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A commit baa914cd81 ("firewire: add kernel API to access CYCLE_TIME
register") allow unit drivers to read CYCLE_TIME of 1394 OHCI controller.
The value expresses monotonic time with 42.195 Mhz resolution and wrapping
around every 128 seconds. The controller uses the time to govern
isochronous cycle.
This commit extends tracepoints event including the value so that event
parser can compute gap between current isochronous cycle and the latest
isochronous cycle in which packet is processed (in IR context) or scheduled
(in IT context). It loses backward compatibility to former format of the
tracepoints event.
Signed-off-by: Takashi Sakamoto <o-takashi@sakamocchi.jp>
Link: https://lore.kernel.org/r/20230109213231.138223-1-o-takashi@sakamocchi.jp
Signed-off-by: Takashi Iwai <tiwai@suse.de>
82 lines
2.6 KiB
C
82 lines
2.6 KiB
C
/* SPDX-License-Identifier: GPL-2.0-only */
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/*
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* amdtp-stream-trace.h - tracepoint definitions to dump a part of packet data
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*
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* Copyright (c) 2016 Takashi Sakamoto
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*/
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#undef TRACE_SYSTEM
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#define TRACE_SYSTEM snd_firewire_lib
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#if !defined(_AMDTP_STREAM_TRACE_H) || defined(TRACE_HEADER_MULTI_READ)
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#define _AMDTP_STREAM_TRACE_H
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#include <linux/tracepoint.h>
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TRACE_EVENT(amdtp_packet,
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TP_PROTO(const struct amdtp_stream *s, u32 cycles, const __be32 *cip_header, unsigned int payload_length, unsigned int data_blocks, unsigned int data_block_counter, unsigned int packet_index, unsigned int index, u32 curr_cycle_time),
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TP_ARGS(s, cycles, cip_header, payload_length, data_blocks, data_block_counter, packet_index, index, curr_cycle_time),
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TP_STRUCT__entry(
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__field(unsigned int, cycle_time)
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__field(unsigned int, second)
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__field(unsigned int, cycle)
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__field(int, channel)
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__field(int, src)
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__field(int, dest)
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__dynamic_array(u8, cip_header, cip_header ? 8 : 0)
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__field(unsigned int, payload_quadlets)
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__field(unsigned int, data_blocks)
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__field(unsigned int, data_block_counter)
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__field(unsigned int, packet_index)
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__field(unsigned int, irq)
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__field(unsigned int, index)
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),
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TP_fast_assign(
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__entry->cycle_time = curr_cycle_time;
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__entry->second = cycles / CYCLES_PER_SECOND;
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__entry->cycle = cycles % CYCLES_PER_SECOND;
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__entry->channel = s->context->channel;
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if (s->direction == AMDTP_IN_STREAM) {
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__entry->src = fw_parent_device(s->unit)->node_id;
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__entry->dest = fw_parent_device(s->unit)->card->node_id;
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} else {
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__entry->src = fw_parent_device(s->unit)->card->node_id;
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__entry->dest = fw_parent_device(s->unit)->node_id;
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}
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if (cip_header) {
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memcpy(__get_dynamic_array(cip_header), cip_header,
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__get_dynamic_array_len(cip_header));
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}
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__entry->payload_quadlets = payload_length / sizeof(__be32);
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__entry->data_blocks = data_blocks;
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__entry->data_block_counter = data_block_counter,
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__entry->packet_index = packet_index;
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__entry->irq = !!in_softirq();
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__entry->index = index;
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),
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TP_printk(
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"%08x %02u %04u %04x %04x %02d %03u %02u %03u %02u %01u %02u %s",
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__entry->cycle_time,
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__entry->second,
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__entry->cycle,
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__entry->src,
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__entry->dest,
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__entry->channel,
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__entry->payload_quadlets,
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__entry->data_blocks,
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__entry->data_block_counter,
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__entry->packet_index,
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__entry->irq,
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__entry->index,
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__print_array(__get_dynamic_array(cip_header),
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__get_dynamic_array_len(cip_header), 1))
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);
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#endif
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#undef TRACE_INCLUDE_PATH
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#define TRACE_INCLUDE_PATH .
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#undef TRACE_INCLUDE_FILE
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#define TRACE_INCLUDE_FILE amdtp-stream-trace
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#include <trace/define_trace.h>
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