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/hwmon/lm83.c | 467 +++++++++++++++++++++++++++++++++++++++++++++++++++ 1 file changed, 467 insertions(+) create mode 100644 drivers/hwmon/lm83.c (limited to 'drivers/hwmon/lm83.c') diff --git a/drivers/hwmon/lm83.c b/drivers/hwmon/lm83.c new file mode 100644 index 000000000..616449f2c --- /dev/null +++ b/drivers/hwmon/lm83.c @@ -0,0 +1,467 @@ +// SPDX-License-Identifier: GPL-2.0-or-later +/* + * lm83.c - Part of lm_sensors, Linux kernel modules for hardware + * monitoring + * Copyright (C) 2003-2009 Jean Delvare + * + * Heavily inspired from the lm78, lm75 and adm1021 drivers. The LM83 is + * a sensor chip made by National Semiconductor. It reports up to four + * temperatures (its own plus up to three external ones) with a 1 deg + * resolution and a 3-4 deg accuracy. Complete datasheet can be obtained + * from National's website at: + * http://www.national.com/pf/LM/LM83.html + * Since the datasheet omits to give the chip stepping code, I give it + * here: 0x03 (at register 0xff). + * + * Also supports the LM82 temp sensor, which is basically a stripped down + * model of the LM83. Datasheet is here: + * http://www.national.com/pf/LM/LM82.html + */ + +#include +#include +#include +#include +#include +#include +#include +#include + +/* + * Addresses to scan + * Address is selected using 2 three-level pins, resulting in 9 possible + * addresses. + */ + +static const unsigned short normal_i2c[] = { + 0x18, 0x19, 0x1a, 0x29, 0x2a, 0x2b, 0x4c, 0x4d, 0x4e, I2C_CLIENT_END }; + +enum chips { lm83, lm82 }; + +/* + * The LM83 registers + * Manufacturer ID is 0x01 for National Semiconductor. + */ + +#define LM83_REG_R_MAN_ID 0xFE +#define LM83_REG_R_CHIP_ID 0xFF +#define LM83_REG_R_CONFIG 0x03 +#define LM83_REG_W_CONFIG 0x09 +#define LM83_REG_R_STATUS1 0x02 +#define LM83_REG_R_STATUS2 0x35 +#define LM83_REG_R_LOCAL_TEMP 0x00 +#define LM83_REG_R_LOCAL_HIGH 0x05 +#define LM83_REG_W_LOCAL_HIGH 0x0B +#define LM83_REG_R_REMOTE1_TEMP 0x30 +#define LM83_REG_R_REMOTE1_HIGH 0x38 +#define LM83_REG_W_REMOTE1_HIGH 0x50 +#define LM83_REG_R_REMOTE2_TEMP 0x01 +#define LM83_REG_R_REMOTE2_HIGH 0x07 +#define LM83_REG_W_REMOTE2_HIGH 0x0D +#define LM83_REG_R_REMOTE3_TEMP 0x31 +#define LM83_REG_R_REMOTE3_HIGH 0x3A +#define LM83_REG_W_REMOTE3_HIGH 0x52 +#define LM83_REG_R_TCRIT 0x42 +#define LM83_REG_W_TCRIT 0x5A + +static const u8 LM83_REG_TEMP[] = { + LM83_REG_R_LOCAL_TEMP, + LM83_REG_R_REMOTE1_TEMP, + LM83_REG_R_REMOTE2_TEMP, + LM83_REG_R_REMOTE3_TEMP, +}; + +static const u8 LM83_REG_MAX[] = { + LM83_REG_R_LOCAL_HIGH, + LM83_REG_R_REMOTE1_HIGH, + LM83_REG_R_REMOTE2_HIGH, + LM83_REG_R_REMOTE3_HIGH, +}; + +/* alarm and fault registers and bits, indexed by channel */ +static const u8 LM83_ALARM_REG[] = { + LM83_REG_R_STATUS1, LM83_REG_R_STATUS2, LM83_REG_R_STATUS1, LM83_REG_R_STATUS2 +}; + +static const u8 LM83_MAX_ALARM_BIT[] = { + BIT(6), BIT(7), BIT(4), BIT(4) +}; + +static const u8 LM83_CRIT_ALARM_BIT[] = { + BIT(0), BIT(0), BIT(1), BIT(1) +}; + +static const u8 LM83_FAULT_BIT[] = { + 0, BIT(5), BIT(2), BIT(2) +}; + +/* + * Client data (each client gets its own) + */ + +struct lm83_data { + struct regmap *regmap; + enum chips type; +}; + +/* regmap code */ + +static int lm83_regmap_reg_read(void *context, unsigned int reg, unsigned int *val) +{ + struct i2c_client *client = context; + int ret; + + ret = i2c_smbus_read_byte_data(client, reg); + if (ret < 0) + return ret; + + *val = ret; + return 0; +} + +/* + * The regmap write function maps read register addresses to write register + * addresses. This is necessary for regmap register caching to work. + * An alternative would be to clear the regmap cache whenever a register is + * written, but that would be much more expensive. + */ +static int lm83_regmap_reg_write(void *context, unsigned int reg, unsigned int val) +{ + struct i2c_client *client = context; + + switch (reg) { + case LM83_REG_R_CONFIG: + case LM83_REG_R_LOCAL_HIGH: + case LM83_REG_R_REMOTE2_HIGH: + reg += 0x06; + break; + case LM83_REG_R_REMOTE1_HIGH: + case LM83_REG_R_REMOTE3_HIGH: + case LM83_REG_R_TCRIT: + reg += 0x18; + break; + default: + break; + } + + return i2c_smbus_write_byte_data(client, reg, val); +} + +static bool lm83_regmap_is_volatile(struct device *dev, unsigned int reg) +{ + switch (reg) { + case LM83_REG_R_LOCAL_TEMP: + case LM83_REG_R_REMOTE1_TEMP: + case LM83_REG_R_REMOTE2_TEMP: + case LM83_REG_R_REMOTE3_TEMP: + case LM83_REG_R_STATUS1: + case LM83_REG_R_STATUS2: + return true; + default: + return false; + } +} + +static const struct regmap_config lm83_regmap_config = { + .reg_bits = 8, + .val_bits = 8, + .cache_type = REGCACHE_RBTREE, + .volatile_reg = lm83_regmap_is_volatile, + .reg_read = lm83_regmap_reg_read, + .reg_write = lm83_regmap_reg_write, +}; + +/* hwmon API */ + +static int lm83_temp_read(struct device *dev, u32 attr, int channel, long *val) +{ + struct lm83_data *data = dev_get_drvdata(dev); + unsigned int regval; + int err; + + switch (attr) { + case hwmon_temp_input: + err = regmap_read(data->regmap, LM83_REG_TEMP[channel], ®val); + if (err < 0) + return err; + *val = (s8)regval * 1000; + break; + case hwmon_temp_max: + err = regmap_read(data->regmap, LM83_REG_MAX[channel], ®val); + if (err < 0) + return err; + *val = (s8)regval * 1000; + break; + case hwmon_temp_crit: + err = regmap_read(data->regmap, LM83_REG_R_TCRIT, ®val); + if (err < 0) + return err; + *val = (s8)regval * 1000; + break; + case hwmon_temp_max_alarm: + err = regmap_read(data->regmap, LM83_ALARM_REG[channel], ®val); + if (err < 0) + return err; + *val = !!(regval & LM83_MAX_ALARM_BIT[channel]); + break; + case hwmon_temp_crit_alarm: + err = regmap_read(data->regmap, LM83_ALARM_REG[channel], ®val); + if (err < 0) + return err; + *val = !!(regval & LM83_CRIT_ALARM_BIT[channel]); + break; + case hwmon_temp_fault: + err = regmap_read(data->regmap, LM83_ALARM_REG[channel], ®val); + if (err < 0) + return err; + *val = !!(regval & LM83_FAULT_BIT[channel]); + break; + default: + return -EOPNOTSUPP; + } + return 0; +} + +static int lm83_temp_write(struct device *dev, u32 attr, int channel, long val) +{ + struct lm83_data *data = dev_get_drvdata(dev); + unsigned int regval; + int err; + + regval = DIV_ROUND_CLOSEST(clamp_val(val, -128000, 127000), 1000); + + switch (attr) { + case hwmon_temp_max: + err = regmap_write(data->regmap, LM83_REG_MAX[channel], regval); + if (err < 0) + return err; + break; + case hwmon_temp_crit: + err = regmap_write(data->regmap, LM83_REG_R_TCRIT, regval); + if (err < 0) + return err; + break; + default: + return -EOPNOTSUPP; + } + return 0; +} + +static int lm83_chip_read(struct device *dev, u32 attr, int channel, long *val) +{ + struct lm83_data *data = dev_get_drvdata(dev); + unsigned int regval; + int err; + + switch (attr) { + case hwmon_chip_alarms: + err = regmap_read(data->regmap, LM83_REG_R_STATUS1, ®val); + if (err < 0) + return err; + *val = regval; + err = regmap_read(data->regmap, LM83_REG_R_STATUS2, ®val); + if (err < 0) + return err; + *val |= regval << 8; + return 0; + default: + return -EOPNOTSUPP; + } + + return 0; +} + +static int lm83_read(struct device *dev, enum hwmon_sensor_types type, + u32 attr, int channel, long *val) +{ + switch (type) { + case hwmon_chip: + return lm83_chip_read(dev, attr, channel, val); + case hwmon_temp: + return lm83_temp_read(dev, attr, channel, val); + default: + return -EOPNOTSUPP; + } +} + +static int lm83_write(struct device *dev, enum hwmon_sensor_types type, + u32 attr, int channel, long val) +{ + switch (type) { + case hwmon_temp: + return lm83_temp_write(dev, attr, channel, val); + default: + return -EOPNOTSUPP; + } +} + +static umode_t lm83_is_visible(const void *_data, enum hwmon_sensor_types type, + u32 attr, int channel) +{ + const struct lm83_data *data = _data; + + /* + * LM82 only supports a single external channel, modeled as channel 2. + */ + if (data->type == lm82 && (channel == 1 || channel == 3)) + return 0; + + switch (type) { + case hwmon_chip: + if (attr == hwmon_chip_alarms) + return 0444; + break; + case hwmon_temp: + switch (attr) { + case hwmon_temp_input: + case hwmon_temp_max_alarm: + case hwmon_temp_crit_alarm: + return 0444; + case hwmon_temp_fault: + if (channel) + return 0444; + break; + case hwmon_temp_max: + return 0644; + case hwmon_temp_crit: + if (channel == 2) + return 0644; + return 0444; + default: + break; + } + break; + default: + break; + } + return 0; +} + +static const struct hwmon_channel_info *lm83_info[] = { + HWMON_CHANNEL_INFO(chip, HWMON_C_ALARMS), + HWMON_CHANNEL_INFO(temp, + HWMON_T_INPUT | HWMON_T_MAX | HWMON_T_CRIT | + HWMON_T_MAX_ALARM | HWMON_T_CRIT_ALARM, + HWMON_T_INPUT | HWMON_T_MAX | HWMON_T_CRIT | + HWMON_T_MAX_ALARM | HWMON_T_CRIT_ALARM | HWMON_T_FAULT, + HWMON_T_INPUT | HWMON_T_MAX | HWMON_T_CRIT | + HWMON_T_MAX_ALARM | HWMON_T_CRIT_ALARM | HWMON_T_FAULT, + HWMON_T_INPUT | HWMON_T_MAX | HWMON_T_CRIT | + HWMON_T_MAX_ALARM | HWMON_T_CRIT_ALARM | HWMON_T_FAULT + ), + NULL +}; + +static const struct hwmon_ops lm83_hwmon_ops = { + .is_visible = lm83_is_visible, + .read = lm83_read, + .write = lm83_write, +}; + +static const struct hwmon_chip_info lm83_chip_info = { + .ops = &lm83_hwmon_ops, + .info = lm83_info, +}; + +/* Return 0 if detection is successful, -ENODEV otherwise */ +static int lm83_detect(struct i2c_client *client, + struct i2c_board_info *info) +{ + struct i2c_adapter *adapter = client->adapter; + const char *name; + u8 man_id, chip_id; + + if (!i2c_check_functionality(adapter, I2C_FUNC_SMBUS_BYTE_DATA)) + return -ENODEV; + + /* Detection */ + if ((i2c_smbus_read_byte_data(client, LM83_REG_R_STATUS1) & 0xA8) || + (i2c_smbus_read_byte_data(client, LM83_REG_R_STATUS2) & 0x48) || + (i2c_smbus_read_byte_data(client, LM83_REG_R_CONFIG) & 0x41)) { + dev_dbg(&adapter->dev, "LM83 detection failed at 0x%02x\n", + client->addr); + return -ENODEV; + } + + /* Identification */ + man_id = i2c_smbus_read_byte_data(client, LM83_REG_R_MAN_ID); + if (man_id != 0x01) /* National Semiconductor */ + return -ENODEV; + + chip_id = i2c_smbus_read_byte_data(client, LM83_REG_R_CHIP_ID); + switch (chip_id) { + case 0x03: + /* + * According to the LM82 datasheet dated March 2013, recent + * revisions of LM82 have a die revision of 0x03. This was + * confirmed with a real chip. Further details in this revision + * of the LM82 datasheet strongly suggest that LM82 is just a + * repackaged LM83. It is therefore impossible to distinguish + * those chips from LM83, and they will be misdetected as LM83. + */ + name = "lm83"; + break; + case 0x01: + name = "lm82"; + break; + default: + /* identification failed */ + dev_dbg(&adapter->dev, + "Unsupported chip (man_id=0x%02X, chip_id=0x%02X)\n", + man_id, chip_id); + return -ENODEV; + } + + strscpy(info->type, name, I2C_NAME_SIZE); + + return 0; +} + +static const struct i2c_device_id lm83_id[] = { + { "lm83", lm83 }, + { "lm82", lm82 }, + { } +}; +MODULE_DEVICE_TABLE(i2c, lm83_id); + +static int lm83_probe(struct i2c_client *client) +{ + struct device *dev = &client->dev; + struct device *hwmon_dev; + struct lm83_data *data; + + data = devm_kzalloc(dev, sizeof(struct lm83_data), GFP_KERNEL); + if (!data) + return -ENOMEM; + + data->regmap = devm_regmap_init(dev, NULL, client, &lm83_regmap_config); + if (IS_ERR(data->regmap)) + return PTR_ERR(data->regmap); + + data->type = i2c_match_id(lm83_id, client)->driver_data; + + hwmon_dev = devm_hwmon_device_register_with_info(dev, client->name, + data, &lm83_chip_info, NULL); + return PTR_ERR_OR_ZERO(hwmon_dev); +} + +/* + * Driver data (common to all clients) + */ + +static struct i2c_driver lm83_driver = { + .class = I2C_CLASS_HWMON, + .driver = { + .name = "lm83", + }, + .probe_new = lm83_probe, + .id_table = lm83_id, + .detect = lm83_detect, + .address_list = normal_i2c, +}; + +module_i2c_driver(lm83_driver); + +MODULE_AUTHOR("Jean Delvare "); +MODULE_DESCRIPTION("LM83 driver"); +MODULE_LICENSE("GPL"); -- cgit v1.2.3