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Subject[RFC v6 06/16] VFIO: Introduce vfio_device_external_ops
Date
New bus callbacks are introduced. They correspond to external
functions. To avoid messing up the main vfio_device_ops
struct, a new vfio_device_external_ops struct is introduced.

Signed-off-by: Eric Auger <eric.auger@linaro.org>

---

v6: creation
---
include/linux/vfio.h | 18 ++++++++++++++++++
1 file changed, 18 insertions(+)

diff --git a/include/linux/vfio.h b/include/linux/vfio.h
index b18c38f..b0ec474 100644
--- a/include/linux/vfio.h
+++ b/include/linux/vfio.h
@@ -19,6 +19,23 @@
#include <uapi/linux/vfio.h>

/**
+ * struct vfio_device_external_ops - VFIO bus driver device callbacks
+ * used as external API
+ * @mask: mask any IRQ defined by triplet
+ * @is_active: returns whether any IRQ defined by triplet is active
+ * @set_automasked: sets the automasked flag of triplet's IRQ
+ */
+struct vfio_device_external_ops {
+ int (*mask)(void *device_data, unsigned index, unsigned start,
+ unsigned count);
+ int (*is_active)(void *device_data, unsigned index, unsigned start,
+ unsigned count);
+ int (*set_automasked)(void *device_data, unsigned index,
+ unsigned start, unsigned count,
+ bool automasked);
+};
+
+/**
* struct vfio_device_ops - VFIO bus driver device callbacks
*
* @open: Called when userspace creates new file descriptor for device
@@ -42,6 +59,7 @@ struct vfio_device_ops {
unsigned long arg);
int (*mmap)(void *device_data, struct vm_area_struct *vma);
void (*request)(void *device_data, unsigned int count);
+ struct vfio_device_external_ops *external_ops;
};

extern int vfio_add_group_dev(struct device *dev,
--
1.9.1


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