Patchwork [03/10] uhci: make bandwidth tunable

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Submitter Gerd Hoffmann
Date May 25, 2012, 9:44 a.m.
Message ID <1337939061-13629-4-git-send-email-kraxel@redhat.com>
Download mbox | patch
Permalink /patch/161263/
State New
Headers show

Comments

Gerd Hoffmann - May 25, 2012, 9:44 a.m.
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 |    6 ++++--
 1 files changed, 4 insertions(+), 2 deletions(-)

Patch

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 @@  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(),
 };