/* SPDX-License-Identifier: GPL-2.0 */ /* Marvell Octeon EP (EndPoint) Ethernet Driver * * Copyright (C) 2020 Marvell. * */ #ifndef _OCTEP_RX_H_ #define _OCTEP_RX_H_ /* struct octep_oq_desc_hw - Octeon Hardware OQ descriptor format. * * The descriptor ring is made of descriptors which have 2 64-bit values: * * @buffer_ptr: DMA address of the skb->data * @info_ptr: DMA address of host memory, used to update pkt count by hw. * This is currently unused to save pci writes. */ struct octep_oq_desc_hw { … }; static_assert(…); #define OCTEP_OQ_DESC_SIZE … /* Rx offload flags */ #define OCTEP_RX_OFFLOAD_VLAN_STRIP … #define OCTEP_RX_OFFLOAD_IPV4_CKSUM … #define OCTEP_RX_OFFLOAD_UDP_CKSUM … #define OCTEP_RX_OFFLOAD_TCP_CKSUM … #define OCTEP_RX_OFFLOAD_CKSUM … #define OCTEP_RX_IP_CSUM(flags) … /* bit 0 is vlan strip */ #define OCTEP_RX_CSUM_IP_VERIFIED … #define OCTEP_RX_CSUM_L4_VERIFIED … #define OCTEP_RX_CSUM_VERIFIED(flags) … /* Extended Response Header in packet data received from Hardware. * Includes metadata like checksum status. * this is valid only if hardware/firmware published support for this. * This is at offset 0 of packet data (skb->data). */ struct octep_oq_resp_hw_ext { … }; static_assert(…); #define OCTEP_OQ_RESP_HW_EXT_SIZE … /* Length of Rx packet DMA'ed by Octeon to Host. * this is in bigendian; so need to be converted to cpu endian. * Octeon writes this at the beginning of Rx buffer (skb->data). */ struct octep_oq_resp_hw { … }; static_assert(…); #define OCTEP_OQ_RESP_HW_SIZE … /* Pointer to data buffer. * Driver keeps a pointer to the data buffer that it made available to * the Octeon device. Since the descriptor ring keeps physical (bus) * addresses, this field is required for the driver to keep track of * the virtual address pointers. The fields are operated by * OS-dependent routines. */ struct octep_rx_buffer { … }; #define OCTEP_OQ_RECVBUF_SIZE … /* Output Queue statistics. Each output queue has four stats fields. */ struct octep_oq_stats { … }; #define OCTEP_OQ_STATS_SIZE … /* Hardware interface Rx statistics */ struct octep_iface_rx_stats { … }; /* The Descriptor Ring Output Queue structure. * This structure has all the information required to implement a * Octeon OQ. */ struct octep_oq { … }; #define OCTEP_OQ_SIZE … #endif /* _OCTEP_RX_H_ */
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