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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>
This commit is contained in:
Gerd Hoffmann 2012-05-11 10:02:53 +02:00
parent 9a16c5950d
commit 40141d12de
1 changed files with 4 additions and 2 deletions
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6
hw/usb/hcd-uhci.c
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@ -133,6 +133,7 @@ struct UHCIState {
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 @@ static void uhci_async_complete(USBPort *port, USBPacket *packet)
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 @@ static void uhci_process_frame(UHCIState *s)
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 int usb_uhci_exit(PCIDevice *dev)
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(),
};