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-rw-r--r--drivers/acpi/acpica/exregion.c544
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);
+}
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