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/acpi/acpica/nssearch.c | 396 +++++++++++++++++++++++++++++++++++++++++ 1 file changed, 396 insertions(+) create mode 100644 drivers/acpi/acpica/nssearch.c (limited to 'drivers/acpi/acpica/nssearch.c') diff --git a/drivers/acpi/acpica/nssearch.c b/drivers/acpi/acpica/nssearch.c new file mode 100644 index 000000000..f594ab75a --- /dev/null +++ b/drivers/acpi/acpica/nssearch.c @@ -0,0 +1,396 @@ +// SPDX-License-Identifier: BSD-3-Clause OR GPL-2.0 +/******************************************************************************* + * + * Module Name: nssearch - Namespace search + * + ******************************************************************************/ + +#include +#include "accommon.h" +#include "acnamesp.h" + +#ifdef ACPI_ASL_COMPILER +#include "amlcode.h" +#endif + +#define _COMPONENT ACPI_NAMESPACE +ACPI_MODULE_NAME("nssearch") + +/* Local prototypes */ +static acpi_status +acpi_ns_search_parent_tree(u32 target_name, + struct acpi_namespace_node *node, + acpi_object_type type, + struct acpi_namespace_node **return_node); + +/******************************************************************************* + * + * FUNCTION: acpi_ns_search_one_scope + * + * PARAMETERS: target_name - Ascii ACPI name to search for + * parent_node - Starting node where search will begin + * type - Object type to match + * return_node - Where the matched Named obj is returned + * + * RETURN: Status + * + * DESCRIPTION: Search a single level of the namespace. Performs a + * simple search of the specified level, and does not add + * entries or search parents. + * + * + * Named object lists are built (and subsequently dumped) in the + * order in which the names are encountered during the namespace load; + * + * All namespace searching is linear in this implementation, but + * could be easily modified to support any improved search + * algorithm. However, the linear search was chosen for simplicity + * and because the trees are small and the other interpreter + * execution overhead is relatively high. + * + * Note: CPU execution analysis has shown that the AML interpreter spends + * a very small percentage of its time searching the namespace. Therefore, + * the linear search seems to be sufficient, as there would seem to be + * little value in improving the search. + * + ******************************************************************************/ + +acpi_status +acpi_ns_search_one_scope(u32 target_name, + struct acpi_namespace_node *parent_node, + acpi_object_type type, + struct acpi_namespace_node **return_node) +{ + struct acpi_namespace_node *node; + + ACPI_FUNCTION_TRACE(ns_search_one_scope); + +#ifdef ACPI_DEBUG_OUTPUT + if (ACPI_LV_NAMES & acpi_dbg_level) { + char *scope_name; + + scope_name = acpi_ns_get_normalized_pathname(parent_node, TRUE); + if (scope_name) { + ACPI_DEBUG_PRINT((ACPI_DB_NAMES, + "Searching %s (%p) For [%4.4s] (%s)\n", + scope_name, parent_node, + ACPI_CAST_PTR(char, &target_name), + acpi_ut_get_type_name(type))); + + ACPI_FREE(scope_name); + } + } +#endif + + /* + * Search for name at this namespace level, which is to say that we + * must search for the name among the children of this object + */ + node = parent_node->child; + while (node) { + + /* Check for match against the name */ + + if (node->name.integer == target_name) { + + /* Resolve a control method alias if any */ + + if (acpi_ns_get_type(node) == + ACPI_TYPE_LOCAL_METHOD_ALIAS) { + node = + ACPI_CAST_PTR(struct acpi_namespace_node, + node->object); + } + + /* Found matching entry */ + + ACPI_DEBUG_PRINT((ACPI_DB_NAMES, + "Name [%4.4s] (%s) %p found in scope [%4.4s] %p\n", + ACPI_CAST_PTR(char, &target_name), + acpi_ut_get_type_name(node->type), + node, + acpi_ut_get_node_name(parent_node), + parent_node)); + + *return_node = node; + return_ACPI_STATUS(AE_OK); + } + + /* Didn't match name, move on to the next peer object */ + + node = node->peer; + } + + /* Searched entire namespace level, not found */ + + ACPI_DEBUG_PRINT((ACPI_DB_NAMES, + "Name [%4.4s] (%s) not found in search in scope [%4.4s] " + "%p first child %p\n", + ACPI_CAST_PTR(char, &target_name), + acpi_ut_get_type_name(type), + acpi_ut_get_node_name(parent_node), parent_node, + parent_node->child)); + + return_ACPI_STATUS(AE_NOT_FOUND); +} + +/******************************************************************************* + * + * FUNCTION: acpi_ns_search_parent_tree + * + * PARAMETERS: target_name - Ascii ACPI name to search for + * node - Starting node where search will begin + * type - Object type to match + * return_node - Where the matched Node is returned + * + * RETURN: Status + * + * DESCRIPTION: Called when a name has not been found in the current namespace + * level. Before adding it or giving up, ACPI scope rules require + * searching enclosing scopes in cases identified by acpi_ns_local(). + * + * "A name is located by finding the matching name in the current + * name space, and then in the parent name space. If the parent + * name space does not contain the name, the search continues + * recursively until either the name is found or the name space + * does not have a parent (the root of the name space). This + * indicates that the name is not found" (From ACPI Specification, + * section 5.3) + * + ******************************************************************************/ + +static acpi_status +acpi_ns_search_parent_tree(u32 target_name, + struct acpi_namespace_node *node, + acpi_object_type type, + struct acpi_namespace_node **return_node) +{ + acpi_status status; + struct acpi_namespace_node *parent_node; + + ACPI_FUNCTION_TRACE(ns_search_parent_tree); + + parent_node = node->parent; + + /* + * If there is no parent (i.e., we are at the root) or type is "local", + * we won't be searching the parent tree. + */ + if (!parent_node) { + ACPI_DEBUG_PRINT((ACPI_DB_NAMES, "[%4.4s] has no parent\n", + ACPI_CAST_PTR(char, &target_name))); + return_ACPI_STATUS(AE_NOT_FOUND); + } + + if (acpi_ns_local(type)) { + ACPI_DEBUG_PRINT((ACPI_DB_NAMES, + "[%4.4s] type [%s] must be local to this scope (no parent search)\n", + ACPI_CAST_PTR(char, &target_name), + acpi_ut_get_type_name(type))); + return_ACPI_STATUS(AE_NOT_FOUND); + } + + /* Search the parent tree */ + + ACPI_DEBUG_PRINT((ACPI_DB_NAMES, + "Searching parent [%4.4s] for [%4.4s]\n", + acpi_ut_get_node_name(parent_node), + ACPI_CAST_PTR(char, &target_name))); + + /* Search parents until target is found or we have backed up to the root */ + + while (parent_node) { + /* + * Search parent scope. Use TYPE_ANY because we don't care about the + * object type at this point, we only care about the existence of + * the actual name we are searching for. Typechecking comes later. + */ + status = + acpi_ns_search_one_scope(target_name, parent_node, + ACPI_TYPE_ANY, return_node); + if (ACPI_SUCCESS(status)) { + return_ACPI_STATUS(status); + } + + /* Not found here, go up another level (until we reach the root) */ + + parent_node = parent_node->parent; + } + + /* Not found in parent tree */ + + return_ACPI_STATUS(AE_NOT_FOUND); +} + +/******************************************************************************* + * + * FUNCTION: acpi_ns_search_and_enter + * + * PARAMETERS: target_name - Ascii ACPI name to search for (4 chars) + * walk_state - Current state of the walk + * node - Starting node where search will begin + * interpreter_mode - Add names only in ACPI_MODE_LOAD_PASS_x. + * Otherwise,search only. + * type - Object type to match + * flags - Flags describing the search restrictions + * return_node - Where the Node is returned + * + * RETURN: Status + * + * DESCRIPTION: Search for a name segment in a single namespace level, + * optionally adding it if it is not found. If the passed + * Type is not Any and the type previously stored in the + * entry was Any (i.e. unknown), update the stored type. + * + * In ACPI_IMODE_EXECUTE, search only. + * In other modes, search and add if not found. + * + ******************************************************************************/ + +acpi_status +acpi_ns_search_and_enter(u32 target_name, + struct acpi_walk_state *walk_state, + struct acpi_namespace_node *node, + acpi_interpreter_mode interpreter_mode, + acpi_object_type type, + u32 flags, struct acpi_namespace_node **return_node) +{ + acpi_status status; + struct acpi_namespace_node *new_node; + + ACPI_FUNCTION_TRACE(ns_search_and_enter); + + /* Parameter validation */ + + if (!node || !target_name || !return_node) { + ACPI_ERROR((AE_INFO, + "Null parameter: Node %p Name 0x%X ReturnNode %p", + node, target_name, return_node)); + return_ACPI_STATUS(AE_BAD_PARAMETER); + } + + /* + * Name must consist of valid ACPI characters. We will repair the name if + * necessary because we don't want to abort because of this, but we want + * all namespace names to be printable. A warning message is appropriate. + * + * This issue came up because there are in fact machines that exhibit + * this problem, and we want to be able to enable ACPI support for them, + * even though there are a few bad names. + */ + acpi_ut_repair_name(ACPI_CAST_PTR(char, &target_name)); + + /* Try to find the name in the namespace level specified by the caller */ + + *return_node = ACPI_ENTRY_NOT_FOUND; + status = acpi_ns_search_one_scope(target_name, node, type, return_node); + if (status != AE_NOT_FOUND) { + /* + * If we found it AND the request specifies that a find is an error, + * return the error + */ + if (status == AE_OK) { + + /* The node was found in the namespace */ + + /* + * If the namespace override feature is enabled for this node, + * delete any existing attached sub-object and make the node + * look like a new node that is owned by the override table. + */ + if (flags & ACPI_NS_OVERRIDE_IF_FOUND) { + ACPI_DEBUG_PRINT((ACPI_DB_NAMES, + "Namespace override: %4.4s pass %u type %X Owner %X\n", + ACPI_CAST_PTR(char, + &target_name), + interpreter_mode, + (*return_node)->type, + walk_state->owner_id)); + + acpi_ns_delete_children(*return_node); + if (acpi_gbl_runtime_namespace_override) { + acpi_ut_remove_reference((*return_node)->object); + (*return_node)->object = NULL; + (*return_node)->owner_id = + walk_state->owner_id; + } else { + acpi_ns_remove_node(*return_node); + *return_node = ACPI_ENTRY_NOT_FOUND; + } + } + + /* Return an error if we don't expect to find the object */ + + else if (flags & ACPI_NS_ERROR_IF_FOUND) { + status = AE_ALREADY_EXISTS; + } + } +#ifdef ACPI_ASL_COMPILER + if (*return_node && (*return_node)->type == ACPI_TYPE_ANY) { + (*return_node)->flags |= ANOBJ_IS_EXTERNAL; + } +#endif + + /* Either found it or there was an error: finished either way */ + + return_ACPI_STATUS(status); + } + + /* + * The name was not found. If we are NOT performing the first pass + * (name entry) of loading the namespace, search the parent tree (all the + * way to the root if necessary.) We don't want to perform the parent + * search when the namespace is actually being loaded. We want to perform + * the search when namespace references are being resolved (load pass 2) + * and during the execution phase. + */ + if ((interpreter_mode != ACPI_IMODE_LOAD_PASS1) && + (flags & ACPI_NS_SEARCH_PARENT)) { + /* + * Not found at this level - search parent tree according to the + * ACPI specification + */ + status = + acpi_ns_search_parent_tree(target_name, node, type, + return_node); + if (ACPI_SUCCESS(status)) { + return_ACPI_STATUS(status); + } + } + + /* In execute mode, just search, never add names. Exit now */ + + if (interpreter_mode == ACPI_IMODE_EXECUTE) { + ACPI_DEBUG_PRINT((ACPI_DB_NAMES, + "%4.4s Not found in %p [Not adding]\n", + ACPI_CAST_PTR(char, &target_name), node)); + + return_ACPI_STATUS(AE_NOT_FOUND); + } + + /* Create the new named object */ + + new_node = acpi_ns_create_node(target_name); + if (!new_node) { + return_ACPI_STATUS(AE_NO_MEMORY); + } +#ifdef ACPI_ASL_COMPILER + + /* Node is an object defined by an External() statement */ + + if (flags & ACPI_NS_EXTERNAL || + (walk_state && walk_state->opcode == AML_SCOPE_OP)) { + new_node->flags |= ANOBJ_IS_EXTERNAL; + } +#endif + + if (flags & ACPI_NS_TEMPORARY) { + new_node->flags |= ANOBJ_TEMPORARY; + } + + /* Install the new object into the parent's list of children */ + + acpi_ns_install_node(walk_state, node, new_node, type); + *return_node = new_node; + return_ACPI_STATUS(AE_OK); +} -- cgit v1.2.3