![Borislav Petkov](/assets/img/avatar_default.png)
It is absolutely unfriendly when one sees this: # modprobe einj modprobe: ERROR: could not insert 'einj': No such device without anything in dmesg to tell one why the load failed. Beef up the error handling of the init function to be more user-friendly when the load fails. Signed-off-by: Borislav Petkov <bp@suse.de> Acked-by: Tony Luck <tony.luck@intel.com> Signed-off-by: Rafael J. Wysocki <rafael.j.wysocki@intel.com>
852 lines
22 KiB
C
852 lines
22 KiB
C
/*
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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 <ying.huang@intel.com>
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*
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* This program is free software; you can redistribute it and/or
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* modify it under the terms of the GNU General Public License version
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* 2 as published by the Free Software Foundation.
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*
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* This program is distributed in the hope that it will be useful,
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* but WITHOUT ANY WARRANTY; without even the implied warranty of
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* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
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* GNU General Public License for more details.
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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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#include "apei-internal.h"
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#undef pr_fmt
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#define pr_fmt(fmt) "EINJ: " fmt
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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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* 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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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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* 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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static u32 notrigger;
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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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* 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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#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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#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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static bool param_extension;
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module_param(param_extension, bool, 0);
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static struct acpi_table_einj *einj_tab;
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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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* 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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static void *einj_param;
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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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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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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_warning(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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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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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_warning(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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rc = apei_exec_run(&trigger_ctx, ACPI_EINJ_TRIGGER_ERROR);
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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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return rc;
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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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einj_exec_ctx_init(&ctx);
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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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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 (;;) {
|
|
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_SUCCESS)
|
|
return -EBUSY;
|
|
|
|
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)))
|
|
return -EINVAL;
|
|
|
|
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 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;
|
|
}
|
|
|
|
static int available_error_type_open(struct inode *inode, struct file *file)
|
|
{
|
|
return single_open(file, available_error_type_show, NULL);
|
|
}
|
|
|
|
static const struct file_operations available_error_type_fops = {
|
|
.open = available_error_type_open,
|
|
.read = seq_read,
|
|
.llseek = seq_lseek,
|
|
.release = single_release,
|
|
};
|
|
|
|
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_SIMPLE_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_SIMPLE_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 dentry *fentry;
|
|
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");
|
|
return -EINVAL;
|
|
}
|
|
|
|
rc = -ENOMEM;
|
|
einj_debug_dir = debugfs_create_dir("einj", apei_get_debugfs_dir());
|
|
if (!einj_debug_dir) {
|
|
pr_err("Error creating debugfs node.\n");
|
|
goto err_cleanup;
|
|
}
|
|
|
|
fentry = debugfs_create_file("available_error_type", S_IRUSR,
|
|
einj_debug_dir, NULL,
|
|
&available_error_type_fops);
|
|
if (!fentry)
|
|
goto err_cleanup;
|
|
|
|
fentry = debugfs_create_file("error_type", S_IRUSR | S_IWUSR,
|
|
einj_debug_dir, NULL, &error_type_fops);
|
|
if (!fentry)
|
|
goto err_cleanup;
|
|
fentry = debugfs_create_file("error_inject", S_IWUSR,
|
|
einj_debug_dir, NULL, &error_inject_fops);
|
|
if (!fentry)
|
|
goto err_cleanup;
|
|
|
|
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;
|
|
}
|
|
|
|
rc = -ENOMEM;
|
|
einj_param = einj_get_parameter_address();
|
|
if ((param_extension || acpi5) && einj_param) {
|
|
fentry = debugfs_create_x32("flags", S_IRUSR | S_IWUSR,
|
|
einj_debug_dir, &error_flags);
|
|
if (!fentry)
|
|
goto err_unmap;
|
|
fentry = debugfs_create_x64("param1", S_IRUSR | S_IWUSR,
|
|
einj_debug_dir, &error_param1);
|
|
if (!fentry)
|
|
goto err_unmap;
|
|
fentry = debugfs_create_x64("param2", S_IRUSR | S_IWUSR,
|
|
einj_debug_dir, &error_param2);
|
|
if (!fentry)
|
|
goto err_unmap;
|
|
fentry = debugfs_create_x64("param3", S_IRUSR | S_IWUSR,
|
|
einj_debug_dir, &error_param3);
|
|
if (!fentry)
|
|
goto err_unmap;
|
|
fentry = debugfs_create_x64("param4", S_IRUSR | S_IWUSR,
|
|
einj_debug_dir, &error_param4);
|
|
if (!fentry)
|
|
goto err_unmap;
|
|
|
|
fentry = debugfs_create_x32("notrigger", S_IRUSR | S_IWUSR,
|
|
einj_debug_dir, ¬rigger);
|
|
if (!fentry)
|
|
goto err_unmap;
|
|
}
|
|
|
|
if (vendor_dev[0]) {
|
|
vendor_blob.data = vendor_dev;
|
|
vendor_blob.size = strlen(vendor_dev);
|
|
fentry = debugfs_create_blob("vendor", S_IRUSR,
|
|
einj_debug_dir, &vendor_blob);
|
|
if (!fentry)
|
|
goto err_unmap;
|
|
fentry = debugfs_create_x32("vendor_flags", S_IRUSR | S_IWUSR,
|
|
einj_debug_dir, &vendor_flags);
|
|
if (!fentry)
|
|
goto err_unmap;
|
|
}
|
|
|
|
pr_info("Error INJection is initialized.\n");
|
|
|
|
return 0;
|
|
|
|
err_unmap:
|
|
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);
|
|
pr_err("Error creating param extension debugfs nodes.\n");
|
|
}
|
|
apei_exec_post_unmap_gars(&ctx);
|
|
err_release:
|
|
apei_resources_release(&einj_resources);
|
|
err_fini:
|
|
apei_resources_fini(&einj_resources);
|
|
err_cleanup:
|
|
pr_err("Error creating primary debugfs nodes.\n");
|
|
debugfs_remove_recursive(einj_debug_dir);
|
|
|
|
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);
|
|
}
|
|
|
|
module_init(einj_init);
|
|
module_exit(einj_exit);
|
|
|
|
MODULE_AUTHOR("Huang Ying");
|
|
MODULE_DESCRIPTION("APEI Error INJection support");
|
|
MODULE_LICENSE("GPL");
|