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13#include "qemu/osdep.h"
14#include "qapi/error.h"
15#include "hw/pci/pci.h"
16#include "hw/pci/pci_bus.h"
17#include "hw/pci/pci_host.h"
18#include "hw/qdev-properties.h"
19#include "hw/pci/pci_bridge.h"
20#include "qemu/range.h"
21#include "qemu/error-report.h"
22#include "qemu/module.h"
23#include "sysemu/numa.h"
24#include "hw/boards.h"
25
26#define TYPE_PXB_BUS "pxb-bus"
27#define PXB_BUS(obj) OBJECT_CHECK(PXBBus, (obj), TYPE_PXB_BUS)
28
29#define TYPE_PXB_PCIE_BUS "pxb-pcie-bus"
30#define PXB_PCIE_BUS(obj) OBJECT_CHECK(PXBBus, (obj), TYPE_PXB_PCIE_BUS)
31
32typedef struct PXBBus {
33
34 PCIBus parent_obj;
35
36
37 char bus_path[8];
38} PXBBus;
39
40#define TYPE_PXB_DEVICE "pxb"
41#define PXB_DEV(obj) OBJECT_CHECK(PXBDev, (obj), TYPE_PXB_DEVICE)
42
43#define TYPE_PXB_PCIE_DEVICE "pxb-pcie"
44#define PXB_PCIE_DEV(obj) OBJECT_CHECK(PXBDev, (obj), TYPE_PXB_PCIE_DEVICE)
45
46typedef struct PXBDev {
47
48 PCIDevice parent_obj;
49
50
51 uint8_t bus_nr;
52 uint16_t numa_node;
53} PXBDev;
54
55static PXBDev *convert_to_pxb(PCIDevice *dev)
56{
57 return pci_bus_is_express(pci_get_bus(dev))
58 ? PXB_PCIE_DEV(dev) : PXB_DEV(dev);
59}
60
61static GList *pxb_dev_list;
62
63#define TYPE_PXB_HOST "pxb-host"
64
65static int pxb_bus_num(PCIBus *bus)
66{
67 PXBDev *pxb = convert_to_pxb(bus->parent_dev);
68
69 return pxb->bus_nr;
70}
71
72static uint16_t pxb_bus_numa_node(PCIBus *bus)
73{
74 PXBDev *pxb = convert_to_pxb(bus->parent_dev);
75
76 return pxb->numa_node;
77}
78
79static void pxb_bus_class_init(ObjectClass *class, void *data)
80{
81 PCIBusClass *pbc = PCI_BUS_CLASS(class);
82
83 pbc->bus_num = pxb_bus_num;
84 pbc->numa_node = pxb_bus_numa_node;
85}
86
87static const TypeInfo pxb_bus_info = {
88 .name = TYPE_PXB_BUS,
89 .parent = TYPE_PCI_BUS,
90 .instance_size = sizeof(PXBBus),
91 .class_init = pxb_bus_class_init,
92};
93
94static const TypeInfo pxb_pcie_bus_info = {
95 .name = TYPE_PXB_PCIE_BUS,
96 .parent = TYPE_PCIE_BUS,
97 .instance_size = sizeof(PXBBus),
98 .class_init = pxb_bus_class_init,
99};
100
101static const char *pxb_host_root_bus_path(PCIHostState *host_bridge,
102 PCIBus *rootbus)
103{
104 PXBBus *bus = pci_bus_is_express(rootbus) ?
105 PXB_PCIE_BUS(rootbus) : PXB_BUS(rootbus);
106
107 snprintf(bus->bus_path, 8, "0000:%02x", pxb_bus_num(rootbus));
108 return bus->bus_path;
109}
110
111static char *pxb_host_ofw_unit_address(const SysBusDevice *dev)
112{
113 const PCIHostState *pxb_host;
114 const PCIBus *pxb_bus;
115 const PXBDev *pxb_dev;
116 int position;
117 const DeviceState *pxb_dev_base;
118 const PCIHostState *main_host;
119 const SysBusDevice *main_host_sbd;
120
121 pxb_host = PCI_HOST_BRIDGE(dev);
122 pxb_bus = pxb_host->bus;
123 pxb_dev = convert_to_pxb(pxb_bus->parent_dev);
124 position = g_list_index(pxb_dev_list, pxb_dev);
125 assert(position >= 0);
126
127 pxb_dev_base = DEVICE(pxb_dev);
128 main_host = PCI_HOST_BRIDGE(pxb_dev_base->parent_bus->parent);
129 main_host_sbd = SYS_BUS_DEVICE(main_host);
130
131 if (main_host_sbd->num_mmio > 0) {
132 return g_strdup_printf(TARGET_FMT_plx ",%x",
133 main_host_sbd->mmio[0].addr, position + 1);
134 }
135 if (main_host_sbd->num_pio > 0) {
136 return g_strdup_printf("i%04x,%x",
137 main_host_sbd->pio[0], position + 1);
138 }
139 return NULL;
140}
141
142static void pxb_host_class_init(ObjectClass *class, void *data)
143{
144 DeviceClass *dc = DEVICE_CLASS(class);
145 SysBusDeviceClass *sbc = SYS_BUS_DEVICE_CLASS(class);
146 PCIHostBridgeClass *hc = PCI_HOST_BRIDGE_CLASS(class);
147
148 dc->fw_name = "pci";
149
150 dc->user_creatable = false;
151 sbc->explicit_ofw_unit_address = pxb_host_ofw_unit_address;
152 hc->root_bus_path = pxb_host_root_bus_path;
153}
154
155static const TypeInfo pxb_host_info = {
156 .name = TYPE_PXB_HOST,
157 .parent = TYPE_PCI_HOST_BRIDGE,
158 .class_init = pxb_host_class_init,
159};
160
161
162
163
164static void pxb_register_bus(PCIDevice *dev, PCIBus *pxb_bus, Error **errp)
165{
166 PCIBus *bus = pci_get_bus(dev);
167 int pxb_bus_num = pci_bus_num(pxb_bus);
168
169 if (bus->parent_dev) {
170 error_setg(errp, "PXB devices can be attached only to root bus");
171 return;
172 }
173
174 QLIST_FOREACH(bus, &bus->child, sibling) {
175 if (pci_bus_num(bus) == pxb_bus_num) {
176 error_setg(errp, "Bus %d is already in use", pxb_bus_num);
177 return;
178 }
179 }
180 QLIST_INSERT_HEAD(&pci_get_bus(dev)->child, pxb_bus, sibling);
181}
182
183static int pxb_map_irq_fn(PCIDevice *pci_dev, int pin)
184{
185 PCIDevice *pxb = pci_get_bus(pci_dev)->parent_dev;
186
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190
191
192
193
194
195
196
197
198 return pin - PCI_SLOT(pxb->devfn);
199}
200
201static gint pxb_compare(gconstpointer a, gconstpointer b)
202{
203 const PXBDev *pxb_a = a, *pxb_b = b;
204
205 return pxb_a->bus_nr < pxb_b->bus_nr ? -1 :
206 pxb_a->bus_nr > pxb_b->bus_nr ? 1 :
207 0;
208}
209
210static void pxb_dev_realize_common(PCIDevice *dev, bool pcie, Error **errp)
211{
212 PXBDev *pxb = convert_to_pxb(dev);
213 DeviceState *ds, *bds = NULL;
214 PCIBus *bus;
215 const char *dev_name = NULL;
216 Error *local_err = NULL;
217 MachineState *ms = MACHINE(qdev_get_machine());
218
219 if (ms->numa_state == NULL) {
220 error_setg(errp, "NUMA is not supported by this machine-type");
221 return;
222 }
223
224 if (pxb->numa_node != NUMA_NODE_UNASSIGNED &&
225 pxb->numa_node >= ms->numa_state->num_nodes) {
226 error_setg(errp, "Illegal numa node %d", pxb->numa_node);
227 return;
228 }
229
230 if (dev->qdev.id && *dev->qdev.id) {
231 dev_name = dev->qdev.id;
232 }
233
234 ds = qdev_create(NULL, TYPE_PXB_HOST);
235 if (pcie) {
236 bus = pci_root_bus_new(ds, dev_name, NULL, NULL, 0, TYPE_PXB_PCIE_BUS);
237 } else {
238 bus = pci_root_bus_new(ds, "pxb-internal", NULL, NULL, 0, TYPE_PXB_BUS);
239 bds = qdev_create(BUS(bus), "pci-bridge");
240 bds->id = dev_name;
241 qdev_prop_set_uint8(bds, PCI_BRIDGE_DEV_PROP_CHASSIS_NR, pxb->bus_nr);
242 qdev_prop_set_bit(bds, PCI_BRIDGE_DEV_PROP_SHPC, false);
243 }
244
245 bus->parent_dev = dev;
246 bus->address_space_mem = pci_get_bus(dev)->address_space_mem;
247 bus->address_space_io = pci_get_bus(dev)->address_space_io;
248 bus->map_irq = pxb_map_irq_fn;
249
250 PCI_HOST_BRIDGE(ds)->bus = bus;
251
252 pxb_register_bus(dev, bus, &local_err);
253 if (local_err) {
254 error_propagate(errp, local_err);
255 goto err_register_bus;
256 }
257
258 qdev_init_nofail(ds);
259 if (bds) {
260 qdev_init_nofail(bds);
261 }
262
263 pci_word_test_and_set_mask(dev->config + PCI_STATUS,
264 PCI_STATUS_66MHZ | PCI_STATUS_FAST_BACK);
265 pci_config_set_class(dev->config, PCI_CLASS_BRIDGE_HOST);
266
267 pxb_dev_list = g_list_insert_sorted(pxb_dev_list, pxb, pxb_compare);
268 return;
269
270err_register_bus:
271 object_unref(OBJECT(bds));
272 object_unparent(OBJECT(bus));
273 object_unref(OBJECT(ds));
274}
275
276static void pxb_dev_realize(PCIDevice *dev, Error **errp)
277{
278 if (pci_bus_is_express(pci_get_bus(dev))) {
279 error_setg(errp, "pxb devices cannot reside on a PCIe bus");
280 return;
281 }
282
283 pxb_dev_realize_common(dev, false, errp);
284}
285
286static void pxb_dev_exitfn(PCIDevice *pci_dev)
287{
288 PXBDev *pxb = convert_to_pxb(pci_dev);
289
290 pxb_dev_list = g_list_remove(pxb_dev_list, pxb);
291}
292
293static Property pxb_dev_properties[] = {
294
295 DEFINE_PROP_UINT8("bus_nr", PXBDev, bus_nr, 0),
296 DEFINE_PROP_UINT16("numa_node", PXBDev, numa_node, NUMA_NODE_UNASSIGNED),
297 DEFINE_PROP_END_OF_LIST(),
298};
299
300static void pxb_dev_class_init(ObjectClass *klass, void *data)
301{
302 DeviceClass *dc = DEVICE_CLASS(klass);
303 PCIDeviceClass *k = PCI_DEVICE_CLASS(klass);
304
305 k->realize = pxb_dev_realize;
306 k->exit = pxb_dev_exitfn;
307 k->vendor_id = PCI_VENDOR_ID_REDHAT;
308 k->device_id = PCI_DEVICE_ID_REDHAT_PXB;
309 k->class_id = PCI_CLASS_BRIDGE_HOST;
310
311 dc->desc = "PCI Expander Bridge";
312 dc->props = pxb_dev_properties;
313 dc->hotpluggable = false;
314 set_bit(DEVICE_CATEGORY_BRIDGE, dc->categories);
315}
316
317static const TypeInfo pxb_dev_info = {
318 .name = TYPE_PXB_DEVICE,
319 .parent = TYPE_PCI_DEVICE,
320 .instance_size = sizeof(PXBDev),
321 .class_init = pxb_dev_class_init,
322 .interfaces = (InterfaceInfo[]) {
323 { INTERFACE_CONVENTIONAL_PCI_DEVICE },
324 { },
325 },
326};
327
328static void pxb_pcie_dev_realize(PCIDevice *dev, Error **errp)
329{
330 if (!pci_bus_is_express(pci_get_bus(dev))) {
331 error_setg(errp, "pxb-pcie devices cannot reside on a PCI bus");
332 return;
333 }
334
335 pxb_dev_realize_common(dev, true, errp);
336}
337
338static void pxb_pcie_dev_class_init(ObjectClass *klass, void *data)
339{
340 DeviceClass *dc = DEVICE_CLASS(klass);
341 PCIDeviceClass *k = PCI_DEVICE_CLASS(klass);
342
343 k->realize = pxb_pcie_dev_realize;
344 k->exit = pxb_dev_exitfn;
345 k->vendor_id = PCI_VENDOR_ID_REDHAT;
346 k->device_id = PCI_DEVICE_ID_REDHAT_PXB_PCIE;
347 k->class_id = PCI_CLASS_BRIDGE_HOST;
348
349 dc->desc = "PCI Express Expander Bridge";
350 dc->props = pxb_dev_properties;
351 dc->hotpluggable = false;
352 set_bit(DEVICE_CATEGORY_BRIDGE, dc->categories);
353}
354
355static const TypeInfo pxb_pcie_dev_info = {
356 .name = TYPE_PXB_PCIE_DEVICE,
357 .parent = TYPE_PCI_DEVICE,
358 .instance_size = sizeof(PXBDev),
359 .class_init = pxb_pcie_dev_class_init,
360 .interfaces = (InterfaceInfo[]) {
361 { INTERFACE_CONVENTIONAL_PCI_DEVICE },
362 { },
363 },
364};
365
366static void pxb_register_types(void)
367{
368 type_register_static(&pxb_bus_info);
369 type_register_static(&pxb_pcie_bus_info);
370 type_register_static(&pxb_host_info);
371 type_register_static(&pxb_dev_info);
372 type_register_static(&pxb_pcie_dev_info);
373}
374
375type_init(pxb_register_types)
376
