drivers/net/ethernet/freescale/dpaa/dpaa_eth_sysfs.c

   1 /* Copyright 2008-2016 Freescale Semiconductor Inc.
   2  *
   3  * Redistribution and use in source and binary forms, with or without
   4  * modification, are permitted provided that the following conditions are met:
   5  *     * Redistributions of source code must retain the above copyright
   6  *       notice, this list of conditions and the following disclaimer.
   7  *     * Redistributions in binary form must reproduce the above copyright
   8  *       notice, this list of conditions and the following disclaimer in the
   9  *       documentation and/or other materials provided with the distribution.
  10  *     * Neither the name of Freescale Semiconductor nor the
  11  *       names of its contributors may be used to endorse or promote products
  12  *       derived from this software without specific prior written permission.
  13  *
  14  *
  15  * ALTERNATIVELY, this software may be distributed under the terms of the
  16  * GNU General Public License ("GPL") as published by the Free Software
  17  * Foundation, either version 2 of that License or (at your option) any
  18  * later version.
  19  *
  20  * THIS SOFTWARE IS PROVIDED BY Freescale Semiconductor ``AS IS'' AND ANY
  21  * EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED
  22  * WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE
  23  * DISCLAIMED. IN NO EVENT SHALL Freescale Semiconductor BE LIABLE FOR ANY
  24  * DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES
  25  * (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES;
  26  * LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND
  27  * ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
  28  * (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF THIS
  29  * SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
  30  */
  31
  32 #include <linux/init.h>
  33 #include <linux/module.h>
  34 #include <linux/io.h>
  35 #include <linux/of_net.h>
  36 #include "dpaa_eth.h"
  37 #include "mac.h"
  38
  39 static ssize_t dpaa_eth_show_addr(struct device *dev,
  40                                   struct device_attribute *attr, char *buf)
  41 {
  42         struct dpaa_priv *priv = netdev_priv(to_net_dev(dev));
  43         struct mac_device *mac_dev = priv->mac_dev;
  44
  45         if (mac_dev)
  46                 return sprintf(buf, "%llx",
  47                                 (unsigned long long)mac_dev->res->start);
  48         else
  49                 return sprintf(buf, "none");
  50 }
  51
  52 static ssize_t dpaa_eth_show_fqids(struct device *dev,
  53                                    struct device_attribute *attr, char *buf)
  54 {
  55         struct dpaa_priv *priv = netdev_priv(to_net_dev(dev));
  56         struct dpaa_fq *prev = NULL;
  57         char *prevstr = NULL;
  58         struct dpaa_fq *tmp;
  59         struct dpaa_fq *fq;
  60         u32 first_fqid = 0;
  61         u32 last_fqid = 0;
  62         ssize_t bytes = 0;
  63         char *str;
  64         int i = 0;
  65
  66         list_for_each_entry_safe(fq, tmp, &priv->dpaa_fq_list, list) {
  67                 switch (fq->fq_type) {
  68                 case FQ_TYPE_RX_DEFAULT:
  69                         str = "Rx default";
  70                         break;
  71                 case FQ_TYPE_RX_ERROR:
  72                         str = "Rx error";
  73                         break;
  74                 case FQ_TYPE_RX_PCD:
  75                         str = "Rx PCD";
  76                         break;
  77                 case FQ_TYPE_TX_CONFIRM:
  78                         str = "Tx default confirmation";
  79                         break;
  80                 case FQ_TYPE_TX_CONF_MQ:
  81                         str = "Tx confirmation (mq)";
  82                         break;
  83                 case FQ_TYPE_TX_ERROR:
  84                         str = "Tx error";
  85                         break;
  86                 case FQ_TYPE_TX:
  87                         str = "Tx";
  88                         break;
  89                 default:
  90                         str = "Unknown";
  91                 }
  92
  93                 if (prev && (abs(fq->fqid - prev->fqid) != 1 ||
  94                              str != prevstr)) {
  95                         if (last_fqid == first_fqid)
  96                                 bytes += sprintf(buf + bytes,
  97                                         "%s: %d\n", prevstr, prev->fqid);
  98                         else
  99                                 bytes += sprintf(buf + bytes,
 100                                         "%s: %d - %d\n", prevstr,
 101                                         first_fqid, last_fqid);
 102                 }
 103
 104                 if (prev && abs(fq->fqid - prev->fqid) == 1 &&
 105                     str == prevstr) {
 106                         last_fqid = fq->fqid;
 107                 } else {
 108                         first_fqid = fq->fqid;
 109                         last_fqid = fq->fqid;
 110                 }
 111
 112                 prev = fq;
 113                 prevstr = str;
 114                 i++;
 115         }
 116
 117         if (prev) {
 118                 if (last_fqid == first_fqid)
 119                         bytes += sprintf(buf + bytes, "%s: %d\n", prevstr,
 120                                         prev->fqid);
 121                 else
 122                         bytes += sprintf(buf + bytes, "%s: %d - %d\n", prevstr,
 123                                         first_fqid, last_fqid);
 124         }
 125
 126         return bytes;
 127 }
 128
 129 static ssize_t dpaa_eth_show_bpids(struct device *dev,
 130                                    struct device_attribute *attr, char *buf)
 131 {
 132         struct dpaa_priv *priv = netdev_priv(to_net_dev(dev));
 133         ssize_t bytes = 0;
 134
 135         bytes += snprintf(buf + bytes, PAGE_SIZE - bytes, "%u\n",
 136                                   priv->dpaa_bp->bpid);
 137
 138         return bytes;
 139 }
 140
 141 static struct device_attribute dpaa_eth_attrs[] = {
 142         __ATTR(device_addr, 0444, dpaa_eth_show_addr, NULL),
 143         __ATTR(fqids, 0444, dpaa_eth_show_fqids, NULL),
 144         __ATTR(bpids, 0444, dpaa_eth_show_bpids, NULL),
 145 };
 146
 147 void dpaa_eth_sysfs_init(struct device *dev)
 148 {
 149         int i;
 150
 151         for (i = 0; i < ARRAY_SIZE(dpaa_eth_attrs); i++)
 152                 if (device_create_file(dev, &dpaa_eth_attrs[i])) {
 153                         dev_err(dev, "Error creating sysfs file\n");
 154                         while (i > 0)
 155                                 device_remove_file(dev, &dpaa_eth_attrs[--i]);
 156                         return;
 157                 }
 158 }
 159
 160 void dpaa_eth_sysfs_remove(struct device *dev)
 161 {
 162         int i;
 163
 164         for (i = 0; i < ARRAY_SIZE(dpaa_eth_attrs); i++)
 165                 device_remove_file(dev, &dpaa_eth_attrs[i]);
 166 }