[patch V2 18/33] genirq/msi: Provide struct msi_map

Thomas Gleixner
2022-11-21T14:39:15Z

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);

/**