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: 14009781 Received: from smtp.kernel.org (aws-us-west-2-korg-mail-1.web.codeaurora.org [10.30.226.201]) (using TLSv1.2 with cipher ECDHE-RSA-AES256-GCM-SHA384 (256/256 bits)) (No client certificate requested) by smtp.subspace.kernel.org (Postfix) with ESMTPS id 99D2822AE4E; Mon, 10 Mar 2025 12:06:38 +0000 (UTC) Authentication-Results: smtp.subspace.kernel.org; arc=none smtp.client-ip=10.30.226.201 ARC-Seal: i=1; a=rsa-sha256; d=subspace.kernel.org; s=arc-20240116; t=1741608398; cv=none; b=j+1s4SA7vMhwAtoOoHOUQr8DNZsAgRSe5GIS9fSWko/4Kc4UBag1LPbQCVJM3GYhoqxD5yFLy8Ozn5b0ZJf6AOvG3F8Iq7joyvItmX8QteaRtg/pFhrrjCQyl/MpzsgeygjeNtwGBE7BisoEO6A87UQxiV4EXDJymJU5ywZFicg= ARC-Message-Signature: i=1; a=rsa-sha256; d=subspace.kernel.org; s=arc-20240116; t=1741608398; c=relaxed/simple; bh=WpLKbe0/o+ohbkFGUscUlJWaO731RUjLbL+Wu9pvI1U=; h=From:Date:Subject:MIME-Version:Content-Type:Message-Id:References: In-Reply-To:To:Cc; b=OSvz9Xet15ten96DSxR9mqpqqtW0qfZ0s5USDjE3E3UrZJmQkMjyrnifbJ3PjBl+dEqEmPtfP46GAurukqJ35zgC1wdBJIo5yaCWz0mzObvfSbskqkcqq2CrNlj8+NGixR6ddX4MjC9c+2kOvU+TluHa78E7FWTm6WvM1RPtDfQ= ARC-Authentication-Results: i=1; smtp.subspace.kernel.org; dkim=pass (2048-bit key) header.d=kernel.org header.i=@kernel.org header.b=mYulIu1z; arc=none smtp.client-ip=10.30.226.201 Authentication-Results: smtp.subspace.kernel.org; dkim=pass (2048-bit key) header.d=kernel.org header.i=@kernel.org header.b="mYulIu1z" 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 Precedence: bulk X-Mailing-List: linux-media@vger.kernel.org List-Id: List-Subscribe: List-Unsubscribe: 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 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;