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