kernel: export pcienumcaps() for custom capability enumeration in drivers (virtio)

This used to be a internal function, but virtio
uses multiple structures with the same cap type
to indicate the location of various register
blocks in the pci bars so export it.

2 files changed, 5 insertions, 4 deletions

diff --git a/sys/src/9/port/pci.c b/sys/src/9/port/pci.c
index af4144533..7bfd60179 100644
--- a/sys/src/9/port/pci.c
+++ b/sys/src/9/port/pci.c
@@ -910,8 +910,8 @@ pciclrmwi(Pcidev* p)
 	pcicfgw16(p, PciPCR, p->pcr);
 }
 
-static int
-enumcaps(Pcidev *p, int (*fmatch)(Pcidev*, int, int, int), int arg)
+int
+pcienumcaps(Pcidev *p, int (*fmatch)(Pcidev*, int, int, int), int arg)
 {
 	int i, r, cap, off;
 
@@ -971,13 +971,13 @@ matchhtcap(Pcidev *p, int cap, int off, int arg)
 int
 pcicap(Pcidev *p, int cap)
 {
-	return enumcaps(p, matchcap, cap);
+	return pcienumcaps(p, matchcap, cap);
 }
 
 int
 pcihtcap(Pcidev *p, int cap)
 {
-	return enumcaps(p, matchhtcap, cap);
+	return pcienumcaps(p, matchhtcap, cap);
 }
 
 static int
diff --git a/sys/src/9/port/pci.h b/sys/src/9/port/pci.h
index 7d4acb2f8..1e9eac508 100644
--- a/sys/src/9/port/pci.h
+++ b/sys/src/9/port/pci.h
@@ -254,6 +254,7 @@ extern void pciclrmwi(Pcidev* p);
 
 extern int pcicap(Pcidev *p, int cap);
 extern int pcihtcap(Pcidev *p, int cap);
+extern int pcienumcaps(Pcidev *p, int (*fmatch)(Pcidev*, int, int, int), int arg);
 
 extern int pcimsienable(Pcidev *p, uvlong addr, ulong data);
 extern int pcimsidisable(Pcidev *p);