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firewire: core: add tracepoints events for asynchronous outbound response

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In a view of core transaction service, the asynchronous outbound response
consists of two stages; initiation and completion.

This commit adds a pair of events for the asynchronous outbound response.
The following example is for asynchronous write quadlet request as IEC
61883-1 FCP response to node 0xffc1.

async_response_outbound_initiate: \
  transaction=0xffff89fa08cf16c0 generation=4 scode=2 dst_id=0xffc1 \
  tlabel=25 tcode=2 src_id=0xffc0 rcode=0 \
  header={0xffc16420,0xffc00000,0x0,0x0} data={}
async_response_outbound_complete: \
  transaction=0xffff89fa08cf16c0 generation=4 scode=2 status=1 \
  timestamp=0x0000

Link: https://lore.kernel.org/r/20240429043218.609398-6-o-takashi@sakamocchi.jp
Signed-off-by: Takashi Sakamoto <o-takashi@sakamocchi.jp>
This commit is contained in:
Takashi Sakamoto
2024-04-29 13:32:18 +09:00
parent 2c945b10d7
commit 624a8535f7
2 changed files with 40 additions and 7 deletions
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23
drivers/firewire/core-transaction.c
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@@ -668,6 +668,9 @@ static void free_response_callback(struct fw_packet *packet,
{
struct fw_request *request = container_of(packet, struct fw_request, response);
trace_async_response_outbound_complete((uintptr_t)request, packet->generation,
packet->speed, status, packet->timestamp);
// Decrease the reference count since not at in-flight.
fw_request_put(request);
@@ -850,6 +853,9 @@ static struct fw_request *allocate_request(struct fw_card *card,
void fw_send_response(struct fw_card *card,
struct fw_request *request, int rcode)
{
u32 *data = NULL;
unsigned int data_length = 0;
/* unified transaction or broadcast transaction: don't respond */
if (request->ack != ACK_PENDING ||
HEADER_DESTINATION_IS_BROADCAST(request->request_header)) {
@@ -857,17 +863,20 @@ void fw_send_response(struct fw_card *card,
return;
}
if (rcode == RCODE_COMPLETE)
fw_fill_response(&request->response, request->request_header,
rcode, request->data,
fw_get_response_length(request));
else
fw_fill_response(&request->response, request->request_header,
rcode, NULL, 0);
if (rcode == RCODE_COMPLETE) {
data = request->data;
data_length = fw_get_response_length(request);
}
fw_fill_response(&request->response, request->request_header, rcode, data, data_length);
// Increase the reference count so that the object is kept during in-flight.
fw_request_get(request);
trace_async_response_outbound_initiate((uintptr_t)request, request->response.generation,
request->response.speed, request->response.header,
data, data ? data_length / 4 : 0);
card->driver->send_response(card, &request->response);
}
EXPORT_SYMBOL(fw_send_response);