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 X-Spam-Level: X-Spam-Status: No, score=-12.5 required=3.0 tests=BAYES_00, DKIM_ADSP_CUSTOM_MED,DKIM_INVALID,DKIM_SIGNED,FREEMAIL_FORGED_FROMDOMAIN, FREEMAIL_FROM,HEADER_FROM_DIFFERENT_DOMAINS,INCLUDES_PATCH,MAILING_LIST_MULTI, SIGNED_OFF_BY,SPF_HELO_NONE,SPF_PASS,URIBL_BLOCKED,USER_AGENT_GIT autolearn=ham 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 B6433C433E6 for ; Tue, 1 Sep 2020 16:46:27 +0000 (UTC) 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 mail.kernel.org (Postfix) with ESMTPS id 81EEA2067C for ; Tue, 1 Sep 2020 16:46:27 +0000 (UTC) Authentication-Results: mail.kernel.org; dkim=fail reason="signature verification failed" (2048-bit key) header.d=gmail.com header.i=@gmail.com header.b="jfADtGc2" DMARC-Filter: OpenDMARC Filter v1.3.2 mail.kernel.org 81EEA2067C Authentication-Results: mail.kernel.org; dmarc=fail (p=none dis=none) header.from=gmail.com Authentication-Results: mail.kernel.org; spf=none smtp.mailfrom=dri-devel-bounces@lists.freedesktop.org Received: from gabe.freedesktop.org (localhost [127.0.0.1]) by gabe.freedesktop.org (Postfix) with ESMTP id F0A1C6E899; Tue, 1 Sep 2020 16:46:26 +0000 (UTC) Received: from mail-pl1-x641.google.com (mail-pl1-x641.google.com [IPv6:2607:f8b0:4864:20::641]) by gabe.freedesktop.org (Postfix) with ESMTPS id A210F6E899 for ; Tue, 1 Sep 2020 16:46:25 +0000 (UTC) Received: by mail-pl1-x641.google.com with SMTP id k13so799362plk.13 for ; Tue, 01 Sep 2020 09:46:25 -0700 (PDT) DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=gmail.com; s=20161025; h=from:to:cc:subject:date:message-id:in-reply-to:references :mime-version:content-transfer-encoding; bh=Tk5zPp0nu93VQrlRpBetxr1lff5xE8i/LH2EjPSUXEI=; b=jfADtGc2ZPCjhynKOdCJEaVZwckWuNnvv0bA+wk9rmOjtBW3xWIDyC6ePwcx4A24/i 6vn81mR2qNa14TEuW0kfe6glsktawQ1wOLEdACNI/tLpDGFwh8en3sZP3gJeIno6a7eD qo1y7fY8cSKmdS6eK9Tx9pEZ8LYZC9hNnmqMblP6vQt1ZGGTmAY6qFVHOUDQMcUU/YRh X+51rpiAjLJN8TJZhjJGGWh1gSTKuI8vvMP8H0bWvCzGUfPZdLvlZz+aiNDVyKTkBYTX 9lm/yEsLeSlOO+JoGVjnYwbwZutIZjR0i2wrCnjW/xo/Ipu7ChHwMkU8FaYvLbHqQYsI k0LA== 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=Tk5zPp0nu93VQrlRpBetxr1lff5xE8i/LH2EjPSUXEI=; b=a8kuBKVKDv2X9VwkkvqJYcUsC6GQdcQwYb8KPedfWrPQ71sDdc3wQLvBymsckL0bZ1 3o99kz+rnluCIVtSD9vo6eGVzQ48fnGykeuTOICbLC7xPLj90XNNowFZ5ENiTisOameH Mn1fGLT/HxYY0y1Q51Xc0EZ29fhn1bBFjGikgvqLp3NMCKCpRO3bwb5LaB8/lda1Y8W9 qPdoCb7zsjL8fJS0rkV6Y7OdqSvs/2B8dHWSs4IxyTJoOXoqtIzmLdoGckAKWGJZyspn ngmeNt/Hw/5+G31atIijBkPXG5ltk45Bk+F8uqrneNTEMc7xf/vGOxWlF/pR2RkmidW2 NixQ== X-Gm-Message-State: AOAM533EuYaYPK7FFZmj3qQQUI9Ykt36ArthZjQXnrGtwZfBzjDNdaAM TwBvBP9+jlBEDs3hugpSY94i1C1O/Wjmug== X-Google-Smtp-Source: ABdhPJyTygZSGFX5eIM6/dkAIywFF35ZHmq9xGT/4duvrNw2xgG3rUQmmclMh4zKcn0Nwpq4ubuUiw== X-Received: by 2002:a17:90a:dac5:: with SMTP id g5mr2325737pjx.5.1598978784522; Tue, 01 Sep 2020 09:46:24 -0700 (PDT) Received: from localhost ([2601:1c0:5200:a6:307:a401:7b76:c6e5]) by smtp.gmail.com with ESMTPSA id u123sm2401020pfb.209.2020.09.01.09.46.23 (version=TLS1_3 cipher=TLS_AES_256_GCM_SHA384 bits=256/256); Tue, 01 Sep 2020 09:46:23 -0700 (PDT) From: Rob Clark To: dri-devel@lists.freedesktop.org, iommu@lists.linux-foundation.org, linux-arm-msm@vger.kernel.org, Will Deacon , Robin Murphy Subject: [PATCH v16 02/20] drm/msm: Add private interface for adreno-smmu Date: Tue, 1 Sep 2020 09:46:19 -0700 Message-Id: <20200901164707.2645413-3-robdclark@gmail.com> X-Mailer: git-send-email 2.26.2 In-Reply-To: <20200901164707.2645413-1-robdclark@gmail.com> References: <20200901164707.2645413-1-robdclark@gmail.com> MIME-Version: 1.0 X-BeenThere: dri-devel@lists.freedesktop.org X-Mailman-Version: 2.1.29 Precedence: list List-Id: Direct Rendering Infrastructure - Development List-Unsubscribe: , List-Archive: List-Post: List-Help: List-Subscribe: , Cc: Rob Clark , open list , Akhil P Oommen , Stephen Boyd , Sibi Sankar , Vivek Gautam , Bjorn Andersson Content-Type: text/plain; charset="us-ascii" Content-Transfer-Encoding: 7bit Errors-To: dri-devel-bounces@lists.freedesktop.org Sender: "dri-devel" From: Rob Clark This interface will be used for drm/msm to coordinate with the qcom_adreno_smmu_impl to enable/disable TTBR0 translation. Once TTBR0 translation is enabled, the GPU's CP (Command Processor) will directly switch TTBR0 pgtables (and do the necessary TLB inv) synchronized to the GPU's operation. But help from the SMMU driver is needed to initially bootstrap TTBR0 translation, which cannot be done from the GPU. Since this is a very special case, a private interface is used to avoid adding highly driver specific things to the public iommu interface. Signed-off-by: Rob Clark Reviewed-by: Jordan Crouse Reviewed-by: Bjorn Andersson --- include/linux/adreno-smmu-priv.h | 36 ++++++++++++++++++++++++++++++++ 1 file changed, 36 insertions(+) create mode 100644 include/linux/adreno-smmu-priv.h diff --git a/include/linux/adreno-smmu-priv.h b/include/linux/adreno-smmu-priv.h new file mode 100644 index 000000000000..a889f28afb42 --- /dev/null +++ b/include/linux/adreno-smmu-priv.h @@ -0,0 +1,36 @@ +// SPDX-License-Identifier: GPL-2.0-only +/* + * Copyright (C) 2020 Google, Inc + */ + +#ifndef __ADRENO_SMMU_PRIV_H +#define __ADRENO_SMMU_PRIV_H + +#include + +/** + * struct adreno_smmu_priv - private interface between adreno-smmu and GPU + * + * @cookie: An opque token provided by adreno-smmu and passed + * back into the callbacks + * @get_ttbr1_cfg: Get the TTBR1 config for the GPUs context-bank + * @set_ttbr0_cfg: Set the TTBR0 config for the GPUs context bank. A + * NULL config disables TTBR0 translation, otherwise + * TTBR0 translation is enabled with the specified cfg + * + * The GPU driver (drm/msm) and adreno-smmu work together for controlling + * the GPU's SMMU instance. This is by necessity, as the GPU is directly + * updating the SMMU for context switches, while on the other hand we do + * not want to duplicate all of the initial setup logic from arm-smmu. + * + * This private interface is used for the two drivers to coordinate. The + * cookie and callback functions are populated when the GPU driver attaches + * it's domain. + */ +struct adreno_smmu_priv { + const void *cookie; + const struct io_pgtable_cfg *(*get_ttbr1_cfg)(const void *cookie); + int (*set_ttbr0_cfg)(const void *cookie, const struct io_pgtable_cfg *cfg); +}; + +#endif /* __ADRENO_SMMU_PRIV_H */ \ No newline at end of file -- 2.26.2 _______________________________________________ dri-devel mailing list dri-devel@lists.freedesktop.org https://lists.freedesktop.org/mailman/listinfo/dri-devel