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>
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@ -171,6 +171,7 @@ struct UHCIState {
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/* Properties */
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/* Properties */
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char *masterbus;
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char *masterbus;
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uint32_t firstport;
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uint32_t firstport;
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uint32_t maxframes;
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};
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};
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typedef struct UHCI_TD {
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typedef struct UHCI_TD {
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@ -1201,6 +1202,12 @@ static void uhci_frame_timer(void *opaque)
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/* Process up to MAX_FRAMES_PER_TICK frames */
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/* Process up to MAX_FRAMES_PER_TICK frames */
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frames = (t_now - t_last_run) / frame_t;
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frames = (t_now - t_last_run) / frame_t;
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if (frames > s->maxframes) {
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int skipped = frames - s->maxframes;
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s->expire_time += skipped * frame_t;
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s->frnum = (s->frnum + skipped) & 0x7ff;
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frames -= skipped;
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}
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if (frames > MAX_FRAMES_PER_TICK) {
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if (frames > MAX_FRAMES_PER_TICK) {
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frames = MAX_FRAMES_PER_TICK;
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frames = MAX_FRAMES_PER_TICK;
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}
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}
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@ -1326,6 +1333,7 @@ static Property uhci_properties[] = {
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DEFINE_PROP_STRING("masterbus", UHCIState, masterbus),
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DEFINE_PROP_STRING("masterbus", UHCIState, masterbus),
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DEFINE_PROP_UINT32("firstport", UHCIState, firstport, 0),
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DEFINE_PROP_UINT32("firstport", UHCIState, firstport, 0),
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DEFINE_PROP_UINT32("bandwidth", UHCIState, frame_bandwidth, 1280),
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DEFINE_PROP_UINT32("bandwidth", UHCIState, frame_bandwidth, 1280),
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DEFINE_PROP_UINT32("maxframes", UHCIState, maxframes, 128),
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DEFINE_PROP_END_OF_LIST(),
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DEFINE_PROP_END_OF_LIST(),
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};
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};
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