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/loongson/include/pci_machdep.h b/sys/arch/loongson/include/pci_machdep.h
index bf793286a94..7ee2396b940 100644
--- a/sys/arch/loongson/include/pci_machdep.h
+++ b/sys/arch/loongson/include/pci_machdep.h
@@ -1,4 +1,4 @@
-/*	$OpenBSD: pci_machdep.h,v 1.5 2011/05/21 21:36:39 kettenis Exp $ */
+/*	$OpenBSD: pci_machdep.h,v 1.6 2011/10/10 19:42:36 miod Exp $ */
 
 /*
  * Copyright (c) 2003-2004 Opsycon AB  (www.opsycon.se / www.opsycon.com)
@@ -82,6 +82,7 @@ struct mips_pci_chipset {
     (*(c)->pc_intr_establish)((c)->pc_intr_v, (ih), (l), (h), (a), (nm))
 #define	pci_intr_disestablish(c, iv)					\
     (*(c)->pc_intr_disestablish)((c)->pc_intr_v, (iv))
+#define	pci_probe_device_hook(c, a)	(0)
 
 /* PCI view of CPU memory */
 extern paddr_t loongson_dma_base;