Date: Fri, 01 Sep 2006 10:05:00 -0600 From: Scott Long <scottl@samsco.org> To: John Baldwin <jhb@freebsd.org> Cc: doc-committers@freebsd.org, cvs-doc@freebsd.org, cvs-all@freebsd.org, Joel Dahl <joel@freebsd.org> Subject: Re: cvs commit: www/en/projects/busdma index.sgml Message-ID: <44F85A2C.7010107@samsco.org> In-Reply-To: <200609011107.06707.jhb@freebsd.org> References: <200609010917.k819HchG077559@repoman.freebsd.org> <44F84699.7030301@samsco.org> <200609011107.06707.jhb@freebsd.org>
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John Baldwin wrote: > On Friday 01 September 2006 10:41, Scott Long wrote: > >>Joel Dahl wrote: >> >> >>>joel 2006-09-01 09:17:38 UTC >>> >>> FreeBSD doc repository >>> >>> Modified files: >>> en/projects/busdma index.sgml >>> Log: >>> - Add a bunch of missing USB network drivers: aue(4), axe(4), cdce(4), >>> cue(4), kue(4), rue(4) and udav(4). Mark everything as unknown for > > now. > >>> - Fix minor nits. >>> >>> Revision Changes Path >>> 1.147 +87 -10 www/en/projects/busdma/index.sgml >> >>The DMA capability of a USB peripheral is a function of the USB stack >>and controller, not the peripheral driver. Unlike a PCI card, a USB >>periph does not have access to host memory. All of the real magic seems >>to happen in places like usbd_setup_xfer(), which again is a function of >>the stack, not the periph driver. These drivers don't belong on this >>list at all, and I'd argue that no USB periph drivers do. > > > The only reason they might is that this list has become a list not just of > bus-dma conformance, but locking as well (i.e. a general driver > feature/requirement list), so while the DMA-related entries should probably > be N/A for the USB devices, the locking fields are still relevant. We could > move the list of drivers to a separate driver-features list page if you would > prefer. > Yeah, I forgot about the co-opted use. No need to create a new list. Scott
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