From: Haijun Liu <haijun.liu@xxxxxxxxxxxx> Data Path Modem AP Interface (DPMAIF) HIF layer provides methods for initialization, ISR, control and event handling of TX/RX flows. DPMAIF TX Exposes the `dmpaif_tx_send_skb` function which can be used by the network device to transmit packets. The uplink data management uses a Descriptor Ring Buffer (DRB). First DRB entry is a message type that will be followed by 1 or more normal DRB entries. Message type DRB will hold the skb information and each normal DRB entry holds a pointer to the skb payload. DPMAIF RX The downlink buffer management uses Buffer Address Table (BAT) and Packet Information Table (PIT) rings. The BAT ring holds the address of skb data buffer for the HW to use, while the PIT contains metadata about a whole network packet including a reference to the BAT entry holding the data buffer address. The driver reads the PIT and BAT entries written by the modem, when reaching a threshold, the driver will reload the PIT and BAT rings. Signed-off-by: Haijun Liu <haijun.liu@xxxxxxxxxxxx> Signed-off-by: Chandrashekar Devegowda <chandrashekar.devegowda@xxxxxxxxx> Co-developed-by: Ricardo Martinez <ricardo.martinez@xxxxxxxxxxxxxxx> Signed-off-by: Ricardo Martinez <ricardo.martinez@xxxxxxxxxxxxxxx>
