diff options
| author | Sunil Goutham <sgoutham@cavium.com> | 2016-02-11 21:50:23 +0530 |
|---|---|---|
| committer | David S. Miller <davem@davemloft.net> | 2016-02-11 11:30:26 -0500 |
| commit | fb4b7d98a0215fc3310c8415a86acfe726de395c (patch) | |
| tree | 61bbd0aaffcc7ce5aba60e17ad684f79b61fe31e /drivers/net/ethernet/cavium/thunder/nicvf_main.c | |
| parent | ef0a4d8601760b346d9d0893f2a554c338861c4f (diff) | |
| download | linux-fb4b7d98a0215fc3310c8415a86acfe726de395c.tar.bz2 | |
net: thunderx: Assign affinity hints to vf's interrupts
This affinity hint can be used by user space irqbalance tool to set
preferred CPU mask for irqs registered by this VF. Irqbalance needs
to be in 'exact' mode to set irq affinity same as indicated by
affinity hint.
Signed-off-by: Sunil Goutham <sgoutham@cavium.com>
Signed-off-by: David S. Miller <davem@davemloft.net>
Diffstat (limited to 'drivers/net/ethernet/cavium/thunder/nicvf_main.c')
| -rw-r--r-- | drivers/net/ethernet/cavium/thunder/nicvf_main.c | 37 |
1 files changed, 35 insertions, 2 deletions
diff --git a/drivers/net/ethernet/cavium/thunder/nicvf_main.c b/drivers/net/ethernet/cavium/thunder/nicvf_main.c index c6f146cf266d..90ce93e380e1 100644 --- a/drivers/net/ethernet/cavium/thunder/nicvf_main.c +++ b/drivers/net/ethernet/cavium/thunder/nicvf_main.c @@ -899,6 +899,31 @@ static void nicvf_disable_msix(struct nicvf *nic) } } +static void nicvf_set_irq_affinity(struct nicvf *nic) +{ + int vec, cpu; + int irqnum; + + for (vec = 0; vec < nic->num_vec; vec++) { + if (!nic->irq_allocated[vec]) + continue; + + if (!zalloc_cpumask_var(&nic->affinity_mask[vec], GFP_KERNEL)) + return; + /* CQ interrupts */ + if (vec < NICVF_INTR_ID_SQ) + /* Leave CPU0 for RBDR and other interrupts */ + cpu = nicvf_netdev_qidx(nic, vec) + 1; + else + cpu = 0; + + cpumask_set_cpu(cpumask_local_spread(cpu, nic->node), + nic->affinity_mask[vec]); + irqnum = nic->msix_entries[vec].vector; + irq_set_affinity_hint(irqnum, nic->affinity_mask[vec]); + } +} + static int nicvf_register_interrupts(struct nicvf *nic) { int irq, ret = 0; @@ -944,8 +969,13 @@ static int nicvf_register_interrupts(struct nicvf *nic) ret = request_irq(nic->msix_entries[irq].vector, nicvf_qs_err_intr_handler, 0, nic->irq_name[irq], nic); - if (!ret) - nic->irq_allocated[irq] = true; + if (ret) + goto err; + + nic->irq_allocated[irq] = true; + + /* Set IRQ affinities */ + nicvf_set_irq_affinity(nic); err: if (ret) @@ -963,6 +993,9 @@ static void nicvf_unregister_interrupts(struct nicvf *nic) if (!nic->irq_allocated[irq]) continue; + irq_set_affinity_hint(nic->msix_entries[irq].vector, NULL); + free_cpumask_var(nic->affinity_mask[irq]); + if (irq < NICVF_INTR_ID_SQ) free_irq(nic->msix_entries[irq].vector, nic->napi[irq]); else |