1 | /*- |
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2 | * Copyright (c) 1997, Stefan Esser <se@freebsd.org> |
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3 | * All rights reserved. |
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4 | * |
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5 | * Redistribution and use in source and binary forms, with or without |
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6 | * modification, are permitted provided that the following conditions |
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7 | * are met: |
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8 | * 1. Redistributions of source code must retain the above copyright |
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9 | * notice unmodified, this list of conditions, and the following |
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10 | * disclaimer. |
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11 | * 2. Redistributions in binary form must reproduce the above copyright |
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12 | * notice, this list of conditions and the following disclaimer in the |
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13 | * documentation and/or other materials provided with the distribution. |
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14 | * |
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15 | * THIS SOFTWARE IS PROVIDED BY THE AUTHOR ``AS IS'' AND ANY EXPRESS OR |
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16 | * IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES |
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17 | * OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE DISCLAIMED. |
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18 | * IN NO EVENT SHALL THE AUTHOR BE LIABLE FOR ANY DIRECT, INDIRECT, |
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19 | * INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT |
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20 | * NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, |
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21 | * DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY |
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22 | * THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT |
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23 | * (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF |
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24 | * THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE. |
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25 | * |
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26 | * $FreeBSD$ |
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27 | * |
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28 | */ |
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29 | |
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30 | #ifndef _PCIVAR_HH_ |
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31 | #define _PCIVAR_HH_ |
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32 | |
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33 | #include <freebsd/sys/queue.h> |
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34 | |
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35 | /* some PCI bus constants */ |
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36 | #define PCI_MAXMAPS_0 6 /* max. no. of memory/port maps */ |
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37 | #define PCI_MAXMAPS_1 2 /* max. no. of maps for PCI to PCI bridge */ |
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38 | #define PCI_MAXMAPS_2 1 /* max. no. of maps for CardBus bridge */ |
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39 | |
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40 | typedef uint64_t pci_addr_t; |
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41 | |
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42 | /* Interesting values for PCI power management */ |
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43 | struct pcicfg_pp { |
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44 | uint16_t pp_cap; /* PCI power management capabilities */ |
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45 | uint8_t pp_status; /* config space address of PCI power status reg */ |
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46 | uint8_t pp_pmcsr; /* config space address of PMCSR reg */ |
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47 | uint8_t pp_data; /* config space address of PCI power data reg */ |
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48 | }; |
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49 | |
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50 | struct vpd_readonly { |
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51 | char keyword[2]; |
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52 | char *value; |
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53 | }; |
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54 | |
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55 | struct vpd_write { |
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56 | char keyword[2]; |
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57 | char *value; |
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58 | int start; |
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59 | int len; |
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60 | }; |
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61 | |
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62 | struct pcicfg_vpd { |
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63 | uint8_t vpd_reg; /* base register, + 2 for addr, + 4 data */ |
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64 | char vpd_cached; |
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65 | char *vpd_ident; /* string identifier */ |
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66 | int vpd_rocnt; |
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67 | struct vpd_readonly *vpd_ros; |
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68 | int vpd_wcnt; |
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69 | struct vpd_write *vpd_w; |
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70 | }; |
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71 | |
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72 | /* Interesting values for PCI MSI */ |
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73 | struct pcicfg_msi { |
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74 | uint16_t msi_ctrl; /* Message Control */ |
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75 | uint8_t msi_location; /* Offset of MSI capability registers. */ |
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76 | uint8_t msi_msgnum; /* Number of messages */ |
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77 | int msi_alloc; /* Number of allocated messages. */ |
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78 | uint64_t msi_addr; /* Contents of address register. */ |
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79 | uint16_t msi_data; /* Contents of data register. */ |
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80 | u_int msi_handlers; |
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81 | }; |
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82 | |
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83 | /* Interesting values for PCI MSI-X */ |
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84 | struct msix_vector { |
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85 | uint64_t mv_address; /* Contents of address register. */ |
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86 | uint32_t mv_data; /* Contents of data register. */ |
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87 | int mv_irq; |
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88 | }; |
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89 | |
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90 | struct msix_table_entry { |
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91 | u_int mte_vector; /* 1-based index into msix_vectors array. */ |
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92 | u_int mte_handlers; |
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93 | }; |
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94 | |
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95 | struct pcicfg_msix { |
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96 | uint16_t msix_ctrl; /* Message Control */ |
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97 | uint16_t msix_msgnum; /* Number of messages */ |
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98 | uint8_t msix_location; /* Offset of MSI-X capability registers. */ |
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99 | uint8_t msix_table_bar; /* BAR containing vector table. */ |
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100 | uint8_t msix_pba_bar; /* BAR containing PBA. */ |
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101 | uint32_t msix_table_offset; |
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102 | uint32_t msix_pba_offset; |
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103 | int msix_alloc; /* Number of allocated vectors. */ |
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104 | int msix_table_len; /* Length of virtual table. */ |
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105 | struct msix_table_entry *msix_table; /* Virtual table. */ |
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106 | struct msix_vector *msix_vectors; /* Array of allocated vectors. */ |
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107 | struct resource *msix_table_res; /* Resource containing vector table. */ |
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108 | struct resource *msix_pba_res; /* Resource containing PBA. */ |
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109 | }; |
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110 | |
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111 | /* Interesting values for HyperTransport */ |
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112 | struct pcicfg_ht { |
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113 | uint8_t ht_msimap; /* Offset of MSI mapping cap registers. */ |
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114 | uint16_t ht_msictrl; /* MSI mapping control */ |
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115 | uint64_t ht_msiaddr; /* MSI mapping base address */ |
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116 | }; |
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117 | |
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118 | /* config header information common to all header types */ |
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119 | typedef struct pcicfg { |
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120 | struct device *dev; /* device which owns this */ |
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121 | |
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122 | uint32_t bar[PCI_MAXMAPS_0]; /* BARs */ |
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123 | uint32_t bios; /* BIOS mapping */ |
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124 | |
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125 | uint16_t subvendor; /* card vendor ID */ |
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126 | uint16_t subdevice; /* card device ID, assigned by card vendor */ |
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127 | uint16_t vendor; /* chip vendor ID */ |
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128 | uint16_t device; /* chip device ID, assigned by chip vendor */ |
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129 | |
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130 | uint16_t cmdreg; /* disable/enable chip and PCI options */ |
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131 | uint16_t statreg; /* supported PCI features and error state */ |
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132 | |
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133 | uint8_t baseclass; /* chip PCI class */ |
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134 | uint8_t subclass; /* chip PCI subclass */ |
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135 | uint8_t progif; /* chip PCI programming interface */ |
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136 | uint8_t revid; /* chip revision ID */ |
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137 | |
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138 | uint8_t hdrtype; /* chip config header type */ |
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139 | uint8_t cachelnsz; /* cache line size in 4byte units */ |
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140 | uint8_t intpin; /* PCI interrupt pin */ |
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141 | uint8_t intline; /* interrupt line (IRQ for PC arch) */ |
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142 | |
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143 | uint8_t mingnt; /* min. useful bus grant time in 250ns units */ |
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144 | uint8_t maxlat; /* max. tolerated bus grant latency in 250ns */ |
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145 | uint8_t lattimer; /* latency timer in units of 30ns bus cycles */ |
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146 | |
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147 | uint8_t mfdev; /* multi-function device (from hdrtype reg) */ |
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148 | uint8_t nummaps; /* actual number of PCI maps used */ |
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149 | |
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150 | uint32_t domain; /* PCI domain */ |
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151 | uint8_t bus; /* config space bus address */ |
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152 | uint8_t slot; /* config space slot address */ |
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153 | uint8_t func; /* config space function number */ |
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154 | |
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155 | struct pcicfg_pp pp; /* Power management */ |
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156 | struct pcicfg_vpd vpd; /* Vital product data */ |
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157 | struct pcicfg_msi msi; /* PCI MSI */ |
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158 | struct pcicfg_msix msix; /* PCI MSI-X */ |
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159 | struct pcicfg_ht ht; /* HyperTransport */ |
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160 | } pcicfgregs; |
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161 | |
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162 | /* additional type 1 device config header information (PCI to PCI bridge) */ |
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163 | |
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164 | #define PCI_PPBMEMBASE(h,l) ((((pci_addr_t)(h) << 32) + ((l)<<16)) & ~0xfffff) |
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165 | #define PCI_PPBMEMLIMIT(h,l) ((((pci_addr_t)(h) << 32) + ((l)<<16)) | 0xfffff) |
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166 | #define PCI_PPBIOBASE(h,l) ((((h)<<16) + ((l)<<8)) & ~0xfff) |
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167 | #define PCI_PPBIOLIMIT(h,l) ((((h)<<16) + ((l)<<8)) | 0xfff) |
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168 | |
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169 | typedef struct { |
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170 | pci_addr_t pmembase; /* base address of prefetchable memory */ |
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171 | pci_addr_t pmemlimit; /* topmost address of prefetchable memory */ |
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172 | uint32_t membase; /* base address of memory window */ |
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173 | uint32_t memlimit; /* topmost address of memory window */ |
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174 | uint32_t iobase; /* base address of port window */ |
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175 | uint32_t iolimit; /* topmost address of port window */ |
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176 | uint16_t secstat; /* secondary bus status register */ |
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177 | uint16_t bridgectl; /* bridge control register */ |
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178 | uint8_t seclat; /* CardBus latency timer */ |
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179 | } pcih1cfgregs; |
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180 | |
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181 | /* additional type 2 device config header information (CardBus bridge) */ |
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182 | |
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183 | typedef struct { |
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184 | uint32_t membase0; /* base address of memory window */ |
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185 | uint32_t memlimit0; /* topmost address of memory window */ |
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186 | uint32_t membase1; /* base address of memory window */ |
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187 | uint32_t memlimit1; /* topmost address of memory window */ |
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188 | uint32_t iobase0; /* base address of port window */ |
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189 | uint32_t iolimit0; /* topmost address of port window */ |
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190 | uint32_t iobase1; /* base address of port window */ |
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191 | uint32_t iolimit1; /* topmost address of port window */ |
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192 | uint32_t pccardif; /* PC Card 16bit IF legacy more base addr. */ |
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193 | uint16_t secstat; /* secondary bus status register */ |
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194 | uint16_t bridgectl; /* bridge control register */ |
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195 | uint8_t seclat; /* CardBus latency timer */ |
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196 | } pcih2cfgregs; |
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197 | |
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198 | extern uint32_t pci_numdevs; |
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199 | |
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200 | /* Only if the prerequisites are present */ |
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201 | #if defined(_SYS_BUS_HH_) && defined(_SYS_PCIIO_HH_) |
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202 | struct pci_devinfo { |
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203 | STAILQ_ENTRY(pci_devinfo) pci_links; |
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204 | struct resource_list resources; |
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205 | pcicfgregs cfg; |
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206 | struct pci_conf conf; |
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207 | }; |
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208 | #endif |
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209 | |
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210 | #ifdef _SYS_BUS_HH_ |
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211 | |
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212 | #include <freebsd/local/pci_if.h> |
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213 | |
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214 | enum pci_device_ivars { |
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215 | PCI_IVAR_SUBVENDOR, |
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216 | PCI_IVAR_SUBDEVICE, |
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217 | PCI_IVAR_VENDOR, |
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218 | PCI_IVAR_DEVICE, |
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219 | PCI_IVAR_DEVID, |
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220 | PCI_IVAR_CLASS, |
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221 | PCI_IVAR_SUBCLASS, |
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222 | PCI_IVAR_PROGIF, |
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223 | PCI_IVAR_REVID, |
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224 | PCI_IVAR_INTPIN, |
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225 | PCI_IVAR_IRQ, |
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226 | PCI_IVAR_DOMAIN, |
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227 | PCI_IVAR_BUS, |
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228 | PCI_IVAR_SLOT, |
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229 | PCI_IVAR_FUNCTION, |
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230 | PCI_IVAR_ETHADDR, |
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231 | PCI_IVAR_CMDREG, |
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232 | PCI_IVAR_CACHELNSZ, |
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233 | PCI_IVAR_MINGNT, |
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234 | PCI_IVAR_MAXLAT, |
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235 | PCI_IVAR_LATTIMER |
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236 | }; |
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237 | |
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238 | /* |
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239 | * Simplified accessors for pci devices |
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240 | */ |
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241 | #define PCI_ACCESSOR(var, ivar, type) \ |
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242 | __BUS_ACCESSOR(pci, var, PCI, ivar, type) |
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243 | |
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244 | PCI_ACCESSOR(subvendor, SUBVENDOR, uint16_t) |
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245 | PCI_ACCESSOR(subdevice, SUBDEVICE, uint16_t) |
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246 | PCI_ACCESSOR(vendor, VENDOR, uint16_t) |
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247 | PCI_ACCESSOR(device, DEVICE, uint16_t) |
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248 | PCI_ACCESSOR(devid, DEVID, uint32_t) |
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249 | PCI_ACCESSOR(class, CLASS, uint8_t) |
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250 | PCI_ACCESSOR(subclass, SUBCLASS, uint8_t) |
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251 | PCI_ACCESSOR(progif, PROGIF, uint8_t) |
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252 | PCI_ACCESSOR(revid, REVID, uint8_t) |
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253 | PCI_ACCESSOR(intpin, INTPIN, uint8_t) |
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254 | PCI_ACCESSOR(irq, IRQ, uint8_t) |
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255 | PCI_ACCESSOR(domain, DOMAIN, uint32_t) |
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256 | PCI_ACCESSOR(bus, BUS, uint8_t) |
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257 | PCI_ACCESSOR(slot, SLOT, uint8_t) |
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258 | PCI_ACCESSOR(function, FUNCTION, uint8_t) |
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259 | PCI_ACCESSOR(ether, ETHADDR, uint8_t *) |
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260 | PCI_ACCESSOR(cmdreg, CMDREG, uint8_t) |
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261 | PCI_ACCESSOR(cachelnsz, CACHELNSZ, uint8_t) |
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262 | PCI_ACCESSOR(mingnt, MINGNT, uint8_t) |
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263 | PCI_ACCESSOR(maxlat, MAXLAT, uint8_t) |
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264 | PCI_ACCESSOR(lattimer, LATTIMER, uint8_t) |
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265 | |
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266 | #undef PCI_ACCESSOR |
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267 | |
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268 | /* |
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269 | * Operations on configuration space. |
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270 | */ |
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271 | static __inline uint32_t |
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272 | pci_read_config(device_t dev, int reg, int width) |
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273 | { |
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274 | return PCI_READ_CONFIG(device_get_parent(dev), dev, reg, width); |
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275 | } |
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276 | |
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277 | static __inline void |
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278 | pci_write_config(device_t dev, int reg, uint32_t val, int width) |
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279 | { |
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280 | PCI_WRITE_CONFIG(device_get_parent(dev), dev, reg, val, width); |
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281 | } |
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282 | |
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283 | /* |
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284 | * Ivars for pci bridges. |
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285 | */ |
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286 | |
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287 | /*typedef enum pci_device_ivars pcib_device_ivars;*/ |
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288 | enum pcib_device_ivars { |
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289 | PCIB_IVAR_DOMAIN, |
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290 | PCIB_IVAR_BUS |
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291 | }; |
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292 | |
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293 | #define PCIB_ACCESSOR(var, ivar, type) \ |
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294 | __BUS_ACCESSOR(pcib, var, PCIB, ivar, type) |
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295 | |
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296 | PCIB_ACCESSOR(domain, DOMAIN, uint32_t) |
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297 | PCIB_ACCESSOR(bus, BUS, uint32_t) |
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298 | |
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299 | #undef PCIB_ACCESSOR |
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300 | |
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301 | /* |
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302 | * PCI interrupt validation. Invalid interrupt values such as 0 or 128 |
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303 | * on i386 or other platforms should be mapped out in the MD pcireadconf |
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304 | * code and not here, since the only MI invalid IRQ is 255. |
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305 | */ |
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306 | #define PCI_INVALID_IRQ 255 |
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307 | #define PCI_INTERRUPT_VALID(x) ((x) != PCI_INVALID_IRQ) |
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308 | |
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309 | |
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310 | /* |
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311 | * Convenience functions. |
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312 | * |
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313 | * These should be used in preference to manually manipulating |
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314 | * configuration space. |
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315 | */ |
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316 | static __inline int |
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317 | pci_enable_busmaster(device_t dev) |
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318 | { |
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319 | return(PCI_ENABLE_BUSMASTER(device_get_parent(dev), dev)); |
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320 | } |
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321 | |
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322 | #ifndef __rtems__ |
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323 | static __inline int |
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324 | pci_disable_busmaster(device_t dev) |
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325 | { |
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326 | return(PCI_DISABLE_BUSMASTER(device_get_parent(dev), dev)); |
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327 | } |
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328 | |
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329 | static __inline int |
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330 | pci_enable_io(device_t dev, int space) |
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331 | { |
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332 | return(PCI_ENABLE_IO(device_get_parent(dev), dev, space)); |
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333 | } |
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334 | |
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335 | static __inline int |
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336 | pci_disable_io(device_t dev, int space) |
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337 | { |
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338 | return(PCI_DISABLE_IO(device_get_parent(dev), dev, space)); |
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339 | } |
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340 | |
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341 | static __inline int |
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342 | pci_get_vpd_ident(device_t dev, const char **identptr) |
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343 | { |
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344 | return(PCI_GET_VPD_IDENT(device_get_parent(dev), dev, identptr)); |
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345 | } |
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346 | |
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347 | static __inline int |
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348 | pci_get_vpd_readonly(device_t dev, const char *kw, const char **identptr) |
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349 | { |
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350 | return(PCI_GET_VPD_READONLY(device_get_parent(dev), dev, kw, identptr)); |
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351 | } |
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352 | #endif /* __rtems__ */ |
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353 | |
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354 | /* |
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355 | * Check if the address range falls within the VGA defined address range(s) |
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356 | */ |
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357 | static __inline int |
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358 | pci_is_vga_ioport_range(u_long start, u_long end) |
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359 | { |
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360 | |
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361 | return (((start >= 0x3b0 && end <= 0x3bb) || |
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362 | (start >= 0x3c0 && end <= 0x3df)) ? 1 : 0); |
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363 | } |
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364 | |
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365 | static __inline int |
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366 | pci_is_vga_memory_range(u_long start, u_long end) |
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367 | { |
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368 | |
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369 | return ((start >= 0xa0000 && end <= 0xbffff) ? 1 : 0); |
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370 | } |
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371 | |
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372 | /* |
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373 | * PCI power states are as defined by ACPI: |
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374 | * |
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375 | * D0 State in which device is on and running. It is receiving full |
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376 | * power from the system and delivering full functionality to the user. |
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377 | * D1 Class-specific low-power state in which device context may or may not |
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378 | * be lost. Buses in D1 cannot do anything to the bus that would force |
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379 | * devices on that bus to lose context. |
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380 | * D2 Class-specific low-power state in which device context may or may |
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381 | * not be lost. Attains greater power savings than D1. Buses in D2 |
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382 | * can cause devices on that bus to lose some context. Devices in D2 |
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383 | * must be prepared for the bus to be in D2 or higher. |
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384 | * D3 State in which the device is off and not running. Device context is |
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385 | * lost. Power can be removed from the device. |
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386 | */ |
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387 | #define PCI_POWERSTATE_D0 0 |
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388 | #define PCI_POWERSTATE_D1 1 |
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389 | #define PCI_POWERSTATE_D2 2 |
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390 | #define PCI_POWERSTATE_D3 3 |
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391 | #define PCI_POWERSTATE_UNKNOWN -1 |
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392 | |
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393 | static __inline int |
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394 | pci_set_powerstate(device_t dev, int state) |
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395 | { |
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396 | return PCI_SET_POWERSTATE(device_get_parent(dev), dev, state); |
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397 | } |
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398 | |
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399 | static __inline int |
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400 | pci_get_powerstate(device_t dev) |
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401 | { |
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402 | return PCI_GET_POWERSTATE(device_get_parent(dev), dev); |
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403 | } |
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404 | |
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405 | static __inline int |
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406 | pci_find_extcap(device_t dev, int capability, int *capreg) |
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407 | { |
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408 | return PCI_FIND_EXTCAP(device_get_parent(dev), dev, capability, capreg); |
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409 | } |
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410 | |
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411 | static __inline int |
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412 | pci_alloc_msi(device_t dev, int *count) |
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413 | { |
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414 | return (PCI_ALLOC_MSI(device_get_parent(dev), dev, count)); |
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415 | } |
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416 | |
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417 | static __inline int |
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418 | pci_alloc_msix(device_t dev, int *count) |
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419 | { |
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420 | return (PCI_ALLOC_MSIX(device_get_parent(dev), dev, count)); |
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421 | } |
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422 | |
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423 | static __inline int |
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424 | pci_remap_msix(device_t dev, int count, const u_int *vectors) |
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425 | { |
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426 | return (PCI_REMAP_MSIX(device_get_parent(dev), dev, count, vectors)); |
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427 | } |
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428 | |
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429 | static __inline int |
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430 | pci_release_msi(device_t dev) |
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431 | { |
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432 | return (PCI_RELEASE_MSI(device_get_parent(dev), dev)); |
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433 | } |
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434 | |
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435 | static __inline int |
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436 | pci_msi_count(device_t dev) |
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437 | { |
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438 | return (PCI_MSI_COUNT(device_get_parent(dev), dev)); |
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439 | } |
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440 | |
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441 | static __inline int |
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442 | pci_msix_count(device_t dev) |
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443 | { |
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444 | return (PCI_MSIX_COUNT(device_get_parent(dev), dev)); |
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445 | } |
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446 | |
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447 | device_t pci_find_bsf(uint8_t, uint8_t, uint8_t); |
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448 | device_t pci_find_dbsf(uint32_t, uint8_t, uint8_t, uint8_t); |
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449 | #ifndef __rtems__ |
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450 | device_t pci_find_device(uint16_t, uint16_t); |
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451 | #endif /* __rtems__ */ |
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452 | |
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453 | /* Can be used by drivers to manage the MSI-X table. */ |
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454 | int pci_pending_msix(device_t dev, u_int index); |
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455 | |
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456 | int pci_msi_device_blacklisted(device_t dev); |
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457 | |
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458 | void pci_ht_map_msi(device_t dev, uint64_t addr); |
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459 | |
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460 | int pci_get_max_read_req(device_t dev); |
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461 | int pci_set_max_read_req(device_t dev, int size); |
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462 | |
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463 | #endif /* _SYS_BUS_HH_ */ |
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464 | |
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465 | /* |
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466 | * cdev switch for control device, initialised in generic PCI code |
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467 | */ |
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468 | extern struct cdevsw pcicdev; |
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469 | |
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470 | /* |
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471 | * List of all PCI devices, generation count for the list. |
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472 | */ |
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473 | STAILQ_HEAD(devlist, pci_devinfo); |
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474 | |
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475 | extern struct devlist pci_devq; |
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476 | extern uint32_t pci_generation; |
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477 | |
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478 | #endif /* _PCIVAR_HH_ */ |
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