xhci: Log extra info on "ERROR Transfer event TRB DMA ptr not part of current TD"
Lately (with the use of uas / bulk-streams) we have been seeing several
cases where this error triggers (which should never happen).
Add some extra logging to make debugging these errors easier.
Signed-off-by: Hans de Goede <hdegoede@redhat.com>
Signed-off-by: Mathias Nyman <mathias.nyman@linux.intel.com>
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
diff --git a/drivers/usb/host/xhci-mem.c b/drivers/usb/host/xhci-mem.c
index 8936211..5cb3d7a 100644
--- a/drivers/usb/host/xhci-mem.c
+++ b/drivers/usb/host/xhci-mem.c
@@ -1904,7 +1904,7 @@
start_dma = xhci_trb_virt_to_dma(input_seg, start_trb);
end_dma = xhci_trb_virt_to_dma(input_seg, end_trb);
- seg = trb_in_td(input_seg, start_trb, end_trb, input_dma);
+ seg = trb_in_td(xhci, input_seg, start_trb, end_trb, input_dma, false);
if (seg != result_seg) {
xhci_warn(xhci, "WARN: %s TRB math test %d failed!\n",
test_name, test_number);
@@ -1918,6 +1918,8 @@
end_trb, end_dma);
xhci_warn(xhci, "Expected seg %p, got seg %p\n",
result_seg, seg);
+ trb_in_td(xhci, input_seg, start_trb, end_trb, input_dma,
+ true);
return -1;
}
return 0;
diff --git a/drivers/usb/host/xhci-ring.c b/drivers/usb/host/xhci-ring.c
index 4e1c34f..bc6fcbc 100644
--- a/drivers/usb/host/xhci-ring.c
+++ b/drivers/usb/host/xhci-ring.c
@@ -1660,10 +1660,12 @@
* TRB in this TD, this function returns that TRB's segment. Otherwise it
* returns 0.
*/
-struct xhci_segment *trb_in_td(struct xhci_segment *start_seg,
+struct xhci_segment *trb_in_td(struct xhci_hcd *xhci,
+ struct xhci_segment *start_seg,
union xhci_trb *start_trb,
union xhci_trb *end_trb,
- dma_addr_t suspect_dma)
+ dma_addr_t suspect_dma,
+ bool debug)
{
dma_addr_t start_dma;
dma_addr_t end_seg_dma;
@@ -1682,6 +1684,15 @@
/* If the end TRB isn't in this segment, this is set to 0 */
end_trb_dma = xhci_trb_virt_to_dma(cur_seg, end_trb);
+ if (debug)
+ xhci_warn(xhci,
+ "Looking for event-dma %016llx trb-start %016llx trb-end %016llx seg-start %016llx seg-end %016llx\n",
+ (unsigned long long)suspect_dma,
+ (unsigned long long)start_dma,
+ (unsigned long long)end_trb_dma,
+ (unsigned long long)cur_seg->dma,
+ (unsigned long long)end_seg_dma);
+
if (end_trb_dma > 0) {
/* The end TRB is in this segment, so suspect should be here */
if (start_dma <= end_trb_dma) {
@@ -2414,8 +2425,8 @@
td_num--;
/* Is this a TRB in the currently executing TD? */
- event_seg = trb_in_td(ep_ring->deq_seg, ep_ring->dequeue,
- td->last_trb, event_dma);
+ event_seg = trb_in_td(xhci, ep_ring->deq_seg, ep_ring->dequeue,
+ td->last_trb, event_dma, false);
/*
* Skip the Force Stopped Event. The event_trb(event_dma) of FSE
@@ -2447,7 +2458,12 @@
/* HC is busted, give up! */
xhci_err(xhci,
"ERROR Transfer event TRB DMA ptr not "
- "part of current TD\n");
+ "part of current TD ep_index %d "
+ "comp_code %u\n", ep_index,
+ trb_comp_code);
+ trb_in_td(xhci, ep_ring->deq_seg,
+ ep_ring->dequeue, td->last_trb,
+ event_dma, true);
return -ESHUTDOWN;
}
diff --git a/drivers/usb/host/xhci.h b/drivers/usb/host/xhci.h
index f4d12f6f..276fd8e 100644
--- a/drivers/usb/host/xhci.h
+++ b/drivers/usb/host/xhci.h
@@ -1804,9 +1804,9 @@
/* xHCI ring, segment, TRB, and TD functions */
dma_addr_t xhci_trb_virt_to_dma(struct xhci_segment *seg, union xhci_trb *trb);
-struct xhci_segment *trb_in_td(struct xhci_segment *start_seg,
- union xhci_trb *start_trb, union xhci_trb *end_trb,
- dma_addr_t suspect_dma);
+struct xhci_segment *trb_in_td(struct xhci_hcd *xhci,
+ struct xhci_segment *start_seg, union xhci_trb *start_trb,
+ union xhci_trb *end_trb, dma_addr_t suspect_dma, bool debug);
int xhci_is_vendor_info_code(struct xhci_hcd *xhci, unsigned int trb_comp_code);
void xhci_ring_cmd_db(struct xhci_hcd *xhci);
int xhci_queue_slot_control(struct xhci_hcd *xhci, struct xhci_command *cmd,