Mtp3InitLinkCfg

Note: There is a single transmit queue for delivery to the next lower layer (MTP 2). This queue will build up if the application is sending faster than MTP 2 can transmit data over the link. The pxQlen fields represent the queue length thresholds at which the internal transmit congestion priority is raised to the next level. For example, the default for p1Qlen is 32. This means that when the transmit queue size reaches 32 messages, the internal transmit congestion priority is raised from 0 to 1. 0 is the lowest priority, 3 is the highest. The congestion priority in combination with the discard priority (discPrior field) is used to determine what to do with new messages from an application when the stack is backed up. If a new message has a priority less than the congestion priority and less than the discard priority, the message is discarded. Otherwise MTP 3 attempts to queue the message for transmission to MTP 2 (assuming buffer space exists). Therefore a discard priority of 0 means that all messages will attempt to be queued regardless of the internal congestion priority. Refer to Section 2.3.4, Congestion Priorities, for further information.

typedef struct _Mtp3SetLinkCfg
{
  U16              lnkSetId;            /* Link set number link belongs 
                                         * to                          */
  U32              adjDpc;              /* Adjacent Destination Point
                                         * Code                        */
  U8               lnkPrior;            /* Link priority within the link 
                                         * set                         */
  U8               spare1;              /* Alignment                   */
  U16              msgSize;             /* Message length              */
  U8               msgPrior;            /* Management message priority */
  U8               lnkType;             /* Link type                   */
  U8               maxSLTtry;           /* Maximum times to retry SLTM */
  U8               spare2;              /* Alignment                   */
  S16              p0QLen;              /* Queue threshold where cong.
                                         * prior is increased to 0     */
  S16              p1QLen;              /* Queue threshold where cong. 
                                         * prior is increased to 1     */
  S16              p2QLen;              /* Queue threshold where cong. 
                                         * prior is increased to 2     */
  S16              p3QLen;              /* Queue threshold where cong.
                                         * prior is increased to 3     */
  U8                discPrior;          /* Discard priority            */
  U8                maxCredit;          /* Max credit                  */
  U16               lnkId;              /* Changeback link id          */
  U8                lnkTstSLC;          /* Link selection code for link 
                                         * test                        */
  U8                tstLen;             /* Link test pattern length    */
  U8                tst[MTP3LNKTSTMAX]; /* Link test pattern           */
  U8                ssf;                /* Sub service field           */
  Mtp3DLSapTimerCfg tmr;                /* Timer configuration         */
  U16               dstProcId;          /* Destination processor id    */
  U8                dstEnt;             /* Destination entity          */
  U8                dstInst;            /* Destination instance        */
  U8                prior;              /* Priority. Unused            */
  U8                route;              /* Route. Unused               */
  U8                selector;           /* Lower layer selector. 
                                         * Internal use only.          */
  U8                spare3;             /* Alignment                   */
  MemoryId          mem;                /* Memory region and pool id.
                                         * Unused                      */
  U8                dpcLen;             /* DPC or OPC length           */
  U8                spare4;             /* Alignment                   */
  S16               spId;               /* Service provider id         */
  U32               myOpc;              /* My OPC for Adjacent DPCs    */
  U8                dis;                /* Initial link state          */
  U8                portType;           /* Port type                   */
} MTP3LinkCfg;

typedef struct _Mtp3LinkTimerCfg
{
  TimerCfg t1;  /* Delay to avoid mis-sequencing on changeover     */
  TimerCfg t2;  /* Waiting for changeover ack                      */
  TimerCfg t3;  /* Delay to avoid mis-sequencing on changeback     */
  TimerCfg t4;  /* Waiting for first changeback ack                */
  TimerCfg t5;  /* Waiting for second changeback ack               */
  TimerCfg t6;  /* Delay to avoid mis-sequencing on rerouting      */
  TimerCfg t7;  /* Waiting for link connection ack                 */
  TimerCfg t11; /* Transfer restricted timer                       */
  TimerCfg t12; /* Waiting for uninhibit ack                       */
  TimerCfg t13; /* Waiting for forced uninhibit                    */
  TimerCfg t14; /* Waiting for inhibition ack                      */
  TimerCfg t17; /* Delay to avoid oscillation of initial alignment 
                 * failure                                         */
  TimerCfg t22; /* Local inhibit test timer                        */
  TimerCfg t23; /* Remote inhibit test timer                       */
  TimerCfg t24; /* Stabilizing timer                               */
  TimerCfg t31; /* BSN requested timer                             */
  TimerCfg t32; /* SLT timer                                       */
  TimerCfg t33; /* Connecting timer                                */
  TimerCfg t34; /* Periodic signaling link test timer              */
} MTP3LinkTimerCfg;