s390/cio/qdio_main.c

205 static inline int get_buf_states(struct qdio_q *q, unsigned int bufnr,
213 		return qdio_do_eqbs(q, state, bufnr, count, auto_ack);
216 	__state = q->slsb.val[bufnr];
223 		bufnr = next_buf(bufnr);
226 		if (q->slsb.val[bufnr] != __state)
235 static inline int get_buf_state(struct qdio_q *q, unsigned int bufnr,
238 	return get_buf_states(q, bufnr, state, 1, auto_ack);
242 static inline int set_buf_states(struct qdio_q *q, int bufnr,
248 		return qdio_do_sqbs(q, state, bufnr, count);
254 		WRITE_ONCE(q->slsb.val[bufnr], state);
255 		bufnr = next_buf(bufnr);
264 static inline int set_buf_state(struct qdio_q *q, int bufnr,
267 	return set_buf_states(q, bufnr, state, 1);
384 int debug_get_buf_state(struct qdio_q *q, unsigned int bufnr,
389 	return get_buf_state(q, bufnr, state, 0);
502 			     unsigned int *bufnr, unsigned int *error)
520 	*bufnr = start;
606 			      unsigned int *bufnr, unsigned int *error)
624 	*bufnr = start;
1207  * @bufnr: first buffer to process
1210 static int handle_inbound(struct qdio_q *q, int bufnr, int count)
1217 	overlap = min_t(int, count - sub_buf(q->u.in.batch_start, bufnr),
1224 	count = set_buf_states(q, bufnr, SLSB_CU_INPUT_EMPTY, count);
1237  * @bufnr: buffer number
1241 				 unsigned int bufnr, unsigned int count)
1245 	if (bufnr >= QDIO_MAX_BUFFERS_PER_Q || count > QDIO_MAX_BUFFERS_PER_Q)
1251 	DBF_DEV_EVENT(DBF_INFO, irq_ptr, "addi b:%02x c:%02x", bufnr, count);
1258 	return handle_inbound(irq_ptr->input_qs[q_nr], bufnr, count);
1265  * @bufnr: first buffer to process
1269 static int handle_outbound(struct qdio_q *q, unsigned int bufnr, unsigned int count,
1277 	count = set_buf_states(q, bufnr, SLSB_CU_OUTPUT_PRIMED, count);
1291 		   get_buf_state(q, prev_buf(bufnr), &state, 0) > 0 &&
1306  * @bufnr: buffer number
1311 				  unsigned int bufnr, unsigned int count,
1316 	if (bufnr >= QDIO_MAX_BUFFERS_PER_Q || count > QDIO_MAX_BUFFERS_PER_Q)
1322 	DBF_DEV_EVENT(DBF_INFO, irq_ptr, "addo b:%02x c:%02x", bufnr, count);
1329 	return handle_outbound(irq_ptr->output_qs[q_nr], bufnr, count, aob);