[PATCH] drm/amdgpu: implement TMZ accessor (v2)
Alex Deucher
alexdeucher at gmail.com
Wed Nov 27 20:37:20 UTC 2019
On Tue, Nov 26, 2019 at 9:03 PM Luben Tuikov <luben.tuikov at amd.com> wrote:
>
> Implement an accessor of adev->tmz.enabled. Let not
> code around access it as "if (adev->tmz.enabled)"
> as the organization may change. Instead...
>
> Recruit "bool amdgpu_is_tmz(adev)" to return
> exactly this Boolean value. That is, this function
> is now an accessor of an already initialized and
> set adev and adev->tmz.
>
> Add "void amdgpu_tmz_set(adev)" to check and set
> adev->tmz.* at initialization time. After which
> one uses "bool amdgpu_is_tmz(adev)" to query
> whether adev supports TMZ.
>
> Also, remove circular header file include.
>
> v2: Remove amdgpu_tmz.[ch] as requested.
>
> Signed-off-by: Luben Tuikov <luben.tuikov at amd.com>
> Acked-by: Christian König <christian.koenig at amd.com>
> ---
> drivers/gpu/drm/amd/amdgpu/Makefile | 2 +-
> drivers/gpu/drm/amd/amdgpu/amdgpu.h | 6 ++-
> drivers/gpu/drm/amd/amdgpu/amdgpu_device.c | 3 +-
> drivers/gpu/drm/amd/amdgpu/amdgpu_gmc.c | 23 ++++++++++
> drivers/gpu/drm/amd/amdgpu/amdgpu_gmc.h | 9 ++++
> drivers/gpu/drm/amd/amdgpu/amdgpu_tmz.c | 52 ----------------------
> drivers/gpu/drm/amd/amdgpu/amdgpu_tmz.h | 39 ----------------
> 7 files changed, 39 insertions(+), 95 deletions(-)
> delete mode 100644 drivers/gpu/drm/amd/amdgpu/amdgpu_tmz.c
> delete mode 100644 drivers/gpu/drm/amd/amdgpu/amdgpu_tmz.h
>
> diff --git a/drivers/gpu/drm/amd/amdgpu/Makefile b/drivers/gpu/drm/amd/amdgpu/Makefile
> index 83ee1c676e3a..7ae3b22c5628 100644
> --- a/drivers/gpu/drm/amd/amdgpu/Makefile
> +++ b/drivers/gpu/drm/amd/amdgpu/Makefile
> @@ -55,7 +55,7 @@ amdgpu-y += amdgpu_device.o amdgpu_kms.o \
> amdgpu_vf_error.o amdgpu_sched.o amdgpu_debugfs.o amdgpu_ids.o \
> amdgpu_gmc.o amdgpu_mmhub.o amdgpu_xgmi.o amdgpu_csa.o amdgpu_ras.o amdgpu_vm_cpu.o \
> amdgpu_vm_sdma.o amdgpu_discovery.o amdgpu_ras_eeprom.o amdgpu_nbio.o \
> - amdgpu_umc.o smu_v11_0_i2c.o amdgpu_tmz.o
> + amdgpu_umc.o smu_v11_0_i2c.o
>
> amdgpu-$(CONFIG_PERF_EVENTS) += amdgpu_pmu.o
>
> diff --git a/drivers/gpu/drm/amd/amdgpu/amdgpu.h b/drivers/gpu/drm/amd/amdgpu/amdgpu.h
> index d120fe58ebea..805e12ef13ea 100644
> --- a/drivers/gpu/drm/amd/amdgpu/amdgpu.h
> +++ b/drivers/gpu/drm/amd/amdgpu/amdgpu.h
> @@ -90,7 +90,6 @@
> #include "amdgpu_mes.h"
> #include "amdgpu_umc.h"
> #include "amdgpu_mmhub.h"
> -#include "amdgpu_tmz.h"
>
> #define MAX_GPU_INSTANCE 16
>
> @@ -1266,5 +1265,10 @@ _name##_show(struct device *dev, \
> \
> static struct device_attribute pmu_attr_##_name = __ATTR_RO(_name)
>
> +static inline bool amdgpu_is_tmz(struct amdgpu_device *adev)
> +{
> + return adev->tmz.enabled;
> +}
> +
> #endif
>
> diff --git a/drivers/gpu/drm/amd/amdgpu/amdgpu_device.c b/drivers/gpu/drm/amd/amdgpu/amdgpu_device.c
> index b1408c5e4640..56836054e6a8 100644
> --- a/drivers/gpu/drm/amd/amdgpu/amdgpu_device.c
> +++ b/drivers/gpu/drm/amd/amdgpu/amdgpu_device.c
> @@ -64,7 +64,6 @@
> #include "amdgpu_xgmi.h"
> #include "amdgpu_ras.h"
> #include "amdgpu_pmu.h"
> -#include "amdgpu_tmz.h"
>
> #include <linux/suspend.h>
>
> @@ -1073,7 +1072,7 @@ static int amdgpu_device_check_arguments(struct amdgpu_device *adev)
>
> adev->firmware.load_type = amdgpu_ucode_get_load_type(adev, amdgpu_fw_load_type);
>
> - adev->tmz.enabled = amdgpu_is_tmz(adev);
> + amdgpu_tmz_set(adev);
>
> return ret;
> }
> diff --git a/drivers/gpu/drm/amd/amdgpu/amdgpu_gmc.c b/drivers/gpu/drm/amd/amdgpu/amdgpu_gmc.c
> index a12f33c0f5df..a0245d8b2f37 100644
> --- a/drivers/gpu/drm/amd/amdgpu/amdgpu_gmc.c
> +++ b/drivers/gpu/drm/amd/amdgpu/amdgpu_gmc.c
> @@ -333,3 +333,26 @@ void amdgpu_gmc_ras_fini(struct amdgpu_device *adev)
> amdgpu_mmhub_ras_fini(adev);
> amdgpu_xgmi_ras_fini(adev);
> }
> +
> +/**
> + * amdgpu_tmz_set -- check and set if a device supports TMZ
> + * @adev: amdgpu_device pointer
> + *
> + * Check and set if an the device @adev supports Trusted Memory
> + * Zones (TMZ).
> + */
> +void amdgpu_tmz_set(struct amdgpu_device *adev)
I would prefer to call this amdgpu_gmc_tmz_set() to keep the naming in
this file consistent. That way it's easy to see figure out where this
function is defined.
> +{
> + if (!amdgpu_tmz)
> + return;
> +
> + if (adev->asic_type < CHIP_RAVEN ||
> + adev->asic_type == CHIP_ARCTURUS) {
> + dev_warn(adev->dev, "Trusted Memory Zone (TMZ) feature not supported\n");
> + return;
> + }
> +
> + adev->tmz.enabled = true;
> +
> + dev_info(adev->dev, "Trusted Memory Zone (TMZ) feature supported and enabled\n");
> +}
> diff --git a/drivers/gpu/drm/amd/amdgpu/amdgpu_gmc.h b/drivers/gpu/drm/amd/amdgpu/amdgpu_gmc.h
> index 406736a1bd3d..1abd935a073e 100644
> --- a/drivers/gpu/drm/amd/amdgpu/amdgpu_gmc.h
> +++ b/drivers/gpu/drm/amd/amdgpu/amdgpu_gmc.h
> @@ -267,4 +267,13 @@ bool amdgpu_gmc_filter_faults(struct amdgpu_device *adev, uint64_t addr,
> int amdgpu_gmc_ras_late_init(struct amdgpu_device *adev);
> void amdgpu_gmc_ras_fini(struct amdgpu_device *adev);
>
> +/*
> + * Trusted Memory Zone particulars
> + */
> +struct amdgpu_tmz {
> + bool enabled;
> +};
Also any reason to not put this in struct amdgpu_gmc? Then we can
just expose it as adev->gmc.tmz_enabled.
Alex
> +
> +extern void amdgpu_tmz_set(struct amdgpu_device *adev);
> +
> #endif
> diff --git a/drivers/gpu/drm/amd/amdgpu/amdgpu_tmz.c b/drivers/gpu/drm/amd/amdgpu/amdgpu_tmz.c
> deleted file mode 100644
> index 823527a0fa47..000000000000
> --- a/drivers/gpu/drm/amd/amdgpu/amdgpu_tmz.c
> +++ /dev/null
> @@ -1,52 +0,0 @@
> -/*
> - * Copyright 2019 Advanced Micro Devices, Inc.
> - *
> - * Permission is hereby granted, free of charge, to any person obtaining a
> - * copy of this software and associated documentation files (the "Software"),
> - * to deal in the Software without restriction, including without limitation
> - * the rights to use, copy, modify, merge, publish, distribute, sublicense,
> - * and/or sell copies of the Software, and to permit persons to whom the
> - * Software is furnished to do so, subject to the following conditions:
> - *
> - * The above copyright notice and this permission notice shall be included in
> - * all copies or substantial portions of the Software.
> - *
> - * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
> - * IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
> - * FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL
> - * THE COPYRIGHT HOLDER(S) OR AUTHOR(S) BE LIABLE FOR ANY CLAIM, DAMAGES OR
> - * OTHER LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE,
> - * ARISING FROM, OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR
> - * OTHER DEALINGS IN THE SOFTWARE.
> - */
> -
> -#include <linux/device.h>
> -
> -#include <drm/amd_asic_type.h>
> -
> -#include "amdgpu.h"
> -#include "amdgpu_tmz.h"
> -
> -
> -/**
> - * amdgpu_is_tmz - validate trust memory zone
> - *
> - * @adev: amdgpu_device pointer
> - *
> - * Return true if @dev supports trusted memory zones (TMZ), and return false if
> - * @dev does not support TMZ.
> - */
> -bool amdgpu_is_tmz(struct amdgpu_device *adev)
> -{
> - if (!amdgpu_tmz)
> - return false;
> -
> - if (adev->asic_type < CHIP_RAVEN || adev->asic_type == CHIP_ARCTURUS) {
> - dev_warn(adev->dev, "doesn't support trusted memory zones (TMZ)\n");
> - return false;
> - }
> -
> - dev_info(adev->dev, "TMZ feature is enabled\n");
> -
> - return true;
> -}
> diff --git a/drivers/gpu/drm/amd/amdgpu/amdgpu_tmz.h b/drivers/gpu/drm/amd/amdgpu/amdgpu_tmz.h
> deleted file mode 100644
> index 28e05177fb89..000000000000
> --- a/drivers/gpu/drm/amd/amdgpu/amdgpu_tmz.h
> +++ /dev/null
> @@ -1,39 +0,0 @@
> -/*
> - * Copyright 2019 Advanced Micro Devices, Inc.
> - *
> - * Permission is hereby granted, free of charge, to any person obtaining a
> - * copy of this software and associated documentation files (the "Software"),
> - * to deal in the Software without restriction, including without limitation
> - * the rights to use, copy, modify, merge, publish, distribute, sublicense,
> - * and/or sell copies of the Software, and to permit persons to whom the
> - * Software is furnished to do so, subject to the following conditions:
> - *
> - * The above copyright notice and this permission notice shall be included in
> - * all copies or substantial portions of the Software.
> - *
> - * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
> - * IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
> - * FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL
> - * THE COPYRIGHT HOLDER(S) OR AUTHOR(S) BE LIABLE FOR ANY CLAIM, DAMAGES OR
> - * OTHER LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE,
> - * ARISING FROM, OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR
> - * OTHER DEALINGS IN THE SOFTWARE.
> - *
> - */
> -
> -#ifndef __AMDGPU_TMZ_H__
> -#define __AMDGPU_TMZ_H__
> -
> -#include "amdgpu.h"
> -
> -/*
> - * Trust memory zone stuff
> - */
> -struct amdgpu_tmz {
> - bool enabled;
> -};
> -
> -
> -extern bool amdgpu_is_tmz(struct amdgpu_device *adev);
> -
> -#endif
> --
> 2.24.0.155.gd9f6f3b619
>
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