dma-trace.h File Reference

Direct Memory Access (DMA) trace buffer management and host streaming. More...

Include dependency graph for dma-trace.h:

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Data Structures
struct	dma_trace_buf
	Internal ring buffer descriptor for DSP trace packets. More...
struct	dma_trace_data
	Main DMA trace context and state machine descriptor. More...

Functions
int	dma_trace_init_early (struct sof *sof)
	Early initialization of the DMA trace subsystem during bootstrap.
int	dma_trace_init_complete (struct dma_trace_data *d)
	Complete initialization of DMA trace once host channel is negotiated.
int	dma_trace_host_buffer (struct dma_trace_data *d, struct dma_sg_elem_array *elem_array, uint32_t host_size)
	Configure the host-side destination scatter-gather buffer for DMA trace.
int	dma_trace_enable (struct dma_trace_data *d)
	Enable DMA trace streaming to the host.
void	dma_trace_disable (struct dma_trace_data *d)
	Disable DMA trace streaming and cancel pending periodic tasks.
void	dma_trace_flush (void *destination)
	Flush residual trace data from local DSP buffer to destination memory or mailbox.
void	dma_trace_on (void)
	Globally unpause and resume trace event logging.
void	dma_trace_off (void)
	Globally pause trace event logging.
void	dtrace_event (const char *e, uint32_t size)
	Append a binary trace event to the circular buffer.
void	dtrace_event_atomic (const char *e, uint32_t length)
	Append a binary trace event to the buffer from atomic or interrupt context.
static bool	dma_trace_initialized (const struct dma_trace_data *d)
	Check whether DMA trace subsystem has been initialized.
static struct dma_trace_data *	dma_trace_data_get (void)
	Retrieve global DMA trace data context from system runtime.
static uint32_t	dtrace_calc_buf_margin (struct dma_trace_buf *buffer)
	Calculate contiguous bytes remaining until the end of the circular buffer.

Detailed Description

Direct Memory Access (DMA) trace buffer management and host streaming.