| Bit | Bit Width | Field Name | Description |
|---|---|---|---|
| [127:96] | 32 | addr_h | Address High. Higher 32 bits of the source address in Host |
| [95:64] | 32 | addr_l | Address Low. Lower 32 bits of the source address in Host |
| [63:48] | 16 | reserved | Reserved |
| [47:32] | 16 | len |
Packet Length. Length of the data to be fetched for this descriptor. This is also the packet length since in internal mode, a packet cannot span multiple descriptors. The maximum length of the packet can be 64K-1 bytes. |
| [31:0] | 32 | metadata |
Metadata. QDMA passes this field on the H2C-ST TUSER along with the data on every beat. For a queue in internal mode, it can be used to pass messages from SW to user logic along with the data. |
This H2C descriptor format is only applicable for internal mode. For bypass mode, the user logic can define its own format as needed by the user application.