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48 lines
1.4 KiB
Diff
48 lines
1.4 KiB
Diff
From 31fa4aeafa41a38c76085af4de7192c572e85119 Mon Sep 17 00:00:00 2001
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From: Akhil Goyal <akhil.goyal@nxp.com>
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Date: Fri, 20 Jul 2018 16:43:25 +0530
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Subject: [PATCH] staging: fsl_ppfe: performance tuning for user space
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interrupt coalescing of 100 usec is added.
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Signed-off-by: Akhil Goyal <akhil.goyal@nxp.com>
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Signed-off-by: Sachin Saxena <sachin.saxena@nxp.com>
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---
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drivers/staging/fsl_ppfe/pfe_cdev.c | 12 +++++++++---
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1 file changed, 9 insertions(+), 3 deletions(-)
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--- a/drivers/staging/fsl_ppfe/pfe_cdev.c
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+++ b/drivers/staging/fsl_ppfe/pfe_cdev.c
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@@ -116,15 +116,18 @@ static irqreturn_t hif_us_isr(int irq, v
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if (int_status & HIF_RXPKT_INT) {
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int_enable_mask &= ~(HIF_RXPKT_INT);
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+ /* Disable interrupts, they will be enabled after
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+ * they are serviced
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+ */
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+ writel_relaxed(int_enable_mask, HIF_INT_ENABLE);
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+
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eventfd_signal(trigger, 1);
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}
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- /*Disable interrupts, they will be enabled after they are serviced */
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- writel_relaxed(int_enable_mask, HIF_INT_ENABLE);
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-
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return IRQ_HANDLED;
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}
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+#define PFE_INTR_COAL_USECS 100
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static long pfe_cdev_ioctl(struct file *fp, unsigned int cmd,
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unsigned long arg)
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{
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@@ -159,6 +162,9 @@ static long pfe_cdev_ioctl(struct file *
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eventfd_ctx_put(g_trigger);
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g_trigger = NULL;
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}
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+ writel((PFE_INTR_COAL_USECS * (pfe->ctrl.sys_clk / 1000)) |
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+ HIF_INT_COAL_ENABLE, HIF_INT_COAL);
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+
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pr_debug("request_irq for hif interrupt: %d\n", pfe->hif_irq);
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ret = 0;
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break;
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