qcacld-3.0: place FST in CMEM if FW supports

Firmware advertizes it's support for placing FST in CMEM.
Check for FW's support before sending FSE setup HTT message.
If CMEM allocations are supported, flow search table will
be placed in CMEM, else it will be placed in DDR.

Change-Id: I3f473248a11f9556e36cf8f12930b9993796cc10
CRs-Fixed: 2771172

core/dp/txrx3.0/dp_rx_fst.c

@@ -254,6 +254,29 @@ out2:
 	return QDF_STATUS_E_NOMEM;
 }
 
+/**
+ * dp_rx_fst_check_cmem_support() - Check if FW can allocate FSE in CMEM,
+ * allocate FSE in DDR if FW doesn't support CMEM allocation
+ * @soc: DP SoC handle
+ *
+ * Return: None
+ */
+static void dp_rx_fst_check_cmem_support(struct dp_soc *soc)
+{
+	struct dp_rx_fst *fst = soc->rx_fst;
+
+	/* FW doesn't support CMEM FSE, keep it in DDR */
+	if (!soc->fst_in_cmem)
+		return;
+
+	hal_rx_fst_detach(fst->hal_rx_fst, soc->osdev);
+	fst->hal_rx_fst = NULL;
+	fst->hal_rx_fst_base_paddr = 0;
+
+	dp_rx_fst_cmem_init(fst);
+	fst->flow_deletion_supported = true;
+}
+
 /**
  * dp_rx_flow_send_fst_fw_setup() - Program FST parameters in FW/HW post-attach
  * @soc: SoC handle
@@ -269,6 +292,9 @@ QDF_STATUS dp_rx_flow_send_fst_fw_setup(struct dp_soc *soc,
 	struct wlan_cfg_dp_soc_ctxt *cfg = soc->wlan_cfg_ctx;
 	QDF_STATUS status;
 
+	/* check if FW has support to place FST in CMEM */
+	dp_rx_fst_check_cmem_support(soc);
+
 	/* mac_id = 0 is used to configure both macs with same FT */
 	fisa_hw_fst_setup_cmd.pdev_id = 0;
 	fisa_hw_fst_setup_cmd.max_entries = fst->max_entries;
@@ -299,7 +325,11 @@ void dp_rx_fst_detach(struct dp_soc *soc, struct dp_pdev *pdev)
 	dp_fst = soc->rx_fst;
 	if (qdf_likely(dp_fst)) {
 		qdf_timer_sync_cancel(&dp_fst->fse_cache_flush_timer);
-		hal_rx_fst_detach(dp_fst->hal_rx_fst, soc->osdev);
+		if (soc->fst_in_cmem)
+			dp_rx_fst_cmem_deinit(dp_fst);
+		else
+			hal_rx_fst_detach(dp_fst->hal_rx_fst, soc->osdev);
+
 		qdf_mem_free(dp_fst->base);
 		qdf_spinlock_destroy(&dp_fst->dp_rx_fst_lock);
 		qdf_mem_free(dp_fst);