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 D1568C7EE2A for ; Wed, 17 May 2023 15:23:44 +0000 (UTC) Received: from gabe.freedesktop.org (localhost [127.0.0.1]) by gabe.freedesktop.org (Postfix) with ESMTP id 774DD10E44A; Wed, 17 May 2023 15:23:44 +0000 (UTC) Received: from mga05.intel.com (mga05.intel.com [192.55.52.43]) by gabe.freedesktop.org (Postfix) with ESMTPS id BFB2010E446 for ; Wed, 17 May 2023 15:23:41 +0000 (UTC) DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/simple; d=intel.com; i=@intel.com; q=dns/txt; s=Intel; t=1684337021; x=1715873021; h=from:to:cc:subject:date:message-id:in-reply-to: references:mime-version:content-transfer-encoding; bh=TgOrB64FsE0XkZozoI1xrtn4+exBTB9guez71KJG+/A=; b=kKQORpIBxUv3GXUCvjf/1dcMWaWwUD2+L5cOb+lpzI0JwG6Hw6nEjCgP SSr8eUJ9P0xZcxBWqR7ODbSRxepN3Tqmf9owdvG5+UO9cvx8FDkNj6u6G Fs1T3f7Hhd3MFALacIAlgAaADplZbT1EP+PuMFyhhrsS9X+VWf1+jbgZ6 IGH/ha7dy9eLyf9foqws95A/3jNNSbl1ZhASXhDJUHKXo6ReoGAgDP08b GoLJBSfowtzWoicZ/hf6siqo1EQRsV1gg3D/kiehwr4yvfhFGiRCU5aMW tQJrmb6CZSWN6Pvu8J0JtzFtndsQXh8f+nu6qZwpTXbbACDTurv/IQ0E7 g==; X-IronPort-AV: E=McAfee;i="6600,9927,10713"; a="438132143" X-IronPort-AV: E=Sophos;i="5.99,282,1677571200"; d="scan'208";a="438132143" Received: from fmsmga001.fm.intel.com ([10.253.24.23]) by fmsmga105.fm.intel.com with ESMTP/TLS/ECDHE-RSA-AES256-GCM-SHA384; 17 May 2023 08:23:41 -0700 X-ExtLoop1: 1 X-IronPort-AV: E=McAfee;i="6600,9927,10713"; a="846129301" X-IronPort-AV: E=Sophos;i="5.99,282,1677571200"; d="scan'208";a="846129301" Received: from fskirtun-mobl-g8.ger.corp.intel.com (HELO mwauld-desk1.intel.com) ([10.252.15.194]) by fmsmga001-auth.fm.intel.com with ESMTP/TLS/ECDHE-RSA-AES256-GCM-SHA384; 17 May 2023 08:23:40 -0700 From: Matthew Auld To: intel-xe@lists.freedesktop.org Date: Wed, 17 May 2023 16:22:40 +0100 Message-Id: <20230517152244.348171-3-matthew.auld@intel.com> X-Mailer: git-send-email 2.40.1 In-Reply-To: <20230517152244.348171-1-matthew.auld@intel.com> References: <20230517152244.348171-1-matthew.auld@intel.com> MIME-Version: 1.0 Content-Type: text/plain; charset=UTF-8 Content-Transfer-Encoding: 8bit Subject: [Intel-xe] [PATCH v5 3/7] drm/xe: don't allocate under ct->lock 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: , Cc: Rodrigo Vivi Errors-To: intel-xe-bounces@lists.freedesktop.org Sender: "Intel-xe" Seems to be a sensitive lock, where ct->lock looks to be primed with fs_reclaim, so holding that and then allocating memory will cause lockdep to complain. We need to change the ordering wrt to grabbing the ct->lock and potentially grabbing the runtime_pm, since some of the runtime_pm routines can allocate memory (or at least that's what lockdep seems to suggest). Signed-off-by: Matthew Auld Cc: Thomas Hellström Cc: Rodrigo Vivi --- drivers/gpu/drm/xe/xe_gt_tlb_invalidation.c | 4 ++++ drivers/gpu/drm/xe/xe_guc_ct.c | 13 +++++++------ 2 files changed, 11 insertions(+), 6 deletions(-) diff --git a/drivers/gpu/drm/xe/xe_gt_tlb_invalidation.c b/drivers/gpu/drm/xe/xe_gt_tlb_invalidation.c index c815a42e2cdb..20f8f0aae6b4 100644 --- a/drivers/gpu/drm/xe/xe_gt_tlb_invalidation.c +++ b/drivers/gpu/drm/xe/xe_gt_tlb_invalidation.c @@ -5,6 +5,7 @@ #include "xe_gt_tlb_invalidation.h" +#include "xe_device.h" #include "xe_gt.h" #include "xe_guc.h" #include "xe_guc_ct.h" @@ -112,6 +113,8 @@ static int send_tlb_invalidation(struct xe_guc *guc, * in order which they currently are, if that changes the algorithm will * need to be updated. */ + + xe_device_mem_access_get(gt->xe); mutex_lock(&guc->ct.lock); seqno = gt->tlb_invalidation.seqno; if (fence) { @@ -140,6 +143,7 @@ static int send_tlb_invalidation(struct xe_guc *guc, if (ret < 0 && fence) invalidation_fence_signal(fence); mutex_unlock(&guc->ct.lock); + xe_device_mem_access_put(gt->xe); return ret; } diff --git a/drivers/gpu/drm/xe/xe_guc_ct.c b/drivers/gpu/drm/xe/xe_guc_ct.c index 9055ff133a7c..579d7f341f13 100644 --- a/drivers/gpu/drm/xe/xe_guc_ct.c +++ b/drivers/gpu/drm/xe/xe_guc_ct.c @@ -494,26 +494,22 @@ static int __guc_ct_send_locked(struct xe_guc_ct *ct, const u32 *action, } } - xe_device_mem_access_get(ct_to_xe(ct)); retry: ret = has_room(ct, len + GUC_CTB_HDR_LEN, g2h_len); if (unlikely(ret)) - goto put_wa; + goto out; ret = h2g_write(ct, action, len, g2h_fence ? g2h_fence->seqno : 0, !!g2h_fence); if (unlikely(ret)) { if (ret == -EAGAIN) goto retry; - goto put_wa; + goto out; } g2h_reserve_space(ct, g2h_len, num_g2h); xe_guc_notify(ct_to_guc(ct)); -put_wa: - xe_device_mem_access_put(ct_to_xe(ct)); out: - return ret; } @@ -535,6 +531,7 @@ static int guc_ct_send_locked(struct xe_guc_ct *ct, const u32 *action, u32 len, XE_BUG_ON(g2h_len && g2h_fence); lockdep_assert_held(&ct->lock); + xe_device_assert_mem_access(ct_to_xe(ct)); try_again: ret = __guc_ct_send_locked(ct, action, len, g2h_len, num_g2h, @@ -602,10 +599,14 @@ static int guc_ct_send(struct xe_guc_ct *ct, const u32 *action, u32 len, XE_BUG_ON(g2h_len && g2h_fence); + xe_device_mem_access_get(ct_to_xe(ct)); + mutex_lock(&ct->lock); ret = guc_ct_send_locked(ct, action, len, g2h_len, num_g2h, g2h_fence); mutex_unlock(&ct->lock); + xe_device_mem_access_put(ct_to_xe(ct)); + return ret; } -- 2.40.1