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(). ... --- arch/mips/dec/kn01-berr.c | 196 ++++++++++++++++++++++++++++++++++++++++++++++ 1 file changed, 196 insertions(+) create mode 100644 arch/mips/dec/kn01-berr.c (limited to 'arch/mips/dec/kn01-berr.c') diff --git a/arch/mips/dec/kn01-berr.c b/arch/mips/dec/kn01-berr.c new file mode 100644 index 000000000..76efed7bc --- /dev/null +++ b/arch/mips/dec/kn01-berr.c @@ -0,0 +1,196 @@ +// SPDX-License-Identifier: GPL-2.0-or-later +/* + * Bus error event handling code for DECstation/DECsystem 3100 + * and 2100 (KN01) systems equipped with parity error detection + * logic. + * + * Copyright (c) 2005 Maciej W. Rozycki + */ + +#include +#include +#include +#include +#include + +#include +#include +#include +#include +#include +#include +#include + +#include + + +/* CP0 hazard avoidance. */ +#define BARRIER \ + __asm__ __volatile__( \ + ".set push\n\t" \ + ".set noreorder\n\t" \ + "nop\n\t" \ + ".set pop\n\t") + +/* + * Bits 7:0 of the Control Register are write-only -- the + * corresponding bits of the Status Register have a different + * meaning. Hence we use a cache. It speeds up things a bit + * as well. + * + * There is no default value -- it has to be initialized. + */ +u16 cached_kn01_csr; +static DEFINE_RAW_SPINLOCK(kn01_lock); + + +static inline void dec_kn01_be_ack(void) +{ + volatile u16 *csr = (void *)CKSEG1ADDR(KN01_SLOT_BASE + KN01_CSR); + unsigned long flags; + + raw_spin_lock_irqsave(&kn01_lock, flags); + + *csr = cached_kn01_csr | KN01_CSR_MEMERR; /* Clear bus IRQ. */ + iob(); + + raw_spin_unlock_irqrestore(&kn01_lock, flags); +} + +static int dec_kn01_be_backend(struct pt_regs *regs, int is_fixup, int invoker) +{ + volatile u32 *kn01_erraddr = (void *)CKSEG1ADDR(KN01_SLOT_BASE + + KN01_ERRADDR); + + static const char excstr[] = "exception"; + static const char intstr[] = "interrupt"; + static const char cpustr[] = "CPU"; + static const char mreadstr[] = "memory read"; + static const char readstr[] = "read"; + static const char writestr[] = "write"; + static const char timestr[] = "timeout"; + static const char paritystr[] = "parity error"; + + int data = regs->cp0_cause & 4; + unsigned int __user *pc = (unsigned int __user *)regs->cp0_epc + + ((regs->cp0_cause & CAUSEF_BD) != 0); + union mips_instruction insn; + unsigned long entrylo, offset; + long asid, entryhi, vaddr; + + const char *kind, *agent, *cycle, *event; + unsigned long address; + + u32 erraddr = *kn01_erraddr; + int action = MIPS_BE_FATAL; + + /* Ack ASAP, so that any subsequent errors get caught. */ + dec_kn01_be_ack(); + + kind = invoker ? intstr : excstr; + + agent = cpustr; + + if (invoker) + address = erraddr; + else { + /* Bloody hardware doesn't record the address for reads... */ + if (data) { + /* This never faults. */ + __get_user(insn.word, pc); + vaddr = regs->regs[insn.i_format.rs] + + insn.i_format.simmediate; + } else + vaddr = (long)pc; + if (KSEGX(vaddr) == CKSEG0 || KSEGX(vaddr) == CKSEG1) + address = CPHYSADDR(vaddr); + else { + /* Peek at what physical address the CPU used. */ + asid = read_c0_entryhi(); + entryhi = asid & (PAGE_SIZE - 1); + entryhi |= vaddr & ~(PAGE_SIZE - 1); + write_c0_entryhi(entryhi); + BARRIER; + tlb_probe(); + /* No need to check for presence. */ + tlb_read(); + entrylo = read_c0_entrylo0(); + write_c0_entryhi(asid); + offset = vaddr & (PAGE_SIZE - 1); + address = (entrylo & ~(PAGE_SIZE - 1)) | offset; + } + } + + /* Treat low 256MB as memory, high -- as I/O. */ + if (address < 0x10000000) { + cycle = mreadstr; + event = paritystr; + } else { + cycle = invoker ? writestr : readstr; + event = timestr; + } + + if (is_fixup) + action = MIPS_BE_FIXUP; + + if (action != MIPS_BE_FIXUP) + printk(KERN_ALERT "Bus error %s: %s %s %s at %#010lx\n", + kind, agent, cycle, event, address); + + return action; +} + +int dec_kn01_be_handler(struct pt_regs *regs, int is_fixup) +{ + return dec_kn01_be_backend(regs, is_fixup, 0); +} + +irqreturn_t dec_kn01_be_interrupt(int irq, void *dev_id) +{ + volatile u16 *csr = (void *)CKSEG1ADDR(KN01_SLOT_BASE + KN01_CSR); + struct pt_regs *regs = get_irq_regs(); + int action; + + if (!(*csr & KN01_CSR_MEMERR)) + return IRQ_NONE; /* Must have been video. */ + + action = dec_kn01_be_backend(regs, 0, 1); + + if (action == MIPS_BE_DISCARD) + return IRQ_HANDLED; + + /* + * FIXME: Find the affected processes and kill them, otherwise + * we must die. + * + * The interrupt is asynchronously delivered thus EPC and RA + * may be irrelevant, but are printed for a reference. + */ + printk(KERN_ALERT "Fatal bus interrupt, epc == %08lx, ra == %08lx\n", + regs->cp0_epc, regs->regs[31]); + die("Unrecoverable bus error", regs); +} + + +void __init dec_kn01_be_init(void) +{ + volatile u16 *csr = (void *)CKSEG1ADDR(KN01_SLOT_BASE + KN01_CSR); + unsigned long flags; + + raw_spin_lock_irqsave(&kn01_lock, flags); + + /* Preset write-only bits of the Control Register cache. */ + cached_kn01_csr = *csr; + cached_kn01_csr &= KN01_CSR_STATUS | KN01_CSR_PARDIS | KN01_CSR_TXDIS; + cached_kn01_csr |= KN01_CSR_LEDS; + + /* Enable parity error detection. */ + cached_kn01_csr &= ~KN01_CSR_PARDIS; + *csr = cached_kn01_csr; + iob(); + + raw_spin_unlock_irqrestore(&kn01_lock, flags); + + /* Clear any leftover errors from the firmware. */ + dec_kn01_be_ack(); +} -- cgit v1.2.3