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1/* SPDX-License-Identifier: GPL-2.0 */2/* Copyright (c) Meta Platforms, Inc. and affiliates. */3 4#ifndef _FBNIC_MAC_H_5#define _FBNIC_MAC_H_6 7#include <linux/types.h>8 9struct fbnic_dev;10 11#define FBNIC_MAX_JUMBO_FRAME_SIZE 974212 13enum {14 FBNIC_LINK_EVENT_NONE = 0,15 FBNIC_LINK_EVENT_UP = 1,16 FBNIC_LINK_EVENT_DOWN = 2,17};18 19/* Treat the FEC bits as a bitmask laid out as follows:20 * Bit 0: RS Enabled21 * Bit 1: BASER(Firecode) Enabled22 * Bit 2: Retrieve FEC from FW23 */24enum {25 FBNIC_FEC_OFF = 0,26 FBNIC_FEC_RS = 1,27 FBNIC_FEC_BASER = 2,28 FBNIC_FEC_AUTO = 4,29};30 31#define FBNIC_FEC_MODE_MASK (FBNIC_FEC_AUTO - 1)32 33/* Treat the link modes as a set of modulation/lanes bitmask:34 * Bit 0: Lane Count, 0 = R1, 1 = R235 * Bit 1: Modulation, 0 = NRZ, 1 = PAM436 * Bit 2: Retrieve link mode from FW37 */38enum {39 FBNIC_LINK_25R1 = 0,40 FBNIC_LINK_50R2 = 1,41 FBNIC_LINK_50R1 = 2,42 FBNIC_LINK_100R2 = 3,43 FBNIC_LINK_AUTO = 4,44};45 46#define FBNIC_LINK_MODE_R2 (FBNIC_LINK_50R2)47#define FBNIC_LINK_MODE_PAM4 (FBNIC_LINK_50R1)48#define FBNIC_LINK_MODE_MASK (FBNIC_LINK_AUTO - 1)49 50/* This structure defines the interface hooks for the MAC. The MAC hooks51 * will be configured as a const struct provided with a set of function52 * pointers.53 *54 * void (*init_regs)(struct fbnic_dev *fbd);55 * Initialize MAC registers to enable Tx/Rx paths and FIFOs.56 *57 * void (*pcs_enable)(struct fbnic_dev *fbd);58 * Configure and enable PCS to enable link if not already enabled59 * void (*pcs_disable)(struct fbnic_dev *fbd);60 * Shutdown the link if we are the only consumer of it.61 * bool (*pcs_get_link)(struct fbnic_dev *fbd);62 * Check PCS link status63 * int (*pcs_get_link_event)(struct fbnic_dev *fbd)64 * Get the current link event status, reports true if link has65 * changed to either FBNIC_LINK_EVENT_DOWN or FBNIC_LINK_EVENT_UP66 *67 * void (*link_down)(struct fbnic_dev *fbd);68 * Configure MAC for link down event69 * void (*link_up)(struct fbnic_dev *fbd, bool tx_pause, bool rx_pause);70 * Configure MAC for link up event;71 *72 */73struct fbnic_mac {74 void (*init_regs)(struct fbnic_dev *fbd);75 76 int (*pcs_enable)(struct fbnic_dev *fbd);77 void (*pcs_disable)(struct fbnic_dev *fbd);78 bool (*pcs_get_link)(struct fbnic_dev *fbd);79 int (*pcs_get_link_event)(struct fbnic_dev *fbd);80 81 void (*get_eth_mac_stats)(struct fbnic_dev *fbd, bool reset,82 struct fbnic_eth_mac_stats *mac_stats);83 84 void (*link_down)(struct fbnic_dev *fbd);85 void (*link_up)(struct fbnic_dev *fbd, bool tx_pause, bool rx_pause);86};87 88int fbnic_mac_init(struct fbnic_dev *fbd);89#endif /* _FBNIC_MAC_H_ */90