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792 lines
21 KiB
792 lines
21 KiB
// SPDX-License-Identifier: GPL-2.0-only |
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/* |
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* APEI Error INJection support |
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* |
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* EINJ provides a hardware error injection mechanism, this is useful |
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* for debugging and testing of other APEI and RAS features. |
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* |
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* For more information about EINJ, please refer to ACPI Specification |
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* version 4.0, section 17.5. |
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* |
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* Copyright 2009-2010 Intel Corp. |
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* Author: Huang Ying <[email protected]> |
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*/ |
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|
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#include <linux/kernel.h> |
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#include <linux/module.h> |
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#include <linux/init.h> |
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#include <linux/io.h> |
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#include <linux/debugfs.h> |
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#include <linux/seq_file.h> |
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#include <linux/nmi.h> |
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#include <linux/delay.h> |
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#include <linux/mm.h> |
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#include <asm/unaligned.h> |
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|
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#include "apei-internal.h" |
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|
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#undef pr_fmt |
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#define pr_fmt(fmt) "EINJ: " fmt |
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|
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#define SPIN_UNIT 100 /* 100ns */ |
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/* Firmware should respond within 1 milliseconds */ |
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#define FIRMWARE_TIMEOUT (1 * NSEC_PER_MSEC) |
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#define ACPI5_VENDOR_BIT BIT(31) |
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#define MEM_ERROR_MASK (ACPI_EINJ_MEMORY_CORRECTABLE | \ |
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ACPI_EINJ_MEMORY_UNCORRECTABLE | \ |
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ACPI_EINJ_MEMORY_FATAL) |
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|
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/* |
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* ACPI version 5 provides a SET_ERROR_TYPE_WITH_ADDRESS action. |
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*/ |
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static int acpi5; |
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|
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struct set_error_type_with_address { |
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u32 type; |
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u32 vendor_extension; |
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u32 flags; |
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u32 apicid; |
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u64 memory_address; |
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u64 memory_address_range; |
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u32 pcie_sbdf; |
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}; |
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enum { |
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SETWA_FLAGS_APICID = 1, |
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SETWA_FLAGS_MEM = 2, |
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SETWA_FLAGS_PCIE_SBDF = 4, |
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}; |
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|
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/* |
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* Vendor extensions for platform specific operations |
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*/ |
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struct vendor_error_type_extension { |
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u32 length; |
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u32 pcie_sbdf; |
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u16 vendor_id; |
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u16 device_id; |
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u8 rev_id; |
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u8 reserved[3]; |
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}; |
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|
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static u32 notrigger; |
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|
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static u32 vendor_flags; |
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static struct debugfs_blob_wrapper vendor_blob; |
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static char vendor_dev[64]; |
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|
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/* |
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* Some BIOSes allow parameters to the SET_ERROR_TYPE entries in the |
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* EINJ table through an unpublished extension. Use with caution as |
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* most will ignore the parameter and make their own choice of address |
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* for error injection. This extension is used only if |
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* param_extension module parameter is specified. |
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*/ |
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struct einj_parameter { |
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u64 type; |
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u64 reserved1; |
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u64 reserved2; |
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u64 param1; |
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u64 param2; |
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}; |
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|
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#define EINJ_OP_BUSY 0x1 |
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#define EINJ_STATUS_SUCCESS 0x0 |
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#define EINJ_STATUS_FAIL 0x1 |
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#define EINJ_STATUS_INVAL 0x2 |
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|
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#define EINJ_TAB_ENTRY(tab) \ |
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((struct acpi_whea_header *)((char *)(tab) + \ |
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sizeof(struct acpi_table_einj))) |
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|
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static bool param_extension; |
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module_param(param_extension, bool, 0); |
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|
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static struct acpi_table_einj *einj_tab; |
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|
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static struct apei_resources einj_resources; |
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static struct apei_exec_ins_type einj_ins_type[] = { |
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[ACPI_EINJ_READ_REGISTER] = { |
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.flags = APEI_EXEC_INS_ACCESS_REGISTER, |
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.run = apei_exec_read_register, |
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}, |
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[ACPI_EINJ_READ_REGISTER_VALUE] = { |
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.flags = APEI_EXEC_INS_ACCESS_REGISTER, |
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.run = apei_exec_read_register_value, |
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}, |
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[ACPI_EINJ_WRITE_REGISTER] = { |
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.flags = APEI_EXEC_INS_ACCESS_REGISTER, |
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.run = apei_exec_write_register, |
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}, |
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[ACPI_EINJ_WRITE_REGISTER_VALUE] = { |
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.flags = APEI_EXEC_INS_ACCESS_REGISTER, |
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.run = apei_exec_write_register_value, |
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}, |
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[ACPI_EINJ_NOOP] = { |
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.flags = 0, |
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.run = apei_exec_noop, |
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}, |
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}; |
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|
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/* |
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* Prevent EINJ interpreter to run simultaneously, because the |
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* corresponding firmware implementation may not work properly when |
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* invoked simultaneously. |
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*/ |
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static DEFINE_MUTEX(einj_mutex); |
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|
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static void *einj_param; |
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|
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static void einj_exec_ctx_init(struct apei_exec_context *ctx) |
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{ |
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apei_exec_ctx_init(ctx, einj_ins_type, ARRAY_SIZE(einj_ins_type), |
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EINJ_TAB_ENTRY(einj_tab), einj_tab->entries); |
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} |
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|
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static int __einj_get_available_error_type(u32 *type) |
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{ |
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struct apei_exec_context ctx; |
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int rc; |
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einj_exec_ctx_init(&ctx); |
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rc = apei_exec_run(&ctx, ACPI_EINJ_GET_ERROR_TYPE); |
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if (rc) |
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return rc; |
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*type = apei_exec_ctx_get_output(&ctx); |
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return 0; |
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} |
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/* Get error injection capabilities of the platform */ |
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static int einj_get_available_error_type(u32 *type) |
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{ |
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int rc; |
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|
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mutex_lock(&einj_mutex); |
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rc = __einj_get_available_error_type(type); |
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mutex_unlock(&einj_mutex); |
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return rc; |
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} |
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static int einj_timedout(u64 *t) |
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{ |
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if ((s64)*t < SPIN_UNIT) { |
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pr_warn(FW_WARN "Firmware does not respond in time\n"); |
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return 1; |
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} |
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*t -= SPIN_UNIT; |
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ndelay(SPIN_UNIT); |
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touch_nmi_watchdog(); |
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return 0; |
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} |
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static void check_vendor_extension(u64 paddr, |
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struct set_error_type_with_address *v5param) |
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{ |
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int offset = v5param->vendor_extension; |
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struct vendor_error_type_extension *v; |
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u32 sbdf; |
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|
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if (!offset) |
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return; |
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v = acpi_os_map_iomem(paddr + offset, sizeof(*v)); |
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if (!v) |
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return; |
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sbdf = v->pcie_sbdf; |
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sprintf(vendor_dev, "%x:%x:%x.%x vendor_id=%x device_id=%x rev_id=%x\n", |
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sbdf >> 24, (sbdf >> 16) & 0xff, |
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(sbdf >> 11) & 0x1f, (sbdf >> 8) & 0x7, |
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v->vendor_id, v->device_id, v->rev_id); |
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acpi_os_unmap_iomem(v, sizeof(*v)); |
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} |
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static void *einj_get_parameter_address(void) |
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{ |
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int i; |
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u64 pa_v4 = 0, pa_v5 = 0; |
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struct acpi_whea_header *entry; |
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|
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entry = EINJ_TAB_ENTRY(einj_tab); |
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for (i = 0; i < einj_tab->entries; i++) { |
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if (entry->action == ACPI_EINJ_SET_ERROR_TYPE && |
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entry->instruction == ACPI_EINJ_WRITE_REGISTER && |
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entry->register_region.space_id == |
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ACPI_ADR_SPACE_SYSTEM_MEMORY) |
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pa_v4 = get_unaligned(&entry->register_region.address); |
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if (entry->action == ACPI_EINJ_SET_ERROR_TYPE_WITH_ADDRESS && |
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entry->instruction == ACPI_EINJ_WRITE_REGISTER && |
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entry->register_region.space_id == |
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ACPI_ADR_SPACE_SYSTEM_MEMORY) |
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pa_v5 = get_unaligned(&entry->register_region.address); |
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entry++; |
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} |
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if (pa_v5) { |
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struct set_error_type_with_address *v5param; |
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v5param = acpi_os_map_iomem(pa_v5, sizeof(*v5param)); |
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if (v5param) { |
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acpi5 = 1; |
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check_vendor_extension(pa_v5, v5param); |
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return v5param; |
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} |
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} |
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if (param_extension && pa_v4) { |
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struct einj_parameter *v4param; |
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v4param = acpi_os_map_iomem(pa_v4, sizeof(*v4param)); |
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if (!v4param) |
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return NULL; |
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if (v4param->reserved1 || v4param->reserved2) { |
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acpi_os_unmap_iomem(v4param, sizeof(*v4param)); |
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return NULL; |
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} |
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return v4param; |
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} |
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return NULL; |
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} |
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/* do sanity check to trigger table */ |
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static int einj_check_trigger_header(struct acpi_einj_trigger *trigger_tab) |
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{ |
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if (trigger_tab->header_size != sizeof(struct acpi_einj_trigger)) |
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return -EINVAL; |
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if (trigger_tab->table_size > PAGE_SIZE || |
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trigger_tab->table_size < trigger_tab->header_size) |
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return -EINVAL; |
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if (trigger_tab->entry_count != |
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(trigger_tab->table_size - trigger_tab->header_size) / |
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sizeof(struct acpi_einj_entry)) |
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return -EINVAL; |
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return 0; |
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} |
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static struct acpi_generic_address *einj_get_trigger_parameter_region( |
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struct acpi_einj_trigger *trigger_tab, u64 param1, u64 param2) |
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{ |
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int i; |
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struct acpi_whea_header *entry; |
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entry = (struct acpi_whea_header *) |
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((char *)trigger_tab + sizeof(struct acpi_einj_trigger)); |
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for (i = 0; i < trigger_tab->entry_count; i++) { |
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if (entry->action == ACPI_EINJ_TRIGGER_ERROR && |
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entry->instruction <= ACPI_EINJ_WRITE_REGISTER_VALUE && |
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entry->register_region.space_id == |
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ACPI_ADR_SPACE_SYSTEM_MEMORY && |
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(entry->register_region.address & param2) == (param1 & param2)) |
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return &entry->register_region; |
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entry++; |
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} |
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return NULL; |
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} |
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/* Execute instructions in trigger error action table */ |
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static int __einj_error_trigger(u64 trigger_paddr, u32 type, |
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u64 param1, u64 param2) |
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{ |
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struct acpi_einj_trigger *trigger_tab = NULL; |
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struct apei_exec_context trigger_ctx; |
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struct apei_resources trigger_resources; |
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struct acpi_whea_header *trigger_entry; |
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struct resource *r; |
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u32 table_size; |
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int rc = -EIO; |
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struct acpi_generic_address *trigger_param_region = NULL; |
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r = request_mem_region(trigger_paddr, sizeof(*trigger_tab), |
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"APEI EINJ Trigger Table"); |
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if (!r) { |
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pr_err("Can not request [mem %#010llx-%#010llx] for Trigger table\n", |
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(unsigned long long)trigger_paddr, |
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(unsigned long long)trigger_paddr + |
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sizeof(*trigger_tab) - 1); |
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goto out; |
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} |
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trigger_tab = ioremap_cache(trigger_paddr, sizeof(*trigger_tab)); |
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if (!trigger_tab) { |
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pr_err("Failed to map trigger table!\n"); |
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goto out_rel_header; |
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} |
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rc = einj_check_trigger_header(trigger_tab); |
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if (rc) { |
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pr_warn(FW_BUG "Invalid trigger error action table.\n"); |
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goto out_rel_header; |
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} |
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/* No action structures in the TRIGGER_ERROR table, nothing to do */ |
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if (!trigger_tab->entry_count) |
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goto out_rel_header; |
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rc = -EIO; |
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table_size = trigger_tab->table_size; |
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r = request_mem_region(trigger_paddr + sizeof(*trigger_tab), |
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table_size - sizeof(*trigger_tab), |
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"APEI EINJ Trigger Table"); |
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if (!r) { |
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pr_err("Can not request [mem %#010llx-%#010llx] for Trigger Table Entry\n", |
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(unsigned long long)trigger_paddr + sizeof(*trigger_tab), |
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(unsigned long long)trigger_paddr + table_size - 1); |
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goto out_rel_header; |
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} |
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iounmap(trigger_tab); |
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trigger_tab = ioremap_cache(trigger_paddr, table_size); |
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if (!trigger_tab) { |
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pr_err("Failed to map trigger table!\n"); |
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goto out_rel_entry; |
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} |
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trigger_entry = (struct acpi_whea_header *) |
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((char *)trigger_tab + sizeof(struct acpi_einj_trigger)); |
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apei_resources_init(&trigger_resources); |
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apei_exec_ctx_init(&trigger_ctx, einj_ins_type, |
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ARRAY_SIZE(einj_ins_type), |
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trigger_entry, trigger_tab->entry_count); |
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rc = apei_exec_collect_resources(&trigger_ctx, &trigger_resources); |
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if (rc) |
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goto out_fini; |
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rc = apei_resources_sub(&trigger_resources, &einj_resources); |
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if (rc) |
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goto out_fini; |
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/* |
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* Some firmware will access target address specified in |
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* param1 to trigger the error when injecting memory error. |
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* This will cause resource conflict with regular memory. So |
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* remove it from trigger table resources. |
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*/ |
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if ((param_extension || acpi5) && (type & MEM_ERROR_MASK) && param2) { |
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struct apei_resources addr_resources; |
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apei_resources_init(&addr_resources); |
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trigger_param_region = einj_get_trigger_parameter_region( |
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trigger_tab, param1, param2); |
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if (trigger_param_region) { |
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rc = apei_resources_add(&addr_resources, |
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trigger_param_region->address, |
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trigger_param_region->bit_width/8, true); |
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if (rc) |
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goto out_fini; |
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rc = apei_resources_sub(&trigger_resources, |
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&addr_resources); |
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} |
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apei_resources_fini(&addr_resources); |
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if (rc) |
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goto out_fini; |
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} |
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rc = apei_resources_request(&trigger_resources, "APEI EINJ Trigger"); |
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if (rc) |
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goto out_fini; |
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rc = apei_exec_pre_map_gars(&trigger_ctx); |
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if (rc) |
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goto out_release; |
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|
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rc = apei_exec_run(&trigger_ctx, ACPI_EINJ_TRIGGER_ERROR); |
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|
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apei_exec_post_unmap_gars(&trigger_ctx); |
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out_release: |
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apei_resources_release(&trigger_resources); |
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out_fini: |
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apei_resources_fini(&trigger_resources); |
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out_rel_entry: |
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release_mem_region(trigger_paddr + sizeof(*trigger_tab), |
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table_size - sizeof(*trigger_tab)); |
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out_rel_header: |
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release_mem_region(trigger_paddr, sizeof(*trigger_tab)); |
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out: |
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if (trigger_tab) |
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iounmap(trigger_tab); |
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|
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return rc; |
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} |
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|
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static int __einj_error_inject(u32 type, u32 flags, u64 param1, u64 param2, |
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u64 param3, u64 param4) |
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{ |
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struct apei_exec_context ctx; |
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u64 val, trigger_paddr, timeout = FIRMWARE_TIMEOUT; |
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int rc; |
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|
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einj_exec_ctx_init(&ctx); |
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|
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rc = apei_exec_run_optional(&ctx, ACPI_EINJ_BEGIN_OPERATION); |
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if (rc) |
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return rc; |
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apei_exec_ctx_set_input(&ctx, type); |
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if (acpi5) { |
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struct set_error_type_with_address *v5param = einj_param; |
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|
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v5param->type = type; |
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if (type & ACPI5_VENDOR_BIT) { |
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switch (vendor_flags) { |
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case SETWA_FLAGS_APICID: |
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v5param->apicid = param1; |
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break; |
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case SETWA_FLAGS_MEM: |
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v5param->memory_address = param1; |
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v5param->memory_address_range = param2; |
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break; |
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case SETWA_FLAGS_PCIE_SBDF: |
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v5param->pcie_sbdf = param1; |
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break; |
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} |
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v5param->flags = vendor_flags; |
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} else if (flags) { |
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v5param->flags = flags; |
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v5param->memory_address = param1; |
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v5param->memory_address_range = param2; |
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v5param->apicid = param3; |
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v5param->pcie_sbdf = param4; |
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} else { |
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switch (type) { |
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case ACPI_EINJ_PROCESSOR_CORRECTABLE: |
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case ACPI_EINJ_PROCESSOR_UNCORRECTABLE: |
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case ACPI_EINJ_PROCESSOR_FATAL: |
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v5param->apicid = param1; |
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v5param->flags = SETWA_FLAGS_APICID; |
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break; |
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case ACPI_EINJ_MEMORY_CORRECTABLE: |
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case ACPI_EINJ_MEMORY_UNCORRECTABLE: |
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case ACPI_EINJ_MEMORY_FATAL: |
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v5param->memory_address = param1; |
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v5param->memory_address_range = param2; |
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v5param->flags = SETWA_FLAGS_MEM; |
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break; |
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case ACPI_EINJ_PCIX_CORRECTABLE: |
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case ACPI_EINJ_PCIX_UNCORRECTABLE: |
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case ACPI_EINJ_PCIX_FATAL: |
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v5param->pcie_sbdf = param1; |
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v5param->flags = SETWA_FLAGS_PCIE_SBDF; |
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break; |
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} |
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} |
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} else { |
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rc = apei_exec_run(&ctx, ACPI_EINJ_SET_ERROR_TYPE); |
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if (rc) |
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return rc; |
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if (einj_param) { |
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struct einj_parameter *v4param = einj_param; |
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v4param->param1 = param1; |
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v4param->param2 = param2; |
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} |
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} |
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rc = apei_exec_run(&ctx, ACPI_EINJ_EXECUTE_OPERATION); |
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if (rc) |
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return rc; |
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for (;;) { |
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rc = apei_exec_run(&ctx, ACPI_EINJ_CHECK_BUSY_STATUS); |
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if (rc) |
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return rc; |
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val = apei_exec_ctx_get_output(&ctx); |
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if (!(val & EINJ_OP_BUSY)) |
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break; |
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if (einj_timedout(&timeout)) |
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return -EIO; |
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} |
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rc = apei_exec_run(&ctx, ACPI_EINJ_GET_COMMAND_STATUS); |
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if (rc) |
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return rc; |
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val = apei_exec_ctx_get_output(&ctx); |
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if (val != EINJ_STATUS_SUCCESS) |
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return -EBUSY; |
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|
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rc = apei_exec_run(&ctx, ACPI_EINJ_GET_TRIGGER_TABLE); |
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if (rc) |
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return rc; |
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trigger_paddr = apei_exec_ctx_get_output(&ctx); |
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if (notrigger == 0) { |
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rc = __einj_error_trigger(trigger_paddr, type, param1, param2); |
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if (rc) |
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return rc; |
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} |
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rc = apei_exec_run_optional(&ctx, ACPI_EINJ_END_OPERATION); |
|
|
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return rc; |
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} |
|
|
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/* Inject the specified hardware error */ |
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static int einj_error_inject(u32 type, u32 flags, u64 param1, u64 param2, |
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u64 param3, u64 param4) |
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{ |
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int rc; |
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u64 base_addr, size; |
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|
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/* If user manually set "flags", make sure it is legal */ |
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if (flags && (flags & |
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~(SETWA_FLAGS_APICID|SETWA_FLAGS_MEM|SETWA_FLAGS_PCIE_SBDF))) |
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return -EINVAL; |
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|
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/* |
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* We need extra sanity checks for memory errors. |
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* Other types leap directly to injection. |
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*/ |
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|
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/* ensure param1/param2 existed */ |
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if (!(param_extension || acpi5)) |
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goto inject; |
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|
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/* ensure injection is memory related */ |
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if (type & ACPI5_VENDOR_BIT) { |
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if (vendor_flags != SETWA_FLAGS_MEM) |
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goto inject; |
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} else if (!(type & MEM_ERROR_MASK) && !(flags & SETWA_FLAGS_MEM)) |
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goto inject; |
|
|
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/* |
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* Disallow crazy address masks that give BIOS leeway to pick |
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* injection address almost anywhere. Insist on page or |
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* better granularity and that target address is normal RAM or |
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* NVDIMM. |
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*/ |
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base_addr = param1 & param2; |
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size = ~param2 + 1; |
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|
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if (((param2 & PAGE_MASK) != PAGE_MASK) || |
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((region_intersects(base_addr, size, IORESOURCE_SYSTEM_RAM, IORES_DESC_NONE) |
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!= REGION_INTERSECTS) && |
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(region_intersects(base_addr, size, IORESOURCE_MEM, IORES_DESC_PERSISTENT_MEMORY) |
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!= REGION_INTERSECTS))) |
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return -EINVAL; |
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|
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inject: |
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mutex_lock(&einj_mutex); |
|
rc = __einj_error_inject(type, flags, param1, param2, param3, param4); |
|
mutex_unlock(&einj_mutex); |
|
|
|
return rc; |
|
} |
|
|
|
static u32 error_type; |
|
static u32 error_flags; |
|
static u64 error_param1; |
|
static u64 error_param2; |
|
static u64 error_param3; |
|
static u64 error_param4; |
|
static struct dentry *einj_debug_dir; |
|
|
|
static int available_error_type_show(struct seq_file *m, void *v) |
|
{ |
|
int rc; |
|
u32 available_error_type = 0; |
|
|
|
rc = einj_get_available_error_type(&available_error_type); |
|
if (rc) |
|
return rc; |
|
if (available_error_type & 0x0001) |
|
seq_printf(m, "0x00000001\tProcessor Correctable\n"); |
|
if (available_error_type & 0x0002) |
|
seq_printf(m, "0x00000002\tProcessor Uncorrectable non-fatal\n"); |
|
if (available_error_type & 0x0004) |
|
seq_printf(m, "0x00000004\tProcessor Uncorrectable fatal\n"); |
|
if (available_error_type & 0x0008) |
|
seq_printf(m, "0x00000008\tMemory Correctable\n"); |
|
if (available_error_type & 0x0010) |
|
seq_printf(m, "0x00000010\tMemory Uncorrectable non-fatal\n"); |
|
if (available_error_type & 0x0020) |
|
seq_printf(m, "0x00000020\tMemory Uncorrectable fatal\n"); |
|
if (available_error_type & 0x0040) |
|
seq_printf(m, "0x00000040\tPCI Express Correctable\n"); |
|
if (available_error_type & 0x0080) |
|
seq_printf(m, "0x00000080\tPCI Express Uncorrectable non-fatal\n"); |
|
if (available_error_type & 0x0100) |
|
seq_printf(m, "0x00000100\tPCI Express Uncorrectable fatal\n"); |
|
if (available_error_type & 0x0200) |
|
seq_printf(m, "0x00000200\tPlatform Correctable\n"); |
|
if (available_error_type & 0x0400) |
|
seq_printf(m, "0x00000400\tPlatform Uncorrectable non-fatal\n"); |
|
if (available_error_type & 0x0800) |
|
seq_printf(m, "0x00000800\tPlatform Uncorrectable fatal\n"); |
|
|
|
return 0; |
|
} |
|
|
|
DEFINE_SHOW_ATTRIBUTE(available_error_type); |
|
|
|
static int error_type_get(void *data, u64 *val) |
|
{ |
|
*val = error_type; |
|
|
|
return 0; |
|
} |
|
|
|
static int error_type_set(void *data, u64 val) |
|
{ |
|
int rc; |
|
u32 available_error_type = 0; |
|
u32 tval, vendor; |
|
|
|
/* |
|
* Vendor defined types have 0x80000000 bit set, and |
|
* are not enumerated by ACPI_EINJ_GET_ERROR_TYPE |
|
*/ |
|
vendor = val & ACPI5_VENDOR_BIT; |
|
tval = val & 0x7fffffff; |
|
|
|
/* Only one error type can be specified */ |
|
if (tval & (tval - 1)) |
|
return -EINVAL; |
|
if (!vendor) { |
|
rc = einj_get_available_error_type(&available_error_type); |
|
if (rc) |
|
return rc; |
|
if (!(val & available_error_type)) |
|
return -EINVAL; |
|
} |
|
error_type = val; |
|
|
|
return 0; |
|
} |
|
|
|
DEFINE_DEBUGFS_ATTRIBUTE(error_type_fops, error_type_get, error_type_set, |
|
"0x%llx\n"); |
|
|
|
static int error_inject_set(void *data, u64 val) |
|
{ |
|
if (!error_type) |
|
return -EINVAL; |
|
|
|
return einj_error_inject(error_type, error_flags, error_param1, error_param2, |
|
error_param3, error_param4); |
|
} |
|
|
|
DEFINE_DEBUGFS_ATTRIBUTE(error_inject_fops, NULL, error_inject_set, "%llu\n"); |
|
|
|
static int einj_check_table(struct acpi_table_einj *einj_tab) |
|
{ |
|
if ((einj_tab->header_length != |
|
(sizeof(struct acpi_table_einj) - sizeof(einj_tab->header))) |
|
&& (einj_tab->header_length != sizeof(struct acpi_table_einj))) |
|
return -EINVAL; |
|
if (einj_tab->header.length < sizeof(struct acpi_table_einj)) |
|
return -EINVAL; |
|
if (einj_tab->entries != |
|
(einj_tab->header.length - sizeof(struct acpi_table_einj)) / |
|
sizeof(struct acpi_einj_entry)) |
|
return -EINVAL; |
|
|
|
return 0; |
|
} |
|
|
|
static int __init einj_init(void) |
|
{ |
|
int rc; |
|
acpi_status status; |
|
struct apei_exec_context ctx; |
|
|
|
if (acpi_disabled) { |
|
pr_warn("ACPI disabled.\n"); |
|
return -ENODEV; |
|
} |
|
|
|
status = acpi_get_table(ACPI_SIG_EINJ, 0, |
|
(struct acpi_table_header **)&einj_tab); |
|
if (status == AE_NOT_FOUND) { |
|
pr_warn("EINJ table not found.\n"); |
|
return -ENODEV; |
|
} |
|
else if (ACPI_FAILURE(status)) { |
|
pr_err("Failed to get EINJ table: %s\n", |
|
acpi_format_exception(status)); |
|
return -EINVAL; |
|
} |
|
|
|
rc = einj_check_table(einj_tab); |
|
if (rc) { |
|
pr_warn(FW_BUG "Invalid EINJ table.\n"); |
|
goto err_put_table; |
|
} |
|
|
|
rc = -ENOMEM; |
|
einj_debug_dir = debugfs_create_dir("einj", apei_get_debugfs_dir()); |
|
|
|
debugfs_create_file("available_error_type", S_IRUSR, einj_debug_dir, |
|
NULL, &available_error_type_fops); |
|
debugfs_create_file_unsafe("error_type", 0600, einj_debug_dir, |
|
NULL, &error_type_fops); |
|
debugfs_create_file_unsafe("error_inject", 0200, einj_debug_dir, |
|
NULL, &error_inject_fops); |
|
|
|
apei_resources_init(&einj_resources); |
|
einj_exec_ctx_init(&ctx); |
|
rc = apei_exec_collect_resources(&ctx, &einj_resources); |
|
if (rc) { |
|
pr_err("Error collecting EINJ resources.\n"); |
|
goto err_fini; |
|
} |
|
|
|
rc = apei_resources_request(&einj_resources, "APEI EINJ"); |
|
if (rc) { |
|
pr_err("Error requesting memory/port resources.\n"); |
|
goto err_fini; |
|
} |
|
|
|
rc = apei_exec_pre_map_gars(&ctx); |
|
if (rc) { |
|
pr_err("Error pre-mapping GARs.\n"); |
|
goto err_release; |
|
} |
|
|
|
einj_param = einj_get_parameter_address(); |
|
if ((param_extension || acpi5) && einj_param) { |
|
debugfs_create_x32("flags", S_IRUSR | S_IWUSR, einj_debug_dir, |
|
&error_flags); |
|
debugfs_create_x64("param1", S_IRUSR | S_IWUSR, einj_debug_dir, |
|
&error_param1); |
|
debugfs_create_x64("param2", S_IRUSR | S_IWUSR, einj_debug_dir, |
|
&error_param2); |
|
debugfs_create_x64("param3", S_IRUSR | S_IWUSR, einj_debug_dir, |
|
&error_param3); |
|
debugfs_create_x64("param4", S_IRUSR | S_IWUSR, einj_debug_dir, |
|
&error_param4); |
|
debugfs_create_x32("notrigger", S_IRUSR | S_IWUSR, |
|
einj_debug_dir, ¬rigger); |
|
} |
|
|
|
if (vendor_dev[0]) { |
|
vendor_blob.data = vendor_dev; |
|
vendor_blob.size = strlen(vendor_dev); |
|
debugfs_create_blob("vendor", S_IRUSR, einj_debug_dir, |
|
&vendor_blob); |
|
debugfs_create_x32("vendor_flags", S_IRUSR | S_IWUSR, |
|
einj_debug_dir, &vendor_flags); |
|
} |
|
|
|
pr_info("Error INJection is initialized.\n"); |
|
|
|
return 0; |
|
|
|
err_release: |
|
apei_resources_release(&einj_resources); |
|
err_fini: |
|
apei_resources_fini(&einj_resources); |
|
debugfs_remove_recursive(einj_debug_dir); |
|
err_put_table: |
|
acpi_put_table((struct acpi_table_header *)einj_tab); |
|
|
|
return rc; |
|
} |
|
|
|
static void __exit einj_exit(void) |
|
{ |
|
struct apei_exec_context ctx; |
|
|
|
if (einj_param) { |
|
acpi_size size = (acpi5) ? |
|
sizeof(struct set_error_type_with_address) : |
|
sizeof(struct einj_parameter); |
|
|
|
acpi_os_unmap_iomem(einj_param, size); |
|
} |
|
einj_exec_ctx_init(&ctx); |
|
apei_exec_post_unmap_gars(&ctx); |
|
apei_resources_release(&einj_resources); |
|
apei_resources_fini(&einj_resources); |
|
debugfs_remove_recursive(einj_debug_dir); |
|
acpi_put_table((struct acpi_table_header *)einj_tab); |
|
} |
|
|
|
module_init(einj_init); |
|
module_exit(einj_exit); |
|
|
|
MODULE_AUTHOR("Huang Ying"); |
|
MODULE_DESCRIPTION("APEI Error INJection support"); |
|
MODULE_LICENSE("GPL");
|
|
|