Re: [PATCH] drm/amd/powerplay: unified VRAM address for driver table interaction with SMU V2

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On Wed, Jan 1, 2020 at 9:40 PM Evan Quan <evan.quan@xxxxxxx> wrote:
>
> By this, we can avoid to pass in the VRAM address on every table
> transferring. That puts extra unnecessary traffics on SMU on
> some cases(e.g. polling the amdgpu_pm_info sysfs interface).
>
> V2: document what the driver table is for and how it works
>
> Change-Id: Ifb74d9cd89790b301e88d472b29cdb9b0365b65a
> Signed-off-by: Evan Quan <evan.quan@xxxxxxx>

Acked-by: Alex Deucher <alexander.deucher@xxxxxxx>

> ---
>  drivers/gpu/drm/amd/powerplay/amdgpu_smu.c    | 98 ++++++++++++-------
>  drivers/gpu/drm/amd/powerplay/arcturus_ppt.c  |  3 +-
>  .../gpu/drm/amd/powerplay/inc/amdgpu_smu.h    | 10 ++
>  drivers/gpu/drm/amd/powerplay/inc/smu_v11_0.h |  2 +
>  drivers/gpu/drm/amd/powerplay/inc/smu_v12_0.h |  2 +
>  drivers/gpu/drm/amd/powerplay/navi10_ppt.c    |  1 +
>  drivers/gpu/drm/amd/powerplay/renoir_ppt.c    |  1 +
>  drivers/gpu/drm/amd/powerplay/smu_internal.h  |  2 +
>  drivers/gpu/drm/amd/powerplay/smu_v11_0.c     | 18 ++++
>  drivers/gpu/drm/amd/powerplay/smu_v12_0.c     | 26 +++--
>  drivers/gpu/drm/amd/powerplay/vega20_ppt.c    |  1 +
>  11 files changed, 117 insertions(+), 47 deletions(-)
>
> diff --git a/drivers/gpu/drm/amd/powerplay/amdgpu_smu.c b/drivers/gpu/drm/amd/powerplay/amdgpu_smu.c
> index 95238ad38de8..beea4d9e82d4 100644
> --- a/drivers/gpu/drm/amd/powerplay/amdgpu_smu.c
> +++ b/drivers/gpu/drm/amd/powerplay/amdgpu_smu.c
> @@ -519,26 +519,19 @@ int smu_update_table(struct smu_context *smu, enum smu_table_id table_index, int
>  {
>         struct smu_table_context *smu_table = &smu->smu_table;
>         struct amdgpu_device *adev = smu->adev;
> -       struct smu_table *table = NULL;
> -       int ret = 0;
> +       struct smu_table *table = &smu_table->driver_table;
>         int table_id = smu_table_get_index(smu, table_index);
> +       uint32_t table_size;
> +       int ret = 0;
>
>         if (!table_data || table_id >= SMU_TABLE_COUNT || table_id < 0)
>                 return -EINVAL;
>
> -       table = &smu_table->tables[table_index];
> +       table_size = smu_table->tables[table_index].size;
>
>         if (drv2smu)
> -               memcpy(table->cpu_addr, table_data, table->size);
> +               memcpy(table->cpu_addr, table_data, table_size);
>
> -       ret = smu_send_smc_msg_with_param(smu, SMU_MSG_SetDriverDramAddrHigh,
> -                                         upper_32_bits(table->mc_address));
> -       if (ret)
> -               return ret;
> -       ret = smu_send_smc_msg_with_param(smu, SMU_MSG_SetDriverDramAddrLow,
> -                                         lower_32_bits(table->mc_address));
> -       if (ret)
> -               return ret;
>         ret = smu_send_smc_msg_with_param(smu, drv2smu ?
>                                           SMU_MSG_TransferTableDram2Smu :
>                                           SMU_MSG_TransferTableSmu2Dram,
> @@ -550,7 +543,7 @@ int smu_update_table(struct smu_context *smu, enum smu_table_id table_index, int
>         adev->nbio.funcs->hdp_flush(adev, NULL);
>
>         if (!drv2smu)
> -               memcpy(table_data, table->cpu_addr, table->size);
> +               memcpy(table_data, table->cpu_addr, table_size);
>
>         return ret;
>  }
> @@ -976,32 +969,56 @@ static int smu_init_fb_allocations(struct smu_context *smu)
>         struct amdgpu_device *adev = smu->adev;
>         struct smu_table_context *smu_table = &smu->smu_table;
>         struct smu_table *tables = smu_table->tables;
> +       struct smu_table *driver_table = &(smu_table->driver_table);
> +       uint32_t max_table_size = 0;
>         int ret, i;
>
> -       for (i = 0; i < SMU_TABLE_COUNT; i++) {
> -               if (tables[i].size == 0)
> -                       continue;
> +       /* VRAM allocation for tool table */
> +       if (tables[SMU_TABLE_PMSTATUSLOG].size) {
>                 ret = amdgpu_bo_create_kernel(adev,
> -                                             tables[i].size,
> -                                             tables[i].align,
> -                                             tables[i].domain,
> -                                             &tables[i].bo,
> -                                             &tables[i].mc_address,
> -                                             &tables[i].cpu_addr);
> -               if (ret)
> -                       goto failed;
> +                                             tables[SMU_TABLE_PMSTATUSLOG].size,
> +                                             tables[SMU_TABLE_PMSTATUSLOG].align,
> +                                             tables[SMU_TABLE_PMSTATUSLOG].domain,
> +                                             &tables[SMU_TABLE_PMSTATUSLOG].bo,
> +                                             &tables[SMU_TABLE_PMSTATUSLOG].mc_address,
> +                                             &tables[SMU_TABLE_PMSTATUSLOG].cpu_addr);
> +               if (ret) {
> +                       pr_err("VRAM allocation for tool table failed!\n");
> +                       return ret;
> +               }
>         }
>
> -       return 0;
> -failed:
> -       while (--i >= 0) {
> +       /* VRAM allocation for driver table */
> +       for (i = 0; i < SMU_TABLE_COUNT; i++) {
>                 if (tables[i].size == 0)
>                         continue;
> -               amdgpu_bo_free_kernel(&tables[i].bo,
> -                                     &tables[i].mc_address,
> -                                     &tables[i].cpu_addr);
>
> +               if (i == SMU_TABLE_PMSTATUSLOG)
> +                       continue;
> +
> +               if (max_table_size < tables[i].size)
> +                       max_table_size = tables[i].size;
> +       }
> +
> +       driver_table->size = max_table_size;
> +       driver_table->align = PAGE_SIZE;
> +       driver_table->domain = AMDGPU_GEM_DOMAIN_VRAM;
> +
> +       ret = amdgpu_bo_create_kernel(adev,
> +                                     driver_table->size,
> +                                     driver_table->align,
> +                                     driver_table->domain,
> +                                     &driver_table->bo,
> +                                     &driver_table->mc_address,
> +                                     &driver_table->cpu_addr);
> +       if (ret) {
> +               pr_err("VRAM allocation for driver table failed!\n");
> +               if (tables[SMU_TABLE_PMSTATUSLOG].mc_address)
> +                       amdgpu_bo_free_kernel(&tables[SMU_TABLE_PMSTATUSLOG].bo,
> +                                             &tables[SMU_TABLE_PMSTATUSLOG].mc_address,
> +                                             &tables[SMU_TABLE_PMSTATUSLOG].cpu_addr);
>         }
> +
>         return ret;
>  }
>
> @@ -1009,18 +1026,19 @@ static int smu_fini_fb_allocations(struct smu_context *smu)
>  {
>         struct smu_table_context *smu_table = &smu->smu_table;
>         struct smu_table *tables = smu_table->tables;
> -       uint32_t i = 0;
> +       struct smu_table *driver_table = &(smu_table->driver_table);
>
>         if (!tables)
>                 return 0;
>
> -       for (i = 0; i < SMU_TABLE_COUNT; i++) {
> -               if (tables[i].size == 0)
> -                       continue;
> -               amdgpu_bo_free_kernel(&tables[i].bo,
> -                                     &tables[i].mc_address,
> -                                     &tables[i].cpu_addr);
> -       }
> +       if (tables[SMU_TABLE_PMSTATUSLOG].mc_address)
> +               amdgpu_bo_free_kernel(&tables[SMU_TABLE_PMSTATUSLOG].bo,
> +                                     &tables[SMU_TABLE_PMSTATUSLOG].mc_address,
> +                                     &tables[SMU_TABLE_PMSTATUSLOG].cpu_addr);
> +
> +       amdgpu_bo_free_kernel(&driver_table->bo,
> +                             &driver_table->mc_address,
> +                             &driver_table->cpu_addr);
>
>         return 0;
>  }
> @@ -1091,6 +1109,10 @@ static int smu_smc_table_hw_init(struct smu_context *smu,
>
>         /* smu_dump_pptable(smu); */
>
> +       ret = smu_set_driver_table_location(smu);
> +       if (ret)
> +               return ret;
> +
>         /*
>          * Copy pptable bo in the vram to smc with SMU MSGs such as
>          * SetDriverDramAddr and TransferTableDram2Smu.
> diff --git a/drivers/gpu/drm/amd/powerplay/arcturus_ppt.c b/drivers/gpu/drm/amd/powerplay/arcturus_ppt.c
> index 50b317f4b1e6..064b5201a8a7 100644
> --- a/drivers/gpu/drm/amd/powerplay/arcturus_ppt.c
> +++ b/drivers/gpu/drm/amd/powerplay/arcturus_ppt.c
> @@ -2022,7 +2022,7 @@ static int arcturus_i2c_eeprom_read_data(struct i2c_adapter *control,
>         SwI2cRequest_t req;
>         struct amdgpu_device *adev = to_amdgpu_device(control);
>         struct smu_table_context *smu_table = &adev->smu.smu_table;
> -       struct smu_table *table = &smu_table->tables[SMU_TABLE_I2C_COMMANDS];
> +       struct smu_table *table = &smu_table->driver_table;
>
>         memset(&req, 0, sizeof(req));
>         arcturus_fill_eeprom_i2c_req(&req, false, address, numbytes, data);
> @@ -2261,6 +2261,7 @@ static const struct pptable_funcs arcturus_ppt_funcs = {
>         .check_fw_version = smu_v11_0_check_fw_version,
>         .write_pptable = smu_v11_0_write_pptable,
>         .set_min_dcef_deep_sleep = smu_v11_0_set_min_dcef_deep_sleep,
> +       .set_driver_table_location = smu_v11_0_set_driver_table_location,
>         .set_tool_table_location = smu_v11_0_set_tool_table_location,
>         .notify_memory_pool_location = smu_v11_0_notify_memory_pool_location,
>         .system_features_control = smu_v11_0_system_features_control,
> diff --git a/drivers/gpu/drm/amd/powerplay/inc/amdgpu_smu.h b/drivers/gpu/drm/amd/powerplay/inc/amdgpu_smu.h
> index 02d33b50e735..b0591a8dda41 100644
> --- a/drivers/gpu/drm/amd/powerplay/inc/amdgpu_smu.h
> +++ b/drivers/gpu/drm/amd/powerplay/inc/amdgpu_smu.h
> @@ -260,6 +260,15 @@ struct smu_table_context
>         struct smu_bios_boot_up_values  boot_values;
>         void                            *driver_pptable;
>         struct smu_table                *tables;
> +       /*
> +        * The driver table is just a staging buffer for
> +        * uploading/downloading content from the SMU.
> +        *
> +        * And the table_id for SMU_MSG_TransferTableSmu2Dram/
> +        * SMU_MSG_TransferTableDram2Smu instructs SMU
> +        * which content driver is interested.
> +        */
> +       struct smu_table                driver_table;
>         struct smu_table                memory_pool;
>         uint8_t                         thermal_controller_type;
>
> @@ -498,6 +507,7 @@ struct pptable_funcs {
>         int (*set_gfx_cgpg)(struct smu_context *smu, bool enable);
>         int (*write_pptable)(struct smu_context *smu);
>         int (*set_min_dcef_deep_sleep)(struct smu_context *smu);
> +       int (*set_driver_table_location)(struct smu_context *smu);
>         int (*set_tool_table_location)(struct smu_context *smu);
>         int (*notify_memory_pool_location)(struct smu_context *smu);
>         int (*set_last_dcef_min_deep_sleep_clk)(struct smu_context *smu);
> diff --git a/drivers/gpu/drm/amd/powerplay/inc/smu_v11_0.h b/drivers/gpu/drm/amd/powerplay/inc/smu_v11_0.h
> index db3f78676aeb..662989296174 100644
> --- a/drivers/gpu/drm/amd/powerplay/inc/smu_v11_0.h
> +++ b/drivers/gpu/drm/amd/powerplay/inc/smu_v11_0.h
> @@ -170,6 +170,8 @@ int smu_v11_0_write_pptable(struct smu_context *smu);
>
>  int smu_v11_0_set_min_dcef_deep_sleep(struct smu_context *smu);
>
> +int smu_v11_0_set_driver_table_location(struct smu_context *smu);
> +
>  int smu_v11_0_set_tool_table_location(struct smu_context *smu);
>
>  int smu_v11_0_notify_memory_pool_location(struct smu_context *smu);
> diff --git a/drivers/gpu/drm/amd/powerplay/inc/smu_v12_0.h b/drivers/gpu/drm/amd/powerplay/inc/smu_v12_0.h
> index 3f1cd06e273c..d79e54b5ebf6 100644
> --- a/drivers/gpu/drm/amd/powerplay/inc/smu_v12_0.h
> +++ b/drivers/gpu/drm/amd/powerplay/inc/smu_v12_0.h
> @@ -90,4 +90,6 @@ int smu_v12_0_mode2_reset(struct smu_context *smu);
>  int smu_v12_0_set_soft_freq_limited_range(struct smu_context *smu, enum smu_clk_type clk_type,
>                             uint32_t min, uint32_t max);
>
> +int smu_v12_0_set_driver_table_location(struct smu_context *smu);
> +
>  #endif
> diff --git a/drivers/gpu/drm/amd/powerplay/navi10_ppt.c b/drivers/gpu/drm/amd/powerplay/navi10_ppt.c
> index bb0915a6388e..a16af3a3843c 100644
> --- a/drivers/gpu/drm/amd/powerplay/navi10_ppt.c
> +++ b/drivers/gpu/drm/amd/powerplay/navi10_ppt.c
> @@ -2112,6 +2112,7 @@ static const struct pptable_funcs navi10_ppt_funcs = {
>         .check_fw_version = smu_v11_0_check_fw_version,
>         .write_pptable = smu_v11_0_write_pptable,
>         .set_min_dcef_deep_sleep = smu_v11_0_set_min_dcef_deep_sleep,
> +       .set_driver_table_location = smu_v11_0_set_driver_table_location,
>         .set_tool_table_location = smu_v11_0_set_tool_table_location,
>         .notify_memory_pool_location = smu_v11_0_notify_memory_pool_location,
>         .system_features_control = smu_v11_0_system_features_control,
> diff --git a/drivers/gpu/drm/amd/powerplay/renoir_ppt.c b/drivers/gpu/drm/amd/powerplay/renoir_ppt.c
> index 506cc6bf4bc0..861e6410363b 100644
> --- a/drivers/gpu/drm/amd/powerplay/renoir_ppt.c
> +++ b/drivers/gpu/drm/amd/powerplay/renoir_ppt.c
> @@ -920,6 +920,7 @@ static const struct pptable_funcs renoir_ppt_funcs = {
>         .get_dpm_ultimate_freq = smu_v12_0_get_dpm_ultimate_freq,
>         .mode2_reset = smu_v12_0_mode2_reset,
>         .set_soft_freq_limited_range = smu_v12_0_set_soft_freq_limited_range,
> +       .set_driver_table_location = smu_v12_0_set_driver_table_location,
>  };
>
>  void renoir_set_ppt_funcs(struct smu_context *smu)
> diff --git a/drivers/gpu/drm/amd/powerplay/smu_internal.h b/drivers/gpu/drm/amd/powerplay/smu_internal.h
> index 77864e4236c4..783319ec8bf9 100644
> --- a/drivers/gpu/drm/amd/powerplay/smu_internal.h
> +++ b/drivers/gpu/drm/amd/powerplay/smu_internal.h
> @@ -61,6 +61,8 @@
>         ((smu)->ppt_funcs->write_pptable ? (smu)->ppt_funcs->write_pptable((smu)) : 0)
>  #define smu_set_min_dcef_deep_sleep(smu) \
>         ((smu)->ppt_funcs->set_min_dcef_deep_sleep ? (smu)->ppt_funcs->set_min_dcef_deep_sleep((smu)) : 0)
> +#define smu_set_driver_table_location(smu) \
> +       ((smu)->ppt_funcs->set_driver_table_location ? (smu)->ppt_funcs->set_driver_table_location((smu)) : 0)
>  #define smu_set_tool_table_location(smu) \
>         ((smu)->ppt_funcs->set_tool_table_location ? (smu)->ppt_funcs->set_tool_table_location((smu)) : 0)
>  #define smu_notify_memory_pool_location(smu) \
> diff --git a/drivers/gpu/drm/amd/powerplay/smu_v11_0.c b/drivers/gpu/drm/amd/powerplay/smu_v11_0.c
> index 6fb93eb6ab39..e804f9854027 100644
> --- a/drivers/gpu/drm/amd/powerplay/smu_v11_0.c
> +++ b/drivers/gpu/drm/amd/powerplay/smu_v11_0.c
> @@ -776,6 +776,24 @@ int smu_v11_0_set_min_dcef_deep_sleep(struct smu_context *smu)
>         return smu_v11_0_set_deep_sleep_dcefclk(smu, table_context->boot_values.dcefclk / 100);
>  }
>
> +int smu_v11_0_set_driver_table_location(struct smu_context *smu)
> +{
> +       struct smu_table *driver_table = &smu->smu_table.driver_table;
> +       int ret = 0;
> +
> +       if (driver_table->mc_address) {
> +               ret = smu_send_smc_msg_with_param(smu,
> +                               SMU_MSG_SetDriverDramAddrHigh,
> +                               upper_32_bits(driver_table->mc_address));
> +               if (!ret)
> +                       ret = smu_send_smc_msg_with_param(smu,
> +                               SMU_MSG_SetDriverDramAddrLow,
> +                               lower_32_bits(driver_table->mc_address));
> +       }
> +
> +       return ret;
> +}
> +
>  int smu_v11_0_set_tool_table_location(struct smu_context *smu)
>  {
>         int ret = 0;
> diff --git a/drivers/gpu/drm/amd/powerplay/smu_v12_0.c b/drivers/gpu/drm/amd/powerplay/smu_v12_0.c
> index 9e27462d0f4e..870e6db2907e 100644
> --- a/drivers/gpu/drm/amd/powerplay/smu_v12_0.c
> +++ b/drivers/gpu/drm/amd/powerplay/smu_v12_0.c
> @@ -318,14 +318,6 @@ int smu_v12_0_fini_smc_tables(struct smu_context *smu)
>  int smu_v12_0_populate_smc_tables(struct smu_context *smu)
>  {
>         struct smu_table_context *smu_table = &smu->smu_table;
> -       struct smu_table *table = NULL;
> -
> -       table = &smu_table->tables[SMU_TABLE_DPMCLOCKS];
> -       if (!table)
> -               return -EINVAL;
> -
> -       if (!table->cpu_addr)
> -               return -EINVAL;
>
>         return smu_update_table(smu, SMU_TABLE_DPMCLOCKS, 0, smu_table->clocks_table, false);
>  }
> @@ -514,3 +506,21 @@ int smu_v12_0_set_soft_freq_limited_range(struct smu_context *smu, enum smu_clk_
>
>         return ret;
>  }
> +
> +int smu_v12_0_set_driver_table_location(struct smu_context *smu)
> +{
> +       struct smu_table *driver_table = &smu->smu_table.driver_table;
> +       int ret = 0;
> +
> +       if (driver_table->mc_address) {
> +               ret = smu_send_smc_msg_with_param(smu,
> +                               SMU_MSG_SetDriverDramAddrHigh,
> +                               upper_32_bits(driver_table->mc_address));
> +               if (!ret)
> +                       ret = smu_send_smc_msg_with_param(smu,
> +                               SMU_MSG_SetDriverDramAddrLow,
> +                               lower_32_bits(driver_table->mc_address));
> +       }
> +
> +       return ret;
> +}
> diff --git a/drivers/gpu/drm/amd/powerplay/vega20_ppt.c b/drivers/gpu/drm/amd/powerplay/vega20_ppt.c
> index 27bdcdeb08d9..38febd5ca4da 100644
> --- a/drivers/gpu/drm/amd/powerplay/vega20_ppt.c
> +++ b/drivers/gpu/drm/amd/powerplay/vega20_ppt.c
> @@ -3236,6 +3236,7 @@ static const struct pptable_funcs vega20_ppt_funcs = {
>         .check_fw_version = smu_v11_0_check_fw_version,
>         .write_pptable = smu_v11_0_write_pptable,
>         .set_min_dcef_deep_sleep = smu_v11_0_set_min_dcef_deep_sleep,
> +       .set_driver_table_location = smu_v11_0_set_driver_table_location,
>         .set_tool_table_location = smu_v11_0_set_tool_table_location,
>         .notify_memory_pool_location = smu_v11_0_notify_memory_pool_location,
>         .system_features_control = smu_v11_0_system_features_control,
> --
> 2.24.1
>
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