Ethernet over PCIe driver for Inter-Processor Communication

[Scott Wood]

On Thu, 2013-08-22 at 21:04 +0530, Saravanan S wrote:

> a)   I can generate MSI interrupts from End Point to Root Complex over
> PCI . But the vice-versa is not possible . However i need a method to
> interrupt the End Point from the Root Complex to complete my driver.
> Only previous references I can find are this post
> http://www.mail-archive.com/linuxppc-dev@lists.ozlabs.org/msg25765.html . However this uses doorbells and I think may not be possible in MPC8640.

You should be able to write to the destination's MPIC registers to send
a doorbell.

-Scott