platform/x86/intel/ifs: Sysfs interface for Array BIST

The interface to trigger Array BIST test and obtain its result is similar to the existing scan test. The only notable difference is that, Array BIST doesn't require any test content to be loaded. So binary load related options are not needed for this test. Add sysfs interface for array BIST test, the testing support will be added by subsequent patch. Signed-off-by: Jithu Joseph <jithu.joseph@intel.com> Reviewed-by: Tony Luck <tony.luck@intel.com> Link: https://lore.kernel.org/r/20230322003359.213046-7-jithu.joseph@intel.com Reviewed-by: Hans de Goede <hdegoede@redhat.com> Signed-off-by: Hans de Goede <hdegoede@redhat.com>
esmil · Mar 27, 2023 · 5210fb4 · 5210fb4
1 parent d31bbdf
commit 5210fb4
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Showing 4 changed files with 24 additions and 6 deletions.
diff --git a/drivers/platform/x86/intel/ifs/core.c b/drivers/platform/x86/intel/ifs/core.c
@@ -22,6 +22,7 @@ static const struct x86_cpu_id ifs_cpu_ids[] __initconst = {
 MODULE_DEVICE_TABLE(x86cpu, ifs_cpu_ids);
 
 ATTRIBUTE_GROUPS(plat_ifs);
+ATTRIBUTE_GROUPS(plat_ifs_array);
 
 bool *ifs_pkg_auth;
 
@@ -49,6 +50,7 @@ static struct ifs_device ifs_devices[] = {
 		.misc = {
 			.name = "intel_ifs_1",
 			.minor = MISC_DYNAMIC_MINOR,
+			.groups = plat_ifs_array_groups,
 		},
 	},
 };

diff --git a/drivers/platform/x86/intel/ifs/ifs.h b/drivers/platform/x86/intel/ifs/ifs.h
@@ -256,5 +256,6 @@ extern bool *ifs_pkg_auth;
 int ifs_load_firmware(struct device *dev);
 int do_core_test(int cpu, struct device *dev);
 extern struct attribute *plat_ifs_attrs[];
+extern struct attribute *plat_ifs_array_attrs[];
 
 #endif
diff --git a/drivers/platform/x86/intel/ifs/runtest.c b/drivers/platform/x86/intel/ifs/runtest.c
@@ -236,6 +236,8 @@ static void ifs_test_core(int cpu, struct device *dev)
  */
 int do_core_test(int cpu, struct device *dev)
 {
+	const struct ifs_test_caps *test = ifs_get_test_caps(dev);
+	struct ifs_data *ifsd = ifs_get_data(dev);
 	int ret = 0;
 
 	/* Prevent CPUs from being taken offline during the scan test */
@@ -247,7 +249,16 @@ int do_core_test(int cpu, struct device *dev)
 		goto out;
 	}
 
-	ifs_test_core(cpu, dev);
+	switch (test->test_num) {
+	case IFS_TYPE_SAF:
+		if (!ifsd->loaded)
+			return -EPERM;
+		ifs_test_core(cpu, dev);
+		break;
+	case IFS_TYPE_ARRAY_BIST:
+	default:
+		return -EINVAL;
+	}
 out:
 	cpus_read_unlock();
 	return ret;

diff --git a/drivers/platform/x86/intel/ifs/sysfs.c b/drivers/platform/x86/intel/ifs/sysfs.c
@@ -64,7 +64,6 @@ static ssize_t run_test_store(struct device *dev,
 			      struct device_attribute *attr,
 			      const char *buf, size_t count)
 {
-	struct ifs_data *ifsd = ifs_get_data(dev);
 	unsigned int cpu;
 	int rc;
 
@@ -75,10 +74,7 @@ static ssize_t run_test_store(struct device *dev,
 	if (down_interruptible(&ifs_sem))
 		return -EINTR;
 
-	if (!ifsd->loaded)
-		rc = -EPERM;
-	else
-		rc = do_core_test(cpu, dev);
+	rc = do_core_test(cpu, dev);
 
 	up(&ifs_sem);
 
@@ -149,3 +145,11 @@ struct attribute *plat_ifs_attrs[] = {
 	&dev_attr_image_version.attr,
 	NULL
 };
+
+/* global array sysfs attributes */
+struct attribute *plat_ifs_array_attrs[] = {
+	&dev_attr_details.attr,
+	&dev_attr_status.attr,
+	&dev_attr_run_test.attr,
+	NULL
+};