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/platform/mellanox/mlxreg-lc.c | 960 ++++++++++++++++++++++++++++++++++ 1 file changed, 960 insertions(+) create mode 100644 drivers/platform/mellanox/mlxreg-lc.c (limited to 'drivers/platform/mellanox/mlxreg-lc.c') diff --git a/drivers/platform/mellanox/mlxreg-lc.c b/drivers/platform/mellanox/mlxreg-lc.c new file mode 100644 index 000000000..8d833836a --- /dev/null +++ b/drivers/platform/mellanox/mlxreg-lc.c @@ -0,0 +1,960 @@ +// SPDX-License-Identifier: GPL-2.0+ +/* + * Nvidia line card driver + * + * Copyright (C) 2020 Nvidia Technologies Ltd. + */ + +#include +#include +#include +#include +#include +#include +#include + +/* I2C bus IO offsets */ +#define MLXREG_LC_REG_CPLD1_VER_OFFSET 0x2500 +#define MLXREG_LC_REG_FPGA1_VER_OFFSET 0x2501 +#define MLXREG_LC_REG_CPLD1_PN_OFFSET 0x2504 +#define MLXREG_LC_REG_FPGA1_PN_OFFSET 0x2506 +#define MLXREG_LC_REG_RESET_CAUSE_OFFSET 0x251d +#define MLXREG_LC_REG_LED1_OFFSET 0x2520 +#define MLXREG_LC_REG_GP0_OFFSET 0x252e +#define MLXREG_LC_REG_FIELD_UPGRADE 0x2534 +#define MLXREG_LC_CHANNEL_I2C_REG 0x25dc +#define MLXREG_LC_REG_CPLD1_MVER_OFFSET 0x25de +#define MLXREG_LC_REG_FPGA1_MVER_OFFSET 0x25df +#define MLXREG_LC_REG_MAX_POWER_OFFSET 0x25f1 +#define MLXREG_LC_REG_CONFIG_OFFSET 0x25fb +#define MLXREG_LC_REG_MAX 0x3fff + +/** + * enum mlxreg_lc_type - line cards types + * + * @MLXREG_LC_SN4800_C16: 100GbE line card with 16 QSFP28 ports; + */ +enum mlxreg_lc_type { + MLXREG_LC_SN4800_C16 = 0x0000, +}; + +/** + * enum mlxreg_lc_state - line cards state + * + * @MLXREG_LC_INITIALIZED: line card is initialized; + * @MLXREG_LC_POWERED: line card is powered; + * @MLXREG_LC_SYNCED: line card is synchronized between hardware and firmware; + */ +enum mlxreg_lc_state { + MLXREG_LC_INITIALIZED = BIT(0), + MLXREG_LC_POWERED = BIT(1), + MLXREG_LC_SYNCED = BIT(2), +}; + +#define MLXREG_LC_CONFIGURED (MLXREG_LC_INITIALIZED | MLXREG_LC_POWERED | MLXREG_LC_SYNCED) + +/* mlxreg_lc - device private data + * @dev: platform device; + * @lock: line card lock; + * @par_regmap: parent device regmap handle; + * @data: pltaform core data; + * @io_data: register access platform data; + * @led_data: LED platform data ; + * @mux_data: MUX platform data; + * @led: LED device; + * @io_regs: register access device; + * @mux_brdinfo: mux configuration; + * @mux: mux devices; + * @aux_devs: I2C devices feeding by auxiliary power; + * @aux_devs_num: number of I2C devices feeding by auxiliary power; + * @main_devs: I2C devices feeding by main power; + * @main_devs_num: number of I2C devices feeding by main power; + * @state: line card state; + */ +struct mlxreg_lc { + struct device *dev; + struct mutex lock; /* line card access lock */ + void *par_regmap; + struct mlxreg_core_data *data; + struct mlxreg_core_platform_data *io_data; + struct mlxreg_core_platform_data *led_data; + struct mlxcpld_mux_plat_data *mux_data; + struct platform_device *led; + struct platform_device *io_regs; + struct i2c_board_info *mux_brdinfo; + struct platform_device *mux; + struct mlxreg_hotplug_device *aux_devs; + int aux_devs_num; + struct mlxreg_hotplug_device *main_devs; + int main_devs_num; + enum mlxreg_lc_state state; +}; + +static bool mlxreg_lc_writeable_reg(struct device *dev, unsigned int reg) +{ + switch (reg) { + case MLXREG_LC_REG_LED1_OFFSET: + case MLXREG_LC_REG_GP0_OFFSET: + case MLXREG_LC_REG_FIELD_UPGRADE: + case MLXREG_LC_CHANNEL_I2C_REG: + return true; + } + return false; +} + +static bool mlxreg_lc_readable_reg(struct device *dev, unsigned int reg) +{ + switch (reg) { + case MLXREG_LC_REG_CPLD1_VER_OFFSET: + case MLXREG_LC_REG_FPGA1_VER_OFFSET: + case MLXREG_LC_REG_CPLD1_PN_OFFSET: + case MLXREG_LC_REG_FPGA1_PN_OFFSET: + case MLXREG_LC_REG_RESET_CAUSE_OFFSET: + case MLXREG_LC_REG_LED1_OFFSET: + case MLXREG_LC_REG_GP0_OFFSET: + case MLXREG_LC_REG_FIELD_UPGRADE: + case MLXREG_LC_CHANNEL_I2C_REG: + case MLXREG_LC_REG_CPLD1_MVER_OFFSET: + case MLXREG_LC_REG_FPGA1_MVER_OFFSET: + case MLXREG_LC_REG_MAX_POWER_OFFSET: + case MLXREG_LC_REG_CONFIG_OFFSET: + return true; + } + return false; +} + +static bool mlxreg_lc_volatile_reg(struct device *dev, unsigned int reg) +{ + switch (reg) { + case MLXREG_LC_REG_CPLD1_VER_OFFSET: + case MLXREG_LC_REG_FPGA1_VER_OFFSET: + case MLXREG_LC_REG_CPLD1_PN_OFFSET: + case MLXREG_LC_REG_FPGA1_PN_OFFSET: + case MLXREG_LC_REG_RESET_CAUSE_OFFSET: + case MLXREG_LC_REG_LED1_OFFSET: + case MLXREG_LC_REG_GP0_OFFSET: + case MLXREG_LC_REG_FIELD_UPGRADE: + case MLXREG_LC_CHANNEL_I2C_REG: + case MLXREG_LC_REG_CPLD1_MVER_OFFSET: + case MLXREG_LC_REG_FPGA1_MVER_OFFSET: + case MLXREG_LC_REG_MAX_POWER_OFFSET: + case MLXREG_LC_REG_CONFIG_OFFSET: + return true; + } + return false; +} + +static const struct reg_default mlxreg_lc_regmap_default[] = { + { MLXREG_LC_CHANNEL_I2C_REG, 0x00 }, +}; + +/* Configuration for the register map of a device with 2 bytes address space. */ +static const struct regmap_config mlxreg_lc_regmap_conf = { + .reg_bits = 16, + .val_bits = 8, + .max_register = MLXREG_LC_REG_MAX, + .cache_type = REGCACHE_FLAT, + .writeable_reg = mlxreg_lc_writeable_reg, + .readable_reg = mlxreg_lc_readable_reg, + .volatile_reg = mlxreg_lc_volatile_reg, + .reg_defaults = mlxreg_lc_regmap_default, + .num_reg_defaults = ARRAY_SIZE(mlxreg_lc_regmap_default), +}; + +/* Default channels vector. + * It contains only the channels, which physically connected to the devices, + * empty channels are skipped. + */ +static int mlxreg_lc_chan[] = { + 0x04, 0x05, 0x06, 0x07, 0x08, 0x10, 0x20, 0x21, 0x22, 0x23, 0x40, 0x41, + 0x42, 0x43, 0x44, 0x45, 0x46, 0x47, 0x48, 0x49, 0x4a, 0x4b, 0x4c, 0x4d, + 0x4e, 0x4f +}; + +/* Defaul mux configuration. */ +static struct mlxcpld_mux_plat_data mlxreg_lc_mux_data[] = { + { + .chan_ids = mlxreg_lc_chan, + .num_adaps = ARRAY_SIZE(mlxreg_lc_chan), + .sel_reg_addr = MLXREG_LC_CHANNEL_I2C_REG, + .reg_size = 2, + }, +}; + +/* Defaul mux board info. */ +static struct i2c_board_info mlxreg_lc_mux_brdinfo = { + I2C_BOARD_INFO("i2c-mux-mlxcpld", 0x32), +}; + +/* Line card default auxiliary power static devices. */ +static struct i2c_board_info mlxreg_lc_aux_pwr_devices[] = { + { + I2C_BOARD_INFO("24c32", 0x51), + }, + { + I2C_BOARD_INFO("24c32", 0x51), + }, +}; + +/* Line card default auxiliary power board info. */ +static struct mlxreg_hotplug_device mlxreg_lc_aux_pwr_brdinfo[] = { + { + .brdinfo = &mlxreg_lc_aux_pwr_devices[0], + .nr = 3, + }, + { + .brdinfo = &mlxreg_lc_aux_pwr_devices[1], + .nr = 4, + }, +}; + +/* Line card default main power static devices. */ +static struct i2c_board_info mlxreg_lc_main_pwr_devices[] = { + { + I2C_BOARD_INFO("mp2975", 0x62), + }, + { + I2C_BOARD_INFO("mp2975", 0x64), + }, + { + I2C_BOARD_INFO("max11603", 0x6d), + }, + { + I2C_BOARD_INFO("lm25066", 0x15), + }, +}; + +/* Line card default main power board info. */ +static struct mlxreg_hotplug_device mlxreg_lc_main_pwr_brdinfo[] = { + { + .brdinfo = &mlxreg_lc_main_pwr_devices[0], + .nr = 0, + }, + { + .brdinfo = &mlxreg_lc_main_pwr_devices[1], + .nr = 0, + }, + { + .brdinfo = &mlxreg_lc_main_pwr_devices[2], + .nr = 1, + }, + { + .brdinfo = &mlxreg_lc_main_pwr_devices[3], + .nr = 2, + }, +}; + +/* LED default data. */ +static struct mlxreg_core_data mlxreg_lc_led_data[] = { + { + .label = "status:green", + .reg = MLXREG_LC_REG_LED1_OFFSET, + .mask = GENMASK(7, 4), + }, + { + .label = "status:orange", + .reg = MLXREG_LC_REG_LED1_OFFSET, + .mask = GENMASK(7, 4), + }, +}; + +static struct mlxreg_core_platform_data mlxreg_lc_led = { + .identity = "pci", + .data = mlxreg_lc_led_data, + .counter = ARRAY_SIZE(mlxreg_lc_led_data), +}; + +/* Default register access data. */ +static struct mlxreg_core_data mlxreg_lc_io_data[] = { + { + .label = "cpld1_version", + .reg = MLXREG_LC_REG_CPLD1_VER_OFFSET, + .bit = GENMASK(7, 0), + .mode = 0444, + }, + { + .label = "fpga1_version", + .reg = MLXREG_LC_REG_FPGA1_VER_OFFSET, + .bit = GENMASK(7, 0), + .mode = 0444, + }, + { + .label = "cpld1_pn", + .reg = MLXREG_LC_REG_CPLD1_PN_OFFSET, + .bit = GENMASK(15, 0), + .mode = 0444, + .regnum = 2, + }, + { + .label = "fpga1_pn", + .reg = MLXREG_LC_REG_FPGA1_PN_OFFSET, + .bit = GENMASK(15, 0), + .mode = 0444, + .regnum = 2, + }, + { + .label = "cpld1_version_min", + .reg = MLXREG_LC_REG_CPLD1_MVER_OFFSET, + .bit = GENMASK(7, 0), + .mode = 0444, + }, + { + .label = "fpga1_version_min", + .reg = MLXREG_LC_REG_FPGA1_MVER_OFFSET, + .bit = GENMASK(7, 0), + .mode = 0444, + }, + { + .label = "reset_fpga_not_done", + .reg = MLXREG_LC_REG_RESET_CAUSE_OFFSET, + .mask = GENMASK(7, 0) & ~BIT(1), + .mode = 0444, + }, + { + .label = "reset_aux_pwr_or_ref", + .reg = MLXREG_LC_REG_RESET_CAUSE_OFFSET, + .mask = GENMASK(7, 0) & ~BIT(2), + .mode = 0444, + }, + { + .label = "reset_dc_dc_pwr_fail", + .reg = MLXREG_LC_REG_RESET_CAUSE_OFFSET, + .mask = GENMASK(7, 0) & ~BIT(3), + .mode = 0444, + }, + { + .label = "reset_from_chassis", + .reg = MLXREG_LC_REG_RESET_CAUSE_OFFSET, + .mask = GENMASK(7, 0) & ~BIT(4), + .mode = 0444, + }, + { + .label = "reset_pwr_off_from_chassis", + .reg = MLXREG_LC_REG_RESET_CAUSE_OFFSET, + .mask = GENMASK(7, 0) & ~BIT(5), + .mode = 0444, + }, + { + .label = "reset_line_card", + .reg = MLXREG_LC_REG_RESET_CAUSE_OFFSET, + .mask = GENMASK(7, 0) & ~BIT(6), + .mode = 0444, + }, + { + .label = "reset_line_card_pwr_en", + .reg = MLXREG_LC_REG_RESET_CAUSE_OFFSET, + .mask = GENMASK(7, 0) & ~BIT(7), + .mode = 0444, + }, + { + .label = "cpld_upgrade_en", + .reg = MLXREG_LC_REG_FIELD_UPGRADE, + .mask = GENMASK(7, 0) & ~BIT(0), + .mode = 0644, + .secured = 1, + }, + { + .label = "fpga_upgrade_en", + .reg = MLXREG_LC_REG_FIELD_UPGRADE, + .mask = GENMASK(7, 0) & ~BIT(1), + .mode = 0644, + .secured = 1, + }, + { + .label = "qsfp_pwr_en", + .reg = MLXREG_LC_REG_GP0_OFFSET, + .mask = GENMASK(7, 0) & ~BIT(0), + .mode = 0644, + }, + { + .label = "vpd_wp", + .reg = MLXREG_LC_REG_GP0_OFFSET, + .mask = GENMASK(7, 0) & ~BIT(3), + .mode = 0644, + .secured = 1, + }, + { + .label = "agb_spi_burn_en", + .reg = MLXREG_LC_REG_GP0_OFFSET, + .mask = GENMASK(7, 0) & ~BIT(5), + .mode = 0644, + .secured = 1, + }, + { + .label = "fpga_spi_burn_en", + .reg = MLXREG_LC_REG_GP0_OFFSET, + .mask = GENMASK(7, 0) & ~BIT(6), + .mode = 0644, + .secured = 1, + }, + { + .label = "max_power", + .reg = MLXREG_LC_REG_MAX_POWER_OFFSET, + .bit = GENMASK(15, 0), + .mode = 0444, + .regnum = 2, + }, + { + .label = "config", + .reg = MLXREG_LC_REG_CONFIG_OFFSET, + .bit = GENMASK(15, 0), + .mode = 0444, + .regnum = 2, + }, +}; + +static struct mlxreg_core_platform_data mlxreg_lc_regs_io = { + .data = mlxreg_lc_io_data, + .counter = ARRAY_SIZE(mlxreg_lc_io_data), +}; + +static int +mlxreg_lc_create_static_devices(struct mlxreg_lc *mlxreg_lc, struct mlxreg_hotplug_device *devs, + int size) +{ + struct mlxreg_hotplug_device *dev = devs; + int i, ret; + + /* Create static I2C device feeding by auxiliary or main power. */ + for (i = 0; i < size; i++, dev++) { + dev->client = i2c_new_client_device(dev->adapter, dev->brdinfo); + if (IS_ERR(dev->client)) { + dev_err(mlxreg_lc->dev, "Failed to create client %s at bus %d at addr 0x%02x\n", + dev->brdinfo->type, dev->nr, dev->brdinfo->addr); + + dev->adapter = NULL; + ret = PTR_ERR(dev->client); + goto fail_create_static_devices; + } + } + + return 0; + +fail_create_static_devices: + while (--i >= 0) { + dev = devs + i; + i2c_unregister_device(dev->client); + dev->client = NULL; + } + return ret; +} + +static void +mlxreg_lc_destroy_static_devices(struct mlxreg_lc *mlxreg_lc, struct mlxreg_hotplug_device *devs, + int size) +{ + struct mlxreg_hotplug_device *dev = devs; + int i; + + /* Destroy static I2C device feeding by auxiliary or main power. */ + for (i = 0; i < size; i++, dev++) { + if (dev->client) { + i2c_unregister_device(dev->client); + dev->client = NULL; + } + } +} + +static int mlxreg_lc_power_on_off(struct mlxreg_lc *mlxreg_lc, u8 action) +{ + u32 regval; + int err; + + err = regmap_read(mlxreg_lc->par_regmap, mlxreg_lc->data->reg_pwr, ®val); + if (err) + goto regmap_read_fail; + + if (action) + regval |= BIT(mlxreg_lc->data->slot - 1); + else + regval &= ~BIT(mlxreg_lc->data->slot - 1); + + err = regmap_write(mlxreg_lc->par_regmap, mlxreg_lc->data->reg_pwr, regval); + +regmap_read_fail: + return err; +} + +static int mlxreg_lc_enable_disable(struct mlxreg_lc *mlxreg_lc, bool action) +{ + u32 regval; + int err; + + /* + * Hardware holds the line card after powering on in the disabled state. Holding line card + * in disabled state protects access to the line components, like FPGA and gearboxes. + * Line card should be enabled in order to get it in operational state. Line card could be + * disabled for moving it to non-operational state. Enabling line card does not affect the + * line card which is already has been enabled. Disabling does not affect the disabled line + * card. + */ + err = regmap_read(mlxreg_lc->par_regmap, mlxreg_lc->data->reg_ena, ®val); + if (err) + goto regmap_read_fail; + + if (action) + regval |= BIT(mlxreg_lc->data->slot - 1); + else + regval &= ~BIT(mlxreg_lc->data->slot - 1); + + err = regmap_write(mlxreg_lc->par_regmap, mlxreg_lc->data->reg_ena, regval); + +regmap_read_fail: + return err; +} + +static int +mlxreg_lc_sn4800_c16_config_init(struct mlxreg_lc *mlxreg_lc, void *regmap, + struct mlxreg_core_data *data) +{ + struct device *dev = &data->hpdev.client->dev; + + /* Set line card configuration according to the type. */ + mlxreg_lc->mux_data = mlxreg_lc_mux_data; + mlxreg_lc->io_data = &mlxreg_lc_regs_io; + mlxreg_lc->led_data = &mlxreg_lc_led; + mlxreg_lc->mux_brdinfo = &mlxreg_lc_mux_brdinfo; + + mlxreg_lc->aux_devs = devm_kmemdup(dev, mlxreg_lc_aux_pwr_brdinfo, + sizeof(mlxreg_lc_aux_pwr_brdinfo), GFP_KERNEL); + if (!mlxreg_lc->aux_devs) + return -ENOMEM; + mlxreg_lc->aux_devs_num = ARRAY_SIZE(mlxreg_lc_aux_pwr_brdinfo); + mlxreg_lc->main_devs = devm_kmemdup(dev, mlxreg_lc_main_pwr_brdinfo, + sizeof(mlxreg_lc_main_pwr_brdinfo), GFP_KERNEL); + if (!mlxreg_lc->main_devs) + return -ENOMEM; + mlxreg_lc->main_devs_num = ARRAY_SIZE(mlxreg_lc_main_pwr_brdinfo); + + return 0; +} + +static void +mlxreg_lc_state_update(struct mlxreg_lc *mlxreg_lc, enum mlxreg_lc_state state, u8 action) +{ + if (action) + mlxreg_lc->state |= state; + else + mlxreg_lc->state &= ~state; +} + +static void +mlxreg_lc_state_update_locked(struct mlxreg_lc *mlxreg_lc, enum mlxreg_lc_state state, u8 action) +{ + mutex_lock(&mlxreg_lc->lock); + + if (action) + mlxreg_lc->state |= state; + else + mlxreg_lc->state &= ~state; + + mutex_unlock(&mlxreg_lc->lock); +} + +/* + * Callback is to be called from mlxreg-hotplug driver to notify about line card about received + * event. + */ +static int mlxreg_lc_event_handler(void *handle, enum mlxreg_hotplug_kind kind, u8 action) +{ + struct mlxreg_lc *mlxreg_lc = handle; + int err = 0; + + dev_info(mlxreg_lc->dev, "linecard#%d state %d event kind %d action %d\n", + mlxreg_lc->data->slot, mlxreg_lc->state, kind, action); + + mutex_lock(&mlxreg_lc->lock); + if (!(mlxreg_lc->state & MLXREG_LC_INITIALIZED)) + goto mlxreg_lc_non_initialzed_exit; + + switch (kind) { + case MLXREG_HOTPLUG_LC_SYNCED: + /* + * Synchronization event - hardware and firmware are synchronized. Power on/off + * line card - to allow/disallow main power source. + */ + mlxreg_lc_state_update(mlxreg_lc, MLXREG_LC_SYNCED, action); + /* Power line card if it is not powered yet. */ + if (!(mlxreg_lc->state & MLXREG_LC_POWERED) && action) { + err = mlxreg_lc_power_on_off(mlxreg_lc, 1); + if (err) + goto mlxreg_lc_power_on_off_fail; + } + /* In case line card is configured - enable it. */ + if (mlxreg_lc->state & MLXREG_LC_CONFIGURED && action) + err = mlxreg_lc_enable_disable(mlxreg_lc, 1); + break; + case MLXREG_HOTPLUG_LC_POWERED: + /* Power event - attach or de-attach line card device feeding by the main power. */ + if (action) { + /* Do not create devices, if line card is already powered. */ + if (mlxreg_lc->state & MLXREG_LC_POWERED) { + /* In case line card is configured - enable it. */ + if (mlxreg_lc->state & MLXREG_LC_CONFIGURED) + err = mlxreg_lc_enable_disable(mlxreg_lc, 1); + + goto mlxreg_lc_enable_disable_exit; + } + err = mlxreg_lc_create_static_devices(mlxreg_lc, mlxreg_lc->main_devs, + mlxreg_lc->main_devs_num); + if (err) + goto mlxreg_lc_create_static_devices_fail; + + /* In case line card is already in ready state - enable it. */ + if (mlxreg_lc->state & MLXREG_LC_CONFIGURED) + err = mlxreg_lc_enable_disable(mlxreg_lc, 1); + } else { + mlxreg_lc_destroy_static_devices(mlxreg_lc, mlxreg_lc->main_devs, + mlxreg_lc->main_devs_num); + } + mlxreg_lc_state_update(mlxreg_lc, MLXREG_LC_POWERED, action); + break; + case MLXREG_HOTPLUG_LC_READY: + /* + * Ready event – enable line card by releasing it from reset or disable it by put + * to reset state. + */ + err = mlxreg_lc_enable_disable(mlxreg_lc, !!action); + break; + case MLXREG_HOTPLUG_LC_THERMAL: + /* Thermal shutdown event – power off line card. */ + if (action) + err = mlxreg_lc_power_on_off(mlxreg_lc, 0); + break; + default: + break; + } + +mlxreg_lc_enable_disable_exit: +mlxreg_lc_power_on_off_fail: +mlxreg_lc_create_static_devices_fail: +mlxreg_lc_non_initialzed_exit: + mutex_unlock(&mlxreg_lc->lock); + + return err; +} + +/* + * Callback is to be called from i2c-mux-mlxcpld driver to indicate that all adapter devices has + * been created. + */ +static int mlxreg_lc_completion_notify(void *handle, struct i2c_adapter *parent, + struct i2c_adapter *adapters[]) +{ + struct mlxreg_hotplug_device *main_dev, *aux_dev; + struct mlxreg_lc *mlxreg_lc = handle; + u32 regval; + int i, err; + + /* Update I2C devices feeding by auxiliary power. */ + aux_dev = mlxreg_lc->aux_devs; + for (i = 0; i < mlxreg_lc->aux_devs_num; i++, aux_dev++) { + aux_dev->adapter = adapters[aux_dev->nr]; + aux_dev->nr = adapters[aux_dev->nr]->nr; + } + + err = mlxreg_lc_create_static_devices(mlxreg_lc, mlxreg_lc->aux_devs, + mlxreg_lc->aux_devs_num); + if (err) + return err; + + /* Update I2C devices feeding by main power. */ + main_dev = mlxreg_lc->main_devs; + for (i = 0; i < mlxreg_lc->main_devs_num; i++, main_dev++) { + main_dev->adapter = adapters[main_dev->nr]; + main_dev->nr = adapters[main_dev->nr]->nr; + } + + /* Verify if line card is powered. */ + err = regmap_read(mlxreg_lc->par_regmap, mlxreg_lc->data->reg_pwr, ®val); + if (err) + goto mlxreg_lc_regmap_read_power_fail; + + if (regval & mlxreg_lc->data->mask) { + err = mlxreg_lc_create_static_devices(mlxreg_lc, mlxreg_lc->main_devs, + mlxreg_lc->main_devs_num); + if (err) + goto mlxreg_lc_create_static_devices_failed; + + mlxreg_lc_state_update_locked(mlxreg_lc, MLXREG_LC_POWERED, 1); + } + + /* Verify if line card is synchronized. */ + err = regmap_read(mlxreg_lc->par_regmap, mlxreg_lc->data->reg_sync, ®val); + if (err) + goto mlxreg_lc_regmap_read_sync_fail; + + /* Power on line card if necessary. */ + if (regval & mlxreg_lc->data->mask) { + mlxreg_lc->state |= MLXREG_LC_SYNCED; + mlxreg_lc_state_update_locked(mlxreg_lc, MLXREG_LC_SYNCED, 1); + if (mlxreg_lc->state & ~MLXREG_LC_POWERED) { + err = mlxreg_lc_power_on_off(mlxreg_lc, 1); + if (err) + goto mlxreg_lc_regmap_power_on_off_fail; + } + } + + mlxreg_lc_state_update_locked(mlxreg_lc, MLXREG_LC_INITIALIZED, 1); + + return 0; + +mlxreg_lc_regmap_power_on_off_fail: +mlxreg_lc_regmap_read_sync_fail: + if (mlxreg_lc->state & MLXREG_LC_POWERED) + mlxreg_lc_destroy_static_devices(mlxreg_lc, mlxreg_lc->main_devs, + mlxreg_lc->main_devs_num); +mlxreg_lc_create_static_devices_failed: + mlxreg_lc_destroy_static_devices(mlxreg_lc, mlxreg_lc->aux_devs, mlxreg_lc->aux_devs_num); +mlxreg_lc_regmap_read_power_fail: + return err; +} + +static int +mlxreg_lc_config_init(struct mlxreg_lc *mlxreg_lc, void *regmap, + struct mlxreg_core_data *data) +{ + struct device *dev = &data->hpdev.client->dev; + int lsb, err; + u32 regval; + + /* Validate line card type. */ + err = regmap_read(regmap, MLXREG_LC_REG_CONFIG_OFFSET, &lsb); + err = (!err) ? regmap_read(regmap, MLXREG_LC_REG_CONFIG_OFFSET, ®val) : err; + if (err) + return err; + regval = (regval & GENMASK(7, 0)) << 8 | (lsb & GENMASK(7, 0)); + switch (regval) { + case MLXREG_LC_SN4800_C16: + err = mlxreg_lc_sn4800_c16_config_init(mlxreg_lc, regmap, data); + if (err) { + dev_err(dev, "Failed to config client %s at bus %d at addr 0x%02x\n", + data->hpdev.brdinfo->type, data->hpdev.nr, + data->hpdev.brdinfo->addr); + return err; + } + break; + default: + return -ENODEV; + } + + /* Create mux infrastructure. */ + mlxreg_lc->mux_data->handle = mlxreg_lc; + mlxreg_lc->mux_data->completion_notify = mlxreg_lc_completion_notify; + mlxreg_lc->mux_brdinfo->platform_data = mlxreg_lc->mux_data; + mlxreg_lc->mux = platform_device_register_resndata(dev, "i2c-mux-mlxcpld", data->hpdev.nr, + NULL, 0, mlxreg_lc->mux_data, + sizeof(*mlxreg_lc->mux_data)); + if (IS_ERR(mlxreg_lc->mux)) { + dev_err(dev, "Failed to create mux infra for client %s at bus %d at addr 0x%02x\n", + data->hpdev.brdinfo->type, data->hpdev.nr, data->hpdev.brdinfo->addr); + return PTR_ERR(mlxreg_lc->mux); + } + + /* Register IO access driver. */ + if (mlxreg_lc->io_data) { + mlxreg_lc->io_data->regmap = regmap; + mlxreg_lc->io_regs = + platform_device_register_resndata(dev, "mlxreg-io", data->hpdev.nr, NULL, 0, + mlxreg_lc->io_data, sizeof(*mlxreg_lc->io_data)); + if (IS_ERR(mlxreg_lc->io_regs)) { + dev_err(dev, "Failed to create regio for client %s at bus %d at addr 0x%02x\n", + data->hpdev.brdinfo->type, data->hpdev.nr, + data->hpdev.brdinfo->addr); + err = PTR_ERR(mlxreg_lc->io_regs); + goto fail_register_io; + } + } + + /* Register LED driver. */ + if (mlxreg_lc->led_data) { + mlxreg_lc->led_data->regmap = regmap; + mlxreg_lc->led = + platform_device_register_resndata(dev, "leds-mlxreg", data->hpdev.nr, NULL, 0, + mlxreg_lc->led_data, + sizeof(*mlxreg_lc->led_data)); + if (IS_ERR(mlxreg_lc->led)) { + dev_err(dev, "Failed to create LED objects for client %s at bus %d at addr 0x%02x\n", + data->hpdev.brdinfo->type, data->hpdev.nr, + data->hpdev.brdinfo->addr); + err = PTR_ERR(mlxreg_lc->led); + goto fail_register_led; + } + } + + return 0; + +fail_register_led: + if (mlxreg_lc->io_regs) + platform_device_unregister(mlxreg_lc->io_regs); +fail_register_io: + if (mlxreg_lc->mux) + platform_device_unregister(mlxreg_lc->mux); + + return err; +} + +static void mlxreg_lc_config_exit(struct mlxreg_lc *mlxreg_lc) +{ + /* Unregister LED driver. */ + if (mlxreg_lc->led) + platform_device_unregister(mlxreg_lc->led); + /* Unregister IO access driver. */ + if (mlxreg_lc->io_regs) + platform_device_unregister(mlxreg_lc->io_regs); + /* Remove mux infrastructure. */ + if (mlxreg_lc->mux) + platform_device_unregister(mlxreg_lc->mux); +} + +static int mlxreg_lc_probe(struct platform_device *pdev) +{ + struct mlxreg_core_hotplug_platform_data *par_pdata; + struct mlxreg_core_data *data; + struct mlxreg_lc *mlxreg_lc; + void *regmap; + int i, err; + + data = dev_get_platdata(&pdev->dev); + if (!data) + return -EINVAL; + + mlxreg_lc = devm_kzalloc(&pdev->dev, sizeof(*mlxreg_lc), GFP_KERNEL); + if (!mlxreg_lc) + return -ENOMEM; + + mutex_init(&mlxreg_lc->lock); + /* Set event notification callback. */ + data->notifier->user_handler = mlxreg_lc_event_handler; + data->notifier->handle = mlxreg_lc; + + data->hpdev.adapter = i2c_get_adapter(data->hpdev.nr); + if (!data->hpdev.adapter) { + dev_err(&pdev->dev, "Failed to get adapter for bus %d\n", + data->hpdev.nr); + err = -EFAULT; + goto i2c_get_adapter_fail; + } + + /* Create device at the top of line card I2C tree.*/ + data->hpdev.client = i2c_new_client_device(data->hpdev.adapter, + data->hpdev.brdinfo); + if (IS_ERR(data->hpdev.client)) { + dev_err(&pdev->dev, "Failed to create client %s at bus %d at addr 0x%02x\n", + data->hpdev.brdinfo->type, data->hpdev.nr, data->hpdev.brdinfo->addr); + err = PTR_ERR(data->hpdev.client); + goto i2c_new_device_fail; + } + + regmap = devm_regmap_init_i2c(data->hpdev.client, + &mlxreg_lc_regmap_conf); + if (IS_ERR(regmap)) { + dev_err(&pdev->dev, "Failed to create regmap for client %s at bus %d at addr 0x%02x\n", + data->hpdev.brdinfo->type, data->hpdev.nr, data->hpdev.brdinfo->addr); + err = PTR_ERR(regmap); + goto devm_regmap_init_i2c_fail; + } + + /* Set default registers. */ + for (i = 0; i < mlxreg_lc_regmap_conf.num_reg_defaults; i++) { + err = regmap_write(regmap, mlxreg_lc_regmap_default[i].reg, + mlxreg_lc_regmap_default[i].def); + if (err) { + dev_err(&pdev->dev, "Failed to set default regmap %d for client %s at bus %d at addr 0x%02x\n", + i, data->hpdev.brdinfo->type, data->hpdev.nr, + data->hpdev.brdinfo->addr); + goto regmap_write_fail; + } + } + + /* Sync registers with hardware. */ + regcache_mark_dirty(regmap); + err = regcache_sync(regmap); + if (err) { + dev_err(&pdev->dev, "Failed to sync regmap for client %s at bus %d at addr 0x%02x\n", + data->hpdev.brdinfo->type, data->hpdev.nr, data->hpdev.brdinfo->addr); + goto regcache_sync_fail; + } + + par_pdata = data->hpdev.brdinfo->platform_data; + mlxreg_lc->par_regmap = par_pdata->regmap; + mlxreg_lc->data = data; + mlxreg_lc->dev = &pdev->dev; + platform_set_drvdata(pdev, mlxreg_lc); + + /* Configure line card. */ + err = mlxreg_lc_config_init(mlxreg_lc, regmap, data); + if (err) + goto mlxreg_lc_config_init_fail; + + return 0; + +mlxreg_lc_config_init_fail: +regcache_sync_fail: +regmap_write_fail: +devm_regmap_init_i2c_fail: + i2c_unregister_device(data->hpdev.client); + data->hpdev.client = NULL; +i2c_new_device_fail: + i2c_put_adapter(data->hpdev.adapter); + data->hpdev.adapter = NULL; +i2c_get_adapter_fail: + /* Clear event notification callback and handle. */ + if (data->notifier) { + data->notifier->user_handler = NULL; + data->notifier->handle = NULL; + } + return err; +} + +static int mlxreg_lc_remove(struct platform_device *pdev) +{ + struct mlxreg_core_data *data = dev_get_platdata(&pdev->dev); + struct mlxreg_lc *mlxreg_lc = platform_get_drvdata(pdev); + + mlxreg_lc_state_update_locked(mlxreg_lc, MLXREG_LC_INITIALIZED, 0); + + /* + * Probing and removing are invoked by hotplug events raised upon line card insertion and + * removing. If probing procedure fails all data is cleared. However, hotplug event still + * will be raised on line card removing and activate removing procedure. In this case there + * is nothing to remove. + */ + if (!data->notifier || !data->notifier->handle) + return 0; + + /* Clear event notification callback and handle. */ + data->notifier->user_handler = NULL; + data->notifier->handle = NULL; + + /* Destroy static I2C device feeding by main power. */ + mlxreg_lc_destroy_static_devices(mlxreg_lc, mlxreg_lc->main_devs, + mlxreg_lc->main_devs_num); + /* Destroy static I2C device feeding by auxiliary power. */ + mlxreg_lc_destroy_static_devices(mlxreg_lc, mlxreg_lc->aux_devs, mlxreg_lc->aux_devs_num); + /* Unregister underlying drivers. */ + mlxreg_lc_config_exit(mlxreg_lc); + if (data->hpdev.client) { + i2c_unregister_device(data->hpdev.client); + data->hpdev.client = NULL; + i2c_put_adapter(data->hpdev.adapter); + data->hpdev.adapter = NULL; + } + + return 0; +} + +static struct platform_driver mlxreg_lc_driver = { + .probe = mlxreg_lc_probe, + .remove = mlxreg_lc_remove, + .driver = { + .name = "mlxreg-lc", + }, +}; + +module_platform_driver(mlxreg_lc_driver); + +MODULE_AUTHOR("Vadim Pasternak "); +MODULE_DESCRIPTION("Nvidia line card platform driver"); +MODULE_LICENSE("Dual BSD/GPL"); +MODULE_ALIAS("platform:mlxreg-lc"); -- cgit v1.2.3