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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 "e1000-3.16-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 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, |
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174 __be16 proto, u16 vid); |
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175 static int e1000_vlan_rx_kill_vid(struct net_device *netdev, |
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176 __be16 proto, u16 vid); |
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177 static void e1000_restore_vlan(struct e1000_adapter *adapter); |
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178 |
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179 #ifdef CONFIG_PM |
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180 static int e1000_suspend(struct pci_dev *pdev, pm_message_t state); |
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181 static int e1000_resume(struct pci_dev *pdev); |
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182 #endif |
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183 static void e1000_shutdown(struct pci_dev *pdev); |
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184 |
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185 #ifdef CONFIG_NET_POLL_CONTROLLER |
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186 /* for netdump / net console */ |
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187 static void e1000_netpoll (struct net_device *netdev); |
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188 #endif |
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189 |
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190 #define COPYBREAK_DEFAULT 256 |
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191 static unsigned int copybreak __read_mostly = COPYBREAK_DEFAULT; |
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192 module_param(copybreak, uint, 0644); |
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193 MODULE_PARM_DESC(copybreak, |
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194 "Maximum size of packet that is copied to a new buffer on receive"); |
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195 |
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196 static pci_ers_result_t e1000_io_error_detected(struct pci_dev *pdev, |
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197 pci_channel_state_t state); |
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198 static pci_ers_result_t e1000_io_slot_reset(struct pci_dev *pdev); |
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199 static void e1000_io_resume(struct pci_dev *pdev); |
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200 |
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201 static const struct pci_error_handlers e1000_err_handler = { |
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202 .error_detected = e1000_io_error_detected, |
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203 .slot_reset = e1000_io_slot_reset, |
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204 .resume = e1000_io_resume, |
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205 }; |
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206 |
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207 static struct pci_driver e1000_driver = { |
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208 .name = e1000_driver_name, |
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209 .id_table = e1000_pci_tbl, |
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210 .probe = e1000_probe, |
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211 .remove = e1000_remove, |
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212 #ifdef CONFIG_PM |
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213 /* Power Management Hooks */ |
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214 .suspend = e1000_suspend, |
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215 .resume = e1000_resume, |
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216 #endif |
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217 .shutdown = e1000_shutdown, |
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218 .err_handler = &e1000_err_handler |
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219 }; |
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220 |
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221 MODULE_AUTHOR("Florian Pose <fp@igh-essen.com>"); |
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222 MODULE_DESCRIPTION("EtherCAT-capable Intel(R) PRO/1000 Network Driver"); |
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223 MODULE_LICENSE("GPL"); |
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224 MODULE_VERSION(DRV_VERSION); |
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225 |
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226 #define DEFAULT_MSG_ENABLE (NETIF_MSG_DRV|NETIF_MSG_PROBE|NETIF_MSG_LINK) |
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227 static int debug = -1; |
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228 module_param(debug, int, 0); |
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229 MODULE_PARM_DESC(debug, "Debug level (0=none,...,16=all)"); |
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230 |
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231 /** |
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232 * e1000_get_hw_dev - return device |
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233 * used by hardware layer to print debugging information |
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234 * |
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235 **/ |
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236 struct net_device *e1000_get_hw_dev(struct e1000_hw *hw) |
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237 { |
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238 struct e1000_adapter *adapter = hw->back; |
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239 return adapter->netdev; |
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240 } |
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241 |
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242 /** |
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243 * e1000_init_module - Driver Registration Routine |
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244 * |
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245 * e1000_init_module is the first routine called when the driver is |
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246 * loaded. All it does is register with the PCI subsystem. |
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247 **/ |
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248 static int __init e1000_init_module(void) |
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249 { |
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250 int ret; |
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251 pr_info("%s - version %s\n", e1000_driver_string, e1000_driver_version); |
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252 |
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253 pr_info("%s\n", e1000_copyright); |
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254 |
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255 ret = pci_register_driver(&e1000_driver); |
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256 if (copybreak != COPYBREAK_DEFAULT) { |
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257 if (copybreak == 0) |
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258 pr_info("copybreak disabled\n"); |
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259 else |
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260 pr_info("copybreak enabled for " |
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261 "packets <= %u bytes\n", copybreak); |
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262 } |
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263 return ret; |
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264 } |
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265 |
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266 module_init(e1000_init_module); |
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267 |
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268 /** |
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269 * e1000_exit_module - Driver Exit Cleanup Routine |
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270 * |
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271 * e1000_exit_module is called just before the driver is removed |
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272 * from memory. |
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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 static void e1000_irq_disable(struct e1000_adapter *adapter) |
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317 { |
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318 struct e1000_hw *hw = &adapter->hw; |
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319 |
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320 if (adapter->ecdev) { |
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321 return; |
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322 } |
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323 |
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324 ew32(IMC, ~0); |
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325 E1000_WRITE_FLUSH(); |
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326 synchronize_irq(adapter->pdev->irq); |
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327 } |
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328 |
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329 /** |
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330 * e1000_irq_enable - Enable default interrupt generation settings |
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331 * @adapter: board private structure |
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332 **/ |
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333 static void e1000_irq_enable(struct e1000_adapter *adapter) |
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334 { |
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335 struct e1000_hw *hw = &adapter->hw; |
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336 |
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337 if (adapter->ecdev) { |
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338 return; |
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339 } |
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340 |
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341 ew32(IMS, IMS_ENABLE_MASK); |
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342 E1000_WRITE_FLUSH(); |
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343 } |
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344 |
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345 static void e1000_update_mng_vlan(struct e1000_adapter *adapter) |
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346 { |
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347 struct e1000_hw *hw = &adapter->hw; |
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348 struct net_device *netdev = adapter->netdev; |
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349 u16 vid = hw->mng_cookie.vlan_id; |
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350 u16 old_vid = adapter->mng_vlan_id; |
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351 |
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352 if (!e1000_vlan_used(adapter)) |
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353 return; |
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354 |
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355 if (!test_bit(vid, adapter->active_vlans)) { |
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356 if (hw->mng_cookie.status & |
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357 E1000_MNG_DHCP_COOKIE_STATUS_VLAN_SUPPORT) { |
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358 e1000_vlan_rx_add_vid(netdev, htons(ETH_P_8021Q), vid); |
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359 adapter->mng_vlan_id = vid; |
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360 } else { |
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361 adapter->mng_vlan_id = E1000_MNG_VLAN_NONE; |
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362 } |
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363 if ((old_vid != (u16)E1000_MNG_VLAN_NONE) && |
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364 (vid != old_vid) && |
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365 !test_bit(old_vid, adapter->active_vlans)) |
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366 e1000_vlan_rx_kill_vid(netdev, htons(ETH_P_8021Q), |
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367 old_vid); |
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368 } else { |
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369 adapter->mng_vlan_id = vid; |
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370 } |
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371 } |
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372 |
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373 static void e1000_init_manageability(struct e1000_adapter *adapter) |
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374 { |
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375 struct e1000_hw *hw = &adapter->hw; |
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376 |
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377 if (adapter->en_mng_pt) { |
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378 u32 manc = er32(MANC); |
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379 |
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380 /* disable hardware interception of ARP */ |
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381 manc &= ~(E1000_MANC_ARP_EN); |
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382 |
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383 ew32(MANC, manc); |
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384 } |
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385 } |
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386 |
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387 static void e1000_release_manageability(struct e1000_adapter *adapter) |
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388 { |
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389 struct e1000_hw *hw = &adapter->hw; |
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390 |
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391 if (adapter->en_mng_pt) { |
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392 u32 manc = er32(MANC); |
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393 |
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394 /* re-enable hardware interception of ARP */ |
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395 manc |= E1000_MANC_ARP_EN; |
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396 |
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397 ew32(MANC, manc); |
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398 } |
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399 } |
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400 |
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401 /** |
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402 * e1000_configure - configure the hardware for RX and TX |
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403 * @adapter = private board structure |
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404 **/ |
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405 static void e1000_configure(struct e1000_adapter *adapter) |
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406 { |
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407 struct net_device *netdev = adapter->netdev; |
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408 int i; |
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409 |
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410 e1000_set_rx_mode(netdev); |
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411 |
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412 e1000_restore_vlan(adapter); |
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413 e1000_init_manageability(adapter); |
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414 |
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415 e1000_configure_tx(adapter); |
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416 e1000_setup_rctl(adapter); |
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417 e1000_configure_rx(adapter); |
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418 /* call E1000_DESC_UNUSED which always leaves |
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419 * at least 1 descriptor unused to make sure |
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420 * next_to_use != next_to_clean |
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421 */ |
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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 void e1000_power_up_phy(struct e1000_adapter *adapter) |
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466 { |
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467 struct e1000_hw *hw = &adapter->hw; |
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468 u16 mii_reg = 0; |
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469 |
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470 /* Just clear the power down bit to wake the phy back up */ |
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471 if (hw->media_type == e1000_media_type_copper) { |
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472 /* according to the manual, the phy will retain its |
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473 * settings across a power-down/up cycle |
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474 */ |
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475 e1000_read_phy_reg(hw, PHY_CTRL, &mii_reg); |
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476 mii_reg &= ~MII_CR_POWER_DOWN; |
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477 e1000_write_phy_reg(hw, PHY_CTRL, mii_reg); |
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478 } |
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479 } |
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480 |
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481 static void e1000_power_down_phy(struct e1000_adapter *adapter) |
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482 { |
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483 struct e1000_hw *hw = &adapter->hw; |
|
484 |
|
485 /* Power down the PHY so no link is implied when interface is down * |
|
486 * The PHY cannot be powered down if any of the following is true * |
|
487 * (a) WoL is enabled |
|
488 * (b) AMT is active |
|
489 * (c) SoL/IDER session is active |
|
490 */ |
|
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 if (!adapter->ecdev) { |
|
526 cancel_delayed_work_sync(&adapter->watchdog_task); |
|
527 } |
|
528 |
|
529 /* |
|
530 * Since the watchdog task can reschedule other tasks, we should cancel |
|
531 * it first, otherwise we can run into the situation when a work is |
|
532 * still running after the adapter has been turned down. |
|
533 */ |
|
534 |
|
535 if (!adapter->ecdev) { |
|
536 cancel_delayed_work_sync(&adapter->phy_info_task); |
|
537 cancel_delayed_work_sync(&adapter->fifo_stall_task); |
|
538 } |
|
539 |
|
540 /* Only kill reset task if adapter is not resetting */ |
|
541 if (!adapter->ecdev && !test_bit(__E1000_RESETTING, &adapter->flags)) |
|
542 cancel_work_sync(&adapter->reset_task); |
|
543 } |
|
544 |
|
545 void e1000_down(struct e1000_adapter *adapter) |
|
546 { |
|
547 struct e1000_hw *hw = &adapter->hw; |
|
548 struct net_device *netdev = adapter->netdev; |
|
549 u32 rctl, tctl; |
|
550 |
|
551 |
|
552 /* disable receives in the hardware */ |
|
553 rctl = er32(RCTL); |
|
554 ew32(RCTL, rctl & ~E1000_RCTL_EN); |
|
555 |
|
556 if (!adapter->ecdev) { |
|
557 /* flush and sleep below */ |
|
558 netif_tx_disable(netdev); |
|
559 } |
|
560 |
|
561 /* disable transmits in the hardware */ |
|
562 tctl = er32(TCTL); |
|
563 tctl &= ~E1000_TCTL_EN; |
|
564 ew32(TCTL, tctl); |
|
565 /* flush both disables and wait for them to finish */ |
|
566 E1000_WRITE_FLUSH(); |
|
567 msleep(10); |
|
568 |
|
569 if (!adapter->ecdev) { |
|
570 napi_disable(&adapter->napi); |
|
571 |
|
572 e1000_irq_disable(adapter); |
|
573 } |
|
574 |
|
575 /* Setting DOWN must be after irq_disable to prevent |
|
576 * a screaming interrupt. Setting DOWN also prevents |
|
577 * tasks from rescheduling. |
|
578 */ |
|
579 e1000_down_and_stop(adapter); |
|
580 |
|
581 adapter->link_speed = 0; |
|
582 adapter->link_duplex = 0; |
|
583 |
|
584 if (!adapter->ecdev) { |
|
585 netif_carrier_off(netdev); |
|
586 } |
|
587 |
|
588 e1000_reset(adapter); |
|
589 e1000_clean_all_tx_rings(adapter); |
|
590 e1000_clean_all_rx_rings(adapter); |
|
591 } |
|
592 |
|
593 void e1000_reinit_locked(struct e1000_adapter *adapter) |
|
594 { |
|
595 WARN_ON(in_interrupt()); |
|
596 while (test_and_set_bit(__E1000_RESETTING, &adapter->flags)) |
|
597 msleep(1); |
|
598 e1000_down(adapter); |
|
599 e1000_up(adapter); |
|
600 clear_bit(__E1000_RESETTING, &adapter->flags); |
|
601 } |
|
602 |
|
603 void e1000_reset(struct e1000_adapter *adapter) |
|
604 { |
|
605 struct e1000_hw *hw = &adapter->hw; |
|
606 u32 pba = 0, tx_space, min_tx_space, min_rx_space; |
|
607 bool legacy_pba_adjust = false; |
|
608 u16 hwm; |
|
609 |
|
610 /* Repartition Pba for greater than 9k mtu |
|
611 * To take effect CTRL.RST is required. |
|
612 */ |
|
613 |
|
614 switch (hw->mac_type) { |
|
615 case e1000_82542_rev2_0: |
|
616 case e1000_82542_rev2_1: |
|
617 case e1000_82543: |
|
618 case e1000_82544: |
|
619 case e1000_82540: |
|
620 case e1000_82541: |
|
621 case e1000_82541_rev_2: |
|
622 legacy_pba_adjust = true; |
|
623 pba = E1000_PBA_48K; |
|
624 break; |
|
625 case e1000_82545: |
|
626 case e1000_82545_rev_3: |
|
627 case e1000_82546: |
|
628 case e1000_ce4100: |
|
629 case e1000_82546_rev_3: |
|
630 pba = E1000_PBA_48K; |
|
631 break; |
|
632 case e1000_82547: |
|
633 case e1000_82547_rev_2: |
|
634 legacy_pba_adjust = true; |
|
635 pba = E1000_PBA_30K; |
|
636 break; |
|
637 case e1000_undefined: |
|
638 case e1000_num_macs: |
|
639 break; |
|
640 } |
|
641 |
|
642 if (legacy_pba_adjust) { |
|
643 if (hw->max_frame_size > E1000_RXBUFFER_8192) |
|
644 pba -= 8; /* allocate more FIFO for Tx */ |
|
645 |
|
646 if (hw->mac_type == e1000_82547) { |
|
647 adapter->tx_fifo_head = 0; |
|
648 adapter->tx_head_addr = pba << E1000_TX_HEAD_ADDR_SHIFT; |
|
649 adapter->tx_fifo_size = |
|
650 (E1000_PBA_40K - pba) << E1000_PBA_BYTES_SHIFT; |
|
651 atomic_set(&adapter->tx_fifo_stall, 0); |
|
652 } |
|
653 } else if (hw->max_frame_size > ETH_FRAME_LEN + ETH_FCS_LEN) { |
|
654 /* adjust PBA for jumbo frames */ |
|
655 ew32(PBA, pba); |
|
656 |
|
657 /* To maintain wire speed transmits, the Tx FIFO should be |
|
658 * large enough to accommodate two full transmit packets, |
|
659 * rounded up to the next 1KB and expressed in KB. Likewise, |
|
660 * the Rx FIFO should be large enough to accommodate at least |
|
661 * one full receive packet and is similarly rounded up and |
|
662 * expressed in KB. |
|
663 */ |
|
664 pba = er32(PBA); |
|
665 /* upper 16 bits has Tx packet buffer allocation size in KB */ |
|
666 tx_space = pba >> 16; |
|
667 /* lower 16 bits has Rx packet buffer allocation size in KB */ |
|
668 pba &= 0xffff; |
|
669 /* the Tx fifo also stores 16 bytes of information about the Tx |
|
670 * but don't include ethernet FCS because hardware appends it |
|
671 */ |
|
672 min_tx_space = (hw->max_frame_size + |
|
673 sizeof(struct e1000_tx_desc) - |
|
674 ETH_FCS_LEN) * 2; |
|
675 min_tx_space = ALIGN(min_tx_space, 1024); |
|
676 min_tx_space >>= 10; |
|
677 /* software strips receive CRC, so leave room for it */ |
|
678 min_rx_space = hw->max_frame_size; |
|
679 min_rx_space = ALIGN(min_rx_space, 1024); |
|
680 min_rx_space >>= 10; |
|
681 |
|
682 /* If current Tx allocation is less than the min Tx FIFO size, |
|
683 * and the min Tx FIFO size is less than the current Rx FIFO |
|
684 * allocation, take space away from current Rx allocation |
|
685 */ |
|
686 if (tx_space < min_tx_space && |
|
687 ((min_tx_space - tx_space) < pba)) { |
|
688 pba = pba - (min_tx_space - tx_space); |
|
689 |
|
690 /* PCI/PCIx hardware has PBA alignment constraints */ |
|
691 switch (hw->mac_type) { |
|
692 case e1000_82545 ... e1000_82546_rev_3: |
|
693 pba &= ~(E1000_PBA_8K - 1); |
|
694 break; |
|
695 default: |
|
696 break; |
|
697 } |
|
698 |
|
699 /* if short on Rx space, Rx wins and must trump Tx |
|
700 * adjustment or use Early Receive if available |
|
701 */ |
|
702 if (pba < min_rx_space) |
|
703 pba = min_rx_space; |
|
704 } |
|
705 } |
|
706 |
|
707 ew32(PBA, pba); |
|
708 |
|
709 /* flow control settings: |
|
710 * The high water mark must be low enough to fit one full frame |
|
711 * (or the size used for early receive) above it in the Rx FIFO. |
|
712 * Set it to the lower of: |
|
713 * - 90% of the Rx FIFO size, and |
|
714 * - the full Rx FIFO size minus the early receive size (for parts |
|
715 * with ERT support assuming ERT set to E1000_ERT_2048), or |
|
716 * - the full Rx FIFO size minus one full frame |
|
717 */ |
|
718 hwm = min(((pba << 10) * 9 / 10), |
|
719 ((pba << 10) - hw->max_frame_size)); |
|
720 |
|
721 hw->fc_high_water = hwm & 0xFFF8; /* 8-byte granularity */ |
|
722 hw->fc_low_water = hw->fc_high_water - 8; |
|
723 hw->fc_pause_time = E1000_FC_PAUSE_TIME; |
|
724 hw->fc_send_xon = 1; |
|
725 hw->fc = hw->original_fc; |
|
726 |
|
727 /* Allow time for pending master requests to run */ |
|
728 e1000_reset_hw(hw); |
|
729 if (hw->mac_type >= e1000_82544) |
|
730 ew32(WUC, 0); |
|
731 |
|
732 if (e1000_init_hw(hw)) |
|
733 e_dev_err("Hardware Error\n"); |
|
734 e1000_update_mng_vlan(adapter); |
|
735 |
|
736 /* if (adapter->hwflags & HWFLAGS_PHY_PWR_BIT) { */ |
|
737 if (hw->mac_type >= e1000_82544 && |
|
738 hw->autoneg == 1 && |
|
739 hw->autoneg_advertised == ADVERTISE_1000_FULL) { |
|
740 u32 ctrl = er32(CTRL); |
|
741 /* clear phy power management bit if we are in gig only mode, |
|
742 * which if enabled will attempt negotiation to 100Mb, which |
|
743 * can cause a loss of link at power off or driver unload |
|
744 */ |
|
745 ctrl &= ~E1000_CTRL_SWDPIN3; |
|
746 ew32(CTRL, ctrl); |
|
747 } |
|
748 |
|
749 /* Enable h/w to recognize an 802.1Q VLAN Ethernet packet */ |
|
750 ew32(VET, ETHERNET_IEEE_VLAN_TYPE); |
|
751 |
|
752 e1000_reset_adaptive(hw); |
|
753 e1000_phy_get_info(hw, &adapter->phy_info); |
|
754 |
|
755 e1000_release_manageability(adapter); |
|
756 } |
|
757 |
|
758 /* Dump the eeprom for users having checksum issues */ |
|
759 static void e1000_dump_eeprom(struct e1000_adapter *adapter) |
|
760 { |
|
761 struct net_device *netdev = adapter->netdev; |
|
762 struct ethtool_eeprom eeprom; |
|
763 const struct ethtool_ops *ops = netdev->ethtool_ops; |
|
764 u8 *data; |
|
765 int i; |
|
766 u16 csum_old, csum_new = 0; |
|
767 |
|
768 eeprom.len = ops->get_eeprom_len(netdev); |
|
769 eeprom.offset = 0; |
|
770 |
|
771 data = kmalloc(eeprom.len, GFP_KERNEL); |
|
772 if (!data) |
|
773 return; |
|
774 |
|
775 ops->get_eeprom(netdev, &eeprom, data); |
|
776 |
|
777 csum_old = (data[EEPROM_CHECKSUM_REG * 2]) + |
|
778 (data[EEPROM_CHECKSUM_REG * 2 + 1] << 8); |
|
779 for (i = 0; i < EEPROM_CHECKSUM_REG * 2; i += 2) |
|
780 csum_new += data[i] + (data[i + 1] << 8); |
|
781 csum_new = EEPROM_SUM - csum_new; |
|
782 |
|
783 pr_err("/*********************/\n"); |
|
784 pr_err("Current EEPROM Checksum : 0x%04x\n", csum_old); |
|
785 pr_err("Calculated : 0x%04x\n", csum_new); |
|
786 |
|
787 pr_err("Offset Values\n"); |
|
788 pr_err("======== ======\n"); |
|
789 print_hex_dump(KERN_ERR, "", DUMP_PREFIX_OFFSET, 16, 1, data, 128, 0); |
|
790 |
|
791 pr_err("Include this output when contacting your support provider.\n"); |
|
792 pr_err("This is not a software error! Something bad happened to\n"); |
|
793 pr_err("your hardware or EEPROM image. Ignoring this problem could\n"); |
|
794 pr_err("result in further problems, possibly loss of data,\n"); |
|
795 pr_err("corruption or system hangs!\n"); |
|
796 pr_err("The MAC Address will be reset to 00:00:00:00:00:00,\n"); |
|
797 pr_err("which is invalid and requires you to set the proper MAC\n"); |
|
798 pr_err("address manually before continuing to enable this network\n"); |
|
799 pr_err("device. Please inspect the EEPROM dump and report the\n"); |
|
800 pr_err("issue to your hardware vendor or Intel Customer Support.\n"); |
|
801 pr_err("/*********************/\n"); |
|
802 |
|
803 kfree(data); |
|
804 } |
|
805 |
|
806 /** |
|
807 * e1000_is_need_ioport - determine if an adapter needs ioport resources or not |
|
808 * @pdev: PCI device information struct |
|
809 * |
|
810 * Return true if an adapter needs ioport resources |
|
811 **/ |
|
812 static int e1000_is_need_ioport(struct pci_dev *pdev) |
|
813 { |
|
814 switch (pdev->device) { |
|
815 case E1000_DEV_ID_82540EM: |
|
816 case E1000_DEV_ID_82540EM_LOM: |
|
817 case E1000_DEV_ID_82540EP: |
|
818 case E1000_DEV_ID_82540EP_LOM: |
|
819 case E1000_DEV_ID_82540EP_LP: |
|
820 case E1000_DEV_ID_82541EI: |
|
821 case E1000_DEV_ID_82541EI_MOBILE: |
|
822 case E1000_DEV_ID_82541ER: |
|
823 case E1000_DEV_ID_82541ER_LOM: |
|
824 case E1000_DEV_ID_82541GI: |
|
825 case E1000_DEV_ID_82541GI_LF: |
|
826 case E1000_DEV_ID_82541GI_MOBILE: |
|
827 case E1000_DEV_ID_82544EI_COPPER: |
|
828 case E1000_DEV_ID_82544EI_FIBER: |
|
829 case E1000_DEV_ID_82544GC_COPPER: |
|
830 case E1000_DEV_ID_82544GC_LOM: |
|
831 case E1000_DEV_ID_82545EM_COPPER: |
|
832 case E1000_DEV_ID_82545EM_FIBER: |
|
833 case E1000_DEV_ID_82546EB_COPPER: |
|
834 case E1000_DEV_ID_82546EB_FIBER: |
|
835 case E1000_DEV_ID_82546EB_QUAD_COPPER: |
|
836 return true; |
|
837 default: |
|
838 return false; |
|
839 } |
|
840 } |
|
841 |
|
842 static netdev_features_t e1000_fix_features(struct net_device *netdev, |
|
843 netdev_features_t features) |
|
844 { |
|
845 /* Since there is no support for separate Rx/Tx vlan accel |
|
846 * enable/disable make sure Tx flag is always in same state as Rx. |
|
847 */ |
|
848 if (features & NETIF_F_HW_VLAN_CTAG_RX) |
|
849 features |= NETIF_F_HW_VLAN_CTAG_TX; |
|
850 else |
|
851 features &= ~NETIF_F_HW_VLAN_CTAG_TX; |
|
852 |
|
853 return features; |
|
854 } |
|
855 |
|
856 static int e1000_set_features(struct net_device *netdev, |
|
857 netdev_features_t features) |
|
858 { |
|
859 struct e1000_adapter *adapter = netdev_priv(netdev); |
|
860 netdev_features_t changed = features ^ netdev->features; |
|
861 |
|
862 if (changed & NETIF_F_HW_VLAN_CTAG_RX) |
|
863 e1000_vlan_mode(netdev, features); |
|
864 |
|
865 if (!(changed & (NETIF_F_RXCSUM | NETIF_F_RXALL))) |
|
866 return 0; |
|
867 |
|
868 netdev->features = features; |
|
869 adapter->rx_csum = !!(features & NETIF_F_RXCSUM); |
|
870 |
|
871 if (netif_running(netdev)) |
|
872 e1000_reinit_locked(adapter); |
|
873 else |
|
874 e1000_reset(adapter); |
|
875 |
|
876 return 0; |
|
877 } |
|
878 |
|
879 static const struct net_device_ops e1000_netdev_ops = { |
|
880 .ndo_open = e1000_open, |
|
881 .ndo_stop = e1000_close, |
|
882 .ndo_start_xmit = e1000_xmit_frame, |
|
883 .ndo_get_stats = e1000_get_stats, |
|
884 .ndo_set_rx_mode = e1000_set_rx_mode, |
|
885 .ndo_set_mac_address = e1000_set_mac, |
|
886 .ndo_tx_timeout = e1000_tx_timeout, |
|
887 .ndo_change_mtu = e1000_change_mtu, |
|
888 .ndo_do_ioctl = e1000_ioctl, |
|
889 .ndo_validate_addr = eth_validate_addr, |
|
890 .ndo_vlan_rx_add_vid = e1000_vlan_rx_add_vid, |
|
891 .ndo_vlan_rx_kill_vid = e1000_vlan_rx_kill_vid, |
|
892 #ifdef CONFIG_NET_POLL_CONTROLLER |
|
893 .ndo_poll_controller = e1000_netpoll, |
|
894 #endif |
|
895 .ndo_fix_features = e1000_fix_features, |
|
896 .ndo_set_features = e1000_set_features, |
|
897 }; |
|
898 |
|
899 /** |
|
900 * e1000_init_hw_struct - initialize members of hw struct |
|
901 * @adapter: board private struct |
|
902 * @hw: structure used by e1000_hw.c |
|
903 * |
|
904 * Factors out initialization of the e1000_hw struct to its own function |
|
905 * that can be called very early at init (just after struct allocation). |
|
906 * Fields are initialized based on PCI device information and |
|
907 * OS network device settings (MTU size). |
|
908 * Returns negative error codes if MAC type setup fails. |
|
909 */ |
|
910 static int e1000_init_hw_struct(struct e1000_adapter *adapter, |
|
911 struct e1000_hw *hw) |
|
912 { |
|
913 struct pci_dev *pdev = adapter->pdev; |
|
914 |
|
915 /* PCI config space info */ |
|
916 hw->vendor_id = pdev->vendor; |
|
917 hw->device_id = pdev->device; |
|
918 hw->subsystem_vendor_id = pdev->subsystem_vendor; |
|
919 hw->subsystem_id = pdev->subsystem_device; |
|
920 hw->revision_id = pdev->revision; |
|
921 |
|
922 pci_read_config_word(pdev, PCI_COMMAND, &hw->pci_cmd_word); |
|
923 |
|
924 hw->max_frame_size = adapter->netdev->mtu + |
|
925 ENET_HEADER_SIZE + ETHERNET_FCS_SIZE; |
|
926 hw->min_frame_size = MINIMUM_ETHERNET_FRAME_SIZE; |
|
927 |
|
928 /* identify the MAC */ |
|
929 if (e1000_set_mac_type(hw)) { |
|
930 e_err(probe, "Unknown MAC Type\n"); |
|
931 return -EIO; |
|
932 } |
|
933 |
|
934 switch (hw->mac_type) { |
|
935 default: |
|
936 break; |
|
937 case e1000_82541: |
|
938 case e1000_82547: |
|
939 case e1000_82541_rev_2: |
|
940 case e1000_82547_rev_2: |
|
941 hw->phy_init_script = 1; |
|
942 break; |
|
943 } |
|
944 |
|
945 e1000_set_media_type(hw); |
|
946 e1000_get_bus_info(hw); |
|
947 |
|
948 hw->wait_autoneg_complete = false; |
|
949 hw->tbi_compatibility_en = true; |
|
950 hw->adaptive_ifs = true; |
|
951 |
|
952 /* Copper options */ |
|
953 |
|
954 if (hw->media_type == e1000_media_type_copper) { |
|
955 hw->mdix = AUTO_ALL_MODES; |
|
956 hw->disable_polarity_correction = false; |
|
957 hw->master_slave = E1000_MASTER_SLAVE; |
|
958 } |
|
959 |
|
960 return 0; |
|
961 } |
|
962 |
|
963 /** |
|
964 * e1000_probe - Device Initialization Routine |
|
965 * @pdev: PCI device information struct |
|
966 * @ent: entry in e1000_pci_tbl |
|
967 * |
|
968 * Returns 0 on success, negative on failure |
|
969 * |
|
970 * e1000_probe initializes an adapter identified by a pci_dev structure. |
|
971 * The OS initialization, configuring of the adapter private structure, |
|
972 * and a hardware reset occur. |
|
973 **/ |
|
974 static int e1000_probe(struct pci_dev *pdev, const struct pci_device_id *ent) |
|
975 { |
|
976 struct net_device *netdev; |
|
977 struct e1000_adapter *adapter; |
|
978 struct e1000_hw *hw; |
|
979 |
|
980 static int cards_found = 0; |
|
981 static int global_quad_port_a = 0; /* global ksp3 port a indication */ |
|
982 int i, err, pci_using_dac; |
|
983 u16 eeprom_data = 0; |
|
984 u16 tmp = 0; |
|
985 u16 eeprom_apme_mask = E1000_EEPROM_APME; |
|
986 int bars, need_ioport; |
|
987 |
|
988 /* do not allocate ioport bars when not needed */ |
|
989 need_ioport = e1000_is_need_ioport(pdev); |
|
990 if (need_ioport) { |
|
991 bars = pci_select_bars(pdev, IORESOURCE_MEM | IORESOURCE_IO); |
|
992 err = pci_enable_device(pdev); |
|
993 } else { |
|
994 bars = pci_select_bars(pdev, IORESOURCE_MEM); |
|
995 err = pci_enable_device_mem(pdev); |
|
996 } |
|
997 if (err) |
|
998 return err; |
|
999 |
|
1000 err = pci_request_selected_regions(pdev, bars, e1000_driver_name); |
|
1001 if (err) |
|
1002 goto err_pci_reg; |
|
1003 |
|
1004 pci_set_master(pdev); |
|
1005 err = pci_save_state(pdev); |
|
1006 if (err) |
|
1007 goto err_alloc_etherdev; |
|
1008 |
|
1009 err = -ENOMEM; |
|
1010 netdev = alloc_etherdev(sizeof(struct e1000_adapter)); |
|
1011 if (!netdev) |
|
1012 goto err_alloc_etherdev; |
|
1013 |
|
1014 SET_NETDEV_DEV(netdev, &pdev->dev); |
|
1015 |
|
1016 pci_set_drvdata(pdev, netdev); |
|
1017 adapter = netdev_priv(netdev); |
|
1018 adapter->netdev = netdev; |
|
1019 adapter->pdev = pdev; |
|
1020 adapter->msg_enable = netif_msg_init(debug, DEFAULT_MSG_ENABLE); |
|
1021 adapter->bars = bars; |
|
1022 adapter->need_ioport = need_ioport; |
|
1023 |
|
1024 hw = &adapter->hw; |
|
1025 hw->back = adapter; |
|
1026 |
|
1027 err = -EIO; |
|
1028 hw->hw_addr = pci_ioremap_bar(pdev, BAR_0); |
|
1029 if (!hw->hw_addr) |
|
1030 goto err_ioremap; |
|
1031 |
|
1032 if (adapter->need_ioport) { |
|
1033 for (i = BAR_1; i <= BAR_5; i++) { |
|
1034 if (pci_resource_len(pdev, i) == 0) |
|
1035 continue; |
|
1036 if (pci_resource_flags(pdev, i) & IORESOURCE_IO) { |
|
1037 hw->io_base = pci_resource_start(pdev, i); |
|
1038 break; |
|
1039 } |
|
1040 } |
|
1041 } |
|
1042 |
|
1043 /* make ready for any if (hw->...) below */ |
|
1044 err = e1000_init_hw_struct(adapter, hw); |
|
1045 if (err) |
|
1046 goto err_sw_init; |
|
1047 |
|
1048 /* there is a workaround being applied below that limits |
|
1049 * 64-bit DMA addresses to 64-bit hardware. There are some |
|
1050 * 32-bit adapters that Tx hang when given 64-bit DMA addresses |
|
1051 */ |
|
1052 pci_using_dac = 0; |
|
1053 if ((hw->bus_type == e1000_bus_type_pcix) && |
|
1054 !dma_set_mask_and_coherent(&pdev->dev, DMA_BIT_MASK(64))) { |
|
1055 pci_using_dac = 1; |
|
1056 } else { |
|
1057 err = dma_set_mask_and_coherent(&pdev->dev, DMA_BIT_MASK(32)); |
|
1058 if (err) { |
|
1059 pr_err("No usable DMA config, aborting\n"); |
|
1060 goto err_dma; |
|
1061 } |
|
1062 } |
|
1063 |
|
1064 netdev->netdev_ops = &e1000_netdev_ops; |
|
1065 e1000_set_ethtool_ops(netdev); |
|
1066 netdev->watchdog_timeo = 5 * HZ; |
|
1067 netif_napi_add(netdev, &adapter->napi, e1000_clean, 64); |
|
1068 |
|
1069 strncpy(netdev->name, pci_name(pdev), sizeof(netdev->name) - 1); |
|
1070 |
|
1071 adapter->bd_number = cards_found; |
|
1072 |
|
1073 /* setup the private structure */ |
|
1074 |
|
1075 err = e1000_sw_init(adapter); |
|
1076 if (err) |
|
1077 goto err_sw_init; |
|
1078 |
|
1079 err = -EIO; |
|
1080 if (hw->mac_type == e1000_ce4100) { |
|
1081 hw->ce4100_gbe_mdio_base_virt = |
|
1082 ioremap(pci_resource_start(pdev, BAR_1), |
|
1083 pci_resource_len(pdev, BAR_1)); |
|
1084 |
|
1085 if (!hw->ce4100_gbe_mdio_base_virt) |
|
1086 goto err_mdio_ioremap; |
|
1087 } |
|
1088 |
|
1089 if (hw->mac_type >= e1000_82543) { |
|
1090 netdev->hw_features = NETIF_F_SG | |
|
1091 NETIF_F_HW_CSUM | |
|
1092 NETIF_F_HW_VLAN_CTAG_RX; |
|
1093 netdev->features = NETIF_F_HW_VLAN_CTAG_TX | |
|
1094 NETIF_F_HW_VLAN_CTAG_FILTER; |
|
1095 } |
|
1096 |
|
1097 if ((hw->mac_type >= e1000_82544) && |
|
1098 (hw->mac_type != e1000_82547)) |
|
1099 netdev->hw_features |= NETIF_F_TSO; |
|
1100 |
|
1101 netdev->priv_flags |= IFF_SUPP_NOFCS; |
|
1102 |
|
1103 netdev->features |= netdev->hw_features; |
|
1104 netdev->hw_features |= (NETIF_F_RXCSUM | |
|
1105 NETIF_F_RXALL | |
|
1106 NETIF_F_RXFCS); |
|
1107 |
|
1108 if (pci_using_dac) { |
|
1109 netdev->features |= NETIF_F_HIGHDMA; |
|
1110 netdev->vlan_features |= NETIF_F_HIGHDMA; |
|
1111 } |
|
1112 |
|
1113 netdev->vlan_features |= (NETIF_F_TSO | |
|
1114 NETIF_F_HW_CSUM | |
|
1115 NETIF_F_SG); |
|
1116 |
|
1117 netdev->priv_flags |= IFF_UNICAST_FLT; |
|
1118 |
|
1119 adapter->en_mng_pt = e1000_enable_mng_pass_thru(hw); |
|
1120 |
|
1121 /* initialize eeprom parameters */ |
|
1122 if (e1000_init_eeprom_params(hw)) { |
|
1123 e_err(probe, "EEPROM initialization failed\n"); |
|
1124 goto err_eeprom; |
|
1125 } |
|
1126 |
|
1127 /* before reading the EEPROM, reset the controller to |
|
1128 * put the device in a known good starting state |
|
1129 */ |
|
1130 |
|
1131 e1000_reset_hw(hw); |
|
1132 |
|
1133 /* make sure the EEPROM is good */ |
|
1134 if (e1000_validate_eeprom_checksum(hw) < 0) { |
|
1135 e_err(probe, "The EEPROM Checksum Is Not Valid\n"); |
|
1136 e1000_dump_eeprom(adapter); |
|
1137 /* set MAC address to all zeroes to invalidate and temporary |
|
1138 * disable this device for the user. This blocks regular |
|
1139 * traffic while still permitting ethtool ioctls from reaching |
|
1140 * the hardware as well as allowing the user to run the |
|
1141 * interface after manually setting a hw addr using |
|
1142 * `ip set address` |
|
1143 */ |
|
1144 memset(hw->mac_addr, 0, netdev->addr_len); |
|
1145 } else { |
|
1146 /* copy the MAC address out of the EEPROM */ |
|
1147 if (e1000_read_mac_addr(hw)) |
|
1148 e_err(probe, "EEPROM Read Error\n"); |
|
1149 } |
|
1150 /* don't block initalization here due to bad MAC address */ |
|
1151 memcpy(netdev->dev_addr, hw->mac_addr, netdev->addr_len); |
|
1152 |
|
1153 if (!is_valid_ether_addr(netdev->dev_addr)) |
|
1154 e_err(probe, "Invalid MAC Address\n"); |
|
1155 |
|
1156 |
|
1157 INIT_DELAYED_WORK(&adapter->watchdog_task, e1000_watchdog); |
|
1158 INIT_DELAYED_WORK(&adapter->fifo_stall_task, |
|
1159 e1000_82547_tx_fifo_stall_task); |
|
1160 INIT_DELAYED_WORK(&adapter->phy_info_task, e1000_update_phy_info_task); |
|
1161 INIT_WORK(&adapter->reset_task, e1000_reset_task); |
|
1162 |
|
1163 e1000_check_options(adapter); |
|
1164 |
|
1165 /* Initial Wake on LAN setting |
|
1166 * If APM wake is enabled in the EEPROM, |
|
1167 * enable the ACPI Magic Packet filter |
|
1168 */ |
|
1169 |
|
1170 switch (hw->mac_type) { |
|
1171 case e1000_82542_rev2_0: |
|
1172 case e1000_82542_rev2_1: |
|
1173 case e1000_82543: |
|
1174 break; |
|
1175 case e1000_82544: |
|
1176 e1000_read_eeprom(hw, |
|
1177 EEPROM_INIT_CONTROL2_REG, 1, &eeprom_data); |
|
1178 eeprom_apme_mask = E1000_EEPROM_82544_APM; |
|
1179 break; |
|
1180 case e1000_82546: |
|
1181 case e1000_82546_rev_3: |
|
1182 if (er32(STATUS) & E1000_STATUS_FUNC_1){ |
|
1183 e1000_read_eeprom(hw, |
|
1184 EEPROM_INIT_CONTROL3_PORT_B, 1, &eeprom_data); |
|
1185 break; |
|
1186 } |
|
1187 /* Fall Through */ |
|
1188 default: |
|
1189 e1000_read_eeprom(hw, |
|
1190 EEPROM_INIT_CONTROL3_PORT_A, 1, &eeprom_data); |
|
1191 break; |
|
1192 } |
|
1193 if (eeprom_data & eeprom_apme_mask) |
|
1194 adapter->eeprom_wol |= E1000_WUFC_MAG; |
|
1195 |
|
1196 /* now that we have the eeprom settings, apply the special cases |
|
1197 * where the eeprom may be wrong or the board simply won't support |
|
1198 * wake on lan on a particular port |
|
1199 */ |
|
1200 switch (pdev->device) { |
|
1201 case E1000_DEV_ID_82546GB_PCIE: |
|
1202 adapter->eeprom_wol = 0; |
|
1203 break; |
|
1204 case E1000_DEV_ID_82546EB_FIBER: |
|
1205 case E1000_DEV_ID_82546GB_FIBER: |
|
1206 /* Wake events only supported on port A for dual fiber |
|
1207 * regardless of eeprom setting |
|
1208 */ |
|
1209 if (er32(STATUS) & E1000_STATUS_FUNC_1) |
|
1210 adapter->eeprom_wol = 0; |
|
1211 break; |
|
1212 case E1000_DEV_ID_82546GB_QUAD_COPPER_KSP3: |
|
1213 /* if quad port adapter, disable WoL on all but port A */ |
|
1214 if (global_quad_port_a != 0) |
|
1215 adapter->eeprom_wol = 0; |
|
1216 else |
|
1217 adapter->quad_port_a = true; |
|
1218 /* Reset for multiple quad port adapters */ |
|
1219 if (++global_quad_port_a == 4) |
|
1220 global_quad_port_a = 0; |
|
1221 break; |
|
1222 } |
|
1223 |
|
1224 /* initialize the wol settings based on the eeprom settings */ |
|
1225 adapter->wol = adapter->eeprom_wol; |
|
1226 device_set_wakeup_enable(&adapter->pdev->dev, adapter->wol); |
|
1227 |
|
1228 /* Auto detect PHY address */ |
|
1229 if (hw->mac_type == e1000_ce4100) { |
|
1230 for (i = 0; i < 32; i++) { |
|
1231 hw->phy_addr = i; |
|
1232 e1000_read_phy_reg(hw, PHY_ID2, &tmp); |
|
1233 if (tmp == 0 || tmp == 0xFF) { |
|
1234 if (i == 31) |
|
1235 goto err_eeprom; |
|
1236 continue; |
|
1237 } else |
|
1238 break; |
|
1239 } |
|
1240 } |
|
1241 |
|
1242 /* reset the hardware with the new settings */ |
|
1243 e1000_reset(adapter); |
|
1244 |
|
1245 // offer device to EtherCAT master module |
|
1246 adapter->ecdev = ecdev_offer(netdev, ec_poll, THIS_MODULE); |
|
1247 if (adapter->ecdev) { |
|
1248 err = ecdev_open(adapter->ecdev); |
|
1249 if (err) { |
|
1250 ecdev_withdraw(adapter->ecdev); |
|
1251 goto err_register; |
|
1252 } |
|
1253 } else { |
|
1254 strcpy(netdev->name, "eth%d"); |
|
1255 err = register_netdev(netdev); |
|
1256 if (err) |
|
1257 goto err_register; |
|
1258 } |
|
1259 |
|
1260 e1000_vlan_filter_on_off(adapter, false); |
|
1261 |
|
1262 /* print bus type/speed/width info */ |
|
1263 e_info(probe, "(PCI%s:%dMHz:%d-bit) %pM\n", |
|
1264 ((hw->bus_type == e1000_bus_type_pcix) ? "-X" : ""), |
|
1265 ((hw->bus_speed == e1000_bus_speed_133) ? 133 : |
|
1266 (hw->bus_speed == e1000_bus_speed_120) ? 120 : |
|
1267 (hw->bus_speed == e1000_bus_speed_100) ? 100 : |
|
1268 (hw->bus_speed == e1000_bus_speed_66) ? 66 : 33), |
|
1269 ((hw->bus_width == e1000_bus_width_64) ? 64 : 32), |
|
1270 netdev->dev_addr); |
|
1271 |
|
1272 if (!adapter->ecdev) { |
|
1273 /* carrier off reporting is important to ethtool even BEFORE open */ |
|
1274 netif_carrier_off(netdev); |
|
1275 } |
|
1276 |
|
1277 e_info(probe, "Intel(R) PRO/1000 Network Connection\n"); |
|
1278 |
|
1279 cards_found++; |
|
1280 return 0; |
|
1281 |
|
1282 err_register: |
|
1283 err_eeprom: |
|
1284 e1000_phy_hw_reset(hw); |
|
1285 |
|
1286 if (hw->flash_address) |
|
1287 iounmap(hw->flash_address); |
|
1288 kfree(adapter->tx_ring); |
|
1289 kfree(adapter->rx_ring); |
|
1290 err_dma: |
|
1291 err_sw_init: |
|
1292 err_mdio_ioremap: |
|
1293 iounmap(hw->ce4100_gbe_mdio_base_virt); |
|
1294 iounmap(hw->hw_addr); |
|
1295 err_ioremap: |
|
1296 free_netdev(netdev); |
|
1297 err_alloc_etherdev: |
|
1298 pci_release_selected_regions(pdev, bars); |
|
1299 err_pci_reg: |
|
1300 pci_disable_device(pdev); |
|
1301 return err; |
|
1302 } |
|
1303 |
|
1304 /** |
|
1305 * e1000_remove - Device Removal Routine |
|
1306 * @pdev: PCI device information struct |
|
1307 * |
|
1308 * e1000_remove is called by the PCI subsystem to alert the driver |
|
1309 * that it should release a PCI device. The could be caused by a |
|
1310 * Hot-Plug event, or because the driver is going to be removed from |
|
1311 * memory. |
|
1312 **/ |
|
1313 static void e1000_remove(struct pci_dev *pdev) |
|
1314 { |
|
1315 struct net_device *netdev = pci_get_drvdata(pdev); |
|
1316 struct e1000_adapter *adapter = netdev_priv(netdev); |
|
1317 struct e1000_hw *hw = &adapter->hw; |
|
1318 |
|
1319 e1000_down_and_stop(adapter); |
|
1320 e1000_release_manageability(adapter); |
|
1321 |
|
1322 if (adapter->ecdev) { |
|
1323 ecdev_close(adapter->ecdev); |
|
1324 ecdev_withdraw(adapter->ecdev); |
|
1325 } else { |
|
1326 unregister_netdev(netdev); |
|
1327 } |
|
1328 |
|
1329 e1000_phy_hw_reset(hw); |
|
1330 |
|
1331 kfree(adapter->tx_ring); |
|
1332 kfree(adapter->rx_ring); |
|
1333 |
|
1334 if (hw->mac_type == e1000_ce4100) |
|
1335 iounmap(hw->ce4100_gbe_mdio_base_virt); |
|
1336 iounmap(hw->hw_addr); |
|
1337 if (hw->flash_address) |
|
1338 iounmap(hw->flash_address); |
|
1339 pci_release_selected_regions(pdev, adapter->bars); |
|
1340 |
|
1341 free_netdev(netdev); |
|
1342 |
|
1343 pci_disable_device(pdev); |
|
1344 } |
|
1345 |
|
1346 /** |
|
1347 * e1000_sw_init - Initialize general software structures (struct e1000_adapter) |
|
1348 * @adapter: board private structure to initialize |
|
1349 * |
|
1350 * e1000_sw_init initializes the Adapter private data structure. |
|
1351 * e1000_init_hw_struct MUST be called before this function |
|
1352 **/ |
|
1353 static int e1000_sw_init(struct e1000_adapter *adapter) |
|
1354 { |
|
1355 adapter->rx_buffer_len = MAXIMUM_ETHERNET_VLAN_SIZE; |
|
1356 |
|
1357 adapter->num_tx_queues = 1; |
|
1358 adapter->num_rx_queues = 1; |
|
1359 |
|
1360 if (e1000_alloc_queues(adapter)) { |
|
1361 e_err(probe, "Unable to allocate memory for queues\n"); |
|
1362 return -ENOMEM; |
|
1363 } |
|
1364 |
|
1365 /* Explicitly disable IRQ since the NIC can be in any state. */ |
|
1366 e1000_irq_disable(adapter); |
|
1367 |
|
1368 spin_lock_init(&adapter->stats_lock); |
|
1369 |
|
1370 set_bit(__E1000_DOWN, &adapter->flags); |
|
1371 |
|
1372 return 0; |
|
1373 } |
|
1374 |
|
1375 /** |
|
1376 * e1000_alloc_queues - Allocate memory for all rings |
|
1377 * @adapter: board private structure to initialize |
|
1378 * |
|
1379 * We allocate one ring per queue at run-time since we don't know the |
|
1380 * number of queues at compile-time. |
|
1381 **/ |
|
1382 static int e1000_alloc_queues(struct e1000_adapter *adapter) |
|
1383 { |
|
1384 adapter->tx_ring = kcalloc(adapter->num_tx_queues, |
|
1385 sizeof(struct e1000_tx_ring), GFP_KERNEL); |
|
1386 if (!adapter->tx_ring) |
|
1387 return -ENOMEM; |
|
1388 |
|
1389 adapter->rx_ring = kcalloc(adapter->num_rx_queues, |
|
1390 sizeof(struct e1000_rx_ring), GFP_KERNEL); |
|
1391 if (!adapter->rx_ring) { |
|
1392 kfree(adapter->tx_ring); |
|
1393 return -ENOMEM; |
|
1394 } |
|
1395 |
|
1396 return E1000_SUCCESS; |
|
1397 } |
|
1398 |
|
1399 /** |
|
1400 * e1000_open - Called when a network interface is made active |
|
1401 * @netdev: network interface device structure |
|
1402 * |
|
1403 * Returns 0 on success, negative value on failure |
|
1404 * |
|
1405 * The open entry point is called when a network interface is made |
|
1406 * active by the system (IFF_UP). At this point all resources needed |
|
1407 * for transmit and receive operations are allocated, the interrupt |
|
1408 * handler is registered with the OS, the watchdog task is started, |
|
1409 * and the stack is notified that the interface is ready. |
|
1410 **/ |
|
1411 static int e1000_open(struct net_device *netdev) |
|
1412 { |
|
1413 struct e1000_adapter *adapter = netdev_priv(netdev); |
|
1414 struct e1000_hw *hw = &adapter->hw; |
|
1415 int err; |
|
1416 |
|
1417 /* disallow open during test */ |
|
1418 if (test_bit(__E1000_TESTING, &adapter->flags)) |
|
1419 return -EBUSY; |
|
1420 |
|
1421 netif_carrier_off(netdev); |
|
1422 |
|
1423 /* allocate transmit descriptors */ |
|
1424 err = e1000_setup_all_tx_resources(adapter); |
|
1425 if (err) |
|
1426 goto err_setup_tx; |
|
1427 |
|
1428 /* allocate receive descriptors */ |
|
1429 err = e1000_setup_all_rx_resources(adapter); |
|
1430 if (err) |
|
1431 goto err_setup_rx; |
|
1432 |
|
1433 e1000_power_up_phy(adapter); |
|
1434 |
|
1435 adapter->mng_vlan_id = E1000_MNG_VLAN_NONE; |
|
1436 if ((hw->mng_cookie.status & |
|
1437 E1000_MNG_DHCP_COOKIE_STATUS_VLAN_SUPPORT)) { |
|
1438 e1000_update_mng_vlan(adapter); |
|
1439 } |
|
1440 |
|
1441 /* before we allocate an interrupt, we must be ready to handle it. |
|
1442 * Setting DEBUG_SHIRQ in the kernel makes it fire an interrupt |
|
1443 * as soon as we call pci_request_irq, so we have to setup our |
|
1444 * clean_rx handler before we do so. |
|
1445 */ |
|
1446 e1000_configure(adapter); |
|
1447 |
|
1448 err = e1000_request_irq(adapter); |
|
1449 if (err) |
|
1450 goto err_req_irq; |
|
1451 |
|
1452 /* From here on the code is the same as e1000_up() */ |
|
1453 clear_bit(__E1000_DOWN, &adapter->flags); |
|
1454 |
|
1455 if (!adapter->ecdev) { |
|
1456 napi_enable(&adapter->napi); |
|
1457 |
|
1458 e1000_irq_enable(adapter); |
|
1459 |
|
1460 netif_start_queue(netdev); |
|
1461 } |
|
1462 |
|
1463 /* fire a link status change interrupt to start the watchdog */ |
|
1464 ew32(ICS, E1000_ICS_LSC); |
|
1465 |
|
1466 return E1000_SUCCESS; |
|
1467 |
|
1468 err_req_irq: |
|
1469 e1000_power_down_phy(adapter); |
|
1470 e1000_free_all_rx_resources(adapter); |
|
1471 err_setup_rx: |
|
1472 e1000_free_all_tx_resources(adapter); |
|
1473 err_setup_tx: |
|
1474 e1000_reset(adapter); |
|
1475 |
|
1476 return err; |
|
1477 } |
|
1478 |
|
1479 /** |
|
1480 * e1000_close - Disables a network interface |
|
1481 * @netdev: network interface device structure |
|
1482 * |
|
1483 * Returns 0, this is not allowed to fail |
|
1484 * |
|
1485 * The close entry point is called when an interface is de-activated |
|
1486 * by the OS. The hardware is still under the drivers control, but |
|
1487 * needs to be disabled. A global MAC reset is issued to stop the |
|
1488 * hardware, and all transmit and receive resources are freed. |
|
1489 **/ |
|
1490 static int e1000_close(struct net_device *netdev) |
|
1491 { |
|
1492 struct e1000_adapter *adapter = netdev_priv(netdev); |
|
1493 struct e1000_hw *hw = &adapter->hw; |
|
1494 int count = E1000_CHECK_RESET_COUNT; |
|
1495 |
|
1496 while (test_bit(__E1000_RESETTING, &adapter->flags) && count--) |
|
1497 usleep_range(10000, 20000); |
|
1498 |
|
1499 WARN_ON(test_bit(__E1000_RESETTING, &adapter->flags)); |
|
1500 e1000_down(adapter); |
|
1501 e1000_power_down_phy(adapter); |
|
1502 e1000_free_irq(adapter); |
|
1503 |
|
1504 e1000_free_all_tx_resources(adapter); |
|
1505 e1000_free_all_rx_resources(adapter); |
|
1506 |
|
1507 /* kill manageability vlan ID if supported, but not if a vlan with |
|
1508 * the same ID is registered on the host OS (let 8021q kill it) |
|
1509 */ |
|
1510 if ((hw->mng_cookie.status & |
|
1511 E1000_MNG_DHCP_COOKIE_STATUS_VLAN_SUPPORT) && |
|
1512 !test_bit(adapter->mng_vlan_id, adapter->active_vlans)) { |
|
1513 e1000_vlan_rx_kill_vid(netdev, htons(ETH_P_8021Q), |
|
1514 adapter->mng_vlan_id); |
|
1515 } |
|
1516 |
|
1517 return 0; |
|
1518 } |
|
1519 |
|
1520 /** |
|
1521 * e1000_check_64k_bound - check that memory doesn't cross 64kB boundary |
|
1522 * @adapter: address of board private structure |
|
1523 * @start: address of beginning of memory |
|
1524 * @len: length of memory |
|
1525 **/ |
|
1526 static bool e1000_check_64k_bound(struct e1000_adapter *adapter, void *start, |
|
1527 unsigned long len) |
|
1528 { |
|
1529 struct e1000_hw *hw = &adapter->hw; |
|
1530 unsigned long begin = (unsigned long)start; |
|
1531 unsigned long end = begin + len; |
|
1532 |
|
1533 /* First rev 82545 and 82546 need to not allow any memory |
|
1534 * write location to cross 64k boundary due to errata 23 |
|
1535 */ |
|
1536 if (hw->mac_type == e1000_82545 || |
|
1537 hw->mac_type == e1000_ce4100 || |
|
1538 hw->mac_type == e1000_82546) { |
|
1539 return ((begin ^ (end - 1)) >> 16) != 0 ? false : true; |
|
1540 } |
|
1541 |
|
1542 return true; |
|
1543 } |
|
1544 |
|
1545 /** |
|
1546 * e1000_setup_tx_resources - allocate Tx resources (Descriptors) |
|
1547 * @adapter: board private structure |
|
1548 * @txdr: tx descriptor ring (for a specific queue) to setup |
|
1549 * |
|
1550 * Return 0 on success, negative on failure |
|
1551 **/ |
|
1552 static int e1000_setup_tx_resources(struct e1000_adapter *adapter, |
|
1553 struct e1000_tx_ring *txdr) |
|
1554 { |
|
1555 struct pci_dev *pdev = adapter->pdev; |
|
1556 int size; |
|
1557 |
|
1558 size = sizeof(struct e1000_buffer) * txdr->count; |
|
1559 txdr->buffer_info = vzalloc(size); |
|
1560 if (!txdr->buffer_info) |
|
1561 return -ENOMEM; |
|
1562 |
|
1563 /* round up to nearest 4K */ |
|
1564 |
|
1565 txdr->size = txdr->count * sizeof(struct e1000_tx_desc); |
|
1566 txdr->size = ALIGN(txdr->size, 4096); |
|
1567 |
|
1568 txdr->desc = dma_alloc_coherent(&pdev->dev, txdr->size, &txdr->dma, |
|
1569 GFP_KERNEL); |
|
1570 if (!txdr->desc) { |
|
1571 setup_tx_desc_die: |
|
1572 vfree(txdr->buffer_info); |
|
1573 return -ENOMEM; |
|
1574 } |
|
1575 |
|
1576 /* Fix for errata 23, can't cross 64kB boundary */ |
|
1577 if (!e1000_check_64k_bound(adapter, txdr->desc, txdr->size)) { |
|
1578 void *olddesc = txdr->desc; |
|
1579 dma_addr_t olddma = txdr->dma; |
|
1580 e_err(tx_err, "txdr align check failed: %u bytes at %p\n", |
|
1581 txdr->size, txdr->desc); |
|
1582 /* Try again, without freeing the previous */ |
|
1583 txdr->desc = dma_alloc_coherent(&pdev->dev, txdr->size, |
|
1584 &txdr->dma, GFP_KERNEL); |
|
1585 /* Failed allocation, critical failure */ |
|
1586 if (!txdr->desc) { |
|
1587 dma_free_coherent(&pdev->dev, txdr->size, olddesc, |
|
1588 olddma); |
|
1589 goto setup_tx_desc_die; |
|
1590 } |
|
1591 |
|
1592 if (!e1000_check_64k_bound(adapter, txdr->desc, txdr->size)) { |
|
1593 /* give up */ |
|
1594 dma_free_coherent(&pdev->dev, txdr->size, txdr->desc, |
|
1595 txdr->dma); |
|
1596 dma_free_coherent(&pdev->dev, txdr->size, olddesc, |
|
1597 olddma); |
|
1598 e_err(probe, "Unable to allocate aligned memory " |
|
1599 "for the transmit descriptor ring\n"); |
|
1600 vfree(txdr->buffer_info); |
|
1601 return -ENOMEM; |
|
1602 } else { |
|
1603 /* Free old allocation, new allocation was successful */ |
|
1604 dma_free_coherent(&pdev->dev, txdr->size, olddesc, |
|
1605 olddma); |
|
1606 } |
|
1607 } |
|
1608 memset(txdr->desc, 0, txdr->size); |
|
1609 |
|
1610 txdr->next_to_use = 0; |
|
1611 txdr->next_to_clean = 0; |
|
1612 |
|
1613 return 0; |
|
1614 } |
|
1615 |
|
1616 /** |
|
1617 * e1000_setup_all_tx_resources - wrapper to allocate Tx resources |
|
1618 * (Descriptors) for all queues |
|
1619 * @adapter: board private structure |
|
1620 * |
|
1621 * Return 0 on success, negative on failure |
|
1622 **/ |
|
1623 int e1000_setup_all_tx_resources(struct e1000_adapter *adapter) |
|
1624 { |
|
1625 int i, err = 0; |
|
1626 |
|
1627 for (i = 0; i < adapter->num_tx_queues; i++) { |
|
1628 err = e1000_setup_tx_resources(adapter, &adapter->tx_ring[i]); |
|
1629 if (err) { |
|
1630 e_err(probe, "Allocation for Tx Queue %u failed\n", i); |
|
1631 for (i-- ; i >= 0; i--) |
|
1632 e1000_free_tx_resources(adapter, |
|
1633 &adapter->tx_ring[i]); |
|
1634 break; |
|
1635 } |
|
1636 } |
|
1637 |
|
1638 return err; |
|
1639 } |
|
1640 |
|
1641 /** |
|
1642 * e1000_configure_tx - Configure 8254x Transmit Unit after Reset |
|
1643 * @adapter: board private structure |
|
1644 * |
|
1645 * Configure the Tx unit of the MAC after a reset. |
|
1646 **/ |
|
1647 static void e1000_configure_tx(struct e1000_adapter *adapter) |
|
1648 { |
|
1649 u64 tdba; |
|
1650 struct e1000_hw *hw = &adapter->hw; |
|
1651 u32 tdlen, tctl, tipg; |
|
1652 u32 ipgr1, ipgr2; |
|
1653 |
|
1654 /* Setup the HW Tx Head and Tail descriptor pointers */ |
|
1655 |
|
1656 switch (adapter->num_tx_queues) { |
|
1657 case 1: |
|
1658 default: |
|
1659 tdba = adapter->tx_ring[0].dma; |
|
1660 tdlen = adapter->tx_ring[0].count * |
|
1661 sizeof(struct e1000_tx_desc); |
|
1662 ew32(TDLEN, tdlen); |
|
1663 ew32(TDBAH, (tdba >> 32)); |
|
1664 ew32(TDBAL, (tdba & 0x00000000ffffffffULL)); |
|
1665 ew32(TDT, 0); |
|
1666 ew32(TDH, 0); |
|
1667 adapter->tx_ring[0].tdh = ((hw->mac_type >= e1000_82543) ? |
|
1668 E1000_TDH : E1000_82542_TDH); |
|
1669 adapter->tx_ring[0].tdt = ((hw->mac_type >= e1000_82543) ? |
|
1670 E1000_TDT : E1000_82542_TDT); |
|
1671 break; |
|
1672 } |
|
1673 |
|
1674 /* Set the default values for the Tx Inter Packet Gap timer */ |
|
1675 if ((hw->media_type == e1000_media_type_fiber || |
|
1676 hw->media_type == e1000_media_type_internal_serdes)) |
|
1677 tipg = DEFAULT_82543_TIPG_IPGT_FIBER; |
|
1678 else |
|
1679 tipg = DEFAULT_82543_TIPG_IPGT_COPPER; |
|
1680 |
|
1681 switch (hw->mac_type) { |
|
1682 case e1000_82542_rev2_0: |
|
1683 case e1000_82542_rev2_1: |
|
1684 tipg = DEFAULT_82542_TIPG_IPGT; |
|
1685 ipgr1 = DEFAULT_82542_TIPG_IPGR1; |
|
1686 ipgr2 = DEFAULT_82542_TIPG_IPGR2; |
|
1687 break; |
|
1688 default: |
|
1689 ipgr1 = DEFAULT_82543_TIPG_IPGR1; |
|
1690 ipgr2 = DEFAULT_82543_TIPG_IPGR2; |
|
1691 break; |
|
1692 } |
|
1693 tipg |= ipgr1 << E1000_TIPG_IPGR1_SHIFT; |
|
1694 tipg |= ipgr2 << E1000_TIPG_IPGR2_SHIFT; |
|
1695 ew32(TIPG, tipg); |
|
1696 |
|
1697 /* Set the Tx Interrupt Delay register */ |
|
1698 |
|
1699 ew32(TIDV, adapter->tx_int_delay); |
|
1700 if (hw->mac_type >= e1000_82540) |
|
1701 ew32(TADV, adapter->tx_abs_int_delay); |
|
1702 |
|
1703 /* Program the Transmit Control Register */ |
|
1704 |
|
1705 tctl = er32(TCTL); |
|
1706 tctl &= ~E1000_TCTL_CT; |
|
1707 tctl |= E1000_TCTL_PSP | E1000_TCTL_RTLC | |
|
1708 (E1000_COLLISION_THRESHOLD << E1000_CT_SHIFT); |
|
1709 |
|
1710 e1000_config_collision_dist(hw); |
|
1711 |
|
1712 /* Setup Transmit Descriptor Settings for eop descriptor */ |
|
1713 adapter->txd_cmd = E1000_TXD_CMD_EOP | E1000_TXD_CMD_IFCS; |
|
1714 |
|
1715 /* only set IDE if we are delaying interrupts using the timers */ |
|
1716 if (adapter->tx_int_delay) |
|
1717 adapter->txd_cmd |= E1000_TXD_CMD_IDE; |
|
1718 |
|
1719 if (hw->mac_type < e1000_82543) |
|
1720 adapter->txd_cmd |= E1000_TXD_CMD_RPS; |
|
1721 else |
|
1722 adapter->txd_cmd |= E1000_TXD_CMD_RS; |
|
1723 |
|
1724 /* Cache if we're 82544 running in PCI-X because we'll |
|
1725 * need this to apply a workaround later in the send path. |
|
1726 */ |
|
1727 if (hw->mac_type == e1000_82544 && |
|
1728 hw->bus_type == e1000_bus_type_pcix) |
|
1729 adapter->pcix_82544 = true; |
|
1730 |
|
1731 ew32(TCTL, tctl); |
|
1732 |
|
1733 } |
|
1734 |
|
1735 /** |
|
1736 * e1000_setup_rx_resources - allocate Rx resources (Descriptors) |
|
1737 * @adapter: board private structure |
|
1738 * @rxdr: rx descriptor ring (for a specific queue) to setup |
|
1739 * |
|
1740 * Returns 0 on success, negative on failure |
|
1741 **/ |
|
1742 static int e1000_setup_rx_resources(struct e1000_adapter *adapter, |
|
1743 struct e1000_rx_ring *rxdr) |
|
1744 { |
|
1745 struct pci_dev *pdev = adapter->pdev; |
|
1746 int size, desc_len; |
|
1747 |
|
1748 size = sizeof(struct e1000_buffer) * rxdr->count; |
|
1749 rxdr->buffer_info = vzalloc(size); |
|
1750 if (!rxdr->buffer_info) |
|
1751 return -ENOMEM; |
|
1752 |
|
1753 desc_len = sizeof(struct e1000_rx_desc); |
|
1754 |
|
1755 /* Round up to nearest 4K */ |
|
1756 |
|
1757 rxdr->size = rxdr->count * desc_len; |
|
1758 rxdr->size = ALIGN(rxdr->size, 4096); |
|
1759 |
|
1760 rxdr->desc = dma_alloc_coherent(&pdev->dev, rxdr->size, &rxdr->dma, |
|
1761 GFP_KERNEL); |
|
1762 if (!rxdr->desc) { |
|
1763 setup_rx_desc_die: |
|
1764 vfree(rxdr->buffer_info); |
|
1765 return -ENOMEM; |
|
1766 } |
|
1767 |
|
1768 /* Fix for errata 23, can't cross 64kB boundary */ |
|
1769 if (!e1000_check_64k_bound(adapter, rxdr->desc, rxdr->size)) { |
|
1770 void *olddesc = rxdr->desc; |
|
1771 dma_addr_t olddma = rxdr->dma; |
|
1772 e_err(rx_err, "rxdr align check failed: %u bytes at %p\n", |
|
1773 rxdr->size, rxdr->desc); |
|
1774 /* Try again, without freeing the previous */ |
|
1775 rxdr->desc = dma_alloc_coherent(&pdev->dev, rxdr->size, |
|
1776 &rxdr->dma, GFP_KERNEL); |
|
1777 /* Failed allocation, critical failure */ |
|
1778 if (!rxdr->desc) { |
|
1779 dma_free_coherent(&pdev->dev, rxdr->size, olddesc, |
|
1780 olddma); |
|
1781 goto setup_rx_desc_die; |
|
1782 } |
|
1783 |
|
1784 if (!e1000_check_64k_bound(adapter, rxdr->desc, rxdr->size)) { |
|
1785 /* give up */ |
|
1786 dma_free_coherent(&pdev->dev, rxdr->size, rxdr->desc, |
|
1787 rxdr->dma); |
|
1788 dma_free_coherent(&pdev->dev, rxdr->size, olddesc, |
|
1789 olddma); |
|
1790 e_err(probe, "Unable to allocate aligned memory for " |
|
1791 "the Rx descriptor ring\n"); |
|
1792 goto setup_rx_desc_die; |
|
1793 } else { |
|
1794 /* Free old allocation, new allocation was successful */ |
|
1795 dma_free_coherent(&pdev->dev, rxdr->size, olddesc, |
|
1796 olddma); |
|
1797 } |
|
1798 } |
|
1799 memset(rxdr->desc, 0, rxdr->size); |
|
1800 |
|
1801 rxdr->next_to_clean = 0; |
|
1802 rxdr->next_to_use = 0; |
|
1803 rxdr->rx_skb_top = NULL; |
|
1804 |
|
1805 return 0; |
|
1806 } |
|
1807 |
|
1808 /** |
|
1809 * e1000_setup_all_rx_resources - wrapper to allocate Rx resources |
|
1810 * (Descriptors) for all queues |
|
1811 * @adapter: board private structure |
|
1812 * |
|
1813 * Return 0 on success, negative on failure |
|
1814 **/ |
|
1815 int e1000_setup_all_rx_resources(struct e1000_adapter *adapter) |
|
1816 { |
|
1817 int i, err = 0; |
|
1818 |
|
1819 for (i = 0; i < adapter->num_rx_queues; i++) { |
|
1820 err = e1000_setup_rx_resources(adapter, &adapter->rx_ring[i]); |
|
1821 if (err) { |
|
1822 e_err(probe, "Allocation for Rx Queue %u failed\n", i); |
|
1823 for (i-- ; i >= 0; i--) |
|
1824 e1000_free_rx_resources(adapter, |
|
1825 &adapter->rx_ring[i]); |
|
1826 break; |
|
1827 } |
|
1828 } |
|
1829 |
|
1830 return err; |
|
1831 } |
|
1832 |
|
1833 /** |
|
1834 * e1000_setup_rctl - configure the receive control registers |
|
1835 * @adapter: Board private structure |
|
1836 **/ |
|
1837 static void e1000_setup_rctl(struct e1000_adapter *adapter) |
|
1838 { |
|
1839 struct e1000_hw *hw = &adapter->hw; |
|
1840 u32 rctl; |
|
1841 |
|
1842 rctl = er32(RCTL); |
|
1843 |
|
1844 rctl &= ~(3 << E1000_RCTL_MO_SHIFT); |
|
1845 |
|
1846 rctl |= E1000_RCTL_BAM | E1000_RCTL_LBM_NO | |
|
1847 E1000_RCTL_RDMTS_HALF | |
|
1848 (hw->mc_filter_type << E1000_RCTL_MO_SHIFT); |
|
1849 |
|
1850 if (hw->tbi_compatibility_on == 1) |
|
1851 rctl |= E1000_RCTL_SBP; |
|
1852 else |
|
1853 rctl &= ~E1000_RCTL_SBP; |
|
1854 |
|
1855 if (adapter->netdev->mtu <= ETH_DATA_LEN) |
|
1856 rctl &= ~E1000_RCTL_LPE; |
|
1857 else |
|
1858 rctl |= E1000_RCTL_LPE; |
|
1859 |
|
1860 /* Setup buffer sizes */ |
|
1861 rctl &= ~E1000_RCTL_SZ_4096; |
|
1862 rctl |= E1000_RCTL_BSEX; |
|
1863 switch (adapter->rx_buffer_len) { |
|
1864 case E1000_RXBUFFER_2048: |
|
1865 default: |
|
1866 rctl |= E1000_RCTL_SZ_2048; |
|
1867 rctl &= ~E1000_RCTL_BSEX; |
|
1868 break; |
|
1869 case E1000_RXBUFFER_4096: |
|
1870 rctl |= E1000_RCTL_SZ_4096; |
|
1871 break; |
|
1872 case E1000_RXBUFFER_8192: |
|
1873 rctl |= E1000_RCTL_SZ_8192; |
|
1874 break; |
|
1875 case E1000_RXBUFFER_16384: |
|
1876 rctl |= E1000_RCTL_SZ_16384; |
|
1877 break; |
|
1878 } |
|
1879 |
|
1880 /* This is useful for sniffing bad packets. */ |
|
1881 if (adapter->netdev->features & NETIF_F_RXALL) { |
|
1882 /* UPE and MPE will be handled by normal PROMISC logic |
|
1883 * in e1000e_set_rx_mode |
|
1884 */ |
|
1885 rctl |= (E1000_RCTL_SBP | /* Receive bad packets */ |
|
1886 E1000_RCTL_BAM | /* RX All Bcast Pkts */ |
|
1887 E1000_RCTL_PMCF); /* RX All MAC Ctrl Pkts */ |
|
1888 |
|
1889 rctl &= ~(E1000_RCTL_VFE | /* Disable VLAN filter */ |
|
1890 E1000_RCTL_DPF | /* Allow filtered pause */ |
|
1891 E1000_RCTL_CFIEN); /* Dis VLAN CFIEN Filter */ |
|
1892 /* Do not mess with E1000_CTRL_VME, it affects transmit as well, |
|
1893 * and that breaks VLANs. |
|
1894 */ |
|
1895 } |
|
1896 |
|
1897 ew32(RCTL, rctl); |
|
1898 } |
|
1899 |
|
1900 /** |
|
1901 * e1000_configure_rx - Configure 8254x Receive Unit after Reset |
|
1902 * @adapter: board private structure |
|
1903 * |
|
1904 * Configure the Rx unit of the MAC after a reset. |
|
1905 **/ |
|
1906 static void e1000_configure_rx(struct e1000_adapter *adapter) |
|
1907 { |
|
1908 u64 rdba; |
|
1909 struct e1000_hw *hw = &adapter->hw; |
|
1910 u32 rdlen, rctl, rxcsum; |
|
1911 |
|
1912 if (adapter->netdev->mtu > ETH_DATA_LEN) { |
|
1913 rdlen = adapter->rx_ring[0].count * |
|
1914 sizeof(struct e1000_rx_desc); |
|
1915 adapter->clean_rx = e1000_clean_jumbo_rx_irq; |
|
1916 adapter->alloc_rx_buf = e1000_alloc_jumbo_rx_buffers; |
|
1917 } else { |
|
1918 rdlen = adapter->rx_ring[0].count * |
|
1919 sizeof(struct e1000_rx_desc); |
|
1920 adapter->clean_rx = e1000_clean_rx_irq; |
|
1921 adapter->alloc_rx_buf = e1000_alloc_rx_buffers; |
|
1922 } |
|
1923 |
|
1924 /* disable receives while setting up the descriptors */ |
|
1925 rctl = er32(RCTL); |
|
1926 ew32(RCTL, rctl & ~E1000_RCTL_EN); |
|
1927 |
|
1928 /* set the Receive Delay Timer Register */ |
|
1929 ew32(RDTR, adapter->rx_int_delay); |
|
1930 |
|
1931 if (hw->mac_type >= e1000_82540) { |
|
1932 ew32(RADV, adapter->rx_abs_int_delay); |
|
1933 if (adapter->itr_setting != 0) |
|
1934 ew32(ITR, 1000000000 / (adapter->itr * 256)); |
|
1935 } |
|
1936 |
|
1937 /* Setup the HW Rx Head and Tail Descriptor Pointers and |
|
1938 * the Base and Length of the Rx Descriptor Ring |
|
1939 */ |
|
1940 switch (adapter->num_rx_queues) { |
|
1941 case 1: |
|
1942 default: |
|
1943 rdba = adapter->rx_ring[0].dma; |
|
1944 ew32(RDLEN, rdlen); |
|
1945 ew32(RDBAH, (rdba >> 32)); |
|
1946 ew32(RDBAL, (rdba & 0x00000000ffffffffULL)); |
|
1947 ew32(RDT, 0); |
|
1948 ew32(RDH, 0); |
|
1949 adapter->rx_ring[0].rdh = ((hw->mac_type >= e1000_82543) ? |
|
1950 E1000_RDH : E1000_82542_RDH); |
|
1951 adapter->rx_ring[0].rdt = ((hw->mac_type >= e1000_82543) ? |
|
1952 E1000_RDT : E1000_82542_RDT); |
|
1953 break; |
|
1954 } |
|
1955 |
|
1956 /* Enable 82543 Receive Checksum Offload for TCP and UDP */ |
|
1957 if (hw->mac_type >= e1000_82543) { |
|
1958 rxcsum = er32(RXCSUM); |
|
1959 if (adapter->rx_csum) |
|
1960 rxcsum |= E1000_RXCSUM_TUOFL; |
|
1961 else |
|
1962 /* don't need to clear IPPCSE as it defaults to 0 */ |
|
1963 rxcsum &= ~E1000_RXCSUM_TUOFL; |
|
1964 ew32(RXCSUM, rxcsum); |
|
1965 } |
|
1966 |
|
1967 /* Enable Receives */ |
|
1968 ew32(RCTL, rctl | E1000_RCTL_EN); |
|
1969 } |
|
1970 |
|
1971 /** |
|
1972 * e1000_free_tx_resources - Free Tx Resources per Queue |
|
1973 * @adapter: board private structure |
|
1974 * @tx_ring: Tx descriptor ring for a specific queue |
|
1975 * |
|
1976 * Free all transmit software resources |
|
1977 **/ |
|
1978 static void e1000_free_tx_resources(struct e1000_adapter *adapter, |
|
1979 struct e1000_tx_ring *tx_ring) |
|
1980 { |
|
1981 struct pci_dev *pdev = adapter->pdev; |
|
1982 |
|
1983 e1000_clean_tx_ring(adapter, tx_ring); |
|
1984 |
|
1985 vfree(tx_ring->buffer_info); |
|
1986 tx_ring->buffer_info = NULL; |
|
1987 |
|
1988 dma_free_coherent(&pdev->dev, tx_ring->size, tx_ring->desc, |
|
1989 tx_ring->dma); |
|
1990 |
|
1991 tx_ring->desc = NULL; |
|
1992 } |
|
1993 |
|
1994 /** |
|
1995 * e1000_free_all_tx_resources - Free Tx Resources for All Queues |
|
1996 * @adapter: board private structure |
|
1997 * |
|
1998 * Free all transmit software resources |
|
1999 **/ |
|
2000 void e1000_free_all_tx_resources(struct e1000_adapter *adapter) |
|
2001 { |
|
2002 int i; |
|
2003 |
|
2004 for (i = 0; i < adapter->num_tx_queues; i++) |
|
2005 e1000_free_tx_resources(adapter, &adapter->tx_ring[i]); |
|
2006 } |
|
2007 |
|
2008 static void e1000_unmap_and_free_tx_resource(struct e1000_adapter *adapter, |
|
2009 struct e1000_buffer *buffer_info) |
|
2010 { |
|
2011 if (adapter->ecdev) { |
|
2012 return; |
|
2013 } |
|
2014 |
|
2015 if (buffer_info->dma) { |
|
2016 if (buffer_info->mapped_as_page) |
|
2017 dma_unmap_page(&adapter->pdev->dev, buffer_info->dma, |
|
2018 buffer_info->length, DMA_TO_DEVICE); |
|
2019 else |
|
2020 dma_unmap_single(&adapter->pdev->dev, buffer_info->dma, |
|
2021 buffer_info->length, |
|
2022 DMA_TO_DEVICE); |
|
2023 buffer_info->dma = 0; |
|
2024 } |
|
2025 if (buffer_info->skb) { |
|
2026 dev_kfree_skb_any(buffer_info->skb); |
|
2027 buffer_info->skb = NULL; |
|
2028 } |
|
2029 buffer_info->time_stamp = 0; |
|
2030 /* buffer_info must be completely set up in the transmit path */ |
|
2031 } |
|
2032 |
|
2033 /** |
|
2034 * e1000_clean_tx_ring - Free Tx Buffers |
|
2035 * @adapter: board private structure |
|
2036 * @tx_ring: ring to be cleaned |
|
2037 **/ |
|
2038 static void e1000_clean_tx_ring(struct e1000_adapter *adapter, |
|
2039 struct e1000_tx_ring *tx_ring) |
|
2040 { |
|
2041 struct e1000_hw *hw = &adapter->hw; |
|
2042 struct e1000_buffer *buffer_info; |
|
2043 unsigned long size; |
|
2044 unsigned int i; |
|
2045 |
|
2046 /* Free all the Tx ring sk_buffs */ |
|
2047 |
|
2048 for (i = 0; i < tx_ring->count; i++) { |
|
2049 buffer_info = &tx_ring->buffer_info[i]; |
|
2050 e1000_unmap_and_free_tx_resource(adapter, buffer_info); |
|
2051 } |
|
2052 |
|
2053 netdev_reset_queue(adapter->netdev); |
|
2054 size = sizeof(struct e1000_buffer) * tx_ring->count; |
|
2055 memset(tx_ring->buffer_info, 0, size); |
|
2056 |
|
2057 /* Zero out the descriptor ring */ |
|
2058 |
|
2059 memset(tx_ring->desc, 0, tx_ring->size); |
|
2060 |
|
2061 tx_ring->next_to_use = 0; |
|
2062 tx_ring->next_to_clean = 0; |
|
2063 tx_ring->last_tx_tso = false; |
|
2064 |
|
2065 writel(0, hw->hw_addr + tx_ring->tdh); |
|
2066 writel(0, hw->hw_addr + tx_ring->tdt); |
|
2067 } |
|
2068 |
|
2069 /** |
|
2070 * e1000_clean_all_tx_rings - Free Tx Buffers for all queues |
|
2071 * @adapter: board private structure |
|
2072 **/ |
|
2073 static void e1000_clean_all_tx_rings(struct e1000_adapter *adapter) |
|
2074 { |
|
2075 int i; |
|
2076 |
|
2077 for (i = 0; i < adapter->num_tx_queues; i++) |
|
2078 e1000_clean_tx_ring(adapter, &adapter->tx_ring[i]); |
|
2079 } |
|
2080 |
|
2081 /** |
|
2082 * e1000_free_rx_resources - Free Rx Resources |
|
2083 * @adapter: board private structure |
|
2084 * @rx_ring: ring to clean the resources from |
|
2085 * |
|
2086 * Free all receive software resources |
|
2087 **/ |
|
2088 static void e1000_free_rx_resources(struct e1000_adapter *adapter, |
|
2089 struct e1000_rx_ring *rx_ring) |
|
2090 { |
|
2091 struct pci_dev *pdev = adapter->pdev; |
|
2092 |
|
2093 e1000_clean_rx_ring(adapter, rx_ring); |
|
2094 |
|
2095 vfree(rx_ring->buffer_info); |
|
2096 rx_ring->buffer_info = NULL; |
|
2097 |
|
2098 dma_free_coherent(&pdev->dev, rx_ring->size, rx_ring->desc, |
|
2099 rx_ring->dma); |
|
2100 |
|
2101 rx_ring->desc = NULL; |
|
2102 } |
|
2103 |
|
2104 /** |
|
2105 * e1000_free_all_rx_resources - Free Rx Resources for All Queues |
|
2106 * @adapter: board private structure |
|
2107 * |
|
2108 * Free all receive software resources |
|
2109 **/ |
|
2110 void e1000_free_all_rx_resources(struct e1000_adapter *adapter) |
|
2111 { |
|
2112 int i; |
|
2113 |
|
2114 for (i = 0; i < adapter->num_rx_queues; i++) |
|
2115 e1000_free_rx_resources(adapter, &adapter->rx_ring[i]); |
|
2116 } |
|
2117 |
|
2118 /** |
|
2119 * e1000_clean_rx_ring - Free Rx Buffers per Queue |
|
2120 * @adapter: board private structure |
|
2121 * @rx_ring: ring to free buffers from |
|
2122 **/ |
|
2123 static void e1000_clean_rx_ring(struct e1000_adapter *adapter, |
|
2124 struct e1000_rx_ring *rx_ring) |
|
2125 { |
|
2126 struct e1000_hw *hw = &adapter->hw; |
|
2127 struct e1000_buffer *buffer_info; |
|
2128 struct pci_dev *pdev = adapter->pdev; |
|
2129 unsigned long size; |
|
2130 unsigned int i; |
|
2131 |
|
2132 /* Free all the Rx ring sk_buffs */ |
|
2133 for (i = 0; i < rx_ring->count; i++) { |
|
2134 buffer_info = &rx_ring->buffer_info[i]; |
|
2135 if (buffer_info->dma && |
|
2136 adapter->clean_rx == e1000_clean_rx_irq) { |
|
2137 dma_unmap_single(&pdev->dev, buffer_info->dma, |
|
2138 buffer_info->length, |
|
2139 DMA_FROM_DEVICE); |
|
2140 } else if (buffer_info->dma && |
|
2141 adapter->clean_rx == e1000_clean_jumbo_rx_irq) { |
|
2142 dma_unmap_page(&pdev->dev, buffer_info->dma, |
|
2143 buffer_info->length, |
|
2144 DMA_FROM_DEVICE); |
|
2145 } |
|
2146 |
|
2147 buffer_info->dma = 0; |
|
2148 if (buffer_info->page) { |
|
2149 put_page(buffer_info->page); |
|
2150 buffer_info->page = NULL; |
|
2151 } |
|
2152 if (buffer_info->skb) { |
|
2153 dev_kfree_skb(buffer_info->skb); |
|
2154 buffer_info->skb = NULL; |
|
2155 } |
|
2156 } |
|
2157 |
|
2158 /* there also may be some cached data from a chained receive */ |
|
2159 if (rx_ring->rx_skb_top) { |
|
2160 dev_kfree_skb(rx_ring->rx_skb_top); |
|
2161 rx_ring->rx_skb_top = NULL; |
|
2162 } |
|
2163 |
|
2164 size = sizeof(struct e1000_buffer) * rx_ring->count; |
|
2165 memset(rx_ring->buffer_info, 0, size); |
|
2166 |
|
2167 /* Zero out the descriptor ring */ |
|
2168 memset(rx_ring->desc, 0, rx_ring->size); |
|
2169 |
|
2170 rx_ring->next_to_clean = 0; |
|
2171 rx_ring->next_to_use = 0; |
|
2172 |
|
2173 writel(0, hw->hw_addr + rx_ring->rdh); |
|
2174 writel(0, hw->hw_addr + rx_ring->rdt); |
|
2175 } |
|
2176 |
|
2177 /** |
|
2178 * e1000_clean_all_rx_rings - Free Rx Buffers for all queues |
|
2179 * @adapter: board private structure |
|
2180 **/ |
|
2181 static void e1000_clean_all_rx_rings(struct e1000_adapter *adapter) |
|
2182 { |
|
2183 int i; |
|
2184 |
|
2185 for (i = 0; i < adapter->num_rx_queues; i++) |
|
2186 e1000_clean_rx_ring(adapter, &adapter->rx_ring[i]); |
|
2187 } |
|
2188 |
|
2189 /* The 82542 2.0 (revision 2) needs to have the receive unit in reset |
|
2190 * and memory write and invalidate disabled for certain operations |
|
2191 */ |
|
2192 static void e1000_enter_82542_rst(struct e1000_adapter *adapter) |
|
2193 { |
|
2194 struct e1000_hw *hw = &adapter->hw; |
|
2195 struct net_device *netdev = adapter->netdev; |
|
2196 u32 rctl; |
|
2197 |
|
2198 e1000_pci_clear_mwi(hw); |
|
2199 |
|
2200 rctl = er32(RCTL); |
|
2201 rctl |= E1000_RCTL_RST; |
|
2202 ew32(RCTL, rctl); |
|
2203 E1000_WRITE_FLUSH(); |
|
2204 mdelay(5); |
|
2205 |
|
2206 if (!adapter->ecdev && netif_running(netdev)) |
|
2207 e1000_clean_all_rx_rings(adapter); |
|
2208 } |
|
2209 |
|
2210 static void e1000_leave_82542_rst(struct e1000_adapter *adapter) |
|
2211 { |
|
2212 struct e1000_hw *hw = &adapter->hw; |
|
2213 struct net_device *netdev = adapter->netdev; |
|
2214 u32 rctl; |
|
2215 |
|
2216 rctl = er32(RCTL); |
|
2217 rctl &= ~E1000_RCTL_RST; |
|
2218 ew32(RCTL, rctl); |
|
2219 E1000_WRITE_FLUSH(); |
|
2220 mdelay(5); |
|
2221 |
|
2222 if (hw->pci_cmd_word & PCI_COMMAND_INVALIDATE) |
|
2223 e1000_pci_set_mwi(hw); |
|
2224 |
|
2225 if (!adapter->netdev && netif_running(netdev)) { |
|
2226 /* No need to loop, because 82542 supports only 1 queue */ |
|
2227 struct e1000_rx_ring *ring = &adapter->rx_ring[0]; |
|
2228 e1000_configure_rx(adapter); |
|
2229 if (adapter->ecdev) { |
|
2230 /* fill rx ring completely! */ |
|
2231 adapter->alloc_rx_buf(adapter, ring, ring->count); |
|
2232 } else { |
|
2233 /* this one leaves the last ring element unallocated! */ |
|
2234 adapter->alloc_rx_buf(adapter, ring, E1000_DESC_UNUSED(ring)); |
|
2235 } |
|
2236 |
|
2237 } |
|
2238 } |
|
2239 |
|
2240 /** |
|
2241 * e1000_set_mac - Change the Ethernet Address of the NIC |
|
2242 * @netdev: network interface device structure |
|
2243 * @p: pointer to an address structure |
|
2244 * |
|
2245 * Returns 0 on success, negative on failure |
|
2246 **/ |
|
2247 static int e1000_set_mac(struct net_device *netdev, void *p) |
|
2248 { |
|
2249 struct e1000_adapter *adapter = netdev_priv(netdev); |
|
2250 struct e1000_hw *hw = &adapter->hw; |
|
2251 struct sockaddr *addr = p; |
|
2252 |
|
2253 if (!is_valid_ether_addr(addr->sa_data)) |
|
2254 return -EADDRNOTAVAIL; |
|
2255 |
|
2256 /* 82542 2.0 needs to be in reset to write receive address registers */ |
|
2257 |
|
2258 if (hw->mac_type == e1000_82542_rev2_0) |
|
2259 e1000_enter_82542_rst(adapter); |
|
2260 |
|
2261 memcpy(netdev->dev_addr, addr->sa_data, netdev->addr_len); |
|
2262 memcpy(hw->mac_addr, addr->sa_data, netdev->addr_len); |
|
2263 |
|
2264 e1000_rar_set(hw, hw->mac_addr, 0); |
|
2265 |
|
2266 if (hw->mac_type == e1000_82542_rev2_0) |
|
2267 e1000_leave_82542_rst(adapter); |
|
2268 |
|
2269 return 0; |
|
2270 } |
|
2271 |
|
2272 /** |
|
2273 * e1000_set_rx_mode - Secondary Unicast, Multicast and Promiscuous mode set |
|
2274 * @netdev: network interface device structure |
|
2275 * |
|
2276 * The set_rx_mode entry point is called whenever the unicast or multicast |
|
2277 * address lists or the network interface flags are updated. This routine is |
|
2278 * responsible for configuring the hardware for proper unicast, multicast, |
|
2279 * promiscuous mode, and all-multi behavior. |
|
2280 **/ |
|
2281 static void e1000_set_rx_mode(struct net_device *netdev) |
|
2282 { |
|
2283 struct e1000_adapter *adapter = netdev_priv(netdev); |
|
2284 struct e1000_hw *hw = &adapter->hw; |
|
2285 struct netdev_hw_addr *ha; |
|
2286 bool use_uc = false; |
|
2287 u32 rctl; |
|
2288 u32 hash_value; |
|
2289 int i, rar_entries = E1000_RAR_ENTRIES; |
|
2290 int mta_reg_count = E1000_NUM_MTA_REGISTERS; |
|
2291 u32 *mcarray = kcalloc(mta_reg_count, sizeof(u32), GFP_ATOMIC); |
|
2292 |
|
2293 if (!mcarray) |
|
2294 return; |
|
2295 |
|
2296 /* Check for Promiscuous and All Multicast modes */ |
|
2297 |
|
2298 rctl = er32(RCTL); |
|
2299 |
|
2300 if (netdev->flags & IFF_PROMISC) { |
|
2301 rctl |= (E1000_RCTL_UPE | E1000_RCTL_MPE); |
|
2302 rctl &= ~E1000_RCTL_VFE; |
|
2303 } else { |
|
2304 if (netdev->flags & IFF_ALLMULTI) |
|
2305 rctl |= E1000_RCTL_MPE; |
|
2306 else |
|
2307 rctl &= ~E1000_RCTL_MPE; |
|
2308 /* Enable VLAN filter if there is a VLAN */ |
|
2309 if (e1000_vlan_used(adapter)) |
|
2310 rctl |= E1000_RCTL_VFE; |
|
2311 } |
|
2312 |
|
2313 if (netdev_uc_count(netdev) > rar_entries - 1) { |
|
2314 rctl |= E1000_RCTL_UPE; |
|
2315 } else if (!(netdev->flags & IFF_PROMISC)) { |
|
2316 rctl &= ~E1000_RCTL_UPE; |
|
2317 use_uc = true; |
|
2318 } |
|
2319 |
|
2320 ew32(RCTL, rctl); |
|
2321 |
|
2322 /* 82542 2.0 needs to be in reset to write receive address registers */ |
|
2323 |
|
2324 if (hw->mac_type == e1000_82542_rev2_0) |
|
2325 e1000_enter_82542_rst(adapter); |
|
2326 |
|
2327 /* load the first 14 addresses into the exact filters 1-14. Unicast |
|
2328 * addresses take precedence to avoid disabling unicast filtering |
|
2329 * when possible. |
|
2330 * |
|
2331 * RAR 0 is used for the station MAC address |
|
2332 * if there are not 14 addresses, go ahead and clear the filters |
|
2333 */ |
|
2334 i = 1; |
|
2335 if (use_uc) |
|
2336 netdev_for_each_uc_addr(ha, netdev) { |
|
2337 if (i == rar_entries) |
|
2338 break; |
|
2339 e1000_rar_set(hw, ha->addr, i++); |
|
2340 } |
|
2341 |
|
2342 netdev_for_each_mc_addr(ha, netdev) { |
|
2343 if (i == rar_entries) { |
|
2344 /* load any remaining addresses into the hash table */ |
|
2345 u32 hash_reg, hash_bit, mta; |
|
2346 hash_value = e1000_hash_mc_addr(hw, ha->addr); |
|
2347 hash_reg = (hash_value >> 5) & 0x7F; |
|
2348 hash_bit = hash_value & 0x1F; |
|
2349 mta = (1 << hash_bit); |
|
2350 mcarray[hash_reg] |= mta; |
|
2351 } else { |
|
2352 e1000_rar_set(hw, ha->addr, i++); |
|
2353 } |
|
2354 } |
|
2355 |
|
2356 for (; i < rar_entries; i++) { |
|
2357 E1000_WRITE_REG_ARRAY(hw, RA, i << 1, 0); |
|
2358 E1000_WRITE_FLUSH(); |
|
2359 E1000_WRITE_REG_ARRAY(hw, RA, (i << 1) + 1, 0); |
|
2360 E1000_WRITE_FLUSH(); |
|
2361 } |
|
2362 |
|
2363 /* write the hash table completely, write from bottom to avoid |
|
2364 * both stupid write combining chipsets, and flushing each write |
|
2365 */ |
|
2366 for (i = mta_reg_count - 1; i >= 0 ; i--) { |
|
2367 /* If we are on an 82544 has an errata where writing odd |
|
2368 * offsets overwrites the previous even offset, but writing |
|
2369 * backwards over the range solves the issue by always |
|
2370 * writing the odd offset first |
|
2371 */ |
|
2372 E1000_WRITE_REG_ARRAY(hw, MTA, i, mcarray[i]); |
|
2373 } |
|
2374 E1000_WRITE_FLUSH(); |
|
2375 |
|
2376 if (hw->mac_type == e1000_82542_rev2_0) |
|
2377 e1000_leave_82542_rst(adapter); |
|
2378 |
|
2379 kfree(mcarray); |
|
2380 } |
|
2381 |
|
2382 /** |
|
2383 * e1000_update_phy_info_task - get phy info |
|
2384 * @work: work struct contained inside adapter struct |
|
2385 * |
|
2386 * Need to wait a few seconds after link up to get diagnostic information from |
|
2387 * the phy |
|
2388 */ |
|
2389 static void e1000_update_phy_info_task(struct work_struct *work) |
|
2390 { |
|
2391 struct e1000_adapter *adapter = container_of(work, |
|
2392 struct e1000_adapter, |
|
2393 phy_info_task.work); |
|
2394 |
|
2395 e1000_phy_get_info(&adapter->hw, &adapter->phy_info); |
|
2396 } |
|
2397 |
|
2398 /** |
|
2399 * e1000_82547_tx_fifo_stall_task - task to complete work |
|
2400 * @work: work struct contained inside adapter struct |
|
2401 **/ |
|
2402 static void e1000_82547_tx_fifo_stall_task(struct work_struct *work) |
|
2403 { |
|
2404 struct e1000_adapter *adapter = container_of(work, |
|
2405 struct e1000_adapter, |
|
2406 fifo_stall_task.work); |
|
2407 struct e1000_hw *hw = &adapter->hw; |
|
2408 struct net_device *netdev = adapter->netdev; |
|
2409 u32 tctl; |
|
2410 |
|
2411 if (atomic_read(&adapter->tx_fifo_stall)) { |
|
2412 if ((er32(TDT) == er32(TDH)) && |
|
2413 (er32(TDFT) == er32(TDFH)) && |
|
2414 (er32(TDFTS) == er32(TDFHS))) { |
|
2415 tctl = er32(TCTL); |
|
2416 ew32(TCTL, tctl & ~E1000_TCTL_EN); |
|
2417 ew32(TDFT, adapter->tx_head_addr); |
|
2418 ew32(TDFH, adapter->tx_head_addr); |
|
2419 ew32(TDFTS, adapter->tx_head_addr); |
|
2420 ew32(TDFHS, adapter->tx_head_addr); |
|
2421 ew32(TCTL, tctl); |
|
2422 E1000_WRITE_FLUSH(); |
|
2423 |
|
2424 adapter->tx_fifo_head = 0; |
|
2425 atomic_set(&adapter->tx_fifo_stall, 0); |
|
2426 netif_wake_queue(netdev); |
|
2427 } else if (!test_bit(__E1000_DOWN, &adapter->flags)) { |
|
2428 schedule_delayed_work(&adapter->fifo_stall_task, 1); |
|
2429 } |
|
2430 } |
|
2431 } |
|
2432 |
|
2433 bool e1000_has_link(struct e1000_adapter *adapter) |
|
2434 { |
|
2435 struct e1000_hw *hw = &adapter->hw; |
|
2436 bool link_active = false; |
|
2437 |
|
2438 /* get_link_status is set on LSC (link status) interrupt or rx |
|
2439 * sequence error interrupt (except on intel ce4100). |
|
2440 * get_link_status will stay false until the |
|
2441 * e1000_check_for_link establishes link for copper adapters |
|
2442 * ONLY |
|
2443 */ |
|
2444 switch (hw->media_type) { |
|
2445 case e1000_media_type_copper: |
|
2446 if (hw->mac_type == e1000_ce4100) |
|
2447 hw->get_link_status = 1; |
|
2448 if (hw->get_link_status) { |
|
2449 e1000_check_for_link(hw); |
|
2450 link_active = !hw->get_link_status; |
|
2451 } else { |
|
2452 link_active = true; |
|
2453 } |
|
2454 break; |
|
2455 case e1000_media_type_fiber: |
|
2456 e1000_check_for_link(hw); |
|
2457 link_active = !!(er32(STATUS) & E1000_STATUS_LU); |
|
2458 break; |
|
2459 case e1000_media_type_internal_serdes: |
|
2460 e1000_check_for_link(hw); |
|
2461 link_active = hw->serdes_has_link; |
|
2462 break; |
|
2463 default: |
|
2464 break; |
|
2465 } |
|
2466 |
|
2467 return link_active; |
|
2468 } |
|
2469 |
|
2470 /** |
|
2471 * e1000_watchdog - work function |
|
2472 * @work: work struct contained inside adapter struct |
|
2473 **/ |
|
2474 static void e1000_watchdog(struct work_struct *work) |
|
2475 { |
|
2476 struct e1000_adapter *adapter = container_of(work, |
|
2477 struct e1000_adapter, |
|
2478 watchdog_task.work); |
|
2479 struct e1000_hw *hw = &adapter->hw; |
|
2480 struct net_device *netdev = adapter->netdev; |
|
2481 struct e1000_tx_ring *txdr = adapter->tx_ring; |
|
2482 u32 link, tctl; |
|
2483 |
|
2484 link = e1000_has_link(adapter); |
|
2485 if (!adapter->ecdev && (netif_carrier_ok(netdev)) && link) |
|
2486 goto link_up; |
|
2487 |
|
2488 if (link) { |
|
2489 if ((adapter->ecdev && !ecdev_get_link(adapter->ecdev)) |
|
2490 || (!adapter->ecdev && !netif_carrier_ok(netdev))) { |
|
2491 u32 ctrl; |
|
2492 bool txb2b __attribute__ ((unused)) = true; |
|
2493 /* update snapshot of PHY registers on LSC */ |
|
2494 e1000_get_speed_and_duplex(hw, |
|
2495 &adapter->link_speed, |
|
2496 &adapter->link_duplex); |
|
2497 |
|
2498 ctrl = er32(CTRL); |
|
2499 pr_info("%s NIC Link is Up %d Mbps %s, " |
|
2500 "Flow Control: %s\n", |
|
2501 netdev->name, |
|
2502 adapter->link_speed, |
|
2503 adapter->link_duplex == FULL_DUPLEX ? |
|
2504 "Full Duplex" : "Half Duplex", |
|
2505 ((ctrl & E1000_CTRL_TFCE) && (ctrl & |
|
2506 E1000_CTRL_RFCE)) ? "RX/TX" : ((ctrl & |
|
2507 E1000_CTRL_RFCE) ? "RX" : ((ctrl & |
|
2508 E1000_CTRL_TFCE) ? "TX" : "None"))); |
|
2509 |
|
2510 /* adjust timeout factor according to speed/duplex */ |
|
2511 adapter->tx_timeout_factor = 1; |
|
2512 switch (adapter->link_speed) { |
|
2513 case SPEED_10: |
|
2514 txb2b = false; |
|
2515 adapter->tx_timeout_factor = 16; |
|
2516 break; |
|
2517 case SPEED_100: |
|
2518 txb2b = false; |
|
2519 /* maybe add some timeout factor ? */ |
|
2520 break; |
|
2521 } |
|
2522 |
|
2523 /* enable transmits in the hardware */ |
|
2524 tctl = er32(TCTL); |
|
2525 tctl |= E1000_TCTL_EN; |
|
2526 ew32(TCTL, tctl); |
|
2527 |
|
2528 if (adapter->ecdev) { |
|
2529 ecdev_set_link(adapter->ecdev, 1); |
|
2530 } |
|
2531 else { |
|
2532 netif_carrier_on(netdev); |
|
2533 if (!test_bit(__E1000_DOWN, &adapter->flags)) |
|
2534 schedule_delayed_work(&adapter->phy_info_task, |
|
2535 2 * HZ); |
|
2536 } |
|
2537 adapter->smartspeed = 0; |
|
2538 } |
|
2539 } else { |
|
2540 if ((adapter->ecdev && ecdev_get_link(adapter->ecdev)) |
|
2541 || (!adapter->ecdev && netif_carrier_ok(netdev))) { |
|
2542 adapter->link_speed = 0; |
|
2543 adapter->link_duplex = 0; |
|
2544 pr_info("%s NIC Link is Down\n", |
|
2545 netdev->name); |
|
2546 |
|
2547 if (adapter->ecdev) { |
|
2548 ecdev_set_link(adapter->ecdev, 0); |
|
2549 } else { |
|
2550 netif_carrier_off(netdev); |
|
2551 |
|
2552 if (!test_bit(__E1000_DOWN, &adapter->flags)) |
|
2553 schedule_delayed_work(&adapter->phy_info_task, |
|
2554 2 * HZ); |
|
2555 } |
|
2556 } |
|
2557 |
|
2558 e1000_smartspeed(adapter); |
|
2559 } |
|
2560 |
|
2561 link_up: |
|
2562 e1000_update_stats(adapter); |
|
2563 |
|
2564 hw->tx_packet_delta = adapter->stats.tpt - adapter->tpt_old; |
|
2565 adapter->tpt_old = adapter->stats.tpt; |
|
2566 hw->collision_delta = adapter->stats.colc - adapter->colc_old; |
|
2567 adapter->colc_old = adapter->stats.colc; |
|
2568 |
|
2569 adapter->gorcl = adapter->stats.gorcl - adapter->gorcl_old; |
|
2570 adapter->gorcl_old = adapter->stats.gorcl; |
|
2571 adapter->gotcl = adapter->stats.gotcl - adapter->gotcl_old; |
|
2572 adapter->gotcl_old = adapter->stats.gotcl; |
|
2573 |
|
2574 e1000_update_adaptive(hw); |
|
2575 |
|
2576 if (!adapter->ecdev && !netif_carrier_ok(netdev)) { |
|
2577 if (E1000_DESC_UNUSED(txdr) + 1 < txdr->count) { |
|
2578 /* We've lost link, so the controller stops DMA, |
|
2579 * but we've got queued Tx work that's never going |
|
2580 * to get done, so reset controller to flush Tx. |
|
2581 * (Do the reset outside of interrupt context). |
|
2582 */ |
|
2583 adapter->tx_timeout_count++; |
|
2584 schedule_work(&adapter->reset_task); |
|
2585 /* exit immediately since reset is imminent */ |
|
2586 return; |
|
2587 } |
|
2588 } |
|
2589 |
|
2590 /* Simple mode for Interrupt Throttle Rate (ITR) */ |
|
2591 if (hw->mac_type >= e1000_82540 && adapter->itr_setting == 4) { |
|
2592 /* Symmetric Tx/Rx gets a reduced ITR=2000; |
|
2593 * Total asymmetrical Tx or Rx gets ITR=8000; |
|
2594 * everyone else is between 2000-8000. |
|
2595 */ |
|
2596 u32 goc = (adapter->gotcl + adapter->gorcl) / 10000; |
|
2597 u32 dif = (adapter->gotcl > adapter->gorcl ? |
|
2598 adapter->gotcl - adapter->gorcl : |
|
2599 adapter->gorcl - adapter->gotcl) / 10000; |
|
2600 u32 itr = goc > 0 ? (dif * 6000 / goc + 2000) : 8000; |
|
2601 |
|
2602 ew32(ITR, 1000000000 / (itr * 256)); |
|
2603 } |
|
2604 |
|
2605 /* Cause software interrupt to ensure rx ring is cleaned */ |
|
2606 ew32(ICS, E1000_ICS_RXDMT0); |
|
2607 |
|
2608 /* Force detection of hung controller every watchdog period */ |
|
2609 adapter->detect_tx_hung = true; |
|
2610 |
|
2611 /* Reschedule the task */ |
|
2612 if (!adapter->ecdev && !test_bit(__E1000_DOWN, &adapter->flags)) |
|
2613 schedule_delayed_work(&adapter->watchdog_task, 2 * HZ); |
|
2614 } |
|
2615 |
|
2616 enum latency_range { |
|
2617 lowest_latency = 0, |
|
2618 low_latency = 1, |
|
2619 bulk_latency = 2, |
|
2620 latency_invalid = 255 |
|
2621 }; |
|
2622 |
|
2623 /** |
|
2624 * e1000_update_itr - update the dynamic ITR value based on statistics |
|
2625 * @adapter: pointer to adapter |
|
2626 * @itr_setting: current adapter->itr |
|
2627 * @packets: the number of packets during this measurement interval |
|
2628 * @bytes: the number of bytes during this measurement interval |
|
2629 * |
|
2630 * Stores a new ITR value based on packets and byte |
|
2631 * counts during the last interrupt. The advantage of per interrupt |
|
2632 * computation is faster updates and more accurate ITR for the current |
|
2633 * traffic pattern. Constants in this function were computed |
|
2634 * based on theoretical maximum wire speed and thresholds were set based |
|
2635 * on testing data as well as attempting to minimize response time |
|
2636 * while increasing bulk throughput. |
|
2637 * this functionality is controlled by the InterruptThrottleRate module |
|
2638 * parameter (see e1000_param.c) |
|
2639 **/ |
|
2640 static unsigned int e1000_update_itr(struct e1000_adapter *adapter, |
|
2641 u16 itr_setting, int packets, int bytes) |
|
2642 { |
|
2643 unsigned int retval = itr_setting; |
|
2644 struct e1000_hw *hw = &adapter->hw; |
|
2645 |
|
2646 if (unlikely(hw->mac_type < e1000_82540)) |
|
2647 goto update_itr_done; |
|
2648 |
|
2649 if (packets == 0) |
|
2650 goto update_itr_done; |
|
2651 |
|
2652 switch (itr_setting) { |
|
2653 case lowest_latency: |
|
2654 /* jumbo frames get bulk treatment*/ |
|
2655 if (bytes/packets > 8000) |
|
2656 retval = bulk_latency; |
|
2657 else if ((packets < 5) && (bytes > 512)) |
|
2658 retval = low_latency; |
|
2659 break; |
|
2660 case low_latency: /* 50 usec aka 20000 ints/s */ |
|
2661 if (bytes > 10000) { |
|
2662 /* jumbo frames need bulk latency setting */ |
|
2663 if (bytes/packets > 8000) |
|
2664 retval = bulk_latency; |
|
2665 else if ((packets < 10) || ((bytes/packets) > 1200)) |
|
2666 retval = bulk_latency; |
|
2667 else if ((packets > 35)) |
|
2668 retval = lowest_latency; |
|
2669 } else if (bytes/packets > 2000) |
|
2670 retval = bulk_latency; |
|
2671 else if (packets <= 2 && bytes < 512) |
|
2672 retval = lowest_latency; |
|
2673 break; |
|
2674 case bulk_latency: /* 250 usec aka 4000 ints/s */ |
|
2675 if (bytes > 25000) { |
|
2676 if (packets > 35) |
|
2677 retval = low_latency; |
|
2678 } else if (bytes < 6000) { |
|
2679 retval = low_latency; |
|
2680 } |
|
2681 break; |
|
2682 } |
|
2683 |
|
2684 update_itr_done: |
|
2685 return retval; |
|
2686 } |
|
2687 |
|
2688 static void e1000_set_itr(struct e1000_adapter *adapter) |
|
2689 { |
|
2690 struct e1000_hw *hw = &adapter->hw; |
|
2691 u16 current_itr; |
|
2692 u32 new_itr = adapter->itr; |
|
2693 |
|
2694 if (unlikely(hw->mac_type < e1000_82540)) |
|
2695 return; |
|
2696 |
|
2697 /* for non-gigabit speeds, just fix the interrupt rate at 4000 */ |
|
2698 if (unlikely(adapter->link_speed != SPEED_1000)) { |
|
2699 current_itr = 0; |
|
2700 new_itr = 4000; |
|
2701 goto set_itr_now; |
|
2702 } |
|
2703 |
|
2704 adapter->tx_itr = e1000_update_itr(adapter, adapter->tx_itr, |
|
2705 adapter->total_tx_packets, |
|
2706 adapter->total_tx_bytes); |
|
2707 /* conservative mode (itr 3) eliminates the lowest_latency setting */ |
|
2708 if (adapter->itr_setting == 3 && adapter->tx_itr == lowest_latency) |
|
2709 adapter->tx_itr = low_latency; |
|
2710 |
|
2711 adapter->rx_itr = e1000_update_itr(adapter, adapter->rx_itr, |
|
2712 adapter->total_rx_packets, |
|
2713 adapter->total_rx_bytes); |
|
2714 /* conservative mode (itr 3) eliminates the lowest_latency setting */ |
|
2715 if (adapter->itr_setting == 3 && adapter->rx_itr == lowest_latency) |
|
2716 adapter->rx_itr = low_latency; |
|
2717 |
|
2718 current_itr = max(adapter->rx_itr, adapter->tx_itr); |
|
2719 |
|
2720 switch (current_itr) { |
|
2721 /* counts and packets in update_itr are dependent on these numbers */ |
|
2722 case lowest_latency: |
|
2723 new_itr = 70000; |
|
2724 break; |
|
2725 case low_latency: |
|
2726 new_itr = 20000; /* aka hwitr = ~200 */ |
|
2727 break; |
|
2728 case bulk_latency: |
|
2729 new_itr = 4000; |
|
2730 break; |
|
2731 default: |
|
2732 break; |
|
2733 } |
|
2734 |
|
2735 set_itr_now: |
|
2736 if (new_itr != adapter->itr) { |
|
2737 /* this attempts to bias the interrupt rate towards Bulk |
|
2738 * by adding intermediate steps when interrupt rate is |
|
2739 * increasing |
|
2740 */ |
|
2741 new_itr = new_itr > adapter->itr ? |
|
2742 min(adapter->itr + (new_itr >> 2), new_itr) : |
|
2743 new_itr; |
|
2744 adapter->itr = new_itr; |
|
2745 ew32(ITR, 1000000000 / (new_itr * 256)); |
|
2746 } |
|
2747 } |
|
2748 |
|
2749 #define E1000_TX_FLAGS_CSUM 0x00000001 |
|
2750 #define E1000_TX_FLAGS_VLAN 0x00000002 |
|
2751 #define E1000_TX_FLAGS_TSO 0x00000004 |
|
2752 #define E1000_TX_FLAGS_IPV4 0x00000008 |
|
2753 #define E1000_TX_FLAGS_NO_FCS 0x00000010 |
|
2754 #define E1000_TX_FLAGS_VLAN_MASK 0xffff0000 |
|
2755 #define E1000_TX_FLAGS_VLAN_SHIFT 16 |
|
2756 |
|
2757 static int e1000_tso(struct e1000_adapter *adapter, |
|
2758 struct e1000_tx_ring *tx_ring, struct sk_buff *skb) |
|
2759 { |
|
2760 struct e1000_context_desc *context_desc; |
|
2761 struct e1000_buffer *buffer_info; |
|
2762 unsigned int i; |
|
2763 u32 cmd_length = 0; |
|
2764 u16 ipcse = 0, tucse, mss; |
|
2765 u8 ipcss, ipcso, tucss, tucso, hdr_len; |
|
2766 |
|
2767 if (skb_is_gso(skb)) { |
|
2768 int err; |
|
2769 |
|
2770 err = skb_cow_head(skb, 0); |
|
2771 if (err < 0) |
|
2772 return err; |
|
2773 |
|
2774 hdr_len = skb_transport_offset(skb) + tcp_hdrlen(skb); |
|
2775 mss = skb_shinfo(skb)->gso_size; |
|
2776 if (skb->protocol == htons(ETH_P_IP)) { |
|
2777 struct iphdr *iph = ip_hdr(skb); |
|
2778 iph->tot_len = 0; |
|
2779 iph->check = 0; |
|
2780 tcp_hdr(skb)->check = ~csum_tcpudp_magic(iph->saddr, |
|
2781 iph->daddr, 0, |
|
2782 IPPROTO_TCP, |
|
2783 0); |
|
2784 cmd_length = E1000_TXD_CMD_IP; |
|
2785 ipcse = skb_transport_offset(skb) - 1; |
|
2786 } else if (skb->protocol == htons(ETH_P_IPV6)) { |
|
2787 ipv6_hdr(skb)->payload_len = 0; |
|
2788 tcp_hdr(skb)->check = |
|
2789 ~csum_ipv6_magic(&ipv6_hdr(skb)->saddr, |
|
2790 &ipv6_hdr(skb)->daddr, |
|
2791 0, IPPROTO_TCP, 0); |
|
2792 ipcse = 0; |
|
2793 } |
|
2794 ipcss = skb_network_offset(skb); |
|
2795 ipcso = (void *)&(ip_hdr(skb)->check) - (void *)skb->data; |
|
2796 tucss = skb_transport_offset(skb); |
|
2797 tucso = (void *)&(tcp_hdr(skb)->check) - (void *)skb->data; |
|
2798 tucse = 0; |
|
2799 |
|
2800 cmd_length |= (E1000_TXD_CMD_DEXT | E1000_TXD_CMD_TSE | |
|
2801 E1000_TXD_CMD_TCP | (skb->len - (hdr_len))); |
|
2802 |
|
2803 i = tx_ring->next_to_use; |
|
2804 context_desc = E1000_CONTEXT_DESC(*tx_ring, i); |
|
2805 buffer_info = &tx_ring->buffer_info[i]; |
|
2806 |
|
2807 context_desc->lower_setup.ip_fields.ipcss = ipcss; |
|
2808 context_desc->lower_setup.ip_fields.ipcso = ipcso; |
|
2809 context_desc->lower_setup.ip_fields.ipcse = cpu_to_le16(ipcse); |
|
2810 context_desc->upper_setup.tcp_fields.tucss = tucss; |
|
2811 context_desc->upper_setup.tcp_fields.tucso = tucso; |
|
2812 context_desc->upper_setup.tcp_fields.tucse = cpu_to_le16(tucse); |
|
2813 context_desc->tcp_seg_setup.fields.mss = cpu_to_le16(mss); |
|
2814 context_desc->tcp_seg_setup.fields.hdr_len = hdr_len; |
|
2815 context_desc->cmd_and_length = cpu_to_le32(cmd_length); |
|
2816 |
|
2817 buffer_info->time_stamp = jiffies; |
|
2818 buffer_info->next_to_watch = i; |
|
2819 |
|
2820 if (++i == tx_ring->count) i = 0; |
|
2821 tx_ring->next_to_use = i; |
|
2822 |
|
2823 return true; |
|
2824 } |
|
2825 return false; |
|
2826 } |
|
2827 |
|
2828 static bool e1000_tx_csum(struct e1000_adapter *adapter, |
|
2829 struct e1000_tx_ring *tx_ring, struct sk_buff *skb) |
|
2830 { |
|
2831 struct e1000_context_desc *context_desc; |
|
2832 struct e1000_buffer *buffer_info; |
|
2833 unsigned int i; |
|
2834 u8 css; |
|
2835 u32 cmd_len = E1000_TXD_CMD_DEXT; |
|
2836 |
|
2837 if (skb->ip_summed != CHECKSUM_PARTIAL) |
|
2838 return false; |
|
2839 |
|
2840 switch (skb->protocol) { |
|
2841 case cpu_to_be16(ETH_P_IP): |
|
2842 if (ip_hdr(skb)->protocol == IPPROTO_TCP) |
|
2843 cmd_len |= E1000_TXD_CMD_TCP; |
|
2844 break; |
|
2845 case cpu_to_be16(ETH_P_IPV6): |
|
2846 /* XXX not handling all IPV6 headers */ |
|
2847 if (ipv6_hdr(skb)->nexthdr == IPPROTO_TCP) |
|
2848 cmd_len |= E1000_TXD_CMD_TCP; |
|
2849 break; |
|
2850 default: |
|
2851 if (unlikely(net_ratelimit())) |
|
2852 e_warn(drv, "checksum_partial proto=%x!\n", |
|
2853 skb->protocol); |
|
2854 break; |
|
2855 } |
|
2856 |
|
2857 css = skb_checksum_start_offset(skb); |
|
2858 |
|
2859 i = tx_ring->next_to_use; |
|
2860 buffer_info = &tx_ring->buffer_info[i]; |
|
2861 context_desc = E1000_CONTEXT_DESC(*tx_ring, i); |
|
2862 |
|
2863 context_desc->lower_setup.ip_config = 0; |
|
2864 context_desc->upper_setup.tcp_fields.tucss = css; |
|
2865 context_desc->upper_setup.tcp_fields.tucso = |
|
2866 css + skb->csum_offset; |
|
2867 context_desc->upper_setup.tcp_fields.tucse = 0; |
|
2868 context_desc->tcp_seg_setup.data = 0; |
|
2869 context_desc->cmd_and_length = cpu_to_le32(cmd_len); |
|
2870 |
|
2871 buffer_info->time_stamp = jiffies; |
|
2872 buffer_info->next_to_watch = i; |
|
2873 |
|
2874 if (unlikely(++i == tx_ring->count)) i = 0; |
|
2875 tx_ring->next_to_use = i; |
|
2876 |
|
2877 return true; |
|
2878 } |
|
2879 |
|
2880 #define E1000_MAX_TXD_PWR 12 |
|
2881 #define E1000_MAX_DATA_PER_TXD (1<<E1000_MAX_TXD_PWR) |
|
2882 |
|
2883 static int e1000_tx_map(struct e1000_adapter *adapter, |
|
2884 struct e1000_tx_ring *tx_ring, |
|
2885 struct sk_buff *skb, unsigned int first, |
|
2886 unsigned int max_per_txd, unsigned int nr_frags, |
|
2887 unsigned int mss) |
|
2888 { |
|
2889 struct e1000_hw *hw = &adapter->hw; |
|
2890 struct pci_dev *pdev = adapter->pdev; |
|
2891 struct e1000_buffer *buffer_info; |
|
2892 unsigned int len = skb_headlen(skb); |
|
2893 unsigned int offset = 0, size, count = 0, i; |
|
2894 unsigned int f, bytecount, segs; |
|
2895 |
|
2896 i = tx_ring->next_to_use; |
|
2897 |
|
2898 while (len) { |
|
2899 buffer_info = &tx_ring->buffer_info[i]; |
|
2900 size = min(len, max_per_txd); |
|
2901 /* Workaround for Controller erratum -- |
|
2902 * descriptor for non-tso packet in a linear SKB that follows a |
|
2903 * tso gets written back prematurely before the data is fully |
|
2904 * DMA'd to the controller |
|
2905 */ |
|
2906 if (!skb->data_len && tx_ring->last_tx_tso && |
|
2907 !skb_is_gso(skb)) { |
|
2908 tx_ring->last_tx_tso = false; |
|
2909 size -= 4; |
|
2910 } |
|
2911 |
|
2912 /* Workaround for premature desc write-backs |
|
2913 * in TSO mode. Append 4-byte sentinel desc |
|
2914 */ |
|
2915 if (unlikely(mss && !nr_frags && size == len && size > 8)) |
|
2916 size -= 4; |
|
2917 /* work-around for errata 10 and it applies |
|
2918 * to all controllers in PCI-X mode |
|
2919 * The fix is to make sure that the first descriptor of a |
|
2920 * packet is smaller than 2048 - 16 - 16 (or 2016) bytes |
|
2921 */ |
|
2922 if (unlikely((hw->bus_type == e1000_bus_type_pcix) && |
|
2923 (size > 2015) && count == 0)) |
|
2924 size = 2015; |
|
2925 |
|
2926 /* Workaround for potential 82544 hang in PCI-X. Avoid |
|
2927 * terminating buffers within evenly-aligned dwords. |
|
2928 */ |
|
2929 if (unlikely(adapter->pcix_82544 && |
|
2930 !((unsigned long)(skb->data + offset + size - 1) & 4) && |
|
2931 size > 4)) |
|
2932 size -= 4; |
|
2933 |
|
2934 buffer_info->length = size; |
|
2935 /* set time_stamp *before* dma to help avoid a possible race */ |
|
2936 buffer_info->time_stamp = jiffies; |
|
2937 buffer_info->mapped_as_page = false; |
|
2938 buffer_info->dma = dma_map_single(&pdev->dev, |
|
2939 skb->data + offset, |
|
2940 size, DMA_TO_DEVICE); |
|
2941 if (dma_mapping_error(&pdev->dev, buffer_info->dma)) |
|
2942 goto dma_error; |
|
2943 buffer_info->next_to_watch = i; |
|
2944 |
|
2945 len -= size; |
|
2946 offset += size; |
|
2947 count++; |
|
2948 if (len) { |
|
2949 i++; |
|
2950 if (unlikely(i == tx_ring->count)) |
|
2951 i = 0; |
|
2952 } |
|
2953 } |
|
2954 |
|
2955 for (f = 0; f < nr_frags; f++) { |
|
2956 const struct skb_frag_struct *frag; |
|
2957 |
|
2958 frag = &skb_shinfo(skb)->frags[f]; |
|
2959 len = skb_frag_size(frag); |
|
2960 offset = 0; |
|
2961 |
|
2962 while (len) { |
|
2963 unsigned long bufend; |
|
2964 i++; |
|
2965 if (unlikely(i == tx_ring->count)) |
|
2966 i = 0; |
|
2967 |
|
2968 buffer_info = &tx_ring->buffer_info[i]; |
|
2969 size = min(len, max_per_txd); |
|
2970 /* Workaround for premature desc write-backs |
|
2971 * in TSO mode. Append 4-byte sentinel desc |
|
2972 */ |
|
2973 if (unlikely(mss && f == (nr_frags-1) && |
|
2974 size == len && size > 8)) |
|
2975 size -= 4; |
|
2976 /* Workaround for potential 82544 hang in PCI-X. |
|
2977 * Avoid terminating buffers within evenly-aligned |
|
2978 * dwords. |
|
2979 */ |
|
2980 bufend = (unsigned long) |
|
2981 page_to_phys(skb_frag_page(frag)); |
|
2982 bufend += offset + size - 1; |
|
2983 if (unlikely(adapter->pcix_82544 && |
|
2984 !(bufend & 4) && |
|
2985 size > 4)) |
|
2986 size -= 4; |
|
2987 |
|
2988 buffer_info->length = size; |
|
2989 buffer_info->time_stamp = jiffies; |
|
2990 buffer_info->mapped_as_page = true; |
|
2991 buffer_info->dma = skb_frag_dma_map(&pdev->dev, frag, |
|
2992 offset, size, DMA_TO_DEVICE); |
|
2993 if (dma_mapping_error(&pdev->dev, buffer_info->dma)) |
|
2994 goto dma_error; |
|
2995 buffer_info->next_to_watch = i; |
|
2996 |
|
2997 len -= size; |
|
2998 offset += size; |
|
2999 count++; |
|
3000 } |
|
3001 } |
|
3002 |
|
3003 segs = skb_shinfo(skb)->gso_segs ?: 1; |
|
3004 /* multiply data chunks by size of headers */ |
|
3005 bytecount = ((segs - 1) * skb_headlen(skb)) + skb->len; |
|
3006 |
|
3007 tx_ring->buffer_info[i].skb = skb; |
|
3008 tx_ring->buffer_info[i].segs = segs; |
|
3009 tx_ring->buffer_info[i].bytecount = bytecount; |
|
3010 tx_ring->buffer_info[first].next_to_watch = i; |
|
3011 |
|
3012 return count; |
|
3013 |
|
3014 dma_error: |
|
3015 dev_err(&pdev->dev, "TX DMA map failed\n"); |
|
3016 buffer_info->dma = 0; |
|
3017 if (count) |
|
3018 count--; |
|
3019 |
|
3020 while (count--) { |
|
3021 if (i==0) |
|
3022 i += tx_ring->count; |
|
3023 i--; |
|
3024 buffer_info = &tx_ring->buffer_info[i]; |
|
3025 e1000_unmap_and_free_tx_resource(adapter, buffer_info); |
|
3026 } |
|
3027 |
|
3028 return 0; |
|
3029 } |
|
3030 |
|
3031 static void e1000_tx_queue(struct e1000_adapter *adapter, |
|
3032 struct e1000_tx_ring *tx_ring, int tx_flags, |
|
3033 int count) |
|
3034 { |
|
3035 struct e1000_hw *hw = &adapter->hw; |
|
3036 struct e1000_tx_desc *tx_desc = NULL; |
|
3037 struct e1000_buffer *buffer_info; |
|
3038 u32 txd_upper = 0, txd_lower = E1000_TXD_CMD_IFCS; |
|
3039 unsigned int i; |
|
3040 |
|
3041 if (likely(tx_flags & E1000_TX_FLAGS_TSO)) { |
|
3042 txd_lower |= E1000_TXD_CMD_DEXT | E1000_TXD_DTYP_D | |
|
3043 E1000_TXD_CMD_TSE; |
|
3044 txd_upper |= E1000_TXD_POPTS_TXSM << 8; |
|
3045 |
|
3046 if (likely(tx_flags & E1000_TX_FLAGS_IPV4)) |
|
3047 txd_upper |= E1000_TXD_POPTS_IXSM << 8; |
|
3048 } |
|
3049 |
|
3050 if (likely(tx_flags & E1000_TX_FLAGS_CSUM)) { |
|
3051 txd_lower |= E1000_TXD_CMD_DEXT | E1000_TXD_DTYP_D; |
|
3052 txd_upper |= E1000_TXD_POPTS_TXSM << 8; |
|
3053 } |
|
3054 |
|
3055 if (unlikely(tx_flags & E1000_TX_FLAGS_VLAN)) { |
|
3056 txd_lower |= E1000_TXD_CMD_VLE; |
|
3057 txd_upper |= (tx_flags & E1000_TX_FLAGS_VLAN_MASK); |
|
3058 } |
|
3059 |
|
3060 if (unlikely(tx_flags & E1000_TX_FLAGS_NO_FCS)) |
|
3061 txd_lower &= ~(E1000_TXD_CMD_IFCS); |
|
3062 |
|
3063 i = tx_ring->next_to_use; |
|
3064 |
|
3065 while (count--) { |
|
3066 buffer_info = &tx_ring->buffer_info[i]; |
|
3067 tx_desc = E1000_TX_DESC(*tx_ring, i); |
|
3068 tx_desc->buffer_addr = cpu_to_le64(buffer_info->dma); |
|
3069 tx_desc->lower.data = |
|
3070 cpu_to_le32(txd_lower | buffer_info->length); |
|
3071 tx_desc->upper.data = cpu_to_le32(txd_upper); |
|
3072 if (unlikely(++i == tx_ring->count)) i = 0; |
|
3073 } |
|
3074 |
|
3075 tx_desc->lower.data |= cpu_to_le32(adapter->txd_cmd); |
|
3076 |
|
3077 /* txd_cmd re-enables FCS, so we'll re-disable it here as desired. */ |
|
3078 if (unlikely(tx_flags & E1000_TX_FLAGS_NO_FCS)) |
|
3079 tx_desc->lower.data &= ~(cpu_to_le32(E1000_TXD_CMD_IFCS)); |
|
3080 |
|
3081 /* Force memory writes to complete before letting h/w |
|
3082 * know there are new descriptors to fetch. (Only |
|
3083 * applicable for weak-ordered memory model archs, |
|
3084 * such as IA-64). |
|
3085 */ |
|
3086 wmb(); |
|
3087 |
|
3088 tx_ring->next_to_use = i; |
|
3089 writel(i, hw->hw_addr + tx_ring->tdt); |
|
3090 /* we need this if more than one processor can write to our tail |
|
3091 * at a time, it synchronizes IO on IA64/Altix systems |
|
3092 */ |
|
3093 mmiowb(); |
|
3094 } |
|
3095 |
|
3096 /* 82547 workaround to avoid controller hang in half-duplex environment. |
|
3097 * The workaround is to avoid queuing a large packet that would span |
|
3098 * the internal Tx FIFO ring boundary by notifying the stack to resend |
|
3099 * the packet at a later time. This gives the Tx FIFO an opportunity to |
|
3100 * flush all packets. When that occurs, we reset the Tx FIFO pointers |
|
3101 * to the beginning of the Tx FIFO. |
|
3102 */ |
|
3103 |
|
3104 #define E1000_FIFO_HDR 0x10 |
|
3105 #define E1000_82547_PAD_LEN 0x3E0 |
|
3106 |
|
3107 static int e1000_82547_fifo_workaround(struct e1000_adapter *adapter, |
|
3108 struct sk_buff *skb) |
|
3109 { |
|
3110 u32 fifo_space = adapter->tx_fifo_size - adapter->tx_fifo_head; |
|
3111 u32 skb_fifo_len = skb->len + E1000_FIFO_HDR; |
|
3112 |
|
3113 skb_fifo_len = ALIGN(skb_fifo_len, E1000_FIFO_HDR); |
|
3114 |
|
3115 if (adapter->link_duplex != HALF_DUPLEX) |
|
3116 goto no_fifo_stall_required; |
|
3117 |
|
3118 if (atomic_read(&adapter->tx_fifo_stall)) |
|
3119 return 1; |
|
3120 |
|
3121 if (skb_fifo_len >= (E1000_82547_PAD_LEN + fifo_space)) { |
|
3122 atomic_set(&adapter->tx_fifo_stall, 1); |
|
3123 return 1; |
|
3124 } |
|
3125 |
|
3126 no_fifo_stall_required: |
|
3127 adapter->tx_fifo_head += skb_fifo_len; |
|
3128 if (adapter->tx_fifo_head >= adapter->tx_fifo_size) |
|
3129 adapter->tx_fifo_head -= adapter->tx_fifo_size; |
|
3130 return 0; |
|
3131 } |
|
3132 |
|
3133 static int __e1000_maybe_stop_tx(struct net_device *netdev, int size) |
|
3134 { |
|
3135 struct e1000_adapter *adapter = netdev_priv(netdev); |
|
3136 struct e1000_tx_ring *tx_ring = adapter->tx_ring; |
|
3137 |
|
3138 if (adapter->ecdev) { |
|
3139 return -EBUSY; |
|
3140 } |
|
3141 |
|
3142 netif_stop_queue(netdev); |
|
3143 /* Herbert's original patch had: |
|
3144 * smp_mb__after_netif_stop_queue(); |
|
3145 * but since that doesn't exist yet, just open code it. |
|
3146 */ |
|
3147 smp_mb(); |
|
3148 |
|
3149 /* We need to check again in a case another CPU has just |
|
3150 * made room available. |
|
3151 */ |
|
3152 if (likely(E1000_DESC_UNUSED(tx_ring) < size)) |
|
3153 return -EBUSY; |
|
3154 |
|
3155 /* A reprieve! */ |
|
3156 netif_start_queue(netdev); |
|
3157 ++adapter->restart_queue; |
|
3158 return 0; |
|
3159 } |
|
3160 |
|
3161 static int e1000_maybe_stop_tx(struct net_device *netdev, |
|
3162 struct e1000_tx_ring *tx_ring, int size) |
|
3163 { |
|
3164 if (likely(E1000_DESC_UNUSED(tx_ring) >= size)) |
|
3165 return 0; |
|
3166 return __e1000_maybe_stop_tx(netdev, size); |
|
3167 } |
|
3168 |
|
3169 #define TXD_USE_COUNT(S, X) (((S) >> (X)) + 1 ) |
|
3170 static netdev_tx_t e1000_xmit_frame(struct sk_buff *skb, |
|
3171 struct net_device *netdev) |
|
3172 { |
|
3173 struct e1000_adapter *adapter = netdev_priv(netdev); |
|
3174 struct e1000_hw *hw = &adapter->hw; |
|
3175 struct e1000_tx_ring *tx_ring; |
|
3176 unsigned int first, max_per_txd = E1000_MAX_DATA_PER_TXD; |
|
3177 unsigned int max_txd_pwr = E1000_MAX_TXD_PWR; |
|
3178 unsigned int tx_flags = 0; |
|
3179 unsigned int len = skb_headlen(skb); |
|
3180 unsigned int nr_frags; |
|
3181 unsigned int mss; |
|
3182 int count = 0; |
|
3183 int tso; |
|
3184 unsigned int f; |
|
3185 |
|
3186 /* This goes back to the question of how to logically map a Tx queue |
|
3187 * to a flow. Right now, performance is impacted slightly negatively |
|
3188 * if using multiple Tx queues. If the stack breaks away from a |
|
3189 * single qdisc implementation, we can look at this again. |
|
3190 */ |
|
3191 tx_ring = adapter->tx_ring; |
|
3192 |
|
3193 /* On PCI/PCI-X HW, if packet size is less than ETH_ZLEN, |
|
3194 * packets may get corrupted during padding by HW. |
|
3195 * To WA this issue, pad all small packets manually. |
|
3196 */ |
|
3197 if (skb->len < ETH_ZLEN) { |
|
3198 if (skb_pad(skb, ETH_ZLEN - skb->len)) |
|
3199 return NETDEV_TX_OK; |
|
3200 skb->len = ETH_ZLEN; |
|
3201 skb_set_tail_pointer(skb, ETH_ZLEN); |
|
3202 } |
|
3203 |
|
3204 mss = skb_shinfo(skb)->gso_size; |
|
3205 /* The controller does a simple calculation to |
|
3206 * make sure there is enough room in the FIFO before |
|
3207 * initiating the DMA for each buffer. The calc is: |
|
3208 * 4 = ceil(buffer len/mss). To make sure we don't |
|
3209 * overrun the FIFO, adjust the max buffer len if mss |
|
3210 * drops. |
|
3211 */ |
|
3212 if (mss) { |
|
3213 u8 hdr_len; |
|
3214 max_per_txd = min(mss << 2, max_per_txd); |
|
3215 max_txd_pwr = fls(max_per_txd) - 1; |
|
3216 |
|
3217 hdr_len = skb_transport_offset(skb) + tcp_hdrlen(skb); |
|
3218 if (skb->data_len && hdr_len == len) { |
|
3219 switch (hw->mac_type) { |
|
3220 unsigned int pull_size; |
|
3221 case e1000_82544: |
|
3222 /* Make sure we have room to chop off 4 bytes, |
|
3223 * and that the end alignment will work out to |
|
3224 * this hardware's requirements |
|
3225 * NOTE: this is a TSO only workaround |
|
3226 * if end byte alignment not correct move us |
|
3227 * into the next dword |
|
3228 */ |
|
3229 if ((unsigned long)(skb_tail_pointer(skb) - 1) |
|
3230 & 4) |
|
3231 break; |
|
3232 /* fall through */ |
|
3233 pull_size = min((unsigned int)4, skb->data_len); |
|
3234 if (!__pskb_pull_tail(skb, pull_size)) { |
|
3235 e_err(drv, "__pskb_pull_tail " |
|
3236 "failed.\n"); |
|
3237 if (!adapter->ecdev) { |
|
3238 dev_kfree_skb_any(skb); |
|
3239 } |
|
3240 return NETDEV_TX_OK; |
|
3241 } |
|
3242 len = skb_headlen(skb); |
|
3243 break; |
|
3244 default: |
|
3245 /* do nothing */ |
|
3246 break; |
|
3247 } |
|
3248 } |
|
3249 } |
|
3250 |
|
3251 /* reserve a descriptor for the offload context */ |
|
3252 if ((mss) || (skb->ip_summed == CHECKSUM_PARTIAL)) |
|
3253 count++; |
|
3254 count++; |
|
3255 |
|
3256 /* Controller Erratum workaround */ |
|
3257 if (!skb->data_len && tx_ring->last_tx_tso && !skb_is_gso(skb)) |
|
3258 count++; |
|
3259 |
|
3260 count += TXD_USE_COUNT(len, max_txd_pwr); |
|
3261 |
|
3262 if (adapter->pcix_82544) |
|
3263 count++; |
|
3264 |
|
3265 /* work-around for errata 10 and it applies to all controllers |
|
3266 * in PCI-X mode, so add one more descriptor to the count |
|
3267 */ |
|
3268 if (unlikely((hw->bus_type == e1000_bus_type_pcix) && |
|
3269 (len > 2015))) |
|
3270 count++; |
|
3271 |
|
3272 nr_frags = skb_shinfo(skb)->nr_frags; |
|
3273 for (f = 0; f < nr_frags; f++) |
|
3274 count += TXD_USE_COUNT(skb_frag_size(&skb_shinfo(skb)->frags[f]), |
|
3275 max_txd_pwr); |
|
3276 if (adapter->pcix_82544) |
|
3277 count += nr_frags; |
|
3278 |
|
3279 /* need: count + 2 desc gap to keep tail from touching |
|
3280 * head, otherwise try next time |
|
3281 */ |
|
3282 if (unlikely(e1000_maybe_stop_tx(netdev, tx_ring, count + 2))) |
|
3283 return NETDEV_TX_BUSY; |
|
3284 |
|
3285 if (unlikely((hw->mac_type == e1000_82547) && |
|
3286 (e1000_82547_fifo_workaround(adapter, skb)))) { |
|
3287 if (!adapter->ecdev) { |
|
3288 netif_stop_queue(netdev); |
|
3289 if (!test_bit(__E1000_DOWN, &adapter->flags)) |
|
3290 schedule_delayed_work(&adapter->fifo_stall_task, 1); |
|
3291 } |
|
3292 return NETDEV_TX_BUSY; |
|
3293 } |
|
3294 |
|
3295 if (vlan_tx_tag_present(skb)) { |
|
3296 tx_flags |= E1000_TX_FLAGS_VLAN; |
|
3297 tx_flags |= (vlan_tx_tag_get(skb) << E1000_TX_FLAGS_VLAN_SHIFT); |
|
3298 } |
|
3299 |
|
3300 first = tx_ring->next_to_use; |
|
3301 |
|
3302 tso = e1000_tso(adapter, tx_ring, skb); |
|
3303 if (tso < 0) { |
|
3304 if (!adapter->ecdev) { |
|
3305 dev_kfree_skb_any(skb); |
|
3306 } |
|
3307 return NETDEV_TX_OK; |
|
3308 } |
|
3309 |
|
3310 if (likely(tso)) { |
|
3311 if (likely(hw->mac_type != e1000_82544)) |
|
3312 tx_ring->last_tx_tso = true; |
|
3313 tx_flags |= E1000_TX_FLAGS_TSO; |
|
3314 } else if (likely(e1000_tx_csum(adapter, tx_ring, skb))) |
|
3315 tx_flags |= E1000_TX_FLAGS_CSUM; |
|
3316 |
|
3317 if (likely(skb->protocol == htons(ETH_P_IP))) |
|
3318 tx_flags |= E1000_TX_FLAGS_IPV4; |
|
3319 |
|
3320 if (unlikely(skb->no_fcs)) |
|
3321 tx_flags |= E1000_TX_FLAGS_NO_FCS; |
|
3322 |
|
3323 count = e1000_tx_map(adapter, tx_ring, skb, first, max_per_txd, |
|
3324 nr_frags, mss); |
|
3325 |
|
3326 if (count) { |
|
3327 netdev_sent_queue(netdev, skb->len); |
|
3328 skb_tx_timestamp(skb); |
|
3329 |
|
3330 e1000_tx_queue(adapter, tx_ring, tx_flags, count); |
|
3331 if (!adapter->ecdev) { |
|
3332 /* Make sure there is space in the ring for the next send. */ |
|
3333 e1000_maybe_stop_tx(netdev, tx_ring, MAX_SKB_FRAGS + 2); |
|
3334 } |
|
3335 |
|
3336 } else { |
|
3337 if (!adapter->ecdev) { |
|
3338 dev_kfree_skb_any(skb); |
|
3339 } |
|
3340 tx_ring->buffer_info[first].time_stamp = 0; |
|
3341 tx_ring->next_to_use = first; |
|
3342 } |
|
3343 |
|
3344 return NETDEV_TX_OK; |
|
3345 } |
|
3346 |
|
3347 #define NUM_REGS 38 /* 1 based count */ |
|
3348 static void e1000_regdump(struct e1000_adapter *adapter) |
|
3349 { |
|
3350 struct e1000_hw *hw = &adapter->hw; |
|
3351 u32 regs[NUM_REGS]; |
|
3352 u32 *regs_buff = regs; |
|
3353 int i = 0; |
|
3354 |
|
3355 static const char * const reg_name[] = { |
|
3356 "CTRL", "STATUS", |
|
3357 "RCTL", "RDLEN", "RDH", "RDT", "RDTR", |
|
3358 "TCTL", "TDBAL", "TDBAH", "TDLEN", "TDH", "TDT", |
|
3359 "TIDV", "TXDCTL", "TADV", "TARC0", |
|
3360 "TDBAL1", "TDBAH1", "TDLEN1", "TDH1", "TDT1", |
|
3361 "TXDCTL1", "TARC1", |
|
3362 "CTRL_EXT", "ERT", "RDBAL", "RDBAH", |
|
3363 "TDFH", "TDFT", "TDFHS", "TDFTS", "TDFPC", |
|
3364 "RDFH", "RDFT", "RDFHS", "RDFTS", "RDFPC" |
|
3365 }; |
|
3366 |
|
3367 regs_buff[0] = er32(CTRL); |
|
3368 regs_buff[1] = er32(STATUS); |
|
3369 |
|
3370 regs_buff[2] = er32(RCTL); |
|
3371 regs_buff[3] = er32(RDLEN); |
|
3372 regs_buff[4] = er32(RDH); |
|
3373 regs_buff[5] = er32(RDT); |
|
3374 regs_buff[6] = er32(RDTR); |
|
3375 |
|
3376 regs_buff[7] = er32(TCTL); |
|
3377 regs_buff[8] = er32(TDBAL); |
|
3378 regs_buff[9] = er32(TDBAH); |
|
3379 regs_buff[10] = er32(TDLEN); |
|
3380 regs_buff[11] = er32(TDH); |
|
3381 regs_buff[12] = er32(TDT); |
|
3382 regs_buff[13] = er32(TIDV); |
|
3383 regs_buff[14] = er32(TXDCTL); |
|
3384 regs_buff[15] = er32(TADV); |
|
3385 regs_buff[16] = er32(TARC0); |
|
3386 |
|
3387 regs_buff[17] = er32(TDBAL1); |
|
3388 regs_buff[18] = er32(TDBAH1); |
|
3389 regs_buff[19] = er32(TDLEN1); |
|
3390 regs_buff[20] = er32(TDH1); |
|
3391 regs_buff[21] = er32(TDT1); |
|
3392 regs_buff[22] = er32(TXDCTL1); |
|
3393 regs_buff[23] = er32(TARC1); |
|
3394 regs_buff[24] = er32(CTRL_EXT); |
|
3395 regs_buff[25] = er32(ERT); |
|
3396 regs_buff[26] = er32(RDBAL0); |
|
3397 regs_buff[27] = er32(RDBAH0); |
|
3398 regs_buff[28] = er32(TDFH); |
|
3399 regs_buff[29] = er32(TDFT); |
|
3400 regs_buff[30] = er32(TDFHS); |
|
3401 regs_buff[31] = er32(TDFTS); |
|
3402 regs_buff[32] = er32(TDFPC); |
|
3403 regs_buff[33] = er32(RDFH); |
|
3404 regs_buff[34] = er32(RDFT); |
|
3405 regs_buff[35] = er32(RDFHS); |
|
3406 regs_buff[36] = er32(RDFTS); |
|
3407 regs_buff[37] = er32(RDFPC); |
|
3408 |
|
3409 pr_info("Register dump\n"); |
|
3410 for (i = 0; i < NUM_REGS; i++) |
|
3411 pr_info("%-15s %08x\n", reg_name[i], regs_buff[i]); |
|
3412 } |
|
3413 |
|
3414 /* |
|
3415 * e1000_dump: Print registers, tx ring and rx ring |
|
3416 */ |
|
3417 static void e1000_dump(struct e1000_adapter *adapter) |
|
3418 { |
|
3419 /* this code doesn't handle multiple rings */ |
|
3420 struct e1000_tx_ring *tx_ring = adapter->tx_ring; |
|
3421 struct e1000_rx_ring *rx_ring = adapter->rx_ring; |
|
3422 int i; |
|
3423 |
|
3424 if (!netif_msg_hw(adapter)) |
|
3425 return; |
|
3426 |
|
3427 /* Print Registers */ |
|
3428 e1000_regdump(adapter); |
|
3429 |
|
3430 /* transmit dump */ |
|
3431 pr_info("TX Desc ring0 dump\n"); |
|
3432 |
|
3433 /* Transmit Descriptor Formats - DEXT[29] is 0 (Legacy) or 1 (Extended) |
|
3434 * |
|
3435 * Legacy Transmit Descriptor |
|
3436 * +--------------------------------------------------------------+ |
|
3437 * 0 | Buffer Address [63:0] (Reserved on Write Back) | |
|
3438 * +--------------------------------------------------------------+ |
|
3439 * 8 | Special | CSS | Status | CMD | CSO | Length | |
|
3440 * +--------------------------------------------------------------+ |
|
3441 * 63 48 47 36 35 32 31 24 23 16 15 0 |
|
3442 * |
|
3443 * Extended Context Descriptor (DTYP=0x0) for TSO or checksum offload |
|
3444 * 63 48 47 40 39 32 31 16 15 8 7 0 |
|
3445 * +----------------------------------------------------------------+ |
|
3446 * 0 | TUCSE | TUCS0 | TUCSS | IPCSE | IPCS0 | IPCSS | |
|
3447 * +----------------------------------------------------------------+ |
|
3448 * 8 | MSS | HDRLEN | RSV | STA | TUCMD | DTYP | PAYLEN | |
|
3449 * +----------------------------------------------------------------+ |
|
3450 * 63 48 47 40 39 36 35 32 31 24 23 20 19 0 |
|
3451 * |
|
3452 * Extended Data Descriptor (DTYP=0x1) |
|
3453 * +----------------------------------------------------------------+ |
|
3454 * 0 | Buffer Address [63:0] | |
|
3455 * +----------------------------------------------------------------+ |
|
3456 * 8 | VLAN tag | POPTS | Rsvd | Status | Command | DTYP | DTALEN | |
|
3457 * +----------------------------------------------------------------+ |
|
3458 * 63 48 47 40 39 36 35 32 31 24 23 20 19 0 |
|
3459 */ |
|
3460 pr_info("Tc[desc] [Ce CoCsIpceCoS] [MssHlRSCm0Plen] [bi->dma ] leng ntw timestmp bi->skb\n"); |
|
3461 pr_info("Td[desc] [address 63:0 ] [VlaPoRSCm1Dlen] [bi->dma ] leng ntw timestmp bi->skb\n"); |
|
3462 |
|
3463 if (!netif_msg_tx_done(adapter)) |
|
3464 goto rx_ring_summary; |
|
3465 |
|
3466 for (i = 0; tx_ring->desc && (i < tx_ring->count); i++) { |
|
3467 struct e1000_tx_desc *tx_desc = E1000_TX_DESC(*tx_ring, i); |
|
3468 struct e1000_buffer *buffer_info = &tx_ring->buffer_info[i]; |
|
3469 struct my_u { __le64 a; __le64 b; }; |
|
3470 struct my_u *u = (struct my_u *)tx_desc; |
|
3471 const char *type; |
|
3472 |
|
3473 if (i == tx_ring->next_to_use && i == tx_ring->next_to_clean) |
|
3474 type = "NTC/U"; |
|
3475 else if (i == tx_ring->next_to_use) |
|
3476 type = "NTU"; |
|
3477 else if (i == tx_ring->next_to_clean) |
|
3478 type = "NTC"; |
|
3479 else |
|
3480 type = ""; |
|
3481 |
|
3482 pr_info("T%c[0x%03X] %016llX %016llX %016llX %04X %3X %016llX %p %s\n", |
|
3483 ((le64_to_cpu(u->b) & (1<<20)) ? 'd' : 'c'), i, |
|
3484 le64_to_cpu(u->a), le64_to_cpu(u->b), |
|
3485 (u64)buffer_info->dma, buffer_info->length, |
|
3486 buffer_info->next_to_watch, |
|
3487 (u64)buffer_info->time_stamp, buffer_info->skb, type); |
|
3488 } |
|
3489 |
|
3490 rx_ring_summary: |
|
3491 /* receive dump */ |
|
3492 pr_info("\nRX Desc ring dump\n"); |
|
3493 |
|
3494 /* Legacy Receive Descriptor Format |
|
3495 * |
|
3496 * +-----------------------------------------------------+ |
|
3497 * | Buffer Address [63:0] | |
|
3498 * +-----------------------------------------------------+ |
|
3499 * | VLAN Tag | Errors | Status 0 | Packet csum | Length | |
|
3500 * +-----------------------------------------------------+ |
|
3501 * 63 48 47 40 39 32 31 16 15 0 |
|
3502 */ |
|
3503 pr_info("R[desc] [address 63:0 ] [vl er S cks ln] [bi->dma ] [bi->skb]\n"); |
|
3504 |
|
3505 if (!netif_msg_rx_status(adapter)) |
|
3506 goto exit; |
|
3507 |
|
3508 for (i = 0; rx_ring->desc && (i < rx_ring->count); i++) { |
|
3509 struct e1000_rx_desc *rx_desc = E1000_RX_DESC(*rx_ring, i); |
|
3510 struct e1000_buffer *buffer_info = &rx_ring->buffer_info[i]; |
|
3511 struct my_u { __le64 a; __le64 b; }; |
|
3512 struct my_u *u = (struct my_u *)rx_desc; |
|
3513 const char *type; |
|
3514 |
|
3515 if (i == rx_ring->next_to_use) |
|
3516 type = "NTU"; |
|
3517 else if (i == rx_ring->next_to_clean) |
|
3518 type = "NTC"; |
|
3519 else |
|
3520 type = ""; |
|
3521 |
|
3522 pr_info("R[0x%03X] %016llX %016llX %016llX %p %s\n", |
|
3523 i, le64_to_cpu(u->a), le64_to_cpu(u->b), |
|
3524 (u64)buffer_info->dma, buffer_info->skb, type); |
|
3525 } /* for */ |
|
3526 |
|
3527 /* dump the descriptor caches */ |
|
3528 /* rx */ |
|
3529 pr_info("Rx descriptor cache in 64bit format\n"); |
|
3530 for (i = 0x6000; i <= 0x63FF ; i += 0x10) { |
|
3531 pr_info("R%04X: %08X|%08X %08X|%08X\n", |
|
3532 i, |
|
3533 readl(adapter->hw.hw_addr + i+4), |
|
3534 readl(adapter->hw.hw_addr + i), |
|
3535 readl(adapter->hw.hw_addr + i+12), |
|
3536 readl(adapter->hw.hw_addr + i+8)); |
|
3537 } |
|
3538 /* tx */ |
|
3539 pr_info("Tx descriptor cache in 64bit format\n"); |
|
3540 for (i = 0x7000; i <= 0x73FF ; i += 0x10) { |
|
3541 pr_info("T%04X: %08X|%08X %08X|%08X\n", |
|
3542 i, |
|
3543 readl(adapter->hw.hw_addr + i+4), |
|
3544 readl(adapter->hw.hw_addr + i), |
|
3545 readl(adapter->hw.hw_addr + i+12), |
|
3546 readl(adapter->hw.hw_addr + i+8)); |
|
3547 } |
|
3548 exit: |
|
3549 return; |
|
3550 } |
|
3551 |
|
3552 /** |
|
3553 * e1000_tx_timeout - Respond to a Tx Hang |
|
3554 * @netdev: network interface device structure |
|
3555 **/ |
|
3556 static void e1000_tx_timeout(struct net_device *netdev) |
|
3557 { |
|
3558 struct e1000_adapter *adapter = netdev_priv(netdev); |
|
3559 |
|
3560 /* Do the reset outside of interrupt context */ |
|
3561 adapter->tx_timeout_count++; |
|
3562 schedule_work(&adapter->reset_task); |
|
3563 } |
|
3564 |
|
3565 static void e1000_reset_task(struct work_struct *work) |
|
3566 { |
|
3567 struct e1000_adapter *adapter = |
|
3568 container_of(work, struct e1000_adapter, reset_task); |
|
3569 |
|
3570 e_err(drv, "Reset adapter\n"); |
|
3571 e1000_reinit_locked(adapter); |
|
3572 } |
|
3573 |
|
3574 /** |
|
3575 * e1000_get_stats - Get System Network Statistics |
|
3576 * @netdev: network interface device structure |
|
3577 * |
|
3578 * Returns the address of the device statistics structure. |
|
3579 * The statistics are actually updated from the watchdog. |
|
3580 **/ |
|
3581 static struct net_device_stats *e1000_get_stats(struct net_device *netdev) |
|
3582 { |
|
3583 /* only return the current stats */ |
|
3584 return &netdev->stats; |
|
3585 } |
|
3586 |
|
3587 /** |
|
3588 * e1000_change_mtu - Change the Maximum Transfer Unit |
|
3589 * @netdev: network interface device structure |
|
3590 * @new_mtu: new value for maximum frame size |
|
3591 * |
|
3592 * Returns 0 on success, negative on failure |
|
3593 **/ |
|
3594 static int e1000_change_mtu(struct net_device *netdev, int new_mtu) |
|
3595 { |
|
3596 struct e1000_adapter *adapter = netdev_priv(netdev); |
|
3597 struct e1000_hw *hw = &adapter->hw; |
|
3598 int max_frame = new_mtu + ENET_HEADER_SIZE + ETHERNET_FCS_SIZE; |
|
3599 |
|
3600 if (adapter->ecdev) { |
|
3601 return -EBUSY; |
|
3602 } |
|
3603 |
|
3604 if ((max_frame < MINIMUM_ETHERNET_FRAME_SIZE) || |
|
3605 (max_frame > MAX_JUMBO_FRAME_SIZE)) { |
|
3606 e_err(probe, "Invalid MTU setting\n"); |
|
3607 return -EINVAL; |
|
3608 } |
|
3609 |
|
3610 /* Adapter-specific max frame size limits. */ |
|
3611 switch (hw->mac_type) { |
|
3612 case e1000_undefined ... e1000_82542_rev2_1: |
|
3613 if (max_frame > (ETH_FRAME_LEN + ETH_FCS_LEN)) { |
|
3614 e_err(probe, "Jumbo Frames not supported.\n"); |
|
3615 return -EINVAL; |
|
3616 } |
|
3617 break; |
|
3618 default: |
|
3619 /* Capable of supporting up to MAX_JUMBO_FRAME_SIZE limit. */ |
|
3620 break; |
|
3621 } |
|
3622 |
|
3623 while (test_and_set_bit(__E1000_RESETTING, &adapter->flags)) |
|
3624 msleep(1); |
|
3625 /* e1000_down has a dependency on max_frame_size */ |
|
3626 hw->max_frame_size = max_frame; |
|
3627 if (netif_running(netdev)) |
|
3628 e1000_down(adapter); |
|
3629 |
|
3630 /* NOTE: netdev_alloc_skb reserves 16 bytes, and typically NET_IP_ALIGN |
|
3631 * means we reserve 2 more, this pushes us to allocate from the next |
|
3632 * larger slab size. |
|
3633 * i.e. RXBUFFER_2048 --> size-4096 slab |
|
3634 * however with the new *_jumbo_rx* routines, jumbo receives will use |
|
3635 * fragmented skbs |
|
3636 */ |
|
3637 |
|
3638 if (max_frame <= E1000_RXBUFFER_2048) |
|
3639 adapter->rx_buffer_len = E1000_RXBUFFER_2048; |
|
3640 else |
|
3641 #if (PAGE_SIZE >= E1000_RXBUFFER_16384) |
|
3642 adapter->rx_buffer_len = E1000_RXBUFFER_16384; |
|
3643 #elif (PAGE_SIZE >= E1000_RXBUFFER_4096) |
|
3644 adapter->rx_buffer_len = PAGE_SIZE; |
|
3645 #endif |
|
3646 |
|
3647 /* adjust allocation if LPE protects us, and we aren't using SBP */ |
|
3648 if (!hw->tbi_compatibility_on && |
|
3649 ((max_frame == (ETH_FRAME_LEN + ETH_FCS_LEN)) || |
|
3650 (max_frame == MAXIMUM_ETHERNET_VLAN_SIZE))) |
|
3651 adapter->rx_buffer_len = MAXIMUM_ETHERNET_VLAN_SIZE; |
|
3652 |
|
3653 pr_info("%s changing MTU from %d to %d\n", |
|
3654 netdev->name, netdev->mtu, new_mtu); |
|
3655 netdev->mtu = new_mtu; |
|
3656 |
|
3657 if (netif_running(netdev)) |
|
3658 e1000_up(adapter); |
|
3659 else |
|
3660 e1000_reset(adapter); |
|
3661 |
|
3662 clear_bit(__E1000_RESETTING, &adapter->flags); |
|
3663 |
|
3664 return 0; |
|
3665 } |
|
3666 |
|
3667 /** |
|
3668 * e1000_update_stats - Update the board statistics counters |
|
3669 * @adapter: board private structure |
|
3670 **/ |
|
3671 void e1000_update_stats(struct e1000_adapter *adapter) |
|
3672 { |
|
3673 struct net_device *netdev = adapter->netdev; |
|
3674 struct e1000_hw *hw = &adapter->hw; |
|
3675 struct pci_dev *pdev = adapter->pdev; |
|
3676 unsigned long flags = 0; |
|
3677 u16 phy_tmp; |
|
3678 |
|
3679 #define PHY_IDLE_ERROR_COUNT_MASK 0x00FF |
|
3680 |
|
3681 /* Prevent stats update while adapter is being reset, or if the pci |
|
3682 * connection is down. |
|
3683 */ |
|
3684 if (adapter->link_speed == 0) |
|
3685 return; |
|
3686 if (pci_channel_offline(pdev)) |
|
3687 return; |
|
3688 |
|
3689 if (!adapter->ecdev) { |
|
3690 spin_lock_irqsave(&adapter->stats_lock, flags); |
|
3691 } |
|
3692 |
|
3693 /* these counters are modified from e1000_tbi_adjust_stats, |
|
3694 * called from the interrupt context, so they must only |
|
3695 * be written while holding adapter->stats_lock |
|
3696 */ |
|
3697 |
|
3698 adapter->stats.crcerrs += er32(CRCERRS); |
|
3699 adapter->stats.gprc += er32(GPRC); |
|
3700 adapter->stats.gorcl += er32(GORCL); |
|
3701 adapter->stats.gorch += er32(GORCH); |
|
3702 adapter->stats.bprc += er32(BPRC); |
|
3703 adapter->stats.mprc += er32(MPRC); |
|
3704 adapter->stats.roc += er32(ROC); |
|
3705 |
|
3706 adapter->stats.prc64 += er32(PRC64); |
|
3707 adapter->stats.prc127 += er32(PRC127); |
|
3708 adapter->stats.prc255 += er32(PRC255); |
|
3709 adapter->stats.prc511 += er32(PRC511); |
|
3710 adapter->stats.prc1023 += er32(PRC1023); |
|
3711 adapter->stats.prc1522 += er32(PRC1522); |
|
3712 |
|
3713 adapter->stats.symerrs += er32(SYMERRS); |
|
3714 adapter->stats.mpc += er32(MPC); |
|
3715 adapter->stats.scc += er32(SCC); |
|
3716 adapter->stats.ecol += er32(ECOL); |
|
3717 adapter->stats.mcc += er32(MCC); |
|
3718 adapter->stats.latecol += er32(LATECOL); |
|
3719 adapter->stats.dc += er32(DC); |
|
3720 adapter->stats.sec += er32(SEC); |
|
3721 adapter->stats.rlec += er32(RLEC); |
|
3722 adapter->stats.xonrxc += er32(XONRXC); |
|
3723 adapter->stats.xontxc += er32(XONTXC); |
|
3724 adapter->stats.xoffrxc += er32(XOFFRXC); |
|
3725 adapter->stats.xofftxc += er32(XOFFTXC); |
|
3726 adapter->stats.fcruc += er32(FCRUC); |
|
3727 adapter->stats.gptc += er32(GPTC); |
|
3728 adapter->stats.gotcl += er32(GOTCL); |
|
3729 adapter->stats.gotch += er32(GOTCH); |
|
3730 adapter->stats.rnbc += er32(RNBC); |
|
3731 adapter->stats.ruc += er32(RUC); |
|
3732 adapter->stats.rfc += er32(RFC); |
|
3733 adapter->stats.rjc += er32(RJC); |
|
3734 adapter->stats.torl += er32(TORL); |
|
3735 adapter->stats.torh += er32(TORH); |
|
3736 adapter->stats.totl += er32(TOTL); |
|
3737 adapter->stats.toth += er32(TOTH); |
|
3738 adapter->stats.tpr += er32(TPR); |
|
3739 |
|
3740 adapter->stats.ptc64 += er32(PTC64); |
|
3741 adapter->stats.ptc127 += er32(PTC127); |
|
3742 adapter->stats.ptc255 += er32(PTC255); |
|
3743 adapter->stats.ptc511 += er32(PTC511); |
|
3744 adapter->stats.ptc1023 += er32(PTC1023); |
|
3745 adapter->stats.ptc1522 += er32(PTC1522); |
|
3746 |
|
3747 adapter->stats.mptc += er32(MPTC); |
|
3748 adapter->stats.bptc += er32(BPTC); |
|
3749 |
|
3750 /* used for adaptive IFS */ |
|
3751 |
|
3752 hw->tx_packet_delta = er32(TPT); |
|
3753 adapter->stats.tpt += hw->tx_packet_delta; |
|
3754 hw->collision_delta = er32(COLC); |
|
3755 adapter->stats.colc += hw->collision_delta; |
|
3756 |
|
3757 if (hw->mac_type >= e1000_82543) { |
|
3758 adapter->stats.algnerrc += er32(ALGNERRC); |
|
3759 adapter->stats.rxerrc += er32(RXERRC); |
|
3760 adapter->stats.tncrs += er32(TNCRS); |
|
3761 adapter->stats.cexterr += er32(CEXTERR); |
|
3762 adapter->stats.tsctc += er32(TSCTC); |
|
3763 adapter->stats.tsctfc += er32(TSCTFC); |
|
3764 } |
|
3765 |
|
3766 /* Fill out the OS statistics structure */ |
|
3767 netdev->stats.multicast = adapter->stats.mprc; |
|
3768 netdev->stats.collisions = adapter->stats.colc; |
|
3769 |
|
3770 /* Rx Errors */ |
|
3771 |
|
3772 /* RLEC on some newer hardware can be incorrect so build |
|
3773 * our own version based on RUC and ROC |
|
3774 */ |
|
3775 netdev->stats.rx_errors = adapter->stats.rxerrc + |
|
3776 adapter->stats.crcerrs + adapter->stats.algnerrc + |
|
3777 adapter->stats.ruc + adapter->stats.roc + |
|
3778 adapter->stats.cexterr; |
|
3779 adapter->stats.rlerrc = adapter->stats.ruc + adapter->stats.roc; |
|
3780 netdev->stats.rx_length_errors = adapter->stats.rlerrc; |
|
3781 netdev->stats.rx_crc_errors = adapter->stats.crcerrs; |
|
3782 netdev->stats.rx_frame_errors = adapter->stats.algnerrc; |
|
3783 netdev->stats.rx_missed_errors = adapter->stats.mpc; |
|
3784 |
|
3785 /* Tx Errors */ |
|
3786 adapter->stats.txerrc = adapter->stats.ecol + adapter->stats.latecol; |
|
3787 netdev->stats.tx_errors = adapter->stats.txerrc; |
|
3788 netdev->stats.tx_aborted_errors = adapter->stats.ecol; |
|
3789 netdev->stats.tx_window_errors = adapter->stats.latecol; |
|
3790 netdev->stats.tx_carrier_errors = adapter->stats.tncrs; |
|
3791 if (hw->bad_tx_carr_stats_fd && |
|
3792 adapter->link_duplex == FULL_DUPLEX) { |
|
3793 netdev->stats.tx_carrier_errors = 0; |
|
3794 adapter->stats.tncrs = 0; |
|
3795 } |
|
3796 |
|
3797 /* Tx Dropped needs to be maintained elsewhere */ |
|
3798 |
|
3799 /* Phy Stats */ |
|
3800 if (hw->media_type == e1000_media_type_copper) { |
|
3801 if ((adapter->link_speed == SPEED_1000) && |
|
3802 (!e1000_read_phy_reg(hw, PHY_1000T_STATUS, &phy_tmp))) { |
|
3803 phy_tmp &= PHY_IDLE_ERROR_COUNT_MASK; |
|
3804 adapter->phy_stats.idle_errors += phy_tmp; |
|
3805 } |
|
3806 |
|
3807 if ((hw->mac_type <= e1000_82546) && |
|
3808 (hw->phy_type == e1000_phy_m88) && |
|
3809 !e1000_read_phy_reg(hw, M88E1000_RX_ERR_CNTR, &phy_tmp)) |
|
3810 adapter->phy_stats.receive_errors += phy_tmp; |
|
3811 } |
|
3812 |
|
3813 /* Management Stats */ |
|
3814 if (hw->has_smbus) { |
|
3815 adapter->stats.mgptc += er32(MGTPTC); |
|
3816 adapter->stats.mgprc += er32(MGTPRC); |
|
3817 adapter->stats.mgpdc += er32(MGTPDC); |
|
3818 } |
|
3819 |
|
3820 if (!adapter->ecdev) { |
|
3821 spin_unlock_irqrestore(&adapter->stats_lock, flags); |
|
3822 } |
|
3823 } |
|
3824 |
|
3825 void ec_poll(struct net_device *netdev) |
|
3826 { |
|
3827 struct e1000_adapter *adapter = netdev_priv(netdev); |
|
3828 if (jiffies - adapter->ec_watchdog_jiffies >= 2 * HZ) { |
|
3829 e1000_watchdog(&adapter->watchdog_task.work); |
|
3830 adapter->ec_watchdog_jiffies = jiffies; |
|
3831 } |
|
3832 |
|
3833 e1000_intr(0, netdev); |
|
3834 } |
|
3835 |
|
3836 /** |
|
3837 * e1000_intr - Interrupt Handler |
|
3838 * @irq: interrupt number |
|
3839 * @data: pointer to a network interface device structure |
|
3840 **/ |
|
3841 static irqreturn_t e1000_intr(int irq, void *data) |
|
3842 { |
|
3843 struct net_device *netdev = data; |
|
3844 struct e1000_adapter *adapter = netdev_priv(netdev); |
|
3845 struct e1000_hw *hw = &adapter->hw; |
|
3846 u32 icr = er32(ICR); |
|
3847 |
|
3848 if (unlikely((!icr))) |
|
3849 return IRQ_NONE; /* Not our interrupt */ |
|
3850 |
|
3851 /* we might have caused the interrupt, but the above |
|
3852 * read cleared it, and just in case the driver is |
|
3853 * down there is nothing to do so return handled |
|
3854 */ |
|
3855 if (unlikely(test_bit(__E1000_DOWN, &adapter->flags))) |
|
3856 return IRQ_HANDLED; |
|
3857 |
|
3858 if (unlikely(icr & (E1000_ICR_RXSEQ | E1000_ICR_LSC))) { |
|
3859 hw->get_link_status = 1; |
|
3860 /* guard against interrupt when we're going down */ |
|
3861 if (!adapter->ecdev && !test_bit(__E1000_DOWN, &adapter->flags)) |
|
3862 schedule_delayed_work(&adapter->watchdog_task, 1); |
|
3863 } |
|
3864 |
|
3865 if (adapter->ecdev) { |
|
3866 int i, ec_work_done = 0; |
|
3867 for (i = 0; i < E1000_MAX_INTR; i++) { |
|
3868 if (unlikely(!adapter->clean_rx(adapter, adapter->rx_ring, |
|
3869 &ec_work_done, 100) && |
|
3870 !e1000_clean_tx_irq(adapter, adapter->tx_ring))) { |
|
3871 break; |
|
3872 } |
|
3873 } |
|
3874 } else { |
|
3875 /* disable interrupts, without the synchronize_irq bit */ |
|
3876 ew32(IMC, ~0); |
|
3877 E1000_WRITE_FLUSH(); |
|
3878 |
|
3879 if (likely(napi_schedule_prep(&adapter->napi))) { |
|
3880 adapter->total_tx_bytes = 0; |
|
3881 adapter->total_tx_packets = 0; |
|
3882 adapter->total_rx_bytes = 0; |
|
3883 adapter->total_rx_packets = 0; |
|
3884 __napi_schedule(&adapter->napi); |
|
3885 } else { |
|
3886 /* this really should not happen! if it does it is basically a |
|
3887 * bug, but not a hard error, so enable ints and continue |
|
3888 */ |
|
3889 if (!test_bit(__E1000_DOWN, &adapter->flags)) |
|
3890 e1000_irq_enable(adapter); |
|
3891 } |
|
3892 } |
|
3893 |
|
3894 return IRQ_HANDLED; |
|
3895 } |
|
3896 |
|
3897 /** |
|
3898 * e1000_clean - NAPI Rx polling callback |
|
3899 * @adapter: board private structure |
|
3900 * EtherCAT: never called |
|
3901 **/ |
|
3902 static int e1000_clean(struct napi_struct *napi, int budget) |
|
3903 { |
|
3904 struct e1000_adapter *adapter = container_of(napi, struct e1000_adapter, |
|
3905 napi); |
|
3906 int tx_clean_complete = 0, work_done = 0; |
|
3907 |
|
3908 tx_clean_complete = e1000_clean_tx_irq(adapter, &adapter->tx_ring[0]); |
|
3909 |
|
3910 adapter->clean_rx(adapter, &adapter->rx_ring[0], &work_done, budget); |
|
3911 |
|
3912 if (!tx_clean_complete) |
|
3913 work_done = budget; |
|
3914 |
|
3915 /* If budget not fully consumed, exit the polling mode */ |
|
3916 if (work_done < budget) { |
|
3917 if (likely(adapter->itr_setting & 3)) |
|
3918 e1000_set_itr(adapter); |
|
3919 napi_complete(napi); |
|
3920 if (!test_bit(__E1000_DOWN, &adapter->flags)) |
|
3921 e1000_irq_enable(adapter); |
|
3922 } |
|
3923 |
|
3924 return work_done; |
|
3925 } |
|
3926 |
|
3927 /** |
|
3928 * e1000_clean_tx_irq - Reclaim resources after transmit completes |
|
3929 * @adapter: board private structure |
|
3930 **/ |
|
3931 static bool e1000_clean_tx_irq(struct e1000_adapter *adapter, |
|
3932 struct e1000_tx_ring *tx_ring) |
|
3933 { |
|
3934 struct e1000_hw *hw = &adapter->hw; |
|
3935 struct net_device *netdev = adapter->netdev; |
|
3936 struct e1000_tx_desc *tx_desc, *eop_desc; |
|
3937 struct e1000_buffer *buffer_info; |
|
3938 unsigned int i, eop; |
|
3939 unsigned int count = 0; |
|
3940 unsigned int total_tx_bytes=0, total_tx_packets=0; |
|
3941 unsigned int bytes_compl = 0, pkts_compl = 0; |
|
3942 |
|
3943 i = tx_ring->next_to_clean; |
|
3944 eop = tx_ring->buffer_info[i].next_to_watch; |
|
3945 eop_desc = E1000_TX_DESC(*tx_ring, eop); |
|
3946 |
|
3947 while ((eop_desc->upper.data & cpu_to_le32(E1000_TXD_STAT_DD)) && |
|
3948 (count < tx_ring->count)) { |
|
3949 bool cleaned = false; |
|
3950 rmb(); /* read buffer_info after eop_desc */ |
|
3951 for ( ; !cleaned; count++) { |
|
3952 tx_desc = E1000_TX_DESC(*tx_ring, i); |
|
3953 buffer_info = &tx_ring->buffer_info[i]; |
|
3954 cleaned = (i == eop); |
|
3955 |
|
3956 if (cleaned) { |
|
3957 total_tx_packets += buffer_info->segs; |
|
3958 total_tx_bytes += buffer_info->bytecount; |
|
3959 if (buffer_info->skb) { |
|
3960 bytes_compl += buffer_info->skb->len; |
|
3961 pkts_compl++; |
|
3962 } |
|
3963 |
|
3964 } |
|
3965 e1000_unmap_and_free_tx_resource(adapter, buffer_info); |
|
3966 tx_desc->upper.data = 0; |
|
3967 |
|
3968 if (unlikely(++i == tx_ring->count)) i = 0; |
|
3969 } |
|
3970 |
|
3971 eop = tx_ring->buffer_info[i].next_to_watch; |
|
3972 eop_desc = E1000_TX_DESC(*tx_ring, eop); |
|
3973 } |
|
3974 |
|
3975 tx_ring->next_to_clean = i; |
|
3976 |
|
3977 netdev_completed_queue(netdev, pkts_compl, bytes_compl); |
|
3978 |
|
3979 #define TX_WAKE_THRESHOLD 32 |
|
3980 if (!adapter->ecdev && unlikely(count && netif_carrier_ok(netdev) && |
|
3981 E1000_DESC_UNUSED(tx_ring) >= TX_WAKE_THRESHOLD)) { |
|
3982 /* Make sure that anybody stopping the queue after this |
|
3983 * sees the new next_to_clean. |
|
3984 */ |
|
3985 smp_mb(); |
|
3986 |
|
3987 if (netif_queue_stopped(netdev) && |
|
3988 !(test_bit(__E1000_DOWN, &adapter->flags))) { |
|
3989 netif_wake_queue(netdev); |
|
3990 ++adapter->restart_queue; |
|
3991 } |
|
3992 } |
|
3993 |
|
3994 if (!adapter->ecdev && adapter->detect_tx_hung) { |
|
3995 /* Detect a transmit hang in hardware, this serializes the |
|
3996 * check with the clearing of time_stamp and movement of i |
|
3997 */ |
|
3998 adapter->detect_tx_hung = false; |
|
3999 if (tx_ring->buffer_info[eop].time_stamp && |
|
4000 time_after(jiffies, tx_ring->buffer_info[eop].time_stamp + |
|
4001 (adapter->tx_timeout_factor * HZ)) && |
|
4002 !(er32(STATUS) & E1000_STATUS_TXOFF)) { |
|
4003 |
|
4004 /* detected Tx unit hang */ |
|
4005 e_err(drv, "Detected Tx Unit Hang\n" |
|
4006 " Tx Queue <%lu>\n" |
|
4007 " TDH <%x>\n" |
|
4008 " TDT <%x>\n" |
|
4009 " next_to_use <%x>\n" |
|
4010 " next_to_clean <%x>\n" |
|
4011 "buffer_info[next_to_clean]\n" |
|
4012 " time_stamp <%lx>\n" |
|
4013 " next_to_watch <%x>\n" |
|
4014 " jiffies <%lx>\n" |
|
4015 " next_to_watch.status <%x>\n", |
|
4016 (unsigned long)(tx_ring - adapter->tx_ring), |
|
4017 readl(hw->hw_addr + tx_ring->tdh), |
|
4018 readl(hw->hw_addr + tx_ring->tdt), |
|
4019 tx_ring->next_to_use, |
|
4020 tx_ring->next_to_clean, |
|
4021 tx_ring->buffer_info[eop].time_stamp, |
|
4022 eop, |
|
4023 jiffies, |
|
4024 eop_desc->upper.fields.status); |
|
4025 e1000_dump(adapter); |
|
4026 netif_stop_queue(netdev); |
|
4027 } |
|
4028 } |
|
4029 adapter->total_tx_bytes += total_tx_bytes; |
|
4030 adapter->total_tx_packets += total_tx_packets; |
|
4031 netdev->stats.tx_bytes += total_tx_bytes; |
|
4032 netdev->stats.tx_packets += total_tx_packets; |
|
4033 return count < tx_ring->count; |
|
4034 } |
|
4035 |
|
4036 /** |
|
4037 * e1000_rx_checksum - Receive Checksum Offload for 82543 |
|
4038 * @adapter: board private structure |
|
4039 * @status_err: receive descriptor status and error fields |
|
4040 * @csum: receive descriptor csum field |
|
4041 * @sk_buff: socket buffer with received data |
|
4042 **/ |
|
4043 static void e1000_rx_checksum(struct e1000_adapter *adapter, u32 status_err, |
|
4044 u32 csum, struct sk_buff *skb) |
|
4045 { |
|
4046 struct e1000_hw *hw = &adapter->hw; |
|
4047 u16 status = (u16)status_err; |
|
4048 u8 errors = (u8)(status_err >> 24); |
|
4049 |
|
4050 skb_checksum_none_assert(skb); |
|
4051 |
|
4052 /* 82543 or newer only */ |
|
4053 if (unlikely(hw->mac_type < e1000_82543)) return; |
|
4054 /* Ignore Checksum bit is set */ |
|
4055 if (unlikely(status & E1000_RXD_STAT_IXSM)) return; |
|
4056 /* TCP/UDP checksum error bit is set */ |
|
4057 if (unlikely(errors & E1000_RXD_ERR_TCPE)) { |
|
4058 /* let the stack verify checksum errors */ |
|
4059 adapter->hw_csum_err++; |
|
4060 return; |
|
4061 } |
|
4062 /* TCP/UDP Checksum has not been calculated */ |
|
4063 if (!(status & E1000_RXD_STAT_TCPCS)) |
|
4064 return; |
|
4065 |
|
4066 /* It must be a TCP or UDP packet with a valid checksum */ |
|
4067 if (likely(status & E1000_RXD_STAT_TCPCS)) { |
|
4068 /* TCP checksum is good */ |
|
4069 skb->ip_summed = CHECKSUM_UNNECESSARY; |
|
4070 } |
|
4071 adapter->hw_csum_good++; |
|
4072 } |
|
4073 |
|
4074 /** |
|
4075 * e1000_consume_page - helper function |
|
4076 **/ |
|
4077 static void e1000_consume_page(struct e1000_buffer *bi, struct sk_buff *skb, |
|
4078 u16 length) |
|
4079 { |
|
4080 bi->page = NULL; |
|
4081 skb->len += length; |
|
4082 skb->data_len += length; |
|
4083 skb->truesize += PAGE_SIZE; |
|
4084 } |
|
4085 |
|
4086 /** |
|
4087 * e1000_receive_skb - helper function to handle rx indications |
|
4088 * @adapter: board private structure |
|
4089 * @status: descriptor status field as written by hardware |
|
4090 * @vlan: descriptor vlan field as written by hardware (no le/be conversion) |
|
4091 * @skb: pointer to sk_buff to be indicated to stack |
|
4092 */ |
|
4093 static void e1000_receive_skb(struct e1000_adapter *adapter, u8 status, |
|
4094 __le16 vlan, struct sk_buff *skb) |
|
4095 { |
|
4096 skb->protocol = eth_type_trans(skb, adapter->netdev); |
|
4097 |
|
4098 if (status & E1000_RXD_STAT_VP) { |
|
4099 u16 vid = le16_to_cpu(vlan) & E1000_RXD_SPC_VLAN_MASK; |
|
4100 |
|
4101 __vlan_hwaccel_put_tag(skb, htons(ETH_P_8021Q), vid); |
|
4102 } |
|
4103 napi_gro_receive(&adapter->napi, skb); |
|
4104 } |
|
4105 |
|
4106 /** |
|
4107 * e1000_clean_jumbo_rx_irq - Send received data up the network stack; legacy |
|
4108 * @adapter: board private structure |
|
4109 * @rx_ring: ring to clean |
|
4110 * @work_done: amount of napi work completed this call |
|
4111 * @work_to_do: max amount of work allowed for this call to do |
|
4112 * |
|
4113 * the return value indicates whether actual cleaning was done, there |
|
4114 * is no guarantee that everything was cleaned |
|
4115 */ |
|
4116 static bool e1000_clean_jumbo_rx_irq(struct e1000_adapter *adapter, |
|
4117 struct e1000_rx_ring *rx_ring, |
|
4118 int *work_done, int work_to_do) |
|
4119 { |
|
4120 struct e1000_hw *hw = &adapter->hw; |
|
4121 struct net_device *netdev = adapter->netdev; |
|
4122 struct pci_dev *pdev = adapter->pdev; |
|
4123 struct e1000_rx_desc *rx_desc, *next_rxd; |
|
4124 struct e1000_buffer *buffer_info, *next_buffer; |
|
4125 unsigned long irq_flags; |
|
4126 u32 length; |
|
4127 unsigned int i; |
|
4128 int cleaned_count = 0; |
|
4129 bool cleaned = false; |
|
4130 unsigned int total_rx_bytes=0, total_rx_packets=0; |
|
4131 |
|
4132 i = rx_ring->next_to_clean; |
|
4133 rx_desc = E1000_RX_DESC(*rx_ring, i); |
|
4134 buffer_info = &rx_ring->buffer_info[i]; |
|
4135 |
|
4136 while (rx_desc->status & E1000_RXD_STAT_DD) { |
|
4137 struct sk_buff *skb; |
|
4138 u8 status; |
|
4139 |
|
4140 if (*work_done >= work_to_do) |
|
4141 break; |
|
4142 (*work_done)++; |
|
4143 rmb(); /* read descriptor and rx_buffer_info after status DD */ |
|
4144 |
|
4145 status = rx_desc->status; |
|
4146 skb = buffer_info->skb; |
|
4147 if (!adapter->ecdev) { |
|
4148 buffer_info->skb = NULL; |
|
4149 } |
|
4150 |
|
4151 if (++i == rx_ring->count) i = 0; |
|
4152 next_rxd = E1000_RX_DESC(*rx_ring, i); |
|
4153 prefetch(next_rxd); |
|
4154 |
|
4155 next_buffer = &rx_ring->buffer_info[i]; |
|
4156 |
|
4157 cleaned = true; |
|
4158 cleaned_count++; |
|
4159 dma_unmap_page(&pdev->dev, buffer_info->dma, |
|
4160 buffer_info->length, DMA_FROM_DEVICE); |
|
4161 buffer_info->dma = 0; |
|
4162 |
|
4163 length = le16_to_cpu(rx_desc->length); |
|
4164 |
|
4165 /* errors is only valid for DD + EOP descriptors */ |
|
4166 if (!adapter->ecdev && |
|
4167 unlikely((status & E1000_RXD_STAT_EOP) && |
|
4168 (rx_desc->errors & E1000_RXD_ERR_FRAME_ERR_MASK))) { |
|
4169 u8 *mapped; |
|
4170 u8 last_byte; |
|
4171 |
|
4172 mapped = page_address(buffer_info->page); |
|
4173 last_byte = *(mapped + length - 1); |
|
4174 if (TBI_ACCEPT(hw, status, rx_desc->errors, length, |
|
4175 last_byte)) { |
|
4176 spin_lock_irqsave(&adapter->stats_lock, |
|
4177 irq_flags); |
|
4178 e1000_tbi_adjust_stats(hw, &adapter->stats, |
|
4179 length, mapped); |
|
4180 spin_unlock_irqrestore(&adapter->stats_lock, |
|
4181 irq_flags); |
|
4182 length--; |
|
4183 } else { |
|
4184 if (netdev->features & NETIF_F_RXALL) |
|
4185 goto process_skb; |
|
4186 /* recycle both page and skb */ |
|
4187 buffer_info->skb = skb; |
|
4188 /* an error means any chain goes out the window |
|
4189 * too |
|
4190 */ |
|
4191 if (!adapter->ecdev && rx_ring->rx_skb_top) |
|
4192 dev_kfree_skb(rx_ring->rx_skb_top); |
|
4193 rx_ring->rx_skb_top = NULL; |
|
4194 goto next_desc; |
|
4195 } |
|
4196 } |
|
4197 |
|
4198 #define rxtop rx_ring->rx_skb_top |
|
4199 process_skb: |
|
4200 if (!(status & E1000_RXD_STAT_EOP)) { |
|
4201 /* this descriptor is only the beginning (or middle) */ |
|
4202 if (!rxtop) { |
|
4203 /* this is the beginning of a chain */ |
|
4204 rxtop = skb; |
|
4205 skb_fill_page_desc(rxtop, 0, buffer_info->page, |
|
4206 0, length); |
|
4207 } else { |
|
4208 /* this is the middle of a chain */ |
|
4209 skb_fill_page_desc(rxtop, |
|
4210 skb_shinfo(rxtop)->nr_frags, |
|
4211 buffer_info->page, 0, length); |
|
4212 /* re-use the skb, only consumed the page */ |
|
4213 buffer_info->skb = skb; |
|
4214 } |
|
4215 e1000_consume_page(buffer_info, rxtop, length); |
|
4216 goto next_desc; |
|
4217 } else { |
|
4218 if (rxtop) { |
|
4219 /* end of the chain */ |
|
4220 skb_fill_page_desc(rxtop, |
|
4221 skb_shinfo(rxtop)->nr_frags, |
|
4222 buffer_info->page, 0, length); |
|
4223 /* re-use the current skb, we only consumed the |
|
4224 * page |
|
4225 */ |
|
4226 buffer_info->skb = skb; |
|
4227 skb = rxtop; |
|
4228 rxtop = NULL; |
|
4229 e1000_consume_page(buffer_info, skb, length); |
|
4230 } else { |
|
4231 /* no chain, got EOP, this buf is the packet |
|
4232 * copybreak to save the put_page/alloc_page |
|
4233 */ |
|
4234 if (length <= copybreak && |
|
4235 skb_tailroom(skb) >= length) { |
|
4236 u8 *vaddr; |
|
4237 vaddr = kmap_atomic(buffer_info->page); |
|
4238 memcpy(skb_tail_pointer(skb), vaddr, |
|
4239 length); |
|
4240 kunmap_atomic(vaddr); |
|
4241 /* re-use the page, so don't erase |
|
4242 * buffer_info->page |
|
4243 */ |
|
4244 skb_put(skb, length); |
|
4245 } else { |
|
4246 skb_fill_page_desc(skb, 0, |
|
4247 buffer_info->page, 0, |
|
4248 length); |
|
4249 e1000_consume_page(buffer_info, skb, |
|
4250 length); |
|
4251 } |
|
4252 } |
|
4253 } |
|
4254 |
|
4255 /* Receive Checksum Offload XXX recompute due to CRC strip? */ |
|
4256 e1000_rx_checksum(adapter, |
|
4257 (u32)(status) | |
|
4258 ((u32)(rx_desc->errors) << 24), |
|
4259 le16_to_cpu(rx_desc->csum), skb); |
|
4260 |
|
4261 total_rx_bytes += (skb->len - 4); /* don't count FCS */ |
|
4262 if (likely(!(netdev->features & NETIF_F_RXFCS))) |
|
4263 pskb_trim(skb, skb->len - 4); |
|
4264 total_rx_packets++; |
|
4265 |
|
4266 /* eth type trans needs skb->data to point to something */ |
|
4267 if (!pskb_may_pull(skb, ETH_HLEN)) { |
|
4268 e_err(drv, "pskb_may_pull failed.\n"); |
|
4269 if (!adapter->ecdev) { |
|
4270 dev_kfree_skb(skb); |
|
4271 } |
|
4272 goto next_desc; |
|
4273 } |
|
4274 |
|
4275 if (adapter->ecdev) { |
|
4276 ecdev_receive(adapter->ecdev, skb->data, length); |
|
4277 |
|
4278 // No need to detect link status as |
|
4279 // long as frames are received: Reset watchdog. |
|
4280 adapter->ec_watchdog_jiffies = jiffies; |
|
4281 } else { |
|
4282 e1000_receive_skb(adapter, status, rx_desc->special, skb); |
|
4283 } |
|
4284 |
|
4285 next_desc: |
|
4286 rx_desc->status = 0; |
|
4287 |
|
4288 /* return some buffers to hardware, one at a time is too slow */ |
|
4289 if (unlikely(cleaned_count >= E1000_RX_BUFFER_WRITE)) { |
|
4290 adapter->alloc_rx_buf(adapter, rx_ring, cleaned_count); |
|
4291 cleaned_count = 0; |
|
4292 } |
|
4293 |
|
4294 /* use prefetched values */ |
|
4295 rx_desc = next_rxd; |
|
4296 buffer_info = next_buffer; |
|
4297 } |
|
4298 rx_ring->next_to_clean = i; |
|
4299 |
|
4300 cleaned_count = E1000_DESC_UNUSED(rx_ring); |
|
4301 if (cleaned_count) |
|
4302 adapter->alloc_rx_buf(adapter, rx_ring, cleaned_count); |
|
4303 |
|
4304 adapter->total_rx_packets += total_rx_packets; |
|
4305 adapter->total_rx_bytes += total_rx_bytes; |
|
4306 netdev->stats.rx_bytes += total_rx_bytes; |
|
4307 netdev->stats.rx_packets += total_rx_packets; |
|
4308 return cleaned; |
|
4309 } |
|
4310 |
|
4311 /* this should improve performance for small packets with large amounts |
|
4312 * of reassembly being done in the stack |
|
4313 */ |
|
4314 static void e1000_check_copybreak(struct net_device *netdev, |
|
4315 struct e1000_buffer *buffer_info, |
|
4316 u32 length, struct sk_buff **skb) |
|
4317 { |
|
4318 struct e1000_adapter *adapter = netdev_priv(netdev); |
|
4319 struct sk_buff *new_skb; |
|
4320 |
|
4321 if (adapter->ecdev || length > copybreak) |
|
4322 return; |
|
4323 |
|
4324 new_skb = netdev_alloc_skb_ip_align(netdev, length); |
|
4325 if (!new_skb) |
|
4326 return; |
|
4327 |
|
4328 skb_copy_to_linear_data_offset(new_skb, -NET_IP_ALIGN, |
|
4329 (*skb)->data - NET_IP_ALIGN, |
|
4330 length + NET_IP_ALIGN); |
|
4331 /* save the skb in buffer_info as good */ |
|
4332 buffer_info->skb = *skb; |
|
4333 *skb = new_skb; |
|
4334 } |
|
4335 |
|
4336 /** |
|
4337 * e1000_clean_rx_irq - Send received data up the network stack; legacy |
|
4338 * @adapter: board private structure |
|
4339 * @rx_ring: ring to clean |
|
4340 * @work_done: amount of napi work completed this call |
|
4341 * @work_to_do: max amount of work allowed for this call to do |
|
4342 */ |
|
4343 static bool e1000_clean_rx_irq(struct e1000_adapter *adapter, |
|
4344 struct e1000_rx_ring *rx_ring, |
|
4345 int *work_done, int work_to_do) |
|
4346 { |
|
4347 struct e1000_hw *hw = &adapter->hw; |
|
4348 struct net_device *netdev = adapter->netdev; |
|
4349 struct pci_dev *pdev = adapter->pdev; |
|
4350 struct e1000_rx_desc *rx_desc, *next_rxd; |
|
4351 struct e1000_buffer *buffer_info, *next_buffer; |
|
4352 unsigned long flags; |
|
4353 u32 length; |
|
4354 unsigned int i; |
|
4355 int cleaned_count = 0; |
|
4356 bool cleaned = false; |
|
4357 unsigned int total_rx_bytes=0, total_rx_packets=0; |
|
4358 |
|
4359 i = rx_ring->next_to_clean; |
|
4360 rx_desc = E1000_RX_DESC(*rx_ring, i); |
|
4361 buffer_info = &rx_ring->buffer_info[i]; |
|
4362 |
|
4363 while (rx_desc->status & E1000_RXD_STAT_DD) { |
|
4364 struct sk_buff *skb; |
|
4365 u8 status; |
|
4366 |
|
4367 if (*work_done >= work_to_do) |
|
4368 break; |
|
4369 (*work_done)++; |
|
4370 rmb(); /* read descriptor and rx_buffer_info after status DD */ |
|
4371 |
|
4372 status = rx_desc->status; |
|
4373 skb = buffer_info->skb; |
|
4374 if (!adapter->ecdev) { |
|
4375 buffer_info->skb = NULL; |
|
4376 } |
|
4377 |
|
4378 prefetch(skb->data - NET_IP_ALIGN); |
|
4379 |
|
4380 if (++i == rx_ring->count) i = 0; |
|
4381 next_rxd = E1000_RX_DESC(*rx_ring, i); |
|
4382 prefetch(next_rxd); |
|
4383 |
|
4384 next_buffer = &rx_ring->buffer_info[i]; |
|
4385 |
|
4386 cleaned = true; |
|
4387 cleaned_count++; |
|
4388 dma_unmap_single(&pdev->dev, buffer_info->dma, |
|
4389 buffer_info->length, DMA_FROM_DEVICE); |
|
4390 buffer_info->dma = 0; |
|
4391 |
|
4392 length = le16_to_cpu(rx_desc->length); |
|
4393 /* !EOP means multiple descriptors were used to store a single |
|
4394 * packet, if thats the case we need to toss it. In fact, we |
|
4395 * to toss every packet with the EOP bit clear and the next |
|
4396 * frame that _does_ have the EOP bit set, as it is by |
|
4397 * definition only a frame fragment |
|
4398 */ |
|
4399 if (unlikely(!(status & E1000_RXD_STAT_EOP))) |
|
4400 adapter->discarding = true; |
|
4401 |
|
4402 if (adapter->discarding) { |
|
4403 /* All receives must fit into a single buffer */ |
|
4404 e_dbg("Receive packet consumed multiple buffers\n"); |
|
4405 /* recycle */ |
|
4406 buffer_info->skb = skb; |
|
4407 if (status & E1000_RXD_STAT_EOP) |
|
4408 adapter->discarding = false; |
|
4409 goto next_desc; |
|
4410 } |
|
4411 |
|
4412 if (!adapter->ecdev && |
|
4413 unlikely(rx_desc->errors & E1000_RXD_ERR_FRAME_ERR_MASK)) { |
|
4414 u8 last_byte = *(skb->data + length - 1); |
|
4415 if (TBI_ACCEPT(hw, status, rx_desc->errors, length, |
|
4416 last_byte)) { |
|
4417 spin_lock_irqsave(&adapter->stats_lock, flags); |
|
4418 e1000_tbi_adjust_stats(hw, &adapter->stats, |
|
4419 length, skb->data); |
|
4420 spin_unlock_irqrestore(&adapter->stats_lock, |
|
4421 flags); |
|
4422 length--; |
|
4423 } else { |
|
4424 if (netdev->features & NETIF_F_RXALL) |
|
4425 goto process_skb; |
|
4426 /* recycle */ |
|
4427 buffer_info->skb = skb; |
|
4428 goto next_desc; |
|
4429 } |
|
4430 } |
|
4431 |
|
4432 process_skb: |
|
4433 total_rx_bytes += (length - 4); /* don't count FCS */ |
|
4434 total_rx_packets++; |
|
4435 |
|
4436 if (likely(!(netdev->features & NETIF_F_RXFCS))) |
|
4437 /* adjust length to remove Ethernet CRC, this must be |
|
4438 * done after the TBI_ACCEPT workaround above |
|
4439 */ |
|
4440 length -= 4; |
|
4441 |
|
4442 e1000_check_copybreak(netdev, buffer_info, length, &skb); |
|
4443 |
|
4444 skb_put(skb, length); |
|
4445 |
|
4446 /* Receive Checksum Offload */ |
|
4447 e1000_rx_checksum(adapter, |
|
4448 (u32)(status) | |
|
4449 ((u32)(rx_desc->errors) << 24), |
|
4450 le16_to_cpu(rx_desc->csum), skb); |
|
4451 |
|
4452 if (adapter->ecdev) { |
|
4453 ecdev_receive(adapter->ecdev, skb->data, length); |
|
4454 |
|
4455 // No need to detect link status as |
|
4456 // long as frames are received: Reset watchdog. |
|
4457 adapter->ec_watchdog_jiffies = jiffies; |
|
4458 } else { |
|
4459 e1000_receive_skb(adapter, status, rx_desc->special, skb); |
|
4460 } |
|
4461 |
|
4462 next_desc: |
|
4463 rx_desc->status = 0; |
|
4464 |
|
4465 /* return some buffers to hardware, one at a time is too slow */ |
|
4466 if (unlikely(cleaned_count >= E1000_RX_BUFFER_WRITE)) { |
|
4467 adapter->alloc_rx_buf(adapter, rx_ring, cleaned_count); |
|
4468 cleaned_count = 0; |
|
4469 } |
|
4470 |
|
4471 /* use prefetched values */ |
|
4472 rx_desc = next_rxd; |
|
4473 buffer_info = next_buffer; |
|
4474 } |
|
4475 rx_ring->next_to_clean = i; |
|
4476 |
|
4477 cleaned_count = E1000_DESC_UNUSED(rx_ring); |
|
4478 if (cleaned_count) |
|
4479 adapter->alloc_rx_buf(adapter, rx_ring, cleaned_count); |
|
4480 |
|
4481 adapter->total_rx_packets += total_rx_packets; |
|
4482 adapter->total_rx_bytes += total_rx_bytes; |
|
4483 netdev->stats.rx_bytes += total_rx_bytes; |
|
4484 netdev->stats.rx_packets += total_rx_packets; |
|
4485 return cleaned; |
|
4486 } |
|
4487 |
|
4488 /** |
|
4489 * e1000_alloc_jumbo_rx_buffers - Replace used jumbo receive buffers |
|
4490 * @adapter: address of board private structure |
|
4491 * @rx_ring: pointer to receive ring structure |
|
4492 * @cleaned_count: number of buffers to allocate this pass |
|
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 buffer_info->skb = skb; |
|
4524 buffer_info->length = adapter->rx_buffer_len; |
|
4525 check_page: |
|
4526 /* allocate a new page if necessary */ |
|
4527 if (!buffer_info->page) { |
|
4528 buffer_info->page = alloc_page(GFP_ATOMIC); |
|
4529 if (unlikely(!buffer_info->page)) { |
|
4530 adapter->alloc_rx_buff_failed++; |
|
4531 break; |
|
4532 } |
|
4533 } |
|
4534 |
|
4535 if (!buffer_info->dma) { |
|
4536 buffer_info->dma = dma_map_page(&pdev->dev, |
|
4537 buffer_info->page, 0, |
|
4538 buffer_info->length, |
|
4539 DMA_FROM_DEVICE); |
|
4540 if (dma_mapping_error(&pdev->dev, buffer_info->dma)) { |
|
4541 put_page(buffer_info->page); |
|
4542 dev_kfree_skb(skb); |
|
4543 buffer_info->page = NULL; |
|
4544 buffer_info->skb = NULL; |
|
4545 buffer_info->dma = 0; |
|
4546 adapter->alloc_rx_buff_failed++; |
|
4547 break; /* while !buffer_info->skb */ |
|
4548 } |
|
4549 } |
|
4550 |
|
4551 rx_desc = E1000_RX_DESC(*rx_ring, i); |
|
4552 rx_desc->buffer_addr = cpu_to_le64(buffer_info->dma); |
|
4553 |
|
4554 if (unlikely(++i == rx_ring->count)) |
|
4555 i = 0; |
|
4556 buffer_info = &rx_ring->buffer_info[i]; |
|
4557 } |
|
4558 |
|
4559 if (likely(rx_ring->next_to_use != i)) { |
|
4560 rx_ring->next_to_use = i; |
|
4561 if (unlikely(i-- == 0)) |
|
4562 i = (rx_ring->count - 1); |
|
4563 |
|
4564 /* Force memory writes to complete before letting h/w |
|
4565 * know there are new descriptors to fetch. (Only |
|
4566 * applicable for weak-ordered memory model archs, |
|
4567 * such as IA-64). |
|
4568 */ |
|
4569 wmb(); |
|
4570 writel(i, adapter->hw.hw_addr + rx_ring->rdt); |
|
4571 } |
|
4572 } |
|
4573 |
|
4574 /** |
|
4575 * e1000_alloc_rx_buffers - Replace used receive buffers; legacy & extended |
|
4576 * @adapter: address of board private structure |
|
4577 **/ |
|
4578 static void e1000_alloc_rx_buffers(struct e1000_adapter *adapter, |
|
4579 struct e1000_rx_ring *rx_ring, |
|
4580 int cleaned_count) |
|
4581 { |
|
4582 struct e1000_hw *hw = &adapter->hw; |
|
4583 struct net_device *netdev = adapter->netdev; |
|
4584 struct pci_dev *pdev = adapter->pdev; |
|
4585 struct e1000_rx_desc *rx_desc; |
|
4586 struct e1000_buffer *buffer_info; |
|
4587 struct sk_buff *skb; |
|
4588 unsigned int i; |
|
4589 unsigned int bufsz = adapter->rx_buffer_len; |
|
4590 |
|
4591 i = rx_ring->next_to_use; |
|
4592 buffer_info = &rx_ring->buffer_info[i]; |
|
4593 |
|
4594 while (cleaned_count--) { |
|
4595 skb = buffer_info->skb; |
|
4596 if (skb) { |
|
4597 skb_trim(skb, 0); |
|
4598 goto map_skb; |
|
4599 } |
|
4600 |
|
4601 skb = netdev_alloc_skb_ip_align(netdev, bufsz); |
|
4602 if (unlikely(!skb)) { |
|
4603 /* Better luck next round */ |
|
4604 adapter->alloc_rx_buff_failed++; |
|
4605 break; |
|
4606 } |
|
4607 |
|
4608 /* Fix for errata 23, can't cross 64kB boundary */ |
|
4609 if (!e1000_check_64k_bound(adapter, skb->data, bufsz)) { |
|
4610 struct sk_buff *oldskb = skb; |
|
4611 e_err(rx_err, "skb align check failed: %u bytes at " |
|
4612 "%p\n", bufsz, skb->data); |
|
4613 /* Try again, without freeing the previous */ |
|
4614 skb = netdev_alloc_skb_ip_align(netdev, bufsz); |
|
4615 /* Failed allocation, critical failure */ |
|
4616 if (!skb) { |
|
4617 dev_kfree_skb(oldskb); |
|
4618 adapter->alloc_rx_buff_failed++; |
|
4619 break; |
|
4620 } |
|
4621 |
|
4622 if (!e1000_check_64k_bound(adapter, skb->data, bufsz)) { |
|
4623 /* give up */ |
|
4624 dev_kfree_skb(skb); |
|
4625 dev_kfree_skb(oldskb); |
|
4626 adapter->alloc_rx_buff_failed++; |
|
4627 break; /* while !buffer_info->skb */ |
|
4628 } |
|
4629 |
|
4630 /* Use new allocation */ |
|
4631 dev_kfree_skb(oldskb); |
|
4632 } |
|
4633 buffer_info->skb = skb; |
|
4634 buffer_info->length = adapter->rx_buffer_len; |
|
4635 map_skb: |
|
4636 buffer_info->dma = dma_map_single(&pdev->dev, |
|
4637 skb->data, |
|
4638 buffer_info->length, |
|
4639 DMA_FROM_DEVICE); |
|
4640 if (dma_mapping_error(&pdev->dev, buffer_info->dma)) { |
|
4641 dev_kfree_skb(skb); |
|
4642 buffer_info->skb = NULL; |
|
4643 buffer_info->dma = 0; |
|
4644 adapter->alloc_rx_buff_failed++; |
|
4645 break; /* while !buffer_info->skb */ |
|
4646 } |
|
4647 |
|
4648 /* XXX if it was allocated cleanly it will never map to a |
|
4649 * boundary crossing |
|
4650 */ |
|
4651 |
|
4652 /* Fix for errata 23, can't cross 64kB boundary */ |
|
4653 if (!e1000_check_64k_bound(adapter, |
|
4654 (void *)(unsigned long)buffer_info->dma, |
|
4655 adapter->rx_buffer_len)) { |
|
4656 e_err(rx_err, "dma align check failed: %u bytes at " |
|
4657 "%p\n", adapter->rx_buffer_len, |
|
4658 (void *)(unsigned long)buffer_info->dma); |
|
4659 dev_kfree_skb(skb); |
|
4660 buffer_info->skb = NULL; |
|
4661 |
|
4662 dma_unmap_single(&pdev->dev, buffer_info->dma, |
|
4663 adapter->rx_buffer_len, |
|
4664 DMA_FROM_DEVICE); |
|
4665 buffer_info->dma = 0; |
|
4666 |
|
4667 adapter->alloc_rx_buff_failed++; |
|
4668 break; /* while !buffer_info->skb */ |
|
4669 } |
|
4670 rx_desc = E1000_RX_DESC(*rx_ring, i); |
|
4671 rx_desc->buffer_addr = cpu_to_le64(buffer_info->dma); |
|
4672 |
|
4673 if (unlikely(++i == rx_ring->count)) |
|
4674 i = 0; |
|
4675 buffer_info = &rx_ring->buffer_info[i]; |
|
4676 } |
|
4677 |
|
4678 if (likely(rx_ring->next_to_use != i)) { |
|
4679 rx_ring->next_to_use = i; |
|
4680 if (unlikely(i-- == 0)) |
|
4681 i = (rx_ring->count - 1); |
|
4682 |
|
4683 /* Force memory writes to complete before letting h/w |
|
4684 * know there are new descriptors to fetch. (Only |
|
4685 * applicable for weak-ordered memory model archs, |
|
4686 * such as IA-64). |
|
4687 */ |
|
4688 wmb(); |
|
4689 writel(i, hw->hw_addr + rx_ring->rdt); |
|
4690 } |
|
4691 } |
|
4692 |
|
4693 /** |
|
4694 * e1000_smartspeed - Workaround for SmartSpeed on 82541 and 82547 controllers. |
|
4695 * @adapter: |
|
4696 **/ |
|
4697 static void e1000_smartspeed(struct e1000_adapter *adapter) |
|
4698 { |
|
4699 struct e1000_hw *hw = &adapter->hw; |
|
4700 u16 phy_status; |
|
4701 u16 phy_ctrl; |
|
4702 |
|
4703 if ((hw->phy_type != e1000_phy_igp) || !hw->autoneg || |
|
4704 !(hw->autoneg_advertised & ADVERTISE_1000_FULL)) |
|
4705 return; |
|
4706 |
|
4707 if (adapter->smartspeed == 0) { |
|
4708 /* If Master/Slave config fault is asserted twice, |
|
4709 * we assume back-to-back |
|
4710 */ |
|
4711 e1000_read_phy_reg(hw, PHY_1000T_STATUS, &phy_status); |
|
4712 if (!(phy_status & SR_1000T_MS_CONFIG_FAULT)) return; |
|
4713 e1000_read_phy_reg(hw, PHY_1000T_STATUS, &phy_status); |
|
4714 if (!(phy_status & SR_1000T_MS_CONFIG_FAULT)) return; |
|
4715 e1000_read_phy_reg(hw, PHY_1000T_CTRL, &phy_ctrl); |
|
4716 if (phy_ctrl & CR_1000T_MS_ENABLE) { |
|
4717 phy_ctrl &= ~CR_1000T_MS_ENABLE; |
|
4718 e1000_write_phy_reg(hw, PHY_1000T_CTRL, |
|
4719 phy_ctrl); |
|
4720 adapter->smartspeed++; |
|
4721 if (!e1000_phy_setup_autoneg(hw) && |
|
4722 !e1000_read_phy_reg(hw, PHY_CTRL, |
|
4723 &phy_ctrl)) { |
|
4724 phy_ctrl |= (MII_CR_AUTO_NEG_EN | |
|
4725 MII_CR_RESTART_AUTO_NEG); |
|
4726 e1000_write_phy_reg(hw, PHY_CTRL, |
|
4727 phy_ctrl); |
|
4728 } |
|
4729 } |
|
4730 return; |
|
4731 } else if (adapter->smartspeed == E1000_SMARTSPEED_DOWNSHIFT) { |
|
4732 /* If still no link, perhaps using 2/3 pair cable */ |
|
4733 e1000_read_phy_reg(hw, PHY_1000T_CTRL, &phy_ctrl); |
|
4734 phy_ctrl |= CR_1000T_MS_ENABLE; |
|
4735 e1000_write_phy_reg(hw, PHY_1000T_CTRL, phy_ctrl); |
|
4736 if (!e1000_phy_setup_autoneg(hw) && |
|
4737 !e1000_read_phy_reg(hw, PHY_CTRL, &phy_ctrl)) { |
|
4738 phy_ctrl |= (MII_CR_AUTO_NEG_EN | |
|
4739 MII_CR_RESTART_AUTO_NEG); |
|
4740 e1000_write_phy_reg(hw, PHY_CTRL, phy_ctrl); |
|
4741 } |
|
4742 } |
|
4743 /* Restart process after E1000_SMARTSPEED_MAX iterations */ |
|
4744 if (adapter->smartspeed++ == E1000_SMARTSPEED_MAX) |
|
4745 adapter->smartspeed = 0; |
|
4746 } |
|
4747 |
|
4748 /** |
|
4749 * e1000_ioctl - |
|
4750 * @netdev: |
|
4751 * @ifreq: |
|
4752 * @cmd: |
|
4753 **/ |
|
4754 static int e1000_ioctl(struct net_device *netdev, struct ifreq *ifr, int cmd) |
|
4755 { |
|
4756 switch (cmd) { |
|
4757 case SIOCGMIIPHY: |
|
4758 case SIOCGMIIREG: |
|
4759 case SIOCSMIIREG: |
|
4760 return e1000_mii_ioctl(netdev, ifr, cmd); |
|
4761 default: |
|
4762 return -EOPNOTSUPP; |
|
4763 } |
|
4764 } |
|
4765 |
|
4766 /** |
|
4767 * e1000_mii_ioctl - |
|
4768 * @netdev: |
|
4769 * @ifreq: |
|
4770 * @cmd: |
|
4771 **/ |
|
4772 static int e1000_mii_ioctl(struct net_device *netdev, struct ifreq *ifr, |
|
4773 int cmd) |
|
4774 { |
|
4775 struct e1000_adapter *adapter = netdev_priv(netdev); |
|
4776 struct e1000_hw *hw = &adapter->hw; |
|
4777 struct mii_ioctl_data *data = if_mii(ifr); |
|
4778 int retval; |
|
4779 u16 mii_reg; |
|
4780 unsigned long flags; |
|
4781 |
|
4782 if (hw->media_type != e1000_media_type_copper) |
|
4783 return -EOPNOTSUPP; |
|
4784 |
|
4785 switch (cmd) { |
|
4786 case SIOCGMIIPHY: |
|
4787 data->phy_id = hw->phy_addr; |
|
4788 break; |
|
4789 case SIOCGMIIREG: |
|
4790 if (adapter->ecdev) { |
|
4791 return -EPERM; |
|
4792 } |
|
4793 spin_lock_irqsave(&adapter->stats_lock, flags); |
|
4794 if (e1000_read_phy_reg(hw, data->reg_num & 0x1F, |
|
4795 &data->val_out)) { |
|
4796 spin_unlock_irqrestore(&adapter->stats_lock, flags); |
|
4797 return -EIO; |
|
4798 } |
|
4799 spin_unlock_irqrestore(&adapter->stats_lock, flags); |
|
4800 break; |
|
4801 case SIOCSMIIREG: |
|
4802 if (adapter->ecdev) { |
|
4803 return -EPERM; |
|
4804 } |
|
4805 if (data->reg_num & ~(0x1F)) |
|
4806 return -EFAULT; |
|
4807 mii_reg = data->val_in; |
|
4808 spin_lock_irqsave(&adapter->stats_lock, flags); |
|
4809 if (e1000_write_phy_reg(hw, data->reg_num, |
|
4810 mii_reg)) { |
|
4811 spin_unlock_irqrestore(&adapter->stats_lock, flags); |
|
4812 return -EIO; |
|
4813 } |
|
4814 spin_unlock_irqrestore(&adapter->stats_lock, flags); |
|
4815 if (hw->media_type == e1000_media_type_copper) { |
|
4816 switch (data->reg_num) { |
|
4817 case PHY_CTRL: |
|
4818 if (mii_reg & MII_CR_POWER_DOWN) |
|
4819 break; |
|
4820 if (mii_reg & MII_CR_AUTO_NEG_EN) { |
|
4821 hw->autoneg = 1; |
|
4822 hw->autoneg_advertised = 0x2F; |
|
4823 } else { |
|
4824 u32 speed; |
|
4825 if (mii_reg & 0x40) |
|
4826 speed = SPEED_1000; |
|
4827 else if (mii_reg & 0x2000) |
|
4828 speed = SPEED_100; |
|
4829 else |
|
4830 speed = SPEED_10; |
|
4831 retval = e1000_set_spd_dplx( |
|
4832 adapter, speed, |
|
4833 ((mii_reg & 0x100) |
|
4834 ? DUPLEX_FULL : |
|
4835 DUPLEX_HALF)); |
|
4836 if (retval) |
|
4837 return retval; |
|
4838 } |
|
4839 if (netif_running(adapter->netdev)) |
|
4840 e1000_reinit_locked(adapter); |
|
4841 else |
|
4842 e1000_reset(adapter); |
|
4843 break; |
|
4844 case M88E1000_PHY_SPEC_CTRL: |
|
4845 case M88E1000_EXT_PHY_SPEC_CTRL: |
|
4846 if (e1000_phy_reset(hw)) |
|
4847 return -EIO; |
|
4848 break; |
|
4849 } |
|
4850 } else { |
|
4851 switch (data->reg_num) { |
|
4852 case PHY_CTRL: |
|
4853 if (mii_reg & MII_CR_POWER_DOWN) |
|
4854 break; |
|
4855 if (netif_running(adapter->netdev)) |
|
4856 e1000_reinit_locked(adapter); |
|
4857 else |
|
4858 e1000_reset(adapter); |
|
4859 break; |
|
4860 } |
|
4861 } |
|
4862 break; |
|
4863 default: |
|
4864 return -EOPNOTSUPP; |
|
4865 } |
|
4866 return E1000_SUCCESS; |
|
4867 } |
|
4868 |
|
4869 void e1000_pci_set_mwi(struct e1000_hw *hw) |
|
4870 { |
|
4871 struct e1000_adapter *adapter = hw->back; |
|
4872 int ret_val = pci_set_mwi(adapter->pdev); |
|
4873 |
|
4874 if (ret_val) |
|
4875 e_err(probe, "Error in setting MWI\n"); |
|
4876 } |
|
4877 |
|
4878 void e1000_pci_clear_mwi(struct e1000_hw *hw) |
|
4879 { |
|
4880 struct e1000_adapter *adapter = hw->back; |
|
4881 |
|
4882 pci_clear_mwi(adapter->pdev); |
|
4883 } |
|
4884 |
|
4885 int e1000_pcix_get_mmrbc(struct e1000_hw *hw) |
|
4886 { |
|
4887 struct e1000_adapter *adapter = hw->back; |
|
4888 return pcix_get_mmrbc(adapter->pdev); |
|
4889 } |
|
4890 |
|
4891 void e1000_pcix_set_mmrbc(struct e1000_hw *hw, int mmrbc) |
|
4892 { |
|
4893 struct e1000_adapter *adapter = hw->back; |
|
4894 pcix_set_mmrbc(adapter->pdev, mmrbc); |
|
4895 } |
|
4896 |
|
4897 void e1000_io_write(struct e1000_hw *hw, unsigned long port, u32 value) |
|
4898 { |
|
4899 outl(value, port); |
|
4900 } |
|
4901 |
|
4902 static bool e1000_vlan_used(struct e1000_adapter *adapter) |
|
4903 { |
|
4904 u16 vid; |
|
4905 |
|
4906 for_each_set_bit(vid, adapter->active_vlans, VLAN_N_VID) |
|
4907 return true; |
|
4908 return false; |
|
4909 } |
|
4910 |
|
4911 static void __e1000_vlan_mode(struct e1000_adapter *adapter, |
|
4912 netdev_features_t features) |
|
4913 { |
|
4914 struct e1000_hw *hw = &adapter->hw; |
|
4915 u32 ctrl; |
|
4916 |
|
4917 ctrl = er32(CTRL); |
|
4918 if (features & NETIF_F_HW_VLAN_CTAG_RX) { |
|
4919 /* enable VLAN tag insert/strip */ |
|
4920 ctrl |= E1000_CTRL_VME; |
|
4921 } else { |
|
4922 /* disable VLAN tag insert/strip */ |
|
4923 ctrl &= ~E1000_CTRL_VME; |
|
4924 } |
|
4925 ew32(CTRL, ctrl); |
|
4926 } |
|
4927 static void e1000_vlan_filter_on_off(struct e1000_adapter *adapter, |
|
4928 bool filter_on) |
|
4929 { |
|
4930 struct e1000_hw *hw = &adapter->hw; |
|
4931 u32 rctl; |
|
4932 |
|
4933 if (!test_bit(__E1000_DOWN, &adapter->flags)) |
|
4934 e1000_irq_disable(adapter); |
|
4935 |
|
4936 __e1000_vlan_mode(adapter, adapter->netdev->features); |
|
4937 if (filter_on) { |
|
4938 /* enable VLAN receive filtering */ |
|
4939 rctl = er32(RCTL); |
|
4940 rctl &= ~E1000_RCTL_CFIEN; |
|
4941 if (!(adapter->netdev->flags & IFF_PROMISC)) |
|
4942 rctl |= E1000_RCTL_VFE; |
|
4943 ew32(RCTL, rctl); |
|
4944 e1000_update_mng_vlan(adapter); |
|
4945 } else { |
|
4946 /* disable VLAN receive filtering */ |
|
4947 rctl = er32(RCTL); |
|
4948 rctl &= ~E1000_RCTL_VFE; |
|
4949 ew32(RCTL, rctl); |
|
4950 } |
|
4951 |
|
4952 if (!test_bit(__E1000_DOWN, &adapter->flags)) |
|
4953 e1000_irq_enable(adapter); |
|
4954 } |
|
4955 |
|
4956 static void e1000_vlan_mode(struct net_device *netdev, |
|
4957 netdev_features_t features) |
|
4958 { |
|
4959 struct e1000_adapter *adapter = netdev_priv(netdev); |
|
4960 |
|
4961 if (!test_bit(__E1000_DOWN, &adapter->flags)) |
|
4962 e1000_irq_disable(adapter); |
|
4963 |
|
4964 __e1000_vlan_mode(adapter, features); |
|
4965 |
|
4966 if (!test_bit(__E1000_DOWN, &adapter->flags)) |
|
4967 e1000_irq_enable(adapter); |
|
4968 } |
|
4969 |
|
4970 static int e1000_vlan_rx_add_vid(struct net_device *netdev, |
|
4971 __be16 proto, u16 vid) |
|
4972 { |
|
4973 struct e1000_adapter *adapter = netdev_priv(netdev); |
|
4974 struct e1000_hw *hw = &adapter->hw; |
|
4975 u32 vfta, index; |
|
4976 |
|
4977 if ((hw->mng_cookie.status & |
|
4978 E1000_MNG_DHCP_COOKIE_STATUS_VLAN_SUPPORT) && |
|
4979 (vid == adapter->mng_vlan_id)) |
|
4980 return 0; |
|
4981 |
|
4982 if (!e1000_vlan_used(adapter)) |
|
4983 e1000_vlan_filter_on_off(adapter, true); |
|
4984 |
|
4985 /* add VID to filter table */ |
|
4986 index = (vid >> 5) & 0x7F; |
|
4987 vfta = E1000_READ_REG_ARRAY(hw, VFTA, index); |
|
4988 vfta |= (1 << (vid & 0x1F)); |
|
4989 e1000_write_vfta(hw, index, vfta); |
|
4990 |
|
4991 set_bit(vid, adapter->active_vlans); |
|
4992 |
|
4993 return 0; |
|
4994 } |
|
4995 |
|
4996 static int e1000_vlan_rx_kill_vid(struct net_device *netdev, |
|
4997 __be16 proto, u16 vid) |
|
4998 { |
|
4999 struct e1000_adapter *adapter = netdev_priv(netdev); |
|
5000 struct e1000_hw *hw = &adapter->hw; |
|
5001 u32 vfta, index; |
|
5002 |
|
5003 if (!test_bit(__E1000_DOWN, &adapter->flags)) |
|
5004 e1000_irq_disable(adapter); |
|
5005 if (!test_bit(__E1000_DOWN, &adapter->flags)) |
|
5006 e1000_irq_enable(adapter); |
|
5007 |
|
5008 /* remove VID from filter table */ |
|
5009 index = (vid >> 5) & 0x7F; |
|
5010 vfta = E1000_READ_REG_ARRAY(hw, VFTA, index); |
|
5011 vfta &= ~(1 << (vid & 0x1F)); |
|
5012 e1000_write_vfta(hw, index, vfta); |
|
5013 |
|
5014 clear_bit(vid, adapter->active_vlans); |
|
5015 |
|
5016 if (!e1000_vlan_used(adapter)) |
|
5017 e1000_vlan_filter_on_off(adapter, false); |
|
5018 |
|
5019 return 0; |
|
5020 } |
|
5021 |
|
5022 static void e1000_restore_vlan(struct e1000_adapter *adapter) |
|
5023 { |
|
5024 u16 vid; |
|
5025 |
|
5026 if (!e1000_vlan_used(adapter)) |
|
5027 return; |
|
5028 |
|
5029 e1000_vlan_filter_on_off(adapter, true); |
|
5030 for_each_set_bit(vid, adapter->active_vlans, VLAN_N_VID) |
|
5031 e1000_vlan_rx_add_vid(adapter->netdev, htons(ETH_P_8021Q), vid); |
|
5032 } |
|
5033 |
|
5034 int e1000_set_spd_dplx(struct e1000_adapter *adapter, u32 spd, u8 dplx) |
|
5035 { |
|
5036 struct e1000_hw *hw = &adapter->hw; |
|
5037 |
|
5038 hw->autoneg = 0; |
|
5039 |
|
5040 /* Make sure dplx is at most 1 bit and lsb of speed is not set |
|
5041 * for the switch() below to work |
|
5042 */ |
|
5043 if ((spd & 1) || (dplx & ~1)) |
|
5044 goto err_inval; |
|
5045 |
|
5046 /* Fiber NICs only allow 1000 gbps Full duplex */ |
|
5047 if ((hw->media_type == e1000_media_type_fiber) && |
|
5048 spd != SPEED_1000 && |
|
5049 dplx != DUPLEX_FULL) |
|
5050 goto err_inval; |
|
5051 |
|
5052 switch (spd + dplx) { |
|
5053 case SPEED_10 + DUPLEX_HALF: |
|
5054 hw->forced_speed_duplex = e1000_10_half; |
|
5055 break; |
|
5056 case SPEED_10 + DUPLEX_FULL: |
|
5057 hw->forced_speed_duplex = e1000_10_full; |
|
5058 break; |
|
5059 case SPEED_100 + DUPLEX_HALF: |
|
5060 hw->forced_speed_duplex = e1000_100_half; |
|
5061 break; |
|
5062 case SPEED_100 + DUPLEX_FULL: |
|
5063 hw->forced_speed_duplex = e1000_100_full; |
|
5064 break; |
|
5065 case SPEED_1000 + DUPLEX_FULL: |
|
5066 hw->autoneg = 1; |
|
5067 hw->autoneg_advertised = ADVERTISE_1000_FULL; |
|
5068 break; |
|
5069 case SPEED_1000 + DUPLEX_HALF: /* not supported */ |
|
5070 default: |
|
5071 goto err_inval; |
|
5072 } |
|
5073 |
|
5074 /* clear MDI, MDI(-X) override is only allowed when autoneg enabled */ |
|
5075 hw->mdix = AUTO_ALL_MODES; |
|
5076 |
|
5077 return 0; |
|
5078 |
|
5079 err_inval: |
|
5080 e_err(probe, "Unsupported Speed/Duplex configuration\n"); |
|
5081 return -EINVAL; |
|
5082 } |
|
5083 |
|
5084 static int __e1000_shutdown(struct pci_dev *pdev, bool *enable_wake) |
|
5085 { |
|
5086 struct net_device *netdev = pci_get_drvdata(pdev); |
|
5087 struct e1000_adapter *adapter = netdev_priv(netdev); |
|
5088 struct e1000_hw *hw = &adapter->hw; |
|
5089 u32 ctrl, ctrl_ext, rctl, status; |
|
5090 u32 wufc = adapter->wol; |
|
5091 #ifdef CONFIG_PM |
|
5092 int retval = 0; |
|
5093 #endif |
|
5094 |
|
5095 if (adapter->ecdev) { |
|
5096 return -EBUSY; |
|
5097 } |
|
5098 |
|
5099 netif_device_detach(netdev); |
|
5100 |
|
5101 if (netif_running(netdev)) { |
|
5102 int count = E1000_CHECK_RESET_COUNT; |
|
5103 |
|
5104 while (test_bit(__E1000_RESETTING, &adapter->flags) && count--) |
|
5105 usleep_range(10000, 20000); |
|
5106 |
|
5107 WARN_ON(test_bit(__E1000_RESETTING, &adapter->flags)); |
|
5108 e1000_down(adapter); |
|
5109 } |
|
5110 |
|
5111 #ifdef CONFIG_PM |
|
5112 retval = pci_save_state(pdev); |
|
5113 if (retval) |
|
5114 return retval; |
|
5115 #endif |
|
5116 |
|
5117 status = er32(STATUS); |
|
5118 if (status & E1000_STATUS_LU) |
|
5119 wufc &= ~E1000_WUFC_LNKC; |
|
5120 |
|
5121 if (wufc) { |
|
5122 e1000_setup_rctl(adapter); |
|
5123 e1000_set_rx_mode(netdev); |
|
5124 |
|
5125 rctl = er32(RCTL); |
|
5126 |
|
5127 /* turn on all-multi mode if wake on multicast is enabled */ |
|
5128 if (wufc & E1000_WUFC_MC) |
|
5129 rctl |= E1000_RCTL_MPE; |
|
5130 |
|
5131 /* enable receives in the hardware */ |
|
5132 ew32(RCTL, rctl | E1000_RCTL_EN); |
|
5133 |
|
5134 if (hw->mac_type >= e1000_82540) { |
|
5135 ctrl = er32(CTRL); |
|
5136 /* advertise wake from D3Cold */ |
|
5137 #define E1000_CTRL_ADVD3WUC 0x00100000 |
|
5138 /* phy power management enable */ |
|
5139 #define E1000_CTRL_EN_PHY_PWR_MGMT 0x00200000 |
|
5140 ctrl |= E1000_CTRL_ADVD3WUC | |
|
5141 E1000_CTRL_EN_PHY_PWR_MGMT; |
|
5142 ew32(CTRL, ctrl); |
|
5143 } |
|
5144 |
|
5145 if (hw->media_type == e1000_media_type_fiber || |
|
5146 hw->media_type == e1000_media_type_internal_serdes) { |
|
5147 /* keep the laser running in D3 */ |
|
5148 ctrl_ext = er32(CTRL_EXT); |
|
5149 ctrl_ext |= E1000_CTRL_EXT_SDP7_DATA; |
|
5150 ew32(CTRL_EXT, ctrl_ext); |
|
5151 } |
|
5152 |
|
5153 ew32(WUC, E1000_WUC_PME_EN); |
|
5154 ew32(WUFC, wufc); |
|
5155 } else { |
|
5156 ew32(WUC, 0); |
|
5157 ew32(WUFC, 0); |
|
5158 } |
|
5159 |
|
5160 e1000_release_manageability(adapter); |
|
5161 |
|
5162 *enable_wake = !!wufc; |
|
5163 |
|
5164 /* make sure adapter isn't asleep if manageability is enabled */ |
|
5165 if (adapter->en_mng_pt) |
|
5166 *enable_wake = true; |
|
5167 |
|
5168 if (netif_running(netdev)) |
|
5169 e1000_free_irq(adapter); |
|
5170 |
|
5171 pci_disable_device(pdev); |
|
5172 |
|
5173 return 0; |
|
5174 } |
|
5175 |
|
5176 #ifdef CONFIG_PM |
|
5177 static int e1000_suspend(struct pci_dev *pdev, pm_message_t state) |
|
5178 { |
|
5179 int retval; |
|
5180 bool wake; |
|
5181 |
|
5182 retval = __e1000_shutdown(pdev, &wake); |
|
5183 if (retval) |
|
5184 return retval; |
|
5185 |
|
5186 if (wake) { |
|
5187 pci_prepare_to_sleep(pdev); |
|
5188 } else { |
|
5189 pci_wake_from_d3(pdev, false); |
|
5190 pci_set_power_state(pdev, PCI_D3hot); |
|
5191 } |
|
5192 |
|
5193 return 0; |
|
5194 } |
|
5195 |
|
5196 static int e1000_resume(struct pci_dev *pdev) |
|
5197 { |
|
5198 struct net_device *netdev = pci_get_drvdata(pdev); |
|
5199 struct e1000_adapter *adapter = netdev_priv(netdev); |
|
5200 struct e1000_hw *hw = &adapter->hw; |
|
5201 u32 err; |
|
5202 |
|
5203 if (adapter->ecdev) { |
|
5204 return -EBUSY; |
|
5205 } |
|
5206 |
|
5207 pci_set_power_state(pdev, PCI_D0); |
|
5208 pci_restore_state(pdev); |
|
5209 pci_save_state(pdev); |
|
5210 |
|
5211 if (adapter->need_ioport) |
|
5212 err = pci_enable_device(pdev); |
|
5213 else |
|
5214 err = pci_enable_device_mem(pdev); |
|
5215 if (err) { |
|
5216 pr_err("Cannot enable PCI device from suspend\n"); |
|
5217 return err; |
|
5218 } |
|
5219 pci_set_master(pdev); |
|
5220 |
|
5221 pci_enable_wake(pdev, PCI_D3hot, 0); |
|
5222 pci_enable_wake(pdev, PCI_D3cold, 0); |
|
5223 |
|
5224 if (netif_running(netdev)) { |
|
5225 err = e1000_request_irq(adapter); |
|
5226 if (err) |
|
5227 return err; |
|
5228 } |
|
5229 |
|
5230 e1000_power_up_phy(adapter); |
|
5231 e1000_reset(adapter); |
|
5232 ew32(WUS, ~0); |
|
5233 |
|
5234 e1000_init_manageability(adapter); |
|
5235 |
|
5236 if (netif_running(netdev)) |
|
5237 e1000_up(adapter); |
|
5238 |
|
5239 if (!adapter->ecdev) { |
|
5240 netif_device_attach(netdev); |
|
5241 } |
|
5242 |
|
5243 return 0; |
|
5244 } |
|
5245 #endif |
|
5246 |
|
5247 static void e1000_shutdown(struct pci_dev *pdev) |
|
5248 { |
|
5249 bool wake; |
|
5250 |
|
5251 __e1000_shutdown(pdev, &wake); |
|
5252 |
|
5253 if (system_state == SYSTEM_POWER_OFF) { |
|
5254 pci_wake_from_d3(pdev, wake); |
|
5255 pci_set_power_state(pdev, PCI_D3hot); |
|
5256 } |
|
5257 } |
|
5258 |
|
5259 #ifdef CONFIG_NET_POLL_CONTROLLER |
|
5260 /* Polling 'interrupt' - used by things like netconsole to send skbs |
|
5261 * without having to re-enable interrupts. It's not called while |
|
5262 * the interrupt routine is executing. |
|
5263 */ |
|
5264 static void e1000_netpoll(struct net_device *netdev) |
|
5265 { |
|
5266 struct e1000_adapter *adapter = netdev_priv(netdev); |
|
5267 |
|
5268 disable_irq(adapter->pdev->irq); |
|
5269 e1000_intr(adapter->pdev->irq, netdev); |
|
5270 enable_irq(adapter->pdev->irq); |
|
5271 } |
|
5272 #endif |
|
5273 |
|
5274 /** |
|
5275 * e1000_io_error_detected - called when PCI error is detected |
|
5276 * @pdev: Pointer to PCI device |
|
5277 * @state: The current pci connection state |
|
5278 * |
|
5279 * This function is called after a PCI bus error affecting |
|
5280 * this device has been detected. |
|
5281 */ |
|
5282 static pci_ers_result_t e1000_io_error_detected(struct pci_dev *pdev, |
|
5283 pci_channel_state_t state) |
|
5284 { |
|
5285 struct net_device *netdev = pci_get_drvdata(pdev); |
|
5286 struct e1000_adapter *adapter = netdev_priv(netdev); |
|
5287 |
|
5288 netif_device_detach(netdev); |
|
5289 |
|
5290 if (state == pci_channel_io_perm_failure) |
|
5291 return PCI_ERS_RESULT_DISCONNECT; |
|
5292 |
|
5293 if (netif_running(netdev)) |
|
5294 e1000_down(adapter); |
|
5295 pci_disable_device(pdev); |
|
5296 |
|
5297 /* Request a slot slot reset. */ |
|
5298 return PCI_ERS_RESULT_NEED_RESET; |
|
5299 } |
|
5300 |
|
5301 /** |
|
5302 * e1000_io_slot_reset - called after the pci bus has been reset. |
|
5303 * @pdev: Pointer to PCI device |
|
5304 * |
|
5305 * Restart the card from scratch, as if from a cold-boot. Implementation |
|
5306 * resembles the first-half of the e1000_resume routine. |
|
5307 */ |
|
5308 static pci_ers_result_t e1000_io_slot_reset(struct pci_dev *pdev) |
|
5309 { |
|
5310 struct net_device *netdev = pci_get_drvdata(pdev); |
|
5311 struct e1000_adapter *adapter = netdev_priv(netdev); |
|
5312 struct e1000_hw *hw = &adapter->hw; |
|
5313 int err; |
|
5314 |
|
5315 if (adapter->need_ioport) |
|
5316 err = pci_enable_device(pdev); |
|
5317 else |
|
5318 err = pci_enable_device_mem(pdev); |
|
5319 if (err) { |
|
5320 pr_err("Cannot re-enable PCI device after reset.\n"); |
|
5321 return PCI_ERS_RESULT_DISCONNECT; |
|
5322 } |
|
5323 pci_set_master(pdev); |
|
5324 |
|
5325 pci_enable_wake(pdev, PCI_D3hot, 0); |
|
5326 pci_enable_wake(pdev, PCI_D3cold, 0); |
|
5327 |
|
5328 e1000_reset(adapter); |
|
5329 ew32(WUS, ~0); |
|
5330 |
|
5331 return PCI_ERS_RESULT_RECOVERED; |
|
5332 } |
|
5333 |
|
5334 /** |
|
5335 * e1000_io_resume - called when traffic can start flowing again. |
|
5336 * @pdev: Pointer to PCI device |
|
5337 * |
|
5338 * This callback is called when the error recovery driver tells us that |
|
5339 * its OK to resume normal operation. Implementation resembles the |
|
5340 * second-half of the e1000_resume routine. |
|
5341 */ |
|
5342 static void e1000_io_resume(struct pci_dev *pdev) |
|
5343 { |
|
5344 struct net_device *netdev = pci_get_drvdata(pdev); |
|
5345 struct e1000_adapter *adapter = netdev_priv(netdev); |
|
5346 |
|
5347 e1000_init_manageability(adapter); |
|
5348 |
|
5349 if (netif_running(netdev)) { |
|
5350 if (e1000_up(adapter)) { |
|
5351 pr_info("can't bring device back up after reset\n"); |
|
5352 return; |
|
5353 } |
|
5354 } |
|
5355 |
|
5356 netif_device_attach(netdev); |
|
5357 } |
|
5358 |
|
5359 /* e1000_main.c */ |