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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