From patchwork Thu Mar 12 14:44:20 2020 Content-Type: text/plain; charset="utf-8" MIME-Version: 1.0 Content-Transfer-Encoding: 7bit X-Patchwork-Submitter: Guennadi Liakhovetski X-Patchwork-Id: 11434469 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 AA25A6CA for ; Thu, 12 Mar 2020 14:49:02 +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 4155B20724 for ; Thu, 12 Mar 2020 14:49:02 +0000 (UTC) Authentication-Results: mail.kernel.org; dkim=pass (1024-bit key) header.d=alsa-project.org header.i=@alsa-project.org header.b="SlN4+kyz" DMARC-Filter: OpenDMARC Filter v1.3.2 mail.kernel.org 4155B20724 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 8FFD01701; Thu, 12 Mar 2020 15:48:16 +0100 (CET) DKIM-Filter: OpenDKIM Filter v2.11.0 alsa0.perex.cz 8FFD01701 DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/simple; d=alsa-project.org; s=default; t=1584024540; bh=c7SIsHAAXjU1YLHnq0zVFulXi1hfunmviwHY2Bjo2p0=; h=From:To:Subject:Date:In-Reply-To:References:Cc:List-Id: List-Unsubscribe:List-Archive:List-Post:List-Help:List-Subscribe: From; b=SlN4+kyzSc7eNG/vmOga4+VFvIDSP7Z/Dj0g5yfzP5f6zlOzR6H0rnLAV0+aUa5Cf txxtWji247a1e/gfdvNiiHbbvO/BVZFjMs1zYM9Cv0o7ffB63vd1Kbe522Q5LVYxn6 r+gKqSaMRZlnTdV3mMVuH+gd6rdfSf6jCWVeGxm0= Received: from alsa1.perex.cz (localhost.localdomain [127.0.0.1]) by alsa1.perex.cz (Postfix) with ESMTP id 68849F802EC; Thu, 12 Mar 2020 15:45:12 +0100 (CET) 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 6E25BF802A2; Thu, 12 Mar 2020 15:44:57 +0100 (CET) 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_NONE,SPF_NONE, SURBL_BLOCKED,URIBL_BLOCKED autolearn=disabled version=3.4.0 Received: from mga06.intel.com (mga06.intel.com [134.134.136.31]) (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 04CF1F80291; Thu, 12 Mar 2020 15:44:51 +0100 (CET) DKIM-Filter: OpenDKIM Filter v2.11.0 alsa1.perex.cz 04CF1F80291 X-Amp-Result: SKIPPED(no attachment in message) X-Amp-File-Uploaded: False Received: from fmsmga006.fm.intel.com ([10.253.24.20]) by orsmga104.jf.intel.com with ESMTP/TLS/DHE-RSA-AES256-GCM-SHA384; 12 Mar 2020 07:44:40 -0700 X-ExtLoop1: 1 X-IronPort-AV: E=Sophos;i="5.70,545,1574150400"; d="scan'208";a="443957529" Received: from gliakhov-mobl2.ger.corp.intel.com (HELO ubuntu.ger.corp.intel.com) ([10.249.40.3]) by fmsmga006.fm.intel.com with ESMTP; 12 Mar 2020 07:44:39 -0700 From: Guennadi Liakhovetski To: alsa-devel@alsa-project.org Subject: [PATCH 05/14] ASoC: SOF: support IPC with immediate response Date: Thu, 12 Mar 2020 15:44:20 +0100 Message-Id: <20200312144429.17959-6-guennadi.liakhovetski@linux.intel.com> X-Mailer: git-send-email 2.20.1 In-Reply-To: <20200312144429.17959-1-guennadi.liakhovetski@linux.intel.com> References: <20200312144429.17959-1-guennadi.liakhovetski@linux.intel.com> MIME-Version: 1.0 Cc: Liam Girdwood , Takashi Iwai , Mark Brown , sound-open-firmware@alsa-project.org 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" Usually when an IPC message is sent, we have to wait for a reply from the DSP or from the host in the VirtIO case. However, sometimes in the VirtIO case a response is available immediately. Skip sleeping in such cases. Signed-off-by: Guennadi Liakhovetski --- sound/soc/sof/ipc.c | 9 +++++---- sound/soc/sof/ops.h | 10 +++++++++- 2 files changed, 14 insertions(+), 5 deletions(-) diff --git a/sound/soc/sof/ipc.c b/sound/soc/sof/ipc.c index cf57085..6fa501c1 100644 --- a/sound/soc/sof/ipc.c +++ b/sound/soc/sof/ipc.c @@ -262,6 +262,10 @@ int sof_ipc_tx_message_unlocked(struct snd_sof_ipc *ipc, u32 header, sdev->msg = msg; + /* + * If snd_sof_dsp_send_msg() returns a positive number it means, that a + * response is already available, no need to sleep waiting for it + */ ret = snd_sof_dsp_send_msg(sdev, msg); /* Next reply that we receive will be related to this message */ if (!ret) @@ -279,10 +283,7 @@ int sof_ipc_tx_message_unlocked(struct snd_sof_ipc *ipc, u32 header, ipc_log_header(sdev->dev, "ipc tx", msg->header); /* now wait for completion */ - if (!ret) - ret = tx_wait_done(ipc, msg, reply_data); - - return ret; + return tx_wait_done(ipc, msg, reply_data); } EXPORT_SYMBOL(sof_ipc_tx_message_unlocked); diff --git a/sound/soc/sof/ops.h b/sound/soc/sof/ops.h index a771500..43bcfbf 100644 --- a/sound/soc/sof/ops.h +++ b/sound/soc/sof/ops.h @@ -274,7 +274,15 @@ static inline void snd_sof_dsp_block_write(struct snd_sof_dev *sdev, u32 bar, sof_ops(sdev)->block_write(sdev, bar, offset, src, bytes); } -/* ipc */ +/** + * snd_sof_dsp_send_msg - call sdev ops to send a message + * @sdev: sdev context + * @msg: message to send + * + * Returns < 0 - an error code + * 0 - the message has been sent, wait for a reply + * > 0 - the message has been sent, a reply is already available + */ static inline int snd_sof_dsp_send_msg(struct snd_sof_dev *sdev, struct snd_sof_ipc_msg *msg) {