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/*
* Copyright (C) 2017 Netronome Systems, Inc.
*
* This software is dual licensed under the GNU General License Version 2,
* June 1991 as shown in the file COPYING in the top-level directory of this
* source tree or the BSD 2-Clause License provided below. You have the
* option to license this software under the complete terms of either license.
*
* The BSD 2-Clause License:
*
* Redistribution and use in source and binary forms, with or
* without modification, are permitted provided that the following
* conditions are met:
*
* 1. Redistributions of source code must retain the above
* copyright notice, this list of conditions and the following
* disclaimer.
*
* 2. 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/rtnetlink.h>
#include <net/devlink.h>
#include "nfpcore/nfp_nsp.h"
#include "nfp_app.h"
#include "nfp_main.h"
#include "nfp_port.h"
static int
nfp_devlink_fill_eth_port(struct nfp_port *port,
struct nfp_eth_table_port *copy)
{
struct nfp_eth_table_port *eth_port;
eth_port = __nfp_port_get_eth_port(port);
if (!eth_port)
return -EINVAL;
memcpy(copy, eth_port, sizeof(*eth_port));
return 0;
}
static int
nfp_devlink_fill_eth_port_from_id(struct nfp_pf *pf, unsigned int port_index,
struct nfp_eth_table_port *copy)
{
struct nfp_port *port;
port = nfp_port_from_id(pf, NFP_PORT_PHYS_PORT, port_index);
return nfp_devlink_fill_eth_port(port, copy);
}
static int
nfp_devlink_set_lanes(struct nfp_pf *pf, unsigned int idx, unsigned int lanes)
{
struct nfp_nsp *nsp;
int ret;
nsp = nfp_eth_config_start(pf->cpp, idx);
if (IS_ERR(nsp))
return PTR_ERR(nsp);
ret = __nfp_eth_set_split(nsp, lanes);
if (ret) {
nfp_eth_config_cleanup_end(nsp);
return ret;
}
ret = nfp_eth_config_commit_end(nsp);
if (ret < 0)
return ret;
if (ret) /* no change */
return 0;
return nfp_net_refresh_port_table_sync(pf);
}
static int
nfp_devlink_port_split(struct devlink *devlink, unsigned int port_index,
unsigned int count)
{
struct nfp_pf *pf = devlink_priv(devlink);
struct nfp_eth_table_port eth_port;
int ret;
if (count < 2)
return -EINVAL;
mutex_lock(&pf->lock);
rtnl_lock();
ret = nfp_devlink_fill_eth_port_from_id(pf, port_index, ð_port);
rtnl_unlock();
if (ret)
goto out;
if (eth_port.is_split || eth_port.port_lanes % count) {
ret = -EINVAL;
goto out;
}
ret = nfp_devlink_set_lanes(pf, eth_port.index,
eth_port.port_lanes / count);
out:
mutex_unlock(&pf->lock);
return ret;
}
static int
nfp_devlink_port_unsplit(struct devlink *devlink, unsigned int port_index)
{
struct nfp_pf *pf = devlink_priv(devlink);
struct nfp_eth_table_port eth_port;
int ret;
mutex_lock(&pf->lock);
rtnl_lock();
ret = nfp_devlink_fill_eth_port_from_id(pf, port_index, ð_port);
rtnl_unlock();
if (ret)
goto out;
if (!eth_port.is_split) {
ret = -EINVAL;
goto out;
}
ret = nfp_devlink_set_lanes(pf, eth_port.index, eth_port.port_lanes);
out:
mutex_unlock(&pf->lock);
return ret;
}
static int nfp_devlink_eswitch_mode_get(struct devlink *devlink, u16 *mode)
{
struct nfp_pf *pf = devlink_priv(devlink);
int ret;
mutex_lock(&pf->lock);
if (!pf->app) {
ret = -EBUSY;
goto out;
}
ret = nfp_app_eswitch_mode_get(pf->app, mode);
out:
mutex_unlock(&pf->lock);
return ret;
}
const struct devlink_ops nfp_devlink_ops = {
.port_split = nfp_devlink_port_split,
.port_unsplit = nfp_devlink_port_unsplit,
.eswitch_mode_get = nfp_devlink_eswitch_mode_get,
};
int nfp_devlink_port_register(struct nfp_app *app, struct nfp_port *port)
{
struct nfp_eth_table_port eth_port;
struct devlink *devlink;
int ret;
rtnl_lock();
ret = nfp_devlink_fill_eth_port(port, ð_port);
rtnl_unlock();
if (ret)
return ret;
devlink_port_type_eth_set(&port->dl_port, port->netdev);
if (eth_port.is_split)
devlink_port_split_set(&port->dl_port, eth_port.label_port);
devlink = priv_to_devlink(app->pf);
return devlink_port_register(devlink, &port->dl_port, port->eth_id);
}
void nfp_devlink_port_unregister(struct nfp_port *port)
{
devlink_port_unregister(&port->dl_port);
}
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