Messages in this thread | | | Date | Fri, 11 Mar 2005 07:21:06 -0800 | From | Greg KH <> | Subject | Re: User mode drivers: part 2: PCI device handling (patch 1/2 for 2.6.11) |
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On Fri, Mar 11, 2005 at 07:34:46PM +1100, Peter Chubb wrote: > >>>>> "Greg" == Greg KH <greg@kroah.com> 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_map()
see mmap(2)
> , usr_pci_unmap()
see munmap(2)
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?
thanks,
greg k-h - To unsubscribe from this list: send the line "unsubscribe linux-kernel" in the body of a message to majordomo@vger.kernel.org More majordomo info at http://vger.kernel.org/majordomo-info.html Please read the FAQ at http://www.tux.org/lkml/
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