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/irqchip/irq-wpcm450-aic.c | 162 ++++++++++++++++++++++++++++++++++++++ 1 file changed, 162 insertions(+) create mode 100644 drivers/irqchip/irq-wpcm450-aic.c (limited to 'drivers/irqchip/irq-wpcm450-aic.c') diff --git a/drivers/irqchip/irq-wpcm450-aic.c b/drivers/irqchip/irq-wpcm450-aic.c new file mode 100644 index 000000000..91df62a64 --- /dev/null +++ b/drivers/irqchip/irq-wpcm450-aic.c @@ -0,0 +1,162 @@ +// SPDX-License-Identifier: GPL-2.0-only +// Copyright 2021 Jonathan Neuschäfer + +#include +#include +#include +#include + +#include + +#define AIC_SCR(x) ((x)*4) /* Source control registers */ +#define AIC_GEN 0x84 /* Interrupt group enable control register */ +#define AIC_GRSR 0x88 /* Interrupt group raw status register */ +#define AIC_IRSR 0x100 /* Interrupt raw status register */ +#define AIC_IASR 0x104 /* Interrupt active status register */ +#define AIC_ISR 0x108 /* Interrupt status register */ +#define AIC_IPER 0x10c /* Interrupt priority encoding register */ +#define AIC_ISNR 0x110 /* Interrupt source number register */ +#define AIC_IMR 0x114 /* Interrupt mask register */ +#define AIC_OISR 0x118 /* Output interrupt status register */ +#define AIC_MECR 0x120 /* Mask enable command register */ +#define AIC_MDCR 0x124 /* Mask disable command register */ +#define AIC_SSCR 0x128 /* Source set command register */ +#define AIC_SCCR 0x12c /* Source clear command register */ +#define AIC_EOSCR 0x130 /* End of service command register */ + +#define AIC_SCR_SRCTYPE_LOW_LEVEL (0 << 6) +#define AIC_SCR_SRCTYPE_HIGH_LEVEL (1 << 6) +#define AIC_SCR_SRCTYPE_NEG_EDGE (2 << 6) +#define AIC_SCR_SRCTYPE_POS_EDGE (3 << 6) +#define AIC_SCR_PRIORITY(x) (x) +#define AIC_SCR_PRIORITY_MASK 0x7 + +#define AIC_NUM_IRQS 32 + +struct wpcm450_aic { + void __iomem *regs; + struct irq_domain *domain; +}; + +static struct wpcm450_aic *aic; + +static void wpcm450_aic_init_hw(void) +{ + int i; + + /* Disable (mask) all interrupts */ + writel(0xffffffff, aic->regs + AIC_MDCR); + + /* + * Make sure the interrupt controller is ready to serve new interrupts. + * Reading from IPER indicates that the nIRQ signal may be deasserted, + * and writing to EOSCR indicates that interrupt handling has finished. + */ + readl(aic->regs + AIC_IPER); + writel(0, aic->regs + AIC_EOSCR); + + /* Initialize trigger mode and priority of each interrupt source */ + for (i = 0; i < AIC_NUM_IRQS; i++) + writel(AIC_SCR_SRCTYPE_HIGH_LEVEL | AIC_SCR_PRIORITY(7), + aic->regs + AIC_SCR(i)); +} + +static void __exception_irq_entry wpcm450_aic_handle_irq(struct pt_regs *regs) +{ + int hwirq; + + /* Determine the interrupt source */ + /* Read IPER to signal that nIRQ can be de-asserted */ + hwirq = readl(aic->regs + AIC_IPER) / 4; + + generic_handle_domain_irq(aic->domain, hwirq); +} + +static void wpcm450_aic_eoi(struct irq_data *d) +{ + /* Signal end-of-service */ + writel(0, aic->regs + AIC_EOSCR); +} + +static void wpcm450_aic_mask(struct irq_data *d) +{ + unsigned int mask = BIT(d->hwirq); + + /* Disable (mask) the interrupt */ + writel(mask, aic->regs + AIC_MDCR); +} + +static void wpcm450_aic_unmask(struct irq_data *d) +{ + unsigned int mask = BIT(d->hwirq); + + /* Enable (unmask) the interrupt */ + writel(mask, aic->regs + AIC_MECR); +} + +static int wpcm450_aic_set_type(struct irq_data *d, unsigned int flow_type) +{ + /* + * The hardware supports high/low level, as well as rising/falling edge + * modes, and the DT binding accommodates for that, but as long as + * other modes than high level mode are not used and can't be tested, + * they are rejected in this driver. + */ + if ((flow_type & IRQ_TYPE_SENSE_MASK) != IRQ_TYPE_LEVEL_HIGH) + return -EINVAL; + + return 0; +} + +static struct irq_chip wpcm450_aic_chip = { + .name = "wpcm450-aic", + .irq_eoi = wpcm450_aic_eoi, + .irq_mask = wpcm450_aic_mask, + .irq_unmask = wpcm450_aic_unmask, + .irq_set_type = wpcm450_aic_set_type, +}; + +static int wpcm450_aic_map(struct irq_domain *d, unsigned int irq, irq_hw_number_t hwirq) +{ + if (hwirq >= AIC_NUM_IRQS) + return -EPERM; + + irq_set_chip_and_handler(irq, &wpcm450_aic_chip, handle_fasteoi_irq); + irq_set_chip_data(irq, aic); + irq_set_probe(irq); + + return 0; +} + +static const struct irq_domain_ops wpcm450_aic_ops = { + .map = wpcm450_aic_map, + .xlate = irq_domain_xlate_twocell, +}; + +static int __init wpcm450_aic_of_init(struct device_node *node, + struct device_node *parent) +{ + if (parent) + return -EINVAL; + + aic = kzalloc(sizeof(*aic), GFP_KERNEL); + if (!aic) + return -ENOMEM; + + aic->regs = of_iomap(node, 0); + if (!aic->regs) { + pr_err("Failed to map WPCM450 AIC registers\n"); + kfree(aic); + return -ENOMEM; + } + + wpcm450_aic_init_hw(); + + set_handle_irq(wpcm450_aic_handle_irq); + + aic->domain = irq_domain_add_linear(node, AIC_NUM_IRQS, &wpcm450_aic_ops, aic); + + return 0; +} + +IRQCHIP_DECLARE(wpcm450_aic, "nuvoton,wpcm450-aic", wpcm450_aic_of_init); -- cgit v1.2.3