static void fw_fill_request()

in core-transaction.c [198:270]

• 64 lines of code
• 8 McCabe index (conditional complexity)

static void fw_fill_request(struct fw_packet *packet, int tcode, int tlabel,
		int destination_id, int source_id, int generation, int speed,
		unsigned long long offset, void *payload, size_t length)
{
	int ext_tcode;

	if (tcode == TCODE_STREAM_DATA) {
		packet->header[0] =
			HEADER_DATA_LENGTH(length) |
			destination_id |
			HEADER_TCODE(TCODE_STREAM_DATA);
		packet->header_length = 4;
		packet->payload = payload;
		packet->payload_length = length;

		goto common;
	}

	if (tcode > 0x10) {
		ext_tcode = tcode & ~0x10;
		tcode = TCODE_LOCK_REQUEST;
	} else
		ext_tcode = 0;

	packet->header[0] =
		HEADER_RETRY(RETRY_X) |
		HEADER_TLABEL(tlabel) |
		HEADER_TCODE(tcode) |
		HEADER_DESTINATION(destination_id);
	packet->header[1] =
		HEADER_OFFSET_HIGH(offset >> 32) | HEADER_SOURCE(source_id);
	packet->header[2] =
		offset;

	switch (tcode) {
	case TCODE_WRITE_QUADLET_REQUEST:
		packet->header[3] = *(u32 *)payload;
		packet->header_length = 16;
		packet->payload_length = 0;
		break;

	case TCODE_LOCK_REQUEST:
	case TCODE_WRITE_BLOCK_REQUEST:
		packet->header[3] =
			HEADER_DATA_LENGTH(length) |
			HEADER_EXTENDED_TCODE(ext_tcode);
		packet->header_length = 16;
		packet->payload = payload;
		packet->payload_length = length;
		break;

	case TCODE_READ_QUADLET_REQUEST:
		packet->header_length = 12;
		packet->payload_length = 0;
		break;

	case TCODE_READ_BLOCK_REQUEST:
		packet->header[3] =
			HEADER_DATA_LENGTH(length) |
			HEADER_EXTENDED_TCODE(ext_tcode);
		packet->header_length = 16;
		packet->payload_length = 0;
		break;

	default:
		WARN(1, "wrong tcode %d\n", tcode);
	}
 common:
	packet->speed = speed;
	packet->generation = generation;
	packet->ack = 0;
	packet->payload_mapped = false;
}