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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 vim: noexpandtab |
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28 |
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29 *******************************************************************************/ |
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30 |
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31 #include "e1000-3.4-ethercat.h" |
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32 #include <net/ip6_checksum.h> |
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33 #include <linux/io.h> |
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34 #include <linux/prefetch.h> |
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35 #include <linux/bitops.h> |
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36 #include <linux/if_vlan.h> |
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37 |
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38 char e1000_driver_name[] = "ec_e1000"; |
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39 static char e1000_driver_string[] = "Intel(R) PRO/1000 Network Driver"; |
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40 #define DRV_VERSION "7.3.21-k8-NAPI" |
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41 const char e1000_driver_version[] = DRV_VERSION; |
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42 static const char e1000_copyright[] = "Copyright (c) 1999-2006 Intel Corporation."; |
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43 |
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44 /* e1000_pci_tbl - PCI Device ID Table |
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45 * |
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46 * Last entry must be all 0s |
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47 * |
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48 * Macro expands to... |
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49 * {PCI_DEVICE(PCI_VENDOR_ID_INTEL, device_id)} |
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50 */ |
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51 static DEFINE_PCI_DEVICE_TABLE(e1000_pci_tbl) = { |
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52 INTEL_E1000_ETHERNET_DEVICE(0x1000), |
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53 INTEL_E1000_ETHERNET_DEVICE(0x1001), |
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54 INTEL_E1000_ETHERNET_DEVICE(0x1004), |
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55 INTEL_E1000_ETHERNET_DEVICE(0x1008), |
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56 INTEL_E1000_ETHERNET_DEVICE(0x1009), |
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57 INTEL_E1000_ETHERNET_DEVICE(0x100C), |
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58 INTEL_E1000_ETHERNET_DEVICE(0x100D), |
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59 INTEL_E1000_ETHERNET_DEVICE(0x100E), |
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60 INTEL_E1000_ETHERNET_DEVICE(0x100F), |
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61 INTEL_E1000_ETHERNET_DEVICE(0x1010), |
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62 INTEL_E1000_ETHERNET_DEVICE(0x1011), |
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63 INTEL_E1000_ETHERNET_DEVICE(0x1012), |
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64 INTEL_E1000_ETHERNET_DEVICE(0x1013), |
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65 INTEL_E1000_ETHERNET_DEVICE(0x1014), |
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66 INTEL_E1000_ETHERNET_DEVICE(0x1015), |
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67 INTEL_E1000_ETHERNET_DEVICE(0x1016), |
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68 INTEL_E1000_ETHERNET_DEVICE(0x1017), |
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69 INTEL_E1000_ETHERNET_DEVICE(0x1018), |
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70 INTEL_E1000_ETHERNET_DEVICE(0x1019), |
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71 INTEL_E1000_ETHERNET_DEVICE(0x101A), |
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72 INTEL_E1000_ETHERNET_DEVICE(0x101D), |
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73 INTEL_E1000_ETHERNET_DEVICE(0x101E), |
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74 INTEL_E1000_ETHERNET_DEVICE(0x1026), |
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75 INTEL_E1000_ETHERNET_DEVICE(0x1027), |
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76 INTEL_E1000_ETHERNET_DEVICE(0x1028), |
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77 INTEL_E1000_ETHERNET_DEVICE(0x1075), |
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78 INTEL_E1000_ETHERNET_DEVICE(0x1076), |
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79 INTEL_E1000_ETHERNET_DEVICE(0x1077), |
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80 INTEL_E1000_ETHERNET_DEVICE(0x1078), |
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81 INTEL_E1000_ETHERNET_DEVICE(0x1079), |
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82 INTEL_E1000_ETHERNET_DEVICE(0x107A), |
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83 INTEL_E1000_ETHERNET_DEVICE(0x107B), |
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84 INTEL_E1000_ETHERNET_DEVICE(0x107C), |
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85 INTEL_E1000_ETHERNET_DEVICE(0x108A), |
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86 INTEL_E1000_ETHERNET_DEVICE(0x1099), |
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87 INTEL_E1000_ETHERNET_DEVICE(0x10B5), |
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88 INTEL_E1000_ETHERNET_DEVICE(0x2E6E), |
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89 /* required last entry */ |
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90 {0,} |
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91 }; |
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92 |
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93 // do not auto-load driver |
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94 // MODULE_DEVICE_TABLE(pci, e1000_pci_tbl); |
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95 |
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96 int e1000_up(struct e1000_adapter *adapter); |
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97 void e1000_down(struct e1000_adapter *adapter); |
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98 void e1000_reinit_locked(struct e1000_adapter *adapter); |
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99 void e1000_reset(struct e1000_adapter *adapter); |
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100 int e1000_setup_all_tx_resources(struct e1000_adapter *adapter); |
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101 int e1000_setup_all_rx_resources(struct e1000_adapter *adapter); |
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102 void e1000_free_all_tx_resources(struct e1000_adapter *adapter); |
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103 void e1000_free_all_rx_resources(struct e1000_adapter *adapter); |
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104 static int e1000_setup_tx_resources(struct e1000_adapter *adapter, |
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105 struct e1000_tx_ring *txdr); |
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106 static int e1000_setup_rx_resources(struct e1000_adapter *adapter, |
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107 struct e1000_rx_ring *rxdr); |
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108 static void e1000_free_tx_resources(struct e1000_adapter *adapter, |
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109 struct e1000_tx_ring *tx_ring); |
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110 static void e1000_free_rx_resources(struct e1000_adapter *adapter, |
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111 struct e1000_rx_ring *rx_ring); |
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112 void e1000_update_stats(struct e1000_adapter *adapter); |
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113 |
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114 static int e1000_init_module(void); |
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115 static void e1000_exit_module(void); |
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116 static int e1000_probe(struct pci_dev *pdev, const struct pci_device_id *ent); |
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117 static void __devexit e1000_remove(struct pci_dev *pdev); |
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118 static int e1000_alloc_queues(struct e1000_adapter *adapter); |
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119 static int e1000_sw_init(struct e1000_adapter *adapter); |
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120 static int e1000_open(struct net_device *netdev); |
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121 static int e1000_close(struct net_device *netdev); |
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122 static void e1000_configure_tx(struct e1000_adapter *adapter); |
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123 static void e1000_configure_rx(struct e1000_adapter *adapter); |
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124 static void e1000_setup_rctl(struct e1000_adapter *adapter); |
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125 static void e1000_clean_all_tx_rings(struct e1000_adapter *adapter); |
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126 static void e1000_clean_all_rx_rings(struct e1000_adapter *adapter); |
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127 static void e1000_clean_tx_ring(struct e1000_adapter *adapter, |
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128 struct e1000_tx_ring *tx_ring); |
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129 static void e1000_clean_rx_ring(struct e1000_adapter *adapter, |
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130 struct e1000_rx_ring *rx_ring); |
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131 static void e1000_set_rx_mode(struct net_device *netdev); |
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132 static void e1000_update_phy_info_task(struct work_struct *work); |
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133 static void e1000_watchdog(struct work_struct *work); |
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134 static void e1000_82547_tx_fifo_stall_task(struct work_struct *work); |
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135 static netdev_tx_t e1000_xmit_frame(struct sk_buff *skb, |
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136 struct net_device *netdev); |
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137 static struct net_device_stats * e1000_get_stats(struct net_device *netdev); |
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138 static int e1000_change_mtu(struct net_device *netdev, int new_mtu); |
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139 static int e1000_set_mac(struct net_device *netdev, void *p); |
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140 void ec_poll(struct net_device *); |
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141 static irqreturn_t e1000_intr(int irq, void *data); |
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142 static bool e1000_clean_tx_irq(struct e1000_adapter *adapter, |
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143 struct e1000_tx_ring *tx_ring); |
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144 static int e1000_clean(struct napi_struct *napi, int budget); |
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145 static bool e1000_clean_rx_irq(struct e1000_adapter *adapter, |
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146 struct e1000_rx_ring *rx_ring, |
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147 int *work_done, int work_to_do); |
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148 static bool e1000_clean_jumbo_rx_irq(struct e1000_adapter *adapter, |
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149 struct e1000_rx_ring *rx_ring, |
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150 int *work_done, int work_to_do); |
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151 static void e1000_alloc_rx_buffers(struct e1000_adapter *adapter, |
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152 struct e1000_rx_ring *rx_ring, |
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153 int cleaned_count); |
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154 static void e1000_alloc_jumbo_rx_buffers(struct e1000_adapter *adapter, |
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155 struct e1000_rx_ring *rx_ring, |
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156 int cleaned_count); |
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157 static int e1000_ioctl(struct net_device *netdev, struct ifreq *ifr, int cmd); |
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158 static int e1000_mii_ioctl(struct net_device *netdev, struct ifreq *ifr, |
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159 int cmd); |
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160 static void e1000_enter_82542_rst(struct e1000_adapter *adapter); |
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161 static void e1000_leave_82542_rst(struct e1000_adapter *adapter); |
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162 static void e1000_tx_timeout(struct net_device *dev); |
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163 static void e1000_reset_task(struct work_struct *work); |
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164 static void e1000_smartspeed(struct e1000_adapter *adapter); |
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165 static int e1000_82547_fifo_workaround(struct e1000_adapter *adapter, |
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166 struct sk_buff *skb); |
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167 |
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168 static bool e1000_vlan_used(struct e1000_adapter *adapter); |
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169 static void e1000_vlan_mode(struct net_device *netdev, |
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170 netdev_features_t features); |
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171 static void e1000_vlan_filter_on_off(struct e1000_adapter *adapter, |
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172 bool filter_on); |
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173 static int e1000_vlan_rx_add_vid(struct net_device *netdev, u16 vid); |
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174 static int e1000_vlan_rx_kill_vid(struct net_device *netdev, u16 vid); |
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175 static void e1000_restore_vlan(struct e1000_adapter *adapter); |
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176 |
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177 #ifdef CONFIG_PM |
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178 static int e1000_suspend(struct pci_dev *pdev, pm_message_t state); |
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179 static int e1000_resume(struct pci_dev *pdev); |
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180 #endif |
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181 static void e1000_shutdown(struct pci_dev *pdev); |
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182 |
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183 #ifdef CONFIG_NET_POLL_CONTROLLER |
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184 /* for netdump / net console */ |
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185 static void e1000_netpoll (struct net_device *netdev); |
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186 #endif |
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187 |
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188 #define COPYBREAK_DEFAULT 256 |
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189 static unsigned int copybreak __read_mostly = COPYBREAK_DEFAULT; |
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190 module_param(copybreak, uint, 0644); |
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191 MODULE_PARM_DESC(copybreak, |
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192 "Maximum size of packet that is copied to a new buffer on receive"); |
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193 |
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194 static pci_ers_result_t e1000_io_error_detected(struct pci_dev *pdev, |
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195 pci_channel_state_t state); |
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196 static pci_ers_result_t e1000_io_slot_reset(struct pci_dev *pdev); |
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197 static void e1000_io_resume(struct pci_dev *pdev); |
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198 |
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199 static struct pci_error_handlers e1000_err_handler = { |
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200 .error_detected = e1000_io_error_detected, |
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201 .slot_reset = e1000_io_slot_reset, |
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202 .resume = e1000_io_resume, |
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203 }; |
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204 |
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205 static struct pci_driver e1000_driver = { |
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206 .name = e1000_driver_name, |
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207 .id_table = e1000_pci_tbl, |
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208 .probe = e1000_probe, |
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209 .remove = __devexit_p(e1000_remove), |
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210 #ifdef CONFIG_PM |
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211 /* Power Management Hooks */ |
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212 .suspend = e1000_suspend, |
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213 .resume = e1000_resume, |
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214 #endif |
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215 .shutdown = e1000_shutdown, |
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216 .err_handler = &e1000_err_handler |
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217 }; |
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218 |
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219 MODULE_AUTHOR("Florian Pose <fp@igh-essen.com>"); |
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220 MODULE_DESCRIPTION("EtherCAT-capable Intel(R) PRO/1000 Network Driver"); |
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221 MODULE_LICENSE("GPL"); |
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222 MODULE_VERSION(DRV_VERSION); |
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223 |
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224 #define DEFAULT_MSG_ENABLE (NETIF_MSG_DRV|NETIF_MSG_PROBE|NETIF_MSG_LINK) |
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225 static int debug = -1; |
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226 module_param(debug, int, 0); |
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227 MODULE_PARM_DESC(debug, "Debug level (0=none,...,16=all)"); |
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228 |
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229 /** |
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230 * e1000_get_hw_dev - return device |
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231 * used by hardware layer to print debugging information |
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232 * |
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233 **/ |
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234 struct net_device *e1000_get_hw_dev(struct e1000_hw *hw) |
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235 { |
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236 struct e1000_adapter *adapter = hw->back; |
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237 return adapter->netdev; |
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238 } |
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239 |
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240 /** |
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241 * e1000_init_module - Driver Registration Routine |
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242 * |
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243 * e1000_init_module is the first routine called when the driver is |
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244 * loaded. All it does is register with the PCI subsystem. |
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245 **/ |
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246 |
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247 static int __init e1000_init_module(void) |
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248 { |
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249 int ret; |
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250 pr_info("%s - version %s\n", e1000_driver_string, e1000_driver_version); |
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251 |
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252 pr_info("%s\n", e1000_copyright); |
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253 |
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254 ret = pci_register_driver(&e1000_driver); |
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255 if (copybreak != COPYBREAK_DEFAULT) { |
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256 if (copybreak == 0) |
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257 pr_info("copybreak disabled\n"); |
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258 else |
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259 pr_info("copybreak enabled for " |
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260 "packets <= %u bytes\n", copybreak); |
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261 } |
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262 return ret; |
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263 } |
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264 |
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265 module_init(e1000_init_module); |
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266 |
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267 /** |
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268 * e1000_exit_module - Driver Exit Cleanup Routine |
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269 * |
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270 * e1000_exit_module is called just before the driver is removed |
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271 * from memory. |
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272 **/ |
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273 |
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274 static void __exit e1000_exit_module(void) |
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275 { |
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276 pci_unregister_driver(&e1000_driver); |
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277 } |
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278 |
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279 module_exit(e1000_exit_module); |
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280 |
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281 static int e1000_request_irq(struct e1000_adapter *adapter) |
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282 { |
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283 struct net_device *netdev = adapter->netdev; |
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284 irq_handler_t handler = e1000_intr; |
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285 int irq_flags = IRQF_SHARED; |
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286 int err; |
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287 |
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288 if (adapter->ecdev) { |
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289 return 0; |
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290 } |
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291 |
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292 err = request_irq(adapter->pdev->irq, handler, irq_flags, netdev->name, |
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293 netdev); |
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294 if (err) { |
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295 e_err(probe, "Unable to allocate interrupt Error: %d\n", err); |
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296 } |
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297 |
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298 return err; |
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299 } |
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300 |
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301 static void e1000_free_irq(struct e1000_adapter *adapter) |
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302 { |
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303 struct net_device *netdev = adapter->netdev; |
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304 |
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305 if (adapter->ecdev) { |
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306 return; |
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307 } |
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308 |
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309 free_irq(adapter->pdev->irq, netdev); |
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310 } |
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311 |
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312 /** |
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313 * e1000_irq_disable - Mask off interrupt generation on the NIC |
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314 * @adapter: board private structure |
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315 **/ |
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316 |
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317 static void e1000_irq_disable(struct e1000_adapter *adapter) |
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318 { |
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319 struct e1000_hw *hw = &adapter->hw; |
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320 |
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321 if (adapter->ecdev) { |
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322 return; |
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323 } |
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324 |
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325 ew32(IMC, ~0); |
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326 E1000_WRITE_FLUSH(); |
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327 synchronize_irq(adapter->pdev->irq); |
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328 } |
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329 |
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330 /** |
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331 * e1000_irq_enable - Enable default interrupt generation settings |
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332 * @adapter: board private structure |
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333 **/ |
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334 |
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335 static void e1000_irq_enable(struct e1000_adapter *adapter) |
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336 { |
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337 struct e1000_hw *hw = &adapter->hw; |
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338 |
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339 if (adapter->ecdev) { |
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340 return; |
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341 } |
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342 |
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343 ew32(IMS, IMS_ENABLE_MASK); |
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344 E1000_WRITE_FLUSH(); |
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345 } |
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346 |
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347 static void e1000_update_mng_vlan(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 struct net_device *netdev = adapter->netdev; |
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351 u16 vid = hw->mng_cookie.vlan_id; |
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352 u16 old_vid = adapter->mng_vlan_id; |
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353 |
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354 if (!e1000_vlan_used(adapter)) |
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355 return; |
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356 |
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357 if (!test_bit(vid, adapter->active_vlans)) { |
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358 if (hw->mng_cookie.status & |
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359 E1000_MNG_DHCP_COOKIE_STATUS_VLAN_SUPPORT) { |
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360 e1000_vlan_rx_add_vid(netdev, vid); |
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361 adapter->mng_vlan_id = vid; |
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362 } else { |
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363 adapter->mng_vlan_id = E1000_MNG_VLAN_NONE; |
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364 } |
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365 if ((old_vid != (u16)E1000_MNG_VLAN_NONE) && |
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366 (vid != old_vid) && |
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367 !test_bit(old_vid, adapter->active_vlans)) |
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368 e1000_vlan_rx_kill_vid(netdev, old_vid); |
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369 } else { |
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370 adapter->mng_vlan_id = vid; |
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371 } |
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372 } |
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373 |
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374 static void e1000_init_manageability(struct e1000_adapter *adapter) |
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375 { |
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376 struct e1000_hw *hw = &adapter->hw; |
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377 |
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378 if (adapter->en_mng_pt) { |
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379 u32 manc = er32(MANC); |
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380 |
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381 /* disable hardware interception of ARP */ |
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382 manc &= ~(E1000_MANC_ARP_EN); |
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383 |
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384 ew32(MANC, manc); |
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385 } |
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386 } |
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387 |
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388 static void e1000_release_manageability(struct e1000_adapter *adapter) |
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389 { |
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390 struct e1000_hw *hw = &adapter->hw; |
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391 |
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392 if (adapter->en_mng_pt) { |
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393 u32 manc = er32(MANC); |
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394 |
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395 /* re-enable hardware interception of ARP */ |
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396 manc |= E1000_MANC_ARP_EN; |
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397 |
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398 ew32(MANC, manc); |
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399 } |
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400 } |
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401 |
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402 /** |
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403 * e1000_configure - configure the hardware for RX and TX |
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404 * @adapter = private board structure |
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405 **/ |
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406 static void e1000_configure(struct e1000_adapter *adapter) |
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407 { |
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408 struct net_device *netdev = adapter->netdev; |
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409 int i; |
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410 |
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411 e1000_set_rx_mode(netdev); |
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412 |
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413 e1000_restore_vlan(adapter); |
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414 e1000_init_manageability(adapter); |
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415 |
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416 e1000_configure_tx(adapter); |
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417 e1000_setup_rctl(adapter); |
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418 e1000_configure_rx(adapter); |
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419 /* call E1000_DESC_UNUSED which always leaves |
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420 * at least 1 descriptor unused to make sure |
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421 * next_to_use != next_to_clean */ |
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422 for (i = 0; i < adapter->num_rx_queues; i++) { |
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423 struct e1000_rx_ring *ring = &adapter->rx_ring[i]; |
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424 if (adapter->ecdev) { |
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425 /* fill rx ring completely! */ |
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426 adapter->alloc_rx_buf(adapter, ring, ring->count); |
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427 } else { |
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428 /* this one leaves the last ring element unallocated! */ |
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429 adapter->alloc_rx_buf(adapter, ring, |
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430 E1000_DESC_UNUSED(ring)); |
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431 } |
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432 } |
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433 } |
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434 |
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435 int e1000_up(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 /* hardware has been reset, we need to reload some things */ |
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440 e1000_configure(adapter); |
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441 |
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442 clear_bit(__E1000_DOWN, &adapter->flags); |
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443 |
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444 if (!adapter->ecdev) { |
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445 napi_enable(&adapter->napi); |
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446 |
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447 e1000_irq_enable(adapter); |
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448 |
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449 netif_wake_queue(adapter->netdev); |
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450 |
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451 /* fire a link change interrupt to start the watchdog */ |
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452 ew32(ICS, E1000_ICS_LSC); |
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453 } |
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454 return 0; |
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455 } |
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456 |
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457 /** |
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458 * e1000_power_up_phy - restore link in case the phy was powered down |
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459 * @adapter: address of board private structure |
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460 * |
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461 * The phy may be powered down to save power and turn off link when the |
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462 * driver is unloaded and wake on lan is not enabled (among others) |
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463 * *** this routine MUST be followed by a call to e1000_reset *** |
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464 * |
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465 **/ |
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466 |
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467 void e1000_power_up_phy(struct e1000_adapter *adapter) |
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468 { |
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469 struct e1000_hw *hw = &adapter->hw; |
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470 u16 mii_reg = 0; |
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471 |
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472 /* Just clear the power down bit to wake the phy back up */ |
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473 if (hw->media_type == e1000_media_type_copper) { |
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474 /* according to the manual, the phy will retain its |
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475 * settings across a power-down/up cycle */ |
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476 e1000_read_phy_reg(hw, PHY_CTRL, &mii_reg); |
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477 mii_reg &= ~MII_CR_POWER_DOWN; |
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478 e1000_write_phy_reg(hw, PHY_CTRL, mii_reg); |
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479 } |
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480 } |
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481 |
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482 static void e1000_power_down_phy(struct e1000_adapter *adapter) |
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483 { |
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484 struct e1000_hw *hw = &adapter->hw; |
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485 |
|
486 /* Power down the PHY so no link is implied when interface is down * |
|
487 * The PHY cannot be powered down if any of the following is true * |
|
488 * (a) WoL is enabled |
|
489 * (b) AMT is active |
|
490 * (c) SoL/IDER session is active */ |
|
491 if (!adapter->wol && hw->mac_type >= e1000_82540 && |
|
492 hw->media_type == e1000_media_type_copper) { |
|
493 u16 mii_reg = 0; |
|
494 |
|
495 switch (hw->mac_type) { |
|
496 case e1000_82540: |
|
497 case e1000_82545: |
|
498 case e1000_82545_rev_3: |
|
499 case e1000_82546: |
|
500 case e1000_ce4100: |
|
501 case e1000_82546_rev_3: |
|
502 case e1000_82541: |
|
503 case e1000_82541_rev_2: |
|
504 case e1000_82547: |
|
505 case e1000_82547_rev_2: |
|
506 if (er32(MANC) & E1000_MANC_SMBUS_EN) |
|
507 goto out; |
|
508 break; |
|
509 default: |
|
510 goto out; |
|
511 } |
|
512 e1000_read_phy_reg(hw, PHY_CTRL, &mii_reg); |
|
513 mii_reg |= MII_CR_POWER_DOWN; |
|
514 e1000_write_phy_reg(hw, PHY_CTRL, mii_reg); |
|
515 msleep(1); |
|
516 } |
|
517 out: |
|
518 return; |
|
519 } |
|
520 |
|
521 static void e1000_down_and_stop(struct e1000_adapter *adapter) |
|
522 { |
|
523 set_bit(__E1000_DOWN, &adapter->flags); |
|
524 |
|
525 /* Only kill reset task if adapter is not resetting */ |
|
526 if (!test_bit(__E1000_RESETTING, &adapter->flags)) |
|
527 cancel_work_sync(&adapter->reset_task); |
|
528 |
|
529 if (!adapter->ecdev) { |
|
530 cancel_delayed_work_sync(&adapter->watchdog_task); |
|
531 cancel_delayed_work_sync(&adapter->phy_info_task); |
|
532 cancel_delayed_work_sync(&adapter->fifo_stall_task); |
|
533 } |
|
534 } |
|
535 |
|
536 void e1000_down(struct e1000_adapter *adapter) |
|
537 { |
|
538 struct e1000_hw *hw = &adapter->hw; |
|
539 struct net_device *netdev = adapter->netdev; |
|
540 u32 rctl, tctl; |
|
541 |
|
542 |
|
543 /* disable receives in the hardware */ |
|
544 rctl = er32(RCTL); |
|
545 ew32(RCTL, rctl & ~E1000_RCTL_EN); |
|
546 |
|
547 if (!adapter->ecdev) { |
|
548 /* flush and sleep below */ |
|
549 netif_tx_disable(netdev); |
|
550 } |
|
551 |
|
552 /* disable transmits in the hardware */ |
|
553 tctl = er32(TCTL); |
|
554 tctl &= ~E1000_TCTL_EN; |
|
555 ew32(TCTL, tctl); |
|
556 /* flush both disables and wait for them to finish */ |
|
557 E1000_WRITE_FLUSH(); |
|
558 msleep(10); |
|
559 |
|
560 if (!adapter->ecdev) { |
|
561 napi_disable(&adapter->napi); |
|
562 |
|
563 e1000_irq_disable(adapter); |
|
564 } |
|
565 |
|
566 /* |
|
567 * Setting DOWN must be after irq_disable to prevent |
|
568 * a screaming interrupt. Setting DOWN also prevents |
|
569 * tasks from rescheduling. |
|
570 */ |
|
571 e1000_down_and_stop(adapter); |
|
572 |
|
573 adapter->link_speed = 0; |
|
574 adapter->link_duplex = 0; |
|
575 |
|
576 if (!adapter->ecdev) { |
|
577 netif_carrier_off(netdev); |
|
578 } |
|
579 |
|
580 e1000_reset(adapter); |
|
581 e1000_clean_all_tx_rings(adapter); |
|
582 e1000_clean_all_rx_rings(adapter); |
|
583 } |
|
584 |
|
585 static void e1000_reinit_safe(struct e1000_adapter *adapter) |
|
586 { |
|
587 while (test_and_set_bit(__E1000_RESETTING, &adapter->flags)) |
|
588 msleep(1); |
|
589 mutex_lock(&adapter->mutex); |
|
590 e1000_down(adapter); |
|
591 e1000_up(adapter); |
|
592 mutex_unlock(&adapter->mutex); |
|
593 clear_bit(__E1000_RESETTING, &adapter->flags); |
|
594 } |
|
595 |
|
596 void e1000_reinit_locked(struct e1000_adapter *adapter) |
|
597 { |
|
598 /* if rtnl_lock is not held the call path is bogus */ |
|
599 ASSERT_RTNL(); |
|
600 WARN_ON(in_interrupt()); |
|
601 while (test_and_set_bit(__E1000_RESETTING, &adapter->flags)) |
|
602 msleep(1); |
|
603 e1000_down(adapter); |
|
604 e1000_up(adapter); |
|
605 clear_bit(__E1000_RESETTING, &adapter->flags); |
|
606 } |
|
607 |
|
608 void e1000_reset(struct e1000_adapter *adapter) |
|
609 { |
|
610 struct e1000_hw *hw = &adapter->hw; |
|
611 u32 pba = 0, tx_space, min_tx_space, min_rx_space; |
|
612 bool legacy_pba_adjust = false; |
|
613 u16 hwm; |
|
614 |
|
615 /* Repartition Pba for greater than 9k mtu |
|
616 * To take effect CTRL.RST is required. |
|
617 */ |
|
618 |
|
619 switch (hw->mac_type) { |
|
620 case e1000_82542_rev2_0: |
|
621 case e1000_82542_rev2_1: |
|
622 case e1000_82543: |
|
623 case e1000_82544: |
|
624 case e1000_82540: |
|
625 case e1000_82541: |
|
626 case e1000_82541_rev_2: |
|
627 legacy_pba_adjust = true; |
|
628 pba = E1000_PBA_48K; |
|
629 break; |
|
630 case e1000_82545: |
|
631 case e1000_82545_rev_3: |
|
632 case e1000_82546: |
|
633 case e1000_ce4100: |
|
634 case e1000_82546_rev_3: |
|
635 pba = E1000_PBA_48K; |
|
636 break; |
|
637 case e1000_82547: |
|
638 case e1000_82547_rev_2: |
|
639 legacy_pba_adjust = true; |
|
640 pba = E1000_PBA_30K; |
|
641 break; |
|
642 case e1000_undefined: |
|
643 case e1000_num_macs: |
|
644 break; |
|
645 } |
|
646 |
|
647 if (legacy_pba_adjust) { |
|
648 if (hw->max_frame_size > E1000_RXBUFFER_8192) |
|
649 pba -= 8; /* allocate more FIFO for Tx */ |
|
650 |
|
651 if (hw->mac_type == e1000_82547) { |
|
652 adapter->tx_fifo_head = 0; |
|
653 adapter->tx_head_addr = pba << E1000_TX_HEAD_ADDR_SHIFT; |
|
654 adapter->tx_fifo_size = |
|
655 (E1000_PBA_40K - pba) << E1000_PBA_BYTES_SHIFT; |
|
656 atomic_set(&adapter->tx_fifo_stall, 0); |
|
657 } |
|
658 } else if (hw->max_frame_size > ETH_FRAME_LEN + ETH_FCS_LEN) { |
|
659 /* adjust PBA for jumbo frames */ |
|
660 ew32(PBA, pba); |
|
661 |
|
662 /* To maintain wire speed transmits, the Tx FIFO should be |
|
663 * large enough to accommodate two full transmit packets, |
|
664 * rounded up to the next 1KB and expressed in KB. Likewise, |
|
665 * the Rx FIFO should be large enough to accommodate at least |
|
666 * one full receive packet and is similarly rounded up and |
|
667 * expressed in KB. */ |
|
668 pba = er32(PBA); |
|
669 /* upper 16 bits has Tx packet buffer allocation size in KB */ |
|
670 tx_space = pba >> 16; |
|
671 /* lower 16 bits has Rx packet buffer allocation size in KB */ |
|
672 pba &= 0xffff; |
|
673 /* |
|
674 * the tx fifo also stores 16 bytes of information about the tx |
|
675 * but don't include ethernet FCS because hardware appends it |
|
676 */ |
|
677 min_tx_space = (hw->max_frame_size + |
|
678 sizeof(struct e1000_tx_desc) - |
|
679 ETH_FCS_LEN) * 2; |
|
680 min_tx_space = ALIGN(min_tx_space, 1024); |
|
681 min_tx_space >>= 10; |
|
682 /* software strips receive CRC, so leave room for it */ |
|
683 min_rx_space = hw->max_frame_size; |
|
684 min_rx_space = ALIGN(min_rx_space, 1024); |
|
685 min_rx_space >>= 10; |
|
686 |
|
687 /* If current Tx allocation is less than the min Tx FIFO size, |
|
688 * and the min Tx FIFO size is less than the current Rx FIFO |
|
689 * allocation, take space away from current Rx allocation */ |
|
690 if (tx_space < min_tx_space && |
|
691 ((min_tx_space - tx_space) < pba)) { |
|
692 pba = pba - (min_tx_space - tx_space); |
|
693 |
|
694 /* PCI/PCIx hardware has PBA alignment constraints */ |
|
695 switch (hw->mac_type) { |
|
696 case e1000_82545 ... e1000_82546_rev_3: |
|
697 pba &= ~(E1000_PBA_8K - 1); |
|
698 break; |
|
699 default: |
|
700 break; |
|
701 } |
|
702 |
|
703 /* if short on rx space, rx wins and must trump tx |
|
704 * adjustment or use Early Receive if available */ |
|
705 if (pba < min_rx_space) |
|
706 pba = min_rx_space; |
|
707 } |
|
708 } |
|
709 |
|
710 ew32(PBA, pba); |
|
711 |
|
712 /* |
|
713 * flow control settings: |
|
714 * The high water mark must be low enough to fit one full frame |
|
715 * (or the size used for early receive) above it in the Rx FIFO. |
|
716 * Set it to the lower of: |
|
717 * - 90% of the Rx FIFO size, and |
|
718 * - the full Rx FIFO size minus the early receive size (for parts |
|
719 * with ERT support assuming ERT set to E1000_ERT_2048), or |
|
720 * - the full Rx FIFO size minus one full frame |
|
721 */ |
|
722 hwm = min(((pba << 10) * 9 / 10), |
|
723 ((pba << 10) - hw->max_frame_size)); |
|
724 |
|
725 hw->fc_high_water = hwm & 0xFFF8; /* 8-byte granularity */ |
|
726 hw->fc_low_water = hw->fc_high_water - 8; |
|
727 hw->fc_pause_time = E1000_FC_PAUSE_TIME; |
|
728 hw->fc_send_xon = 1; |
|
729 hw->fc = hw->original_fc; |
|
730 |
|
731 /* Allow time for pending master requests to run */ |
|
732 e1000_reset_hw(hw); |
|
733 if (hw->mac_type >= e1000_82544) |
|
734 ew32(WUC, 0); |
|
735 |
|
736 if (e1000_init_hw(hw)) |
|
737 e_dev_err("Hardware Error\n"); |
|
738 e1000_update_mng_vlan(adapter); |
|
739 |
|
740 /* if (adapter->hwflags & HWFLAGS_PHY_PWR_BIT) { */ |
|
741 if (hw->mac_type >= e1000_82544 && |
|
742 hw->autoneg == 1 && |
|
743 hw->autoneg_advertised == ADVERTISE_1000_FULL) { |
|
744 u32 ctrl = er32(CTRL); |
|
745 /* clear phy power management bit if we are in gig only mode, |
|
746 * which if enabled will attempt negotiation to 100Mb, which |
|
747 * can cause a loss of link at power off or driver unload */ |
|
748 ctrl &= ~E1000_CTRL_SWDPIN3; |
|
749 ew32(CTRL, ctrl); |
|
750 } |
|
751 |
|
752 /* Enable h/w to recognize an 802.1Q VLAN Ethernet packet */ |
|
753 ew32(VET, ETHERNET_IEEE_VLAN_TYPE); |
|
754 |
|
755 e1000_reset_adaptive(hw); |
|
756 e1000_phy_get_info(hw, &adapter->phy_info); |
|
757 |
|
758 e1000_release_manageability(adapter); |
|
759 } |
|
760 |
|
761 /** |
|
762 * Dump the eeprom for users having checksum issues |
|
763 **/ |
|
764 static void e1000_dump_eeprom(struct e1000_adapter *adapter) |
|
765 { |
|
766 struct net_device *netdev = adapter->netdev; |
|
767 struct ethtool_eeprom eeprom; |
|
768 const struct ethtool_ops *ops = netdev->ethtool_ops; |
|
769 u8 *data; |
|
770 int i; |
|
771 u16 csum_old, csum_new = 0; |
|
772 |
|
773 eeprom.len = ops->get_eeprom_len(netdev); |
|
774 eeprom.offset = 0; |
|
775 |
|
776 data = kmalloc(eeprom.len, GFP_KERNEL); |
|
777 if (!data) |
|
778 return; |
|
779 |
|
780 ops->get_eeprom(netdev, &eeprom, data); |
|
781 |
|
782 csum_old = (data[EEPROM_CHECKSUM_REG * 2]) + |
|
783 (data[EEPROM_CHECKSUM_REG * 2 + 1] << 8); |
|
784 for (i = 0; i < EEPROM_CHECKSUM_REG * 2; i += 2) |
|
785 csum_new += data[i] + (data[i + 1] << 8); |
|
786 csum_new = EEPROM_SUM - csum_new; |
|
787 |
|
788 pr_err("/*********************/\n"); |
|
789 pr_err("Current EEPROM Checksum : 0x%04x\n", csum_old); |
|
790 pr_err("Calculated : 0x%04x\n", csum_new); |
|
791 |
|
792 pr_err("Offset Values\n"); |
|
793 pr_err("======== ======\n"); |
|
794 print_hex_dump(KERN_ERR, "", DUMP_PREFIX_OFFSET, 16, 1, data, 128, 0); |
|
795 |
|
796 pr_err("Include this output when contacting your support provider.\n"); |
|
797 pr_err("This is not a software error! Something bad happened to\n"); |
|
798 pr_err("your hardware or EEPROM image. Ignoring this problem could\n"); |
|
799 pr_err("result in further problems, possibly loss of data,\n"); |
|
800 pr_err("corruption or system hangs!\n"); |
|
801 pr_err("The MAC Address will be reset to 00:00:00:00:00:00,\n"); |
|
802 pr_err("which is invalid and requires you to set the proper MAC\n"); |
|
803 pr_err("address manually before continuing to enable this network\n"); |
|
804 pr_err("device. Please inspect the EEPROM dump and report the\n"); |
|
805 pr_err("issue to your hardware vendor or Intel Customer Support.\n"); |
|
806 pr_err("/*********************/\n"); |
|
807 |
|
808 kfree(data); |
|
809 } |
|
810 |
|
811 /** |
|
812 * e1000_is_need_ioport - determine if an adapter needs ioport resources or not |
|
813 * @pdev: PCI device information struct |
|
814 * |
|
815 * Return true if an adapter needs ioport resources |
|
816 **/ |
|
817 static int e1000_is_need_ioport(struct pci_dev *pdev) |
|
818 { |
|
819 switch (pdev->device) { |
|
820 case E1000_DEV_ID_82540EM: |
|
821 case E1000_DEV_ID_82540EM_LOM: |
|
822 case E1000_DEV_ID_82540EP: |
|
823 case E1000_DEV_ID_82540EP_LOM: |
|
824 case E1000_DEV_ID_82540EP_LP: |
|
825 case E1000_DEV_ID_82541EI: |
|
826 case E1000_DEV_ID_82541EI_MOBILE: |
|
827 case E1000_DEV_ID_82541ER: |
|
828 case E1000_DEV_ID_82541ER_LOM: |
|
829 case E1000_DEV_ID_82541GI: |
|
830 case E1000_DEV_ID_82541GI_LF: |
|
831 case E1000_DEV_ID_82541GI_MOBILE: |
|
832 case E1000_DEV_ID_82544EI_COPPER: |
|
833 case E1000_DEV_ID_82544EI_FIBER: |
|
834 case E1000_DEV_ID_82544GC_COPPER: |
|
835 case E1000_DEV_ID_82544GC_LOM: |
|
836 case E1000_DEV_ID_82545EM_COPPER: |
|
837 case E1000_DEV_ID_82545EM_FIBER: |
|
838 case E1000_DEV_ID_82546EB_COPPER: |
|
839 case E1000_DEV_ID_82546EB_FIBER: |
|
840 case E1000_DEV_ID_82546EB_QUAD_COPPER: |
|
841 return true; |
|
842 default: |
|
843 return false; |
|
844 } |
|
845 } |
|
846 |
|
847 static netdev_features_t e1000_fix_features(struct net_device *netdev, |
|
848 netdev_features_t features) |
|
849 { |
|
850 /* |
|
851 * Since there is no support for separate rx/tx vlan accel |
|
852 * enable/disable make sure tx flag is always in same state as rx. |
|
853 */ |
|
854 if (features & NETIF_F_HW_VLAN_RX) |
|
855 features |= NETIF_F_HW_VLAN_TX; |
|
856 else |
|
857 features &= ~NETIF_F_HW_VLAN_TX; |
|
858 |
|
859 return features; |
|
860 } |
|
861 |
|
862 static int e1000_set_features(struct net_device *netdev, |
|
863 netdev_features_t features) |
|
864 { |
|
865 struct e1000_adapter *adapter = netdev_priv(netdev); |
|
866 netdev_features_t changed = features ^ netdev->features; |
|
867 |
|
868 if (changed & NETIF_F_HW_VLAN_RX) |
|
869 e1000_vlan_mode(netdev, features); |
|
870 |
|
871 if (!(changed & NETIF_F_RXCSUM)) |
|
872 return 0; |
|
873 |
|
874 adapter->rx_csum = !!(features & NETIF_F_RXCSUM); |
|
875 |
|
876 if (netif_running(netdev)) |
|
877 e1000_reinit_locked(adapter); |
|
878 else |
|
879 e1000_reset(adapter); |
|
880 |
|
881 return 0; |
|
882 } |
|
883 |
|
884 static const struct net_device_ops e1000_netdev_ops = { |
|
885 .ndo_open = e1000_open, |
|
886 .ndo_stop = e1000_close, |
|
887 .ndo_start_xmit = e1000_xmit_frame, |
|
888 .ndo_get_stats = e1000_get_stats, |
|
889 .ndo_set_rx_mode = e1000_set_rx_mode, |
|
890 .ndo_set_mac_address = e1000_set_mac, |
|
891 .ndo_tx_timeout = e1000_tx_timeout, |
|
892 .ndo_change_mtu = e1000_change_mtu, |
|
893 .ndo_do_ioctl = e1000_ioctl, |
|
894 .ndo_validate_addr = eth_validate_addr, |
|
895 .ndo_vlan_rx_add_vid = e1000_vlan_rx_add_vid, |
|
896 .ndo_vlan_rx_kill_vid = e1000_vlan_rx_kill_vid, |
|
897 #ifdef CONFIG_NET_POLL_CONTROLLER |
|
898 .ndo_poll_controller = e1000_netpoll, |
|
899 #endif |
|
900 .ndo_fix_features = e1000_fix_features, |
|
901 .ndo_set_features = e1000_set_features, |
|
902 }; |
|
903 |
|
904 /** |
|
905 * e1000_init_hw_struct - initialize members of hw struct |
|
906 * @adapter: board private struct |
|
907 * @hw: structure used by e1000_hw.c |
|
908 * |
|
909 * Factors out initialization of the e1000_hw struct to its own function |
|
910 * that can be called very early at init (just after struct allocation). |
|
911 * Fields are initialized based on PCI device information and |
|
912 * OS network device settings (MTU size). |
|
913 * Returns negative error codes if MAC type setup fails. |
|
914 */ |
|
915 static int e1000_init_hw_struct(struct e1000_adapter *adapter, |
|
916 struct e1000_hw *hw) |
|
917 { |
|
918 struct pci_dev *pdev = adapter->pdev; |
|
919 |
|
920 /* PCI config space info */ |
|
921 hw->vendor_id = pdev->vendor; |
|
922 hw->device_id = pdev->device; |
|
923 hw->subsystem_vendor_id = pdev->subsystem_vendor; |
|
924 hw->subsystem_id = pdev->subsystem_device; |
|
925 hw->revision_id = pdev->revision; |
|
926 |
|
927 pci_read_config_word(pdev, PCI_COMMAND, &hw->pci_cmd_word); |
|
928 |
|
929 hw->max_frame_size = adapter->netdev->mtu + |
|
930 ENET_HEADER_SIZE + ETHERNET_FCS_SIZE; |
|
931 hw->min_frame_size = MINIMUM_ETHERNET_FRAME_SIZE; |
|
932 |
|
933 /* identify the MAC */ |
|
934 if (e1000_set_mac_type(hw)) { |
|
935 e_err(probe, "Unknown MAC Type\n"); |
|
936 return -EIO; |
|
937 } |
|
938 |
|
939 switch (hw->mac_type) { |
|
940 default: |
|
941 break; |
|
942 case e1000_82541: |
|
943 case e1000_82547: |
|
944 case e1000_82541_rev_2: |
|
945 case e1000_82547_rev_2: |
|
946 hw->phy_init_script = 1; |
|
947 break; |
|
948 } |
|
949 |
|
950 e1000_set_media_type(hw); |
|
951 e1000_get_bus_info(hw); |
|
952 |
|
953 hw->wait_autoneg_complete = false; |
|
954 hw->tbi_compatibility_en = true; |
|
955 hw->adaptive_ifs = true; |
|
956 |
|
957 /* Copper options */ |
|
958 |
|
959 if (hw->media_type == e1000_media_type_copper) { |
|
960 hw->mdix = AUTO_ALL_MODES; |
|
961 hw->disable_polarity_correction = false; |
|
962 hw->master_slave = E1000_MASTER_SLAVE; |
|
963 } |
|
964 |
|
965 return 0; |
|
966 } |
|
967 |
|
968 /** |
|
969 * e1000_probe - Device Initialization Routine |
|
970 * @pdev: PCI device information struct |
|
971 * @ent: entry in e1000_pci_tbl |
|
972 * |
|
973 * Returns 0 on success, negative on failure |
|
974 * |
|
975 * e1000_probe initializes an adapter identified by a pci_dev structure. |
|
976 * The OS initialization, configuring of the adapter private structure, |
|
977 * and a hardware reset occur. |
|
978 **/ |
|
979 static int __devinit e1000_probe(struct pci_dev *pdev, |
|
980 const struct pci_device_id *ent) |
|
981 { |
|
982 struct net_device *netdev; |
|
983 struct e1000_adapter *adapter; |
|
984 struct e1000_hw *hw; |
|
985 |
|
986 static int cards_found = 0; |
|
987 static int global_quad_port_a = 0; /* global ksp3 port a indication */ |
|
988 int i, err, pci_using_dac; |
|
989 u16 eeprom_data = 0; |
|
990 u16 tmp = 0; |
|
991 u16 eeprom_apme_mask = E1000_EEPROM_APME; |
|
992 int bars, need_ioport; |
|
993 |
|
994 /* do not allocate ioport bars when not needed */ |
|
995 need_ioport = e1000_is_need_ioport(pdev); |
|
996 if (need_ioport) { |
|
997 bars = pci_select_bars(pdev, IORESOURCE_MEM | IORESOURCE_IO); |
|
998 err = pci_enable_device(pdev); |
|
999 } else { |
|
1000 bars = pci_select_bars(pdev, IORESOURCE_MEM); |
|
1001 err = pci_enable_device_mem(pdev); |
|
1002 } |
|
1003 if (err) |
|
1004 return err; |
|
1005 |
|
1006 err = pci_request_selected_regions(pdev, bars, e1000_driver_name); |
|
1007 if (err) |
|
1008 goto err_pci_reg; |
|
1009 |
|
1010 pci_set_master(pdev); |
|
1011 err = pci_save_state(pdev); |
|
1012 if (err) |
|
1013 goto err_alloc_etherdev; |
|
1014 |
|
1015 err = -ENOMEM; |
|
1016 netdev = alloc_etherdev(sizeof(struct e1000_adapter)); |
|
1017 if (!netdev) |
|
1018 goto err_alloc_etherdev; |
|
1019 |
|
1020 SET_NETDEV_DEV(netdev, &pdev->dev); |
|
1021 |
|
1022 pci_set_drvdata(pdev, netdev); |
|
1023 adapter = netdev_priv(netdev); |
|
1024 adapter->netdev = netdev; |
|
1025 adapter->pdev = pdev; |
|
1026 adapter->msg_enable = netif_msg_init(debug, DEFAULT_MSG_ENABLE); |
|
1027 adapter->bars = bars; |
|
1028 adapter->need_ioport = need_ioport; |
|
1029 |
|
1030 hw = &adapter->hw; |
|
1031 hw->back = adapter; |
|
1032 |
|
1033 err = -EIO; |
|
1034 hw->hw_addr = pci_ioremap_bar(pdev, BAR_0); |
|
1035 if (!hw->hw_addr) |
|
1036 goto err_ioremap; |
|
1037 |
|
1038 if (adapter->need_ioport) { |
|
1039 for (i = BAR_1; i <= BAR_5; i++) { |
|
1040 if (pci_resource_len(pdev, i) == 0) |
|
1041 continue; |
|
1042 if (pci_resource_flags(pdev, i) & IORESOURCE_IO) { |
|
1043 hw->io_base = pci_resource_start(pdev, i); |
|
1044 break; |
|
1045 } |
|
1046 } |
|
1047 } |
|
1048 |
|
1049 /* make ready for any if (hw->...) below */ |
|
1050 err = e1000_init_hw_struct(adapter, hw); |
|
1051 if (err) |
|
1052 goto err_sw_init; |
|
1053 |
|
1054 /* |
|
1055 * there is a workaround being applied below that limits |
|
1056 * 64-bit DMA addresses to 64-bit hardware. There are some |
|
1057 * 32-bit adapters that Tx hang when given 64-bit DMA addresses |
|
1058 */ |
|
1059 pci_using_dac = 0; |
|
1060 if ((hw->bus_type == e1000_bus_type_pcix) && |
|
1061 !dma_set_mask(&pdev->dev, DMA_BIT_MASK(64))) { |
|
1062 /* |
|
1063 * according to DMA-API-HOWTO, coherent calls will always |
|
1064 * succeed if the set call did |
|
1065 */ |
|
1066 dma_set_coherent_mask(&pdev->dev, DMA_BIT_MASK(64)); |
|
1067 pci_using_dac = 1; |
|
1068 } else { |
|
1069 err = dma_set_mask(&pdev->dev, DMA_BIT_MASK(32)); |
|
1070 if (err) { |
|
1071 pr_err("No usable DMA config, aborting\n"); |
|
1072 goto err_dma; |
|
1073 } |
|
1074 dma_set_coherent_mask(&pdev->dev, DMA_BIT_MASK(32)); |
|
1075 } |
|
1076 |
|
1077 netdev->netdev_ops = &e1000_netdev_ops; |
|
1078 e1000_set_ethtool_ops(netdev); |
|
1079 netdev->watchdog_timeo = 5 * HZ; |
|
1080 netif_napi_add(netdev, &adapter->napi, e1000_clean, 64); |
|
1081 |
|
1082 strncpy(netdev->name, pci_name(pdev), sizeof(netdev->name) - 1); |
|
1083 |
|
1084 adapter->bd_number = cards_found; |
|
1085 |
|
1086 /* setup the private structure */ |
|
1087 |
|
1088 err = e1000_sw_init(adapter); |
|
1089 if (err) |
|
1090 goto err_sw_init; |
|
1091 |
|
1092 err = -EIO; |
|
1093 if (hw->mac_type == e1000_ce4100) { |
|
1094 hw->ce4100_gbe_mdio_base_virt = |
|
1095 ioremap(pci_resource_start(pdev, BAR_1), |
|
1096 pci_resource_len(pdev, BAR_1)); |
|
1097 |
|
1098 if (!hw->ce4100_gbe_mdio_base_virt) |
|
1099 goto err_mdio_ioremap; |
|
1100 } |
|
1101 |
|
1102 if (hw->mac_type >= e1000_82543) { |
|
1103 netdev->hw_features = NETIF_F_SG | |
|
1104 NETIF_F_HW_CSUM | |
|
1105 NETIF_F_HW_VLAN_RX; |
|
1106 netdev->features = NETIF_F_HW_VLAN_TX | |
|
1107 NETIF_F_HW_VLAN_FILTER; |
|
1108 } |
|
1109 |
|
1110 if ((hw->mac_type >= e1000_82544) && |
|
1111 (hw->mac_type != e1000_82547)) |
|
1112 netdev->hw_features |= NETIF_F_TSO; |
|
1113 |
|
1114 netdev->priv_flags |= IFF_SUPP_NOFCS; |
|
1115 |
|
1116 netdev->features |= netdev->hw_features; |
|
1117 netdev->hw_features |= NETIF_F_RXCSUM; |
|
1118 netdev->hw_features |= NETIF_F_RXFCS; |
|
1119 |
|
1120 if (pci_using_dac) { |
|
1121 netdev->features |= NETIF_F_HIGHDMA; |
|
1122 netdev->vlan_features |= NETIF_F_HIGHDMA; |
|
1123 } |
|
1124 |
|
1125 netdev->vlan_features |= NETIF_F_TSO; |
|
1126 netdev->vlan_features |= NETIF_F_HW_CSUM; |
|
1127 netdev->vlan_features |= NETIF_F_SG; |
|
1128 |
|
1129 netdev->priv_flags |= IFF_UNICAST_FLT; |
|
1130 |
|
1131 adapter->en_mng_pt = e1000_enable_mng_pass_thru(hw); |
|
1132 |
|
1133 /* initialize eeprom parameters */ |
|
1134 if (e1000_init_eeprom_params(hw)) { |
|
1135 e_err(probe, "EEPROM initialization failed\n"); |
|
1136 goto err_eeprom; |
|
1137 } |
|
1138 |
|
1139 /* before reading the EEPROM, reset the controller to |
|
1140 * put the device in a known good starting state */ |
|
1141 |
|
1142 e1000_reset_hw(hw); |
|
1143 |
|
1144 /* make sure the EEPROM is good */ |
|
1145 if (e1000_validate_eeprom_checksum(hw) < 0) { |
|
1146 e_err(probe, "The EEPROM Checksum Is Not Valid\n"); |
|
1147 e1000_dump_eeprom(adapter); |
|
1148 /* |
|
1149 * set MAC address to all zeroes to invalidate and temporary |
|
1150 * disable this device for the user. This blocks regular |
|
1151 * traffic while still permitting ethtool ioctls from reaching |
|
1152 * the hardware as well as allowing the user to run the |
|
1153 * interface after manually setting a hw addr using |
|
1154 * `ip set address` |
|
1155 */ |
|
1156 memset(hw->mac_addr, 0, netdev->addr_len); |
|
1157 } else { |
|
1158 /* copy the MAC address out of the EEPROM */ |
|
1159 if (e1000_read_mac_addr(hw)) |
|
1160 e_err(probe, "EEPROM Read Error\n"); |
|
1161 } |
|
1162 /* don't block initalization here due to bad MAC address */ |
|
1163 memcpy(netdev->dev_addr, hw->mac_addr, netdev->addr_len); |
|
1164 memcpy(netdev->perm_addr, hw->mac_addr, netdev->addr_len); |
|
1165 |
|
1166 if (!is_valid_ether_addr(netdev->perm_addr)) |
|
1167 e_err(probe, "Invalid MAC Address\n"); |
|
1168 |
|
1169 |
|
1170 INIT_DELAYED_WORK(&adapter->watchdog_task, e1000_watchdog); |
|
1171 INIT_DELAYED_WORK(&adapter->fifo_stall_task, |
|
1172 e1000_82547_tx_fifo_stall_task); |
|
1173 INIT_DELAYED_WORK(&adapter->phy_info_task, e1000_update_phy_info_task); |
|
1174 INIT_WORK(&adapter->reset_task, e1000_reset_task); |
|
1175 |
|
1176 e1000_check_options(adapter); |
|
1177 |
|
1178 /* Initial Wake on LAN setting |
|
1179 * If APM wake is enabled in the EEPROM, |
|
1180 * enable the ACPI Magic Packet filter |
|
1181 */ |
|
1182 |
|
1183 switch (hw->mac_type) { |
|
1184 case e1000_82542_rev2_0: |
|
1185 case e1000_82542_rev2_1: |
|
1186 case e1000_82543: |
|
1187 break; |
|
1188 case e1000_82544: |
|
1189 e1000_read_eeprom(hw, |
|
1190 EEPROM_INIT_CONTROL2_REG, 1, &eeprom_data); |
|
1191 eeprom_apme_mask = E1000_EEPROM_82544_APM; |
|
1192 break; |
|
1193 case e1000_82546: |
|
1194 case e1000_82546_rev_3: |
|
1195 if (er32(STATUS) & E1000_STATUS_FUNC_1){ |
|
1196 e1000_read_eeprom(hw, |
|
1197 EEPROM_INIT_CONTROL3_PORT_B, 1, &eeprom_data); |
|
1198 break; |
|
1199 } |
|
1200 /* Fall Through */ |
|
1201 default: |
|
1202 e1000_read_eeprom(hw, |
|
1203 EEPROM_INIT_CONTROL3_PORT_A, 1, &eeprom_data); |
|
1204 break; |
|
1205 } |
|
1206 if (eeprom_data & eeprom_apme_mask) |
|
1207 adapter->eeprom_wol |= E1000_WUFC_MAG; |
|
1208 |
|
1209 /* now that we have the eeprom settings, apply the special cases |
|
1210 * where the eeprom may be wrong or the board simply won't support |
|
1211 * wake on lan on a particular port */ |
|
1212 switch (pdev->device) { |
|
1213 case E1000_DEV_ID_82546GB_PCIE: |
|
1214 adapter->eeprom_wol = 0; |
|
1215 break; |
|
1216 case E1000_DEV_ID_82546EB_FIBER: |
|
1217 case E1000_DEV_ID_82546GB_FIBER: |
|
1218 /* Wake events only supported on port A for dual fiber |
|
1219 * regardless of eeprom setting */ |
|
1220 if (er32(STATUS) & E1000_STATUS_FUNC_1) |
|
1221 adapter->eeprom_wol = 0; |
|
1222 break; |
|
1223 case E1000_DEV_ID_82546GB_QUAD_COPPER_KSP3: |
|
1224 /* if quad port adapter, disable WoL on all but port A */ |
|
1225 if (global_quad_port_a != 0) |
|
1226 adapter->eeprom_wol = 0; |
|
1227 else |
|
1228 adapter->quad_port_a = true; |
|
1229 /* Reset for multiple quad port adapters */ |
|
1230 if (++global_quad_port_a == 4) |
|
1231 global_quad_port_a = 0; |
|
1232 break; |
|
1233 } |
|
1234 |
|
1235 /* initialize the wol settings based on the eeprom settings */ |
|
1236 adapter->wol = adapter->eeprom_wol; |
|
1237 device_set_wakeup_enable(&adapter->pdev->dev, adapter->wol); |
|
1238 |
|
1239 /* Auto detect PHY address */ |
|
1240 if (hw->mac_type == e1000_ce4100) { |
|
1241 for (i = 0; i < 32; i++) { |
|
1242 hw->phy_addr = i; |
|
1243 e1000_read_phy_reg(hw, PHY_ID2, &tmp); |
|
1244 if (tmp == 0 || tmp == 0xFF) { |
|
1245 if (i == 31) |
|
1246 goto err_eeprom; |
|
1247 continue; |
|
1248 } else |
|
1249 break; |
|
1250 } |
|
1251 } |
|
1252 |
|
1253 /* reset the hardware with the new settings */ |
|
1254 e1000_reset(adapter); |
|
1255 |
|
1256 // offer device to EtherCAT master module |
|
1257 adapter->ecdev = ecdev_offer(netdev, ec_poll, THIS_MODULE); |
|
1258 if (adapter->ecdev) { |
|
1259 err = ecdev_open(adapter->ecdev); |
|
1260 if (err) { |
|
1261 ecdev_withdraw(adapter->ecdev); |
|
1262 goto err_register; |
|
1263 } |
|
1264 } else { |
|
1265 strcpy(netdev->name, "eth%d"); |
|
1266 err = register_netdev(netdev); |
|
1267 if (err) |
|
1268 goto err_register; |
|
1269 } |
|
1270 |
|
1271 e1000_vlan_filter_on_off(adapter, false); |
|
1272 |
|
1273 /* print bus type/speed/width info */ |
|
1274 e_info(probe, "(PCI%s:%dMHz:%d-bit) %pM\n", |
|
1275 ((hw->bus_type == e1000_bus_type_pcix) ? "-X" : ""), |
|
1276 ((hw->bus_speed == e1000_bus_speed_133) ? 133 : |
|
1277 (hw->bus_speed == e1000_bus_speed_120) ? 120 : |
|
1278 (hw->bus_speed == e1000_bus_speed_100) ? 100 : |
|
1279 (hw->bus_speed == e1000_bus_speed_66) ? 66 : 33), |
|
1280 ((hw->bus_width == e1000_bus_width_64) ? 64 : 32), |
|
1281 netdev->dev_addr); |
|
1282 |
|
1283 if (!adapter->ecdev) { |
|
1284 /* carrier off reporting is important to ethtool even BEFORE open */ |
|
1285 netif_carrier_off(netdev); |
|
1286 } |
|
1287 |
|
1288 e_info(probe, "Intel(R) PRO/1000 Network Connection\n"); |
|
1289 |
|
1290 cards_found++; |
|
1291 return 0; |
|
1292 |
|
1293 err_register: |
|
1294 err_eeprom: |
|
1295 e1000_phy_hw_reset(hw); |
|
1296 |
|
1297 if (hw->flash_address) |
|
1298 iounmap(hw->flash_address); |
|
1299 kfree(adapter->tx_ring); |
|
1300 kfree(adapter->rx_ring); |
|
1301 err_dma: |
|
1302 err_sw_init: |
|
1303 err_mdio_ioremap: |
|
1304 iounmap(hw->ce4100_gbe_mdio_base_virt); |
|
1305 iounmap(hw->hw_addr); |
|
1306 err_ioremap: |
|
1307 free_netdev(netdev); |
|
1308 err_alloc_etherdev: |
|
1309 pci_release_selected_regions(pdev, bars); |
|
1310 err_pci_reg: |
|
1311 pci_disable_device(pdev); |
|
1312 return err; |
|
1313 } |
|
1314 |
|
1315 /** |
|
1316 * e1000_remove - Device Removal Routine |
|
1317 * @pdev: PCI device information struct |
|
1318 * |
|
1319 * e1000_remove is called by the PCI subsystem to alert the driver |
|
1320 * that it should release a PCI device. The could be caused by a |
|
1321 * Hot-Plug event, or because the driver is going to be removed from |
|
1322 * memory. |
|
1323 **/ |
|
1324 |
|
1325 static void __devexit e1000_remove(struct pci_dev *pdev) |
|
1326 { |
|
1327 struct net_device *netdev = pci_get_drvdata(pdev); |
|
1328 struct e1000_adapter *adapter = netdev_priv(netdev); |
|
1329 struct e1000_hw *hw = &adapter->hw; |
|
1330 |
|
1331 e1000_down_and_stop(adapter); |
|
1332 e1000_release_manageability(adapter); |
|
1333 |
|
1334 if (adapter->ecdev) { |
|
1335 ecdev_close(adapter->ecdev); |
|
1336 ecdev_withdraw(adapter->ecdev); |
|
1337 } else { |
|
1338 unregister_netdev(netdev); |
|
1339 } |
|
1340 |
|
1341 e1000_phy_hw_reset(hw); |
|
1342 |
|
1343 kfree(adapter->tx_ring); |
|
1344 kfree(adapter->rx_ring); |
|
1345 |
|
1346 if (hw->mac_type == e1000_ce4100) |
|
1347 iounmap(hw->ce4100_gbe_mdio_base_virt); |
|
1348 iounmap(hw->hw_addr); |
|
1349 if (hw->flash_address) |
|
1350 iounmap(hw->flash_address); |
|
1351 pci_release_selected_regions(pdev, adapter->bars); |
|
1352 |
|
1353 free_netdev(netdev); |
|
1354 |
|
1355 pci_disable_device(pdev); |
|
1356 } |
|
1357 |
|
1358 /** |
|
1359 * e1000_sw_init - Initialize general software structures (struct e1000_adapter) |
|
1360 * @adapter: board private structure to initialize |
|
1361 * |
|
1362 * e1000_sw_init initializes the Adapter private data structure. |
|
1363 * e1000_init_hw_struct MUST be called before this function |
|
1364 **/ |
|
1365 |
|
1366 static int __devinit e1000_sw_init(struct e1000_adapter *adapter) |
|
1367 { |
|
1368 adapter->rx_buffer_len = MAXIMUM_ETHERNET_VLAN_SIZE; |
|
1369 |
|
1370 adapter->num_tx_queues = 1; |
|
1371 adapter->num_rx_queues = 1; |
|
1372 |
|
1373 if (e1000_alloc_queues(adapter)) { |
|
1374 e_err(probe, "Unable to allocate memory for queues\n"); |
|
1375 return -ENOMEM; |
|
1376 } |
|
1377 |
|
1378 /* Explicitly disable IRQ since the NIC can be in any state. */ |
|
1379 e1000_irq_disable(adapter); |
|
1380 |
|
1381 spin_lock_init(&adapter->stats_lock); |
|
1382 mutex_init(&adapter->mutex); |
|
1383 |
|
1384 set_bit(__E1000_DOWN, &adapter->flags); |
|
1385 |
|
1386 return 0; |
|
1387 } |
|
1388 |
|
1389 /** |
|
1390 * e1000_alloc_queues - Allocate memory for all rings |
|
1391 * @adapter: board private structure to initialize |
|
1392 * |
|
1393 * We allocate one ring per queue at run-time since we don't know the |
|
1394 * number of queues at compile-time. |
|
1395 **/ |
|
1396 |
|
1397 static int __devinit e1000_alloc_queues(struct e1000_adapter *adapter) |
|
1398 { |
|
1399 adapter->tx_ring = kcalloc(adapter->num_tx_queues, |
|
1400 sizeof(struct e1000_tx_ring), GFP_KERNEL); |
|
1401 if (!adapter->tx_ring) |
|
1402 return -ENOMEM; |
|
1403 |
|
1404 adapter->rx_ring = kcalloc(adapter->num_rx_queues, |
|
1405 sizeof(struct e1000_rx_ring), GFP_KERNEL); |
|
1406 if (!adapter->rx_ring) { |
|
1407 kfree(adapter->tx_ring); |
|
1408 return -ENOMEM; |
|
1409 } |
|
1410 |
|
1411 return E1000_SUCCESS; |
|
1412 } |
|
1413 |
|
1414 /** |
|
1415 * e1000_open - Called when a network interface is made active |
|
1416 * @netdev: network interface device structure |
|
1417 * |
|
1418 * Returns 0 on success, negative value on failure |
|
1419 * |
|
1420 * The open entry point is called when a network interface is made |
|
1421 * active by the system (IFF_UP). At this point all resources needed |
|
1422 * for transmit and receive operations are allocated, the interrupt |
|
1423 * handler is registered with the OS, the watchdog task is started, |
|
1424 * and the stack is notified that the interface is ready. |
|
1425 **/ |
|
1426 |
|
1427 static int e1000_open(struct net_device *netdev) |
|
1428 { |
|
1429 struct e1000_adapter *adapter = netdev_priv(netdev); |
|
1430 struct e1000_hw *hw = &adapter->hw; |
|
1431 int err; |
|
1432 |
|
1433 /* disallow open during test */ |
|
1434 if (test_bit(__E1000_TESTING, &adapter->flags)) |
|
1435 return -EBUSY; |
|
1436 |
|
1437 netif_carrier_off(netdev); |
|
1438 |
|
1439 /* allocate transmit descriptors */ |
|
1440 err = e1000_setup_all_tx_resources(adapter); |
|
1441 if (err) |
|
1442 goto err_setup_tx; |
|
1443 |
|
1444 /* allocate receive descriptors */ |
|
1445 err = e1000_setup_all_rx_resources(adapter); |
|
1446 if (err) |
|
1447 goto err_setup_rx; |
|
1448 |
|
1449 e1000_power_up_phy(adapter); |
|
1450 |
|
1451 adapter->mng_vlan_id = E1000_MNG_VLAN_NONE; |
|
1452 if ((hw->mng_cookie.status & |
|
1453 E1000_MNG_DHCP_COOKIE_STATUS_VLAN_SUPPORT)) { |
|
1454 e1000_update_mng_vlan(adapter); |
|
1455 } |
|
1456 |
|
1457 /* before we allocate an interrupt, we must be ready to handle it. |
|
1458 * Setting DEBUG_SHIRQ in the kernel makes it fire an interrupt |
|
1459 * as soon as we call pci_request_irq, so we have to setup our |
|
1460 * clean_rx handler before we do so. */ |
|
1461 e1000_configure(adapter); |
|
1462 |
|
1463 err = e1000_request_irq(adapter); |
|
1464 if (err) |
|
1465 goto err_req_irq; |
|
1466 |
|
1467 /* From here on the code is the same as e1000_up() */ |
|
1468 clear_bit(__E1000_DOWN, &adapter->flags); |
|
1469 |
|
1470 if (!adapter->ecdev) { |
|
1471 napi_enable(&adapter->napi); |
|
1472 |
|
1473 e1000_irq_enable(adapter); |
|
1474 |
|
1475 netif_start_queue(netdev); |
|
1476 } |
|
1477 |
|
1478 /* fire a link status change interrupt to start the watchdog */ |
|
1479 ew32(ICS, E1000_ICS_LSC); |
|
1480 |
|
1481 return E1000_SUCCESS; |
|
1482 |
|
1483 err_req_irq: |
|
1484 e1000_power_down_phy(adapter); |
|
1485 e1000_free_all_rx_resources(adapter); |
|
1486 err_setup_rx: |
|
1487 e1000_free_all_tx_resources(adapter); |
|
1488 err_setup_tx: |
|
1489 e1000_reset(adapter); |
|
1490 |
|
1491 return err; |
|
1492 } |
|
1493 |
|
1494 /** |
|
1495 * e1000_close - Disables a network interface |
|
1496 * @netdev: network interface device structure |
|
1497 * |
|
1498 * Returns 0, this is not allowed to fail |
|
1499 * |
|
1500 * The close entry point is called when an interface is de-activated |
|
1501 * by the OS. The hardware is still under the drivers control, but |
|
1502 * needs to be disabled. A global MAC reset is issued to stop the |
|
1503 * hardware, and all transmit and receive resources are freed. |
|
1504 **/ |
|
1505 |
|
1506 static int e1000_close(struct net_device *netdev) |
|
1507 { |
|
1508 struct e1000_adapter *adapter = netdev_priv(netdev); |
|
1509 struct e1000_hw *hw = &adapter->hw; |
|
1510 |
|
1511 WARN_ON(test_bit(__E1000_RESETTING, &adapter->flags)); |
|
1512 e1000_down(adapter); |
|
1513 e1000_power_down_phy(adapter); |
|
1514 e1000_free_irq(adapter); |
|
1515 |
|
1516 e1000_free_all_tx_resources(adapter); |
|
1517 e1000_free_all_rx_resources(adapter); |
|
1518 |
|
1519 /* kill manageability vlan ID if supported, but not if a vlan with |
|
1520 * the same ID is registered on the host OS (let 8021q kill it) */ |
|
1521 if ((hw->mng_cookie.status & |
|
1522 E1000_MNG_DHCP_COOKIE_STATUS_VLAN_SUPPORT) && |
|
1523 !test_bit(adapter->mng_vlan_id, adapter->active_vlans)) { |
|
1524 e1000_vlan_rx_kill_vid(netdev, adapter->mng_vlan_id); |
|
1525 } |
|
1526 |
|
1527 return 0; |
|
1528 } |
|
1529 |
|
1530 /** |
|
1531 * e1000_check_64k_bound - check that memory doesn't cross 64kB boundary |
|
1532 * @adapter: address of board private structure |
|
1533 * @start: address of beginning of memory |
|
1534 * @len: length of memory |
|
1535 **/ |
|
1536 static bool e1000_check_64k_bound(struct e1000_adapter *adapter, void *start, |
|
1537 unsigned long len) |
|
1538 { |
|
1539 struct e1000_hw *hw = &adapter->hw; |
|
1540 unsigned long begin = (unsigned long)start; |
|
1541 unsigned long end = begin + len; |
|
1542 |
|
1543 /* First rev 82545 and 82546 need to not allow any memory |
|
1544 * write location to cross 64k boundary due to errata 23 */ |
|
1545 if (hw->mac_type == e1000_82545 || |
|
1546 hw->mac_type == e1000_ce4100 || |
|
1547 hw->mac_type == e1000_82546) { |
|
1548 return ((begin ^ (end - 1)) >> 16) != 0 ? false : true; |
|
1549 } |
|
1550 |
|
1551 return true; |
|
1552 } |
|
1553 |
|
1554 /** |
|
1555 * e1000_setup_tx_resources - allocate Tx resources (Descriptors) |
|
1556 * @adapter: board private structure |
|
1557 * @txdr: tx descriptor ring (for a specific queue) to setup |
|
1558 * |
|
1559 * Return 0 on success, negative on failure |
|
1560 **/ |
|
1561 |
|
1562 static int e1000_setup_tx_resources(struct e1000_adapter *adapter, |
|
1563 struct e1000_tx_ring *txdr) |
|
1564 { |
|
1565 struct pci_dev *pdev = adapter->pdev; |
|
1566 int size; |
|
1567 |
|
1568 size = sizeof(struct e1000_buffer) * txdr->count; |
|
1569 txdr->buffer_info = vzalloc(size); |
|
1570 if (!txdr->buffer_info) { |
|
1571 e_err(probe, "Unable to allocate memory for the Tx descriptor " |
|
1572 "ring\n"); |
|
1573 return -ENOMEM; |
|
1574 } |
|
1575 |
|
1576 /* round up to nearest 4K */ |
|
1577 |
|
1578 txdr->size = txdr->count * sizeof(struct e1000_tx_desc); |
|
1579 txdr->size = ALIGN(txdr->size, 4096); |
|
1580 |
|
1581 txdr->desc = dma_alloc_coherent(&pdev->dev, txdr->size, &txdr->dma, |
|
1582 GFP_KERNEL); |
|
1583 if (!txdr->desc) { |
|
1584 setup_tx_desc_die: |
|
1585 vfree(txdr->buffer_info); |
|
1586 e_err(probe, "Unable to allocate memory for the Tx descriptor " |
|
1587 "ring\n"); |
|
1588 return -ENOMEM; |
|
1589 } |
|
1590 |
|
1591 /* Fix for errata 23, can't cross 64kB boundary */ |
|
1592 if (!e1000_check_64k_bound(adapter, txdr->desc, txdr->size)) { |
|
1593 void *olddesc = txdr->desc; |
|
1594 dma_addr_t olddma = txdr->dma; |
|
1595 e_err(tx_err, "txdr align check failed: %u bytes at %p\n", |
|
1596 txdr->size, txdr->desc); |
|
1597 /* Try again, without freeing the previous */ |
|
1598 txdr->desc = dma_alloc_coherent(&pdev->dev, txdr->size, |
|
1599 &txdr->dma, GFP_KERNEL); |
|
1600 /* Failed allocation, critical failure */ |
|
1601 if (!txdr->desc) { |
|
1602 dma_free_coherent(&pdev->dev, txdr->size, olddesc, |
|
1603 olddma); |
|
1604 goto setup_tx_desc_die; |
|
1605 } |
|
1606 |
|
1607 if (!e1000_check_64k_bound(adapter, txdr->desc, txdr->size)) { |
|
1608 /* give up */ |
|
1609 dma_free_coherent(&pdev->dev, txdr->size, txdr->desc, |
|
1610 txdr->dma); |
|
1611 dma_free_coherent(&pdev->dev, txdr->size, olddesc, |
|
1612 olddma); |
|
1613 e_err(probe, "Unable to allocate aligned memory " |
|
1614 "for the transmit descriptor ring\n"); |
|
1615 vfree(txdr->buffer_info); |
|
1616 return -ENOMEM; |
|
1617 } else { |
|
1618 /* Free old allocation, new allocation was successful */ |
|
1619 dma_free_coherent(&pdev->dev, txdr->size, olddesc, |
|
1620 olddma); |
|
1621 } |
|
1622 } |
|
1623 memset(txdr->desc, 0, txdr->size); |
|
1624 |
|
1625 txdr->next_to_use = 0; |
|
1626 txdr->next_to_clean = 0; |
|
1627 |
|
1628 return 0; |
|
1629 } |
|
1630 |
|
1631 /** |
|
1632 * e1000_setup_all_tx_resources - wrapper to allocate Tx resources |
|
1633 * (Descriptors) for all queues |
|
1634 * @adapter: board private structure |
|
1635 * |
|
1636 * Return 0 on success, negative on failure |
|
1637 **/ |
|
1638 |
|
1639 int e1000_setup_all_tx_resources(struct e1000_adapter *adapter) |
|
1640 { |
|
1641 int i, err = 0; |
|
1642 |
|
1643 for (i = 0; i < adapter->num_tx_queues; i++) { |
|
1644 err = e1000_setup_tx_resources(adapter, &adapter->tx_ring[i]); |
|
1645 if (err) { |
|
1646 e_err(probe, "Allocation for Tx Queue %u failed\n", i); |
|
1647 for (i-- ; i >= 0; i--) |
|
1648 e1000_free_tx_resources(adapter, |
|
1649 &adapter->tx_ring[i]); |
|
1650 break; |
|
1651 } |
|
1652 } |
|
1653 |
|
1654 return err; |
|
1655 } |
|
1656 |
|
1657 /** |
|
1658 * e1000_configure_tx - Configure 8254x Transmit Unit after Reset |
|
1659 * @adapter: board private structure |
|
1660 * |
|
1661 * Configure the Tx unit of the MAC after a reset. |
|
1662 **/ |
|
1663 |
|
1664 static void e1000_configure_tx(struct e1000_adapter *adapter) |
|
1665 { |
|
1666 u64 tdba; |
|
1667 struct e1000_hw *hw = &adapter->hw; |
|
1668 u32 tdlen, tctl, tipg; |
|
1669 u32 ipgr1, ipgr2; |
|
1670 |
|
1671 /* Setup the HW Tx Head and Tail descriptor pointers */ |
|
1672 |
|
1673 switch (adapter->num_tx_queues) { |
|
1674 case 1: |
|
1675 default: |
|
1676 tdba = adapter->tx_ring[0].dma; |
|
1677 tdlen = adapter->tx_ring[0].count * |
|
1678 sizeof(struct e1000_tx_desc); |
|
1679 ew32(TDLEN, tdlen); |
|
1680 ew32(TDBAH, (tdba >> 32)); |
|
1681 ew32(TDBAL, (tdba & 0x00000000ffffffffULL)); |
|
1682 ew32(TDT, 0); |
|
1683 ew32(TDH, 0); |
|
1684 adapter->tx_ring[0].tdh = ((hw->mac_type >= e1000_82543) ? E1000_TDH : E1000_82542_TDH); |
|
1685 adapter->tx_ring[0].tdt = ((hw->mac_type >= e1000_82543) ? E1000_TDT : E1000_82542_TDT); |
|
1686 break; |
|
1687 } |
|
1688 |
|
1689 /* Set the default values for the Tx Inter Packet Gap timer */ |
|
1690 if ((hw->media_type == e1000_media_type_fiber || |
|
1691 hw->media_type == e1000_media_type_internal_serdes)) |
|
1692 tipg = DEFAULT_82543_TIPG_IPGT_FIBER; |
|
1693 else |
|
1694 tipg = DEFAULT_82543_TIPG_IPGT_COPPER; |
|
1695 |
|
1696 switch (hw->mac_type) { |
|
1697 case e1000_82542_rev2_0: |
|
1698 case e1000_82542_rev2_1: |
|
1699 tipg = DEFAULT_82542_TIPG_IPGT; |
|
1700 ipgr1 = DEFAULT_82542_TIPG_IPGR1; |
|
1701 ipgr2 = DEFAULT_82542_TIPG_IPGR2; |
|
1702 break; |
|
1703 default: |
|
1704 ipgr1 = DEFAULT_82543_TIPG_IPGR1; |
|
1705 ipgr2 = DEFAULT_82543_TIPG_IPGR2; |
|
1706 break; |
|
1707 } |
|
1708 tipg |= ipgr1 << E1000_TIPG_IPGR1_SHIFT; |
|
1709 tipg |= ipgr2 << E1000_TIPG_IPGR2_SHIFT; |
|
1710 ew32(TIPG, tipg); |
|
1711 |
|
1712 /* Set the Tx Interrupt Delay register */ |
|
1713 |
|
1714 ew32(TIDV, adapter->tx_int_delay); |
|
1715 if (hw->mac_type >= e1000_82540) |
|
1716 ew32(TADV, adapter->tx_abs_int_delay); |
|
1717 |
|
1718 /* Program the Transmit Control Register */ |
|
1719 |
|
1720 tctl = er32(TCTL); |
|
1721 tctl &= ~E1000_TCTL_CT; |
|
1722 tctl |= E1000_TCTL_PSP | E1000_TCTL_RTLC | |
|
1723 (E1000_COLLISION_THRESHOLD << E1000_CT_SHIFT); |
|
1724 |
|
1725 e1000_config_collision_dist(hw); |
|
1726 |
|
1727 /* Setup Transmit Descriptor Settings for eop descriptor */ |
|
1728 adapter->txd_cmd = E1000_TXD_CMD_EOP | E1000_TXD_CMD_IFCS; |
|
1729 |
|
1730 /* only set IDE if we are delaying interrupts using the timers */ |
|
1731 if (adapter->tx_int_delay) |
|
1732 adapter->txd_cmd |= E1000_TXD_CMD_IDE; |
|
1733 |
|
1734 if (hw->mac_type < e1000_82543) |
|
1735 adapter->txd_cmd |= E1000_TXD_CMD_RPS; |
|
1736 else |
|
1737 adapter->txd_cmd |= E1000_TXD_CMD_RS; |
|
1738 |
|
1739 /* Cache if we're 82544 running in PCI-X because we'll |
|
1740 * need this to apply a workaround later in the send path. */ |
|
1741 if (hw->mac_type == e1000_82544 && |
|
1742 hw->bus_type == e1000_bus_type_pcix) |
|
1743 adapter->pcix_82544 = true; |
|
1744 |
|
1745 ew32(TCTL, tctl); |
|
1746 |
|
1747 } |
|
1748 |
|
1749 /** |
|
1750 * e1000_setup_rx_resources - allocate Rx resources (Descriptors) |
|
1751 * @adapter: board private structure |
|
1752 * @rxdr: rx descriptor ring (for a specific queue) to setup |
|
1753 * |
|
1754 * Returns 0 on success, negative on failure |
|
1755 **/ |
|
1756 |
|
1757 static int e1000_setup_rx_resources(struct e1000_adapter *adapter, |
|
1758 struct e1000_rx_ring *rxdr) |
|
1759 { |
|
1760 struct pci_dev *pdev = adapter->pdev; |
|
1761 int size, desc_len; |
|
1762 |
|
1763 size = sizeof(struct e1000_buffer) * rxdr->count; |
|
1764 rxdr->buffer_info = vzalloc(size); |
|
1765 if (!rxdr->buffer_info) { |
|
1766 e_err(probe, "Unable to allocate memory for the Rx descriptor " |
|
1767 "ring\n"); |
|
1768 return -ENOMEM; |
|
1769 } |
|
1770 |
|
1771 desc_len = sizeof(struct e1000_rx_desc); |
|
1772 |
|
1773 /* Round up to nearest 4K */ |
|
1774 |
|
1775 rxdr->size = rxdr->count * desc_len; |
|
1776 rxdr->size = ALIGN(rxdr->size, 4096); |
|
1777 |
|
1778 rxdr->desc = dma_alloc_coherent(&pdev->dev, rxdr->size, &rxdr->dma, |
|
1779 GFP_KERNEL); |
|
1780 |
|
1781 if (!rxdr->desc) { |
|
1782 e_err(probe, "Unable to allocate memory for the Rx descriptor " |
|
1783 "ring\n"); |
|
1784 setup_rx_desc_die: |
|
1785 vfree(rxdr->buffer_info); |
|
1786 return -ENOMEM; |
|
1787 } |
|
1788 |
|
1789 /* Fix for errata 23, can't cross 64kB boundary */ |
|
1790 if (!e1000_check_64k_bound(adapter, rxdr->desc, rxdr->size)) { |
|
1791 void *olddesc = rxdr->desc; |
|
1792 dma_addr_t olddma = rxdr->dma; |
|
1793 e_err(rx_err, "rxdr align check failed: %u bytes at %p\n", |
|
1794 rxdr->size, rxdr->desc); |
|
1795 /* Try again, without freeing the previous */ |
|
1796 rxdr->desc = dma_alloc_coherent(&pdev->dev, rxdr->size, |
|
1797 &rxdr->dma, GFP_KERNEL); |
|
1798 /* Failed allocation, critical failure */ |
|
1799 if (!rxdr->desc) { |
|
1800 dma_free_coherent(&pdev->dev, rxdr->size, olddesc, |
|
1801 olddma); |
|
1802 e_err(probe, "Unable to allocate memory for the Rx " |
|
1803 "descriptor ring\n"); |
|
1804 goto setup_rx_desc_die; |
|
1805 } |
|
1806 |
|
1807 if (!e1000_check_64k_bound(adapter, rxdr->desc, rxdr->size)) { |
|
1808 /* give up */ |
|
1809 dma_free_coherent(&pdev->dev, rxdr->size, rxdr->desc, |
|
1810 rxdr->dma); |
|
1811 dma_free_coherent(&pdev->dev, rxdr->size, olddesc, |
|
1812 olddma); |
|
1813 e_err(probe, "Unable to allocate aligned memory for " |
|
1814 "the Rx descriptor ring\n"); |
|
1815 goto setup_rx_desc_die; |
|
1816 } else { |
|
1817 /* Free old allocation, new allocation was successful */ |
|
1818 dma_free_coherent(&pdev->dev, rxdr->size, olddesc, |
|
1819 olddma); |
|
1820 } |
|
1821 } |
|
1822 memset(rxdr->desc, 0, rxdr->size); |
|
1823 |
|
1824 rxdr->next_to_clean = 0; |
|
1825 rxdr->next_to_use = 0; |
|
1826 rxdr->rx_skb_top = NULL; |
|
1827 |
|
1828 return 0; |
|
1829 } |
|
1830 |
|
1831 /** |
|
1832 * e1000_setup_all_rx_resources - wrapper to allocate Rx resources |
|
1833 * (Descriptors) for all queues |
|
1834 * @adapter: board private structure |
|
1835 * |
|
1836 * Return 0 on success, negative on failure |
|
1837 **/ |
|
1838 |
|
1839 int e1000_setup_all_rx_resources(struct e1000_adapter *adapter) |
|
1840 { |
|
1841 int i, err = 0; |
|
1842 |
|
1843 for (i = 0; i < adapter->num_rx_queues; i++) { |
|
1844 err = e1000_setup_rx_resources(adapter, &adapter->rx_ring[i]); |
|
1845 if (err) { |
|
1846 e_err(probe, "Allocation for Rx Queue %u failed\n", i); |
|
1847 for (i-- ; i >= 0; i--) |
|
1848 e1000_free_rx_resources(adapter, |
|
1849 &adapter->rx_ring[i]); |
|
1850 break; |
|
1851 } |
|
1852 } |
|
1853 |
|
1854 return err; |
|
1855 } |
|
1856 |
|
1857 /** |
|
1858 * e1000_setup_rctl - configure the receive control registers |
|
1859 * @adapter: Board private structure |
|
1860 **/ |
|
1861 static void e1000_setup_rctl(struct e1000_adapter *adapter) |
|
1862 { |
|
1863 struct e1000_hw *hw = &adapter->hw; |
|
1864 u32 rctl; |
|
1865 |
|
1866 rctl = er32(RCTL); |
|
1867 |
|
1868 rctl &= ~(3 << E1000_RCTL_MO_SHIFT); |
|
1869 |
|
1870 rctl |= E1000_RCTL_BAM | E1000_RCTL_LBM_NO | |
|
1871 E1000_RCTL_RDMTS_HALF | |
|
1872 (hw->mc_filter_type << E1000_RCTL_MO_SHIFT); |
|
1873 |
|
1874 if (hw->tbi_compatibility_on == 1) |
|
1875 rctl |= E1000_RCTL_SBP; |
|
1876 else |
|
1877 rctl &= ~E1000_RCTL_SBP; |
|
1878 |
|
1879 if (adapter->netdev->mtu <= ETH_DATA_LEN) |
|
1880 rctl &= ~E1000_RCTL_LPE; |
|
1881 else |
|
1882 rctl |= E1000_RCTL_LPE; |
|
1883 |
|
1884 /* Setup buffer sizes */ |
|
1885 rctl &= ~E1000_RCTL_SZ_4096; |
|
1886 rctl |= E1000_RCTL_BSEX; |
|
1887 switch (adapter->rx_buffer_len) { |
|
1888 case E1000_RXBUFFER_2048: |
|
1889 default: |
|
1890 rctl |= E1000_RCTL_SZ_2048; |
|
1891 rctl &= ~E1000_RCTL_BSEX; |
|
1892 break; |
|
1893 case E1000_RXBUFFER_4096: |
|
1894 rctl |= E1000_RCTL_SZ_4096; |
|
1895 break; |
|
1896 case E1000_RXBUFFER_8192: |
|
1897 rctl |= E1000_RCTL_SZ_8192; |
|
1898 break; |
|
1899 case E1000_RXBUFFER_16384: |
|
1900 rctl |= E1000_RCTL_SZ_16384; |
|
1901 break; |
|
1902 } |
|
1903 |
|
1904 ew32(RCTL, rctl); |
|
1905 } |
|
1906 |
|
1907 /** |
|
1908 * e1000_configure_rx - Configure 8254x Receive Unit after Reset |
|
1909 * @adapter: board private structure |
|
1910 * |
|
1911 * Configure the Rx unit of the MAC after a reset. |
|
1912 **/ |
|
1913 |
|
1914 static void e1000_configure_rx(struct e1000_adapter *adapter) |
|
1915 { |
|
1916 u64 rdba; |
|
1917 struct e1000_hw *hw = &adapter->hw; |
|
1918 u32 rdlen, rctl, rxcsum; |
|
1919 |
|
1920 if (adapter->netdev->mtu > ETH_DATA_LEN) { |
|
1921 rdlen = adapter->rx_ring[0].count * |
|
1922 sizeof(struct e1000_rx_desc); |
|
1923 adapter->clean_rx = e1000_clean_jumbo_rx_irq; |
|
1924 adapter->alloc_rx_buf = e1000_alloc_jumbo_rx_buffers; |
|
1925 } else { |
|
1926 rdlen = adapter->rx_ring[0].count * |
|
1927 sizeof(struct e1000_rx_desc); |
|
1928 adapter->clean_rx = e1000_clean_rx_irq; |
|
1929 adapter->alloc_rx_buf = e1000_alloc_rx_buffers; |
|
1930 } |
|
1931 |
|
1932 /* disable receives while setting up the descriptors */ |
|
1933 rctl = er32(RCTL); |
|
1934 ew32(RCTL, rctl & ~E1000_RCTL_EN); |
|
1935 |
|
1936 /* set the Receive Delay Timer Register */ |
|
1937 ew32(RDTR, adapter->rx_int_delay); |
|
1938 |
|
1939 if (hw->mac_type >= e1000_82540) { |
|
1940 ew32(RADV, adapter->rx_abs_int_delay); |
|
1941 if (adapter->itr_setting != 0) |
|
1942 ew32(ITR, 1000000000 / (adapter->itr * 256)); |
|
1943 } |
|
1944 |
|
1945 /* Setup the HW Rx Head and Tail Descriptor Pointers and |
|
1946 * the Base and Length of the Rx Descriptor Ring */ |
|
1947 switch (adapter->num_rx_queues) { |
|
1948 case 1: |
|
1949 default: |
|
1950 rdba = adapter->rx_ring[0].dma; |
|
1951 ew32(RDLEN, rdlen); |
|
1952 ew32(RDBAH, (rdba >> 32)); |
|
1953 ew32(RDBAL, (rdba & 0x00000000ffffffffULL)); |
|
1954 ew32(RDT, 0); |
|
1955 ew32(RDH, 0); |
|
1956 adapter->rx_ring[0].rdh = ((hw->mac_type >= e1000_82543) ? E1000_RDH : E1000_82542_RDH); |
|
1957 adapter->rx_ring[0].rdt = ((hw->mac_type >= e1000_82543) ? E1000_RDT : E1000_82542_RDT); |
|
1958 break; |
|
1959 } |
|
1960 |
|
1961 /* Enable 82543 Receive Checksum Offload for TCP and UDP */ |
|
1962 if (hw->mac_type >= e1000_82543) { |
|
1963 rxcsum = er32(RXCSUM); |
|
1964 if (adapter->rx_csum) |
|
1965 rxcsum |= E1000_RXCSUM_TUOFL; |
|
1966 else |
|
1967 /* don't need to clear IPPCSE as it defaults to 0 */ |
|
1968 rxcsum &= ~E1000_RXCSUM_TUOFL; |
|
1969 ew32(RXCSUM, rxcsum); |
|
1970 } |
|
1971 |
|
1972 /* Enable Receives */ |
|
1973 ew32(RCTL, rctl | E1000_RCTL_EN); |
|
1974 } |
|
1975 |
|
1976 /** |
|
1977 * e1000_free_tx_resources - Free Tx Resources per Queue |
|
1978 * @adapter: board private structure |
|
1979 * @tx_ring: Tx descriptor ring for a specific queue |
|
1980 * |
|
1981 * Free all transmit software resources |
|
1982 **/ |
|
1983 |
|
1984 static void e1000_free_tx_resources(struct e1000_adapter *adapter, |
|
1985 struct e1000_tx_ring *tx_ring) |
|
1986 { |
|
1987 struct pci_dev *pdev = adapter->pdev; |
|
1988 |
|
1989 e1000_clean_tx_ring(adapter, tx_ring); |
|
1990 |
|
1991 vfree(tx_ring->buffer_info); |
|
1992 tx_ring->buffer_info = NULL; |
|
1993 |
|
1994 dma_free_coherent(&pdev->dev, tx_ring->size, tx_ring->desc, |
|
1995 tx_ring->dma); |
|
1996 |
|
1997 tx_ring->desc = NULL; |
|
1998 } |
|
1999 |
|
2000 /** |
|
2001 * e1000_free_all_tx_resources - Free Tx Resources for All Queues |
|
2002 * @adapter: board private structure |
|
2003 * |
|
2004 * Free all transmit software resources |
|
2005 **/ |
|
2006 |
|
2007 void e1000_free_all_tx_resources(struct e1000_adapter *adapter) |
|
2008 { |
|
2009 int i; |
|
2010 |
|
2011 for (i = 0; i < adapter->num_tx_queues; i++) |
|
2012 e1000_free_tx_resources(adapter, &adapter->tx_ring[i]); |
|
2013 } |
|
2014 |
|
2015 static void e1000_unmap_and_free_tx_resource(struct e1000_adapter *adapter, |
|
2016 struct e1000_buffer *buffer_info) |
|
2017 { |
|
2018 if (adapter->ecdev) { |
|
2019 return; |
|
2020 } |
|
2021 |
|
2022 if (buffer_info->dma) { |
|
2023 if (buffer_info->mapped_as_page) |
|
2024 dma_unmap_page(&adapter->pdev->dev, buffer_info->dma, |
|
2025 buffer_info->length, DMA_TO_DEVICE); |
|
2026 else |
|
2027 dma_unmap_single(&adapter->pdev->dev, buffer_info->dma, |
|
2028 buffer_info->length, |
|
2029 DMA_TO_DEVICE); |
|
2030 buffer_info->dma = 0; |
|
2031 } |
|
2032 if (buffer_info->skb) { |
|
2033 dev_kfree_skb_any(buffer_info->skb); |
|
2034 buffer_info->skb = NULL; |
|
2035 } |
|
2036 buffer_info->time_stamp = 0; |
|
2037 /* buffer_info must be completely set up in the transmit path */ |
|
2038 } |
|
2039 |
|
2040 /** |
|
2041 * e1000_clean_tx_ring - Free Tx Buffers |
|
2042 * @adapter: board private structure |
|
2043 * @tx_ring: ring to be cleaned |
|
2044 **/ |
|
2045 |
|
2046 static void e1000_clean_tx_ring(struct e1000_adapter *adapter, |
|
2047 struct e1000_tx_ring *tx_ring) |
|
2048 { |
|
2049 struct e1000_hw *hw = &adapter->hw; |
|
2050 struct e1000_buffer *buffer_info; |
|
2051 unsigned long size; |
|
2052 unsigned int i; |
|
2053 |
|
2054 /* Free all the Tx ring sk_buffs */ |
|
2055 |
|
2056 for (i = 0; i < tx_ring->count; i++) { |
|
2057 buffer_info = &tx_ring->buffer_info[i]; |
|
2058 e1000_unmap_and_free_tx_resource(adapter, buffer_info); |
|
2059 } |
|
2060 |
|
2061 size = sizeof(struct e1000_buffer) * tx_ring->count; |
|
2062 memset(tx_ring->buffer_info, 0, size); |
|
2063 |
|
2064 /* Zero out the descriptor ring */ |
|
2065 |
|
2066 memset(tx_ring->desc, 0, tx_ring->size); |
|
2067 |
|
2068 tx_ring->next_to_use = 0; |
|
2069 tx_ring->next_to_clean = 0; |
|
2070 tx_ring->last_tx_tso = false; |
|
2071 |
|
2072 writel(0, hw->hw_addr + tx_ring->tdh); |
|
2073 writel(0, hw->hw_addr + tx_ring->tdt); |
|
2074 } |
|
2075 |
|
2076 /** |
|
2077 * e1000_clean_all_tx_rings - Free Tx Buffers for all queues |
|
2078 * @adapter: board private structure |
|
2079 **/ |
|
2080 |
|
2081 static void e1000_clean_all_tx_rings(struct e1000_adapter *adapter) |
|
2082 { |
|
2083 int i; |
|
2084 |
|
2085 for (i = 0; i < adapter->num_tx_queues; i++) |
|
2086 e1000_clean_tx_ring(adapter, &adapter->tx_ring[i]); |
|
2087 } |
|
2088 |
|
2089 /** |
|
2090 * e1000_free_rx_resources - Free Rx Resources |
|
2091 * @adapter: board private structure |
|
2092 * @rx_ring: ring to clean the resources from |
|
2093 * |
|
2094 * Free all receive software resources |
|
2095 **/ |
|
2096 |
|
2097 static void e1000_free_rx_resources(struct e1000_adapter *adapter, |
|
2098 struct e1000_rx_ring *rx_ring) |
|
2099 { |
|
2100 struct pci_dev *pdev = adapter->pdev; |
|
2101 |
|
2102 e1000_clean_rx_ring(adapter, rx_ring); |
|
2103 |
|
2104 vfree(rx_ring->buffer_info); |
|
2105 rx_ring->buffer_info = NULL; |
|
2106 |
|
2107 dma_free_coherent(&pdev->dev, rx_ring->size, rx_ring->desc, |
|
2108 rx_ring->dma); |
|
2109 |
|
2110 rx_ring->desc = NULL; |
|
2111 } |
|
2112 |
|
2113 /** |
|
2114 * e1000_free_all_rx_resources - Free Rx Resources for All Queues |
|
2115 * @adapter: board private structure |
|
2116 * |
|
2117 * Free all receive software resources |
|
2118 **/ |
|
2119 |
|
2120 void e1000_free_all_rx_resources(struct e1000_adapter *adapter) |
|
2121 { |
|
2122 int i; |
|
2123 |
|
2124 for (i = 0; i < adapter->num_rx_queues; i++) |
|
2125 e1000_free_rx_resources(adapter, &adapter->rx_ring[i]); |
|
2126 } |
|
2127 |
|
2128 /** |
|
2129 * e1000_clean_rx_ring - Free Rx Buffers per Queue |
|
2130 * @adapter: board private structure |
|
2131 * @rx_ring: ring to free buffers from |
|
2132 **/ |
|
2133 |
|
2134 static void e1000_clean_rx_ring(struct e1000_adapter *adapter, |
|
2135 struct e1000_rx_ring *rx_ring) |
|
2136 { |
|
2137 struct e1000_hw *hw = &adapter->hw; |
|
2138 struct e1000_buffer *buffer_info; |
|
2139 struct pci_dev *pdev = adapter->pdev; |
|
2140 unsigned long size; |
|
2141 unsigned int i; |
|
2142 |
|
2143 /* Free all the Rx ring sk_buffs */ |
|
2144 for (i = 0; i < rx_ring->count; i++) { |
|
2145 buffer_info = &rx_ring->buffer_info[i]; |
|
2146 if (buffer_info->dma && |
|
2147 adapter->clean_rx == e1000_clean_rx_irq) { |
|
2148 dma_unmap_single(&pdev->dev, buffer_info->dma, |
|
2149 buffer_info->length, |
|
2150 DMA_FROM_DEVICE); |
|
2151 } else if (buffer_info->dma && |
|
2152 adapter->clean_rx == e1000_clean_jumbo_rx_irq) { |
|
2153 dma_unmap_page(&pdev->dev, buffer_info->dma, |
|
2154 buffer_info->length, |
|
2155 DMA_FROM_DEVICE); |
|
2156 } |
|
2157 |
|
2158 buffer_info->dma = 0; |
|
2159 if (buffer_info->page) { |
|
2160 put_page(buffer_info->page); |
|
2161 buffer_info->page = NULL; |
|
2162 } |
|
2163 if (buffer_info->skb) { |
|
2164 dev_kfree_skb(buffer_info->skb); |
|
2165 buffer_info->skb = NULL; |
|
2166 } |
|
2167 } |
|
2168 |
|
2169 /* there also may be some cached data from a chained receive */ |
|
2170 if (rx_ring->rx_skb_top) { |
|
2171 dev_kfree_skb(rx_ring->rx_skb_top); |
|
2172 rx_ring->rx_skb_top = NULL; |
|
2173 } |
|
2174 |
|
2175 size = sizeof(struct e1000_buffer) * rx_ring->count; |
|
2176 memset(rx_ring->buffer_info, 0, size); |
|
2177 |
|
2178 /* Zero out the descriptor ring */ |
|
2179 memset(rx_ring->desc, 0, rx_ring->size); |
|
2180 |
|
2181 rx_ring->next_to_clean = 0; |
|
2182 rx_ring->next_to_use = 0; |
|
2183 |
|
2184 writel(0, hw->hw_addr + rx_ring->rdh); |
|
2185 writel(0, hw->hw_addr + rx_ring->rdt); |
|
2186 } |
|
2187 |
|
2188 /** |
|
2189 * e1000_clean_all_rx_rings - Free Rx Buffers for all queues |
|
2190 * @adapter: board private structure |
|
2191 **/ |
|
2192 |
|
2193 static void e1000_clean_all_rx_rings(struct e1000_adapter *adapter) |
|
2194 { |
|
2195 int i; |
|
2196 |
|
2197 for (i = 0; i < adapter->num_rx_queues; i++) |
|
2198 e1000_clean_rx_ring(adapter, &adapter->rx_ring[i]); |
|
2199 } |
|
2200 |
|
2201 /* The 82542 2.0 (revision 2) needs to have the receive unit in reset |
|
2202 * and memory write and invalidate disabled for certain operations |
|
2203 */ |
|
2204 static void e1000_enter_82542_rst(struct e1000_adapter *adapter) |
|
2205 { |
|
2206 struct e1000_hw *hw = &adapter->hw; |
|
2207 struct net_device *netdev = adapter->netdev; |
|
2208 u32 rctl; |
|
2209 |
|
2210 e1000_pci_clear_mwi(hw); |
|
2211 |
|
2212 rctl = er32(RCTL); |
|
2213 rctl |= E1000_RCTL_RST; |
|
2214 ew32(RCTL, rctl); |
|
2215 E1000_WRITE_FLUSH(); |
|
2216 mdelay(5); |
|
2217 |
|
2218 if (!adapter->ecdev && netif_running(netdev)) |
|
2219 e1000_clean_all_rx_rings(adapter); |
|
2220 } |
|
2221 |
|
2222 static void e1000_leave_82542_rst(struct e1000_adapter *adapter) |
|
2223 { |
|
2224 struct e1000_hw *hw = &adapter->hw; |
|
2225 struct net_device *netdev = adapter->netdev; |
|
2226 u32 rctl; |
|
2227 |
|
2228 rctl = er32(RCTL); |
|
2229 rctl &= ~E1000_RCTL_RST; |
|
2230 ew32(RCTL, rctl); |
|
2231 E1000_WRITE_FLUSH(); |
|
2232 mdelay(5); |
|
2233 |
|
2234 if (hw->pci_cmd_word & PCI_COMMAND_INVALIDATE) |
|
2235 e1000_pci_set_mwi(hw); |
|
2236 |
|
2237 if (!adapter->netdev && netif_running(netdev)) { |
|
2238 /* No need to loop, because 82542 supports only 1 queue */ |
|
2239 struct e1000_rx_ring *ring = &adapter->rx_ring[0]; |
|
2240 e1000_configure_rx(adapter); |
|
2241 if (adapter->ecdev) { |
|
2242 /* fill rx ring completely! */ |
|
2243 adapter->alloc_rx_buf(adapter, ring, ring->count); |
|
2244 } else { |
|
2245 /* this one leaves the last ring element unallocated! */ |
|
2246 adapter->alloc_rx_buf(adapter, ring, E1000_DESC_UNUSED(ring)); |
|
2247 } |
|
2248 |
|
2249 } |
|
2250 } |
|
2251 |
|
2252 /** |
|
2253 * e1000_set_mac - Change the Ethernet Address of the NIC |
|
2254 * @netdev: network interface device structure |
|
2255 * @p: pointer to an address structure |
|
2256 * |
|
2257 * Returns 0 on success, negative on failure |
|
2258 **/ |
|
2259 |
|
2260 static int e1000_set_mac(struct net_device *netdev, void *p) |
|
2261 { |
|
2262 struct e1000_adapter *adapter = netdev_priv(netdev); |
|
2263 struct e1000_hw *hw = &adapter->hw; |
|
2264 struct sockaddr *addr = p; |
|
2265 |
|
2266 if (!is_valid_ether_addr(addr->sa_data)) |
|
2267 return -EADDRNOTAVAIL; |
|
2268 |
|
2269 /* 82542 2.0 needs to be in reset to write receive address registers */ |
|
2270 |
|
2271 if (hw->mac_type == e1000_82542_rev2_0) |
|
2272 e1000_enter_82542_rst(adapter); |
|
2273 |
|
2274 memcpy(netdev->dev_addr, addr->sa_data, netdev->addr_len); |
|
2275 memcpy(hw->mac_addr, addr->sa_data, netdev->addr_len); |
|
2276 |
|
2277 e1000_rar_set(hw, hw->mac_addr, 0); |
|
2278 |
|
2279 if (hw->mac_type == e1000_82542_rev2_0) |
|
2280 e1000_leave_82542_rst(adapter); |
|
2281 |
|
2282 return 0; |
|
2283 } |
|
2284 |
|
2285 /** |
|
2286 * e1000_set_rx_mode - Secondary Unicast, Multicast and Promiscuous mode set |
|
2287 * @netdev: network interface device structure |
|
2288 * |
|
2289 * The set_rx_mode entry point is called whenever the unicast or multicast |
|
2290 * address lists or the network interface flags are updated. This routine is |
|
2291 * responsible for configuring the hardware for proper unicast, multicast, |
|
2292 * promiscuous mode, and all-multi behavior. |
|
2293 **/ |
|
2294 |
|
2295 static void e1000_set_rx_mode(struct net_device *netdev) |
|
2296 { |
|
2297 struct e1000_adapter *adapter = netdev_priv(netdev); |
|
2298 struct e1000_hw *hw = &adapter->hw; |
|
2299 struct netdev_hw_addr *ha; |
|
2300 bool use_uc = false; |
|
2301 u32 rctl; |
|
2302 u32 hash_value; |
|
2303 int i, rar_entries = E1000_RAR_ENTRIES; |
|
2304 int mta_reg_count = E1000_NUM_MTA_REGISTERS; |
|
2305 u32 *mcarray = kcalloc(mta_reg_count, sizeof(u32), GFP_ATOMIC); |
|
2306 |
|
2307 if (!mcarray) { |
|
2308 e_err(probe, "memory allocation failed\n"); |
|
2309 return; |
|
2310 } |
|
2311 |
|
2312 /* Check for Promiscuous and All Multicast modes */ |
|
2313 |
|
2314 rctl = er32(RCTL); |
|
2315 |
|
2316 if (netdev->flags & IFF_PROMISC) { |
|
2317 rctl |= (E1000_RCTL_UPE | E1000_RCTL_MPE); |
|
2318 rctl &= ~E1000_RCTL_VFE; |
|
2319 } else { |
|
2320 if (netdev->flags & IFF_ALLMULTI) |
|
2321 rctl |= E1000_RCTL_MPE; |
|
2322 else |
|
2323 rctl &= ~E1000_RCTL_MPE; |
|
2324 /* Enable VLAN filter if there is a VLAN */ |
|
2325 if (e1000_vlan_used(adapter)) |
|
2326 rctl |= E1000_RCTL_VFE; |
|
2327 } |
|
2328 |
|
2329 if (netdev_uc_count(netdev) > rar_entries - 1) { |
|
2330 rctl |= E1000_RCTL_UPE; |
|
2331 } else if (!(netdev->flags & IFF_PROMISC)) { |
|
2332 rctl &= ~E1000_RCTL_UPE; |
|
2333 use_uc = true; |
|
2334 } |
|
2335 |
|
2336 ew32(RCTL, rctl); |
|
2337 |
|
2338 /* 82542 2.0 needs to be in reset to write receive address registers */ |
|
2339 |
|
2340 if (hw->mac_type == e1000_82542_rev2_0) |
|
2341 e1000_enter_82542_rst(adapter); |
|
2342 |
|
2343 /* load the first 14 addresses into the exact filters 1-14. Unicast |
|
2344 * addresses take precedence to avoid disabling unicast filtering |
|
2345 * when possible. |
|
2346 * |
|
2347 * RAR 0 is used for the station MAC address |
|
2348 * if there are not 14 addresses, go ahead and clear the filters |
|
2349 */ |
|
2350 i = 1; |
|
2351 if (use_uc) |
|
2352 netdev_for_each_uc_addr(ha, netdev) { |
|
2353 if (i == rar_entries) |
|
2354 break; |
|
2355 e1000_rar_set(hw, ha->addr, i++); |
|
2356 } |
|
2357 |
|
2358 netdev_for_each_mc_addr(ha, netdev) { |
|
2359 if (i == rar_entries) { |
|
2360 /* load any remaining addresses into the hash table */ |
|
2361 u32 hash_reg, hash_bit, mta; |
|
2362 hash_value = e1000_hash_mc_addr(hw, ha->addr); |
|
2363 hash_reg = (hash_value >> 5) & 0x7F; |
|
2364 hash_bit = hash_value & 0x1F; |
|
2365 mta = (1 << hash_bit); |
|
2366 mcarray[hash_reg] |= mta; |
|
2367 } else { |
|
2368 e1000_rar_set(hw, ha->addr, i++); |
|
2369 } |
|
2370 } |
|
2371 |
|
2372 for (; i < rar_entries; i++) { |
|
2373 E1000_WRITE_REG_ARRAY(hw, RA, i << 1, 0); |
|
2374 E1000_WRITE_FLUSH(); |
|
2375 E1000_WRITE_REG_ARRAY(hw, RA, (i << 1) + 1, 0); |
|
2376 E1000_WRITE_FLUSH(); |
|
2377 } |
|
2378 |
|
2379 /* write the hash table completely, write from bottom to avoid |
|
2380 * both stupid write combining chipsets, and flushing each write */ |
|
2381 for (i = mta_reg_count - 1; i >= 0 ; i--) { |
|
2382 /* |
|
2383 * If we are on an 82544 has an errata where writing odd |
|
2384 * offsets overwrites the previous even offset, but writing |
|
2385 * backwards over the range solves the issue by always |
|
2386 * writing the odd offset first |
|
2387 */ |
|
2388 E1000_WRITE_REG_ARRAY(hw, MTA, i, mcarray[i]); |
|
2389 } |
|
2390 E1000_WRITE_FLUSH(); |
|
2391 |
|
2392 if (hw->mac_type == e1000_82542_rev2_0) |
|
2393 e1000_leave_82542_rst(adapter); |
|
2394 |
|
2395 kfree(mcarray); |
|
2396 } |
|
2397 |
|
2398 /** |
|
2399 * e1000_update_phy_info_task - get phy info |
|
2400 * @work: work struct contained inside adapter struct |
|
2401 * |
|
2402 * Need to wait a few seconds after link up to get diagnostic information from |
|
2403 * the phy |
|
2404 */ |
|
2405 static void e1000_update_phy_info_task(struct work_struct *work) |
|
2406 { |
|
2407 struct e1000_adapter *adapter = container_of(work, |
|
2408 struct e1000_adapter, |
|
2409 phy_info_task.work); |
|
2410 if (test_bit(__E1000_DOWN, &adapter->flags)) |
|
2411 return; |
|
2412 mutex_lock(&adapter->mutex); |
|
2413 e1000_phy_get_info(&adapter->hw, &adapter->phy_info); |
|
2414 mutex_unlock(&adapter->mutex); |
|
2415 } |
|
2416 |
|
2417 /** |
|
2418 * e1000_82547_tx_fifo_stall_task - task to complete work |
|
2419 * @work: work struct contained inside adapter struct |
|
2420 **/ |
|
2421 static void e1000_82547_tx_fifo_stall_task(struct work_struct *work) |
|
2422 { |
|
2423 struct e1000_adapter *adapter = container_of(work, |
|
2424 struct e1000_adapter, |
|
2425 fifo_stall_task.work); |
|
2426 struct e1000_hw *hw = &adapter->hw; |
|
2427 struct net_device *netdev = adapter->netdev; |
|
2428 u32 tctl; |
|
2429 |
|
2430 if (test_bit(__E1000_DOWN, &adapter->flags)) |
|
2431 return; |
|
2432 mutex_lock(&adapter->mutex); |
|
2433 if (atomic_read(&adapter->tx_fifo_stall)) { |
|
2434 if ((er32(TDT) == er32(TDH)) && |
|
2435 (er32(TDFT) == er32(TDFH)) && |
|
2436 (er32(TDFTS) == er32(TDFHS))) { |
|
2437 tctl = er32(TCTL); |
|
2438 ew32(TCTL, tctl & ~E1000_TCTL_EN); |
|
2439 ew32(TDFT, adapter->tx_head_addr); |
|
2440 ew32(TDFH, adapter->tx_head_addr); |
|
2441 ew32(TDFTS, adapter->tx_head_addr); |
|
2442 ew32(TDFHS, adapter->tx_head_addr); |
|
2443 ew32(TCTL, tctl); |
|
2444 E1000_WRITE_FLUSH(); |
|
2445 |
|
2446 adapter->tx_fifo_head = 0; |
|
2447 atomic_set(&adapter->tx_fifo_stall, 0); |
|
2448 netif_wake_queue(netdev); |
|
2449 } else if (!test_bit(__E1000_DOWN, &adapter->flags)) { |
|
2450 schedule_delayed_work(&adapter->fifo_stall_task, 1); |
|
2451 } |
|
2452 } |
|
2453 mutex_unlock(&adapter->mutex); |
|
2454 } |
|
2455 |
|
2456 bool e1000_has_link(struct e1000_adapter *adapter) |
|
2457 { |
|
2458 struct e1000_hw *hw = &adapter->hw; |
|
2459 bool link_active = false; |
|
2460 |
|
2461 /* get_link_status is set on LSC (link status) interrupt or rx |
|
2462 * sequence error interrupt (except on intel ce4100). |
|
2463 * get_link_status will stay false until the |
|
2464 * e1000_check_for_link establishes link for copper adapters |
|
2465 * ONLY |
|
2466 */ |
|
2467 switch (hw->media_type) { |
|
2468 case e1000_media_type_copper: |
|
2469 if (hw->mac_type == e1000_ce4100) |
|
2470 hw->get_link_status = 1; |
|
2471 if (hw->get_link_status) { |
|
2472 e1000_check_for_link(hw); |
|
2473 link_active = !hw->get_link_status; |
|
2474 } else { |
|
2475 link_active = true; |
|
2476 } |
|
2477 break; |
|
2478 case e1000_media_type_fiber: |
|
2479 e1000_check_for_link(hw); |
|
2480 link_active = !!(er32(STATUS) & E1000_STATUS_LU); |
|
2481 break; |
|
2482 case e1000_media_type_internal_serdes: |
|
2483 e1000_check_for_link(hw); |
|
2484 link_active = hw->serdes_has_link; |
|
2485 break; |
|
2486 default: |
|
2487 break; |
|
2488 } |
|
2489 |
|
2490 return link_active; |
|
2491 } |
|
2492 |
|
2493 /** |
|
2494 * e1000_watchdog - work function |
|
2495 * @work: work struct contained inside adapter struct |
|
2496 **/ |
|
2497 static void e1000_watchdog(struct work_struct *work) |
|
2498 { |
|
2499 struct e1000_adapter *adapter = container_of(work, |
|
2500 struct e1000_adapter, |
|
2501 watchdog_task.work); |
|
2502 struct e1000_hw *hw = &adapter->hw; |
|
2503 struct net_device *netdev = adapter->netdev; |
|
2504 struct e1000_tx_ring *txdr = adapter->tx_ring; |
|
2505 u32 link, tctl; |
|
2506 |
|
2507 if (test_bit(__E1000_DOWN, &adapter->flags)) |
|
2508 return; |
|
2509 |
|
2510 mutex_lock(&adapter->mutex); |
|
2511 link = e1000_has_link(adapter); |
|
2512 if (!adapter->ecdev && (netif_carrier_ok(netdev)) && link) |
|
2513 goto link_up; |
|
2514 |
|
2515 if (link) { |
|
2516 if ((adapter->ecdev && !ecdev_get_link(adapter->ecdev)) |
|
2517 || (!adapter->ecdev && !netif_carrier_ok(netdev))) { |
|
2518 u32 ctrl; |
|
2519 bool txb2b __attribute__ ((unused)) = true; |
|
2520 /* update snapshot of PHY registers on LSC */ |
|
2521 e1000_get_speed_and_duplex(hw, |
|
2522 &adapter->link_speed, |
|
2523 &adapter->link_duplex); |
|
2524 |
|
2525 ctrl = er32(CTRL); |
|
2526 pr_info("%s NIC Link is Up %d Mbps %s, " |
|
2527 "Flow Control: %s\n", |
|
2528 netdev->name, |
|
2529 adapter->link_speed, |
|
2530 adapter->link_duplex == FULL_DUPLEX ? |
|
2531 "Full Duplex" : "Half Duplex", |
|
2532 ((ctrl & E1000_CTRL_TFCE) && (ctrl & |
|
2533 E1000_CTRL_RFCE)) ? "RX/TX" : ((ctrl & |
|
2534 E1000_CTRL_RFCE) ? "RX" : ((ctrl & |
|
2535 E1000_CTRL_TFCE) ? "TX" : "None"))); |
|
2536 |
|
2537 /* adjust timeout factor according to speed/duplex */ |
|
2538 adapter->tx_timeout_factor = 1; |
|
2539 switch (adapter->link_speed) { |
|
2540 case SPEED_10: |
|
2541 txb2b = false; |
|
2542 adapter->tx_timeout_factor = 16; |
|
2543 break; |
|
2544 case SPEED_100: |
|
2545 txb2b = false; |
|
2546 /* maybe add some timeout factor ? */ |
|
2547 break; |
|
2548 } |
|
2549 |
|
2550 /* enable transmits in the hardware */ |
|
2551 tctl = er32(TCTL); |
|
2552 tctl |= E1000_TCTL_EN; |
|
2553 ew32(TCTL, tctl); |
|
2554 |
|
2555 if (adapter->ecdev) { |
|
2556 ecdev_set_link(adapter->ecdev, 1); |
|
2557 } |
|
2558 else { |
|
2559 netif_carrier_on(netdev); |
|
2560 if (!test_bit(__E1000_DOWN, &adapter->flags)) |
|
2561 schedule_delayed_work(&adapter->phy_info_task, |
|
2562 2 * HZ); |
|
2563 } |
|
2564 adapter->smartspeed = 0; |
|
2565 } |
|
2566 } else { |
|
2567 if ((adapter->ecdev && ecdev_get_link(adapter->ecdev)) |
|
2568 || (!adapter->ecdev && netif_carrier_ok(netdev))) { |
|
2569 adapter->link_speed = 0; |
|
2570 adapter->link_duplex = 0; |
|
2571 pr_info("%s NIC Link is Down\n", |
|
2572 netdev->name); |
|
2573 |
|
2574 if (adapter->ecdev) { |
|
2575 ecdev_set_link(adapter->ecdev, 0); |
|
2576 } else { |
|
2577 netif_carrier_off(netdev); |
|
2578 |
|
2579 if (!test_bit(__E1000_DOWN, &adapter->flags)) |
|
2580 schedule_delayed_work(&adapter->phy_info_task, |
|
2581 2 * HZ); |
|
2582 } |
|
2583 } |
|
2584 |
|
2585 e1000_smartspeed(adapter); |
|
2586 } |
|
2587 |
|
2588 link_up: |
|
2589 e1000_update_stats(adapter); |
|
2590 |
|
2591 hw->tx_packet_delta = adapter->stats.tpt - adapter->tpt_old; |
|
2592 adapter->tpt_old = adapter->stats.tpt; |
|
2593 hw->collision_delta = adapter->stats.colc - adapter->colc_old; |
|
2594 adapter->colc_old = adapter->stats.colc; |
|
2595 |
|
2596 adapter->gorcl = adapter->stats.gorcl - adapter->gorcl_old; |
|
2597 adapter->gorcl_old = adapter->stats.gorcl; |
|
2598 adapter->gotcl = adapter->stats.gotcl - adapter->gotcl_old; |
|
2599 adapter->gotcl_old = adapter->stats.gotcl; |
|
2600 |
|
2601 e1000_update_adaptive(hw); |
|
2602 |
|
2603 if (!adapter->ecdev && !netif_carrier_ok(netdev)) { |
|
2604 if (E1000_DESC_UNUSED(txdr) + 1 < txdr->count) { |
|
2605 /* We've lost link, so the controller stops DMA, |
|
2606 * but we've got queued Tx work that's never going |
|
2607 * to get done, so reset controller to flush Tx. |
|
2608 * (Do the reset outside of interrupt context). */ |
|
2609 adapter->tx_timeout_count++; |
|
2610 schedule_work(&adapter->reset_task); |
|
2611 /* exit immediately since reset is imminent */ |
|
2612 goto unlock; |
|
2613 } |
|
2614 } |
|
2615 |
|
2616 /* Simple mode for Interrupt Throttle Rate (ITR) */ |
|
2617 if (hw->mac_type >= e1000_82540 && adapter->itr_setting == 4) { |
|
2618 /* |
|
2619 * Symmetric Tx/Rx gets a reduced ITR=2000; |
|
2620 * Total asymmetrical Tx or Rx gets ITR=8000; |
|
2621 * everyone else is between 2000-8000. |
|
2622 */ |
|
2623 u32 goc = (adapter->gotcl + adapter->gorcl) / 10000; |
|
2624 u32 dif = (adapter->gotcl > adapter->gorcl ? |
|
2625 adapter->gotcl - adapter->gorcl : |
|
2626 adapter->gorcl - adapter->gotcl) / 10000; |
|
2627 u32 itr = goc > 0 ? (dif * 6000 / goc + 2000) : 8000; |
|
2628 |
|
2629 ew32(ITR, 1000000000 / (itr * 256)); |
|
2630 } |
|
2631 |
|
2632 /* Cause software interrupt to ensure rx ring is cleaned */ |
|
2633 ew32(ICS, E1000_ICS_RXDMT0); |
|
2634 |
|
2635 /* Force detection of hung controller every watchdog period */ |
|
2636 adapter->detect_tx_hung = true; |
|
2637 |
|
2638 /* Reschedule the task */ |
|
2639 if (!adapter->ecdev && !test_bit(__E1000_DOWN, &adapter->flags)) |
|
2640 schedule_delayed_work(&adapter->watchdog_task, 2 * HZ); |
|
2641 |
|
2642 unlock: |
|
2643 mutex_unlock(&adapter->mutex); |
|
2644 } |
|
2645 |
|
2646 enum latency_range { |
|
2647 lowest_latency = 0, |
|
2648 low_latency = 1, |
|
2649 bulk_latency = 2, |
|
2650 latency_invalid = 255 |
|
2651 }; |
|
2652 |
|
2653 /** |
|
2654 * e1000_update_itr - update the dynamic ITR value based on statistics |
|
2655 * @adapter: pointer to adapter |
|
2656 * @itr_setting: current adapter->itr |
|
2657 * @packets: the number of packets during this measurement interval |
|
2658 * @bytes: the number of bytes during this measurement interval |
|
2659 * |
|
2660 * Stores a new ITR value based on packets and byte |
|
2661 * counts during the last interrupt. The advantage of per interrupt |
|
2662 * computation is faster updates and more accurate ITR for the current |
|
2663 * traffic pattern. Constants in this function were computed |
|
2664 * based on theoretical maximum wire speed and thresholds were set based |
|
2665 * on testing data as well as attempting to minimize response time |
|
2666 * while increasing bulk throughput. |
|
2667 * this functionality is controlled by the InterruptThrottleRate module |
|
2668 * parameter (see e1000_param.c) |
|
2669 **/ |
|
2670 static unsigned int e1000_update_itr(struct e1000_adapter *adapter, |
|
2671 u16 itr_setting, int packets, int bytes) |
|
2672 { |
|
2673 unsigned int retval = itr_setting; |
|
2674 struct e1000_hw *hw = &adapter->hw; |
|
2675 |
|
2676 if (unlikely(hw->mac_type < e1000_82540)) |
|
2677 goto update_itr_done; |
|
2678 |
|
2679 if (packets == 0) |
|
2680 goto update_itr_done; |
|
2681 |
|
2682 switch (itr_setting) { |
|
2683 case lowest_latency: |
|
2684 /* jumbo frames get bulk treatment*/ |
|
2685 if (bytes/packets > 8000) |
|
2686 retval = bulk_latency; |
|
2687 else if ((packets < 5) && (bytes > 512)) |
|
2688 retval = low_latency; |
|
2689 break; |
|
2690 case low_latency: /* 50 usec aka 20000 ints/s */ |
|
2691 if (bytes > 10000) { |
|
2692 /* jumbo frames need bulk latency setting */ |
|
2693 if (bytes/packets > 8000) |
|
2694 retval = bulk_latency; |
|
2695 else if ((packets < 10) || ((bytes/packets) > 1200)) |
|
2696 retval = bulk_latency; |
|
2697 else if ((packets > 35)) |
|
2698 retval = lowest_latency; |
|
2699 } else if (bytes/packets > 2000) |
|
2700 retval = bulk_latency; |
|
2701 else if (packets <= 2 && bytes < 512) |
|
2702 retval = lowest_latency; |
|
2703 break; |
|
2704 case bulk_latency: /* 250 usec aka 4000 ints/s */ |
|
2705 if (bytes > 25000) { |
|
2706 if (packets > 35) |
|
2707 retval = low_latency; |
|
2708 } else if (bytes < 6000) { |
|
2709 retval = low_latency; |
|
2710 } |
|
2711 break; |
|
2712 } |
|
2713 |
|
2714 update_itr_done: |
|
2715 return retval; |
|
2716 } |
|
2717 |
|
2718 static void e1000_set_itr(struct e1000_adapter *adapter) |
|
2719 { |
|
2720 struct e1000_hw *hw = &adapter->hw; |
|
2721 u16 current_itr; |
|
2722 u32 new_itr = adapter->itr; |
|
2723 |
|
2724 if (unlikely(hw->mac_type < e1000_82540)) |
|
2725 return; |
|
2726 |
|
2727 /* for non-gigabit speeds, just fix the interrupt rate at 4000 */ |
|
2728 if (unlikely(adapter->link_speed != SPEED_1000)) { |
|
2729 current_itr = 0; |
|
2730 new_itr = 4000; |
|
2731 goto set_itr_now; |
|
2732 } |
|
2733 |
|
2734 adapter->tx_itr = e1000_update_itr(adapter, |
|
2735 adapter->tx_itr, |
|
2736 adapter->total_tx_packets, |
|
2737 adapter->total_tx_bytes); |
|
2738 /* conservative mode (itr 3) eliminates the lowest_latency setting */ |
|
2739 if (adapter->itr_setting == 3 && adapter->tx_itr == lowest_latency) |
|
2740 adapter->tx_itr = low_latency; |
|
2741 |
|
2742 adapter->rx_itr = e1000_update_itr(adapter, |
|
2743 adapter->rx_itr, |
|
2744 adapter->total_rx_packets, |
|
2745 adapter->total_rx_bytes); |
|
2746 /* conservative mode (itr 3) eliminates the lowest_latency setting */ |
|
2747 if (adapter->itr_setting == 3 && adapter->rx_itr == lowest_latency) |
|
2748 adapter->rx_itr = low_latency; |
|
2749 |
|
2750 current_itr = max(adapter->rx_itr, adapter->tx_itr); |
|
2751 |
|
2752 switch (current_itr) { |
|
2753 /* counts and packets in update_itr are dependent on these numbers */ |
|
2754 case lowest_latency: |
|
2755 new_itr = 70000; |
|
2756 break; |
|
2757 case low_latency: |
|
2758 new_itr = 20000; /* aka hwitr = ~200 */ |
|
2759 break; |
|
2760 case bulk_latency: |
|
2761 new_itr = 4000; |
|
2762 break; |
|
2763 default: |
|
2764 break; |
|
2765 } |
|
2766 |
|
2767 set_itr_now: |
|
2768 if (new_itr != adapter->itr) { |
|
2769 /* this attempts to bias the interrupt rate towards Bulk |
|
2770 * by adding intermediate steps when interrupt rate is |
|
2771 * increasing */ |
|
2772 new_itr = new_itr > adapter->itr ? |
|
2773 min(adapter->itr + (new_itr >> 2), new_itr) : |
|
2774 new_itr; |
|
2775 adapter->itr = new_itr; |
|
2776 ew32(ITR, 1000000000 / (new_itr * 256)); |
|
2777 } |
|
2778 } |
|
2779 |
|
2780 #define E1000_TX_FLAGS_CSUM 0x00000001 |
|
2781 #define E1000_TX_FLAGS_VLAN 0x00000002 |
|
2782 #define E1000_TX_FLAGS_TSO 0x00000004 |
|
2783 #define E1000_TX_FLAGS_IPV4 0x00000008 |
|
2784 #define E1000_TX_FLAGS_NO_FCS 0x00000010 |
|
2785 #define E1000_TX_FLAGS_VLAN_MASK 0xffff0000 |
|
2786 #define E1000_TX_FLAGS_VLAN_SHIFT 16 |
|
2787 |
|
2788 static int e1000_tso(struct e1000_adapter *adapter, |
|
2789 struct e1000_tx_ring *tx_ring, struct sk_buff *skb) |
|
2790 { |
|
2791 struct e1000_context_desc *context_desc; |
|
2792 struct e1000_buffer *buffer_info; |
|
2793 unsigned int i; |
|
2794 u32 cmd_length = 0; |
|
2795 u16 ipcse = 0, tucse, mss; |
|
2796 u8 ipcss, ipcso, tucss, tucso, hdr_len; |
|
2797 int err; |
|
2798 |
|
2799 if (skb_is_gso(skb)) { |
|
2800 if (skb_header_cloned(skb)) { |
|
2801 err = pskb_expand_head(skb, 0, 0, GFP_ATOMIC); |
|
2802 if (err) |
|
2803 return err; |
|
2804 } |
|
2805 |
|
2806 hdr_len = skb_transport_offset(skb) + tcp_hdrlen(skb); |
|
2807 mss = skb_shinfo(skb)->gso_size; |
|
2808 if (skb->protocol == htons(ETH_P_IP)) { |
|
2809 struct iphdr *iph = ip_hdr(skb); |
|
2810 iph->tot_len = 0; |
|
2811 iph->check = 0; |
|
2812 tcp_hdr(skb)->check = ~csum_tcpudp_magic(iph->saddr, |
|
2813 iph->daddr, 0, |
|
2814 IPPROTO_TCP, |
|
2815 0); |
|
2816 cmd_length = E1000_TXD_CMD_IP; |
|
2817 ipcse = skb_transport_offset(skb) - 1; |
|
2818 } else if (skb->protocol == htons(ETH_P_IPV6)) { |
|
2819 ipv6_hdr(skb)->payload_len = 0; |
|
2820 tcp_hdr(skb)->check = |
|
2821 ~csum_ipv6_magic(&ipv6_hdr(skb)->saddr, |
|
2822 &ipv6_hdr(skb)->daddr, |
|
2823 0, IPPROTO_TCP, 0); |
|
2824 ipcse = 0; |
|
2825 } |
|
2826 ipcss = skb_network_offset(skb); |
|
2827 ipcso = (void *)&(ip_hdr(skb)->check) - (void *)skb->data; |
|
2828 tucss = skb_transport_offset(skb); |
|
2829 tucso = (void *)&(tcp_hdr(skb)->check) - (void *)skb->data; |
|
2830 tucse = 0; |
|
2831 |
|
2832 cmd_length |= (E1000_TXD_CMD_DEXT | E1000_TXD_CMD_TSE | |
|
2833 E1000_TXD_CMD_TCP | (skb->len - (hdr_len))); |
|
2834 |
|
2835 i = tx_ring->next_to_use; |
|
2836 context_desc = E1000_CONTEXT_DESC(*tx_ring, i); |
|
2837 buffer_info = &tx_ring->buffer_info[i]; |
|
2838 |
|
2839 context_desc->lower_setup.ip_fields.ipcss = ipcss; |
|
2840 context_desc->lower_setup.ip_fields.ipcso = ipcso; |
|
2841 context_desc->lower_setup.ip_fields.ipcse = cpu_to_le16(ipcse); |
|
2842 context_desc->upper_setup.tcp_fields.tucss = tucss; |
|
2843 context_desc->upper_setup.tcp_fields.tucso = tucso; |
|
2844 context_desc->upper_setup.tcp_fields.tucse = cpu_to_le16(tucse); |
|
2845 context_desc->tcp_seg_setup.fields.mss = cpu_to_le16(mss); |
|
2846 context_desc->tcp_seg_setup.fields.hdr_len = hdr_len; |
|
2847 context_desc->cmd_and_length = cpu_to_le32(cmd_length); |
|
2848 |
|
2849 buffer_info->time_stamp = jiffies; |
|
2850 buffer_info->next_to_watch = i; |
|
2851 |
|
2852 if (++i == tx_ring->count) i = 0; |
|
2853 tx_ring->next_to_use = i; |
|
2854 |
|
2855 return true; |
|
2856 } |
|
2857 return false; |
|
2858 } |
|
2859 |
|
2860 static bool e1000_tx_csum(struct e1000_adapter *adapter, |
|
2861 struct e1000_tx_ring *tx_ring, struct sk_buff *skb) |
|
2862 { |
|
2863 struct e1000_context_desc *context_desc; |
|
2864 struct e1000_buffer *buffer_info; |
|
2865 unsigned int i; |
|
2866 u8 css; |
|
2867 u32 cmd_len = E1000_TXD_CMD_DEXT; |
|
2868 |
|
2869 if (skb->ip_summed != CHECKSUM_PARTIAL) |
|
2870 return false; |
|
2871 |
|
2872 switch (skb->protocol) { |
|
2873 case cpu_to_be16(ETH_P_IP): |
|
2874 if (ip_hdr(skb)->protocol == IPPROTO_TCP) |
|
2875 cmd_len |= E1000_TXD_CMD_TCP; |
|
2876 break; |
|
2877 case cpu_to_be16(ETH_P_IPV6): |
|
2878 /* XXX not handling all IPV6 headers */ |
|
2879 if (ipv6_hdr(skb)->nexthdr == IPPROTO_TCP) |
|
2880 cmd_len |= E1000_TXD_CMD_TCP; |
|
2881 break; |
|
2882 default: |
|
2883 if (unlikely(net_ratelimit())) |
|
2884 e_warn(drv, "checksum_partial proto=%x!\n", |
|
2885 skb->protocol); |
|
2886 break; |
|
2887 } |
|
2888 |
|
2889 css = skb_checksum_start_offset(skb); |
|
2890 |
|
2891 i = tx_ring->next_to_use; |
|
2892 buffer_info = &tx_ring->buffer_info[i]; |
|
2893 context_desc = E1000_CONTEXT_DESC(*tx_ring, i); |
|
2894 |
|
2895 context_desc->lower_setup.ip_config = 0; |
|
2896 context_desc->upper_setup.tcp_fields.tucss = css; |
|
2897 context_desc->upper_setup.tcp_fields.tucso = |
|
2898 css + skb->csum_offset; |
|
2899 context_desc->upper_setup.tcp_fields.tucse = 0; |
|
2900 context_desc->tcp_seg_setup.data = 0; |
|
2901 context_desc->cmd_and_length = cpu_to_le32(cmd_len); |
|
2902 |
|
2903 buffer_info->time_stamp = jiffies; |
|
2904 buffer_info->next_to_watch = i; |
|
2905 |
|
2906 if (unlikely(++i == tx_ring->count)) i = 0; |
|
2907 tx_ring->next_to_use = i; |
|
2908 |
|
2909 return true; |
|
2910 } |
|
2911 |
|
2912 #define E1000_MAX_TXD_PWR 12 |
|
2913 #define E1000_MAX_DATA_PER_TXD (1<<E1000_MAX_TXD_PWR) |
|
2914 |
|
2915 static int e1000_tx_map(struct e1000_adapter *adapter, |
|
2916 struct e1000_tx_ring *tx_ring, |
|
2917 struct sk_buff *skb, unsigned int first, |
|
2918 unsigned int max_per_txd, unsigned int nr_frags, |
|
2919 unsigned int mss) |
|
2920 { |
|
2921 struct e1000_hw *hw = &adapter->hw; |
|
2922 struct pci_dev *pdev = adapter->pdev; |
|
2923 struct e1000_buffer *buffer_info; |
|
2924 unsigned int len = skb_headlen(skb); |
|
2925 unsigned int offset = 0, size, count = 0, i; |
|
2926 unsigned int f, bytecount, segs; |
|
2927 |
|
2928 i = tx_ring->next_to_use; |
|
2929 |
|
2930 while (len) { |
|
2931 buffer_info = &tx_ring->buffer_info[i]; |
|
2932 size = min(len, max_per_txd); |
|
2933 /* Workaround for Controller erratum -- |
|
2934 * descriptor for non-tso packet in a linear SKB that follows a |
|
2935 * tso gets written back prematurely before the data is fully |
|
2936 * DMA'd to the controller */ |
|
2937 if (!skb->data_len && tx_ring->last_tx_tso && |
|
2938 !skb_is_gso(skb)) { |
|
2939 tx_ring->last_tx_tso = false; |
|
2940 size -= 4; |
|
2941 } |
|
2942 |
|
2943 /* Workaround for premature desc write-backs |
|
2944 * in TSO mode. Append 4-byte sentinel desc */ |
|
2945 if (unlikely(mss && !nr_frags && size == len && size > 8)) |
|
2946 size -= 4; |
|
2947 /* work-around for errata 10 and it applies |
|
2948 * to all controllers in PCI-X mode |
|
2949 * The fix is to make sure that the first descriptor of a |
|
2950 * packet is smaller than 2048 - 16 - 16 (or 2016) bytes |
|
2951 */ |
|
2952 if (unlikely((hw->bus_type == e1000_bus_type_pcix) && |
|
2953 (size > 2015) && count == 0)) |
|
2954 size = 2015; |
|
2955 |
|
2956 /* Workaround for potential 82544 hang in PCI-X. Avoid |
|
2957 * terminating buffers within evenly-aligned dwords. */ |
|
2958 if (unlikely(adapter->pcix_82544 && |
|
2959 !((unsigned long)(skb->data + offset + size - 1) & 4) && |
|
2960 size > 4)) |
|
2961 size -= 4; |
|
2962 |
|
2963 buffer_info->length = size; |
|
2964 /* set time_stamp *before* dma to help avoid a possible race */ |
|
2965 buffer_info->time_stamp = jiffies; |
|
2966 buffer_info->mapped_as_page = false; |
|
2967 buffer_info->dma = dma_map_single(&pdev->dev, |
|
2968 skb->data + offset, |
|
2969 size, DMA_TO_DEVICE); |
|
2970 if (dma_mapping_error(&pdev->dev, buffer_info->dma)) |
|
2971 goto dma_error; |
|
2972 buffer_info->next_to_watch = i; |
|
2973 |
|
2974 len -= size; |
|
2975 offset += size; |
|
2976 count++; |
|
2977 if (len) { |
|
2978 i++; |
|
2979 if (unlikely(i == tx_ring->count)) |
|
2980 i = 0; |
|
2981 } |
|
2982 } |
|
2983 |
|
2984 for (f = 0; f < nr_frags; f++) { |
|
2985 const struct skb_frag_struct *frag; |
|
2986 |
|
2987 frag = &skb_shinfo(skb)->frags[f]; |
|
2988 len = skb_frag_size(frag); |
|
2989 offset = 0; |
|
2990 |
|
2991 while (len) { |
|
2992 unsigned long bufend; |
|
2993 i++; |
|
2994 if (unlikely(i == tx_ring->count)) |
|
2995 i = 0; |
|
2996 |
|
2997 buffer_info = &tx_ring->buffer_info[i]; |
|
2998 size = min(len, max_per_txd); |
|
2999 /* Workaround for premature desc write-backs |
|
3000 * in TSO mode. Append 4-byte sentinel desc */ |
|
3001 if (unlikely(mss && f == (nr_frags-1) && size == len && size > 8)) |
|
3002 size -= 4; |
|
3003 /* Workaround for potential 82544 hang in PCI-X. |
|
3004 * Avoid terminating buffers within evenly-aligned |
|
3005 * dwords. */ |
|
3006 bufend = (unsigned long) |
|
3007 page_to_phys(skb_frag_page(frag)); |
|
3008 bufend += offset + size - 1; |
|
3009 if (unlikely(adapter->pcix_82544 && |
|
3010 !(bufend & 4) && |
|
3011 size > 4)) |
|
3012 size -= 4; |
|
3013 |
|
3014 buffer_info->length = size; |
|
3015 buffer_info->time_stamp = jiffies; |
|
3016 buffer_info->mapped_as_page = true; |
|
3017 buffer_info->dma = skb_frag_dma_map(&pdev->dev, frag, |
|
3018 offset, size, DMA_TO_DEVICE); |
|
3019 if (dma_mapping_error(&pdev->dev, buffer_info->dma)) |
|
3020 goto dma_error; |
|
3021 buffer_info->next_to_watch = i; |
|
3022 |
|
3023 len -= size; |
|
3024 offset += size; |
|
3025 count++; |
|
3026 } |
|
3027 } |
|
3028 |
|
3029 segs = skb_shinfo(skb)->gso_segs ?: 1; |
|
3030 /* multiply data chunks by size of headers */ |
|
3031 bytecount = ((segs - 1) * skb_headlen(skb)) + skb->len; |
|
3032 |
|
3033 tx_ring->buffer_info[i].skb = skb; |
|
3034 tx_ring->buffer_info[i].segs = segs; |
|
3035 tx_ring->buffer_info[i].bytecount = bytecount; |
|
3036 tx_ring->buffer_info[first].next_to_watch = i; |
|
3037 |
|
3038 return count; |
|
3039 |
|
3040 dma_error: |
|
3041 dev_err(&pdev->dev, "TX DMA map failed\n"); |
|
3042 buffer_info->dma = 0; |
|
3043 if (count) |
|
3044 count--; |
|
3045 |
|
3046 while (count--) { |
|
3047 if (i==0) |
|
3048 i += tx_ring->count; |
|
3049 i--; |
|
3050 buffer_info = &tx_ring->buffer_info[i]; |
|
3051 e1000_unmap_and_free_tx_resource(adapter, buffer_info); |
|
3052 } |
|
3053 |
|
3054 return 0; |
|
3055 } |
|
3056 |
|
3057 static void e1000_tx_queue(struct e1000_adapter *adapter, |
|
3058 struct e1000_tx_ring *tx_ring, int tx_flags, |
|
3059 int count) |
|
3060 { |
|
3061 struct e1000_hw *hw = &adapter->hw; |
|
3062 struct e1000_tx_desc *tx_desc = NULL; |
|
3063 struct e1000_buffer *buffer_info; |
|
3064 u32 txd_upper = 0, txd_lower = E1000_TXD_CMD_IFCS; |
|
3065 unsigned int i; |
|
3066 |
|
3067 if (likely(tx_flags & E1000_TX_FLAGS_TSO)) { |
|
3068 txd_lower |= E1000_TXD_CMD_DEXT | E1000_TXD_DTYP_D | |
|
3069 E1000_TXD_CMD_TSE; |
|
3070 txd_upper |= E1000_TXD_POPTS_TXSM << 8; |
|
3071 |
|
3072 if (likely(tx_flags & E1000_TX_FLAGS_IPV4)) |
|
3073 txd_upper |= E1000_TXD_POPTS_IXSM << 8; |
|
3074 } |
|
3075 |
|
3076 if (likely(tx_flags & E1000_TX_FLAGS_CSUM)) { |
|
3077 txd_lower |= E1000_TXD_CMD_DEXT | E1000_TXD_DTYP_D; |
|
3078 txd_upper |= E1000_TXD_POPTS_TXSM << 8; |
|
3079 } |
|
3080 |
|
3081 if (unlikely(tx_flags & E1000_TX_FLAGS_VLAN)) { |
|
3082 txd_lower |= E1000_TXD_CMD_VLE; |
|
3083 txd_upper |= (tx_flags & E1000_TX_FLAGS_VLAN_MASK); |
|
3084 } |
|
3085 |
|
3086 if (unlikely(tx_flags & E1000_TX_FLAGS_NO_FCS)) |
|
3087 txd_lower &= ~(E1000_TXD_CMD_IFCS); |
|
3088 |
|
3089 i = tx_ring->next_to_use; |
|
3090 |
|
3091 while (count--) { |
|
3092 buffer_info = &tx_ring->buffer_info[i]; |
|
3093 tx_desc = E1000_TX_DESC(*tx_ring, i); |
|
3094 tx_desc->buffer_addr = cpu_to_le64(buffer_info->dma); |
|
3095 tx_desc->lower.data = |
|
3096 cpu_to_le32(txd_lower | buffer_info->length); |
|
3097 tx_desc->upper.data = cpu_to_le32(txd_upper); |
|
3098 if (unlikely(++i == tx_ring->count)) i = 0; |
|
3099 } |
|
3100 |
|
3101 tx_desc->lower.data |= cpu_to_le32(adapter->txd_cmd); |
|
3102 |
|
3103 /* txd_cmd re-enables FCS, so we'll re-disable it here as desired. */ |
|
3104 if (unlikely(tx_flags & E1000_TX_FLAGS_NO_FCS)) |
|
3105 tx_desc->lower.data &= ~(cpu_to_le32(E1000_TXD_CMD_IFCS)); |
|
3106 |
|
3107 /* Force memory writes to complete before letting h/w |
|
3108 * know there are new descriptors to fetch. (Only |
|
3109 * applicable for weak-ordered memory model archs, |
|
3110 * such as IA-64). */ |
|
3111 wmb(); |
|
3112 |
|
3113 tx_ring->next_to_use = i; |
|
3114 writel(i, hw->hw_addr + tx_ring->tdt); |
|
3115 /* we need this if more than one processor can write to our tail |
|
3116 * at a time, it syncronizes IO on IA64/Altix systems */ |
|
3117 mmiowb(); |
|
3118 } |
|
3119 |
|
3120 /** |
|
3121 * 82547 workaround to avoid controller hang in half-duplex environment. |
|
3122 * The workaround is to avoid queuing a large packet that would span |
|
3123 * the internal Tx FIFO ring boundary by notifying the stack to resend |
|
3124 * the packet at a later time. This gives the Tx FIFO an opportunity to |
|
3125 * flush all packets. When that occurs, we reset the Tx FIFO pointers |
|
3126 * to the beginning of the Tx FIFO. |
|
3127 **/ |
|
3128 |
|
3129 #define E1000_FIFO_HDR 0x10 |
|
3130 #define E1000_82547_PAD_LEN 0x3E0 |
|
3131 |
|
3132 static int e1000_82547_fifo_workaround(struct e1000_adapter *adapter, |
|
3133 struct sk_buff *skb) |
|
3134 { |
|
3135 u32 fifo_space = adapter->tx_fifo_size - adapter->tx_fifo_head; |
|
3136 u32 skb_fifo_len = skb->len + E1000_FIFO_HDR; |
|
3137 |
|
3138 skb_fifo_len = ALIGN(skb_fifo_len, E1000_FIFO_HDR); |
|
3139 |
|
3140 if (adapter->link_duplex != HALF_DUPLEX) |
|
3141 goto no_fifo_stall_required; |
|
3142 |
|
3143 if (atomic_read(&adapter->tx_fifo_stall)) |
|
3144 return 1; |
|
3145 |
|
3146 if (skb_fifo_len >= (E1000_82547_PAD_LEN + fifo_space)) { |
|
3147 atomic_set(&adapter->tx_fifo_stall, 1); |
|
3148 return 1; |
|
3149 } |
|
3150 |
|
3151 no_fifo_stall_required: |
|
3152 adapter->tx_fifo_head += skb_fifo_len; |
|
3153 if (adapter->tx_fifo_head >= adapter->tx_fifo_size) |
|
3154 adapter->tx_fifo_head -= adapter->tx_fifo_size; |
|
3155 return 0; |
|
3156 } |
|
3157 |
|
3158 static int __e1000_maybe_stop_tx(struct net_device *netdev, int size) |
|
3159 { |
|
3160 struct e1000_adapter *adapter = netdev_priv(netdev); |
|
3161 struct e1000_tx_ring *tx_ring = adapter->tx_ring; |
|
3162 |
|
3163 if (adapter->ecdev) { |
|
3164 return -EBUSY; |
|
3165 } |
|
3166 |
|
3167 netif_stop_queue(netdev); |
|
3168 /* Herbert's original patch had: |
|
3169 * smp_mb__after_netif_stop_queue(); |
|
3170 * but since that doesn't exist yet, just open code it. */ |
|
3171 smp_mb(); |
|
3172 |
|
3173 /* We need to check again in a case another CPU has just |
|
3174 * made room available. */ |
|
3175 if (likely(E1000_DESC_UNUSED(tx_ring) < size)) |
|
3176 return -EBUSY; |
|
3177 |
|
3178 /* A reprieve! */ |
|
3179 netif_start_queue(netdev); |
|
3180 ++adapter->restart_queue; |
|
3181 return 0; |
|
3182 } |
|
3183 |
|
3184 static int e1000_maybe_stop_tx(struct net_device *netdev, |
|
3185 struct e1000_tx_ring *tx_ring, int size) |
|
3186 { |
|
3187 if (likely(E1000_DESC_UNUSED(tx_ring) >= size)) |
|
3188 return 0; |
|
3189 return __e1000_maybe_stop_tx(netdev, size); |
|
3190 } |
|
3191 |
|
3192 #define TXD_USE_COUNT(S, X) (((S) >> (X)) + 1 ) |
|
3193 static netdev_tx_t e1000_xmit_frame(struct sk_buff *skb, |
|
3194 struct net_device *netdev) |
|
3195 { |
|
3196 struct e1000_adapter *adapter = netdev_priv(netdev); |
|
3197 struct e1000_hw *hw = &adapter->hw; |
|
3198 struct e1000_tx_ring *tx_ring; |
|
3199 unsigned int first, max_per_txd = E1000_MAX_DATA_PER_TXD; |
|
3200 unsigned int max_txd_pwr = E1000_MAX_TXD_PWR; |
|
3201 unsigned int tx_flags = 0; |
|
3202 unsigned int len = skb_headlen(skb); |
|
3203 unsigned int nr_frags; |
|
3204 unsigned int mss; |
|
3205 int count = 0; |
|
3206 int tso; |
|
3207 unsigned int f; |
|
3208 |
|
3209 /* This goes back to the question of how to logically map a tx queue |
|
3210 * to a flow. Right now, performance is impacted slightly negatively |
|
3211 * if using multiple tx queues. If the stack breaks away from a |
|
3212 * single qdisc implementation, we can look at this again. */ |
|
3213 tx_ring = adapter->tx_ring; |
|
3214 |
|
3215 if (unlikely(skb->len <= 0)) { |
|
3216 if (!adapter->ecdev) { |
|
3217 dev_kfree_skb_any(skb); |
|
3218 } |
|
3219 return NETDEV_TX_OK; |
|
3220 } |
|
3221 |
|
3222 mss = skb_shinfo(skb)->gso_size; |
|
3223 /* The controller does a simple calculation to |
|
3224 * make sure there is enough room in the FIFO before |
|
3225 * initiating the DMA for each buffer. The calc is: |
|
3226 * 4 = ceil(buffer len/mss). To make sure we don't |
|
3227 * overrun the FIFO, adjust the max buffer len if mss |
|
3228 * drops. */ |
|
3229 if (mss) { |
|
3230 u8 hdr_len; |
|
3231 max_per_txd = min(mss << 2, max_per_txd); |
|
3232 max_txd_pwr = fls(max_per_txd) - 1; |
|
3233 |
|
3234 hdr_len = skb_transport_offset(skb) + tcp_hdrlen(skb); |
|
3235 if (skb->data_len && hdr_len == len) { |
|
3236 switch (hw->mac_type) { |
|
3237 unsigned int pull_size; |
|
3238 case e1000_82544: |
|
3239 /* Make sure we have room to chop off 4 bytes, |
|
3240 * and that the end alignment will work out to |
|
3241 * this hardware's requirements |
|
3242 * NOTE: this is a TSO only workaround |
|
3243 * if end byte alignment not correct move us |
|
3244 * into the next dword */ |
|
3245 if ((unsigned long)(skb_tail_pointer(skb) - 1) & 4) |
|
3246 break; |
|
3247 /* fall through */ |
|
3248 pull_size = min((unsigned int)4, skb->data_len); |
|
3249 if (!__pskb_pull_tail(skb, pull_size)) { |
|
3250 e_err(drv, "__pskb_pull_tail " |
|
3251 "failed.\n"); |
|
3252 if (!adapter->ecdev) { |
|
3253 dev_kfree_skb_any(skb); |
|
3254 } |
|
3255 return NETDEV_TX_OK; |
|
3256 } |
|
3257 len = skb_headlen(skb); |
|
3258 break; |
|
3259 default: |
|
3260 /* do nothing */ |
|
3261 break; |
|
3262 } |
|
3263 } |
|
3264 } |
|
3265 |
|
3266 /* reserve a descriptor for the offload context */ |
|
3267 if ((mss) || (skb->ip_summed == CHECKSUM_PARTIAL)) |
|
3268 count++; |
|
3269 count++; |
|
3270 |
|
3271 /* Controller Erratum workaround */ |
|
3272 if (!skb->data_len && tx_ring->last_tx_tso && !skb_is_gso(skb)) |
|
3273 count++; |
|
3274 |
|
3275 count += TXD_USE_COUNT(len, max_txd_pwr); |
|
3276 |
|
3277 if (adapter->pcix_82544) |
|
3278 count++; |
|
3279 |
|
3280 /* work-around for errata 10 and it applies to all controllers |
|
3281 * in PCI-X mode, so add one more descriptor to the count |
|
3282 */ |
|
3283 if (unlikely((hw->bus_type == e1000_bus_type_pcix) && |
|
3284 (len > 2015))) |
|
3285 count++; |
|
3286 |
|
3287 nr_frags = skb_shinfo(skb)->nr_frags; |
|
3288 for (f = 0; f < nr_frags; f++) |
|
3289 count += TXD_USE_COUNT(skb_frag_size(&skb_shinfo(skb)->frags[f]), |
|
3290 max_txd_pwr); |
|
3291 if (adapter->pcix_82544) |
|
3292 count += nr_frags; |
|
3293 |
|
3294 /* need: count + 2 desc gap to keep tail from touching |
|
3295 * head, otherwise try next time */ |
|
3296 if (unlikely(e1000_maybe_stop_tx(netdev, tx_ring, count + 2))) |
|
3297 return NETDEV_TX_BUSY; |
|
3298 |
|
3299 if (unlikely((hw->mac_type == e1000_82547) && |
|
3300 (e1000_82547_fifo_workaround(adapter, skb)))) { |
|
3301 if (!adapter->ecdev) { |
|
3302 netif_stop_queue(netdev); |
|
3303 if (!test_bit(__E1000_DOWN, &adapter->flags)) |
|
3304 schedule_delayed_work(&adapter->fifo_stall_task, 1); |
|
3305 } |
|
3306 return NETDEV_TX_BUSY; |
|
3307 } |
|
3308 |
|
3309 if (vlan_tx_tag_present(skb)) { |
|
3310 tx_flags |= E1000_TX_FLAGS_VLAN; |
|
3311 tx_flags |= (vlan_tx_tag_get(skb) << E1000_TX_FLAGS_VLAN_SHIFT); |
|
3312 } |
|
3313 |
|
3314 first = tx_ring->next_to_use; |
|
3315 |
|
3316 tso = e1000_tso(adapter, tx_ring, skb); |
|
3317 if (tso < 0) { |
|
3318 if (!adapter->ecdev) { |
|
3319 dev_kfree_skb_any(skb); |
|
3320 } |
|
3321 return NETDEV_TX_OK; |
|
3322 } |
|
3323 |
|
3324 if (likely(tso)) { |
|
3325 if (likely(hw->mac_type != e1000_82544)) |
|
3326 tx_ring->last_tx_tso = true; |
|
3327 tx_flags |= E1000_TX_FLAGS_TSO; |
|
3328 } else if (likely(e1000_tx_csum(adapter, tx_ring, skb))) |
|
3329 tx_flags |= E1000_TX_FLAGS_CSUM; |
|
3330 |
|
3331 if (likely(skb->protocol == htons(ETH_P_IP))) |
|
3332 tx_flags |= E1000_TX_FLAGS_IPV4; |
|
3333 |
|
3334 if (unlikely(skb->no_fcs)) |
|
3335 tx_flags |= E1000_TX_FLAGS_NO_FCS; |
|
3336 |
|
3337 count = e1000_tx_map(adapter, tx_ring, skb, first, max_per_txd, |
|
3338 nr_frags, mss); |
|
3339 |
|
3340 if (count) { |
|
3341 e1000_tx_queue(adapter, tx_ring, tx_flags, count); |
|
3342 if (!adapter->ecdev) { |
|
3343 /* Make sure there is space in the ring for the next send. */ |
|
3344 e1000_maybe_stop_tx(netdev, tx_ring, MAX_SKB_FRAGS + 2); |
|
3345 } |
|
3346 |
|
3347 } else { |
|
3348 if (!adapter->ecdev) { |
|
3349 dev_kfree_skb_any(skb); |
|
3350 } |
|
3351 tx_ring->buffer_info[first].time_stamp = 0; |
|
3352 tx_ring->next_to_use = first; |
|
3353 } |
|
3354 |
|
3355 return NETDEV_TX_OK; |
|
3356 } |
|
3357 |
|
3358 #define NUM_REGS 38 /* 1 based count */ |
|
3359 static void e1000_regdump(struct e1000_adapter *adapter) |
|
3360 { |
|
3361 struct e1000_hw *hw = &adapter->hw; |
|
3362 u32 regs[NUM_REGS]; |
|
3363 u32 *regs_buff = regs; |
|
3364 int i = 0; |
|
3365 |
|
3366 static const char * const reg_name[] = { |
|
3367 "CTRL", "STATUS", |
|
3368 "RCTL", "RDLEN", "RDH", "RDT", "RDTR", |
|
3369 "TCTL", "TDBAL", "TDBAH", "TDLEN", "TDH", "TDT", |
|
3370 "TIDV", "TXDCTL", "TADV", "TARC0", |
|
3371 "TDBAL1", "TDBAH1", "TDLEN1", "TDH1", "TDT1", |
|
3372 "TXDCTL1", "TARC1", |
|
3373 "CTRL_EXT", "ERT", "RDBAL", "RDBAH", |
|
3374 "TDFH", "TDFT", "TDFHS", "TDFTS", "TDFPC", |
|
3375 "RDFH", "RDFT", "RDFHS", "RDFTS", "RDFPC" |
|
3376 }; |
|
3377 |
|
3378 regs_buff[0] = er32(CTRL); |
|
3379 regs_buff[1] = er32(STATUS); |
|
3380 |
|
3381 regs_buff[2] = er32(RCTL); |
|
3382 regs_buff[3] = er32(RDLEN); |
|
3383 regs_buff[4] = er32(RDH); |
|
3384 regs_buff[5] = er32(RDT); |
|
3385 regs_buff[6] = er32(RDTR); |
|
3386 |
|
3387 regs_buff[7] = er32(TCTL); |
|
3388 regs_buff[8] = er32(TDBAL); |
|
3389 regs_buff[9] = er32(TDBAH); |
|
3390 regs_buff[10] = er32(TDLEN); |
|
3391 regs_buff[11] = er32(TDH); |
|
3392 regs_buff[12] = er32(TDT); |
|
3393 regs_buff[13] = er32(TIDV); |
|
3394 regs_buff[14] = er32(TXDCTL); |
|
3395 regs_buff[15] = er32(TADV); |
|
3396 regs_buff[16] = er32(TARC0); |
|
3397 |
|
3398 regs_buff[17] = er32(TDBAL1); |
|
3399 regs_buff[18] = er32(TDBAH1); |
|
3400 regs_buff[19] = er32(TDLEN1); |
|
3401 regs_buff[20] = er32(TDH1); |
|
3402 regs_buff[21] = er32(TDT1); |
|
3403 regs_buff[22] = er32(TXDCTL1); |
|
3404 regs_buff[23] = er32(TARC1); |
|
3405 regs_buff[24] = er32(CTRL_EXT); |
|
3406 regs_buff[25] = er32(ERT); |
|
3407 regs_buff[26] = er32(RDBAL0); |
|
3408 regs_buff[27] = er32(RDBAH0); |
|
3409 regs_buff[28] = er32(TDFH); |
|
3410 regs_buff[29] = er32(TDFT); |
|
3411 regs_buff[30] = er32(TDFHS); |
|
3412 regs_buff[31] = er32(TDFTS); |
|
3413 regs_buff[32] = er32(TDFPC); |
|
3414 regs_buff[33] = er32(RDFH); |
|
3415 regs_buff[34] = er32(RDFT); |
|
3416 regs_buff[35] = er32(RDFHS); |
|
3417 regs_buff[36] = er32(RDFTS); |
|
3418 regs_buff[37] = er32(RDFPC); |
|
3419 |
|
3420 pr_info("Register dump\n"); |
|
3421 for (i = 0; i < NUM_REGS; i++) |
|
3422 pr_info("%-15s %08x\n", reg_name[i], regs_buff[i]); |
|
3423 } |
|
3424 |
|
3425 /* |
|
3426 * e1000_dump: Print registers, tx ring and rx ring |
|
3427 */ |
|
3428 static void e1000_dump(struct e1000_adapter *adapter) |
|
3429 { |
|
3430 /* this code doesn't handle multiple rings */ |
|
3431 struct e1000_tx_ring *tx_ring = adapter->tx_ring; |
|
3432 struct e1000_rx_ring *rx_ring = adapter->rx_ring; |
|
3433 int i; |
|
3434 |
|
3435 if (!netif_msg_hw(adapter)) |
|
3436 return; |
|
3437 |
|
3438 /* Print Registers */ |
|
3439 e1000_regdump(adapter); |
|
3440 |
|
3441 /* |
|
3442 * transmit dump |
|
3443 */ |
|
3444 pr_info("TX Desc ring0 dump\n"); |
|
3445 |
|
3446 /* Transmit Descriptor Formats - DEXT[29] is 0 (Legacy) or 1 (Extended) |
|
3447 * |
|
3448 * Legacy Transmit Descriptor |
|
3449 * +--------------------------------------------------------------+ |
|
3450 * 0 | Buffer Address [63:0] (Reserved on Write Back) | |
|
3451 * +--------------------------------------------------------------+ |
|
3452 * 8 | Special | CSS | Status | CMD | CSO | Length | |
|
3453 * +--------------------------------------------------------------+ |
|
3454 * 63 48 47 36 35 32 31 24 23 16 15 0 |
|
3455 * |
|
3456 * Extended Context Descriptor (DTYP=0x0) for TSO or checksum offload |
|
3457 * 63 48 47 40 39 32 31 16 15 8 7 0 |
|
3458 * +----------------------------------------------------------------+ |
|
3459 * 0 | TUCSE | TUCS0 | TUCSS | IPCSE | IPCS0 | IPCSS | |
|
3460 * +----------------------------------------------------------------+ |
|
3461 * 8 | MSS | HDRLEN | RSV | STA | TUCMD | DTYP | PAYLEN | |
|
3462 * +----------------------------------------------------------------+ |
|
3463 * 63 48 47 40 39 36 35 32 31 24 23 20 19 0 |
|
3464 * |
|
3465 * Extended Data Descriptor (DTYP=0x1) |
|
3466 * +----------------------------------------------------------------+ |
|
3467 * 0 | Buffer Address [63:0] | |
|
3468 * +----------------------------------------------------------------+ |
|
3469 * 8 | VLAN tag | POPTS | Rsvd | Status | Command | DTYP | DTALEN | |
|
3470 * +----------------------------------------------------------------+ |
|
3471 * 63 48 47 40 39 36 35 32 31 24 23 20 19 0 |
|
3472 */ |
|
3473 pr_info("Tc[desc] [Ce CoCsIpceCoS] [MssHlRSCm0Plen] [bi->dma ] leng ntw timestmp bi->skb\n"); |
|
3474 pr_info("Td[desc] [address 63:0 ] [VlaPoRSCm1Dlen] [bi->dma ] leng ntw timestmp bi->skb\n"); |
|
3475 |
|
3476 if (!netif_msg_tx_done(adapter)) |
|
3477 goto rx_ring_summary; |
|
3478 |
|
3479 for (i = 0; tx_ring->desc && (i < tx_ring->count); i++) { |
|
3480 struct e1000_tx_desc *tx_desc = E1000_TX_DESC(*tx_ring, i); |
|
3481 struct e1000_buffer *buffer_info = &tx_ring->buffer_info[i]; |
|
3482 struct my_u { __le64 a; __le64 b; }; |
|
3483 struct my_u *u = (struct my_u *)tx_desc; |
|
3484 const char *type; |
|
3485 |
|
3486 if (i == tx_ring->next_to_use && i == tx_ring->next_to_clean) |
|
3487 type = "NTC/U"; |
|
3488 else if (i == tx_ring->next_to_use) |
|
3489 type = "NTU"; |
|
3490 else if (i == tx_ring->next_to_clean) |
|
3491 type = "NTC"; |
|
3492 else |
|
3493 type = ""; |
|
3494 |
|
3495 pr_info("T%c[0x%03X] %016llX %016llX %016llX %04X %3X %016llX %p %s\n", |
|
3496 ((le64_to_cpu(u->b) & (1<<20)) ? 'd' : 'c'), i, |
|
3497 le64_to_cpu(u->a), le64_to_cpu(u->b), |
|
3498 (u64)buffer_info->dma, buffer_info->length, |
|
3499 buffer_info->next_to_watch, |
|
3500 (u64)buffer_info->time_stamp, buffer_info->skb, type); |
|
3501 } |
|
3502 |
|
3503 rx_ring_summary: |
|
3504 /* |
|
3505 * receive dump |
|
3506 */ |
|
3507 pr_info("\nRX Desc ring dump\n"); |
|
3508 |
|
3509 /* Legacy Receive Descriptor Format |
|
3510 * |
|
3511 * +-----------------------------------------------------+ |
|
3512 * | Buffer Address [63:0] | |
|
3513 * +-----------------------------------------------------+ |
|
3514 * | VLAN Tag | Errors | Status 0 | Packet csum | Length | |
|
3515 * +-----------------------------------------------------+ |
|
3516 * 63 48 47 40 39 32 31 16 15 0 |
|
3517 */ |
|
3518 pr_info("R[desc] [address 63:0 ] [vl er S cks ln] [bi->dma ] [bi->skb]\n"); |
|
3519 |
|
3520 if (!netif_msg_rx_status(adapter)) |
|
3521 goto exit; |
|
3522 |
|
3523 for (i = 0; rx_ring->desc && (i < rx_ring->count); i++) { |
|
3524 struct e1000_rx_desc *rx_desc = E1000_RX_DESC(*rx_ring, i); |
|
3525 struct e1000_buffer *buffer_info = &rx_ring->buffer_info[i]; |
|
3526 struct my_u { __le64 a; __le64 b; }; |
|
3527 struct my_u *u = (struct my_u *)rx_desc; |
|
3528 const char *type; |
|
3529 |
|
3530 if (i == rx_ring->next_to_use) |
|
3531 type = "NTU"; |
|
3532 else if (i == rx_ring->next_to_clean) |
|
3533 type = "NTC"; |
|
3534 else |
|
3535 type = ""; |
|
3536 |
|
3537 pr_info("R[0x%03X] %016llX %016llX %016llX %p %s\n", |
|
3538 i, le64_to_cpu(u->a), le64_to_cpu(u->b), |
|
3539 (u64)buffer_info->dma, buffer_info->skb, type); |
|
3540 } /* for */ |
|
3541 |
|
3542 /* dump the descriptor caches */ |
|
3543 /* rx */ |
|
3544 pr_info("Rx descriptor cache in 64bit format\n"); |
|
3545 for (i = 0x6000; i <= 0x63FF ; i += 0x10) { |
|
3546 pr_info("R%04X: %08X|%08X %08X|%08X\n", |
|
3547 i, |
|
3548 readl(adapter->hw.hw_addr + i+4), |
|
3549 readl(adapter->hw.hw_addr + i), |
|
3550 readl(adapter->hw.hw_addr + i+12), |
|
3551 readl(adapter->hw.hw_addr + i+8)); |
|
3552 } |
|
3553 /* tx */ |
|
3554 pr_info("Tx descriptor cache in 64bit format\n"); |
|
3555 for (i = 0x7000; i <= 0x73FF ; i += 0x10) { |
|
3556 pr_info("T%04X: %08X|%08X %08X|%08X\n", |
|
3557 i, |
|
3558 readl(adapter->hw.hw_addr + i+4), |
|
3559 readl(adapter->hw.hw_addr + i), |
|
3560 readl(adapter->hw.hw_addr + i+12), |
|
3561 readl(adapter->hw.hw_addr + i+8)); |
|
3562 } |
|
3563 exit: |
|
3564 return; |
|
3565 } |
|
3566 |
|
3567 /** |
|
3568 * e1000_tx_timeout - Respond to a Tx Hang |
|
3569 * @netdev: network interface device structure |
|
3570 **/ |
|
3571 |
|
3572 static void e1000_tx_timeout(struct net_device *netdev) |
|
3573 { |
|
3574 struct e1000_adapter *adapter = netdev_priv(netdev); |
|
3575 |
|
3576 /* Do the reset outside of interrupt context */ |
|
3577 adapter->tx_timeout_count++; |
|
3578 schedule_work(&adapter->reset_task); |
|
3579 } |
|
3580 |
|
3581 static void e1000_reset_task(struct work_struct *work) |
|
3582 { |
|
3583 struct e1000_adapter *adapter = |
|
3584 container_of(work, struct e1000_adapter, reset_task); |
|
3585 |
|
3586 if (test_bit(__E1000_DOWN, &adapter->flags)) |
|
3587 return; |
|
3588 e_err(drv, "Reset adapter\n"); |
|
3589 e1000_reinit_safe(adapter); |
|
3590 } |
|
3591 |
|
3592 /** |
|
3593 * e1000_get_stats - Get System Network Statistics |
|
3594 * @netdev: network interface device structure |
|
3595 * |
|
3596 * Returns the address of the device statistics structure. |
|
3597 * The statistics are actually updated from the watchdog. |
|
3598 **/ |
|
3599 |
|
3600 static struct net_device_stats *e1000_get_stats(struct net_device *netdev) |
|
3601 { |
|
3602 /* only return the current stats */ |
|
3603 return &netdev->stats; |
|
3604 } |
|
3605 |
|
3606 /** |
|
3607 * e1000_change_mtu - Change the Maximum Transfer Unit |
|
3608 * @netdev: network interface device structure |
|
3609 * @new_mtu: new value for maximum frame size |
|
3610 * |
|
3611 * Returns 0 on success, negative on failure |
|
3612 **/ |
|
3613 |
|
3614 static int e1000_change_mtu(struct net_device *netdev, int new_mtu) |
|
3615 { |
|
3616 struct e1000_adapter *adapter = netdev_priv(netdev); |
|
3617 struct e1000_hw *hw = &adapter->hw; |
|
3618 int max_frame = new_mtu + ENET_HEADER_SIZE + ETHERNET_FCS_SIZE; |
|
3619 |
|
3620 if (adapter->ecdev) { |
|
3621 return -EBUSY; |
|
3622 } |
|
3623 |
|
3624 if ((max_frame < MINIMUM_ETHERNET_FRAME_SIZE) || |
|
3625 (max_frame > MAX_JUMBO_FRAME_SIZE)) { |
|
3626 e_err(probe, "Invalid MTU setting\n"); |
|
3627 return -EINVAL; |
|
3628 } |
|
3629 |
|
3630 /* Adapter-specific max frame size limits. */ |
|
3631 switch (hw->mac_type) { |
|
3632 case e1000_undefined ... e1000_82542_rev2_1: |
|
3633 if (max_frame > (ETH_FRAME_LEN + ETH_FCS_LEN)) { |
|
3634 e_err(probe, "Jumbo Frames not supported.\n"); |
|
3635 return -EINVAL; |
|
3636 } |
|
3637 break; |
|
3638 default: |
|
3639 /* Capable of supporting up to MAX_JUMBO_FRAME_SIZE limit. */ |
|
3640 break; |
|
3641 } |
|
3642 |
|
3643 while (test_and_set_bit(__E1000_RESETTING, &adapter->flags)) |
|
3644 msleep(1); |
|
3645 /* e1000_down has a dependency on max_frame_size */ |
|
3646 hw->max_frame_size = max_frame; |
|
3647 if (netif_running(netdev)) |
|
3648 e1000_down(adapter); |
|
3649 |
|
3650 /* NOTE: netdev_alloc_skb reserves 16 bytes, and typically NET_IP_ALIGN |
|
3651 * means we reserve 2 more, this pushes us to allocate from the next |
|
3652 * larger slab size. |
|
3653 * i.e. RXBUFFER_2048 --> size-4096 slab |
|
3654 * however with the new *_jumbo_rx* routines, jumbo receives will use |
|
3655 * fragmented skbs */ |
|
3656 |
|
3657 if (max_frame <= E1000_RXBUFFER_2048) |
|
3658 adapter->rx_buffer_len = E1000_RXBUFFER_2048; |
|
3659 else |
|
3660 #if (PAGE_SIZE >= E1000_RXBUFFER_16384) |
|
3661 adapter->rx_buffer_len = E1000_RXBUFFER_16384; |
|
3662 #elif (PAGE_SIZE >= E1000_RXBUFFER_4096) |
|
3663 adapter->rx_buffer_len = PAGE_SIZE; |
|
3664 #endif |
|
3665 |
|
3666 /* adjust allocation if LPE protects us, and we aren't using SBP */ |
|
3667 if (!hw->tbi_compatibility_on && |
|
3668 ((max_frame == (ETH_FRAME_LEN + ETH_FCS_LEN)) || |
|
3669 (max_frame == MAXIMUM_ETHERNET_VLAN_SIZE))) |
|
3670 adapter->rx_buffer_len = MAXIMUM_ETHERNET_VLAN_SIZE; |
|
3671 |
|
3672 pr_info("%s changing MTU from %d to %d\n", |
|
3673 netdev->name, netdev->mtu, new_mtu); |
|
3674 netdev->mtu = new_mtu; |
|
3675 |
|
3676 if (netif_running(netdev)) |
|
3677 e1000_up(adapter); |
|
3678 else |
|
3679 e1000_reset(adapter); |
|
3680 |
|
3681 clear_bit(__E1000_RESETTING, &adapter->flags); |
|
3682 |
|
3683 return 0; |
|
3684 } |
|
3685 |
|
3686 /** |
|
3687 * e1000_update_stats - Update the board statistics counters |
|
3688 * @adapter: board private structure |
|
3689 **/ |
|
3690 |
|
3691 void e1000_update_stats(struct e1000_adapter *adapter) |
|
3692 { |
|
3693 struct net_device *netdev = adapter->netdev; |
|
3694 struct e1000_hw *hw = &adapter->hw; |
|
3695 struct pci_dev *pdev = adapter->pdev; |
|
3696 unsigned long flags = 0; |
|
3697 u16 phy_tmp; |
|
3698 |
|
3699 #define PHY_IDLE_ERROR_COUNT_MASK 0x00FF |
|
3700 |
|
3701 /* |
|
3702 * Prevent stats update while adapter is being reset, or if the pci |
|
3703 * connection is down. |
|
3704 */ |
|
3705 if (adapter->link_speed == 0) |
|
3706 return; |
|
3707 if (pci_channel_offline(pdev)) |
|
3708 return; |
|
3709 |
|
3710 if (!adapter->ecdev) { |
|
3711 spin_lock_irqsave(&adapter->stats_lock, flags); |
|
3712 } |
|
3713 |
|
3714 /* these counters are modified from e1000_tbi_adjust_stats, |
|
3715 * called from the interrupt context, so they must only |
|
3716 * be written while holding adapter->stats_lock |
|
3717 */ |
|
3718 |
|
3719 adapter->stats.crcerrs += er32(CRCERRS); |
|
3720 adapter->stats.gprc += er32(GPRC); |
|
3721 adapter->stats.gorcl += er32(GORCL); |
|
3722 adapter->stats.gorch += er32(GORCH); |
|
3723 adapter->stats.bprc += er32(BPRC); |
|
3724 adapter->stats.mprc += er32(MPRC); |
|
3725 adapter->stats.roc += er32(ROC); |
|
3726 |
|
3727 adapter->stats.prc64 += er32(PRC64); |
|
3728 adapter->stats.prc127 += er32(PRC127); |
|
3729 adapter->stats.prc255 += er32(PRC255); |
|
3730 adapter->stats.prc511 += er32(PRC511); |
|
3731 adapter->stats.prc1023 += er32(PRC1023); |
|
3732 adapter->stats.prc1522 += er32(PRC1522); |
|
3733 |
|
3734 adapter->stats.symerrs += er32(SYMERRS); |
|
3735 adapter->stats.mpc += er32(MPC); |
|
3736 adapter->stats.scc += er32(SCC); |
|
3737 adapter->stats.ecol += er32(ECOL); |
|
3738 adapter->stats.mcc += er32(MCC); |
|
3739 adapter->stats.latecol += er32(LATECOL); |
|
3740 adapter->stats.dc += er32(DC); |
|
3741 adapter->stats.sec += er32(SEC); |
|
3742 adapter->stats.rlec += er32(RLEC); |
|
3743 adapter->stats.xonrxc += er32(XONRXC); |
|
3744 adapter->stats.xontxc += er32(XONTXC); |
|
3745 adapter->stats.xoffrxc += er32(XOFFRXC); |
|
3746 adapter->stats.xofftxc += er32(XOFFTXC); |
|
3747 adapter->stats.fcruc += er32(FCRUC); |
|
3748 adapter->stats.gptc += er32(GPTC); |
|
3749 adapter->stats.gotcl += er32(GOTCL); |
|
3750 adapter->stats.gotch += er32(GOTCH); |
|
3751 adapter->stats.rnbc += er32(RNBC); |
|
3752 adapter->stats.ruc += er32(RUC); |
|
3753 adapter->stats.rfc += er32(RFC); |
|
3754 adapter->stats.rjc += er32(RJC); |
|
3755 adapter->stats.torl += er32(TORL); |
|
3756 adapter->stats.torh += er32(TORH); |
|
3757 adapter->stats.totl += er32(TOTL); |
|
3758 adapter->stats.toth += er32(TOTH); |
|
3759 adapter->stats.tpr += er32(TPR); |
|
3760 |
|
3761 adapter->stats.ptc64 += er32(PTC64); |
|
3762 adapter->stats.ptc127 += er32(PTC127); |
|
3763 adapter->stats.ptc255 += er32(PTC255); |
|
3764 adapter->stats.ptc511 += er32(PTC511); |
|
3765 adapter->stats.ptc1023 += er32(PTC1023); |
|
3766 adapter->stats.ptc1522 += er32(PTC1522); |
|
3767 |
|
3768 adapter->stats.mptc += er32(MPTC); |
|
3769 adapter->stats.bptc += er32(BPTC); |
|
3770 |
|
3771 /* used for adaptive IFS */ |
|
3772 |
|
3773 hw->tx_packet_delta = er32(TPT); |
|
3774 adapter->stats.tpt += hw->tx_packet_delta; |
|
3775 hw->collision_delta = er32(COLC); |
|
3776 adapter->stats.colc += hw->collision_delta; |
|
3777 |
|
3778 if (hw->mac_type >= e1000_82543) { |
|
3779 adapter->stats.algnerrc += er32(ALGNERRC); |
|
3780 adapter->stats.rxerrc += er32(RXERRC); |
|
3781 adapter->stats.tncrs += er32(TNCRS); |
|
3782 adapter->stats.cexterr += er32(CEXTERR); |
|
3783 adapter->stats.tsctc += er32(TSCTC); |
|
3784 adapter->stats.tsctfc += er32(TSCTFC); |
|
3785 } |
|
3786 |
|
3787 /* Fill out the OS statistics structure */ |
|
3788 netdev->stats.multicast = adapter->stats.mprc; |
|
3789 netdev->stats.collisions = adapter->stats.colc; |
|
3790 |
|
3791 /* Rx Errors */ |
|
3792 |
|
3793 /* RLEC on some newer hardware can be incorrect so build |
|
3794 * our own version based on RUC and ROC */ |
|
3795 netdev->stats.rx_errors = adapter->stats.rxerrc + |
|
3796 adapter->stats.crcerrs + adapter->stats.algnerrc + |
|
3797 adapter->stats.ruc + adapter->stats.roc + |
|
3798 adapter->stats.cexterr; |
|
3799 adapter->stats.rlerrc = adapter->stats.ruc + adapter->stats.roc; |
|
3800 netdev->stats.rx_length_errors = adapter->stats.rlerrc; |
|
3801 netdev->stats.rx_crc_errors = adapter->stats.crcerrs; |
|
3802 netdev->stats.rx_frame_errors = adapter->stats.algnerrc; |
|
3803 netdev->stats.rx_missed_errors = adapter->stats.mpc; |
|
3804 |
|
3805 /* Tx Errors */ |
|
3806 adapter->stats.txerrc = adapter->stats.ecol + adapter->stats.latecol; |
|
3807 netdev->stats.tx_errors = adapter->stats.txerrc; |
|
3808 netdev->stats.tx_aborted_errors = adapter->stats.ecol; |
|
3809 netdev->stats.tx_window_errors = adapter->stats.latecol; |
|
3810 netdev->stats.tx_carrier_errors = adapter->stats.tncrs; |
|
3811 if (hw->bad_tx_carr_stats_fd && |
|
3812 adapter->link_duplex == FULL_DUPLEX) { |
|
3813 netdev->stats.tx_carrier_errors = 0; |
|
3814 adapter->stats.tncrs = 0; |
|
3815 } |
|
3816 |
|
3817 /* Tx Dropped needs to be maintained elsewhere */ |
|
3818 |
|
3819 /* Phy Stats */ |
|
3820 if (hw->media_type == e1000_media_type_copper) { |
|
3821 if ((adapter->link_speed == SPEED_1000) && |
|
3822 (!e1000_read_phy_reg(hw, PHY_1000T_STATUS, &phy_tmp))) { |
|
3823 phy_tmp &= PHY_IDLE_ERROR_COUNT_MASK; |
|
3824 adapter->phy_stats.idle_errors += phy_tmp; |
|
3825 } |
|
3826 |
|
3827 if ((hw->mac_type <= e1000_82546) && |
|
3828 (hw->phy_type == e1000_phy_m88) && |
|
3829 !e1000_read_phy_reg(hw, M88E1000_RX_ERR_CNTR, &phy_tmp)) |
|
3830 adapter->phy_stats.receive_errors += phy_tmp; |
|
3831 } |
|
3832 |
|
3833 /* Management Stats */ |
|
3834 if (hw->has_smbus) { |
|
3835 adapter->stats.mgptc += er32(MGTPTC); |
|
3836 adapter->stats.mgprc += er32(MGTPRC); |
|
3837 adapter->stats.mgpdc += er32(MGTPDC); |
|
3838 } |
|
3839 |
|
3840 if (!adapter->ecdev) { |
|
3841 spin_unlock_irqrestore(&adapter->stats_lock, flags); |
|
3842 } |
|
3843 } |
|
3844 |
|
3845 void ec_poll(struct net_device *netdev) |
|
3846 { |
|
3847 struct e1000_adapter *adapter = netdev_priv(netdev); |
|
3848 if (jiffies - adapter->ec_watchdog_jiffies >= 2 * HZ) { |
|
3849 e1000_watchdog(&adapter->watchdog_task.work); |
|
3850 adapter->ec_watchdog_jiffies = jiffies; |
|
3851 } |
|
3852 |
|
3853 e1000_intr(0, netdev); |
|
3854 } |
|
3855 |
|
3856 /** |
|
3857 * e1000_intr - Interrupt Handler |
|
3858 * @irq: interrupt number |
|
3859 * @data: pointer to a network interface device structure |
|
3860 **/ |
|
3861 |
|
3862 static irqreturn_t e1000_intr(int irq, void *data) |
|
3863 { |
|
3864 struct net_device *netdev = data; |
|
3865 struct e1000_adapter *adapter = netdev_priv(netdev); |
|
3866 struct e1000_hw *hw = &adapter->hw; |
|
3867 u32 icr = er32(ICR); |
|
3868 |
|
3869 if (unlikely((!icr))) |
|
3870 return IRQ_NONE; /* Not our interrupt */ |
|
3871 |
|
3872 /* |
|
3873 * we might have caused the interrupt, but the above |
|
3874 * read cleared it, and just in case the driver is |
|
3875 * down there is nothing to do so return handled |
|
3876 */ |
|
3877 if (unlikely(test_bit(__E1000_DOWN, &adapter->flags))) |
|
3878 return IRQ_HANDLED; |
|
3879 |
|
3880 if (unlikely(icr & (E1000_ICR_RXSEQ | E1000_ICR_LSC))) { |
|
3881 hw->get_link_status = 1; |
|
3882 /* guard against interrupt when we're going down */ |
|
3883 if (!adapter->ecdev && !test_bit(__E1000_DOWN, &adapter->flags)) |
|
3884 schedule_delayed_work(&adapter->watchdog_task, 1); |
|
3885 } |
|
3886 |
|
3887 if (adapter->ecdev) { |
|
3888 int i, ec_work_done = 0; |
|
3889 for (i = 0; i < E1000_MAX_INTR; i++) { |
|
3890 if (unlikely(!adapter->clean_rx(adapter, adapter->rx_ring, |
|
3891 &ec_work_done, 100) && |
|
3892 !e1000_clean_tx_irq(adapter, adapter->tx_ring))) { |
|
3893 break; |
|
3894 } |
|
3895 } |
|
3896 } else { |
|
3897 /* disable interrupts, without the synchronize_irq bit */ |
|
3898 ew32(IMC, ~0); |
|
3899 E1000_WRITE_FLUSH(); |
|
3900 |
|
3901 if (likely(napi_schedule_prep(&adapter->napi))) { |
|
3902 adapter->total_tx_bytes = 0; |
|
3903 adapter->total_tx_packets = 0; |
|
3904 adapter->total_rx_bytes = 0; |
|
3905 adapter->total_rx_packets = 0; |
|
3906 __napi_schedule(&adapter->napi); |
|
3907 } else { |
|
3908 /* this really should not happen! if it does it is basically a |
|
3909 * bug, but not a hard error, so enable ints and continue */ |
|
3910 if (!test_bit(__E1000_DOWN, &adapter->flags)) |
|
3911 e1000_irq_enable(adapter); |
|
3912 } |
|
3913 } |
|
3914 |
|
3915 return IRQ_HANDLED; |
|
3916 } |
|
3917 |
|
3918 /** |
|
3919 * e1000_clean - NAPI Rx polling callback |
|
3920 * @adapter: board private structure |
|
3921 * EtherCAT: never called |
|
3922 **/ |
|
3923 static int e1000_clean(struct napi_struct *napi, int budget) |
|
3924 { |
|
3925 struct e1000_adapter *adapter = container_of(napi, struct e1000_adapter, napi); |
|
3926 int tx_clean_complete = 0, work_done = 0; |
|
3927 |
|
3928 tx_clean_complete = e1000_clean_tx_irq(adapter, &adapter->tx_ring[0]); |
|
3929 |
|
3930 adapter->clean_rx(adapter, &adapter->rx_ring[0], &work_done, budget); |
|
3931 |
|
3932 if (!tx_clean_complete) |
|
3933 work_done = budget; |
|
3934 |
|
3935 /* If budget not fully consumed, exit the polling mode */ |
|
3936 if (work_done < budget) { |
|
3937 if (likely(adapter->itr_setting & 3)) |
|
3938 e1000_set_itr(adapter); |
|
3939 napi_complete(napi); |
|
3940 if (!test_bit(__E1000_DOWN, &adapter->flags)) |
|
3941 e1000_irq_enable(adapter); |
|
3942 } |
|
3943 |
|
3944 return work_done; |
|
3945 } |
|
3946 |
|
3947 /** |
|
3948 * e1000_clean_tx_irq - Reclaim resources after transmit completes |
|
3949 * @adapter: board private structure |
|
3950 **/ |
|
3951 static bool e1000_clean_tx_irq(struct e1000_adapter *adapter, |
|
3952 struct e1000_tx_ring *tx_ring) |
|
3953 { |
|
3954 struct e1000_hw *hw = &adapter->hw; |
|
3955 struct net_device *netdev = adapter->netdev; |
|
3956 struct e1000_tx_desc *tx_desc, *eop_desc; |
|
3957 struct e1000_buffer *buffer_info; |
|
3958 unsigned int i, eop; |
|
3959 unsigned int count = 0; |
|
3960 unsigned int total_tx_bytes=0, total_tx_packets=0; |
|
3961 |
|
3962 i = tx_ring->next_to_clean; |
|
3963 eop = tx_ring->buffer_info[i].next_to_watch; |
|
3964 eop_desc = E1000_TX_DESC(*tx_ring, eop); |
|
3965 |
|
3966 while ((eop_desc->upper.data & cpu_to_le32(E1000_TXD_STAT_DD)) && |
|
3967 (count < tx_ring->count)) { |
|
3968 bool cleaned = false; |
|
3969 rmb(); /* read buffer_info after eop_desc */ |
|
3970 for ( ; !cleaned; count++) { |
|
3971 tx_desc = E1000_TX_DESC(*tx_ring, i); |
|
3972 buffer_info = &tx_ring->buffer_info[i]; |
|
3973 cleaned = (i == eop); |
|
3974 |
|
3975 if (cleaned) { |
|
3976 total_tx_packets += buffer_info->segs; |
|
3977 total_tx_bytes += buffer_info->bytecount; |
|
3978 } |
|
3979 e1000_unmap_and_free_tx_resource(adapter, buffer_info); |
|
3980 tx_desc->upper.data = 0; |
|
3981 |
|
3982 if (unlikely(++i == tx_ring->count)) i = 0; |
|
3983 } |
|
3984 |
|
3985 eop = tx_ring->buffer_info[i].next_to_watch; |
|
3986 eop_desc = E1000_TX_DESC(*tx_ring, eop); |
|
3987 } |
|
3988 |
|
3989 tx_ring->next_to_clean = i; |
|
3990 |
|
3991 #define TX_WAKE_THRESHOLD 32 |
|
3992 if (!adapter->ecdev && unlikely(count && netif_carrier_ok(netdev) && |
|
3993 E1000_DESC_UNUSED(tx_ring) >= TX_WAKE_THRESHOLD)) { |
|
3994 /* Make sure that anybody stopping the queue after this |
|
3995 * sees the new next_to_clean. |
|
3996 */ |
|
3997 smp_mb(); |
|
3998 |
|
3999 if (netif_queue_stopped(netdev) && |
|
4000 !(test_bit(__E1000_DOWN, &adapter->flags))) { |
|
4001 netif_wake_queue(netdev); |
|
4002 ++adapter->restart_queue; |
|
4003 } |
|
4004 } |
|
4005 |
|
4006 if (!adapter->ecdev && adapter->detect_tx_hung) { |
|
4007 /* Detect a transmit hang in hardware, this serializes the |
|
4008 * check with the clearing of time_stamp and movement of i */ |
|
4009 adapter->detect_tx_hung = false; |
|
4010 if (tx_ring->buffer_info[eop].time_stamp && |
|
4011 time_after(jiffies, tx_ring->buffer_info[eop].time_stamp + |
|
4012 (adapter->tx_timeout_factor * HZ)) && |
|
4013 !(er32(STATUS) & E1000_STATUS_TXOFF)) { |
|
4014 |
|
4015 /* detected Tx unit hang */ |
|
4016 e_err(drv, "Detected Tx Unit Hang\n" |
|
4017 " Tx Queue <%lu>\n" |
|
4018 " TDH <%x>\n" |
|
4019 " TDT <%x>\n" |
|
4020 " next_to_use <%x>\n" |
|
4021 " next_to_clean <%x>\n" |
|
4022 "buffer_info[next_to_clean]\n" |
|
4023 " time_stamp <%lx>\n" |
|
4024 " next_to_watch <%x>\n" |
|
4025 " jiffies <%lx>\n" |
|
4026 " next_to_watch.status <%x>\n", |
|
4027 (unsigned long)((tx_ring - adapter->tx_ring) / |
|
4028 sizeof(struct e1000_tx_ring)), |
|
4029 readl(hw->hw_addr + tx_ring->tdh), |
|
4030 readl(hw->hw_addr + tx_ring->tdt), |
|
4031 tx_ring->next_to_use, |
|
4032 tx_ring->next_to_clean, |
|
4033 tx_ring->buffer_info[eop].time_stamp, |
|
4034 eop, |
|
4035 jiffies, |
|
4036 eop_desc->upper.fields.status); |
|
4037 e1000_dump(adapter); |
|
4038 netif_stop_queue(netdev); |
|
4039 } |
|
4040 } |
|
4041 adapter->total_tx_bytes += total_tx_bytes; |
|
4042 adapter->total_tx_packets += total_tx_packets; |
|
4043 netdev->stats.tx_bytes += total_tx_bytes; |
|
4044 netdev->stats.tx_packets += total_tx_packets; |
|
4045 return count < tx_ring->count; |
|
4046 } |
|
4047 |
|
4048 /** |
|
4049 * e1000_rx_checksum - Receive Checksum Offload for 82543 |
|
4050 * @adapter: board private structure |
|
4051 * @status_err: receive descriptor status and error fields |
|
4052 * @csum: receive descriptor csum field |
|
4053 * @sk_buff: socket buffer with received data |
|
4054 **/ |
|
4055 |
|
4056 static void e1000_rx_checksum(struct e1000_adapter *adapter, u32 status_err, |
|
4057 u32 csum, struct sk_buff *skb) |
|
4058 { |
|
4059 struct e1000_hw *hw = &adapter->hw; |
|
4060 u16 status = (u16)status_err; |
|
4061 u8 errors = (u8)(status_err >> 24); |
|
4062 |
|
4063 skb_checksum_none_assert(skb); |
|
4064 |
|
4065 /* 82543 or newer only */ |
|
4066 if (unlikely(hw->mac_type < e1000_82543)) return; |
|
4067 /* Ignore Checksum bit is set */ |
|
4068 if (unlikely(status & E1000_RXD_STAT_IXSM)) return; |
|
4069 /* TCP/UDP checksum error bit is set */ |
|
4070 if (unlikely(errors & E1000_RXD_ERR_TCPE)) { |
|
4071 /* let the stack verify checksum errors */ |
|
4072 adapter->hw_csum_err++; |
|
4073 return; |
|
4074 } |
|
4075 /* TCP/UDP Checksum has not been calculated */ |
|
4076 if (!(status & E1000_RXD_STAT_TCPCS)) |
|
4077 return; |
|
4078 |
|
4079 /* It must be a TCP or UDP packet with a valid checksum */ |
|
4080 if (likely(status & E1000_RXD_STAT_TCPCS)) { |
|
4081 /* TCP checksum is good */ |
|
4082 skb->ip_summed = CHECKSUM_UNNECESSARY; |
|
4083 } |
|
4084 adapter->hw_csum_good++; |
|
4085 } |
|
4086 |
|
4087 /** |
|
4088 * e1000_consume_page - helper function |
|
4089 **/ |
|
4090 static void e1000_consume_page(struct e1000_buffer *bi, struct sk_buff *skb, |
|
4091 u16 length) |
|
4092 { |
|
4093 bi->page = NULL; |
|
4094 skb->len += length; |
|
4095 skb->data_len += length; |
|
4096 skb->truesize += PAGE_SIZE; |
|
4097 } |
|
4098 |
|
4099 /** |
|
4100 * e1000_receive_skb - helper function to handle rx indications |
|
4101 * @adapter: board private structure |
|
4102 * @status: descriptor status field as written by hardware |
|
4103 * @vlan: descriptor vlan field as written by hardware (no le/be conversion) |
|
4104 * @skb: pointer to sk_buff to be indicated to stack |
|
4105 */ |
|
4106 static void e1000_receive_skb(struct e1000_adapter *adapter, u8 status, |
|
4107 __le16 vlan, struct sk_buff *skb) |
|
4108 { |
|
4109 skb->protocol = eth_type_trans(skb, adapter->netdev); |
|
4110 |
|
4111 if (status & E1000_RXD_STAT_VP) { |
|
4112 u16 vid = le16_to_cpu(vlan) & E1000_RXD_SPC_VLAN_MASK; |
|
4113 |
|
4114 __vlan_hwaccel_put_tag(skb, vid); |
|
4115 } |
|
4116 napi_gro_receive(&adapter->napi, skb); |
|
4117 } |
|
4118 |
|
4119 /** |
|
4120 * e1000_clean_jumbo_rx_irq - Send received data up the network stack; legacy |
|
4121 * @adapter: board private structure |
|
4122 * @rx_ring: ring to clean |
|
4123 * @work_done: amount of napi work completed this call |
|
4124 * @work_to_do: max amount of work allowed for this call to do |
|
4125 * |
|
4126 * the return value indicates whether actual cleaning was done, there |
|
4127 * is no guarantee that everything was cleaned |
|
4128 */ |
|
4129 static bool e1000_clean_jumbo_rx_irq(struct e1000_adapter *adapter, |
|
4130 struct e1000_rx_ring *rx_ring, |
|
4131 int *work_done, int work_to_do) |
|
4132 { |
|
4133 struct e1000_hw *hw = &adapter->hw; |
|
4134 struct net_device *netdev = adapter->netdev; |
|
4135 struct pci_dev *pdev = adapter->pdev; |
|
4136 struct e1000_rx_desc *rx_desc, *next_rxd; |
|
4137 struct e1000_buffer *buffer_info, *next_buffer; |
|
4138 unsigned long irq_flags; |
|
4139 u32 length; |
|
4140 unsigned int i; |
|
4141 int cleaned_count = 0; |
|
4142 bool cleaned = false; |
|
4143 unsigned int total_rx_bytes=0, total_rx_packets=0; |
|
4144 |
|
4145 i = rx_ring->next_to_clean; |
|
4146 rx_desc = E1000_RX_DESC(*rx_ring, i); |
|
4147 buffer_info = &rx_ring->buffer_info[i]; |
|
4148 |
|
4149 while (rx_desc->status & E1000_RXD_STAT_DD) { |
|
4150 struct sk_buff *skb; |
|
4151 u8 status; |
|
4152 |
|
4153 if (*work_done >= work_to_do) |
|
4154 break; |
|
4155 (*work_done)++; |
|
4156 rmb(); /* read descriptor and rx_buffer_info after status DD */ |
|
4157 |
|
4158 status = rx_desc->status; |
|
4159 skb = buffer_info->skb; |
|
4160 if (!adapter->ecdev) { |
|
4161 buffer_info->skb = NULL; |
|
4162 } |
|
4163 |
|
4164 if (++i == rx_ring->count) i = 0; |
|
4165 next_rxd = E1000_RX_DESC(*rx_ring, i); |
|
4166 prefetch(next_rxd); |
|
4167 |
|
4168 next_buffer = &rx_ring->buffer_info[i]; |
|
4169 |
|
4170 cleaned = true; |
|
4171 cleaned_count++; |
|
4172 dma_unmap_page(&pdev->dev, buffer_info->dma, |
|
4173 buffer_info->length, DMA_FROM_DEVICE); |
|
4174 buffer_info->dma = 0; |
|
4175 |
|
4176 length = le16_to_cpu(rx_desc->length); |
|
4177 |
|
4178 /* errors is only valid for DD + EOP descriptors */ |
|
4179 if (!adapter->ecdev && |
|
4180 unlikely((status & E1000_RXD_STAT_EOP) && |
|
4181 (rx_desc->errors & E1000_RXD_ERR_FRAME_ERR_MASK))) { |
|
4182 u8 last_byte = *(skb->data + length - 1); |
|
4183 if (TBI_ACCEPT(hw, status, rx_desc->errors, length, |
|
4184 last_byte)) { |
|
4185 spin_lock_irqsave(&adapter->stats_lock, |
|
4186 irq_flags); |
|
4187 e1000_tbi_adjust_stats(hw, &adapter->stats, |
|
4188 length, skb->data); |
|
4189 spin_unlock_irqrestore(&adapter->stats_lock, |
|
4190 irq_flags); |
|
4191 length--; |
|
4192 } else { |
|
4193 /* recycle both page and skb */ |
|
4194 buffer_info->skb = skb; |
|
4195 /* an error means any chain goes out the window |
|
4196 * too */ |
|
4197 if (rx_ring->rx_skb_top) |
|
4198 dev_kfree_skb(rx_ring->rx_skb_top); |
|
4199 rx_ring->rx_skb_top = NULL; |
|
4200 goto next_desc; |
|
4201 } |
|
4202 } |
|
4203 |
|
4204 #define rxtop rx_ring->rx_skb_top |
|
4205 if (!(status & E1000_RXD_STAT_EOP)) { |
|
4206 /* this descriptor is only the beginning (or middle) */ |
|
4207 if (!rxtop) { |
|
4208 /* this is the beginning of a chain */ |
|
4209 rxtop = skb; |
|
4210 skb_fill_page_desc(rxtop, 0, buffer_info->page, |
|
4211 0, length); |
|
4212 } else { |
|
4213 /* this is the middle of a chain */ |
|
4214 skb_fill_page_desc(rxtop, |
|
4215 skb_shinfo(rxtop)->nr_frags, |
|
4216 buffer_info->page, 0, length); |
|
4217 /* re-use the skb, only consumed the page */ |
|
4218 buffer_info->skb = skb; |
|
4219 } |
|
4220 e1000_consume_page(buffer_info, rxtop, length); |
|
4221 goto next_desc; |
|
4222 } else { |
|
4223 if (rxtop) { |
|
4224 /* end of the chain */ |
|
4225 skb_fill_page_desc(rxtop, |
|
4226 skb_shinfo(rxtop)->nr_frags, |
|
4227 buffer_info->page, 0, length); |
|
4228 /* re-use the current skb, we only consumed the |
|
4229 * page */ |
|
4230 buffer_info->skb = skb; |
|
4231 skb = rxtop; |
|
4232 rxtop = NULL; |
|
4233 e1000_consume_page(buffer_info, skb, length); |
|
4234 } else { |
|
4235 /* no chain, got EOP, this buf is the packet |
|
4236 * copybreak to save the put_page/alloc_page */ |
|
4237 if (length <= copybreak && |
|
4238 skb_tailroom(skb) >= length) { |
|
4239 u8 *vaddr; |
|
4240 vaddr = kmap_atomic(buffer_info->page); |
|
4241 memcpy(skb_tail_pointer(skb), vaddr, length); |
|
4242 kunmap_atomic(vaddr); |
|
4243 /* re-use the page, so don't erase |
|
4244 * buffer_info->page */ |
|
4245 skb_put(skb, length); |
|
4246 } else { |
|
4247 skb_fill_page_desc(skb, 0, |
|
4248 buffer_info->page, 0, |
|
4249 length); |
|
4250 e1000_consume_page(buffer_info, skb, |
|
4251 length); |
|
4252 } |
|
4253 } |
|
4254 } |
|
4255 |
|
4256 /* Receive Checksum Offload XXX recompute due to CRC strip? */ |
|
4257 e1000_rx_checksum(adapter, |
|
4258 (u32)(status) | |
|
4259 ((u32)(rx_desc->errors) << 24), |
|
4260 le16_to_cpu(rx_desc->csum), skb); |
|
4261 |
|
4262 total_rx_bytes += (skb->len - 4); /* don't count FCS */ |
|
4263 if (likely(!(netdev->features & NETIF_F_RXFCS))) |
|
4264 pskb_trim(skb, skb->len - 4); |
|
4265 total_rx_packets++; |
|
4266 |
|
4267 /* eth type trans needs skb->data to point to something */ |
|
4268 if (!pskb_may_pull(skb, ETH_HLEN)) { |
|
4269 e_err(drv, "pskb_may_pull failed.\n"); |
|
4270 if (!adapter->ecdev) { |
|
4271 dev_kfree_skb(skb); |
|
4272 } |
|
4273 goto next_desc; |
|
4274 } |
|
4275 |
|
4276 if (adapter->ecdev) { |
|
4277 ecdev_receive(adapter->ecdev, skb->data, length); |
|
4278 |
|
4279 // No need to detect link status as |
|
4280 // long as frames are received: Reset watchdog. |
|
4281 adapter->ec_watchdog_jiffies = jiffies; |
|
4282 } else { |
|
4283 e1000_receive_skb(adapter, status, rx_desc->special, skb); |
|
4284 } |
|
4285 |
|
4286 next_desc: |
|
4287 rx_desc->status = 0; |
|
4288 |
|
4289 /* return some buffers to hardware, one at a time is too slow */ |
|
4290 if (unlikely(cleaned_count >= E1000_RX_BUFFER_WRITE)) { |
|
4291 adapter->alloc_rx_buf(adapter, rx_ring, cleaned_count); |
|
4292 cleaned_count = 0; |
|
4293 } |
|
4294 |
|
4295 /* use prefetched values */ |
|
4296 rx_desc = next_rxd; |
|
4297 buffer_info = next_buffer; |
|
4298 } |
|
4299 rx_ring->next_to_clean = i; |
|
4300 |
|
4301 cleaned_count = E1000_DESC_UNUSED(rx_ring); |
|
4302 if (cleaned_count) |
|
4303 adapter->alloc_rx_buf(adapter, rx_ring, cleaned_count); |
|
4304 |
|
4305 adapter->total_rx_packets += total_rx_packets; |
|
4306 adapter->total_rx_bytes += total_rx_bytes; |
|
4307 netdev->stats.rx_bytes += total_rx_bytes; |
|
4308 netdev->stats.rx_packets += total_rx_packets; |
|
4309 return cleaned; |
|
4310 } |
|
4311 |
|
4312 /* |
|
4313 * this should improve performance for small packets with large amounts |
|
4314 * of reassembly being done in the stack |
|
4315 */ |
|
4316 static void e1000_check_copybreak(struct net_device *netdev, |
|
4317 struct e1000_buffer *buffer_info, |
|
4318 u32 length, struct sk_buff **skb) |
|
4319 { |
|
4320 struct e1000_adapter *adapter = netdev_priv(netdev); |
|
4321 struct sk_buff *new_skb; |
|
4322 |
|
4323 if (adapter->ecdev || length > copybreak) |
|
4324 return; |
|
4325 |
|
4326 new_skb = netdev_alloc_skb_ip_align(netdev, length); |
|
4327 if (!new_skb) |
|
4328 return; |
|
4329 |
|
4330 skb_copy_to_linear_data_offset(new_skb, -NET_IP_ALIGN, |
|
4331 (*skb)->data - NET_IP_ALIGN, |
|
4332 length + NET_IP_ALIGN); |
|
4333 /* save the skb in buffer_info as good */ |
|
4334 buffer_info->skb = *skb; |
|
4335 *skb = new_skb; |
|
4336 } |
|
4337 |
|
4338 /** |
|
4339 * e1000_clean_rx_irq - Send received data up the network stack; legacy |
|
4340 * @adapter: board private structure |
|
4341 * @rx_ring: ring to clean |
|
4342 * @work_done: amount of napi work completed this call |
|
4343 * @work_to_do: max amount of work allowed for this call to do |
|
4344 */ |
|
4345 static bool e1000_clean_rx_irq(struct e1000_adapter *adapter, |
|
4346 struct e1000_rx_ring *rx_ring, |
|
4347 int *work_done, int work_to_do) |
|
4348 { |
|
4349 struct e1000_hw *hw = &adapter->hw; |
|
4350 struct net_device *netdev = adapter->netdev; |
|
4351 struct pci_dev *pdev = adapter->pdev; |
|
4352 struct e1000_rx_desc *rx_desc, *next_rxd; |
|
4353 struct e1000_buffer *buffer_info, *next_buffer; |
|
4354 unsigned long flags; |
|
4355 u32 length; |
|
4356 unsigned int i; |
|
4357 int cleaned_count = 0; |
|
4358 bool cleaned = false; |
|
4359 unsigned int total_rx_bytes=0, total_rx_packets=0; |
|
4360 |
|
4361 i = rx_ring->next_to_clean; |
|
4362 rx_desc = E1000_RX_DESC(*rx_ring, i); |
|
4363 buffer_info = &rx_ring->buffer_info[i]; |
|
4364 |
|
4365 while (rx_desc->status & E1000_RXD_STAT_DD) { |
|
4366 struct sk_buff *skb; |
|
4367 u8 status; |
|
4368 |
|
4369 if (*work_done >= work_to_do) |
|
4370 break; |
|
4371 (*work_done)++; |
|
4372 rmb(); /* read descriptor and rx_buffer_info after status DD */ |
|
4373 |
|
4374 status = rx_desc->status; |
|
4375 skb = buffer_info->skb; |
|
4376 if (!adapter->ecdev) { |
|
4377 buffer_info->skb = NULL; |
|
4378 } |
|
4379 |
|
4380 prefetch(skb->data - NET_IP_ALIGN); |
|
4381 |
|
4382 if (++i == rx_ring->count) i = 0; |
|
4383 next_rxd = E1000_RX_DESC(*rx_ring, i); |
|
4384 prefetch(next_rxd); |
|
4385 |
|
4386 next_buffer = &rx_ring->buffer_info[i]; |
|
4387 |
|
4388 cleaned = true; |
|
4389 cleaned_count++; |
|
4390 dma_unmap_single(&pdev->dev, buffer_info->dma, |
|
4391 buffer_info->length, DMA_FROM_DEVICE); |
|
4392 buffer_info->dma = 0; |
|
4393 |
|
4394 length = le16_to_cpu(rx_desc->length); |
|
4395 /* !EOP means multiple descriptors were used to store a single |
|
4396 * packet, if thats the case we need to toss it. In fact, we |
|
4397 * to toss every packet with the EOP bit clear and the next |
|
4398 * frame that _does_ have the EOP bit set, as it is by |
|
4399 * definition only a frame fragment |
|
4400 */ |
|
4401 if (unlikely(!(status & E1000_RXD_STAT_EOP))) |
|
4402 adapter->discarding = true; |
|
4403 |
|
4404 if (adapter->discarding) { |
|
4405 /* All receives must fit into a single buffer */ |
|
4406 e_dbg("Receive packet consumed multiple buffers\n"); |
|
4407 /* recycle */ |
|
4408 buffer_info->skb = skb; |
|
4409 if (status & E1000_RXD_STAT_EOP) |
|
4410 adapter->discarding = false; |
|
4411 goto next_desc; |
|
4412 } |
|
4413 |
|
4414 if (!adapter->ecdev && |
|
4415 unlikely(rx_desc->errors & E1000_RXD_ERR_FRAME_ERR_MASK)) { |
|
4416 u8 last_byte = *(skb->data + length - 1); |
|
4417 if (TBI_ACCEPT(hw, status, rx_desc->errors, length, |
|
4418 last_byte)) { |
|
4419 spin_lock_irqsave(&adapter->stats_lock, flags); |
|
4420 e1000_tbi_adjust_stats(hw, &adapter->stats, |
|
4421 length, skb->data); |
|
4422 spin_unlock_irqrestore(&adapter->stats_lock, |
|
4423 flags); |
|
4424 length--; |
|
4425 } else { |
|
4426 /* recycle */ |
|
4427 buffer_info->skb = skb; |
|
4428 goto next_desc; |
|
4429 } |
|
4430 } |
|
4431 |
|
4432 total_rx_bytes += (length - 4); /* don't count FCS */ |
|
4433 total_rx_packets++; |
|
4434 |
|
4435 if (likely(!(netdev->features & NETIF_F_RXFCS))) |
|
4436 /* adjust length to remove Ethernet CRC, this must be |
|
4437 * done after the TBI_ACCEPT workaround above |
|
4438 */ |
|
4439 length -= 4; |
|
4440 |
|
4441 e1000_check_copybreak(netdev, buffer_info, length, &skb); |
|
4442 |
|
4443 skb_put(skb, length); |
|
4444 |
|
4445 /* Receive Checksum Offload */ |
|
4446 e1000_rx_checksum(adapter, |
|
4447 (u32)(status) | |
|
4448 ((u32)(rx_desc->errors) << 24), |
|
4449 le16_to_cpu(rx_desc->csum), skb); |
|
4450 |
|
4451 if (adapter->ecdev) { |
|
4452 ecdev_receive(adapter->ecdev, skb->data, length); |
|
4453 |
|
4454 // No need to detect link status as |
|
4455 // long as frames are received: Reset watchdog. |
|
4456 adapter->ec_watchdog_jiffies = jiffies; |
|
4457 } else { |
|
4458 e1000_receive_skb(adapter, status, rx_desc->special, skb); |
|
4459 } |
|
4460 |
|
4461 next_desc: |
|
4462 rx_desc->status = 0; |
|
4463 |
|
4464 /* return some buffers to hardware, one at a time is too slow */ |
|
4465 if (unlikely(cleaned_count >= E1000_RX_BUFFER_WRITE)) { |
|
4466 adapter->alloc_rx_buf(adapter, rx_ring, cleaned_count); |
|
4467 cleaned_count = 0; |
|
4468 } |
|
4469 |
|
4470 /* use prefetched values */ |
|
4471 rx_desc = next_rxd; |
|
4472 buffer_info = next_buffer; |
|
4473 } |
|
4474 rx_ring->next_to_clean = i; |
|
4475 |
|
4476 cleaned_count = E1000_DESC_UNUSED(rx_ring); |
|
4477 if (cleaned_count) |
|
4478 adapter->alloc_rx_buf(adapter, rx_ring, cleaned_count); |
|
4479 |
|
4480 adapter->total_rx_packets += total_rx_packets; |
|
4481 adapter->total_rx_bytes += total_rx_bytes; |
|
4482 netdev->stats.rx_bytes += total_rx_bytes; |
|
4483 netdev->stats.rx_packets += total_rx_packets; |
|
4484 return cleaned; |
|
4485 } |
|
4486 |
|
4487 /** |
|
4488 * e1000_alloc_jumbo_rx_buffers - Replace used jumbo receive buffers |
|
4489 * @adapter: address of board private structure |
|
4490 * @rx_ring: pointer to receive ring structure |
|
4491 * @cleaned_count: number of buffers to allocate this pass |
|
4492 **/ |
|
4493 |
|
4494 static void |
|
4495 e1000_alloc_jumbo_rx_buffers(struct e1000_adapter *adapter, |
|
4496 struct e1000_rx_ring *rx_ring, int cleaned_count) |
|
4497 { |
|
4498 struct net_device *netdev = adapter->netdev; |
|
4499 struct pci_dev *pdev = adapter->pdev; |
|
4500 struct e1000_rx_desc *rx_desc; |
|
4501 struct e1000_buffer *buffer_info; |
|
4502 struct sk_buff *skb; |
|
4503 unsigned int i; |
|
4504 unsigned int bufsz = 256 - 16 /*for skb_reserve */ ; |
|
4505 |
|
4506 i = rx_ring->next_to_use; |
|
4507 buffer_info = &rx_ring->buffer_info[i]; |
|
4508 |
|
4509 while (cleaned_count--) { |
|
4510 skb = buffer_info->skb; |
|
4511 if (skb) { |
|
4512 skb_trim(skb, 0); |
|
4513 goto check_page; |
|
4514 } |
|
4515 |
|
4516 skb = netdev_alloc_skb_ip_align(netdev, bufsz); |
|
4517 if (unlikely(!skb)) { |
|
4518 /* Better luck next round */ |
|
4519 adapter->alloc_rx_buff_failed++; |
|
4520 break; |
|
4521 } |
|
4522 |
|
4523 /* Fix for errata 23, can't cross 64kB boundary */ |
|
4524 if (!e1000_check_64k_bound(adapter, skb->data, bufsz)) { |
|
4525 struct sk_buff *oldskb = skb; |
|
4526 e_err(rx_err, "skb align check failed: %u bytes at " |
|
4527 "%p\n", bufsz, skb->data); |
|
4528 /* Try again, without freeing the previous */ |
|
4529 skb = netdev_alloc_skb_ip_align(netdev, bufsz); |
|
4530 /* Failed allocation, critical failure */ |
|
4531 if (!skb) { |
|
4532 dev_kfree_skb(oldskb); |
|
4533 adapter->alloc_rx_buff_failed++; |
|
4534 break; |
|
4535 } |
|
4536 |
|
4537 if (!e1000_check_64k_bound(adapter, skb->data, bufsz)) { |
|
4538 /* give up */ |
|
4539 dev_kfree_skb(skb); |
|
4540 dev_kfree_skb(oldskb); |
|
4541 break; /* while (cleaned_count--) */ |
|
4542 } |
|
4543 |
|
4544 /* Use new allocation */ |
|
4545 dev_kfree_skb(oldskb); |
|
4546 } |
|
4547 buffer_info->skb = skb; |
|
4548 buffer_info->length = adapter->rx_buffer_len; |
|
4549 check_page: |
|
4550 /* allocate a new page if necessary */ |
|
4551 if (!buffer_info->page) { |
|
4552 buffer_info->page = alloc_page(GFP_ATOMIC); |
|
4553 if (unlikely(!buffer_info->page)) { |
|
4554 adapter->alloc_rx_buff_failed++; |
|
4555 break; |
|
4556 } |
|
4557 } |
|
4558 |
|
4559 if (!buffer_info->dma) { |
|
4560 buffer_info->dma = dma_map_page(&pdev->dev, |
|
4561 buffer_info->page, 0, |
|
4562 buffer_info->length, |
|
4563 DMA_FROM_DEVICE); |
|
4564 if (dma_mapping_error(&pdev->dev, buffer_info->dma)) { |
|
4565 put_page(buffer_info->page); |
|
4566 dev_kfree_skb(skb); |
|
4567 buffer_info->page = NULL; |
|
4568 buffer_info->skb = NULL; |
|
4569 buffer_info->dma = 0; |
|
4570 adapter->alloc_rx_buff_failed++; |
|
4571 break; /* while !buffer_info->skb */ |
|
4572 } |
|
4573 } |
|
4574 |
|
4575 rx_desc = E1000_RX_DESC(*rx_ring, i); |
|
4576 rx_desc->buffer_addr = cpu_to_le64(buffer_info->dma); |
|
4577 |
|
4578 if (unlikely(++i == rx_ring->count)) |
|
4579 i = 0; |
|
4580 buffer_info = &rx_ring->buffer_info[i]; |
|
4581 } |
|
4582 |
|
4583 if (likely(rx_ring->next_to_use != i)) { |
|
4584 rx_ring->next_to_use = i; |
|
4585 if (unlikely(i-- == 0)) |
|
4586 i = (rx_ring->count - 1); |
|
4587 |
|
4588 /* Force memory writes to complete before letting h/w |
|
4589 * know there are new descriptors to fetch. (Only |
|
4590 * applicable for weak-ordered memory model archs, |
|
4591 * such as IA-64). */ |
|
4592 wmb(); |
|
4593 writel(i, adapter->hw.hw_addr + rx_ring->rdt); |
|
4594 } |
|
4595 } |
|
4596 |
|
4597 /** |
|
4598 * e1000_alloc_rx_buffers - Replace used receive buffers; legacy & extended |
|
4599 * @adapter: address of board private structure |
|
4600 **/ |
|
4601 |
|
4602 static void e1000_alloc_rx_buffers(struct e1000_adapter *adapter, |
|
4603 struct e1000_rx_ring *rx_ring, |
|
4604 int cleaned_count) |
|
4605 { |
|
4606 struct e1000_hw *hw = &adapter->hw; |
|
4607 struct net_device *netdev = adapter->netdev; |
|
4608 struct pci_dev *pdev = adapter->pdev; |
|
4609 struct e1000_rx_desc *rx_desc; |
|
4610 struct e1000_buffer *buffer_info; |
|
4611 struct sk_buff *skb; |
|
4612 unsigned int i; |
|
4613 unsigned int bufsz = adapter->rx_buffer_len; |
|
4614 |
|
4615 i = rx_ring->next_to_use; |
|
4616 buffer_info = &rx_ring->buffer_info[i]; |
|
4617 |
|
4618 while (cleaned_count--) { |
|
4619 skb = buffer_info->skb; |
|
4620 if (skb) { |
|
4621 skb_trim(skb, 0); |
|
4622 goto map_skb; |
|
4623 } |
|
4624 |
|
4625 skb = netdev_alloc_skb_ip_align(netdev, bufsz); |
|
4626 if (unlikely(!skb)) { |
|
4627 /* Better luck next round */ |
|
4628 adapter->alloc_rx_buff_failed++; |
|
4629 break; |
|
4630 } |
|
4631 |
|
4632 /* Fix for errata 23, can't cross 64kB boundary */ |
|
4633 if (!e1000_check_64k_bound(adapter, skb->data, bufsz)) { |
|
4634 struct sk_buff *oldskb = skb; |
|
4635 e_err(rx_err, "skb align check failed: %u bytes at " |
|
4636 "%p\n", bufsz, skb->data); |
|
4637 /* Try again, without freeing the previous */ |
|
4638 skb = netdev_alloc_skb_ip_align(netdev, bufsz); |
|
4639 /* Failed allocation, critical failure */ |
|
4640 if (!skb) { |
|
4641 dev_kfree_skb(oldskb); |
|
4642 adapter->alloc_rx_buff_failed++; |
|
4643 break; |
|
4644 } |
|
4645 |
|
4646 if (!e1000_check_64k_bound(adapter, skb->data, bufsz)) { |
|
4647 /* give up */ |
|
4648 dev_kfree_skb(skb); |
|
4649 dev_kfree_skb(oldskb); |
|
4650 adapter->alloc_rx_buff_failed++; |
|
4651 break; /* while !buffer_info->skb */ |
|
4652 } |
|
4653 |
|
4654 /* Use new allocation */ |
|
4655 dev_kfree_skb(oldskb); |
|
4656 } |
|
4657 buffer_info->skb = skb; |
|
4658 buffer_info->length = adapter->rx_buffer_len; |
|
4659 map_skb: |
|
4660 buffer_info->dma = dma_map_single(&pdev->dev, |
|
4661 skb->data, |
|
4662 buffer_info->length, |
|
4663 DMA_FROM_DEVICE); |
|
4664 if (dma_mapping_error(&pdev->dev, buffer_info->dma)) { |
|
4665 dev_kfree_skb(skb); |
|
4666 buffer_info->skb = NULL; |
|
4667 buffer_info->dma = 0; |
|
4668 adapter->alloc_rx_buff_failed++; |
|
4669 break; /* while !buffer_info->skb */ |
|
4670 } |
|
4671 |
|
4672 /* |
|
4673 * XXX if it was allocated cleanly it will never map to a |
|
4674 * boundary crossing |
|
4675 */ |
|
4676 |
|
4677 /* Fix for errata 23, can't cross 64kB boundary */ |
|
4678 if (!e1000_check_64k_bound(adapter, |
|
4679 (void *)(unsigned long)buffer_info->dma, |
|
4680 adapter->rx_buffer_len)) { |
|
4681 e_err(rx_err, "dma align check failed: %u bytes at " |
|
4682 "%p\n", adapter->rx_buffer_len, |
|
4683 (void *)(unsigned long)buffer_info->dma); |
|
4684 dev_kfree_skb(skb); |
|
4685 buffer_info->skb = NULL; |
|
4686 |
|
4687 dma_unmap_single(&pdev->dev, buffer_info->dma, |
|
4688 adapter->rx_buffer_len, |
|
4689 DMA_FROM_DEVICE); |
|
4690 buffer_info->dma = 0; |
|
4691 |
|
4692 adapter->alloc_rx_buff_failed++; |
|
4693 break; /* while !buffer_info->skb */ |
|
4694 } |
|
4695 rx_desc = E1000_RX_DESC(*rx_ring, i); |
|
4696 rx_desc->buffer_addr = cpu_to_le64(buffer_info->dma); |
|
4697 |
|
4698 if (unlikely(++i == rx_ring->count)) |
|
4699 i = 0; |
|
4700 buffer_info = &rx_ring->buffer_info[i]; |
|
4701 } |
|
4702 |
|
4703 if (likely(rx_ring->next_to_use != i)) { |
|
4704 rx_ring->next_to_use = i; |
|
4705 if (unlikely(i-- == 0)) |
|
4706 i = (rx_ring->count - 1); |
|
4707 |
|
4708 /* Force memory writes to complete before letting h/w |
|
4709 * know there are new descriptors to fetch. (Only |
|
4710 * applicable for weak-ordered memory model archs, |
|
4711 * such as IA-64). */ |
|
4712 wmb(); |
|
4713 writel(i, hw->hw_addr + rx_ring->rdt); |
|
4714 } |
|
4715 } |
|
4716 |
|
4717 /** |
|
4718 * e1000_smartspeed - Workaround for SmartSpeed on 82541 and 82547 controllers. |
|
4719 * @adapter: |
|
4720 **/ |
|
4721 |
|
4722 static void e1000_smartspeed(struct e1000_adapter *adapter) |
|
4723 { |
|
4724 struct e1000_hw *hw = &adapter->hw; |
|
4725 u16 phy_status; |
|
4726 u16 phy_ctrl; |
|
4727 |
|
4728 if ((hw->phy_type != e1000_phy_igp) || !hw->autoneg || |
|
4729 !(hw->autoneg_advertised & ADVERTISE_1000_FULL)) |
|
4730 return; |
|
4731 |
|
4732 if (adapter->smartspeed == 0) { |
|
4733 /* If Master/Slave config fault is asserted twice, |
|
4734 * we assume back-to-back */ |
|
4735 e1000_read_phy_reg(hw, PHY_1000T_STATUS, &phy_status); |
|
4736 if (!(phy_status & SR_1000T_MS_CONFIG_FAULT)) return; |
|
4737 e1000_read_phy_reg(hw, PHY_1000T_STATUS, &phy_status); |
|
4738 if (!(phy_status & SR_1000T_MS_CONFIG_FAULT)) return; |
|
4739 e1000_read_phy_reg(hw, PHY_1000T_CTRL, &phy_ctrl); |
|
4740 if (phy_ctrl & CR_1000T_MS_ENABLE) { |
|
4741 phy_ctrl &= ~CR_1000T_MS_ENABLE; |
|
4742 e1000_write_phy_reg(hw, PHY_1000T_CTRL, |
|
4743 phy_ctrl); |
|
4744 adapter->smartspeed++; |
|
4745 if (!e1000_phy_setup_autoneg(hw) && |
|
4746 !e1000_read_phy_reg(hw, PHY_CTRL, |
|
4747 &phy_ctrl)) { |
|
4748 phy_ctrl |= (MII_CR_AUTO_NEG_EN | |
|
4749 MII_CR_RESTART_AUTO_NEG); |
|
4750 e1000_write_phy_reg(hw, PHY_CTRL, |
|
4751 phy_ctrl); |
|
4752 } |
|
4753 } |
|
4754 return; |
|
4755 } else if (adapter->smartspeed == E1000_SMARTSPEED_DOWNSHIFT) { |
|
4756 /* If still no link, perhaps using 2/3 pair cable */ |
|
4757 e1000_read_phy_reg(hw, PHY_1000T_CTRL, &phy_ctrl); |
|
4758 phy_ctrl |= CR_1000T_MS_ENABLE; |
|
4759 e1000_write_phy_reg(hw, PHY_1000T_CTRL, phy_ctrl); |
|
4760 if (!e1000_phy_setup_autoneg(hw) && |
|
4761 !e1000_read_phy_reg(hw, PHY_CTRL, &phy_ctrl)) { |
|
4762 phy_ctrl |= (MII_CR_AUTO_NEG_EN | |
|
4763 MII_CR_RESTART_AUTO_NEG); |
|
4764 e1000_write_phy_reg(hw, PHY_CTRL, phy_ctrl); |
|
4765 } |
|
4766 } |
|
4767 /* Restart process after E1000_SMARTSPEED_MAX iterations */ |
|
4768 if (adapter->smartspeed++ == E1000_SMARTSPEED_MAX) |
|
4769 adapter->smartspeed = 0; |
|
4770 } |
|
4771 |
|
4772 /** |
|
4773 * e1000_ioctl - |
|
4774 * @netdev: |
|
4775 * @ifreq: |
|
4776 * @cmd: |
|
4777 **/ |
|
4778 |
|
4779 static int e1000_ioctl(struct net_device *netdev, struct ifreq *ifr, int cmd) |
|
4780 { |
|
4781 switch (cmd) { |
|
4782 case SIOCGMIIPHY: |
|
4783 case SIOCGMIIREG: |
|
4784 case SIOCSMIIREG: |
|
4785 return e1000_mii_ioctl(netdev, ifr, cmd); |
|
4786 default: |
|
4787 return -EOPNOTSUPP; |
|
4788 } |
|
4789 } |
|
4790 |
|
4791 /** |
|
4792 * e1000_mii_ioctl - |
|
4793 * @netdev: |
|
4794 * @ifreq: |
|
4795 * @cmd: |
|
4796 **/ |
|
4797 |
|
4798 static int e1000_mii_ioctl(struct net_device *netdev, struct ifreq *ifr, |
|
4799 int cmd) |
|
4800 { |
|
4801 struct e1000_adapter *adapter = netdev_priv(netdev); |
|
4802 struct e1000_hw *hw = &adapter->hw; |
|
4803 struct mii_ioctl_data *data = if_mii(ifr); |
|
4804 int retval; |
|
4805 u16 mii_reg; |
|
4806 unsigned long flags; |
|
4807 |
|
4808 if (hw->media_type != e1000_media_type_copper) |
|
4809 return -EOPNOTSUPP; |
|
4810 |
|
4811 switch (cmd) { |
|
4812 case SIOCGMIIPHY: |
|
4813 data->phy_id = hw->phy_addr; |
|
4814 break; |
|
4815 case SIOCGMIIREG: |
|
4816 if (adapter->ecdev) { |
|
4817 return -EPERM; |
|
4818 } |
|
4819 spin_lock_irqsave(&adapter->stats_lock, flags); |
|
4820 if (e1000_read_phy_reg(hw, data->reg_num & 0x1F, |
|
4821 &data->val_out)) { |
|
4822 spin_unlock_irqrestore(&adapter->stats_lock, flags); |
|
4823 return -EIO; |
|
4824 } |
|
4825 spin_unlock_irqrestore(&adapter->stats_lock, flags); |
|
4826 break; |
|
4827 case SIOCSMIIREG: |
|
4828 if (adapter->ecdev) { |
|
4829 return -EPERM; |
|
4830 } |
|
4831 if (data->reg_num & ~(0x1F)) |
|
4832 return -EFAULT; |
|
4833 mii_reg = data->val_in; |
|
4834 spin_lock_irqsave(&adapter->stats_lock, flags); |
|
4835 if (e1000_write_phy_reg(hw, data->reg_num, |
|
4836 mii_reg)) { |
|
4837 spin_unlock_irqrestore(&adapter->stats_lock, flags); |
|
4838 return -EIO; |
|
4839 } |
|
4840 spin_unlock_irqrestore(&adapter->stats_lock, flags); |
|
4841 if (hw->media_type == e1000_media_type_copper) { |
|
4842 switch (data->reg_num) { |
|
4843 case PHY_CTRL: |
|
4844 if (mii_reg & MII_CR_POWER_DOWN) |
|
4845 break; |
|
4846 if (mii_reg & MII_CR_AUTO_NEG_EN) { |
|
4847 hw->autoneg = 1; |
|
4848 hw->autoneg_advertised = 0x2F; |
|
4849 } else { |
|
4850 u32 speed; |
|
4851 if (mii_reg & 0x40) |
|
4852 speed = SPEED_1000; |
|
4853 else if (mii_reg & 0x2000) |
|
4854 speed = SPEED_100; |
|
4855 else |
|
4856 speed = SPEED_10; |
|
4857 retval = e1000_set_spd_dplx( |
|
4858 adapter, speed, |
|
4859 ((mii_reg & 0x100) |
|
4860 ? DUPLEX_FULL : |
|
4861 DUPLEX_HALF)); |
|
4862 if (retval) |
|
4863 return retval; |
|
4864 } |
|
4865 if (netif_running(adapter->netdev)) |
|
4866 e1000_reinit_locked(adapter); |
|
4867 else |
|
4868 e1000_reset(adapter); |
|
4869 break; |
|
4870 case M88E1000_PHY_SPEC_CTRL: |
|
4871 case M88E1000_EXT_PHY_SPEC_CTRL: |
|
4872 if (e1000_phy_reset(hw)) |
|
4873 return -EIO; |
|
4874 break; |
|
4875 } |
|
4876 } else { |
|
4877 switch (data->reg_num) { |
|
4878 case PHY_CTRL: |
|
4879 if (mii_reg & MII_CR_POWER_DOWN) |
|
4880 break; |
|
4881 if (netif_running(adapter->netdev)) |
|
4882 e1000_reinit_locked(adapter); |
|
4883 else |
|
4884 e1000_reset(adapter); |
|
4885 break; |
|
4886 } |
|
4887 } |
|
4888 break; |
|
4889 default: |
|
4890 return -EOPNOTSUPP; |
|
4891 } |
|
4892 return E1000_SUCCESS; |
|
4893 } |
|
4894 |
|
4895 void e1000_pci_set_mwi(struct e1000_hw *hw) |
|
4896 { |
|
4897 struct e1000_adapter *adapter = hw->back; |
|
4898 int ret_val = pci_set_mwi(adapter->pdev); |
|
4899 |
|
4900 if (ret_val) |
|
4901 e_err(probe, "Error in setting MWI\n"); |
|
4902 } |
|
4903 |
|
4904 void e1000_pci_clear_mwi(struct e1000_hw *hw) |
|
4905 { |
|
4906 struct e1000_adapter *adapter = hw->back; |
|
4907 |
|
4908 pci_clear_mwi(adapter->pdev); |
|
4909 } |
|
4910 |
|
4911 int e1000_pcix_get_mmrbc(struct e1000_hw *hw) |
|
4912 { |
|
4913 struct e1000_adapter *adapter = hw->back; |
|
4914 return pcix_get_mmrbc(adapter->pdev); |
|
4915 } |
|
4916 |
|
4917 void e1000_pcix_set_mmrbc(struct e1000_hw *hw, int mmrbc) |
|
4918 { |
|
4919 struct e1000_adapter *adapter = hw->back; |
|
4920 pcix_set_mmrbc(adapter->pdev, mmrbc); |
|
4921 } |
|
4922 |
|
4923 void e1000_io_write(struct e1000_hw *hw, unsigned long port, u32 value) |
|
4924 { |
|
4925 outl(value, port); |
|
4926 } |
|
4927 |
|
4928 static bool e1000_vlan_used(struct e1000_adapter *adapter) |
|
4929 { |
|
4930 u16 vid; |
|
4931 |
|
4932 for_each_set_bit(vid, adapter->active_vlans, VLAN_N_VID) |
|
4933 return true; |
|
4934 return false; |
|
4935 } |
|
4936 |
|
4937 static void __e1000_vlan_mode(struct e1000_adapter *adapter, |
|
4938 netdev_features_t features) |
|
4939 { |
|
4940 struct e1000_hw *hw = &adapter->hw; |
|
4941 u32 ctrl; |
|
4942 |
|
4943 ctrl = er32(CTRL); |
|
4944 if (features & NETIF_F_HW_VLAN_RX) { |
|
4945 /* enable VLAN tag insert/strip */ |
|
4946 ctrl |= E1000_CTRL_VME; |
|
4947 } else { |
|
4948 /* disable VLAN tag insert/strip */ |
|
4949 ctrl &= ~E1000_CTRL_VME; |
|
4950 } |
|
4951 ew32(CTRL, ctrl); |
|
4952 } |
|
4953 static void e1000_vlan_filter_on_off(struct e1000_adapter *adapter, |
|
4954 bool filter_on) |
|
4955 { |
|
4956 struct e1000_hw *hw = &adapter->hw; |
|
4957 u32 rctl; |
|
4958 |
|
4959 if (!test_bit(__E1000_DOWN, &adapter->flags)) |
|
4960 e1000_irq_disable(adapter); |
|
4961 |
|
4962 __e1000_vlan_mode(adapter, adapter->netdev->features); |
|
4963 if (filter_on) { |
|
4964 /* enable VLAN receive filtering */ |
|
4965 rctl = er32(RCTL); |
|
4966 rctl &= ~E1000_RCTL_CFIEN; |
|
4967 if (!(adapter->netdev->flags & IFF_PROMISC)) |
|
4968 rctl |= E1000_RCTL_VFE; |
|
4969 ew32(RCTL, rctl); |
|
4970 e1000_update_mng_vlan(adapter); |
|
4971 } else { |
|
4972 /* disable VLAN receive filtering */ |
|
4973 rctl = er32(RCTL); |
|
4974 rctl &= ~E1000_RCTL_VFE; |
|
4975 ew32(RCTL, rctl); |
|
4976 } |
|
4977 |
|
4978 if (!test_bit(__E1000_DOWN, &adapter->flags)) |
|
4979 e1000_irq_enable(adapter); |
|
4980 } |
|
4981 |
|
4982 static void e1000_vlan_mode(struct net_device *netdev, |
|
4983 netdev_features_t features) |
|
4984 { |
|
4985 struct e1000_adapter *adapter = netdev_priv(netdev); |
|
4986 |
|
4987 if (!test_bit(__E1000_DOWN, &adapter->flags)) |
|
4988 e1000_irq_disable(adapter); |
|
4989 |
|
4990 __e1000_vlan_mode(adapter, features); |
|
4991 |
|
4992 if (!test_bit(__E1000_DOWN, &adapter->flags)) |
|
4993 e1000_irq_enable(adapter); |
|
4994 } |
|
4995 |
|
4996 static int e1000_vlan_rx_add_vid(struct net_device *netdev, u16 vid) |
|
4997 { |
|
4998 struct e1000_adapter *adapter = netdev_priv(netdev); |
|
4999 struct e1000_hw *hw = &adapter->hw; |
|
5000 u32 vfta, index; |
|
5001 |
|
5002 if ((hw->mng_cookie.status & |
|
5003 E1000_MNG_DHCP_COOKIE_STATUS_VLAN_SUPPORT) && |
|
5004 (vid == adapter->mng_vlan_id)) |
|
5005 return 0; |
|
5006 |
|
5007 if (!e1000_vlan_used(adapter)) |
|
5008 e1000_vlan_filter_on_off(adapter, true); |
|
5009 |
|
5010 /* add VID to filter table */ |
|
5011 index = (vid >> 5) & 0x7F; |
|
5012 vfta = E1000_READ_REG_ARRAY(hw, VFTA, index); |
|
5013 vfta |= (1 << (vid & 0x1F)); |
|
5014 e1000_write_vfta(hw, index, vfta); |
|
5015 |
|
5016 set_bit(vid, adapter->active_vlans); |
|
5017 |
|
5018 return 0; |
|
5019 } |
|
5020 |
|
5021 static int e1000_vlan_rx_kill_vid(struct net_device *netdev, u16 vid) |
|
5022 { |
|
5023 struct e1000_adapter *adapter = netdev_priv(netdev); |
|
5024 struct e1000_hw *hw = &adapter->hw; |
|
5025 u32 vfta, index; |
|
5026 |
|
5027 if (!test_bit(__E1000_DOWN, &adapter->flags)) |
|
5028 e1000_irq_disable(adapter); |
|
5029 if (!test_bit(__E1000_DOWN, &adapter->flags)) |
|
5030 e1000_irq_enable(adapter); |
|
5031 |
|
5032 /* remove VID from filter table */ |
|
5033 index = (vid >> 5) & 0x7F; |
|
5034 vfta = E1000_READ_REG_ARRAY(hw, VFTA, index); |
|
5035 vfta &= ~(1 << (vid & 0x1F)); |
|
5036 e1000_write_vfta(hw, index, vfta); |
|
5037 |
|
5038 clear_bit(vid, adapter->active_vlans); |
|
5039 |
|
5040 if (!e1000_vlan_used(adapter)) |
|
5041 e1000_vlan_filter_on_off(adapter, false); |
|
5042 |
|
5043 return 0; |
|
5044 } |
|
5045 |
|
5046 static void e1000_restore_vlan(struct e1000_adapter *adapter) |
|
5047 { |
|
5048 u16 vid; |
|
5049 |
|
5050 if (!e1000_vlan_used(adapter)) |
|
5051 return; |
|
5052 |
|
5053 e1000_vlan_filter_on_off(adapter, true); |
|
5054 for_each_set_bit(vid, adapter->active_vlans, VLAN_N_VID) |
|
5055 e1000_vlan_rx_add_vid(adapter->netdev, vid); |
|
5056 } |
|
5057 |
|
5058 int e1000_set_spd_dplx(struct e1000_adapter *adapter, u32 spd, u8 dplx) |
|
5059 { |
|
5060 struct e1000_hw *hw = &adapter->hw; |
|
5061 |
|
5062 hw->autoneg = 0; |
|
5063 |
|
5064 /* Make sure dplx is at most 1 bit and lsb of speed is not set |
|
5065 * for the switch() below to work */ |
|
5066 if ((spd & 1) || (dplx & ~1)) |
|
5067 goto err_inval; |
|
5068 |
|
5069 /* Fiber NICs only allow 1000 gbps Full duplex */ |
|
5070 if ((hw->media_type == e1000_media_type_fiber) && |
|
5071 spd != SPEED_1000 && |
|
5072 dplx != DUPLEX_FULL) |
|
5073 goto err_inval; |
|
5074 |
|
5075 switch (spd + dplx) { |
|
5076 case SPEED_10 + DUPLEX_HALF: |
|
5077 hw->forced_speed_duplex = e1000_10_half; |
|
5078 break; |
|
5079 case SPEED_10 + DUPLEX_FULL: |
|
5080 hw->forced_speed_duplex = e1000_10_full; |
|
5081 break; |
|
5082 case SPEED_100 + DUPLEX_HALF: |
|
5083 hw->forced_speed_duplex = e1000_100_half; |
|
5084 break; |
|
5085 case SPEED_100 + DUPLEX_FULL: |
|
5086 hw->forced_speed_duplex = e1000_100_full; |
|
5087 break; |
|
5088 case SPEED_1000 + DUPLEX_FULL: |
|
5089 hw->autoneg = 1; |
|
5090 hw->autoneg_advertised = ADVERTISE_1000_FULL; |
|
5091 break; |
|
5092 case SPEED_1000 + DUPLEX_HALF: /* not supported */ |
|
5093 default: |
|
5094 goto err_inval; |
|
5095 } |
|
5096 return 0; |
|
5097 |
|
5098 err_inval: |
|
5099 e_err(probe, "Unsupported Speed/Duplex configuration\n"); |
|
5100 return -EINVAL; |
|
5101 } |
|
5102 |
|
5103 static int __e1000_shutdown(struct pci_dev *pdev, bool *enable_wake) |
|
5104 { |
|
5105 struct net_device *netdev = pci_get_drvdata(pdev); |
|
5106 struct e1000_adapter *adapter = netdev_priv(netdev); |
|
5107 struct e1000_hw *hw = &adapter->hw; |
|
5108 u32 ctrl, ctrl_ext, rctl, status; |
|
5109 u32 wufc = adapter->wol; |
|
5110 #ifdef CONFIG_PM |
|
5111 int retval = 0; |
|
5112 #endif |
|
5113 |
|
5114 if (adapter->ecdev) { |
|
5115 return -EBUSY; |
|
5116 } |
|
5117 |
|
5118 netif_device_detach(netdev); |
|
5119 |
|
5120 if (netif_running(netdev)) { |
|
5121 WARN_ON(test_bit(__E1000_RESETTING, &adapter->flags)); |
|
5122 e1000_down(adapter); |
|
5123 } |
|
5124 |
|
5125 #ifdef CONFIG_PM |
|
5126 retval = pci_save_state(pdev); |
|
5127 if (retval) |
|
5128 return retval; |
|
5129 #endif |
|
5130 |
|
5131 status = er32(STATUS); |
|
5132 if (status & E1000_STATUS_LU) |
|
5133 wufc &= ~E1000_WUFC_LNKC; |
|
5134 |
|
5135 if (wufc) { |
|
5136 e1000_setup_rctl(adapter); |
|
5137 e1000_set_rx_mode(netdev); |
|
5138 |
|
5139 rctl = er32(RCTL); |
|
5140 |
|
5141 /* turn on all-multi mode if wake on multicast is enabled */ |
|
5142 if (wufc & E1000_WUFC_MC) |
|
5143 rctl |= E1000_RCTL_MPE; |
|
5144 |
|
5145 /* enable receives in the hardware */ |
|
5146 ew32(RCTL, rctl | E1000_RCTL_EN); |
|
5147 |
|
5148 if (hw->mac_type >= e1000_82540) { |
|
5149 ctrl = er32(CTRL); |
|
5150 /* advertise wake from D3Cold */ |
|
5151 #define E1000_CTRL_ADVD3WUC 0x00100000 |
|
5152 /* phy power management enable */ |
|
5153 #define E1000_CTRL_EN_PHY_PWR_MGMT 0x00200000 |
|
5154 ctrl |= E1000_CTRL_ADVD3WUC | |
|
5155 E1000_CTRL_EN_PHY_PWR_MGMT; |
|
5156 ew32(CTRL, ctrl); |
|
5157 } |
|
5158 |
|
5159 if (hw->media_type == e1000_media_type_fiber || |
|
5160 hw->media_type == e1000_media_type_internal_serdes) { |
|
5161 /* keep the laser running in D3 */ |
|
5162 ctrl_ext = er32(CTRL_EXT); |
|
5163 ctrl_ext |= E1000_CTRL_EXT_SDP7_DATA; |
|
5164 ew32(CTRL_EXT, ctrl_ext); |
|
5165 } |
|
5166 |
|
5167 ew32(WUC, E1000_WUC_PME_EN); |
|
5168 ew32(WUFC, wufc); |
|
5169 } else { |
|
5170 ew32(WUC, 0); |
|
5171 ew32(WUFC, 0); |
|
5172 } |
|
5173 |
|
5174 e1000_release_manageability(adapter); |
|
5175 |
|
5176 *enable_wake = !!wufc; |
|
5177 |
|
5178 /* make sure adapter isn't asleep if manageability is enabled */ |
|
5179 if (adapter->en_mng_pt) |
|
5180 *enable_wake = true; |
|
5181 |
|
5182 if (netif_running(netdev)) |
|
5183 e1000_free_irq(adapter); |
|
5184 |
|
5185 pci_disable_device(pdev); |
|
5186 |
|
5187 return 0; |
|
5188 } |
|
5189 |
|
5190 #ifdef CONFIG_PM |
|
5191 static int e1000_suspend(struct pci_dev *pdev, pm_message_t state) |
|
5192 { |
|
5193 int retval; |
|
5194 bool wake; |
|
5195 |
|
5196 retval = __e1000_shutdown(pdev, &wake); |
|
5197 if (retval) |
|
5198 return retval; |
|
5199 |
|
5200 if (wake) { |
|
5201 pci_prepare_to_sleep(pdev); |
|
5202 } else { |
|
5203 pci_wake_from_d3(pdev, false); |
|
5204 pci_set_power_state(pdev, PCI_D3hot); |
|
5205 } |
|
5206 |
|
5207 return 0; |
|
5208 } |
|
5209 |
|
5210 static int e1000_resume(struct pci_dev *pdev) |
|
5211 { |
|
5212 struct net_device *netdev = pci_get_drvdata(pdev); |
|
5213 struct e1000_adapter *adapter = netdev_priv(netdev); |
|
5214 struct e1000_hw *hw = &adapter->hw; |
|
5215 u32 err; |
|
5216 |
|
5217 if (adapter->ecdev) { |
|
5218 return -EBUSY; |
|
5219 } |
|
5220 |
|
5221 pci_set_power_state(pdev, PCI_D0); |
|
5222 pci_restore_state(pdev); |
|
5223 pci_save_state(pdev); |
|
5224 |
|
5225 if (adapter->need_ioport) |
|
5226 err = pci_enable_device(pdev); |
|
5227 else |
|
5228 err = pci_enable_device_mem(pdev); |
|
5229 if (err) { |
|
5230 pr_err("Cannot enable PCI device from suspend\n"); |
|
5231 return err; |
|
5232 } |
|
5233 pci_set_master(pdev); |
|
5234 |
|
5235 pci_enable_wake(pdev, PCI_D3hot, 0); |
|
5236 pci_enable_wake(pdev, PCI_D3cold, 0); |
|
5237 |
|
5238 if (netif_running(netdev)) { |
|
5239 err = e1000_request_irq(adapter); |
|
5240 if (err) |
|
5241 return err; |
|
5242 } |
|
5243 |
|
5244 e1000_power_up_phy(adapter); |
|
5245 e1000_reset(adapter); |
|
5246 ew32(WUS, ~0); |
|
5247 |
|
5248 e1000_init_manageability(adapter); |
|
5249 |
|
5250 if (netif_running(netdev)) |
|
5251 e1000_up(adapter); |
|
5252 |
|
5253 if (!adapter->ecdev) { |
|
5254 netif_device_attach(netdev); |
|
5255 } |
|
5256 |
|
5257 return 0; |
|
5258 } |
|
5259 #endif |
|
5260 |
|
5261 static void e1000_shutdown(struct pci_dev *pdev) |
|
5262 { |
|
5263 bool wake; |
|
5264 |
|
5265 __e1000_shutdown(pdev, &wake); |
|
5266 |
|
5267 if (system_state == SYSTEM_POWER_OFF) { |
|
5268 pci_wake_from_d3(pdev, wake); |
|
5269 pci_set_power_state(pdev, PCI_D3hot); |
|
5270 } |
|
5271 } |
|
5272 |
|
5273 #ifdef CONFIG_NET_POLL_CONTROLLER |
|
5274 /* |
|
5275 * Polling 'interrupt' - used by things like netconsole to send skbs |
|
5276 * without having to re-enable interrupts. It's not called while |
|
5277 * the interrupt routine is executing. |
|
5278 */ |
|
5279 static void e1000_netpoll(struct net_device *netdev) |
|
5280 { |
|
5281 struct e1000_adapter *adapter = netdev_priv(netdev); |
|
5282 |
|
5283 disable_irq(adapter->pdev->irq); |
|
5284 e1000_intr(adapter->pdev->irq, netdev); |
|
5285 enable_irq(adapter->pdev->irq); |
|
5286 } |
|
5287 #endif |
|
5288 |
|
5289 /** |
|
5290 * e1000_io_error_detected - called when PCI error is detected |
|
5291 * @pdev: Pointer to PCI device |
|
5292 * @state: The current pci connection state |
|
5293 * |
|
5294 * This function is called after a PCI bus error affecting |
|
5295 * this device has been detected. |
|
5296 */ |
|
5297 static pci_ers_result_t e1000_io_error_detected(struct pci_dev *pdev, |
|
5298 pci_channel_state_t state) |
|
5299 { |
|
5300 struct net_device *netdev = pci_get_drvdata(pdev); |
|
5301 struct e1000_adapter *adapter = netdev_priv(netdev); |
|
5302 |
|
5303 netif_device_detach(netdev); |
|
5304 |
|
5305 if (state == pci_channel_io_perm_failure) |
|
5306 return PCI_ERS_RESULT_DISCONNECT; |
|
5307 |
|
5308 if (netif_running(netdev)) |
|
5309 e1000_down(adapter); |
|
5310 pci_disable_device(pdev); |
|
5311 |
|
5312 /* Request a slot slot reset. */ |
|
5313 return PCI_ERS_RESULT_NEED_RESET; |
|
5314 } |
|
5315 |
|
5316 /** |
|
5317 * e1000_io_slot_reset - called after the pci bus has been reset. |
|
5318 * @pdev: Pointer to PCI device |
|
5319 * |
|
5320 * Restart the card from scratch, as if from a cold-boot. Implementation |
|
5321 * resembles the first-half of the e1000_resume routine. |
|
5322 */ |
|
5323 static pci_ers_result_t e1000_io_slot_reset(struct pci_dev *pdev) |
|
5324 { |
|
5325 struct net_device *netdev = pci_get_drvdata(pdev); |
|
5326 struct e1000_adapter *adapter = netdev_priv(netdev); |
|
5327 struct e1000_hw *hw = &adapter->hw; |
|
5328 int err; |
|
5329 |
|
5330 if (adapter->need_ioport) |
|
5331 err = pci_enable_device(pdev); |
|
5332 else |
|
5333 err = pci_enable_device_mem(pdev); |
|
5334 if (err) { |
|
5335 pr_err("Cannot re-enable PCI device after reset.\n"); |
|
5336 return PCI_ERS_RESULT_DISCONNECT; |
|
5337 } |
|
5338 pci_set_master(pdev); |
|
5339 |
|
5340 pci_enable_wake(pdev, PCI_D3hot, 0); |
|
5341 pci_enable_wake(pdev, PCI_D3cold, 0); |
|
5342 |
|
5343 e1000_reset(adapter); |
|
5344 ew32(WUS, ~0); |
|
5345 |
|
5346 return PCI_ERS_RESULT_RECOVERED; |
|
5347 } |
|
5348 |
|
5349 /** |
|
5350 * e1000_io_resume - called when traffic can start flowing again. |
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5351 * @pdev: Pointer to PCI device |
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5352 * |
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5353 * This callback is called when the error recovery driver tells us that |
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5354 * its OK to resume normal operation. Implementation resembles the |
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5355 * second-half of the e1000_resume routine. |
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5356 */ |
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5357 static void e1000_io_resume(struct pci_dev *pdev) |
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5358 { |
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5359 struct net_device *netdev = pci_get_drvdata(pdev); |
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5360 struct e1000_adapter *adapter = netdev_priv(netdev); |
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5361 |
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5362 e1000_init_manageability(adapter); |
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5363 |
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5364 if (netif_running(netdev)) { |
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5365 if (e1000_up(adapter)) { |
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5366 pr_info("can't bring device back up after reset\n"); |
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5367 return; |
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5368 } |
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5369 } |
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5370 |
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5371 netif_device_attach(netdev); |
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5372 } |
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5373 |
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5374 /* e1000_main.c */ |