Date: Wed, 13 Feb 2002 10:47:58 -0800 From: Michael Smith <msmith@freebsd.org> To: "mike varga" <mike.varga@cavium.com> Cc: "Steve Kargl" <sgk@troutmask.apl.washington.edu>, freebsd-arch@freebsd.org Subject: Re: bus_dma_load_uio() function Message-ID: <200202131847.g1DIlwg01147@mass.dis.org> In-Reply-To: Your message of "Tue, 12 Feb 2002 17:33:37 PST." <000701c1b42e$7835eda0$b210a8c0@netscreen5>
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> Yes I did, but thank you > for replying. > > My question essentially > boils down to,"How do you > map and lock user pages (buffers) > for use in a driver that wants > to do a DMA directly > from/to them. > > It removes unnecessary > copies. Typically, you let the kernel do this for you, via the physio interface. -- To announce that there must be no criticism of the president or that we are to stand by the president right or wrong is not only unpatriotic and servile, but is morally treasonable to the American public. - Theodore Roosvelt To Unsubscribe: send mail to majordomo@FreeBSD.org with "unsubscribe freebsd-arch" in the body of the message
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