Adding upstream version 6.1.76.upstream/6.1.76upstream

Signed-off-by: Daniel Baumann <daniel.baumann@progress-linux.org>

1 files changed, 325 insertions, 0 deletions

diff --git a/drivers/acpi/acpica/hwvalid.c b/drivers/acpi/acpica/hwvalid.c
new file mode 100644
index 000000000..0d392e7b0
--- /dev/null
+++ b/drivers/acpi/acpica/hwvalid.c
@@ -0,0 +1,325 @@
+// SPDX-License-Identifier: BSD-3-Clause OR GPL-2.0
+/******************************************************************************
+ *
+ * Module Name: hwvalid - I/O request validation
+ *
+ * Copyright (C) 2000 - 2022, Intel Corp.
+ *
+ *****************************************************************************/
+
+#include <acpi/acpi.h>
+#include "accommon.h"
+
+#define _COMPONENT          ACPI_HARDWARE
+ACPI_MODULE_NAME("hwvalid")
+
+/* Local prototypes */
+static acpi_status
+acpi_hw_validate_io_request(acpi_io_address address, u32 bit_width);
+
+/*
+ * Protected I/O ports. Some ports are always illegal, and some are
+ * conditionally illegal. This table must remain ordered by port address.
+ *
+ * The table is used to implement the Microsoft port access rules that
+ * first appeared in Windows XP. Some ports are always illegal, and some
+ * ports are only illegal if the BIOS calls _OSI with nothing newer than
+ * the specific _OSI strings.
+ *
+ * This provides ACPICA with the desired port protections and
+ * Microsoft compatibility.
+ *
+ * Description of port entries:
+ *  DMA:   DMA controller
+ *  PIC0:  Programmable Interrupt Controller (8259A)
+ *  PIT1:  System Timer 1
+ *  PIT2:  System Timer 2 failsafe
+ *  RTC:   Real-time clock
+ *  CMOS:  Extended CMOS
+ *  DMA1:  DMA 1 page registers
+ *  DMA1L: DMA 1 Ch 0 low page
+ *  DMA2:  DMA 2 page registers
+ *  DMA2L: DMA 2 low page refresh
+ *  ARBC:  Arbitration control
+ *  SETUP: Reserved system board setup
+ *  POS:   POS channel select
+ *  PIC1:  Cascaded PIC
+ *  IDMA:  ISA DMA
+ *  ELCR:  PIC edge/level registers
+ *  PCI:   PCI configuration space
+ */
+static const struct acpi_port_info acpi_protected_ports[] = {
+	{"DMA", 0x0000, 0x000F, ACPI_OSI_WIN_XP},
+	{"PIC0", 0x0020, 0x0021, ACPI_ALWAYS_ILLEGAL},
+	{"PIT1", 0x0040, 0x0043, ACPI_OSI_WIN_XP},
+	{"PIT2", 0x0048, 0x004B, ACPI_OSI_WIN_XP},
+	{"RTC", 0x0070, 0x0071, ACPI_OSI_WIN_XP},
+	{"CMOS", 0x0074, 0x0076, ACPI_OSI_WIN_XP},
+	{"DMA1", 0x0081, 0x0083, ACPI_OSI_WIN_XP},
+	{"DMA1L", 0x0087, 0x0087, ACPI_OSI_WIN_XP},
+	{"DMA2", 0x0089, 0x008B, ACPI_OSI_WIN_XP},
+	{"DMA2L", 0x008F, 0x008F, ACPI_OSI_WIN_XP},
+	{"ARBC", 0x0090, 0x0091, ACPI_OSI_WIN_XP},
+	{"SETUP", 0x0093, 0x0094, ACPI_OSI_WIN_XP},
+	{"POS", 0x0096, 0x0097, ACPI_OSI_WIN_XP},
+	{"PIC1", 0x00A0, 0x00A1, ACPI_ALWAYS_ILLEGAL},
+	{"IDMA", 0x00C0, 0x00DF, ACPI_OSI_WIN_XP},
+	{"ELCR", 0x04D0, 0x04D1, ACPI_ALWAYS_ILLEGAL},
+	{"PCI", 0x0CF8, 0x0CFF, ACPI_OSI_WIN_XP}
+};
+
+#define ACPI_PORT_INFO_ENTRIES      ACPI_ARRAY_LENGTH (acpi_protected_ports)
+
+/******************************************************************************
+ *
+ * FUNCTION:    acpi_hw_validate_io_request
+ *
+ * PARAMETERS:  Address             Address of I/O port/register
+ *              bit_width           Number of bits (8,16,32)
+ *
+ * RETURN:      Status
+ *
+ * DESCRIPTION: Validates an I/O request (address/length). Certain ports are
+ *              always illegal and some ports are only illegal depending on
+ *              the requests the BIOS AML code makes to the predefined
+ *              _OSI method.
+ *
+ ******************************************************************************/
+
+static acpi_status
+acpi_hw_validate_io_request(acpi_io_address address, u32 bit_width)
+{
+	u32 i;
+	u32 byte_width;
+	acpi_io_address last_address;
+	const struct acpi_port_info *port_info;
+
+	ACPI_FUNCTION_TRACE(hw_validate_io_request);
+
+	/* Supported widths are 8/16/32 */
+
+	if ((bit_width != 8) && (bit_width != 16) && (bit_width != 32)) {
+		ACPI_ERROR((AE_INFO,
+			    "Bad BitWidth parameter: %8.8X", bit_width));
+		return_ACPI_STATUS(AE_BAD_PARAMETER);
+	}
+
+	port_info = acpi_protected_ports;
+	byte_width = ACPI_DIV_8(bit_width);
+	last_address = address + byte_width - 1;
+
+	ACPI_DEBUG_PRINT((ACPI_DB_IO,
+			  "Address %8.8X%8.8X LastAddress %8.8X%8.8X Length %X",
+			  ACPI_FORMAT_UINT64(address),
+			  ACPI_FORMAT_UINT64(last_address), byte_width));
+
+	/* Maximum 16-bit address in I/O space */
+
+	if (last_address > ACPI_UINT16_MAX) {
+		ACPI_ERROR((AE_INFO,
+			    "Illegal I/O port address/length above 64K: %8.8X%8.8X/0x%X",
+			    ACPI_FORMAT_UINT64(address), byte_width));
+		return_ACPI_STATUS(AE_LIMIT);
+	}
+
+	/* Exit if requested address is not within the protected port table */
+
+	if (address > acpi_protected_ports[ACPI_PORT_INFO_ENTRIES - 1].end) {
+		return_ACPI_STATUS(AE_OK);
+	}
+
+	/* Check request against the list of protected I/O ports */
+
+	for (i = 0; i < ACPI_PORT_INFO_ENTRIES; i++, port_info++) {
+		/*
+		 * Check if the requested address range will write to a reserved
+		 * port. There are four cases to consider:
+		 *
+		 * 1) Address range is contained completely in the port address range
+		 * 2) Address range overlaps port range at the port range start
+		 * 3) Address range overlaps port range at the port range end
+		 * 4) Address range completely encompasses the port range
+		 */
+		if ((address <= port_info->end)
+		    && (last_address >= port_info->start)) {
+
+			/* Port illegality may depend on the _OSI calls made by the BIOS */
+
+			if (port_info->osi_dependency == ACPI_ALWAYS_ILLEGAL ||
+			    acpi_gbl_osi_data == port_info->osi_dependency) {
+				ACPI_DEBUG_PRINT((ACPI_DB_VALUES,
+						  "Denied AML access to port 0x%8.8X%8.8X/%X (%s 0x%.4X-0x%.4X)\n",
+						  ACPI_FORMAT_UINT64(address),
+						  byte_width, port_info->name,
+						  port_info->start,
+						  port_info->end));
+
+				return_ACPI_STATUS(AE_AML_ILLEGAL_ADDRESS);
+			}
+		}
+
+		/* Finished if address range ends before the end of this port */
+
+		if (last_address <= port_info->end) {
+			break;
+		}
+	}
+
+	return_ACPI_STATUS(AE_OK);
+}
+
+/******************************************************************************
+ *
+ * FUNCTION:    acpi_hw_read_port
+ *
+ * PARAMETERS:  Address             Address of I/O port/register to read
+ *              Value               Where value (data) is returned
+ *              Width               Number of bits
+ *
+ * RETURN:      Status and value read from port
+ *
+ * DESCRIPTION: Read data from an I/O port or register. This is a front-end
+ *              to acpi_os_read_port that performs validation on both the port
+ *              address and the length.
+ *
+ *****************************************************************************/
+
+acpi_status acpi_hw_read_port(acpi_io_address address, u32 *value, u32 width)
+{
+	acpi_status status;
+	u32 one_byte;
+	u32 i;
+
+	/* Truncate address to 16 bits if requested */
+
+	if (acpi_gbl_truncate_io_addresses) {
+		address &= ACPI_UINT16_MAX;
+	}
+
+	/* Validate the entire request and perform the I/O */
+
+	status = acpi_hw_validate_io_request(address, width);
+	if (ACPI_SUCCESS(status)) {
+		status = acpi_os_read_port(address, value, width);
+		return (status);
+	}
+
+	if (status != AE_AML_ILLEGAL_ADDRESS) {
+		return (status);
+	}
+
+	/*
+	 * There has been a protection violation within the request. Fall
+	 * back to byte granularity port I/O and ignore the failing bytes.
+	 * This provides compatibility with other ACPI implementations.
+	 */
+	for (i = 0, *value = 0; i < width; i += 8) {
+
+		/* Validate and read one byte */
+
+		if (acpi_hw_validate_io_request(address, 8) == AE_OK) {
+			status = acpi_os_read_port(address, &one_byte, 8);
+			if (ACPI_FAILURE(status)) {
+				return (status);
+			}
+
+			*value |= (one_byte << i);
+		}
+
+		address++;
+	}
+
+	return (AE_OK);
+}
+
+/******************************************************************************
+ *
+ * FUNCTION:    acpi_hw_write_port
+ *
+ * PARAMETERS:  Address             Address of I/O port/register to write
+ *              Value               Value to write
+ *              Width               Number of bits
+ *
+ * RETURN:      Status
+ *
+ * DESCRIPTION: Write data to an I/O port or register. This is a front-end
+ *              to acpi_os_write_port that performs validation on both the port
+ *              address and the length.
+ *
+ *****************************************************************************/
+
+acpi_status acpi_hw_write_port(acpi_io_address address, u32 value, u32 width)
+{
+	acpi_status status;
+	u32 i;
+
+	/* Truncate address to 16 bits if requested */
+
+	if (acpi_gbl_truncate_io_addresses) {
+		address &= ACPI_UINT16_MAX;
+	}
+
+	/* Validate the entire request and perform the I/O */
+
+	status = acpi_hw_validate_io_request(address, width);
+	if (ACPI_SUCCESS(status)) {
+		status = acpi_os_write_port(address, value, width);
+		return (status);
+	}
+
+	if (status != AE_AML_ILLEGAL_ADDRESS) {
+		return (status);
+	}
+
+	/*
+	 * There has been a protection violation within the request. Fall
+	 * back to byte granularity port I/O and ignore the failing bytes.
+	 * This provides compatibility with other ACPI implementations.
+	 */
+	for (i = 0; i < width; i += 8) {
+
+		/* Validate and write one byte */
+
+		if (acpi_hw_validate_io_request(address, 8) == AE_OK) {
+			status =
+			    acpi_os_write_port(address, (value >> i) & 0xFF, 8);
+			if (ACPI_FAILURE(status)) {
+				return (status);
+			}
+		}
+
+		address++;
+	}
+
+	return (AE_OK);
+}
+
+/******************************************************************************
+ *
+ * FUNCTION:    acpi_hw_validate_io_block
+ *
+ * PARAMETERS:  Address             Address of I/O port/register blobk
+ *              bit_width           Number of bits (8,16,32) in each register
+ *              count               Number of registers in the block
+ *
+ * RETURN:      Status
+ *
+ * DESCRIPTION: Validates a block of I/O ports/registers.
+ *
+ ******************************************************************************/
+
+acpi_status acpi_hw_validate_io_block(u64 address, u32 bit_width, u32 count)
+{
+	acpi_status status;
+
+	while (count--) {
+		status = acpi_hw_validate_io_request((acpi_io_address)address,
+						     bit_width);
+		if (ACPI_FAILURE(status))
+			return_ACPI_STATUS(status);
+
+		address += ACPI_DIV_8(bit_width);
+	}
+
+	return_ACPI_STATUS(AE_OK);
+}