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 spin_lock(&prueth->stats_lock);
30
31 for (i = 0; i < ARRAY_SIZE(icssg_all_miig_stats); i++) {
32 /* In MII mode TX lines are swapped inside ICSSG, so read Tx stats
33 * from slice1 for port0 and slice0 for port1 to get accurate Tx
34 * stats for a given port
35 */
36 if (emac->phy_if == PHY_INTERFACE_MODE_MII &&
37 icssg_all_miig_stats[i].offset >= ICSSG_TX_PACKET_OFFSET &&
38 icssg_all_miig_stats[i].offset <= ICSSG_TX_BYTE_OFFSET)
39 base = stats_base[slice ^ 1];
40 regmap_read(prueth->miig_rt,
41 base + icssg_all_miig_stats[i].offset,
42 &val);
43 regmap_write(prueth->miig_rt,
44 base + icssg_all_miig_stats[i].offset,
45 val);
46
47 if (icssg_all_miig_stats[i].offset == ICSSG_TX_PACKET_OFFSET)
48 tx_pkt_cnt = val;
49
50 emac->stats[i] += val;
51 if (icssg_all_miig_stats[i].offset == ICSSG_TX_BYTE_OFFSET)
52 emac->stats[i] -= tx_pkt_cnt * 8;
53 }
54
55 if (prueth->pa_stats) {
56 for (i = 0; i < ARRAY_SIZE(icssg_all_pa_stats); i++) {
57 reg = ICSSG_FW_STATS_BASE +
58 icssg_all_pa_stats[i].offset *
59 PRUETH_NUM_MACS + slice * sizeof(u32);
60 regmap_read(prueth->pa_stats, reg, &val);
61 emac->pa_stats[i] += val;
62 }
63 }
64
65 spin_unlock(&prueth->stats_lock);
66 }
67
icssg_stats_work_handler(struct work_struct * work)68 void icssg_stats_work_handler(struct work_struct *work)
69 {
70 struct prueth_emac *emac = container_of(work, struct prueth_emac,
71 stats_work.work);
72 emac_update_hardware_stats(emac);
73
74 queue_delayed_work(system_long_wq, &emac->stats_work,
75 msecs_to_jiffies((STATS_TIME_LIMIT_1G_MS * 1000) / emac->speed));
76 }
77 EXPORT_SYMBOL_GPL(icssg_stats_work_handler);
78
emac_get_stat_by_name(struct prueth_emac * emac,char * stat_name)79 int emac_get_stat_by_name(struct prueth_emac *emac, char *stat_name)
80 {
81 int i;
82
83 for (i = 0; i < ARRAY_SIZE(icssg_all_miig_stats); i++) {
84 if (!strcmp(icssg_all_miig_stats[i].name, stat_name))
85 return emac->stats[icssg_all_miig_stats[i].offset / sizeof(u32)];
86 }
87
88 if (emac->prueth->pa_stats) {
89 for (i = 0; i < ARRAY_SIZE(icssg_all_pa_stats); i++) {
90 if (!strcmp(icssg_all_pa_stats[i].name, stat_name))
91 return emac->pa_stats[icssg_all_pa_stats[i].offset / sizeof(u32)];
92 }
93 }
94
95 netdev_err(emac->ndev, "Invalid stats %s\n", stat_name);
96 return -EINVAL;
97 }
98