qcacmn: Add Lithium RX Core Processing Infrastructure

Add Lithium Rx basic packet processing path from REO.
Implement the following in this patch:

 - Rx buffer replenishment directly to RxDMA rings (WIN)

 - Rx descriptor management

 - Rx Path Processing for non-error packets

 - RxDMA optimization (access on 128 byte boundary)

Change-Id: I25aea3a79d5494a0447bc7ca919acb87b74f2760
CRs-Fixed: 1074199

dp/wifi3.0/dp_peer.h

@@ -0,0 +1,44 @@
+/*
+ * Copyright (c) 2016 The Linux Foundation. All rights reserved.
+ *
+ * Permission to use, copy, modify, and/or distribute this software for
+ * any purpose with or without fee is hereby granted, provided that the
+ * above copyright notice and this permission notice appear in all
+ * copies.
+ *
+ * THE SOFTWARE IS PROVIDED "AS IS" AND THE AUTHOR DISCLAIMS ALL
+ * WARRANTIES WITH REGARD TO THIS SOFTWARE INCLUDING ALL IMPLIED
+ * WARRANTIES OF MERCHANTABILITY AND FITNESS. IN NO EVENT SHALL THE
+ * AUTHOR BE LIABLE FOR ANY SPECIAL, DIRECT, INDIRECT, OR CONSEQUENTIAL
+ * DAMAGES OR ANY DAMAGES WHATSOEVER RESULTING FROM LOSS OF USE, DATA OR
+ * PROFITS, WHETHER IN AN ACTION OF CONTRACT, NEGLIGENCE OR OTHER
+ * TORTIOUS ACTION, ARISING OUT OF OR IN CONNECTION WITH THE USE OR
+ * PERFORMANCE OF THIS SOFTWARE.
+ */
+
+#include <qdf_types.h>
+#include <qdf_lock.h>
+#include "dp_types.h"
+
+#define DP_INVALID_PEER_ID 0xffff
+
+/**
+ * dp_peer_find_by_id() - Returns peer object given the peer id
+ *
+ * @soc		: core DP soc context
+ * @peer_id	: peer id from peer object can be retrieved
+ *
+ * Return: struct dp_peer*: Pointer to DP peer object
+ */
+static inline struct dp_peer *
+dp_peer_find_by_id(struct dp_soc *soc,
+		   uint16_t peer_id)
+{
+	struct dp_peer *peer;
+
+	/* TODO: Hold lock */
+	peer = (peer_id >= soc->max_peers) ? NULL :
+				soc->peer_id_to_obj_map[peer_id];
+
+	return peer;
+}