Linus Torvalds <[EMAIL PROTECTED]> writes: > On Sat, 25 Oct 2003, Egbert Eich wrote: > > > > Speaking of XFree86: when I developed the PCI resource stuff in > > XFree86 I was trying to get support from kernel folks to get the > > appropriate user space interfaces into the kernel. When I got > > nowhere I decided to do everything myself. > > There won't be any "user space interfaces". There are perfectly good > in-kernel interfaces, and anybody who needs them needs to be in kernel > space. Ie the kernel interfaces are for kernel modules, not for user space > accesses.
Well almost. There is still one significant flaw in the kernel space stuff. The BIOS can specify arbitrary regions as reserved in the E820 map and then a kernel driver can't use that region itself. This shows up in corner cases where the resource on the PCI device is a boolean rather than a general purpose thing. Particularly for mtd map drivers to allow flashing your ROM from linux this is a problem. This is not required for 2.6.0 but it would be nice to actually be able to reliably reserve resources in kernel drivers. Eric ------------------------------------------------------- This SF.net email is sponsored by: The SF.net Donation Program. Do you like what SourceForge.net is doing for the Open Source Community? Make a contribution, and help us add new features and functionality. Click here: http://sourceforge.net/donate/ _______________________________________________ Dri-devel mailing list [EMAIL PROTECTED] https://lists.sourceforge.net/lists/listinfo/dri-devel
