PCI-X Interface
of reordering allowed. Retry is not considered an error condition, so there is no error logging or reporting done on a retry.
•The 41210 terminates a transaction with retry to an initiator when one of the following conditions is met:
—The 41210 receives a new memory read transaction, and the 41210 delayed transaction queue is full.
—The 41210 receives a memory read that has already been queued, but has not completed on PCI Express*.
—The 41210 receives a memory read that has been queued and completed on PCI Express*, but ordering rules require a downstream posted write to complete ahead of it.
—A LOCK transaction has been established from PCI
—The 41210 receives a memory write transaction, and the 41210 has no free buffer space to accept the write.
—A memory write transaction is from a master other than the master that was previously retried (starvation prevention mechanism).
•The 41210 disconnects an initiator when one of the following conditions is met:
—The 41210 cannot accept any more write data.
—The 41210 has no more read data to deliver.
—The memory address is
—The inverse decode window ends.
•The 41210 returns a target abort to PCI when the following condition is met.
—The cycle master aborted, or the target aborted on PCI Express*/peer PCI.
Intel® 41210 Serial to Parallel PCI Bridge Developer’s Manual | 31 |
