smc: link layer control (LLC)
send and receive LLC messages CONFIRM_LINK (via IB message send and CQE)
Signed-off-by: Ursula Braun <ubraun@linux.vnet.ibm.com>
Signed-off-by: David S. Miller <davem@davemloft.net>
diff --git a/net/smc/smc_llc.h b/net/smc/smc_llc.h
new file mode 100644
index 0000000..b472f85
--- /dev/null
+++ b/net/smc/smc_llc.h
@@ -0,0 +1,63 @@
+/*
+ * Shared Memory Communications over RDMA (SMC-R) and RoCE
+ *
+ * Definitions for LLC (link layer control) message handling
+ *
+ * Copyright IBM Corp. 2016
+ *
+ * Author(s): Klaus Wacker <Klaus.Wacker@de.ibm.com>
+ * Ursula Braun <ubraun@linux.vnet.ibm.com>
+ */
+
+#ifndef SMC_LLC_H
+#define SMC_LLC_H
+
+#include "smc_wr.h"
+
+#define SMC_LLC_FLAG_RESP 0x80
+
+#define SMC_LLC_WAIT_FIRST_TIME (5 * HZ)
+
+enum smc_llc_reqresp {
+ SMC_LLC_REQ,
+ SMC_LLC_RESP
+};
+
+enum smc_llc_msg_type {
+ SMC_LLC_CONFIRM_LINK = 0x01,
+};
+
+#define SMC_LLC_DATA_LEN 40
+
+struct smc_llc_hdr {
+ struct smc_wr_rx_hdr common;
+ u8 length; /* 44 */
+ u8 reserved;
+ u8 flags;
+};
+
+struct smc_llc_msg_confirm_link { /* type 0x01 */
+ struct smc_llc_hdr hd;
+ u8 sender_mac[ETH_ALEN];
+ u8 sender_gid[SMC_GID_SIZE];
+ u8 sender_qp_num[3];
+ u8 link_num;
+ u8 link_uid[SMC_LGR_ID_SIZE];
+ u8 max_links;
+ u8 reserved[9];
+};
+
+union smc_llc_msg {
+ struct smc_llc_msg_confirm_link confirm_link;
+ struct {
+ struct smc_llc_hdr hdr;
+ u8 data[SMC_LLC_DATA_LEN];
+ } raw;
+};
+
+/* transmit */
+int smc_llc_send_confirm_link(struct smc_link *lnk, u8 mac[], union ib_gid *gid,
+ enum smc_llc_reqresp reqresp);
+int smc_llc_init(void) __init;
+
+#endif /* SMC_LLC_H */