diff options
Diffstat (limited to 'target/linux/generic/patches-3.18/132-mips_inline_dma_ops.patch')
| -rw-r--r-- | target/linux/generic/patches-3.18/132-mips_inline_dma_ops.patch | 29 |
1 files changed, 28 insertions, 1 deletions
diff --git a/target/linux/generic/patches-3.18/132-mips_inline_dma_ops.patch b/target/linux/generic/patches-3.18/132-mips_inline_dma_ops.patch index 577f566d08..c13e191cf7 100644 --- a/target/linux/generic/patches-3.18/132-mips_inline_dma_ops.patch +++ b/target/linux/generic/patches-3.18/132-mips_inline_dma_ops.patch @@ -1,6 +1,33 @@ +From 2c58080407554e1bac8fd50d23cb02420524caed Mon Sep 17 00:00:00 2001 +From: Felix Fietkau <nbd@openwrt.org> +Date: Mon, 12 Aug 2013 12:50:22 +0200 +Subject: [PATCH] MIPS: partially inline dma ops + +Several DMA ops are no-op on many platforms, and the indirection through +the mips_dma_map_ops function table is causing the compiler to emit +unnecessary code. + +Inlining visibly improves network performance in my tests (on a 24Kc +based system), and also slightly reduces code size of a few drivers. + +Signed-off-by: Felix Fietkau <nbd@openwrt.org> +--- + arch/mips/Kconfig | 4 + + arch/mips/include/asm/dma-mapping.h | 360 +++++++++++++++++++++++++++++++++++- + arch/mips/mm/dma-default.c | 163 ++-------------- + 3 files changed, 373 insertions(+), 154 deletions(-) + --- a/arch/mips/Kconfig +++ b/arch/mips/Kconfig -@@ -1705,6 +1705,9 @@ config MIPS_MALTA_PM +@@ -1450,6 +1450,7 @@ config CPU_CAVIUM_OCTEON + select CPU_SUPPORTS_HUGEPAGES + select USB_EHCI_BIG_ENDIAN_MMIO + select MIPS_L1_CACHE_SHIFT_7 ++ select SYS_HAS_DMA_OPS + help + The Cavium Octeon processor is a highly integrated chip containing + many ethernet hardware widgets for networking tasks. The processor +@@ -1705,6 +1706,9 @@ config MIPS_MALTA_PM bool default y |