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usb: add shortcut for control transfers

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Add a more direct code path to submit control transfers.  Instead of
feeding three usb packets (setup, data, ack) to usb_handle_packet and
have the do_token_* functions in usb.c poke the control transfer
parameters out of it just submit a single packet carrying the actual
data with the control xfer parameters filled into USBPacket->parameters.

Signed-off-by: Gerd Hoffmann <kraxel@redhat.com>
This commit is contained in:
Gerd Hoffmann 2012-03-02 13:22:29 +01:00
parent 9424d4e7c6
commit 1b4b29a114
2 changed files with 60 additions and 0 deletions
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hw/usb.h
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@ -327,6 +327,7 @@ struct USBPacket {
int pid;
USBEndpoint *ep;
QEMUIOVector iov;
uint64_t parameter; /* control transfers */
int result; /* transfer length or USB_RET_* status code */
/* Internal use by the USB layer. */
USBPacketState state;