linux/drivers/net/ethernet/mellanox/mlxbf_gige/mlxbf_gige_rx.c

// SPDX-License-Identifier: GPL-2.0-only OR BSD-3-Clause

/* Packet receive logic for Mellanox Gigabit Ethernet driver
 *
 * Copyright (C) 2020-2021 NVIDIA CORPORATION & AFFILIATES
 */

#include <linux/etherdevice.h>
#include <linux/skbuff.h>

#include "mlxbf_gige.h"
#include "mlxbf_gige_regs.h"

void mlxbf_gige_enable_multicast_rx(struct mlxbf_gige *priv)
{ … }

void mlxbf_gige_disable_multicast_rx(struct mlxbf_gige *priv)
{ … }

void mlxbf_gige_enable_mac_rx_filter(struct mlxbf_gige *priv,
				     unsigned int index)
{ … }

void mlxbf_gige_disable_mac_rx_filter(struct mlxbf_gige *priv,
				      unsigned int index)
{ … }

void mlxbf_gige_set_mac_rx_filter(struct mlxbf_gige *priv,
				  unsigned int index, u64 dmac)
{ … }

void mlxbf_gige_get_mac_rx_filter(struct mlxbf_gige *priv,
				  unsigned int index, u64 *dmac)
{ … }

void mlxbf_gige_enable_promisc(struct mlxbf_gige *priv)
{ … }

void mlxbf_gige_disable_promisc(struct mlxbf_gige *priv)
{ … }

/* Receive Initialization
 * 1) Configures RX MAC filters via MMIO registers
 * 2) Allocates RX WQE array using coherent DMA mapping
 * 3) Initializes each element of RX WQE array with a receive
 *    buffer pointer (also using coherent DMA mapping)
 * 4) Allocates RX CQE array using coherent DMA mapping
 * 5) Completes other misc receive initialization
 */
int mlxbf_gige_rx_init(struct mlxbf_gige *priv)
{ … }

/* Receive Deinitialization
 * This routine will free allocations done by mlxbf_gige_rx_init(),
 * namely the RX WQE and RX CQE arrays, as well as all RX buffers
 */
void mlxbf_gige_rx_deinit(struct mlxbf_gige *priv)
{ … }

static bool mlxbf_gige_rx_packet(struct mlxbf_gige *priv, int *rx_pkts)
{ … }

/* Driver poll() function called by NAPI infrastructure */
int mlxbf_gige_poll(struct napi_struct *napi, int budget)
{ … }