From patchwork Tue Dec 19 05:26:57 2017 Content-Type: text/plain; charset="utf-8" MIME-Version: 1.0 Content-Transfer-Encoding: 8bit X-Patchwork-Submitter: Dhinakaran Pandiyan X-Patchwork-Id: 10122265 Return-Path: Received: from mail.wl.linuxfoundation.org (pdx-wl-mail.web.codeaurora.org [172.30.200.125]) by pdx-korg-patchwork.web.codeaurora.org (Postfix) with ESMTP id 060F56019C for ; Tue, 19 Dec 2017 05:27:47 +0000 (UTC) Received: from mail.wl.linuxfoundation.org (localhost [127.0.0.1]) by mail.wl.linuxfoundation.org (Postfix) with ESMTP id EBACB28C09 for ; Tue, 19 Dec 2017 05:27:46 +0000 (UTC) Received: by mail.wl.linuxfoundation.org (Postfix, from userid 486) id E010D28C18; Tue, 19 Dec 2017 05:27:46 +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=-4.2 required=2.0 tests=BAYES_00, RCVD_IN_DNSWL_MED autolearn=ham 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 90E1028C09 for ; Tue, 19 Dec 2017 05:27:46 +0000 (UTC) Received: from gabe.freedesktop.org (localhost [127.0.0.1]) by gabe.freedesktop.org (Postfix) with ESMTP id A649789B46; Tue, 19 Dec 2017 05:27:45 +0000 (UTC) X-Original-To: intel-gfx@lists.freedesktop.org Delivered-To: intel-gfx@lists.freedesktop.org Received: from mga03.intel.com (mga03.intel.com [134.134.136.65]) by gabe.freedesktop.org (Postfix) with ESMTPS id 7E16489A88; Tue, 19 Dec 2017 05:27:44 +0000 (UTC) X-Amp-Result: SKIPPED(no attachment in message) X-Amp-File-Uploaded: False Received: from fmsmga007.fm.intel.com ([10.253.24.52]) by orsmga103.jf.intel.com with ESMTP/TLS/DHE-RSA-AES256-GCM-SHA384; 18 Dec 2017 21:27:42 -0800 X-ExtLoop1: 1 X-IronPort-AV: E=Sophos;i="5.45,425,1508828400"; d="scan'208";a="3514468" Received: from dk-thinkpad-x260.jf.intel.com (HELO localhost.localdomain) ([10.54.75.18]) by fmsmga007.fm.intel.com with ESMTP; 18 Dec 2017 21:27:25 -0800 From: Dhinakaran Pandiyan To: intel-gfx@lists.freedesktop.org Date: Mon, 18 Dec 2017 21:26:57 -0800 Message-Id: <20171219052659.2355-7-dhinakaran.pandiyan@intel.com> X-Mailer: git-send-email 2.11.0 In-Reply-To: <20171219052659.2355-1-dhinakaran.pandiyan@intel.com> References: <20171219052659.2355-1-dhinakaran.pandiyan@intel.com> MIME-Version: 1.0 Cc: Daniel Vetter , Dhinakaran Pandiyan , dri-devel@lists.freedesktop.org, Rodrigo Vivi Subject: [Intel-gfx] [PATCH v2 6/8] drm/i915: Use an atomic_t array to track power domain use count. X-BeenThere: intel-gfx@lists.freedesktop.org X-Mailman-Version: 2.1.18 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 Convert the power_domains->domain_use_count array that tracks per-domain use count to atomic_t type. This is needed to be able to read/write the use counts outside of the power domain mutex. Cc: Daniel Vetter Cc: Ville Syrjälä Cc: Rodrigo Vivi Signed-off-by: Dhinakaran Pandiyan --- drivers/gpu/drm/i915/i915_debugfs.c | 2 +- drivers/gpu/drm/i915/i915_drv.h | 2 +- drivers/gpu/drm/i915/intel_runtime_pm.c | 11 +++++------ 3 files changed, 7 insertions(+), 8 deletions(-) diff --git a/drivers/gpu/drm/i915/i915_debugfs.c b/drivers/gpu/drm/i915/i915_debugfs.c index 1a7b28f62570..1f1d9162f2c2 100644 --- a/drivers/gpu/drm/i915/i915_debugfs.c +++ b/drivers/gpu/drm/i915/i915_debugfs.c @@ -2764,7 +2764,7 @@ static int i915_power_domain_info(struct seq_file *m, void *unused) for_each_power_domain(power_domain, power_well->domains) seq_printf(m, " %-23s %d\n", intel_display_power_domain_str(power_domain), - power_domains->domain_use_count[power_domain]); + atomic_read(&power_domains->domain_use_count[power_domain])); } mutex_unlock(&power_domains->lock); diff --git a/drivers/gpu/drm/i915/i915_drv.h b/drivers/gpu/drm/i915/i915_drv.h index 1e4e613e7b41..ddadeb9eaf49 100644 --- a/drivers/gpu/drm/i915/i915_drv.h +++ b/drivers/gpu/drm/i915/i915_drv.h @@ -1489,7 +1489,7 @@ struct i915_power_domains { int power_well_count; struct mutex lock; - int domain_use_count[POWER_DOMAIN_NUM]; + atomic_t domain_use_count[POWER_DOMAIN_NUM]; struct i915_power_well *power_wells; }; diff --git a/drivers/gpu/drm/i915/intel_runtime_pm.c b/drivers/gpu/drm/i915/intel_runtime_pm.c index 96ab74f3d101..992caec1fbc4 100644 --- a/drivers/gpu/drm/i915/intel_runtime_pm.c +++ b/drivers/gpu/drm/i915/intel_runtime_pm.c @@ -1453,7 +1453,7 @@ __intel_display_power_get_domain(struct drm_i915_private *dev_priv, for_each_power_domain_well(dev_priv, power_well, BIT_ULL(domain)) intel_power_well_get(dev_priv, power_well); - power_domains->domain_use_count[domain]++; + atomic_inc(&power_domains->domain_use_count[domain]); } /** @@ -1539,10 +1539,9 @@ void intel_display_power_put(struct drm_i915_private *dev_priv, mutex_lock(&power_domains->lock); - WARN(!power_domains->domain_use_count[domain], - "Use count on domain %s is already zero\n", + WARN(atomic_dec_return(&power_domains->domain_use_count[domain]) < 0, + "Use count on domain %s was already zero\n", intel_display_power_domain_str(domain)); - power_domains->domain_use_count[domain]--; for_each_power_domain_well_rev(dev_priv, power_well, BIT_ULL(domain)) intel_power_well_put(dev_priv, power_well); @@ -3049,7 +3048,7 @@ static void intel_power_domains_dump_info(struct drm_i915_private *dev_priv) for_each_power_domain(domain, power_well->domains) DRM_DEBUG_DRIVER(" %-23s %d\n", intel_display_power_domain_str(domain), - power_domains->domain_use_count[domain]); + atomic_read(&power_domains->domain_use_count[domain])); } } @@ -3092,7 +3091,7 @@ void intel_power_domains_verify_state(struct drm_i915_private *dev_priv) domains_count = 0; for_each_power_domain(domain, power_well->domains) - domains_count += power_domains->domain_use_count[domain]; + domains_count += atomic_read(&power_domains->domain_use_count[domain]); if (power_well->count != domains_count) { DRM_ERROR("power well %s refcount/domain refcount mismatch "