From 5c50368f38317627421bf24a0b66b1af0d44eddc Mon Sep 17 00:00:00 2001 From: Achiad Shochat Date: Tue, 4 Aug 2015 14:05:43 +0300 Subject: [PATCH] net/mlx5e: Light-weight netdev open/stop Create/destroy TIRs, TISs and flow tables upon PCI probe/remove rather than upon the netdev ndo_open/stop. Upon ndo_stop(), redirect all RX traffic to the (lately introduced) "Drop RQ" and then close only the RX/TX rings, leaving the TIRs, TISs and flow tables alive. Signed-off-by: Achiad Shochat Signed-off-by: Amir Vadai Signed-off-by: David S. Miller --- .../net/ethernet/mellanox/mlx5/core/en_main.c | 237 ++++++++++++------ .../ethernet/mellanox/mlx5/core/transobj.c | 12 + .../ethernet/mellanox/mlx5/core/transobj.h | 2 + include/linux/mlx5/mlx5_ifc.h | 9 +- 4 files changed, 184 insertions(+), 76 deletions(-) diff --git a/drivers/net/ethernet/mellanox/mlx5/core/en_main.c b/drivers/net/ethernet/mellanox/mlx5/core/en_main.c index baa7a69bb694..33d08bb11f84 100644 --- a/drivers/net/ethernet/mellanox/mlx5/core/en_main.c +++ b/drivers/net/ethernet/mellanox/mlx5/core/en_main.c @@ -1301,14 +1301,18 @@ static void mlx5e_fill_rqt_rqns(struct mlx5e_priv *priv, void *rqtc, ix = ix % priv->params.num_channels; MLX5_SET(rqtc, rqtc, rq_num[i], - priv->channel[ix]->rq.rqn); + test_bit(MLX5E_STATE_OPENED, &priv->state) ? + priv->channel[ix]->rq.rqn : + priv->drop_rq.rqn); } break; default: /* MLX5E_SINGLE_RQ_RQT */ MLX5_SET(rqtc, rqtc, rq_num[0], - priv->channel[0]->rq.rqn); + test_bit(MLX5E_STATE_OPENED, &priv->state) ? + priv->channel[0]->rq.rqn : + priv->drop_rq.rqn); break; } @@ -1347,19 +1351,95 @@ static int mlx5e_open_rqt(struct mlx5e_priv *priv, enum mlx5e_rqt_ix rqt_ix) return err; } +static int mlx5e_redirect_rqt(struct mlx5e_priv *priv, enum mlx5e_rqt_ix rqt_ix) +{ + struct mlx5_core_dev *mdev = priv->mdev; + u32 *in; + void *rqtc; + int inlen; + int log_sz; + int sz; + int err; + + log_sz = (rqt_ix == MLX5E_SINGLE_RQ_RQT) ? 0 : + priv->params.rx_hash_log_tbl_sz; + sz = 1 << log_sz; + + inlen = MLX5_ST_SZ_BYTES(modify_rqt_in) + sizeof(u32) * sz; + in = mlx5_vzalloc(inlen); + if (!in) + return -ENOMEM; + + rqtc = MLX5_ADDR_OF(modify_rqt_in, in, ctx); + + MLX5_SET(rqtc, rqtc, rqt_actual_size, sz); + + mlx5e_fill_rqt_rqns(priv, rqtc, rqt_ix); + + MLX5_SET(modify_rqt_in, in, bitmask.rqn_list, 1); + + err = mlx5_core_modify_rqt(mdev, priv->rqtn[rqt_ix], in, inlen); + + kvfree(in); + + return err; +} + static void mlx5e_close_rqt(struct mlx5e_priv *priv, enum mlx5e_rqt_ix rqt_ix) { mlx5_core_destroy_rqt(priv->mdev, priv->rqtn[rqt_ix]); } +static void mlx5e_build_tir_ctx_lro(void *tirc, struct mlx5e_priv *priv) +{ + if (!priv->params.lro_en) + return; + +#define ROUGH_MAX_L2_L3_HDR_SZ 256 + + MLX5_SET(tirc, tirc, lro_enable_mask, + MLX5_TIRC_LRO_ENABLE_MASK_IPV4_LRO | + MLX5_TIRC_LRO_ENABLE_MASK_IPV6_LRO); + MLX5_SET(tirc, tirc, lro_max_ip_payload_size, + (priv->params.lro_wqe_sz - + ROUGH_MAX_L2_L3_HDR_SZ) >> 8); + MLX5_SET(tirc, tirc, lro_timeout_period_usecs, + MLX5_CAP_ETH(priv->mdev, + lro_timer_supported_periods[3])); +} + +static int mlx5e_modify_tir_lro(struct mlx5e_priv *priv, int tt) +{ + struct mlx5_core_dev *mdev = priv->mdev; + + void *in; + void *tirc; + int inlen; + int err; + + inlen = MLX5_ST_SZ_BYTES(modify_tir_in); + in = mlx5_vzalloc(inlen); + if (!in) + return -ENOMEM; + + MLX5_SET(modify_tir_in, in, bitmask.lro, 1); + tirc = MLX5_ADDR_OF(modify_tir_in, in, ctx); + + mlx5e_build_tir_ctx_lro(tirc, priv); + + err = mlx5_core_modify_tir(mdev, priv->tirn[tt], in, inlen); + + kvfree(in); + + return err; +} + static void mlx5e_build_tir_ctx(struct mlx5e_priv *priv, u32 *tirc, int tt) { void *hfso = MLX5_ADDR_OF(tirc, tirc, rx_hash_field_selector_outer); MLX5_SET(tirc, tirc, transport_domain, priv->tdn); -#define ROUGH_MAX_L2_L3_HDR_SZ 256 - #define MLX5_HASH_IP (MLX5_HASH_FIELD_SEL_SRC_IP |\ MLX5_HASH_FIELD_SEL_DST_IP) @@ -1372,17 +1452,7 @@ static void mlx5e_build_tir_ctx(struct mlx5e_priv *priv, u32 *tirc, int tt) MLX5_HASH_FIELD_SEL_DST_IP |\ MLX5_HASH_FIELD_SEL_IPSEC_SPI) - if (priv->params.lro_en) { - MLX5_SET(tirc, tirc, lro_enable_mask, - MLX5_TIRC_LRO_ENABLE_MASK_IPV4_LRO | - MLX5_TIRC_LRO_ENABLE_MASK_IPV6_LRO); - MLX5_SET(tirc, tirc, lro_max_ip_payload_size, - (priv->params.lro_wqe_sz - - ROUGH_MAX_L2_L3_HDR_SZ) >> 8); - MLX5_SET(tirc, tirc, lro_timeout_period_usecs, - MLX5_CAP_ETH(priv->mdev, - lro_timer_supported_periods[3])); - } + mlx5e_build_tir_ctx_lro(tirc, priv); MLX5_SET(tirc, tirc, disp_type, MLX5_TIRC_DISP_TYPE_INDIRECT); @@ -1568,12 +1638,20 @@ static int mlx5e_set_dev_port_mtu(struct net_device *netdev) return 0; } +static void mlx5e_redirect_rqts(struct mlx5e_priv *priv) +{ + mlx5e_redirect_rqt(priv, MLX5E_INDIRECTION_RQT); + mlx5e_redirect_rqt(priv, MLX5E_SINGLE_RQ_RQT); +} + int mlx5e_open_locked(struct net_device *netdev) { struct mlx5e_priv *priv = netdev_priv(netdev); int num_txqs; int err; + set_bit(MLX5E_STATE_OPENED, &priv->state); + num_txqs = priv->params.num_channels * priv->params.num_tc; netif_set_real_num_tx_queues(netdev, num_txqs); netif_set_real_num_rx_queues(netdev, priv->params.num_channels); @@ -1582,83 +1660,32 @@ int mlx5e_open_locked(struct net_device *netdev) if (err) return err; - err = mlx5e_open_tises(priv); - if (err) { - netdev_err(netdev, "%s: mlx5e_open_tises failed, %d\n", - __func__, err); - return err; - } - err = mlx5e_open_channels(priv); if (err) { netdev_err(netdev, "%s: mlx5e_open_channels failed, %d\n", __func__, err); - goto err_close_tises; - } - - err = mlx5e_open_rqt(priv, MLX5E_INDIRECTION_RQT); - if (err) { - netdev_err(netdev, "%s: mlx5e_open_rqt(INDIR) failed, %d\n", - __func__, err); - goto err_close_channels; - } - - err = mlx5e_open_rqt(priv, MLX5E_SINGLE_RQ_RQT); - if (err) { - netdev_err(netdev, "%s: mlx5e_open_rqt(SINGLE) failed, %d\n", - __func__, err); - goto err_close_rqt_indir; - } - - err = mlx5e_open_tirs(priv); - if (err) { - netdev_err(netdev, "%s: mlx5e_open_tir failed, %d\n", - __func__, err); - goto err_close_rqt_single; - } - - err = mlx5e_open_flow_table(priv); - if (err) { - netdev_err(netdev, "%s: mlx5e_open_flow_table failed, %d\n", - __func__, err); - goto err_close_tirs; + return err; } err = mlx5e_add_all_vlan_rules(priv); if (err) { netdev_err(netdev, "%s: mlx5e_add_all_vlan_rules failed, %d\n", __func__, err); - goto err_close_flow_table; + goto err_close_channels; } mlx5e_init_eth_addr(priv); - set_bit(MLX5E_STATE_OPENED, &priv->state); - mlx5e_update_carrier(priv); + mlx5e_redirect_rqts(priv); mlx5e_set_rx_mode_core(priv); schedule_delayed_work(&priv->update_stats_work, 0); return 0; -err_close_flow_table: - mlx5e_close_flow_table(priv); - -err_close_tirs: - mlx5e_close_tirs(priv); - -err_close_rqt_single: - mlx5e_close_rqt(priv, MLX5E_SINGLE_RQ_RQT); - -err_close_rqt_indir: - mlx5e_close_rqt(priv, MLX5E_INDIRECTION_RQT); - err_close_channels: mlx5e_close_channels(priv); -err_close_tises: - mlx5e_close_tises(priv); - return err; } @@ -1682,13 +1709,9 @@ int mlx5e_close_locked(struct net_device *netdev) mlx5e_set_rx_mode_core(priv); mlx5e_del_all_vlan_rules(priv); + mlx5e_redirect_rqts(priv); netif_carrier_off(priv->netdev); - mlx5e_close_flow_table(priv); - mlx5e_close_tirs(priv); - mlx5e_close_rqt(priv, MLX5E_SINGLE_RQ_RQT); - mlx5e_close_rqt(priv, MLX5E_INDIRECTION_RQT); mlx5e_close_channels(priv); - mlx5e_close_tises(priv); return 0; } @@ -1766,6 +1789,8 @@ static int mlx5e_set_features(struct net_device *netdev, mlx5e_close_locked(priv->netdev); priv->params.lro_en = !!(features & NETIF_F_LRO); + mlx5e_modify_tir_lro(priv, MLX5E_TT_IPV4_TCP); + mlx5e_modify_tir_lro(priv, MLX5E_TT_IPV6_TCP); if (was_opened) err = mlx5e_open_locked(priv->netdev); @@ -2026,16 +2051,72 @@ static void *mlx5e_create_netdev(struct mlx5_core_dev *mdev) goto err_dealloc_transport_domain; } + err = mlx5e_open_tises(priv); + if (err) { + mlx5_core_warn(mdev, "open tises failed, %d\n", err); + goto err_destroy_mkey; + } + + err = mlx5e_open_drop_rq(priv); + if (err) { + mlx5_core_err(mdev, "open drop rq failed, %d\n", err); + goto err_close_tises; + } + + err = mlx5e_open_rqt(priv, MLX5E_INDIRECTION_RQT); + if (err) { + mlx5_core_warn(mdev, "open rqt(INDIR) failed, %d\n", err); + goto err_close_drop_rq; + } + + err = mlx5e_open_rqt(priv, MLX5E_SINGLE_RQ_RQT); + if (err) { + mlx5_core_warn(mdev, "open rqt(SINGLE) failed, %d\n", err); + goto err_close_rqt_indir; + } + + err = mlx5e_open_tirs(priv); + if (err) { + mlx5_core_warn(mdev, "open tirs failed, %d\n", err); + goto err_close_rqt_single; + } + + err = mlx5e_open_flow_table(priv); + if (err) { + mlx5_core_warn(mdev, "open flow table failed, %d\n", err); + goto err_close_tirs; + } + + mlx5e_init_eth_addr(priv); + err = register_netdev(netdev); if (err) { mlx5_core_err(mdev, "register_netdev failed, %d\n", err); - goto err_destroy_mkey; + goto err_close_flow_table; } mlx5e_enable_async_events(priv); return priv; +err_close_flow_table: + mlx5e_close_flow_table(priv); + +err_close_tirs: + mlx5e_close_tirs(priv); + +err_close_rqt_single: + mlx5e_close_rqt(priv, MLX5E_SINGLE_RQ_RQT); + +err_close_rqt_indir: + mlx5e_close_rqt(priv, MLX5E_INDIRECTION_RQT); + +err_close_drop_rq: + mlx5e_close_drop_rq(priv); + +err_close_tises: + mlx5e_close_tises(priv); + err_destroy_mkey: mlx5_core_destroy_mkey(mdev, &priv->mr); @@ -2060,6 +2141,12 @@ static void mlx5e_destroy_netdev(struct mlx5_core_dev *mdev, void *vpriv) struct net_device *netdev = priv->netdev; unregister_netdev(netdev); + mlx5e_close_flow_table(priv); + mlx5e_close_tirs(priv); + mlx5e_close_rqt(priv, MLX5E_SINGLE_RQ_RQT); + mlx5e_close_rqt(priv, MLX5E_INDIRECTION_RQT); + mlx5e_close_drop_rq(priv); + mlx5e_close_tises(priv); mlx5_core_destroy_mkey(priv->mdev, &priv->mr); mlx5_dealloc_transport_domain(priv->mdev, priv->tdn); mlx5_core_dealloc_pd(priv->mdev, priv->pdn); diff --git a/drivers/net/ethernet/mellanox/mlx5/core/transobj.c b/drivers/net/ethernet/mellanox/mlx5/core/transobj.c index e6453f61141e..b4c87c7b0cf0 100644 --- a/drivers/net/ethernet/mellanox/mlx5/core/transobj.c +++ b/drivers/net/ethernet/mellanox/mlx5/core/transobj.c @@ -387,6 +387,18 @@ int mlx5_core_create_rqt(struct mlx5_core_dev *dev, u32 *in, int inlen, return err; } +int mlx5_core_modify_rqt(struct mlx5_core_dev *dev, u32 rqtn, u32 *in, + int inlen) +{ + u32 out[MLX5_ST_SZ_DW(modify_rqt_out)]; + + MLX5_SET(modify_rqt_in, in, rqtn, rqtn); + MLX5_SET(modify_rqt_in, in, opcode, MLX5_CMD_OP_MODIFY_RQT); + + memset(out, 0, sizeof(out)); + return mlx5_cmd_exec_check_status(dev, in, inlen, out, sizeof(out)); +} + void mlx5_core_destroy_rqt(struct mlx5_core_dev *dev, u32 rqtn) { u32 in[MLX5_ST_SZ_DW(destroy_rqt_in)]; diff --git a/drivers/net/ethernet/mellanox/mlx5/core/transobj.h b/drivers/net/ethernet/mellanox/mlx5/core/transobj.h index d436c2d8b527..74cae51436e4 100644 --- a/drivers/net/ethernet/mellanox/mlx5/core/transobj.h +++ b/drivers/net/ethernet/mellanox/mlx5/core/transobj.h @@ -65,6 +65,8 @@ int mlx5_core_arm_xsrq(struct mlx5_core_dev *dev, u32 rmpn, u16 lwm); int mlx5_core_create_rqt(struct mlx5_core_dev *dev, u32 *in, int inlen, u32 *rqtn); +int mlx5_core_modify_rqt(struct mlx5_core_dev *dev, u32 rqtn, u32 *in, + int inlen); void mlx5_core_destroy_rqt(struct mlx5_core_dev *dev, u32 rqtn); #endif /* __TRANSOBJ_H__ */ diff --git a/include/linux/mlx5/mlx5_ifc.h b/include/linux/mlx5/mlx5_ifc.h index 469b7bda3304..dd2097455a2e 100644 --- a/include/linux/mlx5/mlx5_ifc.h +++ b/include/linux/mlx5/mlx5_ifc.h @@ -4123,6 +4123,13 @@ struct mlx5_ifc_modify_rqt_out_bits { u8 reserved_1[0x40]; }; +struct mlx5_ifc_rqt_bitmask_bits { + u8 reserved[0x20]; + + u8 reserved1[0x1f]; + u8 rqn_list[0x1]; +}; + struct mlx5_ifc_modify_rqt_in_bits { u8 opcode[0x10]; u8 reserved_0[0x10]; @@ -4135,7 +4142,7 @@ struct mlx5_ifc_modify_rqt_in_bits { u8 reserved_3[0x20]; - u8 modify_bitmask[0x40]; + struct mlx5_ifc_rqt_bitmask_bits bitmask; u8 reserved_4[0x40]; -- 2.30.2