mirror of
https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git
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8d26d5636d
All drivers are converted to use block callbacks for TC_SETUP_CLS*. So it is now safe to remove the calls to ndo_setup_tc from cls_* Signed-off-by: Jiri Pirko <jiri@mellanox.com> Signed-off-by: David S. Miller <davem@davemloft.net>
514 lines
14 KiB
C
514 lines
14 KiB
C
/*
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* Copyright (C) 2017 Netronome Systems, Inc.
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*
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* This software is dual licensed under the GNU General License Version 2,
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* June 1991 as shown in the file COPYING in the top-level directory of this
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* source tree or the BSD 2-Clause License provided below. You have the
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* option to license this software under the complete terms of either license.
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*
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* The BSD 2-Clause License:
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*
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* Redistribution and use in source and binary forms, with or
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* without modification, are permitted provided that the following
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* conditions are met:
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*
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* 1. Redistributions of source code must retain the above
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* copyright notice, this list of conditions and the following
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* disclaimer.
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*
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* 2. Redistributions in binary form must reproduce the above
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* copyright notice, this list of conditions and the following
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* disclaimer in the documentation and/or other materials
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* provided with the distribution.
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*
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* THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND,
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* EXPRESS OR IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF
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* MERCHANTABILITY, FITNESS FOR A PARTICULAR PURPOSE AND
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* NONINFRINGEMENT. IN NO EVENT SHALL THE AUTHORS OR COPYRIGHT HOLDERS
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* BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER LIABILITY, WHETHER IN AN
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* ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM, OUT OF OR IN
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* CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE
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* SOFTWARE.
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*/
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#include <linux/skbuff.h>
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#include <net/devlink.h>
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#include <net/pkt_cls.h>
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#include "cmsg.h"
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#include "main.h"
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#include "../nfpcore/nfp_cpp.h"
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#include "../nfpcore/nfp_nsp.h"
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#include "../nfp_app.h"
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#include "../nfp_main.h"
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#include "../nfp_net.h"
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#include "../nfp_port.h"
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#define NFP_FLOWER_WHITELIST_DISSECTOR \
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(BIT(FLOW_DISSECTOR_KEY_CONTROL) | \
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BIT(FLOW_DISSECTOR_KEY_BASIC) | \
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BIT(FLOW_DISSECTOR_KEY_IPV4_ADDRS) | \
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BIT(FLOW_DISSECTOR_KEY_IPV6_ADDRS) | \
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BIT(FLOW_DISSECTOR_KEY_PORTS) | \
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BIT(FLOW_DISSECTOR_KEY_ETH_ADDRS) | \
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BIT(FLOW_DISSECTOR_KEY_VLAN) | \
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BIT(FLOW_DISSECTOR_KEY_ENC_KEYID) | \
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BIT(FLOW_DISSECTOR_KEY_ENC_IPV4_ADDRS) | \
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BIT(FLOW_DISSECTOR_KEY_ENC_IPV6_ADDRS) | \
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BIT(FLOW_DISSECTOR_KEY_ENC_CONTROL) | \
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BIT(FLOW_DISSECTOR_KEY_ENC_PORTS) | \
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BIT(FLOW_DISSECTOR_KEY_MPLS) | \
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BIT(FLOW_DISSECTOR_KEY_IP))
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#define NFP_FLOWER_WHITELIST_TUN_DISSECTOR \
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(BIT(FLOW_DISSECTOR_KEY_ENC_CONTROL) | \
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BIT(FLOW_DISSECTOR_KEY_ENC_KEYID) | \
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BIT(FLOW_DISSECTOR_KEY_ENC_IPV4_ADDRS) | \
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BIT(FLOW_DISSECTOR_KEY_ENC_IPV6_ADDRS) | \
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BIT(FLOW_DISSECTOR_KEY_ENC_PORTS))
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#define NFP_FLOWER_WHITELIST_TUN_DISSECTOR_R \
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(BIT(FLOW_DISSECTOR_KEY_ENC_CONTROL) | \
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BIT(FLOW_DISSECTOR_KEY_ENC_IPV4_ADDRS) | \
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BIT(FLOW_DISSECTOR_KEY_ENC_PORTS))
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static int
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nfp_flower_xmit_flow(struct net_device *netdev,
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struct nfp_fl_payload *nfp_flow, u8 mtype)
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{
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u32 meta_len, key_len, mask_len, act_len, tot_len;
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struct nfp_repr *priv = netdev_priv(netdev);
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struct sk_buff *skb;
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unsigned char *msg;
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meta_len = sizeof(struct nfp_fl_rule_metadata);
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key_len = nfp_flow->meta.key_len;
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mask_len = nfp_flow->meta.mask_len;
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act_len = nfp_flow->meta.act_len;
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tot_len = meta_len + key_len + mask_len + act_len;
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/* Convert to long words as firmware expects
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* lengths in units of NFP_FL_LW_SIZ.
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*/
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nfp_flow->meta.key_len >>= NFP_FL_LW_SIZ;
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nfp_flow->meta.mask_len >>= NFP_FL_LW_SIZ;
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nfp_flow->meta.act_len >>= NFP_FL_LW_SIZ;
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skb = nfp_flower_cmsg_alloc(priv->app, tot_len, mtype);
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if (!skb)
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return -ENOMEM;
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msg = nfp_flower_cmsg_get_data(skb);
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memcpy(msg, &nfp_flow->meta, meta_len);
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memcpy(&msg[meta_len], nfp_flow->unmasked_data, key_len);
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memcpy(&msg[meta_len + key_len], nfp_flow->mask_data, mask_len);
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memcpy(&msg[meta_len + key_len + mask_len],
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nfp_flow->action_data, act_len);
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/* Convert back to bytes as software expects
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* lengths in units of bytes.
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*/
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nfp_flow->meta.key_len <<= NFP_FL_LW_SIZ;
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nfp_flow->meta.mask_len <<= NFP_FL_LW_SIZ;
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nfp_flow->meta.act_len <<= NFP_FL_LW_SIZ;
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nfp_ctrl_tx(priv->app->ctrl, skb);
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return 0;
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}
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static bool nfp_flower_check_higher_than_mac(struct tc_cls_flower_offload *f)
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{
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return dissector_uses_key(f->dissector,
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FLOW_DISSECTOR_KEY_IPV4_ADDRS) ||
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dissector_uses_key(f->dissector,
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FLOW_DISSECTOR_KEY_IPV6_ADDRS) ||
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dissector_uses_key(f->dissector,
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FLOW_DISSECTOR_KEY_PORTS) ||
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dissector_uses_key(f->dissector, FLOW_DISSECTOR_KEY_ICMP);
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}
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static int
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nfp_flower_calculate_key_layers(struct nfp_fl_key_ls *ret_key_ls,
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struct tc_cls_flower_offload *flow)
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{
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struct flow_dissector_key_basic *mask_basic = NULL;
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struct flow_dissector_key_basic *key_basic = NULL;
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u32 key_layer_two;
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u8 key_layer;
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int key_size;
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if (flow->dissector->used_keys & ~NFP_FLOWER_WHITELIST_DISSECTOR)
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return -EOPNOTSUPP;
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/* If any tun dissector is used then the required set must be used. */
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if (flow->dissector->used_keys & NFP_FLOWER_WHITELIST_TUN_DISSECTOR &&
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(flow->dissector->used_keys & NFP_FLOWER_WHITELIST_TUN_DISSECTOR_R)
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!= NFP_FLOWER_WHITELIST_TUN_DISSECTOR_R)
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return -EOPNOTSUPP;
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key_layer_two = 0;
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key_layer = NFP_FLOWER_LAYER_PORT | NFP_FLOWER_LAYER_MAC;
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key_size = sizeof(struct nfp_flower_meta_one) +
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sizeof(struct nfp_flower_in_port) +
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sizeof(struct nfp_flower_mac_mpls);
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if (dissector_uses_key(flow->dissector,
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FLOW_DISSECTOR_KEY_ENC_CONTROL)) {
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struct flow_dissector_key_ipv4_addrs *mask_ipv4 = NULL;
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struct flow_dissector_key_ports *mask_enc_ports = NULL;
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struct flow_dissector_key_ports *enc_ports = NULL;
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struct flow_dissector_key_control *mask_enc_ctl =
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skb_flow_dissector_target(flow->dissector,
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FLOW_DISSECTOR_KEY_ENC_CONTROL,
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flow->mask);
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struct flow_dissector_key_control *enc_ctl =
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skb_flow_dissector_target(flow->dissector,
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FLOW_DISSECTOR_KEY_ENC_CONTROL,
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flow->key);
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if (mask_enc_ctl->addr_type != 0xffff ||
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enc_ctl->addr_type != FLOW_DISSECTOR_KEY_IPV4_ADDRS)
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return -EOPNOTSUPP;
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/* These fields are already verified as used. */
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mask_ipv4 =
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skb_flow_dissector_target(flow->dissector,
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FLOW_DISSECTOR_KEY_ENC_IPV4_ADDRS,
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flow->mask);
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if (mask_ipv4->dst != cpu_to_be32(~0))
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return -EOPNOTSUPP;
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mask_enc_ports =
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skb_flow_dissector_target(flow->dissector,
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FLOW_DISSECTOR_KEY_ENC_PORTS,
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flow->mask);
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enc_ports =
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skb_flow_dissector_target(flow->dissector,
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FLOW_DISSECTOR_KEY_ENC_PORTS,
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flow->key);
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if (mask_enc_ports->dst != cpu_to_be16(~0) ||
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enc_ports->dst != htons(NFP_FL_VXLAN_PORT))
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return -EOPNOTSUPP;
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key_layer |= NFP_FLOWER_LAYER_VXLAN;
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key_size += sizeof(struct nfp_flower_vxlan);
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}
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if (dissector_uses_key(flow->dissector, FLOW_DISSECTOR_KEY_BASIC)) {
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mask_basic = skb_flow_dissector_target(flow->dissector,
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FLOW_DISSECTOR_KEY_BASIC,
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flow->mask);
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key_basic = skb_flow_dissector_target(flow->dissector,
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FLOW_DISSECTOR_KEY_BASIC,
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flow->key);
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}
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if (mask_basic && mask_basic->n_proto) {
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/* Ethernet type is present in the key. */
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switch (key_basic->n_proto) {
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case cpu_to_be16(ETH_P_IP):
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key_layer |= NFP_FLOWER_LAYER_IPV4;
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key_size += sizeof(struct nfp_flower_ipv4);
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break;
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case cpu_to_be16(ETH_P_IPV6):
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key_layer |= NFP_FLOWER_LAYER_IPV6;
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key_size += sizeof(struct nfp_flower_ipv6);
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break;
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/* Currently we do not offload ARP
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* because we rely on it to get to the host.
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*/
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case cpu_to_be16(ETH_P_ARP):
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return -EOPNOTSUPP;
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/* Will be included in layer 2. */
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case cpu_to_be16(ETH_P_8021Q):
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break;
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default:
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/* Other ethtype - we need check the masks for the
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* remainder of the key to ensure we can offload.
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*/
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if (nfp_flower_check_higher_than_mac(flow))
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return -EOPNOTSUPP;
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break;
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}
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}
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if (mask_basic && mask_basic->ip_proto) {
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/* Ethernet type is present in the key. */
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switch (key_basic->ip_proto) {
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case IPPROTO_TCP:
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case IPPROTO_UDP:
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case IPPROTO_SCTP:
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case IPPROTO_ICMP:
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case IPPROTO_ICMPV6:
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key_layer |= NFP_FLOWER_LAYER_TP;
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key_size += sizeof(struct nfp_flower_tp_ports);
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break;
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default:
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/* Other ip proto - we need check the masks for the
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* remainder of the key to ensure we can offload.
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*/
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return -EOPNOTSUPP;
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}
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}
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ret_key_ls->key_layer = key_layer;
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ret_key_ls->key_layer_two = key_layer_two;
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ret_key_ls->key_size = key_size;
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return 0;
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}
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static struct nfp_fl_payload *
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nfp_flower_allocate_new(struct nfp_fl_key_ls *key_layer)
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{
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struct nfp_fl_payload *flow_pay;
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flow_pay = kmalloc(sizeof(*flow_pay), GFP_KERNEL);
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if (!flow_pay)
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return NULL;
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flow_pay->meta.key_len = key_layer->key_size;
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flow_pay->unmasked_data = kmalloc(key_layer->key_size, GFP_KERNEL);
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if (!flow_pay->unmasked_data)
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goto err_free_flow;
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flow_pay->meta.mask_len = key_layer->key_size;
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flow_pay->mask_data = kmalloc(key_layer->key_size, GFP_KERNEL);
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if (!flow_pay->mask_data)
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goto err_free_unmasked;
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flow_pay->action_data = kmalloc(NFP_FL_MAX_A_SIZ, GFP_KERNEL);
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if (!flow_pay->action_data)
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goto err_free_mask;
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flow_pay->nfp_tun_ipv4_addr = 0;
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flow_pay->meta.flags = 0;
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spin_lock_init(&flow_pay->lock);
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return flow_pay;
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err_free_mask:
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kfree(flow_pay->mask_data);
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err_free_unmasked:
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kfree(flow_pay->unmasked_data);
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err_free_flow:
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kfree(flow_pay);
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return NULL;
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}
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/**
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* nfp_flower_add_offload() - Adds a new flow to hardware.
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* @app: Pointer to the APP handle
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* @netdev: netdev structure.
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* @flow: TC flower classifier offload structure.
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*
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* Adds a new flow to the repeated hash structure and action payload.
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*
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* Return: negative value on error, 0 if configured successfully.
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*/
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static int
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nfp_flower_add_offload(struct nfp_app *app, struct net_device *netdev,
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struct tc_cls_flower_offload *flow)
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{
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struct nfp_flower_priv *priv = app->priv;
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struct nfp_fl_payload *flow_pay;
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struct nfp_fl_key_ls *key_layer;
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int err;
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key_layer = kmalloc(sizeof(*key_layer), GFP_KERNEL);
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if (!key_layer)
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return -ENOMEM;
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err = nfp_flower_calculate_key_layers(key_layer, flow);
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if (err)
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goto err_free_key_ls;
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flow_pay = nfp_flower_allocate_new(key_layer);
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if (!flow_pay) {
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err = -ENOMEM;
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goto err_free_key_ls;
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}
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err = nfp_flower_compile_flow_match(flow, key_layer, netdev, flow_pay);
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if (err)
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goto err_destroy_flow;
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err = nfp_flower_compile_action(flow, netdev, flow_pay);
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if (err)
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goto err_destroy_flow;
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err = nfp_compile_flow_metadata(app, flow, flow_pay);
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if (err)
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goto err_destroy_flow;
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err = nfp_flower_xmit_flow(netdev, flow_pay,
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NFP_FLOWER_CMSG_TYPE_FLOW_ADD);
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if (err)
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goto err_destroy_flow;
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INIT_HLIST_NODE(&flow_pay->link);
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flow_pay->tc_flower_cookie = flow->cookie;
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hash_add_rcu(priv->flow_table, &flow_pay->link, flow->cookie);
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/* Deallocate flow payload when flower rule has been destroyed. */
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kfree(key_layer);
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return 0;
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err_destroy_flow:
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kfree(flow_pay->action_data);
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kfree(flow_pay->mask_data);
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kfree(flow_pay->unmasked_data);
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kfree(flow_pay);
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err_free_key_ls:
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kfree(key_layer);
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return err;
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}
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/**
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* nfp_flower_del_offload() - Removes a flow from hardware.
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* @app: Pointer to the APP handle
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* @netdev: netdev structure.
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* @flow: TC flower classifier offload structure
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*
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* Removes a flow from the repeated hash structure and clears the
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* action payload.
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*
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* Return: negative value on error, 0 if removed successfully.
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*/
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static int
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nfp_flower_del_offload(struct nfp_app *app, struct net_device *netdev,
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struct tc_cls_flower_offload *flow)
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{
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struct nfp_fl_payload *nfp_flow;
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int err;
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nfp_flow = nfp_flower_search_fl_table(app, flow->cookie);
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if (!nfp_flow)
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return -ENOENT;
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err = nfp_modify_flow_metadata(app, nfp_flow);
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if (err)
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goto err_free_flow;
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if (nfp_flow->nfp_tun_ipv4_addr)
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nfp_tunnel_del_ipv4_off(app, nfp_flow->nfp_tun_ipv4_addr);
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err = nfp_flower_xmit_flow(netdev, nfp_flow,
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NFP_FLOWER_CMSG_TYPE_FLOW_DEL);
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if (err)
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goto err_free_flow;
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err_free_flow:
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hash_del_rcu(&nfp_flow->link);
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kfree(nfp_flow->action_data);
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kfree(nfp_flow->mask_data);
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kfree(nfp_flow->unmasked_data);
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kfree_rcu(nfp_flow, rcu);
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return err;
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}
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/**
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* nfp_flower_get_stats() - Populates flow stats obtained from hardware.
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* @app: Pointer to the APP handle
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* @flow: TC flower classifier offload structure
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*
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* Populates a flow statistics structure which which corresponds to a
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* specific flow.
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*
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* Return: negative value on error, 0 if stats populated successfully.
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*/
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static int
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nfp_flower_get_stats(struct nfp_app *app, struct tc_cls_flower_offload *flow)
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{
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struct nfp_fl_payload *nfp_flow;
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nfp_flow = nfp_flower_search_fl_table(app, flow->cookie);
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if (!nfp_flow)
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return -EINVAL;
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spin_lock_bh(&nfp_flow->lock);
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tcf_exts_stats_update(flow->exts, nfp_flow->stats.bytes,
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nfp_flow->stats.pkts, nfp_flow->stats.used);
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nfp_flow->stats.pkts = 0;
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nfp_flow->stats.bytes = 0;
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spin_unlock_bh(&nfp_flow->lock);
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return 0;
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}
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static int
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nfp_flower_repr_offload(struct nfp_app *app, struct net_device *netdev,
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struct tc_cls_flower_offload *flower)
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{
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if (!eth_proto_is_802_3(flower->common.protocol) ||
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flower->common.chain_index)
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return -EOPNOTSUPP;
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switch (flower->command) {
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case TC_CLSFLOWER_REPLACE:
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return nfp_flower_add_offload(app, netdev, flower);
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case TC_CLSFLOWER_DESTROY:
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return nfp_flower_del_offload(app, netdev, flower);
|
||
case TC_CLSFLOWER_STATS:
|
||
return nfp_flower_get_stats(app, flower);
|
||
}
|
||
|
||
return -EOPNOTSUPP;
|
||
}
|
||
|
||
static int nfp_flower_setup_tc_block_cb(enum tc_setup_type type,
|
||
void *type_data, void *cb_priv)
|
||
{
|
||
struct nfp_net *nn = cb_priv;
|
||
|
||
switch (type) {
|
||
case TC_SETUP_CLSFLOWER:
|
||
return nfp_flower_repr_offload(nn->app, nn->port->netdev,
|
||
type_data);
|
||
default:
|
||
return -EOPNOTSUPP;
|
||
}
|
||
}
|
||
|
||
static int nfp_flower_setup_tc_block(struct net_device *netdev,
|
||
struct tc_block_offload *f)
|
||
{
|
||
struct nfp_net *nn = netdev_priv(netdev);
|
||
|
||
if (f->binder_type != TCF_BLOCK_BINDER_TYPE_CLSACT_INGRESS)
|
||
return -EOPNOTSUPP;
|
||
|
||
switch (f->command) {
|
||
case TC_BLOCK_BIND:
|
||
return tcf_block_cb_register(f->block,
|
||
nfp_flower_setup_tc_block_cb,
|
||
nn, nn);
|
||
case TC_BLOCK_UNBIND:
|
||
tcf_block_cb_unregister(f->block,
|
||
nfp_flower_setup_tc_block_cb,
|
||
nn);
|
||
return 0;
|
||
default:
|
||
return -EOPNOTSUPP;
|
||
}
|
||
}
|
||
|
||
int nfp_flower_setup_tc(struct nfp_app *app, struct net_device *netdev,
|
||
enum tc_setup_type type, void *type_data)
|
||
{
|
||
switch (type) {
|
||
case TC_SETUP_BLOCK:
|
||
return nfp_flower_setup_tc_block(netdev, type_data);
|
||
default:
|
||
return -EOPNOTSUPP;
|
||
}
|
||
}
|