qcacmn: Defer IPA SMMU mapping to OPT_DP reserve

Currently, IPA SMMU map/unmap is called as part
of init. This causes every nbuf to be mapped
to IPA in the Rx path, causing throughputs
to drop. This change resolves the problem by
deferring the IPA SMMU map/unmap
call to OPT_DP filter reserve/release, as
nbuf needs to be mapped to IPA only in this scenario.

Change-Id: If198a6c5f22af58fdaf9d9c020c74b1f76002e37
CRs-Fixed: 3496679

dp/wifi3.0/dp_rx.h

@@ -2742,9 +2742,10 @@ void dp_rx_nbuf_unmap(struct dp_soc *soc,
 			    QDF_NBUF_CB_PADDR(rx_desc->nbuf),
 			    rx_desc_pool->buf_size);
 
-	dp_ipa_handle_rx_buf_smmu_mapping(soc, rx_desc->nbuf,
-					  rx_desc_pool->buf_size,
-					  false, __func__, __LINE__);
+	if (qdf_atomic_read(&soc->ipa_mapped))
+		dp_ipa_handle_rx_buf_smmu_mapping(soc, rx_desc->nbuf,
+						  rx_desc_pool->buf_size,
+						  false, __func__, __LINE__);
 
 	qdf_nbuf_unmap_nbytes_single(soc->osdev, rx_desc->nbuf,
 				     QDF_DMA_FROM_DEVICE,
@@ -2760,8 +2761,10 @@ void dp_rx_nbuf_unmap_pool(struct dp_soc *soc,
 {
 	dp_audio_smmu_unmap(soc->osdev, QDF_NBUF_CB_PADDR(nbuf),
 			    rx_desc_pool->buf_size);
-	dp_ipa_handle_rx_buf_smmu_mapping(soc, nbuf, rx_desc_pool->buf_size,
-					  false, __func__, __LINE__);
+	if (qdf_atomic_read(&soc->ipa_mapped))
+		dp_ipa_handle_rx_buf_smmu_mapping(soc, nbuf,
+						  rx_desc_pool->buf_size,
+						  false, __func__, __LINE__);
 	qdf_nbuf_unmap_nbytes_single(soc->osdev, nbuf, QDF_DMA_FROM_DEVICE,
 				     rx_desc_pool->buf_size);
 }