Re: User mode drivers: part 2: PCI device handling (patch 1/2 for 2.6.11)
From: Greg KH
Date: Fri Mar 11 2005 - 10:25:00 EST
On Fri, Mar 11, 2005 at 07:34:46PM +1100, Peter Chubb wrote:
> >>>>> "Greg" == Greg KH <greg@xxxxxxxxx> writes:
> Greg> On Fri, Mar 11, 2005 at 02:37:17PM +1100, Peter Chubb wrote:
> >> +/* + * The PCI subsystem is implemented as yet-another pseudo
> >> filesystem, + * albeit one that is never mounted. + * This is its
> >> magic number. + */ +#define USR_PCI_MAGIC (0x12345678)
> Greg> If you make it a real, mountable filesystem, then you don't need
> Greg> to have any of your new syscalls, right? Why not just do that
> Greg> instead?
> The only call that would go is usr_pci_open() -- you'd still need
> , usr_pci_unmap()
In fact, both of the above can be done today from /proc/bus/pci/ right?
> and usr_pci_get_consistent().
Hm, this one might be different. How about just opening and mmap a new
file for the pci device for this?
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