From: Haiyang Zhang <haiyangz@microsoft.com>
Date: Thu, 4 Aug 2016 17:42:15 +0000 (-0700)
Subject: hv_netvsc: Add handler for physical link speed change
X-Git-Url: https://git.stricted.de/?a=commitdiff_plain;h=7f5d5af0b2f859f09b3dcb16a00b800fa48d9288;p=GitHub%2Fmoto-9609%2Fandroid_kernel_motorola_exynos9610.git

hv_netvsc: Add handler for physical link speed change

On Hyper-V host 2016 and later, VMs gets an event message of the physical
link speed when vSwitch is changed. This patch handles this message, so
the updated link speed can be reported by ethtool.

Signed-off-by: Haiyang Zhang <haiyangz@microsoft.com>
Reviewed-by: K. Y. Srinivasan <kys@microsoft.com>
Signed-off-by: David S. Miller <davem@davemloft.net>
---

diff --git a/drivers/net/hyperv/hyperv_net.h b/drivers/net/hyperv/hyperv_net.h
index 467fb8b4d083..c1403fda874c 100644
--- a/drivers/net/hyperv/hyperv_net.h
+++ b/drivers/net/hyperv/hyperv_net.h
@@ -490,6 +490,7 @@ struct nvsp_2_vsc_capability {
 			u64 sriov:1;
 			u64 ieee8021q:1;
 			u64 correlation_id:1;
+			u64 teaming:1;
 		};
 	};
 } __packed;
diff --git a/drivers/net/hyperv/netvsc.c b/drivers/net/hyperv/netvsc.c
index 20e09174ff62..36a7994f2811 100644
--- a/drivers/net/hyperv/netvsc.c
+++ b/drivers/net/hyperv/netvsc.c
@@ -472,9 +472,13 @@ static int negotiate_nvsp_ver(struct hv_device *device,
 	init_packet->msg.v2_msg.send_ndis_config.mtu = ndev->mtu + ETH_HLEN;
 	init_packet->msg.v2_msg.send_ndis_config.capability.ieee8021q = 1;
 
-	if (nvsp_ver >= NVSP_PROTOCOL_VERSION_5)
+	if (nvsp_ver >= NVSP_PROTOCOL_VERSION_5) {
 		init_packet->msg.v2_msg.send_ndis_config.capability.sriov = 1;
 
+		/* Teaming bit is needed to receive link speed updates */
+		init_packet->msg.v2_msg.send_ndis_config.capability.teaming = 1;
+	}
+
 	ret = vmbus_sendpacket(device->channel, init_packet,
 				sizeof(struct nvsp_message),
 				(unsigned long)init_packet,
diff --git a/drivers/net/hyperv/netvsc_drv.c b/drivers/net/hyperv/netvsc_drv.c
index 3e5356b6f825..82c8f6d47283 100644
--- a/drivers/net/hyperv/netvsc_drv.c
+++ b/drivers/net/hyperv/netvsc_drv.c
@@ -579,19 +579,32 @@ void netvsc_linkstatus_callback(struct hv_device *device_obj,
 	struct netvsc_reconfig *event;
 	unsigned long flags;
 
-	/* Handle link change statuses only */
+	net = hv_get_drvdata(device_obj);
+
+	if (!net)
+		return;
+
+	ndev_ctx = netdev_priv(net);
+
+	/* Update the physical link speed when changing to another vSwitch */
+	if (indicate->status == RNDIS_STATUS_LINK_SPEED_CHANGE) {
+		u32 speed;
+
+		speed = *(u32 *)((void *)indicate + indicate->
+				 status_buf_offset) / 10000;
+		ndev_ctx->speed = speed;
+		return;
+	}
+
+	/* Handle these link change statuses below */
 	if (indicate->status != RNDIS_STATUS_NETWORK_CHANGE &&
 	    indicate->status != RNDIS_STATUS_MEDIA_CONNECT &&
 	    indicate->status != RNDIS_STATUS_MEDIA_DISCONNECT)
 		return;
 
-	net = hv_get_drvdata(device_obj);
-
-	if (!net || net->reg_state != NETREG_REGISTERED)
+	if (net->reg_state != NETREG_REGISTERED)
 		return;
 
-	ndev_ctx = netdev_priv(net);
-
 	event = kzalloc(sizeof(*event), GFP_ATOMIC);
 	if (!event)
 		return;