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[2620:137:e000::1:20]) by mx.google.com with ESMTP id h3-20020a63e143000000b0049a8afc9b21si14201583pgk.730.2023.01.10.21.04.15; Tue, 10 Jan 2023 21:04:31 -0800 (PST) Received-SPF: pass (google.com: domain of linux-kernel-owner@vger.kernel.org designates 2620:137:e000::1:20 as permitted sender) client-ip=2620:137:e000::1:20; Authentication-Results: mx.google.com; dkim=pass header.i=@marcan.st header.s=default header.b=gtOdbdn7; spf=pass (google.com: domain of linux-kernel-owner@vger.kernel.org designates 2620:137:e000::1:20 as permitted sender) smtp.mailfrom=linux-kernel-owner@vger.kernel.org; dmarc=pass (p=QUARANTINE sp=QUARANTINE dis=NONE) header.from=marcan.st Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S231681AbjAKEjD (ORCPT + 99 others); Tue, 10 Jan 2023 23:39:03 -0500 Received: from lindbergh.monkeyblade.net ([23.128.96.19]:39946 "EHLO lindbergh.monkeyblade.net" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S231579AbjAKEie (ORCPT ); Tue, 10 Jan 2023 23:38:34 -0500 Received: from mail.marcansoft.com (marcansoft.com [212.63.210.85]) by lindbergh.monkeyblade.net (Postfix) with ESMTPS id 93C807640 for ; Tue, 10 Jan 2023 20:38:32 -0800 (PST) Received: from [127.0.0.1] (localhost [127.0.0.1]) (using TLSv1.3 with cipher TLS_AES_256_GCM_SHA384 (256/256 bits) key-exchange X25519 server-signature RSA-PSS (4096 bits) server-digest SHA256) (No client certificate requested) (Authenticated sender: sendonly@marcansoft.com) by mail.marcansoft.com (Postfix) with ESMTPSA id 9EA3E4245E; Wed, 11 Jan 2023 04:38:27 +0000 (UTC) DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/simple; d=marcan.st; s=default; t=1673411911; bh=3mwbRHlRhjEn6d7ialc4jgg5I5MLJj7InHbf8EL6vA0=; h=From:To:Cc:Subject:Date:In-Reply-To:References; b=gtOdbdn7hRKNeJrKJRvmsoB4h2WV3TdpgzrVGVcpQ+O/RUW4pAwhiS3d5c65/H4lv pJhXSXKrNTs7s8odh9yDMffyHuPvieDbG3RC7gWLalFhXhltp/ytsHX1dcIN74JUES tPz+pwugBCo+WOiapqL9nubi4zzwg1YjNgeqC0Uy7U4oVr9O0cH9ApVemrOaEE+SCW +UjamWWPMvp/gXVXdzpdunJkBp7+G2p/42WU82fSJUFtZej9YELwvVRIXWvMx8JlS/ 2YzLZGzn2w7Py8Wv3Bsjf4QEBty+FrMl0s1LX8po9TVKPCwyiAPUG2eAjpeeXyJnrB 1e+lPNgb1sjBA== From: Hector Martin To: Keith Busch , Jens Axboe , Christoph Hellwig , Sagi Grimberg Cc: Eric Curtin , Janne Grunau , Sven Peter , Alyssa Rosenzweig , asahi@lists.linux.dev, linux-arm-kernel@lists.infradead.org, linux-nvme@lists.infradead.org, linux-kernel@vger.kernel.org, Hector Martin Subject: [PATCH 2/2] nvme: Handle shut down controllers during initialization Date: Wed, 11 Jan 2023 13:36:14 +0900 Message-Id: <20230111043614.27087-3-marcan@marcan.st> X-Mailer: git-send-email 2.35.1 In-Reply-To: <20230111043614.27087-1-marcan@marcan.st> References: <20230111043614.27087-1-marcan@marcan.st> MIME-Version: 1.0 X-Spam-Status: No, score=-2.1 required=5.0 tests=BAYES_00,DKIM_SIGNED, DKIM_VALID,DKIM_VALID_AU,DKIM_VALID_EF,SPF_HELO_NONE,SPF_PASS autolearn=ham autolearn_force=no version=3.4.6 X-Spam-Checker-Version: SpamAssassin 3.4.6 (2021-04-09) on lindbergh.monkeyblade.net Precedence: bulk List-ID: X-Mailing-List: linux-kernel@vger.kernel.org X-getmail-retrieved-from-mailbox: =?utf-8?q?INBOX?= X-GMAIL-THRID: =?utf-8?q?1754701203504262991?= X-GMAIL-MSGID: =?utf-8?q?1754701203504262991?= According to the spec, controllers need an explicit reset to become active again after a controller shutdown. Check for this state in nvme_enable_ctrl and issue an explicit disable if required, which will trigger the required reset. Fixes: c76b8308e4c9 ("nvme-apple: fix controller shutdown in apple_nvme_disable") Signed-off-by: Hector Martin --- drivers/nvme/host/core.c | 13 +++++++++++++ 1 file changed, 13 insertions(+) diff --git a/drivers/nvme/host/core.c b/drivers/nvme/host/core.c index 7be562a4e1aa..84e5db192ff9 100644 --- a/drivers/nvme/host/core.c +++ b/drivers/nvme/host/core.c @@ -2410,6 +2410,19 @@ int nvme_enable_ctrl(struct nvme_ctrl *ctrl) if (ret) return ret; + /* + * If the controller is enabled but shut down, we need to disable it to + * reset it and have it come up. If the controller has completed a + * shutdown and is disabled, then we need to clear the shutdown request + * and enable it in the same write to CC. + * See NVMe Base Spec 2.0c Figure 47. + */ + if (ctrl->ctrl_config & NVME_CC_SHN_MASK && ctrl->ctrl_config & NVME_CC_ENABLE) { + ret = nvme_disable_ctrl(ctrl, false); + if (ret) + return ret; + } + ctrl->ctrl_config &= ~NVME_CC_SHN_MASK; ctrl->ctrl_config |= NVME_CC_ENABLE; ret = ctrl->ops->reg_write32(ctrl, NVME_REG_CC, ctrl->ctrl_config); if (ret)