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	struct work_struct work; /* For notifying encap actions */
36	/* owners of corresponding count actions */
37	struct list_head users;
38};
39
40struct efx_tc_counter_index {
41	unsigned long cookie;
42	struct rhash_head linkage; /* efx->tc->counter_id_ht */
43	refcount_t ref;
44	struct efx_tc_counter *cnt;
45};
46
47/* create/uncreate/teardown hashtables */
48int efx_tc_init_counters(struct efx_nic *efx);
49void efx_tc_destroy_counters(struct efx_nic *efx);
50void efx_tc_fini_counters(struct efx_nic *efx);
51
52struct efx_tc_counter *efx_tc_flower_allocate_counter(struct efx_nic *efx,
53						      int type);
54void efx_tc_flower_release_counter(struct efx_nic *efx,
55				   struct efx_tc_counter *cnt);
56struct efx_tc_counter_index *efx_tc_flower_get_counter_index(
57				struct efx_nic *efx, unsigned long cookie,
58				enum efx_tc_counter_type type);
59void efx_tc_flower_put_counter_index(struct efx_nic *efx,
60				     struct efx_tc_counter_index *ctr);
61struct efx_tc_counter_index *efx_tc_flower_find_counter_index(
62				struct efx_nic *efx, unsigned long cookie);
63
64extern const struct efx_channel_type efx_tc_channel_type;
65
66#endif /* EFX_TC_COUNTERS_H */
67