43 messages in org.freebsd.freebsd-archRe: Extending sys/dev/mii| From | Sent On | Attachments |
|---|---|---|
| Stefan Bethke | Jan 4, 2012 8:03 am | |
| Adrian Chadd | Jan 4, 2012 9:07 am | |
| Marius Strobl | Jan 4, 2012 1:59 pm | |
| Stefan Bethke | Jan 5, 2012 12:52 pm | |
| Stefan Bethke | Jan 6, 2012 4:56 am | |
| Stefan Bethke | Jan 6, 2012 5:02 am |  .diff |
| Marius Strobl | Jan 6, 2012 10:27 am | |
| Stefan Bethke | Jan 6, 2012 12:35 pm | |
| Marius Strobl | Jan 6, 2012 1:47 pm | |
| Stefan Bethke | Jan 6, 2012 1:52 pm | |
| Marius Strobl | Jan 8, 2012 5:00 am | |
| Stefan Bethke | Jan 8, 2012 2:27 pm | |
| Adrian Chadd | Jan 10, 2012 5:18 pm | |
| Marius Strobl | Jan 11, 2012 11:37 am | |
| Adrian Chadd | Jan 14, 2012 8:15 pm | |
| Warner Losh | Jan 14, 2012 9:13 pm | |
| Stefan Bethke | Jan 20, 2012 3:08 pm | .patch |
| Warner Losh | Jan 20, 2012 5:43 pm | |
| Oleksandr Tymoshenko | Jan 20, 2012 8:12 pm | |
| Stefan Bethke | Jan 21, 2012 4:02 am | |
| Aleksandr Rybalko | Jan 21, 2012 5:12 am | |
| Oleksandr Tymoshenko | Jan 23, 2012 11:45 pm | |
| Aleksandr Rybalko | Jan 24, 2012 5:53 am | |
| Marius Strobl | Jan 25, 2012 2:17 pm | |
| Warner Losh | Jan 25, 2012 2:28 pm | |
| Marius Strobl | Jan 25, 2012 3:21 pm | |
| Hans Petter Selasky | Jan 26, 2012 8:24 am | |
| Stefan Bethke | Jan 26, 2012 8:24 am | |
| Stefan Bethke | Jan 26, 2012 8:30 am | |
| Marius Strobl | Jan 27, 2012 6:15 am | |
| Adrian Chadd | Feb 10, 2012 9:22 pm | |
| Marius Strobl | Feb 11, 2012 3:17 am | |
| Aleksandr Rybalko | Feb 11, 2012 4:45 am | |
| Adrian Chadd | Feb 11, 2012 4:59 pm | |
| Warner Losh | Feb 11, 2012 5:15 pm | |
| Adrian Chadd | Feb 11, 2012 8:48 pm | |
| Warner Losh | Feb 11, 2012 8:58 pm | |
| Juli Mallett | Feb 11, 2012 9:05 pm | |
| Adrian Chadd | Feb 11, 2012 9:19 pm | |
| Aleksandr Rybalko | Feb 12, 2012 9:51 am | |
| Aleksandr Rybalko | Feb 12, 2012 10:04 am | |
| Juli Mallett | Feb 12, 2012 10:30 am | |
| Aleksandr Rybalko | Feb 12, 2012 10:38 am |
| Subject: | Re: Extending sys/dev/mii | |
|---|---|---|
| From: | Stefan Bethke (st...@lassitu.de) | |
| Date: | Jan 21, 2012 4:02:28 am | |
| List: | org.freebsd.freebsd-arch | |
Am 21.01.2012 um 02:43 schrieb Warner Losh:
On Jan 20, 2012, at 5:08 PM, Stefan Bethke wrote:
The second problem is that there's currently no way to express a dependency
between two devices other than a parent-child relationship. I would be
interested to learn why this appears to be so uncommon that I could not find any
discussion of such a feature. Has it really never before come up?
Sure there is: you can do it by name. I wrote a driver that attached to the ISA
bus, but also needed to talk to the ppbus that was attached to the printer. My
solution was to have a post-attach name-lookup so that it could then call
methods on the other driver's device_t. I wonder why we can't do that here?
That was my first approach, but the attachment sequence foiled it: arge0 is
probed and attached before the device that provides the MDIO bus arge0 needs to
attach the miibus and phy. As far as I can tell, there is no way to express
(via code or hints or otherwise) that a device should be attached only after
some other device has been attached.
The solution for me was to write miiproxy which contains code that waits for
both devices to attach, and then calls a callback on arge0 to complete the
interface attachment (attaches miibus, makes the interface available).
From a driver writers point of view, it would be desirable to be able to say
"attach this only after 'foo0' has been attached", so the attach method can
still be a single, linear piece of code.
Stefan
-- Stefan Bethke <st...@lassitu.de> Fon +49 151 14070811
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