From patchwork Mon Dec 6 22:39:15 2021 Content-Type: text/plain; charset="utf-8" MIME-Version: 1.0 Content-Transfer-Encoding: 7bit X-Patchwork-Submitter: Thomas Gleixner X-Patchwork-Id: 12660157 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 lists.xenproject.org (lists.xenproject.org [192.237.175.120]) (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 C752EC433F5 for ; Mon, 6 Dec 2021 22:47:19 +0000 (UTC) Received: from list by lists.xenproject.org with outflank-mailman.240018.416140 (Exim 4.92) (envelope-from ) id 1muMl7-0002fb-SH; Mon, 06 Dec 2021 22:46:57 +0000 X-Outflank-Mailman: Message body and most headers restored to incoming version Received: by outflank-mailman (output) from mailman id 240018.416140; Mon, 06 Dec 2021 22:46:57 +0000 Received: from localhost ([127.0.0.1] helo=lists.xenproject.org) by lists.xenproject.org with esmtp (Exim 4.92) (envelope-from ) id 1muMl7-0002dh-MV; Mon, 06 Dec 2021 22:46:57 +0000 Received: by outflank-mailman (input) for mailman id 240018; Mon, 06 Dec 2021 22:46:56 +0000 Received: from se1-gles-sth1-in.inumbo.com ([159.253.27.254] helo=se1-gles-sth1.inumbo.com) by lists.xenproject.org with esmtp (Exim 4.92) (envelope-from ) id 1muMdh-0004dp-3I for xen-devel@lists.xenproject.org; Mon, 06 Dec 2021 22:39:17 +0000 Received: from galois.linutronix.de (galois.linutronix.de [193.142.43.55]) by se1-gles-sth1.inumbo.com (Halon) with ESMTPS id 57bd4e38-56e5-11ec-a5e1-b9374ead2679; Mon, 06 Dec 2021 23:39:16 +0100 (CET) X-BeenThere: xen-devel@lists.xenproject.org List-Id: Xen developer discussion List-Unsubscribe: , List-Post: List-Help: List-Subscribe: , Errors-To: xen-devel-bounces@lists.xenproject.org Precedence: list Sender: "Xen-devel" X-Inumbo-ID: 57bd4e38-56e5-11ec-a5e1-b9374ead2679 Message-ID: <20211206210438.310445889@linutronix.de> DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=linutronix.de; s=2020; t=1638830356; 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=ZBun+BNrncmDCLhUClKwPbgoMa6P/CUfRD8LwyZQrQo=; b=VUWn2yBE6rVGlxwZIKOEifvfL36dFtKjNljMPglfHKN+xxitQBAMtTAtm0n/fMScBraHiY /kn0cMLirGCtpjHtlNu6I8c5KOnEwnH8uE5F1LUSus/SuXtaxvg5nqovVbrIsFCCMNPulE /n2C420oBzql78ADdW2D3ZEOkx3tfhh/UXfQYuWNVZyFQXRhEbFeQQL0kisZ2OX2Idd1zj S07xiK3DBX2wJavNmZkz2zbr81t3CwKXgtYv2hSsTo7f/wG5/u/XwsA+eR8dAEzJN78VQQ KciOOQf7xq6cUWFDwDnYmpXqJXzgOJtvQ8JpaCynLP2dVHSQGz67KND8VbOd0g== DKIM-Signature: v=1; a=ed25519-sha256; c=relaxed/relaxed; d=linutronix.de; s=2020e; t=1638830356; 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=ZBun+BNrncmDCLhUClKwPbgoMa6P/CUfRD8LwyZQrQo=; b=t91sG1vrq5IdTONAWnwCE4d78ykskp/XkoupImVqefTn4q8kXJhdDPsvKRrvYXAgmHRVtB ffnB+1ueiPPN+tAA== 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 12/36] platform-msi: Store platform private data pointer in msi_device_data References: <20211206210307.625116253@linutronix.de> MIME-Version: 1.0 Date: Mon, 6 Dec 2021 23:39:15 +0100 (CET) Storing the platform private data in a MSI descriptor is sloppy at best. The data belongs to the device and not to the descriptor. Add a pointer to struct msi_device_data and store the pointer there. Signed-off-by: Thomas Gleixner Reviewed-by: Greg Kroah-Hartman Reviewed-by: Jason Gunthorpe --- drivers/base/platform-msi.c | 79 +++++++++++++++++--------------------------- include/linux/msi.h | 4 +- 2 files changed, 34 insertions(+), 49 deletions(-) --- a/drivers/base/platform-msi.c +++ b/drivers/base/platform-msi.c @@ -38,9 +38,7 @@ static DEFINE_IDA(platform_msi_devid_ida */ static irq_hw_number_t platform_msi_calc_hwirq(struct msi_desc *desc) { - u32 devid; - - devid = desc->platform.msi_priv_data->devid; + u32 devid = desc->dev->msi.data->platform_data->devid; return (devid << (32 - DEV_ID_SHIFT)) | desc->platform.msi_index; } @@ -85,11 +83,8 @@ static void platform_msi_update_dom_ops( static void platform_msi_write_msg(struct irq_data *data, struct msi_msg *msg) { struct msi_desc *desc = irq_data_get_msi_desc(data); - struct platform_msi_priv_data *priv_data; - - priv_data = desc->platform.msi_priv_data; - priv_data->write_msg(desc, msg); + desc->dev->msi.data->platform_data->write_msg(desc, msg); } static void platform_msi_update_chip_ops(struct msi_domain_info *info) @@ -126,9 +121,7 @@ static void platform_msi_free_descs(stru } static int platform_msi_alloc_descs_with_irq(struct device *dev, int virq, - int nvec, - struct platform_msi_priv_data *data) - + int nvec) { struct msi_desc *desc; int i, base = 0; @@ -144,7 +137,6 @@ static int platform_msi_alloc_descs_with if (!desc) break; - desc->platform.msi_priv_data = data; desc->platform.msi_index = base + i; desc->irq = virq ? virq + i : 0; @@ -161,11 +153,9 @@ static int platform_msi_alloc_descs_with return 0; } -static int platform_msi_alloc_descs(struct device *dev, int nvec, - struct platform_msi_priv_data *data) - +static int platform_msi_alloc_descs(struct device *dev, int nvec) { - return platform_msi_alloc_descs_with_irq(dev, 0, nvec, data); + return platform_msi_alloc_descs_with_irq(dev, 0, nvec); } /** @@ -199,9 +189,8 @@ struct irq_domain *platform_msi_create_i return domain; } -static struct platform_msi_priv_data * -platform_msi_alloc_priv_data(struct device *dev, unsigned int nvec, - irq_write_msi_msg_t write_msi_msg) +static int platform_msi_alloc_priv_data(struct device *dev, unsigned int nvec, + irq_write_msi_msg_t write_msi_msg) { struct platform_msi_priv_data *datap; int err; @@ -213,41 +202,44 @@ platform_msi_alloc_priv_data(struct devi * capable devices). */ if (!dev->msi.domain || !write_msi_msg || !nvec || nvec > MAX_DEV_MSIS) - return ERR_PTR(-EINVAL); + return -EINVAL; if (dev->msi.domain->bus_token != DOMAIN_BUS_PLATFORM_MSI) { dev_err(dev, "Incompatible msi_domain, giving up\n"); - return ERR_PTR(-EINVAL); + return -EINVAL; } err = msi_setup_device_data(dev); if (err) - return ERR_PTR(err); + return err; - /* Already had a helping of MSI? Greed... */ - if (!list_empty(dev_to_msi_list(dev))) - return ERR_PTR(-EBUSY); + /* Already initialized? */ + if (dev->msi.data->platform_data) + return -EBUSY; datap = kzalloc(sizeof(*datap), GFP_KERNEL); if (!datap) - return ERR_PTR(-ENOMEM); + return -ENOMEM; datap->devid = ida_simple_get(&platform_msi_devid_ida, 0, 1 << DEV_ID_SHIFT, GFP_KERNEL); if (datap->devid < 0) { err = datap->devid; kfree(datap); - return ERR_PTR(err); + return err; } datap->write_msg = write_msi_msg; datap->dev = dev; - - return datap; + dev->msi.data->platform_data = datap; + return 0; } -static void platform_msi_free_priv_data(struct platform_msi_priv_data *data) +static void platform_msi_free_priv_data(struct device *dev) { + struct platform_msi_priv_data *data = dev->msi.data->platform_data; + + dev->msi.data->platform_data = NULL; ida_simple_remove(&platform_msi_devid_ida, data->devid); kfree(data); } @@ -264,14 +256,13 @@ static void platform_msi_free_priv_data( int platform_msi_domain_alloc_irqs(struct device *dev, unsigned int nvec, irq_write_msi_msg_t write_msi_msg) { - struct platform_msi_priv_data *priv_data; int err; - priv_data = platform_msi_alloc_priv_data(dev, nvec, write_msi_msg); - if (IS_ERR(priv_data)) - return PTR_ERR(priv_data); + err = platform_msi_alloc_priv_data(dev, nvec, write_msi_msg); + if (err) + return err; - err = platform_msi_alloc_descs(dev, nvec, priv_data); + err = platform_msi_alloc_descs(dev, nvec); if (err) goto out_free_priv_data; @@ -284,8 +275,7 @@ int platform_msi_domain_alloc_irqs(struc out_free_desc: platform_msi_free_descs(dev, 0, nvec); out_free_priv_data: - platform_msi_free_priv_data(priv_data); - + platform_msi_free_priv_data(dev); return err; } EXPORT_SYMBOL_GPL(platform_msi_domain_alloc_irqs); @@ -296,15 +286,9 @@ EXPORT_SYMBOL_GPL(platform_msi_domain_al */ void platform_msi_domain_free_irqs(struct device *dev) { - if (!list_empty(dev_to_msi_list(dev))) { - struct msi_desc *desc; - - desc = first_msi_entry(dev); - platform_msi_free_priv_data(desc->platform.msi_priv_data); - } - msi_domain_free_irqs(dev->msi.domain, dev); platform_msi_free_descs(dev, 0, MAX_DEV_MSIS); + platform_msi_free_priv_data(dev); } EXPORT_SYMBOL_GPL(platform_msi_domain_free_irqs); @@ -351,10 +335,11 @@ struct irq_domain * struct irq_domain *domain; int err; - data = platform_msi_alloc_priv_data(dev, nvec, write_msi_msg); - if (IS_ERR(data)) + err = platform_msi_alloc_priv_data(dev, nvec, write_msi_msg); + if (err) return NULL; + data = dev->msi.data->platform_data; data->host_data = host_data; domain = irq_domain_create_hierarchy(dev->msi.domain, 0, is_tree ? 0 : nvec, @@ -372,7 +357,7 @@ struct irq_domain * free_domain: irq_domain_remove(domain); free_priv: - platform_msi_free_priv_data(data); + platform_msi_free_priv_data(dev); return NULL; } @@ -420,7 +405,7 @@ int platform_msi_device_domain_alloc(str struct platform_msi_priv_data *data = domain->host_data; int err; - err = platform_msi_alloc_descs_with_irq(data->dev, virq, nr_irqs, data); + err = platform_msi_alloc_descs_with_irq(data->dev, virq, nr_irqs); if (err) return err; --- a/include/linux/msi.h +++ b/include/linux/msi.h @@ -108,11 +108,9 @@ struct pci_msi_desc { /** * platform_msi_desc - Platform device specific msi descriptor data - * @msi_priv_data: Pointer to platform private data * @msi_index: The index of the MSI descriptor for multi MSI */ struct platform_msi_desc { - struct platform_msi_priv_data *msi_priv_data; u16 msi_index; }; @@ -177,10 +175,12 @@ 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 + * @platform_data: Platform-MSI specific data */ struct msi_device_data { unsigned long properties; const struct attribute_group **attrs; + struct platform_msi_priv_data *platform_data; }; int msi_setup_device_data(struct device *dev);