drm/amd/powerplay: revise reading/writing pptable on Tonga

Change the way we store pptables in the driver to better
facilitate eventual runtime updates for debugging.

Reviewed-by: Alex Deucher <alexander.deucher@amd.com>
Signed-off-by: Eric Huang <JinHuiEric.Huang@amd.com>
Signed-off-by: Alex Deucher <alexander.deucher@amd.com>

2 files changed, 27 insertions, 12 deletions

diff --git a/drivers/gpu/drm/amd/powerplay/hwmgr/tonga_hwmgr.c b/drivers/gpu/drm/amd/powerplay/hwmgr/tonga_hwmgr.c
index 9040225bec90..28f5c65b7b4e 100644
--- a/drivers/gpu/drm/amd/powerplay/hwmgr/tonga_hwmgr.c
+++ b/drivers/gpu/drm/amd/powerplay/hwmgr/tonga_hwmgr.c
@@ -4443,17 +4443,14 @@ int tonga_reset_asic_tasks(struct pp_hwmgr *hwmgr)
 
 int tonga_hwmgr_backend_fini(struct pp_hwmgr *hwmgr)
 {
-        if (NULL != hwmgr->dyn_state.vddc_dep_on_dal_pwrl) {
-                kfree(hwmgr->dyn_state.vddc_dep_on_dal_pwrl);
-                hwmgr->dyn_state.vddc_dep_on_dal_pwrl = NULL;
-        }
+        struct tonga_hwmgr *data = (struct tonga_hwmgr *)(hwmgr->backend);
 
-        if (NULL != hwmgr->backend) {
-                kfree(hwmgr->backend);
-                hwmgr->backend = NULL;
+        if (data->soft_pp_table) {
+                kfree(data->soft_pp_table);
+                data->soft_pp_table = NULL;
         }
 
-        return 0;
+        return phm_hwmgr_backend_fini(hwmgr);
 }
 
 /**
@@ -6058,18 +6055,34 @@ static int tonga_get_pp_table(struct pp_hwmgr *hwmgr, char **table)
 {
         struct tonga_hwmgr *data = (struct tonga_hwmgr *)(hwmgr->backend);
 
-        *table = (char *)&data->smc_state_table;
+        if (!data->soft_pp_table) {
+                data->soft_pp_table = kzalloc(hwmgr->soft_pp_table_size, GFP_KERNEL);
+                if (!data->soft_pp_table)
+                        return -ENOMEM;
+                memcpy(data->soft_pp_table, hwmgr->soft_pp_table,
+                                hwmgr->soft_pp_table_size);
+        }
+
+        *table = (char *)&data->soft_pp_table;
 
-        return sizeof(struct SMU72_Discrete_DpmTable);
+        return hwmgr->soft_pp_table_size;
 }
 
 static int tonga_set_pp_table(struct pp_hwmgr *hwmgr, const char *buf, size_t size)
 {
         struct tonga_hwmgr *data = (struct tonga_hwmgr *)(hwmgr->backend);
 
-        void *table = (void *)&data->smc_state_table;
+        if (!data->soft_pp_table) {
+                data->soft_pp_table = kzalloc(hwmgr->soft_pp_table_size, GFP_KERNEL);
+                if (!data->soft_pp_table)
+                        return -ENOMEM;
+        }
+
+        memcpy(data->soft_pp_table, buf, size);
+
+        hwmgr->soft_pp_table = data->soft_pp_table;
 
-        memcpy(table, buf, size);
+        /* TODO: re-init powerplay to implement modified pptable */
 
         return 0;
 }
diff --git a/drivers/gpu/drm/amd/powerplay/hwmgr/tonga_hwmgr.h b/drivers/gpu/drm/amd/powerplay/hwmgr/tonga_hwmgr.h
index f88d3bbe6671..c6a6b4006dc1 100644
--- a/drivers/gpu/drm/amd/powerplay/hwmgr/tonga_hwmgr.h
+++ b/drivers/gpu/drm/amd/powerplay/hwmgr/tonga_hwmgr.h
@@ -353,6 +353,8 @@ struct tonga_hwmgr {
         bool                           acp_power_gated;  /* 1: gated, 0:not gated */
         bool                           pg_acp_init;
 
+        /* soft pptable for re-uploading into smu */
+        void *soft_pp_table;
 };
 
 typedef struct tonga_hwmgr tonga_hwmgr;