On SOCs with SMU v13.0.6, allow changing xgmi plpd policy through
pm_policy sysfs interface.
Signed-off-by: Lijo Lazar <lijo.la...@amd.com>
Reviewed-by: Hawking Zhang <hawking.zh...@amd.com>
---
v2, v3: No change
v4: Use macro for XGMI policy type name
drivers/gpu/drm/amd/pm/swsmu/amdgpu_smu.c | 17 ++++++-
.../drm/amd/pm/swsmu/smu13/smu_v13_0_6_ppt.c | 51 +++++++++++++++++--
drivers/gpu/drm/amd/pm/swsmu/smu_cmn.c | 27 ++++++++++
drivers/gpu/drm/amd/pm/swsmu/smu_cmn.h | 1 +
4 files changed, 90 insertions(+), 6 deletions(-)
diff --git a/drivers/gpu/drm/amd/pm/swsmu/amdgpu_smu.c
b/drivers/gpu/drm/amd/pm/swsmu/amdgpu_smu.c
index df9ff377ebfd..2a8d853e6346 100644
--- a/drivers/gpu/drm/amd/pm/swsmu/amdgpu_smu.c
+++ b/drivers/gpu/drm/amd/pm/swsmu/amdgpu_smu.c
@@ -1197,6 +1197,9 @@ static void smu_swctf_delayed_work_handler(struct
work_struct *work)
static void smu_init_xgmi_plpd_mode(struct smu_context *smu)
{
+ struct smu_dpm_context *dpm_ctxt = &(smu->smu_dpm);
+ struct smu_dpm_policy_ctxt *policy_ctxt;
+
if (amdgpu_ip_version(smu->adev, MP1_HWIP, 0) == IP_VERSION(11, 0, 2)) {
smu->plpd_mode = XGMI_PLPD_DEFAULT;
return;
@@ -1204,10 +1207,20 @@ static void smu_init_xgmi_plpd_mode(struct smu_context
*smu)
/* PMFW put PLPD into default policy after enabling the feature */
if (smu_feature_is_enabled(smu,
- SMU_FEATURE_XGMI_PER_LINK_PWR_DWN_BIT))
+ SMU_FEATURE_XGMI_PER_LINK_PWR_DWN_BIT)) {
+ struct smu_dpm_policy *policy;
+
smu->plpd_mode = XGMI_PLPD_DEFAULT;
- else
+ policy = smu_get_pm_policy(smu, PP_PM_POLICY_XGMI_PLPD);
+ if (policy)
+ policy->current_level = XGMI_PLPD_DEFAULT;
+ } else {
smu->plpd_mode = XGMI_PLPD_NONE;
+ policy_ctxt = dpm_ctxt->dpm_policies;
+ if (policy_ctxt)
+ policy_ctxt->policy_mask &=
+ ~BIT(PP_PM_POLICY_XGMI_PLPD);
+ }
}
static int smu_sw_init(void *handle)
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 0ed0b5326d35..173c5599279b 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
@@ -403,9 +403,45 @@ static int smu_v13_0_6_select_policy_soc_pstate(struct
smu_context *smu,
return ret;
}
+static int smu_v13_0_6_select_plpd_policy(struct smu_context *smu, int level)
+{
+ struct amdgpu_device *adev = smu->adev;
+ int ret, param;
+
+ switch (level) {
+ case XGMI_PLPD_DEFAULT:
+ param = PPSMC_PLPD_MODE_DEFAULT;
+ break;
+ case XGMI_PLPD_OPTIMIZED:
+ param = PPSMC_PLPD_MODE_OPTIMIZED;
+ break;
+ case XGMI_PLPD_DISALLOW:
+ param = 0;
+ break;
+ default:
+ return -EINVAL;
+ }
+
+ if (level == XGMI_PLPD_DISALLOW)
+ ret = smu_cmn_send_smc_msg_with_param(
+ smu, SMU_MSG_GmiPwrDnControl, param, NULL);
+ else
+ /* change xgmi per-link power down policy */
+ ret = smu_cmn_send_smc_msg_with_param(
+ smu, SMU_MSG_SelectPLPDMode, param, NULL);
+
+ if (ret)
+ dev_err(adev->dev,
+ "select xgmi per-link power down policy %d failed\n",
+ level);
+
+ return ret;
+}
+
static int smu_v13_0_6_allocate_dpm_context(struct smu_context *smu)
{
struct smu_dpm_context *smu_dpm = &smu->smu_dpm;
+ struct smu_dpm_policy *policy;
smu_dpm->dpm_context =
kzalloc(sizeof(struct smu_13_0_dpm_context), GFP_KERNEL);
@@ -413,11 +449,9 @@ static int smu_v13_0_6_allocate_dpm_context(struct
smu_context *smu)
return -ENOMEM;
smu_dpm->dpm_context_size = sizeof(struct smu_13_0_dpm_context);
+ smu_dpm->dpm_policies =
+ kzalloc(sizeof(struct smu_dpm_policy_ctxt), GFP_KERNEL);
if (!(smu->adev->flags & AMD_IS_APU)) {
- struct smu_dpm_policy *policy;
-
- smu_dpm->dpm_policies =
- kzalloc(sizeof(struct smu_dpm_policy_ctxt), GFP_KERNEL);
policy = &(smu_dpm->dpm_policies->policies[0]);
policy->policy_type = PP_PM_POLICY_SOC_PSTATE;
@@ -430,6 +464,15 @@ static int smu_v13_0_6_allocate_dpm_context(struct
smu_context *smu)
smu_dpm->dpm_policies->policy_mask |=
BIT(PP_PM_POLICY_SOC_PSTATE);
}
+ policy = &(smu_dpm->dpm_policies->policies[1]);
+
+ policy->policy_type = PP_PM_POLICY_XGMI_PLPD;
+ policy->level_mask = BIT(XGMI_PLPD_DISALLOW) | BIT(XGMI_PLPD_DEFAULT) |
+ BIT(XGMI_PLPD_OPTIMIZED);
+ policy->current_level = XGMI_PLPD_DEFAULT;
+ policy->set_policy = smu_v13_0_6_select_plpd_policy;
+ smu_cmn_generic_plpd_policy_desc(policy);
+ smu_dpm->dpm_policies->policy_mask |= BIT(PP_PM_POLICY_XGMI_PLPD);
return 0;
}
diff --git a/drivers/gpu/drm/amd/pm/swsmu/smu_cmn.c
b/drivers/gpu/drm/amd/pm/swsmu/smu_cmn.c
index 27e4a97411cf..5592fd825aa3 100644
--- a/drivers/gpu/drm/amd/pm/swsmu/smu_cmn.c
+++ b/drivers/gpu/drm/amd/pm/swsmu/smu_cmn.c
@@ -1162,3 +1162,30 @@ void smu_cmn_generic_soc_policy_desc(struct
smu_dpm_policy *policy)
policy->desc = &pstate_policy_desc;
}
+static char *smu_xgmi_plpd_policy_get_desc(struct smu_dpm_policy *policy,
+ int level)
+{
+ if (level < 0 || !(policy->level_mask & BIT(level)))
+ return "Invalid";
+
+ switch (level) {
+ case XGMI_PLPD_DISALLOW:
+ return "plpd_disallow";
+ case XGMI_PLPD_DEFAULT:
+ return "plpd_default";
+ case XGMI_PLPD_OPTIMIZED:
+ return "plpd_optimized";
+ }
+
+ return "Invalid";
+}
+
+static struct smu_dpm_policy_desc xgmi_plpd_policy_desc = {
+ .name = STR_XGMI_PLPD_POLICY,
+ .get_desc = smu_xgmi_plpd_policy_get_desc,
+};
+
+void smu_cmn_generic_plpd_policy_desc(struct smu_dpm_policy *policy)
+{
+ policy->desc = &xgmi_plpd_policy_desc;
+}
diff --git a/drivers/gpu/drm/amd/pm/swsmu/smu_cmn.h
b/drivers/gpu/drm/amd/pm/swsmu/smu_cmn.h
index d135d984329e..1de685defe85 100644
--- a/drivers/gpu/drm/amd/pm/swsmu/smu_cmn.h
+++ b/drivers/gpu/drm/amd/pm/swsmu/smu_cmn.h
@@ -145,6 +145,7 @@ static inline void smu_cmn_get_sysfs_buf(char **buf, int
*offset)
bool smu_cmn_is_audio_func_enabled(struct amdgpu_device *adev);
void smu_cmn_generic_soc_policy_desc(struct smu_dpm_policy *policy);
+void smu_cmn_generic_plpd_policy_desc(struct smu_dpm_policy *policy);
#endif
#endif
--
2.25.1
