Add support to probe if TA is available

When connecting to Trusty via TIPC, linux kernel wants to know
if the connection failure is caused by port_not_found issues
such as the requested TA is not available.

Bug 1896070
Jira APTS-731

Change-Id: I7fe9b895b79ba5fa82b15d2bfd90b1297fd7d017
Signed-off-by: Tao Ye <tye@nvidia.com>
Reviewed-on: https://git-master.nvidia.com/r/1523288
Reviewed-by: Varun Wadekar <vwadekar@nvidia.com>
Reviewed-by: svccoveritychecker <svccoveritychecker@nvidia.com>
Reviewed-by: svc-mobile-coverity <svc-mobile-coverity@nvidia.com>
GVS: Gerrit_Virtual_Submit
Reviewed-by: Stephen Warren <swarren@nvidia.com>
Reviewed-by: Mitch Luban <mluban@nvidia.com>
Tested-by: Mrutyunjay Sawant <msawant@nvidia.com>

1 files changed, 9 insertions, 0 deletions

diff --git a/include/linux/trusty/trusty_ipc.h b/include/linux/trusty/trusty_ipc.h
index beabc3f3e..da785e98d 100644
--- a/include/linux/trusty/trusty_ipc.h
+++ b/include/linux/trusty/trusty_ipc.h
@@ -1,5 +1,6 @@
 /*
  * Copyright (C) 2015 Google, Inc.
+ * Copyright (c) 2016-2017, NVIDIA CORPORATION. All rights reserved.
  *
  * This software is licensed under the terms of the GNU General Public
  * License version 2, as published by the Free Software Foundation, and
@@ -14,6 +15,13 @@
 #ifndef __LINUX_TRUSTY_TRUSTY_IPC_H
 #define __LINUX_TRUSTY_TRUSTY_IPC_H
 
+/*
+ * Errnos below must be in sync with the corresponding errnos
+ * defined in 3rdparty/trusty/external/lk/include/err.h
+ */
+#define NO_ERROR                (0)
+#define ERR_NOT_FOUND           (-2)
+
 struct tipc_chan;
 
 struct tipc_msg_buf {
@@ -29,6 +37,7 @@ enum tipc_chan_event {
         TIPC_CHANNEL_CONNECTED = 1,
         TIPC_CHANNEL_DISCONNECTED,
         TIPC_CHANNEL_SHUTDOWN,
+        TIPC_CHANNEL_NOT_FOUND,
 };
 
 struct tipc_chan_ops {