ipc4_chain_dma Struct Reference

Direct DMA Chaining configuration command (SOF_IPC4_GLB_CHAIN_DMA). More...

#include <src/include/ipc4/pipeline.h>

Data Fields
union {
uint32_t   dat
	Raw 32-bit Primary register value. More...
struct {
uint32_t   host_dma_id: 5
	Host DMA channel identifier. More...
uint32_t   rsvd4: 3
	Reserved bits. More...
uint32_t   link_dma_id: 5
	Link DMA channel identifier. More...
uint32_t   rsvd3: 3
	Reserved bits. More...
uint32_t   allocate: 1
	Allocate FIFO buffer. More...
uint32_t   enable: 1
	Enable DMA chaining. More...
uint32_t   scs: 1
	Select stream context (SCS) bit in gateways. More...
uint32_t   rsvd2: 5
	Reserved bits. More...
uint32_t   type: 5
	Opcode: SOF_IPC4_GLB_CHAIN_DMA (14). More...
uint32_t   rsp: 1
	0 for request. More...
uint32_t   msg_tgt: 1
	0 for global message. More...
uint32_t   _reserved_0: 1
	Reserved bit. More...
}   r
}	primary
union {
uint32_t   dat
	Raw 32-bit Extension register value. More...
struct {
uint32_t   fifo_size: 24
	Size of chaining FIFO buffer in bytes. More...
uint32_t   rsvd1: 6
	Reserved bits. More...
uint32_t   _reserved_2: 2
	Reserved bits. More...
}   r
}	extension

Detailed Description

Direct DMA Chaining configuration command (SOF_IPC4_GLB_CHAIN_DMA).

Field Documentation

_reserved_0

uint32_t ipc4_chain_dma::_reserved_0

Reserved bit.

_reserved_2

uint32_t ipc4_chain_dma::_reserved_2

Reserved bits.

allocate

uint32_t ipc4_chain_dma::allocate

Allocate FIFO buffer.

dat

uint32_t ipc4_chain_dma::dat

Raw 32-bit Primary register value.

Raw 32-bit Extension register value.

enable

uint32_t ipc4_chain_dma::enable

Enable DMA chaining.

[union]

union { ... } ipc4_chain_dma::extension

fifo_size

uint32_t ipc4_chain_dma::fifo_size

Size of chaining FIFO buffer in bytes.

host_dma_id

uint32_t ipc4_chain_dma::host_dma_id

Host DMA channel identifier.

link_dma_id

uint32_t ipc4_chain_dma::link_dma_id

Link DMA channel identifier.

msg_tgt

uint32_t ipc4_chain_dma::msg_tgt

0 for global message.

[union]

union { ... } ipc4_chain_dma::primary

[struct] [1/2]

struct { ... } ipc4_chain_dma::r

[struct] [2/2]

struct { ... } ipc4_chain_dma::r

rsp

uint32_t ipc4_chain_dma::rsp

0 for request.

rsvd1

uint32_t ipc4_chain_dma::rsvd1

Reserved bits.

rsvd2

uint32_t ipc4_chain_dma::rsvd2

Reserved bits.

rsvd3

uint32_t ipc4_chain_dma::rsvd3

Reserved bits.

rsvd4

uint32_t ipc4_chain_dma::rsvd4

Reserved bits.

scs

uint32_t ipc4_chain_dma::scs

Select stream context (SCS) bit in gateways.

type

uint32_t ipc4_chain_dma::type

Opcode: SOF_IPC4_GLB_CHAIN_DMA (14).

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

• src/include/ipc4/pipeline.h