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firewire: core: add tracepoints events for asynchronous outbound request
In a view of core transaction service, the asynchronous outbound request
consists of two stages; initiation and completion. This commit adds a pair
of event for them.
The following example is for asynchronous lock request with compare_swap
code to offset 0x'ffff'f000'0904 in node 0xffc0.
async_request_outbound_initiate: \
transaction=0xffff955fc6a07a10 generation=5 scode=2 dst_id=0xffc0 \
tlabel=54 tcode=9 src_id=0xffc1 offset=0xfffff0000904 \
header={0xffc0d990,0xffc1ffff,0xf0000904,0x80002}
data={0x80,0x940181}
async_request_outbound_complete: \
transaction=0xffff955fc6a07a10 generation=5 scode=2 status=2 \
timestamp=0xd887
Link: https://lore.kernel.org/r/20240429043218.609398-3-o-takashi@sakamocchi.jp
Signed-off-by: Takashi Sakamoto <o-takashi@sakamocchi.jp>
This commit is contained in:
Takashi Sakamoto
parent
57614c2884
commit
944b06840a
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@ -29,6 +29,7 @@
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#include <asm/byteorder.h>
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#include "core.h"
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#include <trace/events/firewire.h>
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#include "packet-header-definitions.h"
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#define HEADER_DESTINATION_IS_BROADCAST(header) \
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@ -173,6 +174,9 @@ static void transmit_complete_callback(struct fw_packet *packet,
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struct fw_transaction *t =
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container_of(packet, struct fw_transaction, packet);
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trace_async_request_outbound_complete((uintptr_t)t, packet->generation, packet->speed,
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status, packet->timestamp);
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switch (status) {
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case ACK_COMPLETE:
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close_transaction(t, card, RCODE_COMPLETE, packet->timestamp);
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@ -394,6 +398,9 @@ void __fw_send_request(struct fw_card *card, struct fw_transaction *t, int tcode
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spin_unlock_irqrestore(&card->lock, flags);
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trace_async_request_outbound_initiate((uintptr_t)t, generation, speed, t->packet.header, payload,
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tcode_is_read_request(tcode) ? 0 : length / 4);
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card->driver->send_request(card, &t->packet);
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}
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EXPORT_SYMBOL_GPL(__fw_send_request);
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@ -7,8 +7,109 @@
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#define _FIREWIRE_TRACE_EVENT_H
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#include <linux/tracepoint.h>
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#include <linux/firewire.h>
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// Placeholder for future use.
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#include <linux/firewire-constants.h>
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#include "../../../drivers/firewire/packet-header-definitions.h"
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// The content of TP_printk field is preprocessed, then put to the module binary.
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#define ASYNC_HEADER_GET_DESTINATION(header) \
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(((header)[0] & ASYNC_HEADER_Q0_DESTINATION_MASK) >> ASYNC_HEADER_Q0_DESTINATION_SHIFT)
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#define ASYNC_HEADER_GET_TLABEL(header) \
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(((header)[0] & ASYNC_HEADER_Q0_TLABEL_MASK) >> ASYNC_HEADER_Q0_TLABEL_SHIFT)
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#define ASYNC_HEADER_GET_TCODE(header) \
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(((header)[0] & ASYNC_HEADER_Q0_TCODE_MASK) >> ASYNC_HEADER_Q0_TCODE_SHIFT)
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#define ASYNC_HEADER_GET_SOURCE(header) \
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(((header)[1] & ASYNC_HEADER_Q1_SOURCE_MASK) >> ASYNC_HEADER_Q1_SOURCE_SHIFT)
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#define ASYNC_HEADER_GET_OFFSET(header) \
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((((unsigned long long)((header)[1] & ASYNC_HEADER_Q1_OFFSET_HIGH_MASK)) >> ASYNC_HEADER_Q1_OFFSET_HIGH_SHIFT) << 32)| \
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(header)[2]
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#define QUADLET_SIZE 4
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DECLARE_EVENT_CLASS(async_outbound_initiate_template,
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TP_PROTO(u64 transaction, unsigned int generation, unsigned int scode, const u32 *header, const u32 *data, unsigned int data_count),
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TP_ARGS(transaction, generation, scode, header, data, data_count),
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TP_STRUCT__entry(
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__field(u64, transaction)
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__field(u8, generation)
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__field(u8, scode)
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__array(u32, header, ASYNC_HEADER_QUADLET_COUNT)
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__dynamic_array(u32, data, data_count)
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),
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TP_fast_assign(
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__entry->transaction = transaction;
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__entry->generation = generation;
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__entry->scode = scode;
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memcpy(__entry->header, header, QUADLET_SIZE * ASYNC_HEADER_QUADLET_COUNT);
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memcpy(__get_dynamic_array(data), data, __get_dynamic_array_len(data));
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),
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// This format is for the request subaction.
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TP_printk(
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"transaction=0x%llx generation=%u scode=%u dst_id=0x%04x tlabel=%u tcode=%u src_id=0x%04x offset=0x%012llx header=%s data=%s",
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__entry->transaction,
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__entry->generation,
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__entry->scode,
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ASYNC_HEADER_GET_DESTINATION(__entry->header),
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ASYNC_HEADER_GET_TLABEL(__entry->header),
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ASYNC_HEADER_GET_TCODE(__entry->header),
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ASYNC_HEADER_GET_SOURCE(__entry->header),
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ASYNC_HEADER_GET_OFFSET(__entry->header),
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__print_array(__entry->header, ASYNC_HEADER_QUADLET_COUNT, QUADLET_SIZE),
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__print_array(__get_dynamic_array(data),
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__get_dynamic_array_len(data) / QUADLET_SIZE, QUADLET_SIZE)
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)
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);
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// The value of status is one of ack codes and rcodes specific to Linux FireWire subsystem.
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DECLARE_EVENT_CLASS(async_outbound_complete_template,
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TP_PROTO(u64 transaction, unsigned int generation, unsigned int scode, unsigned int status, unsigned int timestamp),
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TP_ARGS(transaction, generation, scode, status, timestamp),
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TP_STRUCT__entry(
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__field(u64, transaction)
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__field(u8, generation)
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__field(u8, scode)
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__field(u8, status)
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__field(u16, timestamp)
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),
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TP_fast_assign(
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__entry->transaction = transaction;
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__entry->generation = generation;
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__entry->scode = scode;
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__entry->status = status;
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__entry->timestamp = timestamp;
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),
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TP_printk(
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"transaction=0x%llx generation=%u scode=%u status=%u timestamp=0x%04x",
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__entry->transaction,
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__entry->generation,
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__entry->scode,
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__entry->status,
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__entry->timestamp
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)
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);
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DEFINE_EVENT(async_outbound_initiate_template, async_request_outbound_initiate,
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TP_PROTO(u64 transaction, unsigned int generation, unsigned int scode, const u32 *header, const u32 *data, unsigned int data_count),
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TP_ARGS(transaction, generation, scode, header, data, data_count)
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);
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DEFINE_EVENT(async_outbound_complete_template, async_request_outbound_complete,
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TP_PROTO(u64 transaction, unsigned int generation, unsigned int scode, unsigned int status, unsigned int timestamp),
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TP_ARGS(transaction, generation, scode, status, timestamp)
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);
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#undef ASYNC_HEADER_GET_DESTINATION
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#undef ASYNC_HEADER_GET_TLABEL
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#undef ASYNC_HEADER_GET_TCODE
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#undef ASYNC_HEADER_GET_SOURCE
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#undef ASYNC_HEADER_GET_OFFSET
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#undef QUADLET_SIZE
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#endif // _FIREWIRE_TRACE_EVENT_H
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