svn commit: r253379 - stable/9/sys/dev/usb/controller

[Konstantin Belousov]

Author: kib
Date: Tue Jul 16 06:50:22 2013
New Revision: 253379
URL: http://svnweb.freebsd.org/changeset/base/253379

Log:
  MFC r253094:
  Use MSI for xhci(4), if supported.
  
  Approved by:	re (delphij)

Modified:
  stable/9/sys/dev/usb/controller/xhci.h
  stable/9/sys/dev/usb/controller/xhci_pci.c
Directory Properties:
  stable/9/sys/   (props changed)
  stable/9/sys/dev/   (props changed)

Modified: stable/9/sys/dev/usb/controller/xhci.h
==============================================================================
--- stable/9/sys/dev/usb/controller/xhci.h	Tue Jul 16 06:43:37 2013	(r253378)
+++ stable/9/sys/dev/usb/controller/xhci.h	Tue Jul 16 06:50:22 2013	(r253379)
@@ -436,6 +436,7 @@ struct xhci_softc {
 
 	struct usb_device	*sc_devices[XHCI_MAX_DEVICES];
 	struct resource		*sc_io_res;
+	int			sc_irq_rid;
 	struct resource		*sc_irq_res;
 
 	void			*sc_intr_hdl;

Modified: stable/9/sys/dev/usb/controller/xhci_pci.c
==============================================================================
--- stable/9/sys/dev/usb/controller/xhci_pci.c	Tue Jul 16 06:43:37 2013	(r253378)
+++ stable/9/sys/dev/usb/controller/xhci_pci.c	Tue Jul 16 06:50:22 2013	(r253379)
@@ -136,8 +136,7 @@ static int
 xhci_pci_attach(device_t self)
 {
 	struct xhci_softc *sc = device_get_softc(self);
-	int err;
-	int rid;
+	int count, err, rid;
 
 	/* XXX check for 64-bit capability */
 
@@ -159,9 +158,18 @@ xhci_pci_attach(device_t self)
 	sc->sc_io_hdl = rman_get_bushandle(sc->sc_io_res);
 	sc->sc_io_size = rman_get_size(sc->sc_io_res);
 
-	rid = 0;
-	sc->sc_irq_res = bus_alloc_resource_any(self, SYS_RES_IRQ, &rid,
-	    RF_SHAREABLE | RF_ACTIVE);
+	sc->sc_irq_rid = 0;
+	count = pci_msi_count(self);
+	if (count >= 1) {
+		count = 1;
+		if (pci_alloc_msi(self, &count) == 0) {
+			if (bootverbose)
+				device_printf(self, "MSI enabled\n");
+			sc->sc_irq_rid = 1;
+		}
+	}
+	sc->sc_irq_res = bus_alloc_resource_any(self, SYS_RES_IRQ,
+	    &sc->sc_irq_rid, RF_SHAREABLE | RF_ACTIVE);
 	if (sc->sc_irq_res == NULL) {
 		device_printf(self, "Could not allocate IRQ\n");
 		goto error;
@@ -232,7 +240,10 @@ xhci_pci_detach(device_t self)
 		sc->sc_intr_hdl = NULL;
 	}
 	if (sc->sc_irq_res) {
-		bus_release_resource(self, SYS_RES_IRQ, 0, sc->sc_irq_res);
+		if (sc->sc_irq_rid == 1)
+			pci_release_msi(self);
+		bus_release_resource(self, SYS_RES_IRQ, sc->sc_irq_rid,
+		    sc->sc_irq_res);
 		sc->sc_irq_res = NULL;
 	}
 	if (sc->sc_io_res) {