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net: hns: Fix the implementation of irq affinity function

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This patch fixes the implementation of the IRQ affinity
function. This function is used to create the cpu mask
which eventually is used to initialize the cpu<->queue
association for XPS(Transmit Packet Steering).

Signed-off-by: lipeng <lipeng321@huawei.com>
Signed-off-by: Kejian Yan <yankejian@huawei.com>
Reviewed-by: Yisen Zhuang <yisen.zhuang@huawei.com>
Signed-off-by: Salil Mehta <salil.mehta@huawei.com>
Signed-off-by: David S. Miller <davem@davemloft.net>
This commit is contained in:
lipeng 2017-04-01 12:03:31 +01:00 committed by David S. Miller
parent d4f4b91582
commit ba2d079131
2 changed files with 30 additions and 46 deletions
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75
drivers/net/ethernet/hisilicon/hns/hns_enet.c
View File

@ -1196,54 +1196,31 @@ static void hns_nic_ring_close(struct net_device *netdev, int idx)
napi_disable(&priv->ring_data[idx].napi);
}
static void hns_set_irq_affinity(struct hns_nic_priv *priv)
static int hns_nic_init_affinity_mask(int q_num, int ring_idx,
struct hnae_ring *ring, cpumask_t *mask)
{
struct hnae_handle *h = priv->ae_handle;
struct hns_nic_ring_data *rd;
int i;
int cpu;
cpumask_var_t mask;
if (!alloc_cpumask_var(&mask, GFP_KERNEL))
return;
/*diffrent irq banlance for 16core and 32core*/
if (h->q_num == num_possible_cpus()) {
for (i = 0; i < h->q_num * 2; i++) {
rd = &priv->ring_data[i];
if (cpu_online(rd->queue_index)) {
cpumask_clear(mask);
cpu = rd->queue_index;
cpumask_set_cpu(cpu, mask);
(void)irq_set_affinity_hint(rd->ring->irq,
mask);
}
}
/* Diffrent irq banlance between 16core and 32core.
* The cpu mask set by ring index according to the ring flag
* which indicate the ring is tx or rx.
*/
if (q_num == num_possible_cpus()) {
if (is_tx_ring(ring))
cpu = ring_idx;
else
cpu = ring_idx - q_num;
} else {
for (i = 0; i < h->q_num; i++) {
rd = &priv->ring_data[i];
if (cpu_online(rd->queue_index * 2)) {
cpumask_clear(mask);
cpu = rd->queue_index * 2;
cpumask_set_cpu(cpu, mask);
(void)irq_set_affinity_hint(rd->ring->irq,
mask);
}
}
for (i = h->q_num; i < h->q_num * 2; i++) {
rd = &priv->ring_data[i];
if (cpu_online(rd->queue_index * 2 + 1)) {
cpumask_clear(mask);
cpu = rd->queue_index * 2 + 1;
cpumask_set_cpu(cpu, mask);
(void)irq_set_affinity_hint(rd->ring->irq,
mask);
}
}
if (is_tx_ring(ring))
cpu = ring_idx * 2;
else
cpu = (ring_idx - q_num) * 2 + 1;
}
free_cpumask_var(mask);
cpumask_clear(mask);
cpumask_set_cpu(cpu, mask);
return cpu;
}
static int hns_nic_init_irq(struct hns_nic_priv *priv)
@ -1252,6 +1229,7 @@ static int hns_nic_init_irq(struct hns_nic_priv *priv)
struct hns_nic_ring_data *rd;
int i;
int ret;
int cpu;
for (i = 0; i < h->q_num * 2; i++) {
rd = &priv->ring_data[i];
@ -1261,7 +1239,7 @@ static int hns_nic_init_irq(struct hns_nic_priv *priv)
snprintf(rd->ring->ring_name, RCB_RING_NAME_LEN,
"%s-%s%d", priv->netdev->name,
(i < h->q_num ? "tx" : "rx"), rd->queue_index);
(is_tx_ring(rd->ring) ? "tx" : "rx"), rd->queue_index);
rd->ring->ring_name[RCB_RING_NAME_LEN - 1] = '\0';
@ -1273,12 +1251,17 @@ static int hns_nic_init_irq(struct hns_nic_priv *priv)
return ret;
}
disable_irq(rd->ring->irq);
cpu = hns_nic_init_affinity_mask(h->q_num, i,
rd->ring, &rd->mask);
if (cpu_online(cpu))
irq_set_affinity_hint(rd->ring->irq,
&rd->mask);
rd->ring->irq_init_flag = RCB_IRQ_INITED;
}
/*set cpu affinity*/
hns_set_irq_affinity(priv);
return 0;
}

1
drivers/net/ethernet/hisilicon/hns/hns_enet.h
View File

@ -37,6 +37,7 @@ enum hns_nic_state {
struct hns_nic_ring_data {
struct hnae_ring *ring;
struct napi_struct napi;
cpumask_t mask; /* affinity mask */
int queue_index;
int (*poll_one)(struct hns_nic_ring_data *, int, void *);
void (*ex_process)(struct hns_nic_ring_data *, struct sk_buff *);