From mboxrd@z Thu Jan 1 00:00:00 1970 Received: from mgamail.intel.com (mgamail.intel.com [198.175.65.13]) (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 46ED43A4ACC; Thu, 8 Jan 2026 10:56:48 +0000 (UTC) Authentication-Results: smtp.subspace.kernel.org; arc=none smtp.client-ip=198.175.65.13 ARC-Seal:i=1; a=rsa-sha256; d=subspace.kernel.org; s=arc-20240116; t=1767869821; cv=none; b=gXb7wXbGnh6FoUXhInrm3M4fFwcLiOuS3FTk1yihfiVBhB8ruG91q8grssTJk+R94vktvIIMcoOpEiEwxpjmTh1V5jVzPdSK8E2iiEemcL/CPfV6ggQrcCmXm3OSQF9pgdQe8Spy0akFQBwsWpH+edopex6bqrwUols7s+hY/sY= ARC-Message-Signature:i=1; a=rsa-sha256; d=subspace.kernel.org; s=arc-20240116; t=1767869821; c=relaxed/simple; bh=R/veCd+MoZYz+/H4HoR6cR9O2PqmUFTICzNu+LpTN+o=; h=From:To:Cc:Subject:Date:Message-ID:MIME-Version; b=ctGqSrwaTLdkC1Gkhl4V/9tyT8AF4blei8tz2s8phghAEnlIVgK1Yi7wNB791tDA61gA/Wwov4OoKHBtQNA6JQ083AQlv/Vwu2v3vN24kWkJYUzzUAFpEQvzSh/+zAzS4Go/BvcpeA8MPR0gTL3Q+ayPC/d6CKSzX0Hbx8zTEy8= ARC-Authentication-Results:i=1; smtp.subspace.kernel.org; dmarc=pass (p=none dis=none) header.from=linux.intel.com; spf=pass smtp.mailfrom=linux.intel.com; dkim=pass (2048-bit key) header.d=intel.com header.i=@intel.com header.b=ndMGUbSV; arc=none smtp.client-ip=198.175.65.13 Authentication-Results: smtp.subspace.kernel.org; dmarc=pass (p=none dis=none) header.from=linux.intel.com Authentication-Results: smtp.subspace.kernel.org; spf=pass smtp.mailfrom=linux.intel.com Authentication-Results: smtp.subspace.kernel.org; dkim=pass (2048-bit key) header.d=intel.com header.i=@intel.com header.b="ndMGUbSV" DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/simple; d=intel.com; i=@intel.com; q=dns/txt; s=Intel; t=1767869814; x=1799405814; h=from:to:cc:subject:date:message-id:mime-version: content-transfer-encoding; bh=R/veCd+MoZYz+/H4HoR6cR9O2PqmUFTICzNu+LpTN+o=; b=ndMGUbSVLyNwuC06rTIJp0yIERQyjC+1yUbcbjno3ldJe0/CB4+A4d4H ixxrPcdKxM35kEM0R8lyjY2S7IKmf+bo/aYN10mw63Tk8Vz2CQ8qMeEnn DMhCVCic62X7oyIq3AW/u1Q8PYGpcFK9dXp9qFwtczYQRq7uHCBwFxRGA /5MeF6YYHWadpxeu6NnQKytB57SH2jMVCYKEnnM2MNQ8Ei6zuBp5oUE3H a9w45/K6EB9m77HDOb3RjXrmnxl8kaPut1xAZId9aHgpg27eYajnKtrRV qGJrfWHVcFtRdDFB8Eb+Tbet6OWzEiDU/+oFwWMWh7BwL+RwMr8fxwYls Q==; X-CSE-ConnectionGUID: OEw2tnupQJ+15WH4rRCS0g== X-CSE-MsgGUID: e3HQ+yLDT4ipJxb4WWIWSA== X-IronPort-AV: E=McAfee;i="6800,10657,11664"; a="80354590" X-IronPort-AV: E=Sophos;i="6.21,210,1763452800"; d="scan'208";a="80354590" Received: from fmviesa009.fm.intel.com ([10.60.135.149]) by orvoesa105.jf.intel.com with ESMTP/TLS/ECDHE-RSA-AES256-GCM-SHA384; 08 Jan 2026 02:56:28 -0800 X-CSE-ConnectionGUID: TLQoBmzxTyqlR0Bd+co+kQ== X-CSE-MsgGUID: q8cFpDAKSr2AxYqPiM0Nmw== X-ExtLoop1: 1 X-IronPort-AV: E=Sophos;i="6.21,210,1763452800"; d="scan'208";a="203615538" Received: from black.igk.intel.com ([10.91.253.5]) by fmviesa009.fm.intel.com with ESMTP; 08 Jan 2026 02:56:21 -0800 Received: by black.igk.intel.com (Postfix, from userid 1003) id 3DE2E98; Thu, 08 Jan 2026 11:56:20 +0100 (CET) From: Andy Shevchenko To: Bjorn Andersson , Andy Shevchenko , =?UTF-8?q?Nuno=20S=C3=A1?= , Vinod Koul , Bartosz Golaszewski , 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 v5 00/13] dmaengine: introduce sg_nents_for_dma() and convert users Date: Thu, 8 Jan 2026 11:50:11 +0100 Message-ID: <20260108105619.3513561-1-andriy.shevchenko@linux.intel.com> X-Mailer: git-send-email 2.50.1 Precedence: bulk X-Mailing-List: dmaengine@vger.kernel.org List-Id: List-Subscribe: List-Unsubscribe: MIME-Version: 1.0 Content-Transfer-Encoding: 8bit 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 v5: - fixed W=1 warning (Vinod) - `make W=1` the whole folder in allyesconfig and allmodconfig configurations v4: <20251124121202.424072-1-andriy.shevchenko@linux.intel.com> Changelog v4: - fixed compilation errors (Vinod) v3: <20251113151603.3031717-1-andriy.shevchenko@linux.intel.com> 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/ *** BLURB HERE *** 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 | 6 ++--- 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(+), 70 deletions(-) -- 2.50.1