Re: [PATCH 0/4] io_remap_pfn_range: intro.

William Lee Irwin III
2005-04-20T01:37:08Z

On Fri, Mar 18, 2005 at 11:25:45AM -0800, Randy.Dunlap wrote:
> This is a combination of io_remap_pfn_range patches posted in the
> last week or so by Keir Fraser and me.
> This description is mostly from Keir's original post.
> This patch introduces a new interface function for mapping bus/device
> memory: io_remap_pfn_range. This accepts the same parameters as
> remap_pfn_range and io_remap_page_range but should be used in any
> situation where the caller is not simply remapping ordinary RAM.
> For example, when mapping device registers the new function should be used.
> The distinction between remapping device memory and ordinary RAM is
> critical for the Xen hypervisor.
> This patch series also cleans up the remaining users of
> io_remap_page_range (in particular, the several sparc-specific
> sections in various drivers that use a special form of io_remap_page_range:
> an extra <iospace> argument for SPARC arch.) by converting them to
> use io_remap_pfn_range(), where io_remap_pfn_range() supports
> passing <iospace> as part of the pfn argument.
> The sparc32 & sparc64 code needs live testing.

Thanks for covering this for me (not that I've contributed a line of
code to this). I've got a very limited range of devices to test on
sparc so I'll have to wait for users' reports to come in.

-- wli