1 files changed, 77 insertions, 0 deletions
diff --git a/drivers/gpu/drm/amd/amdgpu/amdgpu_atomfirmware.c b/drivers/gpu/drm/amd/amdgpu/amdgpu_atomfirmware.c
index 636385c80f64..7f4751e5caaf 100644
--- a/drivers/gpu/drm/amd/amdgpu/amdgpu_atomfirmware.c
+++ b/drivers/gpu/drm/amd/amdgpu/amdgpu_atomfirmware.c
@@ -296,6 +296,83 @@ static int convert_atom_mem_type_to_vram_type(struct amdgpu_device *adev,
 	return vram_type;
 }
 
+static int amdgpu_atomfirmware_get_uma_carveout_info_v2_3(struct amdgpu_device *adev,
+							  union igp_info *igp_info,
+							  struct amdgpu_uma_carveout_info *uma_info)
+{
+	struct uma_carveout_option *opts;
+	uint8_t nr_uma_options;
+	int i;
+
+	nr_uma_options = igp_info->v23.UMACarveoutIndexMax;
+
+	if (!nr_uma_options)
+		return -ENODEV;
+
+	if (nr_uma_options > MAX_UMA_OPTION_ENTRIES) {
+		drm_dbg(adev_to_drm(adev),
+			"Number of UMA options exceeds max table size. Options will not be parsed");
+		return -EINVAL;
+	}
+
+	uma_info->num_entries = nr_uma_options;
+	uma_info->uma_option_index = igp_info->v23.UMACarveoutIndex;
+
+	opts = igp_info->v23.UMASizeControlOption;
+
+	for (i = 0; i < nr_uma_options; i++) {
+		if (!opts[i].memoryCarvedGb)
+			uma_info->entries[i].memory_carved_mb = 512;
+		else
+			uma_info->entries[i].memory_carved_mb = (uint32_t)opts[i].memoryCarvedGb << 10;
+
+		uma_info->entries[i].flags = opts[i].uma_carveout_option_flags.all8;
+		strscpy(uma_info->entries[i].name, opts[i].optionName, MAX_UMA_OPTION_NAME);
+	}
+
+	return 0;
+}
+
+int amdgpu_atomfirmware_get_uma_carveout_info(struct amdgpu_device *adev,
+					      struct amdgpu_uma_carveout_info *uma_info)
+{
+	struct amdgpu_mode_info *mode_info = &adev->mode_info;
+	union igp_info *igp_info;
+	u16 data_offset, size;
+	u8 frev, crev;
+	int index;
+
+	if (!(adev->flags & AMD_IS_APU))
+		return -ENODEV;
+
+	index = get_index_into_master_table(atom_master_list_of_data_tables_v2_1,
+					    integratedsysteminfo);
+
+	if (!amdgpu_atom_parse_data_header(mode_info->atom_context,
+					  index, &size,
+					  &frev, &crev, &data_offset)) {
+		return -EINVAL;
+	}
+
+	igp_info = (union igp_info *)
+			(mode_info->atom_context->bios + data_offset);
+
+	switch (frev) {
+	case 2:
+		switch (crev) {
+		case 3:
+			return amdgpu_atomfirmware_get_uma_carveout_info_v2_3(adev, igp_info, uma_info);
+		break;
+		default:
+			break;
+		}
+		break;
+	default:
+		break;
+	}
+	return -ENODEV;
+}
+
 int
 amdgpu_atomfirmware_get_vram_info(struct amdgpu_device *adev,
 				  int *vram_width, int *vram_type,