pldmfw: enable selected component update

This patch enables to update a selected component from PLDM image containing multiple components. Example usage: struct pldmfw; data.mode = PLDMFW_UPDATE_MODE_SINGLE_COMPONENT; data.compontent_identifier = DRIVER_FW_MGMT_COMPONENT_ID; Reviewed-by: Jacob Keller <[email protected]> Reviewed-by: Marcin Szycik <[email protected]> Reviewed-by: Przemek Kitszel <[email protected]> Signed-off-by: Konrad Knitter <[email protected]> Tested-by: Pucha Himasekhar Reddy <[email protected]> (A Contingent worker at Intel) Signed-off-by: Tony Nguyen <[email protected]>
kdave · Jan 16, 2025 · d4679b7 · d4679b7
1 parent b44e27b
commit d4679b7
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diff --git a/include/linux/pldmfw.h b/include/linux/pldmfw.h
@@ -125,9 +125,17 @@ struct pldmfw_ops;
  * a pointer to their own data, used to implement the device specific
  * operations.
  */
+
+enum pldmfw_update_mode {
+	PLDMFW_UPDATE_MODE_FULL,
+	PLDMFW_UPDATE_MODE_SINGLE_COMPONENT,
+};
+
 struct pldmfw {
 	const struct pldmfw_ops *ops;
 	struct device *dev;
+	u16 component_identifier;
+	enum pldmfw_update_mode mode;
 };
 
 bool pldmfw_op_pci_match_record(struct pldmfw *context, struct pldmfw_record *record);

diff --git a/lib/pldmfw/pldmfw.c b/lib/pldmfw/pldmfw.c
@@ -481,9 +481,17 @@ static int pldm_parse_components(struct pldmfw_priv *data)
 		component->component_data = data->fw->data + offset;
 		component->component_size = size;
 
+		if (data->context->mode == PLDMFW_UPDATE_MODE_SINGLE_COMPONENT &&
+		    data->context->component_identifier != component->identifier)
+			continue;
+
 		list_add_tail(&component->entry, &data->components);
 	}
 
+	if (data->context->mode == PLDMFW_UPDATE_MODE_SINGLE_COMPONENT &&
+	    list_empty(&data->components))
+		return -ENOENT;
+
 	header_crc_ptr = data->fw->data + data->offset;
 
 	err = pldm_move_fw_offset(data, sizeof(data->header_crc));