Orange Pi5 kernel

^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300   1) // SPDX-License-Identifier: BSD-3-Clause OR GPL-2.0
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300   2) /******************************************************************************
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300   3)  *
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300   4)  * Module Name: hwvalid - I/O request validation
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300   5)  *
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300   6)  * Copyright (C) 2000 - 2020, Intel Corp.
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300   7)  *
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300   8)  *****************************************************************************/
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300   9) 
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  10) #include <acpi/acpi.h>
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  11) #include "accommon.h"
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  12) 
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  13) #define _COMPONENT          ACPI_HARDWARE
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  14) ACPI_MODULE_NAME("hwvalid")
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  15) 
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  16) /* Local prototypes */
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  17) static acpi_status
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  18) acpi_hw_validate_io_request(acpi_io_address address, u32 bit_width);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  19) 
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  20) /*
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  21)  * Protected I/O ports. Some ports are always illegal, and some are
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  22)  * conditionally illegal. This table must remain ordered by port address.
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  23)  *
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  24)  * The table is used to implement the Microsoft port access rules that
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  25)  * first appeared in Windows XP. Some ports are always illegal, and some
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  26)  * ports are only illegal if the BIOS calls _OSI with a win_XP string or
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  27)  * later (meaning that the BIOS itelf is post-XP.)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  28)  *
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  29)  * This provides ACPICA with the desired port protections and
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  30)  * Microsoft compatibility.
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  31)  *
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  32)  * Description of port entries:
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  33)  *  DMA:   DMA controller
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  34)  *  PIC0:  Programmable Interrupt Controller (8259A)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  35)  *  PIT1:  System Timer 1
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  36)  *  PIT2:  System Timer 2 failsafe
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  37)  *  RTC:   Real-time clock
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  38)  *  CMOS:  Extended CMOS
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  39)  *  DMA1:  DMA 1 page registers
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  40)  *  DMA1L: DMA 1 Ch 0 low page
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  41)  *  DMA2:  DMA 2 page registers
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  42)  *  DMA2L: DMA 2 low page refresh
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  43)  *  ARBC:  Arbitration control
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  44)  *  SETUP: Reserved system board setup
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  45)  *  POS:   POS channel select
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  46)  *  PIC1:  Cascaded PIC
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  47)  *  IDMA:  ISA DMA
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  48)  *  ELCR:  PIC edge/level registers
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  49)  *  PCI:   PCI configuration space
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  50)  */
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  51) static const struct acpi_port_info acpi_protected_ports[] = {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  52) 	{"DMA", 0x0000, 0x000F, ACPI_OSI_WIN_XP},
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  53) 	{"PIC0", 0x0020, 0x0021, ACPI_ALWAYS_ILLEGAL},
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  54) 	{"PIT1", 0x0040, 0x0043, ACPI_OSI_WIN_XP},
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  55) 	{"PIT2", 0x0048, 0x004B, ACPI_OSI_WIN_XP},
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  56) 	{"RTC", 0x0070, 0x0071, ACPI_OSI_WIN_XP},
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  57) 	{"CMOS", 0x0074, 0x0076, ACPI_OSI_WIN_XP},
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  58) 	{"DMA1", 0x0081, 0x0083, ACPI_OSI_WIN_XP},
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  59) 	{"DMA1L", 0x0087, 0x0087, ACPI_OSI_WIN_XP},
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  60) 	{"DMA2", 0x0089, 0x008B, ACPI_OSI_WIN_XP},
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  61) 	{"DMA2L", 0x008F, 0x008F, ACPI_OSI_WIN_XP},
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  62) 	{"ARBC", 0x0090, 0x0091, ACPI_OSI_WIN_XP},
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  63) 	{"SETUP", 0x0093, 0x0094, ACPI_OSI_WIN_XP},
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  64) 	{"POS", 0x0096, 0x0097, ACPI_OSI_WIN_XP},
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  65) 	{"PIC1", 0x00A0, 0x00A1, ACPI_ALWAYS_ILLEGAL},
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  66) 	{"IDMA", 0x00C0, 0x00DF, ACPI_OSI_WIN_XP},
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  67) 	{"ELCR", 0x04D0, 0x04D1, ACPI_ALWAYS_ILLEGAL},
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  68) 	{"PCI", 0x0CF8, 0x0CFF, ACPI_OSI_WIN_XP}
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  69) };
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  70) 
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  71) #define ACPI_PORT_INFO_ENTRIES      ACPI_ARRAY_LENGTH (acpi_protected_ports)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  72) 
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  73) /******************************************************************************
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  74)  *
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  75)  * FUNCTION:    acpi_hw_validate_io_request
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  76)  *
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  77)  * PARAMETERS:  Address             Address of I/O port/register
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  78)  *              bit_width           Number of bits (8,16,32)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  79)  *
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  80)  * RETURN:      Status
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  81)  *
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  82)  * DESCRIPTION: Validates an I/O request (address/length). Certain ports are
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  83)  *              always illegal and some ports are only illegal depending on
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  84)  *              the requests the BIOS AML code makes to the predefined
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  85)  *              _OSI method.
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  86)  *
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  87)  ******************************************************************************/
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  88) 
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  89) static acpi_status
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  90) acpi_hw_validate_io_request(acpi_io_address address, u32 bit_width)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  91) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  92) 	u32 i;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  93) 	u32 byte_width;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  94) 	acpi_io_address last_address;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  95) 	const struct acpi_port_info *port_info;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  96) 
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  97) 	ACPI_FUNCTION_TRACE(hw_validate_io_request);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  98) 
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  99) 	/* Supported widths are 8/16/32 */
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 100) 
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 101) 	if ((bit_width != 8) && (bit_width != 16) && (bit_width != 32)) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 102) 		ACPI_ERROR((AE_INFO,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 103) 			    "Bad BitWidth parameter: %8.8X", bit_width));
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 104) 		return_ACPI_STATUS(AE_BAD_PARAMETER);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 105) 	}
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 106) 
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 107) 	port_info = acpi_protected_ports;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 108) 	byte_width = ACPI_DIV_8(bit_width);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 109) 	last_address = address + byte_width - 1;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 110) 
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 111) 	ACPI_DEBUG_PRINT((ACPI_DB_IO,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 112) 			  "Address %8.8X%8.8X LastAddress %8.8X%8.8X Length %X",
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 113) 			  ACPI_FORMAT_UINT64(address),
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 114) 			  ACPI_FORMAT_UINT64(last_address), byte_width));
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 115) 
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 116) 	/* Maximum 16-bit address in I/O space */
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 117) 
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 118) 	if (last_address > ACPI_UINT16_MAX) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 119) 		ACPI_ERROR((AE_INFO,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 120) 			    "Illegal I/O port address/length above 64K: %8.8X%8.8X/0x%X",
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 121) 			    ACPI_FORMAT_UINT64(address), byte_width));
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 122) 		return_ACPI_STATUS(AE_LIMIT);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 123) 	}
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 124) 
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 125) 	/* Exit if requested address is not within the protected port table */
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 126) 
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 127) 	if (address > acpi_protected_ports[ACPI_PORT_INFO_ENTRIES - 1].end) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 128) 		return_ACPI_STATUS(AE_OK);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 129) 	}
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 130) 
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 131) 	/* Check request against the list of protected I/O ports */
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 132) 
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 133) 	for (i = 0; i < ACPI_PORT_INFO_ENTRIES; i++, port_info++) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 134) 		/*
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 135) 		 * Check if the requested address range will write to a reserved
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 136) 		 * port. There are four cases to consider:
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 137) 		 *
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 138) 		 * 1) Address range is contained completely in the port address range
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 139) 		 * 2) Address range overlaps port range at the port range start
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 140) 		 * 3) Address range overlaps port range at the port range end
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 141) 		 * 4) Address range completely encompasses the port range
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 142) 		 */
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 143) 		if ((address <= port_info->end)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 144) 		    && (last_address >= port_info->start)) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 145) 
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 146) 			/* Port illegality may depend on the _OSI calls made by the BIOS */
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 147) 
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 148) 			if (acpi_gbl_osi_data >= port_info->osi_dependency) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 149) 				ACPI_DEBUG_PRINT((ACPI_DB_VALUES,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 150) 						  "Denied AML access to port 0x%8.8X%8.8X/%X (%s 0x%.4X-0x%.4X)\n",
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 151) 						  ACPI_FORMAT_UINT64(address),
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 152) 						  byte_width, port_info->name,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 153) 						  port_info->start,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 154) 						  port_info->end));
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 155) 
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 156) 				return_ACPI_STATUS(AE_AML_ILLEGAL_ADDRESS);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 157) 			}
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 158) 		}
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 159) 
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 160) 		/* Finished if address range ends before the end of this port */
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 161) 
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 162) 		if (last_address <= port_info->end) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 163) 			break;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 164) 		}
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 165) 	}
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 166) 
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 167) 	return_ACPI_STATUS(AE_OK);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 168) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 169) 
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 170) /******************************************************************************
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 171)  *
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 172)  * FUNCTION:    acpi_hw_read_port
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 173)  *
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 174)  * PARAMETERS:  Address             Address of I/O port/register to read
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 175)  *              Value               Where value (data) is returned
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 176)  *              Width               Number of bits
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 177)  *
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 178)  * RETURN:      Status and value read from port
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 179)  *
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 180)  * DESCRIPTION: Read data from an I/O port or register. This is a front-end
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 181)  *              to acpi_os_read_port that performs validation on both the port
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 182)  *              address and the length.
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 183)  *
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 184)  *****************************************************************************/
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 185) 
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 186) acpi_status acpi_hw_read_port(acpi_io_address address, u32 *value, u32 width)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 187) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 188) 	acpi_status status;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 189) 	u32 one_byte;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 190) 	u32 i;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 191) 
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 192) 	/* Truncate address to 16 bits if requested */
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 193) 
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 194) 	if (acpi_gbl_truncate_io_addresses) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 195) 		address &= ACPI_UINT16_MAX;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 196) 	}
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 197) 
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 198) 	/* Validate the entire request and perform the I/O */
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 199) 
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 200) 	status = acpi_hw_validate_io_request(address, width);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 201) 	if (ACPI_SUCCESS(status)) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 202) 		status = acpi_os_read_port(address, value, width);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 203) 		return (status);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 204) 	}
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 205) 
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 206) 	if (status != AE_AML_ILLEGAL_ADDRESS) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 207) 		return (status);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 208) 	}
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 209) 
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 210) 	/*
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 211) 	 * There has been a protection violation within the request. Fall
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 212) 	 * back to byte granularity port I/O and ignore the failing bytes.
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 213) 	 * This provides compatibility with other ACPI implementations.
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 214) 	 */
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 215) 	for (i = 0, *value = 0; i < width; i += 8) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 216) 
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 217) 		/* Validate and read one byte */
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 218) 
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 219) 		if (acpi_hw_validate_io_request(address, 8) == AE_OK) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 220) 			status = acpi_os_read_port(address, &one_byte, 8);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 221) 			if (ACPI_FAILURE(status)) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 222) 				return (status);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 223) 			}
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 224) 
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 225) 			*value |= (one_byte << i);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 226) 		}
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 227) 
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 228) 		address++;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 229) 	}
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 230) 
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 231) 	return (AE_OK);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 232) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 233) 
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 234) /******************************************************************************
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 235)  *
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 236)  * FUNCTION:    acpi_hw_write_port
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 237)  *
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 238)  * PARAMETERS:  Address             Address of I/O port/register to write
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 239)  *              Value               Value to write
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 240)  *              Width               Number of bits
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 241)  *
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 242)  * RETURN:      Status
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 243)  *
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 244)  * DESCRIPTION: Write data to an I/O port or register. This is a front-end
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 245)  *              to acpi_os_write_port that performs validation on both the port
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 246)  *              address and the length.
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 247)  *
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 248)  *****************************************************************************/
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 249) 
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 250) acpi_status acpi_hw_write_port(acpi_io_address address, u32 value, u32 width)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 251) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 252) 	acpi_status status;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 253) 	u32 i;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 254) 
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 255) 	/* Truncate address to 16 bits if requested */
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 256) 
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 257) 	if (acpi_gbl_truncate_io_addresses) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 258) 		address &= ACPI_UINT16_MAX;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 259) 	}
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 260) 
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 261) 	/* Validate the entire request and perform the I/O */
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 262) 
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 263) 	status = acpi_hw_validate_io_request(address, width);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 264) 	if (ACPI_SUCCESS(status)) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 265) 		status = acpi_os_write_port(address, value, width);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 266) 		return (status);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 267) 	}
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 268) 
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 269) 	if (status != AE_AML_ILLEGAL_ADDRESS) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 270) 		return (status);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 271) 	}
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 272) 
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 273) 	/*
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 274) 	 * There has been a protection violation within the request. Fall
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 275) 	 * back to byte granularity port I/O and ignore the failing bytes.
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 276) 	 * This provides compatibility with other ACPI implementations.
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 277) 	 */
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 278) 	for (i = 0; i < width; i += 8) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 279) 
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 280) 		/* Validate and write one byte */
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 281) 
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 282) 		if (acpi_hw_validate_io_request(address, 8) == AE_OK) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 283) 			status =
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 284) 			    acpi_os_write_port(address, (value >> i) & 0xFF, 8);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 285) 			if (ACPI_FAILURE(status)) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 286) 				return (status);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 287) 			}
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 288) 		}
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 289) 
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 290) 		address++;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 291) 	}
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 292) 
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 293) 	return (AE_OK);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 294) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 295) 
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 296) /******************************************************************************
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 297)  *
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 298)  * FUNCTION:    acpi_hw_validate_io_block
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 299)  *
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 300)  * PARAMETERS:  Address             Address of I/O port/register blobk
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 301)  *              bit_width           Number of bits (8,16,32) in each register
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 302)  *              count               Number of registers in the block
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 303)  *
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 304)  * RETURN:      Status
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 305)  *
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 306)  * DESCRIPTION: Validates a block of I/O ports/registers.
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 307)  *
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 308)  ******************************************************************************/
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 309) 
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 310) acpi_status acpi_hw_validate_io_block(u64 address, u32 bit_width, u32 count)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 311) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 312) 	acpi_status status;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 313) 
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 314) 	while (count--) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 315) 		status = acpi_hw_validate_io_request((acpi_io_address)address,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 316) 						     bit_width);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 317) 		if (ACPI_FAILURE(status))
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 318) 			return_ACPI_STATUS(status);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 319) 
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 320) 		address += ACPI_DIV_8(bit_width);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 321) 	}
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 322) 
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 323) 	return_ACPI_STATUS(AE_OK);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 324) }