drivers/net/ethernet/ti/icssg/icssg_stats.c

   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
  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
  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
  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 }