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Message-ID: <20221121083325.846660254@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 V2 06/21] genirq/irqdomain: Provide IRQ_DOMAIN_FLAG_MSI_DEVICE
References: <20221121083210.309161925@linutronix.de>
MIME-Version: 1.0
Content-Type: text/plain; charset=UTF-8
Date:   Mon, 21 Nov 2022 15:36:25 +0100 (CET)
Precedence: bulk

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

Signed-off-by: Thomas Gleixner <tglx@linutronix.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 */