382 lines
9.8 KiB
C
382 lines
9.8 KiB
C
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// SPDX-License-Identifier: (GPL-2.0-only OR BSD-2-Clause)
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/* Copyright (C) 2015-2018 Netronome Systems, Inc. */
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#include <linux/bitfield.h>
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#include <linux/netdevice.h>
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#include <linux/skbuff.h>
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#include <linux/workqueue.h>
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#include <net/dst_metadata.h>
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#include "main.h"
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#include "../nfp_net.h"
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#include "../nfp_net_repr.h"
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#include "./cmsg.h"
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static struct nfp_flower_cmsg_hdr *
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nfp_flower_cmsg_get_hdr(struct sk_buff *skb)
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{
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return (struct nfp_flower_cmsg_hdr *)skb->data;
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}
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struct sk_buff *
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nfp_flower_cmsg_alloc(struct nfp_app *app, unsigned int size,
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enum nfp_flower_cmsg_type_port type, gfp_t flag)
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{
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struct nfp_flower_cmsg_hdr *ch;
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struct sk_buff *skb;
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size += NFP_FLOWER_CMSG_HLEN;
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skb = nfp_app_ctrl_msg_alloc(app, size, flag);
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if (!skb)
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return NULL;
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ch = nfp_flower_cmsg_get_hdr(skb);
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ch->pad = 0;
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ch->version = NFP_FLOWER_CMSG_VER1;
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ch->type = type;
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skb_put(skb, size);
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return skb;
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}
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struct sk_buff *
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nfp_flower_cmsg_mac_repr_start(struct nfp_app *app, unsigned int num_ports)
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{
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struct nfp_flower_cmsg_mac_repr *msg;
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struct sk_buff *skb;
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skb = nfp_flower_cmsg_alloc(app, struct_size(msg, ports, num_ports),
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NFP_FLOWER_CMSG_TYPE_MAC_REPR, GFP_KERNEL);
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if (!skb)
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return NULL;
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msg = nfp_flower_cmsg_get_data(skb);
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memset(msg->reserved, 0, sizeof(msg->reserved));
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msg->num_ports = num_ports;
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return skb;
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}
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void
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nfp_flower_cmsg_mac_repr_add(struct sk_buff *skb, unsigned int idx,
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unsigned int nbi, unsigned int nbi_port,
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unsigned int phys_port)
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{
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struct nfp_flower_cmsg_mac_repr *msg;
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msg = nfp_flower_cmsg_get_data(skb);
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msg->ports[idx].idx = idx;
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msg->ports[idx].info = nbi & NFP_FLOWER_CMSG_MAC_REPR_NBI;
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msg->ports[idx].nbi_port = nbi_port;
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msg->ports[idx].phys_port = phys_port;
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}
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int nfp_flower_cmsg_portmod(struct nfp_repr *repr, bool carrier_ok,
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unsigned int mtu, bool mtu_only)
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{
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struct nfp_flower_cmsg_portmod *msg;
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struct sk_buff *skb;
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skb = nfp_flower_cmsg_alloc(repr->app, sizeof(*msg),
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NFP_FLOWER_CMSG_TYPE_PORT_MOD, GFP_KERNEL);
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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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msg->portnum = cpu_to_be32(repr->dst->u.port_info.port_id);
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msg->reserved = 0;
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msg->info = carrier_ok;
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if (mtu_only)
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msg->info |= NFP_FLOWER_CMSG_PORTMOD_MTU_CHANGE_ONLY;
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msg->mtu = cpu_to_be16(mtu);
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nfp_ctrl_tx(repr->app->ctrl, skb);
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return 0;
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}
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int nfp_flower_cmsg_portreify(struct nfp_repr *repr, bool exists)
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{
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struct nfp_flower_cmsg_portreify *msg;
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struct sk_buff *skb;
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skb = nfp_flower_cmsg_alloc(repr->app, sizeof(*msg),
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NFP_FLOWER_CMSG_TYPE_PORT_REIFY,
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GFP_KERNEL);
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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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msg->portnum = cpu_to_be32(repr->dst->u.port_info.port_id);
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msg->reserved = 0;
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msg->info = cpu_to_be16(exists);
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nfp_ctrl_tx(repr->app->ctrl, skb);
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return 0;
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}
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static bool
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nfp_flower_process_mtu_ack(struct nfp_app *app, struct sk_buff *skb)
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{
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struct nfp_flower_priv *app_priv = app->priv;
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struct nfp_flower_cmsg_portmod *msg;
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msg = nfp_flower_cmsg_get_data(skb);
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if (!(msg->info & NFP_FLOWER_CMSG_PORTMOD_MTU_CHANGE_ONLY))
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return false;
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spin_lock_bh(&app_priv->mtu_conf.lock);
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if (!app_priv->mtu_conf.requested_val ||
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app_priv->mtu_conf.portnum != be32_to_cpu(msg->portnum) ||
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be16_to_cpu(msg->mtu) != app_priv->mtu_conf.requested_val) {
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/* Not an ack for requested MTU change. */
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spin_unlock_bh(&app_priv->mtu_conf.lock);
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return false;
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}
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app_priv->mtu_conf.ack = true;
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app_priv->mtu_conf.requested_val = 0;
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wake_up(&app_priv->mtu_conf.wait_q);
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spin_unlock_bh(&app_priv->mtu_conf.lock);
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return true;
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}
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static void
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nfp_flower_cmsg_portmod_rx(struct nfp_app *app, struct sk_buff *skb)
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{
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struct nfp_flower_cmsg_portmod *msg;
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struct net_device *netdev;
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bool link;
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msg = nfp_flower_cmsg_get_data(skb);
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link = msg->info & NFP_FLOWER_CMSG_PORTMOD_INFO_LINK;
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rtnl_lock();
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rcu_read_lock();
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netdev = nfp_app_dev_get(app, be32_to_cpu(msg->portnum), NULL);
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rcu_read_unlock();
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if (!netdev) {
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nfp_flower_cmsg_warn(app, "ctrl msg for unknown port 0x%08x\n",
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be32_to_cpu(msg->portnum));
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rtnl_unlock();
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return;
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}
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if (link) {
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u16 mtu = be16_to_cpu(msg->mtu);
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netif_carrier_on(netdev);
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/* An MTU of 0 from the firmware should be ignored */
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if (mtu)
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dev_set_mtu(netdev, mtu);
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} else {
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netif_carrier_off(netdev);
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}
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rtnl_unlock();
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}
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static void
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nfp_flower_cmsg_portreify_rx(struct nfp_app *app, struct sk_buff *skb)
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{
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struct nfp_flower_priv *priv = app->priv;
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struct nfp_flower_cmsg_portreify *msg;
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bool exists;
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msg = nfp_flower_cmsg_get_data(skb);
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rcu_read_lock();
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exists = !!nfp_app_dev_get(app, be32_to_cpu(msg->portnum), NULL);
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rcu_read_unlock();
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if (!exists) {
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nfp_flower_cmsg_warn(app, "ctrl msg for unknown port 0x%08x\n",
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be32_to_cpu(msg->portnum));
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return;
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}
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atomic_inc(&priv->reify_replies);
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wake_up(&priv->reify_wait_queue);
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}
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static void
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nfp_flower_cmsg_merge_hint_rx(struct nfp_app *app, struct sk_buff *skb)
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{
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unsigned int msg_len = nfp_flower_cmsg_get_data_len(skb);
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struct nfp_flower_cmsg_merge_hint *msg;
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struct nfp_fl_payload *sub_flows[2];
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int err, i, flow_cnt;
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msg = nfp_flower_cmsg_get_data(skb);
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/* msg->count starts at 0 and always assumes at least 1 entry. */
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flow_cnt = msg->count + 1;
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if (msg_len < struct_size(msg, flow, flow_cnt)) {
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nfp_flower_cmsg_warn(app, "Merge hint ctrl msg too short - %d bytes but expect %zd\n",
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msg_len, struct_size(msg, flow, flow_cnt));
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return;
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}
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if (flow_cnt != 2) {
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nfp_flower_cmsg_warn(app, "Merge hint contains %d flows - two are expected\n",
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flow_cnt);
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return;
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}
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rtnl_lock();
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for (i = 0; i < flow_cnt; i++) {
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u32 ctx = be32_to_cpu(msg->flow[i].host_ctx);
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sub_flows[i] = nfp_flower_get_fl_payload_from_ctx(app, ctx);
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if (!sub_flows[i]) {
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nfp_flower_cmsg_warn(app, "Invalid flow in merge hint\n");
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goto err_rtnl_unlock;
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}
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}
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err = nfp_flower_merge_offloaded_flows(app, sub_flows[0], sub_flows[1]);
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/* Only warn on memory fail. Hint veto will not break functionality. */
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if (err == -ENOMEM)
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nfp_flower_cmsg_warn(app, "Flow merge memory fail.\n");
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err_rtnl_unlock:
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rtnl_unlock();
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}
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static void
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nfp_flower_cmsg_process_one_rx(struct nfp_app *app, struct sk_buff *skb)
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{
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struct nfp_flower_priv *app_priv = app->priv;
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struct nfp_flower_cmsg_hdr *cmsg_hdr;
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enum nfp_flower_cmsg_type_port type;
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bool skb_stored = false;
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cmsg_hdr = nfp_flower_cmsg_get_hdr(skb);
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type = cmsg_hdr->type;
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switch (type) {
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case NFP_FLOWER_CMSG_TYPE_PORT_MOD:
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nfp_flower_cmsg_portmod_rx(app, skb);
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break;
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case NFP_FLOWER_CMSG_TYPE_MERGE_HINT:
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if (app_priv->flower_en_feats & NFP_FL_ENABLE_FLOW_MERGE) {
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nfp_flower_cmsg_merge_hint_rx(app, skb);
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break;
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}
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goto err_default;
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case NFP_FLOWER_CMSG_TYPE_NO_NEIGH:
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nfp_tunnel_request_route_v4(app, skb);
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break;
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case NFP_FLOWER_CMSG_TYPE_NO_NEIGH_V6:
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nfp_tunnel_request_route_v6(app, skb);
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break;
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case NFP_FLOWER_CMSG_TYPE_ACTIVE_TUNS:
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nfp_tunnel_keep_alive(app, skb);
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break;
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case NFP_FLOWER_CMSG_TYPE_ACTIVE_TUNS_V6:
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nfp_tunnel_keep_alive_v6(app, skb);
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break;
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case NFP_FLOWER_CMSG_TYPE_QOS_STATS:
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nfp_flower_stats_rlim_reply(app, skb);
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break;
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case NFP_FLOWER_CMSG_TYPE_LAG_CONFIG:
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if (app_priv->flower_en_feats & NFP_FL_ENABLE_LAG) {
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skb_stored = nfp_flower_lag_unprocessed_msg(app, skb);
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break;
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}
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fallthrough;
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default:
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err_default:
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nfp_flower_cmsg_warn(app, "Cannot handle invalid repr control type %u\n",
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type);
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goto out;
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}
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if (!skb_stored)
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dev_consume_skb_any(skb);
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return;
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out:
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dev_kfree_skb_any(skb);
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}
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void nfp_flower_cmsg_process_rx(struct work_struct *work)
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{
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struct sk_buff_head cmsg_joined;
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struct nfp_flower_priv *priv;
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struct sk_buff *skb;
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priv = container_of(work, struct nfp_flower_priv, cmsg_work);
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skb_queue_head_init(&cmsg_joined);
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spin_lock_bh(&priv->cmsg_skbs_high.lock);
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skb_queue_splice_tail_init(&priv->cmsg_skbs_high, &cmsg_joined);
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spin_unlock_bh(&priv->cmsg_skbs_high.lock);
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spin_lock_bh(&priv->cmsg_skbs_low.lock);
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skb_queue_splice_tail_init(&priv->cmsg_skbs_low, &cmsg_joined);
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spin_unlock_bh(&priv->cmsg_skbs_low.lock);
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while ((skb = __skb_dequeue(&cmsg_joined)))
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nfp_flower_cmsg_process_one_rx(priv->app, skb);
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}
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static void
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nfp_flower_queue_ctl_msg(struct nfp_app *app, struct sk_buff *skb, int type)
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{
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struct nfp_flower_priv *priv = app->priv;
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struct sk_buff_head *skb_head;
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if (type == NFP_FLOWER_CMSG_TYPE_PORT_MOD)
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skb_head = &priv->cmsg_skbs_high;
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else
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skb_head = &priv->cmsg_skbs_low;
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if (skb_queue_len(skb_head) >= NFP_FLOWER_WORKQ_MAX_SKBS) {
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nfp_flower_cmsg_warn(app, "Dropping queued control messages\n");
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dev_kfree_skb_any(skb);
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return;
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}
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skb_queue_tail(skb_head, skb);
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schedule_work(&priv->cmsg_work);
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}
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void nfp_flower_cmsg_rx(struct nfp_app *app, struct sk_buff *skb)
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{
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struct nfp_flower_cmsg_hdr *cmsg_hdr;
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cmsg_hdr = nfp_flower_cmsg_get_hdr(skb);
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|
|
if (unlikely(cmsg_hdr->version != NFP_FLOWER_CMSG_VER1)) {
|
||
|
|
nfp_flower_cmsg_warn(app, "Cannot handle repr control version %u\n",
|
||
|
|
cmsg_hdr->version);
|
||
|
|
dev_kfree_skb_any(skb);
|
||
|
|
return;
|
||
|
|
}
|
||
|
|
|
||
|
|
if (cmsg_hdr->type == NFP_FLOWER_CMSG_TYPE_FLOW_STATS) {
|
||
|
|
/* We need to deal with stats updates from HW asap */
|
||
|
|
nfp_flower_rx_flow_stats(app, skb);
|
||
|
|
dev_consume_skb_any(skb);
|
||
|
|
} else if (cmsg_hdr->type == NFP_FLOWER_CMSG_TYPE_PORT_MOD &&
|
||
|
|
nfp_flower_process_mtu_ack(app, skb)) {
|
||
|
|
/* Handle MTU acks outside wq to prevent RTNL conflict. */
|
||
|
|
dev_consume_skb_any(skb);
|
||
|
|
} else if (cmsg_hdr->type == NFP_FLOWER_CMSG_TYPE_TUN_NEIGH ||
|
||
|
|
cmsg_hdr->type == NFP_FLOWER_CMSG_TYPE_TUN_NEIGH_V6) {
|
||
|
|
/* Acks from the NFP that the route is added - ignore. */
|
||
|
|
dev_consume_skb_any(skb);
|
||
|
|
} else if (cmsg_hdr->type == NFP_FLOWER_CMSG_TYPE_PORT_REIFY) {
|
||
|
|
/* Handle REIFY acks outside wq to prevent RTNL conflict. */
|
||
|
|
nfp_flower_cmsg_portreify_rx(app, skb);
|
||
|
|
dev_consume_skb_any(skb);
|
||
|
|
} else {
|
||
|
|
nfp_flower_queue_ctl_msg(app, skb, cmsg_hdr->type);
|
||
|
|
}
|
||
|
|
}
|