diff options
| author | Fenghua Yu <fenghua.yu@intel.com> | 2024-11-22 15:30:25 -0800 |
|---|---|---|
| committer | Vinod Koul <vkoul@kernel.org> | 2024-12-24 16:08:04 +0530 |
| commit | 3ab45516772b813315324dc63a900703144e80c4 (patch) | |
| tree | 39205975a274318524983d49bbe052f92e7194d8 /drivers/dma | |
| parent | 087e89b69b5fe5529a8809a06b4b4680e54f87e2 (diff) | |
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: Fenghua Yu <fenghua.yu@intel.com>
Reviewed-by: Dave Jiang <dave.jiang@intel.com>
Link: https://lore.kernel.org/r/20241122233028.2762809-3-fenghua.yu@intel.com
Signed-off-by: Vinod Koul <vkoul@kernel.org>
Diffstat (limited to 'drivers/dma')
| -rw-r--r-- | drivers/dma/idxd/init.c | 33 |
1 files changed, 33 insertions, 0 deletions
diff --git a/drivers/dma/idxd/init.c b/drivers/dma/idxd/init.c index 02c285499c5a..eb64a38444c1 100644 --- a/drivers/dma/idxd/init.c +++ b/drivers/dma/idxd/init.c @@ -726,6 +726,39 @@ static void idxd_cleanup(struct idxd_device *idxd) } /* + * 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. * |