From mboxrd@z Thu Jan 1 00:00:00 1970 From: Wang Xiao W Subject: [PATCH 02/16] fm10k/base: use bitshift for itr_scale Date: Thu, 21 Jan 2016 18:35:47 +0800 Message-ID: <1453372561-11431-3-git-send-email-xiao.w.wang@intel.com> References: <1453372561-11431-1-git-send-email-xiao.w.wang@intel.com> Cc: dev@dpdk.org To: jing.d.chen@intel.com Return-path: Received: from mga09.intel.com (mga09.intel.com [134.134.136.24]) by dpdk.org (Postfix) with ESMTP id C3E6A8E9D for ; Thu, 21 Jan 2016 11:36:12 +0100 (CET) In-Reply-To: <1453372561-11431-1-git-send-email-xiao.w.wang@intel.com> List-Id: patches and discussions about DPDK List-Unsubscribe: , List-Archive: List-Post: List-Help: List-Subscribe: , Errors-To: dev-bounces@dpdk.org Sender: "dev" Upstream community wishes us to use bitshift instead of a divisor, because this is faster, and prevents any need for a '0' check. In our case, this even works out because default Gen3 will be 0. Because of this, we are also able to remove the check for non-zero value in the vf code path since that will already be the default Gen3 case. Signed-off-by: Wang Xiao W --- drivers/net/fm10k/base/fm10k_type.h | 6 +++--- drivers/net/fm10k/base/fm10k_vf.c | 4 ---- 2 files changed, 3 insertions(+), 7 deletions(-) diff --git a/drivers/net/fm10k/base/fm10k_type.h b/drivers/net/fm10k/base/fm10k_type.h index 62fa73f..44187b1 100644 --- a/drivers/net/fm10k/base/fm10k_type.h +++ b/drivers/net/fm10k/base/fm10k_type.h @@ -352,9 +352,9 @@ struct fm10k_hw; #define FM10K_TDLEN(_n) ((0x40 * (_n)) + 0x8002) #define FM10K_TDLEN_ITR_SCALE_SHIFT 9 #define FM10K_TDLEN_ITR_SCALE_MASK 0x00000E00 -#define FM10K_TDLEN_ITR_SCALE_GEN1 4 -#define FM10K_TDLEN_ITR_SCALE_GEN2 2 -#define FM10K_TDLEN_ITR_SCALE_GEN3 1 +#define FM10K_TDLEN_ITR_SCALE_GEN1 2 +#define FM10K_TDLEN_ITR_SCALE_GEN2 1 +#define FM10K_TDLEN_ITR_SCALE_GEN3 0 #define FM10K_TPH_TXCTRL(_n) ((0x40 * (_n)) + 0x8003) #define FM10K_TPH_TXCTRL_DESC_TPHEN 0x00000020 #define FM10K_TPH_TXCTRL_DESC_RROEN 0x00000200 diff --git a/drivers/net/fm10k/base/fm10k_vf.c b/drivers/net/fm10k/base/fm10k_vf.c index 7822ab6..39bc927 100644 --- a/drivers/net/fm10k/base/fm10k_vf.c +++ b/drivers/net/fm10k/base/fm10k_vf.c @@ -159,10 +159,6 @@ STATIC s32 fm10k_init_hw_vf(struct fm10k_hw *hw) FM10K_TDLEN_ITR_SCALE_MASK) >> FM10K_TDLEN_ITR_SCALE_SHIFT; - /* ensure a non-zero itr scale */ - if (!hw->mac.itr_scale) - hw->mac.itr_scale = FM10K_TDLEN_ITR_SCALE_GEN3; - return FM10K_SUCCESS; } -- 1.9.3