From 5b7c4cabbb65f5c469464da6c5f614cbd7f730f2 Mon Sep 17 00:00:00 2001 From: Linus Torvalds Date: Tue, 21 Feb 2023 18:24:12 -0800 Subject: Merge tag 'net-next-6.3' of git://git.kernel.org/pub/scm/linux/kernel/git/netdev/net-next Pull networking updates from Jakub Kicinski: "Core: - Add dedicated kmem_cache for typical/small skb->head, avoid having to access struct page at kfree time, and improve memory use. - Introduce sysctl to set default RPS configuration for new netdevs. - Define Netlink protocol specification format which can be used to describe messages used by each family and auto-generate parsers. Add tools for generating kernel data structures and uAPI headers. - Expose all net/core sysctls inside netns. - Remove 4s sleep in netpoll if carrier is instantly detected on boot. - Add configurable limit of MDB entries per port, and port-vlan. - Continue populating drop reasons throughout the stack. - Retire a handful of legacy Qdiscs and classifiers. Protocols: - Support IPv4 big TCP (TSO frames larger than 64kB). - Add IP_LOCAL_PORT_RANGE socket option, to control local port range on socket by socket basis. - Track and report in procfs number of MPTCP sockets used. - Support mixing IPv4 and IPv6 flows in the in-kernel MPTCP path manager. - IPv6: don't check net.ipv6.route.max_size and rely on garbage collection to free memory (similarly to IPv4). - Support Penultimate Segment Pop (PSP) flavor in SRv6 (RFC8986). - ICMP: add per-rate limit counters. - Add support for user scanning requests in ieee802154. - Remove static WEP support. - Support minimal Wi-Fi 7 Extremely High Throughput (EHT) rate reporting. - WiFi 7 EHT channel puncturing support (client & AP). BPF: - Add a rbtree data structure following the "next-gen data structure" precedent set by recently added linked list, that is, by using kfunc + kptr instead of adding a new BPF map type. - Expose XDP hints via kfuncs with initial support for RX hash and timestamp metadata. - Add BPF_F_NO_TUNNEL_KEY extension to bpf_skb_set_tunnel_key to better support decap on GRE tunnel devices not operating in collect metadata. - Improve x86 JIT's codegen for PROBE_MEM runtime error checks. - Remove the need for trace_printk_lock for bpf_trace_printk and bpf_trace_vprintk helpers. - Extend libbpf's bpf_tracing.h support for tracing arguments of kprobes/uprobes and syscall as a special case. - Significantly reduce the search time for module symbols by livepatch and BPF. - Enable cpumasks to be used as kptrs, which is useful for tracing programs tracking which tasks end up running on which CPUs in different time intervals. - Add support for BPF trampoline on s390x and riscv64. - Add capability to export the XDP features supported by the NIC. - Add __bpf_kfunc tag for marking kernel functions as kfuncs. - Add cgroup.memory=nobpf kernel parameter option to disable BPF memory accounting for container environments. Netfilter: - Remove the CLUSTERIP target. It has been marked as obsolete for years, and we still have WARN splats wrt races of the out-of-band /proc interface installed by this target. - Add 'destroy' commands to nf_tables. They are identical to the existing 'delete' commands, but do not return an error if the referenced object (set, chain, rule...) did not exist. Driver API: - Improve cpumask_local_spread() locality to help NICs set the right IRQ affinity on AMD platforms. - Separate C22 and C45 MDIO bus transactions more clearly. - Introduce new DCB table to control DSCP rewrite on egress. - Support configuration of Physical Layer Collision Avoidance (PLCA) Reconciliation Sublayer (RS) (802.3cg-2019). Modern version of shared medium Ethernet. - Support for MAC Merge layer (IEEE 802.3-2018 clause 99). Allowing preemption of low priority frames by high priority frames. - Add support for controlling MACSec offload using netlink SET. - Rework devlink instance refcounts to allow registration and de-registration under the instance lock. Split the code into multiple files, drop some of the unnecessarily granular locks and factor out common parts of netlink operation handling. - Add TX frame aggregation parameters (for USB drivers). - Add a new attr TCA_EXT_WARN_MSG to report TC (offload) warning messages with notifications for debug. - Allow offloading of UDP NEW connections via act_ct. - Add support for per action HW stats in TC. - Support hardware miss to TC action (continue processing in SW from a specific point in the action chain). - Warn if old Wireless Extension user space interface is used with modern cfg80211/mac80211 drivers. Do not support Wireless Extensions for Wi-Fi 7 devices at all. Everyone should switch to using nl80211 interface instead. - Improve the CAN bit timing configuration. Use extack to return error messages directly to user space, update the SJW handling, including the definition of a new default value that will benefit CAN-FD controllers, by increasing their oscillator tolerance. New hardware / drivers: - Ethernet: - nVidia BlueField-3 support (control traffic driver) - Ethernet support for imx93 SoCs - Motorcomm yt8531 gigabit Ethernet PHY - onsemi NCN26000 10BASE-T1S PHY (with support for PLCA) - Microchip LAN8841 PHY (incl. cable diagnostics and PTP) - Amlogic gxl MDIO mux - WiFi: - RealTek RTL8188EU (rtl8xxxu) - Qualcomm Wi-Fi 7 devices (ath12k) - CAN: - Renesas R-Car V4H Drivers: - Bluetooth: - Set Per Platform Antenna Gain (PPAG) for Intel controllers. - Ethernet NICs: - Intel (1G, igc): - support TSN / Qbv / packet scheduling features of i226 model - Intel (100G, ice): - use GNSS subsystem instead of TTY - multi-buffer XDP support - extend support for GPIO pins to E823 devices - nVidia/Mellanox: - update the shared buffer configuration on PFC commands - implement PTP adjphase function for HW offset control - TC support for Geneve and GRE with VF tunnel offload - more efficient crypto key management method - multi-port eswitch support - Netronome/Corigine: - add DCB IEEE support - support IPsec offloading for NFP3800 - Freescale/NXP (enetc): - support XDP_REDIRECT for XDP non-linear buffers - improve reconfig, avoid link flap and waiting for idle - support MAC Merge layer - Other NICs: - sfc/ef100: add basic devlink support for ef100 - ionic: rx_push mode operation (writing descriptors via MMIO) - bnxt: use the auxiliary bus abstraction for RDMA - r8169: disable ASPM and reset bus in case of tx timeout - cpsw: support QSGMII mode for J721e CPSW9G - cpts: support pulse-per-second output - ngbe: add an mdio bus driver - usbnet: optimize usbnet_bh() by avoiding unnecessary queuing - r8152: handle devices with FW with NCM support - amd-xgbe: support 10Mbps, 2.5GbE speeds and rx-adaptation - virtio-net: support multi buffer XDP - virtio/vsock: replace virtio_vsock_pkt with sk_buff - tsnep: XDP support - Ethernet high-speed switches: - nVidia/Mellanox (mlxsw): - add support for latency TLV (in FW control messages) - Microchip (sparx5): - separate explicit and implicit traffic forwarding rules, make the implicit rules always active - add support for egress DSCP rewrite - IS0 VCAP support (Ingress Classification) - IS2 VCAP filters (protos, L3 addrs, L4 ports, flags, ToS etc.) - ES2 VCAP support (Egress Access Control) - support for Per-Stream Filtering and Policing (802.1Q, 8.6.5.1) - Ethernet embedded switches: - Marvell (mv88e6xxx): - add MAB (port auth) offload support - enable PTP receive for mv88e6390 - NXP (ocelot): - support MAC Merge layer - support for the the vsc7512 internal copper phys - Microchip: - lan9303: convert to PHYLINK - lan966x: support TC flower filter statistics - lan937x: PTP support for KSZ9563/KSZ8563 and LAN937x - lan937x: support Credit Based Shaper configuration - ksz9477: support Energy Efficient Ethernet - other: - qca8k: convert to regmap read/write API, use bulk operations - rswitch: Improve TX timestamp accuracy - Intel WiFi (iwlwifi): - EHT (Wi-Fi 7) rate reporting - STEP equalizer support: transfer some STEP (connection to radio on platforms with integrated wifi) related parameters from the BIOS to the firmware. - Qualcomm 802.11ax WiFi (ath11k): - IPQ5018 support - Fine Timing Measurement (FTM) responder role support - channel 177 support - MediaTek WiFi (mt76): - per-PHY LED support - mt7996: EHT (Wi-Fi 7) support - Wireless Ethernet Dispatch (WED) reset support - switch to using page pool allocator - RealTek WiFi (rtw89): - support new version of Bluetooth co-existance - Mobile: - rmnet: support TX aggregation" * tag 'net-next-6.3' of git://git.kernel.org/pub/scm/linux/kernel/git/netdev/net-next: (1872 commits) page_pool: add a comment explaining the fragment counter usage net: ethtool: fix __ethtool_dev_mm_supported() implementation ethtool: pse-pd: Fix double word in comments xsk: add linux/vmalloc.h to xsk.c sefltests: netdevsim: wait for devlink instance after netns removal selftest: fib_tests: Always cleanup before exit net/mlx5e: Align IPsec ASO result memory to be as required by hardware net/mlx5e: TC, Set CT miss to the specific ct action instance net/mlx5e: Rename CHAIN_TO_REG to MAPPED_OBJ_TO_REG net/mlx5: Refactor tc miss handling to a single function net/mlx5: Kconfig: Make tc offload depend on tc skb extension net/sched: flower: Support hardware miss to tc action net/sched: flower: Move filter handle initialization earlier net/sched: cls_api: Support hardware miss to tc action net/sched: Rename user cookie and act cookie sfc: fix builds without CONFIG_RTC_LIB sfc: clean up some inconsistent indentings net/mlx4_en: Introduce flexible array to silence overflow warning net: lan966x: Fix possible deadlock inside PTP net/ulp: Remove redundant ->clone() test in inet_clone_ulp(). ... --- drivers/net/ethernet/microchip/sparx5/sparx5_ptp.c | 684 +++++++++++++++++++++ 1 file changed, 684 insertions(+) create mode 100644 drivers/net/ethernet/microchip/sparx5/sparx5_ptp.c (limited to 'drivers/net/ethernet/microchip/sparx5/sparx5_ptp.c') diff --git a/drivers/net/ethernet/microchip/sparx5/sparx5_ptp.c b/drivers/net/ethernet/microchip/sparx5/sparx5_ptp.c new file mode 100644 index 000000000..0edb98cef --- /dev/null +++ b/drivers/net/ethernet/microchip/sparx5/sparx5_ptp.c @@ -0,0 +1,684 @@ +// SPDX-License-Identifier: GPL-2.0+ +/* Microchip Sparx5 Switch driver + * + * Copyright (c) 2021 Microchip Technology Inc. and its subsidiaries. + * + * The Sparx5 Chip Register Model can be browsed at this location: + * https://github.com/microchip-ung/sparx-5_reginfo + */ +#include + +#include "sparx5_main_regs.h" +#include "sparx5_main.h" + +#define SPARX5_MAX_PTP_ID 512 + +#define TOD_ACC_PIN 0x4 + +enum { + PTP_PIN_ACTION_IDLE = 0, + PTP_PIN_ACTION_LOAD, + PTP_PIN_ACTION_SAVE, + PTP_PIN_ACTION_CLOCK, + PTP_PIN_ACTION_DELTA, + PTP_PIN_ACTION_TOD +}; + +static u64 sparx5_ptp_get_1ppm(struct sparx5 *sparx5) +{ + /* Represents 1ppm adjustment in 2^59 format with 1.59687500000(625) + * 1.99609375000(500), 3.99218750000(250) as reference + * The value is calculated as following: + * (1/1000000)/((2^-59)/X) + */ + + u64 res = 0; + + switch (sparx5->coreclock) { + case SPX5_CORE_CLOCK_250MHZ: + res = 2301339409586; + break; + case SPX5_CORE_CLOCK_500MHZ: + res = 1150669704793; + break; + case SPX5_CORE_CLOCK_625MHZ: + res = 920535763834; + break; + default: + WARN(1, "Invalid core clock"); + break; + } + + return res; +} + +static u64 sparx5_ptp_get_nominal_value(struct sparx5 *sparx5) +{ + u64 res = 0; + + switch (sparx5->coreclock) { + case SPX5_CORE_CLOCK_250MHZ: + res = 0x1FF0000000000000; + break; + case SPX5_CORE_CLOCK_500MHZ: + res = 0x0FF8000000000000; + break; + case SPX5_CORE_CLOCK_625MHZ: + res = 0x0CC6666666666666; + break; + default: + WARN(1, "Invalid core clock"); + break; + } + + return res; +} + +int sparx5_ptp_hwtstamp_set(struct sparx5_port *port, struct ifreq *ifr) +{ + struct sparx5 *sparx5 = port->sparx5; + struct hwtstamp_config cfg; + struct sparx5_phc *phc; + + /* For now don't allow to run ptp on ports that are part of a bridge, + * because in case of transparent clock the HW will still forward the + * frames, so there would be duplicate frames + */ + + if (test_bit(port->portno, sparx5->bridge_mask)) + return -EINVAL; + + if (copy_from_user(&cfg, ifr->ifr_data, sizeof(cfg))) + return -EFAULT; + + switch (cfg.tx_type) { + case HWTSTAMP_TX_ON: + port->ptp_cmd = IFH_REW_OP_TWO_STEP_PTP; + break; + case HWTSTAMP_TX_ONESTEP_SYNC: + port->ptp_cmd = IFH_REW_OP_ONE_STEP_PTP; + break; + case HWTSTAMP_TX_OFF: + port->ptp_cmd = IFH_REW_OP_NOOP; + break; + default: + return -ERANGE; + } + + switch (cfg.rx_filter) { + case HWTSTAMP_FILTER_NONE: + break; + case HWTSTAMP_FILTER_ALL: + case HWTSTAMP_FILTER_PTP_V1_L4_EVENT: + case HWTSTAMP_FILTER_PTP_V1_L4_SYNC: + case HWTSTAMP_FILTER_PTP_V1_L4_DELAY_REQ: + case HWTSTAMP_FILTER_PTP_V2_L4_EVENT: + case HWTSTAMP_FILTER_PTP_V2_L4_SYNC: + case HWTSTAMP_FILTER_PTP_V2_L4_DELAY_REQ: + case HWTSTAMP_FILTER_PTP_V2_L2_EVENT: + case HWTSTAMP_FILTER_PTP_V2_L2_SYNC: + case HWTSTAMP_FILTER_PTP_V2_L2_DELAY_REQ: + case HWTSTAMP_FILTER_PTP_V2_EVENT: + case HWTSTAMP_FILTER_PTP_V2_SYNC: + case HWTSTAMP_FILTER_PTP_V2_DELAY_REQ: + case HWTSTAMP_FILTER_NTP_ALL: + cfg.rx_filter = HWTSTAMP_FILTER_ALL; + break; + default: + return -ERANGE; + } + + /* Commit back the result & save it */ + mutex_lock(&sparx5->ptp_lock); + phc = &sparx5->phc[SPARX5_PHC_PORT]; + memcpy(&phc->hwtstamp_config, &cfg, sizeof(cfg)); + mutex_unlock(&sparx5->ptp_lock); + + return copy_to_user(ifr->ifr_data, &cfg, sizeof(cfg)) ? -EFAULT : 0; +} + +int sparx5_ptp_hwtstamp_get(struct sparx5_port *port, struct ifreq *ifr) +{ + struct sparx5 *sparx5 = port->sparx5; + struct sparx5_phc *phc; + + phc = &sparx5->phc[SPARX5_PHC_PORT]; + return copy_to_user(ifr->ifr_data, &phc->hwtstamp_config, + sizeof(phc->hwtstamp_config)) ? -EFAULT : 0; +} + +static void sparx5_ptp_classify(struct sparx5_port *port, struct sk_buff *skb, + u8 *rew_op, u8 *pdu_type, u8 *pdu_w16_offset) +{ + struct ptp_header *header; + u8 msgtype; + int type; + + if (port->ptp_cmd == IFH_REW_OP_NOOP) { + *rew_op = IFH_REW_OP_NOOP; + *pdu_type = IFH_PDU_TYPE_NONE; + *pdu_w16_offset = 0; + return; + } + + type = ptp_classify_raw(skb); + if (type == PTP_CLASS_NONE) { + *rew_op = IFH_REW_OP_NOOP; + *pdu_type = IFH_PDU_TYPE_NONE; + *pdu_w16_offset = 0; + return; + } + + header = ptp_parse_header(skb, type); + if (!header) { + *rew_op = IFH_REW_OP_NOOP; + *pdu_type = IFH_PDU_TYPE_NONE; + *pdu_w16_offset = 0; + return; + } + + *pdu_w16_offset = 7; + if (type & PTP_CLASS_L2) + *pdu_type = IFH_PDU_TYPE_PTP; + if (type & PTP_CLASS_IPV4) + *pdu_type = IFH_PDU_TYPE_IPV4_UDP_PTP; + if (type & PTP_CLASS_IPV6) + *pdu_type = IFH_PDU_TYPE_IPV6_UDP_PTP; + + if (port->ptp_cmd == IFH_REW_OP_TWO_STEP_PTP) { + *rew_op = IFH_REW_OP_TWO_STEP_PTP; + return; + } + + /* If it is sync and run 1 step then set the correct operation, + * otherwise run as 2 step + */ + msgtype = ptp_get_msgtype(header, type); + if ((msgtype & 0xf) == 0) { + *rew_op = IFH_REW_OP_ONE_STEP_PTP; + return; + } + + *rew_op = IFH_REW_OP_TWO_STEP_PTP; +} + +static void sparx5_ptp_txtstamp_old_release(struct sparx5_port *port) +{ + struct sk_buff *skb, *skb_tmp; + unsigned long flags; + + spin_lock_irqsave(&port->tx_skbs.lock, flags); + skb_queue_walk_safe(&port->tx_skbs, skb, skb_tmp) { + if time_after(SPARX5_SKB_CB(skb)->jiffies + SPARX5_PTP_TIMEOUT, + jiffies) + break; + + __skb_unlink(skb, &port->tx_skbs); + dev_kfree_skb_any(skb); + } + spin_unlock_irqrestore(&port->tx_skbs.lock, flags); +} + +int sparx5_ptp_txtstamp_request(struct sparx5_port *port, + struct sk_buff *skb) +{ + struct sparx5 *sparx5 = port->sparx5; + u8 rew_op, pdu_type, pdu_w16_offset; + unsigned long flags; + + sparx5_ptp_classify(port, skb, &rew_op, &pdu_type, &pdu_w16_offset); + SPARX5_SKB_CB(skb)->rew_op = rew_op; + SPARX5_SKB_CB(skb)->pdu_type = pdu_type; + SPARX5_SKB_CB(skb)->pdu_w16_offset = pdu_w16_offset; + + if (rew_op != IFH_REW_OP_TWO_STEP_PTP) + return 0; + + sparx5_ptp_txtstamp_old_release(port); + + spin_lock_irqsave(&sparx5->ptp_ts_id_lock, flags); + if (sparx5->ptp_skbs == SPARX5_MAX_PTP_ID) { + spin_unlock_irqrestore(&sparx5->ptp_ts_id_lock, flags); + return -EBUSY; + } + + skb_shinfo(skb)->tx_flags |= SKBTX_IN_PROGRESS; + + skb_queue_tail(&port->tx_skbs, skb); + SPARX5_SKB_CB(skb)->ts_id = port->ts_id; + SPARX5_SKB_CB(skb)->jiffies = jiffies; + + sparx5->ptp_skbs++; + port->ts_id++; + if (port->ts_id == SPARX5_MAX_PTP_ID) + port->ts_id = 0; + + spin_unlock_irqrestore(&sparx5->ptp_ts_id_lock, flags); + + return 0; +} + +void sparx5_ptp_txtstamp_release(struct sparx5_port *port, + struct sk_buff *skb) +{ + struct sparx5 *sparx5 = port->sparx5; + unsigned long flags; + + spin_lock_irqsave(&sparx5->ptp_ts_id_lock, flags); + port->ts_id--; + sparx5->ptp_skbs--; + skb_unlink(skb, &port->tx_skbs); + spin_unlock_irqrestore(&sparx5->ptp_ts_id_lock, flags); +} + +static void sparx5_get_hwtimestamp(struct sparx5 *sparx5, + struct timespec64 *ts, + u32 nsec) +{ + /* Read current PTP time to get seconds */ + unsigned long flags; + u32 curr_nsec; + + spin_lock_irqsave(&sparx5->ptp_clock_lock, flags); + + spx5_rmw(PTP_PTP_PIN_CFG_PTP_PIN_ACTION_SET(PTP_PIN_ACTION_SAVE) | + PTP_PTP_PIN_CFG_PTP_PIN_DOM_SET(SPARX5_PHC_PORT) | + PTP_PTP_PIN_CFG_PTP_PIN_SYNC_SET(0), + PTP_PTP_PIN_CFG_PTP_PIN_ACTION | + PTP_PTP_PIN_CFG_PTP_PIN_DOM | + PTP_PTP_PIN_CFG_PTP_PIN_SYNC, + sparx5, PTP_PTP_PIN_CFG(TOD_ACC_PIN)); + + ts->tv_sec = spx5_rd(sparx5, PTP_PTP_TOD_SEC_LSB(TOD_ACC_PIN)); + curr_nsec = spx5_rd(sparx5, PTP_PTP_TOD_NSEC(TOD_ACC_PIN)); + + ts->tv_nsec = nsec; + + /* Sec has incremented since the ts was registered */ + if (curr_nsec < nsec) + ts->tv_sec--; + + spin_unlock_irqrestore(&sparx5->ptp_clock_lock, flags); +} + +irqreturn_t sparx5_ptp_irq_handler(int irq, void *args) +{ + int budget = SPARX5_MAX_PTP_ID; + struct sparx5 *sparx5 = args; + + while (budget--) { + struct sk_buff *skb, *skb_tmp, *skb_match = NULL; + struct skb_shared_hwtstamps shhwtstamps; + struct sparx5_port *port; + struct timespec64 ts; + unsigned long flags; + u32 val, id, txport; + u32 delay; + + val = spx5_rd(sparx5, REW_PTP_TWOSTEP_CTRL); + + /* Check if a timestamp can be retrieved */ + if (!(val & REW_PTP_TWOSTEP_CTRL_PTP_VLD)) + break; + + WARN_ON(val & REW_PTP_TWOSTEP_CTRL_PTP_OVFL); + + if (!(val & REW_PTP_TWOSTEP_CTRL_STAMP_TX)) + continue; + + /* Retrieve the ts Tx port */ + txport = REW_PTP_TWOSTEP_CTRL_STAMP_PORT_GET(val); + + /* Retrieve its associated skb */ + port = sparx5->ports[txport]; + + /* Retrieve the delay */ + delay = spx5_rd(sparx5, REW_PTP_TWOSTEP_STAMP); + delay = REW_PTP_TWOSTEP_STAMP_STAMP_NSEC_GET(delay); + + /* Get next timestamp from fifo, which needs to be the + * rx timestamp which represents the id of the frame + */ + spx5_rmw(REW_PTP_TWOSTEP_CTRL_PTP_NXT_SET(1), + REW_PTP_TWOSTEP_CTRL_PTP_NXT, + sparx5, REW_PTP_TWOSTEP_CTRL); + + val = spx5_rd(sparx5, REW_PTP_TWOSTEP_CTRL); + + /* Check if a timestamp can be retried */ + if (!(val & REW_PTP_TWOSTEP_CTRL_PTP_VLD)) + break; + + /* Read RX timestamping to get the ID */ + id = spx5_rd(sparx5, REW_PTP_TWOSTEP_STAMP); + id <<= 8; + id |= spx5_rd(sparx5, REW_PTP_TWOSTEP_STAMP_SUBNS); + + spin_lock_irqsave(&port->tx_skbs.lock, flags); + skb_queue_walk_safe(&port->tx_skbs, skb, skb_tmp) { + if (SPARX5_SKB_CB(skb)->ts_id != id) + continue; + + __skb_unlink(skb, &port->tx_skbs); + skb_match = skb; + break; + } + spin_unlock_irqrestore(&port->tx_skbs.lock, flags); + + /* Next ts */ + spx5_rmw(REW_PTP_TWOSTEP_CTRL_PTP_NXT_SET(1), + REW_PTP_TWOSTEP_CTRL_PTP_NXT, + sparx5, REW_PTP_TWOSTEP_CTRL); + + if (WARN_ON(!skb_match)) + continue; + + spin_lock(&sparx5->ptp_ts_id_lock); + sparx5->ptp_skbs--; + spin_unlock(&sparx5->ptp_ts_id_lock); + + /* Get the h/w timestamp */ + sparx5_get_hwtimestamp(sparx5, &ts, delay); + + /* Set the timestamp into the skb */ + shhwtstamps.hwtstamp = ktime_set(ts.tv_sec, ts.tv_nsec); + skb_tstamp_tx(skb_match, &shhwtstamps); + + dev_kfree_skb_any(skb_match); + } + + return IRQ_HANDLED; +} + +static int sparx5_ptp_adjfine(struct ptp_clock_info *ptp, long scaled_ppm) +{ + struct sparx5_phc *phc = container_of(ptp, struct sparx5_phc, info); + struct sparx5 *sparx5 = phc->sparx5; + unsigned long flags; + bool neg_adj = 0; + u64 tod_inc; + u64 ref; + + if (!scaled_ppm) + return 0; + + if (scaled_ppm < 0) { + neg_adj = 1; + scaled_ppm = -scaled_ppm; + } + + tod_inc = sparx5_ptp_get_nominal_value(sparx5); + + /* The multiplication is split in 2 separate additions because of + * overflow issues. If scaled_ppm with 16bit fractional part was bigger + * than 20ppm then we got overflow. + */ + ref = sparx5_ptp_get_1ppm(sparx5) * (scaled_ppm >> 16); + ref += (sparx5_ptp_get_1ppm(sparx5) * (0xffff & scaled_ppm)) >> 16; + tod_inc = neg_adj ? tod_inc - ref : tod_inc + ref; + + spin_lock_irqsave(&sparx5->ptp_clock_lock, flags); + + spx5_rmw(PTP_PTP_DOM_CFG_PTP_CLKCFG_DIS_SET(1 << BIT(phc->index)), + PTP_PTP_DOM_CFG_PTP_CLKCFG_DIS, + sparx5, PTP_PTP_DOM_CFG); + + spx5_wr((u32)tod_inc & 0xFFFFFFFF, sparx5, + PTP_CLK_PER_CFG(phc->index, 0)); + spx5_wr((u32)(tod_inc >> 32), sparx5, + PTP_CLK_PER_CFG(phc->index, 1)); + + spx5_rmw(PTP_PTP_DOM_CFG_PTP_CLKCFG_DIS_SET(0), + PTP_PTP_DOM_CFG_PTP_CLKCFG_DIS, sparx5, + PTP_PTP_DOM_CFG); + + spin_unlock_irqrestore(&sparx5->ptp_clock_lock, flags); + + return 0; +} + +static int sparx5_ptp_settime64(struct ptp_clock_info *ptp, + const struct timespec64 *ts) +{ + struct sparx5_phc *phc = container_of(ptp, struct sparx5_phc, info); + struct sparx5 *sparx5 = phc->sparx5; + unsigned long flags; + + spin_lock_irqsave(&sparx5->ptp_clock_lock, flags); + + /* Must be in IDLE mode before the time can be loaded */ + spx5_rmw(PTP_PTP_PIN_CFG_PTP_PIN_ACTION_SET(PTP_PIN_ACTION_IDLE) | + PTP_PTP_PIN_CFG_PTP_PIN_DOM_SET(phc->index) | + PTP_PTP_PIN_CFG_PTP_PIN_SYNC_SET(0), + PTP_PTP_PIN_CFG_PTP_PIN_ACTION | + PTP_PTP_PIN_CFG_PTP_PIN_DOM | + PTP_PTP_PIN_CFG_PTP_PIN_SYNC, + sparx5, PTP_PTP_PIN_CFG(TOD_ACC_PIN)); + + /* Set new value */ + spx5_wr(PTP_PTP_TOD_SEC_MSB_PTP_TOD_SEC_MSB_SET(upper_32_bits(ts->tv_sec)), + sparx5, PTP_PTP_TOD_SEC_MSB(TOD_ACC_PIN)); + spx5_wr(lower_32_bits(ts->tv_sec), + sparx5, PTP_PTP_TOD_SEC_LSB(TOD_ACC_PIN)); + spx5_wr(ts->tv_nsec, sparx5, PTP_PTP_TOD_NSEC(TOD_ACC_PIN)); + + /* Apply new values */ + spx5_rmw(PTP_PTP_PIN_CFG_PTP_PIN_ACTION_SET(PTP_PIN_ACTION_LOAD) | + PTP_PTP_PIN_CFG_PTP_PIN_DOM_SET(phc->index) | + PTP_PTP_PIN_CFG_PTP_PIN_SYNC_SET(0), + PTP_PTP_PIN_CFG_PTP_PIN_ACTION | + PTP_PTP_PIN_CFG_PTP_PIN_DOM | + PTP_PTP_PIN_CFG_PTP_PIN_SYNC, + sparx5, PTP_PTP_PIN_CFG(TOD_ACC_PIN)); + + spin_unlock_irqrestore(&sparx5->ptp_clock_lock, flags); + + return 0; +} + +int sparx5_ptp_gettime64(struct ptp_clock_info *ptp, struct timespec64 *ts) +{ + struct sparx5_phc *phc = container_of(ptp, struct sparx5_phc, info); + struct sparx5 *sparx5 = phc->sparx5; + unsigned long flags; + time64_t s; + s64 ns; + + spin_lock_irqsave(&sparx5->ptp_clock_lock, flags); + + spx5_rmw(PTP_PTP_PIN_CFG_PTP_PIN_ACTION_SET(PTP_PIN_ACTION_SAVE) | + PTP_PTP_PIN_CFG_PTP_PIN_DOM_SET(phc->index) | + PTP_PTP_PIN_CFG_PTP_PIN_SYNC_SET(0), + PTP_PTP_PIN_CFG_PTP_PIN_ACTION | + PTP_PTP_PIN_CFG_PTP_PIN_DOM | + PTP_PTP_PIN_CFG_PTP_PIN_SYNC, + sparx5, PTP_PTP_PIN_CFG(TOD_ACC_PIN)); + + s = spx5_rd(sparx5, PTP_PTP_TOD_SEC_MSB(TOD_ACC_PIN)); + s <<= 32; + s |= spx5_rd(sparx5, PTP_PTP_TOD_SEC_LSB(TOD_ACC_PIN)); + ns = spx5_rd(sparx5, PTP_PTP_TOD_NSEC(TOD_ACC_PIN)); + ns &= PTP_PTP_TOD_NSEC_PTP_TOD_NSEC; + + spin_unlock_irqrestore(&sparx5->ptp_clock_lock, flags); + + /* Deal with negative values */ + if ((ns & 0xFFFFFFF0) == 0x3FFFFFF0) { + s--; + ns &= 0xf; + ns += 999999984; + } + + set_normalized_timespec64(ts, s, ns); + return 0; +} + +static int sparx5_ptp_adjtime(struct ptp_clock_info *ptp, s64 delta) +{ + struct sparx5_phc *phc = container_of(ptp, struct sparx5_phc, info); + struct sparx5 *sparx5 = phc->sparx5; + + if (delta > -(NSEC_PER_SEC / 2) && delta < (NSEC_PER_SEC / 2)) { + unsigned long flags; + + spin_lock_irqsave(&sparx5->ptp_clock_lock, flags); + + /* Must be in IDLE mode before the time can be loaded */ + spx5_rmw(PTP_PTP_PIN_CFG_PTP_PIN_ACTION_SET(PTP_PIN_ACTION_IDLE) | + PTP_PTP_PIN_CFG_PTP_PIN_DOM_SET(phc->index) | + PTP_PTP_PIN_CFG_PTP_PIN_SYNC_SET(0), + PTP_PTP_PIN_CFG_PTP_PIN_ACTION | + PTP_PTP_PIN_CFG_PTP_PIN_DOM | + PTP_PTP_PIN_CFG_PTP_PIN_SYNC, + sparx5, PTP_PTP_PIN_CFG(TOD_ACC_PIN)); + + spx5_wr(PTP_PTP_TOD_NSEC_PTP_TOD_NSEC_SET(delta), + sparx5, PTP_PTP_TOD_NSEC(TOD_ACC_PIN)); + + /* Adjust time with the value of PTP_TOD_NSEC */ + spx5_rmw(PTP_PTP_PIN_CFG_PTP_PIN_ACTION_SET(PTP_PIN_ACTION_DELTA) | + PTP_PTP_PIN_CFG_PTP_PIN_DOM_SET(phc->index) | + PTP_PTP_PIN_CFG_PTP_PIN_SYNC_SET(0), + PTP_PTP_PIN_CFG_PTP_PIN_ACTION | + PTP_PTP_PIN_CFG_PTP_PIN_DOM | + PTP_PTP_PIN_CFG_PTP_PIN_SYNC, + sparx5, PTP_PTP_PIN_CFG(TOD_ACC_PIN)); + + spin_unlock_irqrestore(&sparx5->ptp_clock_lock, flags); + } else { + /* Fall back using sparx5_ptp_settime64 which is not exact */ + struct timespec64 ts; + u64 now; + + sparx5_ptp_gettime64(ptp, &ts); + + now = ktime_to_ns(timespec64_to_ktime(ts)); + ts = ns_to_timespec64(now + delta); + + sparx5_ptp_settime64(ptp, &ts); + } + + return 0; +} + +static struct ptp_clock_info sparx5_ptp_clock_info = { + .owner = THIS_MODULE, + .name = "sparx5 ptp", + .max_adj = 200000, + .gettime64 = sparx5_ptp_gettime64, + .settime64 = sparx5_ptp_settime64, + .adjtime = sparx5_ptp_adjtime, + .adjfine = sparx5_ptp_adjfine, +}; + +static int sparx5_ptp_phc_init(struct sparx5 *sparx5, + int index, + struct ptp_clock_info *clock_info) +{ + struct sparx5_phc *phc = &sparx5->phc[index]; + + phc->info = *clock_info; + phc->clock = ptp_clock_register(&phc->info, sparx5->dev); + if (IS_ERR(phc->clock)) + return PTR_ERR(phc->clock); + + phc->index = index; + phc->sparx5 = sparx5; + + /* PTP Rx stamping is always enabled. */ + phc->hwtstamp_config.rx_filter = HWTSTAMP_FILTER_PTP_V2_EVENT; + + return 0; +} + +int sparx5_ptp_init(struct sparx5 *sparx5) +{ + u64 tod_adj = sparx5_ptp_get_nominal_value(sparx5); + struct sparx5_port *port; + int err, i; + + if (!sparx5->ptp) + return 0; + + for (i = 0; i < SPARX5_PHC_COUNT; ++i) { + err = sparx5_ptp_phc_init(sparx5, i, &sparx5_ptp_clock_info); + if (err) + return err; + } + + spin_lock_init(&sparx5->ptp_clock_lock); + spin_lock_init(&sparx5->ptp_ts_id_lock); + mutex_init(&sparx5->ptp_lock); + + /* Disable master counters */ + spx5_wr(PTP_PTP_DOM_CFG_PTP_ENA_SET(0), sparx5, PTP_PTP_DOM_CFG); + + /* Configure the nominal TOD increment per clock cycle */ + spx5_rmw(PTP_PTP_DOM_CFG_PTP_CLKCFG_DIS_SET(0x7), + PTP_PTP_DOM_CFG_PTP_CLKCFG_DIS, + sparx5, PTP_PTP_DOM_CFG); + + for (i = 0; i < SPARX5_PHC_COUNT; ++i) { + spx5_wr((u32)tod_adj & 0xFFFFFFFF, sparx5, + PTP_CLK_PER_CFG(i, 0)); + spx5_wr((u32)(tod_adj >> 32), sparx5, + PTP_CLK_PER_CFG(i, 1)); + } + + spx5_rmw(PTP_PTP_DOM_CFG_PTP_CLKCFG_DIS_SET(0), + PTP_PTP_DOM_CFG_PTP_CLKCFG_DIS, + sparx5, PTP_PTP_DOM_CFG); + + /* Enable master counters */ + spx5_wr(PTP_PTP_DOM_CFG_PTP_ENA_SET(0x7), sparx5, PTP_PTP_DOM_CFG); + + for (i = 0; i < SPX5_PORTS; i++) { + port = sparx5->ports[i]; + if (!port) + continue; + + skb_queue_head_init(&port->tx_skbs); + } + + return 0; +} + +void sparx5_ptp_deinit(struct sparx5 *sparx5) +{ + struct sparx5_port *port; + int i; + + for (i = 0; i < SPX5_PORTS; i++) { + port = sparx5->ports[i]; + if (!port) + continue; + + skb_queue_purge(&port->tx_skbs); + } + + for (i = 0; i < SPARX5_PHC_COUNT; ++i) + ptp_clock_unregister(sparx5->phc[i].clock); +} + +void sparx5_ptp_rxtstamp(struct sparx5 *sparx5, struct sk_buff *skb, + u64 timestamp) +{ + struct skb_shared_hwtstamps *shhwtstamps; + struct sparx5_phc *phc; + struct timespec64 ts; + u64 full_ts_in_ns; + + if (!sparx5->ptp) + return; + + phc = &sparx5->phc[SPARX5_PHC_PORT]; + sparx5_ptp_gettime64(&phc->info, &ts); + + if (ts.tv_nsec < timestamp) + ts.tv_sec--; + ts.tv_nsec = timestamp; + full_ts_in_ns = ktime_set(ts.tv_sec, ts.tv_nsec); + + shhwtstamps = skb_hwtstamps(skb); + shhwtstamps->hwtstamp = full_ts_in_ns; +} -- cgit v1.2.3