From mboxrd@z Thu Jan 1 00:00:00 1970 Return-Path: X-Spam-Checker-Version: SpamAssassin 3.4.0 (2014-02-07) on aws-us-west-2-korg-lkml-1.web.codeaurora.org X-Spam-Level: X-Spam-Status: No, score=-7.5 required=3.0 tests=HEADER_FROM_DIFFERENT_DOMAINS, INCLUDES_PATCH,MAILING_LIST_MULTI,SIGNED_OFF_BY,SPF_HELO_NONE,SPF_PASS, URIBL_BLOCKED,URIBL_SBL,URIBL_SBL_A,USER_AGENT_SANE_1 autolearn=ham autolearn_force=no version=3.4.0 Received: from mail.kernel.org (mail.kernel.org [198.145.29.99]) by smtp.lore.kernel.org (Postfix) with ESMTP id 9362DC3524A for ; Tue, 4 Feb 2020 03:31:29 +0000 (UTC) Received: from vger.kernel.org (vger.kernel.org [209.132.180.67]) by mail.kernel.org (Postfix) with ESMTP id 6F4CA2084E for ; Tue, 4 Feb 2020 03:31:29 +0000 (UTC) Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S1727023AbgBDDb3 (ORCPT ); Mon, 3 Feb 2020 22:31:29 -0500 Received: from mx2.didichuxing.com ([36.110.17.22]:26978 "HELO bsf02.didichuxing.com" rhost-flags-OK-OK-OK-FAIL) by vger.kernel.org with SMTP id S1726992AbgBDDb2 (ORCPT ); Mon, 3 Feb 2020 22:31:28 -0500 X-ASG-Debug-ID: 1580787085-0e41082815a90740001-Cu09wu Received: from mail.didiglobal.com (localhost [172.20.36.203]) by bsf02.didichuxing.com with ESMTP id rF6RfuAHUpzw13RK; Tue, 04 Feb 2020 11:31:25 +0800 (CST) X-Barracuda-Envelope-From: zhangweiping@didiglobal.com Received: from 192.168.3.9 (172.22.50.20) by BJSGEXMBX03.didichuxing.com (172.20.15.133) with Microsoft SMTP Server (TLS) id 15.0.1473.3; Tue, 4 Feb 2020 11:31:24 +0800 Date: Tue, 4 Feb 2020 11:31:18 +0800 From: Weiping Zhang To: , , , , , , , , CC: , , Subject: [PATCH v5 2/4] nvme: add get_ams for nvme_ctrl_ops Message-ID: <7295788131026077d5dcd004763571bc506df3cb.1580786525.git.zhangweiping@didiglobal.com> X-ASG-Orig-Subj: [PATCH v5 2/4] nvme: add get_ams for nvme_ctrl_ops Mail-Followup-To: axboe@kernel.dk, tj@kernel.org, hch@lst.de, bvanassche@acm.org, kbusch@kernel.org, minwoo.im.dev@gmail.com, tglx@linutronix.de, ming.lei@redhat.com, edmund.nadolski@intel.com, linux-block@vger.kernel.org, cgroups@vger.kernel.org, linux-nvme@lists.infradead.org References: MIME-Version: 1.0 Content-Type: text/plain; charset="us-ascii" Content-Disposition: inline In-Reply-To: User-Agent: Mutt/1.5.21 (2010-09-15) X-Originating-IP: [172.22.50.20] X-ClientProxiedBy: BJEXCAS02.didichuxing.com (172.20.36.211) To BJSGEXMBX03.didichuxing.com (172.20.15.133) X-Barracuda-Connect: localhost[172.20.36.203] X-Barracuda-Start-Time: 1580787085 X-Barracuda-URL: https://bsf02.didichuxing.com:443/cgi-mod/mark.cgi X-Virus-Scanned: by bsmtpd at didichuxing.com X-Barracuda-Scan-Msg-Size: 3211 X-Barracuda-BRTS-Status: 1 X-Barracuda-Bayes: INNOCENT GLOBAL 0.0000 1.0000 -2.0210 X-Barracuda-Spam-Score: -2.02 X-Barracuda-Spam-Status: No, SCORE=-2.02 using global scores of TAG_LEVEL=1000.0 QUARANTINE_LEVEL=1000.0 KILL_LEVEL=1000.0 tests= X-Barracuda-Spam-Report: Code version 3.2, rules version 3.2.3.79763 Rule breakdown below pts rule name description ---- ---------------------- -------------------------------------------------- Sender: linux-block-owner@vger.kernel.org Precedence: bulk List-ID: X-Mailing-List: linux-block@vger.kernel.org The get_ams() will return the AMS(Arbitration Mechanism Selected) from the driver. Signed-off-by: Weiping Zhang --- drivers/nvme/host/core.c | 9 ++++++++- drivers/nvme/host/nvme.h | 1 + drivers/nvme/host/pci.c | 6 ++++++ include/linux/nvme.h | 1 + 4 files changed, 16 insertions(+), 1 deletion(-) diff --git a/drivers/nvme/host/core.c b/drivers/nvme/host/core.c index 6ec03507da68..2275f1756369 100644 --- a/drivers/nvme/host/core.c +++ b/drivers/nvme/host/core.c @@ -2119,6 +2119,7 @@ int nvme_enable_ctrl(struct nvme_ctrl *ctrl) */ unsigned dev_page_min, page_shift = 12; int ret; + u32 ams = NVME_CC_AMS_RR; ret = ctrl->ops->reg_read64(ctrl, NVME_REG_CAP, &ctrl->cap); if (ret) { @@ -2134,11 +2135,17 @@ int nvme_enable_ctrl(struct nvme_ctrl *ctrl) return -ENODEV; } + /* get Arbitration Mechanism Selected */ + if (ctrl->ops->get_ams) { + ctrl->ops->get_ams(ctrl, &ams); + ams &= NVME_CC_AMS_MASK; + } + ctrl->page_size = 1 << page_shift; ctrl->ctrl_config = NVME_CC_CSS_NVM; ctrl->ctrl_config |= (page_shift - 12) << NVME_CC_MPS_SHIFT; - ctrl->ctrl_config |= NVME_CC_AMS_RR | NVME_CC_SHN_NONE; + ctrl->ctrl_config |= ams | NVME_CC_SHN_NONE; ctrl->ctrl_config |= NVME_CC_IOSQES | NVME_CC_IOCQES; ctrl->ctrl_config |= NVME_CC_ENABLE; diff --git a/drivers/nvme/host/nvme.h b/drivers/nvme/host/nvme.h index 1024fec7914c..a1df74f2eed3 100644 --- a/drivers/nvme/host/nvme.h +++ b/drivers/nvme/host/nvme.h @@ -407,6 +407,7 @@ struct nvme_ctrl_ops { void (*submit_async_event)(struct nvme_ctrl *ctrl); void (*delete_ctrl)(struct nvme_ctrl *ctrl); int (*get_address)(struct nvme_ctrl *ctrl, char *buf, int size); + void (*get_ams)(struct nvme_ctrl *ctrl, u32 *ams); }; #ifdef CONFIG_FAULT_INJECTION_DEBUG_FS diff --git a/drivers/nvme/host/pci.c b/drivers/nvme/host/pci.c index 445c2ee2a01d..e460c7310187 100644 --- a/drivers/nvme/host/pci.c +++ b/drivers/nvme/host/pci.c @@ -2688,6 +2688,11 @@ static int nvme_pci_get_address(struct nvme_ctrl *ctrl, char *buf, int size) return snprintf(buf, size, "%s", dev_name(&pdev->dev)); } +static void nvme_pci_get_ams(struct nvme_ctrl *ctrl, u32 *ams) +{ + *ams = NVME_CC_AMS_RR; +} + static const struct nvme_ctrl_ops nvme_pci_ctrl_ops = { .name = "pcie", .module = THIS_MODULE, @@ -2699,6 +2704,7 @@ static const struct nvme_ctrl_ops nvme_pci_ctrl_ops = { .free_ctrl = nvme_pci_free_ctrl, .submit_async_event = nvme_pci_submit_async_event, .get_address = nvme_pci_get_address, + .get_ams = nvme_pci_get_ams, }; static int nvme_dev_map(struct nvme_dev *dev) diff --git a/include/linux/nvme.h b/include/linux/nvme.h index 3d5189f46cb1..6fe9121e4d27 100644 --- a/include/linux/nvme.h +++ b/include/linux/nvme.h @@ -171,6 +171,7 @@ enum { NVME_CC_AMS_RR = 0 << NVME_CC_AMS_SHIFT, NVME_CC_AMS_WRRU = 1 << NVME_CC_AMS_SHIFT, NVME_CC_AMS_VS = 7 << NVME_CC_AMS_SHIFT, + NVME_CC_AMS_MASK = 7 << NVME_CC_AMS_SHIFT, NVME_CC_SHN_NONE = 0 << NVME_CC_SHN_SHIFT, NVME_CC_SHN_NORMAL = 1 << NVME_CC_SHN_SHIFT, NVME_CC_SHN_ABRUPT = 2 << NVME_CC_SHN_SHIFT, -- 2.14.1