Changeset 2bff2cc2 in mainline for uspace/drv/bus/usb/xhci/trb_ring.h

Timestamp:

2018-01-18T14:00:57Z (6 years ago)

Author:

Ondřej Hlavatý <aearsis@…>

Branches:

lfn, master, serial, ticket/834-toolchain-update, topic/msim-upgrade, topic/simplify-dev-export

Children:

2c0564c

Parents:

0f79283b

git-author:

Ondřej Hlavatý <aearsis@…> (2018-01-18 13:30:15)

git-committer:

Ondřej Hlavatý <aearsis@…> (2018-01-18 14:00:57)

Message:

xhci: implement sw trb ring

File:

• uspace/drv/bus/usb/xhci/trb_ring.h (modified) (1 diff)

uspace/drv/bus/usb/xhci/trb_ring.h

@@ -119 +119 @@
 int xhci_event_ring_dequeue(xhci_event_ring_t *, xhci_trb_t *);
 
+/**
+ * A TRB ring of which the software is both consumer and provider.
+ */
+typedef struct xhci_sw_ring {
+        xhci_trb_t *begin, *end;
+        xhci_trb_t *enqueue, *dequeue;
+
+        fibril_mutex_t guard;
+        fibril_condvar_t enqueued_cv, dequeued_cv;
+
+        bool running;
+} xhci_sw_ring_t;
+
+void xhci_sw_ring_init(xhci_sw_ring_t *, size_t);
+
+/* Both may block if the ring is full/empty. */
+int xhci_sw_ring_enqueue(xhci_sw_ring_t *, xhci_trb_t *);
+int xhci_sw_ring_dequeue(xhci_sw_ring_t *, xhci_trb_t *);
+
+void xhci_sw_ring_stop(xhci_sw_ring_t *);
+void xhci_sw_ring_fini(xhci_sw_ring_t *);
+
 #endif
+
+/**
+ * @}
+ */