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net: stmmac: add ethtool support for get/set channels

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Restructure NAPI add and delete process so that we can call them
accordingly in open() and ethtool_set_channels() accordingly.

Introduced stmmac_reinit_queues() to handle the transition needed
for changing Rx & Tx channels accordingly.

Signed-off-by: Ong Boon Leong <boon.leong.ong@intel.com>
Signed-off-by: David S. Miller <davem@davemloft.net>
This commit is contained in:
Ong Boon Leong 2020-09-15 09:28:38 +08:00 committed by David S. Miller
parent 945c570488
commit 0366f7e06a
3 changed files with 93 additions and 28 deletions
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1
drivers/net/ethernet/stmicro/stmmac/stmmac.h
View File

@ -264,6 +264,7 @@ int stmmac_dvr_probe(struct device *device,
struct stmmac_resources *res);
void stmmac_disable_eee_mode(struct stmmac_priv *priv);
bool stmmac_eee_init(struct stmmac_priv *priv);
int stmmac_reinit_queues(struct net_device *dev, u32 rx_cnt, u32 tx_cnt);
#if IS_ENABLED(CONFIG_STMMAC_SELFTESTS)
void stmmac_selftest_run(struct net_device *dev,

26
drivers/net/ethernet/stmicro/stmmac/stmmac_ethtool.c
View File

@ -840,6 +840,30 @@ static int stmmac_set_rxfh(struct net_device *dev, const u32 *indir,
priv->plat->rx_queues_to_use);
}
static void stmmac_get_channels(struct net_device *dev,
struct ethtool_channels *chan)
{
struct stmmac_priv *priv = netdev_priv(dev);
chan->rx_count = priv->plat->rx_queues_to_use;
chan->tx_count = priv->plat->tx_queues_to_use;
chan->max_rx = priv->dma_cap.number_rx_queues;
chan->max_tx = priv->dma_cap.number_tx_queues;
}
static int stmmac_set_channels(struct net_device *dev,
struct ethtool_channels *chan)
{
struct stmmac_priv *priv = netdev_priv(dev);
if (chan->rx_count > priv->dma_cap.number_rx_queues ||
chan->tx_count > priv->dma_cap.number_tx_queues ||
!chan->rx_count || !chan->tx_count)
return -EINVAL;
return stmmac_reinit_queues(dev, chan->rx_count, chan->tx_count);
}
static int stmmac_get_ts_info(struct net_device *dev,
struct ethtool_ts_info *info)
{
@ -941,6 +965,8 @@ static const struct ethtool_ops stmmac_ethtool_ops = {
.get_ts_info = stmmac_get_ts_info,
.get_coalesce = stmmac_get_coalesce,
.set_coalesce = stmmac_set_coalesce,
.get_channels = stmmac_get_channels,
.set_channels = stmmac_set_channels,
.get_tunable = stmmac_get_tunable,
.set_tunable = stmmac_set_tunable,
.get_link_ksettings = stmmac_ethtool_get_link_ksettings,

94
drivers/net/ethernet/stmicro/stmmac/stmmac_main.c
View File

@ -4739,6 +4739,69 @@ static int stmmac_hw_init(struct stmmac_priv *priv)
return 0;
}
static void stmmac_napi_add(struct net_device *dev)
{
struct stmmac_priv *priv = netdev_priv(dev);
u32 queue, maxq;
maxq = max(priv->plat->rx_queues_to_use, priv->plat->tx_queues_to_use);
for (queue = 0; queue < maxq; queue++) {
struct stmmac_channel *ch = &priv->channel[queue];
ch->priv_data = priv;
ch->index = queue;
if (queue < priv->plat->rx_queues_to_use) {
netif_napi_add(dev, &ch->rx_napi, stmmac_napi_poll_rx,
NAPI_POLL_WEIGHT);
}
if (queue < priv->plat->tx_queues_to_use) {
netif_tx_napi_add(dev, &ch->tx_napi,
stmmac_napi_poll_tx,
NAPI_POLL_WEIGHT);
}
}
}
static void stmmac_napi_del(struct net_device *dev)
{
struct stmmac_priv *priv = netdev_priv(dev);
u32 queue, maxq;
maxq = max(priv->plat->rx_queues_to_use, priv->plat->tx_queues_to_use);
for (queue = 0; queue < maxq; queue++) {
struct stmmac_channel *ch = &priv->channel[queue];
if (queue < priv->plat->rx_queues_to_use)
netif_napi_del(&ch->rx_napi);
if (queue < priv->plat->tx_queues_to_use)
netif_napi_del(&ch->tx_napi);
}
}
int stmmac_reinit_queues(struct net_device *dev, u32 rx_cnt, u32 tx_cnt)
{
struct stmmac_priv *priv = netdev_priv(dev);
int ret = 0;
if (netif_running(dev))
stmmac_release(dev);
stmmac_napi_del(dev);
priv->plat->rx_queues_to_use = rx_cnt;
priv->plat->tx_queues_to_use = tx_cnt;
stmmac_napi_add(dev);
if (netif_running(dev))
ret = stmmac_open(dev);
return ret;
}
/**
* stmmac_dvr_probe
* @device: device pointer
@ -4755,7 +4818,7 @@ int stmmac_dvr_probe(struct device *device,
{
struct net_device *ndev = NULL;
struct stmmac_priv *priv;
u32 queue, rxq, maxq;
u32 rxq;
int i, ret = 0;
ndev = devm_alloc_etherdev_mqs(device, sizeof(struct stmmac_priv),
@ -4920,25 +4983,7 @@ int stmmac_dvr_probe(struct device *device,
priv->flow_ctrl = FLOW_AUTO; /* RX/TX pause on */
/* Setup channels NAPI */
maxq = max(priv->plat->rx_queues_to_use, priv->plat->tx_queues_to_use);
for (queue = 0; queue < maxq; queue++) {
struct stmmac_channel *ch = &priv->channel[queue];
spin_lock_init(&ch->lock);
ch->priv_data = priv;
ch->index = queue;
if (queue < priv->plat->rx_queues_to_use) {
netif_napi_add(ndev, &ch->rx_napi, stmmac_napi_poll_rx,
NAPI_POLL_WEIGHT);
}
if (queue < priv->plat->tx_queues_to_use) {
netif_tx_napi_add(ndev, &ch->tx_napi,
stmmac_napi_poll_tx,
NAPI_POLL_WEIGHT);
}
}
stmmac_napi_add(ndev);
mutex_init(&priv->lock);
@ -5003,14 +5048,7 @@ error_phy_setup:
priv->hw->pcs != STMMAC_PCS_RTBI)
stmmac_mdio_unregister(ndev);
error_mdio_register:
for (queue = 0; queue < maxq; queue++) {
struct stmmac_channel *ch = &priv->channel[queue];
if (queue < priv->plat->rx_queues_to_use)
netif_napi_del(&ch->rx_napi);
if (queue < priv->plat->tx_queues_to_use)
netif_napi_del(&ch->tx_napi);
}
stmmac_napi_del(ndev);
error_hw_init:
destroy_workqueue(priv->wq);