timer: for NAV, lifetime, backoff, IFS, timeout
phy inf buffer - data path between phy and mac
bus inf buffer - data path between bus and mac
aggregation engine：
msdu aggr
mpdu aggr
ce engine： encyp
de-aggregation engine：
mpdu de-aggre
msdu de-aggre
channel access engine:
ac_vo queue
ac_vi queue
ac_be queue
ac_bf queue
protection engine：
NAV gen
backoff gen
auto-rate engine：
tx_rate select
priority access module:
beacon management
wakeup management
internal frame gen: rts/cts/ack/ba
BA management:
bitmap gen
fifo flush
debug_module-
interrupt gen module-
buffer status gen
timeout
rx parser -
filter & drop management
buffer management
lifetime management