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u-boot/cpu/ixp/npe/include/IxAtmdAcc.h

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* Update Intel IXP4xx support - Add IXP4xx NPE ethernet MAC support - Add support for Intel IXDPG425 board - Add support for Prodrive PDNB3 board - Add IRQ support Patch by Stefan Roese, 23 May 2006 [This patch does not include cpu/ixp/npe/IxNpeMicrocode.c which still sufferes from licensing issues. Blame Intel.]
19 years ago
/**
* @file IxAtmdAcc.h
*
* @date 07-Nov-2001
*
* @brief IxAtmdAcc Public API
*
* This file contains the public API of IxAtmdAcc, related to the
* data functions of the 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 --
*/
/* ------------------------------------------------------
Doxygen group definitions
------------------------------------------------------ */
/**
*
* @defgroup IxAtmdAccAPI IXP400 ATM Driver Access (IxAtmdAcc) API
*
* @brief The public API for the IXP400 Atm Driver Data component
*
* IxAtmdAcc is the low level interface by which AAL0/AAL5 and
* OAM data gets transmitted to,and received from the Utopia bus.
*
* For AAL0/AAL5 services transmit and receive connections may
* be established independantly for unique combinations of
* port,VPI,and VCI.
*
* Two AAL0 services supporting 48 or 52 byte cell data are provided.
* Submitted AAL0 PDUs must be a multiple of the cell data size (48/52).
* AAL0_52 is a raw cell service the client must format
* the PDU with an ATM cell header (excluding HEC) at the start of
* each cell, note that AtmdAcc does not validate the cell headers in
* a submitted PDU.
*
* OAM cells cannot be received over the AAL0 service but instead
* are received over a dedicated OAM service.
*
* For the OAM service an "OAM Tx channel" may be enabled for a port
* by establishing a single dedicated OAM Tx connection on that port.
* A single "OAM Rx channel" for all ports may be enabled by
* establishing a dedicated OAM Rx connection.
*
* The OAM service allows buffers containing 52 byte OAM F4/F5 cells
* to be transmitted and received over the dedicated OAM channels.
* HEC is appended/removed, and CRC-10 performed by the NPE. The OAM
* service offered by AtmdAcc is a raw cell transport service.
* It is assumed that ITU I.610 procedures that make use of this
* service are implemented above AtmdAcc.
*
* Note that the dedicated OAM connections are established on
* reserved VPI,VCI, and (in the case of Rx) port values defined below.
* These values are used purely to descriminate the dedicated OAM channels
* and do not identify a particular OAM F4/F5 flow. F4/F5 flows may be
* realised for particluar VPI/VCIs by manipulating the VPI,VCI
* fields of the ATM cell headers of cells in the buffers passed
* to AtmdAcc. Note that AtmdAcc does not validate the cell headers
* in a submitted OAM PDU.
*
*
*
* This part is related to the User datapath processing
*
* @{
*/
#ifndef IXATMDACC_H
#define IXATMDACC_H
#include "IxAtmTypes.h"
/* ------------------------------------------------------
AtmdAcc Data Types definition
------------------------------------------------------ */
/**
*
* @ingroup IxAtmdAccAPI
*
* @def IX_ATMDACC_WARNING
*
* @brief Warning return code
*
* This constant is used to tell IxAtmDAcc user about a special case.
*
*/
#define IX_ATMDACC_WARNING 2
/**
*
* @ingroup IxAtmdAccAPI
*
* @def IX_ATMDACC_BUSY
*
* @brief Busy return code
*
* This constant is used to tell IxAtmDAcc user that the request
* is correct, but cannot be processed because the IxAtmAcc resources
* are already used. The user has to retry its request later
*
*/
#define IX_ATMDACC_BUSY 3
/**
*
* @ingroup IxAtmdAccAPI
*
* @def IX_ATMDACC_RESOURCES_STILL_ALLOCATED
*
* @brief Disconnect return code
*
* This constant is used to tell IxAtmDAcc user that the disconnect
* functions are not complete because the resources used by the driver
* are not yet released. The user has to retry the disconnect call
* later.
*
*/
#define IX_ATMDACC_RESOURCES_STILL_ALLOCATED 4
/**
*
* @ingroup IxAtmdAccAPI
*
* @def IX_ATMDACC_DEFAULT_REPLENISH_COUNT
*
* @brief Default resources usage for RxVcFree replenish mechanism
*
* This constant is used to tell IxAtmDAcc to allocate and use
* the minimum of resources for rx free replenish.
*
* @sa ixAtmdAccRxVcConnect
*/
#define IX_ATMDACC_DEFAULT_REPLENISH_COUNT 0
/**
* @ingroup IxAtmdAccAPI
*
* @def IX_ATMDACC_OAM_TX_VPI
*
* @brief The reserved value used for the dedicated OAM
* Tx connection. This "well known" value is used by atmdAcc and
* its clients to dsicriminate the OAM channel, and should be chosen so
* that it does not coencide with the VPI value used in an AAL0/AAL5 connection.
* Any attempt to connect a service type other than OAM on this VPI will fail.
*
*
*/
#define IX_ATMDACC_OAM_TX_VPI 0
/**
* @ingroup IxAtmdAccAPI
*
* @def IX_ATMDACC_OAM_TX_VCI
*
* @brief The reserved value used for the dedicated OAM
* Tx connection. This "well known" value is used by atmdAcc and
* its clients to dsicriminate the OAM channel, and should be chosen so
* that it does not coencide with the VCI value used in an AAL0/AAL5 connection.
* Any attempt to connect a service type other than OAM on this VCI will fail.
*/
#define IX_ATMDACC_OAM_TX_VCI 0
/**
* @ingroup IxAtmdAccAPI
*
* @def IX_ATMDACC_OAM_RX_PORT
*
* @brief The reserved dummy PORT used for all dedicated OAM
* Rx connections. Note that this is not a real port but must
* have a value that lies within the valid range of port values.
*/
#define IX_ATMDACC_OAM_RX_PORT IX_UTOPIA_PORT_0
/**
* @ingroup IxAtmdAccAPI
*
* @def IX_ATMDACC_OAM_RX_VPI
*
* @brief The reserved value value used for the dedicated OAM
* Rx connection. This value should be chosen so that it does not
* coencide with the VPI value used in an AAL0/AAL5 connection.
* Any attempt to connect a service type other than OAM on this VPI will fail.
*/
#define IX_ATMDACC_OAM_RX_VPI 0
/**
* @ingroup IxAtmdAccAPI
*
* @def IX_ATMDACC_OAM_RX_VCI
*
* @brief The reserved value value used for the dedicated OAM
* Rx connection. This value should be chosen so that it does not
* coencide with the VCI value used in an AAL0/AAL5 connection.
* Any attempt to connect a service type other than OAM on this VCI will fail.
*/
#define IX_ATMDACC_OAM_RX_VCI 0
/**
* @enum IxAtmdAccPduStatus
*
* @ingroup IxAtmdAccAPI
*
* @brief IxAtmdAcc Pdu status :
*
* IxAtmdAccPduStatus is used during a RX operation to indicate
* the status of the received PDU
*
*/
typedef enum
{
IX_ATMDACC_AAL0_VALID = 0, /**< aal0 pdu */
IX_ATMDACC_OAM_VALID, /**< OAM pdu */
IX_ATMDACC_AAL2_VALID, /**< aal2 pdu @b reserved for future use */
IX_ATMDACC_AAL5_VALID, /**< aal5 pdu complete and trailer is valid */
IX_ATMDACC_AAL5_PARTIAL, /**< aal5 pdu not complete, trailer is missing */
IX_ATMDACC_AAL5_CRC_ERROR, /**< aal5 pdu not complete, crc error/length error */
IX_ATMDACC_MBUF_RETURN /**< empty buffer returned to the user */
} IxAtmdAccPduStatus;
/**
*
* @enum IxAtmdAccAalType
*
* @ingroup IxAtmdAccAPI
*
* @brief IxAtmdAcc AAL Service Type :
*
* IxAtmdAccAalType defines the type of traffic to run on this VC
*
*/
typedef enum
{
IX_ATMDACC_AAL5, /**< ITU-T AAL5 */
IX_ATMDACC_AAL2, /**< ITU-T AAL2 @b reserved for future use */
IX_ATMDACC_AAL0_48, /**< AAL0 48 byte payloads (cell header is added by NPE)*/
IX_ATMDACC_AAL0_52, /**< AAL0 52 byte cell data (HEC is added by NPE) */
IX_ATMDACC_OAM, /**< OAM cell transport service (HEC is added by NPE)*/
IX_ATMDACC_MAX_SERVICE_TYPE /**< not a service, used for parameter validation */
} IxAtmdAccAalType;
/**
*
* @enum IxAtmdAccClpStatus
*
* @ingroup IxAtmdAccAPI
*
* @brief IxAtmdAcc CLP indication
*
* IxAtmdAccClpStatus defines the CLP status of the current PDU
*
*/
typedef enum
{
IX_ATMDACC_CLP_NOT_SET = 0, /**< CLP indication is not set */
IX_ATMDACC_CLP_SET = 1 /**< CLP indication is set */
} IxAtmdAccClpStatus;
/**
* @typedef IxAtmdAccUserId
*
* @ingroup IxAtmdAccAPI
*
* @brief User-supplied Id
*
* IxAtmdAccUserId is passed through callbacks and allows the
* IxAtmdAcc user to identify the source of a call back. The range of
* this user-owned Id is [0...2^32-1)].
*
* The user provides this own Ids on a per-channel basis as a parameter
* in a call to @a ixAtmdAccRxVcConnect() or @a ixAtmdAccRxVcConnect()
*
* @sa ixAtmdAccRxVcConnect
* @sa ixAtmdAccTxVcConnect
*
*/
typedef unsigned int IxAtmdAccUserId;
/* ------------------------------------------------------
Part of the IxAtmdAcc interface related to RX traffic
------------------------------------------------------ */
/**
*
* @ingroup IxAtmdAccAPI
*
* @brief Rx callback prototype
*
* IxAtmdAccRxVcRxCallback is the prototype of the Rx callback user
* function called once per PDU to pass a receive Pdu to a user on a
* partilcular connection. The callback is likely to push the mbufs
* to a protocol layer, and recycle the mbufs for a further use.
*
* @note -This function is called ONLY in the context of
* the @a ixAtmdAccRxDispatch() function
*
* @sa ixAtmdAccRxDispatch
* @sa ixAtmdAccRxVcConnect
*
* @param port @ref IxAtmLogicalPort [in] - the port on which this PDU was received
* a logical PHY port [@a IX_UTOPIA_PORT_0 .. @a IX_UTOPIA_MAX_PORTS - 1]
* @param userId @ref IxAtmdAccUserId [in] - user Id provided in the call
* to @a ixAtmdAccRxVcConnect()
* @param status @ref IxAtmdAccPduStatus [in] - an indication about the PDU validity.
* In the case of AAL0 the only possibile value is
* AAL0_VALID, in this case the client may optionally determine
* that an rx timeout occured by checking if the mbuf is
* compleletly or only partially filled, the later case
* indicating a timeout.
* In the case of OAM the only possible value is OAM valid.
* The status is set to @a IX_ATMDACC_MBUF_RETURN when
* the mbuf is released during a disconnect process.
* @param clp @ref IxAtmdAccClpStatus [in] - clp indication for this PDU.
* For AAL5/AAL0_48 this information
* is set if the clp bit of any rx cell is set
* For AAL0-52/OAM the client may inspect the CLP in individual
* cell headers in the PDU, and this parameter is set to 0.
* @param *mbufPtr @ref IX_OSAL_MBUF [in] - depending on the servive type a pointer to
* an mbuf (AAL5/AAL0/OAM) or mbuf chain (AAL5 only),
* that comprises the complete PDU data.
*
* This parameter is guaranteed not to be a null pointer.
*
*/
typedef void (*IxAtmdAccRxVcRxCallback) (IxAtmLogicalPort port,
IxAtmdAccUserId userId,
IxAtmdAccPduStatus status,
IxAtmdAccClpStatus clp,
IX_OSAL_MBUF * mbufPtr);
/**
*
* @ingroup IxAtmdAccAPI
*
* @brief Callback prototype for free buffer level is low.
*
* IxAtmdAccRxVcFreeLowCallback is the prototype of the user function
* which get called on a per-VC basis, when more mbufs are needed to
* continue the ATM data reception. This function is likely to supply
* more available mbufs by one or many calls to the replenish function
* @a ixAtmdAccRxVcFreeReplenish()
*
* This function is called when the number of available buffers for
* reception is going under the threshold level as defined
* in @a ixAtmdAccRxVcFreeLowCallbackRegister()
*
* This function is called inside an Qmgr dispatch context. No system
* resource or interrupt-unsafe feature should be used inside this
* callback.
*
* @sa ixAtmdAccRxVcFreeLowCallbackRegister
* @sa IxAtmdAccRxVcFreeLowCallback
* @sa ixAtmdAccRxVcFreeReplenish
* @sa ixAtmdAccRxVcFreeEntriesQuery
* @sa ixAtmdAccRxVcConnect
*
* @param userId @ref IxAtmdAccUserId [in] - user Id provided in the call
* to @a ixAtmdAccRxVcConnect()
*
* @return None
*
*/
typedef void (*IxAtmdAccRxVcFreeLowCallback) (IxAtmdAccUserId userId);
/* ------------------------------------------------------
Part of the IxAtmdAcc interface related to TX traffic
------------------------------------------------------ */
/**
*
* @ingroup IxAtmdAccAPI
*
* @brief Buffer callback prototype.
*
* This function is called to relinguish ownership of a transmitted
* buffer chain to the user.
*
* @note -In the case of a chained mbuf the AmtdAcc component can
* chain many user buffers together and pass ownership to the user in
* one function call.
*
* @param userId @ref IxAtmdAccUserId [in] - user If provided at registration of this
* callback.
* @param mbufPtr @ref IX_OSAL_MBUF [in] - a pointer to mbufs or chain of mbufs and is
* guaranteed not to be a null pointer.
*
*/
typedef void (*IxAtmdAccTxVcBufferReturnCallback) (IxAtmdAccUserId userId,
IX_OSAL_MBUF * mbufPtr);
/* ------------------------------------------------------
Part of the IxAtmdAcc interface related to Initialisation
------------------------------------------------------ */
/**
*
* @ingroup IxAtmdAccAPI
*
* @fn ixAtmdAccInit (void)
*
* @brief Initialise the IxAtmdAcc Component
*
* This function initialise the IxAtmdAcc component. This function shall
* be called before any other function of the API. Its role is to
* initialise all internal resources of the IxAtmdAcc component.
*
* The ixQmgr component needs to be initialized prior the use of
* @a ixAtmdAccInit()
*
* @param none
*
* Failing to initilialize the IxAtmdAcc API before any use of it will
* result in a failed status.
* If the specified component is not present, a success status will still be
* returned, however, a warning indicating the NPE to download to is not
* present will be issued.
*
* @return @li IX_SUCCESS initialisation is complete (in case of component not
* being present, a warning is clearly indicated)
* @return @li IX_FAIL unable to process this request either
* because this IxAtmdAcc is already initialised
* or some unspecified error has occrred.
*/
PUBLIC IX_STATUS ixAtmdAccInit (void);
/**
*
* @ingroup IxAtmdAccAPI
*
* @fn ixAtmdAccShow (void)
*
* @brief Show IxAtmdAcc configuration on a per port basis
*
* @param none
*
* @return none
*
* @note - Display use printf() and are redirected to stdout
*/
PUBLIC void
ixAtmdAccShow (void);
/**
*
* @ingroup IxAtmdAccAPI
*
* @fn ixAtmdAccStatsShow (void)
*
* @brief Show all IxAtmdAcc stats
*
* @param none
*
* @return none
*
* @note - Stats display use printf() and are redirected to stdout
*/
PUBLIC void
ixAtmdAccStatsShow (void);
/**
*
* @ingroup IxAtmdAccAPI
*
* @fn ixAtmdAccStatsReset (void)
*
* @brief Reset all IxAtmdAcc stats
*
* @param none
*
* @return none
*
*/
PUBLIC void
ixAtmdAccStatsReset (void);
/* ------------------------------------------------------
Part of the IxAtmdAcc interface related to RX traffic
------------------------------------------------------ */
/**
*
* @ingroup IxAtmdAccAPI
*
* @fn ixAtmdAccRxVcConnect (IxAtmLogicalPort port,
unsigned int vpi,
unsigned int vci,
IxAtmdAccAalType aalServiceType,
IxAtmRxQueueId rxQueueId,
IxAtmdAccUserId userCallbackId,
IxAtmdAccRxVcRxCallback rxCallback,
unsigned int minimumReplenishCount,
IxAtmConnId * connIdPtr,
IxAtmNpeRxVcId * npeVcIdPtr )
*
* @brief Connect to a Aal Pdu receive service for a particular
* port/vpi/vci, and service type.
*
* This function allows a user to connect to an Aal5/Aal0/OAM Pdu receive service
* for a particular port/vpi/vci. It registers the callback and allocates
* internal resources and a Connection Id to be used in further API calls
* related to this VCC.
*
* The function will setup VC receive service on the specified rx queue.
*
* This function is blocking and makes use internal locks, and hence
* should not be called from an interrupt context.
*
* On return from @a ixAtmdAccRxVcConnect() with a failure status, the
* connection Id parameter is unspecified. Its value cannot be used.
* A connId is the reference by which IxAtmdAcc refers to a
* connected VC. This identifier is the result of a succesful call
* to a connect function. This identifier is invalid after a
* sucessful call to a disconnect function.
*
* Calling this function for the same combination of Vpi, Vci and more
* than once without calling @a ixAtmdAccRxVcTryDisconnect() will result in a
* failure status.
*
* If this function returns success the user should supply receive
* buffers by calling @a ixAtmdAccRxVcFreeReplenish() and then call
* @a ixAtmdAccRxVcEnable() to begin receiving pdus.
*
* There is a choice of two receive Qs on which the VC pdus could be
* receive. The user must associate the VC with one of these. Essentially
* having two qs allows more flexible system configuration such as have
* high prioriy traffic on one q (e.g. voice) and low priority traffic on
* the other (e.g. data). The high priority Q could be serviced in
* preference to the low priority Q. One queue may be configured to be
* serviced as soon as there is traffic, the other queue may be configured
* to be serviced by a polling mechanism running at idle time.
*
* Two AAL0 services supporting 48 or 52 byte cell data are provided.
* Received AAL0 PDUs will be be a multiple of the cell data size (48/52).
* AAL0_52 is a raw cell service and includes an ATM cell header
* (excluding HEC) at the start of each cell.
*
* A single "OAM Rx channel" for all ports may be enabled by
* establishing a dedicated OAM Rx connection.
*
* The OAM service allows buffers containing 52 byte OAM F4/F5 cells
* to be transmitted and received over the dedicated OAM channels.
* HEC is appended/removed, and CRC-10 performed by the NPE. The OAM
* service offered by AtmdAcc is a raw cell transport service.
* It is assumed that ITU I.610 procedures that make use of this
* service are implemented above AtmdAcc.
*
* Note that the dedicated OAM connections are established on
* reserved VPI,VCI, and (in the case of Rx) port values.
* These values are used purely to descriminate the dedicated OAM channels
* and do not identify a particular OAM F4/F5 flow. F4/F5 flows may be
* realised for particluar VPI/VCIs by manipulating the VPI,VCI
* fields of the ATM cell headers of cells in the buffers passed
* to AtmdAcc.
*
* Calling this function prior to enable the port will fail.
*
* @sa ixAtmdAccRxDispatch
* @sa ixAtmdAccRxVcEnable
* @sa ixAtmdAccRxVcDisable
* @sa ixAtmdAccRxVcTryDisconnect
* @sa ixAtmdAccPortEnable
*
* @param port @ref IxAtmLogicalPort [in] - VC identification : logical PHY port
* [@a IX_UTOPIA_PORT_0 .. @a IX_UTOPIA_MAX_PORTS - 1]
* @param vpi unsigned int [in] - VC identification : ATM Vpi [0..255] or IX_ATMDACC_OAM_VPI
* @param vci unsigned int [in] - VC identification : ATM Vci [0..65535] or IX_ATMDACC_OAM_VCI
* @param aalServiceType @ref IxAtmdAccAalType [in] - type of service: AAL5, AAL0_48, AAL0_52, or OAM
* @param rxQueueId @ref IxAtmRxQueueId [in] - this identifieds which of two Qs the VC
* should use.when icoming traffic is processed
* @param userCallbackId @ref IxAtmdAccUserId [in] - user Id used later as a parameter to
* the supplied rxCallback.
* @param rxCallback [in] @ref IxAtmdAccRxVxRxCallback - function called when mbufs are received.
* This parameter cannot be a null pointer.
* @param bufferFreeCallback [in] - function to be called to return
* ownership of buffers to IxAtmdAcc user.
* @param minimumReplenishCount unsigned int [in] - For AAL5/AAL0 the number of free mbufs
* to be used with this channel. Use a high number when the expected traffic
* rate on this channel is high, or when the user's mbufs are small, or when
* the RxVcFreeLow Notification has to be invoked less often. When this
* value is IX_ATMDACC_DEFAULT_REPLENISH_COUNT, the minimum of
* resources will be used. Depending on traffic rate, pdu
* size and mbuf size, rxfree queue size, polling/interrupt rate, this value may
* require to be replaced by a different value in the range 1-128
* For OAM the rxFree queue size is fixed by atmdAcc and this parameter is ignored.
* @param connIdPtr @ref IxAtmConnId [out] - pointer to a connection Id
* This parameter cannot be a null pointer.
* @param npeVcIdPtr @ref IxAtmNpeRxVcId [out] - pointer to an npe Vc Id
* This parameter cannot be a null pointer.
*
* @return @li IX_SUCCESS successful call to IxAtmdAccRxVcConnect
* @return @li IX_ATMDACC_BUSY cannot process this request :
* no VC is available
* @return @li IX_FAIL
* parameter error,
* VC already in use,
* attempt to connect AAL service on reserved OAM VPI/VCI,
* attempt to connect OAM service on VPI/VCI other than the reserved OAM VPI/VCI,
* port is not initialised,
* or some other error occurs during processing.
*
*/
PUBLIC IX_STATUS ixAtmdAccRxVcConnect (IxAtmLogicalPort port,
unsigned int vpi,
unsigned int vci,
IxAtmdAccAalType aalServiceType,
IxAtmRxQueueId rxQueueId,
IxAtmdAccUserId userCallbackId,
IxAtmdAccRxVcRxCallback rxCallback,
unsigned int minimumReplenishCount,
IxAtmConnId * connIdPtr,
IxAtmNpeRxVcId * npeVcIdPtr );
/**
*
* @ingroup IxAtmdAccAPI
*
* @fn ixAtmdAccRxVcFreeReplenish (IxAtmConnId connId,
IX_OSAL_MBUF * mbufPtr)
*
* @brief Provide free mbufs for data reception on a connection.
*
* This function provides mbufs for data reception by the hardware. This
* function needs to be called by the user on a regular basis to ensure
* no packet loss. Providing free buffers is a connection-based feature;
* each connection can have different requirements in terms of buffer size
* number of buffers, recycling rate. This function could be invoked from
* within the context of a @a IxAtmdAccRxVcFreeLowCallback() callback
* for a particular VC
*
* Mbufs provided through this function call can be chained. They will be
* unchained internally. A call to this function with chained mbufs or
* multiple calls with unchained mbufs are equivalent, but calls with
* unchained mbufs are more efficients.
*
* Mbufs provided to this interface need to be able to hold at least one
* full cell payload (48/52 bytes, depending on service type).
* Chained buffers with a size less than the size supported by the hardware
* will be returned through the rx callback provided during the connect step.
*
* Failing to invoke this function prior to enabling the RX traffic
* can result in packet loss.
*
* This function is not reentrant for the same connId.
*
* This function does not use system resources and can be
* invoked from an interrupt context.
*
* @note - Over replenish is detected, and extra mbufs are returned through
* the rx callback provided during the connect step.
*
* @note - Mbuf provided to the replenish function should have a length greater or
* equal to 48/52 bytes according to service type.
*
* @note - The memory cache of mMbuf payload should be invalidated prior to Mbuf
* submission. Flushing the Mbuf headers is handled by IxAtmdAcc.
*
* @note - When a chained mbuf is provided, this function process the mbufs
* up to the hardware limit and invokes the user-supplied callback
* to release extra buffers.
*
* @sa ixAtmdAccRxVcFreeLowCallbackRegister
* @sa IxAtmdAccRxVcFreeLowCallback
* @sa ixAtmdAccRxVcConnect
*
* @param connId @ref IxAtmConnId [in] - connection Id as returned from a succesfull call to
* @a IxAtmdAccRxVcConnect()
* @param mbufPtr @ref IX_OSAL_MBUF [in] - pointer to a mbuf structure to be used for data
* reception. The mbuf pointed to by this parameter can be chained
* to an other mbuf.
*
* @return @li IX_SUCCESS successful call to @a ixAtmdAccRxVcFreeReplenish()
* and the mbuf is now ready to use for incoming traffic.
* @return @li IX_ATMDACC_BUSY cannot process this request because
* the max number of outstanding free buffers has been reached
* or the internal resources have exhausted for this VC.
* The user is responsible for retrying this request later.
* @return @li IX_FAIL cannot process this request because of parameter
* errors or some unspecified internal error has occurred.
*
* @note - It is not always guaranteed the replenish step to be as fast as the
* hardware is consuming Rx Free mbufs. There is nothing in IxAtmdAcc to
* guarantee that replenish reaches the rxFree threshold level. If the
* threshold level is not reached, the next rxFree low notification for
* this channel will not be triggered.
* The preferred ways to replenish can be as follows (depending on
* applications and implementations) :
* @li Replenish in a rxFree low notification until the function
* ixAtmdAccRxVcFreeReplenish() returns IX_ATMDACC_BUSY
* @li Query the queue level using @sa ixAtmdAccRxVcFreeEntriesQuery, then
* , replenish using @a ixAtmdAccRxVcFreeReplenish(), then query the queue
* level again, and replenish if the threshold is still not reached.
* @li Trigger replenish from an other event source and use rxFree starvation
* to throttle the Rx traffic.
*
*/
PUBLIC IX_STATUS ixAtmdAccRxVcFreeReplenish (IxAtmConnId connId,
IX_OSAL_MBUF * mbufPtr);
/**
*
* @ingroup IxAtmdAccAPI
*
* @fn ixAtmdAccRxVcFreeLowCallbackRegister (IxAtmConnId connId,
unsigned int numberOfMbufs,
IxAtmdAccRxVcFreeLowCallback callback)
*
* @brief Configure the RX Free threshold value and register a callback
* to handle threshold notifications.
*
* The function ixAtmdAccRxVcFreeLowCallbackRegister sets the threshold value for
* a particular RX VC. When the number of buffers reaches this threshold
* the callback is invoked.
*
* This function should be called once per VC before RX traffic is
* enabled.This function will fail if the curent level of the free buffers
* is equal or less than the threshold value.
*
* @sa ixAtmdAccRxVcFreeLowCallbackRegister
* @sa IxAtmdAccRxVcFreeLowCallback
* @sa ixAtmdAccRxVcFreeReplenish
* @sa ixAtmdAccRxVcFreeEntriesQuery
* @sa ixAtmdAccRxVcConnect
*
* @param connId @ref IxAtmConnId [in] - connection Id as resulted from a succesfull call
* to @a IxAtmdAccRxVcConnect()
* @param numberOfMbufs unsigned int [in] - threshold number of buffers. This number
* has to be a power of 2, one of the values 0,1,2,4,8,16,32....
* The maximum value cannot be more than half of the rxFree queue
* size (which can be retrieved using @a ixAtmdAccRxVcFreeEntriesQuery()
* before any use of the @a ixAtmdAccRxVcFreeReplenish() function)
* @param callback @ref IxAtmdAccRxVcFreeLowCallback [in] - function telling the user that the number of
* free buffers has reduced to the threshold value.
*
* @return @li IX_SUCCESS Threshold set successfully.
* @return @li IX_FAIL parameter error or the current number of free buffers
* is less than or equal to the threshold supplied or some
* unspecified error has occrred.
*
* @note - the callback will be called when the threshold level will drop from
* exactly (numberOfMbufs + 1) to (numberOfMbufs).
*
*/
PUBLIC IX_STATUS ixAtmdAccRxVcFreeLowCallbackRegister (IxAtmConnId connId,
unsigned int numberOfMbufs,
IxAtmdAccRxVcFreeLowCallback callback);
/**
*
* @ingroup IxAtmdAccAPI
*
* @fn ixAtmdAccRxVcFreeEntriesQuery (IxAtmConnId connId,
unsigned int *numberOfMbufsPtr)
*
* @brief Get the number of rx mbufs the system can accept to replenish the
* the rx reception mechanism on a particular channel
*
* The ixAtmdAccRxVcFreeEntriesQuery function is used to retrieve the current
* number of available mbuf entries for reception, on a per-VC basis. This
* function can be used to know the number of mbufs which can be provided
* using @a ixAtmdAccRxVcFreeReplenish().
*
* This function can be used from a timer context, or can be associated
* with a threshold event, or can be used inside an active polling
* mechanism which is under user control.
*
* This function is reentrant and does not use system resources and can
* be invoked from an interrupt context.
*
* @param connId @ref IxAtmConnId [in] - connection Id as resulted from a succesfull call
* to @a IxAtmdAccRxVcConnect()
* @param numberOfMbufsPtr unsigned int [out] - Pointer to the number of available entries.
* . This parameter cannot be a null pointer.
*
* @return @li IX_SUCCESS the current number of mbufs not yet used for incoming traffic
* @return @li IX_FAIL invalid parameter
*
* @sa ixAtmdAccRxVcFreeReplenish
*
*/
PUBLIC IX_STATUS ixAtmdAccRxVcFreeEntriesQuery (IxAtmConnId connId,
unsigned int *numberOfMbufsPtr);
/**
*
* @ingroup IxAtmdAccAPI
*
* @fn ixAtmdAccRxVcEnable (IxAtmConnId connId)
*
* @brief Start the RX service on a VC.
*
* This functions kicks-off the traffic reception for a particular VC.
* Once invoked, incoming PDUs will be made available by the hardware
* and are eventually directed to the @a IxAtmdAccRxVcRxCallback() callback
* registered for the connection.
*
* If the traffic is already running, this function returns IX_SUCCESS.
* This function can be invoked many times.
*
* IxAtmdAccRxVcFreeLowCallback event will occur only after
* @a ixAtmdAccRxVcEnable() function is invoked.
*
* Before using this function, the @a ixAtmdAccRxVcFreeReplenish() function
* has to be used to replenish the RX Free queue. If not, incoming traffic
* may be discarded.and in the case of interrupt driven reception the
* @a IxAtmdAccRxVcFreeLowCallback() callback may be invoked as a side effect
* during a replenish action.
*
* This function is not reentrant and should not be used inside an
* interrupt context.
*
* For an VC connection this function can be called after a call to
* @a ixAtmdAccRxVcDisable() and should not be called after
* @a ixAtmdAccRxVcTryDisconnect()
*
* @sa ixAtmdAccRxVcDisable
* @sa ixAtmdAccRxVcConnect
* @sa ixAtmdAccRxVcFreeReplenish
*
* @param connId @ref IxAtmConnId [in] - connection Id as resulted from a succesfull call
* to @a IxAtmdAccRxVcConnect()
*
* @return @li IX_SUCCESS successful call to ixAtmdAccRxVcEnable
* @return @li IX_ATMDACC_WARNING the channel is already enabled
* @return @li IX_FAIL invalid parameters or some unspecified internal
* error occured.
*
*/
PUBLIC IX_STATUS ixAtmdAccRxVcEnable (IxAtmConnId connId);
/**
*
* @ingroup IxAtmdAccAPI
*
* @fn ixAtmdAccRxVcDisable (IxAtmConnId connId)
*
* @brief Stop the RX service on a VC.
*
* This functions stops the traffic reception for a particular VC connection.
*
* Once invoked, incoming Pdus are discarded by the hardware. Any Pdus
* pending will be freed to the user
*
* Hence once this function returns no more receive callbacks will be
* called for that VC. However, buffer free callbacks will be invoked
* until such time as all buffers supplied by the user have been freed
* back to the user
*
* Calling this function doe not invalidate the connId.
* @a ixAtmdAccRxVcEnable() can be invoked to enable Pdu reception again.
*
* If the traffic is already stopped, this function returns IX_SUCCESS.
*
* This function is not reentrant and should not be used inside an
* interrupt context.
*
* @sa ixAtmdAccRxVcConnect
* @sa ixAtmdAccRxVcEnable
* @sa ixAtmdAccRxVcDisable
*
* @param connId @ref IxAtmConnId [in] - connection Id as resulted from a succesfull call to @a
* IxAtmdAccRxVcConnect()
*
* @return @li IX_SUCCESS successful call to @a ixAtmdAccRxVcDisable().
* @return @li IX_ATMDACC_WARNING the channel is already disabled
* @return @li IX_FAIL invalid parameters or some unspecified internal error occured
*
*/
PUBLIC IX_STATUS ixAtmdAccRxVcDisable (IxAtmConnId connId);
/**
*
* @ingroup IxAtmdAccAPI
*
* @fn ixAtmdAccRxVcTryDisconnect (IxAtmConnId connId)
*
* @brief Disconnect a VC from the RX service.
*
* This function deregisters the VC and guarantees that all resources
* associated with this VC are free. After its execution, the connection
* Id is not available.
*
* This function will fail until such time as all resources allocated to
* the VC connection have been freed. The user is responsible to delay and
* call again this function many times until a success status is returned.
*
* This function needs internal locks and should not be called from an
* interrupt context
*
* @param connId @ref IxAtmConnId [in] - connection Id as resulted from a succesfull call to
* @a IxAtmdAccRxVcConnect()
*
* @return @li IX_SUCCESS successful call to ixAtmdAccRxVcDisable
* @return @li IX_ATMDACC_RESOURCES_STILL_ALLOCATED not all resources
* associated with the connection have been freed.
* @return @li IX_FAIL cannot process this request because of a parameter
* error
*
*/
PUBLIC IX_STATUS ixAtmdAccRxVcTryDisconnect (IxAtmConnId connId);
/* ------------------------------------------------------
Part of the IxAtmdAcc interface related to TX traffic
------------------------------------------------------ */
/**
*
* @ingroup IxAtmdAccAPI
*
* @fn ixAtmdAccTxVcConnect (IxAtmLogicalPort port,
unsigned int vpi,
unsigned int vci,
IxAtmdAccAalType aalServiceType,
IxAtmdAccUserId userId,
IxAtmdAccTxVcBufferReturnCallback bufferFreeCallback,
IxAtmConnId * connIdPtr)
*
* @brief Connect to a Aal Pdu transmit service for a particular
* port/vpi/vci and service type.
*
* This function allows a user to connect to an Aal5/Aal0/OAM Pdu transmit service
* for a particular port/vpi/vci. It registers the callback and allocates
* internal resources and a Connection Id to be used in further API calls
* related to this VC.
*
* The function will setup VC transmit service on the specified on the
* specified port. A connId is the reference by which IxAtmdAcc refers to a
* connected VC. This identifier is the result of a succesful call
* to a connect function. This identifier is invalid after a
* sucessful call to a disconnect function.
*
* This function needs internal locks, and hence should not be called
* from an interrupt context.
*
* On return from @a ixAtmdAccTxVcConnect() with a failure status, the
* connection Id parameter is unspecified. Its value cannot be used.
*
* Calling this function for the same combination of port, Vpi, Vci and
* more than once without calling @a ixAtmdAccTxVcTryDisconnect() will result
* in a failure status.
*
* Two AAL0 services supporting 48 or 52 byte cell data are provided.
* Submitted AAL0 PDUs must be a multiple of the cell data size (48/52).
* AAL0_52 is a raw cell service the client must format
* the PDU with an ATM cell header (excluding HEC) at the start of
* each cell, note that AtmdAcc does not validate the cell headers in
* a submitted PDU.
*
* For the OAM service an "OAM Tx channel" may be enabled for a port
* by establishing a single dedicated OAM Tx connection on that port.
*
* The OAM service allows buffers containing 52 byte OAM F4/F5 cells
* to be transmitted and received over the dedicated OAM channels.
* HEC is appended/removed, and CRC-10 performed by the NPE. The OAM
* service offered by AtmdAcc is a raw cell transport service.
* It is assumed that ITU I.610 procedures that make use of this
* service are implemented above AtmdAcc.
*
* Note that the dedicated OAM connections are established on
* reserved VPI,VCI, and (in the case of Rx) port values.
* These values are used purely to descriminate the dedicated OAM channels
* and do not identify a particular OAM F4/F5 flow. F4/F5 flows may be
* realised for particluar VPI/VCIs by manipulating the VPI,VCI
* fields of the ATM cell headers of cells in the buffers passed
* to AtmdAcc.
*
* Calling this function before enabling the port will fail.
*
* @sa ixAtmdAccTxVcTryDisconnect
* @sa ixAtmdAccPortTxScheduledModeEnable
* @sa ixAtmdAccPortEnable
*
* @param port @ref IxAtmLogicalPort [in] - VC identification : logical PHY port
* [@a IX_UTOPIA_PORT_0 .. @a IX_UTOPIA_MAX_PORTS - 1]
* @param vpi unsigned int [in] - VC identification : ATM Vpi [0..255] or IX_ATMDACC_OAM_VPI
* @param vci unsigned int [in] - VC identification : ATM Vci [0..65535] or IX_ATMDACC_OAM_VCI
* @param aalServiceType @ref IxAtmdAccAalType [in] - type of service AAL5, AAL0_48, AAL0_52, or OAM
* @param userId @ref IxAtmdAccUserId [in] - user id to be used later during callbacks related
* to this channel
* @param bufferFreeCallback @ref IxAtmdAccTxVcBufferReturnCallback [in] - function called when mbufs
* transmission is complete. This parameter cannot be a null
* pointer.
* @param connIdPtr @ref IxAtmConnId [out] - Pointer to a connection Id.
* This parameter cannot be a null pointer.
*
* @return @li IX_SUCCESS successful call to @a IxAtmdAccRxVcConnect().
* @return @li IX_ATMDACC_BUSY cannot process this request
* because no VC is available
* @return @li IX_FAIL
* parameter error,
* VC already in use,
* attempt to connect AAL service on reserved OAM VPI/VCI,
* attempt to connect OAM service on VPI/VCI other than the reserved OAM VPI/VCI,
* port is not initialised,
* or some other error occurs during processing.
*
* @note - Unscheduled mode is not supported in ixp425 1.0. Therefore, the
* function @a ixAtmdAccPortTxScheduledModeEnable() need to be called
* for this port before any establishing a Tx Connection
*/
PUBLIC IX_STATUS ixAtmdAccTxVcConnect (IxAtmLogicalPort port,
unsigned int vpi,
unsigned int vci,
IxAtmdAccAalType aalServiceType,
IxAtmdAccUserId userId,
IxAtmdAccTxVcBufferReturnCallback bufferFreeCallback,
IxAtmConnId * connIdPtr);
/**
*
* @ingroup IxAtmdAccAPI
*
* @fn ixAtmdAccTxVcPduSubmit (IxAtmConnId connId,
IX_OSAL_MBUF * mbufPtr,
IxAtmdAccClpStatus clp,
unsigned int numberOfCells)
*
* @brief Submit a Pdu for transmission on connection.
*
* A data user calls this function to submit an mbufs containing a Pdu
* to be transmitted. The buffer supplied can be chained and the Pdu it
* contains must be complete.
*
* The transmission behavior of this call depends on the operational mode
* of the port on which the connection is made.
*
* In unscheduled mode the mbuf will be submitted to the hardware
* immediately if sufficent resource is available. Otherwise the function
* will return failure.
*
* In scheduled mode the buffer is queued internally in IxAtmdAcc. The cell
* demand is made known to the traffic shaping entity. Cells from the
* buffers are MUXed onto the port some time later as dictated by the
* traffic shaping entity. The traffic shaping entity does this by sending
* transmit schedules to IxAtmdAcc via @a ixAtmdAccPortTxProcess() function call.
*
* Note that the dedicated OAM channel is scheduled just like any
* other channel. This means that any OAM traffic relating to an
* active AAL0/AAL5 connection will be scheduled independantly of the
* AAL0/AAL5 traffic for that connection.
*
* When transmission is complete, the TX Done mechanism will give the
* owmnership of these buffers back to the customer. The tx done mechanism
* must be in operation before transmission is attempted.
*
* For AAL0/OAM submitted AAL0 PDUs must be a multiple of the cell data
* size (48/52). AAL0_52 and OAM are raw cell services, and the client
* must format the PDU with an ATM cell header (excluding HEC) at the
* start of each cell, note that AtmdAcc does not validate the cell headers in
* a submitted PDU.
*
*
* @sa IxAtmdAccTxVcBufferReturnCallback
* @sa ixAtmdAccTxDoneDispatch
*
* @param connId @ref IxAtmConnId [in] - connection Id as resulted from a succesfull call to
* @a ixAtmdAccTxVcConnect()
* @param mbufPtr @ref IX_OSAL_MBUF [in] - pointer to a chained structure of mbufs to transmit.
* This parameter cannot be a null pointer.
* @param clp @ref IxAtmdAccClpStatus [in] - clp indication for this PDU. All cells of this pdu
* will be sent with the clp bit set
* @param numberOfCells unsigned int [in] - number of cells in the PDU.
*
* @return @li IX_SUCCESS successful call to @a ixAtmdAccTxVcPduSubmit()
* The pdu pointed by the mbufPtr parameter will be
* transmitted
* @return @li IX_ATMDACC_BUSY unable to process this request because
* internal resources are all used. The caller is responsible
* for retrying this request later.
* @return @li IX_FAIL unable to process this request because of error
* in the parameters (wrong connId supplied,
* or wrong mbuf pointer supplied), the total length of all buffers
* in the chain should be a multiple of the cell size
* ( 48/52 depending on the service type ),
* or unspecified error during processing
*
* @note - This function in not re-entrant for the same VC (e.g. : two
* thread cannot send PDUs for the same VC). But two threads can
* safely call this function with a different connection Id
*
* @note - In unscheduled mode, this function is not re-entrant on a per
* port basis. The size of pdus is limited to 8Kb.
*
* @note - 0-length mbufs should be removed from the chain before submission.
* The total length of the pdu (sdu + padding +trailer) has to be
* updated in the header of the first mbuf of a chain of mbufs.
*
* @note - Aal5 trailer information (UUI, CPI, SDU length) has to be supplied
* before submission.
*
* @note - The payload memory cache should be flushed, if needed, prior to
* transmission. Mbuf headers are flushed by IxAtmdAcc
*
* @note - This function does not use system resources and can be used
* inside an interrupt context
*/
PUBLIC IX_STATUS ixAtmdAccTxVcPduSubmit (IxAtmConnId connId,
IX_OSAL_MBUF * mbufPtr,
IxAtmdAccClpStatus clp,
unsigned int numberOfCells);
/**
*
* @ingroup IxAtmdAccAPI
*
* @fn ixAtmdAccTxVcTryDisconnect (IxAtmConnId connId)
*
* @brief Disconnect from a Aal Pdu transmit service for a particular
* port/vpi/vci.
*
* This function deregisters the VC and guarantees that all resources
* associated with this VC are free. After its execution, the connection
* Id is not available.
*
* This function will fail until such time as all resources allocated to
* the VC connection have been freed. The user is responsible to delay
* and call again this function many times until a success status is
* returned.
*
* After its execution, the connection Id is not available.
*
* @param connId @ref IxAtmConnId [in] - connection Id as resulted from a succesfull call to
* @a ixAtmdAccTxVcConnect()
*
* @return @li IX_SUCCESS successful call to @a ixAtmdAccTxVcTryDisconnect()
* @return @li IX_ATMDACC_RESOURCES_STILL_ALLOCATED not all resources
* associated with the connection have been freed. This condition will
* disappear after Tx and TxDone is complete for this channel.
* @return @li IX_FAIL unable to process this request because of errors
* in the parameters (wrong connId supplied)
*
* @note - This function needs internal locks and should not be called
* from an interrupt context
*
* @note - If the @a IX_ATMDACC_RESOURCES_STILL_ALLOCATED error does not
* clear after a while, this may be linked to a previous problem
* of cell overscheduling. Diabling the port and retry a disconnect
* will free the resources associated with this channel.
*
* @sa ixAtmdAccPortTxProcess
*
*/
PUBLIC IX_STATUS ixAtmdAccTxVcTryDisconnect (IxAtmConnId connId);
#endif /* IXATMDACC_H */
/**
* @} defgroup IxAtmdAccAPI
*/