blob: 18ee21b06a0015c40cd35cb1dfc07db78a373bed [file] [log] [blame]
/*
* Copyright (c) 2017, Mellanox Technologies. All rights reserved.
*
* This software is available to you under a choice of one of two
* licenses. You may choose to be licensed under the terms of the GNU
* General Public License (GPL) Version 2, available from the file
* COPYING in the main directory of this source tree, or the
* OpenIB.org BSD license below:
*
* Redistribution and use in source and binary forms, with or
* without modification, are permitted provided that the following
* conditions are met:
*
* - Redistributions of source code must retain the above
* copyright notice, this list of conditions and the following
* disclaimer.
*
* - Redistributions in binary form must reproduce the above
* copyright notice, this list of conditions and the following
* disclaimer in the documentation and/or other materials
* provided with the distribution.
*
* THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND,
* EXPRESS OR IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF
* MERCHANTABILITY, FITNESS FOR A PARTICULAR PURPOSE AND
* NONINFRINGEMENT. IN NO EVENT SHALL THE AUTHORS OR COPYRIGHT HOLDERS
* BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER LIABILITY, WHETHER IN AN
* ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM, OUT OF OR IN
* CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE
* SOFTWARE.
*/
#include <linux/hash.h>
#include "ipoib.h"
#define MLX5I_MAX_LOG_PKEY_SUP 7
struct qpn_to_netdev {
struct net_device *netdev;
struct hlist_node hlist;
u32 underlay_qpn;
};
struct mlx5i_pkey_qpn_ht {
struct hlist_head buckets[1 << MLX5I_MAX_LOG_PKEY_SUP];
spinlock_t ht_lock; /* Synchronise with NAPI */
};
int mlx5i_pkey_qpn_ht_init(struct net_device *netdev)
{
struct mlx5i_priv *ipriv = netdev_priv(netdev);
struct mlx5i_pkey_qpn_ht *qpn_htbl;
qpn_htbl = kzalloc(sizeof(*qpn_htbl), GFP_KERNEL);
if (!qpn_htbl)
return -ENOMEM;
ipriv->qpn_htbl = qpn_htbl;
spin_lock_init(&qpn_htbl->ht_lock);
return 0;
}
void mlx5i_pkey_qpn_ht_cleanup(struct net_device *netdev)
{
struct mlx5i_priv *ipriv = netdev_priv(netdev);
kfree(ipriv->qpn_htbl);
}
static struct qpn_to_netdev *mlx5i_find_qpn_to_netdev_node(struct hlist_head *buckets,
u32 qpn)
{
struct hlist_head *h = &buckets[hash_32(qpn, MLX5I_MAX_LOG_PKEY_SUP)];
struct qpn_to_netdev *node;
hlist_for_each_entry(node, h, hlist) {
if (node->underlay_qpn == qpn)
return node;
}
return NULL;
}
int mlx5i_pkey_add_qpn(struct net_device *netdev, u32 qpn)
{
struct mlx5i_priv *ipriv = netdev_priv(netdev);
struct mlx5i_pkey_qpn_ht *ht = ipriv->qpn_htbl;
u8 key = hash_32(qpn, MLX5I_MAX_LOG_PKEY_SUP);
struct qpn_to_netdev *new_node;
new_node = kzalloc(sizeof(*new_node), GFP_KERNEL);
if (!new_node)
return -ENOMEM;
new_node->netdev = netdev;
new_node->underlay_qpn = qpn;
spin_lock_bh(&ht->ht_lock);
hlist_add_head(&new_node->hlist, &ht->buckets[key]);
spin_unlock_bh(&ht->ht_lock);
return 0;
}
int mlx5i_pkey_del_qpn(struct net_device *netdev, u32 qpn)
{
struct mlx5e_priv *epriv = mlx5i_epriv(netdev);
struct mlx5i_priv *ipriv = epriv->ppriv;
struct mlx5i_pkey_qpn_ht *ht = ipriv->qpn_htbl;
struct qpn_to_netdev *node;
node = mlx5i_find_qpn_to_netdev_node(ht->buckets, qpn);
if (!node) {
mlx5_core_warn(epriv->mdev, "QPN to netdev delete from HT failed\n");
return -EINVAL;
}
spin_lock_bh(&ht->ht_lock);
hlist_del_init(&node->hlist);
spin_unlock_bh(&ht->ht_lock);
kfree(node);
return 0;
}
struct net_device *mlx5i_pkey_get_netdev(struct net_device *netdev, u32 qpn)
{
struct mlx5i_priv *ipriv = netdev_priv(netdev);
struct qpn_to_netdev *node;
node = mlx5i_find_qpn_to_netdev_node(ipriv->qpn_htbl->buckets, qpn);
if (!node)
return NULL;
return node->netdev;
}
static int mlx5i_pkey_open(struct net_device *netdev);
static int mlx5i_pkey_close(struct net_device *netdev);
static int mlx5i_pkey_dev_init(struct net_device *dev);
static void mlx5i_pkey_dev_cleanup(struct net_device *netdev);
static int mlx5i_pkey_change_mtu(struct net_device *netdev, int new_mtu);
static int mlx5i_pkey_ioctl(struct net_device *dev, struct ifreq *ifr, int cmd);
static const struct net_device_ops mlx5i_pkey_netdev_ops = {
.ndo_open = mlx5i_pkey_open,
.ndo_stop = mlx5i_pkey_close,
.ndo_init = mlx5i_pkey_dev_init,
.ndo_get_stats64 = mlx5i_get_stats,
.ndo_uninit = mlx5i_pkey_dev_cleanup,
.ndo_change_mtu = mlx5i_pkey_change_mtu,
.ndo_do_ioctl = mlx5i_pkey_ioctl,
};
/* Child NDOs */
static int mlx5i_pkey_dev_init(struct net_device *dev)
{
struct mlx5e_priv *priv = mlx5i_epriv(dev);
struct mlx5i_priv *ipriv, *parent_ipriv;
struct net_device *parent_dev;
int parent_ifindex;
ipriv = priv->ppriv;
/* Get QPN to netdevice hash table from parent */
parent_ifindex = dev->netdev_ops->ndo_get_iflink(dev);
parent_dev = dev_get_by_index(dev_net(dev), parent_ifindex);
if (!parent_dev) {
mlx5_core_warn(priv->mdev, "failed to get parent device\n");
return -EINVAL;
}
parent_ipriv = netdev_priv(parent_dev);
ipriv->qpn_htbl = parent_ipriv->qpn_htbl;
dev_put(parent_dev);
return mlx5i_dev_init(dev);
}
static int mlx5i_pkey_ioctl(struct net_device *dev, struct ifreq *ifr, int cmd)
{
return mlx5i_ioctl(dev, ifr, cmd);
}
static void mlx5i_pkey_dev_cleanup(struct net_device *netdev)
{
return mlx5i_dev_cleanup(netdev);
}
static int mlx5i_pkey_open(struct net_device *netdev)
{
struct mlx5e_priv *epriv = mlx5i_epriv(netdev);
struct mlx5i_priv *ipriv = epriv->ppriv;
struct mlx5_core_dev *mdev = epriv->mdev;
int err;
mutex_lock(&epriv->state_lock);
set_bit(MLX5E_STATE_OPENED, &epriv->state);
err = mlx5i_init_underlay_qp(epriv);
if (err) {
mlx5_core_warn(mdev, "prepare child underlay qp state failed, %d\n", err);
goto err_release_lock;
}
err = mlx5_fs_add_rx_underlay_qpn(mdev, ipriv->qpn);
if (err) {
mlx5_core_warn(mdev, "attach child underlay qp to ft failed, %d\n", err);
goto err_unint_underlay_qp;
}
err = mlx5i_create_tis(mdev, ipriv->qpn, &epriv->tisn[0][0]);
if (err) {
mlx5_core_warn(mdev, "create child tis failed, %d\n", err);
goto err_remove_rx_uderlay_qp;
}
err = mlx5e_open_channels(epriv, &epriv->channels);
if (err) {
mlx5_core_warn(mdev, "opening child channels failed, %d\n", err);
goto err_clear_state_opened_flag;
}
epriv->profile->update_rx(epriv);
mlx5e_activate_priv_channels(epriv);
mutex_unlock(&epriv->state_lock);
return 0;
err_clear_state_opened_flag:
mlx5e_destroy_tis(mdev, epriv->tisn[0][0]);
err_remove_rx_uderlay_qp:
mlx5_fs_remove_rx_underlay_qpn(mdev, ipriv->qpn);
err_unint_underlay_qp:
mlx5i_uninit_underlay_qp(epriv);
err_release_lock:
clear_bit(MLX5E_STATE_OPENED, &epriv->state);
mutex_unlock(&epriv->state_lock);
return err;
}
static int mlx5i_pkey_close(struct net_device *netdev)
{
struct mlx5e_priv *priv = mlx5i_epriv(netdev);
struct mlx5i_priv *ipriv = priv->ppriv;
struct mlx5_core_dev *mdev = priv->mdev;
mutex_lock(&priv->state_lock);
if (!test_bit(MLX5E_STATE_OPENED, &priv->state))
goto unlock;
clear_bit(MLX5E_STATE_OPENED, &priv->state);
netif_carrier_off(priv->netdev);
mlx5_fs_remove_rx_underlay_qpn(mdev, ipriv->qpn);
mlx5i_uninit_underlay_qp(priv);
mlx5e_deactivate_priv_channels(priv);
mlx5e_close_channels(&priv->channels);
mlx5e_destroy_tis(mdev, priv->tisn[0][0]);
unlock:
mutex_unlock(&priv->state_lock);
return 0;
}
static int mlx5i_pkey_change_mtu(struct net_device *netdev, int new_mtu)
{
struct mlx5e_priv *priv = mlx5i_epriv(netdev);
mutex_lock(&priv->state_lock);
netdev->mtu = new_mtu;
mutex_unlock(&priv->state_lock);
return 0;
}
/* Called directly after IPoIB netdevice was created to initialize SW structs */
static int mlx5i_pkey_init(struct mlx5_core_dev *mdev,
struct net_device *netdev)
{
struct mlx5e_priv *priv = mlx5i_epriv(netdev);
int err;
err = mlx5i_init(mdev, netdev);
if (err)
return err;
/* Override parent ndo */
netdev->netdev_ops = &mlx5i_pkey_netdev_ops;
/* Set child limited ethtool support */
netdev->ethtool_ops = &mlx5i_pkey_ethtool_ops;
/* Use dummy rqs */
priv->channels.params.log_rq_mtu_frames = MLX5E_PARAMS_MINIMUM_LOG_RQ_SIZE;
return 0;
}
/* Called directly before IPoIB netdevice is destroyed to cleanup SW structs */
static void mlx5i_pkey_cleanup(struct mlx5e_priv *priv)
{
mlx5i_cleanup(priv);
}
static int mlx5i_pkey_init_tx(struct mlx5e_priv *priv)
{
int err;
err = mlx5i_create_underlay_qp(priv);
if (err)
mlx5_core_warn(priv->mdev, "create child underlay QP failed, %d\n", err);
return err;
}
static void mlx5i_pkey_cleanup_tx(struct mlx5e_priv *priv)
{
struct mlx5i_priv *ipriv = priv->ppriv;
mlx5i_destroy_underlay_qp(priv->mdev, ipriv->qpn);
}
static int mlx5i_pkey_init_rx(struct mlx5e_priv *priv)
{
/* Since the rx resources are shared between child and parent, the
* parent interface is taking care of rx resource allocation and init
*/
return 0;
}
static void mlx5i_pkey_cleanup_rx(struct mlx5e_priv *priv)
{
/* Since the rx resources are shared between child and parent, the
* parent interface is taking care of rx resource free and de-init
*/
}
static const struct mlx5e_profile mlx5i_pkey_nic_profile = {
.init = mlx5i_pkey_init,
.cleanup = mlx5i_pkey_cleanup,
.init_tx = mlx5i_pkey_init_tx,
.cleanup_tx = mlx5i_pkey_cleanup_tx,
.init_rx = mlx5i_pkey_init_rx,
.cleanup_rx = mlx5i_pkey_cleanup_rx,
.enable = NULL,
.disable = NULL,
.update_rx = mlx5i_update_nic_rx,
.update_stats = NULL,
.rx_handlers = &mlx5i_rx_handlers,
.max_tc = MLX5I_MAX_NUM_TC,
.rq_groups = MLX5E_NUM_RQ_GROUPS(REGULAR),
.rx_ptp_support = false,
};
const struct mlx5e_profile *mlx5i_pkey_get_profile(void)
{
return &mlx5i_pkey_nic_profile;
}