Commit 06bff9e3 authored by Thomas Gleixner's avatar Thomas Gleixner
Browse files

genirq/msi: Provide struct msi_map 



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: default avatarThomas Gleixner <tglx@linutronix.de>
Reviewed-by: default avatarKevin Tian <kevin.tian@intel.com>
Acked-by: default avatarMarc Zyngier <maz@kernel.org>
Link: https://lore.kernel.org/r/20221124232326.326410494@linutronix.de
parent 4d5a4ccc

include/linux/msi_api.h

+13 −0
Original line number Diff line number Diff line
@@ -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);



/**