[patch v4 2/6] net/netvsc: introduce get_vmbus_device to get the vmbus device

[longli@linuxonhyperv.com]

From: Long Li <longli@microsoft.com>

Introduce a function get the vmbus device from hn_data. For secondary
process, the vmbus device is in eth_dev's private region.

Signed-off-by: Long Li <longli@microsoft.com>
---
 drivers/net/netvsc/hn_nvs.c | 15 +++++++++++++++
 drivers/net/netvsc/hn_nvs.h |  2 ++
 2 files changed, 17 insertions(+)

diff --git a/drivers/net/netvsc/hn_nvs.c b/drivers/net/netvsc/hn_nvs.c
index 7db82af9f3..fd20e3d06d 100644
--- a/drivers/net/netvsc/hn_nvs.c
+++ b/drivers/net/netvsc/hn_nvs.c
@@ -44,6 +44,21 @@ static const uint32_t hn_nvs_version[] = {
 	NVS_VERSION_1
 };
 
+struct rte_vmbus_device *get_vmbus_device(struct hn_data *hv)
+{
+	struct rte_vmbus_device *vmbus = hv->vmbus;
+
+	/* For secondary process, vmbus is in the eth_dev private */
+	if (rte_eal_process_type() == RTE_PROC_SECONDARY) {
+		struct rte_eth_dev *dev = &rte_eth_devices[hv->port_id];
+		struct hn_nvs_process_priv *process_priv = dev->process_private;
+
+		vmbus = process_priv->vmbus_dev;
+	}
+
+	return vmbus;
+}
+
 static int hn_nvs_req_send(struct hn_data *hv,
 			   void *req, uint32_t reqlen)
 {
diff --git a/drivers/net/netvsc/hn_nvs.h b/drivers/net/netvsc/hn_nvs.h
index 3950749359..0d8fe27b65 100644
--- a/drivers/net/netvsc/hn_nvs.h
+++ b/drivers/net/netvsc/hn_nvs.h
@@ -221,6 +221,8 @@ void	hn_nvs_handle_vfassoc(struct rte_eth_dev *dev,
 			      const struct vmbus_chanpkt_hdr *hdr,
 			      const void *data);
 
+struct rte_vmbus_device *get_vmbus_device(struct hn_data *hv);
+
 static inline int
 hn_nvs_send(struct vmbus_channel *chan, uint16_t flags,
 	    void *nvs_msg, int nvs_msglen, uintptr_t sndc,
-- 
2.34.1