231 	// of syt interval. This comes from the interval of isoc cycle. As 1394  in amdtp_stream_add_pcm_hw_constraints()
484 static unsigned int compute_syt_offset(unsigned int syt, unsigned int cycle,  in compute_syt_offset()  argument
487 	unsigned int cycle_lo = (cycle % CYCLES_PER_SECOND) & 0x0f;  in compute_syt_offset()
534 			dst->syt_offset = compute_syt_offset(src->syt, src->cycle, transfer_delay);  in cache_seq()
705 static void build_it_pkt_header(struct amdtp_stream *s, unsigned int cycle,  in build_it_pkt_header()  argument
725 	trace_amdtp_packet(s, cycle, cip_header, payload_length + header_length, data_blocks,  in build_it_pkt_header()
828 static int parse_ir_ctx_header(struct amdtp_stream *s, unsigned int cycle,  in parse_ir_ctx_header()  argument
863 			// Handle the cycle so that empty packet arrives.  in parse_ir_ctx_header()
877 	trace_amdtp_packet(s, cycle, cip_header, payload_length, *data_blocks,  in parse_ir_ctx_header()
897 static inline u32 increment_ohci_cycle_count(u32 cycle, unsigned int addend)  in increment_ohci_cycle_count()  argument
899 	cycle += addend;  in increment_ohci_cycle_count()
900 	if (cycle >= OHCI_SECOND_MODULUS * CYCLES_PER_SECOND)  in increment_ohci_cycle_count()
901 		cycle -= OHCI_SECOND_MODULUS * CYCLES_PER_SECOND;  in increment_ohci_cycle_count()
902 	return cycle;  in increment_ohci_cycle_count()
923 // Align to actual cycle count for the packet which is going to be scheduled.
924 // This module queued the same number of isochronous cycle as the size of queue
925 // to kip isochronous cycle, therefore it's OK to just increment the cycle by
926 // the size of queue for scheduled cycle.
930 	u32 cycle = compute_ohci_cycle_count(ctx_header_tstamp);  in compute_ohci_it_cycle()  local
931 	return increment_ohci_cycle_count(cycle, queue_size);  in compute_ohci_it_cycle()
951 		unsigned int cycle;  in generate_tx_packet_descs()  local
956 		cycle = compute_ohci_cycle_count(ctx_header[1]);  in generate_tx_packet_descs()
957 		lost = (next_cycle != cycle);  in generate_tx_packet_descs()
960 				// Fireface skips transmission just for an isoc cycle corresponding  in generate_tx_packet_descs()
965 				lost = (next_cycle != cycle);  in generate_tx_packet_descs()
967 					// Prepare a description for the skipped cycle for  in generate_tx_packet_descs()
969 					desc->cycle = prev_cycle;  in generate_tx_packet_descs()
983 				lost = (compare_ohci_cycle_count(safe_cycle, cycle) < 0);  in generate_tx_packet_descs()
986 				dev_err(&s->unit->device, "Detect discontinuity of cycle: %d %d\n",  in generate_tx_packet_descs()
987 					next_cycle, cycle);  in generate_tx_packet_descs()
992 		err = parse_ir_ctx_header(s, cycle, ctx_header, &data_blocks, &dbc, &syt,  in generate_tx_packet_descs()
997 		desc->cycle = cycle;  in generate_tx_packet_descs()
1019 static unsigned int compute_syt(unsigned int syt_offset, unsigned int cycle,  in compute_syt()  argument
1025 	syt = ((cycle + syt_offset / TICKS_PER_CYCLE) << 12) |  in compute_syt()
1046 		desc->cycle = compute_ohci_it_cycle(*ctx_header, s->queue_size);  in generate_rx_packet_descs()
1049 			desc->syt = compute_syt(seq->syt_offset, desc->cycle, s->transfer_delay);  in generate_rx_packet_descs()
1106 	latest_cycle = desc->cycle;  in compute_pcm_extra_delay()
1112 	// Compute cycle count with lower 3 bits of second field and cycle field like timestamp  in compute_pcm_extra_delay()
1117 		// NOTE: The AMDTP packet descriptor should be for the past isochronous cycle since  in compute_pcm_extra_delay()
1125 		// the most recent isochronous cycle has been already processed.  in compute_pcm_extra_delay()
1131 		// NOTE: The AMDTP packet descriptor should be for the future isochronous cycle  in compute_pcm_extra_delay()
1218 		build_it_pkt_header(s, desc->cycle, template, pkt_header_length,  in process_rx_packets()
1249 	unsigned int cycle;  in skip_rx_packets()  local
1257 	cycle = compute_ohci_it_cycle(ctx_header[packets - 1], s->queue_size);  in skip_rx_packets()
1258 	s->next_cycle = increment_ohci_cycle_count(cycle, 1);  in skip_rx_packets()
1294 		unsigned int cycle = compute_ohci_it_cycle(ctx_header[offset], queue_size);  in process_rx_packets_intermediately()  local
1296 		if (compare_ohci_cycle_count(cycle, d->processing_cycle.rx_start) >= 0)  in process_rx_packets_intermediately()
1384 	unsigned int cycle;  in drop_tx_packets()  local
1393 	cycle = compute_ohci_cycle_count(ctx_header[1]);  in drop_tx_packets()
1394 	s->next_cycle = increment_ohci_cycle_count(cycle, 1);  in drop_tx_packets()
1423 		unsigned int cycle = compute_ohci_cycle_count(ctx_header[1]);  in process_tx_packets_intermediately()  local
1425 		if (compare_ohci_cycle_count(cycle, d->processing_cycle.tx_start) >= 0)  in process_tx_packets_intermediately()
1515 	// Decide the cycle count to begin processing content of packet in IR contexts.  in drop_tx_packets_initially()
1519 		unsigned int cycle = UINT_MAX;  in drop_tx_packets_initially()  local
1538 				if (cycle == UINT_MAX ||  in drop_tx_packets_initially()
1539 				    compare_ohci_cycle_count(next_cycle, cycle) > 0)  in drop_tx_packets_initially()
1540 					cycle = next_cycle;  in drop_tx_packets_initially()
1545 			d->processing_cycle.tx_start = cycle;  in drop_tx_packets_initially()
1627 	// Decide the cycle count to begin processing content of packet in IT contexts. All of IT  in irq_target_callback_skip()
1630 		unsigned int cycle = s->next_cycle;  in irq_target_callback_skip()  local
1635 			if (compare_ohci_cycle_count(s->next_cycle, cycle) > 0)  in irq_target_callback_skip()
1636 				cycle = s->next_cycle;  in irq_target_callback_skip()
1644 		d->processing_cycle.rx_start = cycle;  in irq_target_callback_skip()
1907 	// Process isochronous packets for recent isochronous cycle to handle  in amdtp_domain_stream_pcm_ack()