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 kanga.kvack.org (kanga.kvack.org [205.233.56.17]) by smtp.lore.kernel.org (Postfix) with ESMTP id 14E93C369C2 for ; Mon, 5 May 2025 07:02:25 +0000 (UTC) Received: by kanga.kvack.org (Postfix) id 306DA6B009C; Mon, 5 May 2025 03:02:23 -0400 (EDT) Received: by kanga.kvack.org (Postfix, from userid 40) id 28E746B009D; Mon, 5 May 2025 03:02:23 -0400 (EDT) X-Delivered-To: int-list-linux-mm@kvack.org Received: by kanga.kvack.org (Postfix, from userid 63042) id 0BAB96B009E; Mon, 5 May 2025 03:02:23 -0400 (EDT) X-Delivered-To: linux-mm@kvack.org Received: from relay.hostedemail.com (smtprelay0010.hostedemail.com [216.40.44.10]) by kanga.kvack.org (Postfix) with ESMTP id DADF36B009C for ; Mon, 5 May 2025 03:02:22 -0400 (EDT) Received: from smtpin17.hostedemail.com (a10.router.float.18 [10.200.18.1]) by unirelay04.hostedemail.com (Postfix) with ESMTP id CC6971A1ACB for ; Mon, 5 May 2025 07:02:23 +0000 (UTC) X-FDA: 83407960566.17.0E03756 Received: from nyc.source.kernel.org (nyc.source.kernel.org [147.75.193.91]) by imf25.hostedemail.com (Postfix) with ESMTP id 468ECA0003 for ; Mon, 5 May 2025 07:02:22 +0000 (UTC) Authentication-Results: imf25.hostedemail.com; dkim=pass header.d=kernel.org header.s=k20201202 header.b=koIjUkdj; spf=pass (imf25.hostedemail.com: domain of leon@kernel.org designates 147.75.193.91 as permitted sender) smtp.mailfrom=leon@kernel.org; dmarc=pass (policy=quarantine) header.from=kernel.org ARC-Message-Signature: i=1; a=rsa-sha256; c=relaxed/relaxed; d=hostedemail.com; s=arc-20220608; t=1746428542; h=from:from:sender:reply-to:subject:subject:date:date: message-id:message-id:to:to:cc:cc:mime-version:mime-version: content-type:content-transfer-encoding:content-transfer-encoding: in-reply-to:in-reply-to:references:references:dkim-signature; bh=kr9SnO9uryvE9kabcqMcYUFtA/SVe6z8s0CmQmq1Jcg=; b=n739TDHIuMZqTYUtqON3b56BVL5+Ii+CLsbW/Y7rd53YRf/rV5spnHNKy93LzvPX/Q4evO GnedKtNL7JUpxfPeSbfindpdMgOWSW9AYUiho2Ort/nmYsfr5Ch/ROl2tw9dSAAdmm9jkZ 90TMYLXLQ/no+m+kA23msieCHpgFy6Q= ARC-Authentication-Results: i=1; imf25.hostedemail.com; dkim=pass header.d=kernel.org header.s=k20201202 header.b=koIjUkdj; spf=pass (imf25.hostedemail.com: domain of leon@kernel.org designates 147.75.193.91 as permitted sender) smtp.mailfrom=leon@kernel.org; dmarc=pass (policy=quarantine) header.from=kernel.org ARC-Seal: i=1; s=arc-20220608; d=hostedemail.com; t=1746428542; a=rsa-sha256; cv=none; b=ML9ylnVPhtBo10BX8C0nurJY1RQirRhub80g44WfbURT5HMrFQNtif95atfyIh+czUXfaS mMTatD7i5iRAzDyOfy7k0uldrAnD2Q8y/2IIKLsMPCkxm4aD0hUvUDUH93cr0h4Fyw+Nog wtuSXE2E4/1OKggwRFU785/FShlwGX0= Received: from smtp.kernel.org (transwarp.subspace.kernel.org [100.75.92.58]) by nyc.source.kernel.org (Postfix) with ESMTP id 18812A4C5F4; Mon, 5 May 2025 06:56:54 +0000 (UTC) Received: by smtp.kernel.org (Postfix) with ESMTPSA id 7FBF8C4CEE4; Mon, 5 May 2025 07:02:20 +0000 (UTC) DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/simple; d=kernel.org; s=k20201202; t=1746428541; bh=IJofnoNmHQxgrT5KEQtJlhLI7w0UbAaAkqcCSrH3C0w=; h=From:To:Cc:Subject:Date:In-Reply-To:References:From; b=koIjUkdjseN17qIdTillVBxxTU12WgfbLBLnPhJv+cIP1nNZVR/W4O4kk84lrol0+ NP9ak5VHjxDx7vaYw90ux3V3L+MIjgNdOxgputMMfmao8yjC37iQuxHpmYI7FQwbt3 DG1erHZhY4F5KQA4yCmapa2FSDPhNVhpOTSbwc6J16rV9Vi6pAtg6AbC+l//X/AWYu SXLp2SMsB4Yb5gO66XMDoILFdNYhrJ07NV9ptVvdD3CLzFdqMxhiYfD6TQGibqSjvD 3wkWpjNVwfQN1mm5CaqJ6joe+M7FqqT6tXdaaMKCekTKw6EG9T949sfmZlakhHqG/T M4XxxJBKnf18g== From: Leon Romanovsky To: Cc: Leon Romanovsky , Jens Axboe , Christoph Hellwig , Keith Busch , Jake Edge , Jonathan Corbet , Jason Gunthorpe , Zhu Yanjun , Robin Murphy , Joerg Roedel , Will Deacon , Sagi Grimberg , Bjorn Helgaas , Logan Gunthorpe , Yishai Hadas , Shameer Kolothum , Kevin Tian , Alex Williamson , =?UTF-8?q?J=C3=A9r=C3=B4me=20Glisse?= , Andrew Morton , linux-doc@vger.kernel.org, linux-kernel@vger.kernel.org, linux-block@vger.kernel.org, linux-rdma@vger.kernel.org, iommu@lists.linux.dev, linux-nvme@lists.infradead.org, linux-pci@vger.kernel.org, kvm@vger.kernel.org, linux-mm@kvack.org, Niklas Schnelle , Chuck Lever , Luis Chamberlain , Matthew Wilcox , Dan Williams , Kanchan Joshi , Chaitanya Kulkarni , Jason Gunthorpe , Lu Baolu Subject: [PATCH v11 4/9] iommu: add kernel-doc for iommu_unmap_fast Date: Mon, 5 May 2025 10:01:41 +0300 Message-ID: <7535d8f4364c5413293bb963c41f18298d2344d0.1746424934.git.leon@kernel.org> X-Mailer: git-send-email 2.49.0 In-Reply-To: References: MIME-Version: 1.0 Content-Transfer-Encoding: 8bit X-Rspam-User: X-Rspamd-Server: rspam09 X-Rspamd-Queue-Id: 468ECA0003 X-Stat-Signature: bmwyj87frhrgkbtbn34si9rzkynkk9zo X-HE-Tag: 1746428542-750675 X-HE-Meta: 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 O8aURS9W fXQJ6IkKuj0ZPG5k6SrNFHiWUJZKe9of1s/NQ2pfckLKOWbrW20CxntEjBJ5iSi+WNGKZNfg40lUdqtpDe1ieaWGqtf9s3lLJ5RbEEJu/NHqP501O2HBJti274XQMObcQUlc35Ko00dTF04XTl0rC/fLHberwSlHyK3G3GwzfAUAj4Vm69Bi7Xgi8f/+Qg6KgQfjPemP2EIsm6CjNKzQ7Gic0fhXCEypzBkWOlPisI1jlJlrIZ6Y7yefeSl6nRkOQYohNx2Um1RnrManDFa9wwFMdzmCs7kxmAEv1r9TQ4XXGUU2Ia73lhJMbew1wE0PDYfMJoNq3D0msS1M= X-Bogosity: Ham, tests=bogofilter, spamicity=0.000000, version=1.2.4 Sender: owner-linux-mm@kvack.org Precedence: bulk X-Loop: owner-majordomo@kvack.org List-ID: List-Subscribe: List-Unsubscribe: From: Leon Romanovsky Add kernel-doc section for iommu_unmap_fast to document existing limitation of underlying functions which can't split individual ranges. Suggested-by: Jason Gunthorpe Acked-by: Will Deacon Reviewed-by: Christoph Hellwig Tested-by: Jens Axboe Reviewed-by: Jason Gunthorpe Reviewed-by: Luis Chamberlain Reviewed-by: Lu Baolu Signed-off-by: Leon Romanovsky --- drivers/iommu/iommu.c | 19 +++++++++++++++++++ 1 file changed, 19 insertions(+) diff --git a/drivers/iommu/iommu.c b/drivers/iommu/iommu.c index 02960585b8d4..8619c355ef9c 100644 --- a/drivers/iommu/iommu.c +++ b/drivers/iommu/iommu.c @@ -2621,6 +2621,25 @@ size_t iommu_unmap(struct iommu_domain *domain, } EXPORT_SYMBOL_GPL(iommu_unmap); +/** + * iommu_unmap_fast() - Remove mappings from a range of IOVA without IOTLB sync + * @domain: Domain to manipulate + * @iova: IO virtual address to start + * @size: Length of the range starting from @iova + * @iotlb_gather: range information for a pending IOTLB flush + * + * iommu_unmap_fast() will remove a translation created by iommu_map(). + * It can't subdivide a mapping created by iommu_map(), so it should be + * called with IOVA ranges that match what was passed to iommu_map(). The + * range can aggregate contiguous iommu_map() calls so long as no individual + * range is split. + * + * Basically iommu_unmap_fast() is the same as iommu_unmap() but for callers + * which manage the IOTLB flushing externally to perform a batched sync. + * + * Returns: Number of bytes of IOVA unmapped. iova + res will be the point + * unmapping stopped. + */ size_t iommu_unmap_fast(struct iommu_domain *domain, unsigned long iova, size_t size, struct iommu_iotlb_gather *iotlb_gather) -- 2.49.0