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 DFACFC77B73 for ; Mon, 22 May 2023 13:08:00 +0000 (UTC) Received: from gabe.freedesktop.org (localhost [127.0.0.1]) by gabe.freedesktop.org (Postfix) with ESMTP id 9EAA310E31F; Mon, 22 May 2023 13:08:00 +0000 (UTC) Received: from mga17.intel.com (mga17.intel.com [192.55.52.151]) by gabe.freedesktop.org (Postfix) with ESMTPS id 0977E10E31F for ; Mon, 22 May 2023 13:07:59 +0000 (UTC) DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/simple; d=intel.com; i=@intel.com; q=dns/txt; s=Intel; t=1684760880; x=1716296880; h=from:to:cc:subject:date:message-id:in-reply-to: references:mime-version:content-transfer-encoding; bh=GGqMu5/N6UEpCMuweb2QUGNMw4cqFDmaymcCYfzfLi8=; b=ipI5HGjLyvQluEzqnT+9UBQnfq9GIvDBrRkMIwA5RTIt2fETqFrv2pfF a2mjLnT41aSWyPEo0dCyw13uIYPdZOaBrqf83Xh5UbTwu6Tac8d7snfKE tRtsjOk2X2aX7rJwItvxU5dKSpUKVdQ3WphKMqcMZEtUM/7svv/nkTXd3 pUS5E0x38kcgwhutf6qwv8vtwwQrF6kMi5bAegkB2sxMj0qTjtIP0tKu4 LO1/OxI0ZLuGvgX5FbG4EjJOypI4BeFkgjuRBxHPmqygqb/cjLs7sg6oB uDN6MtszKTC52wef+9tH1R8Rt/CktdbQwC0oeyeD2mSQTj9VF/oBJ7yEZ g==; X-IronPort-AV: E=McAfee;i="6600,9927,10717"; a="333279829" X-IronPort-AV: E=Sophos;i="6.00,184,1681196400"; d="scan'208";a="333279829" Received: from fmsmga004.fm.intel.com ([10.253.24.48]) by fmsmga107.fm.intel.com with ESMTP/TLS/ECDHE-RSA-AES256-GCM-SHA384; 22 May 2023 06:06:14 -0700 X-ExtLoop1: 1 X-IronPort-AV: E=McAfee;i="6600,9927,10717"; a="773350715" X-IronPort-AV: E=Sophos;i="6.00,184,1681196400"; d="scan'208";a="773350715" Received: from amigon-mobl.ger.corp.intel.com (HELO mwauld-desk1.intel.com) ([10.249.128.230]) by fmsmga004-auth.fm.intel.com with ESMTP/TLS/ECDHE-RSA-AES256-GCM-SHA384; 22 May 2023 06:06:12 -0700 From: Matthew Auld To: intel-xe@lists.freedesktop.org Date: Mon, 22 May 2023 14:04:57 +0100 Message-Id: <20230522130501.60977-2-matthew.auld@intel.com> X-Mailer: git-send-email 2.40.1 In-Reply-To: <20230522130501.60977-1-matthew.auld@intel.com> References: <20230522130501.60977-1-matthew.auld@intel.com> MIME-Version: 1.0 Content-Type: text/plain; charset=UTF-8 Content-Transfer-Encoding: 8bit Subject: [Intel-xe] [PATCH v6 2/6] 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 Reviewed-by: 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 e8c2edb1359d..9dc906f2651a 100644 --- a/drivers/gpu/drm/xe/xe_guc_ct.c +++ b/drivers/gpu/drm/xe/xe_guc_ct.c @@ -498,26 +498,22 @@ 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; } @@ -539,6 +535,7 @@ 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, @@ -608,10 +605,14 @@ 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