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sfc: set and clear interrupt affinity hints 

Use cpumask_local_spread to provide interrupt affinity hints
for each queue. This will spread interrupts across NUMA local
CPUs first, extending to remote nodes if needed.

Signed-off-by: Bert Kenward <bkenward@solarflare.com>
Signed-off-by: David S. Miller <davem@davemloft.net>
This commit is contained in:
Bert Kenward 2018-04-19 17:37:25 +01:00 committed by David S. Miller
parent 263243d6c2
commit a83762d979
1 changed files with 36 additions and 0 deletions
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36
drivers/net/ethernet/sfc/efx.c
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@ -1551,6 +1551,38 @@ static int efx_probe_interrupts(struct efx_nic *efx)
return 0;
}
#if defined(CONFIG_SMP)
static void efx_set_interrupt_affinity(struct efx_nic *efx)
{
struct efx_channel *channel;
unsigned int cpu;
efx_for_each_channel(channel, efx) {
cpu = cpumask_local_spread(channel->channel,
pcibus_to_node(efx->pci_dev->bus));
irq_set_affinity_hint(channel->irq, cpumask_of(cpu));
}
}
static void efx_clear_interrupt_affinity(struct efx_nic *efx)
{
struct efx_channel *channel;
efx_for_each_channel(channel, efx)
irq_set_affinity_hint(channel->irq, NULL);
}
#else
static void
efx_set_interrupt_affinity(struct efx_nic *efx __attribute__ ((unused)))
{
}
static void
efx_clear_interrupt_affinity(struct efx_nic *efx __attribute__ ((unused)))
{
}
#endif /* CONFIG_SMP */
static int efx_soft_enable_interrupts(struct efx_nic *efx)
{
struct efx_channel *channel, *end_channel;
@ -3165,6 +3197,7 @@ static void efx_pci_remove_main(struct efx_nic *efx)
cancel_work_sync(&efx->reset_work);
efx_disable_interrupts(efx);
efx_clear_interrupt_affinity(efx);
efx_nic_fini_interrupt(efx);
efx_fini_port(efx);
efx->type->fini(efx);
@ -3314,6 +3347,8 @@ static int efx_pci_probe_main(struct efx_nic *efx)
rc = efx_nic_init_interrupt(efx);
if (rc)
goto fail5;
efx_set_interrupt_affinity(efx);
rc = efx_enable_interrupts(efx);
if (rc)
goto fail6;
@ -3321,6 +3356,7 @@ static int efx_pci_probe_main(struct efx_nic *efx)
return 0;
fail6:
efx_clear_interrupt_affinity(efx);
efx_nic_fini_interrupt(efx);
fail5:
efx_fini_port(efx);