[PATCH] drm/amdgpu: Add unique_id support for sienna cichlid

[Kent Russell <kent.russell@xxxxxxx>]

This is being added to SMU Metrics, so add the required tie-ins in the
kernel. Also create the corresponding unique_id sysfs file.

Signed-off-by: Kent Russell <kent.russell@xxxxxxx>
---
 drivers/gpu/drm/amd/pm/amdgpu_pm.c            |  3 +-
 .../pmfw_if/smu11_driver_if_sienna_cichlid.h  | 12 +++++--
 .../amd/pm/swsmu/smu11/sienna_cichlid_ppt.c   | 33 +++++++++++++++++++
 3 files changed, 45 insertions(+), 3 deletions(-)

diff --git a/drivers/gpu/drm/amd/pm/amdgpu_pm.c b/drivers/gpu/drm/amd/pm/amdgpu_pm.c
index ad5da252228b..f638bcfc3faa 100644
--- a/drivers/gpu/drm/amd/pm/amdgpu_pm.c
+++ b/drivers/gpu/drm/amd/pm/amdgpu_pm.c
@@ -1969,7 +1969,8 @@ static int default_attr_update(struct amdgpu_device *adev, struct amdgpu_device_
 		if (asic_type != CHIP_VEGA10 &&
 		    asic_type != CHIP_VEGA20 &&
 		    asic_type != CHIP_ARCTURUS &&
-		    asic_type != CHIP_ALDEBARAN)
+		    asic_type != CHIP_ALDEBARAN &&
+		    asic_type != CHIP_SIENNA_CICHLID)
 			*states = ATTR_STATE_UNSUPPORTED;
 	} else if (DEVICE_ATTR_IS(pp_features)) {
 		if (adev->flags & AMD_IS_APU || asic_type < CHIP_VEGA10)
diff --git a/drivers/gpu/drm/amd/pm/swsmu/inc/pmfw_if/smu11_driver_if_sienna_cichlid.h b/drivers/gpu/drm/amd/pm/swsmu/inc/pmfw_if/smu11_driver_if_sienna_cichlid.h
index b253be602cc2..c09dec2c4e1e 100644
--- a/drivers/gpu/drm/amd/pm/swsmu/inc/pmfw_if/smu11_driver_if_sienna_cichlid.h
+++ b/drivers/gpu/drm/amd/pm/swsmu/inc/pmfw_if/smu11_driver_if_sienna_cichlid.h
@@ -1419,8 +1419,12 @@ typedef struct {
   uint8_t  PcieRate               ;
   uint8_t  PcieWidth              ;
   uint16_t AverageGfxclkFrequencyTarget;
-  uint16_t Padding16_2;
 
+  //PMFW-8711
+  uint32_t PublicSerialNumLower32;
+  uint32_t PublicSerialNumUpper32;
+
+  uint16_t Padding16_2;
 } SmuMetrics_t;
 
 typedef struct {
@@ -1476,8 +1480,12 @@ typedef struct {
   uint8_t  PcieRate               ;
   uint8_t  PcieWidth              ;
   uint16_t AverageGfxclkFrequencyTarget;
-  uint16_t Padding16_2;
 
+  //PMFW-8711
+  uint32_t PublicSerialNumLower32;
+  uint32_t PublicSerialNumUpper32;
+
+  uint16_t Padding16_2;
 } SmuMetrics_V2_t;
 
 typedef struct {
diff --git a/drivers/gpu/drm/amd/pm/swsmu/smu11/sienna_cichlid_ppt.c b/drivers/gpu/drm/amd/pm/swsmu/smu11/sienna_cichlid_ppt.c
index 2a7da2bad96a..048014f05b35 100644
--- a/drivers/gpu/drm/amd/pm/swsmu/smu11/sienna_cichlid_ppt.c
+++ b/drivers/gpu/drm/amd/pm/swsmu/smu11/sienna_cichlid_ppt.c
@@ -451,6 +451,38 @@ static int sienna_cichlid_setup_pptable(struct smu_context *smu)
 	return ret;
 }
 
+static void sienna_cichlid_get_unique_id(struct smu_context *smu)
+{
+	struct amdgpu_device *adev = smu->adev;
+	struct smu_table_context *smu_table = &smu->smu_table;
+	SmuMetrics_t *metrics =
+		&(((SmuMetricsExternal_t *)(smu_table->metrics_table))->SmuMetrics);
+	SmuMetrics_V2_t *metrics_v2 =
+		&(((SmuMetricsExternal_t *)(smu_table->metrics_table))->SmuMetrics_V2);
+	uint32_t upper32 = 0, lower32 = 0;
+	int ret;
+
+	mutex_lock(&smu->metrics_lock);
+	ret = smu_cmn_get_metrics_table_locked(smu, NULL, false);
+	if (ret)
+		goto out_unlock;
+
+	bool use_metrics_v2 = ((smu->adev->ip_versions[MP1_HWIP][0] == IP_VERSION(11, 0, 7)) &&
+		(smu->smc_fw_version >= 0x3A4300)) ? true : false;
+
+	upper32 = use_metrics_v2 ? metrics_v2->PublicSerialNumUpper32 :
+				   metrics->PublicSerialNumUpper32;
+	lower32 = use_metrics_v2 ? metrics_v2->PublicSerialNumLower32 :
+				   metrics->PublicSerialNumLower32;
+
+out_unlock:
+	mutex_unlock(&smu->metrics_lock);
+
+	adev->unique_id = ((uint64_t)upper32 << 32) | lower32;
+	if (adev->serial[0] == '\0')
+		sprintf(adev->serial, "%016llx", adev->unique_id);
+}
+
 static int sienna_cichlid_tables_init(struct smu_context *smu)
 {
 	struct smu_table_context *smu_table = &smu->smu_table;
@@ -4012,6 +4044,7 @@ static const struct pptable_funcs sienna_cichlid_ppt_funcs = {
 	.set_mp1_state = sienna_cichlid_set_mp1_state,
 	.stb_collect_info = sienna_cichlid_stb_get_data_direct,
 	.get_ecc_info = sienna_cichlid_get_ecc_info,
+	.get_unique_id = sienna_cichlid_get_unique_id,
 };
 
 void sienna_cichlid_set_ppt_funcs(struct smu_context *smu)
-- 
2.25.1