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-rw-r--r--Documentation/acpi/apei/einj.txt10
-rw-r--r--drivers/acpi/apei/einj.c72
2 files changed, 77 insertions, 5 deletions
diff --git a/Documentation/acpi/apei/einj.txt b/Documentation/acpi/apei/einj.txt
index 838b7f0d5e11..dfab71848dc8 100644
--- a/Documentation/acpi/apei/einj.txt
+++ b/Documentation/acpi/apei/einj.txt
@@ -45,5 +45,15 @@ directory apei/einj. The following files are provided.
injection. Before this, please specify all necessary error
parameters.
+- param1
+ This file is used to set the first error parameter value. Effect of
+ parameter depends on error_type specified. For memory error, this is
+ physical memory address.
+
+- param2
+ This file is used to set the second error parameter value. Effect of
+ parameter depends on error_type specified. For memory error, this is
+ physical memory address mask.
+
For more information about EINJ, please refer to ACPI specification
version 4.0, section 17.5.
diff --git a/drivers/acpi/apei/einj.c b/drivers/acpi/apei/einj.c
index 4ccebd8f930a..465c885938ee 100644
--- a/drivers/acpi/apei/einj.c
+++ b/drivers/acpi/apei/einj.c
@@ -7,7 +7,7 @@
* For more information about EINJ, please refer to ACPI Specification
* version 4.0, section 17.5.
*
- * Copyright 2009 Intel Corp.
+ * Copyright 2009-2010 Intel Corp.
* Author: Huang Ying <ying.huang@intel.com>
*
* This program is free software; you can redistribute it and/or
@@ -42,6 +42,20 @@
/* Firmware should respond within 1 miliseconds */
#define FIRMWARE_TIMEOUT (1 * NSEC_PER_MSEC)
+/*
+ * 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+ * EINJ table through an unpublished extension.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.
+ */
+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
@@ -85,6 +99,8 @@ static struct apei_exec_ins_type einj_ins_type[] = {
*/
static DEFINE_MUTEX(einj_mutex);
+static struct einj_parameter *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),
@@ -130,6 +146,26 @@ static int einj_timedout(u64 *t)
return 0;
}
+static u64 einj_get_parameter_address(void)
+{
+ int i;
+ u64 paddr = 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)
+ memcpy(&paddr, &entry->register_region.address,
+ sizeof(paddr));
+ entry++;
+ }
+
+ return paddr;
+}
+
/* do sanity check to trigger table */
static int einj_check_trigger_header(struct acpi_einj_trigger *trigger_tab)
{
@@ -233,7 +269,7 @@ out:
return rc;
}
-static int __einj_error_inject(u32 type)
+static int __einj_error_inject(u32 type, u64 param1, u64 param2)
{
struct apei_exec_context ctx;
u64 val, trigger_paddr, timeout = FIRMWARE_TIMEOUT;
@@ -248,6 +284,10 @@ static int __einj_error_inject(u32 type)
rc = apei_exec_run(&ctx, ACPI_EINJ_SET_ERROR_TYPE);
if (rc)
return rc;
+ if (einj_param) {
+ writeq(param1, &einj_param->param1);
+ writeq(param2, &einj_param->param2);
+ }
rc = apei_exec_run(&ctx, ACPI_EINJ_EXECUTE_OPERATION);
if (rc)
return rc;
@@ -281,18 +321,20 @@ static int __einj_error_inject(u32 type)
}
/* Inject the specified hardware error */
-static int einj_error_inject(u32 type)
+static int einj_error_inject(u32 type, u64 param1, u64 param2)
{
int rc;
mutex_lock(&einj_mutex);
- rc = __einj_error_inject(type);
+ rc = __einj_error_inject(type, param1, param2);
mutex_unlock(&einj_mutex);
return rc;
}
static u32 error_type;
+static u64 error_param1;
+static u64 error_param2;
static struct dentry *einj_debug_dir;
static int available_error_type_show(struct seq_file *m, void *v)
@@ -376,7 +418,7 @@ static int error_inject_set(void *data, u64 val)
if (!error_type)
return -EINVAL;
- return einj_error_inject(error_type);
+ return einj_error_inject(error_type, error_param1, error_param2);
}
DEFINE_SIMPLE_ATTRIBUTE(error_inject_fops, NULL,
@@ -399,6 +441,7 @@ static int einj_check_table(struct acpi_table_einj *einj_tab)
static int __init einj_init(void)
{
int rc;
+ u64 param_paddr;
acpi_status status;
struct dentry *fentry;
struct apei_exec_context ctx;
@@ -436,6 +479,14 @@ static int __init einj_init(void)
einj_debug_dir, NULL, &error_type_fops);
if (!fentry)
goto err_cleanup;
+ fentry = debugfs_create_x64("param1", S_IRUSR | S_IWUSR,
+ einj_debug_dir, &error_param1);
+ if (!fentry)
+ goto err_cleanup;
+ fentry = debugfs_create_x64("param2", S_IRUSR | S_IWUSR,
+ einj_debug_dir, &error_param2);
+ if (!fentry)
+ goto err_cleanup;
fentry = debugfs_create_file("error_inject", S_IWUSR,
einj_debug_dir, NULL, &error_inject_fops);
if (!fentry)
@@ -452,11 +503,20 @@ static int __init einj_init(void)
rc = apei_exec_pre_map_gars(&ctx);
if (rc)
goto err_release;
+ param_paddr = einj_get_parameter_address();
+ if (param_paddr) {
+ einj_param = ioremap(param_paddr, sizeof(*einj_param));
+ rc = -ENOMEM;
+ if (!einj_param)
+ goto err_unmap;
+ }
pr_info(EINJ_PFX "Error INJection is initialized.\n");
return 0;
+err_unmap:
+ apei_exec_post_unmap_gars(&ctx);
err_release:
apei_resources_release(&einj_resources);
err_fini:
@@ -471,6 +531,8 @@ static void __exit einj_exit(void)
{
struct apei_exec_context ctx;
+ if (einj_param)
+ iounmap(einj_param);
einj_exec_ctx_init(&ctx);
apei_exec_post_unmap_gars(&ctx);
apei_resources_release(&einj_resources);