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// SPDX-License-Identifier: GPL-2.0
/* Texas Instruments ICSSG Ethernet driver
*
* Copyright (C) 2018-2021 Texas Instruments Incorporated - https://www.ti.com/
*
*/
#include "icssg_prueth.h"
#include "icssg_stats.h"
#include <linux/regmap.h>
#define ICSSG_TX_PACKET_OFFSET 0xA0
#define ICSSG_TX_BYTE_OFFSET 0xEC
static u32 stats_base[] = { 0x54c, /* Slice 0 stats start */
0xb18, /* Slice 1 stats start */
};
void emac_update_hardware_stats(struct prueth_emac *emac)
{
struct prueth *prueth = emac->prueth;
int slice = prueth_emac_slice(emac);
u32 base = stats_base[slice];
u32 tx_pkt_cnt = 0;
u32 val;
int i;
for (i = 0; i < ARRAY_SIZE(icssg_all_stats); i++) {
regmap_read(prueth->miig_rt,
base + icssg_all_stats[i].offset,
&val);
regmap_write(prueth->miig_rt,
base + icssg_all_stats[i].offset,
val);
if (icssg_all_stats[i].offset == ICSSG_TX_PACKET_OFFSET)
tx_pkt_cnt = val;
emac->stats[i] += val;
if (icssg_all_stats[i].offset == ICSSG_TX_BYTE_OFFSET)
emac->stats[i] -= tx_pkt_cnt * 8;
}
}
void emac_stats_work_handler(struct work_struct *work)
{
struct prueth_emac *emac = container_of(work, struct prueth_emac,
stats_work.work);
emac_update_hardware_stats(emac);
queue_delayed_work(system_long_wq, &emac->stats_work,
msecs_to_jiffies((STATS_TIME_LIMIT_1G_MS * 1000) / emac->speed));
}
int emac_get_stat_by_name(struct prueth_emac *emac, char *stat_name)
{
int i;
for (i = 0; i < ARRAY_SIZE(icssg_all_stats); i++) {
if (!strcmp(icssg_all_stats[i].name, stat_name))
return emac->stats[icssg_all_stats[i].offset / sizeof(u32)];
}
netdev_err(emac->ndev, "Invalid stats %s\n", stat_name);
return -EINVAL;
}
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