net: Add Qualcomm IPC router

Add an implementation of Qualcomm's IPC router protocol, used to
communicate with service providing remote processors.

Signed-off-by: Courtney Cavin <courtney.cavin@sonymobile.com>
Signed-off-by: Bjorn Andersson <bjorn.andersson@sonymobile.com>
[bjorn: Cope with 0 being a valid node id and implement RTM_NEWADDR]
Signed-off-by: Bjorn Andersson <bjorn.andersson@linaro.org>
Signed-off-by: David S. Miller <davem@davemloft.net>

1 files changed, 31 insertions, 0 deletions

diff --git a/net/qrtr/qrtr.h b/net/qrtr/qrtr.h
new file mode 100644
index 000000000000..2b848718f8fe
--- /dev/null
+++ b/net/qrtr/qrtr.h
@@ -0,0 +1,31 @@
+#ifndef __QRTR_H_
+#define __QRTR_H_
+
+#include <linux/types.h>
+
+struct sk_buff;
+
+/* endpoint node id auto assignment */
+#define QRTR_EP_NID_AUTO (-1)
+
+/**
+ * struct qrtr_endpoint - endpoint handle
+ * @xmit: Callback for outgoing packets
+ *
+ * The socket buffer passed to the xmit function becomes owned by the endpoint
+ * driver.  As such, when the driver is done with the buffer, it should
+ * call kfree_skb() on failure, or consume_skb() on success.
+ */
+struct qrtr_endpoint {
+	int (*xmit)(struct qrtr_endpoint *ep, struct sk_buff *skb);
+	/* private: not for endpoint use */
+	struct qrtr_node *node;
+};
+
+int qrtr_endpoint_register(struct qrtr_endpoint *ep, unsigned int nid);
+
+void qrtr_endpoint_unregister(struct qrtr_endpoint *ep);
+
+int qrtr_endpoint_post(struct qrtr_endpoint *ep, const void *data, size_t len);
+
+#endif