Date: Mon, 22 May 2006 15:17:29 -0400 From: Anish Mistry <mistry.7@osu.edu> To: freebsd-usb@freebsd.org, Hans Petter Selasky <hselasky@c2i.net> Cc: "Daan Vreeken \[PA4DAN\]" <Danovitsch@vitsch.net>, Dag-Erling =?iso-8859-1?q?Sm=F8rgrav?= <des@des.no>, Robert Watson <rwatson@freebsd.org>, Arch@freebsd.org Subject: Re: Resend with subject: No more non-MPSAFE network device drivers, please! Message-ID: <200605221518.03687.mistry.7@osu.edu> In-Reply-To: <200605222037.14030.Danovitsch@vitsch.net> References: <20060522144542.T21787@fledge.watson.org> <86y7wum9ow.fsf@xps.des.no> <200605222037.14030.Danovitsch@vitsch.net>
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--nextPart67549360.mrISMqu43M Content-Type: text/plain; charset="iso-8859-1" Content-Transfer-Encoding: quoted-printable Content-Disposition: inline On Monday 22 May 2006 14:37, Daan Vreeken [PA4DAN] wrote: > On Monday 22 May 2006 16:10, Dag-Erling Sm=F8rgrav wrote: > > Robert Watson <rwatson@FreeBSD.org> writes: > > > Per discussion at the developer summit, a significant rewrite > > > of the USB code is needed to make it MPSAFE. Volunteers > > > welcome. > > > > HP Selasky claims to have a working Giant-free USB stack: > > (added him to the 'cc' list) > > > http://www.turbocat.net/~hselasky/usb4bsd/index.html > > > > No idea how well it works, though. > > I have been running his USB driver on a production server for > months here without a single problem. I use his ugen implementation > to communicate with a custom made USB device. On FreeBSD's USB > driver a stress test would fail after max 40,000 requests. I've got a patch in a PR that fixes several ugen issues. > With his=20 > USB driver I have successfully made over 30,000,000 requests before > stopping the test manually. > > There is a problem with his code though. (At least, there was back > when I last looked at it, correct me if I'm wrong.) He has > completely rewritten the OHCI, UHCI and EHCI parts, but kept the > original (network, storage, etc) drivers. For the original drivers > to work he has added some wrapper functions. Back when I looked > these wrappers didn't work out of the box for the devices I have > tried. > All "old" drivers need to be converter to "new world order" for > them to work properly. > > That's the only problem I have been having with his driver : You > get a better USB stack, but with less working drivers. > I think it would be great to get his code into -current, but some > developers would have to help out to convert the existing drivers. I'd be willing to help convert drivers if we can get the code into the=20 tree (maybe as usb-ng?). Setting up a bounty for this stuff may be=20 worthwhile since having a solid USB stack would be a boon for=20 everyone. I'm not sure if it's possible with the HPS driver, but it would be=20 nice if every USB device could expose ugen endpoints along with their=20 device specific nodes. =2D-=20 Anish Mistry --nextPart67549360.mrISMqu43M Content-Type: application/pgp-signature -----BEGIN PGP SIGNATURE----- Version: GnuPG v1.4.3 (FreeBSD) iD8DBQBEcg5rxqA5ziudZT0RAkFEAJ9p0HaaD9uecdAg1HZCRcWP5ntcVACgpyG2 jaEyQZPvohSIxl215FYKYy8= =pFvQ -----END PGP SIGNATURE----- --nextPart67549360.mrISMqu43M--
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