1 files changed, 47 insertions, 0 deletions
diff --git a/target/linux/layerscape/patches-5.4/701-net-0310-staging-fsl_ppfe-performance-tuning-for-user-space.patch b/target/linux/layerscape/patches-5.4/701-net-0310-staging-fsl_ppfe-performance-tuning-for-user-space.patch
new file mode 100644
index 0000000000..8eac290b3a
--- /dev/null
+++ b/target/linux/layerscape/patches-5.4/701-net-0310-staging-fsl_ppfe-performance-tuning-for-user-space.patch
@@ -0,0 +1,47 @@
+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;