From: Xenia Ragiadakou <burzalodowa@xxxxxxxxx>
This patch creates a new event class, called xhci_log_event,
and defines the xhci_cmd_completion trace event used for
tracing the commands issued to xHC that generate a completion
event in the event ring.
This info can be used, later, to print, in a human readable
way, the completion status and flags as well as the command's
type and fields using the trace-cmd tool and the appropriate
plugin.
Also, a tracepoint is added in handle_cmd_completion().
Signed-off-by: Xenia Ragiadakou <burzalodowa@xxxxxxxxx>
Signed-off-by: Sarah Sharp <sarah.a.sharp@xxxxxxxxxxxxxxx>
---
drivers/usb/host/xhci-ring.c | 3 +++
drivers/usb/host/xhci-trace.h | 30 ++++++++++++++++++++++++++++++
2 files changed, 33 insertions(+)
diff --git a/drivers/usb/host/xhci-ring.c b/drivers/usb/host/xhci-ring.c
index 3393ce7..86971ac 100644
--- a/drivers/usb/host/xhci-ring.c
+++ b/drivers/usb/host/xhci-ring.c
@@ -1380,6 +1380,9 @@ static void handle_cmd_completion(struct xhci_hcd *xhci,
return;
}
+ trace_xhci_cmd_completion(&xhci->cmd_ring->dequeue->generic,
+ (struct xhci_generic_trb *) event);
+
if ((GET_COMP_CODE(le32_to_cpu(event->status)) == COMP_CMD_ABORT) ||
(GET_COMP_CODE(le32_to_cpu(event->status)) == COMP_CMD_STOP)) {
/* If the return value is 0, we think the trb pointed by
diff --git a/drivers/usb/host/xhci-trace.h b/drivers/usb/host/xhci-trace.h
index c653ddf..d6c2229 100644
--- a/drivers/usb/host/xhci-trace.h
+++ b/drivers/usb/host/xhci-trace.h
@@ -93,6 +93,36 @@ DEFINE_EVENT(xhci_log_ctx, xhci_address_ctx,
TP_ARGS(xhci, ctx, ep_num)
);
+DECLARE_EVENT_CLASS(xhci_log_event,
+ TP_PROTO(void *trb_va, struct xhci_generic_trb *ev),
+ TP_ARGS(trb_va, ev),
+ TP_STRUCT__entry(
+ __field(void *, va)
+ __field(u64, dma)
+ __field(u32, status)
+ __field(u32, flags)
+ __dynamic_array(__le32, trb, 4)
+ ),
+ TP_fast_assign(
+ __entry->va = trb_va;
+ __entry->dma = le64_to_cpu(((u64)ev->field[1]) << 32 |
+ ev->field[0]);
+ __entry->status = le32_to_cpu(ev->field[2]);
+ __entry->flags = le32_to_cpu(ev->field[3]);
+ memcpy(__get_dynamic_array(trb), trb_va,
+ sizeof(struct xhci_generic_trb));
+ ),
+ TP_printk("\ntrb_dma=@%llx, trb_va=@%p, status=%08x, flags=%08x",
+ (unsigned long long) __entry->dma, __entry->va,
+ __entry->status, __entry->flags
+ )
+);
+
+DEFINE_EVENT(xhci_log_event, xhci_cmd_completion,
+ TP_PROTO(void *trb_va, struct xhci_generic_trb *ev),
+ TP_ARGS(trb_va, ev)
+);
+
#endif /* __XHCI_TRACE_H */
/* this part must be outside header guard */
--
1.8.3.3
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