diff options
| author | Mark Brown <broonie@linaro.org> | 2013-10-07 18:33:53 (GMT) |
|---|---|---|
| committer | Mark Brown <broonie@linaro.org> | 2013-10-07 19:02:01 (GMT) |
| commit | 56ec1978ff07380bbdc0a942c8779ec9fd9e02ee (patch) | |
| tree | 4f9dc2dfc2e4aab1aec8872cea58c56369afaef8 /drivers/spi | |
| parent | d0e639c9e06d44e713170031fe05fb60ebe680af (diff) | |
| download | linux-fsl-qoriq-56ec1978ff07380bbdc0a942c8779ec9fd9e02ee.tar.xz | |
spi: Provide trace points for message processing
Provide tracepoints for the lifecycle of a message from submission to
completion and for the active time for masters to help with performance
analysis of SPI I/O.
Signed-off-by: Mark Brown <broonie@linaro.org>
Diffstat (limited to 'drivers/spi')
| -rw-r--r-- | drivers/spi/spi.c | 16 |
1 files changed, 15 insertions, 1 deletions
diff --git a/drivers/spi/spi.c b/drivers/spi/spi.c index 9e039c6..8bef0c9 100644 --- a/drivers/spi/spi.c +++ b/drivers/spi/spi.c @@ -39,6 +39,9 @@ #include <linux/ioport.h> #include <linux/acpi.h> +#define CREATE_TRACE_POINTS +#include <trace/events/spi.h> + static void spidev_release(struct device *dev) { struct spi_device *spi = to_spi_device(dev); @@ -557,6 +560,7 @@ static void spi_pump_messages(struct kthread_work *work) pm_runtime_mark_last_busy(master->dev.parent); pm_runtime_put_autosuspend(master->dev.parent); } + trace_spi_master_idle(master); return; } @@ -585,6 +589,9 @@ static void spi_pump_messages(struct kthread_work *work) } } + if (!was_busy) + trace_spi_master_busy(master); + if (!was_busy && master->prepare_transfer_hardware) { ret = master->prepare_transfer_hardware(master); if (ret) { @@ -597,6 +604,8 @@ static void spi_pump_messages(struct kthread_work *work) } } + trace_spi_message_start(master->cur_msg); + ret = master->transfer_one_message(master, master->cur_msg); if (ret) { dev_err(&master->dev, @@ -689,6 +698,8 @@ void spi_finalize_current_message(struct spi_master *master) mesg->state = NULL; if (mesg->complete) mesg->complete(mesg->context); + + trace_spi_message_done(mesg); } EXPORT_SYMBOL_GPL(spi_finalize_current_message); @@ -1421,6 +1432,10 @@ static int __spi_async(struct spi_device *spi, struct spi_message *message) struct spi_master *master = spi->master; struct spi_transfer *xfer; + message->spi = spi; + + trace_spi_message_submit(message); + if (list_empty(&message->transfers)) return -EINVAL; if (!message->complete) @@ -1520,7 +1535,6 @@ static int __spi_async(struct spi_device *spi, struct spi_message *message) } } - message->spi = spi; message->status = -EINPROGRESS; return master->transfer(spi, message); } |