From patchwork Tue Oct 24 16:07:20 2023 Content-Type: text/plain; charset="utf-8" MIME-Version: 1.0 Content-Transfer-Encoding: 8bit X-Patchwork-Submitter: Tvrtko Ursulin X-Patchwork-Id: 13435050 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 AD3D6C25B48 for ; Tue, 24 Oct 2023 16:12:00 +0000 (UTC) Received: from gabe.freedesktop.org (localhost [127.0.0.1]) by gabe.freedesktop.org (Postfix) with ESMTP id A292B10E40B; Tue, 24 Oct 2023 16:11:59 +0000 (UTC) Received: from mgamail.intel.com (mgamail.intel.com [134.134.136.31]) by gabe.freedesktop.org (Postfix) with ESMTPS id F2CCC10E40B; Tue, 24 Oct 2023 16:11:57 +0000 (UTC) DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/simple; d=intel.com; i=@intel.com; q=dns/txt; s=Intel; t=1698163918; x=1729699918; h=from:to:cc:subject:date:message-id:in-reply-to: references:mime-version:content-transfer-encoding; bh=DDR9QYygtf/mqSlMDbJLfsleqL3tuJUQWKqqud2aweU=; b=ikGSY1/UIYDrJeJRyGtnjKeMoLlsPUGaOLTSSRbwptSfcF2d48FpjrP8 Awo26qkKwfPtVkmgGqlcSdrmYzAf+1kFyv6PCPulL8xQ4wXElquBNi3eC LQUzpdjiNoWm/AOISiLaAQ1w2yk6m1j3qLOofmsFcI5lWExU2FqQnanI5 /PdYDqxYmp9E0QPzmm/U/t3ynE8manAG3R5cQNMctrIxVlmpPXFctT/MP eBraDhYs+ZxqKeV3MOZsUtkUHes3uhLXTyAU3lnh02PTiUKUAKY21JXdd YYI4fWNeH7HOYZ7e/QY4voAEjRKyDFxHL3ghnZH/1ROIRAKyRhFsn5s97 g==; X-IronPort-AV: E=McAfee;i="6600,9927,10873"; a="451328094" X-IronPort-AV: E=Sophos;i="6.03,248,1694761200"; d="scan'208";a="451328094" Received: from fmsmga001.fm.intel.com ([10.253.24.23]) by orsmga104.jf.intel.com with ESMTP/TLS/ECDHE-RSA-AES256-GCM-SHA384; 24 Oct 2023 09:07:41 -0700 X-ExtLoop1: 1 X-IronPort-AV: E=McAfee;i="6600,9927,10873"; a="902237142" X-IronPort-AV: E=Sophos;i="6.03,248,1694761200"; d="scan'208";a="902237142" Received: from aidenbar-mobl.ger.corp.intel.com (HELO localhost.localdomain) ([10.213.219.125]) by fmsmga001-auth.fm.intel.com with ESMTP/TLS/ECDHE-RSA-AES256-GCM-SHA384; 24 Oct 2023 09:05:16 -0700 From: Tvrtko Ursulin To: Intel-gfx@lists.freedesktop.org, dri-devel@lists.freedesktop.org Subject: [RFC 1/8] cgroup: Add the DRM cgroup controller Date: Tue, 24 Oct 2023 17:07:20 +0100 Message-Id: <20231024160727.282960-2-tvrtko.ursulin@linux.intel.com> X-Mailer: git-send-email 2.39.2 In-Reply-To: <20231024160727.282960-1-tvrtko.ursulin@linux.intel.com> References: <20231024160727.282960-1-tvrtko.ursulin@linux.intel.com> MIME-Version: 1.0 X-BeenThere: dri-devel@lists.freedesktop.org X-Mailman-Version: 2.1.29 Precedence: list List-Id: Direct Rendering Infrastructure - Development List-Unsubscribe: , List-Archive: List-Post: List-Help: List-Subscribe: , Cc: Rob Clark , Brian Welty , Kenny.Ho@amd.com, Tvrtko Ursulin , Daniel Vetter , Johannes Weiner , linux-kernel@vger.kernel.org, =?utf-8?q?St=C3=A9phane_Marchesin?= , =?utf-8?q?Chris?= =?utf-8?q?tian_K=C3=B6nig?= , Zefan Li , Dave Airlie , Tejun Heo , cgroups@vger.kernel.org, "T . J . Mercier" Errors-To: dri-devel-bounces@lists.freedesktop.org Sender: "dri-devel" 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 | 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 6d35728b94b2..ed8ffa444e37 100644 --- a/init/Kconfig +++ b/init/Kconfig @@ -1066,6 +1066,13 @@ 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, +};