enic: Use a lighter reset operation for enic devices

The port profile information for a dynamic enic device is set by the upper
layers, that are oblivious to the device reset operation. We do not want a
reset operation erase the network state of a dynamic enic device as there
is no way to set up the port profile information again. Hence a lighter
reset operation called hang reset is used. Hang reset, unlike soft reset
does not reset the network state and resets the host side state only.

Signed-off-by: Scott Feldman <scofeldm@cisco.com>
Signed-off-by: Vasanthy Kolluri <vkolluri@cisco.com>
Signed-off-by: Roopa Prabhu <roprabhu@cisco.com>
Signed-off-by: David S. Miller <davem@davemloft.net>

1 files changed, 7 insertions, 0 deletions

diff --git a/drivers/net/enic/vnic_devcmd.h b/drivers/net/enic/vnic_devcmd.h
index c5ff4ff2ed26..1c4fb35671fa 100644
--- a/drivers/net/enic/vnic_devcmd.h
+++ b/drivers/net/enic/vnic_devcmd.h
@@ -212,6 +212,13 @@ enum vnic_devcmd_cmd {
          */
         CMD_IAR                 = _CMDCNW(_CMD_DIR_WRITE, _CMD_VTYPE_ALL, 38),
 
+        /* initiate hangreset, like softreset after hang detected */
+        CMD_HANG_RESET          = _CMDC(_CMD_DIR_NONE, _CMD_VTYPE_ALL, 39),
+
+        /* hangreset status:
+         *    out: a0=0 reset complete, a0=1 reset in progress */
+        CMD_HANG_RESET_STATUS   = _CMDC(_CMD_DIR_READ, _CMD_VTYPE_ALL, 40),
+
         /*
          * Set hw ingress packet vlan rewrite mode:
          * in:  (u32)a0=new vlan rewrite mode