Date: Fri, 10 Dec 2004 10:36:56 -0700 (MST) From: "M. Warner Losh" <imp@bsdimp.com> To: kamalp@acm.org, kamalpr@yahoo.com Cc: freebsd-hackers@freebsd.org Subject: Re: mmap() Message-ID: <20041210.103656.73381623.imp@bsdimp.com> In-Reply-To: <20041210040529.48001.qmail@web52708.mail.yahoo.com> References: <41B8C993.4070807@elischer.org> <20041210040529.48001.qmail@web52708.mail.yahoo.com>
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In message: <20041210040529.48001.qmail@web52708.mail.yahoo.com>
"Kamal R. Prasad" <kamalpr@yahoo.com> writes:
: So how does one use bus_dma within the USB framework?
: The API exists, but I don't think any of the src code
: in src/sys/dev/usb actually uses bus_dma. Oh btw -my
: data transfer is < 100K, so the 64-bit thing is not an
: issue.
It just happens. The transfers are done via DMA from the usb bridge
chipset.
Warner
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