mirror of https://gitee.com/openkylin/linux.git
144 lines
3.9 KiB
C
144 lines
3.9 KiB
C
/*
|
|
* Handling of a master device, switching frames via its switch fabric CPU port
|
|
*
|
|
* Copyright (c) 2017 Savoir-faire Linux Inc.
|
|
* Vivien Didelot <vivien.didelot@savoirfairelinux.com>
|
|
*
|
|
* This program is free software; you can redistribute it and/or modify
|
|
* it under the terms of the GNU General Public License as published by
|
|
* the Free Software Foundation; either version 2 of the License, or
|
|
* (at your option) any later version.
|
|
*/
|
|
|
|
#include "dsa_priv.h"
|
|
|
|
static void dsa_master_get_ethtool_stats(struct net_device *dev,
|
|
struct ethtool_stats *stats,
|
|
uint64_t *data)
|
|
{
|
|
struct dsa_port *cpu_dp = dev->dsa_ptr;
|
|
const struct ethtool_ops *ops = cpu_dp->orig_ethtool_ops;
|
|
struct dsa_switch *ds = cpu_dp->ds;
|
|
int port = cpu_dp->index;
|
|
int count = 0;
|
|
|
|
if (ops && ops->get_sset_count && ops->get_ethtool_stats) {
|
|
count = ops->get_sset_count(dev, ETH_SS_STATS);
|
|
ops->get_ethtool_stats(dev, stats, data);
|
|
}
|
|
|
|
if (ds->ops->get_ethtool_stats)
|
|
ds->ops->get_ethtool_stats(ds, port, data + count);
|
|
}
|
|
|
|
static int dsa_master_get_sset_count(struct net_device *dev, int sset)
|
|
{
|
|
struct dsa_port *cpu_dp = dev->dsa_ptr;
|
|
const struct ethtool_ops *ops = cpu_dp->orig_ethtool_ops;
|
|
struct dsa_switch *ds = cpu_dp->ds;
|
|
int count = 0;
|
|
|
|
if (ops && ops->get_sset_count)
|
|
count += ops->get_sset_count(dev, sset);
|
|
|
|
if (sset == ETH_SS_STATS && ds->ops->get_sset_count)
|
|
count += ds->ops->get_sset_count(ds);
|
|
|
|
return count;
|
|
}
|
|
|
|
static void dsa_master_get_strings(struct net_device *dev, uint32_t stringset,
|
|
uint8_t *data)
|
|
{
|
|
struct dsa_port *cpu_dp = dev->dsa_ptr;
|
|
const struct ethtool_ops *ops = cpu_dp->orig_ethtool_ops;
|
|
struct dsa_switch *ds = cpu_dp->ds;
|
|
int port = cpu_dp->index;
|
|
int len = ETH_GSTRING_LEN;
|
|
int mcount = 0, count;
|
|
unsigned int i;
|
|
uint8_t pfx[4];
|
|
uint8_t *ndata;
|
|
|
|
snprintf(pfx, sizeof(pfx), "p%.2d", port);
|
|
/* We do not want to be NULL-terminated, since this is a prefix */
|
|
pfx[sizeof(pfx) - 1] = '_';
|
|
|
|
if (ops && ops->get_sset_count && ops->get_strings) {
|
|
mcount = ops->get_sset_count(dev, ETH_SS_STATS);
|
|
ops->get_strings(dev, stringset, data);
|
|
}
|
|
|
|
if (stringset == ETH_SS_STATS && ds->ops->get_strings) {
|
|
ndata = data + mcount * len;
|
|
/* This function copies ETH_GSTRINGS_LEN bytes, we will mangle
|
|
* the output after to prepend our CPU port prefix we
|
|
* constructed earlier
|
|
*/
|
|
ds->ops->get_strings(ds, port, ndata);
|
|
count = ds->ops->get_sset_count(ds);
|
|
for (i = 0; i < count; i++) {
|
|
memmove(ndata + (i * len + sizeof(pfx)),
|
|
ndata + i * len, len - sizeof(pfx));
|
|
memcpy(ndata + i * len, pfx, sizeof(pfx));
|
|
}
|
|
}
|
|
}
|
|
|
|
static int dsa_master_ethtool_setup(struct net_device *dev)
|
|
{
|
|
struct dsa_port *cpu_dp = dev->dsa_ptr;
|
|
struct dsa_switch *ds = cpu_dp->ds;
|
|
struct ethtool_ops *ops;
|
|
|
|
ops = devm_kzalloc(ds->dev, sizeof(*ops), GFP_KERNEL);
|
|
if (!ops)
|
|
return -ENOMEM;
|
|
|
|
cpu_dp->orig_ethtool_ops = dev->ethtool_ops;
|
|
if (cpu_dp->orig_ethtool_ops)
|
|
memcpy(ops, cpu_dp->orig_ethtool_ops, sizeof(*ops));
|
|
|
|
ops->get_sset_count = dsa_master_get_sset_count;
|
|
ops->get_ethtool_stats = dsa_master_get_ethtool_stats;
|
|
ops->get_strings = dsa_master_get_strings;
|
|
|
|
dev->ethtool_ops = ops;
|
|
|
|
return 0;
|
|
}
|
|
|
|
static void dsa_master_ethtool_teardown(struct net_device *dev)
|
|
{
|
|
struct dsa_port *cpu_dp = dev->dsa_ptr;
|
|
|
|
dev->ethtool_ops = cpu_dp->orig_ethtool_ops;
|
|
cpu_dp->orig_ethtool_ops = NULL;
|
|
}
|
|
|
|
int dsa_master_setup(struct net_device *dev, struct dsa_port *cpu_dp)
|
|
{
|
|
/* If we use a tagging format that doesn't have an ethertype
|
|
* field, make sure that all packets from this point on get
|
|
* sent to the tag format's receive function.
|
|
*/
|
|
wmb();
|
|
|
|
dev->dsa_ptr = cpu_dp;
|
|
|
|
return dsa_master_ethtool_setup(dev);
|
|
}
|
|
|
|
void dsa_master_teardown(struct net_device *dev)
|
|
{
|
|
dsa_master_ethtool_teardown(dev);
|
|
|
|
dev->dsa_ptr = NULL;
|
|
|
|
/* If we used a tagging format that doesn't have an ethertype
|
|
* field, make sure that all packets from this point get sent
|
|
* without the tag and go through the regular receive path.
|
|
*/
|
|
wmb();
|
|
}
|