st_msg_header
struct st_msg_header *msg_h;
msg_h = (struct st_msg_header *)hba->dma_mem;
struct st_msg_header *msg_h;
msg_h = (struct st_msg_header *)req - 1;
hba->req_head * hba->rq_size + sizeof(struct st_msg_header));
struct st_msg_header *msg_h;
msg_h = (struct st_msg_header *)req - 1;