From patchwork Wed Jul 21 10:42:01 2021 Content-Type: text/plain; charset="utf-8" MIME-Version: 1.0 Content-Transfer-Encoding: 7bit X-Patchwork-Submitter: Damien Le Moal X-Patchwork-Id: 483648 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=-11.6 required=3.0 tests=BAYES_00,DKIM_INVALID, DKIM_SIGNED, HEADER_FROM_DIFFERENT_DOMAINS, INCLUDES_PATCH, MAILING_LIST_MULTI, SPF_HELO_NONE, SPF_PASS, 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 12838C07E9B for ; Wed, 21 Jul 2021 10:48:33 +0000 (UTC) Received: from vger.kernel.org (vger.kernel.org [23.128.96.18]) by mail.kernel.org (Postfix) with ESMTP id DD30D61221 for ; Wed, 21 Jul 2021 10:48:32 +0000 (UTC) Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S238987AbhGUKDW (ORCPT ); Wed, 21 Jul 2021 06:03:22 -0400 Received: from esa3.hgst.iphmx.com ([216.71.153.141]:53605 "EHLO esa3.hgst.iphmx.com" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S238996AbhGUKBn (ORCPT ); Wed, 21 Jul 2021 06:01:43 -0400 DKIM-Signature: v=1; a=rsa-sha256; c=simple/simple; d=wdc.com; i=@wdc.com; q=dns/txt; s=dkim.wdc.com; t=1626864137; x=1658400137; h=from:to:subject:date:message-id:mime-version: content-transfer-encoding; bh=bneDi9dHJOGIRkcB2WJhJfsaHO3P52JDhLKtxKgm0t4=; b=oXQBrsYht4sSIHPz903hkd3etg2nerM3vbZOqe1KR1o0cOIVqI6VWOex pzl+ODswVjtu2GbgVBZH7Ab84UiW6u6IAFoHD4VrkO3K3dBF8JoMe8Syp 4/lY2pc+FhYByD5th1aU84xpWqswlcYJbzEdVcB/lAaH1RFRR6shS4A5C z7NGO1oBR7+BFynLHVKyZtdHPPleEpF83g4mWXyHFSxw3lZ0aLxsan//Q MskQmoadUzkJdJj74iP8/vDpqOY7pVr/68FOu8pc/OW6jlI/OZxmJdUJy FpHsnYskU2Tvl7gT+201YhNnBcLJaC/ZsRHNsZhxSYDjtpeH6rJKt0/Id A==; X-IronPort-AV: E=Sophos;i="5.84,257,1620662400"; d="scan'208";a="179944859" Received: from uls-op-cesaip01.wdc.com (HELO uls-op-cesaep01.wdc.com) ([199.255.45.14]) by ob1.hgst.iphmx.com with ESMTP; 21 Jul 2021 18:42:08 +0800 IronPort-SDR: 75StO+yNg0nFz5qfZiw9VVBZZzorJMFjunXeVEGLiqVmA0pMKXEyDAlCTbMn4yLwYjxZ6PHJYf zo7zBfBNKmCadNs8xRZSugU+MZWLuA9YfEfU5BRJHGOaQuqb2iZPHqkLOjl0s6E8WhMlzzZGwz VjaxcYPcdCXxcsOfRY2XwiioN1DzyLE/Ctt7ukeFA1jKshmA2hH7iQMEkmzT/MtXg8sXidMg5O WzC1j8azysUbvsTt6GWyb0yanGUzHMX6xck+qxzXd09YYHn9VNydU/bIx2M6TJf2w+wvGXpkpZ 5tSozAuMzxy5eeWNOKOdWi65 Received: from uls-op-cesaip02.wdc.com ([10.248.3.37]) by uls-op-cesaep01.wdc.com with ESMTP/TLS/ECDHE-RSA-AES256-GCM-SHA384; 21 Jul 2021 03:20:02 -0700 IronPort-SDR: qoIlJGm06X7y1x0YXibHr6XRp378xp3jvPlllfMJpvOaXpXj/PDqZStcauS/RlBKKushxD0zw6 95032bGd3DEz3zzkOjOqwkTzZ2nYR9yzYxNyyH+D8Pnt3ePlCUw6+jl7M4ZsR2zD1oiXMIS0lh SdzTEH/faexg9Vcx6lFPcfWOHINIk7WE4mZvNJLEzavEgEgj4fAWPJI48AEcWOjBzWhrV0Q1n0 IYkOyPrFq6oxf7pt7CkB37DPzzhSw85+t3pWqDCEo5gIAWMXJZmq1woAXQvy+Y6fk0P807yQdO sXs= WDCIronportException: Internal Received: from washi.fujisawa.hgst.com ([10.149.53.254]) by uls-op-cesaip02.wdc.com with ESMTP; 21 Jul 2021 03:42:08 -0700 From: Damien Le Moal To: linux-block@vger.kernel.org, Jens Axboe , linux-scsi@vger.kernel.org, "Martin K . Petersen" , linux-ide@vger.kernel.org Subject: [PATCH 0/4] Initial support for multi-actuator HDDs Date: Wed, 21 Jul 2021 19:42:01 +0900 Message-Id: <20210721104205.885115-1-damien.lemoal@wdc.com> X-Mailer: git-send-email 2.31.1 MIME-Version: 1.0 Precedence: bulk List-ID: X-Mailing-List: linux-scsi@vger.kernel.org Single LUN multi-actuator hard-disks are cappable to seek and execute multiple commands in parallel. This capability is exposed to the host using the Concurrent Positioning Ranges VPD page (SCSI) and Log (ATA). Each positioning range describes the contiguous set of LBAs that an actuator serves. This series adds support the scsi disk driver to retreive this information and advertize it to user space through sysfs. libata is also modified to handle ATA drives. The first patch adds the block layer plumbing to expose concurrent sector ranges of the device through sysfs as a sub-directory of the device sysfs queue directory. Patch 2 and 3 add support to sd and libata. Finally patch 4 documents the sysfs queue attributed changes. This series does not attempt in any way to optimize accesses to multi-actuator devices (e.g. block IO scheduler or filesystems). This initial support only exposes the actuators information to user space through sysfs. Damien Le Moal (4): block: Add concurrent positioning ranges support scsi: sd: add concurrent positioning ranges support libata: support concurrent positioning ranges log doc: document sysfs queue/cranges attributes Documentation/block/queue-sysfs.rst | 27 ++- block/Makefile | 2 +- block/blk-cranges.c | 286 ++++++++++++++++++++++++++++ block/blk-sysfs.c | 13 ++ block/blk.h | 3 + drivers/ata/libata-core.c | 57 ++++++ drivers/ata/libata-scsi.c | 47 ++++- drivers/scsi/sd.c | 80 ++++++++ drivers/scsi/sd.h | 1 + include/linux/ata.h | 1 + include/linux/blkdev.h | 29 +++ include/linux/libata.h | 11 ++ 12 files changed, 546 insertions(+), 11 deletions(-) create mode 100644 block/blk-cranges.c Reviewed-by: Hannes Reinecke