Re: [PATCH] drm/amdgpu: refactor code to reuse system information

From: Alex Deucher
Date: Tue Mar 19 2024 - 10:59:30 EST

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On Tue, Mar 19, 2024 at 10:56 AM Christian König
<ckoenig.leichtzumerken@xxxxxxxxx> wrote:
>
> Am 19.03.24 um 15:26 schrieb Alex Deucher:
> > On Tue, Mar 19, 2024 at 8:32 AM Sunil Khatri <sunil.khatri@xxxxxxx> wrote:
> >> Refactor the code so debugfs and devcoredump can reuse
> >> the common information and avoid unnecessary copy of it.
> >>
> >> created a new file which would be the right place to
> >> hold functions which will be used between sysfs, debugfs
> >> and devcoredump.
> >>
> >> Cc: Christian König <christian.koenig@xxxxxxx>
> >> Cc: Alex Deucher <alexander.deucher@xxxxxxx>
> >> Signed-off-by: Sunil Khatri <sunil.khatri@xxxxxxx>
> >> ---
> >> drivers/gpu/drm/amd/amdgpu/Makefile | 2 +-
> >> drivers/gpu/drm/amd/amdgpu/amdgpu.h | 1 +
> >> drivers/gpu/drm/amd/amdgpu/amdgpu_devinfo.c | 151 ++++++++++++++++++++
> >> drivers/gpu/drm/amd/amdgpu/amdgpu_kms.c | 118 +--------------
> >> 4 files changed, 157 insertions(+), 115 deletions(-)
> >> create mode 100644 drivers/gpu/drm/amd/amdgpu/amdgpu_devinfo.c
> >>
> >> diff --git a/drivers/gpu/drm/amd/amdgpu/Makefile b/drivers/gpu/drm/amd/amdgpu/Makefile
> >> index 4536c8ad0e11..05d34f4b18f5 100644
> >> --- a/drivers/gpu/drm/amd/amdgpu/Makefile
> >> +++ b/drivers/gpu/drm/amd/amdgpu/Makefile
> >> @@ -80,7 +80,7 @@ amdgpu-y += amdgpu_device.o amdgpu_doorbell_mgr.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_xcp.o amdgpu_seq64.o amdgpu_aca.o
> >> + amdgpu_ring_mux.o amdgpu_xcp.o amdgpu_seq64.o amdgpu_aca.o amdgpu_devinfo.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 9c62552bec34..0267870aa9b1 100644
> >> --- a/drivers/gpu/drm/amd/amdgpu/amdgpu.h
> >> +++ b/drivers/gpu/drm/amd/amdgpu/amdgpu.h
> >> @@ -1609,4 +1609,5 @@ extern const struct attribute_group amdgpu_vram_mgr_attr_group;
> >> extern const struct attribute_group amdgpu_gtt_mgr_attr_group;
> >> extern const struct attribute_group amdgpu_flash_attr_group;
> >>
> >> +int amdgpu_device_info(struct amdgpu_device *adev, struct drm_amdgpu_info_device *dev_info);
> >> #endif
> >> diff --git a/drivers/gpu/drm/amd/amdgpu/amdgpu_devinfo.c b/drivers/gpu/drm/amd/amdgpu/amdgpu_devinfo.c
> >> new file mode 100644
> >> index 000000000000..d2c15a1dcb0d
> >> --- /dev/null
> >> +++ b/drivers/gpu/drm/amd/amdgpu/amdgpu_devinfo.c
> >> @@ -0,0 +1,151 @@
> >> +// SPDX-License-Identifier: MIT
> >> +/*
> >> + * Copyright 2024 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"
> >> +#include "amd_pcie.h"
> >> +
> >> +#include <drm/amdgpu_drm.h>
> >> +
> >> +int amdgpu_device_info(struct amdgpu_device *adev, struct drm_amdgpu_info_device *dev_info)
> > We can probably keep this in amdgpu_kms.c unless that file is getting
> > too big. I don't think it warrants a new file at this point. If you
> > do keep it in amdgpu_kms.c, I'd recommend renaming it to something
> > like amdgpu_kms_device_info() to keep the naming conventions.
>
> We should not be using this for anything new in the first place.
>
> A whole bunch of the stuff inside the devinfo structure has been
> deprecated because we found that putting everything into one structure
> was a bad idea.

It's a convenient way to collect a lot of useful information that we
want in the core dump. Plus it's not going anywhere because we need
to keep compatibility in the IOCTL.

Alex

>
> Regards,
> Christian.
>
> >
> >> +{
> >> + int ret;
> >> + uint64_t vm_size;
> >> + uint32_t pcie_gen_mask;
> >> +
> >> + if (dev_info == NULL)
> >> + return -EINVAL;
> >> +
> >> + dev_info->device_id = adev->pdev->device;
> >> + dev_info->chip_rev = adev->rev_id;
> >> + dev_info->external_rev = adev->external_rev_id;
> >> + dev_info->pci_rev = adev->pdev->revision;
> >> + dev_info->family = adev->family;
> >> + dev_info->num_shader_engines = adev->gfx.config.max_shader_engines;
> >> + dev_info->num_shader_arrays_per_engine = adev->gfx.config.max_sh_per_se;
> >> + /* return all clocks in KHz */
> >> + dev_info->gpu_counter_freq = amdgpu_asic_get_xclk(adev) * 10;
> >> + if (adev->pm.dpm_enabled) {
> >> + dev_info->max_engine_clock = amdgpu_dpm_get_sclk(adev, false) * 10;
> >> + dev_info->max_memory_clock = amdgpu_dpm_get_mclk(adev, false) * 10;
> >> + dev_info->min_engine_clock = amdgpu_dpm_get_sclk(adev, true) * 10;
> >> + dev_info->min_memory_clock = amdgpu_dpm_get_mclk(adev, true) * 10;
> >> + } else {
> >> + dev_info->max_engine_clock =
> >> + dev_info->min_engine_clock =
> >> + adev->clock.default_sclk * 10;
> >> + dev_info->max_memory_clock =
> >> + dev_info->min_memory_clock =
> >> + adev->clock.default_mclk * 10;
> >> + }
> >> + dev_info->enabled_rb_pipes_mask = adev->gfx.config.backend_enable_mask;
> >> + dev_info->num_rb_pipes = adev->gfx.config.max_backends_per_se *
> >> + adev->gfx.config.max_shader_engines;
> >> + dev_info->num_hw_gfx_contexts = adev->gfx.config.max_hw_contexts;
> >> + dev_info->ids_flags = 0;
> >> + if (adev->flags & AMD_IS_APU)
> >> + dev_info->ids_flags |= AMDGPU_IDS_FLAGS_FUSION;
> >> + if (adev->gfx.mcbp)
> >> + dev_info->ids_flags |= AMDGPU_IDS_FLAGS_PREEMPTION;
> >> + if (amdgpu_is_tmz(adev))
> >> + dev_info->ids_flags |= AMDGPU_IDS_FLAGS_TMZ;
> >> + if (adev->gfx.config.ta_cntl2_truncate_coord_mode)
> >> + dev_info->ids_flags |= AMDGPU_IDS_FLAGS_CONFORMANT_TRUNC_COORD;
> >> +
> >> + vm_size = adev->vm_manager.max_pfn * AMDGPU_GPU_PAGE_SIZE;
> >> + vm_size -= AMDGPU_VA_RESERVED_TOP;
> >> +
> >> + /* Older VCE FW versions are buggy and can handle only 40bits */
> >> + if (adev->vce.fw_version && adev->vce.fw_version < AMDGPU_VCE_FW_53_45)
> >> + vm_size = min(vm_size, 1ULL << 40);
> >> +
> >> + dev_info->virtual_address_offset = AMDGPU_VA_RESERVED_BOTTOM;
> >> + dev_info->virtual_address_max = min(vm_size, AMDGPU_GMC_HOLE_START);
> >> +
> >> + if (vm_size > AMDGPU_GMC_HOLE_START) {
> >> + dev_info->high_va_offset = AMDGPU_GMC_HOLE_END;
> >> + dev_info->high_va_max = AMDGPU_GMC_HOLE_END | vm_size;
> >> + }
> >> + dev_info->virtual_address_alignment = max_t(u32, PAGE_SIZE, AMDGPU_GPU_PAGE_SIZE);
> >> + dev_info->pte_fragment_size = (1 << adev->vm_manager.fragment_size) * AMDGPU_GPU_PAGE_SIZE;
> >> + dev_info->gart_page_size = max_t(u32, PAGE_SIZE, AMDGPU_GPU_PAGE_SIZE);
> >> + dev_info->cu_active_number = adev->gfx.cu_info.number;
> >> + dev_info->cu_ao_mask = adev->gfx.cu_info.ao_cu_mask;
> >> + dev_info->ce_ram_size = adev->gfx.ce_ram_size;
> >> + memcpy(&dev_info->cu_ao_bitmap[0], &adev->gfx.cu_info.ao_cu_bitmap[0],
> >> + sizeof(adev->gfx.cu_info.ao_cu_bitmap));
> >> + memcpy(&dev_info->cu_bitmap[0], &adev->gfx.cu_info.bitmap[0],
> >> + sizeof(dev_info->cu_bitmap));
> >> + dev_info->vram_type = adev->gmc.vram_type;
> >> + dev_info->vram_bit_width = adev->gmc.vram_width;
> >> + dev_info->vce_harvest_config = adev->vce.harvest_config;
> >> + dev_info->gc_double_offchip_lds_buf =
> >> + adev->gfx.config.double_offchip_lds_buf;
> >> + dev_info->wave_front_size = adev->gfx.cu_info.wave_front_size;
> >> + dev_info->num_shader_visible_vgprs = adev->gfx.config.max_gprs;
> >> + dev_info->num_cu_per_sh = adev->gfx.config.max_cu_per_sh;
> >> + dev_info->num_tcc_blocks = adev->gfx.config.max_texture_channel_caches;
> >> + dev_info->gs_vgt_table_depth = adev->gfx.config.gs_vgt_table_depth;
> >> + dev_info->gs_prim_buffer_depth = adev->gfx.config.gs_prim_buffer_depth;
> >> + dev_info->max_gs_waves_per_vgt = adev->gfx.config.max_gs_threads;
> >> +
> >> + if (adev->family >= AMDGPU_FAMILY_NV)
> >> + dev_info->pa_sc_tile_steering_override =
> >> + adev->gfx.config.pa_sc_tile_steering_override;
> >> +
> >> + dev_info->tcc_disabled_mask = adev->gfx.config.tcc_disabled_mask;
> >> +
> >> + /* Combine the chip gen mask with the platform (CPU/mobo) mask */
> >> + pcie_gen_mask = adev->pm.pcie_gen_mask & (adev->pm.pcie_gen_mask >> 16);
> >> + dev_info->pcie_gen = fls(pcie_gen_mask);
> >> + dev_info->pcie_num_lanes =
> >> + adev->pm.pcie_mlw_mask & CAIL_PCIE_LINK_WIDTH_SUPPORT_X32 ? 32 :
> >> + adev->pm.pcie_mlw_mask & CAIL_PCIE_LINK_WIDTH_SUPPORT_X16 ? 16 :
> >> + adev->pm.pcie_mlw_mask & CAIL_PCIE_LINK_WIDTH_SUPPORT_X12 ? 12 :
> >> + adev->pm.pcie_mlw_mask & CAIL_PCIE_LINK_WIDTH_SUPPORT_X8 ? 8 :
> >> + adev->pm.pcie_mlw_mask & CAIL_PCIE_LINK_WIDTH_SUPPORT_X4 ? 4 :
> >> + adev->pm.pcie_mlw_mask & CAIL_PCIE_LINK_WIDTH_SUPPORT_X2 ? 2 : 1;
> >> +
> >> + dev_info->tcp_cache_size = adev->gfx.config.gc_tcp_l1_size;
> >> + dev_info->num_sqc_per_wgp = adev->gfx.config.gc_num_sqc_per_wgp;
> >> + dev_info->sqc_data_cache_size = adev->gfx.config.gc_l1_data_cache_size_per_sqc;
> >> + dev_info->sqc_inst_cache_size = adev->gfx.config.gc_l1_instruction_cache_size_per_sqc;
> >> + dev_info->gl1c_cache_size = adev->gfx.config.gc_gl1c_size_per_instance *
> >> + adev->gfx.config.gc_gl1c_per_sa;
> >> + dev_info->gl2c_cache_size = adev->gfx.config.gc_gl2c_per_gpu;
> >> + dev_info->mall_size = adev->gmc.mall_size;
> >> +
> >> +
> >> + if (adev->gfx.funcs->get_gfx_shadow_info) {
> >> + struct amdgpu_gfx_shadow_info shadow_info;
> >> +
> >> + ret = amdgpu_gfx_get_gfx_shadow_info(adev, &shadow_info);
> >> + if (!ret) {
> >> + dev_info->shadow_size = shadow_info.shadow_size;
> >> + dev_info->shadow_alignment = shadow_info.shadow_alignment;
> >> + dev_info->csa_size = shadow_info.csa_size;
> >> + dev_info->csa_alignment = shadow_info.csa_alignment;
> >> + }
> >> + }
> >> + return ret;
> >> +}
> > As noted by Lijo, this should probably be a void function since we
> > want to populate as much information as we can and we can't break the
> > IOCTL interface.
> >
> > Alex
> >
> >> diff --git a/drivers/gpu/drm/amd/amdgpu/amdgpu_kms.c b/drivers/gpu/drm/amd/amdgpu/amdgpu_kms.c
> >> index a66d47865e3b..24f775c68a51 100644
> >> --- a/drivers/gpu/drm/amd/amdgpu/amdgpu_kms.c
> >> +++ b/drivers/gpu/drm/amd/amdgpu/amdgpu_kms.c
> >> @@ -850,125 +850,15 @@ int amdgpu_info_ioctl(struct drm_device *dev, void *data, struct drm_file *filp)
> >> }
> >> case AMDGPU_INFO_DEV_INFO: {
> >> struct drm_amdgpu_info_device *dev_info;
> >> - uint64_t vm_size;
> >> - uint32_t pcie_gen_mask;
> >>
> >> dev_info = kzalloc(sizeof(*dev_info), GFP_KERNEL);
> >> if (!dev_info)
> >> return -ENOMEM;
> >>
> >> - dev_info->device_id = adev->pdev->device;
> >> - dev_info->chip_rev = adev->rev_id;
> >> - dev_info->external_rev = adev->external_rev_id;
> >> - dev_info->pci_rev = adev->pdev->revision;
> >> - dev_info->family = adev->family;
> >> - dev_info->num_shader_engines = adev->gfx.config.max_shader_engines;
> >> - dev_info->num_shader_arrays_per_engine = adev->gfx.config.max_sh_per_se;
> >> - /* return all clocks in KHz */
> >> - dev_info->gpu_counter_freq = amdgpu_asic_get_xclk(adev) * 10;
> >> - if (adev->pm.dpm_enabled) {
> >> - dev_info->max_engine_clock = amdgpu_dpm_get_sclk(adev, false) * 10;
> >> - dev_info->max_memory_clock = amdgpu_dpm_get_mclk(adev, false) * 10;
> >> - dev_info->min_engine_clock = amdgpu_dpm_get_sclk(adev, true) * 10;
> >> - dev_info->min_memory_clock = amdgpu_dpm_get_mclk(adev, true) * 10;
> >> - } else {
> >> - dev_info->max_engine_clock =
> >> - dev_info->min_engine_clock =
> >> - adev->clock.default_sclk * 10;
> >> - dev_info->max_memory_clock =
> >> - dev_info->min_memory_clock =
> >> - adev->clock.default_mclk * 10;
> >> - }
> >> - dev_info->enabled_rb_pipes_mask = adev->gfx.config.backend_enable_mask;
> >> - dev_info->num_rb_pipes = adev->gfx.config.max_backends_per_se *
> >> - adev->gfx.config.max_shader_engines;
> >> - dev_info->num_hw_gfx_contexts = adev->gfx.config.max_hw_contexts;
> >> - dev_info->ids_flags = 0;
> >> - if (adev->flags & AMD_IS_APU)
> >> - dev_info->ids_flags |= AMDGPU_IDS_FLAGS_FUSION;
> >> - if (adev->gfx.mcbp)
> >> - dev_info->ids_flags |= AMDGPU_IDS_FLAGS_PREEMPTION;
> >> - if (amdgpu_is_tmz(adev))
> >> - dev_info->ids_flags |= AMDGPU_IDS_FLAGS_TMZ;
> >> - if (adev->gfx.config.ta_cntl2_truncate_coord_mode)
> >> - dev_info->ids_flags |= AMDGPU_IDS_FLAGS_CONFORMANT_TRUNC_COORD;
> >> -
> >> - vm_size = adev->vm_manager.max_pfn * AMDGPU_GPU_PAGE_SIZE;
> >> - vm_size -= AMDGPU_VA_RESERVED_TOP;
> >> -
> >> - /* Older VCE FW versions are buggy and can handle only 40bits */
> >> - if (adev->vce.fw_version &&
> >> - adev->vce.fw_version < AMDGPU_VCE_FW_53_45)
> >> - vm_size = min(vm_size, 1ULL << 40);
> >> -
> >> - dev_info->virtual_address_offset = AMDGPU_VA_RESERVED_BOTTOM;
> >> - dev_info->virtual_address_max =
> >> - min(vm_size, AMDGPU_GMC_HOLE_START);
> >> -
> >> - if (vm_size > AMDGPU_GMC_HOLE_START) {
> >> - dev_info->high_va_offset = AMDGPU_GMC_HOLE_END;
> >> - dev_info->high_va_max = AMDGPU_GMC_HOLE_END | vm_size;
> >> - }
> >> - dev_info->virtual_address_alignment = max_t(u32, PAGE_SIZE, AMDGPU_GPU_PAGE_SIZE);
> >> - dev_info->pte_fragment_size = (1 << adev->vm_managerfragment_size) * AMDGPU_GPU_PAGE_SIZE;
> >> - dev_info->gart_page_size = max_t(u32, PAGE_SIZE, AMDGPU_GPU_PAGE_SIZE);
> >> - dev_info->cu_active_number = adev->gfx.cu_info.number;
> >> - dev_info->cu_ao_mask = adev->gfx.cu_info.ao_cu_mask;
> >> - dev_info->ce_ram_size = adev->gfx.ce_ram_size;
> >> - memcpy(&dev_info->cu_ao_bitmap[0], &adev->gfx.cu_info.ao_cu_bitmap[0],
> >> - sizeof(adev->gfx.cu_info.ao_cu_bitmap));
> >> - memcpy(&dev_info->cu_bitmap[0], &adev->gfx.cu_info.bitmap[0],
> >> - sizeof(dev_info->cu_bitmap));
> >> - dev_info->vram_type = adev->gmc.vram_type;
> >> - dev_info->vram_bit_width = adev->gmc.vram_width;
> >> - dev_info->vce_harvest_config = adev->vce.harvest_config;
> >> - dev_info->gc_double_offchip_lds_buf =
> >> - adev->gfx.config.double_offchip_lds_buf;
> >> - dev_info->wave_front_size = adev->gfx.cu_info.wave_front_size;
> >> - dev_info->num_shader_visible_vgprs = adev->gfx.config.max_gprs;
> >> - dev_info->num_cu_per_sh = adev->gfx.config.max_cu_per_sh;
> >> - dev_info->num_tcc_blocks = adev->gfx.config.max_texture_channel_caches;
> >> - dev_info->gs_vgt_table_depth = adev->gfx.config.gs_vgt_table_depth;
> >> - dev_info->gs_prim_buffer_depth = adev->gfx.config.gs_prim_buffer_depth;
> >> - dev_info->max_gs_waves_per_vgt = adev->gfx.config.max_gs_threads;
> >> -
> >> - if (adev->family >= AMDGPU_FAMILY_NV)
> >> - dev_info->pa_sc_tile_steering_override =
> >> - adev->gfx.config.pa_sc_tile_steering_override;
> >> -
> >> - dev_info->tcc_disabled_mask = adev->gfx.config.tcc_disabled_mask;
> >> -
> >> - /* Combine the chip gen mask with the platform (CPU/mobo) mask. */
> >> - pcie_gen_mask = adev->pm.pcie_gen_mask & (adev->pm.pcie_gen_mask >> 16);
> >> - dev_info->pcie_gen = fls(pcie_gen_mask);
> >> - dev_info->pcie_num_lanes =
> >> - adev->pm.pcie_mlw_mask & CAIL_PCIE_LINK_WIDTH_SUPPORT_X32 ? 32 :
> >> - adev->pm.pcie_mlw_mask & CAIL_PCIE_LINK_WIDTH_SUPPORT_X16 ? 16 :
> >> - adev->pm.pcie_mlw_mask & CAIL_PCIE_LINK_WIDTH_SUPPORT_X12 ? 12 :
> >> - adev->pm.pcie_mlw_mask & CAIL_PCIE_LINK_WIDTH_SUPPORT_X8 ? 8 :
> >> - adev->pm.pcie_mlw_mask & CAIL_PCIE_LINK_WIDTH_SUPPORT_X4 ? 4 :
> >> - adev->pm.pcie_mlw_mask & CAIL_PCIE_LINK_WIDTH_SUPPORT_X2 ? 2 : 1;
> >> -
> >> - dev_info->tcp_cache_size = adev->gfx.config.gc_tcp_l1_size;
> >> - dev_info->num_sqc_per_wgp = adev->gfx.config.gc_num_sqc_per_wgp;
> >> - dev_info->sqc_data_cache_size = adev->gfx.config.gc_l1_data_cache_size_per_sqc;
> >> - dev_info->sqc_inst_cache_size = adev->gfx.config.gc_l1_instruction_cache_size_per_sqc;
> >> - dev_info->gl1c_cache_size = adev->gfx.config.gc_gl1c_size_per_instance *
> >> - adev->gfx.config.gc_gl1c_per_sa;
> >> - dev_info->gl2c_cache_size = adev->gfx.config.gc_gl2c_per_gpu;
> >> - dev_info->mall_size = adev->gmc.mall_size;
> >> -
> >> -
> >> - if (adev->gfx.funcs->get_gfx_shadow_info) {
> >> - struct amdgpu_gfx_shadow_info shadow_info;
> >> -
> >> - ret = amdgpu_gfx_get_gfx_shadow_info(adev, &shadow_info);
> >> - if (!ret) {
> >> - dev_info->shadow_size = shadow_info.shadow_size;
> >> - dev_info->shadow_alignment = shadow_info.shadow_alignment;
> >> - dev_info->csa_size = shadow_info.csa_size;
> >> - dev_info->csa_alignment = shadow_info.csa_alignment;
> >> - }
> >> + ret = amdgpu_device_info(adev, dev_info);
> >> + if (!ret) {
> >> + kfree(dev_info);
> >> + return ret;
> >> }
> >>
> >> ret = copy_to_user(out, dev_info,
> >> --
> >> 2.34.1
> >>
>

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In reply to: Christian König: "Re: [PATCH] drm/amdgpu: refactor code to reuse system information"
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