qcacld-3.0: Datapath changes for WiSA specification

Datapath changes for WiSA specification.
- Multicast packets with 50000 as destination
  port should go at 6Mbps.
- Multicast packets with 50001 as destination
  port should go at 24Mbps.

Change-Id: Ic219f58f3e8b2f6863a275928429153defe63b5a
CRs-Fixed: 1010412

11 files changed, 491 insertions, 252 deletions

diff --git a/core/dp/htt/htt.c b/core/dp/htt/htt.c
index fe30c3405d3a..68ca137aa1ea 100644
--- a/core/dp/htt/htt.c
+++ b/core/dp/htt/htt.c
@@ -392,28 +392,6 @@ void htt_detach_target(htt_pdev_handle pdev)
 {
 }
 
-#ifdef WLAN_FEATURE_FASTPATH
-/**
- * htt_pkt_dl_len_get() HTT packet download length for fastpath case
- *
- * @htt_dev: pointer to htt device.
- *
- * As fragment one already downloaded HTT/HTC header, download length is
- * remaining bytes.
- *
- * Return: download length
- */
-int htt_pkt_dl_len_get(struct htt_pdev_t *htt_dev)
-{
-	return htt_dev->download_len - sizeof(struct htt_host_tx_desc_t);
-}
-#else
-int htt_pkt_dl_len_get(struct htt_pdev_t *htt_dev)
-{
-	return 0;
-}
-#endif
-
 static inline
 int htt_update_endpoint(struct htt_pdev_t *pdev,
 			uint16_t service_id, HTC_ENDPOINT_ID ep)
diff --git a/core/dp/htt/htt_tx.c b/core/dp/htt/htt_tx.c
index eb011a7ecbde..dd75737991b3 100644
--- a/core/dp/htt/htt_tx.c
+++ b/core/dp/htt/htt_tx.c
@@ -605,6 +605,10 @@ int htt_tx_send_std(htt_pdev_handle pdev, qdf_nbuf_t msdu, uint16_t msdu_id)
 		download_len = packet_len;
 	}
 
+	if (QDF_NBUF_CB_TX_EXTRA_FRAG_FLAGS_EXT_HEADER(msdu))
+		download_len += sizeof(struct htt_tx_msdu_desc_ext_t);
+
+
 	QDF_NBUF_UPDATE_TX_PKT_COUNT(msdu, QDF_NBUF_TX_PKT_HTT);
 	DPTRACE(qdf_dp_trace(msdu, QDF_DP_TRACE_HTT_PACKET_PTR_RECORD,
 				qdf_nbuf_data_addr(msdu),
@@ -1154,3 +1158,355 @@ htt_tx_desc_fill_tso_info(htt_pdev_handle pdev, void *desc,
 	}
 }
 #endif /* FEATURE_TSO */
+
+/**
+ * htt_get_ext_tid() - get ext_tid value
+ * @type: extension header type
+ * @ext_header_data: header data
+ * @msdu_info: msdu info
+ *
+ * Return: ext_tid value
+ */
+static inline
+int htt_get_ext_tid(enum extension_header_type type,
+	void *ext_header_data, struct htt_msdu_info_t *msdu_info)
+{
+	if (type == OCB_MODE_EXT_HEADER && ext_header_data)
+		return ((struct ocb_tx_ctrl_hdr_t *)ext_header_data)->ext_tid;
+	else
+		return msdu_info->info.ext_tid;
+}
+
+/**
+ * htt_get_channel_freq() - get channel frequency
+ * @type: extension header type
+ * @ext_header_data: header data
+ *
+ * Return: channel frequency number
+ */
+static inline
+int htt_get_channel_freq(enum extension_header_type type,
+	void *ext_header_data)
+{
+	if (type == OCB_MODE_EXT_HEADER && ext_header_data)
+		return ((struct ocb_tx_ctrl_hdr_t *)ext_header_data)
+							->channel_freq;
+	else
+		return HTT_INVALID_CHANNEL;
+}
+
+/**
+ * htt_fill_ocb_ext_header() - fill OCB extension header
+ * @msdu: network buffer
+ * @local_desc_ext: extension descriptor
+ * @type: extension header type
+ * @ext_header_data: header data
+ * @is_dsrc: is dsrc is eenabled or not
+ *
+ * Return: none
+ */
+static
+void htt_fill_ocb_ext_header(qdf_nbuf_t msdu,
+	struct htt_tx_msdu_desc_ext_t *local_desc_ext,
+	enum extension_header_type type, void *ext_header_data)
+{
+	struct ocb_tx_ctrl_hdr_t *tx_ctrl =
+		(struct ocb_tx_ctrl_hdr_t *)ext_header_data;
+
+	if (tx_ctrl->all_flags == 0)
+		return;
+	/*
+	  * Copy the info that was read from TX control header from the
+	  * user application to the extended HTT header.
+	  * First copy everything
+	  * to a local temp structure, and then copy everything to the
+	  * actual uncached structure in one go to save memory writes.
+	  */
+	local_desc_ext->valid_pwr = tx_ctrl->valid_pwr;
+	local_desc_ext->valid_mcs_mask = tx_ctrl->valid_datarate;
+	local_desc_ext->valid_retries = tx_ctrl->valid_retries;
+	local_desc_ext->valid_expire_tsf = tx_ctrl->valid_expire_tsf;
+	local_desc_ext->valid_chainmask = tx_ctrl->valid_chain_mask;
+
+	local_desc_ext->pwr = tx_ctrl->pwr;
+	if (tx_ctrl->valid_datarate &&
+			tx_ctrl->datarate <= htt_ofdm_datarate_max)
+		local_desc_ext->mcs_mask =
+			(1 << (tx_ctrl->datarate + 4));
+	local_desc_ext->retry_limit = tx_ctrl->retry_limit;
+	local_desc_ext->expire_tsf_lo = tx_ctrl->expire_tsf_lo;
+	local_desc_ext->expire_tsf_hi = tx_ctrl->expire_tsf_hi;
+	local_desc_ext->chain_mask = tx_ctrl->chain_mask;
+	local_desc_ext->is_dsrc = 1;
+	qdf_nbuf_push_head(msdu, sizeof(struct htt_tx_msdu_desc_ext_t));
+	qdf_mem_copy(qdf_nbuf_data(msdu), local_desc_ext,
+			sizeof(struct htt_tx_msdu_desc_ext_t));
+	QDF_NBUF_CB_TX_EXTRA_FRAG_FLAGS_EXT_HEADER(msdu) = 1;
+}
+
+/**
+ * htt_fill_wisa_ext_header() - fill WiSA extension header
+ * @msdu: network buffer
+ * @local_desc_ext: extension descriptor
+ * @type: extension header type
+ * @ext_header_data: header data
+ *
+ * Return: none
+ */
+static
+void htt_fill_wisa_ext_header(qdf_nbuf_t msdu,
+	struct htt_tx_msdu_desc_ext_t *local_desc_ext,
+	enum extension_header_type type, void *ext_header_data)
+{
+	void *qdf_ctx = cds_get_context(QDF_MODULE_ID_QDF_DEVICE);
+	QDF_STATUS status;
+
+	local_desc_ext->valid_mcs_mask = 1;
+	if (WISA_MODE_EXT_HEADER_6MBPS == type)
+		local_desc_ext->mcs_mask = htt_ofdm_datarate_6_mbps;
+	else
+		local_desc_ext->mcs_mask = htt_ofdm_datarate_24_mbps;
+	local_desc_ext->valid_nss_mask = 1;
+	local_desc_ext->nss_mask = 1;
+	local_desc_ext->valid_bandwidth = 1;
+	local_desc_ext->bandwidth_mask = htt_tx_bandwidth_20MHz;
+	local_desc_ext->valid_guard_interval = 1;
+	local_desc_ext->guard_interval = htt_tx_guard_interval_regular;
+
+	/*
+	 * Do dma_unmap and dma_map again if already mapped
+	 * as adding extra bytes in skb
+	 */
+	if (QDF_NBUF_CB_PADDR(msdu) != 0)
+		qdf_nbuf_unmap_single(qdf_ctx, msdu, QDF_DMA_TO_DEVICE);
+
+	qdf_nbuf_push_head(msdu, sizeof(struct htt_tx_msdu_desc_ext_t));
+	qdf_mem_copy(qdf_nbuf_data(msdu), local_desc_ext,
+			sizeof(struct htt_tx_msdu_desc_ext_t));
+
+	if (QDF_NBUF_CB_PADDR(msdu) != 0) {
+		status = qdf_nbuf_map_single(qdf_ctx, msdu, QDF_DMA_TO_DEVICE);
+		if (qdf_unlikely(status != QDF_STATUS_SUCCESS)) {
+			QDF_TRACE(QDF_MODULE_ID_TXRX, QDF_TRACE_LEVEL_WARN,
+				"%s: nbuf map failed", __func__);
+			return;
+		}
+	}
+	QDF_NBUF_CB_TX_EXTRA_FRAG_FLAGS_EXT_HEADER(msdu) = 1;
+}
+
+/**
+ * htt_push_ext_header() - fill extension header
+ * @msdu: network buffer
+ * @local_desc_ext: extension descriptor
+ * @type: extension header type
+ * @ext_header_data: header data
+ * @is_dsrc: is dsrc is eenabled or not
+ *
+ * Return: none
+ */
+static
+void htt_push_ext_header(qdf_nbuf_t msdu,
+	struct htt_tx_msdu_desc_ext_t *local_desc_ext,
+	enum extension_header_type type, void *ext_header_data)
+{
+	switch (type) {
+	case OCB_MODE_EXT_HEADER:
+		htt_fill_ocb_ext_header(msdu, local_desc_ext,
+					type, ext_header_data);
+		break;
+	case WISA_MODE_EXT_HEADER_6MBPS:
+	case WISA_MODE_EXT_HEADER_24MBPS:
+		htt_fill_wisa_ext_header(msdu, local_desc_ext,
+					type, ext_header_data);
+		break;
+	default:
+		QDF_TRACE(QDF_MODULE_ID_HTT, QDF_TRACE_LEVEL_INFO,
+			"Invalid EXT header type %d\n", type);
+		break;
+	}
+}
+
+/**
+ * htt_tx_desc_init() - Initialize the per packet HTT Tx descriptor
+ * @pdev:		  The handle of the physical device sending the
+ *			  tx data
+ * @htt_tx_desc:	  Abstract handle to the tx descriptor
+ * @htt_tx_desc_paddr_lo: Physical address of the HTT tx descriptor
+ * @msdu_id:		  ID to tag the descriptor with.
+ *			  The FW sends this ID back to host as a cookie
+ *			  during Tx completion, which the host uses to
+ *			  identify the MSDU.
+ *			  This ID is an index into the OL Tx desc. array.
+ * @msdu:		  The MSDU that is being prepared for transmission
+ * @msdu_info:		  Tx MSDU meta-data
+ * @tso_info:		  Storage for TSO meta-data
+ * @ext_header_data:      extension header data
+ * @type:                 extension header type
+ *
+ * This function initializes the HTT tx descriptor.
+ * HTT Tx descriptor is a host-f/w interface structure, and meta-data
+ * accompanying every packet downloaded to f/w via the HTT interface.
+ */
+void
+htt_tx_desc_init(htt_pdev_handle pdev,
+		 void *htt_tx_desc,
+		 qdf_dma_addr_t htt_tx_desc_paddr,
+		 uint16_t msdu_id,
+		 qdf_nbuf_t msdu, struct htt_msdu_info_t *msdu_info,
+		 struct qdf_tso_info_t *tso_info,
+		 void *ext_header_data,
+		 enum extension_header_type type)
+{
+	uint8_t  pkt_type, pkt_subtype = 0, ce_pkt_type = 0;
+	uint32_t hw_classify = 0, data_attr = 0;
+	uint32_t *word0, *word1, local_word3;
+#if HTT_PADDR64
+	uint32_t *word4;
+#else /* ! HTT_PADDR64 */
+	uint32_t *word3;
+#endif /* HTT_PADDR64 */
+	uint32_t local_word0, local_word1;
+	struct htt_host_tx_desc_t *htt_host_tx_desc =
+		(struct htt_host_tx_desc_t *)
+		(((char *)htt_tx_desc) - HTT_TX_DESC_VADDR_OFFSET);
+	bool desc_ext_required = (type != EXT_HEADER_NOT_PRESENT);
+	uint16_t channel_freq;
+	void *qdf_ctx = cds_get_context(QDF_MODULE_ID_QDF_DEVICE);
+	QDF_STATUS status;
+
+	word0 = (uint32_t *) htt_tx_desc;
+	word1 = word0 + 1;
+	/*
+	 * word2 is frag desc pointer
+	 * word3 or 4 is peer_id
+	 */
+#if HTT_PADDR64
+	word4 = word0 + 4;      /* Dword 3 */
+#else /* ! HTT_PADDR64  */
+	word3 = word0 + 3;      /* Dword 3 */
+#endif /* HTT_PADDR64 */
+
+	pkt_type = msdu_info->info.l2_hdr_type;
+
+	if (qdf_likely(pdev->cfg.ce_classify_enabled)) {
+		if (qdf_likely(pkt_type == htt_pkt_type_eth2 ||
+			pkt_type == htt_pkt_type_ethernet))
+			qdf_nbuf_tx_info_get(msdu, pkt_type, pkt_subtype,
+				     hw_classify);
+
+		ce_pkt_type = htt_to_ce_pkt_type[pkt_type];
+		if (0xffffffff == ce_pkt_type) {
+			QDF_TRACE(QDF_MODULE_ID_TXRX, QDF_TRACE_LEVEL_DEBUG,
+			"Invalid HTT pkt type %d\n", pkt_type);
+			return;
+		}
+	}
+
+	/*
+	 * HTT Tx Desc is in uncached memory. Used cached writes per word, to
+	 * reduce unnecessary memory access.
+	 */
+
+	local_word0 = 0;
+	if (msdu_info) {
+		HTT_H2T_MSG_TYPE_SET(local_word0, HTT_H2T_MSG_TYPE_TX_FRM);
+		HTT_TX_DESC_PKT_TYPE_SET(local_word0, pkt_type);
+		HTT_TX_DESC_PKT_SUBTYPE_SET(local_word0, pkt_subtype);
+		HTT_TX_DESC_VDEV_ID_SET(local_word0, msdu_info->info.vdev_id);
+		HTT_TX_DESC_EXT_TID_SET(local_word0, htt_get_ext_tid(type,
+						ext_header_data, msdu_info));
+		HTT_TX_DESC_EXTENSION_SET(local_word0, desc_ext_required);
+		HTT_TX_DESC_EXT_TID_SET(local_word0, msdu_info->info.ext_tid);
+		HTT_TX_DESC_CKSUM_OFFLOAD_SET(local_word0,
+					      msdu_info->action.cksum_offload);
+		HTT_TX_DESC_NO_ENCRYPT_SET(local_word0,
+					   msdu_info->action.do_encrypt ?
+					   0 : 1);
+	}
+
+	*word0 = local_word0;
+
+	local_word1 = 0;
+
+	if (tso_info->is_tso)
+		HTT_TX_DESC_FRM_LEN_SET(local_word1, tso_info->total_len);
+	else
+		HTT_TX_DESC_FRM_LEN_SET(local_word1, qdf_nbuf_len(msdu));
+
+	HTT_TX_DESC_FRM_ID_SET(local_word1, msdu_id);
+	*word1 = local_word1;
+
+	/* Initialize peer_id to INVALID_PEER because
+	   this is NOT Reinjection path */
+	local_word3 = HTT_INVALID_PEER;
+	channel_freq = htt_get_channel_freq(type, ext_header_data);
+	if (channel_freq != HTT_INVALID_CHANNEL)
+		HTT_TX_DESC_CHAN_FREQ_SET(local_word3, channel_freq);
+#if HTT_PADDR64
+	*word4 = local_word3;
+#else /* ! HTT_PADDR64 */
+	*word3 = local_word3;
+#endif /* HTT_PADDR64 */
+
+	/*
+	 *  If any of the tx control flags are set, then we need the extended
+	 *  HTT header.
+	 */
+	if (desc_ext_required) {
+		struct htt_tx_msdu_desc_ext_t local_desc_ext = {0};
+
+		htt_push_ext_header(msdu, &local_desc_ext,
+			type, ext_header_data);
+	}
+
+	/*
+	 * Specify that the data provided by the OS is a bytestream,
+	 * and thus should not be byte-swapped during the HIF download
+	 * even if the host is big-endian.
+	 * There could be extra fragments added before the OS's fragments,
+	 * e.g. for TSO, so it's incorrect to clear the frag 0 wordstream flag.
+	 * Instead, clear the wordstream flag for the final fragment, which
+	 * is certain to be (one of the) fragment(s) provided by the OS.
+	 * Setting the flag for this final fragment suffices for specifying
+	 * all fragments provided by the OS rather than added by the driver.
+	 */
+	qdf_nbuf_set_frag_is_wordstream(msdu, qdf_nbuf_get_num_frags(msdu) - 1,
+					0);
+
+	if (QDF_NBUF_CB_PADDR(msdu) == 0) {
+		status = qdf_nbuf_map_single(qdf_ctx, msdu, QDF_DMA_TO_DEVICE);
+		if (qdf_unlikely(status != QDF_STATUS_SUCCESS)) {
+			QDF_TRACE(QDF_MODULE_ID_TXRX, QDF_TRACE_LEVEL_ERROR,
+				"%s: nbuf map failed", __func__);
+			return;
+		}
+	}
+
+	/* store a link to the HTT tx descriptor within the netbuf */
+	qdf_nbuf_frag_push_head(msdu, sizeof(struct htt_host_tx_desc_t),
+				(char *)htt_host_tx_desc, /* virtual addr */
+				htt_tx_desc_paddr);
+
+	/*
+	 * Indicate that the HTT header (and HTC header) is a meta-data
+	 * "wordstream", i.e. series of uint32_t, rather than a data
+	 * bytestream.
+	 * This allows the HIF download to byteswap the HTT + HTC headers if
+	 * the host is big-endian, to convert to the target's little-endian
+	 * format.
+	 */
+	qdf_nbuf_set_frag_is_wordstream(msdu, 0, 1);
+
+	if (qdf_likely(pdev->cfg.ce_classify_enabled &&
+		(msdu_info->info.l2_hdr_type != htt_pkt_type_mgmt))) {
+		uint32_t pkt_offset = qdf_nbuf_get_frag_len(msdu, 0);
+
+		data_attr = hw_classify << QDF_CE_TX_CLASSIFY_BIT_S;
+		data_attr |= ce_pkt_type << QDF_CE_TX_PKT_TYPE_BIT_S;
+		data_attr |= pkt_offset  << QDF_CE_TX_PKT_OFFSET_BIT_S;
+	}
+
+	qdf_nbuf_data_attr_set(msdu, data_attr);
+}
+
diff --git a/core/dp/ol/inc/ol_htt_tx_api.h b/core/dp/ol/inc/ol_htt_tx_api.h
index a6b785c805f2..f5d0abc66fab 100644
--- a/core/dp/ol/inc/ol_htt_tx_api.h
+++ b/core/dp/ol/inc/ol_htt_tx_api.h
@@ -47,6 +47,9 @@
 #include <ol_htt_api.h>         /* htt_pdev_handle */
 #include <htt_types.h>
 #include <qdf_trace.h>
+#include <cds_api.h>
+
+#define HTT_INVALID_CHANNEL -1
 
 /* Remove these macros when they get added to htt.h. */
 #ifndef HTT_TX_DESC_EXTENSION_GET
@@ -492,6 +495,19 @@ enum htt_ce_tx_pkt_type {
 	tx_pkt_type_mgmt = 4
 };
 
+/**
+ * enum extension_header_type - extension header type
+ * @EXT_HEADER_NOT_PRESENT: extension header not present
+ * @OCB_MODE_EXT_HEADER: Extension header for OCB mode
+ * @WISA_MODE_EXT_HEADER_6MBPS: WISA mode 6Mbps header
+ * @WISA_MODE_EXT_HEADER_24MBPS: WISA mode 24Mbps header
+ */
+enum extension_header_type {
+	EXT_HEADER_NOT_PRESENT,
+	OCB_MODE_EXT_HEADER,
+	WISA_MODE_EXT_HEADER_6MBPS,
+	WISA_MODE_EXT_HEADER_24MBPS,
+};
 
 extern const uint32_t htt_to_ce_pkt_type[];
 
@@ -507,26 +523,6 @@ extern const uint32_t htt_to_ce_pkt_type[];
  */
 #define HTT_TX_DESC_VADDR_OFFSET 8
 
-/**
- * htt_tx_desc_init() - Initialize the per packet HTT Tx descriptor
- * @pdev:		  The handle of the physical device sending the
- *			  tx data
- * @htt_tx_desc:	  Abstract handle to the tx descriptor
- * @htt_tx_desc_paddr_lo: Physical address of the HTT tx descriptor
- * @msdu_id:		  ID to tag the descriptor with.
- *			  The FW sends this ID back to host as a cookie
- *			  during Tx completion, which the host uses to
- *			  identify the MSDU.
- *			  This ID is an index into the OL Tx desc. array.
- * @msdu:		  The MSDU that is being prepared for transmission
- * @msdu_info:		  Tx MSDU meta-data
- * @tso_info:		  Storage for TSO meta-data
- *
- * This function initializes the HTT tx descriptor.
- * HTT Tx descriptor is a host-f/w interface structure, and meta-data
- * accompanying every packet downloaded to f/w via the HTT interface.
- */
-static inline
 void
 htt_tx_desc_init(htt_pdev_handle pdev,
 		 void *htt_tx_desc,
@@ -534,175 +530,8 @@ htt_tx_desc_init(htt_pdev_handle pdev,
 		 uint16_t msdu_id,
 		 qdf_nbuf_t msdu, struct htt_msdu_info_t *msdu_info,
 		 struct qdf_tso_info_t *tso_info,
-		 struct ocb_tx_ctrl_hdr_t *tx_ctrl,
-		 uint8_t is_dsrc)
-{
-	uint8_t  pkt_type, pkt_subtype = 0, ce_pkt_type = 0;
-	uint32_t hw_classify = 0, data_attr = 0;
-	uint32_t *word0, *word1, local_word3;
-#if HTT_PADDR64
-	uint32_t *word4;
-#else /* ! HTT_PADDR64 */
-	uint32_t *word3;
-#endif /* HTT_PADDR64 */
-	uint32_t local_word0, local_word1;
-	struct htt_host_tx_desc_t *htt_host_tx_desc =
-		(struct htt_host_tx_desc_t *)
-		(((char *)htt_tx_desc) - HTT_TX_DESC_VADDR_OFFSET);
-	bool desc_ext_required = (tx_ctrl && tx_ctrl->all_flags != 0);
-
-	word0 = (uint32_t *) htt_tx_desc;
-	word1 = word0 + 1;
-	/*
-	 * word2 is frag desc pointer
-	 * word3 or 4 is peer_id
-	 */
-#if HTT_PADDR64
-	word4 = word0 + 4;      /* Dword 3 */
-#else /* ! HTT_PADDR64  */
-	word3 = word0 + 3;      /* Dword 3 */
-#endif /* HTT_PADDR64 */
-
-	pkt_type = msdu_info->info.l2_hdr_type;
-
-	if (qdf_likely(pdev->cfg.ce_classify_enabled)) {
-		if (qdf_likely(pkt_type == htt_pkt_type_eth2 ||
-			pkt_type == htt_pkt_type_ethernet))
-			qdf_nbuf_tx_info_get(msdu, pkt_type, pkt_subtype,
-				     hw_classify);
-
-		ce_pkt_type = htt_to_ce_pkt_type[pkt_type];
-		if (0xffffffff == ce_pkt_type) {
-			QDF_TRACE(QDF_MODULE_ID_TXRX, QDF_TRACE_LEVEL_DEBUG,
-			"Invalid HTT pkt type %d\n", pkt_type);
-			return;
-		}
-	}
-
-	/*
-	 * HTT Tx Desc is in uncached memory. Used cached writes per word, to
-	 * reduce unnecessary memory access.
-	 */
-
-	local_word0 = 0;
-	if (msdu_info) {
-		HTT_H2T_MSG_TYPE_SET(local_word0, HTT_H2T_MSG_TYPE_TX_FRM);
-		HTT_TX_DESC_PKT_TYPE_SET(local_word0, pkt_type);
-		HTT_TX_DESC_PKT_SUBTYPE_SET(local_word0, pkt_subtype);
-		HTT_TX_DESC_VDEV_ID_SET(local_word0, msdu_info->info.vdev_id);
-		if (tx_ctrl && tx_ctrl->valid_tid)
-			HTT_TX_DESC_EXT_TID_SET(local_word0, tx_ctrl->ext_tid);
-		else
-			HTT_TX_DESC_EXT_TID_SET(local_word0,
-				msdu_info->info.ext_tid);
-		HTT_TX_DESC_EXTENSION_SET(local_word0, desc_ext_required);
-		HTT_TX_DESC_EXT_TID_SET(local_word0, msdu_info->info.ext_tid);
-		HTT_TX_DESC_CKSUM_OFFLOAD_SET(local_word0,
-					      msdu_info->action.cksum_offload);
-		HTT_TX_DESC_NO_ENCRYPT_SET(local_word0,
-					   msdu_info->action.do_encrypt ?
-					   0 : 1);
-	}
-
-	*word0 = local_word0;
-
-	local_word1 = 0;
-
-	if (tso_info->is_tso)
-		HTT_TX_DESC_FRM_LEN_SET(local_word1, tso_info->total_len);
-	else
-		HTT_TX_DESC_FRM_LEN_SET(local_word1, qdf_nbuf_len(msdu));
-
-	HTT_TX_DESC_FRM_ID_SET(local_word1, msdu_id);
-	*word1 = local_word1;
-
-	/* Initialize peer_id to INVALID_PEER because
-	   this is NOT Reinjection path */
-	local_word3 = HTT_INVALID_PEER;
-	if (tx_ctrl && tx_ctrl->channel_freq)
-		HTT_TX_DESC_CHAN_FREQ_SET(local_word3, tx_ctrl->channel_freq);
-#if HTT_PADDR64
-	*word4 = local_word3;
-#else /* ! HTT_PADDR64 */
-	*word3 = local_word3;
-#endif /* HTT_PADDR64 */
-
-	/*
-	 *  If any of the tx control flags are set, then we need the extended
-	 *  HTT header.
-	 */
-	if (desc_ext_required) {
-		struct htt_tx_msdu_desc_ext_t local_desc_ext = {0};
-
-		/*
-		 * Copy the info that was read from TX control header from the
-		 * user application to the extended HTT header.
-		 * First copy everything
-		 * to a local temp structure, and then copy everything to the
-		 * actual uncached structure in one go to save memory writes.
-		 */
-		local_desc_ext.valid_pwr = tx_ctrl->valid_pwr;
-		local_desc_ext.valid_mcs_mask = tx_ctrl->valid_datarate;
-		local_desc_ext.valid_retries = tx_ctrl->valid_retries;
-		local_desc_ext.valid_expire_tsf = tx_ctrl->valid_expire_tsf;
-		local_desc_ext.valid_chainmask = tx_ctrl->valid_chain_mask;
-
-		local_desc_ext.pwr = tx_ctrl->pwr;
-		if (tx_ctrl->valid_datarate &&
-				tx_ctrl->datarate <= htt_ofdm_datarate_max)
-			local_desc_ext.mcs_mask =
-				(1 << (tx_ctrl->datarate + 4));
-		local_desc_ext.retry_limit = tx_ctrl->retry_limit;
-		local_desc_ext.expire_tsf_lo = tx_ctrl->expire_tsf_lo;
-		local_desc_ext.expire_tsf_hi = tx_ctrl->expire_tsf_hi;
-		local_desc_ext.chain_mask = tx_ctrl->chain_mask;
-
-		local_desc_ext.is_dsrc = (is_dsrc != 0);
-
-		qdf_nbuf_push_head(msdu, sizeof(local_desc_ext));
-		qdf_mem_copy(qdf_nbuf_data(msdu), &local_desc_ext,
-				sizeof(local_desc_ext));
-	}
-
-	/*
-	 * Specify that the data provided by the OS is a bytestream,
-	 * and thus should not be byte-swapped during the HIF download
-	 * even if the host is big-endian.
-	 * There could be extra fragments added before the OS's fragments,
-	 * e.g. for TSO, so it's incorrect to clear the frag 0 wordstream flag.
-	 * Instead, clear the wordstream flag for the final fragment, which
-	 * is certain to be (one of the) fragment(s) provided by the OS.
-	 * Setting the flag for this final fragment suffices for specifying
-	 * all fragments provided by the OS rather than added by the driver.
-	 */
-	qdf_nbuf_set_frag_is_wordstream(msdu, qdf_nbuf_get_num_frags(msdu) - 1,
-					0);
-
-	/* store a link to the HTT tx descriptor within the netbuf */
-	qdf_nbuf_frag_push_head(msdu, sizeof(struct htt_host_tx_desc_t),
-				(char *)htt_host_tx_desc, /* virtual addr */
-				htt_tx_desc_paddr);
-
-	/*
-	 * Indicate that the HTT header (and HTC header) is a meta-data
-	 * "wordstream", i.e. series of uint32_t, rather than a data
-	 * bytestream.
-	 * This allows the HIF download to byteswap the HTT + HTC headers if
-	 * the host is big-endian, to convert to the target's little-endian
-	 * format.
-	 */
-	qdf_nbuf_set_frag_is_wordstream(msdu, 0, 1);
-
-	if (qdf_likely(pdev->cfg.ce_classify_enabled &&
-		(msdu_info->info.l2_hdr_type != htt_pkt_type_mgmt))) {
-		uint32_t pkt_offset = qdf_nbuf_get_frag_len(msdu, 0);
-		data_attr = hw_classify << QDF_CE_TX_CLASSIFY_BIT_S;
-		data_attr |= ce_pkt_type << QDF_CE_TX_PKT_TYPE_BIT_S;
-		data_attr |= pkt_offset  << QDF_CE_TX_PKT_OFFSET_BIT_S;
-	}
-
-	qdf_nbuf_data_attr_set(msdu, data_attr);
-}
+		 void *ext_header_data,
+		 enum extension_header_type type);
 
 /**
  * @brief Set a flag to indicate that the MSDU in question was postponed.
diff --git a/core/dp/txrx/ol_rx_fwd.c b/core/dp/txrx/ol_rx_fwd.c
index 317d12cdff38..7d33ae3cafce 100644
--- a/core/dp/txrx/ol_rx_fwd.c
+++ b/core/dp/txrx/ol_rx_fwd.c
@@ -119,7 +119,6 @@ static inline void ol_rx_fwd_to_tx(struct ol_txrx_vdev_t *vdev, qdf_nbuf_t msdu)
 	 * Map the netbuf, so it's accessible to the DMA that
 	 * sends it to the target.
 	 */
-	qdf_nbuf_map_single(pdev->osdev, msdu, QDF_DMA_TO_DEVICE);
 	qdf_nbuf_set_next(msdu, NULL);  /* add NULL terminator */
 
 	msdu = OL_TX_LL(vdev, msdu);
@@ -130,7 +129,6 @@ static inline void ol_rx_fwd_to_tx(struct ol_txrx_vdev_t *vdev, qdf_nbuf_t msdu)
 		 * We could store the frame and try again later,
 		 * but the simplest solution is to discard the frames.
 		 */
-		qdf_nbuf_unmap_single(pdev->osdev, msdu, QDF_DMA_TO_DEVICE);
 		qdf_nbuf_tx_free(msdu, QDF_NBUF_PKT_ERROR);
 	}
 }
diff --git a/core/dp/txrx/ol_tx.c b/core/dp/txrx/ol_tx.c
index d1b59c80e401..789dae36d7bb 100644
--- a/core/dp/txrx/ol_tx.c
+++ b/core/dp/txrx/ol_tx.c
@@ -54,8 +54,8 @@
 #include <htt_types.h>        /* htc_endpoint */
 #include <cdp_txrx_peer_ops.h>
 
-int ce_send_fast(struct CE_handle *copyeng, qdf_nbuf_t *msdus,
-		 unsigned int num_msdus, unsigned int transfer_id);
+int ce_send_fast(struct CE_handle *copyeng, qdf_nbuf_t msdu,
+		 unsigned int transfer_id, uint32_t download_len);
 #endif  /* WLAN_FEATURE_FASTPATH */
 
 /*
@@ -141,10 +141,8 @@ static inline uint8_t ol_tx_prepare_tso(ol_txrx_vdev_handle vdev,
  */
 qdf_nbuf_t ol_tx_data(ol_txrx_vdev_handle vdev, qdf_nbuf_t skb)
 {
-	void *qdf_ctx = cds_get_context(QDF_MODULE_ID_QDF_DEVICE);
 	struct ol_txrx_pdev_t *pdev;
 	qdf_nbuf_t ret;
-	QDF_STATUS status;
 
 	if (qdf_unlikely(!vdev)) {
 		QDF_TRACE(QDF_MODULE_ID_TXRX, QDF_TRACE_LEVEL_WARN,
@@ -159,18 +157,6 @@ qdf_nbuf_t ol_tx_data(ol_txrx_vdev_handle vdev, qdf_nbuf_t skb)
 			"%s:pdev is null", __func__);
 		return skb;
 	}
-	if (qdf_unlikely(!qdf_ctx)) {
-		TXRX_PRINT(TXRX_PRINT_LEVEL_ERR,
-			"%s:qdf_ctx is null", __func__);
-		return skb;
-	}
-
-	status = qdf_nbuf_map_single(qdf_ctx, skb, QDF_DMA_TO_DEVICE);
-	if (qdf_unlikely(status != QDF_STATUS_SUCCESS)) {
-		QDF_TRACE(QDF_MODULE_ID_TXRX, QDF_TRACE_LEVEL_WARN,
-			"%s: nbuf map failed", __func__);
-		return skb;
-	}
 
 	if ((ol_cfg_is_ip_tcp_udp_checksum_offload_enabled(pdev->ctrl_pdev))
 		&& (qdf_nbuf_get_protocol(skb) == htons(ETH_P_IP))
@@ -183,7 +169,6 @@ qdf_nbuf_t ol_tx_data(ol_txrx_vdev_handle vdev, qdf_nbuf_t skb)
 	if (ret) {
 		QDF_TRACE(QDF_MODULE_ID_TXRX, QDF_TRACE_LEVEL_WARN,
 			"%s: Failed to tx", __func__);
-		qdf_nbuf_unmap_single(qdf_ctx, ret, QDF_DMA_TO_DEVICE);
 		return ret;
 	}
 
@@ -384,6 +369,7 @@ ol_tx_prepare_ll_fast(struct ol_txrx_pdev_t *pdev,
 	uint32_t *htt_tx_desc;
 	void *htc_hdr_vaddr;
 	u_int32_t num_frags, i;
+	enum extension_header_type type;
 
 	tx_desc = ol_tx_desc_alloc_wrapper(pdev, vdev, msdu_info);
 	if (qdf_unlikely(!tx_desc))
@@ -410,13 +396,15 @@ ol_tx_prepare_ll_fast(struct ol_txrx_pdev_t *pdev,
 	/* HTT Header */
 	/* TODO : Take care of multiple fragments */
 
+	type = ol_tx_get_ext_header_type(vdev, msdu);
+
 	/* TODO: Precompute and store paddr in ol_tx_desc_t */
 	/* Virtual address of the HTT/HTC header, added by driver */
 	htc_hdr_vaddr = (char *)htt_tx_desc - HTC_HEADER_LEN;
 	htt_tx_desc_init(pdev->htt_pdev, htt_tx_desc,
 			 tx_desc->htt_tx_desc_paddr, tx_desc->id, msdu,
 			 &msdu_info->htt, &msdu_info->tso_info,
-			NULL, vdev->opmode == wlan_op_mode_ocb);
+			 NULL, type);
 
 	num_frags = qdf_nbuf_get_num_frags(msdu);
 	/* num_frags are expected to be 2 max */
@@ -447,6 +435,12 @@ ol_tx_prepare_ll_fast(struct ol_txrx_pdev_t *pdev,
 
 			frag_len = qdf_nbuf_get_frag_len(msdu, i);
 			frag_paddr = qdf_nbuf_get_frag_paddr(msdu, i);
+			if (type != EXT_HEADER_NOT_PRESENT) {
+				frag_paddr +=
+				    sizeof(struct htt_tx_msdu_desc_ext_t);
+				frag_len -=
+				    sizeof(struct htt_tx_msdu_desc_ext_t);
+			}
 #if defined(HELIUMPLUS_PADDR64)
 			htt_tx_desc_frag(pdev->htt_pdev, tx_desc->htt_frag_desc,
 					 i - 1, frag_paddr, frag_len);
@@ -473,6 +467,11 @@ ol_tx_prepare_ll_fast(struct ol_txrx_pdev_t *pdev,
 	/*
 	 * TODO : Can we remove this check and always download a fixed length ?
 	 * */
+
+
+	if (QDF_NBUF_CB_TX_EXTRA_FRAG_FLAGS_EXT_HEADER(msdu))
+		pkt_download_len += sizeof(struct htt_tx_msdu_desc_ext_t);
+
 	if (qdf_unlikely(qdf_nbuf_len(msdu) < pkt_download_len))
 		pkt_download_len = qdf_nbuf_len(msdu);
 
@@ -589,9 +588,14 @@ ol_tx_ll_fast(ol_txrx_vdev_handle vdev, qdf_nbuf_t msdu_list)
 				 * data being downloaded to the target via the
 				 * HTT tx descriptor.
 				 */
+				if (QDF_NBUF_CB_TX_EXTRA_FRAG_FLAGS_EXT_HEADER
+									 (msdu))
+					pkt_download_len +=
+					  sizeof(struct htt_tx_msdu_desc_ext_t);
+
 				htt_tx_desc_display(tx_desc->htt_tx_desc);
-				if ((0 == ce_send_fast(pdev->ce_tx_hdl, &msdu,
-						       1, ep_id))) {
+				if ((0 == ce_send_fast(pdev->ce_tx_hdl, msdu,
+						ep_id, pkt_download_len))) {
 					/*
 					 * The packet could not be sent.
 					 * Free the descriptor, return the
@@ -687,6 +691,10 @@ ol_tx_ll_fast(ol_txrx_vdev_handle vdev, qdf_nbuf_t msdu_list)
 			 * If debug display is enabled, show the meta-data being
 			 * downloaded to the target via the HTT tx descriptor.
 			 */
+			if (QDF_NBUF_CB_TX_EXTRA_FRAG_FLAGS_EXT_HEADER(msdu))
+				pkt_download_len +=
+				   sizeof(struct htt_tx_msdu_desc_ext_t);
+
 			htt_tx_desc_display(tx_desc->htt_tx_desc);
 			/*
 			 * The netbuf may get linked into a different list
@@ -694,8 +702,8 @@ ol_tx_ll_fast(ol_txrx_vdev_handle vdev, qdf_nbuf_t msdu_list)
 			 * pointer before the ce_send call.
 			 */
 			next = qdf_nbuf_next(msdu);
-			if ((0 == ce_send_fast(pdev->ce_tx_hdl, &msdu, 1,
-					       ep_id))) {
+			if ((0 == ce_send_fast(pdev->ce_tx_hdl, msdu,
+					       ep_id, pkt_download_len))) {
 				/* The packet could not be sent */
 				/* Free the descriptor, return the packet to the
 				 * caller */
@@ -1340,7 +1348,7 @@ ol_txrx_mgmt_send_ext(ol_txrx_vdev_handle vdev,
 
 	tx_msdu_info.peer = NULL;
 
-	qdf_nbuf_map_single(pdev->osdev, tx_mgmt_frm, QDF_DMA_TO_DEVICE);
+
 	/* For LL tx_comp_req is not used so initialized to 0 */
 	tx_msdu_info.htt.action.tx_comp_req = 0;
 	tx_desc = ol_tx_desc_ll(pdev, vdev, tx_mgmt_frm, &tx_msdu_info);
@@ -1371,11 +1379,9 @@ ol_txrx_mgmt_send_ext(ol_txrx_vdev_handle vdev,
 			tx_desc);
 #endif /* defined(HELIUMPLUS_PADDR64) */
 	}
-	if (!tx_desc) {
-		qdf_nbuf_unmap_single(pdev->osdev, tx_mgmt_frm,
-				      QDF_DMA_TO_DEVICE);
+	if (!tx_desc)
 		return -EINVAL;       /* can't accept the tx mgmt frame */
-	}
+
 	TXRX_STATS_MSDU_INCR(pdev, tx.mgmt, tx_mgmt_frm);
 	TXRX_ASSERT1(type < OL_TXRX_MGMT_NUM_TYPES);
 	tx_desc->pkt_type = type + OL_TXRX_MGMT_TYPE_BASE;
diff --git a/core/dp/txrx/ol_tx_desc.c b/core/dp/txrx/ol_tx_desc.c
index a1d71ba61b4c..5635abc61b8d 100644
--- a/core/dp/txrx/ol_tx_desc.c
+++ b/core/dp/txrx/ol_tx_desc.c
@@ -327,6 +327,59 @@ const uint32_t htt_to_ce_pkt_type[] = {
 	[htt_pkt_num_types] = 0xffffffff
 };
 
+#define WISA_DEST_PORT_6MBPS	50000
+#define WISA_DEST_PORT_24MBPS	50001
+
+/**
+ * ol_tx_get_wisa_ext_hdr_type() - get header type for WiSA mode
+ * @netbuf: network buffer
+ *
+ * Return: extension header type
+ */
+enum extension_header_type
+ol_tx_get_wisa_ext_hdr_type(qdf_nbuf_t netbuf)
+{
+	uint8_t *buf = qdf_nbuf_data(netbuf);
+	uint16_t dport;
+
+	if (qdf_is_macaddr_group(
+		(struct qdf_mac_addr *)(buf + QDF_NBUF_DEST_MAC_OFFSET))) {
+
+		dport = (uint16_t)(*(uint16_t *)(buf +
+			QDF_NBUF_TRAC_IPV4_OFFSET +
+			QDF_NBUF_TRAC_IPV4_HEADER_SIZE + sizeof(uint16_t)));
+
+		if (dport == QDF_SWAP_U16(WISA_DEST_PORT_6MBPS))
+			return WISA_MODE_EXT_HEADER_6MBPS;
+		else if (dport == QDF_SWAP_U16(WISA_DEST_PORT_24MBPS))
+			return WISA_MODE_EXT_HEADER_24MBPS;
+		else
+			return EXT_HEADER_NOT_PRESENT;
+	} else {
+		return EXT_HEADER_NOT_PRESENT;
+	}
+}
+
+/**
+ * ol_tx_get_ext_header_type() - extension header is required or not
+ * @vdev: vdev pointer
+ * @netbuf: network buffer
+ *
+ * This function returns header type and if extension header is
+ * not required than returns EXT_HEADER_NOT_PRESENT.
+ *
+ * Return: extension header type
+ */
+enum extension_header_type
+ol_tx_get_ext_header_type(struct ol_txrx_vdev_t *vdev,
+	qdf_nbuf_t netbuf)
+{
+	if (vdev->is_wisa_mode_enable == true)
+		return ol_tx_get_wisa_ext_hdr_type(netbuf);
+	else
+		return EXT_HEADER_NOT_PRESENT;
+}
+
 struct ol_tx_desc_t *ol_tx_desc_ll(struct ol_txrx_pdev_t *pdev,
 				   struct ol_txrx_vdev_t *vdev,
 				   qdf_nbuf_t netbuf,
@@ -335,6 +388,7 @@ struct ol_tx_desc_t *ol_tx_desc_ll(struct ol_txrx_pdev_t *pdev,
 	struct ol_tx_desc_t *tx_desc;
 	unsigned int i;
 	uint32_t num_frags;
+	enum extension_header_type type;
 
 	msdu_info->htt.info.vdev_id = vdev->vdev_id;
 	msdu_info->htt.action.cksum_offload = qdf_nbuf_get_tx_cksum(netbuf);
@@ -369,12 +423,13 @@ struct ol_tx_desc_t *ol_tx_desc_ll(struct ol_txrx_pdev_t *pdev,
 		tx_desc->pkt_type = OL_TX_FRM_STD;
 	}
 
+	type = ol_tx_get_ext_header_type(vdev, netbuf);
+
 	/* initialize the HW tx descriptor */
 	htt_tx_desc_init(pdev->htt_pdev, tx_desc->htt_tx_desc,
 			 tx_desc->htt_tx_desc_paddr,
 			 ol_tx_desc_id(pdev, tx_desc), netbuf, &msdu_info->htt,
-			 &msdu_info->tso_info,
-			 NULL, vdev->opmode == wlan_op_mode_ocb);
+			 &msdu_info->tso_info, NULL, type);
 
 	/*
 	 * Initialize the fragmentation descriptor.
diff --git a/core/dp/txrx/ol_tx_desc.h b/core/dp/txrx/ol_tx_desc.h
index ed726503ae6d..2509fecdb484 100644
--- a/core/dp/txrx/ol_tx_desc.h
+++ b/core/dp/txrx/ol_tx_desc.h
@@ -36,6 +36,7 @@
 #include <qdf_nbuf.h>           /* qdf_nbuf_t */
 #include <cdp_txrx_cmn.h>       /* ol_txrx_vdev_t, etc. */
 #include <ol_txrx_internal.h>   /*TXRX_ASSERT2 */
+#include <ol_htt_tx_api.h>
 
 #define DIV_BY_8	3
 #define DIV_BY_32	5
@@ -374,4 +375,11 @@ void ol_tx_desc_dup_detect_reset(struct ol_txrx_pdev_t *pdev,
 }
 #endif
 
+enum extension_header_type
+ol_tx_get_ext_header_type(struct ol_txrx_vdev_t *vdev,
+	qdf_nbuf_t netbuf);
+enum extension_header_type
+ol_tx_get_wisa_ext_type(qdf_nbuf_t netbuf);
+
+
 #endif /* _OL_TX_DESC__H_ */
diff --git a/core/dp/txrx/ol_txrx.c b/core/dp/txrx/ol_txrx.c
index d0133c9a62c6..0a4b6f7f75a0 100644
--- a/core/dp/txrx/ol_txrx.c
+++ b/core/dp/txrx/ol_txrx.c
@@ -559,9 +559,6 @@ ol_txrx_pdev_post_attach(ol_txrx_pdev_handle pdev)
 	if (ret)
 		goto ol_attach_fail;
 
-	/* Update bus pkt download length */
-	hif_bus_pkt_dl_len_set((void *)osc, htt_pkt_dl_len_get(pdev->htt_pdev));
-
 	/* Attach micro controller data path offload resource */
 	if (ol_cfg_ipa_uc_offload_enabled(pdev->ctrl_pdev))
 		if (htt_ipa_uc_attach(pdev->htt_pdev))
@@ -4020,3 +4017,19 @@ ol_txrx_vdev_handle ol_txrx_get_vdev_from_vdev_id(uint8_t vdev_id)
 
 	return vdev;
 }
+
+/**
+ * ol_txrx_set_wisa_mode() - set wisa mode
+ * @vdev: vdev handle
+ * @enable: enable flag
+ *
+ * Return: QDF STATUS
+ */
+QDF_STATUS ol_txrx_set_wisa_mode(ol_txrx_vdev_handle vdev, bool enable)
+{
+	if (!vdev)
+		return QDF_STATUS_E_INVAL;
+
+	vdev->is_wisa_mode_enable = enable;
+	return QDF_STATUS_SUCCESS;
+}
diff --git a/core/dp/txrx/ol_txrx.h b/core/dp/txrx/ol_txrx.h
index 41f8aa5cd486..791a0ecb2395 100644
--- a/core/dp/txrx/ol_txrx.h
+++ b/core/dp/txrx/ol_txrx.h
@@ -40,6 +40,7 @@ void ol_txrx_peer_unref_delete(struct ol_txrx_peer_t *peer);
 
 ol_txrx_vdev_handle ol_txrx_get_vdev_from_vdev_id(uint8_t vdev_id);
 
-
 void htt_pkt_log_init(struct ol_txrx_pdev_t *handle, void *scn);
+QDF_STATUS ol_txrx_set_wisa_mode(ol_txrx_vdev_handle vdev,
+			bool enable);
 #endif /* _OL_TXRX__H_ */
diff --git a/core/dp/txrx/ol_txrx_types.h b/core/dp/txrx/ol_txrx_types.h
index f66c755059ad..042715286577 100644
--- a/core/dp/txrx/ol_txrx_types.h
+++ b/core/dp/txrx/ol_txrx_types.h
@@ -880,10 +880,10 @@ struct ol_txrx_vdev_t {
 #ifdef QCA_LL_TX_FLOW_CONTROL_V2
 	struct ol_tx_flow_pool_t *pool;
 #endif
-
 	/* intra bss forwarded tx and rx packets count */
 	uint64_t fwd_tx_packets;
 	uint64_t fwd_rx_packets;
+	bool is_wisa_mode_enable;
 };
 
 struct ol_rx_reorder_array_elem_t {
diff --git a/core/wma/src/wma_data.c b/core/wma/src/wma_data.c
index f077249bd408..7ffe857a8f11 100644
--- a/core/wma/src/wma_data.c
+++ b/core/wma/src/wma_data.c
@@ -2575,9 +2575,6 @@ QDF_STATUS wma_tx_packet(void *wma_context, void *tx_frame, uint16_t frmLen,
 		/* Zero out skb's context buffer for the driver to use */
 		qdf_mem_set(skb->cb, sizeof(skb->cb), 0);
 
-		/* Do the DMA Mapping */
-		qdf_nbuf_map_single(pdev->osdev, skb, QDF_DMA_TO_DEVICE);
-
 		/* Terminate the (single-element) list of tx frames */
 		skb->next = NULL;
 
@@ -2593,8 +2590,6 @@ QDF_STATUS wma_tx_packet(void *wma_context, void *tx_frame, uint16_t frmLen,
 
 		if (ret) {
 			WMA_LOGE("TxRx Rejected. Fail to do Tx");
-			qdf_nbuf_unmap_single(pdev->osdev, skb,
-					      QDF_DMA_TO_DEVICE);
 			/* Call Download Cb so that umac can free the buffer */
 			if (tx_frm_download_comp_cb)
 				tx_frm_download_comp_cb(wma_handle->mac_context,