Commit 3ab45516 authored by Fenghua Yu's avatar Fenghua Yu Committed by Vinod Koul
Browse files

dmaengine: idxd: Binding and unbinding IDXD device and driver 



Add idxd_bind() and idxd_unbind() helpers to bind and unbind the IDXD
device and driver.

These helpers will be called during Function Level Reset (FLR) processing.

Signed-off-by: default avatarFenghua Yu <fenghua.yu@intel.com>
Reviewed-by: default avatarDave Jiang <dave.jiang@intel.com>
Link: https://lore.kernel.org/r/20241122233028.2762809-3-fenghua.yu@intel.com


Signed-off-by: default avatarVinod Koul <vkoul@kernel.org>
parent 087e89b6

drivers/dma/idxd/init.c

+33 −0
Original line number Diff line number Diff line
@@ -725,6 +725,39 @@ static void idxd_cleanup(struct idxd_device *idxd) 
		idxd_disable_sva(idxd->pdev);

}



/*

 * Attach IDXD device to IDXD driver.

 */

static int idxd_bind(struct device_driver *drv, const char *buf)

{

	const struct bus_type *bus = drv->bus;

	struct device *dev;

	int err = -ENODEV;



	dev = bus_find_device_by_name(bus, NULL, buf);

	if (dev)

		err = device_driver_attach(drv, dev);



	put_device(dev);



	return err;

}



/*

 * Detach IDXD device from driver.

 */

static void idxd_unbind(struct device_driver *drv, const char *buf)

{

	const struct bus_type *bus = drv->bus;

	struct device *dev;



	dev = bus_find_device_by_name(bus, NULL, buf);

	if (dev && dev->driver == drv)

		device_release_driver(dev);



	put_device(dev);

}



/*

 * Probe idxd PCI device.

 * If idxd is not given, need to allocate idxd and set up its data.