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, 524 insertions, 0 deletions

diff --git a/drivers/acpi/acpica/utxface.c b/drivers/acpi/acpica/utxface.c
new file mode 100644
index 000000000..86e76b443
--- /dev/null
+++ b/drivers/acpi/acpica/utxface.c
@@ -0,0 +1,524 @@
+// SPDX-License-Identifier: BSD-3-Clause OR GPL-2.0
+/******************************************************************************
+ *
+ * Module Name: utxface - External interfaces, miscellaneous utility functions
+ *
+ * Copyright (C) 2000 - 2022, Intel Corp.
+ *
+ *****************************************************************************/
+
+#define EXPORT_ACPI_INTERFACES
+
+#include <acpi/acpi.h>
+#include "accommon.h"
+#include "acdebug.h"
+
+#define _COMPONENT          ACPI_UTILITIES
+ACPI_MODULE_NAME("utxface")
+
+/*******************************************************************************
+ *
+ * FUNCTION:    acpi_terminate
+ *
+ * PARAMETERS:  None
+ *
+ * RETURN:      Status
+ *
+ * DESCRIPTION: Shutdown the ACPICA subsystem and release all resources.
+ *
+ ******************************************************************************/
+acpi_status ACPI_INIT_FUNCTION acpi_terminate(void)
+{
+	acpi_status status;
+
+	ACPI_FUNCTION_TRACE(acpi_terminate);
+
+	/* Shutdown and free all resources */
+
+	acpi_ut_subsystem_shutdown();
+
+	/* Free the mutex objects */
+
+	acpi_ut_mutex_terminate();
+
+	/* Now we can shutdown the OS-dependent layer */
+
+	status = acpi_os_terminate();
+	return_ACPI_STATUS(status);
+}
+
+ACPI_EXPORT_SYMBOL_INIT(acpi_terminate)
+
+#ifndef ACPI_ASL_COMPILER
+#ifdef ACPI_FUTURE_USAGE
+/*******************************************************************************
+ *
+ * FUNCTION:    acpi_subsystem_status
+ *
+ * PARAMETERS:  None
+ *
+ * RETURN:      Status of the ACPI subsystem
+ *
+ * DESCRIPTION: Other drivers that use the ACPI subsystem should call this
+ *              before making any other calls, to ensure the subsystem
+ *              initialized successfully.
+ *
+ ******************************************************************************/
+acpi_status acpi_subsystem_status(void)
+{
+
+	if (acpi_gbl_startup_flags & ACPI_INITIALIZED_OK) {
+		return (AE_OK);
+	} else {
+		return (AE_ERROR);
+	}
+}
+
+ACPI_EXPORT_SYMBOL(acpi_subsystem_status)
+
+/*******************************************************************************
+ *
+ * FUNCTION:    acpi_get_system_info
+ *
+ * PARAMETERS:  out_buffer      - A buffer to receive the resources for the
+ *                                device
+ *
+ * RETURN:      status          - the status of the call
+ *
+ * DESCRIPTION: This function is called to get information about the current
+ *              state of the ACPI subsystem. It will return system information
+ *              in the out_buffer.
+ *
+ *              If the function fails an appropriate status will be returned
+ *              and the value of out_buffer is undefined.
+ *
+ ******************************************************************************/
+acpi_status acpi_get_system_info(struct acpi_buffer *out_buffer)
+{
+	struct acpi_system_info *info_ptr;
+	acpi_status status;
+
+	ACPI_FUNCTION_TRACE(acpi_get_system_info);
+
+	/* Parameter validation */
+
+	status = acpi_ut_validate_buffer(out_buffer);
+	if (ACPI_FAILURE(status)) {
+		return_ACPI_STATUS(status);
+	}
+
+	/* Validate/Allocate/Clear caller buffer */
+
+	status =
+	    acpi_ut_initialize_buffer(out_buffer,
+				      sizeof(struct acpi_system_info));
+	if (ACPI_FAILURE(status)) {
+		return_ACPI_STATUS(status);
+	}
+
+	/*
+	 * Populate the return buffer
+	 */
+	info_ptr = (struct acpi_system_info *)out_buffer->pointer;
+	info_ptr->acpi_ca_version = ACPI_CA_VERSION;
+
+	/* System flags (ACPI capabilities) */
+
+	info_ptr->flags = ACPI_SYS_MODE_ACPI;
+
+	/* Timer resolution - 24 or 32 bits  */
+
+	if (acpi_gbl_FADT.flags & ACPI_FADT_32BIT_TIMER) {
+		info_ptr->timer_resolution = 24;
+	} else {
+		info_ptr->timer_resolution = 32;
+	}
+
+	/* Clear the reserved fields */
+
+	info_ptr->reserved1 = 0;
+	info_ptr->reserved2 = 0;
+
+	/* Current debug levels */
+
+	info_ptr->debug_layer = acpi_dbg_layer;
+	info_ptr->debug_level = acpi_dbg_level;
+
+	return_ACPI_STATUS(AE_OK);
+}
+
+ACPI_EXPORT_SYMBOL(acpi_get_system_info)
+
+/*******************************************************************************
+ *
+ * FUNCTION:    acpi_get_statistics
+ *
+ * PARAMETERS:  stats           - Where the statistics are returned
+ *
+ * RETURN:      status          - the status of the call
+ *
+ * DESCRIPTION: Get the contents of the various system counters
+ *
+ ******************************************************************************/
+acpi_status acpi_get_statistics(struct acpi_statistics *stats)
+{
+	ACPI_FUNCTION_TRACE(acpi_get_statistics);
+
+	/* Parameter validation */
+
+	if (!stats) {
+		return_ACPI_STATUS(AE_BAD_PARAMETER);
+	}
+
+	/* Various interrupt-based event counters */
+
+	stats->sci_count = acpi_sci_count;
+	stats->gpe_count = acpi_gpe_count;
+
+	memcpy(stats->fixed_event_count, acpi_fixed_event_count,
+	       sizeof(acpi_fixed_event_count));
+
+	/* Other counters */
+
+	stats->method_count = acpi_method_count;
+	return_ACPI_STATUS(AE_OK);
+}
+
+ACPI_EXPORT_SYMBOL(acpi_get_statistics)
+
+/*****************************************************************************
+ *
+ * FUNCTION:    acpi_install_initialization_handler
+ *
+ * PARAMETERS:  handler             - Callback procedure
+ *              function            - Not (currently) used, see below
+ *
+ * RETURN:      Status
+ *
+ * DESCRIPTION: Install an initialization handler
+ *
+ * TBD: When a second function is added, must save the Function also.
+ *
+ ****************************************************************************/
+acpi_status
+acpi_install_initialization_handler(acpi_init_handler handler, u32 function)
+{
+
+	if (!handler) {
+		return (AE_BAD_PARAMETER);
+	}
+
+	if (acpi_gbl_init_handler) {
+		return (AE_ALREADY_EXISTS);
+	}
+
+	acpi_gbl_init_handler = handler;
+	return (AE_OK);
+}
+
+ACPI_EXPORT_SYMBOL(acpi_install_initialization_handler)
+#endif
+
+/*****************************************************************************
+ *
+ * FUNCTION:    acpi_purge_cached_objects
+ *
+ * PARAMETERS:  None
+ *
+ * RETURN:      Status
+ *
+ * DESCRIPTION: Empty all caches (delete the cached objects)
+ *
+ ****************************************************************************/
+acpi_status acpi_purge_cached_objects(void)
+{
+	ACPI_FUNCTION_TRACE(acpi_purge_cached_objects);
+
+	(void)acpi_os_purge_cache(acpi_gbl_state_cache);
+	(void)acpi_os_purge_cache(acpi_gbl_operand_cache);
+	(void)acpi_os_purge_cache(acpi_gbl_ps_node_cache);
+	(void)acpi_os_purge_cache(acpi_gbl_ps_node_ext_cache);
+
+	return_ACPI_STATUS(AE_OK);
+}
+
+ACPI_EXPORT_SYMBOL(acpi_purge_cached_objects)
+
+/*****************************************************************************
+ *
+ * FUNCTION:    acpi_install_interface
+ *
+ * PARAMETERS:  interface_name      - The interface to install
+ *
+ * RETURN:      Status
+ *
+ * DESCRIPTION: Install an _OSI interface to the global list
+ *
+ ****************************************************************************/
+acpi_status acpi_install_interface(acpi_string interface_name)
+{
+	acpi_status status;
+	struct acpi_interface_info *interface_info;
+
+	/* Parameter validation */
+
+	if (!interface_name || (strlen(interface_name) == 0)) {
+		return (AE_BAD_PARAMETER);
+	}
+
+	status = acpi_os_acquire_mutex(acpi_gbl_osi_mutex, ACPI_WAIT_FOREVER);
+	if (ACPI_FAILURE(status)) {
+		return (status);
+	}
+
+	/* Check if the interface name is already in the global list */
+
+	interface_info = acpi_ut_get_interface(interface_name);
+	if (interface_info) {
+		/*
+		 * The interface already exists in the list. This is OK if the
+		 * interface has been marked invalid -- just clear the bit.
+		 */
+		if (interface_info->flags & ACPI_OSI_INVALID) {
+			interface_info->flags &= ~ACPI_OSI_INVALID;
+			status = AE_OK;
+		} else {
+			status = AE_ALREADY_EXISTS;
+		}
+	} else {
+		/* New interface name, install into the global list */
+
+		status = acpi_ut_install_interface(interface_name);
+	}
+
+	acpi_os_release_mutex(acpi_gbl_osi_mutex);
+	return (status);
+}
+
+ACPI_EXPORT_SYMBOL(acpi_install_interface)
+
+/*****************************************************************************
+ *
+ * FUNCTION:    acpi_remove_interface
+ *
+ * PARAMETERS:  interface_name      - The interface to remove
+ *
+ * RETURN:      Status
+ *
+ * DESCRIPTION: Remove an _OSI interface from the global list
+ *
+ ****************************************************************************/
+acpi_status acpi_remove_interface(acpi_string interface_name)
+{
+	acpi_status status;
+
+	/* Parameter validation */
+
+	if (!interface_name || (strlen(interface_name) == 0)) {
+		return (AE_BAD_PARAMETER);
+	}
+
+	status = acpi_os_acquire_mutex(acpi_gbl_osi_mutex, ACPI_WAIT_FOREVER);
+	if (ACPI_FAILURE(status)) {
+		return (status);
+	}
+
+	status = acpi_ut_remove_interface(interface_name);
+
+	acpi_os_release_mutex(acpi_gbl_osi_mutex);
+	return (status);
+}
+
+ACPI_EXPORT_SYMBOL(acpi_remove_interface)
+
+/*****************************************************************************
+ *
+ * FUNCTION:    acpi_install_interface_handler
+ *
+ * PARAMETERS:  handler             - The _OSI interface handler to install
+ *                                    NULL means "remove existing handler"
+ *
+ * RETURN:      Status
+ *
+ * DESCRIPTION: Install a handler for the predefined _OSI ACPI method.
+ *              invoked during execution of the internal implementation of
+ *              _OSI. A NULL handler simply removes any existing handler.
+ *
+ ****************************************************************************/
+acpi_status acpi_install_interface_handler(acpi_interface_handler handler)
+{
+	acpi_status status;
+
+	status = acpi_os_acquire_mutex(acpi_gbl_osi_mutex, ACPI_WAIT_FOREVER);
+	if (ACPI_FAILURE(status)) {
+		return (status);
+	}
+
+	if (handler && acpi_gbl_interface_handler) {
+		status = AE_ALREADY_EXISTS;
+	} else {
+		acpi_gbl_interface_handler = handler;
+	}
+
+	acpi_os_release_mutex(acpi_gbl_osi_mutex);
+	return (status);
+}
+
+ACPI_EXPORT_SYMBOL(acpi_install_interface_handler)
+
+/*****************************************************************************
+ *
+ * FUNCTION:    acpi_update_interfaces
+ *
+ * PARAMETERS:  action              - Actions to be performed during the
+ *                                    update
+ *
+ * RETURN:      Status
+ *
+ * DESCRIPTION: Update _OSI interface strings, disabling or enabling OS vendor
+ *              string or/and feature group strings.
+ *
+ ****************************************************************************/
+acpi_status acpi_update_interfaces(u8 action)
+{
+	acpi_status status;
+
+	status = acpi_os_acquire_mutex(acpi_gbl_osi_mutex, ACPI_WAIT_FOREVER);
+	if (ACPI_FAILURE(status)) {
+		return (status);
+	}
+
+	status = acpi_ut_update_interfaces(action);
+
+	acpi_os_release_mutex(acpi_gbl_osi_mutex);
+	return (status);
+}
+
+/*****************************************************************************
+ *
+ * FUNCTION:    acpi_check_address_range
+ *
+ * PARAMETERS:  space_id            - Address space ID
+ *              address             - Start address
+ *              length              - Length
+ *              warn                - TRUE if warning on overlap desired
+ *
+ * RETURN:      Count of the number of conflicts detected.
+ *
+ * DESCRIPTION: Check if the input address range overlaps any of the
+ *              ASL operation region address ranges.
+ *
+ ****************************************************************************/
+
+u32
+acpi_check_address_range(acpi_adr_space_type space_id,
+			 acpi_physical_address address,
+			 acpi_size length, u8 warn)
+{
+	u32 overlaps;
+	acpi_status status;
+
+	status = acpi_ut_acquire_mutex(ACPI_MTX_NAMESPACE);
+	if (ACPI_FAILURE(status)) {
+		return (0);
+	}
+
+	overlaps = acpi_ut_check_address_range(space_id, address,
+					       (u32)length, warn);
+
+	(void)acpi_ut_release_mutex(ACPI_MTX_NAMESPACE);
+	return (overlaps);
+}
+
+ACPI_EXPORT_SYMBOL(acpi_check_address_range)
+#endif				/* !ACPI_ASL_COMPILER */
+/*******************************************************************************
+ *
+ * FUNCTION:    acpi_decode_pld_buffer
+ *
+ * PARAMETERS:  in_buffer           - Buffer returned by _PLD method
+ *              length              - Length of the in_buffer
+ *              return_buffer       - Where the decode buffer is returned
+ *
+ * RETURN:      Status and the decoded _PLD buffer. User must deallocate
+ *              the buffer via ACPI_FREE.
+ *
+ * DESCRIPTION: Decode the bit-packed buffer returned by the _PLD method into
+ *              a local struct that is much more useful to an ACPI driver.
+ *
+ ******************************************************************************/
+acpi_status
+acpi_decode_pld_buffer(u8 *in_buffer,
+		       acpi_size length, struct acpi_pld_info **return_buffer)
+{
+	struct acpi_pld_info *pld_info;
+	u32 *buffer = ACPI_CAST_PTR(u32, in_buffer);
+	u32 dword;
+
+	/* Parameter validation */
+
+	if (!in_buffer || !return_buffer
+	    || (length < ACPI_PLD_REV1_BUFFER_SIZE)) {
+		return (AE_BAD_PARAMETER);
+	}
+
+	pld_info = ACPI_ALLOCATE_ZEROED(sizeof(struct acpi_pld_info));
+	if (!pld_info) {
+		return (AE_NO_MEMORY);
+	}
+
+	/* First 32-bit DWord */
+
+	ACPI_MOVE_32_TO_32(&dword, &buffer[0]);
+	pld_info->revision = ACPI_PLD_GET_REVISION(&dword);
+	pld_info->ignore_color = ACPI_PLD_GET_IGNORE_COLOR(&dword);
+	pld_info->red = ACPI_PLD_GET_RED(&dword);
+	pld_info->green = ACPI_PLD_GET_GREEN(&dword);
+	pld_info->blue = ACPI_PLD_GET_BLUE(&dword);
+
+	/* Second 32-bit DWord */
+
+	ACPI_MOVE_32_TO_32(&dword, &buffer[1]);
+	pld_info->width = ACPI_PLD_GET_WIDTH(&dword);
+	pld_info->height = ACPI_PLD_GET_HEIGHT(&dword);
+
+	/* Third 32-bit DWord */
+
+	ACPI_MOVE_32_TO_32(&dword, &buffer[2]);
+	pld_info->user_visible = ACPI_PLD_GET_USER_VISIBLE(&dword);
+	pld_info->dock = ACPI_PLD_GET_DOCK(&dword);
+	pld_info->lid = ACPI_PLD_GET_LID(&dword);
+	pld_info->panel = ACPI_PLD_GET_PANEL(&dword);
+	pld_info->vertical_position = ACPI_PLD_GET_VERTICAL(&dword);
+	pld_info->horizontal_position = ACPI_PLD_GET_HORIZONTAL(&dword);
+	pld_info->shape = ACPI_PLD_GET_SHAPE(&dword);
+	pld_info->group_orientation = ACPI_PLD_GET_ORIENTATION(&dword);
+	pld_info->group_token = ACPI_PLD_GET_TOKEN(&dword);
+	pld_info->group_position = ACPI_PLD_GET_POSITION(&dword);
+	pld_info->bay = ACPI_PLD_GET_BAY(&dword);
+
+	/* Fourth 32-bit DWord */
+
+	ACPI_MOVE_32_TO_32(&dword, &buffer[3]);
+	pld_info->ejectable = ACPI_PLD_GET_EJECTABLE(&dword);
+	pld_info->ospm_eject_required = ACPI_PLD_GET_OSPM_EJECT(&dword);
+	pld_info->cabinet_number = ACPI_PLD_GET_CABINET(&dword);
+	pld_info->card_cage_number = ACPI_PLD_GET_CARD_CAGE(&dword);
+	pld_info->reference = ACPI_PLD_GET_REFERENCE(&dword);
+	pld_info->rotation = ACPI_PLD_GET_ROTATION(&dword);
+	pld_info->order = ACPI_PLD_GET_ORDER(&dword);
+
+	if (length >= ACPI_PLD_REV2_BUFFER_SIZE) {
+
+		/* Fifth 32-bit DWord (Revision 2 of _PLD) */
+
+		ACPI_MOVE_32_TO_32(&dword, &buffer[4]);
+		pld_info->vertical_offset = ACPI_PLD_GET_VERT_OFFSET(&dword);
+		pld_info->horizontal_offset = ACPI_PLD_GET_HORIZ_OFFSET(&dword);
+	}
+
+	*return_buffer = pld_info;
+	return (AE_OK);
+}
+
+ACPI_EXPORT_SYMBOL(acpi_decode_pld_buffer)