In reply to uvmsd:
REQ_NUM_WORDS represents packet size. I want to send faulty packets(sending the packets with less or more than the standard size). The packet size is set by the sequence and i have added a field in the seq_item. Using this field REQ_NUM_WORDS(packet size), the driver generates cs(chip_select) accordingly.
Why can’t your monitor infer the packet size based on the cs signal? No need to tell the monitor anything.