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Miller" , Alexandre Torgue , Jose Abreu , Eric Dumazet , Jakub Kicinski , Paolo Abeni , Maxime Coquelin , Joao Pinto Cc: netdev@vger.kernel.org, linux-stm32@st-md-mailman.stormreply.com, linux-arm-kernel@lists.infradead.org, linux-kernel@vger.kernel.org, xfr@outlook.com, rock.xu@nio.com, Furong Xu <0x1207@gmail.com> Subject: [PATCH net-next v1 1/5] net: stmmac: configure FPE via ethtool-mm Date: Wed, 31 Jul 2024 18:43:12 +0800 Message-Id: X-Mailer: git-send-email 2.34.1 In-Reply-To: References: Precedence: bulk X-Mailing-List: netdev@vger.kernel.org List-Id: List-Subscribe: List-Unsubscribe: MIME-Version: 1.0 X-Patchwork-Delegate: kuba@kernel.org Implement ethtool --show-mm and --set-mm callbacks. 0) Setup two DWMAC CORE 5.10a devices, connect in a back-to-back manner. 1) After kernel booted, get initial status: ethtool --include-statistics --json --show-mm eth1 [ { "ifname": "eth1", "pmac-enabled": true, "tx-enabled": false, "tx-active": false, "tx-min-frag-size": 60, "rx-min-frag-size": 60, "verify-enabled": false, "verify-time": 0, "max-verify-time": 128, "verify-status": "DISABLED", "statistics": { "MACMergeFrameAssErrorCount": 0, "MACMergeFrameSmdErrorCount": 0, "MACMergeFrameAssOkCount": 0, "MACMergeFragCountRx": 0, "MACMergeFragCountTx": 0, "MACMergeHoldCount": 0 } } ] 3) Enable FPE on local device, keep FPE disabled on remote device: ethtool --set-mm eth1 verify-enabled on verify-time 100 tx-enabled on 4) Get status on local device: ethtool --include-statistics --json --show-mm eth1 [ { "ifname": "eth1", "pmac-enabled": true, "tx-enabled": true, "tx-active": false, "tx-min-frag-size": 60, "rx-min-frag-size": 60, "verify-enabled": true, "verify-time": 100, "max-verify-time": 128, "verify-status": "VERIFYING", "statistics": { "MACMergeFrameAssErrorCount": 0, "MACMergeFrameSmdErrorCount": 0, "MACMergeFrameAssOkCount": 0, "MACMergeFragCountRx": 0, "MACMergeFragCountTx": 0, "MACMergeHoldCount": 0 } } ] 5) Enable FPE on remote device, handshake can be finished now: ethtool --set-mm eth1 verify-enabled on verify-time 100 tx-enabled on 6) Get status on local and remote device, both report SUCCEEDED: ethtool --include-statistics --json --show-mm eth1 [ { "ifname": "eth1", "pmac-enabled": true, "tx-enabled": true, "tx-active": true, "tx-min-frag-size": 60, "rx-min-frag-size": 60, "verify-enabled": true, "verify-time": 100, "max-verify-time": 128, "verify-status": "SUCCEEDED", "statistics": { "MACMergeFrameAssErrorCount": 0, "MACMergeFrameSmdErrorCount": 0, "MACMergeFrameAssOkCount": 0, "MACMergeFragCountRx": 0, "MACMergeFragCountTx": 0, "MACMergeHoldCount": 0 } } ] 7) tc-mqprio or tc-taprio can be used to select whether traffic classes are express or preemptible. Signed-off-by: Furong Xu <0x1207@gmail.com> --- .../net/ethernet/stmicro/stmmac/dwmac4_core.c | 4 + drivers/net/ethernet/stmicro/stmmac/dwmac5.c | 17 +++ drivers/net/ethernet/stmicro/stmmac/dwmac5.h | 5 + drivers/net/ethernet/stmicro/stmmac/hwif.h | 6 + drivers/net/ethernet/stmicro/stmmac/stmmac.h | 3 + .../ethernet/stmicro/stmmac/stmmac_ethtool.c | 111 ++++++++++++++++++ .../net/ethernet/stmicro/stmmac/stmmac_main.c | 9 +- include/linux/stmmac.h | 1 + 8 files changed, 149 insertions(+), 7 deletions(-) diff --git a/drivers/net/ethernet/stmicro/stmmac/dwmac4_core.c b/drivers/net/ethernet/stmicro/stmmac/dwmac4_core.c index f98741d2607e..af871cce767e 100644 --- a/drivers/net/ethernet/stmicro/stmmac/dwmac4_core.c +++ b/drivers/net/ethernet/stmicro/stmmac/dwmac4_core.c @@ -1268,6 +1268,8 @@ const struct stmmac_ops dwmac410_ops = { .fpe_configure = dwmac5_fpe_configure, .fpe_send_mpacket = dwmac5_fpe_send_mpacket, .fpe_irq_status = dwmac5_fpe_irq_status, + .fpe_get_add_frag_size = dwmac5_fpe_get_add_frag_size, + .fpe_set_add_frag_size = dwmac5_fpe_set_add_frag_size, .add_hw_vlan_rx_fltr = dwmac4_add_hw_vlan_rx_fltr, .del_hw_vlan_rx_fltr = dwmac4_del_hw_vlan_rx_fltr, .restore_hw_vlan_rx_fltr = dwmac4_restore_hw_vlan_rx_fltr, @@ -1320,6 +1322,8 @@ const struct stmmac_ops dwmac510_ops = { .fpe_configure = dwmac5_fpe_configure, .fpe_send_mpacket = dwmac5_fpe_send_mpacket, .fpe_irq_status = dwmac5_fpe_irq_status, + .fpe_get_add_frag_size = dwmac5_fpe_get_add_frag_size, + .fpe_set_add_frag_size = dwmac5_fpe_set_add_frag_size, .add_hw_vlan_rx_fltr = dwmac4_add_hw_vlan_rx_fltr, .del_hw_vlan_rx_fltr = dwmac4_del_hw_vlan_rx_fltr, .restore_hw_vlan_rx_fltr = dwmac4_restore_hw_vlan_rx_fltr, diff --git a/drivers/net/ethernet/stmicro/stmmac/dwmac5.c b/drivers/net/ethernet/stmicro/stmmac/dwmac5.c index e02cebc3f1b7..5d132bada3fe 100644 --- a/drivers/net/ethernet/stmicro/stmmac/dwmac5.c +++ b/drivers/net/ethernet/stmicro/stmmac/dwmac5.c @@ -638,3 +638,20 @@ void dwmac5_fpe_send_mpacket(void __iomem *ioaddr, struct stmmac_fpe_cfg *cfg, writel(value, ioaddr + MAC_FPE_CTRL_STS); } + +int dwmac5_fpe_get_add_frag_size(void __iomem *ioaddr) +{ + return FIELD_GET(AFSZ, readl(ioaddr + MTL_FPE_CTRL_STS)); +} + +void dwmac5_fpe_set_add_frag_size(void __iomem *ioaddr, u32 add_frag_size) +{ + u32 value; + + value = readl(ioaddr + MTL_FPE_CTRL_STS); + + value &= ~AFSZ; + value |= FIELD_PREP(AFSZ, add_frag_size); + + writel(value, ioaddr + MTL_FPE_CTRL_STS); +} diff --git a/drivers/net/ethernet/stmicro/stmmac/dwmac5.h b/drivers/net/ethernet/stmicro/stmmac/dwmac5.h index bf33a51d229e..6b1c9d2da308 100644 --- a/drivers/net/ethernet/stmicro/stmmac/dwmac5.h +++ b/drivers/net/ethernet/stmicro/stmmac/dwmac5.h @@ -39,6 +39,9 @@ #define MAC_PPSx_INTERVAL(x) (0x00000b88 + ((x) * 0x10)) #define MAC_PPSx_WIDTH(x) (0x00000b8c + ((x) * 0x10)) +#define MTL_FPE_CTRL_STS 0x00000c90 +#define AFSZ GENMASK(1, 0) + #define MTL_RXP_CONTROL_STATUS 0x00000ca0 #define RXPI BIT(31) #define NPE GENMASK(23, 16) @@ -109,5 +112,7 @@ void dwmac5_fpe_send_mpacket(void __iomem *ioaddr, struct stmmac_fpe_cfg *cfg, enum stmmac_mpacket_type type); int dwmac5_fpe_irq_status(void __iomem *ioaddr, struct net_device *dev); +int dwmac5_fpe_get_add_frag_size(void __iomem *ioaddr); +void dwmac5_fpe_set_add_frag_size(void __iomem *ioaddr, u32 add_frag_size); #endif /* __DWMAC5_H__ */ diff --git a/drivers/net/ethernet/stmicro/stmmac/hwif.h b/drivers/net/ethernet/stmicro/stmmac/hwif.h index e53c32362774..f868ffc3e64f 100644 --- a/drivers/net/ethernet/stmicro/stmmac/hwif.h +++ b/drivers/net/ethernet/stmicro/stmmac/hwif.h @@ -425,6 +425,8 @@ struct stmmac_ops { struct stmmac_fpe_cfg *cfg, enum stmmac_mpacket_type type); int (*fpe_irq_status)(void __iomem *ioaddr, struct net_device *dev); + int (*fpe_get_add_frag_size)(void __iomem *ioaddr); + void (*fpe_set_add_frag_size)(void __iomem *ioaddr, u32 add_frag_size); }; #define stmmac_core_init(__priv, __args...) \ @@ -529,6 +531,10 @@ struct stmmac_ops { stmmac_do_void_callback(__priv, mac, fpe_send_mpacket, __args) #define stmmac_fpe_irq_status(__priv, __args...) \ stmmac_do_callback(__priv, mac, fpe_irq_status, __args) +#define stmmac_fpe_get_add_frag_size(__priv, __args...) \ + stmmac_do_callback(__priv, mac, fpe_get_add_frag_size, __args) +#define stmmac_fpe_set_add_frag_size(__priv, __args...) \ + stmmac_do_void_callback(__priv, mac, fpe_set_add_frag_size, __args) /* PTP and HW Timer helpers */ struct stmmac_hwtimestamp { diff --git a/drivers/net/ethernet/stmicro/stmmac/stmmac.h b/drivers/net/ethernet/stmicro/stmmac/stmmac.h index b23b920eedb1..5228493bc68c 100644 --- a/drivers/net/ethernet/stmicro/stmmac/stmmac.h +++ b/drivers/net/ethernet/stmicro/stmmac/stmmac.h @@ -345,6 +345,9 @@ struct stmmac_priv { struct work_struct fpe_task; char wq_name[IFNAMSIZ + 4]; + /* Serialize access to MAC Merge state between ethtool requests */ + struct mutex mm_lock; + /* TC Handling */ unsigned int tc_entries_max; unsigned int tc_off_max; diff --git a/drivers/net/ethernet/stmicro/stmmac/stmmac_ethtool.c b/drivers/net/ethernet/stmicro/stmmac/stmmac_ethtool.c index 7008219fd88d..ca85e8694285 100644 --- a/drivers/net/ethernet/stmicro/stmmac/stmmac_ethtool.c +++ b/drivers/net/ethernet/stmicro/stmmac/stmmac_ethtool.c @@ -19,6 +19,7 @@ #include "stmmac.h" #include "dwmac_dma.h" #include "dwxgmac2.h" +#include "dwmac5.h" #define REG_SPACE_SIZE 0x1060 #define GMAC4_REG_SPACE_SIZE 0x116C @@ -1270,6 +1271,113 @@ static int stmmac_set_tunable(struct net_device *dev, return ret; } +static int stmmac_get_mm(struct net_device *ndev, + struct ethtool_mm_state *state) +{ + struct stmmac_priv *priv = netdev_priv(ndev); + enum stmmac_fpe_state lo_state = priv->plat->fpe_cfg->lo_fpe_state; + u32 add_frag_size; + + if (!priv->dma_cap.fpesel) + return -EOPNOTSUPP; + + mutex_lock(&priv->mm_lock); + + /* If FPE is supported by hardware, preemptible MAC is always enabled */ + state->pmac_enabled = true; + + state->verify_time = priv->plat->fpe_cfg->verify_time; + + /* 802.3-2018 clause 30.14.1.6, says that the aMACMergeVerifyTime + * variable has a range between 1 and 128 ms inclusive. Limit to that. + */ + state->max_verify_time = 128; + + if (lo_state == FPE_STATE_CAPABLE) + state->verify_status = ETHTOOL_MM_VERIFY_STATUS_VERIFYING; + else if (lo_state == FPE_STATE_ENTERING_ON || lo_state == FPE_STATE_ON) + state->verify_status = ETHTOOL_MM_VERIFY_STATUS_SUCCEEDED; + else if (lo_state == FPE_STATE_OFF) + state->verify_status = ETHTOOL_MM_VERIFY_STATUS_DISABLED; + else + state->verify_status = ETHTOOL_MM_VERIFY_STATUS_UNKNOWN; + + /* Cannot read MAC_FPE_CTRL_STS register here, or FPE interrupt events + * can lose. + * + * See commit 37e4b8df27bc ("net: stmmac: fix FPE events losing") + */ + state->tx_enabled = !!(priv->plat->fpe_cfg->fpe_csr == EFPE); + + /* FPE active if common tx_enabled and verification success or disabled (forced) */ + state->tx_active = state->tx_enabled && + (state->verify_status == ETHTOOL_MM_VERIFY_STATUS_SUCCEEDED || + state->verify_status == ETHTOOL_MM_VERIFY_STATUS_DISABLED); + + state->verify_enabled = priv->plat->fpe_cfg->hs_enable; + + add_frag_size = stmmac_fpe_get_add_frag_size(priv, priv->ioaddr); + state->tx_min_frag_size = ethtool_mm_frag_size_add_to_min(add_frag_size); + + state->rx_min_frag_size = ETH_ZLEN; + + mutex_unlock(&priv->mm_lock); + + return 0; +} + +static int stmmac_set_mm(struct net_device *ndev, struct ethtool_mm_cfg *cfg, + struct netlink_ext_ack *extack) +{ + struct stmmac_priv *priv = netdev_priv(ndev); + u32 add_frag_size; + int err; + + if (!priv->dma_cap.fpesel) + return -EOPNOTSUPP; + + err = ethtool_mm_frag_size_min_to_add(cfg->tx_min_frag_size, + &add_frag_size, extack); + if (err) + return err; + + mutex_lock(&priv->mm_lock); + + priv->plat->fpe_cfg->verify_time = cfg->verify_time; + + stmmac_fpe_configure(priv, priv->ioaddr, priv->plat->fpe_cfg, + priv->plat->tx_queues_to_use, + priv->plat->rx_queues_to_use, + cfg->tx_enabled); + + stmmac_fpe_set_add_frag_size(priv, priv->ioaddr, add_frag_size); + + stmmac_fpe_handshake(priv, cfg->verify_enabled); + + mutex_unlock(&priv->mm_lock); + + return 0; +} + +static void stmmac_get_mm_stats(struct net_device *ndev, + struct ethtool_mm_stats *s) +{ + struct stmmac_priv *priv = netdev_priv(ndev); + struct stmmac_counters *mmc = &priv->mmc; + + if (!priv->dma_cap.rmon) + return; + + stmmac_mmc_read(priv, priv->mmcaddr, mmc); + + s->MACMergeFrameAssErrorCount = mmc->mmc_rx_packet_assembly_err_cntr; + s->MACMergeFrameSmdErrorCount = mmc->mmc_rx_packet_smd_err_cntr; + s->MACMergeFrameAssOkCount = mmc->mmc_rx_packet_assembly_ok_cntr; + s->MACMergeFragCountRx = mmc->mmc_rx_fpe_fragment_cntr; + s->MACMergeFragCountTx = mmc->mmc_tx_fpe_fragment_cntr; + s->MACMergeHoldCount = mmc->mmc_tx_hold_req_cntr; +} + static const struct ethtool_ops stmmac_ethtool_ops = { .supported_coalesce_params = ETHTOOL_COALESCE_USECS | ETHTOOL_COALESCE_MAX_FRAMES, @@ -1309,6 +1417,9 @@ static const struct ethtool_ops stmmac_ethtool_ops = { .set_tunable = stmmac_set_tunable, .get_link_ksettings = stmmac_ethtool_get_link_ksettings, .set_link_ksettings = stmmac_ethtool_set_link_ksettings, + .get_mm = stmmac_get_mm, + .set_mm = stmmac_set_mm, + .get_mm_stats = stmmac_get_mm_stats, }; void stmmac_set_ethtool_ops(struct net_device *netdev) diff --git a/drivers/net/ethernet/stmicro/stmmac/stmmac_main.c b/drivers/net/ethernet/stmicro/stmmac/stmmac_main.c index 12689774d755..9b1cf81c50ea 100644 --- a/drivers/net/ethernet/stmicro/stmmac/stmmac_main.c +++ b/drivers/net/ethernet/stmicro/stmmac/stmmac_main.c @@ -7384,7 +7384,6 @@ static void stmmac_fpe_lp_task(struct work_struct *work) enum stmmac_fpe_state *lo_state = &fpe_cfg->lo_fpe_state; enum stmmac_fpe_state *lp_state = &fpe_cfg->lp_fpe_state; bool *hs_enable = &fpe_cfg->hs_enable; - bool *enable = &fpe_cfg->enable; int retries = 20; while (retries-- > 0) { @@ -7394,11 +7393,6 @@ static void stmmac_fpe_lp_task(struct work_struct *work) if (*lo_state == FPE_STATE_ENTERING_ON && *lp_state == FPE_STATE_ENTERING_ON) { - stmmac_fpe_configure(priv, priv->ioaddr, - fpe_cfg, - priv->plat->tx_queues_to_use, - priv->plat->rx_queues_to_use, - *enable); netdev_info(priv->dev, "configured FPE\n"); @@ -7418,7 +7412,7 @@ static void stmmac_fpe_lp_task(struct work_struct *work) MPACKET_VERIFY); } /* Sleep then retry */ - msleep(500); + msleep(fpe_cfg->verify_time); } clear_bit(__FPE_TASK_SCHED, &priv->fpe_task_state); @@ -7720,6 +7714,7 @@ int stmmac_dvr_probe(struct device *device, stmmac_napi_add(ndev); mutex_init(&priv->lock); + mutex_init(&priv->mm_lock); /* If a specific clk_csr value is passed from the platform * this means that the CSR Clock Range selection cannot be diff --git a/include/linux/stmmac.h b/include/linux/stmmac.h index 84e13bd5df28..707a6916e51a 100644 --- a/include/linux/stmmac.h +++ b/include/linux/stmmac.h @@ -162,6 +162,7 @@ struct stmmac_fpe_cfg { enum stmmac_fpe_state lp_fpe_state; /* Link Partner FPE state */ enum stmmac_fpe_state lo_fpe_state; /* Local station FPE state */ u32 fpe_csr; /* MAC_FPE_CTRL_STS reg cache */ + u32 verify_time; /* see struct ethtool_mm_state */ }; struct stmmac_safety_feature_cfg {