1/* SPDX-License-Identifier: GPL-2.0-only */
 2/****************************************************************************
 3 * Driver for Solarflare network controllers and boards
 4 * Copyright 2022 Advanced Micro Devices, Inc.
 5 *
 6 * This program is free software; you can redistribute it and/or modify it
 7 * under the terms of the GNU General Public License version 2 as published
 8 * by the Free Software Foundation, incorporated herein by reference.
 9 */
10
11#ifndef EFX_TC_COUNTERS_H
12#define EFX_TC_COUNTERS_H
13#include <linux/refcount.h>
14#include "net_driver.h"
15
16#include "mcdi_pcol.h" /* for MAE_COUNTER_TYPE_* */
17
18enum efx_tc_counter_type {
19	EFX_TC_COUNTER_TYPE_AR = MAE_COUNTER_TYPE_AR,
20	EFX_TC_COUNTER_TYPE_CT = MAE_COUNTER_TYPE_CT,
21	EFX_TC_COUNTER_TYPE_OR = MAE_COUNTER_TYPE_OR,
22	EFX_TC_COUNTER_TYPE_MAX
23};
24
25struct efx_tc_counter {
26	u32 fw_id; /* index in firmware counter table */
27	enum efx_tc_counter_type type;
28	struct rhash_head linkage; /* efx->tc->counter_ht */
29	spinlock_t lock; /* Serialises updates to counter values */
30	u32 gen; /* Generation count at which this counter is current */
31	u64 packets, bytes;
32	u64 old_packets, old_bytes; /* Values last time passed to userspace */
33	/* jiffies of the last time we saw packets increase */
34	unsigned long touched;
35};
36
37struct efx_tc_counter_index {
38	unsigned long cookie;
39	struct rhash_head linkage; /* efx->tc->counter_id_ht */
40	refcount_t ref;
41	struct efx_tc_counter *cnt;
42};
43
44/* create/uncreate/teardown hashtables */
45int efx_tc_init_counters(struct efx_nic *efx);
46void efx_tc_destroy_counters(struct efx_nic *efx);
47void efx_tc_fini_counters(struct efx_nic *efx);
48
49struct efx_tc_counter_index *efx_tc_flower_get_counter_index(
50				struct efx_nic *efx, unsigned long cookie,
51				enum efx_tc_counter_type type);
52void efx_tc_flower_put_counter_index(struct efx_nic *efx,
53				     struct efx_tc_counter_index *ctr);
54struct efx_tc_counter_index *efx_tc_flower_find_counter_index(
55				struct efx_nic *efx, unsigned long cookie);
56
57extern const struct efx_channel_type efx_tc_channel_type;
58
59#endif /* EFX_TC_COUNTERS_H */