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]) (using TLSv1 with cipher DHE-RSA-AES256-SHA (256/256 bits)) (No client certificate requested) by smtp.lore.kernel.org (Postfix) with ESMTPS id 19784C44508 for ; Wed, 8 Jul 2026 23:49:06 +0000 (UTC) Received: by kanga.kvack.org (Postfix) id 735D56B008C; Wed, 8 Jul 2026 19:49:00 -0400 (EDT) Received: by kanga.kvack.org (Postfix, from userid 40) id 70D9B6B0092; Wed, 8 Jul 2026 19:49:00 -0400 (EDT) X-Delivered-To: int-list-linux-mm@kvack.org Received: by kanga.kvack.org (Postfix, from userid 63042) id 624206B0093; Wed, 8 Jul 2026 19:49:00 -0400 (EDT) X-Delivered-To: linux-mm@kvack.org Received: from relay.hostedemail.com (smtprelay0017.hostedemail.com [216.40.44.17]) by kanga.kvack.org (Postfix) with ESMTP id 3472F6B008C for ; Wed, 8 Jul 2026 19:49:00 -0400 (EDT) Received: from smtpin28.hostedemail.com (lb01a-stub [10.200.18.249]) by unirelay07.hostedemail.com (Postfix) with ESMTP id 91C84168BEE for ; Wed, 8 Jul 2026 23:48:59 +0000 (UTC) X-FDA: 84967252398.28.AE732FB Received: from mail-pf1-f201.google.com (mail-pf1-f201.google.com [209.85.210.201]) by imf22.hostedemail.com (Postfix) with ESMTP id DE934C000B for ; Wed, 8 Jul 2026 23:48:57 +0000 (UTC) Authentication-Results: imf22.hostedemail.com; dkim=pass header.d=google.com header.s=20251104 header.b="nmXoiJ/0"; dmarc=pass (policy=reject) header.from=google.com; spf=pass (imf22.hostedemail.com: domain of 36OFOaggKCEEvnkdzdmdjrrjoh.frpolqx0-ppnydfn.ruj@flex--skhawaja.bounces.google.com designates 209.85.210.201 as permitted sender) smtp.mailfrom=36OFOaggKCEEvnkdzdmdjrrjoh.frpolqx0-ppnydfn.ruj@flex--skhawaja.bounces.google.com ARC-Message-Signature: i=1; a=rsa-sha256; c=relaxed/relaxed; d=hostedemail.com; s=arc-20220608; t=1783554537; 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-type:content-transfer-encoding: in-reply-to:in-reply-to:references:references:dkim-signature; bh=aFhl1KlUjTv27006fhIt6b3pOPGmn7+PIUCxNMQiXPw=; b=uzoUxHpO79HpQEV0QkvRDmLd8VA5LeOIGAiznqU6YbcoGVo7Fl1QMOCPmhiGq9pMOwPPKk HrwY3F0BsZIuwlLa5si972ONr3lluwUgDgYyERyt6Jk/oQ0tpRP2yPMN64qf8h9tYQEIuE 8lnE48F6YTT5qTWs/Kgmn9CRyE7Aqks= ARC-Authentication-Results: i=1; imf22.hostedemail.com; dkim=pass header.d=google.com header.s=20251104 header.b="nmXoiJ/0"; dmarc=pass (policy=reject) header.from=google.com; spf=pass (imf22.hostedemail.com: domain of 36OFOaggKCEEvnkdzdmdjrrjoh.frpolqx0-ppnydfn.ruj@flex--skhawaja.bounces.google.com designates 209.85.210.201 as permitted sender) smtp.mailfrom=36OFOaggKCEEvnkdzdmdjrrjoh.frpolqx0-ppnydfn.ruj@flex--skhawaja.bounces.google.com ARC-Seal: i=1; a=rsa-sha256; d=hostedemail.com; s=arc-20220608; cv=none; t=1783554537; b=XL1Gdrg6MYifaHQF+XPWi7tmm6ZlnBJmWOk5yI3om6RC4xqxuV5xzlM8IEBldaNNlQsTsI M/KklbHhHmyrb69PlcVO1gvnzecDu3PKerja0cb96swJj7DHsqhbXkCbkK2zFvSAn61/KZ xuhRGTy+SgXmNzSKzfCM916SfyqdJfU= Received: by mail-pf1-f201.google.com with SMTP id d2e1a72fcca58-84770f89b99so436191b3a.1 for ; Wed, 08 Jul 2026 16:48:57 -0700 (PDT) DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=google.com; s=20251104; t=1783554537; x=1784159337; darn=kvack.org; h=content-type:cc:to:from:subject:message-id:references:mime-version :in-reply-to:date:from:to:cc:subject:date:message-id:reply-to :content-type; bh=aFhl1KlUjTv27006fhIt6b3pOPGmn7+PIUCxNMQiXPw=; b=nmXoiJ/0zbqIGmJSbgn4DUYHXAWuTym1hHqasVdtQZGxvlOgkQj4g8fh/UL9WlFJWk oV8miPvF4LCHqq35N+UgFCGO/Af9XkxfFm9g4G0N0l3ov1rFUCRt15C1cBTQXYAvWaab 1P9LQokH53WyKR4SPx3ggqeKOWhJEtVN2WO3j/gsWNy1fFt2QHHMg4NE3ENh51jzjMEh 4abbpQXioxbExlWfrHHLBtwwB4IXlWv8ICRjPqjn9Wn2wMw5ug+sEMwME7o8QrDLbXeq t6BFFFsxJGNgTga6cJ9lctUZjBNysJs5jIXibirtoeTBzd6o20dgLCUB+2vldroO84y6 sAtQ== X-Google-DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=1e100.net; s=20251104; t=1783554537; x=1784159337; h=content-type:cc:to:from:subject:message-id:references:mime-version :in-reply-to:date:x-gm-message-state:from:to:cc:subject:date :message-id:reply-to:content-type; bh=aFhl1KlUjTv27006fhIt6b3pOPGmn7+PIUCxNMQiXPw=; b=dr0Ey50DUot8SyAp5pok8ir6qIOokUivNZIy675e/WI90YY/LiIlNbuLkYG2nHOiJ2 1z/oauEWiGqnSZ4t+ZRMaWdLxrB5JxefVmPxM2Hy46rO4F18Xjb2dC8QhZcNqMKDQhOY RBT9vfoPmibHXRn/a2/f1Z+sp3ASPJfrQYZ37PIEssTRuAOGr2JMboZSqVBhMD9Wy0nM ci+AMImds7VVAl3BtvjOmbwKakgWePL8yJl/s8im4oz/UpLW6JP5qdFEUQQ62LX9rTvd RXR36VnrGhkjOt6AfSIfmtbYIrtyc0k6MbSGsFBoG/MXLQZtvYeQAzqvNC327rCCdPAS lxXQ== X-Forwarded-Encrypted: i=1; AHgh+RoRd/ckrDt6ox7BjR1sIV2kysEhbmzPE+vrMRgw8INxGzONabx0Dp7WsPdulqZp9vr8ydBxatrO4Q==@kvack.org X-Gm-Message-State: AOJu0Yycc/atRHPTZe/UX3+Rlob2njVF4tPnyhN4mNyHOZFeAJqp6/UM YHBYyKfaa7TsmjuYm+7raW54B5KquZ9z3vAR+ryHfzDPx/GTlHk/KzdbZe7Zkn6rs7A0LtSApLu VQC5rc6uyx0RznA== X-Received: from pfcp8.prod.google.com ([2002:a05:6a00:a248:b0:848:4e44:7f19]) (user=skhawaja job=prod-delivery.src-stubby-dispatcher) by 2002:a05:6a00:3e12:b0:848:411f:3969 with SMTP id d2e1a72fcca58-84842ee66f7mr4071344b3a.20.1783554536532; Wed, 08 Jul 2026 16:48:56 -0700 (PDT) Date: Wed, 8 Jul 2026 23:48:46 +0000 In-Reply-To: <20260708234854.4044652-1-skhawaja@google.com> Mime-Version: 1.0 References: <20260708234854.4044652-1-skhawaja@google.com> X-Mailer: git-send-email 2.55.0.795.g602f6c329a-goog Message-ID: <20260708234854.4044652-3-skhawaja@google.com> Subject: [RFC PATCH v2 02/10] dma/pool: Add an API to check if DMA allocation is from pool From: Samiullah Khawaja To: Marek Szyprowski , Will Deacon , Jason Gunthorpe Cc: Samiullah Khawaja , Pasha Tatashin , Mike Rapoport , Pratyush Yadav , Alexander Graf , Robin Murphy , Kevin Tian , iommu@lists.linux.dev, kexec@lists.infradead.org, linux-mm@kvack.org, linux-kernel@vger.kernel.org, David Matlack , Andrew Morton , Pranjal Shrivastava , Vipin Sharma Content-Type: text/plain; charset="UTF-8" X-Rspam-User: X-Rspamd-Server: rspam09 X-Rspamd-Queue-Id: DE934C000B X-Stat-Signature: 5uoe1jdmgkezzf4j31ka6yt6c3kxsnzr X-HE-Tag: 1783554537-41370 X-HE-Meta: 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 F+Y2tT9X Uo5pIb1ilAwd/1xgeCicx+35wwxKPMrDw/lMtDa5GsR81ZJzRWst94tkvB3KCaJm3tkl55UTtjQjTaMEio+B2Ow/6SpObowqk+Ww5T7cSnJ4v08gi8cPoCMJUQUWyd9WkeAt3pF+Trat8zy1b5eZTsfP3fQUb1+rAWhV2OqwZuZ7Z+1KldFA15oSPph4ptAiC3MI0UoEiYfwY+7EQHB9NcQi3C8qFmf9ll6m3elO8A4bATX0RvUcx5KxkMHyj1fabsUG4+b0QSrn6thgM6quLK/kdHlM2BwNZbK9AA+CY2AWDENJjtWRaumzNqYi2qbVn6aKbjDPqyiH0FDz7+1sHn9dgyFl1xfp5GPSW5EHtudQ5DyOUVY7vDWpJbJoXZxCH/qoZH50b21x4wcTKa7vi6Y7NvNSIccGkSWLTUSRESjFWRA7mxB36RCML/Qcf49LfUtjWyuUy/VstNIdRnwAxcBJL81djBHTPN0HPYC5NAujtR85W70qGzPovriX+yWP7kYHvH4x3CJQ7NpvAbTJzb+QsZKLVy2p4CHEooTr7+UYG3FOp2mVPCeOfrWEH56YTDTRmQzZUxTOpalRS0OF7n5lhbgBbkzn6F0e6QKP5o7I+MC8CUMzmCuVLDQ== Sender: owner-linux-mm@kvack.org Precedence: bulk X-Loop: owner-majordomo@kvack.org List-ID: List-Subscribe: List-Unsubscribe: DMA allocations can be done through DMA pools, add an API that can be used to check if an allocation is done from a pool. This will be used in the later commit during preservation of DMA allocation. Signed-off-by: Samiullah Khawaja --- include/linux/dma-map-ops.h | 1 + kernel/dma/pool.c | 13 +++++++++++++ 2 files changed, 14 insertions(+) diff --git a/include/linux/dma-map-ops.h b/include/linux/dma-map-ops.h index 6a1832a73cad..9382785a2faa 100644 --- a/include/linux/dma-map-ops.h +++ b/include/linux/dma-map-ops.h @@ -216,6 +216,7 @@ struct page *dma_alloc_from_pool(struct device *dev, size_t size, bool (*phys_addr_ok)(struct device *, phys_addr_t, size_t)); bool dma_free_from_pool(struct device *dev, void *start, size_t size); +bool dma_is_from_pool(void *start, size_t size); int dma_direct_set_offset(struct device *dev, phys_addr_t cpu_start, dma_addr_t dma_start, u64 size); diff --git a/kernel/dma/pool.c b/kernel/dma/pool.c index 2b2fbb709242..d1a0bb03e478 100644 --- a/kernel/dma/pool.c +++ b/kernel/dma/pool.c @@ -307,3 +307,16 @@ bool dma_free_from_pool(struct device *dev, void *start, size_t size) return false; } + +bool dma_is_from_pool(void *start, size_t size) +{ + struct gen_pool *pool = NULL; + + while ((pool = dma_guess_pool(pool, 0))) { + if (!gen_pool_has_addr(pool, (unsigned long)start, size)) + continue; + return true; + } + + return false; +} -- 2.55.0.795.g602f6c329a-goog