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net/mlx4_en: Add support for hardware accelerated 802.1ad vlan 

To enable device support in accelerated 802.1ad vlan, the port
capability "packet has vlan enable" (phv_en) should be set.
Firmware won't work properly, in case phv_en is not set.

The user can enable "phv_en" port capability with the new ethtool
private flag phv-bit. The phv-bit private flag default value is OFF,
users who are interested in 802.1ad hardware acceleration should turn ON
the phv-bit private flag:
$ ethtool --set-priv-flags eth1 phv-bit on

Once the private flag is set, the device is ready for 802.1ad vlan
acceleration.

The user should also change the interface device features and turn on
"tx-vlan-stag-hw-insert" which is off by default:
$ ethtool -K eth1  tx-vlan-stag-hw-insert on

"phv-bit" private flag setting is available only for Physical
Functions(PF), the Virtual Function (VF) will be able to use the feature
by setting "tx-vlan-stag-hw-insert" ethtool device feature only if the
feature was enabled by the Hypervisor.

Signed-off-by: Hadar Hen Zion <hadarh@mellanox.com>
Signed-off-by: Amir Vadai <amirv@mellanox.com>
Signed-off-by: David S. Miller <davem@davemloft.net>
This commit is contained in:
Hadar Hen Zion 2015-07-27 14:46:34 +03:00 коммит произвёл David S. Miller
Родитель e802f8e4c5
Коммит e38af4faf0
7 изменённых файлов: 89 добавлений и 5 удалений
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16
drivers/net/ethernet/mellanox/mlx4/en_ethtool.c
Просмотреть файл

@ -102,6 +102,7 @@ mlx4_en_get_drvinfo(struct net_device *dev, struct ethtool_drvinfo *drvinfo)
static const char mlx4_en_priv_flags[][ETH_GSTRING_LEN] = {
"blueflame",
"phv-bit"
};
static const char main_strings[][ETH_GSTRING_LEN] = {
@ -1797,9 +1798,13 @@ static int mlx4_en_get_ts_info(struct net_device *dev,
static int mlx4_en_set_priv_flags(struct net_device *dev, u32 flags)
{
struct mlx4_en_priv *priv = netdev_priv(dev);
struct mlx4_en_dev *mdev = priv->mdev;
bool bf_enabled_new = !!(flags & MLX4_EN_PRIV_FLAGS_BLUEFLAME);
bool bf_enabled_old = !!(priv->pflags & MLX4_EN_PRIV_FLAGS_BLUEFLAME);
bool phv_enabled_new = !!(flags & MLX4_EN_PRIV_FLAGS_PHV);
bool phv_enabled_old = !!(priv->pflags & MLX4_EN_PRIV_FLAGS_PHV);
int i;
int ret = 0;
if (bf_enabled_new != bf_enabled_old) {
if (bf_enabled_new) {
@ -1825,6 +1830,17 @@ static int mlx4_en_set_priv_flags(struct net_device *dev, u32 flags)
bf_enabled_new ? "Enabled" : "Disabled");
}
if (phv_enabled_new != phv_enabled_old) {
ret = set_phv_bit(mdev->dev, priv->port, (int)phv_enabled_new);
if (ret)
return ret;
else if (phv_enabled_new)
priv->pflags |= MLX4_EN_PRIV_FLAGS_PHV;
else
priv->pflags &= ~MLX4_EN_PRIV_FLAGS_PHV;
en_info(priv, "PHV bit %s\n",
phv_enabled_new ? "Enabled" : "Disabled");
}
return 0;
}

46
drivers/net/ethernet/mellanox/mlx4/en_netdev.c
Просмотреть файл

@ -2184,6 +2184,25 @@ static int mlx4_en_ioctl(struct net_device *dev, struct ifreq *ifr, int cmd)
}
}
static netdev_features_t mlx4_en_fix_features(struct net_device *netdev,
netdev_features_t features)
{
struct mlx4_en_priv *en_priv = netdev_priv(netdev);
struct mlx4_en_dev *mdev = en_priv->mdev;
/* Since there is no support for separate RX C-TAG/S-TAG vlan accel
* enable/disable make sure S-TAG flag is always in same state as
* C-TAG.
*/
if (features & NETIF_F_HW_VLAN_CTAG_RX &&
!(mdev->dev->caps.flags2 & MLX4_DEV_CAP_FLAG2_SKIP_OUTER_VLAN))
features |= NETIF_F_HW_VLAN_STAG_RX;
else
features &= ~NETIF_F_HW_VLAN_STAG_RX;
return features;
}
static int mlx4_en_set_features(struct net_device *netdev,
netdev_features_t features)
{
@ -2218,6 +2237,10 @@ static int mlx4_en_set_features(struct net_device *netdev,
en_info(priv, "Turn %s TX vlan strip offload\n",
(features & NETIF_F_HW_VLAN_CTAG_TX) ? "ON" : "OFF");
if (DEV_FEATURE_CHANGED(netdev, features, NETIF_F_HW_VLAN_STAG_TX))
en_info(priv, "Turn %s TX S-VLAN strip offload\n",
(features & NETIF_F_HW_VLAN_STAG_TX) ? "ON" : "OFF");
if (DEV_FEATURE_CHANGED(netdev, features, NETIF_F_LOOPBACK)) {
en_info(priv, "Turn %s loopback\n",
(features & NETIF_F_LOOPBACK) ? "ON" : "OFF");
@ -2460,6 +2483,7 @@ static const struct net_device_ops mlx4_netdev_ops = {
.ndo_poll_controller = mlx4_en_netpoll,
#endif
.ndo_set_features = mlx4_en_set_features,
.ndo_fix_features = mlx4_en_fix_features,
.ndo_setup_tc = mlx4_en_setup_tc,
#ifdef CONFIG_RFS_ACCEL
.ndo_rx_flow_steer = mlx4_en_filter_rfs,
@ -2500,6 +2524,7 @@ static const struct net_device_ops mlx4_netdev_ops_master = {
.ndo_poll_controller = mlx4_en_netpoll,
#endif
.ndo_set_features = mlx4_en_set_features,
.ndo_fix_features = mlx4_en_fix_features,
.ndo_setup_tc = mlx4_en_setup_tc,
#ifdef CONFIG_RFS_ACCEL
.ndo_rx_flow_steer = mlx4_en_filter_rfs,
@ -2931,6 +2956,27 @@ int mlx4_en_init_netdev(struct mlx4_en_dev *mdev, int port,
dev->hw_features |= NETIF_F_LOOPBACK |
NETIF_F_HW_VLAN_CTAG_TX | NETIF_F_HW_VLAN_CTAG_RX;
if (!(mdev->dev->caps.flags2 & MLX4_DEV_CAP_FLAG2_SKIP_OUTER_VLAN)) {
dev->features |= NETIF_F_HW_VLAN_STAG_RX |
NETIF_F_HW_VLAN_STAG_FILTER;
dev->hw_features |= NETIF_F_HW_VLAN_STAG_RX;
}
if (mlx4_is_slave(mdev->dev)) {
int phv;
err = get_phv_bit(mdev->dev, port, &phv);
if (!err && phv) {
dev->hw_features |= NETIF_F_HW_VLAN_STAG_TX;
priv->pflags |= MLX4_EN_PRIV_FLAGS_PHV;
}
} else {
if (mdev->dev->caps.flags2 & MLX4_DEV_CAP_FLAG2_PHV_EN &&
!(mdev->dev->caps.flags2 &
MLX4_DEV_CAP_FLAG2_SKIP_OUTER_VLAN))
dev->hw_features |= NETIF_F_HW_VLAN_STAG_TX;
}
if (mdev->dev->caps.flags & MLX4_DEV_CAP_FLAG_FCS_KEEP)
dev->hw_features |= NETIF_F_RXFCS;

16
drivers/net/ethernet/mellanox/mlx4/en_rx.c
Просмотреть файл

@ -912,6 +912,12 @@ int mlx4_en_process_rx_cq(struct net_device *dev, struct mlx4_en_cq *cq, int bud
u16 vid = be16_to_cpu(cqe->sl_vid);
__vlan_hwaccel_put_tag(gro_skb, htons(ETH_P_8021Q), vid);
} else if ((be32_to_cpu(cqe->vlan_my_qpn) &
MLX4_CQE_SVLAN_PRESENT_MASK) &&
(dev->features & NETIF_F_HW_VLAN_STAG_RX)) {
__vlan_hwaccel_put_tag(gro_skb,
htons(ETH_P_8021AD),
be16_to_cpu(cqe->sl_vid));
}
if (dev->features & NETIF_F_RXHASH)
@ -973,6 +979,11 @@ int mlx4_en_process_rx_cq(struct net_device *dev, struct mlx4_en_cq *cq, int bud
MLX4_CQE_CVLAN_PRESENT_MASK) &&
(dev->features & NETIF_F_HW_VLAN_CTAG_RX))
__vlan_hwaccel_put_tag(skb, htons(ETH_P_8021Q), be16_to_cpu(cqe->sl_vid));
else if ((be32_to_cpu(cqe->vlan_my_qpn) &
MLX4_CQE_SVLAN_PRESENT_MASK) &&
(dev->features & NETIF_F_HW_VLAN_STAG_RX))
__vlan_hwaccel_put_tag(skb, htons(ETH_P_8021AD),
be16_to_cpu(cqe->sl_vid));
if (ring->hwtstamp_rx_filter == HWTSTAMP_FILTER_ALL) {
timestamp = mlx4_en_get_cqe_ts(cqe);
@ -1070,7 +1081,10 @@ static const int frag_sizes[] = {
void mlx4_en_calc_rx_buf(struct net_device *dev)
{
struct mlx4_en_priv *priv = netdev_priv(dev);
int eff_mtu = dev->mtu + ETH_HLEN + VLAN_HLEN;
/* VLAN_HLEN is added twice,to support skb vlan tagged with multiple
* headers. (For example: ETH_P_8021Q and ETH_P_8021AD).
*/
int eff_mtu = dev->mtu + ETH_HLEN + (2 * VLAN_HLEN);
int buf_size = 0;
int i = 0;

13
drivers/net/ethernet/mellanox/mlx4/en_tx.c
Просмотреть файл

@ -718,6 +718,7 @@ netdev_tx_t mlx4_en_xmit(struct sk_buff *skb, struct net_device *dev)
u32 index, bf_index;
__be32 op_own;
u16 vlan_tag = 0;
u16 vlan_proto = 0;
int i_frag;
int lso_header_size;
void *fragptr = NULL;
@ -750,9 +751,10 @@ netdev_tx_t mlx4_en_xmit(struct sk_buff *skb, struct net_device *dev)
goto tx_drop;
}
if (skb_vlan_tag_present(skb))
if (skb_vlan_tag_present(skb)) {
vlan_tag = skb_vlan_tag_get(skb);
vlan_proto = be16_to_cpu(skb->vlan_proto);
}
netdev_txq_bql_enqueue_prefetchw(ring->tx_queue);
@ -958,8 +960,11 @@ netdev_tx_t mlx4_en_xmit(struct sk_buff *skb, struct net_device *dev)
ring->bf.offset ^= ring->bf.buf_size;
} else {
tx_desc->ctrl.vlan_tag = cpu_to_be16(vlan_tag);
tx_desc->ctrl.ins_vlan = MLX4_WQE_CTRL_INS_CVLAN *
!!skb_vlan_tag_present(skb);
if (vlan_proto == ETH_P_8021AD)
tx_desc->ctrl.ins_vlan = MLX4_WQE_CTRL_INS_SVLAN;
else if (vlan_proto == ETH_P_8021Q)
tx_desc->ctrl.ins_vlan = MLX4_WQE_CTRL_INS_CVLAN;
tx_desc->ctrl.fence_size = real_size;
/* Ensure new descriptor hits memory

1
drivers/net/ethernet/mellanox/mlx4/mlx4_en.h
Просмотреть файл

@ -95,6 +95,7 @@
*/
#define MLX4_EN_PRIV_FLAGS_BLUEFLAME 1
#define MLX4_EN_PRIV_FLAGS_PHV 2
#define MLX4_EN_WATCHDOG_TIMEOUT (15 * HZ)

1
include/linux/mlx4/cq.h
Просмотреть файл

@ -89,6 +89,7 @@ struct mlx4_ts_cqe {
enum {
MLX4_CQE_L2_TUNNEL_IPOK = 1 << 31,
MLX4_CQE_CVLAN_PRESENT_MASK = 1 << 29,
MLX4_CQE_SVLAN_PRESENT_MASK = 1 << 30,
MLX4_CQE_L2_TUNNEL = 1 << 27,
MLX4_CQE_L2_TUNNEL_CSUM = 1 << 26,
MLX4_CQE_L2_TUNNEL_IPV4 = 1 << 25,

1
include/linux/mlx4/qp.h
Просмотреть файл

@ -273,6 +273,7 @@ enum {
MLX4_WQE_CTRL_IP_CSUM = 1 << 4,
MLX4_WQE_CTRL_TCP_UDP_CSUM = 1 << 5,
MLX4_WQE_CTRL_INS_CVLAN = 1 << 6,
MLX4_WQE_CTRL_INS_SVLAN = 1 << 7,
MLX4_WQE_CTRL_STRONG_ORDER = 1 << 7,
MLX4_WQE_CTRL_FORCE_LOOPBACK = 1 << 0,
};