static int hns3_set_ringparam(struct net_device *ndev,
struct ethtool_ringparam *param)
{
struct hns3_nic_priv *priv = netdev_priv(ndev);
struct hnae3_handle *h = priv->ae_handle;
bool if_running = netif_running(ndev);
u32 old_tx_desc_num, new_tx_desc_num;
u32 old_rx_desc_num, new_rx_desc_num;
int queue_num = h->kinfo.num_tqps;
int ret;
if (hns3_nic_resetting(ndev))
return -EBUSY;
if (param->rx_mini_pending || param->rx_jumbo_pending)
return -EINVAL;
if (param->tx_pending > HNS3_RING_MAX_PENDING ||
param->tx_pending < HNS3_RING_MIN_PENDING ||
param->rx_pending > HNS3_RING_MAX_PENDING ||
param->rx_pending < HNS3_RING_MIN_PENDING) {
netdev_err(ndev, "Queue depth out of range [%d-%d]\n",
HNS3_RING_MIN_PENDING, HNS3_RING_MAX_PENDING);
return -EINVAL;
}
/* 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_data[0].ring->desc_num;
old_rx_desc_num = priv->ring_data[queue_num].ring->desc_num;
if (old_tx_desc_num == new_tx_desc_num &&
old_rx_desc_num == new_rx_desc_num)
return 0;
netdev_info(ndev,
"Changing Tx/Rx ring depth from %d/%d to %d/%d\n",
old_tx_desc_num, old_rx_desc_num,
new_tx_desc_num, new_rx_desc_num);
if (if_running)
ndev->netdev_ops->ndo_stop(ndev);
ret = hns3_uninit_all_ring(priv);
if (ret)
return ret;
ret = hns3_change_all_ring_bd_num(priv, new_tx_desc_num,
new_rx_desc_num);
if (ret) {
ret = hns3_change_all_ring_bd_num(priv, old_tx_desc_num,
old_rx_desc_num);
if (ret) {
netdev_err(ndev,
"Revert to old bd num fail, ret=%d.\n", ret);
return ret;
}
}
if (if_running)
ret = ndev->netdev_ops->ndo_open(ndev);
return ret;
}
static int hns3_set_ringparam(struct net_device *ndev,
struct ethtool_ringparam *param)
{
struct hns3_nic_priv *priv = netdev_priv(ndev);
struct hnae3_handle *h = priv->ae_handle;
bool if_running = netif_running(ndev);
u32 old_desc_num, new_desc_num;
int ret;
if (param->rx_mini_pending || param->rx_jumbo_pending)
return -EINVAL;
if (param->tx_pending != param->rx_pending) {
netdev_err(ndev,
"Descriptors of tx and rx must be equal");
return -EINVAL;
}
if (param->tx_pending > HNS3_RING_MAX_PENDING ||
param->tx_pending < HNS3_RING_MIN_PENDING) {
netdev_err(ndev,
"Descriptors requested (Tx/Rx: %d) out of range [%d-%d]\n",
param->tx_pending, HNS3_RING_MIN_PENDING,
HNS3_RING_MAX_PENDING);
return -EINVAL;
}
new_desc_num = param->tx_pending;
/* Hardware requires that its descriptors must be multiple of eight */
new_desc_num = ALIGN(new_desc_num, HNS3_RING_BD_MULTIPLE);
old_desc_num = h->kinfo.num_desc;
if (old_desc_num == new_desc_num)
return 0;
netdev_info(ndev,
"Changing descriptor count from %d to %d.\n",
old_desc_num, new_desc_num);
if (if_running)
dev_close(ndev);
ret = hns3_uninit_all_ring(priv);
if (ret)
return ret;
ret = hns3_change_all_ring_bd_num(priv, new_desc_num);
if (ret) {
ret = hns3_change_all_ring_bd_num(priv, old_desc_num);
if (ret) {
netdev_err(ndev,
"Revert to old bd num fail, ret=%d.\n", ret);
return ret;
}
}
if (if_running)
ret = dev_open(ndev);
return ret;
}
