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net: hns: Fix the implementation of irq affinity function 

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
Show Stats Download Patch File Download Diff File Expand all files Collapse all files

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 *);