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

From: Albrecht Dreß <[email-masked]>
Date: Wed, 09 Mar 2011 21:45:51 +0100

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.