Date: Tue, 12 May 2009 12:17:05 -0400 From: John Baldwin <jhb@freebsd.org> To: Stanislav Sedov <stas@freebsd.org> Cc: svn-src-head@freebsd.org, svn-src-all@freebsd.org, src-committers@freebsd.org Subject: Re: svn commit: r192018 - head/sys/arm/at91 Message-ID: <200905121217.06048.jhb@freebsd.org> In-Reply-To: <200905121607.n4CG78wX026915@svn.freebsd.org> References: <200905121607.n4CG78wX026915@svn.freebsd.org>
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On Tuesday 12 May 2009 12:07:08 pm Stanislav Sedov wrote: > Author: stas > Date: Tue May 12 16:07:08 2009 > New Revision: 192018 > URL: http://svn.freebsd.org/changeset/base/192018 > > Log: > - Implement detach path. > - Release memory and DMA resources on stop. > - Unload the associated DMA maps after transmit is complete. Most NIC drivers that I am familiar with do not destroy DMA resources (tags and maps) during stop() and then create them during if_init(). Instead, they create those during attach() and detach(). They do tend to populate the RX ring with buffers during if_init() and free all of the mbus during stop() though. -- John Baldwin
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