[PATCH v3 7/9] ACPI: APEI: EINJ: Add debugfs files for EINJv2 support

Zaid Alali
2025-02-10T18:37:35Z

Create a debugfs blob file to be used for reading the user
input for the component array. EINJv2 enables users to inject
errors to multiple components/devices at the same time using
component array.

Signed-off-by: Zaid Alali <zaidal@os.amperecomputing.com>
---
drivers/acpi/apei/einj-core.c | 18 ++++++++++++++++++
1 file changed, 18 insertions(+)

diff --git a/drivers/acpi/apei/einj-core.c b/drivers/acpi/apei/einj-core.c
index c604aa875644..40ebdbc4961f 100644
--- a/drivers/acpi/apei/einj-core.c
+++ b/drivers/acpi/apei/einj-core.c
@@ -33,6 +33,7 @@
#define SLEEP_UNIT_MAX 5000 /* 5ms */
/* Firmware should respond within 1 seconds */
#define FIRMWARE_TIMEOUT (1 * USEC_PER_SEC)
+#define COMP_ARR_SIZE 1024
#define ACPI65_EINJV2_SUPP BIT(30)
#define ACPI5_VENDOR_BIT BIT(31)
#define MEM_ERROR_MASK (ACPI_EINJ_MEMORY_CORRECTABLE | \
@@ -107,6 +108,9 @@ static struct debugfs_blob_wrapper vendor_blob;
static struct debugfs_blob_wrapper vendor_errors;
static char vendor_dev[64];

+static struct debugfs_blob_wrapper einjv2_component_arr;
+static u64 component_count;
+static void *user_input;
static u32 available_error_type;
static u32 available_error_type_v2;

@@ -892,6 +896,19 @@ static int __init einj_probe(struct platform_device *pdev)
&error_param4);
debugfs_create_x32("notrigger", S_IRUSR | S_IWUSR,
einj_debug_dir, &notrigger);
+ if (available_error_type & ACPI65_EINJV2_SUPP) {
+ debugfs_create_x64("einjv2_component_count", S_IRUSR | S_IWUSR,
+ einj_debug_dir, &component_count);
+ user_input = kzalloc(COMP_ARR_SIZE, GFP_KERNEL);
+ if (!user_input) {
+ rc = -ENOMEM;
+ goto err_release;
+ }
+ einjv2_component_arr.data = user_input;
+ einjv2_component_arr.size = COMP_ARR_SIZE;
+ debugfs_create_blob("einjv2_component_array", S_IRUSR | S_IWUSR,
+ einj_debug_dir, &einjv2_component_arr);
+ }
}

if (vendor_dev[0]) {
@@ -941,6 +958,7 @@ static void __exit einj_remove(struct platform_device *pdev)
apei_resources_fini(&einj_resources);
debugfs_remove_recursive(einj_debug_dir);
acpi_put_table((struct acpi_table_header *)einj_tab);
+ kfree(user_input);
}

static struct platform_device *einj_dev;
--
2.34.1