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/platforms/powernv/opal-imc.c | 325 ++++++++++++++++++++++++++++++ 1 file changed, 325 insertions(+) create mode 100644 arch/powerpc/platforms/powernv/opal-imc.c (limited to 'arch/powerpc/platforms/powernv/opal-imc.c') diff --git a/arch/powerpc/platforms/powernv/opal-imc.c b/arch/powerpc/platforms/powernv/opal-imc.c new file mode 100644 index 000000000..348a8cdae --- /dev/null +++ b/arch/powerpc/platforms/powernv/opal-imc.c @@ -0,0 +1,325 @@ +// SPDX-License-Identifier: GPL-2.0-or-later +/* + * OPAL IMC interface detection driver + * Supported on POWERNV platform + * + * Copyright (C) 2017 Madhavan Srinivasan, IBM Corporation. + * (C) 2017 Anju T Sudhakar, IBM Corporation. + * (C) 2017 Hemant K Shaw, IBM Corporation. + */ +#include +#include +#include +#include +#include +#include +#include +#include +#include +#include +#include + +static struct dentry *imc_debugfs_parent; + +/* Helpers to export imc command and mode via debugfs */ +static int imc_mem_get(void *data, u64 *val) +{ + *val = cpu_to_be64(*(u64 *)data); + return 0; +} + +static int imc_mem_set(void *data, u64 val) +{ + *(u64 *)data = cpu_to_be64(val); + return 0; +} +DEFINE_DEBUGFS_ATTRIBUTE(fops_imc_x64, imc_mem_get, imc_mem_set, "0x%016llx\n"); + +static void imc_debugfs_create_x64(const char *name, umode_t mode, + struct dentry *parent, u64 *value) +{ + debugfs_create_file_unsafe(name, mode, parent, value, &fops_imc_x64); +} + +/* + * export_imc_mode_and_cmd: Create a debugfs interface + * for imc_cmd and imc_mode + * for each node in the system. + * imc_mode and imc_cmd can be changed by echo into + * this interface. + */ +static void export_imc_mode_and_cmd(struct device_node *node, + struct imc_pmu *pmu_ptr) +{ + static u64 loc, *imc_mode_addr, *imc_cmd_addr; + char mode[16], cmd[16]; + u32 cb_offset; + struct imc_mem_info *ptr = pmu_ptr->mem_info; + + imc_debugfs_parent = debugfs_create_dir("imc", arch_debugfs_dir); + + if (of_property_read_u32(node, "cb_offset", &cb_offset)) + cb_offset = IMC_CNTL_BLK_OFFSET; + + while (ptr->vbase != NULL) { + loc = (u64)(ptr->vbase) + cb_offset; + imc_mode_addr = (u64 *)(loc + IMC_CNTL_BLK_MODE_OFFSET); + sprintf(mode, "imc_mode_%d", (u32)(ptr->id)); + imc_debugfs_create_x64(mode, 0600, imc_debugfs_parent, + imc_mode_addr); + + imc_cmd_addr = (u64 *)(loc + IMC_CNTL_BLK_CMD_OFFSET); + sprintf(cmd, "imc_cmd_%d", (u32)(ptr->id)); + imc_debugfs_create_x64(cmd, 0600, imc_debugfs_parent, + imc_cmd_addr); + ptr++; + } +} + +/* + * imc_get_mem_addr_nest: Function to get nest counter memory region + * for each chip + */ +static int imc_get_mem_addr_nest(struct device_node *node, + struct imc_pmu *pmu_ptr, + u32 offset) +{ + int nr_chips = 0, i; + u64 *base_addr_arr, baddr; + u32 *chipid_arr; + + nr_chips = of_property_count_u32_elems(node, "chip-id"); + if (nr_chips <= 0) + return -ENODEV; + + base_addr_arr = kcalloc(nr_chips, sizeof(*base_addr_arr), GFP_KERNEL); + if (!base_addr_arr) + return -ENOMEM; + + chipid_arr = kcalloc(nr_chips, sizeof(*chipid_arr), GFP_KERNEL); + if (!chipid_arr) { + kfree(base_addr_arr); + return -ENOMEM; + } + + if (of_property_read_u32_array(node, "chip-id", chipid_arr, nr_chips)) + goto error; + + if (of_property_read_u64_array(node, "base-addr", base_addr_arr, + nr_chips)) + goto error; + + pmu_ptr->mem_info = kcalloc(nr_chips + 1, sizeof(*pmu_ptr->mem_info), + GFP_KERNEL); + if (!pmu_ptr->mem_info) + goto error; + + for (i = 0; i < nr_chips; i++) { + pmu_ptr->mem_info[i].id = chipid_arr[i]; + baddr = base_addr_arr[i] + offset; + pmu_ptr->mem_info[i].vbase = phys_to_virt(baddr); + } + + pmu_ptr->imc_counter_mmaped = true; + kfree(base_addr_arr); + kfree(chipid_arr); + return 0; + +error: + kfree(base_addr_arr); + kfree(chipid_arr); + return -1; +} + +/* + * imc_pmu_create : Takes the parent device which is the pmu unit, pmu_index + * and domain as the inputs. + * Allocates memory for the struct imc_pmu, sets up its domain, size and offsets + */ +static struct imc_pmu *imc_pmu_create(struct device_node *parent, int pmu_index, int domain) +{ + int ret = 0; + struct imc_pmu *pmu_ptr; + u32 offset; + + /* Return for unknown domain */ + if (domain < 0) + return NULL; + + /* memory for pmu */ + pmu_ptr = kzalloc(sizeof(*pmu_ptr), GFP_KERNEL); + if (!pmu_ptr) + return NULL; + + /* Set the domain */ + pmu_ptr->domain = domain; + + ret = of_property_read_u32(parent, "size", &pmu_ptr->counter_mem_size); + if (ret) + goto free_pmu; + + if (!of_property_read_u32(parent, "offset", &offset)) { + if (imc_get_mem_addr_nest(parent, pmu_ptr, offset)) + goto free_pmu; + } + + /* Function to register IMC pmu */ + ret = init_imc_pmu(parent, pmu_ptr, pmu_index); + if (ret) { + pr_err("IMC PMU %s Register failed\n", pmu_ptr->pmu.name); + kfree(pmu_ptr->pmu.name); + if (pmu_ptr->domain == IMC_DOMAIN_NEST) + kfree(pmu_ptr->mem_info); + kfree(pmu_ptr); + return NULL; + } + + return pmu_ptr; + +free_pmu: + kfree(pmu_ptr); + return NULL; +} + +static void disable_nest_pmu_counters(void) +{ + int nid, cpu; + const struct cpumask *l_cpumask; + + cpus_read_lock(); + for_each_node_with_cpus(nid) { + l_cpumask = cpumask_of_node(nid); + cpu = cpumask_first_and(l_cpumask, cpu_online_mask); + if (cpu >= nr_cpu_ids) + continue; + opal_imc_counters_stop(OPAL_IMC_COUNTERS_NEST, + get_hard_smp_processor_id(cpu)); + } + cpus_read_unlock(); +} + +static void disable_core_pmu_counters(void) +{ + int cpu, rc; + + cpus_read_lock(); + /* Disable the IMC Core functions */ + for_each_online_cpu(cpu) { + if (cpu_first_thread_sibling(cpu) != cpu) + continue; + rc = opal_imc_counters_stop(OPAL_IMC_COUNTERS_CORE, + get_hard_smp_processor_id(cpu)); + if (rc) + pr_err("%s: Failed to stop Core (cpu = %d)\n", + __func__, cpu); + } + cpus_read_unlock(); +} + +int get_max_nest_dev(void) +{ + struct device_node *node; + u32 pmu_units = 0, type; + + for_each_compatible_node(node, NULL, IMC_DTB_UNIT_COMPAT) { + if (of_property_read_u32(node, "type", &type)) + continue; + + if (type == IMC_TYPE_CHIP) + pmu_units++; + } + + return pmu_units; +} + +static int opal_imc_counters_probe(struct platform_device *pdev) +{ + struct device_node *imc_dev = pdev->dev.of_node; + struct imc_pmu *pmu; + int pmu_count = 0, domain; + bool core_imc_reg = false, thread_imc_reg = false; + u32 type; + + /* + * Check whether this is kdump kernel. If yes, force the engines to + * stop and return. + */ + if (is_kdump_kernel()) { + disable_nest_pmu_counters(); + disable_core_pmu_counters(); + return -ENODEV; + } + + for_each_compatible_node(imc_dev, NULL, IMC_DTB_UNIT_COMPAT) { + pmu = NULL; + if (of_property_read_u32(imc_dev, "type", &type)) { + pr_warn("IMC Device without type property\n"); + continue; + } + + switch (type) { + case IMC_TYPE_CHIP: + domain = IMC_DOMAIN_NEST; + break; + case IMC_TYPE_CORE: + domain =IMC_DOMAIN_CORE; + break; + case IMC_TYPE_THREAD: + domain = IMC_DOMAIN_THREAD; + break; + case IMC_TYPE_TRACE: + domain = IMC_DOMAIN_TRACE; + break; + default: + pr_warn("IMC Unknown Device type \n"); + domain = -1; + break; + } + + pmu = imc_pmu_create(imc_dev, pmu_count, domain); + if (pmu != NULL) { + if (domain == IMC_DOMAIN_NEST) { + if (!imc_debugfs_parent) + export_imc_mode_and_cmd(imc_dev, pmu); + pmu_count++; + } + if (domain == IMC_DOMAIN_CORE) + core_imc_reg = true; + if (domain == IMC_DOMAIN_THREAD) + thread_imc_reg = true; + } + } + + /* If core imc is not registered, unregister thread-imc */ + if (!core_imc_reg && thread_imc_reg) + unregister_thread_imc(); + + return 0; +} + +static void opal_imc_counters_shutdown(struct platform_device *pdev) +{ + /* + * Function only stops the engines which is bare minimum. + * TODO: Need to handle proper memory cleanup and pmu + * unregister. + */ + disable_nest_pmu_counters(); + disable_core_pmu_counters(); +} + +static const struct of_device_id opal_imc_match[] = { + { .compatible = IMC_DTB_COMPAT }, + {}, +}; + +static struct platform_driver opal_imc_driver = { + .driver = { + .name = "opal-imc-counters", + .of_match_table = opal_imc_match, + }, + .probe = opal_imc_counters_probe, + .shutdown = opal_imc_counters_shutdown, +}; + +builtin_platform_driver(opal_imc_driver); -- cgit v1.2.3