823 	u32 cmd_head;  in is_ring_space_avail()  local
827 	cmd_head = mb->cmd_head % udev->cmdr_size; /* UAM */  in is_ring_space_avail()
833 	if (head_to_end(cmd_head, udev->cmdr_size) >= cmd_size)  in is_ring_space_avail()
836 		cmd_needed = cmd_size + head_to_end(cmd_head, udev->cmdr_size);  in is_ring_space_avail()
838 	space = spc_free(cmd_head, udev->cmdr_last_cleaned, udev->cmdr_size);  in is_ring_space_avail()
840 		pr_debug("no cmd space: %u %u %u\n", cmd_head,  in is_ring_space_avail()
958 	uint32_t cmd_head = mb->cmd_head % udev->cmdr_size; /* UAM */  in ring_insert_padding()  local
961 	if (head_to_end(cmd_head, udev->cmdr_size) < cmd_size) {  in ring_insert_padding()
962 		size_t pad_size = head_to_end(cmd_head, udev->cmdr_size);  in ring_insert_padding()
964 		hdr = udev->cmdr + cmd_head;  in ring_insert_padding()
972 		UPDATE_HEAD(mb->cmd_head, pad_size, udev->cmdr_size);  in ring_insert_padding()
975 		cmd_head = mb->cmd_head % udev->cmdr_size; /* UAM */  in ring_insert_padding()
976 		WARN_ON(cmd_head != 0);  in ring_insert_padding()
979 	return cmd_head;  in ring_insert_padding()
1020 	uint32_t cmd_id, cmd_head;  in queue_cmd_ring()  local
1087 	cmd_head = ring_insert_padding(udev, command_size);  in queue_cmd_ring()
1089 	entry = udev->cmdr + cmd_head;  in queue_cmd_ring()
1119 	cdb_off = CMDR_OFF + cmd_head + base_command_size;  in queue_cmd_ring()
1124 	UPDATE_HEAD(mb->cmd_head, command_size, udev->cmdr_size);  in queue_cmd_ring()
1163 	uint32_t cmd_head;  in queue_tmr_ring()  local
1179 	cmd_head = ring_insert_padding(udev, cmd_size);  in queue_tmr_ring()
1181 	entry = udev->cmdr + cmd_head;  in queue_tmr_ring()
1190 	UPDATE_HEAD(mb->cmd_head, cmd_size, udev->cmdr_size);  in queue_tmr_ring()
2403 		 mb->cmd_tail, mb->cmd_head);  in tcmu_reset_ring()
2407 	mb->cmd_head = 0;  in tcmu_reset_ring()