From b296bb59f2c9e56bc2ba5fadc53ab53c54ccbc4b Mon Sep 17 00:00:00 2001
From: Gerd Hoffmann <kraxel@redhat.com>
Date: Thu, 30 Aug 2012 10:57:12 +0200
Subject: [PATCH] xhci: fix & cleanup msi.

Drop custom write_config function which isn't needed any more.
Make the msi property a bit property so it accepts 'on' & 'off'.
Enable MSI by default.

TODO: add compat property to disable on old machine types.

Signed-off-by: Gerd Hoffmann <kraxel@redhat.com>
---
 hw/usb/hcd-xhci.c | 27 +++++++++------------------
 1 file changed, 9 insertions(+), 18 deletions(-)

diff --git a/hw/usb/hcd-xhci.c b/hw/usb/hcd-xhci.c
index 642e8e5..ff74ed9 100644
--- a/hw/usb/hcd-xhci.c
+++ b/hw/usb/hcd-xhci.c
@@ -386,7 +386,7 @@ struct XHCIState {
     /* properties */
     uint32_t numports_2;
     uint32_t numports_3;
-    uint32_t msi;
+    uint32_t flags;
 
     /* Operational Registers */
     uint32_t usbcmd;
@@ -435,6 +435,10 @@ typedef struct XHCIEvRingSeg {
     uint32_t rsvd;
 } XHCIEvRingSeg;
 
+enum xhci_flags {
+    XHCI_FLAG_USE_MSI = 1,
+};
+
 static void xhci_kick_ep(XHCIState *xhci, unsigned int slotid,
                          unsigned int epid);
 static void xhci_event(XHCIState *xhci, XHCIEvent *event);
@@ -617,7 +621,7 @@ static void xhci_irq_update(XHCIState *xhci)
         level = 1;
     }
 
-    if (xhci->msi && msi_enabled(&xhci->pci_dev)) {
+    if (msi_enabled(&xhci->pci_dev)) {
         if (level) {
             trace_usb_xhci_irq_msi(0);
             msi_notify(&xhci->pci_dev, 0);
@@ -2859,32 +2863,20 @@ static int usb_xhci_initfn(struct PCIDevice *dev)
     ret = pcie_cap_init(&xhci->pci_dev, 0xa0, PCI_EXP_TYPE_ENDPOINT, 0);
     assert(ret >= 0);
 
-    if (xhci->msi) {
-        ret = msi_init(&xhci->pci_dev, 0x70, 1, true, false);
-        assert(ret >= 0);
+    if (xhci->flags & (1 << XHCI_FLAG_USE_MSI)) {
+        msi_init(&xhci->pci_dev, 0x70, MAXINTRS, true, false);
     }
 
     return 0;
 }
 
-static void xhci_write_config(PCIDevice *dev, uint32_t addr, uint32_t val,
-                              int len)
-{
-    XHCIState *xhci = DO_UPCAST(XHCIState, pci_dev, dev);
-
-    pci_default_write_config(dev, addr, val, len);
-    if (xhci->msi) {
-        msi_write_config(dev, addr, val, len);
-    }
-}
-
 static const VMStateDescription vmstate_xhci = {
     .name = "xhci",
     .unmigratable = 1,
 };
 
 static Property xhci_properties[] = {
-    DEFINE_PROP_UINT32("msi", XHCIState, msi, 0),
+    DEFINE_PROP_BIT("msi",    XHCIState, flags, XHCI_FLAG_USE_MSI, true),
     DEFINE_PROP_UINT32("p2",  XHCIState, numports_2, 4),
     DEFINE_PROP_UINT32("p3",  XHCIState, numports_3, 4),
     DEFINE_PROP_END_OF_LIST(),
@@ -2904,7 +2896,6 @@ static void xhci_class_init(ObjectClass *klass, void *data)
     k->class_id     = PCI_CLASS_SERIAL_USB;
     k->revision     = 0x03;
     k->is_express   = 1;
-    k->config_write = xhci_write_config;
 }
 
 static TypeInfo xhci_info = {