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         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
 103 static 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
 115 static 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
 121 void 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
 134 void 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 }