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Diffstat (limited to 'cpu/ixp/npe/IxQMgrAqmIf.c')
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1 files changed, 963 insertions, 0 deletions
diff --git a/cpu/ixp/npe/IxQMgrAqmIf.c b/cpu/ixp/npe/IxQMgrAqmIf.c new file mode 100644 index 0000000..b27b3a2 --- /dev/null +++ b/cpu/ixp/npe/IxQMgrAqmIf.c @@ -0,0 +1,963 @@ +/* + * @file: IxQMgrAqmIf.c + * + * @author Intel Corporation + * @date 30-Oct-2001 + * + * @brief This component provides a set of functions for + * perfoming I/O on the AQM hardware. + * + * Design Notes: + * These functions are intended to be as fast as possible + * and as a result perform NO PARAMETER CHECKING. + * + * + * @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 -- +*/ + +/* + * Inlines are compiled as function when this is defined. + * N.B. Must be placed before #include of "IxQMgrAqmIf_p.h + */ +#ifndef IXQMGRAQMIF_P_H +# define IXQMGRAQMIF_C +#else +# error +#endif + +/* + * User defined include files. + */ +#include "IxOsal.h" +#include "IxQMgr.h" +#include "IxQMgrAqmIf_p.h" +#include "IxQMgrLog_p.h" + + +/* + * #defines and macros used in this file. + */ + +/* These defines are the bit offsets of the various fields of + * the queue configuration register + */ +#define IX_QMGR_Q_CONFIG_WRPTR_OFFSET 0x00 +#define IX_QMGR_Q_CONFIG_RDPTR_OFFSET 0x07 +#define IX_QMGR_Q_CONFIG_BADDR_OFFSET 0x0E +#define IX_QMGR_Q_CONFIG_ESIZE_OFFSET 0x16 +#define IX_QMGR_Q_CONFIG_BSIZE_OFFSET 0x18 +#define IX_QMGR_Q_CONFIG_NE_OFFSET 0x1A +#define IX_QMGR_Q_CONFIG_NF_OFFSET 0x1D + +#define IX_QMGR_BASE_ADDR_16_WORD_ALIGN 0x40 +#define IX_QMGR_BASE_ADDR_16_WORD_SHIFT 0x6 + +#define IX_QMGR_NE_NF_CLEAR_MASK 0x03FFFFFF +#define IX_QMGR_NE_MASK 0x7 +#define IX_QMGR_NF_MASK 0x7 +#define IX_QMGR_SIZE_MASK 0x3 +#define IX_QMGR_ENTRY_SIZE_MASK 0x3 +#define IX_QMGR_BADDR_MASK 0x003FC000 +#define IX_QMGR_RDPTR_MASK 0x7F +#define IX_QMGR_WRPTR_MASK 0x7F +#define IX_QMGR_RDWRPTR_MASK 0x00003FFF + +#define IX_QMGR_AQM_ADDRESS_SPACE_SIZE_IN_WORDS 0x1000 + +/* Base address of AQM SRAM */ +#define IX_QMGR_AQM_SRAM_BASE_ADDRESS_OFFSET \ +((IX_QMGR_QUECONFIG_BASE_OFFSET) + (IX_QMGR_QUECONFIG_SIZE)) + +/* Min buffer size used for generating buffer size in QUECONFIG */ +#define IX_QMGR_MIN_BUFFER_SIZE 16 + +/* Reset values of QMgr hardware registers */ +#define IX_QMGR_QUELOWSTAT_RESET_VALUE 0x33333333 +#define IX_QMGR_QUEUOSTAT_RESET_VALUE 0x00000000 +#define IX_QMGR_QUEUPPSTAT0_RESET_VALUE 0xFFFFFFFF +#define IX_QMGR_QUEUPPSTAT1_RESET_VALUE 0x00000000 +#define IX_QMGR_INT0SRCSELREG_RESET_VALUE 0x00000000 +#define IX_QMGR_QUEIEREG_RESET_VALUE 0x00000000 +#define IX_QMGR_QINTREG_RESET_VALUE 0xFFFFFFFF +#define IX_QMGR_QUECONFIG_RESET_VALUE 0x00000000 + +#define IX_QMGR_PHYSICAL_AQM_BASE_ADDRESS IX_OSAL_IXP400_QMGR_PHYS_BASE + +#define IX_QMGR_QUELOWSTAT_BITS_PER_Q (BITS_PER_WORD/IX_QMGR_QUELOWSTAT_NUM_QUE_PER_WORD) + +#define IX_QMGR_QUELOWSTAT_QID_MASK 0x7 +#define IX_QMGR_Q_CONFIG_ADDR_GET(qId)\ + (((qId) * IX_QMGR_NUM_BYTES_PER_WORD) +\ + IX_QMGR_QUECONFIG_BASE_OFFSET) + +#define IX_QMGR_ENTRY1_OFFSET 0 +#define IX_QMGR_ENTRY2_OFFSET 1 +#define IX_QMGR_ENTRY4_OFFSET 3 + +/* + * Variable declarations global to this file. Externs are followed by + * statics. + */ +UINT32 aqmBaseAddress = 0; +/* Store addresses and bit-masks for certain queue access and status registers. + * This is to facilitate inlining of QRead, QWrite and QStatusGet functions + * in IxQMgr,h + */ +extern IxQMgrQInlinedReadWriteInfo ixQMgrQInlinedReadWriteInfo[]; +UINT32 * ixQMgrAqmIfQueAccRegAddr[IX_QMGR_MAX_NUM_QUEUES]; +UINT32 ixQMgrAqmIfQueLowStatRegAddr[IX_QMGR_MIN_QUEUPP_QID]; +UINT32 ixQMgrAqmIfQueLowStatBitsOffset[IX_QMGR_MIN_QUEUPP_QID]; +UINT32 ixQMgrAqmIfQueLowStatBitsMask; +UINT32 ixQMgrAqmIfQueUppStat0RegAddr; +UINT32 ixQMgrAqmIfQueUppStat1RegAddr; +UINT32 ixQMgrAqmIfQueUppStat0BitMask[IX_QMGR_MIN_QUEUPP_QID]; +UINT32 ixQMgrAqmIfQueUppStat1BitMask[IX_QMGR_MIN_QUEUPP_QID]; + +/* + * Fast mutexes, one for each queue, used to protect peek & poke functions + */ +IxOsalFastMutex ixQMgrAqmIfPeekPokeFastMutex[IX_QMGR_MAX_NUM_QUEUES]; + +/* + * Function prototypes + */ +PRIVATE unsigned +watermarkToAqmWatermark (IxQMgrWMLevel watermark ); + +PRIVATE unsigned +entrySizeToAqmEntrySize (IxQMgrQEntrySizeInWords entrySize); + +PRIVATE unsigned +bufferSizeToAqmBufferSize (unsigned bufferSizeInWords); + +PRIVATE void +ixQMgrAqmIfRegistersReset (void); + +PRIVATE void +ixQMgrAqmIfEntryAddressGet (unsigned int entryIndex, + UINT32 configRegWord, + unsigned int qEntrySizeInwords, + unsigned int qSizeInWords, + UINT32 **address); +/* + * Function definitions + */ +void +ixQMgrAqmIfInit (void) +{ + UINT32 aqmVirtualAddr; + int i; + + /* The value of aqmBaseAddress depends on the logical address + * assigned by the MMU. + */ + aqmVirtualAddr = + (UINT32) IX_OSAL_MEM_MAP(IX_QMGR_PHYSICAL_AQM_BASE_ADDRESS, + IX_OSAL_IXP400_QMGR_MAP_SIZE); + IX_OSAL_ASSERT (aqmVirtualAddr); + + ixQMgrAqmIfBaseAddressSet (aqmVirtualAddr); + + ixQMgrAqmIfRegistersReset (); + + for (i = 0; i< IX_QMGR_MAX_NUM_QUEUES; i++) + { + ixOsalFastMutexInit(&ixQMgrAqmIfPeekPokeFastMutex[i]); + + /******************************************************************** + * Register addresses and bit masks are calculated and stored here to + * facilitate inlining of QRead, QWrite and QStatusGet functions in + * IxQMgr.h. + * These calculations are normally performed dynamically in inlined + * functions in IxQMgrAqmIf_p.h, and their semantics are reused here. + */ + + /* AQM Queue access reg addresses, per queue */ + ixQMgrAqmIfQueAccRegAddr[i] = + (UINT32 *)(aqmBaseAddress + IX_QMGR_Q_ACCESS_ADDR_GET(i)); + ixQMgrQInlinedReadWriteInfo[i].qAccRegAddr = + (volatile UINT32 *)(aqmBaseAddress + IX_QMGR_Q_ACCESS_ADDR_GET(i)); + + + ixQMgrQInlinedReadWriteInfo[i].qConfigRegAddr = + (volatile UINT32 *)(aqmBaseAddress + IX_QMGR_Q_CONFIG_ADDR_GET(i)); + + /* AQM Queue lower-group (0-31), only */ + if (i < IX_QMGR_MIN_QUEUPP_QID) + { + /* AQM Q underflow/overflow status register addresses, per queue */ + ixQMgrQInlinedReadWriteInfo[i].qUOStatRegAddr = + (volatile UINT32 *)(aqmBaseAddress + + IX_QMGR_QUEUOSTAT0_OFFSET + + ((i / IX_QMGR_QUEUOSTAT_NUM_QUE_PER_WORD) * + IX_QMGR_NUM_BYTES_PER_WORD)); + + /* AQM Q underflow status bit masks for status register per queue */ + ixQMgrQInlinedReadWriteInfo[i].qUflowStatBitMask = + (IX_QMGR_UNDERFLOW_BIT_OFFSET + 1) << + ((i & (IX_QMGR_QUEUOSTAT_NUM_QUE_PER_WORD - 1)) * + (BITS_PER_WORD / IX_QMGR_QUEUOSTAT_NUM_QUE_PER_WORD)); + + /* AQM Q overflow status bit masks for status register, per queue */ + ixQMgrQInlinedReadWriteInfo[i].qOflowStatBitMask = + (IX_QMGR_OVERFLOW_BIT_OFFSET + 1) << + ((i & (IX_QMGR_QUEUOSTAT_NUM_QUE_PER_WORD - 1)) * + (BITS_PER_WORD / IX_QMGR_QUEUOSTAT_NUM_QUE_PER_WORD)); + + /* AQM Q lower-group (0-31) status register addresses, per queue */ + ixQMgrAqmIfQueLowStatRegAddr[i] = aqmBaseAddress + + IX_QMGR_QUELOWSTAT0_OFFSET + + ((i / IX_QMGR_QUELOWSTAT_NUM_QUE_PER_WORD) * + IX_QMGR_NUM_BYTES_PER_WORD); + + /* AQM Q lower-group (0-31) status register bit offset */ + ixQMgrAqmIfQueLowStatBitsOffset[i] = + (i & (IX_QMGR_QUELOWSTAT_NUM_QUE_PER_WORD - 1)) * + (BITS_PER_WORD / IX_QMGR_QUELOWSTAT_NUM_QUE_PER_WORD); + } + else /* AQM Q upper-group (32-63), only */ + { + /* AQM Q upper-group (32-63) Nearly Empty status reg bit masks */ + ixQMgrAqmIfQueUppStat0BitMask[i - IX_QMGR_MIN_QUEUPP_QID] = + (1 << (i - IX_QMGR_MIN_QUEUPP_QID)); + + /* AQM Q upper-group (32-63) Full status register bit masks */ + ixQMgrAqmIfQueUppStat1BitMask[i - IX_QMGR_MIN_QUEUPP_QID] = + (1 << (i - IX_QMGR_MIN_QUEUPP_QID)); + } + } + + /* AQM Q lower-group (0-31) status register bit mask */ + ixQMgrAqmIfQueLowStatBitsMask = (1 << + (BITS_PER_WORD / + IX_QMGR_QUELOWSTAT_NUM_QUE_PER_WORD)) - 1; + + /* AQM Q upper-group (32-63) Nearly Empty status register address */ + ixQMgrAqmIfQueUppStat0RegAddr = aqmBaseAddress + IX_QMGR_QUEUPPSTAT0_OFFSET; + + /* AQM Q upper-group (32-63) Full status register address */ + ixQMgrAqmIfQueUppStat1RegAddr = aqmBaseAddress + IX_QMGR_QUEUPPSTAT1_OFFSET; +} + +/* + * Uninitialise the AqmIf module by unmapping memory, etc + */ +void +ixQMgrAqmIfUninit (void) +{ + UINT32 virtAddr; + + ixQMgrAqmIfBaseAddressGet (&virtAddr); + IX_OSAL_MEM_UNMAP (virtAddr); + ixQMgrAqmIfBaseAddressSet (0); +} + +/* + * Set the the logical base address of AQM + */ +void +ixQMgrAqmIfBaseAddressSet (UINT32 address) +{ + aqmBaseAddress = address; +} + +/* + * Get the logical base address of AQM + */ +void +ixQMgrAqmIfBaseAddressGet (UINT32 *address) +{ + *address = aqmBaseAddress; +} + +/* + * Get the logical base address of AQM SRAM + */ +void +ixQMgrAqmIfSramBaseAddressGet (UINT32 *address) +{ + *address = aqmBaseAddress + + IX_QMGR_AQM_SRAM_BASE_ADDRESS_OFFSET; +} + +/* + * This function will write the status bits of a queue + * specified by qId. + */ +void +ixQMgrAqmIfQRegisterBitsWrite (IxQMgrQId qId, + UINT32 registerBaseAddrOffset, + unsigned queuesPerRegWord, + UINT32 value) +{ + volatile UINT32 *registerAddress; + UINT32 registerWord; + UINT32 statusBitsMask; + UINT32 bitsPerQueue; + + bitsPerQueue = BITS_PER_WORD / queuesPerRegWord; + + /* + * Calculate the registerAddress + * multiple queues split accross registers + */ + registerAddress = (UINT32*)(aqmBaseAddress + + registerBaseAddrOffset + + ((qId / queuesPerRegWord) * + IX_QMGR_NUM_BYTES_PER_WORD)); + + /* Read the current data */ + ixQMgrAqmIfWordRead (registerAddress, ®isterWord); + + + if( (registerBaseAddrOffset == IX_QMGR_INT0SRCSELREG0_OFFSET) && + (qId == IX_QMGR_QUEUE_0) ) + { + statusBitsMask = 0x7 ; + + /* Queue 0 at INT0SRCSELREG should not corrupt the value bit-3 */ + value &= 0x7 ; + } + else + { + /* Calculate the mask for the status bits for this queue. */ + statusBitsMask = ((1 << bitsPerQueue) - 1); + statusBitsMask <<= ((qId & (queuesPerRegWord - 1)) * bitsPerQueue); + + /* Mask out bits in value that would overwrite other q data */ + value <<= ((qId & (queuesPerRegWord - 1)) * bitsPerQueue); + value &= statusBitsMask; + } + + /* Mask out bits to write to */ + registerWord &= ~statusBitsMask; + + + /* Set the write bits */ + registerWord |= value; + + /* + * Write the data + */ + ixQMgrAqmIfWordWrite (registerAddress, registerWord); +} + +/* + * This function generates the parameters that can be used to + * check if a Qs status matches the specified source select. + * It calculates which status word to check (statusWordOffset), + * the value to check the status against (checkValue) and the + * mask (mask) to mask out all but the bits to check in the status word. + */ +void +ixQMgrAqmIfQStatusCheckValsCalc (IxQMgrQId qId, + IxQMgrSourceId srcSel, + unsigned int *statusWordOffset, + UINT32 *checkValue, + UINT32 *mask) +{ + UINT32 shiftVal; + + if (qId < IX_QMGR_MIN_QUEUPP_QID) + { + switch (srcSel) + { + case IX_QMGR_Q_SOURCE_ID_E: + *checkValue = IX_QMGR_Q_STATUS_E_BIT_MASK; + *mask = IX_QMGR_Q_STATUS_E_BIT_MASK; + break; + case IX_QMGR_Q_SOURCE_ID_NE: + *checkValue = IX_QMGR_Q_STATUS_NE_BIT_MASK; + *mask = IX_QMGR_Q_STATUS_NE_BIT_MASK; + break; + case IX_QMGR_Q_SOURCE_ID_NF: + *checkValue = IX_QMGR_Q_STATUS_NF_BIT_MASK; + *mask = IX_QMGR_Q_STATUS_NF_BIT_MASK; + break; + case IX_QMGR_Q_SOURCE_ID_F: + *checkValue = IX_QMGR_Q_STATUS_F_BIT_MASK; + *mask = IX_QMGR_Q_STATUS_F_BIT_MASK; + break; + case IX_QMGR_Q_SOURCE_ID_NOT_E: + *checkValue = 0; + *mask = IX_QMGR_Q_STATUS_E_BIT_MASK; + break; + case IX_QMGR_Q_SOURCE_ID_NOT_NE: + *checkValue = 0; + *mask = IX_QMGR_Q_STATUS_NE_BIT_MASK; + break; + case IX_QMGR_Q_SOURCE_ID_NOT_NF: + *checkValue = 0; + *mask = IX_QMGR_Q_STATUS_NF_BIT_MASK; + break; + case IX_QMGR_Q_SOURCE_ID_NOT_F: + *checkValue = 0; + *mask = IX_QMGR_Q_STATUS_F_BIT_MASK; + break; + default: + /* Should never hit */ + IX_OSAL_ASSERT(0); + break; + } + + /* One nibble of status per queue so need to shift the + * check value and mask out to the correct position. + */ + shiftVal = (qId % IX_QMGR_QUELOWSTAT_NUM_QUE_PER_WORD) * + IX_QMGR_QUELOWSTAT_BITS_PER_Q; + + /* Calculate the which status word to check from the qId, + * 8 Qs status per word + */ + *statusWordOffset = qId / IX_QMGR_QUELOWSTAT_NUM_QUE_PER_WORD; + + *checkValue <<= shiftVal; + *mask <<= shiftVal; + } + else + { + /* One status word */ + *statusWordOffset = 0; + /* Single bits per queue and int source bit hardwired NE, + * Qs start at 32. + */ + *mask = 1 << (qId - IX_QMGR_MIN_QUEUPP_QID); + *checkValue = *mask; + } +} + +void +ixQMgrAqmIfQInterruptEnable (IxQMgrQId qId) +{ + volatile UINT32 *registerAddress; + UINT32 registerWord; + UINT32 actualBitOffset; + + if (qId < IX_QMGR_MIN_QUEUPP_QID) + { + registerAddress = (UINT32*)(aqmBaseAddress + IX_QMGR_QUEIEREG0_OFFSET); + } + else + { + registerAddress = (UINT32*)(aqmBaseAddress + IX_QMGR_QUEIEREG1_OFFSET); + } + + actualBitOffset = 1 << (qId % IX_QMGR_MIN_QUEUPP_QID); + + ixQMgrAqmIfWordRead (registerAddress, ®isterWord); + ixQMgrAqmIfWordWrite (registerAddress, (registerWord | actualBitOffset)); +} + +void +ixQMgrAqmIfQInterruptDisable (IxQMgrQId qId) +{ + volatile UINT32 *registerAddress; + UINT32 registerWord; + UINT32 actualBitOffset; + + if (qId < IX_QMGR_MIN_QUEUPP_QID) + { + registerAddress = (UINT32*)(aqmBaseAddress + IX_QMGR_QUEIEREG0_OFFSET); + } + else + { + registerAddress = (UINT32*)(aqmBaseAddress + IX_QMGR_QUEIEREG1_OFFSET); + } + + actualBitOffset = 1 << (qId % IX_QMGR_MIN_QUEUPP_QID); + + ixQMgrAqmIfWordRead (registerAddress, ®isterWord); + ixQMgrAqmIfWordWrite (registerAddress, registerWord & (~actualBitOffset)); +} + +void +ixQMgrAqmIfQueCfgWrite (IxQMgrQId qId, + IxQMgrQSizeInWords qSizeInWords, + IxQMgrQEntrySizeInWords entrySizeInWords, + UINT32 freeSRAMAddress) +{ + volatile UINT32 *cfgAddress = NULL; + UINT32 qCfg = 0; + UINT32 baseAddress = 0; + unsigned aqmEntrySize = 0; + unsigned aqmBufferSize = 0; + + /* Build config register */ + aqmEntrySize = entrySizeToAqmEntrySize (entrySizeInWords); + qCfg |= (aqmEntrySize&IX_QMGR_ENTRY_SIZE_MASK) << + IX_QMGR_Q_CONFIG_ESIZE_OFFSET; + + aqmBufferSize = bufferSizeToAqmBufferSize (qSizeInWords); + qCfg |= (aqmBufferSize&IX_QMGR_SIZE_MASK) << IX_QMGR_Q_CONFIG_BSIZE_OFFSET; + + /* baseAddress, calculated relative to aqmBaseAddress and start address */ + baseAddress = freeSRAMAddress - + (aqmBaseAddress + IX_QMGR_QUECONFIG_BASE_OFFSET); + + /* Verify base address aligned to a 16 word boundary */ + if ((baseAddress % IX_QMGR_BASE_ADDR_16_WORD_ALIGN) != 0) + { + IX_QMGR_LOG_ERROR0("ixQMgrAqmIfQueCfgWrite () address is not on 16 word boundary\n"); + } + /* Now convert it to a 16 word pointer as required by QUECONFIG register */ + baseAddress >>= IX_QMGR_BASE_ADDR_16_WORD_SHIFT; + + + qCfg |= (baseAddress << IX_QMGR_Q_CONFIG_BADDR_OFFSET); + + + cfgAddress = (UINT32*)(aqmBaseAddress + + IX_QMGR_Q_CONFIG_ADDR_GET(qId)); + + + /* NOTE: High and Low watermarks are set to zero */ + ixQMgrAqmIfWordWrite (cfgAddress, qCfg); +} + +void +ixQMgrAqmIfQueCfgRead (IxQMgrQId qId, + unsigned int numEntries, + UINT32 *baseAddress, + unsigned int *ne, + unsigned int *nf, + UINT32 *readPtr, + UINT32 *writePtr) +{ + UINT32 qcfg; + UINT32 *cfgAddress = (UINT32*)(aqmBaseAddress + IX_QMGR_Q_CONFIG_ADDR_GET(qId)); + unsigned int qEntrySizeInwords; + unsigned int qSizeInWords; + UINT32 *readPtr_ = NULL; + + /* Read the queue configuration register */ + ixQMgrAqmIfWordRead (cfgAddress, &qcfg); + + /* Extract the base address */ + *baseAddress = (UINT32)((qcfg & IX_QMGR_BADDR_MASK) >> + (IX_QMGR_Q_CONFIG_BADDR_OFFSET)); + + /* Base address is a 16 word pointer from the start of AQM SRAM. + * Convert to absolute word address. + */ + *baseAddress <<= IX_QMGR_BASE_ADDR_16_WORD_SHIFT; + *baseAddress += (UINT32)IX_QMGR_QUECONFIG_BASE_OFFSET; + + /* + * Extract the watermarks. 0->0 entries, 1->1 entries, 2->2 entries, 3->4 entries...... + * If ne > 0 ==> neInEntries = 2^(ne - 1) + * If ne == 0 ==> neInEntries = 0 + * The same applies. + */ + *ne = ((qcfg) >> (IX_QMGR_Q_CONFIG_NE_OFFSET)) & IX_QMGR_NE_MASK; + *nf = ((qcfg) >> (IX_QMGR_Q_CONFIG_NF_OFFSET)) & IX_QMGR_NF_MASK; + + if (0 != *ne) + { + *ne = 1 << (*ne - 1); + } + if (0 != *nf) + { + *nf = 1 << (*nf - 1); + } + + /* Get the queue entry size in words */ + qEntrySizeInwords = ixQMgrQEntrySizeInWordsGet (qId); + + /* Get the queue size in words */ + qSizeInWords = ixQMgrQSizeInWordsGet (qId); + + ixQMgrAqmIfEntryAddressGet (0/* Entry 0. i.e the readPtr*/, + qcfg, + qEntrySizeInwords, + qSizeInWords, + &readPtr_); + *readPtr = (UINT32)readPtr_; + *readPtr -= (UINT32)aqmBaseAddress;/* Offset, not absolute address */ + + *writePtr = (qcfg >> IX_QMGR_Q_CONFIG_WRPTR_OFFSET) & IX_QMGR_WRPTR_MASK; + *writePtr = *baseAddress + (*writePtr * (IX_QMGR_NUM_BYTES_PER_WORD)); + return; +} + +unsigned +ixQMgrAqmIfLog2 (unsigned number) +{ + unsigned count = 0; + + /* + * N.B. this function will return 0 + * for ixQMgrAqmIfLog2 (0) + */ + while (number/2) + { + number /=2; + count++; + } + + return count; +} + +void ixQMgrAqmIfIntSrcSelReg0Bit3Set (void) +{ + + volatile UINT32 *registerAddress; + UINT32 registerWord; + + /* + * Calculate the registerAddress + * multiple queues split accross registers + */ + registerAddress = (UINT32*)(aqmBaseAddress + + IX_QMGR_INT0SRCSELREG0_OFFSET); + + /* Read the current data */ + ixQMgrAqmIfWordRead (registerAddress, ®isterWord); + + /* Set the write bits */ + registerWord |= (1<<IX_QMGR_INT0SRCSELREG0_BIT3) ; + + /* + * Write the data + */ + ixQMgrAqmIfWordWrite (registerAddress, registerWord); +} + + +void +ixQMgrAqmIfIntSrcSelWrite (IxQMgrQId qId, + IxQMgrSourceId sourceId) +{ + ixQMgrAqmIfQRegisterBitsWrite (qId, + IX_QMGR_INT0SRCSELREG0_OFFSET, + IX_QMGR_INTSRC_NUM_QUE_PER_WORD, + sourceId); +} + + + +void +ixQMgrAqmIfWatermarkSet (IxQMgrQId qId, + unsigned ne, + unsigned nf) +{ + volatile UINT32 *address = 0; + UINT32 value = 0; + unsigned aqmNeWatermark = 0; + unsigned aqmNfWatermark = 0; + + address = (UINT32*)(aqmBaseAddress + + IX_QMGR_Q_CONFIG_ADDR_GET(qId)); + + aqmNeWatermark = watermarkToAqmWatermark (ne); + aqmNfWatermark = watermarkToAqmWatermark (nf); + + /* Read the current watermarks */ + ixQMgrAqmIfWordRead (address, &value); + + /* Clear out the old watermarks */ + value &= IX_QMGR_NE_NF_CLEAR_MASK; + + /* Generate the value to write */ + value |= (aqmNeWatermark << IX_QMGR_Q_CONFIG_NE_OFFSET) | + (aqmNfWatermark << IX_QMGR_Q_CONFIG_NF_OFFSET); + + ixQMgrAqmIfWordWrite (address, value); + +} + +PRIVATE void +ixQMgrAqmIfEntryAddressGet (unsigned int entryIndex, + UINT32 configRegWord, + unsigned int qEntrySizeInwords, + unsigned int qSizeInWords, + UINT32 **address) +{ + UINT32 readPtr; + UINT32 baseAddress; + UINT32 *topOfAqmSram; + + topOfAqmSram = ((UINT32 *)aqmBaseAddress + IX_QMGR_AQM_ADDRESS_SPACE_SIZE_IN_WORDS); + + /* Extract the base address */ + baseAddress = (UINT32)((configRegWord & IX_QMGR_BADDR_MASK) >> + (IX_QMGR_Q_CONFIG_BADDR_OFFSET)); + + /* Base address is a 16 word pointer from the start of AQM SRAM. + * Convert to absolute word address. + */ + baseAddress <<= IX_QMGR_BASE_ADDR_16_WORD_SHIFT; + baseAddress += ((UINT32)aqmBaseAddress + (UINT32)IX_QMGR_QUECONFIG_BASE_OFFSET); + + /* Extract the read pointer. Read pointer is a word pointer */ + readPtr = (UINT32)((configRegWord >> + IX_QMGR_Q_CONFIG_RDPTR_OFFSET)&IX_QMGR_RDPTR_MASK); + + /* Read/Write pointers(word pointers) are offsets from the queue buffer space base address. + * Calculate the absolute read pointer address. NOTE: Queues are circular buffers. + */ + readPtr = (readPtr + (entryIndex * qEntrySizeInwords)) & (qSizeInWords - 1); /* Mask by queue size */ + *address = (UINT32 *)(baseAddress + (readPtr * (IX_QMGR_NUM_BYTES_PER_WORD))); + + switch (qEntrySizeInwords) + { + case IX_QMGR_Q_ENTRY_SIZE1: + IX_OSAL_ASSERT((*address + IX_QMGR_ENTRY1_OFFSET) < topOfAqmSram); + break; + case IX_QMGR_Q_ENTRY_SIZE2: + IX_OSAL_ASSERT((*address + IX_QMGR_ENTRY2_OFFSET) < topOfAqmSram); + break; + case IX_QMGR_Q_ENTRY_SIZE4: + IX_OSAL_ASSERT((*address + IX_QMGR_ENTRY4_OFFSET) < topOfAqmSram); + break; + default: + IX_QMGR_LOG_ERROR0("Invalid Q Entry size passed to ixQMgrAqmIfEntryAddressGet"); + break; + } + +} + +IX_STATUS +ixQMgrAqmIfQPeek (IxQMgrQId qId, + unsigned int entryIndex, + unsigned int *entry) +{ + UINT32 *cfgRegAddress = (UINT32*)(aqmBaseAddress + IX_QMGR_Q_CONFIG_ADDR_GET(qId)); + UINT32 *entryAddress = NULL; + UINT32 configRegWordOnEntry; + UINT32 configRegWordOnExit; + unsigned int qEntrySizeInwords; + unsigned int qSizeInWords; + + /* Get the queue entry size in words */ + qEntrySizeInwords = ixQMgrQEntrySizeInWordsGet (qId); + + /* Get the queue size in words */ + qSizeInWords = ixQMgrQSizeInWordsGet (qId); + + /* Read the config register */ + ixQMgrAqmIfWordRead (cfgRegAddress, &configRegWordOnEntry); + + /* Get the entry address */ + ixQMgrAqmIfEntryAddressGet (entryIndex, + configRegWordOnEntry, + qEntrySizeInwords, + qSizeInWords, + &entryAddress); + + /* Get the lock or return busy */ + if (IX_SUCCESS != ixOsalFastMutexTryLock(&ixQMgrAqmIfPeekPokeFastMutex[qId])) + { + return IX_FAIL; + } + + while(qEntrySizeInwords--) + { + ixQMgrAqmIfWordRead (entryAddress++, entry++); + } + + /* Release the lock */ + ixOsalFastMutexUnlock(&ixQMgrAqmIfPeekPokeFastMutex[qId]); + + /* Read the config register */ + ixQMgrAqmIfWordRead (cfgRegAddress, &configRegWordOnExit); + + /* Check that the read and write pointers have not changed */ + if (configRegWordOnEntry != configRegWordOnExit) + { + return IX_FAIL; + } + + return IX_SUCCESS; +} + +IX_STATUS +ixQMgrAqmIfQPoke (IxQMgrQId qId, + unsigned entryIndex, + unsigned int *entry) +{ + UINT32 *cfgRegAddress = (UINT32*)(aqmBaseAddress + IX_QMGR_Q_CONFIG_ADDR_GET(qId)); + UINT32 *entryAddress = NULL; + UINT32 configRegWordOnEntry; + UINT32 configRegWordOnExit; + unsigned int qEntrySizeInwords; + unsigned int qSizeInWords; + + /* Get the queue entry size in words */ + qEntrySizeInwords = ixQMgrQEntrySizeInWordsGet (qId); + + /* Get the queue size in words */ + qSizeInWords = ixQMgrQSizeInWordsGet (qId); + + /* Read the config register */ + ixQMgrAqmIfWordRead (cfgRegAddress, &configRegWordOnEntry); + + /* Get the entry address */ + ixQMgrAqmIfEntryAddressGet (entryIndex, + configRegWordOnEntry, + qEntrySizeInwords, + qSizeInWords, + &entryAddress); + + /* Get the lock or return busy */ + if (IX_SUCCESS != ixOsalFastMutexTryLock(&ixQMgrAqmIfPeekPokeFastMutex[qId])) + { + return IX_FAIL; + } + + /* Else read the entry directly from SRAM. This will not move the read pointer */ + while(qEntrySizeInwords--) + { + ixQMgrAqmIfWordWrite (entryAddress++, *entry++); + } + + /* Release the lock */ + ixOsalFastMutexUnlock(&ixQMgrAqmIfPeekPokeFastMutex[qId]); + + /* Read the config register */ + ixQMgrAqmIfWordRead (cfgRegAddress, &configRegWordOnExit); + + /* Check that the read and write pointers have not changed */ + if (configRegWordOnEntry != configRegWordOnExit) + { + return IX_FAIL; + } + + return IX_SUCCESS; +} + +PRIVATE unsigned +watermarkToAqmWatermark (IxQMgrWMLevel watermark ) +{ + unsigned aqmWatermark = 0; + + /* + * Watermarks 0("000"),1("001"),2("010"),4("011"), + * 8("100"),16("101"),32("110"),64("111") + */ + aqmWatermark = ixQMgrAqmIfLog2 (watermark * 2); + + return aqmWatermark; +} + +PRIVATE unsigned +entrySizeToAqmEntrySize (IxQMgrQEntrySizeInWords entrySize) +{ + /* entrySize 1("00"),2("01"),4("10") */ + return (ixQMgrAqmIfLog2 (entrySize)); +} + +PRIVATE unsigned +bufferSizeToAqmBufferSize (unsigned bufferSizeInWords) +{ + /* bufferSize 16("00"),32("01),64("10"),128("11") */ + return (ixQMgrAqmIfLog2 (bufferSizeInWords / IX_QMGR_MIN_BUFFER_SIZE)); +} + +/* + * Reset AQM registers to default values. + */ +PRIVATE void +ixQMgrAqmIfRegistersReset (void) +{ + volatile UINT32 *qConfigWordAddress = NULL; + unsigned int i; + + /* + * Need to initialize AQM hardware registers to an initial + * value as init may have been called as a result of a soft + * reset. i.e. soft reset does not reset hardware registers. + */ + + /* Reset queues 0..31 status registers 0..3 */ + ixQMgrAqmIfWordWrite((UINT32 *)(aqmBaseAddress + IX_QMGR_QUELOWSTAT0_OFFSET), + IX_QMGR_QUELOWSTAT_RESET_VALUE); + ixQMgrAqmIfWordWrite((UINT32 *)(aqmBaseAddress + IX_QMGR_QUELOWSTAT1_OFFSET), + IX_QMGR_QUELOWSTAT_RESET_VALUE); + ixQMgrAqmIfWordWrite((UINT32 *)(aqmBaseAddress + IX_QMGR_QUELOWSTAT2_OFFSET), + IX_QMGR_QUELOWSTAT_RESET_VALUE); + ixQMgrAqmIfWordWrite((UINT32 *)(aqmBaseAddress + IX_QMGR_QUELOWSTAT3_OFFSET), + IX_QMGR_QUELOWSTAT_RESET_VALUE); + + /* Reset underflow/overflow status registers 0..1 */ + ixQMgrAqmIfWordWrite((UINT32 *)(aqmBaseAddress + IX_QMGR_QUEUOSTAT0_OFFSET), + IX_QMGR_QUEUOSTAT_RESET_VALUE); + ixQMgrAqmIfWordWrite((UINT32 *)(aqmBaseAddress + IX_QMGR_QUEUOSTAT1_OFFSET), + IX_QMGR_QUEUOSTAT_RESET_VALUE); + + /* Reset queues 32..63 nearly empty status registers */ + ixQMgrAqmIfWordWrite((UINT32 *)(aqmBaseAddress + IX_QMGR_QUEUPPSTAT0_OFFSET), + IX_QMGR_QUEUPPSTAT0_RESET_VALUE); + + /* Reset queues 32..63 full status registers */ + ixQMgrAqmIfWordWrite((UINT32 *)(aqmBaseAddress + IX_QMGR_QUEUPPSTAT1_OFFSET), + IX_QMGR_QUEUPPSTAT1_RESET_VALUE); + + /* Reset int0 status flag source select registers 0..3 */ + ixQMgrAqmIfWordWrite((UINT32 *)(aqmBaseAddress + IX_QMGR_INT0SRCSELREG0_OFFSET), + IX_QMGR_INT0SRCSELREG_RESET_VALUE); + ixQMgrAqmIfWordWrite((UINT32 *)(aqmBaseAddress + IX_QMGR_INT0SRCSELREG1_OFFSET), + IX_QMGR_INT0SRCSELREG_RESET_VALUE); + ixQMgrAqmIfWordWrite((UINT32 *)(aqmBaseAddress + IX_QMGR_INT0SRCSELREG2_OFFSET), + IX_QMGR_INT0SRCSELREG_RESET_VALUE); + ixQMgrAqmIfWordWrite((UINT32 *)(aqmBaseAddress + IX_QMGR_INT0SRCSELREG3_OFFSET), + IX_QMGR_INT0SRCSELREG_RESET_VALUE); + + /* Reset queue interrupt enable register 0..1 */ + ixQMgrAqmIfWordWrite((UINT32 *)(aqmBaseAddress + IX_QMGR_QUEIEREG0_OFFSET), + IX_QMGR_QUEIEREG_RESET_VALUE); + ixQMgrAqmIfWordWrite((UINT32 *)(aqmBaseAddress + IX_QMGR_QUEIEREG1_OFFSET), + IX_QMGR_QUEIEREG_RESET_VALUE); + + /* Reset queue interrupt register 0..1 */ + ixQMgrAqmIfWordWrite((UINT32 *)(aqmBaseAddress + IX_QMGR_QINTREG0_OFFSET), + IX_QMGR_QINTREG_RESET_VALUE); + ixQMgrAqmIfWordWrite((UINT32 *)(aqmBaseAddress + IX_QMGR_QINTREG1_OFFSET), + IX_QMGR_QINTREG_RESET_VALUE); + + /* Reset queue configuration words 0..63 */ + qConfigWordAddress = (UINT32 *)(aqmBaseAddress + IX_QMGR_QUECONFIG_BASE_OFFSET); + for (i = 0; i < (IX_QMGR_QUECONFIG_SIZE / sizeof(UINT32)); i++) + { + ixQMgrAqmIfWordWrite(qConfigWordAddress, + IX_QMGR_QUECONFIG_RESET_VALUE); + /* Next word */ + qConfigWordAddress++; + } +} + |