J721E DMA Device Descriptions¶
Introduction¶
This chapter provides information on the DMA devices in the J721E 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 J721E Device IDs these are the valid DMA device IDs.
| DMA Device Name | DMA Device ID |
|---|---|
| J721E_DEV_NAVSS0_UDMAP_0 | 212 |
| J721E_DEV_MCU_NAVSS0_UDMAP_0 | 236 |
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 DMSC 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_UDMAP_0
| Tx Channel Type | Tx Channel Index Range |
|---|---|
| TX_UHCHAN | 0 to 3 |
| TX_HCHAN | 4 to 15 |
| TX_CHAN | 16 to 139 |
| TX_ECHAN | 140 to 299 |
| Rx Channel Type | Rx Channel Index Range |
|---|---|
| RX_UHCHAN | 0 to 3 |
| RX_HCHAN | 4 to 15 |
| RX_CHAN | 16 to 139 |
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 139 |
| CONFIGURABLE | 140 to 299 |
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 |