Donate to e Foundation | Murena handsets with /e/OS | Own a part of Murena! Learn more

Commit 95f295f9 authored by Ben Dooks's avatar Ben Dooks Committed by Vinod Koul
Browse files

dmaengine: tegra: add tracepoints to driver 



Add some trace-points to the driver to allow for debuging via the
trace pipe.

Signed-off-by: default avatarBen Dooks <ben.dooks@codethink.co.uk>
Reviewed-by: default avatarSteven Rostedt (VMware) <rostedt@goodmis.org>
Signed-off-by: default avatarVinod Koul <vkoul@kernel.org>
parent 65c383c7

drivers/dma/tegra20-apb-dma.c

+7 −0
Original line number Diff line number Diff line
@@ -38,6 +38,9 @@ 


#include "dmaengine.h"



#define CREATE_TRACE_POINTS

#include <trace/events/tegra_apb_dma.h>



#define TEGRA_APBDMA_GENERAL			0x0

#define TEGRA_APBDMA_GENERAL_ENABLE		BIT(31)
@@ -672,6 +675,8 @@ static void tegra_dma_tasklet(unsigned long data) 
		dmaengine_desc_get_callback(&dma_desc->txd, &cb);

		cb_count = dma_desc->cb_count;

		dma_desc->cb_count = 0;

		trace_tegra_dma_complete_cb(&tdc->dma_chan, cb_count,

					    cb.callback);

		spin_unlock_irqrestore(&tdc->lock, flags);

		while (cb_count--)

			dmaengine_desc_callback_invoke(&cb, NULL);
@@ -688,6 +693,7 @@ static irqreturn_t tegra_dma_isr(int irq, void *dev_id) 


	spin_lock_irqsave(&tdc->lock, flags);



	trace_tegra_dma_isr(&tdc->dma_chan, irq);

	status = tdc_read(tdc, TEGRA_APBDMA_CHAN_STATUS);

	if (status & TEGRA_APBDMA_STATUS_ISE_EOC) {

		tdc_write(tdc, TEGRA_APBDMA_CHAN_STATUS, status);
@@ -846,6 +852,7 @@ static enum dma_status tegra_dma_tx_status(struct dma_chan *dc, 
		dma_set_residue(txstate, residual);

	}



	trace_tegra_dma_tx_status(&tdc->dma_chan, cookie, txstate);

	spin_unlock_irqrestore(&tdc->lock, flags);

	return ret;

}

include/trace/events/tegra_apb_dma.h

0 → 100644
+61 −0
Original line number Diff line number Diff line 
#if !defined(_TRACE_TEGRA_APB_DMA_H) || defined(TRACE_HEADER_MULTI_READ)

#define _TRACE_TEGRA_APM_DMA_H



#include <linux/tracepoint.h>

#include <linux/dmaengine.h>



#undef TRACE_SYSTEM

#define TRACE_SYSTEM tegra_apb_dma



TRACE_EVENT(tegra_dma_tx_status,

	TP_PROTO(struct dma_chan *dc, dma_cookie_t cookie, struct dma_tx_state *state),

	TP_ARGS(dc, cookie, state),

	TP_STRUCT__entry(

		__string(chan,	dev_name(&dc->dev->device))

		__field(dma_cookie_t, cookie)

		__field(__u32,	residue)

	),

	TP_fast_assign(

		__assign_str(chan, dev_name(&dc->dev->device));

		__entry->cookie = cookie;

		__entry->residue = state ? state->residue : (u32)-1;

	),

	TP_printk("channel %s: dma cookie %d, residue %u",

		  __get_str(chan), __entry->cookie, __entry->residue)

);



TRACE_EVENT(tegra_dma_complete_cb,

	TP_PROTO(struct dma_chan *dc, int count, void *ptr),

	TP_ARGS(dc, count, ptr),

	TP_STRUCT__entry(

		__string(chan,	dev_name(&dc->dev->device))

		__field(int,	count)

		__field(void *,	ptr)

		),

	TP_fast_assign(

		__assign_str(chan, dev_name(&dc->dev->device));

		__entry->count = count;

		__entry->ptr = ptr;

		),

	TP_printk("channel %s: done %d, ptr %p",

		  __get_str(chan), __entry->count, __entry->ptr)

);



TRACE_EVENT(tegra_dma_isr,

	TP_PROTO(struct dma_chan *dc, int irq),

	TP_ARGS(dc, irq),

	TP_STRUCT__entry(

		__string(chan,	dev_name(&dc->dev->device))

		__field(int,	irq)

	),

	TP_fast_assign(

		__assign_str(chan, dev_name(&dc->dev->device));

		__entry->irq = irq;

	),

	TP_printk("%s: irq %d\n",  __get_str(chan), __entry->irq)

);



#endif /*  _TRACE_TEGRADMA_H */



/* This part must be outside protection */

#include <trace/define_trace.h>