From patchwork Tue Oct 15 14:53:34 2024 Content-Type: text/plain; charset="utf-8" MIME-Version: 1.0 Content-Transfer-Encoding: 7bit X-Patchwork-Submitter: Alexander Lobakin X-Patchwork-Id: 13836582 X-Patchwork-Delegate: bpf@iogearbox.net Received: from mgamail.intel.com (mgamail.intel.com [192.198.163.13]) (using TLSv1.2 with cipher ECDHE-RSA-AES256-GCM-SHA384 (256/256 bits)) (No client certificate requested) by smtp.subspace.kernel.org (Postfix) with ESMTPS id BC3261D5159; Tue, 15 Oct 2024 14:54:21 +0000 (UTC) Authentication-Results: smtp.subspace.kernel.org; arc=none smtp.client-ip=192.198.163.13 ARC-Seal: i=1; a=rsa-sha256; d=subspace.kernel.org; s=arc-20240116; t=1729004063; cv=none; b=CbaFjsqn1ZZqLHCLyiZNebSQEGK176sVG/V+dTpY6Jwz7sSLomHjU0E1vH9tM0qJETCHEZ6HMQZM90wAmIygBtyy394P3KVWXVXzBPLzsTobYNsD6rRLyjR6ajXRmJVX+1uROYyMcOwkT7ziQOSERJO2P28QQ6uISJyaj0wEAtg= ARC-Message-Signature: i=1; a=rsa-sha256; d=subspace.kernel.org; s=arc-20240116; t=1729004063; c=relaxed/simple; bh=fvL+wbT3+sbiRRPRxSq70GK72WAXKB5l+R9CcGE2oxA=; h=From:To:Cc:Subject:Date:Message-ID:In-Reply-To:References: MIME-Version; b=ql7ogkhc1OYFmjVJP+Qv+lpBd/N0kQ2b7JyP8v+nJSvkVFC7U0xf/F1FpO2jm+br9BhqWk0oGAbug7QwCi5z4yWKrinH5PLigPJnfJE+aXTeMGKivJnah658dXJY1B2wX7YJn02I9Nah6Vvsv2uzLOdgBNTeTiiE9nUFWv6p6nM= ARC-Authentication-Results: i=1; smtp.subspace.kernel.org; dmarc=pass (p=none dis=none) header.from=intel.com; spf=pass smtp.mailfrom=intel.com; dkim=pass (2048-bit key) header.d=intel.com header.i=@intel.com header.b=VzDfeK5z; arc=none smtp.client-ip=192.198.163.13 Authentication-Results: smtp.subspace.kernel.org; dmarc=pass (p=none dis=none) header.from=intel.com Authentication-Results: smtp.subspace.kernel.org; spf=pass smtp.mailfrom=intel.com Authentication-Results: smtp.subspace.kernel.org; dkim=pass (2048-bit key) header.d=intel.com header.i=@intel.com header.b="VzDfeK5z" DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/simple; d=intel.com; i=@intel.com; q=dns/txt; s=Intel; t=1729004062; x=1760540062; h=from:to:cc:subject:date:message-id:in-reply-to: references:mime-version:content-transfer-encoding; bh=fvL+wbT3+sbiRRPRxSq70GK72WAXKB5l+R9CcGE2oxA=; b=VzDfeK5z9rSBRLEWTiOOLKRbnpI9Y2pSI5mre3iRjlMPtGoPs5HwQMMZ l/a3vYsSpmnn79C6bQUmNcEYSme2neLuNySfjUF0Oj8W3/SAML79VYrRP AfOrP6Mcoinsno85ocNd5IgZ3oRz5BDrh+N5HfqNZiYmuAFHrUGgZOn8r qVbXhxJ8VZPjYEB25DekdqWYeUMSwN29JK1eyQBl5sauAJ3ito0mZShaD bvQ5oFE1ZF1ZPyBMOxtgjTFbBFUmTSxhFJqeJRE2lzm40UbS7UiSYhLik 4zkJ5H8MyxsLx2NJlSPUH31ZOuJgYN8m/SMjjfjc5Ln/P8SISPhRQ62Mr A==; X-CSE-ConnectionGUID: txZDTbehRvyRNMtHB4PW9A== X-CSE-MsgGUID: eHtJVNVrR1yao7D4a9e7LQ== X-IronPort-AV: E=McAfee;i="6700,10204,11225"; a="31277462" X-IronPort-AV: E=Sophos;i="6.11,205,1725346800"; d="scan'208";a="31277462" Received: from orviesa003.jf.intel.com ([10.64.159.143]) by fmvoesa107.fm.intel.com with ESMTP/TLS/ECDHE-RSA-AES256-GCM-SHA384; 15 Oct 2024 07:54:21 -0700 X-CSE-ConnectionGUID: wv345NLsST2WVS+97BxkWA== X-CSE-MsgGUID: FwZes+DHQ9e74O3xiH8F6g== X-ExtLoop1: 1 X-IronPort-AV: E=Sophos;i="6.11,199,1725346800"; d="scan'208";a="82723042" Received: from newjersey.igk.intel.com ([10.102.20.203]) by orviesa003.jf.intel.com with ESMTP; 15 Oct 2024 07:54:18 -0700 From: Alexander Lobakin To: "David S. Miller" , Eric Dumazet , Jakub Kicinski , Paolo Abeni Cc: Alexander Lobakin , =?utf-8?q?Toke_H=C3=B8?= =?utf-8?q?iland-J=C3=B8rgensen?= , Alexei Starovoitov , Daniel Borkmann , John Fastabend , Andrii Nakryiko , Stanislav Fomichev , Magnus Karlsson , nex.sw.ncis.osdt.itp.upstreaming@intel.com, bpf@vger.kernel.org, netdev@vger.kernel.org, linux-kernel@vger.kernel.org Subject: [PATCH net-next v2 02/18] skbuff: allow 2-4-argument skb_frag_dma_map() Date: Tue, 15 Oct 2024 16:53:34 +0200 Message-ID: <20241015145350.4077765-3-aleksander.lobakin@intel.com> X-Mailer: git-send-email 2.46.2 In-Reply-To: <20241015145350.4077765-1-aleksander.lobakin@intel.com> References: <20241015145350.4077765-1-aleksander.lobakin@intel.com> Precedence: bulk X-Mailing-List: bpf@vger.kernel.org List-Id: List-Subscribe: List-Unsubscribe: MIME-Version: 1.0 X-Patchwork-Delegate: kuba@kernel.org skb_frag_dma_map(dev, frag, 0, skb_frag_size(frag), DMA_TO_DEVICE) is repeated across dozens of drivers and really wants a shorthand. Add a macro which will count args and handle all possible number from 2 to 5. Semantics: skb_frag_dma_map(dev, frag) -> __skb_frag_dma_map(dev, frag, 0, skb_frag_size(frag), DMA_TO_DEVICE) skb_frag_dma_map(dev, frag, offset) -> __skb_frag_dma_map(dev, frag, offset, skb_frag_size(frag) - offset, DMA_TO_DEVICE) skb_frag_dma_map(dev, frag, offset, size) -> __skb_frag_dma_map(dev, frag, offset, size, DMA_TO_DEVICE) skb_frag_dma_map(dev, frag, offset, size, dir) -> __skb_frag_dma_map(dev, frag, offset, size, dir) No object code size changes for the existing callers. Users passing less arguments also won't have bigger size comparing to the full equivalent call. Signed-off-by: Alexander Lobakin --- include/linux/skbuff.h | 31 ++++++++++++++++++++++++++----- 1 file changed, 26 insertions(+), 5 deletions(-) diff --git a/include/linux/skbuff.h b/include/linux/skbuff.h index 48f1e0fa2a13..f187a2415fb8 100644 --- a/include/linux/skbuff.h +++ b/include/linux/skbuff.h @@ -3642,7 +3642,7 @@ static inline void skb_frag_page_copy(skb_frag_t *fragto, bool skb_page_frag_refill(unsigned int sz, struct page_frag *pfrag, gfp_t prio); /** - * skb_frag_dma_map - maps a paged fragment via the DMA API + * __skb_frag_dma_map - maps a paged fragment via the DMA API * @dev: the device to map the fragment to * @frag: the paged fragment to map * @offset: the offset within the fragment (starting at the @@ -3652,15 +3652,36 @@ bool skb_page_frag_refill(unsigned int sz, struct page_frag *pfrag, gfp_t prio); * * Maps the page associated with @frag to @device. */ -static inline dma_addr_t skb_frag_dma_map(struct device *dev, - const skb_frag_t *frag, - size_t offset, size_t size, - enum dma_data_direction dir) +static inline dma_addr_t __skb_frag_dma_map(struct device *dev, + const skb_frag_t *frag, + size_t offset, size_t size, + enum dma_data_direction dir) { return dma_map_page(dev, skb_frag_page(frag), skb_frag_off(frag) + offset, size, dir); } +#define skb_frag_dma_map(dev, frag, ...) \ + CONCATENATE(_skb_frag_dma_map, \ + COUNT_ARGS(__VA_ARGS__))(dev, frag, ##__VA_ARGS__) + +#define __skb_frag_dma_map1(dev, frag, offset, uf, uo) ({ \ + const skb_frag_t *uf = (frag); \ + size_t uo = (offset); \ + \ + __skb_frag_dma_map(dev, uf, uo, skb_frag_size(uf) - uo, \ + DMA_TO_DEVICE); \ +}) +#define _skb_frag_dma_map1(dev, frag, offset) \ + __skb_frag_dma_map1(dev, frag, offset, __UNIQUE_ID(frag_), \ + __UNIQUE_ID(offset_)) +#define _skb_frag_dma_map0(dev, frag) \ + _skb_frag_dma_map1(dev, frag, 0) +#define _skb_frag_dma_map2(dev, frag, offset, size) \ + __skb_frag_dma_map(dev, frag, offset, size, DMA_TO_DEVICE) +#define _skb_frag_dma_map3(dev, frag, offset, size, dir) \ + __skb_frag_dma_map(dev, frag, offset, size, dir) + static inline struct sk_buff *pskb_copy(struct sk_buff *skb, gfp_t gfp_mask) {