net: hns3: refactor hns3_set_ringparam()

Use struct hns3_ring_param to replace variable new/old_xxx and
add hns3_is_ringparam_changed() to judge them if is changed to
improve code readability.

Signed-off-by: Hao Chen <chenhao288@hisilicon.com>
Signed-off-by: Guangbin Huang <huangguangbin2@huawei.com>
Signed-off-by: David S. Miller <davem@davemloft.net>

diff --git a/drivers/net/ethernet/hisilicon/hns3/hns3_ethtool.c b/drivers/net/ethernet/hisilicon/hns3/hns3_ethtool.c
index 8663ba5..e647751 100644 (file)
--- a/drivers/net/ethernet/hisilicon/hns3/hns3_ethtool.c
+++ b/drivers/net/ethernet/hisilicon/hns3/hns3_ethtool.c
@@ -1106,6 +1106,36 @@ static int hns3_check_ringparam(struct net_device *ndev,
        return 0;
 }
 
+static bool
+hns3_is_ringparam_changed(struct net_device *ndev,
+                         struct ethtool_ringparam *param,
+                         struct kernel_ethtool_ringparam *kernel_param,
+                         struct hns3_ring_param *old_ringparam,
+                         struct hns3_ring_param *new_ringparam)
+{
+       struct hns3_nic_priv *priv = netdev_priv(ndev);
+       struct hnae3_handle *h = priv->ae_handle;
+       u16 queue_num = h->kinfo.num_tqps;
+
+       new_ringparam->tx_desc_num = ALIGN(param->tx_pending,
+                                          HNS3_RING_BD_MULTIPLE);
+       new_ringparam->rx_desc_num = ALIGN(param->rx_pending,
+                                          HNS3_RING_BD_MULTIPLE);
+       old_ringparam->tx_desc_num = priv->ring[0].desc_num;
+       old_ringparam->rx_desc_num = priv->ring[queue_num].desc_num;
+       old_ringparam->rx_buf_len = priv->ring[queue_num].buf_size;
+       new_ringparam->rx_buf_len = kernel_param->rx_buf_len;
+
+       if (old_ringparam->tx_desc_num == new_ringparam->tx_desc_num &&
+           old_ringparam->rx_desc_num == new_ringparam->rx_desc_num &&
+           old_ringparam->rx_buf_len == new_ringparam->rx_buf_len) {
+               netdev_info(ndev, "ringparam not changed\n");
+               return false;
+       }
+
+       return true;
+}
+
 static int hns3_change_rx_buf_len(struct net_device *ndev, u32 rx_buf_len)
 {
        struct hns3_nic_priv *priv = netdev_priv(ndev);
@@ -1151,14 +1181,11 @@ static int hns3_set_ringparam(struct net_device *ndev,
                              struct kernel_ethtool_ringparam *kernel_param,
                              struct netlink_ext_ack *extack)
 {
+       struct hns3_ring_param old_ringparam, new_ringparam;
        struct hns3_nic_priv *priv = netdev_priv(ndev);
        struct hnae3_handle *h = priv->ae_handle;
        struct hns3_enet_ring *tmp_rings;
        bool if_running = netif_running(ndev);
-       u32 old_tx_desc_num, new_tx_desc_num;
-       u32 old_rx_desc_num, new_rx_desc_num;
-       u16 queue_num = h->kinfo.num_tqps;
-       u32 old_rx_buf_len;
        int ret, i;
 
        ret = hns3_check_ringparam(ndev, param, kernel_param);
@@ -1169,15 +1196,8 @@ static int hns3_set_ringparam(struct net_device *ndev,
        if (ret)
                return ret;
 
-       /* Hardware requires that its descriptors must be multiple of eight */
-       new_tx_desc_num = ALIGN(param->tx_pending, HNS3_RING_BD_MULTIPLE);
-       new_rx_desc_num = ALIGN(param->rx_pending, HNS3_RING_BD_MULTIPLE);
-       old_tx_desc_num = priv->ring[0].desc_num;
-       old_rx_desc_num = priv->ring[queue_num].desc_num;
-       old_rx_buf_len = priv->ring[queue_num].buf_size;
-       if (old_tx_desc_num == new_tx_desc_num &&
-           old_rx_desc_num == new_rx_desc_num &&
-           kernel_param->rx_buf_len == old_rx_buf_len)
+       if (!hns3_is_ringparam_changed(ndev, param, kernel_param,
+                                      &old_ringparam, &new_ringparam))
                return 0;
 
        tmp_rings = hns3_backup_ringparam(priv);
@@ -1188,24 +1208,25 @@ static int hns3_set_ringparam(struct net_device *ndev,
        }
 
        netdev_info(ndev,
-                   "Changing Tx/Rx ring depth from %u/%u to %u/%u, Changing rx buffer len from %d to %d\n",
-                   old_tx_desc_num, old_rx_desc_num,
-                   new_tx_desc_num, new_rx_desc_num,
-                   old_rx_buf_len, kernel_param->rx_buf_len);
+                   "Changing Tx/Rx ring depth from %u/%u to %u/%u, Changing rx buffer len from %u to %u\n",
+                   old_ringparam.tx_desc_num, old_ringparam.rx_desc_num,
+                   new_ringparam.tx_desc_num, new_ringparam.rx_desc_num,
+                   old_ringparam.rx_buf_len, new_ringparam.rx_buf_len);
 
        if (if_running)
                ndev->netdev_ops->ndo_stop(ndev);
 
-       hns3_change_all_ring_bd_num(priv, new_tx_desc_num, new_rx_desc_num);
-       hns3_change_rx_buf_len(ndev, kernel_param->rx_buf_len);
+       hns3_change_all_ring_bd_num(priv, new_ringparam.tx_desc_num,
+                                   new_ringparam.rx_desc_num);
+       hns3_change_rx_buf_len(ndev, new_ringparam.rx_buf_len);
        ret = hns3_init_all_ring(priv);
        if (ret) {
                netdev_err(ndev, "set ringparam fail, revert to old value(%d)\n",
                           ret);
 
-               hns3_change_rx_buf_len(ndev, old_rx_buf_len);
-               hns3_change_all_ring_bd_num(priv, old_tx_desc_num,
-                                           old_rx_desc_num);
+               hns3_change_rx_buf_len(ndev, old_ringparam.rx_buf_len);
+               hns3_change_all_ring_bd_num(priv, old_ringparam.tx_desc_num,
+                                           old_ringparam.rx_desc_num);
                for (i = 0; i < h->kinfo.num_tqps * 2; i++)
                        memcpy(&priv->ring[i], &tmp_rings[i],
                               sizeof(struct hns3_enet_ring));

diff --git a/drivers/net/ethernet/hisilicon/hns3/hns3_ethtool.h b/drivers/net/ethernet/hisilicon/hns3/hns3_ethtool.h
index 822d6fc..da207d1 100644 (file)
--- a/drivers/net/ethernet/hisilicon/hns3/hns3_ethtool.h
+++ b/drivers/net/ethernet/hisilicon/hns3/hns3_ethtool.h
@@ -28,4 +28,10 @@ struct hns3_ethtool_link_ext_state_mapping {
        u8 link_ext_substate;
 };
 
+struct hns3_ring_param {
+       u32 tx_desc_num;
+       u32 rx_desc_num;
+       u32 rx_buf_len;
+};
+
 #endif