author | Florian Pose <fp@igh-essen.com> |
Wed, 25 Oct 2006 16:49:53 +0000 | |
changeset 444 | 31223539fc00 |
parent 294 | feea8d850c65 |
child 455 | 204c435fddf9 |
child 1732 | 1cc865ba17c2 |
permissions | -rw-r--r-- |
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/****************************************************************************** |
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2 |
* |
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* $Id$ |
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* |
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* Copyright (C) 2006 Florian Pose, Ingenieurgemeinschaft IgH |
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* |
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* This file is part of the IgH EtherCAT Master. |
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* |
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9 |
* The IgH EtherCAT Master is free software; you can redistribute it |
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* and/or modify it under the terms of the GNU General Public License |
246
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* as published by the Free Software Foundation; either version 2 of the |
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* License, or (at your option) any later version. |
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* |
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14 |
* The IgH EtherCAT Master is distributed in the hope that it will be |
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* useful, but WITHOUT ANY WARRANTY; without even the implied warranty of |
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* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the |
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* GNU General Public License for more details. |
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* |
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* You should have received a copy of the GNU General Public License |
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20 |
* along with the IgH EtherCAT Master; if not, write to the Free Software |
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21 |
* Foundation, Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA |
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* |
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23 |
* The right to use EtherCAT Technology is granted and comes free of |
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24 |
* charge under condition of compatibility of product made by |
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25 |
* Licensee. People intending to distribute/sell products based on the |
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26 |
* code, have to sign an agreement to guarantee that products using |
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Changed license headers and added EtherCAT license notice.
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27 |
* software based on IgH EtherCAT master stay compatible with the actual |
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* EtherCAT specification (which are released themselves as an open |
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* standard) as the (only) precondition to have the right to use EtherCAT |
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* Technology, IP and trade marks. |
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* |
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*****************************************************************************/ |
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|
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/** |
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\file |
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Ethernet interface for debugging purposes. |
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*/ |
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|
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/*****************************************************************************/ |
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Applied include patch by M. Schwerin.
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#include <linux/netdevice.h> |
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#include <linux/etherdevice.h> |
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|
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#include "globals.h" |
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45 |
#include "debug.h" |
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46 |
|
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47 |
/*****************************************************************************/ |
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48 |
|
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49 |
// net_device functions |
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50 |
int ec_dbgdev_open(struct net_device *); |
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51 |
int ec_dbgdev_stop(struct net_device *); |
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52 |
struct net_device_stats *ec_dbgdev_stats(struct net_device *); |
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53 |
|
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54 |
/*****************************************************************************/ |
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55 |
|
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56 |
/** |
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57 |
Debug constructor. |
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58 |
Initializes the debug object, creates a net_device and registeres it. |
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59 |
*/ |
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60 |
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61 |
int ec_debug_init(ec_debug_t *dbg /**< debug object */) |
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62 |
{ |
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63 |
int result; |
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64 |
|
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65 |
dbg->opened = 0; |
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66 |
memset(&dbg->stats, 0, sizeof(struct net_device_stats)); |
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67 |
|
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68 |
if (!(dbg->dev = |
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69 |
alloc_netdev(sizeof(ec_debug_t *), "ec%d", ether_setup))) { |
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70 |
EC_ERR("Unable to allocate net_device for debug object!\n"); |
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71 |
goto out_return; |
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72 |
} |
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73 |
|
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74 |
// initialize net_device |
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75 |
dbg->dev->open = ec_dbgdev_open; |
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76 |
dbg->dev->stop = ec_dbgdev_stop; |
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77 |
dbg->dev->get_stats = ec_dbgdev_stats; |
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78 |
|
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79 |
// initialize private data |
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80 |
*((ec_debug_t **) netdev_priv(dbg->dev)) = dbg; |
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81 |
|
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82 |
// connect the net_device to the kernel |
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83 |
if ((result = register_netdev(dbg->dev))) { |
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84 |
EC_ERR("Unable to register net_device: error %i\n", result); |
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85 |
goto out_free; |
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86 |
} |
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87 |
|
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88 |
return 0; |
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89 |
|
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90 |
out_free: |
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|
91 |
free_netdev(dbg->dev); |
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92 |
dbg->dev = NULL; |
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93 |
out_return: |
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|
94 |
return -1; |
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95 |
} |
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96 |
|
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97 |
/*****************************************************************************/ |
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98 |
|
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99 |
/** |
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100 |
Debug destructor. |
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101 |
Unregisteres the net_device and frees allocated memory. |
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102 |
*/ |
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103 |
|
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104 |
void ec_debug_clear(ec_debug_t *dbg /**< debug object */) |
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105 |
{ |
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106 |
if (dbg->dev) { |
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107 |
unregister_netdev(dbg->dev); |
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|
108 |
free_netdev(dbg->dev); |
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109 |
} |
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110 |
} |
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111 |
|
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112 |
/*****************************************************************************/ |
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113 |
|
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114 |
/** |
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115 |
Sends frame data to the interface. |
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116 |
*/ |
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117 |
|
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118 |
void ec_debug_send(ec_debug_t *dbg, /**< debug object */ |
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119 |
const uint8_t *data, /**< frame data */ |
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120 |
size_t size /**< size of the frame data */ |
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121 |
) |
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122 |
{ |
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123 |
struct sk_buff *skb; |
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124 |
|
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125 |
if (!dbg->opened) return; |
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126 |
|
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127 |
// allocate socket buffer |
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128 |
if (!(skb = dev_alloc_skb(size))) { |
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129 |
dbg->stats.rx_dropped++; |
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130 |
return; |
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131 |
} |
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// copy frame contents into socket buffer |
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memcpy(skb_put(skb, size), data, size); |
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|
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// update device statistics |
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dbg->stats.rx_packets++; |
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dbg->stats.rx_bytes += size; |
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|
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// pass socket buffer to network stack |
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skb->dev = dbg->dev; |
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skb->protocol = eth_type_trans(skb, dbg->dev); |
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skb->ip_summed = CHECKSUM_UNNECESSARY; |
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netif_rx(skb); |
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} |
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|
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/****************************************************************************** |
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* NET_DEVICE functions |
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*****************************************************************************/ |
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|
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/** |
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Opens the virtual network device. |
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*/ |
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154 |
|
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int ec_dbgdev_open(struct net_device *dev /**< debug net_device */) |
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{ |
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ec_debug_t *dbg = *((ec_debug_t **) netdev_priv(dev)); |
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dbg->opened = 1; |
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EC_INFO("debug interface %s opened.\n", dev->name); |
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return 0; |
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161 |
} |
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|
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/*****************************************************************************/ |
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|
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165 |
/** |
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Stops the virtual network device. |
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167 |
*/ |
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168 |
|
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int ec_dbgdev_stop(struct net_device *dev /**< debug net_device */) |
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{ |
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ec_debug_t *dbg = *((ec_debug_t **) netdev_priv(dev)); |
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dbg->opened = 0; |
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EC_INFO("debug interface %s stopped.\n", dev->name); |
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return 0; |
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175 |
} |
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|
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177 |
/*****************************************************************************/ |
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|
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179 |
/** |
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Gets statistics about the virtual network device. |
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181 |
*/ |
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|
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183 |
struct net_device_stats *ec_dbgdev_stats(struct net_device *dev |
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/**< debug net_device */) |
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185 |
{ |
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ec_debug_t *dbg = *((ec_debug_t **) netdev_priv(dev)); |
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187 |
return &dbg->stats; |
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188 |
} |
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189 |
|
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190 |
/*****************************************************************************/ |