Commit a83762d9 authored by Bert Kenward's avatar Bert Kenward Committed by David S. Miller
Browse files

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: default avatarBert Kenward <bkenward@solarflare.com>
Signed-off-by: default avatarDavid S. Miller <davem@davemloft.net>
parent 263243d6

drivers/net/ethernet/sfc/efx.c

+36 −0
Original line number Diff line number Diff line
@@ -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);

CRA Git | Maintained and supported by SUSTech CRA and CCSE