diff options
| author | Anup Patel <anup.patel@broadcom.com> | 2017-08-01 16:05:50 +0530 |
|---|---|---|
| committer | Jassi Brar <jaswinder.singh@linaro.org> | 2017-08-31 08:38:44 +0530 |
| commit | 6ac17fe8c14aaec3940a92a6b39fe3f6389f5a4d (patch) | |
| tree | fd5273bd61e38e568ea8e4f19869aa75b5d85322 | |
| parent | 14ccee78fc82f5512908f4424f541549a5705b89 (diff) | |
| download | linux-6ac17fe8c14aaec3940a92a6b39fe3f6389f5a4d.tar.bz2 | |
mailbox: bcm-flexrm-mailbox: Set IRQ affinity hint for FlexRM ring IRQs
This patch set IRQ affinity hint for FlexRM ring IRQ at time of
enabling ring (i.e. flexrm_startup()). The IRQ affinity hint will
allow FlexRM driver to distribute FlexRM ring IRQs across online
CPUs so that all FlexRM ring IRQs don't land in CPU0 by default.
Signed-off-by: Anup Patel <anup.patel@broadcom.com>
Reviewed-by: Ray Jui <ray.jui@broadcom.com>
Reviewed-by: Scott Branden <scott.branden@broadcom.com>
Signed-off-by: Jassi Brar <jaswinder.singh@linaro.org>
| -rw-r--r-- | drivers/mailbox/bcm-flexrm-mailbox.c | 17 |
1 files changed, 17 insertions, 0 deletions
diff --git a/drivers/mailbox/bcm-flexrm-mailbox.c b/drivers/mailbox/bcm-flexrm-mailbox.c index da67882caa7b..e8c3666e94cf 100644 --- a/drivers/mailbox/bcm-flexrm-mailbox.c +++ b/drivers/mailbox/bcm-flexrm-mailbox.c @@ -260,6 +260,7 @@ struct flexrm_ring { void __iomem *regs; bool irq_requested; unsigned int irq; + cpumask_t irq_aff_hint; unsigned int msi_timer_val; unsigned int msi_count_threshold; struct ida requests_ida; @@ -1217,6 +1218,18 @@ static int flexrm_startup(struct mbox_chan *chan) } ring->irq_requested = true; + /* Set IRQ affinity hint */ + ring->irq_aff_hint = CPU_MASK_NONE; + val = ring->mbox->num_rings; + val = (num_online_cpus() < val) ? val / num_online_cpus() : 1; + cpumask_set_cpu((ring->num / val) % num_online_cpus(), + &ring->irq_aff_hint); + ret = irq_set_affinity_hint(ring->irq, &ring->irq_aff_hint); + if (ret) { + dev_err(ring->mbox->dev, "failed to set IRQ affinity hint\n"); + goto fail_free_irq; + } + /* Disable/inactivate ring */ writel_relaxed(0x0, ring->regs + RING_CONTROL); @@ -1261,6 +1274,9 @@ static int flexrm_startup(struct mbox_chan *chan) return 0; +fail_free_irq: + free_irq(ring->irq, ring); + ring->irq_requested = false; fail_free_cmpl_memory: dma_pool_free(ring->mbox->cmpl_pool, ring->cmpl_base, ring->cmpl_dma_base); @@ -1314,6 +1330,7 @@ static void flexrm_shutdown(struct mbox_chan *chan) /* Release IRQ */ if (ring->irq_requested) { + irq_set_affinity_hint(ring->irq, NULL); free_irq(ring->irq, ring); ring->irq_requested = false; } |