J721S2 DMA Device Descriptions

Introduction

This chapter provides information on the DMA devices in the J721S2 SoC. Some System Firmware TISCI messages take device specific inputs. This chapter provides information on the valid values for DMA TISCI message parameters.

DMA Device IDs

Some System Firmware TISCI message APIs require the DMA device ID be provided as part of the request. Based on J721S2 Device IDs these are the valid DMA device IDs.

DMA Device Name	DMA Device ID
J721S2_DEV_NAVSS0_BCDMA_0	225
J721S2_DEV_NAVSS0_UDMAP_0	263
J721S2_DEV_MCU_NAVSS0_UDMAP_0	273

DMA Channel and Flow Indices

This section describes valid DMA channel indexes for each DMA channel type. Receive flow index range type information is also described if applicable to the DMA being described.

Warning

Resources marked as reserved for use by TIFS cannot be assigned to a host within the RM Board Configuration resource assignment array. The RM Board Configuration is rejected if an overlap with a reserved resource is detected.

NAVSS0_BCDMA_0

Tx Channel Type	Tx Channel Index Range
SPLIT_TR_TX_CHAN	0 to 15

Rx Channel Type	Rx Channel Index Range
SPLIT_TR_RX_CHAN	0 to 31

Rx Flow Type	Rx Flow Index Range
SPLIT_TR_TX_CHAN	0 to 15
SPLIT_TR_RX_CHAN	16 to 47

NAVSS0_UDMAP_0

Tx Channel Type	Tx Channel Index Range
TX_UHCHAN	0 to 1
TX_HCHAN	2 to 3
TX_CHAN	4 to 84
TX_ECHAN	85 to 340

Rx Channel Type	Rx Channel Index Range
RX_UHCHAN	0 to 1
RX_HCHAN	2 to 3
RX_CHAN	4 to 81

NOTE: The host that owns configurable, also known as common or shared, flows is able to delegate them to another host for configuration in order to aid some use case configurations. The configurable flows can be delegated using TISCI_MSG_RM_UDMAP_FLOW_DELEGATE

Rx Flow Type	Rx Flow Index Range
DEFAULT	0 to 81
CONFIGURABLE	82 to 223

MCU_NAVSS0_UDMAP_0

Tx Channel Type	Tx Channel Index Range
TX_HCHAN	0 to 1
TX_CHAN	2 to 45
TX_CHAN (RESERVED BY SYSTEM FIRMWARE)	46 to 47

Rx Channel Type	Rx Channel Index Range
RX_HCHAN	0 to 1
RX_CHAN	2 to 44
RX_CHAN (RESERVED BY SYSTEM FIRMWARE)	45 to 47

NOTE: The host that owns configurable, also known as common or shared, flows is able to delegate them to another host for configuration in order to aid some use case configurations. The configurable flows can be delegated using TISCI_MSG_RM_UDMAP_FLOW_DELEGATE

Rx Flow Type	Rx Flow Index Range
DEFAULT	0 to 44
DEFAULT (RESERVED BY SYSTEM FIRMWARE)	45 to 47
CONFIGURABLE	48 to 95