From mboxrd@z Thu Jan 1 00:00:00 1970 Received: from mgamail.intel.com (mgamail.intel.com [192.198.163.9]) (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 49EDA3557F5; Thu, 13 Nov 2025 15:16:18 +0000 (UTC) Authentication-Results: smtp.subspace.kernel.org; arc=none smtp.client-ip=192.198.163.9 ARC-Seal:i=1; a=rsa-sha256; d=subspace.kernel.org; s=arc-20240116; t=1763046980; cv=none; b=hoKwg1Hz43nromqhrDhss/7khIfAzMSx2tcn9WYFwFXNRHhcf2ggIVDpQuE1q+T63z6ytgRVocaT79aBpgV6vuqBbO3s1PgF6KDO8P0hwaxAwV2Cl9Ala0fJEFIdDgk1Fh3grRuVhn2BOHrEZpIEWZOAV/nJqM4x1cgTg1B+emI= ARC-Message-Signature:i=1; a=rsa-sha256; d=subspace.kernel.org; s=arc-20240116; t=1763046980; c=relaxed/simple; bh=YgPrha/FWL+rx0Hr+rnyQmwA7SuU4BQbCsM9ur+PqQ4=; h=From:To:Cc:Subject:Date:Message-ID:MIME-Version; b=Iio+cqmXCM++Y07aqVmmyT9t/Zh+lM3FjwTp1jv174r5eteKCylHadPq+mrJVJX0VywS+BaIQNvcKH6eaxljZeX+hUwdN3kAc+U+iXt20wNJJFEw9penZHbmQqLNS49v2Sl5DZ9kpGaZM1/5zMVn9zL4cs1PfhQvOUx8S42fkys= 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=EnmetsOF; arc=none smtp.client-ip=192.198.163.9 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="EnmetsOF" DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/simple; d=intel.com; i=@intel.com; q=dns/txt; s=Intel; t=1763046978; x=1794582978; h=from:to:cc:subject:date:message-id:mime-version: content-transfer-encoding; bh=YgPrha/FWL+rx0Hr+rnyQmwA7SuU4BQbCsM9ur+PqQ4=; b=EnmetsOFkrMhnjqsZFPawIS8LrNbGsq6CEo6fLmzBbSQuXy0BzQJTklE kgduaTuFf5Nlv70+V4hNVh8w4+kQwNbhwfNzOJlwQL2+k4hNIH7qBtAme LpAmVQYz0KrU+FNMcJMXa58r4g3dx7qHXiqbbAOsbF5aC/NOMKLDkebDP hlHxZ2a7cuQ0dPmOt/xtYBttlf5n0C4IiWe0DEZ0pmtKWfwPHrRdeXlIk zGYHfzdEQerLZFVca2teih6+LYv6O9H84CDRmKp18v2rzq4UrsRaUQpod d6ZdE6R+LYdQFNv2RLeu5wJADKSgFYy7l3y4Mm1F1QF/gW/cBna5Q/+g1 w==; X-CSE-ConnectionGUID: Xtr1oeDOTt6IrASZofrMjA== X-CSE-MsgGUID: HdlVYgJDSvuYRamaF8arww== X-IronPort-AV: E=McAfee;i="6800,10657,11612"; a="75809634" X-IronPort-AV: E=Sophos;i="6.19,302,1754982000"; d="scan'208";a="75809634" 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 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 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