vfio: move eventfd support code for VFIO_PCI to a separate file
The virqfd functionality that is used by VFIO_PCI to implement interrupt
masking and unmasking via an eventfd, is generic enough and can be reused
by another driver. Move it to a separate file in order to allow the code
to be shared.
Signed-off-by: Antonios Motakis <a.motakis@virtualopensystems.com>
Signed-off-by: Baptiste Reynal <b.reynal@virtualopensystems.com>
Reviewed-by: Eric Auger <eric.auger@linaro.org>
Tested-by: Eric Auger <eric.auger@linaro.org>
Signed-off-by: Alex Williamson <alex.williamson@redhat.com>
diff --git a/include/linux/vfio.h b/include/linux/vfio.h
index 2d67b89..683b514 100644
--- a/include/linux/vfio.h
+++ b/include/linux/vfio.h
@@ -14,6 +14,8 @@
#include <linux/iommu.h>
#include <linux/mm.h>
+#include <linux/workqueue.h>
+#include <linux/poll.h>
#include <uapi/linux/vfio.h>
/**
@@ -123,4 +125,29 @@
return -ENOTTY;
}
#endif /* CONFIG_EEH */
+
+/*
+ * IRQfd - generic
+ */
+struct virqfd {
+ void *opaque;
+ struct eventfd_ctx *eventfd;
+ int (*handler)(void *, void *);
+ void (*thread)(void *, void *);
+ void *data;
+ struct work_struct inject;
+ wait_queue_t wait;
+ poll_table pt;
+ struct work_struct shutdown;
+ struct virqfd **pvirqfd;
+};
+
+extern int vfio_virqfd_init(void);
+extern void vfio_virqfd_exit(void);
+extern int vfio_virqfd_enable(void *opaque,
+ int (*handler)(void *, void *),
+ void (*thread)(void *, void *),
+ void *data, struct virqfd **pvirqfd, int fd);
+extern void vfio_virqfd_disable(struct virqfd **pvirqfd);
+
#endif /* VFIO_H */