From mboxrd@z Thu Jan 1 00:00:00 1970 Return-Path: Received: from dpdk.org (dpdk.org [92.243.14.124]) by inbox.dpdk.org (Postfix) with ESMTP id F345BA046B for ; Wed, 24 Jul 2019 20:52:17 +0200 (CEST) Received: from [92.243.14.124] (localhost [127.0.0.1]) by dpdk.org (Postfix) with ESMTP id 773011C25B; Wed, 24 Jul 2019 20:52:16 +0200 (CEST) Received: from mga17.intel.com (mga17.intel.com [192.55.52.151]) by dpdk.org (Postfix) with ESMTP id 0461E1C25A; Wed, 24 Jul 2019 20:52:14 +0200 (CEST) X-Amp-Result: SKIPPED(no attachment in message) X-Amp-File-Uploaded: False Received: from orsmga003.jf.intel.com ([10.7.209.27]) by fmsmga107.fm.intel.com with ESMTP/TLS/DHE-RSA-AES256-GCM-SHA384; 24 Jul 2019 11:52:13 -0700 X-ExtLoop1: 1 X-IronPort-AV: E=Sophos;i="5.64,303,1559545200"; d="scan'208";a="172391953" Received: from fyigit-mobl.ger.corp.intel.com (HELO [10.237.221.10]) ([10.237.221.10]) by orsmga003.jf.intel.com with ESMTP; 24 Jul 2019 11:52:12 -0700 To: Andrew Rybchenko , dev@dpdk.org Cc: stable@dpdk.org References: <1563973146-16577-1-git-send-email-arybchenko@solarflare.com> <1563974194-5930-1-git-send-email-arybchenko@solarflare.com> <1563974194-5930-2-git-send-email-arybchenko@solarflare.com> From: Ferruh Yigit Openpgp: preference=signencrypt Autocrypt: addr=ferruh.yigit@intel.com; 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WOW64; rv:60.0) Gecko/20100101 Thunderbird/60.8.0 MIME-Version: 1.0 In-Reply-To: Content-Type: text/plain; charset=utf-8 Content-Language: en-US Content-Transfer-Encoding: 8bit Subject: Re: [dpdk-dev] [PATCH v3 1/3] net/sfc: fix power of 2 round up when align has smaller type X-BeenThere: dev@dpdk.org X-Mailman-Version: 2.1.15 Precedence: list List-Id: DPDK patches and discussions List-Unsubscribe: , List-Archive: List-Post: List-Help: List-Subscribe: , Errors-To: dev-bounces@dpdk.org Sender: "dev" On 7/24/2019 7:41 PM, Andrew Rybchenko wrote: > On 7/24/19 7:57 PM, Ferruh Yigit wrote: >> On 7/24/2019 2:16 PM, Andrew Rybchenko wrote: >>> Substitute driver-defined P2ROUNDUP() h with EFX_P2ROUNDUP() >>> defined in libefx. >>> >>> Cast value and alignment to one specified type to guarantee result >>> correctness. >>> >>> Fixes: e1b944598579 ("net/sfc: build libefx") >>> Cc: stable@dpdk.org >>> >>> Signed-off-by: Andrew Rybchenko >> <...> >> >>> @@ -29,6 +29,10 @@ extern "C" { >>> /* The macro expands divider twice */ >>> #define EFX_DIV_ROUND_UP(_n, _d) (((_n) + (_d) - 1) / (_d)) >>> >>> +/* Round value up to the nearest power of two. */ >>> +#define EFX_P2ROUNDUP(_type, _value, _align) \ >>> + (-(-(_type)(_value) & -(_type)(_align))) >>> + >> I trust you it does what it says J >> >> Just a high level comment, should we have some kind of tools/utilities file in >> one of the libraries so everyone can use/share them? > > It is the base driver code and it is used in the base driver, so it can't > rely on any DPDK library. There are RTE_ALIGN_FLOOR/CEIL in > lib/librte_eal/common/include/rte_common.h. > > Before the patch the macro was defined in efsys.h (i.e. driver specific > and could use defines available for the driver), but in fact it was > duplicated in too many drivers and we decided to have it in libefx > (base driver in DPDK case) itself. > Yes there are lots of small functionalities duplicated in various drivers, that is why I thought perhaps we can unify them. And the base driver concern is valid for many drivers I think, since those code are mostly from a shared delivery, using DPDK specific macros in them will cause more maintenance cost.