[PATCH 1/2] drm/amd/pm: Add throttle limit for SMU v13.0.6

[Kamal, Asad]

[AMD Official Use Only - General]

Series is Reviewed-by: Asad Kamal <asad.kamal at amd.com>

Thanks & Regards
Asad

-----Original Message-----
From: amd-gfx <amd-gfx-bounces at lists.freedesktop.org> On Behalf Of Lijo Lazar
Sent: Wednesday, September 20, 2023 4:10 PM
To: amd-gfx at lists.freedesktop.org
Cc: Deucher, Alexander <Alexander.Deucher at amd.com>; Zhang, Hawking <Hawking.Zhang at amd.com>
Subject: [PATCH 1/2] drm/amd/pm: Add throttle limit for SMU v13.0.6

CTF limit represents the max operating temperature and thermal limit gives the limit at which throttling starts. Add support for both limits.
SOC and HBM may have different limit values.*_emergency_max gives  max operating temperature and *_crit_max value represents throttle limit.

Signed-off-by: Lijo Lazar <lijo.lazar at amd.com>
---
 .../drm/amd/pm/swsmu/smu13/smu_v13_0_6_ppt.c  | 34 +++++++++++++++----
 1 file changed, 27 insertions(+), 7 deletions(-)

diff --git a/drivers/gpu/drm/amd/pm/swsmu/smu13/smu_v13_0_6_ppt.c b/drivers/gpu/drm/amd/pm/swsmu/smu13/smu_v13_0_6_ppt.c
index 11a6cd96c601..73db595bf6d9 100644
--- a/drivers/gpu/drm/amd/pm/swsmu/smu13/smu_v13_0_6_ppt.c
+++ b/drivers/gpu/drm/amd/pm/swsmu/smu13/smu_v13_0_6_ppt.c
@@ -165,6 +165,7 @@ static const struct cmn2asic_msg_mapping smu_v13_0_6_message_map[SMU_MSG_MAX_COU
        MSG_MAP(SetSoftMaxGfxClk,                    PPSMC_MSG_SetSoftMaxGfxClk,                0),
        MSG_MAP(PrepareMp1ForUnload,                 PPSMC_MSG_PrepareForDriverUnload,          0),
        MSG_MAP(GetCTFLimit,                         PPSMC_MSG_GetCTFLimit,                     0),
+       MSG_MAP(GetThermalLimit,                     PPSMC_MSG_ReadThrottlerLimit,              0),
        MSG_MAP(ClearMcaOnRead,                      PPSMC_MSG_ClearMcaOnRead,                  0),
        MSG_MAP(QueryValidMcaCount,                  PPSMC_MSG_QueryValidMcaCount,              0),
        MSG_MAP(QueryValidMcaCeCount,                PPSMC_MSG_QueryValidMcaCeCount,            0),
@@ -2110,7 +2111,7 @@ static int smu_v13_0_6_get_thermal_temperature_range(struct smu_context *smu,
                                                     struct smu_temperature_range *range)  {
        struct amdgpu_device *adev = smu->adev;
-       u32 aid_temp, xcd_temp, mem_temp;
+       u32 aid_temp, xcd_temp, max_temp;
        uint32_t smu_version;
        u32 ccd_temp = 0;
        int ret;
@@ -2126,31 +2127,50 @@ static int smu_v13_0_6_get_thermal_temperature_range(struct smu_context *smu,
        if (smu_version < 0x554500)
                return 0;

+       /* Get SOC Max operating temperature */
        ret = smu_cmn_send_smc_msg_with_param(smu, SMU_MSG_GetCTFLimit,
                                              PPSMC_AID_THM_TYPE, &aid_temp);
        if (ret)
                goto failed;
-
        if (adev->flags & AMD_IS_APU) {
                ret = smu_cmn_send_smc_msg_with_param(smu, SMU_MSG_GetCTFLimit,
                                                      PPSMC_CCD_THM_TYPE, &ccd_temp);
                if (ret)
                        goto failed;
        }
-
        ret = smu_cmn_send_smc_msg_with_param(smu, SMU_MSG_GetCTFLimit,
                                              PPSMC_XCD_THM_TYPE, &xcd_temp);
        if (ret)
                goto failed;
-
-       range->hotspot_crit_max = max3(aid_temp, xcd_temp, ccd_temp) *
+       range->hotspot_emergency_max = max3(aid_temp, xcd_temp, ccd_temp) *
                                       SMU_TEMPERATURE_UNITS_PER_CENTIGRADES;
+
+       /* Get HBM Max operating temperature */
        ret = smu_cmn_send_smc_msg_with_param(smu, SMU_MSG_GetCTFLimit,
-                                             PPSMC_HBM_THM_TYPE, &mem_temp);
+                                             PPSMC_HBM_THM_TYPE, &max_temp);
        if (ret)
                goto failed;
+       range->mem_emergency_max =
+               max_temp * SMU_TEMPERATURE_UNITS_PER_CENTIGRADES;
+
+       /* Get SOC thermal throttle limit */
+       ret = smu_cmn_send_smc_msg_with_param(smu, SMU_MSG_GetThermalLimit,
+                                             PPSMC_THROTTLING_LIMIT_TYPE_SOCKET,
+                                             &max_temp);
+       if (ret)
+               goto failed;
+       range->hotspot_crit_max =
+               max_temp * SMU_TEMPERATURE_UNITS_PER_CENTIGRADES;
+
+       /* Get HBM thermal throttle limit */
+       ret = smu_cmn_send_smc_msg_with_param(smu, SMU_MSG_GetThermalLimit,
+                                             PPSMC_THROTTLING_LIMIT_TYPE_HBM,
+                                             &max_temp);
+       if (ret)
+               goto failed;
+
+       range->mem_crit_max = max_temp *
+SMU_TEMPERATURE_UNITS_PER_CENTIGRADES;

-       range->mem_crit_max = mem_temp * SMU_TEMPERATURE_UNITS_PER_CENTIGRADES;
 failed:
        return ret;
 }
--
2.25.1