Merge tag 'net-next-6.3' of git://git.kernel.org/pub/scm/linux/kernel/git/netdev/net-nextgrafted

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().
  ...

1 files changed, 731 insertions, 0 deletions

diff --git a/drivers/acpi/acpica/nsutils.c b/drivers/acpi/acpica/nsutils.c
new file mode 100644
index 000000000..ef531b145
--- /dev/null
+++ b/drivers/acpi/acpica/nsutils.c
@@ -0,0 +1,731 @@
+// SPDX-License-Identifier: BSD-3-Clause OR GPL-2.0
+/******************************************************************************
+ *
+ * Module Name: nsutils - Utilities for accessing ACPI namespace, accessing
+ *                        parents and siblings and Scope manipulation
+ *
+ * Copyright (C) 2000 - 2022, Intel Corp.
+ *
+ *****************************************************************************/
+
+#include <acpi/acpi.h>
+#include "accommon.h"
+#include "acnamesp.h"
+#include "amlcode.h"
+
+#define _COMPONENT          ACPI_NAMESPACE
+ACPI_MODULE_NAME("nsutils")
+
+/* Local prototypes */
+#ifdef ACPI_OBSOLETE_FUNCTIONS
+acpi_name acpi_ns_find_parent_name(struct acpi_namespace_node *node_to_search);
+#endif
+
+/*******************************************************************************
+ *
+ * FUNCTION:    acpi_ns_print_node_pathname
+ *
+ * PARAMETERS:  node            - Object
+ *              message         - Prefix message
+ *
+ * DESCRIPTION: Print an object's full namespace pathname
+ *              Manages allocation/freeing of a pathname buffer
+ *
+ ******************************************************************************/
+
+void
+acpi_ns_print_node_pathname(struct acpi_namespace_node *node,
+			    const char *message)
+{
+	struct acpi_buffer buffer;
+	acpi_status status;
+
+	if (!node) {
+		acpi_os_printf("[NULL NAME]");
+		return;
+	}
+
+	/* Convert handle to full pathname and print it (with supplied message) */
+
+	buffer.length = ACPI_ALLOCATE_LOCAL_BUFFER;
+
+	status = acpi_ns_handle_to_pathname(node, &buffer, TRUE);
+	if (ACPI_SUCCESS(status)) {
+		if (message) {
+			acpi_os_printf("%s ", message);
+		}
+
+		acpi_os_printf("%s", (char *)buffer.pointer);
+		ACPI_FREE(buffer.pointer);
+	}
+}
+
+/*******************************************************************************
+ *
+ * FUNCTION:    acpi_ns_get_type
+ *
+ * PARAMETERS:  node        - Parent Node to be examined
+ *
+ * RETURN:      Type field from Node whose handle is passed
+ *
+ * DESCRIPTION: Return the type of a Namespace node
+ *
+ ******************************************************************************/
+
+acpi_object_type acpi_ns_get_type(struct acpi_namespace_node * node)
+{
+	ACPI_FUNCTION_TRACE(ns_get_type);
+
+	if (!node) {
+		ACPI_WARNING((AE_INFO, "Null Node parameter"));
+		return_UINT8(ACPI_TYPE_ANY);
+	}
+
+	return_UINT8(node->type);
+}
+
+/*******************************************************************************
+ *
+ * FUNCTION:    acpi_ns_local
+ *
+ * PARAMETERS:  type        - A namespace object type
+ *
+ * RETURN:      LOCAL if names must be found locally in objects of the
+ *              passed type, 0 if enclosing scopes should be searched
+ *
+ * DESCRIPTION: Returns scope rule for the given object type.
+ *
+ ******************************************************************************/
+
+u32 acpi_ns_local(acpi_object_type type)
+{
+	ACPI_FUNCTION_TRACE(ns_local);
+
+	if (!acpi_ut_valid_object_type(type)) {
+
+		/* Type code out of range  */
+
+		ACPI_WARNING((AE_INFO, "Invalid Object Type 0x%X", type));
+		return_UINT32(ACPI_NS_NORMAL);
+	}
+
+	return_UINT32(acpi_gbl_ns_properties[type] & ACPI_NS_LOCAL);
+}
+
+/*******************************************************************************
+ *
+ * FUNCTION:    acpi_ns_get_internal_name_length
+ *
+ * PARAMETERS:  info            - Info struct initialized with the
+ *                                external name pointer.
+ *
+ * RETURN:      None
+ *
+ * DESCRIPTION: Calculate the length of the internal (AML) namestring
+ *              corresponding to the external (ASL) namestring.
+ *
+ ******************************************************************************/
+
+void acpi_ns_get_internal_name_length(struct acpi_namestring_info *info)
+{
+	const char *next_external_char;
+	u32 i;
+
+	ACPI_FUNCTION_ENTRY();
+
+	next_external_char = info->external_name;
+	info->num_carats = 0;
+	info->num_segments = 0;
+	info->fully_qualified = FALSE;
+
+	/*
+	 * For the internal name, the required length is 4 bytes per segment,
+	 * plus 1 each for root_prefix, multi_name_prefix_op, segment count,
+	 * trailing null (which is not really needed, but no there's harm in
+	 * putting it there)
+	 *
+	 * strlen() + 1 covers the first name_seg, which has no path separator
+	 */
+	if (ACPI_IS_ROOT_PREFIX(*next_external_char)) {
+		info->fully_qualified = TRUE;
+		next_external_char++;
+
+		/* Skip redundant root_prefix, like \\_SB.PCI0.SBRG.EC0 */
+
+		while (ACPI_IS_ROOT_PREFIX(*next_external_char)) {
+			next_external_char++;
+		}
+	} else {
+		/* Handle Carat prefixes */
+
+		while (ACPI_IS_PARENT_PREFIX(*next_external_char)) {
+			info->num_carats++;
+			next_external_char++;
+		}
+	}
+
+	/*
+	 * Determine the number of ACPI name "segments" by counting the number of
+	 * path separators within the string. Start with one segment since the
+	 * segment count is [(# separators) + 1], and zero separators is ok.
+	 */
+	if (*next_external_char) {
+		info->num_segments = 1;
+		for (i = 0; next_external_char[i]; i++) {
+			if (ACPI_IS_PATH_SEPARATOR(next_external_char[i])) {
+				info->num_segments++;
+			}
+		}
+	}
+
+	info->length = (ACPI_NAMESEG_SIZE * info->num_segments) +
+	    4 + info->num_carats;
+
+	info->next_external_char = next_external_char;
+}
+
+/*******************************************************************************
+ *
+ * FUNCTION:    acpi_ns_build_internal_name
+ *
+ * PARAMETERS:  info            - Info struct fully initialized
+ *
+ * RETURN:      Status
+ *
+ * DESCRIPTION: Construct the internal (AML) namestring
+ *              corresponding to the external (ASL) namestring.
+ *
+ ******************************************************************************/
+
+acpi_status acpi_ns_build_internal_name(struct acpi_namestring_info *info)
+{
+	u32 num_segments = info->num_segments;
+	char *internal_name = info->internal_name;
+	const char *external_name = info->next_external_char;
+	char *result = NULL;
+	u32 i;
+
+	ACPI_FUNCTION_TRACE(ns_build_internal_name);
+
+	/* Setup the correct prefixes, counts, and pointers */
+
+	if (info->fully_qualified) {
+		internal_name[0] = AML_ROOT_PREFIX;
+
+		if (num_segments <= 1) {
+			result = &internal_name[1];
+		} else if (num_segments == 2) {
+			internal_name[1] = AML_DUAL_NAME_PREFIX;
+			result = &internal_name[2];
+		} else {
+			internal_name[1] = AML_MULTI_NAME_PREFIX;
+			internal_name[2] = (char)num_segments;
+			result = &internal_name[3];
+		}
+	} else {
+		/*
+		 * Not fully qualified.
+		 * Handle Carats first, then append the name segments
+		 */
+		i = 0;
+		if (info->num_carats) {
+			for (i = 0; i < info->num_carats; i++) {
+				internal_name[i] = AML_PARENT_PREFIX;
+			}
+		}
+
+		if (num_segments <= 1) {
+			result = &internal_name[i];
+		} else if (num_segments == 2) {
+			internal_name[i] = AML_DUAL_NAME_PREFIX;
+			result = &internal_name[(acpi_size)i + 1];
+		} else {
+			internal_name[i] = AML_MULTI_NAME_PREFIX;
+			internal_name[(acpi_size)i + 1] = (char)num_segments;
+			result = &internal_name[(acpi_size)i + 2];
+		}
+	}
+
+	/* Build the name (minus path separators) */
+
+	for (; num_segments; num_segments--) {
+		for (i = 0; i < ACPI_NAMESEG_SIZE; i++) {
+			if (ACPI_IS_PATH_SEPARATOR(*external_name) ||
+			    (*external_name == 0)) {
+
+				/* Pad the segment with underscore(s) if segment is short */
+
+				result[i] = '_';
+			} else {
+				/* Convert the character to uppercase and save it */
+
+				result[i] = (char)toupper((int)*external_name);
+				external_name++;
+			}
+		}
+
+		/* Now we must have a path separator, or the pathname is bad */
+
+		if (!ACPI_IS_PATH_SEPARATOR(*external_name) &&
+		    (*external_name != 0)) {
+			return_ACPI_STATUS(AE_BAD_PATHNAME);
+		}
+
+		/* Move on the next segment */
+
+		external_name++;
+		result += ACPI_NAMESEG_SIZE;
+	}
+
+	/* Terminate the string */
+
+	*result = 0;
+
+	if (info->fully_qualified) {
+		ACPI_DEBUG_PRINT((ACPI_DB_EXEC,
+				  "Returning [%p] (abs) \"\\%s\"\n",
+				  internal_name, internal_name));
+	} else {
+		ACPI_DEBUG_PRINT((ACPI_DB_EXEC, "Returning [%p] (rel) \"%s\"\n",
+				  internal_name, internal_name));
+	}
+
+	return_ACPI_STATUS(AE_OK);
+}
+
+/*******************************************************************************
+ *
+ * FUNCTION:    acpi_ns_internalize_name
+ *
+ * PARAMETERS:  *external_name          - External representation of name
+ *              **Converted name        - Where to return the resulting
+ *                                        internal represention of the name
+ *
+ * RETURN:      Status
+ *
+ * DESCRIPTION: Convert an external representation (e.g. "\_PR_.CPU0")
+ *              to internal form (e.g. 5c 2f 02 5f 50 52 5f 43 50 55 30)
+ *
+ *******************************************************************************/
+
+acpi_status
+acpi_ns_internalize_name(const char *external_name, char **converted_name)
+{
+	char *internal_name;
+	struct acpi_namestring_info info;
+	acpi_status status;
+
+	ACPI_FUNCTION_TRACE(ns_internalize_name);
+
+	if ((!external_name) || (*external_name == 0) || (!converted_name)) {
+		return_ACPI_STATUS(AE_BAD_PARAMETER);
+	}
+
+	/* Get the length of the new internal name */
+
+	info.external_name = external_name;
+	acpi_ns_get_internal_name_length(&info);
+
+	/* We need a segment to store the internal  name */
+
+	internal_name = ACPI_ALLOCATE_ZEROED(info.length);
+	if (!internal_name) {
+		return_ACPI_STATUS(AE_NO_MEMORY);
+	}
+
+	/* Build the name */
+
+	info.internal_name = internal_name;
+	status = acpi_ns_build_internal_name(&info);
+	if (ACPI_FAILURE(status)) {
+		ACPI_FREE(internal_name);
+		return_ACPI_STATUS(status);
+	}
+
+	*converted_name = internal_name;
+	return_ACPI_STATUS(AE_OK);
+}
+
+/*******************************************************************************
+ *
+ * FUNCTION:    acpi_ns_externalize_name
+ *
+ * PARAMETERS:  internal_name_length - Length of the internal name below
+ *              internal_name       - Internal representation of name
+ *              converted_name_length - Where the length is returned
+ *              converted_name      - Where the resulting external name
+ *                                    is returned
+ *
+ * RETURN:      Status
+ *
+ * DESCRIPTION: Convert internal name (e.g. 5c 2f 02 5f 50 52 5f 43 50 55 30)
+ *              to its external (printable) form (e.g. "\_PR_.CPU0")
+ *
+ ******************************************************************************/
+
+acpi_status
+acpi_ns_externalize_name(u32 internal_name_length,
+			 const char *internal_name,
+			 u32 * converted_name_length, char **converted_name)
+{
+	u32 names_index = 0;
+	u32 num_segments = 0;
+	u32 required_length;
+	u32 prefix_length = 0;
+	u32 i = 0;
+	u32 j = 0;
+
+	ACPI_FUNCTION_TRACE(ns_externalize_name);
+
+	if (!internal_name_length || !internal_name || !converted_name) {
+		return_ACPI_STATUS(AE_BAD_PARAMETER);
+	}
+
+	/* Check for a prefix (one '\' | one or more '^') */
+
+	switch (internal_name[0]) {
+	case AML_ROOT_PREFIX:
+
+		prefix_length = 1;
+		break;
+
+	case AML_PARENT_PREFIX:
+
+		for (i = 0; i < internal_name_length; i++) {
+			if (ACPI_IS_PARENT_PREFIX(internal_name[i])) {
+				prefix_length = i + 1;
+			} else {
+				break;
+			}
+		}
+
+		if (i == internal_name_length) {
+			prefix_length = i;
+		}
+
+		break;
+
+	default:
+
+		break;
+	}
+
+	/*
+	 * Check for object names. Note that there could be 0-255 of these
+	 * 4-byte elements.
+	 */
+	if (prefix_length < internal_name_length) {
+		switch (internal_name[prefix_length]) {
+		case AML_MULTI_NAME_PREFIX:
+
+			/* <count> 4-byte names */
+
+			names_index = prefix_length + 2;
+			num_segments = (u8)
+			    internal_name[(acpi_size)prefix_length + 1];
+			break;
+
+		case AML_DUAL_NAME_PREFIX:
+
+			/* Two 4-byte names */
+
+			names_index = prefix_length + 1;
+			num_segments = 2;
+			break;
+
+		case 0:
+
+			/* null_name */
+
+			names_index = 0;
+			num_segments = 0;
+			break;
+
+		default:
+
+			/* one 4-byte name */
+
+			names_index = prefix_length;
+			num_segments = 1;
+			break;
+		}
+	}
+
+	/*
+	 * Calculate the length of converted_name, which equals the length
+	 * of the prefix, length of all object names, length of any required
+	 * punctuation ('.') between object names, plus the NULL terminator.
+	 */
+	required_length = prefix_length + (4 * num_segments) +
+	    ((num_segments > 0) ? (num_segments - 1) : 0) + 1;
+
+	/*
+	 * Check to see if we're still in bounds. If not, there's a problem
+	 * with internal_name (invalid format).
+	 */
+	if (required_length > internal_name_length) {
+		ACPI_ERROR((AE_INFO, "Invalid internal name"));
+		return_ACPI_STATUS(AE_BAD_PATHNAME);
+	}
+
+	/* Build the converted_name */
+
+	*converted_name = ACPI_ALLOCATE_ZEROED(required_length);
+	if (!(*converted_name)) {
+		return_ACPI_STATUS(AE_NO_MEMORY);
+	}
+
+	j = 0;
+
+	for (i = 0; i < prefix_length; i++) {
+		(*converted_name)[j++] = internal_name[i];
+	}
+
+	if (num_segments > 0) {
+		for (i = 0; i < num_segments; i++) {
+			if (i > 0) {
+				(*converted_name)[j++] = '.';
+			}
+
+			/* Copy and validate the 4-char name segment */
+
+			ACPI_COPY_NAMESEG(&(*converted_name)[j],
+					  &internal_name[names_index]);
+			acpi_ut_repair_name(&(*converted_name)[j]);
+
+			j += ACPI_NAMESEG_SIZE;
+			names_index += ACPI_NAMESEG_SIZE;
+		}
+	}
+
+	if (converted_name_length) {
+		*converted_name_length = (u32) required_length;
+	}
+
+	return_ACPI_STATUS(AE_OK);
+}
+
+/*******************************************************************************
+ *
+ * FUNCTION:    acpi_ns_validate_handle
+ *
+ * PARAMETERS:  handle          - Handle to be validated and typecast to a
+ *                                namespace node.
+ *
+ * RETURN:      A pointer to a namespace node
+ *
+ * DESCRIPTION: Convert a namespace handle to a namespace node. Handles special
+ *              cases for the root node.
+ *
+ * NOTE: Real integer handles would allow for more verification
+ *       and keep all pointers within this subsystem - however this introduces
+ *       more overhead and has not been necessary to this point. Drivers
+ *       holding handles are typically notified before a node becomes invalid
+ *       due to a table unload.
+ *
+ ******************************************************************************/
+
+struct acpi_namespace_node *acpi_ns_validate_handle(acpi_handle handle)
+{
+
+	ACPI_FUNCTION_ENTRY();
+
+	/* Parameter validation */
+
+	if ((!handle) || (handle == ACPI_ROOT_OBJECT)) {
+		return (acpi_gbl_root_node);
+	}
+
+	/* We can at least attempt to verify the handle */
+
+	if (ACPI_GET_DESCRIPTOR_TYPE(handle) != ACPI_DESC_TYPE_NAMED) {
+		return (NULL);
+	}
+
+	return (ACPI_CAST_PTR(struct acpi_namespace_node, handle));
+}
+
+/*******************************************************************************
+ *
+ * FUNCTION:    acpi_ns_terminate
+ *
+ * PARAMETERS:  none
+ *
+ * RETURN:      none
+ *
+ * DESCRIPTION: free memory allocated for namespace and ACPI table storage.
+ *
+ ******************************************************************************/
+
+void acpi_ns_terminate(void)
+{
+	acpi_status status;
+
+	ACPI_FUNCTION_TRACE(ns_terminate);
+
+	/*
+	 * Free the entire namespace -- all nodes and all objects
+	 * attached to the nodes
+	 */
+	acpi_ns_delete_namespace_subtree(acpi_gbl_root_node);
+
+	/* Delete any objects attached to the root node */
+
+	status = acpi_ut_acquire_mutex(ACPI_MTX_NAMESPACE);
+	if (ACPI_FAILURE(status)) {
+		return_VOID;
+	}
+
+	acpi_ns_delete_node(acpi_gbl_root_node);
+	(void)acpi_ut_release_mutex(ACPI_MTX_NAMESPACE);
+
+	ACPI_DEBUG_PRINT((ACPI_DB_INFO, "Namespace freed\n"));
+	return_VOID;
+}
+
+/*******************************************************************************
+ *
+ * FUNCTION:    acpi_ns_opens_scope
+ *
+ * PARAMETERS:  type        - A valid namespace type
+ *
+ * RETURN:      NEWSCOPE if the passed type "opens a name scope" according
+ *              to the ACPI specification, else 0
+ *
+ ******************************************************************************/
+
+u32 acpi_ns_opens_scope(acpi_object_type type)
+{
+	ACPI_FUNCTION_ENTRY();
+
+	if (type > ACPI_TYPE_LOCAL_MAX) {
+
+		/* type code out of range  */
+
+		ACPI_WARNING((AE_INFO, "Invalid Object Type 0x%X", type));
+		return (ACPI_NS_NORMAL);
+	}
+
+	return (((u32)acpi_gbl_ns_properties[type]) & ACPI_NS_NEWSCOPE);
+}
+
+/*******************************************************************************
+ *
+ * FUNCTION:    acpi_ns_get_node_unlocked
+ *
+ * PARAMETERS:  *pathname   - Name to be found, in external (ASL) format. The
+ *                            \ (backslash) and ^ (carat) prefixes, and the
+ *                            . (period) to separate segments are supported.
+ *              prefix_node  - Root of subtree to be searched, or NS_ALL for the
+ *                            root of the name space. If Name is fully
+ *                            qualified (first s8 is '\'), the passed value
+ *                            of Scope will not be accessed.
+ *              flags       - Used to indicate whether to perform upsearch or
+ *                            not.
+ *              return_node - Where the Node is returned
+ *
+ * DESCRIPTION: Look up a name relative to a given scope and return the
+ *              corresponding Node. NOTE: Scope can be null.
+ *
+ * MUTEX:       Doesn't locks namespace
+ *
+ ******************************************************************************/
+
+acpi_status
+acpi_ns_get_node_unlocked(struct acpi_namespace_node *prefix_node,
+			  const char *pathname,
+			  u32 flags, struct acpi_namespace_node **return_node)
+{
+	union acpi_generic_state scope_info;
+	acpi_status status;
+	char *internal_path;
+
+	ACPI_FUNCTION_TRACE_PTR(ns_get_node_unlocked,
+				ACPI_CAST_PTR(char, pathname));
+
+	/* Simplest case is a null pathname */
+
+	if (!pathname) {
+		*return_node = prefix_node;
+		if (!prefix_node) {
+			*return_node = acpi_gbl_root_node;
+		}
+
+		return_ACPI_STATUS(AE_OK);
+	}
+
+	/* Quick check for a reference to the root */
+
+	if (ACPI_IS_ROOT_PREFIX(pathname[0]) && (!pathname[1])) {
+		*return_node = acpi_gbl_root_node;
+		return_ACPI_STATUS(AE_OK);
+	}
+
+	/* Convert path to internal representation */
+
+	status = acpi_ns_internalize_name(pathname, &internal_path);
+	if (ACPI_FAILURE(status)) {
+		return_ACPI_STATUS(status);
+	}
+
+	/* Setup lookup scope (search starting point) */
+
+	scope_info.scope.node = prefix_node;
+
+	/* Lookup the name in the namespace */
+
+	status = acpi_ns_lookup(&scope_info, internal_path, ACPI_TYPE_ANY,
+				ACPI_IMODE_EXECUTE,
+				(flags | ACPI_NS_DONT_OPEN_SCOPE), NULL,
+				return_node);
+	if (ACPI_FAILURE(status)) {
+		ACPI_DEBUG_PRINT((ACPI_DB_EXEC, "%s, %s\n",
+				  pathname, acpi_format_exception(status)));
+	}
+
+	ACPI_FREE(internal_path);
+	return_ACPI_STATUS(status);
+}
+
+/*******************************************************************************
+ *
+ * FUNCTION:    acpi_ns_get_node
+ *
+ * PARAMETERS:  *pathname   - Name to be found, in external (ASL) format. The
+ *                            \ (backslash) and ^ (carat) prefixes, and the
+ *                            . (period) to separate segments are supported.
+ *              prefix_node  - Root of subtree to be searched, or NS_ALL for the
+ *                            root of the name space. If Name is fully
+ *                            qualified (first s8 is '\'), the passed value
+ *                            of Scope will not be accessed.
+ *              flags       - Used to indicate whether to perform upsearch or
+ *                            not.
+ *              return_node - Where the Node is returned
+ *
+ * DESCRIPTION: Look up a name relative to a given scope and return the
+ *              corresponding Node. NOTE: Scope can be null.
+ *
+ * MUTEX:       Locks namespace
+ *
+ ******************************************************************************/
+
+acpi_status
+acpi_ns_get_node(struct acpi_namespace_node *prefix_node,
+		 const char *pathname,
+		 u32 flags, struct acpi_namespace_node **return_node)
+{
+	acpi_status status;
+
+	ACPI_FUNCTION_TRACE_PTR(ns_get_node, ACPI_CAST_PTR(char, pathname));
+
+	status = acpi_ut_acquire_mutex(ACPI_MTX_NAMESPACE);
+	if (ACPI_FAILURE(status)) {
+		return_ACPI_STATUS(status);
+	}
+
+	status = acpi_ns_get_node_unlocked(prefix_node, pathname,
+					   flags, return_node);
+
+	(void)acpi_ut_release_mutex(ACPI_MTX_NAMESPACE);
+	return_ACPI_STATUS(status);
+}