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device: Add device:: Msi_data pointer and struct msi_device_data

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Create struct msi_device_data and add a pointer of that type to struct
dev_msi_info, which is part of struct device. Provide an allocator function
which can be invoked from the MSI interrupt allocation code pathes.

Add a properties field to the data structure as a first member so the
allocation size is not zero bytes. The field will be uses later on.

Signed-off-by: Thomas Gleixner <tglx@linutronix.de>
Tested-by: Michael Kelley <mikelley@microsoft.com>
Tested-by: Nishanth Menon <nm@ti.com>
Reviewed-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
Reviewed-by: Jason Gunthorpe <jgg@nvidia.com>
Link: https://lore.kernel.org/r/20211210221813.676660809@linutronix.de
This commit is contained in:
Thomas Gleixner
2021-12-10 23:18:55 +01:00
parent 34fff62827
commit 013bd8e543
3 changed files with 55 additions and 0 deletions
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5
include/linux/device.h
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@@ -45,6 +45,7 @@ struct iommu_ops;
struct iommu_group;
struct dev_pin_info;
struct dev_iommu;
struct msi_device_data;
/**
* struct subsys_interface - interfaces to device functions
@@ -374,11 +375,15 @@ struct dev_links_info {
/**
* struct dev_msi_info - Device data related to MSI
* @domain: The MSI interrupt domain associated to the device
* @data: Pointer to MSI device data
*/
struct dev_msi_info {
#ifdef CONFIG_GENERIC_MSI_IRQ_DOMAIN
struct irq_domain *domain;
#endif
#ifdef CONFIG_GENERIC_MSI_IRQ
struct msi_device_data *data;
#endif
};
/**