@@ -9,6 +9,7 @@
 #include <linux/errno.h>
 #include <linux/etherdevice.h>
 #include <linux/netdevice.h>
+#include <linux/netlink.h>
 #include <linux/ethtool.h>
 
 #include "hinic3_lld.h"

@@ -409,6 +410,103 @@ hinic3_get_link_ksettings(struct net_device *netdev,
 	return 0;
 }
 
+static void hinic3_get_ringparam(struct net_device *netdev,
+				 struct ethtool_ringparam *ring,
+				 struct kernel_ethtool_ringparam *kernel_ring,
+				 struct netlink_ext_ack *extack)
+{
+	struct hinic3_nic_dev *nic_dev = netdev_priv(netdev);
+
+	ring->rx_max_pending = HINIC3_MAX_RX_QUEUE_DEPTH;
+	ring->tx_max_pending = HINIC3_MAX_TX_QUEUE_DEPTH;
+	ring->rx_pending = nic_dev->q_params.rq_depth;
+	ring->rx_pending = nic_dev->q_params.sq_depth;
+}
+
+static void hinic3_update_qp_depth(struct net_device *netdev,
+				   u32 sq_depth, u32 rq_depth)
+{
+	struct hinic3_nic_dev *nic_dev = netdev_priv(netdev);
+	u16 i;
+
+	nic_dev->q_params.sq_depth = sq_depth;
+	nic_dev->q_params.rq_depth = rq_depth;
+	for (i = 0; i < nic_dev->max_qps; i++) {
+		nic_dev->txqs[i].q_depth = sq_depth;
+		nic_dev->txqs[i].q_mask = sq_depth - 1;
+		nic_dev->rxqs[i].q_depth = rq_depth;
+		nic_dev->rxqs[i].q_mask = rq_depth - 1;
+	}
+}
+
+static int hinic3_check_ringparam_valid(struct net_device *netdev,
+					const struct ethtool_ringparam *ring,
+					struct netlink_ext_ack *extack)
+{
+	if (ring->tx_pending < HINIC3_MIN_QUEUE_DEPTH ||
+	    ring->rx_pending < HINIC3_MIN_QUEUE_DEPTH) {
+		NL_SET_ERR_MSG_FMT_MOD(extack,
+				       "Queue depth out of range tx[%d-%d] rx[%d-%d]",
+				       HINIC3_MIN_QUEUE_DEPTH,
+				       HINIC3_MAX_TX_QUEUE_DEPTH,
+				       HINIC3_MIN_QUEUE_DEPTH,
+				       HINIC3_MAX_RX_QUEUE_DEPTH);
+
+		return -EINVAL;
+	}
+
+	return 0;
+}
+
+static int hinic3_set_ringparam(struct net_device *netdev,
+				struct ethtool_ringparam *ring,
+				struct kernel_ethtool_ringparam *kernel_ring,
+				struct netlink_ext_ack *extack)
+{
+	struct hinic3_nic_dev *nic_dev = netdev_priv(netdev);
+	struct hinic3_dyna_txrxq_params q_params = {};
+	u32 new_sq_depth, new_rq_depth;
+	int err;
+
+	err = hinic3_check_ringparam_valid(netdev, ring, extack);
+	if (err)
+		return err;
+
+	new_sq_depth = 1U << ilog2(ring->tx_pending);
+	new_rq_depth = 1U << ilog2(ring->rx_pending);
+	if (new_sq_depth == nic_dev->q_params.sq_depth &&
+	    new_rq_depth == nic_dev->q_params.rq_depth)
+		return 0;
+
+	if (new_sq_depth != ring->tx_pending ||
+	    new_rq_depth != ring->rx_pending)
+		NL_SET_ERR_MSG_FMT_MOD(extack,
+				       "Requested Tx/Rx ring depth %u/%u trimmed to %u/%u",
+				       ring->tx_pending, ring->rx_pending,
+				       new_sq_depth, new_rq_depth);
+
+	netdev_info(netdev, "Change Tx/Rx ring depth from %u/%u to %u/%u\n",
+		    nic_dev->q_params.sq_depth, nic_dev->q_params.rq_depth,
+		    new_sq_depth, new_rq_depth);
+
+	if (!netif_running(netdev)) {
+		hinic3_update_qp_depth(netdev, new_sq_depth, new_rq_depth);
+	} else {
+		q_params = nic_dev->q_params;
+		q_params.sq_depth = new_sq_depth;
+		q_params.rq_depth = new_rq_depth;
+
+		err = hinic3_change_channel_settings(netdev, &q_params);
+		if (err) {
+			NL_SET_ERR_MSG_MOD(extack,
+					   "Failed to change channel settings");
+			return err;
+		}
+	}
+
+	return 0;
+}
+
 static const struct ethtool_ops hinic3_ethtool_ops = {
 	.supported_coalesce_params      = ETHTOOL_COALESCE_USECS |
 					  ETHTOOL_COALESCE_PKT_RATE_RX_USECS,

@@ -417,6 +515,8 @@ static const struct ethtool_ops hinic3_ethtool_ops = {
 	.get_msglevel                   = hinic3_get_msglevel,
 	.set_msglevel                   = hinic3_set_msglevel,
 	.get_link                       = ethtool_op_get_link,
+	.get_ringparam                  = hinic3_get_ringparam,
+	.set_ringparam                  = hinic3_set_ringparam,
 };
 
 void hinic3_set_ethtool_ops(struct net_device *netdev)

@@ -137,7 +137,8 @@ static int hinic3_set_interrupt_moder(struct net_device *netdev, u16 q_id,
 	struct hinic3_interrupt_info info = {};
 	int err;
 
-	if (q_id >= nic_dev->q_params.num_qps)
+	if (q_id >= nic_dev->q_params.num_qps ||
+	    !mutex_trylock(&nic_dev->change_res_mutex))
 		return 0;
 
 	info.interrupt_coalesc_set = 1;

@@ -156,6 +157,8 @@ static int hinic3_set_interrupt_moder(struct net_device *netdev, u16 q_id,
 		nic_dev->rxqs[q_id].last_pending_limit = pending_limit;
 	}
 
+	mutex_unlock(&nic_dev->change_res_mutex);
+
 	return err;
 }
 

@@ -179,6 +179,7 @@ static int hinic3_sw_init(struct net_device *netdev)
 	int err;
 
 	mutex_init(&nic_dev->port_state_mutex);
+	mutex_init(&nic_dev->change_res_mutex);
 
 	nic_dev->q_params.sq_depth = HINIC3_SQ_DEPTH;
 	nic_dev->q_params.rq_depth = HINIC3_RQ_DEPTH;

@@ -315,6 +316,9 @@ static void hinic3_link_status_change(struct net_device *netdev,
 {
 	struct hinic3_nic_dev *nic_dev = netdev_priv(netdev);
 
+	if (!mutex_trylock(&nic_dev->change_res_mutex))
+		return;
+
 	if (link_status_up) {
 		if (netif_carrier_ok(netdev))
 			return;

@@ -330,6 +334,8 @@ static void hinic3_link_status_change(struct net_device *netdev,
 		netif_carrier_off(netdev);
 		netdev_dbg(netdev, "Link is down\n");
 	}
+
+	mutex_unlock(&nic_dev->change_res_mutex);
 }
 
 static void hinic3_port_module_event_handler(struct net_device *netdev,

@@ -288,7 +288,8 @@ static void hinic3_free_channel_resources(struct net_device *netdev,
 	hinic3_free_qps(nic_dev, qp_params);
 }
 
-static int hinic3_open_channel(struct net_device *netdev)
+static int hinic3_prepare_channel(struct net_device *netdev,
+				  struct hinic3_dyna_txrxq_params *qp_params)
 {
 	struct hinic3_nic_dev *nic_dev = netdev_priv(netdev);
 	int err;

@@ -299,16 +300,28 @@ static int hinic3_open_channel(struct net_device *netdev)
 		return err;
 	}
 
-	err = hinic3_configure_txrxqs(netdev, &nic_dev->q_params);
+	err = hinic3_configure_txrxqs(netdev, qp_params);
 	if (err) {
 		netdev_err(netdev, "Failed to configure txrxqs\n");
 		goto err_free_qp_ctxts;
 	}
 
+	return 0;
+
+err_free_qp_ctxts:
+	hinic3_free_qp_ctxts(nic_dev);
+
+	return err;
+}
+
+static int hinic3_open_channel(struct net_device *netdev)
+{
+	int err;
+
 	err = hinic3_qps_irq_init(netdev);
 	if (err) {
 		netdev_err(netdev, "Failed to init txrxq irq\n");
-		goto err_free_qp_ctxts;
+		return err;
 	}
 
 	err = hinic3_configure(netdev);

@@ -321,8 +334,6 @@ static int hinic3_open_channel(struct net_device *netdev)
 
 err_uninit_qps_irq:
 	hinic3_qps_irq_uninit(netdev);
-err_free_qp_ctxts:
-	hinic3_free_qp_ctxts(nic_dev);
 
 	return err;
 }

@@ -428,6 +439,74 @@ static void hinic3_vport_down(struct net_device *netdev)
 	}
 }
 
+int
+hinic3_change_channel_settings(struct net_device *netdev,
+			       struct hinic3_dyna_txrxq_params *trxq_params)
+{
+	struct hinic3_nic_dev *nic_dev = netdev_priv(netdev);
+	struct hinic3_dyna_txrxq_params cur_trxq_params = {};
+	struct hinic3_dyna_qp_params new_qp_params = {};
+	struct hinic3_dyna_qp_params cur_qp_params = {};
+	int err;
+
+	cur_trxq_params = nic_dev->q_params;
+
+	hinic3_config_num_qps(netdev, trxq_params);
+
+	err = hinic3_alloc_channel_resources(netdev, &new_qp_params,
+					     trxq_params);
+	if (err) {
+		netdev_err(netdev, "Failed to alloc channel resources\n");
+		return err;
+	}
+
+	mutex_lock(&nic_dev->change_res_mutex);
+	hinic3_vport_down(netdev);
+	hinic3_close_channel(netdev);
+	hinic3_get_cur_qps(nic_dev, &cur_qp_params);
+
+	hinic3_init_qps(nic_dev, &new_qp_params);
+
+	err = hinic3_prepare_channel(netdev, trxq_params);
+	if (err)
+		goto err_uninit_qps;
+
+	if (nic_dev->num_qp_irq > trxq_params->num_qps)
+		hinic3_qp_irq_change(netdev, trxq_params->num_qps);
+
+	nic_dev->q_params = *trxq_params;
+
+	err = hinic3_open_channel(netdev);
+	if (err)
+		goto err_qp_irq_reset;
+
+	err = hinic3_vport_up(netdev);
+	if (err)
+		goto err_close_channel;
+
+	hinic3_free_channel_resources(netdev, &cur_qp_params, &cur_trxq_params);
+
+	mutex_unlock(&nic_dev->change_res_mutex);
+
+	return 0;
+
+err_close_channel:
+	hinic3_close_channel(netdev);
+err_qp_irq_reset:
+	nic_dev->q_params = cur_trxq_params;
+
+	if (trxq_params->num_qps > cur_trxq_params.num_qps)
+		hinic3_qp_irq_change(netdev, cur_trxq_params.num_qps);
+	hinic3_free_qp_ctxts(nic_dev);
+err_uninit_qps:
+	hinic3_get_cur_qps(nic_dev, &new_qp_params);
+	hinic3_free_channel_resources(netdev, &new_qp_params, trxq_params);
+	hinic3_free_channel_resources(netdev, &cur_qp_params, &cur_trxq_params);
+	mutex_unlock(&nic_dev->change_res_mutex);
+
+	return err;
+}
+
 static int hinic3_open(struct net_device *netdev)
 {
 	struct hinic3_nic_dev *nic_dev = netdev_priv(netdev);

@@ -458,6 +537,10 @@ static int hinic3_open(struct net_device *netdev)
 
 	hinic3_init_qps(nic_dev, &qp_params);
 
+	err = hinic3_prepare_channel(netdev, &nic_dev->q_params);
+	if (err)
+		goto err_uninit_qps;
+
 	err = hinic3_open_channel(netdev);
 	if (err)
 		goto err_uninit_qps;

@@ -473,7 +556,7 @@ static int hinic3_open(struct net_device *netdev)
 err_close_channel:
 	hinic3_close_channel(netdev);
 err_uninit_qps:
-	hinic3_uninit_qps(nic_dev, &qp_params);
+	hinic3_get_cur_qps(nic_dev, &qp_params);
 	hinic3_free_channel_resources(netdev, &qp_params, &nic_dev->q_params);
 err_destroy_num_qps:
 	hinic3_destroy_num_qps(netdev);

@@ -493,10 +576,15 @@ static int hinic3_close(struct net_device *netdev)
 		return 0;
 	}
 
+	mutex_lock(&nic_dev->change_res_mutex);
 	hinic3_vport_down(netdev);
 	hinic3_close_channel(netdev);
-	hinic3_uninit_qps(nic_dev, &qp_params);
-	hinic3_free_channel_resources(netdev, &qp_params, &nic_dev->q_params);
+	hinic3_get_cur_qps(nic_dev, &qp_params);
+	hinic3_free_channel_resources(netdev, &qp_params,
+				      &nic_dev->q_params);
+	hinic3_free_nicio_res(nic_dev);
+	hinic3_destroy_num_qps(netdev);
+	mutex_unlock(&nic_dev->change_res_mutex);
 
 	return 0;
 }

@@ -10,6 +10,9 @@
 #include "hinic3_hw_cfg.h"
 #include "hinic3_hwdev.h"
 #include "hinic3_mgmt_interface.h"
+#include "hinic3_nic_io.h"
+#include "hinic3_tx.h"
+#include "hinic3_rx.h"
 
 #define HINIC3_VLAN_BITMAP_BYTE_SIZE(nic_dev)  (sizeof(*(nic_dev)->vlan_bitmap))
 #define HINIC3_VLAN_BITMAP_SIZE(nic_dev)  \

@@ -129,6 +132,8 @@ struct hinic3_nic_dev {
 	struct work_struct              rx_mode_work;
 	/* lock for enable/disable port */
 	struct mutex                    port_state_mutex;
+	/* mutex to serialize channel/resource changes */
+	struct mutex                    change_res_mutex;
 
 	struct list_head                uc_filter_list;
 	struct list_head                mc_filter_list;

@@ -143,6 +148,10 @@ struct hinic3_nic_dev {
 
 void hinic3_set_netdev_ops(struct net_device *netdev);
 int hinic3_set_hw_features(struct net_device *netdev);
+int
+hinic3_change_channel_settings(struct net_device *netdev,
+			       struct hinic3_dyna_txrxq_params *trxq_params);
+
 int hinic3_qps_irq_init(struct net_device *netdev);
 void hinic3_qps_irq_uninit(struct net_device *netdev);
 

@@ -484,8 +484,8 @@ void hinic3_init_qps(struct hinic3_nic_dev *nic_dev,
 	}
 }
 
-void hinic3_uninit_qps(struct hinic3_nic_dev *nic_dev,
-		       struct hinic3_dyna_qp_params *qp_params)
+void hinic3_get_cur_qps(struct hinic3_nic_dev *nic_dev,
+			struct hinic3_dyna_qp_params *qp_params)
 {
 	struct hinic3_nic_io *nic_io = nic_dev->nic_io;
 

@@ -14,6 +14,10 @@ struct hinic3_nic_dev;
 #define HINIC3_RQ_WQEBB_SHIFT      3
 #define HINIC3_SQ_WQEBB_SIZE       BIT(HINIC3_SQ_WQEBB_SHIFT)
 
+#define HINIC3_MAX_TX_QUEUE_DEPTH  65536
+#define HINIC3_MAX_RX_QUEUE_DEPTH  16384
+#define HINIC3_MIN_QUEUE_DEPTH     128
+
 /* ******************** RQ_CTRL ******************** */
 enum hinic3_rq_wqe_type {
 	HINIC3_NORMAL_RQ_WQE = 1,

@@ -136,8 +140,8 @@ void hinic3_free_qps(struct hinic3_nic_dev *nic_dev,
 		     struct hinic3_dyna_qp_params *qp_params);
 void hinic3_init_qps(struct hinic3_nic_dev *nic_dev,
 		     struct hinic3_dyna_qp_params *qp_params);
-void hinic3_uninit_qps(struct hinic3_nic_dev *nic_dev,
-		       struct hinic3_dyna_qp_params *qp_params);
+void hinic3_get_cur_qps(struct hinic3_nic_dev *nic_dev,
+			struct hinic3_dyna_qp_params *qp_params);
 
 int hinic3_init_qp_ctxts(struct hinic3_nic_dev *nic_dev);
 void hinic3_free_qp_ctxts(struct hinic3_nic_dev *nic_dev);

@@ -541,7 +541,7 @@ int hinic3_configure_rxqs(struct net_device *netdev, u16 num_rq,
 		rq_associate_cqes(rxq);
 
 		pkts = hinic3_rx_fill_buffers(rxq);
-		if (!pkts) {
+		if (pkts < rxq->q_depth - 1) {
 			netdev_err(netdev, "Failed to fill Rx buffer\n");
 			return -ENOMEM;
 		}