72 Intel® 41210 Serial to Parallel PCI Bridge Developer’s Manual

Error Handling

11.2.2.3 Split Termination on PCI Express* Interface

Table 3 1 shows the split-completion errors received on the PCI Express* interface and how they

translate to PCI-X.

§ §

Table 31. Completion-Status Translation for PCI Express* Split-Completion Terminations

PCI Express* Completion Status PCI Completion
Successful (SC) Successful
Unsupported Request (UR)
MAM = 1
Memory reads: PCI target abort1
I/O reads: PCI target abort
I/O writes: PCI target abort
MAM = 0
Memory reads: PCI return all Fs
I/O reads: PCI return all Fs
I/O writes: Normal completion
PCI-X split master
abort2
Completer Abort (CA) PCI target abort1
PCI-X split target abort1
NOTES:
1. Data is returned to the point of error, and then a target abort is signaled.
2. The 41210 Bridge issues a split-completion error message and either master aborts or target aborts the
remaining completion sequence when an abort is detected on the PCI Express*/peer interface. If several
bytes of data return successfully for the request, the data is returned to the point of error (rounded to the
nearest ADB), and then the split-completion error message is generated.