vmxnet3: support higher link speeds from vmxnet3 v9

Until now, vmxnet3 was default reporting 10Gbps as link speed.
Vmxnet3 v9 adds support for user to configure higher link speeds.
User can configure the link speed via VMs advanced parameters options
in VCenter. This speed is reported in gbps by hypervisor.

This patch adds support for vmxnet3 to report higher link speeds and
converts it to mbps as expected by Linux stack.

Signed-off-by: Ronak Doshi <ronak.doshi@broadcom.com>
Acked-by: Guolin Yang <guolin.yang@broadcom.com>
Reviewed-by: Simon Horman <horms@kernel.org>
Link: https://patch.msgid.link/20241004174303.5370-1-ronak.doshi@broadcom.com
Signed-off-by: Jakub Kicinski <kuba@kernel.org>

diff --git a/drivers/net/vmxnet3/vmxnet3_drv.c b/drivers/net/vmxnet3/vmxnet3_drv.c
index b70654c7ad34ea773a838d40bcb7e0131166981e..6793fa09f9d1ad92880dc739a86ff106e4741e1f 100644 (file)
--- a/drivers/net/vmxnet3/vmxnet3_drv.c
+++ b/drivers/net/vmxnet3/vmxnet3_drv.c
@@ -201,6 +201,14 @@ vmxnet3_check_link(struct vmxnet3_adapter *adapter, bool affectTxQueue)
 
        adapter->link_speed = ret >> 16;
        if (ret & 1) { /* Link is up. */
+               /*
+                * From vmxnet3 v9, the hypervisor reports the speed in Gbps.
+                * Convert the speed to Mbps before rporting it to the kernel.
+                * Max link speed supported is 10000G.
+                */
+               if (VMXNET3_VERSION_GE_9(adapter) &&
+                   adapter->link_speed < 10000)
+                       adapter->link_speed = adapter->link_speed * 1000;
                netdev_info(adapter->netdev, "NIC Link is Up %d Mbps\n",
                            adapter->link_speed);
                netif_carrier_on(adapter->netdev);