linux-kernel - [patch 05/20] genirq/irqdomain: Provide IRQ_DOMAIN_FLAG_MSI

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Date:   Fri, 11 Nov 2022 14:56:45 +0100 (CET)
From:   Thomas Gleixner <tglx@...utronix.de>
To:     LKML <linux-kernel@...r.kernel.org>
Cc:     x86@...nel.org, Joerg Roedel <joro@...tes.org>,
        Will Deacon <will@...nel.org>, linux-pci@...r.kernel.org,
        Bjorn Helgaas <bhelgaas@...gle.com>,
        Lorenzo Pieralisi <lorenzo.pieralisi@....com>,
        Marc Zyngier <maz@...nel.org>,
        Greg Kroah-Hartman <gregkh@...uxfoundation.org>,
        Jason Gunthorpe <jgg@...lanox.com>,
        Dave Jiang <dave.jiang@...el.com>,
        Alex Williamson <alex.williamson@...hat.com>,
        Kevin Tian <kevin.tian@...el.com>,
        Dan Williams <dan.j.williams@...el.com>,
        Logan Gunthorpe <logang@...tatee.com>,
        Ashok Raj <ashok.raj@...el.com>, Jon Mason <jdmason@...zu.us>,
        Allen Hubbe <allenbh@...il.com>,
        "Ahmed S. Darwish" <darwi@...utronix.de>,
        Reinette Chatre <reinette.chatre@...el.com>
Subject: [patch 05/20] genirq/irqdomain: Provide IRQ_DOMAIN_FLAG_MSI_DEVICE

Similar to marking parent MSI domains it's required to identify per device
domains. Add flag and helpers.

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

--- a/include/linux/irqdomain.h
+++ b/include/linux/irqdomain.h
@@ -192,6 +192,9 @@ enum {
 	/* Irq domain is a MSI parent domain */
 	IRQ_DOMAIN_FLAG_MSI_PARENT	= (1 << 8),
 
+	/* Irq domain is a MSI device domain */
+	IRQ_DOMAIN_FLAG_MSI_DEVICE	= (1 << 9),
+
 	/*
 	 * Flags starting from IRQ_DOMAIN_FLAG_NONCORE are reserved
 	 * for implementation specific purposes and ignored by the
@@ -559,6 +562,11 @@ static inline bool irq_domain_is_msi_par
 	return domain->flags & IRQ_DOMAIN_FLAG_MSI_PARENT;
 }
 
+static inline bool irq_domain_is_msi_device(struct irq_domain *domain)
+{
+	return domain->flags & IRQ_DOMAIN_FLAG_MSI_DEVICE;
+}
+
 #else	/* CONFIG_IRQ_DOMAIN_HIERARCHY */
 static inline int irq_domain_alloc_irqs(struct irq_domain *domain,
 			unsigned int nr_irqs, int node, void *arg)
@@ -609,6 +617,11 @@ static inline bool irq_domain_is_msi_par
 {
 	return false;
 }
+
+static inline bool irq_domain_is_msi_device(struct irq_domain *domain)
+{
+	return false;
+}
 
 #endif	/* CONFIG_IRQ_DOMAIN_HIERARCHY */