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usb: Move short-not-ok handling to the core

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After a short-not-ok packet ending short, we should not advance the queue.
Move enforcing this to the core, rather then handling it in the hcd code.

This may result in the queue now actually containing multiple input packets
(which would not happen before), and this requires special handling in
combination with pipelining, so disable pipleining for input endpoints
(for now).

Signed-off-by: Hans de Goede <hdegoede@redhat.com>
Signed-off-by: Gerd Hoffmann <kraxel@redhat.com>
This commit is contained in:
Hans de Goede 2012-10-24 18:14:09 +02:00 • committed by Gerd Hoffmann
parent 0cae7b1a00
commit 6ba43f1f6b
9 changed files with 33 additions and 22 deletions
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7
hw/usb/hcd-uhci.c
View file

@ -808,6 +808,7 @@ static int uhci_handle_td(UHCIState *s, uint32_t addr, UHCI_TD *td,
UHCIAsync *async;
int len = 0, max_len;
uint8_t pid;
bool spd;
USBDevice *dev;
USBEndpoint *ep;
@ -852,13 +853,14 @@ static int uhci_handle_td(UHCIState *s, uint32_t addr, UHCI_TD *td,
max_len = ((td->token >> 21) + 1) & 0x7ff;
pid = td->token & 0xff;
spd = (pid == USB_TOKEN_IN && (td->ctrl & TD_CTRL_SPD) != 0);
dev = uhci_find_device(s, (td->token >> 8) & 0x7f);
ep = usb_ep_get(dev, pid, (td->token >> 15) & 0xf);
if (ep_ret) {
*ep_ret = ep;
}
usb_packet_setup(&async->packet, pid, ep, addr);
usb_packet_setup(&async->packet, pid, ep, addr, spd);
qemu_sglist_add(&async->sgl, td->buffer, max_len);
usb_packet_map(&async->packet, &async->sgl);
@ -985,8 +987,7 @@ static void uhci_fill_queue(UHCIState *s, UHCI_TD *td, struct USBEndpoint *ep)
UHCI_TD ptd;
int ret;
ptd.ctrl = td->ctrl;
while (is_valid(plink) && !(ptd.ctrl & TD_CTRL_SPD)) {
while (is_valid(plink)) {
pci_dma_read(&s->dev, plink & ~0xf, &ptd, sizeof(ptd));
le32_to_cpus(&ptd.link);
le32_to_cpus(&ptd.ctrl);