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firewire: core: add tracepoints events for completions of packets in isochronous context

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It is helpful to trace completion of packets in isochronous context when
the core function is requested them by both in-kernel units driver and
userspace applications.

This commit adds some tracepoints events for the aim.

Link: https://lore.kernel.org/r/20240623220859.851685-8-o-takashi@sakamocchi.jp
Signed-off-by: Takashi Sakamoto <o-takashi@sakamocchi.jp>
This commit is contained in:
Takashi Sakamoto
2024-06-24 07:08:58 +09:00
parent 1f3c0d794d
commit daf763c2d6
3 changed files with 99 additions and 6 deletions
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drivers/firewire/ohci.c
+17 -6
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@@ -2833,8 +2833,13 @@ static void ohci_write_csr(struct fw_card *card, int csr_offset, u32 value)
}
}
static void flush_iso_completions(struct iso_context *ctx)
static void flush_iso_completions(struct iso_context *ctx, enum fw_iso_context_completions_cause cause)
{
trace_isoc_inbound_single_completions(&ctx->base, ctx->last_timestamp, cause, ctx->header,
ctx->header_length);
trace_isoc_outbound_completions(&ctx->base, ctx->last_timestamp, cause, ctx->header,
ctx->header_length);
ctx->base.callback.sc(&ctx->base, ctx->last_timestamp,
ctx->header_length, ctx->header,
ctx->base.callback_data);
@@ -2848,7 +2853,7 @@ static void copy_iso_headers(struct iso_context *ctx, const u32 *dma_hdr)
if (ctx->header_length + ctx->base.header_size > PAGE_SIZE) {
if (ctx->base.drop_overflow_headers)
return;
flush_iso_completions(ctx);
flush_iso_completions(ctx, FW_ISO_CONTEXT_COMPLETIONS_CAUSE_HEADER_OVERFLOW);
}
ctx_hdr = ctx->header + ctx->header_length;
@@ -2897,7 +2902,7 @@ static int handle_ir_packet_per_buffer(struct context *context,
copy_iso_headers(ctx, (u32 *) (last + 1));
if (last->control & cpu_to_le16(DESCRIPTOR_IRQ_ALWAYS))
flush_iso_completions(ctx);
flush_iso_completions(ctx, FW_ISO_CONTEXT_COMPLETIONS_CAUSE_IRQ);
return 1;
}
@@ -2932,6 +2937,9 @@ static int handle_ir_buffer_fill(struct context *context,
completed, DMA_FROM_DEVICE);
if (last->control & cpu_to_le16(DESCRIPTOR_IRQ_ALWAYS)) {
trace_isoc_inbound_multiple_completions(&ctx->base, completed,
FW_ISO_CONTEXT_COMPLETIONS_CAUSE_IRQ);
ctx->base.callback.mc(&ctx->base,
buffer_dma + completed,
ctx->base.callback_data);
@@ -2948,6 +2956,9 @@ static void flush_ir_buffer_fill(struct iso_context *ctx)
ctx->mc_buffer_bus & ~PAGE_MASK,
ctx->mc_completed, DMA_FROM_DEVICE);
trace_isoc_inbound_multiple_completions(&ctx->base, ctx->mc_completed,
FW_ISO_CONTEXT_COMPLETIONS_CAUSE_FLUSH);
ctx->base.callback.mc(&ctx->base,
ctx->mc_buffer_bus + ctx->mc_completed,
ctx->base.callback_data);
@@ -3012,7 +3023,7 @@ static int handle_it_packet(struct context *context,
if (ctx->header_length + 4 > PAGE_SIZE) {
if (ctx->base.drop_overflow_headers)
return 1;
flush_iso_completions(ctx);
flush_iso_completions(ctx, FW_ISO_CONTEXT_COMPLETIONS_CAUSE_HEADER_OVERFLOW);
}
ctx_hdr = ctx->header + ctx->header_length;
@@ -3023,7 +3034,7 @@ static int handle_it_packet(struct context *context,
ctx->header_length += 4;
if (last->control & cpu_to_le16(DESCRIPTOR_IRQ_ALWAYS))
flush_iso_completions(ctx);
flush_iso_completions(ctx, FW_ISO_CONTEXT_COMPLETIONS_CAUSE_IRQ);
return 1;
}
@@ -3588,7 +3599,7 @@ static int ohci_flush_iso_completions(struct fw_iso_context *base)
case FW_ISO_CONTEXT_TRANSMIT:
case FW_ISO_CONTEXT_RECEIVE:
if (ctx->header_length != 0)
flush_iso_completions(ctx);
flush_iso_completions(ctx, FW_ISO_CONTEXT_COMPLETIONS_CAUSE_FLUSH);
break;
case FW_ISO_CONTEXT_RECEIVE_MULTICHANNEL:
if (ctx->mc_completed != 0)