1// SPDX-License-Identifier: GPL-2.0
2/* Texas Instruments ICSSG Ethernet driver
3 *
4 * Copyright (C) 2018-2021 Texas Instruments Incorporated - https://www.ti.com/
5 *
6 */
7
8#include "icssg_prueth.h"
9#include "icssg_stats.h"
10#include <linux/regmap.h>
11
12#define ICSSG_TX_PACKET_OFFSET	0xA0
13#define ICSSG_TX_BYTE_OFFSET	0xEC
14
15static u32 stats_base[] = {	0x54c,	/* Slice 0 stats start */
16				0xb18,	/* Slice 1 stats start */
17};
18
19void emac_update_hardware_stats(struct prueth_emac *emac)
20{
21	struct prueth *prueth = emac->prueth;
22	int slice = prueth_emac_slice(emac);
23	u32 base = stats_base[slice];
24	u32 tx_pkt_cnt = 0;
25	u32 val;
26	int i;
27
28	for (i = 0; i < ARRAY_SIZE(icssg_all_stats); i++) {
29		regmap_read(prueth->miig_rt,
30			    base + icssg_all_stats[i].offset,
31			    &val);
32		regmap_write(prueth->miig_rt,
33			     base + icssg_all_stats[i].offset,
34			     val);
35
36		if (icssg_all_stats[i].offset == ICSSG_TX_PACKET_OFFSET)
37			tx_pkt_cnt = val;
38
39		emac->stats[i] += val;
40		if (icssg_all_stats[i].offset == ICSSG_TX_BYTE_OFFSET)
41			emac->stats[i] -= tx_pkt_cnt * 8;
42	}
43}
44
45void emac_stats_work_handler(struct work_struct *work)
46{
47	struct prueth_emac *emac = container_of(work, struct prueth_emac,
48						stats_work.work);
49	emac_update_hardware_stats(emac);
50
51	queue_delayed_work(system_long_wq, &emac->stats_work,
52			   msecs_to_jiffies((STATS_TIME_LIMIT_1G_MS * 1000) / emac->speed));
53}
54
55int emac_get_stat_by_name(struct prueth_emac *emac, char *stat_name)
56{
57	int i;
58
59	for (i = 0; i < ARRAY_SIZE(icssg_all_stats); i++) {
60		if (!strcmp(icssg_all_stats[i].name, stat_name))
61			return emac->stats[icssg_all_stats[i].offset / sizeof(u32)];
62	}
63
64	netdev_err(emac->ndev, "Invalid stats %s\n", stat_name);
65	return -EINVAL;
66}
67