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net: hns3: add support for set_ringparam

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This patch supports the ethtool's set_ringparam().

Signed-off-by: Lipeng <lipeng321@huawei.com>
Signed-off-by: David S. Miller <davem@davemloft.net>
This commit is contained in:
Lipeng 2017-10-10 16:42:04 +08:00 committed by David S. Miller
parent ee83f77645
commit 5668abda09
3 changed files with 81 additions and 2 deletions
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4
drivers/net/ethernet/hisilicon/hns3/hns3pf/hns3_enet.c
View File

@ -2637,7 +2637,7 @@ static void hns3_init_ring_hw(struct hns3_enet_ring *ring)
}
}
static int hns3_init_all_ring(struct hns3_nic_priv *priv)
int hns3_init_all_ring(struct hns3_nic_priv *priv)
{
struct hnae3_handle *h = priv->ae_handle;
int ring_num = h->kinfo.num_tqps * 2;
@ -2666,7 +2666,7 @@ static int hns3_init_all_ring(struct hns3_nic_priv *priv)
return -ENOMEM;
}
static int hns3_uninit_all_ring(struct hns3_nic_priv *priv)
int hns3_uninit_all_ring(struct hns3_nic_priv *priv)
{
struct hnae3_handle *h = priv->ae_handle;
int i;

4
drivers/net/ethernet/hisilicon/hns3/hns3pf/hns3_enet.h
View File

@ -76,6 +76,8 @@ enum hns3_nic_state {
#define HNS3_RING_NAME_LEN 16
#define HNS3_BUFFER_SIZE_2048 2048
#define HNS3_RING_MAX_PENDING 32768
#define HNS3_RING_MIN_PENDING 8
#define HNS3_RING_BD_MULTIPLE 8
#define HNS3_MAX_MTU 9728
#define HNS3_BD_SIZE_512_TYPE 0
@ -593,6 +595,8 @@ static inline void hns3_write_reg(void __iomem *base, u32 reg, u32 value)
void hns3_ethtool_set_ops(struct net_device *netdev);
int hns3_clean_tx_ring(struct hns3_enet_ring *ring, int budget);
int hns3_init_all_ring(struct hns3_nic_priv *priv);
int hns3_uninit_all_ring(struct hns3_nic_priv *priv);
#ifdef CONFIG_HNS3_DCB
void hns3_dcbnl_setup(struct hnae3_handle *handle);

75
drivers/net/ethernet/hisilicon/hns3/hns3pf/hns3_ethtool.c
View File

@ -459,10 +459,85 @@ static int hns3_get_rxnfc(struct net_device *netdev,
return 0;
}
int hns3_change_all_ring_bd_num(struct hns3_nic_priv *priv, u32 new_desc_num)
{
struct hnae3_handle *h = priv->ae_handle;
int i;
h->kinfo.num_desc = new_desc_num;
for (i = 0; i < h->kinfo.num_tqps * 2; i++)
priv->ring_data[i].ring->desc_num = new_desc_num;
return hns3_init_all_ring(priv);
}
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;
}
static const struct ethtool_ops hns3_ethtool_ops = {
.get_drvinfo = hns3_get_drvinfo,
.get_link = hns3_get_link,
.get_ringparam = hns3_get_ringparam,
.set_ringparam = hns3_set_ringparam,
.get_pauseparam = hns3_get_pauseparam,
.get_strings = hns3_get_strings,
.get_ethtool_stats = hns3_get_stats,