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Diffstat (limited to 'cpu/ixp/npe/IxNpeMhSolicitedCbMgr.c')
| -rw-r--r-- | cpu/ixp/npe/IxNpeMhSolicitedCbMgr.c | 358 |
1 files changed, 358 insertions, 0 deletions
diff --git a/cpu/ixp/npe/IxNpeMhSolicitedCbMgr.c b/cpu/ixp/npe/IxNpeMhSolicitedCbMgr.c new file mode 100644 index 0000000..8e083a6 --- /dev/null +++ b/cpu/ixp/npe/IxNpeMhSolicitedCbMgr.c @@ -0,0 +1,358 @@ +/** + * @file IxNpeMhSolicitedCbMgr.c + * + * @author Intel Corporation + * @date 18 Jan 2002 + * + * @brief This file contains the implementation of the private API for the + * Solicited Callback Manager 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 -- +*/ +#ifndef IXNPEMHCONFIG_P_H +# define IXNPEMHSOLICITEDCBMGR_C +#else +# error "Error, IxNpeMhConfig_p.h should not be included before this definition." +#endif + +/* + * Put the system defined include files required. + */ + + +/* + * Put the user defined include files required. + */ + +#include "IxOsal.h" + +#include "IxNpeMhMacros_p.h" +#include "IxNpeMhSolicitedCbMgr_p.h" +#include "IxNpeMhConfig_p.h" +/* + * #defines and macros used in this file. + */ + +/* + * Typedefs whose scope is limited to this file. + */ + +/** + * @struct IxNpeMhSolicitedCallbackListEntry + * + * @brief This structure is used to store the information associated with + * an entry in the callback list. This consists of the ID of the send + * message (which indicates the ID of the corresponding response message) + * and the callback function pointer itself. + * + */ + +typedef struct IxNpeMhSolicitedCallbackListEntry +{ + /** message ID */ + IxNpeMhMessageId messageId; + + /** callback function pointer */ + IxNpeMhCallback callback; + + /** pointer to next entry in the list */ + struct IxNpeMhSolicitedCallbackListEntry *next; +} IxNpeMhSolicitedCallbackListEntry; + +/** + * @struct IxNpeMhSolicitedCallbackList + * + * @brief This structure is used to maintain the list of response + * callbacks. The number of entries in this list will be variable, and + * they will be stored in a linked list fashion for ease of addition and + * removal. The entries themselves are statically allocated, and are + * organised into a "free" list and a "callback" list. Adding an entry + * means taking an entry from the "free" list and adding it to the + * "callback" list. Removing an entry means removing it from the + * "callback" list and returning it to the "free" list. + */ + +typedef struct +{ + /** pointer to the head of the free list */ + IxNpeMhSolicitedCallbackListEntry *freeHead; + + /** pointer to the head of the callback list */ + IxNpeMhSolicitedCallbackListEntry *callbackHead; + + /** pointer to the tail of the callback list */ + IxNpeMhSolicitedCallbackListEntry *callbackTail; + + /** array of entries - the first entry is used as a dummy entry to */ + /* avoid the scenario of having an empty list, hence '+ 1' */ + IxNpeMhSolicitedCallbackListEntry entries[IX_NPEMH_MAX_CALLBACKS + 1]; +} IxNpeMhSolicitedCallbackList; + +/** + * @struct IxNpeMhSolicitedCbMgrStats + * + * @brief This structure is used to maintain statistics for the Solicited + * Callback Manager module. + */ + +typedef struct +{ + UINT32 saves; /**< callback list saves */ + UINT32 retrieves; /**< callback list retrieves */ +} IxNpeMhSolicitedCbMgrStats; + +/* + * Variable declarations global to this file only. Externs are followed by + * static variables. + */ + +PRIVATE IxNpeMhSolicitedCallbackList +ixNpeMhSolicitedCbMgrCallbackLists[IX_NPEMH_NUM_NPES]; + +PRIVATE IxNpeMhSolicitedCbMgrStats +ixNpeMhSolicitedCbMgrStats[IX_NPEMH_NUM_NPES]; + +/* + * Extern function prototypes. + */ + +/* + * Static function prototypes. + */ + +/* + * Function definition: ixNpeMhSolicitedCbMgrInitialize + */ + +void ixNpeMhSolicitedCbMgrInitialize (void) +{ + IxNpeMhNpeId npeId; + UINT32 localIndex; + IxNpeMhSolicitedCallbackList *list = NULL; + + IX_NPEMH_TRACE0 (IX_NPEMH_FN_ENTRY_EXIT, "Entering " + "ixNpeMhSolicitedCbMgrInitialize\n"); + + /* for each NPE ... */ + for (npeId = 0; npeId < IX_NPEMH_NUM_NPES; npeId++) + { + /* initialise a pointer to the list for convenience */ + list = &ixNpeMhSolicitedCbMgrCallbackLists[npeId]; + + /* for each entry in the list, after the dummy entry ... */ + for (localIndex = 1; localIndex <= IX_NPEMH_MAX_CALLBACKS; localIndex++) + { + /* initialise the entry */ + list->entries[localIndex].messageId = 0x00; + list->entries[localIndex].callback = NULL; + + /* if this entry is before the last entry */ + if (localIndex < IX_NPEMH_MAX_CALLBACKS) + { + /* chain this entry to the following entry */ + list->entries[localIndex].next = &(list->entries[localIndex + 1]); + } + else /* this entry is the last entry */ + { + /* the last entry isn't chained to anything */ + list->entries[localIndex].next = NULL; + } + } + + /* set the free list pointer to point to the first real entry */ + /* (all real entries begin chained together on the free list) */ + list->freeHead = &(list->entries[1]); + + /* set the callback list pointers to point to the dummy entry */ + /* (the callback list is initially empty) */ + list->callbackHead = &(list->entries[0]); + list->callbackTail = &(list->entries[0]); + } + + IX_NPEMH_TRACE0 (IX_NPEMH_FN_ENTRY_EXIT, "Exiting " + "ixNpeMhSolicitedCbMgrInitialize\n"); +} + +/* + * Function definition: ixNpeMhSolicitedCbMgrCallbackSave + */ + +IX_STATUS ixNpeMhSolicitedCbMgrCallbackSave ( + IxNpeMhNpeId npeId, + IxNpeMhMessageId solicitedMessageId, + IxNpeMhCallback solicitedCallback) +{ + IxNpeMhSolicitedCallbackList *list = NULL; + IxNpeMhSolicitedCallbackListEntry *callbackEntry = NULL; + + IX_NPEMH_TRACE0 (IX_NPEMH_FN_ENTRY_EXIT, "Entering " + "ixNpeMhSolicitedCbMgrCallbackSave\n"); + + /* initialise a pointer to the list for convenience */ + list = &ixNpeMhSolicitedCbMgrCallbackLists[npeId]; + + /* check to see if there are any entries in the free list */ + if (list->freeHead == NULL) + { + IX_NPEMH_ERROR_REPORT ("Solicited callback list is full\n"); + return IX_FAIL; + } + + /* there is an entry in the free list we can use */ + + /* update statistical info */ + ixNpeMhSolicitedCbMgrStats[npeId].saves++; + + /* remove a callback entry from the start of the free list */ + callbackEntry = list->freeHead; + list->freeHead = callbackEntry->next; + + /* fill in the callback entry with the new data */ + callbackEntry->messageId = solicitedMessageId; + callbackEntry->callback = solicitedCallback; + + /* the new callback entry will be added to the tail of the callback */ + /* list, so it isn't chained to anything */ + callbackEntry->next = NULL; + + /* chain new callback entry to the last entry of the callback list */ + list->callbackTail->next = callbackEntry; + list->callbackTail = callbackEntry; + + IX_NPEMH_TRACE0 (IX_NPEMH_FN_ENTRY_EXIT, "Exiting " + "ixNpeMhSolicitedCbMgrCallbackSave\n"); + + return IX_SUCCESS; +} + +/* + * Function definition: ixNpeMhSolicitedCbMgrCallbackRetrieve + */ + +void ixNpeMhSolicitedCbMgrCallbackRetrieve ( + IxNpeMhNpeId npeId, + IxNpeMhMessageId solicitedMessageId, + IxNpeMhCallback *solicitedCallback) +{ + IxNpeMhSolicitedCallbackList *list = NULL; + IxNpeMhSolicitedCallbackListEntry *callbackEntry = NULL; + IxNpeMhSolicitedCallbackListEntry *previousEntry = NULL; + + /* initialise a pointer to the list for convenience */ + list = &ixNpeMhSolicitedCbMgrCallbackLists[npeId]; + + /* initialise the callback entry to the first entry of the callback */ + /* list - we must skip over the dummy entry, which is the previous */ + callbackEntry = list->callbackHead->next; + previousEntry = list->callbackHead; + + /* traverse the callback list looking for an entry with a matching */ + /* message ID. note we also save the previous entry's pointer to */ + /* allow us to unchain the matching entry from the callback list */ + while ((callbackEntry != NULL) && + (callbackEntry->messageId != solicitedMessageId)) + { + previousEntry = callbackEntry; + callbackEntry = callbackEntry->next; + } + + /* if we didn't find a matching callback entry */ + if (callbackEntry == NULL) + { + /* return a NULL callback in the outgoing parameter */ + *solicitedCallback = NULL; + } + else /* we found a matching callback entry */ + { + /* update statistical info */ + ixNpeMhSolicitedCbMgrStats[npeId].retrieves++; + + /* return the callback in the outgoing parameter */ + *solicitedCallback = callbackEntry->callback; + + /* unchain callback entry by chaining previous entry to next */ + previousEntry->next = callbackEntry->next; + + /* if the callback entry is at the tail of the list */ + if (list->callbackTail == callbackEntry) + { + /* update the tail of the callback list */ + list->callbackTail = previousEntry; + } + + /* re-initialise the callback entry */ + callbackEntry->messageId = 0x00; + callbackEntry->callback = NULL; + + /* add the callback entry to the start of the free list */ + callbackEntry->next = list->freeHead; + list->freeHead = callbackEntry; + } +} + +/* + * Function definition: ixNpeMhSolicitedCbMgrShow + */ + +void ixNpeMhSolicitedCbMgrShow ( + IxNpeMhNpeId npeId) +{ + /* show the solicited callback list save counter */ + IX_NPEMH_SHOW ("Solicited callback list saves", + ixNpeMhSolicitedCbMgrStats[npeId].saves); + + /* show the solicited callback list retrieve counter */ + IX_NPEMH_SHOW ("Solicited callback list retrieves", + ixNpeMhSolicitedCbMgrStats[npeId].retrieves); +} + +/* + * Function definition: ixNpeMhSolicitedCbMgrShowReset + */ + +void ixNpeMhSolicitedCbMgrShowReset ( + IxNpeMhNpeId npeId) +{ + /* reset the solicited callback list save counter */ + ixNpeMhSolicitedCbMgrStats[npeId].saves = 0; + + /* reset the solicited callback list retrieve counter */ + ixNpeMhSolicitedCbMgrStats[npeId].retrieves = 0; +} |