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/sh/intc/virq.c | 269 +++++++++++++++++++++++++++++++++++++++++++++++++ 1 file changed, 269 insertions(+) create mode 100644 drivers/sh/intc/virq.c (limited to 'drivers/sh/intc/virq.c') diff --git a/drivers/sh/intc/virq.c b/drivers/sh/intc/virq.c new file mode 100644 index 000000000..a638c3048 --- /dev/null +++ b/drivers/sh/intc/virq.c @@ -0,0 +1,269 @@ +/* + * Support for virtual IRQ subgroups. + * + * Copyright (C) 2010 Paul Mundt + * + * This file is subject to the terms and conditions of the GNU General Public + * License. See the file "COPYING" in the main directory of this archive + * for more details. + */ +#define pr_fmt(fmt) "intc: " fmt + +#include +#include +#include +#include +#include +#include +#include "internals.h" + +static struct intc_map_entry intc_irq_xlate[INTC_NR_IRQS]; + +struct intc_virq_list { + unsigned int irq; + struct intc_virq_list *next; +}; + +#define for_each_virq(entry, head) \ + for (entry = head; entry; entry = entry->next) + +/* + * Tags for the radix tree + */ +#define INTC_TAG_VIRQ_NEEDS_ALLOC 0 + +void intc_irq_xlate_set(unsigned int irq, intc_enum id, struct intc_desc_int *d) +{ + unsigned long flags; + + raw_spin_lock_irqsave(&intc_big_lock, flags); + intc_irq_xlate[irq].enum_id = id; + intc_irq_xlate[irq].desc = d; + raw_spin_unlock_irqrestore(&intc_big_lock, flags); +} + +struct intc_map_entry *intc_irq_xlate_get(unsigned int irq) +{ + return intc_irq_xlate + irq; +} + +int intc_irq_lookup(const char *chipname, intc_enum enum_id) +{ + struct intc_map_entry *ptr; + struct intc_desc_int *d; + int irq = -1; + + list_for_each_entry(d, &intc_list, list) { + int tagged; + + if (strcmp(d->chip.name, chipname) != 0) + continue; + + /* + * Catch early lookups for subgroup VIRQs that have not + * yet been allocated an IRQ. This already includes a + * fast-path out if the tree is untagged, so there is no + * need to explicitly test the root tree. + */ + tagged = radix_tree_tag_get(&d->tree, enum_id, + INTC_TAG_VIRQ_NEEDS_ALLOC); + if (unlikely(tagged)) + break; + + ptr = radix_tree_lookup(&d->tree, enum_id); + if (ptr) { + irq = ptr - intc_irq_xlate; + break; + } + } + + return irq; +} +EXPORT_SYMBOL_GPL(intc_irq_lookup); + +static int add_virq_to_pirq(unsigned int irq, unsigned int virq) +{ + struct intc_virq_list *entry; + struct intc_virq_list **last = NULL; + + /* scan for duplicates */ + for_each_virq(entry, irq_get_handler_data(irq)) { + if (entry->irq == virq) + return 0; + last = &entry->next; + } + + entry = kzalloc(sizeof(struct intc_virq_list), GFP_ATOMIC); + if (!entry) + return -ENOMEM; + + entry->irq = virq; + + if (last) + *last = entry; + else + irq_set_handler_data(irq, entry); + + return 0; +} + +static void intc_virq_handler(struct irq_desc *desc) +{ + unsigned int irq = irq_desc_get_irq(desc); + struct irq_data *data = irq_desc_get_irq_data(desc); + struct irq_chip *chip = irq_data_get_irq_chip(data); + struct intc_virq_list *entry, *vlist = irq_data_get_irq_handler_data(data); + struct intc_desc_int *d = get_intc_desc(irq); + + chip->irq_mask_ack(data); + + for_each_virq(entry, vlist) { + unsigned long addr, handle; + struct irq_desc *vdesc = irq_to_desc(entry->irq); + + if (vdesc) { + handle = (unsigned long)irq_desc_get_handler_data(vdesc); + addr = INTC_REG(d, _INTC_ADDR_E(handle), 0); + if (intc_reg_fns[_INTC_FN(handle)](addr, handle, 0)) + generic_handle_irq_desc(vdesc); + } + } + + chip->irq_unmask(data); +} + +static unsigned long __init intc_subgroup_data(struct intc_subgroup *subgroup, + struct intc_desc_int *d, + unsigned int index) +{ + unsigned int fn = REG_FN_TEST_BASE + (subgroup->reg_width >> 3) - 1; + + return _INTC_MK(fn, MODE_ENABLE_REG, intc_get_reg(d, subgroup->reg), + 0, 1, (subgroup->reg_width - 1) - index); +} + +static void __init intc_subgroup_init_one(struct intc_desc *desc, + struct intc_desc_int *d, + struct intc_subgroup *subgroup) +{ + struct intc_map_entry *mapped; + unsigned int pirq; + unsigned long flags; + int i; + + mapped = radix_tree_lookup(&d->tree, subgroup->parent_id); + if (!mapped) { + WARN_ON(1); + return; + } + + pirq = mapped - intc_irq_xlate; + + raw_spin_lock_irqsave(&d->lock, flags); + + for (i = 0; i < ARRAY_SIZE(subgroup->enum_ids); i++) { + struct intc_subgroup_entry *entry; + int err; + + if (!subgroup->enum_ids[i]) + continue; + + entry = kmalloc(sizeof(*entry), GFP_NOWAIT); + if (!entry) + break; + + entry->pirq = pirq; + entry->enum_id = subgroup->enum_ids[i]; + entry->handle = intc_subgroup_data(subgroup, d, i); + + err = radix_tree_insert(&d->tree, entry->enum_id, entry); + if (unlikely(err < 0)) + break; + + radix_tree_tag_set(&d->tree, entry->enum_id, + INTC_TAG_VIRQ_NEEDS_ALLOC); + } + + raw_spin_unlock_irqrestore(&d->lock, flags); +} + +void __init intc_subgroup_init(struct intc_desc *desc, struct intc_desc_int *d) +{ + int i; + + if (!desc->hw.subgroups) + return; + + for (i = 0; i < desc->hw.nr_subgroups; i++) + intc_subgroup_init_one(desc, d, desc->hw.subgroups + i); +} + +static void __init intc_subgroup_map(struct intc_desc_int *d) +{ + struct intc_subgroup_entry *entries[32]; + unsigned long flags; + unsigned int nr_found; + int i; + + raw_spin_lock_irqsave(&d->lock, flags); + +restart: + nr_found = radix_tree_gang_lookup_tag_slot(&d->tree, + (void ***)entries, 0, ARRAY_SIZE(entries), + INTC_TAG_VIRQ_NEEDS_ALLOC); + + for (i = 0; i < nr_found; i++) { + struct intc_subgroup_entry *entry; + int irq; + + entry = radix_tree_deref_slot((void **)entries[i]); + if (unlikely(!entry)) + continue; + if (radix_tree_deref_retry(entry)) + goto restart; + + irq = irq_alloc_desc(numa_node_id()); + if (unlikely(irq < 0)) { + pr_err("no more free IRQs, bailing..\n"); + break; + } + + activate_irq(irq); + + pr_info("Setting up a chained VIRQ from %d -> %d\n", + irq, entry->pirq); + + intc_irq_xlate_set(irq, entry->enum_id, d); + + irq_set_chip_and_handler_name(irq, irq_get_chip(entry->pirq), + handle_simple_irq, "virq"); + irq_set_chip_data(irq, irq_get_chip_data(entry->pirq)); + + irq_set_handler_data(irq, (void *)entry->handle); + + /* + * Set the virtual IRQ as non-threadable. + */ + irq_set_nothread(irq); + + /* Set handler data before installing the handler */ + add_virq_to_pirq(entry->pirq, irq); + irq_set_chained_handler(entry->pirq, intc_virq_handler); + + radix_tree_tag_clear(&d->tree, entry->enum_id, + INTC_TAG_VIRQ_NEEDS_ALLOC); + radix_tree_replace_slot(&d->tree, (void **)entries[i], + &intc_irq_xlate[irq]); + } + + raw_spin_unlock_irqrestore(&d->lock, flags); +} + +void __init intc_finalize(void) +{ + struct intc_desc_int *d; + + list_for_each_entry(d, &intc_list, list) + if (radix_tree_tagged(&d->tree, INTC_TAG_VIRQ_NEEDS_ALLOC)) + intc_subgroup_map(d); +} -- cgit v1.2.3