drm/amd/powerplay: enable SMC message filter

1. enable SMC message filter in SRIOV situation
2. return -EACCESS if msg is blocked from smu_msg_get_index
3. if msg is block, always return 0 from smu_v11_0_send_msg_with_param
Signed-off-by: Wenhui Sheng <Wenhui.Sheng@amd.com>
Reviewed-by: Hawking Zhang <Hawking.Zhang@amd.com>
Reviewed-by: Kevin Wang <kevin1.wang@amd.com>
Signed-off-by: Alex Deucher <alexander.deucher@amd.com>

drivers/gpu/drm/amd/powerplay/arcturus_ppt.c

@@ -208,6 +208,9 @@ static int arcturus_get_smu_msg_index(struct smu_context *smc, uint32_t index)
 	if (!(mapping.valid_mapping))
 		return -EINVAL;
 
+	if (amdgpu_sriov_vf(smc->adev) && !mapping.valid_in_vf)
+		return -EACCES;
+
 	return mapping.map_to;
 }
 
@@ -382,11 +385,6 @@ arcturus_set_single_dpm_table(struct smu_context *smu,
 		return ret;
 	}
 
-	if (!num_of_levels) {
-		pr_err("[%s] number of clk levels is invalid!\n", __func__);
-		return -EINVAL;
-	}
-
 	single_dpm_table->count = num_of_levels;
 	for (i = 0; i < num_of_levels; i++) {
 		ret = smu_send_smc_msg_with_param(smu,
@@ -397,10 +395,6 @@ arcturus_set_single_dpm_table(struct smu_context *smu,
 			pr_err("[%s] failed to get dpm freq by index!\n", __func__);
 			return ret;
 		}
-		if (!clk) {
-			pr_err("[%s] clk value is invalid!\n", __func__);
-			return -EINVAL;
-		}
 		single_dpm_table->dpm_levels[i].value = clk;
 		single_dpm_table->dpm_levels[i].enabled = true;
 	}

drivers/gpu/drm/amd/powerplay/navi10_ppt.c

@@ -228,6 +228,9 @@ static int navi10_get_smu_msg_index(struct smu_context *smc, uint32_t index)
 		return -EINVAL;
 	}
 
+	if (amdgpu_sriov_vf(smc->adev) && !mapping.valid_in_vf)
+		return -EACCES;
+
 	return mapping.map_to;
 }
 

drivers/gpu/drm/amd/powerplay/smu_v11_0.c

@@ -100,7 +100,7 @@ smu_v11_0_send_msg_with_param(struct smu_context *smu,
 
 	index = smu_msg_get_index(smu, msg);
 	if (index < 0)
-		return index;
+		return index == -EACCES ? 0 : index;
 
 	mutex_lock(&smu->message_lock);
 	ret = smu_v11_0_wait_for_response(smu);