From patchwork Thu Jan 28 21:03:30 2021 Content-Type: text/plain; charset="utf-8" MIME-Version: 1.0 Content-Transfer-Encoding: 7bit X-Patchwork-Submitter: Eric Anholt X-Patchwork-Id: 12054567 Return-Path: X-Spam-Checker-Version: SpamAssassin 3.4.0 (2014-02-07) on aws-us-west-2-korg-lkml-1.web.codeaurora.org X-Spam-Level: X-Spam-Status: No, score=-16.7 required=3.0 tests=BAYES_00,DKIM_SIGNED, DKIM_VALID,HEADER_FROM_DIFFERENT_DOMAINS,INCLUDES_CR_TRAILER,INCLUDES_PATCH, MAILING_LIST_MULTI,SPF_HELO_NONE,SPF_PASS,URIBL_BLOCKED,USER_AGENT_GIT autolearn=unavailable autolearn_force=no version=3.4.0 Received: from mail.kernel.org (mail.kernel.org [198.145.29.99]) by smtp.lore.kernel.org (Postfix) with ESMTP id F3968C433E6 for ; Thu, 28 Jan 2021 21:05:49 +0000 (UTC) Received: from vger.kernel.org (vger.kernel.org [23.128.96.18]) by mail.kernel.org (Postfix) with ESMTP id D0C3A64D9E for ; Thu, 28 Jan 2021 21:05:49 +0000 (UTC) Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S229817AbhA1VFA (ORCPT ); Thu, 28 Jan 2021 16:05:00 -0500 Received: from lindbergh.monkeyblade.net ([23.128.96.19]:43244 "EHLO lindbergh.monkeyblade.net" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S229627AbhA1VE5 (ORCPT ); Thu, 28 Jan 2021 16:04:57 -0500 Received: from mail-pj1-x1030.google.com (mail-pj1-x1030.google.com [IPv6:2607:f8b0:4864:20::1030]) by lindbergh.monkeyblade.net (Postfix) with ESMTPS id E6FD8C061786 for ; Thu, 28 Jan 2021 13:03:42 -0800 (PST) Received: by mail-pj1-x1030.google.com with SMTP id gx1so5104947pjb.1 for ; Thu, 28 Jan 2021 13:03:42 -0800 (PST) DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=anholt-net.20150623.gappssmtp.com; s=20150623; h=from:to:cc:subject:date:message-id:in-reply-to:references :mime-version:content-transfer-encoding; bh=xNfBPwYfgsBSy1wDSz2WDgPZoXq5g0HMvo6xSOSu00M=; b=S6j/PqbkLtwEeSQpJ+aJEw7KBv2Mt/4WB2aag3aMYfR5dzhf+BknM5FUJYPzqZPTPz lguUYUBcInDBr177yL6Ba1Wmm8ywSj2BcKKAZLj8St7nJJHWxb26XjpoTaxa1GSbUEi0 QeFl2aaEVdS2ZDR3SLOio7R3EYsCnQvm+lZAkdPxNimbhDwTR/3Jig6brSNwkO4x0sN5 RMuXkx6vNP3rM8TUBAptJGpk+x6poUKq1ofgr0km/cUe1tNk19fGZ+cFJldMYzKsBoBF tl2kTdqNHBgcBJJ+tt0vzQQj5atOpf6M7FXYBHHP7/mJ+oKWxcGDjTyPYI/EWEgBECD2 6k2w== 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=xNfBPwYfgsBSy1wDSz2WDgPZoXq5g0HMvo6xSOSu00M=; b=dIr1tv99UpzVYTAgYVBEVdKTBnA9dqMdwb2mjljKXhOc3uYnw1unSoWqGae6sxKQH2 OSP3BE2uaS62aKZvxy51LS/1vroufUDW/38fTqihk2C+0rHQY8aSoGRb0cFOgESwtl59 +KAqi/Sj7NVpYV0DgreXPCiqzsq/IAI0l2awvRk+VU8qgb+Mo9cW1lwcxbJOj/Msa902 RFQsrGa+EVbMwJcmguXi/4XkRhTPmEx2I6a7JNfyAMvBqcNCqQ6/nFsu+F6pyC7Ep/mY 3p2tO0IiN7C86dgULknX5lnJWwntvLOZtsJQoifwNzql1IyRnh3L4B10e71eOitjlNKb Es/g== X-Gm-Message-State: AOAM533+ixvt7wa72fpnkW9fBhnv5UBqb+J0BqTgFdGiWWZU92F5hJ9N IkV9sWjICRWJABiIlrUcepNIqA== X-Google-Smtp-Source: ABdhPJwvhskvFjE8OIpHytiQ+6Cvx25s2QGl06oPVWDhnPwd38ZARaeOvNGVc+5VJLo5XXd34+v7NQ== X-Received: by 2002:a17:90b:309:: with SMTP id ay9mr1202817pjb.145.1611867822526; Thu, 28 Jan 2021 13:03:42 -0800 (PST) Received: from wildbow.anholt.net ([75.164.105.146]) by smtp.gmail.com with ESMTPSA id l2sm6753295pga.65.2021.01.28.13.03.41 (version=TLS1_3 cipher=TLS_AES_256_GCM_SHA384 bits=256/256); Thu, 28 Jan 2021 13:03:41 -0800 (PST) From: Eric Anholt To: dri-devel@lists.freedesktop.org, linux-arm-msm@vger.kernel.org, freedreno@lists.freedesktop.org, Rob Clark , Sean Paul , Jordan Crouse Cc: linux-kernel@vger.kernel.org, Eric Anholt Subject: [PATCH v3 1/3] drm/msm: Fix race of GPU init vs timestamp power management. Date: Thu, 28 Jan 2021 13:03:30 -0800 Message-Id: <20210128210332.1690609-2-eric@anholt.net> X-Mailer: git-send-email 2.30.0 In-Reply-To: <20210128210332.1690609-1-eric@anholt.net> References: <20210128210332.1690609-1-eric@anholt.net> MIME-Version: 1.0 Precedence: bulk List-ID: X-Mailing-List: linux-arm-msm@vger.kernel.org We were using the same force-poweron bit in the two codepaths, so they could race to have one of them lose GPU power early. freedreno CI was seeing intermittent errors like: [drm:_a6xx_gmu_set_oob] *ERROR* Timeout waiting for GMU OOB set GPU_SET: 0x0 and this issue could have contributed to it. Signed-off-by: Eric Anholt Fixes: 4b565ca5a2cb ("drm/msm: Add A6XX device support") Reviewed-by: Jordan Crouse --- drivers/gpu/drm/msm/adreno/a6xx_gmu.c | 25 ++++++++++++++++++++++--- drivers/gpu/drm/msm/adreno/a6xx_gmu.h | 8 ++++++++ drivers/gpu/drm/msm/adreno/a6xx_gpu.c | 4 ++-- 3 files changed, 32 insertions(+), 5 deletions(-) diff --git a/drivers/gpu/drm/msm/adreno/a6xx_gmu.c b/drivers/gpu/drm/msm/adreno/a6xx_gmu.c index e6703ae98760..b3318f86aabc 100644 --- a/drivers/gpu/drm/msm/adreno/a6xx_gmu.c +++ b/drivers/gpu/drm/msm/adreno/a6xx_gmu.c @@ -264,6 +264,16 @@ int a6xx_gmu_set_oob(struct a6xx_gmu *gmu, enum a6xx_gmu_oob_state state) } name = "GPU_SET"; break; + case GMU_OOB_PERFCOUNTER_SET: + if (gmu->legacy) { + request = GMU_OOB_PERFCOUNTER_REQUEST; + ack = GMU_OOB_PERFCOUNTER_ACK; + } else { + request = GMU_OOB_PERFCOUNTER_REQUEST_NEW; + ack = GMU_OOB_PERFCOUNTER_ACK_NEW; + } + name = "PERFCOUNTER"; + break; case GMU_OOB_BOOT_SLUMBER: request = GMU_OOB_BOOT_SLUMBER_REQUEST; ack = GMU_OOB_BOOT_SLUMBER_ACK; @@ -301,9 +311,14 @@ int a6xx_gmu_set_oob(struct a6xx_gmu *gmu, enum a6xx_gmu_oob_state state) void a6xx_gmu_clear_oob(struct a6xx_gmu *gmu, enum a6xx_gmu_oob_state state) { if (!gmu->legacy) { - WARN_ON(state != GMU_OOB_GPU_SET); - gmu_write(gmu, REG_A6XX_GMU_HOST2GMU_INTR_SET, - 1 << GMU_OOB_GPU_SET_CLEAR_NEW); + if (state == GMU_OOB_GPU_SET) { + gmu_write(gmu, REG_A6XX_GMU_HOST2GMU_INTR_SET, + 1 << GMU_OOB_GPU_SET_CLEAR_NEW); + } else { + WARN_ON(state != GMU_OOB_PERFCOUNTER_SET); + gmu_write(gmu, REG_A6XX_GMU_HOST2GMU_INTR_SET, + 1 << GMU_OOB_PERFCOUNTER_CLEAR_NEW); + } return; } @@ -312,6 +327,10 @@ void a6xx_gmu_clear_oob(struct a6xx_gmu *gmu, enum a6xx_gmu_oob_state state) gmu_write(gmu, REG_A6XX_GMU_HOST2GMU_INTR_SET, 1 << GMU_OOB_GPU_SET_CLEAR); break; + case GMU_OOB_PERFCOUNTER_SET: + gmu_write(gmu, REG_A6XX_GMU_HOST2GMU_INTR_SET, + 1 << GMU_OOB_PERFCOUNTER_CLEAR); + break; case GMU_OOB_BOOT_SLUMBER: gmu_write(gmu, REG_A6XX_GMU_HOST2GMU_INTR_SET, 1 << GMU_OOB_BOOT_SLUMBER_CLEAR); diff --git a/drivers/gpu/drm/msm/adreno/a6xx_gmu.h b/drivers/gpu/drm/msm/adreno/a6xx_gmu.h index c6d2bced8e5d..9fa278de2106 100644 --- a/drivers/gpu/drm/msm/adreno/a6xx_gmu.h +++ b/drivers/gpu/drm/msm/adreno/a6xx_gmu.h @@ -156,6 +156,7 @@ enum a6xx_gmu_oob_state { GMU_OOB_BOOT_SLUMBER = 0, GMU_OOB_GPU_SET, GMU_OOB_DCVS_SET, + GMU_OOB_PERFCOUNTER_SET, }; /* These are the interrupt / ack bits for each OOB request that are set @@ -190,6 +191,13 @@ enum a6xx_gmu_oob_state { #define GMU_OOB_GPU_SET_ACK_NEW 31 #define GMU_OOB_GPU_SET_CLEAR_NEW 31 +#define GMU_OOB_PERFCOUNTER_REQUEST 17 +#define GMU_OOB_PERFCOUNTER_ACK 25 +#define GMU_OOB_PERFCOUNTER_CLEAR 25 + +#define GMU_OOB_PERFCOUNTER_REQUEST_NEW 28 +#define GMU_OOB_PERFCOUNTER_ACK_NEW 30 +#define GMU_OOB_PERFCOUNTER_CLEAR_NEW 30 void a6xx_hfi_init(struct a6xx_gmu *gmu); int a6xx_hfi_start(struct a6xx_gmu *gmu, int boot_state); diff --git a/drivers/gpu/drm/msm/adreno/a6xx_gpu.c b/drivers/gpu/drm/msm/adreno/a6xx_gpu.c index c8a9010c1a1d..7424a70b9d35 100644 --- a/drivers/gpu/drm/msm/adreno/a6xx_gpu.c +++ b/drivers/gpu/drm/msm/adreno/a6xx_gpu.c @@ -1177,12 +1177,12 @@ static int a6xx_get_timestamp(struct msm_gpu *gpu, uint64_t *value) struct a6xx_gpu *a6xx_gpu = to_a6xx_gpu(adreno_gpu); /* Force the GPU power on so we can read this register */ - a6xx_gmu_set_oob(&a6xx_gpu->gmu, GMU_OOB_GPU_SET); + a6xx_gmu_set_oob(&a6xx_gpu->gmu, GMU_OOB_PERFCOUNTER_SET); *value = gpu_read64(gpu, REG_A6XX_RBBM_PERFCTR_CP_0_LO, REG_A6XX_RBBM_PERFCTR_CP_0_HI); - a6xx_gmu_clear_oob(&a6xx_gpu->gmu, GMU_OOB_GPU_SET); + a6xx_gmu_clear_oob(&a6xx_gpu->gmu, GMU_OOB_PERFCOUNTER_SET); return 0; }