT_TC_ACTION_FLAG_POP_VLAN; |
| break; |
| case FLOW_ACTION_VLAN_PUSH: |
| actions->flags |= BNXT_TC_ACTION_FLAG_PUSH_VLAN; |
| actions->push_vlan_tci = htons(act->vlan.vid); |
| actions->push_vlan_tpid = act->vlan.proto; |
| break; |
| default: |
| return -EOPNOTSUPP; |
| } |
| return 0; |
| } |
| |
| static int bnxt_tc_parse_tunnel_set(struct bnxt *bp, |
| struct bnxt_tc_actions *actions, |
| const struct flow_action_entry *act) |
| { |
| const struct ip_tunnel_info *tun_info = act->tunnel; |
| const struct ip_tunnel_key *tun_key = &tun_info->key; |
| |
| if (ip_tunnel_info_af(tun_info) != AF_INET) { |
| netdev_info(bp->dev, "only IPv4 tunnel-encap is supported"); |
| return -EOPNOTSUPP; |
| } |
| |
| actions->tun_encap_key = *tun_key; |
| actions->flags |= BNXT_TC_ACTION_FLAG_TUNNEL_ENCAP; |
| return 0; |
| } |
| |
| static int bnxt_tc_parse_actions(struct bnxt *bp, |
| struct bnxt_tc_actions *actions, |
| struct flow_action *flow_action) |
| { |
| struct flow_action_entry *act; |
| int i, rc; |
| |
| if (!flow_action_has_entries(flow_action)) { |
| netdev_info(bp->dev, "no actions"); |
| return -EINVAL; |
| } |
| |
| flow_action_for_each(i, act, flow_action) { |
| switch (act->id) { |
| case FLOW_ACTION_DROP: |
| actions->flags |= BNXT_TC_ACTION_FLAG_DROP; |
| return 0; /* don't bother with other actions */ |
| case FLOW_ACTION_REDIRECT: |
| rc = bnxt_tc_parse_redir(bp, actions, act); |
| if (rc) |
| return rc; |
| break; |
| case FLOW_ACTION_VLAN_POP: |
| case FLOW_ACTION_VLAN_PUSH: |
| case FLOW_ACTION_VLAN_MANGLE: |
| rc = bnxt_tc_parse_vlan(bp, actions, act); |
| if (rc) |
| return rc; |
| break; |
| case FLOW_ACTION_TUNNEL_ENCAP: |
| rc = bnxt_tc_parse_tunnel_set(bp, actions, act); |
| if (rc) |
| return rc; |
| break; |
| case FLOW_ACTION_TUNNEL_DECAP: |
| actions->flags |= BNXT_TC_ACTION_FLAG_TUNNEL_DECAP; |
| break; |
| default: |
| break; |
| } |
| } |
| |
| if (actions->flags & BNXT_TC_ACTION_FLAG_FWD) { |
| if (actions->flags & BNXT_TC_ACTION_FLAG_TUNNEL_ENCAP) { |
| /* dst_fid is PF's fid */ |
| actions->dst_fid = bp->pf.fw_fid; |
| } else { |
| /* find the FID from dst_dev */ |
| actions->dst_fid = |
| bnxt_flow_get_dst_fid(bp, actions->dst_dev); |
| if (actions->dst_fid == BNXT_FID_INVALID) |
| return -EINVAL; |
| } |
| } |
| |
| return 0; |
| } |
| |
| static int bnxt_tc_parse_flow(struct bnxt *bp, |
| struct tc_cls_flower_offload *tc_flow_cmd, |
| struct bnxt_tc_flow *flow) |
| { |
| struct flow_rule *rule = tc_cls_flower_offload_flow_rule(tc_flow_cmd); |
| struct flow_dissector *dissector = rule->match.dissector; |
| |
| /* KEY_CONTROL and KEY_BASIC are needed for forming a meaningful key */ |
| if ((dissector->used_keys & BIT(FLOW_DISSECTOR_KEY_CONTROL)) == 0 || |
| (dissector->used_keys & BIT(FLOW_DISSECTOR_KEY_BASIC)) == 0) { |
| netdev_info(bp->dev, "cannot form TC key: used_keys = 0x%x", |
| dissector->used_keys); |
| return -EOPNOTSUPP; |
| } |
| |
| if (flow_rule_match_key(rule, FLOW_DISSECTOR_KEY_BASIC)) { |
| struct flow_match_basic match; |
| |
| flow_rule_match_basic(rule, &match); |
| flow->l2_key.ether_type = match.key->n_proto; |
| flow->l2_mask.ether_type = match.mask->n_proto; |
| |
| if (match.key->n_proto == htons(ETH_P_IP) || |
| match.key->n_proto == htons(ETH_P_IPV6)) { |
| flow->l4_key.ip_proto = match.key->ip_proto; |
| flow->l4_mask.ip_proto = match.mask->ip_proto; |
| } |
| } |
| |
| if (flow_rule_match_key(rule, FLOW_DISSECTOR_KEY_ETH_ADDRS)) { |
| struct flow_match_eth_addrs match; |
| |
| flow_rule_match_eth_addrs(rule, &match); |
| flow->flags |= BNXT_TC_FLOW_FLAGS_ETH_ADDRS; |
| ether_addr_copy(flow->l2_key.dmac, match.key->dst); |
| ether_addr_copy(flow->l2_mask.dmac, match.mask->dst); |
| ether_addr_copy(flow->l2_key.smac, match.key->src); |
| ether_addr_copy(flow->l2_mask.smac, match.mask->src); |
| } |
| |
| if (flow_rule_match_key(rule, FLOW_DISSECTOR_KEY_VLAN)) { |
| struct flow_match_vlan match; |
| |
| flow_rule_match_vlan(rule, &match); |
| flow->l2_key.inner_vlan_tci = |
| cpu_to_be16(VLAN_TCI(match.key->vlan_id, |
| match.key->vlan_priority)); |
| flow->l2_mask.inner_vlan_tci = |
| cpu_to_be16((VLAN_TCI(match.mask->vlan_id, |
| match.mask->vlan_priority))); |
| flow->l2_key.inner_vlan_tpid = htons(ETH_P_8021Q); |
| flow->l2_mask.inner_vlan_tpid = htons(0xffff); |
| flow->l2_key.num_vlans = 1; |
| } |
| |
| if (flow_rule_match_key(rule, FLOW_DISSECTOR_KEY_IPV4_ADDRS)) { |
| struct flow_match_ipv4_addrs match; |
| |
| flow_rule_match_ipv4_addrs(rule, &match); |
| flow->flags |= BNXT_TC_FLOW_FLAGS_IPV4_ADDRS; |
| flow->l3_key.ipv4.daddr.s_addr = match.key->dst; |
| flow->l3_mask.ipv4.daddr.s_addr = match.mask->dst; |
| flow->l3_key.ipv4.saddr.s_addr = match.key->src; |
| flow->l3_mask.ipv4.saddr.s_addr = match.mask->src; |
| } else if (flow_rule_match_key(rule, FLOW_DISSECTOR_KEY_IPV6_ADDRS)) { |
| struct flow_match_ipv6_addrs match; |
| |
| flow_rule_match_ipv6_addrs(rule, &match); |
| flow->flags |= BNXT_TC_FLOW_FLAGS_IPV6_ADDRS; |
| flow->l3_key.ipv6.daddr = match.key->dst; |
| flow->l3_mask.ipv6.daddr = match.mask->dst; |
| flow->l3_key.ipv6.saddr = match.key->src; |
| flow->l3_mask.ipv6.saddr = match.mask->src; |
| } |
| |
| if (flow_rule_match_key(rule, FLOW_DISSECTOR_KEY_PORTS)) { |
| struct flow_match_ports match; |
| |
| flow_rule_match_ports(rule, &match); |
| flow->flags |= BNXT_TC_FLOW_FLAGS_PORTS; |
| flow->l4_key.ports.dport = match.key->dst; |
| flow->l4_mask.ports.dport = match.mask->dst; |
| flow->l4_key.ports.sport = match.key->src; |
| flow->l4_mask.ports.sport = match.mask->src; |
| } |
| |
| if (flow_rule_match_key(rule, FLOW_DISSECTOR_KEY_ICMP)) { |
| struct flow_match_icmp match; |
| |
| flow_rule_match_icmp(rule, &match); |
| flow->flags |= BNXT_TC_FLOW_FLAGS_ICMP; |
| flow->l4_key.icmp.type = match.key->type; |
| flow->l4_key.icmp.code = match.key->code; |
| flow->l4_mask.icmp.type = match.mask->type; |
| flow->l4_mask.icmp.code = match.mask->code; |
| } |
| |
| if (flow_rule_match_key(rule, FLOW_DISSECTOR_KEY_ENC_IPV4_ADDRS)) { |
| struct flow_match_ipv4_addrs match; |
| |
| flow_rule_match_enc_ipv4_addrs(rule, &match); |
| flow->flags |= BNXT_TC_FLOW_FLAGS_TUNL_IPV4_ADDRS; |
| flow->tun_key.u.ipv4.dst = match.key->dst; |
| flow->tun_mask.u.ipv4.dst = match.mask->dst; |
| flow->tun_key.u.ipv4.src = match.key->src; |
| flow->tun_mask.u.ipv4.src = match.mask->src; |
| } else if (flow_rule_match_key(rule, |
| FLOW_DISSECTOR_KEY_ENC_IPV6_ADDRS)) { |
| return -EOPNOTSUPP; |
| } |
| |
| if (flow_rule_match_key(rule, FLOW_DISSECTOR_KEY_ENC_KEYID)) { |
| struct flow_match_enc_keyid match; |
| |
| flow_rule_match_enc_keyid(rule, &match); |
| flow->flags |= BNXT_TC_FLOW_FLAGS_TUNL_ID; |
| flow->tun_key.tun_id = key32_to_tunnel_id(match.key->keyid); |
| flow->tun_mask.tun_id = key32_to_tunnel_id(match.mask->keyid); |
| } |
| |
| if (flow_rule_match_key(rule, FLOW_DISSECTOR_KEY_ENC_PORTS)) { |
| struct flow_match_ports match; |
| |
| flow_rule_match_enc_ports(rule, &match); |
| flow->flags |= BNXT_TC_FLOW_FLAGS_TUNL_PORTS; |
| flow->tun_key.tp_dst = match.key->dst; |
| flow->tun_mask.tp_dst = match.mask->dst; |
| flow->tun_key.tp_src = match.key->src; |
| flow->tun_mask.tp_src = match.mask->src; |
| } |
| |
| return bnxt_tc_parse_actions(bp, &flow->actions, &rule->action); |
| } |
| |
| static int bnxt_hwrm_cfa_flow_free(struct bnxt *bp, |
| struct bnxt_tc_flow_node *flow_node) |
| { |
| struct hwrm_cfa_flow_free_input req = { 0 }; |
| int rc; |
| |
| bnxt_hwrm_cmd_hdr_init(bp, &req, HWRM_CFA_FLOW_FREE, -1, -1); |
| if (bp->fw_cap & BNXT_FW_CAP_OVS_64BIT_HANDLE) |
| req.ext_flow_handle = flow_node->ext_flow_handle; |
| else |
| req.flow_handle = flow_node->flow_handle; |
| |
| rc = hwrm_send_message(bp, &req, sizeof(req), HWRM_CMD_TIMEOUT); |
| if (rc) |
| netdev_info(bp->dev, "%s: Error rc=%d", __func__, rc); |
| |
| if (rc) |
| rc = -EIO; |
| return rc; |
| } |
| |
| static int ipv6_mask_len(struct in6_addr *mask) |
| { |
| int mask_len = 0, i; |
| |
| for (i = 0; i < 4; i++) |
| mask_len += inet_mask_len(mask->s6_addr32[i]); |
| |
| return mask_len; |
| } |
| |
| static bool is_wildcard(void *mask, int len) |
| { |
| const u8 *p = mask; |
| int i; |
| |
| for (i = 0; i < len; i++) { |
| if (p[i] != 0) |
| return false; |
| } |
| return true; |
| } |
| |
| static bool is_exactmatch(void *mask, int len) |
| { |
| const u8 *p = mask; |
| int i; |
| |
| for (i = 0; i < len; i++) |
| if (p[i] != 0xff) |
| return false; |
| |
| return true; |
| } |
| |
| static bool is_vlan_tci_allowed(__be16 vlan_tci_mask, |
| __be16 vlan_tci) |
| { |
| /* VLAN priority must be either exactly zero or fully wildcarded and |
| * VLAN id must be exact match. |
| */ |
| if (is_vid_exactmatch(vlan_tci_mask) && |
| ((is_vlan_pcp_exactmatch(vlan_tci_mask) && |
| is_vlan_pcp_zero(vlan_tci)) || |
| is_vlan_pcp_wildcarded(vlan_tci_mask))) |
| return true; |
| |
| return false; |
| } |
| |
| static bool bits_set(void *key, int len) |
| { |
| const u8 *p = key; |
| int i; |
| |
| for (i = 0; i < len; i++) |
| if (p[i] != 0) |
| return true; |
| |
| return false; |
| } |
| |
| static int bnxt_hwrm_cfa_flow_alloc(struct bnxt *bp, struct bnxt_tc_flow *flow, |
| __le16 ref_flow_handle, |
| __le32 tunnel_handle, |
| struct bnxt_tc_flow_node *flow_node) |
| { |
| struct bnxt_tc_actions *actions = &flow->actions; |
| struct bnxt_tc_l3_key *l3_mask = &flow->l3_mask; |
| struct bnxt_tc_l3_key *l3_key = &flow->l3_key; |
| struct hwrm_cfa_flow_alloc_input req = { 0 }; |
| struct hwrm_cfa_flow_alloc_output *resp; |
| u16 flow_flags = 0, action_flags = 0; |
| int rc; |
| |
| bnxt_hwrm_cmd_hdr_init(bp, &req, HWRM_CFA_FLOW_ALLOC, -1, -1); |
| |
| req.src_fid = cpu_to_le16(flow->src_fid); |
| req.ref_flow_handle = ref_flow_handle; |
| |
| if (actions->flags & BNXT_TC_ACTION_FLAG_TUNNEL_DECAP || |
| actions->flags & BNXT_TC_ACTION_FLAG_TUNNEL_ENCAP) { |
| req.tunnel_handle = tunnel_handle; |
| flow_flags |= CFA_FLOW_ALLOC_REQ_FLAGS_TUNNEL; |
| action_flags |= CFA_FLOW_ALLOC_REQ_ACTION_FLAGS_TUNNEL; |
| } |
| |
| req.ethertype = flow->l2_key.ether_type; |
| req.ip_proto = flow->l4_key.ip_proto; |
| |
| if (flow->flags & BNXT_TC_FLOW_FLAGS_ETH_ADDRS) { |
| memcpy(req.dmac, flow->l2_key.dmac, ETH_ALEN); |
| memcpy(req.smac, flow->l2_key.smac, ETH_ALEN); |
| } |
| |
| if (flow->l2_key.num_vlans > 0) { |
| flow_flags |= CFA_FLOW_ALLOC_REQ_FLAGS_NUM_VLAN_ONE; |
| /* FW expects the inner_vlan_tci value to be set |
| * in outer_vlan_tci when num_vlans is 1 (which is |
| * always the case in TC.) |
| */ |
| req.outer_vlan_tci = flow->l2_key.inner_vlan_tci; |
| } |
| |
| /* If all IP and L4 fields are wildcarded then this is an L2 flow */ |
| if (is_wildcard(l3_mask, sizeof(*l3_mask)) && |
| is_wildcard(&flow->l4_mask, sizeof(flow->l4_mask))) { |
| flow_flags |= CFA_FLOW_ALLOC_REQ_FLAGS_FLOWTYPE_L2; |
| } else { |
| flow_flags |= flow->l2_key.ether_type == htons(ETH_P_IP) ? |
| CFA_FLOW_ALLOC_REQ_FLAGS_FLOWTYPE_IPV4 : |
| CFA_FLOW_ALLOC_REQ_FLAGS_FLOWTYPE_IPV6; |
| |
| if (flow->flags & BNXT_TC_FLOW_FLAGS_IPV4_ADDRS) { |
| req.ip_dst[0] = l3_key->ipv4.daddr.s_addr; |
| req.ip_dst_mask_len = |
| inet_mask_len(l3_mask->ipv4.daddr.s_addr); |
| req.ip_src[0] = l3_key->ipv4.saddr.s_addr; |
| req.ip_src_mask_len = |
| inet_mask_len(l3_mask->ipv4.saddr.s_addr); |
| } else if (flow->flags & BNXT_TC_FLOW_FLAGS_IPV6_ADDRS) { |
| memcpy(req.ip_dst, l3_key->ipv6.daddr.s6_addr32, |
| sizeof(req.ip_dst)); |
| req.ip_dst_mask_len = |
| ipv6_mask_len(&l3_mask->ipv6.daddr); |
| memcpy(req.ip_src, l3_key->ipv6.saddr.s6_addr32, |
| sizeof(req.ip_src)); |
| req.ip_src_mask_len = |
| ipv6_mask_len(&l3_mask->ipv6.saddr); |
| } |
| } |
| |
| if (flow->flags & BNXT_TC_FLOW_FLAGS_PORTS) { |
| req.l4_src_port = flow->l4_key.ports.sport; |
| req.l4_src_port_mask = flow->l4_mask.ports.sport; |
| req.l4_dst_port = flow->l4_key.ports.dport; |
| req.l4_dst_port_mask = flow->l4_mask.ports.dport; |
| } else if (flow->flags & BNXT_TC_FLOW_FLAGS_ICMP) { |
| /* l4 ports serve as type/code when ip_proto is ICMP */ |
| req.l4_src_port = htons(flow->l4_key.icmp.type); |
| req.l4_src_port_mask = htons(flow->l4_mask.icmp.type); |
| req.l4_dst_port = htons(flow->l4_key.icmp.code); |
| req.l4_dst_port_mask = htons(flow->l4_mask.icmp.code); |
| } |
| req.flags = cpu_to_le16(flow_flags); |
| |
| if (actions->flags & BNXT_TC_ACTION_FLAG_DROP) { |
| action_flags |= CFA_FLOW_ALLOC_REQ_ACTION_FLAGS_DROP; |
| } else { |
| if (actions->flags & BNXT_TC_ACTION_FLAG_FWD) { |
| action_flags |= CFA_FLOW_ALLOC_REQ_ACTION_FLAGS_FWD; |
| req.dst_fid = cpu_to_le16(actions->dst_fid); |
| } |
| if (actions->flags & BNXT_TC_ACTION_FLAG_PUSH_VLAN) { |
| action_flags |= |
| CFA_FLOW_ALLOC_REQ_ACTION_FLAGS_L2_HEADER_REWRITE; |
| req.l2_rewrite_vlan_tpid = actions->push_vlan_tpid; |
| req.l2_rewrite_vlan_tci = actions->push_vlan_tci; |
| memcpy(&req.l2_rewrite_dmac, &req.dmac, ETH_ALEN); |
| memcpy(&req.l2_rewrite_smac, &req.smac, ETH_ALEN); |
| } |
| if (actions->flags & BNXT_TC_ACTION_FLAG_POP_VLAN) { |
| action_flags |= |
| CFA_FLOW_ALLOC_REQ_ACTION_FLAGS_L2_HEADER_REWRITE; |
| /* Rewrite config with tpid = 0 implies vlan pop */ |
| req.l2_rewrite_vlan_tpid = 0; |
| memcpy(&req.l2_rewrite_dmac, &req.dmac, ETH_ALEN); |
| memcpy(&req.l2_rewrite_smac, &req.smac, ETH_ALEN); |
| } |
| } |
| req.action_flags = cpu_to_le16(action_flags); |
| |
| mutex_lock(&bp->hwrm_cmd_lock); |
| rc = _hwrm_send_message(bp, &req, sizeof(req), HWRM_CMD_TIMEOUT); |
| if (!rc) { |
| resp = bnxt_get_hwrm_resp_addr(bp, &req); |
| /* CFA_FLOW_ALLOC response interpretation: |
| * fw with fw with |
| * 16-bit 64-bit |
| * flow handle flow handle |
| * =========== =========== |
| * flow_handle flow handle flow context id |
| * ext_flow_handle INVALID flow handle |
| * flow_id INVALID flow counter id |
| */ |
| flow_node->flow_handle = resp->flow_handle; |
| if (bp->fw_cap & BNXT_FW_CAP_OVS_64BIT_HANDLE) { |
| flow_node->ext_flow_handle = resp->ext_flow_handle; |
| flow_node->flow_id = resp->flow_id; |
| } |
| } |
| mutex_unlock(&bp->hwrm_cmd_lock); |
| |
| if (rc == HWRM_ERR_CODE_RESOURCE_ALLOC_ERROR) |
| rc = -ENOSPC; |
| else if (rc) |
| rc = -EIO; |
| return rc; |
| } |
| |
| static int hwrm_cfa_decap_filter_alloc(struct bnxt *bp, |
| struct bnxt_tc_flow *flow, |
| struct bnxt_tc_l2_key *l2_info, |
| __le32 ref_decap_handle, |
| __le32 *decap_filter_handle) |
| { |
| struct hwrm_cfa_decap_filter_alloc_input req = { 0 }; |
| struct hwrm_cfa_decap_filter_alloc_output *resp; |
| struct ip_tunnel_key *tun_key = &flow->tun_key; |
| u32 enables = 0; |
| int rc; |
| |
| bnxt_hwrm_cmd_hdr_init(bp, &req, HWRM_CFA_DECAP_FILTER_ALLOC, -1, -1); |
| |
| req.flags = cpu_to_le32(CFA_DECAP_FILTER_ALLOC_REQ_FLAGS_OVS_TUNNEL); |
| enables |= CFA_DECAP_FILTER_ALLOC_REQ_ENABLES_TUNNEL_TYPE | |
| CFA_DECAP_FILTER_ALLOC_REQ_ENABLES_IP_PROTOCOL; |
| req.tunnel_type = CFA_DECAP_FILTER_ALLOC_REQ_TUNNEL_TYPE_VXLAN; |
| req.ip_protocol = CFA_DECAP_FILTER_ALLOC_REQ_IP_PROTOCOL_UDP; |
| |
| if (flow->flags & BNXT_TC_FLOW_FLAGS_TUNL_ID) { |
| enables |= CFA_DECAP_FILTER_ALLOC_REQ_ENABLES_TUNNEL_ID; |
| /* tunnel_id is wrongly defined in hsi defn. as __le32 */ |
| req.tunnel_id = tunnel_id_to_key32(tun_key->tun_id); |
| } |
| |
| if (flow->flags & BNXT_TC_FLOW_FLAGS_TUNL_ETH_ADDRS) { |
| enables |= CFA_DECAP_FILTER_ALLOC_REQ_ENABLES_DST_MACADDR; |
| ether_addr_copy(req.dst_macaddr, l2_info->dmac); |
| } |
| if (l2_info->num_vlans) { |
| enables |= CFA_DECAP_FILTER_ALLOC_REQ_ENABLES_T_IVLAN_VID; |
| req.t_ivlan_vid = l2_info->inner_vlan_tci; |
| } |
| |
| enables |= CFA_DECAP_FILTER_ALLOC_REQ_ENABLES_ETHERTYPE; |
| req.ethertype = htons(ETH_P_IP); |
| |
| if (flow->flags & BNXT_TC_FLOW_FLAGS_TUNL_IPV4_ADDRS) { |
| enables |= CFA_DECAP_FILTER_ALLOC_REQ_ENABLES_SRC_IPADDR | |
| CFA_DECAP_FILTER_ALLOC_REQ_ENABLES_DST_IPADDR | |
| CFA_DECAP_FILTER_ALLOC_REQ_ENABLES_IPADDR_TYPE; |
| req.ip_addr_type = CFA_DECAP_FILTER_ALLOC_REQ_IP_ADDR_TYPE_IPV4; |
| req.dst_ipaddr[0] = tun_key->u.ipv4.dst; |
| req.src_ipaddr[0] = tun_key->u.ipv4.src; |
| } |
| |
| if (flow->flags & BNXT_TC_FLOW_FLAGS_TUNL_PORTS) { |
| enables |= CFA_DECAP_FILTER_ALLOC_REQ_ENABLES_DST_PORT; |
| req.dst_port = tun_key->tp_dst; |
| } |
| |
| /* Eventhough the decap_handle returned by hwrm_cfa_decap_filter_alloc |
| * is defined as __le32, l2_ctxt_ref_id is defined in HSI as __le16. |
| */ |
| req.l2_ctxt_ref_id = (__force __le16)ref_decap_handle; |
| req.enables = cpu_to_le32(enables); |
| |
| mutex_lock(&bp->hwrm_cmd_lock); |
| rc = _hwrm_send_message(bp, &req, sizeof(req), HWRM_CMD_TIMEOUT); |
| if (!rc) { |
| resp = bnxt_get_hwrm_resp_addr(bp, &req); |
| *decap_filter_handle = resp->decap_filter_id; |
| } else { |
| netdev_info(bp->dev, "%s: Error rc=%d", __func__, rc); |
| } |
| mutex_unlock(&bp->hwrm_cmd_lock); |
| |
| if (rc) |
| rc = -EIO; |
| return rc; |
| } |
| |
| static int hwrm_cfa_decap_filter_free(struct bnxt *bp, |
| __le32 decap_filter_handle) |
| { |
| struct hwrm_cfa_decap_filter_free_input req = { 0 }; |
| int rc; |
| |
| bnxt_hwrm_cmd_hdr_init(bp, &req, HWRM_CFA_DECAP_FILTER_FREE, -1, -1); |
| req.decap_filter_id = decap_filter_handle; |
| |
| rc = hwrm_send_message(bp, &req, sizeof(req), HWRM_CMD_TIMEOUT); |
| if (rc) |
| netdev_info(bp->dev, "%s: Error rc=%d", __func__, rc); |
| |
| if (rc) |
| rc = -EIO; |
| return rc; |
| } |
| |
| static int hwrm_cfa_encap_record_alloc(struct bnxt *bp, |
| struct ip_tunnel_key *encap_key, |
| struct bnxt_tc_l2_key *l2_info, |
| __le32 *encap_record_handle) |
| { |
| struct hwrm_cfa_encap_record_alloc_input req = { 0 }; |
| struct hwrm_cfa_encap_record_alloc_output *resp; |
| struct hwrm_cfa_encap_data_vxlan *encap = |
| (struct hwrm_cfa_encap_data_vxlan *)&req.encap_data; |
| struct hwrm_vxlan_ipv4_hdr *encap_ipv4 = |
| (struct hwrm_vxlan_ipv4_hdr *)encap->l3; |
| int rc; |
| |
| bnxt_hwrm_cmd_hdr_init(bp, &req, HWRM_CFA_ENCAP_RECORD_ALLOC, -1, -1); |
| |
| req.encap_type = CFA_ENCAP_RECORD_ALLOC_REQ_ENCAP_TYPE_VXLAN; |
| |
| ether_addr_copy(encap->dst_mac_addr, l2_info->dmac); |
| ether_addr_copy(encap->src_mac_addr, l2_info->smac); |
| if (l2_info->num_vlans) { |
| encap->num_vlan_tags = l2_info->num_vlans; |
| encap->ovlan_tci = l2_info->inner_vlan_tci; |
| encap->ovlan_tpid = l2_info->inner_vlan_tpid; |
| } |
| |
| encap_ipv4->ver_hlen = 4 << VXLAN_IPV4_HDR_VER_HLEN_VERSION_SFT; |
| encap_ipv4->ver_hlen |= 5 << VXLAN_IPV4_HDR_VER_HLEN_HEADER_LENGTH_SFT; |
| encap_ipv4->ttl = encap_key->ttl; |
| |
| encap_ipv4->dest_ip_addr = encap_key->u.ipv4.dst; |
| encap_ipv4->src_ip_addr = encap_key->u.ipv4.src; |
| encap_ipv4->protocol = IPPROTO_UDP; |
| |
| encap->dst_port = encap_key->tp_dst; |
| encap->vni = tunnel_id_to_key32(encap_key->tun_id); |
| |
| mutex_lock(&bp->hwrm_cmd_lock); |
| rc = _hwrm_send_message(bp, &req, sizeof(req), HWRM_CMD_TIMEOUT); |
| if (!rc) { |
| resp = bnxt_get_hwrm_resp_addr(bp, &req); |
| *encap_record_handle = resp->encap_record_id; |
| } else { |
| netdev_info(bp->dev, "%s: Error rc=%d", __func__, rc); |
| } |
| mutex_unlock(&bp->hwrm_cmd_lock); |
| |
| if (rc) |
| rc = -EIO; |
| return rc; |
| } |
| |
| static int hwrm_cfa_encap_record_free(struct bnxt *bp, |
| __le32 encap_record_handle) |
| { |
| struct hwrm_cfa_encap_record_free_input req = { 0 }; |
| int rc; |
| |
| bnxt_hwrm_cmd_hdr_init(bp, &req, HWRM_CFA_ENCAP_RECORD_FREE, -1, -1); |
| req.encap_record_id = encap_record_handle; |
| |
| rc = hwrm_send_message(bp, &req, sizeof(req), HWRM_CMD_TIMEOUT); |
| if (rc) |
| netdev_info(bp->dev, "%s: Error rc=%d", __func__, rc); |
| |
| if (rc) |
| rc = -EIO; |
| return rc; |
| } |
| |
| static int bnxt_tc_put_l2_node(struct bnxt *bp, |
| struct bnxt_tc_flow_node *flow_node) |
| { |
| struct bnxt_tc_l2_node *l2_node = flow_node->l2_node; |
| struct bnxt_tc_info *tc_info = bp->tc_info; |
| int rc; |
| |
| /* remove flow_node from the L2 shared flow list */ |
| list_del(&flow_node->l2_list_node); |
| if (--l2_node->refcount == 0) { |
| rc = rhashtable_remove_fast(&tc_info->l2_table, &l2_node->node, |
| tc_info->l2_ht_params); |
| if (rc) |
| netdev_err(bp->dev, |
| "Error: %s: rhashtable_remove_fast: %d", |
| __func__, rc); |
| kfree_rcu(l2_node, rcu); |
| } |
| return 0; |
| } |
| |
| static struct bnxt_tc_l2_node * |
| bnxt_tc_get_l2_node(struct bnxt *bp, struct rhashtable *l2_table, |
| struct rhashtable_params ht_params, |
| struct bnxt_tc_l2_key *l2_key) |
| { |
| struct bnxt_tc_l2_node *l2_node; |
| int rc; |
| |
| l2_node = rhashtable_lookup_fast(l2_table, l2_key, ht_params); |
| if (!l2_node) { |
| l2_node = kzalloc(sizeof(*l2_node), GFP_KERNEL); |
| if (!l2_node) { |
| rc = -ENOMEM; |
| return NULL; |
| } |
| |
| l2_node->key = *l2_key; |
| rc = rhashtable_insert_fast(l2_table, &l2_node->node, |
| ht_params); |
| if (rc) { |
| kfree_rcu(l2_node, rcu); |
| netdev_err(bp->dev, |
| "Error: %s: rhashtable_insert_fast: %d", |
| __func__, rc); |
| return NULL; |
| } |
| INIT_LIST_HEAD(&l2_node->common_l2_flows); |
| } |
| return l2_node; |
| } |
| |
| /* Get the ref_flow_handle for a flow by checking if there are any other |
| * flows that share the same L2 key as this flow. |
| */ |
| static int |
| bnxt_tc_get_ref_flow_handle(struct bnxt *bp, struct bnxt_tc_flow *flow, |
| struct bnxt_tc_flow_node *flow_node, |
| __le16 *ref_flow_handle) |
| { |
| struct bnxt_tc_info *tc_info = bp->tc_info; |
| struct bnxt_tc_flow_node *ref_flow_node; |
| struct bnxt_tc_l2_node *l2_node; |
| |
| l2_node = bnxt_tc_get_l2_node(bp, &tc_info->l2_table, |
| tc_info->l2_ht_params, |
| &flow->l2_key); |
| if (!l2_node) |
| return -1; |
| |
| /* If any other flow is using this l2_node, use it's flow_handle |
| * as the ref_flow_handle |
| */ |
| if (l2_node->refcount > 0) { |
| ref_flow_node = list_first_entry(&l2_node->common_l2_flows, |
| struct bnxt_tc_flow_node, |
| l2_list_node); |
| *ref_flow_handle = ref_flow_node->flow_handle; |
| } else { |
| *ref_flow_handle = cpu_to_le16(0xffff); |
| } |
| |
| /* Insert the l2_node into the flow_node so that subsequent flows |
| * with a matching l2 key can use the flow_handle of this flow |
| * as their ref_flow_handle |
| */ |
| flow_node->l2_node = l2_node; |
| list_add(&flow_node->l2_list_node, &l2_node->common_l2_flows); |
| l2_node->refcount++; |
| return 0; |
| } |
| |
| /* After the flow parsing is done, this routine is used for checking |
| * if there are any aspects of the flow that prevent it from being |
| * offloaded. |
| */ |
| static bool bnxt_tc_can_offload(struct bnxt *bp, struct bnxt_tc_flow *flow) |
| { |
| /* If L4 ports are specified then ip_proto must be TCP or UDP */ |
| if ((flow->flags & BNXT_TC_FLOW_FLAGS_PORTS) && |
| (flow->l4_key.ip_proto != IPPROTO_TCP && |
| flow->l4_key.ip_proto != IPPROTO_UDP)) { |
| netdev_info(bp->dev, "Cannot offload non-TCP/UDP (%d) ports", |
| flow->l4_key.ip_proto); |
| return false; |
| } |
| |
| /* Currently source/dest MAC cannot be partial wildcard */ |
| if (bits_set(&flow->l2_key.smac, sizeof(flow->l2_key.smac)) && |
| !is_exactmatch(flow->l2_mask.smac, sizeof(flow->l2_mask.smac))) { |
| netdev_info(bp->dev, "Wildcard match unsupported for Source MAC\n"); |
| return false; |
| } |
| if (bits_set(&flow->l2_key.dmac, sizeof(flow->l2_key.dmac)) && |
| !is_exactmatch(&flow->l2_mask.dmac, sizeof(flow->l2_mask.dmac))) { |
| netdev_info(bp->dev, "Wildcard match unsupported for Dest MAC\n"); |
| return false; |
| } |
| |
| /* Currently VLAN fields cannot be partial wildcard */ |
| if (bits_set(&flow->l2_key.inner_vlan_tci, |
| sizeof(flow->l2_key.inner_vlan_tci)) && |
| !is_vlan_tci_allowed(flow->l2_mask.inner_vlan_tci, |
| flow->l2_key.inner_vlan_tci)) { |
| netdev_info(bp->dev, "Unsupported VLAN TCI\n"); |
| return false; |
| } |
| if (bits_set(&flow->l2_key.inner_vlan_tpid, |
| sizeof(flow->l2_key.inner_vlan_tpid)) && |
| !is_exactmatch(&flow->l2_mask.inner_vlan_tpid, |
| sizeof(flow->l2_mask.inner_vlan_tpid))) { |
| netdev_info(bp->dev, "Wildcard match unsupported for VLAN TPID\n"); |
| return false; |
| } |
| |
| /* Currently Ethertype must be set */ |
| if (!is_exactmatch(&flow->l2_mask.ether_type, |
| sizeof(flow->l2_mask.ether_type))) { |
| netdev_info(bp->dev, "Wildcard match unsupported for Ethertype\n"); |
| return false; |
| } |
| |
| return true; |
| } |
| |
| /* Returns the final refcount of the node on success |
| * or a -ve error code on failure |
| */ |
| static int bnxt_tc_put_tunnel_node(struct bnxt *bp, |
| struct rhashtable *tunnel_table, |
| struct rhashtable_params *ht_params, |
| struct bnxt_tc_tunnel_node *tunnel_node) |
| { |
| int rc; |
| |
| if (--tunnel_node->refcount == 0) { |
| rc = rhashtable_remove_fast(tunnel_table, &tunnel_node->node, |
| *ht_params); |
| if (rc) { |
| netdev_err(bp->dev, "rhashtable_remove_fast rc=%d", rc); |
| rc = -1; |
| } |
| kfree_rcu(tunnel_node, rcu); |
| return rc; |
| } else { |
| return tunnel_node->refcount; |
| } |
| } |
| |
| /* Get (or add) either encap or decap tunnel node from/to the supplied |
| * hash table. |
| */ |
| static struct bnxt_tc_tunnel_node * |
| bnxt_tc_get_tunnel_node(struct bnxt *bp, struct rhashtable *tunnel_table, |
| struct rhashtable_params *ht_params, |
| struct ip_tunnel_key *tun_key) |
| { |
| struct bnxt_tc_tunnel_node *tunnel_node; |
| int rc; |
| |
| tunnel_node = rhashtable_lookup_fast(tunnel_table, tun_key, *ht_params); |
| if (!tunnel_node) { |
| tunnel_node = kzalloc(sizeof(*tunnel_node), GFP_KERNEL); |
| if (!tunnel_node) { |
| rc = -ENOMEM; |
| goto err; |
| } |
| |
| tunnel_node->key = *tun_key; |
| tunnel_node->tunnel_handle = INVALID_TUNNEL_HANDLE; |
| rc = rhashtable_insert_fast(tunnel_table, &tunnel_node->node, |
| *ht_params); |
| if (rc) { |
| kfree_rcu(tunnel_node, rcu); |
| goto err; |
| } |
| } |
| tunnel_node->refcount++; |
| return tunnel_node; |
| err: |
| netdev_info(bp->dev, "error rc=%d", rc); |
| return NULL; |
| } |
| |
| static int bnxt_tc_get_ref_decap_handle(struct bnxt *bp, |
| struct bnxt_tc_flow *flow, |
| struct bnxt_tc_l2_key *l2_key, |
| struct bnxt_tc_flow_node *flow_node, |
| __le32 *ref_decap_handle) |
| { |
| struct bnxt_tc_info *tc_info = bp->tc_info; |
| struct bnxt_tc_flow_node *ref_flow_node; |
| struct bnxt_tc_l2_node *decap_l2_node; |
| |
| decap_l2_node = bnxt_tc_get_l2_node(bp, &tc_info->decap_l2_table, |
| tc_info->decap_l2_ht_params, |
| l2_key); |
| if (!decap_l2_node) |
| return -1; |
| |
| /* If any other flow is using this decap_l2_node, use it's decap_handle |
| * as the ref_decap_handle |
| */ |
| if (decap_l2_node->refcount > 0) { |
| ref_flow_node = |
| list_first_entry(&decap_l2_node->common_l2_flows, |
| struct bnxt_tc_flow_node, |
| decap_l2_list_node); |
| *ref_decap_handle = ref_flow_node->decap_node->tunnel_handle; |
| } else { |
| *ref_decap_handle = INVALID_TUNNEL_HANDLE; |
| } |
| |
| /* Insert the l2_node into the flow_node so that subsequent flows |
| * with a matching decap l2 key can use the decap_filter_handle of |
| * this flow as their ref_decap_handle |
| */ |
| flow_node->decap_l2_node = decap_l2_node; |
| list_add(&flow_node->decap_l2_list_node, |
| &decap_l2_node->common_l2_flows); |
| decap_l2_node->refcount++; |
| return 0; |
| } |
| |
| static void bnxt_tc_put_decap_l2_node(struct bnxt *bp, |
| struct bnxt_tc_flow_node *flow_node) |
| { |
| struct bnxt_tc_l2_node *decap_l2_node = flow_node->decap_l2_node; |
| struct bnxt_tc_info *tc_info = bp->tc_info; |
| int rc; |
| |
| /* remove flow_node from the decap L2 sharing flow list */ |
| list_del(&flow_node->decap_l2_list_node); |
| if (--decap_l2_node->refcount == 0) { |
| rc = rhashtable_remove_fast(&tc_info->decap_l2_table, |
| &decap_l2_node->node, |
| tc_info->decap_l2_ht_params); |
| if (rc) |
| netdev_err(bp->dev, "rhashtable_remove_fast rc=%d", rc); |
| kfree_rcu(decap_l2_node, rcu); |
| } |
| } |
| |
| static void bnxt_tc_put_decap_handle(struct bnxt *bp, |
| struct bnxt_tc_flow_node *flow_node) |
| { |
| __le32 decap_handle = flow_node->decap_node->tunnel_handle; |
| struct bnxt_tc_info *tc_info = bp->tc_info; |
| int rc; |
| |
| if (flow_node->decap_l2_node) |
| bnxt_tc_put_decap_l2_node(bp, flow_node); |
| |
| rc = bnxt_tc_put_tunnel_node(bp, &tc_info->decap_table, |
| &tc_info->decap_ht_params, |
| flow_node->decap_node); |
| if (!rc && decap_handle != INVALID_TUNNEL_HANDLE) |
| hwrm_cfa_decap_filter_free(bp, decap_handle); |
| } |
| |
| static int bnxt_tc_resolve_tunnel_hdrs(struct bnxt *bp, |
| struct ip_tunnel_key *tun_key, |
| struct bnxt_tc_l2_key *l2_info) |
| { |
| #ifdef CONFIG_INET |
| struct net_device *real_dst_dev = bp->dev; |
| struct flowi4 flow = { {0} }; |
| struct net_device *dst_dev; |
| struct neighbour *nbr; |
| struct rtable *rt; |
| int rc; |
| |
| flow.flowi4_proto = IPPROTO_UDP; |
| flow.fl4_dport = tun_key->tp_dst; |
| flow.daddr = tun_key->u.ipv4.dst; |
| |
| rt = ip_route_output_key(dev_net(real_dst_dev), &flow); |
| if (IS_ERR(rt)) { |
| netdev_info(bp->dev, "no route to %pI4b", &flow.daddr); |
| return -EOPNOTSUPP; |
| } |
| |
| /* The route must either point to the real_dst_dev or a dst_dev that |
| * uses the real_dst_dev. |
| */ |
| dst_dev = rt->dst.dev; |
| if (is_vlan_dev(dst_dev)) { |
| #if IS_ENABLED(CONFIG_VLAN_8021Q) |
| struct vlan_dev_priv *vlan = vlan_dev_priv(dst_dev); |
| |
| if (vlan->real_dev != real_dst_dev) { |
| netdev_info(bp->dev, |
| "dst_dev(%s) doesn't use PF-if(%s)", |
| netdev_name(dst_dev), |
| netdev_name(real_dst_dev)); |
| rc = -EOPNOTSUPP; |
| goto put_rt; |
| } |
| l2_info->inner_vlan_tci = htons(vlan->vlan_id); |
| l2_info->inner_vlan_tpid = vlan->vlan_proto; |
| l2_info->num_vlans = 1; |
| #endif |
| } else if (dst_dev != real_dst_dev) { |
| netdev_info(bp->dev, |
| "dst_dev(%s) for %pI4b is not PF-if(%s)", |
| netdev_name(dst_dev), &flow.daddr, |
| netdev_name(real_dst_dev)); |
| rc = -EOPNOTSUPP; |
| goto put_rt; |
| } |
| |
| nbr = dst_neigh_lookup(&rt->dst, &flow.daddr); |
| if (!nbr) { |
| netdev_info(bp->dev, "can't lookup neighbor for %pI4b", |
| &flow.daddr); |
| rc = -EOPNOTSUPP; |
| goto put_rt; |
| } |
| |
| tun_key->u.ipv4.src = flow.saddr; |
| tun_key->ttl = ip4_dst_hoplimit(&rt->dst); |
| neigh_ha_snapshot(l2_info->dmac, nbr, dst_dev); |
| ether_addr_copy(l2_info->smac, dst_dev->dev_addr); |
| neigh_release(nbr); |
| ip_rt_put(rt); |
| |
| return 0; |
| put_rt: |
| ip_rt_put(rt); |
| return rc; |
| #else |
| return -EOPNOTSUPP; |
| #endif |
| } |
| |
| static int bnxt_tc_get_decap_handle(struct bnxt *bp, struct bnxt_tc_flow *flow, |
| struct bnxt_tc_flow_node *flow_node, |
| __le32 *decap_filter_handle) |
| { |
| struct ip_tunnel_key *decap_key = &flow->tun_key; |
| struct bnxt_tc_info *tc_info = bp->tc_info; |
| struct bnxt_tc_l2_key l2_info = { {0} }; |
| struct bnxt_tc_tunnel_node *decap_node; |
| struct ip_tunnel_key tun_key = { 0 }; |
| struct bnxt_tc_l2_key *decap_l2_info; |
| __le32 ref_decap_handle; |
| int rc; |
| |
| /* Check if there's another flow using the same tunnel decap. |
| * If not, add this tunnel to the table and resolve the other |
| * tunnel header fileds. Ignore src_port in the tunnel_key, |
| * since it is not required for decap filters. |
| */ |
| decap_key->tp_src = 0; |
| decap_node = bnxt_tc_get_tunnel_node(bp, &tc_info->decap_table, |
| &tc_info->decap_ht_params, |
| decap_key); |
| if (!decap_node) |
| return -ENOMEM; |
| |
| flow_node->decap_node = decap_node; |
| |
| if (decap_node->tunnel_handle != INVALID_TUNNEL_HANDLE) |
| goto done; |
| |
| /* Resolve the L2 fields for tunnel decap |
| * Resolve the route for remote vtep (saddr) of the decap key |
| * Find it's next-hop mac addrs |
| */ |
| tun_key.u.ipv4.dst = flow->tun_key.u.ipv4.src; |
| tun_key.tp_dst = flow->tun_key.tp_dst; |
| rc = bnxt_tc_resolve_tunnel_hdrs(bp, &tun_key, &l2_info); |
| if (rc) |
| goto put_decap; |
| |
| decap_l2_info = &decap_node->l2_info; |
| /* decap smac is wildcarded */ |
| ether_addr_copy(decap_l2_info->dmac, l2_info.smac); |
| if (l2_info.num_vlans) { |
| decap_l2_info->num_vlans = l2_info.num_vlans; |
| decap_l2_info->inner_vlan_tpid = l2_info.inner_vlan_tpid; |
| decap_l2_info->inner_vlan_tci = l2_info.inner_vlan_tci; |
| } |
| flow->flags |= BNXT_TC_FLOW_FLAGS_TUNL_ETH_ADDRS; |
| |
| /* For getting a decap_filter_handle we first need to check if |
| * there are any other decap flows that share the same tunnel L2 |
| * key and if so, pass that flow's decap_filter_handle as the |
| * ref_decap_handle for this flow. |
| */ |
| rc = bnxt_tc_get_ref_decap_handle(bp, flow, decap_l2_info, flow_node, |
| &ref_decap_handle); |
| if (rc) |
| goto put_decap; |
| |
| /* Issue the hwrm cmd to allocate a decap filter handle */ |
| rc = hwrm_cfa_decap_filter_alloc(bp, flow, decap_l2_info, |
| ref_decap_handle, |
| &decap_node->tunnel_handle); |
| if (rc) |
| goto put_decap_l2; |
| |
| done: |
| *decap_filter_handle = decap_node->tunnel_handle; |
| return 0; |
| |
| put_decap_l2: |
| bnxt_tc_put_decap_l2_node(bp, flow_node); |
| put_decap: |
| bnxt_tc_put_tunnel_node(bp, &tc_info->decap_table, |
| &tc_info->decap_ht_params, |
| flow_node->decap_node); |
| return rc; |
| } |
| |
| static void bnxt_tc_put_encap_handle(struct bnxt *bp, |
| struct bnxt_tc_tunnel_node *encap_node) |
| { |
| __le32 encap_handle = encap_node->tunnel_handle; |
| struct bnxt_tc_info *tc_info = bp->tc_info; |
| int rc; |
| |
| rc = bnxt_tc_put_tunnel_node(bp, &tc_info->encap_table, |
| &tc_info->encap_ht_params, encap_node); |
| if (!rc && encap_handle != INVALID_TUNNEL_HANDLE) |
| hwrm_cfa_encap_record_free(bp, encap_handle); |
| } |
| |
| /* Lookup the tunnel encap table and check if there's an encap_handle |
| * alloc'd already. |
| * If not, query L2 info via a route lookup and issue an encap_record_alloc |
| * cmd to FW. |
| */ |
| static int bnxt_tc_get_encap_handle(struct bnxt *bp, struct bnxt_tc_flow *flow, |
| struct bnxt_tc_flow_node *flow_node, |
| __le32 *encap_handle) |
| { |
| struct ip_tunnel_key *encap_key = &flow->actions.tun_encap_key; |
| struct bnxt_tc_info *tc_info = bp->tc_info; |
| struct bnxt_tc_tunnel_node *encap_node; |
| int rc; |
| |
| /* Check if there's another flow using the same tunnel encap. |
| * If not, add this tunnel to the table and resolve the other |
| * tunnel header fileds |
| */ |
| encap_node = bnxt_tc_get_tunnel_node(bp, &tc_info->encap_table, |
| &tc_info->encap_ht_params, |
| encap_key); |
| if (!encap_node) |
| return -ENOMEM; |
| |
| flow_node->encap_node = encap_node; |
| |
| if (encap_node->tunnel_handle != INVALID_TUNNEL_HANDLE) |
| goto done; |
| |
| rc = bnxt_tc_resolve_tunnel_hdrs(bp, encap_key, &encap_node->l2_info); |
| if (rc) |
| goto put_encap; |
| |
| /* Allocate a new tunnel encap record */ |
| rc = hwrm_cfa_encap_record_alloc(bp, encap_key, &encap_node->l2_info, |
| &encap_node->tunnel_handle); |
| if (rc) |
| goto put_encap; |
| |
| done: |
| *encap_handle = encap_node->tunnel_handle; |
| return 0; |
| |
| put_encap: |
| bnxt_tc_put_tunnel_node(bp, &tc_info->encap_table, |
| &tc_info->encap_ht_params, encap_node); |
| return rc; |
| } |
| |
| static void bnxt_tc_put_tunnel_handle(struct bnxt *bp, |
| struct bnxt_tc_flow *flow, |
| struct bnxt_tc_flow_node *flow_node) |
| { |
| if (flow->actions.flags & BNXT_TC_ACTION_FLAG_TUNNEL_DECAP) |
| bnxt_tc_put_decap_handle(bp, flow_node); |
| else if (flow->actions.flags & BNXT_TC_ACTION_FLAG_TUNNEL_ENCAP) |
| bnxt_tc_put_encap_handle(bp, flow_node->encap_node); |
| } |
| |
| static int bnxt_tc_get_tunnel_handle(struct bnxt *bp, |
| struct bnxt_tc_flow *flow, |
| struct bnxt_tc_flow_node *flow_node, |
| __le32 *tunnel_handle) |
| { |
| if (flow->actions.flags & BNXT_TC_ACTION_FLAG_TUNNEL_DECAP) |
| return bnxt_tc_get_decap_handle(bp, flow, flow_node, |
| tunnel_handle); |
| else if (flow->actions.flags & BNXT_TC_ACTION_FLAG_TUNNEL_ENCAP) |
| return bnxt_tc_get_encap_handle(bp, flow, flow_node, |
| tunnel_handle); |
| else |
| return 0; |
| } |
| static int __bnxt_tc_del_flow(struct bnxt *bp, |
| struct bnxt_tc_flow_node *flow_node) |
| { |
| struct bnxt_tc_info *tc_info = bp->tc_info; |
| int rc; |
| |
| /* send HWRM cmd to free the flow-id */ |
| bnxt_hwrm_cfa_flow_free(bp, flow_node); |
| |
| mutex_lock(&tc_info->lock); |
| |
| /* release references to any tunnel encap/decap nodes */ |
| bnxt_tc_put_tunnel_handle(bp, &flow_node->flow, flow_node); |
| |
| /* release reference to l2 node */ |
| bnxt_tc_put_l2_node(bp, flow_node); |
| |
| mutex_unlock(&tc_info->lock); |
| |
| rc = rhashtable_remove_fast(&tc_info->flow_table, &flow_node->node, |
| tc_info->flow_ht_params); |
| if (rc) |
| netdev_err(bp->dev, "Error: %s: rhashtable_remove_fast rc=%d", |
| __func__, rc); |
| |
| kfree_rcu(flow_node, rcu); |
| return 0; |
| } |
| |
| static void bnxt_tc_set_flow_dir(struct bnxt *bp, struct bnxt_tc_flow *flow, |
| u16 src_fid) |
| { |
| flow->dir = (bp->pf.fw_fid == src_fid) ? BNXT_DIR_RX : BNXT_DIR_TX; |
| } |
| |
| static void bnxt_tc_set_src_fid(struct bnxt *bp, struct bnxt_tc_flow *flow, |
| u16 src_fid) |
| { |
| if (flow->actions.flags & BNXT_TC_ACTION_FLAG_TUNNEL_DECAP) |
| flow->src_fid = bp->pf.fw_fid; |
| else |
| flow->src_fid = src_fid; |
| } |
| |
| /* Add a new flow or replace an existing flow. |
| * Notes on locking: |
| * There are essentially two critical sections here. |
| * 1. while adding a new flow |
| * a) lookup l2-key |
| * b) issue HWRM cmd and get flow_handle |
| * c) link l2-key with flow |
| * 2. while deleting a flow |
| * a) unlinking l2-key from flow |
| * A lock is needed to protect these two critical sections. |
| * |
| * The hash-tables are already protected by the rhashtable API. |
| */ |
| static int bnxt_tc_add_flow(struct bnxt *bp, u16 src_fid, |
| struct tc_cls_flower_offload *tc_flow_cmd) |
| { |
| struct bnxt_tc_flow_node *new_node, *old_node; |
| struct bnxt_tc_info *tc_info = bp->tc_info; |
| struct bnxt_tc_flow *flow; |
| __le32 tunnel_handle = 0; |
| __le16 ref_flow_handle; |
| int rc; |
| |
| /* allocate memory for the new flow and it's node */ |
| new_node = kzalloc(sizeof(*new_node), GFP_KERNEL); |
| if (!new_node) { |
| rc = -ENOMEM; |
| goto done; |
| } |
| new_node->cookie = tc_flow_cmd->cookie; |
| flow = &new_node->flow; |
| |
| rc = bnxt_tc_parse_flow(bp, tc_flow_cmd, flow); |
| if (rc) |
| goto free_node; |
| |
| bnxt_tc_set_src_fid(bp, flow, src_fid); |
| |
| if (bp->fw_cap & BNXT_FW_CAP_OVS_64BIT_HANDLE) |
| bnxt_tc_set_flow_dir(bp, flow, src_fid); |
| |
| if (!bnxt_tc_can_offload(bp, flow)) { |
| rc = -EOPNOTSUPP; |
| goto free_node; |
| } |
| |
| /* If a flow exists with the same cookie, delete it */ |
| old_node = rhashtable_lookup_fast(&tc_info->flow_table, |
| &tc_flow_cmd->cookie, |
| tc_info->flow_ht_params); |
| if (old_node) |
| __bnxt_tc_del_flow(bp, old_node); |
| |
| /* Check if the L2 part of the flow has been offloaded already. |
| * If so, bump up it's refcnt and get it's reference handle. |
| */ |
| mutex_lock(&tc_info->lock); |
| rc = bnxt_tc_get_ref_flow_handle(bp, flow, new_node, &ref_flow_handle); |
| if (rc) |
| goto unlock; |
| |
| /* If the flow involves tunnel encap/decap, get tunnel_handle */ |
| rc = bnxt_tc_get_tunnel_handle(bp, flow, new_node, &tunnel_handle); |
| if (rc) |
| goto put_l2; |
| |
| /* send HWRM cmd to alloc the flow */ |
| rc = bnxt_hwrm_cfa_flow_alloc(bp, flow, ref_flow_handle, |
| tunnel_handle, new_node); |
| if (rc) |
| goto put_tunnel; |
| |
| flow->lastused = jiffies; |
| spin_lock_init(&flow->stats_lock); |
| /* add new flow to flow-table */ |
| rc = rhashtable_insert_fast(&tc_info->flow_table, &new_node->node, |
| tc_info->flow_ht_params); |
| if (rc) |
| goto hwrm_flow_free; |
| |
| mutex_unlock(&tc_info->lock); |
| return 0; |
| |
| hwrm_flow_free: |
| bnxt_hwrm_cfa_flow_free(bp, new_node); |
| put_tunnel: |
| bnxt_tc_put_tunnel_handle(bp, flow, new_node); |
| put_l2: |
| bnxt_tc_put_l2_node(bp, new_node); |
| unlock: |
| mutex_unlock(&tc_info->lock); |
| free_node: |
| kfree_rcu(new_node, rcu); |
| done: |
| netdev_err(bp->dev, "Error: %s: cookie=0x%lx error=%d", |
| __func__, tc_flow_cmd->cookie, rc); |
| return rc; |
| } |
| |
| static int bnxt_tc_del_flow(struct bnxt *bp, |
| struct tc_cls_flower_offload *tc_flow_cmd) |
| { |
| struct bnxt_tc_info *tc_info = bp->tc_info; |
| struct bnxt_tc_flow_node *flow_node; |
| |
| flow_node = rhashtable_lookup_fast(&tc_info->flow_table, |
| &tc_flow_cmd->cookie, |
| tc_info->flow_ht_params); |
| if (!flow_node) |
| return -EINVAL; |
| |
| return __bnxt_tc_del_flow(bp, flow_node); |
| } |
| |
| static int bnxt_tc_get_flow_stats(struct bnxt *bp, |
| struct tc_cls_flower_offload *tc_flow_cmd) |
| { |
| struct bnxt_tc_flow_stats stats, *curr_stats, *prev_stats; |
| struct bnxt_tc_info *tc_info = bp->tc_info; |
| struct bnxt_tc_flow_node *flow_node; |
| struct bnxt_tc_flow *flow; |
| unsigned long lastused; |
| |
| flow_node = rhashtable_lookup_fast(&tc_info->flow_table, |
| &tc_flow_cmd->cookie, |
| tc_info->flow_ht_params); |
| if (!flow_node) |
| return -1; |
| |
| flow = &flow_node->flow; |
| curr_stats = &flow->stats; |
| prev_stats = &flow->prev_stats; |
| |
| spin_lock(&flow->stats_lock); |
| stats.packets = curr_stats->packets - prev_stats->packets; |
| stats.bytes = curr_stats->bytes - prev_stats->bytes; |
| *prev_stats = *curr_stats; |
| lastused = flow->lastused; |
| spin_unlock(&flow->stats_lock); |
| |
| flow_stats_update(&tc_flow_cmd->stats, stats.bytes, stats.packets, |
| lastused); |
| return 0; |
| } |
| |
| static void bnxt_fill_cfa_stats_req(struct bnxt *bp, |
| struct bnxt_tc_flow_node *flow_node, |
| __le16 *flow_handle, __le32 *flow_id) |
| { |
| u16 handle; |
| |
| if (bp->fw_cap & BNXT_FW_CAP_OVS_64BIT_HANDLE) { |
| *flow_id = flow_node->flow_id; |
| |
| /* If flow_id is used to fetch flow stats then: |
| * 1. lower 12 bits of flow_handle must be set to all 1s. |
| * 2. 15th bit of flow_handle must specify the flow |
| * direction (TX/RX). |
| */ |
| if (flow_node->flow.dir == BNXT_DIR_RX) |
| handle = CFA_FLOW_INFO_REQ_FLOW_HANDLE_DIR_RX | |
| CFA_FLOW_INFO_REQ_FLOW_HANDLE_MAX_MASK; |
| else |
| handle = CFA_FLOW_INFO_REQ_FLOW_HANDLE_MAX_MASK; |
| |
| *flow_handle = cpu_to_le16(handle); |
| } else { |
| *flow_handle = flow_node->flow_handle; |
| } |
| } |
| |
| static int |
| bnxt_hwrm_cfa_flow_stats_get(struct bnxt *bp, int num_flows, |
| struct bnxt_tc_stats_batch stats_batch[]) |
| { |
| struct hwrm_cfa_flow_stats_input req = { 0 }; |
| struct hwrm_cfa_flow_stats_output *resp; |
| __le16 *req_flow_handles = &req.flow_handle_0; |
| __le32 *req_flow_ids = &req.flow_id_0; |
| int rc, i; |
| |
| bnxt_hwrm_cmd_hdr_init(bp, &req, HWRM_CFA_FLOW_STATS, -1, -1); |
| req.num_flows = cpu_to_le16(num_flows); |
| for (i = 0; i < num_flows; i++) { |
| struct bnxt_tc_flow_node *flow_node = stats_batch[i].flow_node; |
| |
| bnxt_fill_cfa_stats_req(bp, flow_node, |
| &req_flow_handles[i], &req_flow_ids[i]); |
| } |
| |
| mutex_lock(&bp->hwrm_cmd_lock); |
| rc = _hwrm_send_message(bp, &req, sizeof(req), HWRM_CMD_TIMEOUT); |
| if (!rc) { |
| __le64 *resp_packets; |
| __le64 *resp_bytes; |
| |
| resp = bnxt_get_hwrm_resp_addr(bp, &req); |
| resp_packets = &resp->packet_0; |
| resp_bytes = &resp->byte_0; |
| |
| for (i = 0; i < num_flows; i++) { |
| stats_batch[i].hw_stats.packets = |
| le64_to_cpu(resp_packets[i]); |
| stats_batch[i].hw_stats.bytes = |
| le64_to_cpu(resp_bytes[i]); |
| } |
| } else { |
| netdev_info(bp->dev, "error rc=%d", rc); |
| } |
| mutex_unlock(&bp->hwrm_cmd_lock); |
| |
| if (rc) |
| rc = -EIO; |
| return rc; |
| } |
| |
| /* Add val to accum while handling a possible wraparound |
| * of val. Eventhough val is of type u64, its actual width |
| * is denoted by mask and will wrap-around beyond that width. |
| */ |
| static void accumulate_val(u64 *accum, u64 val, u64 mask) |
| { |
| #define low_bits(x, mask) ((x) & (mask)) |
| #define high_bits(x, mask) ((x) & ~(mask)) |
| bool wrapped = val < low_bits(*accum, mask); |
| |
| *accum = high_bits(*accum, mask) + val; |
| if (wrapped) |
| *accum += (mask + 1); |
| } |
| |
| /* The HW counters' width is much less than 64bits. |
| * Handle possible wrap-around while updating the stat counters |
| */ |
| static void bnxt_flow_stats_accum(struct bnxt_tc_info *tc_info, |
| struct bnxt_tc_flow_stats *acc_stats, |
| struct bnxt_tc_flow_stats *hw_stats) |
| { |
| accumulate_val(&acc_stats->bytes, hw_stats->bytes, tc_info->bytes_mask); |
| accumulate_val(&acc_stats->packets, hw_stats->packets, |
| tc_info->packets_mask); |
| } |
| |
| static int |
| bnxt_tc_flow_stats_batch_update(struct bnxt *bp, int num_flows, |
| struct bnxt_tc_stats_batch stats_batch[]) |
| { |
| struct bnxt_tc_info *tc_info = bp->tc_info; |
| int rc, i; |
| |
| rc = bnxt_hwrm_cfa_flow_stats_get(bp, num_flows, stats_batch); |
| if (rc) |
| return rc; |
| |
| for (i = 0; i < num_flows; i++) { |
| struct bnxt_tc_flow_node *flow_node = stats_batch[i].flow_node; |
| struct bnxt_tc_flow *flow = &flow_node->flow; |
| |
| spin_lock(&flow->stats_lock); |
| bnxt_flow_stats_accum(tc_info, &flow->stats, |
| &stats_batch[i].hw_stats); |
| if (flow->stats.packets != flow->prev_stats.packets) |
| flow->lastused = jiffies; |
| spin_unlock(&flow->stats_lock); |
| } |
| |
| return 0; |
| } |
| |
| static int |
| bnxt_tc_flow_stats_batch_prep(struct bnxt *bp, |
| struct bnxt_tc_stats_batch stats_batch[], |
| int *num_flows) |
| { |
| struct bnxt_tc_info *tc_info = bp->tc_info; |
| struct rhashtable_iter *iter = &tc_info->iter; |
| void *flow_node; |
| int rc, i; |
| |
| rhashtable_walk_start(iter); |
| |
| rc = 0; |
| for (i = 0; i < BNXT_FLOW_STATS_BATCH_MAX; i++) { |
| flow_node = rhashtable_walk_next(iter); |
| if (IS_ERR(flow_node)) { |
| i = 0; |
| if (PTR_ERR(flow_node) == -EAGAIN) { |
| continue; |
| } else { |
| rc = PTR_ERR(flow_node); |
| goto done; |
| } |
| } |
| |
| /* No more flows */ |
| if (!flow_node) |
| goto done; |
| |
| stats_batch[i].flow_node = flow_node; |
| } |
| done: |
| rhashtable_walk_stop(iter); |
| *num_flows = i; |
| return rc; |
| } |
| |
| void bnxt_tc_flow_stats_work(struct bnxt *bp) |
| { |
| struct bnxt_tc_info *tc_info = bp->tc_info; |
| int num_flows, rc; |
| |
| num_flows = atomic_read(&tc_info->flow_table.nelems); |
| if (!num_flows) |
| return; |
| |
| rhashtable_walk_enter(&tc_info->flow_table, &tc_info->iter); |
| |
| for (;;) { |
| rc = bnxt_tc_flow_stats_batch_prep(bp, tc_info->stats_batch, |
| &num_flows); |
| if (rc) { |
| if (rc == -EAGAIN) |
| continue; |
| break; |
| } |
| |
| if (!num_flows) |
| break; |
| |
| bnxt_tc_flow_stats_batch_update(bp, num_flows, |
| tc_info->stats_batch); |
| } |
| |
| rhashtable_walk_exit(&tc_info->iter); |
| } |
| |
| int bnxt_tc_setup_flower(struct bnxt *bp, u16 src_fid, |
| struct tc_cls_flower_offload *cls_flower) |
| { |
| switch (cls_flower->command) { |
| case TC_CLSFLOWER_REPLACE: |
| return bnxt_tc_add_flow(bp, src_fid, cls_flower); |
| case TC_CLSFLOWER_DESTROY: |
| return bnxt_tc_del_flow(bp, cls_flower); |
| case TC_CLSFLOWER_STATS: |
| return bnxt_tc_get_flow_stats(bp, cls_flower); |
| default: |
| return -EOPNOTSUPP; |
| } |
| } |
| |
| static const struct rhashtable_params bnxt_tc_flow_ht_params = { |
| .head_offset = offsetof(struct bnxt_tc_flow_node, node), |
| .key_offset = offsetof(struct bnxt_tc_flow_node, cookie), |
| .key_len = sizeof(((struct bnxt_tc_flow_node *)0)->cookie), |
| .automatic_shrinking = true |
| }; |
| |
| static const struct rhashtable_params bnxt_tc_l2_ht_params = { |
| .head_offset = offsetof(struct bnxt_tc_l2_node, node), |
| .key_offset = offsetof(struct bnxt_tc_l2_node, key), |
| .key_len = BNXT_TC_L2_KEY_LEN, |
| .automatic_shrinking = true |
| }; |
| |
| static const struct rhashtable_params bnxt_tc_decap_l2_ht_params = { |
| .head_offset = offsetof(struct bnxt_tc_l2_node, node), |
| .key_offset = offsetof(struct bnxt_tc_l2_node, key), |
| .key_len = BNXT_TC_L2_KEY_LEN, |
| .automatic_shrinking = true |
| }; |
| |
| static const struct rhashtable_params bnxt_tc_tunnel_ht_params = { |
| .head_offset = offsetof(struct bnxt_tc_tunnel_node, node), |
| .key_offset = offsetof(struct bnxt_tc_tunnel_node, key), |
| .key_len = sizeof(struct ip_tunnel_key), |
| .automatic_shrinking = true |
| }; |
| |
| /* convert counter width in bits to a mask */ |
| #define mask(width) ((u64)~0 >> (64 - (width))) |
| |
| int bnxt_init_tc(struct bnxt *bp) |
| { |
| struct bnxt_tc_info *tc_info; |
| int rc; |
| |
| if (bp->hwrm_spec_code < 0x10803) { |
| netdev_warn(bp->dev, |
| "Firmware does not support TC flower offload.\n"); |
| return -ENOTSUPP; |
| } |
| |
| tc_info = kzalloc(sizeof(*tc_info), GFP_KERNEL); |
| if (!tc_info) |
| return -ENOMEM; |
| mutex_init(&tc_info->lock); |
| |
| /* Counter widths are programmed by FW */ |
| tc_info->bytes_mask = mask(36); |
| tc_info->packets_mask = mask(28); |
| |
| tc_info->flow_ht_params = bnxt_tc_flow_ht_params; |
| rc = rhashtable_init(&tc_info->flow_table, &tc_info->flow_ht_params); |
| if (rc) |
| goto free_tc_info; |
| |
| tc_info->l2_ht_params = bnxt_tc_l2_ht_params; |
| rc = rhashtable_init(&tc_info->l2_table, &tc_info->l2_ht_params); |
| if (rc) |
| goto destroy_flow_table; |
| |
| tc_info->decap_l2_ht_params = bnxt_tc_decap_l2_ht_params; |
| rc = rhashtable_init(&tc_info->decap_l2_table, |
| &tc_info->decap_l2_ht_params); |
| if (rc) |
| goto destroy_l2_table; |
| |
| tc_info->decap_ht_params = bnxt_tc_tunnel_ht_params; |
| rc = rhashtable_init(&tc_info->decap_table, |
| &tc_info->decap_ht_params); |
| if (rc) |
| goto destroy_decap_l2_table; |
| |
| tc_info->encap_ht_params = bnxt_tc_tunnel_ht_params; |
| rc = rhashtable_init(&tc_info->encap_table, |
| &tc_info->encap_ht_params); |
| if (rc) |
| goto destroy_decap_table; |
| |
| tc_info->enabled = true; |
| bp->dev->hw_features |= NETIF_F_HW_TC; |
| bp->dev->features |= NETIF_F_HW_TC; |
| bp->tc_info = tc_info; |
| return 0; |
| |
| destroy_decap_table: |
| rhashtable_destroy(&tc_info->decap_table); |
| destroy_decap_l2_table: |
| rhashtable_destroy(&tc_info->decap_l2_table); |
| destroy_l2_table: |
| rhashtable_destroy(&tc_info->l2_table); |
| destroy_flow_table: |
| rhashtable_destroy(&tc_info->flow_table); |
| free_tc_info: |
| kfree(tc_info); |
| return rc; |
| } |
| |
| void bnxt_shutdown_tc(struct bnxt *bp) |
| { |
| struct bnxt_tc_info *tc_info = bp->tc_info; |
| |
| if (!bnxt_tc_flower_enabled(bp)) |
| return; |
| |
| rhashtable_destroy(&tc_info->flow_table); |
| rhashtable_destroy(&tc_info->l2_table); |
| rhashtable_destroy(&tc_info->decap_l2_table); |
| rhashtable_destroy(&tc_info->decap_table); |
| rhashtable_destroy(&tc_info->encap_table); |
| kfree(tc_info); |
| bp->tc_info = NULL; |
| } |