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=-9.7 required=3.0 tests=DKIMWL_WL_HIGH,DKIM_SIGNED, DKIM_VALID,HEADER_FROM_DIFFERENT_DOMAINS,INCLUDES_PATCH,MAILING_LIST_MULTI, SIGNED_OFF_BY,SPF_HELO_NONE,SPF_PASS,UNPARSEABLE_RELAY,URIBL_BLOCKED, USER_AGENT_GIT 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 7F30DC43331 for ; Fri, 27 Mar 2020 17:18:06 +0000 (UTC) Received: from bombadil.infradead.org (bombadil.infradead.org [198.137.202.133]) (using TLSv1.2 with cipher ECDHE-RSA-AES256-GCM-SHA384 (256/256 bits)) (No client certificate requested) by mail.kernel.org (Postfix) with ESMTPS id E49BF20578 for ; Fri, 27 Mar 2020 17:18:05 +0000 (UTC) Authentication-Results: mail.kernel.org; dkim=pass (2048-bit key) header.d=lists.infradead.org header.i=@lists.infradead.org header.b="cHR2+r0f" DMARC-Filter: OpenDMARC Filter v1.3.2 mail.kernel.org E49BF20578 Authentication-Results: mail.kernel.org; dmarc=fail (p=none dis=none) header.from=mellanox.com Authentication-Results: mail.kernel.org; spf=none smtp.mailfrom=linux-nvme-bounces+linux-nvme=archiver.kernel.org@lists.infradead.org DKIM-Signature: v=1; a=rsa-sha256; q=dns/txt; c=relaxed/relaxed; d=lists.infradead.org; s=bombadil.20170209; h=Sender: Content-Transfer-Encoding:Content-Type:Cc:List-Subscribe:List-Help:List-Post: List-Archive:List-Unsubscribe:List-Id:MIME-Version:References:In-Reply-To: Message-Id:Date:Subject:To:From:Reply-To:Content-ID:Content-Description: Resent-Date:Resent-From:Resent-Sender:Resent-To:Resent-Cc:Resent-Message-ID: List-Owner; bh=tfUs2uY4czFnK5sy65Feo2ldxPlFiyS8Ne9rZ5lsWA0=; b=cHR2+r0fbHgfSk +tp9RDe7+5uWKFdWQhhMcgQAlb+aeJMZG+FpULEKtE7mmVNLdhb/4WCEOUPDKp29AqSWvRjRTkMSt nd/a2oYgsEqmAsBw2j8G20Nwgdf5p+DEProtx8nmMx9EJadgVEt0iGU/JS1ttHRM+1p/hnEs3taoQ VVG7QLcTSgdRbwS1JElGBpH06wVS8OgoAAld0zJ0U6PRBCcq7tL0kJO2VurNTZosFa5PZE9oFTGOQ uePB15dNZXi/ebp8uZm15dxcW+00ihj7q1iF9PZ4nEqmZ31EBpmefPA1egaUoR/kEduv1neSHX/lP H/u2q6wla+/nhxfsVZ9Q==; Received: from localhost ([127.0.0.1] helo=bombadil.infradead.org) by bombadil.infradead.org with esmtp (Exim 4.92.3 #3 (Red Hat Linux)) id 1jHsbr-0000rL-91; Fri, 27 Mar 2020 17:17:31 +0000 Received: from mail-il-dmz.mellanox.com ([193.47.165.129] helo=mellanox.co.il) by bombadil.infradead.org with esmtp (Exim 4.92.3 #3 (Red Hat Linux)) id 1jHsaI-0007rU-Uv for linux-nvme@lists.infradead.org; Fri, 27 Mar 2020 17:16:01 +0000 Received: from Internal Mail-Server by MTLPINE2 (envelope-from maxg@mellanox.com) with ESMTPS (AES256-SHA encrypted); 27 Mar 2020 20:15:47 +0300 Received: from mtr-vdi-031.wap.labs.mlnx. (mtr-vdi-031.wap.labs.mlnx [10.209.102.136]) by labmailer.mlnx (8.13.8/8.13.8) with ESMTP id 02RHFjj9004869; Fri, 27 Mar 2020 20:15:46 +0300 From: Max Gurtovoy To: linux-nvme@lists.infradead.org, kbusch@kernel.org, hch@lst.de, sagi@grimberg.me, martin.petersen@oracle.com, jsmart2021@gmail.com, linux-rdma@vger.kernel.org Subject: [PATCH 06/17] nvme: introduce NVME_INLINE_MD_SG_CNT Date: Fri, 27 Mar 2020 20:15:34 +0300 Message-Id: <20200327171545.98970-8-maxg@mellanox.com> X-Mailer: git-send-email 2.21.0 In-Reply-To: <20200327171545.98970-1-maxg@mellanox.com> References: <20200327171545.98970-1-maxg@mellanox.com> MIME-Version: 1.0 X-CRM114-Version: 20100106-BlameMichelson ( TRE 0.8.0 (BSD) ) MR-646709E3 X-CRM114-CacheID: sfid-20200327_101555_509050_C7FA611C X-CRM114-Status: UNSURE ( 6.71 ) X-CRM114-Notice: Please train this message. X-BeenThere: linux-nvme@lists.infradead.org X-Mailman-Version: 2.1.29 Precedence: list List-Id: List-Unsubscribe: , List-Archive: List-Post: List-Help: List-Subscribe: , Cc: axboe@kernel.dk, vladimirk@mellanox.com, shlomin@mellanox.com, israelr@mellanox.com, idanb@mellanox.com, jgg@mellanox.com, oren@mellanox.com, maxg@mellanox.com Content-Type: text/plain; charset="us-ascii" Content-Transfer-Encoding: 7bit Sender: "linux-nvme" Errors-To: linux-nvme-bounces+linux-nvme=archiver.kernel.org@lists.infradead.org From: Israel Rukshin SGL size of metadata is usually small. Thus, 1 inline sg should cover most cases. The macro will be used for pre-allocate a single SGL entry for metadata. The preallocation of small inline SGLs depends on SG_CHAIN capability so if the ARCH doesn't support SG_CHAIN, use the runtime allocation for the SGL. This patch is a preparation for adding metadata (T10-PI) over fabric support. Signed-off-by: Israel Rukshin Signed-off-by: Max Gurtovoy Reviewed-by: Martin K. Petersen --- drivers/nvme/host/nvme.h | 2 ++ 1 file changed, 2 insertions(+) diff --git a/drivers/nvme/host/nvme.h b/drivers/nvme/host/nvme.h index d132af9..08f470d 100644 --- a/drivers/nvme/host/nvme.h +++ b/drivers/nvme/host/nvme.h @@ -30,8 +30,10 @@ #ifdef CONFIG_ARCH_NO_SG_CHAIN #define NVME_INLINE_SG_CNT 0 +#define NVME_INLINE_MD_SG_CNT 0 #else #define NVME_INLINE_SG_CNT 2 +#define NVME_INLINE_MD_SG_CNT 1 #endif extern struct workqueue_struct *nvme_wq; -- 1.8.3.1 _______________________________________________ linux-nvme mailing list linux-nvme@lists.infradead.org http://lists.infradead.org/mailman/listinfo/linux-nvme