From cdbb29cf4bc4e2c8b6bf0683aa7519edea951b1a Mon Sep 17 00:00:00 2001 From: Andrew Rybchenko Date: Thu, 15 Dec 2016 12:50:56 +0000 Subject: [PATCH] net/sfc: support flow control settings Signed-off-by: Andrew Rybchenko Reviewed-by: Andrew Lee Reviewed-by: Robert Stonehouse --- doc/guides/nics/features/sfc_efx.ini | 1 + doc/guides/nics/sfc_efx.rst | 2 + drivers/net/sfc/sfc_ethdev.c | 98 ++++++++++++++++++++++++++++ drivers/net/sfc/sfc_port.c | 8 +++ 4 files changed, 109 insertions(+) diff --git a/doc/guides/nics/features/sfc_efx.ini b/doc/guides/nics/features/sfc_efx.ini index 698553cc7b..25472f8612 100644 --- a/doc/guides/nics/features/sfc_efx.ini +++ b/doc/guides/nics/features/sfc_efx.ini @@ -5,6 +5,7 @@ ; [Features] Link status = Y +Flow control = Y L3 checksum offload = P L4 checksum offload = P Basic stats = Y diff --git a/doc/guides/nics/sfc_efx.rst b/doc/guides/nics/sfc_efx.rst index eb9d26dd32..06b0c14814 100644 --- a/doc/guides/nics/sfc_efx.rst +++ b/doc/guides/nics/sfc_efx.rst @@ -53,6 +53,8 @@ SFC EFX PMD has support for: - Extended statistics (see Solarflare Server Adapter User's Guide for the statistics description) +- Basic flow control + Non-supported Features ---------------------- diff --git a/drivers/net/sfc/sfc_ethdev.c b/drivers/net/sfc/sfc_ethdev.c index e1125e43f5..0fb5e32714 100644 --- a/drivers/net/sfc/sfc_ethdev.c +++ b/drivers/net/sfc/sfc_ethdev.c @@ -452,6 +452,102 @@ sfc_xstats_get_names(struct rte_eth_dev *dev, return nstats; } +static int +sfc_flow_ctrl_get(struct rte_eth_dev *dev, struct rte_eth_fc_conf *fc_conf) +{ + struct sfc_adapter *sa = dev->data->dev_private; + unsigned int wanted_fc, link_fc; + + memset(fc_conf, 0, sizeof(*fc_conf)); + + sfc_adapter_lock(sa); + + if (sa->state == SFC_ADAPTER_STARTED) + efx_mac_fcntl_get(sa->nic, &wanted_fc, &link_fc); + else + link_fc = sa->port.flow_ctrl; + + switch (link_fc) { + case 0: + fc_conf->mode = RTE_FC_NONE; + break; + case EFX_FCNTL_RESPOND: + fc_conf->mode = RTE_FC_RX_PAUSE; + break; + case EFX_FCNTL_GENERATE: + fc_conf->mode = RTE_FC_TX_PAUSE; + break; + case (EFX_FCNTL_RESPOND | EFX_FCNTL_GENERATE): + fc_conf->mode = RTE_FC_FULL; + break; + default: + sfc_err(sa, "%s: unexpected flow control value %#x", + __func__, link_fc); + } + + fc_conf->autoneg = sa->port.flow_ctrl_autoneg; + + sfc_adapter_unlock(sa); + + return 0; +} + +static int +sfc_flow_ctrl_set(struct rte_eth_dev *dev, struct rte_eth_fc_conf *fc_conf) +{ + struct sfc_adapter *sa = dev->data->dev_private; + struct sfc_port *port = &sa->port; + unsigned int fcntl; + int rc; + + if (fc_conf->high_water != 0 || fc_conf->low_water != 0 || + fc_conf->pause_time != 0 || fc_conf->send_xon != 0 || + fc_conf->mac_ctrl_frame_fwd != 0) { + sfc_err(sa, "unsupported flow control settings specified"); + rc = EINVAL; + goto fail_inval; + } + + switch (fc_conf->mode) { + case RTE_FC_NONE: + fcntl = 0; + break; + case RTE_FC_RX_PAUSE: + fcntl = EFX_FCNTL_RESPOND; + break; + case RTE_FC_TX_PAUSE: + fcntl = EFX_FCNTL_GENERATE; + break; + case RTE_FC_FULL: + fcntl = EFX_FCNTL_RESPOND | EFX_FCNTL_GENERATE; + break; + default: + rc = EINVAL; + goto fail_inval; + } + + sfc_adapter_lock(sa); + + if (sa->state == SFC_ADAPTER_STARTED) { + rc = efx_mac_fcntl_set(sa->nic, fcntl, fc_conf->autoneg); + if (rc != 0) + goto fail_mac_fcntl_set; + } + + port->flow_ctrl = fcntl; + port->flow_ctrl_autoneg = fc_conf->autoneg; + + sfc_adapter_unlock(sa); + + return 0; + +fail_mac_fcntl_set: + sfc_adapter_unlock(sa); +fail_inval: + SFC_ASSERT(rc > 0); + return -rc; +} + static const struct eth_dev_ops sfc_eth_dev_ops = { .dev_configure = sfc_dev_configure, .dev_start = sfc_dev_start, @@ -466,6 +562,8 @@ static const struct eth_dev_ops sfc_eth_dev_ops = { .rx_queue_release = sfc_rx_queue_release, .tx_queue_setup = sfc_tx_queue_setup, .tx_queue_release = sfc_tx_queue_release, + .flow_ctrl_get = sfc_flow_ctrl_get, + .flow_ctrl_set = sfc_flow_ctrl_set, }; static int diff --git a/drivers/net/sfc/sfc_port.c b/drivers/net/sfc/sfc_port.c index d8ff097ed3..ccc085463e 100644 --- a/drivers/net/sfc/sfc_port.c +++ b/drivers/net/sfc/sfc_port.c @@ -79,6 +79,13 @@ sfc_port_start(struct sfc_adapter *sa) if (rc != 0) goto fail_port_init; + sfc_log_init(sa, "set flow control to %#x autoneg=%u", + port->flow_ctrl, port->flow_ctrl_autoneg); + rc = efx_mac_fcntl_set(sa->nic, port->flow_ctrl, + port->flow_ctrl_autoneg); + if (rc != 0) + goto fail_mac_fcntl_set; + sfc_log_init(sa, "set MAC PDU %u", (unsigned int)port->pdu); rc = efx_mac_pdu_set(sa->nic, port->pdu); if (rc != 0) @@ -124,6 +131,7 @@ fail_mac_stats_periodic: fail_mac_filter_set: fail_mac_addr_set: fail_mac_pdu_set: +fail_mac_fcntl_set: efx_port_fini(sa->nic); fail_port_init: -- 2.20.1