From patchwork Tue May 9 16:37:11 2023 Content-Type: text/plain; charset="utf-8" MIME-Version: 1.0 Content-Transfer-Encoding: 7bit X-Patchwork-Submitter: Rob Clark X-Patchwork-Id: 13235947 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 347CEC77B75 for ; Tue, 9 May 2023 16:37:25 +0000 (UTC) Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S229491AbjEIQhX (ORCPT ); Tue, 9 May 2023 12:37:23 -0400 Received: from lindbergh.monkeyblade.net ([23.128.96.19]:52732 "EHLO lindbergh.monkeyblade.net" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S231468AbjEIQhU (ORCPT ); Tue, 9 May 2023 12:37:20 -0400 Received: from mail-pg1-x52d.google.com (mail-pg1-x52d.google.com [IPv6:2607:f8b0:4864:20::52d]) by lindbergh.monkeyblade.net (Postfix) with ESMTPS id 8BEB6422A; Tue, 9 May 2023 09:37:19 -0700 (PDT) Received: by mail-pg1-x52d.google.com with SMTP id 41be03b00d2f7-51b0f9d7d70so5721256a12.1; Tue, 09 May 2023 09:37:19 -0700 (PDT) DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=gmail.com; s=20221208; t=1683650239; x=1686242239; h=content-transfer-encoding:mime-version:references:in-reply-to :message-id:date:subject:cc:to:from:from:to:cc:subject:date :message-id:reply-to; bh=osWWYYQseCvJCBZt1Q3stKtUhhbUrnP9MQ0pNGBM3gY=; b=mZZAJf8CDVLdRsIa/eB31WvC02gURKhS4JsgGIM1FMEfS0TPzOSNr2ofLgpB/7d36u t+huw2YXaVGECPsBBtfOGhjyjvU670c59fAbXlO8Yz+yLMEUksGNyv+BRDQD8VIZFfkh mghLEYlEXXdGTtZG9Ss2M4RDBoz3VsqKzX4/E8mXGpRx7MCzH6pSJS/kmC3o3x8ob2+r FaoysUGQAZtMPp33CmjiOwLcYoRVcG/j5VesdRfj9iwmMnTVtHtTdQnXLroAzQ5BYpuw Dk4me3Nis+OCHDDn/PHz6ClQak2AclwSy1vmc119W+tNEFEBpb/qq08kUvh8KKxLAnzZ bRrw== X-Google-DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=1e100.net; s=20221208; t=1683650239; x=1686242239; h=content-transfer-encoding:mime-version:references:in-reply-to :message-id:date:subject:cc:to:from:x-gm-message-state:from:to:cc :subject:date:message-id:reply-to; bh=osWWYYQseCvJCBZt1Q3stKtUhhbUrnP9MQ0pNGBM3gY=; b=eB2ORro4/JCJra4QED8eWUrG7UHPk3XlWwGiwuZFTaoP6Y3oT/WNroE3NHeCfTG8+D htWmWMijLHP88Gihpmj5QU2XbRiT0GHUbqlXvnxJ3pt/IkouLGnBquFUg6htDodNV8SZ 5tcr6UgnMyQMfUvxytWzGrgXVPMUQXtazgAasFB8R1kEDS7nEJ96JJGrnLqcjMyVfSO3 bvON6oVnu2DFgL4/NqcPMKtOG7FTJjPRKvkZNr4lmCdRYlXh5bcKaJMbyymmVVv+yrbZ obT8kiU7EaNpZtBIP03I5QvUVa/j3ouVRssHuNCIsB8K/LN9T4IVwWxFJjex2abWRn6T Pvig== X-Gm-Message-State: AC+VfDzPjrcxWvdEmGLR3Ta514UmMRQ/rfYpZgCh7db1YtVRKVh4cbDh I+WwPwbT6/SRHjcL3NUTKQw= X-Google-Smtp-Source: ACHHUZ5LYRtJdAdxjy+ccn4spz1/vSAxQC2cahvFcQb+ES2TNjUqZm2oJKcFVWN0/5kCALhertuX3Q== X-Received: by 2002:a17:902:b110:b0:1aa:f6ed:973d with SMTP id q16-20020a170902b11000b001aaf6ed973dmr12646582plr.55.1683650239053; Tue, 09 May 2023 09:37:19 -0700 (PDT) Received: from localhost ([2a00:79e1:abd:4a00:61b:48ed:72ab:435b]) by smtp.gmail.com with ESMTPSA id m24-20020a170902bb9800b001a217a7a11csm1812272pls.131.2023.05.09.09.37.18 (version=TLS1_3 cipher=TLS_AES_256_GCM_SHA384 bits=256/256); Tue, 09 May 2023 09:37:18 -0700 (PDT) From: Rob Clark To: dri-devel@lists.freedesktop.org, iommu@lists.linux-foundation.org Cc: freedreno@lists.freedesktop.org, linux-arm-msm@vger.kernel.org, Dmitry Baryshkov , Rob Clark , Rob Clark , Abhinav Kumar , Sean Paul , David Airlie , Daniel Vetter , linux-kernel@vger.kernel.org (open list) Subject: [PATCH 2/2] drm/msm: Be more shouty if per-process pgtables aren't working Date: Tue, 9 May 2023 09:37:11 -0700 Message-Id: <20230509163712.376117-2-robdclark@gmail.com> X-Mailer: git-send-email 2.40.1 In-Reply-To: <20230509163712.376117-1-robdclark@gmail.com> References: <20230509163712.376117-1-robdclark@gmail.com> MIME-Version: 1.0 Precedence: bulk List-ID: X-Mailing-List: linux-arm-msm@vger.kernel.org From: Rob Clark Otherwise it is not always obvious if a dt or iommu change is causing us to fall back to global pgtable. Signed-off-by: Rob Clark --- drivers/gpu/drm/msm/msm_iommu.c | 7 ++++++- 1 file changed, 6 insertions(+), 1 deletion(-) diff --git a/drivers/gpu/drm/msm/msm_iommu.c b/drivers/gpu/drm/msm/msm_iommu.c index 418e1e06cdde..9b19124c9bd0 100644 --- a/drivers/gpu/drm/msm/msm_iommu.c +++ b/drivers/gpu/drm/msm/msm_iommu.c @@ -227,21 +227,26 @@ struct msm_mmu *msm_iommu_pagetable_create(struct msm_mmu *parent) struct adreno_smmu_priv *adreno_smmu = dev_get_drvdata(parent->dev); struct msm_iommu *iommu = to_msm_iommu(parent); struct msm_iommu_pagetable *pagetable; const struct io_pgtable_cfg *ttbr1_cfg = NULL; struct io_pgtable_cfg ttbr0_cfg; int ret; /* Get the pagetable configuration from the domain */ if (adreno_smmu->cookie) ttbr1_cfg = adreno_smmu->get_ttbr1_cfg(adreno_smmu->cookie); - if (!ttbr1_cfg) + + /* + * If you hit this WARN_ONCE() you are probably missing an entry in + * qcom_smmu_impl_of_match[] in arm-smmu-qcom.c + */ + if (WARN_ONCE(!ttbr1_cfg, "No per-process page tables")) return ERR_PTR(-ENODEV); pagetable = kzalloc(sizeof(*pagetable), GFP_KERNEL); if (!pagetable) return ERR_PTR(-ENOMEM); msm_mmu_init(&pagetable->base, parent->dev, &pagetable_funcs, MSM_MMU_IOMMU_PAGETABLE); /* Clone the TTBR1 cfg as starting point for TTBR0 cfg: */