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; 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 45 void icssg_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 EXPORT_SYMBOL_GPL(icssg_stats_work_handler); 55 56 int emac_get_stat_by_name(struct prueth_emac *emac, char *stat_name) 57 { 58 int i; 59 60 for (i = 0; i < ARRAY_SIZE(icssg_all_stats); i++) { 61 if (!strcmp(icssg_all_stats[i].name, stat_name)) 62 return emac->stats[icssg_all_stats[i].offset / sizeof(u32)]; 63 } 64 65 netdev_err(emac->ndev, "Invalid stats %s\n", stat_name); 66 return -EINVAL; 67 } 68