Messages in this thread |  | | From | Albert Cahalan <> | Subject | Re: SVGA kernel chipset drivers. | Date | Tue, 4 Jun 1996 07:15:59 -0400 (EDT) |
| |
> Sure. It's convenient to just say "do it in the kernel". > > In short, it's convenient to try to shuffle onto somebody else. That > somebody else happens to be ME, which is why I don't think it's in the > least convenient, I just think it's a horribly braindead idea.
We're not asking you to write it. You can even let someone else send you big conglomerate patches instead of hundreds of tiny ones.
>>>> Trust me, we're not talking VGA here. We're talking _high_ end graphics, >>>> that don't have frame-buffers because that interferes with the normal >>>> mode of operations (painting the screen) for no real good reason (the >>>> actual drawing is then done using screen commands and/or DMA to the card >>>> to fill a area with data). >>> >>> Are you thinking of the XGA? That's the only card I can think of that >>> uses DMA. > > Get your mind out of the gutter of PC hardware.. It seems some of the SGI > graphics card use DMA exclusively, for example. And I wouldn't call the SGI > graphics hardware exactly broken..
Well then, how does a user-space driver use DMA?
|  |