drivers/gpu/drm/xe/xe_ras.c

// SPDX-License-Identifier: MIT
/*
 * Copyright © 2026 Intel Corporation
 */

#include "xe_device.h"
#include "xe_printk.h"
#include "xe_ras.h"
#include "xe_ras_types.h"
#include "xe_sysctrl.h"
#include "xe_sysctrl_event_types.h"

/* Severity of detected errors  */
enum xe_ras_severity {
	XE_RAS_SEV_NOT_SUPPORTED = 0,
	XE_RAS_SEV_CORRECTABLE,
	XE_RAS_SEV_UNCORRECTABLE,
	XE_RAS_SEV_INFORMATIONAL,
	XE_RAS_SEV_MAX
};

/* Major IP blocks/components where errors can originate */
enum xe_ras_component {
	XE_RAS_COMP_NOT_SUPPORTED = 0,
	XE_RAS_COMP_DEVICE_MEMORY,
	XE_RAS_COMP_CORE_COMPUTE,
	XE_RAS_COMP_RESERVED,
	XE_RAS_COMP_PCIE,
	XE_RAS_COMP_FABRIC,
	XE_RAS_COMP_SOC_INTERNAL,
	XE_RAS_COMP_MAX
};

static const char *const xe_ras_severities[] = {
	[XE_RAS_SEV_NOT_SUPPORTED]		= "Not Supported",
	[XE_RAS_SEV_CORRECTABLE]		= "Correctable Error",
	[XE_RAS_SEV_UNCORRECTABLE]		= "Uncorrectable Error",
	[XE_RAS_SEV_INFORMATIONAL]		= "Informational Error",
};
static_assert(ARRAY_SIZE(xe_ras_severities) == XE_RAS_SEV_MAX);

static const char *const xe_ras_components[] = {
	[XE_RAS_COMP_NOT_SUPPORTED]		= "Not Supported",
	[XE_RAS_COMP_DEVICE_MEMORY]		= "Device Memory",
	[XE_RAS_COMP_CORE_COMPUTE]		= "Core Compute",
	[XE_RAS_COMP_RESERVED]			= "Reserved",
	[XE_RAS_COMP_PCIE]			= "PCIe",
	[XE_RAS_COMP_FABRIC]			= "Fabric",
	[XE_RAS_COMP_SOC_INTERNAL]		= "SoC Internal",
};
static_assert(ARRAY_SIZE(xe_ras_components) == XE_RAS_COMP_MAX);

static inline const char *sev_to_str(u8 severity)
{
	if (severity >= XE_RAS_SEV_MAX)
		severity = XE_RAS_SEV_NOT_SUPPORTED;

	return xe_ras_severities[severity];
}

static inline const char *comp_to_str(u8 component)
{
	if (component >= XE_RAS_COMP_MAX)
		component = XE_RAS_COMP_NOT_SUPPORTED;

	return xe_ras_components[component];
}

void xe_ras_counter_threshold_crossed(struct xe_device *xe,
				      struct xe_sysctrl_event_response *response)
{
	struct xe_ras_threshold_crossed *pending = (void *)&response->data;
	struct xe_ras_error_class *errors = pending->counters;
	u32 id, ncounters = pending->ncounters;

	BUILD_BUG_ON(sizeof(response->data) < sizeof(*pending));
	xe_device_assert_mem_access(xe);

	if (!ncounters || ncounters > XE_RAS_NUM_COUNTERS)
		xe_err(xe, "sysctrl: unexpected counter threshold crossed %u\n", ncounters);
	else
		xe_warn(xe, "[RAS]: counter threshold crossed, %u new errors\n", ncounters);

	for (id = 0; id < ncounters && id < XE_RAS_NUM_COUNTERS; id++) {
		u8 severity, component;

		severity = errors[id].common.severity;
		component = errors[id].common.component;

		xe_warn(xe, "[RAS]: %s %s detected\n",
			comp_to_str(component), sev_to_str(severity));
	}
}