[RFC] Inter-processor Mailboxes Drivers
jamie at jamieiles.com
Mon Feb 14 21:01:04 EST 2011
On Fri, Feb 11, 2011 at 03:19:51PM -0600, Meador Inge wrote:
> 1. Hardware specific bits somewhere under '.../arch/*'. Drivers
> for the MPIC message registers on Power and OMAP4 mailboxes, for
> 2. A higher level driver under '.../drivers/mailbox/*'. That the
> pieces in (1) would register with. This piece would expose the
> main kernel API.
> 3. Userspace interfaces for accessing the mailboxes. A
> '/dev/mailbox1', '/dev/mailbox2', etc... mapping, for example.
How about using virtio for all of this and having the mailbox as a
notification/message passing driver for the virtio backend? There are
already virtio console and network drivers that could be useful for the
userspace part of it. drivers/virtio/virtio_ring.c might be a good
starting point if you thought there was some mileage in this approach.
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