IB/usnic: Add UDP support in u*verbs.c, u*main.c and u*util.h

Add supports for:
	1) Parsing the socket file descriptor pass down from userspace.
	2) IP notifiers
	3) Encoding the IP in the GID
	4) Other aux. changes to support UDP

Signed-off-by: Upinder Malhi <umalhi@cisco.com>
Signed-off-by: Roland Dreier <roland@purestorage.com>

1 files changed, 17 insertions, 0 deletions

diff --git a/drivers/infiniband/hw/usnic/usnic_common_util.h b/drivers/infiniband/hw/usnic/usnic_common_util.h
index 128550a4f9e2..afd8bfa379ed 100644
--- a/drivers/infiniband/hw/usnic/usnic_common_util.h
+++ b/drivers/infiniband/hw/usnic/usnic_common_util.h
@@ -36,6 +36,23 @@ usnic_mac_to_gid(const char *const mac, char *raw_gid)
 }
 
 static inline void
+usnic_mac_ip_to_gid(const char *const mac, const uint32_t inaddr, char *raw_gid)
+{
+        raw_gid[0] = 0xfe;
+        raw_gid[1] = 0x80;
+        memset(&raw_gid[2], 0, 2);
+        memcpy(&raw_gid[4], &inaddr, 4);
+        raw_gid[8] = mac[0]^2;
+        raw_gid[9] = mac[1];
+        raw_gid[10] = mac[2];
+        raw_gid[11] = 0xff;
+        raw_gid[12] = 0xfe;
+        raw_gid[13] = mac[3];
+        raw_gid[14] = mac[4];
+        raw_gid[15] = mac[5];
+}
+
+static inline void
 usnic_write_gid_if_id_from_mac(char *mac, char *raw_gid)
 {
         raw_gid[8] = mac[0]^2;