From mboxrd@z Thu Jan 1 00:00:00 1970 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 B47CF3054F9; Mon, 10 Nov 2025 10:38:14 +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=1762771096; cv=none; b=K5GUHYZMr2xhjg9+7EBEIYKcOgFaIiLesuGtluBQ9Oj/EBYLjQOueLRUpnU5QrpYMduTyw0rZ4Rs5wNhi1SbPaEsouoSYeplVquWe9RFFHShNt2YkYrroLZbuQpnS2rL2ZbgxpCbwGsQOzr3AyPPO40FAWqnEtGtlqvgCOag/Bc= ARC-Message-Signature:i=1; a=rsa-sha256; d=subspace.kernel.org; s=arc-20240116; t=1762771096; c=relaxed/simple; bh=MA2w2954CQGJIRmHnMHNUgOD+5NH8IaZPPzHHdoj9ZY=; h=From:To:Cc:Subject:Date:Message-ID:MIME-Version; b=lfqnVGC6I/BhPQJYGbNbsGRj4CmG6SVD9g2bnSUGU9CajGJ0Xsp2UaVAI0HFh+Q0I+38c+ddmxieKu+Qce0u6PnK5b02xK/jbz9ocRjfPddIg52hAA2hrHIkyZ3fByB5DsvVeGXmUtGNwBnP6ow2BgXdidWmV0rQ8UORgiTJCcI= 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=ES5FM1/W; arc=none smtp.client-ip=192.198.163.13 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="ES5FM1/W" DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/simple; d=intel.com; i=@intel.com; q=dns/txt; s=Intel; t=1762771095; x=1794307095; h=from:to:cc:subject:date:message-id:mime-version: content-transfer-encoding; bh=MA2w2954CQGJIRmHnMHNUgOD+5NH8IaZPPzHHdoj9ZY=; b=ES5FM1/W7Y4gkwBKzJq/6isKgNF2IqR3QOHBaX+Y2Sidp4SNpbXw1QBE A+/uP0jJX1VZXNdV/kjPlH2frfxseEkNSt002tpnrfmLBXL/ELeuhr1ca /VPkPB8Lcu0LHu8jbv9r/xgqLR6A64g63sVaylKnP0P43vuKbZVUu/Fxn CRbnrw5pOMcg0WqYkItCbS788JzRB1XqVVrL6z/bGH8qg1CpaYO9uo3nw 8trJZbBgjQdRrDbzNOmvp6xLmJO9qALwpeZqzwW4giIOVNcLF0lE9rh28 Q73yKmMoWh2+YFkOVlYWR3Fbs6uxQjt/xk58XO0QpEWT2cB7LuCAIWF1u A==; X-CSE-ConnectionGUID: WEOKg78YTY+DG9GsIMxmSw== X-CSE-MsgGUID: /ysWyG7OQWKmBhMZKvd3xg== X-IronPort-AV: E=McAfee;i="6800,10657,11608"; a="67425217" X-IronPort-AV: E=Sophos;i="6.19,293,1754982000"; d="scan'208";a="67425217" Received: from orviesa004.jf.intel.com ([10.64.159.144]) by fmvoesa107.fm.intel.com with ESMTP/TLS/ECDHE-RSA-AES256-GCM-SHA384; 10 Nov 2025 02:38:14 -0800 X-CSE-ConnectionGUID: Nmq1xKwAT2+kb5s6LTy5lQ== X-CSE-MsgGUID: gUCneLtCQyKQPHfLplfDew== X-ExtLoop1: 1 X-IronPort-AV: E=Sophos;i="6.19,293,1754982000"; d="scan'208";a="193026293" Received: from black.igk.intel.com ([10.91.253.5]) by orviesa004.jf.intel.com with ESMTP; 10 Nov 2025 02:38:08 -0800 Received: by black.igk.intel.com (Postfix, from userid 1003) id 65D1895; Mon, 10 Nov 2025 11:38:07 +0100 (CET) From: Andy Shevchenko To: Andy Shevchenko , 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 v2 00/13] dmaengine: introduce sg_nents_for_dma() and convert users Date: Mon, 10 Nov 2025 11:23:27 +0100 Message-ID: <20251110103805.3562136-1-andriy.shevchenko@linux.intel.com> X-Mailer: git-send-email 2.50.1 Precedence: bulk X-Mailing-List: linux-arm-msm@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 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 | 25 +++++++++++++++++++ 14 files changed, 51 insertions(+), 69 deletions(-) -- 2.50.1