From: Jordan Crouse <jcrouse@codeaurora.org>
To: Rob Clark <robdclark@gmail.com>
Cc: Rob Clark <robdclark@chromium.org>,
freedreno@lists.freedesktop.org, linux-arm-msm@vger.kernel.org,
open list <linux-kernel@vger.kernel.org>,
dri-devel@lists.freedesktop.org,
iommu@lists.linux-foundation.org,
Sibi Sankar <sibis@codeaurora.org>,
Vivek Gautam <vivek.gautam@codeaurora.org>,
Stephen Boyd <swboyd@chromium.org>, Will Deacon <will@kernel.org>,
linux-arm-kernel@lists.infradead.org,
Robin Murphy <robin.murphy@arm.com>
Subject: Re: [Freedreno] [PATCH 05/19] iommu: add private interface for adreno-smmu
Date: Mon, 17 Aug 2020 10:52:59 -0600 [thread overview]
Message-ID: <20200817165259.GH3221@jcrouse1-lnx.qualcomm.com> (raw)
In-Reply-To: <20200814024114.1177553-6-robdclark@gmail.com>
On Thu, Aug 13, 2020 at 07:41:00PM -0700, Rob Clark wrote:
> From: Rob Clark <robdclark@chromium.org>
>
> 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.
>
Reviewed-by: Jordan Crouse <jcrouse@codeaurora.org>
> Signed-off-by: Rob Clark <robdclark@chromium.org>
> ---
> 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 <linux/io-pgtable.h>
> +
> +/**
> + * 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
>
> _______________________________________________
> Freedreno mailing list
> Freedreno@lists.freedesktop.org
> https://lists.freedesktop.org/mailman/listinfo/freedreno
--
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a Linux Foundation Collaborative Project
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next prev parent reply other threads:[~2020-08-17 16:53 UTC|newest]
Thread overview: 73+ messages / expand[flat|nested] mbox.gz Atom feed top
2020-08-10 22:26 [PATCH v12 00/13] iommu/arm-smmu: Add Adreno SMMU specific implementation Jordan Crouse
2020-08-10 22:26 ` [PATCH v12 01/13] iommu/arm-smmu: Pass io-pgtable config to implementation specific function Jordan Crouse
2020-08-10 22:26 ` [PATCH v12 02/13] iommu/arm-smmu: Add support for split pagetables Jordan Crouse
2020-08-10 22:26 ` [PATCH v12 03/13] iommu/arm-smmu: Prepare for the adreno-smmu implementation Jordan Crouse
2020-08-10 22:26 ` [PATCH v12 04/13] iommu: Add a domain attribute to get/set a pagetable configuration Jordan Crouse
2020-08-13 13:14 ` Will Deacon
2020-08-13 15:11 ` [Freedreno] " Rob Clark
2020-08-13 15:19 ` Will Deacon
2020-08-13 16:28 ` Rob Clark
2020-08-10 22:26 ` [PATCH v12 05/13] iommu/arm-smmu-qcom: Add implementation for the adreno GPU SMMU Jordan Crouse
2020-08-13 13:23 ` Will Deacon
2020-08-10 22:26 ` [PATCH v12 06/13] dt-bindings: arm-smmu: Add compatible string for Adreno " Jordan Crouse
2020-08-10 22:26 ` [PATCH v12 07/13] drm/msm: Add a context pointer to the submitqueue Jordan Crouse
2020-08-13 16:17 ` [Freedreno] " Rob Clark
2020-08-13 17:04 ` Rob Clark
2020-08-10 22:26 ` [PATCH v12 08/13] drm/msm: Set the global virtual address range from the IOMMU domain Jordan Crouse
2020-08-10 22:26 ` [PATCH v12 09/13] drm/msm: Add support to create a local pagetable Jordan Crouse
2020-08-23 23:05 ` Guenter Roeck
2020-08-10 22:26 ` [PATCH v12 10/13] drm/msm: Add support for private address space instances Jordan Crouse
2020-08-10 22:26 ` [PATCH v12 11/13] drm/msm/a6xx: Add support for per-instance pagetables Jordan Crouse
2020-08-10 22:26 ` [PATCH v12 12/13] arm: dts: qcom: sm845: Set the compatible string for the GPU SMMU Jordan Crouse
2020-08-10 22:26 ` [RFC v12 13/13] iommu/arm-smmu: Add a init_context_bank implementation hook Jordan Crouse
2020-08-13 13:03 ` Will Deacon
2020-08-13 13:19 ` [PATCH v12 00/13] iommu/arm-smmu: Add Adreno SMMU specific implementation Will Deacon
2020-08-14 2:40 ` [PATCH 00/19] iommu/arm-smmu + drm/msm: per-process GPU pgtables Rob Clark
2020-08-17 16:51 ` Jordan Crouse
2020-08-14 2:40 ` [PATCH 01/19] drm/msm: remove dangling submitqueue references Rob Clark
2020-08-17 16:51 ` Jordan Crouse
2020-09-01 2:35 ` Bjorn Andersson
2020-09-01 3:42 ` Rob Clark
2020-09-01 5:42 ` Bjorn Andersson
2020-09-01 5:42 ` Bjorn Andersson
2020-08-14 2:40 ` [PATCH 02/19] iommu/arm-smmu: Pass io-pgtable config to implementation specific function Rob Clark
2020-09-01 3:36 ` Bjorn Andersson
2020-08-14 2:40 ` [PATCH 03/19] iommu/arm-smmu: Add support for split pagetables Rob Clark
2020-09-01 3:41 ` Bjorn Andersson
2020-08-14 2:40 ` [PATCH 04/19] iommu/arm-smmu: Prepare for the adreno-smmu implementation Rob Clark
2020-08-14 2:41 ` [PATCH 05/19] iommu: add private interface for adreno-smmu Rob Clark
2020-08-17 16:52 ` Jordan Crouse [this message]
2020-09-01 3:52 ` Bjorn Andersson
2020-08-14 2:41 ` [PATCH 06/19] drm/msm/gpu: add dev_to_gpu() helper Rob Clark
2020-08-17 16:53 ` [Freedreno] " Jordan Crouse
2020-09-01 4:32 ` Bjorn Andersson
2020-09-01 15:53 ` Rob Clark
2020-08-14 2:41 ` [PATCH 07/19] drm/msm: set adreno_smmu as gpu's drvdata Rob Clark
2020-08-17 16:55 ` Jordan Crouse
2020-09-01 4:58 ` Bjorn Andersson
2020-08-14 2:41 ` [PATCH 08/19] iommu/arm-smmu: constify some helpers Rob Clark
2020-09-01 4:56 ` Bjorn Andersson
2020-08-14 2:41 ` [PATCH 09/19] iommu/arm-smmu-qcom: Add implementation for the adreno GPU SMMU Rob Clark
2020-09-01 5:00 ` Bjorn Andersson
2020-08-14 2:41 ` [PATCH 10/19] dt-bindings: arm-smmu: Add compatible string for Adreno " Rob Clark
2020-09-01 5:00 ` Bjorn Andersson
2020-08-14 2:41 ` [PATCH 11/19] drm/msm: Add a context pointer to the submitqueue Rob Clark
2020-09-01 5:05 ` Bjorn Andersson
2020-08-14 2:41 ` [PATCH 12/19] drm/msm: Drop context arg to gpu->submit() Rob Clark
2020-09-01 5:06 ` Bjorn Andersson
2020-08-14 2:41 ` [PATCH 13/19] drm/msm: Set the global virtual address range from the IOMMU domain Rob Clark
2020-09-01 5:23 ` Bjorn Andersson
2020-08-14 2:41 ` [PATCH 14/19] drm/msm: Add support to create a local pagetable Rob Clark
2020-09-01 5:28 ` Bjorn Andersson
2020-08-14 2:41 ` [PATCH 15/19] drm/msm: Add support for private address space instances Rob Clark
2020-09-01 5:30 ` Bjorn Andersson
2020-08-14 2:41 ` [PATCH 16/19] drm/msm/a6xx: Add support for per-instance pagetables Rob Clark
2020-08-17 15:40 ` Akhil P Oommen
2020-08-17 15:51 ` Rob Clark
2020-08-17 16:47 ` Jordan Crouse
2020-08-14 2:41 ` [PATCH 17/19] arm: dts: qcom: sm845: Set the compatible string for the GPU SMMU Rob Clark
2020-08-14 2:41 ` [PATCH 18/19] iommu/arm-smmu: add a way for implementations to influence SCTLR Rob Clark
2020-09-01 5:31 ` Bjorn Andersson
2020-08-14 2:41 ` [PATCH 19/19] drm/msm: show process names in gem_describe Rob Clark
2020-08-17 17:14 ` [Freedreno] " Jordan Crouse
2020-09-01 5:35 ` Bjorn Andersson
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