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
15 static u32 stats_base[] = { 0x54c, /* Slice 0 stats start */
16 0xb18, /* Slice 1 stats start */
17 };
18
emac_update_hardware_stats(struct prueth_emac * emac)19 void 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
emac_stats_work_handler(struct work_struct * work)45 void 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
emac_get_stat_by_name(struct prueth_emac * emac,char * stat_name)55 int 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