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 #define ICSSG_FW_STATS_BASE 0x0248
15
16 static u32 stats_base[] = { 0x54c, /* Slice 0 stats start */
17 0xb18, /* Slice 1 stats start */
18 };
19
emac_update_hardware_stats(struct prueth_emac * emac)20 void emac_update_hardware_stats(struct prueth_emac *emac)
21 {
22 struct prueth *prueth = emac->prueth;
23 int slice = prueth_emac_slice(emac);
24 u32 base = stats_base[slice];
25 u32 tx_pkt_cnt = 0;
26 u32 val, reg;
27 int i;
28
29 for (i = 0; i < ARRAY_SIZE(icssg_all_miig_stats); i++) {
30 regmap_read(prueth->miig_rt,
31 base + icssg_all_miig_stats[i].offset,
32 &val);
33 regmap_write(prueth->miig_rt,
34 base + icssg_all_miig_stats[i].offset,
35 val);
36
37 if (icssg_all_miig_stats[i].offset == ICSSG_TX_PACKET_OFFSET)
38 tx_pkt_cnt = val;
39
40 emac->stats[i] += val;
41 if (icssg_all_miig_stats[i].offset == ICSSG_TX_BYTE_OFFSET)
42 emac->stats[i] -= tx_pkt_cnt * 8;
43 }
44
45 if (prueth->pa_stats) {
46 for (i = 0; i < ARRAY_SIZE(icssg_all_pa_stats); i++) {
47 reg = ICSSG_FW_STATS_BASE +
48 icssg_all_pa_stats[i].offset *
49 PRUETH_NUM_MACS + slice * sizeof(u32);
50 regmap_read(prueth->pa_stats, reg, &val);
51 emac->pa_stats[i] += val;
52 }
53 }
54 }
55
icssg_stats_work_handler(struct work_struct * work)56 void icssg_stats_work_handler(struct work_struct *work)
57 {
58 struct prueth_emac *emac = container_of(work, struct prueth_emac,
59 stats_work.work);
60 emac_update_hardware_stats(emac);
61
62 queue_delayed_work(system_long_wq, &emac->stats_work,
63 msecs_to_jiffies((STATS_TIME_LIMIT_1G_MS * 1000) / emac->speed));
64 }
65 EXPORT_SYMBOL_GPL(icssg_stats_work_handler);
66
emac_get_stat_by_name(struct prueth_emac * emac,char * stat_name)67 int emac_get_stat_by_name(struct prueth_emac *emac, char *stat_name)
68 {
69 int i;
70
71 for (i = 0; i < ARRAY_SIZE(icssg_all_miig_stats); i++) {
72 if (!strcmp(icssg_all_miig_stats[i].name, stat_name))
73 return emac->stats[icssg_all_miig_stats[i].offset / sizeof(u32)];
74 }
75
76 if (emac->prueth->pa_stats) {
77 for (i = 0; i < ARRAY_SIZE(icssg_all_pa_stats); i++) {
78 if (!strcmp(icssg_all_pa_stats[i].name, stat_name))
79 return emac->pa_stats[icssg_all_pa_stats[i].offset / sizeof(u32)];
80 }
81 }
82
83 netdev_err(emac->ndev, "Invalid stats %s\n", stat_name);
84 return -EINVAL;
85 }
86