PCI Express Transaction Types

TLP List

• Posted MemWrite, Msg, MsgD
• NonPosted others except completion
• Completion : Cpl, CplD

With Data

• posted wd/MemWrite, MsgD, wod/msg
• nonposted wd/IOwrite, cfgwt
• cpl wd/cplD, wod/cpl

Note

1. iowrite, cfgwrite is nonposted
2. Msg has MsgD and Msg.
3. Cpl has Cpl and CplD.

io request

length of io write must 1dw.

参考