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 9101DCFD317 for ; Mon, 24 Nov 2025 12:12:37 +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=nDxUwjydiWIYOEMuVqGywF/OupE9o02aAFnZCHKil3o=; b=HUiYB3bxaCzopAfGBKHTldUvQp 3C+n628OGOEGcDjs09TtPBiG7Uoe9XNqHQ0etQNZA71TAQnTi33XlDJrhxQNavYnyjYqQJ1JzsDTu Geevkac0fIJyCfKgqvugCWUxBqMY2YRnE7DUM8geRGm8tZw2l03u7YY5IF9h48i3zmy5cNVGsoSui we84ady8hSIT7xGECKH0s4Qkj16uIzBYgcf8hNzigeSGKOkpo/oVgDDF+5fLecIz7Qr/9z9hIKnE7 wr7wRd+yvaZZHoPANVVkzsld4c6RDgVQTqduoGb2LmS1IUdZa43YIjH2tYtb6yxZikgaT3vYOnEs+ cyJIUS8w==; Received: from localhost ([::1] helo=bombadil.infradead.org) by bombadil.infradead.org with esmtp (Exim 4.98.2 #2 (Red Hat Linux)) id 1vNVQm-0000000Bcbq-1Qyq; Mon, 24 Nov 2025 12:12:32 +0000 Received: from mgamail.intel.com ([192.198.163.12]) by bombadil.infradead.org with esmtps (Exim 4.98.2 #2 (Red Hat Linux)) id 1vNVQT-0000000BcPH-1yUp; Mon, 24 Nov 2025 12:12:14 +0000 DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/simple; d=intel.com; i=@intel.com; q=dns/txt; s=Intel; t=1763986333; x=1795522333; h=from:to:cc:subject:date:message-id:mime-version: content-transfer-encoding; bh=VbgYR7rJ09xzyKkM2zSKZNmY3X4tqd/TmXvi9Q2VLzw=; b=aNUPO9TQnrGCqoUSUolQRKdK8NkoPLDYMj3e+AIiBcedh+yNa46L5Hht xqaZHBrrT0B5/NIbRFE/Z0xVNctgFfO/sCuGndpqYppOacVkGJQKpJDMA VY8lUuYu3HUXXOZqQF0l0UBn6IJ54NKouPXT0a54vgnAZ2F+XuKsn1d/b +2pkwYrJIvdBzMxZyK05Ds7PTbEa+O/d2ZST3mhntQ1pXD+DgmGZL+WZl 4+OhER2sqKmqjaY/6kTZJW99hLOjb7ywf+uoxHe1C0Oa5xxEf2qQlRbKL PCo7jR7DVIblCnT+BwLYbVlDxKJ4dhfYIxrnKLDkrKc2/RwTGXqIRNvpd w==; X-CSE-ConnectionGUID: T5Utw3lTSsGeK0uLPdfF/g== X-CSE-MsgGUID: ZKd51hBYTIiGqX57ekEdRQ== X-IronPort-AV: E=McAfee;i="6800,10657,11622"; a="69847535" X-IronPort-AV: E=Sophos;i="6.20,222,1758610800"; d="scan'208";a="69847535" Received: from orviesa002.jf.intel.com ([10.64.159.142]) by fmvoesa106.fm.intel.com with ESMTP/TLS/ECDHE-RSA-AES256-GCM-SHA384; 24 Nov 2025 04:12:09 -0800 X-CSE-ConnectionGUID: 83r+lxHpRIaFo44hbpipxw== X-CSE-MsgGUID: jmYxulCUSdORUvLiN/9xPA== X-ExtLoop1: 1 X-IronPort-AV: E=Sophos;i="6.20,222,1758610800"; d="scan'208";a="222970325" Received: from black.igk.intel.com ([10.91.253.5]) by orviesa002.jf.intel.com with ESMTP; 24 Nov 2025 04:12:04 -0800 Received: by black.igk.intel.com (Postfix, from userid 1003) id 45B41A0; Mon, 24 Nov 2025 13:12:03 +0100 (CET) From: Andy Shevchenko To: Bjorn Andersson , 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 , Ray Jui , Scott Branden , Broadcom internal kernel review list , Lars-Peter Clausen , Eugeniy Paltsev , Daniel Mack , Haojian Zhuang , Robert Jarzmik , Lizhi Hou , Brian Xu , Raj Kumar Rampelli , Michal Simek , Andrew Morton Subject: [PATCH v4 0/13] dmaengine: introduce sg_nents_for_dma() and convert users Date: Mon, 24 Nov 2025 13:09:18 +0100 Message-ID: <20251124121202.424072-1-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-20251124_041213_535922_3ACD5FC1 X-CRM114-Status: UNSURE ( 9.27 ) 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 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/ 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