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vfio/mdev: consolidate all the available_instance sysfs into the core code

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Every driver just print a number, simply add a method to the mdev_driver
to return it and provide a standard sysfs show function.

Signed-off-by: Christoph Hellwig <hch@lst.de>
Reviewed-by: Jason Gunthorpe <jgg@nvidia.com>
Reviewed-by: Kevin Tian <kevin.tian@intel.com>
Reviewed-by: Kirti Wankhede <kwankhede@nvidia.com>
Reviewed-by: Eric Farman <farman@linux.ibm.com>
Link: https://lore.kernel.org/r/20220923092652.100656-13-hch@lst.de
Signed-off-by: Alex Williamson <alex.williamson@redhat.com>
This commit is contained in:
Christoph Hellwig 2022-09-23 11:26:50 +02:00 • committed by Alex Williamson
parent 0bc79069cc
commit f2fbc72e6d
11 changed files with 55 additions and 102 deletions
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2
include/linux/mdev.h
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@ -72,6 +72,7 @@ struct mdev_type_attribute {
* @device_api: string to return for the device_api sysfs
* @probe: called when new device created
* @remove: called when device removed
* @get_available: Return the max number of instances that can be created
* @types_attrs: attributes to the type kobjects.
* @driver: device driver structure
**/
@ -79,6 +80,7 @@ struct mdev_driver {
const char *device_api;
int (*probe)(struct mdev_device *dev);
void (*remove)(struct mdev_device *dev);
unsigned int (*get_available)(struct mdev_type *mtype);
const struct attribute * const *types_attrs;
struct device_driver driver;
};