So, are we able to maybe able to set up a bounty on this? Użytkownik [email protected] napisał:
>>> >>> USB3 at least is not solely desktop relevant. I have a backburnered plan >>> to work on this. >>> >>> Unfortunately, I don't believe that getting good USB3 type performance is >>> possible with our current USB stack. (Furthermore, our USB stack is a >>> convoluted mess -- owing largely to the way it was designed using STREAMs >>> -- which actually makes writing USB drivers very unlike any other kind of >>> driver.) >>> >>> My long running plan (probably won't get to this until 2013, if I'm honest) >>> is to try to rewrite (perhaps a parallel stack) the USB stack to support >>> USB 3 devices. It should be implemented to be much more of a typical >>> nexus/leaf driver model. (Let's be honest, nobody really benefits from the >>> STREAMs architecture that underpins the current stack. I've never heard of >>> anyone pushing other kinds of modules between USB controllers and leaf >>> devices, for example.) >>> >>> The end result will also make it *much* easier to port drivers from other >>> platforms. (Right now, the USBA is alien enough to all other platform >>> implementations that its almost impossible to borrow any significant logic >>> from any other implementations.) >> >> Would it be possible to lift most of the USB stack from FreeBSD? I mean, >> if they are further along, why not partake of their superior features? >> Like FreeBSD pulls in ZFS. Open-source means everybody wins. > >I'm not sure about *most*, but certainly we ought to be able to suck in >substantial portions of the host controller and device drivers. I guess maybe >50-60% of that code may be usable for us, and I am completely happy to >leverage that. ;-) In fact, I'd say that facilitating this kind of sharing >should be a goal, although not a prime directive. (I wouldn't throw away the >rest of the DDI or try to build a glue layer, for example. But having a >design that is basically more familiar than the STREAMs weirdness will go a >long way in the right direction.) > >I think it will be *very* hard to get more than that though, even with a >design that is much friendlier to that type of sharing than we have in the >current USBA stack. (Under the current USBA stuff, I think about 10% of the >code might be shareable.) > >(Btw, we do already lift a lot of things from FreeBSD, and they lift from us >too. We get pieces of libc, a number of userland components, and various >device drivers from them. From us they get some of our userland enhancements >(e.g. localedef, some of my collation improvements), DTrace, ZFS. Its win-win >for everyone. :-) > > - Garrett > > > >_______________________________________________ >oi-dev mailing list >[email protected] >http://openindiana.org/mailman/listinfo/oi-dev _______________________________________________ oi-dev mailing list [email protected] http://openindiana.org/mailman/listinfo/oi-dev
