[patch 2/5] Staging: vme: add VME userspace driver

Greg KH gregkh at suse.de
Mon Aug 10 16:29:10 UTC 2009


On Mon, Aug 10, 2009 at 05:26:06PM +0200, Emilio G. Cota wrote:
> Martyn Welch wrote:
> >>> Instead of using that we implemented a heretic IOCTL-based
> >>> interface for user-space; at least with it you could create a
> [ snip ]
> >>> #define VME_IOCTL_START_DMA             _IOWR('V', 10, struct vme_dma)
> >>>
> > I am moving the interface in that direction, I remain unconvinced about  
> > the contents of your vme_mapping structure, it's too tsi-148 specific.
> 
> Could you please point out why is too tsi148-specific?
> 
> The point here is that the driver should know *nothing* about
> windows, etc. What it should just know is:
> - I want a mapping of a certain size to VME address X
> The struct provides exactly this.

So does the existing UIO interface, right?  Please don't reinvent the
wheel here :)

thanks,

greg k-h



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