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SubjectRe: SVGA kernel chipset drivers.
Date
> Nope, the kernel can provide a framebuffer device in /dev that
> programs can mmap. IO port access is less critical.
We had this argument before. Some cards dont have a frame buffer.

I/O port access is critical. The "frame buffer" of most cards is actually
a window of 64K onto a mapped space. Its critical enough the X servers do
iopl() rather than ioperm to save a few clocks (2 or 3) for each out/in they
do.

> The real reasons for such a driver are reliability and security.

Which only need kernel support for "restore to text mode".


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