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/* SPDX-License-Identifier: GPL-2.0 */
/* Copyright (c) Meta Platforms, Inc. and affiliates. */
#ifndef _FBNIC_MAC_H_
#define _FBNIC_MAC_H_
#include <linux/types.h>
struct fbnic_dev;
#define FBNIC_MAX_JUMBO_FRAME_SIZE 9742
enum {
FBNIC_LINK_EVENT_NONE = 0,
FBNIC_LINK_EVENT_UP = 1,
FBNIC_LINK_EVENT_DOWN = 2,
};
/* Treat the FEC bits as a bitmask laid out as follows:
* Bit 0: RS Enabled
* Bit 1: BASER(Firecode) Enabled
* Bit 2: Retrieve FEC from FW
*/
enum {
FBNIC_FEC_OFF = 0,
FBNIC_FEC_RS = 1,
FBNIC_FEC_BASER = 2,
FBNIC_FEC_AUTO = 4,
};
#define FBNIC_FEC_MODE_MASK (FBNIC_FEC_AUTO - 1)
/* Treat the link modes as a set of modulation/lanes bitmask:
* Bit 0: Lane Count, 0 = R1, 1 = R2
* Bit 1: Modulation, 0 = NRZ, 1 = PAM4
* Bit 2: Retrieve link mode from FW
*/
enum {
FBNIC_LINK_25R1 = 0,
FBNIC_LINK_50R2 = 1,
FBNIC_LINK_50R1 = 2,
FBNIC_LINK_100R2 = 3,
FBNIC_LINK_AUTO = 4,
};
#define FBNIC_LINK_MODE_R2 (FBNIC_LINK_50R2)
#define FBNIC_LINK_MODE_PAM4 (FBNIC_LINK_50R1)
#define FBNIC_LINK_MODE_MASK (FBNIC_LINK_AUTO - 1)
/* This structure defines the interface hooks for the MAC. The MAC hooks
* will be configured as a const struct provided with a set of function
* pointers.
*
* void (*init_regs)(struct fbnic_dev *fbd);
* Initialize MAC registers to enable Tx/Rx paths and FIFOs.
*
* void (*pcs_enable)(struct fbnic_dev *fbd);
* Configure and enable PCS to enable link if not already enabled
* void (*pcs_disable)(struct fbnic_dev *fbd);
* Shutdown the link if we are the only consumer of it.
* bool (*pcs_get_link)(struct fbnic_dev *fbd);
* Check PCS link status
* int (*pcs_get_link_event)(struct fbnic_dev *fbd)
* Get the current link event status, reports true if link has
* changed to either FBNIC_LINK_EVENT_DOWN or FBNIC_LINK_EVENT_UP
*
* void (*link_down)(struct fbnic_dev *fbd);
* Configure MAC for link down event
* void (*link_up)(struct fbnic_dev *fbd, bool tx_pause, bool rx_pause);
* Configure MAC for link up event;
*
*/
struct fbnic_mac {
void (*init_regs)(struct fbnic_dev *fbd);
int (*pcs_enable)(struct fbnic_dev *fbd);
void (*pcs_disable)(struct fbnic_dev *fbd);
bool (*pcs_get_link)(struct fbnic_dev *fbd);
int (*pcs_get_link_event)(struct fbnic_dev *fbd);
void (*link_down)(struct fbnic_dev *fbd);
void (*link_up)(struct fbnic_dev *fbd, bool tx_pause, bool rx_pause);
};
int fbnic_mac_init(struct fbnic_dev *fbd);
#endif /* _FBNIC_MAC_H_ */
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