From patchwork Mon Nov 30 17:35:54 2020 Content-Type: text/plain; charset="utf-8" MIME-Version: 1.0 Content-Transfer-Encoding: 7bit X-Patchwork-Submitter: John Garry X-Patchwork-Id: 334721 Delivered-To: patch@linaro.org Received: by 2002:a92:5e16:0:0:0:0:0 with SMTP id s22csp4896774ilb; Mon, 30 Nov 2020 09:42:00 -0800 (PST) X-Google-Smtp-Source: ABdhPJxKe7B6L4gQsXczA6YXFkKVV4wNvJTuA0+q2xEw9T8dZgwlE61C1uqYaiHf63B/SBjkIy7A X-Received: by 2002:aa7:d407:: with SMTP id z7mr23684634edq.234.1606758120342; Mon, 30 Nov 2020 09:42:00 -0800 (PST) ARC-Seal: i=1; a=rsa-sha256; t=1606758120; cv=none; d=google.com; s=arc-20160816; b=LnbBDPakRD+JQY7JQOu8qD8X9qzNamcsoZzC0Lzsl6CqTK5wjqldP0m1ybyouJsDYt pc/RFHf1Rk7/MHCydqzwXzosafE9a0AchUfWK3mQXml1pJEl4dP0l83L4HOrpAzvkfek ye0pVvbqqMEfdfzbSR35EI3cS1IiUdTqAZZ6bEd3e+T97NbXZPZQy6gzBNDNkHQzqC5N RhWfi339pgVTbhY1T4CcJJPQO16Dt4I7IYWBJLYtDoHGwap2B1R1DbgEREGUoF7Oc61e qCsB8AIqoMZ98NBVP1+BxussMycI7XWdXy0ujeYzsK0L/TcKIMhk9W5GSnn+COLj80KV 9bPA== ARC-Message-Signature: i=1; a=rsa-sha256; c=relaxed/relaxed; d=google.com; s=arc-20160816; h=list-id:precedence:mime-version:message-id:date:subject:cc:to:from; bh=LUXhW/xoDo3bkT66iejEjoDff9/pxtfMESiXT/4xesQ=; b=Lk77z6oMuZwgW9n9tls31W+LbtaqisqkyAuDBmm+rCw4s+InyfDNnvXS0zpwyEt1eF /gpARZDXu91/wfPKHBYx16XRt3+9Ek8okEf8cHUJpvqp/gnzgEbMzNmNhYNnXdtXQIg9 2AL9/puerPCIGCcErES2pyoB665HqgStxdLtIIFXh5cl9mThVlG1VPmpfvyYb+6OpG3z GM8qleQYlZn0x0foeR3tYKU8dnTmPh+42QVk/YiDM11UfkTeD0vIPmmoN8FbsTaFCh/a CyEhdKcGD/7LJz5pyD1FCNQkZsZ7BgfKiZPqBEN/s2rej77xkCzVkSf+b9y5almB55HF jy1Q== ARC-Authentication-Results: i=1; mx.google.com; spf=pass (google.com: domain of linux-acpi-owner@vger.kernel.org designates 23.128.96.18 as permitted sender) smtp.mailfrom=linux-acpi-owner@vger.kernel.org Return-Path: Received: from vger.kernel.org (vger.kernel.org. [23.128.96.18]) by mx.google.com with ESMTP id b27si11520228eje.466.2020.11.30.09.41.59; Mon, 30 Nov 2020 09:42:00 -0800 (PST) Received-SPF: pass (google.com: domain of linux-acpi-owner@vger.kernel.org designates 23.128.96.18 as permitted sender) client-ip=23.128.96.18; Authentication-Results: mx.google.com; spf=pass (google.com: domain of linux-acpi-owner@vger.kernel.org designates 23.128.96.18 as permitted sender) smtp.mailfrom=linux-acpi-owner@vger.kernel.org Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S2387571AbgK3Rkq (ORCPT + 5 others); Mon, 30 Nov 2020 12:40:46 -0500 Received: from szxga07-in.huawei.com ([45.249.212.35]:8889 "EHLO szxga07-in.huawei.com" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S1728451AbgK3Rkq (ORCPT ); Mon, 30 Nov 2020 12:40:46 -0500 Received: from DGGEMS413-HUB.china.huawei.com (unknown [172.30.72.58]) by szxga07-in.huawei.com (SkyGuard) with ESMTP id 4ClCCp0bcGz76Ms; Tue, 1 Dec 2020 01:39:34 +0800 (CST) Received: from localhost.localdomain (10.69.192.58) by DGGEMS413-HUB.china.huawei.com (10.3.19.213) with Microsoft SMTP Server id 14.3.487.0; Tue, 1 Dec 2020 01:39:49 +0800 From: John Garry To: , , , , , , CC: , , , , , "John Garry" Subject: [PATCH v4 0/5] Support managed interrupts for platform devices Date: Tue, 1 Dec 2020 01:35:54 +0800 Message-ID: <1606757759-6076-1-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-acpi@vger.kernel.org So far, managed interrupts are only used for PCI MSIs. This series adds platform device support for managed interrupts. Initially this topic was discussed at [0]. The method to enable managed interrupts is to allocate a group of IRQs for the device, and then switch the interrupts to managed - this is done through new function irq_update_affinity_desc(). Function devm_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(). In the devm_platform_get_irqs_affinity() release call a new platform method is used to "put" an irq. The reason for this is that per-irq mapping (and irq_desc) needs to be recreated anew for re-probing the LLDD, such that we don't attempt to reconfigure the managed or any other flag for an irq_desc. 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. This series is tested based on Marc's "MSI: Track device proxying when allocating MSIs" series, [1]. [0] https://lore.kernel.org/lkml/84a9411b-4ae3-1928-3d35-1666f2687ec8@huawei.com/ [1] https://lore.kernel.org/lkml/20201129135208.680293-1-maz@kernel.org/ Changes since v3: - Fix genirq change to re-activate interrupt if we have deactivated it - Remove standalone platform_put_irq(), and combine code into devm_platform_get_irqs_affinity_release() - Add new inline function in ioport.h rather than making acpi_dev_irqresource_disabled() public Changes since v2: - Update genirq change as follows: - Handle when the irq is started, active, or already managed - Reject update when CONFIG_GENERIC_IRQ_RESERVATION_MODE is set - Revamp platform.c API as follows: - Make it devm type - Add platform_put_irq() and associated change in ACPI code to allow irq resource to be reset - Unmap irqs for driver removal - Change API to accept min and max vectors John Garry (5): genirq/affinity: Add irq_update_affinity_desc() resource: Add irqresource_disabled() ACPI: Drop acpi_dev_irqresource_disabled() Driver core: platform: Add devm_platform_get_irqs_affinity() scsi: hisi_sas: Expose HW queues for v2 hw drivers/acpi/resource.c | 17 +--- drivers/base/platform.c | 121 +++++++++++++++++++++++++ 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 | 66 +++++++++++--- include/linux/interrupt.h | 8 ++ include/linux/ioport.h | 7 ++ include/linux/platform_device.h | 6 ++ kernel/irq/manage.c | 63 +++++++++++++ 9 files changed, 278 insertions(+), 25 deletions(-) -- 2.26.2