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(). ... --- sound/firewire/dice/dice.c | 426 +++++++++++++++++++++++++++++++++++++++++++++ 1 file changed, 426 insertions(+) create mode 100644 sound/firewire/dice/dice.c (limited to 'sound/firewire/dice/dice.c') diff --git a/sound/firewire/dice/dice.c b/sound/firewire/dice/dice.c new file mode 100644 index 000000000..6036a5edb --- /dev/null +++ b/sound/firewire/dice/dice.c @@ -0,0 +1,426 @@ +// SPDX-License-Identifier: GPL-2.0-only +/* + * TC Applied Technologies Digital Interface Communications Engine driver + * + * Copyright (c) Clemens Ladisch + */ + +#include "dice.h" + +MODULE_DESCRIPTION("DICE driver"); +MODULE_AUTHOR("Clemens Ladisch "); +MODULE_LICENSE("GPL v2"); + +#define OUI_WEISS 0x001c6a +#define OUI_LOUD 0x000ff2 +#define OUI_FOCUSRITE 0x00130e +#define OUI_TCELECTRONIC 0x000166 +#define OUI_ALESIS 0x000595 +#define OUI_MAUDIO 0x000d6c +#define OUI_MYTEK 0x001ee8 +#define OUI_SSL 0x0050c2 // Actually ID reserved by IEEE. +#define OUI_PRESONUS 0x000a92 +#define OUI_HARMAN 0x000fd7 +#define OUI_AVID 0x00a07e + +#define DICE_CATEGORY_ID 0x04 +#define WEISS_CATEGORY_ID 0x00 +#define LOUD_CATEGORY_ID 0x10 +#define HARMAN_CATEGORY_ID 0x20 + +#define MODEL_ALESIS_IO_BOTH 0x000001 + +static int check_dice_category(struct fw_unit *unit) +{ + struct fw_device *device = fw_parent_device(unit); + struct fw_csr_iterator it; + int key, val, vendor = -1, model = -1; + unsigned int category; + + /* + * Check that GUID and unit directory are constructed according to DICE + * rules, i.e., that the specifier ID is the GUID's OUI, and that the + * GUID chip ID consists of the 8-bit category ID, the 10-bit product + * ID, and a 22-bit serial number. + */ + fw_csr_iterator_init(&it, unit->directory); + while (fw_csr_iterator_next(&it, &key, &val)) { + switch (key) { + case CSR_SPECIFIER_ID: + vendor = val; + break; + case CSR_MODEL: + model = val; + break; + } + } + + if (vendor == OUI_WEISS) + category = WEISS_CATEGORY_ID; + else if (vendor == OUI_LOUD) + category = LOUD_CATEGORY_ID; + else if (vendor == OUI_HARMAN) + category = HARMAN_CATEGORY_ID; + else + category = DICE_CATEGORY_ID; + if (device->config_rom[3] != ((vendor << 8) | category) || + device->config_rom[4] >> 22 != model) + return -ENODEV; + + return 0; +} + +static int check_clock_caps(struct snd_dice *dice) +{ + __be32 value; + int err; + + /* some very old firmwares don't tell about their clock support */ + if (dice->clock_caps > 0) { + err = snd_dice_transaction_read_global(dice, + GLOBAL_CLOCK_CAPABILITIES, + &value, 4); + if (err < 0) + return err; + dice->clock_caps = be32_to_cpu(value); + } else { + /* this should be supported by any device */ + dice->clock_caps = CLOCK_CAP_RATE_44100 | + CLOCK_CAP_RATE_48000 | + CLOCK_CAP_SOURCE_ARX1 | + CLOCK_CAP_SOURCE_INTERNAL; + } + + return 0; +} + +static void dice_card_strings(struct snd_dice *dice) +{ + struct snd_card *card = dice->card; + struct fw_device *dev = fw_parent_device(dice->unit); + char vendor[32], model[32]; + unsigned int i; + int err; + + strcpy(card->driver, "DICE"); + + strcpy(card->shortname, "DICE"); + BUILD_BUG_ON(NICK_NAME_SIZE < sizeof(card->shortname)); + err = snd_dice_transaction_read_global(dice, GLOBAL_NICK_NAME, + card->shortname, + sizeof(card->shortname)); + if (err >= 0) { + /* DICE strings are returned in "always-wrong" endianness */ + BUILD_BUG_ON(sizeof(card->shortname) % 4 != 0); + for (i = 0; i < sizeof(card->shortname); i += 4) + swab32s((u32 *)&card->shortname[i]); + card->shortname[sizeof(card->shortname) - 1] = '\0'; + } + + strcpy(vendor, "?"); + fw_csr_string(dev->config_rom + 5, CSR_VENDOR, vendor, sizeof(vendor)); + strcpy(model, "?"); + fw_csr_string(dice->unit->directory, CSR_MODEL, model, sizeof(model)); + snprintf(card->longname, sizeof(card->longname), + "%s %s (serial %u) at %s, S%d", + vendor, model, dev->config_rom[4] & 0x3fffff, + dev_name(&dice->unit->device), 100 << dev->max_speed); + + strcpy(card->mixername, "DICE"); +} + +static void dice_card_free(struct snd_card *card) +{ + struct snd_dice *dice = card->private_data; + + snd_dice_stream_destroy_duplex(dice); + snd_dice_transaction_destroy(dice); + + mutex_destroy(&dice->mutex); + fw_unit_put(dice->unit); +} + +static int dice_probe(struct fw_unit *unit, const struct ieee1394_device_id *entry) +{ + struct snd_card *card; + struct snd_dice *dice; + snd_dice_detect_formats_t detect_formats; + int err; + + if (!entry->driver_data && entry->vendor_id != OUI_SSL) { + err = check_dice_category(unit); + if (err < 0) + return -ENODEV; + } + + err = snd_card_new(&unit->device, -1, NULL, THIS_MODULE, sizeof(*dice), &card); + if (err < 0) + return err; + card->private_free = dice_card_free; + + dice = card->private_data; + dice->unit = fw_unit_get(unit); + dev_set_drvdata(&unit->device, dice); + dice->card = card; + + if (!entry->driver_data) + detect_formats = snd_dice_stream_detect_current_formats; + else + detect_formats = (snd_dice_detect_formats_t)entry->driver_data; + + // Below models are compliant to IEC 61883-1/6 and have no quirk at high sampling transfer + // frequency. + // * Avid M-Box 3 Pro + // * M-Audio Profire 610 + // * M-Audio Profire 2626 + if (entry->vendor_id == OUI_MAUDIO || entry->vendor_id == OUI_AVID) + dice->disable_double_pcm_frames = true; + + spin_lock_init(&dice->lock); + mutex_init(&dice->mutex); + init_completion(&dice->clock_accepted); + init_waitqueue_head(&dice->hwdep_wait); + + err = snd_dice_transaction_init(dice); + if (err < 0) + goto error; + + err = check_clock_caps(dice); + if (err < 0) + goto error; + + dice_card_strings(dice); + + err = detect_formats(dice); + if (err < 0) + goto error; + + err = snd_dice_stream_init_duplex(dice); + if (err < 0) + goto error; + + snd_dice_create_proc(dice); + + err = snd_dice_create_pcm(dice); + if (err < 0) + goto error; + + err = snd_dice_create_midi(dice); + if (err < 0) + goto error; + + err = snd_dice_create_hwdep(dice); + if (err < 0) + goto error; + + err = snd_card_register(card); + if (err < 0) + goto error; + + return 0; +error: + snd_card_free(card); + return err; +} + +static void dice_remove(struct fw_unit *unit) +{ + struct snd_dice *dice = dev_get_drvdata(&unit->device); + + // Block till all of ALSA character devices are released. + snd_card_free(dice->card); +} + +static void dice_bus_reset(struct fw_unit *unit) +{ + struct snd_dice *dice = dev_get_drvdata(&unit->device); + + /* The handler address register becomes initialized. */ + snd_dice_transaction_reinit(dice); + + mutex_lock(&dice->mutex); + snd_dice_stream_update_duplex(dice); + mutex_unlock(&dice->mutex); +} + +#define DICE_INTERFACE 0x000001 + +#define DICE_DEV_ENTRY_TYPICAL(vendor, model, data) \ + { \ + .match_flags = IEEE1394_MATCH_VENDOR_ID | \ + IEEE1394_MATCH_MODEL_ID | \ + IEEE1394_MATCH_SPECIFIER_ID | \ + IEEE1394_MATCH_VERSION, \ + .vendor_id = (vendor), \ + .model_id = (model), \ + .specifier_id = (vendor), \ + .version = DICE_INTERFACE, \ + .driver_data = (kernel_ulong_t)(data), \ + } + +static const struct ieee1394_device_id dice_id_table[] = { + // Avid M-Box 3 Pro. To match in probe function. + DICE_DEV_ENTRY_TYPICAL(OUI_AVID, 0x000004, snd_dice_detect_extension_formats), + /* M-Audio Profire 2626 has a different value in version field. */ + { + .match_flags = IEEE1394_MATCH_VENDOR_ID | + IEEE1394_MATCH_MODEL_ID, + .vendor_id = OUI_MAUDIO, + .model_id = 0x000010, + .driver_data = (kernel_ulong_t)snd_dice_detect_extension_formats, + }, + /* M-Audio Profire 610 has a different value in version field. */ + { + .match_flags = IEEE1394_MATCH_VENDOR_ID | + IEEE1394_MATCH_MODEL_ID, + .vendor_id = OUI_MAUDIO, + .model_id = 0x000011, + .driver_data = (kernel_ulong_t)snd_dice_detect_extension_formats, + }, + /* TC Electronic Konnekt 24D. */ + { + .match_flags = IEEE1394_MATCH_VENDOR_ID | + IEEE1394_MATCH_MODEL_ID, + .vendor_id = OUI_TCELECTRONIC, + .model_id = 0x000020, + .driver_data = (kernel_ulong_t)snd_dice_detect_tcelectronic_formats, + }, + /* TC Electronic Konnekt 8. */ + { + .match_flags = IEEE1394_MATCH_VENDOR_ID | + IEEE1394_MATCH_MODEL_ID, + .vendor_id = OUI_TCELECTRONIC, + .model_id = 0x000021, + .driver_data = (kernel_ulong_t)snd_dice_detect_tcelectronic_formats, + }, + /* TC Electronic Studio Konnekt 48. */ + { + .match_flags = IEEE1394_MATCH_VENDOR_ID | + IEEE1394_MATCH_MODEL_ID, + .vendor_id = OUI_TCELECTRONIC, + .model_id = 0x000022, + .driver_data = (kernel_ulong_t)snd_dice_detect_tcelectronic_formats, + }, + /* TC Electronic Konnekt Live. */ + { + .match_flags = IEEE1394_MATCH_VENDOR_ID | + IEEE1394_MATCH_MODEL_ID, + .vendor_id = OUI_TCELECTRONIC, + .model_id = 0x000023, + .driver_data = (kernel_ulong_t)snd_dice_detect_tcelectronic_formats, + }, + /* TC Electronic Desktop Konnekt 6. */ + { + .match_flags = IEEE1394_MATCH_VENDOR_ID | + IEEE1394_MATCH_MODEL_ID, + .vendor_id = OUI_TCELECTRONIC, + .model_id = 0x000024, + .driver_data = (kernel_ulong_t)snd_dice_detect_tcelectronic_formats, + }, + /* TC Electronic Impact Twin. */ + { + .match_flags = IEEE1394_MATCH_VENDOR_ID | + IEEE1394_MATCH_MODEL_ID, + .vendor_id = OUI_TCELECTRONIC, + .model_id = 0x000027, + .driver_data = (kernel_ulong_t)snd_dice_detect_tcelectronic_formats, + }, + /* TC Electronic Digital Konnekt x32. */ + { + .match_flags = IEEE1394_MATCH_VENDOR_ID | + IEEE1394_MATCH_MODEL_ID, + .vendor_id = OUI_TCELECTRONIC, + .model_id = 0x000030, + .driver_data = (kernel_ulong_t)snd_dice_detect_tcelectronic_formats, + }, + /* Alesis iO14/iO26. */ + { + .match_flags = IEEE1394_MATCH_VENDOR_ID | + IEEE1394_MATCH_MODEL_ID, + .vendor_id = OUI_ALESIS, + .model_id = MODEL_ALESIS_IO_BOTH, + .driver_data = (kernel_ulong_t)snd_dice_detect_alesis_formats, + }, + // Alesis MasterControl. + { + .match_flags = IEEE1394_MATCH_VENDOR_ID | + IEEE1394_MATCH_MODEL_ID, + .vendor_id = OUI_ALESIS, + .model_id = 0x000002, + .driver_data = (kernel_ulong_t)snd_dice_detect_alesis_mastercontrol_formats, + }, + /* Mytek Stereo 192 DSD-DAC. */ + { + .match_flags = IEEE1394_MATCH_VENDOR_ID | + IEEE1394_MATCH_MODEL_ID, + .vendor_id = OUI_MYTEK, + .model_id = 0x000002, + .driver_data = (kernel_ulong_t)snd_dice_detect_mytek_formats, + }, + // Solid State Logic, Duende Classic and Mini. + // NOTE: each field of GUID in config ROM is not compliant to standard + // DICE scheme. + { + .match_flags = IEEE1394_MATCH_VENDOR_ID | + IEEE1394_MATCH_MODEL_ID, + .vendor_id = OUI_SSL, + .model_id = 0x000070, + }, + // Presonus FireStudio. + { + .match_flags = IEEE1394_MATCH_VENDOR_ID | + IEEE1394_MATCH_MODEL_ID, + .vendor_id = OUI_PRESONUS, + .model_id = 0x000008, + .driver_data = (kernel_ulong_t)snd_dice_detect_presonus_formats, + }, + // Lexicon I-ONYX FW810S. + { + .match_flags = IEEE1394_MATCH_VENDOR_ID | + IEEE1394_MATCH_MODEL_ID, + .vendor_id = OUI_HARMAN, + .model_id = 0x000001, + .driver_data = (kernel_ulong_t)snd_dice_detect_harman_formats, + }, + // Focusrite Saffire Pro 40 with TCD3070-CH. + // The model has quirk in its GUID, in which model field is 0x000013 and different from + // model ID (0x0000de) in its root/unit directory. + { + .match_flags = IEEE1394_MATCH_VENDOR_ID | + IEEE1394_MATCH_MODEL_ID, + .vendor_id = OUI_FOCUSRITE, + .model_id = 0x0000de, + .driver_data = (kernel_ulong_t)snd_dice_detect_focusrite_pro40_tcd3070_formats, + }, + { + .match_flags = IEEE1394_MATCH_VERSION, + .version = DICE_INTERFACE, + }, + { } +}; +MODULE_DEVICE_TABLE(ieee1394, dice_id_table); + +static struct fw_driver dice_driver = { + .driver = { + .owner = THIS_MODULE, + .name = KBUILD_MODNAME, + .bus = &fw_bus_type, + }, + .probe = dice_probe, + .update = dice_bus_reset, + .remove = dice_remove, + .id_table = dice_id_table, +}; + +static int __init alsa_dice_init(void) +{ + return driver_register(&dice_driver.driver); +} + +static void __exit alsa_dice_exit(void) +{ + driver_unregister(&dice_driver.driver); +} + +module_init(alsa_dice_init); +module_exit(alsa_dice_exit); -- cgit v1.2.3