AM62X DMA Device Descriptions

Introduction

This chapter provides information on the DMA devices in the AM62X 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 AM62X Device IDs these are the valid DMA device IDs.

DMA Device Name	DMA Device ID
AM62X_DEV_DMASS0_BCDMA_0	26
AM62X_DEV_DMASS0_PKTDMA_0	30

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.

DMASS0_BCDMA_0

Tx Channel Type	Tx Channel Index Range
SPLIT_TR_TX_CHAN	0 to 21

Rx Channel Type	Rx Channel Index Range
SPLIT_TR_RX_CHAN	0 to 27

Block Copy Channel Type	Block Copy Channel (Offset) + Index Range
BLOCK_COPY_CHAN	0 to 31

Rx Flow Type	Rx Flow Index Range
BLOCK_COPY_CHAN	0 to 31
SPLIT_TR_TX_CHAN	32 to 53
SPLIT_TR_RX_CHAN	54 to 81

DMASS0_PKTDMA_0

Tx Channel Type	Tx Channel Index Range
UNMAPPED_TX_CHAN	0 to 18
CPSW_TX_CHAN	19 to 26
SAUL_TX_0_CHAN	27 to 27
SAUL_TX_1_CHAN	28 to 28

Rx Channel Type	Rx Channel Index Range
UNMAPPED_RX_CHAN	0 to 18
CPSW_RX_CHAN	19 to 19
SAUL_RX_0_CHAN	20 to 20
SAUL_RX_1_CHAN	21 to 21
SAUL_RX_2_CHAN	22 to 22
SAUL_RX_3_CHAN	23 to 23

Rx Flow Type	Rx Flow Index Range
UNMAPPED_TX_CHAN	0 to 18
CPSW_TX_CHAN	19 to 82
SAUL_TX_0_CHAN	83 to 90
SAUL_TX_1_CHAN	91 to 98
UNMAPPED_RX_CHAN	99 to 117
CPSW_RX_CHAN	118 to 133
SAUL_RX_0_CHAN	134 to 141
SAUL_RX_1_CHAN	134 to 141
SAUL_RX_2_CHAN	142 to 149
SAUL_RX_3_CHAN	142 to 149