Messages in this thread | | | Date | Wed, 12 Aug 2009 10:57:09 +0100 | From | Martyn Welch <> | Subject | Re: [patch 2/5] Staging: vme: add VME userspace driver |
| |
Emilio G. Cota wrote: > Martyn Welch wrote: > >> Also, it seems that your API doesn't currently support Location >> Monitors. These are specified in the VME spec, I'd be interested in >> how >> you plan to support this feature in a consistent manner with your >> current API >> > > What I intend to provide is a sane environment to work with VME > devices. The first step is to cover the needs of most use cases: > > - 1 master Single Board Computer (SBC) running Linux > - All the other slots have slave devices in them. These devices > are controlled by kernel drivers on the SBC. > - The SBC does DMA, direct I/O access (mapping) to/from the > slaves, and handles interrupts from the devices. > > Once that's settled we could discuss about further parts of the > spec. But really today getting the above right is _much_ more > important than location monitors support. > Right - this is a specific case that you see as important. Depending on the number of slots in the rack and the diversity of the cards used, the VME core and driver I have suggested already covers this.
However, I also need to consider other cases, such as communications between multiple SBCs and potentially a few slave devices. I have a need for this *now*, not in the future. To me, slave support and to a lesser degree location monitor support is important now, hence why it's supported in my driver and core. Hence why I am asking, how do you propose to support these features?
Martyn > E. >
-- Martyn Welch MEng MPhil MIET (Principal Software Engineer) T:+44(0)1327322748 GE Fanuc Intelligent Platforms Ltd, |Registered in England and Wales Tove Valley Business Park, Towcester, |(3828642) at 100 Barbirolli Square, Northants, NN12 6PF, UK T:+44(0)1327359444 |Manchester,M2 3AB VAT:GB 927559189
| |