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/*
* 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/mlx5/fs.h>
#include "en.h"
#include "ipoib.h"
/* IPoIB mlx5 netdev profile */
/* Called directly after IPoIB netdevice was created to initialize SW structs */
static void mlx5i_init(struct mlx5_core_dev *mdev,
struct net_device *netdev,
const struct mlx5e_profile *profile,
void *ppriv)
{
struct mlx5e_priv *priv = mlx5i_epriv(netdev);
priv->mdev = mdev;
priv->netdev = netdev;
priv->profile = profile;
priv->ppriv = ppriv;
mlx5e_build_nic_params(mdev, &priv->channels.params, profile->max_nch(mdev));
mutex_init(&priv->state_lock);
/* TODO : init netdev features here */
}
/* Called directly before IPoIB netdevice is destroyed to cleanup SW structs */
static void mlx5i_cleanup(struct mlx5e_priv *priv)
{
/* Do nothing .. */
}
static int mlx5i_init_tx(struct mlx5e_priv *priv)
{
/* TODO: Create IPoIB underlay QP */
/* TODO: create IPoIB TX HW TIS */
return 0;
}
static void mlx5i_cleanup_tx(struct mlx5e_priv *priv)
{
}
static int mlx5i_init_rx(struct mlx5e_priv *priv)
{
int err;
err = mlx5e_create_indirect_rqt(priv);
if (err)
return err;
err = mlx5e_create_direct_rqts(priv);
if (err)
goto err_destroy_indirect_rqts;
err = mlx5e_create_indirect_tirs(priv);
if (err)
goto err_destroy_direct_rqts;
err = mlx5e_create_direct_tirs(priv);
if (err)
goto err_destroy_indirect_tirs;
return 0;
err_destroy_indirect_tirs:
mlx5e_destroy_indirect_tirs(priv);
err_destroy_direct_rqts:
mlx5e_destroy_direct_rqts(priv);
err_destroy_indirect_rqts:
mlx5e_destroy_rqt(priv, &priv->indir_rqt);
return err;
}
static void mlx5i_cleanup_rx(struct mlx5e_priv *priv)
{
mlx5e_destroy_direct_tirs(priv);
mlx5e_destroy_indirect_tirs(priv);
mlx5e_destroy_direct_rqts(priv);
mlx5e_destroy_rqt(priv, &priv->indir_rqt);
}
static const struct mlx5e_profile mlx5i_nic_profile = {
.init = mlx5i_init,
.cleanup = mlx5i_cleanup,
.init_tx = mlx5i_init_tx,
.cleanup_tx = mlx5i_cleanup_tx,
.init_rx = mlx5i_init_rx,
.cleanup_rx = mlx5i_cleanup_rx,
.enable = NULL, /* mlx5i_enable */
.disable = NULL, /* mlx5i_disable */
.update_stats = NULL, /* mlx5i_update_stats */
.max_nch = mlx5e_get_max_num_channels,
.max_tc = MLX5I_MAX_NUM_TC,
};
/* IPoIB RDMA netdev callbacks */
static int mlx5i_check_required_hca_cap(struct mlx5_core_dev *mdev)
{
if (MLX5_CAP_GEN(mdev, port_type) != MLX5_CAP_PORT_TYPE_IB)
return -EOPNOTSUPP;
if (!MLX5_CAP_GEN(mdev, ipoib_enhanced_offloads)) {
mlx5_core_warn(mdev, "IPoIB enhanced offloads are not supported\n");
return -ENOTSUPP;
}
return 0;
}
struct net_device *mlx5_rdma_netdev_alloc(struct mlx5_core_dev *mdev,
struct ib_device *ibdev,
const char *name,
void (*setup)(struct net_device *))
{
const struct mlx5e_profile *profile = &mlx5i_nic_profile;
int nch = profile->max_nch(mdev);
struct net_device *netdev;
struct mlx5i_priv *ipriv;
struct mlx5e_priv *epriv;
int err;
if (mlx5i_check_required_hca_cap(mdev)) {
mlx5_core_warn(mdev, "Accelerated mode is not supported\n");
return ERR_PTR(-EOPNOTSUPP);
}
/* This function should only be called once per mdev */
err = mlx5e_create_mdev_resources(mdev);
if (err)
return NULL;
netdev = alloc_netdev_mqs(sizeof(struct mlx5i_priv) + sizeof(struct mlx5e_priv),
name, NET_NAME_UNKNOWN,
setup,
nch * MLX5E_MAX_NUM_TC,
nch);
if (!netdev) {
mlx5_core_warn(mdev, "alloc_netdev_mqs failed\n");
goto free_mdev_resources;
}
ipriv = netdev_priv(netdev);
epriv = mlx5i_epriv(netdev);
epriv->wq = create_singlethread_workqueue("mlx5i");
if (!epriv->wq)
goto err_free_netdev;
profile->init(mdev, netdev, profile, ipriv);
mlx5e_attach_netdev(epriv);
netif_carrier_off(netdev);
/* TODO: set rdma_netdev func pointers
* rn = &ipriv->rn;
* rn->hca = ibdev;
* rn->send = mlx5i_xmit;
* rn->attach_mcast = mlx5i_attach_mcast;
* rn->detach_mcast = mlx5i_detach_mcast;
*/
return netdev;
free_mdev_resources:
mlx5e_destroy_mdev_resources(mdev);
err_free_netdev:
free_netdev(netdev);
return NULL;
}
EXPORT_SYMBOL(mlx5_rdma_netdev_alloc);
void mlx5_rdma_netdev_free(struct net_device *netdev)
{
struct mlx5e_priv *priv = mlx5i_epriv(netdev);
const struct mlx5e_profile *profile = priv->profile;
mlx5e_detach_netdev(priv);
profile->cleanup(priv);
destroy_workqueue(priv->wq);
free_netdev(netdev);
mlx5e_destroy_mdev_resources(priv->mdev);
}
EXPORT_SYMBOL(mlx5_rdma_netdev_free);
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