From patchwork Thu Jun 4 08:12:16 2020 Content-Type: text/plain; charset="utf-8" MIME-Version: 1.0 Content-Transfer-Encoding: 8bit X-Patchwork-Submitter: Daniel Vetter X-Patchwork-Id: 11587337 Return-Path: Received: from mail.kernel.org (pdx-korg-mail-1.web.codeaurora.org [172.30.200.123]) by pdx-korg-patchwork-2.web.codeaurora.org (Postfix) with ESMTP id 5177E90 for ; Thu, 4 Jun 2020 08:12:50 +0000 (UTC) Received: from vger.kernel.org (vger.kernel.org [23.128.96.18]) by mail.kernel.org (Postfix) with ESMTP id 3760F207DA for ; Thu, 4 Jun 2020 08:12:50 +0000 (UTC) Authentication-Results: mail.kernel.org; dkim=pass (1024-bit key) header.d=ffwll.ch header.i=@ffwll.ch header.b="lnZAfT6Y" Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S1727785AbgFDIMs (ORCPT ); Thu, 4 Jun 2020 04:12:48 -0400 Received: from lindbergh.monkeyblade.net ([23.128.96.19]:51460 "EHLO lindbergh.monkeyblade.net" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S1727780AbgFDIMr (ORCPT ); Thu, 4 Jun 2020 04:12:47 -0400 Received: from mail-wm1-x343.google.com (mail-wm1-x343.google.com [IPv6:2a00:1450:4864:20::343]) by lindbergh.monkeyblade.net (Postfix) with ESMTPS id 2884BC03E96E for ; Thu, 4 Jun 2020 01:12:46 -0700 (PDT) Received: by mail-wm1-x343.google.com with SMTP id g10so4293339wmh.4 for ; Thu, 04 Jun 2020 01:12:46 -0700 (PDT) DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=ffwll.ch; s=google; h=from:to:cc:subject:date:message-id:in-reply-to:references :mime-version:content-transfer-encoding; bh=JO6albsu9ail3aAxe1jjEWcSoPjULvK53jZ9O0zdFWo=; b=lnZAfT6Yff+IJyU+6wsUrqsOgP2Gj+BMlZtMrYghbDpPPGSv/zoqP2grdoO4AOw05E uLOJb/YvDpIETJrOA8RWtcCTW3/8iagYeIGfCzBgEwAJEkP3SyZ5oE2wCQuq2Ve1iyQR bh1mKlhPqlAZFzfugxhI6xRlys9QcfRU1N110= X-Google-DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=1e100.net; s=20161025; h=x-gm-message-state:from:to:cc:subject:date:message-id:in-reply-to :references:mime-version:content-transfer-encoding; bh=JO6albsu9ail3aAxe1jjEWcSoPjULvK53jZ9O0zdFWo=; b=qo9QTVns257pbDw2EA+Egbroyep3qkLngaXuAjKynZszIia6IqMJ0Csofwxae5AArA 7uat67gxTFyURWMyFLHxueK/sOOuEygIypW6KEJL+/ubQufqc3Am9TDrMjfGRxDH8n7d Je5OjwkmMKbP2/DZcTctKklEFbbTf/zsbOAVIf0opvRA5qtm/4yp7UZFdbctwhh5kxow pyS+uJAdBzISl3Kqcu5ohz7RIeIv6prUfeMrZ9AusAAKAqhGYR82Wgm09gqqgGXq07V7 fnk/zBCZV83/jyNKAak2Te+t8Uq6oYnCD3XF/5DjywYxg7NXdZXHYnT7o+x6UaavJUXM Ia2Q== X-Gm-Message-State: AOAM531oDemkPpBBxf1f1xhV/rPbA4eh1G7+iKvtFJ8vNNBD/0gsloDg NueNkw0ZTCkNir31gKua2NgGBQ== X-Google-Smtp-Source: ABdhPJyn8WC4htH2TFhAJzXT32NdRtoD972Y+p3loDxohFz/ONHD+IEVEXE5SDKPFz9SSfLivB0maw== X-Received: by 2002:a7b:c385:: with SMTP id s5mr3041559wmj.121.1591258364877; Thu, 04 Jun 2020 01:12:44 -0700 (PDT) Received: from phenom.ffwll.local ([2a02:168:57f4:0:efd0:b9e5:5ae6:c2fa]) by smtp.gmail.com with ESMTPSA id f11sm6873305wrj.2.2020.06.04.01.12.43 (version=TLS1_3 cipher=TLS_AES_256_GCM_SHA384 bits=256/256); Thu, 04 Jun 2020 01:12:44 -0700 (PDT) From: Daniel Vetter To: DRI Development Cc: Intel Graphics Development , LKML , linux-rdma@vger.kernel.org, amd-gfx@lists.freedesktop.org, Daniel Vetter , linux-media@vger.kernel.org, linaro-mm-sig@lists.linaro.org, Chris Wilson , Maarten Lankhorst , =?utf-8?q?Christian_?= =?utf-8?q?K=C3=B6nig?= , Daniel Vetter Subject: [PATCH 10/18] drm/amdgpu: use dma-fence annotations in cs_submit() Date: Thu, 4 Jun 2020 10:12:16 +0200 Message-Id: <20200604081224.863494-11-daniel.vetter@ffwll.ch> X-Mailer: git-send-email 2.26.2 In-Reply-To: <20200604081224.863494-1-daniel.vetter@ffwll.ch> References: <20200604081224.863494-1-daniel.vetter@ffwll.ch> MIME-Version: 1.0 Sender: linux-rdma-owner@vger.kernel.org Precedence: bulk List-ID: X-Mailing-List: linux-rdma@vger.kernel.org This is a bit tricky, since ->notifier_lock is held while calling dma_fence_wait we must ensure that also the read side (i.e. dma_fence_begin_signalling) is on the same side. If we mix this up lockdep complaints, and that's again why we want to have these annotations. A nice side effect of this is that because of the fs_reclaim priming for dma_fence_enable lockdep now automatically checks for us that nothing in here allocates memory, without even running any userptr workloads. Cc: linux-media@vger.kernel.org Cc: linaro-mm-sig@lists.linaro.org Cc: linux-rdma@vger.kernel.org Cc: amd-gfx@lists.freedesktop.org Cc: intel-gfx@lists.freedesktop.org Cc: Chris Wilson Cc: Maarten Lankhorst Cc: Christian König Signed-off-by: Daniel Vetter --- drivers/gpu/drm/amd/amdgpu/amdgpu_cs.c | 5 +++++ 1 file changed, 5 insertions(+) diff --git a/drivers/gpu/drm/amd/amdgpu/amdgpu_cs.c b/drivers/gpu/drm/amd/amdgpu/amdgpu_cs.c index a25fb59c127c..e109666aec14 100644 --- a/drivers/gpu/drm/amd/amdgpu/amdgpu_cs.c +++ b/drivers/gpu/drm/amd/amdgpu/amdgpu_cs.c @@ -1212,6 +1212,7 @@ static int amdgpu_cs_submit(struct amdgpu_cs_parser *p, struct amdgpu_job *job; uint64_t seq; int r; + bool fence_cookie; job = p->job; p->job = NULL; @@ -1226,6 +1227,8 @@ static int amdgpu_cs_submit(struct amdgpu_cs_parser *p, */ mutex_lock(&p->adev->notifier_lock); + fence_cookie = dma_fence_begin_signalling(); + /* If userptr are invalidated after amdgpu_cs_parser_bos(), return * -EAGAIN, drmIoctl in libdrm will restart the amdgpu_cs_ioctl. */ @@ -1262,12 +1265,14 @@ static int amdgpu_cs_submit(struct amdgpu_cs_parser *p, amdgpu_vm_move_to_lru_tail(p->adev, &fpriv->vm); ttm_eu_fence_buffer_objects(&p->ticket, &p->validated, p->fence); + dma_fence_end_signalling(fence_cookie); mutex_unlock(&p->adev->notifier_lock); return 0; error_abort: drm_sched_job_cleanup(&job->base); + dma_fence_end_signalling(fence_cookie); mutex_unlock(&p->adev->notifier_lock); error_unlock: