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 bombadil.infradead.org (bombadil.infradead.org [198.137.202.133]) (using TLSv1.2 with cipher ECDHE-RSA-AES256-GCM-SHA384 (256/256 bits)) (No client certificate requested) by smtp.lore.kernel.org (Postfix) with ESMTPS id C1916C433EF for ; Sat, 27 Nov 2021 01:57:25 +0000 (UTC) DKIM-Signature: v=1; a=rsa-sha256; q=dns/txt; c=relaxed/relaxed; d=lists.infradead.org; s=bombadil.20210309; h=Sender: Content-Transfer-Encoding:Content-Type:List-Subscribe:List-Help:List-Post: List-Archive:List-Unsubscribe:List-Id:Date:MIME-Version:References:Subject:Cc :To:From:Message-ID:Reply-To:Content-ID:Content-Description:Resent-Date: Resent-From:Resent-Sender:Resent-To:Resent-Cc:Resent-Message-ID:In-Reply-To: List-Owner; bh=af+7jN8/PZhq0vBb/HK+4YOLQKzW4BMGBaoArTHm4Fk=; b=deGxA8C1iWiPpP R69d/342p3m6ci4tKYFNgAkmlmch0rVeRW7KoNfqXXh+mzCbiiszsQRNvgddRmjs8QwKcp+XKQYW4 xz0qBdkjSZvb77bymFU1v1zcYx/Z0OK8+/lRrneNvqIzKev8ET7YGi2WIk2SpUCEGkGQI/mPJh2Jz RRy7kMVMyULSQS55Kn4NEOlNZ7HCT1YHljomz18AJQRYugYHlyJ9CRHTUgEV1rTnAs5yYHh6EflSC rZjghsUMeQHFAIQj9j/89F20Y8CRiCbEXifK1ZgrApVcSDiTU/cmtqunLc4eXkt4w/6CQ28Hg+SB0 n6POkxOTx0yqCTv35pTQ==; Received: from localhost ([::1] helo=bombadil.infradead.org) by bombadil.infradead.org with esmtp (Exim 4.94.2 #2 (Red Hat Linux)) id 1mqmwH-00CQPt-Eq; Sat, 27 Nov 2021 01:55:42 +0000 Received: from galois.linutronix.de ([193.142.43.55]) by bombadil.infradead.org with esmtps (Exim 4.94.2 #2 (Red Hat Linux)) id 1mqmP4-00CAV6-BH for linux-arm-kernel@lists.infradead.org; Sat, 27 Nov 2021 01:21:24 +0000 Message-ID: <20211126230524.045836616@linutronix.de> DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=linutronix.de; s=2020; t=1637976081; 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=6M1tvQVxDKTLunwyY5ENMp/fgv1O4+f2pv6jOyEcyuQ=; b=RoMaeYBXqfvYikW2dyCuxJ6KQSj+1Alpl5ig7CgptFI22cFUVZ2ULVY63sEGGRgCSf1Igh 8JyvZZFaDPIGtkI+/xIUsZ5QMDtG8EMnNXtfwFWvS0ipnAar67OgIF+f2WY8/7B4eKwuSY LlJK6duEPSiwZhWR0pTRi45NEGtrsIbGBoBibV4jKgZDRoq0hMMSdnd0pYgTNnLu4pZhWb WvVFk+IMY0CTCZ7Q2vjNzcb3Ev7pcl7fx3s/+XLebe0hyqsJzk8xiBHsLvyUz+iakbh+Cj Zg91ToKJg2PkwD6RsLPUH+YZPOf//dmX6sgW/0/aFuEIkbJSxRHh2K1ivmlRUA== DKIM-Signature: v=1; a=ed25519-sha256; c=relaxed/relaxed; d=linutronix.de; s=2020e; t=1637976081; 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=6M1tvQVxDKTLunwyY5ENMp/fgv1O4+f2pv6jOyEcyuQ=; b=MfwoEOsvNa0S4UjUhiikhPEJC3UcLIA2qNYJfS2PbS9nj/LtcUOLRj2Fjr51lEk7LBBF52 1WIAe9cPjD1QU0CA== 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, Greg Kroah-Hartman , 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, x86@kernel.org, Vinod Koul , Mark Rutland , Will Deacon , Sinan Kaya Subject: [patch 02/37] device: Add device::msi_data pointer and struct msi_device_data References: <20211126224100.303046749@linutronix.de> MIME-Version: 1.0 Date: Sat, 27 Nov 2021 02:21:20 +0100 (CET) X-CRM114-Version: 20100106-BlameMichelson ( TRE 0.8.0 (BSD) ) MR-646709E3 X-CRM114-CacheID: sfid-20211126_172122_552008_1464BBDE X-CRM114-Status: GOOD ( 17.01 ) X-BeenThere: linux-arm-kernel@lists.infradead.org X-Mailman-Version: 2.1.34 Precedence: list List-Id: List-Unsubscribe: , List-Archive: List-Post: List-Help: List-Subscribe: , Content-Type: text/plain; charset="us-ascii" Content-Transfer-Encoding: 7bit Sender: "linux-arm-kernel" Errors-To: linux-arm-kernel-bounces+linux-arm-kernel=archiver.kernel.org@lists.infradead.org Message-ID: <20211127012120.LYB_iF3ZDt9hkJH_MqyIgK0ip-tw8GUCYssPNMtz_5I@z> Create struct msi_device_data and add a pointer of that type to struct dev_msi_info, which is part of struct device. Provide an allocator function which can be invoked from the MSI interrupt allocation code pathes. Signed-off-by: Thomas Gleixner --- include/linux/device.h | 5 +++++ include/linux/msi.h | 12 +++++++++++- kernel/irq/msi.c | 33 +++++++++++++++++++++++++++++++++ 3 files changed, 49 insertions(+), 1 deletion(-) --- a/include/linux/device.h +++ b/include/linux/device.h @@ -45,6 +45,7 @@ struct iommu_ops; struct iommu_group; struct dev_pin_info; struct dev_iommu; +struct msi_device_data; /** * struct subsys_interface - interfaces to device functions @@ -374,11 +375,15 @@ struct dev_links_info { /** * struct dev_msi_info - Device data related to MSI * @domain: The MSI interrupt domain associated to the device + * @data: Pointer to MSI device data */ struct dev_msi_info { #ifdef CONFIG_GENERIC_MSI_IRQ_DOMAIN struct irq_domain *domain; #endif +#ifdef CONFIG_GENERIC_MSI_IRQ + struct msi_device_data *data; +#endif }; /** --- a/include/linux/msi.h +++ b/include/linux/msi.h @@ -2,6 +2,7 @@ #ifndef LINUX_MSI_H #define LINUX_MSI_H +#include #include #include @@ -170,6 +171,16 @@ struct msi_desc { }; }; +/** + * msi_device_data - MSI per device data + * @lock: Spinlock to protect register access + */ +struct msi_device_data { + raw_spinlock_t lock; +}; + +int msi_setup_device_data(struct device *dev); + /* Helpers to hide struct msi_desc implementation details */ #define msi_desc_to_dev(desc) ((desc)->dev) #define dev_to_msi_list(dev) (&(dev)->msi_list) @@ -185,7 +196,6 @@ struct msi_desc { for (__irq = (desc)->irq; \ __irq < ((desc)->irq + (desc)->nvec_used); \ __irq++) - #ifdef CONFIG_IRQ_MSI_IOMMU static inline const void *msi_desc_get_iommu_cookie(struct msi_desc *desc) { --- a/kernel/irq/msi.c +++ b/kernel/irq/msi.c @@ -73,6 +73,39 @@ void get_cached_msi_msg(unsigned int irq } EXPORT_SYMBOL_GPL(get_cached_msi_msg); +static void msi_device_data_release(struct device *dev, void *res) +{ + WARN_ON_ONCE(!list_empty(&dev->msi_list)); + dev->msi.data = NULL; +} + +/** + * msi_setup_device_data - Setup MSI device data + * @dev: Device for which MSI device data should be set up + * + * Return: 0 on success, appropriate error code otherwise + * + * This can be called more than once for @dev. If the MSI device data is + * already allocated the call succeeds. The allocated memory is + * automatically released when the device is destroyed. + */ +int msi_setup_device_data(struct device *dev) +{ + struct msi_device_data *md; + + if (dev->msi.data) + return 0; + + md = devres_alloc(msi_device_data_release, sizeof(*md), GFP_KERNEL); + if (!md) + return -ENOMEM; + + raw_spin_lock_init(&md->lock); + dev->msi.data = md; + devres_add(dev, md); + return 0; +} + #ifdef CONFIG_SYSFS static ssize_t msi_mode_show(struct device *dev, struct device_attribute *attr, char *buf) _______________________________________________ linux-arm-kernel mailing list linux-arm-kernel@lists.infradead.org http://lists.infradead.org/mailman/listinfo/linux-arm-kernel