[dpdk-dev] [PATCH 14/15] net/virtio: add vDPA op to get notification area
Maxime Coquelin
maxime.coquelin at redhat.com
Thu Aug 29 09:59:59 CEST 2019
This patch implements the vDPA .get_notify_area()
callback.
Signed-off-by: Maxime Coquelin <maxime.coquelin at redhat.com>
---
drivers/net/virtio/virtio_vdpa.c | 33 ++++++++++++++++++++++++++++++++
1 file changed, 33 insertions(+)
diff --git a/drivers/net/virtio/virtio_vdpa.c b/drivers/net/virtio/virtio_vdpa.c
index e0b2f99ba..e681f527a 100644
--- a/drivers/net/virtio/virtio_vdpa.c
+++ b/drivers/net/virtio/virtio_vdpa.c
@@ -707,6 +707,38 @@ virtio_vdpa_get_vfio_device_fd(int vid)
return list->dev->vfio_dev_fd;
}
+static int
+virtio_vdpa_get_notify_area(int vid, int qid, uint64_t *offset, uint64_t *size)
+{
+ int did;
+ struct internal_list *list;
+ struct virtio_vdpa_device *dev;
+ struct vfio_region_info reg = { .argsz = sizeof(reg) };
+ int ret;
+
+ did = rte_vhost_get_vdpa_device_id(vid);
+ list = find_internal_resource_by_did(did);
+ if (list == NULL) {
+ DRV_LOG(ERR, "Invalid device id: %d", did);
+ return -1;
+ }
+
+ dev = list->dev;
+
+ reg.index = dev->hw.notify_region;
+ ret = ioctl(dev->vfio_dev_fd, VFIO_DEVICE_GET_REGION_INFO, ®);
+ if (ret) {
+ DRV_LOG(ERR, "Get not get device region info: %s",
+ strerror(errno));
+ return -1;
+ }
+
+ *offset = dev->vqs[qid].notify_addr - dev->hw.notify_base + reg.offset;
+ *size = 0x1000;
+
+ return 0;
+}
+
static struct rte_vdpa_dev_ops virtio_vdpa_ops = {
.get_queue_num = virtio_vdpa_get_queue_num,
.get_features = virtio_vdpa_get_features,
@@ -716,6 +748,7 @@ static struct rte_vdpa_dev_ops virtio_vdpa_ops = {
.set_features = virtio_vdpa_set_features,
.get_vfio_group_fd = virtio_vdpa_get_vfio_group_fd,
.get_vfio_device_fd = virtio_vdpa_get_vfio_device_fd,
+ .get_notify_area = virtio_vdpa_get_notify_area,
};
static inline int
--
2.21.0
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