Add xgmi_plpd_policy sysfs node for users to check and select xgmi
per-link power down policy:
- arg 0: disallow plpd
- arg 1: default policy
- arg 2: optimized policy
v2: split from smu v13.0.6 code and miscellaneous updates
v3: add usage comments around set/get functions
Signed-off-by: Le Ma <le.ma@xxxxxxx>
Reviewed-by: Asad Kamal <asad.kamal@xxxxxxx>
---
drivers/gpu/drm/amd/pm/amdgpu_dpm.c | 43 ++++++++++++++++
drivers/gpu/drm/amd/pm/amdgpu_pm.c | 68 +++++++++++++++++++++++++
drivers/gpu/drm/amd/pm/inc/amdgpu_dpm.h | 5 ++
3 files changed, 116 insertions(+)
diff --git a/drivers/gpu/drm/amd/pm/amdgpu_dpm.c b/drivers/gpu/drm/amd/pm/amdgpu_dpm.c
index 078aaaa53162..9a157fe4cbc7 100644
--- a/drivers/gpu/drm/amd/pm/amdgpu_dpm.c
+++ b/drivers/gpu/drm/amd/pm/amdgpu_dpm.c
@@ -365,6 +365,49 @@ int amdgpu_dpm_allow_xgmi_power_down(struct amdgpu_device *adev, bool en)
return ret;
}
+int amdgpu_dpm_get_xgmi_plpd_mode(struct amdgpu_device *adev, char **mode_desc)
+{
+ struct smu_context *smu = adev->powerplay.pp_handle;
+ int mode = XGMI_PLPD_NONE;
+
+ if (is_support_sw_smu(adev)) {
+ mode = smu->plpd_mode;
+ if (mode_desc == NULL)
+ return mode;
+ switch (smu->plpd_mode) {
+ case XGMI_PLPD_DISALLOW:
+ *mode_desc = "disallow";
+ break;
+ case XGMI_PLPD_DEFAULT:
+ *mode_desc = "default";
+ break;
+ case XGMI_PLPD_OPTIMIZED:
+ *mode_desc = "optimized";
+ break;
+ case XGMI_PLPD_NONE:
+ default:
+ *mode_desc = "none";
+ break;
+ }
+ }
+
+ return mode;
+}
+
+int amdgpu_dpm_set_xgmi_plpd_mode(struct amdgpu_device *adev, int mode)
+{
+ struct smu_context *smu = adev->powerplay.pp_handle;
+ int ret = -EOPNOTSUPP;
+
+ if (is_support_sw_smu(adev)) {
+ mutex_lock(&adev->pm.mutex);
+ ret = smu_set_xgmi_plpd_mode(smu, mode);
+ mutex_unlock(&adev->pm.mutex);
+ }
+
+ return ret;
+}
+
int amdgpu_dpm_enable_mgpu_fan_boost(struct amdgpu_device *adev)
{
void *pp_handle = adev->powerplay.pp_handle;
diff --git a/drivers/gpu/drm/amd/pm/amdgpu_pm.c b/drivers/gpu/drm/amd/pm/amdgpu_pm.c
index 2807f3bd9ebe..745f5b6a2826 100644
--- a/drivers/gpu/drm/amd/pm/amdgpu_pm.c
+++ b/drivers/gpu/drm/amd/pm/amdgpu_pm.c
@@ -1991,6 +1991,70 @@ static int ss_bias_attr_update(struct amdgpu_device *adev, struct amdgpu_device_
return 0;
}
+/* Following items will be read out to indicate current plpd policy:
+ * - -1: none
+ * - 0: disallow
+ * - 1: default
+ * - 2: optimized
+ */
+static ssize_t amdgpu_get_xgmi_plpd_policy(struct device *dev,
+ struct device_attribute *attr,
+ char *buf)
+{
+ struct drm_device *ddev = dev_get_drvdata(dev);
+ struct amdgpu_device *adev = drm_to_adev(ddev);
+ char *mode_desc = "none";
+ int mode;
+
+ if (amdgpu_in_reset(adev))
+ return -EPERM;
+ if (adev->in_suspend && !adev->in_runpm)
+ return -EPERM;
+
+ mode = amdgpu_dpm_get_xgmi_plpd_mode(adev, &mode_desc);
+
+ return sysfs_emit(buf, "%d: %s\n", mode, mode_desc);
+}
+
+/* Following argument value is expected from user to change plpd policy
+ * - arg 0: disallow plpd
+ * - arg 1: default policy
+ * - arg 2: optimized policy
+ */
+static ssize_t amdgpu_set_xgmi_plpd_policy(struct device *dev,
+ struct device_attribute *attr,
+ const char *buf, size_t count)
+{
+ struct drm_device *ddev = dev_get_drvdata(dev);
+ struct amdgpu_device *adev = drm_to_adev(ddev);
+ int mode, ret;
+
+ if (amdgpu_in_reset(adev))
+ return -EPERM;
+ if (adev->in_suspend && !adev->in_runpm)
+ return -EPERM;
+
+ ret = kstrtos32(buf, 0, &mode);
+ if (ret)
+ return -EINVAL;
+
+ ret = pm_runtime_get_sync(ddev->dev);
+ if (ret < 0) {
+ pm_runtime_put_autosuspend(ddev->dev);
+ return ret;
+ }
+
+ ret = amdgpu_dpm_set_xgmi_plpd_mode(adev, mode);
+
+ pm_runtime_mark_last_busy(ddev->dev);
+ pm_runtime_put_autosuspend(ddev->dev);
+
+ if (ret)
+ return ret;
+
+ return count;
+}
+
static struct amdgpu_device_attr amdgpu_device_attrs[] = {
AMDGPU_DEVICE_ATTR_RW(power_dpm_state, ATTR_FLAG_BASIC|ATTR_FLAG_ONEVF),
AMDGPU_DEVICE_ATTR_RW(power_dpm_force_performance_level, ATTR_FLAG_BASIC|ATTR_FLAG_ONEVF),
@@ -2026,6 +2090,7 @@ static struct amdgpu_device_attr amdgpu_device_attrs[] = {
.attr_update = ss_power_attr_update),
AMDGPU_DEVICE_ATTR_RW(smartshift_bias, ATTR_FLAG_BASIC,
.attr_update = ss_bias_attr_update),
+ AMDGPU_DEVICE_ATTR_RW(xgmi_plpd_policy, ATTR_FLAG_BASIC),
};
static int default_attr_update(struct amdgpu_device *adev, struct amdgpu_device_attr *attr,
@@ -2123,6 +2188,9 @@ static int default_attr_update(struct amdgpu_device *adev, struct amdgpu_device_
*states = ATTR_STATE_UNSUPPORTED;
else if (gc_ver == IP_VERSION(10, 3, 0) && amdgpu_sriov_vf(adev))
*states = ATTR_STATE_UNSUPPORTED;
+ } else if (DEVICE_ATTR_IS(xgmi_plpd_policy)) {
+ if (amdgpu_dpm_get_xgmi_plpd_mode(adev, NULL) == XGMI_PLPD_NONE)
+ *states = ATTR_STATE_UNSUPPORTED;
}
switch (gc_ver) {
diff --git a/drivers/gpu/drm/amd/pm/inc/amdgpu_dpm.h b/drivers/gpu/drm/amd/pm/inc/amdgpu_dpm.h
index 5efdba6e358f..564494f29717 100644
--- a/drivers/gpu/drm/amd/pm/inc/amdgpu_dpm.h
+++ b/drivers/gpu/drm/amd/pm/inc/amdgpu_dpm.h
@@ -426,6 +426,11 @@ int amdgpu_dpm_set_df_cstate(struct amdgpu_device *adev,
int amdgpu_dpm_allow_xgmi_power_down(struct amdgpu_device *adev, bool en);
+int amdgpu_dpm_get_xgmi_plpd_mode(struct amdgpu_device *adev,
+ char **mode);
+
+int amdgpu_dpm_set_xgmi_plpd_mode(struct amdgpu_device *adev, int mode);
+
int amdgpu_dpm_enable_mgpu_fan_boost(struct amdgpu_device *adev);
int amdgpu_dpm_set_clockgating_by_smu(struct amdgpu_device *adev,
--
2.38.1
