u-boot/drivers/net/npe/IxEthDBEvents.c
Marek Vasut 61e129885a dm: net: Move IXP NPE to drivers/net/
Signed-off-by: Marek Vasut <marex@denx.de>
Cc: Bryan Hundven <bryanhundven@gmail.com>
Cc: Michael Schwingen <rincewind@discworld.dascon.de>
Cc: Wolfgang Denk <wd@denx.de>
Cc: Albert Aribaud <albert.u.boot@aribaud.net>
Cc: U-Boot DM <u-boot-dm@lists.denx.de>
Cc: Joe Hershberger <joe.hershberger@ni.com>
2012-09-24 13:17:24 -05:00

520 lines
15 KiB
C

/**
* @file IxEthDBEvents.c
*
* @brief Implementation of the event processor component
*
* @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 --
*/
#include <IxNpeMh.h>
#include <IxFeatureCtrl.h>
#include "IxEthDB_p.h"
/* forward prototype declarations */
IX_ETH_DB_PUBLIC void ixEthDBEventProcessorLoop(void *);
IX_ETH_DB_PUBLIC void ixEthDBNPEEventCallback(IxNpeMhNpeId npeID, IxNpeMhMessage msg);
IX_ETH_DB_PRIVATE void ixEthDBProcessEvent(PortEvent *local_event, IxEthDBPortMap triggerPorts);
IX_ETH_DB_PRIVATE IxEthDBStatus ixEthDBTriggerPortUpdate(UINT32 eventType, IxEthDBMacAddr *macAddr, IxEthDBPortId portID, BOOL staticEntry);
IX_ETH_DB_PUBLIC IxEthDBStatus ixEthDBStartLearningFunction(void);
IX_ETH_DB_PUBLIC IxEthDBStatus ixEthDBStopLearningFunction(void);
/* data */
IX_ETH_DB_PRIVATE IxOsalSemaphore eventQueueSemaphore;
IX_ETH_DB_PRIVATE PortEventQueue eventQueue;
IX_ETH_DB_PRIVATE IxOsalMutex eventQueueLock;
IX_ETH_DB_PRIVATE IxOsalMutex portUpdateLock;
IX_ETH_DB_PRIVATE BOOL ixEthDBLearningShutdown = FALSE;
IX_ETH_DB_PRIVATE BOOL ixEthDBEventProcessorRunning = FALSE;
/* imported data */
extern HashTable dbHashtable;
/**
* @brief initializes the event processor
*
* Initializes the event processor queue and processing thread.
* Called from ixEthDBInit() DB-subcomponent master init function.
*
* @warning do not call directly
*
* @retval IX_ETH_DB_SUCCESS initialization was successful
* @retval IX_ETH_DB_FAIL initialization failed (OSAL or mutex init failure)
*
* @internal
*/
IX_ETH_DB_PUBLIC
IxEthDBStatus ixEthDBEventProcessorInit(void)
{
if (ixOsalMutexInit(&portUpdateLock) != IX_SUCCESS)
{
return IX_ETH_DB_FAIL;
}
if (ixOsalMutexInit(&eventQueueLock) != IX_SUCCESS)
{
return IX_ETH_DB_FAIL;
}
if (IX_FEATURE_CTRL_SWCONFIG_ENABLED ==
ixFeatureCtrlSwConfigurationCheck (IX_FEATURECTRL_ETH_LEARNING))
{
/* start processor loop thread */
if (ixEthDBStartLearningFunction() != IX_ETH_DB_SUCCESS)
{
return IX_ETH_DB_FAIL;
}
}
return IX_ETH_DB_SUCCESS;
}
/**
* @brief initializes the event queue and the event processor
*
* This function is called by the component initialization
* function, ixEthDBInit().
*
* @warning do not call directly
*
* @return IX_ETH_DB_SUCCESS if the operation completed
* successfully or IX_ETH_DB_FAIL otherwise
*
* @internal
*/
IX_ETH_DB_PUBLIC
IxEthDBStatus ixEthDBStartLearningFunction(void)
{
IxOsalThread eventProcessorThread;
IxOsalThreadAttr threadAttr;
threadAttr.name = "EthDB event thread";
threadAttr.stackSize = 32 * 1024; /* 32kbytes */
threadAttr.priority = 128;
/* reset event queue */
ixOsalMutexLock(&eventQueueLock, IX_OSAL_WAIT_FOREVER);
RESET_QUEUE(&eventQueue);
ixOsalMutexUnlock(&eventQueueLock);
/* init event queue semaphore */
if (ixOsalSemaphoreInit(&eventQueueSemaphore, 0) != IX_SUCCESS)
{
return IX_ETH_DB_FAIL;
}
ixEthDBLearningShutdown = FALSE;
/* create processor loop thread */
if (ixOsalThreadCreate(&eventProcessorThread, &threadAttr, ixEthDBEventProcessorLoop, NULL) != IX_SUCCESS)
{
return IX_ETH_DB_FAIL;
}
/* start event processor */
ixOsalThreadStart(&eventProcessorThread);
return IX_ETH_DB_SUCCESS;
}
/**
* @brief stops the event processor
*
* Stops the event processor and frees the event queue semaphore
* Called by the component de-initialization function, ixEthDBUnload()
*
* @warning do not call directly
*
* @return IX_ETH_DB_SUCCESS if the operation completed
* successfully or IX_ETH_DB_FAIL otherwise;
*
* @internal
*/
IX_ETH_DB_PUBLIC
IxEthDBStatus ixEthDBStopLearningFunction(void)
{
ixEthDBLearningShutdown = TRUE;
/* wake up event processing loop to actually process the shutdown event */
ixOsalSemaphorePost(&eventQueueSemaphore);
if (ixOsalSemaphoreDestroy(&eventQueueSemaphore) != IX_SUCCESS)
{
return IX_ETH_DB_FAIL;
}
return IX_ETH_DB_SUCCESS;
}
/**
* @brief default NPE event processing callback
*
* @param npeID ID of the NPE that generated the event
* @param msg NPE message (encapsulated event)
*
* Creates an event object on the Ethernet event processor queue
* and signals the new event by incrementing the event queue semaphore.
* Events are processed by @ref ixEthDBEventProcessorLoop() which runs
* at user level.
*
* @see ixEthDBEventProcessorLoop()
*
* @warning do not call directly
*
* @internal
*/
IX_ETH_DB_PUBLIC
void ixEthDBNPEEventCallback(IxNpeMhNpeId npeID, IxNpeMhMessage msg)
{
PortEvent *local_event;
IX_ETH_DB_IRQ_EVENTS_TRACE("DB: (Events) new event received by processor callback from port %d, id 0x%X\n", IX_ETH_DB_NPE_TO_PORT_ID(npeID), NPE_MSG_ID(msg), 0, 0, 0, 0);
if (CAN_ENQUEUE(&eventQueue))
{
TEST_FIXTURE_LOCK_EVENT_QUEUE;
local_event = QUEUE_HEAD(&eventQueue);
/* create event structure on queue */
local_event->eventType = NPE_MSG_ID(msg);
local_event->portID = IX_ETH_DB_NPE_TO_PORT_ID(npeID);
/* update queue */
PUSH_UPDATE_QUEUE(&eventQueue);
TEST_FIXTURE_UNLOCK_EVENT_QUEUE;
IX_ETH_DB_IRQ_EVENTS_TRACE("DB: (Events) Waking up main processor loop...\n", 0, 0, 0, 0, 0, 0);
/* increment event queue semaphore */
ixOsalSemaphorePost(&eventQueueSemaphore);
}
else
{
IX_ETH_DB_IRQ_EVENTS_TRACE("DB: (Events) Warning: could not enqueue event (overflow)\n", 0, 0, 0, 0, 0, 0);
}
}
/**
* @brief Ethernet event processor loop
*
* Extracts at most EVENT_PROCESSING_LIMIT batches of events and
* sends them for processing to @ref ixEthDBProcessEvent().
* Triggers port updates which normally follow learning events.
*
* @warning do not call directly, executes in separate thread
*
* @internal
*/
IX_ETH_DB_PUBLIC
void ixEthDBEventProcessorLoop(void *unused1)
{
IxEthDBPortMap triggerPorts;
IxEthDBPortId portIndex;
ixEthDBEventProcessorRunning = TRUE;
IX_ETH_DB_EVENTS_TRACE("DB: (Events) Event processor loop was started\n");
while (!ixEthDBLearningShutdown)
{
BOOL keepProcessing = TRUE;
UINT32 processedEvents = 0;
IX_ETH_DB_EVENTS_VERBOSE_TRACE("DB: (Events) Waiting for new learning event...\n");
ixOsalSemaphoreWait(&eventQueueSemaphore, IX_OSAL_WAIT_FOREVER);
IX_ETH_DB_EVENTS_VERBOSE_TRACE("DB: (Events) Received new event\n");
if (!ixEthDBLearningShutdown)
{
/* port update handling */
SET_EMPTY_DEPENDENCY_MAP(triggerPorts);
while (keepProcessing)
{
PortEvent local_event;
UINT32 intLockKey;
/* lock queue */
ixOsalMutexLock(&eventQueueLock, IX_OSAL_WAIT_FOREVER);
/* lock NPE interrupts */
intLockKey = ixOsalIrqLock();
/* extract event */
local_event = *(QUEUE_TAIL(&eventQueue));
SHIFT_UPDATE_QUEUE(&eventQueue);
ixOsalIrqUnlock(intLockKey);
ixOsalMutexUnlock(&eventQueueLock);
IX_ETH_DB_EVENTS_TRACE("DB: (Events) Processing event with ID 0x%X\n", local_event.eventType);
ixEthDBProcessEvent(&local_event, triggerPorts);
processedEvents++;
if (processedEvents > EVENT_PROCESSING_LIMIT /* maximum burst reached? */
|| ixOsalSemaphoreTryWait(&eventQueueSemaphore) != IX_SUCCESS) /* or empty queue? */
{
keepProcessing = FALSE;
}
}
ixEthDBUpdatePortLearningTrees(triggerPorts);
}
}
/* turn off automatic updates */
for (portIndex = 0 ; portIndex < IX_ETH_DB_NUMBER_OF_PORTS ; portIndex++)
{
ixEthDBPortInfo[portIndex].updateMethod.updateEnabled = FALSE;
}
ixEthDBEventProcessorRunning = FALSE;
}
/**
* @brief event processor routine
*
* @param event event to be processed
* @param triggerPorts port map accumulating ports to be updated
*
* Processes learning events by synchronizing the database with
* newly learnt data. Called only by @ref ixEthDBEventProcessorLoop().
*
* @warning do not call directly
*
* @internal
*/
IX_ETH_DB_PRIVATE
void ixEthDBProcessEvent(PortEvent *local_event, IxEthDBPortMap triggerPorts)
{
MacDescriptor recordTemplate;
switch (local_event->eventType)
{
case IX_ETH_DB_ADD_FILTERING_RECORD:
/* add record */
memset(&recordTemplate, 0, sizeof (recordTemplate));
memcpy(recordTemplate.macAddress, local_event->macAddr.macAddress, sizeof (IxEthDBMacAddr));
recordTemplate.type = IX_ETH_DB_FILTERING_RECORD;
recordTemplate.portID = local_event->portID;
recordTemplate.recordData.filteringData.staticEntry = local_event->staticEntry;
ixEthDBAdd(&recordTemplate, triggerPorts);
IX_ETH_DB_EVENTS_TRACE("DB: (Events) Added record on port %d\n", local_event->portID);
break;
case IX_ETH_DB_REMOVE_FILTERING_RECORD:
/* remove record */
memset(&recordTemplate, 0, sizeof (recordTemplate));
memcpy(recordTemplate.macAddress, local_event->macAddr.macAddress, sizeof (IxEthDBMacAddr));
recordTemplate.type = IX_ETH_DB_FILTERING_RECORD | IX_ETH_DB_FILTERING_VLAN_RECORD;
ixEthDBRemove(&recordTemplate, triggerPorts);
IX_ETH_DB_EVENTS_TRACE("DB: (Events) Removed record on port %d\n", local_event->portID);
break;
default:
/* can't handle/not interested in this event type */
ERROR_LOG("DB: (Events) Event processor received an unknown event type (0x%X)\n", local_event->eventType);
return;
}
}
/**
* @brief asynchronously adds a filtering record
* by posting an ADD_FILTERING_RECORD event to the event queue
*
* @param macAddr MAC address of the new record
* @param portID port ID of the new record
* @param staticEntry TRUE if record is static, FALSE if dynamic
*
* @return IX_ETH_DB_SUCCESS if the event creation was
* successfull or IX_ETH_DB_BUSY if the event queue is full
*
* @internal
*/
IX_ETH_DB_PUBLIC
IxEthDBStatus ixEthDBTriggerAddPortUpdate(IxEthDBMacAddr *macAddr, IxEthDBPortId portID, BOOL staticEntry)
{
MacDescriptor reference;
TEST_FIXTURE_INCREMENT_DB_CORE_ACCESS_COUNTER;
/* fill search fields */
memcpy(reference.macAddress, macAddr, sizeof (IxEthDBMacAddr));
reference.portID = portID;
/* set acceptable record types */
reference.type = IX_ETH_DB_ALL_FILTERING_RECORDS;
if (ixEthDBPeekHashEntry(&dbHashtable, IX_ETH_DB_MAC_PORT_KEY, &reference) == IX_ETH_DB_SUCCESS)
{
/* already have an identical record */
return IX_ETH_DB_SUCCESS;
}
else
{
return ixEthDBTriggerPortUpdate(IX_ETH_DB_ADD_FILTERING_RECORD, macAddr, portID, staticEntry);
}
}
/**
* @brief asynchronously removes a filtering record
* by posting a REMOVE_FILTERING_RECORD event to the event queue
*
* @param macAddr MAC address of the record to remove
* @param portID port ID of the record to remove
*
* @return IX_ETH_DB_SUCCESS if the event creation was
* successfull or IX_ETH_DB_BUSY if the event queue is full
*
* @internal
*/
IX_ETH_DB_PUBLIC
IxEthDBStatus ixEthDBTriggerRemovePortUpdate(IxEthDBMacAddr *macAddr, IxEthDBPortId portID)
{
if (ixEthDBPeek(macAddr, IX_ETH_DB_ALL_FILTERING_RECORDS) != IX_ETH_DB_NO_SUCH_ADDR)
{
return ixEthDBTriggerPortUpdate(IX_ETH_DB_REMOVE_FILTERING_RECORD, macAddr, portID, FALSE);
}
else
{
return IX_ETH_DB_NO_SUCH_ADDR;
}
}
/**
* @brief adds an ADD or REMOVE event to the main event queue
*
* @param eventType event type - IX_ETH_DB_ADD_FILTERING_RECORD
* to add and IX_ETH_DB_REMOVE_FILTERING_RECORD to remove a
* record.
*
* @return IX_ETH_DB_SUCCESS if the event was successfully
* sent or IX_ETH_DB_BUSY if the event queue is full
*
* @internal
*/
IX_ETH_DB_PRIVATE
IxEthDBStatus ixEthDBTriggerPortUpdate(UINT32 eventType, IxEthDBMacAddr *macAddr, IxEthDBPortId portID, BOOL staticEntry)
{
UINT32 intLockKey;
/* lock interrupts to protect queue */
intLockKey = ixOsalIrqLock();
if (CAN_ENQUEUE(&eventQueue))
{
PortEvent *queueEvent = QUEUE_HEAD(&eventQueue);
/* update fields on the queue */
memcpy(queueEvent->macAddr.macAddress, macAddr->macAddress, sizeof (IxEthDBMacAddr));
queueEvent->eventType = eventType;
queueEvent->portID = portID;
queueEvent->staticEntry = staticEntry;
PUSH_UPDATE_QUEUE(&eventQueue);
/* imcrement event queue semaphore */
ixOsalSemaphorePost(&eventQueueSemaphore);
/* unlock interrupts */
ixOsalIrqUnlock(intLockKey);
return IX_ETH_DB_SUCCESS;
}
else /* event queue full */
{
/* unlock interrupts */
ixOsalIrqUnlock(intLockKey);
return IX_ETH_DB_BUSY;
}
}
/**
* @brief Locks learning tree updates and port disable
*
*
* This function locks portUpdateLock single mutex. It is primarily used
* to avoid executing 'port disable' during ELT maintenance.
*
* @internal
*/
IX_ETH_DB_PUBLIC
void ixEthDBUpdateLock(void)
{
ixOsalMutexLock(&portUpdateLock, IX_OSAL_WAIT_FOREVER);
}
/**
* @brief Unlocks learning tree updates and port disable
*
*
* This function unlocks a portUpdateLock mutex. It is primarily used
* to avoid executing 'port disable' during ELT maintenance.
*
* @internal
*/
IX_ETH_DB_PUBLIC
void ixEthDBUpdateUnlock(void)
{
ixOsalMutexUnlock(&portUpdateLock);
}