On Jun 11, 2009, at 4:47 AM, Li Yang-R58472 wrote:
quoted
On May 12, 2009, at 3:35 AM, Li Yang wrote:
quoted
Add the mapping functions used to support direct IO memory access of
rapidIO.
Signed-off-by: Zhang Wei <zw@zh-kernel.org>
Signed-off-by: Li Yang <redacted>
Use inbnd/outbnd instead of inb/outb which make one think of
byte level io accessors.
As I look at this I don't think this is the correct API. I
think we should be using the DMA mapping API to hide these
details. The concept of mapping like this seems to be more a
function of FSL's Address translation/mapping unit (ATMU) than
anything specific to the RIO bus standard.
This is a separate RIO block level ATMU. Although it looks like the
system level ATMU, system ATMU doesn't have the knowledge of rapidIO
target device ID. The mapping need to be dynamic, as it's easy to have
more RIO devices than the outbound windows.
I understand that. What I'm saying is the RIO block level ATMU is a Freescale specific detail and not part of any standard RIO bus programming model. We have mapping APIs that we can connect to for this via the DMA API layer.
- k