From patchwork Thu May 11 14:59:06 2023 Content-Type: text/plain; charset="utf-8" MIME-Version: 1.0 Content-Transfer-Encoding: 7bit X-Patchwork-Submitter: Rob Clark X-Patchwork-Id: 680937 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 59E20C77B7C for ; Thu, 11 May 2023 14:59:45 +0000 (UTC) Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S238422AbjEKO7m (ORCPT ); Thu, 11 May 2023 10:59:42 -0400 Received: from lindbergh.monkeyblade.net ([23.128.96.19]:56314 "EHLO lindbergh.monkeyblade.net" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S238485AbjEKO7k (ORCPT ); Thu, 11 May 2023 10:59:40 -0400 Received: from mail-pj1-x102b.google.com (mail-pj1-x102b.google.com [IPv6:2607:f8b0:4864:20::102b]) by lindbergh.monkeyblade.net (Postfix) with ESMTPS id CE00910CF; Thu, 11 May 2023 07:59:15 -0700 (PDT) Received: by mail-pj1-x102b.google.com with SMTP id 98e67ed59e1d1-2502346bea0so5394135a91.2; Thu, 11 May 2023 07:59:15 -0700 (PDT) DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=gmail.com; s=20221208; t=1683817155; x=1686409155; 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=XAwtDDfL4AebuXak7bNPPI87nvTlXoYVEeNLYlT0BUwe4sk+v7jj2fSMAaMAVEkLac ASTV+Qd+a+iHRSsrr45q79TD3dqZjxXhxlxvWMDbkTRuogCV00CMQWXjxNJczItOgTLg yIXphxYtHPyqzJRpdLXhyd5kbt7fPsdqfPUEjC07crjg5JAzPfBYhLSaXouULyYUbUSb yAMWFEkA+uKWjPKiyonpbvNWr5WZeGFVeMqxrMvKzKfS2KZtz78sVhZ1nO2EDLxnlvnb 5K6F6qy+H8TL5DZ0JLMmh9pfcfZ/e0whO3kjLiwSmpyWIyju/Pm3UibZf+n+1Ksn+Lci AmeQ== X-Google-DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=1e100.net; s=20221208; t=1683817155; x=1686409155; 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=b13Swe2+lBx0tLXU5CnGigiyLvGp6FJBjwdnXvtYL/PTHyFAG48gPMPKbNCwunuSPb cH+axUDsm6QtUyfgEC+nCYW8WtljXh7x2Xocp6+1fMt4sThqO69Ru2HO0VCNBErgyJos y1qOCQa52JoxGWJ1i8OsOl1aCKr1UzRwXdAJwfBAulyURXjKUh4GXK/OUQAAJP/GMN7X L2aRAcobcozJ/G4Uci/UsQlLF6D60Rd7staJbI4BvYcDXxIbx0BOn3hjcK1KT6ACi9hh bWt6NWFibZuH24FTaysVz6as4+10u5XtF3uCz3saNOgxVf1CuJ54rIyVxCDzCC9B0HeO /jxQ== X-Gm-Message-State: AC+VfDwW8ENFPi3f+enblDT26D+Q4gq7lZoJ12ehOwCVQ8qML5RtysQu H6Cd/cHVxskWdouaOa6rsRo= X-Google-Smtp-Source: ACHHUZ5R5SEh6hgEPBhrxyDoUJPaDfMiz4Rtx25aiaUxPLerkMMf/9r2TREIx7jtkfBBQqUHdw7JYQ== X-Received: by 2002:a17:90b:1992:b0:24e:55c3:89af with SMTP id mv18-20020a17090b199200b0024e55c389afmr21638386pjb.18.1683817154440; Thu, 11 May 2023 07:59:14 -0700 (PDT) Received: from localhost ([2a00:79e1:abd:4a00:61b:48ed:72ab:435b]) by smtp.gmail.com with ESMTPSA id a1-20020a17090acb8100b0024e2980574asm15558660pju.4.2023.05.11.07.59.13 (version=TLS1_3 cipher=TLS_AES_256_GCM_SHA384 bits=256/256); Thu, 11 May 2023 07:59:14 -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 v3 2/2] drm/msm: Be more shouty if per-process pgtables aren't working Date: Thu, 11 May 2023 07:59:06 -0700 Message-Id: <20230511145908.597683-2-robdclark@gmail.com> X-Mailer: git-send-email 2.40.1 In-Reply-To: <20230511145908.597683-1-robdclark@gmail.com> References: <20230511145908.597683-1-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: */