> Date: Fri, 09 Mar 2001 10:29:22 -0800
> From: David Brownell <david-b@pacbell.net>
> > > extern void *
> > > pci_pool_dma_to_cpu (struct pci_pool *pool, dma_addr_t handle);
> >
> > Do lots of drivers need the reverse mapping? It wasn't on my todo list
> > yet.
>
> Some hardware (like OHCI) talks to drivers using those dma handles.
I wonder if it may be feasible to allocate a bunch of contiguous
pages. Then, whenever the hardware returns a bus address, subtract
the remembered bus address of the zone start, add the offset to
the virtual and voila.
-- Pete
-
To unsubscribe from this list: send the line "unsubscribe linux-kernel" in
the body of a message to majordomo@vger.kernel.org
More majordomo info at http://vger.kernel.org/majordomo-info.html
Please read the FAQ at http://www.tux.org/lkml/
This archive was generated by hypermail 2b29 : Thu Mar 15 2001 - 21:00:10 EST