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Message-ID: <20221124232326.326410494@linutronix.de>
From:   Thomas Gleixner <tglx@linutronix.de>
To:     LKML <linux-kernel@vger.kernel.org>
Cc:     x86@kernel.org, Joerg Roedel <joro@8bytes.org>,
        Will Deacon <will@kernel.org>, linux-pci@vger.kernel.org,
        Bjorn Helgaas <bhelgaas@google.com>,
        Lorenzo Pieralisi <lorenzo.pieralisi@arm.com>,
        Marc Zyngier <maz@kernel.org>,
        Greg Kroah-Hartman <gregkh@linuxfoundation.org>,
        Jason Gunthorpe <jgg@mellanox.com>,
        Dave Jiang <dave.jiang@intel.com>,
        Alex Williamson <alex.williamson@redhat.com>,
        Kevin Tian <kevin.tian@intel.com>,
        Dan Williams <dan.j.williams@intel.com>,
        Logan Gunthorpe <logang@deltatee.com>,
        Ashok Raj <ashok.raj@intel.com>, Jon Mason <jdmason@kudzu.us>,
        Allen Hubbe <allenbh@gmail.com>
Subject: [patch V3 18/33] genirq/msi: Provide struct msi_map
References: <20221124230505.073418677@linutronix.de>
MIME-Version: 1.0
Content-Type: text/plain; charset=UTF-8
Date:   Fri, 25 Nov 2022 00:26:13 +0100 (CET)
Precedence: bulk

A simple struct to hold a MSI index / Linux interrupt number pair. It will
be returned from the dynamic vector allocation function and handed back to
the corresponding free() function.

Signed-off-by: Thomas Gleixner <tglx@linutronix.de>
---
 include/linux/msi_api.h |   13 +++++++++++++
 1 file changed, 13 insertions(+)

--- a/include/linux/msi_api.h
+++ b/include/linux/msi_api.h
@@ -18,6 +18,19 @@ enum msi_domain_ids {
 	MSI_MAX_DEVICE_IRQDOMAINS,
 };
 
+/**
+ * msi_map - Mapping between MSI index and Linux interrupt number
+ * @index:	The MSI index, e.g. slot in the MSI-X table or
+ *		a software managed index if >= 0. If negative
+ *		the allocation function failed and it contains
+ *		the error code.
+ * @virq:	The associated Linux interrupt number
+ */
+struct msi_map {
+	int	index;
+	int	virq;
+};
+
 unsigned int msi_domain_get_virq(struct device *dev, unsigned int domid, unsigned int index);
 
 /**