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 6, 2012 4:56:43 am | |
| List: | org.freebsd.freebsd-arch | |
Am 05.01.2012 um 21:52 schrieb Stefan Bethke:
The problem with this is that the miibus instance might not be a (transitive)
child of the ethernet driver that has the MII that needs to be adjusted to the
new PHY settings. And since the method does not provide any parameters about
which phy or miibus did issue the method, or which ifp it applies to, bubbling
it up won't work (that the scenario where the PHY for arge0 is connected to the
switch's MDIO, which is attached to arge1's MDIO).
Since the parent will now be the mdiobus, miibus needs effectively two
attachments, one to the provider of the MDIO access, the other for the ethernet
interface. I propose to associate the ethernet interface by a modified
mii_attach() function that takes a device_t (of the ethernet driver) instead of
the two callback function pointers.
Please elaborate on why these changes are technically necessary to implement what you are trying do. Otherwise I prefer to avoid them given the rototilling they'd cause.
Necessary is a strong word. Right now, I'm trying to understand how a sensible
change would even look like, and which combination of glue code and miibus
changes make the most sense.
Let me see if I can come up with a prototype patch the next couple of days, so
we don't have to theorize about the changes that might or might not be
necessary.
Here's a patch that causes zero rototilling, if I'm not mistaken.
The patch implements the split between the MDIO access and notifications posted
to the ethernet interface device that has the MII that needs to be adjusted in
accordance with the PHY autonegotiation results. I've added a field to the
ivars struct and not the softc, because the softc is included by many network
drivers, while the ivars are private to mii.c For this reason, I believe this
change is API and ABI compatible, and likely can be MFCed. (I believe MFCing is
not high on the priority list because many other parts in sys/mips would need to
be MFCed first for all the Atheros platforms to become fully usable, but Adrian
can correct me.)
A second patch will implement a separate MDIO bus driver, but I haven't finished
that yet. It s completely independent of the above change.
Stefan
-- Stefan Bethke <st...@lassitu.de> Fon +49 151 14070811
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