From mboxrd@z Thu Jan 1 00:00:00 1970 Return-Path: X-Spam-Checker-Version: SpamAssassin 3.4.0 (2014-02-07) on aws-us-west-2-korg-lkml-1.web.codeaurora.org Received: from gabe.freedesktop.org (gabe.freedesktop.org [131.252.210.177]) (using TLSv1.2 with cipher ECDHE-RSA-AES256-GCM-SHA384 (256/256 bits)) (No client certificate requested) by smtp.lore.kernel.org (Postfix) with ESMTPS id 0796AE9DE60 for ; Thu, 9 Apr 2026 07:59:25 +0000 (UTC) Received: from gabe.freedesktop.org (localhost [127.0.0.1]) by gabe.freedesktop.org (Postfix) with ESMTP id B436F10E75B; Thu, 9 Apr 2026 07:59:24 +0000 (UTC) Authentication-Results: gabe.freedesktop.org; dkim=pass (2048-bit key; unprotected) header.d=intel.com header.i=@intel.com header.b="G/ch2Y7F"; dkim-atps=neutral Received: from mgamail.intel.com (mgamail.intel.com [198.175.65.21]) by gabe.freedesktop.org (Postfix) with ESMTPS id BC9BE10E75B for ; Thu, 9 Apr 2026 07:59:22 +0000 (UTC) DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/simple; d=intel.com; i=@intel.com; q=dns/txt; s=Intel; t=1775721563; x=1807257563; h=date:from:to:cc:subject:message-id:references: mime-version:content-transfer-encoding:in-reply-to; bh=c3f3GQlpfYlaxwk6wxwLIxoZW5JrZN+1KMWthyNLOvg=; b=G/ch2Y7FfRYOEuhKH8BpbetNpOypHEQXeKSWuObIpQUaYtU5ZS4yqFUP Z362wwQvPWsG2NwzVltpdRkTHkqA+eLhdKZmPcOOvBvLWp9KaYch752xg 42WKFUUmpsuhF9JUqg3ckbb6y7HUZxpecZiLTIwXXPco1argIF7D/67LO wRQcuSU9B0/KJa3W1HhvkqksWd3VSrunBqf/bdmgLsGFLCMoTAZQ5+Fai c+grw9jbeUxH1GU+y4+nOESRfZhoKZvjQuer59wFNyOodghIHN6c0kRCP CEKgpz1gxZ4Rz8ZfDxB57c38ZWVWQnMVnXhz4LOa7DHbqHl2FNapL/NgX A==; X-CSE-ConnectionGUID: RUFj/Q3xSuCnwfGLSYT0ZA== X-CSE-MsgGUID: 0qbWYI/XReqjbv6LVOb4Rw== X-IronPort-AV: E=McAfee;i="6800,10657,11753"; a="76598809" X-IronPort-AV: E=Sophos;i="6.23,169,1770624000"; d="scan'208";a="76598809" Received: from orviesa002.jf.intel.com ([10.64.159.142]) by orvoesa113.jf.intel.com with ESMTP/TLS/ECDHE-RSA-AES256-GCM-SHA384; 09 Apr 2026 00:59:22 -0700 X-CSE-ConnectionGUID: mc3btS1xRdCMoEZ4A3JawA== X-CSE-MsgGUID: Jo3lvXjgRxC0RFsYaGoi+Q== X-ExtLoop1: 1 X-IronPort-AV: E=Sophos;i="6.23,169,1770624000"; d="scan'208";a="259143866" Received: from black.igk.intel.com ([10.91.253.5]) by orviesa002.jf.intel.com with ESMTP/TLS/ECDHE-RSA-AES256-GCM-SHA384; 09 Apr 2026 00:59:19 -0700 Date: Thu, 9 Apr 2026 09:59:15 +0200 From: Raag Jadav To: "Mallesh, Koujalagi" Cc: matthew.brost@intel.com, rodrigo.vivi@intel.com, riana.tauro@intel.com, michal.wajdeczko@intel.com, matthew.d.roper@intel.com, umesh.nerlige.ramappa@intel.com, soham.purkait@intel.com, anoop.c.vijay@intel.com, aravind.iddamsetty@linux.intel.com, intel-xe@lists.freedesktop.org Subject: Re: [PATCH v5 3/3] drm/xe/ras: Introduce correctable error handling Message-ID: References: <20260407110629.198158-1-raag.jadav@intel.com> <20260407110629.198158-4-raag.jadav@intel.com> <9f054c64-07a1-4f29-b4e8-dfacd52a619f@intel.com> MIME-Version: 1.0 Content-Type: text/plain; charset=iso-8859-1 Content-Disposition: inline Content-Transfer-Encoding: 8bit In-Reply-To: <9f054c64-07a1-4f29-b4e8-dfacd52a619f@intel.com> X-BeenThere: intel-xe@lists.freedesktop.org X-Mailman-Version: 2.1.29 Precedence: list List-Id: Intel Xe graphics driver List-Unsubscribe: , List-Archive: List-Post: List-Help: List-Subscribe: , Errors-To: intel-xe-bounces@lists.freedesktop.org Sender: "Intel-xe" On Wed, Apr 08, 2026 at 05:55:17PM +0530, Mallesh, Koujalagi wrote: > On 07-04-2026 04:36 pm, Raag Jadav wrote: > > Add initial support for correctable error handling which is serviced > > using system controller event. Currently we only log the errors in > > dmesg but this serves as a foundation for RAS infrastructure and will > > be further extended to facilitate other RAS features. > > > > Signed-off-by: Raag Jadav > > --- > > v4: Fix Severity/Component logging (Mallesh) > > s/xe_ras_error/xe_ras_error_class (Riana) > > v5: Handle unexpected counter threshold crossed (Mallesh) > > --- > > drivers/gpu/drm/xe/Makefile | 1 + > > drivers/gpu/drm/xe/xe_ras.c | 96 +++++++++++++++++++++++++++ > > drivers/gpu/drm/xe/xe_ras.h | 14 ++++ > > drivers/gpu/drm/xe/xe_ras_types.h | 73 ++++++++++++++++++++ > > drivers/gpu/drm/xe/xe_sysctrl_event.c | 3 +- > > 5 files changed, 186 insertions(+), 1 deletion(-) > > create mode 100644 drivers/gpu/drm/xe/xe_ras.c > > create mode 100644 drivers/gpu/drm/xe/xe_ras.h > > create mode 100644 drivers/gpu/drm/xe/xe_ras_types.h > > > > diff --git a/drivers/gpu/drm/xe/Makefile b/drivers/gpu/drm/xe/Makefile > > index c0e820eeea30..f66561977a45 100644 > > --- a/drivers/gpu/drm/xe/Makefile > > +++ b/drivers/gpu/drm/xe/Makefile > > @@ -113,6 +113,7 @@ xe-y += xe_bb.o \ > > xe_pxp_submit.o \ > > xe_query.o \ > > xe_range_fence.o \ > > + xe_ras.o \ > > xe_reg_sr.o \ > > xe_reg_whitelist.o \ > > xe_ring_ops.o \ > > diff --git a/drivers/gpu/drm/xe/xe_ras.c b/drivers/gpu/drm/xe/xe_ras.c > > new file mode 100644 > > index 000000000000..6f84ade02057 > > --- /dev/null > > +++ b/drivers/gpu/drm/xe/xe_ras.c > > @@ -0,0 +1,96 @@ > > +// SPDX-License-Identifier: MIT > > +/* > > + * Copyright © 2026 Intel Corporation > > + */ > > + > > +#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", > > + [XE_RAS_SEV_UNCORRECTABLE] = "Uncorrectable", > > + [XE_RAS_SEV_INFORMATIONAL] = "Informational", > > +}; > > +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(struct xe_device *xe, u32 sev) > > +{ > Unused xe parameter, remove it Sure. > > + if (sev >= XE_RAS_SEV_MAX) > > + sev = XE_RAS_SEV_NOT_SUPPORTED; > > + > > + return xe_ras_severities[sev]; > > +} > > + > > +static inline const char *comp_to_str(struct xe_device *xe, u32 comp) > > +{ > ditto > > + if (comp >= XE_RAS_COMP_MAX) > > + comp = XE_RAS_COMP_NOT_SUPPORTED; > > + > > + return xe_ras_components[comp]; > > +} > > + > > +void xe_ras_threshold_crossed(struct xe_sysctrl *sc, struct xe_sysctrl_event_response *response) > > +{ > > + struct xe_ras_threshold_crossed_data *pending = (void *)&response->data; > > + struct xe_ras_error_class *errors = pending->counters; > > + struct xe_device *xe = sc_to_xe(sc); > > + u32 ncounters = pending->ncounters; > > + u32 cid, sev, comp, inst, cause; > > + u8 tile; > > + > > + if (!ncounters || ncounters >= XE_RAS_NUM_COUNTERS) { > > if ncounters are 16, then it's logged in error, however for (cid = 0; cid < > ncounters; cid++) > > safely accesses up to ncounters - 1. So check should be > > if (!ncounters || ncounters > XE_RAS_NUM_COUNTERS) right? Good catch. > > + xe_err(xe, "sysctrl: unexpected counter threshold crossed %u\n", ncounters); > > Use "[RAS]: ", since code is RAS owned. Agree, but this'll be misleading because it gives the impression of RAS error, which it is not. Raag > > + return; > > + } > > + > > + BUILD_BUG_ON(sizeof(response->data) < sizeof(*pending)); > > + xe_warn(xe, "[RAS]: counter threshold crossed, %u new errors\n", ncounters); > > + > > + for (cid = 0; cid < ncounters; cid++) { > > + sev = errors[cid].common.severity; > > + comp = errors[cid].common.component; > > + > > + tile = errors[cid].product.unit.tile; > > + inst = errors[cid].product.unit.instance; > > + cause = errors[cid].product.cause.cause; > > + > > + xe_warn(xe, "[RAS]: Tile:%u Instance:%u Component:%s Error:%s Cause:%#x\n", > > + tile, inst, comp_to_str(xe, comp), sev_to_str(xe, sev), cause); > > + } > > +} > > diff --git a/drivers/gpu/drm/xe/xe_ras.h b/drivers/gpu/drm/xe/xe_ras.h > > new file mode 100644 > > index 000000000000..92ee93d4e877 > > --- /dev/null > > +++ b/drivers/gpu/drm/xe/xe_ras.h > > @@ -0,0 +1,14 @@ > > +/* SPDX-License-Identifier: MIT */ > > +/* > > + * Copyright © 2026 Intel Corporation > > + */ > > + > > +#ifndef _XE_RAS_H_ > > +#define _XE_RAS_H_ > > + > > +struct xe_sysctrl; > > +struct xe_sysctrl_event_response; > > + > > +void xe_ras_threshold_crossed(struct xe_sysctrl *sc, struct xe_sysctrl_event_response *response); > > + > > +#endif > > diff --git a/drivers/gpu/drm/xe/xe_ras_types.h b/drivers/gpu/drm/xe/xe_ras_types.h > > new file mode 100644 > > index 000000000000..0e3ba9e81538 > > --- /dev/null > > +++ b/drivers/gpu/drm/xe/xe_ras_types.h > > @@ -0,0 +1,73 @@ > > +/* SPDX-License-Identifier: MIT */ > > +/* > > + * Copyright © 2026 Intel Corporation > > + */ > > + > > +#ifndef _XE_RAS_TYPES_H_ > > +#define _XE_RAS_TYPES_H_ > > + > > +#include > > + > > +#define XE_RAS_NUM_COUNTERS 16 > > + > > +/** > > + * struct xe_ras_error_common - Error fields that are common across all products > > + */ > > +struct xe_ras_error_common { > > + /** @severity: Error severity */ > > + u8 severity; > > + /** @component: IP block where error originated */ > > + u8 component; > > +} __packed; > > + > > +/** > > + * struct xe_ras_error_unit - Error unit information > > + */ > > +struct xe_ras_error_unit { > > + /** @tile: Tile identifier */ > > + u8 tile; > > + /** @instance: Instance identifier specific to IP */ > > + u32 instance; > > +} __packed; > > + > > +/** > > + * struct xe_ras_error_cause - Error cause information > > + */ > > +struct xe_ras_error_cause { > > + /** @cause: Cause/checker */ > > + u32 cause; > > + /** @reserved: For future use */ > > + u8 reserved; > > +} __packed; > > + > > +/** > > + * struct xe_ras_error_product - Error fields that are specific to the product > > + */ > > +struct xe_ras_error_product { > > + /** @unit: Unit within IP block */ > > + struct xe_ras_error_unit unit; > > + /** @cause: Cause/checker */ > > + struct xe_ras_error_cause cause; > > +} __packed; > > + > > +/** > > + * struct xe_ras_error_class - Combines common and product-specific parts > > + */ > > +struct xe_ras_error_class { > > + /** @common: Common error type and component */ > > + struct xe_ras_error_common common; > > + /** @product: Product-specific unit and cause */ > > + struct xe_ras_error_product product; > > +} __packed; > > + > > +/** > > + * struct xe_ras_threshold_crossed_data - Data for threshold crossed event > > + */ > > +struct xe_ras_threshold_crossed_data { > > + /** @ncounters: Number of error counters that crossed thresholds */ > > + u32 ncounters; > > + /** @counters: Array of error counters that crossed threshold */ > > + struct xe_ras_error_class counters[XE_RAS_NUM_COUNTERS]; > > +} __packed; > > + > > +#endif > > diff --git a/drivers/gpu/drm/xe/xe_sysctrl_event.c b/drivers/gpu/drm/xe/xe_sysctrl_event.c > > index 8a2e44f4f5e0..139ecd4aafcd 100644 > > --- a/drivers/gpu/drm/xe/xe_sysctrl_event.c > > +++ b/drivers/gpu/drm/xe/xe_sysctrl_event.c > > @@ -6,6 +6,7 @@ > > #include "xe_device.h" > > #include "xe_irq.h" > > #include "xe_printk.h" > > +#include "xe_ras.h" > > #include "xe_sysctrl.h" > > #include "xe_sysctrl_event_types.h" > > #include "xe_sysctrl_mailbox.h" @@ -38,7 +39,7 @@ static void > > xe_sysctrl_get_pending_event(struct xe_sysctrl *sc, } if (response.event > > == XE_SYSCTRL_EVENT_THRESHOLD_CROSSED) { - xe_warn(xe, "[RAS]: counter > > threshold crossed\n"); > > + xe_ras_threshold_crossed(sc, &response); > > } else { > > xe_err(xe, "sysctrl: unexpected event %#x\n", response.event); > > return;