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: Fenghua Yu <fenghua.yu@xxxxxxxxx>
---
drivers/dma/idxd/init.c | 33 +++++++++++++++++++++++++++++++++
1 file changed, 33 insertions(+)
diff --git a/drivers/dma/idxd/init.c b/drivers/dma/idxd/init.c
index 068103b40223..a6d8097b2dcf 100644
--- a/drivers/dma/idxd/init.c
+++ b/drivers/dma/idxd/init.c
@@ -716,6 +716,39 @@ 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.
--
2.37.1
