Re: [V10 7/8] drm/amd/pm: enable Wifi RFI mitigation feature support for SMU13.0.0

["Lazar, Lijo" <lijo.lazar@amd.com>]

On 8/25/2023 2:08 PM, Evan Quan wrote:
> Fulfill the SMU13.0.0 support for Wifi RFI mitigation feature.
> 
> Signed-off-by: Evan Quan <evan.quan@amd.com>
> Reviewed-by: Mario Limonciello <mario.limonciello@amd.com>
> ---
>   drivers/gpu/drm/amd/pm/swsmu/inc/amdgpu_smu.h |  3 +
>   drivers/gpu/drm/amd/pm/swsmu/inc/smu_types.h  |  3 +-
>   drivers/gpu/drm/amd/pm/swsmu/inc/smu_v13_0.h  |  3 +
>   .../gpu/drm/amd/pm/swsmu/smu13/smu_v13_0.c    |  9 +++
>   .../drm/amd/pm/swsmu/smu13/smu_v13_0_0_ppt.c  | 60 +++++++++++++++++++
>   5 files changed, 77 insertions(+), 1 deletion(-)
> 
> diff --git a/drivers/gpu/drm/amd/pm/swsmu/inc/amdgpu_smu.h b/drivers/gpu/drm/amd/pm/swsmu/inc/amdgpu_smu.h
> index 60d595344c45..a081e6bb27c4 100644
> --- a/drivers/gpu/drm/amd/pm/swsmu/inc/amdgpu_smu.h
> +++ b/drivers/gpu/drm/amd/pm/swsmu/inc/amdgpu_smu.h
> @@ -325,6 +325,7 @@ enum smu_table_id
>   	SMU_TABLE_PACE,
>   	SMU_TABLE_ECCINFO,
>   	SMU_TABLE_COMBO_PPTABLE,
> +	SMU_TABLE_WIFIBAND,
>   	SMU_TABLE_COUNT,
>   };
>   
> @@ -1501,6 +1502,8 @@ enum smu_baco_seq {
>   			 __dst_size);					   \
>   })
>   
> +#define HZ_IN_MHZ		1000000U
> +
>   #if !defined(SWSMU_CODE_LAYER_L2) && !defined(SWSMU_CODE_LAYER_L3) && !defined(SWSMU_CODE_LAYER_L4)
>   int smu_get_power_limit(void *handle,
>   			uint32_t *limit,
> diff --git a/drivers/gpu/drm/amd/pm/swsmu/inc/smu_types.h b/drivers/gpu/drm/amd/pm/swsmu/inc/smu_types.h
> index 297b70b9388f..5bbb60289a79 100644
> --- a/drivers/gpu/drm/amd/pm/swsmu/inc/smu_types.h
> +++ b/drivers/gpu/drm/amd/pm/swsmu/inc/smu_types.h
> @@ -245,7 +245,8 @@
>   	__SMU_DUMMY_MAP(AllowGpo),	\
>   	__SMU_DUMMY_MAP(Mode2Reset),	\
>   	__SMU_DUMMY_MAP(RequestI2cTransaction), \
> -	__SMU_DUMMY_MAP(GetMetricsTable),
> +	__SMU_DUMMY_MAP(GetMetricsTable), \
> +	__SMU_DUMMY_MAP(EnableUCLKShadow),
>   
>   #undef __SMU_DUMMY_MAP
>   #define __SMU_DUMMY_MAP(type)	SMU_MSG_##type
> diff --git a/drivers/gpu/drm/amd/pm/swsmu/inc/smu_v13_0.h b/drivers/gpu/drm/amd/pm/swsmu/inc/smu_v13_0.h
> index 355c156d871a..dd70b56aa71e 100644
> --- a/drivers/gpu/drm/amd/pm/swsmu/inc/smu_v13_0.h
> +++ b/drivers/gpu/drm/amd/pm/swsmu/inc/smu_v13_0.h
> @@ -299,5 +299,8 @@ int smu_v13_0_update_pcie_parameters(struct smu_context *smu,
>   				     uint32_t pcie_gen_cap,
>   				     uint32_t pcie_width_cap);
>   
> +int smu_v13_0_enable_uclk_shadow(struct smu_context *smu,
> +				 bool enablement);
> +
>   #endif
>   #endif
> diff --git a/drivers/gpu/drm/amd/pm/swsmu/smu13/smu_v13_0.c b/drivers/gpu/drm/amd/pm/swsmu/smu13/smu_v13_0.c
> index 9b62b45ebb7f..6a5cb582aa92 100644
> --- a/drivers/gpu/drm/amd/pm/swsmu/smu13/smu_v13_0.c
> +++ b/drivers/gpu/drm/amd/pm/swsmu/smu13/smu_v13_0.c
> @@ -2472,3 +2472,12 @@ int smu_v13_0_update_pcie_parameters(struct smu_context *smu,
>   
>   	return 0;
>   }
> +
> +int smu_v13_0_enable_uclk_shadow(struct smu_context *smu,
> +				 bool enablement)
> +{
> +	return smu_cmn_send_smc_msg_with_param(smu,
> +					       SMU_MSG_EnableUCLKShadow,
> +					       enablement,
> +					       NULL);
> +}
> diff --git a/drivers/gpu/drm/amd/pm/swsmu/smu13/smu_v13_0_0_ppt.c b/drivers/gpu/drm/amd/pm/swsmu/smu13/smu_v13_0_0_ppt.c
> index 3d188616ba24..fd3ac18653ed 100644
> --- a/drivers/gpu/drm/amd/pm/swsmu/smu13/smu_v13_0_0_ppt.c
> +++ b/drivers/gpu/drm/amd/pm/swsmu/smu13/smu_v13_0_0_ppt.c
> @@ -154,6 +154,7 @@ static struct cmn2asic_msg_mapping smu_v13_0_0_message_map[SMU_MSG_MAX_COUNT] =
>   	MSG_MAP(AllowGpo,			PPSMC_MSG_SetGpoAllow,           0),
>   	MSG_MAP(AllowIHHostInterrupt,		PPSMC_MSG_AllowIHHostInterrupt,       0),
>   	MSG_MAP(ReenableAcDcInterrupt,		PPSMC_MSG_ReenableAcDcInterrupt,       0),
> +	MSG_MAP(EnableUCLKShadow,		PPSMC_MSG_EnableUCLKShadow,            0),
>   };
>   
>   static struct cmn2asic_mapping smu_v13_0_0_clk_map[SMU_CLK_COUNT] = {
> @@ -237,6 +238,7 @@ static struct cmn2asic_mapping smu_v13_0_0_table_map[SMU_TABLE_COUNT] = {
>   	TAB_MAP(I2C_COMMANDS),
>   	TAB_MAP(ECCINFO),
>   	TAB_MAP(OVERDRIVE),
> +	TAB_MAP(WIFIBAND),
>   };
>   
>   static struct cmn2asic_mapping smu_v13_0_0_pwr_src_map[SMU_POWER_SOURCE_COUNT] = {
> @@ -481,6 +483,9 @@ static int smu_v13_0_0_tables_init(struct smu_context *smu)
>   			PAGE_SIZE, AMDGPU_GEM_DOMAIN_VRAM);
>   	SMU_TABLE_INIT(tables, SMU_TABLE_ECCINFO, sizeof(EccInfoTable_t),
>   			PAGE_SIZE, AMDGPU_GEM_DOMAIN_VRAM);
> +	SMU_TABLE_INIT(tables, SMU_TABLE_WIFIBAND,
> +		       sizeof(WifiBandEntryTable_t), PAGE_SIZE,
> +		       AMDGPU_GEM_DOMAIN_VRAM);
>   
>   	smu_table->metrics_table = kzalloc(sizeof(SmuMetricsExternal_t), GFP_KERNEL);
>   	if (!smu_table->metrics_table)
> @@ -2593,6 +2598,58 @@ static ssize_t smu_v13_0_0_get_ecc_info(struct smu_context *smu,
>   	return ret;
>   }
>   
> +static bool smu_v13_0_0_wbrf_support_check(struct smu_context *smu)
> +{
> +	struct amdgpu_device *adev = smu->adev;
> +
> +	switch (adev->ip_versions[MP1_HWIP][0]) {
> +	case IP_VERSION(13, 0, 0):
> +		return smu->smc_fw_version >= 0x004e6300;
> +	case IP_VERSION(13, 0, 10):
> +		return smu->smc_fw_version >= 0x00503300;
> +	default:
> +		return false;
> +	}
> +}
> +
> +static int smu_v13_0_0_set_wbrf_exclusion_ranges(struct smu_context *smu,
> +						 struct exclusion_range *exclusion_ranges)
> +{
> +	WifiBandEntryTable_t wifi_bands;
> +	int valid_entries = 0;
> +	int ret, i;
> +
> +	memset(&wifi_bands, 0, sizeof(wifi_bands));
> +	for (i = 0; i < ARRAY_SIZE(wifi_bands.WifiBandEntry); i++) {
> +		if (!exclusion_ranges[i].start &&
> +		    !exclusion_ranges[i].end)
> +			break;
> +
> +		/* PMFW expects the inputs to be in Mhz unit */
> +		wifi_bands.WifiBandEntry[valid_entries].LowFreq =
> +			DIV_ROUND_DOWN_ULL(exclusion_ranges[i].start, HZ_IN_MHZ);
> +		wifi_bands.WifiBandEntry[valid_entries++].HighFreq =
> +			DIV_ROUND_UP_ULL(exclusion_ranges[i].end, HZ_IN_MHZ);
> +	}
> +	wifi_bands.WifiBandEntryNum = valid_entries;
> +
> +	/*
> +	 * Per confirm with PMFW team, WifiBandEntryNum = 0
> +	 * is a valid setting. So, there should be no direct
> +	 * return on that.
> +	 */
> +
> +	ret = smu_cmn_update_table(smu,
> +				   SMU_TABLE_WIFIBAND,
> +				   0,
> +				   (void *)(&wifi_bands),
> +				   true);
> +	if (ret)
> +		dev_err(smu->adev->dev, "Failed to set wifiband!");

As mentioned earlier, this doesn't look like a candidate for ERR level. 
For ex: the system will continue to work fine if the last request is for 
removal of certain bands (a device got disconnected). Even otherwise, 
there is a chance that the bands used by newly added device may not 
cause any interference. Same goes for patch 8.

Thanks,
Lijo

> +
> +	return ret;
> +}
> +
>   static const struct pptable_funcs smu_v13_0_0_ppt_funcs = {
>   	.get_allowed_feature_mask = smu_v13_0_0_get_allowed_feature_mask,
>   	.set_default_dpm_table = smu_v13_0_0_set_default_dpm_table,
> @@ -2672,6 +2729,9 @@ static const struct pptable_funcs smu_v13_0_0_ppt_funcs = {
>   	.send_hbm_bad_channel_flag = smu_v13_0_0_send_bad_mem_channel_flag,
>   	.gpo_control = smu_v13_0_gpo_control,
>   	.get_ecc_info = smu_v13_0_0_get_ecc_info,
> +	.is_asic_wbrf_supported = smu_v13_0_0_wbrf_support_check,
> +	.enable_uclk_shadow = smu_v13_0_enable_uclk_shadow,
> +	.set_wbrf_exclusion_ranges = smu_v13_0_0_set_wbrf_exclusion_ranges,
>   };
>   
>   void smu_v13_0_0_set_ppt_funcs(struct smu_context *smu)