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4f5e19e6 IY |
1 | /* |
2 | * pci_host.c | |
3 | * | |
4 | * Copyright (c) 2009 Isaku Yamahata <yamahata at valinux co jp> | |
5 | * VA Linux Systems Japan K.K. | |
6 | * | |
7 | * This program is free software; you can redistribute it and/or modify | |
8 | * it under the terms of the GNU General Public License as published by | |
9 | * the Free Software Foundation; either version 2 of the License, or | |
10 | * (at your option) any later version. | |
11 | ||
12 | * This program is distributed in the hope that it will be useful, | |
13 | * but WITHOUT ANY WARRANTY; without even the implied warranty of | |
14 | * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the | |
15 | * GNU General Public License for more details. | |
16 | ||
17 | * You should have received a copy of the GNU General Public License along | |
70539e18 | 18 | * with this program; if not, see <http://www.gnu.org/licenses/>. |
4f5e19e6 IY |
19 | */ |
20 | ||
97d5408f | 21 | #include "qemu/osdep.h" |
c759b24f | 22 | #include "hw/pci/pci.h" |
c2077e2c | 23 | #include "hw/pci/pci_bridge.h" |
c759b24f | 24 | #include "hw/pci/pci_host.h" |
0b8fa32f | 25 | #include "qemu/module.h" |
3f1e1478 | 26 | #include "hw/pci/pci_bus.h" |
3bf4dfdd | 27 | #include "trace.h" |
4f5e19e6 IY |
28 | |
29 | /* debug PCI */ | |
30 | //#define DEBUG_PCI | |
31 | ||
32 | #ifdef DEBUG_PCI | |
33 | #define PCI_DPRINTF(fmt, ...) \ | |
34 | do { printf("pci_host_data: " fmt , ## __VA_ARGS__); } while (0) | |
35 | #else | |
36 | #define PCI_DPRINTF(fmt, ...) | |
37 | #endif | |
38 | ||
766347cc IY |
39 | /* |
40 | * PCI address | |
41 | * bit 16 - 24: bus number | |
42 | * bit 8 - 15: devfun number | |
43 | * bit 0 - 7: offset in configuration space of a given pci device | |
44 | */ | |
45 | ||
085d8134 | 46 | /* the helper function to get a PCIDevice* for a given pci address */ |
8d6514f8 | 47 | static inline PCIDevice *pci_dev_find_by_addr(PCIBus *bus, uint32_t addr) |
766347cc | 48 | { |
42331e9f IY |
49 | uint8_t bus_num = addr >> 16; |
50 | uint8_t devfn = addr >> 8; | |
51 | ||
5256d8bf | 52 | return pci_find_device(bus, bus_num, devfn); |
766347cc IY |
53 | } |
54 | ||
c2077e2c AW |
55 | static void pci_adjust_config_limit(PCIBus *bus, uint32_t *limit) |
56 | { | |
2f57db8a DG |
57 | if ((*limit > PCI_CONFIG_SPACE_SIZE) && |
58 | !pci_bus_allows_extended_config_space(bus)) { | |
59 | *limit = PCI_CONFIG_SPACE_SIZE; | |
c2077e2c AW |
60 | } |
61 | } | |
62 | ||
42e4126b JK |
63 | void pci_host_config_write_common(PCIDevice *pci_dev, uint32_t addr, |
64 | uint32_t limit, uint32_t val, uint32_t len) | |
65 | { | |
c2077e2c AW |
66 | pci_adjust_config_limit(pci_get_bus(pci_dev), &limit); |
67 | if (limit <= addr) { | |
68 | return; | |
69 | } | |
70 | ||
42e4126b | 71 | assert(len <= 4); |
3f1e1478 C |
72 | /* non-zero functions are only exposed when function 0 is present, |
73 | * allowing direct removal of unexposed functions. | |
74 | */ | |
75 | if (pci_dev->qdev.hotplugged && !pci_get_function_0(pci_dev)) { | |
76 | return; | |
77 | } | |
78 | ||
3bf4dfdd AK |
79 | trace_pci_cfg_write(pci_dev->name, PCI_SLOT(pci_dev->devfn), |
80 | PCI_FUNC(pci_dev->devfn), addr, val); | |
42e4126b JK |
81 | pci_dev->config_write(pci_dev, addr, val, MIN(len, limit - addr)); |
82 | } | |
83 | ||
84 | uint32_t pci_host_config_read_common(PCIDevice *pci_dev, uint32_t addr, | |
85 | uint32_t limit, uint32_t len) | |
86 | { | |
3bf4dfdd AK |
87 | uint32_t ret; |
88 | ||
c2077e2c AW |
89 | pci_adjust_config_limit(pci_get_bus(pci_dev), &limit); |
90 | if (limit <= addr) { | |
91 | return ~0x0; | |
92 | } | |
93 | ||
42e4126b | 94 | assert(len <= 4); |
3f1e1478 C |
95 | /* non-zero functions are only exposed when function 0 is present, |
96 | * allowing direct removal of unexposed functions. | |
97 | */ | |
98 | if (pci_dev->qdev.hotplugged && !pci_get_function_0(pci_dev)) { | |
99 | return ~0x0; | |
100 | } | |
101 | ||
3bf4dfdd AK |
102 | ret = pci_dev->config_read(pci_dev, addr, MIN(len, limit - addr)); |
103 | trace_pci_cfg_read(pci_dev->name, PCI_SLOT(pci_dev->devfn), | |
104 | PCI_FUNC(pci_dev->devfn), addr, ret); | |
105 | ||
106 | return ret; | |
42e4126b JK |
107 | } |
108 | ||
f2a7e8f1 | 109 | void pci_data_write(PCIBus *s, uint32_t addr, uint32_t val, unsigned len) |
766347cc | 110 | { |
8d6514f8 | 111 | PCIDevice *pci_dev = pci_dev_find_by_addr(s, addr); |
7ac901cd | 112 | uint32_t config_addr = addr & (PCI_CONFIG_SPACE_SIZE - 1); |
766347cc | 113 | |
42e4126b | 114 | if (!pci_dev) { |
766347cc | 115 | return; |
42e4126b | 116 | } |
766347cc | 117 | |
42e4126b JK |
118 | pci_host_config_write_common(pci_dev, config_addr, PCI_CONFIG_SPACE_SIZE, |
119 | val, len); | |
766347cc IY |
120 | } |
121 | ||
f2a7e8f1 | 122 | uint32_t pci_data_read(PCIBus *s, uint32_t addr, unsigned len) |
766347cc | 123 | { |
8d6514f8 | 124 | PCIDevice *pci_dev = pci_dev_find_by_addr(s, addr); |
7ac901cd | 125 | uint32_t config_addr = addr & (PCI_CONFIG_SPACE_SIZE - 1); |
766347cc IY |
126 | |
127 | if (!pci_dev) { | |
4677d8ed | 128 | return ~0x0; |
766347cc IY |
129 | } |
130 | ||
4ce537a7 PMD |
131 | return pci_host_config_read_common(pci_dev, config_addr, |
132 | PCI_CONFIG_SPACE_SIZE, len); | |
766347cc IY |
133 | } |
134 | ||
a8170e5e | 135 | static void pci_host_config_write(void *opaque, hwaddr addr, |
d0ed8076 | 136 | uint64_t val, unsigned len) |
a455783b | 137 | { |
d0ed8076 | 138 | PCIHostState *s = opaque; |
a455783b | 139 | |
d0ed8076 | 140 | PCI_DPRINTF("%s addr " TARGET_FMT_plx " len %d val %"PRIx64"\n", |
9f6f0423 | 141 | __func__, addr, len, val); |
cdde6ffc AK |
142 | if (addr != 0 || len != 4) { |
143 | return; | |
144 | } | |
a455783b IY |
145 | s->config_reg = val; |
146 | } | |
147 | ||
a8170e5e | 148 | static uint64_t pci_host_config_read(void *opaque, hwaddr addr, |
d0ed8076 | 149 | unsigned len) |
a455783b | 150 | { |
d0ed8076 | 151 | PCIHostState *s = opaque; |
a455783b | 152 | uint32_t val = s->config_reg; |
952760bb | 153 | |
d0ed8076 | 154 | PCI_DPRINTF("%s addr " TARGET_FMT_plx " len %d val %"PRIx32"\n", |
9f6f0423 | 155 | __func__, addr, len, val); |
a455783b IY |
156 | return val; |
157 | } | |
158 | ||
a8170e5e | 159 | static void pci_host_data_write(void *opaque, hwaddr addr, |
d0ed8076 | 160 | uint64_t val, unsigned len) |
a455783b | 161 | { |
d0ed8076 | 162 | PCIHostState *s = opaque; |
4ce537a7 | 163 | |
9f6f0423 MT |
164 | if (s->config_reg & (1u << 31)) |
165 | pci_data_write(s->bus, s->config_reg | (addr & 3), val, len); | |
a455783b IY |
166 | } |
167 | ||
d0ed8076 | 168 | static uint64_t pci_host_data_read(void *opaque, |
a8170e5e | 169 | hwaddr addr, unsigned len) |
a455783b | 170 | { |
d0ed8076 | 171 | PCIHostState *s = opaque; |
4ce537a7 | 172 | |
ac43fa50 | 173 | if (!(s->config_reg & (1U << 31))) { |
9f6f0423 | 174 | return 0xffffffff; |
ac43fa50 | 175 | } |
4ce537a7 | 176 | return pci_data_read(s->bus, s->config_reg | (addr & 3), len); |
9f6f0423 | 177 | } |
a455783b | 178 | |
d0ed8076 AK |
179 | const MemoryRegionOps pci_host_conf_le_ops = { |
180 | .read = pci_host_config_read, | |
181 | .write = pci_host_config_write, | |
182 | .endianness = DEVICE_LITTLE_ENDIAN, | |
183 | }; | |
a455783b | 184 | |
d0ed8076 AK |
185 | const MemoryRegionOps pci_host_conf_be_ops = { |
186 | .read = pci_host_config_read, | |
187 | .write = pci_host_config_write, | |
188 | .endianness = DEVICE_BIG_ENDIAN, | |
189 | }; | |
d2c33733 | 190 | |
d0ed8076 AK |
191 | const MemoryRegionOps pci_host_data_le_ops = { |
192 | .read = pci_host_data_read, | |
193 | .write = pci_host_data_write, | |
194 | .endianness = DEVICE_LITTLE_ENDIAN, | |
195 | }; | |
196 | ||
197 | const MemoryRegionOps pci_host_data_be_ops = { | |
198 | .read = pci_host_data_read, | |
199 | .write = pci_host_data_write, | |
200 | .endianness = DEVICE_BIG_ENDIAN, | |
201 | }; | |
a455783b | 202 | |
b44ff9d4 AF |
203 | static const TypeInfo pci_host_type_info = { |
204 | .name = TYPE_PCI_HOST_BRIDGE, | |
205 | .parent = TYPE_SYS_BUS_DEVICE, | |
206 | .abstract = true, | |
568f0690 | 207 | .class_size = sizeof(PCIHostBridgeClass), |
b44ff9d4 AF |
208 | .instance_size = sizeof(PCIHostState), |
209 | }; | |
210 | ||
211 | static void pci_host_register_types(void) | |
212 | { | |
213 | type_register_static(&pci_host_type_info); | |
214 | } | |
4f5e19e6 | 215 | |
b44ff9d4 | 216 | type_init(pci_host_register_types) |