drivers/net/ethernet/freescale/dpaa/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
  13 static 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
  26 static 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
 101 static 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
 113 static 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
 119 void 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
 132 void 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 }