Add support to set/get information about different DPM policies. The
support is only available on SOCs which use swsmu architecture.
A DPM policy type may be defined with different levels. For example, a
policy may be defined to select Pstate preference and then later a
pstate preference may be chosen.
Signed-off-by: Lijo Lazar <lijo.lazar@xxxxxxx>
---
v2: Add NULL checks before accessing smu_dpm_policy_ctxt
v3: Rebase to add device_attr_id__pm_policy
v4: Use macro to define policy type for consistency.
v5: Add pm_policy as directory node and keep policy files separately.
Fix logic issue in smu_get_pm_policy
.../gpu/drm/amd/include/kgd_pp_interface.h | 16 +++
drivers/gpu/drm/amd/pm/amdgpu_dpm.c | 30 ++++
drivers/gpu/drm/amd/pm/amdgpu_pm.c | 133 ++++++++++++++++++
drivers/gpu/drm/amd/pm/inc/amdgpu_dpm.h | 5 +
drivers/gpu/drm/amd/pm/swsmu/amdgpu_smu.c | 99 +++++++++++++
drivers/gpu/drm/amd/pm/swsmu/inc/amdgpu_smu.h | 32 +++++
6 files changed, 315 insertions(+)
diff --git a/drivers/gpu/drm/amd/include/kgd_pp_interface.h b/drivers/gpu/drm/amd/include/kgd_pp_interface.h
index a0955cfe41ce..4adfe9f0fd92 100644
--- a/drivers/gpu/drm/amd/include/kgd_pp_interface.h
+++ b/drivers/gpu/drm/amd/include/kgd_pp_interface.h
@@ -273,6 +273,22 @@ enum pp_xgmi_plpd_mode {
XGMI_PLPD_COUNT,
};
+enum pp_pm_policy {
+ PP_PM_POLICY_NONE = -1,
+ PP_PM_POLICY_SOC_PSTATE = 0,
+ PP_PM_POLICY_NUM,
+};
+
+enum pp_policy_soc_pstate {
+ SOC_PSTATE_DEFAULT = 0,
+ SOC_PSTATE_0,
+ SOC_PSTATE_1,
+ SOC_PSTATE_2,
+ SOC_PSTAT_COUNT,
+};
+
+#define PP_POLICY_MAX_LEVELS 5
+
#define PP_GROUP_MASK 0xF0000000
#define PP_GROUP_SHIFT 28
diff --git a/drivers/gpu/drm/amd/pm/amdgpu_dpm.c b/drivers/gpu/drm/amd/pm/amdgpu_dpm.c
index eee919577b44..9c991362b398 100644
--- a/drivers/gpu/drm/amd/pm/amdgpu_dpm.c
+++ b/drivers/gpu/drm/amd/pm/amdgpu_dpm.c
@@ -411,6 +411,36 @@ int amdgpu_dpm_set_xgmi_plpd_mode(struct amdgpu_device *adev, int mode)
return ret;
}
+ssize_t amdgpu_dpm_get_pm_policy_info(struct amdgpu_device *adev,
+ enum pp_pm_policy p_type, char *buf)
+{
+ struct smu_context *smu = adev->powerplay.pp_handle;
+ int ret = -EOPNOTSUPP;
+
+ if (is_support_sw_smu(adev)) {
+ mutex_lock(&adev->pm.mutex);
+ ret = smu_get_pm_policy_info(smu, p_type, buf);
+ mutex_unlock(&adev->pm.mutex);
+ }
+
+ return ret;
+}
+
+int amdgpu_dpm_set_pm_policy(struct amdgpu_device *adev, int policy_type,
+ int policy_level)
+{
+ 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_pm_policy(smu, policy_type, policy_level);
+ 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 110f2fc31754..f1d3423409b4 100644
--- a/drivers/gpu/drm/amd/pm/amdgpu_pm.c
+++ b/drivers/gpu/drm/amd/pm/amdgpu_pm.c
@@ -2278,6 +2278,131 @@ static ssize_t amdgpu_set_xgmi_plpd_policy(struct device *dev,
return count;
}
+/* pm policy attributes */
+struct amdgpu_pm_policy_attr {
+ struct device_attribute dev_attr;
+ enum pp_pm_policy id;
+};
+
+static ssize_t amdgpu_get_pm_policy_attr(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);
+ struct amdgpu_pm_policy_attr *policy_attr;
+
+ policy_attr =
+ container_of(attr, struct amdgpu_pm_policy_attr, dev_attr);
+
+ if (amdgpu_in_reset(adev))
+ return -EPERM;
+ if (adev->in_suspend && !adev->in_runpm)
+ return -EPERM;
+
+ return amdgpu_dpm_get_pm_policy_info(adev, policy_attr->id, buf);
+}
+
+static ssize_t amdgpu_set_pm_policy_attr(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);
+ struct amdgpu_pm_policy_attr *policy_attr;
+ int ret, num_params = 0;
+ char delimiter[] = " \n\t";
+ char tmp_buf[128];
+ char *tmp, *param;
+ long val;
+
+ if (amdgpu_in_reset(adev))
+ return -EPERM;
+ if (adev->in_suspend && !adev->in_runpm)
+ return -EPERM;
+
+ count = min(count, sizeof(tmp_buf));
+ memcpy(tmp_buf, buf, count);
+ tmp_buf[count - 1] = '\0';
+ tmp = tmp_buf;
+
+ tmp = skip_spaces(tmp);
+ while ((param = strsep(&tmp, delimiter))) {
+ if (!strlen(param)) {
+ tmp = skip_spaces(tmp);
+ continue;
+ }
+ ret = kstrtol(param, 0, &val);
+ if (ret)
+ return -EINVAL;
+ num_params++;
+ if (num_params > 1)
+ return -EINVAL;
+ }
+
+ if (num_params != 1)
+ return -EINVAL;
+
+ policy_attr =
+ container_of(attr, struct amdgpu_pm_policy_attr, dev_attr);
+
+ ret = pm_runtime_get_sync(ddev->dev);
+ if (ret < 0) {
+ pm_runtime_put_autosuspend(ddev->dev);
+ return ret;
+ }
+
+ ret = amdgpu_dpm_set_pm_policy(adev, policy_attr->id, val);
+
+ pm_runtime_mark_last_busy(ddev->dev);
+ pm_runtime_put_autosuspend(ddev->dev);
+
+ if (ret)
+ return ret;
+
+ return count;
+}
+
+#define AMDGPU_PM_POLICY_ATTR(_name, _id) \
+ static struct amdgpu_pm_policy_attr pm_policy_attr_##_name = { \
+ .dev_attr = __ATTR(_name, 0644, amdgpu_get_pm_policy_attr, \
+ amdgpu_set_pm_policy_attr), \
+ .id = PP_PM_POLICY_##_id, \
+ };
+
+#define AMDGPU_PM_POLICY_ATTR_PTR(_name) &pm_policy_attr_##_name.dev_attr.attr
+
+AMDGPU_PM_POLICY_ATTR(soc_pstate, SOC_PSTATE)
+
+static struct attribute *pm_policy_attrs[] = {
+ AMDGPU_PM_POLICY_ATTR_PTR(soc_pstate),
+ NULL
+};
+
+static umode_t amdgpu_pm_policy_attr_visible(struct kobject *kobj,
+ struct attribute *attr, int n)
+{
+ struct device *dev = kobj_to_dev(kobj);
+ struct drm_device *ddev = dev_get_drvdata(dev);
+ struct amdgpu_device *adev = drm_to_adev(ddev);
+ struct amdgpu_pm_policy_attr *policy_attr;
+
+ policy_attr =
+ container_of(attr, struct amdgpu_pm_policy_attr, dev_attr.attr);
+
+ if (amdgpu_dpm_get_pm_policy_info(adev, policy_attr->id, NULL) ==
+ -ENOENT)
+ return 0;
+
+ return attr->mode;
+}
+
+const struct attribute_group amdgpu_pm_policy_attr_group = {
+ .name = "pm_policy",
+ .attrs = pm_policy_attrs,
+ .is_visible = amdgpu_pm_policy_attr_visible,
+};
+
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),
@@ -4419,6 +4544,14 @@ int amdgpu_pm_sysfs_init(struct amdgpu_device *adev)
dev_info(adev->dev, "overdrive feature is not supported\n");
}
+ if (amdgpu_dpm_get_pm_policy_info(adev, PP_PM_POLICY_NONE, NULL) !=
+ -EOPNOTSUPP) {
+ ret = devm_device_add_group(adev->dev,
+ &amdgpu_pm_policy_attr_group);
+ if (ret)
+ goto err_out0;
+ }
+
adev->pm.sysfs_initialized = true;
return 0;
diff --git a/drivers/gpu/drm/amd/pm/inc/amdgpu_dpm.h b/drivers/gpu/drm/amd/pm/inc/amdgpu_dpm.h
index 501f8c726e8d..c0f4037d2041 100644
--- a/drivers/gpu/drm/amd/pm/inc/amdgpu_dpm.h
+++ b/drivers/gpu/drm/amd/pm/inc/amdgpu_dpm.h
@@ -598,4 +598,9 @@ enum pp_smu_status amdgpu_dpm_get_uclk_dpm_states(struct amdgpu_device *adev,
unsigned int *num_states);
int amdgpu_dpm_get_dpm_clock_table(struct amdgpu_device *adev,
struct dpm_clocks *clock_table);
+int amdgpu_dpm_set_pm_policy(struct amdgpu_device *adev, int policy_type,
+ int policy_level);
+ssize_t amdgpu_dpm_get_pm_policy_info(struct amdgpu_device *adev,
+ enum pp_pm_policy p_type, char *buf);
+
#endif
diff --git a/drivers/gpu/drm/amd/pm/swsmu/amdgpu_smu.c b/drivers/gpu/drm/amd/pm/swsmu/amdgpu_smu.c
index e61aa4418d44..b7bce8c34634 100644
--- a/drivers/gpu/drm/amd/pm/swsmu/amdgpu_smu.c
+++ b/drivers/gpu/drm/amd/pm/swsmu/amdgpu_smu.c
@@ -3498,6 +3498,105 @@ static int smu_get_prv_buffer_details(void *handle, void **addr, size_t *size)
return 0;
}
+static void smu_print_dpm_policy(struct smu_dpm_policy *policy, char *sysbuf,
+ size_t *size)
+{
+ size_t offset = *size;
+ int level;
+
+ for_each_set_bit(level, &policy->level_mask, PP_POLICY_MAX_LEVELS) {
+ if (level == policy->current_level)
+ offset += sysfs_emit_at(
+ sysbuf, offset, "%d : %s*\n", level,
+ policy->desc->get_desc(policy, level));
+ else
+ offset += sysfs_emit_at(
+ sysbuf, offset, "%d : %s\n", level,
+ policy->desc->get_desc(policy, level));
+ }
+
+ *size = offset;
+}
+
+ssize_t smu_get_pm_policy_info(struct smu_context *smu,
+ enum pp_pm_policy p_type, char *sysbuf)
+{
+ struct smu_dpm_context *dpm_ctxt = &(smu->smu_dpm);
+ struct smu_dpm_policy_ctxt *policy_ctxt;
+ struct smu_dpm_policy *dpm_policy;
+ size_t offset = 0;
+
+ policy_ctxt = dpm_ctxt->dpm_policies;
+ if (!smu->pm_enabled || !smu->adev->pm.dpm_enabled || !policy_ctxt ||
+ !policy_ctxt->policy_mask)
+ return -EOPNOTSUPP;
+
+ if (p_type == PP_PM_POLICY_NONE)
+ return -EINVAL;
+
+ dpm_policy = smu_get_pm_policy(smu, p_type);
+ if (!dpm_policy || !dpm_policy->level_mask || !dpm_policy->desc)
+ return -ENOENT;
+
+ if (!sysbuf)
+ return -EINVAL;
+
+ smu_print_dpm_policy(dpm_policy, sysbuf, &offset);
+
+ return offset;
+}
+
+struct smu_dpm_policy *smu_get_pm_policy(struct smu_context *smu,
+ enum pp_pm_policy p_type)
+{
+ struct smu_dpm_context *dpm_ctxt = &(smu->smu_dpm);
+ struct smu_dpm_policy_ctxt *policy_ctxt;
+ int i;
+
+ policy_ctxt = dpm_ctxt->dpm_policies;
+ if (!policy_ctxt)
+ return NULL;
+
+ for (i = 0; i < hweight32(policy_ctxt->policy_mask); ++i) {
+ if (policy_ctxt->policies[i].policy_type == p_type)
+ return &policy_ctxt->policies[i];
+ }
+
+ return NULL;
+}
+
+int smu_set_pm_policy(struct smu_context *smu, enum pp_pm_policy p_type,
+ int level)
+{
+ struct smu_dpm_context *dpm_ctxt = &(smu->smu_dpm);
+ struct smu_dpm_policy *dpm_policy = NULL;
+ struct smu_dpm_policy_ctxt *policy_ctxt;
+ int ret = -EOPNOTSUPP;
+
+ policy_ctxt = dpm_ctxt->dpm_policies;
+ if (!smu->pm_enabled || !smu->adev->pm.dpm_enabled || !policy_ctxt ||
+ !policy_ctxt->policy_mask)
+ return ret;
+
+ if (level < 0 || level >= PP_POLICY_MAX_LEVELS)
+ return -EINVAL;
+
+ dpm_policy = smu_get_pm_policy(smu, p_type);
+
+ if (!dpm_policy || !dpm_policy->level_mask || !dpm_policy->set_policy)
+ return ret;
+
+ if (dpm_policy->current_level == level)
+ return 0;
+
+ ret = dpm_policy->set_policy(smu, level);
+
+ if (!ret)
+ dpm_policy->current_level = level;
+
+ return ret;
+}
+
int smu_set_xgmi_plpd_mode(struct smu_context *smu,
enum pp_xgmi_plpd_mode mode)
{
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 0917dec8efe3..a35ffe5d2021 100644
--- a/drivers/gpu/drm/amd/pm/swsmu/inc/amdgpu_smu.h
+++ b/drivers/gpu/drm/amd/pm/swsmu/inc/amdgpu_smu.h
@@ -362,6 +362,27 @@ struct smu_table_context {
void *gpu_metrics_table;
};
+struct smu_context;
+struct smu_dpm_policy;
+
+struct smu_dpm_policy_desc {
+ const char *name;
+ char *(*get_desc)(struct smu_dpm_policy *dpm_policy, int level);
+};
+
+struct smu_dpm_policy {
+ struct smu_dpm_policy_desc *desc;
+ enum pp_pm_policy policy_type;
+ unsigned long level_mask;
+ int current_level;
+ int (*set_policy)(struct smu_context *ctxt, int level);
+};
+
+struct smu_dpm_policy_ctxt {
+ struct smu_dpm_policy policies[PP_PM_POLICY_NUM];
+ unsigned long policy_mask;
+};
+
struct smu_dpm_context {
uint32_t dpm_context_size;
void *dpm_context;
@@ -372,6 +393,7 @@ struct smu_dpm_context {
struct smu_power_state *dpm_request_power_state;
struct smu_power_state *dpm_current_power_state;
struct mclock_latency_table *mclk_latency_table;
+ struct smu_dpm_policy_ctxt *dpm_policies;
};
struct smu_power_gate {
@@ -1551,6 +1573,11 @@ typedef struct {
uint32_t MmHubPadding[8];
} WifiBandEntryTable_t;
+#define STR_SOC_PSTATE_POLICY "soc_pstate"
+
+struct smu_dpm_policy *smu_get_pm_policy(struct smu_context *smu,
+ enum pp_pm_policy p_type);
+
#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,
@@ -1598,5 +1625,10 @@ void amdgpu_smu_stb_debug_fs_init(struct amdgpu_device *adev);
int smu_send_hbm_bad_pages_num(struct smu_context *smu, uint32_t size);
int smu_send_hbm_bad_channel_flag(struct smu_context *smu, uint32_t size);
int smu_send_rma_reason(struct smu_context *smu);
+int smu_set_pm_policy(struct smu_context *smu, enum pp_pm_policy p_type,
+ int level);
+ssize_t smu_get_pm_policy_info(struct smu_context *smu,
+ enum pp_pm_policy p_type, char *sysbuf);
+
#endif
#endif
--
2.25.1
