[5200B/slightly ot] MPC52xx LPB FIFO memory requirements

[Albrecht Dreß]

Hi all,

I have a slightly off-topic question regarding the use of mpc52xx_lpbfifo_submit() & friends...

In struct mpc52xx_lpbfifo_request, the element 'data' (with address 'data_phys') is apparently the chunk of data which is transferred through bestcomm, right?  Dumb question: has this chunk of memory to be DMA mem (i.e. allocated via dma_alloc_coherent), or is "normal" kernel memory (kmalloc) sufficient?

Thanks,
Albrecht.
-------------- next part --------------
A non-text attachment was scrubbed...
Name: not available
Type: application/pgp-signature
Size: 190 bytes
Desc: not available
URL: <http://lists.ozlabs.org/pipermail/linuxppc-dev/attachments/20110309/b0d23125/attachment.pgp>