root / hw / pci_bridge.c @ 99443c21
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1 | 783753fd | Isaku Yamahata | /*
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2 | 783753fd | Isaku Yamahata | * QEMU PCI bus manager
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3 | 783753fd | Isaku Yamahata | *
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4 | 783753fd | Isaku Yamahata | * Copyright (c) 2004 Fabrice Bellard
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5 | 783753fd | Isaku Yamahata | *
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6 | 783753fd | Isaku Yamahata | * Permission is hereby granted, free of charge, to any person obtaining a copy
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7 | 783753fd | Isaku Yamahata | * of this software and associated documentation files (the "Software"), to dea
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8 | 783753fd | Isaku Yamahata | |
9 | 783753fd | Isaku Yamahata | * in the Software without restriction, including without limitation the rights
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10 | 783753fd | Isaku Yamahata | * to use, copy, modify, merge, publish, distribute, sublicense, and/or sell
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11 | 783753fd | Isaku Yamahata | * copies of the Software, and to permit persons to whom the Software is
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12 | 783753fd | Isaku Yamahata | * furnished to do so, subject to the following conditions:
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13 | 783753fd | Isaku Yamahata | *
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14 | 783753fd | Isaku Yamahata | * The above copyright notice and this permission notice shall be included in
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15 | 783753fd | Isaku Yamahata | * all copies or substantial portions of the Software.
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16 | 783753fd | Isaku Yamahata | *
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17 | 783753fd | Isaku Yamahata | * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
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18 | 783753fd | Isaku Yamahata | * IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
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19 | 783753fd | Isaku Yamahata | * FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL
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20 | 783753fd | Isaku Yamahata | * THE AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER
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21 | 783753fd | Isaku Yamahata | * LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM
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22 | 783753fd | Isaku Yamahata | |
23 | 783753fd | Isaku Yamahata | * OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN
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24 | 783753fd | Isaku Yamahata | * THE SOFTWARE.
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25 | 783753fd | Isaku Yamahata | */
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26 | 783753fd | Isaku Yamahata | /*
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27 | 783753fd | Isaku Yamahata | * split out from pci.c
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28 | 783753fd | Isaku Yamahata | * Copyright (c) 2010 Isaku Yamahata <yamahata at valinux co jp>
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29 | 783753fd | Isaku Yamahata | * VA Linux Systems Japan K.K.
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30 | 783753fd | Isaku Yamahata | */
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31 | 783753fd | Isaku Yamahata | |
32 | 783753fd | Isaku Yamahata | #include "pci_bridge.h" |
33 | 783753fd | Isaku Yamahata | #include "pci_internals.h" |
34 | 783753fd | Isaku Yamahata | |
35 | f4c817e0 | Isaku Yamahata | /* PCI bridge subsystem vendor ID helper functions */
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36 | f4c817e0 | Isaku Yamahata | #define PCI_SSVID_SIZEOF 8 |
37 | f4c817e0 | Isaku Yamahata | #define PCI_SSVID_SVID 4 |
38 | f4c817e0 | Isaku Yamahata | #define PCI_SSVID_SSID 6 |
39 | f4c817e0 | Isaku Yamahata | |
40 | f4c817e0 | Isaku Yamahata | int pci_bridge_ssvid_init(PCIDevice *dev, uint8_t offset,
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41 | f4c817e0 | Isaku Yamahata | uint16_t svid, uint16_t ssid) |
42 | f4c817e0 | Isaku Yamahata | { |
43 | f4c817e0 | Isaku Yamahata | int pos;
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44 | f4c817e0 | Isaku Yamahata | pos = pci_add_capability(dev, PCI_CAP_ID_SSVID, offset, PCI_SSVID_SIZEOF); |
45 | f4c817e0 | Isaku Yamahata | if (pos < 0) { |
46 | f4c817e0 | Isaku Yamahata | return pos;
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47 | f4c817e0 | Isaku Yamahata | } |
48 | f4c817e0 | Isaku Yamahata | |
49 | f4c817e0 | Isaku Yamahata | pci_set_word(dev->config + pos + PCI_SSVID_SVID, svid); |
50 | f4c817e0 | Isaku Yamahata | pci_set_word(dev->config + pos + PCI_SSVID_SSID, ssid); |
51 | f4c817e0 | Isaku Yamahata | return pos;
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52 | f4c817e0 | Isaku Yamahata | } |
53 | f4c817e0 | Isaku Yamahata | |
54 | 68f79994 | Isaku Yamahata | /* Accessor function to get parent bridge device from pci bus. */
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55 | 783753fd | Isaku Yamahata | PCIDevice *pci_bridge_get_device(PCIBus *bus) |
56 | 783753fd | Isaku Yamahata | { |
57 | 783753fd | Isaku Yamahata | return bus->parent_dev;
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58 | 783753fd | Isaku Yamahata | } |
59 | 783753fd | Isaku Yamahata | |
60 | 68f79994 | Isaku Yamahata | /* Accessor function to get secondary bus from pci-to-pci bridge device */
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61 | 68f79994 | Isaku Yamahata | PCIBus *pci_bridge_get_sec_bus(PCIBridge *br) |
62 | 68f79994 | Isaku Yamahata | { |
63 | 68f79994 | Isaku Yamahata | return &br->sec_bus;
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64 | 68f79994 | Isaku Yamahata | } |
65 | 68f79994 | Isaku Yamahata | |
66 | 68f79994 | Isaku Yamahata | static uint32_t pci_config_get_io_base(const PCIDevice *d, |
67 | 783753fd | Isaku Yamahata | uint32_t base, uint32_t base_upper16) |
68 | 783753fd | Isaku Yamahata | { |
69 | 783753fd | Isaku Yamahata | uint32_t val; |
70 | 783753fd | Isaku Yamahata | |
71 | 783753fd | Isaku Yamahata | val = ((uint32_t)d->config[base] & PCI_IO_RANGE_MASK) << 8;
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72 | 783753fd | Isaku Yamahata | if (d->config[base] & PCI_IO_RANGE_TYPE_32) {
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73 | 783753fd | Isaku Yamahata | val |= (uint32_t)pci_get_word(d->config + base_upper16) << 16;
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74 | 783753fd | Isaku Yamahata | } |
75 | 783753fd | Isaku Yamahata | return val;
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76 | 783753fd | Isaku Yamahata | } |
77 | 783753fd | Isaku Yamahata | |
78 | 68f79994 | Isaku Yamahata | static pcibus_t pci_config_get_memory_base(const PCIDevice *d, uint32_t base) |
79 | 783753fd | Isaku Yamahata | { |
80 | 783753fd | Isaku Yamahata | return ((pcibus_t)pci_get_word(d->config + base) & PCI_MEMORY_RANGE_MASK)
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81 | 783753fd | Isaku Yamahata | << 16;
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82 | 783753fd | Isaku Yamahata | } |
83 | 783753fd | Isaku Yamahata | |
84 | 68f79994 | Isaku Yamahata | static pcibus_t pci_config_get_pref_base(const PCIDevice *d, |
85 | 783753fd | Isaku Yamahata | uint32_t base, uint32_t upper) |
86 | 783753fd | Isaku Yamahata | { |
87 | 783753fd | Isaku Yamahata | pcibus_t tmp; |
88 | 783753fd | Isaku Yamahata | pcibus_t val; |
89 | 783753fd | Isaku Yamahata | |
90 | 783753fd | Isaku Yamahata | tmp = (pcibus_t)pci_get_word(d->config + base); |
91 | 783753fd | Isaku Yamahata | val = (tmp & PCI_PREF_RANGE_MASK) << 16;
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92 | 783753fd | Isaku Yamahata | if (tmp & PCI_PREF_RANGE_TYPE_64) {
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93 | 783753fd | Isaku Yamahata | val |= (pcibus_t)pci_get_long(d->config + upper) << 32;
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94 | 783753fd | Isaku Yamahata | } |
95 | 783753fd | Isaku Yamahata | return val;
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96 | 783753fd | Isaku Yamahata | } |
97 | 783753fd | Isaku Yamahata | |
98 | 68f79994 | Isaku Yamahata | /* accessor function to get bridge filtering base address */
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99 | 68f79994 | Isaku Yamahata | pcibus_t pci_bridge_get_base(const PCIDevice *bridge, uint8_t type)
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100 | 783753fd | Isaku Yamahata | { |
101 | 783753fd | Isaku Yamahata | pcibus_t base; |
102 | 783753fd | Isaku Yamahata | if (type & PCI_BASE_ADDRESS_SPACE_IO) {
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103 | 783753fd | Isaku Yamahata | base = pci_config_get_io_base(bridge, |
104 | 783753fd | Isaku Yamahata | PCI_IO_BASE, PCI_IO_BASE_UPPER16); |
105 | 783753fd | Isaku Yamahata | } else {
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106 | 783753fd | Isaku Yamahata | if (type & PCI_BASE_ADDRESS_MEM_PREFETCH) {
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107 | 783753fd | Isaku Yamahata | base = pci_config_get_pref_base( |
108 | 783753fd | Isaku Yamahata | bridge, PCI_PREF_MEMORY_BASE, PCI_PREF_BASE_UPPER32); |
109 | 783753fd | Isaku Yamahata | } else {
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110 | 783753fd | Isaku Yamahata | base = pci_config_get_memory_base(bridge, PCI_MEMORY_BASE); |
111 | 783753fd | Isaku Yamahata | } |
112 | 783753fd | Isaku Yamahata | } |
113 | 783753fd | Isaku Yamahata | |
114 | 783753fd | Isaku Yamahata | return base;
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115 | 783753fd | Isaku Yamahata | } |
116 | 783753fd | Isaku Yamahata | |
117 | 68f79994 | Isaku Yamahata | /* accessor funciton to get bridge filtering limit */
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118 | 68f79994 | Isaku Yamahata | pcibus_t pci_bridge_get_limit(const PCIDevice *bridge, uint8_t type)
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119 | 783753fd | Isaku Yamahata | { |
120 | 783753fd | Isaku Yamahata | pcibus_t limit; |
121 | 783753fd | Isaku Yamahata | if (type & PCI_BASE_ADDRESS_SPACE_IO) {
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122 | 783753fd | Isaku Yamahata | limit = pci_config_get_io_base(bridge, |
123 | 783753fd | Isaku Yamahata | PCI_IO_LIMIT, PCI_IO_LIMIT_UPPER16); |
124 | 783753fd | Isaku Yamahata | limit |= 0xfff; /* PCI bridge spec 3.2.5.6. */ |
125 | 783753fd | Isaku Yamahata | } else {
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126 | 783753fd | Isaku Yamahata | if (type & PCI_BASE_ADDRESS_MEM_PREFETCH) {
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127 | 783753fd | Isaku Yamahata | limit = pci_config_get_pref_base( |
128 | 783753fd | Isaku Yamahata | bridge, PCI_PREF_MEMORY_LIMIT, PCI_PREF_LIMIT_UPPER32); |
129 | 783753fd | Isaku Yamahata | } else {
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130 | 783753fd | Isaku Yamahata | limit = pci_config_get_memory_base(bridge, PCI_MEMORY_LIMIT); |
131 | 783753fd | Isaku Yamahata | } |
132 | 783753fd | Isaku Yamahata | limit |= 0xfffff; /* PCI bridge spec 3.2.5.{1, 8}. */ |
133 | 783753fd | Isaku Yamahata | } |
134 | 783753fd | Isaku Yamahata | return limit;
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135 | 783753fd | Isaku Yamahata | } |
136 | 783753fd | Isaku Yamahata | |
137 | 68f79994 | Isaku Yamahata | /* default write_config function for PCI-to-PCI bridge */
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138 | 68f79994 | Isaku Yamahata | void pci_bridge_write_config(PCIDevice *d,
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139 | 783753fd | Isaku Yamahata | uint32_t address, uint32_t val, int len)
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140 | 783753fd | Isaku Yamahata | { |
141 | 783753fd | Isaku Yamahata | pci_default_write_config(d, address, val, len); |
142 | 783753fd | Isaku Yamahata | |
143 | 783753fd | Isaku Yamahata | if (/* io base/limit */ |
144 | 783753fd | Isaku Yamahata | ranges_overlap(address, len, PCI_IO_BASE, 2) ||
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145 | 783753fd | Isaku Yamahata | |
146 | 783753fd | Isaku Yamahata | /* memory base/limit, prefetchable base/limit and
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147 | 783753fd | Isaku Yamahata | io base/limit upper 16 */
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148 | 783753fd | Isaku Yamahata | ranges_overlap(address, len, PCI_MEMORY_BASE, 20)) {
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149 | 783753fd | Isaku Yamahata | PCIBridge *s = container_of(d, PCIBridge, dev); |
150 | 7e98e3af | Isaku Yamahata | pci_bridge_update_mappings(&s->sec_bus); |
151 | 783753fd | Isaku Yamahata | } |
152 | 783753fd | Isaku Yamahata | } |
153 | 783753fd | Isaku Yamahata | |
154 | 68f79994 | Isaku Yamahata | /* reset bridge specific configuration registers */
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155 | 68f79994 | Isaku Yamahata | void pci_bridge_reset_reg(PCIDevice *dev)
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156 | 68f79994 | Isaku Yamahata | { |
157 | 68f79994 | Isaku Yamahata | uint8_t *conf = dev->config; |
158 | 68f79994 | Isaku Yamahata | |
159 | 68f79994 | Isaku Yamahata | conf[PCI_PRIMARY_BUS] = 0;
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160 | 68f79994 | Isaku Yamahata | conf[PCI_SECONDARY_BUS] = 0;
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161 | 68f79994 | Isaku Yamahata | conf[PCI_SUBORDINATE_BUS] = 0;
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162 | 68f79994 | Isaku Yamahata | conf[PCI_SEC_LATENCY_TIMER] = 0;
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163 | 68f79994 | Isaku Yamahata | |
164 | 68f79994 | Isaku Yamahata | conf[PCI_IO_BASE] = 0;
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165 | 68f79994 | Isaku Yamahata | conf[PCI_IO_LIMIT] = 0;
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166 | 68f79994 | Isaku Yamahata | pci_set_word(conf + PCI_MEMORY_BASE, 0);
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167 | 68f79994 | Isaku Yamahata | pci_set_word(conf + PCI_MEMORY_LIMIT, 0);
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168 | 68f79994 | Isaku Yamahata | pci_set_word(conf + PCI_PREF_MEMORY_BASE, 0);
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169 | 68f79994 | Isaku Yamahata | pci_set_word(conf + PCI_PREF_MEMORY_LIMIT, 0);
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170 | 68f79994 | Isaku Yamahata | pci_set_word(conf + PCI_PREF_BASE_UPPER32, 0);
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171 | 68f79994 | Isaku Yamahata | pci_set_word(conf + PCI_PREF_LIMIT_UPPER32, 0);
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172 | 68f79994 | Isaku Yamahata | |
173 | 68f79994 | Isaku Yamahata | pci_set_word(conf + PCI_BRIDGE_CONTROL, 0);
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174 | 68f79994 | Isaku Yamahata | } |
175 | 68f79994 | Isaku Yamahata | |
176 | 68f79994 | Isaku Yamahata | /* default reset function for PCI-to-PCI bridge */
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177 | 68f79994 | Isaku Yamahata | void pci_bridge_reset(DeviceState *qdev)
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178 | 783753fd | Isaku Yamahata | { |
179 | 68f79994 | Isaku Yamahata | PCIDevice *dev = DO_UPCAST(PCIDevice, qdev, qdev); |
180 | 68f79994 | Isaku Yamahata | pci_bridge_reset_reg(dev); |
181 | 68f79994 | Isaku Yamahata | } |
182 | 783753fd | Isaku Yamahata | |
183 | 68f79994 | Isaku Yamahata | /* default qdev initialization function for PCI-to-PCI bridge */
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184 | 68f79994 | Isaku Yamahata | int pci_bridge_initfn(PCIDevice *dev)
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185 | 68f79994 | Isaku Yamahata | { |
186 | 68f79994 | Isaku Yamahata | PCIBus *parent = dev->bus; |
187 | 68f79994 | Isaku Yamahata | PCIBridge *br = DO_UPCAST(PCIBridge, dev, dev); |
188 | 68f79994 | Isaku Yamahata | PCIBus *sec_bus = &br->sec_bus; |
189 | 783753fd | Isaku Yamahata | |
190 | 783753fd | Isaku Yamahata | pci_set_word(dev->config + PCI_STATUS, |
191 | 783753fd | Isaku Yamahata | PCI_STATUS_66MHZ | PCI_STATUS_FAST_BACK); |
192 | 783753fd | Isaku Yamahata | pci_config_set_class(dev->config, PCI_CLASS_BRIDGE_PCI); |
193 | 783753fd | Isaku Yamahata | dev->config[PCI_HEADER_TYPE] = |
194 | 783753fd | Isaku Yamahata | (dev->config[PCI_HEADER_TYPE] & PCI_HEADER_TYPE_MULTI_FUNCTION) | |
195 | 783753fd | Isaku Yamahata | PCI_HEADER_TYPE_BRIDGE; |
196 | 783753fd | Isaku Yamahata | pci_set_word(dev->config + PCI_SEC_STATUS, |
197 | 783753fd | Isaku Yamahata | PCI_STATUS_66MHZ | PCI_STATUS_FAST_BACK); |
198 | 68f79994 | Isaku Yamahata | |
199 | 68f79994 | Isaku Yamahata | qbus_create_inplace(&sec_bus->qbus, &pci_bus_info, &dev->qdev, |
200 | 68f79994 | Isaku Yamahata | br->bus_name); |
201 | 68f79994 | Isaku Yamahata | sec_bus->parent_dev = dev; |
202 | 68f79994 | Isaku Yamahata | sec_bus->map_irq = br->map_irq; |
203 | 68f79994 | Isaku Yamahata | |
204 | 68f79994 | Isaku Yamahata | QLIST_INIT(&sec_bus->child); |
205 | 68f79994 | Isaku Yamahata | QLIST_INSERT_HEAD(&parent->child, sec_bus, sibling); |
206 | 783753fd | Isaku Yamahata | return 0; |
207 | 783753fd | Isaku Yamahata | } |
208 | 783753fd | Isaku Yamahata | |
209 | 68f79994 | Isaku Yamahata | /* default qdev clean up function for PCI-to-PCI bridge */
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210 | 68f79994 | Isaku Yamahata | int pci_bridge_exitfn(PCIDevice *pci_dev)
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211 | 783753fd | Isaku Yamahata | { |
212 | 783753fd | Isaku Yamahata | PCIBridge *s = DO_UPCAST(PCIBridge, dev, pci_dev); |
213 | 51a92333 | Isaku Yamahata | assert(QLIST_EMPTY(&s->sec_bus.child)); |
214 | 51a92333 | Isaku Yamahata | QLIST_REMOVE(&s->sec_bus, sibling); |
215 | 68f79994 | Isaku Yamahata | /* qbus_free() is called automatically by qdev_free() */
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216 | 783753fd | Isaku Yamahata | return 0; |
217 | 783753fd | Isaku Yamahata | } |
218 | 783753fd | Isaku Yamahata | |
219 | 68f79994 | Isaku Yamahata | /*
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220 | 68f79994 | Isaku Yamahata | * before qdev initialization(qdev_init()), this function sets bus_name and
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221 | 68f79994 | Isaku Yamahata | * map_irq callback which are necessry for pci_bridge_initfn() to
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222 | 68f79994 | Isaku Yamahata | * initialize bus.
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223 | 68f79994 | Isaku Yamahata | */
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224 | 68f79994 | Isaku Yamahata | void pci_bridge_map_irq(PCIBridge *br, const char* bus_name, |
225 | 68f79994 | Isaku Yamahata | pci_map_irq_fn map_irq) |
226 | 783753fd | Isaku Yamahata | { |
227 | 68f79994 | Isaku Yamahata | br->map_irq = map_irq; |
228 | 68f79994 | Isaku Yamahata | br->bus_name = bus_name; |
229 | 783753fd | Isaku Yamahata | } |