From patchwork Mon Aug 15 14:49:55 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: 9281109 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 7F04D607FD for ; Mon, 15 Aug 2016 14:36:43 +0000 (UTC) Received: from mail.wl.linuxfoundation.org (localhost [127.0.0.1]) by mail.wl.linuxfoundation.org (Postfix) with ESMTP id 7106E28CF7 for ; Mon, 15 Aug 2016 14:36:43 +0000 (UTC) Received: by mail.wl.linuxfoundation.org (Postfix, from userid 486) id 65FC528D00; Mon, 15 Aug 2016 14:36:43 +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 14AB22840F for ; Mon, 15 Aug 2016 14:36:43 +0000 (UTC) Received: from gabe.freedesktop.org (localhost [127.0.0.1]) by gabe.freedesktop.org (Postfix) with ESMTP id 949996E536; Mon, 15 Aug 2016 14:36:42 +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 4B72E6E53C for ; Mon, 15 Aug 2016 14:36:42 +0000 (UTC) Received: from orsmga003.jf.intel.com ([10.7.209.27]) by fmsmga101.fm.intel.com with ESMTP; 15 Aug 2016 07:36:42 -0700 X-ExtLoop1: 1 X-IronPort-AV: E=Sophos;i="5.28,525,1464678000"; d="scan'208";a="865682622" Received: from akashgoe-desktop.iind.intel.com ([10.223.82.36]) by orsmga003.jf.intel.com with ESMTP; 15 Aug 2016 07:36:41 -0700 From: akash.goel@intel.com To: intel-gfx@lists.freedesktop.org Date: Mon, 15 Aug 2016 20:19:55 +0530 Message-Id: <1471272599-14586-15-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 14/18] drm/i915: Forcefully flush GuC log buffer on reset 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: Sagar Arun Kamble Before capturing the GuC logs as a part of error state, there should be a force log buffer flush action sent to GuC before proceeding with GPU reset and re-initializing GUC. There could be some data in the log buffer which is yet to be captured and those logs would be particularly useful to understand that why the GPU reset was initiated. v2: - Avoid the wait via flush_work, to serialize against an ongoing log buffer flush, from the error state capture path. (Chris) - Rebase. Signed-off-by: Sagar Arun Kamble Signed-off-by: Akash Goel --- drivers/gpu/drm/i915/i915_gpu_error.c | 2 ++ drivers/gpu/drm/i915/i915_guc_submission.c | 30 ++++++++++++++++++++++++++++++ drivers/gpu/drm/i915/intel_guc.h | 1 + 3 files changed, 33 insertions(+) diff --git a/drivers/gpu/drm/i915/i915_gpu_error.c b/drivers/gpu/drm/i915/i915_gpu_error.c index 94297aa..b73c671 100644 --- a/drivers/gpu/drm/i915/i915_gpu_error.c +++ b/drivers/gpu/drm/i915/i915_gpu_error.c @@ -1301,6 +1301,8 @@ static void i915_gem_capture_guc_log_buffer(struct drm_i915_private *dev_priv, if (!dev_priv->guc.log.vma || (i915.guc_log_level < 0)) return; + i915_guc_flush_logs(dev_priv, false); + error->guc_log = i915_error_object_create(dev_priv, dev_priv->guc.log.vma); } diff --git a/drivers/gpu/drm/i915/i915_guc_submission.c b/drivers/gpu/drm/i915/i915_guc_submission.c index b8d6313..85df2f3 100644 --- a/drivers/gpu/drm/i915/i915_guc_submission.c +++ b/drivers/gpu/drm/i915/i915_guc_submission.c @@ -185,6 +185,16 @@ static int host2guc_logbuffer_flush_complete(struct intel_guc *guc) return host2guc_action(guc, data, 1); } +static int host2guc_force_logbuffer_flush(struct intel_guc *guc) +{ + u32 data[2]; + + data[0] = HOST2GUC_ACTION_FORCE_LOG_BUFFER_FLUSH; + data[1] = 0; + + return host2guc_action(guc, data, 2); +} + /* * Initialise, update, or clear doorbell data shared with the GuC * @@ -1536,6 +1546,26 @@ void i915_guc_capture_logs(struct drm_i915_private *dev_priv) intel_runtime_pm_put(dev_priv); } +void i915_guc_flush_logs(struct drm_i915_private *dev_priv, bool can_wait) +{ + if (!i915.enable_guc_submission || (i915.guc_log_level < 0)) + return; + + /* First disable the interrupts, will be renabled afterwards */ + gen9_disable_guc_interrupts(dev_priv); + + /* Before initiating the forceful flush, wait for any pending/ongoing + * flush to complete otherwise forceful flush may not happen, but wait + * can't be done for some paths like error state capture in which case + * take a chance & directly attempt the forceful flush. + */ + if (can_wait) + flush_work(&dev_priv->guc.log.flush_work); + + /* Ask GuC to update the log buffer state */ + host2guc_force_logbuffer_flush(&dev_priv->guc); +} + void i915_guc_unregister(struct drm_i915_private *dev_priv) { if (!i915.enable_guc_submission) diff --git a/drivers/gpu/drm/i915/intel_guc.h b/drivers/gpu/drm/i915/intel_guc.h index 8598f38..d7eda42 100644 --- a/drivers/gpu/drm/i915/intel_guc.h +++ b/drivers/gpu/drm/i915/intel_guc.h @@ -182,6 +182,7 @@ int i915_guc_wq_check_space(struct drm_i915_gem_request *rq); void i915_guc_submission_disable(struct drm_i915_private *dev_priv); void i915_guc_submission_fini(struct drm_i915_private *dev_priv); void i915_guc_capture_logs(struct drm_i915_private *dev_priv); +void i915_guc_flush_logs(struct drm_i915_private *dev_priv, bool can_wait); void i915_guc_register(struct drm_i915_private *dev_priv); void i915_guc_unregister(struct drm_i915_private *dev_priv);