[PATCH net-next 4/5] net: hns3: add support to set/get rx buf len via ethtool for hns3 driver
From: Guangbin Huang <hidden>
Date: 2021-08-25 06:44:57
Subsystem:
hisilicon network subsystem 3 driver (hns3), hisilicon network subsystem driver, networking drivers, the rest · Maintainers:
Jian Shen, Jijie Shao, Andrew Lunn, "David S. Miller", Eric Dumazet, Jakub Kicinski, Paolo Abeni, Linus Torvalds
From: Hao Chen <redacted> Rx buf len is for rx BD buffer size, support setting it via ethtool -G parameter and getting it via ethtool -g parameter. Signed-off-by: Hao Chen <redacted> Signed-off-by: Guangbin Huang <redacted> --- drivers/net/ethernet/hisilicon/hns3/hns3_ethtool.c | 42 ++++++++++++++++++---- 1 file changed, 36 insertions(+), 6 deletions(-)
diff --git a/drivers/net/ethernet/hisilicon/hns3/hns3_ethtool.c b/drivers/net/ethernet/hisilicon/hns3/hns3_ethtool.c
index 5a21b9eb9820..c78b3a377197 100644
--- a/drivers/net/ethernet/hisilicon/hns3/hns3_ethtool.c
+++ b/drivers/net/ethernet/hisilicon/hns3/hns3_ethtool.c@@ -616,7 +616,7 @@ static void hns3_get_ringparam(struct net_device *netdev, { struct hns3_nic_priv *priv = netdev_priv(netdev); struct hnae3_handle *h = priv->ae_handle; - int queue_num = h->kinfo.num_tqps; + int rx_queue_index = h->kinfo.num_tqps; if (hns3_nic_resetting(netdev)) { netdev_err(netdev, "dev resetting!");
@@ -627,7 +627,8 @@ static void hns3_get_ringparam(struct net_device *netdev, param->rx_max_pending = HNS3_RING_MAX_PENDING; param->tx_pending = priv->ring[0].desc_num; - param->rx_pending = priv->ring[queue_num].desc_num; + param->rx_pending = priv->ring[rx_queue_index].desc_num; + param->rx_buf_len = priv->ring[rx_queue_index].buf_size; } static void hns3_get_pauseparam(struct net_device *netdev,
@@ -1031,12 +1032,20 @@ static struct hns3_enet_ring *hns3_backup_ringparam(struct hns3_nic_priv *priv) static int hns3_check_ringparam(struct net_device *ndev, struct ethtool_ringparam *param) { +#define RX_BUF_LEN_2K 2048 +#define RX_BUF_LEN_4K 4096 if (hns3_nic_resetting(ndev)) return -EBUSY; if (param->rx_mini_pending || param->rx_jumbo_pending) return -EINVAL; + if (param->rx_buf_len != RX_BUF_LEN_2K && + param->rx_buf_len != RX_BUF_LEN_4K) { + netdev_err(ndev, "Rx buf len only support 2048 and 4096\n"); + return -EINVAL; + } + if (param->tx_pending > HNS3_RING_MAX_PENDING || param->tx_pending < HNS3_RING_MIN_PENDING || param->rx_pending > HNS3_RING_MAX_PENDING ||
@@ -1049,6 +1058,22 @@ static int hns3_check_ringparam(struct net_device *ndev, return 0; } +static int hns3_change_rx_buf_len(struct net_device *ndev, u32 rx_buf_len) +{ + struct hns3_nic_priv *priv = netdev_priv(ndev); + struct hnae3_handle *h = priv->ae_handle; + int i; + + h->kinfo.rx_buf_len = rx_buf_len; + + for (i = 0; i < h->kinfo.num_tqps; i++) { + h->kinfo.tqp[i]->buf_size = rx_buf_len; + priv->ring[i + h->kinfo.num_tqps].buf_size = rx_buf_len; + } + + return 0; +} + static int hns3_set_ringparam(struct net_device *ndev, struct ethtool_ringparam *param) {
@@ -1059,6 +1084,7 @@ static int hns3_set_ringparam(struct net_device *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);
@@ -1070,8 +1096,10 @@ static int hns3_set_ringparam(struct net_device *ndev, 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) + old_rx_desc_num == new_rx_desc_num && + param->rx_buf_len == old_rx_buf_len) return 0; tmp_rings = hns3_backup_ringparam(priv);
@@ -1082,19 +1110,21 @@ static int hns3_set_ringparam(struct net_device *ndev, } netdev_info(ndev, - "Changing Tx/Rx ring depth from %u/%u to %u/%u\n", + "Changing Tx/Rx ring depth from %u/%u to %u/%u, Changing rx buffer len to %d\n", old_tx_desc_num, old_rx_desc_num, - new_tx_desc_num, new_rx_desc_num); + new_tx_desc_num, new_rx_desc_num, param->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, param->rx_buf_len); ret = hns3_init_all_ring(priv); if (ret) { - netdev_err(ndev, "Change bd num fail, revert to old value(%d)\n", + 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); for (i = 0; i < h->kinfo.num_tqps * 2; i++)
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2.8.1