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 Received: from vger.kernel.org (vger.kernel.org [23.128.96.18]) by smtp.lore.kernel.org (Postfix) with ESMTP id E6AE3C4332F for ; Tue, 4 Oct 2022 10:56:52 +0000 (UTC) Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S229779AbiJDK4u (ORCPT ); Tue, 4 Oct 2022 06:56:50 -0400 Received: from lindbergh.monkeyblade.net ([23.128.96.19]:39708 "EHLO lindbergh.monkeyblade.net" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S229495AbiJDK4r (ORCPT ); Tue, 4 Oct 2022 06:56:47 -0400 Received: from frasgout.his.huawei.com (frasgout.his.huawei.com [185.176.79.56]) by lindbergh.monkeyblade.net (Postfix) with ESMTPS id 57308543FC; Tue, 4 Oct 2022 03:56:45 -0700 (PDT) Received: from fraeml745-chm.china.huawei.com (unknown [172.18.147.226]) by frasgout.his.huawei.com (SkyGuard) with ESMTP id 4MhZPx1nWzz67mS5; Tue, 4 Oct 2022 18:56:21 +0800 (CST) Received: from lhrpeml500003.china.huawei.com (7.191.162.67) by fraeml745-chm.china.huawei.com (10.206.15.226) with Microsoft SMTP Server (version=TLS1_2, cipher=TLS_ECDHE_RSA_WITH_AES_128_GCM_SHA256) id 15.1.2375.31; Tue, 4 Oct 2022 12:56:42 +0200 Received: from localhost.localdomain (10.69.192.58) by lhrpeml500003.china.huawei.com (7.191.162.67) with Microsoft SMTP Server (version=TLS1_2, cipher=TLS_ECDHE_RSA_WITH_AES_128_GCM_SHA256) id 15.1.2375.31; Tue, 4 Oct 2022 11:56:39 +0100 From: John Garry To: , , CC: , , , , , , , , John Garry Subject: [PATCH v3 0/7] scsi: libsas: Use request tag in more drivers Date: Tue, 4 Oct 2022 19:27:06 +0800 Message-ID: <1664882833-39804-1-git-send-email-john.garry@huawei.com> X-Mailer: git-send-email 2.8.1 MIME-Version: 1.0 Content-Type: text/plain X-Originating-IP: [10.69.192.58] X-ClientProxiedBy: dggems702-chm.china.huawei.com (10.3.19.179) To lhrpeml500003.china.huawei.com (7.191.162.67) X-CFilter-Loop: Reflected Precedence: bulk List-ID: X-Mailing-List: linux-kernel@vger.kernel.org Currently hisi_sas is the only libsas driver which uses the request tag for per-HW IO tag. All other libsas drivers manage the tags internally. Tag management in pm8001 and mvsas is currently using a simple bitmap, so use the request tag when available there. With this change we still need to manage tags for libsas "internal" commands, like SMP commands, and any other private commands so reserve some tags for this: - For pm8001 I went with pre-existing and unused PM8001_RESERVE_SLOT size. The value is 8, which should be enough. It is greater than mvsas, below, but this driver sends a lot of other private commands to HW. - For mvsas I went with 4, which still should be enough. isci and aic9xx have elaborate tag alloc schemes, so I'm not going to bother changing them, especially since I have no HW to test with. Helper sas_task_find_rq() is added to get the request and associated tag per sas_task when it is available. This series looks not to conflict with https://lore.kernel.org/linux-scsi/20220928070130.3657183-1-yanaijie@huawei.com/T/#mefdcb7b63b4e6ebc8b77a689b3923571ab3d33ab Based on https://lore.kernel.org/linux-scsi/1664262298-239952-1-git-send-email-john.garry@huawei.com/T/#t Differences to v2: - Put private tags at bottom of tagset for each driver (Hannes) - Add RB tags from Jason, Jack, and Hannes (thanks!) Differences to v1: - Rework sas_task_find_rq() - Rename tags->rsvd and remove tag size struct arg for both mvsas and pm8001 - Decrement can_queue for mvsas - Use sas_task_find_rq() in pm80xx_chip_get_q_index() - Add Damien's tags (thanks) Igor Pylypiv (1): scsi: pm8001: Remove pm8001_tag_init() John Garry (6): scsi: libsas: Add sas_task_find_rq() scsi: hisi_sas: Use sas_task_find_rq() scsi: hisi_sas: Put reserved tags in lower region of tagset scsi: pm8001: Use sas_task_find_rq() for tagging scsi: mvsas: Delete mvs_tag_init() scsi: mvsas: Use sas_task_find_rq() for tagging drivers/scsi/hisi_sas/hisi_sas_main.c | 38 +++++++++--------------- drivers/scsi/mvsas/mv_defs.h | 1 + drivers/scsi/mvsas/mv_init.c | 11 ++++--- drivers/scsi/mvsas/mv_sas.c | 42 ++++++++++++++------------- drivers/scsi/mvsas/mv_sas.h | 8 +---- drivers/scsi/pm8001/pm8001_init.c | 14 +++------ drivers/scsi/pm8001/pm8001_sas.c | 20 ++++++------- drivers/scsi/pm8001/pm8001_sas.h | 12 +++++--- drivers/scsi/pm8001/pm80xx_hwi.c | 17 ++--------- include/scsi/libsas.h | 18 ++++++++++++ 10 files changed, 85 insertions(+), 96 deletions(-) -- 2.25.1