qcacmn: handle IPA buffer smmu map/unmap correctly

Handle ipa buffer smmu map/unmap with below changes,
(1) Do IPA smmu unmap for RX buffer received from REO
exception/WBM RX release/REO DST/RXDMA DST ring.
(2) Align IPA smmu map length to qdf_nbuf_map_nytes_single()
with fixed length.

Change-Id: I1ed46b31ed31f5b7e4e2484d519bc85d35ce1e69
CRs-Fixed: 2728644

dp/wifi3.0/dp_rx_desc.c

@@ -172,8 +172,10 @@ static QDF_STATUS __dp_rx_desc_nbuf_free(struct dp_soc *soc,
 		if (rx_desc->in_use) {
 			nbuf = rx_desc->nbuf;
 			if (!rx_desc->unmapped) {
-				dp_ipa_handle_rx_buf_smmu_mapping(soc, nbuf,
-								  false);
+				dp_ipa_handle_rx_buf_smmu_mapping(
+							soc, nbuf,
+							rx_desc_pool->buf_size,
+							false);
 				qdf_nbuf_unmap_nbytes_single(
 							soc->osdev,
 							rx_desc->nbuf,
@@ -326,8 +328,10 @@ void dp_rx_desc_nbuf_and_pool_free(struct dp_soc *soc, uint32_t pool_id,
 			nbuf = rx_desc_pool->array[i].rx_desc.nbuf;
 
 			if (!(rx_desc_pool->array[i].rx_desc.unmapped)) {
-				dp_ipa_handle_rx_buf_smmu_mapping(soc, nbuf,
-								  false);
+				dp_ipa_handle_rx_buf_smmu_mapping(
+							soc, nbuf,
+							rx_desc_pool->buf_size,
+							false);
 				qdf_nbuf_unmap_nbytes_single(
 							soc->osdev, nbuf,
 							QDF_DMA_FROM_DEVICE,
@@ -354,9 +358,10 @@ void dp_rx_desc_nbuf_free(struct dp_soc *soc,
 			nbuf = rx_desc_pool->array[i].rx_desc.nbuf;
 
 			if (!(rx_desc_pool->array[i].rx_desc.unmapped)) {
-				dp_ipa_handle_rx_buf_smmu_mapping(soc, nbuf,
-								  false);
-
+				dp_ipa_handle_rx_buf_smmu_mapping(
+						soc, nbuf,
+						rx_desc_pool->buf_size,
+						false);
 				qdf_nbuf_unmap_nbytes_single(
 							soc->osdev, nbuf,
 							QDF_DMA_FROM_DEVICE,