drm/amd/pm: avoid unintentional shutdown due to temperature momentary fluctuation

An intentional delay is added on soft ctf triggered. Then there will
be a double check for the GPU temperature before taking further
action. This can avoid unintended shutdown due to temperature
momentary fluctuation.

Signed-off-by: Evan Quan <evan.quan@amd.com>
Reviewed-by: Lijo Lazar <lijo.lazar@amd.com>
Signed-off-by: Alex Deucher <alexander.deucher@amd.com>

diff --git a/drivers/gpu/drm/amd/amdgpu/amdgpu.h b/drivers/gpu/drm/amd/amdgpu/amdgpu.h
index cc3aaea..2f9c14a 100644 (file)
--- a/drivers/gpu/drm/amd/amdgpu/amdgpu.h
+++ b/drivers/gpu/drm/amd/amdgpu/amdgpu.h
@@ -286,6 +286,9 @@ extern int amdgpu_user_partt_mode;
 #define AMDGPU_SMARTSHIFT_MAX_BIAS (100)
 #define AMDGPU_SMARTSHIFT_MIN_BIAS (-100)
 
+/* Extra time delay(in ms) to eliminate the influence of temperature momentary fluctuation */
+#define AMDGPU_SWCTF_EXTRA_DELAY               50
+
 struct amdgpu_xcp_mgr;
 struct amdgpu_device;
 struct amdgpu_irq_src;

diff --git a/drivers/gpu/drm/amd/pm/powerplay/amd_powerplay.c b/drivers/gpu/drm/amd/pm/powerplay/amd_powerplay.c
index 11b7b4c..ff360c6 100644 (file)
--- a/drivers/gpu/drm/amd/pm/powerplay/amd_powerplay.c
+++ b/drivers/gpu/drm/amd/pm/powerplay/amd_powerplay.c
@@ -26,6 +26,7 @@
 #include <linux/gfp.h>
 #include <linux/slab.h>
 #include <linux/firmware.h>
+#include <linux/reboot.h>
 #include "amd_shared.h"
 #include "amd_powerplay.h"
 #include "power_state.h"
@@ -91,6 +92,45 @@ static int pp_early_init(void *handle)
        return 0;
 }
 
+static void pp_swctf_delayed_work_handler(struct work_struct *work)
+{
+       struct pp_hwmgr *hwmgr =
+               container_of(work, struct pp_hwmgr, swctf_delayed_work.work);
+       struct amdgpu_device *adev = hwmgr->adev;
+       struct amdgpu_dpm_thermal *range =
+                               &adev->pm.dpm.thermal;
+       uint32_t gpu_temperature, size;
+       int ret;
+
+       /*
+        * If the hotspot/edge temperature is confirmed as below SW CTF setting point
+        * after the delay enforced, nothing will be done.
+        * Otherwise, a graceful shutdown will be performed to prevent further damage.
+        */
+       if (range->sw_ctf_threshold &&
+           hwmgr->hwmgr_func->read_sensor) {
+               ret = hwmgr->hwmgr_func->read_sensor(hwmgr,
+                                                    AMDGPU_PP_SENSOR_HOTSPOT_TEMP,
+                                                    &gpu_temperature,
+                                                    &size);
+               /*
+                * For some legacy ASICs, hotspot temperature retrieving might be not
+                * supported. Check the edge temperature instead then.
+                */
+               if (ret == -EOPNOTSUPP)
+                       ret = hwmgr->hwmgr_func->read_sensor(hwmgr,
+                                                            AMDGPU_PP_SENSOR_EDGE_TEMP,
+                                                            &gpu_temperature,
+                                                            &size);
+               if (!ret && gpu_temperature / 1000 < range->sw_ctf_threshold)
+                       return;
+       }
+
+       dev_emerg(adev->dev, "ERROR: GPU over temperature range(SW CTF) detected!\n");
+       dev_emerg(adev->dev, "ERROR: System is going to shutdown due to GPU SW CTF!\n");
+       orderly_poweroff(true);
+}
+
 static int pp_sw_init(void *handle)
 {
        struct amdgpu_device *adev = handle;
@@ -101,6 +141,10 @@ static int pp_sw_init(void *handle)
 
        pr_debug("powerplay sw init %s\n", ret ? "failed" : "successfully");
 
+       if (!ret)
+               INIT_DELAYED_WORK(&hwmgr->swctf_delayed_work,
+                                 pp_swctf_delayed_work_handler);
+
        return ret;
 }
 
@@ -135,6 +179,8 @@ static int pp_hw_fini(void *handle)
        struct amdgpu_device *adev = handle;
        struct pp_hwmgr *hwmgr = adev->powerplay.pp_handle;
 
+       cancel_delayed_work_sync(&hwmgr->swctf_delayed_work);
+
        hwmgr_hw_fini(hwmgr);
 
        return 0;
@@ -221,6 +267,8 @@ static int pp_suspend(void *handle)
        struct amdgpu_device *adev = handle;
        struct pp_hwmgr *hwmgr = adev->powerplay.pp_handle;
 
+       cancel_delayed_work_sync(&hwmgr->swctf_delayed_work);
+
        return hwmgr_suspend(hwmgr);
 }
 

diff --git a/drivers/gpu/drm/amd/pm/powerplay/hwmgr/smu_helper.c b/drivers/gpu/drm/amd/pm/powerplay/hwmgr/smu_helper.c
index bfe80ac..d0b1ab6 100644 (file)
--- a/drivers/gpu/drm/amd/pm/powerplay/hwmgr/smu_helper.c
+++ b/drivers/gpu/drm/amd/pm/powerplay/hwmgr/smu_helper.c
@@ -603,21 +603,17 @@ int phm_irq_process(struct amdgpu_device *adev,
                           struct amdgpu_irq_src *source,
                           struct amdgpu_iv_entry *entry)
 {
+       struct pp_hwmgr *hwmgr = adev->powerplay.pp_handle;
        uint32_t client_id = entry->client_id;
        uint32_t src_id = entry->src_id;
 
        if (client_id == AMDGPU_IRQ_CLIENTID_LEGACY) {
                if (src_id == VISLANDS30_IV_SRCID_CG_TSS_THERMAL_LOW_TO_HIGH) {
-                       dev_emerg(adev->dev, "ERROR: GPU over temperature range(SW CTF) detected!\n");
-                       /*
-                        * SW CTF just occurred.
-                        * Try to do a graceful shutdown to prevent further damage.
-                        */
-                       dev_emerg(adev->dev, "ERROR: System is going to shutdown due to GPU SW CTF!\n");
-                       orderly_poweroff(true);
-               } else if (src_id == VISLANDS30_IV_SRCID_CG_TSS_THERMAL_HIGH_TO_LOW)
+                       schedule_delayed_work(&hwmgr->swctf_delayed_work,
+                                             msecs_to_jiffies(AMDGPU_SWCTF_EXTRA_DELAY));
+               } else if (src_id == VISLANDS30_IV_SRCID_CG_TSS_THERMAL_HIGH_TO_LOW) {
                        dev_emerg(adev->dev, "ERROR: GPU under temperature range detected!\n");
-               else if (src_id == VISLANDS30_IV_SRCID_GPIO_19) {
+               } else if (src_id == VISLANDS30_IV_SRCID_GPIO_19) {
                        dev_emerg(adev->dev, "ERROR: GPU HW Critical Temperature Fault(aka CTF) detected!\n");
                        /*
                         * HW CTF just occurred. Shutdown to prevent further damage.
@@ -626,15 +622,10 @@ int phm_irq_process(struct amdgpu_device *adev,
                        orderly_poweroff(true);
                }
        } else if (client_id == SOC15_IH_CLIENTID_THM) {
-               if (src_id == 0) {
-                       dev_emerg(adev->dev, "ERROR: GPU over temperature range(SW CTF) detected!\n");
-                       /*
-                        * SW CTF just occurred.
-                        * Try to do a graceful shutdown to prevent further damage.
-                        */
-                       dev_emerg(adev->dev, "ERROR: System is going to shutdown due to GPU SW CTF!\n");
-                       orderly_poweroff(true);
-               } else
+               if (src_id == 0)
+                       schedule_delayed_work(&hwmgr->swctf_delayed_work,
+                                             msecs_to_jiffies(AMDGPU_SWCTF_EXTRA_DELAY));
+               else
                        dev_emerg(adev->dev, "ERROR: GPU under temperature range detected!\n");
        } else if (client_id == SOC15_IH_CLIENTID_ROM_SMUIO) {
                dev_emerg(adev->dev, "ERROR: GPU HW Critical Temperature Fault(aka CTF) detected!\n");

diff --git a/drivers/gpu/drm/amd/pm/powerplay/inc/hwmgr.h b/drivers/gpu/drm/amd/pm/powerplay/inc/hwmgr.h
index f1580a2..612d66a 100644 (file)
--- a/drivers/gpu/drm/amd/pm/powerplay/inc/hwmgr.h
+++ b/drivers/gpu/drm/amd/pm/powerplay/inc/hwmgr.h
@@ -811,6 +811,8 @@ struct pp_hwmgr {
        bool gfxoff_state_changed_by_workload;
        uint32_t pstate_sclk_peak;
        uint32_t pstate_mclk_peak;
+
+       struct delayed_work swctf_delayed_work;
 };
 
 int hwmgr_early_init(struct pp_hwmgr *hwmgr);

diff --git a/drivers/gpu/drm/amd/pm/swsmu/amdgpu_smu.c b/drivers/gpu/drm/amd/pm/swsmu/amdgpu_smu.c
index 4dea79a..ce41a83 100644 (file)
--- a/drivers/gpu/drm/amd/pm/swsmu/amdgpu_smu.c
+++ b/drivers/gpu/drm/amd/pm/swsmu/amdgpu_smu.c
@@ -24,6 +24,7 @@
 
 #include <linux/firmware.h>
 #include <linux/pci.h>
+#include <linux/reboot.h>
 
 #include "amdgpu.h"
 #include "amdgpu_smu.h"
@@ -1078,6 +1079,34 @@ static void smu_interrupt_work_fn(struct work_struct *work)
                smu->ppt_funcs->interrupt_work(smu);
 }
 
+static void smu_swctf_delayed_work_handler(struct work_struct *work)
+{
+       struct smu_context *smu =
+               container_of(work, struct smu_context, swctf_delayed_work.work);
+       struct smu_temperature_range *range =
+                               &smu->thermal_range;
+       struct amdgpu_device *adev = smu->adev;
+       uint32_t hotspot_tmp, size;
+
+       /*
+        * If the hotspot temperature is confirmed as below SW CTF setting point
+        * after the delay enforced, nothing will be done.
+        * Otherwise, a graceful shutdown will be performed to prevent further damage.
+        */
+       if (range->software_shutdown_temp &&
+           smu->ppt_funcs->read_sensor &&
+           !smu->ppt_funcs->read_sensor(smu,
+                                        AMDGPU_PP_SENSOR_HOTSPOT_TEMP,
+                                        &hotspot_tmp,
+                                        &size) &&
+           hotspot_tmp / 1000 < range->software_shutdown_temp)
+               return;
+
+       dev_emerg(adev->dev, "ERROR: GPU over temperature range(SW CTF) detected!\n");
+       dev_emerg(adev->dev, "ERROR: System is going to shutdown due to GPU SW CTF!\n");
+       orderly_poweroff(true);
+}
+
 static int smu_sw_init(void *handle)
 {
        struct amdgpu_device *adev = (struct amdgpu_device *)handle;
@@ -1120,6 +1149,9 @@ static int smu_sw_init(void *handle)
        smu->smu_dpm.dpm_level = AMD_DPM_FORCED_LEVEL_AUTO;
        smu->smu_dpm.requested_dpm_level = AMD_DPM_FORCED_LEVEL_AUTO;
 
+       INIT_DELAYED_WORK(&smu->swctf_delayed_work,
+                         smu_swctf_delayed_work_handler);
+
        ret = smu_smc_table_sw_init(smu);
        if (ret) {
                dev_err(adev->dev, "Failed to sw init smc table!\n");
@@ -1600,6 +1632,8 @@ static int smu_smc_hw_cleanup(struct smu_context *smu)
                return ret;
        }
 
+       cancel_delayed_work_sync(&smu->swctf_delayed_work);
+
        ret = smu_disable_dpms(smu);
        if (ret) {
                dev_err(adev->dev, "Fail to disable dpm features!\n");

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 09469c7..6e2069d 100644 (file)
--- a/drivers/gpu/drm/amd/pm/swsmu/inc/amdgpu_smu.h
+++ b/drivers/gpu/drm/amd/pm/swsmu/inc/amdgpu_smu.h
@@ -573,6 +573,8 @@ struct smu_context
        u32 debug_param_reg;
        u32 debug_msg_reg;
        u32 debug_resp_reg;
+
+       struct delayed_work             swctf_delayed_work;
 };
 
 struct i2c_adapter;

diff --git a/drivers/gpu/drm/amd/pm/swsmu/smu11/smu_v11_0.c b/drivers/gpu/drm/amd/pm/swsmu/smu11/smu_v11_0.c
index e1ef88e..aa4a549 100644 (file)
--- a/drivers/gpu/drm/amd/pm/swsmu/smu11/smu_v11_0.c
+++ b/drivers/gpu/drm/amd/pm/swsmu/smu11/smu_v11_0.c
@@ -1412,13 +1412,8 @@ static int smu_v11_0_irq_process(struct amdgpu_device *adev,
        if (client_id == SOC15_IH_CLIENTID_THM) {
                switch (src_id) {
                case THM_11_0__SRCID__THM_DIG_THERM_L2H:
-                       dev_emerg(adev->dev, "ERROR: GPU over temperature range(SW CTF) detected!\n");
-                       /*
-                        * SW CTF just occurred.
-                        * Try to do a graceful shutdown to prevent further damage.
-                        */
-                       dev_emerg(adev->dev, "ERROR: System is going to shutdown due to GPU SW CTF!\n");
-                       orderly_poweroff(true);
+                       schedule_delayed_work(&smu->swctf_delayed_work,
+                                             msecs_to_jiffies(AMDGPU_SWCTF_EXTRA_DELAY));
                break;
                case THM_11_0__SRCID__THM_DIG_THERM_H2L:
                        dev_emerg(adev->dev, "ERROR: GPU under temperature range detected\n");

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 e52c563..3856da6 100644 (file)
--- a/drivers/gpu/drm/amd/pm/swsmu/smu13/smu_v13_0.c
+++ b/drivers/gpu/drm/amd/pm/swsmu/smu13/smu_v13_0.c
@@ -1353,13 +1353,8 @@ static int smu_v13_0_irq_process(struct amdgpu_device *adev,
        if (client_id == SOC15_IH_CLIENTID_THM) {
                switch (src_id) {
                case THM_11_0__SRCID__THM_DIG_THERM_L2H:
-                       dev_emerg(adev->dev, "ERROR: GPU over temperature range(SW CTF) detected!\n");
-                       /*
-                        * SW CTF just occurred.
-                        * Try to do a graceful shutdown to prevent further damage.
-                        */
-                       dev_emerg(adev->dev, "ERROR: System is going to shutdown due to GPU SW CTF!\n");
-                       orderly_poweroff(true);
+                       schedule_delayed_work(&smu->swctf_delayed_work,
+                                             msecs_to_jiffies(AMDGPU_SWCTF_EXTRA_DELAY));
                        break;
                case THM_11_0__SRCID__THM_DIG_THERM_H2L:
                        dev_emerg(adev->dev, "ERROR: GPU under temperature range detected\n");