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authorSjur Brændeland <sjur.brandeland@stericsson.com>2013-03-20 07:21:24 +0400
committerRusty Russell <rusty@rustcorp.com.au>2013-03-20 07:36:05 +0400
commit3beee86a4b9374e38dba36b44e81f1423a0d6b54 (patch)
tree5993020791a65623200b45393ccd63b342d5a933 /include/linux/virtio.h
parent1515c5ce26ae45a8ecea4e68a484562ca4356442 (diff)
downloadlinux-3beee86a4b9374e38dba36b44e81f1423a0d6b54.tar.xz
virtio: Introduce vringh wrappers in virtio_config
Add wrappers for the host vrings to support loose coupling between the virtio device and driver. A new struct vringh_config_ops with the functions find_vrhs() and del_vrhs() is added to the virtio_device struct. This enables virtio drivers to manage virtio host rings without detailed knowledge of how the vrings are created and deleted. The function vringh_notify() is added so vringh clients can notify the other side that buffers are added to the used-ring. Cc: Ohad Ben-Cohen <ohad@wizery.com> Signed-off-by: Sjur Brændeland <sjur.brandeland@stericsson.com> Signed-off-by: Rusty Russell <rusty@rustcorp.com.au> (constified vringh_config)
Diffstat (limited to 'include/linux/virtio.h')
-rw-r--r--include/linux/virtio.h3
1 files changed, 3 insertions, 0 deletions
diff --git a/include/linux/virtio.h b/include/linux/virtio.h
index ff6714e6d0f5..5d5b3abc283d 100644
--- a/include/linux/virtio.h
+++ b/include/linux/virtio.h
@@ -8,6 +8,7 @@
#include <linux/device.h>
#include <linux/mod_devicetable.h>
#include <linux/gfp.h>
+#include <linux/vringh.h>
/**
* virtqueue - a queue to register buffers for sending or receiving.
@@ -70,6 +71,7 @@ static inline unsigned int virtqueue_get_queue_index(struct virtqueue *vq)
* @dev: underlying device.
* @id: the device type identification (used to match it with a driver).
* @config: the configuration ops for this device.
+ * @vringh_config: configuration ops for host vrings.
* @vqs: the list of virtqueues for this device.
* @features: the features supported by both driver and device.
* @priv: private pointer for the driver's use.
@@ -79,6 +81,7 @@ struct virtio_device {
struct device dev;
struct virtio_device_id id;
const struct virtio_config_ops *config;
+ const struct vringh_config_ops *vringh_config;
struct list_head vqs;
/* Note that this is a Linux set_bit-style bitmap. */
unsigned long features[1];