From patchwork Tue Nov 6 02:04:02 2018 Content-Type: text/plain; charset="utf-8" MIME-Version: 1.0 Content-Transfer-Encoding: 7bit X-Patchwork-Submitter: "Chia-Lin Kao (AceLan)" X-Patchwork-Id: 10669519 X-Patchwork-Delegate: bhelgaas@google.com Return-Path: Received: from mail.wl.linuxfoundation.org (pdx-wl-mail.web.codeaurora.org [172.30.200.125]) by pdx-korg-patchwork-2.web.codeaurora.org (Postfix) with ESMTP id 459901803 for ; Tue, 6 Nov 2018 02:04:23 +0000 (UTC) Received: from mail.wl.linuxfoundation.org (localhost [127.0.0.1]) by mail.wl.linuxfoundation.org (Postfix) with ESMTP id 376E02A127 for ; Tue, 6 Nov 2018 02:04:23 +0000 (UTC) Received: by mail.wl.linuxfoundation.org (Postfix, from userid 486) id 2BEFC2A12A; Tue, 6 Nov 2018 02:04:23 +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=-7.7 required=2.0 tests=BAYES_00,DKIM_INVALID, DKIM_SIGNED,MAILING_LIST_MULTI,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 BF42C2A127 for ; Tue, 6 Nov 2018 02:04:22 +0000 (UTC) Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S1729326AbeKFL0x (ORCPT ); Tue, 6 Nov 2018 06:26:53 -0500 Received: from mail-pf1-f196.google.com ([209.85.210.196]:35446 "EHLO mail-pf1-f196.google.com" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S1729309AbeKFL0x (ORCPT ); Tue, 6 Nov 2018 06:26:53 -0500 Received: by mail-pf1-f196.google.com with SMTP id v9-v6so3038448pff.2; Mon, 05 Nov 2018 18:04:09 -0800 (PST) DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=gmail.com; s=20161025; h=sender:from:to:subject:date:message-id:in-reply-to:references; bh=q1iCaObEwHgNndGc+IQ2osgW1NSsAor6JGa6GWHzAjI=; b=dZZb7Qv8iGNz116jBljeafsTgUke4MGb++eS36R2NpsyYZMX+dG8LtxyGs+/fU3ULT gDDfodxu7e229UDpblC6SmU3JRc9lL5kJKZsmfmqf7w8BVohxZ1r2f8IzFvJ1Uut3L5b lynYPz01FKEY8eaVI9WZKDQIV8frB+XNyI94GDr539SVvN3OopJcteugo2LNgXa46Q6L dXqhuzID3lGxzInLt0sxzDxZ72jr52roLRhndFKx+MUFGlexHTZIkMemAKNqt9wqqtxC vslyqGgWZFnY/evt7lUJZH96SVsV1BdBzsSbaQ84nyEPBvZfOXSHA3mtWpZ6c/YJ9w67 TTbg== X-Google-DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=1e100.net; s=20161025; h=x-gm-message-state:sender:from:to:subject:date:message-id :in-reply-to:references; bh=q1iCaObEwHgNndGc+IQ2osgW1NSsAor6JGa6GWHzAjI=; b=Ras3qwU7zrM7bT40rDDRG8jYWHuvjK5inFLd6wE9C/nnNQK4UhlEn5FEtuVwyF1Bcm 1Sb3jrDn/Q6FM4WYu5nM6Gmv7AUatHCkJkLxZLUARWUhN/8RIlV8Yw1KddAkxUPkfYpn JqCvBbV75XV2x6U/KmG2H1roAlgEzeXimUqdsSIfdB4wNs/amjKt8om9/oDtNAa2oPVN VWOcQ0GQK9R1KO+H6YKg1rlWialW0UKhgcY8OT8pB/ch2uIjNZ9plYzFEDabDiPXjh4k KQVvryQHTBB/D/vZExUqxoMmfsQRX428OUcXfu5wway8o/M+J08MDrRZG6yqS7PA8Nu8 ZgSQ== X-Gm-Message-State: AGRZ1gI5ADRnGAw312E9Qv1+92Dh+NbdnERoI1rWg4vyJD0JBlpnMdFd ah/ADlUzqeE/5cHkXelbCZ8= X-Google-Smtp-Source: AJdET5daG9t1xJkmSRzpif4lKnsWw7H+0IaiNx/01cEGo3RhZU2iNgah+uTrlv+36d6JFBFPwwuwwQ== X-Received: by 2002:a62:5904:: with SMTP id n4-v6mr10465640pfb.174.1541469848604; Mon, 05 Nov 2018 18:04:08 -0800 (PST) Received: from localhost (61-220-137-37.HINET-IP.hinet.net. [61.220.137.37]) by smtp.gmail.com with ESMTPSA id 188-v6sm27858805pfy.87.2018.11.05.18.04.07 (version=TLS1_2 cipher=ECDHE-RSA-CHACHA20-POLY1305 bits=256/256); Mon, 05 Nov 2018 18:04:07 -0800 (PST) From: AceLan Kao To: Keith Busch , Jens Axboe , Christoph Hellwig , Sagi Grimberg , Bjorn Helgaas , linux-nvme@lists.infradead.org, linux-kernel@vger.kernel.org, linux-pci@vger.kernel.org Subject: [PATCH 2/2] nvme: add quirk to not call disable function when suspending Date: Tue, 6 Nov 2018 10:04:02 +0800 Message-Id: <20181106020402.21120-2-acelan.kao@canonical.com> X-Mailer: git-send-email 2.17.1 In-Reply-To: <20181106020402.21120-1-acelan.kao@canonical.com> References: <20181106020402.21120-1-acelan.kao@canonical.com> Sender: linux-pci-owner@vger.kernel.org Precedence: bulk List-ID: X-Mailing-List: linux-pci@vger.kernel.org X-Virus-Scanned: ClamAV using ClamSMTP Call nvme_dev_disable() function leads to the power consumption goes up to 2.2 Watt during suspend-to-idle, and from SK hynix FE, they suggest us to use its own APST feature to do the power management during s2idle. After D3 is diabled and nvme_dev_disable() is not called while suspending, the power consumption drops to 0.77 Watt during s2idle. Signed-off-by: AceLan Kao --- drivers/nvme/host/nvme.h | 5 +++++ drivers/nvme/host/pci.c | 8 +++++++- 2 files changed, 12 insertions(+), 1 deletion(-) diff --git a/drivers/nvme/host/nvme.h b/drivers/nvme/host/nvme.h index cee79cb388af..35d260a4cf46 100644 --- a/drivers/nvme/host/nvme.h +++ b/drivers/nvme/host/nvme.h @@ -90,6 +90,11 @@ enum nvme_quirks { * Set MEDIUM priority on SQ creation */ NVME_QUIRK_MEDIUM_PRIO_SQ = (1 << 7), + + /* + * Do not disable nvme when suspending(s2idle) + */ + NVME_QUIRK_NO_DISABLE = (1 << 8), }; /* diff --git a/drivers/nvme/host/pci.c b/drivers/nvme/host/pci.c index c33bb201b884..586f3516e36b 100644 --- a/drivers/nvme/host/pci.c +++ b/drivers/nvme/host/pci.c @@ -31,6 +31,7 @@ #include #include #include +#include #include "nvme.h" @@ -2612,8 +2613,11 @@ static int nvme_suspend(struct device *dev) { struct pci_dev *pdev = to_pci_dev(dev); struct nvme_dev *ndev = pci_get_drvdata(pdev); + struct nvme_ctrl *ctrl = &ndev->ctrl; + + if (!(pm_suspend_via_s2idle() && (ctrl->quirks & NVME_QUIRK_NO_DISABLE))) + nvme_dev_disable(ndev, true); - nvme_dev_disable(ndev, true); return 0; } @@ -2716,6 +2720,8 @@ static const struct pci_device_id nvme_id_table[] = { .driver_data = NVME_QUIRK_LIGHTNVM, }, { PCI_DEVICE(0x1d1d, 0x2601), /* CNEX Granby */ .driver_data = NVME_QUIRK_LIGHTNVM, }, + { PCI_DEVICE(0x1c5c, 0x1527), /* Sk Hynix */ + .driver_data = NVME_QUIRK_NO_DISABLE, }, { PCI_DEVICE_CLASS(PCI_CLASS_STORAGE_EXPRESS, 0xffffff) }, { PCI_DEVICE(PCI_VENDOR_ID_APPLE, 0x2001) }, { PCI_DEVICE(PCI_VENDOR_ID_APPLE, 0x2003) },