diff options
Diffstat (limited to 'drivers/net/ethernet/chelsio/cxgb4/cxgb4_tc_flower.c')
| -rw-r--r-- | drivers/net/ethernet/chelsio/cxgb4/cxgb4_tc_flower.c | 876 |
1 files changed, 876 insertions, 0 deletions
diff --git a/drivers/net/ethernet/chelsio/cxgb4/cxgb4_tc_flower.c b/drivers/net/ethernet/chelsio/cxgb4/cxgb4_tc_flower.c new file mode 100644 index 000000000000..d4a548a6a55c --- /dev/null +++ b/drivers/net/ethernet/chelsio/cxgb4/cxgb4_tc_flower.c @@ -0,0 +1,876 @@ +/* + * This file is part of the Chelsio T4/T5/T6 Ethernet driver for Linux. + * + * Copyright (c) 2017 Chelsio Communications, Inc. All rights reserved. + * + * This software is available to you under a choice of one of two + * licenses. You may choose to be licensed under the terms of the GNU + * General Public License (GPL) Version 2, available from the file + * COPYING in the main directory of this source tree, or the + * OpenIB.org BSD license below: + * + * Redistribution and use in source and binary forms, with or + * without modification, are permitted provided that the following + * conditions are met: + * + * - Redistributions of source code must retain the above + * copyright notice, this list of conditions and the following + * disclaimer. + * + * - 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 <net/tc_act/tc_mirred.h> +#include <net/tc_act/tc_pedit.h> +#include <net/tc_act/tc_gact.h> +#include <net/tc_act/tc_vlan.h> + +#include "cxgb4.h" +#include "cxgb4_filter.h" +#include "cxgb4_tc_flower.h" + +#define STATS_CHECK_PERIOD (HZ / 2) + +struct ch_tc_pedit_fields pedits[] = { + PEDIT_FIELDS(ETH_, DMAC_31_0, 4, dmac, 0), + PEDIT_FIELDS(ETH_, DMAC_47_32, 2, dmac, 4), + PEDIT_FIELDS(ETH_, SMAC_15_0, 2, smac, 0), + PEDIT_FIELDS(ETH_, SMAC_47_16, 4, smac, 2), + PEDIT_FIELDS(IP4_, SRC, 4, nat_fip, 0), + PEDIT_FIELDS(IP4_, DST, 4, nat_lip, 0), + PEDIT_FIELDS(IP6_, SRC_31_0, 4, nat_fip, 0), + PEDIT_FIELDS(IP6_, SRC_63_32, 4, nat_fip, 4), + PEDIT_FIELDS(IP6_, SRC_95_64, 4, nat_fip, 8), + PEDIT_FIELDS(IP6_, SRC_127_96, 4, nat_fip, 12), + PEDIT_FIELDS(IP6_, DST_31_0, 4, nat_lip, 0), + PEDIT_FIELDS(IP6_, DST_63_32, 4, nat_lip, 4), + PEDIT_FIELDS(IP6_, DST_95_64, 4, nat_lip, 8), + PEDIT_FIELDS(IP6_, DST_127_96, 4, nat_lip, 12), + PEDIT_FIELDS(TCP_, SPORT, 2, nat_fport, 0), + PEDIT_FIELDS(TCP_, DPORT, 2, nat_lport, 0), + PEDIT_FIELDS(UDP_, SPORT, 2, nat_fport, 0), + PEDIT_FIELDS(UDP_, DPORT, 2, nat_lport, 0), +}; + +static struct ch_tc_flower_entry *allocate_flower_entry(void) +{ + struct ch_tc_flower_entry *new = kzalloc(sizeof(*new), GFP_KERNEL); + spin_lock_init(&new->lock); + return new; +} + +/* Must be called with either RTNL or rcu_read_lock */ +static struct ch_tc_flower_entry *ch_flower_lookup(struct adapter *adap, + unsigned long flower_cookie) +{ + return rhashtable_lookup_fast(&adap->flower_tbl, &flower_cookie, + adap->flower_ht_params); +} + +static void cxgb4_process_flow_match(struct net_device *dev, + struct tc_cls_flower_offload *cls, + struct ch_filter_specification *fs) +{ + u16 addr_type = 0; + + if (dissector_uses_key(cls->dissector, FLOW_DISSECTOR_KEY_CONTROL)) { + struct flow_dissector_key_control *key = + skb_flow_dissector_target(cls->dissector, + FLOW_DISSECTOR_KEY_CONTROL, + cls->key); + + addr_type = key->addr_type; + } + + if (dissector_uses_key(cls->dissector, FLOW_DISSECTOR_KEY_BASIC)) { + struct flow_dissector_key_basic *key = + skb_flow_dissector_target(cls->dissector, + FLOW_DISSECTOR_KEY_BASIC, + cls->key); + struct flow_dissector_key_basic *mask = + skb_flow_dissector_target(cls->dissector, + FLOW_DISSECTOR_KEY_BASIC, + cls->mask); + u16 ethtype_key = ntohs(key->n_proto); + u16 ethtype_mask = ntohs(mask->n_proto); + + if (ethtype_key == ETH_P_ALL) { + ethtype_key = 0; + ethtype_mask = 0; + } + + fs->val.ethtype = ethtype_key; + fs->mask.ethtype = ethtype_mask; + fs->val.proto = key->ip_proto; + fs->mask.proto = mask->ip_proto; + } + + if (addr_type == FLOW_DISSECTOR_KEY_IPV4_ADDRS) { + struct flow_dissector_key_ipv4_addrs *key = + skb_flow_dissector_target(cls->dissector, + FLOW_DISSECTOR_KEY_IPV4_ADDRS, + cls->key); + struct flow_dissector_key_ipv4_addrs *mask = + skb_flow_dissector_target(cls->dissector, + FLOW_DISSECTOR_KEY_IPV4_ADDRS, + cls->mask); + fs->type = 0; + memcpy(&fs->val.lip[0], &key->dst, sizeof(key->dst)); + memcpy(&fs->val.fip[0], &key->src, sizeof(key->src)); + memcpy(&fs->mask.lip[0], &mask->dst, sizeof(mask->dst)); + memcpy(&fs->mask.fip[0], &mask->src, sizeof(mask->src)); + + /* also initialize nat_lip/fip to same values */ + memcpy(&fs->nat_lip[0], &key->dst, sizeof(key->dst)); + memcpy(&fs->nat_fip[0], &key->src, sizeof(key->src)); + + } + + if (addr_type == FLOW_DISSECTOR_KEY_IPV6_ADDRS) { + struct flow_dissector_key_ipv6_addrs *key = + skb_flow_dissector_target(cls->dissector, + FLOW_DISSECTOR_KEY_IPV6_ADDRS, + cls->key); + struct flow_dissector_key_ipv6_addrs *mask = + skb_flow_dissector_target(cls->dissector, + FLOW_DISSECTOR_KEY_IPV6_ADDRS, + cls->mask); + + fs->type = 1; + memcpy(&fs->val.lip[0], key->dst.s6_addr, sizeof(key->dst)); + memcpy(&fs->val.fip[0], key->src.s6_addr, sizeof(key->src)); + memcpy(&fs->mask.lip[0], mask->dst.s6_addr, sizeof(mask->dst)); + memcpy(&fs->mask.fip[0], mask->src.s6_addr, sizeof(mask->src)); + + /* also initialize nat_lip/fip to same values */ + memcpy(&fs->nat_lip[0], key->dst.s6_addr, sizeof(key->dst)); + memcpy(&fs->nat_fip[0], key->src.s6_addr, sizeof(key->src)); + } + + if (dissector_uses_key(cls->dissector, FLOW_DISSECTOR_KEY_PORTS)) { + struct flow_dissector_key_ports *key, *mask; + + key = skb_flow_dissector_target(cls->dissector, + FLOW_DISSECTOR_KEY_PORTS, + cls->key); + mask = skb_flow_dissector_target(cls->dissector, + FLOW_DISSECTOR_KEY_PORTS, + cls->mask); + fs->val.lport = cpu_to_be16(key->dst); + fs->mask.lport = cpu_to_be16(mask->dst); + fs->val.fport = cpu_to_be16(key->src); + fs->mask.fport = cpu_to_be16(mask->src); + + /* also initialize nat_lport/fport to same values */ + fs->nat_lport = cpu_to_be16(key->dst); + fs->nat_fport = cpu_to_be16(key->src); + } + + if (dissector_uses_key(cls->dissector, FLOW_DISSECTOR_KEY_IP)) { + struct flow_dissector_key_ip *key, *mask; + + key = skb_flow_dissector_target(cls->dissector, + FLOW_DISSECTOR_KEY_IP, + cls->key); + mask = skb_flow_dissector_target(cls->dissector, + FLOW_DISSECTOR_KEY_IP, + cls->mask); + fs->val.tos = key->tos; + fs->mask.tos = mask->tos; + } + + if (dissector_uses_key(cls->dissector, FLOW_DISSECTOR_KEY_VLAN)) { + struct flow_dissector_key_vlan *key, *mask; + u16 vlan_tci, vlan_tci_mask; + + key = skb_flow_dissector_target(cls->dissector, + FLOW_DISSECTOR_KEY_VLAN, + cls->key); + mask = skb_flow_dissector_target(cls->dissector, + FLOW_DISSECTOR_KEY_VLAN, + cls->mask); + vlan_tci = key->vlan_id | (key->vlan_priority << + VLAN_PRIO_SHIFT); + vlan_tci_mask = mask->vlan_id | (mask->vlan_priority << + VLAN_PRIO_SHIFT); + fs->val.ivlan = cpu_to_be16(vlan_tci); + fs->mask.ivlan = cpu_to_be16(vlan_tci_mask); + + /* Chelsio adapters use ivlan_vld bit to match vlan packets + * as 802.1Q. Also, when vlan tag is present in packets, + * ethtype match is used then to match on ethtype of inner + * header ie. the header following the vlan header. + * So, set the ivlan_vld based on ethtype info supplied by + * TC for vlan packets if its 802.1Q. And then reset the + * ethtype value else, hw will try to match the supplied + * ethtype value with ethtype of inner header. + */ + if (fs->val.ethtype == ETH_P_8021Q) { + fs->val.ivlan_vld = 1; + fs->mask.ivlan_vld = 1; + fs->val.ethtype = 0; + fs->mask.ethtype = 0; + } + } + + /* Match only packets coming from the ingress port where this + * filter will be created. + */ + fs->val.iport = netdev2pinfo(dev)->port_id; + fs->mask.iport = ~0; +} + +static int cxgb4_validate_flow_match(struct net_device *dev, + struct tc_cls_flower_offload *cls) +{ + u16 ethtype_mask = 0; + u16 ethtype_key = 0; + + if (cls->dissector->used_keys & + ~(BIT(FLOW_DISSECTOR_KEY_CONTROL) | + BIT(FLOW_DISSECTOR_KEY_BASIC) | + BIT(FLOW_DISSECTOR_KEY_IPV4_ADDRS) | + BIT(FLOW_DISSECTOR_KEY_IPV6_ADDRS) | + BIT(FLOW_DISSECTOR_KEY_PORTS) | + BIT(FLOW_DISSECTOR_KEY_VLAN) | + BIT(FLOW_DISSECTOR_KEY_IP))) { + netdev_warn(dev, "Unsupported key used: 0x%x\n", + cls->dissector->used_keys); + return -EOPNOTSUPP; + } + + if (dissector_uses_key(cls->dissector, FLOW_DISSECTOR_KEY_BASIC)) { + struct flow_dissector_key_basic *key = + skb_flow_dissector_target(cls->dissector, + FLOW_DISSECTOR_KEY_BASIC, + cls->key); + struct flow_dissector_key_basic *mask = + skb_flow_dissector_target(cls->dissector, + FLOW_DISSECTOR_KEY_BASIC, + cls->mask); + ethtype_key = ntohs(key->n_proto); + ethtype_mask = ntohs(mask->n_proto); + } + + if (dissector_uses_key(cls->dissector, FLOW_DISSECTOR_KEY_IP)) { + u16 eth_ip_type = ethtype_key & ethtype_mask; + struct flow_dissector_key_ip *mask; + + if (eth_ip_type != ETH_P_IP && eth_ip_type != ETH_P_IPV6) { + netdev_err(dev, "IP Key supported only with IPv4/v6"); + return -EINVAL; + } + + mask = skb_flow_dissector_target(cls->dissector, + FLOW_DISSECTOR_KEY_IP, + cls->mask); + if (mask->ttl) { + netdev_warn(dev, "ttl match unsupported for offload"); + return -EOPNOTSUPP; + } + } + + return 0; +} + +static void offload_pedit(struct ch_filter_specification *fs, u32 val, u32 mask, + u8 field) +{ + u32 set_val = val & ~mask; + u32 offset = 0; + u8 size = 1; + int i; + + for (i = 0; i < ARRAY_SIZE(pedits); i++) { + if (pedits[i].field == field) { + offset = pedits[i].offset; + size = pedits[i].size; + break; + } + } + memcpy((u8 *)fs + offset, &set_val, size); +} + +static void process_pedit_field(struct ch_filter_specification *fs, u32 val, + u32 mask, u32 offset, u8 htype) +{ + switch (htype) { + case TCA_PEDIT_KEY_EX_HDR_TYPE_ETH: + switch (offset) { + case PEDIT_ETH_DMAC_31_0: + fs->newdmac = 1; + offload_pedit(fs, val, mask, ETH_DMAC_31_0); + break; + case PEDIT_ETH_DMAC_47_32_SMAC_15_0: + if (~mask & PEDIT_ETH_DMAC_MASK) + offload_pedit(fs, val, mask, ETH_DMAC_47_32); + else + offload_pedit(fs, val >> 16, mask >> 16, + ETH_SMAC_15_0); + break; + case PEDIT_ETH_SMAC_47_16: + fs->newsmac = 1; + offload_pedit(fs, val, mask, ETH_SMAC_47_16); + } + break; + case TCA_PEDIT_KEY_EX_HDR_TYPE_IP4: + switch (offset) { + case PEDIT_IP4_SRC: + offload_pedit(fs, val, mask, IP4_SRC); + break; + case PEDIT_IP4_DST: + offload_pedit(fs, val, mask, IP4_DST); + } + fs->nat_mode = NAT_MODE_ALL; + break; + case TCA_PEDIT_KEY_EX_HDR_TYPE_IP6: + switch (offset) { + case PEDIT_IP6_SRC_31_0: + offload_pedit(fs, val, mask, IP6_SRC_31_0); + break; + case PEDIT_IP6_SRC_63_32: + offload_pedit(fs, val, mask, IP6_SRC_63_32); + break; + case PEDIT_IP6_SRC_95_64: + offload_pedit(fs, val, mask, IP6_SRC_95_64); + break; + case PEDIT_IP6_SRC_127_96: + offload_pedit(fs, val, mask, IP6_SRC_127_96); + break; + case PEDIT_IP6_DST_31_0: + offload_pedit(fs, val, mask, IP6_DST_31_0); + break; + case PEDIT_IP6_DST_63_32: + offload_pedit(fs, val, mask, IP6_DST_63_32); + break; + case PEDIT_IP6_DST_95_64: + offload_pedit(fs, val, mask, IP6_DST_95_64); + break; + case PEDIT_IP6_DST_127_96: + offload_pedit(fs, val, mask, IP6_DST_127_96); + } + fs->nat_mode = NAT_MODE_ALL; + break; + case TCA_PEDIT_KEY_EX_HDR_TYPE_TCP: + switch (offset) { + case PEDIT_TCP_SPORT_DPORT: + if (~mask & PEDIT_TCP_UDP_SPORT_MASK) + offload_pedit(fs, cpu_to_be32(val) >> 16, + cpu_to_be32(mask) >> 16, + TCP_SPORT); + else + offload_pedit(fs, cpu_to_be32(val), + cpu_to_be32(mask), TCP_DPORT); + } + fs->nat_mode = NAT_MODE_ALL; + break; + case TCA_PEDIT_KEY_EX_HDR_TYPE_UDP: + switch (offset) { + case PEDIT_UDP_SPORT_DPORT: + if (~mask & PEDIT_TCP_UDP_SPORT_MASK) + offload_pedit(fs, cpu_to_be32(val) >> 16, + cpu_to_be32(mask) >> 16, + UDP_SPORT); + else + offload_pedit(fs, cpu_to_be32(val), + cpu_to_be32(mask), UDP_DPORT); + } + fs->nat_mode = NAT_MODE_ALL; + } +} + +static void cxgb4_process_flow_actions(struct net_device *in, + struct tc_cls_flower_offload *cls, + struct ch_filter_specification *fs) +{ + const struct tc_action *a; + LIST_HEAD(actions); + + tcf_exts_to_list(cls->exts, &actions); + list_for_each_entry(a, &actions, list) { + if (is_tcf_gact_ok(a)) { + fs->action = FILTER_PASS; + } else if (is_tcf_gact_shot(a)) { + fs->action = FILTER_DROP; + } else if (is_tcf_mirred_egress_redirect(a)) { + int ifindex = tcf_mirred_ifindex(a); + struct net_device *out = __dev_get_by_index(dev_net(in), + ifindex); + struct port_info *pi = netdev_priv(out); + + fs->action = FILTER_SWITCH; + fs->eport = pi->port_id; + } else if (is_tcf_vlan(a)) { + u32 vlan_action = tcf_vlan_action(a); + u8 prio = tcf_vlan_push_prio(a); + u16 vid = tcf_vlan_push_vid(a); + u16 vlan_tci = (prio << VLAN_PRIO_SHIFT) | vid; + + switch (vlan_action) { + case TCA_VLAN_ACT_POP: + fs->newvlan |= VLAN_REMOVE; + break; + case TCA_VLAN_ACT_PUSH: + fs->newvlan |= VLAN_INSERT; + fs->vlan = vlan_tci; + break; + case TCA_VLAN_ACT_MODIFY: + fs->newvlan |= VLAN_REWRITE; + fs->vlan = vlan_tci; + break; + default: + break; + } + } else if (is_tcf_pedit(a)) { + u32 mask, val, offset; + int nkeys, i; + u8 htype; + + nkeys = tcf_pedit_nkeys(a); + for (i = 0; i < nkeys; i++) { + htype = tcf_pedit_htype(a, i); + mask = tcf_pedit_mask(a, i); + val = tcf_pedit_val(a, i); + offset = tcf_pedit_offset(a, i); + + process_pedit_field(fs, val, mask, offset, + htype); + } + } + } +} + +static bool valid_l4_mask(u32 mask) +{ + u16 hi, lo; + + /* Either the upper 16-bits (SPORT) OR the lower + * 16-bits (DPORT) can be set, but NOT BOTH. + */ + hi = (mask >> 16) & 0xFFFF; + lo = mask & 0xFFFF; + + return hi && lo ? false : true; +} + +static bool valid_pedit_action(struct net_device *dev, + const struct tc_action *a) +{ + u32 mask, offset; + u8 cmd, htype; + int nkeys, i; + + nkeys = tcf_pedit_nkeys(a); + for (i = 0; i < nkeys; i++) { + htype = tcf_pedit_htype(a, i); + cmd = tcf_pedit_cmd(a, i); + mask = tcf_pedit_mask(a, i); + offset = tcf_pedit_offset(a, i); + + if (cmd != TCA_PEDIT_KEY_EX_CMD_SET) { + netdev_err(dev, "%s: Unsupported pedit cmd\n", + __func__); + return false; + } + + switch (htype) { + case TCA_PEDIT_KEY_EX_HDR_TYPE_ETH: + switch (offset) { + case PEDIT_ETH_DMAC_31_0: + case PEDIT_ETH_DMAC_47_32_SMAC_15_0: + case PEDIT_ETH_SMAC_47_16: + break; + default: + netdev_err(dev, "%s: Unsupported pedit field\n", + __func__); + return false; + } + break; + case TCA_PEDIT_KEY_EX_HDR_TYPE_IP4: + switch (offset) { + case PEDIT_IP4_SRC: + case PEDIT_IP4_DST: + break; + default: + netdev_err(dev, "%s: Unsupported pedit field\n", + __func__); + return false; + } + break; + case TCA_PEDIT_KEY_EX_HDR_TYPE_IP6: + switch (offset) { + case PEDIT_IP6_SRC_31_0: + case PEDIT_IP6_SRC_63_32: + case PEDIT_IP6_SRC_95_64: + case PEDIT_IP6_SRC_127_96: + case PEDIT_IP6_DST_31_0: + case PEDIT_IP6_DST_63_32: + case PEDIT_IP6_DST_95_64: + case PEDIT_IP6_DST_127_96: + break; + default: + netdev_err(dev, "%s: Unsupported pedit field\n", + __func__); + return false; + } + break; + case TCA_PEDIT_KEY_EX_HDR_TYPE_TCP: + switch (offset) { + case PEDIT_TCP_SPORT_DPORT: + if (!valid_l4_mask(~mask)) { + netdev_err(dev, "%s: Unsupported mask for TCP L4 ports\n", + __func__); + return false; + } + break; + default: + netdev_err(dev, "%s: Unsupported pedit field\n", + __func__); + return false; + } + break; + case TCA_PEDIT_KEY_EX_HDR_TYPE_UDP: + switch (offset) { + case PEDIT_UDP_SPORT_DPORT: + if (!valid_l4_mask(~mask)) { + netdev_err(dev, "%s: Unsupported mask for UDP L4 ports\n", + __func__); + return false; + } + break; + default: + netdev_err(dev, "%s: Unsupported pedit field\n", + __func__); + return false; + } + break; + default: + netdev_err(dev, "%s: Unsupported pedit type\n", + __func__); + return false; + } + } + return true; +} + +static int cxgb4_validate_flow_actions(struct net_device *dev, + struct tc_cls_flower_offload *cls) +{ + const struct tc_action *a; + bool act_redir = false; + bool act_pedit = false; + bool act_vlan = false; + LIST_HEAD(actions); + + tcf_exts_to_list(cls->exts, &actions); + list_for_each_entry(a, &actions, list) { + if (is_tcf_gact_ok(a)) { + /* Do nothing */ + } else if (is_tcf_gact_shot(a)) { + /* Do nothing */ + } else if (is_tcf_mirred_egress_redirect(a)) { + struct adapter *adap = netdev2adap(dev); + struct net_device *n_dev; + unsigned int i, ifindex; + bool found = false; + + ifindex = tcf_mirred_ifindex(a); + for_each_port(adap, i) { + n_dev = adap->port[i]; + if (ifindex == n_dev->ifindex) { + found = true; + break; + } + } + + /* If interface doesn't belong to our hw, then + * the provided output port is not valid + */ + if (!found) { + netdev_err(dev, "%s: Out port invalid\n", + __func__); + return -EINVAL; + } + act_redir = true; + } else if (is_tcf_vlan(a)) { + u16 proto = be16_to_cpu(tcf_vlan_push_proto(a)); + u32 vlan_action = tcf_vlan_action(a); + + switch (vlan_action) { + case TCA_VLAN_ACT_POP: + break; + case TCA_VLAN_ACT_PUSH: + case TCA_VLAN_ACT_MODIFY: + if (proto != ETH_P_8021Q) { + netdev_err(dev, "%s: Unsupported vlan proto\n", + __func__); + return -EOPNOTSUPP; + } + break; + default: + netdev_err(dev, "%s: Unsupported vlan action\n", + __func__); + return -EOPNOTSUPP; + } + act_vlan = true; + } else if (is_tcf_pedit(a)) { + bool pedit_valid = valid_pedit_action(dev, a); + + if (!pedit_valid) + return -EOPNOTSUPP; + act_pedit = true; + } else { + netdev_err(dev, "%s: Unsupported action\n", __func__); + return -EOPNOTSUPP; + } + } + + if ((act_pedit || act_vlan) && !act_redir) { + netdev_err(dev, "%s: pedit/vlan rewrite invalid without egress redirect\n", + __func__); + return -EINVAL; + } + + return 0; +} + +int cxgb4_tc_flower_replace(struct net_device *dev, + struct tc_cls_flower_offload *cls) +{ + struct adapter *adap = netdev2adap(dev); + struct ch_tc_flower_entry *ch_flower; + struct ch_filter_specification *fs; + struct filter_ctx ctx; + int fidx; + int ret; + + if (cxgb4_validate_flow_actions(dev, cls)) + return -EOPNOTSUPP; + + if (cxgb4_validate_flow_match(dev, cls)) + return -EOPNOTSUPP; + + ch_flower = allocate_flower_entry(); + if (!ch_flower) { + netdev_err(dev, "%s: ch_flower alloc failed.\n", __func__); + return -ENOMEM; + } + + fs = &ch_flower->fs; + fs->hitcnts = 1; + cxgb4_process_flow_match(dev, cls, fs); + cxgb4_process_flow_actions(dev, cls, fs); + + fs->hash = is_filter_exact_match(adap, fs); + if (fs->hash) { + fidx = 0; + } else { + fidx = cxgb4_get_free_ftid(dev, fs->type ? PF_INET6 : PF_INET); + if (fidx < 0) { + netdev_err(dev, "%s: No fidx for offload.\n", __func__); + ret = -ENOMEM; + goto free_entry; + } + } + + init_completion(&ctx.completion); + ret = __cxgb4_set_filter(dev, fidx, fs, &ctx); + if (ret) { + netdev_err(dev, "%s: filter creation err %d\n", + __func__, ret); + goto free_entry; + } + + /* Wait for reply */ + ret = wait_for_completion_timeout(&ctx.completion, 10 * HZ); + if (!ret) { + ret = -ETIMEDOUT; + goto free_entry; + } + + ret = ctx.result; + /* Check if hw returned error for filter creation */ + if (ret) { + netdev_err(dev, "%s: filter creation err %d\n", + __func__, ret); + goto free_entry; + } + + ch_flower->tc_flower_cookie = cls->cookie; + ch_flower->filter_id = ctx.tid; + ret = rhashtable_insert_fast(&adap->flower_tbl, &ch_flower->node, + adap->flower_ht_params); + if (ret) + goto del_filter; + + return 0; + +del_filter: + cxgb4_del_filter(dev, ch_flower->filter_id, &ch_flower->fs); + +free_entry: + kfree(ch_flower); + return ret; +} + +int cxgb4_tc_flower_destroy(struct net_device *dev, + struct tc_cls_flower_offload *cls) +{ + struct adapter *adap = netdev2adap(dev); + struct ch_tc_flower_entry *ch_flower; + int ret; + + ch_flower = ch_flower_lookup(adap, cls->cookie); + if (!ch_flower) + return -ENOENT; + + ret = cxgb4_del_filter(dev, ch_flower->filter_id, &ch_flower->fs); + if (ret) + goto err; + + ret = rhashtable_remove_fast(&adap->flower_tbl, &ch_flower->node, + adap->flower_ht_params); + if (ret) { + netdev_err(dev, "Flow remove from rhashtable failed"); + goto err; + } + kfree_rcu(ch_flower, rcu); + +err: + return ret; +} + +static void ch_flower_stats_handler(struct work_struct *work) +{ + struct adapter *adap = container_of(work, struct adapter, + flower_stats_work); + struct ch_tc_flower_entry *flower_entry; + struct ch_tc_flower_stats *ofld_stats; + struct rhashtable_iter iter; + u64 packets; + u64 bytes; + int ret; + + rhashtable_walk_enter(&adap->flower_tbl, &iter); + do { + flower_entry = ERR_PTR(rhashtable_walk_start(&iter)); + if (IS_ERR(flower_entry)) + goto walk_stop; + + while ((flower_entry = rhashtable_walk_next(&iter)) && + !IS_ERR(flower_entry)) { + ret = cxgb4_get_filter_counters(adap->port[0], + flower_entry->filter_id, + &packets, &bytes, + flower_entry->fs.hash); + if (!ret) { + spin_lock(&flower_entry->lock); + ofld_stats = &flower_entry->stats; + + if (ofld_stats->prev_packet_count != packets) { + ofld_stats->prev_packet_count = packets; + ofld_stats->last_used = jiffies; + } + spin_unlock(&flower_entry->lock); + } + } +walk_stop: + rhashtable_walk_stop(&iter); + } while (flower_entry == ERR_PTR(-EAGAIN)); + rhashtable_walk_exit(&iter); + mod_timer(&adap->flower_stats_timer, jiffies + STATS_CHECK_PERIOD); +} + +static void ch_flower_stats_cb(struct timer_list *t) +{ + struct adapter *adap = from_timer(adap, t, flower_stats_timer); + + schedule_work(&adap->flower_stats_work); +} + +int cxgb4_tc_flower_stats(struct net_device *dev, + struct tc_cls_flower_offload *cls) +{ + struct adapter *adap = netdev2adap(dev); + struct ch_tc_flower_stats *ofld_stats; + struct ch_tc_flower_entry *ch_flower; + u64 packets; + u64 bytes; + int ret; + + ch_flower = ch_flower_lookup(adap, cls->cookie); + if (!ch_flower) { + ret = -ENOENT; + goto err; + } + + ret = cxgb4_get_filter_counters(dev, ch_flower->filter_id, + &packets, &bytes, + ch_flower->fs.hash); + if (ret < 0) + goto err; + + spin_lock_bh(&ch_flower->lock); + ofld_stats = &ch_flower->stats; + if (ofld_stats->packet_count != packets) { + if (ofld_stats->prev_packet_count != packets) + ofld_stats->last_used = jiffies; + tcf_exts_stats_update(cls->exts, bytes - ofld_stats->byte_count, + packets - ofld_stats->packet_count, + ofld_stats->last_used); + + ofld_stats->packet_count = packets; + ofld_stats->byte_count = bytes; + ofld_stats->prev_packet_count = packets; + } + spin_unlock_bh(&ch_flower->lock); + return 0; + +err: + return ret; +} + +static const struct rhashtable_params cxgb4_tc_flower_ht_params = { + .nelem_hint = 384, + .head_offset = offsetof(struct ch_tc_flower_entry, node), + .key_offset = offsetof(struct ch_tc_flower_entry, tc_flower_cookie), + .key_len = sizeof(((struct ch_tc_flower_entry *)0)->tc_flower_cookie), + .max_size = 524288, + .min_size = 512, + .automatic_shrinking = true +}; + +int cxgb4_init_tc_flower(struct adapter *adap) +{ + int ret; + + adap->flower_ht_params = cxgb4_tc_flower_ht_params; + ret = rhashtable_init(&adap->flower_tbl, &adap->flower_ht_params); + if (ret) + return ret; + + INIT_WORK(&adap->flower_stats_work, ch_flower_stats_handler); + timer_setup(&adap->flower_stats_timer, ch_flower_stats_cb, 0); + mod_timer(&adap->flower_stats_timer, jiffies + STATS_CHECK_PERIOD); + return 0; +} + +void cxgb4_cleanup_tc_flower(struct adapter *adap) +{ + if (adap->flower_stats_timer.function) + del_timer_sync(&adap->flower_stats_timer); + cancel_work_sync(&adap->flower_stats_work); + rhashtable_destroy(&adap->flower_tbl); +} |