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dpaa2-eth: Refactor xps code 

Move the code configuring xps on the netdev TX queues to a
separate function. A subsequent patch will need to call
this in another context as well.

Signed-off-by: Ioana Radulescu <ruxandra.radulescu@nxp.com>
Signed-off-by: David S. Miller <davem@davemloft.net>
This commit is contained in:
Ioana Radulescu 2019-06-11 14:50:01 +03:00 committed by David S. Miller
parent a41efedfaf
commit 06d5b17911
1 changed files with 32 additions and 13 deletions
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45
drivers/net/ethernet/freescale/dpaa2/dpaa2-eth.c
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@ -1863,6 +1863,35 @@ static int dpaa2_eth_xdp_xmit(struct net_device *net_dev, int n,
return n - drops;
}
static int update_xps(struct dpaa2_eth_priv *priv)
{
struct net_device *net_dev = priv->net_dev;
struct cpumask xps_mask;
struct dpaa2_eth_fq *fq;
int i, num_queues;
int err = 0;
num_queues = dpaa2_eth_queue_count(priv);
/* The first <num_queues> entries in priv->fq array are Tx/Tx conf
* queues, so only process those
*/
for (i = 0; i < num_queues; i++) {
fq = &priv->fq[i];
cpumask_clear(&xps_mask);
cpumask_set_cpu(fq->target_cpu, &xps_mask);
err = netif_set_xps_queue(net_dev, &xps_mask, i);
if (err) {
netdev_warn_once(net_dev, "Error setting XPS queue\n");
break;
}
}
return err;
}
static const struct net_device_ops dpaa2_eth_ops = {
.ndo_open = dpaa2_eth_open,
.ndo_start_xmit = dpaa2_eth_tx,
@ -2129,10 +2158,9 @@ static struct dpaa2_eth_channel *get_affine_channel(struct dpaa2_eth_priv *priv,
static void set_fq_affinity(struct dpaa2_eth_priv *priv)
{
struct device *dev = priv->net_dev->dev.parent;
struct cpumask xps_mask;
struct dpaa2_eth_fq *fq;
int rx_cpu, txc_cpu;
int i, err;
int i;
/* For each FQ, pick one channel/CPU to deliver frames to.
* This may well change at runtime, either through irqbalance or
@ -2151,17 +2179,6 @@ static void set_fq_affinity(struct dpaa2_eth_priv *priv)
break;
case DPAA2_TX_CONF_FQ:
fq->target_cpu = txc_cpu;
/* Tell the stack to affine to txc_cpu the Tx queue
* associated with the confirmation one
*/
cpumask_clear(&xps_mask);
cpumask_set_cpu(txc_cpu, &xps_mask);
err = netif_set_xps_queue(priv->net_dev, &xps_mask,
fq->flowid);
if (err)
dev_err(dev, "Error setting XPS queue\n");
txc_cpu = cpumask_next(txc_cpu, &priv->dpio_cpumask);
if (txc_cpu >= nr_cpu_ids)
txc_cpu = cpumask_first(&priv->dpio_cpumask);
@ -2171,6 +2188,8 @@ static void set_fq_affinity(struct dpaa2_eth_priv *priv)
}
fq->channel = get_affine_channel(priv, fq->target_cpu);
}
update_xps(priv);
}
static void setup_fqs(struct dpaa2_eth_priv *priv)