cmd_head
{ "head", "-num|-n num", "limit number of elements in pipe", cmd_head,
list_node_t **cmd_head, struct pqi_cmd *cmdp)
cmd_head);
iprb_dma_t *ncb = &ip->cmds[ip->cmd_head];
ip->cmd_last = ip->cmd_head;
ip->cmd_head++;
ip->cmd_head %= NUM_TX;
return (&ip->cmds[ip->cmd_head]);
ip->cmd_head = ip->cmd_tail = 0;
uint16_t cmd_head;
ctrl->cmd_head = 0;
ctrl->cmd_head);
ctrl->cmd_head, loop);
ctrl->cmd_tail, ctrl->cmd_head);
off = MOD_DEC(ctrl->cmd_head, sizeof(struct amdvi_cmd),
softc->total_cmd, ctrl->cmd_tail, ctrl->cmd_head);
result = softc->ctrl->cmd_head;
uint32_t cmd_head:19;