From patchwork Tue Nov 20 18:58:10 2018 Content-Type: text/plain; charset="utf-8" MIME-Version: 1.0 Content-Transfer-Encoding: 7bit X-Patchwork-Submitter: "Ho, Kenny" X-Patchwork-Id: 10691497 Return-Path: Received: from mail.wl.linuxfoundation.org (pdx-wl-mail.web.codeaurora.org [172.30.200.125]) by pdx-korg-patchwork-2.web.codeaurora.org (Postfix) with ESMTP id B285514BD for ; Wed, 21 Nov 2018 01:09:35 +0000 (UTC) Received: from mail.wl.linuxfoundation.org (localhost [127.0.0.1]) by mail.wl.linuxfoundation.org (Postfix) with ESMTP id 9C8772AF74 for ; Wed, 21 Nov 2018 01:09:35 +0000 (UTC) Received: by mail.wl.linuxfoundation.org (Postfix, from userid 486) id 8D21E2AFB6; Wed, 21 Nov 2018 01:09:35 +0000 (UTC) X-Spam-Checker-Version: SpamAssassin 3.3.1 (2010-03-16) on pdx-wl-mail.web.codeaurora.org X-Spam-Level: X-Spam-Status: No, score=-5.2 required=2.0 tests=BAD_ENC_HEADER,BAYES_00, MAILING_LIST_MULTI,RCVD_IN_DNSWL_MED autolearn=unavailable version=3.3.1 Received: from gabe.freedesktop.org (gabe.freedesktop.org [131.252.210.177]) (using TLSv1.2 with cipher DHE-RSA-AES256-GCM-SHA384 (256/256 bits)) (No client certificate requested) by mail.wl.linuxfoundation.org (Postfix) with ESMTPS id D227B2AF74 for ; 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Ip=[165.204.84.17]; Helo=[SATLEXCHOV02.amd.com] X-MS-Exchange-CrossTenant-FromEntityHeader: HybridOnPrem X-MS-Exchange-Transport-CrossTenantHeadersStamped: SN1PR12MB0752 X-Mailman-Approved-At: Wed, 21 Nov 2018 01:09:32 +0000 Subject: [Intel-gfx] [PATCH RFC 1/5] cgroup: Introduce cgroup for drm subsystem X-BeenThere: intel-gfx@lists.freedesktop.org X-Mailman-Version: 2.1.23 Precedence: list List-Id: Intel graphics driver community testing & development List-Unsubscribe: , List-Archive: List-Post: List-Help: List-Subscribe: , Errors-To: intel-gfx-bounces@lists.freedesktop.org Sender: "Intel-gfx" X-Virus-Scanned: ClamAV using ClamSMTP Change-Id: I6830d3990f63f0c13abeba29b1d330cf28882831 Signed-off-by: Kenny Ho --- include/linux/cgroup_drm.h | 32 ++++++++++++++++++++++++ include/linux/cgroup_subsys.h | 4 +++ init/Kconfig | 5 ++++ kernel/cgroup/Makefile | 1 + kernel/cgroup/drm.c | 46 +++++++++++++++++++++++++++++++++++ 5 files changed, 88 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..79ab38b0f46d --- /dev/null +++ b/include/linux/cgroup_drm.h @@ -0,0 +1,32 @@ +/* SPDX-License-Identifier: MIT + * Copyright 2018 Advanced Micro Devices, Inc. + */ +#ifndef _CGROUP_DRM_H +#define _CGROUP_DRM_H + +#ifdef CONFIG_CGROUP_DRM + +#include + +struct drmcgrp { + struct cgroup_subsys_state css; +}; + +static inline struct drmcgrp *css_drmcgrp(struct cgroup_subsys_state *css) +{ + return css ? container_of(css, struct drmcgrp, css) : NULL; +} + +static inline struct drmcgrp *get_drmcgrp(struct task_struct *task) +{ + return css_drmcgrp(task_get_css(task, drm_cgrp_id)); +} + + +static inline struct drmcgrp *parent_drmcgrp(struct drmcgrp *cg) +{ + return css_drmcgrp(cg->css.parent); +} + +#endif /* CONFIG_CGROUP_DRM */ +#endif /* _CGROUP_DRM_H */ diff --git a/include/linux/cgroup_subsys.h b/include/linux/cgroup_subsys.h index acb77dcff3b4..ddedad809e8b 100644 --- a/include/linux/cgroup_subsys.h +++ b/include/linux/cgroup_subsys.h @@ -61,6 +61,10 @@ SUBSYS(pids) SUBSYS(rdma) #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 a4112e95724a..bee1e164443a 100644 --- a/init/Kconfig +++ b/init/Kconfig @@ -836,6 +836,11 @@ 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 (EXPERIMENTAL)" + help + Provides accounting and enforcement of resources in the DRM subsystem. + config CGROUP_FREEZER bool "Freezer controller" help diff --git a/kernel/cgroup/Makefile b/kernel/cgroup/Makefile index bfcdae896122..6af14bd93050 100644 --- a/kernel/cgroup/Makefile +++ b/kernel/cgroup/Makefile @@ -4,5 +4,6 @@ obj-y := cgroup.o rstat.o namespace.o cgroup-v1.o obj-$(CONFIG_CGROUP_FREEZER) += freezer.o obj-$(CONFIG_CGROUP_PIDS) += pids.o obj-$(CONFIG_CGROUP_RDMA) += rdma.o +obj-$(CONFIG_CGROUP_DRM) += drm.o obj-$(CONFIG_CPUSETS) += cpuset.o obj-$(CONFIG_CGROUP_DEBUG) += debug.o diff --git a/kernel/cgroup/drm.c b/kernel/cgroup/drm.c new file mode 100644 index 000000000000..d9e194b9aead --- /dev/null +++ b/kernel/cgroup/drm.c @@ -0,0 +1,46 @@ +// SPDX-License-Identifier: MIT +// Copyright 2018 Advanced Micro Devices, Inc. +#include +#include +#include + +static u64 drmcgrp_test_read(struct cgroup_subsys_state *css, + struct cftype *cft) +{ + return 88; +} + +static void drmcgrp_css_free(struct cgroup_subsys_state *css) +{ + struct drmcgrp *drmcgrp = css_drmcgrp(css); + + kfree(css_drmcgrp(css)); +} + +static struct cgroup_subsys_state * +drmcgrp_css_alloc(struct cgroup_subsys_state *parent_css) +{ + struct drmcgrp *drmcgrp; + + drmcgrp = kzalloc(sizeof(struct drmcgrp), GFP_KERNEL); + if (!drmcgrp) + return ERR_PTR(-ENOMEM); + + return &drmcgrp->css; +} + +struct cftype files[] = { + { + .name = "drm_test", + .read_u64 = drmcgrp_test_read, + }, + { } /* terminate */ +}; + +struct cgroup_subsys drm_cgrp_subsys = { + .css_alloc = drmcgrp_css_alloc, + .css_free = drmcgrp_css_free, + .early_init = false, + .legacy_cftypes = files, + .dfl_cftypes = files, +};