From f53577f0692556bbe5ae096cea47b891dac33172 Mon Sep 17 00:00:00 2001 From: Zhe Tao Date: Fri, 30 Oct 2015 12:57:35 +0800 Subject: [PATCH] i40e: support flow control Feature Add: Rx/Tx flow control support for the i40e All the Rx/Tx LFC enable/disable operation is done by the F/W, so PMD driver need to use the Set PHY Config AD command to trigger the PHY to do the auto-negotiation, after the Tx/Rx pause ability is negotiated, the F/W will help us to set the related LFC enable/disable registers. PMD driver also need to configure the related registers to control how often to send the pause frame and what the value in the pause frame. Signed-off-by: Zhe Tao Acked-by: Jingjing Wu Acked-by: Helin Zhang --- doc/guides/rel_notes/release_2_2.rst | 2 + drivers/net/i40e/i40e_ethdev.c | 170 ++++++++++++++++++++++++++- drivers/net/i40e/i40e_ethdev.h | 12 ++ 3 files changed, 181 insertions(+), 3 deletions(-) diff --git a/doc/guides/rel_notes/release_2_2.rst b/doc/guides/rel_notes/release_2_2.rst index 89e4d5836f..01f69de17a 100644 --- a/doc/guides/rel_notes/release_2_2.rst +++ b/doc/guides/rel_notes/release_2_2.rst @@ -18,6 +18,8 @@ New Features * Add 2 new flow director modes on x550. * One is MAC VLAN mode, the other is tunnel mode. +* **Added i40e flow control support.** + * **Added fm10k TSO support for both PF and VF.** * **New NIC Boulder Rapid support.** diff --git a/drivers/net/i40e/i40e_ethdev.c b/drivers/net/i40e/i40e_ethdev.c index 963e501a64..497fee76a2 100644 --- a/drivers/net/i40e/i40e_ethdev.c +++ b/drivers/net/i40e/i40e_ethdev.c @@ -81,6 +81,27 @@ #define I40E_PRE_TX_Q_CFG_WAIT_US 10 /* 10 us */ +/* Flow control default timer */ +#define I40E_DEFAULT_PAUSE_TIME 0xFFFFU + +/* Flow control default high water */ +#define I40E_DEFAULT_HIGH_WATER (0x1C40/1024) + +/* Flow control default low water */ +#define I40E_DEFAULT_LOW_WATER (0x1A40/1024) + +/* Flow control enable fwd bit */ +#define I40E_PRTMAC_FWD_CTRL 0x00000001 + +/* Receive Packet Buffer size */ +#define I40E_RXPBSIZE (968 * 1024) + +/* Kilobytes shift */ +#define I40E_KILOSHIFT 10 + +/* Receive Average Packet Size in Byte*/ +#define I40E_PACKET_AVERAGE_SIZE 128 + /* Mask of PF interrupt causes */ #define I40E_PFINT_ICR0_ENA_MASK ( \ I40E_PFINT_ICR0_ENA_ECC_ERR_MASK | \ @@ -145,6 +166,8 @@ static void i40e_vlan_strip_queue_set(struct rte_eth_dev *dev, static int i40e_vlan_pvid_set(struct rte_eth_dev *dev, uint16_t pvid, int on); static int i40e_dev_led_on(struct rte_eth_dev *dev); static int i40e_dev_led_off(struct rte_eth_dev *dev); +static int i40e_flow_ctrl_get(struct rte_eth_dev *dev, + struct rte_eth_fc_conf *fc_conf); static int i40e_flow_ctrl_set(struct rte_eth_dev *dev, struct rte_eth_fc_conf *fc_conf); static int i40e_priority_flow_ctrl_set(struct rte_eth_dev *dev, @@ -272,6 +295,7 @@ static const struct eth_dev_ops i40e_eth_dev_ops = { .tx_queue_release = i40e_dev_tx_queue_release, .dev_led_on = i40e_dev_led_on, .dev_led_off = i40e_dev_led_off, + .flow_ctrl_get = i40e_flow_ctrl_get, .flow_ctrl_set = i40e_flow_ctrl_set, .priority_flow_ctrl_set = i40e_priority_flow_ctrl_set, .mac_addr_add = i40e_macaddr_add, @@ -1812,12 +1836,148 @@ i40e_dev_led_off(struct rte_eth_dev *dev) } static int -i40e_flow_ctrl_set(__rte_unused struct rte_eth_dev *dev, - __rte_unused struct rte_eth_fc_conf *fc_conf) +i40e_flow_ctrl_get(struct rte_eth_dev *dev, struct rte_eth_fc_conf *fc_conf) { + struct i40e_hw *hw = I40E_DEV_PRIVATE_TO_HW(dev->data->dev_private); + struct i40e_pf *pf = I40E_DEV_PRIVATE_TO_PF(dev->data->dev_private); + + fc_conf->pause_time = pf->fc_conf.pause_time; + fc_conf->high_water = pf->fc_conf.high_water[I40E_MAX_TRAFFIC_CLASS]; + fc_conf->low_water = pf->fc_conf.low_water[I40E_MAX_TRAFFIC_CLASS]; + + /* Return current mode according to actual setting*/ + switch (hw->fc.current_mode) { + case I40E_FC_FULL: + fc_conf->mode = RTE_FC_FULL; + break; + case I40E_FC_TX_PAUSE: + fc_conf->mode = RTE_FC_TX_PAUSE; + break; + case I40E_FC_RX_PAUSE: + fc_conf->mode = RTE_FC_RX_PAUSE; + break; + case I40E_FC_NONE: + default: + fc_conf->mode = RTE_FC_NONE; + }; + + return 0; +} + +static int +i40e_flow_ctrl_set(struct rte_eth_dev *dev, struct rte_eth_fc_conf *fc_conf) +{ + uint32_t mflcn_reg, fctrl_reg, reg; + uint32_t max_high_water; + uint8_t i, aq_failure; + int err; + struct i40e_hw *hw; + struct i40e_pf *pf; + enum i40e_fc_mode rte_fcmode_2_i40e_fcmode[] = { + [RTE_FC_NONE] = I40E_FC_NONE, + [RTE_FC_RX_PAUSE] = I40E_FC_RX_PAUSE, + [RTE_FC_TX_PAUSE] = I40E_FC_TX_PAUSE, + [RTE_FC_FULL] = I40E_FC_FULL + }; + + /* high_water field in the rte_eth_fc_conf using the kilobytes unit */ + + max_high_water = I40E_RXPBSIZE >> I40E_KILOSHIFT; + if ((fc_conf->high_water > max_high_water) || + (fc_conf->high_water < fc_conf->low_water)) { + PMD_INIT_LOG(ERR, "Invalid high/low water setup value in KB, " + "High_water must <= %d.", max_high_water); + return -EINVAL; + } + + hw = I40E_DEV_PRIVATE_TO_HW(dev->data->dev_private); + pf = I40E_DEV_PRIVATE_TO_PF(dev->data->dev_private); + hw->fc.requested_mode = rte_fcmode_2_i40e_fcmode[fc_conf->mode]; + + pf->fc_conf.pause_time = fc_conf->pause_time; + pf->fc_conf.high_water[I40E_MAX_TRAFFIC_CLASS] = fc_conf->high_water; + pf->fc_conf.low_water[I40E_MAX_TRAFFIC_CLASS] = fc_conf->low_water; + PMD_INIT_FUNC_TRACE(); - return -ENOSYS; + /* All the link flow control related enable/disable register + * configuration is handle by the F/W + */ + err = i40e_set_fc(hw, &aq_failure, true); + if (err < 0) + return -ENOSYS; + + if (i40e_is_40G_device(hw->device_id)) { + /* Configure flow control refresh threshold, + * the value for stat_tx_pause_refresh_timer[8] + * is used for global pause operation. + */ + + I40E_WRITE_REG(hw, + I40E_PRTMAC_HSEC_CTL_TX_PAUSE_REFRESH_TIMER(8), + pf->fc_conf.pause_time); + + /* configure the timer value included in transmitted pause + * frame, + * the value for stat_tx_pause_quanta[8] is used for global + * pause operation + */ + I40E_WRITE_REG(hw, I40E_PRTMAC_HSEC_CTL_TX_PAUSE_QUANTA(8), + pf->fc_conf.pause_time); + + fctrl_reg = I40E_READ_REG(hw, + I40E_PRTMAC_HSEC_CTL_RX_FORWARD_CONTROL); + + if (fc_conf->mac_ctrl_frame_fwd != 0) + fctrl_reg |= I40E_PRTMAC_FWD_CTRL; + else + fctrl_reg &= ~I40E_PRTMAC_FWD_CTRL; + + I40E_WRITE_REG(hw, I40E_PRTMAC_HSEC_CTL_RX_FORWARD_CONTROL, + fctrl_reg); + } else { + /* Configure pause time (2 TCs per register) */ + reg = (uint32_t)pf->fc_conf.pause_time * (uint32_t)0x00010001; + for (i = 0; i < I40E_MAX_TRAFFIC_CLASS / 2; i++) + I40E_WRITE_REG(hw, I40E_PRTDCB_FCTTVN(i), reg); + + /* Configure flow control refresh threshold value */ + I40E_WRITE_REG(hw, I40E_PRTDCB_FCRTV, + pf->fc_conf.pause_time / 2); + + mflcn_reg = I40E_READ_REG(hw, I40E_PRTDCB_MFLCN); + + /* set or clear MFLCN.PMCF & MFLCN.DPF bits + *depending on configuration + */ + if (fc_conf->mac_ctrl_frame_fwd != 0) { + mflcn_reg |= I40E_PRTDCB_MFLCN_PMCF_MASK; + mflcn_reg &= ~I40E_PRTDCB_MFLCN_DPF_MASK; + } else { + mflcn_reg &= ~I40E_PRTDCB_MFLCN_PMCF_MASK; + mflcn_reg |= I40E_PRTDCB_MFLCN_DPF_MASK; + } + + I40E_WRITE_REG(hw, I40E_PRTDCB_MFLCN, mflcn_reg); + } + + /* config the water marker both based on the packets and bytes */ + I40E_WRITE_REG(hw, I40E_GLRPB_PHW, + (pf->fc_conf.high_water[I40E_MAX_TRAFFIC_CLASS] + << I40E_KILOSHIFT) / I40E_PACKET_AVERAGE_SIZE); + I40E_WRITE_REG(hw, I40E_GLRPB_PLW, + (pf->fc_conf.low_water[I40E_MAX_TRAFFIC_CLASS] + << I40E_KILOSHIFT) / I40E_PACKET_AVERAGE_SIZE); + I40E_WRITE_REG(hw, I40E_GLRPB_GHW, + pf->fc_conf.high_water[I40E_MAX_TRAFFIC_CLASS] + << I40E_KILOSHIFT); + I40E_WRITE_REG(hw, I40E_GLRPB_GLW, + pf->fc_conf.low_water[I40E_MAX_TRAFFIC_CLASS] + << I40E_KILOSHIFT); + + I40E_WRITE_FLUSH(hw); + + return 0; } static int @@ -2277,6 +2437,10 @@ i40e_pf_parameter_init(struct rte_eth_dev *dev) PMD_INIT_LOG(ERR, "HW configuration doesn't support SRIOV"); return -EINVAL; } + /* Add the parameter init for LFC */ + pf->fc_conf.pause_time = I40E_DEFAULT_PAUSE_TIME; + pf->fc_conf.high_water[I40E_MAX_TRAFFIC_CLASS] = I40E_DEFAULT_HIGH_WATER; + pf->fc_conf.low_water[I40E_MAX_TRAFFIC_CLASS] = I40E_DEFAULT_LOW_WATER; pf->flags = I40E_FLAG_HEADER_SPLIT_DISABLED; pf->max_num_vsi = RTE_MIN(hw->func_caps.num_vsis, I40E_MAX_NUM_VSIS); diff --git a/drivers/net/i40e/i40e_ethdev.h b/drivers/net/i40e/i40e_ethdev.h index d42487d4d8..70804e186c 100644 --- a/drivers/net/i40e/i40e_ethdev.h +++ b/drivers/net/i40e/i40e_ethdev.h @@ -286,6 +286,17 @@ struct i40e_pf_vf { uint16_t reset_cnt; /* Total vf reset times */ }; +/* + * Structure to store private data for flow control. + */ +struct i40e_fc_conf { + uint16_t pause_time; /* Flow control pause timer */ + /* FC high water 0-7 for pfc and 8 for lfc unit:kilobytes */ + uint32_t high_water[I40E_MAX_TRAFFIC_CLASS + 1]; + /* FC low water 0-7 for pfc and 8 for lfc unit:kilobytes */ + uint32_t low_water[I40E_MAX_TRAFFIC_CLASS + 1]; +}; + /* * Structure to store private data for VMDQ instance */ @@ -390,6 +401,7 @@ struct i40e_pf { struct i40e_vmdq_info *vmdq; struct i40e_fdir_info fdir; /* flow director info */ + struct i40e_fc_conf fc_conf; /* Flow control conf */ struct i40e_mirror_rule_list mirror_list; uint16_t nb_mirror_rule; /* The number of mirror rules */ }; -- 2.20.1