401 lines
12 KiB
C
401 lines
12 KiB
C
|
/*
|
||
|
|
* Copyright(c) 2017 Intel Corporation.
|
||
|
|
*
|
||
|
|
* This file is provided under a dual BSD/GPLv2 license. When using or
|
||
|
|
* redistributing this file, you may do so under either license.
|
||
|
|
*
|
||
|
|
* GPL LICENSE SUMMARY
|
||
|
|
*
|
||
|
|
* This program is free software; you can redistribute it and/or modify
|
||
|
|
* it under the terms of version 2 of the GNU General Public License as
|
||
|
|
* published by the Free Software Foundation.
|
||
|
|
*
|
||
|
|
* This program is distributed in the hope that it will be useful, but
|
||
|
|
* WITHOUT ANY WARRANTY; without even the implied warranty of
|
||
|
|
* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
|
||
|
|
* General Public License for more details.
|
||
|
|
*
|
||
|
|
* BSD LICENSE
|
||
|
|
*
|
||
|
|
* 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.
|
||
|
|
* - Neither the name of Intel Corporation nor the names of its
|
||
|
|
* contributors may be used to endorse or promote products derived
|
||
|
|
* from this software without specific prior written permission.
|
||
|
|
*
|
||
|
|
* THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS
|
||
|
|
* "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT
|
||
|
|
* LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR
|
||
|
|
* A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT
|
||
|
|
* OWNER OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL,
|
||
|
|
* SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT
|
||
|
|
* LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE,
|
||
|
|
* DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY
|
||
|
|
* THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
|
||
|
|
* (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE
|
||
|
|
* OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
|
||
|
|
*
|
||
|
|
*/
|
||
|
|
|
||
|
|
/*
|
||
|
|
* This file contains OPA Virtual Network Interface Controller (VNIC) driver
|
||
|
|
* netdev functionality.
|
||
|
|
*/
|
||
|
|
|
||
|
|
#include <linux/if_vlan.h>
|
||
|
|
#include <linux/crc32.h>
|
||
|
|
|
||
|
|
#include "opa_vnic_internal.h"
|
||
|
|
|
||
|
|
#define OPA_TX_TIMEOUT_MS 1000
|
||
|
|
|
||
|
|
#define OPA_VNIC_SKB_HEADROOM \
|
||
|
|
ALIGN((OPA_VNIC_HDR_LEN + OPA_VNIC_SKB_MDATA_LEN), 8)
|
||
|
|
|
||
|
|
/* This function is overloaded for opa_vnic specific implementation */
|
||
|
|
static void opa_vnic_get_stats64(struct net_device *netdev,
|
||
|
|
struct rtnl_link_stats64 *stats)
|
||
|
|
{
|
||
|
|
struct opa_vnic_adapter *adapter = opa_vnic_priv(netdev);
|
||
|
|
struct opa_vnic_stats vstats;
|
||
|
|
|
||
|
|
memset(&vstats, 0, sizeof(vstats));
|
||
|
|
spin_lock(&adapter->stats_lock);
|
||
|
|
adapter->rn_ops->ndo_get_stats64(netdev, &vstats.netstats);
|
||
|
|
spin_unlock(&adapter->stats_lock);
|
||
|
|
memcpy(stats, &vstats.netstats, sizeof(*stats));
|
||
|
|
}
|
||
|
|
|
||
|
|
/* opa_netdev_start_xmit - transmit function */
|
||
|
|
static netdev_tx_t opa_netdev_start_xmit(struct sk_buff *skb,
|
||
|
|
struct net_device *netdev)
|
||
|
|
{
|
||
|
|
struct opa_vnic_adapter *adapter = opa_vnic_priv(netdev);
|
||
|
|
|
||
|
|
v_dbg("xmit: queue %d skb len %d\n", skb->queue_mapping, skb->len);
|
||
|
|
/* pad to ensure mininum ethernet packet length */
|
||
|
|
if (unlikely(skb->len < ETH_ZLEN)) {
|
||
|
|
if (skb_padto(skb, ETH_ZLEN))
|
||
|
|
return NETDEV_TX_OK;
|
||
|
|
|
||
|
|
skb_put(skb, ETH_ZLEN - skb->len);
|
||
|
|
}
|
||
|
|
|
||
|
|
opa_vnic_encap_skb(adapter, skb);
|
||
|
|
return adapter->rn_ops->ndo_start_xmit(skb, netdev);
|
||
|
|
}
|
||
|
|
|
||
|
|
static u16 opa_vnic_select_queue(struct net_device *netdev, struct sk_buff *skb,
|
||
|
|
struct net_device *sb_dev)
|
||
|
|
{
|
||
|
|
struct opa_vnic_adapter *adapter = opa_vnic_priv(netdev);
|
||
|
|
struct opa_vnic_skb_mdata *mdata;
|
||
|
|
int rc;
|
||
|
|
|
||
|
|
/* pass entropy and vl as metadata in skb */
|
||
|
|
mdata = skb_push(skb, sizeof(*mdata));
|
||
|
|
mdata->entropy = opa_vnic_calc_entropy(skb);
|
||
|
|
mdata->vl = opa_vnic_get_vl(adapter, skb);
|
||
|
|
rc = adapter->rn_ops->ndo_select_queue(netdev, skb, sb_dev);
|
||
|
|
skb_pull(skb, sizeof(*mdata));
|
||
|
|
return rc;
|
||
|
|
}
|
||
|
|
|
||
|
|
static void opa_vnic_update_state(struct opa_vnic_adapter *adapter, bool up)
|
||
|
|
{
|
||
|
|
struct __opa_veswport_info *info = &adapter->info;
|
||
|
|
|
||
|
|
mutex_lock(&adapter->lock);
|
||
|
|
/* Operational state can only be DROP_ALL or FORWARDING */
|
||
|
|
if ((info->vport.config_state == OPA_VNIC_STATE_FORWARDING) && up) {
|
||
|
|
info->vport.oper_state = OPA_VNIC_STATE_FORWARDING;
|
||
|
|
info->vport.eth_link_status = OPA_VNIC_ETH_LINK_UP;
|
||
|
|
} else {
|
||
|
|
info->vport.oper_state = OPA_VNIC_STATE_DROP_ALL;
|
||
|
|
info->vport.eth_link_status = OPA_VNIC_ETH_LINK_DOWN;
|
||
|
|
}
|
||
|
|
|
||
|
|
if (info->vport.config_state == OPA_VNIC_STATE_FORWARDING)
|
||
|
|
netif_dormant_off(adapter->netdev);
|
||
|
|
else
|
||
|
|
netif_dormant_on(adapter->netdev);
|
||
|
|
mutex_unlock(&adapter->lock);
|
||
|
|
}
|
||
|
|
|
||
|
|
/* opa_vnic_process_vema_config - process vema configuration updates */
|
||
|
|
void opa_vnic_process_vema_config(struct opa_vnic_adapter *adapter)
|
||
|
|
{
|
||
|
|
struct __opa_veswport_info *info = &adapter->info;
|
||
|
|
struct rdma_netdev *rn = netdev_priv(adapter->netdev);
|
||
|
|
u8 port_num[OPA_VESW_MAX_NUM_DEF_PORT] = { 0 };
|
||
|
|
struct net_device *netdev = adapter->netdev;
|
||
|
|
u8 i, port_count = 0;
|
||
|
|
u16 port_mask;
|
||
|
|
|
||
|
|
/* If the base_mac_addr is changed, update the interface mac address */
|
||
|
|
if (memcmp(info->vport.base_mac_addr, adapter->vema_mac_addr,
|
||
|
|
ARRAY_SIZE(info->vport.base_mac_addr))) {
|
||
|
|
struct sockaddr saddr;
|
||
|
|
|
||
|
|
memcpy(saddr.sa_data, info->vport.base_mac_addr,
|
||
|
|
ARRAY_SIZE(info->vport.base_mac_addr));
|
||
|
|
mutex_lock(&adapter->lock);
|
||
|
|
eth_commit_mac_addr_change(netdev, &saddr);
|
||
|
|
memcpy(adapter->vema_mac_addr,
|
||
|
|
info->vport.base_mac_addr, ETH_ALEN);
|
||
|
|
mutex_unlock(&adapter->lock);
|
||
|
|
}
|
||
|
|
|
||
|
|
rn->set_id(netdev, info->vesw.vesw_id);
|
||
|
|
|
||
|
|
/* Handle MTU limit change */
|
||
|
|
rtnl_lock();
|
||
|
|
netdev->max_mtu = max_t(unsigned int, info->vesw.eth_mtu,
|
||
|
|
netdev->min_mtu);
|
||
|
|
if (netdev->mtu > netdev->max_mtu)
|
||
|
|
dev_set_mtu(netdev, netdev->max_mtu);
|
||
|
|
rtnl_unlock();
|
||
|
|
|
||
|
|
/* Update flow to default port redirection table */
|
||
|
|
port_mask = info->vesw.def_port_mask;
|
||
|
|
for (i = 0; i < OPA_VESW_MAX_NUM_DEF_PORT; i++) {
|
||
|
|
if (port_mask & 1)
|
||
|
|
port_num[port_count++] = i;
|
||
|
|
port_mask >>= 1;
|
||
|
|
}
|
||
|
|
|
||
|
|
/*
|
||
|
|
* Build the flow table. Flow table is required when destination LID
|
||
|
|
* is not available. Up to OPA_VNIC_FLOW_TBL_SIZE flows supported.
|
||
|
|
* Each flow need a default port number to get its dlid from the
|
||
|
|
* u_ucast_dlid array.
|
||
|
|
*/
|
||
|
|
for (i = 0; i < OPA_VNIC_FLOW_TBL_SIZE; i++)
|
||
|
|
adapter->flow_tbl[i] = port_count ? port_num[i % port_count] :
|
||
|
|
OPA_VNIC_INVALID_PORT;
|
||
|
|
|
||
|
|
/* update state */
|
||
|
|
opa_vnic_update_state(adapter, !!(netdev->flags & IFF_UP));
|
||
|
|
}
|
||
|
|
|
||
|
|
/*
|
||
|
|
* Set the power on default values in adapter's vema interface structure.
|
||
|
|
*/
|
||
|
|
static inline void opa_vnic_set_pod_values(struct opa_vnic_adapter *adapter)
|
||
|
|
{
|
||
|
|
adapter->info.vport.max_mac_tbl_ent = OPA_VNIC_MAC_TBL_MAX_ENTRIES;
|
||
|
|
adapter->info.vport.max_smac_ent = OPA_VNIC_MAX_SMAC_LIMIT;
|
||
|
|
adapter->info.vport.config_state = OPA_VNIC_STATE_DROP_ALL;
|
||
|
|
adapter->info.vport.eth_link_status = OPA_VNIC_ETH_LINK_DOWN;
|
||
|
|
adapter->info.vesw.eth_mtu = ETH_DATA_LEN;
|
||
|
|
}
|
||
|
|
|
||
|
|
/* opa_vnic_set_mac_addr - change mac address */
|
||
|
|
static int opa_vnic_set_mac_addr(struct net_device *netdev, void *addr)
|
||
|
|
{
|
||
|
|
struct opa_vnic_adapter *adapter = opa_vnic_priv(netdev);
|
||
|
|
struct sockaddr *sa = addr;
|
||
|
|
int rc;
|
||
|
|
|
||
|
|
if (!memcmp(netdev->dev_addr, sa->sa_data, ETH_ALEN))
|
||
|
|
return 0;
|
||
|
|
|
||
|
|
mutex_lock(&adapter->lock);
|
||
|
|
rc = eth_mac_addr(netdev, addr);
|
||
|
|
mutex_unlock(&adapter->lock);
|
||
|
|
if (rc)
|
||
|
|
return rc;
|
||
|
|
|
||
|
|
adapter->info.vport.uc_macs_gen_count++;
|
||
|
|
opa_vnic_vema_report_event(adapter,
|
||
|
|
OPA_VESWPORT_TRAP_IFACE_UCAST_MAC_CHANGE);
|
||
|
|
return 0;
|
||
|
|
}
|
||
|
|
|
||
|
|
/*
|
||
|
|
* opa_vnic_mac_send_event - post event on possible mac list exchange
|
||
|
|
* Send trap when digest from uc/mc mac list differs from previous run.
|
||
|
|
* Digest is evaluated similar to how cksum does.
|
||
|
|
*/
|
||
|
|
static void opa_vnic_mac_send_event(struct net_device *netdev, u8 event)
|
||
|
|
{
|
||
|
|
struct opa_vnic_adapter *adapter = opa_vnic_priv(netdev);
|
||
|
|
struct netdev_hw_addr *ha;
|
||
|
|
struct netdev_hw_addr_list *hw_list;
|
||
|
|
u32 *ref_crc;
|
||
|
|
u32 l, crc = 0;
|
||
|
|
|
||
|
|
switch (event) {
|
||
|
|
case OPA_VESWPORT_TRAP_IFACE_UCAST_MAC_CHANGE:
|
||
|
|
hw_list = &netdev->uc;
|
||
|
|
adapter->info.vport.uc_macs_gen_count++;
|
||
|
|
ref_crc = &adapter->umac_hash;
|
||
|
|
break;
|
||
|
|
case OPA_VESWPORT_TRAP_IFACE_MCAST_MAC_CHANGE:
|
||
|
|
hw_list = &netdev->mc;
|
||
|
|
adapter->info.vport.mc_macs_gen_count++;
|
||
|
|
ref_crc = &adapter->mmac_hash;
|
||
|
|
break;
|
||
|
|
default:
|
||
|
|
return;
|
||
|
|
}
|
||
|
|
netdev_hw_addr_list_for_each(ha, hw_list) {
|
||
|
|
crc = crc32_le(crc, ha->addr, ETH_ALEN);
|
||
|
|
}
|
||
|
|
l = netdev_hw_addr_list_count(hw_list) * ETH_ALEN;
|
||
|
|
crc = ~crc32_le(crc, (void *)&l, sizeof(l));
|
||
|
|
|
||
|
|
if (crc != *ref_crc) {
|
||
|
|
*ref_crc = crc;
|
||
|
|
opa_vnic_vema_report_event(adapter, event);
|
||
|
|
}
|
||
|
|
}
|
||
|
|
|
||
|
|
/* opa_vnic_set_rx_mode - handle uc/mc mac list change */
|
||
|
|
static void opa_vnic_set_rx_mode(struct net_device *netdev)
|
||
|
|
{
|
||
|
|
opa_vnic_mac_send_event(netdev,
|
||
|
|
OPA_VESWPORT_TRAP_IFACE_UCAST_MAC_CHANGE);
|
||
|
|
|
||
|
|
opa_vnic_mac_send_event(netdev,
|
||
|
|
OPA_VESWPORT_TRAP_IFACE_MCAST_MAC_CHANGE);
|
||
|
|
}
|
||
|
|
|
||
|
|
/* opa_netdev_open - activate network interface */
|
||
|
|
static int opa_netdev_open(struct net_device *netdev)
|
||
|
|
{
|
||
|
|
struct opa_vnic_adapter *adapter = opa_vnic_priv(netdev);
|
||
|
|
int rc;
|
||
|
|
|
||
|
|
rc = adapter->rn_ops->ndo_open(adapter->netdev);
|
||
|
|
if (rc) {
|
||
|
|
v_dbg("open failed %d\n", rc);
|
||
|
|
return rc;
|
||
|
|
}
|
||
|
|
|
||
|
|
/* Update status and send trap */
|
||
|
|
opa_vnic_update_state(adapter, true);
|
||
|
|
opa_vnic_vema_report_event(adapter,
|
||
|
|
OPA_VESWPORT_TRAP_ETH_LINK_STATUS_CHANGE);
|
||
|
|
return 0;
|
||
|
|
}
|
||
|
|
|
||
|
|
/* opa_netdev_close - disable network interface */
|
||
|
|
static int opa_netdev_close(struct net_device *netdev)
|
||
|
|
{
|
||
|
|
struct opa_vnic_adapter *adapter = opa_vnic_priv(netdev);
|
||
|
|
int rc;
|
||
|
|
|
||
|
|
rc = adapter->rn_ops->ndo_stop(adapter->netdev);
|
||
|
|
if (rc) {
|
||
|
|
v_dbg("close failed %d\n", rc);
|
||
|
|
return rc;
|
||
|
|
}
|
||
|
|
|
||
|
|
/* Update status and send trap */
|
||
|
|
opa_vnic_update_state(adapter, false);
|
||
|
|
opa_vnic_vema_report_event(adapter,
|
||
|
|
OPA_VESWPORT_TRAP_ETH_LINK_STATUS_CHANGE);
|
||
|
|
return 0;
|
||
|
|
}
|
||
|
|
|
||
|
|
/* netdev ops */
|
||
|
|
static const struct net_device_ops opa_netdev_ops = {
|
||
|
|
.ndo_open = opa_netdev_open,
|
||
|
|
.ndo_stop = opa_netdev_close,
|
||
|
|
.ndo_start_xmit = opa_netdev_start_xmit,
|
||
|
|
.ndo_get_stats64 = opa_vnic_get_stats64,
|
||
|
|
.ndo_set_rx_mode = opa_vnic_set_rx_mode,
|
||
|
|
.ndo_select_queue = opa_vnic_select_queue,
|
||
|
|
.ndo_set_mac_address = opa_vnic_set_mac_addr,
|
||
|
|
};
|
||
|
|
|
||
|
|
/* opa_vnic_add_netdev - create vnic netdev interface */
|
||
|
|
struct opa_vnic_adapter *opa_vnic_add_netdev(struct ib_device *ibdev,
|
||
|
|
u8 port_num, u8 vport_num)
|
||
|
|
{
|
||
|
|
struct opa_vnic_adapter *adapter;
|
||
|
|
struct net_device *netdev;
|
||
|
|
struct rdma_netdev *rn;
|
||
|
|
int rc;
|
||
|
|
|
||
|
|
netdev = ibdev->ops.alloc_rdma_netdev(ibdev, port_num,
|
||
|
|
RDMA_NETDEV_OPA_VNIC,
|
||
|
|
"veth%d", NET_NAME_UNKNOWN,
|
||
|
|
ether_setup);
|
||
|
|
if (!netdev)
|
||
|
|
return ERR_PTR(-ENOMEM);
|
||
|
|
else if (IS_ERR(netdev))
|
||
|
|
return ERR_CAST(netdev);
|
||
|
|
|
||
|
|
rn = netdev_priv(netdev);
|
||
|
|
adapter = kzalloc(sizeof(*adapter), GFP_KERNEL);
|
||
|
|
if (!adapter) {
|
||
|
|
rc = -ENOMEM;
|
||
|
|
goto adapter_err;
|
||
|
|
}
|
||
|
|
|
||
|
|
rn->clnt_priv = adapter;
|
||
|
|
rn->hca = ibdev;
|
||
|
|
rn->port_num = port_num;
|
||
|
|
adapter->netdev = netdev;
|
||
|
|
adapter->ibdev = ibdev;
|
||
|
|
adapter->port_num = port_num;
|
||
|
|
adapter->vport_num = vport_num;
|
||
|
|
adapter->rn_ops = netdev->netdev_ops;
|
||
|
|
|
||
|
|
netdev->netdev_ops = &opa_netdev_ops;
|
||
|
|
netdev->priv_flags |= IFF_LIVE_ADDR_CHANGE;
|
||
|
|
netdev->hard_header_len += OPA_VNIC_SKB_HEADROOM;
|
||
|
|
mutex_init(&adapter->lock);
|
||
|
|
mutex_init(&adapter->mactbl_lock);
|
||
|
|
spin_lock_init(&adapter->stats_lock);
|
||
|
|
|
||
|
|
SET_NETDEV_DEV(netdev, ibdev->dev.parent);
|
||
|
|
|
||
|
|
opa_vnic_set_ethtool_ops(netdev);
|
||
|
|
|
||
|
|
opa_vnic_set_pod_values(adapter);
|
||
|
|
|
||
|
|
rc = register_netdev(netdev);
|
||
|
|
if (rc)
|
||
|
|
goto netdev_err;
|
||
|
|
|
||
|
|
netif_carrier_off(netdev);
|
||
|
|
netif_dormant_on(netdev);
|
||
|
|
v_info("initialized\n");
|
||
|
|
|
||
|
|
return adapter;
|
||
|
|
netdev_err:
|
||
|
|
mutex_destroy(&adapter->lock);
|
||
|
|
mutex_destroy(&adapter->mactbl_lock);
|
||
|
|
kfree(adapter);
|
||
|
|
adapter_err:
|
||
|
|
rn->free_rdma_netdev(netdev);
|
||
|
|
|
||
|
|
return ERR_PTR(rc);
|
||
|
|
}
|
||
|
|
|
||
|
|
/* opa_vnic_rem_netdev - remove vnic netdev interface */
|
||
|
|
void opa_vnic_rem_netdev(struct opa_vnic_adapter *adapter)
|
||
|
|
{
|
||
|
|
struct net_device *netdev = adapter->netdev;
|
||
|
|
struct rdma_netdev *rn = netdev_priv(netdev);
|
||
|
|
|
||
|
|
v_info("removing\n");
|
||
|
|
unregister_netdev(netdev);
|
||
|
|
opa_vnic_release_mac_tbl(adapter);
|
||
|
|
mutex_destroy(&adapter->lock);
|
||
|
|
mutex_destroy(&adapter->mactbl_lock);
|
||
|
|
kfree(adapter);
|
||
|
|
rn->free_rdma_netdev(netdev);
|
||
|
|
}
|