From nobody Mon Sep 15 11:44:14 2025 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 vger.kernel.org (vger.kernel.org [23.128.96.18]) by smtp.lore.kernel.org (Postfix) with ESMTP id 8A53AC61DB3 for ; Thu, 12 Jan 2023 17:37:02 +0000 (UTC) Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S230041AbjALRg7 (ORCPT ); Thu, 12 Jan 2023 12:36:59 -0500 Received: from lindbergh.monkeyblade.net ([23.128.96.19]:53976 "EHLO lindbergh.monkeyblade.net" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S229680AbjALRgN (ORCPT ); Thu, 12 Jan 2023 12:36:13 -0500 Received: from mga09.intel.com (mga09.intel.com [134.134.136.24]) by lindbergh.monkeyblade.net (Postfix) with ESMTPS id C5E466B58B; Thu, 12 Jan 2023 08:57:52 -0800 (PST) DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/simple; d=intel.com; i=@intel.com; q=dns/txt; s=Intel; t=1673542675; x=1705078675; h=from:to:cc:subject:date:message-id:in-reply-to: references:mime-version:content-transfer-encoding; bh=5tUTxI03m+NTLtcglmz0tTkp8uvuUcMX2wFEFmhnCZQ=; b=gr5YodDuerwBQpE/UJU3gArgEwRoR95cUhGIrKTfPRJSbXAZ9VyJhKLK YSsxEtfU2ghk+8vtG/4Ix0bppiM0Qn0HpbnkUG2xF2DY3+1Q7XaAfp9tZ T5uMKPiKacYagxDw5C+ZtW4LcBYOViaHbAfQTSMJCS21tOhJnwo2NAmpN Ua9mvST6mLSveY9ZCjbLAv/IKrMMEXO6+7BlXGdNUP5FlorYsAPUhnTnC mC5rUS0OPDKa+++egBp9syE3IIWygKDNYBqrewZrrq+c1y5qcctMaxuge ZedOwQ2PhCjZ7s2bcTmjjNPOqj52XBvOagFo3A6W37vMyoXR+zvL196pg w==; X-IronPort-AV: E=McAfee;i="6500,9779,10588"; a="325016371" X-IronPort-AV: E=Sophos;i="5.97,211,1669104000"; d="scan'208";a="325016371" Received: from orsmga007.jf.intel.com ([10.7.209.58]) by orsmga102.jf.intel.com with ESMTP/TLS/ECDHE-RSA-AES256-GCM-SHA384; 12 Jan 2023 08:56:38 -0800 X-IronPort-AV: E=McAfee;i="6500,9779,10588"; a="651232620" X-IronPort-AV: E=Sophos;i="5.97,211,1669104000"; d="scan'208";a="651232620" Received: from jacton-mobl.ger.corp.intel.com (HELO localhost.localdomain) ([10.213.195.171]) by orsmga007-auth.jf.intel.com with ESMTP/TLS/ECDHE-RSA-AES256-GCM-SHA384; 12 Jan 2023 08:56:34 -0800 From: Tvrtko Ursulin To: Intel-gfx@lists.freedesktop.org, dri-devel@lists.freedesktop.org Cc: cgroups@vger.kernel.org, linux-kernel@vger.kernel.org, Tejun Heo , Johannes Weiner , Zefan Li , Dave Airlie , Daniel Vetter , Rob Clark , =?UTF-8?q?St=C3=A9phane=20Marchesin?= , "T . J . Mercier" , Kenny.Ho@amd.com, =?UTF-8?q?Christian=20K=C3=B6nig?= , Brian Welty , Tvrtko Ursulin Subject: [RFC 03/12] cgroup: Add the DRM cgroup controller Date: Thu, 12 Jan 2023 16:56:00 +0000 Message-Id: <20230112165609.1083270-4-tvrtko.ursulin@linux.intel.com> X-Mailer: git-send-email 2.34.1 In-Reply-To: <20230112165609.1083270-1-tvrtko.ursulin@linux.intel.com> References: <20230112165609.1083270-1-tvrtko.ursulin@linux.intel.com> MIME-Version: 1.0 Content-Type: text/plain; charset="utf-8" Content-Transfer-Encoding: quoted-printable Precedence: bulk List-ID: X-Mailing-List: linux-kernel@vger.kernel.org From: Tvrtko Ursulin Skeleton controller without any functionality. Signed-off-by: Tvrtko Ursulin --- include/linux/cgroup_drm.h | 9 ++++++ include/linux/cgroup_subsys.h | 4 +++ init/Kconfig | 7 +++++ kernel/cgroup/Makefile | 1 + kernel/cgroup/drm.c | 59 +++++++++++++++++++++++++++++++++++ 5 files changed, 80 insertions(+) create mode 100644 include/linux/cgroup_drm.h create mode 100644 kernel/cgroup/drm.c diff --git a/include/linux/cgroup_drm.h b/include/linux/cgroup_drm.h new file mode 100644 index 000000000000..bf8abc6b8ebf --- /dev/null +++ b/include/linux/cgroup_drm.h @@ -0,0 +1,9 @@ +/* SPDX-License-Identifier: MIT */ +/* + * Copyright =C2=A9 2022 Intel Corporation + */ + +#ifndef _CGROUP_DRM_H +#define _CGROUP_DRM_H + +#endif /* _CGROUP_DRM_H */ diff --git a/include/linux/cgroup_subsys.h b/include/linux/cgroup_subsys.h index 445235487230..49460494a010 100644 --- a/include/linux/cgroup_subsys.h +++ b/include/linux/cgroup_subsys.h @@ -65,6 +65,10 @@ SUBSYS(rdma) SUBSYS(misc) #endif =20 +#if IS_ENABLED(CONFIG_CGROUP_DRM) +SUBSYS(drm) +#endif + /* * The following subsystems are not supported on the default hierarchy. */ diff --git a/init/Kconfig b/init/Kconfig index 7e5c3ddc341d..c5ace0d57007 100644 --- a/init/Kconfig +++ b/init/Kconfig @@ -1089,6 +1089,13 @@ config CGROUP_RDMA Attaching processes with active RDMA resources to the cgroup hierarchy is allowed even if can cross the hierarchy's limit. =20 +config CGROUP_DRM + bool "DRM controller" + help + Provides the DRM subsystem controller. + + ... + config CGROUP_FREEZER bool "Freezer controller" help diff --git a/kernel/cgroup/Makefile b/kernel/cgroup/Makefile index 12f8457ad1f9..849bd2917477 100644 --- a/kernel/cgroup/Makefile +++ b/kernel/cgroup/Makefile @@ -6,4 +6,5 @@ obj-$(CONFIG_CGROUP_PIDS) +=3D pids.o obj-$(CONFIG_CGROUP_RDMA) +=3D rdma.o obj-$(CONFIG_CPUSETS) +=3D cpuset.o obj-$(CONFIG_CGROUP_MISC) +=3D misc.o +obj-$(CONFIG_CGROUP_DRM) +=3D drm.o obj-$(CONFIG_CGROUP_DEBUG) +=3D debug.o diff --git a/kernel/cgroup/drm.c b/kernel/cgroup/drm.c new file mode 100644 index 000000000000..48a8d646a094 --- /dev/null +++ b/kernel/cgroup/drm.c @@ -0,0 +1,59 @@ +/* SPDX-License-Identifier: MIT */ +/* + * Copyright =C2=A9 2022 Intel Corporation + */ + +#include +#include +#include +#include + +struct drm_cgroup_state { + struct cgroup_subsys_state css; +}; + +struct drm_root_cgroup_state { + struct drm_cgroup_state drmcs; +}; + +static inline struct drm_cgroup_state * +css_to_drmcs(struct cgroup_subsys_state *css) +{ + return container_of(css, struct drm_cgroup_state, css); +} + +static struct drm_root_cgroup_state root_drmcs; + +static void drmcs_free(struct cgroup_subsys_state *css) +{ + if (css !=3D &root_drmcs.drmcs.css) + kfree(css_to_drmcs(css)); +} + +static struct cgroup_subsys_state * +drmcs_alloc(struct cgroup_subsys_state *parent_css) +{ + struct drm_cgroup_state *drmcs; + + if (!parent_css) { + drmcs =3D &root_drmcs.drmcs; + } else { + drmcs =3D kzalloc(sizeof(*drmcs), GFP_KERNEL); + if (!drmcs) + return ERR_PTR(-ENOMEM); + } + + return &drmcs->css; +} + +struct cftype files[] =3D { + { } /* Zero entry terminates. */ +}; + +struct cgroup_subsys drm_cgrp_subsys =3D { + .css_alloc =3D drmcs_alloc, + .css_free =3D drmcs_free, + .early_init =3D false, + .legacy_cftypes =3D files, + .dfl_cftypes =3D files, +}; --=20 2.34.1