1 files changed, 320 insertions, 0 deletions
diff --git a/cpu/ixp/npe/IxNpeMhReceive.c b/cpu/ixp/npe/IxNpeMhReceive.c
new file mode 100644
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--- /dev/null
+++ b/cpu/ixp/npe/IxNpeMhReceive.c
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+/**
+ * @file IxNpeMhReceive.c
+ *
+ * @author Intel Corporation
+ * @date 18 Jan 2002
+ *
+ * @brief This file contains the implementation of the private API for the
+ * Receive module.
+ *
+ * 
+ * @par
+ * IXP400 SW Release version 2.0
+ * 
+ * -- Copyright Notice --
+ * 
+ * @par
+ * Copyright 2001-2005, Intel Corporation.
+ * All rights reserved.
+ * 
+ * @par
+ * Redistribution and use in source and binary forms, with or without
+ * modification, are permitted provided that the following conditions
+ * are met:
+ * 1. Redistributions of source code must retain the above copyright
+ *    notice, this list of conditions and the following disclaimer.
+ * 2. Redistributions in binary form must reproduce the above copyright
+ *    notice, this list of conditions and the following disclaimer in the
+ *    documentation and/or other materials provided with the distribution.
+ * 3. Neither the name of the Intel Corporation nor the names of its contributors
+ *    may be used to endorse or promote products derived from this software
+ *    without specific prior written permission.
+ * 
+ * @par
+ * THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS ``AS IS''
+ * AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
+ * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
+ * ARE DISCLAIMED.  IN NO EVENT SHALL THE COPYRIGHT OWNER OR CONTRIBUTORS BE LIABLE
+ * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
+ * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
+ * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
+ * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
+ * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
+ * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
+ * SUCH DAMAGE.
+ * 
+ * @par
+ * -- End of Copyright Notice --
+*/
+
+/*
+ * Put the system defined include files required.
+ */
+
+
+/*
+ * Put the user defined include files required.
+ */
+#include "IxOsal.h"
+#include "IxNpeMhMacros_p.h"
+#include "IxNpeMhConfig_p.h"
+#include "IxNpeMhReceive_p.h"
+#include "IxNpeMhSolicitedCbMgr_p.h"
+#include "IxNpeMhUnsolicitedCbMgr_p.h"
+
+/*
+ * #defines and macros used in this file.
+ */
+
+/*
+ * Typedefs whose scope is limited to this file.
+ */
+
+/**
+ * @struct IxNpeMhReceiveStats
+ *
+ * @brief This structure is used to maintain statistics for the Receive
+ * module.
+ */
+
+typedef struct
+{
+    UINT32 isrs;        /**< receive ISR invocations */
+    UINT32 receives;    /**< receive messages invocations */
+    UINT32 messages;    /**< messages received */
+    UINT32 solicited;   /**< solicited messages received */
+    UINT32 unsolicited; /**< unsolicited messages received */
+    UINT32 callbacks;   /**< callbacks invoked */
+} IxNpeMhReceiveStats;
+
+/*
+ * Variable declarations global to this file only.  Externs are followed by
+ * static variables.
+ */
+
+PRIVATE IxNpeMhReceiveStats ixNpeMhReceiveStats[IX_NPEMH_NUM_NPES];
+
+/*
+ * Extern function prototypes.
+ */
+
+/*
+ * Static function prototypes.
+ */
+PRIVATE
+void ixNpeMhReceiveIsr (int npeId);
+
+PRIVATE
+void ixNpeMhReceiveIsr (int npeId)
+{
+    int lockKey;
+
+    IX_NPEMH_TRACE0 (IX_NPEMH_FN_ENTRY_EXIT, "Entering "
+                     "ixNpeMhReceiveIsr\n");
+
+    lockKey = ixOsalIrqLock ();
+
+    /* invoke the message receive routine to get messages from the NPE */
+    ixNpeMhReceiveMessagesReceive (npeId);
+
+    /* update statistical info */
+    ixNpeMhReceiveStats[npeId].isrs++;
+
+    ixOsalIrqUnlock (lockKey);
+
+    IX_NPEMH_TRACE0 (IX_NPEMH_FN_ENTRY_EXIT, "Exiting "
+                     "ixNpeMhReceiveIsr\n");
+}
+
+/*
+ * Function definition: ixNpeMhReceiveInitialize
+ */
+
+void ixNpeMhReceiveInitialize (void)
+{
+    IxNpeMhNpeId npeId = 0;
+
+    IX_NPEMH_TRACE0 (IX_NPEMH_FN_ENTRY_EXIT, "Entering "
+                     "ixNpeMhReceiveInitialize\n");
+
+    /* for each NPE ... */
+    for (npeId = 0; npeId < IX_NPEMH_NUM_NPES; npeId++)
+    {
+        /* register our internal ISR for the NPE to handle "outFIFO not */
+        /* empty" interrupts */
+        ixNpeMhConfigIsrRegister (npeId, ixNpeMhReceiveIsr);
+    }
+
+    IX_NPEMH_TRACE0 (IX_NPEMH_FN_ENTRY_EXIT, "Exiting "
+                     "ixNpeMhReceiveInitialize\n");
+}
+
+/*
+ * Function definition: ixNpeMhReceiveMessagesReceive
+ */
+
+IX_STATUS ixNpeMhReceiveMessagesReceive (
+    IxNpeMhNpeId npeId)
+{
+    IxNpeMhMessage message = { { 0, 0 } };
+    IxNpeMhMessageId messageId = 0;
+    IxNpeMhCallback callback = NULL;
+    IX_STATUS status;
+
+    IX_NPEMH_TRACE0 (IX_NPEMH_FN_ENTRY_EXIT, "Entering "
+                     "ixNpeMhReceiveMessagesReceive\n");
+
+    /* update statistical info */
+    ixNpeMhReceiveStats[npeId].receives++;
+
+    /* while the NPE has messages in its outFIFO */
+    while (!ixNpeMhConfigOutFifoIsEmpty (npeId))
+    {
+        /* read a message from the NPE's outFIFO */
+        status = ixNpeMhConfigOutFifoRead (npeId, &message);
+
+        if (IX_SUCCESS != status)
+        {
+            return status;
+        }
+        
+        /* get the ID of the message */
+        messageId = ixNpeMhConfigMessageIdGet (message);
+
+	    IX_NPEMH_TRACE2 (IX_NPEMH_DEBUG,
+			 "Received message from NPE %d with ID 0x%02X\n",
+			 npeId, messageId);
+
+        /* update statistical info */
+        ixNpeMhReceiveStats[npeId].messages++;
+
+        /* try to find a matching unsolicited callback for this message. */
+
+        /* we assume the message is unsolicited.  only if there is no */
+        /* unsolicited callback for this message type do we assume the */
+        /* message is solicited.  it is much faster to check for an */
+        /* unsolicited callback, so doing this check first should result */
+        /* in better performance. */
+
+        ixNpeMhUnsolicitedCbMgrCallbackRetrieve (
+            npeId, messageId, &callback);
+
+        if (callback != NULL)
+        {
+	    IX_NPEMH_TRACE0 (IX_NPEMH_DEBUG,
+			     "Found matching unsolicited callback\n");
+
+            /* update statistical info */
+            ixNpeMhReceiveStats[npeId].unsolicited++;
+        }
+
+        /* if no unsolicited callback was found try to find a matching */
+        /* solicited callback for this message */
+        if (callback == NULL)
+        {
+            ixNpeMhSolicitedCbMgrCallbackRetrieve (
+                npeId, messageId, &callback);
+
+            if (callback != NULL)
+            {
+		IX_NPEMH_TRACE0 (IX_NPEMH_DEBUG,
+				 "Found matching solicited callback\n");
+
+                /* update statistical info */
+                ixNpeMhReceiveStats[npeId].solicited++;
+            }
+        }
+
+        /* if a callback (either unsolicited or solicited) was found */
+        if (callback != NULL)
+        {
+            /* invoke the callback to pass the message back to the client */
+            callback (npeId, message);
+
+            /* update statistical info */
+            ixNpeMhReceiveStats[npeId].callbacks++;
+        }
+        else /* no callback (neither unsolicited nor solicited) was found */
+        {
+	    IX_NPEMH_TRACE2 (IX_NPEMH_WARNING,
+			     "No matching callback for NPE %d"
+			     " and ID 0x%02X, discarding message\n",
+			     npeId, messageId);
+
+            /* the message will be discarded.  this is normal behaviour */
+            /* if the client passes a NULL solicited callback when */
+            /* sending a message.  this indicates that the client is not */
+            /* interested in receiving the response.  alternatively a */
+            /* NULL callback here may signify an unsolicited message */
+            /* with no appropriate registered callback. */
+        }
+    }
+
+    IX_NPEMH_TRACE0 (IX_NPEMH_FN_ENTRY_EXIT, "Exiting "
+                     "ixNpeMhReceiveMessagesReceive\n");
+    
+    return IX_SUCCESS;
+}
+
+/*
+ * Function definition: ixNpeMhReceiveShow
+ */
+
+void ixNpeMhReceiveShow (
+    IxNpeMhNpeId npeId)
+{
+    /* show the ISR invocation counter */
+    IX_NPEMH_SHOW ("Receive ISR invocations",
+                   ixNpeMhReceiveStats[npeId].isrs);
+
+    /* show the receive message invocation counter */
+    IX_NPEMH_SHOW ("Receive messages invocations",
+                   ixNpeMhReceiveStats[npeId].receives);
+
+    /* show the message received counter */
+    IX_NPEMH_SHOW ("Messages received",
+                   ixNpeMhReceiveStats[npeId].messages);
+
+    /* show the solicited message counter */
+    IX_NPEMH_SHOW ("Solicited messages received",
+                   ixNpeMhReceiveStats[npeId].solicited);
+
+    /* show the unsolicited message counter */
+    IX_NPEMH_SHOW ("Unsolicited messages received",
+                   ixNpeMhReceiveStats[npeId].unsolicited);
+
+    /* show the callback invoked counter */
+    IX_NPEMH_SHOW ("Callbacks invoked",
+                   ixNpeMhReceiveStats[npeId].callbacks);
+
+    /* show the message discarded counter */
+    IX_NPEMH_SHOW ("Received messages discarded",
+                   (ixNpeMhReceiveStats[npeId].messages -
+                    ixNpeMhReceiveStats[npeId].callbacks));
+}
+
+/*
+ * Function definition: ixNpeMhReceiveShowReset
+ */
+
+void ixNpeMhReceiveShowReset (
+    IxNpeMhNpeId npeId)
+{
+    /* reset the ISR invocation counter */
+    ixNpeMhReceiveStats[npeId].isrs = 0;
+
+    /* reset the receive message invocation counter */
+    ixNpeMhReceiveStats[npeId].receives = 0;
+
+    /* reset the message received counter */
+    ixNpeMhReceiveStats[npeId].messages = 0;
+
+    /* reset the solicited message counter */
+    ixNpeMhReceiveStats[npeId].solicited = 0;
+
+    /* reset the unsolicited message counter */
+    ixNpeMhReceiveStats[npeId].unsolicited = 0;
+
+    /* reset the callback invoked counter */
+    ixNpeMhReceiveStats[npeId].callbacks = 0;
+}