linux-kernel - Re: [patch 2/5] Staging: vme: add VME userspace driver

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Date:	Mon, 10 Aug 2009 17:26:06 +0200
From:	"Emilio G. Cota" <cota@...ap.org>
To:	Martyn Welch <martyn.welch@...anuc.com>
Cc:	Greg K-H <gregkh@...e.de>, linux-kernel@...r.kernel.org,
	devel@...uxdriverproject.org,
	Sebastien Dugue <sebastien.dugue@...l.net>
Subject: Re: [patch 2/5] Staging: vme: add VME userspace driver

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.

Also, could you please send me (off-list) documentation of the
Universe bridge? It'd be useful for the work on the generic layer.

E.
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