[patch V4 04/21] irqchip/irq-msi-lib: Prepare for PCI MSI/MSIX
From: Thomas Gleixner <hidden>
Date: 2024-06-23 15:18:40
Also in:
linux-pci, lkml
Subsystem:
irqchip drivers, the rest · Maintainers:
Thomas Gleixner, Linus Torvalds
From: Thomas Gleixner <redacted> 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 <redacted> Signed-off-by: Anna-Maria Behnsen <anna-maria@linutronix.de> Signed-off-by: Shivamurthy Shastri <redacted> Signed-off-by: Thomas Gleixner <redacted> --- 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 --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);
--
2.34.1