From mboxrd@z Thu Jan 1 00:00:00 1970 Return-Path: X-Spam-Checker-Version: SpamAssassin 3.4.0 (2014-02-07) on aws-us-west-2-korg-lkml-1.web.codeaurora.org Received: from bombadil.infradead.org (bombadil.infradead.org [198.137.202.133]) (using TLSv1.2 with cipher ECDHE-RSA-AES256-GCM-SHA384 (256/256 bits)) (No client certificate requested) by smtp.lore.kernel.org (Postfix) with ESMTPS id 38C4FCD8C8C for ; Thu, 13 Nov 2025 15:16:51 +0000 (UTC) DKIM-Signature: v=1; a=rsa-sha256; q=dns/txt; c=relaxed/relaxed; d=lists.infradead.org; s=bombadil.20210309; h=Sender:List-Subscribe:List-Help :List-Post:List-Archive:List-Unsubscribe:List-Id:Content-Transfer-Encoding: MIME-Version:Message-ID:Date:Subject:Cc:To:From:Reply-To:Content-Type: Content-ID:Content-Description:Resent-Date:Resent-From:Resent-Sender: Resent-To:Resent-Cc:Resent-Message-ID:In-Reply-To:References:List-Owner; bh=s1T7Aww/+lB4oEGw86daaMhK7pzaqngcRd2tDwFthOA=; b=Amy/8+NKxNnvV5WQXwXid59pYX ryg3FrjtCRu936RfWmoL0U3VK7TWNqrkWhatuGDV3YYEuEZQCMruIVUsndXrPT2XiSzsi5y24yc0o ShBScR5OkZ6Y14FlKuGUA/78XOIrcdR4CtW79SKVc9nnb5sG4L0H/iJpWMi4SWTpV5Tk8/x/ylEF4 YGHk2LigtB7bVyY7DaEpTxdOTmjNtBuViXlKW01/DguaSQppA0CzCGl5jFxAu8BvbwkpX8sC0VA8O DnDVWriNp14OCF/f6jICthY5CkTZ4JlfM2mnCG0RX0MMl//Wq7p3OdssmEnTOIh5ATFz56bb3SDv2 BBR54q7w==; Received: from localhost ([::1] helo=bombadil.infradead.org) by bombadil.infradead.org with esmtp (Exim 4.98.2 #2 (Red Hat Linux)) id 1vJZ3x-0000000Ah7i-0hHB; Thu, 13 Nov 2025 15:16:41 +0000 Received: from mgamail.intel.com ([192.198.163.9]) by bombadil.infradead.org with esmtps (Exim 4.98.2 #2 (Red Hat Linux)) id 1vJZ3c-0000000AgpU-1IUM; Thu, 13 Nov 2025 15:16:21 +0000 DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/simple; d=intel.com; i=@intel.com; q=dns/txt; s=Intel; t=1763046980; x=1794582980; h=from:to:cc:subject:date:message-id:mime-version: content-transfer-encoding; bh=YgPrha/FWL+rx0Hr+rnyQmwA7SuU4BQbCsM9ur+PqQ4=; b=G/jUTiyz8cZub7mbIRCYJiIXU8fEmYbTZ9dkR07OwMF0SrOxTpSN6pNZ +pV1cFwRXkjlPqQKtmnAEnxKRVnOWaTyhqLec9E8ZXExXTqdfU6xhMvov ucROf1bBKrEiOvr5n6IjdgrvaexA9b3t3h6wSPMC/sslbClxEimJUq3x9 7q9r/gBc99Bz/H9LdkFXe97GPA6/9B3twC/kTEysXn8dMVPq6JvhtvVoY fv8NVRmQKYT0bXRwUqr9ey7/CCwpusMmPV6935Y2+4rVl3lZdc7tYiEuB /FjEvnSJ4UHrmXkhWMoncuy7i0hAISsMvUx7IWpSSDszcIjVvdDX0a3vf g==; X-CSE-ConnectionGUID: HVNa64OoTg+bOztZEzaG6Q== X-CSE-MsgGUID: KAe3g7G5Toi9pVFtBNbUUA== X-IronPort-AV: E=McAfee;i="6800,10657,11612"; a="75809640" X-IronPort-AV: E=Sophos;i="6.19,302,1754982000"; d="scan'208";a="75809640" Received: from orviesa005.jf.intel.com ([10.64.159.145]) by fmvoesa103.fm.intel.com with ESMTP/TLS/ECDHE-RSA-AES256-GCM-SHA384; 13 Nov 2025 07:16:11 -0800 X-CSE-ConnectionGUID: bviZ6KxzTBKFZEORJuB7qA== X-CSE-MsgGUID: VwK7v3k3SYeEve+g81JZqw== X-ExtLoop1: 1 X-IronPort-AV: E=Sophos;i="6.19,302,1754982000"; d="scan'208";a="194684640" Received: from black.igk.intel.com ([10.91.253.5]) by orviesa005.jf.intel.com with ESMTP; 13 Nov 2025 07:16:05 -0800 Received: by black.igk.intel.com (Postfix, from userid 1003) id AE7A996; Thu, 13 Nov 2025 16:16:04 +0100 (CET) From: Andy Shevchenko To: Andy Shevchenko , Bjorn Andersson , Stefan Wahren , Vinod Koul , Thomas Andreatta , Caleb Sander Mateos , dmaengine@vger.kernel.org, linux-kernel@vger.kernel.org, linux-rpi-kernel@lists.infradead.org, linux-arm-kernel@lists.infradead.org, linux-arm-msm@vger.kernel.org Cc: Olivier Dautricourt , Stefan Roese , Florian Fainelli , Broadcom internal kernel review list , Ray Jui , Scott Branden , Lars-Peter Clausen , Eugeniy Paltsev , Daniel Mack , Haojian Zhuang , Robert Jarzmik , Lizhi Hou , Brian Xu , Raj Kumar Rampelli , Michal Simek , Andrew Morton Subject: [PATCH v3 00/13] dmaengine: introduce sg_nents_for_dma() and convert users Date: Thu, 13 Nov 2025 16:12:56 +0100 Message-ID: <20251113151603.3031717-1-andriy.shevchenko@linux.intel.com> X-Mailer: git-send-email 2.50.1 MIME-Version: 1.0 Content-Transfer-Encoding: 8bit X-CRM114-Version: 20100106-BlameMichelson ( TRE 0.8.0 (BSD) ) MR-646709E3 X-CRM114-CacheID: sfid-20251113_071620_375348_EE9695BA X-CRM114-Status: UNSURE ( 8.94 ) X-CRM114-Notice: Please train this message. X-BeenThere: linux-arm-kernel@lists.infradead.org X-Mailman-Version: 2.1.34 Precedence: list List-Id: List-Unsubscribe: , List-Archive: List-Post: List-Help: List-Subscribe: , Sender: "linux-arm-kernel" Errors-To: linux-arm-kernel-bounces+linux-arm-kernel=archiver.kernel.org@lists.infradead.org A handful of the DMAengine drivers use same routine to calculate the number of SG entries needed for the given DMA transfer. Provide a common helper for them and convert. I left the new helper on SG level of API because brief grepping shows potential candidates outside of DMA engine, e.g.: drivers/crypto/chelsio/chcr_algo.c:154: nents += DIV_ROUND_UP(less, entlen); drivers/spi/spi-stm32.c:1495: /* Count the number of entries needed */ Changelog v3: - added missed EXPORT_SYMBOL() (Bjorn) - left the return type as signed int (as agreed with Bjorn) - collected tags (Bjorn) v2: <20251110103805.3562136-1-andriy.shevchenko@linux.intel.com> Changelog v2: - dropped outdated patches (only 9 years passed :-) - rebased on top of the current kernel - left API SG wide It might v1: https://patchwork.kernel.org/project/linux-dmaengine/patch/20161021173535.100245-1-andriy.shevchenko@linux.intel.com/ Andy Shevchenko (13): scatterlist: introduce sg_nents_for_dma() helper dmaengine: altera-msgdma: use sg_nents_for_dma() helper dmaengine: axi-dmac: use sg_nents_for_dma() helper dmaengine: bcm2835-dma: use sg_nents_for_dma() helper dmaengine: dw-axi-dmac: use sg_nents_for_dma() helper dmaengine: k3dma: use sg_nents_for_dma() helper dmaengine: lgm: use sg_nents_for_dma() helper dmaengine: pxa-dma: use sg_nents_for_dma() helper dmaengine: qcom: adm: use sg_nents_for_dma() helper dmaengine: qcom: bam_dma: use sg_nents_for_dma() helper dmaengine: sa11x0: use sg_nents_for_dma() helper dmaengine: sh: use sg_nents_for_dma() helper dmaengine: xilinx: xdma: use sg_nents_for_dma() helper drivers/dma/altera-msgdma.c | 5 ++-- drivers/dma/bcm2835-dma.c | 19 +------------- drivers/dma/dma-axi-dmac.c | 5 +--- .../dma/dw-axi-dmac/dw-axi-dmac-platform.c | 6 ++--- drivers/dma/k3dma.c | 9 ++----- drivers/dma/lgm/lgm-dma.c | 9 ++----- drivers/dma/pxa_dma.c | 5 ++-- drivers/dma/qcom/bam_dma.c | 9 ++----- drivers/dma/qcom/qcom_adm.c | 9 +++---- drivers/dma/sa11x0-dma.c | 6 ++--- drivers/dma/sh/shdma-base.c | 5 ++-- drivers/dma/xilinx/xdma.c | 6 ++--- include/linux/scatterlist.h | 2 ++ lib/scatterlist.c | 26 +++++++++++++++++++ 14 files changed, 52 insertions(+), 69 deletions(-) -- 2.50.1