1 files changed, 96 insertions, 0 deletions
diff --git a/src/lib/occlib/ipc_ping.c b/src/lib/occlib/ipc_ping.c
new file mode 100644
index 0000000..f295c99
--- /dev/null
+++ b/src/lib/occlib/ipc_ping.c
@@ -0,0 +1,96 @@
+/* IBM_PROLOG_BEGIN_TAG                                                   */
+/* This is an automatically generated prolog.                             */
+/*                                                                        */
+/* $Source: src/lib/occlib/ipc_ping.c $                                   */
+/*                                                                        */
+/* OpenPOWER OnChipController Project                                     */
+/*                                                                        */
+/* Contributors Listed Below - COPYRIGHT 2015                             */
+/* [+] International Business Machines Corp.                              */
+/*                                                                        */
+/*                                                                        */
+/* Licensed under the Apache License, Version 2.0 (the "License");        */
+/* you may not use this file except in compliance with the License.       */
+/* You may obtain a copy of the License at                                */
+/*                                                                        */
+/*     http://www.apache.org/licenses/LICENSE-2.0                         */
+/*                                                                        */
+/* Unless required by applicable law or agreed to in writing, software    */
+/* distributed under the License is distributed on an "AS IS" BASIS,      */
+/* WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or        */
+/* implied. See the License for the specific language governing           */
+/* permissions and limitations under the License.                         */
+/*                                                                        */
+/* IBM_PROLOG_END_TAG                                                     */
+#include "ipc_ping.h"
+
+#ifdef IPC_ENABLE_PING
+//server side ping message handler
+void ipc_ping_handler(ipc_msg_t* cmd, void* arg)
+{
+    //NOTE: this will run in a critical interrupt when sent to the 405
+    //ignore return codes
+    ipc_send_rsp(cmd, IPC_RC_SUCCESS);
+}
+
+//Note: This runs in a critical interrupt on the 405 but SSX functions
+//      can not be called from a critical interrupt.  Instead, it must be
+//      deferred to a non-critical handler.
+void ipc_ping_response(ipc_msg_t* rsp, void* arg)
+{
+    ipc_ping_cmd_t *ping_cmd = (ipc_ping_cmd_t*)rsp;
+
+    if(KERN_CONTEXT_CRITICAL_INTERRUPT())
+    {
+        //NOTE: this is a no-op on PPE
+        IPC_DEFER_TO_NONCRITICAL(rsp);
+    }
+    else
+    {
+        KERN_SEMAPHORE_POST(&ping_cmd->sem);
+        ipc_free_msg(&ping_cmd->msg);
+    }
+
+}
+
+
+//Command that can be run in a thread context to ping another target
+//The message is allocated on the stack
+int ipc_ping(ipc_ping_cmd_t* ping_cmd, uint32_t target_id)
+{
+    int rc;
+
+    do
+    {
+        //set the target (since this is a multi-target command)
+        rc = ipc_set_cmd_target(&ping_cmd->msg, target_id);
+        if(rc)
+        {
+            break;
+        }
+
+        //send the command
+        rc = ipc_send_cmd(&ping_cmd->msg);
+        if(rc)
+        {
+            break;
+        }
+
+        //assume that if we timed out then the target must have gone down.
+        rc = KERN_SEMAPHORE_PEND(&ping_cmd->sem, KERN_SECONDS(1));
+        if(rc)
+        {
+            if(rc == -KERN_SEMAPHORE_PEND_TIMED_OUT)
+            {
+                rc = IPC_RC_TIMEOUT;
+            }
+            break;
+        }
+
+        //response message was received.  Now return the ipc_rc
+        rc = ipc_get_rc(&ping_cmd->msg);
+        
+    }while(0);
+    return rc;
+}
+#endif /*IPC_ENABLE_PING*/