Date: Sun, 12 Feb 2012 10:30:50 -0800 From: Juli Mallett <jmallett@FreeBSD.org> To: Aleksandr Rybalko <ray@ddteam.net> Cc: Adrian Chadd <adrian@freebsd.org>, Stefan Bethke <stb@lassitu.de>, Marius Strobl <marius@alchemy.franken.de>, Aleksandr Rybalko <ray@freebsd.org>, FreeBSD-arch <freebsd-arch@freebsd.org> Subject: Re: Extending sys/dev/mii Message-ID: <CACVs6=9MuvJG4ias1mvCWShjTVaEhX=e0q%2B93iR_BaJg2evrcg@mail.gmail.com> In-Reply-To: <20120212200437.05c7677f.ray@ddteam.net> References: <95372FB3-406F-46C2-8684-4FDB672D9FCF@lassitu.de> <20120106214741.GB88161@alchemy.franken.de> <F60B2B70-049F-4497-BBA8-3C421088C1EA@lassitu.de> <20120108130039.GG88161@alchemy.franken.de> <23477898-8D85-498C-8E30-192810BD68A8@lassitu.de> <20120111193738.GB44286@alchemy.franken.de> <66DDA0A2-F878-43FF-8824-54868F493B18@lassitu.de> <20120125221753.GA17821@alchemy.franken.de> <AF2CF7A4-27B8-4181-96F5-7998B126CD1C@lassitu.de> <CAJ-VmomcgC6V-sY7jN%2Bh6T7uPfVesPBV%2BKPu2TVD4YDKrdk4LQ@mail.gmail.com> <20120211111731.GE39861@alchemy.franken.de> <20120211144544.c91701d9.ray@ddteam.net> <CAJ-Vmo=CLMcO%2BR21TVKC3zVGS4rHO2Ca31D9ts2kNwpnhAtOvQ@mail.gmail.com> <B1700D0A-240D-4274-AA3F-FCA798AD2F14@bsdimp.com> <CAJ-Vmon=cPivcJjb_dvuMzsok2Qp-MeNLK0uNo5g8O2ekEaOMA@mail.gmail.com> <58EA57DC-75DF-4813-BB03-FD27F2A49BA2@bsdimp.com> <20120212200437.05c7677f.ray@ddteam.net>
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> > The PHYs don't sit on arge1. They sit on another device that the > > driver bogusly assumes is tightly coupled to arge1, when in fact it > > isn't. > > At least for AR7240/AR7242, MDIO control registers lie in the middle of > register space used by if_arge. That's a fine electrical and address-oriented understanding, but that doesn't mean that a different functional conceptualization wouldn't lend itself better to implementation. Fidelity to the memory layout is a neat idea but not necessarily desirable or even reasonable.
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