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-mchp-eic.c | 280 +++++++++++++++++++++++++++++++++++++++++ 1 file changed, 280 insertions(+) create mode 100644 drivers/irqchip/irq-mchp-eic.c (limited to 'drivers/irqchip/irq-mchp-eic.c') diff --git a/drivers/irqchip/irq-mchp-eic.c b/drivers/irqchip/irq-mchp-eic.c new file mode 100644 index 000000000..c726a1983 --- /dev/null +++ b/drivers/irqchip/irq-mchp-eic.c @@ -0,0 +1,280 @@ +// SPDX-License-Identifier: GPL-2.0-only +/* + * Microchip External Interrupt Controller driver + * + * Copyright (C) 2021 Microchip Technology Inc. and its subsidiaries + * + * Author: Claudiu Beznea + */ +#include +#include +#include +#include +#include +#include +#include + +#include + +#define MCHP_EIC_GFCS (0x0) +#define MCHP_EIC_SCFG(x) (0x4 + (x) * 0x4) +#define MCHP_EIC_SCFG_EN BIT(16) +#define MCHP_EIC_SCFG_LVL BIT(9) +#define MCHP_EIC_SCFG_POL BIT(8) + +#define MCHP_EIC_NIRQ (2) + +/* + * struct mchp_eic - EIC private data structure + * @base: base address + * @clk: peripheral clock + * @domain: irq domain + * @irqs: irqs b/w eic and gic + * @scfg: backup for scfg registers (necessary for backup and self-refresh mode) + * @wakeup_source: wakeup source mask + */ +struct mchp_eic { + void __iomem *base; + struct clk *clk; + struct irq_domain *domain; + u32 irqs[MCHP_EIC_NIRQ]; + u32 scfg[MCHP_EIC_NIRQ]; + u32 wakeup_source; +}; + +static struct mchp_eic *eic; + +static void mchp_eic_irq_mask(struct irq_data *d) +{ + unsigned int tmp; + + tmp = readl_relaxed(eic->base + MCHP_EIC_SCFG(d->hwirq)); + tmp &= ~MCHP_EIC_SCFG_EN; + writel_relaxed(tmp, eic->base + MCHP_EIC_SCFG(d->hwirq)); + + irq_chip_mask_parent(d); +} + +static void mchp_eic_irq_unmask(struct irq_data *d) +{ + unsigned int tmp; + + tmp = readl_relaxed(eic->base + MCHP_EIC_SCFG(d->hwirq)); + tmp |= MCHP_EIC_SCFG_EN; + writel_relaxed(tmp, eic->base + MCHP_EIC_SCFG(d->hwirq)); + + irq_chip_unmask_parent(d); +} + +static int mchp_eic_irq_set_type(struct irq_data *d, unsigned int type) +{ + unsigned int parent_irq_type; + unsigned int tmp; + + tmp = readl_relaxed(eic->base + MCHP_EIC_SCFG(d->hwirq)); + tmp &= ~(MCHP_EIC_SCFG_POL | MCHP_EIC_SCFG_LVL); + switch (type) { + case IRQ_TYPE_LEVEL_HIGH: + tmp |= MCHP_EIC_SCFG_POL | MCHP_EIC_SCFG_LVL; + parent_irq_type = IRQ_TYPE_LEVEL_HIGH; + break; + case IRQ_TYPE_LEVEL_LOW: + tmp |= MCHP_EIC_SCFG_LVL; + parent_irq_type = IRQ_TYPE_LEVEL_HIGH; + break; + case IRQ_TYPE_EDGE_RISING: + parent_irq_type = IRQ_TYPE_EDGE_RISING; + break; + case IRQ_TYPE_EDGE_FALLING: + tmp |= MCHP_EIC_SCFG_POL; + parent_irq_type = IRQ_TYPE_EDGE_RISING; + break; + default: + return -EINVAL; + } + + writel_relaxed(tmp, eic->base + MCHP_EIC_SCFG(d->hwirq)); + + return irq_chip_set_type_parent(d, parent_irq_type); +} + +static int mchp_eic_irq_set_wake(struct irq_data *d, unsigned int on) +{ + irq_set_irq_wake(eic->irqs[d->hwirq], on); + if (on) + eic->wakeup_source |= BIT(d->hwirq); + else + eic->wakeup_source &= ~BIT(d->hwirq); + + return 0; +} + +static int mchp_eic_irq_suspend(void) +{ + unsigned int hwirq; + + for (hwirq = 0; hwirq < MCHP_EIC_NIRQ; hwirq++) + eic->scfg[hwirq] = readl_relaxed(eic->base + + MCHP_EIC_SCFG(hwirq)); + + if (!eic->wakeup_source) + clk_disable_unprepare(eic->clk); + + return 0; +} + +static void mchp_eic_irq_resume(void) +{ + unsigned int hwirq; + + if (!eic->wakeup_source) + clk_prepare_enable(eic->clk); + + for (hwirq = 0; hwirq < MCHP_EIC_NIRQ; hwirq++) + writel_relaxed(eic->scfg[hwirq], eic->base + + MCHP_EIC_SCFG(hwirq)); +} + +static struct syscore_ops mchp_eic_syscore_ops = { + .suspend = mchp_eic_irq_suspend, + .resume = mchp_eic_irq_resume, +}; + +static struct irq_chip mchp_eic_chip = { + .name = "eic", + .flags = IRQCHIP_MASK_ON_SUSPEND | IRQCHIP_SET_TYPE_MASKED, + .irq_mask = mchp_eic_irq_mask, + .irq_unmask = mchp_eic_irq_unmask, + .irq_set_type = mchp_eic_irq_set_type, + .irq_ack = irq_chip_ack_parent, + .irq_eoi = irq_chip_eoi_parent, + .irq_retrigger = irq_chip_retrigger_hierarchy, + .irq_set_wake = mchp_eic_irq_set_wake, +}; + +static int mchp_eic_domain_alloc(struct irq_domain *domain, unsigned int virq, + unsigned int nr_irqs, void *data) +{ + struct irq_fwspec *fwspec = data; + struct irq_fwspec parent_fwspec; + irq_hw_number_t hwirq; + unsigned int type; + int ret; + + if (WARN_ON(nr_irqs != 1)) + return -EINVAL; + + ret = irq_domain_translate_twocell(domain, fwspec, &hwirq, &type); + if (ret || hwirq >= MCHP_EIC_NIRQ) + return ret; + + switch (type) { + case IRQ_TYPE_EDGE_RISING: + case IRQ_TYPE_LEVEL_HIGH: + break; + case IRQ_TYPE_EDGE_FALLING: + type = IRQ_TYPE_EDGE_RISING; + break; + case IRQ_TYPE_LEVEL_LOW: + type = IRQ_TYPE_LEVEL_HIGH; + break; + default: + return -EINVAL; + } + + irq_domain_set_hwirq_and_chip(domain, virq, hwirq, &mchp_eic_chip, eic); + + parent_fwspec.fwnode = domain->parent->fwnode; + parent_fwspec.param_count = 3; + parent_fwspec.param[0] = GIC_SPI; + parent_fwspec.param[1] = eic->irqs[hwirq]; + parent_fwspec.param[2] = type; + + return irq_domain_alloc_irqs_parent(domain, virq, 1, &parent_fwspec); +} + +static const struct irq_domain_ops mchp_eic_domain_ops = { + .translate = irq_domain_translate_twocell, + .alloc = mchp_eic_domain_alloc, + .free = irq_domain_free_irqs_common, +}; + +static int mchp_eic_init(struct device_node *node, struct device_node *parent) +{ + struct irq_domain *parent_domain = NULL; + int ret, i; + + eic = kzalloc(sizeof(*eic), GFP_KERNEL); + if (!eic) + return -ENOMEM; + + eic->base = of_iomap(node, 0); + if (!eic->base) { + ret = -ENOMEM; + goto free; + } + + parent_domain = irq_find_host(parent); + if (!parent_domain) { + ret = -ENODEV; + goto unmap; + } + + eic->clk = of_clk_get_by_name(node, "pclk"); + if (IS_ERR(eic->clk)) { + ret = PTR_ERR(eic->clk); + goto unmap; + } + + ret = clk_prepare_enable(eic->clk); + if (ret) + goto unmap; + + for (i = 0; i < MCHP_EIC_NIRQ; i++) { + struct of_phandle_args irq; + + /* Disable it, if any. */ + writel_relaxed(0UL, eic->base + MCHP_EIC_SCFG(i)); + + ret = of_irq_parse_one(node, i, &irq); + if (ret) + goto clk_unprepare; + + if (WARN_ON(irq.args_count != 3)) { + ret = -EINVAL; + goto clk_unprepare; + } + + eic->irqs[i] = irq.args[1]; + } + + eic->domain = irq_domain_add_hierarchy(parent_domain, 0, MCHP_EIC_NIRQ, + node, &mchp_eic_domain_ops, eic); + if (!eic->domain) { + pr_err("%pOF: Failed to add domain\n", node); + ret = -ENODEV; + goto clk_unprepare; + } + + register_syscore_ops(&mchp_eic_syscore_ops); + + pr_info("%pOF: EIC registered, nr_irqs %u\n", node, MCHP_EIC_NIRQ); + + return 0; + +clk_unprepare: + clk_disable_unprepare(eic->clk); +unmap: + iounmap(eic->base); +free: + kfree(eic); + return ret; +} + +IRQCHIP_PLATFORM_DRIVER_BEGIN(mchp_eic) +IRQCHIP_MATCH("microchip,sama7g5-eic", mchp_eic_init) +IRQCHIP_PLATFORM_DRIVER_END(mchp_eic) + +MODULE_DESCRIPTION("Microchip External Interrupt Controller"); +MODULE_LICENSE("GPL v2"); +MODULE_AUTHOR("Claudiu Beznea "); -- cgit v1.2.3