From patchwork Mon Aug 15 14:49:50 2016 Content-Type: text/plain; charset="utf-8" MIME-Version: 1.0 Content-Transfer-Encoding: 7bit X-Patchwork-Submitter: akash.goel@intel.com X-Patchwork-Id: 9281113 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 A5AFA607FD for ; Mon, 15 Aug 2016 14:36:44 +0000 (UTC) Received: from mail.wl.linuxfoundation.org (localhost [127.0.0.1]) by mail.wl.linuxfoundation.org (Postfix) with ESMTP id 978702840F for ; Mon, 15 Aug 2016 14:36:44 +0000 (UTC) Received: by mail.wl.linuxfoundation.org (Postfix, from userid 486) id 8C4AF28D00; Mon, 15 Aug 2016 14:36:44 +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 4F1022840F for ; Mon, 15 Aug 2016 14:36:44 +0000 (UTC) Received: from gabe.freedesktop.org (localhost [127.0.0.1]) by gabe.freedesktop.org (Postfix) with ESMTP id 821D86E541; Mon, 15 Aug 2016 14:36:43 +0000 (UTC) X-Original-To: intel-gfx@lists.freedesktop.org Delivered-To: intel-gfx@lists.freedesktop.org Received: from mga01.intel.com (mga01.intel.com [192.55.52.88]) by gabe.freedesktop.org (Postfix) with ESMTP id 320726E532 for ; Mon, 15 Aug 2016 14:36:35 +0000 (UTC) Received: from orsmga003.jf.intel.com ([10.7.209.27]) by fmsmga101.fm.intel.com with ESMTP; 15 Aug 2016 07:36:35 -0700 X-ExtLoop1: 1 X-IronPort-AV: E=Sophos;i="5.28,525,1464678000"; d="scan'208";a="865682539" Received: from akashgoe-desktop.iind.intel.com ([10.223.82.36]) by orsmga003.jf.intel.com with ESMTP; 15 Aug 2016 07:36:34 -0700 From: akash.goel@intel.com To: intel-gfx@lists.freedesktop.org Date: Mon, 15 Aug 2016 20:19:50 +0530 Message-Id: <1471272599-14586-10-git-send-email-akash.goel@intel.com> X-Mailer: git-send-email 1.9.2 In-Reply-To: <1471272599-14586-1-git-send-email-akash.goel@intel.com> References: <1471272599-14586-1-git-send-email-akash.goel@intel.com> Cc: Akash Goel Subject: [Intel-gfx] [PATCH 09/18] drm/i915: New lock to serialize the Host2GuC actions 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: , MIME-Version: 1.0 Errors-To: intel-gfx-bounces@lists.freedesktop.org Sender: "Intel-gfx" X-Virus-Scanned: ClamAV using ClamSMTP From: Akash Goel With the addition of new Host2GuC actions related to GuC logging, there is a need of a lock to serialize them, as they can execute concurrently with each other and also with other existing actions. v2: Use mutex in place of spinlock to serialize, as sleep can happen while waiting for the action's response from GuC. (Tvrtko) v3: To conform to the general rules, acquire mutex before taking the forcewake. (Tvrtko) Signed-off-by: Akash Goel Reviewed-by: Tvrtko Ursulin --- drivers/gpu/drm/i915/i915_guc_submission.c | 3 +++ drivers/gpu/drm/i915/intel_guc.h | 3 +++ 2 files changed, 6 insertions(+) diff --git a/drivers/gpu/drm/i915/i915_guc_submission.c b/drivers/gpu/drm/i915/i915_guc_submission.c index 9b1054c..f4c5846 100644 --- a/drivers/gpu/drm/i915/i915_guc_submission.c +++ b/drivers/gpu/drm/i915/i915_guc_submission.c @@ -87,6 +87,7 @@ static int host2guc_action(struct intel_guc *guc, u32 *data, u32 len) if (WARN_ON(len < 1 || len > 15)) return -EINVAL; + mutex_lock(&guc->action_lock); intel_uncore_forcewake_get(dev_priv, FORCEWAKE_ALL); dev_priv->guc.action_count += 1; @@ -127,6 +128,7 @@ static int host2guc_action(struct intel_guc *guc, u32 *data, u32 len) dev_priv->guc.action_status = status; intel_uncore_forcewake_put(dev_priv, FORCEWAKE_ALL); + mutex_unlock(&guc->action_lock); return ret; } @@ -1359,6 +1361,7 @@ int i915_guc_submission_init(struct drm_i915_private *dev_priv) guc->ctx_pool_vma = vma; ida_init(&guc->ctx_ids); + mutex_init(&guc->action_lock); guc_create_log(guc); guc_create_ads(guc); diff --git a/drivers/gpu/drm/i915/intel_guc.h b/drivers/gpu/drm/i915/intel_guc.h index 3299cce..1704495 100644 --- a/drivers/gpu/drm/i915/intel_guc.h +++ b/drivers/gpu/drm/i915/intel_guc.h @@ -155,6 +155,9 @@ struct intel_guc { uint64_t submissions[I915_NUM_ENGINES]; uint32_t last_seqno[I915_NUM_ENGINES]; + + /* To serialize the Host2GuC actions */ + struct mutex action_lock; }; /* intel_guc_loader.c */