diff options
author | Daniel Baumann <daniel.baumann@progress-linux.org> | 2024-08-07 13:11:27 +0000 |
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committer | Daniel Baumann <daniel.baumann@progress-linux.org> | 2024-08-07 13:11:27 +0000 |
commit | 34996e42f82bfd60bc2c191e5cae3c6ab233ec6c (patch) | |
tree | 62db60558cbf089714b48daeabca82bf2b20b20e /drivers/acpi/apei/einj.c | |
parent | Adding debian version 6.8.12-1. (diff) | |
download | linux-34996e42f82bfd60bc2c191e5cae3c6ab233ec6c.tar.xz linux-34996e42f82bfd60bc2c191e5cae3c6ab233ec6c.zip |
Merging upstream version 6.9.7.
Signed-off-by: Daniel Baumann <daniel.baumann@progress-linux.org>
Diffstat (limited to 'drivers/acpi/apei/einj.c')
-rw-r--r-- | drivers/acpi/apei/einj.c | 834 |
1 files changed, 0 insertions, 834 deletions
diff --git a/drivers/acpi/apei/einj.c b/drivers/acpi/apei/einj.c deleted file mode 100644 index 89fb9331c6..0000000000 --- a/drivers/acpi/apei/einj.c +++ /dev/null @@ -1,834 +0,0 @@ -// SPDX-License-Identifier: GPL-2.0-only -/* - * APEI Error INJection support - * - * EINJ provides a hardware error injection mechanism, this is useful - * for debugging and testing of other APEI and RAS features. - * - * For more information about EINJ, please refer to ACPI Specification - * version 4.0, section 17.5. - * - * Copyright 2009-2010 Intel Corp. - * Author: Huang Ying <ying.huang@intel.com> - */ - -#include <linux/kernel.h> -#include <linux/module.h> -#include <linux/init.h> -#include <linux/io.h> -#include <linux/debugfs.h> -#include <linux/seq_file.h> -#include <linux/nmi.h> -#include <linux/delay.h> -#include <linux/mm.h> -#include <asm/unaligned.h> - -#include "apei-internal.h" - -#undef pr_fmt -#define pr_fmt(fmt) "EINJ: " fmt - -#define SLEEP_UNIT_MIN 1000 /* 1ms */ -#define SLEEP_UNIT_MAX 5000 /* 5ms */ -/* Firmware should respond within 1 seconds */ -#define FIRMWARE_TIMEOUT (1 * USEC_PER_SEC) -#define ACPI5_VENDOR_BIT BIT(31) -#define MEM_ERROR_MASK (ACPI_EINJ_MEMORY_CORRECTABLE | \ - ACPI_EINJ_MEMORY_UNCORRECTABLE | \ - ACPI_EINJ_MEMORY_FATAL) - -/* - * ACPI version 5 provides a SET_ERROR_TYPE_WITH_ADDRESS action. - */ -static int acpi5; - -struct set_error_type_with_address { - u32 type; - u32 vendor_extension; - u32 flags; - u32 apicid; - u64 memory_address; - u64 memory_address_range; - u32 pcie_sbdf; -}; -enum { - SETWA_FLAGS_APICID = 1, - SETWA_FLAGS_MEM = 2, - SETWA_FLAGS_PCIE_SBDF = 4, -}; - -/* - * Vendor extensions for platform specific operations - */ -struct vendor_error_type_extension { - u32 length; - u32 pcie_sbdf; - u16 vendor_id; - u16 device_id; - u8 rev_id; - u8 reserved[3]; -}; - -static u32 notrigger; - -static u32 vendor_flags; -static struct debugfs_blob_wrapper vendor_blob; -static struct debugfs_blob_wrapper vendor_errors; -static char vendor_dev[64]; - -/* - * Some BIOSes allow parameters to the SET_ERROR_TYPE entries in the - * EINJ table through an unpublished extension. Use with caution as - * most will ignore the parameter and make their own choice of address - * for error injection. This extension is used only if - * param_extension module parameter is specified. - */ -struct einj_parameter { - u64 type; - u64 reserved1; - u64 reserved2; - u64 param1; - u64 param2; -}; - -#define EINJ_OP_BUSY 0x1 -#define EINJ_STATUS_SUCCESS 0x0 -#define EINJ_STATUS_FAIL 0x1 -#define EINJ_STATUS_INVAL 0x2 - -#define EINJ_TAB_ENTRY(tab) \ - ((struct acpi_whea_header *)((char *)(tab) + \ - sizeof(struct acpi_table_einj))) - -static bool param_extension; -module_param(param_extension, bool, 0); - -static struct acpi_table_einj *einj_tab; - -static struct apei_resources einj_resources; - -static struct apei_exec_ins_type einj_ins_type[] = { - [ACPI_EINJ_READ_REGISTER] = { - .flags = APEI_EXEC_INS_ACCESS_REGISTER, - .run = apei_exec_read_register, - }, - [ACPI_EINJ_READ_REGISTER_VALUE] = { - .flags = APEI_EXEC_INS_ACCESS_REGISTER, - .run = apei_exec_read_register_value, - }, - [ACPI_EINJ_WRITE_REGISTER] = { - .flags = APEI_EXEC_INS_ACCESS_REGISTER, - .run = apei_exec_write_register, - }, - [ACPI_EINJ_WRITE_REGISTER_VALUE] = { - .flags = APEI_EXEC_INS_ACCESS_REGISTER, - .run = apei_exec_write_register_value, - }, - [ACPI_EINJ_NOOP] = { - .flags = 0, - .run = apei_exec_noop, - }, -}; - -/* - * Prevent EINJ interpreter to run simultaneously, because the - * corresponding firmware implementation may not work properly when - * invoked simultaneously. - */ -static DEFINE_MUTEX(einj_mutex); - -static void *einj_param; - -static void einj_exec_ctx_init(struct apei_exec_context *ctx) -{ - apei_exec_ctx_init(ctx, einj_ins_type, ARRAY_SIZE(einj_ins_type), - EINJ_TAB_ENTRY(einj_tab), einj_tab->entries); -} - -static int __einj_get_available_error_type(u32 *type) -{ - struct apei_exec_context ctx; - int rc; - - einj_exec_ctx_init(&ctx); - rc = apei_exec_run(&ctx, ACPI_EINJ_GET_ERROR_TYPE); - if (rc) - return rc; - *type = apei_exec_ctx_get_output(&ctx); - - return 0; -} - -/* Get error injection capabilities of the platform */ -static int einj_get_available_error_type(u32 *type) -{ - int rc; - - mutex_lock(&einj_mutex); - rc = __einj_get_available_error_type(type); - mutex_unlock(&einj_mutex); - - return rc; -} - -static int einj_timedout(u64 *t) -{ - if ((s64)*t < SLEEP_UNIT_MIN) { - pr_warn(FW_WARN "Firmware does not respond in time\n"); - return 1; - } - *t -= SLEEP_UNIT_MIN; - usleep_range(SLEEP_UNIT_MIN, SLEEP_UNIT_MAX); - - return 0; -} - -static void get_oem_vendor_struct(u64 paddr, int offset, - struct vendor_error_type_extension *v) -{ - unsigned long vendor_size; - u64 target_pa = paddr + offset + sizeof(struct vendor_error_type_extension); - - vendor_size = v->length - sizeof(struct vendor_error_type_extension); - - if (vendor_size) - vendor_errors.data = acpi_os_map_memory(target_pa, vendor_size); - - if (vendor_errors.data) - vendor_errors.size = vendor_size; -} - -static void check_vendor_extension(u64 paddr, - struct set_error_type_with_address *v5param) -{ - int offset = v5param->vendor_extension; - struct vendor_error_type_extension *v; - u32 sbdf; - - if (!offset) - return; - v = acpi_os_map_iomem(paddr + offset, sizeof(*v)); - if (!v) - return; - get_oem_vendor_struct(paddr, offset, v); - sbdf = v->pcie_sbdf; - sprintf(vendor_dev, "%x:%x:%x.%x vendor_id=%x device_id=%x rev_id=%x\n", - sbdf >> 24, (sbdf >> 16) & 0xff, - (sbdf >> 11) & 0x1f, (sbdf >> 8) & 0x7, - v->vendor_id, v->device_id, v->rev_id); - acpi_os_unmap_iomem(v, sizeof(*v)); -} - -static void *einj_get_parameter_address(void) -{ - int i; - u64 pa_v4 = 0, pa_v5 = 0; - struct acpi_whea_header *entry; - - entry = EINJ_TAB_ENTRY(einj_tab); - for (i = 0; i < einj_tab->entries; i++) { - if (entry->action == ACPI_EINJ_SET_ERROR_TYPE && - entry->instruction == ACPI_EINJ_WRITE_REGISTER && - entry->register_region.space_id == - ACPI_ADR_SPACE_SYSTEM_MEMORY) - pa_v4 = get_unaligned(&entry->register_region.address); - if (entry->action == ACPI_EINJ_SET_ERROR_TYPE_WITH_ADDRESS && - entry->instruction == ACPI_EINJ_WRITE_REGISTER && - entry->register_region.space_id == - ACPI_ADR_SPACE_SYSTEM_MEMORY) - pa_v5 = get_unaligned(&entry->register_region.address); - entry++; - } - if (pa_v5) { - struct set_error_type_with_address *v5param; - - v5param = acpi_os_map_iomem(pa_v5, sizeof(*v5param)); - if (v5param) { - acpi5 = 1; - check_vendor_extension(pa_v5, v5param); - return v5param; - } - } - if (param_extension && pa_v4) { - struct einj_parameter *v4param; - - v4param = acpi_os_map_iomem(pa_v4, sizeof(*v4param)); - if (!v4param) - return NULL; - if (v4param->reserved1 || v4param->reserved2) { - acpi_os_unmap_iomem(v4param, sizeof(*v4param)); - return NULL; - } - return v4param; - } - - return NULL; -} - -/* do sanity check to trigger table */ -static int einj_check_trigger_header(struct acpi_einj_trigger *trigger_tab) -{ - if (trigger_tab->header_size != sizeof(struct acpi_einj_trigger)) - return -EINVAL; - if (trigger_tab->table_size > PAGE_SIZE || - trigger_tab->table_size < trigger_tab->header_size) - return -EINVAL; - if (trigger_tab->entry_count != - (trigger_tab->table_size - trigger_tab->header_size) / - sizeof(struct acpi_einj_entry)) - return -EINVAL; - - return 0; -} - -static struct acpi_generic_address *einj_get_trigger_parameter_region( - struct acpi_einj_trigger *trigger_tab, u64 param1, u64 param2) -{ - int i; - struct acpi_whea_header *entry; - - entry = (struct acpi_whea_header *) - ((char *)trigger_tab + sizeof(struct acpi_einj_trigger)); - for (i = 0; i < trigger_tab->entry_count; i++) { - if (entry->action == ACPI_EINJ_TRIGGER_ERROR && - entry->instruction <= ACPI_EINJ_WRITE_REGISTER_VALUE && - entry->register_region.space_id == - ACPI_ADR_SPACE_SYSTEM_MEMORY && - (entry->register_region.address & param2) == (param1 & param2)) - return &entry->register_region; - entry++; - } - - return NULL; -} -/* Execute instructions in trigger error action table */ -static int __einj_error_trigger(u64 trigger_paddr, u32 type, - u64 param1, u64 param2) -{ - struct acpi_einj_trigger *trigger_tab = NULL; - struct apei_exec_context trigger_ctx; - struct apei_resources trigger_resources; - struct acpi_whea_header *trigger_entry; - struct resource *r; - u32 table_size; - int rc = -EIO; - struct acpi_generic_address *trigger_param_region = NULL; - - r = request_mem_region(trigger_paddr, sizeof(*trigger_tab), - "APEI EINJ Trigger Table"); - if (!r) { - pr_err("Can not request [mem %#010llx-%#010llx] for Trigger table\n", - (unsigned long long)trigger_paddr, - (unsigned long long)trigger_paddr + - sizeof(*trigger_tab) - 1); - goto out; - } - trigger_tab = ioremap_cache(trigger_paddr, sizeof(*trigger_tab)); - if (!trigger_tab) { - pr_err("Failed to map trigger table!\n"); - goto out_rel_header; - } - rc = einj_check_trigger_header(trigger_tab); - if (rc) { - pr_warn(FW_BUG "Invalid trigger error action table.\n"); - goto out_rel_header; - } - - /* No action structures in the TRIGGER_ERROR table, nothing to do */ - if (!trigger_tab->entry_count) - goto out_rel_header; - - rc = -EIO; - table_size = trigger_tab->table_size; - r = request_mem_region(trigger_paddr + sizeof(*trigger_tab), - table_size - sizeof(*trigger_tab), - "APEI EINJ Trigger Table"); - if (!r) { - pr_err("Can not request [mem %#010llx-%#010llx] for Trigger Table Entry\n", - (unsigned long long)trigger_paddr + sizeof(*trigger_tab), - (unsigned long long)trigger_paddr + table_size - 1); - goto out_rel_header; - } - iounmap(trigger_tab); - trigger_tab = ioremap_cache(trigger_paddr, table_size); - if (!trigger_tab) { - pr_err("Failed to map trigger table!\n"); - goto out_rel_entry; - } - trigger_entry = (struct acpi_whea_header *) - ((char *)trigger_tab + sizeof(struct acpi_einj_trigger)); - apei_resources_init(&trigger_resources); - apei_exec_ctx_init(&trigger_ctx, einj_ins_type, - ARRAY_SIZE(einj_ins_type), - trigger_entry, trigger_tab->entry_count); - rc = apei_exec_collect_resources(&trigger_ctx, &trigger_resources); - if (rc) - goto out_fini; - rc = apei_resources_sub(&trigger_resources, &einj_resources); - if (rc) - goto out_fini; - /* - * Some firmware will access target address specified in - * param1 to trigger the error when injecting memory error. - * This will cause resource conflict with regular memory. So - * remove it from trigger table resources. - */ - if ((param_extension || acpi5) && (type & MEM_ERROR_MASK) && param2) { - struct apei_resources addr_resources; - - apei_resources_init(&addr_resources); - trigger_param_region = einj_get_trigger_parameter_region( - trigger_tab, param1, param2); - if (trigger_param_region) { - rc = apei_resources_add(&addr_resources, - trigger_param_region->address, - trigger_param_region->bit_width/8, true); - if (rc) - goto out_fini; - rc = apei_resources_sub(&trigger_resources, - &addr_resources); - } - apei_resources_fini(&addr_resources); - if (rc) - goto out_fini; - } - rc = apei_resources_request(&trigger_resources, "APEI EINJ Trigger"); - if (rc) - goto out_fini; - rc = apei_exec_pre_map_gars(&trigger_ctx); - if (rc) - goto out_release; - - rc = apei_exec_run(&trigger_ctx, ACPI_EINJ_TRIGGER_ERROR); - - apei_exec_post_unmap_gars(&trigger_ctx); -out_release: - apei_resources_release(&trigger_resources); -out_fini: - apei_resources_fini(&trigger_resources); -out_rel_entry: - release_mem_region(trigger_paddr + sizeof(*trigger_tab), - table_size - sizeof(*trigger_tab)); -out_rel_header: - release_mem_region(trigger_paddr, sizeof(*trigger_tab)); -out: - if (trigger_tab) - iounmap(trigger_tab); - - return rc; -} - -static int __einj_error_inject(u32 type, u32 flags, u64 param1, u64 param2, - u64 param3, u64 param4) -{ - struct apei_exec_context ctx; - u64 val, trigger_paddr, timeout = FIRMWARE_TIMEOUT; - int rc; - - einj_exec_ctx_init(&ctx); - - rc = apei_exec_run_optional(&ctx, ACPI_EINJ_BEGIN_OPERATION); - if (rc) - return rc; - apei_exec_ctx_set_input(&ctx, type); - if (acpi5) { - struct set_error_type_with_address *v5param = einj_param; - - v5param->type = type; - if (type & ACPI5_VENDOR_BIT) { - switch (vendor_flags) { - case SETWA_FLAGS_APICID: - v5param->apicid = param1; - break; - case SETWA_FLAGS_MEM: - v5param->memory_address = param1; - v5param->memory_address_range = param2; - break; - case SETWA_FLAGS_PCIE_SBDF: - v5param->pcie_sbdf = param1; - break; - } - v5param->flags = vendor_flags; - } else if (flags) { - v5param->flags = flags; - v5param->memory_address = param1; - v5param->memory_address_range = param2; - v5param->apicid = param3; - v5param->pcie_sbdf = param4; - } else { - switch (type) { - case ACPI_EINJ_PROCESSOR_CORRECTABLE: - case ACPI_EINJ_PROCESSOR_UNCORRECTABLE: - case ACPI_EINJ_PROCESSOR_FATAL: - v5param->apicid = param1; - v5param->flags = SETWA_FLAGS_APICID; - break; - case ACPI_EINJ_MEMORY_CORRECTABLE: - case ACPI_EINJ_MEMORY_UNCORRECTABLE: - case ACPI_EINJ_MEMORY_FATAL: - v5param->memory_address = param1; - v5param->memory_address_range = param2; - v5param->flags = SETWA_FLAGS_MEM; - break; - case ACPI_EINJ_PCIX_CORRECTABLE: - case ACPI_EINJ_PCIX_UNCORRECTABLE: - case ACPI_EINJ_PCIX_FATAL: - v5param->pcie_sbdf = param1; - v5param->flags = SETWA_FLAGS_PCIE_SBDF; - break; - } - } - } else { - rc = apei_exec_run(&ctx, ACPI_EINJ_SET_ERROR_TYPE); - if (rc) - return rc; - if (einj_param) { - struct einj_parameter *v4param = einj_param; - - v4param->param1 = param1; - v4param->param2 = param2; - } - } - rc = apei_exec_run(&ctx, ACPI_EINJ_EXECUTE_OPERATION); - if (rc) - return rc; - for (;;) { - rc = apei_exec_run(&ctx, ACPI_EINJ_CHECK_BUSY_STATUS); - if (rc) - return rc; - val = apei_exec_ctx_get_output(&ctx); - if (!(val & EINJ_OP_BUSY)) - break; - if (einj_timedout(&timeout)) - return -EIO; - } - rc = apei_exec_run(&ctx, ACPI_EINJ_GET_COMMAND_STATUS); - if (rc) - return rc; - val = apei_exec_ctx_get_output(&ctx); - if (val == EINJ_STATUS_FAIL) - return -EBUSY; - else if (val == EINJ_STATUS_INVAL) - return -EINVAL; - - /* - * The error is injected into the platform successfully, then it needs - * to trigger the error. - */ - rc = apei_exec_run(&ctx, ACPI_EINJ_GET_TRIGGER_TABLE); - if (rc) - return rc; - trigger_paddr = apei_exec_ctx_get_output(&ctx); - if (notrigger == 0) { - rc = __einj_error_trigger(trigger_paddr, type, param1, param2); - if (rc) - return rc; - } - rc = apei_exec_run_optional(&ctx, ACPI_EINJ_END_OPERATION); - - return rc; -} - -/* Inject the specified hardware error */ -static int einj_error_inject(u32 type, u32 flags, u64 param1, u64 param2, - u64 param3, u64 param4) -{ - int rc; - u64 base_addr, size; - - /* If user manually set "flags", make sure it is legal */ - if (flags && (flags & - ~(SETWA_FLAGS_APICID|SETWA_FLAGS_MEM|SETWA_FLAGS_PCIE_SBDF))) - return -EINVAL; - - /* - * We need extra sanity checks for memory errors. - * Other types leap directly to injection. - */ - - /* ensure param1/param2 existed */ - if (!(param_extension || acpi5)) - goto inject; - - /* ensure injection is memory related */ - if (type & ACPI5_VENDOR_BIT) { - if (vendor_flags != SETWA_FLAGS_MEM) - goto inject; - } else if (!(type & MEM_ERROR_MASK) && !(flags & SETWA_FLAGS_MEM)) - goto inject; - - /* - * Disallow crazy address masks that give BIOS leeway to pick - * injection address almost anywhere. Insist on page or - * better granularity and that target address is normal RAM or - * NVDIMM. - */ - base_addr = param1 & param2; - size = ~param2 + 1; - - if (((param2 & PAGE_MASK) != PAGE_MASK) || - ((region_intersects(base_addr, size, IORESOURCE_SYSTEM_RAM, IORES_DESC_NONE) - != REGION_INTERSECTS) && - (region_intersects(base_addr, size, IORESOURCE_MEM, IORES_DESC_PERSISTENT_MEMORY) - != REGION_INTERSECTS) && - (region_intersects(base_addr, size, IORESOURCE_MEM, IORES_DESC_SOFT_RESERVED) - != REGION_INTERSECTS) && - !arch_is_platform_page(base_addr))) - return -EINVAL; - - if (is_zero_pfn(base_addr >> PAGE_SHIFT)) - return -EADDRINUSE; - -inject: - 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 struct { u32 mask; const char *str; } const einj_error_type_string[] = { - { BIT(0), "Processor Correctable" }, - { BIT(1), "Processor Uncorrectable non-fatal" }, - { BIT(2), "Processor Uncorrectable fatal" }, - { BIT(3), "Memory Correctable" }, - { BIT(4), "Memory Uncorrectable non-fatal" }, - { BIT(5), "Memory Uncorrectable fatal" }, - { BIT(6), "PCI Express Correctable" }, - { BIT(7), "PCI Express Uncorrectable non-fatal" }, - { BIT(8), "PCI Express Uncorrectable fatal" }, - { BIT(9), "Platform Correctable" }, - { BIT(10), "Platform Uncorrectable non-fatal" }, - { BIT(11), "Platform Uncorrectable fatal"}, - { BIT(12), "CXL.cache Protocol Correctable" }, - { BIT(13), "CXL.cache Protocol Uncorrectable non-fatal" }, - { BIT(14), "CXL.cache Protocol Uncorrectable fatal" }, - { BIT(15), "CXL.mem Protocol Correctable" }, - { BIT(16), "CXL.mem Protocol Uncorrectable non-fatal" }, - { BIT(17), "CXL.mem Protocol Uncorrectable fatal" }, - { BIT(31), "Vendor Defined Error Types" }, -}; - -static int available_error_type_show(struct seq_file *m, void *v) -{ - int rc; - u32 error_type = 0; - - rc = einj_get_available_error_type(&error_type); - if (rc) - return rc; - for (int pos = 0; pos < ARRAY_SIZE(einj_error_type_string); pos++) - if (error_type & einj_error_type_string[pos].mask) - seq_printf(m, "0x%08x\t%s\n", einj_error_type_string[pos].mask, - einj_error_type_string[pos].str); - - 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; - - /* Only low 32 bits for error type are valid */ - if (val & GENMASK_ULL(63, 32)) - return -EINVAL; - - /* - * 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_info("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); - } - - if (vendor_errors.size) - debugfs_create_blob("oem_error", 0600, einj_debug_dir, - &vendor_errors); - - 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); - if (vendor_errors.size) - acpi_os_unmap_memory(vendor_errors.data, vendor_errors.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"); |