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firewire: core: add tracepoints events for setting channels of multichannel context

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It is helpful to trace the channel setting for the multichannel isochronous
context when the core function is requested it by both in-kernel unit
drivers and userspace applications.

This commit adds some tracepoints events for the aim.

Link: https://lore.kernel.org/r/20240623220859.851685-3-o-takashi@sakamocchi.jp
Signed-off-by: Takashi Sakamoto <o-takashi@sakamocchi.jp>
This commit is contained in:
Takashi Sakamoto 2024-06-24 07:08:53 +09:00
parent 25e6e00d3f
commit 9f16ac725b
2 changed files with 23 additions and 0 deletions
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2
drivers/firewire/core-iso.c
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@ -177,6 +177,8 @@ EXPORT_SYMBOL(fw_iso_context_start);
int fw_iso_context_set_channels(struct fw_iso_context *ctx, u64 *channels)
{
trace_isoc_inbound_multiple_channels(ctx, *channels);
return ctx->card->driver->set_iso_channels(ctx, channels);
}

21
include/trace/events/firewire.h
View File

@ -541,6 +541,27 @@ DEFINE_EVENT_CONDITION(isoc_destroy_template, isoc_inbound_multiple_destroy,
TP_CONDITION(ctx->type == FW_ISO_CONTEXT_RECEIVE_MULTICHANNEL)
);
TRACE_EVENT(isoc_inbound_multiple_channels,
TP_PROTO(const struct fw_iso_context *ctx, u64 channels),
TP_ARGS(ctx, channels),
TP_STRUCT__entry(
__field(u64, context)
__field(u8, card_index)
__field(u64, channels)
),
TP_fast_assign(
__entry->context = (uintptr_t)ctx;
__entry->card_index = ctx->card->index;
__entry->channels = channels;
),
TP_printk(
"context=0x%llx card_index=%u channels=0x%016llx",
__entry->context,
__entry->card_index,
__entry->channels
)
);
#undef QUADLET_SIZE
#endif // _FIREWIRE_TRACE_EVENT_H