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 B3794E9270E for ; Sat, 27 Dec 2025 20:14:19 +0000 (UTC) DKIM-Signature: v=1; a=rsa-sha256; q=dns/txt; c=relaxed/relaxed; d=lists.infradead.org; s=bombadil.20210309; h=Sender:Cc:List-Subscribe: List-Help:List-Post:List-Archive:List-Unsubscribe:List-Id:In-Reply-To: Content-Type:MIME-Version:References:Message-ID:Subject:To:From:Date:Reply-To :Content-Transfer-Encoding:Content-ID:Content-Description:Resent-Date: Resent-From:Resent-Sender:Resent-To:Resent-Cc:Resent-Message-ID:List-Owner; bh=6qhT//OCVKwyR6gueWyV5xzfqvrNG0O1tZL6g1T1Z9M=; b=wP7BOWJufuyvam07lS4gH+HLQx wx+Ow2V70HbI92hVhlJw6UHABwyzoyfvfBXbCF3M51gecF8syyjful/1h/r1SjXK5kNvnyj1aVdGc fG7Nwg2cf5g2XXYIbY3B0IAuuqMnhJAa05zEqM/dgMHmP5Jc3Oc54GotEhk3mamV/Sa9sQcDtpVrh Pt9tX/fpCYmBCuYIaqxyNNRVwkbp0a4GKaMbQoErJ4TS7sDiNdeOIM2mCyI0OY5bwI2WQTWgzjY2e JXV3Jzl/IgtROXSwOfJlkHWDpTuaPXUxs2UQ0JtdhXGbJq5yeNAguCOMBHT6ZBbyFDowxqkUpznqQ YGENEGoQ==; Received: from localhost ([::1] helo=bombadil.infradead.org) by bombadil.infradead.org with esmtp (Exim 4.98.2 #2 (Red Hat Linux)) id 1vZag1-00000002Biq-16Er; Sat, 27 Dec 2025 20:14:13 +0000 Received: from sea.source.kernel.org ([172.234.252.31]) by bombadil.infradead.org with esmtps (Exim 4.98.2 #2 (Red Hat Linux)) id 1vZafy-00000002BiT-2AUA for linux-arm-kernel@lists.infradead.org; Sat, 27 Dec 2025 20:14:11 +0000 Received: from smtp.kernel.org (transwarp.subspace.kernel.org [100.75.92.58]) by sea.source.kernel.org (Postfix) with ESMTP id E7B164082A; Sat, 27 Dec 2025 20:14:09 +0000 (UTC) Received: by smtp.kernel.org (Postfix) with ESMTPSA id 32314C4CEF1; Sat, 27 Dec 2025 20:14:08 +0000 (UTC) DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/simple; d=kernel.org; s=k20201202; t=1766866449; bh=5BvZzNPtiik1Rf2hGQJZuruUvtsWoa36oLJFsqbPeIg=; h=Date:From:To:Cc:Subject:References:In-Reply-To:From; b=j8mX/F/qNxveAViAw3M67+ZlSkxoNkRKoE+i7UiDr/K8/lElkqvuc9vkn65DJgg01 pF5Pb5lIKx8k8SBZHzueiJEkrfAz9wVBYC3qQhGt74fNQZUGCOWAUc01JwaEYXMdpM FJit8Tv20CSZzdYdRg0UZB+Yo9Gdf3qhLW7C+ke6SKiJj1zsi7T5LNOYlCoMCpxGoE n5D4Asm3R6CzLphE/Xh5kr1cHps3f5Rhemo2HeOJTBRXD1DzwfYcZIWAAXNYWEBlih bSMq1kRI2kpZ5c18WLkXj+BEo8HgxpRnn/JvRkD8SEbP8nnzGwzQaYj+Higdc0Svrv VyCS4ZKkgq3bA== Date: Sat, 27 Dec 2025 22:14:06 +0200 From: Leon Romanovsky To: Barry Song <21cnbao@gmail.com> Subject: Re: [PATCH v2 6/8] dma-mapping: Support batch mode for dma_direct_{map,unmap}_sg Message-ID: <20251227201406.GP11869@unreal> References: <20251226225254.46197-1-21cnbao@gmail.com> <20251226225254.46197-7-21cnbao@gmail.com> MIME-Version: 1.0 Content-Type: text/plain; charset=us-ascii Content-Disposition: inline In-Reply-To: <20251226225254.46197-7-21cnbao@gmail.com> X-CRM114-Version: 20100106-BlameMichelson ( TRE 0.8.0 (BSD) ) MR-646709E3 X-CRM114-CacheID: sfid-20251227_121410_575461_231DAAEA X-CRM114-Status: GOOD ( 11.10 ) 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: , Cc: Tangquan Zheng , Barry Song , Ryan Roberts , will@kernel.org, Anshuman Khandual , catalin.marinas@arm.com, linux-kernel@vger.kernel.org, Suren Baghdasaryan , iommu@lists.linux.dev, Marc Zyngier , xen-devel@lists.xenproject.org, robin.murphy@arm.com, Ard Biesheuvel , linux-arm-kernel@lists.infradead.org, m.szyprowski@samsung.com Sender: "linux-arm-kernel" Errors-To: linux-arm-kernel-bounces+linux-arm-kernel=archiver.kernel.org@lists.infradead.org On Sat, Dec 27, 2025 at 11:52:46AM +1300, Barry Song wrote: > From: Barry Song > > Leon suggested extending a flush argument to Let's move this sentence out of the commit message and place it in the changelog instead. > dma_direct_unmap_phys(), dma_direct_map_phys(), and > dma_direct_sync_single_for_cpu(). For single-buffer cases, this > would use flush=true, while for SG cases flush=false would be > used, followed by a single flush after all cache operations are > issued in dma_direct_{map,unmap}_sg(). > > This ultimately benefits dma_map_sg() and dma_unmap_sg(). > > Cc: Leon Romanovsky > Cc: Catalin Marinas > Cc: Will Deacon > Cc: Marek Szyprowski > Cc: Robin Murphy > Cc: Ada Couprie Diaz > Cc: Ard Biesheuvel > Cc: Marc Zyngier > Cc: Anshuman Khandual > Cc: Ryan Roberts > Cc: Suren Baghdasaryan > Cc: Tangquan Zheng > Signed-off-by: Barry Song > --- > kernel/dma/direct.c | 17 +++++++++++++---- > kernel/dma/direct.h | 16 ++++++++++------ > kernel/dma/mapping.c | 6 +++--- > 3 files changed, 26 insertions(+), 13 deletions(-) Thanks, Reviewed-by: Leon Romanovsky