616 lines
16 KiB
C
616 lines
16 KiB
C
// SPDX-License-Identifier: GPL-2.0 or BSD-3-Clause
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/*
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* Copyright(c) 2017 - 2020 Intel Corporation.
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*/
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/*
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* This file contains HFI1 support for VNIC functionality
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*/
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#include <linux/io.h>
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#include <linux/if_vlan.h>
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#include "vnic.h"
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#include "netdev.h"
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#define HFI_TX_TIMEOUT_MS 1000
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#define HFI1_VNIC_RCV_Q_SIZE 1024
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#define HFI1_VNIC_UP 0
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static DEFINE_SPINLOCK(vport_cntr_lock);
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#define SUM_GRP_COUNTERS(stats, qstats, x_grp) do { \
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u64 *src64, *dst64; \
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for (src64 = &qstats->x_grp.unicast, \
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dst64 = &stats->x_grp.unicast; \
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dst64 <= &stats->x_grp.s_1519_max;) { \
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*dst64++ += *src64++; \
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} \
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} while (0)
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#define VNIC_MASK (0xFF)
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#define VNIC_ID(val) ((1ull << 24) | ((val) & VNIC_MASK))
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/* hfi1_vnic_update_stats - update statistics */
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static void hfi1_vnic_update_stats(struct hfi1_vnic_vport_info *vinfo,
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struct opa_vnic_stats *stats)
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{
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struct net_device *netdev = vinfo->netdev;
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u8 i;
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/* add tx counters on different queues */
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for (i = 0; i < vinfo->num_tx_q; i++) {
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struct opa_vnic_stats *qstats = &vinfo->stats[i];
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struct rtnl_link_stats64 *qnstats = &vinfo->stats[i].netstats;
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stats->netstats.tx_fifo_errors += qnstats->tx_fifo_errors;
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stats->netstats.tx_carrier_errors += qnstats->tx_carrier_errors;
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stats->tx_drop_state += qstats->tx_drop_state;
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stats->tx_dlid_zero += qstats->tx_dlid_zero;
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SUM_GRP_COUNTERS(stats, qstats, tx_grp);
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stats->netstats.tx_packets += qnstats->tx_packets;
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stats->netstats.tx_bytes += qnstats->tx_bytes;
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}
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/* add rx counters on different queues */
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for (i = 0; i < vinfo->num_rx_q; i++) {
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struct opa_vnic_stats *qstats = &vinfo->stats[i];
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struct rtnl_link_stats64 *qnstats = &vinfo->stats[i].netstats;
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stats->netstats.rx_fifo_errors += qnstats->rx_fifo_errors;
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stats->netstats.rx_nohandler += qnstats->rx_nohandler;
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stats->rx_drop_state += qstats->rx_drop_state;
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stats->rx_oversize += qstats->rx_oversize;
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stats->rx_runt += qstats->rx_runt;
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SUM_GRP_COUNTERS(stats, qstats, rx_grp);
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stats->netstats.rx_packets += qnstats->rx_packets;
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stats->netstats.rx_bytes += qnstats->rx_bytes;
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}
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stats->netstats.tx_errors = stats->netstats.tx_fifo_errors +
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stats->netstats.tx_carrier_errors +
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stats->tx_drop_state + stats->tx_dlid_zero;
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stats->netstats.tx_dropped = stats->netstats.tx_errors;
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stats->netstats.rx_errors = stats->netstats.rx_fifo_errors +
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stats->netstats.rx_nohandler +
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stats->rx_drop_state + stats->rx_oversize +
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stats->rx_runt;
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stats->netstats.rx_dropped = stats->netstats.rx_errors;
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netdev->stats.tx_packets = stats->netstats.tx_packets;
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netdev->stats.tx_bytes = stats->netstats.tx_bytes;
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netdev->stats.tx_fifo_errors = stats->netstats.tx_fifo_errors;
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netdev->stats.tx_carrier_errors = stats->netstats.tx_carrier_errors;
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netdev->stats.tx_errors = stats->netstats.tx_errors;
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netdev->stats.tx_dropped = stats->netstats.tx_dropped;
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netdev->stats.rx_packets = stats->netstats.rx_packets;
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netdev->stats.rx_bytes = stats->netstats.rx_bytes;
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netdev->stats.rx_fifo_errors = stats->netstats.rx_fifo_errors;
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netdev->stats.multicast = stats->rx_grp.mcastbcast;
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netdev->stats.rx_length_errors = stats->rx_oversize + stats->rx_runt;
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netdev->stats.rx_errors = stats->netstats.rx_errors;
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netdev->stats.rx_dropped = stats->netstats.rx_dropped;
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}
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/* update_len_counters - update pkt's len histogram counters */
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static inline void update_len_counters(struct opa_vnic_grp_stats *grp,
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int len)
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{
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/* account for 4 byte FCS */
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if (len >= 1515)
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grp->s_1519_max++;
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else if (len >= 1020)
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grp->s_1024_1518++;
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else if (len >= 508)
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grp->s_512_1023++;
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else if (len >= 252)
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grp->s_256_511++;
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else if (len >= 124)
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grp->s_128_255++;
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else if (len >= 61)
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grp->s_65_127++;
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else
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grp->s_64++;
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}
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/* hfi1_vnic_update_tx_counters - update transmit counters */
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static void hfi1_vnic_update_tx_counters(struct hfi1_vnic_vport_info *vinfo,
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u8 q_idx, struct sk_buff *skb, int err)
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{
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struct ethhdr *mac_hdr = (struct ethhdr *)skb_mac_header(skb);
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struct opa_vnic_stats *stats = &vinfo->stats[q_idx];
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struct opa_vnic_grp_stats *tx_grp = &stats->tx_grp;
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u16 vlan_tci;
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stats->netstats.tx_packets++;
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stats->netstats.tx_bytes += skb->len + ETH_FCS_LEN;
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update_len_counters(tx_grp, skb->len);
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/* rest of the counts are for good packets only */
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if (unlikely(err))
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return;
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if (is_multicast_ether_addr(mac_hdr->h_dest))
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tx_grp->mcastbcast++;
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else
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tx_grp->unicast++;
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if (!__vlan_get_tag(skb, &vlan_tci))
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tx_grp->vlan++;
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else
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tx_grp->untagged++;
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}
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/* hfi1_vnic_update_rx_counters - update receive counters */
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static void hfi1_vnic_update_rx_counters(struct hfi1_vnic_vport_info *vinfo,
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u8 q_idx, struct sk_buff *skb, int err)
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{
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struct ethhdr *mac_hdr = (struct ethhdr *)skb->data;
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struct opa_vnic_stats *stats = &vinfo->stats[q_idx];
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struct opa_vnic_grp_stats *rx_grp = &stats->rx_grp;
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u16 vlan_tci;
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stats->netstats.rx_packets++;
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stats->netstats.rx_bytes += skb->len + ETH_FCS_LEN;
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update_len_counters(rx_grp, skb->len);
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/* rest of the counts are for good packets only */
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if (unlikely(err))
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return;
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if (is_multicast_ether_addr(mac_hdr->h_dest))
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rx_grp->mcastbcast++;
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else
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rx_grp->unicast++;
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if (!__vlan_get_tag(skb, &vlan_tci))
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rx_grp->vlan++;
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else
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rx_grp->untagged++;
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}
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/* This function is overloaded for opa_vnic specific implementation */
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static void hfi1_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_stats *vstats = (struct opa_vnic_stats *)stats;
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struct hfi1_vnic_vport_info *vinfo = opa_vnic_dev_priv(netdev);
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hfi1_vnic_update_stats(vinfo, vstats);
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}
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static u64 create_bypass_pbc(u32 vl, u32 dw_len)
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{
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u64 pbc;
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pbc = ((u64)PBC_IHCRC_NONE << PBC_INSERT_HCRC_SHIFT)
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| PBC_INSERT_BYPASS_ICRC | PBC_CREDIT_RETURN
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| PBC_PACKET_BYPASS
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| ((vl & PBC_VL_MASK) << PBC_VL_SHIFT)
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| (dw_len & PBC_LENGTH_DWS_MASK) << PBC_LENGTH_DWS_SHIFT;
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return pbc;
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}
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/* hfi1_vnic_maybe_stop_tx - stop tx queue if required */
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static void hfi1_vnic_maybe_stop_tx(struct hfi1_vnic_vport_info *vinfo,
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u8 q_idx)
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{
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netif_stop_subqueue(vinfo->netdev, q_idx);
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if (!hfi1_vnic_sdma_write_avail(vinfo, q_idx))
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return;
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netif_start_subqueue(vinfo->netdev, q_idx);
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}
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static netdev_tx_t hfi1_netdev_start_xmit(struct sk_buff *skb,
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struct net_device *netdev)
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{
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struct hfi1_vnic_vport_info *vinfo = opa_vnic_dev_priv(netdev);
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u8 pad_len, q_idx = skb->queue_mapping;
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struct hfi1_devdata *dd = vinfo->dd;
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struct opa_vnic_skb_mdata *mdata;
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u32 pkt_len, total_len;
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int err = -EINVAL;
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u64 pbc;
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v_dbg("xmit: queue %d skb len %d\n", q_idx, skb->len);
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if (unlikely(!netif_oper_up(netdev))) {
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vinfo->stats[q_idx].tx_drop_state++;
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goto tx_finish;
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}
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/* take out meta data */
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mdata = (struct opa_vnic_skb_mdata *)skb->data;
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skb_pull(skb, sizeof(*mdata));
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if (unlikely(mdata->flags & OPA_VNIC_SKB_MDATA_ENCAP_ERR)) {
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vinfo->stats[q_idx].tx_dlid_zero++;
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goto tx_finish;
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}
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/* add tail padding (for 8 bytes size alignment) and icrc */
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pad_len = -(skb->len + OPA_VNIC_ICRC_TAIL_LEN) & 0x7;
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pad_len += OPA_VNIC_ICRC_TAIL_LEN;
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/*
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* pkt_len is how much data we have to write, includes header and data.
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* total_len is length of the packet in Dwords plus the PBC should not
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* include the CRC.
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*/
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pkt_len = (skb->len + pad_len) >> 2;
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total_len = pkt_len + 2; /* PBC + packet */
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pbc = create_bypass_pbc(mdata->vl, total_len);
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skb_get(skb);
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v_dbg("pbc 0x%016llX len %d pad_len %d\n", pbc, skb->len, pad_len);
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err = dd->process_vnic_dma_send(dd, q_idx, vinfo, skb, pbc, pad_len);
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if (unlikely(err)) {
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if (err == -ENOMEM)
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vinfo->stats[q_idx].netstats.tx_fifo_errors++;
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else if (err != -EBUSY)
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vinfo->stats[q_idx].netstats.tx_carrier_errors++;
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}
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/* remove the header before updating tx counters */
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skb_pull(skb, OPA_VNIC_HDR_LEN);
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if (unlikely(err == -EBUSY)) {
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hfi1_vnic_maybe_stop_tx(vinfo, q_idx);
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dev_kfree_skb_any(skb);
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return NETDEV_TX_BUSY;
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}
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tx_finish:
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/* update tx counters */
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hfi1_vnic_update_tx_counters(vinfo, q_idx, skb, err);
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dev_kfree_skb_any(skb);
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return NETDEV_TX_OK;
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}
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static u16 hfi1_vnic_select_queue(struct net_device *netdev,
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struct sk_buff *skb,
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struct net_device *sb_dev)
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{
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struct hfi1_vnic_vport_info *vinfo = opa_vnic_dev_priv(netdev);
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struct opa_vnic_skb_mdata *mdata;
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struct sdma_engine *sde;
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mdata = (struct opa_vnic_skb_mdata *)skb->data;
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sde = sdma_select_engine_vl(vinfo->dd, mdata->entropy, mdata->vl);
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return sde->this_idx;
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}
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/* hfi1_vnic_decap_skb - strip OPA header from the skb (ethernet) packet */
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static inline int hfi1_vnic_decap_skb(struct hfi1_vnic_rx_queue *rxq,
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struct sk_buff *skb)
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{
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struct hfi1_vnic_vport_info *vinfo = rxq->vinfo;
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int max_len = vinfo->netdev->mtu + VLAN_ETH_HLEN;
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int rc = -EFAULT;
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skb_pull(skb, OPA_VNIC_HDR_LEN);
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/* Validate Packet length */
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if (unlikely(skb->len > max_len))
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vinfo->stats[rxq->idx].rx_oversize++;
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else if (unlikely(skb->len < ETH_ZLEN))
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vinfo->stats[rxq->idx].rx_runt++;
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else
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rc = 0;
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return rc;
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}
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static struct hfi1_vnic_vport_info *get_vnic_port(struct hfi1_devdata *dd,
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int vesw_id)
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{
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int vnic_id = VNIC_ID(vesw_id);
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return hfi1_netdev_get_data(dd, vnic_id);
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}
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static struct hfi1_vnic_vport_info *get_first_vnic_port(struct hfi1_devdata *dd)
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{
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struct hfi1_vnic_vport_info *vinfo;
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int next_id = VNIC_ID(0);
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vinfo = hfi1_netdev_get_first_data(dd, &next_id);
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if (next_id > VNIC_ID(VNIC_MASK))
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return NULL;
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return vinfo;
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}
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void hfi1_vnic_bypass_rcv(struct hfi1_packet *packet)
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{
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struct hfi1_devdata *dd = packet->rcd->dd;
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struct hfi1_vnic_vport_info *vinfo = NULL;
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struct hfi1_vnic_rx_queue *rxq;
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struct sk_buff *skb;
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int l4_type, vesw_id = -1, rc;
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u8 q_idx;
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unsigned char *pad_info;
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l4_type = hfi1_16B_get_l4(packet->ebuf);
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if (likely(l4_type == OPA_16B_L4_ETHR)) {
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vesw_id = HFI1_VNIC_GET_VESWID(packet->ebuf);
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vinfo = get_vnic_port(dd, vesw_id);
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/*
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* In case of invalid vesw id, count the error on
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* the first available vport.
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*/
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if (unlikely(!vinfo)) {
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struct hfi1_vnic_vport_info *vinfo_tmp;
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vinfo_tmp = get_first_vnic_port(dd);
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if (vinfo_tmp) {
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spin_lock(&vport_cntr_lock);
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vinfo_tmp->stats[0].netstats.rx_nohandler++;
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spin_unlock(&vport_cntr_lock);
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}
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}
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}
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if (unlikely(!vinfo)) {
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dd_dev_warn(dd, "vnic rcv err: l4 %d vesw id %d ctx %d\n",
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l4_type, vesw_id, packet->rcd->ctxt);
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return;
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}
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q_idx = packet->rcd->vnic_q_idx;
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rxq = &vinfo->rxq[q_idx];
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if (unlikely(!netif_oper_up(vinfo->netdev))) {
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vinfo->stats[q_idx].rx_drop_state++;
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return;
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}
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skb = netdev_alloc_skb(vinfo->netdev, packet->tlen);
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if (unlikely(!skb)) {
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vinfo->stats[q_idx].netstats.rx_fifo_errors++;
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return;
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}
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memcpy(skb->data, packet->ebuf, packet->tlen);
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skb_put(skb, packet->tlen);
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pad_info = skb->data + skb->len - 1;
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skb_trim(skb, (skb->len - OPA_VNIC_ICRC_TAIL_LEN -
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((*pad_info) & 0x7)));
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rc = hfi1_vnic_decap_skb(rxq, skb);
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/* update rx counters */
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hfi1_vnic_update_rx_counters(vinfo, rxq->idx, skb, rc);
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if (unlikely(rc)) {
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dev_kfree_skb_any(skb);
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return;
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}
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skb_checksum_none_assert(skb);
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skb->protocol = eth_type_trans(skb, rxq->netdev);
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napi_gro_receive(&rxq->napi, skb);
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}
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static int hfi1_vnic_up(struct hfi1_vnic_vport_info *vinfo)
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{
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struct hfi1_devdata *dd = vinfo->dd;
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struct net_device *netdev = vinfo->netdev;
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int rc;
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/* ensure virtual eth switch id is valid */
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if (!vinfo->vesw_id)
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return -EINVAL;
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rc = hfi1_netdev_add_data(dd, VNIC_ID(vinfo->vesw_id), vinfo);
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if (rc < 0)
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return rc;
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rc = hfi1_netdev_rx_init(dd);
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if (rc)
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goto err_remove;
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netif_carrier_on(netdev);
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netif_tx_start_all_queues(netdev);
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set_bit(HFI1_VNIC_UP, &vinfo->flags);
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return 0;
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err_remove:
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hfi1_netdev_remove_data(dd, VNIC_ID(vinfo->vesw_id));
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return rc;
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}
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static void hfi1_vnic_down(struct hfi1_vnic_vport_info *vinfo)
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{
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struct hfi1_devdata *dd = vinfo->dd;
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clear_bit(HFI1_VNIC_UP, &vinfo->flags);
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netif_carrier_off(vinfo->netdev);
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netif_tx_disable(vinfo->netdev);
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hfi1_netdev_remove_data(dd, VNIC_ID(vinfo->vesw_id));
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hfi1_netdev_rx_destroy(dd);
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}
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static int hfi1_netdev_open(struct net_device *netdev)
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{
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struct hfi1_vnic_vport_info *vinfo = opa_vnic_dev_priv(netdev);
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int rc;
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mutex_lock(&vinfo->lock);
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rc = hfi1_vnic_up(vinfo);
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mutex_unlock(&vinfo->lock);
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return rc;
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}
|
|
|
|
static int hfi1_netdev_close(struct net_device *netdev)
|
|
{
|
|
struct hfi1_vnic_vport_info *vinfo = opa_vnic_dev_priv(netdev);
|
|
|
|
mutex_lock(&vinfo->lock);
|
|
if (test_bit(HFI1_VNIC_UP, &vinfo->flags))
|
|
hfi1_vnic_down(vinfo);
|
|
mutex_unlock(&vinfo->lock);
|
|
return 0;
|
|
}
|
|
|
|
static int hfi1_vnic_init(struct hfi1_vnic_vport_info *vinfo)
|
|
{
|
|
struct hfi1_devdata *dd = vinfo->dd;
|
|
int rc = 0;
|
|
|
|
mutex_lock(&hfi1_mutex);
|
|
if (!dd->vnic_num_vports) {
|
|
rc = hfi1_vnic_txreq_init(dd);
|
|
if (rc)
|
|
goto txreq_fail;
|
|
}
|
|
|
|
rc = hfi1_netdev_rx_init(dd);
|
|
if (rc) {
|
|
dd_dev_err(dd, "Unable to initialize netdev contexts\n");
|
|
goto alloc_fail;
|
|
}
|
|
|
|
hfi1_init_vnic_rsm(dd);
|
|
|
|
dd->vnic_num_vports++;
|
|
hfi1_vnic_sdma_init(vinfo);
|
|
|
|
alloc_fail:
|
|
if (!dd->vnic_num_vports)
|
|
hfi1_vnic_txreq_deinit(dd);
|
|
txreq_fail:
|
|
mutex_unlock(&hfi1_mutex);
|
|
return rc;
|
|
}
|
|
|
|
static void hfi1_vnic_deinit(struct hfi1_vnic_vport_info *vinfo)
|
|
{
|
|
struct hfi1_devdata *dd = vinfo->dd;
|
|
|
|
mutex_lock(&hfi1_mutex);
|
|
if (--dd->vnic_num_vports == 0) {
|
|
hfi1_deinit_vnic_rsm(dd);
|
|
hfi1_vnic_txreq_deinit(dd);
|
|
}
|
|
mutex_unlock(&hfi1_mutex);
|
|
hfi1_netdev_rx_destroy(dd);
|
|
}
|
|
|
|
static void hfi1_vnic_set_vesw_id(struct net_device *netdev, int id)
|
|
{
|
|
struct hfi1_vnic_vport_info *vinfo = opa_vnic_dev_priv(netdev);
|
|
bool reopen = false;
|
|
|
|
/*
|
|
* If vesw_id is being changed, and if the vnic port is up,
|
|
* reset the vnic port to ensure new vesw_id gets picked up
|
|
*/
|
|
if (id != vinfo->vesw_id) {
|
|
mutex_lock(&vinfo->lock);
|
|
if (test_bit(HFI1_VNIC_UP, &vinfo->flags)) {
|
|
hfi1_vnic_down(vinfo);
|
|
reopen = true;
|
|
}
|
|
|
|
vinfo->vesw_id = id;
|
|
if (reopen)
|
|
hfi1_vnic_up(vinfo);
|
|
|
|
mutex_unlock(&vinfo->lock);
|
|
}
|
|
}
|
|
|
|
/* netdev ops */
|
|
static const struct net_device_ops hfi1_netdev_ops = {
|
|
.ndo_open = hfi1_netdev_open,
|
|
.ndo_stop = hfi1_netdev_close,
|
|
.ndo_start_xmit = hfi1_netdev_start_xmit,
|
|
.ndo_select_queue = hfi1_vnic_select_queue,
|
|
.ndo_get_stats64 = hfi1_vnic_get_stats64,
|
|
};
|
|
|
|
static void hfi1_vnic_free_rn(struct net_device *netdev)
|
|
{
|
|
struct hfi1_vnic_vport_info *vinfo = opa_vnic_dev_priv(netdev);
|
|
|
|
hfi1_vnic_deinit(vinfo);
|
|
mutex_destroy(&vinfo->lock);
|
|
free_netdev(netdev);
|
|
}
|
|
|
|
struct net_device *hfi1_vnic_alloc_rn(struct ib_device *device,
|
|
u32 port_num,
|
|
enum rdma_netdev_t type,
|
|
const char *name,
|
|
unsigned char name_assign_type,
|
|
void (*setup)(struct net_device *))
|
|
{
|
|
struct hfi1_devdata *dd = dd_from_ibdev(device);
|
|
struct hfi1_vnic_vport_info *vinfo;
|
|
struct net_device *netdev;
|
|
struct rdma_netdev *rn;
|
|
int i, size, rc;
|
|
|
|
if (!dd->num_netdev_contexts)
|
|
return ERR_PTR(-ENOMEM);
|
|
|
|
if (!port_num || (port_num > dd->num_pports))
|
|
return ERR_PTR(-EINVAL);
|
|
|
|
if (type != RDMA_NETDEV_OPA_VNIC)
|
|
return ERR_PTR(-EOPNOTSUPP);
|
|
|
|
size = sizeof(struct opa_vnic_rdma_netdev) + sizeof(*vinfo);
|
|
netdev = alloc_netdev_mqs(size, name, name_assign_type, setup,
|
|
chip_sdma_engines(dd),
|
|
dd->num_netdev_contexts);
|
|
if (!netdev)
|
|
return ERR_PTR(-ENOMEM);
|
|
|
|
rn = netdev_priv(netdev);
|
|
vinfo = opa_vnic_dev_priv(netdev);
|
|
vinfo->dd = dd;
|
|
vinfo->num_tx_q = chip_sdma_engines(dd);
|
|
vinfo->num_rx_q = dd->num_netdev_contexts;
|
|
vinfo->netdev = netdev;
|
|
rn->free_rdma_netdev = hfi1_vnic_free_rn;
|
|
rn->set_id = hfi1_vnic_set_vesw_id;
|
|
|
|
netdev->features = NETIF_F_HIGHDMA | NETIF_F_SG;
|
|
netdev->hw_features = netdev->features;
|
|
netdev->vlan_features = netdev->features;
|
|
netdev->watchdog_timeo = msecs_to_jiffies(HFI_TX_TIMEOUT_MS);
|
|
netdev->netdev_ops = &hfi1_netdev_ops;
|
|
mutex_init(&vinfo->lock);
|
|
|
|
for (i = 0; i < vinfo->num_rx_q; i++) {
|
|
struct hfi1_vnic_rx_queue *rxq = &vinfo->rxq[i];
|
|
|
|
rxq->idx = i;
|
|
rxq->vinfo = vinfo;
|
|
rxq->netdev = netdev;
|
|
}
|
|
|
|
rc = hfi1_vnic_init(vinfo);
|
|
if (rc)
|
|
goto init_fail;
|
|
|
|
return netdev;
|
|
init_fail:
|
|
mutex_destroy(&vinfo->lock);
|
|
free_netdev(netdev);
|
|
return ERR_PTR(rc);
|
|
}
|