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, 544 insertions, 0 deletions

diff --git a/drivers/acpi/acpica/exregion.c b/drivers/acpi/acpica/exregion.c
new file mode 100644
index 000000000..4ff35852c
--- /dev/null
+++ b/drivers/acpi/acpica/exregion.c
@@ -0,0 +1,544 @@
+// SPDX-License-Identifier: BSD-3-Clause OR GPL-2.0
+/******************************************************************************
+ *
+ * Module Name: exregion - ACPI default op_region (address space) handlers
+ *
+ * Copyright (C) 2000 - 2022, Intel Corp.
+ *
+ *****************************************************************************/
+
+#include <acpi/acpi.h>
+#include "accommon.h"
+#include "acinterp.h"
+
+#define _COMPONENT          ACPI_EXECUTER
+ACPI_MODULE_NAME("exregion")
+
+/*******************************************************************************
+ *
+ * FUNCTION:    acpi_ex_system_memory_space_handler
+ *
+ * PARAMETERS:  function            - Read or Write operation
+ *              address             - Where in the space to read or write
+ *              bit_width           - Field width in bits (8, 16, or 32)
+ *              value               - Pointer to in or out value
+ *              handler_context     - Pointer to Handler's context
+ *              region_context      - Pointer to context specific to the
+ *                                    accessed region
+ *
+ * RETURN:      Status
+ *
+ * DESCRIPTION: Handler for the System Memory address space (Op Region)
+ *
+ ******************************************************************************/
+acpi_status
+acpi_ex_system_memory_space_handler(u32 function,
+				    acpi_physical_address address,
+				    u32 bit_width,
+				    u64 *value,
+				    void *handler_context, void *region_context)
+{
+	acpi_status status = AE_OK;
+	void *logical_addr_ptr = NULL;
+	struct acpi_mem_space_context *mem_info = region_context;
+	struct acpi_mem_mapping *mm = mem_info->cur_mm;
+	u32 length;
+	acpi_size map_length;
+	acpi_size page_boundary_map_length;
+#ifdef ACPI_MISALIGNMENT_NOT_SUPPORTED
+	u32 remainder;
+#endif
+
+	ACPI_FUNCTION_TRACE(ex_system_memory_space_handler);
+
+	/* Validate and translate the bit width */
+
+	switch (bit_width) {
+	case 8:
+
+		length = 1;
+		break;
+
+	case 16:
+
+		length = 2;
+		break;
+
+	case 32:
+
+		length = 4;
+		break;
+
+	case 64:
+
+		length = 8;
+		break;
+
+	default:
+
+		ACPI_ERROR((AE_INFO, "Invalid SystemMemory width %u",
+			    bit_width));
+		return_ACPI_STATUS(AE_AML_OPERAND_VALUE);
+	}
+
+#ifdef ACPI_MISALIGNMENT_NOT_SUPPORTED
+	/*
+	 * Hardware does not support non-aligned data transfers, we must verify
+	 * the request.
+	 */
+	(void)acpi_ut_short_divide((u64) address, length, NULL, &remainder);
+	if (remainder != 0) {
+		return_ACPI_STATUS(AE_AML_ALIGNMENT);
+	}
+#endif
+
+	/*
+	 * Does the request fit into the cached memory mapping?
+	 * Is 1) Address below the current mapping? OR
+	 *    2) Address beyond the current mapping?
+	 */
+	if (!mm || (address < mm->physical_address) ||
+	    ((u64) address + length > (u64) mm->physical_address + mm->length)) {
+		/*
+		 * The request cannot be resolved by the current memory mapping.
+		 *
+		 * Look for an existing saved mapping covering the address range
+		 * at hand.  If found, save it as the current one and carry out
+		 * the access.
+		 */
+		for (mm = mem_info->first_mm; mm; mm = mm->next_mm) {
+			if (mm == mem_info->cur_mm)
+				continue;
+
+			if (address < mm->physical_address)
+				continue;
+
+			if ((u64) address + length >
+					(u64) mm->physical_address + mm->length)
+				continue;
+
+			mem_info->cur_mm = mm;
+			goto access;
+		}
+
+		/* Create a new mappings list entry */
+		mm = ACPI_ALLOCATE_ZEROED(sizeof(*mm));
+		if (!mm) {
+			ACPI_ERROR((AE_INFO,
+				    "Unable to save memory mapping at 0x%8.8X%8.8X, size %u",
+				    ACPI_FORMAT_UINT64(address), length));
+			return_ACPI_STATUS(AE_NO_MEMORY);
+		}
+
+		/*
+		 * October 2009: Attempt to map from the requested address to the
+		 * end of the region. However, we will never map more than one
+		 * page, nor will we cross a page boundary.
+		 */
+		map_length = (acpi_size)
+		    ((mem_info->address + mem_info->length) - address);
+
+		/*
+		 * If mapping the entire remaining portion of the region will cross
+		 * a page boundary, just map up to the page boundary, do not cross.
+		 * On some systems, crossing a page boundary while mapping regions
+		 * can cause warnings if the pages have different attributes
+		 * due to resource management.
+		 *
+		 * This has the added benefit of constraining a single mapping to
+		 * one page, which is similar to the original code that used a 4k
+		 * maximum window.
+		 */
+		page_boundary_map_length = (acpi_size)
+		    (ACPI_ROUND_UP(address, ACPI_DEFAULT_PAGE_SIZE) - address);
+		if (page_boundary_map_length == 0) {
+			page_boundary_map_length = ACPI_DEFAULT_PAGE_SIZE;
+		}
+
+		if (map_length > page_boundary_map_length) {
+			map_length = page_boundary_map_length;
+		}
+
+		/* Create a new mapping starting at the address given */
+
+		logical_addr_ptr = acpi_os_map_memory(address, map_length);
+		if (!logical_addr_ptr) {
+			ACPI_ERROR((AE_INFO,
+				    "Could not map memory at 0x%8.8X%8.8X, size %u",
+				    ACPI_FORMAT_UINT64(address),
+				    (u32)map_length));
+			ACPI_FREE(mm);
+			return_ACPI_STATUS(AE_NO_MEMORY);
+		}
+
+		/* Save the physical address and mapping size */
+
+		mm->logical_address = logical_addr_ptr;
+		mm->physical_address = address;
+		mm->length = map_length;
+
+		/*
+		 * Add the new entry to the mappigs list and save it as the
+		 * current mapping.
+		 */
+		mm->next_mm = mem_info->first_mm;
+		mem_info->first_mm = mm;
+
+		mem_info->cur_mm = mm;
+	}
+
+access:
+	/*
+	 * Generate a logical pointer corresponding to the address we want to
+	 * access
+	 */
+	logical_addr_ptr = mm->logical_address +
+		((u64) address - (u64) mm->physical_address);
+
+	ACPI_DEBUG_PRINT((ACPI_DB_INFO,
+			  "System-Memory (width %u) R/W %u Address=%8.8X%8.8X\n",
+			  bit_width, function, ACPI_FORMAT_UINT64(address)));
+
+	/*
+	 * Perform the memory read or write
+	 *
+	 * Note: For machines that do not support non-aligned transfers, the target
+	 * address was checked for alignment above. We do not attempt to break the
+	 * transfer up into smaller (byte-size) chunks because the AML specifically
+	 * asked for a transfer width that the hardware may require.
+	 */
+	switch (function) {
+	case ACPI_READ:
+
+		*value = 0;
+		switch (bit_width) {
+		case 8:
+
+			*value = (u64)ACPI_GET8(logical_addr_ptr);
+			break;
+
+		case 16:
+
+			*value = (u64)ACPI_GET16(logical_addr_ptr);
+			break;
+
+		case 32:
+
+			*value = (u64)ACPI_GET32(logical_addr_ptr);
+			break;
+
+		case 64:
+
+			*value = (u64)ACPI_GET64(logical_addr_ptr);
+			break;
+
+		default:
+
+			/* bit_width was already validated */
+
+			break;
+		}
+		break;
+
+	case ACPI_WRITE:
+
+		switch (bit_width) {
+		case 8:
+
+			ACPI_SET8(logical_addr_ptr, *value);
+			break;
+
+		case 16:
+
+			ACPI_SET16(logical_addr_ptr, *value);
+			break;
+
+		case 32:
+
+			ACPI_SET32(logical_addr_ptr, *value);
+			break;
+
+		case 64:
+
+			ACPI_SET64(logical_addr_ptr, *value);
+			break;
+
+		default:
+
+			/* bit_width was already validated */
+
+			break;
+		}
+		break;
+
+	default:
+
+		status = AE_BAD_PARAMETER;
+		break;
+	}
+
+	return_ACPI_STATUS(status);
+}
+
+/*******************************************************************************
+ *
+ * FUNCTION:    acpi_ex_system_io_space_handler
+ *
+ * PARAMETERS:  function            - Read or Write operation
+ *              address             - Where in the space to read or write
+ *              bit_width           - Field width in bits (8, 16, or 32)
+ *              value               - Pointer to in or out value
+ *              handler_context     - Pointer to Handler's context
+ *              region_context      - Pointer to context specific to the
+ *                                    accessed region
+ *
+ * RETURN:      Status
+ *
+ * DESCRIPTION: Handler for the System IO address space (Op Region)
+ *
+ ******************************************************************************/
+
+acpi_status
+acpi_ex_system_io_space_handler(u32 function,
+				acpi_physical_address address,
+				u32 bit_width,
+				u64 *value,
+				void *handler_context, void *region_context)
+{
+	acpi_status status = AE_OK;
+	u32 value32;
+
+	ACPI_FUNCTION_TRACE(ex_system_io_space_handler);
+
+	ACPI_DEBUG_PRINT((ACPI_DB_INFO,
+			  "System-IO (width %u) R/W %u Address=%8.8X%8.8X\n",
+			  bit_width, function, ACPI_FORMAT_UINT64(address)));
+
+	/* Decode the function parameter */
+
+	switch (function) {
+	case ACPI_READ:
+
+		status = acpi_hw_read_port((acpi_io_address)address,
+					   &value32, bit_width);
+		*value = value32;
+		break;
+
+	case ACPI_WRITE:
+
+		status = acpi_hw_write_port((acpi_io_address)address,
+					    (u32)*value, bit_width);
+		break;
+
+	default:
+
+		status = AE_BAD_PARAMETER;
+		break;
+	}
+
+	return_ACPI_STATUS(status);
+}
+
+#ifdef ACPI_PCI_CONFIGURED
+/*******************************************************************************
+ *
+ * FUNCTION:    acpi_ex_pci_config_space_handler
+ *
+ * PARAMETERS:  function            - Read or Write operation
+ *              address             - Where in the space to read or write
+ *              bit_width           - Field width in bits (8, 16, or 32)
+ *              value               - Pointer to in or out value
+ *              handler_context     - Pointer to Handler's context
+ *              region_context      - Pointer to context specific to the
+ *                                    accessed region
+ *
+ * RETURN:      Status
+ *
+ * DESCRIPTION: Handler for the PCI Config address space (Op Region)
+ *
+ ******************************************************************************/
+
+acpi_status
+acpi_ex_pci_config_space_handler(u32 function,
+				 acpi_physical_address address,
+				 u32 bit_width,
+				 u64 *value,
+				 void *handler_context, void *region_context)
+{
+	acpi_status status = AE_OK;
+	struct acpi_pci_id *pci_id;
+	u16 pci_register;
+
+	ACPI_FUNCTION_TRACE(ex_pci_config_space_handler);
+
+	/*
+	 *  The arguments to acpi_os(Read|Write)pci_configuration are:
+	 *
+	 *  pci_segment is the PCI bus segment range 0-31
+	 *  pci_bus     is the PCI bus number range 0-255
+	 *  pci_device  is the PCI device number range 0-31
+	 *  pci_function is the PCI device function number
+	 *  pci_register is the Config space register range 0-255 bytes
+	 *
+	 *  value - input value for write, output address for read
+	 *
+	 */
+	pci_id = (struct acpi_pci_id *)region_context;
+	pci_register = (u16) (u32) address;
+
+	ACPI_DEBUG_PRINT((ACPI_DB_INFO,
+			  "Pci-Config %u (%u) Seg(%04x) Bus(%04x) "
+			  "Dev(%04x) Func(%04x) Reg(%04x)\n",
+			  function, bit_width, pci_id->segment, pci_id->bus,
+			  pci_id->device, pci_id->function, pci_register));
+
+	switch (function) {
+	case ACPI_READ:
+
+		*value = 0;
+		status =
+		    acpi_os_read_pci_configuration(pci_id, pci_register, value,
+						   bit_width);
+		break;
+
+	case ACPI_WRITE:
+
+		status =
+		    acpi_os_write_pci_configuration(pci_id, pci_register,
+						    *value, bit_width);
+		break;
+
+	default:
+
+		status = AE_BAD_PARAMETER;
+		break;
+	}
+
+	return_ACPI_STATUS(status);
+}
+#endif
+
+/*******************************************************************************
+ *
+ * FUNCTION:    acpi_ex_cmos_space_handler
+ *
+ * PARAMETERS:  function            - Read or Write operation
+ *              address             - Where in the space to read or write
+ *              bit_width           - Field width in bits (8, 16, or 32)
+ *              value               - Pointer to in or out value
+ *              handler_context     - Pointer to Handler's context
+ *              region_context      - Pointer to context specific to the
+ *                                    accessed region
+ *
+ * RETURN:      Status
+ *
+ * DESCRIPTION: Handler for the CMOS address space (Op Region)
+ *
+ ******************************************************************************/
+
+acpi_status
+acpi_ex_cmos_space_handler(u32 function,
+			   acpi_physical_address address,
+			   u32 bit_width,
+			   u64 *value,
+			   void *handler_context, void *region_context)
+{
+	acpi_status status = AE_OK;
+
+	ACPI_FUNCTION_TRACE(ex_cmos_space_handler);
+
+	return_ACPI_STATUS(status);
+}
+
+#ifdef ACPI_PCI_CONFIGURED
+/*******************************************************************************
+ *
+ * FUNCTION:    acpi_ex_pci_bar_space_handler
+ *
+ * PARAMETERS:  function            - Read or Write operation
+ *              address             - Where in the space to read or write
+ *              bit_width           - Field width in bits (8, 16, or 32)
+ *              value               - Pointer to in or out value
+ *              handler_context     - Pointer to Handler's context
+ *              region_context      - Pointer to context specific to the
+ *                                    accessed region
+ *
+ * RETURN:      Status
+ *
+ * DESCRIPTION: Handler for the PCI bar_target address space (Op Region)
+ *
+ ******************************************************************************/
+
+acpi_status
+acpi_ex_pci_bar_space_handler(u32 function,
+			      acpi_physical_address address,
+			      u32 bit_width,
+			      u64 *value,
+			      void *handler_context, void *region_context)
+{
+	acpi_status status = AE_OK;
+
+	ACPI_FUNCTION_TRACE(ex_pci_bar_space_handler);
+
+	return_ACPI_STATUS(status);
+}
+#endif
+
+/*******************************************************************************
+ *
+ * FUNCTION:    acpi_ex_data_table_space_handler
+ *
+ * PARAMETERS:  function            - Read or Write operation
+ *              address             - Where in the space to read or write
+ *              bit_width           - Field width in bits (8, 16, or 32)
+ *              value               - Pointer to in or out value
+ *              handler_context     - Pointer to Handler's context
+ *              region_context      - Pointer to context specific to the
+ *                                    accessed region
+ *
+ * RETURN:      Status
+ *
+ * DESCRIPTION: Handler for the Data Table address space (Op Region)
+ *
+ ******************************************************************************/
+
+acpi_status
+acpi_ex_data_table_space_handler(u32 function,
+				 acpi_physical_address address,
+				 u32 bit_width,
+				 u64 *value,
+				 void *handler_context, void *region_context)
+{
+	struct acpi_data_table_space_context *mapping;
+	char *pointer;
+
+	ACPI_FUNCTION_TRACE(ex_data_table_space_handler);
+
+	mapping = (struct acpi_data_table_space_context *) region_context;
+	pointer = ACPI_CAST_PTR(char, mapping->pointer) +
+	    (address - ACPI_PTR_TO_PHYSADDR(mapping->pointer));
+
+	/*
+	 * Perform the memory read or write. The bit_width was already
+	 * validated.
+	 */
+	switch (function) {
+	case ACPI_READ:
+
+		memcpy(ACPI_CAST_PTR(char, value), pointer,
+		       ACPI_DIV_8(bit_width));
+		break;
+
+	case ACPI_WRITE:
+
+		memcpy(pointer, ACPI_CAST_PTR(char, value),
+		       ACPI_DIV_8(bit_width));
+		break;
+
+	default:
+
+		return_ACPI_STATUS(AE_BAD_PARAMETER);
+	}
+
+	return_ACPI_STATUS(AE_OK);
+}