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/i2c/muxes/i2c-mux-mlxcpld.c | 194 ++++++++++++++++++++++++++++++++++++ 1 file changed, 194 insertions(+) create mode 100644 drivers/i2c/muxes/i2c-mux-mlxcpld.c (limited to 'drivers/i2c/muxes/i2c-mux-mlxcpld.c') diff --git a/drivers/i2c/muxes/i2c-mux-mlxcpld.c b/drivers/i2c/muxes/i2c-mux-mlxcpld.c new file mode 100644 index 000000000..1a879f6a3 --- /dev/null +++ b/drivers/i2c/muxes/i2c-mux-mlxcpld.c @@ -0,0 +1,194 @@ +// SPDX-License-Identifier: BSD-3-Clause OR GPL-2.0 +/* + * Mellanox i2c mux driver + * + * Copyright (C) 2016-2020 Mellanox Technologies + */ + +#include +#include +#include +#include +#include +#include +#include +#include +#include + +/* mlxcpld_mux - mux control structure: + * @last_val - last selected register value or -1 if mux deselected + * @client - I2C device client + * @pdata: platform data + */ +struct mlxcpld_mux { + int last_val; + struct i2c_client *client; + struct mlxcpld_mux_plat_data pdata; +}; + +/* MUX logic description. + * Driver can support different mux control logic, according to CPLD + * implementation. + * + * Connectivity schema. + * + * i2c-mlxcpld Digital Analog + * driver + * *--------* * -> mux1 (virt bus2) -> mux -> | + * | I2CLPC | i2c physical * -> mux2 (virt bus3) -> mux -> | + * | bridge | bus 1 *---------* | + * | logic |---------------------> * mux reg * | + * | in CPLD| *---------* | + * *--------* i2c-mux-mlxpcld ^ * -> muxn (virt busn) -> mux -> | + * | driver | | + * | *---------------* | Devices + * | * CPLD (i2c bus)* select | + * | * registers for *--------* + * | * mux selection * deselect + * | *---------------* + * | | + * <--------> <-----------> + * i2c cntrl Board cntrl reg + * reg space space (mux select, + * IO, LED, WD, info) + * + */ + +/* Write to mux register. Don't use i2c_transfer() and i2c_smbus_xfer() + * for this as they will try to lock adapter a second time. + */ +static int mlxcpld_mux_reg_write(struct i2c_adapter *adap, + struct mlxcpld_mux *mux, u32 val) +{ + struct i2c_client *client = mux->client; + union i2c_smbus_data data; + struct i2c_msg msg; + u8 buf[3]; + + switch (mux->pdata.reg_size) { + case 1: + data.byte = val; + return __i2c_smbus_xfer(adap, client->addr, client->flags, + I2C_SMBUS_WRITE, mux->pdata.sel_reg_addr, + I2C_SMBUS_BYTE_DATA, &data); + case 2: + buf[0] = mux->pdata.sel_reg_addr >> 8; + buf[1] = mux->pdata.sel_reg_addr; + buf[2] = val; + msg.addr = client->addr; + msg.buf = buf; + msg.len = mux->pdata.reg_size + 1; + msg.flags = 0; + return __i2c_transfer(adap, &msg, 1); + default: + return -EINVAL; + } +} + +static int mlxcpld_mux_select_chan(struct i2c_mux_core *muxc, u32 chan) +{ + struct mlxcpld_mux *mux = i2c_mux_priv(muxc); + u32 regval = chan; + int err = 0; + + if (mux->pdata.reg_size == 1) + regval += 1; + + /* Only select the channel if its different from the last channel */ + if (mux->last_val != regval) { + err = mlxcpld_mux_reg_write(muxc->parent, mux, regval); + mux->last_val = err < 0 ? -1 : regval; + } + + return err; +} + +static int mlxcpld_mux_deselect(struct i2c_mux_core *muxc, u32 chan) +{ + struct mlxcpld_mux *mux = i2c_mux_priv(muxc); + + /* Deselect active channel */ + mux->last_val = -1; + + return mlxcpld_mux_reg_write(muxc->parent, mux, 0); +} + +/* Probe/reomove functions */ +static int mlxcpld_mux_probe(struct platform_device *pdev) +{ + struct mlxcpld_mux_plat_data *pdata = dev_get_platdata(&pdev->dev); + struct i2c_client *client = to_i2c_client(pdev->dev.parent); + struct i2c_mux_core *muxc; + struct mlxcpld_mux *data; + int num, err; + u32 func; + + if (!pdata) + return -EINVAL; + + switch (pdata->reg_size) { + case 1: + func = I2C_FUNC_SMBUS_WRITE_BYTE_DATA; + break; + case 2: + func = I2C_FUNC_I2C; + break; + default: + return -EINVAL; + } + + if (!i2c_check_functionality(client->adapter, func)) + return -ENODEV; + + muxc = i2c_mux_alloc(client->adapter, &pdev->dev, pdata->num_adaps, + sizeof(*data), 0, mlxcpld_mux_select_chan, + mlxcpld_mux_deselect); + if (!muxc) + return -ENOMEM; + + platform_set_drvdata(pdev, muxc); + data = i2c_mux_priv(muxc); + data->client = client; + memcpy(&data->pdata, pdata, sizeof(*pdata)); + data->last_val = -1; /* force the first selection */ + + /* Create an adapter for each channel. */ + for (num = 0; num < pdata->num_adaps; num++) { + err = i2c_mux_add_adapter(muxc, 0, pdata->chan_ids[num], 0); + if (err) + goto virt_reg_failed; + } + + /* Notify caller when all channels' adapters are created. */ + if (pdata->completion_notify) + pdata->completion_notify(pdata->handle, muxc->parent, muxc->adapter); + + return 0; + +virt_reg_failed: + i2c_mux_del_adapters(muxc); + return err; +} + +static int mlxcpld_mux_remove(struct platform_device *pdev) +{ + struct i2c_mux_core *muxc = platform_get_drvdata(pdev); + + i2c_mux_del_adapters(muxc); + return 0; +} + +static struct platform_driver mlxcpld_mux_driver = { + .driver = { + .name = "i2c-mux-mlxcpld", + }, + .probe = mlxcpld_mux_probe, + .remove = mlxcpld_mux_remove, +}; + +module_platform_driver(mlxcpld_mux_driver); + +MODULE_AUTHOR("Michael Shych (michaels@mellanox.com)"); +MODULE_DESCRIPTION("Mellanox I2C-CPLD-MUX driver"); +MODULE_LICENSE("Dual BSD/GPL"); +MODULE_ALIAS("platform:i2c-mux-mlxcpld"); -- cgit v1.2.3