From patchwork Fri Sep 27 20:05:29 2019 Content-Type: text/plain; charset="utf-8" MIME-Version: 1.0 Content-Transfer-Encoding: 7bit X-Patchwork-Submitter: Pierre-Louis Bossart X-Patchwork-Id: 11165119 Return-Path: Received: from mail.kernel.org (pdx-korg-mail-1.web.codeaurora.org [172.30.200.123]) by pdx-korg-patchwork-2.web.codeaurora.org (Postfix) with ESMTP id 994AF76 for ; Fri, 27 Sep 2019 20:10:28 +0000 (UTC) Received: from alsa0.perex.cz (alsa0.perex.cz [77.48.224.243]) (using TLSv1.2 with cipher ECDHE-RSA-AES256-GCM-SHA384 (256/256 bits)) (No client certificate requested) by mail.kernel.org (Postfix) with ESMTPS id 2935E217D9 for ; Fri, 27 Sep 2019 20:10:28 +0000 (UTC) Authentication-Results: mail.kernel.org; dkim=pass (1024-bit key) header.d=alsa-project.org header.i=@alsa-project.org header.b="DF+M9Lg6" DMARC-Filter: OpenDMARC Filter v1.3.2 mail.kernel.org 2935E217D9 Authentication-Results: mail.kernel.org; dmarc=fail (p=none dis=none) header.from=linux.intel.com Authentication-Results: mail.kernel.org; spf=pass smtp.mailfrom=alsa-devel-bounces@alsa-project.org Received: from alsa1.perex.cz (alsa1.perex.cz [207.180.221.201]) (using TLSv1.2 with cipher AECDH-AES256-SHA (256/256 bits)) (No client certificate requested) by alsa0.perex.cz (Postfix) with ESMTPS id 543DB1668; Fri, 27 Sep 2019 22:09:36 +0200 (CEST) DKIM-Filter: OpenDKIM Filter v2.11.0 alsa0.perex.cz 543DB1668 DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/simple; d=alsa-project.org; s=default; t=1569615026; bh=e+xHwBesdKFU+8Knud/oGUEu0w3WufbTrI64CJENvEo=; h=From:To:Date:In-Reply-To:References:Cc:Subject:List-Id: List-Unsubscribe:List-Archive:List-Post:List-Help:List-Subscribe: From; b=DF+M9Lg6AjcLeWPwOMnR2aRjlWgdbUtuZTZplNvv06IKPpiyfUESZefYqT4CWvfj4 rcJImRtSKERP5ipM2U3+y95KuvIYs+qncG0//Imz2yuM3plYhpGo6y1X6lyU/AwTND lkBXJRWtw0byxH35iDLTR8/+B+W8J7oF7HeXWjOs= Received: from alsa1.perex.cz (localhost.localdomain [127.0.0.1]) by alsa1.perex.cz (Postfix) with ESMTP id CA398F80633; Fri, 27 Sep 2019 22:06:16 +0200 (CEST) X-Original-To: alsa-devel@alsa-project.org Delivered-To: alsa-devel@alsa-project.org Received: by alsa1.perex.cz (Postfix, from userid 50401) id 6B7B4F8060E; Fri, 27 Sep 2019 22:06:09 +0200 (CEST) X-Spam-Checker-Version: SpamAssassin 3.4.0 (2014-02-07) on alsa1.perex.cz X-Spam-Level: X-Spam-Status: No, score=0.0 required=5.0 tests=SPF_HELO_PASS,SPF_NONE, URIBL_BLOCKED autolearn=disabled version=3.4.0 Received: from mga12.intel.com (mga12.intel.com [192.55.52.136]) (using TLSv1.2 with cipher ECDHE-RSA-AES256-GCM-SHA384 (256/256 bits)) (No client certificate requested) by alsa1.perex.cz (Postfix) with ESMTPS id 89FE6F800B3 for ; Fri, 27 Sep 2019 22:06:02 +0200 (CEST) DKIM-Filter: OpenDKIM Filter v2.11.0 alsa1.perex.cz 89FE6F800B3 X-Amp-Result: SKIPPED(no attachment in message) X-Amp-File-Uploaded: False Received: from fmsmga007.fm.intel.com ([10.253.24.52]) by fmsmga106.fm.intel.com with ESMTP/TLS/DHE-RSA-AES256-GCM-SHA384; 27 Sep 2019 13:05:46 -0700 X-ExtLoop1: 1 X-IronPort-AV: E=Sophos;i="5.64,556,1559545200"; d="scan'208";a="190444255" Received: from wcui-mobl1.amr.corp.intel.com (HELO pbossart-mobl3.intel.com) ([10.251.146.136]) by fmsmga007.fm.intel.com with ESMTP; 27 Sep 2019 13:05:46 -0700 From: Pierre-Louis Bossart To: alsa-devel@alsa-project.org Date: Fri, 27 Sep 2019 15:05:29 -0500 Message-Id: <20190927200538.660-5-pierre-louis.bossart@linux.intel.com> X-Mailer: git-send-email 2.20.1 In-Reply-To: <20190927200538.660-1-pierre-louis.bossart@linux.intel.com> References: <20190927200538.660-1-pierre-louis.bossart@linux.intel.com> MIME-Version: 1.0 Cc: tiwai@suse.de, Liam Girdwood , broonie@kernel.org, Pierre-Louis Bossart Subject: [alsa-devel] [PATCH 04/13] ASoC: SOF: ipc: retain DSP context after FW exception. X-BeenThere: alsa-devel@alsa-project.org X-Mailman-Version: 2.1.15 Precedence: list List-Id: "Alsa-devel mailing list for ALSA developers - http://www.alsa-project.org" List-Unsubscribe: , List-Archive: List-Post: List-Help: List-Subscribe: , Errors-To: alsa-devel-bounces@alsa-project.org Sender: "Alsa-devel" From: Liam Girdwood Add config option to prevent DSP entering D3 after any FW exception. This can then be used to dump FW context for debug. Signed-off-by: Liam Girdwood Signed-off-by: Pierre-Louis Bossart --- sound/soc/sof/Kconfig | 8 ++++++++ sound/soc/sof/debug.c | 16 ++++++++++++++++ sound/soc/sof/ipc.c | 4 +--- sound/soc/sof/sof-priv.h | 2 ++ 4 files changed, 27 insertions(+), 3 deletions(-) diff --git a/sound/soc/sof/Kconfig b/sound/soc/sof/Kconfig index cc592bcadae7..56a3ab66b46b 100644 --- a/sound/soc/sof/Kconfig +++ b/sound/soc/sof/Kconfig @@ -158,6 +158,14 @@ config SND_SOC_SOF_DEBUG_IPC_FLOOD_TEST Say Y if you want to enable IPC flood test. If unsure, select "N". +config SND_SOC_SOF_DEBUG_RETAIN_DSP_CONTEXT + bool "SOF retain DSP context on any FW exceptions" + help + This option keeps the DSP in D0 state so that firmware debug + information can be retained and dumped to userspace. + Say Y if you want to retain DSP context for FW exceptions. + If unsure, select "N". + endif ## SND_SOC_SOF_DEBUG endif ## SND_SOC_SOF_OPTIONS diff --git a/sound/soc/sof/debug.c b/sound/soc/sof/debug.c index 54cd431faab7..b8a4e899154c 100644 --- a/sound/soc/sof/debug.c +++ b/sound/soc/sof/debug.c @@ -461,3 +461,19 @@ void snd_sof_free_debug(struct snd_sof_dev *sdev) debugfs_remove_recursive(sdev->debugfs_root); } EXPORT_SYMBOL_GPL(snd_sof_free_debug); + +void snd_sof_handle_fw_exception(struct snd_sof_dev *sdev) +{ + if (IS_ENABLED(CONFIG_SND_SOC_SOF_DEBUG_RETAIN_DSP_CONTEXT) || + (sof_core_debug & SOF_DBG_RETAIN_CTX)) { + /* should we prevent DSP entering D3 ? */ + dev_info(sdev->dev, "info: preventing DSP entering D3 state to preserve context\n"); + pm_runtime_get_noresume(sdev->dev); + } + + /* dump vital information to the logs */ + snd_sof_dsp_dbg_dump(sdev, SOF_DBG_REGS | SOF_DBG_MBOX); + snd_sof_ipc_dump(sdev); + snd_sof_trace_notify_for_error(sdev); +} +EXPORT_SYMBOL(snd_sof_handle_fw_exception); diff --git a/sound/soc/sof/ipc.c b/sound/soc/sof/ipc.c index b2f359d2f7e5..b946c81197a1 100644 --- a/sound/soc/sof/ipc.c +++ b/sound/soc/sof/ipc.c @@ -210,9 +210,7 @@ static int tx_wait_done(struct snd_sof_ipc *ipc, struct snd_sof_ipc_msg *msg, if (ret == 0) { dev_err(sdev->dev, "error: ipc timed out for 0x%x size %d\n", hdr->cmd, hdr->size); - snd_sof_dsp_dbg_dump(ipc->sdev, SOF_DBG_REGS | SOF_DBG_MBOX); - snd_sof_ipc_dump(ipc->sdev); - snd_sof_trace_notify_for_error(ipc->sdev); + snd_sof_handle_fw_exception(ipc->sdev); ret = -ETIMEDOUT; } else { /* copy the data returned from DSP */ diff --git a/sound/soc/sof/sof-priv.h b/sound/soc/sof/sof-priv.h index d5b1a4f895da..348759035dd0 100644 --- a/sound/soc/sof/sof-priv.h +++ b/sound/soc/sof/sof-priv.h @@ -33,6 +33,7 @@ #define SOF_DBG_MBOX BIT(2) #define SOF_DBG_TEXT BIT(3) #define SOF_DBG_PCI BIT(4) +#define SOF_DBG_RETAIN_CTX BIT(5) /* prevent DSP D3 on FW exception */ /* global debug state set by SOF_DBG_ flags */ extern int sof_core_debug; @@ -580,6 +581,7 @@ void snd_sof_get_status(struct snd_sof_dev *sdev, u32 panic_code, struct sof_ipc_panic_info *panic_info, void *stack, size_t stack_words); int snd_sof_init_trace_ipc(struct snd_sof_dev *sdev); +void snd_sof_handle_fw_exception(struct snd_sof_dev *sdev); /* * Platform specific ops.