dma_trace_data Struct Reference

Main DMA trace context and state machine descriptor. More...

#include <src/include/sof/trace/dma-trace.h>

Collaboration diagram for dma_trace_data:

Data Fields
struct dma_sg_config	config
	Scatter-gather configuration for host DMA.
struct dma_trace_buf	dmatb
	Internal circular buffer tracking read/write pointers.
struct dma_copy	dc
	DMA copy engine instance.
struct sof_ipc_dma_trace_posn	posn
	Position report payload sent to host.
struct ipc_msg *	msg
	IPC message used to report buffer position.
uint32_t	host_size
	Total size of host-allocated trace buffer.
struct task	dmat_work
	Periodic scheduling task driving DMA transfers.
uint32_t	enabled
	1 if DMA trace streaming is active, 0 otherwise
uint32_t	copy_in_progress
	1 if a DMA copy operation is currently underway
uint32_t	stream_tag
	Assigned host DMA stream tag.
uint32_t	active_stream_tag
	Current active stream tag.
uint32_t	dma_copy_align
	Minimal byte alignment required for DMA transfer chunks.
uint32_t	dropped_entries
	Cumulative counter of dropped entries due to buffer overflow.
struct k_spinlock	lock
	Spinlock synchronizing buffer writes and DMA triggers.
uint64_t	time_delta
	Offset between host wallclock and DSP hardware timer.

Detailed Description

Main DMA trace context and state machine descriptor.

Field Documentation

active_stream_tag

uint32_t dma_trace_data::active_stream_tag

Current active stream tag.

config

struct dma_sg_config dma_trace_data::config

Scatter-gather configuration for host DMA.

copy_in_progress

uint32_t dma_trace_data::copy_in_progress

1 if a DMA copy operation is currently underway

dc

struct dma_copy dma_trace_data::dc

DMA copy engine instance.

dma_copy_align

uint32_t dma_trace_data::dma_copy_align

Minimal byte alignment required for DMA transfer chunks.

dmat_work

struct task dma_trace_data::dmat_work

Periodic scheduling task driving DMA transfers.

dmatb

struct dma_trace_buf dma_trace_data::dmatb

Internal circular buffer tracking read/write pointers.

dropped_entries

uint32_t dma_trace_data::dropped_entries

Cumulative counter of dropped entries due to buffer overflow.

enabled

uint32_t dma_trace_data::enabled

1 if DMA trace streaming is active, 0 otherwise

host_size

uint32_t dma_trace_data::host_size

Total size of host-allocated trace buffer.

lock

struct k_spinlock dma_trace_data::lock

Spinlock synchronizing buffer writes and DMA triggers.

msg

struct ipc_msg* dma_trace_data::msg

IPC message used to report buffer position.

posn

struct sof_ipc_dma_trace_posn dma_trace_data::posn

Position report payload sent to host.

stream_tag

uint32_t dma_trace_data::stream_tag

Assigned host DMA stream tag.

time_delta

uint64_t dma_trace_data::time_delta

Offset between host wallclock and DSP hardware timer.

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The documentation for this struct was generated from the following file:

• src/include/sof/trace/dma-trace.h