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-siox.c | 269 +++++++++++++++++++++++++++++++++++++++++++++++ 1 file changed, 269 insertions(+) create mode 100644 drivers/gpio/gpio-siox.c (limited to 'drivers/gpio/gpio-siox.c') diff --git a/drivers/gpio/gpio-siox.c b/drivers/gpio/gpio-siox.c new file mode 100644 index 000000000..f8c5e9fc4 --- /dev/null +++ b/drivers/gpio/gpio-siox.c @@ -0,0 +1,269 @@ +// SPDX-License-Identifier: GPL-2.0 +/* + * Copyright (C) 2015-2018 Pengutronix, Uwe Kleine-König + */ + +#include +#include +#include +#include + +struct gpio_siox_ddata { + struct gpio_chip gchip; + struct irq_chip ichip; + struct mutex lock; + u8 setdata[1]; + u8 getdata[3]; + + raw_spinlock_t irqlock; + u32 irq_enable; + u32 irq_status; + u32 irq_type[20]; +}; + +/* + * Note that this callback only sets the value that is clocked out in the next + * cycle. + */ +static int gpio_siox_set_data(struct siox_device *sdevice, u8 status, u8 buf[]) +{ + struct gpio_siox_ddata *ddata = dev_get_drvdata(&sdevice->dev); + + mutex_lock(&ddata->lock); + buf[0] = ddata->setdata[0]; + mutex_unlock(&ddata->lock); + + return 0; +} + +static int gpio_siox_get_data(struct siox_device *sdevice, const u8 buf[]) +{ + struct gpio_siox_ddata *ddata = dev_get_drvdata(&sdevice->dev); + size_t offset; + u32 trigger; + + mutex_lock(&ddata->lock); + + raw_spin_lock_irq(&ddata->irqlock); + + for (offset = 0; offset < 12; ++offset) { + unsigned int bitpos = 11 - offset; + unsigned int gpiolevel = buf[bitpos / 8] & (1 << bitpos % 8); + unsigned int prev_level = + ddata->getdata[bitpos / 8] & (1 << (bitpos % 8)); + u32 irq_type = ddata->irq_type[offset]; + + if (gpiolevel) { + if ((irq_type & IRQ_TYPE_LEVEL_HIGH) || + ((irq_type & IRQ_TYPE_EDGE_RISING) && !prev_level)) + ddata->irq_status |= 1 << offset; + } else { + if ((irq_type & IRQ_TYPE_LEVEL_LOW) || + ((irq_type & IRQ_TYPE_EDGE_FALLING) && prev_level)) + ddata->irq_status |= 1 << offset; + } + } + + trigger = ddata->irq_status & ddata->irq_enable; + + raw_spin_unlock_irq(&ddata->irqlock); + + ddata->getdata[0] = buf[0]; + ddata->getdata[1] = buf[1]; + ddata->getdata[2] = buf[2]; + + mutex_unlock(&ddata->lock); + + for (offset = 0; offset < 12; ++offset) { + if (trigger & (1 << offset)) { + struct irq_domain *irqdomain = ddata->gchip.irq.domain; + unsigned int irq = irq_find_mapping(irqdomain, offset); + + /* + * Conceptually handle_nested_irq should call the flow + * handler of the irq chip. But it doesn't, so we have + * to clean the irq_status here. + */ + raw_spin_lock_irq(&ddata->irqlock); + ddata->irq_status &= ~(1 << offset); + raw_spin_unlock_irq(&ddata->irqlock); + + handle_nested_irq(irq); + } + } + + return 0; +} + +static void gpio_siox_irq_ack(struct irq_data *d) +{ + struct irq_chip *ic = irq_data_get_irq_chip(d); + struct gpio_siox_ddata *ddata = + container_of(ic, struct gpio_siox_ddata, ichip); + + raw_spin_lock(&ddata->irqlock); + ddata->irq_status &= ~(1 << d->hwirq); + raw_spin_unlock(&ddata->irqlock); +} + +static void gpio_siox_irq_mask(struct irq_data *d) +{ + struct irq_chip *ic = irq_data_get_irq_chip(d); + struct gpio_siox_ddata *ddata = + container_of(ic, struct gpio_siox_ddata, ichip); + + raw_spin_lock(&ddata->irqlock); + ddata->irq_enable &= ~(1 << d->hwirq); + raw_spin_unlock(&ddata->irqlock); +} + +static void gpio_siox_irq_unmask(struct irq_data *d) +{ + struct irq_chip *ic = irq_data_get_irq_chip(d); + struct gpio_siox_ddata *ddata = + container_of(ic, struct gpio_siox_ddata, ichip); + + raw_spin_lock(&ddata->irqlock); + ddata->irq_enable |= 1 << d->hwirq; + raw_spin_unlock(&ddata->irqlock); +} + +static int gpio_siox_irq_set_type(struct irq_data *d, u32 type) +{ + struct irq_chip *ic = irq_data_get_irq_chip(d); + struct gpio_siox_ddata *ddata = + container_of(ic, struct gpio_siox_ddata, ichip); + + raw_spin_lock(&ddata->irqlock); + ddata->irq_type[d->hwirq] = type; + raw_spin_unlock(&ddata->irqlock); + + return 0; +} + +static int gpio_siox_get(struct gpio_chip *chip, unsigned int offset) +{ + struct gpio_siox_ddata *ddata = + container_of(chip, struct gpio_siox_ddata, gchip); + int ret; + + mutex_lock(&ddata->lock); + + if (offset >= 12) { + unsigned int bitpos = 19 - offset; + + ret = ddata->setdata[0] & (1 << bitpos); + } else { + unsigned int bitpos = 11 - offset; + + ret = ddata->getdata[bitpos / 8] & (1 << (bitpos % 8)); + } + + mutex_unlock(&ddata->lock); + + return ret; +} + +static void gpio_siox_set(struct gpio_chip *chip, + unsigned int offset, int value) +{ + struct gpio_siox_ddata *ddata = + container_of(chip, struct gpio_siox_ddata, gchip); + u8 mask = 1 << (19 - offset); + + mutex_lock(&ddata->lock); + + if (value) + ddata->setdata[0] |= mask; + else + ddata->setdata[0] &= ~mask; + + mutex_unlock(&ddata->lock); +} + +static int gpio_siox_direction_input(struct gpio_chip *chip, + unsigned int offset) +{ + if (offset >= 12) + return -EINVAL; + + return 0; +} + +static int gpio_siox_direction_output(struct gpio_chip *chip, + unsigned int offset, int value) +{ + if (offset < 12) + return -EINVAL; + + gpio_siox_set(chip, offset, value); + return 0; +} + +static int gpio_siox_get_direction(struct gpio_chip *chip, unsigned int offset) +{ + if (offset < 12) + return GPIO_LINE_DIRECTION_IN; + else + return GPIO_LINE_DIRECTION_OUT; +} + +static int gpio_siox_probe(struct siox_device *sdevice) +{ + struct gpio_siox_ddata *ddata; + struct gpio_irq_chip *girq; + struct device *dev = &sdevice->dev; + int ret; + + ddata = devm_kzalloc(dev, sizeof(*ddata), GFP_KERNEL); + if (!ddata) + return -ENOMEM; + + dev_set_drvdata(dev, ddata); + + mutex_init(&ddata->lock); + raw_spin_lock_init(&ddata->irqlock); + + ddata->gchip.base = -1; + ddata->gchip.can_sleep = 1; + ddata->gchip.parent = dev; + ddata->gchip.owner = THIS_MODULE; + ddata->gchip.get = gpio_siox_get; + ddata->gchip.set = gpio_siox_set; + ddata->gchip.direction_input = gpio_siox_direction_input; + ddata->gchip.direction_output = gpio_siox_direction_output; + ddata->gchip.get_direction = gpio_siox_get_direction; + ddata->gchip.ngpio = 20; + + ddata->ichip.name = "siox-gpio"; + ddata->ichip.irq_ack = gpio_siox_irq_ack; + ddata->ichip.irq_mask = gpio_siox_irq_mask; + ddata->ichip.irq_unmask = gpio_siox_irq_unmask; + ddata->ichip.irq_set_type = gpio_siox_irq_set_type; + + girq = &ddata->gchip.irq; + girq->chip = &ddata->ichip; + girq->default_type = IRQ_TYPE_NONE; + girq->handler = handle_level_irq; + girq->threaded = true; + + ret = devm_gpiochip_add_data(dev, &ddata->gchip, NULL); + if (ret) + dev_err(dev, "Failed to register gpio chip (%d)\n", ret); + + return ret; +} + +static struct siox_driver gpio_siox_driver = { + .probe = gpio_siox_probe, + .set_data = gpio_siox_set_data, + .get_data = gpio_siox_get_data, + .driver = { + .name = "gpio-siox", + }, +}; +module_siox_driver(gpio_siox_driver); + +MODULE_AUTHOR("Uwe Kleine-Koenig "); +MODULE_DESCRIPTION("SIOX gpio driver"); +MODULE_LICENSE("GPL v2"); -- cgit v1.2.3