This patch adds a new flags for device drivers. This flag instructs kernel that the device driver does it own management of IOMMU assisted IO address space translations, so no default dma-mapping structures should be initialized.
Signed-off-by: Marek Szyprowski m.szyprowski@samsung.com --- include/linux/device.h | 2 ++ 1 file changed, 2 insertions(+)
diff --git a/include/linux/device.h b/include/linux/device.h index 5f4ff02..2e62371 100644 --- a/include/linux/device.h +++ b/include/linux/device.h @@ -253,6 +253,8 @@ struct device_driver {
/* disables bind/unbind via sysfs */ #define DRIVER_SUPPRESS_BIND_ATTRS (1 << 0) +/* driver uses own methods to manage IO address space */ +#define DRIVER_HAS_OWN_IOMMU_MANAGER (1 << 1)
extern int __must_check driver_register(struct device_driver *drv); extern void driver_unregister(struct device_driver *drv);