From patchwork Wed Oct 28 12:33:04 2020 Content-Type: text/plain; charset="utf-8" MIME-Version: 1.0 Content-Transfer-Encoding: 7bit X-Patchwork-Submitter: John Garry X-Patchwork-Id: 311114 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=-6.8 required=3.0 tests=BAYES_00, HEADER_FROM_DIFFERENT_DOMAINS, MAILING_LIST_MULTI, SPF_HELO_NONE, SPF_PASS, USER_AGENT_GIT autolearn=no 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 771E0C55179 for ; Thu, 29 Oct 2020 01:22:21 +0000 (UTC) Received: from vger.kernel.org (vger.kernel.org [23.128.96.18]) by mail.kernel.org (Postfix) with ESMTP id 32A9C20791 for ; Thu, 29 Oct 2020 01:22:21 +0000 (UTC) Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S1729474AbgJ1WEy (ORCPT ); Wed, 28 Oct 2020 18:04:54 -0400 Received: from szxga05-in.huawei.com ([45.249.212.191]:7078 "EHLO szxga05-in.huawei.com" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S1729497AbgJ1WCN (ORCPT ); Wed, 28 Oct 2020 18:02:13 -0400 Received: from DGGEMS401-HUB.china.huawei.com (unknown [172.30.72.58]) by szxga05-in.huawei.com (SkyGuard) with ESMTP id 4CLp3v4wslzLqT4; Wed, 28 Oct 2020 20:36:59 +0800 (CST) Received: from localhost.localdomain (10.69.192.58) by DGGEMS401-HUB.china.huawei.com (10.3.19.201) with Microsoft SMTP Server id 14.3.487.0; Wed, 28 Oct 2020 20:36:47 +0800 From: John Garry To: , , , , CC: , , , , John Garry Subject: [PATCH v2 0/3] Support managed interrupts for platform devices Date: Wed, 28 Oct 2020 20:33:04 +0800 Message-ID: <1603888387-52499-1-git-send-email-john.garry@huawei.com> X-Mailer: git-send-email 2.8.1 MIME-Version: 1.0 X-Originating-IP: [10.69.192.58] X-CFilter-Loop: Reflected Precedence: bulk List-ID: X-Mailing-List: linux-scsi@vger.kernel.org So far, managed interrupts are only used for PCI MSIs. This series add platform device support for managed interrupts. Initially this topic was discussed at [0]. The method to enable managed interrupts is to allocate all the IRQs for the device, and then switch the interrupts to managed - this is done through new function irq_update_affinity_desc(). API platform_get_irqs_affinity() is added as a helper to manage this work, such that we don't need to export irq_update_affinity_desc() or irq_create_affinity_masks(). For now, the HiSilicon SAS v2 hw driver is switched over. This is used in the D05 dev board. Performance gain observed for 6x SAS SSDs is ~357K -> 420K IOPs for fio read. [0] https://lore.kernel.org/lkml/84a9411b-4ae3-1928-3d35-1666f2687ec8@huawei.com/ Changes since v1: - Update authorship on genirq change John Garry (3): genirq/affinity: Add irq_update_affinity_desc() Driver core: platform: Add platform_get_irqs_affinity() scsi: hisi_sas: Expose HW queues for v2 hw drivers/base/platform.c | 58 +++++++++++++++++++++ drivers/scsi/hisi_sas/hisi_sas.h | 4 ++ drivers/scsi/hisi_sas/hisi_sas_main.c | 11 ++++ drivers/scsi/hisi_sas/hisi_sas_v2_hw.c | 71 ++++++++++++++++++++++---- include/linux/interrupt.h | 8 +++ include/linux/platform_device.h | 5 ++ kernel/irq/manage.c | 19 +++++++ 7 files changed, 165 insertions(+), 11 deletions(-) Signed-off-by: John Garry