On Tue, Jan 17, 2017 at 4:50 PM, Mao Wenan <maowe...@huawei.com> wrote:
> Relax ordering(RO) is one feature of 82599 NIC, to enable this feature can
> enhance the performance for some cpu architecure, such as SPARC and so on.
> Currently it only supports one special cpu architecture(SPARC) in 82599
> driver to enable RO feature, this is not very common for other cpu
> architecture
> which really needs RO feature.
> This patch add one common config CONFIG_ARCH_WANT_RELAX_ORDER to set RO
> feature,
> and should define CONFIG_ARCH_WANT_RELAX_ORDER in sparc Kconfig firstly.
>
> Signed-off-by: Mao Wenan <maowe...@huawei.com>
> Reviewed-by: Alexander Duyck <alexander.du...@gmail.com>
Reviewed-by: Alexander Duyck <alexander.h.du...@intel.com>
> ---
> v2 -> v3: add reviewed information.
> ---
> arch/Kconfig | 3 +++
> arch/sparc/Kconfig | 1 +
> drivers/net/ethernet/intel/ixgbe/ixgbe_common.c | 2 +-
> 3 files changed, 5 insertions(+), 1 deletion(-)
>
> diff --git a/arch/Kconfig b/arch/Kconfig
> index 99839c2..bd04eac 100644
> --- a/arch/Kconfig
> +++ b/arch/Kconfig
> @@ -781,4 +781,7 @@ config VMAP_STACK
> the stack to map directly to the KASAN shadow map using a formula
> that is incorrect if the stack is in vmalloc space.
>
> +config ARCH_WANT_RELAX_ORDER
> + bool
> +
> source "kernel/gcov/Kconfig"
> diff --git a/arch/sparc/Kconfig b/arch/sparc/Kconfig
> index cf4034c..68ac5c7 100644
> --- a/arch/sparc/Kconfig
> +++ b/arch/sparc/Kconfig
> @@ -44,6 +44,7 @@ config SPARC
> select CPU_NO_EFFICIENT_FFS
> select HAVE_ARCH_HARDENED_USERCOPY
> select PROVE_LOCKING_SMALL if PROVE_LOCKING
> + select ARCH_WANT_RELAX_ORDER
>
> config SPARC32
> def_bool !64BIT
> diff --git a/drivers/net/ethernet/intel/ixgbe/ixgbe_common.c
> b/drivers/net/ethernet/intel/ixgbe/ixgbe_common.c
> index 094e1d6..c38d50c 100644
> --- a/drivers/net/ethernet/intel/ixgbe/ixgbe_common.c
> +++ b/drivers/net/ethernet/intel/ixgbe/ixgbe_common.c
> @@ -350,7 +350,7 @@ s32 ixgbe_start_hw_gen2(struct ixgbe_hw *hw)
> }
> IXGBE_WRITE_FLUSH(hw);
>
> -#ifndef CONFIG_SPARC
> +#ifndef CONFIG_ARCH_WANT_RELAX_ORDER
> /* Disable relaxed ordering */
> for (i = 0; i < hw->mac.max_tx_queues; i++) {
> u32 regval;
> --
> 2.7.0
>
>
