From patchwork Wed May 3 08:34:57 2023 Content-Type: text/plain; charset="utf-8" MIME-Version: 1.0 Content-Transfer-Encoding: 8bit X-Patchwork-Submitter: Maarten Lankhorst X-Patchwork-Id: 13229859 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 gabe.freedesktop.org (gabe.freedesktop.org [131.252.210.177]) (using TLSv1.2 with cipher ECDHE-RSA-AES256-GCM-SHA384 (256/256 bits)) (No client certificate requested) by smtp.lore.kernel.org (Postfix) with ESMTPS id 464E5C7EE2C for ; Wed, 3 May 2023 08:36:10 +0000 (UTC) Received: from gabe.freedesktop.org (localhost [127.0.0.1]) by gabe.freedesktop.org (Postfix) with ESMTP id 20A9A10E20A; Wed, 3 May 2023 08:36:08 +0000 (UTC) Received: from mblankhorst.nl (lankhorst.se [IPv6:2a02:2308:0:7ec:e79c:4e97:b6c4:f0ae]) by gabe.freedesktop.org (Postfix) with ESMTPS id 5E53B10E20A; Wed, 3 May 2023 08:36:06 +0000 (UTC) From: Maarten Lankhorst To: dri-devel@lists.freedesktop.org, cgroups@vger.kernel.org, intel-xe@lists.freedesktop.org Date: Wed, 3 May 2023 10:34:57 +0200 Message-Id: <20230503083500.645848-2-maarten.lankhorst@linux.intel.com> X-Mailer: git-send-email 2.34.1 In-Reply-To: <20230503083500.645848-1-maarten.lankhorst@linux.intel.com> References: <20230503083500.645848-1-maarten.lankhorst@linux.intel.com> MIME-Version: 1.0 Subject: [Intel-gfx] [RFC PATCH 1/4] cgroup: Add the DRM cgroup controller X-BeenThere: intel-gfx@lists.freedesktop.org X-Mailman-Version: 2.1.29 Precedence: list List-Id: Intel graphics driver community testing & development List-Unsubscribe: , List-Archive: List-Post: List-Help: List-Subscribe: , Cc: Daniel Vetter , Thomas Zimmermann , intel-gfx@lists.freedesktop.org, linux-kernel@vger.kernel.org, amd-gfx@lists.freedesktop.org, Maxime Ripard , Zefan Li , Johannes Weiner , Tejun Heo , David Airlie Errors-To: intel-gfx-bounces@lists.freedesktop.org Sender: "Intel-gfx" From: Tvrtko Ursulin Skeleton controller without any functionality. Signed-off-by: Tvrtko Ursulin Signed-off-by: Maarten Lankhorst --- include/linux/cgroup_drm.h | 9 ++++++ include/linux/cgroup_subsys.h | 4 +++ init/Kconfig | 7 ++++ kernel/cgroup/Makefile | 1 + kernel/cgroup/drm.c | 60 +++++++++++++++++++++++++++++++++++ 5 files changed, 81 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..8ef66a47619f --- /dev/null +++ b/include/linux/cgroup_drm.h @@ -0,0 +1,9 @@ +/* SPDX-License-Identifier: MIT */ +/* + * Copyright © 2023 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 +#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 1fb5f313d18f..1679229143c0 100644 --- a/init/Kconfig +++ b/init/Kconfig @@ -1093,6 +1093,13 @@ config CGROUP_RDMA Attaching processes with active RDMA resources to the cgroup hierarchy is allowed even if can cross the hierarchy's limit. +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-$(CONFIG_CGROUP_PIDS) += pids.o obj-$(CONFIG_CGROUP_RDMA) += rdma.o obj-$(CONFIG_CPUSETS) += cpuset.o obj-$(CONFIG_CGROUP_MISC) += misc.o +obj-$(CONFIG_CGROUP_DRM) += drm.o obj-$(CONFIG_CGROUP_DEBUG) += debug.o diff --git a/kernel/cgroup/drm.c b/kernel/cgroup/drm.c new file mode 100644 index 000000000000..02c8eaa633d3 --- /dev/null +++ b/kernel/cgroup/drm.c @@ -0,0 +1,60 @@ +/* SPDX-License-Identifier: MIT */ +/* + * Copyright © 2023 Intel Corporation + */ + +#include +#include +#include + +struct drm_cgroup_state { + struct cgroup_subsys_state css; +}; + +struct drm_root_cgroup_state { + struct drm_cgroup_state drmcs; +}; + +static struct drm_root_cgroup_state root_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 void drmcs_free(struct cgroup_subsys_state *css) +{ + struct drm_cgroup_state *drmcs = css_to_drmcs(css); + + if (drmcs != &root_drmcs.drmcs) + kfree(drmcs); +} + +static struct cgroup_subsys_state * +drmcs_alloc(struct cgroup_subsys_state *parent_css) +{ + struct drm_cgroup_state *drmcs; + + if (!parent_css) { + drmcs = &root_drmcs.drmcs; + } else { + drmcs = kzalloc(sizeof(*drmcs), GFP_KERNEL); + if (!drmcs) + return ERR_PTR(-ENOMEM); + } + + return &drmcs->css; +} + +struct cftype files[] = { + { } /* Zero entry terminates. */ +}; + +struct cgroup_subsys drm_cgrp_subsys = { + .css_alloc = drmcs_alloc, + .css_free = drmcs_free, + .early_init = false, + .legacy_cftypes = files, + .dfl_cftypes = files, +};