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gerrit-public.fairphone.software / kernel / msm-4.19 / 96fc294cf6cb27f01a865959b9637d0aea3b57c2 / . / drivers / net / ethernet / mellanox / mlx4 / en_netdev.c
blob: 4198e9bf89d044733e83596dec346dbd0c6a38a9 [file] [log] [blame]
/*
* Copyright (c) 2007 Mellanox Technologies. 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 <linux/bpf.h>
#include <linux/etherdevice.h>
#include <linux/tcp.h>
#include <linux/if_vlan.h>
#include <linux/delay.h>
#include <linux/slab.h>
#include <linux/hash.h>
#include <net/ip.h>
#include <net/busy_poll.h>
#include <net/vxlan.h>
#include <net/devlink.h>
#include <linux/mlx4/driver.h>
#include <linux/mlx4/device.h>
#include <linux/mlx4/cmd.h>
#include <linux/mlx4/cq.h>
#include "mlx4_en.h"
#include "en_port.h"
int mlx4_en_setup_tc(struct net_device *dev, u8 up)
{
struct mlx4_en_priv *priv = netdev_priv(dev);
int i;
unsigned int offset = 0;
if (up && up != MLX4_EN_NUM_UP)
return -EINVAL;
netdev_set_num_tc(dev, up);
/* Partition Tx queues evenly amongst UP's */
for (i = 0; i < up; i++) {
netdev_set_tc_queue(dev, i, priv->num_tx_rings_p_up, offset);
offset += priv->num_tx_rings_p_up;
}
#ifdef CONFIG_MLX4_EN_DCB
if (!mlx4_is_slave(priv->mdev->dev)) {
if (up) {
priv->flags |= MLX4_EN_FLAG_DCB_ENABLED;
} else {
priv->flags &= ~MLX4_EN_FLAG_DCB_ENABLED;
priv->cee_params.dcb_cfg.pfc_state = false;
}
}
#endif /* CONFIG_MLX4_EN_DCB */
return 0;
}
static int __mlx4_en_setup_tc(struct net_device *dev, u32 handle, __be16 proto,
struct tc_to_netdev *tc)
{
if (tc->type != TC_SETUP_MQPRIO)
return -EINVAL;
return mlx4_en_setup_tc(dev, tc->tc);
}
#ifdef CONFIG_RFS_ACCEL
struct mlx4_en_filter {
struct list_head next;
struct work_struct work;
u8 ip_proto;
__be32 src_ip;
__be32 dst_ip;
__be16 src_port;
__be16 dst_port;
int rxq_index;
struct mlx4_en_priv *priv;
u32 flow_id; /* RFS infrastructure id */
int id; /* mlx4_en driver id */
u64 reg_id; /* Flow steering API id */
u8 activated; /* Used to prevent expiry before filter
* is attached
*/
struct hlist_node filter_chain;
};
static void mlx4_en_filter_rfs_expire(struct mlx4_en_priv *priv);
static enum mlx4_net_trans_rule_id mlx4_ip_proto_to_trans_rule_id(u8 ip_proto)
{
switch (ip_proto) {
case IPPROTO_UDP:
return MLX4_NET_TRANS_RULE_ID_UDP;
case IPPROTO_TCP:
return MLX4_NET_TRANS_RULE_ID_TCP;
default:
return MLX4_NET_TRANS_RULE_NUM;
}
};
static void mlx4_en_filter_work(struct work_struct *work)
{
struct mlx4_en_filter *filter = container_of(work,
struct mlx4_en_filter,
work);
struct mlx4_en_priv *priv = filter->priv;
struct mlx4_spec_list spec_tcp_udp = {
.id = mlx4_ip_proto_to_trans_rule_id(filter->ip_proto),
{
.tcp_udp = {
.dst_port = filter->dst_port,
.dst_port_msk = (__force __be16)-1,
.src_port = filter->src_port,
.src_port_msk = (__force __be16)-1,
},
},
};
struct mlx4_spec_list spec_ip = {
.id = MLX4_NET_TRANS_RULE_ID_IPV4,
{
.ipv4 = {
.dst_ip = filter->dst_ip,
.dst_ip_msk = (__force __be32)-1,
.src_ip = filter->src_ip,
.src_ip_msk = (__force __be32)-1,
},
},
};
struct mlx4_spec_list spec_eth = {
.id = MLX4_NET_TRANS_RULE_ID_ETH,
};
struct mlx4_net_trans_rule rule = {
.list = LIST_HEAD_INIT(rule.list),
.queue_mode = MLX4_NET_TRANS_Q_LIFO,
.exclusive = 1,
.allow_loopback = 1,
.promisc_mode = MLX4_FS_REGULAR,
.port = priv->port,
.priority = MLX4_DOMAIN_RFS,
};
int rc;
__be64 mac_mask = cpu_to_be64(MLX4_MAC_MASK << 16);
if (spec_tcp_udp.id >= MLX4_NET_TRANS_RULE_NUM) {
en_warn(priv, "RFS: ignoring unsupported ip protocol (%d)\n",
filter->ip_proto);
goto ignore;
}
list_add_tail(&spec_eth.list, &rule.list);
list_add_tail(&spec_ip.list, &rule.list);
list_add_tail(&spec_tcp_udp.list, &rule.list);
rule.qpn = priv->rss_map.qps[filter->rxq_index].qpn;
memcpy(spec_eth.eth.dst_mac, priv->dev->dev_addr, ETH_ALEN);
memcpy(spec_eth.eth.dst_mac_msk, &mac_mask, ETH_ALEN);
filter->activated = 0;
if (filter->reg_id) {
rc = mlx4_flow_detach(priv->mdev->dev, filter->reg_id);
if (rc && rc != -ENOENT)
en_err(priv, "Error detaching flow. rc = %d\n", rc);
}
rc = mlx4_flow_attach(priv->mdev->dev, &rule, &filter->reg_id);
if (rc)
en_err(priv, "Error attaching flow. err = %d\n", rc);
ignore:
mlx4_en_filter_rfs_expire(priv);
filter->activated = 1;
}
static inline struct hlist_head *
filter_hash_bucket(struct mlx4_en_priv *priv, __be32 src_ip, __be32 dst_ip,
__be16 src_port, __be16 dst_port)
{
unsigned long l;
int bucket_idx;
l = (__force unsigned long)src_port |
((__force unsigned long)dst_port << 2);
l ^= (__force unsigned long)(src_ip ^ dst_ip);
bucket_idx = hash_long(l, MLX4_EN_FILTER_HASH_SHIFT);
return &priv->filter_hash[bucket_idx];
}
static struct mlx4_en_filter *
mlx4_en_filter_alloc(struct mlx4_en_priv *priv, int rxq_index, __be32 src_ip,
__be32 dst_ip, u8 ip_proto, __be16 src_port,
__be16 dst_port, u32 flow_id)
{
struct mlx4_en_filter *filter = NULL;
filter = kzalloc(sizeof(struct mlx4_en_filter), GFP_ATOMIC);
if (!filter)
return NULL;
filter->priv = priv;
filter->rxq_index = rxq_index;
INIT_WORK(&filter->work, mlx4_en_filter_work);
filter->src_ip = src_ip;
filter->dst_ip = dst_ip;
filter->ip_proto = ip_proto;
filter->src_port = src_port;
filter->dst_port = dst_port;
filter->flow_id = flow_id;
filter->id = priv->last_filter_id++ % RPS_NO_FILTER;
list_add_tail(&filter->next, &priv->filters);
hlist_add_head(&filter->filter_chain,
filter_hash_bucket(priv, src_ip, dst_ip, src_port,
dst_port));
return filter;
}
static void mlx4_en_filter_free(struct mlx4_en_filter *filter)
{
struct mlx4_en_priv *priv = filter->priv;
int rc;
list_del(&filter->next);
rc = mlx4_flow_detach(priv->mdev->dev, filter->reg_id);
if (rc && rc != -ENOENT)
en_err(priv, "Error detaching flow. rc = %d\n", rc);
kfree(filter);
}
static inline struct mlx4_en_filter *
mlx4_en_filter_find(struct mlx4_en_priv *priv, __be32 src_ip, __be32 dst_ip,
u8 ip_proto, __be16 src_port, __be16 dst_port)
{
struct mlx4_en_filter *filter;
struct mlx4_en_filter *ret = NULL;
hlist_for_each_entry(filter,
filter_hash_bucket(priv, src_ip, dst_ip,
src_port, dst_port),
filter_chain) {
if (filter->src_ip == src_ip &&
filter->dst_ip == dst_ip &&
filter->ip_proto == ip_proto &&
filter->src_port == src_port &&
filter->dst_port == dst_port) {
ret = filter;
break;
}
}
return ret;
}
static int
mlx4_en_filter_rfs(struct net_device *net_dev, const struct sk_buff *skb,
u16 rxq_index, u32 flow_id)
{
struct mlx4_en_priv *priv = netdev_priv(net_dev);
struct mlx4_en_filter *filter;
const struct iphdr *ip;
const __be16 *ports;
u8 ip_proto;
__be32 src_ip;
__be32 dst_ip;
__be16 src_port;
__be16 dst_port;
int nhoff = skb_network_offset(skb);
int ret = 0;
if (skb->protocol != htons(ETH_P_IP))
return -EPROTONOSUPPORT;
ip = (const struct iphdr *)(skb->data + nhoff);
if (ip_is_fragment(ip))
return -EPROTONOSUPPORT;
if ((ip->protocol != IPPROTO_TCP) && (ip->protocol != IPPROTO_UDP))
return -EPROTONOSUPPORT;
ports = (const __be16 *)(skb->data + nhoff + 4 * ip->ihl);
ip_proto = ip->protocol;
src_ip = ip->saddr;
dst_ip = ip->daddr;
src_port = ports[0];
dst_port = ports[1];
spin_lock_bh(&priv->filters_lock);
filter = mlx4_en_filter_find(priv, src_ip, dst_ip, ip_proto,
src_port, dst_port);
if (filter) {
if (filter->rxq_index == rxq_index)
goto out;
filter->rxq_index = rxq_index;
} else {
filter = mlx4_en_filter_alloc(priv, rxq_index,
src_ip, dst_ip, ip_proto,
src_port, dst_port, flow_id);
if (!filter) {
ret = -ENOMEM;
goto err;
}
}
queue_work(priv->mdev->workqueue, &filter->work);
out:
ret = filter->id;
err:
spin_unlock_bh(&priv->filters_lock);
return ret;
}
void mlx4_en_cleanup_filters(struct mlx4_en_priv *priv)
{
struct mlx4_en_filter *filter, *tmp;
LIST_HEAD(del_list);
spin_lock_bh(&priv->filters_lock);
list_for_each_entry_safe(filter, tmp, &priv->filters, next) {
list_move(&filter->next, &del_list);
hlist_del(&filter->filter_chain);
}
spin_unlock_bh(&priv->filters_lock);
list_for_each_entry_safe(filter, tmp, &del_list, next) {
cancel_work_sync(&filter->work);
mlx4_en_filter_free(filter);
}
}
static void mlx4_en_filter_rfs_expire(struct mlx4_en_priv *priv)
{
struct mlx4_en_filter *filter = NULL, *tmp, *last_filter = NULL;
LIST_HEAD(del_list);
int i = 0;
spin_lock_bh(&priv->filters_lock);
list_for_each_entry_safe(filter, tmp, &priv->filters, next) {
if (i > MLX4_EN_FILTER_EXPIRY_QUOTA)
break;
if (filter->activated &&
!work_pending(&filter->work) &&
rps_may_expire_flow(priv->dev,
filter->rxq_index, filter->flow_id,
filter->id)) {
list_move(&filter->next, &del_list);
hlist_del(&filter->filter_chain);
} else
last_filter = filter;
i++;
}
if (last_filter && (&last_filter->next != priv->filters.next))
list_move(&priv->filters, &last_filter->next);
spin_unlock_bh(&priv->filters_lock);
list_for_each_entry_safe(filter, tmp, &del_list, next)
mlx4_en_filter_free(filter);
}
#endif
static int mlx4_en_vlan_rx_add_vid(struct net_device *dev,
__be16 proto, u16 vid)
{
struct mlx4_en_priv *priv = netdev_priv(dev);
struct mlx4_en_dev *mdev = priv->mdev;
int err;
int idx;
en_dbg(HW, priv, "adding VLAN:%d\n", vid);
set_bit(vid, priv->active_vlans);
/* Add VID to port VLAN filter */
mutex_lock(&mdev->state_lock);
if (mdev->device_up && priv->port_up) {
err = mlx4_SET_VLAN_FLTR(mdev->dev, priv);
if (err) {
en_err(priv, "Failed configuring VLAN filter\n");
goto out;
}
}
err = mlx4_register_vlan(mdev->dev, priv->port, vid, &idx);
if (err)
en_dbg(HW, priv, "Failed adding vlan %d\n", vid);
out:
mutex_unlock(&mdev->state_lock);
return err;
}
static int mlx4_en_vlan_rx_kill_vid(struct net_device *dev,
__be16 proto, u16 vid)
{
struct mlx4_en_priv *priv = netdev_priv(dev);
struct mlx4_en_dev *mdev = priv->mdev;
int err = 0;
en_dbg(HW, priv, "Killing VID:%d\n", vid);
clear_bit(vid, priv->active_vlans);
/* Remove VID from port VLAN filter */
mutex_lock(&mdev->state_lock);
mlx4_unregister_vlan(mdev->dev, priv->port, vid);
if (mdev->device_up && priv->port_up) {
err = mlx4_SET_VLAN_FLTR(mdev->dev, priv);
if (err)
en_err(priv, "Failed configuring VLAN filter\n");
}
mutex_unlock(&mdev->state_lock);
return err;
}
static void mlx4_en_u64_to_mac(unsigned char dst_mac[ETH_ALEN + 2], u64 src_mac)
{
int i;
for (i = ETH_ALEN - 1; i >= 0; --i) {
dst_mac[i] = src_mac & 0xff;
src_mac >>= 8;
}
memset(&dst_mac[ETH_ALEN], 0, 2);
}
static int mlx4_en_tunnel_steer_add(struct mlx4_en_priv *priv, unsigned char *addr,
int qpn, u64 *reg_id)
{
int err;
if (priv->mdev->dev->caps.tunnel_offload_mode != MLX4_TUNNEL_OFFLOAD_MODE_VXLAN ||
priv->mdev->dev->caps.dmfs_high_steer_mode == MLX4_STEERING_DMFS_A0_STATIC)
return 0; /* do nothing */
err = mlx4_tunnel_steer_add(priv->mdev->dev, addr, priv->port, qpn,
MLX4_DOMAIN_NIC, reg_id);
if (err) {
en_err(priv, "failed to add vxlan steering rule, err %d\n", err);
return err;
}
en_dbg(DRV, priv, "added vxlan steering rule, mac %pM reg_id %llx\n", addr, *reg_id);
return 0;
}
static int mlx4_en_uc_steer_add(struct mlx4_en_priv *priv,
unsigned char *mac, int *qpn, u64 *reg_id)
{
struct mlx4_en_dev *mdev = priv->mdev;
struct mlx4_dev *dev = mdev->dev;
int err;
switch (dev->caps.steering_mode) {
case MLX4_STEERING_MODE_B0: {
struct mlx4_qp qp;
u8 gid[16] = {0};
qp.qpn = *qpn;
memcpy(&gid[10], mac, ETH_ALEN);
gid[5] = priv->port;
err = mlx4_unicast_attach(dev, &qp, gid, 0, MLX4_PROT_ETH);
break;
}
case MLX4_STEERING_MODE_DEVICE_MANAGED: {
struct mlx4_spec_list spec_eth = { {NULL} };
__be64 mac_mask = cpu_to_be64(MLX4_MAC_MASK << 16);
struct mlx4_net_trans_rule rule = {
.queue_mode = MLX4_NET_TRANS_Q_FIFO,
.exclusive = 0,
.allow_loopback = 1,
.promisc_mode = MLX4_FS_REGULAR,
.priority = MLX4_DOMAIN_NIC,
};
rule.port = priv->port;
rule.qpn = *qpn;
INIT_LIST_HEAD(&rule.list);
spec_eth.id = MLX4_NET_TRANS_RULE_ID_ETH;
memcpy(spec_eth.eth.dst_mac, mac, ETH_ALEN);
memcpy(spec_eth.eth.dst_mac_msk, &mac_mask, ETH_ALEN);
list_add_tail(&spec_eth.list, &rule.list);
err = mlx4_flow_attach(dev, &rule, reg_id);
break;
}
default:
return -EINVAL;
}
if (err)
en_warn(priv, "Failed Attaching Unicast\n");
return err;
}
static void mlx4_en_uc_steer_release(struct mlx4_en_priv *priv,
unsigned char *mac, int qpn, u64 reg_id)
{
struct mlx4_en_dev *mdev = priv->mdev;
struct mlx4_dev *dev = mdev->dev;
switch (dev->caps.steering_mode) {
case MLX4_STEERING_MODE_B0: {
struct mlx4_qp qp;
u8 gid[16] = {0};
qp.qpn = qpn;
memcpy(&gid[10], mac, ETH_ALEN);
gid[5] = priv->port;
mlx4_unicast_detach(dev, &qp, gid, MLX4_PROT_ETH);
break;
}
case MLX4_STEERING_MODE_DEVICE_MANAGED: {
mlx4_flow_detach(dev, reg_id);
break;
}
default:
en_err(priv, "Invalid steering mode.\n");
}
}
static int mlx4_en_get_qp(struct mlx4_en_priv *priv)
{
struct mlx4_en_dev *mdev = priv->mdev;
struct mlx4_dev *dev = mdev->dev;
int index = 0;
int err = 0;
int *qpn = &priv->base_qpn;
u64 mac = mlx4_mac_to_u64(priv->dev->dev_addr);
en_dbg(DRV, priv, "Registering MAC: %pM for adding\n",
priv->dev->dev_addr);
index = mlx4_register_mac(dev, priv->port, mac);
if (index < 0) {
err = index;
en_err(priv, "Failed adding MAC: %pM\n",
priv->dev->dev_addr);
return err;
}
if (dev->caps.steering_mode == MLX4_STEERING_MODE_A0) {
int base_qpn = mlx4_get_base_qpn(dev, priv->port);
*qpn = base_qpn + index;
return 0;
}
err = mlx4_qp_reserve_range(dev, 1, 1, qpn, MLX4_RESERVE_A0_QP);
en_dbg(DRV, priv, "Reserved qp %d\n", *qpn);
if (err) {
en_err(priv, "Failed to reserve qp for mac registration\n");
mlx4_unregister_mac(dev, priv->port, mac);
return err;
}
return 0;
}
static void mlx4_en_put_qp(struct mlx4_en_priv *priv)
{
struct mlx4_en_dev *mdev = priv->mdev;
struct mlx4_dev *dev = mdev->dev;
int qpn = priv->base_qpn;
if (dev->caps.steering_mode == MLX4_STEERING_MODE_A0) {
u64 mac = mlx4_mac_to_u64(priv->dev->dev_addr);
en_dbg(DRV, priv, "Registering MAC: %pM for deleting\n",
priv->dev->dev_addr);
mlx4_unregister_mac(dev, priv->port, mac);
} else {
en_dbg(DRV, priv, "Releasing qp: port %d, qpn %d\n",
priv->port, qpn);
mlx4_qp_release_range(dev, qpn, 1);
priv->flags &= ~MLX4_EN_FLAG_FORCE_PROMISC;
}
}
static int mlx4_en_replace_mac(struct mlx4_en_priv *priv, int qpn,
unsigned char *new_mac, unsigned char *prev_mac)
{
struct mlx4_en_dev *mdev = priv->mdev;
struct mlx4_dev *dev = mdev->dev;
int err = 0;
u64 new_mac_u64 = mlx4_mac_to_u64(new_mac);
if (dev->caps.steering_mode != MLX4_STEERING_MODE_A0) {
struct hlist_head *bucket;
unsigned int mac_hash;
struct mlx4_mac_entry *entry;
struct hlist_node *tmp;
u64 prev_mac_u64 = mlx4_mac_to_u64(prev_mac);
bucket = &priv->mac_hash[prev_mac[MLX4_EN_MAC_HASH_IDX]];
hlist_for_each_entry_safe(entry, tmp, bucket, hlist) {
if (ether_addr_equal_64bits(entry->mac, prev_mac)) {
mlx4_en_uc_steer_release(priv, entry->mac,
qpn, entry->reg_id);
mlx4_unregister_mac(dev, priv->port,
prev_mac_u64);
hlist_del_rcu(&entry->hlist);
synchronize_rcu();
memcpy(entry->mac, new_mac, ETH_ALEN);
entry->reg_id = 0;
mac_hash = new_mac[MLX4_EN_MAC_HASH_IDX];
hlist_add_head_rcu(&entry->hlist,
&priv->mac_hash[mac_hash]);
mlx4_register_mac(dev, priv->port, new_mac_u64);
err = mlx4_en_uc_steer_add(priv, new_mac,
&qpn,
&entry->reg_id);
if (err)
return err;
if (priv->tunnel_reg_id) {
mlx4_flow_detach(priv->mdev->dev, priv->tunnel_reg_id);
priv->tunnel_reg_id = 0;
}
err = mlx4_en_tunnel_steer_add(priv, new_mac, qpn,
&priv->tunnel_reg_id);
return err;
}
}
return -EINVAL;
}
return __mlx4_replace_mac(dev, priv->port, qpn, new_mac_u64);
}
static int mlx4_en_do_set_mac(struct mlx4_en_priv *priv,
unsigned char new_mac[ETH_ALEN + 2])
{
int err = 0;
if (priv->port_up) {
/* Remove old MAC and insert the new one */
err = mlx4_en_replace_mac(priv, priv->base_qpn,
new_mac, priv->current_mac);
if (err)
en_err(priv, "Failed changing HW MAC address\n");
} else
en_dbg(HW, priv, "Port is down while registering mac, exiting...\n");
if (!err)
memcpy(priv->current_mac, new_mac, sizeof(priv->current_mac));
return err;
}
static int mlx4_en_set_mac(struct net_device *dev, void *addr)
{
struct mlx4_en_priv *priv = netdev_priv(dev);
struct mlx4_en_dev *mdev = priv->mdev;
struct sockaddr *saddr = addr;
unsigned char new_mac[ETH_ALEN + 2];
int err;
if (!is_valid_ether_addr(saddr->sa_data))
return -EADDRNOTAVAIL;
mutex_lock(&mdev->state_lock);
memcpy(new_mac, saddr->sa_data, ETH_ALEN);
err = mlx4_en_do_set_mac(priv, new_mac);
if (!err)
memcpy(dev->dev_addr, saddr->sa_data, ETH_ALEN);
mutex_unlock(&mdev->state_lock);
return err;
}
static void mlx4_en_clear_list(struct net_device *dev)
{
struct mlx4_en_priv *priv = netdev_priv(dev);
struct mlx4_en_mc_list *tmp, *mc_to_del;
list_for_each_entry_safe(mc_to_del, tmp, &priv->mc_list, list) {
list_del(&mc_to_del->list);
kfree(mc_to_del);
}
}
static void mlx4_en_cache_mclist(struct net_device *dev)
{
struct mlx4_en_priv *priv = netdev_priv(dev);
struct netdev_hw_addr *ha;
struct mlx4_en_mc_list *tmp;
mlx4_en_clear_list(dev);
netdev_for_each_mc_addr(ha, dev) {
tmp = kzalloc(sizeof(struct mlx4_en_mc_list), GFP_ATOMIC);
if (!tmp) {
mlx4_en_clear_list(dev);
return;
}
memcpy(tmp->addr, ha->addr, ETH_ALEN);
list_add_tail(&tmp->list, &priv->mc_list);
}
}
static void update_mclist_flags(struct mlx4_en_priv *priv,
struct list_head *dst,
struct list_head *src)
{
struct mlx4_en_mc_list *dst_tmp, *src_tmp, *new_mc;
bool found;
/* Find all the entries that should be removed from dst,
* These are the entries that are not found in src
*/
list_for_each_entry(dst_tmp, dst, list) {
found = false;
list_for_each_entry(src_tmp, src, list) {
if (ether_addr_equal(dst_tmp->addr, src_tmp->addr)) {
found = true;
break;
}
}
if (!found)
dst_tmp->action = MCLIST_REM;
}
/* Add entries that exist in src but not in dst
* mark them as need to add
*/
list_for_each_entry(src_tmp, src, list) {
found = false;
list_for_each_entry(dst_tmp, dst, list) {
if (ether_addr_equal(dst_tmp->addr, src_tmp->addr)) {
dst_tmp->action = MCLIST_NONE;
found = true;
break;
}
}
if (!found) {
new_mc = kmemdup(src_tmp,
sizeof(struct mlx4_en_mc_list),
GFP_KERNEL);
if (!new_mc)
return;
new_mc->action = MCLIST_ADD;
list_add_tail(&new_mc->list, dst);
}
}
}
static void mlx4_en_set_rx_mode(struct net_device *dev)
{
struct mlx4_en_priv *priv = netdev_priv(dev);
if (!priv->port_up)
return;
queue_work(priv->mdev->workqueue, &priv->rx_mode_task);
}
static void mlx4_en_set_promisc_mode(struct mlx4_en_priv *priv,
struct mlx4_en_dev *mdev)
{
int err = 0;
if (!(priv->flags & MLX4_EN_FLAG_PROMISC)) {
if (netif_msg_rx_status(priv))
en_warn(priv, "Entering promiscuous mode\n");
priv->flags |= MLX4_EN_FLAG_PROMISC;
/* Enable promiscouos mode */
switch (mdev->dev->caps.steering_mode) {
case MLX4_STEERING_MODE_DEVICE_MANAGED:
err = mlx4_flow_steer_promisc_add(mdev->dev,
priv->port,
priv->base_qpn,
MLX4_FS_ALL_DEFAULT);
if (err)
en_err(priv, "Failed enabling promiscuous mode\n");
priv->flags |= MLX4_EN_FLAG_MC_PROMISC;
break;
case MLX4_STEERING_MODE_B0:
err = mlx4_unicast_promisc_add(mdev->dev,
priv->base_qpn,
priv->port);
if (err)
en_err(priv, "Failed enabling unicast promiscuous mode\n");
/* Add the default qp number as multicast
* promisc
*/
if (!(priv->flags & MLX4_EN_FLAG_MC_PROMISC)) {
err = mlx4_multicast_promisc_add(mdev->dev,
priv->base_qpn,
priv->port);
if (err)
en_err(priv, "Failed enabling multicast promiscuous mode\n");
priv->flags |= MLX4_EN_FLAG_MC_PROMISC;
}
break;
case MLX4_STEERING_MODE_A0:
err = mlx4_SET_PORT_qpn_calc(mdev->dev,
priv->port,
priv->base_qpn,
1);
if (err)
en_err(priv, "Failed enabling promiscuous mode\n");
break;
}
/* Disable port multicast filter (unconditionally) */
err = mlx4_SET_MCAST_FLTR(mdev->dev, priv->port, 0,
0, MLX4_MCAST_DISABLE);
if (err)
en_err(priv, "Failed disabling multicast filter\n");
}
}
static void mlx4_en_clear_promisc_mode(struct mlx4_en_priv *priv,
struct mlx4_en_dev *mdev)
{
int err = 0;
if (netif_msg_rx_status(priv))
en_warn(priv, "Leaving promiscuous mode\n");
priv->flags &= ~MLX4_EN_FLAG_PROMISC;
/* Disable promiscouos mode */
switch (mdev->dev->caps.steering_mode) {
case MLX4_STEERING_MODE_DEVICE_MANAGED:
err = mlx4_flow_steer_promisc_remove(mdev->dev,
priv->port,
MLX4_FS_ALL_DEFAULT);
if (err)
en_err(priv, "Failed disabling promiscuous mode\n");
priv->flags &= ~MLX4_EN_FLAG_MC_PROMISC;
break;
case MLX4_STEERING_MODE_B0:
err = mlx4_unicast_promisc_remove(mdev->dev,
priv->base_qpn,
priv->port);
if (err)
en_err(priv, "Failed disabling unicast promiscuous mode\n");
/* Disable Multicast promisc */
if (priv->flags & MLX4_EN_FLAG_MC_PROMISC) {
err = mlx4_multicast_promisc_remove(mdev->dev,
priv->base_qpn,
priv->port);
if (err)
en_err(priv, "Failed disabling multicast promiscuous mode\n");
priv->flags &= ~MLX4_EN_FLAG_MC_PROMISC;
}
break;
case MLX4_STEERING_MODE_A0:
err = mlx4_SET_PORT_qpn_calc(mdev->dev,
priv->port,
priv->base_qpn, 0);
if (err)
en_err(priv, "Failed disabling promiscuous mode\n");
break;
}
}
static void mlx4_en_do_multicast(struct mlx4_en_priv *priv,
struct net_device *dev,
struct mlx4_en_dev *mdev)
{
struct mlx4_en_mc_list *mclist, *tmp;
u64 mcast_addr = 0;
u8 mc_list[16] = {0};
int err = 0;
/* Enable/disable the multicast filter according to IFF_ALLMULTI */
if (dev->flags & IFF_ALLMULTI) {
err = mlx4_SET_MCAST_FLTR(mdev->dev, priv->port, 0,
0, MLX4_MCAST_DISABLE);
if (err)
en_err(priv, "Failed disabling multicast filter\n");
/* Add the default qp number as multicast promisc */
if (!(priv->flags & MLX4_EN_FLAG_MC_PROMISC)) {
switch (mdev->dev->caps.steering_mode) {
case MLX4_STEERING_MODE_DEVICE_MANAGED:
err = mlx4_flow_steer_promisc_add(mdev->dev,
priv->port,
priv->base_qpn,
MLX4_FS_MC_DEFAULT);
break;
case MLX4_STEERING_MODE_B0:
err = mlx4_multicast_promisc_add(mdev->dev,
priv->base_qpn,
priv->port);
break;
case MLX4_STEERING_MODE_A0:
break;
}
if (err)
en_err(priv, "Failed entering multicast promisc mode\n");
priv->flags |= MLX4_EN_FLAG_MC_PROMISC;
}
} else {
/* Disable Multicast promisc */
if (priv->flags & MLX4_EN_FLAG_MC_PROMISC) {
switch (mdev->dev->caps.steering_mode) {
case MLX4_STEERING_MODE_DEVICE_MANAGED:
err = mlx4_flow_steer_promisc_remove(mdev->dev,
priv->port,
MLX4_FS_MC_DEFAULT);
break;
case MLX4_STEERING_MODE_B0:
err = mlx4_multicast_promisc_remove(mdev->dev,
priv->base_qpn,
priv->port);
break;
case MLX4_STEERING_MODE_A0:
break;
}
if (err)
en_err(priv, "Failed disabling multicast promiscuous mode\n");
priv->flags &= ~MLX4_EN_FLAG_MC_PROMISC;
}
err = mlx4_SET_MCAST_FLTR(mdev->dev, priv->port, 0,
0, MLX4_MCAST_DISABLE);
if (err)
en_err(priv, "Failed disabling multicast filter\n");
/* Flush mcast filter and init it with broadcast address */
mlx4_SET_MCAST_FLTR(mdev->dev, priv->port, ETH_BCAST,
1, MLX4_MCAST_CONFIG);
/* Update multicast list - we cache all addresses so they won't
* change while HW is updated holding the command semaphor */
netif_addr_lock_bh(dev);
mlx4_en_cache_mclist(dev);
netif_addr_unlock_bh(dev);
list_for_each_entry(mclist, &priv->mc_list, list) {
mcast_addr = mlx4_mac_to_u64(mclist->addr);
mlx4_SET_MCAST_FLTR(mdev->dev, priv->port,
mcast_addr, 0, MLX4_MCAST_CONFIG);
}
err = mlx4_SET_MCAST_FLTR(mdev->dev, priv->port, 0,
0, MLX4_MCAST_ENABLE);
if (err)
en_err(priv, "Failed enabling multicast filter\n");
update_mclist_flags(priv, &priv->curr_list, &priv->mc_list);
list_for_each_entry_safe(mclist, tmp, &priv->curr_list, list) {
if (mclist->action == MCLIST_REM) {
/* detach this address and delete from list */
memcpy(&mc_list[10], mclist->addr, ETH_ALEN);
mc_list[5] = priv->port;
err = mlx4_multicast_detach(mdev->dev,
&priv->rss_map.indir_qp,
mc_list,
MLX4_PROT_ETH,
mclist->reg_id);
if (err)
en_err(priv, "Fail to detach multicast address\n");
if (mclist->tunnel_reg_id) {
err = mlx4_flow_detach(priv->mdev->dev, mclist->tunnel_reg_id);
if (err)
en_err(priv, "Failed to detach multicast address\n");
}
/* remove from list */
list_del(&mclist->list);
kfree(mclist);
} else if (mclist->action == MCLIST_ADD) {
/* attach the address */
memcpy(&mc_list[10], mclist->addr, ETH_ALEN);
/* needed for B0 steering support */
mc_list[5] = priv->port;
err = mlx4_multicast_attach(mdev->dev,
&priv->rss_map.indir_qp,
mc_list,
priv->port, 0,
MLX4_PROT_ETH,
&mclist->reg_id);
if (err)
en_err(priv, "Fail to attach multicast address\n");
err = mlx4_en_tunnel_steer_add(priv, &mc_list[10], priv->base_qpn,
&mclist->tunnel_reg_id);
if (err)
en_err(priv, "Failed to attach multicast address\n");
}
}
}
}
static void mlx4_en_do_uc_filter(struct mlx4_en_priv *priv,
struct net_device *dev,
struct mlx4_en_dev *mdev)
{
struct netdev_hw_addr *ha;
struct mlx4_mac_entry *entry;
struct hlist_node *tmp;
bool found;
u64 mac;
int err = 0;
struct hlist_head *bucket;
unsigned int i;
int removed = 0;
u32 prev_flags;
/* Note that we do not need to protect our mac_hash traversal with rcu,
* since all modification code is protected by mdev->state_lock
*/
/* find what to remove */
for (i = 0; i < MLX4_EN_MAC_HASH_SIZE; ++i) {
bucket = &priv->mac_hash[i];
hlist_for_each_entry_safe(entry, tmp, bucket, hlist) {
found = false;
netdev_for_each_uc_addr(ha, dev) {
if (ether_addr_equal_64bits(entry->mac,
ha->addr)) {
found = true;
break;
}
}
/* MAC address of the port is not in uc list */
if (ether_addr_equal_64bits(entry->mac,
priv->current_mac))
found = true;
if (!found) {
mac = mlx4_mac_to_u64(entry->mac);
mlx4_en_uc_steer_release(priv, entry->mac,
priv->base_qpn,
entry->reg_id);
mlx4_unregister_mac(mdev->dev, priv->port, mac);
hlist_del_rcu(&entry->hlist);
kfree_rcu(entry, rcu);
en_dbg(DRV, priv, "Removed MAC %pM on port:%d\n",
entry->mac, priv->port);
++removed;
}
}
}
/* if we didn't remove anything, there is no use in trying to add
* again once we are in a forced promisc mode state
*/
if ((priv->flags & MLX4_EN_FLAG_FORCE_PROMISC) && 0 == removed)
return;
prev_flags = priv->flags;
priv->flags &= ~MLX4_EN_FLAG_FORCE_PROMISC;
/* find what to add */
netdev_for_each_uc_addr(ha, dev) {
found = false;
bucket = &priv->mac_hash[ha->addr[MLX4_EN_MAC_HASH_IDX]];
hlist_for_each_entry(entry, bucket, hlist) {
if (ether_addr_equal_64bits(entry->mac, ha->addr)) {
found = true;
break;
}
}
if (!found) {
entry = kmalloc(sizeof(*entry), GFP_KERNEL);
if (!entry) {
en_err(priv, "Failed adding MAC %pM on port:%d (out of memory)\n",
ha->addr, priv->port);
priv->flags |= MLX4_EN_FLAG_FORCE_PROMISC;
break;
}
mac = mlx4_mac_to_u64(ha->addr);
memcpy(entry->mac, ha->addr, ETH_ALEN);
err = mlx4_register_mac(mdev->dev, priv->port, mac);
if (err < 0) {
en_err(priv, "Failed registering MAC %pM on port %d: %d\n",
ha->addr, priv->port, err);
kfree(entry);
priv->flags |= MLX4_EN_FLAG_FORCE_PROMISC;
break;
}
err = mlx4_en_uc_steer_add(priv, ha->addr,
&priv->base_qpn,
&entry->reg_id);
if (err) {
en_err(priv, "Failed adding MAC %pM on port %d: %d\n",
ha->addr, priv->port, err);
mlx4_unregister_mac(mdev->dev, priv->port, mac);
kfree(entry);
priv->flags |= MLX4_EN_FLAG_FORCE_PROMISC;
break;
} else {
unsigned int mac_hash;
en_dbg(DRV, priv, "Added MAC %pM on port:%d\n",
ha->addr, priv->port);
mac_hash = ha->addr[MLX4_EN_MAC_HASH_IDX];
bucket = &priv->mac_hash[mac_hash];
hlist_add_head_rcu(&entry->hlist, bucket);
}
}
}
if (priv->flags & MLX4_EN_FLAG_FORCE_PROMISC) {
en_warn(priv, "Forcing promiscuous mode on port:%d\n",
priv->port);
} else if (prev_flags & MLX4_EN_FLAG_FORCE_PROMISC) {
en_warn(priv, "Stop forcing promiscuous mode on port:%d\n",
priv->port);
}
}
static void mlx4_en_do_set_rx_mode(struct work_struct *work)
{
struct mlx4_en_priv *priv = container_of(work, struct mlx4_en_priv,
rx_mode_task);
struct mlx4_en_dev *mdev = priv->mdev;
struct net_device *dev = priv->dev;
mutex_lock(&mdev->state_lock);
if (!mdev->device_up) {
en_dbg(HW, priv, "Card is not up, ignoring rx mode change.\n");
goto out;
}
if (!priv->port_up) {
en_dbg(HW, priv, "Port is down, ignoring rx mode change.\n");
goto out;
}
if (!netif_carrier_ok(dev)) {
if (!mlx4_en_QUERY_PORT(mdev, priv->port)) {
if (priv->port_state.link_state) {
priv->last_link_state = MLX4_DEV_EVENT_PORT_UP;
netif_carrier_on(dev);
en_dbg(LINK, priv, "Link Up\n");
}
}
}
if (dev->priv_flags & IFF_UNICAST_FLT)
mlx4_en_do_uc_filter(priv, dev, mdev);
/* Promsicuous mode: disable all filters */
if ((dev->flags & IFF_PROMISC) ||
(priv->flags & MLX4_EN_FLAG_FORCE_PROMISC)) {
mlx4_en_set_promisc_mode(priv, mdev);
goto out;
}
/* Not in promiscuous mode */
if (priv->flags & MLX4_EN_FLAG_PROMISC)
mlx4_en_clear_promisc_mode(priv, mdev);
mlx4_en_do_multicast(priv, dev, mdev);
out:
mutex_unlock(&mdev->state_lock);
}
#ifdef CONFIG_NET_POLL_CONTROLLER
static void mlx4_en_netpoll(struct net_device *dev)
{
struct mlx4_en_priv *priv = netdev_priv(dev);
struct mlx4_en_cq *cq;
int i;
for (i = 0; i < priv->tx_ring_num; i++) {
cq = priv->tx_cq[i];
napi_schedule(&cq->napi);
}
}
#endif
static int mlx4_en_set_rss_steer_rules(struct mlx4_en_priv *priv)
{
u64 reg_id;
int err = 0;
int *qpn = &priv->base_qpn;
struct mlx4_mac_entry *entry;
err = mlx4_en_uc_steer_add(priv, priv->dev->dev_addr, qpn, &reg_id);
if (err)
return err;
err = mlx4_en_tunnel_steer_add(priv, priv->dev->dev_addr, *qpn,
&priv->tunnel_reg_id);
if (err)
goto tunnel_err;
entry = kmalloc(sizeof(*entry), GFP_KERNEL);
if (!entry) {
err = -ENOMEM;
goto alloc_err;
}
memcpy(entry->mac, priv->dev->dev_addr, sizeof(entry->mac));
memcpy(priv->current_mac, entry->mac, sizeof(priv->current_mac));
entry->reg_id = reg_id;
hlist_add_head_rcu(&entry->hlist,
&priv->mac_hash[entry->mac[MLX4_EN_MAC_HASH_IDX]]);
return 0;
alloc_err:
if (priv->tunnel_reg_id)
mlx4_flow_detach(priv->mdev->dev, priv->tunnel_reg_id);
tunnel_err:
mlx4_en_uc_steer_release(priv, priv->dev->dev_addr, *qpn, reg_id);
return err;
}
static void mlx4_en_delete_rss_steer_rules(struct mlx4_en_priv *priv)
{
u64 mac;
unsigned int i;
int qpn = priv->base_qpn;
struct hlist_head *bucket;
struct hlist_node *tmp;
struct mlx4_mac_entry *entry;
for (i = 0; i < MLX4_EN_MAC_HASH_SIZE; ++i) {
bucket = &priv->mac_hash[i];
hlist_for_each_entry_safe(entry, tmp, bucket, hlist) {
mac = mlx4_mac_to_u64(entry->mac);
en_dbg(DRV, priv, "Registering MAC:%pM for deleting\n",
entry->mac);
mlx4_en_uc_steer_release(priv, entry->mac,
qpn, entry->reg_id);
mlx4_unregister_mac(priv->mdev->dev, priv->port, mac);
hlist_del_rcu(&entry->hlist);
kfree_rcu(entry, rcu);
}
}
if (priv->tunnel_reg_id) {
mlx4_flow_detach(priv->mdev->dev, priv->tunnel_reg_id);
priv->tunnel_reg_id = 0;
}
}
static void mlx4_en_tx_timeout(struct net_device *dev)
{
struct mlx4_en_priv *priv = netdev_priv(dev);
struct mlx4_en_dev *mdev = priv->mdev;
int i;
if (netif_msg_timer(priv))
en_warn(priv, "Tx timeout called on port:%d\n", priv->port);
for (i = 0; i < priv->tx_ring_num; i++) {
if (!netif_tx_queue_stopped(netdev_get_tx_queue(dev, i)))
continue;
en_warn(priv, "TX timeout on queue: %d, QP: 0x%x, CQ: 0x%x, Cons: 0x%x, Prod: 0x%x\n",
i, priv->tx_ring[i]->qpn, priv->tx_ring[i]->cqn,
priv->tx_ring[i]->cons, priv->tx_ring[i]->prod);
}
priv->port_stats.tx_timeout++;
en_dbg(DRV, priv, "Scheduling watchdog\n");
queue_work(mdev->workqueue, &priv->watchdog_task);
}
static struct rtnl_link_stats64 *
mlx4_en_get_stats64(struct net_device *dev, struct rtnl_link_stats64 *stats)
{
struct mlx4_en_priv *priv = netdev_priv(dev);
spin_lock_bh(&priv->stats_lock);
netdev_stats_to_stats64(stats, &dev->stats);
spin_unlock_bh(&priv->stats_lock);
return stats;
}
static void mlx4_en_set_default_moderation(struct mlx4_en_priv *priv)
{
struct mlx4_en_cq *cq;
int i;
/* If we haven't received a specific coalescing setting
* (module param), we set the moderation parameters as follows:
* - moder_cnt is set to the number of mtu sized packets to
* satisfy our coalescing target.
* - moder_time is set to a fixed value.
*/
priv->rx_frames = MLX4_EN_RX_COAL_TARGET;
priv->rx_usecs = MLX4_EN_RX_COAL_TIME;
priv->tx_frames = MLX4_EN_TX_COAL_PKTS;
priv->tx_usecs = MLX4_EN_TX_COAL_TIME;
en_dbg(INTR, priv, "Default coalesing params for mtu:%d - rx_frames:%d rx_usecs:%d\n",
priv->dev->mtu, priv->rx_frames, priv->rx_usecs);
/* Setup cq moderation params */
for (i = 0; i < priv->rx_ring_num; i++) {
cq = priv->rx_cq[i];
cq->moder_cnt = priv->rx_frames;
cq->moder_time = priv->rx_usecs;
priv->last_moder_time[i] = MLX4_EN_AUTO_CONF;
priv->last_moder_packets[i] = 0;
priv->last_moder_bytes[i] = 0;
}
for (i = 0; i < priv->tx_ring_num; i++) {
cq = priv->tx_cq[i];
cq->moder_cnt = priv->tx_frames;
cq->moder_time = priv->tx_usecs;
}
/* Reset auto-moderation params */
priv->pkt_rate_low = MLX4_EN_RX_RATE_LOW;
priv->rx_usecs_low = MLX4_EN_RX_COAL_TIME_LOW;
priv->pkt_rate_high = MLX4_EN_RX_RATE_HIGH;
priv->rx_usecs_high = MLX4_EN_RX_COAL_TIME_HIGH;
priv->sample_interval = MLX4_EN_SAMPLE_INTERVAL;
priv->adaptive_rx_coal = 1;
priv->last_moder_jiffies = 0;
priv->last_moder_tx_packets = 0;
}
static void mlx4_en_auto_moderation(struct mlx4_en_priv *priv)
{
unsigned long period = (unsigned long) (jiffies - priv->last_moder_jiffies);
struct mlx4_en_cq *cq;
unsigned long packets;
unsigned long rate;
unsigned long avg_pkt_size;
unsigned long rx_packets;
unsigned long rx_bytes;
unsigned long rx_pkt_diff;
int moder_time;
int ring, err;
if (!priv->adaptive_rx_coal || period < priv->sample_interval * HZ)
return;
for (ring = 0; ring < priv->rx_ring_num; ring++) {
spin_lock_bh(&priv->stats_lock);
rx_packets = priv->rx_ring[ring]->packets;
rx_bytes = priv->rx_ring[ring]->bytes;
spin_unlock_bh(&priv->stats_lock);
rx_pkt_diff = ((unsigned long) (rx_packets -
priv->last_moder_packets[ring]));
packets = rx_pkt_diff;
rate = packets * HZ / period;
avg_pkt_size = packets ? ((unsigned long) (rx_bytes -
priv->last_moder_bytes[ring])) / packets : 0;
/* Apply auto-moderation only when packet rate
* exceeds a rate that it matters */
if (rate > (MLX4_EN_RX_RATE_THRESH / priv->rx_ring_num) &&
avg_pkt_size > MLX4_EN_AVG_PKT_SMALL) {
if (rate < priv->pkt_rate_low)
moder_time = priv->rx_usecs_low;
else if (rate > priv->pkt_rate_high)
moder_time = priv->rx_usecs_high;
else
moder_time = (rate - priv->pkt_rate_low) *
(priv->rx_usecs_high - priv->rx_usecs_low) /
(priv->pkt_rate_high - priv->pkt_rate_low) +
priv->rx_usecs_low;
} else {
moder_time = priv->rx_usecs_low;
}
if (moder_time != priv->last_moder_time[ring]) {
priv->last_moder_time[ring] = moder_time;
cq = priv->rx_cq[ring];
cq->moder_time = moder_time;
cq->moder_cnt = priv->rx_frames;
err = mlx4_en_set_cq_moder(priv, cq);
if (err)
en_err(priv, "Failed modifying moderation for cq:%d\n",
ring);
}
priv->last_moder_packets[ring] = rx_packets;
priv->last_moder_bytes[ring] = rx_bytes;
}
priv->last_moder_jiffies = jiffies;
}
static void mlx4_en_do_get_stats(struct work_struct *work)
{
struct delayed_work *delay = to_delayed_work(work);
struct mlx4_en_priv *priv = container_of(delay, struct mlx4_en_priv,
stats_task);
struct mlx4_en_dev *mdev = priv->mdev;
int err;
mutex_lock(&mdev->state_lock);
if (mdev->device_up) {
if (priv->port_up) {
err = mlx4_en_DUMP_ETH_STATS(mdev, priv->port, 0);
if (err)
en_dbg(HW, priv, "Could not update stats\n");
mlx4_en_auto_moderation(priv);
}
queue_delayed_work(mdev->workqueue, &priv->stats_task, STATS_DELAY);
}
if (mdev->mac_removed[MLX4_MAX_PORTS + 1 - priv->port]) {
mlx4_en_do_set_mac(priv, priv->current_mac);
mdev->mac_removed[MLX4_MAX_PORTS + 1 - priv->port] = 0;
}
mutex_unlock(&mdev->state_lock);
}
/* mlx4_en_service_task - Run service task for tasks that needed to be done
* periodically
*/
static void mlx4_en_service_task(struct work_struct *work)
{
struct delayed_work *delay = to_delayed_work(work);
struct mlx4_en_priv *priv = container_of(delay, struct mlx4_en_priv,
service_task);
struct mlx4_en_dev *mdev = priv->mdev;
mutex_lock(&mdev->state_lock);
if (mdev->device_up) {
if (mdev->dev->caps.flags2 & MLX4_DEV_CAP_FLAG2_TS)
mlx4_en_ptp_overflow_check(mdev);
mlx4_en_recover_from_oom(priv);
queue_delayed_work(mdev->workqueue, &priv->service_task,
SERVICE_TASK_DELAY);
}
mutex_unlock(&mdev->state_lock);
}
static void mlx4_en_linkstate(struct work_struct *work)
{
struct mlx4_en_priv *priv = container_of(work, struct mlx4_en_priv,
linkstate_task);
struct mlx4_en_dev *mdev = priv->mdev;
int linkstate = priv->link_state;
mutex_lock(&mdev->state_lock);
/* If observable port state changed set carrier state and
* report to system log */
if (priv->last_link_state != linkstate) {
if (linkstate == MLX4_DEV_EVENT_PORT_DOWN) {
en_info(priv, "Link Down\n");
netif_carrier_off(priv->dev);
} else {
en_info(priv, "Link Up\n");
netif_carrier_on(priv->dev);
}
}
priv->last_link_state = linkstate;
mutex_unlock(&mdev->state_lock);
}
static int mlx4_en_init_affinity_hint(struct mlx4_en_priv *priv, int ring_idx)
{
struct mlx4_en_rx_ring *ring = priv->rx_ring[ring_idx];
int numa_node = priv->mdev->dev->numa_node;
if (!zalloc_cpumask_var(&ring->affinity_mask, GFP_KERNEL))
return -ENOMEM;
cpumask_set_cpu(cpumask_local_spread(ring_idx, numa_node),
ring->affinity_mask);
return 0;
}
static void mlx4_en_free_affinity_hint(struct mlx4_en_priv *priv, int ring_idx)
{
free_cpumask_var(priv->rx_ring[ring_idx]->affinity_mask);
}
static void mlx4_en_init_recycle_ring(struct mlx4_en_priv *priv,
int tx_ring_idx)
{
struct mlx4_en_tx_ring *tx_ring = priv->tx_ring[tx_ring_idx];
int rr_index;
rr_index = (priv->xdp_ring_num - priv->tx_ring_num) + tx_ring_idx;
if (rr_index >= 0) {
tx_ring->free_tx_desc = mlx4_en_recycle_tx_desc;
tx_ring->recycle_ring = priv->rx_ring[rr_index];
en_dbg(DRV, priv,
"Set tx_ring[%d]->recycle_ring = rx_ring[%d]\n",
tx_ring_idx, rr_index);
} else {
tx_ring->recycle_ring = NULL;
}
}
int mlx4_en_start_port(struct net_device *dev)
{
struct mlx4_en_priv *priv = netdev_priv(dev);
struct mlx4_en_dev *mdev = priv->mdev;
struct mlx4_en_cq *cq;
struct mlx4_en_tx_ring *tx_ring;
int rx_index = 0;
int tx_index = 0;
int err = 0;
int i;
int j;
u8 mc_list[16] = {0};
if (priv->port_up) {
en_dbg(DRV, priv, "start port called while port already up\n");
return 0;
}
INIT_LIST_HEAD(&priv->mc_list);
INIT_LIST_HEAD(&priv->curr_list);
INIT_LIST_HEAD(&priv->ethtool_list);
memset(&priv->ethtool_rules[0], 0,
sizeof(struct ethtool_flow_id) * MAX_NUM_OF_FS_RULES);
/* Calculate Rx buf size */
dev->mtu = min(dev->mtu, priv->max_mtu);
mlx4_en_calc_rx_buf(dev);
en_dbg(DRV, priv, "Rx buf size:%d\n", priv->rx_skb_size);
/* Configure rx cq's and rings */
err = mlx4_en_activate_rx_rings(priv);
if (err) {
en_err(priv, "Failed to activate RX rings\n");
return err;
}
for (i = 0; i < priv->rx_ring_num; i++) {
cq = priv->rx_cq[i];
err = mlx4_en_init_affinity_hint(priv, i);
if (err) {
en_err(priv, "Failed preparing IRQ affinity hint\n");
goto cq_err;
}
err = mlx4_en_activate_cq(priv, cq, i);
if (err) {
en_err(priv, "Failed activating Rx CQ\n");
mlx4_en_free_affinity_hint(priv, i);
goto cq_err;
}
for (j = 0; j < cq->size; j++) {
struct mlx4_cqe *cqe = NULL;
cqe = mlx4_en_get_cqe(cq->buf, j, priv->cqe_size) +
priv->cqe_factor;
cqe->owner_sr_opcode = MLX4_CQE_OWNER_MASK;
}
err = mlx4_en_set_cq_moder(priv, cq);
if (err) {
en_err(priv, "Failed setting cq moderation parameters\n");
mlx4_en_deactivate_cq(priv, cq);
mlx4_en_free_affinity_hint(priv, i);
goto cq_err;
}
mlx4_en_arm_cq(priv, cq);
priv->rx_ring[i]->cqn = cq->mcq.cqn;
++rx_index;
}
/* Set qp number */
en_dbg(DRV, priv, "Getting qp number for port %d\n", priv->port);
err = mlx4_en_get_qp(priv);
if (err) {
en_err(priv, "Failed getting eth qp\n");
goto cq_err;
}
mdev->mac_removed[priv->port] = 0;
priv->counter_index =
mlx4_get_default_counter_index(mdev->dev, priv->port);
err = mlx4_en_config_rss_steer(priv);
if (err) {
en_err(priv, "Failed configuring rss steering\n");
goto mac_err;
}
err = mlx4_en_create_drop_qp(priv);
if (err)
goto rss_err;
/* Configure tx cq's and rings */
for (i = 0; i < priv->tx_ring_num; i++) {
/* Configure cq */
cq = priv->tx_cq[i];
err = mlx4_en_activate_cq(priv, cq, i);
if (err) {
en_err(priv, "Failed allocating Tx CQ\n");
goto tx_err;
}
err = mlx4_en_set_cq_moder(priv, cq);
if (err) {
en_err(priv, "Failed setting cq moderation parameters\n");
mlx4_en_deactivate_cq(priv, cq);
goto tx_err;
}
en_dbg(DRV, priv, "Resetting index of collapsed CQ:%d to -1\n", i);
cq->buf->wqe_index = cpu_to_be16(0xffff);
/* Configure ring */
tx_ring = priv->tx_ring[i];
err = mlx4_en_activate_tx_ring(priv, tx_ring, cq->mcq.cqn,
i / priv->num_tx_rings_p_up);
if (err) {
en_err(priv, "Failed allocating Tx ring\n");
mlx4_en_deactivate_cq(priv, cq);
goto tx_err;
}
tx_ring->tx_queue = netdev_get_tx_queue(dev, i);
mlx4_en_init_recycle_ring(priv, i);
/* Arm CQ for TX completions */
mlx4_en_arm_cq(priv, cq);
/* Set initial ownership of all Tx TXBBs to SW (1) */
for (j = 0; j < tx_ring->buf_size; j += STAMP_STRIDE)
*((u32 *) (tx_ring->buf + j)) = 0xffffffff;
++tx_index;
}
/* Configure port */
err = mlx4_SET_PORT_general(mdev->dev, priv->port,
priv->rx_skb_size + ETH_FCS_LEN,
priv->prof->tx_pause,
priv->prof->tx_ppp,
priv->prof->rx_pause,
priv->prof->rx_ppp);
if (err) {
en_err(priv, "Failed setting port general configurations for port %d, with error %d\n",
priv->port, err);
goto tx_err;
}
/* Set default qp number */
err = mlx4_SET_PORT_qpn_calc(mdev->dev, priv->port, priv->base_qpn, 0);
if (err) {
en_err(priv, "Failed setting default qp numbers\n");
goto tx_err;
}
if (mdev->dev->caps.tunnel_offload_mode == MLX4_TUNNEL_OFFLOAD_MODE_VXLAN) {
err = mlx4_SET_PORT_VXLAN(mdev->dev, priv->port, VXLAN_STEER_BY_OUTER_MAC, 1);
if (err) {
en_err(priv, "Failed setting port L2 tunnel configuration, err %d\n",
err);
goto tx_err;
}
}
/* Init port */
en_dbg(HW, priv, "Initializing port\n");
err = mlx4_INIT_PORT(mdev->dev, priv->port);
if (err) {
en_err(priv, "Failed Initializing port\n");
goto tx_err;
}
/* Set Unicast and VXLAN steering rules */
if (mdev->dev->caps.steering_mode != MLX4_STEERING_MODE_A0 &&
mlx4_en_set_rss_steer_rules(priv))
mlx4_warn(mdev, "Failed setting steering rules\n");
/* Attach rx QP to bradcast address */
eth_broadcast_addr(&mc_list[10]);
mc_list[5] = priv->port; /* needed for B0 steering support */
if (mlx4_multicast_attach(mdev->dev, &priv->rss_map.indir_qp, mc_list,
priv->port, 0, MLX4_PROT_ETH,
&priv->broadcast_id))
mlx4_warn(mdev, "Failed Attaching Broadcast\n");
/* Must redo promiscuous mode setup. */
priv->flags &= ~(MLX4_EN_FLAG_PROMISC | MLX4_EN_FLAG_MC_PROMISC);
/* Schedule multicast task to populate multicast list */
queue_work(mdev->workqueue, &priv->rx_mode_task);
if (priv->mdev->dev->caps.tunnel_offload_mode == MLX4_TUNNEL_OFFLOAD_MODE_VXLAN)
udp_tunnel_get_rx_info(dev);
priv->port_up = true;
netif_tx_start_all_queues(dev);
netif_device_attach(dev);
return 0;
tx_err:
while (tx_index--) {
mlx4_en_deactivate_tx_ring(priv, priv->tx_ring[tx_index]);
mlx4_en_deactivate_cq(priv, priv->tx_cq[tx_index]);
}
mlx4_en_destroy_drop_qp(priv);
rss_err:
mlx4_en_release_rss_steer(priv);
mac_err:
mlx4_en_put_qp(priv);
cq_err:
while (rx_index--) {
mlx4_en_deactivate_cq(priv, priv->rx_cq[rx_index]);
mlx4_en_free_affinity_hint(priv, rx_index);
}
for (i = 0; i < priv->rx_ring_num; i++)
mlx4_en_deactivate_rx_ring(priv, priv->rx_ring[i]);
return err; /* need to close devices */
}
void mlx4_en_stop_port(struct net_device *dev, int detach)
{
struct mlx4_en_priv *priv = netdev_priv(dev);
struct mlx4_en_dev *mdev = priv->mdev;
struct mlx4_en_mc_list *mclist, *tmp;
struct ethtool_flow_id *flow, *tmp_flow;
int i;
u8 mc_list[16] = {0};
if (!priv->port_up) {
en_dbg(DRV, priv, "stop port called while port already down\n");
return;
}
/* close port*/
mlx4_CLOSE_PORT(mdev->dev, priv->port);
/* Synchronize with tx routine */
netif_tx_lock_bh(dev);
if (detach)
netif_device_detach(dev);
netif_tx_stop_all_queues(dev);
netif_tx_unlock_bh(dev);
netif_tx_disable(dev);
/* Set port as not active */
priv->port_up = false;
priv->counter_index = MLX4_SINK_COUNTER_INDEX(mdev->dev);
/* Promsicuous mode */
if (mdev->dev->caps.steering_mode ==
MLX4_STEERING_MODE_DEVICE_MANAGED) {
priv->flags &= ~(MLX4_EN_FLAG_PROMISC |
MLX4_EN_FLAG_MC_PROMISC);
mlx4_flow_steer_promisc_remove(mdev->dev,
priv->port,
MLX4_FS_ALL_DEFAULT);
mlx4_flow_steer_promisc_remove(mdev->dev,
priv->port,
MLX4_FS_MC_DEFAULT);
} else if (priv->flags & MLX4_EN_FLAG_PROMISC) {
priv->flags &= ~MLX4_EN_FLAG_PROMISC;
/* Disable promiscouos mode */
mlx4_unicast_promisc_remove(mdev->dev, priv->base_qpn,
priv->port);
/* Disable Multicast promisc */
if (priv->flags & MLX4_EN_FLAG_MC_PROMISC) {
mlx4_multicast_promisc_remove(mdev->dev, priv->base_qpn,
priv->port);
priv->flags &= ~MLX4_EN_FLAG_MC_PROMISC;
}
}
/* Detach All multicasts */
eth_broadcast_addr(&mc_list[10]);
mc_list[5] = priv->port; /* needed for B0 steering support */
mlx4_multicast_detach(mdev->dev, &priv->rss_map.indir_qp, mc_list,
MLX4_PROT_ETH, priv->broadcast_id);
list_for_each_entry(mclist, &priv->curr_list, list) {
memcpy(&mc_list[10], mclist->addr, ETH_ALEN);
mc_list[5] = priv->port;
mlx4_multicast_detach(mdev->dev, &priv->rss_map.indir_qp,
mc_list, MLX4_PROT_ETH, mclist->reg_id);
if (mclist->tunnel_reg_id)
mlx4_flow_detach(mdev->dev, mclist->tunnel_reg_id);
}
mlx4_en_clear_list(dev);
list_for_each_entry_safe(mclist, tmp, &priv->curr_list, list) {
list_del(&mclist->list);
kfree(mclist);
}
/* Flush multicast filter */
mlx4_SET_MCAST_FLTR(mdev->dev, priv->port, 0, 1, MLX4_MCAST_CONFIG);
/* Remove flow steering rules for the port*/
if (mdev->dev->caps.steering_mode ==
MLX4_STEERING_MODE_DEVICE_MANAGED) {
ASSERT_RTNL();
list_for_each_entry_safe(flow, tmp_flow,
&priv->ethtool_list, list) {
mlx4_flow_detach(mdev->dev, flow->id);
list_del(&flow->list);
}
}
mlx4_en_destroy_drop_qp(priv);
/* Free TX Rings */
for (i = 0; i < priv->tx_ring_num; i++) {
mlx4_en_deactivate_tx_ring(priv, priv->tx_ring[i]);
mlx4_en_deactivate_cq(priv, priv->tx_cq[i]);
}
msleep(10);
for (i = 0; i < priv->tx_ring_num; i++)
mlx4_en_free_tx_buf(dev, priv->tx_ring[i]);
if (mdev->dev->caps.steering_mode != MLX4_STEERING_MODE_A0)
mlx4_en_delete_rss_steer_rules(priv);
/* Free RSS qps */
mlx4_en_release_rss_steer(priv);
/* Unregister Mac address for the port */
mlx4_en_put_qp(priv);
if (!(mdev->dev->caps.flags2 & MLX4_DEV_CAP_FLAG2_REASSIGN_MAC_EN))
mdev->mac_removed[priv->port] = 1;
/* Free RX Rings */
for (i = 0; i < priv->rx_ring_num; i++) {
struct mlx4_en_cq *cq = priv->rx_cq[i];
napi_synchronize(&cq->napi);
mlx4_en_deactivate_rx_ring(priv, priv->rx_ring[i]);
mlx4_en_deactivate_cq(priv, cq);
mlx4_en_free_affinity_hint(priv, i);
}
}
static void mlx4_en_restart(struct work_struct *work)
{
struct mlx4_en_priv *priv = container_of(work, struct mlx4_en_priv,
watchdog_task);
struct mlx4_en_dev *mdev = priv->mdev;
struct net_device *dev = priv->dev;
en_dbg(DRV, priv, "Watchdog task called for port %d\n", priv->port);
rtnl_lock();
mutex_lock(&mdev->state_lock);
if (priv->port_up) {
mlx4_en_stop_port(dev, 1);
if (mlx4_en_start_port(dev))
en_err(priv, "Failed restarting port %d\n", priv->port);
}
mutex_unlock(&mdev->state_lock);
rtnl_unlock();
}
static void mlx4_en_clear_stats(struct net_device *dev)
{
struct mlx4_en_priv *priv = netdev_priv(dev);
struct mlx4_en_dev *mdev = priv->mdev;
int i;
if (mlx4_en_DUMP_ETH_STATS(mdev, priv->port, 1))
en_dbg(HW, priv, "Failed dumping statistics\n");
memset(&priv->pstats, 0, sizeof(priv->pstats));
memset(&priv->pkstats, 0, sizeof(priv->pkstats));
memset(&priv->port_stats, 0, sizeof(priv->port_stats));
memset(&priv->rx_flowstats, 0, sizeof(priv->rx_flowstats));
memset(&priv->tx_flowstats, 0, sizeof(priv->tx_flowstats));
memset(&priv->rx_priority_flowstats, 0,
sizeof(priv->rx_priority_flowstats));
memset(&priv->tx_priority_flowstats, 0,
sizeof(priv->tx_priority_flowstats));
memset(&priv->pf_stats, 0, sizeof(priv->pf_stats));
for (i = 0; i < priv->tx_ring_num; i++) {
priv->tx_ring[i]->bytes = 0;
priv->tx_ring[i]->packets = 0;
priv->tx_ring[i]->tx_csum = 0;
priv->tx_ring[i]->tx_dropped = 0;
priv->tx_ring[i]->queue_stopped = 0;
priv->tx_ring[i]->wake_queue = 0;
priv->tx_ring[i]->tso_packets = 0;
priv->tx_ring[i]->xmit_more = 0;
}
for (i = 0; i < priv->rx_ring_num; i++) {
priv->rx_ring[i]->bytes = 0;
priv->rx_ring[i]->packets = 0;
priv->rx_ring[i]->csum_ok = 0;
priv->rx_ring[i]->csum_none = 0;
priv->rx_ring[i]->csum_complete = 0;
}
}
static int mlx4_en_open(struct net_device *dev)
{
struct mlx4_en_priv *priv = netdev_priv(dev);
struct mlx4_en_dev *mdev = priv->mdev;
int err = 0;
mutex_lock(&mdev->state_lock);
if (!mdev->device_up) {
en_err(priv, "Cannot open - device down/disabled\n");
err = -EBUSY;
goto out;
}
/* Reset HW statistics and SW counters */
mlx4_en_clear_stats(dev);
err = mlx4_en_start_port(dev);
if (err)
en_err(priv, "Failed starting port:%d\n", priv->port);
out:
mutex_unlock(&mdev->state_lock);
return err;
}
static int mlx4_en_close(struct net_device *dev)
{
struct mlx4_en_priv *priv = netdev_priv(dev);
struct mlx4_en_dev *mdev = priv->mdev;
en_dbg(IFDOWN, priv, "Close port called\n");
mutex_lock(&mdev->state_lock);
mlx4_en_stop_port(dev, 0);
netif_carrier_off(dev);
mutex_unlock(&mdev->state_lock);
return 0;
}
static void mlx4_en_free_resources(struct mlx4_en_priv *priv)
{
int i;
#ifdef CONFIG_RFS_ACCEL
priv->dev->rx_cpu_rmap = NULL;
#endif
for (i = 0; i < priv->tx_ring_num; i++) {
if (priv->tx_ring && priv->tx_ring[i])
mlx4_en_destroy_tx_ring(priv, &priv->tx_ring[i]);
if (priv->tx_cq && priv->tx_cq[i])
mlx4_en_destroy_cq(priv, &priv->tx_cq[i]);
}
for (i = 0; i < priv->rx_ring_num; i++) {
if (priv->rx_ring[i])
mlx4_en_destroy_rx_ring(priv, &priv->rx_ring[i],
priv->prof->rx_ring_size, priv->stride);
if (priv->rx_cq[i])
mlx4_en_destroy_cq(priv, &priv->rx_cq[i]);
}
}
static int mlx4_en_alloc_resources(struct mlx4_en_priv *priv)
{
struct mlx4_en_port_profile *prof = priv->prof;
int i;
int node;
/* Create tx Rings */
for (i = 0; i < priv->tx_ring_num; i++) {
node = cpu_to_node(i % num_online_cpus());
if (mlx4_en_create_cq(priv, &priv->tx_cq[i],
prof->tx_ring_size, i, TX, node))
goto err;
if (mlx4_en_create_tx_ring(priv, &priv->tx_ring[i],
prof->tx_ring_size, TXBB_SIZE,
node, i))
goto err;
}
/* Create rx Rings */
for (i = 0; i < priv->rx_ring_num; i++) {
node = cpu_to_node(i % num_online_cpus());
if (mlx4_en_create_cq(priv, &priv->rx_cq[i],
prof->rx_ring_size, i, RX, node))
goto err;
if (mlx4_en_create_rx_ring(priv, &priv->rx_ring[i],
prof->rx_ring_size, priv->stride,
node))
goto err;
}
#ifdef CONFIG_RFS_ACCEL
priv->dev->rx_cpu_rmap = mlx4_get_cpu_rmap(priv->mdev->dev, priv->port);
#endif
return 0;
err:
en_err(priv, "Failed to allocate NIC resources\n");
for (i = 0; i < priv->rx_ring_num; i++) {
if (priv->rx_ring[i])
mlx4_en_destroy_rx_ring(priv, &priv->rx_ring[i],
prof->rx_ring_size,
priv->stride);
if (priv->rx_cq[i])
mlx4_en_destroy_cq(priv, &priv->rx_cq[i]);
}
for (i = 0; i < priv->tx_ring_num; i++) {
if (priv->tx_ring[i])
mlx4_en_destroy_tx_ring(priv, &priv->tx_ring[i]);
if (priv->tx_cq[i])
mlx4_en_destroy_cq(priv, &priv->tx_cq[i]);
}
return -ENOMEM;
}
static void mlx4_en_shutdown(struct net_device *dev)
{
rtnl_lock();
netif_device_detach(dev);
mlx4_en_close(dev);
rtnl_unlock();
}
static int mlx4_en_copy_priv(struct mlx4_en_priv *dst,
struct mlx4_en_priv *src,
struct mlx4_en_port_profile *prof)
{
memcpy(&dst->hwtstamp_config, &prof->hwtstamp_config,
sizeof(dst->hwtstamp_config));
dst->num_tx_rings_p_up = src->mdev->profile.num_tx_rings_p_up;
dst->tx_ring_num = prof->tx_ring_num;
dst->rx_ring_num = prof->rx_ring_num;
dst->flags = prof->flags;
dst->mdev = src->mdev;
dst->port = src->port;
dst->dev = src->dev;
dst->prof = prof;
dst->stride = roundup_pow_of_two(sizeof(struct mlx4_en_rx_desc) +
DS_SIZE * MLX4_EN_MAX_RX_FRAGS);
dst->tx_ring = kzalloc(sizeof(struct mlx4_en_tx_ring *) * MAX_TX_RINGS,
GFP_KERNEL);
if (!dst->tx_ring)
return -ENOMEM;
dst->tx_cq = kzalloc(sizeof(struct mlx4_en_cq *) * MAX_TX_RINGS,
GFP_KERNEL);
if (!dst->tx_cq) {
kfree(dst->tx_ring);
return -ENOMEM;
}
return 0;
}
static void mlx4_en_update_priv(struct mlx4_en_priv *dst,
struct mlx4_en_priv *src)
{
memcpy(dst->rx_ring, src->rx_ring,
sizeof(struct mlx4_en_rx_ring *) * src->rx_ring_num);
memcpy(dst->rx_cq, src->rx_cq,
sizeof(struct mlx4_en_cq *) * src->rx_ring_num);
memcpy(&dst->hwtstamp_config, &src->hwtstamp_config,
sizeof(dst->hwtstamp_config));
dst->tx_ring_num = src->tx_ring_num;
dst->rx_ring_num = src->rx_ring_num;
dst->tx_ring = src->tx_ring;
dst->tx_cq = src->tx_cq;
memcpy(dst->prof, src->prof, sizeof(struct mlx4_en_port_profile));
}
int mlx4_en_try_alloc_resources(struct mlx4_en_priv *priv,
struct mlx4_en_priv *tmp,
struct mlx4_en_port_profile *prof)
{
mlx4_en_copy_priv(tmp, priv, prof);
if (mlx4_en_alloc_resources(tmp)) {
en_warn(priv,
"%s: Resource allocation failed, using previous configuration\n",
__func__);
kfree(tmp->tx_ring);
kfree(tmp->tx_cq);
return -ENOMEM;
}
return 0;
}
void mlx4_en_safe_replace_resources(struct mlx4_en_priv *priv,
struct mlx4_en_priv *tmp)
{
mlx4_en_free_resources(priv);
mlx4_en_update_priv(priv, tmp);
}
void mlx4_en_destroy_netdev(struct net_device *dev)
{
struct mlx4_en_priv *priv = netdev_priv(dev);
struct mlx4_en_dev *mdev = priv->mdev;
bool shutdown = mdev->dev->persist->interface_state &
MLX4_INTERFACE_STATE_SHUTDOWN;
en_dbg(DRV, priv, "Destroying netdev on port:%d\n", priv->port);
/* Unregister device - this will close the port if it was up */
if (priv->registered) {
devlink_port_type_clear(mlx4_get_devlink_port(mdev->dev,
priv->port));
if (shutdown)
mlx4_en_shutdown(dev);
else
unregister_netdev(dev);
}
if (priv->allocated)
mlx4_free_hwq_res(mdev->dev, &priv->res, MLX4_EN_PAGE_SIZE);
cancel_delayed_work(&priv->stats_task);
cancel_delayed_work(&priv->service_task);
/* flush any pending task for this netdev */
flush_workqueue(mdev->workqueue);
if (mdev->dev->caps.flags2 & MLX4_DEV_CAP_FLAG2_TS)
mlx4_en_remove_timestamp(mdev);
/* Detach the netdev so tasks would not attempt to access it */
mutex_lock(&mdev->state_lock);
mdev->pndev[priv->port] = NULL;
mdev->upper[priv->port] = NULL;
mutex_unlock(&mdev->state_lock);
#ifdef CONFIG_RFS_ACCEL
mlx4_en_cleanup_filters(priv);
#endif
mlx4_en_free_resources(priv);
kfree(priv->tx_ring);
kfree(priv->tx_cq);
if (!shutdown)
free_netdev(dev);
}
static int mlx4_en_change_mtu(struct net_device *dev, int new_mtu)
{
struct mlx4_en_priv *priv = netdev_priv(dev);
struct mlx4_en_dev *mdev = priv->mdev;
int err = 0;
en_dbg(DRV, priv, "Change MTU called - current:%d new:%d\n",
dev->mtu, new_mtu);
if ((new_mtu < MLX4_EN_MIN_MTU) || (new_mtu > priv->max_mtu)) {
en_err(priv, "Bad MTU size:%d.\n", new_mtu);
return -EPERM;
}
if (priv->xdp_ring_num && MLX4_EN_EFF_MTU(new_mtu) > FRAG_SZ0) {
en_err(priv, "MTU size:%d requires frags but XDP running\n",
new_mtu);
return -EOPNOTSUPP;
}
dev->mtu = new_mtu;
if (netif_running(dev)) {
mutex_lock(&mdev->state_lock);
if (!mdev->device_up) {
/* NIC is probably restarting - let watchdog task reset
* the port */
en_dbg(DRV, priv, "Change MTU called with card down!?\n");
} else {
mlx4_en_stop_port(dev, 1);
err = mlx4_en_start_port(dev);
if (err) {
en_err(priv, "Failed restarting port:%d\n",
priv->port);
queue_work(mdev->workqueue, &priv->watchdog_task);
}
}
mutex_unlock(&mdev->state_lock);
}
return 0;
}
static int mlx4_en_hwtstamp_set(struct net_device *dev, struct ifreq *ifr)
{
struct mlx4_en_priv *priv = netdev_priv(dev);
struct mlx4_en_dev *mdev = priv->mdev;
struct hwtstamp_config config;
if (copy_from_user(&config, ifr->ifr_data, sizeof(config)))
return -EFAULT;
/* reserved for future extensions */
if (config.flags)
return -EINVAL;
/* device doesn't support time stamping */
if (!(mdev->dev->caps.flags2 & MLX4_DEV_CAP_FLAG2_TS))
return -EINVAL;
/* TX HW timestamp */
switch (config.tx_type) {
case HWTSTAMP_TX_OFF:
case HWTSTAMP_TX_ON:
break;
default:
return -ERANGE;
}
/* RX HW timestamp */
switch (config.rx_filter) {
case HWTSTAMP_FILTER_NONE:
break;
case HWTSTAMP_FILTER_ALL:
case HWTSTAMP_FILTER_SOME:
case HWTSTAMP_FILTER_PTP_V1_L4_EVENT:
case HWTSTAMP_FILTER_PTP_V1_L4_SYNC:
case HWTSTAMP_FILTER_PTP_V1_L4_DELAY_REQ:
case HWTSTAMP_FILTER_PTP_V2_L4_EVENT:
case HWTSTAMP_FILTER_PTP_V2_L4_SYNC:
case HWTSTAMP_FILTER_PTP_V2_L4_DELAY_REQ:
case HWTSTAMP_FILTER_PTP_V2_L2_EVENT:
case HWTSTAMP_FILTER_PTP_V2_L2_SYNC:
case HWTSTAMP_FILTER_PTP_V2_L2_DELAY_REQ:
case HWTSTAMP_FILTER_PTP_V2_EVENT:
case HWTSTAMP_FILTER_PTP_V2_SYNC:
case HWTSTAMP_FILTER_PTP_V2_DELAY_REQ:
config.rx_filter = HWTSTAMP_FILTER_ALL;
break;
default:
return -ERANGE;
}
if (mlx4_en_reset_config(dev, config, dev->features)) {
config.tx_type = HWTSTAMP_TX_OFF;
config.rx_filter = HWTSTAMP_FILTER_NONE;
}
return copy_to_user(ifr->ifr_data, &config,
sizeof(config)) ? -EFAULT : 0;
}
static int mlx4_en_hwtstamp_get(struct net_device *dev, struct ifreq *ifr)
{
struct mlx4_en_priv *priv = netdev_priv(dev);
return copy_to_user(ifr->ifr_data, &priv->hwtstamp_config,
sizeof(priv->hwtstamp_config)) ? -EFAULT : 0;
}
static int mlx4_en_ioctl(struct net_device *dev, struct ifreq *ifr, int cmd)
{
switch (cmd) {
case SIOCSHWTSTAMP:
return mlx4_en_hwtstamp_set(dev, ifr);
case SIOCGHWTSTAMP:
return mlx4_en_hwtstamp_get(dev, ifr);
default:
return -EOPNOTSUPP;
}
}
static netdev_features_t mlx4_en_fix_features(struct net_device *netdev,
netdev_features_t features)
{
struct mlx4_en_priv *en_priv = netdev_priv(netdev);
struct mlx4_en_dev *mdev = en_priv->mdev;
/* Since there is no support for separate RX C-TAG/S-TAG vlan accel
* enable/disable make sure S-TAG flag is always in same state as
* C-TAG.
*/
if (features & NETIF_F_HW_VLAN_CTAG_RX &&
!(mdev->dev->caps.flags2 & MLX4_DEV_CAP_FLAG2_SKIP_OUTER_VLAN))
features |= NETIF_F_HW_VLAN_STAG_RX;
else
features &= ~NETIF_F_HW_VLAN_STAG_RX;
return features;
}
static int mlx4_en_set_features(struct net_device *netdev,
netdev_features_t features)
{
struct mlx4_en_priv *priv = netdev_priv(netdev);
bool reset = false;
int ret = 0;
if (DEV_FEATURE_CHANGED(netdev, features, NETIF_F_RXFCS)) {
en_info(priv, "Turn %s RX-FCS\n",
(features & NETIF_F_RXFCS) ? "ON" : "OFF");
reset = true;
}
if (DEV_FEATURE_CHANGED(netdev, features, NETIF_F_RXALL)) {
u8 ignore_fcs_value = (features & NETIF_F_RXALL) ? 1 : 0;
en_info(priv, "Turn %s RX-ALL\n",
ignore_fcs_value ? "ON" : "OFF");
ret = mlx4_SET_PORT_fcs_check(priv->mdev->dev,
priv->port, ignore_fcs_value);
if (ret)
return ret;
}
if (DEV_FEATURE_CHANGED(netdev, features, NETIF_F_HW_VLAN_CTAG_RX)) {
en_info(priv, "Turn %s RX vlan strip offload\n",
(features & NETIF_F_HW_VLAN_CTAG_RX) ? "ON" : "OFF");
reset = true;
}
if (DEV_FEATURE_CHANGED(netdev, features, NETIF_F_HW_VLAN_CTAG_TX))
en_info(priv, "Turn %s TX vlan strip offload\n",
(features & NETIF_F_HW_VLAN_CTAG_TX) ? "ON" : "OFF");
if (DEV_FEATURE_CHANGED(netdev, features, NETIF_F_HW_VLAN_STAG_TX))
en_info(priv, "Turn %s TX S-VLAN strip offload\n",
(features & NETIF_F_HW_VLAN_STAG_TX) ? "ON" : "OFF");
if (DEV_FEATURE_CHANGED(netdev, features, NETIF_F_LOOPBACK)) {
en_info(priv, "Turn %s loopback\n",
(features & NETIF_F_LOOPBACK) ? "ON" : "OFF");
mlx4_en_update_loopback_state(netdev, features);
}
if (reset) {
ret = mlx4_en_reset_config(netdev, priv->hwtstamp_config,
features);
if (ret)
return ret;
}
return 0;
}
static int mlx4_en_set_vf_mac(struct net_device *dev, int queue, u8 *mac)
{
struct mlx4_en_priv *en_priv = netdev_priv(dev);
struct mlx4_en_dev *mdev = en_priv->mdev;
u64 mac_u64 = mlx4_mac_to_u64(mac);
if (is_multicast_ether_addr(mac))
return -EINVAL;
return mlx4_set_vf_mac(mdev->dev, en_priv->port, queue, mac_u64);
}
static int mlx4_en_set_vf_vlan(struct net_device *dev, int vf, u16 vlan, u8 qos)
{
struct mlx4_en_priv *en_priv = netdev_priv(dev);
struct mlx4_en_dev *mdev = en_priv->mdev;
return mlx4_set_vf_vlan(mdev->dev, en_priv->port, vf, vlan, qos);
}
static int mlx4_en_set_vf_rate(struct net_device *dev, int vf, int min_tx_rate,
int max_tx_rate)
{
struct mlx4_en_priv *en_priv = netdev_priv(dev);
struct mlx4_en_dev *mdev = en_priv->mdev;
return mlx4_set_vf_rate(mdev->dev, en_priv->port, vf, min_tx_rate,
max_tx_rate);
}
static int mlx4_en_set_vf_spoofchk(struct net_device *dev, int vf, bool setting)
{
struct mlx4_en_priv *en_priv = netdev_priv(dev);
struct mlx4_en_dev *mdev = en_priv->mdev;
return mlx4_set_vf_spoofchk(mdev->dev, en_priv->port, vf, setting);
}
static int mlx4_en_get_vf_config(struct net_device *dev, int vf, struct ifla_vf_info *ivf)
{
struct mlx4_en_priv *en_priv = netdev_priv(dev);
struct mlx4_en_dev *mdev = en_priv->mdev;
return mlx4_get_vf_config(mdev->dev, en_priv->port, vf, ivf);
}
static int mlx4_en_set_vf_link_state(struct net_device *dev, int vf, int link_state)
{
struct mlx4_en_priv *en_priv = netdev_priv(dev);
struct mlx4_en_dev *mdev = en_priv->mdev;
return mlx4_set_vf_link_state(mdev->dev, en_priv->port, vf, link_state);
}
static int mlx4_en_get_vf_stats(struct net_device *dev, int vf,
struct ifla_vf_stats *vf_stats)
{
struct mlx4_en_priv *en_priv = netdev_priv(dev);
struct mlx4_en_dev *mdev = en_priv->mdev;
return mlx4_get_vf_stats(mdev->dev, en_priv->port, vf, vf_stats);
}
#define PORT_ID_BYTE_LEN 8
static int mlx4_en_get_phys_port_id(struct net_device *dev,
struct netdev_phys_item_id *ppid)
{
struct mlx4_en_priv *priv = netdev_priv(dev);
struct mlx4_dev *mdev = priv->mdev->dev;
int i;
u64 phys_port_id = mdev->caps.phys_port_id[priv->port];
if (!phys_port_id)
return -EOPNOTSUPP;
ppid->id_len = sizeof(phys_port_id);
for (i = PORT_ID_BYTE_LEN - 1; i >= 0; --i) {
ppid->id[i] = phys_port_id & 0xff;
phys_port_id >>= 8;
}
return 0;
}
static void mlx4_en_add_vxlan_offloads(struct work_struct *work)
{
int ret;
struct mlx4_en_priv *priv = container_of(work, struct mlx4_en_priv,
vxlan_add_task);
ret = mlx4_config_vxlan_port(priv->mdev->dev, priv->vxlan_port);
if (ret)
goto out;
ret = mlx4_SET_PORT_VXLAN(priv->mdev->dev, priv->port,
VXLAN_STEER_BY_OUTER_MAC, 1);
out:
if (ret) {
en_err(priv, "failed setting L2 tunnel configuration ret %d\n", ret);
return;
}
/* set offloads */
priv->dev->hw_enc_features |= NETIF_F_IP_CSUM | NETIF_F_IPV6_CSUM |
NETIF_F_RXCSUM |
NETIF_F_TSO | NETIF_F_TSO6 |
NETIF_F_GSO_UDP_TUNNEL |
NETIF_F_GSO_UDP_TUNNEL_CSUM |
NETIF_F_GSO_PARTIAL;
}
static void mlx4_en_del_vxlan_offloads(struct work_struct *work)
{
int ret;
struct mlx4_en_priv *priv = container_of(work, struct mlx4_en_priv,
vxlan_del_task);
/* unset offloads */
priv->dev->hw_enc_features &= ~(NETIF_F_IP_CSUM | NETIF_F_IPV6_CSUM |
NETIF_F_RXCSUM |
NETIF_F_TSO | NETIF_F_TSO6 |
NETIF_F_GSO_UDP_TUNNEL |
NETIF_F_GSO_UDP_TUNNEL_CSUM |
NETIF_F_GSO_PARTIAL);
ret = mlx4_SET_PORT_VXLAN(priv->mdev->dev, priv->port,
VXLAN_STEER_BY_OUTER_MAC, 0);
if (ret)
en_err(priv, "failed setting L2 tunnel configuration ret %d\n", ret);
priv->vxlan_port = 0;
}
static void mlx4_en_add_vxlan_port(struct net_device *dev,
struct udp_tunnel_info *ti)
{
struct mlx4_en_priv *priv = netdev_priv(dev);
__be16 port = ti->port;
__be16 current_port;
if (ti->type != UDP_TUNNEL_TYPE_VXLAN)
return;
if (ti->sa_family != AF_INET)
return;
if (priv->mdev->dev->caps.tunnel_offload_mode != MLX4_TUNNEL_OFFLOAD_MODE_VXLAN)
return;
current_port = priv->vxlan_port;
if (current_port && current_port != port) {
en_warn(priv, "vxlan port %d configured, can't add port %d\n",
ntohs(current_port), ntohs(port));
return;
}
priv->vxlan_port = port;
queue_work(priv->mdev->workqueue, &priv->vxlan_add_task);
}
static void mlx4_en_del_vxlan_port(struct net_device *dev,
struct udp_tunnel_info *ti)
{
struct mlx4_en_priv *priv = netdev_priv(dev);
__be16 port = ti->port;
__be16 current_port;
if (ti->type != UDP_TUNNEL_TYPE_VXLAN)
return;
if (ti->sa_family != AF_INET)
return;
if (priv->mdev->dev->caps.tunnel_offload_mode != MLX4_TUNNEL_OFFLOAD_MODE_VXLAN)
return;
current_port = priv->vxlan_port;
if (current_port != port) {
en_dbg(DRV, priv, "vxlan port %d isn't configured, ignoring\n", ntohs(port));
return;
}
queue_work(priv->mdev->workqueue, &priv->vxlan_del_task);
}
static netdev_features_t mlx4_en_features_check(struct sk_buff *skb,
struct net_device *dev,
netdev_features_t features)
{
features = vlan_features_check(skb, features);
features = vxlan_features_check(skb, features);
/* The ConnectX-3 doesn't support outer IPv6 checksums but it does
* support inner IPv6 checksums and segmentation so we need to
* strip that feature if this is an IPv6 encapsulated frame.
*/
if (skb->encapsulation &&
(skb->ip_summed == CHECKSUM_PARTIAL)) {
struct mlx4_en_priv *priv = netdev_priv(dev);
if (!priv->vxlan_port ||
(ip_hdr(skb)->version != 4) ||
(udp_hdr(skb)->dest != priv->vxlan_port))
features &= ~(NETIF_F_CSUM_MASK | NETIF_F_GSO_MASK);
}
return features;
}
static int mlx4_en_set_tx_maxrate(struct net_device *dev, int queue_index, u32 maxrate)
{
struct mlx4_en_priv *priv = netdev_priv(dev);
struct mlx4_en_tx_ring *tx_ring = priv->tx_ring[queue_index];
struct mlx4_update_qp_params params;
int err;
if (!(priv->mdev->dev->caps.flags2 & MLX4_DEV_CAP_FLAG2_QP_RATE_LIMIT))
return -EOPNOTSUPP;
/* rate provided to us in Mbs, check if it fits into 12 bits, if not use Gbs */
if (maxrate >> 12) {
params.rate_unit = MLX4_QP_RATE_LIMIT_GBS;
params.rate_val = maxrate / 1000;
} else if (maxrate) {
params.rate_unit = MLX4_QP_RATE_LIMIT_MBS;
params.rate_val = maxrate;
} else { /* zero serves to revoke the QP rate-limitation */
params.rate_unit = 0;
params.rate_val = 0;
}
err = mlx4_update_qp(priv->mdev->dev, tx_ring->qpn, MLX4_UPDATE_QP_RATE_LIMIT,
&params);
return err;
}
static int mlx4_xdp_set(struct net_device *dev, struct bpf_prog *prog)
{
struct mlx4_en_priv *priv = netdev_priv(dev);
struct mlx4_en_dev *mdev = priv->mdev;
struct bpf_prog *old_prog;
int xdp_ring_num;
int port_up = 0;
int err;
int i;
xdp_ring_num = prog ? ALIGN(priv->rx_ring_num, MLX4_EN_NUM_UP) : 0;
/* No need to reconfigure buffers when simply swapping the
* program for a new one.
*/
if (priv->xdp_ring_num == xdp_ring_num) {
if (prog) {
prog = bpf_prog_add(prog, priv->rx_ring_num - 1);
if (IS_ERR(prog))
return PTR_ERR(prog);
}
for (i = 0; i < priv->rx_ring_num; i++) {
/* This xchg is paired with READ_ONCE in the fastpath */
old_prog = xchg(&priv->rx_ring[i]->xdp_prog, prog);
if (old_prog)
bpf_prog_put(old_prog);
}
return 0;
}
if (priv->num_frags > 1) {
en_err(priv, "Cannot set XDP if MTU requires multiple frags\n");
return -EOPNOTSUPP;
}
if (priv->tx_ring_num < xdp_ring_num + MLX4_EN_NUM_UP) {
en_err(priv,
"Minimum %d tx channels required to run XDP\n",
(xdp_ring_num + MLX4_EN_NUM_UP) / MLX4_EN_NUM_UP);
return -EINVAL;
}
if (prog) {
prog = bpf_prog_add(prog, priv->rx_ring_num - 1);
if (IS_ERR(prog))
return PTR_ERR(prog);
}
mutex_lock(&mdev->state_lock);
if (priv->port_up) {
port_up = 1;
mlx4_en_stop_port(dev, 1);
}
priv->xdp_ring_num = xdp_ring_num;
netif_set_real_num_tx_queues(dev, priv->tx_ring_num -
priv->xdp_ring_num);
for (i = 0; i < priv->rx_ring_num; i++) {
old_prog = xchg(&priv->rx_ring[i]->xdp_prog, prog);
if (old_prog)
bpf_prog_put(old_prog);
}
if (port_up) {
err = mlx4_en_start_port(dev);
if (err) {
en_err(priv, "Failed starting port %d for XDP change\n",
priv->port);
queue_work(mdev->workqueue, &priv->watchdog_task);
}
}
mutex_unlock(&mdev->state_lock);
return 0;
}
static bool mlx4_xdp_attached(struct net_device *dev)
{
struct mlx4_en_priv *priv = netdev_priv(dev);
return !!priv->xdp_ring_num;
}
static int mlx4_xdp(struct net_device *dev, struct netdev_xdp *xdp)
{
switch (xdp->command) {
case XDP_SETUP_PROG:
return mlx4_xdp_set(dev, xdp->prog);
case XDP_QUERY_PROG:
xdp->prog_attached = mlx4_xdp_attached(dev);
return 0;
default:
return -EINVAL;
}
}
static const struct net_device_ops mlx4_netdev_ops = {
.ndo_open = mlx4_en_open,
.ndo_stop = mlx4_en_close,
.ndo_start_xmit = mlx4_en_xmit,
.ndo_select_queue = mlx4_en_select_queue,
.ndo_get_stats64 = mlx4_en_get_stats64,
.ndo_set_rx_mode = mlx4_en_set_rx_mode,
.ndo_set_mac_address = mlx4_en_set_mac,
.ndo_validate_addr = eth_validate_addr,
.ndo_change_mtu = mlx4_en_change_mtu,
.ndo_do_ioctl = mlx4_en_ioctl,
.ndo_tx_timeout = mlx4_en_tx_timeout,
.ndo_vlan_rx_add_vid = mlx4_en_vlan_rx_add_vid,
.ndo_vlan_rx_kill_vid = mlx4_en_vlan_rx_kill_vid,
#ifdef CONFIG_NET_POLL_CONTROLLER
.ndo_poll_controller = mlx4_en_netpoll,
#endif
.ndo_set_features = mlx4_en_set_features,
.ndo_fix_features = mlx4_en_fix_features,
.ndo_setup_tc = __mlx4_en_setup_tc,
#ifdef CONFIG_RFS_ACCEL
.ndo_rx_flow_steer = mlx4_en_filter_rfs,
#endif
.ndo_get_phys_port_id = mlx4_en_get_phys_port_id,
.ndo_udp_tunnel_add = mlx4_en_add_vxlan_port,
.ndo_udp_tunnel_del = mlx4_en_del_vxlan_port,
.ndo_features_check = mlx4_en_features_check,
.ndo_set_tx_maxrate = mlx4_en_set_tx_maxrate,
.ndo_xdp = mlx4_xdp,
};
static const struct net_device_ops mlx4_netdev_ops_master = {
.ndo_open = mlx4_en_open,
.ndo_stop = mlx4_en_close,
.ndo_start_xmit = mlx4_en_xmit,
.ndo_select_queue = mlx4_en_select_queue,
.ndo_get_stats64 = mlx4_en_get_stats64,
.ndo_set_rx_mode = mlx4_en_set_rx_mode,
.ndo_set_mac_address = mlx4_en_set_mac,
.ndo_validate_addr = eth_validate_addr,
.ndo_change_mtu = mlx4_en_change_mtu,
.ndo_tx_timeout = mlx4_en_tx_timeout,
.ndo_vlan_rx_add_vid = mlx4_en_vlan_rx_add_vid,
.ndo_vlan_rx_kill_vid = mlx4_en_vlan_rx_kill_vid,
.ndo_set_vf_mac = mlx4_en_set_vf_mac,
.ndo_set_vf_vlan = mlx4_en_set_vf_vlan,
.ndo_set_vf_rate = mlx4_en_set_vf_rate,
.ndo_set_vf_spoofchk = mlx4_en_set_vf_spoofchk,
.ndo_set_vf_link_state = mlx4_en_set_vf_link_state,
.ndo_get_vf_stats = mlx4_en_get_vf_stats,
.ndo_get_vf_config = mlx4_en_get_vf_config,
#ifdef CONFIG_NET_POLL_CONTROLLER
.ndo_poll_controller = mlx4_en_netpoll,
#endif
.ndo_set_features = mlx4_en_set_features,
.ndo_fix_features = mlx4_en_fix_features,
.ndo_setup_tc = __mlx4_en_setup_tc,
#ifdef CONFIG_RFS_ACCEL
.ndo_rx_flow_steer = mlx4_en_filter_rfs,
#endif
.ndo_get_phys_port_id = mlx4_en_get_phys_port_id,
.ndo_udp_tunnel_add = mlx4_en_add_vxlan_port,
.ndo_udp_tunnel_del = mlx4_en_del_vxlan_port,
.ndo_features_check = mlx4_en_features_check,
.ndo_set_tx_maxrate = mlx4_en_set_tx_maxrate,
.ndo_xdp = mlx4_xdp,
};
struct mlx4_en_bond {
struct work_struct work;
struct mlx4_en_priv *priv;
int is_bonded;
struct mlx4_port_map port_map;
};
static void mlx4_en_bond_work(struct work_struct *work)
{
struct mlx4_en_bond *bond = container_of(work,
struct mlx4_en_bond,
work);
int err = 0;
struct mlx4_dev *dev = bond->priv->mdev->dev;
if (bond->is_bonded) {
if (!mlx4_is_bonded(dev)) {
err = mlx4_bond(dev);
if (err)
en_err(bond->priv, "Fail to bond device\n");
}
if (!err) {
err = mlx4_port_map_set(dev, &bond->port_map);
if (err)
en_err(bond->priv, "Fail to set port map [%d][%d]: %d\n",
bond->port_map.port1,
bond->port_map.port2,
err);
}
} else if (mlx4_is_bonded(dev)) {
err = mlx4_unbond(dev);
if (err)
en_err(bond->priv, "Fail to unbond device\n");
}
dev_put(bond->priv->dev);
kfree(bond);
}
static int mlx4_en_queue_bond_work(struct mlx4_en_priv *priv, int is_bonded,
u8 v2p_p1, u8 v2p_p2)
{
struct mlx4_en_bond *bond = NULL;
bond = kzalloc(sizeof(*bond), GFP_ATOMIC);
if (!bond)
return -ENOMEM;
INIT_WORK(&bond->work, mlx4_en_bond_work);
bond->priv = priv;
bond->is_bonded = is_bonded;
bond->port_map.port1 = v2p_p1;
bond->port_map.port2 = v2p_p2;
dev_hold(priv->dev);
queue_work(priv->mdev->workqueue, &bond->work);
return 0;
}
int mlx4_en_netdev_event(struct notifier_block *this,
unsigned long event, void *ptr)
{
struct net_device *ndev = netdev_notifier_info_to_dev(ptr);
u8 port = 0;
struct mlx4_en_dev *mdev;
struct mlx4_dev *dev;
int i, num_eth_ports = 0;
bool do_bond = true;
struct mlx4_en_priv *priv;
u8 v2p_port1 = 0;
u8 v2p_port2 = 0;
if (!net_eq(dev_net(ndev), &init_net))
return NOTIFY_DONE;
mdev = container_of(this, struct mlx4_en_dev, nb);
dev = mdev->dev;
/* Go into this mode only when two network devices set on two ports
* of the same mlx4 device are slaves of the same bonding master
*/
mlx4_foreach_port(i, dev, MLX4_PORT_TYPE_ETH) {
++num_eth_ports;
if (!port && (mdev->pndev[i] == ndev))
port = i;
mdev->upper[i] = mdev->pndev[i] ?
netdev_master_upper_dev_get(mdev->pndev[i]) : NULL;
/* condition not met: network device is a slave */
if (!mdev->upper[i])
do_bond = false;
if (num_eth_ports < 2)
continue;
/* condition not met: same master */
if (mdev->upper[i] != mdev->upper[i-1])
do_bond = false;
}
/* condition not met: 2 salves */
do_bond = (num_eth_ports == 2) ? do_bond : false;
/* handle only events that come with enough info */
if ((do_bond && (event != NETDEV_BONDING_INFO)) || !port)
return NOTIFY_DONE;
priv = netdev_priv(ndev);
if (do_bond) {
struct netdev_notifier_bonding_info *notifier_info = ptr;
struct netdev_bonding_info *bonding_info =
&notifier_info->bonding_info;
/* required mode 1, 2 or 4 */
if ((bonding_info->master.bond_mode != BOND_MODE_ACTIVEBACKUP) &&
(bonding_info->master.bond_mode != BOND_MODE_XOR) &&
(bonding_info->master.bond_mode != BOND_MODE_8023AD))
do_bond = false;
/* require exactly 2 slaves */
if (bonding_info->master.num_slaves != 2)
do_bond = false;
/* calc v2p */
if (do_bond) {
if (bonding_info->master.bond_mode ==
BOND_MODE_ACTIVEBACKUP) {
/* in active-backup mode virtual ports are
* mapped to the physical port of the active
* slave */
if (bonding_info->slave.state ==
BOND_STATE_BACKUP) {
if (port == 1) {
v2p_port1 = 2;
v2p_port2 = 2;
} else {
v2p_port1 = 1;
v2p_port2 = 1;
}
} else { /* BOND_STATE_ACTIVE */
if (port == 1) {
v2p_port1 = 1;
v2p_port2 = 1;
} else {
v2p_port1 = 2;
v2p_port2 = 2;
}
}
} else { /* Active-Active */
/* in active-active mode a virtual port is
* mapped to the native physical port if and only
* if the physical port is up */
__s8 link = bonding_info->slave.link;
if (port == 1)
v2p_port2 = 2;
else
v2p_port1 = 1;
if ((link == BOND_LINK_UP) ||
(link == BOND_LINK_FAIL)) {
if (port == 1)
v2p_port1 = 1;
else
v2p_port2 = 2;
} else { /* BOND_LINK_DOWN || BOND_LINK_BACK */
if (port == 1)
v2p_port1 = 2;
else
v2p_port2 = 1;
}
}
}
}
mlx4_en_queue_bond_work(priv, do_bond,
v2p_port1, v2p_port2);
return NOTIFY_DONE;
}
void mlx4_en_update_pfc_stats_bitmap(struct mlx4_dev *dev,
struct mlx4_en_stats_bitmap *stats_bitmap,
u8 rx_ppp, u8 rx_pause,
u8 tx_ppp, u8 tx_pause)
{
int last_i = NUM_MAIN_STATS + NUM_PORT_STATS + NUM_PF_STATS;
if (!mlx4_is_slave(dev) &&
(dev->caps.flags2 & MLX4_DEV_CAP_FLAG2_FLOWSTATS_EN)) {
mutex_lock(&stats_bitmap->mutex);
bitmap_clear(stats_bitmap->bitmap, last_i, NUM_FLOW_STATS);
if (rx_ppp)
bitmap_set(stats_bitmap->bitmap, last_i,
NUM_FLOW_PRIORITY_STATS_RX);
last_i += NUM_FLOW_PRIORITY_STATS_RX;
if (rx_pause && !(rx_ppp))
bitmap_set(stats_bitmap->bitmap, last_i,
NUM_FLOW_STATS_RX);
last_i += NUM_FLOW_STATS_RX;
if (tx_ppp)
bitmap_set(stats_bitmap->bitmap, last_i,
NUM_FLOW_PRIORITY_STATS_TX);
last_i += NUM_FLOW_PRIORITY_STATS_TX;
if (tx_pause && !(tx_ppp))
bitmap_set(stats_bitmap->bitmap, last_i,
NUM_FLOW_STATS_TX);
last_i += NUM_FLOW_STATS_TX;
mutex_unlock(&stats_bitmap->mutex);
}
}
void mlx4_en_set_stats_bitmap(struct mlx4_dev *dev,
struct mlx4_en_stats_bitmap *stats_bitmap,
u8 rx_ppp, u8 rx_pause,
u8 tx_ppp, u8 tx_pause)
{
int last_i = 0;
mutex_init(&stats_bitmap->mutex);
bitmap_zero(stats_bitmap->bitmap, NUM_ALL_STATS);
if (mlx4_is_slave(dev)) {
bitmap_set(stats_bitmap->bitmap, last_i +
MLX4_FIND_NETDEV_STAT(rx_packets), 1);
bitmap_set(stats_bitmap->bitmap, last_i +
MLX4_FIND_NETDEV_STAT(tx_packets), 1);
bitmap_set(stats_bitmap->bitmap, last_i +
MLX4_FIND_NETDEV_STAT(rx_bytes), 1);
bitmap_set(stats_bitmap->bitmap, last_i +
MLX4_FIND_NETDEV_STAT(tx_bytes), 1);
bitmap_set(stats_bitmap->bitmap, last_i +
MLX4_FIND_NETDEV_STAT(rx_dropped), 1);
bitmap_set(stats_bitmap->bitmap, last_i +
MLX4_FIND_NETDEV_STAT(tx_dropped), 1);
} else {
bitmap_set(stats_bitmap->bitmap, last_i, NUM_MAIN_STATS);
}
last_i += NUM_MAIN_STATS;
bitmap_set(stats_bitmap->bitmap, last_i, NUM_PORT_STATS);
last_i += NUM_PORT_STATS;
if (mlx4_is_master(dev))
bitmap_set(stats_bitmap->bitmap, last_i,
NUM_PF_STATS);
last_i += NUM_PF_STATS;
mlx4_en_update_pfc_stats_bitmap(dev, stats_bitmap,
rx_ppp, rx_pause,
tx_ppp, tx_pause);
last_i += NUM_FLOW_STATS;
if (!mlx4_is_slave(dev))
bitmap_set(stats_bitmap->bitmap, last_i, NUM_PKT_STATS);
}
int mlx4_en_init_netdev(struct mlx4_en_dev *mdev, int port,
struct mlx4_en_port_profile *prof)
{
struct net_device *dev;
struct mlx4_en_priv *priv;
int i;
int err;
#ifdef CONFIG_MLX4_EN_DCB
struct tc_configuration *tc;
#endif
dev = alloc_etherdev_mqs(sizeof(struct mlx4_en_priv),
MAX_TX_RINGS, MAX_RX_RINGS);
if (dev == NULL)
return -ENOMEM;
netif_set_real_num_tx_queues(dev, prof->tx_ring_num);
netif_set_real_num_rx_queues(dev, prof->rx_ring_num);
SET_NETDEV_DEV(dev, &mdev->dev->persist->pdev->dev);
dev->dev_port = port - 1;
/*
* Initialize driver private data
*/
priv = netdev_priv(dev);
memset(priv, 0, sizeof(struct mlx4_en_priv));
priv->counter_index = MLX4_SINK_COUNTER_INDEX(mdev->dev);
spin_lock_init(&priv->stats_lock);
INIT_WORK(&priv->rx_mode_task, mlx4_en_do_set_rx_mode);
INIT_WORK(&priv->watchdog_task, mlx4_en_restart);
INIT_WORK(&priv->linkstate_task, mlx4_en_linkstate);
INIT_DELAYED_WORK(&priv->stats_task, mlx4_en_do_get_stats);
INIT_DELAYED_WORK(&priv->service_task, mlx4_en_service_task);
INIT_WORK(&priv->vxlan_add_task, mlx4_en_add_vxlan_offloads);
INIT_WORK(&priv->vxlan_del_task, mlx4_en_del_vxlan_offloads);
#ifdef CONFIG_RFS_ACCEL
INIT_LIST_HEAD(&priv->filters);
spin_lock_init(&priv->filters_lock);
#endif
priv->dev = dev;
priv->mdev = mdev;
priv->ddev = &mdev->pdev->dev;
priv->prof = prof;
priv->port = port;
priv->port_up = false;
priv->flags = prof->flags;
priv->pflags = MLX4_EN_PRIV_FLAGS_BLUEFLAME;
priv->ctrl_flags = cpu_to_be32(MLX4_WQE_CTRL_CQ_UPDATE |
MLX4_WQE_CTRL_SOLICITED);
priv->num_tx_rings_p_up = mdev->profile.num_tx_rings_p_up;
priv->tx_ring_num = prof->tx_ring_num;
priv->tx_work_limit = MLX4_EN_DEFAULT_TX_WORK;
netdev_rss_key_fill(priv->rss_key, sizeof(priv->rss_key));
priv->tx_ring = kzalloc(sizeof(struct mlx4_en_tx_ring *) * MAX_TX_RINGS,
GFP_KERNEL);
if (!priv->tx_ring) {
err = -ENOMEM;
goto out;
}
priv->tx_cq = kzalloc(sizeof(struct mlx4_en_cq *) * MAX_TX_RINGS,
GFP_KERNEL);
if (!priv->tx_cq) {
err = -ENOMEM;
goto out;
}
priv->rx_ring_num = prof->rx_ring_num;
priv->cqe_factor = (mdev->dev->caps.cqe_size == 64) ? 1 : 0;
priv->cqe_size = mdev->dev->caps.cqe_size;
priv->mac_index = -1;
priv->msg_enable = MLX4_EN_MSG_LEVEL;
#ifdef CONFIG_MLX4_EN_DCB
if (!mlx4_is_slave(priv->mdev->dev)) {
priv->cee_params.dcbx_cap = DCB_CAP_DCBX_VER_CEE |
DCB_CAP_DCBX_HOST |
DCB_CAP_DCBX_VER_IEEE;
priv->flags |= MLX4_EN_DCB_ENABLED;
priv->cee_params.dcb_cfg.pfc_state = false;
for (i = 0; i < MLX4_EN_NUM_UP; i++) {
tc = &priv->cee_params.dcb_cfg.tc_config[i];
tc->dcb_pfc = pfc_disabled;
}
if (mdev->dev->caps.flags2 & MLX4_DEV_CAP_FLAG2_ETS_CFG) {
dev->dcbnl_ops = &mlx4_en_dcbnl_ops;
} else {
en_info(priv, "enabling only PFC DCB ops\n");
dev->dcbnl_ops = &mlx4_en_dcbnl_pfc_ops;
}
}
#endif
for (i = 0; i < MLX4_EN_MAC_HASH_SIZE; ++i)
INIT_HLIST_HEAD(&priv->mac_hash[i]);
/* Query for default mac and max mtu */
priv->max_mtu = mdev->dev->caps.eth_mtu_cap[priv->port];
if (mdev->dev->caps.rx_checksum_flags_port[priv->port] &
MLX4_RX_CSUM_MODE_VAL_NON_TCP_UDP)
priv->flags |= MLX4_EN_FLAG_RX_CSUM_NON_TCP_UDP;
/* Set default MAC */
dev->addr_len = ETH_ALEN;
mlx4_en_u64_to_mac(dev->dev_addr, mdev->dev->caps.def_mac[priv->port]);
if (!is_valid_ether_addr(dev->dev_addr)) {
en_err(priv, "Port: %d, invalid mac burned: %pM, quiting\n",
priv->port, dev->dev_addr);
err = -EINVAL;
goto out;
} else if (mlx4_is_slave(priv->mdev->dev) &&
(priv->mdev->dev->port_random_macs & 1 << priv->port)) {
/* Random MAC was assigned in mlx4_slave_cap
* in mlx4_core module
*/
dev->addr_assign_type |= NET_ADDR_RANDOM;
en_warn(priv, "Assigned random MAC address %pM\n", dev->dev_addr);
}
memcpy(priv->current_mac, dev->dev_addr, sizeof(priv->current_mac));
priv->stride = roundup_pow_of_two(sizeof(struct mlx4_en_rx_desc) +
DS_SIZE * MLX4_EN_MAX_RX_FRAGS);
err = mlx4_en_alloc_resources(priv);
if (err)
goto out;
/* Initialize time stamping config */
priv->hwtstamp_config.flags = 0;
priv->hwtstamp_config.tx_type = HWTSTAMP_TX_OFF;
priv->hwtstamp_config.rx_filter = HWTSTAMP_FILTER_NONE;
/* Allocate page for receive rings */
err = mlx4_alloc_hwq_res(mdev->dev, &priv->res,
MLX4_EN_PAGE_SIZE);
if (err) {
en_err(priv, "Failed to allocate page for rx qps\n");
goto out;
}
priv->allocated = 1;
/*
* Initialize netdev entry points
*/
if (mlx4_is_master(priv->mdev->dev))
dev->netdev_ops = &mlx4_netdev_ops_master;
else
dev->netdev_ops = &mlx4_netdev_ops;
dev->watchdog_timeo = MLX4_EN_WATCHDOG_TIMEOUT;
netif_set_real_num_tx_queues(dev, priv->tx_ring_num);
netif_set_real_num_rx_queues(dev, priv->rx_ring_num);
dev->ethtool_ops = &mlx4_en_ethtool_ops;
/*
* Set driver features
*/
dev->hw_features = NETIF_F_SG | NETIF_F_IP_CSUM | NETIF_F_IPV6_CSUM;
if (mdev->LSO_support)
dev->hw_features |= NETIF_F_TSO | NETIF_F_TSO6;
dev->vlan_features = dev->hw_features;
dev->hw_features |= NETIF_F_RXCSUM | NETIF_F_RXHASH;
dev->features = dev->hw_features | NETIF_F_HIGHDMA |
NETIF_F_HW_VLAN_CTAG_TX | NETIF_F_HW_VLAN_CTAG_RX |
NETIF_F_HW_VLAN_CTAG_FILTER;
dev->hw_features |= NETIF_F_LOOPBACK |
NETIF_F_HW_VLAN_CTAG_TX | NETIF_F_HW_VLAN_CTAG_RX;
if (!(mdev->dev->caps.flags2 & MLX4_DEV_CAP_FLAG2_SKIP_OUTER_VLAN)) {
dev->features |= NETIF_F_HW_VLAN_STAG_RX |
NETIF_F_HW_VLAN_STAG_FILTER;
dev->hw_features |= NETIF_F_HW_VLAN_STAG_RX;
}
if (mlx4_is_slave(mdev->dev)) {
int phv;
err = get_phv_bit(mdev->dev, port, &phv);
if (!err && phv) {
dev->hw_features |= NETIF_F_HW_VLAN_STAG_TX;
priv->pflags |= MLX4_EN_PRIV_FLAGS_PHV;
}
} else {
if (mdev->dev->caps.flags2 & MLX4_DEV_CAP_FLAG2_PHV_EN &&
!(mdev->dev->caps.flags2 &
MLX4_DEV_CAP_FLAG2_SKIP_OUTER_VLAN))
dev->hw_features |= NETIF_F_HW_VLAN_STAG_TX;
}
if (mdev->dev->caps.flags & MLX4_DEV_CAP_FLAG_FCS_KEEP)
dev->hw_features |= NETIF_F_RXFCS;
if (mdev->dev->caps.flags2 & MLX4_DEV_CAP_FLAG2_IGNORE_FCS)
dev->hw_features |= NETIF_F_RXALL;
if (mdev->dev->caps.steering_mode ==
MLX4_STEERING_MODE_DEVICE_MANAGED &&
mdev->dev->caps.dmfs_high_steer_mode != MLX4_STEERING_DMFS_A0_STATIC)
dev->hw_features |= NETIF_F_NTUPLE;
if (mdev->dev->caps.steering_mode != MLX4_STEERING_MODE_A0)
dev->priv_flags |= IFF_UNICAST_FLT;
/* Setting a default hash function value */
if (mdev->dev->caps.flags2 & MLX4_DEV_CAP_FLAG2_RSS_TOP) {
priv->rss_hash_fn = ETH_RSS_HASH_TOP;
} else if (mdev->dev->caps.flags2 & MLX4_DEV_CAP_FLAG2_RSS_XOR) {
priv->rss_hash_fn = ETH_RSS_HASH_XOR;
} else {
en_warn(priv,
"No RSS hash capabilities exposed, using Toeplitz\n");
priv->rss_hash_fn = ETH_RSS_HASH_TOP;
}
if (mdev->dev->caps.tunnel_offload_mode == MLX4_TUNNEL_OFFLOAD_MODE_VXLAN) {
dev->hw_features |= NETIF_F_GSO_UDP_TUNNEL |
NETIF_F_GSO_UDP_TUNNEL_CSUM |
NETIF_F_GSO_PARTIAL;
dev->features |= NETIF_F_GSO_UDP_TUNNEL |
NETIF_F_GSO_UDP_TUNNEL_CSUM |
NETIF_F_GSO_PARTIAL;
dev->gso_partial_features = NETIF_F_GSO_UDP_TUNNEL_CSUM;
}
mdev->pndev[port] = dev;
mdev->upper[port] = NULL;
netif_carrier_off(dev);
mlx4_en_set_default_moderation(priv);
en_warn(priv, "Using %d TX rings\n", prof->tx_ring_num);
en_warn(priv, "Using %d RX rings\n", prof->rx_ring_num);
mlx4_en_update_loopback_state(priv->dev, priv->dev->features);
/* Configure port */
mlx4_en_calc_rx_buf(dev);
err = mlx4_SET_PORT_general(mdev->dev, priv->port,
priv->rx_skb_size + ETH_FCS_LEN,
prof->tx_pause, prof->tx_ppp,
prof->rx_pause, prof->rx_ppp);
if (err) {
en_err(priv, "Failed setting port general configurations for port %d, with error %d\n",
priv->port, err);
goto out;
}
if (mdev->dev->caps.tunnel_offload_mode == MLX4_TUNNEL_OFFLOAD_MODE_VXLAN) {
err = mlx4_SET_PORT_VXLAN(mdev->dev, priv->port, VXLAN_STEER_BY_OUTER_MAC, 1);
if (err) {
en_err(priv, "Failed setting port L2 tunnel configuration, err %d\n",
err);
goto out;
}
}
/* Init port */
en_warn(priv, "Initializing port\n");
err = mlx4_INIT_PORT(mdev->dev, priv->port);
if (err) {
en_err(priv, "Failed Initializing port\n");
goto out;
}
queue_delayed_work(mdev->workqueue, &priv->stats_task, STATS_DELAY);
/* Initialize time stamp mechanism */
if (mdev->dev->caps.flags2 & MLX4_DEV_CAP_FLAG2_TS)
mlx4_en_init_timestamp(mdev);
queue_delayed_work(mdev->workqueue, &priv->service_task,
SERVICE_TASK_DELAY);
mlx4_en_set_stats_bitmap(mdev->dev, &priv->stats_bitmap,
mdev->profile.prof[priv->port].rx_ppp,
mdev->profile.prof[priv->port].rx_pause,
mdev->profile.prof[priv->port].tx_ppp,
mdev->profile.prof[priv->port].tx_pause);
err = register_netdev(dev);
if (err) {
en_err(priv, "Netdev registration failed for port %d\n", port);
goto out;
}
priv->registered = 1;
devlink_port_type_eth_set(mlx4_get_devlink_port(mdev->dev, priv->port),
dev);
return 0;
out:
mlx4_en_destroy_netdev(dev);
return err;
}
int mlx4_en_reset_config(struct net_device *dev,
struct hwtstamp_config ts_config,
netdev_features_t features)
{
struct mlx4_en_priv *priv = netdev_priv(dev);
struct mlx4_en_dev *mdev = priv->mdev;
struct mlx4_en_port_profile new_prof;
struct mlx4_en_priv *tmp;
int port_up = 0;
int err = 0;
if (priv->hwtstamp_config.tx_type == ts_config.tx_type &&
priv->hwtstamp_config.rx_filter == ts_config.rx_filter &&
!DEV_FEATURE_CHANGED(dev, features, NETIF_F_HW_VLAN_CTAG_RX) &&
!DEV_FEATURE_CHANGED(dev, features, NETIF_F_RXFCS))
return 0; /* Nothing to change */
if (DEV_FEATURE_CHANGED(dev, features, NETIF_F_HW_VLAN_CTAG_RX) &&
(features & NETIF_F_HW_VLAN_CTAG_RX) &&
(priv->hwtstamp_config.rx_filter != HWTSTAMP_FILTER_NONE)) {
en_warn(priv, "Can't turn ON rx vlan offload while time-stamping rx filter is ON\n");
return -EINVAL;
}
tmp = kzalloc(sizeof(*tmp), GFP_KERNEL);
if (!tmp)
return -ENOMEM;
mutex_lock(&mdev->state_lock);
memcpy(&new_prof, priv->prof, sizeof(struct mlx4_en_port_profile));
memcpy(&new_prof.hwtstamp_config, &ts_config, sizeof(ts_config));
err = mlx4_en_try_alloc_resources(priv, tmp, &new_prof);
if (err)
goto out;
if (priv->port_up) {
port_up = 1;
mlx4_en_stop_port(dev, 1);
}
en_warn(priv, "Changing device configuration rx filter(%x) rx vlan(%x)\n",
ts_config.rx_filter,
!!(features & NETIF_F_HW_VLAN_CTAG_RX));
mlx4_en_safe_replace_resources(priv, tmp);
if (DEV_FEATURE_CHANGED(dev, features, NETIF_F_HW_VLAN_CTAG_RX)) {
if (features & NETIF_F_HW_VLAN_CTAG_RX)
dev->features |= NETIF_F_HW_VLAN_CTAG_RX;
else
dev->features &= ~NETIF_F_HW_VLAN_CTAG_RX;
} else if (ts_config.rx_filter == HWTSTAMP_FILTER_NONE) {
/* RX time-stamping is OFF, update the RX vlan offload
* to the latest wanted state
*/
if (dev->wanted_features & NETIF_F_HW_VLAN_CTAG_RX)
dev->features |= NETIF_F_HW_VLAN_CTAG_RX;
else
dev->features &= ~NETIF_F_HW_VLAN_CTAG_RX;
}
if (DEV_FEATURE_CHANGED(dev, features, NETIF_F_RXFCS)) {
if (features & NETIF_F_RXFCS)
dev->features |= NETIF_F_RXFCS;
else
dev->features &= ~NETIF_F_RXFCS;
}
/* RX vlan offload and RX time-stamping can't co-exist !
* Regardless of the caller's choice,
* Turn Off RX vlan offload in case of time-stamping is ON
*/
if (ts_config.rx_filter != HWTSTAMP_FILTER_NONE) {
if (dev->features & NETIF_F_HW_VLAN_CTAG_RX)
en_warn(priv, "Turning off RX vlan offload since RX time-stamping is ON\n");
dev->features &= ~NETIF_F_HW_VLAN_CTAG_RX;
}
if (port_up) {
err = mlx4_en_start_port(dev);
if (err)
en_err(priv, "Failed starting port\n");
}
out:
mutex_unlock(&mdev->state_lock);
kfree(tmp);
if (!err)
netdev_features_change(dev);
return err;
}