1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25
26
27
28
29
30
31
32
33
34
35
36
37
38
39
40
41
42
43
44
45
46
47
|
From 31fa4aeafa41a38c76085af4de7192c572e85119 Mon Sep 17 00:00:00 2001
From: Akhil Goyal <akhil.goyal@nxp.com>
Date: Fri, 20 Jul 2018 16:43:25 +0530
Subject: [PATCH] staging: fsl_ppfe: performance tuning for user space
interrupt coalescing of 100 usec is added.
Signed-off-by: Akhil Goyal <akhil.goyal@nxp.com>
Signed-off-by: Sachin Saxena <sachin.saxena@nxp.com>
---
drivers/staging/fsl_ppfe/pfe_cdev.c | 12 +++++++++---
1 file changed, 9 insertions(+), 3 deletions(-)
--- a/drivers/staging/fsl_ppfe/pfe_cdev.c
+++ b/drivers/staging/fsl_ppfe/pfe_cdev.c
@@ -116,15 +116,18 @@ static irqreturn_t hif_us_isr(int irq, v
if (int_status & HIF_RXPKT_INT) {
int_enable_mask &= ~(HIF_RXPKT_INT);
+ /* Disable interrupts, they will be enabled after
+ * they are serviced
+ */
+ writel_relaxed(int_enable_mask, HIF_INT_ENABLE);
+
eventfd_signal(trigger, 1);
}
- /*Disable interrupts, they will be enabled after they are serviced */
- writel_relaxed(int_enable_mask, HIF_INT_ENABLE);
-
return IRQ_HANDLED;
}
+#define PFE_INTR_COAL_USECS 100
static long pfe_cdev_ioctl(struct file *fp, unsigned int cmd,
unsigned long arg)
{
@@ -159,6 +162,9 @@ static long pfe_cdev_ioctl(struct file *
eventfd_ctx_put(g_trigger);
g_trigger = NULL;
}
+ writel((PFE_INTR_COAL_USECS * (pfe->ctrl.sys_clk / 1000)) |
+ HIF_INT_COAL_ENABLE, HIF_INT_COAL);
+
pr_debug("request_irq for hif interrupt: %d\n", pfe->hif_irq);
ret = 0;
break;
|
