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| author | Jakub Kicinski <kuba@kernel.org> | 2025-04-23 18:31:55 -0700 |
|---|---|---|
| committer | Jakub Kicinski <kuba@kernel.org> | 2025-04-23 18:31:55 -0700 |
| commit | 3fec58f5a455411393f9f72314a6cb6327a26bd1 (patch) | |
| tree | 762ed6de27b4edb122b01bb0cd2d41ab48514869 /net | |
| parent | a484fe88062d08ba71ce84e2718ca85730ec6a10 (diff) | |
| parent | f05ce73cc3b2bbf8cd03d35337d3b380692840fb (diff) | |
| download | ath-3fec58f5a455411393f9f72314a6cb6327a26bd1.tar.gz | |
Merge branch '1GbE' of git://git.kernel.org/pub/scm/linux/kernel/git/tnguy/next-queue
Tony Nguyen says:
====================
igc: Add support for Frame Preemption
Faizal Rahim says:
Introduce support for the FPE feature in the IGC driver.
The patches aligns with the upstream FPE API:
https://patchwork.kernel.org/project/netdevbpf/cover/20230220122343.1156614-1-vladimir.oltean@nxp.com/
https://patchwork.kernel.org/project/netdevbpf/cover/20230119122705.73054-1-vladimir.oltean@nxp.com/
It builds upon earlier work:
https://patchwork.kernel.org/project/netdevbpf/cover/20220520011538.1098888-1-vinicius.gomes@intel.com/
The patch series adds the following functionalities to the IGC driver:
a) Configure FPE using `ethtool --set-mm`.
b) Display FPE settings via `ethtool --show-mm`.
c) View FPE statistics using `ethtool --include-statistics --show-mm'.
e) Block setting preemptible tc in taprio since it is not supported yet.
Existing code already blocks it in mqprio.
Tested:
Enabled CONFIG_PROVE_LOCKING, CONFIG_DEBUG_ATOMIC_SLEEP, CONFIG_DMA_API_DEBUG, and CONFIG_KASAN
1) selftests
2) netdev down/up cycles
3) suspend/resume cycles
4) fpe verification
No bugs or unusual dmesg logs were observed.
Ran 1), 2) and 3) with and without the patch series, compared dmesg and selftest logs - no differences found.
* '1GbE' of git://git.kernel.org/pub/scm/linux/kernel/git/tnguy/next-queue:
igc: add support to get frame preemption statistics via ethtool
igc: add support to get MAC Merge data via ethtool
igc: block setting preemptible traffic class in taprio
igc: add support to set tx-min-frag-size
igc: add support for frame preemption verification
igc: set the RX packet buffer size for TSN mode
igc: use FIELD_PREP and GENMASK for existing RX packet buffer size
igc: optimize TX packet buffer utilization for TSN mode
igc: use FIELD_PREP and GENMASK for existing TX packet buffer size
igc: rename I225_RXPBSIZE_DEFAULT and I225_TXPBSIZE_DEFAULT
igc: rename xdp_get_tx_ring() for non-xdp usage
net: ethtool: mm: reset verification status when link is down
net: ethtool: mm: extract stmmac verification logic into common library
net: stmmac: move frag_size handling out of spin_lock
====================
Link: https://patch.msgid.link/20250418163822.3519810-1-anthony.l.nguyen@intel.com
Signed-off-by: Jakub Kicinski <kuba@kernel.org>
Diffstat (limited to 'net')
| -rw-r--r-- | net/ethtool/mm.c | 279 |
1 files changed, 278 insertions, 1 deletions
diff --git a/net/ethtool/mm.c b/net/ethtool/mm.c index 2816bb23c3ad9..ad9b400340033 100644 --- a/net/ethtool/mm.c +++ b/net/ethtool/mm.c @@ -1,6 +1,7 @@ // SPDX-License-Identifier: GPL-2.0-only /* - * Copyright 2022-2023 NXP + * Copyright 2022-2025 NXP + * Copyright 2024 Furong Xu <0x1207@gmail.com> */ #include "common.h" #include "netlink.h" @@ -282,3 +283,279 @@ bool ethtool_dev_mm_supported(struct net_device *dev) return supported; } EXPORT_SYMBOL_GPL(ethtool_dev_mm_supported); + +static void ethtool_mmsv_configure_tx(struct ethtool_mmsv *mmsv, + bool tx_active) +{ + if (mmsv->ops->configure_tx) + mmsv->ops->configure_tx(mmsv, tx_active); +} + +static void ethtool_mmsv_configure_pmac(struct ethtool_mmsv *mmsv, + bool pmac_enabled) +{ + if (mmsv->ops->configure_pmac) + mmsv->ops->configure_pmac(mmsv, pmac_enabled); +} + +static void ethtool_mmsv_send_mpacket(struct ethtool_mmsv *mmsv, + enum ethtool_mpacket mpacket) +{ + if (mmsv->ops->send_mpacket) + mmsv->ops->send_mpacket(mmsv, mpacket); +} + +/** + * ethtool_mmsv_verify_timer - Timer for MAC Merge verification + * @t: timer_list struct containing private info + * + * Verify the MAC Merge capability in the local TX direction, by + * transmitting Verify mPackets up to 3 times. Wait until link + * partner responds with a Response mPacket, otherwise fail. + */ +static void ethtool_mmsv_verify_timer(struct timer_list *t) +{ + struct ethtool_mmsv *mmsv = from_timer(mmsv, t, verify_timer); + unsigned long flags; + bool rearm = false; + + spin_lock_irqsave(&mmsv->lock, flags); + + switch (mmsv->status) { + case ETHTOOL_MM_VERIFY_STATUS_INITIAL: + case ETHTOOL_MM_VERIFY_STATUS_VERIFYING: + if (mmsv->verify_retries != 0) { + ethtool_mmsv_send_mpacket(mmsv, ETHTOOL_MPACKET_VERIFY); + rearm = true; + } else { + mmsv->status = ETHTOOL_MM_VERIFY_STATUS_FAILED; + } + + mmsv->verify_retries--; + break; + + case ETHTOOL_MM_VERIFY_STATUS_SUCCEEDED: + ethtool_mmsv_configure_tx(mmsv, true); + break; + + default: + break; + } + + if (rearm) { + mod_timer(&mmsv->verify_timer, + jiffies + msecs_to_jiffies(mmsv->verify_time)); + } + + spin_unlock_irqrestore(&mmsv->lock, flags); +} + +static void ethtool_mmsv_verify_timer_arm(struct ethtool_mmsv *mmsv) +{ + if (mmsv->pmac_enabled && mmsv->tx_enabled && mmsv->verify_enabled && + mmsv->status != ETHTOOL_MM_VERIFY_STATUS_FAILED && + mmsv->status != ETHTOOL_MM_VERIFY_STATUS_SUCCEEDED) { + timer_setup(&mmsv->verify_timer, ethtool_mmsv_verify_timer, 0); + mod_timer(&mmsv->verify_timer, jiffies); + } +} + +static void ethtool_mmsv_apply(struct ethtool_mmsv *mmsv) +{ + /* If verification is disabled, configure FPE right away. + * Otherwise let the timer code do it. + */ + if (!mmsv->verify_enabled) { + ethtool_mmsv_configure_pmac(mmsv, mmsv->pmac_enabled); + ethtool_mmsv_configure_tx(mmsv, mmsv->tx_enabled); + } else { + mmsv->status = ETHTOOL_MM_VERIFY_STATUS_INITIAL; + mmsv->verify_retries = ETHTOOL_MM_MAX_VERIFY_RETRIES; + + if (netif_running(mmsv->dev)) + ethtool_mmsv_verify_timer_arm(mmsv); + } +} + +/** + * ethtool_mmsv_stop() - Stop MAC Merge Software Verification + * @mmsv: MAC Merge Software Verification state + * + * Drivers should call this method in a state where the hardware is + * about to lose state, like ndo_stop() or suspend(), and turning off + * MAC Merge features would be superfluous. Otherwise, prefer + * ethtool_mmsv_link_state_handle() with up=false. + */ +void ethtool_mmsv_stop(struct ethtool_mmsv *mmsv) +{ + timer_shutdown_sync(&mmsv->verify_timer); +} +EXPORT_SYMBOL_GPL(ethtool_mmsv_stop); + +/** + * ethtool_mmsv_link_state_handle() - Inform MAC Merge Software Verification + * of link state changes + * @mmsv: MAC Merge Software Verification state + * @up: True if device carrier is up and able to pass verification packets + * + * Calling context is expected to be from a task, interrupts enabled. + */ +void ethtool_mmsv_link_state_handle(struct ethtool_mmsv *mmsv, bool up) +{ + unsigned long flags; + + ethtool_mmsv_stop(mmsv); + + spin_lock_irqsave(&mmsv->lock, flags); + + if (up && mmsv->pmac_enabled) { + /* VERIFY process requires pMAC enabled when NIC comes up */ + ethtool_mmsv_configure_pmac(mmsv, true); + + /* New link => maybe new partner => new verification process */ + ethtool_mmsv_apply(mmsv); + } else { + /* Reset the reported verification state while the link is down */ + if (mmsv->verify_enabled) + mmsv->status = ETHTOOL_MM_VERIFY_STATUS_INITIAL; + + /* No link or pMAC not enabled */ + ethtool_mmsv_configure_pmac(mmsv, false); + ethtool_mmsv_configure_tx(mmsv, false); + } + + spin_unlock_irqrestore(&mmsv->lock, flags); +} +EXPORT_SYMBOL_GPL(ethtool_mmsv_link_state_handle); + +/** + * ethtool_mmsv_event_handle() - Inform MAC Merge Software Verification + * of interrupt-based events + * @mmsv: MAC Merge Software Verification state + * @event: Event which took place (packet transmission or reception) + * + * Calling context expects to have interrupts disabled. + */ +void ethtool_mmsv_event_handle(struct ethtool_mmsv *mmsv, + enum ethtool_mmsv_event event) +{ + /* This is interrupt context, just spin_lock() */ + spin_lock(&mmsv->lock); + + if (!mmsv->pmac_enabled) + goto unlock; + + switch (event) { + case ETHTOOL_MMSV_LP_SENT_VERIFY_MPACKET: + /* Link partner has sent verify mPacket */ + ethtool_mmsv_send_mpacket(mmsv, ETHTOOL_MPACKET_RESPONSE); + break; + case ETHTOOL_MMSV_LD_SENT_VERIFY_MPACKET: + /* Local device has sent verify mPacket */ + if (mmsv->status != ETHTOOL_MM_VERIFY_STATUS_SUCCEEDED) + mmsv->status = ETHTOOL_MM_VERIFY_STATUS_VERIFYING; + break; + case ETHTOOL_MMSV_LP_SENT_RESPONSE_MPACKET: + /* Link partner has sent response mPacket */ + if (mmsv->status == ETHTOOL_MM_VERIFY_STATUS_VERIFYING) + mmsv->status = ETHTOOL_MM_VERIFY_STATUS_SUCCEEDED; + break; + } + +unlock: + spin_unlock(&mmsv->lock); +} +EXPORT_SYMBOL_GPL(ethtool_mmsv_event_handle); + +static bool ethtool_mmsv_is_tx_active(struct ethtool_mmsv *mmsv) +{ + /* TX is active if administratively enabled, and verification either + * succeeded, or was administratively disabled. + */ + return mmsv->tx_enabled && + (mmsv->status == ETHTOOL_MM_VERIFY_STATUS_SUCCEEDED || + mmsv->status == ETHTOOL_MM_VERIFY_STATUS_DISABLED); +} + +/** + * ethtool_mmsv_get_mm() - get_mm() hook for MAC Merge Software Verification + * @mmsv: MAC Merge Software Verification state + * @state: see struct ethtool_mm_state + * + * Drivers are expected to call this from their ethtool_ops :: get_mm() + * method. + */ +void ethtool_mmsv_get_mm(struct ethtool_mmsv *mmsv, + struct ethtool_mm_state *state) +{ + unsigned long flags; + + spin_lock_irqsave(&mmsv->lock, flags); + + state->max_verify_time = ETHTOOL_MM_MAX_VERIFY_TIME_MS; + state->verify_enabled = mmsv->verify_enabled; + state->pmac_enabled = mmsv->pmac_enabled; + state->verify_time = mmsv->verify_time; + state->tx_enabled = mmsv->tx_enabled; + state->verify_status = mmsv->status; + state->tx_active = ethtool_mmsv_is_tx_active(mmsv); + + spin_unlock_irqrestore(&mmsv->lock, flags); +} +EXPORT_SYMBOL_GPL(ethtool_mmsv_get_mm); + +/** + * ethtool_mmsv_set_mm() - set_mm() hook for MAC Merge Software Verification + * @mmsv: MAC Merge Software Verification state + * @cfg: see struct ethtool_mm_cfg + * + * Drivers are expected to call this from their ethtool_ops :: set_mm() + * method. + */ +void ethtool_mmsv_set_mm(struct ethtool_mmsv *mmsv, struct ethtool_mm_cfg *cfg) +{ + unsigned long flags; + + /* Wait for the verification that's currently in progress to finish */ + ethtool_mmsv_stop(mmsv); + + spin_lock_irqsave(&mmsv->lock, flags); + + mmsv->verify_enabled = cfg->verify_enabled; + mmsv->pmac_enabled = cfg->pmac_enabled; + mmsv->verify_time = cfg->verify_time; + mmsv->tx_enabled = cfg->tx_enabled; + + if (!cfg->verify_enabled) + mmsv->status = ETHTOOL_MM_VERIFY_STATUS_DISABLED; + + ethtool_mmsv_apply(mmsv); + + spin_unlock_irqrestore(&mmsv->lock, flags); +} +EXPORT_SYMBOL_GPL(ethtool_mmsv_set_mm); + +/** + * ethtool_mmsv_init() - Initialize MAC Merge Software Verification state + * @mmsv: MAC Merge Software Verification state + * @dev: Pointer to network interface + * @ops: Methods for implementing the generic functionality + * + * The MAC Merge Software Verification is a timer- and event-based state + * machine intended for network interfaces which lack a hardware-based + * TX verification process (as per IEEE 802.3 clause 99.4.3). The timer + * is managed by the core code, whereas events are supplied by the + * driver explicitly calling one of the other API functions. + */ +void ethtool_mmsv_init(struct ethtool_mmsv *mmsv, struct net_device *dev, + const struct ethtool_mmsv_ops *ops) +{ + mmsv->ops = ops; + mmsv->dev = dev; + mmsv->verify_retries = ETHTOOL_MM_MAX_VERIFY_RETRIES; + mmsv->verify_time = ETHTOOL_MM_MAX_VERIFY_TIME_MS; + mmsv->status = ETHTOOL_MM_VERIFY_STATUS_DISABLED; + timer_setup(&mmsv->verify_timer, ethtool_mmsv_verify_timer, 0); + spin_lock_init(&mmsv->lock); +} +EXPORT_SYMBOL_GPL(ethtool_mmsv_init); |