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

   1 From 5112e9234bbb89f8dd15c983206bd9107b8436d5 Mon Sep 17 00:00:00 2001
   2 From: Aleksander Jan Bajkowski <olek2@wp.pl>
   3 Date: Tue, 4 Jan 2022 16:11:42 +0100
   4 Subject: [PATCH 713/715] MIPS: lantiq: dma: increase descritor count
   5
   6 NAT Performance results on BT Home Hub 5A (kernel 5.10.89, mtu 1500):
   7
   8         Down            Up
   9 Before  539 Mbps        599 Mbps
  10 After   545 Mbps        625 Mbps
  11
  12 Signed-off-by: Aleksander Jan Bajkowski <olek2@wp.pl>
  13 Signed-off-by: Jakub Kicinski <kuba@kernel.org>
  14 ---
  15  arch/mips/include/asm/mach-lantiq/xway/xway_dma.h | 2 +-
  16  1 file changed, 1 insertion(+), 1 deletion(-)
  17
  18 --- a/arch/mips/include/asm/mach-lantiq/xway/xway_dma.h
  19 +++ b/arch/mips/include/asm/mach-lantiq/xway/xway_dma.h
  20 @@ -8,7 +8,7 @@
  21  #define LTQ_DMA_H__
  22
  23  #define LTQ_DESC_SIZE          0x08    /* each descriptor is 64bit */
  24 -#define LTQ_DESC_NUM           0x40    /* 64 descriptors / channel */
  25 +#define LTQ_DESC_NUM           0xC0    /* 192 descriptors / channel */
  26
  27  #define LTQ_DMA_OWN            BIT(31) /* owner bit */
  28  #define LTQ_DMA_C              BIT(30) /* complete bit */