hinic: add set_ringparam ethtool_ops support

support to change TX/RX queue depth with ethtool -G
Signed-off-by: Luo bin <luobin9@huawei.com>
Signed-off-by: David S. Miller <davem@davemloft.net>

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

@@ -69,6 +69,8 @@ struct hinic_dev {
 
 	struct hinic_txq                *txqs;
 	struct hinic_rxq                *rxqs;
+	u16				sq_depth;
+	u16				rq_depth;
 
 	struct hinic_txq_stats          tx_stats;
 	struct hinic_rxq_stats          rx_stats;

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

@@ -538,12 +538,81 @@ static void hinic_get_drvinfo(struct net_device *netdev,
 static void hinic_get_ringparam(struct net_device *netdev,
 				struct ethtool_ringparam *ring)
 {
-	ring->rx_max_pending = HINIC_RQ_DEPTH;
-	ring->tx_max_pending = HINIC_SQ_DEPTH;
-	ring->rx_pending = HINIC_RQ_DEPTH;
-	ring->tx_pending = HINIC_SQ_DEPTH;
+	struct hinic_dev *nic_dev = netdev_priv(netdev);
+
+	ring->rx_max_pending = HINIC_MAX_QUEUE_DEPTH;
+	ring->tx_max_pending = HINIC_MAX_QUEUE_DEPTH;
+	ring->rx_pending = nic_dev->rq_depth;
+	ring->tx_pending = nic_dev->sq_depth;
 }
 
+static int check_ringparam_valid(struct hinic_dev *nic_dev,
+				 struct ethtool_ringparam *ring)
+{
+	if (ring->rx_jumbo_pending || ring->rx_mini_pending) {
+		netif_err(nic_dev, drv, nic_dev->netdev,
+			  "Unsupported rx_jumbo_pending/rx_mini_pending\n");
+		return -EINVAL;
+	}
+
+	if (ring->tx_pending > HINIC_MAX_QUEUE_DEPTH ||
+	    ring->tx_pending < HINIC_MIN_QUEUE_DEPTH ||
+	    ring->rx_pending > HINIC_MAX_QUEUE_DEPTH ||
+	    ring->rx_pending < HINIC_MIN_QUEUE_DEPTH) {
+		netif_err(nic_dev, drv, nic_dev->netdev,
+			  "Queue depth out of range [%d-%d]\n",
+			  HINIC_MIN_QUEUE_DEPTH, HINIC_MAX_QUEUE_DEPTH);
+		return -EINVAL;
+	}
+
+	return 0;
+}
+
+static int hinic_set_ringparam(struct net_device *netdev,
+			       struct ethtool_ringparam *ring)
+{
+	struct hinic_dev *nic_dev = netdev_priv(netdev);
+	u16 new_sq_depth, new_rq_depth;
+	int err;
+
+	err = check_ringparam_valid(nic_dev, ring);
+	if (err)
+		return err;
+
+	new_sq_depth = (u16)(1U << (u16)ilog2(ring->tx_pending));
+	new_rq_depth = (u16)(1U << (u16)ilog2(ring->rx_pending));
+
+	if (new_sq_depth == nic_dev->sq_depth &&
+	    new_rq_depth == nic_dev->rq_depth)
+		return 0;
+
+	netif_info(nic_dev, drv, netdev,
+		   "Change Tx/Rx ring depth from %d/%d to %d/%d\n",
+		   nic_dev->sq_depth, nic_dev->rq_depth,
+		   new_sq_depth, new_rq_depth);
+
+	nic_dev->sq_depth = new_sq_depth;
+	nic_dev->rq_depth = new_rq_depth;
+
+	if (netif_running(netdev)) {
+		netif_info(nic_dev, drv, netdev, "Restarting netdev\n");
+		err = hinic_close(netdev);
+		if (err) {
+			netif_err(nic_dev, drv, netdev,
+				  "Failed to close netdev\n");
+			return -EFAULT;
+		}
+
+		err = hinic_open(netdev);
+		if (err) {
+			netif_err(nic_dev, drv, netdev,
+				  "Failed to open netdev\n");
+			return -EFAULT;
+		}
+	}
+
+	return 0;
+}
 static void hinic_get_channels(struct net_device *netdev,
 			       struct ethtool_channels *channels)
 {
@@ -1148,6 +1217,7 @@ static const struct ethtool_ops hinic_ethtool_ops = {
 	.get_drvinfo = hinic_get_drvinfo,
 	.get_link = ethtool_op_get_link,
 	.get_ringparam = hinic_get_ringparam,
+	.set_ringparam = hinic_set_ringparam,
 	.get_channels = hinic_get_channels,
 	.get_rxnfc = hinic_get_rxnfc,
 	.set_rxnfc = hinic_set_rxnfc,

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

@@ -269,8 +269,8 @@ static int init_fw_ctxt(struct hinic_hwdev *hwdev)
  *
  * Return 0 - Success, negative - Failure
  **/
-static int set_hw_ioctxt(struct hinic_hwdev *hwdev, unsigned int rq_depth,
-			 unsigned int sq_depth)
+static int set_hw_ioctxt(struct hinic_hwdev *hwdev, unsigned int sq_depth,
+			 unsigned int rq_depth)
 {
 	struct hinic_hwif *hwif = hwdev->hwif;
 	struct hinic_cmd_hw_ioctxt hw_ioctxt;
@@ -435,7 +435,7 @@ static int get_base_qpn(struct hinic_hwdev *hwdev, u16 *base_qpn)
  *
  * Return 0 - Success, negative - Failure
  **/
-int hinic_hwdev_ifup(struct hinic_hwdev *hwdev)
+int hinic_hwdev_ifup(struct hinic_hwdev *hwdev, u16 sq_depth, u16 rq_depth)
 {
 	struct hinic_func_to_io *func_to_io = &hwdev->func_to_io;
 	struct hinic_cap *nic_cap = &hwdev->nic_cap;
@@ -458,6 +458,9 @@ int hinic_hwdev_ifup(struct hinic_hwdev *hwdev)
 
 	ceq_msix_entries = &hwdev->msix_entries[num_aeqs];
 	func_to_io->hwdev = hwdev;
+	func_to_io->sq_depth = sq_depth;
+	func_to_io->rq_depth = rq_depth;
+
 	err = hinic_io_init(func_to_io, hwif, nic_cap->max_qps, num_ceqs,
 			    ceq_msix_entries);
 	if (err) {
@@ -482,7 +485,7 @@ int hinic_hwdev_ifup(struct hinic_hwdev *hwdev)
 		hinic_db_state_set(hwif, HINIC_DB_ENABLE);
 	}
 
-	err = set_hw_ioctxt(hwdev, HINIC_SQ_DEPTH, HINIC_RQ_DEPTH);
+	err = set_hw_ioctxt(hwdev, sq_depth, rq_depth);
 	if (err) {
 		dev_err(&pdev->dev, "Failed to set HW IO ctxt\n");
 		goto err_hw_ioctxt;

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

@@ -347,7 +347,7 @@ int hinic_hilink_msg_cmd(struct hinic_hwdev *hwdev, enum hinic_hilink_cmd cmd,
 			 void *buf_in, u16 in_size, void *buf_out,
 			 u16 *out_size);
 
-int hinic_hwdev_ifup(struct hinic_hwdev *hwdev);
+int hinic_hwdev_ifup(struct hinic_hwdev *hwdev, u16 sq_depth, u16 rq_depth);
 
 void hinic_hwdev_ifdown(struct hinic_hwdev *hwdev);
 

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

@@ -282,7 +282,7 @@ static int init_qp(struct hinic_func_to_io *func_to_io,
 
 	err = hinic_wq_allocate(&func_to_io->wqs, &func_to_io->sq_wq[q_id],
 				HINIC_SQ_WQEBB_SIZE, HINIC_SQ_PAGE_SIZE,
-				HINIC_SQ_DEPTH, HINIC_SQ_WQE_MAX_SIZE);
+				func_to_io->sq_depth, HINIC_SQ_WQE_MAX_SIZE);
 	if (err) {
 		dev_err(&pdev->dev, "Failed to allocate WQ for SQ\n");
 		return err;
@@ -290,7 +290,7 @@ static int init_qp(struct hinic_func_to_io *func_to_io,
 
 	err = hinic_wq_allocate(&func_to_io->wqs, &func_to_io->rq_wq[q_id],
 				HINIC_RQ_WQEBB_SIZE, HINIC_RQ_PAGE_SIZE,
-				HINIC_RQ_DEPTH, HINIC_RQ_WQE_SIZE);
+				func_to_io->rq_depth, HINIC_RQ_WQE_SIZE);
 	if (err) {
 		dev_err(&pdev->dev, "Failed to allocate WQ for RQ\n");
 		goto err_rq_alloc;

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

@@ -60,6 +60,9 @@ struct hinic_func_to_io {
 	struct hinic_qp         *qps;
 	u16                     max_qps;
 
+	u16			sq_depth;
+	u16			rq_depth;
+
 	void __iomem            **sq_db;
 	void __iomem            *db_base;
 

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

@@ -643,6 +643,7 @@ void hinic_sq_write_db(struct hinic_sq *sq, u16 prod_idx, unsigned int wqe_size,
 
 	/* increment prod_idx to the next */
 	prod_idx += ALIGN(wqe_size, wq->wqebb_size) / wq->wqebb_size;
+	prod_idx = SQ_MASKED_IDX(sq, prod_idx);
 
 	wmb();  /* Write all before the doorbell */
 

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

@@ -44,6 +44,9 @@
 #define HINIC_SQ_DEPTH                          SZ_4K
 #define HINIC_RQ_DEPTH                          SZ_4K
 
+#define HINIC_MAX_QUEUE_DEPTH			SZ_4K
+#define HINIC_MIN_QUEUE_DEPTH			128
+
 /* In any change to HINIC_RX_BUF_SZ, HINIC_RX_BUF_SZ_IDX must be changed */
 #define HINIC_RX_BUF_SZ                         2048
 #define HINIC_RX_BUF_SZ_IDX			HINIC_RX_BUF_SZ_2048_IDX

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

@@ -372,14 +372,15 @@ static void hinic_enable_rss(struct hinic_dev *nic_dev)
 		netif_err(nic_dev, drv, netdev, "Failed to init rss\n");
 }
 
-static int hinic_open(struct net_device *netdev)
+int hinic_open(struct net_device *netdev)
 {
 	struct hinic_dev *nic_dev = netdev_priv(netdev);
 	enum hinic_port_link_state link_state;
 	int err, ret;
 
 	if (!(nic_dev->flags & HINIC_INTF_UP)) {
-		err = hinic_hwdev_ifup(nic_dev->hwdev);
+		err = hinic_hwdev_ifup(nic_dev->hwdev, nic_dev->sq_depth,
+				       nic_dev->rq_depth);
 		if (err) {
 			netif_err(nic_dev, drv, netdev,
 				  "Failed - HW interface up\n");
@@ -483,7 +484,7 @@ static int hinic_open(struct net_device *netdev)
 	return err;
 }
 
-static int hinic_close(struct net_device *netdev)
+int hinic_close(struct net_device *netdev)
 {
 	struct hinic_dev *nic_dev = netdev_priv(netdev);
 	unsigned int flags;
@@ -1038,6 +1039,8 @@ static int nic_dev_init(struct pci_dev *pdev)
 	nic_dev->rxqs = NULL;
 	nic_dev->tx_weight = tx_weight;
 	nic_dev->rx_weight = rx_weight;
+	nic_dev->sq_depth = HINIC_SQ_DEPTH;
+	nic_dev->rq_depth = HINIC_RQ_DEPTH;
 	nic_dev->sriov_info.hwdev = hwdev;
 	nic_dev->sriov_info.pdev = pdev;
 

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

@@ -473,7 +473,7 @@ int hinic_set_max_qnum(struct hinic_dev *nic_dev, u8 num_rqs)
 
 	rq_num.func_id = HINIC_HWIF_FUNC_IDX(hwif);
 	rq_num.num_rqs = num_rqs;
-	rq_num.rq_depth = ilog2(HINIC_SQ_DEPTH);
+	rq_num.rq_depth = ilog2(nic_dev->rq_depth);
 
 	err = hinic_port_msg_cmd(hwdev, HINIC_PORT_CMD_SET_RQ_IQ_MAP,
 				 &rq_num, sizeof(rq_num),

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

@@ -736,4 +736,8 @@ int hinic_get_hw_pause_info(struct hinic_hwdev *hwdev,
 int hinic_set_hw_pause_info(struct hinic_hwdev *hwdev,
 			    struct hinic_pause_config *pause_info);
 
+int hinic_open(struct net_device *netdev);
+
+int hinic_close(struct net_device *netdev);
+
 #endif