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Diffstat (limited to 'drivers/net/npe/include/IxAtmdAcc.h')
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diff --git a/drivers/net/npe/include/IxAtmdAcc.h b/drivers/net/npe/include/IxAtmdAcc.h new file mode 100644 index 0000000000..ae7b2434c3 --- /dev/null +++ b/drivers/net/npe/include/IxAtmdAcc.h @@ -0,0 +1,1194 @@ + +/** + * @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 + */ + + |
