When LX2 PCIe controller is sending multiple split completions and
ACK latency expires indicating that ACK should be send at priority.
But because of large number of split completions and FC update DLLP,
the controller does not give priority to ACK transmission. This
results into ACK latency timer timeout error at the link partner and
the pending TLPs are replayed by the link partner again.
Workaround:
1. Reduce the ACK latency timeout value to a very small value.
2. Restrict the number of completions from the LX2 PCIe controller
to 1, by changing the Max Read Request Size (MRRS) of link partner
to the same value as Max Packet size (MPS).
This patch implemented part 1, the part 2 can be set by kernel parameter
'pci=pcie_bus_perf'
This ERRATA is only for LX2160A Rev1.0, and it will be fixed
in Rev2.0.
Signed-off-by: Hou Zhiqiang <Zhiqiang.Hou@nxp.com>
PCIe configuration access to non-existent function triggered
SERROR interrupt exception.
Workaround:
Disable error reporting on AXI bus during the Vendor ID read
transactions in enumeration.
This ERRATA is only for LX2160A Rev1.0, and it will be fixed
in Rev2.0.
Signed-off-by: Hou Zhiqiang <Zhiqiang.Hou@nxp.com>
This PCIe controller is based on the Mobiveil GPEX IP, which is
compatible with the PCI Express™ Base Specification, Revision 4.0.
Signed-off-by: Hou Zhiqiang <Zhiqiang.Hou@nxp.com>
Reviewed-by: Minghuan Lian <Minghuan.Lian@nxp.com>
Hou Zhiqiang