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/powerpc/sysdev/xics/icp-native.c | 351 ++++++++++++++++++++++++++++++++++ 1 file changed, 351 insertions(+) create mode 100644 arch/powerpc/sysdev/xics/icp-native.c (limited to 'arch/powerpc/sysdev/xics/icp-native.c') diff --git a/arch/powerpc/sysdev/xics/icp-native.c b/arch/powerpc/sysdev/xics/icp-native.c new file mode 100644 index 000000000..edc17b6b1 --- /dev/null +++ b/arch/powerpc/sysdev/xics/icp-native.c @@ -0,0 +1,351 @@ +// SPDX-License-Identifier: GPL-2.0-or-later +/* + * Copyright 2011 IBM Corporation. + */ + +#include +#include +#include +#include +#include +#include +#include +#include +#include +#include +#include +#include + +#include +#include +#include +#include +#include +#include +#include + +struct icp_ipl { + union { + u32 word; + u8 bytes[4]; + } xirr_poll; + union { + u32 word; + u8 bytes[4]; + } xirr; + u32 dummy; + union { + u32 word; + u8 bytes[4]; + } qirr; + u32 link_a; + u32 link_b; + u32 link_c; +}; + +static struct icp_ipl __iomem *icp_native_regs[NR_CPUS]; + +static inline unsigned int icp_native_get_xirr(void) +{ + int cpu = smp_processor_id(); + unsigned int xirr; + + /* Handled an interrupt latched by KVM */ + xirr = kvmppc_get_xics_latch(); + if (xirr) + return xirr; + + return in_be32(&icp_native_regs[cpu]->xirr.word); +} + +static inline void icp_native_set_xirr(unsigned int value) +{ + int cpu = smp_processor_id(); + + out_be32(&icp_native_regs[cpu]->xirr.word, value); +} + +static inline void icp_native_set_cppr(u8 value) +{ + int cpu = smp_processor_id(); + + out_8(&icp_native_regs[cpu]->xirr.bytes[0], value); +} + +static inline void icp_native_set_qirr(int n_cpu, u8 value) +{ + out_8(&icp_native_regs[n_cpu]->qirr.bytes[0], value); +} + +static void icp_native_set_cpu_priority(unsigned char cppr) +{ + xics_set_base_cppr(cppr); + icp_native_set_cppr(cppr); + iosync(); +} + +void icp_native_eoi(struct irq_data *d) +{ + unsigned int hw_irq = (unsigned int)irqd_to_hwirq(d); + + iosync(); + icp_native_set_xirr((xics_pop_cppr() << 24) | hw_irq); +} + +static void icp_native_teardown_cpu(void) +{ + int cpu = smp_processor_id(); + + /* Clear any pending IPI */ + icp_native_set_qirr(cpu, 0xff); +} + +static void icp_native_flush_ipi(void) +{ + /* We take the ipi irq but and never return so we + * need to EOI the IPI, but want to leave our priority 0 + * + * should we check all the other interrupts too? + * should we be flagging idle loop instead? + * or creating some task to be scheduled? + */ + + icp_native_set_xirr((0x00 << 24) | XICS_IPI); +} + +static unsigned int icp_native_get_irq(void) +{ + unsigned int xirr = icp_native_get_xirr(); + unsigned int vec = xirr & 0x00ffffff; + unsigned int irq; + + if (vec == XICS_IRQ_SPURIOUS) + return 0; + + irq = irq_find_mapping(xics_host, vec); + if (likely(irq)) { + xics_push_cppr(vec); + return irq; + } + + /* We don't have a linux mapping, so have rtas mask it. */ + xics_mask_unknown_vec(vec); + + /* We might learn about it later, so EOI it */ + icp_native_set_xirr(xirr); + + return 0; +} + +#ifdef CONFIG_SMP + +static void icp_native_cause_ipi(int cpu) +{ + kvmppc_set_host_ipi(cpu); + icp_native_set_qirr(cpu, IPI_PRIORITY); +} + +#ifdef CONFIG_KVM_BOOK3S_HV_POSSIBLE +void icp_native_cause_ipi_rm(int cpu) +{ + /* + * Currently not used to send IPIs to another CPU + * on the same core. Only caller is KVM real mode. + * Need the physical address of the XICS to be + * previously saved in kvm_hstate in the paca. + */ + void __iomem *xics_phys; + + /* + * Just like the cause_ipi functions, it is required to + * include a full barrier before causing the IPI. + */ + xics_phys = paca_ptrs[cpu]->kvm_hstate.xics_phys; + mb(); + __raw_rm_writeb(IPI_PRIORITY, xics_phys + XICS_MFRR); +} +#endif + +/* + * Called when an interrupt is received on an off-line CPU to + * clear the interrupt, so that the CPU can go back to nap mode. + */ +void icp_native_flush_interrupt(void) +{ + unsigned int xirr = icp_native_get_xirr(); + unsigned int vec = xirr & 0x00ffffff; + + if (vec == XICS_IRQ_SPURIOUS) + return; + if (vec == XICS_IPI) { + /* Clear pending IPI */ + int cpu = smp_processor_id(); + kvmppc_clear_host_ipi(cpu); + icp_native_set_qirr(cpu, 0xff); + } else { + pr_err("XICS: hw interrupt 0x%x to offline cpu, disabling\n", + vec); + xics_mask_unknown_vec(vec); + } + /* EOI the interrupt */ + icp_native_set_xirr(xirr); +} + +void xics_wake_cpu(int cpu) +{ + icp_native_set_qirr(cpu, IPI_PRIORITY); +} +EXPORT_SYMBOL_GPL(xics_wake_cpu); + +static irqreturn_t icp_native_ipi_action(int irq, void *dev_id) +{ + int cpu = smp_processor_id(); + + kvmppc_clear_host_ipi(cpu); + icp_native_set_qirr(cpu, 0xff); + + return smp_ipi_demux(); +} + +#endif /* CONFIG_SMP */ + +static int __init icp_native_map_one_cpu(int hw_id, unsigned long addr, + unsigned long size) +{ + char *rname; + int i, cpu = -1; + + /* This may look gross but it's good enough for now, we don't quite + * have a hard -> linux processor id matching. + */ + for_each_possible_cpu(i) { + if (!cpu_present(i)) + continue; + if (hw_id == get_hard_smp_processor_id(i)) { + cpu = i; + break; + } + } + + /* Fail, skip that CPU. Don't print, it's normal, some XICS come up + * with way more entries in there than you have CPUs + */ + if (cpu == -1) + return 0; + + rname = kasprintf(GFP_KERNEL, "CPU %d [0x%x] Interrupt Presentation", + cpu, hw_id); + + if (!request_mem_region(addr, size, rname)) { + pr_warn("icp_native: Could not reserve ICP MMIO for CPU %d, interrupt server #0x%x\n", + cpu, hw_id); + return -EBUSY; + } + + icp_native_regs[cpu] = ioremap(addr, size); + kvmppc_set_xics_phys(cpu, addr); + if (!icp_native_regs[cpu]) { + pr_warn("icp_native: Failed ioremap for CPU %d, interrupt server #0x%x, addr %#lx\n", + cpu, hw_id, addr); + release_mem_region(addr, size); + return -ENOMEM; + } + return 0; +} + +static int __init icp_native_init_one_node(struct device_node *np, + unsigned int *indx) +{ + unsigned int ilen; + const __be32 *ireg; + int i; + int reg_tuple_size; + int num_servers = 0; + + /* This code does the theorically broken assumption that the interrupt + * server numbers are the same as the hard CPU numbers. + * This happens to be the case so far but we are playing with fire... + * should be fixed one of these days. -BenH. + */ + ireg = of_get_property(np, "ibm,interrupt-server-ranges", &ilen); + + /* Do that ever happen ? we'll know soon enough... but even good'old + * f80 does have that property .. + */ + WARN_ON((ireg == NULL) || (ilen != 2*sizeof(u32))); + + if (ireg) { + *indx = of_read_number(ireg, 1); + if (ilen >= 2*sizeof(u32)) + num_servers = of_read_number(ireg + 1, 1); + } + + ireg = of_get_property(np, "reg", &ilen); + if (!ireg) { + pr_err("icp_native: Can't find interrupt reg property"); + return -1; + } + + reg_tuple_size = (of_n_addr_cells(np) + of_n_size_cells(np)) * 4; + if (((ilen % reg_tuple_size) != 0) + || (num_servers && (num_servers != (ilen / reg_tuple_size)))) { + pr_err("icp_native: ICP reg len (%d) != num servers (%d)", + ilen / reg_tuple_size, num_servers); + return -1; + } + + for (i = 0; i < (ilen / reg_tuple_size); i++) { + struct resource r; + int err; + + err = of_address_to_resource(np, i, &r); + if (err) { + pr_err("icp_native: Could not translate ICP MMIO" + " for interrupt server 0x%x (%d)\n", *indx, err); + return -1; + } + + if (icp_native_map_one_cpu(*indx, r.start, resource_size(&r))) + return -1; + + (*indx)++; + } + return 0; +} + +static const struct icp_ops icp_native_ops = { + .get_irq = icp_native_get_irq, + .eoi = icp_native_eoi, + .set_priority = icp_native_set_cpu_priority, + .teardown_cpu = icp_native_teardown_cpu, + .flush_ipi = icp_native_flush_ipi, +#ifdef CONFIG_SMP + .ipi_action = icp_native_ipi_action, + .cause_ipi = icp_native_cause_ipi, +#endif +}; + +int __init icp_native_init(void) +{ + struct device_node *np; + u32 indx = 0; + int found = 0; + + for_each_compatible_node(np, NULL, "ibm,ppc-xicp") + if (icp_native_init_one_node(np, &indx) == 0) + found = 1; + if (!found) { + for_each_node_by_type(np, + "PowerPC-External-Interrupt-Presentation") { + if (icp_native_init_one_node(np, &indx) == 0) + found = 1; + } + } + + if (found == 0) + return -ENODEV; + + icp_ops = &icp_native_ops; + + return 0; +} -- cgit v1.2.3