From patchwork Fri Aug 14 02:41:00 2020 Content-Type: text/plain; charset="utf-8" MIME-Version: 1.0 Content-Transfer-Encoding: 7bit X-Patchwork-Submitter: Rob Clark X-Patchwork-Id: 11713389 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 4F0311744 for ; Fri, 14 Aug 2020 02:41:21 +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 2C2C022B43 for ; Fri, 14 Aug 2020 02:41:21 +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="nZLLpPvj" DMARC-Filter: OpenDMARC Filter v1.3.2 mail.kernel.org 2C2C022B43 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 5BA546EAD6; Fri, 14 Aug 2020 02:41:20 +0000 (UTC) X-Original-To: dri-devel@lists.freedesktop.org Delivered-To: dri-devel@lists.freedesktop.org Received: from mail-pl1-x644.google.com (mail-pl1-x644.google.com [IPv6:2607:f8b0:4864:20::644]) by gabe.freedesktop.org (Postfix) with ESMTPS id BA8FD6EAD6; Fri, 14 Aug 2020 02:41:19 +0000 (UTC) Received: by mail-pl1-x644.google.com with SMTP id y10so1957345plr.11; Thu, 13 Aug 2020 19:41:19 -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=FspYJi5b1hDkayAuxe5bJyODfoD6HOjHOWIvusSE/vI=; b=nZLLpPvjLe9K005QO2evIQ8MudrrODia0dJqPigpQsSxUTX4bwqLblnKrOB5qIW7vn 9sIqUs6Q/ygw02YyUpYyn8xZz/+3guIh7kLS0ujNUmebOIrIG5pjB8SUyzYqoZCUV8pX ko6jlmysPqCVn13XpZESoEN0axT9C0pNYCz1ga2+lK75vlJV6zfx4p7udN3ZjgoUUjLi ZoYzoSWM09knlEWpq2+AhwxqjZe+UKNuoIatnN1LPxVzTNvjm0hY0KJ9S0+IlK++I6wv e4/CKnYalLkSZ3vtOPNMK4PtsmfTm5yoSo2QJR1nvcKBffEdtzgtLt6FQhtCmGy7JKhT gi8Q== 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=FspYJi5b1hDkayAuxe5bJyODfoD6HOjHOWIvusSE/vI=; b=lm7rbvfeNC8an8zmSHdyQw2h87dFbOoUxf2qGjEoVtBOWJzwMzH9YNvivFscMkEqHI d9STdXFXtTabND7+s5M2BYqID9MvFz2CMeGhkqIVeIOfcqIcnQtkJFMHtHwGzpK73D6F X0xPnHaw/EEpr6gzqdONL/INMXwWfEB4nRl/GnprBcCcX563D/7Eo4kYN7HOIrkD12iq Z2vItRsUbKmK7Jd3fij1y5wSSkS6CEK10FMt440BcgeYCCJ0DsG/Ik4+cjNTEILjAi04 n+FChMVoX+oGveYGDEErBQCD7h661JJfyXro1+B2tJVLjxd6mHrtClGoK76KF1okRxp5 5VAA== X-Gm-Message-State: AOAM533W6kdxq5Ofx2sF8XyYn+2naJf6+Up+dzV/pfQqj+yDaVYArn2c 6utC4tV+RxwkpHiNY0eVsz3RU0W057Q= X-Google-Smtp-Source: ABdhPJyApFifBdG/BErKYfSE+ROJky+gOYbvj/dZUwC4BZypLAHrLrDaPxIedf98VwYmNp+xA8NOYg== X-Received: by 2002:a17:90a:ce97:: with SMTP id g23mr554277pju.216.1597372879026; Thu, 13 Aug 2020 19:41:19 -0700 (PDT) Received: from localhost ([2601:1c0:5200:a6:307:a401:7b76:c6e5]) by smtp.gmail.com with ESMTPSA id il13sm6794205pjb.0.2020.08.13.19.41.17 (version=TLS1_3 cipher=TLS_AES_256_GCM_SHA384 bits=256/256); Thu, 13 Aug 2020 19:41:18 -0700 (PDT) From: Rob Clark To: dri-devel@lists.freedesktop.org, iommu@lists.linux-foundation.org, linux-arm-msm@vger.kernel.org Subject: [PATCH 05/19] iommu: add private interface for adreno-smmu Date: Thu, 13 Aug 2020 19:41:00 -0700 Message-Id: <20200814024114.1177553-6-robdclark@gmail.com> X-Mailer: git-send-email 2.26.2 In-Reply-To: <20200810222657.1841322-1-jcrouse@codeaurora.org> References: <20200810222657.1841322-1-jcrouse@codeaurora.org> 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 , Sai Prakash Ranjan , open list , Will Deacon , Joerg Roedel , Robin Murphy , Bjorn Andersson , Sibi Sankar , Vivek Gautam , Stephen Boyd , freedreno@lists.freedesktop.org, linux-arm-kernel@lists.infradead.org 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