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 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, reg; 26 int i; 27 28 spin_lock(&prueth->stats_lock); 29 30 for (i = 0; i < ARRAY_SIZE(icssg_all_miig_stats); i++) { 31 regmap_read(prueth->miig_rt, 32 base + icssg_all_miig_stats[i].offset, 33 &val); 34 regmap_write(prueth->miig_rt, 35 base + icssg_all_miig_stats[i].offset, 36 val); 37 38 if (icssg_all_miig_stats[i].offset == ICSSG_TX_PACKET_OFFSET) 39 tx_pkt_cnt = val; 40 41 emac->stats[i] += val; 42 if (icssg_all_miig_stats[i].offset == ICSSG_TX_BYTE_OFFSET) 43 emac->stats[i] -= tx_pkt_cnt * 8; 44 } 45 46 if (prueth->pa_stats) { 47 for (i = 0; i < ARRAY_SIZE(icssg_all_pa_stats); i++) { 48 reg = icssg_all_pa_stats[i].offset + 49 slice * sizeof(u32); 50 regmap_read(prueth->pa_stats, reg, &val); 51 emac->pa_stats[i] += val; 52 } 53 } 54 55 spin_unlock(&prueth->stats_lock); 56 } 57 58 void icssg_stats_work_handler(struct work_struct *work) 59 { 60 struct prueth_emac *emac = container_of(work, struct prueth_emac, 61 stats_work.work); 62 emac_update_hardware_stats(emac); 63 64 queue_delayed_work(system_long_wq, &emac->stats_work, 65 msecs_to_jiffies((STATS_TIME_LIMIT_1G_MS * 1000) / emac->speed)); 66 } 67 EXPORT_SYMBOL_GPL(icssg_stats_work_handler); 68 69 int emac_get_stat_by_name(struct prueth_emac *emac, char *stat_name) 70 { 71 int i; 72 73 for (i = 0; i < ARRAY_SIZE(icssg_all_miig_stats); i++) { 74 if (!strcmp(icssg_all_miig_stats[i].name, stat_name)) 75 return emac->stats[icssg_all_miig_stats[i].offset / sizeof(u32)]; 76 } 77 78 if (emac->prueth->pa_stats) { 79 for (i = 0; i < ARRAY_SIZE(icssg_all_pa_stats); i++) { 80 if (!strcmp(icssg_all_pa_stats[i].name, stat_name)) 81 return emac->pa_stats[i]; 82 } 83 } 84 85 netdev_err(emac->ndev, "Invalid stats %s\n", stat_name); 86 return -EINVAL; 87 } 88