ath10k: Add support for htt_data_tx_desc_64 descriptor

WCN3990 target uses 64 bit frags_paddr in htt tx descriptor,
which holds the physical address of SKB fragments in tx data path.

In order to support 64 bit bit frags_paddr in htt tx descriptor, define
htt_data_tx_desc_64 descriptor and ath10k_htt_tx_64 method for handling
tx data path with new descriptor fields.
Signed-off-by: Govind Singh <govinds@qti.qualcomm.com>
Signed-off-by: Kalle Valo <kvalo@qca.qualcomm.com>

drivers/net/wireless/ath/ath10k/htt.h

@@ -187,6 +187,22 @@ struct htt_data_tx_desc {
 	u8 prefetch[0]; /* start of frame, for FW classification engine */
 } __packed;
 
+struct htt_data_tx_desc_64 {
+	u8 flags0; /* %HTT_DATA_TX_DESC_FLAGS0_ */
+	__le16 flags1; /* %HTT_DATA_TX_DESC_FLAGS1_ */
+	__le16 len;
+	__le16 id;
+	__le64 frags_paddr;
+	union {
+		__le32 peerid;
+		struct {
+			__le16 peerid;
+			__le16 freq;
+		} __packed offchan_tx;
+	} __packed;
+	u8 prefetch[0]; /* start of frame, for FW classification engine */
+} __packed;
+
 enum htt_rx_ring_flags {
 	HTT_RX_RING_FLAGS_MAC80211_HDR = 1 << 0,
 	HTT_RX_RING_FLAGS_MSDU_PAYLOAD = 1 << 1,
@@ -1648,13 +1664,20 @@ struct htt_peer_unmap_event {
 	u16 peer_id;
 };
 
-struct ath10k_htt_txbuf {
+struct ath10k_htt_txbuf_32 {
 	struct htt_data_tx_desc_frag frags[2];
 	struct ath10k_htc_hdr htc_hdr;
 	struct htt_cmd_hdr cmd_hdr;
 	struct htt_data_tx_desc cmd_tx;
 } __packed;
 
+struct ath10k_htt_txbuf_64 {
+	struct htt_data_tx_desc_frag frags[2];
+	struct ath10k_htc_hdr htc_hdr;
+	struct htt_cmd_hdr cmd_hdr;
+	struct htt_data_tx_desc_64 cmd_tx;
+} __packed;
+
 struct ath10k_htt {
 	struct ath10k *ar;
 	enum ath10k_htc_ep_id eid;
@@ -1785,7 +1808,11 @@ struct ath10k_htt {
 
 	struct {
 		dma_addr_t paddr;
-		struct ath10k_htt_txbuf *vaddr;
+		union {
+			struct ath10k_htt_txbuf_32 *vaddr_txbuff_32;
+			struct ath10k_htt_txbuf_64 *vaddr_txbuff_64;
+		};
+		size_t size;
 	} txbuf;
 
 	struct {
@@ -1808,6 +1835,10 @@ struct ath10k_htt_tx_ops {
 	int (*htt_send_frag_desc_bank_cfg)(struct ath10k_htt *htt);
 	int (*htt_alloc_frag_desc)(struct ath10k_htt *htt);
 	void (*htt_free_frag_desc)(struct ath10k_htt *htt);
+	int (*htt_tx)(struct ath10k_htt *htt, enum ath10k_hw_txrx_mode txmode,
+		      struct sk_buff *msdu);
+	int (*htt_alloc_txbuff)(struct ath10k_htt *htt);
+	void (*htt_free_txbuff)(struct ath10k_htt *htt);
 };
 
 #define RX_HTT_HDR_STATUS_LEN 64
@@ -1912,9 +1943,6 @@ int ath10k_htt_tx_mgmt_inc_pending(struct ath10k_htt *htt, bool is_mgmt,
 int ath10k_htt_tx_alloc_msdu_id(struct ath10k_htt *htt, struct sk_buff *skb);
 void ath10k_htt_tx_free_msdu_id(struct ath10k_htt *htt, u16 msdu_id);
 int ath10k_htt_mgmt_tx(struct ath10k_htt *htt, struct sk_buff *msdu);
-int ath10k_htt_tx(struct ath10k_htt *htt,
-		  enum ath10k_hw_txrx_mode txmode,
-		  struct sk_buff *msdu);
 void ath10k_htt_rx_pktlog_completion_handler(struct ath10k *ar,
 					     struct sk_buff *skb);
 int ath10k_htt_txrx_compl_task(struct ath10k *ar, int budget);

drivers/net/wireless/ath/ath10k/mac.c

@@ -3597,7 +3597,7 @@ static int ath10k_mac_tx_submit(struct ath10k *ar,
 
 	switch (txpath) {
 	case ATH10K_MAC_TX_HTT:
-		ret = ath10k_htt_tx(htt, txmode, skb);
+		ret = htt->tx_ops->htt_tx(htt, txmode, skb);
 		break;
 	case ATH10K_MAC_TX_HTT_MGMT:
 		ret = ath10k_htt_mgmt_tx(htt, skb);