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 B8FE6CCA470 for ; Wed, 8 Oct 2025 21:46:01 +0000 (UTC) Received: from gabe.freedesktop.org (localhost [127.0.0.1]) by gabe.freedesktop.org (Postfix) with ESMTP id 7F45610E883; Wed, 8 Oct 2025 21:46:01 +0000 (UTC) Authentication-Results: gabe.freedesktop.org; dkim=pass (2048-bit key; unprotected) header.d=intel.com header.i=@intel.com header.b="SHWRKPw2"; dkim-atps=neutral Received: from mgamail.intel.com (mgamail.intel.com [192.198.163.16]) by gabe.freedesktop.org (Postfix) with ESMTPS id 2145E10E89D for ; Wed, 8 Oct 2025 21:45:42 +0000 (UTC) DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/simple; d=intel.com; i=@intel.com; q=dns/txt; s=Intel; t=1759959942; x=1791495942; h=from:to:subject:date:message-id:in-reply-to:references: mime-version:content-transfer-encoding; bh=ebmLwbRodXTW/Rd4QembnWY9pOERrhbhsxyTEgyoNoQ=; b=SHWRKPw2PK55V8na7tolXqkf5jRWp7wh2LypJWrkfYM/d2Kc+Dq21WC/ RZbEMk3Gt2V2KgOxJ9O+3crcwC/XU/6ENd5czzlgtkEbHHhNk4Scc2YGO TUWzhc2kmVRyXTd4Tf9Czrlex9pcBxB+Y1lzE7zalkJUt1e6CFAQRFtbU 0bf682htcGeYeD261wVCZduiYmSW/3A3TMzVgxJvzJmwRY61vpigSFDWu bxa0owuRw4HT4oRl+xebHtWesjB9pY8tv7cYmjQ9omLcS1jVnm+FIGwOu SOLTxjvjuQ7YxQqjpAd2Vx0So6LMtoNVF+/WnoChgm79sLxCZjxgKrM8C Q==; X-CSE-ConnectionGUID: ATJgTqGDSvCRqxKQdB8eQA== X-CSE-MsgGUID: 9Muqez/8SXW4FFhsBs6xEg== X-IronPort-AV: E=McAfee;i="6800,10657,11576"; a="49726861" X-IronPort-AV: E=Sophos;i="6.19,214,1754982000"; d="scan'208";a="49726861" Received: from orviesa001.jf.intel.com ([10.64.159.141]) by fmvoesa110.fm.intel.com with ESMTP/TLS/ECDHE-RSA-AES256-GCM-SHA384; 08 Oct 2025 14:45:41 -0700 X-CSE-ConnectionGUID: +PE8ZzLARW+XifFtlp2RLw== X-CSE-MsgGUID: Ogjwvz2jRF28p2sCtQWWng== X-ExtLoop1: 1 X-IronPort-AV: E=Sophos;i="6.19,214,1754982000"; d="scan'208";a="217635196" Received: from lstrano-desk.jf.intel.com ([10.54.39.91]) by smtpauth.intel.com with ESMTP/TLS/ECDHE-RSA-AES256-GCM-SHA384; 08 Oct 2025 14:45:37 -0700 From: Matthew Brost To: intel-xe@lists.freedesktop.org Subject: [PATCH v10 16/34] drm/xe/vf: Don't allow GT reset to be queued during VF post migration recovery Date: Wed, 8 Oct 2025 14:45:14 -0700 Message-Id: <20251008214532.3442967-17-matthew.brost@intel.com> X-Mailer: git-send-email 2.34.1 In-Reply-To: <20251008214532.3442967-1-matthew.brost@intel.com> References: <20251008214532.3442967-1-matthew.brost@intel.com> MIME-Version: 1.0 Content-Transfer-Encoding: 8bit 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" With well-behaved software, a GT reset should never occur, nor should it happen during VF post-migration recovery. If it does, trigger a warning but suppress the GT reset, as VF post-migration recovery is expected to bring the VF back to a working state. v3: - Better commit message (Tomasz) v5: - Use xe_gt_WARN_ON (Michal) Signed-off-by: Matthew Brost Reviewed-by: Tomasz Lis --- drivers/gpu/drm/xe/xe_gt.c | 9 ------- drivers/gpu/drm/xe/xe_gt_sriov_vf.c | 7 ----- drivers/gpu/drm/xe/xe_guc_submit.c | 42 ++++------------------------- drivers/gpu/drm/xe/xe_guc_submit.h | 3 --- 4 files changed, 5 insertions(+), 56 deletions(-) diff --git a/drivers/gpu/drm/xe/xe_gt.c b/drivers/gpu/drm/xe/xe_gt.c index d713b649447b..6951fedd4350 100644 --- a/drivers/gpu/drm/xe/xe_gt.c +++ b/drivers/gpu/drm/xe/xe_gt.c @@ -803,11 +803,6 @@ static int do_gt_restart(struct xe_gt *gt) return 0; } -static int gt_wait_reset_unblock(struct xe_gt *gt) -{ - return xe_guc_wait_reset_unblock(>->uc.guc); -} - static int gt_reset(struct xe_gt *gt) { unsigned int fw_ref; @@ -822,10 +817,6 @@ static int gt_reset(struct xe_gt *gt) xe_gt_info(gt, "reset started\n"); - err = gt_wait_reset_unblock(gt); - if (!err) - xe_gt_warn(gt, "reset block failed to get lifted"); - xe_pm_runtime_get(gt_to_xe(gt)); if (xe_fault_inject_gt_reset()) { diff --git a/drivers/gpu/drm/xe/xe_gt_sriov_vf.c b/drivers/gpu/drm/xe/xe_gt_sriov_vf.c index 1aae4e40a366..96c93a64d754 100644 --- a/drivers/gpu/drm/xe/xe_gt_sriov_vf.c +++ b/drivers/gpu/drm/xe/xe_gt_sriov_vf.c @@ -1097,17 +1097,11 @@ void xe_gt_sriov_vf_print_version(struct xe_gt *gt, struct drm_printer *p) static void vf_post_migration_shutdown(struct xe_gt *gt) { - int ret = 0; - spin_lock_irq(>->sriov.vf.migration.lock); gt->sriov.vf.migration.recovery_queued = false; spin_unlock_irq(>->sriov.vf.migration.lock); xe_guc_submit_pause(>->uc.guc); - ret |= xe_guc_submit_reset_block(>->uc.guc); - - if (ret) - xe_gt_sriov_info(gt, "migration recovery encountered ongoing reset\n"); } static size_t post_migration_scratch_size(struct xe_device *xe) @@ -1142,7 +1136,6 @@ static void vf_post_migration_kickstart(struct xe_gt *gt) */ xe_irq_resume(gt_to_xe(gt)); - xe_guc_submit_reset_unblock(>->uc.guc); xe_guc_submit_unpause(>->uc.guc); } diff --git a/drivers/gpu/drm/xe/xe_guc_submit.c b/drivers/gpu/drm/xe/xe_guc_submit.c index d123bdb63369..59371b7cc8a4 100644 --- a/drivers/gpu/drm/xe/xe_guc_submit.c +++ b/drivers/gpu/drm/xe/xe_guc_submit.c @@ -27,6 +27,7 @@ #include "xe_gt.h" #include "xe_gt_clock.h" #include "xe_gt_printk.h" +#include "xe_gt_sriov_vf.h" #include "xe_guc.h" #include "xe_guc_capture.h" #include "xe_guc_ct.h" @@ -1900,47 +1901,14 @@ static void guc_exec_queue_stop(struct xe_guc *guc, struct xe_exec_queue *q) } } -/** - * xe_guc_submit_reset_block - Disallow reset calls on given GuC. - * @guc: the &xe_guc struct instance - */ -int xe_guc_submit_reset_block(struct xe_guc *guc) -{ - return atomic_fetch_or(1, &guc->submission_state.reset_blocked); -} - -/** - * xe_guc_submit_reset_unblock - Allow back reset calls on given GuC. - * @guc: the &xe_guc struct instance - */ -void xe_guc_submit_reset_unblock(struct xe_guc *guc) -{ - atomic_set_release(&guc->submission_state.reset_blocked, 0); - wake_up_all(&guc->ct.wq); -} - -static int guc_submit_reset_is_blocked(struct xe_guc *guc) -{ - return atomic_read_acquire(&guc->submission_state.reset_blocked); -} - -/* Maximum time of blocking reset */ -#define RESET_BLOCK_PERIOD_MAX (HZ * 5) - -/** - * xe_guc_wait_reset_unblock - Wait until reset blocking flag is lifted, or timeout. - * @guc: the &xe_guc struct instance - */ -int xe_guc_wait_reset_unblock(struct xe_guc *guc) -{ - return wait_event_timeout(guc->ct.wq, - !guc_submit_reset_is_blocked(guc), RESET_BLOCK_PERIOD_MAX); -} - int xe_guc_submit_reset_prepare(struct xe_guc *guc) { int ret; + if (xe_gt_WARN_ON(guc_to_gt(guc), + xe_gt_sriov_vf_recovery_pending(guc_to_gt(guc)))) + return 0; + if (!guc->submission_state.initialized) return 0; diff --git a/drivers/gpu/drm/xe/xe_guc_submit.h b/drivers/gpu/drm/xe/xe_guc_submit.h index 5b4a0a6fd818..f535fe3895e5 100644 --- a/drivers/gpu/drm/xe/xe_guc_submit.h +++ b/drivers/gpu/drm/xe/xe_guc_submit.h @@ -22,9 +22,6 @@ void xe_guc_submit_stop(struct xe_guc *guc); int xe_guc_submit_start(struct xe_guc *guc); void xe_guc_submit_pause(struct xe_guc *guc); void xe_guc_submit_unpause(struct xe_guc *guc); -int xe_guc_submit_reset_block(struct xe_guc *guc); -void xe_guc_submit_reset_unblock(struct xe_guc *guc); -int xe_guc_wait_reset_unblock(struct xe_guc *guc); void xe_guc_submit_wedge(struct xe_guc *guc); int xe_guc_read_stopped(struct xe_guc *guc); -- 2.34.1