From nobody Thu Jan 1 08:56:13 2026 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 41118C07545 for ; Tue, 24 Oct 2023 16:12:12 +0000 (UTC) Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S234950AbjJXQML (ORCPT ); Tue, 24 Oct 2023 12:12:11 -0400 Received: from lindbergh.monkeyblade.net ([23.128.96.19]:50444 "EHLO lindbergh.monkeyblade.net" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S230304AbjJXQMC (ORCPT ); Tue, 24 Oct 2023 12:12:02 -0400 Received: from mgamail.intel.com (mgamail.intel.com [134.134.136.31]) by lindbergh.monkeyblade.net (Postfix) with ESMTPS id B8F1010C3; Tue, 24 Oct 2023 09:12:00 -0700 (PDT) DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/simple; d=intel.com; i=@intel.com; q=dns/txt; s=Intel; t=1698163920; x=1729699920; h=from:to:cc:subject:date:message-id:in-reply-to: references:mime-version:content-transfer-encoding; bh=grMzeSHRyi5Hbnx2+6Q3kkMweOiaep23+j//w7Ao1+s=; b=g6zBbTMiaV27U4S6kWIC5HC+6VIreX6P4E/OM3KE9RSJ6wbGa3BnqzgJ 2VA4X+QvTlHTzkMvx7f8SUi7pBR7SZKGXxLYu0TzC3cXGMb4m0s90cR1Q oEoCvlffOFReQFQyvr/I5CF4QrpJzQVFFyD431O0SS3c7l2LvVhnHzBkc eBMbosRJ37IWq8ufAFJmVDT8AllXIYDuG8LQtaP53HNcxetvPacOtoX6J hgx+SBxF0uxKBby5Dbufl4qgkVQWACnC9FpPMK7FULXmxyMbaeNHGYFdk JseAICbvw2kQj63CFAj3FdUjXkTQ6Se7/vaCny1wgYK4nZdrpFgHMzWwM g==; X-IronPort-AV: E=McAfee;i="6600,9927,10873"; a="451328134" X-IronPort-AV: E=Sophos;i="6.03,248,1694761200"; d="scan'208";a="451328134" 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 09:07:47 -0700 X-ExtLoop1: 1 X-IronPort-AV: E=McAfee;i="6600,9927,10873"; a="902237205" X-IronPort-AV: E=Sophos;i="6.03,248,1694761200"; d="scan'208";a="902237205" 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 09:05:23 -0700 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 3/8] drm/cgroup: Add ability to query drm cgroup GPU time Date: Tue, 24 Oct 2023 17:07:22 +0100 Message-Id: <20231024160727.282960-4-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 Content-Transfer-Encoding: quoted-printable Precedence: bulk List-ID: X-Mailing-List: linux-kernel@vger.kernel.org Content-Type: text/plain; charset="utf-8" From: Tvrtko Ursulin Add a driver callback and core helper which allow querying the time spent on GPUs for processes belonging to a group. Signed-off-by: Tvrtko Ursulin --- include/drm/drm_drv.h | 28 ++++++++++++++++++++++++++++ kernel/cgroup/drm.c | 20 ++++++++++++++++++++ 2 files changed, 48 insertions(+) diff --git a/include/drm/drm_drv.h b/include/drm/drm_drv.h index e2640dc64e08..d1cee5899cde 100644 --- a/include/drm/drm_drv.h +++ b/include/drm/drm_drv.h @@ -157,6 +157,24 @@ enum drm_driver_feature { DRIVER_HAVE_IRQ =3D BIT(30), }; =20 +/** + * struct drm_cgroup_ops + * + * This structure contains a number of callbacks that drivers can provide = if + * they are able to support one or more of the functionalities implemented= by + * the DRM cgroup controller. + */ +struct drm_cgroup_ops { + /** + * @active_time_us: + * + * Optional callback for reporting the GPU time consumed by this client. + * + * Used by the DRM core when queried by the DRM cgroup controller. + */ + u64 (*active_time_us) (struct drm_file *); +}; + /** * struct drm_driver - DRM driver structure * @@ -434,6 +452,16 @@ struct drm_driver { */ const struct file_operations *fops; =20 +#ifdef CONFIG_CGROUP_DRM + /** + * @cg_ops: + * + * Optional pointer to driver callbacks facilitating integration with + * the DRM cgroup controller. + */ + const struct drm_cgroup_ops *cg_ops; +#endif + #ifdef CONFIG_DRM_LEGACY /* Everything below here is for legacy driver, never use! */ /* private: */ diff --git a/kernel/cgroup/drm.c b/kernel/cgroup/drm.c index d702be1b441f..acdb76635b60 100644 --- a/kernel/cgroup/drm.c +++ b/kernel/cgroup/drm.c @@ -9,6 +9,8 @@ #include #include =20 +#include + struct drm_cgroup_state { struct cgroup_subsys_state css; =20 @@ -31,6 +33,24 @@ css_to_drmcs(struct cgroup_subsys_state *css) return container_of(css, struct drm_cgroup_state, css); } =20 +static u64 drmcs_get_active_time_us(struct drm_cgroup_state *drmcs) +{ + struct drm_file *fpriv; + u64 total =3D 0; + + lockdep_assert_held(&drmcg_mutex); + + list_for_each_entry(fpriv, &drmcs->clients, clink) { + const struct drm_cgroup_ops *cg_ops =3D + fpriv->minor->dev->driver->cg_ops; + + if (cg_ops && cg_ops->active_time_us) + total +=3D cg_ops->active_time_us(fpriv); + } + + return total; +} + static void drmcs_free(struct cgroup_subsys_state *css) { struct drm_cgroup_state *drmcs =3D css_to_drmcs(css); --=20 2.39.2