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Message-ID: <63997e6a-27a1-3ac3-f7a0-039911ba1cf8@amd.com>
Date: Thu, 17 Aug 2023 13:21:52 +0530
From: "Yadav, Arvind" <arvyadav@....com>
To: Alex Deucher <alexdeucher@...il.com>,
Arvind Yadav <Arvind.Yadav@....com>
Cc: Christian.Koenig@....com, alexander.deucher@....com,
shashank.sharma@....com, Xinhui.Pan@....com, airlied@...il.com,
daniel@...ll.ch, amd-gfx@...ts.freedesktop.org,
dri-devel@...ts.freedesktop.org, linux-kernel@...r.kernel.org
Subject: Re: [PATCH 1/3] drm/amdgpu: Add new api to switch on/off power
profile mode
On 8/14/2023 8:03 PM, Alex Deucher wrote:
> On Mon, Aug 14, 2023 at 3:35 AM Arvind Yadav <Arvind.Yadav@....com> wrote:
>> This patch adds a function which will allow to
>> change the GPU power profile based on a submitted job.
>> This can optimize the power performance when the
>> workload is on.
> A few minor comments inline below. One thing to double check is that
> we properly cancel this work before a suspend or driver unload. We
> need to make sure this is taken care of before we take down the SMU.
>
> Alex
Noted,
>> Cc: Shashank Sharma <shashank.sharma@....com>
>> Cc: Christian Koenig <christian.koenig@....com>
>> Cc: Alex Deucher <alexander.deucher@....com>
>> Signed-off-by: Arvind Yadav <Arvind.Yadav@....com>
>> ---
>> drivers/gpu/drm/amd/amdgpu/Makefile | 2 +-
>> drivers/gpu/drm/amd/amdgpu/amdgpu.h | 3 +
>> drivers/gpu/drm/amd/amdgpu/amdgpu_device.c | 2 +
>> drivers/gpu/drm/amd/amdgpu/amdgpu_workload.c | 156 ++++++++++++++++++
>> drivers/gpu/drm/amd/include/amdgpu_workload.h | 44 +++++
>> 5 files changed, 206 insertions(+), 1 deletion(-)
>> create mode 100644 drivers/gpu/drm/amd/amdgpu/amdgpu_workload.c
>> create mode 100644 drivers/gpu/drm/amd/include/amdgpu_workload.h
>>
>> diff --git a/drivers/gpu/drm/amd/amdgpu/Makefile b/drivers/gpu/drm/amd/amdgpu/Makefile
>> index 415a7fa395c4..6a9e187d61e1 100644
>> --- a/drivers/gpu/drm/amd/amdgpu/Makefile
>> +++ b/drivers/gpu/drm/amd/amdgpu/Makefile
>> @@ -60,7 +60,7 @@ amdgpu-y += amdgpu_device.o amdgpu_kms.o \
>> amdgpu_umc.o smu_v11_0_i2c.o amdgpu_fru_eeprom.o amdgpu_rap.o \
>> amdgpu_fw_attestation.o amdgpu_securedisplay.o \
>> amdgpu_eeprom.o amdgpu_mca.o amdgpu_psp_ta.o amdgpu_lsdma.o \
>> - amdgpu_ring_mux.o
>> + amdgpu_ring_mux.o amdgpu_workload.o
>>
>> amdgpu-$(CONFIG_PROC_FS) += amdgpu_fdinfo.o
>>
>> diff --git a/drivers/gpu/drm/amd/amdgpu/amdgpu.h b/drivers/gpu/drm/amd/amdgpu/amdgpu.h
>> index 02b827785e39..1939fa1af8a6 100644
>> --- a/drivers/gpu/drm/amd/amdgpu/amdgpu.h
>> +++ b/drivers/gpu/drm/amd/amdgpu/amdgpu.h
>> @@ -107,6 +107,7 @@
>> #include "amdgpu_fdinfo.h"
>> #include "amdgpu_mca.h"
>> #include "amdgpu_ras.h"
>> +#include "amdgpu_workload.h"
>>
>> #define MAX_GPU_INSTANCE 16
>>
>> @@ -1050,6 +1051,8 @@ struct amdgpu_device {
>>
>> bool job_hang;
>> bool dc_enabled;
>> +
>> + struct amdgpu_smu_workload smu_workload;
>> };
>>
>> static inline struct amdgpu_device *drm_to_adev(struct drm_device *ddev)
>> diff --git a/drivers/gpu/drm/amd/amdgpu/amdgpu_device.c b/drivers/gpu/drm/amd/amdgpu/amdgpu_device.c
>> index 5c7d40873ee2..0ec18b8fe29f 100644
>> --- a/drivers/gpu/drm/amd/amdgpu/amdgpu_device.c
>> +++ b/drivers/gpu/drm/amd/amdgpu/amdgpu_device.c
>> @@ -3672,6 +3672,8 @@ int amdgpu_device_init(struct amdgpu_device *adev,
>>
>> INIT_WORK(&adev->xgmi_reset_work, amdgpu_device_xgmi_reset_func);
>>
>> + amdgpu_smu_workload_init(adev);
>> +
>> adev->gfx.gfx_off_req_count = 1;
>> adev->gfx.gfx_off_residency = 0;
>> adev->gfx.gfx_off_entrycount = 0;
>> diff --git a/drivers/gpu/drm/amd/amdgpu/amdgpu_workload.c b/drivers/gpu/drm/amd/amdgpu/amdgpu_workload.c
>> new file mode 100644
>> index 000000000000..ce0339d75c12
>> --- /dev/null
>> +++ b/drivers/gpu/drm/amd/amdgpu/amdgpu_workload.c
>> @@ -0,0 +1,156 @@
>> +// SPDX-License-Identifier: MIT
>> +/*
>> + * Copyright 2023 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 "amdgpu.h"
>> +
>> +/* 100 millsecond timeout */
>> +#define SMU_IDLE_TIMEOUT msecs_to_jiffies(100)
>> +
>> +static enum PP_SMC_POWER_PROFILE
>> +ring_to_power_profile(uint32_t ring_type)
>> +{
>> + switch (ring_type) {
>> + case AMDGPU_RING_TYPE_GFX:
>> + return PP_SMC_POWER_PROFILE_FULLSCREEN3D;
>> + case AMDGPU_RING_TYPE_COMPUTE:
>> + return PP_SMC_POWER_PROFILE_COMPUTE;
>> + case AMDGPU_RING_TYPE_UVD:
>> + case AMDGPU_RING_TYPE_VCE:
>> + case AMDGPU_RING_TYPE_UVD_ENC:
>> + case AMDGPU_RING_TYPE_VCN_DEC:
>> + case AMDGPU_RING_TYPE_VCN_ENC:
>> + case AMDGPU_RING_TYPE_VCN_JPEG:
>> + return PP_SMC_POWER_PROFILE_VIDEO;
>> + default:
>> + return PP_SMC_POWER_PROFILE_BOOTUP_DEFAULT;
>> + }
>> +}
>> +
>> +static void
>> +amdgpu_power_profile_set(struct amdgpu_device *adev,
>> + enum PP_SMC_POWER_PROFILE profile)
>> +{
>> + int ret = amdgpu_dpm_switch_power_profile(adev, profile, true);
>> +
>> + if (ret == 0) {
>> + /* Set the bit for the submitted workload profile */
>> + adev->smu_workload.submit_workload_status |= (1 << profile);
>> + atomic_inc(&adev->smu_workload.power_profile_ref[profile]);
>> + } else {
>> + DRM_ERROR("Failed to set power profile, error %d\n", ret);
>> + }
>> +
>> +}
>> +
>> +static void
>> +amdgpu_power_profile_clear(struct amdgpu_device *adev,
>> + enum PP_SMC_POWER_PROFILE profile)
>> +{
>> + int ret = amdgpu_dpm_switch_power_profile(adev, profile, false);
>> +
>> + if (ret == 0) {
>> + /* Clear the bit for the submitted workload profile */
>> + adev->smu_workload.submit_workload_status &= ~(1 << profile);
>> + } else
>> + DRM_ERROR("Failed to clear power profile, error %d\n", ret);
>> +
>> +}
>> +
>> +static void amdgpu_smu_idle_work_handler(struct work_struct *work)
> How about amdgpu_power_profile_idle_work_handler() for consistency?
>
>> +{
>> +
>> + struct amdgpu_smu_workload *wl = container_of(work,
>> + struct amdgpu_smu_workload,
>> + smu_delayed_work.work);
>> + struct amdgpu_device *adev = wl->adev;
>> + bool reschedule = false;
>> +
>> + mutex_lock(&adev->smu_workload.workload_lock);
>> + for (int index = fls(adev->smu_workload.submit_workload_status);
>> + index >= 0; index--) {
>> + if (!atomic_read(&adev->smu_workload.power_profile_ref[index]) &&
>> + adev->smu_workload.submit_workload_status & (1 << index)) {
>> + amdgpu_power_profile_clear(adev, index);
>> + } else if (atomic_read(&adev->smu_workload.power_profile_ref[index]))
>> + reschedule = true;
>> + }
>> +
>> + if (reschedule)
>> + schedule_delayed_work(&adev->smu_workload.smu_delayed_work,
>> + SMU_IDLE_TIMEOUT);
>> +
>> + mutex_unlock(&adev->smu_workload.workload_lock);
>> +}
>> +
>> +void amdgpu_put_workload_profile(struct amdgpu_device *adev,
> amdgpu_workload_profile_put() for consistency.
>
>> + uint32_t ring_type)
>> +{
>> +
>> + enum PP_SMC_POWER_PROFILE profile = ring_to_power_profile(ring_type);
>> +
>> + if (profile == PP_SMC_POWER_PROFILE_BOOTUP_DEFAULT)
>> + return;
>> +
>> + mutex_lock(&adev->smu_workload.workload_lock);
>> + atomic_dec(&adev->smu_workload.power_profile_ref[profile]);
>> + schedule_delayed_work(&adev->smu_workload.smu_delayed_work, SMU_IDLE_TIMEOUT);
>> + mutex_unlock(&adev->smu_workload.workload_lock);
>> +}
>> +
>> +void amdgpu_set_workload_profile(struct amdgpu_device *adev,
>> + uint32_t ring_type)
> amdgpu_workload_profile_set() for consistency.
Noted, I will change the function name.
>> +{
>> + enum PP_SMC_POWER_PROFILE profile = ring_to_power_profile(ring_type);
>> +
>> + if (profile == PP_SMC_POWER_PROFILE_BOOTUP_DEFAULT)
>> + return;
>> +
>> + mutex_lock(&adev->smu_workload.workload_lock);
>> + cancel_delayed_work_sync(&adev->smu_workload.smu_delayed_work);
>> +
>> + amdgpu_power_profile_set(adev, profile);
>> +
>> + /* Clear the already finished jobs of higher power profile*/
>> + for (int index = fls(adev->smu_workload.submit_workload_status);
>> + index > profile; index--) {
>> + if (!atomic_read(&adev->smu_workload.power_profile_ref[index]) &&
>> + adev->smu_workload.submit_workload_status & (1 << index)) {
>> + amdgpu_power_profile_clear(adev, index);
>> + }
>> + }
>> +
>> + mutex_unlock(&adev->smu_workload.workload_lock);
>> +}
>> +
>> +void amdgpu_smu_workload_init(struct amdgpu_device *adev)
> amdgpu_workload_profile_init() for consistency.
Noted,
~Arvind
>> +{
>> + struct amdgpu_smu_workload wl;
>> +
>> + wl.adev = adev;
>> + wl.submit_workload_status = 0;
>> + adev->smu_workload = wl;
>> +
>> + mutex_init(&adev->smu_workload.workload_lock);
>> + INIT_DELAYED_WORK(&adev->smu_workload.smu_delayed_work, amdgpu_smu_idle_work_handler);
>> +}
>> diff --git a/drivers/gpu/drm/amd/include/amdgpu_workload.h b/drivers/gpu/drm/amd/include/amdgpu_workload.h
>> new file mode 100644
>> index 000000000000..09804c3d2869
>> --- /dev/null
>> +++ b/drivers/gpu/drm/amd/include/amdgpu_workload.h
>> @@ -0,0 +1,44 @@
>> +/* SPDX-License-Identifier: MIT */
>> +/*
>> + * Copyright 2023 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_WORKLOAD_H_
>> +#define _AMDGPU_WORKLOAD_H_
>> +
>> +struct amdgpu_smu_workload {
>> + struct amdgpu_device *adev;
>> + struct mutex workload_lock;
>> + struct delayed_work smu_delayed_work;
>> + uint32_t submit_workload_status;
>> + atomic_t power_profile_ref[PP_SMC_POWER_PROFILE_COUNT];
>> +};
>> +
>> +void amdgpu_set_workload_profile(struct amdgpu_device *adev,
>> + uint32_t ring_type);
>> +
>> +void amdgpu_put_workload_profile(struct amdgpu_device *adev,
>> + uint32_t ring_type);
>> +
>> +void amdgpu_smu_workload_init(struct amdgpu_device *adev);
>> +
>> +#endif
>> --
>> 2.34.1
>>
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