diff options
| author | Hans de Goede <hdegoede@redhat.com> | 2012-12-14 14:35:37 +0100 |
|---|---|---|
| committer | Gerd Hoffmann <kraxel@redhat.com> | 2013-01-07 12:57:24 +0100 |
| commit | 9fdf70272702095f57efc51a80c79493fd0829b8 (patch) | |
| tree | b1c21d643256d2e8317d3843f3b9923e0f4193ba /hw/usb | |
| parent | f8f48b6957bf182339495e6be429f7bdc7ef1981 (diff) | |
uhci: Maximize how many frames we catch up when behind
If somehow we've gotten behind a lot, simply skip ahead, like the ehci code
does.
Signed-off-by: Hans de Goede <hdegoede@redhat.com>
Signed-off-by: Gerd Hoffmann <kraxel@redhat.com>
Diffstat (limited to 'hw/usb')
| -rw-r--r-- | hw/usb/hcd-uhci.c | 8 |
1 files changed, 8 insertions, 0 deletions
diff --git a/hw/usb/hcd-uhci.c b/hw/usb/hcd-uhci.c index e5c3e595f1..bd3377e36a 100644 --- a/hw/usb/hcd-uhci.c +++ b/hw/usb/hcd-uhci.c @@ -171,6 +171,7 @@ struct UHCIState { /* Properties */ char *masterbus; uint32_t firstport; + uint32_t maxframes; }; typedef struct UHCI_TD { @@ -1201,6 +1202,12 @@ static void uhci_frame_timer(void *opaque) /* Process up to MAX_FRAMES_PER_TICK frames */ frames = (t_now - t_last_run) / frame_t; + if (frames > s->maxframes) { + int skipped = frames - s->maxframes; + s->expire_time += skipped * frame_t; + s->frnum = (s->frnum + skipped) & 0x7ff; + frames -= skipped; + } if (frames > MAX_FRAMES_PER_TICK) { frames = MAX_FRAMES_PER_TICK; } @@ -1326,6 +1333,7 @@ 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_UINT32("maxframes", UHCIState, maxframes, 128), DEFINE_PROP_END_OF_LIST(), }; |