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/regulator/fixed.c | 356 ++++++++++++++++++++++++++++++++++++++++++++++ 1 file changed, 356 insertions(+) create mode 100644 drivers/regulator/fixed.c (limited to 'drivers/regulator/fixed.c') diff --git a/drivers/regulator/fixed.c b/drivers/regulator/fixed.c new file mode 100644 index 000000000..2a9867abb --- /dev/null +++ b/drivers/regulator/fixed.c @@ -0,0 +1,356 @@ +// SPDX-License-Identifier: GPL-2.0-or-later +/* + * fixed.c + * + * Copyright 2008 Wolfson Microelectronics PLC. + * + * Author: Mark Brown + * + * Copyright (c) 2009 Nokia Corporation + * Roger Quadros + * + * This is useful for systems with mixed controllable and + * non-controllable regulators, as well as for allowing testing on + * systems with no controllable regulators. + */ + +#include +#include +#include +#include +#include +#include +#include +#include +#include +#include +#include +#include +#include +#include +#include + + +struct fixed_voltage_data { + struct regulator_desc desc; + struct regulator_dev *dev; + + struct clk *enable_clock; + unsigned int enable_counter; + int performance_state; +}; + +struct fixed_dev_type { + bool has_enable_clock; + bool has_performance_state; +}; + +static int reg_clock_enable(struct regulator_dev *rdev) +{ + struct fixed_voltage_data *priv = rdev_get_drvdata(rdev); + int ret = 0; + + ret = clk_prepare_enable(priv->enable_clock); + if (ret) + return ret; + + priv->enable_counter++; + + return ret; +} + +static int reg_clock_disable(struct regulator_dev *rdev) +{ + struct fixed_voltage_data *priv = rdev_get_drvdata(rdev); + + clk_disable_unprepare(priv->enable_clock); + priv->enable_counter--; + + return 0; +} + +static int reg_domain_enable(struct regulator_dev *rdev) +{ + struct fixed_voltage_data *priv = rdev_get_drvdata(rdev); + struct device *dev = rdev->dev.parent; + int ret; + + ret = dev_pm_genpd_set_performance_state(dev, priv->performance_state); + if (ret) + return ret; + + priv->enable_counter++; + + return ret; +} + +static int reg_domain_disable(struct regulator_dev *rdev) +{ + struct fixed_voltage_data *priv = rdev_get_drvdata(rdev); + struct device *dev = rdev->dev.parent; + int ret; + + ret = dev_pm_genpd_set_performance_state(dev, 0); + if (ret) + return ret; + + priv->enable_counter--; + + return 0; +} + +static int reg_is_enabled(struct regulator_dev *rdev) +{ + struct fixed_voltage_data *priv = rdev_get_drvdata(rdev); + + return priv->enable_counter > 0; +} + + +/** + * of_get_fixed_voltage_config - extract fixed_voltage_config structure info + * @dev: device requesting for fixed_voltage_config + * @desc: regulator description + * + * Populates fixed_voltage_config structure by extracting data from device + * tree node, returns a pointer to the populated structure of NULL if memory + * alloc fails. + */ +static struct fixed_voltage_config * +of_get_fixed_voltage_config(struct device *dev, + const struct regulator_desc *desc) +{ + struct fixed_voltage_config *config; + struct device_node *np = dev->of_node; + struct regulator_init_data *init_data; + + config = devm_kzalloc(dev, sizeof(struct fixed_voltage_config), + GFP_KERNEL); + if (!config) + return ERR_PTR(-ENOMEM); + + config->init_data = of_get_regulator_init_data(dev, dev->of_node, desc); + if (!config->init_data) + return ERR_PTR(-EINVAL); + + init_data = config->init_data; + init_data->constraints.apply_uV = 0; + + config->supply_name = init_data->constraints.name; + if (init_data->constraints.min_uV == init_data->constraints.max_uV) { + config->microvolts = init_data->constraints.min_uV; + } else { + dev_err(dev, + "Fixed regulator specified with variable voltages\n"); + return ERR_PTR(-EINVAL); + } + + if (init_data->constraints.boot_on) + config->enabled_at_boot = true; + + of_property_read_u32(np, "startup-delay-us", &config->startup_delay); + of_property_read_u32(np, "off-on-delay-us", &config->off_on_delay); + + if (of_find_property(np, "vin-supply", NULL)) + config->input_supply = "vin"; + + return config; +} + +static const struct regulator_ops fixed_voltage_ops = { +}; + +static const struct regulator_ops fixed_voltage_clkenabled_ops = { + .enable = reg_clock_enable, + .disable = reg_clock_disable, + .is_enabled = reg_is_enabled, +}; + +static const struct regulator_ops fixed_voltage_domain_ops = { + .enable = reg_domain_enable, + .disable = reg_domain_disable, + .is_enabled = reg_is_enabled, +}; + +static int reg_fixed_voltage_probe(struct platform_device *pdev) +{ + struct device *dev = &pdev->dev; + struct fixed_voltage_config *config; + struct fixed_voltage_data *drvdata; + const struct fixed_dev_type *drvtype = of_device_get_match_data(dev); + struct regulator_config cfg = { }; + enum gpiod_flags gflags; + int ret; + + drvdata = devm_kzalloc(&pdev->dev, sizeof(struct fixed_voltage_data), + GFP_KERNEL); + if (!drvdata) + return -ENOMEM; + + if (pdev->dev.of_node) { + config = of_get_fixed_voltage_config(&pdev->dev, + &drvdata->desc); + if (IS_ERR(config)) + return PTR_ERR(config); + } else { + config = dev_get_platdata(&pdev->dev); + } + + if (!config) + return -ENOMEM; + + drvdata->desc.name = devm_kstrdup(&pdev->dev, + config->supply_name, + GFP_KERNEL); + if (drvdata->desc.name == NULL) { + dev_err(&pdev->dev, "Failed to allocate supply name\n"); + return -ENOMEM; + } + drvdata->desc.type = REGULATOR_VOLTAGE; + drvdata->desc.owner = THIS_MODULE; + + if (drvtype && drvtype->has_enable_clock) { + drvdata->desc.ops = &fixed_voltage_clkenabled_ops; + + drvdata->enable_clock = devm_clk_get(dev, NULL); + if (IS_ERR(drvdata->enable_clock)) { + dev_err(dev, "Can't get enable-clock from devicetree\n"); + return -ENOENT; + } + } else if (drvtype && drvtype->has_performance_state) { + drvdata->desc.ops = &fixed_voltage_domain_ops; + + drvdata->performance_state = of_get_required_opp_performance_state(dev->of_node, 0); + if (drvdata->performance_state < 0) { + dev_err(dev, "Can't get performance state from devicetree\n"); + return drvdata->performance_state; + } + } else { + drvdata->desc.ops = &fixed_voltage_ops; + } + + drvdata->desc.enable_time = config->startup_delay; + drvdata->desc.off_on_delay = config->off_on_delay; + + if (config->input_supply) { + drvdata->desc.supply_name = devm_kstrdup(&pdev->dev, + config->input_supply, + GFP_KERNEL); + if (!drvdata->desc.supply_name) + return -ENOMEM; + } + + if (config->microvolts) + drvdata->desc.n_voltages = 1; + + drvdata->desc.fixed_uV = config->microvolts; + + /* + * The signal will be inverted by the GPIO core if flagged so in the + * descriptor. + */ + if (config->enabled_at_boot) + gflags = GPIOD_OUT_HIGH; + else + gflags = GPIOD_OUT_LOW; + + /* + * Some fixed regulators share the enable line between two + * regulators which makes it necessary to get a handle on the + * same descriptor for two different consumers. This will get + * the GPIO descriptor, but only the first call will initialize + * it so any flags such as inversion or open drain will only + * be set up by the first caller and assumed identical on the + * next caller. + * + * FIXME: find a better way to deal with this. + */ + gflags |= GPIOD_FLAGS_BIT_NONEXCLUSIVE; + + /* + * Do not use devm* here: the regulator core takes over the + * lifecycle management of the GPIO descriptor. + */ + cfg.ena_gpiod = gpiod_get_optional(&pdev->dev, NULL, gflags); + if (IS_ERR(cfg.ena_gpiod)) + return dev_err_probe(&pdev->dev, PTR_ERR(cfg.ena_gpiod), + "can't get GPIO\n"); + + cfg.dev = &pdev->dev; + cfg.init_data = config->init_data; + cfg.driver_data = drvdata; + cfg.of_node = pdev->dev.of_node; + + drvdata->dev = devm_regulator_register(&pdev->dev, &drvdata->desc, + &cfg); + if (IS_ERR(drvdata->dev)) { + ret = dev_err_probe(&pdev->dev, PTR_ERR(drvdata->dev), + "Failed to register regulator: %ld\n", + PTR_ERR(drvdata->dev)); + return ret; + } + + platform_set_drvdata(pdev, drvdata); + + dev_dbg(&pdev->dev, "%s supplying %duV\n", drvdata->desc.name, + drvdata->desc.fixed_uV); + + return 0; +} + +#if defined(CONFIG_OF) +static const struct fixed_dev_type fixed_voltage_data = { + .has_enable_clock = false, +}; + +static const struct fixed_dev_type fixed_clkenable_data = { + .has_enable_clock = true, +}; + +static const struct fixed_dev_type fixed_domain_data = { + .has_performance_state = true, +}; + +static const struct of_device_id fixed_of_match[] = { + { + .compatible = "regulator-fixed", + .data = &fixed_voltage_data, + }, + { + .compatible = "regulator-fixed-clock", + .data = &fixed_clkenable_data, + }, + { + .compatible = "regulator-fixed-domain", + .data = &fixed_domain_data, + }, + { + }, +}; +MODULE_DEVICE_TABLE(of, fixed_of_match); +#endif + +static struct platform_driver regulator_fixed_voltage_driver = { + .probe = reg_fixed_voltage_probe, + .driver = { + .name = "reg-fixed-voltage", + .of_match_table = of_match_ptr(fixed_of_match), + }, +}; + +static int __init regulator_fixed_voltage_init(void) +{ + return platform_driver_register(®ulator_fixed_voltage_driver); +} +subsys_initcall(regulator_fixed_voltage_init); + +static void __exit regulator_fixed_voltage_exit(void) +{ + platform_driver_unregister(®ulator_fixed_voltage_driver); +} +module_exit(regulator_fixed_voltage_exit); + +MODULE_AUTHOR("Mark Brown "); +MODULE_DESCRIPTION("Fixed voltage regulator"); +MODULE_LICENSE("GPL"); +MODULE_ALIAS("platform:reg-fixed-voltage"); -- cgit v1.2.3