From patchwork Mon Dec 6 22:39:07 2021 Content-Type: text/plain; charset="utf-8" MIME-Version: 1.0 Content-Transfer-Encoding: 7bit X-Patchwork-Submitter: Thomas Gleixner X-Patchwork-Id: 12660015 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 0A2D8C4321E for ; Mon, 6 Dec 2021 22:39:14 +0000 (UTC) Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S1358155AbhLFWml (ORCPT ); Mon, 6 Dec 2021 17:42:41 -0500 Received: from Galois.linutronix.de ([193.142.43.55]:46598 "EHLO galois.linutronix.de" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S1358099AbhLFWmh (ORCPT ); Mon, 6 Dec 2021 17:42:37 -0500 Message-ID: <20211206210438.038137622@linutronix.de> DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=linutronix.de; s=2020; t=1638830347; h=from:from:reply-to:subject:subject:date:date:message-id:message-id: to:to:cc:cc:mime-version:mime-version:content-type:content-type: references:references; bh=SYbFcr5c7KUWSHju+5I0IZIliBz6/Q8qUXyaiieHdzI=; b=QvCNlsxjJjFZJgdde3bGSosu1Zdk5YzAknkSMOft0kqiy9khbJfX0meWwgcleEXmkDpA6Q pG/Gt8h3frgjkaLd3ivOghbKjLxFmVn7ZXBj/mBWPosAprC3e9ZHf2CQd0vU4uQ0IX2bE3 DIcgOht4L7EcSFUc1y8KcKQOXCGCoLvR8+gBUOfdkCyyDoD2dk/RibJIph/TJLoLZ7f837 ZaxpD6IoMjaAa3AZwL6mF/gFVnlia7coMdHC/mzGWQ3H+AQZsfBC4WUoKRYdhOXhOCt3so 5Zuawua4YMWcs7mWRz8XfmGZQAu6rLWJuZkYFq9LaGCnoqpDI0WCTFWoz6TTeA== DKIM-Signature: v=1; a=ed25519-sha256; c=relaxed/relaxed; d=linutronix.de; s=2020e; t=1638830347; h=from:from:reply-to:subject:subject:date:date:message-id:message-id: to:to:cc:cc:mime-version:mime-version:content-type:content-type: references:references; bh=SYbFcr5c7KUWSHju+5I0IZIliBz6/Q8qUXyaiieHdzI=; b=PCtebedJJL6H3PzvHb4O9yvA3iLADUQUECYtjroor4l+G6aeGCknrkbTtlePQLRiYJQoK7 PSwmm0rD4obkidBw== From: Thomas Gleixner To: LKML Cc: Bjorn Helgaas , Marc Zygnier , Alex Williamson , Kevin Tian , Jason Gunthorpe , Megha Dey , Ashok Raj , linux-pci@vger.kernel.org, Cedric Le Goater , xen-devel@lists.xenproject.org, Juergen Gross , Greg Kroah-Hartman , Will Deacon , Santosh Shilimkar , iommu@lists.linux-foundation.org, dmaengine@vger.kernel.org, Stuart Yoder , Laurentiu Tudor , Nishanth Menon , Tero Kristo , linux-arm-kernel@lists.infradead.org, Vinod Koul , Mark Rutland , Robin Murphy , Sinan Kaya Subject: [patch V2 07/36] genirq/msi: Provide msi_device_populate/destroy_sysfs() References: <20211206210307.625116253@linutronix.de> MIME-Version: 1.0 Date: Mon, 6 Dec 2021 23:39:07 +0100 (CET) Precedence: bulk List-ID: X-Mailing-List: dmaengine@vger.kernel.org Add new allocation functions which can be activated by domain info flags. They store the groups pointer in struct msi_device_data. Signed-off-by: Thomas Gleixner Reviewed-by: Greg Kroah-Hartman Reviewed-by: Jason Gunthorpe --- include/linux/msi.h | 4 ++++ kernel/irq/msi.c | 42 ++++++++++++++++++++++++++++++++++++++++-- 2 files changed, 44 insertions(+), 2 deletions(-) --- a/include/linux/msi.h +++ b/include/linux/msi.h @@ -56,6 +56,8 @@ struct irq_data; struct msi_desc; struct pci_dev; struct platform_msi_priv_data; +struct attribute_group; + void __get_cached_msi_msg(struct msi_desc *entry, struct msi_msg *msg); #ifdef CONFIG_GENERIC_MSI_IRQ void get_cached_msi_msg(unsigned int irq, struct msi_msg *msg); @@ -174,9 +176,11 @@ struct msi_desc { /** * msi_device_data - MSI per device data * @properties: MSI properties which are interesting to drivers + * @attrs: Pointer to the sysfs attribute group */ struct msi_device_data { unsigned long properties; + const struct attribute_group **attrs; }; int msi_setup_device_data(struct device *dev); --- a/kernel/irq/msi.c +++ b/kernel/irq/msi.c @@ -213,6 +213,20 @@ const struct attribute_group **msi_popul } /** + * msi_device_populate_sysfs - Populate msi_irqs sysfs entries for a device + * @dev: The device (PCI, platform etc) which will get sysfs entries + */ +int msi_device_populate_sysfs(struct device *dev) +{ + const struct attribute_group **group = msi_populate_sysfs(dev); + + if (IS_ERR(group)) + return PTR_ERR(group); + dev->msi.data->attrs = group; + return 0; +} + +/** * msi_destroy_sysfs - Destroy msi_irqs sysfs entries for devices * @dev: The device(PCI, platform etc) who will remove sysfs entries * @msi_irq_groups: attribute_group for device msi_irqs entries @@ -238,6 +252,17 @@ void msi_destroy_sysfs(struct device *de kfree(msi_irq_groups); } } + +/** + * msi_device_destroy_sysfs - Destroy msi_irqs sysfs entries for a device + * @dev: The device (PCI, platform etc) for which to remove + * sysfs entries + */ +void msi_device_destroy_sysfs(struct device *dev) +{ + msi_destroy_sysfs(dev, dev->msi.data->attrs); + dev->msi.data->attrs = NULL; +} #endif #ifdef CONFIG_GENERIC_MSI_IRQ_DOMAIN @@ -685,8 +710,19 @@ int msi_domain_alloc_irqs(struct irq_dom { struct msi_domain_info *info = domain->host_data; struct msi_domain_ops *ops = info->ops; + int ret; - return ops->domain_alloc_irqs(domain, dev, nvec); + ret = ops->domain_alloc_irqs(domain, dev, nvec); + if (ret) + return ret; + + if (!(info->flags & MSI_FLAG_DEV_SYSFS)) + return 0; + + ret = msi_device_populate_sysfs(dev); + if (ret) + msi_domain_free_irqs(domain, dev); + return ret; } void __msi_domain_free_irqs(struct irq_domain *domain, struct device *dev) @@ -725,7 +761,9 @@ void msi_domain_free_irqs(struct irq_dom struct msi_domain_info *info = domain->host_data; struct msi_domain_ops *ops = info->ops; - return ops->domain_free_irqs(domain, dev); + if (info->flags & MSI_FLAG_DEV_SYSFS) + msi_device_destroy_sysfs(dev); + ops->domain_free_irqs(domain, dev); } /**