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Diffstat (limited to 'drivers/usb/host/xhci.h')
-rw-r--r--drivers/usb/host/xhci.h22
1 files changed, 22 insertions, 0 deletions
diff --git a/drivers/usb/host/xhci.h b/drivers/usb/host/xhci.h
index af3c5638526c..c92f84154fb5 100644
--- a/drivers/usb/host/xhci.h
+++ b/drivers/usb/host/xhci.h
@@ -659,6 +659,10 @@ struct xhci_virt_ep {
/* The TRB that was last reported in a stopped endpoint ring */
union xhci_trb *stopped_trb;
struct xhci_td *stopped_td;
+ /* Watchdog timer for stop endpoint command to cancel URBs */
+ struct timer_list stop_cmd_timer;
+ int stop_cmds_pending;
+ struct xhci_hcd *xhci;
};
struct xhci_virt_device {
@@ -1022,6 +1026,8 @@ struct xhci_scratchpad {
#define ERST_ENTRIES 1
/* Poll every 60 seconds */
#define POLL_TIMEOUT 60
+/* Stop endpoint command timeout (secs) for URB cancellation watchdog timer */
+#define XHCI_STOP_EP_CMD_TIMEOUT 5
/* XXX: Make these module parameters */
@@ -1083,6 +1089,21 @@ struct xhci_hcd {
struct timer_list event_ring_timer;
int zombie;
#endif
+ /* Host controller watchdog timer structures */
+ unsigned int xhc_state;
+/* Host controller is dying - not responding to commands. "I'm not dead yet!"
+ *
+ * xHC interrupts have been disabled and a watchdog timer will (or has already)
+ * halt the xHCI host, and complete all URBs with an -ESHUTDOWN code. Any code
+ * that sees this status (other than the timer that set it) should stop touching
+ * hardware immediately. Interrupt handlers should return immediately when
+ * they see this status (any time they drop and re-acquire xhci->lock).
+ * xhci_urb_dequeue() should call usb_hcd_check_unlink_urb() and return without
+ * putting the TD on the canceled list, etc.
+ *
+ * There are no reports of xHCI host controllers that display this issue.
+ */
+#define XHCI_STATE_DYING (1 << 0)
/* Statistics */
int noops_submitted;
int noops_handled;
@@ -1279,6 +1300,7 @@ void xhci_cleanup_stalled_ring(struct xhci_hcd *xhci,
void xhci_queue_config_ep_quirk(struct xhci_hcd *xhci,
unsigned int slot_id, unsigned int ep_index,
struct xhci_dequeue_state *deq_state);
+void xhci_stop_endpoint_command_watchdog(unsigned long arg);
/* xHCI roothub code */
int xhci_hub_control(struct usb_hcd *hcd, u16 typeReq, u16 wValue, u16 wIndex,
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