ixethdbnpeadaptor.c

有关ARM开发板上的IXP400网络驱动程序的源码以。

/**
 * @file IxEthDBDBNPEAdaptor.c
 *
 * @brief Routines that read and write learning/search trees in NPE-specific format
 * 
 * @par
 * IXP400 SW Release version 2.1
 * 
 * -- Copyright Notice --
 * 
 * @par
 * Copyright (c) 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 --
 */

#include "IxEthDB_p.h"
#include "IxEthDBLog_p.h"

/* forward prototype declarations */
IX_ETH_DB_PUBLIC void ixEthDBELTShow(IxEthDBPortId portID);
IX_ETH_DB_PUBLIC void ixEthDBShowNpeMsgHistory(void);

/* data */
UINT8* ixEthDBNPEUpdateArea[IX_ETH_DB_NUMBER_OF_PORTS];
UINT32 dumpEltSize;

/* private data */
IX_ETH_DB_PRIVATE IxEthDBNoteWriteFn ixEthDBNPENodeWrite[IX_ETH_DB_MAX_RECORD_TYPE_INDEX + 1];

#define IX_ETH_DB_MAX_DELTA_ZONES (6) /* at most 6 EP Delta zones, according to NPE FS */
IX_ETH_DB_PRIVATE UINT32 ixEthDBEPDeltaOffset[IX_ETH_DB_MAX_RECORD_TYPE_INDEX + 1][IX_ETH_DB_MAX_DELTA_ZONES]; 
IX_ETH_DB_PRIVATE UINT32 ixEthDBEPDelta[IX_ETH_DB_MAX_RECORD_TYPE_INDEX + 1][IX_ETH_DB_MAX_DELTA_ZONES];

/**
 * @brief allocates non-cached or contiguous NPE tree update areas for all the ports
 *
 * This function is called only once at initialization time from
 * @ref ixEthDBInit().
 *
 * @warning do not call manually
 *
 * @see ixEthDBInit()
 *
 * @internal
 */
IX_ETH_DB_PUBLIC
void ixEthDBNPEUpdateAreasInit(void)
{
    UINT32 portIndex;
    PortUpdateMethod *update;

    for (portIndex = 0 ; portIndex < IX_ETH_DB_NUMBER_OF_PORTS ; portIndex++)
    {
        update = &ixEthDBPortInfo[portIndex].updateMethod;

        if (ixEthDBPortDefinitions[portIndex].type == IX_ETH_NPE)
        {
            update->npeUpdateZone   = IX_OSAL_CACHE_DMA_MALLOC(FULL_ELT_BYTE_SIZE);

            if (update->npeUpdateZone == NULL)
            {
                ERROR_LOG("Fatal error: IX_ACC_DRV_DMA_MALLOC() returned NULL, no NPE update zones available\n");
            }
            else
            {
                memset(update->npeUpdateZone, 0, FULL_ELT_BYTE_SIZE);
            }

            update->npeGwUpdateZone = IX_OSAL_CACHE_DMA_MALLOC(FULL_GW_BYTE_SIZE);

            if (update->npeGwUpdateZone == NULL)
            {
                ERROR_LOG("Fatal error: IX_ACC_DRV_DMA_MALLOC() returned NULL, no gateway update zones available\n");
            }
            else
            {
                memset(update->npeGwUpdateZone, 0, FULL_GW_BYTE_SIZE);
	    }

	    update->npeBssidUpdateZone = IX_OSAL_CACHE_DMA_MALLOC(FULL_BSSID_BYTE_SIZE);

	    if (update->npeBssidUpdateZone == NULL)
            {
                ERROR_LOG("Fatal error: IX_ACC_DRV_DMA_MALLOC() returned NULL, no bssid update zones available\n");
            }
            else
            {
	  	memset(update->npeBssidUpdateZone, 0, FULL_BSSID_BYTE_SIZE);
	    }

            update->vlanUpdateZone  = IX_OSAL_CACHE_DMA_MALLOC(FULL_VLAN_BYTE_SIZE);

            if (update->vlanUpdateZone == NULL)
            {
                ERROR_LOG("Fatal error: IX_ACC_DRV_DMA_MALLOC() returned NULL, no vlan update zones available\n");
            }
            else
            {
                memset(update->vlanUpdateZone, 0, FULL_VLAN_BYTE_SIZE);
            }
        }
        else
        {
            /* unused */
            update->npeUpdateZone   = NULL;
            update->npeGwUpdateZone = NULL;
	    update->npeBssidUpdateZone = NULL;
            update->vlanUpdateZone  = NULL;
        }
    }
}

/**
 * @brief deallocates the NPE update areas for all the ports
 *
 * This function is called at component de-initialization time
 * by @ref ixEthDBUnload().
 *
 * @warning do not call manually
 *
 * @internal
 */
IX_ETH_DB_PUBLIC
void ixEthDBNPEUpdateAreasUnload(void)
{
    UINT32 portIndex;
    PortUpdateMethod *update;

    for (portIndex = 0 ; portIndex < IX_ETH_DB_NUMBER_OF_PORTS ; portIndex++)
    {
	 update = &ixEthDBPortInfo[portIndex].updateMethod;

        if (ixEthDBPortDefinitions[portIndex].type == IX_ETH_NPE)
        {
	    if (update->npeUpdateZone != NULL)
	    {
               IX_OSAL_CACHE_DMA_FREE(update->npeUpdateZone);
	    }
	    if (update->npeGwUpdateZone != NULL)
	    {
               IX_OSAL_CACHE_DMA_FREE(update->npeGwUpdateZone);
	    }
	    if (update->npeBssidUpdateZone != NULL)
	    {
	       IX_OSAL_CACHE_DMA_FREE(update->npeBssidUpdateZone);
	    }
	    if (update->vlanUpdateZone != NULL)
	    {
               IX_OSAL_CACHE_DMA_FREE(update->vlanUpdateZone);
	    }
        }
    }
}

/**
 * @brief general-purpose NPE callback function
 *
 * @param npeID NPE ID
 * @param msg NPE message
 *
 * This function will unblock the caller by unlocking
 * the npeAckLock mutex defined for each NPE port
 *
 * @internal
 */
IX_ETH_DB_PUBLIC
void ixEthDBNpeMsgAck(IxNpeMhNpeId npeID, IxNpeMhMessage msg)
{
    IxEthDBPortId portID = IX_ETHNPE_NODE_AND_PORT_TO_PHYSICAL_ID(npeID,0);
    PortInfo *portInfo;

    if (portID >= IX_ETH_DB_NUMBER_OF_PORTS)
    {
        /* invalid port */
        return;
    }

    if (ixEthDBPortDefinitions[portID].type != IX_ETH_NPE)
    {
        /* not an NPE */
        return;
    }

    portInfo = &ixEthDBPortInfo[portID];
    
    ixOsalMutexUnlock(&portInfo->npeAckLock);
}

/**
 * @brief synchronizes the database with tree
 *
 * @param portID port ID of the NPE whose tree is to be scanned
 * @param eltBaseAddress memory base address of the NPE serialized tree
 * @param eltSize size in bytes of the NPE serialized tree
 *
 * Scans the NPE learning tree and resets the age of active database records.
 *
 * @internal
 */
IX_ETH_DB_PUBLIC
void ixEthDBNPESyncScan(IxEthDBPortId portID, void *eltBaseAddress, UINT32 eltSize)
{
    UINT32 eltEntryOffset;
    UINT32 entryPortID;

    /* invalidate cache */
    IX_OSAL_CACHE_INVALIDATE(eltBaseAddress, eltSize);

    for (eltEntryOffset = ELT_ROOT_OFFSET ; eltEntryOffset < eltSize ; eltEntryOffset += ELT_ENTRY_SIZE)
    {
        /* (eltBaseAddress + eltEntryOffset) points to a valid NPE tree node
         *
         * the format of the node is MAC[6 bytes]:PortID[1 byte]:Reserved[6 bits]:Active[1 bit]:Valid[1 bit]
         * therefore we can just use the pointer for database searches as only the first 6 bytes are checked
         */
        void *eltNodeAddress       = (void *) ((UINT32) eltBaseAddress + eltEntryOffset);

        /* debug */
        IX_ETH_DB_NPE_VERBOSE_TRACE("DB: (NPEAdaptor) checking node at offset %d...\n", eltEntryOffset / ELT_ENTRY_SIZE);

        if (IX_EDB_NPE_NODE_VALID(eltNodeAddress) != TRUE)
        {
            IX_ETH_DB_NPE_VERBOSE_TRACE("\t... node is empty\n");
        }
        else if (eltEntryOffset == ELT_ROOT_OFFSET)
        {
            IX_ETH_DB_NPE_VERBOSE_TRACE("\t... node is root\n");
        }

        if (IX_EDB_NPE_NODE_VALID(eltNodeAddress))
        {
            entryPortID = IX_ETHNPE_LOGICAL_ID_TO_PHYSICAL_ID(IX_EDB_NPE_NODE_PORT_ID(eltNodeAddress));

            /* check only active entries belonging to this port */
            if (ixEthDBPortInfo[portID].agingEnabled && IX_EDB_NPE_NODE_ACTIVE(eltNodeAddress) && (portID == entryPortID)
                && ((ixEthDBPortDefinitions[portID].capabilities & IX_ETH_ENTRY_AGING) == 0))
            {
                /* search record */
                HashNode *node = ixEthDBSearch((IxEthDBMacAddr *) eltNodeAddress, IX_ETH_DB_ALL_FILTERING_RECORDS);

                /* safety check, maybe user deleted record right before sync? */
                if (node != NULL)
                {
                    /* found record */
                    MacDescriptor *descriptor = (MacDescriptor *) node->data;

                    IX_ETH_DB_NPE_VERBOSE_TRACE("DB: (NPEAdaptor) synced entry [%s] already in the database, updating fields\n", mac2string(eltNodeAddress));

                    /* reset age - set to -1 so that maintenance will restore it to 0 (or more) when incrementing */
                    if (!descriptor->recordData.filteringData.staticEntry)
                    {
                        if (descriptor->type == IX_ETH_DB_FILTERING_RECORD)
                        {
                            descriptor->recordData.filteringData.age = AGE_RESET;
                        }
                        else if (descriptor->type == IX_ETH_DB_FILTERING_VLAN_RECORD)
                        {
                            descriptor->recordData.filteringVlanData.age = AGE_RESET;
                        }
                    }

                    /* end transaction */
                    ixEthDBReleaseHashNode(node);
                }
            }
            else
            {
                IX_ETH_DB_NPE_VERBOSE_TRACE("\t... found portID %d, we check only port %d\n", entryPortID, portID);
            }
        }
    }
}

/**
 * @brief writes a search tree in NPE format
 *
 * @param type type of records to be written into the NPE update zone
 * @param totalSize maximum size of the linearized tree
 * @param baseAddress memory base address where to write the NPE tree into
 * @param tree search tree to write in NPE format
 * @param blocks number of written 64-byte blocks
 * @param startIndex optimal binary search start index
 *
 * Serializes the given tree in NPE linear format