Re: [Linux-fbdev-devel] fbdev API problems

[Sven <lu...@dp...>]

On Mon, Nov 19, 2001 at 08:10:09AM -0800, Sottek, Matthew J wrote:
> 
> >In fact imageblit is from a newer implementation, and meant for 2.5.x.
> 
> Geert,
>   Does this imply that in the newer version there is no high level
> drawing functions that are touching my mmio and memory pointers. It
> is all contained inside the driver? I certainly hope so.
>   To add to the point these pointers should not even be visible to
> the outside-of-driver world. It someone can see a virtual pointer,
> at some point they will try to use it. In some drivers this would
> cause bad things to happen.
> 
>   So what am I to do in the mean time? Is there a way to keep people
> from using the pointers?

You don't intent to run X ontop of your fbdev, do you ?
X uses the mmio & memory pointer to do its stuff, the same happens for other
apps (all of them) that use the fbdev. Even the DRI/DRM stuff is mostly
userspace, and the OpenGL access the board memory/mmio, trough the dma engine
though.

And getting all image stuff into the driver is nto the _right way_, at least
that is what linus decreted as he boycotted every attemps to do so, and most
people would agree with him, doing the minimal thing in the driver/kernel
space and the rest in userpsace.

Friendly,

Sven Luther