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Message-Id: <d20b291dc4dd5030adefbabef7dda1bf2206a15f.1722421644.git.0x1207@gmail.com>
Date: Wed, 31 Jul 2024 18:43:12 +0800
From: Furong Xu <0x1207@...il.com>
To: Andrew Lunn <andrew@...n.ch>,
Vladimir Oltean <olteanv@...il.com>,
"David S. Miller" <davem@...emloft.net>,
Alexandre Torgue <alexandre.torgue@...s.st.com>,
Jose Abreu <joabreu@...opsys.com>,
Eric Dumazet <edumazet@...gle.com>,
Jakub Kicinski <kuba@...nel.org>,
Paolo Abeni <pabeni@...hat.com>,
Maxime Coquelin <mcoquelin.stm32@...il.com>,
Joao Pinto <jpinto@...opsys.com>
Cc: netdev@...r.kernel.org,
linux-stm32@...md-mailman.stormreply.com,
linux-arm-kernel@...ts.infradead.org,
linux-kernel@...r.kernel.org,
xfr@...look.com,
rock.xu@....com,
Furong Xu <0x1207@...il.com>
Subject: [PATCH net-next v1 1/5] net: stmmac: configure FPE via ethtool-mm
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@...il.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 {
--
2.34.1
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