This patch introduces mdev_set_dma_ops() which allows parent to set
per device DMA ops. This help for the kernel driver to setup a correct
DMA mappings.
Signed-off-by: Jason Wang <jasowang@xxxxxxxxxx>
---
drivers/vfio/mdev/mdev_core.c | 7 +++++++
include/linux/mdev.h | 2 ++
2 files changed, 9 insertions(+)
diff --git a/drivers/vfio/mdev/mdev_core.c b/drivers/vfio/mdev/mdev_core.c
index b558d4cfd082..eb28552082d7 100644
--- a/drivers/vfio/mdev/mdev_core.c
+++ b/drivers/vfio/mdev/mdev_core.c
@@ -13,6 +13,7 @@
#include <linux/uuid.h>
#include <linux/sysfs.h>
#include <linux/mdev.h>
+#include <linux/dma-mapping.h>
#include "mdev_private.h"
@@ -27,6 +28,12 @@ static struct class_compat *mdev_bus_compat_class;
static LIST_HEAD(mdev_list);
static DEFINE_MUTEX(mdev_list_lock);
+void mdev_set_dma_ops(struct mdev_device *mdev, struct dma_map_ops *ops)
+{
+ set_dma_ops(&mdev->dev, ops);
+}
+EXPORT_SYMBOL(mdev_set_dma_ops);
+
struct device *mdev_parent_dev(struct mdev_device *mdev)
{
return mdev->parent->dev;
diff --git a/include/linux/mdev.h b/include/linux/mdev.h
index 0ce30ca78db0..7195f40bf8bf 100644
--- a/include/linux/mdev.h
+++ b/include/linux/mdev.h
@@ -145,4 +145,6 @@ struct device *mdev_parent_dev(struct mdev_device *mdev);
struct device *mdev_dev(struct mdev_device *mdev);
struct mdev_device *mdev_from_dev(struct device *dev);
+void mdev_set_dma_ops(struct mdev_device *mdev, struct dma_map_ops *ops);
+
#endif /* MDEV_H */
--
2.19.1
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