Re: [PATCH 1/3] drm/amdgpu: Add new api to switch on/off power profile mode

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On 8/14/2023 8:03 PM, Alex Deucher wrote:
On Mon, Aug 14, 2023 at 3:35 AM Arvind Yadav <Arvind.Yadav@xxxxxxx> 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@xxxxxxx>
Cc: Christian Koenig <christian.koenig@xxxxxxx>
Cc: Alex Deucher <alexander.deucher@xxxxxxx>
Signed-off-by: Arvind Yadav <Arvind.Yadav@xxxxxxx>
---
  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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