# Re: \[PATCH 1/6\] rapidio: add common mapping APIs for RapidIO memory access

- From: Kumar Gala \<hidden\>
- Date: 2009-06-11 04:15:44 
- List: netdev
- Page: https://ratatoskr.run/netdev/2009/06/1262394
- Thread: https://ratatoskr.run/netdev/2009/05/1249321/t.md

```text

On May 12, 2009, at 3:35 AM, Li Yang wrote:

> 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.

> ---
> drivers/rapidio/rio.c   |   95 +++++++++++++++++++++++++++++++++++++++++++++++
> include/linux/rio.h     |   25 ++++++++++++
> include/linux/rio_drv.h |   24 +++++++++---
> 3 files changed, 138 insertions(+), 6 deletions(-)

- k
```