cachepc-linux

Fork of AMDESE/linux with modifications for CachePC side-channel attack
git clone https://git.sinitax.com/sinitax/cachepc-linux
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dpaa_eth_sysfs.c (3152B)

      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	int i = 0;
     39
     40	list_for_each_entry_safe(fq, tmp, &priv->dpaa_fq_list, list) {
     41		switch (fq->fq_type) {
     42		case FQ_TYPE_RX_DEFAULT:
     43			str = "Rx default";
     44			break;
     45		case FQ_TYPE_RX_ERROR:
     46			str = "Rx error";
     47			break;
     48		case FQ_TYPE_RX_PCD:
     49			str = "Rx PCD";
     50			break;
     51		case FQ_TYPE_TX_CONFIRM:
     52			str = "Tx default confirmation";
     53			break;
     54		case FQ_TYPE_TX_CONF_MQ:
     55			str = "Tx confirmation (mq)";
     56			break;
     57		case FQ_TYPE_TX_ERROR:
     58			str = "Tx error";
     59			break;
     60		case FQ_TYPE_TX:
     61			str = "Tx";
     62			break;
     63		default:
     64			str = "Unknown";
     65		}
     66
     67		if (prev && (abs(fq->fqid - prev->fqid) != 1 ||
     68			     str != prevstr)) {
     69			if (last_fqid == first_fqid)
     70				bytes += sprintf(buf + bytes,
     71					"%s: %d\n", prevstr, prev->fqid);
     72			else
     73				bytes += sprintf(buf + bytes,
     74					"%s: %d - %d\n", prevstr,
     75					first_fqid, last_fqid);
     76		}
     77
     78		if (prev && abs(fq->fqid - prev->fqid) == 1 &&
     79		    str == prevstr) {
     80			last_fqid = fq->fqid;
     81		} else {
     82			first_fqid = fq->fqid;
     83			last_fqid = fq->fqid;
     84		}
     85
     86		prev = fq;
     87		prevstr = str;
     88		i++;
     89	}
     90
     91	if (prev) {
     92		if (last_fqid == first_fqid)
     93			bytes += sprintf(buf + bytes, "%s: %d\n", prevstr,
     94					prev->fqid);
     95		else
     96			bytes += sprintf(buf + bytes, "%s: %d - %d\n", prevstr,
     97					first_fqid, last_fqid);
     98	}
     99
    100	return bytes;
    101}
    102
    103static ssize_t dpaa_eth_show_bpids(struct device *dev,
    104				   struct device_attribute *attr, char *buf)
    105{
    106	struct dpaa_priv *priv = netdev_priv(to_net_dev(dev));
    107	ssize_t bytes = 0;
    108
    109	bytes += snprintf(buf + bytes, PAGE_SIZE - bytes, "%u\n",
    110				  priv->dpaa_bp->bpid);
    111
    112	return bytes;
    113}
    114
    115static struct device_attribute dpaa_eth_attrs[] = {
    116	__ATTR(device_addr, 0444, dpaa_eth_show_addr, NULL),
    117	__ATTR(fqids, 0444, dpaa_eth_show_fqids, NULL),
    118	__ATTR(bpids, 0444, dpaa_eth_show_bpids, NULL),
    119};
    120
    121void dpaa_eth_sysfs_init(struct device *dev)
    122{
    123	int i;
    124
    125	for (i = 0; i < ARRAY_SIZE(dpaa_eth_attrs); i++)
    126		if (device_create_file(dev, &dpaa_eth_attrs[i])) {
    127			dev_err(dev, "Error creating sysfs file\n");
    128			while (i > 0)
    129				device_remove_file(dev, &dpaa_eth_attrs[--i]);
    130			return;
    131		}
    132}
    133
    134void dpaa_eth_sysfs_remove(struct device *dev)
    135{
    136	int i;
    137
    138	for (i = 0; i < ARRAY_SIZE(dpaa_eth_attrs); i++)
    139		device_remove_file(dev, &dpaa_eth_attrs[i]);
    140}