From patchwork Fri Aug 25 12:43:49 2017 Content-Type: text/plain; charset="utf-8" MIME-Version: 1.0 Content-Transfer-Encoding: 7bit X-Patchwork-Submitter: Adrian Hunter X-Patchwork-Id: 9921945 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 9DB5E60349 for ; Fri, 25 Aug 2017 12:50:58 +0000 (UTC) Received: from mail.wl.linuxfoundation.org (localhost [127.0.0.1]) by mail.wl.linuxfoundation.org (Postfix) with ESMTP id 9162128138 for ; Fri, 25 Aug 2017 12:50:58 +0000 (UTC) Received: by mail.wl.linuxfoundation.org (Postfix, from userid 486) id 860992818A; Fri, 25 Aug 2017 12:50:58 +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=-6.9 required=2.0 tests=BAYES_00,RCVD_IN_DNSWL_HI autolearn=ham version=3.3.1 Received: from vger.kernel.org (vger.kernel.org [209.132.180.67]) by mail.wl.linuxfoundation.org (Postfix) with ESMTP id 5A12628138 for ; Fri, 25 Aug 2017 12:50:57 +0000 (UTC) Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S1755212AbdHYMu4 (ORCPT ); Fri, 25 Aug 2017 08:50:56 -0400 Received: from mga03.intel.com ([134.134.136.65]:58129 "EHLO mga03.intel.com" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S1755018AbdHYMu4 (ORCPT ); Fri, 25 Aug 2017 08:50:56 -0400 Received: from fmsmga002.fm.intel.com ([10.253.24.26]) by orsmga103.jf.intel.com with ESMTP/TLS/DHE-RSA-AES256-GCM-SHA384; 25 Aug 2017 05:50:55 -0700 X-ExtLoop1: 1 X-IronPort-AV: E=Sophos;i="5.41,425,1498546800"; d="scan'208";a="1210376979" Received: from ahunter-desktop.fi.intel.com ([10.237.72.168]) by fmsmga002.fm.intel.com with ESMTP; 25 Aug 2017 05:50:51 -0700 From: Adrian Hunter To: Ulf Hansson Cc: linux-mmc , linux-block , Bough Chen , Alex Lemberg , Mateusz Nowak , Yuliy Izrailov , Jaehoon Chung , Dong Aisheng , Das Asutosh , Zhangfei Gao , Sahitya Tummala , Harjani Ritesh , Venu Byravarasu , Linus Walleij , Shawn Lin Subject: [PATCH V6 06/12] mmc: mmc: Enable Command Queuing Date: Fri, 25 Aug 2017 15:43:49 +0300 Message-Id: <1503665035-16231-7-git-send-email-adrian.hunter@intel.com> X-Mailer: git-send-email 1.9.1 In-Reply-To: <1503665035-16231-1-git-send-email-adrian.hunter@intel.com> References: <1503665035-16231-1-git-send-email-adrian.hunter@intel.com> Organization: Intel Finland Oy, Registered Address: PL 281, 00181 Helsinki, Business Identity Code: 0357606 - 4, Domiciled in Helsinki Sender: linux-block-owner@vger.kernel.org Precedence: bulk List-ID: X-Mailing-List: linux-block@vger.kernel.org X-Virus-Scanned: ClamAV using ClamSMTP Enable the Command Queue if the host controller supports a command queue engine. It is not compatible with Packed Commands, so make a note of that in the comment. Signed-off-by: Adrian Hunter --- drivers/mmc/core/mmc.c | 17 +++++++++++++++++ 1 file changed, 17 insertions(+) diff --git a/drivers/mmc/core/mmc.c b/drivers/mmc/core/mmc.c index a7eb623f8daa..194cf2082e73 100644 --- a/drivers/mmc/core/mmc.c +++ b/drivers/mmc/core/mmc.c @@ -1784,6 +1784,23 @@ static int mmc_init_card(struct mmc_host *host, u32 ocr, } /* + * Enable Command Queue if supported. Note that Packed Commands cannot + * be used with Command Queue. + */ + card->ext_csd.cmdq_en = false; + if (card->ext_csd.cmdq_support && host->caps2 & MMC_CAP2_CQE) { + err = mmc_cmdq_enable(card); + if (err && err != -EBADMSG) + goto free_card; + if (err) { + pr_warn("%s: Enabling CMDQ failed\n", + mmc_hostname(card->host)); + card->ext_csd.cmdq_support = false; + card->ext_csd.cmdq_depth = 0; + err = 0; + } + } + /* * In some cases (e.g. RPMB or mmc_test), the Command Queue must be * disabled for a time, so a flag is needed to indicate to re-enable the * Command Queue.