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/gpio/gpio-hlwd.c | 302 +++++++++++++++++++++++++++++++++++++++++++++++ 1 file changed, 302 insertions(+) create mode 100644 drivers/gpio/gpio-hlwd.c (limited to 'drivers/gpio/gpio-hlwd.c') diff --git a/drivers/gpio/gpio-hlwd.c b/drivers/gpio/gpio-hlwd.c new file mode 100644 index 000000000..4e13e937f --- /dev/null +++ b/drivers/gpio/gpio-hlwd.c @@ -0,0 +1,302 @@ +// SPDX-License-Identifier: GPL-2.0+ +// Copyright (C) 2008-2009 The GameCube Linux Team +// Copyright (C) 2008,2009 Albert Herranz +// Copyright (C) 2017-2018 Jonathan Neuschäfer +// +// Nintendo Wii (Hollywood) GPIO driver + +#include +#include +#include +#include +#include +#include +#include + +/* + * Register names and offsets courtesy of WiiBrew: + * https://wiibrew.org/wiki/Hardware/Hollywood_GPIOs + * + * Note that for most registers, there are two versions: + * - HW_GPIOB_* Is always accessible by the Broadway PowerPC core, but does + * always give access to all GPIO lines + * - HW_GPIO_* Is only accessible by the Broadway PowerPC code if the memory + * firewall (AHBPROT) in the Hollywood chipset has been configured to allow + * such access. + * + * The ownership of each GPIO line can be configured in the HW_GPIO_OWNER + * register: A one bit configures the line for access via the HW_GPIOB_* + * registers, a zero bit indicates access via HW_GPIO_*. This driver uses + * HW_GPIOB_*. + */ +#define HW_GPIOB_OUT 0x00 +#define HW_GPIOB_DIR 0x04 +#define HW_GPIOB_IN 0x08 +#define HW_GPIOB_INTLVL 0x0c +#define HW_GPIOB_INTFLAG 0x10 +#define HW_GPIOB_INTMASK 0x14 +#define HW_GPIOB_INMIR 0x18 +#define HW_GPIO_ENABLE 0x1c +#define HW_GPIO_OUT 0x20 +#define HW_GPIO_DIR 0x24 +#define HW_GPIO_IN 0x28 +#define HW_GPIO_INTLVL 0x2c +#define HW_GPIO_INTFLAG 0x30 +#define HW_GPIO_INTMASK 0x34 +#define HW_GPIO_INMIR 0x38 +#define HW_GPIO_OWNER 0x3c + +struct hlwd_gpio { + struct gpio_chip gpioc; + struct irq_chip irqc; + void __iomem *regs; + int irq; + u32 edge_emulation; + u32 rising_edge, falling_edge; +}; + +static void hlwd_gpio_irqhandler(struct irq_desc *desc) +{ + struct hlwd_gpio *hlwd = + gpiochip_get_data(irq_desc_get_handler_data(desc)); + struct irq_chip *chip = irq_desc_get_chip(desc); + unsigned long flags; + unsigned long pending; + int hwirq; + u32 emulated_pending; + + raw_spin_lock_irqsave(&hlwd->gpioc.bgpio_lock, flags); + pending = ioread32be(hlwd->regs + HW_GPIOB_INTFLAG); + pending &= ioread32be(hlwd->regs + HW_GPIOB_INTMASK); + + /* Treat interrupts due to edge trigger emulation separately */ + emulated_pending = hlwd->edge_emulation & pending; + pending &= ~emulated_pending; + if (emulated_pending) { + u32 level, rising, falling; + + level = ioread32be(hlwd->regs + HW_GPIOB_INTLVL); + rising = level & emulated_pending; + falling = ~level & emulated_pending; + + /* Invert the levels */ + iowrite32be(level ^ emulated_pending, + hlwd->regs + HW_GPIOB_INTLVL); + + /* Ack all emulated-edge interrupts */ + iowrite32be(emulated_pending, hlwd->regs + HW_GPIOB_INTFLAG); + + /* Signal interrupts only on the correct edge */ + rising &= hlwd->rising_edge; + falling &= hlwd->falling_edge; + + /* Mark emulated interrupts as pending */ + pending |= rising | falling; + } + raw_spin_unlock_irqrestore(&hlwd->gpioc.bgpio_lock, flags); + + chained_irq_enter(chip, desc); + + for_each_set_bit(hwirq, &pending, 32) + generic_handle_domain_irq(hlwd->gpioc.irq.domain, hwirq); + + chained_irq_exit(chip, desc); +} + +static void hlwd_gpio_irq_ack(struct irq_data *data) +{ + struct hlwd_gpio *hlwd = + gpiochip_get_data(irq_data_get_irq_chip_data(data)); + + iowrite32be(BIT(data->hwirq), hlwd->regs + HW_GPIOB_INTFLAG); +} + +static void hlwd_gpio_irq_mask(struct irq_data *data) +{ + struct hlwd_gpio *hlwd = + gpiochip_get_data(irq_data_get_irq_chip_data(data)); + unsigned long flags; + u32 mask; + + raw_spin_lock_irqsave(&hlwd->gpioc.bgpio_lock, flags); + mask = ioread32be(hlwd->regs + HW_GPIOB_INTMASK); + mask &= ~BIT(data->hwirq); + iowrite32be(mask, hlwd->regs + HW_GPIOB_INTMASK); + raw_spin_unlock_irqrestore(&hlwd->gpioc.bgpio_lock, flags); +} + +static void hlwd_gpio_irq_unmask(struct irq_data *data) +{ + struct hlwd_gpio *hlwd = + gpiochip_get_data(irq_data_get_irq_chip_data(data)); + unsigned long flags; + u32 mask; + + raw_spin_lock_irqsave(&hlwd->gpioc.bgpio_lock, flags); + mask = ioread32be(hlwd->regs + HW_GPIOB_INTMASK); + mask |= BIT(data->hwirq); + iowrite32be(mask, hlwd->regs + HW_GPIOB_INTMASK); + raw_spin_unlock_irqrestore(&hlwd->gpioc.bgpio_lock, flags); +} + +static void hlwd_gpio_irq_enable(struct irq_data *data) +{ + hlwd_gpio_irq_ack(data); + hlwd_gpio_irq_unmask(data); +} + +static void hlwd_gpio_irq_setup_emulation(struct hlwd_gpio *hlwd, int hwirq, + unsigned int flow_type) +{ + u32 level, state; + + /* Set the trigger level to the inactive level */ + level = ioread32be(hlwd->regs + HW_GPIOB_INTLVL); + state = ioread32be(hlwd->regs + HW_GPIOB_IN) & BIT(hwirq); + level &= ~BIT(hwirq); + level |= state ^ BIT(hwirq); + iowrite32be(level, hlwd->regs + HW_GPIOB_INTLVL); + + hlwd->edge_emulation |= BIT(hwirq); + hlwd->rising_edge &= ~BIT(hwirq); + hlwd->falling_edge &= ~BIT(hwirq); + if (flow_type & IRQ_TYPE_EDGE_RISING) + hlwd->rising_edge |= BIT(hwirq); + if (flow_type & IRQ_TYPE_EDGE_FALLING) + hlwd->falling_edge |= BIT(hwirq); +} + +static int hlwd_gpio_irq_set_type(struct irq_data *data, unsigned int flow_type) +{ + struct hlwd_gpio *hlwd = + gpiochip_get_data(irq_data_get_irq_chip_data(data)); + unsigned long flags; + u32 level; + + raw_spin_lock_irqsave(&hlwd->gpioc.bgpio_lock, flags); + + hlwd->edge_emulation &= ~BIT(data->hwirq); + + switch (flow_type) { + case IRQ_TYPE_LEVEL_HIGH: + level = ioread32be(hlwd->regs + HW_GPIOB_INTLVL); + level |= BIT(data->hwirq); + iowrite32be(level, hlwd->regs + HW_GPIOB_INTLVL); + break; + case IRQ_TYPE_LEVEL_LOW: + level = ioread32be(hlwd->regs + HW_GPIOB_INTLVL); + level &= ~BIT(data->hwirq); + iowrite32be(level, hlwd->regs + HW_GPIOB_INTLVL); + break; + case IRQ_TYPE_EDGE_RISING: + case IRQ_TYPE_EDGE_FALLING: + case IRQ_TYPE_EDGE_BOTH: + hlwd_gpio_irq_setup_emulation(hlwd, data->hwirq, flow_type); + break; + default: + raw_spin_unlock_irqrestore(&hlwd->gpioc.bgpio_lock, flags); + return -EINVAL; + } + + raw_spin_unlock_irqrestore(&hlwd->gpioc.bgpio_lock, flags); + return 0; +} + +static int hlwd_gpio_probe(struct platform_device *pdev) +{ + struct hlwd_gpio *hlwd; + u32 ngpios; + int res; + + hlwd = devm_kzalloc(&pdev->dev, sizeof(*hlwd), GFP_KERNEL); + if (!hlwd) + return -ENOMEM; + + hlwd->regs = devm_platform_ioremap_resource(pdev, 0); + if (IS_ERR(hlwd->regs)) + return PTR_ERR(hlwd->regs); + + /* + * Claim all GPIOs using the OWNER register. This will not work on + * systems where the AHBPROT memory firewall hasn't been configured to + * permit PPC access to HW_GPIO_*. + * + * Note that this has to happen before bgpio_init reads the + * HW_GPIOB_OUT and HW_GPIOB_DIR, because otherwise it reads the wrong + * values. + */ + iowrite32be(0xffffffff, hlwd->regs + HW_GPIO_OWNER); + + res = bgpio_init(&hlwd->gpioc, &pdev->dev, 4, + hlwd->regs + HW_GPIOB_IN, hlwd->regs + HW_GPIOB_OUT, + NULL, hlwd->regs + HW_GPIOB_DIR, NULL, + BGPIOF_BIG_ENDIAN_BYTE_ORDER); + if (res < 0) { + dev_warn(&pdev->dev, "bgpio_init failed: %d\n", res); + return res; + } + + res = of_property_read_u32(pdev->dev.of_node, "ngpios", &ngpios); + if (res) + ngpios = 32; + hlwd->gpioc.ngpio = ngpios; + + /* Mask and ack all interrupts */ + iowrite32be(0, hlwd->regs + HW_GPIOB_INTMASK); + iowrite32be(0xffffffff, hlwd->regs + HW_GPIOB_INTFLAG); + + /* + * If this GPIO controller is not marked as an interrupt controller in + * the DT, skip interrupt support. + */ + if (of_property_read_bool(pdev->dev.of_node, "interrupt-controller")) { + struct gpio_irq_chip *girq; + + hlwd->irq = platform_get_irq(pdev, 0); + if (hlwd->irq < 0) { + dev_info(&pdev->dev, "platform_get_irq returned %d\n", + hlwd->irq); + return hlwd->irq; + } + + hlwd->irqc.name = dev_name(&pdev->dev); + hlwd->irqc.irq_mask = hlwd_gpio_irq_mask; + hlwd->irqc.irq_unmask = hlwd_gpio_irq_unmask; + hlwd->irqc.irq_enable = hlwd_gpio_irq_enable; + hlwd->irqc.irq_set_type = hlwd_gpio_irq_set_type; + + girq = &hlwd->gpioc.irq; + girq->chip = &hlwd->irqc; + girq->parent_handler = hlwd_gpio_irqhandler; + girq->num_parents = 1; + girq->parents = devm_kcalloc(&pdev->dev, 1, + sizeof(*girq->parents), + GFP_KERNEL); + if (!girq->parents) + return -ENOMEM; + girq->parents[0] = hlwd->irq; + girq->default_type = IRQ_TYPE_NONE; + girq->handler = handle_level_irq; + } + + return devm_gpiochip_add_data(&pdev->dev, &hlwd->gpioc, hlwd); +} + +static const struct of_device_id hlwd_gpio_match[] = { + { .compatible = "nintendo,hollywood-gpio", }, + {}, +}; +MODULE_DEVICE_TABLE(of, hlwd_gpio_match); + +static struct platform_driver hlwd_gpio_driver = { + .driver = { + .name = "gpio-hlwd", + .of_match_table = hlwd_gpio_match, + }, + .probe = hlwd_gpio_probe, +}; +module_platform_driver(hlwd_gpio_driver); + +MODULE_AUTHOR("Jonathan Neuschäfer "); +MODULE_DESCRIPTION("Nintendo Wii GPIO driver"); +MODULE_LICENSE("GPL"); -- cgit v1.2.3