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From: Konstantin Belousov <kib@FreeBSD.org>
Date: Sat, 9 Jul 2011 14:30:13 +0000 (UTC)
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Subject: svn commit: r223885 - head/sys/dev/pci
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Author: kib
Date: Sat Jul  9 14:30:13 2011
New Revision: 223885
URL: http://svn.freebsd.org/changeset/base/223885

Log:
  Implement pci_find_class(9), the function to find a pci device by its class.
  
  Sponsored by:	The FreeBSD Foundation
  Reviewed by:	jhb
  MFC after:	1 week

Modified:
  head/sys/dev/pci/pci.c
  head/sys/dev/pci/pcivar.h

Modified: head/sys/dev/pci/pci.c
==============================================================================
--- head/sys/dev/pci/pci.c	Sat Jul  9 14:29:23 2011	(r223884)
+++ head/sys/dev/pci/pci.c	Sat Jul  9 14:30:13 2011	(r223885)
@@ -347,6 +347,21 @@ pci_find_device(uint16_t vendor, uint16_
 	return (NULL);
 }
 
+device_t
+pci_find_class(uint8_t class, uint8_t subclass)
+{
+	struct pci_devinfo *dinfo;
+
+	STAILQ_FOREACH(dinfo, &pci_devq, pci_links) {
+		if (dinfo->cfg.baseclass == class &&
+		    dinfo->cfg.subclass == subclass) {
+			return (dinfo->cfg.dev);
+		}
+	}
+
+	return (NULL);
+}
+
 static int
 pci_printf(pcicfgregs *cfg, const char *fmt, ...)
 {

Modified: head/sys/dev/pci/pcivar.h
==============================================================================
--- head/sys/dev/pci/pcivar.h	Sat Jul  9 14:29:23 2011	(r223884)
+++ head/sys/dev/pci/pcivar.h	Sat Jul  9 14:30:13 2011	(r223885)
@@ -457,6 +457,7 @@ pci_msix_count(device_t dev)
 device_t pci_find_bsf(uint8_t, uint8_t, uint8_t);
 device_t pci_find_dbsf(uint32_t, uint8_t, uint8_t, uint8_t);
 device_t pci_find_device(uint16_t, uint16_t);
+device_t pci_find_class(uint8_t class, uint8_t subclass);
 
 /* Can be used by drivers to manage the MSI-X table. */
 int	pci_pending_msix(device_t dev, u_int index);