[RFC PATCH 1/2] drm/amdgpu/UAPI: add new PROFILE IOCTL
Alex Deucher
alexdeucher at gmail.com
Tue Dec 14 14:53:39 UTC 2021
On Sun, Dec 5, 2021 at 4:23 AM Christian König
<ckoenig.leichtzumerken at gmail.com> wrote:
>
> Am 03.12.21 um 17:13 schrieb Alex Deucher:
> > On Fri, Dec 3, 2021 at 7:15 AM Christian König
> > <ckoenig.leichtzumerken at gmail.com> wrote:
> >> Am 02.12.21 um 20:19 schrieb Alex Deucher:
> >>> This adds a new IOCTL currently used to implement querying
> >>> and setting the stable power state for GPU profiling. The
> >>> stable pstates use fixed clocks and disable certain power
> >>> features in order to get accurate pipeline profiling.
> >>>
> >>> Currently this is handled via sysfs, and that is still
> >>> available, but this makes it easier for applications
> >>> to utilize. Note that the power state is global so
> >>> setting it will affect all applications. There are currently
> >>> no checks in place to prevent multiple applications from
> >>> using this interface, but it doesn't make sense to do
> >>> profiling while you have multiple applications running in the
> >>> first place, so it's up to the user to ensure this in order
> >>> to get good results.
> >>>
> >>> This patch add an interface to query what profiling mode is
> >>> currently active and to set enable a profiling mode.
> >> First of all I wouldn't call this profiling mode. Profiling is the use
> >> case, but performance and power management are what is controlled here.
> >>
> > Ok.
> >
> >> Then we already have functionality for process and context priority
> >> override for the SW scheduler in amdgpu_sched.c. I think we should add
> >> this functionality there.
> > I'm not sure I follow. Do you mean to integrate this with the
> > rendering context? That was what my original patch did (attached).
> > Or were you thinking it would be better to make this part of the sched
> > ioctl?
>
> The later,
>
> The scheduler IOCTLs are all about adjusting the default priority of a
> process (and optionally a context as well).
>
> Putting the hardware power management control alongside that kind of
> makes sense I think.
>
> Something like AMDGPU_SCHED_OP_POWER.
The problem is that the sched ioctl is currently DRM_MASTER only.
That kind of defeats the purpose of putting this in a user ioctl in
the first place.
Alex
>
> Christian.
>
> >
> > Alex
> >
> >
> >> Christian.
> >>
> >>> Signed-off-by: Alex Deucher <alexander.deucher at amd.com>
> >>> ---
> >>> drivers/gpu/drm/amd/amdgpu/Makefile | 2 +-
> >>> drivers/gpu/drm/amd/amdgpu/amdgpu_drv.c | 2 +
> >>> drivers/gpu/drm/amd/amdgpu/amdgpu_profile.c | 112 ++++++++++++++++++++
> >>> drivers/gpu/drm/amd/amdgpu/amdgpu_profile.h | 30 ++++++
> >>> include/uapi/drm/amdgpu_drm.h | 28 +++++
> >>> 5 files changed, 173 insertions(+), 1 deletion(-)
> >>> create mode 100644 drivers/gpu/drm/amd/amdgpu/amdgpu_profile.c
> >>> create mode 100644 drivers/gpu/drm/amd/amdgpu/amdgpu_profile.h
> >>>
> >>> diff --git a/drivers/gpu/drm/amd/amdgpu/Makefile b/drivers/gpu/drm/amd/amdgpu/Makefile
> >>> index 7fedbb725e17..4cf5bf637a9e 100644
> >>> --- a/drivers/gpu/drm/amd/amdgpu/Makefile
> >>> +++ b/drivers/gpu/drm/amd/amdgpu/Makefile
> >>> @@ -58,7 +58,7 @@ amdgpu-y += amdgpu_device.o amdgpu_kms.o \
> >>> amdgpu_vm_sdma.o amdgpu_discovery.o amdgpu_ras_eeprom.o amdgpu_nbio.o \
> >>> amdgpu_umc.o smu_v11_0_i2c.o amdgpu_fru_eeprom.o amdgpu_rap.o \
> >>> amdgpu_fw_attestation.o amdgpu_securedisplay.o amdgpu_hdp.o \
> >>> - amdgpu_eeprom.o amdgpu_mca.o
> >>> + amdgpu_eeprom.o amdgpu_mca.o amdgpu_profile.o
> >>>
> >>> amdgpu-$(CONFIG_PROC_FS) += amdgpu_fdinfo.o
> >>>
> >>> diff --git a/drivers/gpu/drm/amd/amdgpu/amdgpu_drv.c b/drivers/gpu/drm/amd/amdgpu/amdgpu_drv.c
> >>> index bc1355c6248d..0e27f9673f8f 100644
> >>> --- a/drivers/gpu/drm/amd/amdgpu/amdgpu_drv.c
> >>> +++ b/drivers/gpu/drm/amd/amdgpu/amdgpu_drv.c
> >>> @@ -46,6 +46,7 @@
> >>> #include "amdgpu_sched.h"
> >>> #include "amdgpu_fdinfo.h"
> >>> #include "amdgpu_amdkfd.h"
> >>> +#include "amdgpu_profile.h"
> >>>
> >>> #include "amdgpu_ras.h"
> >>> #include "amdgpu_xgmi.h"
> >>> @@ -2467,6 +2468,7 @@ const struct drm_ioctl_desc amdgpu_ioctls_kms[] = {
> >>> DRM_IOCTL_DEF_DRV(AMDGPU_GEM_VA, amdgpu_gem_va_ioctl, DRM_AUTH|DRM_RENDER_ALLOW),
> >>> DRM_IOCTL_DEF_DRV(AMDGPU_GEM_OP, amdgpu_gem_op_ioctl, DRM_AUTH|DRM_RENDER_ALLOW),
> >>> DRM_IOCTL_DEF_DRV(AMDGPU_GEM_USERPTR, amdgpu_gem_userptr_ioctl, DRM_AUTH|DRM_RENDER_ALLOW),
> >>> + DRM_IOCTL_DEF_DRV(AMDGPU_PROFILE, amdgpu_profile_ioctl, DRM_AUTH|DRM_RENDER_ALLOW),
> >>> };
> >>>
> >>> static const struct drm_driver amdgpu_kms_driver = {
> >>> diff --git a/drivers/gpu/drm/amd/amdgpu/amdgpu_profile.c b/drivers/gpu/drm/amd/amdgpu/amdgpu_profile.c
> >>> new file mode 100644
> >>> index 000000000000..94fe408e810f
> >>> --- /dev/null
> >>> +++ b/drivers/gpu/drm/amd/amdgpu/amdgpu_profile.c
> >>> @@ -0,0 +1,112 @@
> >>> +/*
> >>> + * Copyright 2021 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 <drm/amdgpu_drm.h>
> >>> +#include "amdgpu.h"
> >>> +
> >>> +/**
> >>> + * amdgpu_profile_ioctl - Manages settings for profiling.
> >>> + *
> >>> + * @dev: drm device pointer
> >>> + * @data: drm_amdgpu_vm
> >>> + * @filp: drm file pointer
> >>> + *
> >>> + * Returns:
> >>> + * 0 for success, -errno for errors.
> >>> + */
> >>> +int amdgpu_profile_ioctl(struct drm_device *dev, void *data,
> >>> + struct drm_file *filp)
> >>> +{
> >>> + union drm_amdgpu_profile *args = data;
> >>> + struct amdgpu_device *adev = drm_to_adev(dev);
> >>> + const struct amd_pm_funcs *pp_funcs = adev->powerplay.pp_funcs;
> >>> + enum amd_dpm_forced_level current_level, requested_level;
> >>> + int r;
> >>> +
> >>> + if (pp_funcs->get_performance_level)
> >>> + current_level = amdgpu_dpm_get_performance_level(adev);
> >>> + else
> >>> + current_level = adev->pm.dpm.forced_level;
> >>> +
> >>> + switch (args->in.op) {
> >>> + case AMDGPU_PROFILE_OP_GET_STABLE_PSTATE:
> >>> + if (args->in.flags)
> >>> + return -EINVAL;
> >>> + switch (current_level) {
> >>> + case AMD_DPM_FORCED_LEVEL_PROFILE_STANDARD:
> >>> + args->out.flags = AMDGPU_PROFILE_FLAGS_STABLE_PSTATE_STANDARD;
> >>> + break;
> >>> + case AMD_DPM_FORCED_LEVEL_PROFILE_MIN_SCLK:
> >>> + args->out.flags = AMDGPU_PROFILE_FLAGS_STABLE_PSTATE_MIN_SCLK;
> >>> + break;
> >>> + case AMD_DPM_FORCED_LEVEL_PROFILE_MIN_MCLK:
> >>> + args->out.flags = AMDGPU_PROFILE_FLAGS_STABLE_PSTATE_MIN_MCLK;
> >>> + break;
> >>> + case AMD_DPM_FORCED_LEVEL_PROFILE_PEAK:
> >>> + args->out.flags = AMDGPU_PROFILE_FLAGS_STABLE_PSTATE_PEAK;
> >>> + break;
> >>> + default:
> >>> + args->out.flags = AMDGPU_PROFILE_FLAGS_STABLE_PSTATE_NONE;
> >>> + break;
> >>> + }
> >>> + break;
> >>> + case AMDGPU_PROFILE_OP_SET_STABLE_PSTATE:
> >>> + if (args->in.flags & ~AMDGPU_PROFILE_FLAGS_STABLE_PSTATE_MASK)
> >>> + return -EINVAL;
> >>> + switch (args->in.flags & AMDGPU_PROFILE_FLAGS_STABLE_PSTATE_MASK) {
> >>> + case AMDGPU_PROFILE_FLAGS_STABLE_PSTATE_STANDARD:
> >>> + requested_level = AMD_DPM_FORCED_LEVEL_PROFILE_STANDARD;
> >>> + break;
> >>> + case AMDGPU_PROFILE_FLAGS_STABLE_PSTATE_MIN_SCLK:
> >>> + requested_level = AMD_DPM_FORCED_LEVEL_PROFILE_MIN_SCLK;
> >>> + break;
> >>> + case AMDGPU_PROFILE_FLAGS_STABLE_PSTATE_MIN_MCLK:
> >>> + requested_level = AMD_DPM_FORCED_LEVEL_PROFILE_MIN_MCLK;
> >>> + break;
> >>> + case AMDGPU_PROFILE_FLAGS_STABLE_PSTATE_PEAK:
> >>> + requested_level = AMD_DPM_FORCED_LEVEL_PROFILE_PEAK;
> >>> + break;
> >>> + case AMDGPU_PROFILE_FLAGS_STABLE_PSTATE_NONE:
> >>> + requested_level = AMD_DPM_FORCED_LEVEL_AUTO;
> >>> + break;
> >>> + default:
> >>> + return -EINVAL;
> >>> + }
> >>> +
> >>> + if ((current_level != requested_level) && pp_funcs->force_performance_level) {
> >>> + mutex_lock(&adev->pm.mutex);
> >>> + r = amdgpu_dpm_force_performance_level(adev, requested_level);
> >>> + if (!r)
> >>> + adev->pm.dpm.forced_level = requested_level;
> >>> + mutex_unlock(&adev->pm.mutex);
> >>> + if (r)
> >>> + return r;
> >>> + }
> >>> + break;
> >>> + default:
> >>> + return -EINVAL;
> >>> + }
> >>> +
> >>> + return 0;
> >>> +}
> >>> +
> >>> diff --git a/drivers/gpu/drm/amd/amdgpu/amdgpu_profile.h b/drivers/gpu/drm/amd/amdgpu/amdgpu_profile.h
> >>> new file mode 100644
> >>> index 000000000000..cd1c597bae11
> >>> --- /dev/null
> >>> +++ b/drivers/gpu/drm/amd/amdgpu/amdgpu_profile.h
> >>> @@ -0,0 +1,30 @@
> >>> +/*
> >>> + * Copyright 2021 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_PROFILE_H__
> >>> +#define __AMDGPU_PROFILE_H__
> >>> +
> >>> +int amdgpu_profile_ioctl(struct drm_device *dev, void *data,
> >>> + struct drm_file *filp);
> >>> +
> >>> +#endif
> >>> diff --git a/include/uapi/drm/amdgpu_drm.h b/include/uapi/drm/amdgpu_drm.h
> >>> index 26e45fc5eb1a..b6edf4a826f9 100644
> >>> --- a/include/uapi/drm/amdgpu_drm.h
> >>> +++ b/include/uapi/drm/amdgpu_drm.h
> >>> @@ -54,6 +54,7 @@ extern "C" {
> >>> #define DRM_AMDGPU_VM 0x13
> >>> #define DRM_AMDGPU_FENCE_TO_HANDLE 0x14
> >>> #define DRM_AMDGPU_SCHED 0x15
> >>> +#define DRM_AMDGPU_PROFILE 0x16
> >>>
> >>> #define DRM_IOCTL_AMDGPU_GEM_CREATE DRM_IOWR(DRM_COMMAND_BASE + DRM_AMDGPU_GEM_CREATE, union drm_amdgpu_gem_create)
> >>> #define DRM_IOCTL_AMDGPU_GEM_MMAP DRM_IOWR(DRM_COMMAND_BASE + DRM_AMDGPU_GEM_MMAP, union drm_amdgpu_gem_mmap)
> >>> @@ -71,6 +72,7 @@ extern "C" {
> >>> #define DRM_IOCTL_AMDGPU_VM DRM_IOWR(DRM_COMMAND_BASE + DRM_AMDGPU_VM, union drm_amdgpu_vm)
> >>> #define DRM_IOCTL_AMDGPU_FENCE_TO_HANDLE DRM_IOWR(DRM_COMMAND_BASE + DRM_AMDGPU_FENCE_TO_HANDLE, union drm_amdgpu_fence_to_handle)
> >>> #define DRM_IOCTL_AMDGPU_SCHED DRM_IOW(DRM_COMMAND_BASE + DRM_AMDGPU_SCHED, union drm_amdgpu_sched)
> >>> +#define DRM_IOCTL_AMDGPU_PROFILE DRM_IOW(DRM_COMMAND_BASE + DRM_AMDGPU_PROFILE, union drm_amdgpu_profile)
> >>>
> >>> /**
> >>> * DOC: memory domains
> >>> @@ -1120,6 +1122,32 @@ struct drm_amdgpu_info_video_caps {
> >>> struct drm_amdgpu_info_video_codec_info codec_info[AMDGPU_INFO_VIDEO_CAPS_CODEC_IDX_COUNT];
> >>> };
> >>>
> >>> +/* profile ioctl */
> >>> +#define AMDGPU_PROFILE_OP_GET_STABLE_PSTATE 1
> >>> +#define AMDGPU_PROFILE_OP_SET_STABLE_PSTATE 2
> >>> +
> >>> +#define AMDGPU_PROFILE_FLAGS_STABLE_PSTATE_MASK 0xf
> >>> +#define AMDGPU_PROFILE_FLAGS_STABLE_PSTATE_NONE 0
> >>> +#define AMDGPU_PROFILE_FLAGS_STABLE_PSTATE_STANDARD 1
> >>> +#define AMDGPU_PROFILE_FLAGS_STABLE_PSTATE_MIN_SCLK 2
> >>> +#define AMDGPU_PROFILE_FLAGS_STABLE_PSTATE_MIN_MCLK 3
> >>> +#define AMDGPU_PROFILE_FLAGS_STABLE_PSTATE_PEAK 4
> >>> +
> >>> +struct drm_amdgpu_profile_in {
> >>> + /** AMDGPU_PROFILE_OP_* */
> >>> + __u32 op;
> >>> + __u32 flags;
> >>> +};
> >>> +
> >>> +struct drm_amdgpu_profile_out {
> >>> + __u64 flags;
> >>> +};
> >>> +
> >>> +union drm_amdgpu_profile {
> >>> + struct drm_amdgpu_profile_in in;
> >>> + struct drm_amdgpu_profile_out out;
> >>> +};
> >>> +
> >>> /*
> >>> * Supported GPU families
> >>> */
>
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