qcacmn: Add RX prealloc pool for replenishing RX buffers

Add and initialize a preallocated pool of buffers which can
be used to replenish RX buffers. During replenish, the buffers
from the pool are used instead of allocating/mapping a new buffer
in the softirq context. This preallocated pool will be refilled
in thread context.

Change-Id: Idf3bd7d25c5d57ddba105ccd8fab672c26a184f1
CRs-Fixed: 2869345

dp/inc/cdp_txrx_misc.h

@@ -665,6 +665,29 @@ cdp_register_rx_mic_error_ind_handler(ol_txrx_soc_handle soc,
 	soc->ol_ops->rx_mic_error = rx_mic_cb;
 }
 
+typedef void (*rx_refill_thread_sched_cb)(ol_txrx_soc_handle soc);
+
+/**
+ * cdp_register_rx_refill_thread_sched_handler() - API to register RX refill
+ *                                                 thread schedule handler
+ *
+ * @soc: soc handle
+ *
+ * Return: void
+ */
+static inline void
+cdp_register_rx_refill_thread_sched_handler(ol_txrx_soc_handle soc,
+					    rx_refill_thread_sched_cb rx_sched_cb)
+{
+	if (!soc || !soc->ol_ops) {
+		QDF_TRACE(QDF_MODULE_ID_DP, QDF_TRACE_LEVEL_FATAL,
+			  "%s invalid instance", __func__);
+		return;
+	}
+
+	soc->ol_ops->dp_rx_sched_refill_thread = rx_sched_cb;
+}
+
 /**
  * cdp_pdev_reset_driver_del_ack() - reset driver TCP delayed ack flag
  * @soc: data path soc handle