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=-9.8 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 E555BC83006 for ; Tue, 28 Apr 2020 13:12:00 +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 B88CA206A1 for ; Tue, 28 Apr 2020 13:12:00 +0000 (UTC) Authentication-Results: mail.kernel.org; dkim=pass (2048-bit key) header.d=lists.infradead.org header.i=@lists.infradead.org header.b="AQNG0YCO" DMARC-Filter: OpenDMARC Filter v1.3.2 mail.kernel.org B88CA206A1 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=bzY1sFsV2tSIq5zY40h6dRmWIB3wOkCXg9/UFhmzCho=; b=AQNG0YCOteCH8l r0Qm0woDBUbow34saudAHZJFwQ8i6RfNoqHs1IYxBipgl8ppOm5O+QtZB2tFxKxBDNBMR2JEp6sy8 w/H2lPcbHOrEO4RSdRKaPjAOMgQ2HSjJxz+S9PXo+WHPNKSK2bhTCzd5Sk2n9/sItQSc7FD0dOUS7 nc5MOF7X9dWLbnNa1R2LT7xEoqZT8eCYOEX+BaCbkdYubKwWt3dj27DodHVxalaNcqq3/UfZsVlqc yAjbYcESnCO6LZaraTzUzx0sfdtaHz7XRU0+Gq/ZbRAywLgpR59CKzKhl2BjbF471htMxJ7zkdCOG 9G8sSw8hgCPemCn12RsQ==; 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 1jTQ1k-0003S0-6d; Tue, 28 Apr 2020 13:11:56 +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 1jTQ1X-0003HU-SI for linux-nvme@lists.infradead.org; Tue, 28 Apr 2020 13:11:46 +0000 Received: from Internal Mail-Server by MTLPINE1 (envelope-from maxg@mellanox.com) with ESMTPS (AES256-SHA encrypted); 28 Apr 2020 16:11:37 +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 03SDBZZ1028635; Tue, 28 Apr 2020 16:11:36 +0300 From: Max Gurtovoy To: maxg@mellanox.com, linux-nvme@lists.infradead.org, kbusch@kernel.org, hch@lst.de, sagi@grimberg.me, martin.petersen@oracle.com, jsmart2021@gmail.com, axboe@kernel.dk Subject: [PATCH 06/15] nvme: introduce NVME_INLINE_MD_SG_CNT Date: Tue, 28 Apr 2020 16:11:26 +0300 Message-Id: <20200428131135.211521-7-maxg@mellanox.com> X-Mailer: git-send-email 2.21.0 In-Reply-To: <20200428131135.211521-1-maxg@mellanox.com> References: <20200428131135.211521-1-maxg@mellanox.com> MIME-Version: 1.0 X-CRM114-Version: 20100106-BlameMichelson ( TRE 0.8.0 (BSD) ) MR-646709E3 X-CRM114-CacheID: sfid-20200428_061144_355880_B31DD515 X-CRM114-Status: UNSURE ( 7.42 ) 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: vladimirk@mellanox.com, shlomin@mellanox.com, israelr@mellanox.com, idanb@mellanox.com, oren@mellanox.com, nitzanc@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 Reviewed-by: Christoph Hellwig --- 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 a9c3d82..f13c483 100644 --- a/drivers/nvme/host/nvme.h +++ b/drivers/nvme/host/nvme.h @@ -31,8 +31,10 @@ #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