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Unverified Commit 8d245475 authored by Uwe Kleine-König's avatar Uwe Kleine-König Committed by Mark Brown
Browse files

spi/trace: include buffer contents in traces 



It highly improves usability when the buffer contents are inspecable via
tracing.

Signed-off-by: default avatarUwe Kleine-König <u.kleine-koenig@pengutronix.de>
Signed-off-by: default avatarMark Brown <broonie@kernel.org>
parent 983f6ae9

include/trace/events/spi.h

+26 −2
Original line number Diff line number Diff line
@@ -109,6 +109,16 @@ TRACE_EVENT(spi_message_done, 
                  (unsigned)__entry->actual, (unsigned)__entry->frame)

);



/*

 * consider a buffer valid if non-NULL and if it doesn't match the dummy buffer

 * that only exist to work with controllers that have SPI_CONTROLLER_MUST_TX or

 * SPI_CONTROLLER_MUST_RX.

 */

#define spi_valid_txbuf(msg, xfer) \

	(xfer->tx_buf && xfer->tx_buf != msg->spi->controller->dummy_tx)

#define spi_valid_rxbuf(msg, xfer) \

	(xfer->rx_buf && xfer->rx_buf != msg->spi->controller->dummy_rx)



DECLARE_EVENT_CLASS(spi_transfer,



	TP_PROTO(struct spi_message *msg, struct spi_transfer *xfer),
@@ -120,6 +130,10 @@ DECLARE_EVENT_CLASS(spi_transfer, 
		__field(        int,            chip_select     )

		__field(        struct spi_transfer *,   xfer   )

		__field(        int,            len             )

		__dynamic_array(u8, rx_buf,

				spi_valid_rxbuf(msg, xfer) ? xfer->len : 0)

		__dynamic_array(u8, tx_buf,

				spi_valid_txbuf(msg, xfer) ? xfer->len : 0)

	),



	TP_fast_assign(
@@ -127,11 +141,21 @@ DECLARE_EVENT_CLASS(spi_transfer, 
		__entry->chip_select = msg->spi->chip_select;

		__entry->xfer = xfer;

		__entry->len = xfer->len;



		if (spi_valid_txbuf(msg, xfer))

			memcpy(__get_dynamic_array(tx_buf),

			       xfer->tx_buf, xfer->len);



		if (spi_valid_rxbuf(msg, xfer))

			memcpy(__get_dynamic_array(rx_buf),

			       xfer->rx_buf, xfer->len);

	),



        TP_printk("spi%d.%d %p len=%d",

	TP_printk("spi%d.%d %p len=%d tx=[%*phD] rx=[%*phD]",

		  __entry->bus_num, __entry->chip_select,

		  __entry->xfer, __entry->len)

		  __entry->xfer, __entry->len,

		  __get_dynamic_array_len(tx_buf), __get_dynamic_array(tx_buf),

		  __get_dynamic_array_len(rx_buf), __get_dynamic_array(rx_buf))

);



DEFINE_EVENT(spi_transfer, spi_transfer_start,