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1 /******************************************************************************* |
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2 |
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3 Intel PRO/1000 Linux driver |
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4 Copyright(c) 1999 - 2006 Intel Corporation. |
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5 |
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6 This program is free software; you can redistribute it and/or modify it |
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7 under the terms and conditions of the GNU General Public License, |
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8 version 2, as published by the Free Software Foundation. |
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9 |
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10 This program is distributed in the hope it will be useful, but WITHOUT |
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11 ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or |
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12 FITNESS FOR A PARTICULAR PURPOSE. See the GNU General Public License for |
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13 more details. |
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14 |
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15 You should have received a copy of the GNU General Public License along with |
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16 this program; if not, write to the Free Software Foundation, Inc., |
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17 51 Franklin St - Fifth Floor, Boston, MA 02110-1301 USA. |
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18 |
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19 The full GNU General Public License is included in this distribution in |
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20 the file called "COPYING". |
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21 |
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22 Contact Information: |
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23 Linux NICS <linux.nics@intel.com> |
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24 e1000-devel Mailing List <e1000-devel@lists.sourceforge.net> |
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25 Intel Corporation, 5200 N.E. Elam Young Parkway, Hillsboro, OR 97124-6497 |
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26 |
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27 *******************************************************************************/ |
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28 |
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29 #include "e1000.h" |
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30 #include <net/ip6_checksum.h> |
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31 |
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32 char e1000_driver_name[] = "e1000"; |
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33 static char e1000_driver_string[] = "Intel(R) PRO/1000 Network Driver"; |
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34 #define DRV_VERSION "7.3.21-k5-NAPI" |
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35 const char e1000_driver_version[] = DRV_VERSION; |
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36 static const char e1000_copyright[] = "Copyright (c) 1999-2006 Intel Corporation."; |
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37 |
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38 /* e1000_pci_tbl - PCI Device ID Table |
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39 * |
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40 * Last entry must be all 0s |
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41 * |
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42 * Macro expands to... |
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43 * {PCI_DEVICE(PCI_VENDOR_ID_INTEL, device_id)} |
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44 */ |
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45 static struct pci_device_id e1000_pci_tbl[] = { |
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46 INTEL_E1000_ETHERNET_DEVICE(0x1000), |
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47 INTEL_E1000_ETHERNET_DEVICE(0x1001), |
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48 INTEL_E1000_ETHERNET_DEVICE(0x1004), |
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49 INTEL_E1000_ETHERNET_DEVICE(0x1008), |
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50 INTEL_E1000_ETHERNET_DEVICE(0x1009), |
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51 INTEL_E1000_ETHERNET_DEVICE(0x100C), |
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52 INTEL_E1000_ETHERNET_DEVICE(0x100D), |
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53 INTEL_E1000_ETHERNET_DEVICE(0x100E), |
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54 INTEL_E1000_ETHERNET_DEVICE(0x100F), |
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55 INTEL_E1000_ETHERNET_DEVICE(0x1010), |
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56 INTEL_E1000_ETHERNET_DEVICE(0x1011), |
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57 INTEL_E1000_ETHERNET_DEVICE(0x1012), |
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58 INTEL_E1000_ETHERNET_DEVICE(0x1013), |
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59 INTEL_E1000_ETHERNET_DEVICE(0x1014), |
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60 INTEL_E1000_ETHERNET_DEVICE(0x1015), |
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61 INTEL_E1000_ETHERNET_DEVICE(0x1016), |
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62 INTEL_E1000_ETHERNET_DEVICE(0x1017), |
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63 INTEL_E1000_ETHERNET_DEVICE(0x1018), |
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64 INTEL_E1000_ETHERNET_DEVICE(0x1019), |
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65 INTEL_E1000_ETHERNET_DEVICE(0x101A), |
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66 INTEL_E1000_ETHERNET_DEVICE(0x101D), |
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67 INTEL_E1000_ETHERNET_DEVICE(0x101E), |
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68 INTEL_E1000_ETHERNET_DEVICE(0x1026), |
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69 INTEL_E1000_ETHERNET_DEVICE(0x1027), |
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70 INTEL_E1000_ETHERNET_DEVICE(0x1028), |
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71 INTEL_E1000_ETHERNET_DEVICE(0x1075), |
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72 INTEL_E1000_ETHERNET_DEVICE(0x1076), |
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73 INTEL_E1000_ETHERNET_DEVICE(0x1077), |
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74 INTEL_E1000_ETHERNET_DEVICE(0x1078), |
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75 INTEL_E1000_ETHERNET_DEVICE(0x1079), |
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76 INTEL_E1000_ETHERNET_DEVICE(0x107A), |
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77 INTEL_E1000_ETHERNET_DEVICE(0x107B), |
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78 INTEL_E1000_ETHERNET_DEVICE(0x107C), |
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79 INTEL_E1000_ETHERNET_DEVICE(0x108A), |
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80 INTEL_E1000_ETHERNET_DEVICE(0x1099), |
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81 INTEL_E1000_ETHERNET_DEVICE(0x10B5), |
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82 /* required last entry */ |
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83 {0,} |
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84 }; |
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85 |
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86 MODULE_DEVICE_TABLE(pci, e1000_pci_tbl); |
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87 |
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88 int e1000_up(struct e1000_adapter *adapter); |
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89 void e1000_down(struct e1000_adapter *adapter); |
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90 void e1000_reinit_locked(struct e1000_adapter *adapter); |
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91 void e1000_reset(struct e1000_adapter *adapter); |
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92 int e1000_set_spd_dplx(struct e1000_adapter *adapter, u16 spddplx); |
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93 int e1000_setup_all_tx_resources(struct e1000_adapter *adapter); |
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94 int e1000_setup_all_rx_resources(struct e1000_adapter *adapter); |
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95 void e1000_free_all_tx_resources(struct e1000_adapter *adapter); |
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96 void e1000_free_all_rx_resources(struct e1000_adapter *adapter); |
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97 static int e1000_setup_tx_resources(struct e1000_adapter *adapter, |
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98 struct e1000_tx_ring *txdr); |
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99 static int e1000_setup_rx_resources(struct e1000_adapter *adapter, |
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100 struct e1000_rx_ring *rxdr); |
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101 static void e1000_free_tx_resources(struct e1000_adapter *adapter, |
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102 struct e1000_tx_ring *tx_ring); |
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103 static void e1000_free_rx_resources(struct e1000_adapter *adapter, |
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104 struct e1000_rx_ring *rx_ring); |
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105 void e1000_update_stats(struct e1000_adapter *adapter); |
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106 |
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107 static int e1000_init_module(void); |
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108 static void e1000_exit_module(void); |
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109 static int e1000_probe(struct pci_dev *pdev, const struct pci_device_id *ent); |
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110 static void __devexit e1000_remove(struct pci_dev *pdev); |
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111 static int e1000_alloc_queues(struct e1000_adapter *adapter); |
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112 static int e1000_sw_init(struct e1000_adapter *adapter); |
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113 static int e1000_open(struct net_device *netdev); |
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114 static int e1000_close(struct net_device *netdev); |
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115 static void e1000_configure_tx(struct e1000_adapter *adapter); |
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116 static void e1000_configure_rx(struct e1000_adapter *adapter); |
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117 static void e1000_setup_rctl(struct e1000_adapter *adapter); |
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118 static void e1000_clean_all_tx_rings(struct e1000_adapter *adapter); |
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119 static void e1000_clean_all_rx_rings(struct e1000_adapter *adapter); |
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120 static void e1000_clean_tx_ring(struct e1000_adapter *adapter, |
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121 struct e1000_tx_ring *tx_ring); |
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122 static void e1000_clean_rx_ring(struct e1000_adapter *adapter, |
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123 struct e1000_rx_ring *rx_ring); |
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124 static void e1000_set_rx_mode(struct net_device *netdev); |
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125 static void e1000_update_phy_info(unsigned long data); |
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126 static void e1000_watchdog(unsigned long data); |
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127 static void e1000_82547_tx_fifo_stall(unsigned long data); |
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128 static netdev_tx_t e1000_xmit_frame(struct sk_buff *skb, |
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129 struct net_device *netdev); |
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130 static struct net_device_stats * e1000_get_stats(struct net_device *netdev); |
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131 static int e1000_change_mtu(struct net_device *netdev, int new_mtu); |
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132 static int e1000_set_mac(struct net_device *netdev, void *p); |
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133 static irqreturn_t e1000_intr(int irq, void *data); |
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134 static bool e1000_clean_tx_irq(struct e1000_adapter *adapter, |
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135 struct e1000_tx_ring *tx_ring); |
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136 static int e1000_clean(struct napi_struct *napi, int budget); |
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137 static bool e1000_clean_rx_irq(struct e1000_adapter *adapter, |
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138 struct e1000_rx_ring *rx_ring, |
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139 int *work_done, int work_to_do); |
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140 static bool e1000_clean_jumbo_rx_irq(struct e1000_adapter *adapter, |
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141 struct e1000_rx_ring *rx_ring, |
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142 int *work_done, int work_to_do); |
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143 static void e1000_alloc_rx_buffers(struct e1000_adapter *adapter, |
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144 struct e1000_rx_ring *rx_ring, |
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145 int cleaned_count); |
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146 static void e1000_alloc_jumbo_rx_buffers(struct e1000_adapter *adapter, |
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147 struct e1000_rx_ring *rx_ring, |
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148 int cleaned_count); |
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149 static int e1000_ioctl(struct net_device *netdev, struct ifreq *ifr, int cmd); |
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150 static int e1000_mii_ioctl(struct net_device *netdev, struct ifreq *ifr, |
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151 int cmd); |
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152 static void e1000_enter_82542_rst(struct e1000_adapter *adapter); |
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153 static void e1000_leave_82542_rst(struct e1000_adapter *adapter); |
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154 static void e1000_tx_timeout(struct net_device *dev); |
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155 static void e1000_reset_task(struct work_struct *work); |
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156 static void e1000_smartspeed(struct e1000_adapter *adapter); |
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157 static int e1000_82547_fifo_workaround(struct e1000_adapter *adapter, |
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158 struct sk_buff *skb); |
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159 |
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160 static void e1000_vlan_rx_register(struct net_device *netdev, struct vlan_group *grp); |
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161 static void e1000_vlan_rx_add_vid(struct net_device *netdev, u16 vid); |
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162 static void e1000_vlan_rx_kill_vid(struct net_device *netdev, u16 vid); |
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163 static void e1000_restore_vlan(struct e1000_adapter *adapter); |
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164 |
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165 #ifdef CONFIG_PM |
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166 static int e1000_suspend(struct pci_dev *pdev, pm_message_t state); |
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167 static int e1000_resume(struct pci_dev *pdev); |
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168 #endif |
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169 static void e1000_shutdown(struct pci_dev *pdev); |
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170 |
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171 #ifdef CONFIG_NET_POLL_CONTROLLER |
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172 /* for netdump / net console */ |
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173 static void e1000_netpoll (struct net_device *netdev); |
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174 #endif |
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175 |
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176 #define COPYBREAK_DEFAULT 256 |
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177 static unsigned int copybreak __read_mostly = COPYBREAK_DEFAULT; |
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178 module_param(copybreak, uint, 0644); |
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179 MODULE_PARM_DESC(copybreak, |
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180 "Maximum size of packet that is copied to a new buffer on receive"); |
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181 |
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182 static pci_ers_result_t e1000_io_error_detected(struct pci_dev *pdev, |
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183 pci_channel_state_t state); |
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184 static pci_ers_result_t e1000_io_slot_reset(struct pci_dev *pdev); |
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185 static void e1000_io_resume(struct pci_dev *pdev); |
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186 |
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187 static struct pci_error_handlers e1000_err_handler = { |
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188 .error_detected = e1000_io_error_detected, |
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189 .slot_reset = e1000_io_slot_reset, |
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190 .resume = e1000_io_resume, |
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191 }; |
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192 |
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193 static struct pci_driver e1000_driver = { |
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194 .name = e1000_driver_name, |
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195 .id_table = e1000_pci_tbl, |
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196 .probe = e1000_probe, |
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197 .remove = __devexit_p(e1000_remove), |
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198 #ifdef CONFIG_PM |
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199 /* Power Managment Hooks */ |
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200 .suspend = e1000_suspend, |
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201 .resume = e1000_resume, |
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202 #endif |
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203 .shutdown = e1000_shutdown, |
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204 .err_handler = &e1000_err_handler |
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205 }; |
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206 |
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207 MODULE_AUTHOR("Intel Corporation, <linux.nics@intel.com>"); |
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208 MODULE_DESCRIPTION("Intel(R) PRO/1000 Network Driver"); |
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209 MODULE_LICENSE("GPL"); |
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210 MODULE_VERSION(DRV_VERSION); |
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211 |
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212 static int debug = NETIF_MSG_DRV | NETIF_MSG_PROBE; |
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213 module_param(debug, int, 0); |
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214 MODULE_PARM_DESC(debug, "Debug level (0=none,...,16=all)"); |
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215 |
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216 /** |
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217 * e1000_init_module - Driver Registration Routine |
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218 * |
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219 * e1000_init_module is the first routine called when the driver is |
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220 * loaded. All it does is register with the PCI subsystem. |
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221 **/ |
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222 |
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223 static int __init e1000_init_module(void) |
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224 { |
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225 int ret; |
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226 printk(KERN_INFO "%s - version %s\n", |
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227 e1000_driver_string, e1000_driver_version); |
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228 |
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229 printk(KERN_INFO "%s\n", e1000_copyright); |
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230 |
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231 ret = pci_register_driver(&e1000_driver); |
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232 if (copybreak != COPYBREAK_DEFAULT) { |
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233 if (copybreak == 0) |
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234 printk(KERN_INFO "e1000: copybreak disabled\n"); |
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235 else |
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236 printk(KERN_INFO "e1000: copybreak enabled for " |
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237 "packets <= %u bytes\n", copybreak); |
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238 } |
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239 return ret; |
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240 } |
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241 |
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242 module_init(e1000_init_module); |
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243 |
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244 /** |
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245 * e1000_exit_module - Driver Exit Cleanup Routine |
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246 * |
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247 * e1000_exit_module is called just before the driver is removed |
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248 * from memory. |
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249 **/ |
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250 |
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251 static void __exit e1000_exit_module(void) |
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252 { |
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253 pci_unregister_driver(&e1000_driver); |
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254 } |
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255 |
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256 module_exit(e1000_exit_module); |
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257 |
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258 static int e1000_request_irq(struct e1000_adapter *adapter) |
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259 { |
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260 struct net_device *netdev = adapter->netdev; |
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261 irq_handler_t handler = e1000_intr; |
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262 int irq_flags = IRQF_SHARED; |
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263 int err; |
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264 |
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265 err = request_irq(adapter->pdev->irq, handler, irq_flags, netdev->name, |
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266 netdev); |
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267 if (err) { |
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268 DPRINTK(PROBE, ERR, |
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269 "Unable to allocate interrupt Error: %d\n", err); |
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270 } |
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271 |
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272 return err; |
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273 } |
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274 |
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275 static void e1000_free_irq(struct e1000_adapter *adapter) |
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276 { |
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277 struct net_device *netdev = adapter->netdev; |
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278 |
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279 free_irq(adapter->pdev->irq, netdev); |
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280 } |
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281 |
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282 /** |
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283 * e1000_irq_disable - Mask off interrupt generation on the NIC |
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284 * @adapter: board private structure |
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285 **/ |
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286 |
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287 static void e1000_irq_disable(struct e1000_adapter *adapter) |
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288 { |
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289 struct e1000_hw *hw = &adapter->hw; |
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290 |
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291 ew32(IMC, ~0); |
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292 E1000_WRITE_FLUSH(); |
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293 synchronize_irq(adapter->pdev->irq); |
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294 } |
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295 |
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296 /** |
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297 * e1000_irq_enable - Enable default interrupt generation settings |
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298 * @adapter: board private structure |
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299 **/ |
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300 |
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301 static void e1000_irq_enable(struct e1000_adapter *adapter) |
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302 { |
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303 struct e1000_hw *hw = &adapter->hw; |
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304 |
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305 ew32(IMS, IMS_ENABLE_MASK); |
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306 E1000_WRITE_FLUSH(); |
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307 } |
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308 |
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309 static void e1000_update_mng_vlan(struct e1000_adapter *adapter) |
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310 { |
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311 struct e1000_hw *hw = &adapter->hw; |
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312 struct net_device *netdev = adapter->netdev; |
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313 u16 vid = hw->mng_cookie.vlan_id; |
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314 u16 old_vid = adapter->mng_vlan_id; |
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315 if (adapter->vlgrp) { |
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316 if (!vlan_group_get_device(adapter->vlgrp, vid)) { |
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317 if (hw->mng_cookie.status & |
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318 E1000_MNG_DHCP_COOKIE_STATUS_VLAN_SUPPORT) { |
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319 e1000_vlan_rx_add_vid(netdev, vid); |
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320 adapter->mng_vlan_id = vid; |
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321 } else |
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322 adapter->mng_vlan_id = E1000_MNG_VLAN_NONE; |
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323 |
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324 if ((old_vid != (u16)E1000_MNG_VLAN_NONE) && |
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325 (vid != old_vid) && |
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326 !vlan_group_get_device(adapter->vlgrp, old_vid)) |
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327 e1000_vlan_rx_kill_vid(netdev, old_vid); |
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328 } else |
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329 adapter->mng_vlan_id = vid; |
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330 } |
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331 } |
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332 |
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333 static void e1000_init_manageability(struct e1000_adapter *adapter) |
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334 { |
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335 struct e1000_hw *hw = &adapter->hw; |
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336 |
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337 if (adapter->en_mng_pt) { |
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338 u32 manc = er32(MANC); |
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339 |
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340 /* disable hardware interception of ARP */ |
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341 manc &= ~(E1000_MANC_ARP_EN); |
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342 |
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343 ew32(MANC, manc); |
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344 } |
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345 } |
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346 |
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347 static void e1000_release_manageability(struct e1000_adapter *adapter) |
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348 { |
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349 struct e1000_hw *hw = &adapter->hw; |
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350 |
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351 if (adapter->en_mng_pt) { |
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352 u32 manc = er32(MANC); |
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353 |
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354 /* re-enable hardware interception of ARP */ |
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355 manc |= E1000_MANC_ARP_EN; |
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356 |
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357 ew32(MANC, manc); |
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358 } |
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359 } |
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360 |
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361 /** |
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362 * e1000_configure - configure the hardware for RX and TX |
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363 * @adapter = private board structure |
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364 **/ |
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365 static void e1000_configure(struct e1000_adapter *adapter) |
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366 { |
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367 struct net_device *netdev = adapter->netdev; |
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368 int i; |
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369 |
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370 e1000_set_rx_mode(netdev); |
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371 |
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372 e1000_restore_vlan(adapter); |
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373 e1000_init_manageability(adapter); |
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374 |
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375 e1000_configure_tx(adapter); |
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376 e1000_setup_rctl(adapter); |
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377 e1000_configure_rx(adapter); |
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378 /* call E1000_DESC_UNUSED which always leaves |
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379 * at least 1 descriptor unused to make sure |
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380 * next_to_use != next_to_clean */ |
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381 for (i = 0; i < adapter->num_rx_queues; i++) { |
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382 struct e1000_rx_ring *ring = &adapter->rx_ring[i]; |
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383 adapter->alloc_rx_buf(adapter, ring, |
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384 E1000_DESC_UNUSED(ring)); |
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385 } |
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386 |
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387 adapter->tx_queue_len = netdev->tx_queue_len; |
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388 } |
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389 |
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390 int e1000_up(struct e1000_adapter *adapter) |
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391 { |
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392 struct e1000_hw *hw = &adapter->hw; |
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393 |
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394 /* hardware has been reset, we need to reload some things */ |
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395 e1000_configure(adapter); |
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396 |
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397 clear_bit(__E1000_DOWN, &adapter->flags); |
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398 |
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399 napi_enable(&adapter->napi); |
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400 |
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401 e1000_irq_enable(adapter); |
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402 |
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403 netif_wake_queue(adapter->netdev); |
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404 |
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405 /* fire a link change interrupt to start the watchdog */ |
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406 ew32(ICS, E1000_ICS_LSC); |
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407 return 0; |
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408 } |
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409 |
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410 /** |
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411 * e1000_power_up_phy - restore link in case the phy was powered down |
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412 * @adapter: address of board private structure |
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413 * |
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414 * The phy may be powered down to save power and turn off link when the |
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415 * driver is unloaded and wake on lan is not enabled (among others) |
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416 * *** this routine MUST be followed by a call to e1000_reset *** |
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417 * |
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418 **/ |
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419 |
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420 void e1000_power_up_phy(struct e1000_adapter *adapter) |
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421 { |
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422 struct e1000_hw *hw = &adapter->hw; |
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423 u16 mii_reg = 0; |
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424 |
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425 /* Just clear the power down bit to wake the phy back up */ |
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426 if (hw->media_type == e1000_media_type_copper) { |
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427 /* according to the manual, the phy will retain its |
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428 * settings across a power-down/up cycle */ |
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429 e1000_read_phy_reg(hw, PHY_CTRL, &mii_reg); |
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430 mii_reg &= ~MII_CR_POWER_DOWN; |
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431 e1000_write_phy_reg(hw, PHY_CTRL, mii_reg); |
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432 } |
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433 } |
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434 |
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435 static void e1000_power_down_phy(struct e1000_adapter *adapter) |
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436 { |
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437 struct e1000_hw *hw = &adapter->hw; |
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438 |
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439 /* Power down the PHY so no link is implied when interface is down * |
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440 * The PHY cannot be powered down if any of the following is true * |
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441 * (a) WoL is enabled |
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442 * (b) AMT is active |
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443 * (c) SoL/IDER session is active */ |
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444 if (!adapter->wol && hw->mac_type >= e1000_82540 && |
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445 hw->media_type == e1000_media_type_copper) { |
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446 u16 mii_reg = 0; |
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447 |
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448 switch (hw->mac_type) { |
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449 case e1000_82540: |
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450 case e1000_82545: |
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451 case e1000_82545_rev_3: |
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452 case e1000_82546: |
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453 case e1000_82546_rev_3: |
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454 case e1000_82541: |
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455 case e1000_82541_rev_2: |
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456 case e1000_82547: |
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457 case e1000_82547_rev_2: |
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458 if (er32(MANC) & E1000_MANC_SMBUS_EN) |
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459 goto out; |
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460 break; |
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461 default: |
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462 goto out; |
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463 } |
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464 e1000_read_phy_reg(hw, PHY_CTRL, &mii_reg); |
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465 mii_reg |= MII_CR_POWER_DOWN; |
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466 e1000_write_phy_reg(hw, PHY_CTRL, mii_reg); |
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467 mdelay(1); |
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468 } |
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469 out: |
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470 return; |
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471 } |
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472 |
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473 void e1000_down(struct e1000_adapter *adapter) |
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474 { |
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475 struct e1000_hw *hw = &adapter->hw; |
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476 struct net_device *netdev = adapter->netdev; |
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477 u32 rctl, tctl; |
|
478 |
|
479 /* signal that we're down so the interrupt handler does not |
|
480 * reschedule our watchdog timer */ |
|
481 set_bit(__E1000_DOWN, &adapter->flags); |
|
482 |
|
483 /* disable receives in the hardware */ |
|
484 rctl = er32(RCTL); |
|
485 ew32(RCTL, rctl & ~E1000_RCTL_EN); |
|
486 /* flush and sleep below */ |
|
487 |
|
488 netif_tx_disable(netdev); |
|
489 |
|
490 /* disable transmits in the hardware */ |
|
491 tctl = er32(TCTL); |
|
492 tctl &= ~E1000_TCTL_EN; |
|
493 ew32(TCTL, tctl); |
|
494 /* flush both disables and wait for them to finish */ |
|
495 E1000_WRITE_FLUSH(); |
|
496 msleep(10); |
|
497 |
|
498 napi_disable(&adapter->napi); |
|
499 |
|
500 e1000_irq_disable(adapter); |
|
501 |
|
502 del_timer_sync(&adapter->tx_fifo_stall_timer); |
|
503 del_timer_sync(&adapter->watchdog_timer); |
|
504 del_timer_sync(&adapter->phy_info_timer); |
|
505 |
|
506 netdev->tx_queue_len = adapter->tx_queue_len; |
|
507 adapter->link_speed = 0; |
|
508 adapter->link_duplex = 0; |
|
509 netif_carrier_off(netdev); |
|
510 |
|
511 e1000_reset(adapter); |
|
512 e1000_clean_all_tx_rings(adapter); |
|
513 e1000_clean_all_rx_rings(adapter); |
|
514 } |
|
515 |
|
516 void e1000_reinit_locked(struct e1000_adapter *adapter) |
|
517 { |
|
518 WARN_ON(in_interrupt()); |
|
519 while (test_and_set_bit(__E1000_RESETTING, &adapter->flags)) |
|
520 msleep(1); |
|
521 e1000_down(adapter); |
|
522 e1000_up(adapter); |
|
523 clear_bit(__E1000_RESETTING, &adapter->flags); |
|
524 } |
|
525 |
|
526 void e1000_reset(struct e1000_adapter *adapter) |
|
527 { |
|
528 struct e1000_hw *hw = &adapter->hw; |
|
529 u32 pba = 0, tx_space, min_tx_space, min_rx_space; |
|
530 bool legacy_pba_adjust = false; |
|
531 u16 hwm; |
|
532 |
|
533 /* Repartition Pba for greater than 9k mtu |
|
534 * To take effect CTRL.RST is required. |
|
535 */ |
|
536 |
|
537 switch (hw->mac_type) { |
|
538 case e1000_82542_rev2_0: |
|
539 case e1000_82542_rev2_1: |
|
540 case e1000_82543: |
|
541 case e1000_82544: |
|
542 case e1000_82540: |
|
543 case e1000_82541: |
|
544 case e1000_82541_rev_2: |
|
545 legacy_pba_adjust = true; |
|
546 pba = E1000_PBA_48K; |
|
547 break; |
|
548 case e1000_82545: |
|
549 case e1000_82545_rev_3: |
|
550 case e1000_82546: |
|
551 case e1000_82546_rev_3: |
|
552 pba = E1000_PBA_48K; |
|
553 break; |
|
554 case e1000_82547: |
|
555 case e1000_82547_rev_2: |
|
556 legacy_pba_adjust = true; |
|
557 pba = E1000_PBA_30K; |
|
558 break; |
|
559 case e1000_undefined: |
|
560 case e1000_num_macs: |
|
561 break; |
|
562 } |
|
563 |
|
564 if (legacy_pba_adjust) { |
|
565 if (hw->max_frame_size > E1000_RXBUFFER_8192) |
|
566 pba -= 8; /* allocate more FIFO for Tx */ |
|
567 |
|
568 if (hw->mac_type == e1000_82547) { |
|
569 adapter->tx_fifo_head = 0; |
|
570 adapter->tx_head_addr = pba << E1000_TX_HEAD_ADDR_SHIFT; |
|
571 adapter->tx_fifo_size = |
|
572 (E1000_PBA_40K - pba) << E1000_PBA_BYTES_SHIFT; |
|
573 atomic_set(&adapter->tx_fifo_stall, 0); |
|
574 } |
|
575 } else if (hw->max_frame_size > ETH_FRAME_LEN + ETH_FCS_LEN) { |
|
576 /* adjust PBA for jumbo frames */ |
|
577 ew32(PBA, pba); |
|
578 |
|
579 /* To maintain wire speed transmits, the Tx FIFO should be |
|
580 * large enough to accommodate two full transmit packets, |
|
581 * rounded up to the next 1KB and expressed in KB. Likewise, |
|
582 * the Rx FIFO should be large enough to accommodate at least |
|
583 * one full receive packet and is similarly rounded up and |
|
584 * expressed in KB. */ |
|
585 pba = er32(PBA); |
|
586 /* upper 16 bits has Tx packet buffer allocation size in KB */ |
|
587 tx_space = pba >> 16; |
|
588 /* lower 16 bits has Rx packet buffer allocation size in KB */ |
|
589 pba &= 0xffff; |
|
590 /* |
|
591 * the tx fifo also stores 16 bytes of information about the tx |
|
592 * but don't include ethernet FCS because hardware appends it |
|
593 */ |
|
594 min_tx_space = (hw->max_frame_size + |
|
595 sizeof(struct e1000_tx_desc) - |
|
596 ETH_FCS_LEN) * 2; |
|
597 min_tx_space = ALIGN(min_tx_space, 1024); |
|
598 min_tx_space >>= 10; |
|
599 /* software strips receive CRC, so leave room for it */ |
|
600 min_rx_space = hw->max_frame_size; |
|
601 min_rx_space = ALIGN(min_rx_space, 1024); |
|
602 min_rx_space >>= 10; |
|
603 |
|
604 /* If current Tx allocation is less than the min Tx FIFO size, |
|
605 * and the min Tx FIFO size is less than the current Rx FIFO |
|
606 * allocation, take space away from current Rx allocation */ |
|
607 if (tx_space < min_tx_space && |
|
608 ((min_tx_space - tx_space) < pba)) { |
|
609 pba = pba - (min_tx_space - tx_space); |
|
610 |
|
611 /* PCI/PCIx hardware has PBA alignment constraints */ |
|
612 switch (hw->mac_type) { |
|
613 case e1000_82545 ... e1000_82546_rev_3: |
|
614 pba &= ~(E1000_PBA_8K - 1); |
|
615 break; |
|
616 default: |
|
617 break; |
|
618 } |
|
619 |
|
620 /* if short on rx space, rx wins and must trump tx |
|
621 * adjustment or use Early Receive if available */ |
|
622 if (pba < min_rx_space) |
|
623 pba = min_rx_space; |
|
624 } |
|
625 } |
|
626 |
|
627 ew32(PBA, pba); |
|
628 |
|
629 /* |
|
630 * flow control settings: |
|
631 * The high water mark must be low enough to fit one full frame |
|
632 * (or the size used for early receive) above it in the Rx FIFO. |
|
633 * Set it to the lower of: |
|
634 * - 90% of the Rx FIFO size, and |
|
635 * - the full Rx FIFO size minus the early receive size (for parts |
|
636 * with ERT support assuming ERT set to E1000_ERT_2048), or |
|
637 * - the full Rx FIFO size minus one full frame |
|
638 */ |
|
639 hwm = min(((pba << 10) * 9 / 10), |
|
640 ((pba << 10) - hw->max_frame_size)); |
|
641 |
|
642 hw->fc_high_water = hwm & 0xFFF8; /* 8-byte granularity */ |
|
643 hw->fc_low_water = hw->fc_high_water - 8; |
|
644 hw->fc_pause_time = E1000_FC_PAUSE_TIME; |
|
645 hw->fc_send_xon = 1; |
|
646 hw->fc = hw->original_fc; |
|
647 |
|
648 /* Allow time for pending master requests to run */ |
|
649 e1000_reset_hw(hw); |
|
650 if (hw->mac_type >= e1000_82544) |
|
651 ew32(WUC, 0); |
|
652 |
|
653 if (e1000_init_hw(hw)) |
|
654 DPRINTK(PROBE, ERR, "Hardware Error\n"); |
|
655 e1000_update_mng_vlan(adapter); |
|
656 |
|
657 /* if (adapter->hwflags & HWFLAGS_PHY_PWR_BIT) { */ |
|
658 if (hw->mac_type >= e1000_82544 && |
|
659 hw->autoneg == 1 && |
|
660 hw->autoneg_advertised == ADVERTISE_1000_FULL) { |
|
661 u32 ctrl = er32(CTRL); |
|
662 /* clear phy power management bit if we are in gig only mode, |
|
663 * which if enabled will attempt negotiation to 100Mb, which |
|
664 * can cause a loss of link at power off or driver unload */ |
|
665 ctrl &= ~E1000_CTRL_SWDPIN3; |
|
666 ew32(CTRL, ctrl); |
|
667 } |
|
668 |
|
669 /* Enable h/w to recognize an 802.1Q VLAN Ethernet packet */ |
|
670 ew32(VET, ETHERNET_IEEE_VLAN_TYPE); |
|
671 |
|
672 e1000_reset_adaptive(hw); |
|
673 e1000_phy_get_info(hw, &adapter->phy_info); |
|
674 |
|
675 e1000_release_manageability(adapter); |
|
676 } |
|
677 |
|
678 /** |
|
679 * Dump the eeprom for users having checksum issues |
|
680 **/ |
|
681 static void e1000_dump_eeprom(struct e1000_adapter *adapter) |
|
682 { |
|
683 struct net_device *netdev = adapter->netdev; |
|
684 struct ethtool_eeprom eeprom; |
|
685 const struct ethtool_ops *ops = netdev->ethtool_ops; |
|
686 u8 *data; |
|
687 int i; |
|
688 u16 csum_old, csum_new = 0; |
|
689 |
|
690 eeprom.len = ops->get_eeprom_len(netdev); |
|
691 eeprom.offset = 0; |
|
692 |
|
693 data = kmalloc(eeprom.len, GFP_KERNEL); |
|
694 if (!data) { |
|
695 printk(KERN_ERR "Unable to allocate memory to dump EEPROM" |
|
696 " data\n"); |
|
697 return; |
|
698 } |
|
699 |
|
700 ops->get_eeprom(netdev, &eeprom, data); |
|
701 |
|
702 csum_old = (data[EEPROM_CHECKSUM_REG * 2]) + |
|
703 (data[EEPROM_CHECKSUM_REG * 2 + 1] << 8); |
|
704 for (i = 0; i < EEPROM_CHECKSUM_REG * 2; i += 2) |
|
705 csum_new += data[i] + (data[i + 1] << 8); |
|
706 csum_new = EEPROM_SUM - csum_new; |
|
707 |
|
708 printk(KERN_ERR "/*********************/\n"); |
|
709 printk(KERN_ERR "Current EEPROM Checksum : 0x%04x\n", csum_old); |
|
710 printk(KERN_ERR "Calculated : 0x%04x\n", csum_new); |
|
711 |
|
712 printk(KERN_ERR "Offset Values\n"); |
|
713 printk(KERN_ERR "======== ======\n"); |
|
714 print_hex_dump(KERN_ERR, "", DUMP_PREFIX_OFFSET, 16, 1, data, 128, 0); |
|
715 |
|
716 printk(KERN_ERR "Include this output when contacting your support " |
|
717 "provider.\n"); |
|
718 printk(KERN_ERR "This is not a software error! Something bad " |
|
719 "happened to your hardware or\n"); |
|
720 printk(KERN_ERR "EEPROM image. Ignoring this " |
|
721 "problem could result in further problems,\n"); |
|
722 printk(KERN_ERR "possibly loss of data, corruption or system hangs!\n"); |
|
723 printk(KERN_ERR "The MAC Address will be reset to 00:00:00:00:00:00, " |
|
724 "which is invalid\n"); |
|
725 printk(KERN_ERR "and requires you to set the proper MAC " |
|
726 "address manually before continuing\n"); |
|
727 printk(KERN_ERR "to enable this network device.\n"); |
|
728 printk(KERN_ERR "Please inspect the EEPROM dump and report the issue " |
|
729 "to your hardware vendor\n"); |
|
730 printk(KERN_ERR "or Intel Customer Support.\n"); |
|
731 printk(KERN_ERR "/*********************/\n"); |
|
732 |
|
733 kfree(data); |
|
734 } |
|
735 |
|
736 /** |
|
737 * e1000_is_need_ioport - determine if an adapter needs ioport resources or not |
|
738 * @pdev: PCI device information struct |
|
739 * |
|
740 * Return true if an adapter needs ioport resources |
|
741 **/ |
|
742 static int e1000_is_need_ioport(struct pci_dev *pdev) |
|
743 { |
|
744 switch (pdev->device) { |
|
745 case E1000_DEV_ID_82540EM: |
|
746 case E1000_DEV_ID_82540EM_LOM: |
|
747 case E1000_DEV_ID_82540EP: |
|
748 case E1000_DEV_ID_82540EP_LOM: |
|
749 case E1000_DEV_ID_82540EP_LP: |
|
750 case E1000_DEV_ID_82541EI: |
|
751 case E1000_DEV_ID_82541EI_MOBILE: |
|
752 case E1000_DEV_ID_82541ER: |
|
753 case E1000_DEV_ID_82541ER_LOM: |
|
754 case E1000_DEV_ID_82541GI: |
|
755 case E1000_DEV_ID_82541GI_LF: |
|
756 case E1000_DEV_ID_82541GI_MOBILE: |
|
757 case E1000_DEV_ID_82544EI_COPPER: |
|
758 case E1000_DEV_ID_82544EI_FIBER: |
|
759 case E1000_DEV_ID_82544GC_COPPER: |
|
760 case E1000_DEV_ID_82544GC_LOM: |
|
761 case E1000_DEV_ID_82545EM_COPPER: |
|
762 case E1000_DEV_ID_82545EM_FIBER: |
|
763 case E1000_DEV_ID_82546EB_COPPER: |
|
764 case E1000_DEV_ID_82546EB_FIBER: |
|
765 case E1000_DEV_ID_82546EB_QUAD_COPPER: |
|
766 return true; |
|
767 default: |
|
768 return false; |
|
769 } |
|
770 } |
|
771 |
|
772 static const struct net_device_ops e1000_netdev_ops = { |
|
773 .ndo_open = e1000_open, |
|
774 .ndo_stop = e1000_close, |
|
775 .ndo_start_xmit = e1000_xmit_frame, |
|
776 .ndo_get_stats = e1000_get_stats, |
|
777 .ndo_set_rx_mode = e1000_set_rx_mode, |
|
778 .ndo_set_mac_address = e1000_set_mac, |
|
779 .ndo_tx_timeout = e1000_tx_timeout, |
|
780 .ndo_change_mtu = e1000_change_mtu, |
|
781 .ndo_do_ioctl = e1000_ioctl, |
|
782 .ndo_validate_addr = eth_validate_addr, |
|
783 |
|
784 .ndo_vlan_rx_register = e1000_vlan_rx_register, |
|
785 .ndo_vlan_rx_add_vid = e1000_vlan_rx_add_vid, |
|
786 .ndo_vlan_rx_kill_vid = e1000_vlan_rx_kill_vid, |
|
787 #ifdef CONFIG_NET_POLL_CONTROLLER |
|
788 .ndo_poll_controller = e1000_netpoll, |
|
789 #endif |
|
790 }; |
|
791 |
|
792 /** |
|
793 * e1000_probe - Device Initialization Routine |
|
794 * @pdev: PCI device information struct |
|
795 * @ent: entry in e1000_pci_tbl |
|
796 * |
|
797 * Returns 0 on success, negative on failure |
|
798 * |
|
799 * e1000_probe initializes an adapter identified by a pci_dev structure. |
|
800 * The OS initialization, configuring of the adapter private structure, |
|
801 * and a hardware reset occur. |
|
802 **/ |
|
803 static int __devinit e1000_probe(struct pci_dev *pdev, |
|
804 const struct pci_device_id *ent) |
|
805 { |
|
806 struct net_device *netdev; |
|
807 struct e1000_adapter *adapter; |
|
808 struct e1000_hw *hw; |
|
809 |
|
810 static int cards_found = 0; |
|
811 static int global_quad_port_a = 0; /* global ksp3 port a indication */ |
|
812 int i, err, pci_using_dac; |
|
813 u16 eeprom_data = 0; |
|
814 u16 eeprom_apme_mask = E1000_EEPROM_APME; |
|
815 int bars, need_ioport; |
|
816 |
|
817 /* do not allocate ioport bars when not needed */ |
|
818 need_ioport = e1000_is_need_ioport(pdev); |
|
819 if (need_ioport) { |
|
820 bars = pci_select_bars(pdev, IORESOURCE_MEM | IORESOURCE_IO); |
|
821 err = pci_enable_device(pdev); |
|
822 } else { |
|
823 bars = pci_select_bars(pdev, IORESOURCE_MEM); |
|
824 err = pci_enable_device_mem(pdev); |
|
825 } |
|
826 if (err) |
|
827 return err; |
|
828 |
|
829 if (!pci_set_dma_mask(pdev, DMA_BIT_MASK(64)) && |
|
830 !pci_set_consistent_dma_mask(pdev, DMA_BIT_MASK(64))) { |
|
831 pci_using_dac = 1; |
|
832 } else { |
|
833 err = pci_set_dma_mask(pdev, DMA_BIT_MASK(32)); |
|
834 if (err) { |
|
835 err = pci_set_consistent_dma_mask(pdev, DMA_BIT_MASK(32)); |
|
836 if (err) { |
|
837 E1000_ERR("No usable DMA configuration, " |
|
838 "aborting\n"); |
|
839 goto err_dma; |
|
840 } |
|
841 } |
|
842 pci_using_dac = 0; |
|
843 } |
|
844 |
|
845 err = pci_request_selected_regions(pdev, bars, e1000_driver_name); |
|
846 if (err) |
|
847 goto err_pci_reg; |
|
848 |
|
849 pci_set_master(pdev); |
|
850 |
|
851 err = -ENOMEM; |
|
852 netdev = alloc_etherdev(sizeof(struct e1000_adapter)); |
|
853 if (!netdev) |
|
854 goto err_alloc_etherdev; |
|
855 |
|
856 SET_NETDEV_DEV(netdev, &pdev->dev); |
|
857 |
|
858 pci_set_drvdata(pdev, netdev); |
|
859 adapter = netdev_priv(netdev); |
|
860 adapter->netdev = netdev; |
|
861 adapter->pdev = pdev; |
|
862 adapter->msg_enable = (1 << debug) - 1; |
|
863 adapter->bars = bars; |
|
864 adapter->need_ioport = need_ioport; |
|
865 |
|
866 hw = &adapter->hw; |
|
867 hw->back = adapter; |
|
868 |
|
869 err = -EIO; |
|
870 hw->hw_addr = pci_ioremap_bar(pdev, BAR_0); |
|
871 if (!hw->hw_addr) |
|
872 goto err_ioremap; |
|
873 |
|
874 if (adapter->need_ioport) { |
|
875 for (i = BAR_1; i <= BAR_5; i++) { |
|
876 if (pci_resource_len(pdev, i) == 0) |
|
877 continue; |
|
878 if (pci_resource_flags(pdev, i) & IORESOURCE_IO) { |
|
879 hw->io_base = pci_resource_start(pdev, i); |
|
880 break; |
|
881 } |
|
882 } |
|
883 } |
|
884 |
|
885 netdev->netdev_ops = &e1000_netdev_ops; |
|
886 e1000_set_ethtool_ops(netdev); |
|
887 netdev->watchdog_timeo = 5 * HZ; |
|
888 netif_napi_add(netdev, &adapter->napi, e1000_clean, 64); |
|
889 |
|
890 strncpy(netdev->name, pci_name(pdev), sizeof(netdev->name) - 1); |
|
891 |
|
892 adapter->bd_number = cards_found; |
|
893 |
|
894 /* setup the private structure */ |
|
895 |
|
896 err = e1000_sw_init(adapter); |
|
897 if (err) |
|
898 goto err_sw_init; |
|
899 |
|
900 err = -EIO; |
|
901 |
|
902 if (hw->mac_type >= e1000_82543) { |
|
903 netdev->features = NETIF_F_SG | |
|
904 NETIF_F_HW_CSUM | |
|
905 NETIF_F_HW_VLAN_TX | |
|
906 NETIF_F_HW_VLAN_RX | |
|
907 NETIF_F_HW_VLAN_FILTER; |
|
908 } |
|
909 |
|
910 if ((hw->mac_type >= e1000_82544) && |
|
911 (hw->mac_type != e1000_82547)) |
|
912 netdev->features |= NETIF_F_TSO; |
|
913 |
|
914 if (pci_using_dac) |
|
915 netdev->features |= NETIF_F_HIGHDMA; |
|
916 |
|
917 netdev->vlan_features |= NETIF_F_TSO; |
|
918 netdev->vlan_features |= NETIF_F_HW_CSUM; |
|
919 netdev->vlan_features |= NETIF_F_SG; |
|
920 |
|
921 adapter->en_mng_pt = e1000_enable_mng_pass_thru(hw); |
|
922 |
|
923 /* initialize eeprom parameters */ |
|
924 if (e1000_init_eeprom_params(hw)) { |
|
925 E1000_ERR("EEPROM initialization failed\n"); |
|
926 goto err_eeprom; |
|
927 } |
|
928 |
|
929 /* before reading the EEPROM, reset the controller to |
|
930 * put the device in a known good starting state */ |
|
931 |
|
932 e1000_reset_hw(hw); |
|
933 |
|
934 /* make sure the EEPROM is good */ |
|
935 if (e1000_validate_eeprom_checksum(hw) < 0) { |
|
936 DPRINTK(PROBE, ERR, "The EEPROM Checksum Is Not Valid\n"); |
|
937 e1000_dump_eeprom(adapter); |
|
938 /* |
|
939 * set MAC address to all zeroes to invalidate and temporary |
|
940 * disable this device for the user. This blocks regular |
|
941 * traffic while still permitting ethtool ioctls from reaching |
|
942 * the hardware as well as allowing the user to run the |
|
943 * interface after manually setting a hw addr using |
|
944 * `ip set address` |
|
945 */ |
|
946 memset(hw->mac_addr, 0, netdev->addr_len); |
|
947 } else { |
|
948 /* copy the MAC address out of the EEPROM */ |
|
949 if (e1000_read_mac_addr(hw)) |
|
950 DPRINTK(PROBE, ERR, "EEPROM Read Error\n"); |
|
951 } |
|
952 /* don't block initalization here due to bad MAC address */ |
|
953 memcpy(netdev->dev_addr, hw->mac_addr, netdev->addr_len); |
|
954 memcpy(netdev->perm_addr, hw->mac_addr, netdev->addr_len); |
|
955 |
|
956 if (!is_valid_ether_addr(netdev->perm_addr)) |
|
957 DPRINTK(PROBE, ERR, "Invalid MAC Address\n"); |
|
958 |
|
959 e1000_get_bus_info(hw); |
|
960 |
|
961 init_timer(&adapter->tx_fifo_stall_timer); |
|
962 adapter->tx_fifo_stall_timer.function = &e1000_82547_tx_fifo_stall; |
|
963 adapter->tx_fifo_stall_timer.data = (unsigned long)adapter; |
|
964 |
|
965 init_timer(&adapter->watchdog_timer); |
|
966 adapter->watchdog_timer.function = &e1000_watchdog; |
|
967 adapter->watchdog_timer.data = (unsigned long) adapter; |
|
968 |
|
969 init_timer(&adapter->phy_info_timer); |
|
970 adapter->phy_info_timer.function = &e1000_update_phy_info; |
|
971 adapter->phy_info_timer.data = (unsigned long)adapter; |
|
972 |
|
973 INIT_WORK(&adapter->reset_task, e1000_reset_task); |
|
974 |
|
975 e1000_check_options(adapter); |
|
976 |
|
977 /* Initial Wake on LAN setting |
|
978 * If APM wake is enabled in the EEPROM, |
|
979 * enable the ACPI Magic Packet filter |
|
980 */ |
|
981 |
|
982 switch (hw->mac_type) { |
|
983 case e1000_82542_rev2_0: |
|
984 case e1000_82542_rev2_1: |
|
985 case e1000_82543: |
|
986 break; |
|
987 case e1000_82544: |
|
988 e1000_read_eeprom(hw, |
|
989 EEPROM_INIT_CONTROL2_REG, 1, &eeprom_data); |
|
990 eeprom_apme_mask = E1000_EEPROM_82544_APM; |
|
991 break; |
|
992 case e1000_82546: |
|
993 case e1000_82546_rev_3: |
|
994 if (er32(STATUS) & E1000_STATUS_FUNC_1){ |
|
995 e1000_read_eeprom(hw, |
|
996 EEPROM_INIT_CONTROL3_PORT_B, 1, &eeprom_data); |
|
997 break; |
|
998 } |
|
999 /* Fall Through */ |
|
1000 default: |
|
1001 e1000_read_eeprom(hw, |
|
1002 EEPROM_INIT_CONTROL3_PORT_A, 1, &eeprom_data); |
|
1003 break; |
|
1004 } |
|
1005 if (eeprom_data & eeprom_apme_mask) |
|
1006 adapter->eeprom_wol |= E1000_WUFC_MAG; |
|
1007 |
|
1008 /* now that we have the eeprom settings, apply the special cases |
|
1009 * where the eeprom may be wrong or the board simply won't support |
|
1010 * wake on lan on a particular port */ |
|
1011 switch (pdev->device) { |
|
1012 case E1000_DEV_ID_82546GB_PCIE: |
|
1013 adapter->eeprom_wol = 0; |
|
1014 break; |
|
1015 case E1000_DEV_ID_82546EB_FIBER: |
|
1016 case E1000_DEV_ID_82546GB_FIBER: |
|
1017 /* Wake events only supported on port A for dual fiber |
|
1018 * regardless of eeprom setting */ |
|
1019 if (er32(STATUS) & E1000_STATUS_FUNC_1) |
|
1020 adapter->eeprom_wol = 0; |
|
1021 break; |
|
1022 case E1000_DEV_ID_82546GB_QUAD_COPPER_KSP3: |
|
1023 /* if quad port adapter, disable WoL on all but port A */ |
|
1024 if (global_quad_port_a != 0) |
|
1025 adapter->eeprom_wol = 0; |
|
1026 else |
|
1027 adapter->quad_port_a = 1; |
|
1028 /* Reset for multiple quad port adapters */ |
|
1029 if (++global_quad_port_a == 4) |
|
1030 global_quad_port_a = 0; |
|
1031 break; |
|
1032 } |
|
1033 |
|
1034 /* initialize the wol settings based on the eeprom settings */ |
|
1035 adapter->wol = adapter->eeprom_wol; |
|
1036 device_set_wakeup_enable(&adapter->pdev->dev, adapter->wol); |
|
1037 |
|
1038 /* print bus type/speed/width info */ |
|
1039 DPRINTK(PROBE, INFO, "(PCI%s:%s:%s) ", |
|
1040 ((hw->bus_type == e1000_bus_type_pcix) ? "-X" : ""), |
|
1041 ((hw->bus_speed == e1000_bus_speed_133) ? "133MHz" : |
|
1042 (hw->bus_speed == e1000_bus_speed_120) ? "120MHz" : |
|
1043 (hw->bus_speed == e1000_bus_speed_100) ? "100MHz" : |
|
1044 (hw->bus_speed == e1000_bus_speed_66) ? "66MHz" : "33MHz"), |
|
1045 ((hw->bus_width == e1000_bus_width_64) ? "64-bit" : "32-bit")); |
|
1046 |
|
1047 printk("%pM\n", netdev->dev_addr); |
|
1048 |
|
1049 /* reset the hardware with the new settings */ |
|
1050 e1000_reset(adapter); |
|
1051 |
|
1052 strcpy(netdev->name, "eth%d"); |
|
1053 err = register_netdev(netdev); |
|
1054 if (err) |
|
1055 goto err_register; |
|
1056 |
|
1057 /* carrier off reporting is important to ethtool even BEFORE open */ |
|
1058 netif_carrier_off(netdev); |
|
1059 |
|
1060 DPRINTK(PROBE, INFO, "Intel(R) PRO/1000 Network Connection\n"); |
|
1061 |
|
1062 cards_found++; |
|
1063 return 0; |
|
1064 |
|
1065 err_register: |
|
1066 err_eeprom: |
|
1067 e1000_phy_hw_reset(hw); |
|
1068 |
|
1069 if (hw->flash_address) |
|
1070 iounmap(hw->flash_address); |
|
1071 kfree(adapter->tx_ring); |
|
1072 kfree(adapter->rx_ring); |
|
1073 err_sw_init: |
|
1074 iounmap(hw->hw_addr); |
|
1075 err_ioremap: |
|
1076 free_netdev(netdev); |
|
1077 err_alloc_etherdev: |
|
1078 pci_release_selected_regions(pdev, bars); |
|
1079 err_pci_reg: |
|
1080 err_dma: |
|
1081 pci_disable_device(pdev); |
|
1082 return err; |
|
1083 } |
|
1084 |
|
1085 /** |
|
1086 * e1000_remove - Device Removal Routine |
|
1087 * @pdev: PCI device information struct |
|
1088 * |
|
1089 * e1000_remove is called by the PCI subsystem to alert the driver |
|
1090 * that it should release a PCI device. The could be caused by a |
|
1091 * Hot-Plug event, or because the driver is going to be removed from |
|
1092 * memory. |
|
1093 **/ |
|
1094 |
|
1095 static void __devexit e1000_remove(struct pci_dev *pdev) |
|
1096 { |
|
1097 struct net_device *netdev = pci_get_drvdata(pdev); |
|
1098 struct e1000_adapter *adapter = netdev_priv(netdev); |
|
1099 struct e1000_hw *hw = &adapter->hw; |
|
1100 |
|
1101 set_bit(__E1000_DOWN, &adapter->flags); |
|
1102 del_timer_sync(&adapter->tx_fifo_stall_timer); |
|
1103 del_timer_sync(&adapter->watchdog_timer); |
|
1104 del_timer_sync(&adapter->phy_info_timer); |
|
1105 |
|
1106 cancel_work_sync(&adapter->reset_task); |
|
1107 |
|
1108 e1000_release_manageability(adapter); |
|
1109 |
|
1110 unregister_netdev(netdev); |
|
1111 |
|
1112 e1000_phy_hw_reset(hw); |
|
1113 |
|
1114 kfree(adapter->tx_ring); |
|
1115 kfree(adapter->rx_ring); |
|
1116 |
|
1117 iounmap(hw->hw_addr); |
|
1118 if (hw->flash_address) |
|
1119 iounmap(hw->flash_address); |
|
1120 pci_release_selected_regions(pdev, adapter->bars); |
|
1121 |
|
1122 free_netdev(netdev); |
|
1123 |
|
1124 pci_disable_device(pdev); |
|
1125 } |
|
1126 |
|
1127 /** |
|
1128 * e1000_sw_init - Initialize general software structures (struct e1000_adapter) |
|
1129 * @adapter: board private structure to initialize |
|
1130 * |
|
1131 * e1000_sw_init initializes the Adapter private data structure. |
|
1132 * Fields are initialized based on PCI device information and |
|
1133 * OS network device settings (MTU size). |
|
1134 **/ |
|
1135 |
|
1136 static int __devinit e1000_sw_init(struct e1000_adapter *adapter) |
|
1137 { |
|
1138 struct e1000_hw *hw = &adapter->hw; |
|
1139 struct net_device *netdev = adapter->netdev; |
|
1140 struct pci_dev *pdev = adapter->pdev; |
|
1141 |
|
1142 /* PCI config space info */ |
|
1143 |
|
1144 hw->vendor_id = pdev->vendor; |
|
1145 hw->device_id = pdev->device; |
|
1146 hw->subsystem_vendor_id = pdev->subsystem_vendor; |
|
1147 hw->subsystem_id = pdev->subsystem_device; |
|
1148 hw->revision_id = pdev->revision; |
|
1149 |
|
1150 pci_read_config_word(pdev, PCI_COMMAND, &hw->pci_cmd_word); |
|
1151 |
|
1152 adapter->rx_buffer_len = MAXIMUM_ETHERNET_VLAN_SIZE; |
|
1153 hw->max_frame_size = netdev->mtu + |
|
1154 ENET_HEADER_SIZE + ETHERNET_FCS_SIZE; |
|
1155 hw->min_frame_size = MINIMUM_ETHERNET_FRAME_SIZE; |
|
1156 |
|
1157 /* identify the MAC */ |
|
1158 |
|
1159 if (e1000_set_mac_type(hw)) { |
|
1160 DPRINTK(PROBE, ERR, "Unknown MAC Type\n"); |
|
1161 return -EIO; |
|
1162 } |
|
1163 |
|
1164 switch (hw->mac_type) { |
|
1165 default: |
|
1166 break; |
|
1167 case e1000_82541: |
|
1168 case e1000_82547: |
|
1169 case e1000_82541_rev_2: |
|
1170 case e1000_82547_rev_2: |
|
1171 hw->phy_init_script = 1; |
|
1172 break; |
|
1173 } |
|
1174 |
|
1175 e1000_set_media_type(hw); |
|
1176 |
|
1177 hw->wait_autoneg_complete = false; |
|
1178 hw->tbi_compatibility_en = true; |
|
1179 hw->adaptive_ifs = true; |
|
1180 |
|
1181 /* Copper options */ |
|
1182 |
|
1183 if (hw->media_type == e1000_media_type_copper) { |
|
1184 hw->mdix = AUTO_ALL_MODES; |
|
1185 hw->disable_polarity_correction = false; |
|
1186 hw->master_slave = E1000_MASTER_SLAVE; |
|
1187 } |
|
1188 |
|
1189 adapter->num_tx_queues = 1; |
|
1190 adapter->num_rx_queues = 1; |
|
1191 |
|
1192 if (e1000_alloc_queues(adapter)) { |
|
1193 DPRINTK(PROBE, ERR, "Unable to allocate memory for queues\n"); |
|
1194 return -ENOMEM; |
|
1195 } |
|
1196 |
|
1197 /* Explicitly disable IRQ since the NIC can be in any state. */ |
|
1198 e1000_irq_disable(adapter); |
|
1199 |
|
1200 spin_lock_init(&adapter->stats_lock); |
|
1201 |
|
1202 set_bit(__E1000_DOWN, &adapter->flags); |
|
1203 |
|
1204 return 0; |
|
1205 } |
|
1206 |
|
1207 /** |
|
1208 * e1000_alloc_queues - Allocate memory for all rings |
|
1209 * @adapter: board private structure to initialize |
|
1210 * |
|
1211 * We allocate one ring per queue at run-time since we don't know the |
|
1212 * number of queues at compile-time. |
|
1213 **/ |
|
1214 |
|
1215 static int __devinit e1000_alloc_queues(struct e1000_adapter *adapter) |
|
1216 { |
|
1217 adapter->tx_ring = kcalloc(adapter->num_tx_queues, |
|
1218 sizeof(struct e1000_tx_ring), GFP_KERNEL); |
|
1219 if (!adapter->tx_ring) |
|
1220 return -ENOMEM; |
|
1221 |
|
1222 adapter->rx_ring = kcalloc(adapter->num_rx_queues, |
|
1223 sizeof(struct e1000_rx_ring), GFP_KERNEL); |
|
1224 if (!adapter->rx_ring) { |
|
1225 kfree(adapter->tx_ring); |
|
1226 return -ENOMEM; |
|
1227 } |
|
1228 |
|
1229 return E1000_SUCCESS; |
|
1230 } |
|
1231 |
|
1232 /** |
|
1233 * e1000_open - Called when a network interface is made active |
|
1234 * @netdev: network interface device structure |
|
1235 * |
|
1236 * Returns 0 on success, negative value on failure |
|
1237 * |
|
1238 * The open entry point is called when a network interface is made |
|
1239 * active by the system (IFF_UP). At this point all resources needed |
|
1240 * for transmit and receive operations are allocated, the interrupt |
|
1241 * handler is registered with the OS, the watchdog timer is started, |
|
1242 * and the stack is notified that the interface is ready. |
|
1243 **/ |
|
1244 |
|
1245 static int e1000_open(struct net_device *netdev) |
|
1246 { |
|
1247 struct e1000_adapter *adapter = netdev_priv(netdev); |
|
1248 struct e1000_hw *hw = &adapter->hw; |
|
1249 int err; |
|
1250 |
|
1251 /* disallow open during test */ |
|
1252 if (test_bit(__E1000_TESTING, &adapter->flags)) |
|
1253 return -EBUSY; |
|
1254 |
|
1255 netif_carrier_off(netdev); |
|
1256 |
|
1257 /* allocate transmit descriptors */ |
|
1258 err = e1000_setup_all_tx_resources(adapter); |
|
1259 if (err) |
|
1260 goto err_setup_tx; |
|
1261 |
|
1262 /* allocate receive descriptors */ |
|
1263 err = e1000_setup_all_rx_resources(adapter); |
|
1264 if (err) |
|
1265 goto err_setup_rx; |
|
1266 |
|
1267 e1000_power_up_phy(adapter); |
|
1268 |
|
1269 adapter->mng_vlan_id = E1000_MNG_VLAN_NONE; |
|
1270 if ((hw->mng_cookie.status & |
|
1271 E1000_MNG_DHCP_COOKIE_STATUS_VLAN_SUPPORT)) { |
|
1272 e1000_update_mng_vlan(adapter); |
|
1273 } |
|
1274 |
|
1275 /* before we allocate an interrupt, we must be ready to handle it. |
|
1276 * Setting DEBUG_SHIRQ in the kernel makes it fire an interrupt |
|
1277 * as soon as we call pci_request_irq, so we have to setup our |
|
1278 * clean_rx handler before we do so. */ |
|
1279 e1000_configure(adapter); |
|
1280 |
|
1281 err = e1000_request_irq(adapter); |
|
1282 if (err) |
|
1283 goto err_req_irq; |
|
1284 |
|
1285 /* From here on the code is the same as e1000_up() */ |
|
1286 clear_bit(__E1000_DOWN, &adapter->flags); |
|
1287 |
|
1288 napi_enable(&adapter->napi); |
|
1289 |
|
1290 e1000_irq_enable(adapter); |
|
1291 |
|
1292 netif_start_queue(netdev); |
|
1293 |
|
1294 /* fire a link status change interrupt to start the watchdog */ |
|
1295 ew32(ICS, E1000_ICS_LSC); |
|
1296 |
|
1297 return E1000_SUCCESS; |
|
1298 |
|
1299 err_req_irq: |
|
1300 e1000_power_down_phy(adapter); |
|
1301 e1000_free_all_rx_resources(adapter); |
|
1302 err_setup_rx: |
|
1303 e1000_free_all_tx_resources(adapter); |
|
1304 err_setup_tx: |
|
1305 e1000_reset(adapter); |
|
1306 |
|
1307 return err; |
|
1308 } |
|
1309 |
|
1310 /** |
|
1311 * e1000_close - Disables a network interface |
|
1312 * @netdev: network interface device structure |
|
1313 * |
|
1314 * Returns 0, this is not allowed to fail |
|
1315 * |
|
1316 * The close entry point is called when an interface is de-activated |
|
1317 * by the OS. The hardware is still under the drivers control, but |
|
1318 * needs to be disabled. A global MAC reset is issued to stop the |
|
1319 * hardware, and all transmit and receive resources are freed. |
|
1320 **/ |
|
1321 |
|
1322 static int e1000_close(struct net_device *netdev) |
|
1323 { |
|
1324 struct e1000_adapter *adapter = netdev_priv(netdev); |
|
1325 struct e1000_hw *hw = &adapter->hw; |
|
1326 |
|
1327 WARN_ON(test_bit(__E1000_RESETTING, &adapter->flags)); |
|
1328 e1000_down(adapter); |
|
1329 e1000_power_down_phy(adapter); |
|
1330 e1000_free_irq(adapter); |
|
1331 |
|
1332 e1000_free_all_tx_resources(adapter); |
|
1333 e1000_free_all_rx_resources(adapter); |
|
1334 |
|
1335 /* kill manageability vlan ID if supported, but not if a vlan with |
|
1336 * the same ID is registered on the host OS (let 8021q kill it) */ |
|
1337 if ((hw->mng_cookie.status & |
|
1338 E1000_MNG_DHCP_COOKIE_STATUS_VLAN_SUPPORT) && |
|
1339 !(adapter->vlgrp && |
|
1340 vlan_group_get_device(adapter->vlgrp, adapter->mng_vlan_id))) { |
|
1341 e1000_vlan_rx_kill_vid(netdev, adapter->mng_vlan_id); |
|
1342 } |
|
1343 |
|
1344 return 0; |
|
1345 } |
|
1346 |
|
1347 /** |
|
1348 * e1000_check_64k_bound - check that memory doesn't cross 64kB boundary |
|
1349 * @adapter: address of board private structure |
|
1350 * @start: address of beginning of memory |
|
1351 * @len: length of memory |
|
1352 **/ |
|
1353 static bool e1000_check_64k_bound(struct e1000_adapter *adapter, void *start, |
|
1354 unsigned long len) |
|
1355 { |
|
1356 struct e1000_hw *hw = &adapter->hw; |
|
1357 unsigned long begin = (unsigned long)start; |
|
1358 unsigned long end = begin + len; |
|
1359 |
|
1360 /* First rev 82545 and 82546 need to not allow any memory |
|
1361 * write location to cross 64k boundary due to errata 23 */ |
|
1362 if (hw->mac_type == e1000_82545 || |
|
1363 hw->mac_type == e1000_82546) { |
|
1364 return ((begin ^ (end - 1)) >> 16) != 0 ? false : true; |
|
1365 } |
|
1366 |
|
1367 return true; |
|
1368 } |
|
1369 |
|
1370 /** |
|
1371 * e1000_setup_tx_resources - allocate Tx resources (Descriptors) |
|
1372 * @adapter: board private structure |
|
1373 * @txdr: tx descriptor ring (for a specific queue) to setup |
|
1374 * |
|
1375 * Return 0 on success, negative on failure |
|
1376 **/ |
|
1377 |
|
1378 static int e1000_setup_tx_resources(struct e1000_adapter *adapter, |
|
1379 struct e1000_tx_ring *txdr) |
|
1380 { |
|
1381 struct pci_dev *pdev = adapter->pdev; |
|
1382 int size; |
|
1383 |
|
1384 size = sizeof(struct e1000_buffer) * txdr->count; |
|
1385 txdr->buffer_info = vmalloc(size); |
|
1386 if (!txdr->buffer_info) { |
|
1387 DPRINTK(PROBE, ERR, |
|
1388 "Unable to allocate memory for the transmit descriptor ring\n"); |
|
1389 return -ENOMEM; |
|
1390 } |
|
1391 memset(txdr->buffer_info, 0, size); |
|
1392 |
|
1393 /* round up to nearest 4K */ |
|
1394 |
|
1395 txdr->size = txdr->count * sizeof(struct e1000_tx_desc); |
|
1396 txdr->size = ALIGN(txdr->size, 4096); |
|
1397 |
|
1398 txdr->desc = pci_alloc_consistent(pdev, txdr->size, &txdr->dma); |
|
1399 if (!txdr->desc) { |
|
1400 setup_tx_desc_die: |
|
1401 vfree(txdr->buffer_info); |
|
1402 DPRINTK(PROBE, ERR, |
|
1403 "Unable to allocate memory for the transmit descriptor ring\n"); |
|
1404 return -ENOMEM; |
|
1405 } |
|
1406 |
|
1407 /* Fix for errata 23, can't cross 64kB boundary */ |
|
1408 if (!e1000_check_64k_bound(adapter, txdr->desc, txdr->size)) { |
|
1409 void *olddesc = txdr->desc; |
|
1410 dma_addr_t olddma = txdr->dma; |
|
1411 DPRINTK(TX_ERR, ERR, "txdr align check failed: %u bytes " |
|
1412 "at %p\n", txdr->size, txdr->desc); |
|
1413 /* Try again, without freeing the previous */ |
|
1414 txdr->desc = pci_alloc_consistent(pdev, txdr->size, &txdr->dma); |
|
1415 /* Failed allocation, critical failure */ |
|
1416 if (!txdr->desc) { |
|
1417 pci_free_consistent(pdev, txdr->size, olddesc, olddma); |
|
1418 goto setup_tx_desc_die; |
|
1419 } |
|
1420 |
|
1421 if (!e1000_check_64k_bound(adapter, txdr->desc, txdr->size)) { |
|
1422 /* give up */ |
|
1423 pci_free_consistent(pdev, txdr->size, txdr->desc, |
|
1424 txdr->dma); |
|
1425 pci_free_consistent(pdev, txdr->size, olddesc, olddma); |
|
1426 DPRINTK(PROBE, ERR, |
|
1427 "Unable to allocate aligned memory " |
|
1428 "for the transmit descriptor ring\n"); |
|
1429 vfree(txdr->buffer_info); |
|
1430 return -ENOMEM; |
|
1431 } else { |
|
1432 /* Free old allocation, new allocation was successful */ |
|
1433 pci_free_consistent(pdev, txdr->size, olddesc, olddma); |
|
1434 } |
|
1435 } |
|
1436 memset(txdr->desc, 0, txdr->size); |
|
1437 |
|
1438 txdr->next_to_use = 0; |
|
1439 txdr->next_to_clean = 0; |
|
1440 |
|
1441 return 0; |
|
1442 } |
|
1443 |
|
1444 /** |
|
1445 * e1000_setup_all_tx_resources - wrapper to allocate Tx resources |
|
1446 * (Descriptors) for all queues |
|
1447 * @adapter: board private structure |
|
1448 * |
|
1449 * Return 0 on success, negative on failure |
|
1450 **/ |
|
1451 |
|
1452 int e1000_setup_all_tx_resources(struct e1000_adapter *adapter) |
|
1453 { |
|
1454 int i, err = 0; |
|
1455 |
|
1456 for (i = 0; i < adapter->num_tx_queues; i++) { |
|
1457 err = e1000_setup_tx_resources(adapter, &adapter->tx_ring[i]); |
|
1458 if (err) { |
|
1459 DPRINTK(PROBE, ERR, |
|
1460 "Allocation for Tx Queue %u failed\n", i); |
|
1461 for (i-- ; i >= 0; i--) |
|
1462 e1000_free_tx_resources(adapter, |
|
1463 &adapter->tx_ring[i]); |
|
1464 break; |
|
1465 } |
|
1466 } |
|
1467 |
|
1468 return err; |
|
1469 } |
|
1470 |
|
1471 /** |
|
1472 * e1000_configure_tx - Configure 8254x Transmit Unit after Reset |
|
1473 * @adapter: board private structure |
|
1474 * |
|
1475 * Configure the Tx unit of the MAC after a reset. |
|
1476 **/ |
|
1477 |
|
1478 static void e1000_configure_tx(struct e1000_adapter *adapter) |
|
1479 { |
|
1480 u64 tdba; |
|
1481 struct e1000_hw *hw = &adapter->hw; |
|
1482 u32 tdlen, tctl, tipg; |
|
1483 u32 ipgr1, ipgr2; |
|
1484 |
|
1485 /* Setup the HW Tx Head and Tail descriptor pointers */ |
|
1486 |
|
1487 switch (adapter->num_tx_queues) { |
|
1488 case 1: |
|
1489 default: |
|
1490 tdba = adapter->tx_ring[0].dma; |
|
1491 tdlen = adapter->tx_ring[0].count * |
|
1492 sizeof(struct e1000_tx_desc); |
|
1493 ew32(TDLEN, tdlen); |
|
1494 ew32(TDBAH, (tdba >> 32)); |
|
1495 ew32(TDBAL, (tdba & 0x00000000ffffffffULL)); |
|
1496 ew32(TDT, 0); |
|
1497 ew32(TDH, 0); |
|
1498 adapter->tx_ring[0].tdh = ((hw->mac_type >= e1000_82543) ? E1000_TDH : E1000_82542_TDH); |
|
1499 adapter->tx_ring[0].tdt = ((hw->mac_type >= e1000_82543) ? E1000_TDT : E1000_82542_TDT); |
|
1500 break; |
|
1501 } |
|
1502 |
|
1503 /* Set the default values for the Tx Inter Packet Gap timer */ |
|
1504 if ((hw->media_type == e1000_media_type_fiber || |
|
1505 hw->media_type == e1000_media_type_internal_serdes)) |
|
1506 tipg = DEFAULT_82543_TIPG_IPGT_FIBER; |
|
1507 else |
|
1508 tipg = DEFAULT_82543_TIPG_IPGT_COPPER; |
|
1509 |
|
1510 switch (hw->mac_type) { |
|
1511 case e1000_82542_rev2_0: |
|
1512 case e1000_82542_rev2_1: |
|
1513 tipg = DEFAULT_82542_TIPG_IPGT; |
|
1514 ipgr1 = DEFAULT_82542_TIPG_IPGR1; |
|
1515 ipgr2 = DEFAULT_82542_TIPG_IPGR2; |
|
1516 break; |
|
1517 default: |
|
1518 ipgr1 = DEFAULT_82543_TIPG_IPGR1; |
|
1519 ipgr2 = DEFAULT_82543_TIPG_IPGR2; |
|
1520 break; |
|
1521 } |
|
1522 tipg |= ipgr1 << E1000_TIPG_IPGR1_SHIFT; |
|
1523 tipg |= ipgr2 << E1000_TIPG_IPGR2_SHIFT; |
|
1524 ew32(TIPG, tipg); |
|
1525 |
|
1526 /* Set the Tx Interrupt Delay register */ |
|
1527 |
|
1528 ew32(TIDV, adapter->tx_int_delay); |
|
1529 if (hw->mac_type >= e1000_82540) |
|
1530 ew32(TADV, adapter->tx_abs_int_delay); |
|
1531 |
|
1532 /* Program the Transmit Control Register */ |
|
1533 |
|
1534 tctl = er32(TCTL); |
|
1535 tctl &= ~E1000_TCTL_CT; |
|
1536 tctl |= E1000_TCTL_PSP | E1000_TCTL_RTLC | |
|
1537 (E1000_COLLISION_THRESHOLD << E1000_CT_SHIFT); |
|
1538 |
|
1539 e1000_config_collision_dist(hw); |
|
1540 |
|
1541 /* Setup Transmit Descriptor Settings for eop descriptor */ |
|
1542 adapter->txd_cmd = E1000_TXD_CMD_EOP | E1000_TXD_CMD_IFCS; |
|
1543 |
|
1544 /* only set IDE if we are delaying interrupts using the timers */ |
|
1545 if (adapter->tx_int_delay) |
|
1546 adapter->txd_cmd |= E1000_TXD_CMD_IDE; |
|
1547 |
|
1548 if (hw->mac_type < e1000_82543) |
|
1549 adapter->txd_cmd |= E1000_TXD_CMD_RPS; |
|
1550 else |
|
1551 adapter->txd_cmd |= E1000_TXD_CMD_RS; |
|
1552 |
|
1553 /* Cache if we're 82544 running in PCI-X because we'll |
|
1554 * need this to apply a workaround later in the send path. */ |
|
1555 if (hw->mac_type == e1000_82544 && |
|
1556 hw->bus_type == e1000_bus_type_pcix) |
|
1557 adapter->pcix_82544 = 1; |
|
1558 |
|
1559 ew32(TCTL, tctl); |
|
1560 |
|
1561 } |
|
1562 |
|
1563 /** |
|
1564 * e1000_setup_rx_resources - allocate Rx resources (Descriptors) |
|
1565 * @adapter: board private structure |
|
1566 * @rxdr: rx descriptor ring (for a specific queue) to setup |
|
1567 * |
|
1568 * Returns 0 on success, negative on failure |
|
1569 **/ |
|
1570 |
|
1571 static int e1000_setup_rx_resources(struct e1000_adapter *adapter, |
|
1572 struct e1000_rx_ring *rxdr) |
|
1573 { |
|
1574 struct pci_dev *pdev = adapter->pdev; |
|
1575 int size, desc_len; |
|
1576 |
|
1577 size = sizeof(struct e1000_buffer) * rxdr->count; |
|
1578 rxdr->buffer_info = vmalloc(size); |
|
1579 if (!rxdr->buffer_info) { |
|
1580 DPRINTK(PROBE, ERR, |
|
1581 "Unable to allocate memory for the receive descriptor ring\n"); |
|
1582 return -ENOMEM; |
|
1583 } |
|
1584 memset(rxdr->buffer_info, 0, size); |
|
1585 |
|
1586 desc_len = sizeof(struct e1000_rx_desc); |
|
1587 |
|
1588 /* Round up to nearest 4K */ |
|
1589 |
|
1590 rxdr->size = rxdr->count * desc_len; |
|
1591 rxdr->size = ALIGN(rxdr->size, 4096); |
|
1592 |
|
1593 rxdr->desc = pci_alloc_consistent(pdev, rxdr->size, &rxdr->dma); |
|
1594 |
|
1595 if (!rxdr->desc) { |
|
1596 DPRINTK(PROBE, ERR, |
|
1597 "Unable to allocate memory for the receive descriptor ring\n"); |
|
1598 setup_rx_desc_die: |
|
1599 vfree(rxdr->buffer_info); |
|
1600 return -ENOMEM; |
|
1601 } |
|
1602 |
|
1603 /* Fix for errata 23, can't cross 64kB boundary */ |
|
1604 if (!e1000_check_64k_bound(adapter, rxdr->desc, rxdr->size)) { |
|
1605 void *olddesc = rxdr->desc; |
|
1606 dma_addr_t olddma = rxdr->dma; |
|
1607 DPRINTK(RX_ERR, ERR, "rxdr align check failed: %u bytes " |
|
1608 "at %p\n", rxdr->size, rxdr->desc); |
|
1609 /* Try again, without freeing the previous */ |
|
1610 rxdr->desc = pci_alloc_consistent(pdev, rxdr->size, &rxdr->dma); |
|
1611 /* Failed allocation, critical failure */ |
|
1612 if (!rxdr->desc) { |
|
1613 pci_free_consistent(pdev, rxdr->size, olddesc, olddma); |
|
1614 DPRINTK(PROBE, ERR, |
|
1615 "Unable to allocate memory " |
|
1616 "for the receive descriptor ring\n"); |
|
1617 goto setup_rx_desc_die; |
|
1618 } |
|
1619 |
|
1620 if (!e1000_check_64k_bound(adapter, rxdr->desc, rxdr->size)) { |
|
1621 /* give up */ |
|
1622 pci_free_consistent(pdev, rxdr->size, rxdr->desc, |
|
1623 rxdr->dma); |
|
1624 pci_free_consistent(pdev, rxdr->size, olddesc, olddma); |
|
1625 DPRINTK(PROBE, ERR, |
|
1626 "Unable to allocate aligned memory " |
|
1627 "for the receive descriptor ring\n"); |
|
1628 goto setup_rx_desc_die; |
|
1629 } else { |
|
1630 /* Free old allocation, new allocation was successful */ |
|
1631 pci_free_consistent(pdev, rxdr->size, olddesc, olddma); |
|
1632 } |
|
1633 } |
|
1634 memset(rxdr->desc, 0, rxdr->size); |
|
1635 |
|
1636 rxdr->next_to_clean = 0; |
|
1637 rxdr->next_to_use = 0; |
|
1638 rxdr->rx_skb_top = NULL; |
|
1639 |
|
1640 return 0; |
|
1641 } |
|
1642 |
|
1643 /** |
|
1644 * e1000_setup_all_rx_resources - wrapper to allocate Rx resources |
|
1645 * (Descriptors) for all queues |
|
1646 * @adapter: board private structure |
|
1647 * |
|
1648 * Return 0 on success, negative on failure |
|
1649 **/ |
|
1650 |
|
1651 int e1000_setup_all_rx_resources(struct e1000_adapter *adapter) |
|
1652 { |
|
1653 int i, err = 0; |
|
1654 |
|
1655 for (i = 0; i < adapter->num_rx_queues; i++) { |
|
1656 err = e1000_setup_rx_resources(adapter, &adapter->rx_ring[i]); |
|
1657 if (err) { |
|
1658 DPRINTK(PROBE, ERR, |
|
1659 "Allocation for Rx Queue %u failed\n", i); |
|
1660 for (i-- ; i >= 0; i--) |
|
1661 e1000_free_rx_resources(adapter, |
|
1662 &adapter->rx_ring[i]); |
|
1663 break; |
|
1664 } |
|
1665 } |
|
1666 |
|
1667 return err; |
|
1668 } |
|
1669 |
|
1670 /** |
|
1671 * e1000_setup_rctl - configure the receive control registers |
|
1672 * @adapter: Board private structure |
|
1673 **/ |
|
1674 static void e1000_setup_rctl(struct e1000_adapter *adapter) |
|
1675 { |
|
1676 struct e1000_hw *hw = &adapter->hw; |
|
1677 u32 rctl; |
|
1678 |
|
1679 rctl = er32(RCTL); |
|
1680 |
|
1681 rctl &= ~(3 << E1000_RCTL_MO_SHIFT); |
|
1682 |
|
1683 rctl |= E1000_RCTL_EN | E1000_RCTL_BAM | |
|
1684 E1000_RCTL_LBM_NO | E1000_RCTL_RDMTS_HALF | |
|
1685 (hw->mc_filter_type << E1000_RCTL_MO_SHIFT); |
|
1686 |
|
1687 if (hw->tbi_compatibility_on == 1) |
|
1688 rctl |= E1000_RCTL_SBP; |
|
1689 else |
|
1690 rctl &= ~E1000_RCTL_SBP; |
|
1691 |
|
1692 if (adapter->netdev->mtu <= ETH_DATA_LEN) |
|
1693 rctl &= ~E1000_RCTL_LPE; |
|
1694 else |
|
1695 rctl |= E1000_RCTL_LPE; |
|
1696 |
|
1697 /* Setup buffer sizes */ |
|
1698 rctl &= ~E1000_RCTL_SZ_4096; |
|
1699 rctl |= E1000_RCTL_BSEX; |
|
1700 switch (adapter->rx_buffer_len) { |
|
1701 case E1000_RXBUFFER_2048: |
|
1702 default: |
|
1703 rctl |= E1000_RCTL_SZ_2048; |
|
1704 rctl &= ~E1000_RCTL_BSEX; |
|
1705 break; |
|
1706 case E1000_RXBUFFER_4096: |
|
1707 rctl |= E1000_RCTL_SZ_4096; |
|
1708 break; |
|
1709 case E1000_RXBUFFER_8192: |
|
1710 rctl |= E1000_RCTL_SZ_8192; |
|
1711 break; |
|
1712 case E1000_RXBUFFER_16384: |
|
1713 rctl |= E1000_RCTL_SZ_16384; |
|
1714 break; |
|
1715 } |
|
1716 |
|
1717 ew32(RCTL, rctl); |
|
1718 } |
|
1719 |
|
1720 /** |
|
1721 * e1000_configure_rx - Configure 8254x Receive Unit after Reset |
|
1722 * @adapter: board private structure |
|
1723 * |
|
1724 * Configure the Rx unit of the MAC after a reset. |
|
1725 **/ |
|
1726 |
|
1727 static void e1000_configure_rx(struct e1000_adapter *adapter) |
|
1728 { |
|
1729 u64 rdba; |
|
1730 struct e1000_hw *hw = &adapter->hw; |
|
1731 u32 rdlen, rctl, rxcsum; |
|
1732 |
|
1733 if (adapter->netdev->mtu > ETH_DATA_LEN) { |
|
1734 rdlen = adapter->rx_ring[0].count * |
|
1735 sizeof(struct e1000_rx_desc); |
|
1736 adapter->clean_rx = e1000_clean_jumbo_rx_irq; |
|
1737 adapter->alloc_rx_buf = e1000_alloc_jumbo_rx_buffers; |
|
1738 } else { |
|
1739 rdlen = adapter->rx_ring[0].count * |
|
1740 sizeof(struct e1000_rx_desc); |
|
1741 adapter->clean_rx = e1000_clean_rx_irq; |
|
1742 adapter->alloc_rx_buf = e1000_alloc_rx_buffers; |
|
1743 } |
|
1744 |
|
1745 /* disable receives while setting up the descriptors */ |
|
1746 rctl = er32(RCTL); |
|
1747 ew32(RCTL, rctl & ~E1000_RCTL_EN); |
|
1748 |
|
1749 /* set the Receive Delay Timer Register */ |
|
1750 ew32(RDTR, adapter->rx_int_delay); |
|
1751 |
|
1752 if (hw->mac_type >= e1000_82540) { |
|
1753 ew32(RADV, adapter->rx_abs_int_delay); |
|
1754 if (adapter->itr_setting != 0) |
|
1755 ew32(ITR, 1000000000 / (adapter->itr * 256)); |
|
1756 } |
|
1757 |
|
1758 /* Setup the HW Rx Head and Tail Descriptor Pointers and |
|
1759 * the Base and Length of the Rx Descriptor Ring */ |
|
1760 switch (adapter->num_rx_queues) { |
|
1761 case 1: |
|
1762 default: |
|
1763 rdba = adapter->rx_ring[0].dma; |
|
1764 ew32(RDLEN, rdlen); |
|
1765 ew32(RDBAH, (rdba >> 32)); |
|
1766 ew32(RDBAL, (rdba & 0x00000000ffffffffULL)); |
|
1767 ew32(RDT, 0); |
|
1768 ew32(RDH, 0); |
|
1769 adapter->rx_ring[0].rdh = ((hw->mac_type >= e1000_82543) ? E1000_RDH : E1000_82542_RDH); |
|
1770 adapter->rx_ring[0].rdt = ((hw->mac_type >= e1000_82543) ? E1000_RDT : E1000_82542_RDT); |
|
1771 break; |
|
1772 } |
|
1773 |
|
1774 /* Enable 82543 Receive Checksum Offload for TCP and UDP */ |
|
1775 if (hw->mac_type >= e1000_82543) { |
|
1776 rxcsum = er32(RXCSUM); |
|
1777 if (adapter->rx_csum) |
|
1778 rxcsum |= E1000_RXCSUM_TUOFL; |
|
1779 else |
|
1780 /* don't need to clear IPPCSE as it defaults to 0 */ |
|
1781 rxcsum &= ~E1000_RXCSUM_TUOFL; |
|
1782 ew32(RXCSUM, rxcsum); |
|
1783 } |
|
1784 |
|
1785 /* Enable Receives */ |
|
1786 ew32(RCTL, rctl); |
|
1787 } |
|
1788 |
|
1789 /** |
|
1790 * e1000_free_tx_resources - Free Tx Resources per Queue |
|
1791 * @adapter: board private structure |
|
1792 * @tx_ring: Tx descriptor ring for a specific queue |
|
1793 * |
|
1794 * Free all transmit software resources |
|
1795 **/ |
|
1796 |
|
1797 static void e1000_free_tx_resources(struct e1000_adapter *adapter, |
|
1798 struct e1000_tx_ring *tx_ring) |
|
1799 { |
|
1800 struct pci_dev *pdev = adapter->pdev; |
|
1801 |
|
1802 e1000_clean_tx_ring(adapter, tx_ring); |
|
1803 |
|
1804 vfree(tx_ring->buffer_info); |
|
1805 tx_ring->buffer_info = NULL; |
|
1806 |
|
1807 pci_free_consistent(pdev, tx_ring->size, tx_ring->desc, tx_ring->dma); |
|
1808 |
|
1809 tx_ring->desc = NULL; |
|
1810 } |
|
1811 |
|
1812 /** |
|
1813 * e1000_free_all_tx_resources - Free Tx Resources for All Queues |
|
1814 * @adapter: board private structure |
|
1815 * |
|
1816 * Free all transmit software resources |
|
1817 **/ |
|
1818 |
|
1819 void e1000_free_all_tx_resources(struct e1000_adapter *adapter) |
|
1820 { |
|
1821 int i; |
|
1822 |
|
1823 for (i = 0; i < adapter->num_tx_queues; i++) |
|
1824 e1000_free_tx_resources(adapter, &adapter->tx_ring[i]); |
|
1825 } |
|
1826 |
|
1827 static void e1000_unmap_and_free_tx_resource(struct e1000_adapter *adapter, |
|
1828 struct e1000_buffer *buffer_info) |
|
1829 { |
|
1830 if (buffer_info->dma) { |
|
1831 if (buffer_info->mapped_as_page) |
|
1832 pci_unmap_page(adapter->pdev, buffer_info->dma, |
|
1833 buffer_info->length, PCI_DMA_TODEVICE); |
|
1834 else |
|
1835 pci_unmap_single(adapter->pdev, buffer_info->dma, |
|
1836 buffer_info->length, |
|
1837 PCI_DMA_TODEVICE); |
|
1838 buffer_info->dma = 0; |
|
1839 } |
|
1840 if (buffer_info->skb) { |
|
1841 dev_kfree_skb_any(buffer_info->skb); |
|
1842 buffer_info->skb = NULL; |
|
1843 } |
|
1844 buffer_info->time_stamp = 0; |
|
1845 /* buffer_info must be completely set up in the transmit path */ |
|
1846 } |
|
1847 |
|
1848 /** |
|
1849 * e1000_clean_tx_ring - Free Tx Buffers |
|
1850 * @adapter: board private structure |
|
1851 * @tx_ring: ring to be cleaned |
|
1852 **/ |
|
1853 |
|
1854 static void e1000_clean_tx_ring(struct e1000_adapter *adapter, |
|
1855 struct e1000_tx_ring *tx_ring) |
|
1856 { |
|
1857 struct e1000_hw *hw = &adapter->hw; |
|
1858 struct e1000_buffer *buffer_info; |
|
1859 unsigned long size; |
|
1860 unsigned int i; |
|
1861 |
|
1862 /* Free all the Tx ring sk_buffs */ |
|
1863 |
|
1864 for (i = 0; i < tx_ring->count; i++) { |
|
1865 buffer_info = &tx_ring->buffer_info[i]; |
|
1866 e1000_unmap_and_free_tx_resource(adapter, buffer_info); |
|
1867 } |
|
1868 |
|
1869 size = sizeof(struct e1000_buffer) * tx_ring->count; |
|
1870 memset(tx_ring->buffer_info, 0, size); |
|
1871 |
|
1872 /* Zero out the descriptor ring */ |
|
1873 |
|
1874 memset(tx_ring->desc, 0, tx_ring->size); |
|
1875 |
|
1876 tx_ring->next_to_use = 0; |
|
1877 tx_ring->next_to_clean = 0; |
|
1878 tx_ring->last_tx_tso = 0; |
|
1879 |
|
1880 writel(0, hw->hw_addr + tx_ring->tdh); |
|
1881 writel(0, hw->hw_addr + tx_ring->tdt); |
|
1882 } |
|
1883 |
|
1884 /** |
|
1885 * e1000_clean_all_tx_rings - Free Tx Buffers for all queues |
|
1886 * @adapter: board private structure |
|
1887 **/ |
|
1888 |
|
1889 static void e1000_clean_all_tx_rings(struct e1000_adapter *adapter) |
|
1890 { |
|
1891 int i; |
|
1892 |
|
1893 for (i = 0; i < adapter->num_tx_queues; i++) |
|
1894 e1000_clean_tx_ring(adapter, &adapter->tx_ring[i]); |
|
1895 } |
|
1896 |
|
1897 /** |
|
1898 * e1000_free_rx_resources - Free Rx Resources |
|
1899 * @adapter: board private structure |
|
1900 * @rx_ring: ring to clean the resources from |
|
1901 * |
|
1902 * Free all receive software resources |
|
1903 **/ |
|
1904 |
|
1905 static void e1000_free_rx_resources(struct e1000_adapter *adapter, |
|
1906 struct e1000_rx_ring *rx_ring) |
|
1907 { |
|
1908 struct pci_dev *pdev = adapter->pdev; |
|
1909 |
|
1910 e1000_clean_rx_ring(adapter, rx_ring); |
|
1911 |
|
1912 vfree(rx_ring->buffer_info); |
|
1913 rx_ring->buffer_info = NULL; |
|
1914 |
|
1915 pci_free_consistent(pdev, rx_ring->size, rx_ring->desc, rx_ring->dma); |
|
1916 |
|
1917 rx_ring->desc = NULL; |
|
1918 } |
|
1919 |
|
1920 /** |
|
1921 * e1000_free_all_rx_resources - Free Rx Resources for All Queues |
|
1922 * @adapter: board private structure |
|
1923 * |
|
1924 * Free all receive software resources |
|
1925 **/ |
|
1926 |
|
1927 void e1000_free_all_rx_resources(struct e1000_adapter *adapter) |
|
1928 { |
|
1929 int i; |
|
1930 |
|
1931 for (i = 0; i < adapter->num_rx_queues; i++) |
|
1932 e1000_free_rx_resources(adapter, &adapter->rx_ring[i]); |
|
1933 } |
|
1934 |
|
1935 /** |
|
1936 * e1000_clean_rx_ring - Free Rx Buffers per Queue |
|
1937 * @adapter: board private structure |
|
1938 * @rx_ring: ring to free buffers from |
|
1939 **/ |
|
1940 |
|
1941 static void e1000_clean_rx_ring(struct e1000_adapter *adapter, |
|
1942 struct e1000_rx_ring *rx_ring) |
|
1943 { |
|
1944 struct e1000_hw *hw = &adapter->hw; |
|
1945 struct e1000_buffer *buffer_info; |
|
1946 struct pci_dev *pdev = adapter->pdev; |
|
1947 unsigned long size; |
|
1948 unsigned int i; |
|
1949 |
|
1950 /* Free all the Rx ring sk_buffs */ |
|
1951 for (i = 0; i < rx_ring->count; i++) { |
|
1952 buffer_info = &rx_ring->buffer_info[i]; |
|
1953 if (buffer_info->dma && |
|
1954 adapter->clean_rx == e1000_clean_rx_irq) { |
|
1955 pci_unmap_single(pdev, buffer_info->dma, |
|
1956 buffer_info->length, |
|
1957 PCI_DMA_FROMDEVICE); |
|
1958 } else if (buffer_info->dma && |
|
1959 adapter->clean_rx == e1000_clean_jumbo_rx_irq) { |
|
1960 pci_unmap_page(pdev, buffer_info->dma, |
|
1961 buffer_info->length, |
|
1962 PCI_DMA_FROMDEVICE); |
|
1963 } |
|
1964 |
|
1965 buffer_info->dma = 0; |
|
1966 if (buffer_info->page) { |
|
1967 put_page(buffer_info->page); |
|
1968 buffer_info->page = NULL; |
|
1969 } |
|
1970 if (buffer_info->skb) { |
|
1971 dev_kfree_skb(buffer_info->skb); |
|
1972 buffer_info->skb = NULL; |
|
1973 } |
|
1974 } |
|
1975 |
|
1976 /* there also may be some cached data from a chained receive */ |
|
1977 if (rx_ring->rx_skb_top) { |
|
1978 dev_kfree_skb(rx_ring->rx_skb_top); |
|
1979 rx_ring->rx_skb_top = NULL; |
|
1980 } |
|
1981 |
|
1982 size = sizeof(struct e1000_buffer) * rx_ring->count; |
|
1983 memset(rx_ring->buffer_info, 0, size); |
|
1984 |
|
1985 /* Zero out the descriptor ring */ |
|
1986 memset(rx_ring->desc, 0, rx_ring->size); |
|
1987 |
|
1988 rx_ring->next_to_clean = 0; |
|
1989 rx_ring->next_to_use = 0; |
|
1990 |
|
1991 writel(0, hw->hw_addr + rx_ring->rdh); |
|
1992 writel(0, hw->hw_addr + rx_ring->rdt); |
|
1993 } |
|
1994 |
|
1995 /** |
|
1996 * e1000_clean_all_rx_rings - Free Rx Buffers for all queues |
|
1997 * @adapter: board private structure |
|
1998 **/ |
|
1999 |
|
2000 static void e1000_clean_all_rx_rings(struct e1000_adapter *adapter) |
|
2001 { |
|
2002 int i; |
|
2003 |
|
2004 for (i = 0; i < adapter->num_rx_queues; i++) |
|
2005 e1000_clean_rx_ring(adapter, &adapter->rx_ring[i]); |
|
2006 } |
|
2007 |
|
2008 /* The 82542 2.0 (revision 2) needs to have the receive unit in reset |
|
2009 * and memory write and invalidate disabled for certain operations |
|
2010 */ |
|
2011 static void e1000_enter_82542_rst(struct e1000_adapter *adapter) |
|
2012 { |
|
2013 struct e1000_hw *hw = &adapter->hw; |
|
2014 struct net_device *netdev = adapter->netdev; |
|
2015 u32 rctl; |
|
2016 |
|
2017 e1000_pci_clear_mwi(hw); |
|
2018 |
|
2019 rctl = er32(RCTL); |
|
2020 rctl |= E1000_RCTL_RST; |
|
2021 ew32(RCTL, rctl); |
|
2022 E1000_WRITE_FLUSH(); |
|
2023 mdelay(5); |
|
2024 |
|
2025 if (netif_running(netdev)) |
|
2026 e1000_clean_all_rx_rings(adapter); |
|
2027 } |
|
2028 |
|
2029 static void e1000_leave_82542_rst(struct e1000_adapter *adapter) |
|
2030 { |
|
2031 struct e1000_hw *hw = &adapter->hw; |
|
2032 struct net_device *netdev = adapter->netdev; |
|
2033 u32 rctl; |
|
2034 |
|
2035 rctl = er32(RCTL); |
|
2036 rctl &= ~E1000_RCTL_RST; |
|
2037 ew32(RCTL, rctl); |
|
2038 E1000_WRITE_FLUSH(); |
|
2039 mdelay(5); |
|
2040 |
|
2041 if (hw->pci_cmd_word & PCI_COMMAND_INVALIDATE) |
|
2042 e1000_pci_set_mwi(hw); |
|
2043 |
|
2044 if (netif_running(netdev)) { |
|
2045 /* No need to loop, because 82542 supports only 1 queue */ |
|
2046 struct e1000_rx_ring *ring = &adapter->rx_ring[0]; |
|
2047 e1000_configure_rx(adapter); |
|
2048 adapter->alloc_rx_buf(adapter, ring, E1000_DESC_UNUSED(ring)); |
|
2049 } |
|
2050 } |
|
2051 |
|
2052 /** |
|
2053 * e1000_set_mac - Change the Ethernet Address of the NIC |
|
2054 * @netdev: network interface device structure |
|
2055 * @p: pointer to an address structure |
|
2056 * |
|
2057 * Returns 0 on success, negative on failure |
|
2058 **/ |
|
2059 |
|
2060 static int e1000_set_mac(struct net_device *netdev, void *p) |
|
2061 { |
|
2062 struct e1000_adapter *adapter = netdev_priv(netdev); |
|
2063 struct e1000_hw *hw = &adapter->hw; |
|
2064 struct sockaddr *addr = p; |
|
2065 |
|
2066 if (!is_valid_ether_addr(addr->sa_data)) |
|
2067 return -EADDRNOTAVAIL; |
|
2068 |
|
2069 /* 82542 2.0 needs to be in reset to write receive address registers */ |
|
2070 |
|
2071 if (hw->mac_type == e1000_82542_rev2_0) |
|
2072 e1000_enter_82542_rst(adapter); |
|
2073 |
|
2074 memcpy(netdev->dev_addr, addr->sa_data, netdev->addr_len); |
|
2075 memcpy(hw->mac_addr, addr->sa_data, netdev->addr_len); |
|
2076 |
|
2077 e1000_rar_set(hw, hw->mac_addr, 0); |
|
2078 |
|
2079 if (hw->mac_type == e1000_82542_rev2_0) |
|
2080 e1000_leave_82542_rst(adapter); |
|
2081 |
|
2082 return 0; |
|
2083 } |
|
2084 |
|
2085 /** |
|
2086 * e1000_set_rx_mode - Secondary Unicast, Multicast and Promiscuous mode set |
|
2087 * @netdev: network interface device structure |
|
2088 * |
|
2089 * The set_rx_mode entry point is called whenever the unicast or multicast |
|
2090 * address lists or the network interface flags are updated. This routine is |
|
2091 * responsible for configuring the hardware for proper unicast, multicast, |
|
2092 * promiscuous mode, and all-multi behavior. |
|
2093 **/ |
|
2094 |
|
2095 static void e1000_set_rx_mode(struct net_device *netdev) |
|
2096 { |
|
2097 struct e1000_adapter *adapter = netdev_priv(netdev); |
|
2098 struct e1000_hw *hw = &adapter->hw; |
|
2099 struct netdev_hw_addr *ha; |
|
2100 bool use_uc = false; |
|
2101 struct dev_addr_list *mc_ptr; |
|
2102 u32 rctl; |
|
2103 u32 hash_value; |
|
2104 int i, rar_entries = E1000_RAR_ENTRIES; |
|
2105 int mta_reg_count = E1000_NUM_MTA_REGISTERS; |
|
2106 u32 *mcarray = kcalloc(mta_reg_count, sizeof(u32), GFP_ATOMIC); |
|
2107 |
|
2108 if (!mcarray) { |
|
2109 DPRINTK(PROBE, ERR, "memory allocation failed\n"); |
|
2110 return; |
|
2111 } |
|
2112 |
|
2113 /* Check for Promiscuous and All Multicast modes */ |
|
2114 |
|
2115 rctl = er32(RCTL); |
|
2116 |
|
2117 if (netdev->flags & IFF_PROMISC) { |
|
2118 rctl |= (E1000_RCTL_UPE | E1000_RCTL_MPE); |
|
2119 rctl &= ~E1000_RCTL_VFE; |
|
2120 } else { |
|
2121 if (netdev->flags & IFF_ALLMULTI) |
|
2122 rctl |= E1000_RCTL_MPE; |
|
2123 else |
|
2124 rctl &= ~E1000_RCTL_MPE; |
|
2125 /* Enable VLAN filter if there is a VLAN */ |
|
2126 if (adapter->vlgrp) |
|
2127 rctl |= E1000_RCTL_VFE; |
|
2128 } |
|
2129 |
|
2130 if (netdev->uc.count > rar_entries - 1) { |
|
2131 rctl |= E1000_RCTL_UPE; |
|
2132 } else if (!(netdev->flags & IFF_PROMISC)) { |
|
2133 rctl &= ~E1000_RCTL_UPE; |
|
2134 use_uc = true; |
|
2135 } |
|
2136 |
|
2137 ew32(RCTL, rctl); |
|
2138 |
|
2139 /* 82542 2.0 needs to be in reset to write receive address registers */ |
|
2140 |
|
2141 if (hw->mac_type == e1000_82542_rev2_0) |
|
2142 e1000_enter_82542_rst(adapter); |
|
2143 |
|
2144 /* load the first 14 addresses into the exact filters 1-14. Unicast |
|
2145 * addresses take precedence to avoid disabling unicast filtering |
|
2146 * when possible. |
|
2147 * |
|
2148 * RAR 0 is used for the station MAC adddress |
|
2149 * if there are not 14 addresses, go ahead and clear the filters |
|
2150 */ |
|
2151 i = 1; |
|
2152 if (use_uc) |
|
2153 list_for_each_entry(ha, &netdev->uc.list, list) { |
|
2154 if (i == rar_entries) |
|
2155 break; |
|
2156 e1000_rar_set(hw, ha->addr, i++); |
|
2157 } |
|
2158 |
|
2159 WARN_ON(i == rar_entries); |
|
2160 |
|
2161 mc_ptr = netdev->mc_list; |
|
2162 |
|
2163 for (; i < rar_entries; i++) { |
|
2164 if (mc_ptr) { |
|
2165 e1000_rar_set(hw, mc_ptr->da_addr, i); |
|
2166 mc_ptr = mc_ptr->next; |
|
2167 } else { |
|
2168 E1000_WRITE_REG_ARRAY(hw, RA, i << 1, 0); |
|
2169 E1000_WRITE_FLUSH(); |
|
2170 E1000_WRITE_REG_ARRAY(hw, RA, (i << 1) + 1, 0); |
|
2171 E1000_WRITE_FLUSH(); |
|
2172 } |
|
2173 } |
|
2174 |
|
2175 /* load any remaining addresses into the hash table */ |
|
2176 |
|
2177 for (; mc_ptr; mc_ptr = mc_ptr->next) { |
|
2178 u32 hash_reg, hash_bit, mta; |
|
2179 hash_value = e1000_hash_mc_addr(hw, mc_ptr->da_addr); |
|
2180 hash_reg = (hash_value >> 5) & 0x7F; |
|
2181 hash_bit = hash_value & 0x1F; |
|
2182 mta = (1 << hash_bit); |
|
2183 mcarray[hash_reg] |= mta; |
|
2184 } |
|
2185 |
|
2186 /* write the hash table completely, write from bottom to avoid |
|
2187 * both stupid write combining chipsets, and flushing each write */ |
|
2188 for (i = mta_reg_count - 1; i >= 0 ; i--) { |
|
2189 /* |
|
2190 * If we are on an 82544 has an errata where writing odd |
|
2191 * offsets overwrites the previous even offset, but writing |
|
2192 * backwards over the range solves the issue by always |
|
2193 * writing the odd offset first |
|
2194 */ |
|
2195 E1000_WRITE_REG_ARRAY(hw, MTA, i, mcarray[i]); |
|
2196 } |
|
2197 E1000_WRITE_FLUSH(); |
|
2198 |
|
2199 if (hw->mac_type == e1000_82542_rev2_0) |
|
2200 e1000_leave_82542_rst(adapter); |
|
2201 |
|
2202 kfree(mcarray); |
|
2203 } |
|
2204 |
|
2205 /* Need to wait a few seconds after link up to get diagnostic information from |
|
2206 * the phy */ |
|
2207 |
|
2208 static void e1000_update_phy_info(unsigned long data) |
|
2209 { |
|
2210 struct e1000_adapter *adapter = (struct e1000_adapter *)data; |
|
2211 struct e1000_hw *hw = &adapter->hw; |
|
2212 e1000_phy_get_info(hw, &adapter->phy_info); |
|
2213 } |
|
2214 |
|
2215 /** |
|
2216 * e1000_82547_tx_fifo_stall - Timer Call-back |
|
2217 * @data: pointer to adapter cast into an unsigned long |
|
2218 **/ |
|
2219 |
|
2220 static void e1000_82547_tx_fifo_stall(unsigned long data) |
|
2221 { |
|
2222 struct e1000_adapter *adapter = (struct e1000_adapter *)data; |
|
2223 struct e1000_hw *hw = &adapter->hw; |
|
2224 struct net_device *netdev = adapter->netdev; |
|
2225 u32 tctl; |
|
2226 |
|
2227 if (atomic_read(&adapter->tx_fifo_stall)) { |
|
2228 if ((er32(TDT) == er32(TDH)) && |
|
2229 (er32(TDFT) == er32(TDFH)) && |
|
2230 (er32(TDFTS) == er32(TDFHS))) { |
|
2231 tctl = er32(TCTL); |
|
2232 ew32(TCTL, tctl & ~E1000_TCTL_EN); |
|
2233 ew32(TDFT, adapter->tx_head_addr); |
|
2234 ew32(TDFH, adapter->tx_head_addr); |
|
2235 ew32(TDFTS, adapter->tx_head_addr); |
|
2236 ew32(TDFHS, adapter->tx_head_addr); |
|
2237 ew32(TCTL, tctl); |
|
2238 E1000_WRITE_FLUSH(); |
|
2239 |
|
2240 adapter->tx_fifo_head = 0; |
|
2241 atomic_set(&adapter->tx_fifo_stall, 0); |
|
2242 netif_wake_queue(netdev); |
|
2243 } else if (!test_bit(__E1000_DOWN, &adapter->flags)) { |
|
2244 mod_timer(&adapter->tx_fifo_stall_timer, jiffies + 1); |
|
2245 } |
|
2246 } |
|
2247 } |
|
2248 |
|
2249 static bool e1000_has_link(struct e1000_adapter *adapter) |
|
2250 { |
|
2251 struct e1000_hw *hw = &adapter->hw; |
|
2252 bool link_active = false; |
|
2253 |
|
2254 /* get_link_status is set on LSC (link status) interrupt or |
|
2255 * rx sequence error interrupt. get_link_status will stay |
|
2256 * false until the e1000_check_for_link establishes link |
|
2257 * for copper adapters ONLY |
|
2258 */ |
|
2259 switch (hw->media_type) { |
|
2260 case e1000_media_type_copper: |
|
2261 if (hw->get_link_status) { |
|
2262 e1000_check_for_link(hw); |
|
2263 link_active = !hw->get_link_status; |
|
2264 } else { |
|
2265 link_active = true; |
|
2266 } |
|
2267 break; |
|
2268 case e1000_media_type_fiber: |
|
2269 e1000_check_for_link(hw); |
|
2270 link_active = !!(er32(STATUS) & E1000_STATUS_LU); |
|
2271 break; |
|
2272 case e1000_media_type_internal_serdes: |
|
2273 e1000_check_for_link(hw); |
|
2274 link_active = hw->serdes_has_link; |
|
2275 break; |
|
2276 default: |
|
2277 break; |
|
2278 } |
|
2279 |
|
2280 return link_active; |
|
2281 } |
|
2282 |
|
2283 /** |
|
2284 * e1000_watchdog - Timer Call-back |
|
2285 * @data: pointer to adapter cast into an unsigned long |
|
2286 **/ |
|
2287 static void e1000_watchdog(unsigned long data) |
|
2288 { |
|
2289 struct e1000_adapter *adapter = (struct e1000_adapter *)data; |
|
2290 struct e1000_hw *hw = &adapter->hw; |
|
2291 struct net_device *netdev = adapter->netdev; |
|
2292 struct e1000_tx_ring *txdr = adapter->tx_ring; |
|
2293 u32 link, tctl; |
|
2294 |
|
2295 link = e1000_has_link(adapter); |
|
2296 if ((netif_carrier_ok(netdev)) && link) |
|
2297 goto link_up; |
|
2298 |
|
2299 if (link) { |
|
2300 if (!netif_carrier_ok(netdev)) { |
|
2301 u32 ctrl; |
|
2302 bool txb2b = true; |
|
2303 /* update snapshot of PHY registers on LSC */ |
|
2304 e1000_get_speed_and_duplex(hw, |
|
2305 &adapter->link_speed, |
|
2306 &adapter->link_duplex); |
|
2307 |
|
2308 ctrl = er32(CTRL); |
|
2309 printk(KERN_INFO "e1000: %s NIC Link is Up %d Mbps %s, " |
|
2310 "Flow Control: %s\n", |
|
2311 netdev->name, |
|
2312 adapter->link_speed, |
|
2313 adapter->link_duplex == FULL_DUPLEX ? |
|
2314 "Full Duplex" : "Half Duplex", |
|
2315 ((ctrl & E1000_CTRL_TFCE) && (ctrl & |
|
2316 E1000_CTRL_RFCE)) ? "RX/TX" : ((ctrl & |
|
2317 E1000_CTRL_RFCE) ? "RX" : ((ctrl & |
|
2318 E1000_CTRL_TFCE) ? "TX" : "None" ))); |
|
2319 |
|
2320 /* tweak tx_queue_len according to speed/duplex |
|
2321 * and adjust the timeout factor */ |
|
2322 netdev->tx_queue_len = adapter->tx_queue_len; |
|
2323 adapter->tx_timeout_factor = 1; |
|
2324 switch (adapter->link_speed) { |
|
2325 case SPEED_10: |
|
2326 txb2b = false; |
|
2327 netdev->tx_queue_len = 10; |
|
2328 adapter->tx_timeout_factor = 16; |
|
2329 break; |
|
2330 case SPEED_100: |
|
2331 txb2b = false; |
|
2332 netdev->tx_queue_len = 100; |
|
2333 /* maybe add some timeout factor ? */ |
|
2334 break; |
|
2335 } |
|
2336 |
|
2337 /* enable transmits in the hardware */ |
|
2338 tctl = er32(TCTL); |
|
2339 tctl |= E1000_TCTL_EN; |
|
2340 ew32(TCTL, tctl); |
|
2341 |
|
2342 netif_carrier_on(netdev); |
|
2343 if (!test_bit(__E1000_DOWN, &adapter->flags)) |
|
2344 mod_timer(&adapter->phy_info_timer, |
|
2345 round_jiffies(jiffies + 2 * HZ)); |
|
2346 adapter->smartspeed = 0; |
|
2347 } |
|
2348 } else { |
|
2349 if (netif_carrier_ok(netdev)) { |
|
2350 adapter->link_speed = 0; |
|
2351 adapter->link_duplex = 0; |
|
2352 printk(KERN_INFO "e1000: %s NIC Link is Down\n", |
|
2353 netdev->name); |
|
2354 netif_carrier_off(netdev); |
|
2355 |
|
2356 if (!test_bit(__E1000_DOWN, &adapter->flags)) |
|
2357 mod_timer(&adapter->phy_info_timer, |
|
2358 round_jiffies(jiffies + 2 * HZ)); |
|
2359 } |
|
2360 |
|
2361 e1000_smartspeed(adapter); |
|
2362 } |
|
2363 |
|
2364 link_up: |
|
2365 e1000_update_stats(adapter); |
|
2366 |
|
2367 hw->tx_packet_delta = adapter->stats.tpt - adapter->tpt_old; |
|
2368 adapter->tpt_old = adapter->stats.tpt; |
|
2369 hw->collision_delta = adapter->stats.colc - adapter->colc_old; |
|
2370 adapter->colc_old = adapter->stats.colc; |
|
2371 |
|
2372 adapter->gorcl = adapter->stats.gorcl - adapter->gorcl_old; |
|
2373 adapter->gorcl_old = adapter->stats.gorcl; |
|
2374 adapter->gotcl = adapter->stats.gotcl - adapter->gotcl_old; |
|
2375 adapter->gotcl_old = adapter->stats.gotcl; |
|
2376 |
|
2377 e1000_update_adaptive(hw); |
|
2378 |
|
2379 if (!netif_carrier_ok(netdev)) { |
|
2380 if (E1000_DESC_UNUSED(txdr) + 1 < txdr->count) { |
|
2381 /* We've lost link, so the controller stops DMA, |
|
2382 * but we've got queued Tx work that's never going |
|
2383 * to get done, so reset controller to flush Tx. |
|
2384 * (Do the reset outside of interrupt context). */ |
|
2385 adapter->tx_timeout_count++; |
|
2386 schedule_work(&adapter->reset_task); |
|
2387 /* return immediately since reset is imminent */ |
|
2388 return; |
|
2389 } |
|
2390 } |
|
2391 |
|
2392 /* Cause software interrupt to ensure rx ring is cleaned */ |
|
2393 ew32(ICS, E1000_ICS_RXDMT0); |
|
2394 |
|
2395 /* Force detection of hung controller every watchdog period */ |
|
2396 adapter->detect_tx_hung = true; |
|
2397 |
|
2398 /* Reset the timer */ |
|
2399 if (!test_bit(__E1000_DOWN, &adapter->flags)) |
|
2400 mod_timer(&adapter->watchdog_timer, |
|
2401 round_jiffies(jiffies + 2 * HZ)); |
|
2402 } |
|
2403 |
|
2404 enum latency_range { |
|
2405 lowest_latency = 0, |
|
2406 low_latency = 1, |
|
2407 bulk_latency = 2, |
|
2408 latency_invalid = 255 |
|
2409 }; |
|
2410 |
|
2411 /** |
|
2412 * e1000_update_itr - update the dynamic ITR value based on statistics |
|
2413 * @adapter: pointer to adapter |
|
2414 * @itr_setting: current adapter->itr |
|
2415 * @packets: the number of packets during this measurement interval |
|
2416 * @bytes: the number of bytes during this measurement interval |
|
2417 * |
|
2418 * Stores a new ITR value based on packets and byte |
|
2419 * counts during the last interrupt. The advantage of per interrupt |
|
2420 * computation is faster updates and more accurate ITR for the current |
|
2421 * traffic pattern. Constants in this function were computed |
|
2422 * based on theoretical maximum wire speed and thresholds were set based |
|
2423 * on testing data as well as attempting to minimize response time |
|
2424 * while increasing bulk throughput. |
|
2425 * this functionality is controlled by the InterruptThrottleRate module |
|
2426 * parameter (see e1000_param.c) |
|
2427 **/ |
|
2428 static unsigned int e1000_update_itr(struct e1000_adapter *adapter, |
|
2429 u16 itr_setting, int packets, int bytes) |
|
2430 { |
|
2431 unsigned int retval = itr_setting; |
|
2432 struct e1000_hw *hw = &adapter->hw; |
|
2433 |
|
2434 if (unlikely(hw->mac_type < e1000_82540)) |
|
2435 goto update_itr_done; |
|
2436 |
|
2437 if (packets == 0) |
|
2438 goto update_itr_done; |
|
2439 |
|
2440 switch (itr_setting) { |
|
2441 case lowest_latency: |
|
2442 /* jumbo frames get bulk treatment*/ |
|
2443 if (bytes/packets > 8000) |
|
2444 retval = bulk_latency; |
|
2445 else if ((packets < 5) && (bytes > 512)) |
|
2446 retval = low_latency; |
|
2447 break; |
|
2448 case low_latency: /* 50 usec aka 20000 ints/s */ |
|
2449 if (bytes > 10000) { |
|
2450 /* jumbo frames need bulk latency setting */ |
|
2451 if (bytes/packets > 8000) |
|
2452 retval = bulk_latency; |
|
2453 else if ((packets < 10) || ((bytes/packets) > 1200)) |
|
2454 retval = bulk_latency; |
|
2455 else if ((packets > 35)) |
|
2456 retval = lowest_latency; |
|
2457 } else if (bytes/packets > 2000) |
|
2458 retval = bulk_latency; |
|
2459 else if (packets <= 2 && bytes < 512) |
|
2460 retval = lowest_latency; |
|
2461 break; |
|
2462 case bulk_latency: /* 250 usec aka 4000 ints/s */ |
|
2463 if (bytes > 25000) { |
|
2464 if (packets > 35) |
|
2465 retval = low_latency; |
|
2466 } else if (bytes < 6000) { |
|
2467 retval = low_latency; |
|
2468 } |
|
2469 break; |
|
2470 } |
|
2471 |
|
2472 update_itr_done: |
|
2473 return retval; |
|
2474 } |
|
2475 |
|
2476 static void e1000_set_itr(struct e1000_adapter *adapter) |
|
2477 { |
|
2478 struct e1000_hw *hw = &adapter->hw; |
|
2479 u16 current_itr; |
|
2480 u32 new_itr = adapter->itr; |
|
2481 |
|
2482 if (unlikely(hw->mac_type < e1000_82540)) |
|
2483 return; |
|
2484 |
|
2485 /* for non-gigabit speeds, just fix the interrupt rate at 4000 */ |
|
2486 if (unlikely(adapter->link_speed != SPEED_1000)) { |
|
2487 current_itr = 0; |
|
2488 new_itr = 4000; |
|
2489 goto set_itr_now; |
|
2490 } |
|
2491 |
|
2492 adapter->tx_itr = e1000_update_itr(adapter, |
|
2493 adapter->tx_itr, |
|
2494 adapter->total_tx_packets, |
|
2495 adapter->total_tx_bytes); |
|
2496 /* conservative mode (itr 3) eliminates the lowest_latency setting */ |
|
2497 if (adapter->itr_setting == 3 && adapter->tx_itr == lowest_latency) |
|
2498 adapter->tx_itr = low_latency; |
|
2499 |
|
2500 adapter->rx_itr = e1000_update_itr(adapter, |
|
2501 adapter->rx_itr, |
|
2502 adapter->total_rx_packets, |
|
2503 adapter->total_rx_bytes); |
|
2504 /* conservative mode (itr 3) eliminates the lowest_latency setting */ |
|
2505 if (adapter->itr_setting == 3 && adapter->rx_itr == lowest_latency) |
|
2506 adapter->rx_itr = low_latency; |
|
2507 |
|
2508 current_itr = max(adapter->rx_itr, adapter->tx_itr); |
|
2509 |
|
2510 switch (current_itr) { |
|
2511 /* counts and packets in update_itr are dependent on these numbers */ |
|
2512 case lowest_latency: |
|
2513 new_itr = 70000; |
|
2514 break; |
|
2515 case low_latency: |
|
2516 new_itr = 20000; /* aka hwitr = ~200 */ |
|
2517 break; |
|
2518 case bulk_latency: |
|
2519 new_itr = 4000; |
|
2520 break; |
|
2521 default: |
|
2522 break; |
|
2523 } |
|
2524 |
|
2525 set_itr_now: |
|
2526 if (new_itr != adapter->itr) { |
|
2527 /* this attempts to bias the interrupt rate towards Bulk |
|
2528 * by adding intermediate steps when interrupt rate is |
|
2529 * increasing */ |
|
2530 new_itr = new_itr > adapter->itr ? |
|
2531 min(adapter->itr + (new_itr >> 2), new_itr) : |
|
2532 new_itr; |
|
2533 adapter->itr = new_itr; |
|
2534 ew32(ITR, 1000000000 / (new_itr * 256)); |
|
2535 } |
|
2536 |
|
2537 return; |
|
2538 } |
|
2539 |
|
2540 #define E1000_TX_FLAGS_CSUM 0x00000001 |
|
2541 #define E1000_TX_FLAGS_VLAN 0x00000002 |
|
2542 #define E1000_TX_FLAGS_TSO 0x00000004 |
|
2543 #define E1000_TX_FLAGS_IPV4 0x00000008 |
|
2544 #define E1000_TX_FLAGS_VLAN_MASK 0xffff0000 |
|
2545 #define E1000_TX_FLAGS_VLAN_SHIFT 16 |
|
2546 |
|
2547 static int e1000_tso(struct e1000_adapter *adapter, |
|
2548 struct e1000_tx_ring *tx_ring, struct sk_buff *skb) |
|
2549 { |
|
2550 struct e1000_context_desc *context_desc; |
|
2551 struct e1000_buffer *buffer_info; |
|
2552 unsigned int i; |
|
2553 u32 cmd_length = 0; |
|
2554 u16 ipcse = 0, tucse, mss; |
|
2555 u8 ipcss, ipcso, tucss, tucso, hdr_len; |
|
2556 int err; |
|
2557 |
|
2558 if (skb_is_gso(skb)) { |
|
2559 if (skb_header_cloned(skb)) { |
|
2560 err = pskb_expand_head(skb, 0, 0, GFP_ATOMIC); |
|
2561 if (err) |
|
2562 return err; |
|
2563 } |
|
2564 |
|
2565 hdr_len = skb_transport_offset(skb) + tcp_hdrlen(skb); |
|
2566 mss = skb_shinfo(skb)->gso_size; |
|
2567 if (skb->protocol == htons(ETH_P_IP)) { |
|
2568 struct iphdr *iph = ip_hdr(skb); |
|
2569 iph->tot_len = 0; |
|
2570 iph->check = 0; |
|
2571 tcp_hdr(skb)->check = ~csum_tcpudp_magic(iph->saddr, |
|
2572 iph->daddr, 0, |
|
2573 IPPROTO_TCP, |
|
2574 0); |
|
2575 cmd_length = E1000_TXD_CMD_IP; |
|
2576 ipcse = skb_transport_offset(skb) - 1; |
|
2577 } else if (skb->protocol == htons(ETH_P_IPV6)) { |
|
2578 ipv6_hdr(skb)->payload_len = 0; |
|
2579 tcp_hdr(skb)->check = |
|
2580 ~csum_ipv6_magic(&ipv6_hdr(skb)->saddr, |
|
2581 &ipv6_hdr(skb)->daddr, |
|
2582 0, IPPROTO_TCP, 0); |
|
2583 ipcse = 0; |
|
2584 } |
|
2585 ipcss = skb_network_offset(skb); |
|
2586 ipcso = (void *)&(ip_hdr(skb)->check) - (void *)skb->data; |
|
2587 tucss = skb_transport_offset(skb); |
|
2588 tucso = (void *)&(tcp_hdr(skb)->check) - (void *)skb->data; |
|
2589 tucse = 0; |
|
2590 |
|
2591 cmd_length |= (E1000_TXD_CMD_DEXT | E1000_TXD_CMD_TSE | |
|
2592 E1000_TXD_CMD_TCP | (skb->len - (hdr_len))); |
|
2593 |
|
2594 i = tx_ring->next_to_use; |
|
2595 context_desc = E1000_CONTEXT_DESC(*tx_ring, i); |
|
2596 buffer_info = &tx_ring->buffer_info[i]; |
|
2597 |
|
2598 context_desc->lower_setup.ip_fields.ipcss = ipcss; |
|
2599 context_desc->lower_setup.ip_fields.ipcso = ipcso; |
|
2600 context_desc->lower_setup.ip_fields.ipcse = cpu_to_le16(ipcse); |
|
2601 context_desc->upper_setup.tcp_fields.tucss = tucss; |
|
2602 context_desc->upper_setup.tcp_fields.tucso = tucso; |
|
2603 context_desc->upper_setup.tcp_fields.tucse = cpu_to_le16(tucse); |
|
2604 context_desc->tcp_seg_setup.fields.mss = cpu_to_le16(mss); |
|
2605 context_desc->tcp_seg_setup.fields.hdr_len = hdr_len; |
|
2606 context_desc->cmd_and_length = cpu_to_le32(cmd_length); |
|
2607 |
|
2608 buffer_info->time_stamp = jiffies; |
|
2609 buffer_info->next_to_watch = i; |
|
2610 |
|
2611 if (++i == tx_ring->count) i = 0; |
|
2612 tx_ring->next_to_use = i; |
|
2613 |
|
2614 return true; |
|
2615 } |
|
2616 return false; |
|
2617 } |
|
2618 |
|
2619 static bool e1000_tx_csum(struct e1000_adapter *adapter, |
|
2620 struct e1000_tx_ring *tx_ring, struct sk_buff *skb) |
|
2621 { |
|
2622 struct e1000_context_desc *context_desc; |
|
2623 struct e1000_buffer *buffer_info; |
|
2624 unsigned int i; |
|
2625 u8 css; |
|
2626 u32 cmd_len = E1000_TXD_CMD_DEXT; |
|
2627 |
|
2628 if (skb->ip_summed != CHECKSUM_PARTIAL) |
|
2629 return false; |
|
2630 |
|
2631 switch (skb->protocol) { |
|
2632 case cpu_to_be16(ETH_P_IP): |
|
2633 if (ip_hdr(skb)->protocol == IPPROTO_TCP) |
|
2634 cmd_len |= E1000_TXD_CMD_TCP; |
|
2635 break; |
|
2636 case cpu_to_be16(ETH_P_IPV6): |
|
2637 /* XXX not handling all IPV6 headers */ |
|
2638 if (ipv6_hdr(skb)->nexthdr == IPPROTO_TCP) |
|
2639 cmd_len |= E1000_TXD_CMD_TCP; |
|
2640 break; |
|
2641 default: |
|
2642 if (unlikely(net_ratelimit())) |
|
2643 DPRINTK(DRV, WARNING, |
|
2644 "checksum_partial proto=%x!\n", skb->protocol); |
|
2645 break; |
|
2646 } |
|
2647 |
|
2648 css = skb_transport_offset(skb); |
|
2649 |
|
2650 i = tx_ring->next_to_use; |
|
2651 buffer_info = &tx_ring->buffer_info[i]; |
|
2652 context_desc = E1000_CONTEXT_DESC(*tx_ring, i); |
|
2653 |
|
2654 context_desc->lower_setup.ip_config = 0; |
|
2655 context_desc->upper_setup.tcp_fields.tucss = css; |
|
2656 context_desc->upper_setup.tcp_fields.tucso = |
|
2657 css + skb->csum_offset; |
|
2658 context_desc->upper_setup.tcp_fields.tucse = 0; |
|
2659 context_desc->tcp_seg_setup.data = 0; |
|
2660 context_desc->cmd_and_length = cpu_to_le32(cmd_len); |
|
2661 |
|
2662 buffer_info->time_stamp = jiffies; |
|
2663 buffer_info->next_to_watch = i; |
|
2664 |
|
2665 if (unlikely(++i == tx_ring->count)) i = 0; |
|
2666 tx_ring->next_to_use = i; |
|
2667 |
|
2668 return true; |
|
2669 } |
|
2670 |
|
2671 #define E1000_MAX_TXD_PWR 12 |
|
2672 #define E1000_MAX_DATA_PER_TXD (1<<E1000_MAX_TXD_PWR) |
|
2673 |
|
2674 static int e1000_tx_map(struct e1000_adapter *adapter, |
|
2675 struct e1000_tx_ring *tx_ring, |
|
2676 struct sk_buff *skb, unsigned int first, |
|
2677 unsigned int max_per_txd, unsigned int nr_frags, |
|
2678 unsigned int mss) |
|
2679 { |
|
2680 struct e1000_hw *hw = &adapter->hw; |
|
2681 struct pci_dev *pdev = adapter->pdev; |
|
2682 struct e1000_buffer *buffer_info; |
|
2683 unsigned int len = skb_headlen(skb); |
|
2684 unsigned int offset = 0, size, count = 0, i; |
|
2685 unsigned int f; |
|
2686 |
|
2687 i = tx_ring->next_to_use; |
|
2688 |
|
2689 while (len) { |
|
2690 buffer_info = &tx_ring->buffer_info[i]; |
|
2691 size = min(len, max_per_txd); |
|
2692 /* Workaround for Controller erratum -- |
|
2693 * descriptor for non-tso packet in a linear SKB that follows a |
|
2694 * tso gets written back prematurely before the data is fully |
|
2695 * DMA'd to the controller */ |
|
2696 if (!skb->data_len && tx_ring->last_tx_tso && |
|
2697 !skb_is_gso(skb)) { |
|
2698 tx_ring->last_tx_tso = 0; |
|
2699 size -= 4; |
|
2700 } |
|
2701 |
|
2702 /* Workaround for premature desc write-backs |
|
2703 * in TSO mode. Append 4-byte sentinel desc */ |
|
2704 if (unlikely(mss && !nr_frags && size == len && size > 8)) |
|
2705 size -= 4; |
|
2706 /* work-around for errata 10 and it applies |
|
2707 * to all controllers in PCI-X mode |
|
2708 * The fix is to make sure that the first descriptor of a |
|
2709 * packet is smaller than 2048 - 16 - 16 (or 2016) bytes |
|
2710 */ |
|
2711 if (unlikely((hw->bus_type == e1000_bus_type_pcix) && |
|
2712 (size > 2015) && count == 0)) |
|
2713 size = 2015; |
|
2714 |
|
2715 /* Workaround for potential 82544 hang in PCI-X. Avoid |
|
2716 * terminating buffers within evenly-aligned dwords. */ |
|
2717 if (unlikely(adapter->pcix_82544 && |
|
2718 !((unsigned long)(skb->data + offset + size - 1) & 4) && |
|
2719 size > 4)) |
|
2720 size -= 4; |
|
2721 |
|
2722 buffer_info->length = size; |
|
2723 /* set time_stamp *before* dma to help avoid a possible race */ |
|
2724 buffer_info->time_stamp = jiffies; |
|
2725 buffer_info->mapped_as_page = false; |
|
2726 buffer_info->dma = pci_map_single(pdev, skb->data + offset, |
|
2727 size, PCI_DMA_TODEVICE); |
|
2728 if (pci_dma_mapping_error(pdev, buffer_info->dma)) |
|
2729 goto dma_error; |
|
2730 buffer_info->next_to_watch = i; |
|
2731 |
|
2732 len -= size; |
|
2733 offset += size; |
|
2734 count++; |
|
2735 if (len) { |
|
2736 i++; |
|
2737 if (unlikely(i == tx_ring->count)) |
|
2738 i = 0; |
|
2739 } |
|
2740 } |
|
2741 |
|
2742 for (f = 0; f < nr_frags; f++) { |
|
2743 struct skb_frag_struct *frag; |
|
2744 |
|
2745 frag = &skb_shinfo(skb)->frags[f]; |
|
2746 len = frag->size; |
|
2747 offset = frag->page_offset; |
|
2748 |
|
2749 while (len) { |
|
2750 i++; |
|
2751 if (unlikely(i == tx_ring->count)) |
|
2752 i = 0; |
|
2753 |
|
2754 buffer_info = &tx_ring->buffer_info[i]; |
|
2755 size = min(len, max_per_txd); |
|
2756 /* Workaround for premature desc write-backs |
|
2757 * in TSO mode. Append 4-byte sentinel desc */ |
|
2758 if (unlikely(mss && f == (nr_frags-1) && size == len && size > 8)) |
|
2759 size -= 4; |
|
2760 /* Workaround for potential 82544 hang in PCI-X. |
|
2761 * Avoid terminating buffers within evenly-aligned |
|
2762 * dwords. */ |
|
2763 if (unlikely(adapter->pcix_82544 && |
|
2764 !((unsigned long)(page_to_phys(frag->page) + offset |
|
2765 + size - 1) & 4) && |
|
2766 size > 4)) |
|
2767 size -= 4; |
|
2768 |
|
2769 buffer_info->length = size; |
|
2770 buffer_info->time_stamp = jiffies; |
|
2771 buffer_info->mapped_as_page = true; |
|
2772 buffer_info->dma = pci_map_page(pdev, frag->page, |
|
2773 offset, size, |
|
2774 PCI_DMA_TODEVICE); |
|
2775 if (pci_dma_mapping_error(pdev, buffer_info->dma)) |
|
2776 goto dma_error; |
|
2777 buffer_info->next_to_watch = i; |
|
2778 |
|
2779 len -= size; |
|
2780 offset += size; |
|
2781 count++; |
|
2782 } |
|
2783 } |
|
2784 |
|
2785 tx_ring->buffer_info[i].skb = skb; |
|
2786 tx_ring->buffer_info[first].next_to_watch = i; |
|
2787 |
|
2788 return count; |
|
2789 |
|
2790 dma_error: |
|
2791 dev_err(&pdev->dev, "TX DMA map failed\n"); |
|
2792 buffer_info->dma = 0; |
|
2793 if (count) |
|
2794 count--; |
|
2795 |
|
2796 while (count--) { |
|
2797 if (i==0) |
|
2798 i += tx_ring->count; |
|
2799 i--; |
|
2800 buffer_info = &tx_ring->buffer_info[i]; |
|
2801 e1000_unmap_and_free_tx_resource(adapter, buffer_info); |
|
2802 } |
|
2803 |
|
2804 return 0; |
|
2805 } |
|
2806 |
|
2807 static void e1000_tx_queue(struct e1000_adapter *adapter, |
|
2808 struct e1000_tx_ring *tx_ring, int tx_flags, |
|
2809 int count) |
|
2810 { |
|
2811 struct e1000_hw *hw = &adapter->hw; |
|
2812 struct e1000_tx_desc *tx_desc = NULL; |
|
2813 struct e1000_buffer *buffer_info; |
|
2814 u32 txd_upper = 0, txd_lower = E1000_TXD_CMD_IFCS; |
|
2815 unsigned int i; |
|
2816 |
|
2817 if (likely(tx_flags & E1000_TX_FLAGS_TSO)) { |
|
2818 txd_lower |= E1000_TXD_CMD_DEXT | E1000_TXD_DTYP_D | |
|
2819 E1000_TXD_CMD_TSE; |
|
2820 txd_upper |= E1000_TXD_POPTS_TXSM << 8; |
|
2821 |
|
2822 if (likely(tx_flags & E1000_TX_FLAGS_IPV4)) |
|
2823 txd_upper |= E1000_TXD_POPTS_IXSM << 8; |
|
2824 } |
|
2825 |
|
2826 if (likely(tx_flags & E1000_TX_FLAGS_CSUM)) { |
|
2827 txd_lower |= E1000_TXD_CMD_DEXT | E1000_TXD_DTYP_D; |
|
2828 txd_upper |= E1000_TXD_POPTS_TXSM << 8; |
|
2829 } |
|
2830 |
|
2831 if (unlikely(tx_flags & E1000_TX_FLAGS_VLAN)) { |
|
2832 txd_lower |= E1000_TXD_CMD_VLE; |
|
2833 txd_upper |= (tx_flags & E1000_TX_FLAGS_VLAN_MASK); |
|
2834 } |
|
2835 |
|
2836 i = tx_ring->next_to_use; |
|
2837 |
|
2838 while (count--) { |
|
2839 buffer_info = &tx_ring->buffer_info[i]; |
|
2840 tx_desc = E1000_TX_DESC(*tx_ring, i); |
|
2841 tx_desc->buffer_addr = cpu_to_le64(buffer_info->dma); |
|
2842 tx_desc->lower.data = |
|
2843 cpu_to_le32(txd_lower | buffer_info->length); |
|
2844 tx_desc->upper.data = cpu_to_le32(txd_upper); |
|
2845 if (unlikely(++i == tx_ring->count)) i = 0; |
|
2846 } |
|
2847 |
|
2848 tx_desc->lower.data |= cpu_to_le32(adapter->txd_cmd); |
|
2849 |
|
2850 /* Force memory writes to complete before letting h/w |
|
2851 * know there are new descriptors to fetch. (Only |
|
2852 * applicable for weak-ordered memory model archs, |
|
2853 * such as IA-64). */ |
|
2854 wmb(); |
|
2855 |
|
2856 tx_ring->next_to_use = i; |
|
2857 writel(i, hw->hw_addr + tx_ring->tdt); |
|
2858 /* we need this if more than one processor can write to our tail |
|
2859 * at a time, it syncronizes IO on IA64/Altix systems */ |
|
2860 mmiowb(); |
|
2861 } |
|
2862 |
|
2863 /** |
|
2864 * 82547 workaround to avoid controller hang in half-duplex environment. |
|
2865 * The workaround is to avoid queuing a large packet that would span |
|
2866 * the internal Tx FIFO ring boundary by notifying the stack to resend |
|
2867 * the packet at a later time. This gives the Tx FIFO an opportunity to |
|
2868 * flush all packets. When that occurs, we reset the Tx FIFO pointers |
|
2869 * to the beginning of the Tx FIFO. |
|
2870 **/ |
|
2871 |
|
2872 #define E1000_FIFO_HDR 0x10 |
|
2873 #define E1000_82547_PAD_LEN 0x3E0 |
|
2874 |
|
2875 static int e1000_82547_fifo_workaround(struct e1000_adapter *adapter, |
|
2876 struct sk_buff *skb) |
|
2877 { |
|
2878 u32 fifo_space = adapter->tx_fifo_size - adapter->tx_fifo_head; |
|
2879 u32 skb_fifo_len = skb->len + E1000_FIFO_HDR; |
|
2880 |
|
2881 skb_fifo_len = ALIGN(skb_fifo_len, E1000_FIFO_HDR); |
|
2882 |
|
2883 if (adapter->link_duplex != HALF_DUPLEX) |
|
2884 goto no_fifo_stall_required; |
|
2885 |
|
2886 if (atomic_read(&adapter->tx_fifo_stall)) |
|
2887 return 1; |
|
2888 |
|
2889 if (skb_fifo_len >= (E1000_82547_PAD_LEN + fifo_space)) { |
|
2890 atomic_set(&adapter->tx_fifo_stall, 1); |
|
2891 return 1; |
|
2892 } |
|
2893 |
|
2894 no_fifo_stall_required: |
|
2895 adapter->tx_fifo_head += skb_fifo_len; |
|
2896 if (adapter->tx_fifo_head >= adapter->tx_fifo_size) |
|
2897 adapter->tx_fifo_head -= adapter->tx_fifo_size; |
|
2898 return 0; |
|
2899 } |
|
2900 |
|
2901 static int __e1000_maybe_stop_tx(struct net_device *netdev, int size) |
|
2902 { |
|
2903 struct e1000_adapter *adapter = netdev_priv(netdev); |
|
2904 struct e1000_tx_ring *tx_ring = adapter->tx_ring; |
|
2905 |
|
2906 netif_stop_queue(netdev); |
|
2907 /* Herbert's original patch had: |
|
2908 * smp_mb__after_netif_stop_queue(); |
|
2909 * but since that doesn't exist yet, just open code it. */ |
|
2910 smp_mb(); |
|
2911 |
|
2912 /* We need to check again in a case another CPU has just |
|
2913 * made room available. */ |
|
2914 if (likely(E1000_DESC_UNUSED(tx_ring) < size)) |
|
2915 return -EBUSY; |
|
2916 |
|
2917 /* A reprieve! */ |
|
2918 netif_start_queue(netdev); |
|
2919 ++adapter->restart_queue; |
|
2920 return 0; |
|
2921 } |
|
2922 |
|
2923 static int e1000_maybe_stop_tx(struct net_device *netdev, |
|
2924 struct e1000_tx_ring *tx_ring, int size) |
|
2925 { |
|
2926 if (likely(E1000_DESC_UNUSED(tx_ring) >= size)) |
|
2927 return 0; |
|
2928 return __e1000_maybe_stop_tx(netdev, size); |
|
2929 } |
|
2930 |
|
2931 #define TXD_USE_COUNT(S, X) (((S) >> (X)) + 1 ) |
|
2932 static netdev_tx_t e1000_xmit_frame(struct sk_buff *skb, |
|
2933 struct net_device *netdev) |
|
2934 { |
|
2935 struct e1000_adapter *adapter = netdev_priv(netdev); |
|
2936 struct e1000_hw *hw = &adapter->hw; |
|
2937 struct e1000_tx_ring *tx_ring; |
|
2938 unsigned int first, max_per_txd = E1000_MAX_DATA_PER_TXD; |
|
2939 unsigned int max_txd_pwr = E1000_MAX_TXD_PWR; |
|
2940 unsigned int tx_flags = 0; |
|
2941 unsigned int len = skb->len - skb->data_len; |
|
2942 unsigned int nr_frags; |
|
2943 unsigned int mss; |
|
2944 int count = 0; |
|
2945 int tso; |
|
2946 unsigned int f; |
|
2947 |
|
2948 /* This goes back to the question of how to logically map a tx queue |
|
2949 * to a flow. Right now, performance is impacted slightly negatively |
|
2950 * if using multiple tx queues. If the stack breaks away from a |
|
2951 * single qdisc implementation, we can look at this again. */ |
|
2952 tx_ring = adapter->tx_ring; |
|
2953 |
|
2954 if (unlikely(skb->len <= 0)) { |
|
2955 dev_kfree_skb_any(skb); |
|
2956 return NETDEV_TX_OK; |
|
2957 } |
|
2958 |
|
2959 mss = skb_shinfo(skb)->gso_size; |
|
2960 /* The controller does a simple calculation to |
|
2961 * make sure there is enough room in the FIFO before |
|
2962 * initiating the DMA for each buffer. The calc is: |
|
2963 * 4 = ceil(buffer len/mss). To make sure we don't |
|
2964 * overrun the FIFO, adjust the max buffer len if mss |
|
2965 * drops. */ |
|
2966 if (mss) { |
|
2967 u8 hdr_len; |
|
2968 max_per_txd = min(mss << 2, max_per_txd); |
|
2969 max_txd_pwr = fls(max_per_txd) - 1; |
|
2970 |
|
2971 hdr_len = skb_transport_offset(skb) + tcp_hdrlen(skb); |
|
2972 if (skb->data_len && hdr_len == len) { |
|
2973 switch (hw->mac_type) { |
|
2974 unsigned int pull_size; |
|
2975 case e1000_82544: |
|
2976 /* Make sure we have room to chop off 4 bytes, |
|
2977 * and that the end alignment will work out to |
|
2978 * this hardware's requirements |
|
2979 * NOTE: this is a TSO only workaround |
|
2980 * if end byte alignment not correct move us |
|
2981 * into the next dword */ |
|
2982 if ((unsigned long)(skb_tail_pointer(skb) - 1) & 4) |
|
2983 break; |
|
2984 /* fall through */ |
|
2985 pull_size = min((unsigned int)4, skb->data_len); |
|
2986 if (!__pskb_pull_tail(skb, pull_size)) { |
|
2987 DPRINTK(DRV, ERR, |
|
2988 "__pskb_pull_tail failed.\n"); |
|
2989 dev_kfree_skb_any(skb); |
|
2990 return NETDEV_TX_OK; |
|
2991 } |
|
2992 len = skb->len - skb->data_len; |
|
2993 break; |
|
2994 default: |
|
2995 /* do nothing */ |
|
2996 break; |
|
2997 } |
|
2998 } |
|
2999 } |
|
3000 |
|
3001 /* reserve a descriptor for the offload context */ |
|
3002 if ((mss) || (skb->ip_summed == CHECKSUM_PARTIAL)) |
|
3003 count++; |
|
3004 count++; |
|
3005 |
|
3006 /* Controller Erratum workaround */ |
|
3007 if (!skb->data_len && tx_ring->last_tx_tso && !skb_is_gso(skb)) |
|
3008 count++; |
|
3009 |
|
3010 count += TXD_USE_COUNT(len, max_txd_pwr); |
|
3011 |
|
3012 if (adapter->pcix_82544) |
|
3013 count++; |
|
3014 |
|
3015 /* work-around for errata 10 and it applies to all controllers |
|
3016 * in PCI-X mode, so add one more descriptor to the count |
|
3017 */ |
|
3018 if (unlikely((hw->bus_type == e1000_bus_type_pcix) && |
|
3019 (len > 2015))) |
|
3020 count++; |
|
3021 |
|
3022 nr_frags = skb_shinfo(skb)->nr_frags; |
|
3023 for (f = 0; f < nr_frags; f++) |
|
3024 count += TXD_USE_COUNT(skb_shinfo(skb)->frags[f].size, |
|
3025 max_txd_pwr); |
|
3026 if (adapter->pcix_82544) |
|
3027 count += nr_frags; |
|
3028 |
|
3029 /* need: count + 2 desc gap to keep tail from touching |
|
3030 * head, otherwise try next time */ |
|
3031 if (unlikely(e1000_maybe_stop_tx(netdev, tx_ring, count + 2))) |
|
3032 return NETDEV_TX_BUSY; |
|
3033 |
|
3034 if (unlikely(hw->mac_type == e1000_82547)) { |
|
3035 if (unlikely(e1000_82547_fifo_workaround(adapter, skb))) { |
|
3036 netif_stop_queue(netdev); |
|
3037 if (!test_bit(__E1000_DOWN, &adapter->flags)) |
|
3038 mod_timer(&adapter->tx_fifo_stall_timer, |
|
3039 jiffies + 1); |
|
3040 return NETDEV_TX_BUSY; |
|
3041 } |
|
3042 } |
|
3043 |
|
3044 if (unlikely(adapter->vlgrp && vlan_tx_tag_present(skb))) { |
|
3045 tx_flags |= E1000_TX_FLAGS_VLAN; |
|
3046 tx_flags |= (vlan_tx_tag_get(skb) << E1000_TX_FLAGS_VLAN_SHIFT); |
|
3047 } |
|
3048 |
|
3049 first = tx_ring->next_to_use; |
|
3050 |
|
3051 tso = e1000_tso(adapter, tx_ring, skb); |
|
3052 if (tso < 0) { |
|
3053 dev_kfree_skb_any(skb); |
|
3054 return NETDEV_TX_OK; |
|
3055 } |
|
3056 |
|
3057 if (likely(tso)) { |
|
3058 if (likely(hw->mac_type != e1000_82544)) |
|
3059 tx_ring->last_tx_tso = 1; |
|
3060 tx_flags |= E1000_TX_FLAGS_TSO; |
|
3061 } else if (likely(e1000_tx_csum(adapter, tx_ring, skb))) |
|
3062 tx_flags |= E1000_TX_FLAGS_CSUM; |
|
3063 |
|
3064 if (likely(skb->protocol == htons(ETH_P_IP))) |
|
3065 tx_flags |= E1000_TX_FLAGS_IPV4; |
|
3066 |
|
3067 count = e1000_tx_map(adapter, tx_ring, skb, first, max_per_txd, |
|
3068 nr_frags, mss); |
|
3069 |
|
3070 if (count) { |
|
3071 e1000_tx_queue(adapter, tx_ring, tx_flags, count); |
|
3072 /* Make sure there is space in the ring for the next send. */ |
|
3073 e1000_maybe_stop_tx(netdev, tx_ring, MAX_SKB_FRAGS + 2); |
|
3074 |
|
3075 } else { |
|
3076 dev_kfree_skb_any(skb); |
|
3077 tx_ring->buffer_info[first].time_stamp = 0; |
|
3078 tx_ring->next_to_use = first; |
|
3079 } |
|
3080 |
|
3081 return NETDEV_TX_OK; |
|
3082 } |
|
3083 |
|
3084 /** |
|
3085 * e1000_tx_timeout - Respond to a Tx Hang |
|
3086 * @netdev: network interface device structure |
|
3087 **/ |
|
3088 |
|
3089 static void e1000_tx_timeout(struct net_device *netdev) |
|
3090 { |
|
3091 struct e1000_adapter *adapter = netdev_priv(netdev); |
|
3092 |
|
3093 /* Do the reset outside of interrupt context */ |
|
3094 adapter->tx_timeout_count++; |
|
3095 schedule_work(&adapter->reset_task); |
|
3096 } |
|
3097 |
|
3098 static void e1000_reset_task(struct work_struct *work) |
|
3099 { |
|
3100 struct e1000_adapter *adapter = |
|
3101 container_of(work, struct e1000_adapter, reset_task); |
|
3102 |
|
3103 e1000_reinit_locked(adapter); |
|
3104 } |
|
3105 |
|
3106 /** |
|
3107 * e1000_get_stats - Get System Network Statistics |
|
3108 * @netdev: network interface device structure |
|
3109 * |
|
3110 * Returns the address of the device statistics structure. |
|
3111 * The statistics are actually updated from the timer callback. |
|
3112 **/ |
|
3113 |
|
3114 static struct net_device_stats *e1000_get_stats(struct net_device *netdev) |
|
3115 { |
|
3116 /* only return the current stats */ |
|
3117 return &netdev->stats; |
|
3118 } |
|
3119 |
|
3120 /** |
|
3121 * e1000_change_mtu - Change the Maximum Transfer Unit |
|
3122 * @netdev: network interface device structure |
|
3123 * @new_mtu: new value for maximum frame size |
|
3124 * |
|
3125 * Returns 0 on success, negative on failure |
|
3126 **/ |
|
3127 |
|
3128 static int e1000_change_mtu(struct net_device *netdev, int new_mtu) |
|
3129 { |
|
3130 struct e1000_adapter *adapter = netdev_priv(netdev); |
|
3131 struct e1000_hw *hw = &adapter->hw; |
|
3132 int max_frame = new_mtu + ENET_HEADER_SIZE + ETHERNET_FCS_SIZE; |
|
3133 |
|
3134 if ((max_frame < MINIMUM_ETHERNET_FRAME_SIZE) || |
|
3135 (max_frame > MAX_JUMBO_FRAME_SIZE)) { |
|
3136 DPRINTK(PROBE, ERR, "Invalid MTU setting\n"); |
|
3137 return -EINVAL; |
|
3138 } |
|
3139 |
|
3140 /* Adapter-specific max frame size limits. */ |
|
3141 switch (hw->mac_type) { |
|
3142 case e1000_undefined ... e1000_82542_rev2_1: |
|
3143 if (max_frame > (ETH_FRAME_LEN + ETH_FCS_LEN)) { |
|
3144 DPRINTK(PROBE, ERR, "Jumbo Frames not supported.\n"); |
|
3145 return -EINVAL; |
|
3146 } |
|
3147 break; |
|
3148 default: |
|
3149 /* Capable of supporting up to MAX_JUMBO_FRAME_SIZE limit. */ |
|
3150 break; |
|
3151 } |
|
3152 |
|
3153 while (test_and_set_bit(__E1000_RESETTING, &adapter->flags)) |
|
3154 msleep(1); |
|
3155 /* e1000_down has a dependency on max_frame_size */ |
|
3156 hw->max_frame_size = max_frame; |
|
3157 if (netif_running(netdev)) |
|
3158 e1000_down(adapter); |
|
3159 |
|
3160 /* NOTE: netdev_alloc_skb reserves 16 bytes, and typically NET_IP_ALIGN |
|
3161 * means we reserve 2 more, this pushes us to allocate from the next |
|
3162 * larger slab size. |
|
3163 * i.e. RXBUFFER_2048 --> size-4096 slab |
|
3164 * however with the new *_jumbo_rx* routines, jumbo receives will use |
|
3165 * fragmented skbs */ |
|
3166 |
|
3167 if (max_frame <= E1000_RXBUFFER_2048) |
|
3168 adapter->rx_buffer_len = E1000_RXBUFFER_2048; |
|
3169 else |
|
3170 #if (PAGE_SIZE >= E1000_RXBUFFER_16384) |
|
3171 adapter->rx_buffer_len = E1000_RXBUFFER_16384; |
|
3172 #elif (PAGE_SIZE >= E1000_RXBUFFER_4096) |
|
3173 adapter->rx_buffer_len = PAGE_SIZE; |
|
3174 #endif |
|
3175 |
|
3176 /* adjust allocation if LPE protects us, and we aren't using SBP */ |
|
3177 if (!hw->tbi_compatibility_on && |
|
3178 ((max_frame == (ETH_FRAME_LEN + ETH_FCS_LEN)) || |
|
3179 (max_frame == MAXIMUM_ETHERNET_VLAN_SIZE))) |
|
3180 adapter->rx_buffer_len = MAXIMUM_ETHERNET_VLAN_SIZE; |
|
3181 |
|
3182 printk(KERN_INFO "e1000: %s changing MTU from %d to %d\n", |
|
3183 netdev->name, netdev->mtu, new_mtu); |
|
3184 netdev->mtu = new_mtu; |
|
3185 |
|
3186 if (netif_running(netdev)) |
|
3187 e1000_up(adapter); |
|
3188 else |
|
3189 e1000_reset(adapter); |
|
3190 |
|
3191 clear_bit(__E1000_RESETTING, &adapter->flags); |
|
3192 |
|
3193 return 0; |
|
3194 } |
|
3195 |
|
3196 /** |
|
3197 * e1000_update_stats - Update the board statistics counters |
|
3198 * @adapter: board private structure |
|
3199 **/ |
|
3200 |
|
3201 void e1000_update_stats(struct e1000_adapter *adapter) |
|
3202 { |
|
3203 struct net_device *netdev = adapter->netdev; |
|
3204 struct e1000_hw *hw = &adapter->hw; |
|
3205 struct pci_dev *pdev = adapter->pdev; |
|
3206 unsigned long flags; |
|
3207 u16 phy_tmp; |
|
3208 |
|
3209 #define PHY_IDLE_ERROR_COUNT_MASK 0x00FF |
|
3210 |
|
3211 /* |
|
3212 * Prevent stats update while adapter is being reset, or if the pci |
|
3213 * connection is down. |
|
3214 */ |
|
3215 if (adapter->link_speed == 0) |
|
3216 return; |
|
3217 if (pci_channel_offline(pdev)) |
|
3218 return; |
|
3219 |
|
3220 spin_lock_irqsave(&adapter->stats_lock, flags); |
|
3221 |
|
3222 /* these counters are modified from e1000_tbi_adjust_stats, |
|
3223 * called from the interrupt context, so they must only |
|
3224 * be written while holding adapter->stats_lock |
|
3225 */ |
|
3226 |
|
3227 adapter->stats.crcerrs += er32(CRCERRS); |
|
3228 adapter->stats.gprc += er32(GPRC); |
|
3229 adapter->stats.gorcl += er32(GORCL); |
|
3230 adapter->stats.gorch += er32(GORCH); |
|
3231 adapter->stats.bprc += er32(BPRC); |
|
3232 adapter->stats.mprc += er32(MPRC); |
|
3233 adapter->stats.roc += er32(ROC); |
|
3234 |
|
3235 adapter->stats.prc64 += er32(PRC64); |
|
3236 adapter->stats.prc127 += er32(PRC127); |
|
3237 adapter->stats.prc255 += er32(PRC255); |
|
3238 adapter->stats.prc511 += er32(PRC511); |
|
3239 adapter->stats.prc1023 += er32(PRC1023); |
|
3240 adapter->stats.prc1522 += er32(PRC1522); |
|
3241 |
|
3242 adapter->stats.symerrs += er32(SYMERRS); |
|
3243 adapter->stats.mpc += er32(MPC); |
|
3244 adapter->stats.scc += er32(SCC); |
|
3245 adapter->stats.ecol += er32(ECOL); |
|
3246 adapter->stats.mcc += er32(MCC); |
|
3247 adapter->stats.latecol += er32(LATECOL); |
|
3248 adapter->stats.dc += er32(DC); |
|
3249 adapter->stats.sec += er32(SEC); |
|
3250 adapter->stats.rlec += er32(RLEC); |
|
3251 adapter->stats.xonrxc += er32(XONRXC); |
|
3252 adapter->stats.xontxc += er32(XONTXC); |
|
3253 adapter->stats.xoffrxc += er32(XOFFRXC); |
|
3254 adapter->stats.xofftxc += er32(XOFFTXC); |
|
3255 adapter->stats.fcruc += er32(FCRUC); |
|
3256 adapter->stats.gptc += er32(GPTC); |
|
3257 adapter->stats.gotcl += er32(GOTCL); |
|
3258 adapter->stats.gotch += er32(GOTCH); |
|
3259 adapter->stats.rnbc += er32(RNBC); |
|
3260 adapter->stats.ruc += er32(RUC); |
|
3261 adapter->stats.rfc += er32(RFC); |
|
3262 adapter->stats.rjc += er32(RJC); |
|
3263 adapter->stats.torl += er32(TORL); |
|
3264 adapter->stats.torh += er32(TORH); |
|
3265 adapter->stats.totl += er32(TOTL); |
|
3266 adapter->stats.toth += er32(TOTH); |
|
3267 adapter->stats.tpr += er32(TPR); |
|
3268 |
|
3269 adapter->stats.ptc64 += er32(PTC64); |
|
3270 adapter->stats.ptc127 += er32(PTC127); |
|
3271 adapter->stats.ptc255 += er32(PTC255); |
|
3272 adapter->stats.ptc511 += er32(PTC511); |
|
3273 adapter->stats.ptc1023 += er32(PTC1023); |
|
3274 adapter->stats.ptc1522 += er32(PTC1522); |
|
3275 |
|
3276 adapter->stats.mptc += er32(MPTC); |
|
3277 adapter->stats.bptc += er32(BPTC); |
|
3278 |
|
3279 /* used for adaptive IFS */ |
|
3280 |
|
3281 hw->tx_packet_delta = er32(TPT); |
|
3282 adapter->stats.tpt += hw->tx_packet_delta; |
|
3283 hw->collision_delta = er32(COLC); |
|
3284 adapter->stats.colc += hw->collision_delta; |
|
3285 |
|
3286 if (hw->mac_type >= e1000_82543) { |
|
3287 adapter->stats.algnerrc += er32(ALGNERRC); |
|
3288 adapter->stats.rxerrc += er32(RXERRC); |
|
3289 adapter->stats.tncrs += er32(TNCRS); |
|
3290 adapter->stats.cexterr += er32(CEXTERR); |
|
3291 adapter->stats.tsctc += er32(TSCTC); |
|
3292 adapter->stats.tsctfc += er32(TSCTFC); |
|
3293 } |
|
3294 |
|
3295 /* Fill out the OS statistics structure */ |
|
3296 netdev->stats.multicast = adapter->stats.mprc; |
|
3297 netdev->stats.collisions = adapter->stats.colc; |
|
3298 |
|
3299 /* Rx Errors */ |
|
3300 |
|
3301 /* RLEC on some newer hardware can be incorrect so build |
|
3302 * our own version based on RUC and ROC */ |
|
3303 netdev->stats.rx_errors = adapter->stats.rxerrc + |
|
3304 adapter->stats.crcerrs + adapter->stats.algnerrc + |
|
3305 adapter->stats.ruc + adapter->stats.roc + |
|
3306 adapter->stats.cexterr; |
|
3307 adapter->stats.rlerrc = adapter->stats.ruc + adapter->stats.roc; |
|
3308 netdev->stats.rx_length_errors = adapter->stats.rlerrc; |
|
3309 netdev->stats.rx_crc_errors = adapter->stats.crcerrs; |
|
3310 netdev->stats.rx_frame_errors = adapter->stats.algnerrc; |
|
3311 netdev->stats.rx_missed_errors = adapter->stats.mpc; |
|
3312 |
|
3313 /* Tx Errors */ |
|
3314 adapter->stats.txerrc = adapter->stats.ecol + adapter->stats.latecol; |
|
3315 netdev->stats.tx_errors = adapter->stats.txerrc; |
|
3316 netdev->stats.tx_aborted_errors = adapter->stats.ecol; |
|
3317 netdev->stats.tx_window_errors = adapter->stats.latecol; |
|
3318 netdev->stats.tx_carrier_errors = adapter->stats.tncrs; |
|
3319 if (hw->bad_tx_carr_stats_fd && |
|
3320 adapter->link_duplex == FULL_DUPLEX) { |
|
3321 netdev->stats.tx_carrier_errors = 0; |
|
3322 adapter->stats.tncrs = 0; |
|
3323 } |
|
3324 |
|
3325 /* Tx Dropped needs to be maintained elsewhere */ |
|
3326 |
|
3327 /* Phy Stats */ |
|
3328 if (hw->media_type == e1000_media_type_copper) { |
|
3329 if ((adapter->link_speed == SPEED_1000) && |
|
3330 (!e1000_read_phy_reg(hw, PHY_1000T_STATUS, &phy_tmp))) { |
|
3331 phy_tmp &= PHY_IDLE_ERROR_COUNT_MASK; |
|
3332 adapter->phy_stats.idle_errors += phy_tmp; |
|
3333 } |
|
3334 |
|
3335 if ((hw->mac_type <= e1000_82546) && |
|
3336 (hw->phy_type == e1000_phy_m88) && |
|
3337 !e1000_read_phy_reg(hw, M88E1000_RX_ERR_CNTR, &phy_tmp)) |
|
3338 adapter->phy_stats.receive_errors += phy_tmp; |
|
3339 } |
|
3340 |
|
3341 /* Management Stats */ |
|
3342 if (hw->has_smbus) { |
|
3343 adapter->stats.mgptc += er32(MGTPTC); |
|
3344 adapter->stats.mgprc += er32(MGTPRC); |
|
3345 adapter->stats.mgpdc += er32(MGTPDC); |
|
3346 } |
|
3347 |
|
3348 spin_unlock_irqrestore(&adapter->stats_lock, flags); |
|
3349 } |
|
3350 |
|
3351 /** |
|
3352 * e1000_intr - Interrupt Handler |
|
3353 * @irq: interrupt number |
|
3354 * @data: pointer to a network interface device structure |
|
3355 **/ |
|
3356 |
|
3357 static irqreturn_t e1000_intr(int irq, void *data) |
|
3358 { |
|
3359 struct net_device *netdev = data; |
|
3360 struct e1000_adapter *adapter = netdev_priv(netdev); |
|
3361 struct e1000_hw *hw = &adapter->hw; |
|
3362 u32 icr = er32(ICR); |
|
3363 |
|
3364 if (unlikely((!icr) || test_bit(__E1000_DOWN, &adapter->flags))) |
|
3365 return IRQ_NONE; /* Not our interrupt */ |
|
3366 |
|
3367 if (unlikely(icr & (E1000_ICR_RXSEQ | E1000_ICR_LSC))) { |
|
3368 hw->get_link_status = 1; |
|
3369 /* guard against interrupt when we're going down */ |
|
3370 if (!test_bit(__E1000_DOWN, &adapter->flags)) |
|
3371 mod_timer(&adapter->watchdog_timer, jiffies + 1); |
|
3372 } |
|
3373 |
|
3374 /* disable interrupts, without the synchronize_irq bit */ |
|
3375 ew32(IMC, ~0); |
|
3376 E1000_WRITE_FLUSH(); |
|
3377 |
|
3378 if (likely(napi_schedule_prep(&adapter->napi))) { |
|
3379 adapter->total_tx_bytes = 0; |
|
3380 adapter->total_tx_packets = 0; |
|
3381 adapter->total_rx_bytes = 0; |
|
3382 adapter->total_rx_packets = 0; |
|
3383 __napi_schedule(&adapter->napi); |
|
3384 } else { |
|
3385 /* this really should not happen! if it does it is basically a |
|
3386 * bug, but not a hard error, so enable ints and continue */ |
|
3387 if (!test_bit(__E1000_DOWN, &adapter->flags)) |
|
3388 e1000_irq_enable(adapter); |
|
3389 } |
|
3390 |
|
3391 return IRQ_HANDLED; |
|
3392 } |
|
3393 |
|
3394 /** |
|
3395 * e1000_clean - NAPI Rx polling callback |
|
3396 * @adapter: board private structure |
|
3397 **/ |
|
3398 static int e1000_clean(struct napi_struct *napi, int budget) |
|
3399 { |
|
3400 struct e1000_adapter *adapter = container_of(napi, struct e1000_adapter, napi); |
|
3401 int tx_clean_complete = 0, work_done = 0; |
|
3402 |
|
3403 tx_clean_complete = e1000_clean_tx_irq(adapter, &adapter->tx_ring[0]); |
|
3404 |
|
3405 adapter->clean_rx(adapter, &adapter->rx_ring[0], &work_done, budget); |
|
3406 |
|
3407 if (!tx_clean_complete) |
|
3408 work_done = budget; |
|
3409 |
|
3410 /* If budget not fully consumed, exit the polling mode */ |
|
3411 if (work_done < budget) { |
|
3412 if (likely(adapter->itr_setting & 3)) |
|
3413 e1000_set_itr(adapter); |
|
3414 napi_complete(napi); |
|
3415 if (!test_bit(__E1000_DOWN, &adapter->flags)) |
|
3416 e1000_irq_enable(adapter); |
|
3417 } |
|
3418 |
|
3419 return work_done; |
|
3420 } |
|
3421 |
|
3422 /** |
|
3423 * e1000_clean_tx_irq - Reclaim resources after transmit completes |
|
3424 * @adapter: board private structure |
|
3425 **/ |
|
3426 static bool e1000_clean_tx_irq(struct e1000_adapter *adapter, |
|
3427 struct e1000_tx_ring *tx_ring) |
|
3428 { |
|
3429 struct e1000_hw *hw = &adapter->hw; |
|
3430 struct net_device *netdev = adapter->netdev; |
|
3431 struct e1000_tx_desc *tx_desc, *eop_desc; |
|
3432 struct e1000_buffer *buffer_info; |
|
3433 unsigned int i, eop; |
|
3434 unsigned int count = 0; |
|
3435 unsigned int total_tx_bytes=0, total_tx_packets=0; |
|
3436 |
|
3437 i = tx_ring->next_to_clean; |
|
3438 eop = tx_ring->buffer_info[i].next_to_watch; |
|
3439 eop_desc = E1000_TX_DESC(*tx_ring, eop); |
|
3440 |
|
3441 while ((eop_desc->upper.data & cpu_to_le32(E1000_TXD_STAT_DD)) && |
|
3442 (count < tx_ring->count)) { |
|
3443 bool cleaned = false; |
|
3444 for ( ; !cleaned; count++) { |
|
3445 tx_desc = E1000_TX_DESC(*tx_ring, i); |
|
3446 buffer_info = &tx_ring->buffer_info[i]; |
|
3447 cleaned = (i == eop); |
|
3448 |
|
3449 if (cleaned) { |
|
3450 struct sk_buff *skb = buffer_info->skb; |
|
3451 unsigned int segs, bytecount; |
|
3452 segs = skb_shinfo(skb)->gso_segs ?: 1; |
|
3453 /* multiply data chunks by size of headers */ |
|
3454 bytecount = ((segs - 1) * skb_headlen(skb)) + |
|
3455 skb->len; |
|
3456 total_tx_packets += segs; |
|
3457 total_tx_bytes += bytecount; |
|
3458 } |
|
3459 e1000_unmap_and_free_tx_resource(adapter, buffer_info); |
|
3460 tx_desc->upper.data = 0; |
|
3461 |
|
3462 if (unlikely(++i == tx_ring->count)) i = 0; |
|
3463 } |
|
3464 |
|
3465 eop = tx_ring->buffer_info[i].next_to_watch; |
|
3466 eop_desc = E1000_TX_DESC(*tx_ring, eop); |
|
3467 } |
|
3468 |
|
3469 tx_ring->next_to_clean = i; |
|
3470 |
|
3471 #define TX_WAKE_THRESHOLD 32 |
|
3472 if (unlikely(count && netif_carrier_ok(netdev) && |
|
3473 E1000_DESC_UNUSED(tx_ring) >= TX_WAKE_THRESHOLD)) { |
|
3474 /* Make sure that anybody stopping the queue after this |
|
3475 * sees the new next_to_clean. |
|
3476 */ |
|
3477 smp_mb(); |
|
3478 |
|
3479 if (netif_queue_stopped(netdev) && |
|
3480 !(test_bit(__E1000_DOWN, &adapter->flags))) { |
|
3481 netif_wake_queue(netdev); |
|
3482 ++adapter->restart_queue; |
|
3483 } |
|
3484 } |
|
3485 |
|
3486 if (adapter->detect_tx_hung) { |
|
3487 /* Detect a transmit hang in hardware, this serializes the |
|
3488 * check with the clearing of time_stamp and movement of i */ |
|
3489 adapter->detect_tx_hung = false; |
|
3490 if (tx_ring->buffer_info[eop].time_stamp && |
|
3491 time_after(jiffies, tx_ring->buffer_info[eop].time_stamp + |
|
3492 (adapter->tx_timeout_factor * HZ)) && |
|
3493 !(er32(STATUS) & E1000_STATUS_TXOFF)) { |
|
3494 |
|
3495 /* detected Tx unit hang */ |
|
3496 DPRINTK(DRV, ERR, "Detected Tx Unit Hang\n" |
|
3497 " Tx Queue <%lu>\n" |
|
3498 " TDH <%x>\n" |
|
3499 " TDT <%x>\n" |
|
3500 " next_to_use <%x>\n" |
|
3501 " next_to_clean <%x>\n" |
|
3502 "buffer_info[next_to_clean]\n" |
|
3503 " time_stamp <%lx>\n" |
|
3504 " next_to_watch <%x>\n" |
|
3505 " jiffies <%lx>\n" |
|
3506 " next_to_watch.status <%x>\n", |
|
3507 (unsigned long)((tx_ring - adapter->tx_ring) / |
|
3508 sizeof(struct e1000_tx_ring)), |
|
3509 readl(hw->hw_addr + tx_ring->tdh), |
|
3510 readl(hw->hw_addr + tx_ring->tdt), |
|
3511 tx_ring->next_to_use, |
|
3512 tx_ring->next_to_clean, |
|
3513 tx_ring->buffer_info[eop].time_stamp, |
|
3514 eop, |
|
3515 jiffies, |
|
3516 eop_desc->upper.fields.status); |
|
3517 netif_stop_queue(netdev); |
|
3518 } |
|
3519 } |
|
3520 adapter->total_tx_bytes += total_tx_bytes; |
|
3521 adapter->total_tx_packets += total_tx_packets; |
|
3522 netdev->stats.tx_bytes += total_tx_bytes; |
|
3523 netdev->stats.tx_packets += total_tx_packets; |
|
3524 return (count < tx_ring->count); |
|
3525 } |
|
3526 |
|
3527 /** |
|
3528 * e1000_rx_checksum - Receive Checksum Offload for 82543 |
|
3529 * @adapter: board private structure |
|
3530 * @status_err: receive descriptor status and error fields |
|
3531 * @csum: receive descriptor csum field |
|
3532 * @sk_buff: socket buffer with received data |
|
3533 **/ |
|
3534 |
|
3535 static void e1000_rx_checksum(struct e1000_adapter *adapter, u32 status_err, |
|
3536 u32 csum, struct sk_buff *skb) |
|
3537 { |
|
3538 struct e1000_hw *hw = &adapter->hw; |
|
3539 u16 status = (u16)status_err; |
|
3540 u8 errors = (u8)(status_err >> 24); |
|
3541 skb->ip_summed = CHECKSUM_NONE; |
|
3542 |
|
3543 /* 82543 or newer only */ |
|
3544 if (unlikely(hw->mac_type < e1000_82543)) return; |
|
3545 /* Ignore Checksum bit is set */ |
|
3546 if (unlikely(status & E1000_RXD_STAT_IXSM)) return; |
|
3547 /* TCP/UDP checksum error bit is set */ |
|
3548 if (unlikely(errors & E1000_RXD_ERR_TCPE)) { |
|
3549 /* let the stack verify checksum errors */ |
|
3550 adapter->hw_csum_err++; |
|
3551 return; |
|
3552 } |
|
3553 /* TCP/UDP Checksum has not been calculated */ |
|
3554 if (!(status & E1000_RXD_STAT_TCPCS)) |
|
3555 return; |
|
3556 |
|
3557 /* It must be a TCP or UDP packet with a valid checksum */ |
|
3558 if (likely(status & E1000_RXD_STAT_TCPCS)) { |
|
3559 /* TCP checksum is good */ |
|
3560 skb->ip_summed = CHECKSUM_UNNECESSARY; |
|
3561 } |
|
3562 adapter->hw_csum_good++; |
|
3563 } |
|
3564 |
|
3565 /** |
|
3566 * e1000_consume_page - helper function |
|
3567 **/ |
|
3568 static void e1000_consume_page(struct e1000_buffer *bi, struct sk_buff *skb, |
|
3569 u16 length) |
|
3570 { |
|
3571 bi->page = NULL; |
|
3572 skb->len += length; |
|
3573 skb->data_len += length; |
|
3574 skb->truesize += length; |
|
3575 } |
|
3576 |
|
3577 /** |
|
3578 * e1000_receive_skb - helper function to handle rx indications |
|
3579 * @adapter: board private structure |
|
3580 * @status: descriptor status field as written by hardware |
|
3581 * @vlan: descriptor vlan field as written by hardware (no le/be conversion) |
|
3582 * @skb: pointer to sk_buff to be indicated to stack |
|
3583 */ |
|
3584 static void e1000_receive_skb(struct e1000_adapter *adapter, u8 status, |
|
3585 __le16 vlan, struct sk_buff *skb) |
|
3586 { |
|
3587 if (unlikely(adapter->vlgrp && (status & E1000_RXD_STAT_VP))) { |
|
3588 vlan_hwaccel_receive_skb(skb, adapter->vlgrp, |
|
3589 le16_to_cpu(vlan) & |
|
3590 E1000_RXD_SPC_VLAN_MASK); |
|
3591 } else { |
|
3592 netif_receive_skb(skb); |
|
3593 } |
|
3594 } |
|
3595 |
|
3596 /** |
|
3597 * e1000_clean_jumbo_rx_irq - Send received data up the network stack; legacy |
|
3598 * @adapter: board private structure |
|
3599 * @rx_ring: ring to clean |
|
3600 * @work_done: amount of napi work completed this call |
|
3601 * @work_to_do: max amount of work allowed for this call to do |
|
3602 * |
|
3603 * the return value indicates whether actual cleaning was done, there |
|
3604 * is no guarantee that everything was cleaned |
|
3605 */ |
|
3606 static bool e1000_clean_jumbo_rx_irq(struct e1000_adapter *adapter, |
|
3607 struct e1000_rx_ring *rx_ring, |
|
3608 int *work_done, int work_to_do) |
|
3609 { |
|
3610 struct e1000_hw *hw = &adapter->hw; |
|
3611 struct net_device *netdev = adapter->netdev; |
|
3612 struct pci_dev *pdev = adapter->pdev; |
|
3613 struct e1000_rx_desc *rx_desc, *next_rxd; |
|
3614 struct e1000_buffer *buffer_info, *next_buffer; |
|
3615 unsigned long irq_flags; |
|
3616 u32 length; |
|
3617 unsigned int i; |
|
3618 int cleaned_count = 0; |
|
3619 bool cleaned = false; |
|
3620 unsigned int total_rx_bytes=0, total_rx_packets=0; |
|
3621 |
|
3622 i = rx_ring->next_to_clean; |
|
3623 rx_desc = E1000_RX_DESC(*rx_ring, i); |
|
3624 buffer_info = &rx_ring->buffer_info[i]; |
|
3625 |
|
3626 while (rx_desc->status & E1000_RXD_STAT_DD) { |
|
3627 struct sk_buff *skb; |
|
3628 u8 status; |
|
3629 |
|
3630 if (*work_done >= work_to_do) |
|
3631 break; |
|
3632 (*work_done)++; |
|
3633 |
|
3634 status = rx_desc->status; |
|
3635 skb = buffer_info->skb; |
|
3636 buffer_info->skb = NULL; |
|
3637 |
|
3638 if (++i == rx_ring->count) i = 0; |
|
3639 next_rxd = E1000_RX_DESC(*rx_ring, i); |
|
3640 prefetch(next_rxd); |
|
3641 |
|
3642 next_buffer = &rx_ring->buffer_info[i]; |
|
3643 |
|
3644 cleaned = true; |
|
3645 cleaned_count++; |
|
3646 pci_unmap_page(pdev, buffer_info->dma, buffer_info->length, |
|
3647 PCI_DMA_FROMDEVICE); |
|
3648 buffer_info->dma = 0; |
|
3649 |
|
3650 length = le16_to_cpu(rx_desc->length); |
|
3651 |
|
3652 /* errors is only valid for DD + EOP descriptors */ |
|
3653 if (unlikely((status & E1000_RXD_STAT_EOP) && |
|
3654 (rx_desc->errors & E1000_RXD_ERR_FRAME_ERR_MASK))) { |
|
3655 u8 last_byte = *(skb->data + length - 1); |
|
3656 if (TBI_ACCEPT(hw, status, rx_desc->errors, length, |
|
3657 last_byte)) { |
|
3658 spin_lock_irqsave(&adapter->stats_lock, |
|
3659 irq_flags); |
|
3660 e1000_tbi_adjust_stats(hw, &adapter->stats, |
|
3661 length, skb->data); |
|
3662 spin_unlock_irqrestore(&adapter->stats_lock, |
|
3663 irq_flags); |
|
3664 length--; |
|
3665 } else { |
|
3666 /* recycle both page and skb */ |
|
3667 buffer_info->skb = skb; |
|
3668 /* an error means any chain goes out the window |
|
3669 * too */ |
|
3670 if (rx_ring->rx_skb_top) |
|
3671 dev_kfree_skb(rx_ring->rx_skb_top); |
|
3672 rx_ring->rx_skb_top = NULL; |
|
3673 goto next_desc; |
|
3674 } |
|
3675 } |
|
3676 |
|
3677 #define rxtop rx_ring->rx_skb_top |
|
3678 if (!(status & E1000_RXD_STAT_EOP)) { |
|
3679 /* this descriptor is only the beginning (or middle) */ |
|
3680 if (!rxtop) { |
|
3681 /* this is the beginning of a chain */ |
|
3682 rxtop = skb; |
|
3683 skb_fill_page_desc(rxtop, 0, buffer_info->page, |
|
3684 0, length); |
|
3685 } else { |
|
3686 /* this is the middle of a chain */ |
|
3687 skb_fill_page_desc(rxtop, |
|
3688 skb_shinfo(rxtop)->nr_frags, |
|
3689 buffer_info->page, 0, length); |
|
3690 /* re-use the skb, only consumed the page */ |
|
3691 buffer_info->skb = skb; |
|
3692 } |
|
3693 e1000_consume_page(buffer_info, rxtop, length); |
|
3694 goto next_desc; |
|
3695 } else { |
|
3696 if (rxtop) { |
|
3697 /* end of the chain */ |
|
3698 skb_fill_page_desc(rxtop, |
|
3699 skb_shinfo(rxtop)->nr_frags, |
|
3700 buffer_info->page, 0, length); |
|
3701 /* re-use the current skb, we only consumed the |
|
3702 * page */ |
|
3703 buffer_info->skb = skb; |
|
3704 skb = rxtop; |
|
3705 rxtop = NULL; |
|
3706 e1000_consume_page(buffer_info, skb, length); |
|
3707 } else { |
|
3708 /* no chain, got EOP, this buf is the packet |
|
3709 * copybreak to save the put_page/alloc_page */ |
|
3710 if (length <= copybreak && |
|
3711 skb_tailroom(skb) >= length) { |
|
3712 u8 *vaddr; |
|
3713 vaddr = kmap_atomic(buffer_info->page, |
|
3714 KM_SKB_DATA_SOFTIRQ); |
|
3715 memcpy(skb_tail_pointer(skb), vaddr, length); |
|
3716 kunmap_atomic(vaddr, |
|
3717 KM_SKB_DATA_SOFTIRQ); |
|
3718 /* re-use the page, so don't erase |
|
3719 * buffer_info->page */ |
|
3720 skb_put(skb, length); |
|
3721 } else { |
|
3722 skb_fill_page_desc(skb, 0, |
|
3723 buffer_info->page, 0, |
|
3724 length); |
|
3725 e1000_consume_page(buffer_info, skb, |
|
3726 length); |
|
3727 } |
|
3728 } |
|
3729 } |
|
3730 |
|
3731 /* Receive Checksum Offload XXX recompute due to CRC strip? */ |
|
3732 e1000_rx_checksum(adapter, |
|
3733 (u32)(status) | |
|
3734 ((u32)(rx_desc->errors) << 24), |
|
3735 le16_to_cpu(rx_desc->csum), skb); |
|
3736 |
|
3737 pskb_trim(skb, skb->len - 4); |
|
3738 |
|
3739 /* probably a little skewed due to removing CRC */ |
|
3740 total_rx_bytes += skb->len; |
|
3741 total_rx_packets++; |
|
3742 |
|
3743 /* eth type trans needs skb->data to point to something */ |
|
3744 if (!pskb_may_pull(skb, ETH_HLEN)) { |
|
3745 DPRINTK(DRV, ERR, "pskb_may_pull failed.\n"); |
|
3746 dev_kfree_skb(skb); |
|
3747 goto next_desc; |
|
3748 } |
|
3749 |
|
3750 skb->protocol = eth_type_trans(skb, netdev); |
|
3751 |
|
3752 e1000_receive_skb(adapter, status, rx_desc->special, skb); |
|
3753 |
|
3754 next_desc: |
|
3755 rx_desc->status = 0; |
|
3756 |
|
3757 /* return some buffers to hardware, one at a time is too slow */ |
|
3758 if (unlikely(cleaned_count >= E1000_RX_BUFFER_WRITE)) { |
|
3759 adapter->alloc_rx_buf(adapter, rx_ring, cleaned_count); |
|
3760 cleaned_count = 0; |
|
3761 } |
|
3762 |
|
3763 /* use prefetched values */ |
|
3764 rx_desc = next_rxd; |
|
3765 buffer_info = next_buffer; |
|
3766 } |
|
3767 rx_ring->next_to_clean = i; |
|
3768 |
|
3769 cleaned_count = E1000_DESC_UNUSED(rx_ring); |
|
3770 if (cleaned_count) |
|
3771 adapter->alloc_rx_buf(adapter, rx_ring, cleaned_count); |
|
3772 |
|
3773 adapter->total_rx_packets += total_rx_packets; |
|
3774 adapter->total_rx_bytes += total_rx_bytes; |
|
3775 netdev->stats.rx_bytes += total_rx_bytes; |
|
3776 netdev->stats.rx_packets += total_rx_packets; |
|
3777 return cleaned; |
|
3778 } |
|
3779 |
|
3780 /** |
|
3781 * e1000_clean_rx_irq - Send received data up the network stack; legacy |
|
3782 * @adapter: board private structure |
|
3783 * @rx_ring: ring to clean |
|
3784 * @work_done: amount of napi work completed this call |
|
3785 * @work_to_do: max amount of work allowed for this call to do |
|
3786 */ |
|
3787 static bool e1000_clean_rx_irq(struct e1000_adapter *adapter, |
|
3788 struct e1000_rx_ring *rx_ring, |
|
3789 int *work_done, int work_to_do) |
|
3790 { |
|
3791 struct e1000_hw *hw = &adapter->hw; |
|
3792 struct net_device *netdev = adapter->netdev; |
|
3793 struct pci_dev *pdev = adapter->pdev; |
|
3794 struct e1000_rx_desc *rx_desc, *next_rxd; |
|
3795 struct e1000_buffer *buffer_info, *next_buffer; |
|
3796 unsigned long flags; |
|
3797 u32 length; |
|
3798 unsigned int i; |
|
3799 int cleaned_count = 0; |
|
3800 bool cleaned = false; |
|
3801 unsigned int total_rx_bytes=0, total_rx_packets=0; |
|
3802 |
|
3803 i = rx_ring->next_to_clean; |
|
3804 rx_desc = E1000_RX_DESC(*rx_ring, i); |
|
3805 buffer_info = &rx_ring->buffer_info[i]; |
|
3806 |
|
3807 while (rx_desc->status & E1000_RXD_STAT_DD) { |
|
3808 struct sk_buff *skb; |
|
3809 u8 status; |
|
3810 |
|
3811 if (*work_done >= work_to_do) |
|
3812 break; |
|
3813 (*work_done)++; |
|
3814 |
|
3815 status = rx_desc->status; |
|
3816 skb = buffer_info->skb; |
|
3817 buffer_info->skb = NULL; |
|
3818 |
|
3819 prefetch(skb->data - NET_IP_ALIGN); |
|
3820 |
|
3821 if (++i == rx_ring->count) i = 0; |
|
3822 next_rxd = E1000_RX_DESC(*rx_ring, i); |
|
3823 prefetch(next_rxd); |
|
3824 |
|
3825 next_buffer = &rx_ring->buffer_info[i]; |
|
3826 |
|
3827 cleaned = true; |
|
3828 cleaned_count++; |
|
3829 pci_unmap_single(pdev, buffer_info->dma, buffer_info->length, |
|
3830 PCI_DMA_FROMDEVICE); |
|
3831 buffer_info->dma = 0; |
|
3832 |
|
3833 length = le16_to_cpu(rx_desc->length); |
|
3834 /* !EOP means multiple descriptors were used to store a single |
|
3835 * packet, if thats the case we need to toss it. In fact, we |
|
3836 * to toss every packet with the EOP bit clear and the next |
|
3837 * frame that _does_ have the EOP bit set, as it is by |
|
3838 * definition only a frame fragment |
|
3839 */ |
|
3840 if (unlikely(!(status & E1000_RXD_STAT_EOP))) |
|
3841 adapter->discarding = true; |
|
3842 |
|
3843 if (adapter->discarding) { |
|
3844 /* All receives must fit into a single buffer */ |
|
3845 E1000_DBG("%s: Receive packet consumed multiple" |
|
3846 " buffers\n", netdev->name); |
|
3847 /* recycle */ |
|
3848 buffer_info->skb = skb; |
|
3849 if (status & E1000_RXD_STAT_EOP) |
|
3850 adapter->discarding = false; |
|
3851 goto next_desc; |
|
3852 } |
|
3853 |
|
3854 if (unlikely(rx_desc->errors & E1000_RXD_ERR_FRAME_ERR_MASK)) { |
|
3855 u8 last_byte = *(skb->data + length - 1); |
|
3856 if (TBI_ACCEPT(hw, status, rx_desc->errors, length, |
|
3857 last_byte)) { |
|
3858 spin_lock_irqsave(&adapter->stats_lock, flags); |
|
3859 e1000_tbi_adjust_stats(hw, &adapter->stats, |
|
3860 length, skb->data); |
|
3861 spin_unlock_irqrestore(&adapter->stats_lock, |
|
3862 flags); |
|
3863 length--; |
|
3864 } else { |
|
3865 /* recycle */ |
|
3866 buffer_info->skb = skb; |
|
3867 goto next_desc; |
|
3868 } |
|
3869 } |
|
3870 |
|
3871 /* adjust length to remove Ethernet CRC, this must be |
|
3872 * done after the TBI_ACCEPT workaround above */ |
|
3873 length -= 4; |
|
3874 |
|
3875 /* probably a little skewed due to removing CRC */ |
|
3876 total_rx_bytes += length; |
|
3877 total_rx_packets++; |
|
3878 |
|
3879 /* code added for copybreak, this should improve |
|
3880 * performance for small packets with large amounts |
|
3881 * of reassembly being done in the stack */ |
|
3882 if (length < copybreak) { |
|
3883 struct sk_buff *new_skb = |
|
3884 netdev_alloc_skb_ip_align(netdev, length); |
|
3885 if (new_skb) { |
|
3886 skb_copy_to_linear_data_offset(new_skb, |
|
3887 -NET_IP_ALIGN, |
|
3888 (skb->data - |
|
3889 NET_IP_ALIGN), |
|
3890 (length + |
|
3891 NET_IP_ALIGN)); |
|
3892 /* save the skb in buffer_info as good */ |
|
3893 buffer_info->skb = skb; |
|
3894 skb = new_skb; |
|
3895 } |
|
3896 /* else just continue with the old one */ |
|
3897 } |
|
3898 /* end copybreak code */ |
|
3899 skb_put(skb, length); |
|
3900 |
|
3901 /* Receive Checksum Offload */ |
|
3902 e1000_rx_checksum(adapter, |
|
3903 (u32)(status) | |
|
3904 ((u32)(rx_desc->errors) << 24), |
|
3905 le16_to_cpu(rx_desc->csum), skb); |
|
3906 |
|
3907 skb->protocol = eth_type_trans(skb, netdev); |
|
3908 |
|
3909 e1000_receive_skb(adapter, status, rx_desc->special, skb); |
|
3910 |
|
3911 next_desc: |
|
3912 rx_desc->status = 0; |
|
3913 |
|
3914 /* return some buffers to hardware, one at a time is too slow */ |
|
3915 if (unlikely(cleaned_count >= E1000_RX_BUFFER_WRITE)) { |
|
3916 adapter->alloc_rx_buf(adapter, rx_ring, cleaned_count); |
|
3917 cleaned_count = 0; |
|
3918 } |
|
3919 |
|
3920 /* use prefetched values */ |
|
3921 rx_desc = next_rxd; |
|
3922 buffer_info = next_buffer; |
|
3923 } |
|
3924 rx_ring->next_to_clean = i; |
|
3925 |
|
3926 cleaned_count = E1000_DESC_UNUSED(rx_ring); |
|
3927 if (cleaned_count) |
|
3928 adapter->alloc_rx_buf(adapter, rx_ring, cleaned_count); |
|
3929 |
|
3930 adapter->total_rx_packets += total_rx_packets; |
|
3931 adapter->total_rx_bytes += total_rx_bytes; |
|
3932 netdev->stats.rx_bytes += total_rx_bytes; |
|
3933 netdev->stats.rx_packets += total_rx_packets; |
|
3934 return cleaned; |
|
3935 } |
|
3936 |
|
3937 /** |
|
3938 * e1000_alloc_jumbo_rx_buffers - Replace used jumbo receive buffers |
|
3939 * @adapter: address of board private structure |
|
3940 * @rx_ring: pointer to receive ring structure |
|
3941 * @cleaned_count: number of buffers to allocate this pass |
|
3942 **/ |
|
3943 |
|
3944 static void |
|
3945 e1000_alloc_jumbo_rx_buffers(struct e1000_adapter *adapter, |
|
3946 struct e1000_rx_ring *rx_ring, int cleaned_count) |
|
3947 { |
|
3948 struct net_device *netdev = adapter->netdev; |
|
3949 struct pci_dev *pdev = adapter->pdev; |
|
3950 struct e1000_rx_desc *rx_desc; |
|
3951 struct e1000_buffer *buffer_info; |
|
3952 struct sk_buff *skb; |
|
3953 unsigned int i; |
|
3954 unsigned int bufsz = 256 - 16 /*for skb_reserve */ ; |
|
3955 |
|
3956 i = rx_ring->next_to_use; |
|
3957 buffer_info = &rx_ring->buffer_info[i]; |
|
3958 |
|
3959 while (cleaned_count--) { |
|
3960 skb = buffer_info->skb; |
|
3961 if (skb) { |
|
3962 skb_trim(skb, 0); |
|
3963 goto check_page; |
|
3964 } |
|
3965 |
|
3966 skb = netdev_alloc_skb_ip_align(netdev, bufsz); |
|
3967 if (unlikely(!skb)) { |
|
3968 /* Better luck next round */ |
|
3969 adapter->alloc_rx_buff_failed++; |
|
3970 break; |
|
3971 } |
|
3972 |
|
3973 /* Fix for errata 23, can't cross 64kB boundary */ |
|
3974 if (!e1000_check_64k_bound(adapter, skb->data, bufsz)) { |
|
3975 struct sk_buff *oldskb = skb; |
|
3976 DPRINTK(PROBE, ERR, "skb align check failed: %u bytes " |
|
3977 "at %p\n", bufsz, skb->data); |
|
3978 /* Try again, without freeing the previous */ |
|
3979 skb = netdev_alloc_skb_ip_align(netdev, bufsz); |
|
3980 /* Failed allocation, critical failure */ |
|
3981 if (!skb) { |
|
3982 dev_kfree_skb(oldskb); |
|
3983 adapter->alloc_rx_buff_failed++; |
|
3984 break; |
|
3985 } |
|
3986 |
|
3987 if (!e1000_check_64k_bound(adapter, skb->data, bufsz)) { |
|
3988 /* give up */ |
|
3989 dev_kfree_skb(skb); |
|
3990 dev_kfree_skb(oldskb); |
|
3991 break; /* while (cleaned_count--) */ |
|
3992 } |
|
3993 |
|
3994 /* Use new allocation */ |
|
3995 dev_kfree_skb(oldskb); |
|
3996 } |
|
3997 buffer_info->skb = skb; |
|
3998 buffer_info->length = adapter->rx_buffer_len; |
|
3999 check_page: |
|
4000 /* allocate a new page if necessary */ |
|
4001 if (!buffer_info->page) { |
|
4002 buffer_info->page = alloc_page(GFP_ATOMIC); |
|
4003 if (unlikely(!buffer_info->page)) { |
|
4004 adapter->alloc_rx_buff_failed++; |
|
4005 break; |
|
4006 } |
|
4007 } |
|
4008 |
|
4009 if (!buffer_info->dma) { |
|
4010 buffer_info->dma = pci_map_page(pdev, |
|
4011 buffer_info->page, 0, |
|
4012 buffer_info->length, |
|
4013 PCI_DMA_FROMDEVICE); |
|
4014 if (pci_dma_mapping_error(pdev, buffer_info->dma)) { |
|
4015 put_page(buffer_info->page); |
|
4016 dev_kfree_skb(skb); |
|
4017 buffer_info->page = NULL; |
|
4018 buffer_info->skb = NULL; |
|
4019 buffer_info->dma = 0; |
|
4020 adapter->alloc_rx_buff_failed++; |
|
4021 break; /* while !buffer_info->skb */ |
|
4022 } |
|
4023 } |
|
4024 |
|
4025 rx_desc = E1000_RX_DESC(*rx_ring, i); |
|
4026 rx_desc->buffer_addr = cpu_to_le64(buffer_info->dma); |
|
4027 |
|
4028 if (unlikely(++i == rx_ring->count)) |
|
4029 i = 0; |
|
4030 buffer_info = &rx_ring->buffer_info[i]; |
|
4031 } |
|
4032 |
|
4033 if (likely(rx_ring->next_to_use != i)) { |
|
4034 rx_ring->next_to_use = i; |
|
4035 if (unlikely(i-- == 0)) |
|
4036 i = (rx_ring->count - 1); |
|
4037 |
|
4038 /* Force memory writes to complete before letting h/w |
|
4039 * know there are new descriptors to fetch. (Only |
|
4040 * applicable for weak-ordered memory model archs, |
|
4041 * such as IA-64). */ |
|
4042 wmb(); |
|
4043 writel(i, adapter->hw.hw_addr + rx_ring->rdt); |
|
4044 } |
|
4045 } |
|
4046 |
|
4047 /** |
|
4048 * e1000_alloc_rx_buffers - Replace used receive buffers; legacy & extended |
|
4049 * @adapter: address of board private structure |
|
4050 **/ |
|
4051 |
|
4052 static void e1000_alloc_rx_buffers(struct e1000_adapter *adapter, |
|
4053 struct e1000_rx_ring *rx_ring, |
|
4054 int cleaned_count) |
|
4055 { |
|
4056 struct e1000_hw *hw = &adapter->hw; |
|
4057 struct net_device *netdev = adapter->netdev; |
|
4058 struct pci_dev *pdev = adapter->pdev; |
|
4059 struct e1000_rx_desc *rx_desc; |
|
4060 struct e1000_buffer *buffer_info; |
|
4061 struct sk_buff *skb; |
|
4062 unsigned int i; |
|
4063 unsigned int bufsz = adapter->rx_buffer_len; |
|
4064 |
|
4065 i = rx_ring->next_to_use; |
|
4066 buffer_info = &rx_ring->buffer_info[i]; |
|
4067 |
|
4068 while (cleaned_count--) { |
|
4069 skb = buffer_info->skb; |
|
4070 if (skb) { |
|
4071 skb_trim(skb, 0); |
|
4072 goto map_skb; |
|
4073 } |
|
4074 |
|
4075 skb = netdev_alloc_skb_ip_align(netdev, bufsz); |
|
4076 if (unlikely(!skb)) { |
|
4077 /* Better luck next round */ |
|
4078 adapter->alloc_rx_buff_failed++; |
|
4079 break; |
|
4080 } |
|
4081 |
|
4082 /* Fix for errata 23, can't cross 64kB boundary */ |
|
4083 if (!e1000_check_64k_bound(adapter, skb->data, bufsz)) { |
|
4084 struct sk_buff *oldskb = skb; |
|
4085 DPRINTK(RX_ERR, ERR, "skb align check failed: %u bytes " |
|
4086 "at %p\n", bufsz, skb->data); |
|
4087 /* Try again, without freeing the previous */ |
|
4088 skb = netdev_alloc_skb_ip_align(netdev, bufsz); |
|
4089 /* Failed allocation, critical failure */ |
|
4090 if (!skb) { |
|
4091 dev_kfree_skb(oldskb); |
|
4092 adapter->alloc_rx_buff_failed++; |
|
4093 break; |
|
4094 } |
|
4095 |
|
4096 if (!e1000_check_64k_bound(adapter, skb->data, bufsz)) { |
|
4097 /* give up */ |
|
4098 dev_kfree_skb(skb); |
|
4099 dev_kfree_skb(oldskb); |
|
4100 adapter->alloc_rx_buff_failed++; |
|
4101 break; /* while !buffer_info->skb */ |
|
4102 } |
|
4103 |
|
4104 /* Use new allocation */ |
|
4105 dev_kfree_skb(oldskb); |
|
4106 } |
|
4107 buffer_info->skb = skb; |
|
4108 buffer_info->length = adapter->rx_buffer_len; |
|
4109 map_skb: |
|
4110 buffer_info->dma = pci_map_single(pdev, |
|
4111 skb->data, |
|
4112 buffer_info->length, |
|
4113 PCI_DMA_FROMDEVICE); |
|
4114 if (pci_dma_mapping_error(pdev, buffer_info->dma)) { |
|
4115 dev_kfree_skb(skb); |
|
4116 buffer_info->skb = NULL; |
|
4117 buffer_info->dma = 0; |
|
4118 adapter->alloc_rx_buff_failed++; |
|
4119 break; /* while !buffer_info->skb */ |
|
4120 } |
|
4121 |
|
4122 /* |
|
4123 * XXX if it was allocated cleanly it will never map to a |
|
4124 * boundary crossing |
|
4125 */ |
|
4126 |
|
4127 /* Fix for errata 23, can't cross 64kB boundary */ |
|
4128 if (!e1000_check_64k_bound(adapter, |
|
4129 (void *)(unsigned long)buffer_info->dma, |
|
4130 adapter->rx_buffer_len)) { |
|
4131 DPRINTK(RX_ERR, ERR, |
|
4132 "dma align check failed: %u bytes at %p\n", |
|
4133 adapter->rx_buffer_len, |
|
4134 (void *)(unsigned long)buffer_info->dma); |
|
4135 dev_kfree_skb(skb); |
|
4136 buffer_info->skb = NULL; |
|
4137 |
|
4138 pci_unmap_single(pdev, buffer_info->dma, |
|
4139 adapter->rx_buffer_len, |
|
4140 PCI_DMA_FROMDEVICE); |
|
4141 buffer_info->dma = 0; |
|
4142 |
|
4143 adapter->alloc_rx_buff_failed++; |
|
4144 break; /* while !buffer_info->skb */ |
|
4145 } |
|
4146 rx_desc = E1000_RX_DESC(*rx_ring, i); |
|
4147 rx_desc->buffer_addr = cpu_to_le64(buffer_info->dma); |
|
4148 |
|
4149 if (unlikely(++i == rx_ring->count)) |
|
4150 i = 0; |
|
4151 buffer_info = &rx_ring->buffer_info[i]; |
|
4152 } |
|
4153 |
|
4154 if (likely(rx_ring->next_to_use != i)) { |
|
4155 rx_ring->next_to_use = i; |
|
4156 if (unlikely(i-- == 0)) |
|
4157 i = (rx_ring->count - 1); |
|
4158 |
|
4159 /* Force memory writes to complete before letting h/w |
|
4160 * know there are new descriptors to fetch. (Only |
|
4161 * applicable for weak-ordered memory model archs, |
|
4162 * such as IA-64). */ |
|
4163 wmb(); |
|
4164 writel(i, hw->hw_addr + rx_ring->rdt); |
|
4165 } |
|
4166 } |
|
4167 |
|
4168 /** |
|
4169 * e1000_smartspeed - Workaround for SmartSpeed on 82541 and 82547 controllers. |
|
4170 * @adapter: |
|
4171 **/ |
|
4172 |
|
4173 static void e1000_smartspeed(struct e1000_adapter *adapter) |
|
4174 { |
|
4175 struct e1000_hw *hw = &adapter->hw; |
|
4176 u16 phy_status; |
|
4177 u16 phy_ctrl; |
|
4178 |
|
4179 if ((hw->phy_type != e1000_phy_igp) || !hw->autoneg || |
|
4180 !(hw->autoneg_advertised & ADVERTISE_1000_FULL)) |
|
4181 return; |
|
4182 |
|
4183 if (adapter->smartspeed == 0) { |
|
4184 /* If Master/Slave config fault is asserted twice, |
|
4185 * we assume back-to-back */ |
|
4186 e1000_read_phy_reg(hw, PHY_1000T_STATUS, &phy_status); |
|
4187 if (!(phy_status & SR_1000T_MS_CONFIG_FAULT)) return; |
|
4188 e1000_read_phy_reg(hw, PHY_1000T_STATUS, &phy_status); |
|
4189 if (!(phy_status & SR_1000T_MS_CONFIG_FAULT)) return; |
|
4190 e1000_read_phy_reg(hw, PHY_1000T_CTRL, &phy_ctrl); |
|
4191 if (phy_ctrl & CR_1000T_MS_ENABLE) { |
|
4192 phy_ctrl &= ~CR_1000T_MS_ENABLE; |
|
4193 e1000_write_phy_reg(hw, PHY_1000T_CTRL, |
|
4194 phy_ctrl); |
|
4195 adapter->smartspeed++; |
|
4196 if (!e1000_phy_setup_autoneg(hw) && |
|
4197 !e1000_read_phy_reg(hw, PHY_CTRL, |
|
4198 &phy_ctrl)) { |
|
4199 phy_ctrl |= (MII_CR_AUTO_NEG_EN | |
|
4200 MII_CR_RESTART_AUTO_NEG); |
|
4201 e1000_write_phy_reg(hw, PHY_CTRL, |
|
4202 phy_ctrl); |
|
4203 } |
|
4204 } |
|
4205 return; |
|
4206 } else if (adapter->smartspeed == E1000_SMARTSPEED_DOWNSHIFT) { |
|
4207 /* If still no link, perhaps using 2/3 pair cable */ |
|
4208 e1000_read_phy_reg(hw, PHY_1000T_CTRL, &phy_ctrl); |
|
4209 phy_ctrl |= CR_1000T_MS_ENABLE; |
|
4210 e1000_write_phy_reg(hw, PHY_1000T_CTRL, phy_ctrl); |
|
4211 if (!e1000_phy_setup_autoneg(hw) && |
|
4212 !e1000_read_phy_reg(hw, PHY_CTRL, &phy_ctrl)) { |
|
4213 phy_ctrl |= (MII_CR_AUTO_NEG_EN | |
|
4214 MII_CR_RESTART_AUTO_NEG); |
|
4215 e1000_write_phy_reg(hw, PHY_CTRL, phy_ctrl); |
|
4216 } |
|
4217 } |
|
4218 /* Restart process after E1000_SMARTSPEED_MAX iterations */ |
|
4219 if (adapter->smartspeed++ == E1000_SMARTSPEED_MAX) |
|
4220 adapter->smartspeed = 0; |
|
4221 } |
|
4222 |
|
4223 /** |
|
4224 * e1000_ioctl - |
|
4225 * @netdev: |
|
4226 * @ifreq: |
|
4227 * @cmd: |
|
4228 **/ |
|
4229 |
|
4230 static int e1000_ioctl(struct net_device *netdev, struct ifreq *ifr, int cmd) |
|
4231 { |
|
4232 switch (cmd) { |
|
4233 case SIOCGMIIPHY: |
|
4234 case SIOCGMIIREG: |
|
4235 case SIOCSMIIREG: |
|
4236 return e1000_mii_ioctl(netdev, ifr, cmd); |
|
4237 default: |
|
4238 return -EOPNOTSUPP; |
|
4239 } |
|
4240 } |
|
4241 |
|
4242 /** |
|
4243 * e1000_mii_ioctl - |
|
4244 * @netdev: |
|
4245 * @ifreq: |
|
4246 * @cmd: |
|
4247 **/ |
|
4248 |
|
4249 static int e1000_mii_ioctl(struct net_device *netdev, struct ifreq *ifr, |
|
4250 int cmd) |
|
4251 { |
|
4252 struct e1000_adapter *adapter = netdev_priv(netdev); |
|
4253 struct e1000_hw *hw = &adapter->hw; |
|
4254 struct mii_ioctl_data *data = if_mii(ifr); |
|
4255 int retval; |
|
4256 u16 mii_reg; |
|
4257 u16 spddplx; |
|
4258 unsigned long flags; |
|
4259 |
|
4260 if (hw->media_type != e1000_media_type_copper) |
|
4261 return -EOPNOTSUPP; |
|
4262 |
|
4263 switch (cmd) { |
|
4264 case SIOCGMIIPHY: |
|
4265 data->phy_id = hw->phy_addr; |
|
4266 break; |
|
4267 case SIOCGMIIREG: |
|
4268 spin_lock_irqsave(&adapter->stats_lock, flags); |
|
4269 if (e1000_read_phy_reg(hw, data->reg_num & 0x1F, |
|
4270 &data->val_out)) { |
|
4271 spin_unlock_irqrestore(&adapter->stats_lock, flags); |
|
4272 return -EIO; |
|
4273 } |
|
4274 spin_unlock_irqrestore(&adapter->stats_lock, flags); |
|
4275 break; |
|
4276 case SIOCSMIIREG: |
|
4277 if (data->reg_num & ~(0x1F)) |
|
4278 return -EFAULT; |
|
4279 mii_reg = data->val_in; |
|
4280 spin_lock_irqsave(&adapter->stats_lock, flags); |
|
4281 if (e1000_write_phy_reg(hw, data->reg_num, |
|
4282 mii_reg)) { |
|
4283 spin_unlock_irqrestore(&adapter->stats_lock, flags); |
|
4284 return -EIO; |
|
4285 } |
|
4286 spin_unlock_irqrestore(&adapter->stats_lock, flags); |
|
4287 if (hw->media_type == e1000_media_type_copper) { |
|
4288 switch (data->reg_num) { |
|
4289 case PHY_CTRL: |
|
4290 if (mii_reg & MII_CR_POWER_DOWN) |
|
4291 break; |
|
4292 if (mii_reg & MII_CR_AUTO_NEG_EN) { |
|
4293 hw->autoneg = 1; |
|
4294 hw->autoneg_advertised = 0x2F; |
|
4295 } else { |
|
4296 if (mii_reg & 0x40) |
|
4297 spddplx = SPEED_1000; |
|
4298 else if (mii_reg & 0x2000) |
|
4299 spddplx = SPEED_100; |
|
4300 else |
|
4301 spddplx = SPEED_10; |
|
4302 spddplx += (mii_reg & 0x100) |
|
4303 ? DUPLEX_FULL : |
|
4304 DUPLEX_HALF; |
|
4305 retval = e1000_set_spd_dplx(adapter, |
|
4306 spddplx); |
|
4307 if (retval) |
|
4308 return retval; |
|
4309 } |
|
4310 if (netif_running(adapter->netdev)) |
|
4311 e1000_reinit_locked(adapter); |
|
4312 else |
|
4313 e1000_reset(adapter); |
|
4314 break; |
|
4315 case M88E1000_PHY_SPEC_CTRL: |
|
4316 case M88E1000_EXT_PHY_SPEC_CTRL: |
|
4317 if (e1000_phy_reset(hw)) |
|
4318 return -EIO; |
|
4319 break; |
|
4320 } |
|
4321 } else { |
|
4322 switch (data->reg_num) { |
|
4323 case PHY_CTRL: |
|
4324 if (mii_reg & MII_CR_POWER_DOWN) |
|
4325 break; |
|
4326 if (netif_running(adapter->netdev)) |
|
4327 e1000_reinit_locked(adapter); |
|
4328 else |
|
4329 e1000_reset(adapter); |
|
4330 break; |
|
4331 } |
|
4332 } |
|
4333 break; |
|
4334 default: |
|
4335 return -EOPNOTSUPP; |
|
4336 } |
|
4337 return E1000_SUCCESS; |
|
4338 } |
|
4339 |
|
4340 void e1000_pci_set_mwi(struct e1000_hw *hw) |
|
4341 { |
|
4342 struct e1000_adapter *adapter = hw->back; |
|
4343 int ret_val = pci_set_mwi(adapter->pdev); |
|
4344 |
|
4345 if (ret_val) |
|
4346 DPRINTK(PROBE, ERR, "Error in setting MWI\n"); |
|
4347 } |
|
4348 |
|
4349 void e1000_pci_clear_mwi(struct e1000_hw *hw) |
|
4350 { |
|
4351 struct e1000_adapter *adapter = hw->back; |
|
4352 |
|
4353 pci_clear_mwi(adapter->pdev); |
|
4354 } |
|
4355 |
|
4356 int e1000_pcix_get_mmrbc(struct e1000_hw *hw) |
|
4357 { |
|
4358 struct e1000_adapter *adapter = hw->back; |
|
4359 return pcix_get_mmrbc(adapter->pdev); |
|
4360 } |
|
4361 |
|
4362 void e1000_pcix_set_mmrbc(struct e1000_hw *hw, int mmrbc) |
|
4363 { |
|
4364 struct e1000_adapter *adapter = hw->back; |
|
4365 pcix_set_mmrbc(adapter->pdev, mmrbc); |
|
4366 } |
|
4367 |
|
4368 void e1000_io_write(struct e1000_hw *hw, unsigned long port, u32 value) |
|
4369 { |
|
4370 outl(value, port); |
|
4371 } |
|
4372 |
|
4373 static void e1000_vlan_rx_register(struct net_device *netdev, |
|
4374 struct vlan_group *grp) |
|
4375 { |
|
4376 struct e1000_adapter *adapter = netdev_priv(netdev); |
|
4377 struct e1000_hw *hw = &adapter->hw; |
|
4378 u32 ctrl, rctl; |
|
4379 |
|
4380 if (!test_bit(__E1000_DOWN, &adapter->flags)) |
|
4381 e1000_irq_disable(adapter); |
|
4382 adapter->vlgrp = grp; |
|
4383 |
|
4384 if (grp) { |
|
4385 /* enable VLAN tag insert/strip */ |
|
4386 ctrl = er32(CTRL); |
|
4387 ctrl |= E1000_CTRL_VME; |
|
4388 ew32(CTRL, ctrl); |
|
4389 |
|
4390 /* enable VLAN receive filtering */ |
|
4391 rctl = er32(RCTL); |
|
4392 rctl &= ~E1000_RCTL_CFIEN; |
|
4393 if (!(netdev->flags & IFF_PROMISC)) |
|
4394 rctl |= E1000_RCTL_VFE; |
|
4395 ew32(RCTL, rctl); |
|
4396 e1000_update_mng_vlan(adapter); |
|
4397 } else { |
|
4398 /* disable VLAN tag insert/strip */ |
|
4399 ctrl = er32(CTRL); |
|
4400 ctrl &= ~E1000_CTRL_VME; |
|
4401 ew32(CTRL, ctrl); |
|
4402 |
|
4403 /* disable VLAN receive filtering */ |
|
4404 rctl = er32(RCTL); |
|
4405 rctl &= ~E1000_RCTL_VFE; |
|
4406 ew32(RCTL, rctl); |
|
4407 |
|
4408 if (adapter->mng_vlan_id != (u16)E1000_MNG_VLAN_NONE) { |
|
4409 e1000_vlan_rx_kill_vid(netdev, adapter->mng_vlan_id); |
|
4410 adapter->mng_vlan_id = E1000_MNG_VLAN_NONE; |
|
4411 } |
|
4412 } |
|
4413 |
|
4414 if (!test_bit(__E1000_DOWN, &adapter->flags)) |
|
4415 e1000_irq_enable(adapter); |
|
4416 } |
|
4417 |
|
4418 static void e1000_vlan_rx_add_vid(struct net_device *netdev, u16 vid) |
|
4419 { |
|
4420 struct e1000_adapter *adapter = netdev_priv(netdev); |
|
4421 struct e1000_hw *hw = &adapter->hw; |
|
4422 u32 vfta, index; |
|
4423 |
|
4424 if ((hw->mng_cookie.status & |
|
4425 E1000_MNG_DHCP_COOKIE_STATUS_VLAN_SUPPORT) && |
|
4426 (vid == adapter->mng_vlan_id)) |
|
4427 return; |
|
4428 /* add VID to filter table */ |
|
4429 index = (vid >> 5) & 0x7F; |
|
4430 vfta = E1000_READ_REG_ARRAY(hw, VFTA, index); |
|
4431 vfta |= (1 << (vid & 0x1F)); |
|
4432 e1000_write_vfta(hw, index, vfta); |
|
4433 } |
|
4434 |
|
4435 static void e1000_vlan_rx_kill_vid(struct net_device *netdev, u16 vid) |
|
4436 { |
|
4437 struct e1000_adapter *adapter = netdev_priv(netdev); |
|
4438 struct e1000_hw *hw = &adapter->hw; |
|
4439 u32 vfta, index; |
|
4440 |
|
4441 if (!test_bit(__E1000_DOWN, &adapter->flags)) |
|
4442 e1000_irq_disable(adapter); |
|
4443 vlan_group_set_device(adapter->vlgrp, vid, NULL); |
|
4444 if (!test_bit(__E1000_DOWN, &adapter->flags)) |
|
4445 e1000_irq_enable(adapter); |
|
4446 |
|
4447 /* remove VID from filter table */ |
|
4448 index = (vid >> 5) & 0x7F; |
|
4449 vfta = E1000_READ_REG_ARRAY(hw, VFTA, index); |
|
4450 vfta &= ~(1 << (vid & 0x1F)); |
|
4451 e1000_write_vfta(hw, index, vfta); |
|
4452 } |
|
4453 |
|
4454 static void e1000_restore_vlan(struct e1000_adapter *adapter) |
|
4455 { |
|
4456 e1000_vlan_rx_register(adapter->netdev, adapter->vlgrp); |
|
4457 |
|
4458 if (adapter->vlgrp) { |
|
4459 u16 vid; |
|
4460 for (vid = 0; vid < VLAN_GROUP_ARRAY_LEN; vid++) { |
|
4461 if (!vlan_group_get_device(adapter->vlgrp, vid)) |
|
4462 continue; |
|
4463 e1000_vlan_rx_add_vid(adapter->netdev, vid); |
|
4464 } |
|
4465 } |
|
4466 } |
|
4467 |
|
4468 int e1000_set_spd_dplx(struct e1000_adapter *adapter, u16 spddplx) |
|
4469 { |
|
4470 struct e1000_hw *hw = &adapter->hw; |
|
4471 |
|
4472 hw->autoneg = 0; |
|
4473 |
|
4474 /* Fiber NICs only allow 1000 gbps Full duplex */ |
|
4475 if ((hw->media_type == e1000_media_type_fiber) && |
|
4476 spddplx != (SPEED_1000 + DUPLEX_FULL)) { |
|
4477 DPRINTK(PROBE, ERR, "Unsupported Speed/Duplex configuration\n"); |
|
4478 return -EINVAL; |
|
4479 } |
|
4480 |
|
4481 switch (spddplx) { |
|
4482 case SPEED_10 + DUPLEX_HALF: |
|
4483 hw->forced_speed_duplex = e1000_10_half; |
|
4484 break; |
|
4485 case SPEED_10 + DUPLEX_FULL: |
|
4486 hw->forced_speed_duplex = e1000_10_full; |
|
4487 break; |
|
4488 case SPEED_100 + DUPLEX_HALF: |
|
4489 hw->forced_speed_duplex = e1000_100_half; |
|
4490 break; |
|
4491 case SPEED_100 + DUPLEX_FULL: |
|
4492 hw->forced_speed_duplex = e1000_100_full; |
|
4493 break; |
|
4494 case SPEED_1000 + DUPLEX_FULL: |
|
4495 hw->autoneg = 1; |
|
4496 hw->autoneg_advertised = ADVERTISE_1000_FULL; |
|
4497 break; |
|
4498 case SPEED_1000 + DUPLEX_HALF: /* not supported */ |
|
4499 default: |
|
4500 DPRINTK(PROBE, ERR, "Unsupported Speed/Duplex configuration\n"); |
|
4501 return -EINVAL; |
|
4502 } |
|
4503 return 0; |
|
4504 } |
|
4505 |
|
4506 static int __e1000_shutdown(struct pci_dev *pdev, bool *enable_wake) |
|
4507 { |
|
4508 struct net_device *netdev = pci_get_drvdata(pdev); |
|
4509 struct e1000_adapter *adapter = netdev_priv(netdev); |
|
4510 struct e1000_hw *hw = &adapter->hw; |
|
4511 u32 ctrl, ctrl_ext, rctl, status; |
|
4512 u32 wufc = adapter->wol; |
|
4513 #ifdef CONFIG_PM |
|
4514 int retval = 0; |
|
4515 #endif |
|
4516 |
|
4517 netif_device_detach(netdev); |
|
4518 |
|
4519 if (netif_running(netdev)) { |
|
4520 WARN_ON(test_bit(__E1000_RESETTING, &adapter->flags)); |
|
4521 e1000_down(adapter); |
|
4522 } |
|
4523 |
|
4524 #ifdef CONFIG_PM |
|
4525 retval = pci_save_state(pdev); |
|
4526 if (retval) |
|
4527 return retval; |
|
4528 #endif |
|
4529 |
|
4530 status = er32(STATUS); |
|
4531 if (status & E1000_STATUS_LU) |
|
4532 wufc &= ~E1000_WUFC_LNKC; |
|
4533 |
|
4534 if (wufc) { |
|
4535 e1000_setup_rctl(adapter); |
|
4536 e1000_set_rx_mode(netdev); |
|
4537 |
|
4538 /* turn on all-multi mode if wake on multicast is enabled */ |
|
4539 if (wufc & E1000_WUFC_MC) { |
|
4540 rctl = er32(RCTL); |
|
4541 rctl |= E1000_RCTL_MPE; |
|
4542 ew32(RCTL, rctl); |
|
4543 } |
|
4544 |
|
4545 if (hw->mac_type >= e1000_82540) { |
|
4546 ctrl = er32(CTRL); |
|
4547 /* advertise wake from D3Cold */ |
|
4548 #define E1000_CTRL_ADVD3WUC 0x00100000 |
|
4549 /* phy power management enable */ |
|
4550 #define E1000_CTRL_EN_PHY_PWR_MGMT 0x00200000 |
|
4551 ctrl |= E1000_CTRL_ADVD3WUC | |
|
4552 E1000_CTRL_EN_PHY_PWR_MGMT; |
|
4553 ew32(CTRL, ctrl); |
|
4554 } |
|
4555 |
|
4556 if (hw->media_type == e1000_media_type_fiber || |
|
4557 hw->media_type == e1000_media_type_internal_serdes) { |
|
4558 /* keep the laser running in D3 */ |
|
4559 ctrl_ext = er32(CTRL_EXT); |
|
4560 ctrl_ext |= E1000_CTRL_EXT_SDP7_DATA; |
|
4561 ew32(CTRL_EXT, ctrl_ext); |
|
4562 } |
|
4563 |
|
4564 ew32(WUC, E1000_WUC_PME_EN); |
|
4565 ew32(WUFC, wufc); |
|
4566 } else { |
|
4567 ew32(WUC, 0); |
|
4568 ew32(WUFC, 0); |
|
4569 } |
|
4570 |
|
4571 e1000_release_manageability(adapter); |
|
4572 |
|
4573 *enable_wake = !!wufc; |
|
4574 |
|
4575 /* make sure adapter isn't asleep if manageability is enabled */ |
|
4576 if (adapter->en_mng_pt) |
|
4577 *enable_wake = true; |
|
4578 |
|
4579 if (netif_running(netdev)) |
|
4580 e1000_free_irq(adapter); |
|
4581 |
|
4582 pci_disable_device(pdev); |
|
4583 |
|
4584 return 0; |
|
4585 } |
|
4586 |
|
4587 #ifdef CONFIG_PM |
|
4588 static int e1000_suspend(struct pci_dev *pdev, pm_message_t state) |
|
4589 { |
|
4590 int retval; |
|
4591 bool wake; |
|
4592 |
|
4593 retval = __e1000_shutdown(pdev, &wake); |
|
4594 if (retval) |
|
4595 return retval; |
|
4596 |
|
4597 if (wake) { |
|
4598 pci_prepare_to_sleep(pdev); |
|
4599 } else { |
|
4600 pci_wake_from_d3(pdev, false); |
|
4601 pci_set_power_state(pdev, PCI_D3hot); |
|
4602 } |
|
4603 |
|
4604 return 0; |
|
4605 } |
|
4606 |
|
4607 static int e1000_resume(struct pci_dev *pdev) |
|
4608 { |
|
4609 struct net_device *netdev = pci_get_drvdata(pdev); |
|
4610 struct e1000_adapter *adapter = netdev_priv(netdev); |
|
4611 struct e1000_hw *hw = &adapter->hw; |
|
4612 u32 err; |
|
4613 |
|
4614 pci_set_power_state(pdev, PCI_D0); |
|
4615 pci_restore_state(pdev); |
|
4616 |
|
4617 if (adapter->need_ioport) |
|
4618 err = pci_enable_device(pdev); |
|
4619 else |
|
4620 err = pci_enable_device_mem(pdev); |
|
4621 if (err) { |
|
4622 printk(KERN_ERR "e1000: Cannot enable PCI device from suspend\n"); |
|
4623 return err; |
|
4624 } |
|
4625 pci_set_master(pdev); |
|
4626 |
|
4627 pci_enable_wake(pdev, PCI_D3hot, 0); |
|
4628 pci_enable_wake(pdev, PCI_D3cold, 0); |
|
4629 |
|
4630 if (netif_running(netdev)) { |
|
4631 err = e1000_request_irq(adapter); |
|
4632 if (err) |
|
4633 return err; |
|
4634 } |
|
4635 |
|
4636 e1000_power_up_phy(adapter); |
|
4637 e1000_reset(adapter); |
|
4638 ew32(WUS, ~0); |
|
4639 |
|
4640 e1000_init_manageability(adapter); |
|
4641 |
|
4642 if (netif_running(netdev)) |
|
4643 e1000_up(adapter); |
|
4644 |
|
4645 netif_device_attach(netdev); |
|
4646 |
|
4647 return 0; |
|
4648 } |
|
4649 #endif |
|
4650 |
|
4651 static void e1000_shutdown(struct pci_dev *pdev) |
|
4652 { |
|
4653 bool wake; |
|
4654 |
|
4655 __e1000_shutdown(pdev, &wake); |
|
4656 |
|
4657 if (system_state == SYSTEM_POWER_OFF) { |
|
4658 pci_wake_from_d3(pdev, wake); |
|
4659 pci_set_power_state(pdev, PCI_D3hot); |
|
4660 } |
|
4661 } |
|
4662 |
|
4663 #ifdef CONFIG_NET_POLL_CONTROLLER |
|
4664 /* |
|
4665 * Polling 'interrupt' - used by things like netconsole to send skbs |
|
4666 * without having to re-enable interrupts. It's not called while |
|
4667 * the interrupt routine is executing. |
|
4668 */ |
|
4669 static void e1000_netpoll(struct net_device *netdev) |
|
4670 { |
|
4671 struct e1000_adapter *adapter = netdev_priv(netdev); |
|
4672 |
|
4673 disable_irq(adapter->pdev->irq); |
|
4674 e1000_intr(adapter->pdev->irq, netdev); |
|
4675 enable_irq(adapter->pdev->irq); |
|
4676 } |
|
4677 #endif |
|
4678 |
|
4679 /** |
|
4680 * e1000_io_error_detected - called when PCI error is detected |
|
4681 * @pdev: Pointer to PCI device |
|
4682 * @state: The current pci connection state |
|
4683 * |
|
4684 * This function is called after a PCI bus error affecting |
|
4685 * this device has been detected. |
|
4686 */ |
|
4687 static pci_ers_result_t e1000_io_error_detected(struct pci_dev *pdev, |
|
4688 pci_channel_state_t state) |
|
4689 { |
|
4690 struct net_device *netdev = pci_get_drvdata(pdev); |
|
4691 struct e1000_adapter *adapter = netdev_priv(netdev); |
|
4692 |
|
4693 netif_device_detach(netdev); |
|
4694 |
|
4695 if (state == pci_channel_io_perm_failure) |
|
4696 return PCI_ERS_RESULT_DISCONNECT; |
|
4697 |
|
4698 if (netif_running(netdev)) |
|
4699 e1000_down(adapter); |
|
4700 pci_disable_device(pdev); |
|
4701 |
|
4702 /* Request a slot slot reset. */ |
|
4703 return PCI_ERS_RESULT_NEED_RESET; |
|
4704 } |
|
4705 |
|
4706 /** |
|
4707 * e1000_io_slot_reset - called after the pci bus has been reset. |
|
4708 * @pdev: Pointer to PCI device |
|
4709 * |
|
4710 * Restart the card from scratch, as if from a cold-boot. Implementation |
|
4711 * resembles the first-half of the e1000_resume routine. |
|
4712 */ |
|
4713 static pci_ers_result_t e1000_io_slot_reset(struct pci_dev *pdev) |
|
4714 { |
|
4715 struct net_device *netdev = pci_get_drvdata(pdev); |
|
4716 struct e1000_adapter *adapter = netdev_priv(netdev); |
|
4717 struct e1000_hw *hw = &adapter->hw; |
|
4718 int err; |
|
4719 |
|
4720 if (adapter->need_ioport) |
|
4721 err = pci_enable_device(pdev); |
|
4722 else |
|
4723 err = pci_enable_device_mem(pdev); |
|
4724 if (err) { |
|
4725 printk(KERN_ERR "e1000: Cannot re-enable PCI device after reset.\n"); |
|
4726 return PCI_ERS_RESULT_DISCONNECT; |
|
4727 } |
|
4728 pci_set_master(pdev); |
|
4729 |
|
4730 pci_enable_wake(pdev, PCI_D3hot, 0); |
|
4731 pci_enable_wake(pdev, PCI_D3cold, 0); |
|
4732 |
|
4733 e1000_reset(adapter); |
|
4734 ew32(WUS, ~0); |
|
4735 |
|
4736 return PCI_ERS_RESULT_RECOVERED; |
|
4737 } |
|
4738 |
|
4739 /** |
|
4740 * e1000_io_resume - called when traffic can start flowing again. |
|
4741 * @pdev: Pointer to PCI device |
|
4742 * |
|
4743 * This callback is called when the error recovery driver tells us that |
|
4744 * its OK to resume normal operation. Implementation resembles the |
|
4745 * second-half of the e1000_resume routine. |
|
4746 */ |
|
4747 static void e1000_io_resume(struct pci_dev *pdev) |
|
4748 { |
|
4749 struct net_device *netdev = pci_get_drvdata(pdev); |
|
4750 struct e1000_adapter *adapter = netdev_priv(netdev); |
|
4751 |
|
4752 e1000_init_manageability(adapter); |
|
4753 |
|
4754 if (netif_running(netdev)) { |
|
4755 if (e1000_up(adapter)) { |
|
4756 printk("e1000: can't bring device back up after reset\n"); |
|
4757 return; |
|
4758 } |
|
4759 } |
|
4760 |
|
4761 netif_device_attach(netdev); |
|
4762 } |
|
4763 |
|
4764 /* e1000_main.c */ |