From patchwork Sun Jan 17 14:53:32 2021 Content-Type: text/plain; charset="utf-8" MIME-Version: 1.0 Content-Transfer-Encoding: 7bit X-Patchwork-Submitter: Minwoo Im X-Patchwork-Id: 1427762 Return-Path: X-Original-To: incoming@patchwork.ozlabs.org Delivered-To: patchwork-incoming@bilbo.ozlabs.org Authentication-Results: ozlabs.org; spf=pass (sender SPF authorized) smtp.mailfrom=nongnu.org (client-ip=209.51.188.17; helo=lists.gnu.org; envelope-from=qemu-devel-bounces+incoming=patchwork.ozlabs.org@nongnu.org; receiver=) Authentication-Results: ozlabs.org; dkim=fail reason="signature verification failed" (2048-bit key; unprotected) header.d=gmail.com header.i=@gmail.com header.a=rsa-sha256 header.s=20161025 header.b=oVFDahcw; dkim-atps=neutral Received: from lists.gnu.org (lists.gnu.org [209.51.188.17]) (using TLSv1.2 with cipher ECDHE-RSA-AES256-GCM-SHA384 (256/256 bits)) (No client certificate requested) by ozlabs.org (Postfix) with ESMTPS id 4DJdHc3YhNz9sVs for ; Mon, 18 Jan 2021 01:54:52 +1100 (AEDT) Received: from localhost ([::1]:52276 helo=lists1p.gnu.org) by lists.gnu.org with esmtp (Exim 4.90_1) (envelope-from ) id 1l19S6-0004do-E7 for incoming@patchwork.ozlabs.org; Sun, 17 Jan 2021 09:54:50 -0500 Received: from eggs.gnu.org ([2001:470:142:3::10]:43270) by lists.gnu.org with esmtps (TLS1.2:ECDHE_RSA_AES_256_GCM_SHA384:256) (Exim 4.90_1) (envelope-from ) id 1l19RG-0004PV-A0; Sun, 17 Jan 2021 09:53:58 -0500 Received: from mail-pl1-x62d.google.com ([2607:f8b0:4864:20::62d]:33766) by eggs.gnu.org with esmtps (TLS1.2:ECDHE_RSA_AES_128_GCM_SHA256:128) (Exim 4.90_1) (envelope-from ) id 1l19RE-00041s-Ms; Sun, 17 Jan 2021 09:53:58 -0500 Received: by mail-pl1-x62d.google.com with SMTP id b8so7225507plx.0; Sun, 17 Jan 2021 06:53:56 -0800 (PST) DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=gmail.com; s=20161025; h=from:to:cc:subject:date:message-id:in-reply-to:references; bh=ePUqokcNCu1135M5rENh02CwQRe25aSU4ChI3LMevlI=; b=oVFDahcwk/VlgBvGHute5RnyZCJHUtHYwD5hDY74wTaZi7d6/bWX3jqzPmI3mBPIv5 ZiLPgsRUDvT0eNlqsKWgeNK5FHF8rfT/wvcx3XQL/MUSdbMteBSWrQJ4/eU8pOLSXJQl lpAj8d31UbIpcNvfElFFsWg6AFU6N01+OFc90DthGWfSWYU/nvv6OkG2JzPkSkTR4/SP 3k04ZIC+b6vnL8tGZLlj4QeKpJXEjNokofIINRX+tEGscxMl/aKMqcAUSVMMHYVCZ6dM YLHAULGzmSQNH2+JIxylfUhSOTnMoWHRsAF2nPja9FQYidyjpn6+91uifnB0TZHza0w3 tBFw== X-Google-DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=1e100.net; s=20161025; h=x-gm-message-state:from:to:cc:subject:date:message-id:in-reply-to :references; bh=ePUqokcNCu1135M5rENh02CwQRe25aSU4ChI3LMevlI=; b=tsh1pAqALg4q5l3X59CJM975fcalLIMDp5EVt5/0UNcz489A6nkXwJEmrsNfMN7+Ny DHWZQQ8bR55H8nf25DFrKI9pcq/WUHLmZfc9lxACFyycqtgKzWLlIzKx+T3tN8gaiE23 vG1Ap3AQysJo6bFXmt+1r2z4J7bTWFCTI9e0q4sDfHCI1c5M+FsTBkKHPOKbGAFlekqf B2xB6VEeZUq2CCLXj8I0TyRZM7FTy1kN9I/dzvho3HLoznpzIAEActsMJsr9CJY2pMiL k8vC/U97jwahL3UQbkPWSfakbdrfnBKxuWw3dQgD/w/viL9APBhbk4tX3kYSoaRYrxMv 8Jsg== X-Gm-Message-State: AOAM530EUyoWlLa1jHWU6hI5mYkXmzJahbRxIem/C9flyogwUoQGugP2 n91VVB6A8t2pmKjZzFlSb+IN6JOR8Z+fSA== X-Google-Smtp-Source: ABdhPJyybzm15A2qGJrFId73tfi/KdkvUyFjOu3w+w901eDtchGm1Prd9k7CPCJLnzkYgZ2kLVfDuw== X-Received: by 2002:a17:90a:a415:: with SMTP id y21mr21537663pjp.88.1610895234823; Sun, 17 Jan 2021 06:53:54 -0800 (PST) Received: from localhost.localdomain ([211.108.35.36]) by smtp.gmail.com with ESMTPSA id x127sm13143583pfb.74.2021.01.17.06.53.52 (version=TLS1_3 cipher=TLS_AES_256_GCM_SHA384 bits=256/256); Sun, 17 Jan 2021 06:53:54 -0800 (PST) From: Minwoo Im To: qemu-devel@nongnu.org, qemu-block@nongnu.org Subject: [RFC PATCH V2 02/11] hw/block/nvme: open code for volatile write cache Date: Sun, 17 Jan 2021 23:53:32 +0900 Message-Id: <20210117145341.23310-3-minwoo.im.dev@gmail.com> X-Mailer: git-send-email 2.17.1 In-Reply-To: <20210117145341.23310-1-minwoo.im.dev@gmail.com> References: <20210117145341.23310-1-minwoo.im.dev@gmail.com> Received-SPF: pass client-ip=2607:f8b0:4864:20::62d; envelope-from=minwoo.im.dev@gmail.com; helo=mail-pl1-x62d.google.com X-Spam_score_int: -20 X-Spam_score: -2.1 X-Spam_bar: -- X-Spam_report: (-2.1 / 5.0 requ) BAYES_00=-1.9, DKIM_SIGNED=0.1, DKIM_VALID=-0.1, DKIM_VALID_AU=-0.1, DKIM_VALID_EF=-0.1, FREEMAIL_FROM=0.001, RCVD_IN_DNSWL_NONE=-0.0001, SPF_HELO_NONE=0.001, SPF_PASS=-0.001 autolearn=ham autolearn_force=no X-Spam_action: no action X-BeenThere: qemu-devel@nongnu.org X-Mailman-Version: 2.1.23 Precedence: list List-Id: List-Unsubscribe: , List-Archive: List-Post: List-Help: List-Subscribe: , Cc: Keith Busch , Klaus Jensen , Minwoo Im , Kevin Wolf , Max Reitz Errors-To: qemu-devel-bounces+incoming=patchwork.ozlabs.org@nongnu.org Sender: "Qemu-devel" Volatile Write Cache(VWC) feature is set in nvme_ns_setup() in the initial time. This feature is related to block device backed, but this feature is controlled in controller level via Set/Get Features command. This patch removed dependency between nvme and nvme-ns to manage the VWC flag value. Also, it open coded the Get Features for VWC to check all namespaces attached to the controller, and if false detected, return directly false. Signed-off-by: Minwoo Im Reviewed-by: Klaus Jensen --- hw/block/nvme-ns.c | 4 ---- hw/block/nvme.c | 15 ++++++++++++--- hw/block/nvme.h | 1 - 3 files changed, 12 insertions(+), 8 deletions(-) diff --git a/hw/block/nvme-ns.c b/hw/block/nvme-ns.c index 32662230130b..c403cd36b6bd 100644 --- a/hw/block/nvme-ns.c +++ b/hw/block/nvme-ns.c @@ -89,10 +89,6 @@ static int nvme_ns_init_blk(NvmeCtrl *n, NvmeNamespace *ns, Error **errp) return -1; } - if (blk_enable_write_cache(ns->blkconf.blk)) { - n->features.vwc = 0x1; - } - return 0; } diff --git a/hw/block/nvme.c b/hw/block/nvme.c index cf0fe28fe6eb..b2a9c48a9d81 100644 --- a/hw/block/nvme.c +++ b/hw/block/nvme.c @@ -3033,6 +3033,7 @@ static uint16_t nvme_get_feature(NvmeCtrl *n, NvmeRequest *req) NvmeGetFeatureSelect sel = NVME_GETFEAT_SELECT(dw10); uint16_t iv; NvmeNamespace *ns; + int i; static const uint32_t nvme_feature_default[NVME_FID_MAX] = { [NVME_ARBITRATION] = NVME_ARB_AB_NOLIMIT, @@ -3108,7 +3109,17 @@ static uint16_t nvme_get_feature(NvmeCtrl *n, NvmeRequest *req) result = ns->features.err_rec; goto out; case NVME_VOLATILE_WRITE_CACHE: - result = n->features.vwc; + for (i = 1; i <= n->num_namespaces; i++) { + ns = nvme_ns(n, i); + if (!ns) { + continue; + } + + result = blk_enable_write_cache(ns->blkconf.blk); + if (!result) { + break; + } + } trace_pci_nvme_getfeat_vwcache(result ? "enabled" : "disabled"); goto out; case NVME_ASYNCHRONOUS_EVENT_CONF: @@ -3271,8 +3282,6 @@ static uint16_t nvme_set_feature(NvmeCtrl *n, NvmeRequest *req) ns->features.err_rec = dw11; break; case NVME_VOLATILE_WRITE_CACHE: - n->features.vwc = dw11 & 0x1; - for (i = 1; i <= n->num_namespaces; i++) { ns = nvme_ns(n, i); if (!ns) { diff --git a/hw/block/nvme.h b/hw/block/nvme.h index b7fbcca39d9f..5ba83ee77841 100644 --- a/hw/block/nvme.h +++ b/hw/block/nvme.h @@ -117,7 +117,6 @@ typedef struct NvmeFeatureVal { uint16_t temp_thresh_low; }; uint32_t async_config; - uint32_t vwc; } NvmeFeatureVal; typedef struct NvmeCtrl {