commit 40141d12de84b67528354ec88075f66f5afd0cc7
author Gerd Hoffmann <kraxel@redhat.com> Fri May 11 10:02:53 2012 +0200
committer Gerd Hoffmann <kraxel@redhat.com> Thu Jun 07 10:02:20 2012 +0200
tree b2764bc4e8d2bf0ac9a02bb44b6534a51b16622c
parent 9a16c5950d9ce38671a1ac259dcde3e707767922

uhci: make bandwidth tunable

Add a property for the uhci bandwidth.  Can be used to make uhci
emulation run faster than real hardware.

Signed-off-by: Gerd Hoffmann <kraxel@redhat.com>

hw/usb/hcd-uhci.c

diff --git a/hw/usb/hcd-uhci.c b/hw/usb/hcd-uhci.c
index 91bcc7e..2e7c8f9 100644
--- a/hw/usb/hcd-uhci.c
+++ b/hw/usb/hcd-uhci.c
@@ -133,6 +133,7 @@
     QEMUTimer *frame_timer;
     QEMUBH *bh;
     uint32_t frame_bytes;
+    uint32_t frame_bandwidth;
     UHCIPort ports[NB_PORTS];
 
     /* Interrupts that should be raised at the end of the current frame.  */
@@ -908,7 +909,7 @@
         uhci_async_free(async);
     } else {
         async->done = 1;
-        if (s->frame_bytes < 1280) {
+        if (s->frame_bytes < s->frame_bandwidth) {
             qemu_bh_schedule(s->bh);
         }
     }
@@ -1007,7 +1008,7 @@
     qhdb_reset(&qhdb);
 
     for (cnt = FRAME_MAX_LOOPS; is_valid(link) && cnt; cnt--) {
-        if (s->frame_bytes >= 1280) {
+        if (s->frame_bytes >= s->frame_bandwidth) {
             /* We've reached the usb 1.1 bandwidth, which is
                1280 bytes/frame, stop processing */
             trace_usb_uhci_frame_stop_bandwidth();
@@ -1258,6 +1259,7 @@
 static Property uhci_properties[] = {
     DEFINE_PROP_STRING("masterbus", UHCIState, masterbus),
     DEFINE_PROP_UINT32("firstport", UHCIState, firstport, 0),
+    DEFINE_PROP_UINT32("bandwidth", UHCIState, frame_bandwidth, 1280),
     DEFINE_PROP_END_OF_LIST(),
 };