RapidIO: Flowcontrol?

[Bastiaan Nijkamp]

Hi,

I am currently working on a character device to benchmark the difference in
performance between an ethernet driver (rionet) and a character driver. One
issue that i am currently having is that i sometimes run out of mailbox
buffers when there is a lot of data being received. The read function then
does not get a chance to read the data because it
is continuously interrupted by the inbound ISR. When the receiver runs out
of buffers i would have expected that the transmitter would receive an
retry-packet symbol and that the data arrives as soon as some of the buffers
are cleared and reallocated (receiver controlled flow-control). Instead, the
transceiver totally hangs and i have to reset the processor to solve this. I
am using a p2p connection with two sbc85487 boards from windriver that both
feature a PowerQuicc 8548E.

Do i have to take actions when i reallocate the buffers e.g. resetting the
Mailbox Full error bit back to zero or something else?

Regards,
Bastiaan Nijkamp
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