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 vger.kernel.org (vger.kernel.org [23.128.96.18]) by smtp.lore.kernel.org (Postfix) with ESMTP id 69256C43217 for ; Mon, 24 Jan 2022 23:06:26 +0000 (UTC) Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S1842827AbiAXXCk (ORCPT ); Mon, 24 Jan 2022 18:02:40 -0500 Received: from lindbergh.monkeyblade.net ([23.128.96.19]:59996 "EHLO lindbergh.monkeyblade.net" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S1574739AbiAXV7D (ORCPT ); Mon, 24 Jan 2022 16:59:03 -0500 Received: from dfw.source.kernel.org (dfw.source.kernel.org [IPv6:2604:1380:4641:c500::1]) by lindbergh.monkeyblade.net (Postfix) with ESMTPS id 868D2C038AF7; Mon, 24 Jan 2022 12:39:06 -0800 (PST) Received: from smtp.kernel.org (relay.kernel.org [52.25.139.140]) (using TLSv1.2 with cipher ECDHE-RSA-AES256-GCM-SHA384 (256/256 bits)) (No client certificate requested) by dfw.source.kernel.org (Postfix) with ESMTPS id 256E561008; Mon, 24 Jan 2022 20:39:06 +0000 (UTC) Received: by smtp.kernel.org (Postfix) with ESMTPSA id 0451EC340E8; Mon, 24 Jan 2022 20:39:04 +0000 (UTC) DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/simple; d=linuxfoundation.org; s=korg; t=1643056745; bh=5qnT/ZKpsAPdNJ9R7DEiWjtGbRKYGDcgnO84ikNbvSU=; h=From:To:Cc:Subject:Date:In-Reply-To:References:From; b=CJhEfGpwpizLQfpnAODv/+RPXldHIxBCp8O0WdqADSvMc3wlRixBKKPmsrlqcxlU5 trfS9rFTczcCBUX47QF+ZUfU+JjMOdcLuzZd9Uxc5uUs3lIgkTH4isfZdvi0YhNUkc i2vDC/VijZpyAaAAu2IkP1sma+/FNSDsce5NKTmU= From: Greg Kroah-Hartman To: linux-kernel@vger.kernel.org Cc: Greg Kroah-Hartman , stable@vger.kernel.org, Joerg Albert , Lucas Stach , Christian Gmeiner , Sasha Levin Subject: [PATCH 5.15 587/846] drm/etnaviv: consider completed fence seqno in hang check Date: Mon, 24 Jan 2022 19:41:44 +0100 Message-Id: <20220124184121.288249360@linuxfoundation.org> X-Mailer: git-send-email 2.34.1 In-Reply-To: <20220124184100.867127425@linuxfoundation.org> References: <20220124184100.867127425@linuxfoundation.org> User-Agent: quilt/0.66 MIME-Version: 1.0 Content-Type: text/plain; charset=UTF-8 Content-Transfer-Encoding: 8bit Precedence: bulk List-ID: X-Mailing-List: linux-kernel@vger.kernel.org From: Lucas Stach [ Upstream commit cdd156955f946beaa5f3a00d8ccf90e5a197becc ] Some GPU heavy test programs manage to trigger the hangcheck quite often. If there are no other GPU users in the system and the test program exhibits a very regular structure in the commandstreams that are being submitted, we can end up with two distinct submits managing to trigger the hangcheck with the FE in a very similar address range. This leads the hangcheck to believe that the GPU is stuck, while in reality the GPU is already busy working on a different job. To avoid those spurious GPU resets, also remember and consider the last completed fence seqno in the hang check. Reported-by: Joerg Albert Signed-off-by: Lucas Stach Reviewed-by: Christian Gmeiner Signed-off-by: Sasha Levin --- drivers/gpu/drm/etnaviv/etnaviv_gpu.h | 1 + drivers/gpu/drm/etnaviv/etnaviv_sched.c | 4 +++- 2 files changed, 4 insertions(+), 1 deletion(-) diff --git a/drivers/gpu/drm/etnaviv/etnaviv_gpu.h b/drivers/gpu/drm/etnaviv/etnaviv_gpu.h index 1c75c8ed5bcea..85eddd492774d 100644 --- a/drivers/gpu/drm/etnaviv/etnaviv_gpu.h +++ b/drivers/gpu/drm/etnaviv/etnaviv_gpu.h @@ -130,6 +130,7 @@ struct etnaviv_gpu { /* hang detection */ u32 hangcheck_dma_addr; + u32 hangcheck_fence; void __iomem *mmio; int irq; diff --git a/drivers/gpu/drm/etnaviv/etnaviv_sched.c b/drivers/gpu/drm/etnaviv/etnaviv_sched.c index feb6da1b6cebc..bbf391f48f949 100644 --- a/drivers/gpu/drm/etnaviv/etnaviv_sched.c +++ b/drivers/gpu/drm/etnaviv/etnaviv_sched.c @@ -107,8 +107,10 @@ static enum drm_gpu_sched_stat etnaviv_sched_timedout_job(struct drm_sched_job */ dma_addr = gpu_read(gpu, VIVS_FE_DMA_ADDRESS); change = dma_addr - gpu->hangcheck_dma_addr; - if (change < 0 || change > 16) { + if (gpu->completed_fence != gpu->hangcheck_fence || + change < 0 || change > 16) { gpu->hangcheck_dma_addr = dma_addr; + gpu->hangcheck_fence = gpu->completed_fence; goto out_no_timeout; } -- 2.34.1