dpaa_eth_sysfs.c

  1// SPDX-License-Identifier: BSD-3-Clause OR GPL-2.0-or-later
  2/*
  3 * Copyright 2008 - 2016 Freescale Semiconductor Inc.
  4 */
  5
  6#include <linux/init.h>
  7#include <linux/module.h>
  8#include <linux/io.h>
  9#include <linux/of_net.h>
 10#include "dpaa_eth.h"
 11#include "mac.h"
 12
 13static ssize_t dpaa_eth_show_addr(struct device *dev,
 14				  struct device_attribute *attr, char *buf)
 15{
 16	struct dpaa_priv *priv = netdev_priv(to_net_dev(dev));
 17	struct mac_device *mac_dev = priv->mac_dev;
 18
 19	if (mac_dev)
 20		return sprintf(buf, "%llx",
 21				(unsigned long long)mac_dev->res->start);
 22	else
 23		return sprintf(buf, "none");
 24}
 25
 26static ssize_t dpaa_eth_show_fqids(struct device *dev,
 27				   struct device_attribute *attr, char *buf)
 28{
 29	struct dpaa_priv *priv = netdev_priv(to_net_dev(dev));
 30	struct dpaa_fq *prev = NULL;
 31	char *prevstr = NULL;
 32	struct dpaa_fq *tmp;
 33	struct dpaa_fq *fq;
 34	u32 first_fqid = 0;
 35	u32 last_fqid = 0;
 36	ssize_t bytes = 0;
 37	char *str;
 38
 39	list_for_each_entry_safe(fq, tmp, &priv->dpaa_fq_list, list) {
 40		switch (fq->fq_type) {
 41		case FQ_TYPE_RX_DEFAULT:
 42			str = "Rx default";
 43			break;
 44		case FQ_TYPE_RX_ERROR:
 45			str = "Rx error";
 46			break;
 47		case FQ_TYPE_RX_PCD:
 48			str = "Rx PCD";
 49			break;
 50		case FQ_TYPE_TX_CONFIRM:
 51			str = "Tx default confirmation";
 52			break;
 53		case FQ_TYPE_TX_CONF_MQ:
 54			str = "Tx confirmation (mq)";
 55			break;
 56		case FQ_TYPE_TX_ERROR:
 57			str = "Tx error";
 58			break;
 59		case FQ_TYPE_TX:
 60			str = "Tx";
 61			break;
 62		default:
 63			str = "Unknown";
 64		}
 65
 66		if (prev && (abs(fq->fqid - prev->fqid) != 1 ||
 67			     str != prevstr)) {
 68			if (last_fqid == first_fqid)
 69				bytes += sprintf(buf + bytes,
 70					"%s: %d\n", prevstr, prev->fqid);
 71			else
 72				bytes += sprintf(buf + bytes,
 73					"%s: %d - %d\n", prevstr,
 74					first_fqid, last_fqid);
 75		}
 76
 77		if (prev && abs(fq->fqid - prev->fqid) == 1 &&
 78		    str == prevstr) {
 79			last_fqid = fq->fqid;
 80		} else {
 81			first_fqid = fq->fqid;
 82			last_fqid = fq->fqid;
 83		}
 84
 85		prev = fq;
 86		prevstr = str;
 87	}
 88
 89	if (prev) {
 90		if (last_fqid == first_fqid)
 91			bytes += sprintf(buf + bytes, "%s: %d\n", prevstr,
 92					prev->fqid);
 93		else
 94			bytes += sprintf(buf + bytes, "%s: %d - %d\n", prevstr,
 95					first_fqid, last_fqid);
 96	}
 97
 98	return bytes;
 99}
100
101static ssize_t dpaa_eth_show_bpids(struct device *dev,
102				   struct device_attribute *attr, char *buf)
103{
104	struct dpaa_priv *priv = netdev_priv(to_net_dev(dev));
105	ssize_t bytes = 0;
106
107	bytes += snprintf(buf + bytes, PAGE_SIZE - bytes, "%u\n",
108				  priv->dpaa_bp->bpid);
109
110	return bytes;
111}
112
113static struct device_attribute dpaa_eth_attrs[] = {
114	__ATTR(device_addr, 0444, dpaa_eth_show_addr, NULL),
115	__ATTR(fqids, 0444, dpaa_eth_show_fqids, NULL),
116	__ATTR(bpids, 0444, dpaa_eth_show_bpids, NULL),
117};
118
119void dpaa_eth_sysfs_init(struct device *dev)
120{
121	int i;
122
123	for (i = 0; i < ARRAY_SIZE(dpaa_eth_attrs); i++)
124		if (device_create_file(dev, &dpaa_eth_attrs[i])) {
125			dev_err(dev, "Error creating sysfs file\n");
126			while (i > 0)
127				device_remove_file(dev, &dpaa_eth_attrs[--i]);
128			return;
129		}
130}
131
132void dpaa_eth_sysfs_remove(struct device *dev)
133{
134	int i;
135
136	for (i = 0; i < ARRAY_SIZE(dpaa_eth_attrs); i++)
137		device_remove_file(dev, &dpaa_eth_attrs[i]);
138}