From patchwork Mon Mar 10 12:06:13 2025 Content-Type: text/plain; charset="utf-8" MIME-Version: 1.0 Content-Transfer-Encoding: 7bit X-Patchwork-Submitter: Maxime Ripard X-Patchwork-Id: 14009717 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 43BE7C282DE for ; Mon, 10 Mar 2025 12:06:42 +0000 (UTC) Received: by kanga.kvack.org (Postfix) id 9C18E280012; Mon, 10 Mar 2025 08:06:41 -0400 (EDT) Received: by kanga.kvack.org (Postfix, from userid 40) id 96E55280009; Mon, 10 Mar 2025 08:06:41 -0400 (EDT) X-Delivered-To: int-list-linux-mm@kvack.org Received: by kanga.kvack.org (Postfix, from userid 63042) id 8121A280012; Mon, 10 Mar 2025 08:06:41 -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 632E2280009 for ; Mon, 10 Mar 2025 08:06:41 -0400 (EDT) Received: from smtpin22.hostedemail.com (a10.router.float.18 [10.200.18.1]) by unirelay01.hostedemail.com (Postfix) with ESMTP id 56C7B1C9F05 for ; Mon, 10 Mar 2025 12:06:41 +0000 (UTC) X-FDA: 83205514602.22.BA78E4F Received: from nyc.source.kernel.org (nyc.source.kernel.org [147.75.193.91]) by imf14.hostedemail.com (Postfix) with ESMTP id 88DCE100015 for ; Mon, 10 Mar 2025 12:06:39 +0000 (UTC) Authentication-Results: imf14.hostedemail.com; dkim=pass header.d=kernel.org header.s=k20201202 header.b=mYulIu1z; dmarc=pass (policy=quarantine) header.from=kernel.org; spf=pass (imf14.hostedemail.com: domain of mripard@kernel.org designates 147.75.193.91 as permitted sender) smtp.mailfrom=mripard@kernel.org ARC-Message-Signature: i=1; a=rsa-sha256; c=relaxed/relaxed; d=hostedemail.com; s=arc-20220608; t=1741608399; 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:content-transfer-encoding: in-reply-to:in-reply-to:references:references:dkim-signature; bh=YqVPsPSG/iXm0nP9ReiLHN12qXZqbDDhug48IiUHH/M=; b=0euf1DhO0/s1PUQ4aV+KIfCJ80Mi3L3RDAdekE8rIBE+ugB9UI4KQPA/WACCCPdLreNIjc eAsPz4SARogJkZd0Y5YZjosH6aa3ztNPl7xWEiYmGIoIjEYbaM4ads1qyVro0jQLdcasjx P7iRiLfhfqDaj/NDQdfmrBWgsvk59co= ARC-Seal: i=1; s=arc-20220608; d=hostedemail.com; t=1741608399; a=rsa-sha256; cv=none; b=Zbr0ELXIuiahj153Tje7JAabiuiSk4FskVRDaC9R+VwqujYN6yN77nRLtHiaHQ8HNWbt3a 0Qrlg8MhbXJTf3DJ6tL5lSV60RuyukFqPdeAi+64G8ghHkw0bh7+GdX4XtmaZrkm4LNX9g Mmj2VlGmk+RNTjc5pfcpc0dBOsEeUmw= ARC-Authentication-Results: i=1; imf14.hostedemail.com; dkim=pass header.d=kernel.org header.s=k20201202 header.b=mYulIu1z; dmarc=pass (policy=quarantine) header.from=kernel.org; spf=pass (imf14.hostedemail.com: domain of mripard@kernel.org designates 147.75.193.91 as permitted sender) smtp.mailfrom=mripard@kernel.org Received: from smtp.kernel.org (transwarp.subspace.kernel.org [100.75.92.58]) by nyc.source.kernel.org (Postfix) with ESMTP id 81425A45AAF; Mon, 10 Mar 2025 12:01:08 +0000 (UTC) Received: by smtp.kernel.org (Postfix) with ESMTPSA id 97C23C4CEF0; Mon, 10 Mar 2025 12:06:37 +0000 (UTC) DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/simple; d=kernel.org; s=k20201202; t=1741608398; bh=WpLKbe0/o+ohbkFGUscUlJWaO731RUjLbL+Wu9pvI1U=; h=From:Date:Subject:References:In-Reply-To:To:Cc:From; b=mYulIu1z9ZEz5XkKZ5ATnLojzzD1yagpF3IUFzymoYKt1M64RhIURBCwQz6UGL9jx dk6SmnsmVNg7Ya2ZC8vhkX5HICDga1QdItNg2jKcZmRbM3Dvf6zEZ6FlXL88g4Pxhe 9hCpWzILTutINy+exPSa+BRv3t1IjGB1EMZy+SOiEXOEAm2vXSiaC0D7npv0EN+FS7 cyc49Rq6YCERbGqwe/I2kU3FX6yw62UbzY5H/PP2Smt77flePvWsu/3tOiRNiJzE+0 ASC5Nns3DUof7bktIcF4B6u3Z9uLN8X4wCyQfupoMhCvY37rSccXvJ5zGeZt/RfBI3 agHoPHP+GrWlA== From: Maxime Ripard Date: Mon, 10 Mar 2025 13:06:13 +0100 Subject: [PATCH RFC 07/12] dma: Create default dmem region for DMA allocations MIME-Version: 1.0 Message-Id: <20250310-dmem-cgroups-v1-7-2984c1bc9312@kernel.org> References: <20250310-dmem-cgroups-v1-0-2984c1bc9312@kernel.org> In-Reply-To: <20250310-dmem-cgroups-v1-0-2984c1bc9312@kernel.org> To: Andrew Morton , Marek Szyprowski , Robin Murphy , Sumit Semwal , =?utf-8?q?Christian_K=C3=B6nig?= , Benjamin Gaignard , Brian Starkey , John Stultz , "T.J. Mercier" , Maarten Lankhorst , Thomas Zimmermann , David Airlie , Simona Vetter , Tomasz Figa , Mauro Carvalho Chehab Cc: Hans Verkuil , Laurent Pinchart , linux-mm@kvack.org, linux-kernel@vger.kernel.org, iommu@lists.linux.dev, linux-media@vger.kernel.org, dri-devel@lists.freedesktop.org, linaro-mm-sig@lists.linaro.org, Maxime Ripard X-Mailer: b4 0.14.2 X-Developer-Signature: v=1; a=openpgp-sha256; l=2077; i=mripard@kernel.org; h=from:subject:message-id; bh=WpLKbe0/o+ohbkFGUscUlJWaO731RUjLbL+Wu9pvI1U=; b=owGbwMvMwCX2+D1vfrpE4FHG02pJDOnnrm6xM/5i39P7QfPABed6dt2fzyxeLHihdV/S9tw9B dnH5m/EOkpZGMS4GGTFFFlihM2XxJ2a9bqTjW8ezBxWJpAhDFycAjCRTeUM/73LJk6x+PrwzCb3 CAWZ6DNLu2dcEL352d8z2iVgslmKngEjwxudlx/MBE50LEqRPi0r8LcjVG/iNCV3ptV2gT4ydX2 m/AA= X-Developer-Key: i=mripard@kernel.org; a=openpgp; fpr=BE5675C37E818C8B5764241C254BCFC56BF6CE8D X-Rspam-User: X-Rspamd-Queue-Id: 88DCE100015 X-Rspamd-Server: rspam08 X-Stat-Signature: sqxn1tf1bn78xa7koyp4j8pnzcfrp8xf X-HE-Tag: 1741608399-746026 X-HE-Meta: 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 gDpJwpBc LGbevR2vj9FllbKPoeZsnz8BGnufUSrvJSY/1chx6mpHO1NT342qfJ4f3Z/XSE3EPAOaFPlw+p3zkOl+9gAkgUc+tiFPLsflXmyyat+8uXz09P8yUDzjBvgLnrTa3yVoSzGec/lVkLAdPp3XvDSTPQIQZ7dhswFq7c6FF29QyM6TGmNhdD+D2qHuT1u/TzdTG2SishcCliEwXAciEe/zPzGnZmfW8XFbZkdCEEINjOlJ8amA3GzbIFDbqeuAZr3t77awsxl3Io8cIRjzjHgMjmYw1q+gVxue2cQ+ln1cUKUb7GJiyswkKcYUQEaDDgNUEabm/cfeDE6ZWXWGrgW9KV7P+PX81aM97Q4QLD/htiJXClbE= 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: Some DMA allocations are not going to be performed through dedicated sub-allocators but using the default path. We need to create a default region to track those as well. Signed-off-by: Maxime Ripard --- kernel/dma/mapping.c | 23 +++++++++++++++++++++++ 1 file changed, 23 insertions(+) diff --git a/kernel/dma/mapping.c b/kernel/dma/mapping.c index cda127027e48a757f2d9fb04a49249d2b0238871..7bc3957512fd84e0bf3a89c210338be72457b5c9 100644 --- a/kernel/dma/mapping.c +++ b/kernel/dma/mapping.c @@ -5,10 +5,11 @@ * Copyright (c) 2006 SUSE Linux Products GmbH * Copyright (c) 2006 Tejun Heo */ #include /* for max_pfn */ #include +#include #include #include #include #include #include @@ -25,10 +26,14 @@ defined(CONFIG_ARCH_HAS_SYNC_DMA_FOR_CPU) || \ defined(CONFIG_ARCH_HAS_SYNC_DMA_FOR_CPU_ALL) bool dma_default_coherent = IS_ENABLED(CONFIG_ARCH_DMA_DEFAULT_COHERENT); #endif +#if IS_ENABLED(CONFIG_CGROUP_DMEM) +static struct dmem_cgroup_region *default_dmem_cgroup_region; +#endif + /* * Managed DMA API */ struct dma_devres { size_t size; @@ -587,10 +592,28 @@ u64 dma_get_required_mask(struct device *dev) */ return DMA_BIT_MASK(32); } EXPORT_SYMBOL_GPL(dma_get_required_mask); +#if IS_ENABLED(CONFIG_CGROUP_DMEM) +static int __init dma_init_dmem_cgroup(void) +{ + struct dmem_cgroup_region *region; + + if (default_dmem_cgroup_region) + return -EBUSY; + + region = dmem_cgroup_register_region(U64_MAX, "dma/global"); + if (IS_ERR(region)) + return PTR_ERR(region); + + default_dmem_cgroup_region = region; + return 0; +} +core_initcall(dma_init_dmem_cgroup); +#endif + void *dma_alloc_attrs(struct device *dev, size_t size, dma_addr_t *dma_handle, gfp_t flag, unsigned long attrs) { const struct dma_map_ops *ops = get_dma_ops(dev); void *cpu_addr;