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/phy/fixed_phy.c | 391 ++++++++++++++++++++++++++++++++++++++++++++ 1 file changed, 391 insertions(+) create mode 100644 drivers/net/phy/fixed_phy.c (limited to 'drivers/net/phy/fixed_phy.c') diff --git a/drivers/net/phy/fixed_phy.c b/drivers/net/phy/fixed_phy.c new file mode 100644 index 000000000..aef739c20 --- /dev/null +++ b/drivers/net/phy/fixed_phy.c @@ -0,0 +1,391 @@ +// SPDX-License-Identifier: GPL-2.0+ +/* + * Fixed MDIO bus (MDIO bus emulation with fixed PHYs) + * + * Author: Vitaly Bordug + * Anton Vorontsov + * + * Copyright (c) 2006-2007 MontaVista Software, Inc. + */ + +#include +#include +#include +#include +#include +#include +#include +#include +#include +#include +#include +#include +#include +#include + +#include "swphy.h" + +struct fixed_mdio_bus { + struct mii_bus *mii_bus; + struct list_head phys; +}; + +struct fixed_phy { + int addr; + struct phy_device *phydev; + struct fixed_phy_status status; + bool no_carrier; + int (*link_update)(struct net_device *, struct fixed_phy_status *); + struct list_head node; + struct gpio_desc *link_gpiod; +}; + +static struct platform_device *pdev; +static struct fixed_mdio_bus platform_fmb = { + .phys = LIST_HEAD_INIT(platform_fmb.phys), +}; + +int fixed_phy_change_carrier(struct net_device *dev, bool new_carrier) +{ + struct fixed_mdio_bus *fmb = &platform_fmb; + struct phy_device *phydev = dev->phydev; + struct fixed_phy *fp; + + if (!phydev || !phydev->mdio.bus) + return -EINVAL; + + list_for_each_entry(fp, &fmb->phys, node) { + if (fp->addr == phydev->mdio.addr) { + fp->no_carrier = !new_carrier; + return 0; + } + } + return -EINVAL; +} +EXPORT_SYMBOL_GPL(fixed_phy_change_carrier); + +static void fixed_phy_update(struct fixed_phy *fp) +{ + if (!fp->no_carrier && fp->link_gpiod) + fp->status.link = !!gpiod_get_value_cansleep(fp->link_gpiod); +} + +static int fixed_mdio_read(struct mii_bus *bus, int phy_addr, int reg_num) +{ + struct fixed_mdio_bus *fmb = bus->priv; + struct fixed_phy *fp; + + list_for_each_entry(fp, &fmb->phys, node) { + if (fp->addr == phy_addr) { + struct fixed_phy_status state; + + fp->status.link = !fp->no_carrier; + + /* Issue callback if user registered it. */ + if (fp->link_update) + fp->link_update(fp->phydev->attached_dev, + &fp->status); + + /* Check the GPIO for change in status */ + fixed_phy_update(fp); + state = fp->status; + + return swphy_read_reg(reg_num, &state); + } + } + + return 0xFFFF; +} + +static int fixed_mdio_write(struct mii_bus *bus, int phy_addr, int reg_num, + u16 val) +{ + return 0; +} + +/* + * If something weird is required to be done with link/speed, + * network driver is able to assign a function to implement this. + * May be useful for PHY's that need to be software-driven. + */ +int fixed_phy_set_link_update(struct phy_device *phydev, + int (*link_update)(struct net_device *, + struct fixed_phy_status *)) +{ + struct fixed_mdio_bus *fmb = &platform_fmb; + struct fixed_phy *fp; + + if (!phydev || !phydev->mdio.bus) + return -EINVAL; + + list_for_each_entry(fp, &fmb->phys, node) { + if (fp->addr == phydev->mdio.addr) { + fp->link_update = link_update; + fp->phydev = phydev; + return 0; + } + } + + return -ENOENT; +} +EXPORT_SYMBOL_GPL(fixed_phy_set_link_update); + +static int fixed_phy_add_gpiod(unsigned int irq, int phy_addr, + struct fixed_phy_status *status, + struct gpio_desc *gpiod) +{ + int ret; + struct fixed_mdio_bus *fmb = &platform_fmb; + struct fixed_phy *fp; + + ret = swphy_validate_state(status); + if (ret < 0) + return ret; + + fp = kzalloc(sizeof(*fp), GFP_KERNEL); + if (!fp) + return -ENOMEM; + + if (irq != PHY_POLL) + fmb->mii_bus->irq[phy_addr] = irq; + + fp->addr = phy_addr; + fp->status = *status; + fp->link_gpiod = gpiod; + + fixed_phy_update(fp); + + list_add_tail(&fp->node, &fmb->phys); + + return 0; +} + +int fixed_phy_add(unsigned int irq, int phy_addr, + struct fixed_phy_status *status) +{ + return fixed_phy_add_gpiod(irq, phy_addr, status, NULL); +} +EXPORT_SYMBOL_GPL(fixed_phy_add); + +static DEFINE_IDA(phy_fixed_ida); + +static void fixed_phy_del(int phy_addr) +{ + struct fixed_mdio_bus *fmb = &platform_fmb; + struct fixed_phy *fp, *tmp; + + list_for_each_entry_safe(fp, tmp, &fmb->phys, node) { + if (fp->addr == phy_addr) { + list_del(&fp->node); + if (fp->link_gpiod) + gpiod_put(fp->link_gpiod); + kfree(fp); + ida_free(&phy_fixed_ida, phy_addr); + return; + } + } +} + +#ifdef CONFIG_OF_GPIO +static struct gpio_desc *fixed_phy_get_gpiod(struct device_node *np) +{ + struct device_node *fixed_link_node; + struct gpio_desc *gpiod; + + if (!np) + return NULL; + + fixed_link_node = of_get_child_by_name(np, "fixed-link"); + if (!fixed_link_node) + return NULL; + + /* + * As the fixed link is just a device tree node without any + * Linux device associated with it, we simply have obtain + * the GPIO descriptor from the device tree like this. + */ + gpiod = fwnode_gpiod_get_index(of_fwnode_handle(fixed_link_node), + "link", 0, GPIOD_IN, "mdio"); + if (IS_ERR(gpiod) && PTR_ERR(gpiod) != -EPROBE_DEFER) { + if (PTR_ERR(gpiod) != -ENOENT) + pr_err("error getting GPIO for fixed link %pOF, proceed without\n", + fixed_link_node); + gpiod = NULL; + } + of_node_put(fixed_link_node); + + return gpiod; +} +#else +static struct gpio_desc *fixed_phy_get_gpiod(struct device_node *np) +{ + return NULL; +} +#endif + +static struct phy_device *__fixed_phy_register(unsigned int irq, + struct fixed_phy_status *status, + struct device_node *np, + struct gpio_desc *gpiod) +{ + struct fixed_mdio_bus *fmb = &platform_fmb; + struct phy_device *phy; + int phy_addr; + int ret; + + if (!fmb->mii_bus || fmb->mii_bus->state != MDIOBUS_REGISTERED) + return ERR_PTR(-EPROBE_DEFER); + + /* Check if we have a GPIO associated with this fixed phy */ + if (!gpiod) { + gpiod = fixed_phy_get_gpiod(np); + if (IS_ERR(gpiod)) + return ERR_CAST(gpiod); + } + + /* Get the next available PHY address, up to PHY_MAX_ADDR */ + phy_addr = ida_alloc_max(&phy_fixed_ida, PHY_MAX_ADDR - 1, GFP_KERNEL); + if (phy_addr < 0) + return ERR_PTR(phy_addr); + + ret = fixed_phy_add_gpiod(irq, phy_addr, status, gpiod); + if (ret < 0) { + ida_free(&phy_fixed_ida, phy_addr); + return ERR_PTR(ret); + } + + phy = get_phy_device(fmb->mii_bus, phy_addr, false); + if (IS_ERR(phy)) { + fixed_phy_del(phy_addr); + return ERR_PTR(-EINVAL); + } + + /* propagate the fixed link values to struct phy_device */ + phy->link = status->link; + if (status->link) { + phy->speed = status->speed; + phy->duplex = status->duplex; + phy->pause = status->pause; + phy->asym_pause = status->asym_pause; + } + + of_node_get(np); + phy->mdio.dev.of_node = np; + phy->is_pseudo_fixed_link = true; + + switch (status->speed) { + case SPEED_1000: + linkmode_set_bit(ETHTOOL_LINK_MODE_1000baseT_Half_BIT, + phy->supported); + linkmode_set_bit(ETHTOOL_LINK_MODE_1000baseT_Full_BIT, + phy->supported); + fallthrough; + case SPEED_100: + linkmode_set_bit(ETHTOOL_LINK_MODE_100baseT_Half_BIT, + phy->supported); + linkmode_set_bit(ETHTOOL_LINK_MODE_100baseT_Full_BIT, + phy->supported); + fallthrough; + case SPEED_10: + default: + linkmode_set_bit(ETHTOOL_LINK_MODE_10baseT_Half_BIT, + phy->supported); + linkmode_set_bit(ETHTOOL_LINK_MODE_10baseT_Full_BIT, + phy->supported); + } + + phy_advertise_supported(phy); + + ret = phy_device_register(phy); + if (ret) { + phy_device_free(phy); + of_node_put(np); + fixed_phy_del(phy_addr); + return ERR_PTR(ret); + } + + return phy; +} + +struct phy_device *fixed_phy_register(unsigned int irq, + struct fixed_phy_status *status, + struct device_node *np) +{ + return __fixed_phy_register(irq, status, np, NULL); +} +EXPORT_SYMBOL_GPL(fixed_phy_register); + +struct phy_device * +fixed_phy_register_with_gpiod(unsigned int irq, + struct fixed_phy_status *status, + struct gpio_desc *gpiod) +{ + return __fixed_phy_register(irq, status, NULL, gpiod); +} +EXPORT_SYMBOL_GPL(fixed_phy_register_with_gpiod); + +void fixed_phy_unregister(struct phy_device *phy) +{ + phy_device_remove(phy); + of_node_put(phy->mdio.dev.of_node); + fixed_phy_del(phy->mdio.addr); +} +EXPORT_SYMBOL_GPL(fixed_phy_unregister); + +static int __init fixed_mdio_bus_init(void) +{ + struct fixed_mdio_bus *fmb = &platform_fmb; + int ret; + + pdev = platform_device_register_simple("Fixed MDIO bus", 0, NULL, 0); + if (IS_ERR(pdev)) + return PTR_ERR(pdev); + + fmb->mii_bus = mdiobus_alloc(); + if (fmb->mii_bus == NULL) { + ret = -ENOMEM; + goto err_mdiobus_reg; + } + + snprintf(fmb->mii_bus->id, MII_BUS_ID_SIZE, "fixed-0"); + fmb->mii_bus->name = "Fixed MDIO Bus"; + fmb->mii_bus->priv = fmb; + fmb->mii_bus->parent = &pdev->dev; + fmb->mii_bus->read = &fixed_mdio_read; + fmb->mii_bus->write = &fixed_mdio_write; + fmb->mii_bus->phy_mask = ~0; + + ret = mdiobus_register(fmb->mii_bus); + if (ret) + goto err_mdiobus_alloc; + + return 0; + +err_mdiobus_alloc: + mdiobus_free(fmb->mii_bus); +err_mdiobus_reg: + platform_device_unregister(pdev); + return ret; +} +module_init(fixed_mdio_bus_init); + +static void __exit fixed_mdio_bus_exit(void) +{ + struct fixed_mdio_bus *fmb = &platform_fmb; + struct fixed_phy *fp, *tmp; + + mdiobus_unregister(fmb->mii_bus); + mdiobus_free(fmb->mii_bus); + platform_device_unregister(pdev); + + list_for_each_entry_safe(fp, tmp, &fmb->phys, node) { + list_del(&fp->node); + kfree(fp); + } + ida_destroy(&phy_fixed_ida); +} +module_exit(fixed_mdio_bus_exit); + +MODULE_DESCRIPTION("Fixed MDIO bus (MDIO bus emulation with fixed PHYs)"); +MODULE_AUTHOR("Vitaly Bordug"); +MODULE_LICENSE("GPL"); -- cgit v1.2.3