kernel/lantiq: Restore kernel files for v5.15

[openwrt/openwrt.git] / target / linux / lantiq / patches-5.15 / 0713-v5.17-MIPS-lantiq-dma-increase-descritor-count.patch

diff --git a/target/linux/lantiq/patches-5.15/0713-v5.17-MIPS-lantiq-dma-increase-descritor-count.patch b/target/linux/lantiq/patches-5.15/0713-v5.17-MIPS-lantiq-dma-increase-descritor-count.patch
new file mode 100644 (file)
index 0000000..37ed1d4
--- /dev/null
+++ b/target/linux/lantiq/patches-5.15/0713-v5.17-MIPS-lantiq-dma-increase-descritor-count.patch
@@ -0,0 +1,28 @@
+From 5112e9234bbb89f8dd15c983206bd9107b8436d5 Mon Sep 17 00:00:00 2001
+From: Aleksander Jan Bajkowski <olek2@wp.pl>
+Date: Tue, 4 Jan 2022 16:11:42 +0100
+Subject: [PATCH 713/715] MIPS: lantiq: dma: increase descritor count
+
+NAT Performance results on BT Home Hub 5A (kernel 5.10.89, mtu 1500):
+
+       Down            Up
+Before 539 Mbps        599 Mbps
+After  545 Mbps        625 Mbps
+
+Signed-off-by: Aleksander Jan Bajkowski <olek2@wp.pl>
+Signed-off-by: Jakub Kicinski <kuba@kernel.org>
+---
+ arch/mips/include/asm/mach-lantiq/xway/xway_dma.h | 2 +-
+ 1 file changed, 1 insertion(+), 1 deletion(-)
+
+--- a/arch/mips/include/asm/mach-lantiq/xway/xway_dma.h
++++ b/arch/mips/include/asm/mach-lantiq/xway/xway_dma.h
+@@ -8,7 +8,7 @@
+ #define LTQ_DMA_H__
+ 
+ #define LTQ_DESC_SIZE         0x08    /* each descriptor is 64bit */
+-#define LTQ_DESC_NUM          0x40    /* 64 descriptors / channel */
++#define LTQ_DESC_NUM          0xC0    /* 192 descriptors / channel */
+ 
+ #define LTQ_DMA_OWN           BIT(31) /* owner bit */
+ #define LTQ_DMA_C             BIT(30) /* complete bit */