[mirror_ubuntu-bionic-kernel.git] / drivers / net / ethernet / mellanox / mlx5 / core / en_rep.c

/*
 * Copyright (c) 2016, 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 <generated/utsrelease.h>
#include <linux/mlx5/fs.h>
#include <net/switchdev.h>
#include <net/pkt_cls.h>

#include "eswitch.h"
#include "en.h"
#include "en_tc.h"

static const char mlx5e_rep_driver_name[] = "mlx5e_rep";

static void mlx5e_rep_get_drvinfo(struct net_device *dev,
                                  struct ethtool_drvinfo *drvinfo)
{
        strlcpy(drvinfo->driver, mlx5e_rep_driver_name,
                sizeof(drvinfo->driver));
        strlcpy(drvinfo->version, UTS_RELEASE, sizeof(drvinfo->version));
}

static const struct counter_desc sw_rep_stats_desc[] = {
        { MLX5E_DECLARE_STAT(struct mlx5e_sw_stats, rx_packets) },
        { MLX5E_DECLARE_STAT(struct mlx5e_sw_stats, rx_bytes) },
        { MLX5E_DECLARE_STAT(struct mlx5e_sw_stats, tx_packets) },
        { MLX5E_DECLARE_STAT(struct mlx5e_sw_stats, tx_bytes) },
};

#define NUM_VPORT_REP_COUNTERS  ARRAY_SIZE(sw_rep_stats_desc)

static void mlx5e_rep_get_strings(struct net_device *dev,
                                  u32 stringset, uint8_t *data)
{
        int i;

        switch (stringset) {
        case ETH_SS_STATS:
                for (i = 0; i < NUM_VPORT_REP_COUNTERS; i++)
                        strcpy(data + (i * ETH_GSTRING_LEN),
                               sw_rep_stats_desc[i].format);
                break;
        }
}

static void mlx5e_rep_update_hw_counters(struct mlx5e_priv *priv)
{
        struct mlx5_eswitch *esw = priv->mdev->priv.eswitch;
        struct mlx5_eswitch_rep *rep = priv->ppriv;
        struct rtnl_link_stats64 *vport_stats;
        struct ifla_vf_stats vf_stats;
        int err;

        err = mlx5_eswitch_get_vport_stats(esw, rep->vport, &vf_stats);
        if (err) {
                pr_warn("vport %d error %d reading stats\n", rep->vport, err);
                return;
        }

        vport_stats = &priv->stats.vf_vport;
        /* flip tx/rx as we are reporting the counters for the switch vport */
        vport_stats->rx_packets = vf_stats.tx_packets;
        vport_stats->rx_bytes   = vf_stats.tx_bytes;
        vport_stats->tx_packets = vf_stats.rx_packets;
        vport_stats->tx_bytes   = vf_stats.rx_bytes;
}

static void mlx5e_rep_update_sw_counters(struct mlx5e_priv *priv)
{
        struct mlx5e_sw_stats *s = &priv->stats.sw;
        struct mlx5e_rq_stats *rq_stats;
        struct mlx5e_sq_stats *sq_stats;
        int i, j;

        memset(s, 0, sizeof(*s));
        for (i = 0; i < priv->channels.num; i++) {
                struct mlx5e_channel *c = priv->channels.c[i];

                rq_stats = &c->rq.stats;

                s->rx_packets   += rq_stats->packets;
                s->rx_bytes     += rq_stats->bytes;

                for (j = 0; j < priv->channels.params.num_tc; j++) {
                        sq_stats = &c->sq[j].stats;

                        s->tx_packets           += sq_stats->packets;
                        s->tx_bytes             += sq_stats->bytes;
                }
        }
}

static void mlx5e_rep_update_stats(struct mlx5e_priv *priv)
{
        mlx5e_rep_update_sw_counters(priv);
        mlx5e_rep_update_hw_counters(priv);
}

static void mlx5e_rep_get_ethtool_stats(struct net_device *dev,
                                        struct ethtool_stats *stats, u64 *data)
{
        struct mlx5e_priv *priv = netdev_priv(dev);
        int i;

        if (!data)
                return;

        mutex_lock(&priv->state_lock);
        if (test_bit(MLX5E_STATE_OPENED, &priv->state))
                mlx5e_rep_update_sw_counters(priv);
        mutex_unlock(&priv->state_lock);

        for (i = 0; i < NUM_VPORT_REP_COUNTERS; i++)
                data[i] = MLX5E_READ_CTR64_CPU(&priv->stats.sw,
                                               sw_rep_stats_desc, i);
}

static int mlx5e_rep_get_sset_count(struct net_device *dev, int sset)
{
        switch (sset) {
        case ETH_SS_STATS:
                return NUM_VPORT_REP_COUNTERS;
        default:
                return -EOPNOTSUPP;
        }
}

static const struct ethtool_ops mlx5e_rep_ethtool_ops = {
        .get_drvinfo       = mlx5e_rep_get_drvinfo,
        .get_link          = ethtool_op_get_link,
        .get_strings       = mlx5e_rep_get_strings,
        .get_sset_count    = mlx5e_rep_get_sset_count,
        .get_ethtool_stats = mlx5e_rep_get_ethtool_stats,
};

int mlx5e_attr_get(struct net_device *dev, struct switchdev_attr *attr)
{
        struct mlx5e_priv *priv = netdev_priv(dev);
        struct mlx5_eswitch_rep *rep = priv->ppriv;
        struct mlx5_eswitch *esw = priv->mdev->priv.eswitch;

        if (esw->mode == SRIOV_NONE)
                return -EOPNOTSUPP;

        switch (attr->id) {
        case SWITCHDEV_ATTR_ID_PORT_PARENT_ID:
                attr->u.ppid.id_len = ETH_ALEN;
                ether_addr_copy(attr->u.ppid.id, rep->hw_id);
                break;
        default:
                return -EOPNOTSUPP;
        }

        return 0;
}

int mlx5e_add_sqs_fwd_rules(struct mlx5e_priv *priv)

{
        struct mlx5_eswitch *esw = priv->mdev->priv.eswitch;
        struct mlx5_eswitch_rep *rep = priv->ppriv;
        struct mlx5e_channel *c;
        int n, tc, num_sqs = 0;
        int err = -ENOMEM;
        u16 *sqs;

        sqs = kcalloc(priv->channels.num * priv->channels.params.num_tc, sizeof(u16), GFP_KERNEL);
        if (!sqs)
                goto out;

        for (n = 0; n < priv->channels.num; n++) {
                c = priv->channels.c[n];
                for (tc = 0; tc < c->num_tc; tc++)
                        sqs[num_sqs++] = c->sq[tc].sqn;
        }

        err = mlx5_eswitch_sqs2vport_start(esw, rep, sqs, num_sqs);
        kfree(sqs);

out:
        if (err)
                netdev_warn(priv->netdev, "Failed to add SQs FWD rules %d\n", err);
        return err;
}

int mlx5e_nic_rep_load(struct mlx5_eswitch *esw, struct mlx5_eswitch_rep *rep)
{
        struct net_device *netdev = rep->netdev;
        struct mlx5e_priv *priv = netdev_priv(netdev);

        if (test_bit(MLX5E_STATE_OPENED, &priv->state))
                return mlx5e_add_sqs_fwd_rules(priv);
        return 0;
}

void mlx5e_remove_sqs_fwd_rules(struct mlx5e_priv *priv)
{
        struct mlx5_eswitch *esw = priv->mdev->priv.eswitch;
        struct mlx5_eswitch_rep *rep = priv->ppriv;

        mlx5_eswitch_sqs2vport_stop(esw, rep);
}

void mlx5e_nic_rep_unload(struct mlx5_eswitch *esw,
                          struct mlx5_eswitch_rep *rep)
{
        struct net_device *netdev = rep->netdev;
        struct mlx5e_priv *priv = netdev_priv(netdev);

        if (test_bit(MLX5E_STATE_OPENED, &priv->state))
                mlx5e_remove_sqs_fwd_rules(priv);

        /* clean (and re-init) existing uplink offloaded TC rules */
        mlx5e_tc_cleanup(priv);
        mlx5e_tc_init(priv);
}

static int mlx5e_rep_open(struct net_device *dev)
{
        struct mlx5e_priv *priv = netdev_priv(dev);
        struct mlx5_eswitch_rep *rep = priv->ppriv;
        struct mlx5_eswitch *esw = priv->mdev->priv.eswitch;
        int err;

        err = mlx5e_open(dev);
        if (err)
                return err;

        err = mlx5_eswitch_set_vport_state(esw, rep->vport, MLX5_ESW_VPORT_ADMIN_STATE_UP);
        if (!err)
                netif_carrier_on(dev);

        return 0;
}

static int mlx5e_rep_close(struct net_device *dev)
{
        struct mlx5e_priv *priv = netdev_priv(dev);
        struct mlx5_eswitch_rep *rep = priv->ppriv;
        struct mlx5_eswitch *esw = priv->mdev->priv.eswitch;

        (void)mlx5_eswitch_set_vport_state(esw, rep->vport, MLX5_ESW_VPORT_ADMIN_STATE_DOWN);

        return mlx5e_close(dev);
}

static int mlx5e_rep_get_phys_port_name(struct net_device *dev,
                                        char *buf, size_t len)
{
        struct mlx5e_priv *priv = netdev_priv(dev);
        struct mlx5_eswitch_rep *rep = priv->ppriv;
        int ret;

        ret = snprintf(buf, len, "%d", rep->vport - 1);
        if (ret >= len)
                return -EOPNOTSUPP;

        return 0;
}

static int mlx5e_rep_ndo_setup_tc(struct net_device *dev, u32 handle,
                                  __be16 proto, struct tc_to_netdev *tc)
{
        struct mlx5e_priv *priv = netdev_priv(dev);

        if (TC_H_MAJ(handle) != TC_H_MAJ(TC_H_INGRESS))
                return -EOPNOTSUPP;

        if (tc->egress_dev) {
                struct mlx5_eswitch *esw = priv->mdev->priv.eswitch;
                struct net_device *uplink_dev = mlx5_eswitch_get_uplink_netdev(esw);

                return uplink_dev->netdev_ops->ndo_setup_tc(uplink_dev, handle,
                                                            proto, tc);
        }

        switch (tc->type) {
        case TC_SETUP_CLSFLOWER:
                switch (tc->cls_flower->command) {
                case TC_CLSFLOWER_REPLACE:
                        return mlx5e_configure_flower(priv, proto, tc->cls_flower);
                case TC_CLSFLOWER_DESTROY:
                        return mlx5e_delete_flower(priv, tc->cls_flower);
                case TC_CLSFLOWER_STATS:
                        return mlx5e_stats_flower(priv, tc->cls_flower);
                }
        default:
                return -EOPNOTSUPP;
        }
}

bool mlx5e_is_uplink_rep(struct mlx5e_priv *priv)
{
        struct mlx5_eswitch_rep *rep = (struct mlx5_eswitch_rep *)priv->ppriv;
        struct mlx5_eswitch *esw = priv->mdev->priv.eswitch;

        if (rep && rep->vport == FDB_UPLINK_VPORT && esw->mode == SRIOV_OFFLOADS)
                return true;

        return false;
}

bool mlx5e_is_vf_vport_rep(struct mlx5e_priv *priv)
{
        struct mlx5_eswitch_rep *rep = (struct mlx5_eswitch_rep *)priv->ppriv;

        if (rep && rep->vport != FDB_UPLINK_VPORT)
                return true;

        return false;
}

bool mlx5e_has_offload_stats(const struct net_device *dev, int attr_id)
{
        struct mlx5e_priv *priv = netdev_priv(dev);

        switch (attr_id) {
        case IFLA_OFFLOAD_XSTATS_CPU_HIT:
                if (mlx5e_is_vf_vport_rep(priv) || mlx5e_is_uplink_rep(priv))
                        return true;
        }

        return false;
}

static int
mlx5e_get_sw_stats64(const struct net_device *dev,
                     struct rtnl_link_stats64 *stats)
{
        struct mlx5e_priv *priv = netdev_priv(dev);
        struct mlx5e_sw_stats *sstats = &priv->stats.sw;

        stats->rx_packets = sstats->rx_packets;
        stats->rx_bytes   = sstats->rx_bytes;
        stats->tx_packets = sstats->tx_packets;
        stats->tx_bytes   = sstats->tx_bytes;

        stats->tx_dropped = sstats->tx_queue_dropped;

        return 0;
}

int mlx5e_get_offload_stats(int attr_id, const struct net_device *dev,
                            void *sp)
{
        switch (attr_id) {
        case IFLA_OFFLOAD_XSTATS_CPU_HIT:
                return mlx5e_get_sw_stats64(dev, sp);
        }

        return -EINVAL;
}

static void
mlx5e_rep_get_stats(struct net_device *dev, struct rtnl_link_stats64 *stats)
{
        struct mlx5e_priv *priv = netdev_priv(dev);

        memcpy(stats, &priv->stats.vf_vport, sizeof(*stats));
}

static const struct switchdev_ops mlx5e_rep_switchdev_ops = {
        .switchdev_port_attr_get        = mlx5e_attr_get,
};

static const struct net_device_ops mlx5e_netdev_ops_rep = {
        .ndo_open                = mlx5e_rep_open,
        .ndo_stop                = mlx5e_rep_close,
        .ndo_start_xmit          = mlx5e_xmit,
        .ndo_get_phys_port_name  = mlx5e_rep_get_phys_port_name,
        .ndo_setup_tc            = mlx5e_rep_ndo_setup_tc,
        .ndo_get_stats64         = mlx5e_rep_get_stats,
        .ndo_has_offload_stats   = mlx5e_has_offload_stats,
        .ndo_get_offload_stats   = mlx5e_get_offload_stats,
};

static void mlx5e_build_rep_params(struct mlx5_core_dev *mdev,
                                   struct mlx5e_params *params)
{
        u8 cq_period_mode = MLX5_CAP_GEN(mdev, cq_period_start_from_cqe) ?
                                         MLX5_CQ_PERIOD_MODE_START_FROM_CQE :
                                         MLX5_CQ_PERIOD_MODE_START_FROM_EQE;

        params->log_sq_size = MLX5E_PARAMS_MINIMUM_LOG_SQ_SIZE;
        params->rq_wq_type  = MLX5_WQ_TYPE_LINKED_LIST;
        params->log_rq_size = MLX5E_PARAMS_MINIMUM_LOG_RQ_SIZE;

        params->rx_am_enabled = MLX5_CAP_GEN(mdev, cq_moderation);
        mlx5e_set_rx_cq_mode_params(params, cq_period_mode);

        params->tx_max_inline         = mlx5e_get_max_inline_cap(mdev);
        params->num_tc                = 1;
        params->lro_wqe_sz            = MLX5E_PARAMS_DEFAULT_LRO_WQE_SZ;
}

static void mlx5e_build_rep_netdev(struct net_device *netdev)
{
        netdev->netdev_ops = &mlx5e_netdev_ops_rep;

        netdev->watchdog_timeo    = 15 * HZ;

        netdev->ethtool_ops       = &mlx5e_rep_ethtool_ops;

#ifdef CONFIG_NET_SWITCHDEV
        netdev->switchdev_ops = &mlx5e_rep_switchdev_ops;
#endif

        netdev->features         |= NETIF_F_VLAN_CHALLENGED | NETIF_F_HW_TC | NETIF_F_NETNS_LOCAL;
        netdev->hw_features      |= NETIF_F_HW_TC;

        eth_hw_addr_random(netdev);
}

static void mlx5e_init_rep(struct mlx5_core_dev *mdev,
                           struct net_device *netdev,
                           const struct mlx5e_profile *profile,
                           void *ppriv)
{
        struct mlx5e_priv *priv = netdev_priv(netdev);

        priv->mdev                         = mdev;
        priv->netdev                       = netdev;
        priv->profile                      = profile;
        priv->ppriv                        = ppriv;

        mutex_init(&priv->state_lock);

        INIT_DELAYED_WORK(&priv->update_stats_work, mlx5e_update_stats_work);

        priv->channels.params.num_channels = profile->max_nch(mdev);
        mlx5e_build_rep_params(mdev, &priv->channels.params);
        mlx5e_build_rep_netdev(netdev);
}

static int mlx5e_init_rep_rx(struct mlx5e_priv *priv)
{
        struct mlx5_eswitch *esw = priv->mdev->priv.eswitch;
        struct mlx5_eswitch_rep *rep = priv->ppriv;
        struct mlx5_core_dev *mdev = priv->mdev;
        struct mlx5_flow_handle *flow_rule;
        int err;
        int i;

        err = mlx5e_create_direct_rqts(priv);
        if (err) {
                mlx5_core_warn(mdev, "create direct rqts failed, %d\n", err);
                return err;
        }

        err = mlx5e_create_direct_tirs(priv);
        if (err) {
                mlx5_core_warn(mdev, "create direct tirs failed, %d\n", err);
                goto err_destroy_direct_rqts;
        }

        flow_rule = mlx5_eswitch_create_vport_rx_rule(esw,
                                                      rep->vport,
                                                      priv->direct_tir[0].tirn);
        if (IS_ERR(flow_rule)) {
                err = PTR_ERR(flow_rule);
                goto err_destroy_direct_tirs;
        }
        rep->vport_rx_rule = flow_rule;

        err = mlx5e_tc_init(priv);
        if (err)
                goto err_del_flow_rule;

        return 0;

err_del_flow_rule:
        mlx5_del_flow_rules(rep->vport_rx_rule);
err_destroy_direct_tirs:
        mlx5e_destroy_direct_tirs(priv);
err_destroy_direct_rqts:
        for (i = 0; i < priv->channels.params.num_channels; i++)
                mlx5e_destroy_rqt(priv, &priv->direct_tir[i].rqt);
        return err;
}

static void mlx5e_cleanup_rep_rx(struct mlx5e_priv *priv)
{
        struct mlx5_eswitch_rep *rep = priv->ppriv;
        int i;

        mlx5e_tc_cleanup(priv);
        mlx5_del_flow_rules(rep->vport_rx_rule);
        mlx5e_destroy_direct_tirs(priv);
        for (i = 0; i < priv->channels.params.num_channels; i++)
                mlx5e_destroy_rqt(priv, &priv->direct_tir[i].rqt);
}

static int mlx5e_init_rep_tx(struct mlx5e_priv *priv)
{
        int err;

        err = mlx5e_create_tises(priv);
        if (err) {
                mlx5_core_warn(priv->mdev, "create tises failed, %d\n", err);
                return err;
        }
        return 0;
}

static int mlx5e_get_rep_max_num_channels(struct mlx5_core_dev *mdev)
{
#define MLX5E_PORT_REPRESENTOR_NCH 1
        return MLX5E_PORT_REPRESENTOR_NCH;
}

static struct mlx5e_profile mlx5e_rep_profile = {
        .init                   = mlx5e_init_rep,
        .init_rx                = mlx5e_init_rep_rx,
        .cleanup_rx             = mlx5e_cleanup_rep_rx,
        .init_tx                = mlx5e_init_rep_tx,
        .cleanup_tx             = mlx5e_cleanup_nic_tx,
        .update_stats           = mlx5e_rep_update_stats,
        .max_nch                = mlx5e_get_rep_max_num_channels,
        .max_tc                 = 1,
};

int mlx5e_vport_rep_load(struct mlx5_eswitch *esw,
                         struct mlx5_eswitch_rep *rep)
{
        struct net_device *netdev;
        int err;

        netdev = mlx5e_create_netdev(esw->dev, &mlx5e_rep_profile, rep);
        if (!netdev) {
                pr_warn("Failed to create representor netdev for vport %d\n",
                        rep->vport);
                return -EINVAL;
        }

        rep->netdev = netdev;

        err = mlx5e_attach_netdev(esw->dev, netdev);
        if (err) {
                pr_warn("Failed to attach representor netdev for vport %d\n",
                        rep->vport);
                goto err_destroy_netdev;
        }

        err = register_netdev(netdev);
        if (err) {
                pr_warn("Failed to register representor netdev for vport %d\n",
                        rep->vport);
                goto err_detach_netdev;
        }

        return 0;

err_detach_netdev:
        mlx5e_detach_netdev(esw->dev, netdev);

err_destroy_netdev:
        mlx5e_destroy_netdev(esw->dev, netdev_priv(netdev));

        return err;

}

void mlx5e_vport_rep_unload(struct mlx5_eswitch *esw,
                            struct mlx5_eswitch_rep *rep)
{
        struct net_device *netdev = rep->netdev;

        unregister_netdev(netdev);
        mlx5e_detach_netdev(esw->dev, netdev);
        mlx5e_destroy_netdev(esw->dev, netdev_priv(netdev));
}