net-next/hinic: add checksum offload and TSO support

This patch adds checksum offload and TSO support for the HiNIC
driver. Perfomance test (Iperf) shows more than 100% improvement
in TCP streams.
Signed-off-by: Zhao Chen <zhaochen6@huawei.com>
Signed-off-by: Xue Chaojing <xuechaojing@huawei.com>
Signed-off-by: David S. Miller <davem@davemloft.net>

drivers/net/ethernet/huawei/hinic/hinic_hw_dev.h

@@ -58,6 +58,8 @@ enum hinic_port_cmd {
 
 	HINIC_PORT_CMD_GET_GLOBAL_QPN   = 102,
 
+	HINIC_PORT_CMD_SET_TSO          = 112,
+
 	HINIC_PORT_CMD_GET_CAP          = 170,
 };
 

drivers/net/ethernet/huawei/hinic/hinic_hw_qp.c

@@ -70,8 +70,6 @@
 #define SQ_MASKED_IDX(sq, idx)  ((idx) & (sq)->wq->mask)
 #define RQ_MASKED_IDX(rq, idx)  ((idx) & (rq)->wq->mask)
 
-#define TX_MAX_MSS_DEFAULT      0x3E00
-
 enum sq_wqe_type {
 	SQ_NORMAL_WQE = 0,
 };
@@ -494,33 +492,16 @@ static void sq_prepare_ctrl(struct hinic_sq_ctrl *ctrl, u16 prod_idx,
 			  HINIC_SQ_CTRL_SET(SQ_NORMAL_WQE, DATA_FORMAT)     |
 			  HINIC_SQ_CTRL_SET(ctrl_size, LEN);
 
-	ctrl->queue_info = HINIC_SQ_CTRL_SET(TX_MAX_MSS_DEFAULT,
-					     QUEUE_INFO_MSS);
+	ctrl->queue_info = HINIC_SQ_CTRL_SET(HINIC_MSS_DEFAULT,
+					     QUEUE_INFO_MSS) |
+			   HINIC_SQ_CTRL_SET(1, QUEUE_INFO_UC);
 }
 
 static void sq_prepare_task(struct hinic_sq_task *task)
 {
-	task->pkt_info0 =
-		HINIC_SQ_TASK_INFO0_SET(0, L2HDR_LEN) |
-		HINIC_SQ_TASK_INFO0_SET(HINIC_L4_OFF_DISABLE, L4_OFFLOAD) |
-		HINIC_SQ_TASK_INFO0_SET(HINIC_OUTER_L3TYPE_UNKNOWN,
-					INNER_L3TYPE) |
-		HINIC_SQ_TASK_INFO0_SET(HINIC_VLAN_OFF_DISABLE,
-					VLAN_OFFLOAD) |
-		HINIC_SQ_TASK_INFO0_SET(HINIC_PKT_NOT_PARSED, PARSE_FLAG);
-
-	task->pkt_info1 =
-		HINIC_SQ_TASK_INFO1_SET(HINIC_MEDIA_UNKNOWN, MEDIA_TYPE) |
-		HINIC_SQ_TASK_INFO1_SET(0, INNER_L4_LEN) |
-		HINIC_SQ_TASK_INFO1_SET(0, INNER_L3_LEN);
-
-	task->pkt_info2 =
-		HINIC_SQ_TASK_INFO2_SET(0, TUNNEL_L4_LEN) |
-		HINIC_SQ_TASK_INFO2_SET(0, OUTER_L3_LEN)  |
-		HINIC_SQ_TASK_INFO2_SET(HINIC_TUNNEL_L4TYPE_UNKNOWN,
-					TUNNEL_L4TYPE)    |
-		HINIC_SQ_TASK_INFO2_SET(HINIC_OUTER_L3TYPE_UNKNOWN,
-					OUTER_L3TYPE);
+	task->pkt_info0 = 0;
+	task->pkt_info1 = 0;
+	task->pkt_info2 = 0;
 
 	task->ufo_v6_identify = 0;
 
@@ -529,6 +510,86 @@ static void sq_prepare_task(struct hinic_sq_task *task)
 	task->zero_pad = 0;
 }
 
+void hinic_task_set_l2hdr(struct hinic_sq_task *task, u32 len)
+{
+	task->pkt_info0 |= HINIC_SQ_TASK_INFO0_SET(len, L2HDR_LEN);
+}
+
+void hinic_task_set_outter_l3(struct hinic_sq_task *task,
+			      enum hinic_l3_offload_type l3_type,
+			      u32 network_len)
+{
+	task->pkt_info2 |= HINIC_SQ_TASK_INFO2_SET(l3_type, OUTER_L3TYPE) |
+			   HINIC_SQ_TASK_INFO2_SET(network_len, OUTER_L3LEN);
+}
+
+void hinic_task_set_inner_l3(struct hinic_sq_task *task,
+			     enum hinic_l3_offload_type l3_type,
+			     u32 network_len)
+{
+	task->pkt_info0 |= HINIC_SQ_TASK_INFO0_SET(l3_type, INNER_L3TYPE);
+	task->pkt_info1 |= HINIC_SQ_TASK_INFO1_SET(network_len, INNER_L3LEN);
+}
+
+void hinic_task_set_tunnel_l4(struct hinic_sq_task *task,
+			      enum hinic_l4_offload_type l4_type,
+			      u32 tunnel_len)
+{
+	task->pkt_info2 |= HINIC_SQ_TASK_INFO2_SET(l4_type, TUNNEL_L4TYPE) |
+			   HINIC_SQ_TASK_INFO2_SET(tunnel_len, TUNNEL_L4LEN);
+}
+
+void hinic_set_cs_inner_l4(struct hinic_sq_task *task, u32 *queue_info,
+			   enum hinic_l4_offload_type l4_offload,
+			   u32 l4_len, u32 offset)
+{
+	u32 tcp_udp_cs = 0, sctp = 0;
+	u32 mss = HINIC_MSS_DEFAULT;
+
+	if (l4_offload == TCP_OFFLOAD_ENABLE ||
+	    l4_offload == UDP_OFFLOAD_ENABLE)
+		tcp_udp_cs = 1;
+	else if (l4_offload == SCTP_OFFLOAD_ENABLE)
+		sctp = 1;
+
+	task->pkt_info0 |= HINIC_SQ_TASK_INFO0_SET(l4_offload, L4_OFFLOAD);
+	task->pkt_info1 |= HINIC_SQ_TASK_INFO1_SET(l4_len, INNER_L4LEN);
+
+	*queue_info |= HINIC_SQ_CTRL_SET(offset, QUEUE_INFO_PLDOFF) |
+		       HINIC_SQ_CTRL_SET(tcp_udp_cs, QUEUE_INFO_TCPUDP_CS) |
+		       HINIC_SQ_CTRL_SET(sctp, QUEUE_INFO_SCTP);
+
+	*queue_info = HINIC_SQ_CTRL_CLEAR(*queue_info, QUEUE_INFO_MSS);
+	*queue_info |= HINIC_SQ_CTRL_SET(mss, QUEUE_INFO_MSS);
+}
+
+void hinic_set_tso_inner_l4(struct hinic_sq_task *task, u32 *queue_info,
+			    enum hinic_l4_offload_type l4_offload,
+			    u32 l4_len, u32 offset, u32 ip_ident, u32 mss)
+{
+	u32 tso = 0, ufo = 0;
+
+	if (l4_offload == TCP_OFFLOAD_ENABLE)
+		tso = 1;
+	else if (l4_offload == UDP_OFFLOAD_ENABLE)
+		ufo = 1;
+
+	task->ufo_v6_identify = ip_ident;
+
+	task->pkt_info0 |= HINIC_SQ_TASK_INFO0_SET(l4_offload, L4_OFFLOAD);
+	task->pkt_info0 |= HINIC_SQ_TASK_INFO0_SET(tso || ufo, TSO_FLAG);
+	task->pkt_info1 |= HINIC_SQ_TASK_INFO1_SET(l4_len, INNER_L4LEN);
+
+	*queue_info |= HINIC_SQ_CTRL_SET(offset, QUEUE_INFO_PLDOFF) |
+		       HINIC_SQ_CTRL_SET(tso, QUEUE_INFO_TSO) |
+		       HINIC_SQ_CTRL_SET(ufo, QUEUE_INFO_UFO) |
+		       HINIC_SQ_CTRL_SET(!!l4_offload, QUEUE_INFO_TCPUDP_CS);
+
+	/* set MSS value */
+	*queue_info = HINIC_SQ_CTRL_CLEAR(*queue_info, QUEUE_INFO_MSS);
+	*queue_info |= HINIC_SQ_CTRL_SET(mss, QUEUE_INFO_MSS);
+}
+
 /**
  * hinic_sq_prepare_wqe - prepare wqe before insert to the queue
  * @sq: send queue
@@ -612,6 +673,16 @@ struct hinic_sq_wqe *hinic_sq_get_wqe(struct hinic_sq *sq,
 	return &hw_wqe->sq_wqe;
 }
 
+/**
+ * hinic_sq_return_wqe - return the wqe to the sq
+ * @sq: send queue
+ * @wqe_size: the size of the wqe
+ **/
+void hinic_sq_return_wqe(struct hinic_sq *sq, unsigned int wqe_size)
+{
+	hinic_return_wqe(sq->wq, wqe_size);
+}
+
 /**
  * hinic_sq_write_wqe - write the wqe to the sq
  * @sq: send queue

drivers/net/ethernet/huawei/hinic/hinic_hw_qp.h

@@ -149,6 +149,31 @@ int hinic_get_sq_free_wqebbs(struct hinic_sq *sq);
 
 int hinic_get_rq_free_wqebbs(struct hinic_rq *rq);
 
+void hinic_task_set_l2hdr(struct hinic_sq_task *task, u32 len);
+
+void hinic_task_set_outter_l3(struct hinic_sq_task *task,
+			      enum hinic_l3_offload_type l3_type,
+			      u32 network_len);
+
+void hinic_task_set_inner_l3(struct hinic_sq_task *task,
+			     enum hinic_l3_offload_type l3_type,
+			     u32 network_len);
+
+void hinic_task_set_tunnel_l4(struct hinic_sq_task *task,
+			      enum hinic_l4_offload_type l4_type,
+			      u32 tunnel_len);
+
+void hinic_set_cs_inner_l4(struct hinic_sq_task *task,
+			   u32 *queue_info,
+			   enum hinic_l4_offload_type l4_offload,
+			   u32 l4_len, u32 offset);
+
+void hinic_set_tso_inner_l4(struct hinic_sq_task *task,
+			    u32 *queue_info,
+			    enum hinic_l4_offload_type l4_offload,
+			    u32 l4_len,
+			    u32 offset, u32 ip_ident, u32 mss);
+
 void hinic_sq_prepare_wqe(struct hinic_sq *sq, u16 prod_idx,
 			  struct hinic_sq_wqe *wqe, struct hinic_sge *sges,
 			  int nr_sges);
@@ -159,6 +184,8 @@ void hinic_sq_write_db(struct hinic_sq *sq, u16 prod_idx, unsigned int wqe_size,
 struct hinic_sq_wqe *hinic_sq_get_wqe(struct hinic_sq *sq,
 				      unsigned int wqe_size, u16 *prod_idx);
 
+void hinic_sq_return_wqe(struct hinic_sq *sq, unsigned int wqe_size);
+
 void hinic_sq_write_wqe(struct hinic_sq *sq, u16 prod_idx,
 			struct hinic_sq_wqe *wqe, struct sk_buff *skb,
 			unsigned int wqe_size);

drivers/net/ethernet/huawei/hinic/hinic_hw_wq.c

@@ -774,6 +774,20 @@ struct hinic_hw_wqe *hinic_get_wqe(struct hinic_wq *wq, unsigned int wqe_size,
 	return WQ_PAGE_ADDR(wq, *prod_idx) + WQE_PAGE_OFF(wq, *prod_idx);
 }
 
+/**
+ * hinic_return_wqe - return the wqe when transmit failed
+ * @wq: wq to return wqe
+ * @wqe_size: wqe size
+ **/
+void hinic_return_wqe(struct hinic_wq *wq, unsigned int wqe_size)
+{
+	int num_wqebbs = ALIGN(wqe_size, wq->wqebb_size) / wq->wqebb_size;
+
+	atomic_sub(num_wqebbs, &wq->prod_idx);
+
+	atomic_add(num_wqebbs, &wq->delta);
+}
+
 /**
  * hinic_put_wqe - return the wqe place to use for a new wqe
  * @wq: wq to return wqe

drivers/net/ethernet/huawei/hinic/hinic_hw_wq.h

@@ -104,6 +104,8 @@ void hinic_wq_free(struct hinic_wqs *wqs, struct hinic_wq *wq);
 struct hinic_hw_wqe *hinic_get_wqe(struct hinic_wq *wq, unsigned int wqe_size,
 				   u16 *prod_idx);
 
+void hinic_return_wqe(struct hinic_wq *wq, unsigned int wqe_size);
+
 void hinic_put_wqe(struct hinic_wq *wq, unsigned int wqe_size);
 
 struct hinic_hw_wqe *hinic_read_wqe(struct hinic_wq *wq, unsigned int wqe_size,

drivers/net/ethernet/huawei/hinic/hinic_hw_wqe.h

@@ -72,9 +72,23 @@
 #define HINIC_SQ_CTRL_DATA_FORMAT_MASK                 0x1
 #define HINIC_SQ_CTRL_LEN_MASK                         0x3
 
+#define HINIC_SQ_CTRL_QUEUE_INFO_PLDOFF_SHIFT          2
+#define HINIC_SQ_CTRL_QUEUE_INFO_UFO_SHIFT             10
+#define HINIC_SQ_CTRL_QUEUE_INFO_TSO_SHIFT             11
+#define HINIC_SQ_CTRL_QUEUE_INFO_TCPUDP_CS_SHIFT       12
 #define HINIC_SQ_CTRL_QUEUE_INFO_MSS_SHIFT             13
-
+#define HINIC_SQ_CTRL_QUEUE_INFO_SCTP_SHIFT            27
+#define HINIC_SQ_CTRL_QUEUE_INFO_UC_SHIFT              28
+#define HINIC_SQ_CTRL_QUEUE_INFO_PRI_SHIFT             29
+
+#define HINIC_SQ_CTRL_QUEUE_INFO_PLDOFF_MASK           0xFF
+#define HINIC_SQ_CTRL_QUEUE_INFO_UFO_MASK              0x1
+#define HINIC_SQ_CTRL_QUEUE_INFO_TSO_MASK              0x1
+#define HINIC_SQ_CTRL_QUEUE_INFO_TCPUDP_CS_MASK	       0x1
 #define HINIC_SQ_CTRL_QUEUE_INFO_MSS_MASK              0x3FFF
+#define HINIC_SQ_CTRL_QUEUE_INFO_SCTP_MASK             0x1
+#define HINIC_SQ_CTRL_QUEUE_INFO_UC_MASK               0x1
+#define HINIC_SQ_CTRL_QUEUE_INFO_PRI_MASK              0x7
 
 #define HINIC_SQ_CTRL_SET(val, member)          \
 		(((u32)(val) & HINIC_SQ_CTRL_##member##_MASK) \
@@ -84,6 +98,10 @@
 		(((val) >> HINIC_SQ_CTRL_##member##_SHIFT) \
 		 & HINIC_SQ_CTRL_##member##_MASK)
 
+#define HINIC_SQ_CTRL_CLEAR(val, member)	\
+		((u32)(val) & (~(HINIC_SQ_CTRL_##member##_MASK \
+		 << HINIC_SQ_CTRL_##member##_SHIFT)))
+
 #define HINIC_SQ_TASK_INFO0_L2HDR_LEN_SHIFT     0
 #define HINIC_SQ_TASK_INFO0_L4_OFFLOAD_SHIFT    8
 #define HINIC_SQ_TASK_INFO0_INNER_L3TYPE_SHIFT  10
@@ -108,28 +126,28 @@
 
 /* 8 bits reserved */
 #define HINIC_SQ_TASK_INFO1_MEDIA_TYPE_SHIFT    8
-#define HINIC_SQ_TASK_INFO1_INNER_L4_LEN_SHIFT  16
-#define HINIC_SQ_TASK_INFO1_INNER_L3_LEN_SHIFT  24
+#define HINIC_SQ_TASK_INFO1_INNER_L4LEN_SHIFT   16
+#define HINIC_SQ_TASK_INFO1_INNER_L3LEN_SHIFT   24
 
 /* 8 bits reserved */
 #define HINIC_SQ_TASK_INFO1_MEDIA_TYPE_MASK     0xFF
-#define HINIC_SQ_TASK_INFO1_INNER_L4_LEN_MASK   0xFF
-#define HINIC_SQ_TASK_INFO1_INNER_L3_LEN_MASK   0xFF
+#define HINIC_SQ_TASK_INFO1_INNER_L4LEN_MASK    0xFF
+#define HINIC_SQ_TASK_INFO1_INNER_L3LEN_MASK    0xFF
 
 #define HINIC_SQ_TASK_INFO1_SET(val, member)    \
 		(((u32)(val) & HINIC_SQ_TASK_INFO1_##member##_MASK) <<  \
 		 HINIC_SQ_TASK_INFO1_##member##_SHIFT)
 
-#define HINIC_SQ_TASK_INFO2_TUNNEL_L4_LEN_SHIFT 0
-#define HINIC_SQ_TASK_INFO2_OUTER_L3_LEN_SHIFT  12
-#define HINIC_SQ_TASK_INFO2_TUNNEL_L4TYPE_SHIFT 19
+#define HINIC_SQ_TASK_INFO2_TUNNEL_L4LEN_SHIFT  0
+#define HINIC_SQ_TASK_INFO2_OUTER_L3LEN_SHIFT   8
+#define HINIC_SQ_TASK_INFO2_TUNNEL_L4TYPE_SHIFT 16
 /* 1 bit reserved */
-#define HINIC_SQ_TASK_INFO2_OUTER_L3TYPE_SHIFT  22
+#define HINIC_SQ_TASK_INFO2_OUTER_L3TYPE_SHIFT  24
 /* 8 bits reserved */
 
-#define HINIC_SQ_TASK_INFO2_TUNNEL_L4_LEN_MASK  0xFFF
-#define HINIC_SQ_TASK_INFO2_OUTER_L3_LEN_MASK   0x7F
-#define HINIC_SQ_TASK_INFO2_TUNNEL_L4TYPE_MASK  0x3
+#define HINIC_SQ_TASK_INFO2_TUNNEL_L4LEN_MASK   0xFF
+#define HINIC_SQ_TASK_INFO2_OUTER_L3LEN_MASK    0xFF
+#define HINIC_SQ_TASK_INFO2_TUNNEL_L4TYPE_MASK  0x7
 /* 1 bit reserved */
 #define HINIC_SQ_TASK_INFO2_OUTER_L3TYPE_MASK   0x3
 /* 8 bits reserved */
@@ -194,6 +212,9 @@
 #define HINIC_SQ_WQE_MAX_SIZE                   320
 #define HINIC_RQ_WQE_SIZE                       32
 
+#define HINIC_MSS_DEFAULT		        0x3E00
+#define HINIC_MSS_MIN		                0x50
+
 enum hinic_l4offload_type {
 	HINIC_L4_OFF_DISABLE            = 0,
 	HINIC_TCP_OFFLOAD_ENABLE        = 1,
@@ -211,6 +232,26 @@ enum hinic_pkt_parsed {
 	HINIC_PKT_PARSED     = 1,
 };
 
+enum hinic_l3_offload_type {
+	L3TYPE_UNKNOWN = 0,
+	IPV6_PKT = 1,
+	IPV4_PKT_NO_CHKSUM_OFFLOAD = 2,
+	IPV4_PKT_WITH_CHKSUM_OFFLOAD = 3,
+};
+
+enum hinic_l4_offload_type {
+	OFFLOAD_DISABLE     = 0,
+	TCP_OFFLOAD_ENABLE  = 1,
+	SCTP_OFFLOAD_ENABLE = 2,
+	UDP_OFFLOAD_ENABLE  = 3,
+};
+
+enum hinic_l4_tunnel_type {
+	NOT_TUNNEL,
+	TUNNEL_UDP_NO_CSUM,
+	TUNNEL_UDP_CSUM,
+};
+
 enum hinic_outer_l3type {
 	HINIC_OUTER_L3TYPE_UNKNOWN              = 0,
 	HINIC_OUTER_L3TYPE_IPV6                 = 1,

drivers/net/ethernet/huawei/hinic/hinic_main.c

@@ -805,7 +805,8 @@ static const struct net_device_ops hinic_netdev_ops = {
 
 static void netdev_features_init(struct net_device *netdev)
 {
-	netdev->hw_features = NETIF_F_SG | NETIF_F_HIGHDMA;
+	netdev->hw_features = NETIF_F_SG | NETIF_F_HIGHDMA | NETIF_F_IP_CSUM |
+			      NETIF_F_IPV6_CSUM | NETIF_F_TSO | NETIF_F_TSO6;
 
 	netdev->vlan_features = netdev->hw_features;
 
@@ -863,6 +864,20 @@ static void link_status_event_handler(void *handle, void *buf_in, u16 in_size,
 	*out_size = sizeof(*ret_link_status);
 }
 
+static int set_features(struct hinic_dev *nic_dev,
+			netdev_features_t pre_features,
+			netdev_features_t features, bool force_change)
+{
+	netdev_features_t changed = force_change ? ~0 : pre_features ^ features;
+	int err = 0;
+
+	if (changed & NETIF_F_TSO)
+		err = hinic_port_set_tso(nic_dev, (features & NETIF_F_TSO) ?
+					 HINIC_TSO_ENABLE : HINIC_TSO_DISABLE);
+
+	return err;
+}
+
 /**
  * nic_dev_init - Initialize the NIC device
  * @pdev: the NIC pci device
@@ -963,7 +978,12 @@ static int nic_dev_init(struct pci_dev *pdev)
 	hinic_hwdev_cb_register(nic_dev->hwdev, HINIC_MGMT_MSG_CMD_LINK_STATUS,
 				nic_dev, link_status_event_handler);
 
+	err = set_features(nic_dev, 0, nic_dev->netdev->features, true);
+	if (err)
+		goto err_set_features;
+
 	SET_NETDEV_DEV(netdev, &pdev->dev);
+
 	err = register_netdev(netdev);
 	if (err) {
 		dev_err(&pdev->dev, "Failed to register netdev\n");
@@ -973,6 +993,7 @@ static int nic_dev_init(struct pci_dev *pdev)
 	return 0;
 
 err_reg_netdev:
+err_set_features:
 	hinic_hwdev_cb_unregister(nic_dev->hwdev,
 				  HINIC_MGMT_MSG_CMD_LINK_STATUS);
 	cancel_work_sync(&rx_mode_work->work);

drivers/net/ethernet/huawei/hinic/hinic_port.c

@@ -377,3 +377,35 @@ int hinic_port_get_cap(struct hinic_dev *nic_dev,
 
 	return 0;
 }
+
+/**
+ * hinic_port_set_tso - set port tso configuration
+ * @nic_dev: nic device
+ * @state: the tso state to set
+ *
+ * Return 0 - Success, negative - Failure
+ **/
+int hinic_port_set_tso(struct hinic_dev *nic_dev, enum hinic_tso_state state)
+{
+	struct hinic_hwdev *hwdev = nic_dev->hwdev;
+	struct hinic_hwif *hwif = hwdev->hwif;
+	struct hinic_tso_config tso_cfg = {0};
+	struct pci_dev *pdev = hwif->pdev;
+	u16 out_size;
+	int err;
+
+	tso_cfg.func_id = HINIC_HWIF_FUNC_IDX(hwif);
+	tso_cfg.tso_en = state;
+
+	err = hinic_port_msg_cmd(hwdev, HINIC_PORT_CMD_SET_TSO,
+				 &tso_cfg, sizeof(tso_cfg),
+				 &tso_cfg, &out_size);
+	if (err || out_size != sizeof(tso_cfg) || tso_cfg.status) {
+		dev_err(&pdev->dev,
+			"Failed to set port tso, ret = %d\n",
+			tso_cfg.status);
+		return -EINVAL;
+	}
+
+	return 0;
+}

drivers/net/ethernet/huawei/hinic/hinic_port.h

@@ -72,6 +72,11 @@ enum hinic_speed {
 	HINIC_SPEED_UNKNOWN = 0xFF,
 };
 
+enum hinic_tso_state {
+	HINIC_TSO_DISABLE = 0,
+	HINIC_TSO_ENABLE  = 1,
+};
+
 struct hinic_port_mac_cmd {
 	u8              status;
 	u8              version;
@@ -167,6 +172,17 @@ struct hinic_port_cap {
 	u8      rsvd2[3];
 };
 
+struct hinic_tso_config {
+	u8	status;
+	u8	version;
+	u8	rsvd0[6];
+
+	u16	func_id;
+	u16	rsvd1;
+	u8	tso_en;
+	u8	resv2[3];
+};
+
 int hinic_port_add_mac(struct hinic_dev *nic_dev, const u8 *addr,
 		       u16 vlan_id);
 
@@ -195,4 +211,6 @@ int hinic_port_set_func_state(struct hinic_dev *nic_dev,
 int hinic_port_get_cap(struct hinic_dev *nic_dev,
 		       struct hinic_port_cap *port_cap);
 
+int hinic_port_set_tso(struct hinic_dev *nic_dev, enum hinic_tso_state state);
+
 #endif

drivers/net/ethernet/huawei/hinic/hinic_tx.c

@@ -26,6 +26,13 @@
 #include <linux/skbuff.h>
 #include <linux/smp.h>
 #include <asm/byteorder.h>
+#include <linux/ip.h>
+#include <linux/tcp.h>
+#include <linux/sctp.h>
+#include <linux/ipv6.h>
+#include <net/ipv6.h>
+#include <net/checksum.h>
+#include <net/ip6_checksum.h>
 
 #include "hinic_common.h"
 #include "hinic_hw_if.h"
@@ -47,7 +54,29 @@
 
 #define HW_CONS_IDX(sq)                 be16_to_cpu(*(u16 *)((sq)->hw_ci_addr))
 
-#define MIN_SKB_LEN             64
+#define MIN_SKB_LEN                     17
+
+#define	MAX_PAYLOAD_OFFSET	        221
+#define TRANSPORT_OFFSET(l4_hdr, skb)	((u32)((l4_hdr) - (skb)->data))
+
+union hinic_l3 {
+	struct iphdr *v4;
+	struct ipv6hdr *v6;
+	unsigned char *hdr;
+};
+
+union hinic_l4 {
+	struct tcphdr *tcp;
+	struct udphdr *udp;
+	unsigned char *hdr;
+};
+
+enum hinic_offload_type {
+	TX_OFFLOAD_TSO     = BIT(0),
+	TX_OFFLOAD_CSUM    = BIT(1),
+	TX_OFFLOAD_VLAN    = BIT(2),
+	TX_OFFLOAD_INVALID = BIT(3),
+};
 
 /**
  * hinic_txq_clean_stats - Clean the statistics of specific queue
@@ -175,18 +204,263 @@ static void tx_unmap_skb(struct hinic_dev *nic_dev, struct sk_buff *skb,
 			 DMA_TO_DEVICE);
 }
 
+static void get_inner_l3_l4_type(struct sk_buff *skb, union hinic_l3 *ip,
+				 union hinic_l4 *l4,
+				 enum hinic_offload_type offload_type,
+				 enum hinic_l3_offload_type *l3_type,
+				 u8 *l4_proto)
+{
+	u8 *exthdr;
+
+	if (ip->v4->version == 4) {
+		*l3_type = (offload_type == TX_OFFLOAD_CSUM) ?
+			   IPV4_PKT_NO_CHKSUM_OFFLOAD :
+			   IPV4_PKT_WITH_CHKSUM_OFFLOAD;
+		*l4_proto = ip->v4->protocol;
+	} else if (ip->v4->version == 6) {
+		*l3_type = IPV6_PKT;
+		exthdr = ip->hdr + sizeof(*ip->v6);
+		*l4_proto = ip->v6->nexthdr;
+		if (exthdr != l4->hdr) {
+			int start = exthdr - skb->data;
+			__be16 frag_off;
+
+			ipv6_skip_exthdr(skb, start, l4_proto, &frag_off);
+		}
+	} else {
+		*l3_type = L3TYPE_UNKNOWN;
+		*l4_proto = 0;
+	}
+}
+
+static void get_inner_l4_info(struct sk_buff *skb, union hinic_l4 *l4,
+			      enum hinic_offload_type offload_type, u8 l4_proto,
+			      enum hinic_l4_offload_type *l4_offload,
+			      u32 *l4_len, u32 *offset)
+{
+	*l4_offload = OFFLOAD_DISABLE;
+	*offset = 0;
+	*l4_len = 0;
+
+	switch (l4_proto) {
+	case IPPROTO_TCP:
+		*l4_offload = TCP_OFFLOAD_ENABLE;
+		/* doff in unit of 4B */
+		*l4_len = l4->tcp->doff * 4;
+		*offset = *l4_len + TRANSPORT_OFFSET(l4->hdr, skb);
+		break;
+
+	case IPPROTO_UDP:
+		*l4_offload = UDP_OFFLOAD_ENABLE;
+		*l4_len = sizeof(struct udphdr);
+		*offset = TRANSPORT_OFFSET(l4->hdr, skb);
+		break;
+
+	case IPPROTO_SCTP:
+		/* only csum offload support sctp */
+		if (offload_type != TX_OFFLOAD_CSUM)
+			break;
+
+		*l4_offload = SCTP_OFFLOAD_ENABLE;
+		*l4_len = sizeof(struct sctphdr);
+		*offset = TRANSPORT_OFFSET(l4->hdr, skb);
+		break;
+
+	default:
+		break;
+	}
+}
+
+static __sum16 csum_magic(union hinic_l3 *ip, unsigned short proto)
+{
+	return (ip->v4->version == 4) ?
+		csum_tcpudp_magic(ip->v4->saddr, ip->v4->daddr, 0, proto, 0) :
+		csum_ipv6_magic(&ip->v6->saddr, &ip->v6->daddr, 0, proto, 0);
+}
+
+static int offload_tso(struct hinic_sq_task *task, u32 *queue_info,
+		       struct sk_buff *skb)
+{
+	u32 offset, l4_len, ip_identify, network_hdr_len;
+	enum hinic_l3_offload_type l3_offload;
+	enum hinic_l4_offload_type l4_offload;
+	union hinic_l3 ip;
+	union hinic_l4 l4;
+	u8 l4_proto;
+
+	if (!skb_is_gso(skb))
+		return 0;
+
+	if (skb_cow_head(skb, 0) < 0)
+		return -EPROTONOSUPPORT;
+
+	if (skb->encapsulation) {
+		u32 gso_type = skb_shinfo(skb)->gso_type;
+		u32 tunnel_type = 0;
+		u32 l4_tunnel_len;
+
+		ip.hdr = skb_network_header(skb);
+		l4.hdr = skb_transport_header(skb);
+		network_hdr_len = skb_inner_network_header_len(skb);
+
+		if (ip.v4->version == 4) {
+			ip.v4->tot_len = 0;
+			l3_offload = IPV4_PKT_WITH_CHKSUM_OFFLOAD;
+		} else if (ip.v4->version == 6) {
+			l3_offload = IPV6_PKT;
+		} else {
+			l3_offload = 0;
+		}
+
+		hinic_task_set_outter_l3(task, l3_offload,
+					 skb_network_header_len(skb));
+
+		if (gso_type & SKB_GSO_UDP_TUNNEL_CSUM) {
+			l4.udp->check = ~csum_magic(&ip, IPPROTO_UDP);
+			tunnel_type = TUNNEL_UDP_CSUM;
+		} else if (gso_type & SKB_GSO_UDP_TUNNEL) {
+			tunnel_type = TUNNEL_UDP_NO_CSUM;
+		}
+
+		l4_tunnel_len = skb_inner_network_offset(skb) -
+				skb_transport_offset(skb);
+		hinic_task_set_tunnel_l4(task, tunnel_type, l4_tunnel_len);
+
+		ip.hdr = skb_inner_network_header(skb);
+		l4.hdr = skb_inner_transport_header(skb);
+	} else {
+		ip.hdr = skb_network_header(skb);
+		l4.hdr = skb_transport_header(skb);
+		network_hdr_len = skb_network_header_len(skb);
+	}
+
+	/* initialize inner IP header fields */
+	if (ip.v4->version == 4)
+		ip.v4->tot_len = 0;
+	else
+		ip.v6->payload_len = 0;
+
+	get_inner_l3_l4_type(skb, &ip, &l4, TX_OFFLOAD_TSO, &l3_offload,
+			     &l4_proto);
+
+	hinic_task_set_inner_l3(task, l3_offload, network_hdr_len);
+
+	ip_identify = 0;
+	if (l4_proto == IPPROTO_TCP)
+		l4.tcp->check = ~csum_magic(&ip, IPPROTO_TCP);
+
+	get_inner_l4_info(skb, &l4, TX_OFFLOAD_TSO, l4_proto, &l4_offload,
+			  &l4_len, &offset);
+
+	hinic_set_tso_inner_l4(task, queue_info, l4_offload, l4_len, offset,
+			       ip_identify, skb_shinfo(skb)->gso_size);
+
+	return 1;
+}
+
+static int offload_csum(struct hinic_sq_task *task, u32 *queue_info,
+			struct sk_buff *skb)
+{
+	enum hinic_l4_offload_type l4_offload;
+	u32 offset, l4_len, network_hdr_len;
+	enum hinic_l3_offload_type l3_type;
+	union hinic_l3 ip;
+	union hinic_l4 l4;
+	u8 l4_proto;
+
+	if (skb->ip_summed != CHECKSUM_PARTIAL)
+		return 0;
+
+	if (skb->encapsulation) {
+		u32 l4_tunnel_len;
+
+		ip.hdr = skb_network_header(skb);
+
+		if (ip.v4->version == 4)
+			l3_type = IPV4_PKT_NO_CHKSUM_OFFLOAD;
+		else if (ip.v4->version == 6)
+			l3_type = IPV6_PKT;
+		else
+			l3_type = L3TYPE_UNKNOWN;
+
+		hinic_task_set_outter_l3(task, l3_type,
+					 skb_network_header_len(skb));
+
+		l4_tunnel_len = skb_inner_network_offset(skb) -
+				skb_transport_offset(skb);
+
+		hinic_task_set_tunnel_l4(task, TUNNEL_UDP_NO_CSUM,
+					 l4_tunnel_len);
+
+		ip.hdr = skb_inner_network_header(skb);
+		l4.hdr = skb_inner_transport_header(skb);
+		network_hdr_len = skb_inner_network_header_len(skb);
+	} else {
+		ip.hdr = skb_network_header(skb);
+		l4.hdr = skb_transport_header(skb);
+		network_hdr_len = skb_network_header_len(skb);
+	}
+
+	get_inner_l3_l4_type(skb, &ip, &l4, TX_OFFLOAD_CSUM, &l3_type,
+			     &l4_proto);
+
+	hinic_task_set_inner_l3(task, l3_type, network_hdr_len);
+
+	get_inner_l4_info(skb, &l4, TX_OFFLOAD_CSUM, l4_proto, &l4_offload,
+			  &l4_len, &offset);
+
+	hinic_set_cs_inner_l4(task, queue_info, l4_offload, l4_len, offset);
+
+	return 1;
+}
+
+static int hinic_tx_offload(struct sk_buff *skb, struct hinic_sq_task *task,
+			    u32 *queue_info)
+{
+	enum hinic_offload_type offload = 0;
+	int enabled;
+
+	enabled = offload_tso(task, queue_info, skb);
+	if (enabled > 0) {
+		offload |= TX_OFFLOAD_TSO;
+	} else if (enabled == 0) {
+		enabled = offload_csum(task, queue_info, skb);
+		if (enabled)
+			offload |= TX_OFFLOAD_CSUM;
+	} else {
+		return -EPROTONOSUPPORT;
+	}
+
+	if (offload)
+		hinic_task_set_l2hdr(task, skb_network_offset(skb));
+
+	/* payload offset should not more than 221 */
+	if (HINIC_SQ_CTRL_GET(*queue_info, QUEUE_INFO_PLDOFF) >
+	    MAX_PAYLOAD_OFFSET) {
+		return -EPROTONOSUPPORT;
+	}
+
+	/* mss should not less than 80 */
+	if (HINIC_SQ_CTRL_GET(*queue_info, QUEUE_INFO_MSS) < HINIC_MSS_MIN) {
+		*queue_info = HINIC_SQ_CTRL_CLEAR(*queue_info, QUEUE_INFO_MSS);
+		*queue_info |= HINIC_SQ_CTRL_SET(HINIC_MSS_MIN, QUEUE_INFO_MSS);
+	}
+
+	return 0;
+}
+
 netdev_tx_t hinic_xmit_frame(struct sk_buff *skb, struct net_device *netdev)
 {
 	struct hinic_dev *nic_dev = netdev_priv(netdev);
+	u16 prod_idx, q_id = skb->queue_mapping;
 	struct netdev_queue *netdev_txq;
 	int nr_sges, err = NETDEV_TX_OK;
 	struct hinic_sq_wqe *sq_wqe;
 	unsigned int wqe_size;
 	struct hinic_txq *txq;
 	struct hinic_qp *qp;
-	u16 prod_idx;
 
-	txq = &nic_dev->txqs[skb->queue_mapping];
+	txq = &nic_dev->txqs[q_id];
 	qp = container_of(txq->sq, struct hinic_qp, sq);
 
 	if (skb->len < MIN_SKB_LEN) {
@@ -236,15 +510,23 @@ netdev_tx_t hinic_xmit_frame(struct sk_buff *skb, struct net_device *netdev)
 process_sq_wqe:
 	hinic_sq_prepare_wqe(txq->sq, prod_idx, sq_wqe, txq->sges, nr_sges);
 
+	err = hinic_tx_offload(skb, &sq_wqe->task, &sq_wqe->ctrl.queue_info);
+	if (err)
+		goto offload_error;
+
 	hinic_sq_write_wqe(txq->sq, prod_idx, sq_wqe, skb, wqe_size);
 
 flush_skbs:
-	netdev_txq = netdev_get_tx_queue(netdev, skb->queue_mapping);
+	netdev_txq = netdev_get_tx_queue(netdev, q_id);
 	if ((!skb->xmit_more) || (netif_xmit_stopped(netdev_txq)))
 		hinic_sq_write_db(txq->sq, prod_idx, wqe_size, 0);
 
 	return err;
 
+offload_error:
+	hinic_sq_return_wqe(txq->sq, wqe_size);
+	tx_unmap_skb(nic_dev, skb, txq->sges);
+
 skb_error:
 	dev_kfree_skb_any(skb);
 
@@ -252,7 +534,8 @@ netdev_tx_t hinic_xmit_frame(struct sk_buff *skb, struct net_device *netdev)
 	u64_stats_update_begin(&txq->txq_stats.syncp);
 	txq->txq_stats.tx_dropped++;
 	u64_stats_update_end(&txq->txq_stats.syncp);
-	return err;
+
+	return NETDEV_TX_OK;
 }
 
 /**