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xhci: trace debug statements for urb cancellation

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This patch defines a new trace event, which is called xhci_dbg_cancel_urb
and belongs to the event class xhci_log_msg, and adds tracepoints that
trace the debug messages related to the removal of a cancelled URB from
the endpoint's transfer ring.

Signed-off-by: Xenia Ragiadakou <burzalodowa@gmail.com>
Signed-off-by: Sarah Sharp <sarah.a.sharp@linux.intel.com>
This commit is contained in:
Xenia Ragiadakou 2013-08-14 06:33:54 +03:00 committed by Sarah Sharp
parent 63a23b9a74
commit aa50b29061
3 changed files with 54 additions and 28 deletions
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64
drivers/usb/host/xhci-ring.c
View File

@ -556,7 +556,8 @@ void xhci_find_new_dequeue_state(struct xhci_hcd *xhci,
return;
}
state->new_cycle_state = 0;
xhci_dbg(xhci, "Finding segment containing stopped TRB.\n");
xhci_dbg_trace(xhci, trace_xhci_dbg_cancel_urb,
"Finding segment containing stopped TRB.");
state->new_deq_seg = find_trb_seg(cur_td->start_seg,
dev->eps[ep_index].stopped_trb,
&state->new_cycle_state);
@ -566,12 +567,14 @@ void xhci_find_new_dequeue_state(struct xhci_hcd *xhci,
}
/* Dig out the cycle state saved by the xHC during the stop ep cmd */
xhci_dbg(xhci, "Finding endpoint context\n");
xhci_dbg_trace(xhci, trace_xhci_dbg_cancel_urb,
"Finding endpoint context");
ep_ctx = xhci_get_ep_ctx(xhci, dev->out_ctx, ep_index);
state->new_cycle_state = 0x1 & le64_to_cpu(ep_ctx->deq);
state->new_deq_ptr = cur_td->last_trb;
xhci_dbg(xhci, "Finding segment containing last TRB in TD.\n");
xhci_dbg_trace(xhci, trace_xhci_dbg_cancel_urb,
"Finding segment containing last TRB in TD.");
state->new_deq_seg = find_trb_seg(state->new_deq_seg,
state->new_deq_ptr,
&state->new_cycle_state);
@ -598,13 +601,16 @@ void xhci_find_new_dequeue_state(struct xhci_hcd *xhci,
if (ep_ring->first_seg == ep_ring->first_seg->next &&
state->new_deq_ptr < dev->eps[ep_index].stopped_trb)
state->new_cycle_state ^= 0x1;
xhci_dbg(xhci, "Cycle state = 0x%x\n", state->new_cycle_state);
xhci_dbg_trace(xhci, trace_xhci_dbg_cancel_urb,
"Cycle state = 0x%x", state->new_cycle_state);
/* Don't update the ring cycle state for the producer (us). */
xhci_dbg(xhci, "New dequeue segment = %p (virtual)\n",
xhci_dbg_trace(xhci, trace_xhci_dbg_cancel_urb,
"New dequeue segment = %p (virtual)",
state->new_deq_seg);
addr = xhci_trb_virt_to_dma(state->new_deq_seg, state->new_deq_ptr);
xhci_dbg(xhci, "New dequeue pointer = 0x%llx (DMA)\n",
xhci_dbg_trace(xhci, trace_xhci_dbg_cancel_urb,
"New dequeue pointer = 0x%llx (DMA)",
(unsigned long long) addr);
}
@ -632,9 +638,11 @@ static void td_to_noop(struct xhci_hcd *xhci, struct xhci_ring *ep_ring,
if (flip_cycle)
cur_trb->generic.field[3] ^=
cpu_to_le32(TRB_CYCLE);
xhci_dbg(xhci, "Cancel (unchain) link TRB\n");
xhci_dbg(xhci, "Address = %p (0x%llx dma); "
"in seg %p (0x%llx dma)\n",
xhci_dbg_trace(xhci, trace_xhci_dbg_cancel_urb,
"Cancel (unchain) link TRB");
xhci_dbg_trace(xhci, trace_xhci_dbg_cancel_urb,
"Address = %p (0x%llx dma); "
"in seg %p (0x%llx dma)",
cur_trb,
(unsigned long long)xhci_trb_virt_to_dma(cur_seg, cur_trb),
cur_seg,
@ -652,7 +660,8 @@ static void td_to_noop(struct xhci_hcd *xhci, struct xhci_ring *ep_ring,
cpu_to_le32(TRB_CYCLE);
cur_trb->generic.field[3] |= cpu_to_le32(
TRB_TYPE(TRB_TR_NOOP));
xhci_dbg(xhci, "TRB to noop at offset 0x%llx\n",
xhci_dbg_trace(xhci, trace_xhci_dbg_cancel_urb,
"TRB to noop at offset 0x%llx",
(unsigned long long)
xhci_trb_virt_to_dma(cur_seg, cur_trb));
}
@ -673,8 +682,9 @@ void xhci_queue_new_dequeue_state(struct xhci_hcd *xhci,
{
struct xhci_virt_ep *ep = &xhci->devs[slot_id]->eps[ep_index];
xhci_dbg(xhci, "Set TR Deq Ptr cmd, new deq seg = %p (0x%llx dma), "
"new deq ptr = %p (0x%llx dma), new cycle = %u\n",
xhci_dbg_trace(xhci, trace_xhci_dbg_cancel_urb,
"Set TR Deq Ptr cmd, new deq seg = %p (0x%llx dma), "
"new deq ptr = %p (0x%llx dma), new cycle = %u",
deq_state->new_deq_seg,
(unsigned long long)deq_state->new_deq_seg->dma,
deq_state->new_deq_ptr,
@ -794,7 +804,8 @@ static void handle_stopped_endpoint(struct xhci_hcd *xhci,
*/
list_for_each(entry, &ep->cancelled_td_list) {
cur_td = list_entry(entry, struct xhci_td, cancelled_td_list);
xhci_dbg(xhci, "Removing canceled TD starting at 0x%llx (dma).\n",
xhci_dbg_trace(xhci, trace_xhci_dbg_cancel_urb,
"Removing canceled TD starting at 0x%llx (dma).",
(unsigned long long)xhci_trb_virt_to_dma(
cur_td->start_seg, cur_td->first_trb));
ep_ring = xhci_urb_to_transfer_ring(xhci, cur_td->urb);
@ -914,14 +925,16 @@ void xhci_stop_endpoint_command_watchdog(unsigned long arg)
ep->stop_cmds_pending--;
if (xhci->xhc_state & XHCI_STATE_DYING) {
xhci_dbg(xhci, "Stop EP timer ran, but another timer marked "
"xHCI as DYING, exiting.\n");
xhci_dbg_trace(xhci, trace_xhci_dbg_cancel_urb,
"Stop EP timer ran, but another timer marked "
"xHCI as DYING, exiting.");
spin_unlock_irqrestore(&xhci->lock, flags);
return;
}
if (!(ep->stop_cmds_pending == 0 && (ep->ep_state & EP_HALT_PENDING))) {
xhci_dbg(xhci, "Stop EP timer ran, but no command pending, "
"exiting.\n");
xhci_dbg_trace(xhci, trace_xhci_dbg_cancel_urb,
"Stop EP timer ran, but no command pending, "
"exiting.");
spin_unlock_irqrestore(&xhci->lock, flags);
return;
}
@ -963,8 +976,9 @@ void xhci_stop_endpoint_command_watchdog(unsigned long arg)
ring = temp_ep->ring;
if (!ring)
continue;
xhci_dbg(xhci, "Killing URBs for slot ID %u, "
"ep index %u\n", i, j);
xhci_dbg_trace(xhci, trace_xhci_dbg_cancel_urb,
"Killing URBs for slot ID %u, "
"ep index %u", i, j);
while (!list_empty(&ring->td_list)) {
cur_td = list_first_entry(&ring->td_list,
struct xhci_td,
@ -987,9 +1001,11 @@ void xhci_stop_endpoint_command_watchdog(unsigned long arg)
}
}
spin_unlock_irqrestore(&xhci->lock, flags);
xhci_dbg(xhci, "Calling usb_hc_died()\n");
xhci_dbg_trace(xhci, trace_xhci_dbg_cancel_urb,
"Calling usb_hc_died()");
usb_hc_died(xhci_to_hcd(xhci)->primary_hcd);
xhci_dbg(xhci, "xHCI host controller is dead.\n");
xhci_dbg_trace(xhci, trace_xhci_dbg_cancel_urb,
"xHCI host controller is dead.");
}
@ -1093,7 +1109,8 @@ static void handle_set_deq_completion(struct xhci_hcd *xhci,
ep_state &= EP_STATE_MASK;
slot_state = le32_to_cpu(slot_ctx->dev_state);
slot_state = GET_SLOT_STATE(slot_state);
xhci_dbg(xhci, "Slot state = %u, EP state = %u\n",
xhci_dbg_trace(xhci, trace_xhci_dbg_cancel_urb,
"Slot state = %u, EP state = %u",
slot_state, ep_state);
break;
case COMP_EBADSLT:
@ -1113,7 +1130,8 @@ static void handle_set_deq_completion(struct xhci_hcd *xhci,
* cancelling URBs, which might not be an error...
*/
} else {
xhci_dbg(xhci, "Successful Set TR Deq Ptr cmd, deq = @%08llx\n",
xhci_dbg_trace(xhci, trace_xhci_dbg_cancel_urb,
"Successful Set TR Deq Ptr cmd, deq = @%08llx",
le64_to_cpu(ep_ctx->deq));
if (xhci_trb_virt_to_dma(dev->eps[ep_index].queued_deq_seg,
dev->eps[ep_index].queued_deq_ptr) ==

5
drivers/usb/host/xhci-trace.h
View File

@ -52,6 +52,11 @@ DEFINE_EVENT(xhci_log_msg, xhci_dbg_reset_ep,
TP_ARGS(vaf)
);
DEFINE_EVENT(xhci_log_msg, xhci_dbg_cancel_urb,
TP_PROTO(struct va_format *vaf),
TP_ARGS(vaf)
);
DECLARE_EVENT_CLASS(xhci_log_ctx,
TP_PROTO(struct xhci_hcd *xhci, struct xhci_container_ctx *ctx,
unsigned int ep_num),

13
drivers/usb/host/xhci.c
View File

@ -1434,7 +1434,8 @@ int xhci_urb_dequeue(struct usb_hcd *hcd, struct urb *urb, int status)
goto done;
temp = xhci_readl(xhci, &xhci->op_regs->status);
if (temp == 0xffffffff || (xhci->xhc_state & XHCI_STATE_HALTED)) {
xhci_dbg(xhci, "HW died, freeing TD.\n");
xhci_dbg_trace(xhci, trace_xhci_dbg_cancel_urb,
"HW died, freeing TD.");
urb_priv = urb->hcpriv;
for (i = urb_priv->td_cnt; i < urb_priv->length; i++) {
td = urb_priv->td[i];
@ -1452,8 +1453,9 @@ int xhci_urb_dequeue(struct usb_hcd *hcd, struct urb *urb, int status)
}
if ((xhci->xhc_state & XHCI_STATE_DYING) ||
(xhci->xhc_state & XHCI_STATE_HALTED)) {
xhci_dbg(xhci, "Ep 0x%x: URB %p to be canceled on "
"non-responsive xHCI host.\n",
xhci_dbg_trace(xhci, trace_xhci_dbg_cancel_urb,
"Ep 0x%x: URB %p to be canceled on "
"non-responsive xHCI host.",
urb->ep->desc.bEndpointAddress, urb);
/* Let the stop endpoint command watchdog timer (which set this
* state) finish cleaning up the endpoint TD lists. We must
@ -1474,8 +1476,9 @@ int xhci_urb_dequeue(struct usb_hcd *hcd, struct urb *urb, int status)
urb_priv = urb->hcpriv;
i = urb_priv->td_cnt;
if (i < urb_priv->length)
xhci_dbg(xhci, "Cancel URB %p, dev %s, ep 0x%x, "
"starting at offset 0x%llx\n",
xhci_dbg_trace(xhci, trace_xhci_dbg_cancel_urb,
"Cancel URB %p, dev %s, ep 0x%x, "
"starting at offset 0x%llx",
urb, urb->dev->devpath,
urb->ep->desc.bEndpointAddress,
(unsigned long long) xhci_trb_virt_to_dma(