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genirq/msi: Provide struct msi_map

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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>
Reviewed-by: Kevin Tian <kevin.tian@intel.com>
Acked-by: Marc Zyngier <maz@kernel.org>
Link: https://lore.kernel.org/r/20221124232326.326410494@linutronix.de
This commit is contained in:
Thomas Gleixner 2022-11-25 00:26:13 +01:00
parent 4d5a4ccc51
commit 06bff9e347
1 changed files with 13 additions and 0 deletions
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13
include/linux/msi_api.h
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@ -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);
/**