From patchwork Tue Mar 1 16:14:46 2022 Content-Type: text/plain; charset="utf-8" MIME-Version: 1.0 Content-Transfer-Encoding: 7bit X-Patchwork-Submitter: Mikko Perttunen X-Patchwork-Id: 547330 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 BE581C3527C for ; Tue, 1 Mar 2022 16:15:49 +0000 (UTC) Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S233829AbiCAQQ2 (ORCPT ); Tue, 1 Mar 2022 11:16:28 -0500 Received: from lindbergh.monkeyblade.net ([23.128.96.19]:42094 "EHLO lindbergh.monkeyblade.net" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S234513AbiCAQQT (ORCPT ); Tue, 1 Mar 2022 11:16:19 -0500 Received: from mail.kapsi.fi (mail.kapsi.fi [IPv6:2001:67c:1be8::25]) by lindbergh.monkeyblade.net (Postfix) with ESMTPS id 3F160954A3; Tue, 1 Mar 2022 08:15:34 -0800 (PST) DKIM-Signature: v=1; a=rsa-sha256; q=dns/txt; c=relaxed/relaxed; d=kapsi.fi; s=20161220; h=Content-Transfer-Encoding:MIME-Version:Message-Id:Date:Subject :Cc:To:From:Sender:Reply-To:Content-Type:Content-ID:Content-Description: Resent-Date:Resent-From:Resent-Sender:Resent-To:Resent-Cc:Resent-Message-ID: In-Reply-To:References:List-Id:List-Help:List-Unsubscribe:List-Subscribe: List-Post:List-Owner:List-Archive; bh=VGbStSHHARqJktrOgniVFQ6u0YwBTQjRQ0LEmnlIFkk=; b=IGDQmo+alZXTaMgomNyLpt9hOp RpRfQKGalr145FjoQqtQsOfL0gL723d/LvXjlKaftAggH2uEPmGCY8o1ZgSQDSlcd/oO8f9ouw8rl e64D/b+z1RNubnT4aeNXTRH/kfN4GJ0voe5AkBq58ziumHy5WTyWnReXt5IwjGhoyn5o+gSYYZ1Ya Jp9nIN17ohV73LcDbtqdW2jIf9x8w+yQhCxKbQmNSx0px19iOqreuBfln8TeGuPjV+DvejSaeeyqU 9ooN3s3wnAQ2qpLtJOMkLeyWf+8dG8dxtYVQLY5ub3XtuzaatMqVW8fy6m0hi11EMGTmX6rolKY8f JBQ21oJA==; Received: from 91-158-25-70.elisa-laajakaista.fi ([91.158.25.70] helo=toshino.localdomain) by mail.kapsi.fi with esmtpsa (TLS1.2:ECDHE_RSA_AES_128_GCM_SHA256:128) (Exim 4.89) (envelope-from ) id 1nP59q-0003Z8-EU; Tue, 01 Mar 2022 18:15:26 +0200 From: cyndis@kapsi.fi To: thierry.reding@gmail.com, jonathanh@nvidia.com, joro@8bytes.org, will@kernel.org, robin.murphy@arm.com, robh+dt@kernel.org, krzysztof.kozlowski@canonical.com Cc: linux-tegra@vger.kernel.org, dri-devel@lists.freedesktop.org, iommu@lists.linux-foundation.org, linux-kernel@vger.kernel.org, devicetree@vger.kernel.org, linux-arm-kernel@lists.infradead.org, Mikko Perttunen Subject: [PATCH v4 0/9] Host1x context isolation support Date: Tue, 1 Mar 2022 18:14:46 +0200 Message-Id: <20220301161455.4037062-1-cyndis@kapsi.fi> X-Mailer: git-send-email 2.35.0 MIME-Version: 1.0 X-SA-Exim-Connect-IP: 91.158.25.70 X-SA-Exim-Mail-From: cyndis@kapsi.fi X-SA-Exim-Scanned: No (on mail.kapsi.fi); SAEximRunCond expanded to false Precedence: bulk List-ID: X-Mailing-List: devicetree@vger.kernel.org From: Mikko Perttunen *** New in v4: Addressed review comments. See individual patches. *** *** New in v3: Added device tree bindings for new property. *** *** New in v2: Added support for Tegra194 Use standard iommu-map property instead of custom mechanism *** This series adds support for Host1x 'context isolation'. Since when programming engines through Host1x, userspace can program in any addresses it wants, we need some way to isolate the engines' memory spaces. Traditionally this has either been done imperfectly with a single shared IOMMU domain, or by copying and verifying the programming command stream at submit time (Host1x firewall). Since Tegra186 there is a privileged (only usable by kernel) Host1x opcode that allows setting the stream ID sent by the engine to the SMMU. So, by allocating a number of context banks and stream IDs for this purpose, and using this opcode at the beginning of each job, we can implement isolation. Due to the limited number of context banks only each process gets its own context, and not each channel. This feature also allows sharing engines among multiple VMs when used with Host1x's hardware virtualization support - up to 8 VMs can be configured with a subset of allowed stream IDs, enforced at hardware level. To implement this, this series adds a new host1x context bus, which will contain the 'struct device's corresponding to each context bank / stream ID, changes to device tree and SMMU code to allow registering the devices and using the bus, as well as the Host1x stream ID programming code and support in TegraDRM. ------------- Merging notes ------------- The changes to DT bindings should be applied on top of Thierry's patch 'dt-bindings: display: tegra: Convert to json-schema'. Thanks, Mikko Mikko Perttunen (9): dt-bindings: host1x: Add iommu-map property gpu: host1x: Add context bus gpu: host1x: Add context device management code gpu: host1x: Program context stream ID on submission iommu/arm-smmu: Attach to host1x context device bus arm64: tegra: Add Host1x context stream IDs on Tegra186+ drm/tegra: falcon: Set DMACTX field on DMA transactions drm/tegra: Support context isolation drm/tegra: vic: Implement get_streamid_offset .../display/tegra/nvidia,tegra20-host1x.yaml | 5 + arch/arm64/boot/dts/nvidia/tegra186.dtsi | 11 ++ arch/arm64/boot/dts/nvidia/tegra194.dtsi | 11 ++ drivers/gpu/Makefile | 3 +- drivers/gpu/drm/tegra/drm.h | 2 + drivers/gpu/drm/tegra/falcon.c | 8 + drivers/gpu/drm/tegra/falcon.h | 1 + drivers/gpu/drm/tegra/submit.c | 21 ++- drivers/gpu/drm/tegra/uapi.c | 45 ++++- drivers/gpu/drm/tegra/vic.c | 68 +++++++- drivers/gpu/host1x/Kconfig | 5 + drivers/gpu/host1x/Makefile | 2 + drivers/gpu/host1x/context.c | 160 ++++++++++++++++++ drivers/gpu/host1x/context.h | 27 +++ drivers/gpu/host1x/context_bus.c | 31 ++++ drivers/gpu/host1x/dev.c | 12 +- drivers/gpu/host1x/dev.h | 2 + drivers/gpu/host1x/hw/channel_hw.c | 52 +++++- drivers/gpu/host1x/hw/host1x06_hardware.h | 10 ++ drivers/gpu/host1x/hw/host1x07_hardware.h | 10 ++ drivers/iommu/arm/arm-smmu/arm-smmu.c | 13 ++ include/linux/host1x.h | 22 +++ include/linux/host1x_context_bus.h | 15 ++ 23 files changed, 518 insertions(+), 18 deletions(-) create mode 100644 drivers/gpu/host1x/context.c create mode 100644 drivers/gpu/host1x/context.h create mode 100644 drivers/gpu/host1x/context_bus.c create mode 100644 include/linux/host1x_context_bus.h