wil6210: Helpers to deal with 'cidxtid' fields

Encode/decode helpers
Signed-off-by: Vladimir Kondratiev <qca_vkondrat@qca.qualcomm.com>
Signed-off-by: John W. Linville <linville@tuxdriver.com>

drivers/net/wireless/ath/wil6210/txrx.c

@@ -588,7 +588,7 @@ int wil_vring_init_tx(struct wil6210_priv *wil, int id, int size,
 				.ring_size = cpu_to_le16(size),
 			},
 			.ringid = id,
-			.cidxtid = (cid & 0xf) | ((tid & 0xf) << 4),
+			.cidxtid = mk_cidxtid(cid, tid),
 			.encap_trans_type = WMI_VRING_ENC_TYPE_802_3,
 			.mac_ctrl = 0,
 			.to_resolution = 0,

drivers/net/wireless/ath/wil6210/wil6210.h

@@ -125,6 +125,31 @@ struct RGF_ICR {
 
 /* Hardware definitions end */
 
+/**
+ * mk_cidxtid - construct @cidxtid field
+ * @cid: CID value
+ * @tid: TID value
+ *
+ * @cidxtid field encoded as bits 0..3 - CID; 4..7 - TID
+ */
+static inline u8 mk_cidxtid(u8 cid, u8 tid)
+{
+	return ((tid & 0xf) << 4) | (cid & 0xf);
+}
+
+/**
+ * parse_cidxtid - parse @cidxtid field
+ * @cid: store CID value here
+ * @tid: store TID value here
+ *
+ * @cidxtid field encoded as bits 0..3 - CID; 4..7 - TID
+ */
+static inline void parse_cidxtid(u8 cidxtid, u8 *cid, u8 *tid)
+{
+	*cid = cidxtid & 0xf;
+	*tid = (cidxtid >> 4) & 0xf;
+}
+
 struct wil6210_mbox_ring {
 	u32 base;
 	u16 entry_size; /* max. size of mbox entry, incl. all headers */