On Wed, 2008-11-19 at 11:21 +0200, Tomas Winkler wrote: > > Indeed. One would seem to be the buffer list itself, which also needs to > > fit within a 40-bit mask with 256 alignment (rxq->bd), the rb_stts needs > > 16-byte alignment which probably is always satisfied, but I'm not sure, > > you'll need to research the alignment guarantees. > > Note these are allocated using persistent calls and not kmalloc I hope > at least does are page alignment. Good point. On powerpc at least that uses alloc_pages internally. > We have some alignment requirements also on TX side > > > > > Another, different, question: I don't see where the driver tells the > > hardware how large the buffers are it allocated. Can you point me to > > that? You can switch 4k/8k ampdu but I don't see where you tell the > > hardware. > > in iwl_rx_init > rb_size = > FH_RCSR_RX_CONFIG_REG_VAL_RB_SIZE_4K .. 8K .. can go up to 16K. > This amsdu size (not ampdu) influence the size of RB we choose Thanks. Yeah, ampdus are deaggregated already, my mistake. johannes
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