diff options
| -rw-r--r-- | drivers/net/ethernet/google/gve/gve.h | 8 | ||||
| -rw-r--r-- | drivers/net/ethernet/google/gve/gve_ethtool.c | 85 | ||||
| -rw-r--r-- | drivers/net/ethernet/google/gve/gve_main.c | 16 |
3 files changed, 95 insertions, 14 deletions
diff --git a/drivers/net/ethernet/google/gve/gve.h b/drivers/net/ethernet/google/gve/gve.h index 669cacdae4f4..e97633b68e25 100644 --- a/drivers/net/ethernet/google/gve/gve.h +++ b/drivers/net/ethernet/google/gve/gve.h @@ -1159,6 +1159,14 @@ int gve_set_hsplit_config(struct gve_priv *priv, u8 tcp_data_split); /* Reset */ void gve_schedule_reset(struct gve_priv *priv); int gve_reset(struct gve_priv *priv, bool attempt_teardown); +void gve_get_curr_alloc_cfgs(struct gve_priv *priv, + struct gve_qpls_alloc_cfg *qpls_alloc_cfg, + struct gve_tx_alloc_rings_cfg *tx_alloc_cfg, + struct gve_rx_alloc_rings_cfg *rx_alloc_cfg); +int gve_adjust_config(struct gve_priv *priv, + struct gve_qpls_alloc_cfg *qpls_alloc_cfg, + struct gve_tx_alloc_rings_cfg *tx_alloc_cfg, + struct gve_rx_alloc_rings_cfg *rx_alloc_cfg); int gve_adjust_queues(struct gve_priv *priv, struct gve_queue_config new_rx_config, struct gve_queue_config new_tx_config); diff --git a/drivers/net/ethernet/google/gve/gve_ethtool.c b/drivers/net/ethernet/google/gve/gve_ethtool.c index dbe05402d40b..815dead31673 100644 --- a/drivers/net/ethernet/google/gve/gve_ethtool.c +++ b/drivers/net/ethernet/google/gve/gve_ethtool.c @@ -490,8 +490,8 @@ static void gve_get_ringparam(struct net_device *netdev, { struct gve_priv *priv = netdev_priv(netdev); - cmd->rx_max_pending = priv->rx_desc_cnt; - cmd->tx_max_pending = priv->tx_desc_cnt; + cmd->rx_max_pending = priv->max_rx_desc_cnt; + cmd->tx_max_pending = priv->max_tx_desc_cnt; cmd->rx_pending = priv->rx_desc_cnt; cmd->tx_pending = priv->tx_desc_cnt; @@ -503,20 +503,93 @@ static void gve_get_ringparam(struct net_device *netdev, kernel_cmd->tcp_data_split = ETHTOOL_TCP_DATA_SPLIT_DISABLED; } +static int gve_adjust_ring_sizes(struct gve_priv *priv, + u16 new_tx_desc_cnt, + u16 new_rx_desc_cnt) +{ + struct gve_tx_alloc_rings_cfg tx_alloc_cfg = {0}; + struct gve_rx_alloc_rings_cfg rx_alloc_cfg = {0}; + struct gve_qpls_alloc_cfg qpls_alloc_cfg = {0}; + struct gve_qpl_config new_qpl_cfg; + int err; + + /* get current queue configuration */ + gve_get_curr_alloc_cfgs(priv, &qpls_alloc_cfg, + &tx_alloc_cfg, &rx_alloc_cfg); + + /* copy over the new ring_size from ethtool */ + tx_alloc_cfg.ring_size = new_tx_desc_cnt; + rx_alloc_cfg.ring_size = new_rx_desc_cnt; + + /* qpl_cfg is not read-only, it contains a map that gets updated as + * rings are allocated, which is why we cannot use the yet unreleased + * one in priv. + */ + qpls_alloc_cfg.qpl_cfg = &new_qpl_cfg; + tx_alloc_cfg.qpl_cfg = &new_qpl_cfg; + rx_alloc_cfg.qpl_cfg = &new_qpl_cfg; + + if (netif_running(priv->dev)) { + err = gve_adjust_config(priv, &qpls_alloc_cfg, + &tx_alloc_cfg, &rx_alloc_cfg); + if (err) + return err; + } + + /* Set new ring_size for the next up */ + priv->tx_desc_cnt = new_tx_desc_cnt; + priv->rx_desc_cnt = new_rx_desc_cnt; + + return 0; +} + +static int gve_validate_req_ring_size(struct gve_priv *priv, u16 new_tx_desc_cnt, + u16 new_rx_desc_cnt) +{ + /* check for valid range */ + if (new_tx_desc_cnt < priv->min_tx_desc_cnt || + new_tx_desc_cnt > priv->max_tx_desc_cnt || + new_rx_desc_cnt < priv->min_rx_desc_cnt || + new_rx_desc_cnt > priv->max_rx_desc_cnt) { + dev_err(&priv->pdev->dev, "Requested descriptor count out of range\n"); + return -EINVAL; + } + + if (!is_power_of_2(new_tx_desc_cnt) || !is_power_of_2(new_rx_desc_cnt)) { + dev_err(&priv->pdev->dev, "Requested descriptor count has to be a power of 2\n"); + return -EINVAL; + } + return 0; +} + static int gve_set_ringparam(struct net_device *netdev, struct ethtool_ringparam *cmd, struct kernel_ethtool_ringparam *kernel_cmd, struct netlink_ext_ack *extack) { struct gve_priv *priv = netdev_priv(netdev); + u16 new_tx_cnt, new_rx_cnt; + int err; + + err = gve_set_hsplit_config(priv, kernel_cmd->tcp_data_split); + if (err) + return err; - if (priv->tx_desc_cnt != cmd->tx_pending || - priv->rx_desc_cnt != cmd->rx_pending) { - dev_info(&priv->pdev->dev, "Modify ring size is not supported.\n"); + if (cmd->tx_pending == priv->tx_desc_cnt && cmd->rx_pending == priv->rx_desc_cnt) + return 0; + + if (!priv->modify_ring_size_enabled) { + dev_err(&priv->pdev->dev, "Modify ring size is not supported.\n"); return -EOPNOTSUPP; } - return gve_set_hsplit_config(priv, kernel_cmd->tcp_data_split); + new_tx_cnt = cmd->tx_pending; + new_rx_cnt = cmd->rx_pending; + + if (gve_validate_req_ring_size(priv, new_tx_cnt, new_rx_cnt)) + return -EINVAL; + + return gve_adjust_ring_sizes(priv, new_tx_cnt, new_rx_cnt); } static int gve_user_reset(struct net_device *netdev, u32 *flags) diff --git a/drivers/net/ethernet/google/gve/gve_main.c b/drivers/net/ethernet/google/gve/gve_main.c index 470447c0490f..a515e5af843c 100644 --- a/drivers/net/ethernet/google/gve/gve_main.c +++ b/drivers/net/ethernet/google/gve/gve_main.c @@ -1314,10 +1314,10 @@ static void gve_rx_get_curr_alloc_cfg(struct gve_priv *priv, cfg->rx = priv->rx; } -static void gve_get_curr_alloc_cfgs(struct gve_priv *priv, - struct gve_qpls_alloc_cfg *qpls_alloc_cfg, - struct gve_tx_alloc_rings_cfg *tx_alloc_cfg, - struct gve_rx_alloc_rings_cfg *rx_alloc_cfg) +void gve_get_curr_alloc_cfgs(struct gve_priv *priv, + struct gve_qpls_alloc_cfg *qpls_alloc_cfg, + struct gve_tx_alloc_rings_cfg *tx_alloc_cfg, + struct gve_rx_alloc_rings_cfg *rx_alloc_cfg) { gve_qpls_get_curr_alloc_cfg(priv, qpls_alloc_cfg); gve_tx_get_curr_alloc_cfg(priv, tx_alloc_cfg); @@ -1867,10 +1867,10 @@ static int gve_xdp(struct net_device *dev, struct netdev_bpf *xdp) } } -static int gve_adjust_config(struct gve_priv *priv, - struct gve_qpls_alloc_cfg *qpls_alloc_cfg, - struct gve_tx_alloc_rings_cfg *tx_alloc_cfg, - struct gve_rx_alloc_rings_cfg *rx_alloc_cfg) +int gve_adjust_config(struct gve_priv *priv, + struct gve_qpls_alloc_cfg *qpls_alloc_cfg, + struct gve_tx_alloc_rings_cfg *tx_alloc_cfg, + struct gve_rx_alloc_rings_cfg *rx_alloc_cfg) { int err; |