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path: root/drivers/usb/host/ehci-sched.c
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Diffstat (limited to 'drivers/usb/host/ehci-sched.c')
-rw-r--r--drivers/usb/host/ehci-sched.c118
1 files changed, 59 insertions, 59 deletions
diff --git a/drivers/usb/host/ehci-sched.c b/drivers/usb/host/ehci-sched.c
index f80d0330d548..85dd24ed97a6 100644
--- a/drivers/usb/host/ehci-sched.c
+++ b/drivers/usb/host/ehci-sched.c
@@ -169,7 +169,7 @@ periodic_usecs (struct ehci_hcd *ehci, unsigned frame, unsigned uframe)
break;
}
}
-#ifdef DEBUG
+#if defined(DEBUG) || defined(CONFIG_DYNAMIC_DEBUG)
if (usecs > ehci->uframe_periodic_max)
ehci_err (ehci, "uframe %d sched overrun: %d usecs\n",
frame * 8 + uframe, usecs);
@@ -327,17 +327,8 @@ static int tt_available (
periodic_tt_usecs (ehci, dev, frame, tt_usecs);
- ehci_vdbg(ehci, "tt frame %d check %d usecs start uframe %d in"
- " schedule %d/%d/%d/%d/%d/%d/%d/%d\n",
- frame, usecs, uframe,
- tt_usecs[0], tt_usecs[1], tt_usecs[2], tt_usecs[3],
- tt_usecs[4], tt_usecs[5], tt_usecs[6], tt_usecs[7]);
-
- if (max_tt_usecs[uframe] <= tt_usecs[uframe]) {
- ehci_vdbg(ehci, "frame %d uframe %d fully scheduled\n",
- frame, uframe);
+ if (max_tt_usecs[uframe] <= tt_usecs[uframe])
return 0;
- }
/* special case for isoc transfers larger than 125us:
* the first and each subsequent fully used uframe
@@ -348,13 +339,8 @@ static int tt_available (
int ufs = (usecs / 125);
int i;
for (i = uframe; i < (uframe + ufs) && i < 8; i++)
- if (0 < tt_usecs[i]) {
- ehci_vdbg(ehci,
- "multi-uframe xfer can't fit "
- "in frame %d uframe %d\n",
- frame, i);
+ if (0 < tt_usecs[i])
return 0;
- }
}
tt_usecs[uframe] += usecs;
@@ -362,12 +348,8 @@ static int tt_available (
carryover_tt_bandwidth(tt_usecs);
/* fail if the carryover pushed bw past the last uframe's limit */
- if (max_tt_usecs[7] < tt_usecs[7]) {
- ehci_vdbg(ehci,
- "tt unavailable usecs %d frame %d uframe %d\n",
- usecs, frame, uframe);
+ if (max_tt_usecs[7] < tt_usecs[7])
return 0;
- }
}
return 1;
@@ -601,12 +583,29 @@ static void qh_unlink_periodic(struct ehci_hcd *ehci, struct ehci_qh *qh)
list_del(&qh->intr_node);
}
+static void cancel_unlink_wait_intr(struct ehci_hcd *ehci, struct ehci_qh *qh)
+{
+ if (qh->qh_state != QH_STATE_LINKED ||
+ list_empty(&qh->unlink_node))
+ return;
+
+ list_del_init(&qh->unlink_node);
+
+ /*
+ * TODO: disable the event of EHCI_HRTIMER_START_UNLINK_INTR for
+ * avoiding unnecessary CPU wakeup
+ */
+}
+
static void start_unlink_intr(struct ehci_hcd *ehci, struct ehci_qh *qh)
{
/* If the QH isn't linked then there's nothing we can do. */
if (qh->qh_state != QH_STATE_LINKED)
return;
+ /* if the qh is waiting for unlink, cancel it now */
+ cancel_unlink_wait_intr(ehci, qh);
+
qh_unlink_periodic (ehci, qh);
/* Make sure the unlinks are visible before starting the timer */
@@ -632,6 +631,27 @@ static void start_unlink_intr(struct ehci_hcd *ehci, struct ehci_qh *qh)
}
}
+/*
+ * It is common only one intr URB is scheduled on one qh, and
+ * given complete() is run in tasklet context, introduce a bit
+ * delay to avoid unlink qh too early.
+ */
+static void start_unlink_intr_wait(struct ehci_hcd *ehci,
+ struct ehci_qh *qh)
+{
+ qh->unlink_cycle = ehci->intr_unlink_wait_cycle;
+
+ /* New entries go at the end of the intr_unlink_wait list */
+ list_add_tail(&qh->unlink_node, &ehci->intr_unlink_wait);
+
+ if (ehci->rh_state < EHCI_RH_RUNNING)
+ ehci_handle_start_intr_unlinks(ehci);
+ else if (ehci->intr_unlink_wait.next == &qh->unlink_node) {
+ ehci_enable_event(ehci, EHCI_HRTIMER_START_UNLINK_INTR, true);
+ ++ehci->intr_unlink_wait_cycle;
+ }
+}
+
static void end_unlink_intr(struct ehci_hcd *ehci, struct ehci_qh *qh)
{
struct ehci_qh_hw *hw = qh->hw;
@@ -889,6 +909,9 @@ static int intr_submit (
if (qh->qh_state == QH_STATE_IDLE) {
qh_refresh(ehci, qh);
qh_link_periodic(ehci, qh);
+ } else {
+ /* cancel unlink wait for the qh */
+ cancel_unlink_wait_intr(ehci, qh);
}
/* ... update usbfs periodic stats */
@@ -924,9 +947,11 @@ static void scan_intr(struct ehci_hcd *ehci)
* in qh_unlink_periodic().
*/
temp = qh_completions(ehci, qh);
- if (unlikely(temp || (list_empty(&qh->qtd_list) &&
- qh->qh_state == QH_STATE_LINKED)))
+ if (unlikely(temp))
start_unlink_intr(ehci, qh);
+ else if (unlikely(list_empty(&qh->qtd_list) &&
+ qh->qh_state == QH_STATE_LINKED))
+ start_unlink_intr_wait(ehci, qh);
}
}
}
@@ -1391,21 +1416,20 @@ iso_stream_schedule (
/* Behind the scheduling threshold? */
if (unlikely(start < next)) {
+ unsigned now2 = (now - base) & (mod - 1);
/* USB_ISO_ASAP: Round up to the first available slot */
if (urb->transfer_flags & URB_ISO_ASAP)
start += (next - start + period - 1) & -period;
/*
- * Not ASAP: Use the next slot in the stream. If
- * the entire URB falls before the threshold, fail.
+ * Not ASAP: Use the next slot in the stream,
+ * no matter what.
*/
- else if (start + span - period < next) {
- ehci_dbg(ehci, "iso urb late %p (%u+%u < %u)\n",
+ else if (start + span - period < now2) {
+ ehci_dbg(ehci, "iso underrun %p (%u+%u < %u)\n",
urb, start + base,
- span - period, next + base);
- status = -EXDEV;
- goto fail;
+ span - period, now2 + base);
}
}
@@ -1574,16 +1598,9 @@ static void itd_link_urb(
next_uframe = stream->next_uframe & (mod - 1);
- if (unlikely (list_empty(&stream->td_list))) {
+ if (unlikely (list_empty(&stream->td_list)))
ehci_to_hcd(ehci)->self.bandwidth_allocated
+= stream->bandwidth;
- ehci_vdbg (ehci,
- "schedule devp %s ep%d%s-iso period %d start %d.%d\n",
- urb->dev->devpath, stream->bEndpointAddress & 0x0f,
- (stream->bEndpointAddress & USB_DIR_IN) ? "in" : "out",
- urb->interval,
- next_uframe >> 3, next_uframe & 0x7);
- }
if (ehci_to_hcd(ehci)->self.bandwidth_isoc_reqs == 0) {
if (ehci->amd_pll_fix == 1)
@@ -1718,14 +1735,9 @@ static bool itd_complete(struct ehci_hcd *ehci, struct ehci_itd *itd)
usb_amd_quirk_pll_enable();
}
- if (unlikely(list_is_singular(&stream->td_list))) {
+ if (unlikely(list_is_singular(&stream->td_list)))
ehci_to_hcd(ehci)->self.bandwidth_allocated
-= stream->bandwidth;
- ehci_vdbg (ehci,
- "deschedule devp %s ep%d%s-iso\n",
- dev->devpath, stream->bEndpointAddress & 0x0f,
- (stream->bEndpointAddress & USB_DIR_IN) ? "in" : "out");
- }
done:
itd->urb = NULL;
@@ -1983,17 +1995,10 @@ static void sitd_link_urb(
next_uframe = stream->next_uframe;
- if (list_empty(&stream->td_list)) {
+ if (list_empty(&stream->td_list))
/* usbfs ignores TT bandwidth */
ehci_to_hcd(ehci)->self.bandwidth_allocated
+= stream->bandwidth;
- ehci_vdbg (ehci,
- "sched devp %s ep%d%s-iso [%d] %dms/%04x\n",
- urb->dev->devpath, stream->bEndpointAddress & 0x0f,
- (stream->bEndpointAddress & USB_DIR_IN) ? "in" : "out",
- (next_uframe >> 3) & (ehci->periodic_size - 1),
- stream->interval, hc32_to_cpu(ehci, stream->splits));
- }
if (ehci_to_hcd(ehci)->self.bandwidth_isoc_reqs == 0) {
if (ehci->amd_pll_fix == 1)
@@ -2107,14 +2112,9 @@ static bool sitd_complete(struct ehci_hcd *ehci, struct ehci_sitd *sitd)
usb_amd_quirk_pll_enable();
}
- if (list_is_singular(&stream->td_list)) {
+ if (list_is_singular(&stream->td_list))
ehci_to_hcd(ehci)->self.bandwidth_allocated
-= stream->bandwidth;
- ehci_vdbg (ehci,
- "deschedule devp %s ep%d%s-iso\n",
- dev->devpath, stream->bEndpointAddress & 0x0f,
- (stream->bEndpointAddress & USB_DIR_IN) ? "in" : "out");
- }
done:
sitd->urb = NULL;
generated by cgit v1.2.3 (git 2.39.0) at 2024-07-13 05:16:03 +0300