Re: correct use of bus_dmamap_sync

From: Ruslan Ermilov (ru_at_FreeBSD.ORG)
Date: 10/25/05

  • Next message: Scott Long: "[Fwd: Re: use of bus_dmamap_sync]" 
    Date: Wed, 26 Oct 2005 00:04:25 +0300
To: Dinesh Nair <dinesh@alphaque.com>

    On Tue, Oct 25, 2005 at 04:10:52PM -0400, John Baldwin wrote:
    > On Tuesday 25 October 2005 02:46 pm, Dinesh Nair wrote:
    [...]
    > > > thus when you send data to your device, that is a WRITE operation (even
    > > > though your device is doing a DMA to read data), and when you get data
    > > > back from your device, that is a READ operation (even though your device
    > > > is doing a DMA to write the data into the buffer).
    > >
    > > thanx, the verbiage on the man page is slightly confusing with it's use of
    > > CPU, giving the opposite impression.
    >
    > Yes, I know. :)
    >
    Please go read the HEAD version of the manpage; it's been fixed recently
    to improve the description of these details.

    Cheers, 

    -- 
Ruslan Ermilov
ru@FreeBSD.org
FreeBSD committer

  • Next message: Scott Long: "[Fwd: Re: use of bus_dmamap_sync]"