Messages in this thread |  | | Date | Mon, 02 Oct 2000 15:47:56 -0500 | From | Timur Tabi <> | Subject | Re: Inter-device-driver communication? |
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** Reply to message from Jeff Garzik <jgarzik@mandrakesoft.mandrakesoft.com> on Mon, 2 Oct 2000 15:31:59 -0500 (CDT)
> You must describe -what- is being communicated, -how much- data is being > communicated, and -how often- communication occurs before we can help > suggest a method of driver<->driver communication.
Ok, let me try again!
The primary communication needs to be high-speed above all else. The amount of data that needs to be sent is rather small, typically just a small structure. However, there will be plenty of pointers in these structures, and these pointers mostly point to buffers of about 1-8KB. Since the kernel is monolothic, I don't expect there to be a need to translate virtual addresses.
As for how often, these calls are made probably as much as 50 times a second, but irregularly. One of the drivers involved is attached to the VM, so it will need to pass data along as often as the VM is called.
-- Timur Tabi - ttabi@interactivesi.com Interactive Silicon - http://www.interactivesi.com
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