Introduce pci_probe_device_hook(pci_chipset_tag_t, struct pci_attach_args *).

This mandatory function will get invoked in pci_probe_device(), and allows
a pci host driver to alter the pci_attach_args passed to a device when
attaching.

This function will also, if returning non-zero, cause the device to be
skipped completely during all the phases of the PCI device discovery
(i.e. ressource enumeration, ressource assignment, and actual attachment).
This particular feature is experimental and might be reverted in the future
(or the scope narrowed to device attachment only).

A dummy #define pci_probe_device_hook() 0 is added to all platforms except
sgi, where real functions (currently only returning 0) are added; real meat
will be added shortly.

Discussed at s2k11, no objection from the usual suspects.

1 files changed, 2 insertions, 1 deletions

diff --git a/sys/arch/hppa/include/pci_machdep.h b/sys/arch/hppa/include/pci_machdep.h
index 3f3c60fdfc1..0678674fe78 100644
--- a/sys/arch/hppa/include/pci_machdep.h
+++ b/sys/arch/hppa/include/pci_machdep.h
@@ -1,4 +1,4 @@
-/*	$OpenBSD: pci_machdep.h,v 1.8 2011/05/21 21:36:17 kettenis Exp $	*/
+/*	$OpenBSD: pci_machdep.h,v 1.9 2011/10/10 19:42:36 miod Exp $	*/
 
 /*
  * Copyright (c) 2003 Michael Shalayeff
@@ -88,6 +88,7 @@ struct hppa_pci_chipset_tag {
     (*(c)->pc_intr_establish)((c)->_cookie, (ih), (l), (h), (a), (nm))
 #define	pci_intr_disestablish(c, iv)					\
     (*(c)->pc_intr_disestablish)((c)->_cookie, (iv))
+#define	pci_probe_device_hook(c, a)	(0)
 
 #define	pciide_machdep_compat_intr_establish(a, b, c, d, e)	(NULL)
 #define	pciide_machdep_compat_intr_disestablish(a, b)	((void)(a), (void)(b))