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authorGerd Hoffmann <kraxel@redhat.com>2012-01-27 17:27:31 +0100
committerGerd Hoffmann <kraxel@redhat.com>2012-02-27 11:13:27 +0100
commit5a248289a8db9e5c872435757165e086d42bece1 (patch)
treef11a5abd915aab2005099be004f67157b1544143 /hw
parent971a5a406ed3631797a6c83e47f6fc2e7d410f8f (diff)
usb-uhci: implement packet queuing
When a usb device is busy processing a packet (and returns USB_RET_ASYNC), continue walking the transfer descriptor list and process them to fill the request queue. Signed-off-by: Gerd Hoffmann <kraxel@redhat.com>
Diffstat (limited to 'hw')
-rw-r--r--hw/usb-uhci.c33
1 files changed, 31 insertions, 2 deletions
diff --git a/hw/usb-uhci.c b/hw/usb-uhci.c
index 13298aada..70e388132 100644
--- a/hw/usb-uhci.c
+++ b/hw/usb-uhci.c
@@ -942,6 +942,34 @@ static int qhdb_insert(QhDb *db, uint32_t addr)
return 0;
}
+static void uhci_fill_queue(UHCIState *s, UHCI_TD *td)
+{
+ uint32_t int_mask = 0;
+ uint32_t plink = td->link;
+ uint32_t token = uhci_queue_token(td);
+ UHCI_TD ptd;
+ int ret;
+
+ fprintf(stderr, "%s: -- %x\n", __func__, token);
+ while (is_valid(plink)) {
+ pci_dma_read(&s->dev, plink & ~0xf, &ptd, sizeof(ptd));
+ le32_to_cpus(&ptd.link);
+ le32_to_cpus(&ptd.ctrl);
+ le32_to_cpus(&ptd.token);
+ le32_to_cpus(&ptd.buffer);
+ if (!(ptd.ctrl & TD_CTRL_ACTIVE)) {
+ break;
+ }
+ if (uhci_queue_token(&ptd) != token) {
+ break;
+ }
+ ret = uhci_handle_td(s, plink, &ptd, &int_mask);
+ assert(ret == 2); /* got USB_RET_ASYNC */
+ assert(int_mask == 0);
+ plink = ptd.link;
+ }
+}
+
static void uhci_process_frame(UHCIState *s)
{
uint32_t frame_addr, link, old_td_ctrl, val, int_mask;
@@ -1044,8 +1072,9 @@ static void uhci_process_frame(UHCIState *s)
DPRINTF("uhci: TD 0x%x async. "
"link 0x%x ctrl 0x%x token 0x%x qh 0x%x\n",
link, td.link, td.ctrl, td.token, curr_qh);
- fprintf(stderr, "async td: link %x%s\n",
- td.link, is_valid(td.link) ? " valid" : "");
+ if (is_valid(td.link)) {
+ uhci_fill_queue(s, &td);
+ }
link = curr_qh ? qh.link : td.link;
continue;