IDT CPS-1848, User Manual

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2. RapidIO Ports > Packet Transfer Validation and Debug
CPS-1848 User Manual 65 June 2, 2014
Formal Status This document is confidential and is subject to an NDA.
Integrated Device Technology
2.11.4 Switch Is Not Routing Packets Correctly
If some packets are routed correctly, and some are dropped, check for the isolation events described in Event Isolation . To
ensure that routing tables are being programmed as expected, check the registers in Table 17 .
For Revision A/B, if maintenance packets are not routed correctly, enable all events in the Logical/Transport Layer Error
Enable CSR and check that no events are seen in the Logical/Transport Layer Error Detect CSR . Debug the cause of any
events seen.
For Revision C, if maintenance packets with a hop count equal to 0 are not routed correctly, enable all events in the
Logical/Transport Layer Error Enable CSR and check that no events are seen in the Logical/Transport Layer Error Detect CSR .
Debug the cause of any events seen.
If trace functionality is active on any port, packets may be sent to the trace port unexpectedly. To determine where traced
packets will be sent, and whether non-traced traffic may be sent on the trace port, check the TRACE_OUT_PORT_MODE,
TRACE_OUT_PORT, and TRACE_EN fields in the
Device Control 1 Register . To determine which ports have trace
functionality enabled and what packets will be traced, check the TRACE_x_EN bits in the Port {0..17} Operations Register .
If filter functionality is active on any port, packets may be dropped unexpectedly. To determine which ports have filter
functionality enabled, and which packets will be dropped, check the FILTER_x_EN bits in the
Port {0..17} Operations Register .
If the registers in Table 17 are set correctly, then each route must be verified individually (for more information, see Packet
Routing ).
Table 17: Packet Counters and Configuration Issues – Switch Is Not Routing Packets Correctly
Packet Counter Register Description Implication
Route Port Select Register This register determines which port the
Standard Route Table Entries Configuration
destID Select CSR
and Standard Route Table
Entry Configuration Port Select CSR are
applied to.
If this register is set incorrectly, routing table
changes using the standard registers will be
applied to the incorrect port (for more
information, see
Packet Routing ).
Multicast Route Select Register This register determines which port the
Multicast Mask Port CSR , Multicast
Association Selection CSR and Multicast
Association Operations CSR are applied to.
If this register is set incorrectly, multicast
routing changes using the standard registers
will be applied to the incorrect port (for more
information, see
Packet Routing ).
RapidIO Domain Register This register overrides Domain routing table
entry, and determines which 16-bit device IDs
are routed using the Device routing table. If this register is set incorrectly, packets with
16-bit device IDs may be unexpectedly routed
using the Device routing table (for more
information, see
Packet Routing ).
Port {0..17} Operations Register The SELF_MCAST_EN bit causes multicast
packets to be sent back to the port they were
received on, if that port is part of the multicast
mask. If SELF_MCAST_EN is set incorrectly,
multicast packets may be unexpectedly
received by the device that originated them
(for more information, see
Packet Routing ).