forked from Minki/linux
3eb47dfca0
Representors are grouped in sets by type. Currently the whole sets are under RCU protection, but individual representor pointers are not. This causes some inconveniences when representors have to be destroyed, because we have to allocate new sets to remove any representors. Protect the individual pointers with RCU. Signed-off-by: Jakub Kicinski <jakub.kicinski@netronome.com> Reviewed-by: Dirk van der Merwe <dirk.vandermerwe@netronome.com> Signed-off-by: David S. Miller <davem@davemloft.net>
134 lines
4.0 KiB
C
134 lines
4.0 KiB
C
/*
|
|
* 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.
|
|
*/
|
|
|
|
#ifndef NFP_NET_REPR_H
|
|
#define NFP_NET_REPR_H
|
|
|
|
struct metadata_dst;
|
|
struct nfp_app;
|
|
struct nfp_net;
|
|
struct nfp_port;
|
|
|
|
#include <net/dst_metadata.h>
|
|
|
|
/**
|
|
* struct nfp_reprs - container for representor netdevs
|
|
* @num_reprs: Number of elements in reprs array
|
|
* @reprs: Array of representor netdevs
|
|
*/
|
|
struct nfp_reprs {
|
|
unsigned int num_reprs;
|
|
struct net_device __rcu *reprs[0];
|
|
};
|
|
|
|
/**
|
|
* struct nfp_repr_pcpu_stats
|
|
* @rx_packets: Received packets
|
|
* @rx_bytes: Received bytes
|
|
* @tx_packets: Transmitted packets
|
|
* @tx_bytes: Transmitted dropped
|
|
* @tx_drops: Packets dropped on transmit
|
|
* @syncp: Reference count
|
|
*/
|
|
struct nfp_repr_pcpu_stats {
|
|
u64 rx_packets;
|
|
u64 rx_bytes;
|
|
u64 tx_packets;
|
|
u64 tx_bytes;
|
|
u64 tx_drops;
|
|
struct u64_stats_sync syncp;
|
|
};
|
|
|
|
/**
|
|
* struct nfp_repr - priv data for representor netdevs
|
|
* @netdev: Back pointer to netdev
|
|
* @dst: Destination for packet TX
|
|
* @port: Port of representor
|
|
* @app: APP handle
|
|
* @stats: Statistic of packets hitting CPU
|
|
*/
|
|
struct nfp_repr {
|
|
struct net_device *netdev;
|
|
struct metadata_dst *dst;
|
|
struct nfp_port *port;
|
|
struct nfp_app *app;
|
|
struct nfp_repr_pcpu_stats __percpu *stats;
|
|
};
|
|
|
|
/**
|
|
* enum nfp_repr_type - type of representor
|
|
* @NFP_REPR_TYPE_PHYS_PORT: external NIC port
|
|
* @NFP_REPR_TYPE_PF: physical function
|
|
* @NFP_REPR_TYPE_VF: virtual function
|
|
* @__NFP_REPR_TYPE_MAX: number of representor types
|
|
*/
|
|
enum nfp_repr_type {
|
|
NFP_REPR_TYPE_PHYS_PORT,
|
|
NFP_REPR_TYPE_PF,
|
|
NFP_REPR_TYPE_VF,
|
|
|
|
__NFP_REPR_TYPE_MAX,
|
|
};
|
|
#define NFP_REPR_TYPE_MAX (__NFP_REPR_TYPE_MAX - 1)
|
|
|
|
extern const struct net_device_ops nfp_repr_netdev_ops;
|
|
|
|
static inline bool nfp_netdev_is_nfp_repr(struct net_device *netdev)
|
|
{
|
|
return netdev->netdev_ops == &nfp_repr_netdev_ops;
|
|
}
|
|
|
|
static inline int nfp_repr_get_port_id(struct net_device *netdev)
|
|
{
|
|
struct nfp_repr *priv = netdev_priv(netdev);
|
|
|
|
return priv->dst->u.port_info.port_id;
|
|
}
|
|
|
|
struct net_device *
|
|
nfp_repr_get_locked(struct nfp_app *app, struct nfp_reprs *set,
|
|
unsigned int id);
|
|
|
|
void nfp_repr_inc_rx_stats(struct net_device *netdev, unsigned int len);
|
|
int nfp_repr_init(struct nfp_app *app, struct net_device *netdev,
|
|
u32 cmsg_port_id, struct nfp_port *port,
|
|
struct net_device *pf_netdev);
|
|
struct net_device *nfp_repr_alloc(struct nfp_app *app);
|
|
void nfp_reprs_clean_and_free(struct nfp_app *app, struct nfp_reprs *reprs);
|
|
void nfp_reprs_clean_and_free_by_type(struct nfp_app *app,
|
|
enum nfp_repr_type type);
|
|
struct nfp_reprs *nfp_reprs_alloc(unsigned int num_reprs);
|
|
int nfp_reprs_resync_phys_ports(struct nfp_app *app);
|
|
|
|
#endif /* NFP_NET_REPR_H */
|