diff mbox series

[V4,04/21] irqchip/irq-msi-lib: Prepare for PCI MSI/MSIX

Message ID 20240623142234.964056815@linutronix.de (mailing list archive)
State Handled Elsewhere
Delegated to: Bjorn Helgaas
Headers show
Series genirq, irqchip: Convert ARM MSI handling to per device MSI domains | expand

Commit Message

Thomas Gleixner June 23, 2024, 3:18 p.m. UTC 
From: Thomas Gleixner <tglx@linutronix.de>

Add the bus tokens for DOMAIN_BUS_PCI_DEVICE_MSI and
DOMAIN_BUS_PCI_DEVICE_MSIX to the common child init
function.

Provide the match mask which can be used by parent domain
implementation so the bitmask based child bus token match
works.

Signed-off-by: Thomas Gleixner <tglx@linutronix.de>
Signed-off-by: Anna-Maria Behnsen <anna-maria@linutronix.de>
Signed-off-by: Shivamurthy Shastri <shivamurthy.shastri@linutronix.de>
Signed-off-by: Thomas Gleixner <tglx@linutronix.de>


---
v3: removed pci_device_msi_mask_unmask_parent_enable call as there is no
more global static key.
---
 drivers/irqchip/irq-msi-lib.c | 6 ++++++
 drivers/irqchip/irq-msi-lib.h | 6 ++++++
 2 files changed, 12 insertions(+)
diff mbox series

Patch

diff --git a/drivers/irqchip/irq-msi-lib.c b/drivers/irqchip/irq-msi-lib.c
index acbccf8f7f5b..0b359c5d8c6c 100644
--- a/drivers/irqchip/irq-msi-lib.c
+++ b/drivers/irqchip/irq-msi-lib.c
@@ -48,6 +48,12 @@  bool msi_lib_init_dev_msi_info(struct device *dev, struct irq_domain *domain,
 
 	/* Is the target domain bus token supported? */
 	switch(info->bus_token) {
+	case DOMAIN_BUS_PCI_DEVICE_MSI:
+	case DOMAIN_BUS_PCI_DEVICE_MSIX:
+		if (WARN_ON_ONCE(!IS_ENABLED(CONFIG_PCI_MSI)))
+			return false;
+
+		break;
 	default:
 		/*
 		 * This should never be reached. See
diff --git a/drivers/irqchip/irq-msi-lib.h b/drivers/irqchip/irq-msi-lib.h
index f0706cc28264..525aa5284a99 100644
--- a/drivers/irqchip/irq-msi-lib.h
+++ b/drivers/irqchip/irq-msi-lib.h
@@ -9,6 +9,12 @@ 
 #include <linux/irqdomain.h>
 #include <linux/msi.h>
 
+#ifdef CONFIG_PCI_MSI
+#define MATCH_PCI_MSI		BIT(DOMAIN_BUS_PCI_MSI)
+#else
+#define MATCH_PCI_MSI		(0)
+#endif
+
 int msi_lib_irq_domain_select(struct irq_domain *d, struct irq_fwspec *fwspec,
 			      enum irq_domain_bus_token bus_token);